blob: 230da14b1b682f44c87fab30b52c2ad0033b5c51 [file] [log] [blame]
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001/*
Kou Ishizaki3342cf0e2007-02-20 16:36:14 -06002 * Network device driver for Cell Processor-Based Blade and Celleb platform
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07003 *
4 * (C) Copyright IBM Corp. 2005
Kou Ishizaki3342cf0e2007-02-20 16:36:14 -06005 * (C) Copyright 2006 TOSHIBA CORPORATION
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07006 *
7 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
8 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070025#include <linux/compiler.h>
26#include <linux/crc32.h>
27#include <linux/delay.h>
28#include <linux/etherdevice.h>
29#include <linux/ethtool.h>
30#include <linux/firmware.h>
31#include <linux/if_vlan.h>
Arnd Bergmann7c5c2202006-01-12 17:16:45 -050032#include <linux/in.h>
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070033#include <linux/init.h>
34#include <linux/ioport.h>
35#include <linux/ip.h>
36#include <linux/kernel.h>
37#include <linux/mii.h>
38#include <linux/module.h>
39#include <linux/netdevice.h>
40#include <linux/device.h>
41#include <linux/pci.h>
42#include <linux/skbuff.h>
43#include <linux/slab.h>
44#include <linux/tcp.h>
45#include <linux/types.h>
Arnd Bergmann11f1a522006-01-12 17:16:44 -050046#include <linux/vmalloc.h>
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070047#include <linux/wait.h>
48#include <linux/workqueue.h>
49#include <asm/bitops.h>
50#include <asm/pci-bridge.h>
51#include <net/checksum.h>
52
53#include "spider_net.h"
54
55MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
56 "<Jens.Osterkamp@de.ibm.com>");
57MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
58MODULE_LICENSE("GPL");
Linas Vepstas90f10842006-10-10 15:56:04 -050059MODULE_VERSION(VERSION);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070060
61static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
62static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
63
Linas Vepstase2874f22006-10-10 15:59:02 -050064module_param(rx_descriptors, int, 0444);
65module_param(tx_descriptors, int, 0444);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070066
67MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
68 "in rx chains");
69MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
70 "in tx chain");
71
72char spider_net_driver_name[] = "spidernet";
73
74static struct pci_device_id spider_net_pci_tbl[] = {
75 { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
76 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
77 { 0, }
78};
79
80MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
81
82/**
83 * spider_net_read_reg - reads an SMMIO register of a card
84 * @card: device structure
85 * @reg: register to read from
86 *
87 * returns the content of the specified SMMIO register.
88 */
Jens Osterkampbdd01502006-07-13 11:54:08 +020089static inline u32
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070090spider_net_read_reg(struct spider_net_card *card, u32 reg)
91{
Benjamin Herrenschmidt3bc0f402006-11-11 17:25:13 +110092 /* We use the powerpc specific variants instead of readl_be() because
93 * we know spidernet is not a real PCI device and we can thus avoid the
94 * performance hit caused by the PCI workarounds.
95 */
96 return in_be32(card->regs + reg);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -070097}
98
99/**
100 * spider_net_write_reg - writes to an SMMIO register of a card
101 * @card: device structure
102 * @reg: register to write to
103 * @value: value to write into the specified SMMIO register
104 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200105static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700106spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
107{
Benjamin Herrenschmidt3bc0f402006-11-11 17:25:13 +1100108 /* We use the powerpc specific variants instead of writel_be() because
109 * we know spidernet is not a real PCI device and we can thus avoid the
110 * performance hit caused by the PCI workarounds.
111 */
112 out_be32(card->regs + reg, value);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700113}
114
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700115/** spider_net_write_phy - write to phy register
116 * @netdev: adapter to be written to
117 * @mii_id: id of MII
118 * @reg: PHY register
119 * @val: value to be written to phy register
120 *
121 * spider_net_write_phy_register writes to an arbitrary PHY
122 * register via the spider GPCWOPCMD register. We assume the queue does
123 * not run full (not more than 15 commands outstanding).
124 **/
125static void
126spider_net_write_phy(struct net_device *netdev, int mii_id,
127 int reg, int val)
128{
129 struct spider_net_card *card = netdev_priv(netdev);
130 u32 writevalue;
131
132 writevalue = ((u32)mii_id << 21) |
133 ((u32)reg << 16) | ((u32)val);
134
135 spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
136}
137
138/** spider_net_read_phy - read from phy register
139 * @netdev: network device to be read from
140 * @mii_id: id of MII
141 * @reg: PHY register
142 *
143 * Returns value read from PHY register
144 *
145 * spider_net_write_phy reads from an arbitrary PHY
146 * register via the spider GPCROPCMD register
147 **/
148static int
149spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
150{
151 struct spider_net_card *card = netdev_priv(netdev);
152 u32 readvalue;
153
154 readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
155 spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
156
157 /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
158 * interrupt, as we poll for the completion of the read operation
159 * in spider_net_read_phy. Should take about 50 us */
160 do {
161 readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
162 } while (readvalue & SPIDER_NET_GPREXEC);
163
164 readvalue &= SPIDER_NET_GPRDAT_MASK;
165
166 return readvalue;
167}
168
169/**
Kou Ishizakiabdb66b2007-02-20 16:33:41 -0600170 * spider_net_setup_aneg - initial auto-negotiation setup
171 * @card: device structure
172 **/
173static void
174spider_net_setup_aneg(struct spider_net_card *card)
175{
176 struct mii_phy *phy = &card->phy;
177 u32 advertise = 0;
178 u16 bmcr, bmsr, stat1000, estat;
179
180 bmcr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMCR);
181 bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
182 stat1000 = spider_net_read_phy(card->netdev, phy->mii_id, MII_STAT1000);
183 estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
184
185 if (bmsr & BMSR_10HALF)
186 advertise |= ADVERTISED_10baseT_Half;
187 if (bmsr & BMSR_10FULL)
188 advertise |= ADVERTISED_10baseT_Full;
189 if (bmsr & BMSR_100HALF)
190 advertise |= ADVERTISED_100baseT_Half;
191 if (bmsr & BMSR_100FULL)
192 advertise |= ADVERTISED_100baseT_Full;
193
194 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
195 advertise |= SUPPORTED_1000baseT_Full;
196 if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
197 advertise |= SUPPORTED_1000baseT_Half;
198
199 mii_phy_probe(phy, phy->mii_id);
200 phy->def->ops->setup_aneg(phy, advertise);
201
202}
203
204/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500205 * spider_net_rx_irq_off - switch off rx irq on this spider card
206 * @card: device structure
207 *
208 * switches off rx irq by masking them out in the GHIINTnMSK register
209 */
210static void
211spider_net_rx_irq_off(struct spider_net_card *card)
212{
213 u32 regvalue;
214
215 regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
216 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
217}
218
219/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700220 * spider_net_rx_irq_on - switch on rx irq on this spider card
221 * @card: device structure
222 *
223 * switches on rx irq by enabling them in the GHIINTnMSK register
224 */
225static void
226spider_net_rx_irq_on(struct spider_net_card *card)
227{
228 u32 regvalue;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700229
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500230 regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
231 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700232}
233
234/**
235 * spider_net_set_promisc - sets the unicast address or the promiscuous mode
236 * @card: card structure
237 *
238 * spider_net_set_promisc sets the unicast destination address filter and
239 * thus either allows for non-promisc mode or promisc mode
240 */
241static void
242spider_net_set_promisc(struct spider_net_card *card)
243{
244 u32 macu, macl;
245 struct net_device *netdev = card->netdev;
246
247 if (netdev->flags & IFF_PROMISC) {
248 /* clear destination entry 0 */
249 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
250 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
251 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
252 SPIDER_NET_PROMISC_VALUE);
253 } else {
254 macu = netdev->dev_addr[0];
255 macu <<= 8;
256 macu |= netdev->dev_addr[1];
257 memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
258
259 macu |= SPIDER_NET_UA_DESCR_VALUE;
260 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
261 spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
262 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
263 SPIDER_NET_NONPROMISC_VALUE);
264 }
265}
266
267/**
268 * spider_net_get_mac_address - read mac address from spider card
269 * @card: device structure
270 *
271 * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
272 */
273static int
274spider_net_get_mac_address(struct net_device *netdev)
275{
276 struct spider_net_card *card = netdev_priv(netdev);
277 u32 macl, macu;
278
279 macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
280 macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
281
282 netdev->dev_addr[0] = (macu >> 24) & 0xff;
283 netdev->dev_addr[1] = (macu >> 16) & 0xff;
284 netdev->dev_addr[2] = (macu >> 8) & 0xff;
285 netdev->dev_addr[3] = macu & 0xff;
286 netdev->dev_addr[4] = (macl >> 8) & 0xff;
287 netdev->dev_addr[5] = macl & 0xff;
288
289 if (!is_valid_ether_addr(&netdev->dev_addr[0]))
290 return -EINVAL;
291
292 return 0;
293}
294
295/**
296 * spider_net_get_descr_status -- returns the status of a descriptor
297 * @descr: descriptor to look at
298 *
299 * returns the status as in the dmac_cmd_status field of the descriptor
300 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200301static inline int
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600302spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700303{
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600304 return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700305}
306
307/**
308 * spider_net_free_chain - free descriptor chain
309 * @card: card structure
310 * @chain: address of chain
311 *
312 */
313static void
314spider_net_free_chain(struct spider_net_card *card,
315 struct spider_net_descr_chain *chain)
316{
317 struct spider_net_descr *descr;
318
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600319 descr = chain->ring;
320 do {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700321 descr->bus_addr = 0;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600322 descr->hwdescr->next_descr_addr = 0;
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600323 descr = descr->next;
324 } while (descr != chain->ring);
325
326 dma_free_coherent(&card->pdev->dev, chain->num_desc,
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600327 chain->hwring, chain->dma_addr);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700328}
329
330/**
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600331 * spider_net_init_chain - alloc and link descriptor chain
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700332 * @card: card structure
333 * @chain: address of chain
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700334 *
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600335 * We manage a circular list that mirrors the hardware structure,
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700336 * except that the hardware uses bus addresses.
