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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 | |
ae54496f ET |
101 | static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter); |
102 | static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter); | |
1da177e4 | 103 | static void ixgb_vlan_rx_register(struct net_device *netdev, |
7490d71a | 104 | struct vlan_group *grp); |
222441a6 JP |
105 | static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
106 | static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); | |
1da177e4 LT |
107 | static void ixgb_restore_vlan(struct ixgb_adapter *adapter); |
108 | ||
1da177e4 LT |
109 | #ifdef CONFIG_NET_POLL_CONTROLLER |
110 | /* for netdump / net console */ | |
111 | static void ixgb_netpoll(struct net_device *dev); | |
112 | #endif | |
113 | ||
01748fbb | 114 | static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, |
7490d71a | 115 | enum pci_channel_state state); |
01748fbb LV |
116 | static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); |
117 | static void ixgb_io_resume (struct pci_dev *pdev); | |
1da177e4 | 118 | |
01748fbb LV |
119 | static struct pci_error_handlers ixgb_err_handler = { |
120 | .error_detected = ixgb_io_error_detected, | |
121 | .slot_reset = ixgb_io_slot_reset, | |
122 | .resume = ixgb_io_resume, | |
123 | }; | |
124 | ||
1da177e4 | 125 | static struct pci_driver ixgb_driver = { |
c2eba932 | 126 | .name = ixgb_driver_name, |
1da177e4 | 127 | .id_table = ixgb_pci_tbl, |
c2eba932 MC |
128 | .probe = ixgb_probe, |
129 | .remove = __devexit_p(ixgb_remove), | |
01748fbb | 130 | .err_handler = &ixgb_err_handler |
1da177e4 LT |
131 | }; |
132 | ||
133 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); | |
134 | MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); | |
135 | MODULE_LICENSE("GPL"); | |
01e5abc2 | 136 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 137 | |
ec9c3f5d AK |
138 | #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
139 | static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; | |
140 | module_param(debug, int, 0); | |
141 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
142 | ||
1da177e4 LT |
143 | /** |
144 | * ixgb_init_module - Driver Registration Routine | |
145 | * | |
146 | * ixgb_init_module is the first routine called when the driver is | |
147 | * loaded. All it does is register with the PCI subsystem. | |
148 | **/ | |
149 | ||
150 | static int __init | |
151 | ixgb_init_module(void) | |
152 | { | |
d328bc83 JP |
153 | pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version); |
154 | pr_info("%s\n", ixgb_copyright); | |
1da177e4 | 155 | |
29917620 | 156 | return pci_register_driver(&ixgb_driver); |
1da177e4 LT |
157 | } |
158 | ||
159 | module_init(ixgb_init_module); | |
160 | ||
161 | /** | |
162 | * ixgb_exit_module - Driver Exit Cleanup Routine | |
163 | * | |
164 | * ixgb_exit_module is called just before the driver is removed | |
165 | * from memory. | |
166 | **/ | |
167 | ||
168 | static void __exit | |
169 | ixgb_exit_module(void) | |
170 | { | |
1da177e4 LT |
171 | pci_unregister_driver(&ixgb_driver); |
172 | } | |
173 | ||
174 | module_exit(ixgb_exit_module); | |
175 | ||
176 | /** | |
177 | * ixgb_irq_disable - Mask off interrupt generation on the NIC | |
178 | * @adapter: board private structure | |
179 | **/ | |
180 | ||
235949d1 | 181 | static void |
1da177e4 LT |
182 | ixgb_irq_disable(struct ixgb_adapter *adapter) |
183 | { | |
1da177e4 LT |
184 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
185 | IXGB_WRITE_FLUSH(&adapter->hw); | |
186 | synchronize_irq(adapter->pdev->irq); | |
187 | } | |
188 | ||
189 | /** | |
190 | * ixgb_irq_enable - Enable default interrupt generation settings | |
191 | * @adapter: board private structure | |
192 | **/ | |
193 | ||
235949d1 | 194 | static void |
1da177e4 LT |
195 | ixgb_irq_enable(struct ixgb_adapter *adapter) |
196 | { | |
9c61a9dc JB |
197 | u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | |
198 | IXGB_INT_TXDW | IXGB_INT_LSC; | |
199 | if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID) | |
200 | val |= IXGB_INT_GPI0; | |
201 | IXGB_WRITE_REG(&adapter->hw, IMS, val); | |
202 | IXGB_WRITE_FLUSH(&adapter->hw); | |
1da177e4 LT |
203 | } |
204 | ||
205 | int | |
206 | ixgb_up(struct ixgb_adapter *adapter) | |
207 | { | |
208 | struct net_device *netdev = adapter->netdev; | |
fb136c07 | 209 | int err, irq_flags = IRQF_SHARED; |
1da177e4 LT |
210 | int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
211 | struct ixgb_hw *hw = &adapter->hw; | |
212 | ||
213 | /* hardware has been reset, we need to reload some things */ | |
214 | ||
8556f0d1 | 215 | ixgb_rar_set(hw, netdev->dev_addr, 0); |
1da177e4 LT |
216 | ixgb_set_multi(netdev); |
217 | ||
218 | ixgb_restore_vlan(adapter); | |
219 | ||
220 | ixgb_configure_tx(adapter); | |
221 | ixgb_setup_rctl(adapter); | |
222 | ixgb_configure_rx(adapter); | |
fc2d14e3 | 223 | ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); |
1da177e4 | 224 | |
e59d1696 AK |
225 | /* disable interrupts and get the hardware into a known state */ |
226 | IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); | |
227 | ||
fb136c07 AK |
228 | /* only enable MSI if bus is in PCI-X mode */ |
229 | if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { | |
230 | err = pci_enable_msi(adapter->pdev); | |
231 | if (!err) { | |
232 | adapter->have_msi = 1; | |
233 | irq_flags = 0; | |
234 | } | |
1da177e4 LT |
235 | /* proceed to try to request regular interrupt */ |
236 | } | |
1da177e4 | 237 | |
a0607fd3 | 238 | err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags, |
fb136c07 AK |
239 | netdev->name, netdev); |
240 | if (err) { | |
241 | if (adapter->have_msi) | |
242 | pci_disable_msi(adapter->pdev); | |
6909c66d JP |
243 | netif_err(adapter, probe, adapter->netdev, |
244 | "Unable to allocate interrupt Error: %d\n", err); | |
1da177e4 | 245 | return err; |
ec9c3f5d | 246 | } |
1da177e4 | 247 | |
03f83041 | 248 | if ((hw->max_frame_size != max_frame) || |
1da177e4 LT |
249 | (hw->max_frame_size != |
250 | (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { | |
251 | ||
252 | hw->max_frame_size = max_frame; | |
253 | ||
254 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
255 | ||
03f83041 | 256 | if (hw->max_frame_size > |
1da177e4 | 257 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { |
222441a6 | 258 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); |
1da177e4 | 259 | |
03f83041 | 260 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { |
1da177e4 LT |
261 | ctrl0 |= IXGB_CTRL0_JFE; |
262 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
bab2bce7 | 267 | clear_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 | 268 | |
bea3348e | 269 | napi_enable(&adapter->napi); |
e59d1696 AK |
270 | ixgb_irq_enable(adapter); |
271 | ||
4cb9be7a JB |
272 | netif_wake_queue(netdev); |
273 | ||
bab2bce7 JB |
274 | mod_timer(&adapter->watchdog_timer, jiffies); |
275 | ||
1da177e4 LT |
276 | return 0; |
277 | } | |
278 | ||
279 | void | |
446490ca | 280 | ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) |
1da177e4 LT |
281 | { |
282 | struct net_device *netdev = adapter->netdev; | |
283 | ||
bab2bce7 JB |
284 | /* prevent the interrupt handler from restarting watchdog */ |
285 | set_bit(__IXGB_DOWN, &adapter->flags); | |
286 | ||
49d85c50 | 287 | napi_disable(&adapter->napi); |
bab2bce7 | 288 | /* waiting for NAPI to complete can re-enable interrupts */ |
1da177e4 LT |
289 | ixgb_irq_disable(adapter); |
290 | free_irq(adapter->pdev->irq, netdev); | |
fb136c07 AK |
291 | |
292 | if (adapter->have_msi) | |
1da177e4 LT |
293 | pci_disable_msi(adapter->pdev); |
294 | ||
03f83041 | 295 | if (kill_watchdog) |
1da177e4 | 296 | del_timer_sync(&adapter->watchdog_timer); |
49d85c50 | 297 | |
1da177e4 LT |
298 | adapter->link_speed = 0; |
299 | adapter->link_duplex = 0; | |
300 | netif_carrier_off(netdev); | |
301 | netif_stop_queue(netdev); | |
302 | ||
303 | ixgb_reset(adapter); | |
304 | ixgb_clean_tx_ring(adapter); | |
305 | ixgb_clean_rx_ring(adapter); | |
306 | } | |
307 | ||
308 | void | |
309 | ixgb_reset(struct ixgb_adapter *adapter) | |
310 | { | |
3fd7131f | 311 | struct ixgb_hw *hw = &adapter->hw; |
1da177e4 | 312 | |
3fd7131f MW |
313 | ixgb_adapter_stop(hw); |
314 | if (!ixgb_init_hw(hw)) | |
6909c66d | 315 | netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n"); |
3fd7131f MW |
316 | |
317 | /* restore frame size information */ | |
318 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
319 | if (hw->max_frame_size > | |
320 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { | |
321 | u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); | |
322 | if (!(ctrl0 & IXGB_CTRL0_JFE)) { | |
323 | ctrl0 |= IXGB_CTRL0_JFE; | |
324 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
325 | } | |
326 | } | |
1da177e4 LT |
327 | } |
328 | ||
0edc3527 SH |
329 | static const struct net_device_ops ixgb_netdev_ops = { |
330 | .ndo_open = ixgb_open, | |
331 | .ndo_stop = ixgb_close, | |
00829823 | 332 | .ndo_start_xmit = ixgb_xmit_frame, |
0edc3527 SH |
333 | .ndo_get_stats = ixgb_get_stats, |
334 | .ndo_set_multicast_list = ixgb_set_multi, | |
335 | .ndo_validate_addr = eth_validate_addr, | |
336 | .ndo_set_mac_address = ixgb_set_mac, | |
337 | .ndo_change_mtu = ixgb_change_mtu, | |
338 | .ndo_tx_timeout = ixgb_tx_timeout, | |
339 | .ndo_vlan_rx_register = ixgb_vlan_rx_register, | |
340 | .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, | |
341 | .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, | |
342 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
343 | .ndo_poll_controller = ixgb_netpoll, | |
344 | #endif | |
345 | }; | |
346 | ||
1da177e4 LT |
347 | /** |
348 | * ixgb_probe - Device Initialization Routine | |
349 | * @pdev: PCI device information struct | |
350 | * @ent: entry in ixgb_pci_tbl | |
351 | * | |
352 | * Returns 0 on success, negative on failure | |
353 | * | |
354 | * ixgb_probe initializes an adapter identified by a pci_dev structure. | |
355 | * The OS initialization, configuring of the adapter private structure, | |
356 | * and a hardware reset occur. | |
357 | **/ | |
358 | ||
359 | static int __devinit | |
0060c072 | 360 | ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
361 | { |
362 | struct net_device *netdev = NULL; | |
363 | struct ixgb_adapter *adapter; | |
364 | static int cards_found = 0; | |
1da177e4 LT |
365 | int pci_using_dac; |
366 | int i; | |
367 | int err; | |
368 | ||
9e7bd330 JB |
369 | err = pci_enable_device(pdev); |
370 | if (err) | |
1da177e4 LT |
371 | return err; |
372 | ||
47631f85 NN |
373 | pci_using_dac = 0; |
374 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); | |
375 | if (!err) { | |
376 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); | |
377 | if (!err) | |
378 | pci_using_dac = 1; | |
1da177e4 | 379 | } else { |
47631f85 NN |
380 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
