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1da177e4 LT |
1 | /******************************************************************************* |
2 | ||
3 | ||
4 | Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 2 of the License, or (at your option) | |
9 | any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License along with | |
17 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
18 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | ||
20 | The full GNU General Public License is included in this distribution in the | |
21 | file called LICENSE. | |
22 | ||
23 | Contact Information: | |
24 | Linux NICS <linux.nics@intel.com> | |
25 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
26 | ||
27 | *******************************************************************************/ | |
28 | ||
29 | #include "ixgb.h" | |
30 | ||
31 | /* Change Log | |
ab707da7 MC |
32 | * 1.0.96 04/19/05 |
33 | * - Make needlessly global code static -- bunk@stusta.de | |
34 | * - ethtool cleanup -- shemminger@osdl.org | |
35 | * - Support for MODULE_VERSION -- linville@tuxdriver.com | |
36 | * - add skb_header_cloned check to the tso path -- herbert@apana.org.au | |
1da177e4 LT |
37 | * 1.0.88 01/05/05 |
38 | * - include fix to the condition that determines when to quit NAPI - Robert Olsson | |
39 | * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down | |
40 | * 1.0.84 10/26/04 | |
41 | * - reset buffer_info->dma in Tx resource cleanup logic | |
42 | * 1.0.83 10/12/04 | |
43 | * - sparse cleanup - shemminger@osdl.org | |
44 | * - fix tx resource cleanup logic | |
45 | */ | |
46 | ||
47 | char ixgb_driver_name[] = "ixgb"; | |
e9ab1d14 | 48 | static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; |
1da177e4 LT |
49 | |
50 | #ifndef CONFIG_IXGB_NAPI | |
51 | #define DRIVERNAPI | |
52 | #else | |
53 | #define DRIVERNAPI "-NAPI" | |
54 | #endif | |
a24e2513 | 55 | #define DRV_VERSION "1.0.104-k4"DRIVERNAPI |
01e5abc2 | 56 | char ixgb_driver_version[] = DRV_VERSION; |
ab707da7 | 57 | static char ixgb_copyright[] = "Copyright (c) 1999-2005 Intel Corporation."; |
1da177e4 LT |
58 | |
59 | /* ixgb_pci_tbl - PCI Device ID Table | |
60 | * | |
61 | * Wildcard entries (PCI_ANY_ID) should come last | |
62 | * Last entry must be all 0s | |
63 | * | |
64 | * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, | |
65 | * Class, Class Mask, private data (not used) } | |
66 | */ | |
67 | static struct pci_device_id ixgb_pci_tbl[] = { | |
68 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, | |
69 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
940829e2 AK |
70 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4, |
71 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
1da177e4 LT |
72 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, |
73 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
74 | {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, | |
75 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
76 | ||
77 | /* required last entry */ | |
78 | {0,} | |
79 | }; | |
80 | ||
81 | MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); | |
82 | ||
83 | /* Local Function Prototypes */ | |
84 | ||
85 | int ixgb_up(struct ixgb_adapter *adapter); | |
86 | void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog); | |
87 | void ixgb_reset(struct ixgb_adapter *adapter); | |
88 | int ixgb_setup_tx_resources(struct ixgb_adapter *adapter); | |
89 | int ixgb_setup_rx_resources(struct ixgb_adapter *adapter); | |
90 | void ixgb_free_tx_resources(struct ixgb_adapter *adapter); | |
91 | void ixgb_free_rx_resources(struct ixgb_adapter *adapter); | |
92 | void ixgb_update_stats(struct ixgb_adapter *adapter); | |
93 | ||
94 | static int ixgb_init_module(void); | |
95 | static void ixgb_exit_module(void); | |
96 | static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); | |
97 | static void __devexit ixgb_remove(struct pci_dev *pdev); | |
98 | static int ixgb_sw_init(struct ixgb_adapter *adapter); | |
99 | static int ixgb_open(struct net_device *netdev); | |
100 | static int ixgb_close(struct net_device *netdev); | |
101 | static void ixgb_configure_tx(struct ixgb_adapter *adapter); | |
102 | static void ixgb_configure_rx(struct ixgb_adapter *adapter); | |
103 | static void ixgb_setup_rctl(struct ixgb_adapter *adapter); | |
104 | static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); | |
105 | static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); | |
106 | static void ixgb_set_multi(struct net_device *netdev); | |
107 | static void ixgb_watchdog(unsigned long data); | |
108 | static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev); | |
109 | static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); | |
110 | static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); | |
111 | static int ixgb_set_mac(struct net_device *netdev, void *p); | |
112 | static irqreturn_t ixgb_intr(int irq, void *data, struct pt_regs *regs); | |
113 | static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter); | |
ac79c82e | 114 | |
1da177e4 LT |
115 | #ifdef CONFIG_IXGB_NAPI |
116 | static int ixgb_clean(struct net_device *netdev, int *budget); | |
117 | static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter, | |
118 | int *work_done, int work_to_do); | |
119 | #else | |
120 | static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter); | |
121 | #endif | |
122 | static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter); | |
123 | void ixgb_set_ethtool_ops(struct net_device *netdev); | |
124 | static void ixgb_tx_timeout(struct net_device *dev); | |
125 | static void ixgb_tx_timeout_task(struct net_device *dev); | |
126 | static void ixgb_vlan_rx_register(struct net_device *netdev, | |
127 | struct vlan_group *grp); | |
128 | static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid); | |
129 | static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid); | |
130 | static void ixgb_restore_vlan(struct ixgb_adapter *adapter); | |
131 | ||
1da177e4 LT |
132 | #ifdef CONFIG_NET_POLL_CONTROLLER |
133 | /* for netdump / net console */ | |
134 | static void ixgb_netpoll(struct net_device *dev); | |
135 | #endif | |
136 | ||
1da177e4 LT |
137 | /* Exported from other modules */ |
138 | ||
139 | extern void ixgb_check_options(struct ixgb_adapter *adapter); | |
140 | ||
141 | static struct pci_driver ixgb_driver = { | |
c2eba932 | 142 | .name = ixgb_driver_name, |
1da177e4 | 143 | .id_table = ixgb_pci_tbl, |
c2eba932 MC |
144 | .probe = ixgb_probe, |
145 | .remove = __devexit_p(ixgb_remove), | |
1da177e4 LT |
146 | }; |
147 | ||
148 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); | |
149 | MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); | |
150 | MODULE_LICENSE("GPL"); | |
01e5abc2 | 151 | MODULE_VERSION(DRV_VERSION); |
1da177e4 | 152 | |
ec9c3f5d AK |
153 | #define DEFAULT_DEBUG_LEVEL_SHIFT 3 |
154 | static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; | |
155 | module_param(debug, int, 0); | |
156 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
157 | ||
1da177e4 | 158 | /* some defines for controlling descriptor fetches in h/w */ |
1da177e4 | 159 | #define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */ |
9c15d24f MC |
160 | #define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below |
161 | * this */ | |
162 | #define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail | |
163 | * is pushed this many descriptors | |
164 | * from head */ | |
1da177e4 LT |
165 | |
166 | /** | |
167 | * ixgb_init_module - Driver Registration Routine | |
168 | * | |
169 | * ixgb_init_module is the first routine called when the driver is | |
170 | * loaded. All it does is register with the PCI subsystem. | |
171 | **/ | |
172 | ||
173 | static int __init | |
174 | ixgb_init_module(void) | |
175 | { | |
1da177e4 LT |
176 | printk(KERN_INFO "%s - version %s\n", |
177 | ixgb_driver_string, ixgb_driver_version); | |
178 | ||
179 | printk(KERN_INFO "%s\n", ixgb_copyright); | |
180 | ||
c2eba932 | 181 | return pci_module_init(&ixgb_driver); |
1da177e4 LT |
182 | } |
183 | ||
184 | module_init(ixgb_init_module); | |
185 | ||
186 | /** | |
187 | * ixgb_exit_module - Driver Exit Cleanup Routine | |
188 | * | |
189 | * ixgb_exit_module is called just before the driver is removed | |
190 | * from memory. | |
191 | **/ | |
192 | ||
193 | static void __exit | |
194 | ixgb_exit_module(void) | |
195 | { | |
1da177e4 LT |
196 | pci_unregister_driver(&ixgb_driver); |
197 | } | |
198 | ||
199 | module_exit(ixgb_exit_module); | |
200 | ||
201 | /** | |
202 | * ixgb_irq_disable - Mask off interrupt generation on the NIC | |
203 | * @adapter: board private structure | |
204 | **/ | |
205 | ||
206 | static inline void | |
207 | ixgb_irq_disable(struct ixgb_adapter *adapter) | |
208 | { | |
209 | atomic_inc(&adapter->irq_sem); | |
210 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); | |
211 | IXGB_WRITE_FLUSH(&adapter->hw); | |
212 | synchronize_irq(adapter->pdev->irq); | |
213 | } | |
214 | ||
215 | /** | |
216 | * ixgb_irq_enable - Enable default interrupt generation settings | |
217 | * @adapter: board private structure | |
218 | **/ | |
219 | ||
220 | static inline void | |
221 | ixgb_irq_enable(struct ixgb_adapter *adapter) | |
222 | { | |
223 | if(atomic_dec_and_test(&adapter->irq_sem)) { | |
224 | IXGB_WRITE_REG(&adapter->hw, IMS, | |
6dfbb6dd MC |
225 | IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW | |
226 | IXGB_INT_LSC); | |
1da177e4 LT |
227 | IXGB_WRITE_FLUSH(&adapter->hw); |
228 | } | |
229 | } | |
230 | ||
231 | int | |
232 | ixgb_up(struct ixgb_adapter *adapter) | |
233 | { | |
234 | struct net_device *netdev = adapter->netdev; | |
235 | int err; | |
236 | int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; | |
237 | struct ixgb_hw *hw = &adapter->hw; | |
238 | ||
239 | /* hardware has been reset, we need to reload some things */ | |
240 | ||
8556f0d1 | 241 | ixgb_rar_set(hw, netdev->dev_addr, 0); |
1da177e4 LT |
242 | ixgb_set_multi(netdev); |
243 | ||
244 | ixgb_restore_vlan(adapter); | |
245 | ||
246 | ixgb_configure_tx(adapter); | |
247 | ixgb_setup_rctl(adapter); | |
248 | ixgb_configure_rx(adapter); | |
249 | ixgb_alloc_rx_buffers(adapter); | |
