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1 | /******************************************************************************* |
2 | ||
3 | Intel(R) 82576 Virtual Function Linux driver | |
4 | Copyright(c) 2009 Intel Corporation. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms and conditions of the GNU General Public License, | |
8 | version 2, as published by the Free Software Foundation. | |
9 | ||
10 | This program is distributed in the hope it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., | |
17 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in | |
20 | the file called "COPYING". | |
21 | ||
22 | Contact Information: | |
23 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
24 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | ||
26 | *******************************************************************************/ | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/vmalloc.h> | |
33 | #include <linux/pagemap.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/tcp.h> | |
37 | #include <linux/ipv6.h> | |
38 | #include <net/checksum.h> | |
39 | #include <net/ip6_checksum.h> | |
40 | #include <linux/mii.h> | |
41 | #include <linux/ethtool.h> | |
42 | #include <linux/if_vlan.h> | |
43 | #include <linux/pm_qos_params.h> | |
44 | ||
45 | #include "igbvf.h" | |
46 | ||
47 | #define DRV_VERSION "1.0.0-k0" | |
48 | char igbvf_driver_name[] = "igbvf"; | |
49 | const char igbvf_driver_version[] = DRV_VERSION; | |
50 | static const char igbvf_driver_string[] = | |
51 | "Intel(R) Virtual Function Network Driver"; | |
52 | static const char igbvf_copyright[] = "Copyright (c) 2009 Intel Corporation."; | |
53 | ||
54 | static int igbvf_poll(struct napi_struct *napi, int budget); | |
55 | ||
56 | static struct igbvf_info igbvf_vf_info = { | |
57 | .mac = e1000_vfadapt, | |
58 | .flags = FLAG_HAS_JUMBO_FRAMES | |
59 | | FLAG_RX_CSUM_ENABLED, | |
60 | .pba = 10, | |
61 | .init_ops = e1000_init_function_pointers_vf, | |
62 | }; | |
63 | ||
64 | static const struct igbvf_info *igbvf_info_tbl[] = { | |
65 | [board_vf] = &igbvf_vf_info, | |
66 | }; | |
67 | ||
68 | /** | |
69 | * igbvf_desc_unused - calculate if we have unused descriptors | |
70 | **/ | |
71 | static int igbvf_desc_unused(struct igbvf_ring *ring) | |
72 | { | |
73 | if (ring->next_to_clean > ring->next_to_use) | |
74 | return ring->next_to_clean - ring->next_to_use - 1; | |
75 | ||
76 | return ring->count + ring->next_to_clean - ring->next_to_use - 1; | |
77 | } | |
78 | ||
79 | /** | |
80 | * igbvf_receive_skb - helper function to handle Rx indications | |
81 | * @adapter: board private structure | |
82 | * @status: descriptor status field as written by hardware | |
83 | * @vlan: descriptor vlan field as written by hardware (no le/be conversion) | |
84 | * @skb: pointer to sk_buff to be indicated to stack | |
85 | **/ | |
86 | static void igbvf_receive_skb(struct igbvf_adapter *adapter, | |
87 | struct net_device *netdev, | |
88 | struct sk_buff *skb, | |
89 | u32 status, u16 vlan) | |
90 | { | |
91 | if (adapter->vlgrp && (status & E1000_RXD_STAT_VP)) | |
92 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, | |
93 | le16_to_cpu(vlan) & | |
94 | E1000_RXD_SPC_VLAN_MASK); | |
95 | else | |
96 | netif_receive_skb(skb); | |
97 | ||
98 | netdev->last_rx = jiffies; | |
99 | } | |
100 | ||
101 | static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, | |
102 | u32 status_err, struct sk_buff *skb) | |
103 | { | |
104 | skb->ip_summed = CHECKSUM_NONE; | |
105 | ||
106 | /* Ignore Checksum bit is set or checksum is disabled through ethtool */ | |
107 | if ((status_err & E1000_RXD_STAT_IXSM)) | |
108 | return; | |
109 | /* TCP/UDP checksum error bit is set */ | |
110 | if (status_err & | |
111 | (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { | |
112 | /* let the stack verify checksum errors */ | |
113 | adapter->hw_csum_err++; | |
114 | return; | |
115 | } | |
116 | /* It must be a TCP or UDP packet with a valid checksum */ | |
117 | if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) | |
118 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
119 | ||
120 | adapter->hw_csum_good++; | |
121 | } | |
122 | ||
123 | /** | |
124 | * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split | |
125 | * @rx_ring: address of ring structure to repopulate | |
126 | * @cleaned_count: number of buffers to repopulate | |
127 | **/ | |
128 | static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, | |
129 | int cleaned_count) | |
130 | { | |
131 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
132 | struct net_device *netdev = adapter->netdev; | |
133 | struct pci_dev *pdev = adapter->pdev; | |
134 | union e1000_adv_rx_desc *rx_desc; | |
135 | struct igbvf_buffer *buffer_info; | |
136 | struct sk_buff *skb; | |
137 | unsigned int i; | |
138 | int bufsz; | |
139 | ||
140 | i = rx_ring->next_to_use; | |
141 | buffer_info = &rx_ring->buffer_info[i]; | |
142 | ||
143 | if (adapter->rx_ps_hdr_size) | |
144 | bufsz = adapter->rx_ps_hdr_size; | |
145 | else | |
146 | bufsz = adapter->rx_buffer_len; | |
147 | bufsz += NET_IP_ALIGN; | |
148 | ||
149 | while (cleaned_count--) { | |
150 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
151 | ||
152 | if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { | |
153 | if (!buffer_info->page) { | |
154 | buffer_info->page = alloc_page(GFP_ATOMIC); | |
155 | if (!buffer_info->page) { | |
156 | adapter->alloc_rx_buff_failed++; | |
157 | goto no_buffers; | |
158 | } | |
159 | buffer_info->page_offset = 0; | |
160 | } else { | |
161 | buffer_info->page_offset ^= PAGE_SIZE / 2; | |
162 | } | |
163 | buffer_info->page_dma = | |
164 | pci_map_page(pdev, buffer_info->page, | |
165 | buffer_info->page_offset, | |
166 | PAGE_SIZE / 2, | |
167 | PCI_DMA_FROMDEVICE); | |
168 | } | |
169 | ||
170 | if (!buffer_info->skb) { | |
171 | skb = netdev_alloc_skb(netdev, bufsz); | |
172 | if (!skb) { | |
173 | adapter->alloc_rx_buff_failed++; | |
174 | goto no_buffers; | |
175 | } | |
176 | ||
177 | /* Make buffer alignment 2 beyond a 16 byte boundary | |
178 | * this will result in a 16 byte aligned IP header after | |
179 | * the 14 byte MAC header is removed | |
180 | */ | |
181 | skb_reserve(skb, NET_IP_ALIGN); | |
182 | ||
183 | buffer_info->skb = skb; | |
184 | buffer_info->dma = pci_map_single(pdev, skb->data, | |
185 | bufsz, | |
186 | PCI_DMA_FROMDEVICE); | |
187 | } | |
188 | /* Refresh the desc even if buffer_addrs didn't change because | |
189 | * each write-back erases this info. */ | |
190 | if (adapter->rx_ps_hdr_size) { | |
191 | rx_desc->read.pkt_addr = | |
192 | cpu_to_le64(buffer_info->page_dma); | |
193 | rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); | |
194 | } else { | |
195 | rx_desc->read.pkt_addr = | |
196 | cpu_to_le64(buffer_info->dma); | |
197 | rx_desc->read.hdr_addr = 0; | |
198 | } | |
199 | ||
200 | i++; | |
201 | if (i == rx_ring->count) | |
202 | i = 0; | |
203 | buffer_info = &rx_ring->buffer_info[i]; | |
204 | } | |
205 | ||
206 | no_buffers: | |
207 | if (rx_ring->next_to_use != i) { | |
208 | rx_ring->next_to_use = i; | |
209 | if (i == 0) | |
210 | i = (rx_ring->count - 1); | |
211 | else | |
212 | i--; | |
213 | ||
214 | /* Force memory writes to complete before letting h/w | |
215 | * know there are new descriptors to fetch. (Only | |
216 | * applicable for weak-ordered memory model archs, | |
217 | * such as IA-64). */ | |
218 | wmb(); | |
219 | writel(i, adapter->hw.hw_addr + rx_ring->tail); | |
220 | } | |
221 | } | |
222 | ||
223 | /** | |
224 | * igbvf_clean_rx_irq - Send received data up the network stack; legacy | |
225 | * @adapter: board private structure | |
226 | * | |
227 | * the return value indicates whether actual cleaning was done, there | |
228 | * is no guarantee that everything was cleaned | |
229 | **/ | |
230 | static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, | |
231 | int *work_done, int work_to_do) | |
232 | { | |
233 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
234 | struct net_device *netdev = adapter->netdev; | |
235 | struct pci_dev *pdev = adapter->pdev; | |
236 | union e1000_adv_rx_desc *rx_desc, *next_rxd; | |
237 | struct igbvf_buffer *buffer_info, *next_buffer; | |
238 | struct sk_buff *skb; | |
239 | bool cleaned = false; | |
240 | int cleaned_count = 0; | |
241 | unsigned int total_bytes = 0, total_packets = 0; | |
242 | unsigned int i; | |
243 | u32 length, hlen, staterr; | |
244 | ||
245 | i = rx_ring->next_to_clean; | |
246 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
247 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
248 | ||
249 | while (staterr & E1000_RXD_STAT_DD) { | |
250 | if (*work_done >= work_to_do) | |
251 | break; | |
252 | (*work_done)++; | |
253 | ||
254 | buffer_info = &rx_ring->buffer_info[i]; | |
255 | ||
256 | /* HW will not DMA in data larger than the given buffer, even | |
257 | * if it parses the (NFS, of course) header to be larger. In | |
258 | * that case, it fills the header buffer and spills the rest | |
259 | * into the page. | |
260 | */ | |
261 | hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) & | |
262 | E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; | |
263 | if (hlen > adapter->rx_ps_hdr_size) | |
264 | hlen = adapter->rx_ps_hdr_size; | |
265 | ||
266 | length = le16_to_cpu(rx_desc->wb.upper.length); | |
267 | cleaned = true; | |
268 | cleaned_count++; | |
269 | ||
270 | skb = buffer_info->skb; | |
271 | prefetch(skb->data - NET_IP_ALIGN); | |
272 | buffer_info->skb = NULL; | |
273 | if (!adapter->rx_ps_hdr_size) { | |
274 | pci_unmap_single(pdev, buffer_info->dma, | |
275 | adapter->rx_buffer_len, | |
276 | PCI_DMA_FROMDEVICE); | |
277 | buffer_info->dma = 0; | |
278 | skb_put(skb, length); | |
279 | goto send_up; | |
280 | } | |
281 | ||
282 | if (!skb_shinfo(skb)->nr_frags) { | |
283 | pci_unmap_single(pdev, buffer_info->dma, | |
284 | adapter->rx_ps_hdr_size + NET_IP_ALIGN, | |
285 | PCI_DMA_FROMDEVICE); | |
286 | skb_put(skb, hlen); | |
287 | } | |
288 | ||
289 | if (length) { | |
290 | pci_unmap_page(pdev, buffer_info->page_dma, | |
291 | PAGE_SIZE / 2, | |
292 | PCI_DMA_FROMDEVICE); | |
293 | buffer_info->page_dma = 0; | |
294 | ||
295 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++, | |
296 | buffer_info->page, | |
297 | buffer_info->page_offset, | |
298 | length); | |
299 | ||
300 | if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || | |
301 | (page_count(buffer_info->page) != 1)) | |
302 | buffer_info->page = NULL; | |
303 | else | |
304 | get_page(buffer_info->page); | |
305 | ||
306 | skb->len += length; | |
307 | skb->data_len += length; | |
308 | skb->truesize += length; | |
309 | } | |
310 | send_up: | |
311 | i++; | |
312 | if (i == rx_ring->count) | |
313 | i = 0; | |
314 | next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
315 | prefetch(next_rxd); | |
316 | next_buffer = &rx_ring->buffer_info[i]; | |
317 | ||
318 | if (!(staterr & E1000_RXD_STAT_EOP)) { | |
319 | buffer_info->skb = next_buffer->skb; | |
320 | buffer_info->dma = next_buffer->dma; | |
321 | next_buffer->skb = skb; | |
322 | next_buffer->dma = 0; | |
323 | goto next_desc; | |
324 | } | |
325 | ||
326 | if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { | |
327 | dev_kfree_skb_irq(skb); | |
328 | goto next_desc; | |
329 | } | |
330 | ||
331 | total_bytes += skb->len; | |
332 | total_packets++; | |
333 | ||
334 | igbvf_rx_checksum_adv(adapter, staterr, skb); | |
335 | ||
336 | skb->protocol = eth_type_trans(skb, netdev); | |
337 | ||
338 | igbvf_receive_skb(adapter, netdev, skb, staterr, | |
339 | rx_desc->wb.upper.vlan); | |
340 | ||
341 | netdev->last_rx = jiffies; | |
342 | ||
343 | next_desc: | |
344 | rx_desc->wb.upper.status_error = 0; | |
345 | ||
346 | /* return some buffers to hardware, one at a time is too slow */ | |
347 | if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { | |
348 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
349 | cleaned_count = 0; | |
350 | } | |
351 | ||
352 | /* use prefetched values */ | |
353 | rx_desc = next_rxd; | |
354 | buffer_info = next_buffer; | |
355 | ||
356 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
357 | } | |
358 | ||
359 | rx_ring->next_to_clean = i; | |
360 | cleaned_count = igbvf_desc_unused(rx_ring); | |
361 | ||
362 | if (cleaned_count) | |
363 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
364 | ||
365 | adapter->total_rx_packets += total_packets; | |
366 | adapter->total_rx_bytes += total_bytes; | |
367 | adapter->net_stats.rx_bytes += total_bytes; | |
368 | adapter->net_stats.rx_packets += total_packets; | |
369 | return cleaned; | |
370 | } | |
371 | ||
372 | static void igbvf_put_txbuf(struct igbvf_adapter *adapter, | |
