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Auke Kok9d5c8242008-01-24 02:22:38 -08001/*******************************************************************************
2
3 Intel(R) Gigabit Ethernet Linux driver
4 Copyright(c) 2007 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/init.h>
31#include <linux/vmalloc.h>
32#include <linux/pagemap.h>
33#include <linux/netdevice.h>
Auke Kok9d5c8242008-01-24 02:22:38 -080034#include <linux/ipv6.h>
35#include <net/checksum.h>
36#include <net/ip6_checksum.h>
37#include <linux/mii.h>
38#include <linux/ethtool.h>
39#include <linux/if_vlan.h>
40#include <linux/pci.h>
Alexander Duyckc54106b2008-10-16 21:26:57 -070041#include <linux/pci-aspm.h>
Auke Kok9d5c8242008-01-24 02:22:38 -080042#include <linux/delay.h>
43#include <linux/interrupt.h>
44#include <linux/if_ether.h>
Alexander Duyck40a914f2008-11-27 00:24:37 -080045#include <linux/aer.h>
Jeff Kirsher421e02f2008-10-17 11:08:31 -070046#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -070047#include <linux/dca.h>
48#endif
Auke Kok9d5c8242008-01-24 02:22:38 -080049#include "igb.h"
50
Auke Kok0024fd02008-07-08 15:09:37 -070051#define DRV_VERSION "1.2.45-k2"
Auke Kok9d5c8242008-01-24 02:22:38 -080052char igb_driver_name[] = "igb";
53char igb_driver_version[] = DRV_VERSION;
54static const char igb_driver_string[] =
55 "Intel(R) Gigabit Ethernet Network Driver";
Alexander Duyck2d064c02008-07-08 15:10:12 -070056static const char igb_copyright[] = "Copyright (c) 2008 Intel Corporation.";
Auke Kok9d5c8242008-01-24 02:22:38 -080057
Auke Kok9d5c8242008-01-24 02:22:38 -080058static const struct e1000_info *igb_info_tbl[] = {
59 [board_82575] = &e1000_82575_info,
60};
61
62static struct pci_device_id igb_pci_tbl[] = {
Alexander Duyck2d064c02008-07-08 15:10:12 -070063 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576), board_82575 },
64 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER), board_82575 },
65 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES), board_82575 },
Auke Kok9d5c8242008-01-24 02:22:38 -080066 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 },
67 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 },
68 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 },
69 /* required last entry */
70 {0, }
71};
72
73MODULE_DEVICE_TABLE(pci, igb_pci_tbl);
74
75void igb_reset(struct igb_adapter *);
76static int igb_setup_all_tx_resources(struct igb_adapter *);
77static int igb_setup_all_rx_resources(struct igb_adapter *);
78static void igb_free_all_tx_resources(struct igb_adapter *);
79static void igb_free_all_rx_resources(struct igb_adapter *);
Auke Kok9d5c8242008-01-24 02:22:38 -080080void igb_update_stats(struct igb_adapter *);
81static int igb_probe(struct pci_dev *, const struct pci_device_id *);
82static void __devexit igb_remove(struct pci_dev *pdev);
83static int igb_sw_init(struct igb_adapter *);
84static int igb_open(struct net_device *);
85static int igb_close(struct net_device *);
86static void igb_configure_tx(struct igb_adapter *);
87static void igb_configure_rx(struct igb_adapter *);
88static void igb_setup_rctl(struct igb_adapter *);
89static void igb_clean_all_tx_rings(struct igb_adapter *);
90static void igb_clean_all_rx_rings(struct igb_adapter *);
Mitch Williams3b644cf2008-06-27 10:59:48 -070091static void igb_clean_tx_ring(struct igb_ring *);
92static void igb_clean_rx_ring(struct igb_ring *);
Auke Kok9d5c8242008-01-24 02:22:38 -080093static void igb_set_multi(struct net_device *);
94static void igb_update_phy_info(unsigned long);
95static void igb_watchdog(unsigned long);
96static void igb_watchdog_task(struct work_struct *);
97static int igb_xmit_frame_ring_adv(struct sk_buff *, struct net_device *,
98 struct igb_ring *);
99static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *);
100static struct net_device_stats *igb_get_stats(struct net_device *);
101static int igb_change_mtu(struct net_device *, int);
102static int igb_set_mac(struct net_device *, void *);
103static irqreturn_t igb_intr(int irq, void *);
104static irqreturn_t igb_intr_msi(int irq, void *);
105static irqreturn_t igb_msix_other(int irq, void *);
106static irqreturn_t igb_msix_rx(int irq, void *);
107static irqreturn_t igb_msix_tx(int irq, void *);
108static int igb_clean_rx_ring_msix(struct napi_struct *, int);
Jeff Kirsher421e02f2008-10-17 11:08:31 -0700109#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -0700110static void igb_update_rx_dca(struct igb_ring *);
111static void igb_update_tx_dca(struct igb_ring *);
112static void igb_setup_dca(struct igb_adapter *);
Jeff Kirsher421e02f2008-10-17 11:08:31 -0700113#endif /* CONFIG_IGB_DCA */
Mitch Williams3b644cf2008-06-27 10:59:48 -0700114static bool igb_clean_tx_irq(struct igb_ring *);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700115static int igb_poll(struct napi_struct *, int);
Mitch Williams3b644cf2008-06-27 10:59:48 -0700116static bool igb_clean_rx_irq_adv(struct igb_ring *, int *, int);
117static void igb_alloc_rx_buffers_adv(struct igb_ring *, int);
Auke Kok9d5c8242008-01-24 02:22:38 -0800118static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
119static void igb_tx_timeout(struct net_device *);
120static void igb_reset_task(struct work_struct *);
121static void igb_vlan_rx_register(struct net_device *, struct vlan_group *);
122static void igb_vlan_rx_add_vid(struct net_device *, u16);
123static void igb_vlan_rx_kill_vid(struct net_device *, u16);
124static void igb_restore_vlan(struct igb_adapter *);
125
126static int igb_suspend(struct pci_dev *, pm_message_t);
127#ifdef CONFIG_PM
128static int igb_resume(struct pci_dev *);
129#endif
130static void igb_shutdown(struct pci_dev *);
Jeff Kirsher421e02f2008-10-17 11:08:31 -0700131#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -0700132static int igb_notify_dca(struct notifier_block *, unsigned long, void *);
133static struct notifier_block dca_notifier = {
134 .notifier_call = igb_notify_dca,
135 .next = NULL,
136 .priority = 0
137};
138#endif
Auke Kok9d5c8242008-01-24 02:22:38 -0800139
140#ifdef CONFIG_NET_POLL_CONTROLLER
141/* for netdump / net console */
142static void igb_netpoll(struct net_device *);
143#endif
144
145static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
146 pci_channel_state_t);
147static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
148static void igb_io_resume(struct pci_dev *);
149
150static struct pci_error_handlers igb_err_handler = {
151 .error_detected = igb_io_error_detected,
152 .slot_reset = igb_io_slot_reset,
153 .resume = igb_io_resume,
154};
155
156
157static struct pci_driver igb_driver = {
158 .name = igb_driver_name,
159 .id_table = igb_pci_tbl,
160 .probe = igb_probe,
161 .remove = __devexit_p(igb_remove),
162#ifdef CONFIG_PM
163 /* Power Managment Hooks */
164 .suspend = igb_suspend,
165 .resume = igb_resume,
166#endif
167 .shutdown = igb_shutdown,
168 .err_handler = &igb_err_handler
169};
170
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700171static int global_quad_port_a; /* global quad port a indication */
172
Auke Kok9d5c8242008-01-24 02:22:38 -0800173MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
174MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
175MODULE_LICENSE("GPL");
176MODULE_VERSION(DRV_VERSION);
177
178#ifdef DEBUG
179/**
180 * igb_get_hw_dev_name - return device name string
181 * used by hardware layer to print debugging information
182 **/
183char *igb_get_hw_dev_name(struct e1000_hw *hw)
184{
185 struct igb_adapter *adapter = hw->back;
186 return adapter->netdev->name;
187}
188#endif
189
190/**
191 * igb_init_module - Driver Registration Routine
192 *
193 * igb_init_module is the first routine called when the driver is
194 * loaded. All it does is register with the PCI subsystem.
195 **/
196static int __init igb_init_module(void)
197{
198 int ret;
199 printk(KERN_INFO "%s - version %s\n",
200 igb_driver_string, igb_driver_version);
201
202 printk(KERN_INFO "%s\n", igb_copyright);
203
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700204 global_quad_port_a = 0;
205
Jeff Kirsher421e02f2008-10-17 11:08:31 -0700206#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -0700207 dca_register_notify(&dca_notifier);
208#endif
Alexander Duyckbbd98fe2009-01-31 00:52:30 -0800209
210 ret = pci_register_driver(&igb_driver);
Auke Kok9d5c8242008-01-24 02:22:38 -0800211 return ret;
212}
213
214module_init(igb_init_module);
215
216/**
217 * igb_exit_module - Driver Exit Cleanup Routine
218 *
219 * igb_exit_module is called just before the driver is removed
220 * from memory.
221 **/
222static void __exit igb_exit_module(void)
223{
Jeff Kirsher421e02f2008-10-17 11:08:31 -0700224#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -0700225 dca_unregister_notify(&dca_notifier);
226#endif
Auke Kok9d5c8242008-01-24 02:22:38 -0800227 pci_unregister_driver(&igb_driver);
228}
229
230module_exit(igb_exit_module);
231
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800232#define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1))
233/**
234 * igb_cache_ring_register - Descriptor ring to register mapping
235 * @adapter: board private structure to initialize
236 *
237 * Once we know the feature-set enabled for the device, we'll cache
238 * the register offset the descriptor ring is assigned to.
239 **/
240static void igb_cache_ring_register(struct igb_adapter *adapter)
241{
242 int i;
243
244 switch (adapter->hw.mac.type) {
245 case e1000_82576:
246 /* The queues are allocated for virtualization such that VF 0
247 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc.
248 * In order to avoid collision we start at the first free queue
249 * and continue consuming queues in the same sequence
250 */
251 for (i = 0; i < adapter->num_rx_queues; i++)
252 adapter->rx_ring[i].reg_idx = Q_IDX_82576(i);
253 for (i = 0; i < adapter->num_tx_queues; i++)
254 adapter->tx_ring[i].reg_idx = Q_IDX_82576(i);
255 break;
256 case e1000_82575:
257 default:
258 for (i = 0; i < adapter->num_rx_queues; i++)
259 adapter->rx_ring[i].reg_idx = i;
260 for (i = 0; i < adapter->num_tx_queues; i++)
261 adapter->tx_ring[i].reg_idx = i;
262 break;
263 }
264}
265
Auke Kok9d5c8242008-01-24 02:22:38 -0800266/**
267 * igb_alloc_queues - Allocate memory for all rings
268 * @adapter: board private structure to initialize
269 *
270 * We allocate one ring per queue at run-time since we don't know the
271 * number of queues at compile-time.
272 **/
273static int igb_alloc_queues(struct igb_adapter *adapter)
274{
275 int i;
276
277 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
278 sizeof(struct igb_ring), GFP_KERNEL);
279 if (!adapter->tx_ring)
280 return -ENOMEM;
281
282 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
283 sizeof(struct igb_ring), GFP_KERNEL);
284 if (!adapter->rx_ring) {
285 kfree(adapter->tx_ring);
286 return -ENOMEM;
287 }
288
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -0700289 adapter->rx_ring->buddy = adapter->tx_ring;
290
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700291 for (i = 0; i < adapter->num_tx_queues; i++) {
292 struct igb_ring *ring = &(adapter->tx_ring[i]);
Alexander Duyck68fd9912008-11-20 00:48:10 -0800293 ring->count = adapter->tx_ring_count;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700294 ring->adapter = adapter;
295 ring->queue_index = i;
296 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800297 for (i = 0; i < adapter->num_rx_queues; i++) {
298 struct igb_ring *ring = &(adapter->rx_ring[i]);
Alexander Duyck68fd9912008-11-20 00:48:10 -0800299 ring->count = adapter->rx_ring_count;
Auke Kok9d5c8242008-01-24 02:22:38 -0800300 ring->adapter = adapter;
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700301 ring->queue_index = i;
Auke Kok9d5c8242008-01-24 02:22:38 -0800302 ring->itr_register = E1000_ITR;
303
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700304 /* set a default napi handler for each rx_ring */
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700305 netif_napi_add(adapter->netdev, &ring->napi, igb_poll, 64);
Auke Kok9d5c8242008-01-24 02:22:38 -0800306 }
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800307
308 igb_cache_ring_register(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -0800309 return 0;
310}
311
Alexander Duycka88f10e2008-07-08 15:13:38 -0700312static void igb_free_queues(struct igb_adapter *adapter)
313{
314 int i;
315
316 for (i = 0; i < adapter->num_rx_queues; i++)
317 netif_napi_del(&adapter->rx_ring[i].napi);
318
319 kfree(adapter->tx_ring);
320 kfree(adapter->rx_ring);
321}
322
Auke Kok9d5c8242008-01-24 02:22:38 -0800323#define IGB_N0_QUEUE -1
324static void igb_assign_vector(struct igb_adapter *adapter, int rx_queue,
325 int tx_queue, int msix_vector)
326{
327 u32 msixbm = 0;
328 struct e1000_hw *hw = &adapter->hw;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700329 u32 ivar, index;
330
331 switch (hw->mac.type) {
332 case e1000_82575:
Auke Kok9d5c8242008-01-24 02:22:38 -0800333 /* The 82575 assigns vectors using a bitmask, which matches the
334 bitmask for the EICR/EIMS/EIMC registers. To assign one
335 or more queues to a vector, we write the appropriate bits
336 into the MSIXBM register for that vector. */
337 if (rx_queue > IGB_N0_QUEUE) {
338 msixbm = E1000_EICR_RX_QUEUE0 << rx_queue;
339 adapter->rx_ring[rx_queue].eims_value = msixbm;
340 }
341 if (tx_queue > IGB_N0_QUEUE) {
342 msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue;
343 adapter->tx_ring[tx_queue].eims_value =
344 E1000_EICR_TX_QUEUE0 << tx_queue;
345 }
346 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm);
Alexander Duyck2d064c02008-07-08 15:10:12 -0700347 break;
348 case e1000_82576:
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800349 /* 82576 uses a table-based method for assigning vectors.
Alexander Duyck2d064c02008-07-08 15:10:12 -0700350 Each queue has a single entry in the table to which we write
351 a vector number along with a "valid" bit. Sadly, the layout
352 of the table is somewhat counterintuitive. */
353 if (rx_queue > IGB_N0_QUEUE) {
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800354 index = (rx_queue >> 1);
Alexander Duyck2d064c02008-07-08 15:10:12 -0700355 ivar = array_rd32(E1000_IVAR0, index);
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800356 if (rx_queue & 0x1) {
Alexander Duyck2d064c02008-07-08 15:10:12 -0700357 /* vector goes into third byte of register */
358 ivar = ivar & 0xFF00FFFF;
359 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800360 } else {
361 /* vector goes into low byte of register */
362 ivar = ivar & 0xFFFFFF00;
363 ivar |= msix_vector | E1000_IVAR_VALID;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700364 }
365 adapter->rx_ring[rx_queue].eims_value= 1 << msix_vector;
366 array_wr32(E1000_IVAR0, index, ivar);
367 }
368 if (tx_queue > IGB_N0_QUEUE) {
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800369 index = (tx_queue >> 1);
Alexander Duyck2d064c02008-07-08 15:10:12 -0700370 ivar = array_rd32(E1000_IVAR0, index);
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800371 if (tx_queue & 0x1) {
Alexander Duyck2d064c02008-07-08 15:10:12 -0700372 /* vector goes into high byte of register */
373 ivar = ivar & 0x00FFFFFF;
374 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
Alexander Duyck26bc19e2008-12-26 01:34:11 -0800375 } else {
376 /* vector goes into second byte of register */
377 ivar = ivar & 0xFFFF00FF;
378 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700379 }
380 adapter->tx_ring[tx_queue].eims_value= 1 << msix_vector;
381 array_wr32(E1000_IVAR0, index, ivar);
382 }
383 break;
384 default:
385 BUG();
386 break;
387 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800388}
389
390/**
391 * igb_configure_msix - Configure MSI-X hardware
392 *
393 * igb_configure_msix sets up the hardware to properly
394 * generate MSI-X interrupts.
395 **/
396static void igb_configure_msix(struct igb_adapter *adapter)
397{
398 u32 tmp;
399 int i, vector = 0;
400 struct e1000_hw *hw = &adapter->hw;
401
402 adapter->eims_enable_mask = 0;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700403 if (hw->mac.type == e1000_82576)
404 /* Turn on MSI-X capability first, or our settings
405 * won't stick. And it will take days to debug. */
406 wr32(E1000_GPIE, E1000_GPIE_MSIX_MODE |
407 E1000_GPIE_PBA | E1000_GPIE_EIAME |
408 E1000_GPIE_NSICR);
Auke Kok9d5c8242008-01-24 02:22:38 -0800409
410 for (i = 0; i < adapter->num_tx_queues; i++) {
411 struct igb_ring *tx_ring = &adapter->tx_ring[i];
412 igb_assign_vector(adapter, IGB_N0_QUEUE, i, vector++);
413 adapter->eims_enable_mask |= tx_ring->eims_value;
414 if (tx_ring->itr_val)
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -0700415 writel(tx_ring->itr_val,
Auke Kok9d5c8242008-01-24 02:22:38 -0800416 hw->hw_addr + tx_ring->itr_register);
417 else
418 writel(1, hw->hw_addr + tx_ring->itr_register);
419 }
420
421 for (i = 0; i < adapter->num_rx_queues; i++) {
422 struct igb_ring *rx_ring = &adapter->rx_ring[i];
Harvey Harrison25ac3c22008-07-16 12:45:27 -0700423 rx_ring->buddy = NULL;
Auke Kok9d5c8242008-01-24 02:22:38 -0800424 igb_assign_vector(adapter, i, IGB_N0_QUEUE, vector++);
425 adapter->eims_enable_mask |= rx_ring->eims_value;
426 if (rx_ring->itr_val)
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -0700427 writel(rx_ring->itr_val,
Auke Kok9d5c8242008-01-24 02:22:38 -0800428 hw->hw_addr + rx_ring->itr_register);
429 else
430 writel(1, hw->hw_addr + rx_ring->itr_register);
431 }
432
433
434 /* set vector for other causes, i.e. link changes */
Alexander Duyck2d064c02008-07-08 15:10:12 -0700435 switch (hw->mac.type) {
436 case e1000_82575:
Auke Kok9d5c8242008-01-24 02:22:38 -0800437 array_wr32(E1000_MSIXBM(0), vector++,
438 E1000_EIMS_OTHER);
439
Auke Kok9d5c8242008-01-24 02:22:38 -0800440 tmp = rd32(E1000_CTRL_EXT);
441 /* enable MSI-X PBA support*/
442 tmp |= E1000_CTRL_EXT_PBA_CLR;
443
444 /* Auto-Mask interrupts upon ICR read. */
445 tmp |= E1000_CTRL_EXT_EIAME;
446 tmp |= E1000_CTRL_EXT_IRCA;
447
448 wr32(E1000_CTRL_EXT, tmp);
449 adapter->eims_enable_mask |= E1000_EIMS_OTHER;
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700450 adapter->eims_other = E1000_EIMS_OTHER;
Auke Kok9d5c8242008-01-24 02:22:38 -0800451
Alexander Duyck2d064c02008-07-08 15:10:12 -0700452 break;
453
454 case e1000_82576:
455 tmp = (vector++ | E1000_IVAR_VALID) << 8;
456 wr32(E1000_IVAR_MISC, tmp);
457
458 adapter->eims_enable_mask = (1 << (vector)) - 1;
459 adapter->eims_other = 1 << (vector - 1);
460 break;
461 default:
462 /* do nothing, since nothing else supports MSI-X */
463 break;
464 } /* switch (hw->mac.type) */
Auke Kok9d5c8242008-01-24 02:22:38 -0800465 wrfl();
466}
467
468/**
469 * igb_request_msix - Initialize MSI-X interrupts
470 *
471 * igb_request_msix allocates MSI-X vectors and requests interrupts from the
472 * kernel.
473 **/
474static int igb_request_msix(struct igb_adapter *adapter)
475{
476 struct net_device *netdev = adapter->netdev;
477 int i, err = 0, vector = 0;
478
479 vector = 0;
480
481 for (i = 0; i < adapter->num_tx_queues; i++) {
482 struct igb_ring *ring = &(adapter->tx_ring[i]);
Alexander Duyckcb7b48f2008-12-05 15:08:03 -0800483 sprintf(ring->name, "%s-tx-%d", netdev->name, i);
Auke Kok9d5c8242008-01-24 02:22:38 -0800484 err = request_irq(adapter->msix_entries[vector].vector,
485 &igb_msix_tx, 0, ring->name,
486 &(adapter->tx_ring[i]));
487 if (err)
488 goto out;
489 ring->itr_register = E1000_EITR(0) + (vector << 2);
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -0700490 ring->itr_val = 976; /* ~4000 ints/sec */
Auke Kok9d5c8242008-01-24 02:22:38 -0800491 vector++;
492 }
493 for (i = 0; i < adapter->num_rx_queues; i++) {
494 struct igb_ring *ring = &(adapter->rx_ring[i]);
495 if (strlen(netdev->name) < (IFNAMSIZ - 5))
Alexander Duyckcb7b48f2008-12-05 15:08:03 -0800496 sprintf(ring->name, "%s-rx-%d", netdev->name, i);
Auke Kok9d5c8242008-01-24 02:22:38 -0800497 else
498 memcpy(ring->name, netdev->name, IFNAMSIZ);
499 err = request_irq(adapter->msix_entries[vector].vector,
500 &igb_msix_rx, 0, ring->name,
501 &(adapter->rx_ring[i]));
502 if (err)
503 goto out;
504 ring->itr_register = E1000_EITR(0) + (vector << 2);
505 ring->itr_val = adapter->itr;
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700506 /* overwrite the poll routine for MSIX, we've already done
507 * netif_napi_add */
508 ring->napi.poll = &igb_clean_rx_ring_msix;
Auke Kok9d5c8242008-01-24 02:22:38 -0800509 vector++;
510 }
511
512 err = request_irq(adapter->msix_entries[vector].vector,
513 &igb_msix_other, 0, netdev->name, netdev);
514 if (err)
515 goto out;
516
Auke Kok9d5c8242008-01-24 02:22:38 -0800517 igb_configure_msix(adapter);
518 return 0;
519out:
520 return err;
521}
522
523static void igb_reset_interrupt_capability(struct igb_adapter *adapter)
524{
525 if (adapter->msix_entries) {
526 pci_disable_msix(adapter->pdev);
527 kfree(adapter->msix_entries);
528 adapter->msix_entries = NULL;
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700529 } else if (adapter->flags & IGB_FLAG_HAS_MSI)
Auke Kok9d5c8242008-01-24 02:22:38 -0800530 pci_disable_msi(adapter->pdev);
531 return;
532}
533
534
535/**
536 * igb_set_interrupt_capability - set MSI or MSI-X if supported
537 *
538 * Attempt to configure interrupts using the best available
539 * capabilities of the hardware and kernel.