381 | if (err) { | |
382 | err = dma_set_coherent_mask(&pdev->dev, | |
383 | DMA_BIT_MASK(32)); | |
384 | if (err) { | |
385 | pr_err("No usable DMA configuration, aborting\n"); | |
386 | goto err_dma_mask; | |
387 | } | |
1da177e4 | 388 | } |
1da177e4 LT |
389 | } |
390 | ||
9e7bd330 JB |
391 | err = pci_request_regions(pdev, ixgb_driver_name); |
392 | if (err) | |
c91e468a | 393 | goto err_request_regions; |
1da177e4 LT |
394 | |
395 | pci_set_master(pdev); | |
396 | ||
397 | netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); | |
03f83041 | 398 | if (!netdev) { |
1da177e4 LT |
399 | err = -ENOMEM; |
400 | goto err_alloc_etherdev; | |
401 | } | |
402 | ||
1da177e4 LT |
403 | SET_NETDEV_DEV(netdev, &pdev->dev); |
404 | ||
405 | pci_set_drvdata(pdev, netdev); | |
8908c6cd | 406 | adapter = netdev_priv(netdev); |
1da177e4 LT |
407 | adapter->netdev = netdev; |
408 | adapter->pdev = pdev; | |
409 | adapter->hw.back = adapter; | |
ec9c3f5d | 410 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); |
1da177e4 | 411 | |
275f165f | 412 | adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); |
e539e466 | 413 | if (!adapter->hw.hw_addr) { |
1da177e4 LT |
414 | err = -EIO; |
415 | goto err_ioremap; | |
416 | } | |
417 | ||
1459336d | 418 | for (i = BAR_1; i <= BAR_5; i++) { |
03f83041 | 419 | if (pci_resource_len(pdev, i) == 0) |
1da177e4 | 420 | continue; |
03f83041 | 421 | if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
1da177e4 LT |
422 | adapter->hw.io_base = pci_resource_start(pdev, i); |
423 | break; | |
424 | } | |
425 | } | |
426 | ||
0edc3527 | 427 | netdev->netdev_ops = &ixgb_netdev_ops; |
1da177e4 | 428 | ixgb_set_ethtool_ops(netdev); |
9b8118df | 429 | netdev->watchdog_timeo = 5 * HZ; |
bea3348e | 430 | netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); |
1da177e4 | 431 | |
0eb5a34c | 432 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
1da177e4 LT |
433 | |
434 | adapter->bd_number = cards_found; | |
435 | adapter->link_speed = 0; | |
436 | adapter->link_duplex = 0; | |
437 | ||
438 | /* setup the private structure */ | |
439 | ||
9e7bd330 JB |
440 | err = ixgb_sw_init(adapter); |
441 | if (err) | |
1da177e4 LT |
442 | goto err_sw_init; |
443 | ||
444 | netdev->features = NETIF_F_SG | | |
445 | NETIF_F_HW_CSUM | | |
446 | NETIF_F_HW_VLAN_TX | | |
447 | NETIF_F_HW_VLAN_RX | | |
448 | NETIF_F_HW_VLAN_FILTER; | |
1da177e4 | 449 | netdev->features |= NETIF_F_TSO; |
1da177e4 | 450 | |
7b872a55 | 451 | if (pci_using_dac) { |
1da177e4 | 452 | netdev->features |= NETIF_F_HIGHDMA; |
7b872a55 YZ |
453 | netdev->vlan_features |= NETIF_F_HIGHDMA; |
454 | } | |
1da177e4 LT |
455 | |
456 | /* make sure the EEPROM is good */ | |
457 | ||
03f83041 | 458 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
6909c66d JP |
459 | netif_err(adapter, probe, adapter->netdev, |
460 | "The EEPROM Checksum Is Not Valid\n"); | |
1da177e4 LT |
461 | err = -EIO; |
462 | goto err_eeprom; | |
463 | } | |
464 | ||
465 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
df859c51 | 466 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
1da177e4 | 467 | |
03f83041 | 468 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
6909c66d | 469 | netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n"); |
1da177e4 LT |
470 | err = -EIO; |
471 | goto err_eeprom; | |
472 | } | |
473 | ||
474 | adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); | |
475 | ||
476 | init_timer(&adapter->watchdog_timer); | |
c061b18d | 477 | adapter->watchdog_timer.function = ixgb_watchdog; |
1da177e4 LT |
478 | adapter->watchdog_timer.data = (unsigned long)adapter; |
479 | ||
c4028958 | 480 | INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); |
1da177e4 | 481 | |
ec9c3f5d | 482 | strcpy(netdev->name, "eth%d"); |
9e7bd330 JB |
483 | err = register_netdev(netdev); |
484 | if (err) | |
1da177e4 LT |
485 | goto err_register; |
486 | ||
3a6d1bc4 | 487 | /* carrier off reporting is important to ethtool even BEFORE open */ |
1da177e4 | 488 | netif_carrier_off(netdev); |
1da177e4 | 489 | |
6909c66d JP |
490 | netif_info(adapter, probe, adapter->netdev, |
491 | "Intel(R) PRO/10GbE Network Connection\n"); | |
1da177e4 LT |
492 | ixgb_check_options(adapter); |
493 | /* reset the hardware with the new settings */ | |
494 | ||
495 | ixgb_reset(adapter); | |
496 | ||
497 | cards_found++; | |
498 | return 0; | |
499 | ||
500 | err_register: | |
501 | err_sw_init: | |
502 | err_eeprom: | |
503 | iounmap(adapter->hw.hw_addr); | |
504 | err_ioremap: | |
505 | free_netdev(netdev); | |
506 | err_alloc_etherdev: | |
507 | pci_release_regions(pdev); | |
c91e468a AS |
508 | err_request_regions: |
509 | err_dma_mask: | |
510 | pci_disable_device(pdev); | |
1da177e4 LT |
511 | return err; |
512 | } | |
513 | ||
514 | /** | |
515 | * ixgb_remove - Device Removal Routine | |
516 | * @pdev: PCI device information struct | |
517 | * | |
518 | * ixgb_remove is called by the PCI subsystem to alert the driver | |
519 | * that it should release a PCI device. The could be caused by a | |
520 | * Hot-Plug event, or because the driver is going to be removed from | |
521 | * memory. | |
522 | **/ | |
523 | ||
524 | static void __devexit | |
525 | ixgb_remove(struct pci_dev *pdev) | |
526 | { | |
527 | struct net_device *netdev = pci_get_drvdata(pdev); | |
8908c6cd | 528 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 529 | |
23f333a2 | 530 | cancel_work_sync(&adapter->tx_timeout_task); |
12579697 | 531 | |
1da177e4 LT |
532 | unregister_netdev(netdev); |
533 | ||
534 | iounmap(adapter->hw.hw_addr); | |
535 | pci_release_regions(pdev); | |
536 | ||
537 | free_netdev(netdev); | |
ec43a81c | 538 | pci_disable_device(pdev); |
1da177e4 LT |
539 | } |
540 | ||
541 | /** | |
542 | * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) | |
543 | * @adapter: board private structure to initialize | |
544 | * | |
545 | * ixgb_sw_init initializes the Adapter private data structure. | |
546 | * Fields are initialized based on PCI device information and | |
547 | * OS network device settings (MTU size). | |
548 | **/ | |
549 | ||
550 | static int __devinit | |
551 | ixgb_sw_init(struct ixgb_adapter *adapter) | |
552 | { | |
553 | struct ixgb_hw *hw = &adapter->hw; | |
554 | struct net_device *netdev = adapter->netdev; | |
555 | struct pci_dev *pdev = adapter->pdev; | |
556 | ||
557 | /* PCI config space info */ | |
558 | ||
559 | hw->vendor_id = pdev->vendor; | |
560 | hw->device_id = pdev->device; | |
561 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
562 | hw->subsystem_id = pdev->subsystem_device; | |
563 | ||
1da177e4 | 564 | hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
a3dc3da0 | 565 | adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ |
1da177e4 | 566 | |
6909c66d JP |
567 | if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || |
568 | (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || | |
569 | (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || | |
570 | (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) | |
0060c072 | 571 | hw->mac_type = ixgb_82597; |
1da177e4 LT |
572 | else { |
573 | /* should never have loaded on this device */ | |
6909c66d | 574 | netif_err(adapter, probe, adapter->netdev, "unsupported device id\n"); |
1da177e4 LT |
575 | } |
576 | ||
577 | /* enable flow control to be programmed */ | |
578 | hw->fc.send_xon = 1; | |
579 | ||
bab2bce7 | 580 | set_bit(__IXGB_DOWN, &adapter->flags); |
1da177e4 LT |
581 | return 0; |
582 | } | |
583 | ||
584 | /** | |
585 | * ixgb_open - Called when a network interface is made active | |
586 | * @netdev: network interface device structure | |
587 | * | |
588 | * Returns 0 on success, negative value on failure | |
589 | * | |
590 | * The open entry point is called when a network interface is made | |
591 | * active by the system (IFF_UP). At this point all resources needed | |
592 | * for transmit and receive operations are allocated, the interrupt | |
593 | * handler is registered with the OS, the watchdog timer is started, | |
594 | * and the stack is notified that the interface is ready. | |
595 | **/ | |
596 | ||
597 | static int | |
598 | ixgb_open(struct net_device *netdev) | |
599 | { | |
8908c6cd | 600 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
601 | int err; |
602 | ||
603 | /* allocate transmit descriptors */ | |
9e7bd330 JB |
604 | err = ixgb_setup_tx_resources(adapter); |
605 | if (err) | |
1da177e4 LT |
606 | goto err_setup_tx; |
607 | ||
3a6d1bc4 JB |
608 | netif_carrier_off(netdev); |
609 | ||
1da177e4 LT |
610 | /* allocate receive descriptors */ |
611 | ||
9e7bd330 JB |
612 | err = ixgb_setup_rx_resources(adapter); |
613 | if (err) | |
1da177e4 LT |
614 | goto err_setup_rx; |
615 | ||
9e7bd330 JB |
616 | err = ixgb_up(adapter); |
617 | if (err) | |
1da177e4 LT |
618 | goto err_up; |
619 | ||
3a6d1bc4 JB |
620 | netif_start_queue(netdev); |
621 | ||
1da177e4 LT |
622 | return 0; |
623 | ||
624 | err_up: | |
625 | ixgb_free_rx_resources(adapter); | |
626 | err_setup_rx: | |
627 | ixgb_free_tx_resources(adapter); | |
628 | err_setup_tx: | |
629 | ixgb_reset(adapter); | |
630 | ||
631 | return err; | |
632 | } | |
633 | ||
634 | /** | |
635 | * ixgb_close - Disables a network interface | |
636 | * @netdev: network interface device structure | |
637 | * | |
638 | * Returns 0, this is not allowed to fail | |
639 | * | |
640 | * The close entry point is called when an interface is de-activated | |
641 | * by the OS. The hardware is still under the drivers control, but | |
642 | * needs to be disabled. A global MAC reset is issued to stop the | |
643 | * hardware, and all transmit and receive resources are freed. | |
644 | **/ | |
645 | ||
646 | static int | |
647 | ixgb_close(struct net_device *netdev) | |
648 | { | |
8908c6cd | 649 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 650 | |
446490ca | 651 | ixgb_down(adapter, true); |
1da177e4 LT |
652 | |
653 | ixgb_free_tx_resources(adapter); | |
654 | ixgb_free_rx_resources(adapter); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | /** | |
660 | * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) | |
661 | * @adapter: board private structure | |
662 | * | |
663 | * Return 0 on success, negative on failure | |
664 | **/ | |
665 | ||
666 | int | |
667 | ixgb_setup_tx_resources(struct ixgb_adapter *adapter) | |
668 | { | |
669 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
670 | struct pci_dev *pdev = adapter->pdev; | |
671 | int size; | |
672 | ||
673 | size = sizeof(struct ixgb_buffer) * txdr->count; | |
89bf67f1 | 674 | txdr->buffer_info = vzalloc(size); |
03f83041 | 675 | if (!txdr->buffer_info) { |
6909c66d JP |
676 | netif_err(adapter, probe, adapter->netdev, |
677 | "Unable to allocate transmit descriptor ring memory\n"); | |
1da177e4 LT |
678 | return -ENOMEM; |
679 | } | |
1da177e4 LT |
680 | |
681 | /* round up to nearest 4K */ | |
682 | ||
683 | txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); | |
