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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 | ||
d328bc83 JP |
29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
30 | ||
1da177e4 LT |
31 | #include "ixgb.h" |
32 | ||
1da177e4 | 33 | char ixgb_driver_name[] = "ixgb"; |
e9ab1d14 | 34 | static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; |
1da177e4 | 35 | |
1da177e4 | 36 | #define DRIVERNAPI "-NAPI" |
f731a9ef | 37 | #define DRV_VERSION "1.0.135-k2" DRIVERNAPI |
273dc74e | 38 | const char ixgb_driver_version[] = DRV_VERSION; |
f731a9ef | 39 | static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; |
1da177e4 | 40 | |
d9fed18b JB |
41 | #define IXGB_CB_LENGTH 256 |
42 | static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; | |
43 | module_param(copybreak, uint, 0644); | |
44 | MODULE_PARM_DESC(copybreak, | |
45 | "Maximum size of packet that is copied to a new buffer on receive"); | |
46 | ||
1da177e4 LT |
47 | /* ixgb_pci_tbl - PCI Device ID Table |
48 | * | |
49 | * Wildcard entries (PCI_ANY_ID) should come last | |
50 | * Last entry must be all 0s | |
51 | * | |
52 | * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, | |
53 | * Class, Class Mask, private data (not used) } | |
54 | */ | |
a3aa1884 | 55 | static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = { |
1da177e4 LT |
56 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, |
57 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
940829e2 AK |
58 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4, |
59 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
1da177e4 LT |
60 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, |
61 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
7490d71a | 62 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, |
1da177e4 LT |
63 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
64 | ||
65 | /* required last entry */ | |
66 | {0,} | |
67 | }; | |
68 | ||
69 | MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); | |
70 | ||
71 | /* Local Function Prototypes */ | |
1da177e4 LT |
72 | static int ixgb_init_module(void); |
73 | static void ixgb_exit_module(void); | |
74 | static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); | |
75 | static void __devexit ixgb_remove(struct pci_dev *pdev); | |
76 | static int ixgb_sw_init(struct ixgb_adapter *adapter); | |
77 | static int ixgb_open(struct net_device *netdev); | |
78 | static int ixgb_close(struct net_device *netdev); | |
79 | static void ixgb_configure_tx(struct ixgb_adapter *adapter); | |
80 | static void ixgb_configure_rx(struct ixgb_adapter *adapter); | |
81 | static void ixgb_setup_rctl(struct ixgb_adapter *adapter); | |
82 | static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); | |
83 | static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); | |
84 | static void ixgb_set_multi(struct net_device *netdev); | |
85 | static void ixgb_watchdog(unsigned long data); | |
3b29a56d SH |
86 | static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb, |
87 | struct net_device *netdev); | |
1da177e4 LT |
88 | static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); |
89 | static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); | |
90 | static int ixgb_set_mac(struct net_device *netdev, void *p); | |
7d12e780 | 91 | static irqreturn_t ixgb_intr(int irq, void *data); |
446490ca | 92 | static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); |
ac79c82e | 93 | |
7490d71a JB |
94 | static int ixgb_clean(struct napi_struct *, int); |
95 | static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); | |
fc2d14e3 | 96 | static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); |
7490d71a | 97 | |
1da177e4 | 98 | static void ixgb_tx_timeout(struct net_device *dev); |
c4028958 | 99 | static void ixgb_tx_timeout_task(struct work_struct *work); |
7490d71a | 100 | |
1da177e4 | 101 | static void ixgb_vlan_rx_register(struct net_device *netdev, |
7490d71a | 102 | struct vlan_group *grp); |
222441a6 JP |
103 | static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
104 | static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); | |
1da177e4 LT |
105 | static void ixgb_restore_vlan(struct ixgb_adapter *adapter); |
106 | ||
1da177e4 LT |
107 | #ifdef CONFIG_NET_POLL_CONTROLLER |
108 | /* for netdump / net console */ | |
109 | static void ixgb_netpoll(struct net_device *dev); | |
110 | #endif | |
111 | ||
01748fbb | 112 | static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, |
7490d71a | 113 | enum pci_channel_state state); |
01748fbb LV |
114 | static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); |
115 | static void ixgb_io_resume (struct pci_dev *pdev); | |
1da177e4 | 116 | |
01748fbb LV |
117 | static struct pci_error_handlers ixgb_err_handler = { |
118 | .error_detected = ixgb_io_error_detected, | |
119 | .slot_reset = ixgb_io_slot_reset, | |
120 | .resume = ixgb_io_resume, | |
121 | }; | |
122 | ||
1da177e4 | 123 | static struct pci_driver ixgb_driver = { |
c2eba932 | 124 | .name = ixgb_driver_name, |
1da177e4 | 125 | .id_table = ixgb_pci_tbl, |
c2eba932 MC |
126 | .probe = ixgb_probe, |
127 | .remove = __devexit_p(ixgb_remove), | |
01748fbb | 128 | .err_handler = &ixgb_err_handler |
1da177e4 LT |
129 | }; |
130 | ||
131 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); | |
132 | MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); | |
133 | MODULE_LICENSE("GPL"); | |
01e5abc2 | 134 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 135 | |
ec9c3f5d AK |
136 | #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
137 | static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; | |
138 | module_param(debug, int, 0); | |
139 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
140 | ||
1da177e4 LT |
141 | /** |
142 | * ixgb_init_module - Driver Registration Routine | |
143 | * | |
144 | * ixgb_init_module is the first routine called when the driver is | |
145 | * loaded. All it does is register with the PCI subsystem. | |
146 | **/ | |
147 | ||
148 | static int __init | |
149 | ixgb_init_module(void) | |
150 | { | |
d328bc83 JP |
151 | pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version); |
152 | pr_info("%s\n", ixgb_copyright); | |
1da177e4 | 153 | |
29917620 | 154 | return pci_register_driver(&ixgb_driver); |
1da177e4 LT |
155 | } |
156 | ||
157 | module_init(ixgb_init_module); | |
158 | ||
159 | /** | |
160 | * ixgb_exit_module - Driver Exit Cleanup Routine | |
161 | * | |
162 | * ixgb_exit_module is called just before the driver is removed | |
163 | * from memory. | |
164 | **/ | |
165 | ||
166 | static void __exit | |
167 | ixgb_exit_module(void) | |
168 | { | |
1da177e4 LT |
169 | pci_unregister_driver(&ixgb_driver); |
170 | } | |
171 | ||
172 | module_exit(ixgb_exit_module); | |
173 | ||
174 | /** | |
175 | * ixgb_irq_disable - Mask off interrupt generation on the NIC | |
176 | * @adapter: board private structure | |
177 | **/ | |
178 | ||
235949d1 | 179 | static void |
1da177e4 LT |
180 | ixgb_irq_disable(struct ixgb_adapter *adapter) |
181 | { | |
1da177e4 LT |
182 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
183 | IXGB_WRITE_FLUSH(&adapter->hw); | |
184 | synchronize_irq(adapter->pdev->irq); | |
185 | } | |
186 | ||
187 | /** | |
188 | * ixgb_irq_enable - Enable default interrupt generation settings | |
189 | * @adapter: board private structure | |
190 | **/ | |
191 | ||
235949d1 | 192 | static void |
1da177e4 LT |
193 | ixgb_irq_enable(struct ixgb_adapter *adapter) |
194 | { | |
9c61a9dc JB |
195 | u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | |
196 | IXGB_INT_TXDW | IXGB_INT_LSC; | |
197 | if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID) | |
198 | val |= IXGB_INT_GPI0; | |
199 | IXGB_WRITE_REG(&adapter->hw, IMS, val); | |
200 | IXGB_WRITE_FLUSH(&adapter->hw); | |
1da177e4 LT |
201 | } |
202 | ||
203 | int | |
204 | ixgb_up(struct ixgb_adapter *adapter) | |
205 | { | |
206 | struct net_device *netdev = adapter->netdev; | |
fb136c07 | 207 | int err, irq_flags = IRQF_SHARED; |
1da177e4 LT |
208 | int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
209 | struct ixgb_hw *hw = &adapter->hw; | |
210 | ||
211 | /* hardware has been reset, we need to reload some things */ | |
212 | ||
8556f0d1 | 213 | ixgb_rar_set(hw, netdev->dev_addr, 0); |
1da177e4 LT |
214 | ixgb_set_multi(netdev); |
215 | ||
216 | ixgb_restore_vlan(adapter); | |
217 | ||
218 | ixgb_configure_tx(adapter); | |
219 | ixgb_setup_rctl(adapter); | |
220 | ixgb_configure_rx(adapter); | |
fc2d14e3 | 221 | ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); |
1da177e4 | 222 | |
e59d1696 AK |
223 | /* disable interrupts and get the hardware into a known state */ |
224 | IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); | |
225 | ||
fb136c07 AK |
226 | /* only enable MSI if bus is in PCI-X mode */ |
227 | if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { | |
228 | err = pci_enable_msi(adapter->pdev); | |
229 | if (!err) { | |
230 | adapter->have_msi = 1; | |
231 | irq_flags = 0; | |
232 | } | |
1da177e4 LT |
233 | /* proceed to try to request regular interrupt */ |
234 | } | |
1da177e4 | 235 | |
a0607fd3 | 236 | err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags, |
fb136c07 AK |
237 | netdev->name, netdev); |
238 | if (err) { | |
239 | if (adapter->have_msi) | |
240 | pci_disable_msi(adapter->pdev); | |
6909c66d JP |
241 | netif_err(adapter, probe, adapter->netdev, |
242 | "Unable to allocate interrupt Error: %d\n", err); | |
1da177e4 | 243 | return err; |
ec9c3f5d | 244 | } |
1da177e4 | 245 | |
03f83041 | 246 | if ((hw->max_frame_size != max_frame) || |
1da177e4 LT |
247 | (hw->max_frame_size != |
248 | (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { | |
249 | ||
250 | hw->max_frame_size = max_frame; | |
251 | ||
252 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
253 | ||
03f83041 | 254 | if (hw->max_frame_size > |
1da177e4 | 255 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
222441a6 | 256 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
1da177e4 | 257 | |
03f83041 | 258 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
1da177e4 LT |
259 | ctrl0 |= IXGB_CTRL0_JFE; |
260 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
261 | } | |
262 | } | |
263 | } | |
264 | ||
bab2bce7 | 265 | clear_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 | 266 | |
bea3348e | 267 | napi_enable(&adapter->napi); |
e59d1696 AK |
268 | ixgb_irq_enable(adapter); |
269 | ||
4cb9be7a JB |
270 | netif_wake_queue(netdev); |
271 | ||
bab2bce7 JB |
272 | mod_timer(&adapter->watchdog_timer, jiffies); |
273 | ||
1da177e4 LT |
274 | return 0; |
275 | } | |
276 | ||
277 | void | |
446490ca | 278 | ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) |
1da177e4 LT |
279 | { |
280 | struct net_device *netdev = adapter->netdev; | |
281 | ||
bab2bce7 JB |
282 | /* prevent the interrupt handler from restarting watchdog */ |
283 | set_bit(__IXGB_DOWN, &adapter->flags); | |
284 | ||
49d85c50 | 285 | napi_disable(&adapter->napi); |
bab2bce7 | 286 | /* waiting for NAPI to complete can re-enable interrupts */ |
1da177e4 LT |
287 | ixgb_irq_disable(adapter); |
288 | free_irq(adapter->pdev->irq, netdev); | |
fb136c07 AK |
289 | |
290 | if (adapter->have_msi) | |
1da177e4 LT |
291 | pci_disable_msi(adapter->pdev); |
292 | ||
03f83041 | 293 | if (kill_watchdog) |