337 *
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600338 * Returns 0 on success, <0 on failure
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700339 */
340static int
341spider_net_init_chain(struct spider_net_card *card,
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600342 struct spider_net_descr_chain *chain)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700343{
344 int i;
345 struct spider_net_descr *descr;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600346 struct spider_net_hw_descr *hwdescr;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500347 dma_addr_t buf;
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600348 size_t alloc_size;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700349
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600350 alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700351
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600352 chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600353 &chain->dma_addr, GFP_KERNEL);
354
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600355 if (!chain->hwring)
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600356 return -ENOMEM;
357
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600358 memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600359
360 /* Set up the hardware pointers in each descriptor */
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600361 descr = chain->ring;
362 hwdescr = chain->hwring;
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600363 buf = chain->dma_addr;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600364 for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
365 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
366 hwdescr->next_descr_addr = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700367
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600368 descr->hwdescr = hwdescr;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500369 descr->bus_addr = buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700370 descr->next = descr + 1;
371 descr->prev = descr - 1;
372
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600373 buf += sizeof(struct spider_net_hw_descr);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700374 }
375 /* do actual circular list */
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600376 (descr-1)->next = chain->ring;
377 chain->ring->prev = descr-1;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700378
Jens Osterkampbdd01502006-07-13 11:54:08 +0200379 spin_lock_init(&chain->lock);
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600380 chain->head = chain->ring;
381 chain->tail = chain->ring;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700382 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700383}
384
385/**
386 * spider_net_free_rx_chain_contents - frees descr contents in rx chain
387 * @card: card structure
388 *
389 * returns 0 on success, <0 on failure
390 */
391static void
392spider_net_free_rx_chain_contents(struct spider_net_card *card)
393{
394 struct spider_net_descr *descr;
395
396 descr = card->rx_chain.head;
Linas Vepstas64751912006-10-10 16:22:29 -0500397 do {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700398 if (descr->skb) {
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600399 pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500400 SPIDER_NET_MAX_FRAME,
Linas Vepstas348bc2a2006-10-10 16:21:10 -0500401 PCI_DMA_BIDIRECTIONAL);
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600402 dev_kfree_skb(descr->skb);
403 descr->skb = NULL;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700404 }
405 descr = descr->next;
Linas Vepstas64751912006-10-10 16:22:29 -0500406 } while (descr != card->rx_chain.head);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700407}
408
409/**
Linas Vepstasa4182c52006-12-13 15:19:54 -0600410 * spider_net_prepare_rx_descr - Reinitialize RX descriptor
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700411 * @card: card structure
412 * @descr: descriptor to re-init
413 *
Linas Vepstasa4182c52006-12-13 15:19:54 -0600414 * Return 0 on succes, <0 on failure.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700415 *
Linas Vepstasa4182c52006-12-13 15:19:54 -0600416 * Allocates a new rx skb, iommu-maps it and attaches it to the
417 * descriptor. Mark the descriptor as activated, ready-to-use.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700418 */
419static int
420spider_net_prepare_rx_descr(struct spider_net_card *card,
421 struct spider_net_descr *descr)
422{
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600423 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500424 dma_addr_t buf;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700425 int offset;
426 int bufsize;
427
428 /* we need to round up the buffer size to a multiple of 128 */
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500429 bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700430 (~(SPIDER_NET_RXBUF_ALIGN - 1));
431
432 /* and we need to have it 128 byte aligned, therefore we allocate a
433 * bit more */
434 /* allocate an skb */
435 descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
436 if (!descr->skb) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500437 if (netif_msg_rx_err(card) && net_ratelimit())
438 pr_err("Not enough memory to allocate rx buffer\n");
Jim Lewis9b6b0b82006-09-22 17:22:53 -0700439 card->spider_stats.alloc_rx_skb_error++;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700440 return -ENOMEM;
441 }
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600442 hwdescr->buf_size = bufsize;
443 hwdescr->result_size = 0;
444 hwdescr->valid_size = 0;
445 hwdescr->data_status = 0;
446 hwdescr->data_error = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700447
448 offset = ((unsigned long)descr->skb->data) &
449 (SPIDER_NET_RXBUF_ALIGN - 1);
450 if (offset)
451 skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
Linas Vepstasa4182c52006-12-13 15:19:54 -0600452 /* iommu-map the skb */
Arnd Bergmann8e0a6132006-01-12 17:16:43 -0500453 buf = pci_map_single(card->pdev, descr->skb->data,
Jens Osterkampbdd01502006-07-13 11:54:08 +0200454 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
Olof Johanssond4b0a4c2006-09-27 14:02:26 -0500455 if (pci_dma_mapping_error(buf)) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700456 dev_kfree_skb_any(descr->skb);
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600457 descr->skb = NULL;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500458 if (netif_msg_rx_err(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700459 pr_err("Could not iommu-map rx buffer\n");
Jim Lewis9b6b0b82006-09-22 17:22:53 -0700460 card->spider_stats.rx_iommu_map_error++;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600461 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700462 } else {
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600463 hwdescr->buf_addr = buf;
464 hwdescr->next_descr_addr = 0;
Linas Vepstas90476a22006-12-13 15:22:04 -0600465 wmb();
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600466 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
Jens Osterkampbdd01502006-07-13 11:54:08 +0200467 SPIDER_NET_DMAC_NOINTR_COMPLETE;
Linas Vepstasd9a97202007-02-05 16:29:43 -0800468
469 wmb();
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600470 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700471 }
472
Linas Vepstasa4182c52006-12-13 15:19:54 -0600473 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700474}
475
476/**
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500477 * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700478 * @card: card structure
479 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500480 * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700481 * chip by writing to the appropriate register. DMA is enabled in
482 * spider_net_enable_rxdmac.
483 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200484static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700485spider_net_enable_rxchtails(struct spider_net_card *card)
486{
487 /* assume chain is aligned correctly */
488 spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
489 card->rx_chain.tail->bus_addr);
490}
491
492/**
493 * spider_net_enable_rxdmac - enables a receive DMA controller
494 * @card: card structure
495 *
496 * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
497 * in the GDADMACCNTR register
498 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200499static inline void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700500spider_net_enable_rxdmac(struct spider_net_card *card)
501{
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500502 wmb();
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700503 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
504 SPIDER_NET_DMA_RX_VALUE);
505}
506
507/**
508 * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
509 * @card: card structure
510 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500511 * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700512 */
513static void
514spider_net_refill_rx_chain(struct spider_net_card *card)
515{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200516 struct spider_net_descr_chain *chain = &card->rx_chain;
517 unsigned long flags;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700518
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500519 /* one context doing the refill (and a second context seeing that
520 * and omitting it) is ok. If called by NAPI, we'll be called again
521 * as spider_net_decode_one_descr is called several times. If some
522 * interrupt calls us, the NAPI is about to clean up anyway. */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200523 if (!spin_trylock_irqsave(&chain->lock, flags))
524 return;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700525
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600526 while (spider_net_get_descr_status(chain->head->hwdescr) ==
Jens Osterkampbdd01502006-07-13 11:54:08 +0200527 SPIDER_NET_DESCR_NOT_IN_USE) {
528 if (spider_net_prepare_rx_descr(card, chain->head))
529 break;
530 chain->head = chain->head->next;
531 }
532
533 spin_unlock_irqrestore(&chain->lock, flags);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700534}
535
536/**
Linas Vepstas2c307db2006-12-13 15:20:59 -0600537 * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700538 * @card: card structure
539 *
Linas Vepstas2c307db2006-12-13 15:20:59 -0600540 * Returns 0 on success, <0 on failure.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700541 */
542static int
543spider_net_alloc_rx_skbs(struct spider_net_card *card)
544{
545 int result;
546 struct spider_net_descr_chain *chain;
547
548 result = -ENOMEM;
549
550 chain = &card->rx_chain;
Linas Vepstas2c307db2006-12-13 15:20:59 -0600551 /* Put at least one buffer into the chain. if this fails,
552 * we've got a problem. If not, spider_net_refill_rx_chain
553 * will do the rest at the end of this function. */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700554 if (spider_net_prepare_rx_descr(card, chain->head))
555 goto error;
556 else
557 chain->head = chain->head->next;
558
Linas Vepstas2c307db2006-12-13 15:20:59 -0600559 /* This will allocate the rest of the rx buffers;
560 * if not, it's business as usual later on. */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700561 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500562 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700563 return 0;
564
565error:
566 spider_net_free_rx_chain_contents(card);
567 return result;
568}
569
570/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700571 * spider_net_get_multicast_hash - generates hash for multicast filter table
572 * @addr: multicast address
573 *
574 * returns the hash value.
575 *
576 * spider_net_get_multicast_hash calculates a hash value for a given multicast
577 * address, that is used to set the multicast filter tables
578 */
579static u8
580spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
581{
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700582 u32 crc;
583 u8 hash;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500584 char addr_for_crc[ETH_ALEN] = { 0, };
585 int i, bit;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700586
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500587 for (i = 0; i < ETH_ALEN * 8; i++) {
588 bit = (addr[i / 8] >> (i % 8)) & 1;
589 addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
590 }
591
592 crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700593
594 hash = (crc >> 27);
595 hash <<= 3;
596 hash |= crc & 7;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500597 hash &= 0xff;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700598
599 return hash;
600}
601
602/**
603 * spider_net_set_multi - sets multicast addresses and promisc flags
604 * @netdev: interface device structure
605 *
606 * spider_net_set_multi configures multicast addresses as needed for the
607 * netdev interface. It also sets up multicast, allmulti and promisc
608 * flags appropriately
609 */
610static void
611spider_net_set_multi(struct net_device *netdev)
612{
613 struct dev_mc_list *mc;
614 u8 hash;
615 int i;
616 u32 reg;
617 struct spider_net_card *card = netdev_priv(netdev);
618 unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
619 {0, };
620
621 spider_net_set_promisc(card);
622
623 if (netdev->flags & IFF_ALLMULTI) {
624 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
625 set_bit(i, bitmask);
626 }
627 goto write_hash;
628 }
629
630 /* well, we know, what the broadcast hash value is: it's xfd
631 hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
632 set_bit(0xfd, bitmask);
633
634 for (mc = netdev->mc_list; mc; mc = mc->next) {
635 hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
636 set_bit(hash, bitmask);
637 }
638
639write_hash:
640 for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
641 reg = 0;
642 if (test_bit(i * 4, bitmask))
643 reg += 0x08;
644 reg <<= 8;
645 if (test_bit(i * 4 + 1, bitmask))
646 reg += 0x08;
647 reg <<= 8;
648 if (test_bit(i * 4 + 2, bitmask))
649 reg += 0x08;
650 reg <<= 8;
651 if (test_bit(i * 4 + 3, bitmask))
652 reg += 0x08;
653
654 spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
655 }
656}
657
658/**
659 * spider_net_disable_rxdmac - disables the receive DMA controller
660 * @card: card structure
661 *
662 * spider_net_disable_rxdmac terminates processing on the DMA controller by
663 * turing off DMA and issueing a force end
664 */
665static void
666spider_net_disable_rxdmac(struct spider_net_card *card)
667{
668 spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
669 SPIDER_NET_DMA_RX_FEND_VALUE);
670}
671
672/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700673 * spider_net_prepare_tx_descr - fill tx descriptor with skb data
674 * @card: card structure
675 * @descr: descriptor structure to fill out
676 * @skb: packet to use
677 *
678 * returns 0 on success, <0 on failure.
679 *
680 * fills out the descriptor structure with skb data and len. Copies data,
681 * if needed (32bit DMA!)