250 | ||
e59d1696 AK |
251 | /* disable interrupts and get the hardware into a known state */ |
252 | IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); | |
253 | ||
1da177e4 LT |
254 | #ifdef CONFIG_PCI_MSI |
255 | { | |
256 | boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & | |
257 | IXGB_STATUS_PCIX_MODE) ? TRUE : FALSE; | |
258 | adapter->have_msi = TRUE; | |
259 | ||
260 | if (!pcix) | |
261 | adapter->have_msi = FALSE; | |
262 | else if((err = pci_enable_msi(adapter->pdev))) { | |
ec9c3f5d | 263 | DPRINTK(PROBE, ERR, |
1da177e4 LT |
264 | "Unable to allocate MSI interrupt Error: %d\n", err); |
265 | adapter->have_msi = FALSE; | |
266 | /* proceed to try to request regular interrupt */ | |
267 | } | |
268 | } | |
269 | ||
270 | #endif | |
271 | if((err = request_irq(adapter->pdev->irq, &ixgb_intr, | |
272 | SA_SHIRQ | SA_SAMPLE_RANDOM, | |
ec9c3f5d AK |
273 | netdev->name, netdev))) { |
274 | DPRINTK(PROBE, ERR, | |
275 | "Unable to allocate interrupt Error: %d\n", err); | |
1da177e4 | 276 | return err; |
ec9c3f5d | 277 | } |
1da177e4 | 278 | |
1da177e4 LT |
279 | if((hw->max_frame_size != max_frame) || |
280 | (hw->max_frame_size != | |
281 | (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { | |
282 | ||
283 | hw->max_frame_size = max_frame; | |
284 | ||
285 | IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); | |
286 | ||
287 | if(hw->max_frame_size > | |
288 | IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { | |
289 | uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0); | |
290 | ||
291 | if(!(ctrl0 & IXGB_CTRL0_JFE)) { | |
292 | ctrl0 |= IXGB_CTRL0_JFE; | |
293 | IXGB_WRITE_REG(hw, CTRL0, ctrl0); | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1da177e4 LT |
299 | |
300 | #ifdef CONFIG_IXGB_NAPI | |
301 | netif_poll_enable(netdev); | |
302 | #endif | |
e59d1696 AK |
303 | ixgb_irq_enable(adapter); |
304 | ||
1da177e4 LT |
305 | return 0; |
306 | } | |
307 | ||
308 | void | |
309 | ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog) | |
310 | { | |
311 | struct net_device *netdev = adapter->netdev; | |
312 | ||
313 | ixgb_irq_disable(adapter); | |
314 | free_irq(adapter->pdev->irq, netdev); | |
315 | #ifdef CONFIG_PCI_MSI | |
316 | if(adapter->have_msi == TRUE) | |
317 | pci_disable_msi(adapter->pdev); | |
318 | ||
319 | #endif | |
320 | if(kill_watchdog) | |
321 | del_timer_sync(&adapter->watchdog_timer); | |
322 | #ifdef CONFIG_IXGB_NAPI | |
323 | netif_poll_disable(netdev); | |
324 | #endif | |
325 | adapter->link_speed = 0; | |
326 | adapter->link_duplex = 0; | |
327 | netif_carrier_off(netdev); | |
328 | netif_stop_queue(netdev); | |
329 | ||
330 | ixgb_reset(adapter); | |
331 | ixgb_clean_tx_ring(adapter); | |
332 | ixgb_clean_rx_ring(adapter); | |
333 | } | |
334 | ||
335 | void | |
336 | ixgb_reset(struct ixgb_adapter *adapter) | |
337 | { | |
338 | ||
339 | ixgb_adapter_stop(&adapter->hw); | |
340 | if(!ixgb_init_hw(&adapter->hw)) | |
ec9c3f5d | 341 | DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n"); |
1da177e4 LT |
342 | } |
343 | ||
344 | /** | |
345 | * ixgb_probe - Device Initialization Routine | |
346 | * @pdev: PCI device information struct | |
347 | * @ent: entry in ixgb_pci_tbl | |
348 | * | |
349 | * Returns 0 on success, negative on failure | |
350 | * | |
351 | * ixgb_probe initializes an adapter identified by a pci_dev structure. | |
352 | * The OS initialization, configuring of the adapter private structure, | |
353 | * and a hardware reset occur. | |
354 | **/ | |
355 | ||
356 | static int __devinit | |
357 | ixgb_probe(struct pci_dev *pdev, | |
358 | const struct pci_device_id *ent) | |
359 | { | |
360 | struct net_device *netdev = NULL; | |
361 | struct ixgb_adapter *adapter; | |
362 | static int cards_found = 0; | |
363 | unsigned long mmio_start; | |
364 | int mmio_len; | |
365 | int pci_using_dac; | |
366 | int i; | |
367 | int err; | |
368 | ||
369 | if((err = pci_enable_device(pdev))) | |
370 | return err; | |
371 | ||
c91e468a AS |
372 | if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) && |
373 | !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) { | |
1da177e4 LT |
374 | pci_using_dac = 1; |
375 | } else { | |
c91e468a AS |
376 | if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) || |
377 | (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) { | |
ec9c3f5d AK |
378 | printk(KERN_ERR |
379 | "ixgb: No usable DMA configuration, aborting\n"); | |
c91e468a | 380 | goto err_dma_mask; |
1da177e4 LT |
381 | } |
382 | pci_using_dac = 0; | |
383 | } | |
384 | ||
385 | if((err = pci_request_regions(pdev, ixgb_driver_name))) | |
c91e468a | 386 | goto err_request_regions; |
1da177e4 LT |
387 | |
388 | pci_set_master(pdev); | |
389 | ||
390 | netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); | |
391 | if(!netdev) { | |
392 | err = -ENOMEM; | |
393 | goto err_alloc_etherdev; | |
394 | } | |
395 | ||
396 | SET_MODULE_OWNER(netdev); | |
397 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
398 | ||
399 | pci_set_drvdata(pdev, netdev); | |
8908c6cd | 400 | adapter = netdev_priv(netdev); |
1da177e4 LT |
401 | adapter->netdev = netdev; |
402 | adapter->pdev = pdev; | |
403 | adapter->hw.back = adapter; | |
ec9c3f5d | 404 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); |
1da177e4 LT |
405 | |
406 | mmio_start = pci_resource_start(pdev, BAR_0); | |
407 | mmio_len = pci_resource_len(pdev, BAR_0); | |
408 | ||
409 | adapter->hw.hw_addr = ioremap(mmio_start, mmio_len); | |
410 | if(!adapter->hw.hw_addr) { | |
411 | err = -EIO; | |
412 | goto err_ioremap; | |
413 | } | |
414 | ||
415 | for(i = BAR_1; i <= BAR_5; i++) { | |
416 | if(pci_resource_len(pdev, i) == 0) | |
417 | continue; | |
418 | if(pci_resource_flags(pdev, i) & IORESOURCE_IO) { | |
419 | adapter->hw.io_base = pci_resource_start(pdev, i); | |
420 | break; | |
421 | } | |
422 | } | |
423 | ||
424 | netdev->open = &ixgb_open; | |
425 | netdev->stop = &ixgb_close; | |
426 | netdev->hard_start_xmit = &ixgb_xmit_frame; | |
427 | netdev->get_stats = &ixgb_get_stats; | |
428 | netdev->set_multicast_list = &ixgb_set_multi; | |
429 | netdev->set_mac_address = &ixgb_set_mac; | |
430 | netdev->change_mtu = &ixgb_change_mtu; | |
431 | ixgb_set_ethtool_ops(netdev); | |
432 | netdev->tx_timeout = &ixgb_tx_timeout; | |
9b8118df | 433 | netdev->watchdog_timeo = 5 * HZ; |
1da177e4 LT |
434 | #ifdef CONFIG_IXGB_NAPI |
435 | netdev->poll = &ixgb_clean; | |
436 | netdev->weight = 64; | |
437 | #endif | |
438 | netdev->vlan_rx_register = ixgb_vlan_rx_register; | |
439 | netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid; | |
440 | netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid; | |
441 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
442 | netdev->poll_controller = ixgb_netpoll; | |
443 | #endif | |
444 | ||
ec9c3f5d | 445 | strcpy(netdev->name, pci_name(pdev)); |
1da177e4 LT |
446 | netdev->mem_start = mmio_start; |
447 | netdev->mem_end = mmio_start + mmio_len; | |
448 | netdev->base_addr = adapter->hw.io_base; | |
449 | ||
450 | adapter->bd_number = cards_found; | |
451 | adapter->link_speed = 0; | |
452 | adapter->link_duplex = 0; | |
453 | ||
454 | /* setup the private structure */ | |
455 | ||
456 | if((err = ixgb_sw_init(adapter))) | |
457 | goto err_sw_init; | |
458 | ||
459 | netdev->features = NETIF_F_SG | | |
460 | NETIF_F_HW_CSUM | | |
461 | NETIF_F_HW_VLAN_TX | | |
462 | NETIF_F_HW_VLAN_RX | | |
463 | NETIF_F_HW_VLAN_FILTER; | |
464 | #ifdef NETIF_F_TSO | |
465 | netdev->features |= NETIF_F_TSO; | |
466 | #endif | |
f017f14b AK |
467 | #ifdef NETIF_F_LLTX |
468 | netdev->features |= NETIF_F_LLTX; | |
469 | #endif | |
1da177e4 LT |
470 | |
471 | if(pci_using_dac) | |
472 | netdev->features |= NETIF_F_HIGHDMA; | |
473 | ||
474 | /* make sure the EEPROM is good */ | |
475 | ||
476 | if(!ixgb_validate_eeprom_checksum(&adapter->hw)) { | |
ec9c3f5d | 477 | DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n"); |
1da177e4 LT |
478 | err = -EIO; |
479 | goto err_eeprom; | |
480 | } | |
481 | ||
482 | ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); | |
df859c51 | 483 | memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); |
1da177e4 | 484 | |
df859c51 | 485 | if(!is_valid_ether_addr(netdev->perm_addr)) { |
ec9c3f5d | 486 | DPRINTK(PROBE, ERR, "Invalid MAC Address\n"); |
1da177e4 LT |
487 | err = -EIO; |
488 | goto err_eeprom; | |
489 | } | |
490 | ||
491 | adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); | |
492 | ||
493 | init_timer(&adapter->watchdog_timer); | |
494 | adapter->watchdog_timer.function = &ixgb_watchdog; | |
495 | adapter->watchdog_timer.data = (unsigned long)adapter; | |
496 | ||
497 | INIT_WORK(&adapter->tx_timeout_task, | |
498 | (void (*)(void *))ixgb_tx_timeout_task, netdev); | |
499 | ||
ec9c3f5d | 500 | strcpy(netdev->name, "eth%d"); |
1da177e4 LT |
501 | if((err = register_netdev(netdev))) |
502 | goto err_register; | |
503 | ||
504 | /* we're going to reset, so assume we have no link for now */ | |
505 | ||
506 | netif_carrier_off(netdev); | |
507 | netif_stop_queue(netdev); | |
508 | ||
ec9c3f5d | 509 | DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n"); |
1da177e4 LT |
510 | ixgb_check_options(adapter); |
511 | /* reset the hardware with the new settings */ | |
512 | ||
513 | ixgb_reset(adapter); | |
514 | ||
515 | cards_found++; | |
516 | return 0; | |
517 | ||
518 | err_register: | |
519 | err_sw_init: | |
520 | err_eeprom: | |
521 | iounmap(adapter->hw.hw_addr); | |
522 | err_ioremap: | |
523 | free_netdev(netdev); | |
524 | err_alloc_etherdev: | |
525 | pci_release_regions(pdev); | |
c91e468a AS |
526 | err_request_regions: |
527 | err_dma_mask: | |
528 | pci_disable_device(pdev); | |
1da177e4 LT |
529 | return err; |
530 | } | |
531 | ||
532 | /** | |
533 | * ixgb_remove - Device Removal Routine | |
534 | * @pdev: PCI device information struct | |
535 | * | |
536 | * ixgb_remove is called by the PCI subsystem to alert the driver | |
537 | * that it should release a PCI device. The could be caused by a | |
538 | * Hot-Plug event, or because the driver is going to be removed from | |
539 | * memory. | |
540 | **/ | |
541 | ||
542 | static void __devexit | |
543 | ixgb_remove(struct pci_dev *pdev) | |
