1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright(c) 2009 - 2018 Intel Corporation. */ |
3 | |
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
5 | |
6 | #include <linux/module.h> |
7 | #include <linux/types.h> |
8 | #include <linux/init.h> |
9 | #include <linux/pci.h> |
10 | #include <linux/vmalloc.h> |
11 | #include <linux/pagemap.h> |
12 | #include <linux/delay.h> |
13 | #include <linux/netdevice.h> |
14 | #include <linux/tcp.h> |
15 | #include <linux/ipv6.h> |
16 | #include <linux/slab.h> |
17 | #include <net/checksum.h> |
18 | #include <net/ip6_checksum.h> |
19 | #include <linux/mii.h> |
20 | #include <linux/ethtool.h> |
21 | #include <linux/if_vlan.h> |
22 | #include <linux/prefetch.h> |
23 | #include <linux/sctp.h> |
24 | |
25 | #include "igbvf.h" |
26 | |
27 | char igbvf_driver_name[] = "igbvf" ; |
28 | static const char igbvf_driver_string[] = |
29 | "Intel(R) Gigabit Virtual Function Network Driver" ; |
30 | static const char igbvf_copyright[] = |
31 | "Copyright (c) 2009 - 2012 Intel Corporation." ; |
32 | |
33 | #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
34 | static int debug = -1; |
35 | module_param(debug, int, 0); |
36 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)" ); |
37 | |
38 | static int igbvf_poll(struct napi_struct *napi, int budget); |
39 | static void igbvf_reset(struct igbvf_adapter *); |
40 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *); |
41 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); |
42 | |
43 | static struct igbvf_info igbvf_vf_info = { |
44 | .mac = e1000_vfadapt, |
45 | .flags = 0, |
46 | .pba = 10, |
47 | .init_ops = e1000_init_function_pointers_vf, |
48 | }; |
49 | |
50 | static struct igbvf_info igbvf_i350_vf_info = { |
51 | .mac = e1000_vfadapt_i350, |
52 | .flags = 0, |
53 | .pba = 10, |
54 | .init_ops = e1000_init_function_pointers_vf, |
55 | }; |
56 | |
57 | static const struct igbvf_info *igbvf_info_tbl[] = { |
58 | [board_vf] = &igbvf_vf_info, |
59 | [board_i350_vf] = &igbvf_i350_vf_info, |
60 | }; |
61 | |
62 | /** |
63 | * igbvf_desc_unused - calculate if we have unused descriptors |
64 | * @ring: address of receive ring structure |
65 | **/ |
66 | static int igbvf_desc_unused(struct igbvf_ring *ring) |
67 | { |
68 | if (ring->next_to_clean > ring->next_to_use) |
69 | return ring->next_to_clean - ring->next_to_use - 1; |
70 | |
71 | return ring->count + ring->next_to_clean - ring->next_to_use - 1; |
72 | } |
73 | |
74 | /** |
75 | * igbvf_receive_skb - helper function to handle Rx indications |
76 | * @adapter: board private structure |
77 | * @netdev: pointer to netdev struct |
78 | * @skb: skb to indicate to stack |
79 | * @status: descriptor status field as written by hardware |
80 | * @vlan: descriptor vlan field as written by hardware (no le/be conversion) |
81 | * @skb: pointer to sk_buff to be indicated to stack |
82 | **/ |
83 | static void igbvf_receive_skb(struct igbvf_adapter *adapter, |
84 | struct net_device *netdev, |
85 | struct sk_buff *skb, |
86 | u32 status, __le16 vlan) |
87 | { |
88 | u16 vid; |
89 | |
90 | if (status & E1000_RXD_STAT_VP) { |
91 | if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) && |
92 | (status & E1000_RXDEXT_STATERR_LB)) |
93 | vid = be16_to_cpu((__force __be16)vlan) & E1000_RXD_SPC_VLAN_MASK; |
94 | else |
95 | vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; |
96 | if (test_bit(vid, adapter->active_vlans)) |
97 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci: vid); |
98 | } |
99 | |
100 | napi_gro_receive(napi: &adapter->rx_ring->napi, skb); |
101 | } |
102 | |
103 | static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, |
104 | u32 status_err, struct sk_buff *skb) |
105 | { |
106 | skb_checksum_none_assert(skb); |
107 | |
108 | /* Ignore Checksum bit is set or checksum is disabled through ethtool */ |
109 | if ((status_err & E1000_RXD_STAT_IXSM) || |
110 | (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED)) |
111 | return; |
112 | |
113 | /* TCP/UDP checksum error bit is set */ |
114 | if (status_err & |
115 | (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { |
116 | /* let the stack verify checksum errors */ |
117 | adapter->hw_csum_err++; |
118 | return; |
119 | } |
120 | |
121 | /* It must be a TCP or UDP packet with a valid checksum */ |
122 | if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) |
123 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
124 | |
125 | adapter->hw_csum_good++; |
126 | } |
127 | |
128 | /** |
129 | * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split |
130 | * @rx_ring: address of ring structure to repopulate |
131 | * @cleaned_count: number of buffers to repopulate |
132 | **/ |
133 | static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, |
134 | int cleaned_count) |
135 | { |
136 | struct igbvf_adapter *adapter = rx_ring->adapter; |
137 | struct net_device *netdev = adapter->netdev; |
138 | struct pci_dev *pdev = adapter->pdev; |
139 | union e1000_adv_rx_desc *rx_desc; |
140 | struct igbvf_buffer *buffer_info; |
141 | struct sk_buff *skb; |
142 | unsigned int i; |
143 | int bufsz; |
144 | |
145 | i = rx_ring->next_to_use; |
146 | buffer_info = &rx_ring->buffer_info[i]; |
147 | |
148 | if (adapter->rx_ps_hdr_size) |
149 | bufsz = adapter->rx_ps_hdr_size; |
150 | else |
151 | bufsz = adapter->rx_buffer_len; |
152 | |
153 | while (cleaned_count--) { |
154 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); |
155 | |
156 | if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { |
157 | if (!buffer_info->page) { |
158 | buffer_info->page = alloc_page(GFP_ATOMIC); |
159 | if (!buffer_info->page) { |
160 | adapter->alloc_rx_buff_failed++; |
161 | goto no_buffers; |
162 | } |
163 | buffer_info->page_offset = 0; |
164 | } else { |
165 | buffer_info->page_offset ^= PAGE_SIZE / 2; |
166 | } |
167 | buffer_info->page_dma = |
168 | dma_map_page(&pdev->dev, buffer_info->page, |
169 | buffer_info->page_offset, |
170 | PAGE_SIZE / 2, |
171 | DMA_FROM_DEVICE); |
172 | if (dma_mapping_error(dev: &pdev->dev, |
173 | dma_addr: buffer_info->page_dma)) { |
174 | __free_page(buffer_info->page); |
175 | buffer_info->page = NULL; |
176 | dev_err(&pdev->dev, "RX DMA map failed\n" ); |
177 | break; |
178 | } |
179 | } |
180 | |
181 | if (!buffer_info->skb) { |
182 | skb = netdev_alloc_skb_ip_align(dev: netdev, length: bufsz); |
183 | if (!skb) { |
184 | adapter->alloc_rx_buff_failed++; |
185 | goto no_buffers; |
186 | } |
187 | |
188 | buffer_info->skb = skb; |
189 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, |
190 | bufsz, |
191 | DMA_FROM_DEVICE); |
192 | if (dma_mapping_error(dev: &pdev->dev, dma_addr: buffer_info->dma)) { |
193 | dev_kfree_skb(buffer_info->skb); |
194 | buffer_info->skb = NULL; |
195 | dev_err(&pdev->dev, "RX DMA map failed\n" ); |
196 | goto no_buffers; |
197 | } |
198 | } |
199 | /* Refresh the desc even if buffer_addrs didn't change because |
200 | * each write-back erases this info. |
201 | */ |
202 | if (adapter->rx_ps_hdr_size) { |
203 | rx_desc->read.pkt_addr = |
204 | cpu_to_le64(buffer_info->page_dma); |
205 | rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); |
206 | } else { |
207 | rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma); |
208 | rx_desc->read.hdr_addr = 0; |
209 | } |
210 | |
211 | i++; |
212 | if (i == rx_ring->count) |
213 | i = 0; |
214 | buffer_info = &rx_ring->buffer_info[i]; |
215 | } |
216 | |
217 | no_buffers: |
218 | if (rx_ring->next_to_use != i) { |
219 | rx_ring->next_to_use = i; |
220 | if (i == 0) |
221 | i = (rx_ring->count - 1); |
222 | else |
223 | i--; |
224 | |
225 | /* Force memory writes to complete before letting h/w |
226 | * know there are new descriptors to fetch. (Only |
227 | * applicable for weak-ordered memory model archs, |
228 | * such as IA-64). |
229 | */ |
230 | wmb(); |
231 | writel(val: i, addr: adapter->hw.hw_addr + rx_ring->tail); |
232 | } |
233 | } |
234 | |
235 | /** |
236 | * igbvf_clean_rx_irq - Send received data up the network stack; legacy |
237 | * @adapter: board private structure |
238 | * @work_done: output parameter used to indicate completed work |
239 | * @work_to_do: input parameter setting limit of work |
240 | * |
241 | * the return value indicates whether actual cleaning was done, there |
242 | * is no guarantee that everything was cleaned |
243 | **/ |
244 | static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, |
245 | int *work_done, int work_to_do) |
246 | { |
247 | struct igbvf_ring *rx_ring = adapter->rx_ring; |
248 | struct net_device *netdev = adapter->netdev; |
249 | struct pci_dev *pdev = adapter->pdev; |
250 | union e1000_adv_rx_desc *rx_desc, *next_rxd; |
251 | struct igbvf_buffer *buffer_info, *next_buffer; |
252 | struct sk_buff *skb; |
253 | bool cleaned = false; |
254 | int cleaned_count = 0; |
255 | unsigned int total_bytes = 0, total_packets = 0; |
256 | unsigned int i; |
257 | u32 length, hlen, staterr; |
258 | |
259 | i = rx_ring->next_to_clean; |
260 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); |
261 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); |
262 | |
263 | while (staterr & E1000_RXD_STAT_DD) { |
264 | if (*work_done >= work_to_do) |
265 | break; |
266 | (*work_done)++; |
267 | rmb(); /* read descriptor and rx_buffer_info after status DD */ |
268 | |
269 | buffer_info = &rx_ring->buffer_info[i]; |
270 | |
271 | /* HW will not DMA in data larger than the given buffer, even |
272 | * if it parses the (NFS, of course) header to be larger. In |
273 | * that case, it fills the header buffer and spills the rest |
274 | * into the page. |
275 | */ |
276 | hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) |
277 | & E1000_RXDADV_HDRBUFLEN_MASK) >> |
278 | E1000_RXDADV_HDRBUFLEN_SHIFT; |
279 | if (hlen > adapter->rx_ps_hdr_size) |
280 | hlen = adapter->rx_ps_hdr_size; |
281 | |
282 | length = le16_to_cpu(rx_desc->wb.upper.length); |
283 | cleaned = true; |
284 | cleaned_count++; |
285 | |
286 | skb = buffer_info->skb; |
287 | prefetch(skb->data - NET_IP_ALIGN); |
288 | buffer_info->skb = NULL; |
289 | if (!adapter->rx_ps_hdr_size) { |
290 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
291 | adapter->rx_buffer_len, |
292 | DMA_FROM_DEVICE); |
293 | buffer_info->dma = 0; |
294 | skb_put(skb, len: length); |
295 | goto send_up; |
296 | } |
297 | |
298 | if (!skb_shinfo(skb)->nr_frags) { |
299 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
300 | adapter->rx_ps_hdr_size, |
301 | DMA_FROM_DEVICE); |
302 | buffer_info->dma = 0; |
303 | skb_put(skb, len: hlen); |
304 | } |
305 | |
306 | if (length) { |
307 | dma_unmap_page(&pdev->dev, buffer_info->page_dma, |
308 | PAGE_SIZE / 2, |
309 | DMA_FROM_DEVICE); |
310 | buffer_info->page_dma = 0; |
311 | |
312 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, |
313 | page: buffer_info->page, |
314 | off: buffer_info->page_offset, |
315 | size: length); |
316 | |
317 | if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || |
318 | (page_count(page: buffer_info->page) != 1)) |
319 | buffer_info->page = NULL; |
320 | else |
321 | get_page(page: buffer_info->page); |
322 | |
323 | skb->len += length; |
324 | skb->data_len += length; |
325 | skb->truesize += PAGE_SIZE / 2; |
326 | } |
327 | send_up: |
328 | i++; |
329 | if (i == rx_ring->count) |
330 | i = 0; |
331 | next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); |
332 | prefetch(next_rxd); |
333 | next_buffer = &rx_ring->buffer_info[i]; |
334 | |
335 | if (!(staterr & E1000_RXD_STAT_EOP)) { |
336 | buffer_info->skb = next_buffer->skb; |
337 | buffer_info->dma = next_buffer->dma; |
338 | next_buffer->skb = skb; |
339 | next_buffer->dma = 0; |
340 | goto next_desc; |
341 | } |
342 | |
343 | if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { |
344 | dev_kfree_skb_irq(skb); |
345 | goto next_desc; |
346 | } |
347 | |
348 | total_bytes += skb->len; |
349 | total_packets++; |
350 | |
351 | igbvf_rx_checksum_adv(adapter, status_err: staterr, skb); |
352 | |
353 | skb->protocol = eth_type_trans(skb, dev: netdev); |
354 | |
355 | igbvf_receive_skb(adapter, netdev, skb, status: staterr, |
356 | vlan: rx_desc->wb.upper.vlan); |
357 | |
358 | next_desc: |
359 | rx_desc->wb.upper.status_error = 0; |
360 | |
361 | /* return some buffers to hardware, one at a time is too slow */ |
362 | if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { |
363 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); |
364 | cleaned_count = 0; |
365 | } |
366 | |
367 | /* use prefetched values */ |
368 | rx_desc = next_rxd; |
369 | buffer_info = next_buffer; |
370 | |
371 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); |
372 | } |
373 | |
374 | rx_ring->next_to_clean = i; |
375 | cleaned_count = igbvf_desc_unused(ring: rx_ring); |
376 | |
377 | if (cleaned_count) |
378 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); |
379 | |
380 | adapter->total_rx_packets += total_packets; |