373 | struct igbvf_buffer *buffer_info) | |
374 | { | |
375 | buffer_info->dma = 0; | |
376 | if (buffer_info->skb) { | |
377 | skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb, | |
378 | DMA_TO_DEVICE); | |
379 | dev_kfree_skb_any(buffer_info->skb); | |
380 | buffer_info->skb = NULL; | |
381 | } | |
382 | buffer_info->time_stamp = 0; | |
383 | } | |
384 | ||
385 | static void igbvf_print_tx_hang(struct igbvf_adapter *adapter) | |
386 | { | |
387 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
388 | unsigned int i = tx_ring->next_to_clean; | |
389 | unsigned int eop = tx_ring->buffer_info[i].next_to_watch; | |
390 | union e1000_adv_tx_desc *eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); | |
391 | ||
392 | /* detected Tx unit hang */ | |
393 | dev_err(&adapter->pdev->dev, | |
394 | "Detected Tx Unit Hang:\n" | |
395 | " TDH <%x>\n" | |
396 | " TDT <%x>\n" | |
397 | " next_to_use <%x>\n" | |
398 | " next_to_clean <%x>\n" | |
399 | "buffer_info[next_to_clean]:\n" | |
400 | " time_stamp <%lx>\n" | |
401 | " next_to_watch <%x>\n" | |
402 | " jiffies <%lx>\n" | |
403 | " next_to_watch.status <%x>\n", | |
404 | readl(adapter->hw.hw_addr + tx_ring->head), | |
405 | readl(adapter->hw.hw_addr + tx_ring->tail), | |
406 | tx_ring->next_to_use, | |
407 | tx_ring->next_to_clean, | |
408 | tx_ring->buffer_info[eop].time_stamp, | |
409 | eop, | |
410 | jiffies, | |
411 | eop_desc->wb.status); | |
412 | } | |
413 | ||
414 | /** | |
415 | * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) | |
416 | * @adapter: board private structure | |
417 | * | |
418 | * Return 0 on success, negative on failure | |
419 | **/ | |
420 | int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, | |
421 | struct igbvf_ring *tx_ring) | |
422 | { | |
423 | struct pci_dev *pdev = adapter->pdev; | |
424 | int size; | |
425 | ||
426 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
427 | tx_ring->buffer_info = vmalloc(size); | |
428 | if (!tx_ring->buffer_info) | |
429 | goto err; | |
430 | memset(tx_ring->buffer_info, 0, size); | |
431 | ||
432 | /* round up to nearest 4K */ | |
433 | tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); | |
434 | tx_ring->size = ALIGN(tx_ring->size, 4096); | |
435 | ||
436 | tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size, | |
437 | &tx_ring->dma); | |
438 | ||
439 | if (!tx_ring->desc) | |
440 | goto err; | |
441 | ||
442 | tx_ring->adapter = adapter; | |
443 | tx_ring->next_to_use = 0; | |
444 | tx_ring->next_to_clean = 0; | |
445 | ||
446 | return 0; | |
447 | err: | |
448 | vfree(tx_ring->buffer_info); | |
449 | dev_err(&adapter->pdev->dev, | |
450 | "Unable to allocate memory for the transmit descriptor ring\n"); | |
451 | return -ENOMEM; | |
452 | } | |
453 | ||
454 | /** | |
455 | * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) | |
456 | * @adapter: board private structure | |
457 | * | |
458 | * Returns 0 on success, negative on failure | |
459 | **/ | |
460 | int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, | |
461 | struct igbvf_ring *rx_ring) | |
462 | { | |
463 | struct pci_dev *pdev = adapter->pdev; | |
464 | int size, desc_len; | |
465 | ||
466 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
467 | rx_ring->buffer_info = vmalloc(size); | |
468 | if (!rx_ring->buffer_info) | |
469 | goto err; | |
470 | memset(rx_ring->buffer_info, 0, size); | |
471 | ||
472 | desc_len = sizeof(union e1000_adv_rx_desc); | |
473 | ||
474 | /* Round up to nearest 4K */ | |
475 | rx_ring->size = rx_ring->count * desc_len; | |
476 | rx_ring->size = ALIGN(rx_ring->size, 4096); | |
477 | ||
478 | rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, | |
479 | &rx_ring->dma); | |
480 | ||
481 | if (!rx_ring->desc) | |
482 | goto err; | |
483 | ||
484 | rx_ring->next_to_clean = 0; | |
485 | rx_ring->next_to_use = 0; | |
486 | ||
487 | rx_ring->adapter = adapter; | |
488 | ||
489 | return 0; | |
490 | ||
491 | err: | |
492 | vfree(rx_ring->buffer_info); | |
493 | rx_ring->buffer_info = NULL; | |
494 | dev_err(&adapter->pdev->dev, | |
495 | "Unable to allocate memory for the receive descriptor ring\n"); | |
496 | return -ENOMEM; | |
497 | } | |
498 | ||
499 | /** | |
500 | * igbvf_clean_tx_ring - Free Tx Buffers | |
501 | * @tx_ring: ring to be cleaned | |
502 | **/ | |
503 | static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) | |
504 | { | |
505 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
506 | struct igbvf_buffer *buffer_info; | |
507 | unsigned long size; | |
508 | unsigned int i; | |
509 | ||
510 | if (!tx_ring->buffer_info) | |
511 | return; | |
512 | ||
513 | /* Free all the Tx ring sk_buffs */ | |
514 | for (i = 0; i < tx_ring->count; i++) { | |
515 | buffer_info = &tx_ring->buffer_info[i]; | |
516 | igbvf_put_txbuf(adapter, buffer_info); | |
517 | } | |
518 | ||
519 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
520 | memset(tx_ring->buffer_info, 0, size); | |
521 | ||
522 | /* Zero out the descriptor ring */ | |
523 | memset(tx_ring->desc, 0, tx_ring->size); | |
524 | ||
525 | tx_ring->next_to_use = 0; | |
526 | tx_ring->next_to_clean = 0; | |
527 | ||
528 | writel(0, adapter->hw.hw_addr + tx_ring->head); | |
529 | writel(0, adapter->hw.hw_addr + tx_ring->tail); | |
530 | } | |
531 | ||
532 | /** | |
533 | * igbvf_free_tx_resources - Free Tx Resources per Queue | |
534 | * @tx_ring: ring to free resources from | |
535 | * | |
536 | * Free all transmit software resources | |
537 | **/ | |
538 | void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) | |
539 | { | |
540 | struct pci_dev *pdev = tx_ring->adapter->pdev; | |
541 | ||
542 | igbvf_clean_tx_ring(tx_ring); | |
543 | ||
544 | vfree(tx_ring->buffer_info); | |
545 | tx_ring->buffer_info = NULL; | |
546 | ||
547 | pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma); | |
548 | ||
549 | tx_ring->desc = NULL; | |
550 | } | |
551 | ||
552 | /** | |
553 | * igbvf_clean_rx_ring - Free Rx Buffers per Queue | |
554 | * @adapter: board private structure | |
555 | **/ | |
556 | static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) | |
557 | { | |
558 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
559 | struct igbvf_buffer *buffer_info; | |
560 | struct pci_dev *pdev = adapter->pdev; | |
561 | unsigned long size; | |
562 | unsigned int i; | |
563 | ||
564 | if (!rx_ring->buffer_info) | |
565 | return; | |
566 | ||
567 | /* Free all the Rx ring sk_buffs */ | |
568 | for (i = 0; i < rx_ring->count; i++) { | |
569 | buffer_info = &rx_ring->buffer_info[i]; | |
570 | if (buffer_info->dma) { | |
571 | if (adapter->rx_ps_hdr_size){ | |
572 | pci_unmap_single(pdev, buffer_info->dma, | |
573 | adapter->rx_ps_hdr_size, | |
574 | PCI_DMA_FROMDEVICE); | |
575 | } else { | |
576 | pci_unmap_single(pdev, buffer_info->dma, | |
577 | adapter->rx_buffer_len, | |
578 | PCI_DMA_FROMDEVICE); | |
579 | } | |
580 | buffer_info->dma = 0; | |
581 | } | |
582 | ||
583 | if (buffer_info->skb) { | |
584 | dev_kfree_skb(buffer_info->skb); | |
585 | buffer_info->skb = NULL; | |
586 | } | |
587 | ||
588 | if (buffer_info->page) { | |
589 | if (buffer_info->page_dma) | |
590 | pci_unmap_page(pdev, buffer_info->page_dma, | |
591 | PAGE_SIZE / 2, | |
592 | PCI_DMA_FROMDEVICE); | |
593 | put_page(buffer_info->page); | |
594 | buffer_info->page = NULL; | |
595 | buffer_info->page_dma = 0; | |
596 | buffer_info->page_offset = 0; | |
597 | } | |
598 | } | |
599 | ||
600 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
601 | memset(rx_ring->buffer_info, 0, size); | |
602 | ||
603 | /* Zero out the descriptor ring */ | |
604 | memset(rx_ring->desc, 0, rx_ring->size); | |
605 | ||
606 | rx_ring->next_to_clean = 0; | |
607 | rx_ring->next_to_use = 0; | |
608 | ||
609 | writel(0, adapter->hw.hw_addr + rx_ring->head); | |
610 | writel(0, adapter->hw.hw_addr + rx_ring->tail); | |
611 | } | |
612 | ||
613 | /** | |
614 | * igbvf_free_rx_resources - Free Rx Resources | |
615 | * @rx_ring: ring to clean the resources from | |
616 | * | |
617 | * Free all receive software resources | |
618 | **/ | |
619 | ||
620 | void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) | |
621 | { | |
622 | struct pci_dev *pdev = rx_ring->adapter->pdev; | |
623 | ||
624 | igbvf_clean_rx_ring(rx_ring); | |
625 | ||
626 | vfree(rx_ring->buffer_info); | |
627 | rx_ring->buffer_info = NULL; | |
628 | ||
629 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, | |
630 | rx_ring->dma); | |
631 | rx_ring->desc = NULL; | |
632 | } | |
633 | ||
634 | /** | |
635 | * igbvf_update_itr - update the dynamic ITR value based on statistics | |
636 | * @adapter: pointer to adapter | |
637 | * @itr_setting: current adapter->itr | |
638 | * @packets: the number of packets during this measurement interval | |
639 | * @bytes: the number of bytes during this measurement interval | |
640 | * | |
641 | * Stores a new ITR value based on packets and byte | |
642 | * counts during the last interrupt. The advantage of per interrupt | |
643 | * computation is faster updates and more accurate ITR for the current | |
644 | * traffic pattern. Constants in this function were computed | |
645 | * based on theoretical maximum wire speed and thresholds were set based | |
646 | * on testing data as well as attempting to minimize response time | |
647 | * while increasing bulk throughput. This functionality is controlled | |
648 | * by the InterruptThrottleRate module parameter. | |
649 | **/ | |
650 | static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter, | |
651 | u16 itr_setting, int packets, | |
652 | int bytes) | |
653 | { | |
654 | unsigned int retval = itr_setting; | |
655 | ||
656 | if (packets == 0) | |
657 | goto update_itr_done; | |
658 | ||
659 | switch (itr_setting) { | |
660 | case lowest_latency: | |
661 | /* handle TSO and jumbo frames */ | |
662 | if (bytes/packets > 8000) | |
663 | retval = bulk_latency; | |
664 | else if ((packets < 5) && (bytes > 512)) | |
665 | retval = low_latency; | |
666 | break; | |
667 | case low_latency: /* 50 usec aka 20000 ints/s */ | |
668 | if (bytes > 10000) { | |
669 | /* this if handles the TSO accounting */ | |
670 | if (bytes/packets > 8000) | |
671 | retval = bulk_latency; | |
672 | else if ((packets < 10) || ((bytes/packets) > 1200)) | |
673 | retval = bulk_latency; | |
674 | else if ((packets > 35)) | |
675 | retval = lowest_latency; | |
676 | } else if (bytes/packets > 2000) { | |
677 | retval = bulk_latency; | |
678 | } else if (packets <= 2 && bytes < 512) { | |
679 | retval = lowest_latency; | |
680 | } | |
681 | break; | |
682 | case bulk_latency: /* 250 usec aka 4000 ints/s */ | |
683 | if (bytes > 25000) { | |
684 | if (packets > 35) | |
685 | retval = low_latency; | |
686 | } else if (bytes < 6000) { | |
687 | retval = low_latency; | |
688 | } | |
689 | break; | |
690 | } | |
691 | ||
692 | update_itr_done: | |
693 | return retval; | |
694 | } | |
695 | ||
696 | static void igbvf_set_itr(struct igbvf_adapter *adapter) | |
697 | { | |
698 | struct e1000_hw *hw = &adapter->hw; | |
699 | u16 current_itr; | |
700 | u32 new_itr = adapter->itr; | |
701 | ||
702 | adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr, | |
703 | adapter->total_tx_packets, | |
704 | adapter->total_tx_bytes); | |
705 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ | |
706 | if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) | |
707 | adapter->tx_itr = low_latency; | |
708 | ||
709 | adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr, | |
710 | adapter->total_rx_packets, | |
711 | adapter->total_rx_bytes); | |
712 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ | |
713 | if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) | |
714 | adapter->rx_itr = low_latency; | |
715 | ||
716 | current_itr = max(adapter->rx_itr, adapter->tx_itr); | |
717 | ||
718 | switch (current_itr) { | |
719 | /* counts and packets in update_itr are dependent on these numbers */ | |
720 | case lowest_latency: | |
721 | new_itr = 70000; | |
722 | break; | |
723 | case low_latency: | |
724 | new_itr = 20000; /* aka hwitr = ~200 */ | |
725 | break; | |
726 | case bulk_latency: | |
727 | new_itr = 4000; | |
728 | break; | |
729 | default: | |
730 | break; | |
731 | } | |
732 | ||
733 | if (new_itr != adapter->itr) { | |
734 | /* | |
735 | * this attempts to bias the interrupt rate towards Bulk | |
736 | * by adding intermediate steps when interrupt rate is | |
737 | * increasing | |
738 | */ | |
739 | new_itr = new_itr > adapter->itr ? | |
740 | min(adapter->itr + (new_itr >> 2), new_itr) : | |
741 | new_itr; | |
742 | adapter->itr = new_itr; | |
743 | adapter->rx_ring->itr_val = 1952; | |
744 | ||
745 | if (adapter->msix_entries) | |
746 | adapter->rx_ring->set_itr = 1; | |
747 | else | |
748 | ew32(ITR, 1952); | |
749 | } | |