544 | { | |
545 | struct net_device *netdev = pci_get_drvdata(pdev); | |
8908c6cd | 546 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
547 | |
548 | unregister_netdev(netdev); | |
549 | ||
550 | iounmap(adapter->hw.hw_addr); | |
551 | pci_release_regions(pdev); | |
552 | ||
553 | free_netdev(netdev); | |
554 | } | |
555 | ||
556 | /** | |
557 | * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) | |
558 | * @adapter: board private structure to initialize | |
559 | * | |
560 | * ixgb_sw_init initializes the Adapter private data structure. | |
561 | * Fields are initialized based on PCI device information and | |
562 | * OS network device settings (MTU size). | |
563 | **/ | |
564 | ||
565 | static int __devinit | |
566 | ixgb_sw_init(struct ixgb_adapter *adapter) | |
567 | { | |
568 | struct ixgb_hw *hw = &adapter->hw; | |
569 | struct net_device *netdev = adapter->netdev; | |
570 | struct pci_dev *pdev = adapter->pdev; | |
571 | ||
572 | /* PCI config space info */ | |
573 | ||
574 | hw->vendor_id = pdev->vendor; | |
575 | hw->device_id = pdev->device; | |
576 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
577 | hw->subsystem_id = pdev->subsystem_device; | |
578 | ||
1da177e4 | 579 | hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
3f3dc0dd | 580 | adapter->rx_buffer_len = hw->max_frame_size; |
1da177e4 LT |
581 | |
582 | if((hw->device_id == IXGB_DEVICE_ID_82597EX) | |
940829e2 AK |
583 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) |
584 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) | |
585 | || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) | |
1da177e4 LT |
586 | hw->mac_type = ixgb_82597; |
587 | else { | |
588 | /* should never have loaded on this device */ | |
ec9c3f5d | 589 | DPRINTK(PROBE, ERR, "unsupported device id\n"); |
1da177e4 LT |
590 | } |
591 | ||
592 | /* enable flow control to be programmed */ | |
593 | hw->fc.send_xon = 1; | |
594 | ||
595 | atomic_set(&adapter->irq_sem, 1); | |
596 | spin_lock_init(&adapter->tx_lock); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | /** | |
602 | * ixgb_open - Called when a network interface is made active | |
603 | * @netdev: network interface device structure | |
604 | * | |
605 | * Returns 0 on success, negative value on failure | |
606 | * | |
607 | * The open entry point is called when a network interface is made | |
608 | * active by the system (IFF_UP). At this point all resources needed | |
609 | * for transmit and receive operations are allocated, the interrupt | |
610 | * handler is registered with the OS, the watchdog timer is started, | |
611 | * and the stack is notified that the interface is ready. | |
612 | **/ | |
613 | ||
614 | static int | |
615 | ixgb_open(struct net_device *netdev) | |
616 | { | |
8908c6cd | 617 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
618 | int err; |
619 | ||
620 | /* allocate transmit descriptors */ | |
621 | ||
622 | if((err = ixgb_setup_tx_resources(adapter))) | |
623 | goto err_setup_tx; | |
624 | ||
625 | /* allocate receive descriptors */ | |
626 | ||
627 | if((err = ixgb_setup_rx_resources(adapter))) | |
628 | goto err_setup_rx; | |
629 | ||
630 | if((err = ixgb_up(adapter))) | |
631 | goto err_up; | |
632 | ||
633 | return 0; | |
634 | ||
635 | err_up: | |
636 | ixgb_free_rx_resources(adapter); | |
637 | err_setup_rx: | |
638 | ixgb_free_tx_resources(adapter); | |
639 | err_setup_tx: | |
640 | ixgb_reset(adapter); | |
641 | ||
642 | return err; | |
643 | } | |
644 | ||
645 | /** | |
646 | * ixgb_close - Disables a network interface | |
647 | * @netdev: network interface device structure | |
648 | * | |
649 | * Returns 0, this is not allowed to fail | |
650 | * | |
651 | * The close entry point is called when an interface is de-activated | |
652 | * by the OS. The hardware is still under the drivers control, but | |
653 | * needs to be disabled. A global MAC reset is issued to stop the | |
654 | * hardware, and all transmit and receive resources are freed. | |
655 | **/ | |
656 | ||
657 | static int | |
658 | ixgb_close(struct net_device *netdev) | |
659 | { | |
8908c6cd | 660 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
661 | |
662 | ixgb_down(adapter, TRUE); | |
663 | ||
664 | ixgb_free_tx_resources(adapter); | |
665 | ixgb_free_rx_resources(adapter); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | /** | |
671 | * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) | |
672 | * @adapter: board private structure | |
673 | * | |
674 | * Return 0 on success, negative on failure | |
675 | **/ | |
676 | ||
677 | int | |
678 | ixgb_setup_tx_resources(struct ixgb_adapter *adapter) | |
679 | { | |
680 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
681 | struct pci_dev *pdev = adapter->pdev; | |
682 | int size; | |
683 | ||
684 | size = sizeof(struct ixgb_buffer) * txdr->count; | |
685 | txdr->buffer_info = vmalloc(size); | |
686 | if(!txdr->buffer_info) { | |
ec9c3f5d AK |
687 | DPRINTK(PROBE, ERR, |
688 | "Unable to allocate transmit descriptor ring memory\n"); | |
1da177e4 LT |
689 | return -ENOMEM; |
690 | } | |
691 | memset(txdr->buffer_info, 0, size); | |
692 | ||
693 | /* round up to nearest 4K */ | |
694 | ||
695 | txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); | |
696 | IXGB_ROUNDUP(txdr->size, 4096); | |
697 | ||
698 | txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); | |
699 | if(!txdr->desc) { | |
700 | vfree(txdr->buffer_info); | |
ec9c3f5d AK |
701 | DPRINTK(PROBE, ERR, |
702 | "Unable to allocate transmit descriptor memory\n"); | |
1da177e4 LT |
703 | return -ENOMEM; |
704 | } | |
705 | memset(txdr->desc, 0, txdr->size); | |
706 | ||
707 | txdr->next_to_use = 0; | |
708 | txdr->next_to_clean = 0; | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | /** | |
714 | * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. | |
715 | * @adapter: board private structure | |
716 | * | |
717 | * Configure the Tx unit of the MAC after a reset. | |
718 | **/ | |
719 | ||
720 | static void | |
721 | ixgb_configure_tx(struct ixgb_adapter *adapter) | |
722 | { | |
723 | uint64_t tdba = adapter->tx_ring.dma; | |
724 | uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); | |
725 | uint32_t tctl; | |
726 | struct ixgb_hw *hw = &adapter->hw; | |
727 | ||
728 | /* Setup the Base and Length of the Tx Descriptor Ring | |
729 | * tx_ring.dma can be either a 32 or 64 bit value | |
730 | */ | |
731 | ||
732 | IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); | |
733 | IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); | |
734 | ||
735 | IXGB_WRITE_REG(hw, TDLEN, tdlen); | |
736 | ||
737 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
738 | ||
739 | IXGB_WRITE_REG(hw, TDH, 0); | |
740 | IXGB_WRITE_REG(hw, TDT, 0); | |
741 | ||
742 | /* don't set up txdctl, it induces performance problems if configured | |
743 | * incorrectly */ | |
744 | /* Set the Tx Interrupt Delay register */ | |
745 | ||
746 | IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); | |
747 | ||
748 | /* Program the Transmit Control Register */ | |
749 | ||
750 | tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; | |
751 | IXGB_WRITE_REG(hw, TCTL, tctl); | |
752 | ||
753 | /* Setup Transmit Descriptor Settings for this adapter */ | |
754 | adapter->tx_cmd_type = | |
755 | IXGB_TX_DESC_TYPE | |
756 | | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); | |
757 | } | |
758 | ||
759 | /** | |
760 | * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) | |
761 | * @adapter: board private structure | |
762 | * | |
763 | * Returns 0 on success, negative on failure | |
764 | **/ | |
765 | ||
766 | int | |
767 | ixgb_setup_rx_resources(struct ixgb_adapter *adapter) | |
768 | { | |
769 | struct ixgb_desc_ring *rxdr = &adapter->rx_ring; | |
770 | struct pci_dev *pdev = adapter->pdev; | |
771 | int size; | |
772 | ||
773 | size = sizeof(struct ixgb_buffer) * rxdr->count; | |
774 | rxdr->buffer_info = vmalloc(size); | |
775 | if(!rxdr->buffer_info) { | |
ec9c3f5d AK |
776 | DPRINTK(PROBE, ERR, |
777 | "Unable to allocate receive descriptor ring\n"); | |
1da177e4 LT |
778 | return -ENOMEM; |
779 | } | |
780 | memset(rxdr->buffer_info, 0, size); | |
781 | ||
782 | /* Round up to nearest 4K */ | |
783 | ||
784 | rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); | |
785 | IXGB_ROUNDUP(rxdr->size, 4096); | |
786 | ||
787 | rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); | |
788 | ||
789 | if(!rxdr->desc) { | |
790 | vfree(rxdr->buffer_info); | |
ec9c3f5d AK |
791 | DPRINTK(PROBE, ERR, |
792 | "Unable to allocate receive descriptors\n"); | |
1da177e4 LT |
793 | return -ENOMEM; |
794 | } | |
795 | memset(rxdr->desc, 0, rxdr->size); | |
796 | ||
797 | rxdr->next_to_clean = 0; | |
798 | rxdr->next_to_use = 0; | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | /** | |
804 | * ixgb_setup_rctl - configure the receive control register | |
805 | * @adapter: Board private structure | |
806 | **/ | |
807 | ||
808 | static void | |
809 | ixgb_setup_rctl(struct ixgb_adapter *adapter) | |
810 | { | |
811 | uint32_t rctl; | |
812 | ||
813 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
814 | ||
815 | rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); | |
816 | ||
817 | rctl |= | |
818 | IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | | |
819 | IXGB_RCTL_RXEN | IXGB_RCTL_CFF | | |
820 | (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); | |
821 | ||
822 | rctl |= IXGB_RCTL_SECRC; | |
823 | ||
3f3dc0dd | 824 | if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) |
1da177e4 | 825 | rctl |= IXGB_RCTL_BSIZE_2048; |
3f3dc0dd | 826 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) |
1da177e4 | 827 | rctl |= IXGB_RCTL_BSIZE_4096; |
3f3dc0dd | 828 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) |
1da177e4 | 829 | rctl |= IXGB_RCTL_BSIZE_8192; |
3f3dc0dd | 830 | else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) |
1da177e4 | 831 | rctl |= IXGB_RCTL_BSIZE_16384; |
1da177e4 LT |
832 | |
833 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
834 | } | |
835 | ||
836 | /** | |
837 | * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. | |
838 | * @adapter: board private structure | |
839 | * | |