682 */
683static int
684spider_net_prepare_tx_descr(struct spider_net_card *card,
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700685 struct sk_buff *skb)
686{
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600687 struct spider_net_descr_chain *chain = &card->tx_chain;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500688 struct spider_net_descr *descr;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600689 struct spider_net_hw_descr *hwdescr;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500690 dma_addr_t buf;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500691 unsigned long flags;
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500692
James K Lewis9c434f52006-11-17 14:39:36 -0800693 buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
Olof Johanssond4b0a4c2006-09-27 14:02:26 -0500694 if (pci_dma_mapping_error(buf)) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500695 if (netif_msg_tx_err(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700696 pr_err("could not iommu-map packet (%p, %i). "
James K Lewis9c434f52006-11-17 14:39:36 -0800697 "Dropping packet\n", skb->data, skb->len);
Jim Lewis9b6b0b82006-09-22 17:22:53 -0700698 card->spider_stats.tx_iommu_map_error++;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700699 return -ENOMEM;
700 }
701
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600702 spin_lock_irqsave(&chain->lock, flags);
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500703 descr = card->tx_chain.head;
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600704 if (descr->next == chain->tail->prev) {
705 spin_unlock_irqrestore(&chain->lock, flags);
706 pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
707 return -ENOMEM;
708 }
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600709 hwdescr = descr->hwdescr;
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600710 chain->head = descr->next;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500711
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700712 descr->skb = skb;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600713 hwdescr->buf_addr = buf;
714 hwdescr->buf_size = skb->len;
715 hwdescr->next_descr_addr = 0;
716 hwdescr->data_status = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700717
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600718 hwdescr->dmac_cmd_status =
Jens Osterkampbdd01502006-07-13 11:54:08 +0200719 SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600720 spin_unlock_irqrestore(&chain->lock, flags);
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500721
Linas Vepstas33bdeec2007-04-16 22:54:13 -0700722 if (skb->protocol == htons(ETH_P_IP) && skb->ip_summed == CHECKSUM_PARTIAL)
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700723 switch (ip_hdr(skb)->protocol) {
Jens Osterkampbdd01502006-07-13 11:54:08 +0200724 case IPPROTO_TCP:
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600725 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200726 break;
727 case IPPROTO_UDP:
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600728 hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200729 break;
730 }
731
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500732 /* Chain the bus address, so that the DMA engine finds this descr. */
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600733 wmb();
734 descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200735
Linas Vepstas917a5b82006-10-10 16:01:51 -0500736 card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200737 return 0;
738}
739
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500740static int
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500741spider_net_set_low_watermark(struct spider_net_card *card)
742{
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600743 struct spider_net_descr *descr = card->tx_chain.tail;
744 struct spider_net_hw_descr *hwdescr;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500745 unsigned long flags;
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500746 int status;
747 int cnt=0;
748 int i;
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500749
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500750 /* Measure the length of the queue. Measurement does not
751 * need to be precise -- does not need a lock. */
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500752 while (descr != card->tx_chain.head) {
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600753 status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500754 if (status == SPIDER_NET_DESCR_NOT_IN_USE)
755 break;
756 descr = descr->next;
757 cnt++;
758 }
759
760 /* If TX queue is short, don't even bother with interrupts */
Linas Vepstasd4ed8f82006-12-13 15:06:59 -0600761 if (cnt < card->tx_chain.num_desc/4)
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500762 return cnt;
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500763
764 /* Set low-watermark 3/4th's of the way into the queue. */
765 descr = card->tx_chain.tail;
766 cnt = (cnt*3)/4;
767 for (i=0;i<cnt; i++)
768 descr = descr->next;
769
770 /* Set the new watermark, clear the old watermark */
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500771 spin_lock_irqsave(&card->tx_chain.lock, flags);
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600772 descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
773 if (card->low_watermark && card->low_watermark != descr) {
774 hwdescr = card->low_watermark->hwdescr;
775 hwdescr->dmac_cmd_status =
776 hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
777 }
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500778 card->low_watermark = descr;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500779 spin_unlock_irqrestore(&card->tx_chain.lock, flags);
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500780 return cnt;
Linas Vepstas204e5fa2006-10-10 16:11:33 -0500781}
782
Jens Osterkampbdd01502006-07-13 11:54:08 +0200783/**
784 * spider_net_release_tx_chain - processes sent tx descriptors
785 * @card: adapter structure
786 * @brutal: if set, don't care about whether descriptor seems to be in use
787 *
788 * returns 0 if the tx ring is empty, otherwise 1.
789 *
790 * spider_net_release_tx_chain releases the tx descriptors that spider has
791 * finished with (if non-brutal) or simply release tx descriptors (if brutal).
792 * If some other context is calling this function, we return 1 so that we're
793 * scheduled again (if we were scheduled) and will not loose initiative.
794 */
795static int
796spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
797{
798 struct spider_net_descr_chain *chain = &card->tx_chain;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500799 struct spider_net_descr *descr;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600800 struct spider_net_hw_descr *hwdescr;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500801 struct sk_buff *skb;
802 u32 buf_addr;
803 unsigned long flags;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200804 int status;
805
Linas Vepstas5c8e98f2007-02-20 16:41:59 -0600806 while (1) {
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500807 spin_lock_irqsave(&chain->lock, flags);
Linas Vepstas5c8e98f2007-02-20 16:41:59 -0600808 if (chain->tail == chain->head) {
809 spin_unlock_irqrestore(&chain->lock, flags);
810 return 0;
811 }
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500812 descr = chain->tail;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600813 hwdescr = descr->hwdescr;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500814
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600815 status = spider_net_get_descr_status(hwdescr);
Jens Osterkampbdd01502006-07-13 11:54:08 +0200816 switch (status) {
817 case SPIDER_NET_DESCR_COMPLETE:
818 card->netdev_stats.tx_packets++;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500819 card->netdev_stats.tx_bytes += descr->skb->len;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200820 break;
821
822 case SPIDER_NET_DESCR_CARDOWNED:
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500823 if (!brutal) {
824 spin_unlock_irqrestore(&chain->lock, flags);
Jens Osterkampbdd01502006-07-13 11:54:08 +0200825 return 1;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500826 }
827
Jens Osterkampbdd01502006-07-13 11:54:08 +0200828 /* fallthrough, if we release the descriptors
829 * brutally (then we don't care about
830 * SPIDER_NET_DESCR_CARDOWNED) */
831
832 case SPIDER_NET_DESCR_RESPONSE_ERROR:
833 case SPIDER_NET_DESCR_PROTECTION_ERROR:
834 case SPIDER_NET_DESCR_FORCE_END:
835 if (netif_msg_tx_err(card))
836 pr_err("%s: forcing end of tx descriptor "
837 "with status x%02x\n",
838 card->netdev->name, status);
839 card->netdev_stats.tx_errors++;
840 break;
841
842 default:
843 card->netdev_stats.tx_dropped++;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500844 if (!brutal) {
845 spin_unlock_irqrestore(&chain->lock, flags);
Linas Vepstasc3fee4c2006-10-10 16:00:04 -0500846 return 1;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500847 }
Jens Osterkampbdd01502006-07-13 11:54:08 +0200848 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700849
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500850 chain->tail = descr->next;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600851 hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500852 skb = descr->skb;
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600853 descr->skb = NULL;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600854 buf_addr = hwdescr->buf_addr;
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500855 spin_unlock_irqrestore(&chain->lock, flags);
856
857 /* unmap the skb */
858 if (skb) {
James K Lewis9c434f52006-11-17 14:39:36 -0800859 pci_unmap_single(card->pdev, buf_addr, skb->len,
860 PCI_DMA_TODEVICE);
Linas Vepstas9cc7bf72006-10-10 16:14:29 -0500861 dev_kfree_skb(skb);
862 }
863 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700864 return 0;
865}
866
867/**
868 * spider_net_kick_tx_dma - enables TX DMA processing
869 * @card: card structure
870 * @descr: descriptor address to enable TX processing at
871 *
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500872 * This routine will start the transmit DMA running if
873 * it is not already running. This routine ned only be
874 * called when queueing a new packet to an empty tx queue.
875 * Writes the current tx chain head as start address
876 * of the tx descriptor chain and enables the transmission
877 * DMA engine.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700878 */
Jens Osterkampbdd01502006-07-13 11:54:08 +0200879static inline void
880spider_net_kick_tx_dma(struct spider_net_card *card)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700881{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200882 struct spider_net_descr *descr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700883
Jens Osterkampbdd01502006-07-13 11:54:08 +0200884 if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
885 SPIDER_NET_TX_DMA_EN)
886 goto out;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700887
Jens Osterkampbdd01502006-07-13 11:54:08 +0200888 descr = card->tx_chain.tail;
889 for (;;) {
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600890 if (spider_net_get_descr_status(descr->hwdescr) ==
Jens Osterkampbdd01502006-07-13 11:54:08 +0200891 SPIDER_NET_DESCR_CARDOWNED) {
892 spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
893 descr->bus_addr);
894 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
895 SPIDER_NET_DMA_TX_VALUE);
896 break;
897 }
898 if (descr == card->tx_chain.head)
899 break;
900 descr = descr->next;
901 }
902
903out:
904 mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700905}
906
907/**
908 * spider_net_xmit - transmits a frame over the device
909 * @skb: packet to send out
910 * @netdev: interface device structure
911 *
Jens Osterkampbdd01502006-07-13 11:54:08 +0200912 * returns 0 on success, !0 on failure
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700913 */
914static int
915spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
916{
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500917 int cnt;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700918 struct spider_net_card *card = netdev_priv(netdev);
Jens Osterkampbdd01502006-07-13 11:54:08 +0200919
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500920 spider_net_release_tx_chain(card, 0);
921
Linas Vepstasd9c199e2007-02-20 16:41:03 -0600922 if (spider_net_prepare_tx_descr(card, skb) != 0) {
Jim Lewis9b6b0b82006-09-22 17:22:53 -0700923 card->netdev_stats.tx_dropped++;
Linas Vepstas313ef4b2006-10-10 16:04:00 -0500924 netif_stop_queue(netdev);
925 return NETDEV_TX_BUSY;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200926 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700927
Linas Vepstasa664ccf2006-10-10 16:18:18 -0500928 cnt = spider_net_set_low_watermark(card);
929 if (cnt < 5)
930 spider_net_kick_tx_dma(card);
Linas Vepstas313ef4b2006-10-10 16:04:00 -0500931 return NETDEV_TX_OK;
Jens Osterkampbdd01502006-07-13 11:54:08 +0200932}
933
934/**
935 * spider_net_cleanup_tx_ring - cleans up the TX ring
936 * @card: card structure
937 *
Linas Vepstas68a8c602006-10-10 16:13:05 -0500938 * spider_net_cleanup_tx_ring is called by either the tx_timer
939 * or from the NAPI polling routine.
940 * This routine releases resources associted with transmitted
941 * packets, including updating the queue tail pointer.
Jens Osterkampbdd01502006-07-13 11:54:08 +0200942 */
943static void
944spider_net_cleanup_tx_ring(struct spider_net_card *card)
945{
Jens Osterkampbdd01502006-07-13 11:54:08 +0200946 if ((spider_net_release_tx_chain(card, 0) != 0) &&
Linas Vepstas313ef4b2006-10-10 16:04:00 -0500947 (card->netdev->flags & IFF_UP)) {
Jens Osterkampbdd01502006-07-13 11:54:08 +0200948 spider_net_kick_tx_dma(card);
Linas Vepstas313ef4b2006-10-10 16:04:00 -0500949 netif_wake_queue(card->netdev);
950 }
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700951}
952
953/**
954 * spider_net_do_ioctl - called for device ioctls
955 * @netdev: interface device structure
956 * @ifr: request parameter structure for ioctl
957 * @cmd: command code for ioctl
958 *
959 * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
960 * -EOPNOTSUPP is returned, if an unknown ioctl was requested
961 */
962static int
963spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
964{
965 switch (cmd) {
966 default:
967 return -EOPNOTSUPP;
968 }
969}
970
971/**
972 * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
973 * @descr: descriptor to process
974 * @card: card structure
975 *
Linas Vepstas05b346b2006-12-13 15:15:15 -0600976 * Fills out skb structure and passes the data to the stack.