55e924cf | 684 | txdr->size = ALIGN(txdr->size, 4096); |
1da177e4 | 685 | |
47631f85 NN |
686 | txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
687 | GFP_KERNEL); | |
03f83041 | 688 | if (!txdr->desc) { |
1da177e4 | 689 | vfree(txdr->buffer_info); |
6909c66d JP |
690 | netif_err(adapter, probe, adapter->netdev, |
691 | "Unable to allocate transmit descriptor memory\n"); | |
1da177e4 LT |
692 | return -ENOMEM; |
693 | } | |
694 | memset(txdr->desc, 0, txdr->size); | |
695 | ||
696 | txdr->next_to_use = 0; | |
697 | txdr->next_to_clean = 0; | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | /** | |
703 | * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. | |
704 | * @adapter: board private structure | |
705 | * | |
706 | * Configure the Tx unit of the MAC after a reset. | |
707 | **/ | |
708 | ||
709 | static void | |
710 | ixgb_configure_tx(struct ixgb_adapter *adapter) | |
711 | { | |
222441a6 JP |
712 | u64 tdba = adapter->tx_ring.dma; |
713 | u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); | |
714 | u32 tctl; | |
1da177e4 LT |
715 | struct ixgb_hw *hw = &adapter->hw; |
716 | ||
0060c072 JB |
717 | /* Setup the Base and Length of the Tx Descriptor Ring |
718 | * tx_ring.dma can be either a 32 or 64 bit value | |
1da177e4 LT |
719 | */ |
720 | ||
721 | IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); | |
722 | IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); | |
723 | ||
724 | IXGB_WRITE_REG(hw, TDLEN, tdlen); | |
725 | ||
726 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
727 | ||
728 | IXGB_WRITE_REG(hw, TDH, 0); | |
729 | IXGB_WRITE_REG(hw, TDT, 0); | |
730 | ||
731 | /* don't set up txdctl, it induces performance problems if configured | |
732 | * incorrectly */ | |
733 | /* Set the Tx Interrupt Delay register */ | |
734 | ||
735 | IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); | |
736 | ||
737 | /* Program the Transmit Control Register */ | |
738 | ||
739 | tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; | |
740 | IXGB_WRITE_REG(hw, TCTL, tctl); | |
741 | ||
742 | /* Setup Transmit Descriptor Settings for this adapter */ | |
743 | adapter->tx_cmd_type = | |
0060c072 JB |
744 | IXGB_TX_DESC_TYPE | |
745 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); | |
1da177e4 LT |
746 | } |
747 | ||
748 | /** | |
749 | * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) | |
750 | * @adapter: board private structure | |
751 | * | |
752 | * Returns 0 on success, negative on failure | |
753 | **/ | |
754 | ||
755 | int | |
756 | ixgb_setup_rx_resources(struct ixgb_adapter *adapter) | |
757 | { | |
758 | struct ixgb_desc_ring *rxdr = &adapter->rx_ring; | |
759 | struct pci_dev *pdev = adapter->pdev; | |
760 | int size; | |
761 | ||
762 | size = sizeof(struct ixgb_buffer) * rxdr->count; | |
89bf67f1 | 763 | rxdr->buffer_info = vzalloc(size); |
03f83041 | 764 | if (!rxdr->buffer_info) { |
6909c66d JP |
765 | netif_err(adapter, probe, adapter->netdev, |
766 | "Unable to allocate receive descriptor ring\n"); | |
1da177e4 LT |
767 | return -ENOMEM; |
768 | } | |
1da177e4 LT |
769 | |
770 | /* Round up to nearest 4K */ | |
771 | ||
772 | rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); | |
55e924cf | 773 | rxdr->size = ALIGN(rxdr->size, 4096); |
1da177e4 | 774 | |
47631f85 NN |
775 | rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
776 | GFP_KERNEL); | |
1da177e4 | 777 | |
03f83041 | 778 | if (!rxdr->desc) { |
1da177e4 | 779 | vfree(rxdr->buffer_info); |
6909c66d JP |
780 | netif_err(adapter, probe, adapter->netdev, |
781 | "Unable to allocate receive descriptors\n"); | |
1da177e4 LT |
782 | return -ENOMEM; |
783 | } | |
784 | memset(rxdr->desc, 0, rxdr->size); | |
785 | ||
786 | rxdr->next_to_clean = 0; | |
787 | rxdr->next_to_use = 0; | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | /** | |
793 | * ixgb_setup_rctl - configure the receive control register | |
794 | * @adapter: Board private structure | |
795 | **/ | |
796 | ||
797 | static void | |
798 | ixgb_setup_rctl(struct ixgb_adapter *adapter) | |
799 | { | |
222441a6 | 800 | u32 rctl; |
1da177e4 LT |
801 | |
802 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
803 | ||
804 | rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); | |
805 | ||
806 | rctl |= | |
0060c072 JB |
807 | IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | |
808 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | | |
1da177e4 LT |
809 | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); |
810 | ||
811 | rctl |= IXGB_RCTL_SECRC; | |
812 | ||
3f3dc0dd | 813 | if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
1da177e4 | 814 | rctl |= IXGB_RCTL_BSIZE_2048; |
3f3dc0dd | 815 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
1da177e4 | 816 | rctl |= IXGB_RCTL_BSIZE_4096; |
3f3dc0dd | 817 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
1da177e4 | 818 | rctl |= IXGB_RCTL_BSIZE_8192; |
3f3dc0dd | 819 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
1da177e4 | 820 | rctl |= IXGB_RCTL_BSIZE_16384; |
1da177e4 LT |
821 | |
822 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
823 | } | |
824 | ||
825 | /** | |
826 | * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. | |
827 | * @adapter: board private structure | |
828 | * | |
829 | * Configure the Rx unit of the MAC after a reset. | |
830 | **/ | |
831 | ||
832 | static void | |
833 | ixgb_configure_rx(struct ixgb_adapter *adapter) | |
834 | { | |
222441a6 JP |
835 | u64 rdba = adapter->rx_ring.dma; |
836 | u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); | |
1da177e4 | 837 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 JP |
838 | u32 rctl; |
839 | u32 rxcsum; | |
1da177e4 LT |
840 | |
841 | /* make sure receives are disabled while setting up the descriptors */ | |
842 | ||
843 | rctl = IXGB_READ_REG(hw, RCTL); | |
844 | IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); | |
845 | ||
846 | /* set the Receive Delay Timer Register */ | |
847 | ||
848 | IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); | |
849 | ||
850 | /* Setup the Base and Length of the Rx Descriptor Ring */ | |
851 | ||
852 | IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); | |
853 | IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); | |
854 | ||
855 | IXGB_WRITE_REG(hw, RDLEN, rdlen); | |
856 | ||
857 | /* Setup the HW Rx Head and Tail Descriptor Pointers */ | |
858 | IXGB_WRITE_REG(hw, RDH, 0); | |
859 | IXGB_WRITE_REG(hw, RDT, 0); | |
860 | ||
4360386f JB |
861 | /* due to the hardware errata with RXDCTL, we are unable to use any of |
862 | * the performance enhancing features of it without causing other | |
863 | * subtle bugs, some of the bugs could include receive length | |
864 | * corruption at high data rates (WTHRESH > 0) and/or receive | |
865 | * descriptor ring irregularites (particularly in hardware cache) */ | |
866 | IXGB_WRITE_REG(hw, RXDCTL, 0); | |
1da177e4 LT |
867 | |
868 | /* Enable Receive Checksum Offload for TCP and UDP */ | |
446490ca | 869 | if (adapter->rx_csum) { |
1da177e4 LT |
870 | rxcsum = IXGB_READ_REG(hw, RXCSUM); |
871 | rxcsum |= IXGB_RXCSUM_TUOFL; | |
872 | IXGB_WRITE_REG(hw, RXCSUM, rxcsum); | |
873 | } | |
874 | ||
875 | /* Enable Receives */ | |
876 | ||
877 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
878 | } | |
879 | ||
880 | /** | |
881 | * ixgb_free_tx_resources - Free Tx Resources | |
882 | * @adapter: board private structure | |
883 | * | |
884 | * Free all transmit software resources | |
885 | **/ | |
886 | ||
887 | void | |
888 | ixgb_free_tx_resources(struct ixgb_adapter *adapter) | |
889 | { | |
890 | struct pci_dev *pdev = adapter->pdev; | |
891 | ||
892 | ixgb_clean_tx_ring(adapter); | |
893 | ||
894 | vfree(adapter->tx_ring.buffer_info); | |
895 | adapter->tx_ring.buffer_info = NULL; | |
896 | ||
47631f85 NN |
897 | dma_free_coherent(&pdev->dev, adapter->tx_ring.size, |
898 | adapter->tx_ring.desc, adapter->tx_ring.dma); | |
1da177e4 LT |
899 | |
900 | adapter->tx_ring.desc = NULL; | |
901 | } | |
902 | ||
235949d1 | 903 | static void |
1da177e4 | 904 | ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, |
0060c072 | 905 | struct ixgb_buffer *buffer_info) |
1da177e4 | 906 | { |
adeaa908 AD |
907 | if (buffer_info->dma) { |
908 | if (buffer_info->mapped_as_page) | |
47631f85 NN |
909 | dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
910 | buffer_info->length, DMA_TO_DEVICE); | |
adeaa908 | 911 | else |
47631f85 NN |
912 | dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
913 | buffer_info->length, DMA_TO_DEVICE); | |
adeaa908 AD |
914 | buffer_info->dma = 0; |
915 | } | |
916 | ||
fe52eeb8 | 917 | if (buffer_info->skb) { |
fe52eeb8 AD |
918 | dev_kfree_skb_any(buffer_info->skb); |
919 | buffer_info->skb = NULL; | |
920 | } | |
1dfdd7df AK |
921 | buffer_info->time_stamp = 0; |
922 | /* these fields must always be initialized in tx | |
923 | * buffer_info->length = 0; | |
924 | * buffer_info->next_to_watch = 0; */ | |
1da177e4 LT |
925 | } |
926 | ||
927 | /** | |
928 | * ixgb_clean_tx_ring - Free Tx Buffers | |
929 | * @adapter: board private structure | |
930 | **/ | |
931 | ||
932 | static void | |
933 | ixgb_clean_tx_ring(struct ixgb_adapter *adapter) | |
934 | { | |
935 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
936 | struct ixgb_buffer *buffer_info; | |
937 | unsigned long size; | |
938 | unsigned int i; | |
939 | ||
940 | /* Free all the Tx ring sk_buffs */ | |
941 | ||
1459336d | 942 | for (i = 0; i < tx_ring->count; i++) { |
1da177e4 LT |
943 | buffer_info = &tx_ring->buffer_info[i]; |
944 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
945 | } | |
946 | ||
947 | size = sizeof(struct ixgb_buffer) * tx_ring->count; | |
948 | memset(tx_ring->buffer_info, 0, size); | |
949 | ||
950 | /* Zero out the descriptor ring */ | |
951 | ||
952 | memset(tx_ring->desc, 0, tx_ring->size); | |
953 | ||
954 | tx_ring->next_to_use = 0; | |
955 | tx_ring->next_to_clean = 0; | |
956 | ||
957 | IXGB_WRITE_REG(&adapter->hw, TDH, 0); | |
958 | IXGB_WRITE_REG(&adapter->hw, TDT, 0); | |
959 | } | |
960 | ||
961 | /** | |
962 | * ixgb_free_rx_resources - Free Rx Resources | |
963 | * @adapter: board private structure | |
964 | * | |
965 | * Free all receive software resources | |
966 | **/ | |
967 | ||
968 | void | |
969 | ixgb_free_rx_resources(struct ixgb_adapter *adapter) | |
970 | { | |
971 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
972 | struct pci_dev *pdev = adapter->pdev; | |
973 | ||
974 | ixgb_clean_rx_ring(adapter); | |
975 | ||
976 | vfree(rx_ring->buffer_info); | |
977 | rx_ring->buffer_info = NULL; | |
978 | ||
47631f85 NN |
979 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
980 | rx_ring->dma); | |
1da177e4 LT |
981 | |
982 | rx_ring->desc = NULL; | |
983 | } | |
984 | ||
985 | /** | |
986 | * ixgb_clean_rx_ring - Free Rx Buffers | |
987 | * @adapter: board private structure | |
988 | **/ | |
989 | ||
990 | static void | |
991 | ixgb_clean_rx_ring(struct ixgb_adapter *adapter) | |