840 | * Configure the Rx unit of the MAC after a reset. | |
841 | **/ | |
842 | ||
843 | static void | |
844 | ixgb_configure_rx(struct ixgb_adapter *adapter) | |
845 | { | |
846 | uint64_t rdba = adapter->rx_ring.dma; | |
847 | uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); | |
848 | struct ixgb_hw *hw = &adapter->hw; | |
849 | uint32_t rctl; | |
850 | uint32_t rxcsum; | |
851 | uint32_t rxdctl; | |
852 | ||
853 | /* make sure receives are disabled while setting up the descriptors */ | |
854 | ||
855 | rctl = IXGB_READ_REG(hw, RCTL); | |
856 | IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); | |
857 | ||
858 | /* set the Receive Delay Timer Register */ | |
859 | ||
860 | IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); | |
861 | ||
862 | /* Setup the Base and Length of the Rx Descriptor Ring */ | |
863 | ||
864 | IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); | |
865 | IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); | |
866 | ||
867 | IXGB_WRITE_REG(hw, RDLEN, rdlen); | |
868 | ||
869 | /* Setup the HW Rx Head and Tail Descriptor Pointers */ | |
870 | IXGB_WRITE_REG(hw, RDH, 0); | |
871 | IXGB_WRITE_REG(hw, RDT, 0); | |
872 | ||
873 | /* set up pre-fetching of receive buffers so we get some before we | |
874 | * run out (default hardware behavior is to run out before fetching | |
875 | * more). This sets up to fetch if HTHRESH rx descriptors are avail | |
876 | * and the descriptors in hw cache are below PTHRESH. This avoids | |
877 | * the hardware behavior of fetching <=512 descriptors in a single | |
878 | * burst that pre-empts all other activity, usually causing fifo | |
879 | * overflows. */ | |
880 | /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */ | |
881 | rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT | | |
882 | RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT | | |
883 | RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT; | |
884 | IXGB_WRITE_REG(hw, RXDCTL, rxdctl); | |
885 | ||
886 | /* Enable Receive Checksum Offload for TCP and UDP */ | |
887 | if(adapter->rx_csum == TRUE) { | |
888 | rxcsum = IXGB_READ_REG(hw, RXCSUM); | |
889 | rxcsum |= IXGB_RXCSUM_TUOFL; | |
890 | IXGB_WRITE_REG(hw, RXCSUM, rxcsum); | |
891 | } | |
892 | ||
893 | /* Enable Receives */ | |
894 | ||
895 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
896 | } | |
897 | ||
898 | /** | |
899 | * ixgb_free_tx_resources - Free Tx Resources | |
900 | * @adapter: board private structure | |
901 | * | |
902 | * Free all transmit software resources | |
903 | **/ | |
904 | ||
905 | void | |
906 | ixgb_free_tx_resources(struct ixgb_adapter *adapter) | |
907 | { | |
908 | struct pci_dev *pdev = adapter->pdev; | |
909 | ||
910 | ixgb_clean_tx_ring(adapter); | |
911 | ||
912 | vfree(adapter->tx_ring.buffer_info); | |
913 | adapter->tx_ring.buffer_info = NULL; | |
914 | ||
915 | pci_free_consistent(pdev, adapter->tx_ring.size, | |
916 | adapter->tx_ring.desc, adapter->tx_ring.dma); | |
917 | ||
918 | adapter->tx_ring.desc = NULL; | |
919 | } | |
920 | ||
921 | static inline void | |
922 | ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, | |
923 | struct ixgb_buffer *buffer_info) | |
924 | { | |
925 | struct pci_dev *pdev = adapter->pdev; | |
1dfdd7df AK |
926 | |
927 | if (buffer_info->dma) | |
928 | pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, | |
929 | PCI_DMA_TODEVICE); | |
930 | ||
931 | if (buffer_info->skb) | |
1da177e4 | 932 | dev_kfree_skb_any(buffer_info->skb); |
1dfdd7df AK |
933 | |
934 | buffer_info->skb = NULL; | |
935 | buffer_info->dma = 0; | |
936 | buffer_info->time_stamp = 0; | |
937 | /* these fields must always be initialized in tx | |
938 | * buffer_info->length = 0; | |
939 | * buffer_info->next_to_watch = 0; */ | |
1da177e4 LT |
940 | } |
941 | ||
942 | /** | |
943 | * ixgb_clean_tx_ring - Free Tx Buffers | |
944 | * @adapter: board private structure | |
945 | **/ | |
946 | ||
947 | static void | |
948 | ixgb_clean_tx_ring(struct ixgb_adapter *adapter) | |
949 | { | |
950 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
951 | struct ixgb_buffer *buffer_info; | |
952 | unsigned long size; | |
953 | unsigned int i; | |
954 | ||
955 | /* Free all the Tx ring sk_buffs */ | |
956 | ||
957 | for(i = 0; i < tx_ring->count; i++) { | |
958 | buffer_info = &tx_ring->buffer_info[i]; | |
959 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
960 | } | |
961 | ||
962 | size = sizeof(struct ixgb_buffer) * tx_ring->count; | |
963 | memset(tx_ring->buffer_info, 0, size); | |
964 | ||
965 | /* Zero out the descriptor ring */ | |
966 | ||
967 | memset(tx_ring->desc, 0, tx_ring->size); | |
968 | ||
969 | tx_ring->next_to_use = 0; | |
970 | tx_ring->next_to_clean = 0; | |
971 | ||
972 | IXGB_WRITE_REG(&adapter->hw, TDH, 0); | |
973 | IXGB_WRITE_REG(&adapter->hw, TDT, 0); | |
974 | } | |
975 | ||
976 | /** | |
977 | * ixgb_free_rx_resources - Free Rx Resources | |
978 | * @adapter: board private structure | |
979 | * | |
980 | * Free all receive software resources | |
981 | **/ | |
982 | ||
983 | void | |
984 | ixgb_free_rx_resources(struct ixgb_adapter *adapter) | |
985 | { | |
986 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
987 | struct pci_dev *pdev = adapter->pdev; | |
988 | ||
989 | ixgb_clean_rx_ring(adapter); | |
990 | ||
991 | vfree(rx_ring->buffer_info); | |
992 | rx_ring->buffer_info = NULL; | |
993 | ||
994 | pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); | |
995 | ||
996 | rx_ring->desc = NULL; | |
997 | } | |
998 | ||
999 | /** | |
1000 | * ixgb_clean_rx_ring - Free Rx Buffers | |
1001 | * @adapter: board private structure | |
1002 | **/ | |
1003 | ||
1004 | static void | |
1005 | ixgb_clean_rx_ring(struct ixgb_adapter *adapter) | |
1006 | { | |
1007 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
1008 | struct ixgb_buffer *buffer_info; | |
1009 | struct pci_dev *pdev = adapter->pdev; | |
1010 | unsigned long size; | |
1011 | unsigned int i; | |
1012 | ||
1013 | /* Free all the Rx ring sk_buffs */ | |
1014 | ||
1015 | for(i = 0; i < rx_ring->count; i++) { | |
1016 | buffer_info = &rx_ring->buffer_info[i]; | |
1017 | if(buffer_info->skb) { | |
1018 | ||
1019 | pci_unmap_single(pdev, | |
1020 | buffer_info->dma, | |
1021 | buffer_info->length, | |
1022 | PCI_DMA_FROMDEVICE); | |
1023 | ||
1024 | dev_kfree_skb(buffer_info->skb); | |
1025 | ||
1026 | buffer_info->skb = NULL; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | size = sizeof(struct ixgb_buffer) * rx_ring->count; | |
1031 | memset(rx_ring->buffer_info, 0, size); | |
1032 | ||
1033 | /* Zero out the descriptor ring */ | |
1034 | ||
1035 | memset(rx_ring->desc, 0, rx_ring->size); | |
1036 | ||
1037 | rx_ring->next_to_clean = 0; | |
1038 | rx_ring->next_to_use = 0; | |
1039 | ||
1040 | IXGB_WRITE_REG(&adapter->hw, RDH, 0); | |
1041 | IXGB_WRITE_REG(&adapter->hw, RDT, 0); | |
1042 | } | |
1043 | ||
1044 | /** | |
1045 | * ixgb_set_mac - Change the Ethernet Address of the NIC | |
1046 | * @netdev: network interface device structure | |
1047 | * @p: pointer to an address structure | |
1048 | * | |
1049 | * Returns 0 on success, negative on failure | |
1050 | **/ | |
1051 | ||
1052 | static int | |
1053 | ixgb_set_mac(struct net_device *netdev, void *p) | |
1054 | { | |
8908c6cd | 1055 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1056 | struct sockaddr *addr = p; |
1057 | ||
1058 | if(!is_valid_ether_addr(addr->sa_data)) | |
1059 | return -EADDRNOTAVAIL; | |
1060 | ||
1061 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1062 | ||
1063 | ixgb_rar_set(&adapter->hw, addr->sa_data, 0); | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /** | |
1069 | * ixgb_set_multi - Multicast and Promiscuous mode set | |
1070 | * @netdev: network interface device structure | |
1071 | * | |
1072 | * The set_multi entry point is called whenever the multicast address | |
1073 | * list or the network interface flags are updated. This routine is | |
1074 | * responsible for configuring the hardware for proper multicast, | |
1075 | * promiscuous mode, and all-multi behavior. | |
1076 | **/ | |
1077 | ||
1078 | static void | |
1079 | ixgb_set_multi(struct net_device *netdev) | |
1080 | { | |
8908c6cd | 1081 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1082 | struct ixgb_hw *hw = &adapter->hw; |
1083 | struct dev_mc_list *mc_ptr; | |
1084 | uint32_t rctl; | |
1085 | int i; | |
1086 | ||
1087 | /* Check for Promiscuous and All Multicast modes */ | |
1088 | ||
1089 | rctl = IXGB_READ_REG(hw, RCTL); | |
1090 | ||
1091 | if(netdev->flags & IFF_PROMISC) { | |
1092 | rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); | |
1093 | } else if(netdev->flags & IFF_ALLMULTI) { | |
1094 | rctl |= IXGB_RCTL_MPE; | |
1095 | rctl &= ~IXGB_RCTL_UPE; | |
1096 | } else { | |
1097 | rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); | |
1098 | } | |
1099 | ||
1100 | if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { | |
1101 | rctl |= IXGB_RCTL_MPE; | |
1102 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1103 | } else { | |
1104 | uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS]; | |
1105 | ||
1106 | IXGB_WRITE_REG(hw, RCTL, rctl); | |
1107 | ||
1108 | for(i = 0, mc_ptr = netdev->mc_list; mc_ptr; | |
1109 | i++, mc_ptr = mc_ptr->next) | |
1110 | memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS], | |
1111 | mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS); | |
1112 | ||
1113 | ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | /** | |
1118 | * ixgb_watchdog - Timer Call-back | |
1119 | * @data: pointer to netdev cast into an unsigned long | |
1120 | **/ | |
1121 | ||
1122 | static void | |
1123 | ixgb_watchdog(unsigned long data) | |
1124 | { | |
1125 | struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; | |
1126 | struct net_device *netdev = adapter->netdev; | |
1127 | struct ixgb_desc_ring *txdr = &adapter->tx_ring; | |
1128 | ||
1129 | ixgb_check_for_link(&adapter->hw); | |
1130 | ||
1131 | if (ixgb_check_for_bad_link(&adapter->hw)) { | |
1132 | /* force the reset path */ | |
1133 | netif_stop_queue(netdev); | |
1134 | } | |
1135 | ||
1136 | if(adapter->hw.link_up) { | |
1137 | if(!netif_carrier_ok(netdev)) { | |
ec9c3f5d AK |