1da177e4 | 294 | del_timer_sync(&adapter->watchdog_timer); |
49d85c50 | 295 | |
1da177e4 LT |
296 | adapter->link_speed = 0; |
297 | adapter->link_duplex = 0; | |
298 | netif_carrier_off(netdev); | |
299 | netif_stop_queue(netdev); | |
300 | ||
301 | ixgb_reset(adapter); | |
302 | ixgb_clean_tx_ring(adapter); | |
303 | ixgb_clean_rx_ring(adapter); | |
304 | } | |
305 | ||
306 | void | |
307 | ixgb_reset(struct ixgb_adapter *adapter) | |
308 | { | |
3fd7131f | 309 | struct ixgb_hw *hw = &adapter->hw; |
1da177e4 | 310 | |
3fd7131f MW |
311 | ixgb_adapter_stop(hw); |
312 | if (!ixgb_init_hw(hw)) | |
6909c66d | 313 | netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n"); |
3fd7131f MW |
314 | |
315 | /* restore frame size information */ | |
316 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
317 | if (hw->max_frame_size > | |
318 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { | |
319 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); | |
320 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { | |
321 | ctrl0 |= IXGB_CTRL0_JFE; | |
322 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
323 | } | |
324 | } | |
1da177e4 LT |
325 | } |
326 | ||
0edc3527 SH |
327 | static const struct net_device_ops ixgb_netdev_ops = { |
328 | .ndo_open = ixgb_open, | |
329 | .ndo_stop = ixgb_close, | |
00829823 | 330 | .ndo_start_xmit = ixgb_xmit_frame, |
0edc3527 SH |
331 | .ndo_get_stats = ixgb_get_stats, |
332 | .ndo_set_multicast_list = ixgb_set_multi, | |
333 | .ndo_validate_addr = eth_validate_addr, | |
334 | .ndo_set_mac_address = ixgb_set_mac, | |
335 | .ndo_change_mtu = ixgb_change_mtu, | |
336 | .ndo_tx_timeout = ixgb_tx_timeout, | |
337 | .ndo_vlan_rx_register = ixgb_vlan_rx_register, | |
338 | .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, | |
339 | .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, | |
340 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
341 | .ndo_poll_controller = ixgb_netpoll, | |
342 | #endif | |
343 | }; | |
344 | ||
1da177e4 LT |
345 | /** |
346 | * ixgb_probe - Device Initialization Routine | |
347 | * @pdev: PCI device information struct | |
348 | * @ent: entry in ixgb_pci_tbl | |
349 | * | |
350 | * Returns 0 on success, negative on failure | |
351 | * | |
352 | * ixgb_probe initializes an adapter identified by a pci_dev structure. | |
353 | * The OS initialization, configuring of the adapter private structure, | |
354 | * and a hardware reset occur. | |
355 | **/ | |
356 | ||
357 | static int __devinit | |
0060c072 | 358 | ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
359 | { |
360 | struct net_device *netdev = NULL; | |
361 | struct ixgb_adapter *adapter; | |
362 | static int cards_found = 0; | |
1da177e4 LT |
363 | int pci_using_dac; |
364 | int i; | |
365 | int err; | |
366 | ||
9e7bd330 JB |
367 | err = pci_enable_device(pdev); |
368 | if (err) | |
1da177e4 LT |
369 | return err; |
370 | ||
47631f85 NN |
371 | pci_using_dac = 0; |
372 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); | |
373 | if (!err) { | |
374 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); | |
375 | if (!err) | |
376 | pci_using_dac = 1; | |
1da177e4 | 377 | } else { |
47631f85 NN |
378 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
379 | if (err) { | |
380 | err = dma_set_coherent_mask(&pdev->dev, | |
381 | DMA_BIT_MASK(32)); | |
382 | if (err) { | |
383 | pr_err("No usable DMA configuration, aborting\n"); | |
384 | goto err_dma_mask; | |
385 | } | |
1da177e4 | 386 | } |
1da177e4 LT |
387 | } |
388 | ||
9e7bd330 JB |
389 | err = pci_request_regions(pdev, ixgb_driver_name); |
390 | if (err) | |
c91e468a | 391 | goto err_request_regions; |
1da177e4 LT |
392 | |
393 | pci_set_master(pdev); | |
394 | ||
395 | netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); | |
03f83041 | 396 | if (!netdev) { |
1da177e4 LT |
397 | err = -ENOMEM; |
398 | goto err_alloc_etherdev; | |
399 | } | |
400 | ||
1da177e4 LT |
401 | SET_NETDEV_DEV(netdev, &pdev->dev); |
402 | ||
403 | pci_set_drvdata(pdev, netdev); | |
8908c6cd | 404 | adapter = netdev_priv(netdev); |
1da177e4 LT |
405 | adapter->netdev = netdev; |
406 | adapter->pdev = pdev; | |
407 | adapter->hw.back = adapter; | |
ec9c3f5d | 408 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); |
1da177e4 | 409 | |
275f165f | 410 | adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); |
e539e466 | 411 | if (!adapter->hw.hw_addr) { |
1da177e4 LT |
412 | err = -EIO; |
413 | goto err_ioremap; | |
414 | } | |
415 | ||
1459336d | 416 | for (i = BAR_1; i <= BAR_5; i++) { |
03f83041 | 417 | if (pci_resource_len(pdev, i) == 0) |
1da177e4 | 418 | continue; |
03f83041 | 419 | if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
1da177e4 LT |
420 | adapter->hw.io_base = pci_resource_start(pdev, i); |
421 | break; | |
422 | } | |
423 | } | |
424 | ||
0edc3527 | 425 | netdev->netdev_ops = &ixgb_netdev_ops; |
1da177e4 | 426 | ixgb_set_ethtool_ops(netdev); |
9b8118df | 427 | netdev->watchdog_timeo = 5 * HZ; |
bea3348e | 428 | netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); |
1da177e4 | 429 | |
0eb5a34c | 430 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
1da177e4 LT |
431 | |
432 | adapter->bd_number = cards_found; | |
433 | adapter->link_speed = 0; | |
434 | adapter->link_duplex = 0; | |
435 | ||
436 | /* setup the private structure */ | |
437 | ||
9e7bd330 JB |
438 | err = ixgb_sw_init(adapter); |
439 | if (err) | |
1da177e4 LT |
440 | goto err_sw_init; |
441 | ||
442 | netdev->features = NETIF_F_SG | | |
443 | NETIF_F_HW_CSUM | | |
444 | NETIF_F_HW_VLAN_TX | | |
445 | NETIF_F_HW_VLAN_RX | | |
446 | NETIF_F_HW_VLAN_FILTER; | |
1da177e4 | 447 | netdev->features |= NETIF_F_TSO; |
1da177e4 | 448 | |
03f83041 | 449 | if (pci_using_dac) |
1da177e4 LT |
450 | netdev->features |= NETIF_F_HIGHDMA; |
451 | ||
452 | /* make sure the EEPROM is good */ | |
453 | ||
03f83041 | 454 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
6909c66d JP |
455 | netif_err(adapter, probe, adapter->netdev, |
456 | "The EEPROM Checksum Is Not Valid\n"); | |
1da177e4 LT |
457 | err = -EIO; |
458 | goto err_eeprom; | |
459 | } | |
460 | ||
461 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
df859c51 | 462 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
1da177e4 | 463 | |
03f83041 | 464 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
6909c66d | 465 | netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n"); |
1da177e4 LT |
466 | err = -EIO; |
467 | goto err_eeprom; | |
468 | } | |
469 | ||
470 | adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); | |
471 | ||
472 | init_timer(&adapter->watchdog_timer); | |
473 | adapter->watchdog_timer.function = &ixgb_watchdog; | |
474 | adapter->watchdog_timer.data = (unsigned long)adapter; | |
475 | ||
c4028958 | 476 | INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); |
1da177e4 | 477 | |
ec9c3f5d | 478 | strcpy(netdev->name, "eth%d"); |
9e7bd330 JB |
479 | err = register_netdev(netdev); |
480 | if (err) | |
1da177e4 LT |
481 | goto err_register; |
482 | ||
3a6d1bc4 | 483 | /* carrier off reporting is important to ethtool even BEFORE open */ |
1da177e4 | 484 | netif_carrier_off(netdev); |
1da177e4 | 485 | |
6909c66d JP |
486 | netif_info(adapter, probe, adapter->netdev, |
487 | "Intel(R) PRO/10GbE Network Connection\n"); | |
1da177e4 LT |
488 | ixgb_check_options(adapter); |
489 | /* reset the hardware with the new settings */ | |
490 | ||
491 | ixgb_reset(adapter); | |
492 | ||
493 | cards_found++; | |
494 | return 0; | |
495 | ||
496 | err_register: | |
497 | err_sw_init: | |
498 | err_eeprom: | |
499 | iounmap(adapter->hw.hw_addr); | |
500 | err_ioremap: | |
501 | free_netdev(netdev); | |
502 | err_alloc_etherdev: | |
503 | pci_release_regions(pdev); | |
c91e468a AS |
504 | err_request_regions: |
505 | err_dma_mask: | |
506 | pci_disable_device(pdev); | |
1da177e4 LT |
507 | return err; |
508 | } | |
509 | ||
510 | /** | |
511 | * ixgb_remove - Device Removal Routine | |
512 | * @pdev: PCI device information struct | |
513 | * | |
514 | * ixgb_remove is called by the PCI subsystem to alert the driver | |
515 | * that it should release a PCI device. The could be caused by a | |
516 | * Hot-Plug event, or because the driver is going to be removed from | |
517 | * memory. | |
518 | **/ | |
519 | ||
520 | static void __devexit | |
521 | ixgb_remove(struct pci_dev *pdev) | |
522 | { | |
523 | struct net_device *netdev = pci_get_drvdata(pdev); | |
8908c6cd | 524 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 525 | |
12579697 JB |
526 | flush_scheduled_work(); |
527 | ||
1da177e4 LT |
528 | unregister_netdev(netdev); |
529 | ||
530 | iounmap(adapter->hw.hw_addr); | |
531 | pci_release_regions(pdev); | |
532 | ||
533 | free_netdev(netdev); | |
534 | } | |
535 | ||
536 | /** | |
537 | * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) | |
538 | * @adapter: board private structure to initialize | |
539 | * | |
540 | * ixgb_sw_init initializes the Adapter private data structure. | |
541 | * Fields are initialized based on PCI device information and | |
542 | * OS network device settings (MTU size). | |
543 | **/ | |
544 | ||
545 | static int __devinit | |
546 | ixgb_sw_init(struct ixgb_adapter *adapter) | |
547 | { | |
548 | struct ixgb_hw *hw = &adapter->hw; | |
549 | struct net_device *netdev = adapter->netdev; | |
550 | struct pci_dev *pdev = adapter->pdev; | |
551 | ||
552 | /* PCI config space info */ | |
553 | ||
554 | hw->vendor_id = pdev->vendor; | |
555 | hw->device_id = pdev->device; | |
556 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
557 | hw->subsystem_id = pdev->subsystem_device; | |
558 | ||
1da177e4 | 559 | hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
a3dc3da0 | 560 | adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ |
1da177e4 | 561 | |
6909c66d JP |
562 | if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || |
563 | (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || | |
564 | (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || | |
565 | (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) | |
0060c072 | 566 | hw->mac_type = ixgb_82597; |
1da177e4 LT |
567 | else { |
568 | /* should never have loaded on this device */ | |
6909c66d | 569 | netif_err(adapter, probe, adapter->netdev, "unsupported device id\n"); |
1da177e4 LT |
570 | } |
571 | ||
572 | /* enable flow control to be programmed */ | |
573 | hw->fc.send_xon = 1; | |
574 | ||
bab2bce7 | 575 | set_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 LT |
576 | return 0; |
577 | } | |
578 | ||
579 | /** | |
580 | * ixgb_open - Called when a network interface is made active | |
581 | * @netdev: network interface device structure | |
582 | * | |
583 | * Returns 0 on success, negative value on failure | |
584 | * | |
585 | * The open entry point is called when a network interface is made | |
586 | * active by the system (IFF_UP). At this point all resources needed | |
587 | * for transmit and receive operations are allocated, the interrupt | |
588 | * handler is registered with the OS, the watchdog timer is started, | |
589 | * and the stack is notified that the interface is ready. | |
590 | **/ | |
591 | ||
592 | static int | |
593 | ixgb_open(struct net_device *netdev) | |
594 | { | |
8908c6cd | 595 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
596 | int err; |