381 | adapter->total_rx_bytes += total_bytes; |
382 | netdev->stats.rx_bytes += total_bytes; |
383 | netdev->stats.rx_packets += total_packets; |
384 | return cleaned; |
385 | } |
386 | |
387 | static void igbvf_put_txbuf(struct igbvf_adapter *adapter, |
388 | struct igbvf_buffer *buffer_info) |
389 | { |
390 | if (buffer_info->dma) { |
391 | if (buffer_info->mapped_as_page) |
392 | dma_unmap_page(&adapter->pdev->dev, |
393 | buffer_info->dma, |
394 | buffer_info->length, |
395 | DMA_TO_DEVICE); |
396 | else |
397 | dma_unmap_single(&adapter->pdev->dev, |
398 | buffer_info->dma, |
399 | buffer_info->length, |
400 | DMA_TO_DEVICE); |
401 | buffer_info->dma = 0; |
402 | } |
403 | if (buffer_info->skb) { |
404 | dev_kfree_skb_any(skb: buffer_info->skb); |
405 | buffer_info->skb = NULL; |
406 | } |
407 | buffer_info->time_stamp = 0; |
408 | } |
409 | |
410 | /** |
411 | * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) |
412 | * @adapter: board private structure |
413 | * @tx_ring: ring being initialized |
414 | * |
415 | * Return 0 on success, negative on failure |
416 | **/ |
417 | int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, |
418 | struct igbvf_ring *tx_ring) |
419 | { |
420 | struct pci_dev *pdev = adapter->pdev; |
421 | int size; |
422 | |
423 | size = sizeof(struct igbvf_buffer) * tx_ring->count; |
424 | tx_ring->buffer_info = vzalloc(size); |
425 | if (!tx_ring->buffer_info) |
426 | goto err; |
427 | |
428 | /* round up to nearest 4K */ |
429 | tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); |
430 | tx_ring->size = ALIGN(tx_ring->size, 4096); |
431 | |
432 | tx_ring->desc = dma_alloc_coherent(dev: &pdev->dev, size: tx_ring->size, |
433 | dma_handle: &tx_ring->dma, GFP_KERNEL); |
434 | if (!tx_ring->desc) |
435 | goto err; |
436 | |
437 | tx_ring->adapter = adapter; |
438 | tx_ring->next_to_use = 0; |
439 | tx_ring->next_to_clean = 0; |
440 | |
441 | return 0; |
442 | err: |
443 | vfree(addr: tx_ring->buffer_info); |
444 | dev_err(&adapter->pdev->dev, |
445 | "Unable to allocate memory for the transmit descriptor ring\n" ); |
446 | return -ENOMEM; |
447 | } |
448 | |
449 | /** |
450 | * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) |
451 | * @adapter: board private structure |
452 | * @rx_ring: ring being initialized |
453 | * |
454 | * Returns 0 on success, negative on failure |
455 | **/ |
456 | int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, |
457 | struct igbvf_ring *rx_ring) |
458 | { |
459 | struct pci_dev *pdev = adapter->pdev; |
460 | int size, desc_len; |
461 | |
462 | size = sizeof(struct igbvf_buffer) * rx_ring->count; |
463 | rx_ring->buffer_info = vzalloc(size); |
464 | if (!rx_ring->buffer_info) |
465 | goto err; |
466 | |
467 | desc_len = sizeof(union e1000_adv_rx_desc); |
468 | |
469 | /* Round up to nearest 4K */ |
470 | rx_ring->size = rx_ring->count * desc_len; |
471 | rx_ring->size = ALIGN(rx_ring->size, 4096); |
472 | |
473 | rx_ring->desc = dma_alloc_coherent(dev: &pdev->dev, size: rx_ring->size, |
474 | dma_handle: &rx_ring->dma, GFP_KERNEL); |
475 | if (!rx_ring->desc) |
476 | goto err; |
477 | |
478 | rx_ring->next_to_clean = 0; |
479 | rx_ring->next_to_use = 0; |
480 | |
481 | rx_ring->adapter = adapter; |
482 | |
483 | return 0; |
484 | |
485 | err: |
486 | vfree(addr: rx_ring->buffer_info); |
487 | rx_ring->buffer_info = NULL; |
488 | dev_err(&adapter->pdev->dev, |
489 | "Unable to allocate memory for the receive descriptor ring\n" ); |
490 | return -ENOMEM; |
491 | } |
492 | |
493 | /** |
494 | * igbvf_clean_tx_ring - Free Tx Buffers |
495 | * @tx_ring: ring to be cleaned |
496 | **/ |
497 | static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) |
498 | { |
499 | struct igbvf_adapter *adapter = tx_ring->adapter; |
500 | struct igbvf_buffer *buffer_info; |
501 | unsigned long size; |
502 | unsigned int i; |
503 | |
504 | if (!tx_ring->buffer_info) |
505 | return; |
506 | |
507 | /* Free all the Tx ring sk_buffs */ |
508 | for (i = 0; i < tx_ring->count; i++) { |
509 | buffer_info = &tx_ring->buffer_info[i]; |
510 | igbvf_put_txbuf(adapter, buffer_info); |
511 | } |
512 | |
513 | size = sizeof(struct igbvf_buffer) * tx_ring->count; |
514 | memset(tx_ring->buffer_info, 0, size); |
515 | |
516 | /* Zero out the descriptor ring */ |
517 | memset(tx_ring->desc, 0, tx_ring->size); |
518 | |
519 | tx_ring->next_to_use = 0; |
520 | tx_ring->next_to_clean = 0; |
521 | |
522 | writel(val: 0, addr: adapter->hw.hw_addr + tx_ring->head); |
523 | writel(val: 0, addr: adapter->hw.hw_addr + tx_ring->tail); |
524 | } |
525 | |
526 | /** |
527 | * igbvf_free_tx_resources - Free Tx Resources per Queue |
528 | * @tx_ring: ring to free resources from |
529 | * |
530 | * Free all transmit software resources |
531 | **/ |
532 | void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) |
533 | { |
534 | struct pci_dev *pdev = tx_ring->adapter->pdev; |
535 | |
536 | igbvf_clean_tx_ring(tx_ring); |
537 | |
538 | vfree(addr: tx_ring->buffer_info); |
539 | tx_ring->buffer_info = NULL; |
540 | |
541 | dma_free_coherent(dev: &pdev->dev, size: tx_ring->size, cpu_addr: tx_ring->desc, |
542 | dma_handle: tx_ring->dma); |
543 | |
544 | tx_ring->desc = NULL; |
545 | } |
546 | |
547 | /** |
548 | * igbvf_clean_rx_ring - Free Rx Buffers per Queue |
549 | * @rx_ring: ring structure pointer to free buffers from |
550 | **/ |
551 | static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) |
552 | { |
553 | struct igbvf_adapter *adapter = rx_ring->adapter; |
554 | struct igbvf_buffer *buffer_info; |
555 | struct pci_dev *pdev = adapter->pdev; |
556 | unsigned long size; |
557 | unsigned int i; |
558 | |
559 | if (!rx_ring->buffer_info) |
560 | return; |
561 | |
562 | /* Free all the Rx ring sk_buffs */ |
563 | for (i = 0; i < rx_ring->count; i++) { |
564 | buffer_info = &rx_ring->buffer_info[i]; |
565 | if (buffer_info->dma) { |
566 | if (adapter->rx_ps_hdr_size) { |
567 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
568 | adapter->rx_ps_hdr_size, |
569 | DMA_FROM_DEVICE); |
570 | } else { |
571 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
572 | adapter->rx_buffer_len, |
573 | DMA_FROM_DEVICE); |
574 | } |
575 | buffer_info->dma = 0; |
576 | } |
577 | |
578 | if (buffer_info->skb) { |
579 | dev_kfree_skb(buffer_info->skb); |
580 | buffer_info->skb = NULL; |
581 | } |
582 | |
583 | if (buffer_info->page) { |
584 | if (buffer_info->page_dma) |
585 | dma_unmap_page(&pdev->dev, |
586 | buffer_info->page_dma, |
587 | PAGE_SIZE / 2, |
588 | DMA_FROM_DEVICE); |
589 | put_page(page: buffer_info->page); |
590 | buffer_info->page = NULL; |
591 | buffer_info->page_dma = 0; |
592 | buffer_info->page_offset = 0; |
593 | } |
594 | } |
595 | |
596 | size = sizeof(struct igbvf_buffer) * rx_ring->count; |
597 | memset(rx_ring->buffer_info, 0, size); |
598 | |
599 | /* Zero out the descriptor ring */ |
600 | memset(rx_ring->desc, 0, rx_ring->size); |
601 | |
602 | rx_ring->next_to_clean = 0; |
603 | rx_ring->next_to_use = 0; |
604 | |
605 | writel(val: 0, addr: adapter->hw.hw_addr + rx_ring->head); |
606 | writel(val: 0, addr: adapter->hw.hw_addr + rx_ring->tail); |
607 | } |
608 | |
609 | /** |
610 | * igbvf_free_rx_resources - Free Rx Resources |
611 | * @rx_ring: ring to clean the resources from |
612 | * |
613 | * Free all receive software resources |
614 | **/ |
615 | |
616 | void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) |
617 | { |
618 | struct pci_dev *pdev = rx_ring->adapter->pdev; |
619 | |
620 | igbvf_clean_rx_ring(rx_ring); |
621 | |
622 | vfree(addr: rx_ring->buffer_info); |
623 | rx_ring->buffer_info = NULL; |
624 | |
625 | dma_free_coherent(dev: &pdev->dev, size: rx_ring->size, cpu_addr: rx_ring->desc, |
626 | dma_handle: rx_ring->dma); |
627 | rx_ring->desc = NULL; |
628 | } |
629 | |
630 | /** |
631 | * igbvf_update_itr - update the dynamic ITR value based on statistics |
632 | * @adapter: pointer to adapter |
633 | * @itr_setting: current adapter->itr |
634 | * @packets: the number of packets during this measurement interval |
635 | * @bytes: the number of bytes during this measurement interval |
636 | * |
637 | * Stores a new ITR value based on packets and byte counts during the last |
638 | * interrupt. The advantage of per interrupt computation is faster updates |
639 | * and more accurate ITR for the current traffic pattern. Constants in this |
640 | * function were computed based on theoretical maximum wire speed and thresholds |
641 | * were set based on testing data as well as attempting to minimize response |
642 | * time while increasing bulk throughput. |
643 | **/ |
644 | static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter, |
645 | enum latency_range itr_setting, |
646 | int packets, int bytes) |
647 | { |
648 | enum latency_range retval = itr_setting; |
649 | |
650 | if (packets == 0) |
651 | goto update_itr_done; |
652 | |
653 | switch (itr_setting) { |
654 | case lowest_latency: |
655 | /* handle TSO and jumbo frames */ |
656 | if (bytes/packets > 8000) |
657 | retval = bulk_latency; |
658 | else if ((packets < 5) && (bytes > 512)) |
659 | retval = low_latency; |
660 | break; |
661 | case low_latency: /* 50 usec aka 20000 ints/s */ |
662 | if (bytes > 10000) { |
663 | /* this if handles the TSO accounting */ |
664 | if (bytes/packets > 8000) |
665 | retval = bulk_latency; |
666 | else if ((packets < 10) || ((bytes/packets) > 1200)) |
667 | retval = bulk_latency; |
668 | else if ((packets > 35)) |
669 | retval = lowest_latency; |
670 | } else if (bytes/packets > 2000) { |
671 | retval = bulk_latency; |
672 | } else if (packets <= 2 && bytes < 512) { |
673 | retval = lowest_latency; |
674 | } |
675 | break; |
676 | case bulk_latency: /* 250 usec aka 4000 ints/s */ |
677 | if (bytes > 25000) { |
678 | if (packets > 35) |
679 | retval = low_latency; |
680 | } else if (bytes < 6000) { |
681 | retval = low_latency; |
682 | } |
683 | break; |
684 | default: |
685 | break; |
686 | } |
687 | |
688 | update_itr_done: |
689 | return retval; |
690 | } |
691 | |
692 | static int igbvf_range_to_itr(enum latency_range current_range) |
693 | { |
694 | int new_itr; |
695 | |
696 | switch (current_range) { |
697 | /* counts and packets in update_itr are dependent on these numbers */ |
698 | case lowest_latency: |
699 | new_itr = IGBVF_70K_ITR; |
700 | break; |
701 | case low_latency: |
702 | new_itr = IGBVF_20K_ITR; |
703 | break; |
704 | case bulk_latency: |
705 | new_itr = IGBVF_4K_ITR; |
706 | break; |
707 | default: |
708 | new_itr = IGBVF_START_ITR; |
709 | break; |
710 | } |
711 | return new_itr; |
712 | } |
713 | |
714 | static void igbvf_set_itr(struct igbvf_adapter *adapter) |
715 | { |
716 | u32 new_itr; |
717 | |
718 | adapter->tx_ring->itr_range = |
719 | igbvf_update_itr(adapter, |
720 | itr_setting: adapter->tx_ring->itr_val, |
721 | packets: adapter->total_tx_packets, |
722 | bytes: adapter->total_tx_bytes); |
723 | |
724 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
725 | if (adapter->requested_itr == 3 && |
726 | adapter->tx_ring->itr_range == lowest_latency) |
727 | adapter->tx_ring->itr_range = low_latency; |
728 | |
729 | new_itr = igbvf_range_to_itr(current_range: adapter->tx_ring->itr_range); |
730 | |
731 | if (new_itr != adapter->tx_ring->itr_val) { |
732 | u32 current_itr = adapter->tx_ring->itr_val; |
733 | /* this attempts to bias the interrupt rate towards Bulk |
734 | * by adding intermediate steps when interrupt rate is |
735 | * increasing |
736 | */ |
737 | new_itr = new_itr > current_itr ? |
738 | min(current_itr + (new_itr >> 2), new_itr) : |
739 | new_itr; |
740 | adapter->tx_ring->itr_val = new_itr; |
741 | |
742 | adapter->tx_ring->set_itr = 1; |
743 | } |
744 | |
745 | adapter->rx_ring->itr_range = |
746 | igbvf_update_itr(adapter, itr_setting: adapter->rx_ring->itr_val, |
747 | packets: adapter->total_rx_packets, |
748 | bytes: adapter->total_rx_bytes); |
749 | if (adapter->requested_itr == 3 && |
750 | adapter->rx_ring->itr_range == lowest_latency) |
751 | adapter->rx_ring->itr_range = low_latency; |
752 | |
753 | new_itr = igbvf_range_to_itr(current_range: adapter->rx_ring->itr_range); |
754 | |
755 | if (new_itr != adapter->rx_ring->itr_val) { |
756 | u32 current_itr = adapter->rx_ring->itr_val; |
757 | |
758 | new_itr = new_itr > current_itr ? |
759 | min(current_itr + (new_itr >> 2), new_itr) : |
760 | new_itr; |
761 | adapter->rx_ring->itr_val = new_itr; |
762 | |
763 | adapter->rx_ring->set_itr = 1; |
764 | } |
765 | } |
766 | |
767 | /** |
768 | * igbvf_clean_tx_irq - Reclaim resources after transmit completes |
769 | * @tx_ring: ring structure to clean descriptors from |
770 | * |
771 | * returns true if ring is completely cleaned |
772 | **/ |
773 | static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) |
774 | { |
775 | struct igbvf_adapter *adapter = tx_ring->adapter; |
