blob: 1ce0d743029ce6048e35d06462cf8c26b91b255f [file] [log] [blame]
David Ertmane78b80b2014-02-04 01:56:06 +00001/* Intel PRO/1000 Linux driver
2 * Copyright(c) 1999 - 2014 Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
16 * Contact Information:
17 * Linux NICS <linux.nics@intel.com>
18 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
19 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
20 */
Auke Kokbc7f75f2007-09-17 12:30:59 -070021
Bruce Allan8544b9f2010-03-24 12:55:30 +000022#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
Auke Kokbc7f75f2007-09-17 12:30:59 -070024#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/init.h>
27#include <linux/pci.h>
28#include <linux/vmalloc.h>
29#include <linux/pagemap.h>
30#include <linux/delay.h>
31#include <linux/netdevice.h>
Bruce Allan9fb7a5f2011-07-29 05:52:51 +000032#include <linux/interrupt.h>
Auke Kokbc7f75f2007-09-17 12:30:59 -070033#include <linux/tcp.h>
34#include <linux/ipv6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090035#include <linux/slab.h>
Auke Kokbc7f75f2007-09-17 12:30:59 -070036#include <net/checksum.h>
37#include <net/ip6_checksum.h>
Auke Kokbc7f75f2007-09-17 12:30:59 -070038#include <linux/ethtool.h>
39#include <linux/if_vlan.h>
40#include <linux/cpu.h>
41#include <linux/smp.h>
Linus Torvalds7e0bb712011-10-25 15:18:39 +020042#include <linux/pm_qos.h>
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +000043#include <linux/pm_runtime.h>
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +000044#include <linux/aer.h>
Paul Gortmaker70c71602011-05-22 16:47:17 -040045#include <linux/prefetch.h>
Auke Kokbc7f75f2007-09-17 12:30:59 -070046
47#include "e1000.h"
48
Bruce Allanb3ccf262011-05-19 01:53:41 +000049#define DRV_EXTRAVERSION "-k"
Bruce Allanc14c6432010-06-16 13:28:34 +000050
Bruce Allan8defe712013-03-06 09:03:13 +000051#define DRV_VERSION "2.3.2" DRV_EXTRAVERSION
Auke Kokbc7f75f2007-09-17 12:30:59 -070052char e1000e_driver_name[] = "e1000e";
53const char e1000e_driver_version[] = DRV_VERSION;
54
stephen hemmingerb3f4d592012-03-13 06:04:20 +000055#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
56static int debug = -1;
57module_param(debug, int, 0);
58MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
59
Auke Kokbc7f75f2007-09-17 12:30:59 -070060static const struct e1000_info *e1000_info_tbl[] = {
61 [board_82571] = &e1000_82571_info,
62 [board_82572] = &e1000_82572_info,
63 [board_82573] = &e1000_82573_info,
Bruce Allan4662e822008-08-26 18:37:06 -070064 [board_82574] = &e1000_82574_info,
Alexander Duyck8c81c9c2009-03-19 01:12:27 +000065 [board_82583] = &e1000_82583_info,
Auke Kokbc7f75f2007-09-17 12:30:59 -070066 [board_80003es2lan] = &e1000_es2_info,
67 [board_ich8lan] = &e1000_ich8_info,
68 [board_ich9lan] = &e1000_ich9_info,
Bruce Allanf4187b52008-08-26 18:36:50 -070069 [board_ich10lan] = &e1000_ich10_info,
Bruce Allana4f58f52009-06-02 11:29:18 +000070 [board_pchlan] = &e1000_pch_info,
Bruce Alland3738bb2010-06-16 13:27:28 +000071 [board_pch2lan] = &e1000_pch2_info,
Bruce Allan2fbe4522012-04-19 03:21:47 +000072 [board_pch_lpt] = &e1000_pch_lpt_info,
Auke Kokbc7f75f2007-09-17 12:30:59 -070073};
74
Taku Izumi84f4ee92010-04-27 14:39:08 +000075struct e1000_reg_info {
76 u32 ofs;
77 char *name;
78};
79
Taku Izumi84f4ee92010-04-27 14:39:08 +000080static const struct e1000_reg_info e1000_reg_info_tbl[] = {
Taku Izumi84f4ee92010-04-27 14:39:08 +000081 /* General Registers */
82 {E1000_CTRL, "CTRL"},
83 {E1000_STATUS, "STATUS"},
84 {E1000_CTRL_EXT, "CTRL_EXT"},
85
86 /* Interrupt Registers */
87 {E1000_ICR, "ICR"},
88
Bruce Allanaf667a22010-12-31 06:10:01 +000089 /* Rx Registers */
Taku Izumi84f4ee92010-04-27 14:39:08 +000090 {E1000_RCTL, "RCTL"},
Bruce Allan1e360522012-03-20 03:48:13 +000091 {E1000_RDLEN(0), "RDLEN"},
92 {E1000_RDH(0), "RDH"},
93 {E1000_RDT(0), "RDT"},
Taku Izumi84f4ee92010-04-27 14:39:08 +000094 {E1000_RDTR, "RDTR"},
95 {E1000_RXDCTL(0), "RXDCTL"},
96 {E1000_ERT, "ERT"},
Bruce Allan1e360522012-03-20 03:48:13 +000097 {E1000_RDBAL(0), "RDBAL"},
98 {E1000_RDBAH(0), "RDBAH"},
Taku Izumi84f4ee92010-04-27 14:39:08 +000099 {E1000_RDFH, "RDFH"},
100 {E1000_RDFT, "RDFT"},
101 {E1000_RDFHS, "RDFHS"},
102 {E1000_RDFTS, "RDFTS"},
103 {E1000_RDFPC, "RDFPC"},
104
Bruce Allanaf667a22010-12-31 06:10:01 +0000105 /* Tx Registers */
Taku Izumi84f4ee92010-04-27 14:39:08 +0000106 {E1000_TCTL, "TCTL"},
Bruce Allan1e360522012-03-20 03:48:13 +0000107 {E1000_TDBAL(0), "TDBAL"},
108 {E1000_TDBAH(0), "TDBAH"},
109 {E1000_TDLEN(0), "TDLEN"},
110 {E1000_TDH(0), "TDH"},
111 {E1000_TDT(0), "TDT"},
Taku Izumi84f4ee92010-04-27 14:39:08 +0000112 {E1000_TIDV, "TIDV"},
113 {E1000_TXDCTL(0), "TXDCTL"},
114 {E1000_TADV, "TADV"},
115 {E1000_TARC(0), "TARC"},
116 {E1000_TDFH, "TDFH"},
117 {E1000_TDFT, "TDFT"},
118 {E1000_TDFHS, "TDFHS"},
119 {E1000_TDFTS, "TDFTS"},
120 {E1000_TDFPC, "TDFPC"},
121
122 /* List Terminator */
Bruce Allanf36bb6c2012-01-31 06:38:04 +0000123 {0, NULL}
Taku Izumi84f4ee92010-04-27 14:39:08 +0000124};
125
Bruce Allane921eb12012-11-28 09:28:37 +0000126/**
Andi Kleenc6f31482014-05-20 08:22:45 +0000127 * __ew32_prepare - prepare to write to MAC CSR register on certain parts
128 * @hw: pointer to the HW structure
129 *
130 * When updating the MAC CSR registers, the Manageability Engine (ME) could
131 * be accessing the registers at the same time. Normally, this is handled in
132 * h/w by an arbiter but on some parts there is a bug that acknowledges Host
133 * accesses later than it should which could result in the register to have
134 * an incorrect value. Workaround this by checking the FWSM register which
135 * has bit 24 set while ME is accessing MAC CSR registers, wait if it is set
136 * and try again a number of times.
137 **/
138s32 __ew32_prepare(struct e1000_hw *hw)
139{
140 s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT;
141
142 while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i)
143 udelay(50);
144
145 return i;
146}
147
148void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val)
149{
150 if (hw->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
151 __ew32_prepare(hw);
152
153 writel(val, hw->hw_addr + reg);
154}
155
156/**
Taku Izumi84f4ee92010-04-27 14:39:08 +0000157 * e1000_regdump - register printout routine
Bruce Allane921eb12012-11-28 09:28:37 +0000158 * @hw: pointer to the HW structure
159 * @reginfo: pointer to the register info table
160 **/
Taku Izumi84f4ee92010-04-27 14:39:08 +0000161static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
162{
163 int n = 0;
164 char rname[16];
165 u32 regs[8];
166
167 switch (reginfo->ofs) {
168 case E1000_RXDCTL(0):
169 for (n = 0; n < 2; n++)
170 regs[n] = __er32(hw, E1000_RXDCTL(n));
171 break;
172 case E1000_TXDCTL(0):
173 for (n = 0; n < 2; n++)
174 regs[n] = __er32(hw, E1000_TXDCTL(n));
175 break;
176 case E1000_TARC(0):
177 for (n = 0; n < 2; n++)
178 regs[n] = __er32(hw, E1000_TARC(n));
179 break;
180 default:
Jeff Kirsheref456f82011-11-03 11:40:28 +0000181 pr_info("%-15s %08x\n",
182 reginfo->name, __er32(hw, reginfo->ofs));
Taku Izumi84f4ee92010-04-27 14:39:08 +0000183 return;
184 }
185
186 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
Jeff Kirsheref456f82011-11-03 11:40:28 +0000187 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000188}
189
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000190static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
191 struct e1000_buffer *bi)
192{
193 int i;
194 struct e1000_ps_page *ps_page;
195
196 for (i = 0; i < adapter->rx_ps_pages; i++) {
197 ps_page = &bi->ps_pages[i];
198
199 if (ps_page->page) {
200 pr_info("packet dump for ps_page %d:\n", i);
201 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
202 16, 1, page_address(ps_page->page),
203 PAGE_SIZE, true);
204 }
205 }
206}
207
Bruce Allane921eb12012-11-28 09:28:37 +0000208/**
Bruce Allanaf667a22010-12-31 06:10:01 +0000209 * e1000e_dump - Print registers, Tx-ring and Rx-ring
Bruce Allane921eb12012-11-28 09:28:37 +0000210 * @adapter: board private structure
211 **/
Taku Izumi84f4ee92010-04-27 14:39:08 +0000212static void e1000e_dump(struct e1000_adapter *adapter)
213{
214 struct net_device *netdev = adapter->netdev;
215 struct e1000_hw *hw = &adapter->hw;
216 struct e1000_reg_info *reginfo;
217 struct e1000_ring *tx_ring = adapter->tx_ring;
218 struct e1000_tx_desc *tx_desc;
Bruce Allanaf667a22010-12-31 06:10:01 +0000219 struct my_u0 {
Bruce Allane885d762012-01-31 06:37:32 +0000220 __le64 a;
221 __le64 b;
Bruce Allanaf667a22010-12-31 06:10:01 +0000222 } *u0;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000223 struct e1000_buffer *buffer_info;
224 struct e1000_ring *rx_ring = adapter->rx_ring;
225 union e1000_rx_desc_packet_split *rx_desc_ps;
Bruce Allan5f450212011-07-22 06:21:46 +0000226 union e1000_rx_desc_extended *rx_desc;
Bruce Allanaf667a22010-12-31 06:10:01 +0000227 struct my_u1 {
Bruce Allane885d762012-01-31 06:37:32 +0000228 __le64 a;
229 __le64 b;
230 __le64 c;
231 __le64 d;
Bruce Allanaf667a22010-12-31 06:10:01 +0000232 } *u1;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000233 u32 staterr;
234 int i = 0;
235
236 if (!netif_msg_hw(adapter))
237 return;
238
239 /* Print netdevice Info */
240 if (netdev) {
241 dev_info(&adapter->pdev->dev, "Net device Info\n");
Jeff Kirsheref456f82011-11-03 11:40:28 +0000242 pr_info("Device Name state trans_start last_rx\n");
Bruce Allane5fe2542013-02-20 04:06:27 +0000243 pr_info("%-15s %016lX %016lX %016lX\n", netdev->name,
244 netdev->state, netdev->trans_start, netdev->last_rx);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000245 }
246
247 /* Print Registers */
248 dev_info(&adapter->pdev->dev, "Register Dump\n");
Jeff Kirsheref456f82011-11-03 11:40:28 +0000249 pr_info(" Register Name Value\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000250 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
251 reginfo->name; reginfo++) {
252 e1000_regdump(hw, reginfo);
253 }
254
Bruce Allanaf667a22010-12-31 06:10:01 +0000255 /* Print Tx Ring Summary */
Taku Izumi84f4ee92010-04-27 14:39:08 +0000256 if (!netdev || !netif_running(netdev))
Bruce Allanfe1e9802012-01-31 06:37:54 +0000257 return;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000258
Bruce Allanaf667a22010-12-31 06:10:01 +0000259 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
Jeff Kirsheref456f82011-11-03 11:40:28 +0000260 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000261 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
Jeff Kirsheref456f82011-11-03 11:40:28 +0000262 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
263 0, tx_ring->next_to_use, tx_ring->next_to_clean,
264 (unsigned long long)buffer_info->dma,
265 buffer_info->length,
266 buffer_info->next_to_watch,
267 (unsigned long long)buffer_info->time_stamp);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000268
Bruce Allanaf667a22010-12-31 06:10:01 +0000269 /* Print Tx Ring */
Taku Izumi84f4ee92010-04-27 14:39:08 +0000270 if (!netif_msg_tx_done(adapter))
271 goto rx_ring_summary;
272
Bruce Allanaf667a22010-12-31 06:10:01 +0000273 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000274
275 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
276 *
277 * Legacy Transmit Descriptor
278 * +--------------------------------------------------------------+
279 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
280 * +--------------------------------------------------------------+
281 * 8 | Special | CSS | Status | CMD | CSO | Length |
282 * +--------------------------------------------------------------+
283 * 63 48 47 36 35 32 31 24 23 16 15 0
284 *
285 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
286 * 63 48 47 40 39 32 31 16 15 8 7 0
287 * +----------------------------------------------------------------+
288 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
289 * +----------------------------------------------------------------+
290 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
291 * +----------------------------------------------------------------+
292 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
293 *
294 * Extended Data Descriptor (DTYP=0x1)
295 * +----------------------------------------------------------------+
296 * 0 | Buffer Address [63:0] |
297 * +----------------------------------------------------------------+
298 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
299 * +----------------------------------------------------------------+
300 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
301 */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000302 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n");
303 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n");
304 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000305 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
Jeff Kirsheref456f82011-11-03 11:40:28 +0000306 const char *next_desc;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000307 tx_desc = E1000_TX_DESC(*tx_ring, i);
308 buffer_info = &tx_ring->buffer_info[i];
309 u0 = (struct my_u0 *)tx_desc;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000310 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
Jeff Kirsheref456f82011-11-03 11:40:28 +0000311 next_desc = " NTC/U";
Taku Izumi84f4ee92010-04-27 14:39:08 +0000312 else if (i == tx_ring->next_to_use)
Jeff Kirsheref456f82011-11-03 11:40:28 +0000313 next_desc = " NTU";
Taku Izumi84f4ee92010-04-27 14:39:08 +0000314 else if (i == tx_ring->next_to_clean)
Jeff Kirsheref456f82011-11-03 11:40:28 +0000315 next_desc = " NTC";
Taku Izumi84f4ee92010-04-27 14:39:08 +0000316 else
Jeff Kirsheref456f82011-11-03 11:40:28 +0000317 next_desc = "";
318 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n",
319 (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
320 ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
321 i,
322 (unsigned long long)le64_to_cpu(u0->a),
323 (unsigned long long)le64_to_cpu(u0->b),
324 (unsigned long long)buffer_info->dma,
325 buffer_info->length, buffer_info->next_to_watch,
326 (unsigned long long)buffer_info->time_stamp,
327 buffer_info->skb, next_desc);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000328
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000329 if (netif_msg_pktdata(adapter) && buffer_info->skb)
Taku Izumi84f4ee92010-04-27 14:39:08 +0000330 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000331 16, 1, buffer_info->skb->data,
332 buffer_info->skb->len, true);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000333 }
334
Bruce Allanaf667a22010-12-31 06:10:01 +0000335 /* Print Rx Ring Summary */
Taku Izumi84f4ee92010-04-27 14:39:08 +0000336rx_ring_summary:
Bruce Allanaf667a22010-12-31 06:10:01 +0000337 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
Jeff Kirsheref456f82011-11-03 11:40:28 +0000338 pr_info("Queue [NTU] [NTC]\n");
339 pr_info(" %5d %5X %5X\n",
340 0, rx_ring->next_to_use, rx_ring->next_to_clean);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000341
Bruce Allanaf667a22010-12-31 06:10:01 +0000342 /* Print Rx Ring */
Taku Izumi84f4ee92010-04-27 14:39:08 +0000343 if (!netif_msg_rx_status(adapter))
Bruce Allanfe1e9802012-01-31 06:37:54 +0000344 return;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000345
Bruce Allanaf667a22010-12-31 06:10:01 +0000346 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000347 switch (adapter->rx_ps_pages) {
348 case 1:
349 case 2:
350 case 3:
351 /* [Extended] Packet Split Receive Descriptor Format
352 *
353 * +-----------------------------------------------------+
354 * 0 | Buffer Address 0 [63:0] |
355 * +-----------------------------------------------------+
356 * 8 | Buffer Address 1 [63:0] |
357 * +-----------------------------------------------------+
358 * 16 | Buffer Address 2 [63:0] |
359 * +-----------------------------------------------------+
360 * 24 | Buffer Address 3 [63:0] |
361 * +-----------------------------------------------------+
362 */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000363 pr_info("R [desc] [buffer 0 63:0 ] [buffer 1 63:0 ] [buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma ] [bi->skb] <-- Ext Pkt Split format\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000364 /* [Extended] Receive Descriptor (Write-Back) Format
365 *
366 * 63 48 47 32 31 13 12 8 7 4 3 0
367 * +------------------------------------------------------+
368 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS |
369 * | Checksum | Ident | | Queue | | Type |
370 * +------------------------------------------------------+
371 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
372 * +------------------------------------------------------+
373 * 63 48 47 32 31 20 19 0
374 */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000375 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
Taku Izumi84f4ee92010-04-27 14:39:08 +0000376 for (i = 0; i < rx_ring->count; i++) {
Jeff Kirsheref456f82011-11-03 11:40:28 +0000377 const char *next_desc;
Taku Izumi84f4ee92010-04-27 14:39:08 +0000378 buffer_info = &rx_ring->buffer_info[i];
379 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
380 u1 = (struct my_u1 *)rx_desc_ps;
381 staterr =
Bruce Allanaf667a22010-12-31 06:10:01 +0000382 le32_to_cpu(rx_desc_ps->wb.middle.status_error);
Jeff Kirsheref456f82011-11-03 11:40:28 +0000383
384 if (i == rx_ring->next_to_use)
385 next_desc = " NTU";
386 else if (i == rx_ring->next_to_clean)
387 next_desc = " NTC";
388 else
389 next_desc = "";
390
Taku Izumi84f4ee92010-04-27 14:39:08 +0000391 if (staterr & E1000_RXD_STAT_DD) {
392 /* Descriptor Done */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000393 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n",
394 "RWB", i,
395 (unsigned long long)le64_to_cpu(u1->a),
396 (unsigned long long)le64_to_cpu(u1->b),
397 (unsigned long long)le64_to_cpu(u1->c),
398 (unsigned long long)le64_to_cpu(u1->d),
399 buffer_info->skb, next_desc);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000400 } else {
Jeff Kirsheref456f82011-11-03 11:40:28 +0000401 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n",
402 "R ", i,
403 (unsigned long long)le64_to_cpu(u1->a),
404 (unsigned long long)le64_to_cpu(u1->b),
405 (unsigned long long)le64_to_cpu(u1->c),
406 (unsigned long long)le64_to_cpu(u1->d),
407 (unsigned long long)buffer_info->dma,
408 buffer_info->skb, next_desc);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000409
410 if (netif_msg_pktdata(adapter))
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000411 e1000e_dump_ps_pages(adapter,
412 buffer_info);
Taku Izumi84f4ee92010-04-27 14:39:08 +0000413 }
Taku Izumi84f4ee92010-04-27 14:39:08 +0000414 }
415 break;
416 default:
417 case 0:
Bruce Allan5f450212011-07-22 06:21:46 +0000418 /* Extended Receive Descriptor (Read) Format
Taku Izumi84f4ee92010-04-27 14:39:08 +0000419 *
Bruce Allan5f450212011-07-22 06:21:46 +0000420 * +-----------------------------------------------------+
421 * 0 | Buffer Address [63:0] |
422 * +-----------------------------------------------------+
423 * 8 | Reserved |
424 * +-----------------------------------------------------+
Taku Izumi84f4ee92010-04-27 14:39:08 +0000425 */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000426 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n");
Bruce Allan5f450212011-07-22 06:21:46 +0000427 /* Extended Receive Descriptor (Write-Back) Format
428 *
429 * 63 48 47 32 31 24 23 4 3 0
430 * +------------------------------------------------------+
431 * | RSS Hash | | | |
432 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS |
433 * | Packet | IP | | | Type |
434 * | Checksum | Ident | | | |
435 * +------------------------------------------------------+
436 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
437 * +------------------------------------------------------+
438 * 63 48 47 32 31 20 19 0
439 */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000440 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n");
Bruce Allan5f450212011-07-22 06:21:46 +0000441
442 for (i = 0; i < rx_ring->count; i++) {
Jeff Kirsheref456f82011-11-03 11:40:28 +0000443 const char *next_desc;
444
Taku Izumi84f4ee92010-04-27 14:39:08 +0000445 buffer_info = &rx_ring->buffer_info[i];
Bruce Allan5f450212011-07-22 06:21:46 +0000446 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
447 u1 = (struct my_u1 *)rx_desc;
448 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
Jeff Kirsheref456f82011-11-03 11:40:28 +0000449
450 if (i == rx_ring->next_to_use)
451 next_desc = " NTU";
452 else if (i == rx_ring->next_to_clean)
453 next_desc = " NTC";
454 else
455 next_desc = "";
456
Bruce Allan5f450212011-07-22 06:21:46 +0000457 if (staterr & E1000_RXD_STAT_DD) {
458 /* Descriptor Done */
Jeff Kirsheref456f82011-11-03 11:40:28 +0000459 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n",
460 "RWB", i,
461 (unsigned long long)le64_to_cpu(u1->a),
462 (unsigned long long)le64_to_cpu(u1->b),
463 buffer_info->skb, next_desc);
Bruce Allan5f450212011-07-22 06:21:46 +0000464 } else {
Jeff Kirsheref456f82011-11-03 11:40:28 +0000465 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n",
466 "R ", i,
467 (unsigned long long)le64_to_cpu(u1->a),
468 (unsigned long long)le64_to_cpu(u1->b),
469 (unsigned long long)buffer_info->dma,
470 buffer_info->skb, next_desc);
Bruce Allan5f450212011-07-22 06:21:46 +0000471
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000472 if (netif_msg_pktdata(adapter) &&
473 buffer_info->skb)
Bruce Allan5f450212011-07-22 06:21:46 +0000474 print_hex_dump(KERN_INFO, "",
475 DUMP_PREFIX_ADDRESS, 16,
476 1,
Emil Tantilovf0c5dad2012-08-01 08:12:21 +0000477 buffer_info->skb->data,
Bruce Allan5f450212011-07-22 06:21:46 +0000478 adapter->rx_buffer_len,
479 true);
480 }
Taku Izumi84f4ee92010-04-27 14:39:08 +0000481 }
482 }
Taku Izumi84f4ee92010-04-27 14:39:08 +0000483}
484
Auke Kokbc7f75f2007-09-17 12:30:59 -0700485/**
486 * e1000_desc_unused - calculate if we have unused descriptors
487 **/
488static int e1000_desc_unused(struct e1000_ring *ring)
489{
490 if (ring->next_to_clean > ring->next_to_use)
491 return ring->next_to_clean - ring->next_to_use - 1;
492
493 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
494}
495
496/**
Bruce Allanb67e1912012-12-27 08:32:33 +0000497 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp
498 * @adapter: board private structure
499 * @hwtstamps: time stamp structure to update
500 * @systim: unsigned 64bit system time value.
501 *
502 * Convert the system time value stored in the RX/TXSTMP registers into a
503 * hwtstamp which can be used by the upper level time stamping functions.
504 *
505 * The 'systim_lock' spinlock is used to protect the consistency of the
506 * system time value. This is needed because reading the 64 bit time
507 * value involves reading two 32 bit registers. The first read latches the
508 * value.
509 **/
510static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter,
511 struct skb_shared_hwtstamps *hwtstamps,
512 u64 systim)
513{
514 u64 ns;
515 unsigned long flags;
516
517 spin_lock_irqsave(&adapter->systim_lock, flags);
518 ns = timecounter_cyc2time(&adapter->tc, systim);
519 spin_unlock_irqrestore(&adapter->systim_lock, flags);
520
521 memset(hwtstamps, 0, sizeof(*hwtstamps));
522 hwtstamps->hwtstamp = ns_to_ktime(ns);
523}
524
525/**
526 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp
527 * @adapter: board private structure
528 * @status: descriptor extended error and status field
529 * @skb: particular skb to include time stamp
530 *
531 * If the time stamp is valid, convert it into the timecounter ns value
532 * and store that result into the shhwtstamps structure which is passed
533 * up the network stack.
534 **/
535static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status,
536 struct sk_buff *skb)
537{
538 struct e1000_hw *hw = &adapter->hw;
539 u64 rxstmp;
540
541 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) ||
542 !(status & E1000_RXDEXT_STATERR_TST) ||
543 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
544 return;
545
546 /* The Rx time stamp registers contain the time stamp. No other
547 * received packet will be time stamped until the Rx time stamp
548 * registers are read. Because only one packet can be time stamped
549 * at a time, the register values must belong to this packet and
550 * therefore none of the other additional attributes need to be
551 * compared.
552 */
553 rxstmp = (u64)er32(RXSTMPL);
554 rxstmp |= (u64)er32(RXSTMPH) << 32;
555 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp);
556
557 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP;
558}
559
560/**
Bruce Allanad680762008-03-28 09:15:03 -0700561 * e1000_receive_skb - helper function to handle Rx indications
Auke Kokbc7f75f2007-09-17 12:30:59 -0700562 * @adapter: board private structure
Bruce Allanb67e1912012-12-27 08:32:33 +0000563 * @staterr: descriptor extended error and status field as written by hardware
Auke Kokbc7f75f2007-09-17 12:30:59 -0700564 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
565 * @skb: pointer to sk_buff to be indicated to stack
566 **/
567static void e1000_receive_skb(struct e1000_adapter *adapter,
Bruce Allanaf667a22010-12-31 06:10:01 +0000568 struct net_device *netdev, struct sk_buff *skb,
Bruce Allanb67e1912012-12-27 08:32:33 +0000569 u32 staterr, __le16 vlan)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700570{
Jeff Kirsher86d70e52011-03-25 16:01:01 +0000571 u16 tag = le16_to_cpu(vlan);
Bruce Allanb67e1912012-12-27 08:32:33 +0000572
573 e1000e_rx_hwtstamp(adapter, staterr, skb);
574
Auke Kokbc7f75f2007-09-17 12:30:59 -0700575 skb->protocol = eth_type_trans(skb, netdev);
576
Bruce Allanb67e1912012-12-27 08:32:33 +0000577 if (staterr & E1000_RXD_STAT_VP)
Patrick McHardy86a9bad2013-04-19 02:04:30 +0000578 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
Jeff Kirsher86d70e52011-03-25 16:01:01 +0000579
580 napi_gro_receive(&adapter->napi, skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700581}
582
583/**
Bruce Allanaf667a22010-12-31 06:10:01 +0000584 * e1000_rx_checksum - Receive Checksum Offload
Bruce Allanafd12932012-01-05 00:34:05 +0000585 * @adapter: board private structure
586 * @status_err: receive descriptor status and error fields
587 * @csum: receive descriptor csum field
588 * @sk_buff: socket buffer with received data
Auke Kokbc7f75f2007-09-17 12:30:59 -0700589 **/
590static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
Bruce Allan2e1706f2012-06-30 20:02:42 +0000591 struct sk_buff *skb)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700592{
593 u16 status = (u16)status_err;
594 u8 errors = (u8)(status_err >> 24);
Eric Dumazetbc8acf22010-09-02 13:07:41 -0700595
596 skb_checksum_none_assert(skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700597
Bruce Allanafd12932012-01-05 00:34:05 +0000598 /* Rx checksum disabled */
599 if (!(adapter->netdev->features & NETIF_F_RXCSUM))
600 return;
601
Auke Kokbc7f75f2007-09-17 12:30:59 -0700602 /* Ignore Checksum bit is set */
603 if (status & E1000_RXD_STAT_IXSM)
604 return;
Bruce Allanafd12932012-01-05 00:34:05 +0000605
Bruce Allan2e1706f2012-06-30 20:02:42 +0000606 /* TCP/UDP checksum error bit or IP checksum error bit is set */
607 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700608 /* let the stack verify checksum errors */
609 adapter->hw_csum_err++;
610 return;
611 }
612
613 /* TCP/UDP Checksum has not been calculated */
614 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
615 return;
616
617 /* It must be a TCP or UDP packet with a valid checksum */
Bruce Allan2e1706f2012-06-30 20:02:42 +0000618 skb->ip_summed = CHECKSUM_UNNECESSARY;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700619 adapter->hw_csum_good++;
620}
621
Bruce Allan55aa6982011-12-16 00:45:45 +0000622static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
David S. Miller823dcd22011-08-20 10:39:12 -0700623{
Bruce Allan55aa6982011-12-16 00:45:45 +0000624 struct e1000_adapter *adapter = rx_ring->adapter;
David S. Miller823dcd22011-08-20 10:39:12 -0700625 struct e1000_hw *hw = &adapter->hw;
Bruce Allanbdc125f2012-03-20 03:47:52 +0000626 s32 ret_val = __ew32_prepare(hw);
David S. Miller823dcd22011-08-20 10:39:12 -0700627
Bruce Allanbdc125f2012-03-20 03:47:52 +0000628 writel(i, rx_ring->tail);
629
630 if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
David S. Miller823dcd22011-08-20 10:39:12 -0700631 u32 rctl = er32(RCTL);
David Ertman6cf08d12014-04-05 06:07:00 +0000632
David S. Miller823dcd22011-08-20 10:39:12 -0700633 ew32(RCTL, rctl & ~E1000_RCTL_EN);
634 e_err("ME firmware caused invalid RDT - resetting\n");
635 schedule_work(&adapter->reset_task);
636 }
637}
638
Bruce Allan55aa6982011-12-16 00:45:45 +0000639static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
David S. Miller823dcd22011-08-20 10:39:12 -0700640{
Bruce Allan55aa6982011-12-16 00:45:45 +0000641 struct e1000_adapter *adapter = tx_ring->adapter;
David S. Miller823dcd22011-08-20 10:39:12 -0700642 struct e1000_hw *hw = &adapter->hw;
Bruce Allanbdc125f2012-03-20 03:47:52 +0000643 s32 ret_val = __ew32_prepare(hw);
David S. Miller823dcd22011-08-20 10:39:12 -0700644
Bruce Allanbdc125f2012-03-20 03:47:52 +0000645 writel(i, tx_ring->tail);
646
647 if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
David S. Miller823dcd22011-08-20 10:39:12 -0700648 u32 tctl = er32(TCTL);
David Ertman6cf08d12014-04-05 06:07:00 +0000649
David S. Miller823dcd22011-08-20 10:39:12 -0700650 ew32(TCTL, tctl & ~E1000_TCTL_EN);
651 e_err("ME firmware caused invalid TDT - resetting\n");
652 schedule_work(&adapter->reset_task);
653 }
654}
655
656/**
Bruce Allan5f450212011-07-22 06:21:46 +0000657 * e1000_alloc_rx_buffers - Replace used receive buffers
Bruce Allan55aa6982011-12-16 00:45:45 +0000658 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -0700659 **/
Bruce Allan55aa6982011-12-16 00:45:45 +0000660static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000661 int cleaned_count, gfp_t gfp)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700662{
Bruce Allan55aa6982011-12-16 00:45:45 +0000663 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700664 struct net_device *netdev = adapter->netdev;
665 struct pci_dev *pdev = adapter->pdev;
Bruce Allan5f450212011-07-22 06:21:46 +0000666 union e1000_rx_desc_extended *rx_desc;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700667 struct e1000_buffer *buffer_info;
668 struct sk_buff *skb;
669 unsigned int i;
Eric Dumazet89d71a62009-10-13 05:34:20 +0000670 unsigned int bufsz = adapter->rx_buffer_len;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700671
672 i = rx_ring->next_to_use;
673 buffer_info = &rx_ring->buffer_info[i];
674
675 while (cleaned_count--) {
676 skb = buffer_info->skb;
677 if (skb) {
678 skb_trim(skb, 0);
679 goto map_skb;
680 }
681
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000682 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700683 if (!skb) {
684 /* Better luck next round */
685 adapter->alloc_rx_buff_failed++;
686 break;
687 }
688
Auke Kokbc7f75f2007-09-17 12:30:59 -0700689 buffer_info->skb = skb;
690map_skb:
Nick Nunley0be3f552010-04-27 13:09:05 +0000691 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
Auke Kokbc7f75f2007-09-17 12:30:59 -0700692 adapter->rx_buffer_len,
Nick Nunley0be3f552010-04-27 13:09:05 +0000693 DMA_FROM_DEVICE);
694 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
Bruce Allanaf667a22010-12-31 06:10:01 +0000695 dev_err(&pdev->dev, "Rx DMA map failed\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -0700696 adapter->rx_dma_failed++;
697 break;
698 }
699
Bruce Allan5f450212011-07-22 06:21:46 +0000700 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
701 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700702
Tom Herbert50849d72010-05-05 14:02:49 +0000703 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
Bruce Allane921eb12012-11-28 09:28:37 +0000704 /* Force memory writes to complete before letting h/w
Tom Herbert50849d72010-05-05 14:02:49 +0000705 * know there are new descriptors to fetch. (Only
706 * applicable for weak-ordered memory model archs,
707 * such as IA-64).
708 */
709 wmb();
David S. Miller823dcd22011-08-20 10:39:12 -0700710 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allan55aa6982011-12-16 00:45:45 +0000711 e1000e_update_rdt_wa(rx_ring, i);
David S. Miller823dcd22011-08-20 10:39:12 -0700712 else
Bruce Allanc5083cf2011-12-16 00:45:40 +0000713 writel(i, rx_ring->tail);
Tom Herbert50849d72010-05-05 14:02:49 +0000714 }
Auke Kokbc7f75f2007-09-17 12:30:59 -0700715 i++;
716 if (i == rx_ring->count)
717 i = 0;
718 buffer_info = &rx_ring->buffer_info[i];
719 }
720
Tom Herbert50849d72010-05-05 14:02:49 +0000721 rx_ring->next_to_use = i;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700722}
723
724/**
725 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
Bruce Allan55aa6982011-12-16 00:45:45 +0000726 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -0700727 **/
Bruce Allan55aa6982011-12-16 00:45:45 +0000728static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000729 int cleaned_count, gfp_t gfp)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700730{
Bruce Allan55aa6982011-12-16 00:45:45 +0000731 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700732 struct net_device *netdev = adapter->netdev;
733 struct pci_dev *pdev = adapter->pdev;
734 union e1000_rx_desc_packet_split *rx_desc;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700735 struct e1000_buffer *buffer_info;
736 struct e1000_ps_page *ps_page;
737 struct sk_buff *skb;
738 unsigned int i, j;
739
740 i = rx_ring->next_to_use;
741 buffer_info = &rx_ring->buffer_info[i];
742
743 while (cleaned_count--) {
744 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
745
746 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
Auke Kok47f44e42007-10-25 13:57:44 -0700747 ps_page = &buffer_info->ps_pages[j];
748 if (j >= adapter->rx_ps_pages) {
749 /* all unused desc entries get hw null ptr */
Bruce Allanaf667a22010-12-31 06:10:01 +0000750 rx_desc->read.buffer_addr[j + 1] =
751 ~cpu_to_le64(0);
Auke Kok47f44e42007-10-25 13:57:44 -0700752 continue;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700753 }
Auke Kok47f44e42007-10-25 13:57:44 -0700754 if (!ps_page->page) {
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000755 ps_page->page = alloc_page(gfp);
Auke Kok47f44e42007-10-25 13:57:44 -0700756 if (!ps_page->page) {
757 adapter->alloc_rx_buff_failed++;
758 goto no_buffers;
759 }
Nick Nunley0be3f552010-04-27 13:09:05 +0000760 ps_page->dma = dma_map_page(&pdev->dev,
761 ps_page->page,
762 0, PAGE_SIZE,
763 DMA_FROM_DEVICE);
764 if (dma_mapping_error(&pdev->dev,
765 ps_page->dma)) {
Auke Kok47f44e42007-10-25 13:57:44 -0700766 dev_err(&adapter->pdev->dev,
Bruce Allanaf667a22010-12-31 06:10:01 +0000767 "Rx DMA page map failed\n");
Auke Kok47f44e42007-10-25 13:57:44 -0700768 adapter->rx_dma_failed++;
769 goto no_buffers;
770 }
771 }
Bruce Allane921eb12012-11-28 09:28:37 +0000772 /* Refresh the desc even if buffer_addrs
Auke Kok47f44e42007-10-25 13:57:44 -0700773 * didn't change because each write-back
774 * erases this info.
775 */
Bruce Allanaf667a22010-12-31 06:10:01 +0000776 rx_desc->read.buffer_addr[j + 1] =
777 cpu_to_le64(ps_page->dma);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700778 }
779
Bruce Allane5fe2542013-02-20 04:06:27 +0000780 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0,
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000781 gfp);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700782
783 if (!skb) {
784 adapter->alloc_rx_buff_failed++;
785 break;
786 }
787
Auke Kokbc7f75f2007-09-17 12:30:59 -0700788 buffer_info->skb = skb;
Nick Nunley0be3f552010-04-27 13:09:05 +0000789 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
Auke Kokbc7f75f2007-09-17 12:30:59 -0700790 adapter->rx_ps_bsize0,
Nick Nunley0be3f552010-04-27 13:09:05 +0000791 DMA_FROM_DEVICE);
792 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
Bruce Allanaf667a22010-12-31 06:10:01 +0000793 dev_err(&pdev->dev, "Rx DMA map failed\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -0700794 adapter->rx_dma_failed++;
795 /* cleanup skb */
796 dev_kfree_skb_any(skb);
797 buffer_info->skb = NULL;
798 break;
799 }
800
801 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
802
Tom Herbert50849d72010-05-05 14:02:49 +0000803 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
Bruce Allane921eb12012-11-28 09:28:37 +0000804 /* Force memory writes to complete before letting h/w
Tom Herbert50849d72010-05-05 14:02:49 +0000805 * know there are new descriptors to fetch. (Only
806 * applicable for weak-ordered memory model archs,
807 * such as IA-64).
808 */
809 wmb();
David S. Miller823dcd22011-08-20 10:39:12 -0700810 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allan55aa6982011-12-16 00:45:45 +0000811 e1000e_update_rdt_wa(rx_ring, i << 1);
David S. Miller823dcd22011-08-20 10:39:12 -0700812 else
Bruce Allanc5083cf2011-12-16 00:45:40 +0000813 writel(i << 1, rx_ring->tail);
Tom Herbert50849d72010-05-05 14:02:49 +0000814 }
815
Auke Kokbc7f75f2007-09-17 12:30:59 -0700816 i++;
817 if (i == rx_ring->count)
818 i = 0;
819 buffer_info = &rx_ring->buffer_info[i];
820 }
821
822no_buffers:
Tom Herbert50849d72010-05-05 14:02:49 +0000823 rx_ring->next_to_use = i;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700824}
825
826/**
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700827 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
Bruce Allan55aa6982011-12-16 00:45:45 +0000828 * @rx_ring: Rx descriptor ring
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700829 * @cleaned_count: number of buffers to allocate this pass
830 **/
831
Bruce Allan55aa6982011-12-16 00:45:45 +0000832static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000833 int cleaned_count, gfp_t gfp)
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700834{
Bruce Allan55aa6982011-12-16 00:45:45 +0000835 struct e1000_adapter *adapter = rx_ring->adapter;
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700836 struct net_device *netdev = adapter->netdev;
837 struct pci_dev *pdev = adapter->pdev;
Bruce Allan5f450212011-07-22 06:21:46 +0000838 union e1000_rx_desc_extended *rx_desc;
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700839 struct e1000_buffer *buffer_info;
840 struct sk_buff *skb;
841 unsigned int i;
Bruce Allan2a2293b2012-12-05 06:26:35 +0000842 unsigned int bufsz = 256 - 16; /* for skb_reserve */
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700843
844 i = rx_ring->next_to_use;
845 buffer_info = &rx_ring->buffer_info[i];
846
847 while (cleaned_count--) {
848 skb = buffer_info->skb;
849 if (skb) {
850 skb_trim(skb, 0);
851 goto check_page;
852 }
853
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000854 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700855 if (unlikely(!skb)) {
856 /* Better luck next round */
857 adapter->alloc_rx_buff_failed++;
858 break;
859 }
860
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700861 buffer_info->skb = skb;
862check_page:
863 /* allocate a new page if necessary */
864 if (!buffer_info->page) {
Jeff Kirsherc2fed992011-07-12 16:10:12 +0000865 buffer_info->page = alloc_page(gfp);
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700866 if (unlikely(!buffer_info->page)) {
867 adapter->alloc_rx_buff_failed++;
868 break;
869 }
870 }
871
Christoph Paasch37287fae2013-03-20 08:59:46 +0000872 if (!buffer_info->dma) {
Nick Nunley0be3f552010-04-27 13:09:05 +0000873 buffer_info->dma = dma_map_page(&pdev->dev,
Bruce Allanf0ff4392013-02-20 04:05:39 +0000874 buffer_info->page, 0,
875 PAGE_SIZE,
Nick Nunley0be3f552010-04-27 13:09:05 +0000876 DMA_FROM_DEVICE);
Christoph Paasch37287fae2013-03-20 08:59:46 +0000877 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
878 adapter->alloc_rx_buff_failed++;
879 break;
880 }
881 }
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700882
Bruce Allan5f450212011-07-22 06:21:46 +0000883 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
884 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700885
886 if (unlikely(++i == rx_ring->count))
887 i = 0;
888 buffer_info = &rx_ring->buffer_info[i];
889 }
890
891 if (likely(rx_ring->next_to_use != i)) {
892 rx_ring->next_to_use = i;
893 if (unlikely(i-- == 0))
894 i = (rx_ring->count - 1);
895
896 /* Force memory writes to complete before letting h/w
897 * know there are new descriptors to fetch. (Only
898 * applicable for weak-ordered memory model archs,
Bruce Allane921eb12012-11-28 09:28:37 +0000899 * such as IA-64).