750 | } | |
751 | ||
752 | /** | |
753 | * igbvf_clean_tx_irq - Reclaim resources after transmit completes | |
754 | * @adapter: board private structure | |
755 | * returns true if ring is completely cleaned | |
756 | **/ | |
757 | static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) | |
758 | { | |
759 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
760 | struct e1000_hw *hw = &adapter->hw; | |
761 | struct net_device *netdev = adapter->netdev; | |
762 | struct igbvf_buffer *buffer_info; | |
763 | struct sk_buff *skb; | |
764 | union e1000_adv_tx_desc *tx_desc, *eop_desc; | |
765 | unsigned int total_bytes = 0, total_packets = 0; | |
766 | unsigned int i, eop, count = 0; | |
767 | bool cleaned = false; | |
768 | ||
769 | i = tx_ring->next_to_clean; | |
770 | eop = tx_ring->buffer_info[i].next_to_watch; | |
771 | eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); | |
772 | ||
773 | while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) && | |
774 | (count < tx_ring->count)) { | |
775 | for (cleaned = false; !cleaned; count++) { | |
776 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
777 | buffer_info = &tx_ring->buffer_info[i]; | |
778 | cleaned = (i == eop); | |
779 | skb = buffer_info->skb; | |
780 | ||
781 | if (skb) { | |
782 | unsigned int segs, bytecount; | |
783 | ||
784 | /* gso_segs is currently only valid for tcp */ | |
785 | segs = skb_shinfo(skb)->gso_segs ?: 1; | |
786 | /* multiply data chunks by size of headers */ | |
787 | bytecount = ((segs - 1) * skb_headlen(skb)) + | |
788 | skb->len; | |
789 | total_packets += segs; | |
790 | total_bytes += bytecount; | |
791 | } | |
792 | ||
793 | igbvf_put_txbuf(adapter, buffer_info); | |
794 | tx_desc->wb.status = 0; | |
795 | ||
796 | i++; | |
797 | if (i == tx_ring->count) | |
798 | i = 0; | |
799 | } | |
800 | eop = tx_ring->buffer_info[i].next_to_watch; | |
801 | eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); | |
802 | } | |
803 | ||
804 | tx_ring->next_to_clean = i; | |
805 | ||
806 | if (unlikely(count && | |
807 | netif_carrier_ok(netdev) && | |
808 | igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { | |
809 | /* Make sure that anybody stopping the queue after this | |
810 | * sees the new next_to_clean. | |
811 | */ | |
812 | smp_mb(); | |
813 | if (netif_queue_stopped(netdev) && | |
814 | !(test_bit(__IGBVF_DOWN, &adapter->state))) { | |
815 | netif_wake_queue(netdev); | |
816 | ++adapter->restart_queue; | |
817 | } | |
818 | } | |
819 | ||
820 | if (adapter->detect_tx_hung) { | |
821 | /* Detect a transmit hang in hardware, this serializes the | |
822 | * check with the clearing of time_stamp and movement of i */ | |
823 | adapter->detect_tx_hung = false; | |
824 | if (tx_ring->buffer_info[i].time_stamp && | |
825 | time_after(jiffies, tx_ring->buffer_info[i].time_stamp + | |
826 | (adapter->tx_timeout_factor * HZ)) | |
827 | && !(er32(STATUS) & E1000_STATUS_TXOFF)) { | |
828 | ||
829 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
830 | /* detected Tx unit hang */ | |
831 | igbvf_print_tx_hang(adapter); | |
832 | ||
833 | netif_stop_queue(netdev); | |
834 | } | |
835 | } | |
836 | adapter->net_stats.tx_bytes += total_bytes; | |
837 | adapter->net_stats.tx_packets += total_packets; | |
838 | return (count < tx_ring->count); | |
839 | } | |
840 | ||
841 | static irqreturn_t igbvf_msix_other(int irq, void *data) | |
842 | { | |
843 | struct net_device *netdev = data; | |
844 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
845 | struct e1000_hw *hw = &adapter->hw; | |
846 | ||
847 | adapter->int_counter1++; | |
848 | ||
849 | netif_carrier_off(netdev); | |
850 | hw->mac.get_link_status = 1; | |
851 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
852 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
853 | ||
854 | ew32(EIMS, adapter->eims_other); | |
855 | ||
856 | return IRQ_HANDLED; | |
857 | } | |
858 | ||
859 | static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) | |
860 | { | |
861 | struct net_device *netdev = data; | |
862 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
863 | struct e1000_hw *hw = &adapter->hw; | |
864 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
865 | ||
866 | ||
867 | adapter->total_tx_bytes = 0; | |
868 | adapter->total_tx_packets = 0; | |
869 | ||
870 | /* auto mask will automatically reenable the interrupt when we write | |
871 | * EICS */ | |
872 | if (!igbvf_clean_tx_irq(tx_ring)) | |
873 | /* Ring was not completely cleaned, so fire another interrupt */ | |
874 | ew32(EICS, tx_ring->eims_value); | |
875 | else | |
876 | ew32(EIMS, tx_ring->eims_value); | |
877 | ||
878 | return IRQ_HANDLED; | |
879 | } | |
880 | ||
881 | static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) | |
882 | { | |
883 | struct net_device *netdev = data; | |
884 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
885 | ||
886 | adapter->int_counter0++; | |
887 | ||
888 | /* Write the ITR value calculated at the end of the | |
889 | * previous interrupt. | |
890 | */ | |
891 | if (adapter->rx_ring->set_itr) { | |
892 | writel(adapter->rx_ring->itr_val, | |
893 | adapter->hw.hw_addr + adapter->rx_ring->itr_register); | |
894 | adapter->rx_ring->set_itr = 0; | |
895 | } | |
896 | ||
897 | if (napi_schedule_prep(&adapter->rx_ring->napi)) { | |
898 | adapter->total_rx_bytes = 0; | |
899 | adapter->total_rx_packets = 0; | |
900 | __napi_schedule(&adapter->rx_ring->napi); | |
901 | } | |
902 | ||
903 | return IRQ_HANDLED; | |
904 | } | |
905 | ||
906 | #define IGBVF_NO_QUEUE -1 | |
907 | ||
908 | static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, | |
909 | int tx_queue, int msix_vector) | |
910 | { | |
911 | struct e1000_hw *hw = &adapter->hw; | |
912 | u32 ivar, index; | |
913 | ||
914 | /* 82576 uses a table-based method for assigning vectors. | |
915 | Each queue has a single entry in the table to which we write | |
916 | a vector number along with a "valid" bit. Sadly, the layout | |
917 | of the table is somewhat counterintuitive. */ | |
918 | if (rx_queue > IGBVF_NO_QUEUE) { | |
919 | index = (rx_queue >> 1); | |
920 | ivar = array_er32(IVAR0, index); | |
921 | if (rx_queue & 0x1) { | |
922 | /* vector goes into third byte of register */ | |
923 | ivar = ivar & 0xFF00FFFF; | |
924 | ivar |= (msix_vector | E1000_IVAR_VALID) << 16; | |
925 | } else { | |
926 | /* vector goes into low byte of register */ | |
927 | ivar = ivar & 0xFFFFFF00; | |
928 | ivar |= msix_vector | E1000_IVAR_VALID; | |
929 | } | |
930 | adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; | |
931 | array_ew32(IVAR0, index, ivar); | |
932 | } | |
933 | if (tx_queue > IGBVF_NO_QUEUE) { | |
934 | index = (tx_queue >> 1); | |
935 | ivar = array_er32(IVAR0, index); | |
936 | if (tx_queue & 0x1) { | |
937 | /* vector goes into high byte of register */ | |
938 | ivar = ivar & 0x00FFFFFF; | |
939 | ivar |= (msix_vector | E1000_IVAR_VALID) << 24; | |
940 | } else { | |
941 | /* vector goes into second byte of register */ | |
942 | ivar = ivar & 0xFFFF00FF; | |
943 | ivar |= (msix_vector | E1000_IVAR_VALID) << 8; | |
944 | } | |
945 | adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; | |
946 | array_ew32(IVAR0, index, ivar); | |
947 | } | |
948 | } | |
949 | ||
950 | /** | |
951 | * igbvf_configure_msix - Configure MSI-X hardware | |
952 | * | |
953 | * igbvf_configure_msix sets up the hardware to properly | |
954 | * generate MSI-X interrupts. | |
955 | **/ | |
956 | static void igbvf_configure_msix(struct igbvf_adapter *adapter) | |
957 | { | |
958 | u32 tmp; | |
959 | struct e1000_hw *hw = &adapter->hw; | |
960 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
961 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
962 | int vector = 0; | |
963 | ||
964 | adapter->eims_enable_mask = 0; | |
965 | ||
966 | igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); | |
967 | adapter->eims_enable_mask |= tx_ring->eims_value; | |
968 | if (tx_ring->itr_val) | |
969 | writel(tx_ring->itr_val, | |
970 | hw->hw_addr + tx_ring->itr_register); | |
971 | else | |
972 | writel(1952, hw->hw_addr + tx_ring->itr_register); | |
973 | ||
974 | igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); | |
975 | adapter->eims_enable_mask |= rx_ring->eims_value; | |
976 | if (rx_ring->itr_val) | |
977 | writel(rx_ring->itr_val, | |
978 | hw->hw_addr + rx_ring->itr_register); | |
979 | else | |
980 | writel(1952, hw->hw_addr + rx_ring->itr_register); | |
981 | ||
982 | /* set vector for other causes, i.e. link changes */ | |
983 | ||
984 | tmp = (vector++ | E1000_IVAR_VALID); | |
985 | ||
986 | ew32(IVAR_MISC, tmp); | |
987 | ||
988 | adapter->eims_enable_mask = (1 << (vector)) - 1; | |
989 | adapter->eims_other = 1 << (vector - 1); | |
990 | e1e_flush(); | |
991 | } | |
992 | ||
993 | void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) | |
994 | { | |
995 | if (adapter->msix_entries) { | |
996 | pci_disable_msix(adapter->pdev); | |
997 | kfree(adapter->msix_entries); | |
998 | adapter->msix_entries = NULL; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | /** | |
1003 | * igbvf_set_interrupt_capability - set MSI or MSI-X if supported | |
1004 | * | |
1005 | * Attempt to configure interrupts using the best available | |
1006 | * capabilities of the hardware and kernel. | |
1007 | **/ | |
1008 | void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) | |
1009 | { | |
1010 | int err = -ENOMEM; | |
1011 | int i; | |
1012 | ||
1013 | /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */ | |
1014 | adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), | |
1015 | GFP_KERNEL); | |
1016 | if (adapter->msix_entries) { | |
1017 | for (i = 0; i < 3; i++) | |
1018 | adapter->msix_entries[i].entry = i; | |
1019 | ||
1020 | err = pci_enable_msix(adapter->pdev, | |
1021 | adapter->msix_entries, 3); | |
1022 | } | |
1023 | ||
1024 | if (err) { | |
1025 | /* MSI-X failed */ | |
1026 | dev_err(&adapter->pdev->dev, | |
1027 | "Failed to initialize MSI-X interrupts.\n"); | |
1028 | igbvf_reset_interrupt_capability(adapter); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | /** | |
1033 | * igbvf_request_msix - Initialize MSI-X interrupts | |
1034 | * | |
1035 | * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the | |
1036 | * kernel. | |
1037 | **/ | |
1038 | static int igbvf_request_msix(struct igbvf_adapter *adapter) | |
1039 | { | |
1040 | struct net_device *netdev = adapter->netdev; | |
1041 | int err = 0, vector = 0; | |
1042 | ||
1043 | if (strlen(netdev->name) < (IFNAMSIZ - 5)) { | |
1044 | sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); | |
1045 | sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); | |
1046 | } else { | |
1047 | memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); | |
1048 | memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); | |
1049 | } | |
1050 | ||
1051 | err = request_irq(adapter->msix_entries[vector].vector, | |
1052 | &igbvf_intr_msix_tx, 0, adapter->tx_ring->name, | |
1053 | netdev); | |
1054 | if (err) | |
1055 | goto out; | |
1056 | ||
1057 | adapter->tx_ring->itr_register = E1000_EITR(vector); | |
1058 | adapter->tx_ring->itr_val = 1952; | |
1059 | vector++; | |
1060 | ||
1061 | err = request_irq(adapter->msix_entries[vector].vector, | |
1062 | &igbvf_intr_msix_rx, 0, adapter->rx_ring->name, | |
1063 | netdev); | |
1064 | if (err) | |
1065 | goto out; | |
1066 | ||
1067 | adapter->rx_ring->itr_register = E1000_EITR(vector); | |
1068 | adapter->rx_ring->itr_val = 1952; | |
1069 | vector++; | |
1070 | ||
1071 | err = request_irq(adapter->msix_entries[vector].vector, | |
1072 | &igbvf_msix_other, 0, netdev->name, netdev); | |
1073 | if (err) | |
1074 | goto out; | |
1075 | ||
1076 | igbvf_configure_msix(adapter); | |
1077 | return 0; | |
1078 | out: | |
1079 | return err; | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * igbvf_alloc_queues - Allocate memory for all rings | |
1084 | * @adapter: board private structure to initialize | |
1085 | **/ | |
1086 | static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter) | |
1087 | { | |
1088 | struct net_device *netdev = adapter->netdev; | |
1089 | ||
1090 | adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1091 | if (!adapter->tx_ring) | |
1092 | return -ENOMEM; | |
1093 | ||
1094 | adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1095 | if (!adapter->rx_ring) { | |
1096 | kfree(adapter->tx_ring); | |
1097 | return -ENOMEM; | |
1098 | } | |
1099 | ||
1100 | netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | /** | |
1106 | * igbvf_request_irq - initialize interrupts | |
1107 | * | |
1108 | * Attempts to configure interrupts using the best available | |
1109 | * capabilities of the hardware and kernel. | |
1110 | **/ | |