776 | struct net_device *netdev = adapter->netdev; |
777 | struct igbvf_buffer *buffer_info; |
778 | struct sk_buff *skb; |
779 | union e1000_adv_tx_desc *tx_desc, *eop_desc; |
780 | unsigned int total_bytes = 0, total_packets = 0; |
781 | unsigned int i, count = 0; |
782 | bool cleaned = false; |
783 | |
784 | i = tx_ring->next_to_clean; |
785 | buffer_info = &tx_ring->buffer_info[i]; |
786 | eop_desc = buffer_info->next_to_watch; |
787 | |
788 | do { |
789 | /* if next_to_watch is not set then there is no work pending */ |
790 | if (!eop_desc) |
791 | break; |
792 | |
793 | /* prevent any other reads prior to eop_desc */ |
794 | smp_rmb(); |
795 | |
796 | /* if DD is not set pending work has not been completed */ |
797 | if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD))) |
798 | break; |
799 | |
800 | /* clear next_to_watch to prevent false hangs */ |
801 | buffer_info->next_to_watch = NULL; |
802 | |
803 | for (cleaned = false; !cleaned; count++) { |
804 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); |
805 | cleaned = (tx_desc == eop_desc); |
806 | skb = buffer_info->skb; |
807 | |
808 | if (skb) { |
809 | unsigned int segs, bytecount; |
810 | |
811 | /* gso_segs is currently only valid for tcp */ |
812 | segs = skb_shinfo(skb)->gso_segs ?: 1; |
813 | /* multiply data chunks by size of headers */ |
814 | bytecount = ((segs - 1) * skb_headlen(skb)) + |
815 | skb->len; |
816 | total_packets += segs; |
817 | total_bytes += bytecount; |
818 | } |
819 | |
820 | igbvf_put_txbuf(adapter, buffer_info); |
821 | tx_desc->wb.status = 0; |
822 | |
823 | i++; |
824 | if (i == tx_ring->count) |
825 | i = 0; |
826 | |
827 | buffer_info = &tx_ring->buffer_info[i]; |
828 | } |
829 | |
830 | eop_desc = buffer_info->next_to_watch; |
831 | } while (count < tx_ring->count); |
832 | |
833 | tx_ring->next_to_clean = i; |
834 | |
835 | if (unlikely(count && netif_carrier_ok(netdev) && |
836 | igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { |
837 | /* Make sure that anybody stopping the queue after this |
838 | * sees the new next_to_clean. |
839 | */ |
840 | smp_mb(); |
841 | if (netif_queue_stopped(dev: netdev) && |
842 | !(test_bit(__IGBVF_DOWN, &adapter->state))) { |
843 | netif_wake_queue(dev: netdev); |
844 | ++adapter->restart_queue; |
845 | } |
846 | } |
847 | |
848 | netdev->stats.tx_bytes += total_bytes; |
849 | netdev->stats.tx_packets += total_packets; |
850 | return count < tx_ring->count; |
851 | } |
852 | |
853 | static irqreturn_t igbvf_msix_other(int irq, void *data) |
854 | { |
855 | struct net_device *netdev = data; |
856 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
857 | struct e1000_hw *hw = &adapter->hw; |
858 | |
859 | adapter->int_counter1++; |
860 | |
861 | hw->mac.get_link_status = 1; |
862 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) |
863 | mod_timer(timer: &adapter->watchdog_timer, expires: jiffies + 1); |
864 | |
865 | ew32(EIMS, adapter->eims_other); |
866 | |
867 | return IRQ_HANDLED; |
868 | } |
869 | |
870 | static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) |
871 | { |
872 | struct net_device *netdev = data; |
873 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
874 | struct e1000_hw *hw = &adapter->hw; |
875 | struct igbvf_ring *tx_ring = adapter->tx_ring; |
876 | |
877 | if (tx_ring->set_itr) { |
878 | writel(val: tx_ring->itr_val, |
879 | addr: adapter->hw.hw_addr + tx_ring->itr_register); |
880 | adapter->tx_ring->set_itr = 0; |
881 | } |
882 | |
883 | adapter->total_tx_bytes = 0; |
884 | adapter->total_tx_packets = 0; |
885 | |
886 | /* auto mask will automatically re-enable the interrupt when we write |
887 | * EICS |
888 | */ |
889 | if (!igbvf_clean_tx_irq(tx_ring)) |
890 | /* Ring was not completely cleaned, so fire another interrupt */ |
891 | ew32(EICS, tx_ring->eims_value); |
892 | else |
893 | ew32(EIMS, tx_ring->eims_value); |
894 | |
895 | return IRQ_HANDLED; |
896 | } |
897 | |
898 | static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) |
899 | { |
900 | struct net_device *netdev = data; |
901 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
902 | |
903 | adapter->int_counter0++; |
904 | |
905 | /* Write the ITR value calculated at the end of the |
906 | * previous interrupt. |
907 | */ |
908 | if (adapter->rx_ring->set_itr) { |
909 | writel(val: adapter->rx_ring->itr_val, |
910 | addr: adapter->hw.hw_addr + adapter->rx_ring->itr_register); |
911 | adapter->rx_ring->set_itr = 0; |
912 | } |
913 | |
914 | if (napi_schedule_prep(n: &adapter->rx_ring->napi)) { |
915 | adapter->total_rx_bytes = 0; |
916 | adapter->total_rx_packets = 0; |
917 | __napi_schedule(n: &adapter->rx_ring->napi); |
918 | } |
919 | |
920 | return IRQ_HANDLED; |
921 | } |
922 | |
923 | #define IGBVF_NO_QUEUE -1 |
924 | |
925 | static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, |
926 | int tx_queue, int msix_vector) |
927 | { |
928 | struct e1000_hw *hw = &adapter->hw; |
929 | u32 ivar, index; |
930 | |
931 | /* 82576 uses a table-based method for assigning vectors. |
932 | * Each queue has a single entry in the table to which we write |
933 | * a vector number along with a "valid" bit. Sadly, the layout |
934 | * of the table is somewhat counterintuitive. |
935 | */ |
936 | if (rx_queue > IGBVF_NO_QUEUE) { |
937 | index = (rx_queue >> 1); |
938 | ivar = array_er32(IVAR0, index); |
939 | if (rx_queue & 0x1) { |
940 | /* vector goes into third byte of register */ |
941 | ivar = ivar & 0xFF00FFFF; |
942 | ivar |= (msix_vector | E1000_IVAR_VALID) << 16; |
943 | } else { |
944 | /* vector goes into low byte of register */ |
945 | ivar = ivar & 0xFFFFFF00; |
946 | ivar |= msix_vector | E1000_IVAR_VALID; |
947 | } |
948 | adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector); |
949 | array_ew32(IVAR0, index, ivar); |
950 | } |
951 | if (tx_queue > IGBVF_NO_QUEUE) { |
952 | index = (tx_queue >> 1); |
953 | ivar = array_er32(IVAR0, index); |
954 | if (tx_queue & 0x1) { |
955 | /* vector goes into high byte of register */ |
956 | ivar = ivar & 0x00FFFFFF; |
957 | ivar |= (msix_vector | E1000_IVAR_VALID) << 24; |
958 | } else { |
959 | /* vector goes into second byte of register */ |
960 | ivar = ivar & 0xFFFF00FF; |
961 | ivar |= (msix_vector | E1000_IVAR_VALID) << 8; |
962 | } |
963 | adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector); |
964 | array_ew32(IVAR0, index, ivar); |
965 | } |
966 | } |
967 | |
968 | /** |
969 | * igbvf_configure_msix - Configure MSI-X hardware |
970 | * @adapter: board private structure |
971 | * |
972 | * igbvf_configure_msix sets up the hardware to properly |
973 | * generate MSI-X interrupts. |
974 | **/ |
975 | static void igbvf_configure_msix(struct igbvf_adapter *adapter) |
976 | { |
977 | u32 tmp; |
978 | struct e1000_hw *hw = &adapter->hw; |
979 | struct igbvf_ring *tx_ring = adapter->tx_ring; |
980 | struct igbvf_ring *rx_ring = adapter->rx_ring; |
981 | int vector = 0; |
982 | |
983 | adapter->eims_enable_mask = 0; |
984 | |
985 | igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, tx_queue: 0, msix_vector: vector++); |
986 | adapter->eims_enable_mask |= tx_ring->eims_value; |
987 | writel(val: tx_ring->itr_val, addr: hw->hw_addr + tx_ring->itr_register); |
988 | igbvf_assign_vector(adapter, rx_queue: 0, IGBVF_NO_QUEUE, msix_vector: vector++); |
989 | adapter->eims_enable_mask |= rx_ring->eims_value; |
990 | writel(val: rx_ring->itr_val, addr: hw->hw_addr + rx_ring->itr_register); |
991 | |
992 | /* set vector for other causes, i.e. link changes */ |
993 | |
994 | tmp = (vector++ | E1000_IVAR_VALID); |
995 | |
996 | ew32(IVAR_MISC, tmp); |
997 | |
998 | adapter->eims_enable_mask = GENMASK(vector - 1, 0); |
999 | adapter->eims_other = BIT(vector - 1); |
1000 | e1e_flush(); |
1001 | } |
1002 | |
1003 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) |
1004 | { |
1005 | if (adapter->msix_entries) { |
1006 | pci_disable_msix(dev: adapter->pdev); |
1007 | kfree(objp: adapter->msix_entries); |
1008 | adapter->msix_entries = NULL; |
1009 | } |
1010 | } |
1011 | |
1012 | /** |
1013 | * igbvf_set_interrupt_capability - set MSI or MSI-X if supported |
1014 | * @adapter: board private structure |
1015 | * |
1016 | * Attempt to configure interrupts using the best available |
1017 | * capabilities of the hardware and kernel. |
1018 | **/ |
1019 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) |
1020 | { |
1021 | int err = -ENOMEM; |
1022 | int i; |
1023 | |
1024 | /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */ |
1025 | adapter->msix_entries = kcalloc(n: 3, size: sizeof(struct msix_entry), |
1026 | GFP_KERNEL); |
1027 | if (adapter->msix_entries) { |
1028 | for (i = 0; i < 3; i++) |
1029 | adapter->msix_entries[i].entry = i; |
1030 | |
1031 | err = pci_enable_msix_range(dev: adapter->pdev, |
1032 | entries: adapter->msix_entries, minvec: 3, maxvec: 3); |
1033 | } |
1034 | |
1035 | if (err < 0) { |
1036 | /* MSI-X failed */ |
1037 | dev_err(&adapter->pdev->dev, |
1038 | "Failed to initialize MSI-X interrupts.\n" ); |
1039 | igbvf_reset_interrupt_capability(adapter); |
1040 | } |
1041 | } |
1042 | |
1043 | /** |
1044 | * igbvf_request_msix - Initialize MSI-X interrupts |
1045 | * @adapter: board private structure |
1046 | * |
1047 | * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the |
1048 | * kernel. |
1049 | **/ |
1050 | static int igbvf_request_msix(struct igbvf_adapter *adapter) |
1051 | { |
1052 | struct net_device *netdev = adapter->netdev; |
1053 | int err = 0, vector = 0; |
1054 | |
1055 | if (strlen(netdev->name) < (IFNAMSIZ - 5)) { |
1056 | sprintf(buf: adapter->tx_ring->name, fmt: "%s-tx-0" , netdev->name); |
1057 | sprintf(buf: adapter->rx_ring->name, fmt: "%s-rx-0" , netdev->name); |
1058 | } else { |
1059 | memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); |
1060 | memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); |
1061 | } |
1062 | |
1063 | err = request_irq(irq: adapter->msix_entries[vector].vector, |
1064 | handler: igbvf_intr_msix_tx, flags: 0, name: adapter->tx_ring->name, |
1065 | dev: netdev); |
1066 | if (err) |
1067 | goto out; |
1068 | |
1069 | adapter->tx_ring->itr_register = E1000_EITR(vector); |
1070 | adapter->tx_ring->itr_val = adapter->current_itr; |
1071 | vector++; |
1072 | |
1073 | err = request_irq(irq: adapter->msix_entries[vector].vector, |
1074 | handler: igbvf_intr_msix_rx, flags: 0, name: adapter->rx_ring->name, |
1075 | dev: netdev); |
1076 | if (err) |
1077 | goto free_irq_tx; |
1078 | |
1079 | adapter->rx_ring->itr_register = E1000_EITR(vector); |
1080 | adapter->rx_ring->itr_val = adapter->current_itr; |
1081 | vector++; |
1082 | |
1083 | err = request_irq(irq: adapter->msix_entries[vector].vector, |
1084 | handler: igbvf_msix_other, flags: 0, name: netdev->name, dev: netdev); |
1085 | if (err) |
1086 | goto free_irq_rx; |
1087 | |
1088 | igbvf_configure_msix(adapter); |
1089 | return 0; |
1090 | free_irq_rx: |
1091 | free_irq(adapter->msix_entries[--vector].vector, netdev); |
1092 | free_irq_tx: |
1093 | free_irq(adapter->msix_entries[--vector].vector, netdev); |
1094 | out: |
1095 | return err; |
1096 | } |
1097 | |
1098 | /** |
1099 | * igbvf_alloc_queues - Allocate memory for all rings |
1100 | * @adapter: board private structure to initialize |
1101 | **/ |
1102 | static int igbvf_alloc_queues(struct igbvf_adapter *adapter) |
1103 | { |
1104 | struct net_device *netdev = adapter->netdev; |
1105 | |
1106 | adapter->tx_ring = kzalloc(size: sizeof(struct igbvf_ring), GFP_KERNEL); |
1107 | if (!adapter->tx_ring) |
1108 | return -ENOMEM; |
1109 | |
1110 | adapter->rx_ring = kzalloc(size: sizeof(struct igbvf_ring), GFP_KERNEL); |
1111 | if (!adapter->rx_ring) { |
1112 | kfree(objp: adapter->tx_ring); |
1113 | return -ENOMEM; |
1114 | } |
1115 | |
1116 | netif_napi_add(dev: netdev, napi: &adapter->rx_ring->napi, poll: igbvf_poll); |
1117 | |
1118 | return 0; |
1119 | } |
1120 | |
1121 | /** |
1122 | * igbvf_request_irq - initialize interrupts |
1123 | * @adapter: board private structure |
1124 | * |
1125 | * Attempts to configure interrupts using the best available |
1126 | * capabilities of the hardware and kernel. |
1127 | **/ |
1128 | static int igbvf_request_irq(struct igbvf_adapter *adapter) |
1129 | { |
1130 | int err = -1; |
1131 | |
1132 | /* igbvf supports msi-x only */ |
1133 | if (adapter->msix_entries) |
1134 | err = igbvf_request_msix(adapter); |
1135 | |
1136 | if (!err) |
1137 | return err; |
1138 | |
1139 | dev_err(&adapter->pdev->dev, |
1140 | "Unable to allocate interrupt, Error: %d\n" , err); |
1141 | |
1142 | return err; |
1143 | } |
1144 | |
1145 | static void igbvf_free_irq(struct igbvf_adapter *adapter) |
1146 | { |
1147 | struct net_device *netdev = adapter->netdev; |
1148 | int vector; |
1149 | |
1150 | if (adapter->msix_entries) { |
1151 | for (vector = 0; vector < 3; vector++) |
1152 | free_irq(adapter->msix_entries[vector].vector, netdev); |