900 */
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700901 wmb();
David S. Miller823dcd22011-08-20 10:39:12 -0700902 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allan55aa6982011-12-16 00:45:45 +0000903 e1000e_update_rdt_wa(rx_ring, i);
David S. Miller823dcd22011-08-20 10:39:12 -0700904 else
Bruce Allanc5083cf2011-12-16 00:45:40 +0000905 writel(i, rx_ring->tail);
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700906 }
907}
908
Bruce Allan70495a52012-01-11 01:26:50 +0000909static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
910 struct sk_buff *skb)
911{
912 if (netdev->features & NETIF_F_RXHASH)
Tom Herberte25909b2013-12-18 16:46:48 +0000913 skb_set_hash(skb, le32_to_cpu(rss), PKT_HASH_TYPE_L3);
Bruce Allan70495a52012-01-11 01:26:50 +0000914}
915
Bruce Allan97ac8ca2008-04-29 09:16:05 -0700916/**
Bruce Allan55aa6982011-12-16 00:45:45 +0000917 * e1000_clean_rx_irq - Send received data up the network stack
918 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -0700919 *
920 * the return value indicates whether actual cleaning was done, there
921 * is no guarantee that everything was cleaned
922 **/
Bruce Allan55aa6982011-12-16 00:45:45 +0000923static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
924 int work_to_do)
Auke Kokbc7f75f2007-09-17 12:30:59 -0700925{
Bruce Allan55aa6982011-12-16 00:45:45 +0000926 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700927 struct net_device *netdev = adapter->netdev;
928 struct pci_dev *pdev = adapter->pdev;
Bruce Allan3bb99fe2009-11-20 23:25:07 +0000929 struct e1000_hw *hw = &adapter->hw;
Bruce Allan5f450212011-07-22 06:21:46 +0000930 union e1000_rx_desc_extended *rx_desc, *next_rxd;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700931 struct e1000_buffer *buffer_info, *next_buffer;
Bruce Allan5f450212011-07-22 06:21:46 +0000932 u32 length, staterr;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700933 unsigned int i;
934 int cleaned_count = 0;
Rusty Russell3db1cd52011-12-19 13:56:45 +0000935 bool cleaned = false;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700936 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
937
938 i = rx_ring->next_to_clean;
Bruce Allan5f450212011-07-22 06:21:46 +0000939 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
940 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700941 buffer_info = &rx_ring->buffer_info[i];
942
Bruce Allan5f450212011-07-22 06:21:46 +0000943 while (staterr & E1000_RXD_STAT_DD) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700944 struct sk_buff *skb;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700945
946 if (*work_done >= work_to_do)
947 break;
948 (*work_done)++;
Jeff Kirsher2d0bb1c2010-08-08 16:02:31 +0000949 rmb(); /* read descriptor and rx_buffer_info after status DD */
Auke Kokbc7f75f2007-09-17 12:30:59 -0700950
Auke Kokbc7f75f2007-09-17 12:30:59 -0700951 skb = buffer_info->skb;
952 buffer_info->skb = NULL;
953
954 prefetch(skb->data - NET_IP_ALIGN);
955
956 i++;
957 if (i == rx_ring->count)
958 i = 0;
Bruce Allan5f450212011-07-22 06:21:46 +0000959 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700960 prefetch(next_rxd);
961
962 next_buffer = &rx_ring->buffer_info[i];
963
Rusty Russell3db1cd52011-12-19 13:56:45 +0000964 cleaned = true;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700965 cleaned_count++;
Bruce Allane5fe2542013-02-20 04:06:27 +0000966 dma_unmap_single(&pdev->dev, buffer_info->dma,
967 adapter->rx_buffer_len, DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700968 buffer_info->dma = 0;
969
Bruce Allan5f450212011-07-22 06:21:46 +0000970 length = le16_to_cpu(rx_desc->wb.upper.length);
Auke Kokbc7f75f2007-09-17 12:30:59 -0700971
Bruce Allane921eb12012-11-28 09:28:37 +0000972 /* !EOP means multiple descriptors were used to store a single
Jesse Brandeburgb94b5022010-01-19 14:15:59 +0000973 * packet, if that's the case we need to toss it. In fact, we
974 * need to toss every packet with the EOP bit clear and the
975 * next frame that _does_ have the EOP bit set, as it is by
976 * definition only a frame fragment
977 */
Bruce Allan5f450212011-07-22 06:21:46 +0000978 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
Jesse Brandeburgb94b5022010-01-19 14:15:59 +0000979 adapter->flags2 |= FLAG2_IS_DISCARDING;
980
981 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700982 /* All receives must fit into a single buffer */
Bruce Allan3bb99fe2009-11-20 23:25:07 +0000983 e_dbg("Receive packet consumed multiple buffers\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -0700984 /* recycle */
985 buffer_info->skb = skb;
Bruce Allan5f450212011-07-22 06:21:46 +0000986 if (staterr & E1000_RXD_STAT_EOP)
Jesse Brandeburgb94b5022010-01-19 14:15:59 +0000987 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
Auke Kokbc7f75f2007-09-17 12:30:59 -0700988 goto next_desc;
989 }
990
Ben Greearcf955e62012-02-11 15:39:51 +0000991 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
992 !(netdev->features & NETIF_F_RXALL))) {
Auke Kokbc7f75f2007-09-17 12:30:59 -0700993 /* recycle */
994 buffer_info->skb = skb;
995 goto next_desc;
996 }
997
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +0000998 /* adjust length to remove Ethernet CRC */
Ben Greear01840392012-02-11 15:39:25 +0000999 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1000 /* If configured to store CRC, don't subtract FCS,
1001 * but keep the FCS bytes out of the total_rx_bytes
1002 * counter
1003 */
1004 if (netdev->features & NETIF_F_RXFCS)
1005 total_rx_bytes -= 4;
1006 else
1007 length -= 4;
1008 }
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00001009
Auke Kokbc7f75f2007-09-17 12:30:59 -07001010 total_rx_bytes += length;
1011 total_rx_packets++;
1012
Bruce Allane921eb12012-11-28 09:28:37 +00001013 /* code added for copybreak, this should improve
Auke Kokbc7f75f2007-09-17 12:30:59 -07001014 * performance for small packets with large amounts
Bruce Allanad680762008-03-28 09:15:03 -07001015 * of reassembly being done in the stack
1016 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001017 if (length < copybreak) {
1018 struct sk_buff *new_skb =
Eric Dumazet89d71a62009-10-13 05:34:20 +00001019 netdev_alloc_skb_ip_align(netdev, length);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001020 if (new_skb) {
Bruce Allan808ff672008-08-08 18:35:56 -07001021 skb_copy_to_linear_data_offset(new_skb,
1022 -NET_IP_ALIGN,
1023 (skb->data -
1024 NET_IP_ALIGN),
1025 (length +
1026 NET_IP_ALIGN));
Auke Kokbc7f75f2007-09-17 12:30:59 -07001027 /* save the skb in buffer_info as good */
1028 buffer_info->skb = skb;
1029 skb = new_skb;
1030 }
1031 /* else just continue with the old one */
1032 }
1033 /* end copybreak code */
1034 skb_put(skb, length);
1035
1036 /* Receive Checksum Offload */
Bruce Allan2e1706f2012-06-30 20:02:42 +00001037 e1000_rx_checksum(adapter, staterr, skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001038
Bruce Allan70495a52012-01-11 01:26:50 +00001039 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1040
Bruce Allan5f450212011-07-22 06:21:46 +00001041 e1000_receive_skb(adapter, netdev, skb, staterr,
1042 rx_desc->wb.upper.vlan);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001043
1044next_desc:
Bruce Allan5f450212011-07-22 06:21:46 +00001045 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001046
1047 /* return some buffers to hardware, one at a time is too slow */
1048 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
Bruce Allan55aa6982011-12-16 00:45:45 +00001049 adapter->alloc_rx_buf(rx_ring, cleaned_count,
Jeff Kirsherc2fed992011-07-12 16:10:12 +00001050 GFP_ATOMIC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001051 cleaned_count = 0;
1052 }
1053
1054 /* use prefetched values */
1055 rx_desc = next_rxd;
1056 buffer_info = next_buffer;
Bruce Allan5f450212011-07-22 06:21:46 +00001057
1058 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001059 }
1060 rx_ring->next_to_clean = i;
1061
1062 cleaned_count = e1000_desc_unused(rx_ring);
1063 if (cleaned_count)
Bruce Allan55aa6982011-12-16 00:45:45 +00001064 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001065
Auke Kokbc7f75f2007-09-17 12:30:59 -07001066 adapter->total_rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -07001067 adapter->total_rx_packets += total_rx_packets;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001068 return cleaned;
1069}
1070
Bruce Allan55aa6982011-12-16 00:45:45 +00001071static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1072 struct e1000_buffer *buffer_info)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001073{
Bruce Allan55aa6982011-12-16 00:45:45 +00001074 struct e1000_adapter *adapter = tx_ring->adapter;
1075
Alexander Duyck03b13202009-12-02 16:45:31 +00001076 if (buffer_info->dma) {
1077 if (buffer_info->mapped_as_page)
Nick Nunley0be3f552010-04-27 13:09:05 +00001078 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1079 buffer_info->length, DMA_TO_DEVICE);
Alexander Duyck03b13202009-12-02 16:45:31 +00001080 else
Nick Nunley0be3f552010-04-27 13:09:05 +00001081 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1082 buffer_info->length, DMA_TO_DEVICE);
Alexander Duyck03b13202009-12-02 16:45:31 +00001083 buffer_info->dma = 0;
1084 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07001085 if (buffer_info->skb) {
1086 dev_kfree_skb_any(buffer_info->skb);
1087 buffer_info->skb = NULL;
1088 }
Alexander Duyck1b7719c2009-03-19 01:12:50 +00001089 buffer_info->time_stamp = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001090}
1091
Bruce Allan41cec6f2009-11-20 23:28:56 +00001092static void e1000_print_hw_hang(struct work_struct *work)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001093{
Bruce Allan41cec6f2009-11-20 23:28:56 +00001094 struct e1000_adapter *adapter = container_of(work,
Bruce Allanf0ff4392013-02-20 04:05:39 +00001095 struct e1000_adapter,
1096 print_hang_task);
Jeff Kirsher09357b02011-11-18 14:25:00 +00001097 struct net_device *netdev = adapter->netdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001098 struct e1000_ring *tx_ring = adapter->tx_ring;
1099 unsigned int i = tx_ring->next_to_clean;
1100 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1101 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
Bruce Allan41cec6f2009-11-20 23:28:56 +00001102 struct e1000_hw *hw = &adapter->hw;
1103 u16 phy_status, phy_1000t_status, phy_ext_status;
1104 u16 pci_status;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001105
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00001106 if (test_bit(__E1000_DOWN, &adapter->state))
1107 return;
1108
Bruce Allane5fe2542013-02-20 04:06:27 +00001109 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) {
Bruce Allane921eb12012-11-28 09:28:37 +00001110 /* May be block on write-back, flush and detect again
Jeff Kirsher09357b02011-11-18 14:25:00 +00001111 * flush pending descriptor writebacks to memory
1112 */
1113 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1114 /* execute the writes immediately */
1115 e1e_flush();
Bruce Allane921eb12012-11-28 09:28:37 +00001116 /* Due to rare timing issues, write to TIDV again to ensure
Matthew Vickbf030852012-03-16 09:03:00 +00001117 * the write is successful
1118 */
1119 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1120 /* execute the writes immediately */
1121 e1e_flush();
Jeff Kirsher09357b02011-11-18 14:25:00 +00001122 adapter->tx_hang_recheck = true;
1123 return;
1124 }
Jeff Kirsher09357b02011-11-18 14:25:00 +00001125 adapter->tx_hang_recheck = false;
David Ertmand9554e92014-01-08 01:07:55 +00001126
1127 if (er32(TDH(0)) == er32(TDT(0))) {
1128 e_dbg("false hang detected, ignoring\n");
1129 return;
1130 }
1131
1132 /* Real hang detected */
Jeff Kirsher09357b02011-11-18 14:25:00 +00001133 netif_stop_queue(netdev);
1134
Bruce Allanc2ade1a2013-01-16 08:54:35 +00001135 e1e_rphy(hw, MII_BMSR, &phy_status);
1136 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status);
1137 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status);
Bruce Allan41cec6f2009-11-20 23:28:56 +00001138
1139 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1140
1141 /* detected Hardware unit hang */
1142 e_err("Detected Hardware Unit Hang:\n"
Jeff Kirsher44defeb2008-08-04 17:20:41 -07001143 " TDH <%x>\n"
1144 " TDT <%x>\n"
1145 " next_to_use <%x>\n"
1146 " next_to_clean <%x>\n"
1147 "buffer_info[next_to_clean]:\n"
1148 " time_stamp <%lx>\n"
1149 " next_to_watch <%x>\n"
1150 " jiffies <%lx>\n"
Bruce Allan41cec6f2009-11-20 23:28:56 +00001151 " next_to_watch.status <%x>\n"
1152 "MAC Status <%x>\n"
1153 "PHY Status <%x>\n"
1154 "PHY 1000BASE-T Status <%x>\n"
1155 "PHY Extended Status <%x>\n"
1156 "PCI Status <%x>\n",
Bruce Allane5fe2542013-02-20 04:06:27 +00001157 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use,
1158 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp,
1159 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS),
1160 phy_status, phy_1000t_status, phy_ext_status, pci_status);
Bruce Allan7c0427e2012-03-20 03:48:08 +00001161
David Ertmand9554e92014-01-08 01:07:55 +00001162 e1000e_dump(adapter);
1163
Bruce Allan7c0427e2012-03-20 03:48:08 +00001164 /* Suggest workaround for known h/w issue */
1165 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1166 e_err("Try turning off Tx pause (flow control) via ethtool\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07001167}
1168
1169/**
Bruce Allanb67e1912012-12-27 08:32:33 +00001170 * e1000e_tx_hwtstamp_work - check for Tx time stamp
1171 * @work: pointer to work struct
1172 *
1173 * This work function polls the TSYNCTXCTL valid bit to determine when a
1174 * timestamp has been taken for the current stored skb. The timestamp must
1175 * be for this skb because only one such packet is allowed in the queue.
1176 */
1177static void e1000e_tx_hwtstamp_work(struct work_struct *work)
1178{
1179 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
1180 tx_hwtstamp_work);
1181 struct e1000_hw *hw = &adapter->hw;
1182
Bruce Allanb67e1912012-12-27 08:32:33 +00001183 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) {
1184 struct skb_shared_hwtstamps shhwtstamps;
1185 u64 txstmp;
1186
1187 txstmp = er32(TXSTMPL);
1188 txstmp |= (u64)er32(TXSTMPH) << 32;
1189
1190 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp);
1191
1192 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps);
1193 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1194 adapter->tx_hwtstamp_skb = NULL;
Jakub Kicinski59c871c2014-03-15 14:55:00 +00001195 } else if (time_after(jiffies, adapter->tx_hwtstamp_start
1196 + adapter->tx_timeout_factor * HZ)) {
1197 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1198 adapter->tx_hwtstamp_skb = NULL;
1199 adapter->tx_hwtstamp_timeouts++;
Jakub Kicinskic5ffe7e2014-04-02 10:33:22 +00001200 e_warn("clearing Tx timestamp hang\n");
Bruce Allanb67e1912012-12-27 08:32:33 +00001201 } else {
1202 /* reschedule to check later */
1203 schedule_work(&adapter->tx_hwtstamp_work);
1204 }
1205}
1206
1207/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07001208 * e1000_clean_tx_irq - Reclaim resources after transmit completes
Bruce Allan55aa6982011-12-16 00:45:45 +00001209 * @tx_ring: Tx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07001210 *
1211 * the return value indicates whether actual cleaning was done, there
1212 * is no guarantee that everything was cleaned
1213 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00001214static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001215{
Bruce Allan55aa6982011-12-16 00:45:45 +00001216 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001217 struct net_device *netdev = adapter->netdev;
1218 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001219 struct e1000_tx_desc *tx_desc, *eop_desc;
1220 struct e1000_buffer *buffer_info;
1221 unsigned int i, eop;
1222 unsigned int count = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001223 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
Tom Herbert3f0cfa32011-11-28 16:33:16 +00001224 unsigned int bytes_compl = 0, pkts_compl = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001225
1226 i = tx_ring->next_to_clean;
1227 eop = tx_ring->buffer_info[i].next_to_watch;
1228 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1229
Alexander Duyck12d04a32009-03-25 22:05:03 +00001230 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1231 (count < tx_ring->count)) {
Jesse Brandeburga86043c2009-04-16 16:59:28 +00001232 bool cleaned = false;
David Ertman6cf08d12014-04-05 06:07:00 +00001233
Bruce Allane80bd1d2013-05-01 01:19:46 +00001234 rmb(); /* read buffer_info after eop_desc */
Jesse Brandeburga86043c2009-04-16 16:59:28 +00001235 for (; !cleaned; count++) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001236 tx_desc = E1000_TX_DESC(*tx_ring, i);
1237 buffer_info = &tx_ring->buffer_info[i];
1238 cleaned = (i == eop);
1239
1240 if (cleaned) {
Tom Herbert9ed318d2010-05-05 14:02:27 +00001241 total_tx_packets += buffer_info->segs;
1242 total_tx_bytes += buffer_info->bytecount;
Tom Herbert3f0cfa32011-11-28 16:33:16 +00001243 if (buffer_info->skb) {
1244 bytes_compl += buffer_info->skb->len;
1245 pkts_compl++;
1246 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07001247 }
1248
Bruce Allan55aa6982011-12-16 00:45:45 +00001249 e1000_put_txbuf(tx_ring, buffer_info);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001250 tx_desc->upper.data = 0;
1251
1252 i++;
1253 if (i == tx_ring->count)
1254 i = 0;
1255 }
1256
Terry Loftindac87612010-04-09 10:29:49 +00001257 if (i == tx_ring->next_to_use)
1258 break;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001259 eop = tx_ring->buffer_info[i].next_to_watch;
1260 eop_desc = E1000_TX_DESC(*tx_ring, eop);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001261 }
1262
1263 tx_ring->next_to_clean = i;
1264
Tom Herbert3f0cfa32011-11-28 16:33:16 +00001265 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1266
Auke Kokbc7f75f2007-09-17 12:30:59 -07001267#define TX_WAKE_THRESHOLD 32
Jesse Brandeburga86043c2009-04-16 16:59:28 +00001268 if (count && netif_carrier_ok(netdev) &&
1269 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001270 /* Make sure that anybody stopping the queue after this
1271 * sees the new next_to_clean.
1272 */
1273 smp_mb();
1274
1275 if (netif_queue_stopped(netdev) &&
1276 !(test_bit(__E1000_DOWN, &adapter->state))) {
1277 netif_wake_queue(netdev);
1278 ++adapter->restart_queue;
1279 }
1280 }
1281
1282 if (adapter->detect_tx_hung) {
Bruce Allane921eb12012-11-28 09:28:37 +00001283 /* Detect a transmit hang in hardware, this serializes the
Bruce Allan41cec6f2009-11-20 23:28:56 +00001284 * check with the clearing of time_stamp and movement of i
1285 */
Rusty Russell3db1cd52011-12-19 13:56:45 +00001286 adapter->detect_tx_hung = false;
Alexander Duyck12d04a32009-03-25 22:05:03 +00001287 if (tx_ring->buffer_info[i].time_stamp &&
1288 time_after(jiffies, tx_ring->buffer_info[i].time_stamp
Joe Perches8e95a202009-12-03 07:58:21 +00001289 + (adapter->tx_timeout_factor * HZ)) &&
Jeff Kirsher09357b02011-11-18 14:25:00 +00001290 !(er32(STATUS) & E1000_STATUS_TXOFF))
Bruce Allan41cec6f2009-11-20 23:28:56 +00001291 schedule_work(&adapter->print_hang_task);
Jeff Kirsher09357b02011-11-18 14:25:00 +00001292 else
1293 adapter->tx_hang_recheck = false;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001294 }
1295 adapter->total_tx_bytes += total_tx_bytes;
1296 adapter->total_tx_packets += total_tx_packets;
Eric Dumazet807540b2010-09-23 05:40:09 +00001297 return count < tx_ring->count;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001298}
1299
1300/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07001301 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
Bruce Allan55aa6982011-12-16 00:45:45 +00001302 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07001303 *
1304 * the return value indicates whether actual cleaning was done, there
1305 * is no guarantee that everything was cleaned
1306 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00001307static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1308 int work_to_do)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001309{
Bruce Allan55aa6982011-12-16 00:45:45 +00001310 struct e1000_adapter *adapter = rx_ring->adapter;
Bruce Allan3bb99fe2009-11-20 23:25:07 +00001311 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001312 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1313 struct net_device *netdev = adapter->netdev;
1314 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001315 struct e1000_buffer *buffer_info, *next_buffer;
1316 struct e1000_ps_page *ps_page;
1317 struct sk_buff *skb;
1318 unsigned int i, j;
1319 u32 length, staterr;
1320 int cleaned_count = 0;
Rusty Russell3db1cd52011-12-19 13:56:45 +00001321 bool cleaned = false;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001322 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1323
1324 i = rx_ring->next_to_clean;
1325 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1326 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1327 buffer_info = &rx_ring->buffer_info[i];
1328
1329 while (staterr & E1000_RXD_STAT_DD) {
1330 if (*work_done >= work_to_do)
1331 break;
1332 (*work_done)++;
1333 skb = buffer_info->skb;
Jeff Kirsher2d0bb1c2010-08-08 16:02:31 +00001334 rmb(); /* read descriptor and rx_buffer_info after status DD */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001335
1336 /* in the packet split case this is header only */
1337 prefetch(skb->data - NET_IP_ALIGN);
1338
1339 i++;
1340 if (i == rx_ring->count)
1341 i = 0;
1342 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1343 prefetch(next_rxd);
1344
1345 next_buffer = &rx_ring->buffer_info[i];
1346
Rusty Russell3db1cd52011-12-19 13:56:45 +00001347 cleaned = true;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001348 cleaned_count++;
Nick Nunley0be3f552010-04-27 13:09:05 +00001349 dma_unmap_single(&pdev->dev, buffer_info->dma,
Bruce Allanaf667a22010-12-31 06:10:01 +00001350 adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001351 buffer_info->dma = 0;
1352
Bruce Allanaf667a22010-12-31 06:10:01 +00001353 /* see !EOP comment in other Rx routine */
Jesse Brandeburgb94b5022010-01-19 14:15:59 +00001354 if (!(staterr & E1000_RXD_STAT_EOP))
1355 adapter->flags2 |= FLAG2_IS_DISCARDING;
1356
1357 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
Jeff Kirsheref456f82011-11-03 11:40:28 +00001358 e_dbg("Packet Split buffers didn't pick up the full packet\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07001359 dev_kfree_skb_irq(skb);
Jesse Brandeburgb94b5022010-01-19 14:15:59 +00001360 if (staterr & E1000_RXD_STAT_EOP)
1361 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001362 goto next_desc;
1363 }
1364
Ben Greearcf955e62012-02-11 15:39:51 +00001365 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1366 !(netdev->features & NETIF_F_RXALL))) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001367 dev_kfree_skb_irq(skb);
1368 goto next_desc;
1369 }
1370
1371 length = le16_to_cpu(rx_desc->wb.middle.length0);
1372
1373 if (!length) {
Jeff Kirsheref456f82011-11-03 11:40:28 +00001374 e_dbg("Last part of the packet spanning multiple descriptors\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07001375 dev_kfree_skb_irq(skb);
1376 goto next_desc;
1377 }
1378
1379 /* Good Receive */
1380 skb_put(skb, length);
1381
1382 {
Bruce Allane921eb12012-11-28 09:28:37 +00001383 /* this looks ugly, but it seems compiler issues make
Bruce Allan0e15df42012-01-31 06:37:11 +00001384 * it more efficient than reusing j
1385 */
1386 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001387
Bruce Allane921eb12012-11-28 09:28:37 +00001388 /* page alloc/put takes too long and effects small
Bruce Allan0e15df42012-01-31 06:37:11 +00001389 * packet throughput, so unsplit small packets and
1390 * save the alloc/put only valid in softirq (napi)
1391 * context to call kmap_*
Bruce Allanad680762008-03-28 09:15:03 -07001392 */
Bruce Allan0e15df42012-01-31 06:37:11 +00001393 if (l1 && (l1 <= copybreak) &&
1394 ((length + l1) <= adapter->rx_ps_bsize0)) {
1395 u8 *vaddr;
Auke Kok140a7482007-10-25 13:57:58 -07001396
Bruce Allan0e15df42012-01-31 06:37:11 +00001397 ps_page = &buffer_info->ps_pages[0];
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00001398
Bruce Allane921eb12012-11-28 09:28:37 +00001399 /* there is no documentation about how to call
Bruce Allan0e15df42012-01-31 06:37:11 +00001400 * kmap_atomic, so we can't hold the mapping
1401 * very long
1402 */
1403 dma_sync_single_for_cpu(&pdev->dev,
1404 ps_page->dma,
1405 PAGE_SIZE,
1406 DMA_FROM_DEVICE);
Linus Torvalds9f393832012-03-21 09:40:26 -07001407 vaddr = kmap_atomic(ps_page->page);
Bruce Allan0e15df42012-01-31 06:37:11 +00001408 memcpy(skb_tail_pointer(skb), vaddr, l1);
Linus Torvalds9f393832012-03-21 09:40:26 -07001409 kunmap_atomic(vaddr);
Bruce Allan0e15df42012-01-31 06:37:11 +00001410 dma_sync_single_for_device(&pdev->dev,
1411 ps_page->dma,
1412 PAGE_SIZE,
1413 DMA_FROM_DEVICE);
1414
1415 /* remove the CRC */
Ben Greear01840392012-02-11 15:39:25 +00001416 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1417 if (!(netdev->features & NETIF_F_RXFCS))
1418 l1 -= 4;
1419 }
Bruce Allan0e15df42012-01-31 06:37:11 +00001420
1421 skb_put(skb, l1);
1422 goto copydone;
Bruce Allane80bd1d2013-05-01 01:19:46 +00001423 } /* if */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001424 }
1425
1426 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1427 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1428 if (!length)
1429 break;
1430
Auke Kok47f44e42007-10-25 13:57:44 -07001431 ps_page = &buffer_info->ps_pages[j];
Nick Nunley0be3f552010-04-27 13:09:05 +00001432 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1433 DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001434 ps_page->dma = 0;
1435 skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1436 ps_page->page = NULL;
1437 skb->len += length;
1438 skb->data_len += length;
Eric Dumazet98a045d2011-10-13 08:03:36 +00001439 skb->truesize += PAGE_SIZE;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001440 }
1441
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00001442 /* strip the ethernet crc, problem is we're using pages now so
1443 * this whole operation can get a little cpu intensive
1444 */
Ben Greear01840392012-02-11 15:39:25 +00001445 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1446 if (!(netdev->features & NETIF_F_RXFCS))
1447 pskb_trim(skb, skb->len - 4);
1448 }
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00001449
Auke Kokbc7f75f2007-09-17 12:30:59 -07001450copydone:
1451 total_rx_bytes += skb->len;
1452 total_rx_packets++;
1453
Bruce Allan2e1706f2012-06-30 20:02:42 +00001454 e1000_rx_checksum(adapter, staterr, skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001455
Bruce Allan70495a52012-01-11 01:26:50 +00001456 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1457
Auke Kokbc7f75f2007-09-17 12:30:59 -07001458 if (rx_desc->wb.upper.header_status &
Bruce Allan17e813e2013-02-20 04:06:01 +00001459 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
Auke Kokbc7f75f2007-09-17 12:30:59 -07001460 adapter->rx_hdr_split++;
1461
Bruce Allanb67e1912012-12-27 08:32:33 +00001462 e1000_receive_skb(adapter, netdev, skb, staterr,
1463 rx_desc->wb.middle.vlan);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001464
1465next_desc:
1466 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1467 buffer_info->skb = NULL;
1468
1469 /* return some buffers to hardware, one at a time is too slow */
1470 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
Bruce Allan55aa6982011-12-16 00:45:45 +00001471 adapter->alloc_rx_buf(rx_ring, cleaned_count,
Jeff Kirsherc2fed992011-07-12 16:10:12 +00001472 GFP_ATOMIC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001473 cleaned_count = 0;
1474 }
1475
1476 /* use prefetched values */
1477 rx_desc = next_rxd;
1478 buffer_info = next_buffer;
1479
1480 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1481 }
1482 rx_ring->next_to_clean = i;
1483
1484 cleaned_count = e1000_desc_unused(rx_ring);
1485 if (cleaned_count)
Bruce Allan55aa6982011-12-16 00:45:45 +00001486 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001487
Auke Kokbc7f75f2007-09-17 12:30:59 -07001488 adapter->total_rx_bytes += total_rx_bytes;
Bruce Allan7c257692008-04-23 11:09:00 -07001489 adapter->total_rx_packets += total_rx_packets;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001490 return cleaned;
1491}
1492
1493/**
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001494 * e1000_consume_page - helper function
1495 **/
1496static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
Bruce Allan66501f52013-02-20 04:05:55 +00001497 u16 length)
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001498{
1499 bi->page = NULL;
1500 skb->len += length;
1501 skb->data_len += length;
Eric Dumazet98a045d2011-10-13 08:03:36 +00001502 skb->truesize += PAGE_SIZE;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001503}
1504
1505/**
1506 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1507 * @adapter: board private structure
1508 *
1509 * the return value indicates whether actual cleaning was done, there
1510 * is no guarantee that everything was cleaned
1511 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00001512static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1513 int work_to_do)
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001514{
Bruce Allan55aa6982011-12-16 00:45:45 +00001515 struct e1000_adapter *adapter = rx_ring->adapter;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001516 struct net_device *netdev = adapter->netdev;
1517 struct pci_dev *pdev = adapter->pdev;
Bruce Allan5f450212011-07-22 06:21:46 +00001518 union e1000_rx_desc_extended *rx_desc, *next_rxd;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001519 struct e1000_buffer *buffer_info, *next_buffer;
Bruce Allan5f450212011-07-22 06:21:46 +00001520 u32 length, staterr;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001521 unsigned int i;
1522 int cleaned_count = 0;
1523 bool cleaned = false;
Bruce Allan362e20c2013-02-20 04:05:45 +00001524 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
Bruce Allan17e813e2013-02-20 04:06:01 +00001525 struct skb_shared_info *shinfo;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001526
1527 i = rx_ring->next_to_clean;
Bruce Allan5f450212011-07-22 06:21:46 +00001528 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1529 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001530 buffer_info = &rx_ring->buffer_info[i];
1531
Bruce Allan5f450212011-07-22 06:21:46 +00001532 while (staterr & E1000_RXD_STAT_DD) {
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001533 struct sk_buff *skb;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001534
1535 if (*work_done >= work_to_do)
1536 break;
1537 (*work_done)++;
Jeff Kirsher2d0bb1c2010-08-08 16:02:31 +00001538 rmb(); /* read descriptor and rx_buffer_info after status DD */
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001539
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001540 skb = buffer_info->skb;
1541 buffer_info->skb = NULL;
1542
1543 ++i;
1544 if (i == rx_ring->count)
1545 i = 0;
Bruce Allan5f450212011-07-22 06:21:46 +00001546 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001547 prefetch(next_rxd);
1548
1549 next_buffer = &rx_ring->buffer_info[i];
1550
1551 cleaned = true;
1552 cleaned_count++;
Nick Nunley0be3f552010-04-27 13:09:05 +00001553 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1554 DMA_FROM_DEVICE);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001555 buffer_info->dma = 0;
1556
Bruce Allan5f450212011-07-22 06:21:46 +00001557 length = le16_to_cpu(rx_desc->wb.upper.length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001558
1559 /* errors is only valid for DD + EOP descriptors */
Bruce Allan5f450212011-07-22 06:21:46 +00001560 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
Ben Greearcf955e62012-02-11 15:39:51 +00001561 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1562 !(netdev->features & NETIF_F_RXALL)))) {
Bruce Allan5f450212011-07-22 06:21:46 +00001563 /* recycle both page and skb */
1564 buffer_info->skb = skb;
1565 /* an error means any chain goes out the window too */
1566 if (rx_ring->rx_skb_top)
1567 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1568 rx_ring->rx_skb_top = NULL;
1569 goto next_desc;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001570 }
Bruce Allanf0f1a172010-12-11 05:53:32 +00001571#define rxtop (rx_ring->rx_skb_top)
Bruce Allan5f450212011-07-22 06:21:46 +00001572 if (!(staterr & E1000_RXD_STAT_EOP)) {
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001573 /* this descriptor is only the beginning (or middle) */
1574 if (!rxtop) {
1575 /* this is the beginning of a chain */
1576 rxtop = skb;
1577 skb_fill_page_desc(rxtop, 0, buffer_info->page,
Bruce Allanf0ff4392013-02-20 04:05:39 +00001578 0, length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001579 } else {
1580 /* this is the middle of a chain */
Bruce Allan17e813e2013-02-20 04:06:01 +00001581 shinfo = skb_shinfo(rxtop);
1582 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1583 buffer_info->page, 0,
1584 length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001585 /* re-use the skb, only consumed the page */
1586 buffer_info->skb = skb;
1587 }
1588 e1000_consume_page(buffer_info, rxtop, length);
1589 goto next_desc;
1590 } else {
1591 if (rxtop) {
1592 /* end of the chain */
Bruce Allan17e813e2013-02-20 04:06:01 +00001593 shinfo = skb_shinfo(rxtop);
1594 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1595 buffer_info->page, 0,
1596 length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001597 /* re-use the current skb, we only consumed the
Bruce Allane921eb12012-11-28 09:28:37 +00001598 * page
1599 */
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001600 buffer_info->skb = skb;
1601 skb = rxtop;
1602 rxtop = NULL;
1603 e1000_consume_page(buffer_info, skb, length);
1604 } else {
1605 /* no chain, got EOP, this buf is the packet
Bruce Allane921eb12012-11-28 09:28:37 +00001606 * copybreak to save the put_page/alloc_page
1607 */
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001608 if (length <= copybreak &&
1609 skb_tailroom(skb) >= length) {
1610 u8 *vaddr;
Cong Wang46790262011-11-25 23:14:23 +08001611 vaddr = kmap_atomic(buffer_info->page);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001612 memcpy(skb_tail_pointer(skb), vaddr,
1613 length);
Cong Wang46790262011-11-25 23:14:23 +08001614 kunmap_atomic(vaddr);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001615 /* re-use the page, so don't erase
Bruce Allane921eb12012-11-28 09:28:37 +00001616 * buffer_info->page
1617 */
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001618 skb_put(skb, length);
1619 } else {
1620 skb_fill_page_desc(skb, 0,
Bruce Allanf0ff4392013-02-20 04:05:39 +00001621 buffer_info->page, 0,
1622 length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001623 e1000_consume_page(buffer_info, skb,
Bruce Allanf0ff4392013-02-20 04:05:39 +00001624 length);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001625 }
1626 }
1627 }
1628
Bruce Allan2e1706f2012-06-30 20:02:42 +00001629 /* Receive Checksum Offload */
1630 e1000_rx_checksum(adapter, staterr, skb);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001631
Bruce Allan70495a52012-01-11 01:26:50 +00001632 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1633
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001634 /* probably a little skewed due to removing CRC */
1635 total_rx_bytes += skb->len;
1636 total_rx_packets++;
1637
1638 /* eth type trans needs skb->data to point to something */
1639 if (!pskb_may_pull(skb, ETH_HLEN)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07001640 e_err("pskb_may_pull failed.\n");
Bruce Allanef5ab892011-02-10 08:17:21 +00001641 dev_kfree_skb_irq(skb);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001642 goto next_desc;
1643 }
1644
Bruce Allan5f450212011-07-22 06:21:46 +00001645 e1000_receive_skb(adapter, netdev, skb, staterr,
1646 rx_desc->wb.upper.vlan);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001647
1648next_desc:
Bruce Allan5f450212011-07-22 06:21:46 +00001649 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001650
1651 /* return some buffers to hardware, one at a time is too slow */
1652 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
Bruce Allan55aa6982011-12-16 00:45:45 +00001653 adapter->alloc_rx_buf(rx_ring, cleaned_count,
Jeff Kirsherc2fed992011-07-12 16:10:12 +00001654 GFP_ATOMIC);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001655 cleaned_count = 0;
1656 }
1657
1658 /* use prefetched values */
1659 rx_desc = next_rxd;
1660 buffer_info = next_buffer;
Bruce Allan5f450212011-07-22 06:21:46 +00001661
1662 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001663 }
1664 rx_ring->next_to_clean = i;
1665
1666 cleaned_count = e1000_desc_unused(rx_ring);
1667 if (cleaned_count)
Bruce Allan55aa6982011-12-16 00:45:45 +00001668 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001669
1670 adapter->total_rx_bytes += total_rx_bytes;
1671 adapter->total_rx_packets += total_rx_packets;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001672 return cleaned;
1673}
1674
1675/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07001676 * e1000_clean_rx_ring - Free Rx Buffers per Queue
Bruce Allan55aa6982011-12-16 00:45:45 +00001677 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07001678 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00001679static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001680{
Bruce Allan55aa6982011-12-16 00:45:45 +00001681 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001682 struct e1000_buffer *buffer_info;
1683 struct e1000_ps_page *ps_page;
1684 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001685 unsigned int i, j;
1686
1687 /* Free all the Rx ring sk_buffs */
1688 for (i = 0; i < rx_ring->count; i++) {
1689 buffer_info = &rx_ring->buffer_info[i];
1690 if (buffer_info->dma) {
1691 if (adapter->clean_rx == e1000_clean_rx_irq)
Nick Nunley0be3f552010-04-27 13:09:05 +00001692 dma_unmap_single(&pdev->dev, buffer_info->dma,
Auke Kokbc7f75f2007-09-17 12:30:59 -07001693 adapter->rx_buffer_len,
Nick Nunley0be3f552010-04-27 13:09:05 +00001694 DMA_FROM_DEVICE);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001695 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
Nick Nunley0be3f552010-04-27 13:09:05 +00001696 dma_unmap_page(&pdev->dev, buffer_info->dma,
Bruce Allanf0ff4392013-02-20 04:05:39 +00001697 PAGE_SIZE, DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001698 else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
Nick Nunley0be3f552010-04-27 13:09:05 +00001699 dma_unmap_single(&pdev->dev, buffer_info->dma,
Auke Kokbc7f75f2007-09-17 12:30:59 -07001700 adapter->rx_ps_bsize0,
Nick Nunley0be3f552010-04-27 13:09:05 +00001701 DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001702 buffer_info->dma = 0;
1703 }
1704
Bruce Allan97ac8ca2008-04-29 09:16:05 -07001705 if (buffer_info->page) {
1706 put_page(buffer_info->page);
1707 buffer_info->page = NULL;
1708 }
1709
Auke Kokbc7f75f2007-09-17 12:30:59 -07001710 if (buffer_info->skb) {
1711 dev_kfree_skb(buffer_info->skb);
1712 buffer_info->skb = NULL;
1713 }
1714
1715 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
Auke Kok47f44e42007-10-25 13:57:44 -07001716 ps_page = &buffer_info->ps_pages[j];
Auke Kokbc7f75f2007-09-17 12:30:59 -07001717 if (!ps_page->page)
1718 break;
Nick Nunley0be3f552010-04-27 13:09:05 +00001719 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1720 DMA_FROM_DEVICE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001721 ps_page->dma = 0;
1722 put_page(ps_page->page);
1723 ps_page->page = NULL;
1724 }
1725 }
1726
1727 /* there also may be some cached data from a chained receive */
1728 if (rx_ring->rx_skb_top) {
1729 dev_kfree_skb(rx_ring->rx_skb_top);
1730 rx_ring->rx_skb_top = NULL;
1731 }
1732
Auke Kokbc7f75f2007-09-17 12:30:59 -07001733 /* Zero out the descriptor ring */
1734 memset(rx_ring->desc, 0, rx_ring->size);
1735
1736 rx_ring->next_to_clean = 0;
1737 rx_ring->next_to_use = 0;
Jesse Brandeburgb94b5022010-01-19 14:15:59 +00001738 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001739
Bruce Allanc5083cf2011-12-16 00:45:40 +00001740 writel(0, rx_ring->head);
David Ertmanb485dba2014-01-22 00:21:41 +00001741 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allanbdc125f2012-03-20 03:47:52 +00001742 e1000e_update_rdt_wa(rx_ring, 0);
1743 else
1744 writel(0, rx_ring->tail);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001745}
1746
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001747static void e1000e_downshift_workaround(struct work_struct *work)
1748{
1749 struct e1000_adapter *adapter = container_of(work,
Bruce Allan17e813e2013-02-20 04:06:01 +00001750 struct e1000_adapter,
1751 downshift_task);
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001752
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00001753 if (test_bit(__E1000_DOWN, &adapter->state))
1754 return;
1755
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001756 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1757}
1758
Auke Kokbc7f75f2007-09-17 12:30:59 -07001759/**
1760 * e1000_intr_msi - Interrupt Handler
1761 * @irq: interrupt number
1762 * @data: pointer to a network interface device structure
1763 **/
Bruce Allan8bb62862013-01-16 08:46:49 +00001764static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001765{
1766 struct net_device *netdev = data;
1767 struct e1000_adapter *adapter = netdev_priv(netdev);
1768 struct e1000_hw *hw = &adapter->hw;
1769 u32 icr = er32(ICR);
1770
Bruce Allane921eb12012-11-28 09:28:37 +00001771 /* read ICR disables interrupts using IAM */
dave graham573cca82009-02-10 12:52:05 +00001772 if (icr & E1000_ICR_LSC) {
Bruce Allanf92518d2012-02-01 11:16:42 +00001773 hw->mac.get_link_status = true;
Bruce Allane921eb12012-11-28 09:28:37 +00001774 /* ICH8 workaround-- Call gig speed drop workaround on cable
Bruce Allanad680762008-03-28 09:15:03 -07001775 * disconnect (LSC) before accessing any PHY registers
1776 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001777 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1778 (!(er32(STATUS) & E1000_STATUS_LU)))
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001779 schedule_work(&adapter->downshift_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001780
Bruce Allane921eb12012-11-28 09:28:37 +00001781 /* 80003ES2LAN workaround-- For packet buffer work-around on
Auke Kokbc7f75f2007-09-17 12:30:59 -07001782 * link down event; disable receives here in the ISR and reset
Bruce Allanad680762008-03-28 09:15:03 -07001783 * adapter in watchdog
1784 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001785 if (netif_carrier_ok(netdev) &&
1786 adapter->flags & FLAG_RX_NEEDS_RESTART) {
1787 /* disable receives */
1788 u32 rctl = er32(RCTL);
David Ertman6cf08d12014-04-05 06:07:00 +00001789
Auke Kokbc7f75f2007-09-17 12:30:59 -07001790 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Bruce Allan12d43f72012-12-05 06:26:14 +00001791 adapter->flags |= FLAG_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001792 }
1793 /* guard against interrupt when we're going down */
1794 if (!test_bit(__E1000_DOWN, &adapter->state))
1795 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1796 }
1797
Bruce Allan94fb8482013-01-23 09:00:03 +00001798 /* Reset on uncorrectable ECC error */
1799 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1800 u32 pbeccsts = er32(PBECCSTS);
1801
1802 adapter->corr_errors +=
1803 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1804 adapter->uncorr_errors +=
1805 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1806 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1807
1808 /* Do the reset outside of interrupt context */
1809 schedule_work(&adapter->reset_task);
1810
1811 /* return immediately since reset is imminent */
1812 return IRQ_HANDLED;
1813 }
1814
Ben Hutchings288379f2009-01-19 16:43:59 -08001815 if (napi_schedule_prep(&adapter->napi)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001816 adapter->total_tx_bytes = 0;
1817 adapter->total_tx_packets = 0;
1818 adapter->total_rx_bytes = 0;
1819 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001820 __napi_schedule(&adapter->napi);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001821 }
1822
1823 return IRQ_HANDLED;
1824}
1825
1826/**
1827 * e1000_intr - Interrupt Handler
1828 * @irq: interrupt number
1829 * @data: pointer to a network interface device structure
1830 **/
Bruce Allan8bb62862013-01-16 08:46:49 +00001831static irqreturn_t e1000_intr(int __always_unused irq, void *data)
Auke Kokbc7f75f2007-09-17 12:30:59 -07001832{
1833 struct net_device *netdev = data;
1834 struct e1000_adapter *adapter = netdev_priv(netdev);
1835 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001836 u32 rctl, icr = er32(ICR);
Bruce Allan4662e822008-08-26 18:37:06 -07001837
Bruce Allana68ea772009-11-20 23:23:16 +00001838 if (!icr || test_bit(__E1000_DOWN, &adapter->state))
Bruce Allane80bd1d2013-05-01 01:19:46 +00001839 return IRQ_NONE; /* Not our interrupt */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001840
Bruce Allane921eb12012-11-28 09:28:37 +00001841 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
Bruce Allanad680762008-03-28 09:15:03 -07001842 * not set, then the adapter didn't send an interrupt
1843 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001844 if (!(icr & E1000_ICR_INT_ASSERTED))
1845 return IRQ_NONE;
1846
Bruce Allane921eb12012-11-28 09:28:37 +00001847 /* Interrupt Auto-Mask...upon reading ICR,
Bruce Allanad680762008-03-28 09:15:03 -07001848 * interrupts are masked. No need for the
1849 * IMC write
1850 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001851
dave graham573cca82009-02-10 12:52:05 +00001852 if (icr & E1000_ICR_LSC) {
Bruce Allanf92518d2012-02-01 11:16:42 +00001853 hw->mac.get_link_status = true;
Bruce Allane921eb12012-11-28 09:28:37 +00001854 /* ICH8 workaround-- Call gig speed drop workaround on cable
Bruce Allanad680762008-03-28 09:15:03 -07001855 * disconnect (LSC) before accessing any PHY registers
1856 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07001857 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1858 (!(er32(STATUS) & E1000_STATUS_LU)))
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07001859 schedule_work(&adapter->downshift_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001860
Bruce Allane921eb12012-11-28 09:28:37 +00001861 /* 80003ES2LAN workaround--
Auke Kokbc7f75f2007-09-17 12:30:59 -07001862 * For packet buffer work-around on link down event;
1863 * disable receives here in the ISR and
1864 * reset adapter in watchdog
1865 */
1866 if (netif_carrier_ok(netdev) &&
1867 (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1868 /* disable receives */
1869 rctl = er32(RCTL);
1870 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Bruce Allan12d43f72012-12-05 06:26:14 +00001871 adapter->flags |= FLAG_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07001872 }
1873 /* guard against interrupt when we're going down */
1874 if (!test_bit(__E1000_DOWN, &adapter->state))
1875 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1876 }
1877
Bruce Allan94fb8482013-01-23 09:00:03 +00001878 /* Reset on uncorrectable ECC error */
1879 if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1880 u32 pbeccsts = er32(PBECCSTS);
1881
1882 adapter->corr_errors +=
1883 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1884 adapter->uncorr_errors +=
1885 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1886 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1887
1888 /* Do the reset outside of interrupt context */
1889 schedule_work(&adapter->reset_task);
1890
1891 /* return immediately since reset is imminent */
1892 return IRQ_HANDLED;
1893 }
1894
Ben Hutchings288379f2009-01-19 16:43:59 -08001895 if (napi_schedule_prep(&adapter->napi)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07001896 adapter->total_tx_bytes = 0;
1897 adapter->total_tx_packets = 0;
1898 adapter->total_rx_bytes = 0;
1899 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001900 __napi_schedule(&adapter->napi);
Auke Kokbc7f75f2007-09-17 12:30:59 -07001901 }
1902
1903 return IRQ_HANDLED;
1904}
1905
Bruce Allan8bb62862013-01-16 08:46:49 +00001906static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
Bruce Allan4662e822008-08-26 18:37:06 -07001907{
1908 struct net_device *netdev = data;
1909 struct e1000_adapter *adapter = netdev_priv(netdev);
1910 struct e1000_hw *hw = &adapter->hw;
1911 u32 icr = er32(ICR);
1912
1913 if (!(icr & E1000_ICR_INT_ASSERTED)) {
Jesse Brandeburga3c69fe2009-03-25 22:05:41 +00001914 if (!test_bit(__E1000_DOWN, &adapter->state))
1915 ew32(IMS, E1000_IMS_OTHER);
Bruce Allan4662e822008-08-26 18:37:06 -07001916 return IRQ_NONE;
1917 }
1918
1919 if (icr & adapter->eiac_mask)
1920 ew32(ICS, (icr & adapter->eiac_mask));
1921
1922 if (icr & E1000_ICR_OTHER) {
1923 if (!(icr & E1000_ICR_LSC))
1924 goto no_link_interrupt;
Bruce Allanf92518d2012-02-01 11:16:42 +00001925 hw->mac.get_link_status = true;
Bruce Allan4662e822008-08-26 18:37:06 -07001926 /* guard against interrupt when we're going down */
1927 if (!test_bit(__E1000_DOWN, &adapter->state))
1928 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1929 }
1930
1931no_link_interrupt:
Jesse Brandeburga3c69fe2009-03-25 22:05:41 +00001932 if (!test_bit(__E1000_DOWN, &adapter->state))
1933 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
Bruce Allan4662e822008-08-26 18:37:06 -07001934
1935 return IRQ_HANDLED;
1936}
1937
Bruce Allan8bb62862013-01-16 08:46:49 +00001938static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data)
Bruce Allan4662e822008-08-26 18:37:06 -07001939{
1940 struct net_device *netdev = data;
1941 struct e1000_adapter *adapter = netdev_priv(netdev);
1942 struct e1000_hw *hw = &adapter->hw;
1943 struct e1000_ring *tx_ring = adapter->tx_ring;
1944
Bruce Allan4662e822008-08-26 18:37:06 -07001945 adapter->total_tx_bytes = 0;
1946 adapter->total_tx_packets = 0;
1947
Bruce Allan55aa6982011-12-16 00:45:45 +00001948 if (!e1000_clean_tx_irq(tx_ring))
Bruce Allan4662e822008-08-26 18:37:06 -07001949 /* Ring was not completely cleaned, so fire another interrupt */
1950 ew32(ICS, tx_ring->ims_val);
1951
1952 return IRQ_HANDLED;
1953}
1954
Bruce Allan8bb62862013-01-16 08:46:49 +00001955static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data)
Bruce Allan4662e822008-08-26 18:37:06 -07001956{
1957 struct net_device *netdev = data;
1958 struct e1000_adapter *adapter = netdev_priv(netdev);
Bruce Allan55aa6982011-12-16 00:45:45 +00001959 struct e1000_ring *rx_ring = adapter->rx_ring;
Bruce Allan4662e822008-08-26 18:37:06 -07001960
1961 /* Write the ITR value calculated at the end of the
1962 * previous interrupt.