1138 | DPRINTK(LINK, INFO, |
1139 | "NIC Link is Up 10000 Mbps Full Duplex\n"); | |
1da177e4 LT |
1140 | adapter->link_speed = 10000; |
1141 | adapter->link_duplex = FULL_DUPLEX; | |
1142 | netif_carrier_on(netdev); | |
1143 | netif_wake_queue(netdev); | |
1144 | } | |
1145 | } else { | |
1146 | if(netif_carrier_ok(netdev)) { | |
1147 | adapter->link_speed = 0; | |
1148 | adapter->link_duplex = 0; | |
ec9c3f5d | 1149 | DPRINTK(LINK, INFO, "NIC Link is Down\n"); |
1da177e4 LT |
1150 | netif_carrier_off(netdev); |
1151 | netif_stop_queue(netdev); | |
1152 | ||
1153 | } | |
1154 | } | |
1155 | ||
1156 | ixgb_update_stats(adapter); | |
1157 | ||
1158 | if(!netif_carrier_ok(netdev)) { | |
1159 | if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { | |
1160 | /* We've lost link, so the controller stops DMA, | |
1161 | * but we've got queued Tx work that's never going | |
1162 | * to get done, so reset controller to flush Tx. | |
1163 | * (Do the reset outside of interrupt context). */ | |
1164 | schedule_work(&adapter->tx_timeout_task); | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | /* Force detection of hung controller every watchdog period */ | |
1169 | adapter->detect_tx_hung = TRUE; | |
1170 | ||
1171 | /* generate an interrupt to force clean up of any stragglers */ | |
1172 | IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); | |
1173 | ||
1174 | /* Reset the timer */ | |
1175 | mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); | |
1176 | } | |
1177 | ||
1178 | #define IXGB_TX_FLAGS_CSUM 0x00000001 | |
1179 | #define IXGB_TX_FLAGS_VLAN 0x00000002 | |
1180 | #define IXGB_TX_FLAGS_TSO 0x00000004 | |
1181 | ||
1182 | static inline int | |
1183 | ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) | |
1184 | { | |
1185 | #ifdef NETIF_F_TSO | |
1186 | struct ixgb_context_desc *context_desc; | |
1187 | unsigned int i; | |
1188 | uint8_t ipcss, ipcso, tucss, tucso, hdr_len; | |
1189 | uint16_t ipcse, tucse, mss; | |
1190 | int err; | |
1191 | ||
1192 | if(likely(skb_shinfo(skb)->tso_size)) { | |
1193 | if (skb_header_cloned(skb)) { | |
1194 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1195 | if (err) | |
1196 | return err; | |
1197 | } | |
1198 | ||
1199 | hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2)); | |
1200 | mss = skb_shinfo(skb)->tso_size; | |
1201 | skb->nh.iph->tot_len = 0; | |
1202 | skb->nh.iph->check = 0; | |
1203 | skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr, | |
1204 | skb->nh.iph->daddr, | |
1205 | 0, IPPROTO_TCP, 0); | |
1206 | ipcss = skb->nh.raw - skb->data; | |
1207 | ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data; | |
1208 | ipcse = skb->h.raw - skb->data - 1; | |
1209 | tucss = skb->h.raw - skb->data; | |
1210 | tucso = (void *)&(skb->h.th->check) - (void *)skb->data; | |
1211 | tucse = 0; | |
1212 | ||
1213 | i = adapter->tx_ring.next_to_use; | |
1214 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
1215 | ||
1216 | context_desc->ipcss = ipcss; | |
1217 | context_desc->ipcso = ipcso; | |
1218 | context_desc->ipcse = cpu_to_le16(ipcse); | |
1219 | context_desc->tucss = tucss; | |
1220 | context_desc->tucso = tucso; | |
1221 | context_desc->tucse = cpu_to_le16(tucse); | |
1222 | context_desc->mss = cpu_to_le16(mss); | |
1223 | context_desc->hdr_len = hdr_len; | |
1224 | context_desc->status = 0; | |
1225 | context_desc->cmd_type_len = cpu_to_le32( | |
1226 | IXGB_CONTEXT_DESC_TYPE | |
1227 | | IXGB_CONTEXT_DESC_CMD_TSE | |
1228 | | IXGB_CONTEXT_DESC_CMD_IP | |
1229 | | IXGB_CONTEXT_DESC_CMD_TCP | |
1da177e4 LT |
1230 | | IXGB_CONTEXT_DESC_CMD_IDE |
1231 | | (skb->len - (hdr_len))); | |
1232 | ||
06c2f9ec | 1233 | |
1da177e4 LT |
1234 | if(++i == adapter->tx_ring.count) i = 0; |
1235 | adapter->tx_ring.next_to_use = i; | |
1236 | ||
1237 | return 1; | |
1238 | } | |
1239 | #endif | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | static inline boolean_t | |
1245 | ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) | |
1246 | { | |
1247 | struct ixgb_context_desc *context_desc; | |
1248 | unsigned int i; | |
1249 | uint8_t css, cso; | |
1250 | ||
1251 | if(likely(skb->ip_summed == CHECKSUM_HW)) { | |
1252 | css = skb->h.raw - skb->data; | |
1253 | cso = (skb->h.raw + skb->csum) - skb->data; | |
1254 | ||
1255 | i = adapter->tx_ring.next_to_use; | |
1256 | context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); | |
1257 | ||
1258 | context_desc->tucss = css; | |
1259 | context_desc->tucso = cso; | |
1260 | context_desc->tucse = 0; | |
1261 | /* zero out any previously existing data in one instruction */ | |
1262 | *(uint32_t *)&(context_desc->ipcss) = 0; | |
1263 | context_desc->status = 0; | |
1264 | context_desc->hdr_len = 0; | |
1265 | context_desc->mss = 0; | |
1266 | context_desc->cmd_type_len = | |
1267 | cpu_to_le32(IXGB_CONTEXT_DESC_TYPE | |
06c2f9ec | 1268 | | IXGB_TX_DESC_CMD_IDE); |
1da177e4 LT |
1269 | |
1270 | if(++i == adapter->tx_ring.count) i = 0; | |
1271 | adapter->tx_ring.next_to_use = i; | |
1272 | ||
1273 | return TRUE; | |
1274 | } | |
1275 | ||
1276 | return FALSE; | |
1277 | } | |
1278 | ||
1279 | #define IXGB_MAX_TXD_PWR 14 | |
1280 | #define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) | |
1281 | ||
1282 | static inline int | |
1283 | ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, | |
1284 | unsigned int first) | |
1285 | { | |
1286 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1287 | struct ixgb_buffer *buffer_info; | |
1288 | int len = skb->len; | |
1289 | unsigned int offset = 0, size, count = 0, i; | |
1290 | ||
1291 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; | |
1292 | unsigned int f; | |
ac79c82e | 1293 | |
1da177e4 LT |
1294 | len -= skb->data_len; |
1295 | ||
1296 | i = tx_ring->next_to_use; | |
1297 | ||
1298 | while(len) { | |
1299 | buffer_info = &tx_ring->buffer_info[i]; | |
1300 | size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE); | |
1301 | buffer_info->length = size; | |
1302 | buffer_info->dma = | |
1303 | pci_map_single(adapter->pdev, | |
1304 | skb->data + offset, | |
1305 | size, | |
1306 | PCI_DMA_TODEVICE); | |
1307 | buffer_info->time_stamp = jiffies; | |
1dfdd7df | 1308 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1309 | |
1310 | len -= size; | |
1311 | offset += size; | |
1312 | count++; | |
1313 | if(++i == tx_ring->count) i = 0; | |
1314 | } | |
1315 | ||
1316 | for(f = 0; f < nr_frags; f++) { | |
1317 | struct skb_frag_struct *frag; | |
1318 | ||
1319 | frag = &skb_shinfo(skb)->frags[f]; | |
1320 | len = frag->size; | |
1321 | offset = 0; | |
1322 | ||
1323 | while(len) { | |
1324 | buffer_info = &tx_ring->buffer_info[i]; | |
1325 | size = min(len, IXGB_MAX_JUMBO_FRAME_SIZE); | |
1326 | buffer_info->length = size; | |
1327 | buffer_info->dma = | |
1328 | pci_map_page(adapter->pdev, | |
1329 | frag->page, | |
1330 | frag->page_offset + offset, | |
1331 | size, | |
1332 | PCI_DMA_TODEVICE); | |
1333 | buffer_info->time_stamp = jiffies; | |
1dfdd7df | 1334 | buffer_info->next_to_watch = 0; |
1da177e4 LT |
1335 | |
1336 | len -= size; | |
1337 | offset += size; | |
1338 | count++; | |
1339 | if(++i == tx_ring->count) i = 0; | |
1340 | } | |
1341 | } | |
1342 | i = (i == 0) ? tx_ring->count - 1 : i - 1; | |
1343 | tx_ring->buffer_info[i].skb = skb; | |
1344 | tx_ring->buffer_info[first].next_to_watch = i; | |
1345 | ||
1346 | return count; | |
1347 | } | |
1348 | ||
1349 | static inline void | |
1350 | ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) | |
1351 | { | |
1352 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1353 | struct ixgb_tx_desc *tx_desc = NULL; | |
1354 | struct ixgb_buffer *buffer_info; | |
1355 | uint32_t cmd_type_len = adapter->tx_cmd_type; | |
1356 | uint8_t status = 0; | |
1357 | uint8_t popts = 0; | |
1358 | unsigned int i; | |
1359 | ||
1360 | if(tx_flags & IXGB_TX_FLAGS_TSO) { | |
1361 | cmd_type_len |= IXGB_TX_DESC_CMD_TSE; | |
1362 | popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); | |
1363 | } | |
1364 | ||
1365 | if(tx_flags & IXGB_TX_FLAGS_CSUM) | |
1366 | popts |= IXGB_TX_DESC_POPTS_TXSM; | |
1367 | ||
1368 | if(tx_flags & IXGB_TX_FLAGS_VLAN) { | |
1369 | cmd_type_len |= IXGB_TX_DESC_CMD_VLE; | |
1370 | } | |
1371 | ||
1372 | i = tx_ring->next_to_use; | |
1373 | ||
1374 | while(count--) { | |
1375 | buffer_info = &tx_ring->buffer_info[i]; | |
1376 | tx_desc = IXGB_TX_DESC(*tx_ring, i); | |
1377 | tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); | |
1378 | tx_desc->cmd_type_len = | |
1379 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
1380 | tx_desc->status = status; | |
1381 | tx_desc->popts = popts; | |
1382 | tx_desc->vlan = cpu_to_le16(vlan_id); | |
1383 | ||
1384 | if(++i == tx_ring->count) i = 0; | |
1385 | } | |
1386 | ||
1387 | tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP | |
1388 | | IXGB_TX_DESC_CMD_RS ); | |
1389 | ||
1390 | /* Force memory writes to complete before letting h/w | |
1391 | * know there are new descriptors to fetch. (Only | |
1392 | * applicable for weak-ordered memory model archs, | |
1393 | * such as IA-64). */ | |
1394 | wmb(); | |
1395 | ||
1396 | tx_ring->next_to_use = i; | |
1397 | IXGB_WRITE_REG(&adapter->hw, TDT, i); | |
1398 | } | |
1399 | ||
1400 | /* Tx Descriptors needed, worst case */ | |
1401 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ | |
1402 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | |
1403 | #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) + \ | |
989316dd | 1404 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 |
1da177e4 LT |
1405 | |
1406 | static int | |
1407 | ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |
1408 | { | |
8908c6cd | 1409 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1410 | unsigned int first; |
1411 | unsigned int tx_flags = 0; | |
1412 | unsigned long flags; | |
1413 | int vlan_id = 0; | |
1414 | int tso; | |
1415 | ||
1416 | if(skb->len <= 0) { | |
1417 | dev_kfree_skb_any(skb); | |
1418 | return 0; | |
1419 | } | |
1420 | ||
f017f14b AK |
1421 | #ifdef NETIF_F_LLTX |
1422 | local_irq_save(flags); | |
1423 | if (!spin_trylock(&adapter->tx_lock)) { | |
1424 | /* Collision - tell upper layer to requeue */ | |
1425 | local_irq_restore(flags); | |