597 | ||
598 | /* allocate transmit descriptors */ | |
9e7bd330 JB |
599 | err = ixgb_setup_tx_resources(adapter); |
600 | if (err) | |
1da177e4 LT |
601 | goto err_setup_tx; |
602 | ||
3a6d1bc4 JB |
603 | netif_carrier_off(netdev); |
604 | ||
1da177e4 LT |
605 | /* allocate receive descriptors */ |
606 | ||
9e7bd330 JB |
607 | err = ixgb_setup_rx_resources(adapter); |
608 | if (err) | |
1da177e4 LT |
609 | goto err_setup_rx; |
610 | ||
9e7bd330 JB |
611 | err = ixgb_up(adapter); |
612 | if (err) | |
1da177e4 LT |
613 | goto err_up; |
614 | ||
3a6d1bc4 JB |
615 | netif_start_queue(netdev); |
616 | ||
1da177e4 LT |
617 | return 0; |
618 | ||
619 | err_up: | |
620 | ixgb_free_rx_resources(adapter); | |
621 | err_setup_rx: | |
622 | ixgb_free_tx_resources(adapter); | |
623 | err_setup_tx: | |
624 | ixgb_reset(adapter); | |
625 | ||
626 | return err; | |
627 | } | |
628 | ||
629 | /** | |
630 | * ixgb_close - Disables a network interface | |
631 | * @netdev: network interface device structure | |
632 | * | |
633 | * Returns 0, this is not allowed to fail | |
634 | * | |
635 | * The close entry point is called when an interface is de-activated | |
636 | * by the OS. The hardware is still under the drivers control, but | |
637 | * needs to be disabled. A global MAC reset is issued to stop the | |
638 | * hardware, and all transmit and receive resources are freed. | |
639 | **/ | |
640 | ||
641 | static int | |
642 | ixgb_close(struct net_device *netdev) | |
643 | { | |
8908c6cd | 644 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 645 | |
446490ca | 646 | ixgb_down(adapter, true); |
1da177e4 LT |
647 | |
648 | ixgb_free_tx_resources(adapter); | |
649 | ixgb_free_rx_resources(adapter); | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | /** | |
655 | * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) | |
656 | * @adapter: board private structure | |
657 | * | |
658 | * Return 0 on success, negative on failure | |
659 | **/ | |
660 | ||
661 | int | |
662 | ixgb_setup_tx_resources(struct ixgb_adapter *adapter) | |
663 | { | |
664 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
665 | struct pci_dev *pdev = adapter->pdev; | |
666 | int size; | |
667 | ||
668 | size = sizeof(struct ixgb_buffer) * txdr->count; | |
669 | txdr->buffer_info = vmalloc(size); | |
03f83041 | 670 | if (!txdr->buffer_info) { |
6909c66d JP |
671 | netif_err(adapter, probe, adapter->netdev, |
672 | "Unable to allocate transmit descriptor ring memory\n"); | |
1da177e4 LT |
673 | return -ENOMEM; |
674 | } | |
675 | memset(txdr->buffer_info, 0, size); | |
676 | ||
677 | /* round up to nearest 4K */ | |
678 | ||
679 | txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); | |
55e924cf | 680 | txdr->size = ALIGN(txdr->size, 4096); |
1da177e4 | 681 | |
47631f85 NN |
682 | txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
683 | GFP_KERNEL); | |
03f83041 | 684 | if (!txdr->desc) { |
1da177e4 | 685 | vfree(txdr->buffer_info); |
6909c66d JP |
686 | netif_err(adapter, probe, adapter->netdev, |
687 | "Unable to allocate transmit descriptor memory\n"); | |
1da177e4 LT |
688 | return -ENOMEM; |
689 | } | |
690 | memset(txdr->desc, 0, txdr->size); | |
691 | ||
692 | txdr->next_to_use = 0; | |
693 | txdr->next_to_clean = 0; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | /** | |
699 | * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. | |
700 | * @adapter: board private structure | |
701 | * | |
702 | * Configure the Tx unit of the MAC after a reset. | |
703 | **/ | |
704 | ||
705 | static void | |
706 | ixgb_configure_tx(struct ixgb_adapter *adapter) | |
707 | { | |
222441a6 JP |
708 | u64 tdba = adapter->tx_ring.dma; |
709 | u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); | |
710 | u32 tctl; | |
1da177e4 LT |
711 | struct ixgb_hw *hw = &adapter->hw; |
712 | ||
0060c072 JB |
713 | /* Setup the Base and Length of the Tx Descriptor Ring |
714 | * tx_ring.dma can be either a 32 or 64 bit value | |
1da177e4 LT |
715 | */ |
716 | ||
717 | IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); | |
718 | IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); | |
719 | ||
720 | IXGB_WRITE_REG(hw, TDLEN, tdlen); | |
721 | ||
722 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
723 | ||
724 | IXGB_WRITE_REG(hw, TDH, 0); | |
725 | IXGB_WRITE_REG(hw, TDT, 0); | |
726 | ||
727 | /* don't set up txdctl, it induces performance problems if configured | |
728 | * incorrectly */ | |
729 | /* Set the Tx Interrupt Delay register */ | |
730 | ||
731 | IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); | |
732 | ||
733 | /* Program the Transmit Control Register */ | |
734 | ||
735 | tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; | |
736 | IXGB_WRITE_REG(hw, TCTL, tctl); | |
737 | ||
738 | /* Setup Transmit Descriptor Settings for this adapter */ | |
739 | adapter->tx_cmd_type = | |
0060c072 JB |
740 | IXGB_TX_DESC_TYPE | |
741 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); | |
1da177e4 LT |
742 | } |
743 | ||
744 | /** | |
745 | * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) | |
746 | * @adapter: board private structure | |
747 | * | |
748 | * Returns 0 on success, negative on failure | |
749 | **/ | |
750 | ||
751 | int | |
752 | ixgb_setup_rx_resources(struct ixgb_adapter *adapter) | |
753 | { | |
754 | struct ixgb_desc_ring *rxdr = &adapter->rx_ring; | |
755 | struct pci_dev *pdev = adapter->pdev; | |
756 | int size; | |
757 | ||
758 | size = sizeof(struct ixgb_buffer) * rxdr->count; | |
759 | rxdr->buffer_info = vmalloc(size); | |
03f83041 | 760 | if (!rxdr->buffer_info) { |
6909c66d JP |
761 | netif_err(adapter, probe, adapter->netdev, |
762 | "Unable to allocate receive descriptor ring\n"); | |
1da177e4 LT |
763 | return -ENOMEM; |
764 | } | |
765 | memset(rxdr->buffer_info, 0, size); | |
766 | ||
767 | /* Round up to nearest 4K */ | |
768 | ||
769 | rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); | |
55e924cf | 770 | rxdr->size = ALIGN(rxdr->size, 4096); |
1da177e4 | 771 | |
47631f85 NN |
772 | rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
773 | GFP_KERNEL); | |
1da177e4 | 774 | |
03f83041 | 775 | if (!rxdr->desc) { |
1da177e4 | 776 | vfree(rxdr->buffer_info); |
6909c66d JP |
777 | netif_err(adapter, probe, adapter->netdev, |
778 | "Unable to allocate receive descriptors\n"); | |
1da177e4 LT |
779 | return -ENOMEM; |
780 | } | |
781 | memset(rxdr->desc, 0, rxdr->size); | |
782 | ||
783 | rxdr->next_to_clean = 0; | |
784 | rxdr->next_to_use = 0; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | /** | |
790 | * ixgb_setup_rctl - configure the receive control register | |
791 | * @adapter: Board private structure | |
792 | **/ | |
793 | ||
794 | static void | |
795 | ixgb_setup_rctl(struct ixgb_adapter *adapter) | |
796 | { | |
222441a6 | 797 | u32 rctl; |
1da177e4 LT |
798 | |
799 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
800 | ||
801 | rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); | |
802 | ||
803 | rctl |= | |
0060c072 JB |
804 | IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | |
805 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | | |
1da177e4 LT |
806 | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); |
807 | ||
808 | rctl |= IXGB_RCTL_SECRC; | |
809 | ||
3f3dc0dd | 810 | if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
1da177e4 | 811 | rctl |= IXGB_RCTL_BSIZE_2048; |
3f3dc0dd | 812 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
1da177e4 | 813 | rctl |= IXGB_RCTL_BSIZE_4096; |
3f3dc0dd | 814 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
1da177e4 | 815 | rctl |= IXGB_RCTL_BSIZE_8192; |
3f3dc0dd | 816 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
1da177e4 | 817 | rctl |= IXGB_RCTL_BSIZE_16384; |
1da177e4 LT |
818 | |
819 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
820 | } | |
821 | ||
822 | /** | |
823 | * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. | |
824 | * @adapter: board private structure | |
825 | * | |
826 | * Configure the Rx unit of the MAC after a reset. | |
827 | **/ | |
828 | ||
829 | static void | |
830 | ixgb_configure_rx(struct ixgb_adapter *adapter) | |
831 | { | |
222441a6 JP |
832 | u64 rdba = adapter->rx_ring.dma; |
833 | u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); | |
1da177e4 | 834 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 JP |
835 | u32 rctl; |
836 | u32 rxcsum; | |
1da177e4 LT |
837 | |
838 | /* make sure receives are disabled while setting up the descriptors */ | |
839 | ||
840 | rctl = IXGB_READ_REG(hw, RCTL); | |
841 | IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); | |
842 | ||
843 | /* set the Receive Delay Timer Register */ | |
844 | ||
845 | IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); | |
846 | ||
847 | /* Setup the Base and Length of the Rx Descriptor Ring */ | |
848 | ||
849 | IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); | |
850 | IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); | |
851 | ||
852 | IXGB_WRITE_REG(hw, RDLEN, rdlen); | |
853 | ||
854 | /* Setup the HW Rx Head and Tail Descriptor Pointers */ | |
855 | IXGB_WRITE_REG(hw, RDH, 0); | |
856 | IXGB_WRITE_REG(hw, RDT, 0); | |
857 | ||
4360386f JB |
858 | /* due to the hardware errata with RXDCTL, we are unable to use any of |
859 | * the performance enhancing features of it without causing other | |
860 | * subtle bugs, some of the bugs could include receive length | |
861 | * corruption at high data rates (WTHRESH > 0) and/or receive | |
862 | * descriptor ring irregularites (particularly in hardware cache) */ | |
863 | IXGB_WRITE_REG(hw, RXDCTL, 0); | |
1da177e4 LT |
864 | |
865 | /* Enable Receive Checksum Offload for TCP and UDP */ | |
446490ca | 866 | if (adapter->rx_csum) { |
1da177e4 LT |
867 | rxcsum = IXGB_READ_REG(hw, RXCSUM); |
868 | rxcsum |= IXGB_RXCSUM_TUOFL; | |
869 | IXGB_WRITE_REG(hw, RXCSUM, rxcsum); | |
870 | } | |
871 | ||
872 | /* Enable Receives */ | |
873 | ||
874 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
875 | } | |
876 | ||
877 | /** | |
878 | * ixgb_free_tx_resources - Free Tx Resources | |
879 | * @adapter: board private structure | |
880 | * | |
881 | * Free all transmit software resources | |
882 | **/ | |
883 | ||
884 | void | |
885 | ixgb_free_tx_resources(struct ixgb_adapter *adapter) | |
886 | { | |
887 | struct pci_dev *pdev = adapter->pdev; | |
888 | ||
889 | ixgb_clean_tx_ring(adapter); | |
890 | ||
891 | vfree(adapter->tx_ring.buffer_info); | |
892 | adapter->tx_ring.buffer_info = NULL; | |
893 | ||
47631f85 NN |
894 | dma_free_coherent(&pdev->dev, adapter->tx_ring.size, |
895 | adapter->tx_ring.desc, adapter->tx_ring.dma); | |
1da177e4 LT |
896 | |
897 | adapter->tx_ring.desc = NULL; | |
898 | } | |
899 | ||
235949d1 | 900 | static void |
1da177e4 | 901 | ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, |
0060c072 | 902 | struct ixgb_buffer *buffer_info) |
1da177e4 | 903 | { |
adeaa908 AD |
904 | if (buffer_info->dma) { |
905 | if (buffer_info->mapped_as_page) | |
47631f85 NN |
906 | dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
907 | buffer_info->length, DMA_TO_DEVICE); | |
adeaa908 | 908 | else |
47631f85 NN |
909 | dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
910 | buffer_info->length, DMA_TO_DEVICE); | |
adeaa908 AD |
911 | buffer_info->dma = 0; |
912 | } | |
913 | ||
