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d4e0fe01 AD |
1 | /******************************************************************************* |
2 | ||
3 | Intel(R) 82576 Virtual Function Linux driver | |
2c20ebba | 4 | Copyright(c) 2009 - 2010 Intel Corporation. |
d4e0fe01 AD |
5 | |
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms and conditions of the GNU General Public License, | |
8 | version 2, as published by the Free Software Foundation. | |
9 | ||
10 | This program is distributed in the hope it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., | |
17 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in | |
20 | the file called "COPYING". | |
21 | ||
22 | Contact Information: | |
23 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
24 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | ||
26 | *******************************************************************************/ | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/vmalloc.h> | |
33 | #include <linux/pagemap.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/tcp.h> | |
37 | #include <linux/ipv6.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
d4e0fe01 AD |
39 | #include <net/checksum.h> |
40 | #include <net/ip6_checksum.h> | |
41 | #include <linux/mii.h> | |
42 | #include <linux/ethtool.h> | |
43 | #include <linux/if_vlan.h> | |
d4e0fe01 AD |
44 | |
45 | #include "igbvf.h" | |
46 | ||
2c20ebba | 47 | #define DRV_VERSION "1.0.8-k0" |
d4e0fe01 AD |
48 | char igbvf_driver_name[] = "igbvf"; |
49 | const char igbvf_driver_version[] = DRV_VERSION; | |
50 | static const char igbvf_driver_string[] = | |
51 | "Intel(R) Virtual Function Network Driver"; | |
2c20ebba GR |
52 | static const char igbvf_copyright[] = |
53 | "Copyright (c) 2009 - 2010 Intel Corporation."; | |
d4e0fe01 AD |
54 | |
55 | static int igbvf_poll(struct napi_struct *napi, int budget); | |
2d165771 AD |
56 | static void igbvf_reset(struct igbvf_adapter *); |
57 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *); | |
58 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); | |
d4e0fe01 AD |
59 | |
60 | static struct igbvf_info igbvf_vf_info = { | |
61 | .mac = e1000_vfadapt, | |
0364d6fd | 62 | .flags = 0, |
d4e0fe01 AD |
63 | .pba = 10, |
64 | .init_ops = e1000_init_function_pointers_vf, | |
65 | }; | |
66 | ||
031d7952 WM |
67 | static struct igbvf_info igbvf_i350_vf_info = { |
68 | .mac = e1000_vfadapt_i350, | |
69 | .flags = 0, | |
70 | .pba = 10, | |
71 | .init_ops = e1000_init_function_pointers_vf, | |
72 | }; | |
73 | ||
d4e0fe01 AD |
74 | static const struct igbvf_info *igbvf_info_tbl[] = { |
75 | [board_vf] = &igbvf_vf_info, | |
031d7952 | 76 | [board_i350_vf] = &igbvf_i350_vf_info, |
d4e0fe01 AD |
77 | }; |
78 | ||
79 | /** | |
80 | * igbvf_desc_unused - calculate if we have unused descriptors | |
81 | **/ | |
82 | static int igbvf_desc_unused(struct igbvf_ring *ring) | |
83 | { | |
84 | if (ring->next_to_clean > ring->next_to_use) | |
85 | return ring->next_to_clean - ring->next_to_use - 1; | |
86 | ||
87 | return ring->count + ring->next_to_clean - ring->next_to_use - 1; | |
88 | } | |
89 | ||
90 | /** | |
91 | * igbvf_receive_skb - helper function to handle Rx indications | |
92 | * @adapter: board private structure | |
93 | * @status: descriptor status field as written by hardware | |
94 | * @vlan: descriptor vlan field as written by hardware (no le/be conversion) | |
95 | * @skb: pointer to sk_buff to be indicated to stack | |
96 | **/ | |
97 | static void igbvf_receive_skb(struct igbvf_adapter *adapter, | |
98 | struct net_device *netdev, | |
99 | struct sk_buff *skb, | |
100 | u32 status, u16 vlan) | |
101 | { | |
102 | if (adapter->vlgrp && (status & E1000_RXD_STAT_VP)) | |
103 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, | |
104 | le16_to_cpu(vlan) & | |
105 | E1000_RXD_SPC_VLAN_MASK); | |
106 | else | |
107 | netif_receive_skb(skb); | |
d4e0fe01 AD |
108 | } |
109 | ||
110 | static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, | |
111 | u32 status_err, struct sk_buff *skb) | |
112 | { | |
bc8acf2c | 113 | skb_checksum_none_assert(skb); |
d4e0fe01 AD |
114 | |
115 | /* Ignore Checksum bit is set or checksum is disabled through ethtool */ | |
0364d6fd AD |
116 | if ((status_err & E1000_RXD_STAT_IXSM) || |
117 | (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED)) | |
d4e0fe01 | 118 | return; |
0364d6fd | 119 | |
d4e0fe01 AD |
120 | /* TCP/UDP checksum error bit is set */ |
121 | if (status_err & | |
122 | (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { | |
123 | /* let the stack verify checksum errors */ | |
124 | adapter->hw_csum_err++; | |
125 | return; | |
126 | } | |
0364d6fd | 127 | |
d4e0fe01 AD |
128 | /* It must be a TCP or UDP packet with a valid checksum */ |
129 | if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) | |
130 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
131 | ||
132 | adapter->hw_csum_good++; | |
133 | } | |
134 | ||
135 | /** | |
136 | * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split | |
137 | * @rx_ring: address of ring structure to repopulate | |
138 | * @cleaned_count: number of buffers to repopulate | |
139 | **/ | |
140 | static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, | |
141 | int cleaned_count) | |
142 | { | |
143 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
144 | struct net_device *netdev = adapter->netdev; | |
145 | struct pci_dev *pdev = adapter->pdev; | |
146 | union e1000_adv_rx_desc *rx_desc; | |
147 | struct igbvf_buffer *buffer_info; | |
148 | struct sk_buff *skb; | |
149 | unsigned int i; | |
150 | int bufsz; | |
151 | ||
152 | i = rx_ring->next_to_use; | |
153 | buffer_info = &rx_ring->buffer_info[i]; | |
154 | ||
155 | if (adapter->rx_ps_hdr_size) | |
156 | bufsz = adapter->rx_ps_hdr_size; | |
157 | else | |
158 | bufsz = adapter->rx_buffer_len; | |
d4e0fe01 AD |
159 | |
160 | while (cleaned_count--) { | |
161 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
162 | ||
163 | if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { | |
164 | if (!buffer_info->page) { | |
165 | buffer_info->page = alloc_page(GFP_ATOMIC); | |
166 | if (!buffer_info->page) { | |
167 | adapter->alloc_rx_buff_failed++; | |
168 | goto no_buffers; | |
169 | } | |
170 | buffer_info->page_offset = 0; | |
171 | } else { | |
172 | buffer_info->page_offset ^= PAGE_SIZE / 2; | |
173 | } | |
174 | buffer_info->page_dma = | |
123e9f1a | 175 | dma_map_page(&pdev->dev, buffer_info->page, |
d4e0fe01 AD |
176 | buffer_info->page_offset, |
177 | PAGE_SIZE / 2, | |
123e9f1a | 178 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
179 | } |
180 | ||
181 | if (!buffer_info->skb) { | |
89d71a66 | 182 | skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
d4e0fe01 AD |
183 | if (!skb) { |
184 | adapter->alloc_rx_buff_failed++; | |
185 | goto no_buffers; | |
186 | } | |
187 | ||
d4e0fe01 | 188 | buffer_info->skb = skb; |
123e9f1a | 189 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, |
d4e0fe01 | 190 | bufsz, |
123e9f1a | 191 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
192 | } |
193 | /* Refresh the desc even if buffer_addrs didn't change because | |
194 | * each write-back erases this info. */ | |
195 | if (adapter->rx_ps_hdr_size) { | |
196 | rx_desc->read.pkt_addr = | |
197 | cpu_to_le64(buffer_info->page_dma); | |
198 | rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); | |
199 | } else { | |
200 | rx_desc->read.pkt_addr = | |
201 | cpu_to_le64(buffer_info->dma); | |
202 | rx_desc->read.hdr_addr = 0; | |
203 | } | |
204 | ||
205 | i++; | |
206 | if (i == rx_ring->count) | |
207 | i = 0; | |
208 | buffer_info = &rx_ring->buffer_info[i]; | |
209 | } | |
210 | ||
211 | no_buffers: | |
212 | if (rx_ring->next_to_use != i) { | |
213 | rx_ring->next_to_use = i; | |
214 | if (i == 0) | |
215 | i = (rx_ring->count - 1); | |
216 | else | |
217 | i--; | |
218 | ||
219 | /* Force memory writes to complete before letting h/w | |
220 | * know there are new descriptors to fetch. (Only | |
221 | * applicable for weak-ordered memory model archs, | |
222 | * such as IA-64). */ | |
223 | wmb(); | |
224 | writel(i, adapter->hw.hw_addr + rx_ring->tail); | |
225 | } | |
226 | } | |
227 | ||
228 | /** | |
229 | * igbvf_clean_rx_irq - Send received data up the network stack; legacy | |
230 | * @adapter: board private structure | |
231 | * | |
232 | * the return value indicates whether actual cleaning was done, there | |
233 | * is no guarantee that everything was cleaned | |
234 | **/ | |
235 | static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, | |
236 | int *work_done, int work_to_do) | |
237 | { | |
238 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
239 | struct net_device *netdev = adapter->netdev; | |
240 | struct pci_dev *pdev = adapter->pdev; | |
241 | union e1000_adv_rx_desc *rx_desc, *next_rxd; | |
242 | struct igbvf_buffer *buffer_info, *next_buffer; | |
243 | struct sk_buff *skb; | |
244 | bool cleaned = false; | |
245 | int cleaned_count = 0; | |
246 | unsigned int total_bytes = 0, total_packets = 0; | |
247 | unsigned int i; | |
248 | u32 length, hlen, staterr; | |
249 | ||
250 | i = rx_ring->next_to_clean; | |
251 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
252 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
253 | ||
254 | while (staterr & E1000_RXD_STAT_DD) { | |
255 | if (*work_done >= work_to_do) | |
256 | break; | |
257 | (*work_done)++; | |
2d0bb1c1 | 258 | rmb(); /* read descriptor and rx_buffer_info after status DD */ |
d4e0fe01 AD |
259 | |
260 | buffer_info = &rx_ring->buffer_info[i]; | |
261 | ||
262 | /* HW will not DMA in data larger than the given buffer, even | |
263 | * if it parses the (NFS, of course) header to be larger. In | |
264 | * that case, it fills the header buffer and spills the rest | |
265 | * into the page. | |
266 | */ | |
267 | hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) & | |
268 | E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; | |
269 | if (hlen > adapter->rx_ps_hdr_size) | |
270 | hlen = adapter->rx_ps_hdr_size; | |
271 | ||
272 | length = le16_to_cpu(rx_desc->wb.upper.length); | |
273 | cleaned = true; | |
274 | cleaned_count++; | |
275 | ||
276 | skb = buffer_info->skb; | |
277 | prefetch(skb->data - NET_IP_ALIGN); | |
278 | buffer_info->skb = NULL; | |
279 | if (!adapter->rx_ps_hdr_size) { | |
123e9f1a | 280 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 281 | adapter->rx_buffer_len, |
123e9f1a | 282 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
283 | buffer_info->dma = 0; |
284 | skb_put(skb, length); | |
285 | goto send_up; | |
286 | } | |
287 | ||
288 | if (!skb_shinfo(skb)->nr_frags) { | |
123e9f1a | 289 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
92d947b7 | 290 | adapter->rx_ps_hdr_size, |
123e9f1a | 291 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
292 | skb_put(skb, hlen); |
293 | } | |
294 | ||
295 | if (length) { | |
123e9f1a | 296 | dma_unmap_page(&pdev->dev, buffer_info->page_dma, |
d4e0fe01 | 297 | PAGE_SIZE / 2, |
123e9f1a | 298 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
299 | buffer_info->page_dma = 0; |
300 | ||
ec857fd4 | 301 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, |
d4e0fe01 AD |
302 | buffer_info->page, |
303 | buffer_info->page_offset, | |
304 | length); | |
305 | ||
306 | if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || | |
307 | (page_count(buffer_info->page) != 1)) | |
308 | buffer_info->page = NULL; | |
309 | else | |
310 | get_page(buffer_info->page); | |
311 | ||
312 | skb->len += length; | |
313 | skb->data_len += length; | |
314 | skb->truesize += length; | |
315 | } | |
316 | send_up: | |
317 | i++; | |
318 | if (i == rx_ring->count) | |
319 | i = 0; | |
320 | next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
321 | prefetch(next_rxd); | |
322 | next_buffer = &rx_ring->buffer_info[i]; | |
323 | ||
324 | if (!(staterr & E1000_RXD_STAT_EOP)) { | |
325 | buffer_info->skb = next_buffer->skb; | |
326 | buffer_info->dma = next_buffer->dma; | |
327 | next_buffer->skb = skb; | |
328 | next_buffer->dma = 0; | |
329 | goto next_desc; | |
330 | } | |
331 | ||
332 | if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { | |
