Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /******************************************************************************* |
2 | ||
0abb6eb1 | 3 | Intel PRO/10GbE Linux driver |
f731a9ef | 4 | Copyright(c) 1999 - 2008 Intel Corporation. |
0abb6eb1 AK |
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 | |
1da177e4 | 13 | more details. |
0abb6eb1 | 14 | |
1da177e4 | 15 | You should have received a copy of the GNU General Public License along with |
0abb6eb1 AK |
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 | ||
1da177e4 LT |
22 | Contact Information: |
23 | Linux NICS <linux.nics@intel.com> | |
0abb6eb1 | 24 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
1da177e4 LT |
25 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
26 | ||
27 | *******************************************************************************/ | |
28 | ||
29 | #include "ixgb.h" | |
30 | ||
1da177e4 | 31 | char ixgb_driver_name[] = "ixgb"; |
e9ab1d14 | 32 | static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; |
1da177e4 | 33 | |
1da177e4 | 34 | #define DRIVERNAPI "-NAPI" |
f731a9ef | 35 | #define DRV_VERSION "1.0.135-k2" DRIVERNAPI |
273dc74e | 36 | const char ixgb_driver_version[] = DRV_VERSION; |
f731a9ef | 37 | static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; |
1da177e4 | 38 | |
d9fed18b JB |
39 | #define IXGB_CB_LENGTH 256 |
40 | static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; | |
41 | module_param(copybreak, uint, 0644); | |
42 | MODULE_PARM_DESC(copybreak, | |
43 | "Maximum size of packet that is copied to a new buffer on receive"); | |
44 | ||
1da177e4 LT |
45 | /* ixgb_pci_tbl - PCI Device ID Table |
46 | * | |
47 | * Wildcard entries (PCI_ANY_ID) should come last | |
48 | * Last entry must be all 0s | |
49 | * | |
50 | * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, | |
51 | * Class, Class Mask, private data (not used) } | |
52 | */ | |
53 | static struct pci_device_id ixgb_pci_tbl[] = { | |
54 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, | |
55 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
940829e2 AK |
56 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4, |
57 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
1da177e4 LT |
58 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, |
59 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
7490d71a | 60 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, |
1da177e4 LT |
61 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
62 | ||
63 | /* required last entry */ | |
64 | {0,} | |
65 | }; | |
66 | ||
67 | MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); | |
68 | ||
69 | /* Local Function Prototypes */ | |
1da177e4 LT |
70 | static int ixgb_init_module(void); |
71 | static void ixgb_exit_module(void); | |
72 | static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); | |
73 | static void __devexit ixgb_remove(struct pci_dev *pdev); | |
74 | static int ixgb_sw_init(struct ixgb_adapter *adapter); | |
75 | static int ixgb_open(struct net_device *netdev); | |
76 | static int ixgb_close(struct net_device *netdev); | |
77 | static void ixgb_configure_tx(struct ixgb_adapter *adapter); | |
78 | static void ixgb_configure_rx(struct ixgb_adapter *adapter); | |
79 | static void ixgb_setup_rctl(struct ixgb_adapter *adapter); | |
80 | static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); | |
81 | static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); | |
82 | static void ixgb_set_multi(struct net_device *netdev); | |
83 | static void ixgb_watchdog(unsigned long data); | |
84 | static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev); | |
85 | static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); | |
86 | static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); | |
87 | static int ixgb_set_mac(struct net_device *netdev, void *p); | |
7d12e780 | 88 | static irqreturn_t ixgb_intr(int irq, void *data); |
446490ca | 89 | static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); |
ac79c82e | 90 | |
7490d71a JB |
91 | static int ixgb_clean(struct napi_struct *, int); |
92 | static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); | |
fc2d14e3 | 93 | static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); |
7490d71a | 94 | |
1da177e4 | 95 | static void ixgb_tx_timeout(struct net_device *dev); |
c4028958 | 96 | static void ixgb_tx_timeout_task(struct work_struct *work); |
7490d71a | 97 | |
1da177e4 | 98 | static void ixgb_vlan_rx_register(struct net_device *netdev, |
7490d71a | 99 | struct vlan_group *grp); |
222441a6 JP |
100 | static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
101 | static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); | |
1da177e4 LT |
102 | static void ixgb_restore_vlan(struct ixgb_adapter *adapter); |
103 | ||
1da177e4 LT |
104 | #ifdef CONFIG_NET_POLL_CONTROLLER |
105 | /* for netdump / net console */ | |
106 | static void ixgb_netpoll(struct net_device *dev); | |
107 | #endif | |
108 | ||
01748fbb | 109 | static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, |
7490d71a | 110 | enum pci_channel_state state); |
01748fbb LV |
111 | static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); |
112 | static void ixgb_io_resume (struct pci_dev *pdev); | |
1da177e4 | 113 | |
01748fbb LV |
114 | static struct pci_error_handlers ixgb_err_handler = { |
115 | .error_detected = ixgb_io_error_detected, | |
116 | .slot_reset = ixgb_io_slot_reset, | |
117 | .resume = ixgb_io_resume, | |
118 | }; | |
119 | ||
1da177e4 | 120 | static struct pci_driver ixgb_driver = { |
c2eba932 | 121 | .name = ixgb_driver_name, |
1da177e4 | 122 | .id_table = ixgb_pci_tbl, |
c2eba932 MC |
123 | .probe = ixgb_probe, |
124 | .remove = __devexit_p(ixgb_remove), | |
01748fbb | 125 | .err_handler = &ixgb_err_handler |
1da177e4 LT |
126 | }; |
127 | ||
128 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); | |
129 | MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); | |
130 | MODULE_LICENSE("GPL"); | |
01e5abc2 | 131 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 132 | |
ec9c3f5d AK |
133 | #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
134 | static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; | |
135 | module_param(debug, int, 0); | |
136 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
137 | ||
1da177e4 LT |
138 | /** |
139 | * ixgb_init_module - Driver Registration Routine | |
140 | * | |
141 | * ixgb_init_module is the first routine called when the driver is | |
142 | * loaded. All it does is register with the PCI subsystem. | |
143 | **/ | |
144 | ||
145 | static int __init | |
146 | ixgb_init_module(void) | |
147 | { | |
1da177e4 LT |
148 | printk(KERN_INFO "%s - version %s\n", |
149 | ixgb_driver_string, ixgb_driver_version); | |
150 | ||
151 | printk(KERN_INFO "%s\n", ixgb_copyright); | |
152 | ||
29917620 | 153 | return pci_register_driver(&ixgb_driver); |
1da177e4 LT |
154 | } |
155 | ||
156 | module_init(ixgb_init_module); | |
157 | ||
158 | /** | |
159 | * ixgb_exit_module - Driver Exit Cleanup Routine | |
160 | * | |
161 | * ixgb_exit_module is called just before the driver is removed | |
162 | * from memory. | |
163 | **/ | |
164 | ||
165 | static void __exit | |
166 | ixgb_exit_module(void) | |
167 | { | |
1da177e4 LT |
168 | pci_unregister_driver(&ixgb_driver); |
169 | } | |
170 | ||
171 | module_exit(ixgb_exit_module); | |
172 | ||
173 | /** | |
174 | * ixgb_irq_disable - Mask off interrupt generation on the NIC | |
175 | * @adapter: board private structure | |
176 | **/ | |
177 | ||
235949d1 | 178 | static void |
1da177e4 LT |
179 | ixgb_irq_disable(struct ixgb_adapter *adapter) |
180 | { | |
1da177e4 LT |
181 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
182 | IXGB_WRITE_FLUSH(&adapter->hw); | |
183 | synchronize_irq(adapter->pdev->irq); | |
184 | } | |
185 | ||
186 | /** | |
187 | * ixgb_irq_enable - Enable default interrupt generation settings | |
188 | * @adapter: board private structure | |
189 | **/ | |
190 | ||
235949d1 | 191 | static void |
1da177e4 LT |
192 | ixgb_irq_enable(struct ixgb_adapter *adapter) |
193 | { | |
9c61a9dc JB |
194 | u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | |
195 | IXGB_INT_TXDW | IXGB_INT_LSC; | |
196 | if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID) | |
197 | val |= IXGB_INT_GPI0; | |
198 | IXGB_WRITE_REG(&adapter->hw, IMS, val); | |
199 | IXGB_WRITE_FLUSH(&adapter->hw); | |
1da177e4 LT |
200 | } |
201 | ||
202 | int | |
203 | ixgb_up(struct ixgb_adapter *adapter) | |
204 | { | |
205 | struct net_device *netdev = adapter->netdev; | |
fb136c07 | 206 | int err, irq_flags = IRQF_SHARED; |
1da177e4 LT |
207 | int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
208 | struct ixgb_hw *hw = &adapter->hw; | |
209 | ||
210 | /* hardware has been reset, we need to reload some things */ | |
211 | ||
8556f0d1 | 212 | ixgb_rar_set(hw, netdev->dev_addr, 0); |
1da177e4 LT |
213 | ixgb_set_multi(netdev); |
214 | ||
215 | ixgb_restore_vlan(adapter); | |
216 | ||
217 | ixgb_configure_tx(adapter); | |
218 | ixgb_setup_rctl(adapter); | |
219 | ixgb_configure_rx(adapter); | |
fc2d14e3 | 220 | ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); |
1da177e4 | 221 | |
e59d1696 AK |
222 | /* disable interrupts and get the hardware into a known state */ |
223 | IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); | |
224 | ||
fb136c07 AK |
225 | /* only enable MSI if bus is in PCI-X mode */ |
226 | if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { | |
227 | err = pci_enable_msi(adapter->pdev); | |
228 | if (!err) { | |
229 | adapter->have_msi = 1; | |
230 | irq_flags = 0; | |
231 | } | |
1da177e4 LT |
232 | /* proceed to try to request regular interrupt */ |
233 | } | |
1da177e4 | 234 | |
fb136c07 AK |
235 | err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags, |
236 | netdev->name, netdev); | |
237 | if (err) { | |
238 | if (adapter->have_msi) | |
239 | pci_disable_msi(adapter->pdev); | |
ec9c3f5d AK |
240 | DPRINTK(PROBE, ERR, |
241 | "Unable to allocate interrupt Error: %d\n", err); | |
1da177e4 | 242 | return err; |
ec9c3f5d | 243 | } |
1da177e4 | 244 | |
03f83041 | 245 | if ((hw->max_frame_size != max_frame) || |
1da177e4 LT |
246 | (hw->max_frame_size != |
247 | (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { | |
248 | ||
249 | hw->max_frame_size = max_frame; | |
250 | ||
251 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
252 | ||
03f83041 | 253 | if (hw->max_frame_size > |
1da177e4 | 254 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
222441a6 | 255 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
1da177e4 | 256 | |
03f83041 | 257 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
1da177e4 LT |
258 | ctrl0 |= IXGB_CTRL0_JFE; |
259 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
260 | } | |
261 | } | |
262 | } | |
263 | ||
bab2bce7 | 264 | clear_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 | 265 | |
bea3348e | 266 | napi_enable(&adapter->napi); |
e59d1696 AK |
267 | ixgb_irq_enable(adapter); |
268 | ||
bab2bce7 JB |
269 | mod_timer(&adapter->watchdog_timer, jiffies); |
270 | ||
1da177e4 LT |
271 | return 0; |
272 | } | |
273 | ||
274 | void | |