1426 | return NETDEV_TX_LOCKED; | |
1427 | } | |
1428 | #else | |
1da177e4 | 1429 | spin_lock_irqsave(&adapter->tx_lock, flags); |
f017f14b AK |
1430 | #endif |
1431 | ||
1da177e4 LT |
1432 | if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) { |
1433 | netif_stop_queue(netdev); | |
1434 | spin_unlock_irqrestore(&adapter->tx_lock, flags); | |
f017f14b | 1435 | return NETDEV_TX_BUSY; |
1da177e4 | 1436 | } |
f017f14b AK |
1437 | |
1438 | #ifndef NETIF_F_LLTX | |
1da177e4 | 1439 | spin_unlock_irqrestore(&adapter->tx_lock, flags); |
f017f14b | 1440 | #endif |
1da177e4 LT |
1441 | |
1442 | if(adapter->vlgrp && vlan_tx_tag_present(skb)) { | |
1443 | tx_flags |= IXGB_TX_FLAGS_VLAN; | |
1444 | vlan_id = vlan_tx_tag_get(skb); | |
1445 | } | |
1446 | ||
1447 | first = adapter->tx_ring.next_to_use; | |
1448 | ||
1449 | tso = ixgb_tso(adapter, skb); | |
1450 | if (tso < 0) { | |
1451 | dev_kfree_skb_any(skb); | |
f017f14b AK |
1452 | #ifdef NETIF_F_LLTX |
1453 | spin_unlock_irqrestore(&adapter->tx_lock, flags); | |
1454 | #endif | |
1da177e4 LT |
1455 | return NETDEV_TX_OK; |
1456 | } | |
1457 | ||
96f9c2e2 | 1458 | if (likely(tso)) |
1da177e4 LT |
1459 | tx_flags |= IXGB_TX_FLAGS_TSO; |
1460 | else if(ixgb_tx_csum(adapter, skb)) | |
1461 | tx_flags |= IXGB_TX_FLAGS_CSUM; | |
1462 | ||
1463 | ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id, | |
1464 | tx_flags); | |
1465 | ||
1466 | netdev->trans_start = jiffies; | |
1467 | ||
f017f14b AK |
1468 | #ifdef NETIF_F_LLTX |
1469 | /* Make sure there is space in the ring for the next send. */ | |
1470 | if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) | |
1471 | netif_stop_queue(netdev); | |
1472 | ||
1473 | spin_unlock_irqrestore(&adapter->tx_lock, flags); | |
1474 | ||
1475 | #endif | |
1476 | return NETDEV_TX_OK; | |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | /** | |
1480 | * ixgb_tx_timeout - Respond to a Tx Hang | |
1481 | * @netdev: network interface device structure | |
1482 | **/ | |
1483 | ||
1484 | static void | |
1485 | ixgb_tx_timeout(struct net_device *netdev) | |
1486 | { | |
8908c6cd | 1487 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1488 | |
1489 | /* Do the reset outside of interrupt context */ | |
1490 | schedule_work(&adapter->tx_timeout_task); | |
1491 | } | |
1492 | ||
1493 | static void | |
1494 | ixgb_tx_timeout_task(struct net_device *netdev) | |
1495 | { | |
8908c6cd | 1496 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 1497 | |
9b8118df | 1498 | adapter->tx_timeout_count++; |
1da177e4 LT |
1499 | ixgb_down(adapter, TRUE); |
1500 | ixgb_up(adapter); | |
1501 | } | |
1502 | ||
1503 | /** | |
1504 | * ixgb_get_stats - Get System Network Statistics | |
1505 | * @netdev: network interface device structure | |
1506 | * | |
1507 | * Returns the address of the device statistics structure. | |
1508 | * The statistics are actually updated from the timer callback. | |
1509 | **/ | |
1510 | ||
1511 | static struct net_device_stats * | |
1512 | ixgb_get_stats(struct net_device *netdev) | |
1513 | { | |
8908c6cd | 1514 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1515 | |
1516 | return &adapter->net_stats; | |
1517 | } | |
1518 | ||
1519 | /** | |
1520 | * ixgb_change_mtu - Change the Maximum Transfer Unit | |
1521 | * @netdev: network interface device structure | |
1522 | * @new_mtu: new value for maximum frame size | |
1523 | * | |
1524 | * Returns 0 on success, negative on failure | |
1525 | **/ | |
1526 | ||
1527 | static int | |
1528 | ixgb_change_mtu(struct net_device *netdev, int new_mtu) | |
1529 | { | |
8908c6cd | 1530 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1531 | int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; |
1532 | int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; | |
1533 | ||
1534 | ||
1535 | if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) | |
1536 | || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { | |
ec9c3f5d | 1537 | DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu); |
1da177e4 LT |
1538 | return -EINVAL; |
1539 | } | |
1540 | ||
3f3dc0dd | 1541 | adapter->rx_buffer_len = max_frame; |
1da177e4 LT |
1542 | |
1543 | netdev->mtu = new_mtu; | |
1544 | ||
3f3dc0dd | 1545 | if ((old_max_frame != max_frame) && netif_running(netdev)) { |
1da177e4 LT |
1546 | ixgb_down(adapter, TRUE); |
1547 | ixgb_up(adapter); | |
1548 | } | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | /** | |
1554 | * ixgb_update_stats - Update the board statistics counters. | |
1555 | * @adapter: board private structure | |
1556 | **/ | |
1557 | ||
1558 | void | |
1559 | ixgb_update_stats(struct ixgb_adapter *adapter) | |
1560 | { | |
5633684d MC |
1561 | struct net_device *netdev = adapter->netdev; |
1562 | ||
1563 | if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || | |
1564 | (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { | |
1565 | u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); | |
1566 | u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); | |
1567 | u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); | |
1568 | u64 bcast = ((u64)bcast_h << 32) | bcast_l; | |
1569 | ||
1570 | multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); | |
1571 | /* fix up multicast stats by removing broadcasts */ | |
7b89178d MC |
1572 | if(multi >= bcast) |
1573 | multi -= bcast; | |
5633684d MC |
1574 | |
1575 | adapter->stats.mprcl += (multi & 0xFFFFFFFF); | |
1576 | adapter->stats.mprch += (multi >> 32); | |
1577 | adapter->stats.bprcl += bcast_l; | |
1578 | adapter->stats.bprch += bcast_h; | |
1579 | } else { | |
1580 | adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); | |
1581 | adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); | |
1582 | adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); | |
1583 | adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); | |
1584 | } | |
1da177e4 LT |
1585 | adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); |
1586 | adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); | |
1587 | adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); | |
1588 | adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); | |
1da177e4 LT |
1589 | adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); |
1590 | adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); | |
1591 | adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); | |
1592 | adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); | |
1593 | adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); | |
1594 | adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); | |
1595 | adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); | |
1596 | adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); | |
1597 | adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); | |
1598 | adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); | |
1599 | adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); | |
1600 | adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); | |
1601 | adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); | |
1602 | adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); | |
1603 | adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); | |
1604 | adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); | |
1605 | adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); | |
1606 | adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); | |
1607 | adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); | |
1608 | adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); | |
1609 | adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); | |
1610 | adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); | |
1611 | adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); | |
1612 | adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); | |
1613 | adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); | |
1614 | adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); | |
1615 | adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); | |
1616 | adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); | |
1617 | adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); | |
1618 | adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); | |
1619 | adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); | |
1620 | adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); | |
1621 | adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); | |
1622 | adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); | |
1623 | adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); | |
1624 | adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); | |
1625 | adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); | |
1626 | adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); | |
1627 | adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); | |
1628 | adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); | |
1629 | adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); | |
1630 | adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); | |
1631 | adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); | |
1632 | adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); | |
1633 | adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); | |
1634 | adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); | |
1635 | adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); | |
1636 | adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); | |
1637 | adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); | |
1638 | adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); | |
1639 | adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); | |
1640 | adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); | |
1641 | ||
1642 | /* Fill out the OS statistics structure */ | |
1643 | ||
1644 | adapter->net_stats.rx_packets = adapter->stats.gprcl; | |
1645 | adapter->net_stats.tx_packets = adapter->stats.gptcl; | |
1646 | adapter->net_stats.rx_bytes = adapter->stats.gorcl; | |
1647 | adapter->net_stats.tx_bytes = adapter->stats.gotcl; | |
1648 | adapter->net_stats.multicast = adapter->stats.mprcl; | |
1649 | adapter->net_stats.collisions = 0; | |
1650 | ||