333 | dev_kfree_skb_irq(skb); | |
334 | goto next_desc; | |
335 | } | |
336 | ||
337 | total_bytes += skb->len; | |
338 | total_packets++; | |
339 | ||
340 | igbvf_rx_checksum_adv(adapter, staterr, skb); | |
341 | ||
342 | skb->protocol = eth_type_trans(skb, netdev); | |
343 | ||
344 | igbvf_receive_skb(adapter, netdev, skb, staterr, | |
345 | rx_desc->wb.upper.vlan); | |
346 | ||
d4e0fe01 AD |
347 | next_desc: |
348 | rx_desc->wb.upper.status_error = 0; | |
349 | ||
350 | /* return some buffers to hardware, one at a time is too slow */ | |
351 | if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { | |
352 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
353 | cleaned_count = 0; | |
354 | } | |
355 | ||
356 | /* use prefetched values */ | |
357 | rx_desc = next_rxd; | |
358 | buffer_info = next_buffer; | |
359 | ||
360 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
361 | } | |
362 | ||
363 | rx_ring->next_to_clean = i; | |
364 | cleaned_count = igbvf_desc_unused(rx_ring); | |
365 | ||
366 | if (cleaned_count) | |
367 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
368 | ||
369 | adapter->total_rx_packets += total_packets; | |
370 | adapter->total_rx_bytes += total_bytes; | |
371 | adapter->net_stats.rx_bytes += total_bytes; | |
372 | adapter->net_stats.rx_packets += total_packets; | |
373 | return cleaned; | |
374 | } | |
375 | ||
376 | static void igbvf_put_txbuf(struct igbvf_adapter *adapter, | |
377 | struct igbvf_buffer *buffer_info) | |
378 | { | |
a7d5ca40 AD |
379 | if (buffer_info->dma) { |
380 | if (buffer_info->mapped_as_page) | |
123e9f1a | 381 | dma_unmap_page(&adapter->pdev->dev, |
a7d5ca40 AD |
382 | buffer_info->dma, |
383 | buffer_info->length, | |
123e9f1a | 384 | DMA_TO_DEVICE); |
a7d5ca40 | 385 | else |
123e9f1a | 386 | dma_unmap_single(&adapter->pdev->dev, |
a7d5ca40 AD |
387 | buffer_info->dma, |
388 | buffer_info->length, | |
123e9f1a | 389 | DMA_TO_DEVICE); |
a7d5ca40 AD |
390 | buffer_info->dma = 0; |
391 | } | |
d4e0fe01 | 392 | if (buffer_info->skb) { |
d4e0fe01 AD |
393 | dev_kfree_skb_any(buffer_info->skb); |
394 | buffer_info->skb = NULL; | |
395 | } | |
396 | buffer_info->time_stamp = 0; | |
397 | } | |
398 | ||
d4e0fe01 AD |
399 | /** |
400 | * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) | |
401 | * @adapter: board private structure | |
402 | * | |
403 | * Return 0 on success, negative on failure | |
404 | **/ | |
405 | int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, | |
406 | struct igbvf_ring *tx_ring) | |
407 | { | |
408 | struct pci_dev *pdev = adapter->pdev; | |
409 | int size; | |
410 | ||
411 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
89bf67f1 | 412 | tx_ring->buffer_info = vzalloc(size); |
d4e0fe01 AD |
413 | if (!tx_ring->buffer_info) |
414 | goto err; | |
d4e0fe01 AD |
415 | |
416 | /* round up to nearest 4K */ | |
417 | tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); | |
418 | tx_ring->size = ALIGN(tx_ring->size, 4096); | |
419 | ||
123e9f1a NN |
420 | tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, |
421 | &tx_ring->dma, GFP_KERNEL); | |
d4e0fe01 AD |
422 | |
423 | if (!tx_ring->desc) | |
424 | goto err; | |
425 | ||
426 | tx_ring->adapter = adapter; | |
427 | tx_ring->next_to_use = 0; | |
428 | tx_ring->next_to_clean = 0; | |
429 | ||
430 | return 0; | |
431 | err: | |
432 | vfree(tx_ring->buffer_info); | |
433 | dev_err(&adapter->pdev->dev, | |
434 | "Unable to allocate memory for the transmit descriptor ring\n"); | |
435 | return -ENOMEM; | |
436 | } | |
437 | ||
438 | /** | |
439 | * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) | |
440 | * @adapter: board private structure | |
441 | * | |
442 | * Returns 0 on success, negative on failure | |
443 | **/ | |
444 | int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, | |
445 | struct igbvf_ring *rx_ring) | |
446 | { | |
447 | struct pci_dev *pdev = adapter->pdev; | |
448 | int size, desc_len; | |
449 | ||
450 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
89bf67f1 | 451 | rx_ring->buffer_info = vzalloc(size); |
d4e0fe01 AD |
452 | if (!rx_ring->buffer_info) |
453 | goto err; | |
d4e0fe01 AD |
454 | |
455 | desc_len = sizeof(union e1000_adv_rx_desc); | |
456 | ||
457 | /* Round up to nearest 4K */ | |
458 | rx_ring->size = rx_ring->count * desc_len; | |
459 | rx_ring->size = ALIGN(rx_ring->size, 4096); | |
460 | ||
123e9f1a NN |
461 | rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, |
462 | &rx_ring->dma, GFP_KERNEL); | |
d4e0fe01 AD |
463 | |
464 | if (!rx_ring->desc) | |
465 | goto err; | |
466 | ||
467 | rx_ring->next_to_clean = 0; | |
468 | rx_ring->next_to_use = 0; | |
469 | ||
470 | rx_ring->adapter = adapter; | |
471 | ||
472 | return 0; | |
473 | ||
474 | err: | |
475 | vfree(rx_ring->buffer_info); | |
476 | rx_ring->buffer_info = NULL; | |
477 | dev_err(&adapter->pdev->dev, | |
478 | "Unable to allocate memory for the receive descriptor ring\n"); | |
479 | return -ENOMEM; | |
480 | } | |
481 | ||
482 | /** | |
483 | * igbvf_clean_tx_ring - Free Tx Buffers | |
484 | * @tx_ring: ring to be cleaned | |
485 | **/ | |
486 | static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) | |
487 | { | |
488 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
489 | struct igbvf_buffer *buffer_info; | |
490 | unsigned long size; | |
491 | unsigned int i; | |
492 | ||
493 | if (!tx_ring->buffer_info) | |
494 | return; | |
495 | ||
496 | /* Free all the Tx ring sk_buffs */ | |
497 | for (i = 0; i < tx_ring->count; i++) { | |
498 | buffer_info = &tx_ring->buffer_info[i]; | |
499 | igbvf_put_txbuf(adapter, buffer_info); | |
500 | } | |
501 | ||
502 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
503 | memset(tx_ring->buffer_info, 0, size); | |
504 | ||
505 | /* Zero out the descriptor ring */ | |
506 | memset(tx_ring->desc, 0, tx_ring->size); | |
507 | ||
508 | tx_ring->next_to_use = 0; | |
509 | tx_ring->next_to_clean = 0; | |
510 | ||
511 | writel(0, adapter->hw.hw_addr + tx_ring->head); | |
512 | writel(0, adapter->hw.hw_addr + tx_ring->tail); | |
513 | } | |
514 | ||
515 | /** | |
516 | * igbvf_free_tx_resources - Free Tx Resources per Queue | |
517 | * @tx_ring: ring to free resources from | |
518 | * | |
519 | * Free all transmit software resources | |
520 | **/ | |
521 | void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) | |
522 | { | |
523 | struct pci_dev *pdev = tx_ring->adapter->pdev; | |
524 | ||
525 | igbvf_clean_tx_ring(tx_ring); | |
526 | ||
527 | vfree(tx_ring->buffer_info); | |
528 | tx_ring->buffer_info = NULL; | |
529 | ||
123e9f1a NN |
530 | dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
531 | tx_ring->dma); | |
d4e0fe01 AD |
532 | |
533 | tx_ring->desc = NULL; | |
534 | } | |
535 | ||
536 | /** | |
537 | * igbvf_clean_rx_ring - Free Rx Buffers per Queue | |
538 | * @adapter: board private structure | |
539 | **/ | |
540 | static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) | |
541 | { | |
542 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
543 | struct igbvf_buffer *buffer_info; | |
544 | struct pci_dev *pdev = adapter->pdev; | |
545 | unsigned long size; | |
546 | unsigned int i; | |
547 | ||
548 | if (!rx_ring->buffer_info) | |
549 | return; | |
550 | ||
551 | /* Free all the Rx ring sk_buffs */ | |
552 | for (i = 0; i < rx_ring->count; i++) { | |
553 | buffer_info = &rx_ring->buffer_info[i]; | |
554 | if (buffer_info->dma) { | |
555 | if (adapter->rx_ps_hdr_size){ | |
123e9f1a | 556 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 557 | adapter->rx_ps_hdr_size, |
123e9f1a | 558 | DMA_FROM_DEVICE); |
d4e0fe01 | 559 | } else { |
123e9f1a | 560 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 561 | adapter->rx_buffer_len, |
123e9f1a | 562 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
563 | } |
564 | buffer_info->dma = 0; | |
565 | } | |
566 | ||
567 | if (buffer_info->skb) { | |
568 | dev_kfree_skb(buffer_info->skb); | |
569 | buffer_info->skb = NULL; | |
570 | } | |
571 | ||
572 | if (buffer_info->page) { | |
573 | if (buffer_info->page_dma) | |
123e9f1a NN |
574 | dma_unmap_page(&pdev->dev, |
575 | buffer_info->page_dma, | |
d4e0fe01 | 576 | PAGE_SIZE / 2, |
123e9f1a | 577 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
578 | put_page(buffer_info->page); |
579 | buffer_info->page = NULL; | |
580 | buffer_info->page_dma = 0; | |
581 | buffer_info->page_offset = 0; | |
582 | } | |
583 | } | |
584 | ||
585 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
586 | memset(rx_ring->buffer_info, 0, size); | |
587 | ||
588 | /* Zero out the descriptor ring */ | |
589 | memset(rx_ring->desc, 0, rx_ring->size); | |
590 | ||
591 | rx_ring->next_to_clean = 0; | |
592 | rx_ring->next_to_use = 0; | |
593 | ||
594 | writel(0, adapter->hw.hw_addr + rx_ring->head); | |
595 | writel(0, adapter->hw.hw_addr + rx_ring->tail); | |
596 | } | |
597 | ||
598 | /** | |
599 | * igbvf_free_rx_resources - Free Rx Resources | |
600 | * @rx_ring: ring to clean the resources from | |
601 | * | |
602 | * Free all receive software resources | |
603 | **/ | |
604 | ||
605 | void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) | |
606 | { | |
607 | struct pci_dev *pdev = rx_ring->adapter->pdev; | |
608 | ||
609 | igbvf_clean_rx_ring(rx_ring); | |
610 | ||
611 | vfree(rx_ring->buffer_info); | |
612 | rx_ring->buffer_info = NULL; | |
613 | ||
614 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, | |
615 | rx_ring->dma); | |
616 | rx_ring->desc = NULL; | |
617 | } | |
618 | ||
619 | /** | |
620 | * igbvf_update_itr - update the dynamic ITR value based on statistics | |
621 | * @adapter: pointer to adapter | |
622 | * @itr_setting: current adapter->itr | |
623 | * @packets: the number of packets during this measurement interval | |
624 | * @bytes: the number of bytes during this measurement interval | |
625 | * | |
626 | * Stores a new ITR value based on packets and byte | |
627 | * counts during the last interrupt. The advantage of per interrupt | |
628 | * computation is faster updates and more accurate ITR for the current | |
629 | * traffic pattern. Constants in this function were computed | |
630 | * based on theoretical maximum wire speed and thresholds were set based | |
631 | * on testing data as well as attempting to minimize response time | |
632 | * while increasing bulk throughput. This functionality is controlled | |
633 | * by the InterruptThrottleRate module parameter. | |
634 | **/ | |
635 | static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter, | |
636 | u16 itr_setting, int packets, | |
637 | int bytes) | |
638 | { | |
639 | unsigned int retval = itr_setting; | |
640 | ||
641 | if (packets == 0) | |
642 | goto update_itr_done; | |
643 | ||
644 | switch (itr_setting) { | |
645 | case lowest_latency: | |
646 | /* handle TSO and jumbo frames */ | |
647 | if (bytes/packets > 8000) | |
648 | retval = bulk_latency; | |
649 | else if ((packets < 5) && (bytes > 512)) | |
650 | retval = low_latency; | |
651 | break; | |
652 | case low_latency: /* 50 usec aka 20000 ints/s */ | |
653 | if (bytes > 10000) { | |
654 | /* this if handles the TSO accounting */ | |
655 | if (bytes/packets > 8000) | |
656 | retval = bulk_latency; | |
657 | else if ((packets < 10) || ((bytes/packets) > 1200)) | |
658 | retval = bulk_latency; | |
659 | else if ((packets > 35)) | |
660 | retval = lowest_latency; | |
661 | } else if (bytes/packets > 2000) { | |
662 | retval = bulk_latency; | |
663 | } else if (packets <= 2 && bytes < 512) { | |
664 | retval = lowest_latency; | |
665 | } | |
666 | break; | |
667 | case bulk_latency: /* 250 usec aka 4000 ints/s */ | |
668 | if (bytes > 25000) { | |
669 | if (packets > 35) | |
670 | retval = low_latency; | |
671 | } else if (bytes < 6000) { | |
672 | retval = low_latency; | |
673 | } | |
674 | break; | |
675 | } | |
676 | ||
677 | update_itr_done: | |
678 | return retval; | |
679 | } | |
680 | ||
681 | static void igbvf_set_itr(struct igbvf_adapter *adapter) | |
682 | { | |
683 | struct e1000_hw *hw = &adapter->hw; | |
684 | u16 current_itr; | |
685 | u32 new_itr = adapter->itr; | |
686 | ||
687 | adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr, | |
688 | adapter->total_tx_packets, | |