992 | { | |
993 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
994 | struct ixgb_buffer *buffer_info; | |
995 | struct pci_dev *pdev = adapter->pdev; | |
996 | unsigned long size; | |
997 | unsigned int i; | |
998 | ||
999 | /* Free all the Rx ring sk_buffs */ | |
1000 | ||
1459336d | 1001 | for (i = 0; i < rx_ring->count; i++) { |
1da177e4 | 1002 | buffer_info = &rx_ring->buffer_info[i]; |
23e55a32 | 1003 | if (buffer_info->dma) { |
47631f85 | 1004 | dma_unmap_single(&pdev->dev, |
1da177e4 LT |
1005 | buffer_info->dma, |
1006 | buffer_info->length, | |
47631f85 | 1007 | DMA_FROM_DEVICE); |
23e55a32 BJ |
1008 | buffer_info->dma = 0; |
1009 | buffer_info->length = 0; | |
1010 | } | |
1da177e4 | 1011 | |
23e55a32 | 1012 | if (buffer_info->skb) { |
1da177e4 | 1013 | dev_kfree_skb(buffer_info->skb); |
1da177e4 LT |
1014 | buffer_info->skb = NULL; |
1015 | } | |
1016 | } | |
1017 | ||
1018 | size = sizeof(struct ixgb_buffer) * rx_ring->count; | |
1019 | memset(rx_ring->buffer_info, 0, size); | |
1020 | ||
1021 | /* Zero out the descriptor ring */ | |
1022 | ||
1023 | memset(rx_ring->desc, 0, rx_ring->size); | |
1024 | ||
1025 | rx_ring->next_to_clean = 0; | |
1026 | rx_ring->next_to_use = 0; | |
1027 | ||
1028 | IXGB_WRITE_REG(&adapter->hw, RDH, 0); | |
1029 | IXGB_WRITE_REG(&adapter->hw, RDT, 0); | |
1030 | } | |
1031 | ||
1032 | /** | |
1033 | * ixgb_set_mac - Change the Ethernet Address of the NIC | |
1034 | * @netdev: network interface device structure | |
1035 | * @p: pointer to an address structure | |
1036 | * | |
1037 | * Returns 0 on success, negative on failure | |
1038 | **/ | |
1039 | ||
1040 | static int | |
1041 | ixgb_set_mac(struct net_device *netdev, void *p) | |
1042 | { | |
8908c6cd | 1043 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1044 | struct sockaddr *addr = p; |
1045 | ||
03f83041 | 1046 | if (!is_valid_ether_addr(addr->sa_data)) |
1da177e4 LT |
1047 | return -EADDRNOTAVAIL; |
1048 | ||
1049 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1050 | ||
1051 | ixgb_rar_set(&adapter->hw, addr->sa_data, 0); | |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | /** | |
1057 | * ixgb_set_multi - Multicast and Promiscuous mode set | |
1058 | * @netdev: network interface device structure | |
1059 | * | |
1060 | * The set_multi entry point is called whenever the multicast address | |
1061 | * list or the network interface flags are updated. This routine is | |
1062 | * responsible for configuring the hardware for proper multicast, | |
1063 | * promiscuous mode, and all-multi behavior. | |
1064 | **/ | |
1065 | ||
1066 | static void | |
1067 | ixgb_set_multi(struct net_device *netdev) | |
1068 | { | |
8908c6cd | 1069 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1070 | struct ixgb_hw *hw = &adapter->hw; |
22bedad3 | 1071 | struct netdev_hw_addr *ha; |
222441a6 | 1072 | u32 rctl; |
1da177e4 LT |
1073 | int i; |
1074 | ||
1075 | /* Check for Promiscuous and All Multicast modes */ | |
1076 | ||
1077 | rctl = IXGB_READ_REG(hw, RCTL); | |
1078 | ||
03f83041 | 1079 | if (netdev->flags & IFF_PROMISC) { |
1da177e4 | 1080 | rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); |
ae54496f ET |
1081 | /* disable VLAN filtering */ |
1082 | rctl &= ~IXGB_RCTL_CFIEN; | |
746b9f02 | 1083 | rctl &= ~IXGB_RCTL_VFE; |
1da177e4 | 1084 | } else { |
746b9f02 PM |
1085 | if (netdev->flags & IFF_ALLMULTI) { |
1086 | rctl |= IXGB_RCTL_MPE; | |
1087 | rctl &= ~IXGB_RCTL_UPE; | |
1088 | } else { | |
1089 | rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); | |
1090 | } | |
ae54496f | 1091 | /* enable VLAN filtering */ |
78ed11a5 | 1092 | rctl |= IXGB_RCTL_VFE; |
ae54496f | 1093 | rctl &= ~IXGB_RCTL_CFIEN; |
1da177e4 LT |
1094 | } |
1095 | ||
4cd24eaf | 1096 | if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { |
1da177e4 LT |
1097 | rctl |= IXGB_RCTL_MPE; |
1098 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1099 | } else { | |
222441a6 | 1100 | u8 mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES * |
273dc74e | 1101 | IXGB_ETH_LENGTH_OF_ADDRESS]; |
1da177e4 LT |
1102 | |
1103 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1104 | ||
48e2f183 | 1105 | i = 0; |
22bedad3 | 1106 | netdev_for_each_mc_addr(ha, netdev) |
48e2f183 | 1107 | memcpy(&mta[i++ * IXGB_ETH_LENGTH_OF_ADDRESS], |
22bedad3 | 1108 | ha->addr, IXGB_ETH_LENGTH_OF_ADDRESS); |
1da177e4 | 1109 | |
4cd24eaf | 1110 | ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); |
1da177e4 | 1111 | } |
ae54496f ET |
1112 | |
1113 | if (netdev->features & NETIF_F_HW_VLAN_RX) | |
1114 | ixgb_vlan_strip_enable(adapter); | |
1115 | else | |
1116 | ixgb_vlan_strip_disable(adapter); | |
1117 | ||
1da177e4 LT |
1118 | } |
1119 | ||
1120 | /** | |
1121 | * ixgb_watchdog - Timer Call-back | |
1122 | * @data: pointer to netdev cast into an unsigned long | |
1123 | **/ | |
1124 | ||
1125 | static void | |
1126 | ixgb_watchdog(unsigned long data) | |
1127 | { | |
1128 | struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; | |
1129 | struct net_device *netdev = adapter->netdev; | |
1130 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
1131 | ||
1132 | ixgb_check_for_link(&adapter->hw); | |
1133 | ||
1134 | if (ixgb_check_for_bad_link(&adapter->hw)) { | |
1135 | /* force the reset path */ | |
1136 | netif_stop_queue(netdev); | |
1137 | } | |
1138 | ||
03f83041 JB |
1139 | if (adapter->hw.link_up) { |
1140 | if (!netif_carrier_ok(netdev)) { | |
d328bc83 JP |
1141 | netdev_info(netdev, |
1142 | "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n", | |
1143 | (adapter->hw.fc.type == ixgb_fc_full) ? | |
1144 | "RX/TX" : | |
1145 | (adapter->hw.fc.type == ixgb_fc_rx_pause) ? | |
1146 | "RX" : | |
1147 | (adapter->hw.fc.type == ixgb_fc_tx_pause) ? | |
1148 | "TX" : "None"); | |
1da177e4 LT |
1149 | adapter->link_speed = 10000; |
1150 | adapter->link_duplex = FULL_DUPLEX; | |
1151 | netif_carrier_on(netdev); | |
1da177e4 LT |
1152 | } |
1153 | } else { | |
03f83041 | 1154 | if (netif_carrier_ok(netdev)) { |
1da177e4 LT |
1155 | adapter->link_speed = 0; |
1156 | adapter->link_duplex = 0; | |
d328bc83 | 1157 | netdev_info(netdev, "NIC Link is Down\n"); |
1da177e4 | 1158 | netif_carrier_off(netdev); |
1da177e4 LT |
1159 | } |
1160 | } | |
1161 | ||
1162 | ixgb_update_stats(adapter); | |
1163 | ||
03f83041 JB |
1164 | if (!netif_carrier_ok(netdev)) { |
1165 | if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { | |
1da177e4 LT |
1166 | /* We've lost link, so the controller stops DMA, |
1167 | * but we've got queued Tx work that's never going | |
1168 | * to get done, so reset controller to flush Tx. | |
1169 | * (Do the reset outside of interrupt context). */ | |
1170 | schedule_work(&adapter->tx_timeout_task); | |
c2d5ab49 JB |
1171 | /* return immediately since reset is imminent */ |
1172 | return; | |
1da177e4 LT |
1173 | } |
1174 | } | |
1175 | ||
1176 | /* Force detection of hung controller every watchdog period */ | |
446490ca | 1177 | adapter->detect_tx_hung = true; |
1da177e4 LT |
1178 | |
1179 | /* generate an interrupt to force clean up of any stragglers */ | |
1180 | IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); | |
1181 | ||
1182 | /* Reset the timer */ | |
1183 | mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); | |
1184 | } | |
1185 | ||
1186 | #define IXGB_TX_FLAGS_CSUM 0x00000001 | |
1187 | #define IXGB_TX_FLAGS_VLAN 0x00000002 | |
1188 | #define IXGB_TX_FLAGS_TSO 0x00000004 | |
1189 | ||
235949d1 | 1190 | static int |
1da177e4 LT |
1191 | ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1192 | { | |
1da177e4 LT |
1193 | struct ixgb_context_desc *context_desc; |
1194 | unsigned int i; | |
222441a6 JP |
1195 | u8 ipcss, ipcso, tucss, tucso, hdr_len; |
1196 | u16 ipcse, tucse, mss; | |
1da177e4 LT |
1197 | int err; |
1198 | ||
89114afd | 1199 | if (likely(skb_is_gso(skb))) { |
adc54139 | 1200 | struct ixgb_buffer *buffer_info; |
eddc9ec5 ACM |
1201 | struct iphdr *iph; |
1202 | ||
1da177e4 LT |
1203 | if (skb_header_cloned(skb)) { |
1204 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1205 | if (err) | |
1206 | return err; | |
1207 | } | |
1208 | ||
ab6a5bb6 | 1209 | hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
7967168c | 1210 | mss = skb_shinfo(skb)->gso_size; |
eddc9ec5 ACM |
1211 | iph = ip_hdr(skb); |
1212 | iph->tot_len = 0; | |
1213 | iph->check = 0; | |
aa8223c7 ACM |
1214 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
1215 | iph->daddr, 0, | |
1216 | IPPROTO_TCP, 0); | |
bbe735e4 | 1217 | ipcss = skb_network_offset(skb); |
eddc9ec5 | 1218 | ipcso = (void *)&(iph->check) - (void *)skb->data; |
ea2ae17d ACM |
1219 | ipcse = skb_transport_offset(skb) - 1; |
1220 | tucss = skb_transport_offset(skb); | |
aa8223c7 | 1221 | tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
1da177e4 LT |
1222 | tucse = 0; |
1223 | ||
1224 | i = adapter->tx_ring.next_to_use; | |
1225 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1226 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1227 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1228 | |
1229 | context_desc->ipcss = ipcss; | |
1230 | context_desc->ipcso = ipcso; | |
1231 | context_desc->ipcse = cpu_to_le16(ipcse); | |
1232 | context_desc->tucss = tucss; | |
1233 | context_desc->tucso = tucso; | |
1234 | context_desc->tucse = cpu_to_le16(tucse); | |
1235 | context_desc->mss = cpu_to_le16(mss); | |
1236 | context_desc->hdr_len = hdr_len; | |
1237 | context_desc->status = 0; | |
1238 | context_desc->cmd_type_len = cpu_to_le32( | |
0060c072 | 1239 | IXGB_CONTEXT_DESC_TYPE |
1da177e4 LT |
1240 | | IXGB_CONTEXT_DESC_CMD_TSE |
1241 | | IXGB_CONTEXT_DESC_CMD_IP | |
1242 | | IXGB_CONTEXT_DESC_CMD_TCP | |
1da177e4 LT |
1243 | | IXGB_CONTEXT_DESC_CMD_IDE |
1244 | | (skb->len - (hdr_len))); | |
1245 | ||
06c2f9ec | 1246 | |
03f83041 | 1247 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1248 | adapter->tx_ring.next_to_use = i; |
1249 | ||
1250 | return 1; | |
1251 | } | |
1da177e4 LT |
1252 | |
1253 | return 0; | |
1254 | } | |
1255 | ||
446490ca | 1256 | static bool |
1da177e4 LT |
1257 | ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) |
1258 | { | |
1259 | struct ixgb_context_desc *context_desc; | |
1260 | unsigned int i; | |
222441a6 | 1261 | u8 css, cso; |
1da177e4 | 1262 | |
03f83041 | 1263 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { |
adc54139 | 1264 | struct ixgb_buffer *buffer_info; |
0d0b1672 | 1265 | css = skb_checksum_start_offset(skb); |
ff1dcadb | 1266 | cso = css + skb->csum_offset; |
1da177e4 LT |
1267 | |
1268 | i = adapter->tx_ring.next_to_use; | |
1269 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
adc54139 JB |
1270 | buffer_info = &adapter->tx_ring.buffer_info[i]; |
1271 | WARN_ON(buffer_info->dma != 0); | |
1da177e4 LT |
1272 | |
1273 | context_desc->tucss = css; | |
1274 | context_desc->tucso = cso; | |
1275 | context_desc->tucse = 0; | |
1276 | /* zero out any previously existing data in one instruction */ | |