446490ca | 275 | ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) |
1da177e4 LT |
276 | { |
277 | struct net_device *netdev = adapter->netdev; | |
278 | ||
bab2bce7 JB |
279 | /* prevent the interrupt handler from restarting watchdog */ |
280 | set_bit(__IXGB_DOWN, &adapter->flags); | |
281 | ||
49d85c50 | 282 | napi_disable(&adapter->napi); |
bab2bce7 | 283 | /* waiting for NAPI to complete can re-enable interrupts */ |
1da177e4 LT |
284 | ixgb_irq_disable(adapter); |
285 | free_irq(adapter->pdev->irq, netdev); | |
fb136c07 AK |
286 | |
287 | if (adapter->have_msi) | |
1da177e4 LT |
288 | pci_disable_msi(adapter->pdev); |
289 | ||
03f83041 | 290 | if (kill_watchdog) |
1da177e4 | 291 | del_timer_sync(&adapter->watchdog_timer); |
49d85c50 | 292 | |
1da177e4 LT |
293 | adapter->link_speed = 0; |
294 | adapter->link_duplex = 0; | |
295 | netif_carrier_off(netdev); | |
296 | netif_stop_queue(netdev); | |
297 | ||
298 | ixgb_reset(adapter); | |
299 | ixgb_clean_tx_ring(adapter); | |
300 | ixgb_clean_rx_ring(adapter); | |
301 | } | |
302 | ||
303 | void | |
304 | ixgb_reset(struct ixgb_adapter *adapter) | |
305 | { | |
3fd7131f | 306 | struct ixgb_hw *hw = &adapter->hw; |
1da177e4 | 307 | |
3fd7131f MW |
308 | ixgb_adapter_stop(hw); |
309 | if (!ixgb_init_hw(hw)) | |
ec9c3f5d | 310 | DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n"); |
3fd7131f MW |
311 | |
312 | /* restore frame size information */ | |
313 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
314 | if (hw->max_frame_size > | |
315 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { | |
316 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); | |
317 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { | |
318 | ctrl0 |= IXGB_CTRL0_JFE; | |
319 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
320 | } | |
321 | } | |
1da177e4 LT |
322 | } |
323 | ||
0edc3527 SH |
324 | static const struct net_device_ops ixgb_netdev_ops = { |
325 | .ndo_open = ixgb_open, | |
326 | .ndo_stop = ixgb_close, | |
00829823 | 327 | .ndo_start_xmit = ixgb_xmit_frame, |
0edc3527 SH |
328 | .ndo_get_stats = ixgb_get_stats, |
329 | .ndo_set_multicast_list = ixgb_set_multi, | |
330 | .ndo_validate_addr = eth_validate_addr, | |
331 | .ndo_set_mac_address = ixgb_set_mac, | |
332 | .ndo_change_mtu = ixgb_change_mtu, | |
333 | .ndo_tx_timeout = ixgb_tx_timeout, | |
334 | .ndo_vlan_rx_register = ixgb_vlan_rx_register, | |
335 | .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, | |
336 | .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, | |
337 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
338 | .ndo_poll_controller = ixgb_netpoll, | |
339 | #endif | |
340 | }; | |
341 | ||
1da177e4 LT |
342 | /** |
343 | * ixgb_probe - Device Initialization Routine | |
344 | * @pdev: PCI device information struct | |
345 | * @ent: entry in ixgb_pci_tbl | |
346 | * | |
347 | * Returns 0 on success, negative on failure | |
348 | * | |
349 | * ixgb_probe initializes an adapter identified by a pci_dev structure. | |
350 | * The OS initialization, configuring of the adapter private structure, | |
351 | * and a hardware reset occur. | |
352 | **/ | |
353 | ||
354 | static int __devinit | |
0060c072 | 355 | ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
356 | { |
357 | struct net_device *netdev = NULL; | |
358 | struct ixgb_adapter *adapter; | |
359 | static int cards_found = 0; | |
1da177e4 LT |
360 | int pci_using_dac; |
361 | int i; | |
362 | int err; | |
363 | ||
9e7bd330 JB |
364 | err = pci_enable_device(pdev); |
365 | if (err) | |
1da177e4 LT |
366 | return err; |
367 | ||
6a35528a YH |
368 | if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) && |
369 | !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) { | |
1da177e4 LT |
370 | pci_using_dac = 1; |
371 | } else { | |
284901a9 YH |
372 | if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) || |
373 | (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) { | |
ec9c3f5d AK |
374 | printk(KERN_ERR |
375 | "ixgb: No usable DMA configuration, aborting\n"); | |
c91e468a | 376 | goto err_dma_mask; |
1da177e4 LT |
377 | } |
378 | pci_using_dac = 0; | |
379 | } | |
380 | ||
9e7bd330 JB |
381 | err = pci_request_regions(pdev, ixgb_driver_name); |
382 | if (err) | |
c91e468a | 383 | goto err_request_regions; |
1da177e4 LT |
384 | |
385 | pci_set_master(pdev); | |
386 | ||
387 | netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); | |
03f83041 | 388 | if (!netdev) { |
1da177e4 LT |
389 | err = -ENOMEM; |
390 | goto err_alloc_etherdev; | |
391 | } | |
392 | ||
1da177e4 LT |
393 | SET_NETDEV_DEV(netdev, &pdev->dev); |
394 | ||
395 | pci_set_drvdata(pdev, netdev); | |
8908c6cd | 396 | adapter = netdev_priv(netdev); |
1da177e4 LT |
397 | adapter->netdev = netdev; |
398 | adapter->pdev = pdev; | |
399 | adapter->hw.back = adapter; | |
ec9c3f5d | 400 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); |
1da177e4 | 401 | |
275f165f | 402 | adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); |
e539e466 | 403 | if (!adapter->hw.hw_addr) { |
1da177e4 LT |
404 | err = -EIO; |
405 | goto err_ioremap; | |
406 | } | |
407 | ||
1459336d | 408 | for (i = BAR_1; i <= BAR_5; i++) { |
03f83041 | 409 | if (pci_resource_len(pdev, i) == 0) |
1da177e4 | 410 | continue; |
03f83041 | 411 | if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
1da177e4 LT |
412 | adapter->hw.io_base = pci_resource_start(pdev, i); |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
0edc3527 | 417 | netdev->netdev_ops = &ixgb_netdev_ops; |
1da177e4 | 418 | ixgb_set_ethtool_ops(netdev); |
9b8118df | 419 | netdev->watchdog_timeo = 5 * HZ; |
bea3348e | 420 | netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); |
1da177e4 | 421 | |
0eb5a34c | 422 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
1da177e4 LT |
423 | |
424 | adapter->bd_number = cards_found; | |
425 | adapter->link_speed = 0; | |
426 | adapter->link_duplex = 0; | |
427 | ||
428 | /* setup the private structure */ | |
429 | ||
9e7bd330 JB |
430 | err = ixgb_sw_init(adapter); |
431 | if (err) | |
1da177e4 LT |
432 | goto err_sw_init; |
433 | ||
434 | netdev->features = NETIF_F_SG | | |
435 | NETIF_F_HW_CSUM | | |
436 | NETIF_F_HW_VLAN_TX | | |
437 | NETIF_F_HW_VLAN_RX | | |
438 | NETIF_F_HW_VLAN_FILTER; | |
1da177e4 | 439 | netdev->features |= NETIF_F_TSO; |
1da177e4 | 440 | |
03f83041 | 441 | if (pci_using_dac) |
1da177e4 LT |
442 | netdev->features |= NETIF_F_HIGHDMA; |
443 | ||
444 | /* make sure the EEPROM is good */ | |
445 | ||
03f83041 | 446 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
ec9c3f5d | 447 | DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n"); |
1da177e4 LT |
448 | err = -EIO; |
449 | goto err_eeprom; | |
450 | } | |
451 | ||
452 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
df859c51 | 453 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
1da177e4 | 454 | |
03f83041 | 455 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
ec9c3f5d | 456 | DPRINTK(PROBE, ERR, "Invalid MAC Address\n"); |
1da177e4 LT |
457 | err = -EIO; |
458 | goto err_eeprom; | |
459 | } | |
460 | ||
461 | adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); | |
462 | ||
463 | init_timer(&adapter->watchdog_timer); | |
464 | adapter->watchdog_timer.function = &ixgb_watchdog; | |
465 | adapter->watchdog_timer.data = (unsigned long)adapter; | |
466 | ||
c4028958 | 467 | INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); |
1da177e4 | 468 | |
ec9c3f5d | 469 | strcpy(netdev->name, "eth%d"); |
9e7bd330 JB |
470 | err = register_netdev(netdev); |
471 | if (err) | |
1da177e4 LT |
472 | goto err_register; |
473 | ||
3a6d1bc4 | 474 | /* carrier off reporting is important to ethtool even BEFORE open */ |
1da177e4 | 475 | netif_carrier_off(netdev); |
1da177e4 | 476 | |
ec9c3f5d | 477 | DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n"); |
1da177e4 LT |
478 | ixgb_check_options(adapter); |
479 | /* reset the hardware with the new settings */ | |
480 | ||
481 | ixgb_reset(adapter); | |
482 | ||
483 | cards_found++; | |
484 | return 0; | |
485 | ||
486 | err_register: | |
487 | err_sw_init: | |
488 | err_eeprom: | |
489 | iounmap(adapter->hw.hw_addr); | |
490 | err_ioremap: | |
491 | free_netdev(netdev); | |
492 | err_alloc_etherdev: | |
493 | pci_release_regions(pdev); | |
c91e468a AS |
494 | err_request_regions: |
495 | err_dma_mask: | |
496 | pci_disable_device(pdev); | |
1da177e4 LT |
497 | return err; |
498 | } | |
499 | ||
500 | /** | |
501 | * ixgb_remove - Device Removal Routine | |
502 | * @pdev: PCI device information struct | |
503 | * | |
504 | * ixgb_remove is called by the PCI subsystem to alert the driver | |
505 | * that it should release a PCI device. The could be caused by a | |
506 | * Hot-Plug event, or because the driver is going to be removed from | |
507 | * memory. | |
508 | **/ | |
509 | ||
510 | static void __devexit | |
511 | ixgb_remove(struct pci_dev *pdev) | |
512 | { | |
513 | struct net_device *netdev = pci_get_drvdata(pdev); | |
8908c6cd | 514 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 515 | |
12579697 JB |
516 | flush_scheduled_work(); |
517 | ||
1da177e4 LT |
518 | unregister_netdev(netdev); |
519 | ||
520 | iounmap(adapter->hw.hw_addr); | |
521 | pci_release_regions(pdev); | |
522 | ||
523 | free_netdev(netdev); | |
524 | } | |
525 | ||
526 | /** | |
527 | * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) | |
528 | * @adapter: board private structure to initialize | |
529 | * | |
530 | * ixgb_sw_init initializes the Adapter private data structure. | |
531 | * Fields are initialized based on PCI device information and | |
532 | * OS network device settings (MTU size). | |
533 | **/ | |
534 | ||
535 | static int __devinit | |
536 | ixgb_sw_init(struct ixgb_adapter *adapter) | |
537 | { | |
538 | struct ixgb_hw *hw = &adapter->hw; | |
539 | struct net_device *netdev = adapter->netdev; | |
540 | struct pci_dev *pdev = adapter->pdev; | |
541 | ||
542 | /* PCI config space info */ | |
543 | ||
544 | hw->vendor_id = pdev->vendor; | |
545 | hw->device_id = pdev->device; | |
546 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
547 | hw->subsystem_id = pdev->subsystem_device; | |
548 | ||
1da177e4 | 549 | hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
a3dc3da0 | 550 | adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ |
1da177e4 | 551 | |
03f83041 | 552 | if ((hw->device_id == IXGB_DEVICE_ID_82597EX) |
940829e2 AK |
553 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) |
554 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) | |
555 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) | |
0060c072 | 556 | hw->mac_type = ixgb_82597; |
1da177e4 LT |
557 | else { |
558 | /* should never have loaded on this device */ | |
ec9c3f5d | 559 | DPRINTK(PROBE, ERR, "unsupported device id\n"); |
1da177e4 LT |
560 | } |
561 | ||
562 | /* enable flow control to be programmed */ | |
563 | hw->fc.send_xon = 1; | |
564 | ||
bab2bce7 | 565 | set_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 LT |
566 | return 0; |
567 | } | |
568 | ||
569 | /** | |
570 | * ixgb_open - Called when a network interface is made active | |
571 | * @netdev: network interface device structure | |
572 | * | |