1963 */
Bruce Allan55aa6982011-12-16 00:45:45 +00001964 if (rx_ring->set_itr) {
1965 writel(1000000000 / (rx_ring->itr_val * 256),
1966 rx_ring->itr_register);
1967 rx_ring->set_itr = 0;
Bruce Allan4662e822008-08-26 18:37:06 -07001968 }
1969
Ben Hutchings288379f2009-01-19 16:43:59 -08001970 if (napi_schedule_prep(&adapter->napi)) {
Bruce Allan4662e822008-08-26 18:37:06 -07001971 adapter->total_rx_bytes = 0;
1972 adapter->total_rx_packets = 0;
Ben Hutchings288379f2009-01-19 16:43:59 -08001973 __napi_schedule(&adapter->napi);
Bruce Allan4662e822008-08-26 18:37:06 -07001974 }
1975 return IRQ_HANDLED;
1976}
1977
1978/**
1979 * e1000_configure_msix - Configure MSI-X hardware
1980 *
1981 * e1000_configure_msix sets up the hardware to properly
1982 * generate MSI-X interrupts.
1983 **/
1984static void e1000_configure_msix(struct e1000_adapter *adapter)
1985{
1986 struct e1000_hw *hw = &adapter->hw;
1987 struct e1000_ring *rx_ring = adapter->rx_ring;
1988 struct e1000_ring *tx_ring = adapter->tx_ring;
1989 int vector = 0;
1990 u32 ctrl_ext, ivar = 0;
1991
1992 adapter->eiac_mask = 0;
1993
1994 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1995 if (hw->mac.type == e1000_82574) {
1996 u32 rfctl = er32(RFCTL);
David Ertman6cf08d12014-04-05 06:07:00 +00001997
Bruce Allan4662e822008-08-26 18:37:06 -07001998 rfctl |= E1000_RFCTL_ACK_DIS;
1999 ew32(RFCTL, rfctl);
2000 }
2001
Bruce Allan4662e822008-08-26 18:37:06 -07002002 /* Configure Rx vector */
2003 rx_ring->ims_val = E1000_IMS_RXQ0;
2004 adapter->eiac_mask |= rx_ring->ims_val;
2005 if (rx_ring->itr_val)
2006 writel(1000000000 / (rx_ring->itr_val * 256),
Bruce Allanc5083cf2011-12-16 00:45:40 +00002007 rx_ring->itr_register);
Bruce Allan4662e822008-08-26 18:37:06 -07002008 else
Bruce Allanc5083cf2011-12-16 00:45:40 +00002009 writel(1, rx_ring->itr_register);
Bruce Allan4662e822008-08-26 18:37:06 -07002010 ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
2011
2012 /* Configure Tx vector */
2013 tx_ring->ims_val = E1000_IMS_TXQ0;
2014 vector++;
2015 if (tx_ring->itr_val)
2016 writel(1000000000 / (tx_ring->itr_val * 256),
Bruce Allanc5083cf2011-12-16 00:45:40 +00002017 tx_ring->itr_register);
Bruce Allan4662e822008-08-26 18:37:06 -07002018 else
Bruce Allanc5083cf2011-12-16 00:45:40 +00002019 writel(1, tx_ring->itr_register);
Bruce Allan4662e822008-08-26 18:37:06 -07002020 adapter->eiac_mask |= tx_ring->ims_val;
2021 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
2022
2023 /* set vector for Other Causes, e.g. link changes */
2024 vector++;
2025 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
2026 if (rx_ring->itr_val)
2027 writel(1000000000 / (rx_ring->itr_val * 256),
2028 hw->hw_addr + E1000_EITR_82574(vector));
2029 else
2030 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
2031
2032 /* Cause Tx interrupts on every write back */
2033 ivar |= (1 << 31);
2034
2035 ew32(IVAR, ivar);
2036
2037 /* enable MSI-X PBA support */
2038 ctrl_ext = er32(CTRL_EXT);
2039 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
2040
2041 /* Auto-Mask Other interrupts upon ICR read */
Bruce Allan4662e822008-08-26 18:37:06 -07002042 ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
2043 ctrl_ext |= E1000_CTRL_EXT_EIAME;
2044 ew32(CTRL_EXT, ctrl_ext);
2045 e1e_flush();
2046}
2047
2048void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
2049{
2050 if (adapter->msix_entries) {
2051 pci_disable_msix(adapter->pdev);
2052 kfree(adapter->msix_entries);
2053 adapter->msix_entries = NULL;
2054 } else if (adapter->flags & FLAG_MSI_ENABLED) {
2055 pci_disable_msi(adapter->pdev);
2056 adapter->flags &= ~FLAG_MSI_ENABLED;
2057 }
Bruce Allan4662e822008-08-26 18:37:06 -07002058}
2059
2060/**
2061 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
2062 *
2063 * Attempt to configure interrupts using the best available
2064 * capabilities of the hardware and kernel.
2065 **/
2066void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
2067{
2068 int err;
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002069 int i;
Bruce Allan4662e822008-08-26 18:37:06 -07002070
2071 switch (adapter->int_mode) {
2072 case E1000E_INT_MODE_MSIX:
2073 if (adapter->flags & FLAG_HAS_MSIX) {
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002074 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
2075 adapter->msix_entries = kcalloc(adapter->num_vectors,
Bruce Allan17e813e2013-02-20 04:06:01 +00002076 sizeof(struct
2077 msix_entry),
2078 GFP_KERNEL);
Bruce Allan4662e822008-08-26 18:37:06 -07002079 if (adapter->msix_entries) {
Alexander Gordeev0cc7c952014-02-18 11:11:41 +01002080 struct e1000_adapter *a = adapter;
2081
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002082 for (i = 0; i < adapter->num_vectors; i++)
Bruce Allan4662e822008-08-26 18:37:06 -07002083 adapter->msix_entries[i].entry = i;
2084
Alexander Gordeev0cc7c952014-02-18 11:11:41 +01002085 err = pci_enable_msix_range(a->pdev,
2086 a->msix_entries,
2087 a->num_vectors,
2088 a->num_vectors);
2089 if (err > 0)
Bruce Allan4662e822008-08-26 18:37:06 -07002090 return;
2091 }
2092 /* MSI-X failed, so fall through and try MSI */
Jeff Kirsheref456f82011-11-03 11:40:28 +00002093 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n");
Bruce Allan4662e822008-08-26 18:37:06 -07002094 e1000e_reset_interrupt_capability(adapter);
2095 }
2096 adapter->int_mode = E1000E_INT_MODE_MSI;
2097 /* Fall through */
2098 case E1000E_INT_MODE_MSI:
2099 if (!pci_enable_msi(adapter->pdev)) {
2100 adapter->flags |= FLAG_MSI_ENABLED;
2101 } else {
2102 adapter->int_mode = E1000E_INT_MODE_LEGACY;
Jeff Kirsheref456f82011-11-03 11:40:28 +00002103 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n");
Bruce Allan4662e822008-08-26 18:37:06 -07002104 }
2105 /* Fall through */
2106 case E1000E_INT_MODE_LEGACY:
2107 /* Don't do anything; this is the system default */
2108 break;
2109 }
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002110
2111 /* store the number of vectors being used */
2112 adapter->num_vectors = 1;
Bruce Allan4662e822008-08-26 18:37:06 -07002113}
2114
2115/**
2116 * e1000_request_msix - Initialize MSI-X interrupts
2117 *
2118 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
2119 * kernel.
2120 **/
2121static int e1000_request_msix(struct e1000_adapter *adapter)
2122{
2123 struct net_device *netdev = adapter->netdev;
2124 int err = 0, vector = 0;
2125
2126 if (strlen(netdev->name) < (IFNAMSIZ - 5))
Bruce Allan79f5e842011-01-19 04:20:59 +00002127 snprintf(adapter->rx_ring->name,
2128 sizeof(adapter->rx_ring->name) - 1,
2129 "%s-rx-0", netdev->name);
Bruce Allan4662e822008-08-26 18:37:06 -07002130 else
2131 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
2132 err = request_irq(adapter->msix_entries[vector].vector,
Joe Perchesa0607fd2009-11-18 23:29:17 -08002133 e1000_intr_msix_rx, 0, adapter->rx_ring->name,
Bruce Allan4662e822008-08-26 18:37:06 -07002134 netdev);
2135 if (err)
Bruce Allan5015e532012-02-08 02:55:56 +00002136 return err;
Bruce Allanc5083cf2011-12-16 00:45:40 +00002137 adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2138 E1000_EITR_82574(vector);
Bruce Allan4662e822008-08-26 18:37:06 -07002139 adapter->rx_ring->itr_val = adapter->itr;
2140 vector++;
2141
2142 if (strlen(netdev->name) < (IFNAMSIZ - 5))
Bruce Allan79f5e842011-01-19 04:20:59 +00002143 snprintf(adapter->tx_ring->name,
2144 sizeof(adapter->tx_ring->name) - 1,
2145 "%s-tx-0", netdev->name);
Bruce Allan4662e822008-08-26 18:37:06 -07002146 else
2147 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2148 err = request_irq(adapter->msix_entries[vector].vector,
Joe Perchesa0607fd2009-11-18 23:29:17 -08002149 e1000_intr_msix_tx, 0, adapter->tx_ring->name,
Bruce Allan4662e822008-08-26 18:37:06 -07002150 netdev);
2151 if (err)
Bruce Allan5015e532012-02-08 02:55:56 +00002152 return err;
Bruce Allanc5083cf2011-12-16 00:45:40 +00002153 adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2154 E1000_EITR_82574(vector);
Bruce Allan4662e822008-08-26 18:37:06 -07002155 adapter->tx_ring->itr_val = adapter->itr;
2156 vector++;
2157
2158 err = request_irq(adapter->msix_entries[vector].vector,
Joe Perchesa0607fd2009-11-18 23:29:17 -08002159 e1000_msix_other, 0, netdev->name, netdev);
Bruce Allan4662e822008-08-26 18:37:06 -07002160 if (err)
Bruce Allan5015e532012-02-08 02:55:56 +00002161 return err;
Bruce Allan4662e822008-08-26 18:37:06 -07002162
2163 e1000_configure_msix(adapter);
Bruce Allan5015e532012-02-08 02:55:56 +00002164
Bruce Allan4662e822008-08-26 18:37:06 -07002165 return 0;
Bruce Allan4662e822008-08-26 18:37:06 -07002166}
2167
Bruce Allanf8d59f72008-08-08 18:36:11 -07002168/**
2169 * e1000_request_irq - initialize interrupts
2170 *
2171 * Attempts to configure interrupts using the best available
2172 * capabilities of the hardware and kernel.
2173 **/
Auke Kokbc7f75f2007-09-17 12:30:59 -07002174static int e1000_request_irq(struct e1000_adapter *adapter)
2175{
2176 struct net_device *netdev = adapter->netdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002177 int err;
2178
Bruce Allan4662e822008-08-26 18:37:06 -07002179 if (adapter->msix_entries) {
2180 err = e1000_request_msix(adapter);
2181 if (!err)
2182 return err;
2183 /* fall back to MSI */
2184 e1000e_reset_interrupt_capability(adapter);
2185 adapter->int_mode = E1000E_INT_MODE_MSI;
2186 e1000e_set_interrupt_capability(adapter);
2187 }
2188 if (adapter->flags & FLAG_MSI_ENABLED) {
Joe Perchesa0607fd2009-11-18 23:29:17 -08002189 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
Bruce Allan4662e822008-08-26 18:37:06 -07002190 netdev->name, netdev);
2191 if (!err)
2192 return err;
2193
2194 /* fall back to legacy interrupt */
2195 e1000e_reset_interrupt_capability(adapter);
2196 adapter->int_mode = E1000E_INT_MODE_LEGACY;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002197 }
2198
Joe Perchesa0607fd2009-11-18 23:29:17 -08002199 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
Bruce Allan4662e822008-08-26 18:37:06 -07002200 netdev->name, netdev);
2201 if (err)
Bruce Allanf8d59f72008-08-08 18:36:11 -07002202 e_err("Unable to allocate interrupt, Error: %d\n", err);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002203
2204 return err;
2205}
2206
2207static void e1000_free_irq(struct e1000_adapter *adapter)
2208{
2209 struct net_device *netdev = adapter->netdev;
2210
Bruce Allan4662e822008-08-26 18:37:06 -07002211 if (adapter->msix_entries) {
2212 int vector = 0;
2213
2214 free_irq(adapter->msix_entries[vector].vector, netdev);
2215 vector++;
2216
2217 free_irq(adapter->msix_entries[vector].vector, netdev);
2218 vector++;
2219
2220 /* Other Causes interrupt vector */
2221 free_irq(adapter->msix_entries[vector].vector, netdev);
2222 return;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002223 }
Bruce Allan4662e822008-08-26 18:37:06 -07002224
2225 free_irq(adapter->pdev->irq, netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002226}
2227
2228/**
2229 * e1000_irq_disable - Mask off interrupt generation on the NIC
2230 **/
2231static void e1000_irq_disable(struct e1000_adapter *adapter)
2232{
2233 struct e1000_hw *hw = &adapter->hw;
2234
Auke Kokbc7f75f2007-09-17 12:30:59 -07002235 ew32(IMC, ~0);
Bruce Allan4662e822008-08-26 18:37:06 -07002236 if (adapter->msix_entries)
2237 ew32(EIAC_82574, 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002238 e1e_flush();
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002239
2240 if (adapter->msix_entries) {
2241 int i;
David Ertman6cf08d12014-04-05 06:07:00 +00002242
Jeff Kirsher8e86acd2010-08-02 14:27:23 +00002243 for (i = 0; i < adapter->num_vectors; i++)
2244 synchronize_irq(adapter->msix_entries[i].vector);
2245 } else {
2246 synchronize_irq(adapter->pdev->irq);
2247 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002248}
2249
2250/**
2251 * e1000_irq_enable - Enable default interrupt generation settings
2252 **/
2253static void e1000_irq_enable(struct e1000_adapter *adapter)
2254{
2255 struct e1000_hw *hw = &adapter->hw;
2256
Bruce Allan4662e822008-08-26 18:37:06 -07002257 if (adapter->msix_entries) {
2258 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2259 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
Bruce Allan94fb8482013-01-23 09:00:03 +00002260 } else if (hw->mac.type == e1000_pch_lpt) {
2261 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
Bruce Allan4662e822008-08-26 18:37:06 -07002262 } else {
2263 ew32(IMS, IMS_ENABLE_MASK);
2264 }
Jesse Brandeburg74ef9c32008-03-21 11:06:52 -07002265 e1e_flush();
Auke Kokbc7f75f2007-09-17 12:30:59 -07002266}
2267
2268/**
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002269 * e1000e_get_hw_control - get control of the h/w from f/w
Auke Kokbc7f75f2007-09-17 12:30:59 -07002270 * @adapter: address of board private structure
2271 *
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002272 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
Auke Kokbc7f75f2007-09-17 12:30:59 -07002273 * For ASF and Pass Through versions of f/w this means that
2274 * the driver is loaded. For AMT version (only with 82573)
2275 * of the f/w this means that the network i/f is open.
2276 **/
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002277void e1000e_get_hw_control(struct e1000_adapter *adapter)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002278{
2279 struct e1000_hw *hw = &adapter->hw;
2280 u32 ctrl_ext;
2281 u32 swsm;
2282
2283 /* Let firmware know the driver has taken over */
2284 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2285 swsm = er32(SWSM);
2286 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2287 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2288 ctrl_ext = er32(CTRL_EXT);
Bruce Allanad680762008-03-28 09:15:03 -07002289 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002290 }
2291}
2292
2293/**
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002294 * e1000e_release_hw_control - release control of the h/w to f/w
Auke Kokbc7f75f2007-09-17 12:30:59 -07002295 * @adapter: address of board private structure
2296 *
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002297 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
Auke Kokbc7f75f2007-09-17 12:30:59 -07002298 * For ASF and Pass Through versions of f/w this means that the
2299 * driver is no longer loaded. For AMT version (only with 82573) i
2300 * of the f/w this means that the network i/f is closed.
2301 *
2302 **/
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002303void e1000e_release_hw_control(struct e1000_adapter *adapter)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002304{
2305 struct e1000_hw *hw = &adapter->hw;
2306 u32 ctrl_ext;
2307 u32 swsm;
2308
2309 /* Let firmware taken over control of h/w */
2310 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2311 swsm = er32(SWSM);
2312 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2313 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2314 ctrl_ext = er32(CTRL_EXT);
Bruce Allanad680762008-03-28 09:15:03 -07002315 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002316 }
2317}
2318
Auke Kokbc7f75f2007-09-17 12:30:59 -07002319/**
Ben Hutchings49ce9c22012-07-10 10:56:00 +00002320 * e1000_alloc_ring_dma - allocate memory for a ring structure
Auke Kokbc7f75f2007-09-17 12:30:59 -07002321 **/
2322static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2323 struct e1000_ring *ring)
2324{
2325 struct pci_dev *pdev = adapter->pdev;
2326
2327 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2328 GFP_KERNEL);
2329 if (!ring->desc)
2330 return -ENOMEM;
2331
2332 return 0;
2333}
2334
2335/**
2336 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
Bruce Allan55aa6982011-12-16 00:45:45 +00002337 * @tx_ring: Tx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07002338 *
2339 * Return 0 on success, negative on failure
2340 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00002341int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002342{
Bruce Allan55aa6982011-12-16 00:45:45 +00002343 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002344 int err = -ENOMEM, size;
2345
2346 size = sizeof(struct e1000_buffer) * tx_ring->count;
Eric Dumazet89bf67f2010-11-22 00:15:06 +00002347 tx_ring->buffer_info = vzalloc(size);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002348 if (!tx_ring->buffer_info)
2349 goto err;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002350
2351 /* round up to nearest 4K */
2352 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2353 tx_ring->size = ALIGN(tx_ring->size, 4096);
2354
2355 err = e1000_alloc_ring_dma(adapter, tx_ring);
2356 if (err)
2357 goto err;
2358
2359 tx_ring->next_to_use = 0;
2360 tx_ring->next_to_clean = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002361
2362 return 0;
2363err:
2364 vfree(tx_ring->buffer_info);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07002365 e_err("Unable to allocate memory for the transmit descriptor ring\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07002366 return err;
2367}
2368
2369/**
2370 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
Bruce Allan55aa6982011-12-16 00:45:45 +00002371 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07002372 *
2373 * Returns 0 on success, negative on failure
2374 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00002375int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002376{
Bruce Allan55aa6982011-12-16 00:45:45 +00002377 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kok47f44e42007-10-25 13:57:44 -07002378 struct e1000_buffer *buffer_info;
2379 int i, size, desc_len, err = -ENOMEM;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002380
2381 size = sizeof(struct e1000_buffer) * rx_ring->count;
Eric Dumazet89bf67f2010-11-22 00:15:06 +00002382 rx_ring->buffer_info = vzalloc(size);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002383 if (!rx_ring->buffer_info)
2384 goto err;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002385
Auke Kok47f44e42007-10-25 13:57:44 -07002386 for (i = 0; i < rx_ring->count; i++) {
2387 buffer_info = &rx_ring->buffer_info[i];
2388 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2389 sizeof(struct e1000_ps_page),
2390 GFP_KERNEL);
2391 if (!buffer_info->ps_pages)
2392 goto err_pages;
2393 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002394
2395 desc_len = sizeof(union e1000_rx_desc_packet_split);
2396
2397 /* Round up to nearest 4K */
2398 rx_ring->size = rx_ring->count * desc_len;
2399 rx_ring->size = ALIGN(rx_ring->size, 4096);
2400
2401 err = e1000_alloc_ring_dma(adapter, rx_ring);
2402 if (err)
Auke Kok47f44e42007-10-25 13:57:44 -07002403 goto err_pages;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002404
2405 rx_ring->next_to_clean = 0;
2406 rx_ring->next_to_use = 0;
2407 rx_ring->rx_skb_top = NULL;
2408
2409 return 0;
Auke Kok47f44e42007-10-25 13:57:44 -07002410
2411err_pages:
2412 for (i = 0; i < rx_ring->count; i++) {
2413 buffer_info = &rx_ring->buffer_info[i];
2414 kfree(buffer_info->ps_pages);
2415 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002416err:
2417 vfree(rx_ring->buffer_info);
Bruce Allane9262442010-11-24 06:02:06 +00002418 e_err("Unable to allocate memory for the receive descriptor ring\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07002419 return err;
2420}
2421
2422/**
2423 * e1000_clean_tx_ring - Free Tx Buffers
Bruce Allan55aa6982011-12-16 00:45:45 +00002424 * @tx_ring: Tx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07002425 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00002426static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002427{
Bruce Allan55aa6982011-12-16 00:45:45 +00002428 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002429 struct e1000_buffer *buffer_info;
2430 unsigned long size;
2431 unsigned int i;
2432
2433 for (i = 0; i < tx_ring->count; i++) {
2434 buffer_info = &tx_ring->buffer_info[i];
Bruce Allan55aa6982011-12-16 00:45:45 +00002435 e1000_put_txbuf(tx_ring, buffer_info);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002436 }
2437
Tom Herbert3f0cfa32011-11-28 16:33:16 +00002438 netdev_reset_queue(adapter->netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002439 size = sizeof(struct e1000_buffer) * tx_ring->count;
2440 memset(tx_ring->buffer_info, 0, size);
2441
2442 memset(tx_ring->desc, 0, tx_ring->size);
2443
2444 tx_ring->next_to_use = 0;
2445 tx_ring->next_to_clean = 0;
2446
Bruce Allanc5083cf2011-12-16 00:45:40 +00002447 writel(0, tx_ring->head);
David Ertmanb485dba2014-01-22 00:21:41 +00002448 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allanbdc125f2012-03-20 03:47:52 +00002449 e1000e_update_tdt_wa(tx_ring, 0);
2450 else
2451 writel(0, tx_ring->tail);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002452}
2453
2454/**
2455 * e1000e_free_tx_resources - Free Tx Resources per Queue
Bruce Allan55aa6982011-12-16 00:45:45 +00002456 * @tx_ring: Tx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07002457 *
2458 * Free all transmit software resources
2459 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00002460void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002461{
Bruce Allan55aa6982011-12-16 00:45:45 +00002462 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002463 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002464
Bruce Allan55aa6982011-12-16 00:45:45 +00002465 e1000_clean_tx_ring(tx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002466
2467 vfree(tx_ring->buffer_info);
2468 tx_ring->buffer_info = NULL;
2469
2470 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2471 tx_ring->dma);
2472 tx_ring->desc = NULL;
2473}
2474
2475/**
2476 * e1000e_free_rx_resources - Free Rx Resources
Bruce Allan55aa6982011-12-16 00:45:45 +00002477 * @rx_ring: Rx descriptor ring
Auke Kokbc7f75f2007-09-17 12:30:59 -07002478 *
2479 * Free all receive software resources
2480 **/
Bruce Allan55aa6982011-12-16 00:45:45 +00002481void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002482{
Bruce Allan55aa6982011-12-16 00:45:45 +00002483 struct e1000_adapter *adapter = rx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002484 struct pci_dev *pdev = adapter->pdev;
Auke Kok47f44e42007-10-25 13:57:44 -07002485 int i;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002486
Bruce Allan55aa6982011-12-16 00:45:45 +00002487 e1000_clean_rx_ring(rx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002488
Bruce Allanb1cdfea2010-12-11 05:53:47 +00002489 for (i = 0; i < rx_ring->count; i++)
Auke Kok47f44e42007-10-25 13:57:44 -07002490 kfree(rx_ring->buffer_info[i].ps_pages);
Auke Kok47f44e42007-10-25 13:57:44 -07002491
Auke Kokbc7f75f2007-09-17 12:30:59 -07002492 vfree(rx_ring->buffer_info);
2493 rx_ring->buffer_info = NULL;
2494
Auke Kokbc7f75f2007-09-17 12:30:59 -07002495 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2496 rx_ring->dma);
2497 rx_ring->desc = NULL;
2498}
2499
2500/**
2501 * e1000_update_itr - update the dynamic ITR value based on statistics
Auke Kok489815c2008-02-21 15:11:07 -08002502 * @adapter: pointer to adapter
2503 * @itr_setting: current adapter->itr
2504 * @packets: the number of packets during this measurement interval
2505 * @bytes: the number of bytes during this measurement interval
2506 *
Auke Kokbc7f75f2007-09-17 12:30:59 -07002507 * Stores a new ITR value based on packets and byte
2508 * counts during the last interrupt. The advantage of per interrupt
2509 * computation is faster updates and more accurate ITR for the current
2510 * traffic pattern. Constants in this function were computed
2511 * based on theoretical maximum wire speed and thresholds were set based
2512 * on testing data as well as attempting to minimize response time
Bruce Allan4662e822008-08-26 18:37:06 -07002513 * while increasing bulk throughput. This functionality is controlled
2514 * by the InterruptThrottleRate module parameter.
Auke Kokbc7f75f2007-09-17 12:30:59 -07002515 **/
Bruce Allan8bb62862013-01-16 08:46:49 +00002516static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002517{
2518 unsigned int retval = itr_setting;
2519
2520 if (packets == 0)
Bruce Allan5015e532012-02-08 02:55:56 +00002521 return itr_setting;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002522
2523 switch (itr_setting) {
2524 case lowest_latency:
2525 /* handle TSO and jumbo frames */
Bruce Allan362e20c2013-02-20 04:05:45 +00002526 if (bytes / packets > 8000)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002527 retval = bulk_latency;
Bruce Allanb1cdfea2010-12-11 05:53:47 +00002528 else if ((packets < 5) && (bytes > 512))
Auke Kokbc7f75f2007-09-17 12:30:59 -07002529 retval = low_latency;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002530 break;
Bruce Allane80bd1d2013-05-01 01:19:46 +00002531 case low_latency: /* 50 usec aka 20000 ints/s */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002532 if (bytes > 10000) {
2533 /* this if handles the TSO accounting */
Bruce Allan362e20c2013-02-20 04:05:45 +00002534 if (bytes / packets > 8000)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002535 retval = bulk_latency;
Bruce Allan362e20c2013-02-20 04:05:45 +00002536 else if ((packets < 10) || ((bytes / packets) > 1200))
Auke Kokbc7f75f2007-09-17 12:30:59 -07002537 retval = bulk_latency;
Bruce Allanb1cdfea2010-12-11 05:53:47 +00002538 else if ((packets > 35))
Auke Kokbc7f75f2007-09-17 12:30:59 -07002539 retval = lowest_latency;
Bruce Allan362e20c2013-02-20 04:05:45 +00002540 } else if (bytes / packets > 2000) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07002541 retval = bulk_latency;
2542 } else if (packets <= 2 && bytes < 512) {
2543 retval = lowest_latency;
2544 }
2545 break;
Bruce Allane80bd1d2013-05-01 01:19:46 +00002546 case bulk_latency: /* 250 usec aka 4000 ints/s */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002547 if (bytes > 25000) {
Bruce Allanb1cdfea2010-12-11 05:53:47 +00002548 if (packets > 35)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002549 retval = low_latency;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002550 } else if (bytes < 6000) {
2551 retval = low_latency;
2552 }
2553 break;
2554 }
2555
Auke Kokbc7f75f2007-09-17 12:30:59 -07002556 return retval;
2557}
2558
2559static void e1000_set_itr(struct e1000_adapter *adapter)
2560{
Auke Kokbc7f75f2007-09-17 12:30:59 -07002561 u16 current_itr;
2562 u32 new_itr = adapter->itr;
2563
2564 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2565 if (adapter->link_speed != SPEED_1000) {
2566 current_itr = 0;
2567 new_itr = 4000;
2568 goto set_itr_now;
2569 }
2570
Bruce Allan828bac82010-09-29 21:39:37 +00002571 if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2572 new_itr = 0;
2573 goto set_itr_now;
2574 }
2575
Bruce Allan8bb62862013-01-16 08:46:49 +00002576 adapter->tx_itr = e1000_update_itr(adapter->tx_itr,
2577 adapter->total_tx_packets,
2578 adapter->total_tx_bytes);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002579 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2580 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2581 adapter->tx_itr = low_latency;
2582
Bruce Allan8bb62862013-01-16 08:46:49 +00002583 adapter->rx_itr = e1000_update_itr(adapter->rx_itr,
2584 adapter->total_rx_packets,
2585 adapter->total_rx_bytes);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002586 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2587 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2588 adapter->rx_itr = low_latency;
2589
2590 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2591
Auke Kokbc7f75f2007-09-17 12:30:59 -07002592 /* counts and packets in update_itr are dependent on these numbers */
Bruce Allan33550ce2013-02-20 04:06:16 +00002593 switch (current_itr) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07002594 case lowest_latency:
2595 new_itr = 70000;
2596 break;
2597 case low_latency:
Bruce Allane80bd1d2013-05-01 01:19:46 +00002598 new_itr = 20000; /* aka hwitr = ~200 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002599 break;
2600 case bulk_latency:
2601 new_itr = 4000;
2602 break;
2603 default:
2604 break;
2605 }
2606
2607set_itr_now:
2608 if (new_itr != adapter->itr) {
Bruce Allane921eb12012-11-28 09:28:37 +00002609 /* this attempts to bias the interrupt rate towards Bulk
Auke Kokbc7f75f2007-09-17 12:30:59 -07002610 * by adding intermediate steps when interrupt rate is
Bruce Allanad680762008-03-28 09:15:03 -07002611 * increasing
2612 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002613 new_itr = new_itr > adapter->itr ?
Bruce Allanf0ff4392013-02-20 04:05:39 +00002614 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002615 adapter->itr = new_itr;
Bruce Allan4662e822008-08-26 18:37:06 -07002616 adapter->rx_ring->itr_val = new_itr;
2617 if (adapter->msix_entries)
2618 adapter->rx_ring->set_itr = 1;
2619 else
Bruce Allane3d14b02012-12-05 06:26:51 +00002620 e1000e_write_itr(adapter, new_itr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002621 }
2622}
2623
2624/**
Matthew Vick22a4cca2012-07-12 00:02:42 +00002625 * e1000e_write_itr - write the ITR value to the appropriate registers
2626 * @adapter: address of board private structure
2627 * @itr: new ITR value to program
2628 *
2629 * e1000e_write_itr determines if the adapter is in MSI-X mode
2630 * and, if so, writes the EITR registers with the ITR value.
2631 * Otherwise, it writes the ITR value into the ITR register.
2632 **/
2633void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr)
2634{
2635 struct e1000_hw *hw = &adapter->hw;
2636 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0;
2637
2638 if (adapter->msix_entries) {
2639 int vector;
2640
2641 for (vector = 0; vector < adapter->num_vectors; vector++)
2642 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector));
2643 } else {
2644 ew32(ITR, new_itr);
2645 }
2646}
2647
2648/**
Bruce Allan4662e822008-08-26 18:37:06 -07002649 * e1000_alloc_queues - Allocate memory for all rings
2650 * @adapter: board private structure to initialize
2651 **/
Bill Pemberton9f9a12f2012-12-03 09:24:25 -05002652static int e1000_alloc_queues(struct e1000_adapter *adapter)
Bruce Allan4662e822008-08-26 18:37:06 -07002653{
Bruce Allan55aa6982011-12-16 00:45:45 +00002654 int size = sizeof(struct e1000_ring);
2655
2656 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
Bruce Allan4662e822008-08-26 18:37:06 -07002657 if (!adapter->tx_ring)
2658 goto err;
Bruce Allan55aa6982011-12-16 00:45:45 +00002659 adapter->tx_ring->count = adapter->tx_ring_count;
2660 adapter->tx_ring->adapter = adapter;
Bruce Allan4662e822008-08-26 18:37:06 -07002661
Bruce Allan55aa6982011-12-16 00:45:45 +00002662 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
Bruce Allan4662e822008-08-26 18:37:06 -07002663 if (!adapter->rx_ring)
2664 goto err;
Bruce Allan55aa6982011-12-16 00:45:45 +00002665 adapter->rx_ring->count = adapter->rx_ring_count;
2666 adapter->rx_ring->adapter = adapter;
Bruce Allan4662e822008-08-26 18:37:06 -07002667
2668 return 0;
2669err:
2670 e_err("Unable to allocate memory for queues\n");
2671 kfree(adapter->rx_ring);
2672 kfree(adapter->tx_ring);
2673 return -ENOMEM;
2674}
2675
2676/**
Bruce Allanc58c8a72012-03-20 03:48:19 +00002677 * e1000e_poll - NAPI Rx polling callback
Bruce Allanad680762008-03-28 09:15:03 -07002678 * @napi: struct associated with this polling callback
Bruce Allanc58c8a72012-03-20 03:48:19 +00002679 * @weight: number of packets driver is allowed to process this poll
Auke Kokbc7f75f2007-09-17 12:30:59 -07002680 **/
Bruce Allanc58c8a72012-03-20 03:48:19 +00002681static int e1000e_poll(struct napi_struct *napi, int weight)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002682{
Bruce Allanc58c8a72012-03-20 03:48:19 +00002683 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2684 napi);
Bruce Allan4662e822008-08-26 18:37:06 -07002685 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002686 struct net_device *poll_dev = adapter->netdev;
Andy Gospodarek679e8a02009-06-18 11:57:37 +00002687 int tx_cleaned = 1, work_done = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002688
Wang Chen4cf16532008-11-12 23:38:14 -08002689 adapter = netdev_priv(poll_dev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002690
Bruce Allanc58c8a72012-03-20 03:48:19 +00002691 if (!adapter->msix_entries ||
2692 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2693 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
Bruce Allan4662e822008-08-26 18:37:06 -07002694
Bruce Allanc58c8a72012-03-20 03:48:19 +00002695 adapter->clean_rx(adapter->rx_ring, &work_done, weight);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002696
Alexander Duyck12d04a32009-03-25 22:05:03 +00002697 if (!tx_cleaned)
Bruce Allanc58c8a72012-03-20 03:48:19 +00002698 work_done = weight;
David S. Millerd2c7ddd2008-01-15 22:43:24 -08002699
Bruce Allanc58c8a72012-03-20 03:48:19 +00002700 /* If weight not fully consumed, exit the polling mode */
2701 if (work_done < weight) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07002702 if (adapter->itr_setting & 3)
2703 e1000_set_itr(adapter);
Ben Hutchings288379f2009-01-19 16:43:59 -08002704 napi_complete(napi);
Jesse Brandeburga3c69fe2009-03-25 22:05:41 +00002705 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2706 if (adapter->msix_entries)
2707 ew32(IMS, adapter->rx_ring->ims_val);
2708 else
2709 e1000_irq_enable(adapter);
2710 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002711 }
2712
2713 return work_done;
2714}
2715
Patrick McHardy80d5c362013-04-19 02:04:28 +00002716static int e1000_vlan_rx_add_vid(struct net_device *netdev,
Bruce Allan603cdca2013-05-01 03:48:11 +00002717 __always_unused __be16 proto, u16 vid)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002718{
2719 struct e1000_adapter *adapter = netdev_priv(netdev);
2720 struct e1000_hw *hw = &adapter->hw;
2721 u32 vfta, index;
2722
2723 /* don't update vlan cookie if already programmed */
2724 if ((adapter->hw.mng_cookie.status &
2725 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2726 (vid == adapter->mng_vlan_id))
Jiri Pirko8e586132011-12-08 19:52:37 -05002727 return 0;
Bruce Allancaaddaf2009-12-01 15:46:43 +00002728
Auke Kokbc7f75f2007-09-17 12:30:59 -07002729 /* add VID to filter table */
Bruce Allancaaddaf2009-12-01 15:46:43 +00002730 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2731 index = (vid >> 5) & 0x7F;
2732 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2733 vfta |= (1 << (vid & 0x1F));
2734 hw->mac.ops.write_vfta(hw, index, vfta);
2735 }
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002736
2737 set_bit(vid, adapter->active_vlans);
Jiri Pirko8e586132011-12-08 19:52:37 -05002738
2739 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002740}
2741
Patrick McHardy80d5c362013-04-19 02:04:28 +00002742static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
Bruce Allan603cdca2013-05-01 03:48:11 +00002743 __always_unused __be16 proto, u16 vid)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002744{
2745 struct e1000_adapter *adapter = netdev_priv(netdev);
2746 struct e1000_hw *hw = &adapter->hw;
2747 u32 vfta, index;
2748
Auke Kokbc7f75f2007-09-17 12:30:59 -07002749 if ((adapter->hw.mng_cookie.status &
2750 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2751 (vid == adapter->mng_vlan_id)) {
2752 /* release control to f/w */
Bruce Allan31dbe5b2011-01-06 14:29:52 +00002753 e1000e_release_hw_control(adapter);
Jiri Pirko8e586132011-12-08 19:52:37 -05002754 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002755 }
2756
2757 /* remove VID from filter table */
Bruce Allancaaddaf2009-12-01 15:46:43 +00002758 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2759 index = (vid >> 5) & 0x7F;
2760 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2761 vfta &= ~(1 << (vid & 0x1F));
2762 hw->mac.ops.write_vfta(hw, index, vfta);
2763 }
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002764
2765 clear_bit(vid, adapter->active_vlans);
Jiri Pirko8e586132011-12-08 19:52:37 -05002766
2767 return 0;
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002768}
2769
2770/**
2771 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2772 * @adapter: board private structure to initialize
2773 **/
2774static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2775{
2776 struct net_device *netdev = adapter->netdev;
2777 struct e1000_hw *hw = &adapter->hw;
2778 u32 rctl;
2779
2780 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2781 /* disable VLAN receive filtering */
2782 rctl = er32(RCTL);
2783 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2784 ew32(RCTL, rctl);
2785
2786 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
Patrick McHardy80d5c362013-04-19 02:04:28 +00002787 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
2788 adapter->mng_vlan_id);
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002789 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2790 }
2791 }
2792}
2793
2794/**
2795 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2796 * @adapter: board private structure to initialize
2797 **/
2798static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2799{
2800 struct e1000_hw *hw = &adapter->hw;
2801 u32 rctl;
2802
2803 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2804 /* enable VLAN receive filtering */
2805 rctl = er32(RCTL);
2806 rctl |= E1000_RCTL_VFE;
2807 rctl &= ~E1000_RCTL_CFIEN;
2808 ew32(RCTL, rctl);
2809 }
2810}
2811
2812/**
2813 * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2814 * @adapter: board private structure to initialize
2815 **/
2816static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2817{
2818 struct e1000_hw *hw = &adapter->hw;
2819 u32 ctrl;
2820
2821 /* disable VLAN tag insert/strip */
2822 ctrl = er32(CTRL);
2823 ctrl &= ~E1000_CTRL_VME;
2824 ew32(CTRL, ctrl);
2825}
2826
2827/**
2828 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2829 * @adapter: board private structure to initialize
2830 **/
2831static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2832{
2833 struct e1000_hw *hw = &adapter->hw;
2834 u32 ctrl;
2835
2836 /* enable VLAN tag insert/strip */
2837 ctrl = er32(CTRL);
2838 ctrl |= E1000_CTRL_VME;
2839 ew32(CTRL, ctrl);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002840}
2841
2842static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2843{
2844 struct net_device *netdev = adapter->netdev;
2845 u16 vid = adapter->hw.mng_cookie.vlan_id;
2846 u16 old_vid = adapter->mng_vlan_id;
2847
Bruce Allane5fe2542013-02-20 04:06:27 +00002848 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
Patrick McHardy80d5c362013-04-19 02:04:28 +00002849 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002850 adapter->mng_vlan_id = vid;
2851 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07002852
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002853 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
Patrick McHardy80d5c362013-04-19 02:04:28 +00002854 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002855}
2856
2857static void e1000_restore_vlan(struct e1000_adapter *adapter)
2858{
2859 u16 vid;
2860
Patrick McHardy80d5c362013-04-19 02:04:28 +00002861 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002862
Jeff Kirsher86d70e52011-03-25 16:01:01 +00002863 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
Patrick McHardy80d5c362013-04-19 02:04:28 +00002864 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002865}
2866
Bruce Allancd791612010-05-10 14:59:51 +00002867static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
Auke Kokbc7f75f2007-09-17 12:30:59 -07002868{
2869 struct e1000_hw *hw = &adapter->hw;
Bruce Allancd791612010-05-10 14:59:51 +00002870 u32 manc, manc2h, mdef, i, j;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002871
2872 if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2873 return;
2874
2875 manc = er32(MANC);
2876
Bruce Allane921eb12012-11-28 09:28:37 +00002877 /* enable receiving management packets to the host. this will probably
Auke Kokbc7f75f2007-09-17 12:30:59 -07002878 * generate destination unreachable messages from the host OS, but
Bruce Allanad680762008-03-28 09:15:03 -07002879 * the packets will be handled on SMBUS
2880 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002881 manc |= E1000_MANC_EN_MNG2HOST;
2882 manc2h = er32(MANC2H);
Bruce Allancd791612010-05-10 14:59:51 +00002883
2884 switch (hw->mac.type) {
2885 default:
2886 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2887 break;
2888 case e1000_82574:
2889 case e1000_82583:
Bruce Allane921eb12012-11-28 09:28:37 +00002890 /* Check if IPMI pass-through decision filter already exists;
Bruce Allancd791612010-05-10 14:59:51 +00002891 * if so, enable it.