1651 | /* ignore RLEC as it reports errors for padded (<64bytes) frames | |
1652 | * with a length in the type/len field */ | |
1653 | adapter->net_stats.rx_errors = | |
1654 | /* adapter->stats.rnbc + */ adapter->stats.crcerrs + | |
1655 | adapter->stats.ruc + | |
1656 | adapter->stats.roc /*+ adapter->stats.rlec */ + | |
1657 | adapter->stats.icbc + | |
1658 | adapter->stats.ecbc + adapter->stats.mpc; | |
1659 | ||
1da177e4 LT |
1660 | /* see above |
1661 | * adapter->net_stats.rx_length_errors = adapter->stats.rlec; | |
1662 | */ | |
1663 | ||
1664 | adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; | |
1665 | adapter->net_stats.rx_fifo_errors = adapter->stats.mpc; | |
1666 | adapter->net_stats.rx_missed_errors = adapter->stats.mpc; | |
1667 | adapter->net_stats.rx_over_errors = adapter->stats.mpc; | |
1668 | ||
1669 | adapter->net_stats.tx_errors = 0; | |
1670 | adapter->net_stats.rx_frame_errors = 0; | |
1671 | adapter->net_stats.tx_aborted_errors = 0; | |
1672 | adapter->net_stats.tx_carrier_errors = 0; | |
1673 | adapter->net_stats.tx_fifo_errors = 0; | |
1674 | adapter->net_stats.tx_heartbeat_errors = 0; | |
1675 | adapter->net_stats.tx_window_errors = 0; | |
1676 | } | |
1677 | ||
1678 | #define IXGB_MAX_INTR 10 | |
1679 | /** | |
1680 | * ixgb_intr - Interrupt Handler | |
1681 | * @irq: interrupt number | |
1682 | * @data: pointer to a network interface device structure | |
1683 | * @pt_regs: CPU registers structure | |
1684 | **/ | |
1685 | ||
1686 | static irqreturn_t | |
1687 | ixgb_intr(int irq, void *data, struct pt_regs *regs) | |
1688 | { | |
1689 | struct net_device *netdev = data; | |
8908c6cd | 1690 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1691 | struct ixgb_hw *hw = &adapter->hw; |
1692 | uint32_t icr = IXGB_READ_REG(hw, ICR); | |
1693 | #ifndef CONFIG_IXGB_NAPI | |
1694 | unsigned int i; | |
1695 | #endif | |
1696 | ||
1697 | if(unlikely(!icr)) | |
1698 | return IRQ_NONE; /* Not our interrupt */ | |
1699 | ||
1700 | if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) { | |
1701 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1702 | } | |
1703 | ||
1704 | #ifdef CONFIG_IXGB_NAPI | |
1705 | if(netif_rx_schedule_prep(netdev)) { | |
1706 | ||
1707 | /* Disable interrupts and register for poll. The flush | |
1708 | of the posted write is intentionally left out. | |
1709 | */ | |
1710 | ||
1711 | atomic_inc(&adapter->irq_sem); | |
1712 | IXGB_WRITE_REG(&adapter->hw, IMC, ~0); | |
1713 | __netif_rx_schedule(netdev); | |
1714 | } | |
1715 | #else | |
1716 | /* yes, that is actually a & and it is meant to make sure that | |
1717 | * every pass through this for loop checks both receive and | |
1718 | * transmit queues for completed descriptors, intended to | |
1719 | * avoid starvation issues and assist tx/rx fairness. */ | |
1720 | for(i = 0; i < IXGB_MAX_INTR; i++) | |
1721 | if(!ixgb_clean_rx_irq(adapter) & | |
1722 | !ixgb_clean_tx_irq(adapter)) | |
1723 | break; | |
1724 | #endif | |
1725 | return IRQ_HANDLED; | |
1726 | } | |
1727 | ||
1728 | #ifdef CONFIG_IXGB_NAPI | |
1729 | /** | |
1730 | * ixgb_clean - NAPI Rx polling callback | |
1731 | * @adapter: board private structure | |
1732 | **/ | |
1733 | ||
1734 | static int | |
1735 | ixgb_clean(struct net_device *netdev, int *budget) | |
1736 | { | |
8908c6cd | 1737 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1738 | int work_to_do = min(*budget, netdev->quota); |
1739 | int tx_cleaned; | |
1740 | int work_done = 0; | |
1741 | ||
1742 | tx_cleaned = ixgb_clean_tx_irq(adapter); | |
1743 | ixgb_clean_rx_irq(adapter, &work_done, work_to_do); | |
1744 | ||
1745 | *budget -= work_done; | |
1746 | netdev->quota -= work_done; | |
1747 | ||
1748 | /* if no Tx and not enough Rx work done, exit the polling mode */ | |
1749 | if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) { | |
1750 | netif_rx_complete(netdev); | |
1751 | ixgb_irq_enable(adapter); | |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | return 1; | |
1756 | } | |
1757 | #endif | |
1758 | ||
1759 | /** | |
1760 | * ixgb_clean_tx_irq - Reclaim resources after transmit completes | |
1761 | * @adapter: board private structure | |
1762 | **/ | |
1763 | ||
1764 | static boolean_t | |
1765 | ixgb_clean_tx_irq(struct ixgb_adapter *adapter) | |
1766 | { | |
1767 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | |
1768 | struct net_device *netdev = adapter->netdev; | |
1769 | struct ixgb_tx_desc *tx_desc, *eop_desc; | |
1770 | struct ixgb_buffer *buffer_info; | |
1771 | unsigned int i, eop; | |
1772 | boolean_t cleaned = FALSE; | |
1773 | ||
1774 | i = tx_ring->next_to_clean; | |
1775 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1776 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1777 | ||
1778 | while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) { | |
1779 | ||
1780 | for(cleaned = FALSE; !cleaned; ) { | |
1781 | tx_desc = IXGB_TX_DESC(*tx_ring, i); | |
1782 | buffer_info = &tx_ring->buffer_info[i]; | |
1783 | ||
1784 | if (tx_desc->popts | |
1785 | & (IXGB_TX_DESC_POPTS_TXSM | | |
1786 | IXGB_TX_DESC_POPTS_IXSM)) | |
1787 | adapter->hw_csum_tx_good++; | |
1788 | ||
1789 | ixgb_unmap_and_free_tx_resource(adapter, buffer_info); | |
1790 | ||
1791 | *(uint32_t *)&(tx_desc->status) = 0; | |
1792 | ||
1793 | cleaned = (i == eop); | |
1794 | if(++i == tx_ring->count) i = 0; | |
1795 | } | |
1796 | ||
1797 | eop = tx_ring->buffer_info[i].next_to_watch; | |
1798 | eop_desc = IXGB_TX_DESC(*tx_ring, eop); | |
1799 | } | |
1800 | ||
1801 | tx_ring->next_to_clean = i; | |
1802 | ||
3352a3b2 AK |
1803 | if (unlikely(netif_queue_stopped(netdev))) { |
1804 | spin_lock(&adapter->tx_lock); | |
1805 | if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) && | |
1806 | (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE)) | |
1807 | netif_wake_queue(netdev); | |
1808 | spin_unlock(&adapter->tx_lock); | |
1da177e4 | 1809 | } |
1da177e4 LT |
1810 | |
1811 | if(adapter->detect_tx_hung) { | |
1812 | /* detect a transmit hang in hardware, this serializes the | |
1813 | * check with the clearing of time_stamp and movement of i */ | |
1814 | adapter->detect_tx_hung = FALSE; | |
9b8118df AK |
1815 | if (tx_ring->buffer_info[eop].dma && |
1816 | time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) | |
1da177e4 | 1817 | && !(IXGB_READ_REG(&adapter->hw, STATUS) & |
9b8118df AK |
1818 | IXGB_STATUS_TXOFF)) { |
1819 | /* detected Tx unit hang */ | |
1820 | DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" | |
1821 | " TDH <%x>\n" | |
1822 | " TDT <%x>\n" | |
1823 | " next_to_use <%x>\n" | |
1824 | " next_to_clean <%x>\n" | |
1825 | "buffer_info[next_to_clean]\n" | |
1826 | " time_stamp <%lx>\n" | |
1827 | " next_to_watch <%x>\n" | |
1828 | " jiffies <%lx>\n" | |
1829 | " next_to_watch.status <%x>\n", | |
1830 | IXGB_READ_REG(&adapter->hw, TDH), | |
1831 | IXGB_READ_REG(&adapter->hw, TDT), | |
1832 | tx_ring->next_to_use, | |
1833 | tx_ring->next_to_clean, | |
1834 | tx_ring->buffer_info[eop].time_stamp, | |
1835 | eop, | |
1836 | jiffies, | |
1837 | eop_desc->status); | |
1da177e4 | 1838 | netif_stop_queue(netdev); |
9b8118df | 1839 | } |
1da177e4 LT |
1840 | } |
1841 | ||
1842 | return cleaned; | |
1843 | } | |
1844 | ||
1845 | /** | |
1846 | * ixgb_rx_checksum - Receive Checksum Offload for 82597. | |
1847 | * @adapter: board private structure | |
1848 | * @rx_desc: receive descriptor | |
1849 | * @sk_buff: socket buffer with received data | |
1850 | **/ | |
1851 | ||
1852 | static inline void | |
1853 | ixgb_rx_checksum(struct ixgb_adapter *adapter, | |
1854 | struct ixgb_rx_desc *rx_desc, | |
1855 | struct sk_buff *skb) | |
1856 | { | |
1857 | /* Ignore Checksum bit is set OR | |
1858 | * TCP Checksum has not been calculated | |
1859 | */ | |
1860 | if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || | |
1861 | (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { | |
1862 | skb->ip_summed = CHECKSUM_NONE; | |
1863 | return; | |
1864 | } | |
1865 | ||
1866 | /* At this point we know the hardware did the TCP checksum */ | |
1867 | /* now look at the TCP checksum error bit */ | |
1868 | if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { | |
1869 | /* let the stack verify checksum errors */ | |
1870 | skb->ip_summed = CHECKSUM_NONE; | |
1871 | adapter->hw_csum_rx_error++; | |
1872 | } else { | |
1873 | /* TCP checksum is good */ | |
1874 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1875 | adapter->hw_csum_rx_good++; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | /** | |
1880 | * ixgb_clean_rx_irq - Send received data up the network stack, | |
1881 | * @adapter: board private structure | |
1882 | **/ | |
1883 | ||
1884 | static boolean_t | |
1885 | #ifdef CONFIG_IXGB_NAPI | |
1886 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) | |
1887 | #else | |
1888 | ixgb_clean_rx_irq(struct ixgb_adapter *adapter) | |
1889 | #endif | |
1890 | { | |
1891 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
1892 | struct net_device *netdev = adapter->netdev; | |
1893 | struct pci_dev *pdev = adapter->pdev; | |
1894 | struct ixgb_rx_desc *rx_desc, *next_rxd; | |
1895 | struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; | |
1da177e4 LT |
1896 | uint32_t length; |
1897 | unsigned int i, j; | |
1898 | boolean_t cleaned = FALSE; | |
1899 | ||
1900 | i = rx_ring->next_to_clean; | |
1901 | rx_desc = IXGB_RX_DESC(*rx_ring, i); | |
1902 | buffer_info = &rx_ring->buffer_info[i]; | |
1903 | ||
1904 | while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) { | |
f404de1c MC |
1905 | struct sk_buff *skb, *next_skb; |
1906 | u8 status; | |
1da177e4 LT |
1907 | |
1908 | #ifdef CONFIG_IXGB_NAPI | |
1909 | if(*work_done >= work_to_do) | |
1910 | break; | |
1911 | ||
1912 | (*work_done)++; | |
1913 | #endif | |
f404de1c | 1914 | status = rx_desc->status; |
1da177e4 | 1915 | skb = buffer_info->skb; |
1dfdd7df | 1916 | buffer_info->skb = NULL; |
f404de1c | 1917 | |
1da177e4 LT |
1918 | prefetch(skb->data); |
1919 | ||
1920 | if(++i == rx_ring->count) i = 0; | |
1921 | next_rxd = IXGB_RX_DESC(*rx_ring, i); | |
1922 | prefetch(next_rxd); | |
1923 | ||
1924 | if((j = i + 1) == rx_ring->count) j = 0; | |
1925 | next2_buffer = &rx_ring->buffer_info[j]; | |
1926 | prefetch(next2_buffer); | |