573 | * Returns 0 on success, negative value on failure | |
574 | * | |
575 | * The open entry point is called when a network interface is made | |
576 | * active by the system (IFF_UP). At this point all resources needed | |
577 | * for transmit and receive operations are allocated, the interrupt | |
578 | * handler is registered with the OS, the watchdog timer is started, | |
579 | * and the stack is notified that the interface is ready. | |
580 | **/ | |
581 | ||
582 | static int | |
583 | ixgb_open(struct net_device *netdev) | |
584 | { | |
8908c6cd | 585 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
586 | int err; |
587 | ||
588 | /* allocate transmit descriptors */ | |
9e7bd330 JB |
589 | err = ixgb_setup_tx_resources(adapter); |
590 | if (err) | |
1da177e4 LT |
591 | goto err_setup_tx; |
592 | ||
3a6d1bc4 JB |
593 | netif_carrier_off(netdev); |
594 | ||
1da177e4 LT |
595 | /* allocate receive descriptors */ |
596 | ||
9e7bd330 JB |
597 | err = ixgb_setup_rx_resources(adapter); |
598 | if (err) | |
1da177e4 LT |
599 | goto err_setup_rx; |
600 | ||
9e7bd330 JB |
601 | err = ixgb_up(adapter); |
602 | if (err) | |
1da177e4 LT |
603 | goto err_up; |
604 | ||
3a6d1bc4 JB |
605 | netif_start_queue(netdev); |
606 | ||
1da177e4 LT |
607 | return 0; |
608 | ||
609 | err_up: | |
610 | ixgb_free_rx_resources(adapter); | |
611 | err_setup_rx: | |
612 | ixgb_free_tx_resources(adapter); | |
613 | err_setup_tx: | |
614 | ixgb_reset(adapter); | |
615 | ||
616 | return err; | |
617 | } | |
618 | ||
619 | /** | |
620 | * ixgb_close - Disables a network interface | |
621 | * @netdev: network interface device structure | |
622 | * | |
623 | * Returns 0, this is not allowed to fail | |
624 | * | |
625 | * The close entry point is called when an interface is de-activated | |
626 | * by the OS. The hardware is still under the drivers control, but | |
627 | * needs to be disabled. A global MAC reset is issued to stop the | |
628 | * hardware, and all transmit and receive resources are freed. | |
629 | **/ | |
630 | ||
631 | static int | |
632 | ixgb_close(struct net_device *netdev) | |
633 | { | |
8908c6cd | 634 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 635 | |
446490ca | 636 | ixgb_down(adapter, true); |
1da177e4 LT |
637 | |
638 | ixgb_free_tx_resources(adapter); | |
639 | ixgb_free_rx_resources(adapter); | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | /** | |
645 | * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) | |
646 | * @adapter: board private structure | |
647 | * | |
648 | * Return 0 on success, negative on failure | |
649 | **/ | |
650 | ||
651 | int | |
652 | ixgb_setup_tx_resources(struct ixgb_adapter *adapter) | |
653 | { | |
654 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
655 | struct pci_dev *pdev = adapter->pdev; | |
656 | int size; | |
657 | ||
658 | size = sizeof(struct ixgb_buffer) * txdr->count; | |
659 | txdr->buffer_info = vmalloc(size); | |
03f83041 | 660 | if (!txdr->buffer_info) { |
ec9c3f5d AK |
661 | DPRINTK(PROBE, ERR, |
662 | "Unable to allocate transmit descriptor ring memory\n"); | |
1da177e4 LT |
663 | return -ENOMEM; |
664 | } | |
665 | memset(txdr->buffer_info, 0, size); | |
666 | ||
667 | /* round up to nearest 4K */ | |
668 | ||
669 | txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); | |
55e924cf | 670 | txdr->size = ALIGN(txdr->size, 4096); |
1da177e4 LT |
671 | |
672 | txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); | |
03f83041 | 673 | if (!txdr->desc) { |
1da177e4 | 674 | vfree(txdr->buffer_info); |
ec9c3f5d AK |
675 | DPRINTK(PROBE, ERR, |
676 | "Unable to allocate transmit descriptor memory\n"); | |
1da177e4 LT |
677 | return -ENOMEM; |
678 | } | |
679 | memset(txdr->desc, 0, txdr->size); | |
680 | ||
681 | txdr->next_to_use = 0; | |
682 | txdr->next_to_clean = 0; | |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
687 | /** | |
688 | * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. | |
689 | * @adapter: board private structure | |
690 | * | |
691 | * Configure the Tx unit of the MAC after a reset. | |
692 | **/ | |
693 | ||
694 | static void | |
695 | ixgb_configure_tx(struct ixgb_adapter *adapter) | |
696 | { | |
222441a6 JP |
697 | u64 tdba = adapter->tx_ring.dma; |
698 | u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); | |
699 | u32 tctl; | |
1da177e4 LT |
700 | struct ixgb_hw *hw = &adapter->hw; |
701 | ||
0060c072 JB |
702 | /* Setup the Base and Length of the Tx Descriptor Ring |
703 | * tx_ring.dma can be either a 32 or 64 bit value | |
1da177e4 LT |
704 | */ |
705 | ||
706 | IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); | |
707 | IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); | |
708 | ||
709 | IXGB_WRITE_REG(hw, TDLEN, tdlen); | |
710 | ||
711 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
712 | ||
713 | IXGB_WRITE_REG(hw, TDH, 0); | |
714 | IXGB_WRITE_REG(hw, TDT, 0); | |
715 | ||
716 | /* don't set up txdctl, it induces performance problems if configured | |
717 | * incorrectly */ | |
718 | /* Set the Tx Interrupt Delay register */ | |
719 | ||
720 | IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); | |
721 | ||
722 | /* Program the Transmit Control Register */ | |
723 | ||
724 | tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; | |
725 | IXGB_WRITE_REG(hw, TCTL, tctl); | |
726 | ||
727 | /* Setup Transmit Descriptor Settings for this adapter */ | |
728 | adapter->tx_cmd_type = | |
0060c072 JB |
729 | IXGB_TX_DESC_TYPE | |
730 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); | |
1da177e4 LT |
731 | } |
732 | ||
733 | /** | |
734 | * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) | |
735 | * @adapter: board private structure | |
736 | * | |
737 | * Returns 0 on success, negative on failure | |
738 | **/ | |
739 | ||
740 | int | |
741 | ixgb_setup_rx_resources(struct ixgb_adapter *adapter) | |
742 | { | |
743 | struct ixgb_desc_ring *rxdr = &adapter->rx_ring; | |
744 | struct pci_dev *pdev = adapter->pdev; | |
745 | int size; | |
746 | ||
747 | size = sizeof(struct ixgb_buffer) * rxdr->count; | |
748 | rxdr->buffer_info = vmalloc(size); | |
03f83041 | 749 | if (!rxdr->buffer_info) { |
ec9c3f5d AK |
750 | DPRINTK(PROBE, ERR, |
751 | "Unable to allocate receive descriptor ring\n"); | |
1da177e4 LT |
752 | return -ENOMEM; |
753 | } | |
754 | memset(rxdr->buffer_info, 0, size); | |
755 | ||
756 | /* Round up to nearest 4K */ | |
757 | ||
758 | rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); | |
55e924cf | 759 | rxdr->size = ALIGN(rxdr->size, 4096); |
1da177e4 LT |
760 | |
761 | rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); | |
762 | ||
03f83041 | 763 | if (!rxdr->desc) { |
1da177e4 | 764 | vfree(rxdr->buffer_info); |
ec9c3f5d AK |
765 | DPRINTK(PROBE, ERR, |
766 | "Unable to allocate receive descriptors\n"); | |
1da177e4 LT |
767 | return -ENOMEM; |
768 | } | |
769 | memset(rxdr->desc, 0, rxdr->size); | |
770 | ||
771 | rxdr->next_to_clean = 0; | |
772 | rxdr->next_to_use = 0; | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | /** | |
778 | * ixgb_setup_rctl - configure the receive control register | |
779 | * @adapter: Board private structure | |
780 | **/ | |
781 | ||
782 | static void | |
783 | ixgb_setup_rctl(struct ixgb_adapter *adapter) | |
784 | { | |
222441a6 | 785 | u32 rctl; |
1da177e4 LT |
786 | |
787 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
788 | ||
789 | rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); | |
790 | ||
791 | rctl |= | |
0060c072 JB |
792 | IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | |
793 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | | |
1da177e4 LT |
794 | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); |
795 | ||
796 | rctl |= IXGB_RCTL_SECRC; | |
797 | ||
3f3dc0dd | 798 | if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
1da177e4 | 799 | rctl |= IXGB_RCTL_BSIZE_2048; |
3f3dc0dd | 800 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
1da177e4 | 801 | rctl |= IXGB_RCTL_BSIZE_4096; |
3f3dc0dd | 802 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
1da177e4 | 803 | rctl |= IXGB_RCTL_BSIZE_8192; |
3f3dc0dd | 804 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
1da177e4 | 805 | rctl |= IXGB_RCTL_BSIZE_16384; |
1da177e4 LT |
806 | |
807 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
808 | } | |
809 | ||
810 | /** | |
811 | * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. | |
812 | * @adapter: board private structure | |
813 | * | |
814 | * Configure the Rx unit of the MAC after a reset. | |
815 | **/ | |
816 | ||
817 | static void | |
818 | ixgb_configure_rx(struct ixgb_adapter *adapter) | |
819 | { | |
222441a6 JP |
820 | u64 rdba = adapter->rx_ring.dma; |
821 | u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); | |
1da177e4 | 822 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 JP |
823 | u32 rctl; |
824 | u32 rxcsum; | |
1da177e4 LT |
825 | |
826 | /* make sure receives are disabled while setting up the descriptors */ | |
827 | ||
828 | rctl = IXGB_READ_REG(hw, RCTL); | |
829 | IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); | |
830 | ||
831 | /* set the Receive Delay Timer Register */ | |
832 | ||
833 | IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); | |
834 | ||
835 | /* Setup the Base and Length of the Rx Descriptor Ring */ | |
836 | ||
837 | IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); | |
838 | IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); | |
839 | ||
840 | IXGB_WRITE_REG(hw, RDLEN, rdlen); | |
841 | ||
842 | /* Setup the HW Rx Head and Tail Descriptor Pointers */ | |
843 | IXGB_WRITE_REG(hw, RDH, 0); | |
844 | IXGB_WRITE_REG(hw, RDT, 0); | |
845 | ||
4360386f JB |
846 | /* due to the hardware errata with RXDCTL, we are unable to use any of |
847 | * the performance enhancing features of it without causing other | |
848 | * subtle bugs, some of the bugs could include receive length | |
849 | * corruption at high data rates (WTHRESH > 0) and/or receive | |
850 | * descriptor ring irregularites (particularly in hardware cache) */ | |
851 | IXGB_WRITE_REG(hw, RXDCTL, 0); | |
1da177e4 LT |
852 | |
853 | /* Enable Receive Checksum Offload for TCP and UDP */ | |
446490ca | 854 | if (adapter->rx_csum) { |
1da177e4 LT |
855 | rxcsum = IXGB_READ_REG(hw, RXCSUM); |
856 | rxcsum |= IXGB_RXCSUM_TUOFL; | |
857 | IXGB_WRITE_REG(hw, RXCSUM, rxcsum); | |
858 | } | |
859 | ||
860 | /* Enable Receives */ | |
861 | ||
862 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
863 | } | |
864 | ||
865 | /** | |
866 | * ixgb_free_tx_resources - Free Tx Resources | |
867 | * @adapter: board private structure | |
868 | * | |
869 | * Free all transmit software resources | |
870 | **/ | |
871 | ||
872 | void | |
873 | ixgb_free_tx_resources(struct ixgb_adapter *adapter) | |
874 | { | |
875 | struct pci_dev *pdev = adapter->pdev; | |
876 | ||
877 | ixgb_clean_tx_ring(adapter); | |
878 | ||
879 | vfree(adapter->tx_ring.buffer_info); | |
880 | adapter->tx_ring.buffer_info = NULL; | |
881 | ||
882 | pci_free_consistent(pdev, adapter->tx_ring.size, | |
883 | adapter->tx_ring.desc, adapter->tx_ring.dma); | |
884 | ||
885 | adapter->tx_ring.desc = NULL; | |
886 | } | |
887 | ||