1153 | } |
1154 | } |
1155 | |
1156 | /** |
1157 | * igbvf_irq_disable - Mask off interrupt generation on the NIC |
1158 | * @adapter: board private structure |
1159 | **/ |
1160 | static void igbvf_irq_disable(struct igbvf_adapter *adapter) |
1161 | { |
1162 | struct e1000_hw *hw = &adapter->hw; |
1163 | |
1164 | ew32(EIMC, ~0); |
1165 | |
1166 | if (adapter->msix_entries) |
1167 | ew32(EIAC, 0); |
1168 | } |
1169 | |
1170 | /** |
1171 | * igbvf_irq_enable - Enable default interrupt generation settings |
1172 | * @adapter: board private structure |
1173 | **/ |
1174 | static void igbvf_irq_enable(struct igbvf_adapter *adapter) |
1175 | { |
1176 | struct e1000_hw *hw = &adapter->hw; |
1177 | |
1178 | ew32(EIAC, adapter->eims_enable_mask); |
1179 | ew32(EIAM, adapter->eims_enable_mask); |
1180 | ew32(EIMS, adapter->eims_enable_mask); |
1181 | } |
1182 | |
1183 | /** |
1184 | * igbvf_poll - NAPI Rx polling callback |
1185 | * @napi: struct associated with this polling callback |
1186 | * @budget: amount of packets driver is allowed to process this poll |
1187 | **/ |
1188 | static int igbvf_poll(struct napi_struct *napi, int budget) |
1189 | { |
1190 | struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); |
1191 | struct igbvf_adapter *adapter = rx_ring->adapter; |
1192 | struct e1000_hw *hw = &adapter->hw; |
1193 | int work_done = 0; |
1194 | |
1195 | igbvf_clean_rx_irq(adapter, work_done: &work_done, work_to_do: budget); |
1196 | |
1197 | if (work_done == budget) |
1198 | return budget; |
1199 | |
1200 | /* Exit the polling mode, but don't re-enable interrupts if stack might |
1201 | * poll us due to busy-polling |
1202 | */ |
1203 | if (likely(napi_complete_done(napi, work_done))) { |
1204 | if (adapter->requested_itr & 3) |
1205 | igbvf_set_itr(adapter); |
1206 | |
1207 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) |
1208 | ew32(EIMS, adapter->rx_ring->eims_value); |
1209 | } |
1210 | |
1211 | return work_done; |
1212 | } |
1213 | |
1214 | /** |
1215 | * igbvf_set_rlpml - set receive large packet maximum length |
1216 | * @adapter: board private structure |
1217 | * |
1218 | * Configure the maximum size of packets that will be received |
1219 | */ |
1220 | static void igbvf_set_rlpml(struct igbvf_adapter *adapter) |
1221 | { |
1222 | int max_frame_size; |
1223 | struct e1000_hw *hw = &adapter->hw; |
1224 | |
1225 | max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE; |
1226 | |
1227 | spin_lock_bh(lock: &hw->mbx_lock); |
1228 | |
1229 | e1000_rlpml_set_vf(hw, max_frame_size); |
1230 | |
1231 | spin_unlock_bh(lock: &hw->mbx_lock); |
1232 | } |
1233 | |
1234 | static int igbvf_vlan_rx_add_vid(struct net_device *netdev, |
1235 | __be16 proto, u16 vid) |
1236 | { |
1237 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1238 | struct e1000_hw *hw = &adapter->hw; |
1239 | |
1240 | spin_lock_bh(lock: &hw->mbx_lock); |
1241 | |
1242 | if (hw->mac.ops.set_vfta(hw, vid, true)) { |
1243 | dev_warn(&adapter->pdev->dev, "Vlan id %d\n is not added" , vid); |
1244 | spin_unlock_bh(lock: &hw->mbx_lock); |
1245 | return -EINVAL; |
1246 | } |
1247 | |
1248 | spin_unlock_bh(lock: &hw->mbx_lock); |
1249 | |
1250 | set_bit(nr: vid, addr: adapter->active_vlans); |
1251 | return 0; |
1252 | } |
1253 | |
1254 | static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, |
1255 | __be16 proto, u16 vid) |
1256 | { |
1257 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1258 | struct e1000_hw *hw = &adapter->hw; |
1259 | |
1260 | spin_lock_bh(lock: &hw->mbx_lock); |
1261 | |
1262 | if (hw->mac.ops.set_vfta(hw, vid, false)) { |
1263 | dev_err(&adapter->pdev->dev, |
1264 | "Failed to remove vlan id %d\n" , vid); |
1265 | spin_unlock_bh(lock: &hw->mbx_lock); |
1266 | return -EINVAL; |
1267 | } |
1268 | |
1269 | spin_unlock_bh(lock: &hw->mbx_lock); |
1270 | |
1271 | clear_bit(nr: vid, addr: adapter->active_vlans); |
1272 | return 0; |
1273 | } |
1274 | |
1275 | static void igbvf_restore_vlan(struct igbvf_adapter *adapter) |
1276 | { |
1277 | u16 vid; |
1278 | |
1279 | for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
1280 | igbvf_vlan_rx_add_vid(netdev: adapter->netdev, htons(ETH_P_8021Q), vid); |
1281 | } |
1282 | |
1283 | /** |
1284 | * igbvf_configure_tx - Configure Transmit Unit after Reset |
1285 | * @adapter: board private structure |
1286 | * |
1287 | * Configure the Tx unit of the MAC after a reset. |
1288 | **/ |
1289 | static void igbvf_configure_tx(struct igbvf_adapter *adapter) |
1290 | { |
1291 | struct e1000_hw *hw = &adapter->hw; |
1292 | struct igbvf_ring *tx_ring = adapter->tx_ring; |
1293 | u64 tdba; |
1294 | u32 txdctl, dca_txctrl; |
1295 | |
1296 | /* disable transmits */ |
1297 | txdctl = er32(TXDCTL(0)); |
1298 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); |
1299 | e1e_flush(); |
1300 | msleep(msecs: 10); |
1301 | |
1302 | /* Setup the HW Tx Head and Tail descriptor pointers */ |
1303 | ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); |
1304 | tdba = tx_ring->dma; |
1305 | ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); |
1306 | ew32(TDBAH(0), (tdba >> 32)); |
1307 | ew32(TDH(0), 0); |
1308 | ew32(TDT(0), 0); |
1309 | tx_ring->head = E1000_TDH(0); |
1310 | tx_ring->tail = E1000_TDT(0); |
1311 | |
1312 | /* Turn off Relaxed Ordering on head write-backs. The writebacks |
1313 | * MUST be delivered in order or it will completely screw up |
1314 | * our bookkeeping. |
1315 | */ |
1316 | dca_txctrl = er32(DCA_TXCTRL(0)); |
1317 | dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; |
1318 | ew32(DCA_TXCTRL(0), dca_txctrl); |
1319 | |
1320 | /* enable transmits */ |
1321 | txdctl |= E1000_TXDCTL_QUEUE_ENABLE; |
1322 | ew32(TXDCTL(0), txdctl); |
1323 | |
1324 | /* Setup Transmit Descriptor Settings for eop descriptor */ |
1325 | adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; |
1326 | |
1327 | /* enable Report Status bit */ |
1328 | adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; |
1329 | } |
1330 | |
1331 | /** |
1332 | * igbvf_setup_srrctl - configure the receive control registers |
1333 | * @adapter: Board private structure |
1334 | **/ |
1335 | static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) |
1336 | { |
1337 | struct e1000_hw *hw = &adapter->hw; |
1338 | u32 srrctl = 0; |
1339 | |
1340 | srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | |
1341 | E1000_SRRCTL_BSIZEHDR_MASK | |
1342 | E1000_SRRCTL_BSIZEPKT_MASK); |
1343 | |
1344 | /* Enable queue drop to avoid head of line blocking */ |
1345 | srrctl |= E1000_SRRCTL_DROP_EN; |
1346 | |
1347 | /* Setup buffer sizes */ |
1348 | srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> |
1349 | E1000_SRRCTL_BSIZEPKT_SHIFT; |
1350 | |
1351 | if (adapter->rx_buffer_len < 2048) { |
1352 | adapter->rx_ps_hdr_size = 0; |
1353 | srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; |
1354 | } else { |
1355 | adapter->rx_ps_hdr_size = 128; |
1356 | srrctl |= adapter->rx_ps_hdr_size << |
1357 | E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; |
1358 | srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; |
1359 | } |
1360 | |
1361 | ew32(SRRCTL(0), srrctl); |
1362 | } |
1363 | |
1364 | /** |
1365 | * igbvf_configure_rx - Configure Receive Unit after Reset |
1366 | * @adapter: board private structure |
1367 | * |
1368 | * Configure the Rx unit of the MAC after a reset. |
1369 | **/ |
1370 | static void igbvf_configure_rx(struct igbvf_adapter *adapter) |
1371 | { |
1372 | struct e1000_hw *hw = &adapter->hw; |
1373 | struct igbvf_ring *rx_ring = adapter->rx_ring; |
1374 | u64 rdba; |
1375 | u32 rxdctl; |
1376 | |
1377 | /* disable receives */ |
1378 | rxdctl = er32(RXDCTL(0)); |
1379 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); |
1380 | e1e_flush(); |
1381 | msleep(msecs: 10); |
1382 | |
1383 | /* Setup the HW Rx Head and Tail Descriptor Pointers and |
1384 | * the Base and Length of the Rx Descriptor Ring |
1385 | */ |
1386 | rdba = rx_ring->dma; |
1387 | ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); |
1388 | ew32(RDBAH(0), (rdba >> 32)); |
1389 | ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); |
1390 | rx_ring->head = E1000_RDH(0); |
1391 | rx_ring->tail = E1000_RDT(0); |
1392 | ew32(RDH(0), 0); |
1393 | ew32(RDT(0), 0); |
1394 | |
1395 | rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; |
1396 | rxdctl &= 0xFFF00000; |
1397 | rxdctl |= IGBVF_RX_PTHRESH; |
1398 | rxdctl |= IGBVF_RX_HTHRESH << 8; |
1399 | rxdctl |= IGBVF_RX_WTHRESH << 16; |
1400 | |
1401 | igbvf_set_rlpml(adapter); |
1402 | |
1403 | /* enable receives */ |
1404 | ew32(RXDCTL(0), rxdctl); |
1405 | } |
1406 | |
1407 | /** |
1408 | * igbvf_set_multi - Multicast and Promiscuous mode set |
1409 | * @netdev: network interface device structure |
1410 | * |
1411 | * The set_multi entry point is called whenever the multicast address |
1412 | * list or the network interface flags are updated. This routine is |
1413 | * responsible for configuring the hardware for proper multicast, |
1414 | * promiscuous mode, and all-multi behavior. |
1415 | **/ |
1416 | static void igbvf_set_multi(struct net_device *netdev) |
1417 | { |
1418 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1419 | struct e1000_hw *hw = &adapter->hw; |
1420 | struct netdev_hw_addr *ha; |
1421 | u8 *mta_list = NULL; |
1422 | int i; |
1423 | |
1424 | if (!netdev_mc_empty(netdev)) { |
1425 | mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN, |
1426 | GFP_ATOMIC); |
1427 | if (!mta_list) |
1428 | return; |
1429 | } |
1430 | |
1431 | /* prepare a packed array of only addresses. */ |
1432 | i = 0; |
1433 | netdev_for_each_mc_addr(ha, netdev) |
1434 | memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); |
1435 | |
1436 | spin_lock_bh(lock: &hw->mbx_lock); |
1437 | |
1438 | hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); |
1439 | |
1440 | spin_unlock_bh(lock: &hw->mbx_lock); |
1441 | kfree(objp: mta_list); |
1442 | } |
1443 | |
1444 | /** |
1445 | * igbvf_set_uni - Configure unicast MAC filters |
1446 | * @netdev: network interface device structure |
1447 | * |
1448 | * This routine is responsible for configuring the hardware for proper |
1449 | * unicast filters. |
1450 | **/ |
1451 | static int igbvf_set_uni(struct net_device *netdev) |
1452 | { |
1453 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1454 | struct e1000_hw *hw = &adapter->hw; |
1455 | |
1456 | if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) { |
1457 | pr_err("Too many unicast filters - No Space\n" ); |
1458 | return -ENOSPC; |
1459 | } |
1460 | |
1461 | spin_lock_bh(lock: &hw->mbx_lock); |
1462 | |
1463 | /* Clear all unicast MAC filters */ |
1464 | hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL); |
1465 | |
1466 | spin_unlock_bh(lock: &hw->mbx_lock); |
1467 | |
1468 | if (!netdev_uc_empty(netdev)) { |
1469 | struct netdev_hw_addr *ha; |
1470 | |
1471 | /* Add MAC filters one by one */ |
1472 | netdev_for_each_uc_addr(ha, netdev) { |
1473 | spin_lock_bh(lock: &hw->mbx_lock); |
1474 | |
1475 | hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD, |
1476 | ha->addr); |
1477 | |
1478 | spin_unlock_bh(lock: &hw->mbx_lock); |
1479 | udelay(200); |
1480 | } |
1481 | } |
1482 | |
1483 | return 0; |
1484 | } |
1485 | |
1486 | static void igbvf_set_rx_mode(struct net_device *netdev) |
1487 | { |
1488 | igbvf_set_multi(netdev); |
1489 | igbvf_set_uni(netdev); |
1490 | } |
1491 | |
1492 | /** |
1493 | * igbvf_configure - configure the hardware for Rx and Tx |
1494 | * @adapter: private board structure |
1495 | **/ |
1496 | static void igbvf_configure(struct igbvf_adapter *adapter) |
1497 | { |
1498 | igbvf_set_rx_mode(netdev: adapter->netdev); |
1499 | |
1500 | igbvf_restore_vlan(adapter); |
1501 | |
1502 | igbvf_configure_tx(adapter); |
1503 | igbvf_setup_srrctl(adapter); |
1504 | igbvf_configure_rx(adapter); |
1505 | igbvf_alloc_rx_buffers(rx_ring: adapter->rx_ring, |
1506 | cleaned_count: igbvf_desc_unused(ring: adapter->rx_ring)); |
1507 | } |
1508 | |
1509 | /* igbvf_reset - bring the hardware into a known good state |
1510 | * @adapter: private board structure |
1511 | * |
1512 | * This function boots the hardware and enables some settings that |
1513 | * require a configuration cycle of the hardware - those cannot be |
1514 | * set/changed during runtime. After reset the device needs to be |
1515 | * properly configured for Rx, Tx etc. |
1516 | */ |
1517 | static void igbvf_reset(struct igbvf_adapter *adapter) |
1518 | { |
1519 | struct e1000_mac_info *mac = &adapter->hw.mac; |
1520 | struct net_device *netdev = adapter->netdev; |
1521 | struct e1000_hw *hw = &adapter->hw; |
1522 | |
1523 | spin_lock_bh(lock: &hw->mbx_lock); |
1524 | |
1525 | /* Allow time for pending master requests to run */ |
1526 | if (mac->ops.reset_hw(hw)) |
1527 | dev_info(&adapter->pdev->dev, "PF still resetting\n" ); |
1528 | |
1529 | mac->ops.init_hw(hw); |
1530 | |