977 * The descriptor state is not changed.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700978 */
Linas Vepstas7f7223b2006-12-13 15:17:39 -0600979static void
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700980spider_net_pass_skb_up(struct spider_net_descr *descr,
Linas Vepstas1cd173f2006-12-13 15:12:26 -0600981 struct spider_net_card *card)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700982{
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600983 struct spider_net_hw_descr *hwdescr= descr->hwdescr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700984 struct sk_buff *skb;
985 struct net_device *netdev;
986 u32 data_status, data_error;
987
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600988 data_status = hwdescr->data_status;
989 data_error = hwdescr->data_error;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700990 netdev = card->netdev;
991
Arnd Bergmann11f1a522006-01-12 17:16:44 -0500992 skb = descr->skb;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -0600993 skb_put(skb, hwdescr->valid_size);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -0700994
995 /* the card seems to add 2 bytes of junk in front
996 * of the ethernet frame */
997#define SPIDER_MISALIGN 2
998 skb_pull(skb, SPIDER_MISALIGN);
999 skb->protocol = eth_type_trans(skb, netdev);
1000
1001 /* checksum offload */
1002 if (card->options.rx_csum) {
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001003 if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
1004 SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
1005 !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001006 skb->ip_summed = CHECKSUM_UNNECESSARY;
1007 else
1008 skb->ip_summed = CHECKSUM_NONE;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001009 } else
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001010 skb->ip_summed = CHECKSUM_NONE;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001011
1012 if (data_status & SPIDER_NET_VLAN_PACKET) {
1013 /* further enhancements: HW-accel VLAN
1014 * vlan_hwaccel_receive_skb
1015 */
1016 }
1017
1018 /* pass skb up to stack */
Linas Vepstas1cd173f2006-12-13 15:12:26 -06001019 netif_receive_skb(skb);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001020
1021 /* update netdevice statistics */
1022 card->netdev_stats.rx_packets++;
1023 card->netdev_stats.rx_bytes += skb->len;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001024}
1025
Linas Vepstas6d249982006-12-13 15:23:56 -06001026#ifdef DEBUG
1027static void show_rx_chain(struct spider_net_card *card)
1028{
1029 struct spider_net_descr_chain *chain = &card->rx_chain;
1030 struct spider_net_descr *start= chain->tail;
1031 struct spider_net_descr *descr= start;
1032 int status;
1033
1034 int cnt = 0;
1035 int cstat = spider_net_get_descr_status(descr);
1036 printk(KERN_INFO "RX chain tail at descr=%ld\n",
1037 (start - card->descr) - card->tx_chain.num_desc);
1038 status = cstat;
1039 do
1040 {
1041 status = spider_net_get_descr_status(descr);
1042 if (cstat != status) {
1043 printk(KERN_INFO "Have %d descrs with stat=x%08x\n", cnt, cstat);
1044 cstat = status;
1045 cnt = 0;
1046 }
1047 cnt ++;
1048 descr = descr->next;
1049 } while (descr != start);
1050 printk(KERN_INFO "Last %d descrs with stat=x%08x\n", cnt, cstat);
1051}
1052#endif
1053
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001054/**
Linas Vepstas7376e732007-02-20 16:42:59 -06001055 * spider_net_decode_one_descr - processes an RX descriptor
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001056 * @card: card structure
1057 *
Linas Vepstas7376e732007-02-20 16:42:59 -06001058 * Returns 1 if a packet has been sent to the stack, otherwise 0.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001059 *
Linas Vepstas7376e732007-02-20 16:42:59 -06001060 * Processes an RX descriptor by iommu-unmapping the data buffer
1061 * and passing the packet up to the stack. This function is called
1062 * in softirq context, e.g. either bottom half from interrupt or
1063 * NAPI polling context.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001064 */
1065static int
Linas Vepstas1cd173f2006-12-13 15:12:26 -06001066spider_net_decode_one_descr(struct spider_net_card *card)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001067{
Jens Osterkampbdd01502006-07-13 11:54:08 +02001068 struct spider_net_descr_chain *chain = &card->rx_chain;
1069 struct spider_net_descr *descr = chain->tail;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001070 struct spider_net_hw_descr *hwdescr = descr->hwdescr;
Jens Osterkampbdd01502006-07-13 11:54:08 +02001071 int status;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001072
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001073 status = spider_net_get_descr_status(hwdescr);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001074
Linas Vepstas80dab7c2006-12-13 15:18:52 -06001075 /* Nothing in the descriptor, or ring must be empty */
1076 if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
1077 (status == SPIDER_NET_DESCR_NOT_IN_USE))
Linas Vepstas1cd173f2006-12-13 15:12:26 -06001078 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001079
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001080 /* descriptor definitively used -- move on tail */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001081 chain->tail = descr->next;
1082
Linas Vepstas05b346b2006-12-13 15:15:15 -06001083 /* unmap descriptor */
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001084 pci_unmap_single(card->pdev, hwdescr->buf_addr,
Linas Vepstas05b346b2006-12-13 15:15:15 -06001085 SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
1086
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001087 if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
1088 (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
1089 (status == SPIDER_NET_DESCR_FORCE_END) ) {
1090 if (netif_msg_rx_err(card))
1091 pr_err("%s: dropping RX descriptor with state %d\n",
1092 card->netdev->name, status);
1093 card->netdev_stats.rx_dropped++;
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001094 goto bad_desc;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001095 }
1096
1097 if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
1098 (status != SPIDER_NET_DESCR_FRAME_END) ) {
Linas Vepstas5a028872006-12-13 15:08:25 -06001099 if (netif_msg_rx_err(card))
Linas Vepstas7376e732007-02-20 16:42:59 -06001100 pr_err("%s: RX descriptor with unknown state %d\n",
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001101 card->netdev->name, status);
Linas Vepstas5a028872006-12-13 15:08:25 -06001102 card->spider_stats.rx_desc_unk_state++;
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001103 goto bad_desc;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001104 }
1105
Linas Vepstas366684b2006-12-13 15:16:18 -06001106 /* The cases we'll throw away the packet immediately */
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001107 if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
Linas Vepstas366684b2006-12-13 15:16:18 -06001108 if (netif_msg_rx_err(card))
1109 pr_err("%s: error in received descriptor found, "
1110 "data_status=x%08x, data_error=x%08x\n",
1111 card->netdev->name,
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001112 hwdescr->data_status, hwdescr->data_error);
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001113 goto bad_desc;
Linas Vepstas366684b2006-12-13 15:16:18 -06001114 }
1115
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001116 if (hwdescr->dmac_cmd_status & 0xfefe) {
Linas Vepstas6d249982006-12-13 15:23:56 -06001117 pr_err("%s: bad status, cmd_status=x%08x\n",
1118 card->netdev->name,
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001119 hwdescr->dmac_cmd_status);
1120 pr_err("buf_addr=x%08x\n", hwdescr->buf_addr);
1121 pr_err("buf_size=x%08x\n", hwdescr->buf_size);
1122 pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
1123 pr_err("result_size=x%08x\n", hwdescr->result_size);
1124 pr_err("valid_size=x%08x\n", hwdescr->valid_size);
1125 pr_err("data_status=x%08x\n", hwdescr->data_status);
1126 pr_err("data_error=x%08x\n", hwdescr->data_error);
Linas Vepstas6d249982006-12-13 15:23:56 -06001127 pr_err("which=%ld\n", descr - card->rx_chain.ring);
1128
1129 card->spider_stats.rx_desc_error++;
1130 goto bad_desc;
1131 }
1132
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001133 /* Ok, we've got a packet in descr */
1134 spider_net_pass_skb_up(descr, card);
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001135 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001136 return 1;
1137
1138bad_desc:
1139 dev_kfree_skb_irq(descr->skb);
Linas Vepstasd9c199e2007-02-20 16:41:03 -06001140 descr->skb = NULL;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06001141 hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
Linas Vepstas7f7223b2006-12-13 15:17:39 -06001142 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001143}
1144
1145/**
1146 * spider_net_poll - NAPI poll function called by the stack to return packets
1147 * @netdev: interface device structure
1148 * @budget: number of packets we can pass to the stack at most
1149 *
1150 * returns 0 if no more packets available to the driver/stack. Returns 1,
1151 * if the quota is exceeded, but the driver has still packets.
1152 *
1153 * spider_net_poll returns all packets from the rx descriptors to the stack
1154 * (using netif_receive_skb). If all/enough packets are up, the driver
1155 * reenables interrupts and returns 0. If not, 1 is returned.
1156 */
1157static int
1158spider_net_poll(struct net_device *netdev, int *budget)
1159{
1160 struct spider_net_card *card = netdev_priv(netdev);
1161 int packets_to_do, packets_done = 0;
1162 int no_more_packets = 0;
1163
Linas Vepstas68a8c602006-10-10 16:13:05 -05001164 spider_net_cleanup_tx_ring(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001165 packets_to_do = min(*budget, netdev->quota);
1166
1167 while (packets_to_do) {
Linas Vepstas1cd173f2006-12-13 15:12:26 -06001168 if (spider_net_decode_one_descr(card)) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001169 packets_done++;
1170 packets_to_do--;
1171 } else {
1172 /* no more packets for the stack */
1173 no_more_packets = 1;
1174 break;
1175 }
1176 }
1177
1178 netdev->quota -= packets_done;
1179 *budget -= packets_done;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001180 spider_net_refill_rx_chain(card);
Linas Vepstas80dab7c2006-12-13 15:18:52 -06001181 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001182
1183 /* if all packets are in the stack, enable interrupts and return 0 */
1184 /* if not, return 1 */
1185 if (no_more_packets) {
1186 netif_rx_complete(netdev);
1187 spider_net_rx_irq_on(card);
1188 return 0;
1189 }
1190
1191 return 1;
1192}
1193
1194/**
1195 * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
1196 * @netdev: interface device structure
1197 * @grp: vlan_group structure that is registered (NULL on destroying interface)
1198 */
1199static void
1200spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
1201{
1202 /* further enhancement... yet to do */
1203 return;
1204}
1205
1206/**
1207 * spider_net_vlan_rx_add - adds VLAN id to the card filter
1208 * @netdev: interface device structure
1209 * @vid: VLAN id to add
1210 */
1211static void
1212spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
1213{
1214 /* further enhancement... yet to do */
1215 /* add vid to card's VLAN filter table */
1216 return;
1217}
1218
1219/**
1220 * spider_net_vlan_rx_kill - removes VLAN id to the card filter
1221 * @netdev: interface device structure
1222 * @vid: VLAN id to remove
1223 */
1224static void
1225spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
1226{
1227 /* further enhancement... yet to do */
1228 /* remove vid from card's VLAN filter table */
1229}
1230
1231/**
1232 * spider_net_get_stats - get interface statistics
1233 * @netdev: interface device structure
1234 *
1235 * returns the interface statistics residing in the spider_net_card struct
1236 */
1237static struct net_device_stats *
1238spider_net_get_stats(struct net_device *netdev)
1239{
1240 struct spider_net_card *card = netdev_priv(netdev);
1241 struct net_device_stats *stats = &card->netdev_stats;
1242 return stats;
1243}
1244
1245/**
1246 * spider_net_change_mtu - changes the MTU of an interface
1247 * @netdev: interface device structure
1248 * @new_mtu: new MTU value
1249 *
1250 * returns 0 on success, <0 on failure
1251 */
1252static int
1253spider_net_change_mtu(struct net_device *netdev, int new_mtu)
1254{
1255 /* no need to re-alloc skbs or so -- the max mtu is about 2.3k
1256 * and mtu is outbound only anyway */
1257 if ( (new_mtu < SPIDER_NET_MIN_MTU ) ||
1258 (new_mtu > SPIDER_NET_MAX_MTU) )
1259 return -EINVAL;
1260 netdev->mtu = new_mtu;
1261 return 0;
1262}
1263
1264/**
1265 * spider_net_set_mac - sets the MAC of an interface
1266 * @netdev: interface device structure
1267 * @ptr: pointer to new MAC address
1268 *
1269 * Returns 0 on success, <0 on failure. Currently, we don't support this
1270 * and will always return EOPNOTSUPP.