235949d1 | 888 | static void |
1da177e4 | 889 | ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, |
0060c072 | 890 | struct ixgb_buffer *buffer_info) |
1da177e4 | 891 | { |
1dfdd7df | 892 | buffer_info->dma = 0; |
fe52eeb8 AD |
893 | if (buffer_info->skb) { |
894 | skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb, | |
895 | DMA_TO_DEVICE); | |
896 | dev_kfree_skb_any(buffer_info->skb); | |
897 | buffer_info->skb = NULL; | |
898 | } | |
1dfdd7df AK |
899 | buffer_info->time_stamp = 0; |
900 | /* these fields must always be initialized in tx | |
901 | * buffer_info->length = 0; | |
902 | * buffer_info->next_to_watch = 0; */ | |
1da177e4 LT |
903 | } |
904 | ||
905 | /** | |
906 | * ixgb_clean_tx_ring - Free Tx Buffers | |
907 | * @adapter: board private structure | |
908 | **/ | |
909 | ||
910 | static void | |
911 | ixgb_clean_tx_ring(struct ixgb_adapter *adapter) | |
912 | { | |
913 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
914 | struct ixgb_buffer *buffer_info; | |
915 | unsigned long size; | |
916 | unsigned int i; | |
917 | ||
918 | /* Free all the Tx ring sk_buffs */ | |
919 | ||
1459336d | 920 | for (i = 0; i < tx_ring->count; i++) { |
1da177e4 LT |
921 | buffer_info = &tx_ring->buffer_info[i]; |
922 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
923 | } | |
924 | ||
925 | size = sizeof(struct ixgb_buffer) * tx_ring->count; | |
926 | memset(tx_ring->buffer_info, 0, size); | |
927 | ||
928 | /* Zero out the descriptor ring */ | |
929 | ||
930 | memset(tx_ring->desc, 0, tx_ring->size); | |
931 | ||
932 | tx_ring->next_to_use = 0; | |
933 | tx_ring->next_to_clean = 0; | |
934 | ||
935 | IXGB_WRITE_REG(&adapter->hw, TDH, 0); | |
936 | IXGB_WRITE_REG(&adapter->hw, TDT, 0); | |
937 | } | |
938 | ||
939 | /** | |
940 | * ixgb_free_rx_resources - Free Rx Resources | |
941 | * @adapter: board private structure | |
942 | * | |
943 | * Free all receive software resources | |
944 | **/ | |
945 | ||
946 | void | |
947 | ixgb_free_rx_resources(struct ixgb_adapter *adapter) | |
948 | { | |
949 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
950 | struct pci_dev *pdev = adapter->pdev; | |
951 | ||
952 | ixgb_clean_rx_ring(adapter); | |
953 | ||
954 | vfree(rx_ring->buffer_info); | |
955 | rx_ring->buffer_info = NULL; | |
956 | ||
957 | pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); | |
958 | ||
959 | rx_ring->desc = NULL; | |
960 | } | |
961 | ||
962 | /** | |
963 | * ixgb_clean_rx_ring - Free Rx Buffers | |
964 | * @adapter: board private structure | |
965 | **/ | |
966 | ||
967 | static void | |
968 | ixgb_clean_rx_ring(struct ixgb_adapter *adapter) | |
969 | { | |
970 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
971 | struct ixgb_buffer *buffer_info; | |
972 | struct pci_dev *pdev = adapter->pdev; | |
973 | unsigned long size; | |
974 | unsigned int i; | |
975 | ||
976 | /* Free all the Rx ring sk_buffs */ | |
977 | ||
1459336d | 978 | for (i = 0; i < rx_ring->count; i++) { |
1da177e4 | 979 | buffer_info = &rx_ring->buffer_info[i]; |
23e55a32 | 980 | if (buffer_info->dma) { |
1da177e4 LT |
981 | pci_unmap_single(pdev, |
982 | buffer_info->dma, | |
983 | buffer_info->length, | |
984 | PCI_DMA_FROMDEVICE); | |
23e55a32 BJ |
985 | buffer_info->dma = 0; |
986 | buffer_info->length = 0; | |
987 | } | |
1da177e4 | 988 | |
23e55a32 | 989 | if (buffer_info->skb) { |
1da177e4 | 990 | dev_kfree_skb(buffer_info->skb); |
1da177e4 LT |
991 | buffer_info->skb = NULL; |
992 | } | |
993 | } | |
994 | ||
995 | size = sizeof(struct ixgb_buffer) * rx_ring->count; | |
996 | memset(rx_ring->buffer_info, 0, size); | |
997 | ||
998 | /* Zero out the descriptor ring */ | |
999 | ||
1000 | memset(rx_ring->desc, 0, rx_ring->size); | |
1001 | ||
1002 | rx_ring->next_to_clean = 0; | |
1003 | rx_ring->next_to_use = 0; | |
1004 | ||
1005 | IXGB_WRITE_REG(&adapter->hw, RDH, 0); | |
1006 | IXGB_WRITE_REG(&adapter->hw, RDT, 0); | |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * ixgb_set_mac - Change the Ethernet Address of the NIC | |
1011 | * @netdev: network interface device structure | |
1012 | * @p: pointer to an address structure | |
1013 | * | |
1014 | * Returns 0 on success, negative on failure | |
1015 | **/ | |
1016 | ||
1017 | static int | |
1018 | ixgb_set_mac(struct net_device *netdev, void *p) | |
1019 | { | |
8908c6cd | 1020 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1021 | struct sockaddr *addr = p; |
1022 | ||
03f83041 | 1023 | if (!is_valid_ether_addr(addr->sa_data)) |
1da177e4 LT |
1024 | return -EADDRNOTAVAIL; |
1025 | ||
1026 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1027 | ||
1028 | ixgb_rar_set(&adapter->hw, addr->sa_data, 0); | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * ixgb_set_multi - Multicast and Promiscuous mode set | |
1035 | * @netdev: network interface device structure | |
1036 | * | |
1037 | * The set_multi entry point is called whenever the multicast address | |
1038 | * list or the network interface flags are updated. This routine is | |
1039 | * responsible for configuring the hardware for proper multicast, | |
1040 | * promiscuous mode, and all-multi behavior. | |
1041 | **/ | |
1042 | ||
1043 | static void | |
1044 | ixgb_set_multi(struct net_device *netdev) | |
1045 | { | |
8908c6cd | 1046 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1047 | struct ixgb_hw *hw = &adapter->hw; |
1048 | struct dev_mc_list *mc_ptr; | |
222441a6 | 1049 | u32 rctl; |
1da177e4 LT |
1050 | int i; |
1051 | ||
1052 | /* Check for Promiscuous and All Multicast modes */ | |
1053 | ||
1054 | rctl = IXGB_READ_REG(hw, RCTL); | |
1055 | ||
03f83041 | 1056 | if (netdev->flags & IFF_PROMISC) { |
1da177e4 | 1057 | rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
746b9f02 | 1058 | rctl &= ~IXGB_RCTL_VFE; |
1da177e4 | 1059 | } else { |
746b9f02 PM |
1060 | if (netdev->flags & IFF_ALLMULTI) { |
1061 | rctl |= IXGB_RCTL_MPE; | |
1062 | rctl &= ~IXGB_RCTL_UPE; | |
1063 | } else { | |
1064 | rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); | |
1065 | } | |
78ed11a5 | 1066 | rctl |= IXGB_RCTL_VFE; |
1da177e4 LT |
1067 | } |
1068 | ||
03f83041 | 1069 | if (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { |
1da177e4 LT |
1070 | rctl |= IXGB_RCTL_MPE; |
1071 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1072 | } else { | |
222441a6 | 1073 | u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES * |
273dc74e | 1074 | IXGB_ETH_LENGTH_OF_ADDRESS]; |
1da177e4 LT |
1075 | |
1076 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1077 | ||
0060c072 JB |
1078 | for (i = 0, mc_ptr = netdev->mc_list; |
1079 | mc_ptr; | |
1080 | i++, mc_ptr = mc_ptr->next) | |
1da177e4 | 1081 | memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS], |
0060c072 | 1082 | mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS); |
1da177e4 LT |
1083 | |
1084 | ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0); | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /** | |
1089 | * ixgb_watchdog - Timer Call-back | |
1090 | * @data: pointer to netdev cast into an unsigned long | |
1091 | **/ | |
1092 | ||
1093 | static void | |
1094 | ixgb_watchdog(unsigned long data) | |
1095 | { | |
1096 | struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; | |
1097 | struct net_device *netdev = adapter->netdev; | |
1098 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
1099 | ||
1100 | ixgb_check_for_link(&adapter->hw); | |
1101 | ||
1102 | if (ixgb_check_for_bad_link(&adapter->hw)) { | |
1103 | /* force the reset path */ | |
1104 | netif_stop_queue(netdev); | |
1105 | } | |
1106 | ||
03f83041 JB |
1107 | if (adapter->hw.link_up) { |
1108 | if (!netif_carrier_ok(netdev)) { | |
d276016c JK |
1109 | printk(KERN_INFO "ixgb: %s NIC Link is Up 10 Gbps " |
1110 | "Full Duplex, Flow Control: %s\n", | |
1111 | netdev->name, | |
1112 | (adapter->hw.fc.type == ixgb_fc_full) ? | |
1113 | "RX/TX" : | |
1114 | ((adapter->hw.fc.type == ixgb_fc_rx_pause) ? | |
1115 | "RX" : | |
1116 | ((adapter->hw.fc.type == ixgb_fc_tx_pause) ? | |
1117 | "TX" : "None"))); | |
1da177e4 LT |
1118 | adapter->link_speed = 10000; |
1119 | adapter->link_duplex = FULL_DUPLEX; | |
1120 | netif_carrier_on(netdev); | |
1121 | netif_wake_queue(netdev); | |
1122 | } | |
1123 | } else { | |
03f83041 | 1124 | if (netif_carrier_ok(netdev)) { |
1da177e4 LT |
1125 | adapter->link_speed = 0; |
1126 | adapter->link_duplex = 0; | |
d276016c JK |
1127 | printk(KERN_INFO "ixgb: %s NIC Link is Down\n", |
1128 | netdev->name); | |
1da177e4 LT |
1129 | netif_carrier_off(netdev); |
1130 | netif_stop_queue(netdev); | |
1131 | ||
1132 | } | |
1133 | } | |
1134 | ||
1135 | ixgb_update_stats(adapter); | |
1136 | ||
03f83041 JB |
1137 | if (!netif_carrier_ok(netdev)) { |
1138 | if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { | |
1da177e4 LT |
1139 | /* We've lost link, so the controller stops DMA, |
1140 | * but we've got queued Tx work that's never going | |
1141 | * to get done, so reset controller to flush Tx. | |
1142 | * (Do the reset outside of interrupt context). */ | |
1143 | schedule_work(&adapter->tx_timeout_task); | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | /* Force detection of hung controller every watchdog period */ | |
446490ca | 1148 | adapter->detect_tx_hung = true; |
1da177e4 LT |
1149 | |
1150 | /* generate an interrupt to force clean up of any stragglers */ | |
1151 | IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); | |
1152 | ||
1153 | /* Reset the timer */ | |
1154 | mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); | |
1155 | } | |
1156 | ||
1157 | #define IXGB_TX_FLAGS_CSUM 0x00000001 | |
1158 | #define IXGB_TX_FLAGS_VLAN 0x00000002 | |
1159 | #define IXGB_TX_FLAGS_TSO 0x00000004 | |
1160 | ||
235949d1 | 1161 | static int |
1da177e4 LT |
1162 | ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1163 | { | |
1da177e4 LT |
1164 | struct ixgb_context_desc *context_desc; |
1165 | unsigned int i; | |
222441a6 JP |
1166 | u8 ipcss, ipcso, tucss, tucso, hdr_len; |
1167 | u16 ipcse, tucse, mss; | |
1da177e4 LT |
1168 | int err; |
1169 | ||
89114afd | 1170 | if (likely(skb_is_gso(skb))) { |
adc54139 | 1171 | struct ixgb_buffer *buffer_info; |
eddc9ec5 ACM |
1172 | struct iphdr *iph; |
1173 | ||
1da177e4 LT |
1174 | if (skb_header_cloned(skb)) { |
1175 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1176 | if (err) | |
1177 | return err; | |
1178 | } | |
1179 | ||
ab6a5bb6 | 1180 | hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
7967168c | 1181 | mss = skb_shinfo(skb)->gso_size; |
eddc9ec5 ACM |
1182 | iph = ip_hdr(skb); |
1183 | iph->tot_len = 0; | |
1184 | iph->check = 0; | |
aa8223c7 ACM |
1185 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
1186 | iph->daddr, 0, | |
1187 | IPPROTO_TCP, 0); | |
bbe735e4 | 1188 | ipcss = skb_network_offset(skb); |
eddc9ec5 | 1189 | ipcso = (void *)&(iph->check) - (void *)skb->data; |
ea2ae17d ACM |
1190 | ipcse = skb_transport_offset(skb) - 1; |
1191 | tucss = skb_transport_offset(skb); | |
aa8223c7 | 1192 | tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
1da177e4 LT |
1193 | tucse = 0; |
1194 | ||
1195 | i = adapter->tx_ring.next_to_use; | |