540 **/
541static void igb_set_interrupt_capability(struct igb_adapter *adapter)
542{
543 int err;
544 int numvecs, i;
545
Alexander Duyck83b71802009-02-06 23:15:45 +0000546 /* Number of supported queues. */
547 /* Having more queues than CPUs doesn't make sense. */
548 adapter->num_rx_queues = min_t(u32, IGB_MAX_RX_QUEUES, num_online_cpus());
549 adapter->num_tx_queues = min_t(u32, IGB_MAX_TX_QUEUES, num_online_cpus());
550
Auke Kok9d5c8242008-01-24 02:22:38 -0800551 numvecs = adapter->num_tx_queues + adapter->num_rx_queues + 1;
552 adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry),
553 GFP_KERNEL);
554 if (!adapter->msix_entries)
555 goto msi_only;
556
557 for (i = 0; i < numvecs; i++)
558 adapter->msix_entries[i].entry = i;
559
560 err = pci_enable_msix(adapter->pdev,
561 adapter->msix_entries,
562 numvecs);
563 if (err == 0)
Alexander Duyck34a20e82008-08-26 04:25:13 -0700564 goto out;
Auke Kok9d5c8242008-01-24 02:22:38 -0800565
566 igb_reset_interrupt_capability(adapter);
567
568 /* If we can't do MSI-X, try MSI */
569msi_only:
570 adapter->num_rx_queues = 1;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700571 adapter->num_tx_queues = 1;
Auke Kok9d5c8242008-01-24 02:22:38 -0800572 if (!pci_enable_msi(adapter->pdev))
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700573 adapter->flags |= IGB_FLAG_HAS_MSI;
Alexander Duyck34a20e82008-08-26 04:25:13 -0700574out:
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -0700575 /* Notify the stack of the (possibly) reduced Tx Queue count. */
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700576 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
Auke Kok9d5c8242008-01-24 02:22:38 -0800577 return;
578}
579
580/**
581 * igb_request_irq - initialize interrupts
582 *
583 * Attempts to configure interrupts using the best available
584 * capabilities of the hardware and kernel.
585 **/
586static int igb_request_irq(struct igb_adapter *adapter)
587{
588 struct net_device *netdev = adapter->netdev;
589 struct e1000_hw *hw = &adapter->hw;
590 int err = 0;
591
592 if (adapter->msix_entries) {
593 err = igb_request_msix(adapter);
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700594 if (!err)
Auke Kok9d5c8242008-01-24 02:22:38 -0800595 goto request_done;
Auke Kok9d5c8242008-01-24 02:22:38 -0800596 /* fall back to MSI */
597 igb_reset_interrupt_capability(adapter);
598 if (!pci_enable_msi(adapter->pdev))
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700599 adapter->flags |= IGB_FLAG_HAS_MSI;
Auke Kok9d5c8242008-01-24 02:22:38 -0800600 igb_free_all_tx_resources(adapter);
601 igb_free_all_rx_resources(adapter);
602 adapter->num_rx_queues = 1;
603 igb_alloc_queues(adapter);
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700604 } else {
Alexander Duyck2d064c02008-07-08 15:10:12 -0700605 switch (hw->mac.type) {
606 case e1000_82575:
607 wr32(E1000_MSIXBM(0),
608 (E1000_EICR_RX_QUEUE0 | E1000_EIMS_OTHER));
609 break;
610 case e1000_82576:
611 wr32(E1000_IVAR0, E1000_IVAR_VALID);
612 break;
613 default:
614 break;
615 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800616 }
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700617
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700618 if (adapter->flags & IGB_FLAG_HAS_MSI) {
Auke Kok9d5c8242008-01-24 02:22:38 -0800619 err = request_irq(adapter->pdev->irq, &igb_intr_msi, 0,
620 netdev->name, netdev);
621 if (!err)
622 goto request_done;
623 /* fall back to legacy interrupts */
624 igb_reset_interrupt_capability(adapter);
Alexander Duyck7dfc16f2008-07-08 15:10:46 -0700625 adapter->flags &= ~IGB_FLAG_HAS_MSI;
Auke Kok9d5c8242008-01-24 02:22:38 -0800626 }
627
628 err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED,
629 netdev->name, netdev);
630
Andy Gospodarek6cb5e572008-02-15 14:05:25 -0800631 if (err)
Auke Kok9d5c8242008-01-24 02:22:38 -0800632 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
633 err);
Auke Kok9d5c8242008-01-24 02:22:38 -0800634
635request_done:
636 return err;
637}
638
639static void igb_free_irq(struct igb_adapter *adapter)
640{
641 struct net_device *netdev = adapter->netdev;
642
643 if (adapter->msix_entries) {
644 int vector = 0, i;
645
646 for (i = 0; i < adapter->num_tx_queues; i++)
647 free_irq(adapter->msix_entries[vector++].vector,
648 &(adapter->tx_ring[i]));
649 for (i = 0; i < adapter->num_rx_queues; i++)
650 free_irq(adapter->msix_entries[vector++].vector,
651 &(adapter->rx_ring[i]));
652
653 free_irq(adapter->msix_entries[vector++].vector, netdev);
654 return;
655 }
656
657 free_irq(adapter->pdev->irq, netdev);
658}
659
660/**
661 * igb_irq_disable - Mask off interrupt generation on the NIC
662 * @adapter: board private structure
663 **/
664static void igb_irq_disable(struct igb_adapter *adapter)
665{
666 struct e1000_hw *hw = &adapter->hw;
667
668 if (adapter->msix_entries) {
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700669 wr32(E1000_EIAM, 0);
Auke Kok9d5c8242008-01-24 02:22:38 -0800670 wr32(E1000_EIMC, ~0);
671 wr32(E1000_EIAC, 0);
672 }
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700673
674 wr32(E1000_IAM, 0);
Auke Kok9d5c8242008-01-24 02:22:38 -0800675 wr32(E1000_IMC, ~0);
676 wrfl();
677 synchronize_irq(adapter->pdev->irq);
678}
679
680/**
681 * igb_irq_enable - Enable default interrupt generation settings
682 * @adapter: board private structure
683 **/
684static void igb_irq_enable(struct igb_adapter *adapter)
685{
686 struct e1000_hw *hw = &adapter->hw;
687
688 if (adapter->msix_entries) {
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700689 wr32(E1000_EIAC, adapter->eims_enable_mask);
690 wr32(E1000_EIAM, adapter->eims_enable_mask);
691 wr32(E1000_EIMS, adapter->eims_enable_mask);
Auke Kok9d5c8242008-01-24 02:22:38 -0800692 wr32(E1000_IMS, E1000_IMS_LSC);
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700693 } else {
694 wr32(E1000_IMS, IMS_ENABLE_MASK);
695 wr32(E1000_IAM, IMS_ENABLE_MASK);
696 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800697}
698
699static void igb_update_mng_vlan(struct igb_adapter *adapter)
700{
701 struct net_device *netdev = adapter->netdev;
702 u16 vid = adapter->hw.mng_cookie.vlan_id;
703 u16 old_vid = adapter->mng_vlan_id;
704 if (adapter->vlgrp) {
705 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
706 if (adapter->hw.mng_cookie.status &
707 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
708 igb_vlan_rx_add_vid(netdev, vid);
709 adapter->mng_vlan_id = vid;
710 } else
711 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
712
713 if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
714 (vid != old_vid) &&
715 !vlan_group_get_device(adapter->vlgrp, old_vid))
716 igb_vlan_rx_kill_vid(netdev, old_vid);
717 } else
718 adapter->mng_vlan_id = vid;
719 }
720}
721
722/**
723 * igb_release_hw_control - release control of the h/w to f/w
724 * @adapter: address of board private structure
725 *
726 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
727 * For ASF and Pass Through versions of f/w this means that the
728 * driver is no longer loaded.
729 *
730 **/
731static void igb_release_hw_control(struct igb_adapter *adapter)
732{
733 struct e1000_hw *hw = &adapter->hw;
734 u32 ctrl_ext;
735
736 /* Let firmware take over control of h/w */
737 ctrl_ext = rd32(E1000_CTRL_EXT);
738 wr32(E1000_CTRL_EXT,
739 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
740}
741
742
743/**
744 * igb_get_hw_control - get control of the h/w from f/w
745 * @adapter: address of board private structure
746 *
747 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
748 * For ASF and Pass Through versions of f/w this means that
749 * the driver is loaded.
750 *
751 **/
752static void igb_get_hw_control(struct igb_adapter *adapter)
753{
754 struct e1000_hw *hw = &adapter->hw;
755 u32 ctrl_ext;
756
757 /* Let firmware know the driver has taken over */
758 ctrl_ext = rd32(E1000_CTRL_EXT);
759 wr32(E1000_CTRL_EXT,
760 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
761}
762
Auke Kok9d5c8242008-01-24 02:22:38 -0800763/**
764 * igb_configure - configure the hardware for RX and TX
765 * @adapter: private board structure
766 **/
767static void igb_configure(struct igb_adapter *adapter)
768{
769 struct net_device *netdev = adapter->netdev;
770 int i;
771
772 igb_get_hw_control(adapter);
773 igb_set_multi(netdev);
774
775 igb_restore_vlan(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -0800776
777 igb_configure_tx(adapter);
778 igb_setup_rctl(adapter);
779 igb_configure_rx(adapter);
Alexander Duyck662d7202008-06-27 11:00:29 -0700780
781 igb_rx_fifo_flush_82575(&adapter->hw);
782
Auke Kok9d5c8242008-01-24 02:22:38 -0800783 /* call IGB_DESC_UNUSED which always leaves
784 * at least 1 descriptor unused to make sure
785 * next_to_use != next_to_clean */
786 for (i = 0; i < adapter->num_rx_queues; i++) {
787 struct igb_ring *ring = &adapter->rx_ring[i];
Mitch Williams3b644cf2008-06-27 10:59:48 -0700788 igb_alloc_rx_buffers_adv(ring, IGB_DESC_UNUSED(ring));
Auke Kok9d5c8242008-01-24 02:22:38 -0800789 }
790
791
792 adapter->tx_queue_len = netdev->tx_queue_len;
793}
794
795
796/**
797 * igb_up - Open the interface and prepare it to handle traffic
798 * @adapter: board private structure
799 **/
800
801int igb_up(struct igb_adapter *adapter)
802{
803 struct e1000_hw *hw = &adapter->hw;
804 int i;
805
806 /* hardware has been reset, we need to reload some things */
807 igb_configure(adapter);
808
809 clear_bit(__IGB_DOWN, &adapter->state);
810
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700811 for (i = 0; i < adapter->num_rx_queues; i++)
812 napi_enable(&adapter->rx_ring[i].napi);
813 if (adapter->msix_entries)
Auke Kok9d5c8242008-01-24 02:22:38 -0800814 igb_configure_msix(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -0800815
816 /* Clear any pending interrupts. */
817 rd32(E1000_ICR);
818 igb_irq_enable(adapter);
819
820 /* Fire a link change interrupt to start the watchdog. */
821 wr32(E1000_ICS, E1000_ICS_LSC);
822 return 0;
823}
824
825void igb_down(struct igb_adapter *adapter)
826{
827 struct e1000_hw *hw = &adapter->hw;
828 struct net_device *netdev = adapter->netdev;
829 u32 tctl, rctl;
830 int i;
831
832 /* signal that we're down so the interrupt handler does not
833 * reschedule our watchdog timer */
834 set_bit(__IGB_DOWN, &adapter->state);
835
836 /* disable receives in the hardware */
837 rctl = rd32(E1000_RCTL);
838 wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
839 /* flush and sleep below */
840
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700841 netif_tx_stop_all_queues(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -0800842
843 /* disable transmits in the hardware */
844 tctl = rd32(E1000_TCTL);
845 tctl &= ~E1000_TCTL_EN;
846 wr32(E1000_TCTL, tctl);
847 /* flush both disables and wait for them to finish */
848 wrfl();
849 msleep(10);
850
PJ Waskiewicz844290e2008-06-27 11:00:39 -0700851 for (i = 0; i < adapter->num_rx_queues; i++)
852 napi_disable(&adapter->rx_ring[i].napi);
Auke Kok9d5c8242008-01-24 02:22:38 -0800853
Auke Kok9d5c8242008-01-24 02:22:38 -0800854 igb_irq_disable(adapter);
855
856 del_timer_sync(&adapter->watchdog_timer);
857 del_timer_sync(&adapter->phy_info_timer);
858
859 netdev->tx_queue_len = adapter->tx_queue_len;
860 netif_carrier_off(netdev);
861 adapter->link_speed = 0;
862 adapter->link_duplex = 0;
863
Jeff Kirsher30236822008-06-24 17:01:15 -0700864 if (!pci_channel_offline(adapter->pdev))
865 igb_reset(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -0800866 igb_clean_all_tx_rings(adapter);
867 igb_clean_all_rx_rings(adapter);
868}
869
870void igb_reinit_locked(struct igb_adapter *adapter)
871{
872 WARN_ON(in_interrupt());
873 while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
874 msleep(1);
875 igb_down(adapter);
876 igb_up(adapter);
877 clear_bit(__IGB_RESETTING, &adapter->state);
878}
879
880void igb_reset(struct igb_adapter *adapter)
881{
882 struct e1000_hw *hw = &adapter->hw;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700883 struct e1000_mac_info *mac = &hw->mac;
884 struct e1000_fc_info *fc = &hw->fc;
Auke Kok9d5c8242008-01-24 02:22:38 -0800885 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
886 u16 hwm;
887
888 /* Repartition Pba for greater than 9k mtu
889 * To take effect CTRL.RST is required.
890 */
Alexander Duyck2d064c02008-07-08 15:10:12 -0700891 if (mac->type != e1000_82576) {
Auke Kok9d5c8242008-01-24 02:22:38 -0800892 pba = E1000_PBA_34K;
Alexander Duyck2d064c02008-07-08 15:10:12 -0700893 }
894 else {
895 pba = E1000_PBA_64K;
896 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800897
Alexander Duyck2d064c02008-07-08 15:10:12 -0700898 if ((adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) &&
899 (mac->type < e1000_82576)) {
Auke Kok9d5c8242008-01-24 02:22:38 -0800900 /* adjust PBA for jumbo frames */
901 wr32(E1000_PBA, pba);
902
903 /* To maintain wire speed transmits, the Tx FIFO should be
904 * large enough to accommodate two full transmit packets,
905 * rounded up to the next 1KB and expressed in KB. Likewise,
906 * the Rx FIFO should be large enough to accommodate at least
907 * one full receive packet and is similarly rounded up and
908 * expressed in KB. */
909 pba = rd32(E1000_PBA);
910 /* upper 16 bits has Tx packet buffer allocation size in KB */
911 tx_space = pba >> 16;
912 /* lower 16 bits has Rx packet buffer allocation size in KB */
913 pba &= 0xffff;
914 /* the tx fifo also stores 16 bytes of information about the tx
915 * but don't include ethernet FCS because hardware appends it */
916 min_tx_space = (adapter->max_frame_size +
917 sizeof(struct e1000_tx_desc) -
918 ETH_FCS_LEN) * 2;
919 min_tx_space = ALIGN(min_tx_space, 1024);
920 min_tx_space >>= 10;
921 /* software strips receive CRC, so leave room for it */
922 min_rx_space = adapter->max_frame_size;
923 min_rx_space = ALIGN(min_rx_space, 1024);
924 min_rx_space >>= 10;
925
926 /* If current Tx allocation is less than the min Tx FIFO size,
927 * and the min Tx FIFO size is less than the current Rx FIFO
928 * allocation, take space away from current Rx allocation */
929 if (tx_space < min_tx_space &&
930 ((min_tx_space - tx_space) < pba)) {
931 pba = pba - (min_tx_space - tx_space);
932
933 /* if short on rx space, rx wins and must trump tx
934 * adjustment */
935 if (pba < min_rx_space)
936 pba = min_rx_space;
937 }
Alexander Duyck2d064c02008-07-08 15:10:12 -0700938 wr32(E1000_PBA, pba);
Auke Kok9d5c8242008-01-24 02:22:38 -0800939 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800940
941 /* flow control settings */
942 /* The high water mark must be low enough to fit one full frame
943 * (or the size used for early receive) above it in the Rx FIFO.
944 * Set it to the lower of:
945 * - 90% of the Rx FIFO size, or
946 * - the full Rx FIFO size minus one full frame */
947 hwm = min(((pba << 10) * 9 / 10),
Alexander Duyck2d064c02008-07-08 15:10:12 -0700948 ((pba << 10) - 2 * adapter->max_frame_size));
Auke Kok9d5c8242008-01-24 02:22:38 -0800949
Alexander Duyck2d064c02008-07-08 15:10:12 -0700950 if (mac->type < e1000_82576) {
951 fc->high_water = hwm & 0xFFF8; /* 8-byte granularity */
952 fc->low_water = fc->high_water - 8;
953 } else {
954 fc->high_water = hwm & 0xFFF0; /* 16-byte granularity */
955 fc->low_water = fc->high_water - 16;
956 }
Auke Kok9d5c8242008-01-24 02:22:38 -0800957 fc->pause_time = 0xFFFF;
958 fc->send_xon = 1;
959 fc->type = fc->original_type;
960
961 /* Allow time for pending master requests to run */
962 adapter->hw.mac.ops.reset_hw(&adapter->hw);
963 wr32(E1000_WUC, 0);
964
965 if (adapter->hw.mac.ops.init_hw(&adapter->hw))
966 dev_err(&adapter->pdev->dev, "Hardware Error\n");
967
968 igb_update_mng_vlan(adapter);
969
970 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
971 wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE);
972
973 igb_reset_adaptive(&adapter->hw);
Alexander Duyckf5f4cf02008-11-21 21:30:24 -0800974 igb_get_phy_info(&adapter->hw);
Auke Kok9d5c8242008-01-24 02:22:38 -0800975}
976
Stephen Hemminger2e5c6922008-11-19 22:20:44 -0800977static const struct net_device_ops igb_netdev_ops = {
978 .ndo_open = igb_open,
979 .ndo_stop = igb_close,
Stephen Hemminger00829822008-11-20 20:14:53 -0800980 .ndo_start_xmit = igb_xmit_frame_adv,
Stephen Hemminger2e5c6922008-11-19 22:20:44 -0800981 .ndo_get_stats = igb_get_stats,
982 .ndo_set_multicast_list = igb_set_multi,
983 .ndo_set_mac_address = igb_set_mac,
984 .ndo_change_mtu = igb_change_mtu,
985 .ndo_do_ioctl = igb_ioctl,
986 .ndo_tx_timeout = igb_tx_timeout,
987 .ndo_validate_addr = eth_validate_addr,
988 .ndo_vlan_rx_register = igb_vlan_rx_register,
989 .ndo_vlan_rx_add_vid = igb_vlan_rx_add_vid,
990 .ndo_vlan_rx_kill_vid = igb_vlan_rx_kill_vid,
991#ifdef CONFIG_NET_POLL_CONTROLLER
992 .ndo_poll_controller = igb_netpoll,
993#endif
994};
995
Taku Izumi42bfd33a2008-06-20 12:10:30 +0900996/**
Auke Kok9d5c8242008-01-24 02:22:38 -0800997 * igb_probe - Device Initialization Routine
998 * @pdev: PCI device information struct
999 * @ent: entry in igb_pci_tbl
1000 *
1001 * Returns 0 on success, negative on failure
1002 *
1003 * igb_probe initializes an adapter identified by a pci_dev structure.
1004 * The OS initialization, configuring of the adapter private structure,
1005 * and a hardware reset occur.