2892 */
2893 for (i = 0, j = 0; i < 8; i++) {
2894 mdef = er32(MDEF(i));
2895
2896 /* Ignore filters with anything other than IPMI ports */
Dan Carpenter3b21b502010-06-02 13:43:15 +00002897 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
Bruce Allancd791612010-05-10 14:59:51 +00002898 continue;
2899
2900 /* Enable this decision filter in MANC2H */
2901 if (mdef)
2902 manc2h |= (1 << i);
2903
2904 j |= mdef;
2905 }
2906
2907 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2908 break;
2909
2910 /* Create new decision filter in an empty filter */
2911 for (i = 0, j = 0; i < 8; i++)
2912 if (er32(MDEF(i)) == 0) {
2913 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2914 E1000_MDEF_PORT_664));
2915 manc2h |= (1 << 1);
2916 j++;
2917 break;
2918 }
2919
2920 if (!j)
2921 e_warn("Unable to create IPMI pass-through filter\n");
2922 break;
2923 }
2924
Auke Kokbc7f75f2007-09-17 12:30:59 -07002925 ew32(MANC2H, manc2h);
2926 ew32(MANC, manc);
2927}
2928
2929/**
Bruce Allanaf667a22010-12-31 06:10:01 +00002930 * e1000_configure_tx - Configure Transmit Unit after Reset
Auke Kokbc7f75f2007-09-17 12:30:59 -07002931 * @adapter: board private structure
2932 *
2933 * Configure the Tx unit of the MAC after a reset.
2934 **/
2935static void e1000_configure_tx(struct e1000_adapter *adapter)
2936{
2937 struct e1000_hw *hw = &adapter->hw;
2938 struct e1000_ring *tx_ring = adapter->tx_ring;
2939 u64 tdba;
David Ertmane7e834a2014-01-13 23:19:27 +00002940 u32 tdlen, tctl, tarc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07002941
2942 /* Setup the HW Tx Head and Tail descriptor pointers */
2943 tdba = tx_ring->dma;
2944 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
Bruce Allan1e360522012-03-20 03:48:13 +00002945 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2946 ew32(TDBAH(0), (tdba >> 32));
2947 ew32(TDLEN(0), tdlen);
2948 ew32(TDH(0), 0);
2949 ew32(TDT(0), 0);
2950 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2951 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002952
Auke Kokbc7f75f2007-09-17 12:30:59 -07002953 /* Set the Tx Interrupt Delay register */
2954 ew32(TIDV, adapter->tx_int_delay);
Bruce Allanad680762008-03-28 09:15:03 -07002955 /* Tx irq moderation */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002956 ew32(TADV, adapter->tx_abs_int_delay);
2957
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002958 if (adapter->flags2 & FLAG2_DMA_BURST) {
2959 u32 txdctl = er32(TXDCTL(0));
David Ertman6cf08d12014-04-05 06:07:00 +00002960
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002961 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2962 E1000_TXDCTL_WTHRESH);
Bruce Allane921eb12012-11-28 09:28:37 +00002963 /* set up some performance related parameters to encourage the
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002964 * hardware to use the bus more efficiently in bursts, depends
2965 * on the tx_int_delay to be enabled,
Hiroaki SHIMODA8edc0e62012-10-10 15:34:20 +00002966 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002967 * hthresh = 1 ==> prefetch when one or more available
2968 * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2969 * BEWARE: this seems to work but should be considered first if
Bruce Allanaf667a22010-12-31 06:10:01 +00002970 * there are Tx hangs or other Tx related bugs
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002971 */
2972 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2973 ew32(TXDCTL(0), txdctl);
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002974 }
Bruce Allan56032be2011-12-16 00:46:01 +00002975 /* erratum work around: set txdctl the same for both queues */
2976 ew32(TXDCTL(1), er32(TXDCTL(0)));
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00002977
David Ertmane7e834a2014-01-13 23:19:27 +00002978 /* Program the Transmit Control Register */
2979 tctl = er32(TCTL);
2980 tctl &= ~E1000_TCTL_CT;
2981 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2982 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2983
Auke Kokbc7f75f2007-09-17 12:30:59 -07002984 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002985 tarc = er32(TARC(0));
Bruce Allane921eb12012-11-28 09:28:37 +00002986 /* set the speed mode bit, we'll clear it if we're not at
Bruce Allanad680762008-03-28 09:15:03 -07002987 * gigabit link later
2988 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07002989#define SPEED_MODE_BIT (1 << 21)
2990 tarc |= SPEED_MODE_BIT;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002991 ew32(TARC(0), tarc);
Auke Kokbc7f75f2007-09-17 12:30:59 -07002992 }
2993
2994 /* errata: program both queues to unweighted RR */
2995 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002996 tarc = er32(TARC(0));
Auke Kokbc7f75f2007-09-17 12:30:59 -07002997 tarc |= 1;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07002998 ew32(TARC(0), tarc);
2999 tarc = er32(TARC(1));
Auke Kokbc7f75f2007-09-17 12:30:59 -07003000 tarc |= 1;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07003001 ew32(TARC(1), tarc);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003002 }
3003
Auke Kokbc7f75f2007-09-17 12:30:59 -07003004 /* Setup Transmit Descriptor Settings for eop descriptor */
3005 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
3006
3007 /* only set IDE if we are delaying interrupts using the timers */
3008 if (adapter->tx_int_delay)
3009 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
3010
3011 /* enable Report Status bit */
3012 adapter->txd_cmd |= E1000_TXD_CMD_RS;
3013
David Ertmane7e834a2014-01-13 23:19:27 +00003014 ew32(TCTL, tctl);
3015
Bruce Allan57cde762012-02-22 09:02:58 +00003016 hw->mac.ops.config_collision_dist(hw);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003017}
3018
3019/**
3020 * e1000_setup_rctl - configure the receive control registers
3021 * @adapter: Board private structure
3022 **/
3023#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
3024 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
3025static void e1000_setup_rctl(struct e1000_adapter *adapter)
3026{
3027 struct e1000_hw *hw = &adapter->hw;
3028 u32 rctl, rfctl;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003029 u32 pages = 0;
3030
David Ertmanb20a7742014-03-25 04:27:55 +00003031 /* Workaround Si errata on PCHx - configure jumbo frame flow.
3032 * If jumbo frames not set, program related MAC/PHY registers
3033 * to h/w defaults
3034 */
3035 if (hw->mac.type >= e1000_pch2lan) {
3036 s32 ret_val;
3037
3038 if (adapter->netdev->mtu > ETH_DATA_LEN)
3039 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
3040 else
3041 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
3042
3043 if (ret_val)
3044 e_dbg("failed to enable|disable jumbo frame workaround mode\n");
3045 }
Bruce Allana1ce6472010-09-22 17:16:40 +00003046
Auke Kokbc7f75f2007-09-17 12:30:59 -07003047 /* Program MC offset vector base */
3048 rctl = er32(RCTL);
3049 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
3050 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
Bruce Allanf0ff4392013-02-20 04:05:39 +00003051 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
3052 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003053
3054 /* Do not Store bad packets */
3055 rctl &= ~E1000_RCTL_SBP;
3056
3057 /* Enable Long Packet receive */
3058 if (adapter->netdev->mtu <= ETH_DATA_LEN)
3059 rctl &= ~E1000_RCTL_LPE;
3060 else
3061 rctl |= E1000_RCTL_LPE;
3062
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00003063 /* Some systems expect that the CRC is included in SMBUS traffic. The
3064 * hardware strips the CRC before sending to both SMBUS (BMC) and to
3065 * host memory when this is enabled
3066 */
3067 if (adapter->flags2 & FLAG2_CRC_STRIPPING)
3068 rctl |= E1000_RCTL_SECRC;
Auke Kok5918bd82008-02-12 15:20:24 -08003069
Bruce Allana4f58f52009-06-02 11:29:18 +00003070 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
3071 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
3072 u16 phy_data;
3073
3074 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
3075 phy_data &= 0xfff8;
3076 phy_data |= (1 << 2);
3077 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
3078
3079 e1e_rphy(hw, 22, &phy_data);
3080 phy_data &= 0x0fff;
3081 phy_data |= (1 << 14);
3082 e1e_wphy(hw, 0x10, 0x2823);
3083 e1e_wphy(hw, 0x11, 0x0003);
3084 e1e_wphy(hw, 22, phy_data);
3085 }
3086
Auke Kokbc7f75f2007-09-17 12:30:59 -07003087 /* Setup buffer sizes */
3088 rctl &= ~E1000_RCTL_SZ_4096;
3089 rctl |= E1000_RCTL_BSEX;
3090 switch (adapter->rx_buffer_len) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07003091 case 2048:
3092 default:
3093 rctl |= E1000_RCTL_SZ_2048;
3094 rctl &= ~E1000_RCTL_BSEX;
3095 break;
3096 case 4096:
3097 rctl |= E1000_RCTL_SZ_4096;
3098 break;
3099 case 8192:
3100 rctl |= E1000_RCTL_SZ_8192;
3101 break;
3102 case 16384:
3103 rctl |= E1000_RCTL_SZ_16384;
3104 break;
3105 }
3106
Bruce Allan5f450212011-07-22 06:21:46 +00003107 /* Enable Extended Status in all Receive Descriptors */
3108 rfctl = er32(RFCTL);
3109 rfctl |= E1000_RFCTL_EXTEN;
Matthew Vickf6bd5572012-04-25 08:01:05 +00003110 ew32(RFCTL, rfctl);
Bruce Allan5f450212011-07-22 06:21:46 +00003111
Bruce Allane921eb12012-11-28 09:28:37 +00003112 /* 82571 and greater support packet-split where the protocol
Auke Kokbc7f75f2007-09-17 12:30:59 -07003113 * header is placed in skb->data and the packet data is
3114 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
3115 * In the case of a non-split, skb->data is linearly filled,
3116 * followed by the page buffers. Therefore, skb->data is
3117 * sized to hold the largest protocol header.
3118 *
3119 * allocations using alloc_page take too long for regular MTU
3120 * so only enable packet split for jumbo frames
3121 *
3122 * Using pages when the page size is greater than 16k wastes
3123 * a lot of memory, since we allocate 3 pages at all times
3124 * per packet.
3125 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003126 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
Bruce Allan79d4e902011-12-16 00:46:27 +00003127 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
Auke Kokbc7f75f2007-09-17 12:30:59 -07003128 adapter->rx_ps_pages = pages;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003129 else
3130 adapter->rx_ps_pages = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003131
3132 if (adapter->rx_ps_pages) {
Bruce Allan90da0662011-01-06 07:02:53 +00003133 u32 psrctl = 0;
3134
Auke Kok140a7482007-10-25 13:57:58 -07003135 /* Enable Packet split descriptors */
3136 rctl |= E1000_RCTL_DTYP_PS;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003137
Bruce Allane5fe2542013-02-20 04:06:27 +00003138 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003139
3140 switch (adapter->rx_ps_pages) {
3141 case 3:
Bruce Allane5fe2542013-02-20 04:06:27 +00003142 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT;
3143 /* fall-through */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003144 case 2:
Bruce Allane5fe2542013-02-20 04:06:27 +00003145 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT;
3146 /* fall-through */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003147 case 1:
Bruce Allane5fe2542013-02-20 04:06:27 +00003148 psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003149 break;
3150 }
3151
3152 ew32(PSRCTL, psrctl);
3153 }
3154
Ben Greearcf955e62012-02-11 15:39:51 +00003155 /* This is useful for sniffing bad packets. */
3156 if (adapter->netdev->features & NETIF_F_RXALL) {
3157 /* UPE and MPE will be handled by normal PROMISC logic
Bruce Allane921eb12012-11-28 09:28:37 +00003158 * in e1000e_set_rx_mode
3159 */
Bruce Allane80bd1d2013-05-01 01:19:46 +00003160 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
3161 E1000_RCTL_BAM | /* RX All Bcast Pkts */
3162 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
Ben Greearcf955e62012-02-11 15:39:51 +00003163
Bruce Allane80bd1d2013-05-01 01:19:46 +00003164 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
3165 E1000_RCTL_DPF | /* Allow filtered pause */
3166 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
Ben Greearcf955e62012-02-11 15:39:51 +00003167 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3168 * and that breaks VLANs.
3169 */
3170 }
3171
Auke Kokbc7f75f2007-09-17 12:30:59 -07003172 ew32(RCTL, rctl);
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003173 /* just started the receive unit, no need to restart */
Bruce Allan12d43f72012-12-05 06:26:14 +00003174 adapter->flags &= ~FLAG_RESTART_NOW;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003175}
3176
3177/**
3178 * e1000_configure_rx - Configure Receive Unit after Reset
3179 * @adapter: board private structure
3180 *
3181 * Configure the Rx unit of the MAC after a reset.
3182 **/
3183static void e1000_configure_rx(struct e1000_adapter *adapter)
3184{
3185 struct e1000_hw *hw = &adapter->hw;
3186 struct e1000_ring *rx_ring = adapter->rx_ring;
3187 u64 rdba;
3188 u32 rdlen, rctl, rxcsum, ctrl_ext;
3189
3190 if (adapter->rx_ps_pages) {
3191 /* this is a 32 byte descriptor */
3192 rdlen = rx_ring->count *
Bruce Allanaf667a22010-12-31 06:10:01 +00003193 sizeof(union e1000_rx_desc_packet_split);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003194 adapter->clean_rx = e1000_clean_rx_irq_ps;
3195 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003196 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
Bruce Allan5f450212011-07-22 06:21:46 +00003197 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003198 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3199 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003200 } else {
Bruce Allan5f450212011-07-22 06:21:46 +00003201 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003202 adapter->clean_rx = e1000_clean_rx_irq;
3203 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3204 }
3205
3206 /* disable receives while setting up the descriptors */
3207 rctl = er32(RCTL);
David S. Miller823dcd22011-08-20 10:39:12 -07003208 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3209 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003210 e1e_flush();
Bruce Allan1bba4382011-03-19 00:27:20 +00003211 usleep_range(10000, 20000);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003212
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00003213 if (adapter->flags2 & FLAG2_DMA_BURST) {
Bruce Allane921eb12012-11-28 09:28:37 +00003214 /* set the writeback threshold (only takes effect if the RDTR
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00003215 * is set). set GRAN=1 and write back up to 0x4 worth, and
Bruce Allanaf667a22010-12-31 06:10:01 +00003216 * enable prefetching of 0x20 Rx descriptors
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00003217 * granularity = 01
3218 * wthresh = 04,
3219 * hthresh = 04,
3220 * pthresh = 0x20
3221 */
3222 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3223 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3224
Bruce Allane921eb12012-11-28 09:28:37 +00003225 /* override the delay timers for enabling bursting, only if
Jesse Brandeburg3a3b7582010-09-29 21:38:49 +00003226 * the value was not set by the user via module options
3227 */
3228 if (adapter->rx_int_delay == DEFAULT_RDTR)
3229 adapter->rx_int_delay = BURST_RDTR;
3230 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3231 adapter->rx_abs_int_delay = BURST_RADV;
3232 }
3233
Auke Kokbc7f75f2007-09-17 12:30:59 -07003234 /* set the Receive Delay Timer Register */
3235 ew32(RDTR, adapter->rx_int_delay);
3236
3237 /* irq moderation */
3238 ew32(RADV, adapter->rx_abs_int_delay);
Bruce Allan828bac82010-09-29 21:39:37 +00003239 if ((adapter->itr_setting != 0) && (adapter->itr != 0))
Matthew Vick22a4cca2012-07-12 00:02:42 +00003240 e1000e_write_itr(adapter, adapter->itr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003241
3242 ctrl_ext = er32(CTRL_EXT);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003243 /* Auto-Mask interrupts upon ICR access */
3244 ctrl_ext |= E1000_CTRL_EXT_IAME;
3245 ew32(IAM, 0xffffffff);
3246 ew32(CTRL_EXT, ctrl_ext);
3247 e1e_flush();
3248
Bruce Allane921eb12012-11-28 09:28:37 +00003249 /* Setup the HW Rx Head and Tail Descriptor Pointers and
Bruce Allanad680762008-03-28 09:15:03 -07003250 * the Base and Length of the Rx Descriptor Ring
3251 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003252 rdba = rx_ring->dma;
Bruce Allan1e360522012-03-20 03:48:13 +00003253 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3254 ew32(RDBAH(0), (rdba >> 32));
3255 ew32(RDLEN(0), rdlen);
3256 ew32(RDH(0), 0);
3257 ew32(RDT(0), 0);
3258 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3259 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003260
3261 /* Enable Receive Checksum Offload for TCP and UDP */
3262 rxcsum = er32(RXCSUM);
Bruce Allan2e1706f2012-06-30 20:02:42 +00003263 if (adapter->netdev->features & NETIF_F_RXCSUM)
Auke Kokbc7f75f2007-09-17 12:30:59 -07003264 rxcsum |= E1000_RXCSUM_TUOFL;
Bruce Allan2e1706f2012-06-30 20:02:42 +00003265 else
Auke Kokbc7f75f2007-09-17 12:30:59 -07003266 rxcsum &= ~E1000_RXCSUM_TUOFL;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003267 ew32(RXCSUM, rxcsum);
3268
Bruce Allan3e35d992013-01-12 07:25:22 +00003269 /* With jumbo frames, excessive C-state transition latencies result
3270 * in dropped transactions.
3271 */
3272 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3273 u32 lat =
3274 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 -
3275 adapter->max_frame_size) * 8 / 1000;
3276
3277 if (adapter->flags & FLAG_IS_ICH) {
Bruce Allan53ec5492009-11-20 23:27:40 +00003278 u32 rxdctl = er32(RXDCTL(0));
David Ertman6cf08d12014-04-05 06:07:00 +00003279
Bruce Allan53ec5492009-11-20 23:27:40 +00003280 ew32(RXDCTL(0), rxdctl | 0x3);
Bruce Allan53ec5492009-11-20 23:27:40 +00003281 }
Bruce Allan3e35d992013-01-12 07:25:22 +00003282
3283 pm_qos_update_request(&adapter->netdev->pm_qos_req, lat);
3284 } else {
3285 pm_qos_update_request(&adapter->netdev->pm_qos_req,
3286 PM_QOS_DEFAULT_VALUE);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003287 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07003288
3289 /* Enable Receives */
3290 ew32(RCTL, rctl);
3291}
3292
3293/**
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003294 * e1000e_write_mc_addr_list - write multicast addresses to MTA
Auke Kokbc7f75f2007-09-17 12:30:59 -07003295 * @netdev: network interface device structure
3296 *
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003297 * Writes multicast address list to the MTA hash table.
3298 * Returns: -ENOMEM on failure
3299 * 0 on no addresses written
3300 * X on writing X addresses to MTA
3301 */
3302static int e1000e_write_mc_addr_list(struct net_device *netdev)
Auke Kokbc7f75f2007-09-17 12:30:59 -07003303{
3304 struct e1000_adapter *adapter = netdev_priv(netdev);
3305 struct e1000_hw *hw = &adapter->hw;
Jiri Pirko22bedad32010-04-01 21:22:57 +00003306 struct netdev_hw_addr *ha;
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003307 u8 *mta_list;
3308 int i;
3309
3310 if (netdev_mc_empty(netdev)) {
3311 /* nothing to program, so clear mc list */
3312 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3313 return 0;
3314 }
3315
3316 mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3317 if (!mta_list)
3318 return -ENOMEM;
3319
3320 /* update_mc_addr_list expects a packed array of only addresses. */
3321 i = 0;
3322 netdev_for_each_mc_addr(ha, netdev)
Bruce Allanf0ff4392013-02-20 04:05:39 +00003323 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003324
3325 hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3326 kfree(mta_list);
3327
3328 return netdev_mc_count(netdev);
3329}
3330
3331/**
3332 * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3333 * @netdev: network interface device structure
3334 *
3335 * Writes unicast address list to the RAR table.
3336 * Returns: -ENOMEM on failure/insufficient address space
3337 * 0 on no addresses written
3338 * X on writing X addresses to the RAR table
3339 **/
3340static int e1000e_write_uc_addr_list(struct net_device *netdev)
3341{
3342 struct e1000_adapter *adapter = netdev_priv(netdev);
3343 struct e1000_hw *hw = &adapter->hw;
David Ertmanb3e5bf12014-05-06 03:50:17 +00003344 unsigned int rar_entries;
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003345 int count = 0;
3346
David Ertmanb3e5bf12014-05-06 03:50:17 +00003347 rar_entries = hw->mac.ops.rar_get_count(hw);
3348
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003349 /* save a rar entry for our hardware address */
3350 rar_entries--;
3351
3352 /* save a rar entry for the LAA workaround */
3353 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3354 rar_entries--;
3355
3356 /* return ENOMEM indicating insufficient memory for addresses */
3357 if (netdev_uc_count(netdev) > rar_entries)
3358 return -ENOMEM;
3359
3360 if (!netdev_uc_empty(netdev) && rar_entries) {
3361 struct netdev_hw_addr *ha;
3362
Bruce Allane921eb12012-11-28 09:28:37 +00003363 /* write the addresses in reverse order to avoid write
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003364 * combining
3365 */
3366 netdev_for_each_uc_addr(ha, netdev) {
David Ertmanb3e5bf12014-05-06 03:50:17 +00003367 int rval;
3368
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003369 if (!rar_entries)
3370 break;
David Ertmanb3e5bf12014-05-06 03:50:17 +00003371 rval = hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3372 if (rval < 0)
3373 return -ENOMEM;
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003374 count++;
3375 }
3376 }
3377
3378 /* zero out the remaining RAR entries not used above */
3379 for (; rar_entries > 0; rar_entries--) {
3380 ew32(RAH(rar_entries), 0);
3381 ew32(RAL(rar_entries), 0);
3382 }
3383 e1e_flush();
3384
3385 return count;
3386}
3387
3388/**
3389 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3390 * @netdev: network interface device structure
3391 *
3392 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3393 * address list or the network interface flags are updated. This routine is
3394 * responsible for configuring the hardware for proper unicast, multicast,
3395 * promiscuous mode, and all-multi behavior.
3396 **/
3397static void e1000e_set_rx_mode(struct net_device *netdev)
3398{
3399 struct e1000_adapter *adapter = netdev_priv(netdev);
3400 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003401 u32 rctl;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003402
David Ertman63eb48f2014-02-14 07:16:46 +00003403 if (pm_runtime_suspended(netdev->dev.parent))
3404 return;
3405
Auke Kokbc7f75f2007-09-17 12:30:59 -07003406 /* Check for Promiscuous and All Multicast modes */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003407 rctl = er32(RCTL);
3408
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003409 /* clear the affected bits */
3410 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3411
Auke Kokbc7f75f2007-09-17 12:30:59 -07003412 if (netdev->flags & IFF_PROMISC) {
3413 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
Jeff Kirsher86d70e52011-03-25 16:01:01 +00003414 /* Do not hardware filter VLANs in promisc mode */
3415 e1000e_vlan_filter_disable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003416 } else {
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003417 int count;
Bruce Allan3d3a1672012-02-23 03:13:18 +00003418
Patrick McHardy746b9f02008-07-16 20:15:45 -07003419 if (netdev->flags & IFF_ALLMULTI) {
3420 rctl |= E1000_RCTL_MPE;
Patrick McHardy746b9f02008-07-16 20:15:45 -07003421 } else {
Bruce Allane921eb12012-11-28 09:28:37 +00003422 /* Write addresses to the MTA, if the attempt fails
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003423 * then we should just turn on promiscuous mode so
3424 * that we can at least receive multicast traffic
3425 */
3426 count = e1000e_write_mc_addr_list(netdev);
3427 if (count < 0)
3428 rctl |= E1000_RCTL_MPE;
Patrick McHardy746b9f02008-07-16 20:15:45 -07003429 }
Jeff Kirsher86d70e52011-03-25 16:01:01 +00003430 e1000e_vlan_filter_enable(adapter);
Bruce Allane921eb12012-11-28 09:28:37 +00003431 /* Write addresses to available RAR registers, if there is not
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003432 * sufficient space to store all the addresses then enable
3433 * unicast promiscuous mode
3434 */
3435 count = e1000e_write_uc_addr_list(netdev);
3436 if (count < 0)
3437 rctl |= E1000_RCTL_UPE;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003438 }
3439
3440 ew32(RCTL, rctl);
3441
Patrick McHardyf6469682013-04-19 02:04:27 +00003442 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
Jeff Kirsher86d70e52011-03-25 16:01:01 +00003443 e1000e_vlan_strip_enable(adapter);
3444 else
3445 e1000e_vlan_strip_disable(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003446}
3447
Bruce Allan70495a52012-01-11 01:26:50 +00003448static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3449{
3450 struct e1000_hw *hw = &adapter->hw;
3451 u32 mrqc, rxcsum;
3452 int i;
3453 static const u32 rsskey[10] = {
3454 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3455 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3456 };
3457
3458 /* Fill out hash function seed */
3459 for (i = 0; i < 10; i++)
3460 ew32(RSSRK(i), rsskey[i]);
3461
3462 /* Direct all traffic to queue 0 */
3463 for (i = 0; i < 32; i++)
3464 ew32(RETA(i), 0);
3465
Bruce Allane921eb12012-11-28 09:28:37 +00003466 /* Disable raw packet checksumming so that RSS hash is placed in
Bruce Allan70495a52012-01-11 01:26:50 +00003467 * descriptor on writeback.
3468 */
3469 rxcsum = er32(RXCSUM);
3470 rxcsum |= E1000_RXCSUM_PCSD;
3471
3472 ew32(RXCSUM, rxcsum);
3473
3474 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3475 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3476 E1000_MRQC_RSS_FIELD_IPV6 |
3477 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3478 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3479
3480 ew32(MRQC, mrqc);
3481}
3482
Auke Kokbc7f75f2007-09-17 12:30:59 -07003483/**
Bruce Allanb67e1912012-12-27 08:32:33 +00003484 * e1000e_get_base_timinca - get default SYSTIM time increment attributes
3485 * @adapter: board private structure
3486 * @timinca: pointer to returned time increment attributes
3487 *
3488 * Get attributes for incrementing the System Time Register SYSTIML/H at
3489 * the default base frequency, and set the cyclecounter shift value.
3490 **/
Bruce Alland89777b2013-01-19 01:09:58 +00003491s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
Bruce Allanb67e1912012-12-27 08:32:33 +00003492{
3493 struct e1000_hw *hw = &adapter->hw;
3494 u32 incvalue, incperiod, shift;
3495
3496 /* Make sure clock is enabled on I217 before checking the frequency */
3497 if ((hw->mac.type == e1000_pch_lpt) &&
3498 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) &&
3499 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) {
3500 u32 fextnvm7 = er32(FEXTNVM7);
3501
3502 if (!(fextnvm7 & (1 << 0))) {
3503 ew32(FEXTNVM7, fextnvm7 | (1 << 0));
3504 e1e_flush();
3505 }
3506 }
3507
3508 switch (hw->mac.type) {
3509 case e1000_pch2lan:
3510 case e1000_pch_lpt:
3511 /* On I217, the clock frequency is 25MHz or 96MHz as
3512 * indicated by the System Clock Frequency Indication
3513 */
3514 if ((hw->mac.type != e1000_pch_lpt) ||
3515 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
3516 /* Stable 96MHz frequency */
3517 incperiod = INCPERIOD_96MHz;
3518 incvalue = INCVALUE_96MHz;
3519 shift = INCVALUE_SHIFT_96MHz;
3520 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
3521 break;
3522 }
3523 /* fall-through */
3524 case e1000_82574:
3525 case e1000_82583:
3526 /* Stable 25MHz frequency */
3527 incperiod = INCPERIOD_25MHz;
3528 incvalue = INCVALUE_25MHz;
3529 shift = INCVALUE_SHIFT_25MHz;
3530 adapter->cc.shift = shift;
3531 break;
3532 default:
3533 return -EINVAL;
3534 }
3535
3536 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) |
3537 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK));
3538
3539 return 0;
3540}
3541
3542/**
3543 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable
3544 * @adapter: board private structure
3545 *
3546 * Outgoing time stamping can be enabled and disabled. Play nice and
3547 * disable it when requested, although it shouldn't cause any overhead
3548 * when no packet needs it. At most one packet in the queue may be
3549 * marked for time stamping, otherwise it would be impossible to tell
3550 * for sure to which packet the hardware time stamp belongs.
3551 *
3552 * Incoming time stamping has to be configured via the hardware filters.
3553 * Not all combinations are supported, in particular event type has to be
3554 * specified. Matching the kind of event packet is not supported, with the
3555 * exception of "all V2 events regardless of level 2 or 4".
3556 **/
Ben Hutchings62d7e3a2013-11-14 00:41:38 +00003557static int e1000e_config_hwtstamp(struct e1000_adapter *adapter,
3558 struct hwtstamp_config *config)
Bruce Allanb67e1912012-12-27 08:32:33 +00003559{
3560 struct e1000_hw *hw = &adapter->hw;
Bruce Allanb67e1912012-12-27 08:32:33 +00003561 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
3562 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
Bruce Alland89777b2013-01-19 01:09:58 +00003563 u32 rxmtrl = 0;
3564 u16 rxudp = 0;
3565 bool is_l4 = false;
3566 bool is_l2 = false;
Bruce Allanb67e1912012-12-27 08:32:33 +00003567 u32 regval;
3568 s32 ret_val;
3569
3570 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
3571 return -EINVAL;
3572
3573 /* flags reserved for future extensions - must be zero */
3574 if (config->flags)
3575 return -EINVAL;
3576
3577 switch (config->tx_type) {
3578 case HWTSTAMP_TX_OFF:
3579 tsync_tx_ctl = 0;
3580 break;
3581 case HWTSTAMP_TX_ON:
3582 break;
3583 default:
3584 return -ERANGE;
3585 }
3586
3587 switch (config->rx_filter) {
3588 case HWTSTAMP_FILTER_NONE:
3589 tsync_rx_ctl = 0;
3590 break;
Bruce Alland89777b2013-01-19 01:09:58 +00003591 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3592 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3593 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
3594 is_l4 = true;
3595 break;
3596 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3597 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3598 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
3599 is_l4 = true;
3600 break;
3601 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3602 /* Also time stamps V2 L2 Path Delay Request/Response */
3603 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3604 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3605 is_l2 = true;
3606 break;
3607 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3608 /* Also time stamps V2 L2 Path Delay Request/Response. */
3609 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3610 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3611 is_l2 = true;
3612 break;
3613 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3614 /* Hardware cannot filter just V2 L4 Sync messages;
3615 * fall-through to V2 (both L2 and L4) Sync.
3616 */
3617 case HWTSTAMP_FILTER_PTP_V2_SYNC:
3618 /* Also time stamps V2 Path Delay Request/Response. */
3619 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3620 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3621 is_l2 = true;
3622 is_l4 = true;
3623 break;
3624 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3625 /* Hardware cannot filter just V2 L4 Delay Request messages;
3626 * fall-through to V2 (both L2 and L4) Delay Request.
3627 */
3628 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3629 /* Also time stamps V2 Path Delay Request/Response. */
3630 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3631 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3632 is_l2 = true;
3633 is_l4 = true;
3634 break;
3635 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3636 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3637 /* Hardware cannot filter just V2 L4 or L2 Event messages;
3638 * fall-through to all V2 (both L2 and L4) Events.
3639 */
3640 case HWTSTAMP_FILTER_PTP_V2_EVENT:
3641 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
3642 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
3643 is_l2 = true;
3644 is_l4 = true;
3645 break;
3646 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3647 /* For V1, the hardware can only filter Sync messages or
3648 * Delay Request messages but not both so fall-through to
3649 * time stamp all packets.
3650 */
Bruce Allanb67e1912012-12-27 08:32:33 +00003651 case HWTSTAMP_FILTER_ALL:
Bruce Alland89777b2013-01-19 01:09:58 +00003652 is_l2 = true;
3653 is_l4 = true;
Bruce Allanb67e1912012-12-27 08:32:33 +00003654 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
3655 config->rx_filter = HWTSTAMP_FILTER_ALL;
3656 break;
3657 default:
3658 return -ERANGE;
3659 }
3660
Ben Hutchings62d7e3a2013-11-14 00:41:38 +00003661 adapter->hwtstamp_config = *config;
3662
Bruce Allanb67e1912012-12-27 08:32:33 +00003663 /* enable/disable Tx h/w time stamping */
3664 regval = er32(TSYNCTXCTL);
3665 regval &= ~E1000_TSYNCTXCTL_ENABLED;
3666 regval |= tsync_tx_ctl;
3667 ew32(TSYNCTXCTL, regval);
3668 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) !=
3669 (regval & E1000_TSYNCTXCTL_ENABLED)) {
3670 e_err("Timesync Tx Control register not set as expected\n");
3671 return -EAGAIN;
3672 }
3673
3674 /* enable/disable Rx h/w time stamping */
3675 regval = er32(TSYNCRXCTL);
3676 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
3677 regval |= tsync_rx_ctl;
3678 ew32(TSYNCRXCTL, regval);
3679 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED |
3680 E1000_TSYNCRXCTL_TYPE_MASK)) !=
3681 (regval & (E1000_TSYNCRXCTL_ENABLED |
3682 E1000_TSYNCRXCTL_TYPE_MASK))) {
3683 e_err("Timesync Rx Control register not set as expected\n");
3684 return -EAGAIN;
3685 }
3686
Bruce Alland89777b2013-01-19 01:09:58 +00003687 /* L2: define ethertype filter for time stamped packets */
3688 if (is_l2)
3689 rxmtrl |= ETH_P_1588;
3690
3691 /* define which PTP packets get time stamped */
3692 ew32(RXMTRL, rxmtrl);
3693
3694 /* Filter by destination port */
3695 if (is_l4) {
3696 rxudp = PTP_EV_PORT;
3697 cpu_to_be16s(&rxudp);
3698 }
3699 ew32(RXUDP, rxudp);
3700
3701 e1e_flush();
3702
Bruce Allanb67e1912012-12-27 08:32:33 +00003703 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
Bruce Allan70806a72013-01-05 05:08:37 +00003704 er32(RXSTMPH);
3705 er32(TXSTMPH);
Bruce Allanb67e1912012-12-27 08:32:33 +00003706
3707 /* Get and set the System Time Register SYSTIM base frequency */
3708 ret_val = e1000e_get_base_timinca(adapter, &regval);
3709 if (ret_val)
3710 return ret_val;
3711 ew32(TIMINCA, regval);
3712
3713 /* reset the ns time counter */
3714 timecounter_init(&adapter->tc, &adapter->cc,
3715 ktime_to_ns(ktime_get_real()));
3716
3717 return 0;
3718}
3719
3720/**
Bruce Allanad680762008-03-28 09:15:03 -07003721 * e1000_configure - configure the hardware for Rx and Tx
Auke Kokbc7f75f2007-09-17 12:30:59 -07003722 * @adapter: private board structure
3723 **/
3724static void e1000_configure(struct e1000_adapter *adapter)
3725{
Bruce Allan55aa6982011-12-16 00:45:45 +00003726 struct e1000_ring *rx_ring = adapter->rx_ring;
3727
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00003728 e1000e_set_rx_mode(adapter->netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003729
3730 e1000_restore_vlan(adapter);
Bruce Allancd791612010-05-10 14:59:51 +00003731 e1000_init_manageability_pt(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003732
3733 e1000_configure_tx(adapter);
Bruce Allan70495a52012-01-11 01:26:50 +00003734
3735 if (adapter->netdev->features & NETIF_F_RXHASH)
3736 e1000e_setup_rss_hash(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003737 e1000_setup_rctl(adapter);
3738 e1000_configure_rx(adapter);
Bruce Allan55aa6982011-12-16 00:45:45 +00003739 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003740}
3741
3742/**
3743 * e1000e_power_up_phy - restore link in case the phy was powered down
3744 * @adapter: address of board private structure
3745 *
3746 * The phy may be powered down to save power and turn off link when the
3747 * driver is unloaded and wake on lan is not enabled (among others)
3748 * *** this routine MUST be followed by a call to e1000e_reset ***
3749 **/
3750void e1000e_power_up_phy(struct e1000_adapter *adapter)
3751{
Bruce Allan17f208d2009-12-01 15:47:22 +00003752 if (adapter->hw.phy.ops.power_up)
3753 adapter->hw.phy.ops.power_up(&adapter->hw);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003754
3755 adapter->hw.mac.ops.setup_link(&adapter->hw);
3756}
3757
3758/**
3759 * e1000_power_down_phy - Power down the PHY
3760 *
Bruce Allan17f208d2009-12-01 15:47:22 +00003761 * Power down the PHY so no link is implied when interface is down.
3762 * The PHY cannot be powered down if management or WoL is active.
Auke Kokbc7f75f2007-09-17 12:30:59 -07003763 */
3764static void e1000_power_down_phy(struct e1000_adapter *adapter)
3765{
Bruce Allan17f208d2009-12-01 15:47:22 +00003766 if (adapter->hw.phy.ops.power_down)
3767 adapter->hw.phy.ops.power_down(&adapter->hw);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003768}
3769
3770/**
3771 * e1000e_reset - bring the hardware into a known good state
3772 *
3773 * This function boots the hardware and enables some settings that
3774 * require a configuration cycle of the hardware - those cannot be
3775 * set/changed during runtime. After reset the device needs to be
Bruce Allanad680762008-03-28 09:15:03 -07003776 * properly configured for Rx, Tx etc.
Auke Kokbc7f75f2007-09-17 12:30:59 -07003777 */
3778void e1000e_reset(struct e1000_adapter *adapter)
3779{
3780 struct e1000_mac_info *mac = &adapter->hw.mac;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003781 struct e1000_fc_info *fc = &adapter->hw.fc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003782 struct e1000_hw *hw = &adapter->hw;
3783 u32 tx_space, min_tx_space, min_rx_space;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003784 u32 pba = adapter->pba;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003785 u16 hwm;
3786
Bruce Allanad680762008-03-28 09:15:03 -07003787 /* reset Packet Buffer Allocation to default */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003788 ew32(PBA, pba);
Auke Kokdf762462007-10-25 13:57:53 -07003789
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003790 if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
Bruce Allane921eb12012-11-28 09:28:37 +00003791 /* To maintain wire speed transmits, the Tx FIFO should be
Auke Kokbc7f75f2007-09-17 12:30:59 -07003792 * large enough to accommodate two full transmit packets,
3793 * rounded up to the next 1KB and expressed in KB. Likewise,
3794 * the Rx FIFO should be large enough to accommodate at least
3795 * one full receive packet and is similarly rounded up and
Bruce Allanad680762008-03-28 09:15:03 -07003796 * expressed in KB.