fe52eeb8 | 914 | if (buffer_info->skb) { |
fe52eeb8 AD |
915 | dev_kfree_skb_any(buffer_info->skb); |
916 | buffer_info->skb = NULL; | |
917 | } | |
1dfdd7df AK |
918 | buffer_info->time_stamp = 0; |
919 | /* these fields must always be initialized in tx | |
920 | * buffer_info->length = 0; | |
921 | * buffer_info->next_to_watch = 0; */ | |
1da177e4 LT |
922 | } |
923 | ||
924 | /** | |
925 | * ixgb_clean_tx_ring - Free Tx Buffers | |
926 | * @adapter: board private structure | |
927 | **/ | |
928 | ||
929 | static void | |
930 | ixgb_clean_tx_ring(struct ixgb_adapter *adapter) | |
931 | { | |
932 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
933 | struct ixgb_buffer *buffer_info; | |
934 | unsigned long size; | |
935 | unsigned int i; | |
936 | ||
937 | /* Free all the Tx ring sk_buffs */ | |
938 | ||
1459336d | 939 | for (i = 0; i < tx_ring->count; i++) { |
1da177e4 LT |
940 | buffer_info = &tx_ring->buffer_info[i]; |
941 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
942 | } | |
943 | ||
944 | size = sizeof(struct ixgb_buffer) * tx_ring->count; | |
945 | memset(tx_ring->buffer_info, 0, size); | |
946 | ||
947 | /* Zero out the descriptor ring */ | |
948 | ||
949 | memset(tx_ring->desc, 0, tx_ring->size); | |
950 | ||
951 | tx_ring->next_to_use = 0; | |
952 | tx_ring->next_to_clean = 0; | |
953 | ||
954 | IXGB_WRITE_REG(&adapter->hw, TDH, 0); | |
955 | IXGB_WRITE_REG(&adapter->hw, TDT, 0); | |
956 | } | |
957 | ||
958 | /** | |
959 | * ixgb_free_rx_resources - Free Rx Resources | |
960 | * @adapter: board private structure | |
961 | * | |
962 | * Free all receive software resources | |
963 | **/ | |
964 | ||
965 | void | |
966 | ixgb_free_rx_resources(struct ixgb_adapter *adapter) | |
967 | { | |
968 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
969 | struct pci_dev *pdev = adapter->pdev; | |
970 | ||
971 | ixgb_clean_rx_ring(adapter); | |
972 | ||
973 | vfree(rx_ring->buffer_info); | |
974 | rx_ring->buffer_info = NULL; | |
975 | ||
47631f85 NN |
976 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
977 | rx_ring->dma); | |
1da177e4 LT |
978 | |
979 | rx_ring->desc = NULL; | |
980 | } | |
981 | ||
982 | /** | |
983 | * ixgb_clean_rx_ring - Free Rx Buffers | |
984 | * @adapter: board private structure | |
985 | **/ | |
986 | ||
987 | static void | |
988 | ixgb_clean_rx_ring(struct ixgb_adapter *adapter) | |
989 | { | |
990 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
991 | struct ixgb_buffer *buffer_info; | |
992 | struct pci_dev *pdev = adapter->pdev; | |
993 | unsigned long size; | |
994 | unsigned int i; | |
995 | ||
996 | /* Free all the Rx ring sk_buffs */ | |
997 | ||
1459336d | 998 | for (i = 0; i < rx_ring->count; i++) { |
1da177e4 | 999 | buffer_info = &rx_ring->buffer_info[i]; |
23e55a32 | 1000 | if (buffer_info->dma) { |
47631f85 | 1001 | dma_unmap_single(&pdev->dev, |
1da177e4 LT |
1002 | buffer_info->dma, |
1003 | buffer_info->length, | |
47631f85 | 1004 | DMA_FROM_DEVICE); |
23e55a32 BJ |
1005 | buffer_info->dma = 0; |
1006 | buffer_info->length = 0; | |
1007 | } | |
1da177e4 | 1008 | |
23e55a32 | 1009 | if (buffer_info->skb) { |
1da177e4 | 1010 | dev_kfree_skb(buffer_info->skb); |
1da177e4 LT |
1011 | buffer_info->skb = NULL; |
1012 | } | |
1013 | } | |
1014 | ||
1015 | size = sizeof(struct ixgb_buffer) * rx_ring->count; | |
1016 | memset(rx_ring->buffer_info, 0, size); | |
1017 | ||
1018 | /* Zero out the descriptor ring */ | |
1019 | ||
1020 | memset(rx_ring->desc, 0, rx_ring->size); | |
1021 | ||
1022 | rx_ring->next_to_clean = 0; | |
1023 | rx_ring->next_to_use = 0; | |
1024 | ||
1025 | IXGB_WRITE_REG(&adapter->hw, RDH, 0); | |
1026 | IXGB_WRITE_REG(&adapter->hw, RDT, 0); | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * ixgb_set_mac - Change the Ethernet Address of the NIC | |
1031 | * @netdev: network interface device structure | |
1032 | * @p: pointer to an address structure | |
1033 | * | |
1034 | * Returns 0 on success, negative on failure | |
1035 | **/ | |
1036 | ||
1037 | static int | |
1038 | ixgb_set_mac(struct net_device *netdev, void *p) | |
1039 | { | |
8908c6cd | 1040 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1041 | struct sockaddr *addr = p; |
1042 | ||
03f83041 | 1043 | if (!is_valid_ether_addr(addr->sa_data)) |
1da177e4 LT |
1044 | return -EADDRNOTAVAIL; |
1045 | ||
1046 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1047 | ||
1048 | ixgb_rar_set(&adapter->hw, addr->sa_data, 0); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | /** | |
1054 | * ixgb_set_multi - Multicast and Promiscuous mode set | |
1055 | * @netdev: network interface device structure | |
1056 | * | |
1057 | * The set_multi entry point is called whenever the multicast address | |
1058 | * list or the network interface flags are updated. This routine is | |
1059 | * responsible for configuring the hardware for proper multicast, | |
1060 | * promiscuous mode, and all-multi behavior. | |
1061 | **/ | |
1062 | ||
1063 | static void | |
1064 | ixgb_set_multi(struct net_device *netdev) | |
1065 | { | |
8908c6cd | 1066 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1067 | struct ixgb_hw *hw = &adapter->hw; |
22bedad3 | 1068 | struct netdev_hw_addr *ha; |
222441a6 | 1069 | u32 rctl; |
1da177e4 LT |
1070 | int i; |
1071 | ||
1072 | /* Check for Promiscuous and All Multicast modes */ | |
1073 | ||
1074 | rctl = IXGB_READ_REG(hw, RCTL); | |
1075 | ||
03f83041 | 1076 | if (netdev->flags & IFF_PROMISC) { |
1da177e4 | 1077 | rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
746b9f02 | 1078 | rctl &= ~IXGB_RCTL_VFE; |
1da177e4 | 1079 | } else { |
746b9f02 PM |
1080 | if (netdev->flags & IFF_ALLMULTI) { |
1081 | rctl |= IXGB_RCTL_MPE; | |
1082 | rctl &= ~IXGB_RCTL_UPE; | |
1083 | } else { | |
1084 | rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); | |
1085 | } | |
78ed11a5 | 1086 | rctl |= IXGB_RCTL_VFE; |
1da177e4 LT |
1087 | } |
1088 | ||
4cd24eaf | 1089 | if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { |
1da177e4 LT |
1090 | rctl |= IXGB_RCTL_MPE; |
1091 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1092 | } else { | |
222441a6 | 1093 | u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES * |
273dc74e | 1094 | IXGB_ETH_LENGTH_OF_ADDRESS]; |
1da177e4 LT |
1095 | |
1096 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1097 | ||
48e2f183 | 1098 | i = 0; |
22bedad3 | 1099 | netdev_for_each_mc_addr(ha, netdev) |
48e2f183 | 1100 | memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS], |
22bedad3 | 1101 | ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS); |
1da177e4 | 1102 | |
4cd24eaf | 1103 | ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); |
1da177e4 LT |
1104 | } |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * ixgb_watchdog - Timer Call-back | |
1109 | * @data: pointer to netdev cast into an unsigned long | |
1110 | **/ | |
1111 | ||
1112 | static void | |
1113 | ixgb_watchdog(unsigned long data) | |
1114 | { | |
1115 | struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; | |
1116 | struct net_device *netdev = adapter->netdev; | |
1117 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
1118 | ||
1119 | ixgb_check_for_link(&adapter->hw); | |
1120 | ||
1121 | if (ixgb_check_for_bad_link(&adapter->hw)) { | |
1122 | /* force the reset path */ | |
1123 | netif_stop_queue(netdev); | |
1124 | } | |
1125 | ||
03f83041 JB |
1126 | if (adapter->hw.link_up) { |
1127 | if (!netif_carrier_ok(netdev)) { | |
d328bc83 JP |
1128 | netdev_info(netdev, |
1129 | "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n", | |
1130 | (adapter->hw.fc.type == ixgb_fc_full) ? | |
1131 | "RX/TX" : | |
1132 | (adapter->hw.fc.type == ixgb_fc_rx_pause) ? | |
1133 | "RX" : | |
1134 | (adapter->hw.fc.type == ixgb_fc_tx_pause) ? | |
1135 | "TX" : "None"); | |
1da177e4 LT |
1136 | adapter->link_speed = 10000; |
1137 | adapter->link_duplex = FULL_DUPLEX; | |
1138 | netif_carrier_on(netdev); | |
1da177e4 LT |
1139 | } |
1140 | } else { | |
03f83041 | 1141 | if (netif_carrier_ok(netdev)) { |
1da177e4 LT |
1142 | adapter->link_speed = 0; |
1143 | adapter->link_duplex = 0; | |
d328bc83 | 1144 | netdev_info(netdev, "NIC Link is Down\n"); |
1da177e4 | 1145 | netif_carrier_off(netdev); |
1da177e4 LT |
1146 | } |
1147 | } | |
1148 | ||
1149 | ixgb_update_stats(adapter); | |
1150 | ||
03f83041 JB |
1151 | if (!netif_carrier_ok(netdev)) { |
1152 | if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { | |
1da177e4 LT |
1153 | /* We've lost link, so the controller stops DMA, |
1154 | * but we've got queued Tx work that's never going | |
1155 | * to get done, so reset controller to flush Tx. | |
1156 | * (Do the reset outside of interrupt context). */ | |
1157 | schedule_work(&adapter->tx_timeout_task); | |
c2d5ab49 JB |
1158 | /* return immediately since reset is imminent */ |
1159 | return; | |
1da177e4 LT |
1160 | } |
1161 | } | |
1162 | ||
1163 | /* Force detection of hung controller every watchdog period */ | |
446490ca | 1164 | adapter->detect_tx_hung = true; |
1da177e4 LT |
1165 | |
1166 | /* generate an interrupt to force clean up of any stragglers */ | |
1167 | IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); | |
1168 | ||
1169 | /* Reset the timer */ | |
1170 | mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); | |
1171 | } | |
1172 | ||
1173 | #define IXGB_TX_FLAGS_CSUM 0x00000001 | |
1174 | #define IXGB_TX_FLAGS_VLAN 0x00000002 | |
1175 | #define IXGB_TX_FLAGS_TSO 0x00000004 | |
1176 | ||
235949d1 | 1177 | static int |
1da177e4 LT |
1178 | ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1179 | { | |
1da177e4 LT |
1180 | struct ixgb_context_desc *context_desc; |
1181 | unsigned int i; | |
222441a6 JP |
1182 | u8 ipcss, ipcso, tucss, tucso, hdr_len; |
1183 | u16 ipcse, tucse, mss; | |
1da177e4 LT |
1184 | int err; |
1185 | ||
89114afd | 1186 | if (likely(skb_is_gso(skb))) { |
adc54139 | 1187 | struct ixgb_buffer *buffer_info; |
eddc9ec5 ACM |
1188 | struct iphdr *iph; |
1189 | ||
1da177e4 LT |
1190 | if (skb_header_cloned(skb)) { |
1191 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1192 | if (err) | |
1193 | return err; | |
1194 | } | |
1195 | ||
ab6a5bb6 | 1196 | hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
7967168c | 1197 | mss = skb_shinfo(skb)->gso_size; |
eddc9ec5 ACM |
1198 | iph = ip_hdr(skb); |
1199 | iph->tot_len = 0; | |
1200 | iph->check = 0; | |
aa8223c7 ACM |
1201 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
1202 | iph->daddr, 0, | |
1203 | IPPROTO_TCP, 0); | |
bbe735e4 | 1204 | ipcss = skb_network_offset(skb); |
eddc9ec5 | 1205 | ipcso = (void *)&(iph->check) - (void *)skb->data; |
ea2ae17d ACM |
1206 | ipcse = skb_transport_offset(skb) - 1; |
1207 | tucss = skb_transport_offset(skb); | |
aa8223c7 | 1208 | tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
1da177e4 LT |
1209 | tucse = 0; |
1210 | ||
1211 | i = adapter->tx_ring.next_to_use; | |
1212 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1213 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1214 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1215 | |
1216 | context_desc->ipcss = ipcss; | |
1217 | context_desc->ipcso = ipcso; | |
1218 | context_desc->ipcse = cpu_to_le16(ipcse); | |
1219 | context_desc->tucss = tucss; | |
1220 | context_desc->tucso = tucso; | |
1221 | context_desc->tucse = cpu_to_le16(tucse); | |
1222 | context_desc->mss = cpu_to_le16(mss); | |