1531 | spin_unlock_bh(lock: &hw->mbx_lock); |
1532 | |
1533 | if (is_valid_ether_addr(addr: adapter->hw.mac.addr)) { |
1534 | eth_hw_addr_set(dev: netdev, addr: adapter->hw.mac.addr); |
1535 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, |
1536 | netdev->addr_len); |
1537 | } |
1538 | |
1539 | adapter->last_reset = jiffies; |
1540 | } |
1541 | |
1542 | int igbvf_up(struct igbvf_adapter *adapter) |
1543 | { |
1544 | struct e1000_hw *hw = &adapter->hw; |
1545 | |
1546 | /* hardware has been reset, we need to reload some things */ |
1547 | igbvf_configure(adapter); |
1548 | |
1549 | clear_bit(nr: __IGBVF_DOWN, addr: &adapter->state); |
1550 | |
1551 | napi_enable(n: &adapter->rx_ring->napi); |
1552 | if (adapter->msix_entries) |
1553 | igbvf_configure_msix(adapter); |
1554 | |
1555 | /* Clear any pending interrupts. */ |
1556 | er32(EICR); |
1557 | igbvf_irq_enable(adapter); |
1558 | |
1559 | /* start the watchdog */ |
1560 | hw->mac.get_link_status = 1; |
1561 | mod_timer(timer: &adapter->watchdog_timer, expires: jiffies + 1); |
1562 | |
1563 | return 0; |
1564 | } |
1565 | |
1566 | void igbvf_down(struct igbvf_adapter *adapter) |
1567 | { |
1568 | struct net_device *netdev = adapter->netdev; |
1569 | struct e1000_hw *hw = &adapter->hw; |
1570 | u32 rxdctl, txdctl; |
1571 | |
1572 | /* signal that we're down so the interrupt handler does not |
1573 | * reschedule our watchdog timer |
1574 | */ |
1575 | set_bit(nr: __IGBVF_DOWN, addr: &adapter->state); |
1576 | |
1577 | /* disable receives in the hardware */ |
1578 | rxdctl = er32(RXDCTL(0)); |
1579 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); |
1580 | |
1581 | netif_carrier_off(dev: netdev); |
1582 | netif_stop_queue(dev: netdev); |
1583 | |
1584 | /* disable transmits in the hardware */ |
1585 | txdctl = er32(TXDCTL(0)); |
1586 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); |
1587 | |
1588 | /* flush both disables and wait for them to finish */ |
1589 | e1e_flush(); |
1590 | msleep(msecs: 10); |
1591 | |
1592 | napi_disable(n: &adapter->rx_ring->napi); |
1593 | |
1594 | igbvf_irq_disable(adapter); |
1595 | |
1596 | del_timer_sync(timer: &adapter->watchdog_timer); |
1597 | |
1598 | /* record the stats before reset*/ |
1599 | igbvf_update_stats(adapter); |
1600 | |
1601 | adapter->link_speed = 0; |
1602 | adapter->link_duplex = 0; |
1603 | |
1604 | igbvf_reset(adapter); |
1605 | igbvf_clean_tx_ring(tx_ring: adapter->tx_ring); |
1606 | igbvf_clean_rx_ring(rx_ring: adapter->rx_ring); |
1607 | } |
1608 | |
1609 | void igbvf_reinit_locked(struct igbvf_adapter *adapter) |
1610 | { |
1611 | might_sleep(); |
1612 | while (test_and_set_bit(nr: __IGBVF_RESETTING, addr: &adapter->state)) |
1613 | usleep_range(min: 1000, max: 2000); |
1614 | igbvf_down(adapter); |
1615 | igbvf_up(adapter); |
1616 | clear_bit(nr: __IGBVF_RESETTING, addr: &adapter->state); |
1617 | } |
1618 | |
1619 | /** |
1620 | * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) |
1621 | * @adapter: board private structure to initialize |
1622 | * |
1623 | * igbvf_sw_init initializes the Adapter private data structure. |
1624 | * Fields are initialized based on PCI device information and |
1625 | * OS network device settings (MTU size). |
1626 | **/ |
1627 | static int igbvf_sw_init(struct igbvf_adapter *adapter) |
1628 | { |
1629 | struct net_device *netdev = adapter->netdev; |
1630 | s32 rc; |
1631 | |
1632 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; |
1633 | adapter->rx_ps_hdr_size = 0; |
1634 | adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; |
1635 | adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; |
1636 | |
1637 | adapter->tx_int_delay = 8; |
1638 | adapter->tx_abs_int_delay = 32; |
1639 | adapter->rx_int_delay = 0; |
1640 | adapter->rx_abs_int_delay = 8; |
1641 | adapter->requested_itr = 3; |
1642 | adapter->current_itr = IGBVF_START_ITR; |
1643 | |
1644 | /* Set various function pointers */ |
1645 | adapter->ei->init_ops(&adapter->hw); |
1646 | |
1647 | rc = adapter->hw.mac.ops.init_params(&adapter->hw); |
1648 | if (rc) |
1649 | return rc; |
1650 | |
1651 | rc = adapter->hw.mbx.ops.init_params(&adapter->hw); |
1652 | if (rc) |
1653 | return rc; |
1654 | |
1655 | igbvf_set_interrupt_capability(adapter); |
1656 | |
1657 | if (igbvf_alloc_queues(adapter)) |
1658 | return -ENOMEM; |
1659 | |
1660 | spin_lock_init(&adapter->tx_queue_lock); |
1661 | |
1662 | /* Explicitly disable IRQ since the NIC can be in any state. */ |
1663 | igbvf_irq_disable(adapter); |
1664 | |
1665 | spin_lock_init(&adapter->stats_lock); |
1666 | spin_lock_init(&adapter->hw.mbx_lock); |
1667 | |
1668 | set_bit(nr: __IGBVF_DOWN, addr: &adapter->state); |
1669 | return 0; |
1670 | } |
1671 | |
1672 | static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) |
1673 | { |
1674 | struct e1000_hw *hw = &adapter->hw; |
1675 | |
1676 | adapter->stats.last_gprc = er32(VFGPRC); |
1677 | adapter->stats.last_gorc = er32(VFGORC); |
1678 | adapter->stats.last_gptc = er32(VFGPTC); |
1679 | adapter->stats.last_gotc = er32(VFGOTC); |
1680 | adapter->stats.last_mprc = er32(VFMPRC); |
1681 | adapter->stats.last_gotlbc = er32(VFGOTLBC); |
1682 | adapter->stats.last_gptlbc = er32(VFGPTLBC); |
1683 | adapter->stats.last_gorlbc = er32(VFGORLBC); |
1684 | adapter->stats.last_gprlbc = er32(VFGPRLBC); |
1685 | |
1686 | adapter->stats.base_gprc = er32(VFGPRC); |
1687 | adapter->stats.base_gorc = er32(VFGORC); |
1688 | adapter->stats.base_gptc = er32(VFGPTC); |
1689 | adapter->stats.base_gotc = er32(VFGOTC); |
1690 | adapter->stats.base_mprc = er32(VFMPRC); |
1691 | adapter->stats.base_gotlbc = er32(VFGOTLBC); |
1692 | adapter->stats.base_gptlbc = er32(VFGPTLBC); |
1693 | adapter->stats.base_gorlbc = er32(VFGORLBC); |
1694 | adapter->stats.base_gprlbc = er32(VFGPRLBC); |
1695 | } |
1696 | |
1697 | /** |
1698 | * igbvf_open - Called when a network interface is made active |
1699 | * @netdev: network interface device structure |
1700 | * |
1701 | * Returns 0 on success, negative value on failure |
1702 | * |
1703 | * The open entry point is called when a network interface is made |
1704 | * active by the system (IFF_UP). At this point all resources needed |
1705 | * for transmit and receive operations are allocated, the interrupt |
1706 | * handler is registered with the OS, the watchdog timer is started, |
1707 | * and the stack is notified that the interface is ready. |
1708 | **/ |
1709 | static int igbvf_open(struct net_device *netdev) |
1710 | { |
1711 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1712 | struct e1000_hw *hw = &adapter->hw; |
1713 | int err; |
1714 | |
1715 | /* disallow open during test */ |
1716 | if (test_bit(__IGBVF_TESTING, &adapter->state)) |
1717 | return -EBUSY; |
1718 | |
1719 | /* allocate transmit descriptors */ |
1720 | err = igbvf_setup_tx_resources(adapter, tx_ring: adapter->tx_ring); |
1721 | if (err) |
1722 | goto err_setup_tx; |
1723 | |
1724 | /* allocate receive descriptors */ |
1725 | err = igbvf_setup_rx_resources(adapter, rx_ring: adapter->rx_ring); |
1726 | if (err) |
1727 | goto err_setup_rx; |
1728 | |
1729 | /* before we allocate an interrupt, we must be ready to handle it. |
1730 | * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt |
1731 | * as soon as we call pci_request_irq, so we have to setup our |
1732 | * clean_rx handler before we do so. |
1733 | */ |
1734 | igbvf_configure(adapter); |
1735 | |
1736 | err = igbvf_request_irq(adapter); |
1737 | if (err) |
1738 | goto err_req_irq; |
1739 | |
1740 | /* From here on the code is the same as igbvf_up() */ |
1741 | clear_bit(nr: __IGBVF_DOWN, addr: &adapter->state); |
1742 | |
1743 | napi_enable(n: &adapter->rx_ring->napi); |
1744 | |
1745 | /* clear any pending interrupts */ |
1746 | er32(EICR); |
1747 | |
1748 | igbvf_irq_enable(adapter); |
1749 | |
1750 | /* start the watchdog */ |
1751 | hw->mac.get_link_status = 1; |
1752 | mod_timer(timer: &adapter->watchdog_timer, expires: jiffies + 1); |
1753 | |
1754 | return 0; |
1755 | |
1756 | err_req_irq: |
1757 | igbvf_free_rx_resources(rx_ring: adapter->rx_ring); |
1758 | err_setup_rx: |
1759 | igbvf_free_tx_resources(tx_ring: adapter->tx_ring); |
1760 | err_setup_tx: |
1761 | igbvf_reset(adapter); |
1762 | |
1763 | return err; |
1764 | } |
1765 | |
1766 | /** |
1767 | * igbvf_close - Disables a network interface |
1768 | * @netdev: network interface device structure |
1769 | * |
1770 | * Returns 0, this is not allowed to fail |
1771 | * |
1772 | * The close entry point is called when an interface is de-activated |
1773 | * by the OS. The hardware is still under the drivers control, but |
1774 | * needs to be disabled. A global MAC reset is issued to stop the |
1775 | * hardware, and all transmit and receive resources are freed. |
1776 | **/ |
1777 | static int igbvf_close(struct net_device *netdev) |
1778 | { |
1779 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1780 | |
1781 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); |
1782 | igbvf_down(adapter); |
1783 | |
1784 | igbvf_free_irq(adapter); |
1785 | |
1786 | igbvf_free_tx_resources(tx_ring: adapter->tx_ring); |
1787 | igbvf_free_rx_resources(rx_ring: adapter->rx_ring); |
1788 | |
1789 | return 0; |
1790 | } |
1791 | |
1792 | /** |
1793 | * igbvf_set_mac - Change the Ethernet Address of the NIC |
1794 | * @netdev: network interface device structure |
1795 | * @p: pointer to an address structure |
1796 | * |
1797 | * Returns 0 on success, negative on failure |
1798 | **/ |
1799 | static int igbvf_set_mac(struct net_device *netdev, void *p) |
1800 | { |
1801 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
1802 | struct e1000_hw *hw = &adapter->hw; |
1803 | struct sockaddr *addr = p; |
1804 | |
1805 | if (!is_valid_ether_addr(addr: addr->sa_data)) |
1806 | return -EADDRNOTAVAIL; |
1807 | |
1808 | memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); |
1809 | |
1810 | spin_lock_bh(lock: &hw->mbx_lock); |
1811 | |
1812 | hw->mac.ops.rar_set(hw, hw->mac.addr, 0); |
1813 | |
1814 | spin_unlock_bh(lock: &hw->mbx_lock); |
1815 | |
1816 | if (!ether_addr_equal(addr1: addr->sa_data, addr2: hw->mac.addr)) |
1817 | return -EADDRNOTAVAIL; |
1818 | |
1819 | eth_hw_addr_set(dev: netdev, addr: addr->sa_data); |
1820 | |
1821 | return 0; |
1822 | } |
1823 | |
1824 | #define UPDATE_VF_COUNTER(reg, name) \ |
1825 | { \ |
1826 | u32 current_counter = er32(reg); \ |
1827 | if (current_counter < adapter->stats.last_##name) \ |
1828 | adapter->stats.name += 0x100000000LL; \ |
1829 | adapter->stats.last_##name = current_counter; \ |
1830 | adapter->stats.name &= 0xFFFFFFFF00000000LL; \ |
1831 | adapter->stats.name |= current_counter; \ |
1832 | } |
1833 | |
1834 | /** |
1835 | * igbvf_update_stats - Update the board statistics counters |
1836 | * @adapter: board private structure |
1837 | **/ |
1838 | void igbvf_update_stats(struct igbvf_adapter *adapter) |
1839 | { |
1840 | struct e1000_hw *hw = &adapter->hw; |
1841 | struct pci_dev *pdev = adapter->pdev; |
1842 | |
1843 | /* Prevent stats update while adapter is being reset, link is down |
1844 | * or if the pci connection is down. |
1845 | */ |
1846 | if (adapter->link_speed == 0) |
1847 | return; |
1848 | |
1849 | if (test_bit(__IGBVF_RESETTING, &adapter->state)) |
1850 | return; |
1851 | |
1852 | if (pci_channel_offline(pdev)) |
1853 | return; |
1854 | |
1855 | UPDATE_VF_COUNTER(VFGPRC, gprc); |
1856 | UPDATE_VF_COUNTER(VFGORC, gorc); |
1857 | UPDATE_VF_COUNTER(VFGPTC, gptc); |
1858 | UPDATE_VF_COUNTER(VFGOTC, gotc); |
1859 | UPDATE_VF_COUNTER(VFMPRC, mprc); |
1860 | UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); |
1861 | UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); |
1862 | UPDATE_VF_COUNTER(VFGORLBC, gorlbc); |
1863 | UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); |
1864 | |
1865 | /* Fill out the OS statistics structure */ |
1866 | adapter->netdev->stats.multicast = adapter->stats.mprc; |
1867 | } |
1868 | |
1869 | static void igbvf_print_link_info(struct igbvf_adapter *adapter) |
1870 | { |
1871 | dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n" , |
1872 | adapter->link_speed, |
1873 | adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half" ); |
1874 | } |
1875 | |
1876 | static bool igbvf_has_link(struct igbvf_adapter *adapter) |
1877 | { |
1878 | struct e1000_hw *hw = &adapter->hw; |
1879 | s32 ret_val = E1000_SUCCESS; |
1880 | bool link_active; |
1881 | |
1882 | /* If interface is down, stay link down */ |
1883 | if (test_bit(__IGBVF_DOWN, &adapter->state)) |
1884 | return false; |
1885 | |
1886 | spin_lock_bh(lock: &hw->mbx_lock); |
1887 | |
1888 | ret_val = hw->mac.ops.check_for_link(hw); |
1889 | |
1890 | spin_unlock_bh(lock: &hw->mbx_lock); |
1891 | |
1892 | link_active = !hw->mac.get_link_status; |
1893 | |
1894 | /* if check for link returns error we will need to reset */ |
1895 | if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) |