689 | adapter->total_tx_bytes); | |
690 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ | |
691 | if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) | |
692 | adapter->tx_itr = low_latency; | |
693 | ||
694 | adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr, | |
695 | adapter->total_rx_packets, | |
696 | adapter->total_rx_bytes); | |
697 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ | |
698 | if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) | |
699 | adapter->rx_itr = low_latency; | |
700 | ||
701 | current_itr = max(adapter->rx_itr, adapter->tx_itr); | |
702 | ||
703 | switch (current_itr) { | |
704 | /* counts and packets in update_itr are dependent on these numbers */ | |
705 | case lowest_latency: | |
706 | new_itr = 70000; | |
707 | break; | |
708 | case low_latency: | |
709 | new_itr = 20000; /* aka hwitr = ~200 */ | |
710 | break; | |
711 | case bulk_latency: | |
712 | new_itr = 4000; | |
713 | break; | |
714 | default: | |
715 | break; | |
716 | } | |
717 | ||
718 | if (new_itr != adapter->itr) { | |
719 | /* | |
720 | * this attempts to bias the interrupt rate towards Bulk | |
721 | * by adding intermediate steps when interrupt rate is | |
722 | * increasing | |
723 | */ | |
724 | new_itr = new_itr > adapter->itr ? | |
725 | min(adapter->itr + (new_itr >> 2), new_itr) : | |
726 | new_itr; | |
727 | adapter->itr = new_itr; | |
728 | adapter->rx_ring->itr_val = 1952; | |
729 | ||
730 | if (adapter->msix_entries) | |
731 | adapter->rx_ring->set_itr = 1; | |
732 | else | |
733 | ew32(ITR, 1952); | |
734 | } | |
735 | } | |
736 | ||
737 | /** | |
738 | * igbvf_clean_tx_irq - Reclaim resources after transmit completes | |
739 | * @adapter: board private structure | |
740 | * returns true if ring is completely cleaned | |
741 | **/ | |
742 | static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) | |
743 | { | |
744 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
d4e0fe01 AD |
745 | struct net_device *netdev = adapter->netdev; |
746 | struct igbvf_buffer *buffer_info; | |
747 | struct sk_buff *skb; | |
748 | union e1000_adv_tx_desc *tx_desc, *eop_desc; | |
749 | unsigned int total_bytes = 0, total_packets = 0; | |
750 | unsigned int i, eop, count = 0; | |
751 | bool cleaned = false; | |
752 | ||
753 | i = tx_ring->next_to_clean; | |
754 | eop = tx_ring->buffer_info[i].next_to_watch; | |
755 | eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); | |
756 | ||
757 | while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) && | |
758 | (count < tx_ring->count)) { | |
2d0bb1c1 | 759 | rmb(); /* read buffer_info after eop_desc status */ |
d4e0fe01 AD |
760 | for (cleaned = false; !cleaned; count++) { |
761 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
762 | buffer_info = &tx_ring->buffer_info[i]; | |
763 | cleaned = (i == eop); | |
764 | skb = buffer_info->skb; | |
765 | ||
766 | if (skb) { | |
767 | unsigned int segs, bytecount; | |
768 | ||
769 | /* gso_segs is currently only valid for tcp */ | |
770 | segs = skb_shinfo(skb)->gso_segs ?: 1; | |
771 | /* multiply data chunks by size of headers */ | |
772 | bytecount = ((segs - 1) * skb_headlen(skb)) + | |
773 | skb->len; | |
774 | total_packets += segs; | |
775 | total_bytes += bytecount; | |
776 | } | |
777 | ||
778 | igbvf_put_txbuf(adapter, buffer_info); | |
779 | tx_desc->wb.status = 0; | |
780 | ||
781 | i++; | |
782 | if (i == tx_ring->count) | |
783 | i = 0; | |
784 | } | |
785 | eop = tx_ring->buffer_info[i].next_to_watch; | |
786 | eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); | |
787 | } | |
788 | ||
789 | tx_ring->next_to_clean = i; | |
790 | ||
791 | if (unlikely(count && | |
792 | netif_carrier_ok(netdev) && | |
793 | igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { | |
794 | /* Make sure that anybody stopping the queue after this | |
795 | * sees the new next_to_clean. | |
796 | */ | |
797 | smp_mb(); | |
798 | if (netif_queue_stopped(netdev) && | |
799 | !(test_bit(__IGBVF_DOWN, &adapter->state))) { | |
800 | netif_wake_queue(netdev); | |
801 | ++adapter->restart_queue; | |
802 | } | |
803 | } | |
804 | ||
d4e0fe01 AD |
805 | adapter->net_stats.tx_bytes += total_bytes; |
806 | adapter->net_stats.tx_packets += total_packets; | |
807540ba | 807 | return count < tx_ring->count; |
d4e0fe01 AD |
808 | } |
809 | ||
810 | static irqreturn_t igbvf_msix_other(int irq, void *data) | |
811 | { | |
812 | struct net_device *netdev = data; | |
813 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
814 | struct e1000_hw *hw = &adapter->hw; | |
815 | ||
816 | adapter->int_counter1++; | |
817 | ||
818 | netif_carrier_off(netdev); | |
819 | hw->mac.get_link_status = 1; | |
820 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
821 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
822 | ||
823 | ew32(EIMS, adapter->eims_other); | |
824 | ||
825 | return IRQ_HANDLED; | |
826 | } | |
827 | ||
828 | static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) | |
829 | { | |
830 | struct net_device *netdev = data; | |
831 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
832 | struct e1000_hw *hw = &adapter->hw; | |
833 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
834 | ||
835 | ||
836 | adapter->total_tx_bytes = 0; | |
837 | adapter->total_tx_packets = 0; | |
838 | ||
839 | /* auto mask will automatically reenable the interrupt when we write | |
840 | * EICS */ | |
841 | if (!igbvf_clean_tx_irq(tx_ring)) | |
842 | /* Ring was not completely cleaned, so fire another interrupt */ | |
843 | ew32(EICS, tx_ring->eims_value); | |
844 | else | |
845 | ew32(EIMS, tx_ring->eims_value); | |
846 | ||
847 | return IRQ_HANDLED; | |
848 | } | |
849 | ||
850 | static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) | |
851 | { | |
852 | struct net_device *netdev = data; | |
853 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
854 | ||
855 | adapter->int_counter0++; | |
856 | ||
857 | /* Write the ITR value calculated at the end of the | |
858 | * previous interrupt. | |
859 | */ | |
860 | if (adapter->rx_ring->set_itr) { | |
861 | writel(adapter->rx_ring->itr_val, | |
862 | adapter->hw.hw_addr + adapter->rx_ring->itr_register); | |
863 | adapter->rx_ring->set_itr = 0; | |
864 | } | |
865 | ||
866 | if (napi_schedule_prep(&adapter->rx_ring->napi)) { | |
867 | adapter->total_rx_bytes = 0; | |
868 | adapter->total_rx_packets = 0; | |
869 | __napi_schedule(&adapter->rx_ring->napi); | |
870 | } | |
871 | ||
872 | return IRQ_HANDLED; | |
873 | } | |
874 | ||
875 | #define IGBVF_NO_QUEUE -1 | |
876 | ||
877 | static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, | |
878 | int tx_queue, int msix_vector) | |
879 | { | |
880 | struct e1000_hw *hw = &adapter->hw; | |
881 | u32 ivar, index; | |
882 | ||
883 | /* 82576 uses a table-based method for assigning vectors. | |
884 | Each queue has a single entry in the table to which we write | |
885 | a vector number along with a "valid" bit. Sadly, the layout | |
886 | of the table is somewhat counterintuitive. */ | |
887 | if (rx_queue > IGBVF_NO_QUEUE) { | |
888 | index = (rx_queue >> 1); | |
889 | ivar = array_er32(IVAR0, index); | |
890 | if (rx_queue & 0x1) { | |
891 | /* vector goes into third byte of register */ | |
892 | ivar = ivar & 0xFF00FFFF; | |
893 | ivar |= (msix_vector | E1000_IVAR_VALID) << 16; | |
894 | } else { | |
895 | /* vector goes into low byte of register */ | |
896 | ivar = ivar & 0xFFFFFF00; | |
897 | ivar |= msix_vector | E1000_IVAR_VALID; | |
898 | } | |
899 | adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; | |
900 | array_ew32(IVAR0, index, ivar); | |
901 | } | |
902 | if (tx_queue > IGBVF_NO_QUEUE) { | |
903 | index = (tx_queue >> 1); | |
904 | ivar = array_er32(IVAR0, index); | |
905 | if (tx_queue & 0x1) { | |
906 | /* vector goes into high byte of register */ | |
907 | ivar = ivar & 0x00FFFFFF; | |
908 | ivar |= (msix_vector | E1000_IVAR_VALID) << 24; | |
909 | } else { | |
910 | /* vector goes into second byte of register */ | |
911 | ivar = ivar & 0xFFFF00FF; | |
912 | ivar |= (msix_vector | E1000_IVAR_VALID) << 8; | |
913 | } | |
914 | adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; | |
915 | array_ew32(IVAR0, index, ivar); | |
916 | } | |
917 | } | |
918 | ||
919 | /** | |
920 | * igbvf_configure_msix - Configure MSI-X hardware | |
921 | * | |
922 | * igbvf_configure_msix sets up the hardware to properly | |
923 | * generate MSI-X interrupts. | |
924 | **/ | |
925 | static void igbvf_configure_msix(struct igbvf_adapter *adapter) | |
926 | { | |
927 | u32 tmp; | |
928 | struct e1000_hw *hw = &adapter->hw; | |
929 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
930 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
931 | int vector = 0; | |
932 | ||
933 | adapter->eims_enable_mask = 0; | |
934 | ||
935 | igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); | |
936 | adapter->eims_enable_mask |= tx_ring->eims_value; | |
937 | if (tx_ring->itr_val) | |
938 | writel(tx_ring->itr_val, | |
939 | hw->hw_addr + tx_ring->itr_register); | |
940 | else | |
941 | writel(1952, hw->hw_addr + tx_ring->itr_register); | |
942 | ||
943 | igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); | |
944 | adapter->eims_enable_mask |= rx_ring->eims_value; | |
945 | if (rx_ring->itr_val) | |
946 | writel(rx_ring->itr_val, | |
947 | hw->hw_addr + rx_ring->itr_register); | |
948 | else | |
949 | writel(1952, hw->hw_addr + rx_ring->itr_register); | |
950 | ||
951 | /* set vector for other causes, i.e. link changes */ | |
952 | ||
953 | tmp = (vector++ | E1000_IVAR_VALID); | |
954 | ||
955 | ew32(IVAR_MISC, tmp); | |
956 | ||
957 | adapter->eims_enable_mask = (1 << (vector)) - 1; | |
958 | adapter->eims_other = 1 << (vector - 1); | |
959 | e1e_flush(); | |
960 | } | |
961 | ||
2d165771 | 962 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
963 | { |
964 | if (adapter->msix_entries) { | |
965 | pci_disable_msix(adapter->pdev); | |
966 | kfree(adapter->msix_entries); | |
967 | adapter->msix_entries = NULL; | |
968 | } | |
969 | } | |
970 | ||
971 | /** | |
972 | * igbvf_set_interrupt_capability - set MSI or MSI-X if supported | |
973 | * | |
974 | * Attempt to configure interrupts using the best available | |
975 | * capabilities of the hardware and kernel. | |
976 | **/ | |
2d165771 | 977 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
978 | { |
979 | int err = -ENOMEM; | |
980 | int i; | |
981 | ||
982 | /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */ | |
983 | adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), | |
984 | GFP_KERNEL); | |
985 | if (adapter->msix_entries) { | |
986 | for (i = 0; i < 3; i++) | |
987 | adapter->msix_entries[i].entry = i; | |
988 | ||
989 | err = pci_enable_msix(adapter->pdev, | |
990 | adapter->msix_entries, 3); | |
991 | } | |
992 | ||
993 | if (err) { | |
994 | /* MSI-X failed */ | |
995 | dev_err(&adapter->pdev->dev, | |
996 | "Failed to initialize MSI-X interrupts.\n"); | |
997 | igbvf_reset_interrupt_capability(adapter); | |
998 | } | |
999 | } | |
1000 | ||
1001 | /** | |
1002 | * igbvf_request_msix - Initialize MSI-X interrupts | |
1003 | * | |
1004 | * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the | |
1005 | * kernel. | |
1006 | **/ | |
1007 | static int igbvf_request_msix(struct igbvf_adapter *adapter) | |
1008 | { | |
1009 | struct net_device *netdev = adapter->netdev; | |
1010 | int err = 0, vector = 0; | |
1011 | ||
1012 | if (strlen(netdev->name) < (IFNAMSIZ - 5)) { | |
1013 | sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); | |
1014 | sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); | |
1015 | } else { | |
1016 | memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); | |
1017 | memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); | |
1018 | } | |
1019 | ||
1020 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1021 | igbvf_intr_msix_tx, 0, adapter->tx_ring->name, |
d4e0fe01 AD |
1022 | netdev); |
1023 | if (err) | |
1024 | goto out; | |
1025 | ||
1026 | adapter->tx_ring->itr_register = E1000_EITR(vector); | |
1027 | adapter->tx_ring->itr_val = 1952; | |
1028 | vector++; | |
1029 | ||
1030 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1031 | igbvf_intr_msix_rx, 0, adapter->rx_ring->name, |