1271 */
1272static int
1273spider_net_set_mac(struct net_device *netdev, void *p)
1274{
1275 struct spider_net_card *card = netdev_priv(netdev);
Jens Osterkamp054034d2005-09-06 19:30:55 -07001276 u32 macl, macu, regvalue;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001277 struct sockaddr *addr = p;
1278
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001279 if (!is_valid_ether_addr(addr->sa_data))
1280 return -EADDRNOTAVAIL;
1281
Jens Osterkamp054034d2005-09-06 19:30:55 -07001282 /* switch off GMACTPE and GMACRPE */
1283 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1284 regvalue &= ~((1 << 5) | (1 << 6));
1285 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1286
1287 /* write mac */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001288 macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
1289 (addr->sa_data[2]<<8) + (addr->sa_data[3]);
1290 macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
1291 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
1292 spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
1293
Jens Osterkamp054034d2005-09-06 19:30:55 -07001294 /* switch GMACTPE and GMACRPE back on */
1295 regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
1296 regvalue |= ((1 << 5) | (1 << 6));
1297 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
1298
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001299 spider_net_set_promisc(card);
1300
1301 /* look up, whether we have been successful */
1302 if (spider_net_get_mac_address(netdev))
1303 return -EADDRNOTAVAIL;
1304 if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
1305 return -EADDRNOTAVAIL;
1306
1307 return 0;
1308}
1309
1310/**
Kou Ishizakiabdb66b2007-02-20 16:33:41 -06001311 * spider_net_link_reset
1312 * @netdev: net device structure
1313 *
1314 * This is called when the PHY_LINK signal is asserted. For the blade this is
1315 * not connected so we should never get here.
1316 *
1317 */
1318static void
1319spider_net_link_reset(struct net_device *netdev)
1320{
1321
1322 struct spider_net_card *card = netdev_priv(netdev);
1323
1324 del_timer_sync(&card->aneg_timer);
1325
1326 /* clear interrupt, block further interrupts */
1327 spider_net_write_reg(card, SPIDER_NET_GMACST,
1328 spider_net_read_reg(card, SPIDER_NET_GMACST));
1329 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
1330
1331 /* reset phy and setup aneg */
1332 spider_net_setup_aneg(card);
1333 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1334
1335}
1336
1337/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001338 * spider_net_handle_error_irq - handles errors raised by an interrupt
1339 * @card: card structure
1340 * @status_reg: interrupt status register 0 (GHIINT0STS)
1341 *
1342 * spider_net_handle_error_irq treats or ignores all error conditions
1343 * found when an interrupt is presented
1344 */
1345static void
1346spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
1347{
1348 u32 error_reg1, error_reg2;
1349 u32 i;
1350 int show_error = 1;
1351
1352 error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
1353 error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
1354
1355 /* check GHIINT0STS ************************************/
1356 if (status_reg)
1357 for (i = 0; i < 32; i++)
1358 if (status_reg & (1<<i))
1359 switch (i)
1360 {
1361 /* let error_reg1 and error_reg2 evaluation decide, what to do
1362 case SPIDER_NET_PHYINT:
1363 case SPIDER_NET_GMAC2INT:
1364 case SPIDER_NET_GMAC1INT:
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001365 case SPIDER_NET_GFIFOINT:
1366 case SPIDER_NET_DMACINT:
1367 case SPIDER_NET_GSYSINT:
1368 break; */
1369
Linas Vepstas98b90402006-10-10 16:08:42 -05001370 case SPIDER_NET_GIPSINT:
1371 show_error = 0;
1372 break;
1373
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001374 case SPIDER_NET_GPWOPCMPINT:
1375 /* PHY write operation completed */
1376 show_error = 0;
1377 break;
1378 case SPIDER_NET_GPROPCMPINT:
1379 /* PHY read operation completed */
1380 /* we don't use semaphores, as we poll for the completion
1381 * of the read operation in spider_net_read_phy. Should take
1382 * about 50 us */
1383 show_error = 0;
1384 break;
1385 case SPIDER_NET_GPWFFINT:
1386 /* PHY command queue full */
1387 if (netif_msg_intr(card))
1388 pr_err("PHY write queue full\n");
1389 show_error = 0;
1390 break;
1391
1392 /* case SPIDER_NET_GRMDADRINT: not used. print a message */
1393 /* case SPIDER_NET_GRMARPINT: not used. print a message */
1394 /* case SPIDER_NET_GRMMPINT: not used. print a message */
1395
1396 case SPIDER_NET_GDTDEN0INT:
1397 /* someone has set TX_DMA_EN to 0 */
1398 show_error = 0;
1399 break;
1400
1401 case SPIDER_NET_GDDDEN0INT: /* fallthrough */
1402 case SPIDER_NET_GDCDEN0INT: /* fallthrough */
1403 case SPIDER_NET_GDBDEN0INT: /* fallthrough */
1404 case SPIDER_NET_GDADEN0INT:
1405 /* someone has set RX_DMA_EN to 0 */
1406 show_error = 0;
1407 break;
1408
1409 /* RX interrupts */
1410 case SPIDER_NET_GDDFDCINT:
1411 case SPIDER_NET_GDCFDCINT:
1412 case SPIDER_NET_GDBFDCINT:
1413 case SPIDER_NET_GDAFDCINT:
1414 /* case SPIDER_NET_GDNMINT: not used. print a message */
1415 /* case SPIDER_NET_GCNMINT: not used. print a message */
1416 /* case SPIDER_NET_GBNMINT: not used. print a message */
1417 /* case SPIDER_NET_GANMINT: not used. print a message */
1418 /* case SPIDER_NET_GRFNMINT: not used. print a message */
1419 show_error = 0;
1420 break;
1421
1422 /* TX interrupts */
1423 case SPIDER_NET_GDTFDCINT:
1424 show_error = 0;
1425 break;
1426 case SPIDER_NET_GTTEDINT:
1427 show_error = 0;
1428 break;
1429 case SPIDER_NET_GDTDCEINT:
1430 /* chain end. If a descriptor should be sent, kick off
1431 * tx dma
Linas Vepstas98b90402006-10-10 16:08:42 -05001432 if (card->tx_chain.tail != card->tx_chain.head)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001433 spider_net_kick_tx_dma(card);
Linas Vepstas98b90402006-10-10 16:08:42 -05001434 */
1435 show_error = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001436 break;
1437
1438 /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
1439 /* case SPIDER_NET_GFREECNTINT: not used. print a message */
1440 }
1441
1442 /* check GHIINT1STS ************************************/
1443 if (error_reg1)
1444 for (i = 0; i < 32; i++)
1445 if (error_reg1 & (1<<i))
1446 switch (i)
1447 {
1448 case SPIDER_NET_GTMFLLINT:
Ishizaki Koufc8e13da2007-02-20 16:37:42 -06001449 /* TX RAM full may happen on a usual case.
1450 * Logging is not needed. */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001451 show_error = 0;
1452 break;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001453 case SPIDER_NET_GRFDFLLINT: /* fallthrough */
1454 case SPIDER_NET_GRFCFLLINT: /* fallthrough */
1455 case SPIDER_NET_GRFBFLLINT: /* fallthrough */
1456 case SPIDER_NET_GRFAFLLINT: /* fallthrough */
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001457 case SPIDER_NET_GRMFLLINT:
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001458 if (netif_msg_intr(card) && net_ratelimit())
Linas Vepstas5a028872006-12-13 15:08:25 -06001459 pr_err("Spider RX RAM full, incoming packets "
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001460 "might be discarded!\n");
1461 spider_net_rx_irq_off(card);
Linas Vepstas75856172006-12-13 15:10:06 -06001462 netif_rx_schedule(card->netdev);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001463 show_error = 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001464 break;
1465
1466 /* case SPIDER_NET_GTMSHTINT: problem, print a message */
1467 case SPIDER_NET_GDTINVDINT:
1468 /* allrighty. tx from previous descr ok */
1469 show_error = 0;
1470 break;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001471
1472 /* chain end */
1473 case SPIDER_NET_GDDDCEINT: /* fallthrough */
1474 case SPIDER_NET_GDCDCEINT: /* fallthrough */
1475 case SPIDER_NET_GDBDCEINT: /* fallthrough */
1476 case SPIDER_NET_GDADCEINT:
Linas Vepstas5a028872006-12-13 15:08:25 -06001477 if (netif_msg_intr(card) && net_ratelimit())
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001478 pr_err("got descriptor chain end interrupt, "
1479 "restarting DMAC %c.\n",
Linas Vepstas37aad752006-10-10 16:06:53 -05001480 'D'-(i-SPIDER_NET_GDDDCEINT)/3);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001481 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001482 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001483 show_error = 0;
1484 break;
1485
1486 /* invalid descriptor */
1487 case SPIDER_NET_GDDINVDINT: /* fallthrough */
1488 case SPIDER_NET_GDCINVDINT: /* fallthrough */
1489 case SPIDER_NET_GDBINVDINT: /* fallthrough */
1490 case SPIDER_NET_GDAINVDINT:
1491 /* could happen when rx chain is full */
1492 spider_net_refill_rx_chain(card);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001493 spider_net_enable_rxdmac(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001494 show_error = 0;
1495 break;
1496
1497 /* case SPIDER_NET_GDTRSERINT: problem, print a message */
1498 /* case SPIDER_NET_GDDRSERINT: problem, print a message */
1499 /* case SPIDER_NET_GDCRSERINT: problem, print a message */
1500 /* case SPIDER_NET_GDBRSERINT: problem, print a message */
1501 /* case SPIDER_NET_GDARSERINT: problem, print a message */
1502 /* case SPIDER_NET_GDSERINT: problem, print a message */
1503 /* case SPIDER_NET_GDTPTERINT: problem, print a message */
1504 /* case SPIDER_NET_GDDPTERINT: problem, print a message */
1505 /* case SPIDER_NET_GDCPTERINT: problem, print a message */
1506 /* case SPIDER_NET_GDBPTERINT: problem, print a message */
1507 /* case SPIDER_NET_GDAPTERINT: problem, print a message */
1508 default:
1509 show_error = 1;
1510 break;
1511 }
1512
1513 /* check GHIINT2STS ************************************/
1514 if (error_reg2)
1515 for (i = 0; i < 32; i++)
1516 if (error_reg2 & (1<<i))
1517 switch (i)
1518 {
1519 /* there is nothing we can (want to) do at this time. Log a
1520 * message, we can switch on and off the specific values later on
1521 case SPIDER_NET_GPROPERINT:
1522 case SPIDER_NET_GMCTCRSNGINT:
1523 case SPIDER_NET_GMCTLCOLINT:
1524 case SPIDER_NET_GMCTTMOTINT:
1525 case SPIDER_NET_GMCRCAERINT:
1526 case SPIDER_NET_GMCRCALERINT:
1527 case SPIDER_NET_GMCRALNERINT:
1528 case SPIDER_NET_GMCROVRINT:
1529 case SPIDER_NET_GMCRRNTINT:
1530 case SPIDER_NET_GMCRRXERINT:
1531 case SPIDER_NET_GTITCSERINT:
1532 case SPIDER_NET_GTIFMTERINT:
1533 case SPIDER_NET_GTIPKTRVKINT:
1534 case SPIDER_NET_GTISPINGINT:
1535 case SPIDER_NET_GTISADNGINT:
1536 case SPIDER_NET_GTISPDNGINT:
1537 case SPIDER_NET_GRIFMTERINT:
1538 case SPIDER_NET_GRIPKTRVKINT:
1539 case SPIDER_NET_GRISPINGINT:
1540 case SPIDER_NET_GRISADNGINT:
1541 case SPIDER_NET_GRISPDNGINT:
1542 break;
1543 */
1544 default:
1545 break;
1546 }
1547
Linas Vepstas5a028872006-12-13 15:08:25 -06001548 if ((show_error) && (netif_msg_intr(card)) && net_ratelimit())
Linas Vepstas98b90402006-10-10 16:08:42 -05001549 pr_err("Got error interrupt on %s, GHIINT0STS = 0x%08x, "
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001550 "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
Linas Vepstas98b90402006-10-10 16:08:42 -05001551 card->netdev->name,
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001552 status_reg, error_reg1, error_reg2);
1553
1554 /* clear interrupt sources */
1555 spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
1556 spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
1557}
1558
1559/**
1560 * spider_net_interrupt - interrupt handler for spider_net
1561 * @irq: interupt number
1562 * @ptr: pointer to net_device
1563 * @regs: PU registers
1564 *
1565 * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
1566 * interrupt found raised by card.