1896 | schedule_work(work: &adapter->reset_task); |
1897 | |
1898 | return link_active; |
1899 | } |
1900 | |
1901 | /** |
1902 | * igbvf_watchdog - Timer Call-back |
1903 | * @t: timer list pointer containing private struct |
1904 | **/ |
1905 | static void igbvf_watchdog(struct timer_list *t) |
1906 | { |
1907 | struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer); |
1908 | |
1909 | /* Do the rest outside of interrupt context */ |
1910 | schedule_work(work: &adapter->watchdog_task); |
1911 | } |
1912 | |
1913 | static void igbvf_watchdog_task(struct work_struct *work) |
1914 | { |
1915 | struct igbvf_adapter *adapter = container_of(work, |
1916 | struct igbvf_adapter, |
1917 | watchdog_task); |
1918 | struct net_device *netdev = adapter->netdev; |
1919 | struct e1000_mac_info *mac = &adapter->hw.mac; |
1920 | struct igbvf_ring *tx_ring = adapter->tx_ring; |
1921 | struct e1000_hw *hw = &adapter->hw; |
1922 | u32 link; |
1923 | int tx_pending = 0; |
1924 | |
1925 | link = igbvf_has_link(adapter); |
1926 | |
1927 | if (link) { |
1928 | if (!netif_carrier_ok(dev: netdev)) { |
1929 | mac->ops.get_link_up_info(&adapter->hw, |
1930 | &adapter->link_speed, |
1931 | &adapter->link_duplex); |
1932 | igbvf_print_link_info(adapter); |
1933 | |
1934 | netif_carrier_on(dev: netdev); |
1935 | netif_wake_queue(dev: netdev); |
1936 | } |
1937 | } else { |
1938 | if (netif_carrier_ok(dev: netdev)) { |
1939 | adapter->link_speed = 0; |
1940 | adapter->link_duplex = 0; |
1941 | dev_info(&adapter->pdev->dev, "Link is Down\n" ); |
1942 | netif_carrier_off(dev: netdev); |
1943 | netif_stop_queue(dev: netdev); |
1944 | } |
1945 | } |
1946 | |
1947 | if (netif_carrier_ok(dev: netdev)) { |
1948 | igbvf_update_stats(adapter); |
1949 | } else { |
1950 | tx_pending = (igbvf_desc_unused(ring: tx_ring) + 1 < |
1951 | tx_ring->count); |
1952 | if (tx_pending) { |
1953 | /* We've lost link, so the controller stops DMA, |
1954 | * but we've got queued Tx work that's never going |
1955 | * to get done, so reset controller to flush Tx. |
1956 | * (Do the reset outside of interrupt context). |
1957 | */ |
1958 | adapter->tx_timeout_count++; |
1959 | schedule_work(work: &adapter->reset_task); |
1960 | } |
1961 | } |
1962 | |
1963 | /* Cause software interrupt to ensure Rx ring is cleaned */ |
1964 | ew32(EICS, adapter->rx_ring->eims_value); |
1965 | |
1966 | /* Reset the timer */ |
1967 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) |
1968 | mod_timer(timer: &adapter->watchdog_timer, |
1969 | expires: round_jiffies(j: jiffies + (2 * HZ))); |
1970 | } |
1971 | |
1972 | #define IGBVF_TX_FLAGS_CSUM 0x00000001 |
1973 | #define IGBVF_TX_FLAGS_VLAN 0x00000002 |
1974 | #define IGBVF_TX_FLAGS_TSO 0x00000004 |
1975 | #define IGBVF_TX_FLAGS_IPV4 0x00000008 |
1976 | #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 |
1977 | #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 |
1978 | |
1979 | static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens, |
1980 | u32 type_tucmd, u32 mss_l4len_idx) |
1981 | { |
1982 | struct e1000_adv_tx_context_desc *context_desc; |
1983 | struct igbvf_buffer *buffer_info; |
1984 | u16 i = tx_ring->next_to_use; |
1985 | |
1986 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); |
1987 | buffer_info = &tx_ring->buffer_info[i]; |
1988 | |
1989 | i++; |
1990 | tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; |
1991 | |
1992 | /* set bits to identify this as an advanced context descriptor */ |
1993 | type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT; |
1994 | |
1995 | context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); |
1996 | context_desc->seqnum_seed = 0; |
1997 | context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd); |
1998 | context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); |
1999 | |
2000 | buffer_info->time_stamp = jiffies; |
2001 | buffer_info->dma = 0; |
2002 | } |
2003 | |
2004 | static int igbvf_tso(struct igbvf_ring *tx_ring, |
2005 | struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) |
2006 | { |
2007 | u32 vlan_macip_lens, type_tucmd, mss_l4len_idx; |
2008 | union { |
2009 | struct iphdr *v4; |
2010 | struct ipv6hdr *v6; |
2011 | unsigned char *hdr; |
2012 | } ip; |
2013 | union { |
2014 | struct tcphdr *tcp; |
2015 | unsigned char *hdr; |
2016 | } l4; |
2017 | u32 paylen, l4_offset; |
2018 | int err; |
2019 | |
2020 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
2021 | return 0; |
2022 | |
2023 | if (!skb_is_gso(skb)) |
2024 | return 0; |
2025 | |
2026 | err = skb_cow_head(skb, headroom: 0); |
2027 | if (err < 0) |
2028 | return err; |
2029 | |
2030 | ip.hdr = skb_network_header(skb); |
2031 | l4.hdr = skb_checksum_start(skb); |
2032 | |
2033 | /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ |
2034 | type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP; |
2035 | |
2036 | /* initialize outer IP header fields */ |
2037 | if (ip.v4->version == 4) { |
2038 | unsigned char *csum_start = skb_checksum_start(skb); |
2039 | unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4); |
2040 | |
2041 | /* IP header will have to cancel out any data that |
2042 | * is not a part of the outer IP header |
2043 | */ |
2044 | ip.v4->check = csum_fold(sum: csum_partial(buff: trans_start, |
2045 | len: csum_start - trans_start, |
2046 | sum: 0)); |
2047 | type_tucmd |= E1000_ADVTXD_TUCMD_IPV4; |
2048 | |
2049 | ip.v4->tot_len = 0; |
2050 | } else { |
2051 | ip.v6->payload_len = 0; |
2052 | } |
2053 | |
2054 | /* determine offset of inner transport header */ |
2055 | l4_offset = l4.hdr - skb->data; |
2056 | |
2057 | /* compute length of segmentation header */ |
2058 | *hdr_len = (l4.tcp->doff * 4) + l4_offset; |
2059 | |
2060 | /* remove payload length from inner checksum */ |
2061 | paylen = skb->len - l4_offset; |
2062 | csum_replace_by_diff(sum: &l4.tcp->check, diff: (__force __wsum)htonl(paylen)); |
2063 | |
2064 | /* MSS L4LEN IDX */ |
2065 | mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT; |
2066 | mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT; |
2067 | |
2068 | /* VLAN MACLEN IPLEN */ |
2069 | vlan_macip_lens = l4.hdr - ip.hdr; |
2070 | vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT; |
2071 | vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK; |
2072 | |
2073 | igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx); |
2074 | |
2075 | return 1; |
2076 | } |
2077 | |
2078 | static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb, |
2079 | u32 tx_flags, __be16 protocol) |
2080 | { |
2081 | u32 vlan_macip_lens = 0; |
2082 | u32 type_tucmd = 0; |
2083 | |
2084 | if (skb->ip_summed != CHECKSUM_PARTIAL) { |
2085 | csum_failed: |
2086 | if (!(tx_flags & IGBVF_TX_FLAGS_VLAN)) |
2087 | return false; |
2088 | goto no_csum; |
2089 | } |
2090 | |
2091 | switch (skb->csum_offset) { |
2092 | case offsetof(struct tcphdr, check): |
2093 | type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP; |
2094 | fallthrough; |
2095 | case offsetof(struct udphdr, check): |
2096 | break; |
2097 | case offsetof(struct sctphdr, checksum): |
2098 | /* validate that this is actually an SCTP request */ |
2099 | if (skb_csum_is_sctp(skb)) { |
2100 | type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP; |
2101 | break; |
2102 | } |
2103 | fallthrough; |
2104 | default: |
2105 | skb_checksum_help(skb); |
2106 | goto csum_failed; |
2107 | } |
2108 | |
2109 | vlan_macip_lens = skb_checksum_start_offset(skb) - |
2110 | skb_network_offset(skb); |
2111 | no_csum: |
2112 | vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT; |
2113 | vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK; |
2114 | |
2115 | igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx: 0); |
2116 | return true; |
2117 | } |
2118 | |
2119 | static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) |
2120 | { |
2121 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2122 | |
2123 | /* there is enough descriptors then we don't need to worry */ |
2124 | if (igbvf_desc_unused(ring: adapter->tx_ring) >= size) |
2125 | return 0; |
2126 | |
2127 | netif_stop_queue(dev: netdev); |
2128 | |
2129 | /* Herbert's original patch had: |
2130 | * smp_mb__after_netif_stop_queue(); |
2131 | * but since that doesn't exist yet, just open code it. |
2132 | */ |
2133 | smp_mb(); |
2134 | |
2135 | /* We need to check again just in case room has been made available */ |
2136 | if (igbvf_desc_unused(ring: adapter->tx_ring) < size) |
2137 | return -EBUSY; |
2138 | |
2139 | netif_wake_queue(dev: netdev); |
2140 | |
2141 | ++adapter->restart_queue; |
2142 | return 0; |
2143 | } |
2144 | |
2145 | #define IGBVF_MAX_TXD_PWR 16 |
2146 | #define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR) |
2147 | |
2148 | static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, |
2149 | struct igbvf_ring *tx_ring, |
2150 | struct sk_buff *skb) |
2151 | { |
2152 | struct igbvf_buffer *buffer_info; |
2153 | struct pci_dev *pdev = adapter->pdev; |
2154 | unsigned int len = skb_headlen(skb); |
2155 | unsigned int count = 0, i; |
2156 | unsigned int f; |
2157 | |
2158 | i = tx_ring->next_to_use; |
2159 | |
2160 | buffer_info = &tx_ring->buffer_info[i]; |
2161 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); |
2162 | buffer_info->length = len; |
2163 | /* set time_stamp *before* dma to help avoid a possible race */ |
2164 | buffer_info->time_stamp = jiffies; |
2165 | buffer_info->mapped_as_page = false; |
2166 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, |
2167 | DMA_TO_DEVICE); |
2168 | if (dma_mapping_error(dev: &pdev->dev, dma_addr: buffer_info->dma)) |
2169 | goto dma_error; |
2170 | |
2171 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { |
2172 | const skb_frag_t *frag; |
2173 | |
2174 | count++; |
2175 | i++; |
2176 | if (i == tx_ring->count) |
2177 | i = 0; |
2178 | |
2179 | frag = &skb_shinfo(skb)->frags[f]; |
2180 | len = skb_frag_size(frag); |
2181 | |
2182 | buffer_info = &tx_ring->buffer_info[i]; |
2183 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); |
2184 | buffer_info->length = len; |
2185 | buffer_info->time_stamp = jiffies; |
2186 | buffer_info->mapped_as_page = true; |
2187 | buffer_info->dma = skb_frag_dma_map(dev: &pdev->dev, frag, offset: 0, size: len, |
2188 | dir: DMA_TO_DEVICE); |
2189 | if (dma_mapping_error(dev: &pdev->dev, dma_addr: buffer_info->dma)) |
2190 | goto dma_error; |
2191 | } |
2192 | |
2193 | tx_ring->buffer_info[i].skb = skb; |
2194 | |
2195 | return ++count; |
2196 | |
2197 | dma_error: |
2198 | dev_err(&pdev->dev, "TX DMA map failed\n" ); |
2199 | |
2200 | /* clear timestamp and dma mappings for failed buffer_info mapping */ |
2201 | buffer_info->dma = 0; |
2202 | buffer_info->time_stamp = 0; |
2203 | buffer_info->length = 0; |
2204 | buffer_info->mapped_as_page = false; |
2205 | if (count) |
2206 | count--; |
2207 | |
2208 | /* clear timestamp and dma mappings for remaining portion of packet */ |
2209 | while (count--) { |
2210 | if (i == 0) |
2211 | i += tx_ring->count; |
2212 | i--; |
2213 | buffer_info = &tx_ring->buffer_info[i]; |
2214 | igbvf_put_txbuf(adapter, buffer_info); |
2215 | } |
2216 | |
2217 | return 0; |
2218 | } |
2219 | |
2220 | static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, |
2221 | struct igbvf_ring *tx_ring, |
2222 | int tx_flags, int count, |
2223 | unsigned int first, u32 paylen, |
2224 | u8 hdr_len) |
2225 | { |
2226 | union e1000_adv_tx_desc *tx_desc = NULL; |
2227 | struct igbvf_buffer *buffer_info; |
2228 | u32 olinfo_status = 0, cmd_type_len; |
2229 | unsigned int i; |
2230 | |
2231 | cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | |
2232 | E1000_ADVTXD_DCMD_DEXT); |
2233 | |
2234 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) |
2235 | cmd_type_len |= E1000_ADVTXD_DCMD_VLE; |
2236 | |
2237 | if (tx_flags & IGBVF_TX_FLAGS_TSO) { |
2238 | cmd_type_len |= E1000_ADVTXD_DCMD_TSE; |
2239 | |
2240 | /* insert tcp checksum */ |
2241 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; |
2242 | |
2243 | /* insert ip checksum */ |
2244 | if (tx_flags & IGBVF_TX_FLAGS_IPV4) |
2245 | olinfo_status |= E1000_TXD_POPTS_IXSM << 8; |
2246 | |
2247 | } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { |
2248 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; |
2249 | } |
2250 | |
2251 | olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); |
2252 | |
2253 | i = tx_ring->next_to_use; |
2254 | while (count--) { |
2255 | buffer_info = &tx_ring->buffer_info[i]; |
2256 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); |
2257 | tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); |
2258 | tx_desc->read.cmd_type_len = |
2259 | cpu_to_le32(cmd_type_len | buffer_info->length); |
2260 | tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); |
2261 | i++; |
2262 | if (i == tx_ring->count) |
2263 | i = 0; |
2264 | } |
2265 | |
2266 | tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); |