1006 **/
1007static int __devinit igb_probe(struct pci_dev *pdev,
1008 const struct pci_device_id *ent)
1009{
1010 struct net_device *netdev;
1011 struct igb_adapter *adapter;
1012 struct e1000_hw *hw;
Alexander Duyckc54106b2008-10-16 21:26:57 -07001013 struct pci_dev *us_dev;
Auke Kok9d5c8242008-01-24 02:22:38 -08001014 const struct e1000_info *ei = igb_info_tbl[ent->driver_data];
1015 unsigned long mmio_start, mmio_len;
Alexander Duyckc54106b2008-10-16 21:26:57 -07001016 int i, err, pci_using_dac, pos;
1017 u16 eeprom_data = 0, state = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08001018 u16 eeprom_apme_mask = IGB_EEPROM_APME;
1019 u32 part_num;
1020
Alexander Duyckaed5dec2009-02-06 23:16:04 +00001021 err = pci_enable_device_mem(pdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08001022 if (err)
1023 return err;
1024
1025 pci_using_dac = 0;
1026 err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
1027 if (!err) {
1028 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1029 if (!err)
1030 pci_using_dac = 1;
1031 } else {
1032 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1033 if (err) {
1034 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1035 if (err) {
1036 dev_err(&pdev->dev, "No usable DMA "
1037 "configuration, aborting\n");
1038 goto err_dma;
1039 }
1040 }
1041 }
1042
Alexander Duyckc54106b2008-10-16 21:26:57 -07001043 /* 82575 requires that the pci-e link partner disable the L0s state */
1044 switch (pdev->device) {
1045 case E1000_DEV_ID_82575EB_COPPER:
1046 case E1000_DEV_ID_82575EB_FIBER_SERDES:
1047 case E1000_DEV_ID_82575GB_QUAD_COPPER:
1048 us_dev = pdev->bus->self;
1049 pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
1050 if (pos) {
1051 pci_read_config_word(us_dev, pos + PCI_EXP_LNKCTL,
1052 &state);
1053 state &= ~PCIE_LINK_STATE_L0S;
1054 pci_write_config_word(us_dev, pos + PCI_EXP_LNKCTL,
1055 state);
Bjorn Helgaasac450202008-11-13 06:20:10 +00001056 dev_info(&pdev->dev,
1057 "Disabling ASPM L0s upstream switch port %s\n",
1058 pci_name(us_dev));
Alexander Duyckc54106b2008-10-16 21:26:57 -07001059 }
1060 default:
1061 break;
1062 }
1063
Alexander Duyckaed5dec2009-02-06 23:16:04 +00001064 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
1065 IORESOURCE_MEM),
1066 igb_driver_name);
Auke Kok9d5c8242008-01-24 02:22:38 -08001067 if (err)
1068 goto err_pci_reg;
1069
Jeff Kirsherea943d42008-12-11 20:34:19 -08001070 err = pci_enable_pcie_error_reporting(pdev);
1071 if (err) {
1072 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
1073 "0x%x\n", err);
1074 /* non-fatal, continue */
1075 }
Alexander Duyck40a914f2008-11-27 00:24:37 -08001076
Auke Kok9d5c8242008-01-24 02:22:38 -08001077 pci_set_master(pdev);
Auke Kokc682fc22008-04-23 11:09:34 -07001078 pci_save_state(pdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08001079
1080 err = -ENOMEM;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07001081 netdev = alloc_etherdev_mq(sizeof(struct igb_adapter), IGB_MAX_TX_QUEUES);
Auke Kok9d5c8242008-01-24 02:22:38 -08001082 if (!netdev)
1083 goto err_alloc_etherdev;
1084
1085 SET_NETDEV_DEV(netdev, &pdev->dev);
1086
1087 pci_set_drvdata(pdev, netdev);
1088 adapter = netdev_priv(netdev);
1089 adapter->netdev = netdev;
1090 adapter->pdev = pdev;
1091 hw = &adapter->hw;
1092 hw->back = adapter;
1093 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;
1094
1095 mmio_start = pci_resource_start(pdev, 0);
1096 mmio_len = pci_resource_len(pdev, 0);
1097
1098 err = -EIO;
1099 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
1100 if (!adapter->hw.hw_addr)
1101 goto err_ioremap;
1102
Stephen Hemminger2e5c6922008-11-19 22:20:44 -08001103 netdev->netdev_ops = &igb_netdev_ops;
Auke Kok9d5c8242008-01-24 02:22:38 -08001104 igb_set_ethtool_ops(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08001105 netdev->watchdog_timeo = 5 * HZ;
Auke Kok9d5c8242008-01-24 02:22:38 -08001106
1107 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1108
1109 netdev->mem_start = mmio_start;
1110 netdev->mem_end = mmio_start + mmio_len;
1111
Auke Kok9d5c8242008-01-24 02:22:38 -08001112 /* PCI config space info */
1113 hw->vendor_id = pdev->vendor;
1114 hw->device_id = pdev->device;
1115 hw->revision_id = pdev->revision;
1116 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1117 hw->subsystem_device_id = pdev->subsystem_device;
1118
1119 /* setup the private structure */
1120 hw->back = adapter;
1121 /* Copy the default MAC, PHY and NVM function pointers */
1122 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
1123 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
1124 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
1125 /* Initialize skew-specific constants */
1126 err = ei->get_invariants(hw);
1127 if (err)
1128 goto err_hw_init;
1129
1130 err = igb_sw_init(adapter);
1131 if (err)
1132 goto err_sw_init;
1133
1134 igb_get_bus_info_pcie(hw);
1135
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001136 /* set flags */
1137 switch (hw->mac.type) {
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001138 case e1000_82575:
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001139 adapter->flags |= IGB_FLAG_NEED_CTX_IDX;
1140 break;
Alexander Duyckbbd98fe2009-01-31 00:52:30 -08001141 case e1000_82576:
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001142 default:
1143 break;
1144 }
1145
Auke Kok9d5c8242008-01-24 02:22:38 -08001146 hw->phy.autoneg_wait_to_complete = false;
1147 hw->mac.adaptive_ifs = true;
1148
1149 /* Copper options */
1150 if (hw->phy.media_type == e1000_media_type_copper) {
1151 hw->phy.mdix = AUTO_ALL_MODES;
1152 hw->phy.disable_polarity_correction = false;
1153 hw->phy.ms_type = e1000_ms_hw_default;
1154 }
1155
1156 if (igb_check_reset_block(hw))
1157 dev_info(&pdev->dev,
1158 "PHY reset is blocked due to SOL/IDER session.\n");
1159
1160 netdev->features = NETIF_F_SG |
1161 NETIF_F_HW_CSUM |
1162 NETIF_F_HW_VLAN_TX |
1163 NETIF_F_HW_VLAN_RX |
1164 NETIF_F_HW_VLAN_FILTER;
1165
1166 netdev->features |= NETIF_F_TSO;
Auke Kok9d5c8242008-01-24 02:22:38 -08001167 netdev->features |= NETIF_F_TSO6;
Jeff Kirsher48f29ff2008-06-05 04:06:27 -07001168
Alexander Duyckd3352522008-07-08 15:12:13 -07001169#ifdef CONFIG_IGB_LRO
Herbert Xu5c0999b2009-01-19 15:20:57 -08001170 netdev->features |= NETIF_F_GRO;
Alexander Duyckd3352522008-07-08 15:12:13 -07001171#endif
1172
Jeff Kirsher48f29ff2008-06-05 04:06:27 -07001173 netdev->vlan_features |= NETIF_F_TSO;
1174 netdev->vlan_features |= NETIF_F_TSO6;
1175 netdev->vlan_features |= NETIF_F_HW_CSUM;
1176 netdev->vlan_features |= NETIF_F_SG;
1177
Auke Kok9d5c8242008-01-24 02:22:38 -08001178 if (pci_using_dac)
1179 netdev->features |= NETIF_F_HIGHDMA;
1180
Auke Kok9d5c8242008-01-24 02:22:38 -08001181 adapter->en_mng_pt = igb_enable_mng_pass_thru(&adapter->hw);
1182
1183 /* before reading the NVM, reset the controller to put the device in a
1184 * known good starting state */
1185 hw->mac.ops.reset_hw(hw);
1186
1187 /* make sure the NVM is good */
1188 if (igb_validate_nvm_checksum(hw) < 0) {
1189 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
1190 err = -EIO;
1191 goto err_eeprom;
1192 }
1193
1194 /* copy the MAC address out of the NVM */
1195 if (hw->mac.ops.read_mac_addr(hw))
1196 dev_err(&pdev->dev, "NVM Read Error\n");
1197
1198 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
1199 memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
1200
1201 if (!is_valid_ether_addr(netdev->perm_addr)) {
1202 dev_err(&pdev->dev, "Invalid MAC Address\n");
1203 err = -EIO;
1204 goto err_eeprom;
1205 }
1206
1207 init_timer(&adapter->watchdog_timer);
1208 adapter->watchdog_timer.function = &igb_watchdog;
1209 adapter->watchdog_timer.data = (unsigned long) adapter;
1210
1211 init_timer(&adapter->phy_info_timer);
1212 adapter->phy_info_timer.function = &igb_update_phy_info;
1213 adapter->phy_info_timer.data = (unsigned long) adapter;
1214
1215 INIT_WORK(&adapter->reset_task, igb_reset_task);
1216 INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
1217
1218 /* Initialize link & ring properties that are user-changeable */
1219 adapter->tx_ring->count = 256;
1220 for (i = 0; i < adapter->num_tx_queues; i++)
1221 adapter->tx_ring[i].count = adapter->tx_ring->count;
1222 adapter->rx_ring->count = 256;
1223 for (i = 0; i < adapter->num_rx_queues; i++)
1224 adapter->rx_ring[i].count = adapter->rx_ring->count;
1225
1226 adapter->fc_autoneg = true;
1227 hw->mac.autoneg = true;
1228 hw->phy.autoneg_advertised = 0x2f;
1229
1230 hw->fc.original_type = e1000_fc_default;
1231 hw->fc.type = e1000_fc_default;
1232
1233 adapter->itr_setting = 3;
1234 adapter->itr = IGB_START_ITR;
1235
1236 igb_validate_mdi_setting(hw);
1237
1238 adapter->rx_csum = 1;
1239
1240 /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1241 * enable the ACPI Magic Packet filter
1242 */
1243
1244 if (hw->bus.func == 0 ||
1245 hw->device_id == E1000_DEV_ID_82575EB_COPPER)
Alexander Duyck312c75a2009-02-06 23:17:47 +00001246 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
Auke Kok9d5c8242008-01-24 02:22:38 -08001247
1248 if (eeprom_data & eeprom_apme_mask)
1249 adapter->eeprom_wol |= E1000_WUFC_MAG;
1250
1251 /* now that we have the eeprom settings, apply the special cases where
1252 * the eeprom may be wrong or the board simply won't support wake on
1253 * lan on a particular port */
1254 switch (pdev->device) {
1255 case E1000_DEV_ID_82575GB_QUAD_COPPER:
1256 adapter->eeprom_wol = 0;
1257 break;
1258 case E1000_DEV_ID_82575EB_FIBER_SERDES:
Alexander Duyck2d064c02008-07-08 15:10:12 -07001259 case E1000_DEV_ID_82576_FIBER:
1260 case E1000_DEV_ID_82576_SERDES:
Auke Kok9d5c8242008-01-24 02:22:38 -08001261 /* Wake events only supported on port A for dual fiber
1262 * regardless of eeprom setting */
1263 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1)
1264 adapter->eeprom_wol = 0;
1265 break;
1266 }
1267
1268 /* initialize the wol settings based on the eeprom settings */
1269 adapter->wol = adapter->eeprom_wol;
\"Rafael J. Wysocki\e1b86d82008-11-07 20:30:37 +00001270 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
Auke Kok9d5c8242008-01-24 02:22:38 -08001271
1272 /* reset the hardware with the new settings */
1273 igb_reset(adapter);
1274
1275 /* let the f/w know that the h/w is now under the control of the
1276 * driver. */
1277 igb_get_hw_control(adapter);
1278
1279 /* tell the stack to leave us alone until igb_open() is called */
1280 netif_carrier_off(netdev);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001281 netif_tx_stop_all_queues(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08001282
1283 strcpy(netdev->name, "eth%d");
1284 err = register_netdev(netdev);
1285 if (err)
1286 goto err_register;
1287
Jeff Kirsher421e02f2008-10-17 11:08:31 -07001288#ifdef CONFIG_IGB_DCA
Alexander Duyckbbd98fe2009-01-31 00:52:30 -08001289 if (dca_add_requester(&pdev->dev) == 0) {
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001290 adapter->flags |= IGB_FLAG_DCA_ENABLED;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07001291 dev_info(&pdev->dev, "DCA enabled\n");
1292 /* Always use CB2 mode, difference is masked
1293 * in the CB driver. */
1294 wr32(E1000_DCA_CTRL, 2);
1295 igb_setup_dca(adapter);
1296 }
1297#endif
1298
Auke Kok9d5c8242008-01-24 02:22:38 -08001299 dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
1300 /* print bus type/speed/width info */
Johannes Berg7c510e42008-10-27 17:47:26 -07001301 dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n",
Auke Kok9d5c8242008-01-24 02:22:38 -08001302 netdev->name,
1303 ((hw->bus.speed == e1000_bus_speed_2500)
1304 ? "2.5Gb/s" : "unknown"),
1305 ((hw->bus.width == e1000_bus_width_pcie_x4)
1306 ? "Width x4" : (hw->bus.width == e1000_bus_width_pcie_x1)
1307 ? "Width x1" : "unknown"),
Johannes Berg7c510e42008-10-27 17:47:26 -07001308 netdev->dev_addr);
Auke Kok9d5c8242008-01-24 02:22:38 -08001309
1310 igb_read_part_num(hw, &part_num);
1311 dev_info(&pdev->dev, "%s: PBA No: %06x-%03x\n", netdev->name,
1312 (part_num >> 8), (part_num & 0xff));
1313
1314 dev_info(&pdev->dev,
1315 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
1316 adapter->msix_entries ? "MSI-X" :
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001317 (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy",
Auke Kok9d5c8242008-01-24 02:22:38 -08001318 adapter->num_rx_queues, adapter->num_tx_queues);
1319
Auke Kok9d5c8242008-01-24 02:22:38 -08001320 return 0;
1321
1322err_register:
1323 igb_release_hw_control(adapter);
1324err_eeprom:
1325 if (!igb_check_reset_block(hw))
Alexander Duyckf5f4cf02008-11-21 21:30:24 -08001326 igb_reset_phy(hw);
Auke Kok9d5c8242008-01-24 02:22:38 -08001327
1328 if (hw->flash_address)
1329 iounmap(hw->flash_address);
1330
Alexander Duycka88f10e2008-07-08 15:13:38 -07001331 igb_free_queues(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -08001332err_sw_init:
1333err_hw_init:
1334 iounmap(hw->hw_addr);
1335err_ioremap:
1336 free_netdev(netdev);
1337err_alloc_etherdev:
Alexander Duyckaed5dec2009-02-06 23:16:04 +00001338 pci_release_selected_regions(pdev, pci_select_bars(pdev,
1339 IORESOURCE_MEM));
Auke Kok9d5c8242008-01-24 02:22:38 -08001340err_pci_reg:
1341err_dma:
1342 pci_disable_device(pdev);
1343 return err;
1344}
1345
1346/**
1347 * igb_remove - Device Removal Routine
1348 * @pdev: PCI device information struct
1349 *
1350 * igb_remove is called by the PCI subsystem to alert the driver
1351 * that it should release a PCI device. The could be caused by a
1352 * Hot-Plug event, or because the driver is going to be removed from
1353 * memory.
1354 **/
1355static void __devexit igb_remove(struct pci_dev *pdev)
1356{
1357 struct net_device *netdev = pci_get_drvdata(pdev);
1358 struct igb_adapter *adapter = netdev_priv(netdev);
Jeff Kirsher421e02f2008-10-17 11:08:31 -07001359#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -07001360 struct e1000_hw *hw = &adapter->hw;
Alexander Duyck9280fa52008-07-08 15:14:04 -07001361#endif
Jeff Kirsherea943d42008-12-11 20:34:19 -08001362 int err;
Auke Kok9d5c8242008-01-24 02:22:38 -08001363
1364 /* flush_scheduled work may reschedule our watchdog task, so
1365 * explicitly disable watchdog tasks from being rescheduled */
1366 set_bit(__IGB_DOWN, &adapter->state);
1367 del_timer_sync(&adapter->watchdog_timer);
1368 del_timer_sync(&adapter->phy_info_timer);
1369
1370 flush_scheduled_work();
1371
Jeff Kirsher421e02f2008-10-17 11:08:31 -07001372#ifdef CONFIG_IGB_DCA
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001373 if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
Jeb Cramerfe4506b2008-07-08 15:07:55 -07001374 dev_info(&pdev->dev, "DCA disabled\n");
1375 dca_remove_requester(&pdev->dev);
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07001376 adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07001377 wr32(E1000_DCA_CTRL, 1);
1378 }
1379#endif
1380
Auke Kok9d5c8242008-01-24 02:22:38 -08001381 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1382 * would have already happened in close and is redundant. */
1383 igb_release_hw_control(adapter);
1384
1385 unregister_netdev(netdev);
1386
Alexander Duyckf5f4cf02008-11-21 21:30:24 -08001387 if (!igb_check_reset_block(&adapter->hw))
1388 igb_reset_phy(&adapter->hw);
Auke Kok9d5c8242008-01-24 02:22:38 -08001389
Auke Kok9d5c8242008-01-24 02:22:38 -08001390 igb_reset_interrupt_capability(adapter);
1391
Alexander Duycka88f10e2008-07-08 15:13:38 -07001392 igb_free_queues(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -08001393
1394 iounmap(adapter->hw.hw_addr);
1395 if (adapter->hw.flash_address)
1396 iounmap(adapter->hw.flash_address);
Alexander Duyckaed5dec2009-02-06 23:16:04 +00001397 pci_release_selected_regions(pdev, pci_select_bars(pdev,
1398 IORESOURCE_MEM));
Auke Kok9d5c8242008-01-24 02:22:38 -08001399
1400 free_netdev(netdev);
1401
Jeff Kirsherea943d42008-12-11 20:34:19 -08001402 err = pci_disable_pcie_error_reporting(pdev);
1403 if (err)
1404 dev_err(&pdev->dev,
1405 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
Alexander Duyck40a914f2008-11-27 00:24:37 -08001406
Auke Kok9d5c8242008-01-24 02:22:38 -08001407 pci_disable_device(pdev);
1408}
1409
1410/**
1411 * igb_sw_init - Initialize general software structures (struct igb_adapter)
1412 * @adapter: board private structure to initialize
1413 *
1414 * igb_sw_init initializes the Adapter private data structure.
1415 * Fields are initialized based on PCI device information and
1416 * OS network device settings (MTU size).
1417 **/
1418static int __devinit igb_sw_init(struct igb_adapter *adapter)
1419{
1420 struct e1000_hw *hw = &adapter->hw;
1421 struct net_device *netdev = adapter->netdev;
1422 struct pci_dev *pdev = adapter->pdev;
1423
1424 pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
1425
Alexander Duyck68fd9912008-11-20 00:48:10 -08001426 adapter->tx_ring_count = IGB_DEFAULT_TXD;
1427 adapter->rx_ring_count = IGB_DEFAULT_RXD;
Auke Kok9d5c8242008-01-24 02:22:38 -08001428 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1429 adapter->rx_ps_hdr_size = 0; /* disable packet split */
1430 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1431 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1432
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07001433 /* This call may decrease the number of queues depending on
1434 * interrupt mode. */
Auke Kok9d5c8242008-01-24 02:22:38 -08001435 igb_set_interrupt_capability(adapter);
1436
1437 if (igb_alloc_queues(adapter)) {
1438 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1439 return -ENOMEM;
1440 }
1441
1442 /* Explicitly disable IRQ since the NIC can be in any state. */
1443 igb_irq_disable(adapter);
1444
1445 set_bit(__IGB_DOWN, &adapter->state);
1446 return 0;
1447}
1448
1449/**
1450 * igb_open - Called when a network interface is made active
1451 * @netdev: network interface device structure
1452 *
1453 * Returns 0 on success, negative value on failure
1454 *
1455 * The open entry point is called when a network interface is made
1456 * active by the system (IFF_UP). At this point all resources needed
1457 * for transmit and receive operations are allocated, the interrupt
1458 * handler is registered with the OS, the watchdog timer is started,
1459 * and the stack is notified that the interface is ready.
1460 **/
1461static int igb_open(struct net_device *netdev)
1462{
1463 struct igb_adapter *adapter = netdev_priv(netdev);
1464 struct e1000_hw *hw = &adapter->hw;
1465 int err;
1466 int i;
1467
1468 /* disallow open during test */
1469 if (test_bit(__IGB_TESTING, &adapter->state))
1470 return -EBUSY;
1471
1472 /* allocate transmit descriptors */
1473 err = igb_setup_all_tx_resources(adapter);
1474 if (err)
1475 goto err_setup_tx;
1476
1477 /* allocate receive descriptors */
1478 err = igb_setup_all_rx_resources(adapter);
1479 if (err)
1480 goto err_setup_rx;
1481
1482 /* e1000_power_up_phy(adapter); */
1483
1484 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
1485 if ((adapter->hw.mng_cookie.status &
1486 E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
1487 igb_update_mng_vlan(adapter);
1488
1489 /* before we allocate an interrupt, we must be ready to handle it.
1490 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1491 * as soon as we call pci_request_irq, so we have to setup our
1492 * clean_rx handler before we do so. */
1493 igb_configure(adapter);
1494
1495 err = igb_request_irq(adapter);
1496 if (err)
1497 goto err_req_irq;
1498
1499 /* From here on the code is the same as igb_up() */
1500 clear_bit(__IGB_DOWN, &adapter->state);
1501
PJ Waskiewicz844290e2008-06-27 11:00:39 -07001502 for (i = 0; i < adapter->num_rx_queues; i++)
1503 napi_enable(&adapter->rx_ring[i].napi);
Auke Kok9d5c8242008-01-24 02:22:38 -08001504
1505 /* Clear any pending interrupts. */
1506 rd32(E1000_ICR);
PJ Waskiewicz844290e2008-06-27 11:00:39 -07001507
1508 igb_irq_enable(adapter);
1509
Jeff Kirsherd55b53f2008-07-18 04:33:03 -07001510 netif_tx_start_all_queues(netdev);
1511
Auke Kok9d5c8242008-01-24 02:22:38 -08001512 /* Fire a link status change interrupt to start the watchdog. */
1513 wr32(E1000_ICS, E1000_ICS_LSC);
1514
1515 return 0;
1516
1517err_req_irq:
1518 igb_release_hw_control(adapter);
1519 /* e1000_power_down_phy(adapter); */
1520 igb_free_all_rx_resources(adapter);
1521err_setup_rx:
1522 igb_free_all_tx_resources(adapter);
1523err_setup_tx:
1524 igb_reset(adapter);
1525
1526 return err;
1527}
1528
1529/**
1530 * igb_close - Disables a network interface
1531 * @netdev: network interface device structure
1532 *
1533 * Returns 0, this is not allowed to fail
1534 *
1535 * The close entry point is called when an interface is de-activated
1536 * by the OS. The hardware is still under the driver's control, but
1537 * needs to be disabled. A global MAC reset is issued to stop the
1538 * hardware, and all transmit and receive resources are freed.
1539 **/
1540static int igb_close(struct net_device *netdev)
1541{
1542 struct igb_adapter *adapter = netdev_priv(netdev);
1543
1544 WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
1545 igb_down(adapter);
1546
1547 igb_free_irq(adapter);
1548
1549 igb_free_all_tx_resources(adapter);
1550 igb_free_all_rx_resources(adapter);
1551
1552 /* kill manageability vlan ID if supported, but not if a vlan with
1553 * the same ID is registered on the host OS (let 8021q kill it) */
1554 if ((adapter->hw.mng_cookie.status &
1555 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1556 !(adapter->vlgrp &&
1557 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
1558 igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1559
1560 return 0;
1561}
1562
1563/**
1564 * igb_setup_tx_resources - allocate Tx resources (Descriptors)
1565 * @adapter: board private structure
1566 * @tx_ring: tx descriptor ring (for a specific queue) to setup
1567 *
1568 * Return 0 on success, negative on failure
1569 **/
1570
1571int igb_setup_tx_resources(struct igb_adapter *adapter,
1572 struct igb_ring *tx_ring)
1573{
1574 struct pci_dev *pdev = adapter->pdev;
1575 int size;
1576
1577 size = sizeof(struct igb_buffer) * tx_ring->count;
1578 tx_ring->buffer_info = vmalloc(size);
1579 if (!tx_ring->buffer_info)
1580 goto err;
1581 memset(tx_ring->buffer_info, 0, size);
1582
1583 /* round up to nearest 4K */
Alexander Duyck0e014cb2008-12-26 01:33:18 -08001584 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
Auke Kok9d5c8242008-01-24 02:22:38 -08001585 tx_ring->size = ALIGN(tx_ring->size, 4096);
1586
1587 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
1588 &tx_ring->dma);
1589
1590 if (!tx_ring->desc)
1591 goto err;
1592
1593 tx_ring->adapter = adapter;
1594 tx_ring->next_to_use = 0;
1595 tx_ring->next_to_clean = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08001596 return 0;
1597
1598err:
1599 vfree(tx_ring->buffer_info);
1600 dev_err(&adapter->pdev->dev,
1601 "Unable to allocate memory for the transmit descriptor ring\n");
1602 return -ENOMEM;
1603}
1604
1605/**
1606 * igb_setup_all_tx_resources - wrapper to allocate Tx resources
1607 * (Descriptors) for all queues
1608 * @adapter: board private structure
1609 *
1610 * Return 0 on success, negative on failure
1611 **/
1612static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
1613{
1614 int i, err = 0;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07001615 int r_idx;
Auke Kok9d5c8242008-01-24 02:22:38 -08001616
1617 for (i = 0; i < adapter->num_tx_queues; i++) {
1618 err = igb_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1619 if (err) {
1620 dev_err(&adapter->pdev->dev,
1621 "Allocation for Tx Queue %u failed\n", i);
1622 for (i--; i >= 0; i--)
Mitch Williams3b644cf2008-06-27 10:59:48 -07001623 igb_free_tx_resources(&adapter->tx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08001624 break;
1625 }
1626 }
1627
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07001628 for (i = 0; i < IGB_MAX_TX_QUEUES; i++) {
1629 r_idx = i % adapter->num_tx_queues;
1630 adapter->multi_tx_table[i] = &adapter->tx_ring[r_idx];
1631 }
Auke Kok9d5c8242008-01-24 02:22:38 -08001632 return err;
1633}
1634
1635/**
1636 * igb_configure_tx - Configure transmit Unit after Reset
1637 * @adapter: board private structure
1638 *
1639 * Configure the Tx unit of the MAC after a reset.
1640 **/
1641static void igb_configure_tx(struct igb_adapter *adapter)
1642{
Alexander Duyck0e014cb2008-12-26 01:33:18 -08001643 u64 tdba;
Auke Kok9d5c8242008-01-24 02:22:38 -08001644 struct e1000_hw *hw = &adapter->hw;
1645 u32 tctl;
1646 u32 txdctl, txctrl;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001647 int i, j;
Auke Kok9d5c8242008-01-24 02:22:38 -08001648
1649 for (i = 0; i < adapter->num_tx_queues; i++) {
1650 struct igb_ring *ring = &(adapter->tx_ring[i]);
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001651 j = ring->reg_idx;
1652 wr32(E1000_TDLEN(j),
Auke Kok9d5c8242008-01-24 02:22:38 -08001653 ring->count * sizeof(struct e1000_tx_desc));
1654 tdba = ring->dma;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001655 wr32(E1000_TDBAL(j),
Auke Kok9d5c8242008-01-24 02:22:38 -08001656 tdba & 0x00000000ffffffffULL);
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001657 wr32(E1000_TDBAH(j), tdba >> 32);
Auke Kok9d5c8242008-01-24 02:22:38 -08001658
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001659 ring->head = E1000_TDH(j);
1660 ring->tail = E1000_TDT(j);
Auke Kok9d5c8242008-01-24 02:22:38 -08001661 writel(0, hw->hw_addr + ring->tail);
1662 writel(0, hw->hw_addr + ring->head);
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001663 txdctl = rd32(E1000_TXDCTL(j));
Auke Kok9d5c8242008-01-24 02:22:38 -08001664 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001665 wr32(E1000_TXDCTL(j), txdctl);
Auke Kok9d5c8242008-01-24 02:22:38 -08001666
1667 /* Turn off Relaxed Ordering on head write-backs. The
1668 * writebacks MUST be delivered in order or it will
1669 * completely screw up our bookeeping.