1223 | context_desc->hdr_len = hdr_len; | |
1224 | context_desc->status = 0; | |
1225 | context_desc->cmd_type_len = cpu_to_le32( | |
0060c072 | 1226 | IXGB_CONTEXT_DESC_TYPE |
1da177e4 LT |
1227 | | IXGB_CONTEXT_DESC_CMD_TSE |
1228 | | IXGB_CONTEXT_DESC_CMD_IP | |
1229 | | IXGB_CONTEXT_DESC_CMD_TCP | |
1da177e4 LT |
1230 | | IXGB_CONTEXT_DESC_CMD_IDE |
1231 | | (skb->len - (hdr_len))); | |
1232 | ||
06c2f9ec | 1233 | |
03f83041 | 1234 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1235 | adapter->tx_ring.next_to_use = i; |
1236 | ||
1237 | return 1; | |
1238 | } | |
1da177e4 LT |
1239 | |
1240 | return 0; | |
1241 | } | |
1242 | ||
446490ca | 1243 | static bool |
1da177e4 LT |
1244 | ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1245 | { | |
1246 | struct ixgb_context_desc *context_desc; | |
1247 | unsigned int i; | |
222441a6 | 1248 | u8 css, cso; |
1da177e4 | 1249 | |
03f83041 | 1250 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
adc54139 | 1251 | struct ixgb_buffer *buffer_info; |
ea2ae17d | 1252 | css = skb_transport_offset(skb); |
ff1dcadb | 1253 | cso = css + skb->csum_offset; |
1da177e4 LT |
1254 | |
1255 | i = adapter->tx_ring.next_to_use; | |
1256 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1257 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1258 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1259 | |
1260 | context_desc->tucss = css; | |
1261 | context_desc->tucso = cso; | |
1262 | context_desc->tucse = 0; | |
1263 | /* zero out any previously existing data in one instruction */ | |
222441a6 | 1264 | *(u32 *)&(context_desc->ipcss) = 0; |
1da177e4 LT |
1265 | context_desc->status = 0; |
1266 | context_desc->hdr_len = 0; | |
1267 | context_desc->mss = 0; | |
1268 | context_desc->cmd_type_len = | |
1269 | cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | |
06c2f9ec | 1270 | | IXGB_TX_DESC_CMD_IDE); |
1da177e4 | 1271 | |
03f83041 | 1272 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1273 | adapter->tx_ring.next_to_use = i; |
1274 | ||
446490ca | 1275 | return true; |
1da177e4 LT |
1276 | } |
1277 | ||
446490ca | 1278 | return false; |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | #define IXGB_MAX_TXD_PWR 14 | |
1282 | #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) | |
1283 | ||
235949d1 | 1284 | static int |
1da177e4 LT |
1285 | ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, |
1286 | unsigned int first) | |
1287 | { | |
1288 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
adeaa908 | 1289 | struct pci_dev *pdev = adapter->pdev; |
1da177e4 | 1290 | struct ixgb_buffer *buffer_info; |
fe52eeb8 | 1291 | int len = skb_headlen(skb); |
1da177e4 | 1292 | unsigned int offset = 0, size, count = 0, i; |
5d927853 | 1293 | unsigned int mss = skb_shinfo(skb)->gso_size; |
1da177e4 LT |
1294 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; |
1295 | unsigned int f; | |
1da177e4 LT |
1296 | |
1297 | i = tx_ring->next_to_use; | |
1298 | ||
9a432992 | 1299 | while (len) { |
1da177e4 | 1300 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1301 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1302 | /* Workaround for premature desc write-backs |
1303 | * in TSO mode. Append 4-byte sentinel desc */ | |
1304 | if (unlikely(mss && !nr_frags && size == len && size > 8)) | |
1305 | size -= 4; | |
1306 | ||
1da177e4 | 1307 | buffer_info->length = size; |
adc54139 | 1308 | WARN_ON(buffer_info->dma != 0); |
34336635 | 1309 | buffer_info->time_stamp = jiffies; |
adeaa908 | 1310 | buffer_info->mapped_as_page = false; |
47631f85 NN |
1311 | buffer_info->dma = dma_map_single(&pdev->dev, |
1312 | skb->data + offset, | |
1313 | size, DMA_TO_DEVICE); | |
1314 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
adeaa908 | 1315 | goto dma_error; |
1dfdd7df | 1316 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1317 | |
1318 | len -= size; | |
1319 | offset += size; | |
1320 | count++; | |
fe52eeb8 AD |
1321 | if (len) { |
1322 | i++; | |
1323 | if (i == tx_ring->count) | |
1324 | i = 0; | |
1325 | } | |
1da177e4 LT |
1326 | } |
1327 | ||
1459336d | 1328 | for (f = 0; f < nr_frags; f++) { |
1da177e4 LT |
1329 | struct skb_frag_struct *frag; |
1330 | ||
1331 | frag = &skb_shinfo(skb)->frags[f]; | |
1332 | len = frag->size; | |
adeaa908 | 1333 | offset = frag->page_offset; |
1da177e4 | 1334 | |
9a432992 | 1335 | while (len) { |
fe52eeb8 AD |
1336 | i++; |
1337 | if (i == tx_ring->count) | |
1338 | i = 0; | |
1339 | ||
1da177e4 | 1340 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1341 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1342 | |
1343 | /* Workaround for premature desc write-backs | |
1344 | * in TSO mode. Append 4-byte sentinel desc */ | |
19abe86d AK |
1345 | if (unlikely(mss && (f == (nr_frags - 1)) |
1346 | && size == len && size > 8)) | |
5d927853 JB |
1347 | size -= 4; |
1348 | ||
1da177e4 | 1349 | buffer_info->length = size; |
34336635 | 1350 | buffer_info->time_stamp = jiffies; |
adeaa908 AD |
1351 | buffer_info->mapped_as_page = true; |
1352 | buffer_info->dma = | |
47631f85 NN |
1353 | dma_map_page(&pdev->dev, frag->page, |
1354 | offset, size, DMA_TO_DEVICE); | |
1355 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
adeaa908 | 1356 | goto dma_error; |
1dfdd7df | 1357 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1358 | |
1359 | len -= size; | |
1360 | offset += size; | |
1361 | count++; | |
1da177e4 LT |
1362 | } |
1363 | } | |
1da177e4 LT |
1364 | tx_ring->buffer_info[i].skb = skb; |
1365 | tx_ring->buffer_info[first].next_to_watch = i; | |
1366 | ||
1367 | return count; | |
adeaa908 AD |
1368 | |
1369 | dma_error: | |
1370 | dev_err(&pdev->dev, "TX DMA map failed\n"); | |
1371 | buffer_info->dma = 0; | |
c1fa347f | 1372 | if (count) |
adeaa908 | 1373 | count--; |
c1fa347f RK |
1374 | |
1375 | while (count--) { | |
1376 | if (i==0) | |
adeaa908 | 1377 | i += tx_ring->count; |
c1fa347f | 1378 | i--; |
adeaa908 AD |
1379 | buffer_info = &tx_ring->buffer_info[i]; |
1380 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1381 | } | |
1382 | ||
1383 | return 0; | |
1da177e4 LT |
1384 | } |
1385 | ||
235949d1 | 1386 | static void |
1da177e4 LT |
1387 | ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) |
1388 | { | |
1389 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1390 | struct ixgb_tx_desc *tx_desc = NULL; | |
1391 | struct ixgb_buffer *buffer_info; | |
222441a6 JP |
1392 | u32 cmd_type_len = adapter->tx_cmd_type; |
1393 | u8 status = 0; | |
1394 | u8 popts = 0; | |
1da177e4 LT |
1395 | unsigned int i; |
1396 | ||
03f83041 | 1397 | if (tx_flags & IXGB_TX_FLAGS_TSO) { |
1da177e4 LT |
1398 | cmd_type_len |= IXGB_TX_DESC_CMD_TSE; |
1399 | popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); | |
1400 | } | |
1401 | ||
03f83041 | 1402 | if (tx_flags & IXGB_TX_FLAGS_CSUM) |
1da177e4 LT |
1403 | popts |= IXGB_TX_DESC_POPTS_TXSM; |
1404 | ||
03f83041 | 1405 | if (tx_flags & IXGB_TX_FLAGS_VLAN) |
1da177e4 | 1406 | cmd_type_len |= IXGB_TX_DESC_CMD_VLE; |
1da177e4 LT |
1407 | |
1408 | i = tx_ring->next_to_use; | |
1409 | ||
9a432992 | 1410 | while (count--) { |
1da177e4 LT |
1411 | buffer_info = &tx_ring->buffer_info[i]; |
1412 | tx_desc = IXGB_TX_DESC(*tx_ring, i); | |
1413 | tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); | |
1414 | tx_desc->cmd_type_len = | |
1415 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
1416 | tx_desc->status = status; | |
1417 | tx_desc->popts = popts; | |
1418 | tx_desc->vlan = cpu_to_le16(vlan_id); | |
1419 | ||
03f83041 | 1420 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1421 | } |
1422 | ||
0060c072 JB |
1423 | tx_desc->cmd_type_len |= |
1424 | cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); | |
1da177e4 LT |
1425 | |
1426 | /* Force memory writes to complete before letting h/w | |
1427 | * know there are new descriptors to fetch. (Only | |
1428 | * applicable for weak-ordered memory model archs, | |
1429 | * such as IA-64). */ | |
1430 | wmb(); | |
1431 | ||
1432 | tx_ring->next_to_use = i; | |
1433 | IXGB_WRITE_REG(&adapter->hw, TDT, i); | |
1434 | } | |
1435 | ||
dfd341e4 JB |
1436 | static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) |
1437 | { | |
1438 | struct ixgb_adapter *adapter = netdev_priv(netdev); | |
1439 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1440 | ||
1441 | netif_stop_queue(netdev); | |
1442 | /* Herbert's original patch had: | |
1443 | * smp_mb__after_netif_stop_queue(); | |
1444 | * but since that doesn't exist yet, just open code it. */ | |
1445 | smp_mb(); | |
1446 | ||
1447 | /* We need to check again in a case another CPU has just | |
1448 | * made room available. */ | |
1449 | if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) | |
1450 | return -EBUSY; | |
1451 | ||
1452 | /* A reprieve! */ | |
1453 | netif_start_queue(netdev); | |
1454 | ++adapter->restart_queue; | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | static int ixgb_maybe_stop_tx(struct net_device *netdev, | |
1459 | struct ixgb_desc_ring *tx_ring, int size) | |
1460 | { | |
1461 | if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) | |
1462 | return 0; | |
1463 | return __ixgb_maybe_stop_tx(netdev, size); | |
1464 | } | |
1465 | ||
1466 | ||
1da177e4 LT |
1467 | /* Tx Descriptors needed, worst case */ |
1468 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ | |
1469 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | |
5d927853 JB |
1470 | #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ |
1471 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ | |
1472 | + 1 /* one more needed for sentinel TSO workaround */ | |
1da177e4 | 1473 | |
3b29a56d | 1474 | static netdev_tx_t |
1da177e4 LT |
1475 | ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
1476 | { | |
8908c6cd | 1477 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1478 | unsigned int first; |
1479 | unsigned int tx_flags = 0; | |
1da177e4 | 1480 | int vlan_id = 0; |
fe52eeb8 | 1481 | int count = 0; |
1da177e4 LT |
1482 | int tso; |
1483 | ||
bab2bce7 JB |
1484 | if (test_bit(__IXGB_DOWN, &adapter->flags)) { |
1485 | dev_kfree_skb(skb); | |
1486 | return NETDEV_TX_OK; | |
1487 | } | |
1488 | ||
03f83041 | 1489 | if (skb->len <= 0) { |
c2199340 | 1490 | dev_kfree_skb(skb); |
6ed10654 | 1491 | return NETDEV_TX_OK; |
1da177e4 LT |
1492 | } |
1493 | ||
dfd341e4 | 1494 | if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
db582944 | 1495 | DESC_NEEDED))) |
f017f14b | 1496 | return NETDEV_TX_BUSY; |
1da177e4 | 1497 | |
03f83041 | 1498 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
1da177e4 LT |
1499 | tx_flags |= IXGB_TX_FLAGS_VLAN; |
1500 | vlan_id = vlan_tx_tag_get(skb); | |
1501 | } | |
1502 | ||
1503 | first = adapter->tx_ring.next_to_use; | |
0060c072 | 1504 | |
1da177e4 LT |
1505 | tso = ixgb_tso(adapter, skb); |
1506 | if (tso < 0) { | |
c2199340 | 1507 | dev_kfree_skb(skb); |
1da177e4 LT |
1508 | return NETDEV_TX_OK; |
1509 | } | |
1510 | ||
96f9c2e2 | 1511 | if (likely(tso)) |
1da177e4 | 1512 | tx_flags |= IXGB_TX_FLAGS_TSO; |
03f83041 | 1513 | else if (ixgb_tx_csum(adapter, skb)) |
1da177e4 LT |
1514 | tx_flags |= IXGB_TX_FLAGS_CSUM; |
1515 | ||
fe52eeb8 | 1516 | count = ixgb_tx_map(adapter, skb, first); |
1da177e4 | 1517 | |
fe52eeb8 AD |
1518 | if (count) { |
1519 | ixgb_tx_queue(adapter, count, vlan_id, tx_flags); | |
fe52eeb8 AD |