2267 | /* Force memory writes to complete before letting h/w |
2268 | * know there are new descriptors to fetch. (Only |
2269 | * applicable for weak-ordered memory model archs, |
2270 | * such as IA-64). |
2271 | */ |
2272 | wmb(); |
2273 | |
2274 | tx_ring->buffer_info[first].next_to_watch = tx_desc; |
2275 | tx_ring->next_to_use = i; |
2276 | writel(val: i, addr: adapter->hw.hw_addr + tx_ring->tail); |
2277 | } |
2278 | |
2279 | static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, |
2280 | struct net_device *netdev, |
2281 | struct igbvf_ring *tx_ring) |
2282 | { |
2283 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2284 | unsigned int first, tx_flags = 0; |
2285 | u8 hdr_len = 0; |
2286 | int count = 0; |
2287 | int tso = 0; |
2288 | __be16 protocol = vlan_get_protocol(skb); |
2289 | |
2290 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { |
2291 | dev_kfree_skb_any(skb); |
2292 | return NETDEV_TX_OK; |
2293 | } |
2294 | |
2295 | if (skb->len <= 0) { |
2296 | dev_kfree_skb_any(skb); |
2297 | return NETDEV_TX_OK; |
2298 | } |
2299 | |
2300 | /* need: count + 4 desc gap to keep tail from touching |
2301 | * + 2 desc gap to keep tail from touching head, |
2302 | * + 1 desc for skb->data, |
2303 | * + 1 desc for context descriptor, |
2304 | * head, otherwise try next time |
2305 | */ |
2306 | if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { |
2307 | /* this is a hard error */ |
2308 | return NETDEV_TX_BUSY; |
2309 | } |
2310 | |
2311 | if (skb_vlan_tag_present(skb)) { |
2312 | tx_flags |= IGBVF_TX_FLAGS_VLAN; |
2313 | tx_flags |= (skb_vlan_tag_get(skb) << |
2314 | IGBVF_TX_FLAGS_VLAN_SHIFT); |
2315 | } |
2316 | |
2317 | if (protocol == htons(ETH_P_IP)) |
2318 | tx_flags |= IGBVF_TX_FLAGS_IPV4; |
2319 | |
2320 | first = tx_ring->next_to_use; |
2321 | |
2322 | tso = igbvf_tso(tx_ring, skb, tx_flags, hdr_len: &hdr_len); |
2323 | if (unlikely(tso < 0)) { |
2324 | dev_kfree_skb_any(skb); |
2325 | return NETDEV_TX_OK; |
2326 | } |
2327 | |
2328 | if (tso) |
2329 | tx_flags |= IGBVF_TX_FLAGS_TSO; |
2330 | else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) && |
2331 | (skb->ip_summed == CHECKSUM_PARTIAL)) |
2332 | tx_flags |= IGBVF_TX_FLAGS_CSUM; |
2333 | |
2334 | /* count reflects descriptors mapped, if 0 then mapping error |
2335 | * has occurred and we need to rewind the descriptor queue |
2336 | */ |
2337 | count = igbvf_tx_map_adv(adapter, tx_ring, skb); |
2338 | |
2339 | if (count) { |
2340 | igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, |
2341 | first, paylen: skb->len, hdr_len); |
2342 | /* Make sure there is space in the ring for the next send. */ |
2343 | igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); |
2344 | } else { |
2345 | dev_kfree_skb_any(skb); |
2346 | tx_ring->buffer_info[first].time_stamp = 0; |
2347 | tx_ring->next_to_use = first; |
2348 | } |
2349 | |
2350 | return NETDEV_TX_OK; |
2351 | } |
2352 | |
2353 | static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, |
2354 | struct net_device *netdev) |
2355 | { |
2356 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2357 | struct igbvf_ring *tx_ring; |
2358 | |
2359 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { |
2360 | dev_kfree_skb_any(skb); |
2361 | return NETDEV_TX_OK; |
2362 | } |
2363 | |
2364 | tx_ring = &adapter->tx_ring[0]; |
2365 | |
2366 | return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); |
2367 | } |
2368 | |
2369 | /** |
2370 | * igbvf_tx_timeout - Respond to a Tx Hang |
2371 | * @netdev: network interface device structure |
2372 | * @txqueue: queue timing out (unused) |
2373 | **/ |
2374 | static void igbvf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue) |
2375 | { |
2376 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2377 | |
2378 | /* Do the reset outside of interrupt context */ |
2379 | adapter->tx_timeout_count++; |
2380 | schedule_work(work: &adapter->reset_task); |
2381 | } |
2382 | |
2383 | static void igbvf_reset_task(struct work_struct *work) |
2384 | { |
2385 | struct igbvf_adapter *adapter; |
2386 | |
2387 | adapter = container_of(work, struct igbvf_adapter, reset_task); |
2388 | |
2389 | igbvf_reinit_locked(adapter); |
2390 | } |
2391 | |
2392 | /** |
2393 | * igbvf_change_mtu - Change the Maximum Transfer Unit |
2394 | * @netdev: network interface device structure |
2395 | * @new_mtu: new value for maximum frame size |
2396 | * |
2397 | * Returns 0 on success, negative on failure |
2398 | **/ |
2399 | static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) |
2400 | { |
2401 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2402 | int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; |
2403 | |
2404 | while (test_and_set_bit(nr: __IGBVF_RESETTING, addr: &adapter->state)) |
2405 | usleep_range(min: 1000, max: 2000); |
2406 | /* igbvf_down has a dependency on max_frame_size */ |
2407 | adapter->max_frame_size = max_frame; |
2408 | if (netif_running(dev: netdev)) |
2409 | igbvf_down(adapter); |
2410 | |
2411 | /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN |
2412 | * means we reserve 2 more, this pushes us to allocate from the next |
2413 | * larger slab size. |
2414 | * i.e. RXBUFFER_2048 --> size-4096 slab |
2415 | * However with the new *_jumbo_rx* routines, jumbo receives will use |
2416 | * fragmented skbs |
2417 | */ |
2418 | |
2419 | if (max_frame <= 1024) |
2420 | adapter->rx_buffer_len = 1024; |
2421 | else if (max_frame <= 2048) |
2422 | adapter->rx_buffer_len = 2048; |
2423 | else |
2424 | #if (PAGE_SIZE / 2) > 16384 |
2425 | adapter->rx_buffer_len = 16384; |
2426 | #else |
2427 | adapter->rx_buffer_len = PAGE_SIZE / 2; |
2428 | #endif |
2429 | |
2430 | /* adjust allocation if LPE protects us, and we aren't using SBP */ |
2431 | if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || |
2432 | (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) |
2433 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + |
2434 | ETH_FCS_LEN; |
2435 | |
2436 | netdev_dbg(netdev, "changing MTU from %d to %d\n" , |
2437 | netdev->mtu, new_mtu); |
2438 | netdev->mtu = new_mtu; |
2439 | |
2440 | if (netif_running(dev: netdev)) |
2441 | igbvf_up(adapter); |
2442 | else |
2443 | igbvf_reset(adapter); |
2444 | |
2445 | clear_bit(nr: __IGBVF_RESETTING, addr: &adapter->state); |
2446 | |
2447 | return 0; |
2448 | } |
2449 | |
2450 | static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
2451 | { |
2452 | switch (cmd) { |
2453 | default: |
2454 | return -EOPNOTSUPP; |
2455 | } |
2456 | } |
2457 | |
2458 | static int igbvf_suspend(struct device *dev_d) |
2459 | { |
2460 | struct net_device *netdev = dev_get_drvdata(dev: dev_d); |
2461 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2462 | |
2463 | netif_device_detach(dev: netdev); |
2464 | |
2465 | if (netif_running(dev: netdev)) { |
2466 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); |
2467 | igbvf_down(adapter); |
2468 | igbvf_free_irq(adapter); |
2469 | } |
2470 | |
2471 | return 0; |
2472 | } |
2473 | |
2474 | static int __maybe_unused igbvf_resume(struct device *dev_d) |
2475 | { |
2476 | struct pci_dev *pdev = to_pci_dev(dev_d); |
2477 | struct net_device *netdev = pci_get_drvdata(pdev); |
2478 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2479 | u32 err; |
2480 | |
2481 | pci_set_master(dev: pdev); |
2482 | |
2483 | if (netif_running(dev: netdev)) { |
2484 | err = igbvf_request_irq(adapter); |
2485 | if (err) |
2486 | return err; |
2487 | } |
2488 | |
2489 | igbvf_reset(adapter); |
2490 | |
2491 | if (netif_running(dev: netdev)) |
2492 | igbvf_up(adapter); |
2493 | |
2494 | netif_device_attach(dev: netdev); |
2495 | |
2496 | return 0; |
2497 | } |
2498 | |
2499 | static void igbvf_shutdown(struct pci_dev *pdev) |
2500 | { |
2501 | igbvf_suspend(dev_d: &pdev->dev); |
2502 | } |
2503 | |
2504 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2505 | /* Polling 'interrupt' - used by things like netconsole to send skbs |
2506 | * without having to re-enable interrupts. It's not called while |
2507 | * the interrupt routine is executing. |
2508 | */ |
2509 | static void igbvf_netpoll(struct net_device *netdev) |
2510 | { |
2511 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2512 | |
2513 | disable_irq(irq: adapter->pdev->irq); |
2514 | |
2515 | igbvf_clean_tx_irq(tx_ring: adapter->tx_ring); |
2516 | |
2517 | enable_irq(irq: adapter->pdev->irq); |
2518 | } |
2519 | #endif |
2520 | |
2521 | /** |
2522 | * igbvf_io_error_detected - called when PCI error is detected |
2523 | * @pdev: Pointer to PCI device |
2524 | * @state: The current pci connection state |
2525 | * |
2526 | * This function is called after a PCI bus error affecting |
2527 | * this device has been detected. |
2528 | */ |
2529 | static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, |
2530 | pci_channel_state_t state) |
2531 | { |
2532 | struct net_device *netdev = pci_get_drvdata(pdev); |
2533 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2534 | |
2535 | netif_device_detach(dev: netdev); |
2536 | |
2537 | if (state == pci_channel_io_perm_failure) |
2538 | return PCI_ERS_RESULT_DISCONNECT; |
2539 | |
2540 | if (netif_running(dev: netdev)) |
2541 | igbvf_down(adapter); |
2542 | pci_disable_device(dev: pdev); |
2543 | |
2544 | /* Request a slot reset. */ |
2545 | return PCI_ERS_RESULT_NEED_RESET; |
2546 | } |
2547 | |
2548 | /** |
2549 | * igbvf_io_slot_reset - called after the pci bus has been reset. |
2550 | * @pdev: Pointer to PCI device |
2551 | * |
2552 | * Restart the card from scratch, as if from a cold-boot. Implementation |
2553 | * resembles the first-half of the igbvf_resume routine. |
2554 | */ |
2555 | static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) |
2556 | { |
2557 | struct net_device *netdev = pci_get_drvdata(pdev); |
2558 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2559 | |
2560 | if (pci_enable_device_mem(dev: pdev)) { |
2561 | dev_err(&pdev->dev, |
2562 | "Cannot re-enable PCI device after reset.\n" ); |
2563 | return PCI_ERS_RESULT_DISCONNECT; |
2564 | } |
2565 | pci_set_master(dev: pdev); |
2566 | |
2567 | igbvf_reset(adapter); |
2568 | |
2569 | return PCI_ERS_RESULT_RECOVERED; |
2570 | } |
2571 | |
2572 | /** |
2573 | * igbvf_io_resume - called when traffic can start flowing again. |
2574 | * @pdev: Pointer to PCI device |
2575 | * |
2576 | * This callback is called when the error recovery driver tells us that |
2577 | * its OK to resume normal operation. Implementation resembles the |
2578 | * second-half of the igbvf_resume routine. |
2579 | */ |
2580 | static void igbvf_io_resume(struct pci_dev *pdev) |
2581 | { |
2582 | struct net_device *netdev = pci_get_drvdata(pdev); |
2583 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2584 | |
2585 | if (netif_running(dev: netdev)) { |
2586 | if (igbvf_up(adapter)) { |
2587 | dev_err(&pdev->dev, |
2588 | "can't bring device back up after reset\n" ); |
2589 | return; |
2590 | } |
2591 | } |
2592 | |
2593 | netif_device_attach(dev: netdev); |
2594 | } |
2595 | |
2596 | /** |
2597 | * igbvf_io_prepare - prepare device driver for PCI reset |
2598 | * @pdev: PCI device information struct |
2599 | */ |
2600 | static void igbvf_io_prepare(struct pci_dev *pdev) |
2601 | { |
2602 | struct net_device *netdev = pci_get_drvdata(pdev); |
2603 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2604 | |
2605 | while (test_and_set_bit(nr: __IGBVF_RESETTING, addr: &adapter->state)) |
2606 | usleep_range(min: 1000, max: 2000); |
2607 | igbvf_down(adapter); |
2608 | } |
2609 | |
2610 | /** |
2611 | * igbvf_io_reset_done - PCI reset done, device driver reset can begin |
2612 | * @pdev: PCI device information struct |
2613 | */ |
2614 | static void igbvf_io_reset_done(struct pci_dev *pdev) |
2615 | { |
2616 | struct net_device *netdev = pci_get_drvdata(pdev); |
2617 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2618 | |
2619 | igbvf_up(adapter); |
2620 | clear_bit(nr: __IGBVF_RESETTING, addr: &adapter->state); |
2621 | } |
2622 | |
2623 | static void igbvf_print_device_info(struct igbvf_adapter *adapter) |
2624 | { |
2625 | struct e1000_hw *hw = &adapter->hw; |
2626 | struct net_device *netdev = adapter->netdev; |
2627 | struct pci_dev *pdev = adapter->pdev; |
2628 | |
2629 | if (hw->mac.type == e1000_vfadapt_i350) |
2630 | dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n" ); |
2631 | else |
2632 | dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n" ); |
2633 | dev_info(&pdev->dev, "Address: %pM\n" , netdev->dev_addr); |
2634 | } |
2635 | |
2636 | static int igbvf_set_features(struct net_device *netdev, |
2637 | netdev_features_t features) |
2638 | { |
2639 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2640 | |
2641 | if (features & NETIF_F_RXCSUM) |
2642 | adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED; |
2643 | else |
2644 | adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED; |