1670 */
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001671 txctrl = rd32(E1000_DCA_TXCTRL(j));
Auke Kok9d5c8242008-01-24 02:22:38 -08001672 txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001673 wr32(E1000_DCA_TXCTRL(j), txctrl);
Auke Kok9d5c8242008-01-24 02:22:38 -08001674 }
1675
1676
1677
1678 /* Use the default values for the Tx Inter Packet Gap (IPG) timer */
1679
1680 /* Program the Transmit Control Register */
1681
1682 tctl = rd32(E1000_TCTL);
1683 tctl &= ~E1000_TCTL_CT;
1684 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1685 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1686
1687 igb_config_collision_dist(hw);
1688
1689 /* Setup Transmit Descriptor Settings for eop descriptor */
1690 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS;
1691
1692 /* Enable transmits */
1693 tctl |= E1000_TCTL_EN;
1694
1695 wr32(E1000_TCTL, tctl);
1696}
1697
1698/**
1699 * igb_setup_rx_resources - allocate Rx resources (Descriptors)
1700 * @adapter: board private structure
1701 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1702 *
1703 * Returns 0 on success, negative on failure
1704 **/
1705
1706int igb_setup_rx_resources(struct igb_adapter *adapter,
1707 struct igb_ring *rx_ring)
1708{
1709 struct pci_dev *pdev = adapter->pdev;
1710 int size, desc_len;
1711
1712 size = sizeof(struct igb_buffer) * rx_ring->count;
1713 rx_ring->buffer_info = vmalloc(size);
1714 if (!rx_ring->buffer_info)
1715 goto err;
1716 memset(rx_ring->buffer_info, 0, size);
1717
1718 desc_len = sizeof(union e1000_adv_rx_desc);
1719
1720 /* Round up to nearest 4K */
1721 rx_ring->size = rx_ring->count * desc_len;
1722 rx_ring->size = ALIGN(rx_ring->size, 4096);
1723
1724 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
1725 &rx_ring->dma);
1726
1727 if (!rx_ring->desc)
1728 goto err;
1729
1730 rx_ring->next_to_clean = 0;
1731 rx_ring->next_to_use = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08001732
1733 rx_ring->adapter = adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08001734
1735 return 0;
1736
1737err:
1738 vfree(rx_ring->buffer_info);
1739 dev_err(&adapter->pdev->dev, "Unable to allocate memory for "
1740 "the receive descriptor ring\n");
1741 return -ENOMEM;
1742}
1743
1744/**
1745 * igb_setup_all_rx_resources - wrapper to allocate Rx resources
1746 * (Descriptors) for all queues
1747 * @adapter: board private structure
1748 *
1749 * Return 0 on success, negative on failure
1750 **/
1751static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
1752{
1753 int i, err = 0;
1754
1755 for (i = 0; i < adapter->num_rx_queues; i++) {
1756 err = igb_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1757 if (err) {
1758 dev_err(&adapter->pdev->dev,
1759 "Allocation for Rx Queue %u failed\n", i);
1760 for (i--; i >= 0; i--)
Mitch Williams3b644cf2008-06-27 10:59:48 -07001761 igb_free_rx_resources(&adapter->rx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08001762 break;
1763 }
1764 }
1765
1766 return err;
1767}
1768
1769/**
1770 * igb_setup_rctl - configure the receive control registers
1771 * @adapter: Board private structure
1772 **/
1773static void igb_setup_rctl(struct igb_adapter *adapter)
1774{
1775 struct e1000_hw *hw = &adapter->hw;
1776 u32 rctl;
1777 u32 srrctl = 0;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001778 int i, j;
Auke Kok9d5c8242008-01-24 02:22:38 -08001779
1780 rctl = rd32(E1000_RCTL);
1781
1782 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
Alexander Duyck69d728b2008-11-25 01:04:03 -08001783 rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
Auke Kok9d5c8242008-01-24 02:22:38 -08001784
Alexander Duyck69d728b2008-11-25 01:04:03 -08001785 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF |
Auke Kok9d5c8242008-01-24 02:22:38 -08001786 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1787
Auke Kok87cb7e82008-07-08 15:08:29 -07001788 /*
1789 * enable stripping of CRC. It's unlikely this will break BMC
1790 * redirection as it did with e1000. Newer features require
1791 * that the HW strips the CRC.
Auke Kok9d5c8242008-01-24 02:22:38 -08001792 */
Auke Kok87cb7e82008-07-08 15:08:29 -07001793 rctl |= E1000_RCTL_SECRC;
Auke Kok9d5c8242008-01-24 02:22:38 -08001794
Alexander Duyck9b07f3d32008-11-25 01:03:26 -08001795 /*
Alexander Duyckec54d7d2009-01-31 00:52:57 -08001796 * disable store bad packets and clear size bits.
Alexander Duyck9b07f3d32008-11-25 01:03:26 -08001797 */
Alexander Duyckec54d7d2009-01-31 00:52:57 -08001798 rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256);
Auke Kok9d5c8242008-01-24 02:22:38 -08001799
Alexander Duyckec54d7d2009-01-31 00:52:57 -08001800 /* enable LPE when to prevent packets larger than max_frame_size */
Alexander Duyck9b07f3d32008-11-25 01:03:26 -08001801 rctl |= E1000_RCTL_LPE;
Alexander Duyckb4557be2008-12-10 01:08:59 -08001802
1803 /* Setup buffer sizes */
1804 switch (adapter->rx_buffer_len) {
1805 case IGB_RXBUFFER_256:
1806 rctl |= E1000_RCTL_SZ_256;
1807 break;
1808 case IGB_RXBUFFER_512:
1809 rctl |= E1000_RCTL_SZ_512;
1810 break;
1811 default:
1812 srrctl = ALIGN(adapter->rx_buffer_len, 1024)
1813 >> E1000_SRRCTL_BSIZEPKT_SHIFT;
1814 break;
Auke Kok9d5c8242008-01-24 02:22:38 -08001815 }
1816
1817 /* 82575 and greater support packet-split where the protocol
1818 * header is placed in skb->data and the packet data is
1819 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1820 * In the case of a non-split, skb->data is linearly filled,
1821 * followed by the page buffers. Therefore, skb->data is
1822 * sized to hold the largest protocol header.
1823 */
1824 /* allocations using alloc_page take too long for regular MTU
1825 * so only enable packet split for jumbo frames */
Alexander Duyckec54d7d2009-01-31 00:52:57 -08001826 if (adapter->netdev->mtu > ETH_DATA_LEN) {
Auke Kok9d5c8242008-01-24 02:22:38 -08001827 adapter->rx_ps_hdr_size = IGB_RXBUFFER_128;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07001828 srrctl |= adapter->rx_ps_hdr_size <<
Auke Kok9d5c8242008-01-24 02:22:38 -08001829 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
Auke Kok9d5c8242008-01-24 02:22:38 -08001830 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1831 } else {
1832 adapter->rx_ps_hdr_size = 0;
1833 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1834 }
1835
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001836 for (i = 0; i < adapter->num_rx_queues; i++) {
1837 j = adapter->rx_ring[i].reg_idx;
1838 wr32(E1000_SRRCTL(j), srrctl);
1839 }
Auke Kok9d5c8242008-01-24 02:22:38 -08001840
1841 wr32(E1000_RCTL, rctl);
1842}
1843
1844/**
1845 * igb_configure_rx - Configure receive Unit after Reset
1846 * @adapter: board private structure
1847 *
1848 * Configure the Rx unit of the MAC after a reset.
1849 **/
1850static void igb_configure_rx(struct igb_adapter *adapter)
1851{
1852 u64 rdba;
1853 struct e1000_hw *hw = &adapter->hw;
1854 u32 rctl, rxcsum;
1855 u32 rxdctl;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001856 int i, j;
Auke Kok9d5c8242008-01-24 02:22:38 -08001857
1858 /* disable receives while setting up the descriptors */
1859 rctl = rd32(E1000_RCTL);
1860 wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
1861 wrfl();
1862 mdelay(10);
1863
1864 if (adapter->itr_setting > 3)
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07001865 wr32(E1000_ITR, adapter->itr);
Auke Kok9d5c8242008-01-24 02:22:38 -08001866
1867 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1868 * the Base and Length of the Rx Descriptor Ring */
1869 for (i = 0; i < adapter->num_rx_queues; i++) {
1870 struct igb_ring *ring = &(adapter->rx_ring[i]);
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001871 j = ring->reg_idx;
Auke Kok9d5c8242008-01-24 02:22:38 -08001872 rdba = ring->dma;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001873 wr32(E1000_RDBAL(j),
Auke Kok9d5c8242008-01-24 02:22:38 -08001874 rdba & 0x00000000ffffffffULL);
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001875 wr32(E1000_RDBAH(j), rdba >> 32);
1876 wr32(E1000_RDLEN(j),
Auke Kok9d5c8242008-01-24 02:22:38 -08001877 ring->count * sizeof(union e1000_adv_rx_desc));
1878
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001879 ring->head = E1000_RDH(j);
1880 ring->tail = E1000_RDT(j);
Auke Kok9d5c8242008-01-24 02:22:38 -08001881 writel(0, hw->hw_addr + ring->tail);
1882 writel(0, hw->hw_addr + ring->head);
1883
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001884 rxdctl = rd32(E1000_RXDCTL(j));
Auke Kok9d5c8242008-01-24 02:22:38 -08001885 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1886 rxdctl &= 0xFFF00000;
1887 rxdctl |= IGB_RX_PTHRESH;
1888 rxdctl |= IGB_RX_HTHRESH << 8;
1889 rxdctl |= IGB_RX_WTHRESH << 16;
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001890 wr32(E1000_RXDCTL(j), rxdctl);
Auke Kok9d5c8242008-01-24 02:22:38 -08001891 }
1892
1893 if (adapter->num_rx_queues > 1) {
1894 u32 random[10];
1895 u32 mrqc;
1896 u32 j, shift;
1897 union e1000_reta {
1898 u32 dword;
1899 u8 bytes[4];
1900 } reta;
1901
1902 get_random_bytes(&random[0], 40);
1903
Alexander Duyck2d064c02008-07-08 15:10:12 -07001904 if (hw->mac.type >= e1000_82576)
1905 shift = 0;
1906 else
1907 shift = 6;
Auke Kok9d5c8242008-01-24 02:22:38 -08001908 for (j = 0; j < (32 * 4); j++) {
1909 reta.bytes[j & 3] =
Alexander Duyck26bc19e2008-12-26 01:34:11 -08001910 adapter->rx_ring[(j % adapter->num_rx_queues)].reg_idx << shift;
Auke Kok9d5c8242008-01-24 02:22:38 -08001911 if ((j & 3) == 3)
1912 writel(reta.dword,
1913 hw->hw_addr + E1000_RETA(0) + (j & ~3));
1914 }
1915 mrqc = E1000_MRQC_ENABLE_RSS_4Q;
1916
1917 /* Fill out hash function seeds */
1918 for (j = 0; j < 10; j++)
1919 array_wr32(E1000_RSSRK(0), j, random[j]);
1920
1921 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1922 E1000_MRQC_RSS_FIELD_IPV4_TCP);
1923 mrqc |= (E1000_MRQC_RSS_FIELD_IPV6 |
1924 E1000_MRQC_RSS_FIELD_IPV6_TCP);
1925 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4_UDP |
1926 E1000_MRQC_RSS_FIELD_IPV6_UDP);
1927 mrqc |= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX |
1928 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
1929
1930
1931 wr32(E1000_MRQC, mrqc);
1932
1933 /* Multiqueue and raw packet checksumming are mutually
1934 * exclusive. Note that this not the same as TCP/IP
1935 * checksumming, which works fine. */
1936 rxcsum = rd32(E1000_RXCSUM);
1937 rxcsum |= E1000_RXCSUM_PCSD;
1938 wr32(E1000_RXCSUM, rxcsum);
1939 } else {
1940 /* Enable Receive Checksum Offload for TCP and UDP */
1941 rxcsum = rd32(E1000_RXCSUM);
1942 if (adapter->rx_csum) {
1943 rxcsum |= E1000_RXCSUM_TUOFL;
1944
1945 /* Enable IPv4 payload checksum for UDP fragments
1946 * Must be used in conjunction with packet-split. */
1947 if (adapter->rx_ps_hdr_size)
1948 rxcsum |= E1000_RXCSUM_IPPCSE;
1949 } else {
1950 rxcsum &= ~E1000_RXCSUM_TUOFL;
1951 /* don't need to clear IPPCSE as it defaults to 0 */
1952 }
1953 wr32(E1000_RXCSUM, rxcsum);
1954 }
1955
1956 if (adapter->vlgrp)
1957 wr32(E1000_RLPML,
1958 adapter->max_frame_size + VLAN_TAG_SIZE);
1959 else
1960 wr32(E1000_RLPML, adapter->max_frame_size);
1961
1962 /* Enable Receives */
1963 wr32(E1000_RCTL, rctl);
1964}
1965
1966/**
1967 * igb_free_tx_resources - Free Tx Resources per Queue
Auke Kok9d5c8242008-01-24 02:22:38 -08001968 * @tx_ring: Tx descriptor ring for a specific queue
1969 *
1970 * Free all transmit software resources
1971 **/
Alexander Duyck68fd9912008-11-20 00:48:10 -08001972void igb_free_tx_resources(struct igb_ring *tx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08001973{
Mitch Williams3b644cf2008-06-27 10:59:48 -07001974 struct pci_dev *pdev = tx_ring->adapter->pdev;
Auke Kok9d5c8242008-01-24 02:22:38 -08001975
Mitch Williams3b644cf2008-06-27 10:59:48 -07001976 igb_clean_tx_ring(tx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08001977
1978 vfree(tx_ring->buffer_info);
1979 tx_ring->buffer_info = NULL;
1980
1981 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1982
1983 tx_ring->desc = NULL;
1984}
1985
1986/**
1987 * igb_free_all_tx_resources - Free Tx Resources for All Queues
1988 * @adapter: board private structure
1989 *
1990 * Free all transmit software resources
1991 **/
1992static void igb_free_all_tx_resources(struct igb_adapter *adapter)
1993{
1994 int i;
1995
1996 for (i = 0; i < adapter->num_tx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07001997 igb_free_tx_resources(&adapter->tx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08001998}
1999
2000static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter,
2001 struct igb_buffer *buffer_info)
2002{
2003 if (buffer_info->dma) {
2004 pci_unmap_page(adapter->pdev,
2005 buffer_info->dma,
2006 buffer_info->length,
2007 PCI_DMA_TODEVICE);
2008 buffer_info->dma = 0;
2009 }
2010 if (buffer_info->skb) {
2011 dev_kfree_skb_any(buffer_info->skb);
2012 buffer_info->skb = NULL;
2013 }
2014 buffer_info->time_stamp = 0;
2015 /* buffer_info must be completely set up in the transmit path */
2016}
2017
2018/**
2019 * igb_clean_tx_ring - Free Tx Buffers
Auke Kok9d5c8242008-01-24 02:22:38 -08002020 * @tx_ring: ring to be cleaned
2021 **/
Mitch Williams3b644cf2008-06-27 10:59:48 -07002022static void igb_clean_tx_ring(struct igb_ring *tx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08002023{
Mitch Williams3b644cf2008-06-27 10:59:48 -07002024 struct igb_adapter *adapter = tx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08002025 struct igb_buffer *buffer_info;
2026 unsigned long size;
2027 unsigned int i;
2028
2029 if (!tx_ring->buffer_info)
2030 return;
2031 /* Free all the Tx ring sk_buffs */
2032
2033 for (i = 0; i < tx_ring->count; i++) {
2034 buffer_info = &tx_ring->buffer_info[i];
2035 igb_unmap_and_free_tx_resource(adapter, buffer_info);
2036 }
2037
2038 size = sizeof(struct igb_buffer) * tx_ring->count;
2039 memset(tx_ring->buffer_info, 0, size);
2040
2041 /* Zero out the descriptor ring */
2042
2043 memset(tx_ring->desc, 0, tx_ring->size);
2044
2045 tx_ring->next_to_use = 0;
2046 tx_ring->next_to_clean = 0;
2047
2048 writel(0, adapter->hw.hw_addr + tx_ring->head);
2049 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2050}
2051
2052/**
2053 * igb_clean_all_tx_rings - Free Tx Buffers for all queues
2054 * @adapter: board private structure
2055 **/
2056static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
2057{
2058 int i;
2059
2060 for (i = 0; i < adapter->num_tx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07002061 igb_clean_tx_ring(&adapter->tx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08002062}
2063
2064/**
2065 * igb_free_rx_resources - Free Rx Resources
Auke Kok9d5c8242008-01-24 02:22:38 -08002066 * @rx_ring: ring to clean the resources from
2067 *
2068 * Free all receive software resources
2069 **/
Alexander Duyck68fd9912008-11-20 00:48:10 -08002070void igb_free_rx_resources(struct igb_ring *rx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08002071{
Mitch Williams3b644cf2008-06-27 10:59:48 -07002072 struct pci_dev *pdev = rx_ring->adapter->pdev;
Auke Kok9d5c8242008-01-24 02:22:38 -08002073
Mitch Williams3b644cf2008-06-27 10:59:48 -07002074 igb_clean_rx_ring(rx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08002075
2076 vfree(rx_ring->buffer_info);
2077 rx_ring->buffer_info = NULL;
2078
2079 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2080
2081 rx_ring->desc = NULL;
2082}
2083
2084/**
2085 * igb_free_all_rx_resources - Free Rx Resources for All Queues
2086 * @adapter: board private structure
2087 *
2088 * Free all receive software resources
2089 **/
2090static void igb_free_all_rx_resources(struct igb_adapter *adapter)
2091{
2092 int i;
2093
2094 for (i = 0; i < adapter->num_rx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07002095 igb_free_rx_resources(&adapter->rx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08002096}
2097
2098/**
2099 * igb_clean_rx_ring - Free Rx Buffers per Queue
Auke Kok9d5c8242008-01-24 02:22:38 -08002100 * @rx_ring: ring to free buffers from
2101 **/
Mitch Williams3b644cf2008-06-27 10:59:48 -07002102static void igb_clean_rx_ring(struct igb_ring *rx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08002103{
Mitch Williams3b644cf2008-06-27 10:59:48 -07002104 struct igb_adapter *adapter = rx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08002105 struct igb_buffer *buffer_info;
2106 struct pci_dev *pdev = adapter->pdev;
2107 unsigned long size;
2108 unsigned int i;
2109
2110 if (!rx_ring->buffer_info)
2111 return;
2112 /* Free all the Rx ring sk_buffs */
2113 for (i = 0; i < rx_ring->count; i++) {
2114 buffer_info = &rx_ring->buffer_info[i];
2115 if (buffer_info->dma) {
2116 if (adapter->rx_ps_hdr_size)
2117 pci_unmap_single(pdev, buffer_info->dma,
2118 adapter->rx_ps_hdr_size,
2119 PCI_DMA_FROMDEVICE);
2120 else
2121 pci_unmap_single(pdev, buffer_info->dma,
2122 adapter->rx_buffer_len,
2123 PCI_DMA_FROMDEVICE);
2124 buffer_info->dma = 0;
2125 }
2126
2127 if (buffer_info->skb) {
2128 dev_kfree_skb(buffer_info->skb);
2129 buffer_info->skb = NULL;
2130 }
2131 if (buffer_info->page) {
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07002132 if (buffer_info->page_dma)
2133 pci_unmap_page(pdev, buffer_info->page_dma,
2134 PAGE_SIZE / 2,
2135 PCI_DMA_FROMDEVICE);
Auke Kok9d5c8242008-01-24 02:22:38 -08002136 put_page(buffer_info->page);
2137 buffer_info->page = NULL;
2138 buffer_info->page_dma = 0;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07002139 buffer_info->page_offset = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08002140 }
2141 }
2142
Auke Kok9d5c8242008-01-24 02:22:38 -08002143 size = sizeof(struct igb_buffer) * rx_ring->count;
2144 memset(rx_ring->buffer_info, 0, size);
2145
2146 /* Zero out the descriptor ring */
2147 memset(rx_ring->desc, 0, rx_ring->size);
2148
2149 rx_ring->next_to_clean = 0;
2150 rx_ring->next_to_use = 0;
2151
2152 writel(0, adapter->hw.hw_addr + rx_ring->head);
2153 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2154}
2155
2156/**
2157 * igb_clean_all_rx_rings - Free Rx Buffers for all queues
2158 * @adapter: board private structure
2159 **/
2160static void igb_clean_all_rx_rings(struct igb_adapter *adapter)
2161{
2162 int i;
2163
2164 for (i = 0; i < adapter->num_rx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07002165 igb_clean_rx_ring(&adapter->rx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08002166}
2167
2168/**
2169 * igb_set_mac - Change the Ethernet Address of the NIC
2170 * @netdev: network interface device structure
2171 * @p: pointer to an address structure
2172 *
2173 * Returns 0 on success, negative on failure
2174 **/
2175static int igb_set_mac(struct net_device *netdev, void *p)
2176{
2177 struct igb_adapter *adapter = netdev_priv(netdev);
2178 struct sockaddr *addr = p;
2179
2180 if (!is_valid_ether_addr(addr->sa_data))
2181 return -EADDRNOTAVAIL;
2182
2183 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2184 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2185
2186 adapter->hw.mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2187
2188 return 0;
2189}
2190
2191/**
2192 * igb_set_multi - Multicast and Promiscuous mode set
2193 * @netdev: network interface device structure
2194 *
2195 * The set_multi entry point is called whenever the multicast address
2196 * list or the network interface flags are updated. This routine is
2197 * responsible for configuring the hardware for proper multicast,
2198 * promiscuous mode, and all-multi behavior.