d4e0fe01 AD |
1032 | netdev); |
1033 | if (err) | |
1034 | goto out; | |
1035 | ||
1036 | adapter->rx_ring->itr_register = E1000_EITR(vector); | |
1037 | adapter->rx_ring->itr_val = 1952; | |
1038 | vector++; | |
1039 | ||
1040 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1041 | igbvf_msix_other, 0, netdev->name, netdev); |
d4e0fe01 AD |
1042 | if (err) |
1043 | goto out; | |
1044 | ||
1045 | igbvf_configure_msix(adapter); | |
1046 | return 0; | |
1047 | out: | |
1048 | return err; | |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * igbvf_alloc_queues - Allocate memory for all rings | |
1053 | * @adapter: board private structure to initialize | |
1054 | **/ | |
1055 | static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter) | |
1056 | { | |
1057 | struct net_device *netdev = adapter->netdev; | |
1058 | ||
1059 | adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1060 | if (!adapter->tx_ring) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1064 | if (!adapter->rx_ring) { | |
1065 | kfree(adapter->tx_ring); | |
1066 | return -ENOMEM; | |
1067 | } | |
1068 | ||
1069 | netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | /** | |
1075 | * igbvf_request_irq - initialize interrupts | |
1076 | * | |
1077 | * Attempts to configure interrupts using the best available | |
1078 | * capabilities of the hardware and kernel. | |
1079 | **/ | |
1080 | static int igbvf_request_irq(struct igbvf_adapter *adapter) | |
1081 | { | |
1082 | int err = -1; | |
1083 | ||
1084 | /* igbvf supports msi-x only */ | |
1085 | if (adapter->msix_entries) | |
1086 | err = igbvf_request_msix(adapter); | |
1087 | ||
1088 | if (!err) | |
1089 | return err; | |
1090 | ||
1091 | dev_err(&adapter->pdev->dev, | |
1092 | "Unable to allocate interrupt, Error: %d\n", err); | |
1093 | ||
1094 | return err; | |
1095 | } | |
1096 | ||
1097 | static void igbvf_free_irq(struct igbvf_adapter *adapter) | |
1098 | { | |
1099 | struct net_device *netdev = adapter->netdev; | |
1100 | int vector; | |
1101 | ||
1102 | if (adapter->msix_entries) { | |
1103 | for (vector = 0; vector < 3; vector++) | |
1104 | free_irq(adapter->msix_entries[vector].vector, netdev); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * igbvf_irq_disable - Mask off interrupt generation on the NIC | |
1110 | **/ | |
1111 | static void igbvf_irq_disable(struct igbvf_adapter *adapter) | |
1112 | { | |
1113 | struct e1000_hw *hw = &adapter->hw; | |
1114 | ||
1115 | ew32(EIMC, ~0); | |
1116 | ||
1117 | if (adapter->msix_entries) | |
1118 | ew32(EIAC, 0); | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * igbvf_irq_enable - Enable default interrupt generation settings | |
1123 | **/ | |
1124 | static void igbvf_irq_enable(struct igbvf_adapter *adapter) | |
1125 | { | |
1126 | struct e1000_hw *hw = &adapter->hw; | |
1127 | ||
1128 | ew32(EIAC, adapter->eims_enable_mask); | |
1129 | ew32(EIAM, adapter->eims_enable_mask); | |
1130 | ew32(EIMS, adapter->eims_enable_mask); | |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * igbvf_poll - NAPI Rx polling callback | |
1135 | * @napi: struct associated with this polling callback | |
1136 | * @budget: amount of packets driver is allowed to process this poll | |
1137 | **/ | |
1138 | static int igbvf_poll(struct napi_struct *napi, int budget) | |
1139 | { | |
1140 | struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); | |
1141 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
1142 | struct e1000_hw *hw = &adapter->hw; | |
1143 | int work_done = 0; | |
1144 | ||
1145 | igbvf_clean_rx_irq(adapter, &work_done, budget); | |
1146 | ||
1147 | /* If not enough Rx work done, exit the polling mode */ | |
1148 | if (work_done < budget) { | |
1149 | napi_complete(napi); | |
1150 | ||
1151 | if (adapter->itr_setting & 3) | |
1152 | igbvf_set_itr(adapter); | |
1153 | ||
1154 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1155 | ew32(EIMS, adapter->rx_ring->eims_value); | |
1156 | } | |
1157 | ||
1158 | return work_done; | |
1159 | } | |
1160 | ||
1161 | /** | |
1162 | * igbvf_set_rlpml - set receive large packet maximum length | |
1163 | * @adapter: board private structure | |
1164 | * | |
1165 | * Configure the maximum size of packets that will be received | |
1166 | */ | |
1167 | static void igbvf_set_rlpml(struct igbvf_adapter *adapter) | |
1168 | { | |
1169 | int max_frame_size = adapter->max_frame_size; | |
1170 | struct e1000_hw *hw = &adapter->hw; | |
1171 | ||
1172 | if (adapter->vlgrp) | |
1173 | max_frame_size += VLAN_TAG_SIZE; | |
1174 | ||
1175 | e1000_rlpml_set_vf(hw, max_frame_size); | |
1176 | } | |
1177 | ||
1178 | static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
1179 | { | |
1180 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1181 | struct e1000_hw *hw = &adapter->hw; | |
1182 | ||
1183 | if (hw->mac.ops.set_vfta(hw, vid, true)) | |
1184 | dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); | |
1185 | } | |
1186 | ||
1187 | static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
1188 | { | |
1189 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1190 | struct e1000_hw *hw = &adapter->hw; | |
1191 | ||
1192 | igbvf_irq_disable(adapter); | |
1193 | vlan_group_set_device(adapter->vlgrp, vid, NULL); | |
1194 | ||
1195 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1196 | igbvf_irq_enable(adapter); | |
1197 | ||
1198 | if (hw->mac.ops.set_vfta(hw, vid, false)) | |
1199 | dev_err(&adapter->pdev->dev, | |
1200 | "Failed to remove vlan id %d\n", vid); | |
1201 | } | |
1202 | ||
1203 | static void igbvf_vlan_rx_register(struct net_device *netdev, | |
1204 | struct vlan_group *grp) | |
1205 | { | |
1206 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1207 | ||
1208 | adapter->vlgrp = grp; | |
1209 | } | |
1210 | ||
1211 | static void igbvf_restore_vlan(struct igbvf_adapter *adapter) | |
1212 | { | |
1213 | u16 vid; | |
1214 | ||
1215 | if (!adapter->vlgrp) | |
1216 | return; | |
1217 | ||
b738127d | 1218 | for (vid = 0; vid < VLAN_N_VID; vid++) { |
d4e0fe01 AD |
1219 | if (!vlan_group_get_device(adapter->vlgrp, vid)) |
1220 | continue; | |
1221 | igbvf_vlan_rx_add_vid(adapter->netdev, vid); | |
1222 | } | |
1223 | ||
1224 | igbvf_set_rlpml(adapter); | |
1225 | } | |
1226 | ||
1227 | /** | |
1228 | * igbvf_configure_tx - Configure Transmit Unit after Reset | |
1229 | * @adapter: board private structure | |
1230 | * | |
1231 | * Configure the Tx unit of the MAC after a reset. | |
1232 | **/ | |
1233 | static void igbvf_configure_tx(struct igbvf_adapter *adapter) | |
1234 | { | |
1235 | struct e1000_hw *hw = &adapter->hw; | |
1236 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1237 | u64 tdba; | |
1238 | u32 txdctl, dca_txctrl; | |
1239 | ||
1240 | /* disable transmits */ | |
1241 | txdctl = er32(TXDCTL(0)); | |
1242 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
1243 | msleep(10); | |
1244 | ||
1245 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
1246 | ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); | |
1247 | tdba = tx_ring->dma; | |
8e20ce94 | 1248 | ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); |
d4e0fe01 AD |
1249 | ew32(TDBAH(0), (tdba >> 32)); |
1250 | ew32(TDH(0), 0); | |
1251 | ew32(TDT(0), 0); | |
1252 | tx_ring->head = E1000_TDH(0); | |
1253 | tx_ring->tail = E1000_TDT(0); | |
1254 | ||
1255 | /* Turn off Relaxed Ordering on head write-backs. The writebacks | |
1256 | * MUST be delivered in order or it will completely screw up | |
1257 | * our bookeeping. | |
1258 | */ | |
1259 | dca_txctrl = er32(DCA_TXCTRL(0)); | |
1260 | dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; | |
1261 | ew32(DCA_TXCTRL(0), dca_txctrl); | |
1262 | ||
1263 | /* enable transmits */ | |
1264 | txdctl |= E1000_TXDCTL_QUEUE_ENABLE; | |
1265 | ew32(TXDCTL(0), txdctl); | |
1266 | ||
1267 | /* Setup Transmit Descriptor Settings for eop descriptor */ | |
1268 | adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; | |
1269 | ||
1270 | /* enable Report Status bit */ | |
1271 | adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; | |
d4e0fe01 AD |
1272 | } |
1273 | ||
1274 | /** | |
1275 | * igbvf_setup_srrctl - configure the receive control registers | |
1276 | * @adapter: Board private structure | |
1277 | **/ | |
1278 | static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) | |
1279 | { | |
1280 | struct e1000_hw *hw = &adapter->hw; | |
1281 | u32 srrctl = 0; | |
1282 | ||
1283 | srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | | |
1284 | E1000_SRRCTL_BSIZEHDR_MASK | | |
1285 | E1000_SRRCTL_BSIZEPKT_MASK); | |
1286 | ||
1287 | /* Enable queue drop to avoid head of line blocking */ | |
1288 | srrctl |= E1000_SRRCTL_DROP_EN; | |
1289 | ||
1290 | /* Setup buffer sizes */ | |
1291 | srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> | |
1292 | E1000_SRRCTL_BSIZEPKT_SHIFT; | |
1293 | ||
1294 | if (adapter->rx_buffer_len < 2048) { | |
1295 | adapter->rx_ps_hdr_size = 0; | |
1296 | srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; | |
1297 | } else { | |
1298 | adapter->rx_ps_hdr_size = 128; | |
1299 | srrctl |= adapter->rx_ps_hdr_size << | |
1300 | E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; | |
1301 | srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; | |
1302 | } | |
1303 | ||
1304 | ew32(SRRCTL(0), srrctl); | |
1305 | } | |
1306 | ||
1307 | /** | |
1308 | * igbvf_configure_rx - Configure Receive Unit after Reset | |
1309 | * @adapter: board private structure | |
1310 | * | |
1311 | * Configure the Rx unit of the MAC after a reset. | |
1312 | **/ | |
1313 | static void igbvf_configure_rx(struct igbvf_adapter *adapter) | |
1314 | { | |
1315 | struct e1000_hw *hw = &adapter->hw; | |
1316 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
1317 | u64 rdba; | |
1318 | u32 rdlen, rxdctl; | |
1319 | ||
1320 | /* disable receives */ | |
1321 | rxdctl = er32(RXDCTL(0)); | |
1322 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
1323 | msleep(10); | |
1324 | ||
1325 | rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); | |
1326 | ||
1327 | /* | |
1328 | * Setup the HW Rx Head and Tail Descriptor Pointers and | |
1329 | * the Base and Length of the Rx Descriptor Ring | |
1330 | */ | |
1331 | rdba = rx_ring->dma; | |
8e20ce94 | 1332 | ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); |
d4e0fe01 AD |
1333 | ew32(RDBAH(0), (rdba >> 32)); |
1334 | ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); | |
1335 | rx_ring->head = E1000_RDH(0); | |
1336 | rx_ring->tail = E1000_RDT(0); | |
1337 | ew32(RDH(0), 0); | |
1338 | ew32(RDT(0), 0); | |
1339 | ||
1340 | rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; | |
1341 | rxdctl &= 0xFFF00000; | |
1342 | rxdctl |= IGBVF_RX_PTHRESH; | |
1343 | rxdctl |= IGBVF_RX_HTHRESH << 8; | |
1344 | rxdctl |= IGBVF_RX_WTHRESH << 16; | |
1345 | ||
1346 | igbvf_set_rlpml(adapter); | |
1347 | ||
1348 | /* enable receives */ | |
1349 | ew32(RXDCTL(0), rxdctl); | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * igbvf_set_multi - Multicast and Promiscuous mode set | |
1354 | * @netdev: network interface device structure | |
1355 | * | |
1356 | * The set_multi entry point is called whenever the multicast address | |
1357 | * list or the network interface flags are updated. This routine is | |
1358 | * responsible for configuring the hardware for proper multicast, | |
1359 | * promiscuous mode, and all-multi behavior. | |
1360 | **/ | |
1361 | static void igbvf_set_multi(struct net_device *netdev) | |
1362 | { | |
1363 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1364 | struct e1000_hw *hw = &adapter->hw; | |
22bedad3 | 1365 | struct netdev_hw_addr *ha; |
d4e0fe01 AD |
1366 | u8 *mta_list = NULL; |
1367 | int i; | |
1368 | ||
4cd24eaf JP |
1369 | if (!netdev_mc_empty(netdev)) { |
1370 | mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC); | |
d4e0fe01 AD |
1371 | if (!mta_list) { |
1372 | dev_err(&adapter->pdev->dev, | |
1373 | "failed to allocate multicast filter list\n"); | |
1374 | return; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | /* prepare a packed array of only addresses. */ | |
48e2f183 | 1379 | i = 0; |
22bedad3 JP |
1380 | netdev_for_each_mc_addr(ha, netdev) |