1196 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1197 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1198 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1199 | |
1200 | context_desc->ipcss = ipcss; | |
1201 | context_desc->ipcso = ipcso; | |
1202 | context_desc->ipcse = cpu_to_le16(ipcse); | |
1203 | context_desc->tucss = tucss; | |
1204 | context_desc->tucso = tucso; | |
1205 | context_desc->tucse = cpu_to_le16(tucse); | |
1206 | context_desc->mss = cpu_to_le16(mss); | |
1207 | context_desc->hdr_len = hdr_len; | |
1208 | context_desc->status = 0; | |
1209 | context_desc->cmd_type_len = cpu_to_le32( | |
0060c072 | 1210 | IXGB_CONTEXT_DESC_TYPE |
1da177e4 LT |
1211 | | IXGB_CONTEXT_DESC_CMD_TSE |
1212 | | IXGB_CONTEXT_DESC_CMD_IP | |
1213 | | IXGB_CONTEXT_DESC_CMD_TCP | |
1da177e4 LT |
1214 | | IXGB_CONTEXT_DESC_CMD_IDE |
1215 | | (skb->len - (hdr_len))); | |
1216 | ||
06c2f9ec | 1217 | |
03f83041 | 1218 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1219 | adapter->tx_ring.next_to_use = i; |
1220 | ||
1221 | return 1; | |
1222 | } | |
1da177e4 LT |
1223 | |
1224 | return 0; | |
1225 | } | |
1226 | ||
446490ca | 1227 | static bool |
1da177e4 LT |
1228 | ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1229 | { | |
1230 | struct ixgb_context_desc *context_desc; | |
1231 | unsigned int i; | |
222441a6 | 1232 | u8 css, cso; |
1da177e4 | 1233 | |
03f83041 | 1234 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
adc54139 | 1235 | struct ixgb_buffer *buffer_info; |
ea2ae17d | 1236 | css = skb_transport_offset(skb); |
ff1dcadb | 1237 | cso = css + skb->csum_offset; |
1da177e4 LT |
1238 | |
1239 | i = adapter->tx_ring.next_to_use; | |
1240 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1241 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1242 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1243 | |
1244 | context_desc->tucss = css; | |
1245 | context_desc->tucso = cso; | |
1246 | context_desc->tucse = 0; | |
1247 | /* zero out any previously existing data in one instruction */ | |
222441a6 | 1248 | *(u32 *)&(context_desc->ipcss) = 0; |
1da177e4 LT |
1249 | context_desc->status = 0; |
1250 | context_desc->hdr_len = 0; | |
1251 | context_desc->mss = 0; | |
1252 | context_desc->cmd_type_len = | |
1253 | cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | |
06c2f9ec | 1254 | | IXGB_TX_DESC_CMD_IDE); |
1da177e4 | 1255 | |
03f83041 | 1256 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1257 | adapter->tx_ring.next_to_use = i; |
1258 | ||
446490ca | 1259 | return true; |
1da177e4 LT |
1260 | } |
1261 | ||
446490ca | 1262 | return false; |
1da177e4 LT |
1263 | } |
1264 | ||
1265 | #define IXGB_MAX_TXD_PWR 14 | |
1266 | #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) | |
1267 | ||
235949d1 | 1268 | static int |
1da177e4 LT |
1269 | ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, |
1270 | unsigned int first) | |
1271 | { | |
1272 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1273 | struct ixgb_buffer *buffer_info; | |
fe52eeb8 | 1274 | int len = skb_headlen(skb); |
1da177e4 | 1275 | unsigned int offset = 0, size, count = 0, i; |
5d927853 | 1276 | unsigned int mss = skb_shinfo(skb)->gso_size; |
1da177e4 LT |
1277 | |
1278 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; | |
1279 | unsigned int f; | |
fe52eeb8 | 1280 | dma_addr_t *map; |
1da177e4 LT |
1281 | |
1282 | i = tx_ring->next_to_use; | |
1283 | ||
fe52eeb8 AD |
1284 | if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) { |
1285 | dev_err(&adapter->pdev->dev, "TX DMA map failed\n"); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | map = skb_shinfo(skb)->dma_maps; | |
1290 | ||
9a432992 | 1291 | while (len) { |
1da177e4 | 1292 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1293 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1294 | /* Workaround for premature desc write-backs |
1295 | * in TSO mode. Append 4-byte sentinel desc */ | |
1296 | if (unlikely(mss && !nr_frags && size == len && size > 8)) | |
1297 | size -= 4; | |
1298 | ||
1da177e4 | 1299 | buffer_info->length = size; |
adc54139 | 1300 | WARN_ON(buffer_info->dma != 0); |
34336635 | 1301 | buffer_info->time_stamp = jiffies; |
fe52eeb8 | 1302 | buffer_info->dma = map[0] + offset; |
1da177e4 LT |
1303 | pci_map_single(adapter->pdev, |
1304 | skb->data + offset, | |
1305 | size, | |
1306 | PCI_DMA_TODEVICE); | |
1dfdd7df | 1307 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1308 | |
1309 | len -= size; | |
1310 | offset += size; | |
1311 | count++; | |
fe52eeb8 AD |
1312 | if (len) { |
1313 | i++; | |
1314 | if (i == tx_ring->count) | |
1315 | i = 0; | |
1316 | } | |
1da177e4 LT |
1317 | } |
1318 | ||
1459336d | 1319 | for (f = 0; f < nr_frags; f++) { |
1da177e4 LT |
1320 | struct skb_frag_struct *frag; |
1321 | ||
1322 | frag = &skb_shinfo(skb)->frags[f]; | |
1323 | len = frag->size; | |
1324 | offset = 0; | |
1325 | ||
9a432992 | 1326 | while (len) { |
fe52eeb8 AD |
1327 | i++; |
1328 | if (i == tx_ring->count) | |
1329 | i = 0; | |
1330 | ||
1da177e4 | 1331 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1332 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1333 | |
1334 | /* Workaround for premature desc write-backs | |
1335 | * in TSO mode. Append 4-byte sentinel desc */ | |
19abe86d AK |
1336 | if (unlikely(mss && (f == (nr_frags - 1)) |
1337 | && size == len && size > 8)) | |
5d927853 JB |
1338 | size -= 4; |
1339 | ||
1da177e4 | 1340 | buffer_info->length = size; |
34336635 | 1341 | buffer_info->time_stamp = jiffies; |
fe52eeb8 | 1342 | buffer_info->dma = map[f + 1] + offset; |
1dfdd7df | 1343 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1344 | |
1345 | len -= size; | |
1346 | offset += size; | |
1347 | count++; | |
1da177e4 LT |
1348 | } |
1349 | } | |
1da177e4 LT |
1350 | tx_ring->buffer_info[i].skb = skb; |
1351 | tx_ring->buffer_info[first].next_to_watch = i; | |
1352 | ||
1353 | return count; | |
1354 | } | |
1355 | ||
235949d1 | 1356 | static void |
1da177e4 LT |
1357 | ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) |
1358 | { | |
1359 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1360 | struct ixgb_tx_desc *tx_desc = NULL; | |
1361 | struct ixgb_buffer *buffer_info; | |
222441a6 JP |
1362 | u32 cmd_type_len = adapter->tx_cmd_type; |
1363 | u8 status = 0; | |
1364 | u8 popts = 0; | |
1da177e4 LT |
1365 | unsigned int i; |
1366 | ||
03f83041 | 1367 | if (tx_flags & IXGB_TX_FLAGS_TSO) { |
1da177e4 LT |
1368 | cmd_type_len |= IXGB_TX_DESC_CMD_TSE; |
1369 | popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); | |
1370 | } | |
1371 | ||
03f83041 | 1372 | if (tx_flags & IXGB_TX_FLAGS_CSUM) |
1da177e4 LT |
1373 | popts |= IXGB_TX_DESC_POPTS_TXSM; |
1374 | ||
03f83041 | 1375 | if (tx_flags & IXGB_TX_FLAGS_VLAN) |
1da177e4 | 1376 | cmd_type_len |= IXGB_TX_DESC_CMD_VLE; |
1da177e4 LT |
1377 | |
1378 | i = tx_ring->next_to_use; | |
1379 | ||
9a432992 | 1380 | while (count--) { |
1da177e4 LT |
1381 | buffer_info = &tx_ring->buffer_info[i]; |
1382 | tx_desc = IXGB_TX_DESC(*tx_ring, i); | |
1383 | tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); | |
1384 | tx_desc->cmd_type_len = | |
1385 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
1386 | tx_desc->status = status; | |
1387 | tx_desc->popts = popts; | |
1388 | tx_desc->vlan = cpu_to_le16(vlan_id); | |
1389 | ||
03f83041 | 1390 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1391 | } |
1392 | ||
0060c072 JB |
1393 | tx_desc->cmd_type_len |= |
1394 | cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); | |
1da177e4 LT |
1395 | |
1396 | /* Force memory writes to complete before letting h/w | |
1397 | * know there are new descriptors to fetch. (Only | |
1398 | * applicable for weak-ordered memory model archs, | |
1399 | * such as IA-64). */ | |
1400 | wmb(); | |
1401 | ||
1402 | tx_ring->next_to_use = i; | |
1403 | IXGB_WRITE_REG(&adapter->hw, TDT, i); | |
1404 | } | |
1405 | ||
dfd341e4 JB |
1406 | static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) |
1407 | { | |
1408 | struct ixgb_adapter *adapter = netdev_priv(netdev); | |
1409 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1410 | ||
1411 | netif_stop_queue(netdev); | |
1412 | /* Herbert's original patch had: | |
1413 | * smp_mb__after_netif_stop_queue(); | |
1414 | * but since that doesn't exist yet, just open code it. */ | |
1415 | smp_mb(); | |
1416 | ||
1417 | /* We need to check again in a case another CPU has just | |
1418 | * made room available. */ | |
1419 | if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) | |
1420 | return -EBUSY; | |
1421 | ||
1422 | /* A reprieve! */ | |
1423 | netif_start_queue(netdev); | |
1424 | ++adapter->restart_queue; | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int ixgb_maybe_stop_tx(struct net_device *netdev, | |
1429 | struct ixgb_desc_ring *tx_ring, int size) | |
1430 | { | |
1431 | if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) | |
1432 | return 0; | |
1433 | return __ixgb_maybe_stop_tx(netdev, size); | |
1434 | } | |
1435 | ||
1436 | ||
1da177e4 LT |
1437 | /* Tx Descriptors needed, worst case */ |
1438 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ | |
1439 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | |
5d927853 JB |
1440 | #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ |
1441 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ | |
1442 | + 1 /* one more needed for sentinel TSO workaround */ | |
1da177e4 LT |
1443 | |
1444 | static int | |
1445 | ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |
1446 | { | |
8908c6cd | 1447 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1448 | unsigned int first; |
1449 | unsigned int tx_flags = 0; | |
1da177e4 | 1450 | int vlan_id = 0; |
fe52eeb8 | 1451 | int count = 0; |
1da177e4 LT |
1452 | int tso; |
1453 | ||
bab2bce7 JB |
1454 | if (test_bit(__IXGB_DOWN, &adapter->flags)) { |
1455 | dev_kfree_skb(skb); | |
1456 | return NETDEV_TX_OK; | |
1457 | } | |
1458 | ||
03f83041 | 1459 | if (skb->len <= 0) { |
c2199340 | 1460 | dev_kfree_skb(skb); |
1da177e4 LT |
1461 | return 0; |
1462 | } | |
1463 | ||
dfd341e4 | 1464 | if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
db582944 | 1465 | DESC_NEEDED))) |
f017f14b | 1466 | return NETDEV_TX_BUSY; |
1da177e4 | 1467 | |
03f83041 | 1468 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
1da177e4 LT |
1469 | tx_flags |= IXGB_TX_FLAGS_VLAN; |
1470 | vlan_id = vlan_tx_tag_get(skb); | |
1471 | } | |
1472 | ||
1473 | first = adapter->tx_ring.next_to_use; | |
0060c072 | 1474 | |
1da177e4 LT |
1475 | tso = ixgb_tso(adapter, skb); |
1476 | if (tso < 0) { | |
c2199340 | 1477 | dev_kfree_skb(skb); |
1da177e4 LT |
1478 | return NETDEV_TX_OK; |
1479 | } | |
1480 | ||
96f9c2e2 | 1481 | if (likely(tso)) |
1da177e4 | 1482 | tx_flags |= IXGB_TX_FLAGS_TSO; |
03f83041 | 1483 | else if (ixgb_tx_csum(adapter, skb)) |
1da177e4 LT |
1484 | tx_flags |= IXGB_TX_FLAGS_CSUM; |
1485 | ||
fe52eeb8 | 1486 | count = ixgb_tx_map(adapter, skb, first); |
1da177e4 | 1487 | |
fe52eeb8 AD |
1488 | if (count) { |
1489 | ixgb_tx_queue(adapter, count, vlan_id, tx_flags); | |
1490 | netdev->trans_start = jiffies; | |
1491 | /* Make sure there is space in the ring for the next send. */ | |
1492 | ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); | |