222441a6 | 1277 | *(u32 *)&(context_desc->ipcss) = 0; |
1da177e4 LT |
1278 | context_desc->status = 0; |
1279 | context_desc->hdr_len = 0; | |
1280 | context_desc->mss = 0; | |
1281 | context_desc->cmd_type_len = | |
1282 | cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | |
06c2f9ec | 1283 | | IXGB_TX_DESC_CMD_IDE); |
1da177e4 | 1284 | |
03f83041 | 1285 | if (++i == adapter->tx_ring.count) i = 0; |
1da177e4 LT |
1286 | adapter->tx_ring.next_to_use = i; |
1287 | ||
446490ca | 1288 | return true; |
1da177e4 LT |
1289 | } |
1290 | ||
446490ca | 1291 | return false; |
1da177e4 LT |
1292 | } |
1293 | ||
1294 | #define IXGB_MAX_TXD_PWR 14 | |
1295 | #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) | |
1296 | ||
235949d1 | 1297 | static int |
1da177e4 LT |
1298 | ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, |
1299 | unsigned int first) | |
1300 | { | |
1301 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
adeaa908 | 1302 | struct pci_dev *pdev = adapter->pdev; |
1da177e4 | 1303 | struct ixgb_buffer *buffer_info; |
fe52eeb8 | 1304 | int len = skb_headlen(skb); |
1da177e4 | 1305 | unsigned int offset = 0, size, count = 0, i; |
5d927853 | 1306 | unsigned int mss = skb_shinfo(skb)->gso_size; |
1da177e4 LT |
1307 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; |
1308 | unsigned int f; | |
1da177e4 LT |
1309 | |
1310 | i = tx_ring->next_to_use; | |
1311 | ||
9a432992 | 1312 | while (len) { |
1da177e4 | 1313 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1314 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1315 | /* Workaround for premature desc write-backs |
1316 | * in TSO mode. Append 4-byte sentinel desc */ | |
1317 | if (unlikely(mss && !nr_frags && size == len && size > 8)) | |
1318 | size -= 4; | |
1319 | ||
1da177e4 | 1320 | buffer_info->length = size; |
adc54139 | 1321 | WARN_ON(buffer_info->dma != 0); |
34336635 | 1322 | buffer_info->time_stamp = jiffies; |
adeaa908 | 1323 | buffer_info->mapped_as_page = false; |
47631f85 NN |
1324 | buffer_info->dma = dma_map_single(&pdev->dev, |
1325 | skb->data + offset, | |
1326 | size, DMA_TO_DEVICE); | |
1327 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
adeaa908 | 1328 | goto dma_error; |
1dfdd7df | 1329 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1330 | |
1331 | len -= size; | |
1332 | offset += size; | |
1333 | count++; | |
fe52eeb8 AD |
1334 | if (len) { |
1335 | i++; | |
1336 | if (i == tx_ring->count) | |
1337 | i = 0; | |
1338 | } | |
1da177e4 LT |
1339 | } |
1340 | ||
1459336d | 1341 | for (f = 0; f < nr_frags; f++) { |
1da177e4 LT |
1342 | struct skb_frag_struct *frag; |
1343 | ||
1344 | frag = &skb_shinfo(skb)->frags[f]; | |
1345 | len = frag->size; | |
adeaa908 | 1346 | offset = frag->page_offset; |
1da177e4 | 1347 | |
9a432992 | 1348 | while (len) { |
fe52eeb8 AD |
1349 | i++; |
1350 | if (i == tx_ring->count) | |
1351 | i = 0; | |
1352 | ||
1da177e4 | 1353 | buffer_info = &tx_ring->buffer_info[i]; |
709cf018 | 1354 | size = min(len, IXGB_MAX_DATA_PER_TXD); |
5d927853 JB |
1355 | |
1356 | /* Workaround for premature desc write-backs | |
1357 | * in TSO mode. Append 4-byte sentinel desc */ | |
19abe86d AK |
1358 | if (unlikely(mss && (f == (nr_frags - 1)) |
1359 | && size == len && size > 8)) | |
5d927853 JB |
1360 | size -= 4; |
1361 | ||
1da177e4 | 1362 | buffer_info->length = size; |
34336635 | 1363 | buffer_info->time_stamp = jiffies; |
adeaa908 AD |
1364 | buffer_info->mapped_as_page = true; |
1365 | buffer_info->dma = | |
47631f85 NN |
1366 | dma_map_page(&pdev->dev, frag->page, |
1367 | offset, size, DMA_TO_DEVICE); | |
1368 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
adeaa908 | 1369 | goto dma_error; |
1dfdd7df | 1370 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1371 | |
1372 | len -= size; | |
1373 | offset += size; | |
1374 | count++; | |
1da177e4 LT |
1375 | } |
1376 | } | |
1da177e4 LT |
1377 | tx_ring->buffer_info[i].skb = skb; |
1378 | tx_ring->buffer_info[first].next_to_watch = i; | |
1379 | ||
1380 | return count; | |
adeaa908 AD |
1381 | |
1382 | dma_error: | |
1383 | dev_err(&pdev->dev, "TX DMA map failed\n"); | |
1384 | buffer_info->dma = 0; | |
c1fa347f | 1385 | if (count) |
adeaa908 | 1386 | count--; |
c1fa347f RK |
1387 | |
1388 | while (count--) { | |
1389 | if (i==0) | |
adeaa908 | 1390 | i += tx_ring->count; |
c1fa347f | 1391 | i--; |
adeaa908 AD |
1392 | buffer_info = &tx_ring->buffer_info[i]; |
1393 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1394 | } | |
1395 | ||
1396 | return 0; | |
1da177e4 LT |
1397 | } |
1398 | ||
235949d1 | 1399 | static void |
1da177e4 LT |
1400 | ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) |
1401 | { | |
1402 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1403 | struct ixgb_tx_desc *tx_desc = NULL; | |
1404 | struct ixgb_buffer *buffer_info; | |
222441a6 JP |
1405 | u32 cmd_type_len = adapter->tx_cmd_type; |
1406 | u8 status = 0; | |
1407 | u8 popts = 0; | |
1da177e4 LT |
1408 | unsigned int i; |
1409 | ||
03f83041 | 1410 | if (tx_flags & IXGB_TX_FLAGS_TSO) { |
1da177e4 LT |
1411 | cmd_type_len |= IXGB_TX_DESC_CMD_TSE; |
1412 | popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); | |
1413 | } | |
1414 | ||
03f83041 | 1415 | if (tx_flags & IXGB_TX_FLAGS_CSUM) |
1da177e4 LT |
1416 | popts |= IXGB_TX_DESC_POPTS_TXSM; |
1417 | ||
03f83041 | 1418 | if (tx_flags & IXGB_TX_FLAGS_VLAN) |
1da177e4 | 1419 | cmd_type_len |= IXGB_TX_DESC_CMD_VLE; |
1da177e4 LT |
1420 | |
1421 | i = tx_ring->next_to_use; | |
1422 | ||
9a432992 | 1423 | while (count--) { |
1da177e4 LT |
1424 | buffer_info = &tx_ring->buffer_info[i]; |
1425 | tx_desc = IXGB_TX_DESC(*tx_ring, i); | |
1426 | tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); | |
1427 | tx_desc->cmd_type_len = | |
1428 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
1429 | tx_desc->status = status; | |
1430 | tx_desc->popts = popts; | |
1431 | tx_desc->vlan = cpu_to_le16(vlan_id); | |
1432 | ||
03f83041 | 1433 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1434 | } |
1435 | ||
0060c072 JB |
1436 | tx_desc->cmd_type_len |= |
1437 | cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); | |
1da177e4 LT |
1438 | |
1439 | /* Force memory writes to complete before letting h/w | |
1440 | * know there are new descriptors to fetch. (Only | |
1441 | * applicable for weak-ordered memory model archs, | |
1442 | * such as IA-64). */ | |
1443 | wmb(); | |
1444 | ||
1445 | tx_ring->next_to_use = i; | |
1446 | IXGB_WRITE_REG(&adapter->hw, TDT, i); | |
1447 | } | |
1448 | ||
dfd341e4 JB |
1449 | static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) |
1450 | { | |
1451 | struct ixgb_adapter *adapter = netdev_priv(netdev); | |
1452 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1453 | ||
1454 | netif_stop_queue(netdev); | |
1455 | /* Herbert's original patch had: | |
1456 | * smp_mb__after_netif_stop_queue(); | |
1457 | * but since that doesn't exist yet, just open code it. */ | |
1458 | smp_mb(); | |
1459 | ||
1460 | /* We need to check again in a case another CPU has just | |
1461 | * made room available. */ | |
1462 | if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) | |
1463 | return -EBUSY; | |
1464 | ||
1465 | /* A reprieve! */ | |
1466 | netif_start_queue(netdev); | |
1467 | ++adapter->restart_queue; | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | static int ixgb_maybe_stop_tx(struct net_device *netdev, | |
1472 | struct ixgb_desc_ring *tx_ring, int size) | |
1473 | { | |
1474 | if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) | |
1475 | return 0; | |
1476 | return __ixgb_maybe_stop_tx(netdev, size); | |
1477 | } | |
1478 | ||
1479 | ||
1da177e4 LT |
1480 | /* Tx Descriptors needed, worst case */ |
1481 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ | |
1482 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | |
5d927853 JB |
1483 | #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ |
1484 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ | |
1485 | + 1 /* one more needed for sentinel TSO workaround */ | |
1da177e4 | 1486 | |
3b29a56d | 1487 | static netdev_tx_t |
1da177e4 LT |
1488 | ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
1489 | { | |
8908c6cd | 1490 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1491 | unsigned int first; |
1492 | unsigned int tx_flags = 0; | |
1da177e4 | 1493 | int vlan_id = 0; |
fe52eeb8 | 1494 | int count = 0; |
1da177e4 LT |
1495 | int tso; |
1496 | ||
bab2bce7 JB |
1497 | if (test_bit(__IXGB_DOWN, &adapter->flags)) { |
1498 | dev_kfree_skb(skb); | |
1499 | return NETDEV_TX_OK; | |
1500 | } | |
1501 | ||
03f83041 | 1502 | if (skb->len <= 0) { |
c2199340 | 1503 | dev_kfree_skb(skb); |
6ed10654 | 1504 | return NETDEV_TX_OK; |
1da177e4 LT |
1505 | } |
1506 | ||
dfd341e4 | 1507 | if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
db582944 | 1508 | DESC_NEEDED))) |
f017f14b | 1509 | return NETDEV_TX_BUSY; |
1da177e4 | 1510 | |
03f83041 | 1511 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
1da177e4 LT |
1512 | tx_flags |= IXGB_TX_FLAGS_VLAN; |
1513 | vlan_id = vlan_tx_tag_get(skb); | |
1514 | } | |
1515 | ||
1516 | first = adapter->tx_ring.next_to_use; | |
0060c072 | 1517 | |
1da177e4 LT |
1518 | tso = ixgb_tso(adapter, skb); |
1519 | if (tso < 0) { | |
c2199340 | 1520 | dev_kfree_skb(skb); |
1da177e4 LT |
1521 | return NETDEV_TX_OK; |
1522 | } | |
1523 | ||
96f9c2e2 | 1524 | if (likely(tso)) |
1da177e4 | 1525 | tx_flags |= IXGB_TX_FLAGS_TSO; |
03f83041 | 1526 | else if (ixgb_tx_csum(adapter, skb)) |
1da177e4 LT |
1527 | tx_flags |= IXGB_TX_FLAGS_CSUM; |
1528 | ||
fe52eeb8 | 1529 | count = ixgb_tx_map(adapter, skb, first); |
1da177e4 | 1530 | |
fe52eeb8 AD |
1531 | if (count) { |
1532 | ixgb_tx_queue(adapter, count, vlan_id, tx_flags); | |
fe52eeb8 AD |
1533 | /* Make sure there is space in the ring for the next send. */ |
1534 | ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); | |
1da177e4 | 1535 | |
fe52eeb8 AD |
1536 | } else { |
1537 | dev_kfree_skb_any(skb); | |
1538 | adapter->tx_ring.buffer_info[first].time_stamp = 0; | |
1539 | adapter->tx_ring.next_to_use = first; | |
1540 | } | |
f017f14b | 1541 | |
f017f14b | 1542 | return NETDEV_TX_OK; |
1da177e4 LT |
1543 | } |
1544 | ||
1545 | /** | |
1546 | * ixgb_tx_timeout - Respond to a Tx Hang | |
1547 | * @netdev: network interface device structure | |
1548 | **/ | |
1549 | ||
1550 | static void | |
1551 | ixgb_tx_timeout(struct net_device *netdev) | |
1552 | { | |
8908c6cd | 1553 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1554 | |
1555 | /* Do the reset outside of interrupt context */ | |
1556 | schedule_work(&adapter->tx_timeout_task); | |
1557 | } | |
1558 | ||
1559 | static void | |
c4028958 | 1560 | ixgb_tx_timeout_task(struct work_struct *work) |
1da177e4 | 1561 | { |
c4028958 DH |
1562 | struct ixgb_adapter *adapter = |
1563 | container_of(work, struct ixgb_adapter, tx_timeout_task); | |
1da177e4 | 1564 | |
9b8118df | 1565 | adapter->tx_timeout_count++; |