1381 | memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); | |
d4e0fe01 AD |
1382 | |
1383 | hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); | |
1384 | kfree(mta_list); | |
1385 | } | |
1386 | ||
1387 | /** | |
1388 | * igbvf_configure - configure the hardware for Rx and Tx | |
1389 | * @adapter: private board structure | |
1390 | **/ | |
1391 | static void igbvf_configure(struct igbvf_adapter *adapter) | |
1392 | { | |
1393 | igbvf_set_multi(adapter->netdev); | |
1394 | ||
1395 | igbvf_restore_vlan(adapter); | |
1396 | ||
1397 | igbvf_configure_tx(adapter); | |
1398 | igbvf_setup_srrctl(adapter); | |
1399 | igbvf_configure_rx(adapter); | |
1400 | igbvf_alloc_rx_buffers(adapter->rx_ring, | |
1401 | igbvf_desc_unused(adapter->rx_ring)); | |
1402 | } | |
1403 | ||
1404 | /* igbvf_reset - bring the hardware into a known good state | |
1405 | * | |
1406 | * This function boots the hardware and enables some settings that | |
1407 | * require a configuration cycle of the hardware - those cannot be | |
1408 | * set/changed during runtime. After reset the device needs to be | |
1409 | * properly configured for Rx, Tx etc. | |
1410 | */ | |
2d165771 | 1411 | static void igbvf_reset(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1412 | { |
1413 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1414 | struct net_device *netdev = adapter->netdev; | |
1415 | struct e1000_hw *hw = &adapter->hw; | |
1416 | ||
1417 | /* Allow time for pending master requests to run */ | |
1418 | if (mac->ops.reset_hw(hw)) | |
1419 | dev_err(&adapter->pdev->dev, "PF still resetting\n"); | |
1420 | ||
1421 | mac->ops.init_hw(hw); | |
1422 | ||
1423 | if (is_valid_ether_addr(adapter->hw.mac.addr)) { | |
1424 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, | |
1425 | netdev->addr_len); | |
1426 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, | |
1427 | netdev->addr_len); | |
1428 | } | |
72279093 AD |
1429 | |
1430 | adapter->last_reset = jiffies; | |
d4e0fe01 AD |
1431 | } |
1432 | ||
1433 | int igbvf_up(struct igbvf_adapter *adapter) | |
1434 | { | |
1435 | struct e1000_hw *hw = &adapter->hw; | |
1436 | ||
1437 | /* hardware has been reset, we need to reload some things */ | |
1438 | igbvf_configure(adapter); | |
1439 | ||
1440 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1441 | ||
1442 | napi_enable(&adapter->rx_ring->napi); | |
1443 | if (adapter->msix_entries) | |
1444 | igbvf_configure_msix(adapter); | |
1445 | ||
1446 | /* Clear any pending interrupts. */ | |
1447 | er32(EICR); | |
1448 | igbvf_irq_enable(adapter); | |
1449 | ||
1450 | /* start the watchdog */ | |
1451 | hw->mac.get_link_status = 1; | |
1452 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1453 | ||
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | void igbvf_down(struct igbvf_adapter *adapter) | |
1459 | { | |
1460 | struct net_device *netdev = adapter->netdev; | |
1461 | struct e1000_hw *hw = &adapter->hw; | |
1462 | u32 rxdctl, txdctl; | |
1463 | ||
1464 | /* | |
1465 | * signal that we're down so the interrupt handler does not | |
1466 | * reschedule our watchdog timer | |
1467 | */ | |
1468 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1469 | ||
1470 | /* disable receives in the hardware */ | |
1471 | rxdctl = er32(RXDCTL(0)); | |
1472 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
1473 | ||
1474 | netif_stop_queue(netdev); | |
1475 | ||
1476 | /* disable transmits in the hardware */ | |
1477 | txdctl = er32(TXDCTL(0)); | |
1478 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
1479 | ||
1480 | /* flush both disables and wait for them to finish */ | |
1481 | e1e_flush(); | |
1482 | msleep(10); | |
1483 | ||
1484 | napi_disable(&adapter->rx_ring->napi); | |
1485 | ||
1486 | igbvf_irq_disable(adapter); | |
1487 | ||
1488 | del_timer_sync(&adapter->watchdog_timer); | |
1489 | ||
d4e0fe01 AD |
1490 | netif_carrier_off(netdev); |
1491 | ||
1492 | /* record the stats before reset*/ | |
1493 | igbvf_update_stats(adapter); | |
1494 | ||
1495 | adapter->link_speed = 0; | |
1496 | adapter->link_duplex = 0; | |
1497 | ||
1498 | igbvf_reset(adapter); | |
1499 | igbvf_clean_tx_ring(adapter->tx_ring); | |
1500 | igbvf_clean_rx_ring(adapter->rx_ring); | |
1501 | } | |
1502 | ||
1503 | void igbvf_reinit_locked(struct igbvf_adapter *adapter) | |
1504 | { | |
1505 | might_sleep(); | |
1506 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
1507 | msleep(1); | |
1508 | igbvf_down(adapter); | |
1509 | igbvf_up(adapter); | |
1510 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
1511 | } | |
1512 | ||
1513 | /** | |
1514 | * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) | |
1515 | * @adapter: board private structure to initialize | |
1516 | * | |
1517 | * igbvf_sw_init initializes the Adapter private data structure. | |
1518 | * Fields are initialized based on PCI device information and | |
1519 | * OS network device settings (MTU size). | |
1520 | **/ | |
1521 | static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter) | |
1522 | { | |
1523 | struct net_device *netdev = adapter->netdev; | |
1524 | s32 rc; | |
1525 | ||
1526 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; | |
1527 | adapter->rx_ps_hdr_size = 0; | |
1528 | adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; | |
1529 | adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; | |
1530 | ||
1531 | adapter->tx_int_delay = 8; | |
1532 | adapter->tx_abs_int_delay = 32; | |
1533 | adapter->rx_int_delay = 0; | |
1534 | adapter->rx_abs_int_delay = 8; | |
1535 | adapter->itr_setting = 3; | |
1536 | adapter->itr = 20000; | |
1537 | ||
1538 | /* Set various function pointers */ | |
1539 | adapter->ei->init_ops(&adapter->hw); | |
1540 | ||
1541 | rc = adapter->hw.mac.ops.init_params(&adapter->hw); | |
1542 | if (rc) | |
1543 | return rc; | |
1544 | ||
1545 | rc = adapter->hw.mbx.ops.init_params(&adapter->hw); | |
1546 | if (rc) | |
1547 | return rc; | |
1548 | ||
1549 | igbvf_set_interrupt_capability(adapter); | |
1550 | ||
1551 | if (igbvf_alloc_queues(adapter)) | |
1552 | return -ENOMEM; | |
1553 | ||
1554 | spin_lock_init(&adapter->tx_queue_lock); | |
1555 | ||
1556 | /* Explicitly disable IRQ since the NIC can be in any state. */ | |
1557 | igbvf_irq_disable(adapter); | |
1558 | ||
1559 | spin_lock_init(&adapter->stats_lock); | |
1560 | ||
1561 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) | |
1566 | { | |
1567 | struct e1000_hw *hw = &adapter->hw; | |
1568 | ||
1569 | adapter->stats.last_gprc = er32(VFGPRC); | |
1570 | adapter->stats.last_gorc = er32(VFGORC); | |
1571 | adapter->stats.last_gptc = er32(VFGPTC); | |
1572 | adapter->stats.last_gotc = er32(VFGOTC); | |
1573 | adapter->stats.last_mprc = er32(VFMPRC); | |
1574 | adapter->stats.last_gotlbc = er32(VFGOTLBC); | |
1575 | adapter->stats.last_gptlbc = er32(VFGPTLBC); | |
1576 | adapter->stats.last_gorlbc = er32(VFGORLBC); | |
1577 | adapter->stats.last_gprlbc = er32(VFGPRLBC); | |
1578 | ||
1579 | adapter->stats.base_gprc = er32(VFGPRC); | |
1580 | adapter->stats.base_gorc = er32(VFGORC); | |
1581 | adapter->stats.base_gptc = er32(VFGPTC); | |
1582 | adapter->stats.base_gotc = er32(VFGOTC); | |
1583 | adapter->stats.base_mprc = er32(VFMPRC); | |
1584 | adapter->stats.base_gotlbc = er32(VFGOTLBC); | |
1585 | adapter->stats.base_gptlbc = er32(VFGPTLBC); | |
1586 | adapter->stats.base_gorlbc = er32(VFGORLBC); | |
1587 | adapter->stats.base_gprlbc = er32(VFGPRLBC); | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * igbvf_open - Called when a network interface is made active | |
1592 | * @netdev: network interface device structure | |
1593 | * | |
1594 | * Returns 0 on success, negative value on failure | |
1595 | * | |
1596 | * The open entry point is called when a network interface is made | |
1597 | * active by the system (IFF_UP). At this point all resources needed | |
1598 | * for transmit and receive operations are allocated, the interrupt | |
1599 | * handler is registered with the OS, the watchdog timer is started, | |
1600 | * and the stack is notified that the interface is ready. | |
1601 | **/ | |
1602 | static int igbvf_open(struct net_device *netdev) | |
1603 | { | |
1604 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1605 | struct e1000_hw *hw = &adapter->hw; | |
1606 | int err; | |
1607 | ||
1608 | /* disallow open during test */ | |
1609 | if (test_bit(__IGBVF_TESTING, &adapter->state)) | |
1610 | return -EBUSY; | |
1611 | ||
1612 | /* allocate transmit descriptors */ | |
1613 | err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); | |
1614 | if (err) | |
1615 | goto err_setup_tx; | |
1616 | ||
1617 | /* allocate receive descriptors */ | |
1618 | err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); | |
1619 | if (err) | |
1620 | goto err_setup_rx; | |
1621 | ||
1622 | /* | |
1623 | * before we allocate an interrupt, we must be ready to handle it. | |
1624 | * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt | |
1625 | * as soon as we call pci_request_irq, so we have to setup our | |
1626 | * clean_rx handler before we do so. | |
1627 | */ | |
1628 | igbvf_configure(adapter); | |
1629 | ||
1630 | err = igbvf_request_irq(adapter); | |
1631 | if (err) | |
1632 | goto err_req_irq; | |
1633 | ||
1634 | /* From here on the code is the same as igbvf_up() */ | |
1635 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1636 | ||
1637 | napi_enable(&adapter->rx_ring->napi); | |
1638 | ||
1639 | /* clear any pending interrupts */ | |
1640 | er32(EICR); | |
1641 | ||
1642 | igbvf_irq_enable(adapter); | |
1643 | ||
1644 | /* start the watchdog */ | |
1645 | hw->mac.get_link_status = 1; | |
1646 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1647 | ||
1648 | return 0; | |
1649 | ||
1650 | err_req_irq: | |
1651 | igbvf_free_rx_resources(adapter->rx_ring); | |
1652 | err_setup_rx: | |
1653 | igbvf_free_tx_resources(adapter->tx_ring); | |
1654 | err_setup_tx: | |
1655 | igbvf_reset(adapter); | |
1656 | ||
1657 | return err; | |
1658 | } | |
1659 | ||
1660 | /** | |
1661 | * igbvf_close - Disables a network interface | |
1662 | * @netdev: network interface device structure | |
1663 | * | |
1664 | * Returns 0, this is not allowed to fail | |
1665 | * | |
1666 | * The close entry point is called when an interface is de-activated | |
1667 | * by the OS. The hardware is still under the drivers control, but | |
1668 | * needs to be disabled. A global MAC reset is issued to stop the | |
1669 | * hardware, and all transmit and receive resources are freed. | |
1670 | **/ | |
1671 | static int igbvf_close(struct net_device *netdev) | |
1672 | { | |
1673 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1674 | ||
1675 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
1676 | igbvf_down(adapter); | |
1677 | ||
1678 | igbvf_free_irq(adapter); | |
1679 | ||
1680 | igbvf_free_tx_resources(adapter->tx_ring); | |
1681 | igbvf_free_rx_resources(adapter->rx_ring); | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | /** | |
1686 | * igbvf_set_mac - Change the Ethernet Address of the NIC | |
1687 | * @netdev: network interface device structure | |
1688 | * @p: pointer to an address structure | |
1689 | * | |
1690 | * Returns 0 on success, negative on failure | |
1691 | **/ | |
1692 | static int igbvf_set_mac(struct net_device *netdev, void *p) | |
1693 | { | |
1694 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1695 | struct e1000_hw *hw = &adapter->hw; | |
1696 | struct sockaddr *addr = p; | |
1697 | ||
1698 | if (!is_valid_ether_addr(addr->sa_data)) | |
1699 | return -EADDRNOTAVAIL; | |
1700 | ||
1701 | memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); | |
1702 | ||
1703 | hw->mac.ops.rar_set(hw, hw->mac.addr, 0); | |
1704 | ||
1705 | if (memcmp(addr->sa_data, hw->mac.addr, 6)) | |
1706 | return -EADDRNOTAVAIL; | |
1707 | ||
1708 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | #define UPDATE_VF_COUNTER(reg, name) \ | |
1714 | { \ | |
1715 | u32 current_counter = er32(reg); \ | |
1716 | if (current_counter < adapter->stats.last_##name) \ | |
1717 | adapter->stats.name += 0x100000000LL; \ | |
1718 | adapter->stats.last_##name = current_counter; \ | |
1719 | adapter->stats.name &= 0xFFFFFFFF00000000LL; \ | |