1da177e4 | 1493 | |
fe52eeb8 AD |
1494 | } else { |
1495 | dev_kfree_skb_any(skb); | |
1496 | adapter->tx_ring.buffer_info[first].time_stamp = 0; | |
1497 | adapter->tx_ring.next_to_use = first; | |
1498 | } | |
f017f14b | 1499 | |
f017f14b | 1500 | return NETDEV_TX_OK; |
1da177e4 LT |
1501 | } |
1502 | ||
1503 | /** | |
1504 | * ixgb_tx_timeout - Respond to a Tx Hang | |
1505 | * @netdev: network interface device structure | |
1506 | **/ | |
1507 | ||
1508 | static void | |
1509 | ixgb_tx_timeout(struct net_device *netdev) | |
1510 | { | |
8908c6cd | 1511 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1512 | |
1513 | /* Do the reset outside of interrupt context */ | |
1514 | schedule_work(&adapter->tx_timeout_task); | |
1515 | } | |
1516 | ||
1517 | static void | |
c4028958 | 1518 | ixgb_tx_timeout_task(struct work_struct *work) |
1da177e4 | 1519 | { |
c4028958 DH |
1520 | struct ixgb_adapter *adapter = |
1521 | container_of(work, struct ixgb_adapter, tx_timeout_task); | |
1da177e4 | 1522 | |
9b8118df | 1523 | adapter->tx_timeout_count++; |
446490ca | 1524 | ixgb_down(adapter, true); |
1da177e4 LT |
1525 | ixgb_up(adapter); |
1526 | } | |
1527 | ||
1528 | /** | |
1529 | * ixgb_get_stats - Get System Network Statistics | |
1530 | * @netdev: network interface device structure | |
1531 | * | |
1532 | * Returns the address of the device statistics structure. | |
1533 | * The statistics are actually updated from the timer callback. | |
1534 | **/ | |
1535 | ||
1536 | static struct net_device_stats * | |
1537 | ixgb_get_stats(struct net_device *netdev) | |
1538 | { | |
8908c6cd | 1539 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1540 | |
1541 | return &adapter->net_stats; | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * ixgb_change_mtu - Change the Maximum Transfer Unit | |
1546 | * @netdev: network interface device structure | |
1547 | * @new_mtu: new value for maximum frame size | |
1548 | * | |
1549 | * Returns 0 on success, negative on failure | |
1550 | **/ | |
1551 | ||
1552 | static int | |
1553 | ixgb_change_mtu(struct net_device *netdev, int new_mtu) | |
1554 | { | |
8908c6cd | 1555 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1556 | int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
1557 | int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; | |
1558 | ||
a65a604a JB |
1559 | /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ |
1560 | if ((new_mtu < 68) || | |
1561 | (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { | |
ec9c3f5d | 1562 | DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu); |
1da177e4 LT |
1563 | return -EINVAL; |
1564 | } | |
1565 | ||
b5ca88eb JB |
1566 | if (old_max_frame == max_frame) |
1567 | return 0; | |
1568 | ||
1569 | if (netif_running(netdev)) | |
1570 | ixgb_down(adapter, true); | |
1571 | ||
a3dc3da0 | 1572 | adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ |
1da177e4 LT |
1573 | |
1574 | netdev->mtu = new_mtu; | |
1575 | ||
b5ca88eb | 1576 | if (netif_running(netdev)) |
1da177e4 | 1577 | ixgb_up(adapter); |
1da177e4 LT |
1578 | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | /** | |
1583 | * ixgb_update_stats - Update the board statistics counters. | |
1584 | * @adapter: board private structure | |
1585 | **/ | |
1586 | ||
1587 | void | |
1588 | ixgb_update_stats(struct ixgb_adapter *adapter) | |
1589 | { | |
5633684d | 1590 | struct net_device *netdev = adapter->netdev; |
01748fbb LV |
1591 | struct pci_dev *pdev = adapter->pdev; |
1592 | ||
1593 | /* Prevent stats update while adapter is being reset */ | |
81b1955e | 1594 | if (pci_channel_offline(pdev)) |
01748fbb | 1595 | return; |
5633684d | 1596 | |
03f83041 | 1597 | if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || |
5633684d MC |
1598 | (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { |
1599 | u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); | |
1600 | u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); | |
1601 | u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); | |
0060c072 | 1602 | u64 bcast = ((u64)bcast_h << 32) | bcast_l; |
5633684d MC |
1603 | |
1604 | multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); | |
1605 | /* fix up multicast stats by removing broadcasts */ | |
03f83041 | 1606 | if (multi >= bcast) |
7b89178d | 1607 | multi -= bcast; |
0060c072 | 1608 | |
5633684d MC |
1609 | adapter->stats.mprcl += (multi & 0xFFFFFFFF); |
1610 | adapter->stats.mprch += (multi >> 32); | |
0060c072 | 1611 | adapter->stats.bprcl += bcast_l; |
5633684d MC |
1612 | adapter->stats.bprch += bcast_h; |
1613 | } else { | |
1614 | adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); | |
1615 | adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); | |
1616 | adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); | |
1617 | adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); | |
1618 | } | |
1da177e4 LT |
1619 | adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
1620 | adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); | |
1621 | adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); | |
1622 | adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); | |
1da177e4 LT |
1623 | adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
1624 | adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); | |
1625 | adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); | |
1626 | adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); | |
1627 | adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); | |
1628 | adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); | |
1629 | adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); | |
1630 | adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); | |
1631 | adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); | |
1632 | adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); | |
1633 | adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); | |
1634 | adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); | |
1635 | adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); | |
1636 | adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); | |
1637 | adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); | |
1638 | adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); | |
1639 | adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); | |
1640 | adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); | |
1641 | adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); | |
1642 | adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); | |
1643 | adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); | |
1644 | adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); | |
1645 | adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); | |
1646 | adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); | |
1647 | adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); | |
1648 | adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); | |
1649 | adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); | |
1650 | adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); | |
1651 | adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); | |
1652 | adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); | |
1653 | adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); | |
1654 | adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); | |
1655 | adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); | |
1656 | adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); | |
1657 | adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); | |
1658 | adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); | |
1659 | adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); | |
1660 | adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); | |
1661 | adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); | |
1662 | adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); | |
1663 | adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); | |
1664 | adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); | |
1665 | adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); | |
1666 | adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); | |
1667 | adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); | |
1668 | adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); | |
1669 | adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); | |
1670 | adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); | |
1671 | adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); | |
1672 | adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); | |
1673 | adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); | |
1674 | adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); | |
1675 | ||
1676 | /* Fill out the OS statistics structure */ | |
1677 | ||
1678 | adapter->net_stats.rx_packets = adapter->stats.gprcl; | |
1679 | adapter->net_stats.tx_packets = adapter->stats.gptcl; | |
1680 | adapter->net_stats.rx_bytes = adapter->stats.gorcl; | |
1681 | adapter->net_stats.tx_bytes = adapter->stats.gotcl; | |
1682 | adapter->net_stats.multicast = adapter->stats.mprcl; | |
1683 | adapter->net_stats.collisions = 0; | |
1684 | ||
1685 | /* ignore RLEC as it reports errors for padded (<64bytes) frames | |
1686 | * with a length in the type/len field */ | |
1687 | adapter->net_stats.rx_errors = | |
1688 | /* adapter->stats.rnbc + */ adapter->stats.crcerrs + | |
1689 | adapter->stats.ruc + | |
1690 | adapter->stats.roc /*+ adapter->stats.rlec */ + | |
1691 | adapter->stats.icbc + | |
1692 | adapter->stats.ecbc + adapter->stats.mpc; | |
1693 | ||
1da177e4 LT |
1694 | /* see above |
1695 | * adapter->net_stats.rx_length_errors = adapter->stats.rlec; | |
1696 | */ | |
1697 | ||
1698 | adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; | |
1699 | adapter->net_stats.rx_fifo_errors = adapter->stats.mpc; | |
1700 | adapter->net_stats.rx_missed_errors = adapter->stats.mpc; | |
1701 | adapter->net_stats.rx_over_errors = adapter->stats.mpc; | |
1702 | ||
1703 | adapter->net_stats.tx_errors = 0; | |
1704 | adapter->net_stats.rx_frame_errors = 0; | |
1705 | adapter->net_stats.tx_aborted_errors = 0; | |
1706 | adapter->net_stats.tx_carrier_errors = 0; | |
1707 | adapter->net_stats.tx_fifo_errors = 0; | |
1708 | adapter->net_stats.tx_heartbeat_errors = 0; | |
1709 | adapter->net_stats.tx_window_errors = 0; | |
1710 | } | |
1711 | ||
1712 | #define IXGB_MAX_INTR 10 | |
1713 | /** | |
1714 | * ixgb_intr - Interrupt Handler | |
1715 | * @irq: interrupt number | |
1716 | * @data: pointer to a network interface device structure | |
1da177e4 LT |
1717 | **/ |
1718 | ||
1719 | static irqreturn_t | |
7d12e780 | 1720 | ixgb_intr(int irq, void *data) |
1da177e4 LT |
1721 | { |
1722 | struct net_device *netdev = data; | |
8908c6cd | 1723 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1724 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 | 1725 | u32 icr = IXGB_READ_REG(hw, ICR); |
1da177e4 | 1726 | |
03f83041 | 1727 | if (unlikely(!icr)) |
1da177e4 LT |
1728 | return IRQ_NONE; /* Not our interrupt */ |
1729 | ||
bab2bce7 JB |
1730 | if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) |