1111 | static int igbvf_request_irq(struct igbvf_adapter *adapter) | |
1112 | { | |
1113 | int err = -1; | |
1114 | ||
1115 | /* igbvf supports msi-x only */ | |
1116 | if (adapter->msix_entries) | |
1117 | err = igbvf_request_msix(adapter); | |
1118 | ||
1119 | if (!err) | |
1120 | return err; | |
1121 | ||
1122 | dev_err(&adapter->pdev->dev, | |
1123 | "Unable to allocate interrupt, Error: %d\n", err); | |
1124 | ||
1125 | return err; | |
1126 | } | |
1127 | ||
1128 | static void igbvf_free_irq(struct igbvf_adapter *adapter) | |
1129 | { | |
1130 | struct net_device *netdev = adapter->netdev; | |
1131 | int vector; | |
1132 | ||
1133 | if (adapter->msix_entries) { | |
1134 | for (vector = 0; vector < 3; vector++) | |
1135 | free_irq(adapter->msix_entries[vector].vector, netdev); | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /** | |
1140 | * igbvf_irq_disable - Mask off interrupt generation on the NIC | |
1141 | **/ | |
1142 | static void igbvf_irq_disable(struct igbvf_adapter *adapter) | |
1143 | { | |
1144 | struct e1000_hw *hw = &adapter->hw; | |
1145 | ||
1146 | ew32(EIMC, ~0); | |
1147 | ||
1148 | if (adapter->msix_entries) | |
1149 | ew32(EIAC, 0); | |
1150 | } | |
1151 | ||
1152 | /** | |
1153 | * igbvf_irq_enable - Enable default interrupt generation settings | |
1154 | **/ | |
1155 | static void igbvf_irq_enable(struct igbvf_adapter *adapter) | |
1156 | { | |
1157 | struct e1000_hw *hw = &adapter->hw; | |
1158 | ||
1159 | ew32(EIAC, adapter->eims_enable_mask); | |
1160 | ew32(EIAM, adapter->eims_enable_mask); | |
1161 | ew32(EIMS, adapter->eims_enable_mask); | |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * igbvf_poll - NAPI Rx polling callback | |
1166 | * @napi: struct associated with this polling callback | |
1167 | * @budget: amount of packets driver is allowed to process this poll | |
1168 | **/ | |
1169 | static int igbvf_poll(struct napi_struct *napi, int budget) | |
1170 | { | |
1171 | struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); | |
1172 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
1173 | struct e1000_hw *hw = &adapter->hw; | |
1174 | int work_done = 0; | |
1175 | ||
1176 | igbvf_clean_rx_irq(adapter, &work_done, budget); | |
1177 | ||
1178 | /* If not enough Rx work done, exit the polling mode */ | |
1179 | if (work_done < budget) { | |
1180 | napi_complete(napi); | |
1181 | ||
1182 | if (adapter->itr_setting & 3) | |
1183 | igbvf_set_itr(adapter); | |
1184 | ||
1185 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1186 | ew32(EIMS, adapter->rx_ring->eims_value); | |
1187 | } | |
1188 | ||
1189 | return work_done; | |
1190 | } | |
1191 | ||
1192 | /** | |
1193 | * igbvf_set_rlpml - set receive large packet maximum length | |
1194 | * @adapter: board private structure | |
1195 | * | |
1196 | * Configure the maximum size of packets that will be received | |
1197 | */ | |
1198 | static void igbvf_set_rlpml(struct igbvf_adapter *adapter) | |
1199 | { | |
1200 | int max_frame_size = adapter->max_frame_size; | |
1201 | struct e1000_hw *hw = &adapter->hw; | |
1202 | ||
1203 | if (adapter->vlgrp) | |
1204 | max_frame_size += VLAN_TAG_SIZE; | |
1205 | ||
1206 | e1000_rlpml_set_vf(hw, max_frame_size); | |
1207 | } | |
1208 | ||
1209 | static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
1210 | { | |
1211 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1212 | struct e1000_hw *hw = &adapter->hw; | |
1213 | ||
1214 | if (hw->mac.ops.set_vfta(hw, vid, true)) | |
1215 | dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); | |
1216 | } | |
1217 | ||
1218 | static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
1219 | { | |
1220 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1221 | struct e1000_hw *hw = &adapter->hw; | |
1222 | ||
1223 | igbvf_irq_disable(adapter); | |
1224 | vlan_group_set_device(adapter->vlgrp, vid, NULL); | |
1225 | ||
1226 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1227 | igbvf_irq_enable(adapter); | |
1228 | ||
1229 | if (hw->mac.ops.set_vfta(hw, vid, false)) | |
1230 | dev_err(&adapter->pdev->dev, | |
1231 | "Failed to remove vlan id %d\n", vid); | |
1232 | } | |
1233 | ||
1234 | static void igbvf_vlan_rx_register(struct net_device *netdev, | |
1235 | struct vlan_group *grp) | |
1236 | { | |
1237 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1238 | ||
1239 | adapter->vlgrp = grp; | |
1240 | } | |
1241 | ||
1242 | static void igbvf_restore_vlan(struct igbvf_adapter *adapter) | |
1243 | { | |
1244 | u16 vid; | |
1245 | ||
1246 | if (!adapter->vlgrp) | |
1247 | return; | |
1248 | ||
1249 | for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { | |
1250 | if (!vlan_group_get_device(adapter->vlgrp, vid)) | |
1251 | continue; | |
1252 | igbvf_vlan_rx_add_vid(adapter->netdev, vid); | |
1253 | } | |
1254 | ||
1255 | igbvf_set_rlpml(adapter); | |
1256 | } | |
1257 | ||
1258 | /** | |
1259 | * igbvf_configure_tx - Configure Transmit Unit after Reset | |
1260 | * @adapter: board private structure | |
1261 | * | |
1262 | * Configure the Tx unit of the MAC after a reset. | |
1263 | **/ | |
1264 | static void igbvf_configure_tx(struct igbvf_adapter *adapter) | |
1265 | { | |
1266 | struct e1000_hw *hw = &adapter->hw; | |
1267 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1268 | u64 tdba; | |
1269 | u32 txdctl, dca_txctrl; | |
1270 | ||
1271 | /* disable transmits */ | |
1272 | txdctl = er32(TXDCTL(0)); | |
1273 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
1274 | msleep(10); | |
1275 | ||
1276 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
1277 | ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); | |
1278 | tdba = tx_ring->dma; | |
1279 | ew32(TDBAL(0), (tdba & DMA_32BIT_MASK)); | |
1280 | ew32(TDBAH(0), (tdba >> 32)); | |
1281 | ew32(TDH(0), 0); | |
1282 | ew32(TDT(0), 0); | |
1283 | tx_ring->head = E1000_TDH(0); | |
1284 | tx_ring->tail = E1000_TDT(0); | |
1285 | ||
1286 | /* Turn off Relaxed Ordering on head write-backs. The writebacks | |
1287 | * MUST be delivered in order or it will completely screw up | |
1288 | * our bookeeping. | |
1289 | */ | |
1290 | dca_txctrl = er32(DCA_TXCTRL(0)); | |
1291 | dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; | |
1292 | ew32(DCA_TXCTRL(0), dca_txctrl); | |
1293 | ||
1294 | /* enable transmits */ | |
1295 | txdctl |= E1000_TXDCTL_QUEUE_ENABLE; | |
1296 | ew32(TXDCTL(0), txdctl); | |
1297 | ||
1298 | /* Setup Transmit Descriptor Settings for eop descriptor */ | |
1299 | adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; | |
1300 | ||
1301 | /* enable Report Status bit */ | |
1302 | adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; | |
1303 | ||
1304 | adapter->tx_queue_len = adapter->netdev->tx_queue_len; | |
1305 | } | |
1306 | ||
1307 | /** | |
1308 | * igbvf_setup_srrctl - configure the receive control registers | |
1309 | * @adapter: Board private structure | |
1310 | **/ | |
1311 | static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) | |
1312 | { | |
1313 | struct e1000_hw *hw = &adapter->hw; | |
1314 | u32 srrctl = 0; | |
1315 | ||
1316 | srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | | |
1317 | E1000_SRRCTL_BSIZEHDR_MASK | | |
1318 | E1000_SRRCTL_BSIZEPKT_MASK); | |
1319 | ||
1320 | /* Enable queue drop to avoid head of line blocking */ | |
1321 | srrctl |= E1000_SRRCTL_DROP_EN; | |
1322 | ||
1323 | /* Setup buffer sizes */ | |
1324 | srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> | |
1325 | E1000_SRRCTL_BSIZEPKT_SHIFT; | |
1326 | ||
1327 | if (adapter->rx_buffer_len < 2048) { | |
1328 | adapter->rx_ps_hdr_size = 0; | |
1329 | srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; | |
1330 | } else { | |
1331 | adapter->rx_ps_hdr_size = 128; | |
1332 | srrctl |= adapter->rx_ps_hdr_size << | |
1333 | E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; | |
1334 | srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; | |
1335 | } | |
1336 | ||
1337 | ew32(SRRCTL(0), srrctl); | |
1338 | } | |
1339 | ||
1340 | /** | |
1341 | * igbvf_configure_rx - Configure Receive Unit after Reset | |
1342 | * @adapter: board private structure | |
1343 | * | |
1344 | * Configure the Rx unit of the MAC after a reset. | |
1345 | **/ | |
1346 | static void igbvf_configure_rx(struct igbvf_adapter *adapter) | |
1347 | { | |
1348 | struct e1000_hw *hw = &adapter->hw; | |
1349 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
1350 | u64 rdba; | |
1351 | u32 rdlen, rxdctl; | |
1352 | ||
1353 | /* disable receives */ | |
1354 | rxdctl = er32(RXDCTL(0)); | |
1355 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
1356 | msleep(10); | |
1357 | ||
1358 | rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); | |
1359 | ||
1360 | /* | |
1361 | * Setup the HW Rx Head and Tail Descriptor Pointers and | |
1362 | * the Base and Length of the Rx Descriptor Ring | |
1363 | */ | |
1364 | rdba = rx_ring->dma; | |
1365 | ew32(RDBAL(0), (rdba & DMA_32BIT_MASK)); | |
1366 | ew32(RDBAH(0), (rdba >> 32)); | |
1367 | ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); | |
1368 | rx_ring->head = E1000_RDH(0); | |
1369 | rx_ring->tail = E1000_RDT(0); | |
1370 | ew32(RDH(0), 0); | |
1371 | ew32(RDT(0), 0); | |
1372 | ||
1373 | rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; | |
1374 | rxdctl &= 0xFFF00000; | |
1375 | rxdctl |= IGBVF_RX_PTHRESH; | |
1376 | rxdctl |= IGBVF_RX_HTHRESH << 8; | |
1377 | rxdctl |= IGBVF_RX_WTHRESH << 16; | |
1378 | ||
1379 | igbvf_set_rlpml(adapter); | |
1380 | ||
1381 | /* enable receives */ | |
1382 | ew32(RXDCTL(0), rxdctl); | |
1383 | } | |
1384 | ||
1385 | /** | |
1386 | * igbvf_set_multi - Multicast and Promiscuous mode set | |
1387 | * @netdev: network interface device structure | |
1388 | * | |
1389 | * The set_multi entry point is called whenever the multicast address | |
1390 | * list or the network interface flags are updated. This routine is | |
1391 | * responsible for configuring the hardware for proper multicast, | |
1392 | * promiscuous mode, and all-multi behavior. | |
1393 | **/ | |
1394 | static void igbvf_set_multi(struct net_device *netdev) | |
1395 | { | |
1396 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1397 | struct e1000_hw *hw = &adapter->hw; | |
1398 | struct dev_mc_list *mc_ptr; | |
1399 | u8 *mta_list = NULL; | |
1400 | int i; | |
1401 | ||
1402 | if (netdev->mc_count) { | |
1403 | mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC); | |
1404 | if (!mta_list) { | |
1405 | dev_err(&adapter->pdev->dev, | |
1406 | "failed to allocate multicast filter list\n"); | |
1407 | return; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | /* prepare a packed array of only addresses. */ | |
1412 | mc_ptr = netdev->mc_list; | |
1413 | ||
1414 | for (i = 0; i < netdev->mc_count; i++) { | |
1415 | if (!mc_ptr) | |
1416 | break; | |
1417 | memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, | |
1418 | ETH_ALEN); | |
1419 | mc_ptr = mc_ptr->next; | |
1420 | } | |
1421 | ||
1422 | hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); | |
1423 | kfree(mta_list); | |
1424 | } | |
1425 | ||
1426 | /** | |
1427 | * igbvf_configure - configure the hardware for Rx and Tx | |
1428 | * @adapter: private board structure | |
1429 | **/ | |
1430 | static void igbvf_configure(struct igbvf_adapter *adapter) | |
1431 | { | |
1432 | igbvf_set_multi(adapter->netdev); | |
1433 | ||
1434 | igbvf_restore_vlan(adapter); | |
1435 | ||
1436 | igbvf_configure_tx(adapter); | |
1437 | igbvf_setup_srrctl(adapter); | |
1438 | igbvf_configure_rx(adapter); | |
1439 | igbvf_alloc_rx_buffers(adapter->rx_ring, | |
1440 | igbvf_desc_unused(adapter->rx_ring)); | |
1441 | } | |
1442 | ||
1443 | /* igbvf_reset - bring the hardware into a known good state | |
1444 | * | |
1445 | * This function boots the hardware and enables some settings that | |
1446 | * require a configuration cycle of the hardware - those cannot be | |
1447 | * set/changed during runtime. After reset the device needs to be | |
1448 | * properly configured for Rx, Tx etc. | |
1449 | */ | |
1450 | void igbvf_reset(struct igbvf_adapter *adapter) | |
1451 | { | |
1452 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1453 | struct net_device *netdev = adapter->netdev; | |
1454 | struct e1000_hw *hw = &adapter->hw; | |
1455 | ||
1456 | /* Allow time for pending master requests to run */ | |
1457 | if (mac->ops.reset_hw(hw)) | |
1458 | dev_err(&adapter->pdev->dev, "PF still resetting\n"); | |
1459 | ||
1460 | mac->ops.init_hw(hw); | |
1461 | ||
1462 | if (is_valid_ether_addr(adapter->hw.mac.addr)) { | |
1463 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, | |
1464 | netdev->addr_len); | |
1465 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, | |
1466 | netdev->addr_len); | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | int igbvf_up(struct igbvf_adapter *adapter) | |