1567 *
1568 * This is the interrupt handler, that turns off
1569 * interrupts for this device and makes the stack poll the driver
1570 */
1571static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +01001572spider_net_interrupt(int irq, void *ptr)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001573{
1574 struct net_device *netdev = ptr;
1575 struct spider_net_card *card = netdev_priv(netdev);
1576 u32 status_reg;
1577
1578 status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
1579
1580 if (!status_reg)
1581 return IRQ_NONE;
1582
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001583 if (status_reg & SPIDER_NET_RXINT ) {
1584 spider_net_rx_irq_off(card);
1585 netif_rx_schedule(netdev);
1586 }
Linas Vepstas68a8c602006-10-10 16:13:05 -05001587 if (status_reg & SPIDER_NET_TXINT)
1588 netif_rx_schedule(netdev);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001589
Kou Ishizakiabdb66b2007-02-20 16:33:41 -06001590 if (status_reg & SPIDER_NET_LINKINT)
1591 spider_net_link_reset(netdev);
1592
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001593 if (status_reg & SPIDER_NET_ERRINT )
1594 spider_net_handle_error_irq(card, status_reg);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001595
1596 /* clear interrupt sources */
1597 spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
1598
1599 return IRQ_HANDLED;
1600}
1601
1602#ifdef CONFIG_NET_POLL_CONTROLLER
1603/**
1604 * spider_net_poll_controller - artificial interrupt for netconsole etc.
1605 * @netdev: interface device structure
1606 *
1607 * see Documentation/networking/netconsole.txt
1608 */
1609static void
1610spider_net_poll_controller(struct net_device *netdev)
1611{
1612 disable_irq(netdev->irq);
David Howells7d12e782006-10-05 14:55:46 +01001613 spider_net_interrupt(netdev->irq, netdev);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001614 enable_irq(netdev->irq);
1615}
1616#endif /* CONFIG_NET_POLL_CONTROLLER */
1617
1618/**
1619 * spider_net_init_card - initializes the card
1620 * @card: card structure
1621 *
1622 * spider_net_init_card initializes the card so that other registers can
1623 * be used
1624 */
1625static void
1626spider_net_init_card(struct spider_net_card *card)
1627{
1628 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1629 SPIDER_NET_CKRCTRL_STOP_VALUE);
1630
1631 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
1632 SPIDER_NET_CKRCTRL_RUN_VALUE);
Kou Ishizaki3342cf0e2007-02-20 16:36:14 -06001633
1634 /* trigger ETOMOD signal */
1635 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1636 spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
1637
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001638}
1639
1640/**
1641 * spider_net_enable_card - enables the card by setting all kinds of regs
1642 * @card: card structure
1643 *
1644 * spider_net_enable_card sets a lot of SMMIO registers to enable the device
1645 */
1646static void
1647spider_net_enable_card(struct spider_net_card *card)
1648{
1649 int i;
1650 /* the following array consists of (register),(value) pairs
1651 * that are set in this function. A register of 0 ends the list */
1652 u32 regs[][2] = {
1653 { SPIDER_NET_GRESUMINTNUM, 0 },
1654 { SPIDER_NET_GREINTNUM, 0 },
1655
1656 /* set interrupt frame number registers */
1657 /* clear the single DMA engine registers first */
1658 { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1659 { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1660 { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1661 { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
1662 /* then set, what we really need */
1663 { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
1664
1665 /* timer counter registers and stuff */
1666 { SPIDER_NET_GFREECNNUM, 0 },
1667 { SPIDER_NET_GONETIMENUM, 0 },
1668 { SPIDER_NET_GTOUTFRMNUM, 0 },
1669
1670 /* RX mode setting */
1671 { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
1672 /* TX mode setting */
1673 { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
1674 /* IPSEC mode setting */
1675 { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
1676
1677 { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
1678
1679 { SPIDER_NET_GMRWOLCTRL, 0 },
Jens Osterkampb636d172006-05-04 05:59:56 -04001680 { SPIDER_NET_GTESTMD, 0x10000000 },
1681 { SPIDER_NET_GTTQMSK, 0x00400040 },
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001682
1683 { SPIDER_NET_GMACINTEN, 0 },
1684
1685 /* flow control stuff */
1686 { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
1687 { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
1688
1689 { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
1690 { 0, 0}
1691 };
1692
1693 i = 0;
1694 while (regs[i][0]) {
1695 spider_net_write_reg(card, regs[i][0], regs[i][1]);
1696 i++;
1697 }
1698
1699 /* clear unicast filter table entries 1 to 14 */
1700 for (i = 1; i <= 14; i++) {
1701 spider_net_write_reg(card,
1702 SPIDER_NET_GMRUAFILnR + i * 8,
1703 0x00080000);
1704 spider_net_write_reg(card,
1705 SPIDER_NET_GMRUAFILnR + i * 8 + 4,
1706 0x00000000);
1707 }
1708
1709 spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
1710
1711 spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
1712
1713 /* set chain tail adress for RX chains and
1714 * enable DMA */
1715 spider_net_enable_rxchtails(card);
1716 spider_net_enable_rxdmac(card);
1717
1718 spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
1719
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001720 spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
1721 SPIDER_NET_LENLMT_VALUE);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001722 spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
1723 SPIDER_NET_OPMODE_VALUE);
1724
1725 /* set interrupt mask registers */
1726 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
1727 SPIDER_NET_INT0_MASK_VALUE);
1728 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
1729 SPIDER_NET_INT1_MASK_VALUE);
1730 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
1731 SPIDER_NET_INT2_MASK_VALUE);
Jens Osterkampbdd01502006-07-13 11:54:08 +02001732
1733 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
Linas Vepstas7bd54c82006-11-17 14:39:40 -08001734 SPIDER_NET_GDTBSTA);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001735}
1736
1737/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001738 * spider_net_download_firmware - loads firmware into the adapter
1739 * @card: card structure
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001740 * @firmware_ptr: pointer to firmware data
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001741 *
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001742 * spider_net_download_firmware loads the firmware data into the
1743 * adapter. It assumes the length etc. to be allright.
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001744 */
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001745static int
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001746spider_net_download_firmware(struct spider_net_card *card,
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10001747 const void *firmware_ptr)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001748{
1749 int sequencer, i;
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10001750 const u32 *fw_ptr = firmware_ptr;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001751
1752 /* stop sequencers */
1753 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1754 SPIDER_NET_STOP_SEQ_VALUE);
1755
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001756 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
1757 sequencer++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001758 spider_net_write_reg(card,
1759 SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001760 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001761 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
1762 sequencer * 8, *fw_ptr);
1763 fw_ptr++;
1764 }
1765 }
1766
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001767 if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
1768 return -EIO;
1769
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001770 spider_net_write_reg(card, SPIDER_NET_GSINIT,
1771 SPIDER_NET_RUN_SEQ_VALUE);
Arnd Bergmann0d3ea162006-01-12 17:16:41 -05001772
1773 return 0;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001774}
1775
1776/**
1777 * spider_net_init_firmware - reads in firmware parts
1778 * @card: card structure
1779 *
1780 * Returns 0 on success, <0 on failure
1781 *
1782 * spider_net_init_firmware opens the sequencer firmware and does some basic
1783 * checks. This function opens and releases the firmware structure. A call
1784 * to download the firmware is performed before the release.
1785 *
1786 * Firmware format
1787 * ===============
1788 * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
1789 * the program for each sequencer. Use the command
1790 * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
1791 * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
1792 * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
1793 *
1794 * to generate spider_fw.bin, if you have sequencer programs with something
1795 * like the following contents for each sequencer:
1796 * <ONE LINE COMMENT>
1797 * <FIRST 4-BYTES-WORD FOR SEQUENCER>
1798 * <SECOND 4-BYTES-WORD FOR SEQUENCER>
1799 * ...