1731 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) | |
1732 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1da177e4 | 1733 | |
288379f0 | 1734 | if (napi_schedule_prep(&adapter->napi)) { |
1da177e4 | 1735 | |
0060c072 | 1736 | /* Disable interrupts and register for poll. The flush |
1da177e4 LT |
1737 | of the posted write is intentionally left out. |
1738 | */ | |
1739 | ||
1da177e4 | 1740 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
288379f0 | 1741 | __napi_schedule(&adapter->napi); |
1da177e4 | 1742 | } |
1da177e4 LT |
1743 | return IRQ_HANDLED; |
1744 | } | |
1745 | ||
1da177e4 LT |
1746 | /** |
1747 | * ixgb_clean - NAPI Rx polling callback | |
1748 | * @adapter: board private structure | |
1749 | **/ | |
1750 | ||
1751 | static int | |
bea3348e | 1752 | ixgb_clean(struct napi_struct *napi, int budget) |
1da177e4 | 1753 | { |
bea3348e | 1754 | struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); |
1da177e4 LT |
1755 | int work_done = 0; |
1756 | ||
53e52c72 | 1757 | ixgb_clean_tx_irq(adapter); |
bea3348e | 1758 | ixgb_clean_rx_irq(adapter, &work_done, budget); |
1da177e4 | 1759 | |
53e52c72 DM |
1760 | /* If budget not fully consumed, exit the polling mode */ |
1761 | if (work_done < budget) { | |
288379f0 | 1762 | napi_complete(napi); |
72ab5195 JB |
1763 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
1764 | ixgb_irq_enable(adapter); | |
1da177e4 LT |
1765 | } |
1766 | ||
bea3348e | 1767 | return work_done; |
1da177e4 | 1768 | } |
1da177e4 LT |
1769 | |
1770 | /** | |
1771 | * ixgb_clean_tx_irq - Reclaim resources after transmit completes | |
1772 | * @adapter: board private structure | |
1773 | **/ | |
1774 | ||
446490ca | 1775 | static bool |
1da177e4 LT |
1776 | ixgb_clean_tx_irq(struct ixgb_adapter *adapter) |
1777 | { | |
1778 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1779 | struct net_device *netdev = adapter->netdev; | |
1780 | struct ixgb_tx_desc *tx_desc, *eop_desc; | |
1781 | struct ixgb_buffer *buffer_info; | |
1782 | unsigned int i, eop; | |
446490ca | 1783 | bool cleaned = false; |
1da177e4 LT |
1784 | |
1785 | i = tx_ring->next_to_clean; | |
1786 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1787 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1788 | ||
9a432992 | 1789 | while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { |
1da177e4 | 1790 | |
446490ca | 1791 | for (cleaned = false; !cleaned; ) { |
1da177e4 LT |
1792 | tx_desc = IXGB_TX_DESC(*tx_ring, i); |
1793 | buffer_info = &tx_ring->buffer_info[i]; | |
1794 | ||
0060c072 JB |
1795 | if (tx_desc->popts & |
1796 | (IXGB_TX_DESC_POPTS_TXSM | | |
1797 | IXGB_TX_DESC_POPTS_IXSM)) | |
1da177e4 LT |
1798 | adapter->hw_csum_tx_good++; |
1799 | ||
1800 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1801 | ||
222441a6 | 1802 | *(u32 *)&(tx_desc->status) = 0; |
1da177e4 LT |
1803 | |
1804 | cleaned = (i == eop); | |
03f83041 | 1805 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1806 | } |
1807 | ||
1808 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1809 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1810 | } | |
1811 | ||
1812 | tx_ring->next_to_clean = i; | |
1813 | ||
0f8ecbad JB |
1814 | if (unlikely(cleaned && netif_carrier_ok(netdev) && |
1815 | IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { | |
1816 | /* Make sure that anybody stopping the queue after this | |
1817 | * sees the new next_to_clean. */ | |
1818 | smp_mb(); | |
1819 | ||
1820 | if (netif_queue_stopped(netdev) && | |
1821 | !(test_bit(__IXGB_DOWN, &adapter->flags))) { | |
3352a3b2 | 1822 | netif_wake_queue(netdev); |
0f8ecbad JB |
1823 | ++adapter->restart_queue; |
1824 | } | |
1da177e4 | 1825 | } |
1da177e4 | 1826 | |
03f83041 | 1827 | if (adapter->detect_tx_hung) { |
1da177e4 LT |
1828 | /* detect a transmit hang in hardware, this serializes the |
1829 | * check with the clearing of time_stamp and movement of i */ | |
446490ca | 1830 | adapter->detect_tx_hung = false; |
fe52eeb8 | 1831 | if (tx_ring->buffer_info[eop].time_stamp && |
9b8118df | 1832 | time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) |
1da177e4 | 1833 | && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
9b8118df AK |
1834 | IXGB_STATUS_TXOFF)) { |
1835 | /* detected Tx unit hang */ | |
1836 | DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" | |
1837 | " TDH <%x>\n" | |
1838 | " TDT <%x>\n" | |
1839 | " next_to_use <%x>\n" | |
1840 | " next_to_clean <%x>\n" | |
1841 | "buffer_info[next_to_clean]\n" | |
1842 | " time_stamp <%lx>\n" | |
1843 | " next_to_watch <%x>\n" | |
1844 | " jiffies <%lx>\n" | |
1845 | " next_to_watch.status <%x>\n", | |
1846 | IXGB_READ_REG(&adapter->hw, TDH), | |
1847 | IXGB_READ_REG(&adapter->hw, TDT), | |
1848 | tx_ring->next_to_use, | |
1849 | tx_ring->next_to_clean, | |
1850 | tx_ring->buffer_info[eop].time_stamp, | |
1851 | eop, | |
1852 | jiffies, | |
1853 | eop_desc->status); | |
1da177e4 | 1854 | netif_stop_queue(netdev); |
9b8118df | 1855 | } |
1da177e4 LT |
1856 | } |
1857 | ||
1858 | return cleaned; | |
1859 | } | |
1860 | ||
1861 | /** | |
1862 | * ixgb_rx_checksum - Receive Checksum Offload for 82597. | |
1863 | * @adapter: board private structure | |
1864 | * @rx_desc: receive descriptor | |
1865 | * @sk_buff: socket buffer with received data | |
1866 | **/ | |
1867 | ||
235949d1 | 1868 | static void |
1da177e4 | 1869 | ixgb_rx_checksum(struct ixgb_adapter *adapter, |
0060c072 JB |
1870 | struct ixgb_rx_desc *rx_desc, |
1871 | struct sk_buff *skb) | |
1da177e4 LT |
1872 | { |
1873 | /* Ignore Checksum bit is set OR | |
1874 | * TCP Checksum has not been calculated | |
1875 | */ | |
03f83041 | 1876 | if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || |
1da177e4 LT |
1877 | (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { |
1878 | skb->ip_summed = CHECKSUM_NONE; | |
1879 | return; | |
1880 | } | |
1881 | ||
1882 | /* At this point we know the hardware did the TCP checksum */ | |
1883 | /* now look at the TCP checksum error bit */ | |
03f83041 | 1884 | if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { |
1da177e4 LT |
1885 | /* let the stack verify checksum errors */ |
1886 | skb->ip_summed = CHECKSUM_NONE; | |
1887 | adapter->hw_csum_rx_error++; | |
1888 | } else { | |
1889 | /* TCP checksum is good */ | |
1890 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1891 | adapter->hw_csum_rx_good++; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | /** | |
1896 | * ixgb_clean_rx_irq - Send received data up the network stack, | |
1897 | * @adapter: board private structure | |
1898 | **/ | |
1899 | ||
446490ca | 1900 | static bool |
1da177e4 | 1901 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) |
1da177e4 LT |
1902 | { |
1903 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
1904 | struct net_device *netdev = adapter->netdev; | |
1905 | struct pci_dev *pdev = adapter->pdev; | |
1906 | struct ixgb_rx_desc *rx_desc, *next_rxd; | |
1907 | struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; | |
222441a6 | 1908 | u32 length; |
1da177e4 | 1909 | unsigned int i, j; |
fc2d14e3 | 1910 | int cleaned_count = 0; |
446490ca | 1911 | bool cleaned = false; |
1da177e4 LT |
1912 | |
1913 | i = rx_ring->next_to_clean; | |
1914 | rx_desc = IXGB_RX_DESC(*rx_ring, i); | |
1915 | buffer_info = &rx_ring->buffer_info[i]; | |
1916 | ||
9a432992 | 1917 | while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { |
fc2d14e3 | 1918 | struct sk_buff *skb; |
f404de1c | 1919 | u8 status; |
1da177e4 | 1920 | |
03f83041 | 1921 | if (*work_done >= work_to_do) |
1da177e4 LT |
1922 | break; |
1923 | ||
1924 | (*work_done)++; | |
f404de1c | 1925 | status = rx_desc->status; |
1da177e4 | 1926 | skb = buffer_info->skb; |
1dfdd7df | 1927 | buffer_info->skb = NULL; |
f404de1c | 1928 | |
fc2d14e3 | 1929 | prefetch(skb->data - NET_IP_ALIGN); |
1da177e4 | 1930 | |
03f83041 | 1931 | if (++i == rx_ring->count) i = 0; |
1da177e4 LT |
1932 | next_rxd = IXGB_RX_DESC(*rx_ring, i); |
1933 | prefetch(next_rxd); | |
1934 | ||
03f83041 | 1935 | if ((j = i + 1) == rx_ring->count) j = 0; |
1da177e4 LT |
1936 | next2_buffer = &rx_ring->buffer_info[j]; |
1937 | prefetch(next2_buffer); | |
1938 | ||
1939 | next_buffer = &rx_ring->buffer_info[i]; | |
1da177e4 | 1940 | |
446490ca | 1941 | cleaned = true; |
fc2d14e3 | 1942 | cleaned_count++; |
1da177e4 LT |
1943 | |
1944 | pci_unmap_single(pdev, | |
1945 | buffer_info->dma, | |
1946 | buffer_info->length, | |
1947 | PCI_DMA_FROMDEVICE); | |
fc2d14e3 | 1948 | buffer_info->dma = 0; |
1da177e4 LT |
1949 | |
1950 | length = le16_to_cpu(rx_desc->length); | |
fc2d14e3 | 1951 | rx_desc->length = 0; |
1da177e4 | 1952 | |
03f83041 | 1953 | if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
1da177e4 LT |
1954 | |
1955 | /* All receives must fit into a single buffer */ | |
1956 | ||
1957 | IXGB_DBG("Receive packet consumed multiple buffers " | |
1958 | "length<%x>\n", length); | |
1959 | ||
1960 | dev_kfree_skb_irq(skb); | |
f404de1c | 1961 | goto rxdesc_done; |
1da177e4 LT |
1962 | } |
1963 | ||
0060c072 JB |
1964 | if (unlikely(rx_desc->errors & |
1965 | (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | | |
1966 | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { | |
1da177e4 | 1967 | dev_kfree_skb_irq(skb); |
f404de1c | 1968 | goto rxdesc_done; |
1da177e4 LT |
1969 | } |
1970 | ||
6b900bb4 AK |
1971 | /* code added for copybreak, this should improve |
1972 | * performance for small packets with large amounts | |
1973 | * of reassembly being done in the stack */ | |
d9fed18b | 1974 | if (length < copybreak) { |
6b900bb4 | 1975 | struct sk_buff *new_skb = |
5791704f | 1976 | netdev_alloc_skb(netdev, length + NET_IP_ALIGN); |
6b900bb4 AK |
1977 | if (new_skb) { |
1978 | skb_reserve(new_skb, NET_IP_ALIGN); | |
27d7ff46 ACM |
1979 | skb_copy_to_linear_data_offset(new_skb, |
1980 | -NET_IP_ALIGN, | |
1981 | (skb->data - | |
1982 | NET_IP_ALIGN), | |
1983 | (length + | |
1984 | NET_IP_ALIGN)); | |
6b900bb4 AK |
1985 | /* save the skb in buffer_info as good */ |
1986 | buffer_info->skb = skb; | |
1987 | skb = new_skb; | |
1988 | } | |
1989 | } | |
1990 | /* end copybreak code */ | |
1991 | ||
1da177e4 LT |
1992 | /* Good Receive */ |
1993 | skb_put(skb, length); | |
1994 | ||
1995 | /* Receive Checksum Offload */ | |
1996 | ixgb_rx_checksum(adapter, rx_desc, skb); | |
1997 | ||
1998 | skb->protocol = eth_type_trans(skb, netdev); | |
03f83041 | 1999 | if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { |
1da177e4 | 2000 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, |
0060c072 | 2001 | le16_to_cpu(rx_desc->special)); |
1da177e4 LT |
2002 | } else { |
2003 | netif_receive_skb(skb); | |
2004 | } | |
1da177e4 | 2005 | |
f404de1c MC |
2006 | rxdesc_done: |
2007 | /* clean up descriptor, might be written over by hw */ | |
1da177e4 | 2008 | rx_desc->status = 0; |
1da177e4 | 2009 | |
fc2d14e3 JB |
2010 | /* return some buffers to hardware, one at a time is too slow */ |
2011 | if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { | |
2012 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
2013 | cleaned_count = 0; | |
2014 | } | |
2015 | ||
f404de1c | 2016 | /* use prefetched values */ |
1da177e4 LT |
2017 | rx_desc = next_rxd; |