1471 | { | |
1472 | struct e1000_hw *hw = &adapter->hw; | |
1473 | ||
1474 | /* hardware has been reset, we need to reload some things */ | |
1475 | igbvf_configure(adapter); | |
1476 | ||
1477 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1478 | ||
1479 | napi_enable(&adapter->rx_ring->napi); | |
1480 | if (adapter->msix_entries) | |
1481 | igbvf_configure_msix(adapter); | |
1482 | ||
1483 | /* Clear any pending interrupts. */ | |
1484 | er32(EICR); | |
1485 | igbvf_irq_enable(adapter); | |
1486 | ||
1487 | /* start the watchdog */ | |
1488 | hw->mac.get_link_status = 1; | |
1489 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1490 | ||
1491 | ||
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | void igbvf_down(struct igbvf_adapter *adapter) | |
1496 | { | |
1497 | struct net_device *netdev = adapter->netdev; | |
1498 | struct e1000_hw *hw = &adapter->hw; | |
1499 | u32 rxdctl, txdctl; | |
1500 | ||
1501 | /* | |
1502 | * signal that we're down so the interrupt handler does not | |
1503 | * reschedule our watchdog timer | |
1504 | */ | |
1505 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1506 | ||
1507 | /* disable receives in the hardware */ | |
1508 | rxdctl = er32(RXDCTL(0)); | |
1509 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
1510 | ||
1511 | netif_stop_queue(netdev); | |
1512 | ||
1513 | /* disable transmits in the hardware */ | |
1514 | txdctl = er32(TXDCTL(0)); | |
1515 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
1516 | ||
1517 | /* flush both disables and wait for them to finish */ | |
1518 | e1e_flush(); | |
1519 | msleep(10); | |
1520 | ||
1521 | napi_disable(&adapter->rx_ring->napi); | |
1522 | ||
1523 | igbvf_irq_disable(adapter); | |
1524 | ||
1525 | del_timer_sync(&adapter->watchdog_timer); | |
1526 | ||
1527 | netdev->tx_queue_len = adapter->tx_queue_len; | |
1528 | netif_carrier_off(netdev); | |
1529 | ||
1530 | /* record the stats before reset*/ | |
1531 | igbvf_update_stats(adapter); | |
1532 | ||
1533 | adapter->link_speed = 0; | |
1534 | adapter->link_duplex = 0; | |
1535 | ||
1536 | igbvf_reset(adapter); | |
1537 | igbvf_clean_tx_ring(adapter->tx_ring); | |
1538 | igbvf_clean_rx_ring(adapter->rx_ring); | |
1539 | } | |
1540 | ||
1541 | void igbvf_reinit_locked(struct igbvf_adapter *adapter) | |
1542 | { | |
1543 | might_sleep(); | |
1544 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
1545 | msleep(1); | |
1546 | igbvf_down(adapter); | |
1547 | igbvf_up(adapter); | |
1548 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
1549 | } | |
1550 | ||
1551 | /** | |
1552 | * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) | |
1553 | * @adapter: board private structure to initialize | |
1554 | * | |
1555 | * igbvf_sw_init initializes the Adapter private data structure. | |
1556 | * Fields are initialized based on PCI device information and | |
1557 | * OS network device settings (MTU size). | |
1558 | **/ | |
1559 | static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter) | |
1560 | { | |
1561 | struct net_device *netdev = adapter->netdev; | |
1562 | s32 rc; | |
1563 | ||
1564 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; | |
1565 | adapter->rx_ps_hdr_size = 0; | |
1566 | adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; | |
1567 | adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; | |
1568 | ||
1569 | adapter->tx_int_delay = 8; | |
1570 | adapter->tx_abs_int_delay = 32; | |
1571 | adapter->rx_int_delay = 0; | |
1572 | adapter->rx_abs_int_delay = 8; | |
1573 | adapter->itr_setting = 3; | |
1574 | adapter->itr = 20000; | |
1575 | ||
1576 | /* Set various function pointers */ | |
1577 | adapter->ei->init_ops(&adapter->hw); | |
1578 | ||
1579 | rc = adapter->hw.mac.ops.init_params(&adapter->hw); | |
1580 | if (rc) | |
1581 | return rc; | |
1582 | ||
1583 | rc = adapter->hw.mbx.ops.init_params(&adapter->hw); | |
1584 | if (rc) | |
1585 | return rc; | |
1586 | ||
1587 | igbvf_set_interrupt_capability(adapter); | |
1588 | ||
1589 | if (igbvf_alloc_queues(adapter)) | |
1590 | return -ENOMEM; | |
1591 | ||
1592 | spin_lock_init(&adapter->tx_queue_lock); | |
1593 | ||
1594 | /* Explicitly disable IRQ since the NIC can be in any state. */ | |
1595 | igbvf_irq_disable(adapter); | |
1596 | ||
1597 | spin_lock_init(&adapter->stats_lock); | |
1598 | ||
1599 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) | |
1604 | { | |
1605 | struct e1000_hw *hw = &adapter->hw; | |
1606 | ||
1607 | adapter->stats.last_gprc = er32(VFGPRC); | |
1608 | adapter->stats.last_gorc = er32(VFGORC); | |
1609 | adapter->stats.last_gptc = er32(VFGPTC); | |
1610 | adapter->stats.last_gotc = er32(VFGOTC); | |
1611 | adapter->stats.last_mprc = er32(VFMPRC); | |
1612 | adapter->stats.last_gotlbc = er32(VFGOTLBC); | |
1613 | adapter->stats.last_gptlbc = er32(VFGPTLBC); | |
1614 | adapter->stats.last_gorlbc = er32(VFGORLBC); | |
1615 | adapter->stats.last_gprlbc = er32(VFGPRLBC); | |
1616 | ||
1617 | adapter->stats.base_gprc = er32(VFGPRC); | |
1618 | adapter->stats.base_gorc = er32(VFGORC); | |
1619 | adapter->stats.base_gptc = er32(VFGPTC); | |
1620 | adapter->stats.base_gotc = er32(VFGOTC); | |
1621 | adapter->stats.base_mprc = er32(VFMPRC); | |
1622 | adapter->stats.base_gotlbc = er32(VFGOTLBC); | |
1623 | adapter->stats.base_gptlbc = er32(VFGPTLBC); | |
1624 | adapter->stats.base_gorlbc = er32(VFGORLBC); | |
1625 | adapter->stats.base_gprlbc = er32(VFGPRLBC); | |
1626 | } | |
1627 | ||
1628 | /** | |
1629 | * igbvf_open - Called when a network interface is made active | |
1630 | * @netdev: network interface device structure | |
1631 | * | |
1632 | * Returns 0 on success, negative value on failure | |
1633 | * | |
1634 | * The open entry point is called when a network interface is made | |
1635 | * active by the system (IFF_UP). At this point all resources needed | |
1636 | * for transmit and receive operations are allocated, the interrupt | |
1637 | * handler is registered with the OS, the watchdog timer is started, | |
1638 | * and the stack is notified that the interface is ready. | |
1639 | **/ | |
1640 | static int igbvf_open(struct net_device *netdev) | |
1641 | { | |
1642 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1643 | struct e1000_hw *hw = &adapter->hw; | |
1644 | int err; | |
1645 | ||
1646 | /* disallow open during test */ | |
1647 | if (test_bit(__IGBVF_TESTING, &adapter->state)) | |
1648 | return -EBUSY; | |
1649 | ||
1650 | /* allocate transmit descriptors */ | |
1651 | err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); | |
1652 | if (err) | |
1653 | goto err_setup_tx; | |
1654 | ||
1655 | /* allocate receive descriptors */ | |
1656 | err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); | |
1657 | if (err) | |
1658 | goto err_setup_rx; | |
1659 | ||
1660 | /* | |
1661 | * before we allocate an interrupt, we must be ready to handle it. | |
1662 | * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt | |
1663 | * as soon as we call pci_request_irq, so we have to setup our | |
1664 | * clean_rx handler before we do so. | |
1665 | */ | |
1666 | igbvf_configure(adapter); | |
1667 | ||
1668 | err = igbvf_request_irq(adapter); | |
1669 | if (err) | |
1670 | goto err_req_irq; | |
1671 | ||
1672 | /* From here on the code is the same as igbvf_up() */ | |
1673 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1674 | ||
1675 | napi_enable(&adapter->rx_ring->napi); | |
1676 | ||
1677 | /* clear any pending interrupts */ | |
1678 | er32(EICR); | |
1679 | ||
1680 | igbvf_irq_enable(adapter); | |
1681 | ||
1682 | /* start the watchdog */ | |
1683 | hw->mac.get_link_status = 1; | |
1684 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1685 | ||
1686 | return 0; | |
1687 | ||
1688 | err_req_irq: | |
1689 | igbvf_free_rx_resources(adapter->rx_ring); | |
1690 | err_setup_rx: | |
1691 | igbvf_free_tx_resources(adapter->tx_ring); | |
1692 | err_setup_tx: | |
1693 | igbvf_reset(adapter); | |
1694 | ||
1695 | return err; | |
1696 | } | |
1697 | ||
1698 | /** | |
1699 | * igbvf_close - Disables a network interface | |
1700 | * @netdev: network interface device structure | |
1701 | * | |
1702 | * Returns 0, this is not allowed to fail | |
1703 | * | |
1704 | * The close entry point is called when an interface is de-activated | |
1705 | * by the OS. The hardware is still under the drivers control, but | |
1706 | * needs to be disabled. A global MAC reset is issued to stop the | |
1707 | * hardware, and all transmit and receive resources are freed. | |
1708 | **/ | |
1709 | static int igbvf_close(struct net_device *netdev) | |
1710 | { | |
1711 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1712 | ||
1713 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
1714 | igbvf_down(adapter); | |
1715 | ||
1716 | igbvf_free_irq(adapter); | |
1717 | ||
1718 | igbvf_free_tx_resources(adapter->tx_ring); | |
1719 | igbvf_free_rx_resources(adapter->rx_ring); | |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | /** | |
1724 | * igbvf_set_mac - Change the Ethernet Address of the NIC | |
1725 | * @netdev: network interface device structure | |
1726 | * @p: pointer to an address structure | |
1727 | * | |
1728 | * Returns 0 on success, negative on failure | |
1729 | **/ | |
1730 | static int igbvf_set_mac(struct net_device *netdev, void *p) | |
1731 | { | |
1732 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1733 | struct e1000_hw *hw = &adapter->hw; | |
1734 | struct sockaddr *addr = p; | |
1735 | ||
1736 | if (!is_valid_ether_addr(addr->sa_data)) | |
1737 | return -EADDRNOTAVAIL; | |
1738 | ||
1739 | memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); | |
1740 | ||
1741 | hw->mac.ops.rar_set(hw, hw->mac.addr, 0); | |
1742 | ||
1743 | if (memcmp(addr->sa_data, hw->mac.addr, 6)) | |
1744 | return -EADDRNOTAVAIL; | |
1745 | ||
1746 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1747 | ||
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | #define UPDATE_VF_COUNTER(reg, name) \ | |
1752 | { \ | |
1753 | u32 current_counter = er32(reg); \ | |
1754 | if (current_counter < adapter->stats.last_##name) \ | |
1755 | adapter->stats.name += 0x100000000LL; \ | |
1756 | adapter->stats.last_##name = current_counter; \ | |
1757 | adapter->stats.name &= 0xFFFFFFFF00000000LL; \ | |
1758 | adapter->stats.name |= current_counter; \ | |
1759 | } | |
1760 | ||
1761 | /** | |
1762 | * igbvf_update_stats - Update the board statistics counters | |
1763 | * @adapter: board private structure | |
1764 | **/ | |
1765 | void igbvf_update_stats(struct igbvf_adapter *adapter) | |
1766 | { | |
1767 | struct e1000_hw *hw = &adapter->hw; | |
1768 | struct pci_dev *pdev = adapter->pdev; | |
1769 | ||
1770 | /* | |
1771 | * Prevent stats update while adapter is being reset, link is down | |
1772 | * or if the pci connection is down. | |
1773 | */ | |
1774 | if (adapter->link_speed == 0) | |
1775 | return; | |
1776 | ||
1777 | if (test_bit(__IGBVF_RESETTING, &adapter->state)) | |
1778 | return; | |
1779 | ||
1780 | if (pci_channel_offline(pdev)) | |
1781 | return; | |
1782 | ||
1783 | UPDATE_VF_COUNTER(VFGPRC, gprc); | |
1784 | UPDATE_VF_COUNTER(VFGORC, gorc); | |
1785 | UPDATE_VF_COUNTER(VFGPTC, gptc); | |
1786 | UPDATE_VF_COUNTER(VFGOTC, gotc); | |
1787 | UPDATE_VF_COUNTER(VFMPRC, mprc); | |
1788 | UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); | |
1789 | UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); | |
1790 | UPDATE_VF_COUNTER(VFGORLBC, gorlbc); | |
1791 | UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); | |
1792 | ||
1793 | /* Fill out the OS statistics structure */ | |
1794 | adapter->net_stats.multicast = adapter->stats.mprc; | |
1795 | } | |
1796 | ||
1797 | static void igbvf_print_link_info(struct igbvf_adapter *adapter) | |
1798 | { | |
1799 | dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n", | |
1800 | adapter->link_speed, | |
1801 | ((adapter->link_duplex == FULL_DUPLEX) ? | |
1802 | "Full Duplex" : "Half Duplex")); | |
1803 | } | |
1804 | ||
1805 | static bool igbvf_has_link(struct igbvf_adapter *adapter) | |
1806 | { | |
1807 | struct e1000_hw *hw = &adapter->hw; | |
1808 | s32 ret_val = E1000_SUCCESS; | |
1809 | bool link_active; | |
1810 | ||
1811 | ret_val = hw->mac.ops.check_for_link(hw); | |
1812 | link_active = !hw->mac.get_link_status; | |
1813 | ||
1814 | /* if check for link returns error we will need to reset */ | |
1815 | if (ret_val) | |
1816 | schedule_work(&adapter->reset_task); | |
1817 | ||
1818 | return link_active; | |
1819 | } | |
1820 | ||
1821 | /** | |
1822 | * igbvf_watchdog - Timer Call-back | |
1823 | * @data: pointer to adapter cast into an unsigned long | |
1824 | **/ | |
1825 | static void igbvf_watchdog(unsigned long data) | |
1826 | { | |