446490ca | 1566 | ixgb_down(adapter, true); |
1da177e4 LT |
1567 | ixgb_up(adapter); |
1568 | } | |
1569 | ||
1570 | /** | |
1571 | * ixgb_get_stats - Get System Network Statistics | |
1572 | * @netdev: network interface device structure | |
1573 | * | |
1574 | * Returns the address of the device statistics structure. | |
1575 | * The statistics are actually updated from the timer callback. | |
1576 | **/ | |
1577 | ||
1578 | static struct net_device_stats * | |
1579 | ixgb_get_stats(struct net_device *netdev) | |
1580 | { | |
0cdc0369 | 1581 | return &netdev->stats; |
1da177e4 LT |
1582 | } |
1583 | ||
1584 | /** | |
1585 | * ixgb_change_mtu - Change the Maximum Transfer Unit | |
1586 | * @netdev: network interface device structure | |
1587 | * @new_mtu: new value for maximum frame size | |
1588 | * | |
1589 | * Returns 0 on success, negative on failure | |
1590 | **/ | |
1591 | ||
1592 | static int | |
1593 | ixgb_change_mtu(struct net_device *netdev, int new_mtu) | |
1594 | { | |
8908c6cd | 1595 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1596 | int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
1597 | int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; | |
1598 | ||
a65a604a JB |
1599 | /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ |
1600 | if ((new_mtu < 68) || | |
1601 | (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { | |
6909c66d JP |
1602 | netif_err(adapter, probe, adapter->netdev, |
1603 | "Invalid MTU setting %d\n", new_mtu); | |
1da177e4 LT |
1604 | return -EINVAL; |
1605 | } | |
1606 | ||
b5ca88eb JB |
1607 | if (old_max_frame == max_frame) |
1608 | return 0; | |
1609 | ||
1610 | if (netif_running(netdev)) | |
1611 | ixgb_down(adapter, true); | |
1612 | ||
a3dc3da0 | 1613 | adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ |
1da177e4 LT |
1614 | |
1615 | netdev->mtu = new_mtu; | |
1616 | ||
b5ca88eb | 1617 | if (netif_running(netdev)) |
1da177e4 | 1618 | ixgb_up(adapter); |
1da177e4 LT |
1619 | |
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | /** | |
1624 | * ixgb_update_stats - Update the board statistics counters. | |
1625 | * @adapter: board private structure | |
1626 | **/ | |
1627 | ||
1628 | void | |
1629 | ixgb_update_stats(struct ixgb_adapter *adapter) | |
1630 | { | |
5633684d | 1631 | struct net_device *netdev = adapter->netdev; |
01748fbb LV |
1632 | struct pci_dev *pdev = adapter->pdev; |
1633 | ||
1634 | /* Prevent stats update while adapter is being reset */ | |
81b1955e | 1635 | if (pci_channel_offline(pdev)) |
01748fbb | 1636 | return; |
5633684d | 1637 | |
03f83041 | 1638 | if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || |
4cd24eaf | 1639 | (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { |
5633684d MC |
1640 | u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); |
1641 | u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); | |
1642 | u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); | |
0060c072 | 1643 | u64 bcast = ((u64)bcast_h << 32) | bcast_l; |
5633684d MC |
1644 | |
1645 | multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); | |
1646 | /* fix up multicast stats by removing broadcasts */ | |
03f83041 | 1647 | if (multi >= bcast) |
7b89178d | 1648 | multi -= bcast; |
0060c072 | 1649 | |
5633684d MC |
1650 | adapter->stats.mprcl += (multi & 0xFFFFFFFF); |
1651 | adapter->stats.mprch += (multi >> 32); | |
0060c072 | 1652 | adapter->stats.bprcl += bcast_l; |
5633684d MC |
1653 | adapter->stats.bprch += bcast_h; |
1654 | } else { | |
1655 | adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); | |
1656 | adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); | |
1657 | adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); | |
1658 | adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); | |
1659 | } | |
1da177e4 LT |
1660 | adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
1661 | adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); | |
1662 | adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); | |
1663 | adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); | |
1da177e4 LT |
1664 | adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
1665 | adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); | |
1666 | adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); | |
1667 | adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); | |
1668 | adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); | |
1669 | adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); | |
1670 | adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); | |
1671 | adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); | |
1672 | adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); | |
1673 | adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); | |
1674 | adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); | |
1675 | adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); | |
1676 | adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); | |
1677 | adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); | |
1678 | adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); | |
1679 | adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); | |
1680 | adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); | |
1681 | adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); | |
1682 | adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); | |
1683 | adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); | |
1684 | adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); | |
1685 | adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); | |
1686 | adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); | |
1687 | adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); | |
1688 | adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); | |
1689 | adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); | |
1690 | adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); | |
1691 | adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); | |
1692 | adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); | |
1693 | adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); | |
1694 | adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); | |
1695 | adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); | |
1696 | adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); | |
1697 | adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); | |
1698 | adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); | |
1699 | adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); | |
1700 | adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); | |
1701 | adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); | |
1702 | adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); | |
1703 | adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); | |
1704 | adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); | |
1705 | adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); | |
1706 | adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); | |
1707 | adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); | |
1708 | adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); | |
1709 | adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); | |
1710 | adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); | |
1711 | adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); | |
1712 | adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); | |
1713 | adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); | |
1714 | adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); | |
1715 | adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); | |
1716 | ||
1717 | /* Fill out the OS statistics structure */ | |
1718 | ||
0cdc0369 AK |
1719 | netdev->stats.rx_packets = adapter->stats.gprcl; |
1720 | netdev->stats.tx_packets = adapter->stats.gptcl; | |
1721 | netdev->stats.rx_bytes = adapter->stats.gorcl; | |
1722 | netdev->stats.tx_bytes = adapter->stats.gotcl; | |
1723 | netdev->stats.multicast = adapter->stats.mprcl; | |
1724 | netdev->stats.collisions = 0; | |
1da177e4 LT |
1725 | |
1726 | /* ignore RLEC as it reports errors for padded (<64bytes) frames | |
1727 | * with a length in the type/len field */ | |
0cdc0369 | 1728 | netdev->stats.rx_errors = |
1da177e4 LT |
1729 | /* adapter->stats.rnbc + */ adapter->stats.crcerrs + |
1730 | adapter->stats.ruc + | |
1731 | adapter->stats.roc /*+ adapter->stats.rlec */ + | |
1732 | adapter->stats.icbc + | |
1733 | adapter->stats.ecbc + adapter->stats.mpc; | |
1734 | ||
1da177e4 | 1735 | /* see above |
0cdc0369 | 1736 | * netdev->stats.rx_length_errors = adapter->stats.rlec; |
1da177e4 LT |
1737 | */ |
1738 | ||
0cdc0369 AK |
1739 | netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
1740 | netdev->stats.rx_fifo_errors = adapter->stats.mpc; | |
1741 | netdev->stats.rx_missed_errors = adapter->stats.mpc; | |
1742 | netdev->stats.rx_over_errors = adapter->stats.mpc; | |
1743 | ||
1744 | netdev->stats.tx_errors = 0; | |
1745 | netdev->stats.rx_frame_errors = 0; | |
1746 | netdev->stats.tx_aborted_errors = 0; | |
1747 | netdev->stats.tx_carrier_errors = 0; | |
1748 | netdev->stats.tx_fifo_errors = 0; | |
1749 | netdev->stats.tx_heartbeat_errors = 0; | |
1750 | netdev->stats.tx_window_errors = 0; | |
1da177e4 LT |
1751 | } |
1752 | ||
1753 | #define IXGB_MAX_INTR 10 | |
1754 | /** | |
1755 | * ixgb_intr - Interrupt Handler | |
1756 | * @irq: interrupt number | |
1757 | * @data: pointer to a network interface device structure | |
1da177e4 LT |
1758 | **/ |
1759 | ||
1760 | static irqreturn_t | |
7d12e780 | 1761 | ixgb_intr(int irq, void *data) |
1da177e4 LT |
1762 | { |
1763 | struct net_device *netdev = data; | |
8908c6cd | 1764 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1765 | struct ixgb_hw *hw = &adapter->hw; |
222441a6 | 1766 | u32 icr = IXGB_READ_REG(hw, ICR); |
1da177e4 | 1767 | |
03f83041 | 1768 | if (unlikely(!icr)) |
1da177e4 LT |
1769 | return IRQ_NONE; /* Not our interrupt */ |
1770 | ||
bab2bce7 JB |
1771 | if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) |
1772 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) | |
1773 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1da177e4 | 1774 | |
288379f0 | 1775 | if (napi_schedule_prep(&adapter->napi)) { |
1da177e4 | 1776 | |
0060c072 | 1777 | /* Disable interrupts and register for poll. The flush |
1da177e4 LT |
1778 | of the posted write is intentionally left out. |
1779 | */ | |
1780 | ||
1da177e4 | 1781 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); |
288379f0 | 1782 | __napi_schedule(&adapter->napi); |
1da177e4 | 1783 | } |
1da177e4 LT |
1784 | return IRQ_HANDLED; |
1785 | } | |
1786 | ||
1da177e4 LT |
1787 | /** |
1788 | * ixgb_clean - NAPI Rx polling callback | |
1789 | * @adapter: board private structure | |
1790 | **/ | |
1791 | ||
1792 | static int | |
bea3348e | 1793 | ixgb_clean(struct napi_struct *napi, int budget) |
1da177e4 | 1794 | { |