3797 */
Auke Kokdf762462007-10-25 13:57:53 -07003798 pba = er32(PBA);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003799 /* upper 16 bits has Tx packet buffer allocation size in KB */
Auke Kokdf762462007-10-25 13:57:53 -07003800 tx_space = pba >> 16;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003801 /* lower 16 bits has Rx packet buffer allocation size in KB */
Auke Kokdf762462007-10-25 13:57:53 -07003802 pba &= 0xffff;
Bruce Allane921eb12012-11-28 09:28:37 +00003803 /* the Tx fifo also stores 16 bytes of information about the Tx
Bruce Allanad680762008-03-28 09:15:03 -07003804 * but don't include ethernet FCS because hardware appends it
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003805 */
3806 min_tx_space = (adapter->max_frame_size +
Bruce Allane5fe2542013-02-20 04:06:27 +00003807 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003808 min_tx_space = ALIGN(min_tx_space, 1024);
3809 min_tx_space >>= 10;
3810 /* software strips receive CRC, so leave room for it */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07003811 min_rx_space = adapter->max_frame_size;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003812 min_rx_space = ALIGN(min_rx_space, 1024);
3813 min_rx_space >>= 10;
3814
Bruce Allane921eb12012-11-28 09:28:37 +00003815 /* If current Tx allocation is less than the min Tx FIFO size,
Auke Kokbc7f75f2007-09-17 12:30:59 -07003816 * and the min Tx FIFO size is less than the current Rx FIFO
Bruce Allanad680762008-03-28 09:15:03 -07003817 * allocation, take space away from current Rx allocation
3818 */
Auke Kokdf762462007-10-25 13:57:53 -07003819 if ((tx_space < min_tx_space) &&
3820 ((min_tx_space - tx_space) < pba)) {
3821 pba -= min_tx_space - tx_space;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003822
Bruce Allane921eb12012-11-28 09:28:37 +00003823 /* if short on Rx space, Rx wins and must trump Tx
Bruce Allan419e5512012-08-17 06:18:02 +00003824 * adjustment
Bruce Allanad680762008-03-28 09:15:03 -07003825 */
Bruce Allan79d4e902011-12-16 00:46:27 +00003826 if (pba < min_rx_space)
Auke Kokdf762462007-10-25 13:57:53 -07003827 pba = min_rx_space;
Auke Kokbc7f75f2007-09-17 12:30:59 -07003828 }
Auke Kokdf762462007-10-25 13:57:53 -07003829
3830 ew32(PBA, pba);
Auke Kokbc7f75f2007-09-17 12:30:59 -07003831 }
3832
Bruce Allane921eb12012-11-28 09:28:37 +00003833 /* flow control settings
Bruce Allanad680762008-03-28 09:15:03 -07003834 *
Bruce Allan38eb3942009-11-19 12:34:20 +00003835 * The high water mark must be low enough to fit one full frame
Auke Kokbc7f75f2007-09-17 12:30:59 -07003836 * (or the size used for early receive) above it in the Rx FIFO.
3837 * Set it to the lower of:
3838 * - 90% of the Rx FIFO size, and
Bruce Allan38eb3942009-11-19 12:34:20 +00003839 * - the full Rx FIFO size minus one full frame
Bruce Allanad680762008-03-28 09:15:03 -07003840 */
Bruce Alland3738bb2010-06-16 13:27:28 +00003841 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3842 fc->pause_time = 0xFFFF;
3843 else
3844 fc->pause_time = E1000_FC_PAUSE_TIME;
Bruce Allanb20caa82012-02-22 09:03:03 +00003845 fc->send_xon = true;
Bruce Alland3738bb2010-06-16 13:27:28 +00003846 fc->current_mode = fc->requested_mode;
3847
3848 switch (hw->mac.type) {
Bruce Allan79d4e902011-12-16 00:46:27 +00003849 case e1000_ich9lan:
3850 case e1000_ich10lan:
3851 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3852 pba = 14;
3853 ew32(PBA, pba);
3854 fc->high_water = 0x2800;
3855 fc->low_water = fc->high_water - 8;
3856 break;
3857 }
3858 /* fall-through */
Bruce Alland3738bb2010-06-16 13:27:28 +00003859 default:
Bruce Allan79d4e902011-12-16 00:46:27 +00003860 hwm = min(((pba << 10) * 9 / 10),
3861 ((pba << 10) - adapter->max_frame_size));
Bruce Alland3738bb2010-06-16 13:27:28 +00003862
Bruce Allane80bd1d2013-05-01 01:19:46 +00003863 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
Bruce Alland3738bb2010-06-16 13:27:28 +00003864 fc->low_water = fc->high_water - 8;
3865 break;
3866 case e1000_pchlan:
Bruce Allane921eb12012-11-28 09:28:37 +00003867 /* Workaround PCH LOM adapter hangs with certain network
Bruce Allan38eb3942009-11-19 12:34:20 +00003868 * loads. If hangs persist, try disabling Tx flow control.
3869 */
3870 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3871 fc->high_water = 0x3500;
Bruce Allane80bd1d2013-05-01 01:19:46 +00003872 fc->low_water = 0x1500;
Bruce Allan38eb3942009-11-19 12:34:20 +00003873 } else {
3874 fc->high_water = 0x5000;
Bruce Allane80bd1d2013-05-01 01:19:46 +00003875 fc->low_water = 0x3000;
Bruce Allan38eb3942009-11-19 12:34:20 +00003876 }
Bruce Allana3055952010-05-10 15:02:12 +00003877 fc->refresh_time = 0x1000;
Bruce Alland3738bb2010-06-16 13:27:28 +00003878 break;
3879 case e1000_pch2lan:
Bruce Allan2fbe4522012-04-19 03:21:47 +00003880 case e1000_pch_lpt:
Bruce Alland3738bb2010-06-16 13:27:28 +00003881 fc->refresh_time = 0x0400;
Bruce Allan347b5202012-12-08 00:35:35 +00003882
3883 if (adapter->netdev->mtu <= ETH_DATA_LEN) {
3884 fc->high_water = 0x05C20;
3885 fc->low_water = 0x05048;
3886 fc->pause_time = 0x0650;
3887 break;
Bruce Allan828bac82010-09-29 21:39:37 +00003888 }
Bruce Allan347b5202012-12-08 00:35:35 +00003889
Bruce Allance345e02013-06-21 09:07:07 +00003890 pba = 14;
3891 ew32(PBA, pba);
Bruce Allan347b5202012-12-08 00:35:35 +00003892 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
3893 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
Bruce Alland3738bb2010-06-16 13:27:28 +00003894 break;
Bruce Allan38eb3942009-11-19 12:34:20 +00003895 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07003896
Bruce Allane921eb12012-11-28 09:28:37 +00003897 /* Alignment of Tx data is on an arbitrary byte boundary with the
Bruce Alland821a4c2012-08-24 20:38:11 +00003898 * maximum size per Tx descriptor limited only to the transmit
3899 * allocation of the packet buffer minus 96 bytes with an upper
3900 * limit of 24KB due to receive synchronization limitations.
3901 */
3902 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
3903 24 << 10);
3904
Bruce Allane921eb12012-11-28 09:28:37 +00003905 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot
Bruce Allan79d4e902011-12-16 00:46:27 +00003906 * fit in receive buffer.
Bruce Allan828bac82010-09-29 21:39:37 +00003907 */
3908 if (adapter->itr_setting & 0x3) {
Bruce Allan79d4e902011-12-16 00:46:27 +00003909 if ((adapter->max_frame_size * 2) > (pba << 10)) {
Bruce Allan828bac82010-09-29 21:39:37 +00003910 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3911 dev_info(&adapter->pdev->dev,
Bruce Allan17e813e2013-02-20 04:06:01 +00003912 "Interrupt Throttle Rate off\n");
Bruce Allan828bac82010-09-29 21:39:37 +00003913 adapter->flags2 |= FLAG2_DISABLE_AIM;
Matthew Vick22a4cca2012-07-12 00:02:42 +00003914 e1000e_write_itr(adapter, 0);
Bruce Allan828bac82010-09-29 21:39:37 +00003915 }
3916 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3917 dev_info(&adapter->pdev->dev,
Bruce Allan17e813e2013-02-20 04:06:01 +00003918 "Interrupt Throttle Rate on\n");
Bruce Allan828bac82010-09-29 21:39:37 +00003919 adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3920 adapter->itr = 20000;
Matthew Vick22a4cca2012-07-12 00:02:42 +00003921 e1000e_write_itr(adapter, adapter->itr);
Bruce Allan828bac82010-09-29 21:39:37 +00003922 }
3923 }
3924
Auke Kokbc7f75f2007-09-17 12:30:59 -07003925 /* Allow time for pending master requests to run */
3926 mac->ops.reset_hw(hw);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003927
Bruce Allane921eb12012-11-28 09:28:37 +00003928 /* For parts with AMT enabled, let the firmware know
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003929 * that the network interface is in control
3930 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07003931 if (adapter->flags & FLAG_HAS_AMT)
Bruce Allan31dbe5b2011-01-06 14:29:52 +00003932 e1000e_get_hw_control(adapter);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07003933
Auke Kokbc7f75f2007-09-17 12:30:59 -07003934 ew32(WUC, 0);
3935
3936 if (mac->ops.init_hw(hw))
Jeff Kirsher44defeb2008-08-04 17:20:41 -07003937 e_err("Hardware Error\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07003938
3939 e1000_update_mng_vlan(adapter);
3940
3941 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3942 ew32(VET, ETH_P_8021Q);
3943
3944 e1000e_reset_adaptive(hw);
Bruce Allan31dbe5b2011-01-06 14:29:52 +00003945
Bruce Allanb67e1912012-12-27 08:32:33 +00003946 /* initialize systim and reset the ns time counter */
Ben Hutchings62d7e3a2013-11-14 00:41:38 +00003947 e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config);
Bruce Allanb67e1912012-12-27 08:32:33 +00003948
Bruce Alland495bcb2013-03-20 07:23:11 +00003949 /* Set EEE advertisement as appropriate */
3950 if (adapter->flags2 & FLAG2_HAS_EEE) {
3951 s32 ret_val;
3952 u16 adv_addr;
3953
3954 switch (hw->phy.type) {
3955 case e1000_phy_82579:
3956 adv_addr = I82579_EEE_ADVERTISEMENT;
3957 break;
3958 case e1000_phy_i217:
3959 adv_addr = I217_EEE_ADVERTISEMENT;
3960 break;
3961 default:
3962 dev_err(&adapter->pdev->dev,
3963 "Invalid PHY type setting EEE advertisement\n");
3964 return;
3965 }
3966
3967 ret_val = hw->phy.ops.acquire(hw);
3968 if (ret_val) {
3969 dev_err(&adapter->pdev->dev,
3970 "EEE advertisement - unable to acquire PHY\n");
3971 return;
3972 }
3973
3974 e1000_write_emi_reg_locked(hw, adv_addr,
3975 hw->dev_spec.ich8lan.eee_disable ?
3976 0 : adapter->eee_advert);
3977
3978 hw->phy.ops.release(hw);
3979 }
3980
Bruce Allan31dbe5b2011-01-06 14:29:52 +00003981 if (!netif_running(adapter->netdev) &&
David Ertman28002092014-02-14 07:16:41 +00003982 !test_bit(__E1000_TESTING, &adapter->state))
Bruce Allan31dbe5b2011-01-06 14:29:52 +00003983 e1000_power_down_phy(adapter);
Bruce Allan31dbe5b2011-01-06 14:29:52 +00003984
Auke Kokbc7f75f2007-09-17 12:30:59 -07003985 e1000_get_phy_info(hw);
3986
Bruce Allan918d7192009-06-02 11:28:20 +00003987 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3988 !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07003989 u16 phy_data = 0;
Bruce Allane921eb12012-11-28 09:28:37 +00003990 /* speed up time to link by disabling smart power down, ignore
Auke Kokbc7f75f2007-09-17 12:30:59 -07003991 * the return value of this function because there is nothing
Bruce Allanad680762008-03-28 09:15:03 -07003992 * different we would do if it failed
3993 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07003994 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3995 phy_data &= ~IGP02E1000_PM_SPD;
3996 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3997 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07003998}
3999
4000int e1000e_up(struct e1000_adapter *adapter)
4001{
4002 struct e1000_hw *hw = &adapter->hw;
4003
4004 /* hardware has been reset, we need to reload some things */
4005 e1000_configure(adapter);
4006
4007 clear_bit(__E1000_DOWN, &adapter->state);
4008
Bruce Allan4662e822008-08-26 18:37:06 -07004009 if (adapter->msix_entries)
4010 e1000_configure_msix(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004011 e1000_irq_enable(adapter);
4012
Bruce Allan400484f2011-05-13 07:20:03 +00004013 netif_start_queue(adapter->netdev);
Jesse Brandeburg4cb9be72009-04-21 18:42:05 +00004014
Auke Kokbc7f75f2007-09-17 12:30:59 -07004015 /* fire a link change interrupt to start the watchdog */
Bruce Allan52a9b232010-05-10 15:00:10 +00004016 if (adapter->msix_entries)
4017 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
4018 else
4019 ew32(ICS, E1000_ICS_LSC);
4020
Auke Kokbc7f75f2007-09-17 12:30:59 -07004021 return 0;
4022}
4023
Jesse Brandeburg713b3c92011-02-02 10:19:50 +00004024static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
4025{
4026 struct e1000_hw *hw = &adapter->hw;
4027
4028 if (!(adapter->flags2 & FLAG2_DMA_BURST))
4029 return;
4030
4031 /* flush pending descriptor writebacks to memory */
4032 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
4033 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
4034
4035 /* execute the writes immediately */
4036 e1e_flush();
Matthew Vickbf030852012-03-16 09:03:00 +00004037
Bruce Allane921eb12012-11-28 09:28:37 +00004038 /* due to rare timing issues, write to TIDV/RDTR again to ensure the
Matthew Vickbf030852012-03-16 09:03:00 +00004039 * write is successful
4040 */
4041 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
4042 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
4043
4044 /* execute the writes immediately */
4045 e1e_flush();
Jesse Brandeburg713b3c92011-02-02 10:19:50 +00004046}
4047
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00004048static void e1000e_update_stats(struct e1000_adapter *adapter);
4049
David Ertman28002092014-02-14 07:16:41 +00004050/**
4051 * e1000e_down - quiesce the device and optionally reset the hardware
4052 * @adapter: board private structure
4053 * @reset: boolean flag to reset the hardware or not
4054 */
4055void e1000e_down(struct e1000_adapter *adapter, bool reset)
Auke Kokbc7f75f2007-09-17 12:30:59 -07004056{
4057 struct net_device *netdev = adapter->netdev;
4058 struct e1000_hw *hw = &adapter->hw;
4059 u32 tctl, rctl;
4060
Bruce Allane921eb12012-11-28 09:28:37 +00004061 /* signal that we're down so the interrupt handler does not
Bruce Allanad680762008-03-28 09:15:03 -07004062 * reschedule our watchdog timer
4063 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004064 set_bit(__E1000_DOWN, &adapter->state);
4065
4066 /* disable receives in the hardware */
4067 rctl = er32(RCTL);
David S. Miller823dcd22011-08-20 10:39:12 -07004068 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
4069 ew32(RCTL, rctl & ~E1000_RCTL_EN);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004070 /* flush and sleep below */
4071
Jesse Brandeburg4cb9be72009-04-21 18:42:05 +00004072 netif_stop_queue(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004073
4074 /* disable transmits in the hardware */
4075 tctl = er32(TCTL);
4076 tctl &= ~E1000_TCTL_EN;
4077 ew32(TCTL, tctl);
David S. Miller823dcd22011-08-20 10:39:12 -07004078
Auke Kokbc7f75f2007-09-17 12:30:59 -07004079 /* flush both disables and wait for them to finish */
4080 e1e_flush();
Bruce Allan1bba4382011-03-19 00:27:20 +00004081 usleep_range(10000, 20000);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004082
Auke Kokbc7f75f2007-09-17 12:30:59 -07004083 e1000_irq_disable(adapter);
4084
Bruce Allana3b87a42013-04-20 05:37:29 +00004085 napi_synchronize(&adapter->napi);
4086
Auke Kokbc7f75f2007-09-17 12:30:59 -07004087 del_timer_sync(&adapter->watchdog_timer);
4088 del_timer_sync(&adapter->phy_info_timer);
4089
Auke Kokbc7f75f2007-09-17 12:30:59 -07004090 netif_carrier_off(netdev);
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00004091
4092 spin_lock(&adapter->stats64_lock);
4093 e1000e_update_stats(adapter);
4094 spin_unlock(&adapter->stats64_lock);
4095
Bruce Allan400484f2011-05-13 07:20:03 +00004096 e1000e_flush_descriptors(adapter);
Bruce Allan55aa6982011-12-16 00:45:45 +00004097 e1000_clean_tx_ring(adapter->tx_ring);
4098 e1000_clean_rx_ring(adapter->rx_ring);
Bruce Allan400484f2011-05-13 07:20:03 +00004099
Auke Kokbc7f75f2007-09-17 12:30:59 -07004100 adapter->link_speed = 0;
4101 adapter->link_duplex = 0;
4102
Bruce Allanda1e2042013-06-21 09:07:02 +00004103 /* Disable Si errata workaround on PCHx for jumbo frame flow */
4104 if ((hw->mac.type >= e1000_pch2lan) &&
4105 (adapter->netdev->mtu > ETH_DATA_LEN) &&
4106 e1000_lv_jumbo_workaround_ich8lan(hw, false))
4107 e_dbg("failed to disable jumbo frame workaround mode\n");
4108
David Ertman28002092014-02-14 07:16:41 +00004109 if (reset && !pci_channel_offline(adapter->pdev))
Jeff Kirsher52cc3082008-06-24 17:01:29 -07004110 e1000e_reset(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004111}
4112
4113void e1000e_reinit_locked(struct e1000_adapter *adapter)
4114{
4115 might_sleep();
4116 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
Bruce Allan1bba4382011-03-19 00:27:20 +00004117 usleep_range(1000, 2000);
David Ertman28002092014-02-14 07:16:41 +00004118 e1000e_down(adapter, true);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004119 e1000e_up(adapter);
4120 clear_bit(__E1000_RESETTING, &adapter->state);
4121}
4122
4123/**
Bruce Allanb67e1912012-12-27 08:32:33 +00004124 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter)
4125 * @cc: cyclecounter structure
4126 **/
4127static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
4128{
4129 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter,
4130 cc);
4131 struct e1000_hw *hw = &adapter->hw;
Todd Fujinaka5e7ff972014-05-03 06:41:37 +00004132 cycle_t systim, systim_next;
Bruce Allanb67e1912012-12-27 08:32:33 +00004133
4134 /* latch SYSTIMH on read of SYSTIML */
4135 systim = (cycle_t)er32(SYSTIML);
4136 systim |= (cycle_t)er32(SYSTIMH) << 32;
4137
Todd Fujinaka5e7ff972014-05-03 06:41:37 +00004138 if ((hw->mac.type == e1000_82574) || (hw->mac.type == e1000_82583)) {
4139 u64 incvalue, time_delta, rem, temp;
4140 int i;
4141
4142 /* errata for 82574/82583 possible bad bits read from SYSTIMH/L
4143 * check to see that the time is incrementing at a reasonable
4144 * rate and is a multiple of incvalue
4145 */
4146 incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK;
4147 for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) {
4148 /* latch SYSTIMH on read of SYSTIML */
4149 systim_next = (cycle_t)er32(SYSTIML);
4150 systim_next |= (cycle_t)er32(SYSTIMH) << 32;
4151
4152 time_delta = systim_next - systim;
4153 temp = time_delta;
4154 rem = do_div(temp, incvalue);
4155
4156 systim = systim_next;
4157
4158 if ((time_delta < E1000_82574_SYSTIM_EPSILON) &&
4159 (rem == 0))
4160 break;
4161 }
4162 }
Bruce Allanb67e1912012-12-27 08:32:33 +00004163 return systim;
4164}
4165
4166/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07004167 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
4168 * @adapter: board private structure to initialize
4169 *
4170 * e1000_sw_init initializes the Adapter private data structure.
4171 * Fields are initialized based on PCI device information and
4172 * OS network device settings (MTU size).
4173 **/
Bill Pemberton9f9a12f2012-12-03 09:24:25 -05004174static int e1000_sw_init(struct e1000_adapter *adapter)
Auke Kokbc7f75f2007-09-17 12:30:59 -07004175{
Auke Kokbc7f75f2007-09-17 12:30:59 -07004176 struct net_device *netdev = adapter->netdev;
4177
4178 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
4179 adapter->rx_ps_bsize0 = 128;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004180 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4181 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
Bruce Allan55aa6982011-12-16 00:45:45 +00004182 adapter->tx_ring_count = E1000_DEFAULT_TXD;
4183 adapter->rx_ring_count = E1000_DEFAULT_RXD;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004184
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00004185 spin_lock_init(&adapter->stats64_lock);
4186
Bruce Allan4662e822008-08-26 18:37:06 -07004187 e1000e_set_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004188
Bruce Allan4662e822008-08-26 18:37:06 -07004189 if (e1000_alloc_queues(adapter))
4190 return -ENOMEM;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004191
Bruce Allanb67e1912012-12-27 08:32:33 +00004192 /* Setup hardware time stamping cyclecounter */
4193 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
4194 adapter->cc.read = e1000e_cyclecounter_read;
4195 adapter->cc.mask = CLOCKSOURCE_MASK(64);
4196 adapter->cc.mult = 1;
4197 /* cc.shift set in e1000e_get_base_tininca() */
4198
4199 spin_lock_init(&adapter->systim_lock);
4200 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work);
4201 }
4202
Auke Kokbc7f75f2007-09-17 12:30:59 -07004203 /* Explicitly disable IRQ since the NIC can be in any state. */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004204 e1000_irq_disable(adapter);
4205
Auke Kokbc7f75f2007-09-17 12:30:59 -07004206 set_bit(__E1000_DOWN, &adapter->state);
4207 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004208}
4209
4210/**
Bruce Allanf8d59f72008-08-08 18:36:11 -07004211 * e1000_intr_msi_test - Interrupt Handler
4212 * @irq: interrupt number
4213 * @data: pointer to a network interface device structure
4214 **/
Bruce Allan8bb62862013-01-16 08:46:49 +00004215static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data)
Bruce Allanf8d59f72008-08-08 18:36:11 -07004216{
4217 struct net_device *netdev = data;
4218 struct e1000_adapter *adapter = netdev_priv(netdev);
4219 struct e1000_hw *hw = &adapter->hw;
4220 u32 icr = er32(ICR);
4221
Bruce Allan3bb99fe2009-11-20 23:25:07 +00004222 e_dbg("icr is %08X\n", icr);
Bruce Allanf8d59f72008-08-08 18:36:11 -07004223 if (icr & E1000_ICR_RXSEQ) {
4224 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
Bruce Allane921eb12012-11-28 09:28:37 +00004225 /* Force memory writes to complete before acknowledging the
Bruce Allanbc763292012-08-17 06:18:07 +00004226 * interrupt is handled.
4227 */
Bruce Allanf8d59f72008-08-08 18:36:11 -07004228 wmb();
4229 }
4230
4231 return IRQ_HANDLED;
4232}
4233
4234/**
4235 * e1000_test_msi_interrupt - Returns 0 for successful test
4236 * @adapter: board private struct
4237 *
4238 * code flow taken from tg3.c
4239 **/
4240static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
4241{
4242 struct net_device *netdev = adapter->netdev;
4243 struct e1000_hw *hw = &adapter->hw;
4244 int err;
4245
4246 /* poll_enable hasn't been called yet, so don't need disable */
4247 /* clear any pending events */
4248 er32(ICR);
4249
4250 /* free the real vector and request a test handler */
4251 e1000_free_irq(adapter);
Bruce Allan4662e822008-08-26 18:37:06 -07004252 e1000e_reset_interrupt_capability(adapter);
Bruce Allanf8d59f72008-08-08 18:36:11 -07004253
4254 /* Assume that the test fails, if it succeeds then the test
Bruce Allane921eb12012-11-28 09:28:37 +00004255 * MSI irq handler will unset this flag
4256 */
Bruce Allanf8d59f72008-08-08 18:36:11 -07004257 adapter->flags |= FLAG_MSI_TEST_FAILED;
4258
4259 err = pci_enable_msi(adapter->pdev);
4260 if (err)
4261 goto msi_test_failed;
4262
Joe Perchesa0607fd2009-11-18 23:29:17 -08004263 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
Bruce Allanf8d59f72008-08-08 18:36:11 -07004264 netdev->name, netdev);
4265 if (err) {
4266 pci_disable_msi(adapter->pdev);
4267 goto msi_test_failed;
4268 }
4269
Bruce Allane921eb12012-11-28 09:28:37 +00004270 /* Force memory writes to complete before enabling and firing an
Bruce Allanbc763292012-08-17 06:18:07 +00004271 * interrupt.
4272 */
Bruce Allanf8d59f72008-08-08 18:36:11 -07004273 wmb();
4274
4275 e1000_irq_enable(adapter);
4276
4277 /* fire an unusual interrupt on the test handler */
4278 ew32(ICS, E1000_ICS_RXSEQ);
4279 e1e_flush();
Prasanna S Panchamukhi569a3af2012-04-19 17:01:00 +00004280 msleep(100);
Bruce Allanf8d59f72008-08-08 18:36:11 -07004281
4282 e1000_irq_disable(adapter);
4283
Bruce Allanbc763292012-08-17 06:18:07 +00004284 rmb(); /* read flags after interrupt has been fired */
Bruce Allanf8d59f72008-08-08 18:36:11 -07004285
4286 if (adapter->flags & FLAG_MSI_TEST_FAILED) {
Bruce Allan4662e822008-08-26 18:37:06 -07004287 adapter->int_mode = E1000E_INT_MODE_LEGACY;
Jean Delvare068e8a32010-09-12 22:45:39 +00004288 e_info("MSI interrupt test failed, using legacy interrupt.\n");
Bruce Allan24b706b2012-01-31 06:37:22 +00004289 } else {
Jean Delvare068e8a32010-09-12 22:45:39 +00004290 e_dbg("MSI interrupt test succeeded!\n");
Bruce Allan24b706b2012-01-31 06:37:22 +00004291 }
Bruce Allanf8d59f72008-08-08 18:36:11 -07004292
4293 free_irq(adapter->pdev->irq, netdev);
4294 pci_disable_msi(adapter->pdev);
4295
Bruce Allanf8d59f72008-08-08 18:36:11 -07004296msi_test_failed:
Bruce Allan4662e822008-08-26 18:37:06 -07004297 e1000e_set_interrupt_capability(adapter);
Jean Delvare068e8a32010-09-12 22:45:39 +00004298 return e1000_request_irq(adapter);
Bruce Allanf8d59f72008-08-08 18:36:11 -07004299}
4300
4301/**
4302 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
4303 * @adapter: board private struct
4304 *
4305 * code flow taken from tg3.c, called with e1000 interrupts disabled.
4306 **/
4307static int e1000_test_msi(struct e1000_adapter *adapter)
4308{
4309 int err;
4310 u16 pci_cmd;
4311
4312 if (!(adapter->flags & FLAG_MSI_ENABLED))
4313 return 0;
4314
4315 /* disable SERR in case the MSI write causes a master abort */
4316 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
Dean Nelson36f24072010-06-29 18:12:05 +00004317 if (pci_cmd & PCI_COMMAND_SERR)
4318 pci_write_config_word(adapter->pdev, PCI_COMMAND,
4319 pci_cmd & ~PCI_COMMAND_SERR);
Bruce Allanf8d59f72008-08-08 18:36:11 -07004320
4321 err = e1000_test_msi_interrupt(adapter);
4322
Dean Nelson36f24072010-06-29 18:12:05 +00004323 /* re-enable SERR */
4324 if (pci_cmd & PCI_COMMAND_SERR) {
4325 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4326 pci_cmd |= PCI_COMMAND_SERR;
4327 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
4328 }
Bruce Allanf8d59f72008-08-08 18:36:11 -07004329
Bruce Allanf8d59f72008-08-08 18:36:11 -07004330 return err;
4331}
4332
4333/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07004334 * e1000_open - Called when a network interface is made active
4335 * @netdev: network interface device structure
4336 *
4337 * Returns 0 on success, negative value on failure
4338 *
4339 * The open entry point is called when a network interface is made
4340 * active by the system (IFF_UP). At this point all resources needed
4341 * for transmit and receive operations are allocated, the interrupt
4342 * handler is registered with the OS, the watchdog timer is started,
4343 * and the stack is notified that the interface is ready.
4344 **/
4345static int e1000_open(struct net_device *netdev)
4346{
4347 struct e1000_adapter *adapter = netdev_priv(netdev);
4348 struct e1000_hw *hw = &adapter->hw;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004349 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004350 int err;
4351
4352 /* disallow open during test */
4353 if (test_bit(__E1000_TESTING, &adapter->state))
4354 return -EBUSY;
4355
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004356 pm_runtime_get_sync(&pdev->dev);
4357
Jesse Brandeburg9c563d22009-04-17 20:44:34 +00004358 netif_carrier_off(netdev);
4359
Auke Kokbc7f75f2007-09-17 12:30:59 -07004360 /* allocate transmit descriptors */
Bruce Allan55aa6982011-12-16 00:45:45 +00004361 err = e1000e_setup_tx_resources(adapter->tx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004362 if (err)
4363 goto err_setup_tx;
4364
4365 /* allocate receive descriptors */
Bruce Allan55aa6982011-12-16 00:45:45 +00004366 err = e1000e_setup_rx_resources(adapter->rx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004367 if (err)
4368 goto err_setup_rx;
4369
Bruce Allane921eb12012-11-28 09:28:37 +00004370 /* If AMT is enabled, let the firmware know that the network
Bruce Allan11b08be2010-05-10 14:59:31 +00004371 * interface is now open and reset the part to a known state.
4372 */
4373 if (adapter->flags & FLAG_HAS_AMT) {
Bruce Allan31dbe5b2011-01-06 14:29:52 +00004374 e1000e_get_hw_control(adapter);
Bruce Allan11b08be2010-05-10 14:59:31 +00004375 e1000e_reset(adapter);
4376 }
4377
Auke Kokbc7f75f2007-09-17 12:30:59 -07004378 e1000e_power_up_phy(adapter);
4379
4380 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
Bruce Allane5fe2542013-02-20 04:06:27 +00004381 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
Auke Kokbc7f75f2007-09-17 12:30:59 -07004382 e1000_update_mng_vlan(adapter);
4383
Bruce Allan79d4e902011-12-16 00:46:27 +00004384 /* DMA latency requirement to workaround jumbo issue */
Bruce Allan3e35d992013-01-12 07:25:22 +00004385 pm_qos_add_request(&adapter->netdev->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
4386 PM_QOS_DEFAULT_VALUE);
Florian Micklerc128ec22010-08-02 14:27:00 +00004387
Bruce Allane921eb12012-11-28 09:28:37 +00004388 /* before we allocate an interrupt, we must be ready to handle it.
Auke Kokbc7f75f2007-09-17 12:30:59 -07004389 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
4390 * as soon as we call pci_request_irq, so we have to setup our
Bruce Allanad680762008-03-28 09:15:03 -07004391 * clean_rx handler before we do so.
4392 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004393 e1000_configure(adapter);
4394
4395 err = e1000_request_irq(adapter);
4396 if (err)
4397 goto err_req_irq;
4398
Bruce Allane921eb12012-11-28 09:28:37 +00004399 /* Work around PCIe errata with MSI interrupts causing some chipsets to
Bruce Allanf8d59f72008-08-08 18:36:11 -07004400 * ignore e1000e MSI messages, which means we need to test our MSI
4401 * interrupt now
4402 */
Bruce Allan4662e822008-08-26 18:37:06 -07004403 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
Bruce Allanf8d59f72008-08-08 18:36:11 -07004404 err = e1000_test_msi(adapter);
4405 if (err) {
4406 e_err("Interrupt allocation failed\n");
4407 goto err_req_irq;
4408 }
4409 }
4410
Auke Kokbc7f75f2007-09-17 12:30:59 -07004411 /* From here on the code is the same as e1000e_up() */
4412 clear_bit(__E1000_DOWN, &adapter->state);
4413
4414 napi_enable(&adapter->napi);
4415
4416 e1000_irq_enable(adapter);
4417
Jeff Kirsher09357b02011-11-18 14:25:00 +00004418 adapter->tx_hang_recheck = false;
Jesse Brandeburg4cb9be72009-04-21 18:42:05 +00004419 netif_start_queue(netdev);
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07004420
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00004421 hw->mac.get_link_status = true;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004422 pm_runtime_put(&pdev->dev);
4423
Auke Kokbc7f75f2007-09-17 12:30:59 -07004424 /* fire a link status change interrupt to start the watchdog */
Bruce Allan52a9b232010-05-10 15:00:10 +00004425 if (adapter->msix_entries)
4426 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
4427 else
4428 ew32(ICS, E1000_ICS_LSC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004429
4430 return 0;
4431
4432err_req_irq:
Bruce Allan31dbe5b2011-01-06 14:29:52 +00004433 e1000e_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004434 e1000_power_down_phy(adapter);
Bruce Allan55aa6982011-12-16 00:45:45 +00004435 e1000e_free_rx_resources(adapter->rx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004436err_setup_rx:
Bruce Allan55aa6982011-12-16 00:45:45 +00004437 e1000e_free_tx_resources(adapter->tx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004438err_setup_tx:
4439 e1000e_reset(adapter);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004440 pm_runtime_put_sync(&pdev->dev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004441
4442 return err;
4443}
4444
4445/**
4446 * e1000_close - Disables a network interface
4447 * @netdev: network interface device structure
4448 *
4449 * Returns 0, this is not allowed to fail
4450 *
4451 * The close entry point is called when an interface is de-activated
4452 * by the OS. The hardware is still under the drivers control, but
4453 * needs to be disabled. A global MAC reset is issued to stop the
4454 * hardware, and all transmit and receive resources are freed.
4455 **/
4456static int e1000_close(struct net_device *netdev)
4457{
4458 struct e1000_adapter *adapter = netdev_priv(netdev);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004459 struct pci_dev *pdev = adapter->pdev;
Bruce Allanbb9e44d2012-03-21 00:39:12 +00004460 int count = E1000_CHECK_RESET_COUNT;
4461
4462 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
4463 usleep_range(10000, 20000);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004464
4465 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004466
4467 pm_runtime_get_sync(&pdev->dev);
4468
4469 if (!test_bit(__E1000_DOWN, &adapter->state)) {
David Ertman28002092014-02-14 07:16:41 +00004470 e1000e_down(adapter, true);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004471 e1000_free_irq(adapter);
David Ertman63eb48f2014-02-14 07:16:46 +00004472
4473 /* Link status message must follow this format */
4474 pr_info("%s NIC Link is Down\n", adapter->netdev->name);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004475 }
Bruce Allana3b87a42013-04-20 05:37:29 +00004476
4477 napi_disable(&adapter->napi);
4478
Bruce Allan55aa6982011-12-16 00:45:45 +00004479 e1000e_free_tx_resources(adapter->tx_ring);
4480 e1000e_free_rx_resources(adapter->rx_ring);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004481
Bruce Allane921eb12012-11-28 09:28:37 +00004482 /* kill manageability vlan ID if supported, but not if a vlan with
Bruce Allanad680762008-03-28 09:15:03 -07004483 * the same ID is registered on the host OS (let 8021q kill it)
4484 */
Bruce Allane5fe2542013-02-20 04:06:27 +00004485 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
Patrick McHardy80d5c362013-04-19 02:04:28 +00004486 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
4487 adapter->mng_vlan_id);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004488
Bruce Allane921eb12012-11-28 09:28:37 +00004489 /* If AMT is enabled, let the firmware know that the network
Bruce Allanad680762008-03-28 09:15:03 -07004490 * interface is now closed
4491 */
Bruce Allan31dbe5b2011-01-06 14:29:52 +00004492 if ((adapter->flags & FLAG_HAS_AMT) &&
4493 !test_bit(__E1000_TESTING, &adapter->state))
4494 e1000e_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004495
Bruce Allan3e35d992013-01-12 07:25:22 +00004496 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
Florian Micklerc128ec22010-08-02 14:27:00 +00004497
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004498 pm_runtime_put_sync(&pdev->dev);
4499
Auke Kokbc7f75f2007-09-17 12:30:59 -07004500 return 0;
4501}
Bruce Allanfc830b72013-02-20 04:06:11 +00004502
Auke Kokbc7f75f2007-09-17 12:30:59 -07004503/**
4504 * e1000_set_mac - Change the Ethernet Address of the NIC
4505 * @netdev: network interface device structure
4506 * @p: pointer to an address structure
4507 *
4508 * Returns 0 on success, negative on failure
4509 **/
4510static int e1000_set_mac(struct net_device *netdev, void *p)
4511{
4512 struct e1000_adapter *adapter = netdev_priv(netdev);
Bruce Allan69e1e012012-04-14 03:28:50 +00004513 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004514 struct sockaddr *addr = p;
4515
4516 if (!is_valid_ether_addr(addr->sa_data))
4517 return -EADDRNOTAVAIL;
4518
4519 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4520 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4521
Bruce Allan69e1e012012-04-14 03:28:50 +00004522 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004523
4524 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4525 /* activate the work around */
4526 e1000e_set_laa_state_82571(&adapter->hw, 1);
4527
Bruce Allane921eb12012-11-28 09:28:37 +00004528 /* Hold a copy of the LAA in RAR[14] This is done so that
Auke Kokbc7f75f2007-09-17 12:30:59 -07004529 * between the time RAR[0] gets clobbered and the time it
4530 * gets fixed (in e1000_watchdog), the actual LAA is in one
4531 * of the RARs and no incoming packets directed to this port
4532 * are dropped. Eventually the LAA will be in RAR[0] and
Bruce Allanad680762008-03-28 09:15:03 -07004533 * RAR[14]
4534 */
Bruce Allan69e1e012012-04-14 03:28:50 +00004535 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4536 adapter->hw.mac.rar_entry_count - 1);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004537 }
4538
4539 return 0;
4540}
4541
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07004542/**
4543 * e1000e_update_phy_task - work thread to update phy
4544 * @work: pointer to our work struct
4545 *
4546 * this worker thread exists because we must acquire a
4547 * semaphore to read the phy, which we could msleep while
4548 * waiting for it, and we can't msleep in a timer.
4549 **/
4550static void e1000e_update_phy_task(struct work_struct *work)
4551{
4552 struct e1000_adapter *adapter = container_of(work,
Bruce Allan17e813e2013-02-20 04:06:01 +00004553 struct e1000_adapter,
4554 update_phy_task);
David Ertmana03206e2014-01-24 23:07:48 +00004555 struct e1000_hw *hw = &adapter->hw;
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00004556
4557 if (test_bit(__E1000_DOWN, &adapter->state))
4558 return;
4559
David Ertmana03206e2014-01-24 23:07:48 +00004560 e1000_get_phy_info(hw);
4561
4562 /* Enable EEE on 82579 after link up */
David Ertman50844bb2014-05-13 00:06:26 +00004563 if (hw->phy.type >= e1000_phy_82579)
David Ertmana03206e2014-01-24 23:07:48 +00004564 e1000_set_eee_pchlan(hw);
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07004565}
4566
Bruce Allane921eb12012-11-28 09:28:37 +00004567/**
4568 * e1000_update_phy_info - timre call-back to update PHY info
4569 * @data: pointer to adapter cast into an unsigned long
4570 *
Bruce Allanad680762008-03-28 09:15:03 -07004571 * Need to wait a few seconds after link up to get diagnostic information from
4572 * the phy
Bruce Allane921eb12012-11-28 09:28:37 +00004573 **/
Auke Kokbc7f75f2007-09-17 12:30:59 -07004574static void e1000_update_phy_info(unsigned long data)
4575{
Bruce Allan53aa82d2013-02-20 04:06:06 +00004576 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00004577
4578 if (test_bit(__E1000_DOWN, &adapter->state))
4579 return;
4580
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07004581 schedule_work(&adapter->update_phy_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004582}
4583
4584/**
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004585 * e1000e_update_phy_stats - Update the PHY statistics counters
4586 * @adapter: board private structure
Bruce Allan2b6b1682011-05-13 07:20:09 +00004587 *
4588 * Read/clear the upper 16-bit PHY registers and read/accumulate lower
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004589 **/
4590static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4591{
4592 struct e1000_hw *hw = &adapter->hw;
4593 s32 ret_val;
4594 u16 phy_data;
4595
4596 ret_val = hw->phy.ops.acquire(hw);
4597 if (ret_val)
4598 return;
4599
Bruce Allane921eb12012-11-28 09:28:37 +00004600 /* A page set is expensive so check if already on desired page.
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004601 * If not, set to the page with the PHY status registers.
4602 */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004603 hw->phy.addr = 1;
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004604 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4605 &phy_data);
4606 if (ret_val)
4607 goto release;
Bruce Allan2b6b1682011-05-13 07:20:09 +00004608 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4609 ret_val = hw->phy.ops.set_page(hw,
4610 HV_STATS_PAGE << IGP_PAGE_SHIFT);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004611 if (ret_val)
4612 goto release;
4613 }
4614
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004615 /* Single Collision Count */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004616 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4617 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004618 if (!ret_val)
4619 adapter->stats.scc += phy_data;
4620
4621 /* Excessive Collision Count */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004622 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4623 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004624 if (!ret_val)
4625 adapter->stats.ecol += phy_data;
4626
4627 /* Multiple Collision Count */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004628 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4629 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004630 if (!ret_val)
4631 adapter->stats.mcc += phy_data;
4632
4633 /* Late Collision Count */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004634 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4635 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004636 if (!ret_val)
4637 adapter->stats.latecol += phy_data;
4638
4639 /* Collision Count - also used for adaptive IFS */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004640 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4641 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004642 if (!ret_val)
4643 hw->mac.collision_delta = phy_data;
4644
4645 /* Defer Count */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004646 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4647 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004648 if (!ret_val)
4649 adapter->stats.dc += phy_data;
4650
4651 /* Transmit with no CRS */
Bruce Allan2b6b1682011-05-13 07:20:09 +00004652 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4653 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004654 if (!ret_val)
4655 adapter->stats.tncrs += phy_data;
4656
4657release:
4658 hw->phy.ops.release(hw);
4659}
4660
4661/**
Auke Kokbc7f75f2007-09-17 12:30:59 -07004662 * e1000e_update_stats - Update the board statistics counters
4663 * @adapter: board private structure
4664 **/
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00004665static void e1000e_update_stats(struct e1000_adapter *adapter)
Auke Kokbc7f75f2007-09-17 12:30:59 -07004666{
Ajit Khaparde7274c202009-10-07 02:44:26 +00004667 struct net_device *netdev = adapter->netdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004668 struct e1000_hw *hw = &adapter->hw;
4669 struct pci_dev *pdev = adapter->pdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004670
Bruce Allane921eb12012-11-28 09:28:37 +00004671 /* Prevent stats update while adapter is being reset, or if the pci
Auke Kokbc7f75f2007-09-17 12:30:59 -07004672 * connection is down.