1827 | struct igbvf_adapter *adapter = (struct igbvf_adapter *) data; | |
1828 | ||
1829 | /* Do the rest outside of interrupt context */ | |
1830 | schedule_work(&adapter->watchdog_task); | |
1831 | } | |
1832 | ||
1833 | static void igbvf_watchdog_task(struct work_struct *work) | |
1834 | { | |
1835 | struct igbvf_adapter *adapter = container_of(work, | |
1836 | struct igbvf_adapter, | |
1837 | watchdog_task); | |
1838 | struct net_device *netdev = adapter->netdev; | |
1839 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1840 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1841 | struct e1000_hw *hw = &adapter->hw; | |
1842 | u32 link; | |
1843 | int tx_pending = 0; | |
1844 | ||
1845 | link = igbvf_has_link(adapter); | |
1846 | ||
1847 | if (link) { | |
1848 | if (!netif_carrier_ok(netdev)) { | |
1849 | bool txb2b = 1; | |
1850 | ||
1851 | mac->ops.get_link_up_info(&adapter->hw, | |
1852 | &adapter->link_speed, | |
1853 | &adapter->link_duplex); | |
1854 | igbvf_print_link_info(adapter); | |
1855 | ||
1856 | /* | |
1857 | * tweak tx_queue_len according to speed/duplex | |
1858 | * and adjust the timeout factor | |
1859 | */ | |
1860 | netdev->tx_queue_len = adapter->tx_queue_len; | |
1861 | adapter->tx_timeout_factor = 1; | |
1862 | switch (adapter->link_speed) { | |
1863 | case SPEED_10: | |
1864 | txb2b = 0; | |
1865 | netdev->tx_queue_len = 10; | |
1866 | adapter->tx_timeout_factor = 16; | |
1867 | break; | |
1868 | case SPEED_100: | |
1869 | txb2b = 0; | |
1870 | netdev->tx_queue_len = 100; | |
1871 | /* maybe add some timeout factor ? */ | |
1872 | break; | |
1873 | } | |
1874 | ||
1875 | netif_carrier_on(netdev); | |
1876 | netif_wake_queue(netdev); | |
1877 | } | |
1878 | } else { | |
1879 | if (netif_carrier_ok(netdev)) { | |
1880 | adapter->link_speed = 0; | |
1881 | adapter->link_duplex = 0; | |
1882 | dev_info(&adapter->pdev->dev, "Link is Down\n"); | |
1883 | netif_carrier_off(netdev); | |
1884 | netif_stop_queue(netdev); | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | if (netif_carrier_ok(netdev)) { | |
1889 | igbvf_update_stats(adapter); | |
1890 | } else { | |
1891 | tx_pending = (igbvf_desc_unused(tx_ring) + 1 < | |
1892 | tx_ring->count); | |
1893 | if (tx_pending) { | |
1894 | /* | |
1895 | * We've lost link, so the controller stops DMA, | |
1896 | * but we've got queued Tx work that's never going | |
1897 | * to get done, so reset controller to flush Tx. | |
1898 | * (Do the reset outside of interrupt context). | |
1899 | */ | |
1900 | adapter->tx_timeout_count++; | |
1901 | schedule_work(&adapter->reset_task); | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | /* Cause software interrupt to ensure Rx ring is cleaned */ | |
1906 | ew32(EICS, adapter->rx_ring->eims_value); | |
1907 | ||
1908 | /* Force detection of hung controller every watchdog period */ | |
1909 | adapter->detect_tx_hung = 1; | |
1910 | ||
1911 | /* Reset the timer */ | |
1912 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1913 | mod_timer(&adapter->watchdog_timer, | |
1914 | round_jiffies(jiffies + (2 * HZ))); | |
1915 | } | |
1916 | ||
1917 | #define IGBVF_TX_FLAGS_CSUM 0x00000001 | |
1918 | #define IGBVF_TX_FLAGS_VLAN 0x00000002 | |
1919 | #define IGBVF_TX_FLAGS_TSO 0x00000004 | |
1920 | #define IGBVF_TX_FLAGS_IPV4 0x00000008 | |
1921 | #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 | |
1922 | #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 | |
1923 | ||
1924 | static int igbvf_tso(struct igbvf_adapter *adapter, | |
1925 | struct igbvf_ring *tx_ring, | |
1926 | struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) | |
1927 | { | |
1928 | struct e1000_adv_tx_context_desc *context_desc; | |
1929 | unsigned int i; | |
1930 | int err; | |
1931 | struct igbvf_buffer *buffer_info; | |
1932 | u32 info = 0, tu_cmd = 0; | |
1933 | u32 mss_l4len_idx, l4len; | |
1934 | *hdr_len = 0; | |
1935 | ||
1936 | if (skb_header_cloned(skb)) { | |
1937 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1938 | if (err) { | |
1939 | dev_err(&adapter->pdev->dev, | |
1940 | "igbvf_tso returning an error\n"); | |
1941 | return err; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | l4len = tcp_hdrlen(skb); | |
1946 | *hdr_len += l4len; | |
1947 | ||
1948 | if (skb->protocol == htons(ETH_P_IP)) { | |
1949 | struct iphdr *iph = ip_hdr(skb); | |
1950 | iph->tot_len = 0; | |
1951 | iph->check = 0; | |
1952 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, | |
1953 | iph->daddr, 0, | |
1954 | IPPROTO_TCP, | |
1955 | 0); | |
1956 | } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) { | |
1957 | ipv6_hdr(skb)->payload_len = 0; | |
1958 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
1959 | &ipv6_hdr(skb)->daddr, | |
1960 | 0, IPPROTO_TCP, 0); | |
1961 | } | |
1962 | ||
1963 | i = tx_ring->next_to_use; | |
1964 | ||
1965 | buffer_info = &tx_ring->buffer_info[i]; | |
1966 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
1967 | /* VLAN MACLEN IPLEN */ | |
1968 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
1969 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
1970 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
1971 | *hdr_len += skb_network_offset(skb); | |
1972 | info |= (skb_transport_header(skb) - skb_network_header(skb)); | |
1973 | *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); | |
1974 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
1975 | ||
1976 | /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ | |
1977 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
1978 | ||
1979 | if (skb->protocol == htons(ETH_P_IP)) | |
1980 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
1981 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
1982 | ||
1983 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
1984 | ||
1985 | /* MSS L4LEN IDX */ | |
1986 | mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); | |
1987 | mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); | |
1988 | ||
1989 | context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); | |
1990 | context_desc->seqnum_seed = 0; | |
1991 | ||
1992 | buffer_info->time_stamp = jiffies; | |
1993 | buffer_info->next_to_watch = i; | |
1994 | buffer_info->dma = 0; | |
1995 | i++; | |
1996 | if (i == tx_ring->count) | |
1997 | i = 0; | |
1998 | ||
1999 | tx_ring->next_to_use = i; | |
2000 | ||
2001 | return true; | |
2002 | } | |
2003 | ||
2004 | static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, | |
2005 | struct igbvf_ring *tx_ring, | |
2006 | struct sk_buff *skb, u32 tx_flags) | |
2007 | { | |
2008 | struct e1000_adv_tx_context_desc *context_desc; | |
2009 | unsigned int i; | |
2010 | struct igbvf_buffer *buffer_info; | |
2011 | u32 info = 0, tu_cmd = 0; | |
2012 | ||
2013 | if ((skb->ip_summed == CHECKSUM_PARTIAL) || | |
2014 | (tx_flags & IGBVF_TX_FLAGS_VLAN)) { | |
2015 | i = tx_ring->next_to_use; | |
2016 | buffer_info = &tx_ring->buffer_info[i]; | |
2017 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
2018 | ||
2019 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
2020 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
2021 | ||
2022 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
2023 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
2024 | info |= (skb_transport_header(skb) - | |
2025 | skb_network_header(skb)); | |
2026 | ||
2027 | ||
2028 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
2029 | ||
2030 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
2031 | ||
2032 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
2033 | switch (skb->protocol) { | |
2034 | case __constant_htons(ETH_P_IP): | |
2035 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
2036 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
2037 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
2038 | break; | |
2039 | case __constant_htons(ETH_P_IPV6): | |
2040 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
2041 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
2042 | break; | |
2043 | default: | |
2044 | break; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
2049 | context_desc->seqnum_seed = 0; | |
2050 | context_desc->mss_l4len_idx = 0; | |
2051 | ||
2052 | buffer_info->time_stamp = jiffies; | |
2053 | buffer_info->next_to_watch = i; | |
2054 | buffer_info->dma = 0; | |
2055 | i++; | |
2056 | if (i == tx_ring->count) | |
2057 | i = 0; | |
2058 | tx_ring->next_to_use = i; | |
2059 | ||
2060 | return true; | |
2061 | } | |
2062 | ||
2063 | return false; | |
2064 | } | |
2065 | ||
2066 | static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) | |
2067 | { | |
2068 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2069 | ||
2070 | /* there is enough descriptors then we don't need to worry */ | |
2071 | if (igbvf_desc_unused(adapter->tx_ring) >= size) | |
2072 | return 0; | |
2073 | ||
2074 | netif_stop_queue(netdev); | |
2075 | ||
2076 | smp_mb(); | |
2077 | ||
2078 | /* We need to check again just in case room has been made available */ | |
2079 | if (igbvf_desc_unused(adapter->tx_ring) < size) | |
2080 | return -EBUSY; | |
2081 | ||
2082 | netif_wake_queue(netdev); | |
2083 | ||
2084 | ++adapter->restart_queue; | |
2085 | return 0; | |
2086 | } | |
2087 | ||
2088 | #define IGBVF_MAX_TXD_PWR 16 | |
2089 | #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) | |
2090 | ||
2091 | static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, | |
2092 | struct igbvf_ring *tx_ring, | |
2093 | struct sk_buff *skb, | |
2094 | unsigned int first) | |
2095 | { | |
2096 | struct igbvf_buffer *buffer_info; | |
2097 | unsigned int len = skb_headlen(skb); | |
2098 | unsigned int count = 0, i; | |
2099 | unsigned int f; | |
2100 | dma_addr_t *map; | |
2101 | ||
2102 | i = tx_ring->next_to_use; | |
2103 | ||
2104 | if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) { | |
2105 | dev_err(&adapter->pdev->dev, "TX DMA map failed\n"); | |
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | map = skb_shinfo(skb)->dma_maps; | |
2110 | ||
2111 | buffer_info = &tx_ring->buffer_info[i]; | |
2112 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2113 | buffer_info->length = len; | |
2114 | /* set time_stamp *before* dma to help avoid a possible race */ | |
2115 | buffer_info->time_stamp = jiffies; | |
2116 | buffer_info->next_to_watch = i; | |
2117 | buffer_info->dma = map[count]; | |
2118 | count++; | |
2119 | ||
2120 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { | |
2121 | struct skb_frag_struct *frag; | |
2122 | ||
2123 | i++; | |
2124 | if (i == tx_ring->count) | |
2125 | i = 0; | |
2126 | ||
2127 | frag = &skb_shinfo(skb)->frags[f]; | |
2128 | len = frag->size; | |
2129 | ||
2130 | buffer_info = &tx_ring->buffer_info[i]; | |
2131 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2132 | buffer_info->length = len; | |
2133 | buffer_info->time_stamp = jiffies; | |
2134 | buffer_info->next_to_watch = i; | |
2135 | buffer_info->dma = map[count]; | |
2136 | count++; | |
2137 | } | |
2138 | ||
2139 | tx_ring->buffer_info[i].skb = skb; | |
2140 | tx_ring->buffer_info[first].next_to_watch = i; | |
2141 | ||
2142 | return count; | |
2143 | } | |
2144 | ||
2145 | static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, | |
2146 | struct igbvf_ring *tx_ring, | |
2147 | int tx_flags, int count, u32 paylen, | |
2148 | u8 hdr_len) | |
2149 | { | |
2150 | union e1000_adv_tx_desc *tx_desc = NULL; | |
2151 | struct igbvf_buffer *buffer_info; | |
2152 | u32 olinfo_status = 0, cmd_type_len; | |
2153 | unsigned int i; | |
2154 | ||
2155 | cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | | |
2156 | E1000_ADVTXD_DCMD_DEXT); | |
2157 | ||
2158 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
2159 | cmd_type_len |= E1000_ADVTXD_DCMD_VLE; | |
2160 | ||
2161 | if (tx_flags & IGBVF_TX_FLAGS_TSO) { | |
2162 | cmd_type_len |= E1000_ADVTXD_DCMD_TSE; | |
2163 | ||
2164 | /* insert tcp checksum */ | |
2165 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2166 | ||
2167 | /* insert ip checksum */ | |
2168 | if (tx_flags & IGBVF_TX_FLAGS_IPV4) | |
2169 | olinfo_status |= E1000_TXD_POPTS_IXSM << 8; | |
2170 | ||
2171 | } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { | |
2172 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2173 | } | |
2174 | ||
2175 | olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); | |
2176 | ||
2177 | i = tx_ring->next_to_use; | |
2178 | while (count--) { | |
2179 | buffer_info = &tx_ring->buffer_info[i]; | |
2180 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
2181 | tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); | |
2182 | tx_desc->read.cmd_type_len = | |
2183 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
2184 | tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); | |