1720 | adapter->stats.name |= current_counter; \ | |
1721 | } | |
1722 | ||
1723 | /** | |
1724 | * igbvf_update_stats - Update the board statistics counters | |
1725 | * @adapter: board private structure | |
1726 | **/ | |
1727 | void igbvf_update_stats(struct igbvf_adapter *adapter) | |
1728 | { | |
1729 | struct e1000_hw *hw = &adapter->hw; | |
1730 | struct pci_dev *pdev = adapter->pdev; | |
1731 | ||
1732 | /* | |
1733 | * Prevent stats update while adapter is being reset, link is down | |
1734 | * or if the pci connection is down. | |
1735 | */ | |
1736 | if (adapter->link_speed == 0) | |
1737 | return; | |
1738 | ||
1739 | if (test_bit(__IGBVF_RESETTING, &adapter->state)) | |
1740 | return; | |
1741 | ||
1742 | if (pci_channel_offline(pdev)) | |
1743 | return; | |
1744 | ||
1745 | UPDATE_VF_COUNTER(VFGPRC, gprc); | |
1746 | UPDATE_VF_COUNTER(VFGORC, gorc); | |
1747 | UPDATE_VF_COUNTER(VFGPTC, gptc); | |
1748 | UPDATE_VF_COUNTER(VFGOTC, gotc); | |
1749 | UPDATE_VF_COUNTER(VFMPRC, mprc); | |
1750 | UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); | |
1751 | UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); | |
1752 | UPDATE_VF_COUNTER(VFGORLBC, gorlbc); | |
1753 | UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); | |
1754 | ||
1755 | /* Fill out the OS statistics structure */ | |
1756 | adapter->net_stats.multicast = adapter->stats.mprc; | |
1757 | } | |
1758 | ||
1759 | static void igbvf_print_link_info(struct igbvf_adapter *adapter) | |
1760 | { | |
1761 | dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n", | |
1762 | adapter->link_speed, | |
1763 | ((adapter->link_duplex == FULL_DUPLEX) ? | |
1764 | "Full Duplex" : "Half Duplex")); | |
1765 | } | |
1766 | ||
1767 | static bool igbvf_has_link(struct igbvf_adapter *adapter) | |
1768 | { | |
1769 | struct e1000_hw *hw = &adapter->hw; | |
1770 | s32 ret_val = E1000_SUCCESS; | |
1771 | bool link_active; | |
1772 | ||
72279093 AD |
1773 | /* If interface is down, stay link down */ |
1774 | if (test_bit(__IGBVF_DOWN, &adapter->state)) | |
1775 | return false; | |
1776 | ||
d4e0fe01 AD |
1777 | ret_val = hw->mac.ops.check_for_link(hw); |
1778 | link_active = !hw->mac.get_link_status; | |
1779 | ||
1780 | /* if check for link returns error we will need to reset */ | |
72279093 | 1781 | if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) |
d4e0fe01 AD |
1782 | schedule_work(&adapter->reset_task); |
1783 | ||
1784 | return link_active; | |
1785 | } | |
1786 | ||
1787 | /** | |
1788 | * igbvf_watchdog - Timer Call-back | |
1789 | * @data: pointer to adapter cast into an unsigned long | |
1790 | **/ | |
1791 | static void igbvf_watchdog(unsigned long data) | |
1792 | { | |
1793 | struct igbvf_adapter *adapter = (struct igbvf_adapter *) data; | |
1794 | ||
1795 | /* Do the rest outside of interrupt context */ | |
1796 | schedule_work(&adapter->watchdog_task); | |
1797 | } | |
1798 | ||
1799 | static void igbvf_watchdog_task(struct work_struct *work) | |
1800 | { | |
1801 | struct igbvf_adapter *adapter = container_of(work, | |
1802 | struct igbvf_adapter, | |
1803 | watchdog_task); | |
1804 | struct net_device *netdev = adapter->netdev; | |
1805 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1806 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1807 | struct e1000_hw *hw = &adapter->hw; | |
1808 | u32 link; | |
1809 | int tx_pending = 0; | |
1810 | ||
1811 | link = igbvf_has_link(adapter); | |
1812 | ||
1813 | if (link) { | |
1814 | if (!netif_carrier_ok(netdev)) { | |
d4e0fe01 AD |
1815 | mac->ops.get_link_up_info(&adapter->hw, |
1816 | &adapter->link_speed, | |
1817 | &adapter->link_duplex); | |
1818 | igbvf_print_link_info(adapter); | |
1819 | ||
d4e0fe01 AD |
1820 | netif_carrier_on(netdev); |
1821 | netif_wake_queue(netdev); | |
1822 | } | |
1823 | } else { | |
1824 | if (netif_carrier_ok(netdev)) { | |
1825 | adapter->link_speed = 0; | |
1826 | adapter->link_duplex = 0; | |
1827 | dev_info(&adapter->pdev->dev, "Link is Down\n"); | |
1828 | netif_carrier_off(netdev); | |
1829 | netif_stop_queue(netdev); | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | if (netif_carrier_ok(netdev)) { | |
1834 | igbvf_update_stats(adapter); | |
1835 | } else { | |
1836 | tx_pending = (igbvf_desc_unused(tx_ring) + 1 < | |
1837 | tx_ring->count); | |
1838 | if (tx_pending) { | |
1839 | /* | |
1840 | * We've lost link, so the controller stops DMA, | |
1841 | * but we've got queued Tx work that's never going | |
1842 | * to get done, so reset controller to flush Tx. | |
1843 | * (Do the reset outside of interrupt context). | |
1844 | */ | |
1845 | adapter->tx_timeout_count++; | |
1846 | schedule_work(&adapter->reset_task); | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | /* Cause software interrupt to ensure Rx ring is cleaned */ | |
1851 | ew32(EICS, adapter->rx_ring->eims_value); | |
1852 | ||
d4e0fe01 AD |
1853 | /* Reset the timer */ |
1854 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1855 | mod_timer(&adapter->watchdog_timer, | |
1856 | round_jiffies(jiffies + (2 * HZ))); | |
1857 | } | |
1858 | ||
1859 | #define IGBVF_TX_FLAGS_CSUM 0x00000001 | |
1860 | #define IGBVF_TX_FLAGS_VLAN 0x00000002 | |
1861 | #define IGBVF_TX_FLAGS_TSO 0x00000004 | |
1862 | #define IGBVF_TX_FLAGS_IPV4 0x00000008 | |
1863 | #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 | |
1864 | #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 | |
1865 | ||
1866 | static int igbvf_tso(struct igbvf_adapter *adapter, | |
1867 | struct igbvf_ring *tx_ring, | |
1868 | struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) | |
1869 | { | |
1870 | struct e1000_adv_tx_context_desc *context_desc; | |
1871 | unsigned int i; | |
1872 | int err; | |
1873 | struct igbvf_buffer *buffer_info; | |
1874 | u32 info = 0, tu_cmd = 0; | |
1875 | u32 mss_l4len_idx, l4len; | |
1876 | *hdr_len = 0; | |
1877 | ||
1878 | if (skb_header_cloned(skb)) { | |
1879 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1880 | if (err) { | |
1881 | dev_err(&adapter->pdev->dev, | |
1882 | "igbvf_tso returning an error\n"); | |
1883 | return err; | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | l4len = tcp_hdrlen(skb); | |
1888 | *hdr_len += l4len; | |
1889 | ||
1890 | if (skb->protocol == htons(ETH_P_IP)) { | |
1891 | struct iphdr *iph = ip_hdr(skb); | |
1892 | iph->tot_len = 0; | |
1893 | iph->check = 0; | |
1894 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, | |
1895 | iph->daddr, 0, | |
1896 | IPPROTO_TCP, | |
1897 | 0); | |
8e1e8a47 | 1898 | } else if (skb_is_gso_v6(skb)) { |
d4e0fe01 AD |
1899 | ipv6_hdr(skb)->payload_len = 0; |
1900 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
1901 | &ipv6_hdr(skb)->daddr, | |
1902 | 0, IPPROTO_TCP, 0); | |
1903 | } | |
1904 | ||
1905 | i = tx_ring->next_to_use; | |
1906 | ||
1907 | buffer_info = &tx_ring->buffer_info[i]; | |
1908 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
1909 | /* VLAN MACLEN IPLEN */ | |
1910 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
1911 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
1912 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
1913 | *hdr_len += skb_network_offset(skb); | |
1914 | info |= (skb_transport_header(skb) - skb_network_header(skb)); | |
1915 | *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); | |
1916 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
1917 | ||
1918 | /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ | |
1919 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
1920 | ||
1921 | if (skb->protocol == htons(ETH_P_IP)) | |
1922 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
1923 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
1924 | ||
1925 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
1926 | ||
1927 | /* MSS L4LEN IDX */ | |
1928 | mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); | |
1929 | mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); | |
1930 | ||
1931 | context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); | |
1932 | context_desc->seqnum_seed = 0; | |
1933 | ||
1934 | buffer_info->time_stamp = jiffies; | |
1935 | buffer_info->next_to_watch = i; | |
1936 | buffer_info->dma = 0; | |
1937 | i++; | |
1938 | if (i == tx_ring->count) | |
1939 | i = 0; | |
1940 | ||
1941 | tx_ring->next_to_use = i; | |
1942 | ||
1943 | return true; | |
1944 | } | |
1945 | ||
1946 | static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, | |
1947 | struct igbvf_ring *tx_ring, | |
1948 | struct sk_buff *skb, u32 tx_flags) | |
1949 | { | |
1950 | struct e1000_adv_tx_context_desc *context_desc; | |
1951 | unsigned int i; | |
1952 | struct igbvf_buffer *buffer_info; | |
1953 | u32 info = 0, tu_cmd = 0; | |
1954 | ||
1955 | if ((skb->ip_summed == CHECKSUM_PARTIAL) || | |
1956 | (tx_flags & IGBVF_TX_FLAGS_VLAN)) { | |
1957 | i = tx_ring->next_to_use; | |
1958 | buffer_info = &tx_ring->buffer_info[i]; | |
1959 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
1960 | ||
1961 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
1962 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
1963 | ||
1964 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
1965 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
1966 | info |= (skb_transport_header(skb) - | |
1967 | skb_network_header(skb)); | |
1968 | ||
1969 | ||
1970 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
1971 | ||
1972 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
1973 | ||
1974 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
1975 | switch (skb->protocol) { | |
1976 | case __constant_htons(ETH_P_IP): | |
1977 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
1978 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
1979 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
1980 | break; | |
1981 | case __constant_htons(ETH_P_IPV6): | |
1982 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
1983 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
1984 | break; | |
1985 | default: | |
1986 | break; | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
1991 | context_desc->seqnum_seed = 0; | |
1992 | context_desc->mss_l4len_idx = 0; | |
1993 | ||
1994 | buffer_info->time_stamp = jiffies; | |
1995 | buffer_info->next_to_watch = i; | |
1996 | buffer_info->dma = 0; | |
1997 | i++; | |
1998 | if (i == tx_ring->count) | |
1999 | i = 0; | |
2000 | tx_ring->next_to_use = i; | |
2001 | ||
2002 | return true; | |
2003 | } | |
2004 | ||
2005 | return false; | |
2006 | } | |
2007 | ||
2008 | static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) | |
2009 | { | |
2010 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2011 | ||
2012 | /* there is enough descriptors then we don't need to worry */ | |
2013 | if (igbvf_desc_unused(adapter->tx_ring) >= size) | |
2014 | return 0; | |
2015 | ||
2016 | netif_stop_queue(netdev); | |
2017 | ||
2018 | smp_mb(); | |
2019 | ||
2020 | /* We need to check again just in case room has been made available */ | |
2021 | if (igbvf_desc_unused(adapter->tx_ring) < size) | |
2022 | return -EBUSY; | |
2023 | ||
2024 | netif_wake_queue(netdev); | |
2025 | ||
2026 | ++adapter->restart_queue; | |
2027 | return 0; | |
2028 | } | |
2029 | ||
2030 | #define IGBVF_MAX_TXD_PWR 16 | |
2031 | #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) | |
2032 | ||
2033 | static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, | |
2034 | struct igbvf_ring *tx_ring, | |
2035 | struct sk_buff *skb, | |
2036 | unsigned int first) | |
2037 | { | |
2038 | struct igbvf_buffer *buffer_info; | |
a7d5ca40 | 2039 | struct pci_dev *pdev = adapter->pdev; |
d4e0fe01 AD |
2040 | unsigned int len = skb_headlen(skb); |
2041 | unsigned int count = 0, i; | |
2042 | unsigned int f; | |
d4e0fe01 AD |
2043 | |
2044 | i = tx_ring->next_to_use; | |
2045 | ||
d4e0fe01 AD |
2046 | buffer_info = &tx_ring->buffer_info[i]; |
2047 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2048 | buffer_info->length = len; | |
2049 | /* set time_stamp *before* dma to help avoid a possible race */ | |
2050 | buffer_info->time_stamp = jiffies; | |
2051 | buffer_info->next_to_watch = i; | |
ac26d7d6 | 2052 | buffer_info->mapped_as_page = false; |
123e9f1a NN |