4673 */
4674 if (adapter->link_speed == 0)
4675 return;
4676 if (pci_channel_offline(pdev))
4677 return;
4678
Auke Kokbc7f75f2007-09-17 12:30:59 -07004679 adapter->stats.crcerrs += er32(CRCERRS);
4680 adapter->stats.gprc += er32(GPRC);
Bruce Allan7c257692008-04-23 11:09:00 -07004681 adapter->stats.gorc += er32(GORCL);
Bruce Allane80bd1d2013-05-01 01:19:46 +00004682 er32(GORCH); /* Clear gorc */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004683 adapter->stats.bprc += er32(BPRC);
4684 adapter->stats.mprc += er32(MPRC);
4685 adapter->stats.roc += er32(ROC);
4686
Auke Kokbc7f75f2007-09-17 12:30:59 -07004687 adapter->stats.mpc += er32(MPC);
Bruce Allana4f58f52009-06-02 11:29:18 +00004688
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004689 /* Half-duplex statistics */
4690 if (adapter->link_duplex == HALF_DUPLEX) {
4691 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4692 e1000e_update_phy_stats(adapter);
4693 } else {
4694 adapter->stats.scc += er32(SCC);
4695 adapter->stats.ecol += er32(ECOL);
4696 adapter->stats.mcc += er32(MCC);
4697 adapter->stats.latecol += er32(LATECOL);
4698 adapter->stats.dc += er32(DC);
Bruce Allana4f58f52009-06-02 11:29:18 +00004699
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004700 hw->mac.collision_delta = er32(COLC);
Bruce Allana4f58f52009-06-02 11:29:18 +00004701
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004702 if ((hw->mac.type != e1000_82574) &&
4703 (hw->mac.type != e1000_82583))
4704 adapter->stats.tncrs += er32(TNCRS);
4705 }
4706 adapter->stats.colc += hw->mac.collision_delta;
Bruce Allana4f58f52009-06-02 11:29:18 +00004707 }
Bruce Allan8c7bbb92010-06-16 13:26:41 +00004708
Auke Kokbc7f75f2007-09-17 12:30:59 -07004709 adapter->stats.xonrxc += er32(XONRXC);
4710 adapter->stats.xontxc += er32(XONTXC);
4711 adapter->stats.xoffrxc += er32(XOFFRXC);
4712 adapter->stats.xofftxc += er32(XOFFTXC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004713 adapter->stats.gptc += er32(GPTC);
Bruce Allan7c257692008-04-23 11:09:00 -07004714 adapter->stats.gotc += er32(GOTCL);
Bruce Allane80bd1d2013-05-01 01:19:46 +00004715 er32(GOTCH); /* Clear gotc */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004716 adapter->stats.rnbc += er32(RNBC);
4717 adapter->stats.ruc += er32(RUC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004718
4719 adapter->stats.mptc += er32(MPTC);
4720 adapter->stats.bptc += er32(BPTC);
4721
4722 /* used for adaptive IFS */
4723
4724 hw->mac.tx_packet_delta = er32(TPT);
4725 adapter->stats.tpt += hw->mac.tx_packet_delta;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004726
4727 adapter->stats.algnerrc += er32(ALGNERRC);
4728 adapter->stats.rxerrc += er32(RXERRC);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004729 adapter->stats.cexterr += er32(CEXTERR);
4730 adapter->stats.tsctc += er32(TSCTC);
4731 adapter->stats.tsctfc += er32(TSCTFC);
4732
Auke Kokbc7f75f2007-09-17 12:30:59 -07004733 /* Fill out the OS statistics structure */
Ajit Khaparde7274c202009-10-07 02:44:26 +00004734 netdev->stats.multicast = adapter->stats.mprc;
4735 netdev->stats.collisions = adapter->stats.colc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004736
4737 /* Rx Errors */
4738
Bruce Allane921eb12012-11-28 09:28:37 +00004739 /* RLEC on some newer hardware can be incorrect so build
Bruce Allanad680762008-03-28 09:15:03 -07004740 * our own version based on RUC and ROC
4741 */
Ajit Khaparde7274c202009-10-07 02:44:26 +00004742 netdev->stats.rx_errors = adapter->stats.rxerrc +
Bruce Allanf0ff4392013-02-20 04:05:39 +00004743 adapter->stats.crcerrs + adapter->stats.algnerrc +
4744 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
Ajit Khaparde7274c202009-10-07 02:44:26 +00004745 netdev->stats.rx_length_errors = adapter->stats.ruc +
Bruce Allanf0ff4392013-02-20 04:05:39 +00004746 adapter->stats.roc;
Ajit Khaparde7274c202009-10-07 02:44:26 +00004747 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4748 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4749 netdev->stats.rx_missed_errors = adapter->stats.mpc;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004750
4751 /* Tx Errors */
Bruce Allanf0ff4392013-02-20 04:05:39 +00004752 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol;
Ajit Khaparde7274c202009-10-07 02:44:26 +00004753 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4754 netdev->stats.tx_window_errors = adapter->stats.latecol;
4755 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004756
4757 /* Tx Dropped needs to be maintained elsewhere */
4758
Auke Kokbc7f75f2007-09-17 12:30:59 -07004759 /* Management Stats */
4760 adapter->stats.mgptc += er32(MGTPTC);
4761 adapter->stats.mgprc += er32(MGTPRC);
4762 adapter->stats.mgpdc += er32(MGTPDC);
Bruce Allan94fb8482013-01-23 09:00:03 +00004763
4764 /* Correctable ECC Errors */
4765 if (hw->mac.type == e1000_pch_lpt) {
4766 u32 pbeccsts = er32(PBECCSTS);
David Ertman6cf08d12014-04-05 06:07:00 +00004767
Bruce Allan94fb8482013-01-23 09:00:03 +00004768 adapter->corr_errors +=
4769 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
4770 adapter->uncorr_errors +=
4771 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
4772 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
4773 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07004774}
4775
Bruce Allan7c257692008-04-23 11:09:00 -07004776/**
4777 * e1000_phy_read_status - Update the PHY register status snapshot
4778 * @adapter: board private structure
4779 **/
4780static void e1000_phy_read_status(struct e1000_adapter *adapter)
4781{
4782 struct e1000_hw *hw = &adapter->hw;
4783 struct e1000_phy_regs *phy = &adapter->phy_regs;
Bruce Allan7c257692008-04-23 11:09:00 -07004784
Bruce Allan97390ab2013-06-29 07:42:25 +00004785 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) &&
4786 (er32(STATUS) & E1000_STATUS_LU) &&
Bruce Allan7c257692008-04-23 11:09:00 -07004787 (adapter->hw.phy.media_type == e1000_media_type_copper)) {
Bruce Allan90da0662011-01-06 07:02:53 +00004788 int ret_val;
4789
Bruce Allanc2ade1a2013-01-16 08:54:35 +00004790 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr);
4791 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr);
4792 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise);
4793 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa);
4794 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion);
4795 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000);
4796 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000);
4797 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus);
Bruce Allan7c257692008-04-23 11:09:00 -07004798 if (ret_val)
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004799 e_warn("Error reading PHY register\n");
Bruce Allan7c257692008-04-23 11:09:00 -07004800 } else {
Bruce Allane921eb12012-11-28 09:28:37 +00004801 /* Do not read PHY registers if link is not up
Bruce Allan7c257692008-04-23 11:09:00 -07004802 * Set values to typical power-on defaults
4803 */
4804 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4805 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4806 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4807 BMSR_ERCAP);
4808 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4809 ADVERTISE_ALL | ADVERTISE_CSMA);
4810 phy->lpa = 0;
4811 phy->expansion = EXPANSION_ENABLENPAGE;
4812 phy->ctrl1000 = ADVERTISE_1000FULL;
4813 phy->stat1000 = 0;
4814 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4815 }
Bruce Allan7c257692008-04-23 11:09:00 -07004816}
4817
Auke Kokbc7f75f2007-09-17 12:30:59 -07004818static void e1000_print_link_info(struct e1000_adapter *adapter)
4819{
Auke Kokbc7f75f2007-09-17 12:30:59 -07004820 struct e1000_hw *hw = &adapter->hw;
4821 u32 ctrl = er32(CTRL);
4822
Bruce Allan8f12fe82008-11-21 16:54:43 -08004823 /* Link status message must follow this format for user tools */
Bruce Allan7dbc1672013-01-12 03:11:25 +00004824 pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4825 adapter->netdev->name, adapter->link_speed,
Jeff Kirsheref456f82011-11-03 11:40:28 +00004826 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4827 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4828 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4829 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
Auke Kokbc7f75f2007-09-17 12:30:59 -07004830}
4831
Bruce Allan0c6bdb32010-06-17 18:58:43 +00004832static bool e1000e_has_link(struct e1000_adapter *adapter)
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004833{
4834 struct e1000_hw *hw = &adapter->hw;
Rusty Russell3db1cd52011-12-19 13:56:45 +00004835 bool link_active = false;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004836 s32 ret_val = 0;
4837
Bruce Allane921eb12012-11-28 09:28:37 +00004838 /* get_link_status is set on LSC (link status) interrupt or
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004839 * Rx sequence error interrupt. get_link_status will stay
4840 * false until the check_for_link establishes link
4841 * for copper adapters ONLY
4842 */
4843 switch (hw->phy.media_type) {
4844 case e1000_media_type_copper:
4845 if (hw->mac.get_link_status) {
4846 ret_val = hw->mac.ops.check_for_link(hw);
4847 link_active = !hw->mac.get_link_status;
4848 } else {
Rusty Russell3db1cd52011-12-19 13:56:45 +00004849 link_active = true;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004850 }
4851 break;
4852 case e1000_media_type_fiber:
4853 ret_val = hw->mac.ops.check_for_link(hw);
4854 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4855 break;
4856 case e1000_media_type_internal_serdes:
4857 ret_val = hw->mac.ops.check_for_link(hw);
4858 link_active = adapter->hw.mac.serdes_has_link;
4859 break;
4860 default:
4861 case e1000_media_type_unknown:
4862 break;
4863 }
4864
4865 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4866 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4867 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
Jeff Kirsher44defeb2008-08-04 17:20:41 -07004868 e_info("Gigabit has been disabled, downgrading speed\n");
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004869 }
4870
4871 return link_active;
4872}
4873
4874static void e1000e_enable_receives(struct e1000_adapter *adapter)
4875{
4876 /* make sure the receive unit is started */
4877 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
Bruce Allan12d43f72012-12-05 06:26:14 +00004878 (adapter->flags & FLAG_RESTART_NOW)) {
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004879 struct e1000_hw *hw = &adapter->hw;
4880 u32 rctl = er32(RCTL);
David Ertman6cf08d12014-04-05 06:07:00 +00004881
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004882 ew32(RCTL, rctl | E1000_RCTL_EN);
Bruce Allan12d43f72012-12-05 06:26:14 +00004883 adapter->flags &= ~FLAG_RESTART_NOW;
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004884 }
4885}
4886
Carolyn Wybornyff10e132010-10-28 00:59:53 +00004887static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4888{
4889 struct e1000_hw *hw = &adapter->hw;
4890
Bruce Allane921eb12012-11-28 09:28:37 +00004891 /* With 82574 controllers, PHY needs to be checked periodically
Carolyn Wybornyff10e132010-10-28 00:59:53 +00004892 * for hung state and reset, if two calls return true
4893 */
4894 if (e1000_check_phy_82574(hw))
4895 adapter->phy_hang_count++;
4896 else
4897 adapter->phy_hang_count = 0;
4898
4899 if (adapter->phy_hang_count > 1) {
4900 adapter->phy_hang_count = 0;
David Ertmand9554e92014-01-08 01:07:55 +00004901 e_dbg("PHY appears hung - resetting\n");
Carolyn Wybornyff10e132010-10-28 00:59:53 +00004902 schedule_work(&adapter->reset_task);
4903 }
4904}
4905
Auke Kokbc7f75f2007-09-17 12:30:59 -07004906/**
4907 * e1000_watchdog - Timer Call-back
4908 * @data: pointer to adapter cast into an unsigned long
4909 **/
4910static void e1000_watchdog(unsigned long data)
4911{
Bruce Allan53aa82d2013-02-20 04:06:06 +00004912 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004913
4914 /* Do the rest outside of interrupt context */
4915 schedule_work(&adapter->watchdog_task);
4916
4917 /* TODO: make this use queue_delayed_work() */
4918}
4919
4920static void e1000_watchdog_task(struct work_struct *work)
4921{
4922 struct e1000_adapter *adapter = container_of(work,
Bruce Allan17e813e2013-02-20 04:06:01 +00004923 struct e1000_adapter,
4924 watchdog_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004925 struct net_device *netdev = adapter->netdev;
4926 struct e1000_mac_info *mac = &adapter->hw.mac;
Bruce Allan75eb0fa2008-11-21 16:53:51 -08004927 struct e1000_phy_info *phy = &adapter->hw.phy;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004928 struct e1000_ring *tx_ring = adapter->tx_ring;
4929 struct e1000_hw *hw = &adapter->hw;
4930 u32 link, tctl;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004931
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00004932 if (test_bit(__E1000_DOWN, &adapter->state))
4933 return;
4934
David S. Millerb405e8d2010-02-04 22:31:41 -08004935 link = e1000e_has_link(adapter);
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004936 if ((netif_carrier_ok(netdev)) && link) {
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004937 /* Cancel scheduled suspend requests. */
4938 pm_runtime_resume(netdev->dev.parent);
4939
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004940 e1000e_enable_receives(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004941 goto link_up;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004942 }
4943
4944 if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4945 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4946 e1000_update_mng_vlan(adapter);
4947
Auke Kokbc7f75f2007-09-17 12:30:59 -07004948 if (link) {
4949 if (!netif_carrier_ok(netdev)) {
Rusty Russell3db1cd52011-12-19 13:56:45 +00004950 bool txb2b = true;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00004951
4952 /* Cancel scheduled suspend requests. */
4953 pm_runtime_resume(netdev->dev.parent);
4954
Jeff Kirsher318a94d2008-03-28 09:15:16 -07004955 /* update snapshot of PHY registers on LSC */
Bruce Allan7c257692008-04-23 11:09:00 -07004956 e1000_phy_read_status(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004957 mac->ops.get_link_up_info(&adapter->hw,
Bruce Allan17e813e2013-02-20 04:06:01 +00004958 &adapter->link_speed,
4959 &adapter->link_duplex);
Auke Kokbc7f75f2007-09-17 12:30:59 -07004960 e1000_print_link_info(adapter);
Koki Sanagie792cd92013-02-03 14:03:55 +00004961
4962 /* check if SmartSpeed worked */
4963 e1000e_check_downshift(hw);
4964 if (phy->speed_downgraded)
4965 netdev_warn(netdev,
4966 "Link Speed was downgraded by SmartSpeed\n");
4967
Bruce Allane921eb12012-11-28 09:28:37 +00004968 /* On supported PHYs, check for duplex mismatch only
Bruce Allanf4187b52008-08-26 18:36:50 -07004969 * if link has autonegotiated at 10/100 half
4970 */
4971 if ((hw->phy.type == e1000_phy_igp_3 ||
4972 hw->phy.type == e1000_phy_bm) &&
David Ertman138953b2013-08-30 05:45:25 +00004973 hw->mac.autoneg &&
Bruce Allanf4187b52008-08-26 18:36:50 -07004974 (adapter->link_speed == SPEED_10 ||
4975 adapter->link_speed == SPEED_100) &&
4976 (adapter->link_duplex == HALF_DUPLEX)) {
4977 u16 autoneg_exp;
4978
Bruce Allanc2ade1a2013-01-16 08:54:35 +00004979 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp);
Bruce Allanf4187b52008-08-26 18:36:50 -07004980
Bruce Allanc2ade1a2013-01-16 08:54:35 +00004981 if (!(autoneg_exp & EXPANSION_NWAY))
Jeff Kirsheref456f82011-11-03 11:40:28 +00004982 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n");
Bruce Allanf4187b52008-08-26 18:36:50 -07004983 }
4984
Emil Tantilovf49c57e2010-03-24 12:55:02 +00004985 /* adjust timeout factor according to speed/duplex */
Auke Kokbc7f75f2007-09-17 12:30:59 -07004986 adapter->tx_timeout_factor = 1;
4987 switch (adapter->link_speed) {
4988 case SPEED_10:
Rusty Russell3db1cd52011-12-19 13:56:45 +00004989 txb2b = false;
Bruce Allan10f1b492008-08-08 18:36:01 -07004990 adapter->tx_timeout_factor = 16;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004991 break;
4992 case SPEED_100:
Rusty Russell3db1cd52011-12-19 13:56:45 +00004993 txb2b = false;
Bruce Allan4c86e0b2009-11-19 12:35:26 +00004994 adapter->tx_timeout_factor = 10;
Auke Kokbc7f75f2007-09-17 12:30:59 -07004995 break;
4996 }
4997
Bruce Allane921eb12012-11-28 09:28:37 +00004998 /* workaround: re-program speed mode bit after
Bruce Allanad680762008-03-28 09:15:03 -07004999 * link-up event
5000 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005001 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
5002 !txb2b) {
5003 u32 tarc0;
David Ertman6cf08d12014-04-05 06:07:00 +00005004
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07005005 tarc0 = er32(TARC(0));
Auke Kokbc7f75f2007-09-17 12:30:59 -07005006 tarc0 &= ~SPEED_MODE_BIT;
Jeff Kirshere9ec2c02008-04-02 13:48:13 -07005007 ew32(TARC(0), tarc0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005008 }
5009
Bruce Allane921eb12012-11-28 09:28:37 +00005010 /* disable TSO for pcie and 10/100 speeds, to avoid
Bruce Allanad680762008-03-28 09:15:03 -07005011 * some hardware issues
5012 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005013 if (!(adapter->flags & FLAG_TSO_FORCE)) {
5014 switch (adapter->link_speed) {
5015 case SPEED_10:
5016 case SPEED_100:
Jeff Kirsher44defeb2008-08-04 17:20:41 -07005017 e_info("10/100 speed: disabling TSO\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07005018 netdev->features &= ~NETIF_F_TSO;
5019 netdev->features &= ~NETIF_F_TSO6;
5020 break;
5021 case SPEED_1000:
5022 netdev->features |= NETIF_F_TSO;
5023 netdev->features |= NETIF_F_TSO6;
5024 break;
5025 default:
5026 /* oops */
5027 break;
5028 }
5029 }
5030
Bruce Allane921eb12012-11-28 09:28:37 +00005031 /* enable transmits in the hardware, need to do this
Bruce Allanad680762008-03-28 09:15:03 -07005032 * after setting TARC(0)
5033 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005034 tctl = er32(TCTL);
5035 tctl |= E1000_TCTL_EN;
5036 ew32(TCTL, tctl);
5037
Bruce Allane921eb12012-11-28 09:28:37 +00005038 /* Perform any post-link-up configuration before
Bruce Allan75eb0fa2008-11-21 16:53:51 -08005039 * reporting link up.
5040 */
5041 if (phy->ops.cfg_on_link_up)
5042 phy->ops.cfg_on_link_up(hw);
5043
Auke Kokbc7f75f2007-09-17 12:30:59 -07005044 netif_carrier_on(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005045
5046 if (!test_bit(__E1000_DOWN, &adapter->state))
5047 mod_timer(&adapter->phy_info_timer,
5048 round_jiffies(jiffies + 2 * HZ));
Auke Kokbc7f75f2007-09-17 12:30:59 -07005049 }
5050 } else {
5051 if (netif_carrier_ok(netdev)) {
5052 adapter->link_speed = 0;
5053 adapter->link_duplex = 0;
Bruce Allan8f12fe82008-11-21 16:54:43 -08005054 /* Link status message must follow this format */
Bruce Allan7dbc1672013-01-12 03:11:25 +00005055 pr_info("%s NIC Link is Down\n", adapter->netdev->name);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005056 netif_carrier_off(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005057 if (!test_bit(__E1000_DOWN, &adapter->state))
5058 mod_timer(&adapter->phy_info_timer,
5059 round_jiffies(jiffies + 2 * HZ));
5060
David Ertmand9554e92014-01-08 01:07:55 +00005061 /* 8000ES2LAN requires a Rx packet buffer work-around
5062 * on link down event; reset the controller to flush
5063 * the Rx packet buffer.
Bruce Allan12d43f72012-12-05 06:26:14 +00005064 */
David Ertmand9554e92014-01-08 01:07:55 +00005065 if (adapter->flags & FLAG_RX_NEEDS_RESTART)
Bruce Allan12d43f72012-12-05 06:26:14 +00005066 adapter->flags |= FLAG_RESTART_NOW;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00005067 else
5068 pm_schedule_suspend(netdev->dev.parent,
Bruce Allan17e813e2013-02-20 04:06:01 +00005069 LINK_TIMEOUT);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005070 }
5071 }
5072
5073link_up:
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005074 spin_lock(&adapter->stats64_lock);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005075 e1000e_update_stats(adapter);
5076
5077 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
5078 adapter->tpt_old = adapter->stats.tpt;
5079 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
5080 adapter->colc_old = adapter->stats.colc;
5081
Bruce Allan7c257692008-04-23 11:09:00 -07005082 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
5083 adapter->gorc_old = adapter->stats.gorc;
5084 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
5085 adapter->gotc_old = adapter->stats.gotc;
Flavio Leitner2084b112011-04-05 04:27:43 +00005086 spin_unlock(&adapter->stats64_lock);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005087
David Ertmand9554e92014-01-08 01:07:55 +00005088 /* If the link is lost the controller stops DMA, but
5089 * if there is queued Tx work it cannot be done. So
5090 * reset the controller to flush the Tx packet buffers.
5091 */
5092 if (!netif_carrier_ok(netdev) &&
5093 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count))
5094 adapter->flags |= FLAG_RESTART_NOW;
5095
5096 /* If reset is necessary, do it outside of interrupt context. */
Bruce Allan12d43f72012-12-05 06:26:14 +00005097 if (adapter->flags & FLAG_RESTART_NOW) {
Bruce Allan90da0662011-01-06 07:02:53 +00005098 schedule_work(&adapter->reset_task);
5099 /* return immediately since reset is imminent */
5100 return;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005101 }
5102
Bruce Allan12d43f72012-12-05 06:26:14 +00005103 e1000e_update_adaptive(&adapter->hw);
5104
Jesse Brandeburgeab2abf2010-05-04 22:26:03 +00005105 /* Simple mode for Interrupt Throttle Rate (ITR) */
5106 if (adapter->itr_setting == 4) {
Bruce Allane921eb12012-11-28 09:28:37 +00005107 /* Symmetric Tx/Rx gets a reduced ITR=2000;
Jesse Brandeburgeab2abf2010-05-04 22:26:03 +00005108 * Total asymmetrical Tx or Rx gets ITR=8000;
5109 * everyone else is between 2000-8000.
5110 */
5111 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
5112 u32 dif = (adapter->gotc > adapter->gorc ?
Bruce Allan17e813e2013-02-20 04:06:01 +00005113 adapter->gotc - adapter->gorc :
5114 adapter->gorc - adapter->gotc) / 10000;
Jesse Brandeburgeab2abf2010-05-04 22:26:03 +00005115 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
5116
Matthew Vick22a4cca2012-07-12 00:02:42 +00005117 e1000e_write_itr(adapter, itr);
Jesse Brandeburgeab2abf2010-05-04 22:26:03 +00005118 }
5119
Bruce Allanad680762008-03-28 09:15:03 -07005120 /* Cause software interrupt to ensure Rx ring is cleaned */
Bruce Allan4662e822008-08-26 18:37:06 -07005121 if (adapter->msix_entries)
5122 ew32(ICS, adapter->rx_ring->ims_val);
5123 else
5124 ew32(ICS, E1000_ICS_RXDMT0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005125
Jesse Brandeburg713b3c92011-02-02 10:19:50 +00005126 /* flush pending descriptors to memory before detecting Tx hang */
5127 e1000e_flush_descriptors(adapter);
5128
Auke Kokbc7f75f2007-09-17 12:30:59 -07005129 /* Force detection of hung controller every watchdog period */
Rusty Russell3db1cd52011-12-19 13:56:45 +00005130 adapter->detect_tx_hung = true;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005131
Bruce Allane921eb12012-11-28 09:28:37 +00005132 /* With 82571 controllers, LAA may be overwritten due to controller
Bruce Allanad680762008-03-28 09:15:03 -07005133 * reset from the other port. Set the appropriate LAA in RAR[0]
5134 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005135 if (e1000e_get_laa_state_82571(hw))
Bruce Allan69e1e012012-04-14 03:28:50 +00005136 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005137
Carolyn Wybornyff10e132010-10-28 00:59:53 +00005138 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
5139 e1000e_check_82574_phy_workaround(adapter);
5140
Bruce Allanb67e1912012-12-27 08:32:33 +00005141 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */
5142 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) {
5143 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) &&
5144 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) {
5145 er32(RXSTMPH);
5146 adapter->rx_hwtstamp_cleared++;
5147 } else {
5148 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP;
5149 }
5150 }
5151
Auke Kokbc7f75f2007-09-17 12:30:59 -07005152 /* Reset the timer */
5153 if (!test_bit(__E1000_DOWN, &adapter->state))
5154 mod_timer(&adapter->watchdog_timer,
5155 round_jiffies(jiffies + 2 * HZ));
5156}
5157
5158#define E1000_TX_FLAGS_CSUM 0x00000001
5159#define E1000_TX_FLAGS_VLAN 0x00000002
5160#define E1000_TX_FLAGS_TSO 0x00000004
5161#define E1000_TX_FLAGS_IPV4 0x00000008
Ben Greear943146d2012-02-11 15:39:40 +00005162#define E1000_TX_FLAGS_NO_FCS 0x00000010
Bruce Allanb67e1912012-12-27 08:32:33 +00005163#define E1000_TX_FLAGS_HWTSTAMP 0x00000020
Auke Kokbc7f75f2007-09-17 12:30:59 -07005164#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
5165#define E1000_TX_FLAGS_VLAN_SHIFT 16
5166
Bruce Allan55aa6982011-12-16 00:45:45 +00005167static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005168{
Auke Kokbc7f75f2007-09-17 12:30:59 -07005169 struct e1000_context_desc *context_desc;
5170 struct e1000_buffer *buffer_info;
5171 unsigned int i;
5172 u32 cmd_length = 0;
Bruce Allan70443ae2012-08-17 06:18:13 +00005173 u16 ipcse = 0, mss;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005174 u8 ipcss, ipcso, tucss, tucso, hdr_len;
Francois Romieubcf1f572014-03-30 03:14:43 +00005175 int err;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005176
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005177 if (!skb_is_gso(skb))
5178 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005179
Francois Romieubcf1f572014-03-30 03:14:43 +00005180 err = skb_cow_head(skb, 0);
5181 if (err < 0)
5182 return err;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005183
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005184 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5185 mss = skb_shinfo(skb)->gso_size;
5186 if (skb->protocol == htons(ETH_P_IP)) {
5187 struct iphdr *iph = ip_hdr(skb);
5188 iph->tot_len = 0;
5189 iph->check = 0;
5190 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
Bruce Allanf0ff4392013-02-20 04:05:39 +00005191 0, IPPROTO_TCP, 0);
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005192 cmd_length = E1000_TXD_CMD_IP;
5193 ipcse = skb_transport_offset(skb) - 1;
Sridhar Samudrala8e1e8a42010-01-23 02:02:21 -08005194 } else if (skb_is_gso_v6(skb)) {
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005195 ipv6_hdr(skb)->payload_len = 0;
5196 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
Bruce Allanf0ff4392013-02-20 04:05:39 +00005197 &ipv6_hdr(skb)->daddr,
5198 0, IPPROTO_TCP, 0);
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005199 ipcse = 0;
5200 }
5201 ipcss = skb_network_offset(skb);
5202 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
5203 tucss = skb_transport_offset(skb);
5204 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005205
5206 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
Bruce Allanf0ff4392013-02-20 04:05:39 +00005207 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005208
5209 i = tx_ring->next_to_use;
5210 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5211 buffer_info = &tx_ring->buffer_info[i];
5212
Bruce Allane80bd1d2013-05-01 01:19:46 +00005213 context_desc->lower_setup.ip_fields.ipcss = ipcss;
5214 context_desc->lower_setup.ip_fields.ipcso = ipcso;
5215 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005216 context_desc->upper_setup.tcp_fields.tucss = tucss;
5217 context_desc->upper_setup.tcp_fields.tucso = tucso;
Bruce Allan70443ae2012-08-17 06:18:13 +00005218 context_desc->upper_setup.tcp_fields.tucse = 0;
Bruce Allane80bd1d2013-05-01 01:19:46 +00005219 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
Bruce Allan3d5e33c2009-11-20 23:27:03 +00005220 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
5221 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
5222
5223 buffer_info->time_stamp = jiffies;
5224 buffer_info->next_to_watch = i;
5225
5226 i++;
5227 if (i == tx_ring->count)
5228 i = 0;
5229 tx_ring->next_to_use = i;
5230
5231 return 1;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005232}
5233
Bruce Allan55aa6982011-12-16 00:45:45 +00005234static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005235{
Bruce Allan55aa6982011-12-16 00:45:45 +00005236 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005237 struct e1000_context_desc *context_desc;
5238 struct e1000_buffer *buffer_info;
5239 unsigned int i;
5240 u8 css;
Dave Grahamaf807c82008-10-09 14:28:58 -07005241 u32 cmd_len = E1000_TXD_CMD_DEXT;
Arthur Jones5f66f202009-03-19 01:13:08 +00005242 __be16 protocol;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005243
Dave Grahamaf807c82008-10-09 14:28:58 -07005244 if (skb->ip_summed != CHECKSUM_PARTIAL)
David Ertman3992c8e2014-04-05 03:36:15 +00005245 return false;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005246
Arthur Jones5f66f202009-03-19 01:13:08 +00005247 if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
5248 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
5249 else
5250 protocol = skb->protocol;
5251
Arthur Jones3f518392009-03-20 15:56:35 -07005252 switch (protocol) {
Harvey Harrison09640e62009-02-01 00:45:17 -08005253 case cpu_to_be16(ETH_P_IP):
Dave Grahamaf807c82008-10-09 14:28:58 -07005254 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5255 cmd_len |= E1000_TXD_CMD_TCP;
5256 break;
Harvey Harrison09640e62009-02-01 00:45:17 -08005257 case cpu_to_be16(ETH_P_IPV6):
Dave Grahamaf807c82008-10-09 14:28:58 -07005258 /* XXX not handling all IPV6 headers */
5259 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5260 cmd_len |= E1000_TXD_CMD_TCP;
5261 break;
5262 default:
5263 if (unlikely(net_ratelimit()))
Arthur Jones5f66f202009-03-19 01:13:08 +00005264 e_warn("checksum_partial proto=%x!\n",
5265 be16_to_cpu(protocol));
Dave Grahamaf807c82008-10-09 14:28:58 -07005266 break;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005267 }
5268
Michał Mirosław0d0b1672010-12-14 15:24:08 +00005269 css = skb_checksum_start_offset(skb);
Dave Grahamaf807c82008-10-09 14:28:58 -07005270
5271 i = tx_ring->next_to_use;
5272 buffer_info = &tx_ring->buffer_info[i];
5273 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5274
5275 context_desc->lower_setup.ip_config = 0;
5276 context_desc->upper_setup.tcp_fields.tucss = css;
Bruce Allanf0ff4392013-02-20 04:05:39 +00005277 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset;
Dave Grahamaf807c82008-10-09 14:28:58 -07005278 context_desc->upper_setup.tcp_fields.tucse = 0;
5279 context_desc->tcp_seg_setup.data = 0;
5280 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
5281
5282 buffer_info->time_stamp = jiffies;
5283 buffer_info->next_to_watch = i;
5284
5285 i++;
5286 if (i == tx_ring->count)
5287 i = 0;
5288 tx_ring->next_to_use = i;
5289
David Ertman3992c8e2014-04-05 03:36:15 +00005290 return true;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005291}
5292
Bruce Allan55aa6982011-12-16 00:45:45 +00005293static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
5294 unsigned int first, unsigned int max_per_txd,
Bruce Alland821a4c2012-08-24 20:38:11 +00005295 unsigned int nr_frags)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005296{
Bruce Allan55aa6982011-12-16 00:45:45 +00005297 struct e1000_adapter *adapter = tx_ring->adapter;
Alexander Duyck03b13202009-12-02 16:45:31 +00005298 struct pci_dev *pdev = adapter->pdev;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005299 struct e1000_buffer *buffer_info;
Jesse Brandeburg8ddc9512009-03-02 16:02:53 -08005300 unsigned int len = skb_headlen(skb);
Alexander Duyck03b13202009-12-02 16:45:31 +00005301 unsigned int offset = 0, size, count = 0, i;
Tom Herbert9ed318d2010-05-05 14:02:27 +00005302 unsigned int f, bytecount, segs;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005303
5304 i = tx_ring->next_to_use;
5305
5306 while (len) {
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005307 buffer_info = &tx_ring->buffer_info[i];
Auke Kokbc7f75f2007-09-17 12:30:59 -07005308 size = min(len, max_per_txd);
5309
Auke Kokbc7f75f2007-09-17 12:30:59 -07005310 buffer_info->length = size;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005311 buffer_info->time_stamp = jiffies;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005312 buffer_info->next_to_watch = i;
Nick Nunley0be3f552010-04-27 13:09:05 +00005313 buffer_info->dma = dma_map_single(&pdev->dev,
5314 skb->data + offset,
Bruce Allanaf667a22010-12-31 06:10:01 +00005315 size, DMA_TO_DEVICE);
Alexander Duyck03b13202009-12-02 16:45:31 +00005316 buffer_info->mapped_as_page = false;
Nick Nunley0be3f552010-04-27 13:09:05 +00005317 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
Alexander Duyck03b13202009-12-02 16:45:31 +00005318 goto dma_error;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005319
5320 len -= size;
5321 offset += size;
Alexander Duyck03b13202009-12-02 16:45:31 +00005322 count++;
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005323
5324 if (len) {
5325 i++;
5326 if (i == tx_ring->count)
5327 i = 0;
5328 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07005329 }
5330
5331 for (f = 0; f < nr_frags; f++) {
Eric Dumazet9e903e02011-10-18 21:00:24 +00005332 const struct skb_frag_struct *frag;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005333
5334 frag = &skb_shinfo(skb)->frags[f];
Eric Dumazet9e903e02011-10-18 21:00:24 +00005335 len = skb_frag_size(frag);
Ian Campbell877749b2011-08-29 23:18:26 +00005336 offset = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005337
5338 while (len) {
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005339 i++;
5340 if (i == tx_ring->count)
5341 i = 0;
5342
Auke Kokbc7f75f2007-09-17 12:30:59 -07005343 buffer_info = &tx_ring->buffer_info[i];
5344 size = min(len, max_per_txd);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005345
5346 buffer_info->length = size;
5347 buffer_info->time_stamp = jiffies;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005348 buffer_info->next_to_watch = i;
Ian Campbell877749b2011-08-29 23:18:26 +00005349 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
Bruce Allan17e813e2013-02-20 04:06:01 +00005350 offset, size,
5351 DMA_TO_DEVICE);
Alexander Duyck03b13202009-12-02 16:45:31 +00005352 buffer_info->mapped_as_page = true;
Nick Nunley0be3f552010-04-27 13:09:05 +00005353 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
Alexander Duyck03b13202009-12-02 16:45:31 +00005354 goto dma_error;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005355
5356 len -= size;
5357 offset += size;
5358 count++;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005359 }
5360 }
5361
Bruce Allanaf667a22010-12-31 06:10:01 +00005362 segs = skb_shinfo(skb)->gso_segs ? : 1;
Tom Herbert9ed318d2010-05-05 14:02:27 +00005363 /* multiply data chunks by size of headers */
5364 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
5365
Auke Kokbc7f75f2007-09-17 12:30:59 -07005366 tx_ring->buffer_info[i].skb = skb;
Tom Herbert9ed318d2010-05-05 14:02:27 +00005367 tx_ring->buffer_info[i].segs = segs;
5368 tx_ring->buffer_info[i].bytecount = bytecount;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005369 tx_ring->buffer_info[first].next_to_watch = i;
5370
5371 return count;
Alexander Duyck03b13202009-12-02 16:45:31 +00005372
5373dma_error:
Bruce Allanaf667a22010-12-31 06:10:01 +00005374 dev_err(&pdev->dev, "Tx DMA map failed\n");
Alexander Duyck03b13202009-12-02 16:45:31 +00005375 buffer_info->dma = 0;
Roel Kluinc1fa3472010-01-19 14:21:45 +00005376 if (count)
Alexander Duyck03b13202009-12-02 16:45:31 +00005377 count--;
Roel Kluinc1fa3472010-01-19 14:21:45 +00005378
5379 while (count--) {
Bruce Allanaf667a22010-12-31 06:10:01 +00005380 if (i == 0)
Alexander Duyck03b13202009-12-02 16:45:31 +00005381 i += tx_ring->count;
Roel Kluinc1fa3472010-01-19 14:21:45 +00005382 i--;
Alexander Duyck03b13202009-12-02 16:45:31 +00005383 buffer_info = &tx_ring->buffer_info[i];
Bruce Allan55aa6982011-12-16 00:45:45 +00005384 e1000_put_txbuf(tx_ring, buffer_info);
Alexander Duyck03b13202009-12-02 16:45:31 +00005385 }
5386
5387 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005388}
5389
Bruce Allan55aa6982011-12-16 00:45:45 +00005390static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005391{
Bruce Allan55aa6982011-12-16 00:45:45 +00005392 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005393 struct e1000_tx_desc *tx_desc = NULL;
5394 struct e1000_buffer *buffer_info;
5395 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
5396 unsigned int i;
5397
5398 if (tx_flags & E1000_TX_FLAGS_TSO) {
5399 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
Bruce Allanf0ff4392013-02-20 04:05:39 +00005400 E1000_TXD_CMD_TSE;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005401 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5402
5403 if (tx_flags & E1000_TX_FLAGS_IPV4)
5404 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
5405 }
5406
5407 if (tx_flags & E1000_TX_FLAGS_CSUM) {
5408 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5409 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5410 }
5411
5412 if (tx_flags & E1000_TX_FLAGS_VLAN) {
5413 txd_lower |= E1000_TXD_CMD_VLE;
5414 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
5415 }
5416
Ben Greear943146d2012-02-11 15:39:40 +00005417 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5418 txd_lower &= ~(E1000_TXD_CMD_IFCS);
5419
Bruce Allanb67e1912012-12-27 08:32:33 +00005420 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) {
5421 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5422 txd_upper |= E1000_TXD_EXTCMD_TSTAMP;
5423 }
5424
Auke Kokbc7f75f2007-09-17 12:30:59 -07005425 i = tx_ring->next_to_use;
5426
Bruce Allan36b973d2010-11-24 07:42:43 +00005427 do {
Auke Kokbc7f75f2007-09-17 12:30:59 -07005428 buffer_info = &tx_ring->buffer_info[i];
5429 tx_desc = E1000_TX_DESC(*tx_ring, i);
5430 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
Bruce Allanf0ff4392013-02-20 04:05:39 +00005431 tx_desc->lower.data = cpu_to_le32(txd_lower |
5432 buffer_info->length);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005433 tx_desc->upper.data = cpu_to_le32(txd_upper);
5434
5435 i++;
5436 if (i == tx_ring->count)
5437 i = 0;
Bruce Allan36b973d2010-11-24 07:42:43 +00005438 } while (--count > 0);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005439
5440 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
5441
Ben Greear943146d2012-02-11 15:39:40 +00005442 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
5443 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5444 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
5445
Bruce Allane921eb12012-11-28 09:28:37 +00005446 /* Force memory writes to complete before letting h/w
Auke Kokbc7f75f2007-09-17 12:30:59 -07005447 * know there are new descriptors to fetch. (Only
5448 * applicable for weak-ordered memory model archs,
Bruce Allanad680762008-03-28 09:15:03 -07005449 * such as IA-64).
5450 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005451 wmb();
5452
5453 tx_ring->next_to_use = i;
David S. Miller823dcd22011-08-20 10:39:12 -07005454
5455 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
Bruce Allan55aa6982011-12-16 00:45:45 +00005456 e1000e_update_tdt_wa(tx_ring, i);
David S. Miller823dcd22011-08-20 10:39:12 -07005457 else
Bruce Allanc5083cf2011-12-16 00:45:40 +00005458 writel(i, tx_ring->tail);
David S. Miller823dcd22011-08-20 10:39:12 -07005459
Bruce Allane921eb12012-11-28 09:28:37 +00005460 /* we need this if more than one processor can write to our tail
Bruce Allanad680762008-03-28 09:15:03 -07005461 * at a time, it synchronizes IO on IA64/Altix systems
5462 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005463 mmiowb();
5464}
5465
5466#define MINIMUM_DHCP_PACKET_SIZE 282
5467static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
5468 struct sk_buff *skb)
5469{
Bruce Allane80bd1d2013-05-01 01:19:46 +00005470 struct e1000_hw *hw = &adapter->hw;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005471 u16 length, offset;
5472
Bruce Alland60923c2012-12-05 06:26:56 +00005473 if (vlan_tx_tag_present(skb) &&
5474 !((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
5475 (adapter->hw.mng_cookie.status &
5476 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
5477 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005478
5479 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
5480 return 0;
5481
Bruce Allan53aa82d2013-02-20 04:06:06 +00005482 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP))
Auke Kokbc7f75f2007-09-17 12:30:59 -07005483 return 0;
5484
5485 {
Bruce Allan362e20c2013-02-20 04:05:45 +00005486 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005487 struct udphdr *udp;
5488
5489 if (ip->protocol != IPPROTO_UDP)
5490 return 0;
5491
5492 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
5493 if (ntohs(udp->dest) != 67)
5494 return 0;
5495
5496 offset = (u8 *)udp + 8 - skb->data;
5497 length = skb->len - offset;
5498 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
5499 }
5500
5501 return 0;
5502}
5503
Bruce Allan55aa6982011-12-16 00:45:45 +00005504static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005505{
Bruce Allan55aa6982011-12-16 00:45:45 +00005506 struct e1000_adapter *adapter = tx_ring->adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005507
Bruce Allan55aa6982011-12-16 00:45:45 +00005508 netif_stop_queue(adapter->netdev);
Bruce Allane921eb12012-11-28 09:28:37 +00005509 /* Herbert's original patch had:
Auke Kokbc7f75f2007-09-17 12:30:59 -07005510 * smp_mb__after_netif_stop_queue();
Bruce Allanad680762008-03-28 09:15:03 -07005511 * but since that doesn't exist yet, just open code it.
5512 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005513 smp_mb();
5514
Bruce Allane921eb12012-11-28 09:28:37 +00005515 /* We need to check again in a case another CPU has just
Bruce Allanad680762008-03-28 09:15:03 -07005516 * made room available.