1800 * <1024th 4-BYTES-WORD FOR SEQUENCER>
1801 */
1802static int
1803spider_net_init_firmware(struct spider_net_card *card)
1804{
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001805 struct firmware *firmware = NULL;
Arnd Bergmann030d6752006-01-12 17:16:42 -05001806 struct device_node *dn;
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10001807 const u8 *fw_prop = NULL;
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001808 int err = -ENOENT;
1809 int fw_size;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001810
Arnd Bergmann030d6752006-01-12 17:16:42 -05001811 if (request_firmware((const struct firmware **)&firmware,
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001812 SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
1813 if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
1814 netif_msg_probe(card) ) {
1815 pr_err("Incorrect size of spidernet firmware in " \
1816 "filesystem. Looking in host firmware...\n");
1817 goto try_host_fw;
1818 }
1819 err = spider_net_download_firmware(card, firmware->data);
Arnd Bergmann030d6752006-01-12 17:16:42 -05001820
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001821 release_firmware(firmware);
1822 if (err)
1823 goto try_host_fw;
Arnd Bergmann030d6752006-01-12 17:16:42 -05001824
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001825 goto done;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001826 }
1827
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001828try_host_fw:
1829 dn = pci_device_to_OF_node(card->pdev);
1830 if (!dn)
1831 goto out_err;
1832
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10001833 fw_prop = get_property(dn, "firmware", &fw_size);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001834 if (!fw_prop)
1835 goto out_err;
1836
1837 if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
1838 netif_msg_probe(card) ) {
1839 pr_err("Incorrect size of spidernet firmware in " \
1840 "host firmware\n");
1841 goto done;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001842 }
1843
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001844 err = spider_net_download_firmware(card, fw_prop);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001845
Arnd Bergmann11f1a522006-01-12 17:16:44 -05001846done:
1847 return err;
1848out_err:
1849 if (netif_msg_probe(card))
1850 pr_err("Couldn't find spidernet firmware in filesystem " \
1851 "or host firmware\n");
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07001852 return err;
1853}
1854
1855/**
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001856 * spider_net_open - called upon ifonfig up
1857 * @netdev: interface device structure
1858 *
1859 * returns 0 on success, <0 on failure
1860 *
1861 * spider_net_open allocates all the descriptors and memory needed for
1862 * operation, sets up multicast list and enables interrupts
1863 */
1864int
1865spider_net_open(struct net_device *netdev)
1866{
1867 struct spider_net_card *card = netdev_priv(netdev);
1868 int result;
1869
1870 result = spider_net_init_firmware(card);
1871 if (result)
1872 goto init_firmware_failed;
1873
1874 /* start probing with copper */
1875 spider_net_setup_aneg(card);
1876 if (card->phy.def->phy_id)
1877 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1878
1879 result = spider_net_init_chain(card, &card->tx_chain);
1880 if (result)
1881 goto alloc_tx_failed;
1882 card->low_watermark = NULL;
1883
1884 result = spider_net_init_chain(card, &card->rx_chain);
1885 if (result)
1886 goto alloc_rx_failed;
1887
1888 /* Allocate rx skbs */
1889 if (spider_net_alloc_rx_skbs(card))
1890 goto alloc_skbs_failed;
1891
1892 spider_net_set_multi(netdev);
1893
1894 /* further enhancement: setup hw vlan, if needed */
1895
1896 result = -EBUSY;
1897 if (request_irq(netdev->irq, spider_net_interrupt,
1898 IRQF_SHARED, netdev->name, netdev))
1899 goto register_int_failed;
1900
1901 spider_net_enable_card(card);
1902
1903 netif_start_queue(netdev);
1904 netif_carrier_on(netdev);
1905 netif_poll_enable(netdev);
1906
1907 return 0;
1908
1909register_int_failed:
1910 spider_net_free_rx_chain_contents(card);
1911alloc_skbs_failed:
1912 spider_net_free_chain(card, &card->rx_chain);
1913alloc_rx_failed:
1914 spider_net_free_chain(card, &card->tx_chain);
1915alloc_tx_failed:
1916 del_timer_sync(&card->aneg_timer);
1917init_firmware_failed:
1918 return result;
1919}
1920
1921/**
1922 * spider_net_link_phy
1923 * @data: used for pointer to card structure
1924 *
1925 */
1926static void spider_net_link_phy(unsigned long data)
1927{
1928 struct spider_net_card *card = (struct spider_net_card *)data;
1929 struct mii_phy *phy = &card->phy;
1930
1931 /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
1932 if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
1933
1934 pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
1935
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001936 switch (card->medium) {
1937 case BCM54XX_COPPER:
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001938 /* enable fiber with autonegotiation first */
1939 if (phy->def->ops->enable_fiber)
1940 phy->def->ops->enable_fiber(phy, 1);
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001941 card->medium = BCM54XX_FIBER;
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001942 break;
1943
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001944 case BCM54XX_FIBER:
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001945 /* fiber didn't come up, try to disable fiber autoneg */
1946 if (phy->def->ops->enable_fiber)
1947 phy->def->ops->enable_fiber(phy, 0);
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001948 card->medium = BCM54XX_UNKNOWN;
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001949 break;
1950
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001951 case BCM54XX_UNKNOWN:
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001952 /* copper, fiber with and without failed,
1953 * retry from beginning */
1954 spider_net_setup_aneg(card);
Jens Osterkamp4b23a552007-02-20 16:39:13 -06001955 card->medium = BCM54XX_COPPER;
Kou Ishizaki3cf761d2007-02-20 16:34:50 -06001956 break;
1957 }
1958
1959 card->aneg_count = 0;
1960 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1961 return;
1962 }
1963
1964 /* link still not up, try again later */
1965 if (!(phy->def->ops->poll_link(phy))) {
1966 card->aneg_count++;
1967 mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
1968 return;
1969 }
1970
1971 /* link came up, get abilities */
1972 phy->def->ops->read_link(phy);
1973
1974 spider_net_write_reg(card, SPIDER_NET_GMACST,
1975 spider_net_read_reg(card, SPIDER_NET_GMACST));
1976 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
1977
1978 if (phy->speed == 1000)
1979 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
1980 else
1981 spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
1982
1983 card->aneg_count = 0;
1984
1985 pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
1986 phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
1987 phy->autoneg==1 ? "" : "no ");
1988
1989 return;
1990}
1991
1992/**
1993 * spider_net_setup_phy - setup PHY
1994 * @card: card structure
1995 *
1996 * returns 0 on success, <0 on failure
1997 *
1998 * spider_net_setup_phy is used as part of spider_net_probe.
1999 **/
2000static int
2001spider_net_setup_phy(struct spider_net_card *card)
2002{
2003 struct mii_phy *phy = &card->phy;
2004
2005 spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
2006 SPIDER_NET_DMASEL_VALUE);
2007 spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
2008 SPIDER_NET_PHY_CTRL_VALUE);
2009
2010 phy->dev = card->netdev;
2011 phy->mdio_read = spider_net_read_phy;
2012 phy->mdio_write = spider_net_write_phy;
2013
2014 for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
2015 unsigned short id;
2016 id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
2017 if (id != 0x0000 && id != 0xffff) {
2018 if (!mii_phy_probe(phy, phy->mii_id)) {
2019 pr_info("Found %s.\n", phy->def->name);
2020 break;
2021 }
2022 }
2023 }
2024
2025 return 0;
2026}
2027
2028/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002029 * spider_net_workaround_rxramfull - work around firmware bug
2030 * @card: card structure
2031 *
2032 * no return value
2033 **/
2034static void
2035spider_net_workaround_rxramfull(struct spider_net_card *card)
2036{
2037 int i, sequencer = 0;
2038
2039 /* cancel reset */
2040 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2041 SPIDER_NET_CKRCTRL_RUN_VALUE);
2042
2043 /* empty sequencer data */
Arnd Bergmann11f1a522006-01-12 17:16:44 -05002044 for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
2045 sequencer++) {
Jens Osterkampee962a52006-07-13 11:54:23 +02002046 spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002047 sequencer * 8, 0x0);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05002048 for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002049 spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
2050 sequencer * 8, 0x0);
2051 }
2052 }
2053
2054 /* set sequencer operation */
2055 spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
2056
2057 /* reset */
2058 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2059 SPIDER_NET_CKRCTRL_STOP_VALUE);
2060}
2061
2062/**
Jens Osterkampbdd01502006-07-13 11:54:08 +02002063 * spider_net_stop - called upon ifconfig down
2064 * @netdev: interface device structure
2065 *
2066 * always returns 0
2067 */
2068int
2069spider_net_stop(struct net_device *netdev)
2070{
2071 struct spider_net_card *card = netdev_priv(netdev);
2072
Jens Osterkampbdd01502006-07-13 11:54:08 +02002073 netif_poll_disable(netdev);
2074 netif_carrier_off(netdev);
2075 netif_stop_queue(netdev);
2076 del_timer_sync(&card->tx_timer);
Kou Ishizakiabdb66b2007-02-20 16:33:41 -06002077 del_timer_sync(&card->aneg_timer);
Jens Osterkampbdd01502006-07-13 11:54:08 +02002078
2079 /* disable/mask all interrupts */
2080 spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
2081 spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
2082 spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
Kou Ishizakiabdb66b2007-02-20 16:33:41 -06002083 spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
Jens Osterkampbdd01502006-07-13 11:54:08 +02002084
Linas Vepstasd406eaf2007-02-20 16:32:00 -06002085 free_irq(netdev->irq, netdev);
Jens Osterkampbdd01502006-07-13 11:54:08 +02002086
2087 spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
2088 SPIDER_NET_DMA_TX_FEND_VALUE);
2089
2090 /* turn off DMA, force end */
2091 spider_net_disable_rxdmac(card);
2092
2093 /* release chains */
Linas Vepstas9cc7bf72006-10-10 16:14:29 -05002094 spider_net_release_tx_chain(card, 1);
Linas Vepstasd4ed8f82006-12-13 15:06:59 -06002095 spider_net_free_rx_chain_contents(card);
Jens Osterkampbdd01502006-07-13 11:54:08 +02002096
2097 spider_net_free_chain(card, &card->tx_chain);
2098 spider_net_free_chain(card, &card->rx_chain);
2099
2100 return 0;
2101}
2102
2103/**
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002104 * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
2105 * function (to be called not under interrupt status)
2106 * @data: data, is interface device structure
2107 *
2108 * called as task when tx hangs, resets interface (if interface is up)
2109 */
2110static void
David Howellsc4028952006-11-22 14:57:56 +00002111spider_net_tx_timeout_task(struct work_struct *work)
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002112{
David Howellsc4028952006-11-22 14:57:56 +00002113 struct spider_net_card *card =
2114 container_of(work, struct spider_net_card, tx_timeout_task);
2115 struct net_device *netdev = card->netdev;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002116
2117 if (!(netdev->flags & IFF_UP))
2118 goto out;
2119
2120 netif_device_detach(netdev);
2121 spider_net_stop(netdev);
2122
2123 spider_net_workaround_rxramfull(card);
2124 spider_net_init_card(card);
2125
2126 if (spider_net_setup_phy(card))
2127 goto out;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002128
2129 spider_net_open(netdev);
Jens Osterkampbdd01502006-07-13 11:54:08 +02002130 spider_net_kick_tx_dma(card);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002131 netif_device_attach(netdev);
2132
2133out:
2134 atomic_dec(&card->tx_timeout_task_counter);
2135}
2136
2137/**
2138 * spider_net_tx_timeout - called when the tx timeout watchdog kicks in.