2645 | |
2646 | return 0; |
2647 | } |
2648 | |
2649 | #define IGBVF_MAX_MAC_HDR_LEN 127 |
2650 | #define IGBVF_MAX_NETWORK_HDR_LEN 511 |
2651 | |
2652 | static netdev_features_t |
2653 | igbvf_features_check(struct sk_buff *skb, struct net_device *dev, |
2654 | netdev_features_t features) |
2655 | { |
2656 | unsigned int network_hdr_len, mac_hdr_len; |
2657 | |
2658 | /* Make certain the headers can be described by a context descriptor */ |
2659 | mac_hdr_len = skb_network_header(skb) - skb->data; |
2660 | if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN)) |
2661 | return features & ~(NETIF_F_HW_CSUM | |
2662 | NETIF_F_SCTP_CRC | |
2663 | NETIF_F_HW_VLAN_CTAG_TX | |
2664 | NETIF_F_TSO | |
2665 | NETIF_F_TSO6); |
2666 | |
2667 | network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb); |
2668 | if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN)) |
2669 | return features & ~(NETIF_F_HW_CSUM | |
2670 | NETIF_F_SCTP_CRC | |
2671 | NETIF_F_TSO | |
2672 | NETIF_F_TSO6); |
2673 | |
2674 | /* We can only support IPV4 TSO in tunnels if we can mangle the |
2675 | * inner IP ID field, so strip TSO if MANGLEID is not supported. |
2676 | */ |
2677 | if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID)) |
2678 | features &= ~NETIF_F_TSO; |
2679 | |
2680 | return features; |
2681 | } |
2682 | |
2683 | static const struct net_device_ops igbvf_netdev_ops = { |
2684 | .ndo_open = igbvf_open, |
2685 | .ndo_stop = igbvf_close, |
2686 | .ndo_start_xmit = igbvf_xmit_frame, |
2687 | .ndo_set_rx_mode = igbvf_set_rx_mode, |
2688 | .ndo_set_mac_address = igbvf_set_mac, |
2689 | .ndo_change_mtu = igbvf_change_mtu, |
2690 | .ndo_eth_ioctl = igbvf_ioctl, |
2691 | .ndo_tx_timeout = igbvf_tx_timeout, |
2692 | .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, |
2693 | .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, |
2694 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2695 | .ndo_poll_controller = igbvf_netpoll, |
2696 | #endif |
2697 | .ndo_set_features = igbvf_set_features, |
2698 | .ndo_features_check = igbvf_features_check, |
2699 | }; |
2700 | |
2701 | /** |
2702 | * igbvf_probe - Device Initialization Routine |
2703 | * @pdev: PCI device information struct |
2704 | * @ent: entry in igbvf_pci_tbl |
2705 | * |
2706 | * Returns 0 on success, negative on failure |
2707 | * |
2708 | * igbvf_probe initializes an adapter identified by a pci_dev structure. |
2709 | * The OS initialization, configuring of the adapter private structure, |
2710 | * and a hardware reset occur. |
2711 | **/ |
2712 | static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
2713 | { |
2714 | struct net_device *netdev; |
2715 | struct igbvf_adapter *adapter; |
2716 | struct e1000_hw *hw; |
2717 | const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; |
2718 | static int cards_found; |
2719 | int err; |
2720 | |
2721 | err = pci_enable_device_mem(dev: pdev); |
2722 | if (err) |
2723 | return err; |
2724 | |
2725 | err = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(64)); |
2726 | if (err) { |
2727 | dev_err(&pdev->dev, |
2728 | "No usable DMA configuration, aborting\n" ); |
2729 | goto err_dma; |
2730 | } |
2731 | |
2732 | err = pci_request_regions(pdev, igbvf_driver_name); |
2733 | if (err) |
2734 | goto err_pci_reg; |
2735 | |
2736 | pci_set_master(dev: pdev); |
2737 | |
2738 | err = -ENOMEM; |
2739 | netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); |
2740 | if (!netdev) |
2741 | goto err_alloc_etherdev; |
2742 | |
2743 | SET_NETDEV_DEV(netdev, &pdev->dev); |
2744 | |
2745 | pci_set_drvdata(pdev, data: netdev); |
2746 | adapter = netdev_priv(dev: netdev); |
2747 | hw = &adapter->hw; |
2748 | adapter->netdev = netdev; |
2749 | adapter->pdev = pdev; |
2750 | adapter->ei = ei; |
2751 | adapter->pba = ei->pba; |
2752 | adapter->flags = ei->flags; |
2753 | adapter->hw.back = adapter; |
2754 | adapter->hw.mac.type = ei->mac; |
2755 | adapter->msg_enable = netif_msg_init(debug_value: debug, DEFAULT_MSG_ENABLE); |
2756 | |
2757 | /* PCI config space info */ |
2758 | |
2759 | hw->vendor_id = pdev->vendor; |
2760 | hw->device_id = pdev->device; |
2761 | hw->subsystem_vendor_id = pdev->subsystem_vendor; |
2762 | hw->subsystem_device_id = pdev->subsystem_device; |
2763 | hw->revision_id = pdev->revision; |
2764 | |
2765 | err = -EIO; |
2766 | adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), |
2767 | pci_resource_len(pdev, 0)); |
2768 | |
2769 | if (!adapter->hw.hw_addr) |
2770 | goto err_ioremap; |
2771 | |
2772 | if (ei->get_variants) { |
2773 | err = ei->get_variants(adapter); |
2774 | if (err) |
2775 | goto err_get_variants; |
2776 | } |
2777 | |
2778 | /* setup adapter struct */ |
2779 | err = igbvf_sw_init(adapter); |
2780 | if (err) |
2781 | goto err_sw_init; |
2782 | |
2783 | /* construct the net_device struct */ |
2784 | netdev->netdev_ops = &igbvf_netdev_ops; |
2785 | |
2786 | igbvf_set_ethtool_ops(netdev); |
2787 | netdev->watchdog_timeo = 5 * HZ; |
2788 | strscpy(p: netdev->name, q: pci_name(pdev), size: sizeof(netdev->name)); |
2789 | |
2790 | adapter->bd_number = cards_found++; |
2791 | |
2792 | netdev->hw_features = NETIF_F_SG | |
2793 | NETIF_F_TSO | |
2794 | NETIF_F_TSO6 | |
2795 | NETIF_F_RXCSUM | |
2796 | NETIF_F_HW_CSUM | |
2797 | NETIF_F_SCTP_CRC; |
2798 | |
2799 | #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \ |
2800 | NETIF_F_GSO_GRE_CSUM | \ |
2801 | NETIF_F_GSO_IPXIP4 | \ |
2802 | NETIF_F_GSO_IPXIP6 | \ |
2803 | NETIF_F_GSO_UDP_TUNNEL | \ |
2804 | NETIF_F_GSO_UDP_TUNNEL_CSUM) |
2805 | |
2806 | netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES; |
2807 | netdev->hw_features |= NETIF_F_GSO_PARTIAL | |
2808 | IGBVF_GSO_PARTIAL_FEATURES; |
2809 | |
2810 | netdev->features = netdev->hw_features | NETIF_F_HIGHDMA; |
2811 | |
2812 | netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID; |
2813 | netdev->mpls_features |= NETIF_F_HW_CSUM; |
2814 | netdev->hw_enc_features |= netdev->vlan_features; |
2815 | |
2816 | /* set this bit last since it cannot be part of vlan_features */ |
2817 | netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | |
2818 | NETIF_F_HW_VLAN_CTAG_RX | |
2819 | NETIF_F_HW_VLAN_CTAG_TX; |
2820 | |
2821 | /* MTU range: 68 - 9216 */ |
2822 | netdev->min_mtu = ETH_MIN_MTU; |
2823 | netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE; |
2824 | |
2825 | spin_lock_bh(lock: &hw->mbx_lock); |
2826 | |
2827 | /*reset the controller to put the device in a known good state */ |
2828 | err = hw->mac.ops.reset_hw(hw); |
2829 | if (err) { |
2830 | dev_info(&pdev->dev, |
2831 | "PF still in reset state. Is the PF interface up?\n" ); |
2832 | } else { |
2833 | err = hw->mac.ops.read_mac_addr(hw); |
2834 | if (err) |
2835 | dev_info(&pdev->dev, "Error reading MAC address.\n" ); |
2836 | else if (is_zero_ether_addr(addr: adapter->hw.mac.addr)) |
2837 | dev_info(&pdev->dev, |
2838 | "MAC address not assigned by administrator.\n" ); |
2839 | eth_hw_addr_set(dev: netdev, addr: adapter->hw.mac.addr); |
2840 | } |
2841 | |
2842 | spin_unlock_bh(lock: &hw->mbx_lock); |
2843 | |
2844 | if (!is_valid_ether_addr(addr: netdev->dev_addr)) { |
2845 | dev_info(&pdev->dev, "Assigning random MAC address.\n" ); |
2846 | eth_hw_addr_random(dev: netdev); |
2847 | memcpy(adapter->hw.mac.addr, netdev->dev_addr, |
2848 | netdev->addr_len); |
2849 | } |
2850 | |
2851 | timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0); |
2852 | |
2853 | INIT_WORK(&adapter->reset_task, igbvf_reset_task); |
2854 | INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); |
2855 | |
2856 | /* ring size defaults */ |
2857 | adapter->rx_ring->count = 1024; |
2858 | adapter->tx_ring->count = 1024; |
2859 | |
2860 | /* reset the hardware with the new settings */ |
2861 | igbvf_reset(adapter); |
2862 | |
2863 | /* set hardware-specific flags */ |
2864 | if (adapter->hw.mac.type == e1000_vfadapt_i350) |
2865 | adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP; |
2866 | |
2867 | strcpy(p: netdev->name, q: "eth%d" ); |
2868 | err = register_netdev(dev: netdev); |
2869 | if (err) |
2870 | goto err_hw_init; |
2871 | |
2872 | /* tell the stack to leave us alone until igbvf_open() is called */ |
2873 | netif_carrier_off(dev: netdev); |
2874 | netif_stop_queue(dev: netdev); |
2875 | |
2876 | igbvf_print_device_info(adapter); |
2877 | |
2878 | igbvf_initialize_last_counter_stats(adapter); |
2879 | |
2880 | return 0; |
2881 | |
2882 | err_hw_init: |
2883 | netif_napi_del(napi: &adapter->rx_ring->napi); |
2884 | kfree(objp: adapter->tx_ring); |
2885 | kfree(objp: adapter->rx_ring); |
2886 | err_sw_init: |
2887 | igbvf_reset_interrupt_capability(adapter); |
2888 | err_get_variants: |
2889 | iounmap(addr: adapter->hw.hw_addr); |
2890 | err_ioremap: |
2891 | free_netdev(dev: netdev); |
2892 | err_alloc_etherdev: |
2893 | pci_release_regions(pdev); |
2894 | err_pci_reg: |
2895 | err_dma: |
2896 | pci_disable_device(dev: pdev); |
2897 | return err; |
2898 | } |
2899 | |
2900 | /** |
2901 | * igbvf_remove - Device Removal Routine |
2902 | * @pdev: PCI device information struct |
2903 | * |
2904 | * igbvf_remove is called by the PCI subsystem to alert the driver |
2905 | * that it should release a PCI device. The could be caused by a |
2906 | * Hot-Plug event, or because the driver is going to be removed from |
2907 | * memory. |
2908 | **/ |
2909 | static void igbvf_remove(struct pci_dev *pdev) |
2910 | { |
2911 | struct net_device *netdev = pci_get_drvdata(pdev); |
2912 | struct igbvf_adapter *adapter = netdev_priv(dev: netdev); |
2913 | struct e1000_hw *hw = &adapter->hw; |
2914 | |
2915 | /* The watchdog timer may be rescheduled, so explicitly |
2916 | * disable it from being rescheduled. |
2917 | */ |
2918 | set_bit(nr: __IGBVF_DOWN, addr: &adapter->state); |
2919 | del_timer_sync(timer: &adapter->watchdog_timer); |
2920 | |
2921 | cancel_work_sync(work: &adapter->reset_task); |
2922 | cancel_work_sync(work: &adapter->watchdog_task); |
2923 | |
2924 | unregister_netdev(dev: netdev); |
2925 | |
2926 | igbvf_reset_interrupt_capability(adapter); |
2927 | |
2928 | /* it is important to delete the NAPI struct prior to freeing the |
2929 | * Rx ring so that you do not end up with null pointer refs |
2930 | */ |
2931 | netif_napi_del(napi: &adapter->rx_ring->napi); |
2932 | kfree(objp: adapter->tx_ring); |
2933 | kfree(objp: adapter->rx_ring); |
2934 | |
2935 | iounmap(addr: hw->hw_addr); |
2936 | if (hw->flash_address) |
2937 | iounmap(addr: hw->flash_address); |
2938 | pci_release_regions(pdev); |
2939 | |
2940 | free_netdev(dev: netdev); |
2941 | |
2942 | pci_disable_device(dev: pdev); |
2943 | } |
2944 | |
2945 | /* PCI Error Recovery (ERS) */ |
2946 | static const struct pci_error_handlers igbvf_err_handler = { |
2947 | .error_detected = igbvf_io_error_detected, |
2948 | .slot_reset = igbvf_io_slot_reset, |
2949 | .resume = igbvf_io_resume, |
2950 | .reset_prepare = igbvf_io_prepare, |
2951 | .reset_done = igbvf_io_reset_done, |
2952 | }; |
2953 | |
2954 | static const struct pci_device_id igbvf_pci_tbl[] = { |
2955 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, |
2956 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf }, |
2957 | { } /* terminate list */ |
2958 | }; |
2959 | MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); |
2960 | |
2961 | static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume); |
2962 | |
2963 | /* PCI Device API Driver */ |
2964 | static struct pci_driver igbvf_driver = { |
2965 | .name = igbvf_driver_name, |
2966 | .id_table = igbvf_pci_tbl, |
2967 | .probe = igbvf_probe, |
2968 | .remove = igbvf_remove, |
2969 | .driver.pm = &igbvf_pm_ops, |
2970 | .shutdown = igbvf_shutdown, |
2971 | .err_handler = &igbvf_err_handler |
2972 | }; |
2973 | |
2974 | /** |
2975 | * igbvf_init_module - Driver Registration Routine |
2976 | * |
2977 | * igbvf_init_module is the first routine called when the driver is |
2978 | * loaded. All it does is register with the PCI subsystem. |
2979 | **/ |
2980 | static int __init igbvf_init_module(void) |
2981 | { |
2982 | int ret; |
2983 | |
2984 | pr_info("%s\n" , igbvf_driver_string); |
2985 | pr_info("%s\n" , igbvf_copyright); |
2986 | |
2987 | ret = pci_register_driver(&igbvf_driver); |
2988 | |
2989 | return ret; |
2990 | } |
2991 | module_init(igbvf_init_module); |
2992 | |
2993 | /** |
2994 | * igbvf_exit_module - Driver Exit Cleanup Routine |
2995 | * |
2996 | * igbvf_exit_module is called just before the driver is removed |
2997 | * from memory. |
2998 | **/ |
2999 | static void __exit igbvf_exit_module(void) |
3000 | { |
3001 | pci_unregister_driver(dev: &igbvf_driver); |
3002 | } |
3003 | module_exit(igbvf_exit_module); |
3004 | |
3005 | MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>" ); |
3006 | MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver" ); |
3007 | MODULE_LICENSE("GPL v2" ); |
3008 | |
3009 | /* netdev.c */ |
3010 | |