5517 */
Bruce Allan55aa6982011-12-16 00:45:45 +00005518 if (e1000_desc_unused(tx_ring) < size)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005519 return -EBUSY;
5520
5521 /* A reprieve! */
Bruce Allan55aa6982011-12-16 00:45:45 +00005522 netif_start_queue(adapter->netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005523 ++adapter->restart_queue;
5524 return 0;
5525}
5526
Bruce Allan55aa6982011-12-16 00:45:45 +00005527static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005528{
Bruce Alland821a4c2012-08-24 20:38:11 +00005529 BUG_ON(size > tx_ring->count);
5530
Bruce Allan55aa6982011-12-16 00:45:45 +00005531 if (e1000_desc_unused(tx_ring) >= size)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005532 return 0;
Bruce Allan55aa6982011-12-16 00:45:45 +00005533 return __e1000_maybe_stop_tx(tx_ring, size);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005534}
5535
Stephen Hemminger3b29a562009-08-31 19:50:55 +00005536static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5537 struct net_device *netdev)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005538{
5539 struct e1000_adapter *adapter = netdev_priv(netdev);
5540 struct e1000_ring *tx_ring = adapter->tx_ring;
5541 unsigned int first;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005542 unsigned int tx_flags = 0;
Eric Dumazete743d312010-04-14 15:59:40 -07005543 unsigned int len = skb_headlen(skb);
Auke Kok4e6c7092007-10-05 14:15:23 -07005544 unsigned int nr_frags;
5545 unsigned int mss;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005546 int count = 0;
5547 int tso;
5548 unsigned int f;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005549
5550 if (test_bit(__E1000_DOWN, &adapter->state)) {
5551 dev_kfree_skb_any(skb);
5552 return NETDEV_TX_OK;
5553 }
5554
5555 if (skb->len <= 0) {
5556 dev_kfree_skb_any(skb);
5557 return NETDEV_TX_OK;
5558 }
5559
Bruce Allane921eb12012-11-28 09:28:37 +00005560 /* The minimum packet size with TCTL.PSP set is 17 bytes so
Tushar Dave6e97c172012-09-14 02:21:37 +00005561 * pad skb in order to meet this minimum size requirement
5562 */
5563 if (unlikely(skb->len < 17)) {
5564 if (skb_pad(skb, 17 - skb->len))
5565 return NETDEV_TX_OK;
5566 skb->len = 17;
5567 skb_set_tail_pointer(skb, 17);
5568 }
5569
Auke Kokbc7f75f2007-09-17 12:30:59 -07005570 mss = skb_shinfo(skb)->gso_size;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005571 if (mss) {
5572 u8 hdr_len;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005573
Bruce Allane921eb12012-11-28 09:28:37 +00005574 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
Bruce Allanad680762008-03-28 09:15:03 -07005575 * points to just header, pull a few bytes of payload from
5576 * frags into skb->data
5577 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005578 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
Bruce Allane921eb12012-11-28 09:28:37 +00005579 /* we do this workaround for ES2LAN, but it is un-necessary,
Bruce Allanad680762008-03-28 09:15:03 -07005580 * avoiding it could save a lot of cycles
5581 */
Auke Kok4e6c7092007-10-05 14:15:23 -07005582 if (skb->data_len && (hdr_len == len)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07005583 unsigned int pull_size;
5584
Bruce Allana2a5b322012-01-31 06:37:17 +00005585 pull_size = min_t(unsigned int, 4, skb->data_len);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005586 if (!__pskb_pull_tail(skb, pull_size)) {
Jeff Kirsher44defeb2008-08-04 17:20:41 -07005587 e_err("__pskb_pull_tail failed.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07005588 dev_kfree_skb_any(skb);
5589 return NETDEV_TX_OK;
5590 }
Eric Dumazete743d312010-04-14 15:59:40 -07005591 len = skb_headlen(skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005592 }
5593 }
5594
5595 /* reserve a descriptor for the offload context */
5596 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5597 count++;
5598 count++;
5599
Bruce Alland821a4c2012-08-24 20:38:11 +00005600 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005601
5602 nr_frags = skb_shinfo(skb)->nr_frags;
5603 for (f = 0; f < nr_frags; f++)
Bruce Alland821a4c2012-08-24 20:38:11 +00005604 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5605 adapter->tx_fifo_limit);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005606
5607 if (adapter->hw.mac.tx_pkt_filtering)
5608 e1000_transfer_dhcp_info(adapter, skb);
5609
Bruce Allane921eb12012-11-28 09:28:37 +00005610 /* need: count + 2 desc gap to keep tail from touching
Bruce Allanad680762008-03-28 09:15:03 -07005611 * head, otherwise try next time
5612 */
Bruce Allan55aa6982011-12-16 00:45:45 +00005613 if (e1000_maybe_stop_tx(tx_ring, count + 2))
Auke Kokbc7f75f2007-09-17 12:30:59 -07005614 return NETDEV_TX_BUSY;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005615
Jesse Grosseab6d182010-10-20 13:56:03 +00005616 if (vlan_tx_tag_present(skb)) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07005617 tx_flags |= E1000_TX_FLAGS_VLAN;
5618 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5619 }
5620
5621 first = tx_ring->next_to_use;
5622
Bruce Allan55aa6982011-12-16 00:45:45 +00005623 tso = e1000_tso(tx_ring, skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005624 if (tso < 0) {
5625 dev_kfree_skb_any(skb);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005626 return NETDEV_TX_OK;
5627 }
5628
5629 if (tso)
5630 tx_flags |= E1000_TX_FLAGS_TSO;
Bruce Allan55aa6982011-12-16 00:45:45 +00005631 else if (e1000_tx_csum(tx_ring, skb))
Auke Kokbc7f75f2007-09-17 12:30:59 -07005632 tx_flags |= E1000_TX_FLAGS_CSUM;
5633
Bruce Allane921eb12012-11-28 09:28:37 +00005634 /* Old method was to assume IPv4 packet by default if TSO was enabled.
Auke Kokbc7f75f2007-09-17 12:30:59 -07005635 * 82571 hardware supports TSO capabilities for IPv6 as well...
Bruce Allanad680762008-03-28 09:15:03 -07005636 * no longer assume, we must.
5637 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005638 if (skb->protocol == htons(ETH_P_IP))
5639 tx_flags |= E1000_TX_FLAGS_IPV4;
5640
Ben Greear943146d2012-02-11 15:39:40 +00005641 if (unlikely(skb->no_fcs))
5642 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5643
Lucas De Marchi25985ed2011-03-30 22:57:33 -03005644 /* if count is 0 then mapping error has occurred */
Bruce Alland821a4c2012-08-24 20:38:11 +00005645 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
5646 nr_frags);
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005647 if (count) {
Bruce Allanb67e1912012-12-27 08:32:33 +00005648 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
5649 !adapter->tx_hwtstamp_skb)) {
5650 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
5651 tx_flags |= E1000_TX_FLAGS_HWTSTAMP;
5652 adapter->tx_hwtstamp_skb = skb_get(skb);
Jakub Kicinski59c871c2014-03-15 14:55:00 +00005653 adapter->tx_hwtstamp_start = jiffies;
Bruce Allanb67e1912012-12-27 08:32:33 +00005654 schedule_work(&adapter->tx_hwtstamp_work);
5655 } else {
5656 skb_tx_timestamp(skb);
5657 }
Willem de Bruijn80be3122012-04-27 09:04:05 +00005658
Tom Herbert3f0cfa32011-11-28 16:33:16 +00005659 netdev_sent_queue(netdev, skb->len);
Bruce Allan55aa6982011-12-16 00:45:45 +00005660 e1000_tx_queue(tx_ring, tx_flags, count);
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005661 /* Make sure there is space in the ring for the next send. */
Bruce Alland821a4c2012-08-24 20:38:11 +00005662 e1000_maybe_stop_tx(tx_ring,
5663 (MAX_SKB_FRAGS *
5664 DIV_ROUND_UP(PAGE_SIZE,
5665 adapter->tx_fifo_limit) + 2));
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005666 } else {
Auke Kokbc7f75f2007-09-17 12:30:59 -07005667 dev_kfree_skb_any(skb);
Alexander Duyck1b7719c2009-03-19 01:12:50 +00005668 tx_ring->buffer_info[first].time_stamp = 0;
5669 tx_ring->next_to_use = first;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005670 }
5671
Auke Kokbc7f75f2007-09-17 12:30:59 -07005672 return NETDEV_TX_OK;
5673}
5674
5675/**
5676 * e1000_tx_timeout - Respond to a Tx Hang
5677 * @netdev: network interface device structure
5678 **/
5679static void e1000_tx_timeout(struct net_device *netdev)
5680{
5681 struct e1000_adapter *adapter = netdev_priv(netdev);
5682
5683 /* Do the reset outside of interrupt context */
5684 adapter->tx_timeout_count++;
5685 schedule_work(&adapter->reset_task);
5686}
5687
5688static void e1000_reset_task(struct work_struct *work)
5689{
5690 struct e1000_adapter *adapter;
5691 adapter = container_of(work, struct e1000_adapter, reset_task);
5692
Jesse Brandeburg615b32a2011-02-02 10:19:45 +00005693 /* don't run the task if already down */
5694 if (test_bit(__E1000_DOWN, &adapter->state))
5695 return;
5696
Bruce Allan12d43f72012-12-05 06:26:14 +00005697 if (!(adapter->flags & FLAG_RESTART_NOW)) {
Carolyn Wybornyaffa9df2010-10-28 00:59:55 +00005698 e1000e_dump(adapter);
Bruce Allan12d43f72012-12-05 06:26:14 +00005699 e_err("Reset adapter unexpectedly\n");
Carolyn Wybornyaffa9df2010-10-28 00:59:55 +00005700 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07005701 e1000e_reinit_locked(adapter);
5702}
5703
5704/**
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005705 * e1000_get_stats64 - Get System Network Statistics
Auke Kokbc7f75f2007-09-17 12:30:59 -07005706 * @netdev: network interface device structure
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005707 * @stats: rtnl_link_stats64 pointer
Auke Kokbc7f75f2007-09-17 12:30:59 -07005708 *
5709 * Returns the address of the device statistics structure.
Auke Kokbc7f75f2007-09-17 12:30:59 -07005710 **/
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005711struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
Bruce Allan66501f52013-02-20 04:05:55 +00005712 struct rtnl_link_stats64 *stats)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005713{
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005714 struct e1000_adapter *adapter = netdev_priv(netdev);
5715
5716 memset(stats, 0, sizeof(struct rtnl_link_stats64));
5717 spin_lock(&adapter->stats64_lock);
5718 e1000e_update_stats(adapter);
5719 /* Fill out the OS statistics structure */
5720 stats->rx_bytes = adapter->stats.gorc;
5721 stats->rx_packets = adapter->stats.gprc;
5722 stats->tx_bytes = adapter->stats.gotc;
5723 stats->tx_packets = adapter->stats.gptc;
5724 stats->multicast = adapter->stats.mprc;
5725 stats->collisions = adapter->stats.colc;
5726
5727 /* Rx Errors */
5728
Bruce Allane921eb12012-11-28 09:28:37 +00005729 /* RLEC on some newer hardware can be incorrect so build
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005730 * our own version based on RUC and ROC
5731 */
5732 stats->rx_errors = adapter->stats.rxerrc +
Bruce Allanf0ff4392013-02-20 04:05:39 +00005733 adapter->stats.crcerrs + adapter->stats.algnerrc +
5734 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
5735 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc;
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005736 stats->rx_crc_errors = adapter->stats.crcerrs;
5737 stats->rx_frame_errors = adapter->stats.algnerrc;
5738 stats->rx_missed_errors = adapter->stats.mpc;
5739
5740 /* Tx Errors */
Bruce Allanf0ff4392013-02-20 04:05:39 +00005741 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol;
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00005742 stats->tx_aborted_errors = adapter->stats.ecol;
5743 stats->tx_window_errors = adapter->stats.latecol;
5744 stats->tx_carrier_errors = adapter->stats.tncrs;
5745
5746 /* Tx Dropped needs to be maintained elsewhere */
5747
5748 spin_unlock(&adapter->stats64_lock);
5749 return stats;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005750}
5751
5752/**
5753 * e1000_change_mtu - Change the Maximum Transfer Unit
5754 * @netdev: network interface device structure
5755 * @new_mtu: new value for maximum frame size
5756 *
5757 * Returns 0 on success, negative on failure
5758 **/
5759static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5760{
5761 struct e1000_adapter *adapter = netdev_priv(netdev);
Vlad Yasevichc751a3d2014-04-05 06:25:26 +00005762 int max_frame = new_mtu + VLAN_HLEN + ETH_HLEN + ETH_FCS_LEN;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005763
Bruce Allan2adc55c2009-06-02 11:28:58 +00005764 /* Jumbo frame support */
Bruce Allan2e1706f2012-06-30 20:02:42 +00005765 if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5766 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5767 e_err("Jumbo Frames not supported.\n");
5768 return -EINVAL;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005769 }
5770
Bruce Allan2adc55c2009-06-02 11:28:58 +00005771 /* Supported frame sizes */
5772 if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5773 (max_frame > adapter->max_hw_frame_size)) {
5774 e_err("Unsupported MTU setting\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07005775 return -EINVAL;
5776 }
5777
Bruce Allan2fbe4522012-04-19 03:21:47 +00005778 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5779 if ((adapter->hw.mac.type >= e1000_pch2lan) &&
Bruce Allana1ce6472010-09-22 17:16:40 +00005780 !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5781 (new_mtu > ETH_DATA_LEN)) {
Bruce Allan2fbe4522012-04-19 03:21:47 +00005782 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
Bruce Allana1ce6472010-09-22 17:16:40 +00005783 return -EINVAL;
5784 }
5785
Auke Kokbc7f75f2007-09-17 12:30:59 -07005786 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
Bruce Allan1bba4382011-03-19 00:27:20 +00005787 usleep_range(1000, 2000);
Bruce Allan610c9922009-11-19 12:35:45 +00005788 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07005789 adapter->max_frame_size = max_frame;
Bruce Allan610c9922009-11-19 12:35:45 +00005790 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5791 netdev->mtu = new_mtu;
David Ertman63eb48f2014-02-14 07:16:46 +00005792
5793 pm_runtime_get_sync(netdev->dev.parent);
5794
Auke Kokbc7f75f2007-09-17 12:30:59 -07005795 if (netif_running(netdev))
David Ertman28002092014-02-14 07:16:41 +00005796 e1000e_down(adapter, true);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005797
Bruce Allane921eb12012-11-28 09:28:37 +00005798 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
Auke Kokbc7f75f2007-09-17 12:30:59 -07005799 * means we reserve 2 more, this pushes us to allocate from the next
5800 * larger slab size.
Bruce Allanad680762008-03-28 09:15:03 -07005801 * i.e. RXBUFFER_2048 --> size-4096 slab
Bruce Allan97ac8ca2008-04-29 09:16:05 -07005802 * However with the new *_jumbo_rx* routines, jumbo receives will use
5803 * fragmented skbs
Bruce Allanad680762008-03-28 09:15:03 -07005804 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07005805
Jesse Brandeburg99261462010-01-22 22:56:16 +00005806 if (max_frame <= 2048)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005807 adapter->rx_buffer_len = 2048;
5808 else
5809 adapter->rx_buffer_len = 4096;
5810
5811 /* adjust allocation if LPE protects us, and we aren't using SBP */
5812 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
Bruce Allan17e813e2013-02-20 04:06:01 +00005813 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
Auke Kokbc7f75f2007-09-17 12:30:59 -07005814 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
Bruce Allan17e813e2013-02-20 04:06:01 +00005815 + ETH_FCS_LEN;
Auke Kokbc7f75f2007-09-17 12:30:59 -07005816
Auke Kokbc7f75f2007-09-17 12:30:59 -07005817 if (netif_running(netdev))
5818 e1000e_up(adapter);
5819 else
5820 e1000e_reset(adapter);
5821
David Ertman63eb48f2014-02-14 07:16:46 +00005822 pm_runtime_put_sync(netdev->dev.parent);
5823
Auke Kokbc7f75f2007-09-17 12:30:59 -07005824 clear_bit(__E1000_RESETTING, &adapter->state);
5825
5826 return 0;
5827}
5828
5829static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5830 int cmd)
5831{
5832 struct e1000_adapter *adapter = netdev_priv(netdev);
5833 struct mii_ioctl_data *data = if_mii(ifr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005834
Jeff Kirsher318a94d2008-03-28 09:15:16 -07005835 if (adapter->hw.phy.media_type != e1000_media_type_copper)
Auke Kokbc7f75f2007-09-17 12:30:59 -07005836 return -EOPNOTSUPP;
5837
5838 switch (cmd) {
5839 case SIOCGMIIPHY:
5840 data->phy_id = adapter->hw.phy.addr;
5841 break;
5842 case SIOCGMIIREG:
Bruce Allanb16a0022009-11-20 23:24:30 +00005843 e1000_phy_read_status(adapter);
5844
Bruce Allan7c257692008-04-23 11:09:00 -07005845 switch (data->reg_num & 0x1F) {
5846 case MII_BMCR:
5847 data->val_out = adapter->phy_regs.bmcr;
5848 break;
5849 case MII_BMSR:
5850 data->val_out = adapter->phy_regs.bmsr;
5851 break;
5852 case MII_PHYSID1:
5853 data->val_out = (adapter->hw.phy.id >> 16);
5854 break;
5855 case MII_PHYSID2:
5856 data->val_out = (adapter->hw.phy.id & 0xFFFF);
5857 break;
5858 case MII_ADVERTISE:
5859 data->val_out = adapter->phy_regs.advertise;
5860 break;
5861 case MII_LPA:
5862 data->val_out = adapter->phy_regs.lpa;
5863 break;
5864 case MII_EXPANSION:
5865 data->val_out = adapter->phy_regs.expansion;
5866 break;
5867 case MII_CTRL1000:
5868 data->val_out = adapter->phy_regs.ctrl1000;
5869 break;
5870 case MII_STAT1000:
5871 data->val_out = adapter->phy_regs.stat1000;
5872 break;
5873 case MII_ESTATUS:
5874 data->val_out = adapter->phy_regs.estatus;
5875 break;
5876 default:
Auke Kokbc7f75f2007-09-17 12:30:59 -07005877 return -EIO;
5878 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07005879 break;
5880 case SIOCSMIIREG:
5881 default:
5882 return -EOPNOTSUPP;
5883 }
5884 return 0;
5885}
5886
Bruce Allanb67e1912012-12-27 08:32:33 +00005887/**
5888 * e1000e_hwtstamp_ioctl - control hardware time stamping
5889 * @netdev: network interface device structure
5890 * @ifreq: interface request
5891 *
5892 * Outgoing time stamping can be enabled and disabled. Play nice and
5893 * disable it when requested, although it shouldn't cause any overhead
5894 * when no packet needs it. At most one packet in the queue may be
5895 * marked for time stamping, otherwise it would be impossible to tell
5896 * for sure to which packet the hardware time stamp belongs.
5897 *
5898 * Incoming time stamping has to be configured via the hardware filters.
5899 * Not all combinations are supported, in particular event type has to be
5900 * specified. Matching the kind of event packet is not supported, with the
5901 * exception of "all V2 events regardless of level 2 or 4".
5902 **/
Ben Hutchings4e8cff62013-11-18 23:07:16 +00005903static int e1000e_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
Bruce Allanb67e1912012-12-27 08:32:33 +00005904{
5905 struct e1000_adapter *adapter = netdev_priv(netdev);
5906 struct hwtstamp_config config;
5907 int ret_val;
5908
5909 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5910 return -EFAULT;
5911
Ben Hutchings62d7e3a2013-11-14 00:41:38 +00005912 ret_val = e1000e_config_hwtstamp(adapter, &config);
Bruce Allanb67e1912012-12-27 08:32:33 +00005913 if (ret_val)
5914 return ret_val;
5915
Bruce Alland89777b2013-01-19 01:09:58 +00005916 switch (config.rx_filter) {
5917 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
5918 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
5919 case HWTSTAMP_FILTER_PTP_V2_SYNC:
5920 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
5921 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
5922 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
5923 /* With V2 type filters which specify a Sync or Delay Request,
5924 * Path Delay Request/Response messages are also time stamped
5925 * by hardware so notify the caller the requested packets plus
5926 * some others are time stamped.
5927 */
5928 config.rx_filter = HWTSTAMP_FILTER_SOME;
5929 break;
5930 default:
5931 break;
5932 }
5933
Bruce Allanb67e1912012-12-27 08:32:33 +00005934 return copy_to_user(ifr->ifr_data, &config,
5935 sizeof(config)) ? -EFAULT : 0;
5936}
5937
Ben Hutchings4e8cff62013-11-18 23:07:16 +00005938static int e1000e_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
5939{
5940 struct e1000_adapter *adapter = netdev_priv(netdev);
5941
5942 return copy_to_user(ifr->ifr_data, &adapter->hwtstamp_config,
5943 sizeof(adapter->hwtstamp_config)) ? -EFAULT : 0;
5944}
5945
Auke Kokbc7f75f2007-09-17 12:30:59 -07005946static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5947{
5948 switch (cmd) {
5949 case SIOCGMIIPHY:
5950 case SIOCGMIIREG:
5951 case SIOCSMIIREG:
5952 return e1000_mii_ioctl(netdev, ifr, cmd);
Bruce Allanb67e1912012-12-27 08:32:33 +00005953 case SIOCSHWTSTAMP:
Ben Hutchings4e8cff62013-11-18 23:07:16 +00005954 return e1000e_hwtstamp_set(netdev, ifr);
5955 case SIOCGHWTSTAMP:
5956 return e1000e_hwtstamp_get(netdev, ifr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07005957 default:
5958 return -EOPNOTSUPP;
5959 }
5960}
5961
Bruce Allana4f58f52009-06-02 11:29:18 +00005962static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5963{
5964 struct e1000_hw *hw = &adapter->hw;
David Ertman74f350e2014-02-22 03:15:17 +00005965 u32 i, mac_reg, wuc;
Bruce Allan2b6b1682011-05-13 07:20:09 +00005966 u16 phy_reg, wuc_enable;
Bruce Allan70806a72013-01-05 05:08:37 +00005967 int retval;
Bruce Allana4f58f52009-06-02 11:29:18 +00005968
5969 /* copy MAC RARs to PHY RARs */
Bruce Alland3738bb2010-06-16 13:27:28 +00005970 e1000_copy_rx_addrs_to_phy_ich8lan(hw);
Bruce Allana4f58f52009-06-02 11:29:18 +00005971
Bruce Allan2b6b1682011-05-13 07:20:09 +00005972 retval = hw->phy.ops.acquire(hw);
5973 if (retval) {
5974 e_err("Could not acquire PHY\n");
5975 return retval;
5976 }
5977
5978 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5979 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5980 if (retval)
Bruce Allan75ce1532012-02-08 02:54:48 +00005981 goto release;
Bruce Allan2b6b1682011-05-13 07:20:09 +00005982
5983 /* copy MAC MTA to PHY MTA - only needed for pchlan */
Bruce Allana4f58f52009-06-02 11:29:18 +00005984 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5985 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
Bruce Allan2b6b1682011-05-13 07:20:09 +00005986 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5987 (u16)(mac_reg & 0xFFFF));
5988 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5989 (u16)((mac_reg >> 16) & 0xFFFF));
Bruce Allana4f58f52009-06-02 11:29:18 +00005990 }
5991
5992 /* configure PHY Rx Control register */
Bruce Allan2b6b1682011-05-13 07:20:09 +00005993 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
Bruce Allana4f58f52009-06-02 11:29:18 +00005994 mac_reg = er32(RCTL);
5995 if (mac_reg & E1000_RCTL_UPE)
5996 phy_reg |= BM_RCTL_UPE;
5997 if (mac_reg & E1000_RCTL_MPE)
5998 phy_reg |= BM_RCTL_MPE;
5999 phy_reg &= ~(BM_RCTL_MO_MASK);
6000 if (mac_reg & E1000_RCTL_MO_3)
6001 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
Bruce Allan17e813e2013-02-20 04:06:01 +00006002 << BM_RCTL_MO_SHIFT);
Bruce Allana4f58f52009-06-02 11:29:18 +00006003 if (mac_reg & E1000_RCTL_BAM)
6004 phy_reg |= BM_RCTL_BAM;
6005 if (mac_reg & E1000_RCTL_PMCF)
6006 phy_reg |= BM_RCTL_PMCF;
6007 mac_reg = er32(CTRL);
6008 if (mac_reg & E1000_CTRL_RFCE)
6009 phy_reg |= BM_RCTL_RFCE;
Bruce Allan2b6b1682011-05-13 07:20:09 +00006010 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
Bruce Allana4f58f52009-06-02 11:29:18 +00006011
David Ertman74f350e2014-02-22 03:15:17 +00006012 wuc = E1000_WUC_PME_EN;
6013 if (wufc & (E1000_WUFC_MAG | E1000_WUFC_LNKC))
6014 wuc |= E1000_WUC_APME;
6015
Bruce Allana4f58f52009-06-02 11:29:18 +00006016 /* enable PHY wakeup in MAC register */
6017 ew32(WUFC, wufc);
David Ertman74f350e2014-02-22 03:15:17 +00006018 ew32(WUC, (E1000_WUC_PHY_WAKE | E1000_WUC_APMPME |
6019 E1000_WUC_PME_STATUS | wuc));
Bruce Allana4f58f52009-06-02 11:29:18 +00006020
6021 /* configure and enable PHY wakeup in PHY registers */
Bruce Allan2b6b1682011-05-13 07:20:09 +00006022 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
David Ertman74f350e2014-02-22 03:15:17 +00006023 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, wuc);
Bruce Allana4f58f52009-06-02 11:29:18 +00006024
6025 /* activate PHY wakeup */
Bruce Allan2b6b1682011-05-13 07:20:09 +00006026 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
6027 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
Bruce Allana4f58f52009-06-02 11:29:18 +00006028 if (retval)
6029 e_err("Could not set PHY Host Wakeup bit\n");
Bruce Allan75ce1532012-02-08 02:54:48 +00006030release:
Bruce Allan94d81862009-11-20 23:25:26 +00006031 hw->phy.ops.release(hw);
Bruce Allana4f58f52009-06-02 11:29:18 +00006032
6033 return retval;
6034}
6035
David Ertman28002092014-02-14 07:16:41 +00006036static int e1000e_pm_freeze(struct device *dev)
Auke Kokbc7f75f2007-09-17 12:30:59 -07006037{
David Ertman28002092014-02-14 07:16:41 +00006038 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
Auke Kokbc7f75f2007-09-17 12:30:59 -07006039 struct e1000_adapter *adapter = netdev_priv(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006040
6041 netif_device_detach(netdev);
6042
6043 if (netif_running(netdev)) {
Bruce Allanbb9e44d2012-03-21 00:39:12 +00006044 int count = E1000_CHECK_RESET_COUNT;
6045
6046 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
6047 usleep_range(10000, 20000);
6048
Auke Kokbc7f75f2007-09-17 12:30:59 -07006049 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
David Ertman28002092014-02-14 07:16:41 +00006050
6051 /* Quiesce the device without resetting the hardware */
6052 e1000e_down(adapter, false);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006053 e1000_free_irq(adapter);
6054 }
Bruce Allan4662e822008-08-26 18:37:06 -07006055 e1000e_reset_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006056
David Ertman28002092014-02-14 07:16:41 +00006057 /* Allow time for pending master requests to run */
6058 e1000e_disable_pcie_master(&adapter->hw);
6059
6060 return 0;
6061}
6062
6063static int __e1000_shutdown(struct pci_dev *pdev, bool runtime)
6064{
6065 struct net_device *netdev = pci_get_drvdata(pdev);
6066 struct e1000_adapter *adapter = netdev_priv(netdev);
6067 struct e1000_hw *hw = &adapter->hw;
6068 u32 ctrl, ctrl_ext, rctl, status;
6069 /* Runtime suspend should only enable wakeup for link changes */
6070 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
6071 int retval = 0;
6072
Auke Kokbc7f75f2007-09-17 12:30:59 -07006073 status = er32(STATUS);
6074 if (status & E1000_STATUS_LU)
6075 wufc &= ~E1000_WUFC_LNKC;
6076
6077 if (wufc) {
6078 e1000_setup_rctl(adapter);
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00006079 e1000e_set_rx_mode(netdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006080
6081 /* turn on all-multi mode if wake on multicast is enabled */
6082 if (wufc & E1000_WUFC_MC) {
6083 rctl = er32(RCTL);
6084 rctl |= E1000_RCTL_MPE;
6085 ew32(RCTL, rctl);
6086 }
6087
6088 ctrl = er32(CTRL);
Bruce Allana4f58f52009-06-02 11:29:18 +00006089 ctrl |= E1000_CTRL_ADVD3WUC;
6090 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
6091 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006092 ew32(CTRL, ctrl);
6093
Jeff Kirsher318a94d2008-03-28 09:15:16 -07006094 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
6095 adapter->hw.phy.media_type ==
6096 e1000_media_type_internal_serdes) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07006097 /* keep the laser running in D3 */
6098 ctrl_ext = er32(CTRL_EXT);
Bruce Allan93a23f42009-12-08 07:27:41 +00006099 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006100 ew32(CTRL_EXT, ctrl_ext);
6101 }
6102
David Ertman63eb48f2014-02-14 07:16:46 +00006103 if (!runtime)
6104 e1000e_power_up_phy(adapter);
6105
Bruce Allan97ac8ca2008-04-29 09:16:05 -07006106 if (adapter->flags & FLAG_IS_ICH)
Bruce Allan99730e42011-05-13 07:19:48 +00006107 e1000_suspend_workarounds_ich8lan(&adapter->hw);
Bruce Allan97ac8ca2008-04-29 09:16:05 -07006108
Bruce Allan82776a42009-08-14 14:35:33 +00006109 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
Bruce Allana4f58f52009-06-02 11:29:18 +00006110 /* enable wakeup by the PHY */
6111 retval = e1000_init_phy_wakeup(adapter, wufc);
6112 if (retval)
6113 return retval;
6114 } else {
6115 /* enable wakeup by the MAC */
6116 ew32(WUFC, wufc);
6117 ew32(WUC, E1000_WUC_PME_EN);
6118 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07006119 } else {
6120 ew32(WUC, 0);
6121 ew32(WUFC, 0);
David Ertman28002092014-02-14 07:16:41 +00006122
6123 e1000_power_down_phy(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006124 }
6125
David Ertman74f350e2014-02-22 03:15:17 +00006126 if (adapter->hw.phy.type == e1000_phy_igp_3) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07006127 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
David Ertman74f350e2014-02-22 03:15:17 +00006128 } else if (hw->mac.type == e1000_pch_lpt) {
6129 if (!(wufc & (E1000_WUFC_EX | E1000_WUFC_MC | E1000_WUFC_BC)))
6130 /* ULP does not support wake from unicast, multicast
6131 * or broadcast.
6132 */
6133 retval = e1000_enable_ulp_lpt_lp(hw, !runtime);
6134
6135 if (retval)
6136 return retval;
6137 }
6138
Auke Kokbc7f75f2007-09-17 12:30:59 -07006139
Bruce Allane921eb12012-11-28 09:28:37 +00006140 /* Release control of h/w to f/w. If f/w is AMT enabled, this
Bruce Allanad680762008-03-28 09:15:03 -07006141 * would have already happened in close and is redundant.
6142 */
Bruce Allan31dbe5b2011-01-06 14:29:52 +00006143 e1000e_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006144
Dean Nelson24b41c92013-06-13 03:55:44 +00006145 pci_clear_master(pdev);
6146
Bruce Allane921eb12012-11-28 09:28:37 +00006147 /* The pci-e switch on some quad port adapters will report a
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006148 * correctable error when the MAC transitions from D0 to D3. To
6149 * prevent this we need to mask off the correctable errors on the
6150 * downstream port of the pci-e switch.
Li Zhange8c254c2013-08-13 18:42:58 +00006151 *
6152 * We don't have the associated upstream bridge while assigning
6153 * the PCI device into guest. For example, the KVM on power is
6154 * one of the cases.
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006155 */
6156 if (adapter->flags & FLAG_IS_QUAD_PORT) {
6157 struct pci_dev *us_dev = pdev->bus->self;
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006158 u16 devctl;
6159
Li Zhange8c254c2013-08-13 18:42:58 +00006160 if (!us_dev)
6161 return 0;
6162
Jiang Liuf8c0fca2012-08-20 13:30:43 -06006163 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
6164 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
6165 (devctl & ~PCI_EXP_DEVCTL_CERE));
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006166
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006167 pci_save_state(pdev);
6168 pci_prepare_to_sleep(pdev);
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006169
Jiang Liuf8c0fca2012-08-20 13:30:43 -06006170 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
Alexander Duyck005cbdf2008-11-21 16:49:10 -08006171 }
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006172
6173 return 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006174}
6175
Carolyn Wyborny13129d92013-08-03 01:53:54 +00006176/**
6177 * e1000e_disable_aspm - Disable ASPM states
6178 * @pdev: pointer to PCI device struct
6179 * @state: bit-mask of ASPM states to disable
6180 *
6181 * Some devices *must* have certain ASPM states disabled per hardware errata.
6182 **/
6183static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
Bruce Allan6f461f62010-04-27 03:33:04 +00006184{
Carolyn Wyborny13129d92013-08-03 01:53:54 +00006185 struct pci_dev *parent = pdev->bus->self;
6186 u16 aspm_dis_mask = 0;
6187 u16 pdev_aspmc, parent_aspmc;
Bjorn Helgaasffe0b2ff2012-12-06 06:40:07 +00006188
Carolyn Wyborny13129d92013-08-03 01:53:54 +00006189 switch (state) {
6190 case PCIE_LINK_STATE_L0S:
6191 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1:
6192 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S;
6193 /* fall-through - can't have L1 without L0s */
6194 case PCIE_LINK_STATE_L1:
6195 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1;
6196 break;
6197 default:
6198 return;
6199 }
6200
6201 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc);
6202 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6203
6204 if (parent) {
6205 pcie_capability_read_word(parent, PCI_EXP_LNKCTL,
6206 &parent_aspmc);
6207 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6208 }
6209
6210 /* Nothing to do if the ASPM states to be disabled already are */
6211 if (!(pdev_aspmc & aspm_dis_mask) &&
6212 (!parent || !(parent_aspmc & aspm_dis_mask)))
6213 return;
6214
6215 dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
6216 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ?
6217 "L0s" : "",
6218 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ?
6219 "L1" : "");
6220
6221#ifdef CONFIG_PCIEASPM
6222 pci_disable_link_state_locked(pdev, state);
6223
6224 /* Double-check ASPM control. If not disabled by the above, the
6225 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is
6226 * not enabled); override by writing PCI config space directly.
6227 */
6228 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc);
6229 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6230
6231 if (!(aspm_dis_mask & pdev_aspmc))
6232 return;
6233#endif
Bjorn Helgaasffe0b2ff2012-12-06 06:40:07 +00006234
Bruce Allane921eb12012-11-28 09:28:37 +00006235 /* Both device and parent should have the same ASPM setting.
Bruce Allan6f461f62010-04-27 03:33:04 +00006236 * Disable ASPM in downstream component first and then upstream.
Auke Kok1eae4eb2007-10-31 15:22:00 -07006237 */
Carolyn Wyborny13129d92013-08-03 01:53:54 +00006238 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask);
Bruce Allan6f461f62010-04-27 03:33:04 +00006239
Carolyn Wyborny13129d92013-08-03 01:53:54 +00006240 if (parent)
6241 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL,
6242 aspm_dis_mask);
Auke Kok1eae4eb2007-10-31 15:22:00 -07006243}
6244
Rafael J. Wysockiaa338602011-02-11 00:06:54 +01006245#ifdef CONFIG_PM
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006246static int __e1000_resume(struct pci_dev *pdev)
Auke Kokbc7f75f2007-09-17 12:30:59 -07006247{
6248 struct net_device *netdev = pci_get_drvdata(pdev);
6249 struct e1000_adapter *adapter = netdev_priv(netdev);
6250 struct e1000_hw *hw = &adapter->hw;
Bruce Allan78cd29d2011-03-24 03:09:03 +00006251 u16 aspm_disable_flag = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006252
Bruce Allan78cd29d2011-03-24 03:09:03 +00006253 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6254 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6255 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6256 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6257 if (aspm_disable_flag)
6258 e1000e_disable_aspm(pdev, aspm_disable_flag);
6259
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006260 pci_set_master(pdev);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09006261
Bruce Allan2fbe4522012-04-19 03:21:47 +00006262 if (hw->mac.type >= e1000_pch2lan)
Bruce Allan99730e42011-05-13 07:19:48 +00006263 e1000_resume_workarounds_pchlan(&adapter->hw);
6264
Auke Kokbc7f75f2007-09-17 12:30:59 -07006265 e1000e_power_up_phy(adapter);
Bruce Allana4f58f52009-06-02 11:29:18 +00006266
6267 /* report the system wakeup cause from S3/S4 */
6268 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
6269 u16 phy_data;
6270
6271 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
6272 if (phy_data) {
6273 e_info("PHY Wakeup cause - %s\n",
Bruce Allan17e813e2013-02-20 04:06:01 +00006274 phy_data & E1000_WUS_EX ? "Unicast Packet" :
6275 phy_data & E1000_WUS_MC ? "Multicast Packet" :
6276 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
6277 phy_data & E1000_WUS_MAG ? "Magic Packet" :
6278 phy_data & E1000_WUS_LNKC ?
6279 "Link Status Change" : "other");
Bruce Allana4f58f52009-06-02 11:29:18 +00006280 }
6281 e1e_wphy(&adapter->hw, BM_WUS, ~0);
6282 } else {
6283 u32 wus = er32(WUS);
David Ertman6cf08d12014-04-05 06:07:00 +00006284
Bruce Allana4f58f52009-06-02 11:29:18 +00006285 if (wus) {
6286 e_info("MAC Wakeup cause - %s\n",
Bruce Allan17e813e2013-02-20 04:06:01 +00006287 wus & E1000_WUS_EX ? "Unicast Packet" :
6288 wus & E1000_WUS_MC ? "Multicast Packet" :
6289 wus & E1000_WUS_BC ? "Broadcast Packet" :
6290 wus & E1000_WUS_MAG ? "Magic Packet" :
6291 wus & E1000_WUS_LNKC ? "Link Status Change" :
6292 "other");
Bruce Allana4f58f52009-06-02 11:29:18 +00006293 }
6294 ew32(WUS, ~0);
6295 }
6296
Auke Kokbc7f75f2007-09-17 12:30:59 -07006297 e1000e_reset(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006298
Bruce Allancd791612010-05-10 14:59:51 +00006299 e1000_init_manageability_pt(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006300
Bruce Allane921eb12012-11-28 09:28:37 +00006301 /* If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07006302 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07006303 * under the control of the driver.
6304 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07006305 if (!(adapter->flags & FLAG_HAS_AMT))
Bruce Allan31dbe5b2011-01-06 14:29:52 +00006306 e1000e_get_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006307
6308 return 0;
6309}
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006310
Hiroaki SHIMODA3e7986f2014-04-15 08:20:19 +00006311#ifdef CONFIG_PM_SLEEP
David Ertman28002092014-02-14 07:16:41 +00006312static int e1000e_pm_thaw(struct device *dev)
6313{
6314 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
6315 struct e1000_adapter *adapter = netdev_priv(netdev);
6316
6317 e1000e_set_interrupt_capability(adapter);
6318 if (netif_running(netdev)) {
6319 u32 err = e1000_request_irq(adapter);
6320
6321 if (err)
6322 return err;
6323
6324 e1000e_up(adapter);
6325 }
6326
6327 netif_device_attach(netdev);
6328
6329 return 0;
6330}
6331
David Ertman28002092014-02-14 07:16:41 +00006332static int e1000e_pm_suspend(struct device *dev)
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006333{
6334 struct pci_dev *pdev = to_pci_dev(dev);
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006335
David Ertman28002092014-02-14 07:16:41 +00006336 e1000e_pm_freeze(dev);
6337
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006338 return __e1000_shutdown(pdev, false);
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006339}
6340
David Ertman28002092014-02-14 07:16:41 +00006341static int e1000e_pm_resume(struct device *dev)
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006342{
6343 struct pci_dev *pdev = to_pci_dev(dev);
David Ertman28002092014-02-14 07:16:41 +00006344 int rc;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006345
David Ertman28002092014-02-14 07:16:41 +00006346 rc = __e1000_resume(pdev);
6347 if (rc)
6348 return rc;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006349
David Ertman28002092014-02-14 07:16:41 +00006350 return e1000e_pm_thaw(dev);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006351}
Mika Westerberg38a529b2014-01-16 14:39:39 +02006352#endif /* CONFIG_PM_SLEEP */
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006353
6354#ifdef CONFIG_PM_RUNTIME
David Ertman63eb48f2014-02-14 07:16:46 +00006355static int e1000e_pm_runtime_idle(struct device *dev)
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006356{
6357 struct pci_dev *pdev = to_pci_dev(dev);
6358 struct net_device *netdev = pci_get_drvdata(pdev);
6359 struct e1000_adapter *adapter = netdev_priv(netdev);
David Ertman2116bc22014-07-11 06:21:23 +00006360 u16 eee_lp;
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006361
David Ertman2116bc22014-07-11 06:21:23 +00006362 eee_lp = adapter->hw.dev_spec.ich8lan.eee_lp_ability;
6363
6364 if (!e1000e_has_link(adapter)) {
6365 adapter->hw.dev_spec.ich8lan.eee_lp_ability = eee_lp;
David Ertman63eb48f2014-02-14 07:16:46 +00006366 pm_schedule_suspend(dev, 5 * MSEC_PER_SEC);
David Ertman2116bc22014-07-11 06:21:23 +00006367 }
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006368
6369 return -EBUSY;
6370}
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006371
David Ertman63eb48f2014-02-14 07:16:46 +00006372static int e1000e_pm_runtime_resume(struct device *dev)
6373{
6374 struct pci_dev *pdev = to_pci_dev(dev);
6375 struct net_device *netdev = pci_get_drvdata(pdev);
6376 struct e1000_adapter *adapter = netdev_priv(netdev);
6377 int rc;
6378
6379 rc = __e1000_resume(pdev);
6380 if (rc)
6381 return rc;
6382
6383 if (netdev->flags & IFF_UP)
6384 rc = e1000e_up(adapter);
6385
6386 return rc;
6387}
6388
6389static int e1000e_pm_runtime_suspend(struct device *dev)
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006390{
6391 struct pci_dev *pdev = to_pci_dev(dev);
6392 struct net_device *netdev = pci_get_drvdata(pdev);
6393 struct e1000_adapter *adapter = netdev_priv(netdev);
6394
David Ertman63eb48f2014-02-14 07:16:46 +00006395 if (netdev->flags & IFF_UP) {
6396 int count = E1000_CHECK_RESET_COUNT;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006397
David Ertman63eb48f2014-02-14 07:16:46 +00006398 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
6399 usleep_range(10000, 20000);
6400
6401 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
6402
6403 /* Down the device without resetting the hardware */
6404 e1000e_down(adapter, false);
6405 }
6406
6407 if (__e1000_shutdown(pdev, true)) {
6408 e1000e_pm_runtime_resume(dev);
6409 return -EBUSY;
6410 }
6411
6412 return 0;
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006413}
Rafael J. Wysockia0340162010-03-17 23:12:24 -07006414#endif /* CONFIG_PM_RUNTIME */
Rafael J. Wysockiaa338602011-02-11 00:06:54 +01006415#endif /* CONFIG_PM */
Auke Kokbc7f75f2007-09-17 12:30:59 -07006416
6417static void e1000_shutdown(struct pci_dev *pdev)
6418{
David Ertman28002092014-02-14 07:16:41 +00006419 e1000e_pm_freeze(&pdev->dev);
6420
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006421 __e1000_shutdown(pdev, false);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006422}
6423
6424#ifdef CONFIG_NET_POLL_CONTROLLER
Dongdong Deng147b2c82010-11-16 19:50:15 -08006425
Bruce Allan8bb62862013-01-16 08:46:49 +00006426static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data)
Dongdong Deng147b2c82010-11-16 19:50:15 -08006427{
6428 struct net_device *netdev = data;
6429 struct e1000_adapter *adapter = netdev_priv(netdev);
Dongdong Deng147b2c82010-11-16 19:50:15 -08006430
6431 if (adapter->msix_entries) {
Bruce Allan90da0662011-01-06 07:02:53 +00006432 int vector, msix_irq;
6433
Dongdong Deng147b2c82010-11-16 19:50:15 -08006434 vector = 0;
6435 msix_irq = adapter->msix_entries[vector].vector;
6436 disable_irq(msix_irq);
6437 e1000_intr_msix_rx(msix_irq, netdev);
6438 enable_irq(msix_irq);
6439
6440 vector++;
6441 msix_irq = adapter->msix_entries[vector].vector;
6442 disable_irq(msix_irq);
6443 e1000_intr_msix_tx(msix_irq, netdev);
6444 enable_irq(msix_irq);
6445
6446 vector++;
6447 msix_irq = adapter->msix_entries[vector].vector;
6448 disable_irq(msix_irq);
6449 e1000_msix_other(msix_irq, netdev);
6450 enable_irq(msix_irq);
6451 }
6452
6453 return IRQ_HANDLED;
6454}
6455
Bruce Allane921eb12012-11-28 09:28:37 +00006456/**
6457 * e1000_netpoll
6458 * @netdev: network interface device structure
6459 *
Auke Kokbc7f75f2007-09-17 12:30:59 -07006460 * Polling 'interrupt' - used by things like netconsole to send skbs
6461 * without having to re-enable interrupts. It's not called while
6462 * the interrupt routine is executing.