1520 | /* Make sure there is space in the ring for the next send. */ |
1521 | ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); | |
1da177e4 | 1522 | |
fe52eeb8 AD |
1523 | } else { |
1524 | dev_kfree_skb_any(skb); | |
1525 | adapter->tx_ring.buffer_info[first].time_stamp = 0; | |
1526 | adapter->tx_ring.next_to_use = first; | |
1527 | } | |
f017f14b | 1528 | |
f017f14b | 1529 | return NETDEV_TX_OK; |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | /** | |
1533 | * ixgb_tx_timeout - Respond to a Tx Hang | |
1534 | * @netdev: network interface device structure | |
1535 | **/ | |
1536 | ||
1537 | static void | |
1538 | ixgb_tx_timeout(struct net_device *netdev) | |
1539 | { | |
8908c6cd | 1540 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1541 | |
1542 | /* Do the reset outside of interrupt context */ | |
1543 | schedule_work(&adapter->tx_timeout_task); | |
1544 | } | |
1545 | ||
1546 | static void | |
c4028958 | 1547 | ixgb_tx_timeout_task(struct work_struct *work) |
1da177e4 | 1548 | { |
c4028958 DH |
1549 | struct ixgb_adapter *adapter = |
1550 | container_of(work, struct ixgb_adapter, tx_timeout_task); | |
1da177e4 | 1551 | |
9b8118df | 1552 | adapter->tx_timeout_count++; |
446490ca | 1553 | ixgb_down(adapter, true); |
1da177e4 LT |
1554 | ixgb_up(adapter); |
1555 | } | |
1556 | ||
1557 | /** | |
1558 | * ixgb_get_stats - Get System Network Statistics | |
1559 | * @netdev: network interface device structure | |
1560 | * | |
1561 | * Returns the address of the device statistics structure. | |
1562 | * The statistics are actually updated from the timer callback. | |
1563 | **/ | |
1564 | ||
1565 | static struct net_device_stats * | |
1566 | ixgb_get_stats(struct net_device *netdev) | |
1567 | { | |
0cdc0369 | 1568 | return &netdev->stats; |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | /** | |
1572 | * ixgb_change_mtu - Change the Maximum Transfer Unit | |
1573 | * @netdev: network interface device structure | |
1574 | * @new_mtu: new value for maximum frame size | |
1575 | * | |
1576 | * Returns 0 on success, negative on failure | |
1577 | **/ | |
1578 | ||
1579 | static int | |
1580 | ixgb_change_mtu(struct net_device *netdev, int new_mtu) | |
1581 | { | |
8908c6cd | 1582 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1583 | int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
1584 | int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; | |
1585 | ||
a65a604a JB |
1586 | /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ |
1587 | if ((new_mtu < 68) || | |
1588 | (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { | |
6909c66d JP |
1589 | netif_err(adapter, probe, adapter->netdev, |
1590 | "Invalid MTU setting %d\n", new_mtu); | |
1da177e4 LT |
1591 | return -EINVAL; |
1592 | } | |
1593 | ||
b5ca88eb JB |
1594 | if (old_max_frame == max_frame) |
1595 | return 0; | |
1596 | ||
1597 | if (netif_running(netdev)) | |
1598 | ixgb_down(adapter, true); | |
1599 | ||
a3dc3da0 | 1600 | adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ |
1da177e4 LT |
1601 | |
1602 | netdev->mtu = new_mtu; | |
1603 | ||
b5ca88eb | 1604 | if (netif_running(netdev)) |
1da177e4 | 1605 | ixgb_up(adapter); |
1da177e4 LT |
1606 | |
1607 | return 0; | |
1608 | } | |
1609 | ||
1610 | /** | |
1611 | * ixgb_update_stats - Update the board statistics counters. | |
1612 | * @adapter: board private structure | |
1613 | **/ | |
1614 | ||
1615 | void | |
1616 | ixgb_update_stats(struct ixgb_adapter *adapter) | |
1617 | { | |
5633684d | 1618 | struct net_device *netdev = adapter->netdev; |
01748fbb LV |
1619 | struct pci_dev *pdev = adapter->pdev; |
1620 | ||
1621 | /* Prevent stats update while adapter is being reset */ | |
81b1955e | 1622 | if (pci_channel_offline(pdev)) |
01748fbb | 1623 | return; |
5633684d | 1624 | |
03f83041 | 1625 | if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || |
4cd24eaf | 1626 | (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { |
5633684d MC |
1627 | u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); |
1628 | u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); | |
1629 | u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); | |
0060c072 | 1630 | u64 bcast = ((u64)bcast_h << 32) | bcast_l; |
5633684d MC |
1631 | |
1632 | multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); | |
1633 | /* fix up multicast stats by removing broadcasts */ | |
03f83041 | 1634 | if (multi >= bcast) |
7b89178d | 1635 | multi -= bcast; |
0060c072 | 1636 | |
5633684d MC |
1637 | adapter->stats.mprcl += (multi & 0xFFFFFFFF); |
1638 | adapter->stats.mprch += (multi >> 32); | |
0060c072 | 1639 | adapter->stats.bprcl += bcast_l; |
5633684d MC |
1640 | adapter->stats.bprch += bcast_h; |
1641 | } else { | |
1642 | adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); | |
1643 | adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); | |
1644 | adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); | |
1645 | adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); | |
1646 | } | |
1da177e4 LT |
1647 | adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
1648 | adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); | |
1649 | adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); | |
1650 | adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); | |
1da177e4 LT |
1651 | adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
1652 | adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); | |
1653 | adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); | |
1654 | adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); | |
1655 | adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); | |
1656 | adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); | |
1657 | adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); | |
1658 | adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); | |
1659 | adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); | |
1660 | adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); | |
1661 | adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); | |
1662 | adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); | |
1663 | adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); | |
1664 | adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); | |
1665 | adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); | |
1666 | adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); | |
1667 | adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); | |
1668 | adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); | |
1669 | adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); | |
1670 | adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); | |
1671 | adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); | |
1672 | adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); | |
1673 | adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); | |
1674 | adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); | |
1675 | adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); | |
1676 | adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); | |
1677 | adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); | |
1678 | adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); | |
1679 | adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); | |
1680 | adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); | |
1681 | adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); | |
1682 | adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); | |
1683 | adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); | |
1684 | adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); | |
1685 | adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); | |
1686 | adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); | |
1687 | adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); | |
1688 | adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); | |
1689 | adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); | |
1690 | adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); | |
1691 | adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); | |
1692 | adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); | |
1693 | adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); | |
1694 | adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); | |
1695 | adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); | |
1696 | adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); | |
1697 | adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); | |
1698 | adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); | |
1699 | adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); | |
1700 | adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); | |
1701 | adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); | |
1702 | adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); | |
1703 | ||
1704 | /* Fill out the OS statistics structure */ | |
1705 | ||
0cdc0369 AK |
1706 | netdev->stats.rx_packets = adapter->stats.gprcl; |
1707 | netdev->stats.tx_packets = adapter->stats.gptcl; | |
1708 | netdev->stats.rx_bytes = adapter->stats.gorcl; | |
1709 | netdev->stats.tx_bytes = adapter->stats.gotcl; | |
1710 | netdev->stats.multicast = adapter->stats.mprcl; | |
1711 | netdev->stats.collisions = 0; | |
1da177e4 LT |
1712 | |
1713 | /* ignore RLEC as it reports errors for padded (<64bytes) frames | |
1714 | * with a length in the type/len field */ | |
0cdc0369 | 1715 | netdev->stats.rx_errors = |
1da177e4 LT |
1716 | /* adapter->stats.rnbc + */ adapter->stats.crcerrs + |
1717 | adapter->stats.ruc + | |
1718 | adapter->stats.roc /*+ adapter->stats.rlec */ + | |
1719 | adapter->stats.icbc + | |
1720 | adapter->stats.ecbc + adapter->stats.mpc; | |
1721 | ||
1da177e4 | 1722 | /* see above |
0cdc0369 | 1723 | * netdev->stats.rx_length_errors = adapter->stats.rlec; |
1da177e4 LT |
1724 | */ |
1725 | ||
0cdc0369 AK |
1726 | netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
1727 | netdev->stats.rx_fifo_errors = adapter->stats.mpc; | |
1728 | netdev->stats.rx_missed_errors = adapter->stats.mpc; | |
1729 | netdev->stats.rx_over_errors = adapter->stats.mpc; | |
1730 | ||
1731 | netdev->stats.tx_errors = 0; | |
1732 | netdev->stats.rx_frame_errors = 0; | |
1733 | netdev->stats.tx_aborted_errors = 0; | |
1734 | netdev->stats.tx_carrier_errors = 0; | |
1735 | netdev->stats.tx_fifo_errors = 0; | |
1736 | netdev->stats.tx_heartbeat_errors = 0; | |
1737 | netdev->stats.tx_window_errors = 0; | |
1da177e4 LT |
1738 | } |
1739 | ||
1740 | #define IXGB_MAX_INTR 10 | |
1741 | /** | |
1742 | * ixgb_intr - Interrupt Handler | |
1743 | * @irq: interrupt number | |
1744 | * @data: pointer to a network interface device structure | |
1da177e4 LT |
1745 | **/ |
1746 | ||
1747 | static irqreturn_t | |
7d12e780 | 1748 | ixgb_intr(int irq, void *data) |
1da177e4 LT |
1749 | { |
1750 | struct net_device *netdev = data; | |
8908c6cd | 1751 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1752 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 | 1753 | u32 icr = IXGB_READ_REG(hw, ICR); |
1da177e4 | 1754 | |
03f83041 | 1755 | if (unlikely(!icr)) |
1da177e4 LT |
1756 | return IRQ_NONE; /* Not our interrupt */ |
1757 | ||
bab2bce7 JB |
1758 | if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) |
1759 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) | |