2018 | buffer_info = next_buffer; | |
2019 | } | |
2020 | ||
2021 | rx_ring->next_to_clean = i; | |
2022 | ||
fc2d14e3 JB |
2023 | cleaned_count = IXGB_DESC_UNUSED(rx_ring); |
2024 | if (cleaned_count) | |
2025 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
1da177e4 LT |
2026 | |
2027 | return cleaned; | |
2028 | } | |
2029 | ||
2030 | /** | |
2031 | * ixgb_alloc_rx_buffers - Replace used receive buffers | |
2032 | * @adapter: address of board private structure | |
2033 | **/ | |
2034 | ||
2035 | static void | |
fc2d14e3 | 2036 | ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) |
1da177e4 LT |
2037 | { |
2038 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
2039 | struct net_device *netdev = adapter->netdev; | |
2040 | struct pci_dev *pdev = adapter->pdev; | |
2041 | struct ixgb_rx_desc *rx_desc; | |
2042 | struct ixgb_buffer *buffer_info; | |
2043 | struct sk_buff *skb; | |
2044 | unsigned int i; | |
1da177e4 LT |
2045 | long cleancount; |
2046 | ||
2047 | i = rx_ring->next_to_use; | |
2048 | buffer_info = &rx_ring->buffer_info[i]; | |
2049 | cleancount = IXGB_DESC_UNUSED(rx_ring); | |
2050 | ||
1da177e4 | 2051 | |
41639fed | 2052 | /* leave three descriptors unused */ |
fc2d14e3 | 2053 | while (--cleancount > 2 && cleaned_count--) { |
1dfdd7df | 2054 | /* recycle! its good for you */ |
69c7a940 AK |
2055 | skb = buffer_info->skb; |
2056 | if (skb) { | |
1dfdd7df AK |
2057 | skb_trim(skb, 0); |
2058 | goto map_skb; | |
2059 | } | |
1da177e4 | 2060 | |
69c7a940 AK |
2061 | skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len |
2062 | + NET_IP_ALIGN); | |
1dfdd7df | 2063 | if (unlikely(!skb)) { |
1da177e4 | 2064 | /* Better luck next round */ |
1dfdd7df | 2065 | adapter->alloc_rx_buff_failed++; |
1da177e4 LT |
2066 | break; |
2067 | } | |
2068 | ||
2069 | /* Make buffer alignment 2 beyond a 16 byte boundary | |
2070 | * this will result in a 16 byte aligned IP header after | |
2071 | * the 14 byte MAC header is removed | |
2072 | */ | |
2073 | skb_reserve(skb, NET_IP_ALIGN); | |
2074 | ||
1da177e4 LT |
2075 | buffer_info->skb = skb; |
2076 | buffer_info->length = adapter->rx_buffer_len; | |
1dfdd7df AK |
2077 | map_skb: |
2078 | buffer_info->dma = pci_map_single(pdev, | |
2079 | skb->data, | |
2080 | adapter->rx_buffer_len, | |
2081 | PCI_DMA_FROMDEVICE); | |
1da177e4 | 2082 | |
1dfdd7df | 2083 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
1da177e4 | 2084 | rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
41639fed | 2085 | /* guarantee DD bit not set now before h/w gets descriptor |
0060c072 | 2086 | * this is the rest of the workaround for h/w double |
41639fed MC |
2087 | * writeback. */ |
2088 | rx_desc->status = 0; | |
1da177e4 | 2089 | |
1da177e4 | 2090 | |
03f83041 | 2091 | if (++i == rx_ring->count) i = 0; |
1da177e4 LT |
2092 | buffer_info = &rx_ring->buffer_info[i]; |
2093 | } | |
2094 | ||
1dfdd7df AK |
2095 | if (likely(rx_ring->next_to_use != i)) { |
2096 | rx_ring->next_to_use = i; | |
2097 | if (unlikely(i-- == 0)) | |
2098 | i = (rx_ring->count - 1); | |
2099 | ||
2100 | /* Force memory writes to complete before letting h/w | |
2101 | * know there are new descriptors to fetch. (Only | |
2102 | * applicable for weak-ordered memory model archs, such | |
2103 | * as IA-64). */ | |
2104 | wmb(); | |
2105 | IXGB_WRITE_REG(&adapter->hw, RDT, i); | |
2106 | } | |
1da177e4 LT |
2107 | } |
2108 | ||
2109 | /** | |
2110 | * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. | |
0060c072 | 2111 | * |
1da177e4 LT |
2112 | * @param netdev network interface device structure |
2113 | * @param grp indicates to enable or disable tagging/stripping | |
2114 | **/ | |
2115 | static void | |
2116 | ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) | |
2117 | { | |
8908c6cd | 2118 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2119 | u32 ctrl, rctl; |
1da177e4 LT |
2120 | |
2121 | ixgb_irq_disable(adapter); | |
2122 | adapter->vlgrp = grp; | |
2123 | ||
03f83041 | 2124 | if (grp) { |
1da177e4 LT |
2125 | /* enable VLAN tag insert/strip */ |
2126 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2127 | ctrl |= IXGB_CTRL0_VME; | |
2128 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
2129 | ||
2130 | /* enable VLAN receive filtering */ | |
2131 | ||
2132 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
1da177e4 LT |
2133 | rctl &= ~IXGB_RCTL_CFIEN; |
2134 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
2135 | } else { | |
2136 | /* disable VLAN tag insert/strip */ | |
2137 | ||
2138 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2139 | ctrl &= ~IXGB_CTRL0_VME; | |
2140 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
1da177e4 LT |
2141 | } |
2142 | ||
bab2bce7 JB |
2143 | /* don't enable interrupts unless we are UP */ |
2144 | if (adapter->netdev->flags & IFF_UP) | |
2145 | ixgb_irq_enable(adapter); | |
1da177e4 LT |
2146 | } |
2147 | ||
2148 | static void | |
222441a6 | 2149 | ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2150 | { |
8908c6cd | 2151 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2152 | u32 vfta, index; |
1da177e4 LT |
2153 | |
2154 | /* add VID to filter table */ | |
2155 | ||
2156 | index = (vid >> 5) & 0x7F; | |
2157 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2158 | vfta |= (1 << (vid & 0x1F)); | |
2159 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2160 | } | |
2161 | ||
2162 | static void | |
222441a6 | 2163 | ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2164 | { |
8908c6cd | 2165 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2166 | u32 vfta, index; |
1da177e4 LT |
2167 | |
2168 | ixgb_irq_disable(adapter); | |
2169 | ||
5c15bdec | 2170 | vlan_group_set_device(adapter->vlgrp, vid, NULL); |
1da177e4 | 2171 | |
bab2bce7 JB |
2172 | /* don't enable interrupts unless we are UP */ |
2173 | if (adapter->netdev->flags & IFF_UP) | |
2174 | ixgb_irq_enable(adapter); | |
1da177e4 | 2175 | |
bab2bce7 | 2176 | /* remove VID from filter table */ |
1da177e4 LT |
2177 | |
2178 | index = (vid >> 5) & 0x7F; | |
2179 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2180 | vfta &= ~(1 << (vid & 0x1F)); | |
2181 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2182 | } | |
2183 | ||
2184 | static void | |
2185 | ixgb_restore_vlan(struct ixgb_adapter *adapter) | |
2186 | { | |
2187 | ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); | |
2188 | ||
03f83041 | 2189 | if (adapter->vlgrp) { |
222441a6 | 2190 | u16 vid; |
1459336d | 2191 | for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { |
03f83041 | 2192 | if (!vlan_group_get_device(adapter->vlgrp, vid)) |
1da177e4 LT |
2193 | continue; |
2194 | ixgb_vlan_rx_add_vid(adapter->netdev, vid); | |
2195 | } | |
2196 | } | |
2197 | } | |
2198 | ||
1da177e4 LT |
2199 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2200 | /* | |
2201 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2202 | * without having to re-enable interrupts. It's not called while | |
2203 | * the interrupt routine is executing. | |
2204 | */ | |
2205 | ||
2206 | static void ixgb_netpoll(struct net_device *dev) | |
2207 | { | |
f990b426 | 2208 | struct ixgb_adapter *adapter = netdev_priv(dev); |
ac79c82e | 2209 | |
1da177e4 | 2210 | disable_irq(adapter->pdev->irq); |
7d12e780 | 2211 | ixgb_intr(adapter->pdev->irq, dev); |
1da177e4 LT |
2212 | enable_irq(adapter->pdev->irq); |
2213 | } | |
2214 | #endif | |
2215 | ||
01748fbb LV |
2216 | /** |
2217 | * ixgb_io_error_detected() - called when PCI error is detected | |
2218 | * @pdev pointer to pci device with error | |
2219 | * @state pci channel state after error | |
2220 | * | |
2221 | * This callback is called by the PCI subsystem whenever | |
2222 | * a PCI bus error is detected. | |
2223 | */ | |
0060c072 JB |
2224 | static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, |
2225 | enum pci_channel_state state) | |
01748fbb LV |
2226 | { |
2227 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2228 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2229 | |
03f83041 | 2230 | if (netif_running(netdev)) |
446490ca | 2231 | ixgb_down(adapter, true); |
01748fbb LV |
2232 | |
2233 | pci_disable_device(pdev); | |
2234 | ||
2235 | /* Request a slot reset. */ | |
2236 | return PCI_ERS_RESULT_NEED_RESET; | |
2237 | } | |
2238 | ||
2239 | /** | |
2240 | * ixgb_io_slot_reset - called after the pci bus has been reset. | |
2241 | * @pdev pointer to pci device with error | |
2242 | * | |
52035bdb | 2243 | * This callback is called after the PCI bus has been reset. |
01748fbb LV |
2244 | * Basically, this tries to restart the card from scratch. |
2245 | * This is a shortened version of the device probe/discovery code, | |
2246 | * it resembles the first-half of the ixgb_probe() routine. | |
2247 | */ | |
0060c072 | 2248 | static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) |
01748fbb LV |
2249 | { |
2250 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2251 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2252 | |
03f83041 | 2253 | if (pci_enable_device(pdev)) { |
01748fbb LV |
2254 | DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n"); |
2255 | return PCI_ERS_RESULT_DISCONNECT; | |
2256 | } | |
2257 | ||
2258 | /* Perform card reset only on one instance of the card */ | |
2259 | if (0 != PCI_FUNC (pdev->devfn)) | |
2260 | return PCI_ERS_RESULT_RECOVERED; | |
2261 | ||
2262 | pci_set_master(pdev); | |
2263 | ||
2264 | netif_carrier_off(netdev); | |
2265 | netif_stop_queue(netdev); | |
2266 | ixgb_reset(adapter); | |
2267 | ||
2268 | /* Make sure the EEPROM is good */ | |
03f83041 | 2269 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
01748fbb LV |
2270 | DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n"); |
2271 | return PCI_ERS_RESULT_DISCONNECT; | |
2272 | } | |
2273 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
2274 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); | |
2275 | ||
03f83041 | 2276 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
01748fbb LV |
2277 | DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n"); |
2278 | return PCI_ERS_RESULT_DISCONNECT; | |
2279 | } | |
2280 | ||
2281 | return PCI_ERS_RESULT_RECOVERED; | |
2282 | } | |
2283 | ||
2284 | /** | |
2285 | * ixgb_io_resume - called when its OK to resume normal operations | |
2286 | * @pdev pointer to pci device with error | |
2287 | * | |
2288 | * The error recovery driver tells us that its OK to resume | |
2289 | * normal operation. Implementation resembles the second-half | |
2290 | * of the ixgb_probe() routine. | |
2291 | */ | |
0060c072 | 2292 | static void ixgb_io_resume(struct pci_dev *pdev) |
01748fbb LV |
2293 | { |
2294 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2295 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb LV |
2296 | |
2297 | pci_set_master(pdev); | |
2298 | ||
03f83041 JB |
2299 | if (netif_running(netdev)) { |
2300 | if (ixgb_up(adapter)) { | |
01748fbb LV |
2301 | printk ("ixgb: can't bring device back up after reset\n"); |
2302 | return; | |
2303 | } | |
2304 | } | |
2305 | ||
2306 | netif_device_attach(netdev); | |
2307 | mod_timer(&adapter->watchdog_timer, jiffies); | |
2308 | } | |
2309 | ||
1da177e4 | 2310 | /* ixgb_main.c */ |