2053 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, |
2054 | DMA_TO_DEVICE); | |
2055 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
a7d5ca40 AD |
2056 | goto dma_error; |
2057 | ||
d4e0fe01 AD |
2058 | |
2059 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { | |
2060 | struct skb_frag_struct *frag; | |
2061 | ||
8581145f | 2062 | count++; |
d4e0fe01 AD |
2063 | i++; |
2064 | if (i == tx_ring->count) | |
2065 | i = 0; | |
2066 | ||
2067 | frag = &skb_shinfo(skb)->frags[f]; | |
2068 | len = frag->size; | |
2069 | ||
2070 | buffer_info = &tx_ring->buffer_info[i]; | |
2071 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2072 | buffer_info->length = len; | |
2073 | buffer_info->time_stamp = jiffies; | |
2074 | buffer_info->next_to_watch = i; | |
a7d5ca40 | 2075 | buffer_info->mapped_as_page = true; |
123e9f1a | 2076 | buffer_info->dma = dma_map_page(&pdev->dev, |
a7d5ca40 AD |
2077 | frag->page, |
2078 | frag->page_offset, | |
2079 | len, | |
123e9f1a NN |
2080 | DMA_TO_DEVICE); |
2081 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
a7d5ca40 | 2082 | goto dma_error; |
d4e0fe01 AD |
2083 | } |
2084 | ||
2085 | tx_ring->buffer_info[i].skb = skb; | |
2086 | tx_ring->buffer_info[first].next_to_watch = i; | |
2087 | ||
a7d5ca40 AD |
2088 | return ++count; |
2089 | ||
2090 | dma_error: | |
2091 | dev_err(&pdev->dev, "TX DMA map failed\n"); | |
2092 | ||
2093 | /* clear timestamp and dma mappings for failed buffer_info mapping */ | |
2094 | buffer_info->dma = 0; | |
2095 | buffer_info->time_stamp = 0; | |
2096 | buffer_info->length = 0; | |
2097 | buffer_info->next_to_watch = 0; | |
2098 | buffer_info->mapped_as_page = false; | |
c1fa347f RK |
2099 | if (count) |
2100 | count--; | |
a7d5ca40 AD |
2101 | |
2102 | /* clear timestamp and dma mappings for remaining portion of packet */ | |
c1fa347f RK |
2103 | while (count--) { |
2104 | if (i==0) | |
a7d5ca40 | 2105 | i += tx_ring->count; |
c1fa347f | 2106 | i--; |
a7d5ca40 AD |
2107 | buffer_info = &tx_ring->buffer_info[i]; |
2108 | igbvf_put_txbuf(adapter, buffer_info); | |
2109 | } | |
2110 | ||
2111 | return 0; | |
d4e0fe01 AD |
2112 | } |
2113 | ||
2114 | static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, | |
2115 | struct igbvf_ring *tx_ring, | |
2116 | int tx_flags, int count, u32 paylen, | |
2117 | u8 hdr_len) | |
2118 | { | |
2119 | union e1000_adv_tx_desc *tx_desc = NULL; | |
2120 | struct igbvf_buffer *buffer_info; | |
2121 | u32 olinfo_status = 0, cmd_type_len; | |
2122 | unsigned int i; | |
2123 | ||
2124 | cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | | |
2125 | E1000_ADVTXD_DCMD_DEXT); | |
2126 | ||
2127 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
2128 | cmd_type_len |= E1000_ADVTXD_DCMD_VLE; | |
2129 | ||
2130 | if (tx_flags & IGBVF_TX_FLAGS_TSO) { | |
2131 | cmd_type_len |= E1000_ADVTXD_DCMD_TSE; | |
2132 | ||
2133 | /* insert tcp checksum */ | |
2134 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2135 | ||
2136 | /* insert ip checksum */ | |
2137 | if (tx_flags & IGBVF_TX_FLAGS_IPV4) | |
2138 | olinfo_status |= E1000_TXD_POPTS_IXSM << 8; | |
2139 | ||
2140 | } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { | |
2141 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2142 | } | |
2143 | ||
2144 | olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); | |
2145 | ||
2146 | i = tx_ring->next_to_use; | |
2147 | while (count--) { | |
2148 | buffer_info = &tx_ring->buffer_info[i]; | |
2149 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
2150 | tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); | |
2151 | tx_desc->read.cmd_type_len = | |
2152 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
2153 | tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); | |
2154 | i++; | |
2155 | if (i == tx_ring->count) | |
2156 | i = 0; | |
2157 | } | |
2158 | ||
2159 | tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); | |
2160 | /* Force memory writes to complete before letting h/w | |
2161 | * know there are new descriptors to fetch. (Only | |
2162 | * applicable for weak-ordered memory model archs, | |
2163 | * such as IA-64). */ | |
2164 | wmb(); | |
2165 | ||
2166 | tx_ring->next_to_use = i; | |
2167 | writel(i, adapter->hw.hw_addr + tx_ring->tail); | |
2168 | /* we need this if more than one processor can write to our tail | |
2169 | * at a time, it syncronizes IO on IA64/Altix systems */ | |
2170 | mmiowb(); | |
2171 | } | |
2172 | ||
3b29a56d SH |
2173 | static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, |
2174 | struct net_device *netdev, | |
2175 | struct igbvf_ring *tx_ring) | |
d4e0fe01 AD |
2176 | { |
2177 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2178 | unsigned int first, tx_flags = 0; | |
2179 | u8 hdr_len = 0; | |
2180 | int count = 0; | |
2181 | int tso = 0; | |
2182 | ||
2183 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2184 | dev_kfree_skb_any(skb); | |
2185 | return NETDEV_TX_OK; | |
2186 | } | |
2187 | ||
2188 | if (skb->len <= 0) { | |
2189 | dev_kfree_skb_any(skb); | |
2190 | return NETDEV_TX_OK; | |
2191 | } | |
2192 | ||
2193 | /* | |
2194 | * need: count + 4 desc gap to keep tail from touching | |
2195 | * + 2 desc gap to keep tail from touching head, | |
2196 | * + 1 desc for skb->data, | |
2197 | * + 1 desc for context descriptor, | |
2198 | * head, otherwise try next time | |
2199 | */ | |
2200 | if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { | |
2201 | /* this is a hard error */ | |
2202 | return NETDEV_TX_BUSY; | |
2203 | } | |
2204 | ||
2205 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { | |
2206 | tx_flags |= IGBVF_TX_FLAGS_VLAN; | |
2207 | tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); | |
2208 | } | |
2209 | ||
2210 | if (skb->protocol == htons(ETH_P_IP)) | |
2211 | tx_flags |= IGBVF_TX_FLAGS_IPV4; | |
2212 | ||
2213 | first = tx_ring->next_to_use; | |
2214 | ||
2215 | tso = skb_is_gso(skb) ? | |
2216 | igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; | |
2217 | if (unlikely(tso < 0)) { | |
2218 | dev_kfree_skb_any(skb); | |
2219 | return NETDEV_TX_OK; | |
2220 | } | |
2221 | ||
2222 | if (tso) | |
2223 | tx_flags |= IGBVF_TX_FLAGS_TSO; | |
2224 | else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && | |
2225 | (skb->ip_summed == CHECKSUM_PARTIAL)) | |
2226 | tx_flags |= IGBVF_TX_FLAGS_CSUM; | |
2227 | ||
2228 | /* | |
2229 | * count reflects descriptors mapped, if 0 then mapping error | |
25985edc | 2230 | * has occurred and we need to rewind the descriptor queue |
d4e0fe01 AD |
2231 | */ |
2232 | count = igbvf_tx_map_adv(adapter, tx_ring, skb, first); | |
2233 | ||
2234 | if (count) { | |
2235 | igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, | |
2236 | skb->len, hdr_len); | |
d4e0fe01 AD |
2237 | /* Make sure there is space in the ring for the next send. */ |
2238 | igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); | |
2239 | } else { | |
2240 | dev_kfree_skb_any(skb); | |
2241 | tx_ring->buffer_info[first].time_stamp = 0; | |
2242 | tx_ring->next_to_use = first; | |
2243 | } | |
2244 | ||
2245 | return NETDEV_TX_OK; | |
2246 | } | |
2247 | ||
3b29a56d SH |
2248 | static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, |
2249 | struct net_device *netdev) | |
d4e0fe01 AD |
2250 | { |
2251 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2252 | struct igbvf_ring *tx_ring; | |
d4e0fe01 AD |
2253 | |
2254 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2255 | dev_kfree_skb_any(skb); | |
2256 | return NETDEV_TX_OK; | |
2257 | } | |
2258 | ||
2259 | tx_ring = &adapter->tx_ring[0]; | |
2260 | ||
3b29a56d | 2261 | return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); |
d4e0fe01 AD |
2262 | } |
2263 | ||
2264 | /** | |
2265 | * igbvf_tx_timeout - Respond to a Tx Hang | |
2266 | * @netdev: network interface device structure | |
2267 | **/ | |
2268 | static void igbvf_tx_timeout(struct net_device *netdev) | |
2269 | { | |
2270 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2271 | ||
2272 | /* Do the reset outside of interrupt context */ | |
2273 | adapter->tx_timeout_count++; | |
2274 | schedule_work(&adapter->reset_task); | |
2275 | } | |
2276 | ||
2277 | static void igbvf_reset_task(struct work_struct *work) | |
2278 | { | |
2279 | struct igbvf_adapter *adapter; | |
2280 | adapter = container_of(work, struct igbvf_adapter, reset_task); | |
2281 | ||
2282 | igbvf_reinit_locked(adapter); | |
2283 | } | |
2284 | ||
2285 | /** | |
2286 | * igbvf_get_stats - Get System Network Statistics | |
2287 | * @netdev: network interface device structure | |
2288 | * | |
2289 | * Returns the address of the device statistics structure. | |
2290 | * The statistics are actually updated from the timer callback. | |
2291 | **/ | |
2292 | static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) | |
2293 | { | |
2294 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2295 | ||
2296 | /* only return the current stats */ | |
2297 | return &adapter->net_stats; | |
2298 | } | |
2299 | ||
2300 | /** | |
2301 | * igbvf_change_mtu - Change the Maximum Transfer Unit | |
2302 | * @netdev: network interface device structure | |
2303 | * @new_mtu: new value for maximum frame size | |
2304 | * | |
2305 | * Returns 0 on success, negative on failure | |
2306 | **/ | |
2307 | static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) | |
2308 | { | |
2309 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2310 | int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; | |
2311 | ||
2312 | if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { | |
2313 | dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); | |
2314 | return -EINVAL; | |
2315 | } | |
2316 | ||
d4e0fe01 AD |
2317 | #define MAX_STD_JUMBO_FRAME_SIZE 9234 |
2318 | if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { | |
2319 | dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); | |
2320 | return -EINVAL; | |
2321 | } | |
2322 | ||
2323 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
2324 | msleep(1); | |
2325 | /* igbvf_down has a dependency on max_frame_size */ | |
2326 | adapter->max_frame_size = max_frame; | |
2327 | if (netif_running(netdev)) | |
2328 | igbvf_down(adapter); | |
2329 | ||
2330 | /* | |
2331 | * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN | |
2332 | * means we reserve 2 more, this pushes us to allocate from the next | |
2333 | * larger slab size. | |
2334 | * i.e. RXBUFFER_2048 --> size-4096 slab | |
2335 | * However with the new *_jumbo_rx* routines, jumbo receives will use | |
2336 | * fragmented skbs | |
2337 | */ | |
2338 | ||
2339 | if (max_frame <= 1024) | |
2340 | adapter->rx_buffer_len = 1024; | |
2341 | else if (max_frame <= 2048) | |
2342 | adapter->rx_buffer_len = 2048; | |
2343 | else | |
2344 | #if (PAGE_SIZE / 2) > 16384 | |
2345 | adapter->rx_buffer_len = 16384; | |
2346 | #else | |
2347 | adapter->rx_buffer_len = PAGE_SIZE / 2; | |
2348 | #endif | |
2349 | ||
2350 | ||
2351 | /* adjust allocation if LPE protects us, and we aren't using SBP */ | |
2352 | if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || | |
2353 | (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) | |
2354 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + | |
2355 | ETH_FCS_LEN; | |
2356 | ||
2357 | dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", | |
2358 | netdev->mtu, new_mtu); | |
2359 | netdev->mtu = new_mtu; | |
2360 | ||
2361 | if (netif_running(netdev)) | |
2362 | igbvf_up(adapter); | |
2363 | else | |
2364 | igbvf_reset(adapter); | |
2365 | ||
2366 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
2367 | ||
2368 | return 0; | |
2369 | } | |
2370 | ||
2371 | static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
2372 | { | |
2373 | switch (cmd) { | |
2374 | default: | |
2375 | return -EOPNOTSUPP; | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) | |
2380 | { | |
2381 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2382 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2383 | #ifdef CONFIG_PM | |
2384 | int retval = 0; | |
2385 | #endif | |
2386 | ||
2387 | netif_device_detach(netdev); | |
2388 | ||
2389 | if (netif_running(netdev)) { | |
2390 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
2391 | igbvf_down(adapter); | |