1760 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1da177e4 | 1761 | |
288379f0 | 1762 | if (napi_schedule_prep(&adapter->napi)) { |
1da177e4 | 1763 | |
0060c072 | 1764 | /* Disable interrupts and register for poll. The flush |
1da177e4 LT |
1765 | of the posted write is intentionally left out. |
1766 | */ | |
1767 | ||
1da177e4 | 1768 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
288379f0 | 1769 | __napi_schedule(&adapter->napi); |
1da177e4 | 1770 | } |
1da177e4 LT |
1771 | return IRQ_HANDLED; |
1772 | } | |
1773 | ||
1da177e4 LT |
1774 | /** |
1775 | * ixgb_clean - NAPI Rx polling callback | |
1776 | * @adapter: board private structure | |
1777 | **/ | |
1778 | ||
1779 | static int | |
bea3348e | 1780 | ixgb_clean(struct napi_struct *napi, int budget) |
1da177e4 | 1781 | { |
bea3348e | 1782 | struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); |
1da177e4 LT |
1783 | int work_done = 0; |
1784 | ||
53e52c72 | 1785 | ixgb_clean_tx_irq(adapter); |
bea3348e | 1786 | ixgb_clean_rx_irq(adapter, &work_done, budget); |
1da177e4 | 1787 | |
53e52c72 DM |
1788 | /* If budget not fully consumed, exit the polling mode */ |
1789 | if (work_done < budget) { | |
288379f0 | 1790 | napi_complete(napi); |
72ab5195 JB |
1791 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
1792 | ixgb_irq_enable(adapter); | |
1da177e4 LT |
1793 | } |
1794 | ||
bea3348e | 1795 | return work_done; |
1da177e4 | 1796 | } |
1da177e4 LT |
1797 | |
1798 | /** | |
1799 | * ixgb_clean_tx_irq - Reclaim resources after transmit completes | |
1800 | * @adapter: board private structure | |
1801 | **/ | |
1802 | ||
446490ca | 1803 | static bool |
1da177e4 LT |
1804 | ixgb_clean_tx_irq(struct ixgb_adapter *adapter) |
1805 | { | |
1806 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1807 | struct net_device *netdev = adapter->netdev; | |
1808 | struct ixgb_tx_desc *tx_desc, *eop_desc; | |
1809 | struct ixgb_buffer *buffer_info; | |
1810 | unsigned int i, eop; | |
446490ca | 1811 | bool cleaned = false; |
1da177e4 LT |
1812 | |
1813 | i = tx_ring->next_to_clean; | |
1814 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1815 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1816 | ||
9a432992 | 1817 | while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { |
1da177e4 | 1818 | |
446490ca | 1819 | for (cleaned = false; !cleaned; ) { |
1da177e4 LT |
1820 | tx_desc = IXGB_TX_DESC(*tx_ring, i); |
1821 | buffer_info = &tx_ring->buffer_info[i]; | |
1822 | ||
0060c072 JB |
1823 | if (tx_desc->popts & |
1824 | (IXGB_TX_DESC_POPTS_TXSM | | |
1825 | IXGB_TX_DESC_POPTS_IXSM)) | |
1da177e4 LT |
1826 | adapter->hw_csum_tx_good++; |
1827 | ||
1828 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1829 | ||
222441a6 | 1830 | *(u32 *)&(tx_desc->status) = 0; |
1da177e4 LT |
1831 | |
1832 | cleaned = (i == eop); | |
03f83041 | 1833 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1834 | } |
1835 | ||
1836 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1837 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1838 | } | |
1839 | ||
1840 | tx_ring->next_to_clean = i; | |
1841 | ||
0f8ecbad JB |
1842 | if (unlikely(cleaned && netif_carrier_ok(netdev) && |
1843 | IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { | |
1844 | /* Make sure that anybody stopping the queue after this | |
1845 | * sees the new next_to_clean. */ | |
1846 | smp_mb(); | |
1847 | ||
1848 | if (netif_queue_stopped(netdev) && | |
1849 | !(test_bit(__IXGB_DOWN, &adapter->flags))) { | |
3352a3b2 | 1850 | netif_wake_queue(netdev); |
0f8ecbad JB |
1851 | ++adapter->restart_queue; |
1852 | } | |
1da177e4 | 1853 | } |
1da177e4 | 1854 | |
03f83041 | 1855 | if (adapter->detect_tx_hung) { |
1da177e4 LT |
1856 | /* detect a transmit hang in hardware, this serializes the |
1857 | * check with the clearing of time_stamp and movement of i */ | |
446490ca | 1858 | adapter->detect_tx_hung = false; |
fe52eeb8 | 1859 | if (tx_ring->buffer_info[eop].time_stamp && |
9b8118df | 1860 | time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) |
1da177e4 | 1861 | && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
9b8118df AK |
1862 | IXGB_STATUS_TXOFF)) { |
1863 | /* detected Tx unit hang */ | |
6909c66d JP |
1864 | netif_err(adapter, drv, adapter->netdev, |
1865 | "Detected Tx Unit Hang\n" | |
1866 | " TDH <%x>\n" | |
1867 | " TDT <%x>\n" | |
1868 | " next_to_use <%x>\n" | |
1869 | " next_to_clean <%x>\n" | |
1870 | "buffer_info[next_to_clean]\n" | |
1871 | " time_stamp <%lx>\n" | |
1872 | " next_to_watch <%x>\n" | |
1873 | " jiffies <%lx>\n" | |
1874 | " next_to_watch.status <%x>\n", | |
1875 | IXGB_READ_REG(&adapter->hw, TDH), | |
1876 | IXGB_READ_REG(&adapter->hw, TDT), | |
1877 | tx_ring->next_to_use, | |
1878 | tx_ring->next_to_clean, | |
1879 | tx_ring->buffer_info[eop].time_stamp, | |
1880 | eop, | |
1881 | jiffies, | |
1882 | eop_desc->status); | |
1da177e4 | 1883 | netif_stop_queue(netdev); |
9b8118df | 1884 | } |
1da177e4 LT |
1885 | } |
1886 | ||
1887 | return cleaned; | |
1888 | } | |
1889 | ||
1890 | /** | |
1891 | * ixgb_rx_checksum - Receive Checksum Offload for 82597. | |
1892 | * @adapter: board private structure | |
1893 | * @rx_desc: receive descriptor | |
1894 | * @sk_buff: socket buffer with received data | |
1895 | **/ | |
1896 | ||
235949d1 | 1897 | static void |
1da177e4 | 1898 | ixgb_rx_checksum(struct ixgb_adapter *adapter, |
0060c072 JB |
1899 | struct ixgb_rx_desc *rx_desc, |
1900 | struct sk_buff *skb) | |
1da177e4 LT |
1901 | { |
1902 | /* Ignore Checksum bit is set OR | |
1903 | * TCP Checksum has not been calculated | |
1904 | */ | |
03f83041 | 1905 | if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || |
1da177e4 LT |
1906 | (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { |
1907 | skb->ip_summed = CHECKSUM_NONE; | |
1908 | return; | |
1909 | } | |
1910 | ||
1911 | /* At this point we know the hardware did the TCP checksum */ | |
1912 | /* now look at the TCP checksum error bit */ | |
03f83041 | 1913 | if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { |
1da177e4 LT |
1914 | /* let the stack verify checksum errors */ |
1915 | skb->ip_summed = CHECKSUM_NONE; | |
1916 | adapter->hw_csum_rx_error++; | |
1917 | } else { | |
1918 | /* TCP checksum is good */ | |
1919 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1920 | adapter->hw_csum_rx_good++; | |
1921 | } | |
1922 | } | |
1923 | ||
57bf6eef JP |
1924 | /* |
1925 | * this should improve performance for small packets with large amounts | |
1926 | * of reassembly being done in the stack | |
1927 | */ | |
1928 | static void ixgb_check_copybreak(struct net_device *netdev, | |
1929 | struct ixgb_buffer *buffer_info, | |
1930 | u32 length, struct sk_buff **skb) | |
1931 | { | |
1932 | struct sk_buff *new_skb; | |
1933 | ||
1934 | if (length > copybreak) | |
1935 | return; | |
1936 | ||
1937 | new_skb = netdev_alloc_skb_ip_align(netdev, length); | |
1938 | if (!new_skb) | |
1939 | return; | |
1940 | ||
1941 | skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, | |
1942 | (*skb)->data - NET_IP_ALIGN, | |
1943 | length + NET_IP_ALIGN); | |
1944 | /* save the skb in buffer_info as good */ | |
1945 | buffer_info->skb = *skb; | |
1946 | *skb = new_skb; | |
1947 | } | |
1948 | ||
1da177e4 LT |
1949 | /** |
1950 | * ixgb_clean_rx_irq - Send received data up the network stack, | |
1951 | * @adapter: board private structure | |
1952 | **/ | |
1953 | ||
446490ca | 1954 | static bool |
1da177e4 | 1955 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) |
1da177e4 LT |
1956 | { |
1957 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
1958 | struct net_device *netdev = adapter->netdev; | |
1959 | struct pci_dev *pdev = adapter->pdev; | |
1960 | struct ixgb_rx_desc *rx_desc, *next_rxd; | |
1961 | struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; | |
222441a6 | 1962 | u32 length; |
1da177e4 | 1963 | unsigned int i, j; |
fc2d14e3 | 1964 | int cleaned_count = 0; |
446490ca | 1965 | bool cleaned = false; |
1da177e4 LT |
1966 | |
1967 | i = rx_ring->next_to_clean; | |
1968 | rx_desc = IXGB_RX_DESC(*rx_ring, i); | |
1969 | buffer_info = &rx_ring->buffer_info[i]; | |
1970 | ||
9a432992 | 1971 | while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { |
fc2d14e3 | 1972 | struct sk_buff *skb; |
f404de1c | 1973 | u8 status; |
1da177e4 | 1974 | |
03f83041 | 1975 | if (*work_done >= work_to_do) |
1da177e4 LT |
1976 | break; |
1977 | ||
1978 | (*work_done)++; | |
f404de1c | 1979 | status = rx_desc->status; |
1da177e4 | 1980 | skb = buffer_info->skb; |
1dfdd7df | 1981 | buffer_info->skb = NULL; |
f404de1c | 1982 | |
fc2d14e3 | 1983 | prefetch(skb->data - NET_IP_ALIGN); |
1da177e4 | 1984 | |
57bf6eef JP |
1985 | if (++i == rx_ring->count) |
1986 | i = 0; | |
1da177e4 LT |
1987 | next_rxd = IXGB_RX_DESC(*rx_ring, i); |
1988 | prefetch(next_rxd); | |
1989 | ||
57bf6eef JP |
1990 | j = i + 1; |
1991 | if (j == rx_ring->count) | |
1992 | j = 0; | |
1da177e4 LT |
1993 | next2_buffer = &rx_ring->buffer_info[j]; |
1994 | prefetch(next2_buffer); | |
1995 | ||
1996 | next_buffer = &rx_ring->buffer_info[i]; | |
1da177e4 | 1997 | |
446490ca | 1998 | cleaned = true; |
fc2d14e3 | 1999 | cleaned_count++; |
1da177e4 | 2000 | |
47631f85 | 2001 | dma_unmap_single(&pdev->dev, |
1da177e4 LT |
2002 | buffer_info->dma, |
2003 | buffer_info->length, | |
47631f85 | 2004 | DMA_FROM_DEVICE); |
fc2d14e3 | 2005 | buffer_info->dma = 0; |
1da177e4 LT |
2006 | |
2007 | length = le16_to_cpu(rx_desc->length); | |
fc2d14e3 | 2008 | rx_desc->length = 0; |
1da177e4 | 2009 | |
03f83041 | 2010 | if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
1da177e4 LT |
2011 | |
2012 | /* All receives must fit into a single buffer */ | |
2013 | ||
2014 | IXGB_DBG("Receive packet consumed multiple buffers " | |
2015 | "length<%x>\n", length); | |
2016 | ||
2017 | dev_kfree_skb_irq(skb); | |
f404de1c | 2018 | goto rxdesc_done; |
1da177e4 LT |
2019 | } |
2020 | ||
0060c072 JB |
2021 | if (unlikely(rx_desc->errors & |
2022 | (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | | |
2023 | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { | |
1da177e4 | 2024 | dev_kfree_skb_irq(skb); |
f404de1c | 2025 | goto rxdesc_done; |
1da177e4 LT |
2026 | } |
2027 | ||
57bf6eef | 2028 | ixgb_check_copybreak(netdev, buffer_info, length, &skb); |
6b900bb4 | 2029 | |
1da177e4 LT |
2030 | /* Good Receive */ |
2031 | skb_put(skb, length); | |
2032 | ||
2033 | /* Receive Checksum Offload */ | |
2034 | ixgb_rx_checksum(adapter, rx_desc, skb); | |
2035 | ||
2036 | skb->protocol = eth_type_trans(skb, netdev); | |
03f83041 | 2037 | if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { |
1da177e4 | 2038 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, |
0060c072 | 2039 | le16_to_cpu(rx_desc->special)); |
1da177e4 LT |
2040 | } else { |
2041 | netif_receive_skb(skb); | |
2042 | } | |
1da177e4 | 2043 | |
f404de1c MC |
2044 | rxdesc_done: |
2045 | /* clean up descriptor, might be written over by hw */ | |
1da177e4 | 2046 | rx_desc->status = 0; |
1da177e4 | 2047 | |
fc2d14e3 JB |
2048 | /* return some buffers to hardware, one at a time is too slow */ |
2049 | if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { | |
2050 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
2051 | cleaned_count = 0; | |
2052 | } | |
2053 | ||