bea3348e | 1795 | struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); |
1da177e4 LT |
1796 | int work_done = 0; |
1797 | ||
53e52c72 | 1798 | ixgb_clean_tx_irq(adapter); |
bea3348e | 1799 | ixgb_clean_rx_irq(adapter, &work_done, budget); |
1da177e4 | 1800 | |
53e52c72 DM |
1801 | /* If budget not fully consumed, exit the polling mode */ |
1802 | if (work_done < budget) { | |
288379f0 | 1803 | napi_complete(napi); |
72ab5195 JB |
1804 | if (!test_bit(__IXGB_DOWN, &adapter->flags)) |
1805 | ixgb_irq_enable(adapter); | |
1da177e4 LT |
1806 | } |
1807 | ||
bea3348e | 1808 | return work_done; |
1da177e4 | 1809 | } |
1da177e4 LT |
1810 | |
1811 | /** | |
1812 | * ixgb_clean_tx_irq - Reclaim resources after transmit completes | |
1813 | * @adapter: board private structure | |
1814 | **/ | |
1815 | ||
446490ca | 1816 | static bool |
1da177e4 LT |
1817 | ixgb_clean_tx_irq(struct ixgb_adapter *adapter) |
1818 | { | |
1819 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1820 | struct net_device *netdev = adapter->netdev; | |
1821 | struct ixgb_tx_desc *tx_desc, *eop_desc; | |
1822 | struct ixgb_buffer *buffer_info; | |
1823 | unsigned int i, eop; | |
446490ca | 1824 | bool cleaned = false; |
1da177e4 LT |
1825 | |
1826 | i = tx_ring->next_to_clean; | |
1827 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1828 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1829 | ||
9a432992 | 1830 | while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { |
1da177e4 | 1831 | |
2d0bb1c1 | 1832 | rmb(); /* read buffer_info after eop_desc */ |
446490ca | 1833 | for (cleaned = false; !cleaned; ) { |
1da177e4 LT |
1834 | tx_desc = IXGB_TX_DESC(*tx_ring, i); |
1835 | buffer_info = &tx_ring->buffer_info[i]; | |
1836 | ||
0060c072 JB |
1837 | if (tx_desc->popts & |
1838 | (IXGB_TX_DESC_POPTS_TXSM | | |
1839 | IXGB_TX_DESC_POPTS_IXSM)) | |
1da177e4 LT |
1840 | adapter->hw_csum_tx_good++; |
1841 | ||
1842 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1843 | ||
222441a6 | 1844 | *(u32 *)&(tx_desc->status) = 0; |
1da177e4 LT |
1845 | |
1846 | cleaned = (i == eop); | |
03f83041 | 1847 | if (++i == tx_ring->count) i = 0; |
1da177e4 LT |
1848 | } |
1849 | ||
1850 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1851 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1852 | } | |
1853 | ||
1854 | tx_ring->next_to_clean = i; | |
1855 | ||
0f8ecbad JB |
1856 | if (unlikely(cleaned && netif_carrier_ok(netdev) && |
1857 | IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { | |
1858 | /* Make sure that anybody stopping the queue after this | |
1859 | * sees the new next_to_clean. */ | |
1860 | smp_mb(); | |
1861 | ||
1862 | if (netif_queue_stopped(netdev) && | |
1863 | !(test_bit(__IXGB_DOWN, &adapter->flags))) { | |
3352a3b2 | 1864 | netif_wake_queue(netdev); |
0f8ecbad JB |
1865 | ++adapter->restart_queue; |
1866 | } | |
1da177e4 | 1867 | } |
1da177e4 | 1868 | |
03f83041 | 1869 | if (adapter->detect_tx_hung) { |
1da177e4 LT |
1870 | /* detect a transmit hang in hardware, this serializes the |
1871 | * check with the clearing of time_stamp and movement of i */ | |
446490ca | 1872 | adapter->detect_tx_hung = false; |
fe52eeb8 | 1873 | if (tx_ring->buffer_info[eop].time_stamp && |
9b8118df | 1874 | time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) |
1da177e4 | 1875 | && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
9b8118df AK |
1876 | IXGB_STATUS_TXOFF)) { |
1877 | /* detected Tx unit hang */ | |
6909c66d JP |
1878 | netif_err(adapter, drv, adapter->netdev, |
1879 | "Detected Tx Unit Hang\n" | |
1880 | " TDH <%x>\n" | |
1881 | " TDT <%x>\n" | |
1882 | " next_to_use <%x>\n" | |
1883 | " next_to_clean <%x>\n" | |
1884 | "buffer_info[next_to_clean]\n" | |
1885 | " time_stamp <%lx>\n" | |
1886 | " next_to_watch <%x>\n" | |
1887 | " jiffies <%lx>\n" | |
1888 | " next_to_watch.status <%x>\n", | |
1889 | IXGB_READ_REG(&adapter->hw, TDH), | |
1890 | IXGB_READ_REG(&adapter->hw, TDT), | |
1891 | tx_ring->next_to_use, | |
1892 | tx_ring->next_to_clean, | |
1893 | tx_ring->buffer_info[eop].time_stamp, | |
1894 | eop, | |
1895 | jiffies, | |
1896 | eop_desc->status); | |
1da177e4 | 1897 | netif_stop_queue(netdev); |
9b8118df | 1898 | } |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | return cleaned; | |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * ixgb_rx_checksum - Receive Checksum Offload for 82597. | |
1906 | * @adapter: board private structure | |
1907 | * @rx_desc: receive descriptor | |
1908 | * @sk_buff: socket buffer with received data | |
1909 | **/ | |
1910 | ||
235949d1 | 1911 | static void |
1da177e4 | 1912 | ixgb_rx_checksum(struct ixgb_adapter *adapter, |
0060c072 JB |
1913 | struct ixgb_rx_desc *rx_desc, |
1914 | struct sk_buff *skb) | |
1da177e4 LT |
1915 | { |
1916 | /* Ignore Checksum bit is set OR | |
1917 | * TCP Checksum has not been calculated | |
1918 | */ | |
03f83041 | 1919 | if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || |
1da177e4 | 1920 | (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { |
bc8acf2c | 1921 | skb_checksum_none_assert(skb); |
1da177e4 LT |
1922 | return; |
1923 | } | |
1924 | ||
1925 | /* At this point we know the hardware did the TCP checksum */ | |
1926 | /* now look at the TCP checksum error bit */ | |
03f83041 | 1927 | if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { |
1da177e4 | 1928 | /* let the stack verify checksum errors */ |
bc8acf2c | 1929 | skb_checksum_none_assert(skb); |
1da177e4 LT |
1930 | adapter->hw_csum_rx_error++; |
1931 | } else { | |
1932 | /* TCP checksum is good */ | |
1933 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1934 | adapter->hw_csum_rx_good++; | |
1935 | } | |
1936 | } | |
1937 | ||
57bf6eef JP |
1938 | /* |
1939 | * this should improve performance for small packets with large amounts | |
1940 | * of reassembly being done in the stack | |
1941 | */ | |
1942 | static void ixgb_check_copybreak(struct net_device *netdev, | |
1943 | struct ixgb_buffer *buffer_info, | |
1944 | u32 length, struct sk_buff **skb) | |
1945 | { | |
1946 | struct sk_buff *new_skb; | |
1947 | ||
1948 | if (length > copybreak) | |
1949 | return; | |
1950 | ||
1951 | new_skb = netdev_alloc_skb_ip_align(netdev, length); | |
1952 | if (!new_skb) | |
1953 | return; | |
1954 | ||
1955 | skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, | |
1956 | (*skb)->data - NET_IP_ALIGN, | |
1957 | length + NET_IP_ALIGN); | |
1958 | /* save the skb in buffer_info as good */ | |
1959 | buffer_info->skb = *skb; | |
1960 | *skb = new_skb; | |
1961 | } | |
1962 | ||
1da177e4 LT |
1963 | /** |
1964 | * ixgb_clean_rx_irq - Send received data up the network stack, | |
1965 | * @adapter: board private structure | |
1966 | **/ | |
1967 | ||
446490ca | 1968 | static bool |
1da177e4 | 1969 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) |
1da177e4 LT |
1970 | { |
1971 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
1972 | struct net_device *netdev = adapter->netdev; | |
1973 | struct pci_dev *pdev = adapter->pdev; | |
1974 | struct ixgb_rx_desc *rx_desc, *next_rxd; | |
1975 | struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; | |
222441a6 | 1976 | u32 length; |
1da177e4 | 1977 | unsigned int i, j; |
fc2d14e3 | 1978 | int cleaned_count = 0; |
446490ca | 1979 | bool cleaned = false; |
1da177e4 LT |
1980 | |
1981 | i = rx_ring->next_to_clean; | |
1982 | rx_desc = IXGB_RX_DESC(*rx_ring, i); | |
1983 | buffer_info = &rx_ring->buffer_info[i]; | |
1984 | ||
9a432992 | 1985 | while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { |
fc2d14e3 | 1986 | struct sk_buff *skb; |
f404de1c | 1987 | u8 status; |
1da177e4 | 1988 | |
03f83041 | 1989 | if (*work_done >= work_to_do) |
1da177e4 LT |
1990 | break; |
1991 | ||
1992 | (*work_done)++; | |
2d0bb1c1 | 1993 | rmb(); /* read descriptor and rx_buffer_info after status DD */ |
f404de1c | 1994 | status = rx_desc->status; |
1da177e4 | 1995 | skb = buffer_info->skb; |
1dfdd7df | 1996 | buffer_info->skb = NULL; |
f404de1c | 1997 | |
fc2d14e3 | 1998 | prefetch(skb->data - NET_IP_ALIGN); |
1da177e4 | 1999 | |
57bf6eef JP |
2000 | if (++i == rx_ring->count) |
2001 | i = 0; | |
1da177e4 LT |
2002 | next_rxd = IXGB_RX_DESC(*rx_ring, i); |
2003 | prefetch(next_rxd); | |
2004 | ||
57bf6eef JP |
2005 | j = i + 1; |
2006 | if (j == rx_ring->count) | |
2007 | j = 0; | |
1da177e4 LT |
2008 | next2_buffer = &rx_ring->buffer_info[j]; |
2009 | prefetch(next2_buffer); | |
2010 | ||
2011 | next_buffer = &rx_ring->buffer_info[i]; | |
1da177e4 | 2012 | |
446490ca | 2013 | cleaned = true; |
fc2d14e3 | 2014 | cleaned_count++; |
1da177e4 | 2015 | |
47631f85 | 2016 | dma_unmap_single(&pdev->dev, |
1da177e4 LT |
2017 | buffer_info->dma, |
2018 | buffer_info->length, | |
47631f85 | 2019 | DMA_FROM_DEVICE); |
fc2d14e3 | 2020 | buffer_info->dma = 0; |
1da177e4 LT |
2021 | |
2022 | length = le16_to_cpu(rx_desc->length); | |
fc2d14e3 | 2023 | rx_desc->length = 0; |
1da177e4 | 2024 | |
03f83041 | 2025 | if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
1da177e4 LT |
2026 | |
2027 | /* All receives must fit into a single buffer */ | |
2028 | ||
2029 | IXGB_DBG("Receive packet consumed multiple buffers " | |
2030 | "length<%x>\n", length); | |
2031 | ||
2032 | dev_kfree_skb_irq(skb); | |
f404de1c | 2033 | goto rxdesc_done; |
1da177e4 LT |
2034 | } |
2035 | ||
0060c072 JB |
2036 | if (unlikely(rx_desc->errors & |
2037 | (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | | |
2038 | IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { | |
1da177e4 | 2039 | dev_kfree_skb_irq(skb); |
f404de1c | 2040 | goto rxdesc_done; |
1da177e4 LT |
2041 | } |
2042 | ||
57bf6eef | 2043 | ixgb_check_copybreak(netdev, buffer_info, length, &skb); |
6b900bb4 | 2044 | |
1da177e4 LT |
2045 | /* Good Receive */ |
2046 | skb_put(skb, length); | |
2047 | ||
2048 | /* Receive Checksum Offload */ | |
2049 | ixgb_rx_checksum(adapter, rx_desc, skb); | |
2050 | ||
2051 | skb->protocol = eth_type_trans(skb, netdev); | |
03f83041 | 2052 | if (adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { |
1da177e4 | 2053 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, |
0060c072 | 2054 | le16_to_cpu(rx_desc->special)); |
1da177e4 LT |
2055 | } else { |
2056 | netif_receive_skb(skb); | |
2057 | } | |
1da177e4 | 2058 | |
f404de1c MC |
2059 | rxdesc_done: |
2060 | /* clean up descriptor, might be written over by hw */ | |
1da177e4 | 2061 | rx_desc->status = 0; |
1da177e4 | 2062 | |
fc2d14e3 JB |
2063 | /* return some buffers to hardware, one at a time is too slow */ |
2064 | if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { | |
2065 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
2066 | cleaned_count = 0; | |
2067 | } | |
2068 | ||
f404de1c | 2069 | /* use prefetched values */ |
1da177e4 LT |
2070 | rx_desc = next_rxd; |
2071 | buffer_info = next_buffer; | |
2072 | } | |
2073 | ||
2074 | rx_ring->next_to_clean = i; | |
2075 | ||
fc2d14e3 JB |
2076 | cleaned_count = IXGB_DESC_UNUSED(rx_ring); |