2185 | i++; | |
2186 | if (i == tx_ring->count) | |
2187 | i = 0; | |
2188 | } | |
2189 | ||
2190 | tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); | |
2191 | /* Force memory writes to complete before letting h/w | |
2192 | * know there are new descriptors to fetch. (Only | |
2193 | * applicable for weak-ordered memory model archs, | |
2194 | * such as IA-64). */ | |
2195 | wmb(); | |
2196 | ||
2197 | tx_ring->next_to_use = i; | |
2198 | writel(i, adapter->hw.hw_addr + tx_ring->tail); | |
2199 | /* we need this if more than one processor can write to our tail | |
2200 | * at a time, it syncronizes IO on IA64/Altix systems */ | |
2201 | mmiowb(); | |
2202 | } | |
2203 | ||
2204 | static int igbvf_xmit_frame_ring_adv(struct sk_buff *skb, | |
2205 | struct net_device *netdev, | |
2206 | struct igbvf_ring *tx_ring) | |
2207 | { | |
2208 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2209 | unsigned int first, tx_flags = 0; | |
2210 | u8 hdr_len = 0; | |
2211 | int count = 0; | |
2212 | int tso = 0; | |
2213 | ||
2214 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2215 | dev_kfree_skb_any(skb); | |
2216 | return NETDEV_TX_OK; | |
2217 | } | |
2218 | ||
2219 | if (skb->len <= 0) { | |
2220 | dev_kfree_skb_any(skb); | |
2221 | return NETDEV_TX_OK; | |
2222 | } | |
2223 | ||
2224 | /* | |
2225 | * need: count + 4 desc gap to keep tail from touching | |
2226 | * + 2 desc gap to keep tail from touching head, | |
2227 | * + 1 desc for skb->data, | |
2228 | * + 1 desc for context descriptor, | |
2229 | * head, otherwise try next time | |
2230 | */ | |
2231 | if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { | |
2232 | /* this is a hard error */ | |
2233 | return NETDEV_TX_BUSY; | |
2234 | } | |
2235 | ||
2236 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { | |
2237 | tx_flags |= IGBVF_TX_FLAGS_VLAN; | |
2238 | tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); | |
2239 | } | |
2240 | ||
2241 | if (skb->protocol == htons(ETH_P_IP)) | |
2242 | tx_flags |= IGBVF_TX_FLAGS_IPV4; | |
2243 | ||
2244 | first = tx_ring->next_to_use; | |
2245 | ||
2246 | tso = skb_is_gso(skb) ? | |
2247 | igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; | |
2248 | if (unlikely(tso < 0)) { | |
2249 | dev_kfree_skb_any(skb); | |
2250 | return NETDEV_TX_OK; | |
2251 | } | |
2252 | ||
2253 | if (tso) | |
2254 | tx_flags |= IGBVF_TX_FLAGS_TSO; | |
2255 | else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && | |
2256 | (skb->ip_summed == CHECKSUM_PARTIAL)) | |
2257 | tx_flags |= IGBVF_TX_FLAGS_CSUM; | |
2258 | ||
2259 | /* | |
2260 | * count reflects descriptors mapped, if 0 then mapping error | |
2261 | * has occured and we need to rewind the descriptor queue | |
2262 | */ | |
2263 | count = igbvf_tx_map_adv(adapter, tx_ring, skb, first); | |
2264 | ||
2265 | if (count) { | |
2266 | igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, | |
2267 | skb->len, hdr_len); | |
2268 | netdev->trans_start = jiffies; | |
2269 | /* Make sure there is space in the ring for the next send. */ | |
2270 | igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); | |
2271 | } else { | |
2272 | dev_kfree_skb_any(skb); | |
2273 | tx_ring->buffer_info[first].time_stamp = 0; | |
2274 | tx_ring->next_to_use = first; | |
2275 | } | |
2276 | ||
2277 | return NETDEV_TX_OK; | |
2278 | } | |
2279 | ||
2280 | static int igbvf_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |
2281 | { | |
2282 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2283 | struct igbvf_ring *tx_ring; | |
2284 | int retval; | |
2285 | ||
2286 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2287 | dev_kfree_skb_any(skb); | |
2288 | return NETDEV_TX_OK; | |
2289 | } | |
2290 | ||
2291 | tx_ring = &adapter->tx_ring[0]; | |
2292 | ||
2293 | retval = igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); | |
2294 | ||
2295 | return retval; | |
2296 | } | |
2297 | ||
2298 | /** | |
2299 | * igbvf_tx_timeout - Respond to a Tx Hang | |
2300 | * @netdev: network interface device structure | |
2301 | **/ | |
2302 | static void igbvf_tx_timeout(struct net_device *netdev) | |
2303 | { | |
2304 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2305 | ||
2306 | /* Do the reset outside of interrupt context */ | |
2307 | adapter->tx_timeout_count++; | |
2308 | schedule_work(&adapter->reset_task); | |
2309 | } | |
2310 | ||
2311 | static void igbvf_reset_task(struct work_struct *work) | |
2312 | { | |
2313 | struct igbvf_adapter *adapter; | |
2314 | adapter = container_of(work, struct igbvf_adapter, reset_task); | |
2315 | ||
2316 | igbvf_reinit_locked(adapter); | |
2317 | } | |
2318 | ||
2319 | /** | |
2320 | * igbvf_get_stats - Get System Network Statistics | |
2321 | * @netdev: network interface device structure | |
2322 | * | |
2323 | * Returns the address of the device statistics structure. | |
2324 | * The statistics are actually updated from the timer callback. | |
2325 | **/ | |
2326 | static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) | |
2327 | { | |
2328 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2329 | ||
2330 | /* only return the current stats */ | |
2331 | return &adapter->net_stats; | |
2332 | } | |
2333 | ||
2334 | /** | |
2335 | * igbvf_change_mtu - Change the Maximum Transfer Unit | |
2336 | * @netdev: network interface device structure | |
2337 | * @new_mtu: new value for maximum frame size | |
2338 | * | |
2339 | * Returns 0 on success, negative on failure | |
2340 | **/ | |
2341 | static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) | |
2342 | { | |
2343 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2344 | int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; | |
2345 | ||
2346 | if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { | |
2347 | dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); | |
2348 | return -EINVAL; | |
2349 | } | |
2350 | ||
2351 | /* Jumbo frame size limits */ | |
2352 | if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) { | |
2353 | if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) { | |
2354 | dev_err(&adapter->pdev->dev, | |
2355 | "Jumbo Frames not supported.\n"); | |
2356 | return -EINVAL; | |
2357 | } | |
2358 | } | |
2359 | ||
2360 | #define MAX_STD_JUMBO_FRAME_SIZE 9234 | |
2361 | if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { | |
2362 | dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); | |
2363 | return -EINVAL; | |
2364 | } | |
2365 | ||
2366 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
2367 | msleep(1); | |
2368 | /* igbvf_down has a dependency on max_frame_size */ | |
2369 | adapter->max_frame_size = max_frame; | |
2370 | if (netif_running(netdev)) | |
2371 | igbvf_down(adapter); | |
2372 | ||
2373 | /* | |
2374 | * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN | |
2375 | * means we reserve 2 more, this pushes us to allocate from the next | |
2376 | * larger slab size. | |
2377 | * i.e. RXBUFFER_2048 --> size-4096 slab | |
2378 | * However with the new *_jumbo_rx* routines, jumbo receives will use | |
2379 | * fragmented skbs | |
2380 | */ | |
2381 | ||
2382 | if (max_frame <= 1024) | |
2383 | adapter->rx_buffer_len = 1024; | |
2384 | else if (max_frame <= 2048) | |
2385 | adapter->rx_buffer_len = 2048; | |
2386 | else | |
2387 | #if (PAGE_SIZE / 2) > 16384 | |
2388 | adapter->rx_buffer_len = 16384; | |
2389 | #else | |
2390 | adapter->rx_buffer_len = PAGE_SIZE / 2; | |
2391 | #endif | |
2392 | ||
2393 | ||
2394 | /* adjust allocation if LPE protects us, and we aren't using SBP */ | |
2395 | if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || | |
2396 | (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) | |
2397 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + | |
2398 | ETH_FCS_LEN; | |
2399 | ||
2400 | dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", | |
2401 | netdev->mtu, new_mtu); | |
2402 | netdev->mtu = new_mtu; | |
2403 | ||
2404 | if (netif_running(netdev)) | |
2405 | igbvf_up(adapter); | |
2406 | else | |
2407 | igbvf_reset(adapter); | |
2408 | ||
2409 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
2415 | { | |
2416 | switch (cmd) { | |
2417 | default: | |
2418 | return -EOPNOTSUPP; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) | |
2423 | { | |
2424 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2425 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2426 | #ifdef CONFIG_PM | |
2427 | int retval = 0; | |
2428 | #endif | |
2429 | ||
2430 | netif_device_detach(netdev); | |
2431 | ||
2432 | if (netif_running(netdev)) { | |
2433 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
2434 | igbvf_down(adapter); | |
2435 | igbvf_free_irq(adapter); | |
2436 | } | |
2437 | ||
2438 | #ifdef CONFIG_PM | |
2439 | retval = pci_save_state(pdev); | |
2440 | if (retval) | |
2441 | return retval; | |
2442 | #endif | |
2443 | ||
2444 | pci_disable_device(pdev); | |
2445 | ||
2446 | return 0; | |
2447 | } | |
2448 | ||
2449 | #ifdef CONFIG_PM | |
2450 | static int igbvf_resume(struct pci_dev *pdev) | |
2451 | { | |
2452 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2453 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2454 | u32 err; | |
2455 | ||
2456 | pci_restore_state(pdev); | |
2457 | err = pci_enable_device_mem(pdev); | |
2458 | if (err) { | |
2459 | dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); | |
2460 | return err; | |
2461 | } | |
2462 | ||
2463 | pci_set_master(pdev); | |
2464 | ||
2465 | if (netif_running(netdev)) { | |
2466 | err = igbvf_request_irq(adapter); | |
2467 | if (err) | |
2468 | return err; | |
2469 | } | |
2470 | ||
2471 | igbvf_reset(adapter); | |
2472 | ||
2473 | if (netif_running(netdev)) | |
2474 | igbvf_up(adapter); | |
2475 | ||
2476 | netif_device_attach(netdev); | |
2477 | ||
2478 | return 0; | |
2479 | } | |
2480 | #endif | |
2481 | ||
2482 | static void igbvf_shutdown(struct pci_dev *pdev) | |
2483 | { | |
2484 | igbvf_suspend(pdev, PMSG_SUSPEND); | |
2485 | } | |
2486 | ||
2487 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2488 | /* | |
2489 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2490 | * without having to re-enable interrupts. It's not called while | |
2491 | * the interrupt routine is executing. | |
2492 | */ | |
2493 | static void igbvf_netpoll(struct net_device *netdev) | |
2494 | { | |
2495 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2496 | ||
2497 | disable_irq(adapter->pdev->irq); | |
2498 | ||
2499 | igbvf_clean_tx_irq(adapter->tx_ring); | |
2500 | ||
2501 | enable_irq(adapter->pdev->irq); | |
2502 | } | |
2503 | #endif | |
2504 | ||
2505 | /** | |
2506 | * igbvf_io_error_detected - called when PCI error is detected | |
2507 | * @pdev: Pointer to PCI device | |
2508 | * @state: The current pci connection state | |
2509 | * | |
2510 | * This function is called after a PCI bus error affecting | |
2511 | * this device has been detected. | |
2512 | */ | |
2513 | static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, | |
2514 | pci_channel_state_t state) | |
2515 | { | |
2516 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2517 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2518 | ||
2519 | netif_device_detach(netdev); | |
2520 | ||
2521 | if (netif_running(netdev)) | |
2522 | igbvf_down(adapter); | |
2523 | pci_disable_device(pdev); | |
2524 | ||
2525 | /* Request a slot slot reset. */ | |
2526 | return PCI_ERS_RESULT_NEED_RESET; | |
2527 | } | |
2528 | ||
2529 | /** | |
2530 | * igbvf_io_slot_reset - called after the pci bus has been reset. | |
2531 | * @pdev: Pointer to PCI device | |
2532 | * | |
2533 | * Restart the card from scratch, as if from a cold-boot. Implementation | |
2534 | * resembles the first-half of the igbvf_resume routine. | |
2535 | */ | |
2536 | static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) | |
2537 | { | |
2538 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2539 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2540 | ||
2541 | if (pci_enable_device_mem(pdev)) { | |
2542 | dev_err(&pdev->dev, | |
2543 | "Cannot re-enable PCI device after reset.\n"); | |
2544 | return PCI_ERS_RESULT_DISCONNECT; | |
2545 | } | |
2546 | pci_set_master(pdev); | |
2547 | ||
2548 | igbvf_reset(adapter); | |
2549 | ||
2550 | return PCI_ERS_RESULT_RECOVERED; | |
2551 | } | |
2552 | ||
2553 | /** | |
2554 | * igbvf_io_resume - called when traffic can start flowing again. | |
2555 | * @pdev: Pointer to PCI device | |
2556 | * | |
2557 | * This callback is called when the error recovery driver tells us that | |
2558 | * its OK to resume normal operation. Implementation resembles the | |
2559 | * second-half of the igbvf_resume routine. | |
2560 | */ | |
2561 | static void igbvf_io_resume(struct pci_dev *pdev) | |
2562 | { | |