6463 */
6464static void e1000_netpoll(struct net_device *netdev)
6465{
6466 struct e1000_adapter *adapter = netdev_priv(netdev);
6467
Dongdong Deng147b2c82010-11-16 19:50:15 -08006468 switch (adapter->int_mode) {
6469 case E1000E_INT_MODE_MSIX:
6470 e1000_intr_msix(adapter->pdev->irq, netdev);
6471 break;
6472 case E1000E_INT_MODE_MSI:
6473 disable_irq(adapter->pdev->irq);
6474 e1000_intr_msi(adapter->pdev->irq, netdev);
6475 enable_irq(adapter->pdev->irq);
6476 break;
Bruce Allane80bd1d2013-05-01 01:19:46 +00006477 default: /* E1000E_INT_MODE_LEGACY */
Dongdong Deng147b2c82010-11-16 19:50:15 -08006478 disable_irq(adapter->pdev->irq);
6479 e1000_intr(adapter->pdev->irq, netdev);
6480 enable_irq(adapter->pdev->irq);
6481 break;
6482 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07006483}
6484#endif
6485
6486/**
6487 * e1000_io_error_detected - called when PCI error is detected
6488 * @pdev: Pointer to PCI device
6489 * @state: The current pci connection state
6490 *
6491 * This function is called after a PCI bus error affecting
6492 * this device has been detected.
6493 */
6494static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
6495 pci_channel_state_t state)
6496{
6497 struct net_device *netdev = pci_get_drvdata(pdev);
6498 struct e1000_adapter *adapter = netdev_priv(netdev);
6499
6500 netif_device_detach(netdev);
6501
Mike Masonc93b5a72009-06-30 12:45:53 +00006502 if (state == pci_channel_io_perm_failure)
6503 return PCI_ERS_RESULT_DISCONNECT;
6504
Auke Kokbc7f75f2007-09-17 12:30:59 -07006505 if (netif_running(netdev))
David Ertman28002092014-02-14 07:16:41 +00006506 e1000e_down(adapter, true);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006507 pci_disable_device(pdev);
6508
6509 /* Request a slot slot reset. */
6510 return PCI_ERS_RESULT_NEED_RESET;
6511}
6512
6513/**
6514 * e1000_io_slot_reset - called after the pci bus has been reset.
6515 * @pdev: Pointer to PCI device
6516 *
6517 * Restart the card from scratch, as if from a cold-boot. Implementation
David Ertman28002092014-02-14 07:16:41 +00006518 * resembles the first-half of the e1000e_pm_resume routine.
Auke Kokbc7f75f2007-09-17 12:30:59 -07006519 */
6520static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
6521{
6522 struct net_device *netdev = pci_get_drvdata(pdev);
6523 struct e1000_adapter *adapter = netdev_priv(netdev);
6524 struct e1000_hw *hw = &adapter->hw;
Bruce Allan78cd29d2011-03-24 03:09:03 +00006525 u16 aspm_disable_flag = 0;
Taku Izumi6e4f6f62008-06-20 11:57:02 +09006526 int err;
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006527 pci_ers_result_t result;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006528
Bruce Allan78cd29d2011-03-24 03:09:03 +00006529 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6530 aspm_disable_flag = PCIE_LINK_STATE_L0S;
Bruce Allan6f461f62010-04-27 03:33:04 +00006531 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
Bruce Allan78cd29d2011-03-24 03:09:03 +00006532 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6533 if (aspm_disable_flag)
6534 e1000e_disable_aspm(pdev, aspm_disable_flag);
6535
Bruce Allanf0f422e2008-08-04 17:21:53 -07006536 err = pci_enable_device_mem(pdev);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09006537 if (err) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07006538 dev_err(&pdev->dev,
6539 "Cannot re-enable PCI device after reset.\n");
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006540 result = PCI_ERS_RESULT_DISCONNECT;
6541 } else {
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00006542 pdev->state_saved = true;
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006543 pci_restore_state(pdev);
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006544 pci_set_master(pdev);
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006545
6546 pci_enable_wake(pdev, PCI_D3hot, 0);
6547 pci_enable_wake(pdev, PCI_D3cold, 0);
6548
6549 e1000e_reset(adapter);
6550 ew32(WUS, ~0);
6551 result = PCI_ERS_RESULT_RECOVERED;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006552 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07006553
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006554 pci_cleanup_aer_uncorrect_error_status(pdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006555
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00006556 return result;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006557}
6558
6559/**
6560 * e1000_io_resume - called when traffic can start flowing again.
6561 * @pdev: Pointer to PCI device
6562 *
6563 * This callback is called when the error recovery driver tells us that
6564 * its OK to resume normal operation. Implementation resembles the
David Ertman28002092014-02-14 07:16:41 +00006565 * second-half of the e1000e_pm_resume routine.
Auke Kokbc7f75f2007-09-17 12:30:59 -07006566 */
6567static void e1000_io_resume(struct pci_dev *pdev)
6568{
6569 struct net_device *netdev = pci_get_drvdata(pdev);
6570 struct e1000_adapter *adapter = netdev_priv(netdev);
6571
Bruce Allancd791612010-05-10 14:59:51 +00006572 e1000_init_manageability_pt(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006573
6574 if (netif_running(netdev)) {
6575 if (e1000e_up(adapter)) {
6576 dev_err(&pdev->dev,
6577 "can't bring device back up after reset\n");
6578 return;
6579 }
6580 }
6581
6582 netif_device_attach(netdev);
6583
Bruce Allane921eb12012-11-28 09:28:37 +00006584 /* If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07006585 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07006586 * under the control of the driver.
6587 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07006588 if (!(adapter->flags & FLAG_HAS_AMT))
Bruce Allan31dbe5b2011-01-06 14:29:52 +00006589 e1000e_get_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006590}
6591
6592static void e1000_print_device_info(struct e1000_adapter *adapter)
6593{
6594 struct e1000_hw *hw = &adapter->hw;
6595 struct net_device *netdev = adapter->netdev;
Bruce Allan073287c2010-11-24 06:01:51 +00006596 u32 ret_val;
6597 u8 pba_str[E1000_PBANUM_LENGTH];
Auke Kokbc7f75f2007-09-17 12:30:59 -07006598
6599 /* print bus type/speed/width info */
Bruce Allana5cc7642011-03-19 00:31:23 +00006600 e_info("(PCI Express:2.5GT/s:%s) %pM\n",
Jeff Kirsher44defeb2008-08-04 17:20:41 -07006601 /* bus width */
6602 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
Bruce Allanf0ff4392013-02-20 04:05:39 +00006603 "Width x1"),
Jeff Kirsher44defeb2008-08-04 17:20:41 -07006604 /* MAC address */
Johannes Berg7c510e42008-10-27 17:47:26 -07006605 netdev->dev_addr);
Jeff Kirsher44defeb2008-08-04 17:20:41 -07006606 e_info("Intel(R) PRO/%s Network Connection\n",
6607 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
Bruce Allan073287c2010-11-24 06:01:51 +00006608 ret_val = e1000_read_pba_string_generic(hw, pba_str,
6609 E1000_PBANUM_LENGTH);
6610 if (ret_val)
Bruce Allanf2315bf2011-12-16 00:46:59 +00006611 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
Bruce Allan073287c2010-11-24 06:01:51 +00006612 e_info("MAC: %d, PHY: %d, PBA No: %s\n",
6613 hw->mac.type, hw->phy.type, pba_str);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006614}
6615
Auke Kok10aa4c02008-08-04 17:21:20 -07006616static void e1000_eeprom_checks(struct e1000_adapter *adapter)
6617{
6618 struct e1000_hw *hw = &adapter->hw;
6619 int ret_val;
6620 u16 buf = 0;
6621
6622 if (hw->mac.type != e1000_82573)
6623 return;
6624
6625 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
Bruce Allane885d762012-01-31 06:37:32 +00006626 le16_to_cpus(&buf);
6627 if (!ret_val && (!(buf & (1 << 0)))) {
Auke Kok10aa4c02008-08-04 17:21:20 -07006628 /* Deep Smart Power Down (DSPD) */
Frans Pop6c2a9ef2008-09-22 14:52:22 -07006629 dev_warn(&adapter->pdev->dev,
6630 "Warning: detected DSPD enabled in EEPROM\n");
Auke Kok10aa4c02008-08-04 17:21:20 -07006631 }
Auke Kok10aa4c02008-08-04 17:21:20 -07006632}
6633
Michał Mirosławc8f44af2011-11-15 15:29:55 +00006634static int e1000_set_features(struct net_device *netdev,
Bruce Allan70495a52012-01-11 01:26:50 +00006635 netdev_features_t features)
Bruce Allandc221292011-08-19 03:23:48 +00006636{
6637 struct e1000_adapter *adapter = netdev_priv(netdev);
Michał Mirosławc8f44af2011-11-15 15:29:55 +00006638 netdev_features_t changed = features ^ netdev->features;
Bruce Allandc221292011-08-19 03:23:48 +00006639
6640 if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6641 adapter->flags |= FLAG_TSO_FORCE;
6642
Patrick McHardyf6469682013-04-19 02:04:27 +00006643 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX |
Ben Greearcf955e62012-02-11 15:39:51 +00006644 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6645 NETIF_F_RXALL)))
Bruce Allandc221292011-08-19 03:23:48 +00006646 return 0;
6647
Ben Greear01840392012-02-11 15:39:25 +00006648 if (changed & NETIF_F_RXFCS) {
6649 if (features & NETIF_F_RXFCS) {
6650 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6651 } else {
6652 /* We need to take it back to defaults, which might mean
6653 * stripping is still disabled at the adapter level.
6654 */
6655 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6656 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6657 else
6658 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6659 }
6660 }
6661
Bruce Allan70495a52012-01-11 01:26:50 +00006662 netdev->features = features;
6663
Bruce Allandc221292011-08-19 03:23:48 +00006664 if (netif_running(netdev))
6665 e1000e_reinit_locked(adapter);
6666 else
6667 e1000e_reset(adapter);
6668
6669 return 0;
6670}
6671
Stephen Hemminger651c2462008-11-19 21:57:48 -08006672static const struct net_device_ops e1000e_netdev_ops = {
6673 .ndo_open = e1000_open,
6674 .ndo_stop = e1000_close,
Stephen Hemminger00829822008-11-20 20:14:53 -08006675 .ndo_start_xmit = e1000_xmit_frame,
Jeff Kirsher67fd4fc2011-01-07 05:12:09 +00006676 .ndo_get_stats64 = e1000e_get_stats64,
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00006677 .ndo_set_rx_mode = e1000e_set_rx_mode,
Stephen Hemminger651c2462008-11-19 21:57:48 -08006678 .ndo_set_mac_address = e1000_set_mac,
6679 .ndo_change_mtu = e1000_change_mtu,
6680 .ndo_do_ioctl = e1000_ioctl,
6681 .ndo_tx_timeout = e1000_tx_timeout,
6682 .ndo_validate_addr = eth_validate_addr,
6683
Stephen Hemminger651c2462008-11-19 21:57:48 -08006684 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
6685 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
6686#ifdef CONFIG_NET_POLL_CONTROLLER
6687 .ndo_poll_controller = e1000_netpoll,
6688#endif
Bruce Allandc221292011-08-19 03:23:48 +00006689 .ndo_set_features = e1000_set_features,
Stephen Hemminger651c2462008-11-19 21:57:48 -08006690};
6691
Auke Kokbc7f75f2007-09-17 12:30:59 -07006692/**
6693 * e1000_probe - Device Initialization Routine
6694 * @pdev: PCI device information struct
6695 * @ent: entry in e1000_pci_tbl
6696 *
6697 * Returns 0 on success, negative on failure
6698 *
6699 * e1000_probe initializes an adapter identified by a pci_dev structure.
6700 * The OS initialization, configuring of the adapter private structure,
6701 * and a hardware reset occur.
6702 **/
Greg Kroah-Hartman1dd06ae2012-12-06 14:30:56 +00006703static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
Auke Kokbc7f75f2007-09-17 12:30:59 -07006704{
6705 struct net_device *netdev;
6706 struct e1000_adapter *adapter;
6707 struct e1000_hw *hw;
6708 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
Becky Brucef47e81f2008-05-01 18:03:11 -05006709 resource_size_t mmio_start, mmio_len;
6710 resource_size_t flash_start, flash_len;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006711 static int cards_found;
Bruce Allan78cd29d2011-03-24 03:09:03 +00006712 u16 aspm_disable_flag = 0;
Bruce Allan17e813e2013-02-20 04:06:01 +00006713 int bars, i, err, pci_using_dac;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006714 u16 eeprom_data = 0;
6715 u16 eeprom_apme_mask = E1000_EEPROM_APME;
David Ertman491a04d2014-07-09 16:07:42 +00006716 s32 rval = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006717
Bruce Allan78cd29d2011-03-24 03:09:03 +00006718 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6719 aspm_disable_flag = PCIE_LINK_STATE_L0S;
Bruce Allan6f461f62010-04-27 03:33:04 +00006720 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
Bruce Allan78cd29d2011-03-24 03:09:03 +00006721 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6722 if (aspm_disable_flag)
6723 e1000e_disable_aspm(pdev, aspm_disable_flag);
Taku Izumi6e4f6f62008-06-20 11:57:02 +09006724
Bruce Allanf0f422e2008-08-04 17:21:53 -07006725 err = pci_enable_device_mem(pdev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006726 if (err)
6727 return err;
6728
6729 pci_using_dac = 0;
Russell King718a39e2013-06-10 12:22:30 +01006730 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
Auke Kokbc7f75f2007-09-17 12:30:59 -07006731 if (!err) {
Russell King718a39e2013-06-10 12:22:30 +01006732 pci_using_dac = 1;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006733 } else {
Russell King718a39e2013-06-10 12:22:30 +01006734 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
Auke Kokbc7f75f2007-09-17 12:30:59 -07006735 if (err) {
Russell King718a39e2013-06-10 12:22:30 +01006736 dev_err(&pdev->dev,
6737 "No usable DMA configuration, aborting\n");
6738 goto err_dma;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006739 }
6740 }
6741
Bruce Allan17e813e2013-02-20 04:06:01 +00006742 bars = pci_select_bars(pdev, IORESOURCE_MEM);
6743 err = pci_request_selected_regions_exclusive(pdev, bars,
6744 e1000e_driver_name);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006745 if (err)
6746 goto err_pci_reg;
6747
Xiaotian Feng68eac462009-08-14 14:35:52 +00006748 /* AER (Advanced Error Reporting) hooks */
Frans Pop19d5afd2009-10-02 10:04:12 -07006749 pci_enable_pcie_error_reporting(pdev);
Xiaotian Feng68eac462009-08-14 14:35:52 +00006750
Auke Kokbc7f75f2007-09-17 12:30:59 -07006751 pci_set_master(pdev);
Bruce Allan438b3652008-11-21 16:51:33 -08006752 /* PCI config space info */
6753 err = pci_save_state(pdev);
6754 if (err)
6755 goto err_alloc_etherdev;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006756
6757 err = -ENOMEM;
6758 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6759 if (!netdev)
6760 goto err_alloc_etherdev;
6761
Auke Kokbc7f75f2007-09-17 12:30:59 -07006762 SET_NETDEV_DEV(netdev, &pdev->dev);
6763
Tom Herbertf85e4df2010-05-05 14:03:32 +00006764 netdev->irq = pdev->irq;
6765
Auke Kokbc7f75f2007-09-17 12:30:59 -07006766 pci_set_drvdata(pdev, netdev);
6767 adapter = netdev_priv(netdev);
6768 hw = &adapter->hw;
6769 adapter->netdev = netdev;
6770 adapter->pdev = pdev;
6771 adapter->ei = ei;
6772 adapter->pba = ei->pba;
6773 adapter->flags = ei->flags;
Jeff Kirshereb7c3ad2008-11-14 06:45:23 +00006774 adapter->flags2 = ei->flags2;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006775 adapter->hw.adapter = adapter;
6776 adapter->hw.mac.type = ei->mac;
Bruce Allan2adc55c2009-06-02 11:28:58 +00006777 adapter->max_hw_frame_size = ei->max_hw_frame_size;
stephen hemmingerb3f4d592012-03-13 06:04:20 +00006778 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006779
6780 mmio_start = pci_resource_start(pdev, 0);
6781 mmio_len = pci_resource_len(pdev, 0);
6782
6783 err = -EIO;
6784 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6785 if (!adapter->hw.hw_addr)
6786 goto err_ioremap;
6787
6788 if ((adapter->flags & FLAG_HAS_FLASH) &&
6789 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6790 flash_start = pci_resource_start(pdev, 1);
6791 flash_len = pci_resource_len(pdev, 1);
6792 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6793 if (!adapter->hw.flash_address)
6794 goto err_flashmap;
6795 }
6796
Bruce Alland495bcb2013-03-20 07:23:11 +00006797 /* Set default EEE advertisement */
6798 if (adapter->flags2 & FLAG2_HAS_EEE)
6799 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T;
6800
Auke Kokbc7f75f2007-09-17 12:30:59 -07006801 /* construct the net_device struct */
Bruce Allane80bd1d2013-05-01 01:19:46 +00006802 netdev->netdev_ops = &e1000e_netdev_ops;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006803 e1000e_set_ethtool_ops(netdev);
Bruce Allane80bd1d2013-05-01 01:19:46 +00006804 netdev->watchdog_timeo = 5 * HZ;
Bruce Allanc58c8a72012-03-20 03:48:19 +00006805 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
Bruce Allanf2315bf2011-12-16 00:46:59 +00006806 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
Auke Kokbc7f75f2007-09-17 12:30:59 -07006807
6808 netdev->mem_start = mmio_start;
6809 netdev->mem_end = mmio_start + mmio_len;
6810
6811 adapter->bd_number = cards_found++;
6812
Bruce Allan4662e822008-08-26 18:37:06 -07006813 e1000e_check_options(adapter);
6814
Auke Kokbc7f75f2007-09-17 12:30:59 -07006815 /* setup adapter struct */
6816 err = e1000_sw_init(adapter);
6817 if (err)
6818 goto err_sw_init;
6819
Auke Kokbc7f75f2007-09-17 12:30:59 -07006820 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6821 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6822 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6823
Jeff Kirsher69e3fd82008-04-02 13:48:18 -07006824 err = ei->get_variants(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006825 if (err)
6826 goto err_hw_init;
6827
Bruce Allan4a770352008-10-01 17:18:35 -07006828 if ((adapter->flags & FLAG_IS_ICH) &&
6829 (adapter->flags & FLAG_READ_ONLY_NVM))
6830 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6831
Auke Kokbc7f75f2007-09-17 12:30:59 -07006832 hw->mac.ops.get_bus_info(&adapter->hw);
6833
Jeff Kirsher318a94d2008-03-28 09:15:16 -07006834 adapter->hw.phy.autoneg_wait_to_complete = 0;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006835
6836 /* Copper options */
Jeff Kirsher318a94d2008-03-28 09:15:16 -07006837 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07006838 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6839 adapter->hw.phy.disable_polarity_correction = 0;
6840 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6841 }
6842
Bruce Allan470a5422012-05-26 06:08:48 +00006843 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
Bruce Allan185095f2012-06-07 02:23:37 +00006844 dev_info(&pdev->dev,
6845 "PHY reset is blocked due to SOL/IDER session.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07006846
Bruce Allandc221292011-08-19 03:23:48 +00006847 /* Set initial default active device features */
6848 netdev->features = (NETIF_F_SG |
Patrick McHardyf6469682013-04-19 02:04:27 +00006849 NETIF_F_HW_VLAN_CTAG_RX |
6850 NETIF_F_HW_VLAN_CTAG_TX |
Bruce Allandc221292011-08-19 03:23:48 +00006851 NETIF_F_TSO |
6852 NETIF_F_TSO6 |
Bruce Allan70495a52012-01-11 01:26:50 +00006853 NETIF_F_RXHASH |
Bruce Allandc221292011-08-19 03:23:48 +00006854 NETIF_F_RXCSUM |
6855 NETIF_F_HW_CSUM);
6856
6857 /* Set user-changeable features (subset of all device features) */
6858 netdev->hw_features = netdev->features;
Ben Greear01840392012-02-11 15:39:25 +00006859 netdev->hw_features |= NETIF_F_RXFCS;
Ben Greear943146d2012-02-11 15:39:40 +00006860 netdev->priv_flags |= IFF_SUPP_NOFCS;
Ben Greearcf955e62012-02-11 15:39:51 +00006861 netdev->hw_features |= NETIF_F_RXALL;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006862
6863 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
Patrick McHardyf6469682013-04-19 02:04:27 +00006864 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006865
Bruce Allandc221292011-08-19 03:23:48 +00006866 netdev->vlan_features |= (NETIF_F_SG |
6867 NETIF_F_TSO |
6868 NETIF_F_TSO6 |
6869 NETIF_F_HW_CSUM);
Jeff Kirshera5136e22008-06-05 04:07:28 -07006870
Jesse Brandeburgef9b9652011-11-04 05:47:06 +00006871 netdev->priv_flags |= IFF_UNICAST_FLT;
6872
Yi Zou7b872a52010-09-22 17:57:58 +00006873 if (pci_using_dac) {
Auke Kokbc7f75f2007-09-17 12:30:59 -07006874 netdev->features |= NETIF_F_HIGHDMA;
Yi Zou7b872a52010-09-22 17:57:58 +00006875 netdev->vlan_features |= NETIF_F_HIGHDMA;
6876 }
Auke Kokbc7f75f2007-09-17 12:30:59 -07006877
Auke Kokbc7f75f2007-09-17 12:30:59 -07006878 if (e1000e_enable_mng_pass_thru(&adapter->hw))
6879 adapter->flags |= FLAG_MNG_PT_ENABLED;
6880
Bruce Allane921eb12012-11-28 09:28:37 +00006881 /* before reading the NVM, reset the controller to
Bruce Allanad680762008-03-28 09:15:03 -07006882 * put the device in a known good starting state
6883 */
Auke Kokbc7f75f2007-09-17 12:30:59 -07006884 adapter->hw.mac.ops.reset_hw(&adapter->hw);
6885
Bruce Allane921eb12012-11-28 09:28:37 +00006886 /* systems with ASPM and others may see the checksum fail on the first
Auke Kokbc7f75f2007-09-17 12:30:59 -07006887 * attempt. Let's give it a few tries
6888 */
6889 for (i = 0;; i++) {
6890 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6891 break;
6892 if (i == 2) {
Bruce Allan185095f2012-06-07 02:23:37 +00006893 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07006894 err = -EIO;
6895 goto err_eeprom;
6896 }
6897 }
6898
Auke Kok10aa4c02008-08-04 17:21:20 -07006899 e1000_eeprom_checks(adapter);
6900
Bruce Allan608f8a02010-01-13 02:04:58 +00006901 /* copy the MAC address */
Auke Kokbc7f75f2007-09-17 12:30:59 -07006902 if (e1000e_read_mac_addr(&adapter->hw))
Bruce Allan185095f2012-06-07 02:23:37 +00006903 dev_err(&pdev->dev,
6904 "NVM Read Error while reading MAC address\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07006905
6906 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006907
Jiri Pirkoaaeb6cd2013-01-08 01:38:26 +00006908 if (!is_valid_ether_addr(netdev->dev_addr)) {
Bruce Allan185095f2012-06-07 02:23:37 +00006909 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
Jiri Pirkoaaeb6cd2013-01-08 01:38:26 +00006910 netdev->dev_addr);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006911 err = -EIO;
6912 goto err_eeprom;
6913 }
6914
6915 init_timer(&adapter->watchdog_timer);
Joe Perchesc061b182010-08-23 18:20:03 +00006916 adapter->watchdog_timer.function = e1000_watchdog;
Bruce Allan53aa82d2013-02-20 04:06:06 +00006917 adapter->watchdog_timer.data = (unsigned long)adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006918
6919 init_timer(&adapter->phy_info_timer);
Joe Perchesc061b182010-08-23 18:20:03 +00006920 adapter->phy_info_timer.function = e1000_update_phy_info;
Bruce Allan53aa82d2013-02-20 04:06:06 +00006921 adapter->phy_info_timer.data = (unsigned long)adapter;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006922
6923 INIT_WORK(&adapter->reset_task, e1000_reset_task);
6924 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
Jesse Brandeburga8f88ff2008-10-02 16:33:25 -07006925 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6926 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
Bruce Allan41cec6f2009-11-20 23:28:56 +00006927 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006928
Auke Kokbc7f75f2007-09-17 12:30:59 -07006929 /* Initialize link parameters. User can change them with ethtool */
6930 adapter->hw.mac.autoneg = 1;
Rusty Russell3db1cd52011-12-19 13:56:45 +00006931 adapter->fc_autoneg = true;
Bruce Allan5c48ef3e22008-11-21 16:57:36 -08006932 adapter->hw.fc.requested_mode = e1000_fc_default;
6933 adapter->hw.fc.current_mode = e1000_fc_default;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006934 adapter->hw.phy.autoneg_advertised = 0x2f;
6935
Bruce Allane921eb12012-11-28 09:28:37 +00006936 /* Initial Wake on LAN setting - If APM wake is enabled in
Auke Kokbc7f75f2007-09-17 12:30:59 -07006937 * the EEPROM, enable the ACPI Magic Packet filter
6938 */
6939 if (adapter->flags & FLAG_APME_IN_WUC) {
6940 /* APME bit in EEPROM is mapped to WUC.APME */
6941 eeprom_data = er32(WUC);
6942 eeprom_apme_mask = E1000_WUC_APME;
Bruce Allan4def99b2011-02-02 09:30:36 +00006943 if ((hw->mac.type > e1000_ich10lan) &&
6944 (eeprom_data & E1000_WUC_PHY_WAKE))
Bruce Allana4f58f52009-06-02 11:29:18 +00006945 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
Auke Kokbc7f75f2007-09-17 12:30:59 -07006946 } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6947 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6948 (adapter->hw.bus.func == 1))
David Ertman491a04d2014-07-09 16:07:42 +00006949 rval = e1000_read_nvm(&adapter->hw,
6950 NVM_INIT_CONTROL3_PORT_B,
6951 1, &eeprom_data);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006952 else
David Ertman491a04d2014-07-09 16:07:42 +00006953 rval = e1000_read_nvm(&adapter->hw,
6954 NVM_INIT_CONTROL3_PORT_A,
6955 1, &eeprom_data);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006956 }
6957
6958 /* fetch WoL from EEPROM */
David Ertman491a04d2014-07-09 16:07:42 +00006959 if (rval)
6960 e_dbg("NVM read error getting WoL initial values: %d\n", rval);
6961 else if (eeprom_data & eeprom_apme_mask)
Auke Kokbc7f75f2007-09-17 12:30:59 -07006962 adapter->eeprom_wol |= E1000_WUFC_MAG;
6963
Bruce Allane921eb12012-11-28 09:28:37 +00006964 /* now that we have the eeprom settings, apply the special cases
Auke Kokbc7f75f2007-09-17 12:30:59 -07006965 * where the eeprom may be wrong or the board simply won't support
6966 * wake on lan on a particular port
6967 */
6968 if (!(adapter->flags & FLAG_HAS_WOL))
6969 adapter->eeprom_wol = 0;
6970
6971 /* initialize the wol settings based on the eeprom settings */
6972 adapter->wol = adapter->eeprom_wol;
Konstantin Khlebnikov66148ba2013-03-05 09:43:04 +00006973
6974 /* make sure adapter isn't asleep if manageability is enabled */
6975 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) ||
6976 (hw->mac.ops.check_mng_mode(hw)))
6977 device_wakeup_enable(&pdev->dev);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006978
Bruce Allan84527592008-11-21 17:00:22 -08006979 /* save off EEPROM version number */
David Ertman491a04d2014-07-09 16:07:42 +00006980 rval = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6981
6982 if (rval) {
6983 e_dbg("NVM read error getting EEPROM version: %d\n", rval);
6984 adapter->eeprom_vers = 0;
6985 }
Bruce Allan84527592008-11-21 17:00:22 -08006986
Auke Kokbc7f75f2007-09-17 12:30:59 -07006987 /* reset the hardware with the new settings */
6988 e1000e_reset(adapter);
6989
Bruce Allane921eb12012-11-28 09:28:37 +00006990 /* If the controller has AMT, do not set DRV_LOAD until the interface
Auke Kokbc7f75f2007-09-17 12:30:59 -07006991 * is up. For all other cases, let the f/w know that the h/w is now
Bruce Allanad680762008-03-28 09:15:03 -07006992 * under the control of the driver.
6993 */
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07006994 if (!(adapter->flags & FLAG_HAS_AMT))
Bruce Allan31dbe5b2011-01-06 14:29:52 +00006995 e1000e_get_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07006996
Bruce Allanf2315bf2011-12-16 00:46:59 +00006997 strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
Auke Kokbc7f75f2007-09-17 12:30:59 -07006998 err = register_netdev(netdev);
6999 if (err)
7000 goto err_register;
7001
Jesse Brandeburg9c563d22009-04-17 20:44:34 +00007002 /* carrier off reporting is important to ethtool even BEFORE open */
7003 netif_carrier_off(netdev);
7004
Bruce Alland89777b2013-01-19 01:09:58 +00007005 /* init PTP hardware clock */
7006 e1000e_ptp_init(adapter);
7007
Auke Kokbc7f75f2007-09-17 12:30:59 -07007008 e1000_print_device_info(adapter);
7009
Alan Sternf3ec4f82010-06-08 15:23:51 -04007010 if (pci_dev_run_wake(pdev))
7011 pm_runtime_put_noidle(&pdev->dev);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007012
Auke Kokbc7f75f2007-09-17 12:30:59 -07007013 return 0;
7014
7015err_register:
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07007016 if (!(adapter->flags & FLAG_HAS_AMT))
Bruce Allan31dbe5b2011-01-06 14:29:52 +00007017 e1000e_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007018err_eeprom:
Bruce Allan470a5422012-05-26 06:08:48 +00007019 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
Auke Kokbc7f75f2007-09-17 12:30:59 -07007020 e1000_phy_hw_reset(&adapter->hw);
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07007021err_hw_init:
Auke Kokbc7f75f2007-09-17 12:30:59 -07007022 kfree(adapter->tx_ring);
7023 kfree(adapter->rx_ring);
7024err_sw_init:
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07007025 if (adapter->hw.flash_address)
7026 iounmap(adapter->hw.flash_address);
Jeff Kirshere82f54b2008-11-14 06:45:07 +00007027 e1000e_reset_interrupt_capability(adapter);
Jesse Brandeburgc43bc57e2008-08-04 17:21:40 -07007028err_flashmap:
Auke Kokbc7f75f2007-09-17 12:30:59 -07007029 iounmap(adapter->hw.hw_addr);
7030err_ioremap:
7031 free_netdev(netdev);
7032err_alloc_etherdev:
Bruce Allanf0f422e2008-08-04 17:21:53 -07007033 pci_release_selected_regions(pdev,
Bruce Allanf0ff4392013-02-20 04:05:39 +00007034 pci_select_bars(pdev, IORESOURCE_MEM));
Auke Kokbc7f75f2007-09-17 12:30:59 -07007035err_pci_reg:
7036err_dma:
7037 pci_disable_device(pdev);
7038 return err;
7039}
7040
7041/**
7042 * e1000_remove - Device Removal Routine
7043 * @pdev: PCI device information struct
7044 *
7045 * e1000_remove is called by the PCI subsystem to alert the driver
7046 * that it should release a PCI device. The could be caused by a
7047 * Hot-Plug event, or because the driver is going to be removed from
7048 * memory.
7049 **/
Bill Pemberton9f9a12f2012-12-03 09:24:25 -05007050static void e1000_remove(struct pci_dev *pdev)
Auke Kokbc7f75f2007-09-17 12:30:59 -07007051{
7052 struct net_device *netdev = pci_get_drvdata(pdev);
7053 struct e1000_adapter *adapter = netdev_priv(netdev);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007054 bool down = test_bit(__E1000_DOWN, &adapter->state);
7055
Bruce Alland89777b2013-01-19 01:09:58 +00007056 e1000e_ptp_remove(adapter);
7057
Bruce Allane921eb12012-11-28 09:28:37 +00007058 /* The timers may be rescheduled, so explicitly disable them
Tejun Heo23f333a2010-12-12 16:45:14 +01007059 * from being rescheduled.
Bruce Allanad680762008-03-28 09:15:03 -07007060 */
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007061 if (!down)
7062 set_bit(__E1000_DOWN, &adapter->state);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007063 del_timer_sync(&adapter->watchdog_timer);
7064 del_timer_sync(&adapter->phy_info_timer);
7065
Bruce Allan41cec6f2009-11-20 23:28:56 +00007066 cancel_work_sync(&adapter->reset_task);
7067 cancel_work_sync(&adapter->watchdog_task);
7068 cancel_work_sync(&adapter->downshift_task);
7069 cancel_work_sync(&adapter->update_phy_task);
7070 cancel_work_sync(&adapter->print_hang_task);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007071
Bruce Allanb67e1912012-12-27 08:32:33 +00007072 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
7073 cancel_work_sync(&adapter->tx_hwtstamp_work);
7074 if (adapter->tx_hwtstamp_skb) {
7075 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
7076 adapter->tx_hwtstamp_skb = NULL;
7077 }
7078 }
7079
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007080 /* Don't lie to e1000_close() down the road. */
7081 if (!down)
7082 clear_bit(__E1000_DOWN, &adapter->state);
Bruce Allan17f208d2009-12-01 15:47:22 +00007083 unregister_netdev(netdev);
7084
Alan Sternf3ec4f82010-06-08 15:23:51 -04007085 if (pci_dev_run_wake(pdev))
7086 pm_runtime_get_noresume(&pdev->dev);
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007087
Bruce Allane921eb12012-11-28 09:28:37 +00007088 /* Release control of h/w to f/w. If f/w is AMT enabled, this
Bruce Allanad680762008-03-28 09:15:03 -07007089 * would have already happened in close and is redundant.
7090 */
Bruce Allan31dbe5b2011-01-06 14:29:52 +00007091 e1000e_release_hw_control(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007092
Bruce Allan4662e822008-08-26 18:37:06 -07007093 e1000e_reset_interrupt_capability(adapter);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007094 kfree(adapter->tx_ring);
7095 kfree(adapter->rx_ring);
7096
7097 iounmap(adapter->hw.hw_addr);
7098 if (adapter->hw.flash_address)
7099 iounmap(adapter->hw.flash_address);
Bruce Allanf0f422e2008-08-04 17:21:53 -07007100 pci_release_selected_regions(pdev,
Bruce Allanf0ff4392013-02-20 04:05:39 +00007101 pci_select_bars(pdev, IORESOURCE_MEM));
Auke Kokbc7f75f2007-09-17 12:30:59 -07007102
7103 free_netdev(netdev);
7104
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00007105 /* AER disable */
Frans Pop19d5afd2009-10-02 10:04:12 -07007106 pci_disable_pcie_error_reporting(pdev);
Jesse Brandeburg111b9dc2009-02-10 12:51:20 +00007107
Auke Kokbc7f75f2007-09-17 12:30:59 -07007108 pci_disable_device(pdev);
7109}
7110
7111/* PCI Error Recovery (ERS) */
Stephen Hemminger3646f0e2012-09-07 09:33:15 -07007112static const struct pci_error_handlers e1000_err_handler = {
Auke Kokbc7f75f2007-09-17 12:30:59 -07007113 .error_detected = e1000_io_error_detected,
7114 .slot_reset = e1000_io_slot_reset,
7115 .resume = e1000_io_resume,
7116};
7117
David Ertman0e8e8422014-04-08 22:10:31 +00007118static const struct pci_device_id e1000_pci_tbl[] = {
Auke Kokbc7f75f2007-09-17 12:30:59 -07007119 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
7120 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
7121 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
Bruce Allanc29c3ba2013-02-20 04:05:50 +00007122 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP),
7123 board_82571 },
Auke Kokbc7f75f2007-09-17 12:30:59 -07007124 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
7125 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
Auke Kok040babf2007-10-31 15:22:05 -07007126 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
7127 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
7128 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
Bruce Allanad680762008-03-28 09:15:03 -07007129
Auke Kokbc7f75f2007-09-17 12:30:59 -07007130 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
7131 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
7132 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
7133 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
Bruce Allanad680762008-03-28 09:15:03 -07007134
Auke Kokbc7f75f2007-09-17 12:30:59 -07007135 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
7136 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
7137 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
Bruce Allanad680762008-03-28 09:15:03 -07007138
Bruce Allan4662e822008-08-26 18:37:06 -07007139 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
Bruce Allanbef28b12009-03-24 23:28:02 -07007140 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
Alexander Duyck8c81c9c2009-03-19 01:12:27 +00007141 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
Bruce Allan4662e822008-08-26 18:37:06 -07007142
Auke Kokbc7f75f2007-09-17 12:30:59 -07007143 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
7144 board_80003es2lan },
7145 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
7146 board_80003es2lan },
7147 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
7148 board_80003es2lan },
7149 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
7150 board_80003es2lan },
Bruce Allanad680762008-03-28 09:15:03 -07007151
Auke Kokbc7f75f2007-09-17 12:30:59 -07007152 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
7153 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
7154 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
7155 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
7156 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
7157 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
7158 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
Bruce Allan9e135a22009-12-01 15:50:31 +00007159 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
Bruce Allanad680762008-03-28 09:15:03 -07007160
Auke Kokbc7f75f2007-09-17 12:30:59 -07007161 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
7162 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
7163 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
7164 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
7165 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
Bruce Allan2f15f9d2008-08-26 18:36:36 -07007166 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
Bruce Allan97ac8ca2008-04-29 09:16:05 -07007167 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
7168 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
7169 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
7170
7171 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
7172 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
7173 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
Auke Kokbc7f75f2007-09-17 12:30:59 -07007174
Bruce Allanf4187b52008-08-26 18:36:50 -07007175 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
7176 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
Bruce Allan10df0b92010-05-10 15:02:52 +00007177 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
Bruce Allanf4187b52008-08-26 18:36:50 -07007178
Bruce Allana4f58f52009-06-02 11:29:18 +00007179 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
7180 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
7181 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
7182 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
7183
Bruce Alland3738bb2010-06-16 13:27:28 +00007184 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
7185 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
7186
Bruce Allan2fbe4522012-04-19 03:21:47 +00007187 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
7188 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
Bruce Allan16e310a2012-10-09 01:11:26 +00007189 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt },
7190 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt },
Bruce Allan91a3d822013-06-29 01:15:16 +00007191 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt },
7192 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt },
7193 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt },
7194 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt },
Bruce Allan2fbe4522012-04-19 03:21:47 +00007195
Bruce Allanf36bb6c2012-01-31 06:38:04 +00007196 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
Auke Kokbc7f75f2007-09-17 12:30:59 -07007197};
7198MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
7199
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007200static const struct dev_pm_ops e1000_pm_ops = {
Kevin Hao72f72dc2014-03-18 00:26:49 -07007201#ifdef CONFIG_PM_SLEEP
David Ertman28002092014-02-14 07:16:41 +00007202 .suspend = e1000e_pm_suspend,
7203 .resume = e1000e_pm_resume,
7204 .freeze = e1000e_pm_freeze,
7205 .thaw = e1000e_pm_thaw,
7206 .poweroff = e1000e_pm_suspend,
7207 .restore = e1000e_pm_resume,
Kevin Hao72f72dc2014-03-18 00:26:49 -07007208#endif
David Ertman63eb48f2014-02-14 07:16:46 +00007209 SET_RUNTIME_PM_OPS(e1000e_pm_runtime_suspend, e1000e_pm_runtime_resume,
7210 e1000e_pm_runtime_idle)
Rafael J. Wysocki23606cf2010-03-14 14:35:17 +00007211};
7212
Auke Kokbc7f75f2007-09-17 12:30:59 -07007213/* PCI Device API Driver */
7214static struct pci_driver e1000_driver = {
7215 .name = e1000e_driver_name,
7216 .id_table = e1000_pci_tbl,
7217 .probe = e1000_probe,
Bill Pemberton9f9a12f2012-12-03 09:24:25 -05007218 .remove = e1000_remove,
Bruce Allanf36bb6c2012-01-31 06:38:04 +00007219 .driver = {
7220 .pm = &e1000_pm_ops,
7221 },
Auke Kokbc7f75f2007-09-17 12:30:59 -07007222 .shutdown = e1000_shutdown,
7223 .err_handler = &e1000_err_handler
7224};
7225
7226/**
7227 * e1000_init_module - Driver Registration Routine
7228 *
7229 * e1000_init_module is the first routine called when the driver is
7230 * loaded. All it does is register with the PCI subsystem.
7231 **/
7232static int __init e1000_init_module(void)
7233{
7234 int ret;
David Ertman6cf08d12014-04-05 06:07:00 +00007235
Bruce Allan8544b9f2010-03-24 12:55:30 +00007236 pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
7237 e1000e_driver_version);
David Ertmane78b80b2014-02-04 01:56:06 +00007238 pr_info("Copyright(c) 1999 - 2014 Intel Corporation.\n");
Auke Kokbc7f75f2007-09-17 12:30:59 -07007239 ret = pci_register_driver(&e1000_driver);
Bruce Allan53ec5492009-11-20 23:27:40 +00007240
Auke Kokbc7f75f2007-09-17 12:30:59 -07007241 return ret;
7242}
7243module_init(e1000_init_module);
7244
7245/**
7246 * e1000_exit_module - Driver Exit Cleanup Routine
7247 *
7248 * e1000_exit_module is called just before the driver is removed
7249 * from memory.
7250 **/
7251static void __exit e1000_exit_module(void)
7252{
7253 pci_unregister_driver(&e1000_driver);
Auke Kokbc7f75f2007-09-17 12:30:59 -07007254}
7255module_exit(e1000_exit_module);
7256
Auke Kokbc7f75f2007-09-17 12:30:59 -07007257MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
7258MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
7259MODULE_LICENSE("GPL");
7260MODULE_VERSION(DRV_VERSION);
7261
Bruce Allan06c24b92012-02-23 03:13:13 +00007262/* netdev.c */