1927 | ||
1928 | next_buffer = &rx_ring->buffer_info[i]; | |
1929 | next_skb = next_buffer->skb; | |
1930 | prefetch(next_skb); | |
1931 | ||
1da177e4 LT |
1932 | cleaned = TRUE; |
1933 | ||
1934 | pci_unmap_single(pdev, | |
1935 | buffer_info->dma, | |
1936 | buffer_info->length, | |
1937 | PCI_DMA_FROMDEVICE); | |
1938 | ||
1939 | length = le16_to_cpu(rx_desc->length); | |
1940 | ||
f404de1c | 1941 | if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { |
1da177e4 LT |
1942 | |
1943 | /* All receives must fit into a single buffer */ | |
1944 | ||
1945 | IXGB_DBG("Receive packet consumed multiple buffers " | |
1946 | "length<%x>\n", length); | |
1947 | ||
1948 | dev_kfree_skb_irq(skb); | |
f404de1c | 1949 | goto rxdesc_done; |
1da177e4 LT |
1950 | } |
1951 | ||
1952 | if (unlikely(rx_desc->errors | |
1953 | & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | |
1954 | | IXGB_RX_DESC_ERRORS_P | | |
1955 | IXGB_RX_DESC_ERRORS_RXE))) { | |
1956 | ||
1957 | dev_kfree_skb_irq(skb); | |
f404de1c | 1958 | goto rxdesc_done; |
1da177e4 LT |
1959 | } |
1960 | ||
6b900bb4 AK |
1961 | /* code added for copybreak, this should improve |
1962 | * performance for small packets with large amounts | |
1963 | * of reassembly being done in the stack */ | |
1964 | #define IXGB_CB_LENGTH 256 | |
1965 | if (length < IXGB_CB_LENGTH) { | |
1966 | struct sk_buff *new_skb = | |
1967 | dev_alloc_skb(length + NET_IP_ALIGN); | |
1968 | if (new_skb) { | |
1969 | skb_reserve(new_skb, NET_IP_ALIGN); | |
1970 | new_skb->dev = netdev; | |
1971 | memcpy(new_skb->data - NET_IP_ALIGN, | |
1972 | skb->data - NET_IP_ALIGN, | |
1973 | length + NET_IP_ALIGN); | |
1974 | /* save the skb in buffer_info as good */ | |
1975 | buffer_info->skb = skb; | |
1976 | skb = new_skb; | |
1977 | } | |
1978 | } | |
1979 | /* end copybreak code */ | |
1980 | ||
1da177e4 LT |
1981 | /* Good Receive */ |
1982 | skb_put(skb, length); | |
1983 | ||
1984 | /* Receive Checksum Offload */ | |
1985 | ixgb_rx_checksum(adapter, rx_desc, skb); | |
1986 | ||
1987 | skb->protocol = eth_type_trans(skb, netdev); | |
1988 | #ifdef CONFIG_IXGB_NAPI | |
f404de1c | 1989 | if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { |
1da177e4 LT |
1990 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, |
1991 | le16_to_cpu(rx_desc->special) & | |
1992 | IXGB_RX_DESC_SPECIAL_VLAN_MASK); | |
1993 | } else { | |
1994 | netif_receive_skb(skb); | |
1995 | } | |
1996 | #else /* CONFIG_IXGB_NAPI */ | |
f404de1c | 1997 | if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) { |
1da177e4 LT |
1998 | vlan_hwaccel_rx(skb, adapter->vlgrp, |
1999 | le16_to_cpu(rx_desc->special) & | |
2000 | IXGB_RX_DESC_SPECIAL_VLAN_MASK); | |
2001 | } else { | |
2002 | netif_rx(skb); | |
2003 | } | |
2004 | #endif /* CONFIG_IXGB_NAPI */ | |
2005 | netdev->last_rx = jiffies; | |
2006 | ||
f404de1c MC |
2007 | rxdesc_done: |
2008 | /* clean up descriptor, might be written over by hw */ | |
1da177e4 | 2009 | rx_desc->status = 0; |
1da177e4 | 2010 | |
f404de1c | 2011 | /* use prefetched values */ |
1da177e4 LT |
2012 | rx_desc = next_rxd; |
2013 | buffer_info = next_buffer; | |
2014 | } | |
2015 | ||
2016 | rx_ring->next_to_clean = i; | |
2017 | ||
2018 | ixgb_alloc_rx_buffers(adapter); | |
2019 | ||
2020 | return cleaned; | |
2021 | } | |
2022 | ||
2023 | /** | |
2024 | * ixgb_alloc_rx_buffers - Replace used receive buffers | |
2025 | * @adapter: address of board private structure | |
2026 | **/ | |
2027 | ||
2028 | static void | |
2029 | ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter) | |
2030 | { | |
2031 | struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; | |
2032 | struct net_device *netdev = adapter->netdev; | |
2033 | struct pci_dev *pdev = adapter->pdev; | |
2034 | struct ixgb_rx_desc *rx_desc; | |
2035 | struct ixgb_buffer *buffer_info; | |
2036 | struct sk_buff *skb; | |
2037 | unsigned int i; | |
2038 | int num_group_tail_writes; | |
2039 | long cleancount; | |
2040 | ||
2041 | i = rx_ring->next_to_use; | |
2042 | buffer_info = &rx_ring->buffer_info[i]; | |
2043 | cleancount = IXGB_DESC_UNUSED(rx_ring); | |
2044 | ||
2045 | num_group_tail_writes = IXGB_RX_BUFFER_WRITE; | |
2046 | ||
41639fed MC |
2047 | /* leave three descriptors unused */ |
2048 | while(--cleancount > 2) { | |
1dfdd7df AK |
2049 | /* recycle! its good for you */ |
2050 | if (!(skb = buffer_info->skb)) | |
2051 | skb = dev_alloc_skb(adapter->rx_buffer_len | |
2052 | + NET_IP_ALIGN); | |
2053 | else { | |
2054 | skb_trim(skb, 0); | |
2055 | goto map_skb; | |
2056 | } | |
1da177e4 | 2057 | |
1dfdd7df | 2058 | if (unlikely(!skb)) { |
1da177e4 | 2059 | /* Better luck next round */ |
1dfdd7df | 2060 | adapter->alloc_rx_buff_failed++; |
1da177e4 LT |
2061 | break; |
2062 | } | |
2063 | ||
2064 | /* Make buffer alignment 2 beyond a 16 byte boundary | |
2065 | * this will result in a 16 byte aligned IP header after | |
2066 | * the 14 byte MAC header is removed | |
2067 | */ | |
2068 | skb_reserve(skb, NET_IP_ALIGN); | |
2069 | ||
2070 | skb->dev = netdev; | |
2071 | ||
2072 | buffer_info->skb = skb; | |
2073 | buffer_info->length = adapter->rx_buffer_len; | |
1dfdd7df AK |
2074 | map_skb: |
2075 | buffer_info->dma = pci_map_single(pdev, | |
2076 | skb->data, | |
2077 | adapter->rx_buffer_len, | |
2078 | PCI_DMA_FROMDEVICE); | |
1da177e4 | 2079 | |
1dfdd7df | 2080 | rx_desc = IXGB_RX_DESC(*rx_ring, i); |
1da177e4 | 2081 | rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); |
41639fed MC |
2082 | /* guarantee DD bit not set now before h/w gets descriptor |
2083 | * this is the rest of the workaround for h/w double | |
2084 | * writeback. */ | |
2085 | rx_desc->status = 0; | |
1da177e4 | 2086 | |
1da177e4 LT |
2087 | |
2088 | if(++i == rx_ring->count) i = 0; | |
2089 | buffer_info = &rx_ring->buffer_info[i]; | |
2090 | } | |
2091 | ||
1dfdd7df AK |
2092 | if (likely(rx_ring->next_to_use != i)) { |
2093 | rx_ring->next_to_use = i; | |
2094 | if (unlikely(i-- == 0)) | |
2095 | i = (rx_ring->count - 1); | |
2096 | ||
2097 | /* Force memory writes to complete before letting h/w | |
2098 | * know there are new descriptors to fetch. (Only | |
2099 | * applicable for weak-ordered memory model archs, such | |
2100 | * as IA-64). */ | |
2101 | wmb(); | |
2102 | IXGB_WRITE_REG(&adapter->hw, RDT, i); | |
2103 | } | |
1da177e4 LT |
2104 | } |
2105 | ||
2106 | /** | |
2107 | * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping. | |
2108 | * | |
2109 | * @param netdev network interface device structure | |
2110 | * @param grp indicates to enable or disable tagging/stripping | |
2111 | **/ | |
2112 | static void | |
2113 | ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) | |
2114 | { | |
8908c6cd | 2115 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
2116 | uint32_t ctrl, rctl; |
2117 | ||
2118 | ixgb_irq_disable(adapter); | |
2119 | adapter->vlgrp = grp; | |
2120 | ||
2121 | if(grp) { | |
2122 | /* enable VLAN tag insert/strip */ | |
2123 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2124 | ctrl |= IXGB_CTRL0_VME; | |
2125 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
2126 | ||
2127 | /* enable VLAN receive filtering */ | |
2128 | ||
2129 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
2130 | rctl |= IXGB_RCTL_VFE; | |
2131 | rctl &= ~IXGB_RCTL_CFIEN; | |
2132 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
2133 | } else { | |
2134 | /* disable VLAN tag insert/strip */ | |
2135 | ||
2136 | ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); | |
2137 | ctrl &= ~IXGB_CTRL0_VME; | |
2138 | IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); | |
2139 | ||
2140 | /* disable VLAN filtering */ | |
2141 | ||
2142 | rctl = IXGB_READ_REG(&adapter->hw, RCTL); | |
2143 | rctl &= ~IXGB_RCTL_VFE; | |
2144 | IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); | |
2145 | } | |
2146 | ||
2147 | ixgb_irq_enable(adapter); | |
2148 | } | |
2149 | ||
2150 | static void | |
2151 | ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid) | |
2152 | { | |
8908c6cd | 2153 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
2154 | uint32_t vfta, index; |
2155 | ||
2156 | /* add VID to filter table */ | |
2157 | ||
2158 | index = (vid >> 5) & 0x7F; | |
2159 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2160 | vfta |= (1 << (vid & 0x1F)); | |
2161 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2162 | } | |
2163 | ||
2164 | static void | |
2165 | ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid) | |
2166 | { | |
8908c6cd | 2167 | struct ixgb_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
2168 | uint32_t vfta, index; |
2169 | ||
2170 | ixgb_irq_disable(adapter); | |
2171 | ||
2172 | if(adapter->vlgrp) | |
2173 | adapter->vlgrp->vlan_devices[vid] = NULL; | |
2174 | ||
2175 | ixgb_irq_enable(adapter); | |
2176 | ||
2177 | /* remove VID from filter table*/ | |
2178 | ||
2179 | index = (vid >> 5) & 0x7F; | |
2180 | vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); | |
2181 | vfta &= ~(1 << (vid & 0x1F)); | |
2182 | ixgb_write_vfta(&adapter->hw, index, vfta); | |
2183 | } | |
2184 | ||
2185 | static void | |
2186 | ixgb_restore_vlan(struct ixgb_adapter *adapter) | |
2187 | { | |
2188 | ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp); | |
2189 | ||
2190 | if(adapter->vlgrp) { | |
2191 | uint16_t vid; | |
2192 | for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { | |
2193 | if(!adapter->vlgrp->vlan_devices[vid]) | |
2194 | continue; | |
2195 | ixgb_vlan_rx_add_vid(adapter->netdev, vid); | |
2196 | } | |
2197 | } | |
2198 | } | |
2199 | ||
1da177e4 LT |
2200 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2201 | /* | |
2202 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2203 | * without having to re-enable interrupts. It's not called while | |
2204 | * the interrupt routine is executing. | |
2205 | */ | |
2206 | ||
2207 | static void ixgb_netpoll(struct net_device *dev) | |
2208 | { | |
2209 | struct ixgb_adapter *adapter = dev->priv; | |
ac79c82e | 2210 | |
1da177e4 LT |
2211 | disable_irq(adapter->pdev->irq); |
2212 | ixgb_intr(adapter->pdev->irq, dev, NULL); | |
2213 | enable_irq(adapter->pdev->irq); | |
2214 | } | |
2215 | #endif | |
2216 | ||
2217 | /* ixgb_main.c */ |