2139 * @netdev: interface device structure
2140 *
2141 * called, if tx hangs. Schedules a task that resets the interface
2142 */
2143static void
2144spider_net_tx_timeout(struct net_device *netdev)
2145{
2146 struct spider_net_card *card;
2147
2148 card = netdev_priv(netdev);
2149 atomic_inc(&card->tx_timeout_task_counter);
2150 if (netdev->flags & IFF_UP)
2151 schedule_work(&card->tx_timeout_task);
2152 else
2153 atomic_dec(&card->tx_timeout_task_counter);
Jim Lewis9b6b0b82006-09-22 17:22:53 -07002154 card->spider_stats.tx_timeouts++;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002155}
2156
2157/**
2158 * spider_net_setup_netdev_ops - initialization of net_device operations
2159 * @netdev: net_device structure
2160 *
2161 * fills out function pointers in the net_device structure
2162 */
2163static void
2164spider_net_setup_netdev_ops(struct net_device *netdev)
2165{
2166 netdev->open = &spider_net_open;
2167 netdev->stop = &spider_net_stop;
2168 netdev->hard_start_xmit = &spider_net_xmit;
2169 netdev->get_stats = &spider_net_get_stats;
2170 netdev->set_multicast_list = &spider_net_set_multi;
2171 netdev->set_mac_address = &spider_net_set_mac;
2172 netdev->change_mtu = &spider_net_change_mtu;
2173 netdev->do_ioctl = &spider_net_do_ioctl;
2174 /* tx watchdog */
2175 netdev->tx_timeout = &spider_net_tx_timeout;
2176 netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
2177 /* NAPI */
2178 netdev->poll = &spider_net_poll;
2179 netdev->weight = SPIDER_NET_NAPI_WEIGHT;
2180 /* HW VLAN */
2181 netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
2182 netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
2183 netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
2184#ifdef CONFIG_NET_POLL_CONTROLLER
2185 /* poll controller */
2186 netdev->poll_controller = &spider_net_poll_controller;
2187#endif /* CONFIG_NET_POLL_CONTROLLER */
2188 /* ethtool ops */
2189 netdev->ethtool_ops = &spider_net_ethtool_ops;
2190}
2191
2192/**
2193 * spider_net_setup_netdev - initialization of net_device
2194 * @card: card structure
2195 *
2196 * Returns 0 on success or <0 on failure
2197 *
2198 * spider_net_setup_netdev initializes the net_device structure
2199 **/
2200static int
2201spider_net_setup_netdev(struct spider_net_card *card)
2202{
2203 int result;
2204 struct net_device *netdev = card->netdev;
2205 struct device_node *dn;
2206 struct sockaddr addr;
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10002207 const u8 *mac;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002208
2209 SET_MODULE_OWNER(netdev);
2210 SET_NETDEV_DEV(netdev, &card->pdev->dev);
2211
2212 pci_set_drvdata(card->pdev, netdev);
Arnd Bergmann11f1a522006-01-12 17:16:44 -05002213
Arnd Bergmann11f1a522006-01-12 17:16:44 -05002214 init_timer(&card->tx_timer);
2215 card->tx_timer.function =
2216 (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
2217 card->tx_timer.data = (unsigned long) card;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002218 netdev->irq = card->pdev->irq;
2219
Kou Ishizakiabdb66b2007-02-20 16:33:41 -06002220 card->aneg_count = 0;
2221 init_timer(&card->aneg_timer);
2222 card->aneg_timer.function = spider_net_link_phy;
2223 card->aneg_timer.data = (unsigned long) card;
2224
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002225 card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
2226
2227 spider_net_setup_netdev_ops(netdev);
2228
Jens Osterkampbdd01502006-07-13 11:54:08 +02002229 netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002230 /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2231 * NETIF_F_HW_VLAN_FILTER */
2232
2233 netdev->irq = card->pdev->irq;
2234
2235 dn = pci_device_to_OF_node(card->pdev);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002236 if (!dn)
2237 return -EIO;
2238
Jeremy Kerr1a2509c2006-07-12 15:41:03 +10002239 mac = get_property(dn, "local-mac-address", NULL);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002240 if (!mac)
2241 return -EIO;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002242 memcpy(addr.sa_data, mac, ETH_ALEN);
2243
2244 result = spider_net_set_mac(netdev, &addr);
2245 if ((result) && (netif_msg_probe(card)))
2246 pr_err("Failed to set MAC address: %i\n", result);
2247
2248 result = register_netdev(netdev);
2249 if (result) {
2250 if (netif_msg_probe(card))
2251 pr_err("Couldn't register net_device: %i\n",
2252 result);
2253 return result;
2254 }
2255
2256 if (netif_msg_probe(card))
2257 pr_info("Initialized device %s.\n", netdev->name);
2258
2259 return 0;
2260}
2261
2262/**
2263 * spider_net_alloc_card - allocates net_device and card structure
2264 *
2265 * returns the card structure or NULL in case of errors
2266 *
2267 * the card and net_device structures are linked to each other
2268 */
2269static struct spider_net_card *
2270spider_net_alloc_card(void)
2271{
2272 struct net_device *netdev;
2273 struct spider_net_card *card;
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06002274 size_t alloc_size;
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002275
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06002276 alloc_size = sizeof(struct spider_net_card) +
2277 (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr);
2278 netdev = alloc_etherdev(alloc_size);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002279 if (!netdev)
2280 return NULL;
2281
2282 card = netdev_priv(netdev);
2283 card->netdev = netdev;
2284 card->msg_enable = SPIDER_NET_DEFAULT_MSG;
David Howellsc4028952006-11-22 14:57:56 +00002285 INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002286 init_waitqueue_head(&card->waitq);
2287 atomic_set(&card->tx_timeout_task_counter, 0);
2288
Linas Vepstas4cb6f9e2007-02-20 16:40:06 -06002289 card->rx_chain.num_desc = rx_descriptors;
2290 card->rx_chain.ring = card->darray;
2291 card->tx_chain.num_desc = tx_descriptors;
2292 card->tx_chain.ring = card->darray + rx_descriptors;
2293
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002294 return card;
2295}
2296
2297/**
2298 * spider_net_undo_pci_setup - releases PCI ressources
2299 * @card: card structure
2300 *
2301 * spider_net_undo_pci_setup releases the mapped regions
2302 */
2303static void
2304spider_net_undo_pci_setup(struct spider_net_card *card)
2305{
2306 iounmap(card->regs);
2307 pci_release_regions(card->pdev);
2308}
2309
2310/**
2311 * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
2312 * @card: card structure
2313 * @pdev: PCI device
2314 *
2315 * Returns the card structure or NULL if any errors occur
2316 *
2317 * spider_net_setup_pci_dev initializes pdev and together with the
2318 * functions called in spider_net_open configures the device so that
2319 * data can be transferred over it
2320 * The net_device structure is attached to the card structure, if the
2321 * function returns without error.
2322 **/
2323static struct spider_net_card *
2324spider_net_setup_pci_dev(struct pci_dev *pdev)
2325{
2326 struct spider_net_card *card;
2327 unsigned long mmio_start, mmio_len;
2328
2329 if (pci_enable_device(pdev)) {
2330 pr_err("Couldn't enable PCI device\n");
2331 return NULL;
2332 }
2333
2334 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2335 pr_err("Couldn't find proper PCI device base address.\n");
2336 goto out_disable_dev;
2337 }
2338
2339 if (pci_request_regions(pdev, spider_net_driver_name)) {
2340 pr_err("Couldn't obtain PCI resources, aborting.\n");
2341 goto out_disable_dev;
2342 }
2343
2344 pci_set_master(pdev);
2345
2346 card = spider_net_alloc_card();
2347 if (!card) {
2348 pr_err("Couldn't allocate net_device structure, "
2349 "aborting.\n");
2350 goto out_release_regions;
2351 }
2352 card->pdev = pdev;
2353
2354 /* fetch base address and length of first resource */
2355 mmio_start = pci_resource_start(pdev, 0);
2356 mmio_len = pci_resource_len(pdev, 0);
2357
2358 card->netdev->mem_start = mmio_start;
2359 card->netdev->mem_end = mmio_start + mmio_len;
2360 card->regs = ioremap(mmio_start, mmio_len);
2361
2362 if (!card->regs) {
2363 pr_err("Couldn't obtain PCI resources, aborting.\n");
2364 goto out_release_regions;
2365 }
2366
2367 return card;
2368
2369out_release_regions:
2370 pci_release_regions(pdev);
2371out_disable_dev:
2372 pci_disable_device(pdev);
2373 pci_set_drvdata(pdev, NULL);
2374 return NULL;
2375}
2376
2377/**
2378 * spider_net_probe - initialization of a device
2379 * @pdev: PCI device
2380 * @ent: entry in the device id list
2381 *
2382 * Returns 0 on success, <0 on failure
2383 *
2384 * spider_net_probe initializes pdev and registers a net_device
2385 * structure for it. After that, the device can be ifconfig'ed up
2386 **/
2387static int __devinit
2388spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2389{
2390 int err = -EIO;
2391 struct spider_net_card *card;
2392
2393 card = spider_net_setup_pci_dev(pdev);
2394 if (!card)
2395 goto out;
2396
2397 spider_net_workaround_rxramfull(card);
2398 spider_net_init_card(card);
2399
2400 err = spider_net_setup_phy(card);
2401 if (err)
2402 goto out_undo_pci;
2403
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002404 err = spider_net_setup_netdev(card);
2405 if (err)
2406 goto out_undo_pci;
2407
2408 return 0;
2409
2410out_undo_pci:
2411 spider_net_undo_pci_setup(card);
2412 free_netdev(card->netdev);
2413out:
2414 return err;
2415}
2416
2417/**
2418 * spider_net_remove - removal of a device
2419 * @pdev: PCI device
2420 *
2421 * Returns 0 on success, <0 on failure
2422 *
2423 * spider_net_remove is called to remove the device and unregisters the
2424 * net_device
2425 **/
2426static void __devexit
2427spider_net_remove(struct pci_dev *pdev)
2428{
2429 struct net_device *netdev;
2430 struct spider_net_card *card;
2431
2432 netdev = pci_get_drvdata(pdev);
2433 card = netdev_priv(netdev);
2434
2435 wait_event(card->waitq,
2436 atomic_read(&card->tx_timeout_task_counter) == 0);
2437
2438 unregister_netdev(netdev);
Jens Osterkamp543cec52005-09-06 19:30:54 -07002439
2440 /* switch off card */
2441 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2442 SPIDER_NET_CKRCTRL_STOP_VALUE);
2443 spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
2444 SPIDER_NET_CKRCTRL_RUN_VALUE);
2445
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002446 spider_net_undo_pci_setup(card);
2447 free_netdev(netdev);
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002448}
2449
2450static struct pci_driver spider_net_driver = {
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002451 .name = spider_net_driver_name,
2452 .id_table = spider_net_pci_tbl,
2453 .probe = spider_net_probe,
2454 .remove = __devexit_p(spider_net_remove)
2455};
2456
2457/**
2458 * spider_net_init - init function when the driver is loaded
2459 *
2460 * spider_net_init registers the device driver
2461 */
2462static int __init spider_net_init(void)
2463{
Linas Vepstas90f10842006-10-10 15:56:04 -05002464 printk(KERN_INFO "Spidernet version %s.\n", VERSION);
2465
Jens Osterkampaaec0fa2005-09-05 15:19:29 -07002466 if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
2467 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
2468 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2469 }
2470 if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
2471 rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
2472 pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
2473 }
2474 if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
2475 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
2476 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2477 }
2478 if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
2479 tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
2480 pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
2481 }
2482
2483 return pci_register_driver(&spider_net_driver);
2484}
2485
2486/**
2487 * spider_net_cleanup - exit function when driver is unloaded
2488 *
2489 * spider_net_cleanup unregisters the device driver
2490 */
2491static void __exit spider_net_cleanup(void)
2492{
2493 pci_unregister_driver(&spider_net_driver);
2494}
2495
2496module_init(spider_net_init);
2497module_exit(spider_net_cleanup);