2199 **/
2200static void igb_set_multi(struct net_device *netdev)
2201{
2202 struct igb_adapter *adapter = netdev_priv(netdev);
2203 struct e1000_hw *hw = &adapter->hw;
2204 struct e1000_mac_info *mac = &hw->mac;
2205 struct dev_mc_list *mc_ptr;
2206 u8 *mta_list;
2207 u32 rctl;
2208 int i;
2209
2210 /* Check for Promiscuous and All Multicast modes */
2211
2212 rctl = rd32(E1000_RCTL);
2213
Patrick McHardy746b9f02008-07-16 20:15:45 -07002214 if (netdev->flags & IFF_PROMISC) {
Auke Kok9d5c8242008-01-24 02:22:38 -08002215 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
Patrick McHardy746b9f02008-07-16 20:15:45 -07002216 rctl &= ~E1000_RCTL_VFE;
2217 } else {
2218 if (netdev->flags & IFF_ALLMULTI) {
2219 rctl |= E1000_RCTL_MPE;
2220 rctl &= ~E1000_RCTL_UPE;
2221 } else
2222 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
Patrick McHardy78ed11a2008-07-16 20:16:14 -07002223 rctl |= E1000_RCTL_VFE;
Patrick McHardy746b9f02008-07-16 20:15:45 -07002224 }
Auke Kok9d5c8242008-01-24 02:22:38 -08002225 wr32(E1000_RCTL, rctl);
2226
2227 if (!netdev->mc_count) {
2228 /* nothing to program, so clear mc list */
Alexander Duyck2d064c02008-07-08 15:10:12 -07002229 igb_update_mc_addr_list_82575(hw, NULL, 0, 1,
Auke Kok9d5c8242008-01-24 02:22:38 -08002230 mac->rar_entry_count);
2231 return;
2232 }
2233
2234 mta_list = kzalloc(netdev->mc_count * 6, GFP_ATOMIC);
2235 if (!mta_list)
2236 return;
2237
2238 /* The shared function expects a packed array of only addresses. */
2239 mc_ptr = netdev->mc_list;
2240
2241 for (i = 0; i < netdev->mc_count; i++) {
2242 if (!mc_ptr)
2243 break;
2244 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN);
2245 mc_ptr = mc_ptr->next;
2246 }
Alexander Duyck2d064c02008-07-08 15:10:12 -07002247 igb_update_mc_addr_list_82575(hw, mta_list, i, 1,
2248 mac->rar_entry_count);
Auke Kok9d5c8242008-01-24 02:22:38 -08002249 kfree(mta_list);
2250}
2251
2252/* Need to wait a few seconds after link up to get diagnostic information from
2253 * the phy */
2254static void igb_update_phy_info(unsigned long data)
2255{
2256 struct igb_adapter *adapter = (struct igb_adapter *) data;
Alexander Duyckf5f4cf02008-11-21 21:30:24 -08002257 igb_get_phy_info(&adapter->hw);
Auke Kok9d5c8242008-01-24 02:22:38 -08002258}
2259
2260/**
Alexander Duyck4d6b7252009-02-06 23:16:24 +00002261 * igb_has_link - check shared code for link and determine up/down
2262 * @adapter: pointer to driver private info
2263 **/
2264static bool igb_has_link(struct igb_adapter *adapter)
2265{
2266 struct e1000_hw *hw = &adapter->hw;
2267 bool link_active = false;
2268 s32 ret_val = 0;
2269
2270 /* get_link_status is set on LSC (link status) interrupt or
2271 * rx sequence error interrupt. get_link_status will stay
2272 * false until the e1000_check_for_link establishes link
2273 * for copper adapters ONLY
2274 */
2275 switch (hw->phy.media_type) {
2276 case e1000_media_type_copper:
2277 if (hw->mac.get_link_status) {
2278 ret_val = hw->mac.ops.check_for_link(hw);
2279 link_active = !hw->mac.get_link_status;
2280 } else {
2281 link_active = true;
2282 }
2283 break;
2284 case e1000_media_type_fiber:
2285 ret_val = hw->mac.ops.check_for_link(hw);
2286 link_active = !!(rd32(E1000_STATUS) & E1000_STATUS_LU);
2287 break;
2288 case e1000_media_type_internal_serdes:
2289 ret_val = hw->mac.ops.check_for_link(hw);
2290 link_active = hw->mac.serdes_has_link;
2291 break;
2292 default:
2293 case e1000_media_type_unknown:
2294 break;
2295 }
2296
2297 return link_active;
2298}
2299
2300/**
Auke Kok9d5c8242008-01-24 02:22:38 -08002301 * igb_watchdog - Timer Call-back
2302 * @data: pointer to adapter cast into an unsigned long
2303 **/
2304static void igb_watchdog(unsigned long data)
2305{
2306 struct igb_adapter *adapter = (struct igb_adapter *)data;
2307 /* Do the rest outside of interrupt context */
2308 schedule_work(&adapter->watchdog_task);
2309}
2310
2311static void igb_watchdog_task(struct work_struct *work)
2312{
2313 struct igb_adapter *adapter = container_of(work,
2314 struct igb_adapter, watchdog_task);
2315 struct e1000_hw *hw = &adapter->hw;
2316
2317 struct net_device *netdev = adapter->netdev;
2318 struct igb_ring *tx_ring = adapter->tx_ring;
2319 struct e1000_mac_info *mac = &adapter->hw.mac;
2320 u32 link;
Alexander Duyck7a6ea552008-08-26 04:25:03 -07002321 u32 eics = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08002322 s32 ret_val;
Alexander Duyck7a6ea552008-08-26 04:25:03 -07002323 int i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002324
Alexander Duyck4d6b7252009-02-06 23:16:24 +00002325 link = igb_has_link(adapter);
2326 if ((netif_carrier_ok(netdev)) && link)
Auke Kok9d5c8242008-01-24 02:22:38 -08002327 goto link_up;
2328
Auke Kok9d5c8242008-01-24 02:22:38 -08002329 if (link) {
2330 if (!netif_carrier_ok(netdev)) {
2331 u32 ctrl;
2332 hw->mac.ops.get_speed_and_duplex(&adapter->hw,
2333 &adapter->link_speed,
2334 &adapter->link_duplex);
2335
2336 ctrl = rd32(E1000_CTRL);
Alexander Duyck527d47c2008-11-27 00:21:39 -08002337 /* Links status message must follow this format */
2338 printk(KERN_INFO "igb: %s NIC Link is Up %d Mbps %s, "
Auke Kok9d5c8242008-01-24 02:22:38 -08002339 "Flow Control: %s\n",
Alexander Duyck527d47c2008-11-27 00:21:39 -08002340 netdev->name,
Auke Kok9d5c8242008-01-24 02:22:38 -08002341 adapter->link_speed,
2342 adapter->link_duplex == FULL_DUPLEX ?
2343 "Full Duplex" : "Half Duplex",
2344 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2345 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2346 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2347 E1000_CTRL_TFCE) ? "TX" : "None")));
2348
2349 /* tweak tx_queue_len according to speed/duplex and
2350 * adjust the timeout factor */
2351 netdev->tx_queue_len = adapter->tx_queue_len;
2352 adapter->tx_timeout_factor = 1;
2353 switch (adapter->link_speed) {
2354 case SPEED_10:
2355 netdev->tx_queue_len = 10;
2356 adapter->tx_timeout_factor = 14;
2357 break;
2358 case SPEED_100:
2359 netdev->tx_queue_len = 100;
2360 /* maybe add some timeout factor ? */
2361 break;
2362 }
2363
2364 netif_carrier_on(netdev);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002365 netif_tx_wake_all_queues(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08002366
2367 if (!test_bit(__IGB_DOWN, &adapter->state))
2368 mod_timer(&adapter->phy_info_timer,
2369 round_jiffies(jiffies + 2 * HZ));
2370 }
2371 } else {
2372 if (netif_carrier_ok(netdev)) {
2373 adapter->link_speed = 0;
2374 adapter->link_duplex = 0;
Alexander Duyck527d47c2008-11-27 00:21:39 -08002375 /* Links status message must follow this format */
2376 printk(KERN_INFO "igb: %s NIC Link is Down\n",
2377 netdev->name);
Auke Kok9d5c8242008-01-24 02:22:38 -08002378 netif_carrier_off(netdev);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002379 netif_tx_stop_all_queues(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08002380 if (!test_bit(__IGB_DOWN, &adapter->state))
2381 mod_timer(&adapter->phy_info_timer,
2382 round_jiffies(jiffies + 2 * HZ));
2383 }
2384 }
2385
2386link_up:
2387 igb_update_stats(adapter);
2388
2389 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2390 adapter->tpt_old = adapter->stats.tpt;
2391 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
2392 adapter->colc_old = adapter->stats.colc;
2393
2394 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
2395 adapter->gorc_old = adapter->stats.gorc;
2396 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
2397 adapter->gotc_old = adapter->stats.gotc;
2398
2399 igb_update_adaptive(&adapter->hw);
2400
2401 if (!netif_carrier_ok(netdev)) {
2402 if (IGB_DESC_UNUSED(tx_ring) + 1 < tx_ring->count) {
2403 /* We've lost link, so the controller stops DMA,
2404 * but we've got queued Tx work that's never going
2405 * to get done, so reset controller to flush Tx.
2406 * (Do the reset outside of interrupt context). */
2407 adapter->tx_timeout_count++;
2408 schedule_work(&adapter->reset_task);
2409 }
2410 }
2411
2412 /* Cause software interrupt to ensure rx ring is cleaned */
Alexander Duyck7a6ea552008-08-26 04:25:03 -07002413 if (adapter->msix_entries) {
2414 for (i = 0; i < adapter->num_rx_queues; i++)
2415 eics |= adapter->rx_ring[i].eims_value;
2416 wr32(E1000_EICS, eics);
2417 } else {
2418 wr32(E1000_ICS, E1000_ICS_RXDMT0);
2419 }
Auke Kok9d5c8242008-01-24 02:22:38 -08002420
2421 /* Force detection of hung controller every watchdog period */
2422 tx_ring->detect_tx_hung = true;
2423
2424 /* Reset the timer */
2425 if (!test_bit(__IGB_DOWN, &adapter->state))
2426 mod_timer(&adapter->watchdog_timer,
2427 round_jiffies(jiffies + 2 * HZ));
2428}
2429
2430enum latency_range {
2431 lowest_latency = 0,
2432 low_latency = 1,
2433 bulk_latency = 2,
2434 latency_invalid = 255
2435};
2436
2437
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002438/**
2439 * igb_update_ring_itr - update the dynamic ITR value based on packet size
2440 *
2441 * Stores a new ITR value based on strictly on packet size. This
2442 * algorithm is less sophisticated than that used in igb_update_itr,
2443 * due to the difficulty of synchronizing statistics across multiple
2444 * receive rings. The divisors and thresholds used by this fuction
2445 * were determined based on theoretical maximum wire speed and testing
2446 * data, in order to minimize response time while increasing bulk
2447 * throughput.
2448 * This functionality is controlled by the InterruptThrottleRate module
2449 * parameter (see igb_param.c)
2450 * NOTE: This function is called only when operating in a multiqueue
2451 * receive environment.
2452 * @rx_ring: pointer to ring
2453 **/
2454static void igb_update_ring_itr(struct igb_ring *rx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08002455{
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002456 int new_val = rx_ring->itr_val;
2457 int avg_wire_size = 0;
2458 struct igb_adapter *adapter = rx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08002459
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002460 if (!rx_ring->total_packets)
2461 goto clear_counts; /* no packets, so don't do anything */
Auke Kok9d5c8242008-01-24 02:22:38 -08002462
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002463 /* For non-gigabit speeds, just fix the interrupt rate at 4000
2464 * ints/sec - ITR timer value of 120 ticks.
2465 */
2466 if (adapter->link_speed != SPEED_1000) {
2467 new_val = 120;
2468 goto set_itr_val;
2469 }
2470 avg_wire_size = rx_ring->total_bytes / rx_ring->total_packets;
2471
2472 /* Add 24 bytes to size to account for CRC, preamble, and gap */
2473 avg_wire_size += 24;
2474
2475 /* Don't starve jumbo frames */
2476 avg_wire_size = min(avg_wire_size, 3000);
2477
2478 /* Give a little boost to mid-size frames */
2479 if ((avg_wire_size > 300) && (avg_wire_size < 1200))
2480 new_val = avg_wire_size / 3;
2481 else
2482 new_val = avg_wire_size / 2;
2483
2484set_itr_val:
Auke Kok9d5c8242008-01-24 02:22:38 -08002485 if (new_val != rx_ring->itr_val) {
2486 rx_ring->itr_val = new_val;
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002487 rx_ring->set_itr = 1;
Auke Kok9d5c8242008-01-24 02:22:38 -08002488 }
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002489clear_counts:
2490 rx_ring->total_bytes = 0;
2491 rx_ring->total_packets = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08002492}
2493
2494/**
2495 * igb_update_itr - update the dynamic ITR value based on statistics
2496 * Stores a new ITR value based on packets and byte
2497 * counts during the last interrupt. The advantage of per interrupt
2498 * computation is faster updates and more accurate ITR for the current
2499 * traffic pattern. Constants in this function were computed
2500 * based on theoretical maximum wire speed and thresholds were set based
2501 * on testing data as well as attempting to minimize response time
2502 * while increasing bulk throughput.
2503 * this functionality is controlled by the InterruptThrottleRate module
2504 * parameter (see igb_param.c)
2505 * NOTE: These calculations are only valid when operating in a single-
2506 * queue environment.
2507 * @adapter: pointer to adapter
2508 * @itr_setting: current adapter->itr
2509 * @packets: the number of packets during this measurement interval
2510 * @bytes: the number of bytes during this measurement interval
2511 **/
2512static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting,
2513 int packets, int bytes)
2514{
2515 unsigned int retval = itr_setting;
2516
2517 if (packets == 0)
2518 goto update_itr_done;
2519
2520 switch (itr_setting) {
2521 case lowest_latency:
2522 /* handle TSO and jumbo frames */
2523 if (bytes/packets > 8000)
2524 retval = bulk_latency;
2525 else if ((packets < 5) && (bytes > 512))
2526 retval = low_latency;
2527 break;
2528 case low_latency: /* 50 usec aka 20000 ints/s */
2529 if (bytes > 10000) {
2530 /* this if handles the TSO accounting */
2531 if (bytes/packets > 8000) {
2532 retval = bulk_latency;
2533 } else if ((packets < 10) || ((bytes/packets) > 1200)) {
2534 retval = bulk_latency;
2535 } else if ((packets > 35)) {
2536 retval = lowest_latency;
2537 }
2538 } else if (bytes/packets > 2000) {
2539 retval = bulk_latency;
2540 } else if (packets <= 2 && bytes < 512) {
2541 retval = lowest_latency;
2542 }
2543 break;
2544 case bulk_latency: /* 250 usec aka 4000 ints/s */
2545 if (bytes > 25000) {
2546 if (packets > 35)
2547 retval = low_latency;
2548 } else if (bytes < 6000) {
2549 retval = low_latency;
2550 }
2551 break;
2552 }
2553
2554update_itr_done:
2555 return retval;
2556}
2557
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002558static void igb_set_itr(struct igb_adapter *adapter)
Auke Kok9d5c8242008-01-24 02:22:38 -08002559{
2560 u16 current_itr;
2561 u32 new_itr = adapter->itr;
2562
2563 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2564 if (adapter->link_speed != SPEED_1000) {
2565 current_itr = 0;
2566 new_itr = 4000;
2567 goto set_itr_now;
2568 }
2569
2570 adapter->rx_itr = igb_update_itr(adapter,
2571 adapter->rx_itr,
2572 adapter->rx_ring->total_packets,
2573 adapter->rx_ring->total_bytes);
Auke Kok9d5c8242008-01-24 02:22:38 -08002574
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002575 if (adapter->rx_ring->buddy) {
Auke Kok9d5c8242008-01-24 02:22:38 -08002576 adapter->tx_itr = igb_update_itr(adapter,
2577 adapter->tx_itr,
2578 adapter->tx_ring->total_packets,
2579 adapter->tx_ring->total_bytes);
Auke Kok9d5c8242008-01-24 02:22:38 -08002580
2581 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2582 } else {
2583 current_itr = adapter->rx_itr;
2584 }
2585
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002586 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2587 if (adapter->itr_setting == 3 &&
2588 current_itr == lowest_latency)
2589 current_itr = low_latency;
2590
Auke Kok9d5c8242008-01-24 02:22:38 -08002591 switch (current_itr) {
2592 /* counts and packets in update_itr are dependent on these numbers */
2593 case lowest_latency:
2594 new_itr = 70000;
2595 break;
2596 case low_latency:
2597 new_itr = 20000; /* aka hwitr = ~200 */
2598 break;
2599 case bulk_latency:
2600 new_itr = 4000;
2601 break;
2602 default:
2603 break;
2604 }
2605
2606set_itr_now:
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002607 adapter->rx_ring->total_bytes = 0;
2608 adapter->rx_ring->total_packets = 0;
2609 if (adapter->rx_ring->buddy) {
2610 adapter->rx_ring->buddy->total_bytes = 0;
2611 adapter->rx_ring->buddy->total_packets = 0;
2612 }
2613
Auke Kok9d5c8242008-01-24 02:22:38 -08002614 if (new_itr != adapter->itr) {
2615 /* this attempts to bias the interrupt rate towards Bulk
2616 * by adding intermediate steps when interrupt rate is
2617 * increasing */
2618 new_itr = new_itr > adapter->itr ?
2619 min(adapter->itr + (new_itr >> 2), new_itr) :
2620 new_itr;
2621 /* Don't write the value here; it resets the adapter's
2622 * internal timer, and causes us to delay far longer than
2623 * we should between interrupts. Instead, we write the ITR
2624 * value at the beginning of the next interrupt so the timing
2625 * ends up being correct.
2626 */
2627 adapter->itr = new_itr;
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002628 adapter->rx_ring->itr_val = 1000000000 / (new_itr * 256);
2629 adapter->rx_ring->set_itr = 1;
Auke Kok9d5c8242008-01-24 02:22:38 -08002630 }
2631
2632 return;
2633}
2634
2635
2636#define IGB_TX_FLAGS_CSUM 0x00000001
2637#define IGB_TX_FLAGS_VLAN 0x00000002
2638#define IGB_TX_FLAGS_TSO 0x00000004
2639#define IGB_TX_FLAGS_IPV4 0x00000008
2640#define IGB_TX_FLAGS_VLAN_MASK 0xffff0000
2641#define IGB_TX_FLAGS_VLAN_SHIFT 16
2642
2643static inline int igb_tso_adv(struct igb_adapter *adapter,
2644 struct igb_ring *tx_ring,
2645 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2646{
2647 struct e1000_adv_tx_context_desc *context_desc;
2648 unsigned int i;
2649 int err;
2650 struct igb_buffer *buffer_info;
2651 u32 info = 0, tu_cmd = 0;
2652 u32 mss_l4len_idx, l4len;
2653 *hdr_len = 0;
2654
2655 if (skb_header_cloned(skb)) {
2656 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2657 if (err)
2658 return err;
2659 }
2660
2661 l4len = tcp_hdrlen(skb);
2662 *hdr_len += l4len;
2663
2664 if (skb->protocol == htons(ETH_P_IP)) {
2665 struct iphdr *iph = ip_hdr(skb);
2666 iph->tot_len = 0;
2667 iph->check = 0;
2668 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2669 iph->daddr, 0,
2670 IPPROTO_TCP,
2671 0);
2672 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2673 ipv6_hdr(skb)->payload_len = 0;
2674 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2675 &ipv6_hdr(skb)->daddr,
2676 0, IPPROTO_TCP, 0);
2677 }
2678
2679 i = tx_ring->next_to_use;
2680
2681 buffer_info = &tx_ring->buffer_info[i];
2682 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
2683 /* VLAN MACLEN IPLEN */
2684 if (tx_flags & IGB_TX_FLAGS_VLAN)
2685 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
2686 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2687 *hdr_len += skb_network_offset(skb);
2688 info |= skb_network_header_len(skb);
2689 *hdr_len += skb_network_header_len(skb);
2690 context_desc->vlan_macip_lens = cpu_to_le32(info);
2691
2692 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2693 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2694
2695 if (skb->protocol == htons(ETH_P_IP))
2696 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2697 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2698
2699 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2700
2701 /* MSS L4LEN IDX */
2702 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
2703 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
2704
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07002705 /* Context index must be unique per ring. */
2706 if (adapter->flags & IGB_FLAG_NEED_CTX_IDX)
2707 mss_l4len_idx |= tx_ring->queue_index << 4;
Auke Kok9d5c8242008-01-24 02:22:38 -08002708
2709 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2710 context_desc->seqnum_seed = 0;
2711
2712 buffer_info->time_stamp = jiffies;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002713 buffer_info->next_to_watch = i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002714 buffer_info->dma = 0;
2715 i++;
2716 if (i == tx_ring->count)
2717 i = 0;
2718
2719 tx_ring->next_to_use = i;
2720
2721 return true;
2722}
2723
2724static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
2725 struct igb_ring *tx_ring,
2726 struct sk_buff *skb, u32 tx_flags)
2727{
2728 struct e1000_adv_tx_context_desc *context_desc;
2729 unsigned int i;
2730 struct igb_buffer *buffer_info;
2731 u32 info = 0, tu_cmd = 0;
2732
2733 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2734 (tx_flags & IGB_TX_FLAGS_VLAN)) {
2735 i = tx_ring->next_to_use;
2736 buffer_info = &tx_ring->buffer_info[i];
2737 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
2738
2739 if (tx_flags & IGB_TX_FLAGS_VLAN)
2740 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
2741 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2742 if (skb->ip_summed == CHECKSUM_PARTIAL)
2743 info |= skb_network_header_len(skb);
2744
2745 context_desc->vlan_macip_lens = cpu_to_le32(info);
2746
2747 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2748
2749 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Mitch Williams44b0cda2008-03-07 10:32:13 -08002750 switch (skb->protocol) {
Harvey Harrison09640e62009-02-01 00:45:17 -08002751 case cpu_to_be16(ETH_P_IP):
Auke Kok9d5c8242008-01-24 02:22:38 -08002752 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
Mitch Williams44b0cda2008-03-07 10:32:13 -08002753 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2754 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2755 break;
Harvey Harrison09640e62009-02-01 00:45:17 -08002756 case cpu_to_be16(ETH_P_IPV6):
Mitch Williams44b0cda2008-03-07 10:32:13 -08002757 /* XXX what about other V6 headers?? */
2758 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2759 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2760 break;
2761 default:
2762 if (unlikely(net_ratelimit()))
2763 dev_warn(&adapter->pdev->dev,
2764 "partial checksum but proto=%x!\n",
2765 skb->protocol);
2766 break;
2767 }
Auke Kok9d5c8242008-01-24 02:22:38 -08002768 }
2769
2770 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2771 context_desc->seqnum_seed = 0;
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07002772 if (adapter->flags & IGB_FLAG_NEED_CTX_IDX)
2773 context_desc->mss_l4len_idx =
2774 cpu_to_le32(tx_ring->queue_index << 4);
Auke Kok9d5c8242008-01-24 02:22:38 -08002775