f404de1c | 2054 | /* use prefetched values */ |
1da177e4 LT |
2055 | rx_desc = next_rxd; |
2056 | buffer_info = next_buffer; | |
2057 | } | |
2058 | ||
2059 | rx_ring->next_to_clean = i; | |
2060 | ||
fc2d14e3 JB |
2061 | cleaned_count = IXGB_DESC_UNUSED(rx_ring); |
2062 | if (cleaned_count) | |
2063 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
1da177e4 LT |
2064 | |
2065 | return cleaned; | |
2066 | } | |
2067 | ||
2068 | /** | |
2069 | * ixgb_alloc_rx_buffers - Replace used receive buffers | |
2070 | * @adapter: address of board private structure | |
2071 | **/ | |
2072 | ||
2073 | static void | |
fc2d14e3 | 2074 | ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) |
1da177e4 LT |
2075 | { |
2076 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
2077 | struct net_device *netdev = adapter->netdev; | |
2078 | struct pci_dev *pdev = adapter->pdev; | |
2079 | struct ixgb_rx_desc *rx_desc; | |
2080 | struct ixgb_buffer *buffer_info; | |
2081 | struct sk_buff *skb; | |
2082 | unsigned int i; | |
1da177e4 LT |
2083 | long cleancount; |
2084 | ||
2085 | i = rx_ring->next_to_use; | |
2086 | buffer_info = &rx_ring->buffer_info[i]; | |
2087 | cleancount = IXGB_DESC_UNUSED(rx_ring); | |
2088 | ||
1da177e4 | 2089 | |
41639fed | 2090 | /* leave three descriptors unused */ |
fc2d14e3 | 2091 | while (--cleancount > 2 && cleaned_count--) { |
1dfdd7df | 2092 | /* recycle! its good for you */ |
69c7a940 AK |
2093 | skb = buffer_info->skb; |
2094 | if (skb) { | |
1dfdd7df AK |
2095 | skb_trim(skb, 0); |
2096 | goto map_skb; | |
2097 | } | |
1da177e4 | 2098 | |
89d71a66 | 2099 | skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len); |
1dfdd7df | 2100 | if (unlikely(!skb)) { |
1da177e4 | 2101 | /* Better luck next round */ |
1dfdd7df | 2102 | adapter->alloc_rx_buff_failed++; |
1da177e4 LT |
2103 | break; |
2104 | } | |
2105 | ||
1da177e4 LT |
2106 | buffer_info->skb = skb; |
2107 | buffer_info->length = adapter->rx_buffer_len; | |
1dfdd7df | 2108 | map_skb: |
47631f85 | 2109 | buffer_info->dma = dma_map_single(&pdev->dev, |
1dfdd7df AK |
2110 | skb->data, |
2111 | adapter->rx_buffer_len, | |
47631f85 | 2112 | DMA_FROM_DEVICE); |
1da177e4 | 2113 | |
1dfdd7df | 2114 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
1da177e4 | 2115 | rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
41639fed | 2116 | /* guarantee DD bit not set now before h/w gets descriptor |
0060c072 | 2117 | * this is the rest of the workaround for h/w double |
41639fed MC |
2118 | * writeback. */ |
2119 | rx_desc->status = 0; | |
1da177e4 | 2120 | |
1da177e4 | 2121 | |
03f83041 | 2122 | if (++i == rx_ring->count) i = 0; |
1da177e4 LT |
2123 | buffer_info = &rx_ring->buffer_info[i]; |
2124 | } | |
2125 | ||
1dfdd7df AK |
2126 | if (likely(rx_ring->next_to_use != i)) { |
2127 | rx_ring->next_to_use = i; | |
2128 | if (unlikely(i-- == 0)) | |
2129 | i = (rx_ring->count - 1); | |
2130 | ||
2131 | /* Force memory writes to complete before letting h/w | |
2132 | * know there are new descriptors to fetch. (Only | |
2133 | * applicable for weak-ordered memory model archs, such | |
2134 | * as IA-64). */ | |
2135 | wmb(); | |
2136 | IXGB_WRITE_REG(&adapter->hw, RDT, i); | |
2137 | } | |
1da177e4 LT |
2138 | } |
2139 | ||
2140 | /** | |
2141 | * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. | |
0060c072 | 2142 | * |
1da177e4 LT |
2143 | * @param netdev network interface device structure |
2144 | * @param grp indicates to enable or disable tagging/stripping | |
2145 | **/ | |
2146 | static void | |
2147 | ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) | |
2148 | { | |
8908c6cd | 2149 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2150 | u32 ctrl, rctl; |
1da177e4 LT |
2151 | |
2152 | ixgb_irq_disable(adapter); | |
2153 | adapter->vlgrp = grp; | |
2154 | ||
03f83041 | 2155 | if (grp) { |
1da177e4 LT |
2156 | /* enable VLAN tag insert/strip */ |
2157 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2158 | ctrl |= IXGB_CTRL0_VME; | |
2159 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
2160 | ||
2161 | /* enable VLAN receive filtering */ | |
2162 | ||
2163 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
1da177e4 LT |
2164 | rctl &= ~IXGB_RCTL_CFIEN; |
2165 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
2166 | } else { | |
2167 | /* disable VLAN tag insert/strip */ | |
2168 | ||
2169 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2170 | ctrl &= ~IXGB_CTRL0_VME; | |
2171 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
1da177e4 LT |
2172 | } |
2173 | ||
bab2bce7 JB |
2174 | /* don't enable interrupts unless we are UP */ |
2175 | if (adapter->netdev->flags & IFF_UP) | |
2176 | ixgb_irq_enable(adapter); | |
1da177e4 LT |
2177 | } |
2178 | ||
2179 | static void | |
222441a6 | 2180 | ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2181 | { |
8908c6cd | 2182 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2183 | u32 vfta, index; |
1da177e4 LT |
2184 | |
2185 | /* add VID to filter table */ | |
2186 | ||
2187 | index = (vid >> 5) & 0x7F; | |
2188 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2189 | vfta |= (1 << (vid & 0x1F)); | |
2190 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2191 | } | |
2192 | ||
2193 | static void | |
222441a6 | 2194 | ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2195 | { |
8908c6cd | 2196 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2197 | u32 vfta, index; |
1da177e4 LT |
2198 | |
2199 | ixgb_irq_disable(adapter); | |
2200 | ||
5c15bdec | 2201 | vlan_group_set_device(adapter->vlgrp, vid, NULL); |
1da177e4 | 2202 | |
bab2bce7 JB |
2203 | /* don't enable interrupts unless we are UP */ |
2204 | if (adapter->netdev->flags & IFF_UP) | |
2205 | ixgb_irq_enable(adapter); | |
1da177e4 | 2206 | |
bab2bce7 | 2207 | /* remove VID from filter table */ |
1da177e4 LT |
2208 | |
2209 | index = (vid >> 5) & 0x7F; | |
2210 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2211 | vfta &= ~(1 << (vid & 0x1F)); | |
2212 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2213 | } | |
2214 | ||
2215 | static void | |
2216 | ixgb_restore_vlan(struct ixgb_adapter *adapter) | |
2217 | { | |
2218 | ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); | |
2219 | ||
03f83041 | 2220 | if (adapter->vlgrp) { |
222441a6 | 2221 | u16 vid; |
1459336d | 2222 | for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { |
03f83041 | 2223 | if (!vlan_group_get_device(adapter->vlgrp, vid)) |
1da177e4 LT |
2224 | continue; |
2225 | ixgb_vlan_rx_add_vid(adapter->netdev, vid); | |
2226 | } | |
2227 | } | |
2228 | } | |
2229 | ||
1da177e4 LT |
2230 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2231 | /* | |
2232 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2233 | * without having to re-enable interrupts. It's not called while | |
2234 | * the interrupt routine is executing. | |
2235 | */ | |
2236 | ||
2237 | static void ixgb_netpoll(struct net_device *dev) | |
2238 | { | |
f990b426 | 2239 | struct ixgb_adapter *adapter = netdev_priv(dev); |
ac79c82e | 2240 | |
1da177e4 | 2241 | disable_irq(adapter->pdev->irq); |
7d12e780 | 2242 | ixgb_intr(adapter->pdev->irq, dev); |
1da177e4 LT |
2243 | enable_irq(adapter->pdev->irq); |
2244 | } | |
2245 | #endif | |
2246 | ||
01748fbb LV |
2247 | /** |
2248 | * ixgb_io_error_detected() - called when PCI error is detected | |
2249 | * @pdev pointer to pci device with error | |
2250 | * @state pci channel state after error | |
2251 | * | |
2252 | * This callback is called by the PCI subsystem whenever | |
2253 | * a PCI bus error is detected. | |
2254 | */ | |
0060c072 JB |
2255 | static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, |
2256 | enum pci_channel_state state) | |
01748fbb LV |
2257 | { |
2258 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2259 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2260 | |
d6a1f83b DN |
2261 | netif_device_detach(netdev); |
2262 | ||
2263 | if (state == pci_channel_io_perm_failure) | |
2264 | return PCI_ERS_RESULT_DISCONNECT; | |
2265 | ||
03f83041 | 2266 | if (netif_running(netdev)) |
446490ca | 2267 | ixgb_down(adapter, true); |
01748fbb LV |
2268 | |
2269 | pci_disable_device(pdev); | |
2270 | ||
2271 | /* Request a slot reset. */ | |
2272 | return PCI_ERS_RESULT_NEED_RESET; | |
2273 | } | |
2274 | ||
2275 | /** | |
2276 | * ixgb_io_slot_reset - called after the pci bus has been reset. | |
2277 | * @pdev pointer to pci device with error | |
2278 | * | |
52035bdb | 2279 | * This callback is called after the PCI bus has been reset. |
01748fbb LV |
2280 | * Basically, this tries to restart the card from scratch. |
2281 | * This is a shortened version of the device probe/discovery code, | |
2282 | * it resembles the first-half of the ixgb_probe() routine. | |
2283 | */ | |
0060c072 | 2284 | static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) |
01748fbb LV |
2285 | { |
2286 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2287 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2288 | |
03f83041 | 2289 | if (pci_enable_device(pdev)) { |
6909c66d JP |
2290 | netif_err(adapter, probe, adapter->netdev, |
2291 | "Cannot re-enable PCI device after reset\n"); | |
01748fbb LV |
2292 | return PCI_ERS_RESULT_DISCONNECT; |
2293 | } | |
2294 | ||
2295 | /* Perform card reset only on one instance of the card */ | |
2296 | if (0 != PCI_FUNC (pdev->devfn)) | |
2297 | return PCI_ERS_RESULT_RECOVERED; | |
2298 | ||
2299 | pci_set_master(pdev); | |
2300 | ||
2301 | netif_carrier_off(netdev); | |
2302 | netif_stop_queue(netdev); | |
2303 | ixgb_reset(adapter); | |
2304 | ||
2305 | /* Make sure the EEPROM is good */ | |
03f83041 | 2306 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
6909c66d JP |
2307 | netif_err(adapter, probe, adapter->netdev, |
2308 | "After reset, the EEPROM checksum is not valid\n"); | |
01748fbb LV |
2309 | return PCI_ERS_RESULT_DISCONNECT; |
2310 | } | |
2311 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
2312 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); | |
2313 | ||
03f83041 | 2314 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
6909c66d JP |
2315 | netif_err(adapter, probe, adapter->netdev, |
2316 | "After reset, invalid MAC address\n"); | |
01748fbb LV |
2317 | return PCI_ERS_RESULT_DISCONNECT; |
2318 | } | |
2319 | ||
2320 | return PCI_ERS_RESULT_RECOVERED; | |
2321 | } | |
2322 | ||
2323 | /** | |
2324 | * ixgb_io_resume - called when its OK to resume normal operations | |
2325 | * @pdev pointer to pci device with error | |
2326 | * | |
2327 | * The error recovery driver tells us that its OK to resume | |
2328 | * normal operation. Implementation resembles the second-half | |
2329 | * of the ixgb_probe() routine. | |
2330 | */ | |
0060c072 | 2331 | static void ixgb_io_resume(struct pci_dev *pdev) |
01748fbb LV |
2332 | { |
2333 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2334 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb LV |
2335 | |
2336 | pci_set_master(pdev); | |
2337 | ||
03f83041 JB |
2338 | if (netif_running(netdev)) { |
2339 | if (ixgb_up(adapter)) { | |
d328bc83 | 2340 | pr_err("can't bring device back up after reset\n"); |
01748fbb LV |
2341 | return; |
2342 | } | |
2343 | } | |
2344 | ||
2345 | netif_device_attach(netdev); | |
2346 | mod_timer(&adapter->watchdog_timer, jiffies); | |
2347 | } | |
2348 | ||
1da177e4 | 2349 | /* ixgb_main.c */ |