2563 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2564 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2565 | ||
2566 | if (netif_running(netdev)) { | |
2567 | if (igbvf_up(adapter)) { | |
2568 | dev_err(&pdev->dev, | |
2569 | "can't bring device back up after reset\n"); | |
2570 | return; | |
2571 | } | |
2572 | } | |
2573 | ||
2574 | netif_device_attach(netdev); | |
2575 | } | |
2576 | ||
2577 | static void igbvf_print_device_info(struct igbvf_adapter *adapter) | |
2578 | { | |
2579 | struct e1000_hw *hw = &adapter->hw; | |
2580 | struct net_device *netdev = adapter->netdev; | |
2581 | struct pci_dev *pdev = adapter->pdev; | |
2582 | ||
2583 | dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); | |
2584 | dev_info(&pdev->dev, "Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
2585 | /* MAC address */ | |
2586 | netdev->dev_addr[0], netdev->dev_addr[1], | |
2587 | netdev->dev_addr[2], netdev->dev_addr[3], | |
2588 | netdev->dev_addr[4], netdev->dev_addr[5]); | |
2589 | dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type); | |
2590 | } | |
2591 | ||
2592 | static const struct net_device_ops igbvf_netdev_ops = { | |
2593 | .ndo_open = igbvf_open, | |
2594 | .ndo_stop = igbvf_close, | |
2595 | .ndo_start_xmit = igbvf_xmit_frame, | |
2596 | .ndo_get_stats = igbvf_get_stats, | |
2597 | .ndo_set_multicast_list = igbvf_set_multi, | |
2598 | .ndo_set_mac_address = igbvf_set_mac, | |
2599 | .ndo_change_mtu = igbvf_change_mtu, | |
2600 | .ndo_do_ioctl = igbvf_ioctl, | |
2601 | .ndo_tx_timeout = igbvf_tx_timeout, | |
2602 | .ndo_vlan_rx_register = igbvf_vlan_rx_register, | |
2603 | .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, | |
2604 | .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, | |
2605 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2606 | .ndo_poll_controller = igbvf_netpoll, | |
2607 | #endif | |
2608 | }; | |
2609 | ||
2610 | /** | |
2611 | * igbvf_probe - Device Initialization Routine | |
2612 | * @pdev: PCI device information struct | |
2613 | * @ent: entry in igbvf_pci_tbl | |
2614 | * | |
2615 | * Returns 0 on success, negative on failure | |
2616 | * | |
2617 | * igbvf_probe initializes an adapter identified by a pci_dev structure. | |
2618 | * The OS initialization, configuring of the adapter private structure, | |
2619 | * and a hardware reset occur. | |
2620 | **/ | |
2621 | static int __devinit igbvf_probe(struct pci_dev *pdev, | |
2622 | const struct pci_device_id *ent) | |
2623 | { | |
2624 | struct net_device *netdev; | |
2625 | struct igbvf_adapter *adapter; | |
2626 | struct e1000_hw *hw; | |
2627 | const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; | |
2628 | ||
2629 | static int cards_found; | |
2630 | int err, pci_using_dac; | |
2631 | ||
2632 | err = pci_enable_device_mem(pdev); | |
2633 | if (err) | |
2634 | return err; | |
2635 | ||
2636 | pci_using_dac = 0; | |
2637 | err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); | |
2638 | if (!err) { | |
2639 | err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); | |
2640 | if (!err) | |
2641 | pci_using_dac = 1; | |
2642 | } else { | |
2643 | err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
2644 | if (err) { | |
2645 | err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
2646 | if (err) { | |
2647 | dev_err(&pdev->dev, "No usable DMA " | |
2648 | "configuration, aborting\n"); | |
2649 | goto err_dma; | |
2650 | } | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | err = pci_request_regions(pdev, igbvf_driver_name); | |
2655 | if (err) | |
2656 | goto err_pci_reg; | |
2657 | ||
2658 | pci_set_master(pdev); | |
2659 | ||
2660 | err = -ENOMEM; | |
2661 | netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); | |
2662 | if (!netdev) | |
2663 | goto err_alloc_etherdev; | |
2664 | ||
2665 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2666 | ||
2667 | pci_set_drvdata(pdev, netdev); | |
2668 | adapter = netdev_priv(netdev); | |
2669 | hw = &adapter->hw; | |
2670 | adapter->netdev = netdev; | |
2671 | adapter->pdev = pdev; | |
2672 | adapter->ei = ei; | |
2673 | adapter->pba = ei->pba; | |
2674 | adapter->flags = ei->flags; | |
2675 | adapter->hw.back = adapter; | |
2676 | adapter->hw.mac.type = ei->mac; | |
2677 | adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1; | |
2678 | ||
2679 | /* PCI config space info */ | |
2680 | ||
2681 | hw->vendor_id = pdev->vendor; | |
2682 | hw->device_id = pdev->device; | |
2683 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
2684 | hw->subsystem_device_id = pdev->subsystem_device; | |
2685 | ||
2686 | pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); | |
2687 | ||
2688 | err = -EIO; | |
2689 | adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), | |
2690 | pci_resource_len(pdev, 0)); | |
2691 | ||
2692 | if (!adapter->hw.hw_addr) | |
2693 | goto err_ioremap; | |
2694 | ||
2695 | if (ei->get_variants) { | |
2696 | err = ei->get_variants(adapter); | |
2697 | if (err) | |
2698 | goto err_ioremap; | |
2699 | } | |
2700 | ||
2701 | /* setup adapter struct */ | |
2702 | err = igbvf_sw_init(adapter); | |
2703 | if (err) | |
2704 | goto err_sw_init; | |
2705 | ||
2706 | /* construct the net_device struct */ | |
2707 | netdev->netdev_ops = &igbvf_netdev_ops; | |
2708 | ||
2709 | igbvf_set_ethtool_ops(netdev); | |
2710 | netdev->watchdog_timeo = 5 * HZ; | |
2711 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); | |
2712 | ||
2713 | adapter->bd_number = cards_found++; | |
2714 | ||
2715 | netdev->features = NETIF_F_SG | | |
2716 | NETIF_F_IP_CSUM | | |
2717 | NETIF_F_HW_VLAN_TX | | |
2718 | NETIF_F_HW_VLAN_RX | | |
2719 | NETIF_F_HW_VLAN_FILTER; | |
2720 | ||
2721 | netdev->features |= NETIF_F_IPV6_CSUM; | |
2722 | netdev->features |= NETIF_F_TSO; | |
2723 | netdev->features |= NETIF_F_TSO6; | |
2724 | ||
2725 | if (pci_using_dac) | |
2726 | netdev->features |= NETIF_F_HIGHDMA; | |
2727 | ||
2728 | netdev->vlan_features |= NETIF_F_TSO; | |
2729 | netdev->vlan_features |= NETIF_F_TSO6; | |
2730 | netdev->vlan_features |= NETIF_F_IP_CSUM; | |
2731 | netdev->vlan_features |= NETIF_F_IPV6_CSUM; | |
2732 | netdev->vlan_features |= NETIF_F_SG; | |
2733 | ||
2734 | /*reset the controller to put the device in a known good state */ | |
2735 | err = hw->mac.ops.reset_hw(hw); | |
2736 | if (err) { | |
2737 | dev_info(&pdev->dev, | |
2738 | "PF still in reset state, assigning new address\n"); | |
2739 | random_ether_addr(hw->mac.addr); | |
2740 | } else { | |
2741 | err = hw->mac.ops.read_mac_addr(hw); | |
2742 | if (err) { | |
2743 | dev_err(&pdev->dev, "Error reading MAC address\n"); | |
2744 | goto err_hw_init; | |
2745 | } | |
2746 | } | |
2747 | ||
2748 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); | |
2749 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); | |
2750 | ||
2751 | if (!is_valid_ether_addr(netdev->perm_addr)) { | |
2752 | dev_err(&pdev->dev, "Invalid MAC Address: " | |
2753 | "%02x:%02x:%02x:%02x:%02x:%02x\n", | |
2754 | netdev->dev_addr[0], netdev->dev_addr[1], | |
2755 | netdev->dev_addr[2], netdev->dev_addr[3], | |
2756 | netdev->dev_addr[4], netdev->dev_addr[5]); | |
2757 | err = -EIO; | |
2758 | goto err_hw_init; | |
2759 | } | |
2760 | ||
2761 | setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, | |
2762 | (unsigned long) adapter); | |
2763 | ||
2764 | INIT_WORK(&adapter->reset_task, igbvf_reset_task); | |
2765 | INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); | |
2766 | ||
2767 | /* ring size defaults */ | |
2768 | adapter->rx_ring->count = 1024; | |
2769 | adapter->tx_ring->count = 1024; | |
2770 | ||
2771 | /* reset the hardware with the new settings */ | |
2772 | igbvf_reset(adapter); | |
2773 | ||
2774 | /* tell the stack to leave us alone until igbvf_open() is called */ | |
2775 | netif_carrier_off(netdev); | |
2776 | netif_stop_queue(netdev); | |
2777 | ||
2778 | strcpy(netdev->name, "eth%d"); | |
2779 | err = register_netdev(netdev); | |
2780 | if (err) | |
2781 | goto err_hw_init; | |
2782 | ||
2783 | igbvf_print_device_info(adapter); | |
2784 | ||
2785 | igbvf_initialize_last_counter_stats(adapter); | |
2786 | ||
2787 | return 0; | |
2788 | ||
2789 | err_hw_init: | |
2790 | kfree(adapter->tx_ring); | |
2791 | kfree(adapter->rx_ring); | |
2792 | err_sw_init: | |
2793 | igbvf_reset_interrupt_capability(adapter); | |
2794 | iounmap(adapter->hw.hw_addr); | |
2795 | err_ioremap: | |
2796 | free_netdev(netdev); | |
2797 | err_alloc_etherdev: | |
2798 | pci_release_regions(pdev); | |
2799 | err_pci_reg: | |
2800 | err_dma: | |
2801 | pci_disable_device(pdev); | |
2802 | return err; | |
2803 | } | |
2804 | ||
2805 | /** | |
2806 | * igbvf_remove - Device Removal Routine | |
2807 | * @pdev: PCI device information struct | |
2808 | * | |
2809 | * igbvf_remove is called by the PCI subsystem to alert the driver | |
2810 | * that it should release a PCI device. The could be caused by a | |
2811 | * Hot-Plug event, or because the driver is going to be removed from | |
2812 | * memory. | |
2813 | **/ | |
2814 | static void __devexit igbvf_remove(struct pci_dev *pdev) | |
2815 | { | |
2816 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2817 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2818 | struct e1000_hw *hw = &adapter->hw; | |
2819 | ||
2820 | /* | |
2821 | * flush_scheduled work may reschedule our watchdog task, so | |
2822 | * explicitly disable watchdog tasks from being rescheduled | |
2823 | */ | |
2824 | set_bit(__IGBVF_DOWN, &adapter->state); | |
2825 | del_timer_sync(&adapter->watchdog_timer); | |
2826 | ||
2827 | flush_scheduled_work(); | |
2828 | ||
2829 | unregister_netdev(netdev); | |
2830 | ||
2831 | igbvf_reset_interrupt_capability(adapter); | |
2832 | ||
2833 | /* | |
2834 | * it is important to delete the napi struct prior to freeing the | |
2835 | * rx ring so that you do not end up with null pointer refs | |
2836 | */ | |
2837 | netif_napi_del(&adapter->rx_ring->napi); | |
2838 | kfree(adapter->tx_ring); | |
2839 | kfree(adapter->rx_ring); | |
2840 | ||
2841 | iounmap(hw->hw_addr); | |
2842 | if (hw->flash_address) | |
2843 | iounmap(hw->flash_address); | |
2844 | pci_release_regions(pdev); | |
2845 | ||
2846 | free_netdev(netdev); | |
2847 | ||
2848 | pci_disable_device(pdev); | |
2849 | } | |
2850 | ||
2851 | /* PCI Error Recovery (ERS) */ | |
2852 | static struct pci_error_handlers igbvf_err_handler = { | |
2853 | .error_detected = igbvf_io_error_detected, | |
2854 | .slot_reset = igbvf_io_slot_reset, | |
2855 | .resume = igbvf_io_resume, | |
2856 | }; | |
2857 | ||
2858 | static struct pci_device_id igbvf_pci_tbl[] = { | |
2859 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, | |
2860 | { } /* terminate list */ | |
2861 | }; | |
2862 | MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); | |
2863 | ||
2864 | /* PCI Device API Driver */ | |
2865 | static struct pci_driver igbvf_driver = { | |
2866 | .name = igbvf_driver_name, | |
2867 | .id_table = igbvf_pci_tbl, | |
2868 | .probe = igbvf_probe, | |
2869 | .remove = __devexit_p(igbvf_remove), | |
2870 | #ifdef CONFIG_PM | |
2871 | /* Power Management Hooks */ | |
2872 | .suspend = igbvf_suspend, | |
2873 | .resume = igbvf_resume, | |
2874 | #endif | |
2875 | .shutdown = igbvf_shutdown, | |
2876 | .err_handler = &igbvf_err_handler | |
2877 | }; | |
2878 | ||
2879 | /** | |
2880 | * igbvf_init_module - Driver Registration Routine | |
2881 | * | |
2882 | * igbvf_init_module is the first routine called when the driver is | |
2883 | * loaded. All it does is register with the PCI subsystem. | |
2884 | **/ | |
2885 | static int __init igbvf_init_module(void) | |
2886 | { | |
2887 | int ret; | |
2888 | printk(KERN_INFO "%s - version %s\n", | |
2889 | igbvf_driver_string, igbvf_driver_version); | |
2890 | printk(KERN_INFO "%s\n", igbvf_copyright); | |
2891 | ||
2892 | ret = pci_register_driver(&igbvf_driver); | |
2893 | pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name, | |
2894 | PM_QOS_DEFAULT_VALUE); | |
2895 | ||
2896 | return ret; | |
2897 | } | |
2898 | module_init(igbvf_init_module); | |
2899 | ||
2900 | /** | |
2901 | * igbvf_exit_module - Driver Exit Cleanup Routine | |
2902 | * | |
2903 | * igbvf_exit_module is called just before the driver is removed | |
2904 | * from memory. | |
2905 | **/ | |
2906 | static void __exit igbvf_exit_module(void) | |
2907 | { | |
2908 | pci_unregister_driver(&igbvf_driver); | |
2909 | pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name); | |
2910 | } | |
2911 | module_exit(igbvf_exit_module); | |
2912 | ||
2913 | ||
2914 | MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); | |
2915 | MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver"); | |
2916 | MODULE_LICENSE("GPL"); | |
2917 | MODULE_VERSION(DRV_VERSION); | |
2918 | ||
2919 | /* netdev.c */ |