2776 buffer_info->time_stamp = jiffies;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002777 buffer_info->next_to_watch = i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002778 buffer_info->dma = 0;
2779
2780 i++;
2781 if (i == tx_ring->count)
2782 i = 0;
2783 tx_ring->next_to_use = i;
2784
2785 return true;
2786 }
2787
2788
2789 return false;
2790}
2791
2792#define IGB_MAX_TXD_PWR 16
2793#define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR)
2794
2795static inline int igb_tx_map_adv(struct igb_adapter *adapter,
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002796 struct igb_ring *tx_ring, struct sk_buff *skb,
2797 unsigned int first)
Auke Kok9d5c8242008-01-24 02:22:38 -08002798{
2799 struct igb_buffer *buffer_info;
2800 unsigned int len = skb_headlen(skb);
2801 unsigned int count = 0, i;
2802 unsigned int f;
2803
2804 i = tx_ring->next_to_use;
2805
2806 buffer_info = &tx_ring->buffer_info[i];
2807 BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
2808 buffer_info->length = len;
2809 /* set time_stamp *before* dma to help avoid a possible race */
2810 buffer_info->time_stamp = jiffies;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002811 buffer_info->next_to_watch = i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002812 buffer_info->dma = pci_map_single(adapter->pdev, skb->data, len,
2813 PCI_DMA_TODEVICE);
2814 count++;
2815 i++;
2816 if (i == tx_ring->count)
2817 i = 0;
2818
2819 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2820 struct skb_frag_struct *frag;
2821
2822 frag = &skb_shinfo(skb)->frags[f];
2823 len = frag->size;
2824
2825 buffer_info = &tx_ring->buffer_info[i];
2826 BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
2827 buffer_info->length = len;
2828 buffer_info->time_stamp = jiffies;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002829 buffer_info->next_to_watch = i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002830 buffer_info->dma = pci_map_page(adapter->pdev,
2831 frag->page,
2832 frag->page_offset,
2833 len,
2834 PCI_DMA_TODEVICE);
2835
2836 count++;
2837 i++;
2838 if (i == tx_ring->count)
2839 i = 0;
2840 }
2841
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002842 i = ((i == 0) ? tx_ring->count - 1 : i - 1);
Auke Kok9d5c8242008-01-24 02:22:38 -08002843 tx_ring->buffer_info[i].skb = skb;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002844 tx_ring->buffer_info[first].next_to_watch = i;
Auke Kok9d5c8242008-01-24 02:22:38 -08002845
2846 return count;
2847}
2848
2849static inline void igb_tx_queue_adv(struct igb_adapter *adapter,
2850 struct igb_ring *tx_ring,
2851 int tx_flags, int count, u32 paylen,
2852 u8 hdr_len)
2853{
2854 union e1000_adv_tx_desc *tx_desc = NULL;
2855 struct igb_buffer *buffer_info;
2856 u32 olinfo_status = 0, cmd_type_len;
2857 unsigned int i;
2858
2859 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2860 E1000_ADVTXD_DCMD_DEXT);
2861
2862 if (tx_flags & IGB_TX_FLAGS_VLAN)
2863 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2864
2865 if (tx_flags & IGB_TX_FLAGS_TSO) {
2866 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2867
2868 /* insert tcp checksum */
2869 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2870
2871 /* insert ip checksum */
2872 if (tx_flags & IGB_TX_FLAGS_IPV4)
2873 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2874
2875 } else if (tx_flags & IGB_TX_FLAGS_CSUM) {
2876 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2877 }
2878
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07002879 if ((adapter->flags & IGB_FLAG_NEED_CTX_IDX) &&
2880 (tx_flags & (IGB_TX_FLAGS_CSUM | IGB_TX_FLAGS_TSO |
2881 IGB_TX_FLAGS_VLAN)))
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07002882 olinfo_status |= tx_ring->queue_index << 4;
Auke Kok9d5c8242008-01-24 02:22:38 -08002883
2884 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2885
2886 i = tx_ring->next_to_use;
2887 while (count--) {
2888 buffer_info = &tx_ring->buffer_info[i];
2889 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
2890 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2891 tx_desc->read.cmd_type_len =
2892 cpu_to_le32(cmd_type_len | buffer_info->length);
2893 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2894 i++;
2895 if (i == tx_ring->count)
2896 i = 0;
2897 }
2898
2899 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2900 /* Force memory writes to complete before letting h/w
2901 * know there are new descriptors to fetch. (Only
2902 * applicable for weak-ordered memory model archs,
2903 * such as IA-64). */
2904 wmb();
2905
2906 tx_ring->next_to_use = i;
2907 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2908 /* we need this if more than one processor can write to our tail
2909 * at a time, it syncronizes IO on IA64/Altix systems */
2910 mmiowb();
2911}
2912
2913static int __igb_maybe_stop_tx(struct net_device *netdev,
2914 struct igb_ring *tx_ring, int size)
2915{
2916 struct igb_adapter *adapter = netdev_priv(netdev);
2917
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07002918 netif_stop_subqueue(netdev, tx_ring->queue_index);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07002919
Auke Kok9d5c8242008-01-24 02:22:38 -08002920 /* Herbert's original patch had:
2921 * smp_mb__after_netif_stop_queue();
2922 * but since that doesn't exist yet, just open code it. */
2923 smp_mb();
2924
2925 /* We need to check again in a case another CPU has just
2926 * made room available. */
2927 if (IGB_DESC_UNUSED(tx_ring) < size)
2928 return -EBUSY;
2929
2930 /* A reprieve! */
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07002931 netif_wake_subqueue(netdev, tx_ring->queue_index);
Auke Kok9d5c8242008-01-24 02:22:38 -08002932 ++adapter->restart_queue;
2933 return 0;
2934}
2935
2936static int igb_maybe_stop_tx(struct net_device *netdev,
2937 struct igb_ring *tx_ring, int size)
2938{
2939 if (IGB_DESC_UNUSED(tx_ring) >= size)
2940 return 0;
2941 return __igb_maybe_stop_tx(netdev, tx_ring, size);
2942}
2943
2944#define TXD_USE_COUNT(S) (((S) >> (IGB_MAX_TXD_PWR)) + 1)
2945
2946static int igb_xmit_frame_ring_adv(struct sk_buff *skb,
2947 struct net_device *netdev,
2948 struct igb_ring *tx_ring)
2949{
2950 struct igb_adapter *adapter = netdev_priv(netdev);
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002951 unsigned int first;
Auke Kok9d5c8242008-01-24 02:22:38 -08002952 unsigned int tx_flags = 0;
2953 unsigned int len;
Auke Kok9d5c8242008-01-24 02:22:38 -08002954 u8 hdr_len = 0;
2955 int tso = 0;
2956
2957 len = skb_headlen(skb);
2958
2959 if (test_bit(__IGB_DOWN, &adapter->state)) {
2960 dev_kfree_skb_any(skb);
2961 return NETDEV_TX_OK;
2962 }
2963
2964 if (skb->len <= 0) {
2965 dev_kfree_skb_any(skb);
2966 return NETDEV_TX_OK;
2967 }
2968
Auke Kok9d5c8242008-01-24 02:22:38 -08002969 /* need: 1 descriptor per page,
2970 * + 2 desc gap to keep tail from touching head,
2971 * + 1 desc for skb->data,
2972 * + 1 desc for context descriptor,
2973 * otherwise try next time */
2974 if (igb_maybe_stop_tx(netdev, tx_ring, skb_shinfo(skb)->nr_frags + 4)) {
2975 /* this is a hard error */
Auke Kok9d5c8242008-01-24 02:22:38 -08002976 return NETDEV_TX_BUSY;
2977 }
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07002978 skb_orphan(skb);
Auke Kok9d5c8242008-01-24 02:22:38 -08002979
2980 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2981 tx_flags |= IGB_TX_FLAGS_VLAN;
2982 tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT);
2983 }
2984
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07002985 if (skb->protocol == htons(ETH_P_IP))
2986 tx_flags |= IGB_TX_FLAGS_IPV4;
2987
Alexander Duyck0e014cb2008-12-26 01:33:18 -08002988 first = tx_ring->next_to_use;
2989
Auke Kok9d5c8242008-01-24 02:22:38 -08002990 tso = skb_is_gso(skb) ? igb_tso_adv(adapter, tx_ring, skb, tx_flags,
2991 &hdr_len) : 0;
2992
2993 if (tso < 0) {
2994 dev_kfree_skb_any(skb);
Auke Kok9d5c8242008-01-24 02:22:38 -08002995 return NETDEV_TX_OK;
2996 }
2997
2998 if (tso)
2999 tx_flags |= IGB_TX_FLAGS_TSO;
3000 else if (igb_tx_csum_adv(adapter, tx_ring, skb, tx_flags))
3001 if (skb->ip_summed == CHECKSUM_PARTIAL)
3002 tx_flags |= IGB_TX_FLAGS_CSUM;
3003
Auke Kok9d5c8242008-01-24 02:22:38 -08003004 igb_tx_queue_adv(adapter, tx_ring, tx_flags,
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003005 igb_tx_map_adv(adapter, tx_ring, skb, first),
Auke Kok9d5c8242008-01-24 02:22:38 -08003006 skb->len, hdr_len);
3007
3008 netdev->trans_start = jiffies;
3009
3010 /* Make sure there is space in the ring for the next send. */
3011 igb_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 4);
3012
Auke Kok9d5c8242008-01-24 02:22:38 -08003013 return NETDEV_TX_OK;
3014}
3015
3016static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *netdev)
3017{
3018 struct igb_adapter *adapter = netdev_priv(netdev);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003019 struct igb_ring *tx_ring;
3020
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003021 int r_idx = 0;
3022 r_idx = skb->queue_mapping & (IGB_MAX_TX_QUEUES - 1);
3023 tx_ring = adapter->multi_tx_table[r_idx];
Auke Kok9d5c8242008-01-24 02:22:38 -08003024
3025 /* This goes back to the question of how to logically map a tx queue
3026 * to a flow. Right now, performance is impacted slightly negatively
3027 * if using multiple tx queues. If the stack breaks away from a
3028 * single qdisc implementation, we can look at this again. */
3029 return (igb_xmit_frame_ring_adv(skb, netdev, tx_ring));
3030}
3031
3032/**
3033 * igb_tx_timeout - Respond to a Tx Hang
3034 * @netdev: network interface device structure
3035 **/
3036static void igb_tx_timeout(struct net_device *netdev)
3037{
3038 struct igb_adapter *adapter = netdev_priv(netdev);
3039 struct e1000_hw *hw = &adapter->hw;
3040
3041 /* Do the reset outside of interrupt context */
3042 adapter->tx_timeout_count++;
3043 schedule_work(&adapter->reset_task);
3044 wr32(E1000_EICS, adapter->eims_enable_mask &
3045 ~(E1000_EIMS_TCP_TIMER | E1000_EIMS_OTHER));
3046}
3047
3048static void igb_reset_task(struct work_struct *work)
3049{
3050 struct igb_adapter *adapter;
3051 adapter = container_of(work, struct igb_adapter, reset_task);
3052
3053 igb_reinit_locked(adapter);
3054}
3055
3056/**
3057 * igb_get_stats - Get System Network Statistics
3058 * @netdev: network interface device structure
3059 *
3060 * Returns the address of the device statistics structure.
3061 * The statistics are actually updated from the timer callback.
3062 **/
3063static struct net_device_stats *
3064igb_get_stats(struct net_device *netdev)
3065{
3066 struct igb_adapter *adapter = netdev_priv(netdev);
3067
3068 /* only return the current stats */
3069 return &adapter->net_stats;
3070}
3071
3072/**
3073 * igb_change_mtu - Change the Maximum Transfer Unit
3074 * @netdev: network interface device structure
3075 * @new_mtu: new value for maximum frame size
3076 *
3077 * Returns 0 on success, negative on failure
3078 **/
3079static int igb_change_mtu(struct net_device *netdev, int new_mtu)
3080{
3081 struct igb_adapter *adapter = netdev_priv(netdev);
3082 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3083
3084 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
3085 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3086 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
3087 return -EINVAL;
3088 }
3089
3090#define MAX_STD_JUMBO_FRAME_SIZE 9234
3091 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3092 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
3093 return -EINVAL;
3094 }
3095
3096 while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
3097 msleep(1);
3098 /* igb_down has a dependency on max_frame_size */
3099 adapter->max_frame_size = max_frame;
3100 if (netif_running(netdev))
3101 igb_down(adapter);
3102
3103 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3104 * means we reserve 2 more, this pushes us to allocate from the next
3105 * larger slab size.
3106 * i.e. RXBUFFER_2048 --> size-4096 slab
3107 */
3108
3109 if (max_frame <= IGB_RXBUFFER_256)
3110 adapter->rx_buffer_len = IGB_RXBUFFER_256;
3111 else if (max_frame <= IGB_RXBUFFER_512)
3112 adapter->rx_buffer_len = IGB_RXBUFFER_512;
3113 else if (max_frame <= IGB_RXBUFFER_1024)
3114 adapter->rx_buffer_len = IGB_RXBUFFER_1024;
3115 else if (max_frame <= IGB_RXBUFFER_2048)
3116 adapter->rx_buffer_len = IGB_RXBUFFER_2048;
3117 else
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003118#if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
3119 adapter->rx_buffer_len = IGB_RXBUFFER_16384;
3120#else
3121 adapter->rx_buffer_len = PAGE_SIZE / 2;
3122#endif
Auke Kok9d5c8242008-01-24 02:22:38 -08003123 /* adjust allocation if LPE protects us, and we aren't using SBP */
3124 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
3125 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))
3126 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3127
3128 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
3129 netdev->mtu, new_mtu);
3130 netdev->mtu = new_mtu;
3131
3132 if (netif_running(netdev))
3133 igb_up(adapter);
3134 else
3135 igb_reset(adapter);
3136
3137 clear_bit(__IGB_RESETTING, &adapter->state);
3138
3139 return 0;
3140}
3141
3142/**
3143 * igb_update_stats - Update the board statistics counters
3144 * @adapter: board private structure
3145 **/
3146
3147void igb_update_stats(struct igb_adapter *adapter)
3148{
3149 struct e1000_hw *hw = &adapter->hw;
3150 struct pci_dev *pdev = adapter->pdev;
3151 u16 phy_tmp;
3152
3153#define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3154
3155 /*
3156 * Prevent stats update while adapter is being reset, or if the pci
3157 * connection is down.
3158 */
3159 if (adapter->link_speed == 0)
3160 return;
3161 if (pci_channel_offline(pdev))
3162 return;
3163
3164 adapter->stats.crcerrs += rd32(E1000_CRCERRS);
3165 adapter->stats.gprc += rd32(E1000_GPRC);
3166 adapter->stats.gorc += rd32(E1000_GORCL);
3167 rd32(E1000_GORCH); /* clear GORCL */
3168 adapter->stats.bprc += rd32(E1000_BPRC);
3169 adapter->stats.mprc += rd32(E1000_MPRC);
3170 adapter->stats.roc += rd32(E1000_ROC);
3171
3172 adapter->stats.prc64 += rd32(E1000_PRC64);
3173 adapter->stats.prc127 += rd32(E1000_PRC127);
3174 adapter->stats.prc255 += rd32(E1000_PRC255);
3175 adapter->stats.prc511 += rd32(E1000_PRC511);
3176 adapter->stats.prc1023 += rd32(E1000_PRC1023);
3177 adapter->stats.prc1522 += rd32(E1000_PRC1522);
3178 adapter->stats.symerrs += rd32(E1000_SYMERRS);
3179 adapter->stats.sec += rd32(E1000_SEC);
3180
3181 adapter->stats.mpc += rd32(E1000_MPC);
3182 adapter->stats.scc += rd32(E1000_SCC);
3183 adapter->stats.ecol += rd32(E1000_ECOL);
3184 adapter->stats.mcc += rd32(E1000_MCC);
3185 adapter->stats.latecol += rd32(E1000_LATECOL);
3186 adapter->stats.dc += rd32(E1000_DC);
3187 adapter->stats.rlec += rd32(E1000_RLEC);
3188 adapter->stats.xonrxc += rd32(E1000_XONRXC);
3189 adapter->stats.xontxc += rd32(E1000_XONTXC);
3190 adapter->stats.xoffrxc += rd32(E1000_XOFFRXC);
3191 adapter->stats.xofftxc += rd32(E1000_XOFFTXC);
3192 adapter->stats.fcruc += rd32(E1000_FCRUC);
3193 adapter->stats.gptc += rd32(E1000_GPTC);
3194 adapter->stats.gotc += rd32(E1000_GOTCL);
3195 rd32(E1000_GOTCH); /* clear GOTCL */
3196 adapter->stats.rnbc += rd32(E1000_RNBC);
3197 adapter->stats.ruc += rd32(E1000_RUC);
3198 adapter->stats.rfc += rd32(E1000_RFC);
3199 adapter->stats.rjc += rd32(E1000_RJC);
3200 adapter->stats.tor += rd32(E1000_TORH);
3201 adapter->stats.tot += rd32(E1000_TOTH);
3202 adapter->stats.tpr += rd32(E1000_TPR);
3203
3204 adapter->stats.ptc64 += rd32(E1000_PTC64);
3205 adapter->stats.ptc127 += rd32(E1000_PTC127);
3206 adapter->stats.ptc255 += rd32(E1000_PTC255);
3207 adapter->stats.ptc511 += rd32(E1000_PTC511);
3208 adapter->stats.ptc1023 += rd32(E1000_PTC1023);
3209 adapter->stats.ptc1522 += rd32(E1000_PTC1522);
3210
3211 adapter->stats.mptc += rd32(E1000_MPTC);
3212 adapter->stats.bptc += rd32(E1000_BPTC);
3213
3214 /* used for adaptive IFS */
3215
3216 hw->mac.tx_packet_delta = rd32(E1000_TPT);
3217 adapter->stats.tpt += hw->mac.tx_packet_delta;
3218 hw->mac.collision_delta = rd32(E1000_COLC);
3219 adapter->stats.colc += hw->mac.collision_delta;
3220
3221 adapter->stats.algnerrc += rd32(E1000_ALGNERRC);
3222 adapter->stats.rxerrc += rd32(E1000_RXERRC);
3223 adapter->stats.tncrs += rd32(E1000_TNCRS);
3224 adapter->stats.tsctc += rd32(E1000_TSCTC);
3225 adapter->stats.tsctfc += rd32(E1000_TSCTFC);
3226
3227 adapter->stats.iac += rd32(E1000_IAC);
3228 adapter->stats.icrxoc += rd32(E1000_ICRXOC);
3229 adapter->stats.icrxptc += rd32(E1000_ICRXPTC);
3230 adapter->stats.icrxatc += rd32(E1000_ICRXATC);
3231 adapter->stats.ictxptc += rd32(E1000_ICTXPTC);
3232 adapter->stats.ictxatc += rd32(E1000_ICTXATC);
3233 adapter->stats.ictxqec += rd32(E1000_ICTXQEC);
3234 adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC);
3235 adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC);
3236
3237 /* Fill out the OS statistics structure */
3238 adapter->net_stats.multicast = adapter->stats.mprc;
3239 adapter->net_stats.collisions = adapter->stats.colc;
3240
3241 /* Rx Errors */
3242
3243 /* RLEC on some newer hardware can be incorrect so build
3244 * our own version based on RUC and ROC */
3245 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3246 adapter->stats.crcerrs + adapter->stats.algnerrc +
3247 adapter->stats.ruc + adapter->stats.roc +
3248 adapter->stats.cexterr;
3249 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3250 adapter->stats.roc;
3251 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3252 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3253 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3254
3255 /* Tx Errors */
3256 adapter->net_stats.tx_errors = adapter->stats.ecol +
3257 adapter->stats.latecol;
3258 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3259 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3260 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3261
3262 /* Tx Dropped needs to be maintained elsewhere */
3263
3264 /* Phy Stats */
3265 if (hw->phy.media_type == e1000_media_type_copper) {
3266 if ((adapter->link_speed == SPEED_1000) &&
Alexander Duyckf5f4cf02008-11-21 21:30:24 -08003267 (!igb_read_phy_reg(hw, PHY_1000T_STATUS,
Auke Kok9d5c8242008-01-24 02:22:38 -08003268 &phy_tmp))) {
3269 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3270 adapter->phy_stats.idle_errors += phy_tmp;
3271 }
3272 }
3273
3274 /* Management Stats */
3275 adapter->stats.mgptc += rd32(E1000_MGTPTC);
3276 adapter->stats.mgprc += rd32(E1000_MGTPRC);
3277 adapter->stats.mgpdc += rd32(E1000_MGTPDC);
3278}
3279
3280
3281static irqreturn_t igb_msix_other(int irq, void *data)
3282{
3283 struct net_device *netdev = data;
3284 struct igb_adapter *adapter = netdev_priv(netdev);
3285 struct e1000_hw *hw = &adapter->hw;
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003286 u32 icr = rd32(E1000_ICR);
Auke Kok9d5c8242008-01-24 02:22:38 -08003287
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003288 /* reading ICR causes bit 31 of EICR to be cleared */
3289 if (!(icr & E1000_ICR_LSC))
3290 goto no_link_interrupt;
3291 hw->mac.get_link_status = 1;
3292 /* guard against interrupt when we're going down */
3293 if (!test_bit(__IGB_DOWN, &adapter->state))
3294 mod_timer(&adapter->watchdog_timer, jiffies + 1);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003295
Auke Kok9d5c8242008-01-24 02:22:38 -08003296no_link_interrupt:
3297 wr32(E1000_IMS, E1000_IMS_LSC);
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003298 wr32(E1000_EIMS, adapter->eims_other);
Auke Kok9d5c8242008-01-24 02:22:38 -08003299
3300 return IRQ_HANDLED;
3301}
3302
3303static irqreturn_t igb_msix_tx(int irq, void *data)
3304{
3305 struct igb_ring *tx_ring = data;
3306 struct igb_adapter *adapter = tx_ring->adapter;
3307 struct e1000_hw *hw = &adapter->hw;
3308
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003309#ifdef CONFIG_IGB_DCA
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003310 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003311 igb_update_tx_dca(tx_ring);
3312#endif
Auke Kok9d5c8242008-01-24 02:22:38 -08003313 tx_ring->total_bytes = 0;
3314 tx_ring->total_packets = 0;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003315
3316 /* auto mask will automatically reenable the interrupt when we write
3317 * EICS */
Mitch Williams3b644cf2008-06-27 10:59:48 -07003318 if (!igb_clean_tx_irq(tx_ring))
Auke Kok9d5c8242008-01-24 02:22:38 -08003319 /* Ring was not completely cleaned, so fire another interrupt */
3320 wr32(E1000_EICS, tx_ring->eims_value);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003321 else
Auke Kok9d5c8242008-01-24 02:22:38 -08003322 wr32(E1000_EIMS, tx_ring->eims_value);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003323
Auke Kok9d5c8242008-01-24 02:22:38 -08003324 return IRQ_HANDLED;
3325}
3326
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003327static void igb_write_itr(struct igb_ring *ring)
3328{
3329 struct e1000_hw *hw = &ring->adapter->hw;
3330 if ((ring->adapter->itr_setting & 3) && ring->set_itr) {
3331 switch (hw->mac.type) {
3332 case e1000_82576:
3333 wr32(ring->itr_register,
3334 ring->itr_val |
3335 0x80000000);
3336 break;
3337 default:
3338 wr32(ring->itr_register,
3339 ring->itr_val |
3340 (ring->itr_val << 16));
3341 break;
3342 }
3343 ring->set_itr = 0;
3344 }
3345}
3346
Auke Kok9d5c8242008-01-24 02:22:38 -08003347static irqreturn_t igb_msix_rx(int irq, void *data)
3348{
3349 struct igb_ring *rx_ring = data;
Auke Kok9d5c8242008-01-24 02:22:38 -08003350
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003351 /* Write the ITR value calculated at the end of the
3352 * previous interrupt.