2077 | if (cleaned_count) | |
2078 | ixgb_alloc_rx_buffers(adapter, cleaned_count); | |
1da177e4 LT |
2079 | |
2080 | return cleaned; | |
2081 | } | |
2082 | ||
2083 | /** | |
2084 | * ixgb_alloc_rx_buffers - Replace used receive buffers | |
2085 | * @adapter: address of board private structure | |
2086 | **/ | |
2087 | ||
2088 | static void | |
fc2d14e3 | 2089 | ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) |
1da177e4 LT |
2090 | { |
2091 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
2092 | struct net_device *netdev = adapter->netdev; | |
2093 | struct pci_dev *pdev = adapter->pdev; | |
2094 | struct ixgb_rx_desc *rx_desc; | |
2095 | struct ixgb_buffer *buffer_info; | |
2096 | struct sk_buff *skb; | |
2097 | unsigned int i; | |
1da177e4 LT |
2098 | long cleancount; |
2099 | ||
2100 | i = rx_ring->next_to_use; | |
2101 | buffer_info = &rx_ring->buffer_info[i]; | |
2102 | cleancount = IXGB_DESC_UNUSED(rx_ring); | |
2103 | ||
1da177e4 | 2104 | |
41639fed | 2105 | /* leave three descriptors unused */ |
fc2d14e3 | 2106 | while (--cleancount > 2 && cleaned_count--) { |
1dfdd7df | 2107 | /* recycle! its good for you */ |
69c7a940 AK |
2108 | skb = buffer_info->skb; |
2109 | if (skb) { | |
1dfdd7df AK |
2110 | skb_trim(skb, 0); |
2111 | goto map_skb; | |
2112 | } | |
1da177e4 | 2113 | |
89d71a66 | 2114 | skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len); |
1dfdd7df | 2115 | if (unlikely(!skb)) { |
1da177e4 | 2116 | /* Better luck next round */ |
1dfdd7df | 2117 | adapter->alloc_rx_buff_failed++; |
1da177e4 LT |
2118 | break; |
2119 | } | |
2120 | ||
1da177e4 LT |
2121 | buffer_info->skb = skb; |
2122 | buffer_info->length = adapter->rx_buffer_len; | |
1dfdd7df | 2123 | map_skb: |
47631f85 | 2124 | buffer_info->dma = dma_map_single(&pdev->dev, |
1dfdd7df AK |
2125 | skb->data, |
2126 | adapter->rx_buffer_len, | |
47631f85 | 2127 | DMA_FROM_DEVICE); |
1da177e4 | 2128 | |
1dfdd7df | 2129 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
1da177e4 | 2130 | rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
41639fed | 2131 | /* guarantee DD bit not set now before h/w gets descriptor |
0060c072 | 2132 | * this is the rest of the workaround for h/w double |
41639fed MC |
2133 | * writeback. */ |
2134 | rx_desc->status = 0; | |
1da177e4 | 2135 | |
1da177e4 | 2136 | |
03f83041 | 2137 | if (++i == rx_ring->count) i = 0; |
1da177e4 LT |
2138 | buffer_info = &rx_ring->buffer_info[i]; |
2139 | } | |
2140 | ||
1dfdd7df AK |
2141 | if (likely(rx_ring->next_to_use != i)) { |
2142 | rx_ring->next_to_use = i; | |
2143 | if (unlikely(i-- == 0)) | |
2144 | i = (rx_ring->count - 1); | |
2145 | ||
2146 | /* Force memory writes to complete before letting h/w | |
2147 | * know there are new descriptors to fetch. (Only | |
2148 | * applicable for weak-ordered memory model archs, such | |
2149 | * as IA-64). */ | |
2150 | wmb(); | |
2151 | IXGB_WRITE_REG(&adapter->hw, RDT, i); | |
2152 | } | |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | /** | |
2156 | * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. | |
0060c072 | 2157 | * |
1da177e4 LT |
2158 | * @param netdev network interface device structure |
2159 | * @param grp indicates to enable or disable tagging/stripping | |
2160 | **/ | |
2161 | static void | |
2162 | ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) | |
2163 | { | |
8908c6cd | 2164 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 2165 | |
1da177e4 | 2166 | adapter->vlgrp = grp; |
ae54496f | 2167 | } |
1da177e4 | 2168 | |
ae54496f ET |
2169 | static void |
2170 | ixgb_vlan_strip_enable(struct ixgb_adapter *adapter) | |
2171 | { | |
2172 | u32 ctrl; | |
1da177e4 | 2173 | |
ae54496f ET |
2174 | /* enable VLAN tag insert/strip */ |
2175 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2176 | ctrl |= IXGB_CTRL0_VME; | |
2177 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
2178 | } | |
1da177e4 | 2179 | |
ae54496f ET |
2180 | static void |
2181 | ixgb_vlan_strip_disable(struct ixgb_adapter *adapter) | |
2182 | { | |
2183 | u32 ctrl; | |
1da177e4 | 2184 | |
ae54496f ET |
2185 | /* disable VLAN tag insert/strip */ |
2186 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2187 | ctrl &= ~IXGB_CTRL0_VME; | |
2188 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
1da177e4 LT |
2189 | } |
2190 | ||
2191 | static void | |
222441a6 | 2192 | ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2193 | { |
8908c6cd | 2194 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2195 | u32 vfta, index; |
1da177e4 LT |
2196 | |
2197 | /* add VID to filter table */ | |
2198 | ||
2199 | index = (vid >> 5) & 0x7F; | |
2200 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2201 | vfta |= (1 << (vid & 0x1F)); | |
2202 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2203 | } | |
2204 | ||
2205 | static void | |
222441a6 | 2206 | ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
1da177e4 | 2207 | { |
8908c6cd | 2208 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
222441a6 | 2209 | u32 vfta, index; |
1da177e4 LT |
2210 | |
2211 | ixgb_irq_disable(adapter); | |
2212 | ||
5c15bdec | 2213 | vlan_group_set_device(adapter->vlgrp, vid, NULL); |
1da177e4 | 2214 | |
bab2bce7 JB |
2215 | /* don't enable interrupts unless we are UP */ |
2216 | if (adapter->netdev->flags & IFF_UP) | |
2217 | ixgb_irq_enable(adapter); | |
1da177e4 | 2218 | |
bab2bce7 | 2219 | /* remove VID from filter table */ |
1da177e4 LT |
2220 | |
2221 | index = (vid >> 5) & 0x7F; | |
2222 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2223 | vfta &= ~(1 << (vid & 0x1F)); | |
2224 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2225 | } | |
2226 | ||
2227 | static void | |
2228 | ixgb_restore_vlan(struct ixgb_adapter *adapter) | |
2229 | { | |
2230 | ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); | |
2231 | ||
03f83041 | 2232 | if (adapter->vlgrp) { |
222441a6 | 2233 | u16 vid; |
b738127d | 2234 | for (vid = 0; vid < VLAN_N_VID; vid++) { |
03f83041 | 2235 | if (!vlan_group_get_device(adapter->vlgrp, vid)) |
1da177e4 LT |
2236 | continue; |
2237 | ixgb_vlan_rx_add_vid(adapter->netdev, vid); | |
2238 | } | |
2239 | } | |
2240 | } | |
2241 | ||
1da177e4 LT |
2242 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2243 | /* | |
2244 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2245 | * without having to re-enable interrupts. It's not called while | |
2246 | * the interrupt routine is executing. | |
2247 | */ | |
2248 | ||
2249 | static void ixgb_netpoll(struct net_device *dev) | |
2250 | { | |
f990b426 | 2251 | struct ixgb_adapter *adapter = netdev_priv(dev); |
ac79c82e | 2252 | |
1da177e4 | 2253 | disable_irq(adapter->pdev->irq); |
7d12e780 | 2254 | ixgb_intr(adapter->pdev->irq, dev); |
1da177e4 LT |
2255 | enable_irq(adapter->pdev->irq); |
2256 | } | |
2257 | #endif | |
2258 | ||
01748fbb LV |
2259 | /** |
2260 | * ixgb_io_error_detected() - called when PCI error is detected | |
2261 | * @pdev pointer to pci device with error | |
2262 | * @state pci channel state after error | |
2263 | * | |
2264 | * This callback is called by the PCI subsystem whenever | |
2265 | * a PCI bus error is detected. | |
2266 | */ | |
0060c072 JB |
2267 | static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, |
2268 | enum pci_channel_state state) | |
01748fbb LV |
2269 | { |
2270 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2271 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2272 | |
d6a1f83b DN |
2273 | netif_device_detach(netdev); |
2274 | ||
2275 | if (state == pci_channel_io_perm_failure) | |
2276 | return PCI_ERS_RESULT_DISCONNECT; | |
2277 | ||
03f83041 | 2278 | if (netif_running(netdev)) |
446490ca | 2279 | ixgb_down(adapter, true); |
01748fbb LV |
2280 | |
2281 | pci_disable_device(pdev); | |
2282 | ||
2283 | /* Request a slot reset. */ | |
2284 | return PCI_ERS_RESULT_NEED_RESET; | |
2285 | } | |
2286 | ||
2287 | /** | |
2288 | * ixgb_io_slot_reset - called after the pci bus has been reset. | |
2289 | * @pdev pointer to pci device with error | |
2290 | * | |
52035bdb | 2291 | * This callback is called after the PCI bus has been reset. |
01748fbb LV |
2292 | * Basically, this tries to restart the card from scratch. |
2293 | * This is a shortened version of the device probe/discovery code, | |
2294 | * it resembles the first-half of the ixgb_probe() routine. | |
2295 | */ | |
0060c072 | 2296 | static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) |
01748fbb LV |
2297 | { |
2298 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2299 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb | 2300 | |
03f83041 | 2301 | if (pci_enable_device(pdev)) { |
6909c66d JP |
2302 | netif_err(adapter, probe, adapter->netdev, |
2303 | "Cannot re-enable PCI device after reset\n"); | |
01748fbb LV |
2304 | return PCI_ERS_RESULT_DISCONNECT; |
2305 | } | |
2306 | ||
2307 | /* Perform card reset only on one instance of the card */ | |
2308 | if (0 != PCI_FUNC (pdev->devfn)) | |
2309 | return PCI_ERS_RESULT_RECOVERED; | |
2310 | ||
2311 | pci_set_master(pdev); | |
2312 | ||
2313 | netif_carrier_off(netdev); | |
2314 | netif_stop_queue(netdev); | |
2315 | ixgb_reset(adapter); | |
2316 | ||
2317 | /* Make sure the EEPROM is good */ | |
03f83041 | 2318 | if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { |
6909c66d JP |
2319 | netif_err(adapter, probe, adapter->netdev, |
2320 | "After reset, the EEPROM checksum is not valid\n"); | |
01748fbb LV |
2321 | return PCI_ERS_RESULT_DISCONNECT; |
2322 | } | |
2323 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
2324 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); | |
2325 | ||
03f83041 | 2326 | if (!is_valid_ether_addr(netdev->perm_addr)) { |
6909c66d JP |
2327 | netif_err(adapter, probe, adapter->netdev, |
2328 | "After reset, invalid MAC address\n"); | |
01748fbb LV |
2329 | return PCI_ERS_RESULT_DISCONNECT; |
2330 | } | |
2331 | ||
2332 | return PCI_ERS_RESULT_RECOVERED; | |
2333 | } | |
2334 | ||
2335 | /** | |
2336 | * ixgb_io_resume - called when its OK to resume normal operations | |
2337 | * @pdev pointer to pci device with error | |
2338 | * | |
2339 | * The error recovery driver tells us that its OK to resume | |
2340 | * normal operation. Implementation resembles the second-half | |
2341 | * of the ixgb_probe() routine. | |
2342 | */ | |
0060c072 | 2343 | static void ixgb_io_resume(struct pci_dev *pdev) |
01748fbb LV |
2344 | { |
2345 | struct net_device *netdev = pci_get_drvdata(pdev); | |
f7d4fa01 | 2346 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
01748fbb LV |
2347 | |
2348 | pci_set_master(pdev); | |
2349 | ||
03f83041 JB |
2350 | if (netif_running(netdev)) { |
2351 | if (ixgb_up(adapter)) { | |
d328bc83 | 2352 | pr_err("can't bring device back up after reset\n"); |
01748fbb LV |
2353 | return; |
2354 | } | |
2355 | } | |
2356 | ||
2357 | netif_device_attach(netdev); | |
2358 | mod_timer(&adapter->watchdog_timer, jiffies); | |
2359 | } | |
2360 | ||
1da177e4 | 2361 | /* ixgb_main.c */ |