3353 */
Auke Kok9d5c8242008-01-24 02:22:38 -08003354
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003355 igb_write_itr(rx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08003356
Ben Hutchings288379f2009-01-19 16:43:59 -08003357 if (napi_schedule_prep(&rx_ring->napi))
3358 __napi_schedule(&rx_ring->napi);
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003359
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003360#ifdef CONFIG_IGB_DCA
David S. Miller8d253322008-12-26 15:13:55 -08003361 if (rx_ring->adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003362 igb_update_rx_dca(rx_ring);
3363#endif
3364 return IRQ_HANDLED;
Auke Kok9d5c8242008-01-24 02:22:38 -08003365}
3366
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003367#ifdef CONFIG_IGB_DCA
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003368static void igb_update_rx_dca(struct igb_ring *rx_ring)
3369{
3370 u32 dca_rxctrl;
3371 struct igb_adapter *adapter = rx_ring->adapter;
3372 struct e1000_hw *hw = &adapter->hw;
3373 int cpu = get_cpu();
Alexander Duyck26bc19e2008-12-26 01:34:11 -08003374 int q = rx_ring->reg_idx;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003375
3376 if (rx_ring->cpu != cpu) {
3377 dca_rxctrl = rd32(E1000_DCA_RXCTRL(q));
Alexander Duyck2d064c02008-07-08 15:10:12 -07003378 if (hw->mac.type == e1000_82576) {
3379 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK_82576;
3380 dca_rxctrl |= dca_get_tag(cpu) <<
3381 E1000_DCA_RXCTRL_CPUID_SHIFT;
3382 } else {
3383 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK;
3384 dca_rxctrl |= dca_get_tag(cpu);
3385 }
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003386 dca_rxctrl |= E1000_DCA_RXCTRL_DESC_DCA_EN;
3387 dca_rxctrl |= E1000_DCA_RXCTRL_HEAD_DCA_EN;
3388 dca_rxctrl |= E1000_DCA_RXCTRL_DATA_DCA_EN;
3389 wr32(E1000_DCA_RXCTRL(q), dca_rxctrl);
3390 rx_ring->cpu = cpu;
3391 }
3392 put_cpu();
3393}
3394
3395static void igb_update_tx_dca(struct igb_ring *tx_ring)
3396{
3397 u32 dca_txctrl;
3398 struct igb_adapter *adapter = tx_ring->adapter;
3399 struct e1000_hw *hw = &adapter->hw;
3400 int cpu = get_cpu();
Alexander Duyck26bc19e2008-12-26 01:34:11 -08003401 int q = tx_ring->reg_idx;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003402
3403 if (tx_ring->cpu != cpu) {
3404 dca_txctrl = rd32(E1000_DCA_TXCTRL(q));
Alexander Duyck2d064c02008-07-08 15:10:12 -07003405 if (hw->mac.type == e1000_82576) {
3406 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK_82576;
3407 dca_txctrl |= dca_get_tag(cpu) <<
3408 E1000_DCA_TXCTRL_CPUID_SHIFT;
3409 } else {
3410 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK;
3411 dca_txctrl |= dca_get_tag(cpu);
3412 }
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003413 dca_txctrl |= E1000_DCA_TXCTRL_DESC_DCA_EN;
3414 wr32(E1000_DCA_TXCTRL(q), dca_txctrl);
3415 tx_ring->cpu = cpu;
3416 }
3417 put_cpu();
3418}
3419
3420static void igb_setup_dca(struct igb_adapter *adapter)
3421{
3422 int i;
3423
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003424 if (!(adapter->flags & IGB_FLAG_DCA_ENABLED))
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003425 return;
3426
3427 for (i = 0; i < adapter->num_tx_queues; i++) {
3428 adapter->tx_ring[i].cpu = -1;
3429 igb_update_tx_dca(&adapter->tx_ring[i]);
3430 }
3431 for (i = 0; i < adapter->num_rx_queues; i++) {
3432 adapter->rx_ring[i].cpu = -1;
3433 igb_update_rx_dca(&adapter->rx_ring[i]);
3434 }
3435}
3436
3437static int __igb_notify_dca(struct device *dev, void *data)
3438{
3439 struct net_device *netdev = dev_get_drvdata(dev);
3440 struct igb_adapter *adapter = netdev_priv(netdev);
3441 struct e1000_hw *hw = &adapter->hw;
3442 unsigned long event = *(unsigned long *)data;
3443
3444 switch (event) {
3445 case DCA_PROVIDER_ADD:
3446 /* if already enabled, don't do it again */
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003447 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003448 break;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003449 /* Always use CB2 mode, difference is masked
3450 * in the CB driver. */
3451 wr32(E1000_DCA_CTRL, 2);
3452 if (dca_add_requester(dev) == 0) {
Alexander Duyckbbd98fe2009-01-31 00:52:30 -08003453 adapter->flags |= IGB_FLAG_DCA_ENABLED;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003454 dev_info(&adapter->pdev->dev, "DCA enabled\n");
3455 igb_setup_dca(adapter);
3456 break;
3457 }
3458 /* Fall Through since DCA is disabled. */
3459 case DCA_PROVIDER_REMOVE:
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003460 if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003461 /* without this a class_device is left
3462 * hanging around in the sysfs model */
3463 dca_remove_requester(dev);
3464 dev_info(&adapter->pdev->dev, "DCA disabled\n");
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003465 adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003466 wr32(E1000_DCA_CTRL, 1);
3467 }
3468 break;
3469 }
Alexander Duyckbbd98fe2009-01-31 00:52:30 -08003470
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003471 return 0;
3472}
3473
3474static int igb_notify_dca(struct notifier_block *nb, unsigned long event,
3475 void *p)
3476{
3477 int ret_val;
3478
3479 ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event,
3480 __igb_notify_dca);
3481
3482 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
3483}
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003484#endif /* CONFIG_IGB_DCA */
Auke Kok9d5c8242008-01-24 02:22:38 -08003485
3486/**
3487 * igb_intr_msi - Interrupt Handler
3488 * @irq: interrupt number
3489 * @data: pointer to a network interface device structure
3490 **/
3491static irqreturn_t igb_intr_msi(int irq, void *data)
3492{
3493 struct net_device *netdev = data;
3494 struct igb_adapter *adapter = netdev_priv(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08003495 struct e1000_hw *hw = &adapter->hw;
3496 /* read ICR disables interrupts using IAM */
3497 u32 icr = rd32(E1000_ICR);
3498
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003499 igb_write_itr(adapter->rx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08003500
Auke Kok9d5c8242008-01-24 02:22:38 -08003501 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3502 hw->mac.get_link_status = 1;
3503 if (!test_bit(__IGB_DOWN, &adapter->state))
3504 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3505 }
3506
Ben Hutchings288379f2009-01-19 16:43:59 -08003507 napi_schedule(&adapter->rx_ring[0].napi);
Auke Kok9d5c8242008-01-24 02:22:38 -08003508
3509 return IRQ_HANDLED;
3510}
3511
3512/**
3513 * igb_intr - Interrupt Handler
3514 * @irq: interrupt number
3515 * @data: pointer to a network interface device structure
3516 **/
3517static irqreturn_t igb_intr(int irq, void *data)
3518{
3519 struct net_device *netdev = data;
3520 struct igb_adapter *adapter = netdev_priv(netdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08003521 struct e1000_hw *hw = &adapter->hw;
3522 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3523 * need for the IMC write */
3524 u32 icr = rd32(E1000_ICR);
3525 u32 eicr = 0;
3526 if (!icr)
3527 return IRQ_NONE; /* Not our interrupt */
3528
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003529 igb_write_itr(adapter->rx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08003530
3531 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3532 * not set, then the adapter didn't send an interrupt */
3533 if (!(icr & E1000_ICR_INT_ASSERTED))
3534 return IRQ_NONE;
3535
3536 eicr = rd32(E1000_EICR);
3537
3538 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3539 hw->mac.get_link_status = 1;
3540 /* guard against interrupt when we're going down */
3541 if (!test_bit(__IGB_DOWN, &adapter->state))
3542 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3543 }
3544
Ben Hutchings288379f2009-01-19 16:43:59 -08003545 napi_schedule(&adapter->rx_ring[0].napi);
Auke Kok9d5c8242008-01-24 02:22:38 -08003546
3547 return IRQ_HANDLED;
3548}
3549
3550/**
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003551 * igb_poll - NAPI Rx polling callback
3552 * @napi: napi polling structure
3553 * @budget: count of how many packets we should handle
Auke Kok9d5c8242008-01-24 02:22:38 -08003554 **/
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003555static int igb_poll(struct napi_struct *napi, int budget)
Auke Kok9d5c8242008-01-24 02:22:38 -08003556{
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003557 struct igb_ring *rx_ring = container_of(napi, struct igb_ring, napi);
3558 struct igb_adapter *adapter = rx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08003559 struct net_device *netdev = adapter->netdev;
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003560 int tx_clean_complete, work_done = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08003561
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003562 /* this poll routine only supports one tx and one rx queue */
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003563#ifdef CONFIG_IGB_DCA
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003564 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003565 igb_update_tx_dca(&adapter->tx_ring[0]);
3566#endif
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003567 tx_clean_complete = igb_clean_tx_irq(&adapter->tx_ring[0]);
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003568
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003569#ifdef CONFIG_IGB_DCA
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003570 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003571 igb_update_rx_dca(&adapter->rx_ring[0]);
3572#endif
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003573 igb_clean_rx_irq_adv(&adapter->rx_ring[0], &work_done, budget);
Auke Kok9d5c8242008-01-24 02:22:38 -08003574
3575 /* If no Tx and not enough Rx work done, exit the polling mode */
3576 if ((tx_clean_complete && (work_done < budget)) ||
3577 !netif_running(netdev)) {
Auke Kok9d5c8242008-01-24 02:22:38 -08003578 if (adapter->itr_setting & 3)
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003579 igb_set_itr(adapter);
Ben Hutchings288379f2009-01-19 16:43:59 -08003580 napi_complete(napi);
Auke Kok9d5c8242008-01-24 02:22:38 -08003581 if (!test_bit(__IGB_DOWN, &adapter->state))
3582 igb_irq_enable(adapter);
3583 return 0;
3584 }
3585
3586 return 1;
3587}
3588
3589static int igb_clean_rx_ring_msix(struct napi_struct *napi, int budget)
3590{
3591 struct igb_ring *rx_ring = container_of(napi, struct igb_ring, napi);
3592 struct igb_adapter *adapter = rx_ring->adapter;
3593 struct e1000_hw *hw = &adapter->hw;
3594 struct net_device *netdev = adapter->netdev;
3595 int work_done = 0;
3596
Jeff Kirsher421e02f2008-10-17 11:08:31 -07003597#ifdef CONFIG_IGB_DCA
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07003598 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
Jeb Cramerfe4506b2008-07-08 15:07:55 -07003599 igb_update_rx_dca(rx_ring);
3600#endif
Mitch Williams3b644cf2008-06-27 10:59:48 -07003601 igb_clean_rx_irq_adv(rx_ring, &work_done, budget);
Auke Kok9d5c8242008-01-24 02:22:38 -08003602
3603
3604 /* If not enough Rx work done, exit the polling mode */
3605 if ((work_done == 0) || !netif_running(netdev)) {
Ben Hutchings288379f2009-01-19 16:43:59 -08003606 napi_complete(napi);
Auke Kok9d5c8242008-01-24 02:22:38 -08003607
Alexander Duyck6eb5a7f2008-07-08 15:14:44 -07003608 if (adapter->itr_setting & 3) {
3609 if (adapter->num_rx_queues == 1)
3610 igb_set_itr(adapter);
3611 else
3612 igb_update_ring_itr(rx_ring);
Auke Kok9d5c8242008-01-24 02:22:38 -08003613 }
PJ Waskiewicz844290e2008-06-27 11:00:39 -07003614
3615 if (!test_bit(__IGB_DOWN, &adapter->state))
3616 wr32(E1000_EIMS, rx_ring->eims_value);
3617
Auke Kok9d5c8242008-01-24 02:22:38 -08003618 return 0;
3619 }
3620
3621 return 1;
3622}
Al Viro6d8126f2008-03-16 22:23:24 +00003623
Auke Kok9d5c8242008-01-24 02:22:38 -08003624/**
3625 * igb_clean_tx_irq - Reclaim resources after transmit completes
3626 * @adapter: board private structure
3627 * returns true if ring is completely cleaned
3628 **/
Mitch Williams3b644cf2008-06-27 10:59:48 -07003629static bool igb_clean_tx_irq(struct igb_ring *tx_ring)
Auke Kok9d5c8242008-01-24 02:22:38 -08003630{
Mitch Williams3b644cf2008-06-27 10:59:48 -07003631 struct igb_adapter *adapter = tx_ring->adapter;
Mitch Williams3b644cf2008-06-27 10:59:48 -07003632 struct net_device *netdev = adapter->netdev;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003633 struct e1000_hw *hw = &adapter->hw;
Auke Kok9d5c8242008-01-24 02:22:38 -08003634 struct igb_buffer *buffer_info;
3635 struct sk_buff *skb;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003636 union e1000_adv_tx_desc *tx_desc, *eop_desc;
Auke Kok9d5c8242008-01-24 02:22:38 -08003637 unsigned int total_bytes = 0, total_packets = 0;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003638 unsigned int i, eop, count = 0;
3639 bool cleaned = false;
Auke Kok9d5c8242008-01-24 02:22:38 -08003640
Auke Kok9d5c8242008-01-24 02:22:38 -08003641 i = tx_ring->next_to_clean;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003642 eop = tx_ring->buffer_info[i].next_to_watch;
3643 eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
3644
3645 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3646 (count < tx_ring->count)) {
3647 for (cleaned = false; !cleaned; count++) {
3648 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
Auke Kok9d5c8242008-01-24 02:22:38 -08003649 buffer_info = &tx_ring->buffer_info[i];
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003650 cleaned = (i == eop);
Auke Kok9d5c8242008-01-24 02:22:38 -08003651 skb = buffer_info->skb;
3652
3653 if (skb) {
3654 unsigned int segs, bytecount;
3655 /* gso_segs is currently only valid for tcp */
3656 segs = skb_shinfo(skb)->gso_segs ?: 1;
3657 /* multiply data chunks by size of headers */
3658 bytecount = ((segs - 1) * skb_headlen(skb)) +
3659 skb->len;
3660 total_packets += segs;
3661 total_bytes += bytecount;
3662 }
3663
3664 igb_unmap_and_free_tx_resource(adapter, buffer_info);
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003665 tx_desc->wb.status = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08003666
3667 i++;
3668 if (i == tx_ring->count)
3669 i = 0;
Auke Kok9d5c8242008-01-24 02:22:38 -08003670 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003671
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003672 eop = tx_ring->buffer_info[i].next_to_watch;
3673 eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
3674 }
3675
Auke Kok9d5c8242008-01-24 02:22:38 -08003676 tx_ring->next_to_clean = i;
3677
Alexander Duyckfc7d3452008-08-26 04:25:08 -07003678 if (unlikely(count &&
Auke Kok9d5c8242008-01-24 02:22:38 -08003679 netif_carrier_ok(netdev) &&
3680 IGB_DESC_UNUSED(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
3681 /* Make sure that anybody stopping the queue after this
3682 * sees the new next_to_clean.
3683 */
3684 smp_mb();
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003685 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
3686 !(test_bit(__IGB_DOWN, &adapter->state))) {
3687 netif_wake_subqueue(netdev, tx_ring->queue_index);
3688 ++adapter->restart_queue;
3689 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003690 }
3691
3692 if (tx_ring->detect_tx_hung) {
3693 /* Detect a transmit hang in hardware, this serializes the
3694 * check with the clearing of time_stamp and movement of i */
3695 tx_ring->detect_tx_hung = false;
3696 if (tx_ring->buffer_info[i].time_stamp &&
3697 time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
3698 (adapter->tx_timeout_factor * HZ))
3699 && !(rd32(E1000_STATUS) &
3700 E1000_STATUS_TXOFF)) {
3701
Auke Kok9d5c8242008-01-24 02:22:38 -08003702 /* detected Tx unit hang */
3703 dev_err(&adapter->pdev->dev,
3704 "Detected Tx Unit Hang\n"
Alexander Duyck2d064c02008-07-08 15:10:12 -07003705 " Tx Queue <%d>\n"
Auke Kok9d5c8242008-01-24 02:22:38 -08003706 " TDH <%x>\n"
3707 " TDT <%x>\n"
3708 " next_to_use <%x>\n"
3709 " next_to_clean <%x>\n"
Auke Kok9d5c8242008-01-24 02:22:38 -08003710 "buffer_info[next_to_clean]\n"
3711 " time_stamp <%lx>\n"
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003712 " next_to_watch <%x>\n"
Auke Kok9d5c8242008-01-24 02:22:38 -08003713 " jiffies <%lx>\n"
3714 " desc.status <%x>\n",
Alexander Duyck2d064c02008-07-08 15:10:12 -07003715 tx_ring->queue_index,
Auke Kok9d5c8242008-01-24 02:22:38 -08003716 readl(adapter->hw.hw_addr + tx_ring->head),
3717 readl(adapter->hw.hw_addr + tx_ring->tail),
3718 tx_ring->next_to_use,
3719 tx_ring->next_to_clean,
Auke Kok9d5c8242008-01-24 02:22:38 -08003720 tx_ring->buffer_info[i].time_stamp,
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003721 eop,
Auke Kok9d5c8242008-01-24 02:22:38 -08003722 jiffies,
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003723 eop_desc->wb.status);
Peter P Waskiewicz Jr661086d2008-07-08 15:06:51 -07003724 netif_stop_subqueue(netdev, tx_ring->queue_index);
Auke Kok9d5c8242008-01-24 02:22:38 -08003725 }
3726 }
3727 tx_ring->total_bytes += total_bytes;
3728 tx_ring->total_packets += total_packets;
Alexander Duycke21ed352008-07-08 15:07:24 -07003729 tx_ring->tx_stats.bytes += total_bytes;
3730 tx_ring->tx_stats.packets += total_packets;
Auke Kok9d5c8242008-01-24 02:22:38 -08003731 adapter->net_stats.tx_bytes += total_bytes;
3732 adapter->net_stats.tx_packets += total_packets;
Alexander Duyck0e014cb2008-12-26 01:33:18 -08003733 return (count < tx_ring->count);
Auke Kok9d5c8242008-01-24 02:22:38 -08003734}
3735
Auke Kok9d5c8242008-01-24 02:22:38 -08003736/**
3737 * igb_receive_skb - helper function to handle rx indications
Alexander Duyckd3352522008-07-08 15:12:13 -07003738 * @ring: pointer to receive ring receving this packet
Auke Kok9d5c8242008-01-24 02:22:38 -08003739 * @status: descriptor status field as written by hardware
3740 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3741 * @skb: pointer to sk_buff to be indicated to stack
3742 **/
Alexander Duyckd3352522008-07-08 15:12:13 -07003743static void igb_receive_skb(struct igb_ring *ring, u8 status,
3744 union e1000_adv_rx_desc * rx_desc,
3745 struct sk_buff *skb)
Auke Kok9d5c8242008-01-24 02:22:38 -08003746{
Alexander Duyckd3352522008-07-08 15:12:13 -07003747 struct igb_adapter * adapter = ring->adapter;
3748 bool vlan_extracted = (adapter->vlgrp && (status & E1000_RXD_STAT_VP));
3749
David S. Miller0c8dfc82009-01-27 16:22:32 -08003750 skb_record_rx_queue(skb, ring->queue_index);
Herbert Xu5c0999b2009-01-19 15:20:57 -08003751 if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
Alexander Duyckd3352522008-07-08 15:12:13 -07003752 if (vlan_extracted)
Herbert Xu5c0999b2009-01-19 15:20:57 -08003753 vlan_gro_receive(&ring->napi, adapter->vlgrp,
3754 le16_to_cpu(rx_desc->wb.upper.vlan),
3755 skb);
Alexander Duyckd3352522008-07-08 15:12:13 -07003756 else
Herbert Xu5c0999b2009-01-19 15:20:57 -08003757 napi_gro_receive(&ring->napi, skb);
Alexander Duyckd3352522008-07-08 15:12:13 -07003758 } else {
Alexander Duyckd3352522008-07-08 15:12:13 -07003759 if (vlan_extracted)
3760 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3761 le16_to_cpu(rx_desc->wb.upper.vlan));
3762 else
Alexander Duyckd3352522008-07-08 15:12:13 -07003763 netif_receive_skb(skb);
Alexander Duyckd3352522008-07-08 15:12:13 -07003764 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003765}
3766
3767
3768static inline void igb_rx_checksum_adv(struct igb_adapter *adapter,
3769 u32 status_err, struct sk_buff *skb)
3770{
3771 skb->ip_summed = CHECKSUM_NONE;
3772
3773 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
3774 if ((status_err & E1000_RXD_STAT_IXSM) || !adapter->rx_csum)
3775 return;
3776 /* TCP/UDP checksum error bit is set */
3777 if (status_err &
3778 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
3779 /* let the stack verify checksum errors */
3780 adapter->hw_csum_err++;
3781 return;
3782 }
3783 /* It must be a TCP or UDP packet with a valid checksum */
3784 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
3785 skb->ip_summed = CHECKSUM_UNNECESSARY;
3786
3787 adapter->hw_csum_good++;
3788}
3789
Mitch Williams3b644cf2008-06-27 10:59:48 -07003790static bool igb_clean_rx_irq_adv(struct igb_ring *rx_ring,
3791 int *work_done, int budget)
Auke Kok9d5c8242008-01-24 02:22:38 -08003792{
Mitch Williams3b644cf2008-06-27 10:59:48 -07003793 struct igb_adapter *adapter = rx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08003794 struct net_device *netdev = adapter->netdev;
3795 struct pci_dev *pdev = adapter->pdev;
3796 union e1000_adv_rx_desc *rx_desc , *next_rxd;
3797 struct igb_buffer *buffer_info , *next_buffer;
3798 struct sk_buff *skb;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003799 unsigned int i;
Auke Kok9d5c8242008-01-24 02:22:38 -08003800 u32 length, hlen, staterr;
3801 bool cleaned = false;
3802 int cleaned_count = 0;
3803 unsigned int total_bytes = 0, total_packets = 0;
3804
3805 i = rx_ring->next_to_clean;
Alexander Duyck69d3ca52009-02-06 23:15:04 +00003806 buffer_info = &rx_ring->buffer_info[i];
Auke Kok9d5c8242008-01-24 02:22:38 -08003807 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
3808 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
3809
3810 while (staterr & E1000_RXD_STAT_DD) {
3811 if (*work_done >= budget)
3812 break;
3813 (*work_done)++;
Alexander Duyck69d3ca52009-02-06 23:15:04 +00003814
3815 skb = buffer_info->skb;
3816 prefetch(skb->data - NET_IP_ALIGN);
3817 buffer_info->skb = NULL;
3818
3819 i++;
3820 if (i == rx_ring->count)
3821 i = 0;
3822 next_rxd = E1000_RX_DESC_ADV(*rx_ring, i);
3823 prefetch(next_rxd);
3824 next_buffer = &rx_ring->buffer_info[i];
3825
3826 length = le16_to_cpu(rx_desc->wb.upper.length);
3827 cleaned = true;
3828 cleaned_count++;
3829
3830 if (!adapter->rx_ps_hdr_size) {
3831 pci_unmap_single(pdev, buffer_info->dma,
3832 adapter->rx_buffer_len +
3833 NET_IP_ALIGN,
3834 PCI_DMA_FROMDEVICE);
3835 skb_put(skb, length);
3836 goto send_up;
3837 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003838
3839 /* HW will not DMA in data larger than the given buffer, even
3840 * if it parses the (NFS, of course) header to be larger. In
3841 * that case, it fills the header buffer and spills the rest
3842 * into the page.
3843 */
Al Viro7deb07b2008-03-16 22:43:06 +00003844 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) &
3845 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
Auke Kok9d5c8242008-01-24 02:22:38 -08003846 if (hlen > adapter->rx_ps_hdr_size)
3847 hlen = adapter->rx_ps_hdr_size;
3848
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003849 if (!skb_shinfo(skb)->nr_frags) {
3850 pci_unmap_single(pdev, buffer_info->dma,
3851 adapter->rx_ps_hdr_size +
3852 NET_IP_ALIGN,
3853 PCI_DMA_FROMDEVICE);
3854 skb_put(skb, hlen);
3855 }
3856
3857 if (length) {
Auke Kok9d5c8242008-01-24 02:22:38 -08003858 pci_unmap_page(pdev, buffer_info->page_dma,
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003859 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
Auke Kok9d5c8242008-01-24 02:22:38 -08003860 buffer_info->page_dma = 0;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003861
3862 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++,
3863 buffer_info->page,
3864 buffer_info->page_offset,
3865 length);
3866
3867 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
3868 (page_count(buffer_info->page) != 1))
3869 buffer_info->page = NULL;
3870 else
3871 get_page(buffer_info->page);
Auke Kok9d5c8242008-01-24 02:22:38 -08003872
3873 skb->len += length;
3874 skb->data_len += length;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003875
Auke Kok9d5c8242008-01-24 02:22:38 -08003876 skb->truesize += length;
Auke Kok9d5c8242008-01-24 02:22:38 -08003877 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003878
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003879 if (!(staterr & E1000_RXD_STAT_EOP)) {
Alexander Duyckb2d56532008-11-20 00:47:34 -08003880 buffer_info->skb = next_buffer->skb;
3881 buffer_info->dma = next_buffer->dma;
3882 next_buffer->skb = skb;
3883 next_buffer->dma = 0;
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003884 goto next_desc;
3885 }
Alexander Duyck69d3ca52009-02-06 23:15:04 +00003886send_up:
Auke Kok9d5c8242008-01-24 02:22:38 -08003887 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
3888 dev_kfree_skb_irq(skb);
3889 goto next_desc;
3890 }
Auke Kok9d5c8242008-01-24 02:22:38 -08003891
3892 total_bytes += skb->len;
3893 total_packets++;
3894
3895 igb_rx_checksum_adv(adapter, staterr, skb);
3896
3897 skb->protocol = eth_type_trans(skb, netdev);
3898
Alexander Duyckd3352522008-07-08 15:12:13 -07003899 igb_receive_skb(rx_ring, staterr, rx_desc, skb);
Auke Kok9d5c8242008-01-24 02:22:38 -08003900
Auke Kok9d5c8242008-01-24 02:22:38 -08003901next_desc:
3902 rx_desc->wb.upper.status_error = 0;
3903
3904 /* return some buffers to hardware, one at a time is too slow */
3905 if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
Mitch Williams3b644cf2008-06-27 10:59:48 -07003906 igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
Auke Kok9d5c8242008-01-24 02:22:38 -08003907 cleaned_count = 0;
3908 }
3909
3910 /* use prefetched values */
3911 rx_desc = next_rxd;
3912 buffer_info = next_buffer;
Auke Kok9d5c8242008-01-24 02:22:38 -08003913 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
3914 }
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003915
Auke Kok9d5c8242008-01-24 02:22:38 -08003916 rx_ring->next_to_clean = i;
3917 cleaned_count = IGB_DESC_UNUSED(rx_ring);
3918
3919 if (cleaned_count)
Mitch Williams3b644cf2008-06-27 10:59:48 -07003920 igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
Auke Kok9d5c8242008-01-24 02:22:38 -08003921
3922 rx_ring->total_packets += total_packets;
3923 rx_ring->total_bytes += total_bytes;
3924 rx_ring->rx_stats.packets += total_packets;
3925 rx_ring->rx_stats.bytes += total_bytes;
3926 adapter->net_stats.rx_bytes += total_bytes;
3927 adapter->net_stats.rx_packets += total_packets;
3928 return cleaned;
3929}
3930
3931
3932/**
3933 * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
3934 * @adapter: address of board private structure
3935 **/
Mitch Williams3b644cf2008-06-27 10:59:48 -07003936static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
Auke Kok9d5c8242008-01-24 02:22:38 -08003937 int cleaned_count)
3938{
Mitch Williams3b644cf2008-06-27 10:59:48 -07003939 struct igb_adapter *adapter = rx_ring->adapter;
Auke Kok9d5c8242008-01-24 02:22:38 -08003940 struct net_device *netdev = adapter->netdev;
3941 struct pci_dev *pdev = adapter->pdev;
3942 union e1000_adv_rx_desc *rx_desc;
3943 struct igb_buffer *buffer_info;
3944 struct sk_buff *skb;
3945 unsigned int i;
Alexander Duyckdb761762009-02-06 23:15:25 +00003946 int bufsz;
Auke Kok9d5c8242008-01-24 02:22:38 -08003947
3948 i = rx_ring->next_to_use;
3949 buffer_info = &rx_ring->buffer_info[i];
3950
Alexander Duyckdb761762009-02-06 23:15:25 +00003951 if (adapter->rx_ps_hdr_size)
3952 bufsz = adapter->rx_ps_hdr_size;
3953 else
3954 bufsz = adapter->rx_buffer_len;
3955 bufsz += NET_IP_ALIGN;
3956
Auke Kok9d5c8242008-01-24 02:22:38 -08003957 while (cleaned_count--) {
3958 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
3959
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003960 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
Auke Kok9d5c8242008-01-24 02:22:38 -08003961 if (!buffer_info->page) {
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003962 buffer_info->page = alloc_page(GFP_ATOMIC);
3963 if (!buffer_info->page) {
3964 adapter->alloc_rx_buff_failed++;
3965 goto no_buffers;
3966 }
3967 buffer_info->page_offset = 0;
3968 } else {
3969 buffer_info->page_offset ^= PAGE_SIZE / 2;
Auke Kok9d5c8242008-01-24 02:22:38 -08003970 }
3971 buffer_info->page_dma =
Alexander Duyckdb761762009-02-06 23:15:25 +00003972 pci_map_page(pdev, buffer_info->page,
Alexander Duyckbf36c1a2008-07-08 15:11:40 -07003973 buffer_info->page_offset,
3974 PAGE_SIZE / 2,
Auke Kok9d5c8242008-01-24 02:22:38 -08003975 PCI_DMA_FROMDEVICE);
3976 }
3977
3978 if (!buffer_info->skb) {
Auke Kok9d5c8242008-01-24 02:22:38 -08003979 skb = netdev_alloc_skb(netdev, bufsz);
Auke Kok9d5c8242008-01-24 02:22:38 -08003980 if (!skb) {
3981 adapter->alloc_rx_buff_failed++;
3982 goto no_buffers;
3983 }
3984
3985 /* Make buffer alignment 2 beyond a 16 byte boundary
3986 * this will result in a 16 byte aligned IP header after
3987 * the 14 byte MAC header is removed
3988 */
3989 skb_reserve(skb, NET_IP_ALIGN);
3990
3991 buffer_info->skb = skb;
3992 buffer_info->dma = pci_map_single(pdev, skb->data,
3993 bufsz,
3994 PCI_DMA_FROMDEVICE);
Auke Kok9d5c8242008-01-24 02:22:38 -08003995 }
3996 /* Refresh the desc even if buffer_addrs didn't change because
3997 * each write-back erases this info. */
3998 if (adapter->rx_ps_hdr_size) {
3999 rx_desc->read.pkt_addr =
4000 cpu_to_le64(buffer_info->page_dma);
4001 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
4002 } else {
4003 rx_desc->read.pkt_addr =
4004 cpu_to_le64(buffer_info->dma);
4005 rx_desc->read.hdr_addr = 0;
4006 }
4007
4008 i++;
4009 if (i == rx_ring->count)
4010 i = 0;
4011 buffer_info = &rx_ring->buffer_info[i];
4012 }
4013
4014no_buffers:
4015 if (rx_ring->next_to_use != i) {
4016 rx_ring->next_to_use = i;
4017 if (i == 0)
4018 i = (rx_ring->count - 1);
4019 else
4020 i--;
4021
4022 /* Force memory writes to complete before letting h/w
4023 * know there are new descriptors to fetch. (Only
4024 * applicable for weak-ordered memory model archs,
4025 * such as IA-64). */
4026 wmb();
4027 writel(i, adapter->hw.hw_addr + rx_ring->tail);
4028 }
4029}
4030
4031/**
4032 * igb_mii_ioctl -
4033 * @netdev:
4034 * @ifreq:
4035 * @cmd:
4036 **/
4037static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4038{
4039 struct igb_adapter *adapter = netdev_priv(netdev);
4040 struct mii_ioctl_data *data = if_mii(ifr);
4041
4042 if (adapter->hw.phy.media_type != e1000_media_type_copper)
4043 return -EOPNOTSUPP;
4044
4045 switch (cmd) {
4046 case SIOCGMIIPHY:
4047 data->phy_id = adapter->hw.phy.addr;
4048 break;
4049 case SIOCGMIIREG:
4050 if (!capable(CAP_NET_ADMIN))
4051 return -EPERM;
Alexander Duyckf5f4cf02008-11-21 21:30:24 -08004052 if (igb_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4053 &data->val_out))
Auke Kok9d5c8242008-01-24 02:22:38 -08004054 return -EIO;
4055 break;
4056 case SIOCSMIIREG:
4057 default:
4058 return -EOPNOTSUPP;
4059 }
4060 return 0;
4061}
4062
4063/**
4064 * igb_ioctl -
4065 * @netdev:
4066 * @ifreq:
4067 * @cmd:
4068 **/
4069static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4070{
4071 switch (cmd) {
4072 case SIOCGMIIPHY:
4073 case SIOCGMIIREG:
4074 case SIOCSMIIREG:
4075 return igb_mii_ioctl(netdev, ifr, cmd);
4076 default:
4077 return -EOPNOTSUPP;
4078 }
4079}
4080
4081static void igb_vlan_rx_register(struct net_device *netdev,
4082 struct vlan_group *grp)
4083{
4084 struct igb_adapter *adapter = netdev_priv(netdev);
4085 struct e1000_hw *hw = &adapter->hw;
4086 u32 ctrl, rctl;
4087
4088 igb_irq_disable(adapter);
4089 adapter->vlgrp = grp;
4090
4091 if (grp) {
4092 /* enable VLAN tag insert/strip */
4093 ctrl = rd32(E1000_CTRL);
4094 ctrl |= E1000_CTRL_VME;
4095 wr32(E1000_CTRL, ctrl);
4096
4097 /* enable VLAN receive filtering */
4098 rctl = rd32(E1000_RCTL);
Auke Kok9d5c8242008-01-24 02:22:38 -08004099 rctl &= ~E1000_RCTL_CFIEN;
4100 wr32(E1000_RCTL, rctl);
4101 igb_update_mng_vlan(adapter);
4102 wr32(E1000_RLPML,
4103 adapter->max_frame_size + VLAN_TAG_SIZE);
4104 } else {
4105 /* disable VLAN tag insert/strip */
4106 ctrl = rd32(E1000_CTRL);
4107 ctrl &= ~E1000_CTRL_VME;
4108 wr32(E1000_CTRL, ctrl);
4109
Auke Kok9d5c8242008-01-24 02:22:38 -08004110 if (adapter->mng_vlan_id != (u16)IGB_MNG_VLAN_NONE) {
4111 igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4112 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
4113 }
4114 wr32(E1000_RLPML,
4115 adapter->max_frame_size);
4116 }
4117
4118 if (!test_bit(__IGB_DOWN, &adapter->state))
4119 igb_irq_enable(adapter);
4120}
4121
4122static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4123{
4124 struct igb_adapter *adapter = netdev_priv(netdev);
4125 struct e1000_hw *hw = &adapter->hw;
4126 u32 vfta, index;
4127
4128 if ((adapter->hw.mng_cookie.status &
4129 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
4130 (vid == adapter->mng_vlan_id))
4131 return;
4132 /* add VID to filter table */
4133 index = (vid >> 5) & 0x7F;
4134 vfta = array_rd32(E1000_VFTA, index);
4135 vfta |= (1 << (vid & 0x1F));
4136 igb_write_vfta(&adapter->hw, index, vfta);
4137}
4138
4139static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4140{
4141 struct igb_adapter *adapter = netdev_priv(netdev);
4142 struct e1000_hw *hw = &adapter->hw;
4143 u32 vfta, index;
4144
4145 igb_irq_disable(adapter);
4146 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4147
4148 if (!test_bit(__IGB_DOWN, &adapter->state))
4149 igb_irq_enable(adapter);
4150
4151 if ((adapter->hw.mng_cookie.status &
4152 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
4153 (vid == adapter->mng_vlan_id)) {
4154 /* release control to f/w */
4155 igb_release_hw_control(adapter);
4156 return;
4157 }
4158
4159 /* remove VID from filter table */
4160 index = (vid >> 5) & 0x7F;
4161 vfta = array_rd32(E1000_VFTA, index);
4162 vfta &= ~(1 << (vid & 0x1F));
4163 igb_write_vfta(&adapter->hw, index, vfta);
4164}
4165
4166static void igb_restore_vlan(struct igb_adapter *adapter)
4167{
4168 igb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4169
4170 if (adapter->vlgrp) {
4171 u16 vid;
4172 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4173 if (!vlan_group_get_device(adapter->vlgrp, vid))
4174 continue;
4175 igb_vlan_rx_add_vid(adapter->netdev, vid);
4176 }
4177 }
4178}
4179
4180int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx)
4181{
4182 struct e1000_mac_info *mac = &adapter->hw.mac;
4183
4184 mac->autoneg = 0;
4185
4186 /* Fiber NICs only allow 1000 gbps Full duplex */
4187 if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&
4188 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4189 dev_err(&adapter->pdev->dev,
4190 "Unsupported Speed/Duplex configuration\n");
4191 return -EINVAL;
4192 }
4193
4194 switch (spddplx) {
4195 case SPEED_10 + DUPLEX_HALF:
4196 mac->forced_speed_duplex = ADVERTISE_10_HALF;
4197 break;
4198 case SPEED_10 + DUPLEX_FULL:
4199 mac->forced_speed_duplex = ADVERTISE_10_FULL;
4200 break;
4201 case SPEED_100 + DUPLEX_HALF:
4202 mac->forced_speed_duplex = ADVERTISE_100_HALF;
4203 break;
4204 case SPEED_100 + DUPLEX_FULL:
4205 mac->forced_speed_duplex = ADVERTISE_100_FULL;
4206 break;
4207 case SPEED_1000 + DUPLEX_FULL:
4208 mac->autoneg = 1;
4209 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
4210 break;
4211 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4212 default:
4213 dev_err(&adapter->pdev->dev,
4214 "Unsupported Speed/Duplex configuration\n");
4215 return -EINVAL;
4216 }
4217 return 0;
4218}
4219
4220
4221static int igb_suspend(struct pci_dev *pdev, pm_message_t state)
4222{
4223 struct net_device *netdev = pci_get_drvdata(pdev);
4224 struct igb_adapter *adapter = netdev_priv(netdev);
4225 struct e1000_hw *hw = &adapter->hw;
Alexander Duyck2d064c02008-07-08 15:10:12 -07004226 u32 ctrl, rctl, status;
Auke Kok9d5c8242008-01-24 02:22:38 -08004227 u32 wufc = adapter->wol;
4228#ifdef CONFIG_PM
4229 int retval = 0;
4230#endif
4231
4232 netif_device_detach(netdev);
4233
Alexander Duycka88f10e2008-07-08 15:13:38 -07004234 if (netif_running(netdev))
4235 igb_close(netdev);
4236
4237 igb_reset_interrupt_capability(adapter);
4238
4239 igb_free_queues(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -08004240
4241#ifdef CONFIG_PM
4242 retval = pci_save_state(pdev);
4243 if (retval)
4244 return retval;
4245#endif
4246
4247 status = rd32(E1000_STATUS);
4248 if (status & E1000_STATUS_LU)
4249 wufc &= ~E1000_WUFC_LNKC;
4250
4251 if (wufc) {
4252 igb_setup_rctl(adapter);
4253 igb_set_multi(netdev);
4254
4255 /* turn on all-multi mode if wake on multicast is enabled */
4256 if (wufc & E1000_WUFC_MC) {
4257 rctl = rd32(E1000_RCTL);
4258 rctl |= E1000_RCTL_MPE;
4259 wr32(E1000_RCTL, rctl);
4260 }
4261
4262 ctrl = rd32(E1000_CTRL);
4263 /* advertise wake from D3Cold */
4264 #define E1000_CTRL_ADVD3WUC 0x00100000
4265 /* phy power management enable */
4266 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4267 ctrl |= E1000_CTRL_ADVD3WUC;
4268 wr32(E1000_CTRL, ctrl);
4269
Auke Kok9d5c8242008-01-24 02:22:38 -08004270 /* Allow time for pending master requests to run */
4271 igb_disable_pcie_master(&adapter->hw);
4272
4273 wr32(E1000_WUC, E1000_WUC_PME_EN);
4274 wr32(E1000_WUFC, wufc);
Auke Kok9d5c8242008-01-24 02:22:38 -08004275 } else {
4276 wr32(E1000_WUC, 0);
4277 wr32(E1000_WUFC, 0);
Auke Kok9d5c8242008-01-24 02:22:38 -08004278 }
4279
Alexander Duyck2d064c02008-07-08 15:10:12 -07004280 /* make sure adapter isn't asleep if manageability/wol is enabled */
4281 if (wufc || adapter->en_mng_pt) {
Auke Kok9d5c8242008-01-24 02:22:38 -08004282 pci_enable_wake(pdev, PCI_D3hot, 1);
4283 pci_enable_wake(pdev, PCI_D3cold, 1);
Alexander Duyck2d064c02008-07-08 15:10:12 -07004284 } else {
4285 igb_shutdown_fiber_serdes_link_82575(hw);
4286 pci_enable_wake(pdev, PCI_D3hot, 0);
4287 pci_enable_wake(pdev, PCI_D3cold, 0);
Auke Kok9d5c8242008-01-24 02:22:38 -08004288 }
4289
4290 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4291 * would have already happened in close and is redundant. */
4292 igb_release_hw_control(adapter);
4293
4294 pci_disable_device(pdev);
4295
4296 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4297
4298 return 0;
4299}
4300
4301#ifdef CONFIG_PM
4302static int igb_resume(struct pci_dev *pdev)
4303{
4304 struct net_device *netdev = pci_get_drvdata(pdev);
4305 struct igb_adapter *adapter = netdev_priv(netdev);
4306 struct e1000_hw *hw = &adapter->hw;
4307 u32 err;
4308
4309 pci_set_power_state(pdev, PCI_D0);
4310 pci_restore_state(pdev);
Taku Izumi42bfd33a2008-06-20 12:10:30 +09004311
Alexander Duyckaed5dec2009-02-06 23:16:04 +00004312 err = pci_enable_device_mem(pdev);
Auke Kok9d5c8242008-01-24 02:22:38 -08004313 if (err) {
4314 dev_err(&pdev->dev,
4315 "igb: Cannot enable PCI device from suspend\n");
4316 return err;
4317 }
4318 pci_set_master(pdev);
4319
4320 pci_enable_wake(pdev, PCI_D3hot, 0);
4321 pci_enable_wake(pdev, PCI_D3cold, 0);
4322
Alexander Duycka88f10e2008-07-08 15:13:38 -07004323 igb_set_interrupt_capability(adapter);
4324
4325 if (igb_alloc_queues(adapter)) {
4326 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
4327 return -ENOMEM;
Auke Kok9d5c8242008-01-24 02:22:38 -08004328 }
4329
4330 /* e1000_power_up_phy(adapter); */
4331
4332 igb_reset(adapter);
4333 wr32(E1000_WUS, ~0);
4334
Alexander Duycka88f10e2008-07-08 15:13:38 -07004335 if (netif_running(netdev)) {
4336 err = igb_open(netdev);
4337 if (err)
4338 return err;
4339 }
Auke Kok9d5c8242008-01-24 02:22:38 -08004340
4341 netif_device_attach(netdev);
4342
4343 /* let the f/w know that the h/w is now under the control of the
4344 * driver. */
4345 igb_get_hw_control(adapter);
4346
4347 return 0;
4348}
4349#endif
4350
4351static void igb_shutdown(struct pci_dev *pdev)
4352{
4353 igb_suspend(pdev, PMSG_SUSPEND);
4354}
4355
4356#ifdef CONFIG_NET_POLL_CONTROLLER
4357/*
4358 * Polling 'interrupt' - used by things like netconsole to send skbs
4359 * without having to re-enable interrupts. It's not called while
4360 * the interrupt routine is executing.
4361 */
4362static void igb_netpoll(struct net_device *netdev)
4363{
4364 struct igb_adapter *adapter = netdev_priv(netdev);
4365 int i;
4366 int work_done = 0;
4367
4368 igb_irq_disable(adapter);
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07004369 adapter->flags |= IGB_FLAG_IN_NETPOLL;
4370
Auke Kok9d5c8242008-01-24 02:22:38 -08004371 for (i = 0; i < adapter->num_tx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07004372 igb_clean_tx_irq(&adapter->tx_ring[i]);
Auke Kok9d5c8242008-01-24 02:22:38 -08004373
4374 for (i = 0; i < adapter->num_rx_queues; i++)
Mitch Williams3b644cf2008-06-27 10:59:48 -07004375 igb_clean_rx_irq_adv(&adapter->rx_ring[i],
Auke Kok9d5c8242008-01-24 02:22:38 -08004376 &work_done,
4377 adapter->rx_ring[i].napi.weight);
4378
Alexander Duyck7dfc16f2008-07-08 15:10:46 -07004379 adapter->flags &= ~IGB_FLAG_IN_NETPOLL;
Auke Kok9d5c8242008-01-24 02:22:38 -08004380 igb_irq_enable(adapter);
4381}
4382#endif /* CONFIG_NET_POLL_CONTROLLER */
4383
4384/**
4385 * igb_io_error_detected - called when PCI error is detected
4386 * @pdev: Pointer to PCI device
4387 * @state: The current pci connection state
4388 *
4389 * This function is called after a PCI bus error affecting
4390 * this device has been detected.
4391 */
4392static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
4393 pci_channel_state_t state)
4394{
4395 struct net_device *netdev = pci_get_drvdata(pdev);
4396 struct igb_adapter *adapter = netdev_priv(netdev);
4397
4398 netif_device_detach(netdev);
4399
4400 if (netif_running(netdev))
4401 igb_down(adapter);
4402 pci_disable_device(pdev);
4403
4404 /* Request a slot slot reset. */
4405 return PCI_ERS_RESULT_NEED_RESET;
4406}
4407
4408/**
4409 * igb_io_slot_reset - called after the pci bus has been reset.
4410 * @pdev: Pointer to PCI device
4411 *
4412 * Restart the card from scratch, as if from a cold-boot. Implementation
4413 * resembles the first-half of the igb_resume routine.
4414 */
4415static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
4416{
4417 struct net_device *netdev = pci_get_drvdata(pdev);
4418 struct igb_adapter *adapter = netdev_priv(netdev);
4419 struct e1000_hw *hw = &adapter->hw;
Alexander Duyck40a914f2008-11-27 00:24:37 -08004420 pci_ers_result_t result;
Taku Izumi42bfd33a2008-06-20 12:10:30 +09004421 int err;
Auke Kok9d5c8242008-01-24 02:22:38 -08004422
Alexander Duyckaed5dec2009-02-06 23:16:04 +00004423 if (pci_enable_device_mem(pdev)) {
Auke Kok9d5c8242008-01-24 02:22:38 -08004424 dev_err(&pdev->dev,
4425 "Cannot re-enable PCI device after reset.\n");
Alexander Duyck40a914f2008-11-27 00:24:37 -08004426 result = PCI_ERS_RESULT_DISCONNECT;
4427 } else {
4428 pci_set_master(pdev);
4429 pci_restore_state(pdev);
4430
4431 pci_enable_wake(pdev, PCI_D3hot, 0);
4432 pci_enable_wake(pdev, PCI_D3cold, 0);
4433
4434 igb_reset(adapter);
4435 wr32(E1000_WUS, ~0);
4436 result = PCI_ERS_RESULT_RECOVERED;
Auke Kok9d5c8242008-01-24 02:22:38 -08004437 }
Auke Kok9d5c8242008-01-24 02:22:38 -08004438
Jeff Kirsherea943d42008-12-11 20:34:19 -08004439 err = pci_cleanup_aer_uncorrect_error_status(pdev);
4440 if (err) {
4441 dev_err(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status "
4442 "failed 0x%0x\n", err);
4443 /* non-fatal, continue */
4444 }
Auke Kok9d5c8242008-01-24 02:22:38 -08004445
Alexander Duyck40a914f2008-11-27 00:24:37 -08004446 return result;
Auke Kok9d5c8242008-01-24 02:22:38 -08004447}
4448
4449/**
4450 * igb_io_resume - called when traffic can start flowing again.
4451 * @pdev: Pointer to PCI device
4452 *
4453 * This callback is called when the error recovery driver tells us that
4454 * its OK to resume normal operation. Implementation resembles the
4455 * second-half of the igb_resume routine.
4456 */
4457static void igb_io_resume(struct pci_dev *pdev)
4458{
4459 struct net_device *netdev = pci_get_drvdata(pdev);
4460 struct igb_adapter *adapter = netdev_priv(netdev);
4461
Auke Kok9d5c8242008-01-24 02:22:38 -08004462 if (netif_running(netdev)) {
4463 if (igb_up(adapter)) {
4464 dev_err(&pdev->dev, "igb_up failed after reset\n");
4465 return;
4466 }
4467 }
4468
4469 netif_device_attach(netdev);
4470
4471 /* let the f/w know that the h/w is now under the control of the
4472 * driver. */
4473 igb_get_hw_control(adapter);
Auke Kok9d5c8242008-01-24 02:22:38 -08004474}
4475
4476/* igb_main.c */