2392 | igbvf_free_irq(adapter); | |
2393 | } | |
2394 | ||
2395 | #ifdef CONFIG_PM | |
2396 | retval = pci_save_state(pdev); | |
2397 | if (retval) | |
2398 | return retval; | |
2399 | #endif | |
2400 | ||
2401 | pci_disable_device(pdev); | |
2402 | ||
2403 | return 0; | |
2404 | } | |
2405 | ||
2406 | #ifdef CONFIG_PM | |
2407 | static int igbvf_resume(struct pci_dev *pdev) | |
2408 | { | |
2409 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2410 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2411 | u32 err; | |
2412 | ||
2413 | pci_restore_state(pdev); | |
2414 | err = pci_enable_device_mem(pdev); | |
2415 | if (err) { | |
2416 | dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); | |
2417 | return err; | |
2418 | } | |
2419 | ||
2420 | pci_set_master(pdev); | |
2421 | ||
2422 | if (netif_running(netdev)) { | |
2423 | err = igbvf_request_irq(adapter); | |
2424 | if (err) | |
2425 | return err; | |
2426 | } | |
2427 | ||
2428 | igbvf_reset(adapter); | |
2429 | ||
2430 | if (netif_running(netdev)) | |
2431 | igbvf_up(adapter); | |
2432 | ||
2433 | netif_device_attach(netdev); | |
2434 | ||
2435 | return 0; | |
2436 | } | |
2437 | #endif | |
2438 | ||
2439 | static void igbvf_shutdown(struct pci_dev *pdev) | |
2440 | { | |
2441 | igbvf_suspend(pdev, PMSG_SUSPEND); | |
2442 | } | |
2443 | ||
2444 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2445 | /* | |
2446 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2447 | * without having to re-enable interrupts. It's not called while | |
2448 | * the interrupt routine is executing. | |
2449 | */ | |
2450 | static void igbvf_netpoll(struct net_device *netdev) | |
2451 | { | |
2452 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2453 | ||
2454 | disable_irq(adapter->pdev->irq); | |
2455 | ||
2456 | igbvf_clean_tx_irq(adapter->tx_ring); | |
2457 | ||
2458 | enable_irq(adapter->pdev->irq); | |
2459 | } | |
2460 | #endif | |
2461 | ||
2462 | /** | |
2463 | * igbvf_io_error_detected - called when PCI error is detected | |
2464 | * @pdev: Pointer to PCI device | |
2465 | * @state: The current pci connection state | |
2466 | * | |
2467 | * This function is called after a PCI bus error affecting | |
2468 | * this device has been detected. | |
2469 | */ | |
2470 | static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, | |
2471 | pci_channel_state_t state) | |
2472 | { | |
2473 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2474 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2475 | ||
2476 | netif_device_detach(netdev); | |
2477 | ||
c06c430d DN |
2478 | if (state == pci_channel_io_perm_failure) |
2479 | return PCI_ERS_RESULT_DISCONNECT; | |
2480 | ||
d4e0fe01 AD |
2481 | if (netif_running(netdev)) |
2482 | igbvf_down(adapter); | |
2483 | pci_disable_device(pdev); | |
2484 | ||
2485 | /* Request a slot slot reset. */ | |
2486 | return PCI_ERS_RESULT_NEED_RESET; | |
2487 | } | |
2488 | ||
2489 | /** | |
2490 | * igbvf_io_slot_reset - called after the pci bus has been reset. | |
2491 | * @pdev: Pointer to PCI device | |
2492 | * | |
2493 | * Restart the card from scratch, as if from a cold-boot. Implementation | |
2494 | * resembles the first-half of the igbvf_resume routine. | |
2495 | */ | |
2496 | static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) | |
2497 | { | |
2498 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2499 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2500 | ||
2501 | if (pci_enable_device_mem(pdev)) { | |
2502 | dev_err(&pdev->dev, | |
2503 | "Cannot re-enable PCI device after reset.\n"); | |
2504 | return PCI_ERS_RESULT_DISCONNECT; | |
2505 | } | |
2506 | pci_set_master(pdev); | |
2507 | ||
2508 | igbvf_reset(adapter); | |
2509 | ||
2510 | return PCI_ERS_RESULT_RECOVERED; | |
2511 | } | |
2512 | ||
2513 | /** | |
2514 | * igbvf_io_resume - called when traffic can start flowing again. | |
2515 | * @pdev: Pointer to PCI device | |
2516 | * | |
2517 | * This callback is called when the error recovery driver tells us that | |
2518 | * its OK to resume normal operation. Implementation resembles the | |
2519 | * second-half of the igbvf_resume routine. | |
2520 | */ | |
2521 | static void igbvf_io_resume(struct pci_dev *pdev) | |
2522 | { | |
2523 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2524 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2525 | ||
2526 | if (netif_running(netdev)) { | |
2527 | if (igbvf_up(adapter)) { | |
2528 | dev_err(&pdev->dev, | |
2529 | "can't bring device back up after reset\n"); | |
2530 | return; | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | netif_device_attach(netdev); | |
2535 | } | |
2536 | ||
2537 | static void igbvf_print_device_info(struct igbvf_adapter *adapter) | |
2538 | { | |
2539 | struct e1000_hw *hw = &adapter->hw; | |
2540 | struct net_device *netdev = adapter->netdev; | |
2541 | struct pci_dev *pdev = adapter->pdev; | |
2542 | ||
2543 | dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); | |
753cdc33 | 2544 | dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr); |
d4e0fe01 AD |
2545 | dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type); |
2546 | } | |
2547 | ||
2548 | static const struct net_device_ops igbvf_netdev_ops = { | |
2549 | .ndo_open = igbvf_open, | |
2550 | .ndo_stop = igbvf_close, | |
2551 | .ndo_start_xmit = igbvf_xmit_frame, | |
2552 | .ndo_get_stats = igbvf_get_stats, | |
2553 | .ndo_set_multicast_list = igbvf_set_multi, | |
2554 | .ndo_set_mac_address = igbvf_set_mac, | |
2555 | .ndo_change_mtu = igbvf_change_mtu, | |
2556 | .ndo_do_ioctl = igbvf_ioctl, | |
2557 | .ndo_tx_timeout = igbvf_tx_timeout, | |
2558 | .ndo_vlan_rx_register = igbvf_vlan_rx_register, | |
2559 | .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, | |
2560 | .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, | |
2561 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2562 | .ndo_poll_controller = igbvf_netpoll, | |
2563 | #endif | |
2564 | }; | |
2565 | ||
2566 | /** | |
2567 | * igbvf_probe - Device Initialization Routine | |
2568 | * @pdev: PCI device information struct | |
2569 | * @ent: entry in igbvf_pci_tbl | |
2570 | * | |
2571 | * Returns 0 on success, negative on failure | |
2572 | * | |
2573 | * igbvf_probe initializes an adapter identified by a pci_dev structure. | |
2574 | * The OS initialization, configuring of the adapter private structure, | |
2575 | * and a hardware reset occur. | |
2576 | **/ | |
2577 | static int __devinit igbvf_probe(struct pci_dev *pdev, | |
2578 | const struct pci_device_id *ent) | |
2579 | { | |
2580 | struct net_device *netdev; | |
2581 | struct igbvf_adapter *adapter; | |
2582 | struct e1000_hw *hw; | |
2583 | const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; | |
2584 | ||
2585 | static int cards_found; | |
2586 | int err, pci_using_dac; | |
2587 | ||
2588 | err = pci_enable_device_mem(pdev); | |
2589 | if (err) | |
2590 | return err; | |
2591 | ||
2592 | pci_using_dac = 0; | |
123e9f1a | 2593 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); |
d4e0fe01 | 2594 | if (!err) { |
123e9f1a | 2595 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
d4e0fe01 AD |
2596 | if (!err) |
2597 | pci_using_dac = 1; | |
2598 | } else { | |
123e9f1a | 2599 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
d4e0fe01 | 2600 | if (err) { |
123e9f1a NN |
2601 | err = dma_set_coherent_mask(&pdev->dev, |
2602 | DMA_BIT_MASK(32)); | |
d4e0fe01 AD |
2603 | if (err) { |
2604 | dev_err(&pdev->dev, "No usable DMA " | |
2605 | "configuration, aborting\n"); | |
2606 | goto err_dma; | |
2607 | } | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | err = pci_request_regions(pdev, igbvf_driver_name); | |
2612 | if (err) | |
2613 | goto err_pci_reg; | |
2614 | ||
2615 | pci_set_master(pdev); | |
2616 | ||
2617 | err = -ENOMEM; | |
2618 | netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); | |
2619 | if (!netdev) | |
2620 | goto err_alloc_etherdev; | |
2621 | ||
2622 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2623 | ||
2624 | pci_set_drvdata(pdev, netdev); | |
2625 | adapter = netdev_priv(netdev); | |
2626 | hw = &adapter->hw; | |
2627 | adapter->netdev = netdev; | |
2628 | adapter->pdev = pdev; | |
2629 | adapter->ei = ei; | |
2630 | adapter->pba = ei->pba; | |
2631 | adapter->flags = ei->flags; | |
2632 | adapter->hw.back = adapter; | |
2633 | adapter->hw.mac.type = ei->mac; | |
2634 | adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1; | |
2635 | ||
2636 | /* PCI config space info */ | |
2637 | ||
2638 | hw->vendor_id = pdev->vendor; | |
2639 | hw->device_id = pdev->device; | |
2640 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
2641 | hw->subsystem_device_id = pdev->subsystem_device; | |
ff938e43 | 2642 | hw->revision_id = pdev->revision; |
d4e0fe01 AD |
2643 | |
2644 | err = -EIO; | |
2645 | adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), | |
2646 | pci_resource_len(pdev, 0)); | |
2647 | ||
2648 | if (!adapter->hw.hw_addr) | |
2649 | goto err_ioremap; | |
2650 | ||
2651 | if (ei->get_variants) { | |
2652 | err = ei->get_variants(adapter); | |
2653 | if (err) | |
2654 | goto err_ioremap; | |
2655 | } | |
2656 | ||
2657 | /* setup adapter struct */ | |
2658 | err = igbvf_sw_init(adapter); | |
2659 | if (err) | |
2660 | goto err_sw_init; | |
2661 | ||
2662 | /* construct the net_device struct */ | |
2663 | netdev->netdev_ops = &igbvf_netdev_ops; | |
2664 | ||
2665 | igbvf_set_ethtool_ops(netdev); | |
2666 | netdev->watchdog_timeo = 5 * HZ; | |
2667 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); | |
2668 | ||
2669 | adapter->bd_number = cards_found++; | |
2670 | ||
2671 | netdev->features = NETIF_F_SG | | |
2672 | NETIF_F_IP_CSUM | | |
2673 | NETIF_F_HW_VLAN_TX | | |
2674 | NETIF_F_HW_VLAN_RX | | |
2675 | NETIF_F_HW_VLAN_FILTER; | |
2676 | ||
2677 | netdev->features |= NETIF_F_IPV6_CSUM; | |
2678 | netdev->features |= NETIF_F_TSO; | |
2679 | netdev->features |= NETIF_F_TSO6; | |
2680 | ||
2681 | if (pci_using_dac) | |
2682 | netdev->features |= NETIF_F_HIGHDMA; | |
2683 | ||
2684 | netdev->vlan_features |= NETIF_F_TSO; | |
2685 | netdev->vlan_features |= NETIF_F_TSO6; | |
2686 | netdev->vlan_features |= NETIF_F_IP_CSUM; | |
2687 | netdev->vlan_features |= NETIF_F_IPV6_CSUM; | |
2688 | netdev->vlan_features |= NETIF_F_SG; | |
2689 | ||
2690 | /*reset the controller to put the device in a known good state */ | |
2691 | err = hw->mac.ops.reset_hw(hw); | |
2692 | if (err) { | |
2693 | dev_info(&pdev->dev, | |
1242b6f3 WM |
2694 | "PF still in reset state, assigning new address." |
2695 | " Is the PF interface up?\n"); | |
2c6952df | 2696 | dev_hw_addr_random(adapter->netdev, hw->mac.addr); |
d4e0fe01 AD |
2697 | } else { |
2698 | err = hw->mac.ops.read_mac_addr(hw); | |
2699 | if (err) { | |
2700 | dev_err(&pdev->dev, "Error reading MAC address\n"); | |
2701 | goto err_hw_init; | |
2702 | } | |
2703 | } | |
2704 | ||
2705 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); | |
2706 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); | |
2707 | ||
2708 | if (!is_valid_ether_addr(netdev->perm_addr)) { | |
753cdc33 HS |
2709 | dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", |
2710 | netdev->dev_addr); | |
d4e0fe01 AD |
2711 | err = -EIO; |
2712 | goto err_hw_init; | |
2713 | } | |
2714 | ||
2715 | setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, | |
2716 | (unsigned long) adapter); | |
2717 | ||
2718 | INIT_WORK(&adapter->reset_task, igbvf_reset_task); | |
2719 | INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); | |
2720 | ||
2721 | /* ring size defaults */ | |
2722 | adapter->rx_ring->count = 1024; | |
2723 | adapter->tx_ring->count = 1024; | |
2724 | ||
2725 | /* reset the hardware with the new settings */ | |
2726 | igbvf_reset(adapter); | |
2727 | ||
d4e0fe01 AD |
2728 | strcpy(netdev->name, "eth%d"); |
2729 | err = register_netdev(netdev); | |
2730 | if (err) | |
2731 | goto err_hw_init; | |
2732 | ||
de7fe787 ET |
2733 | /* tell the stack to leave us alone until igbvf_open() is called */ |
2734 | netif_carrier_off(netdev); | |
2735 | netif_stop_queue(netdev); | |
2736 | ||
d4e0fe01 AD |
2737 | igbvf_print_device_info(adapter); |
2738 | ||
2739 | igbvf_initialize_last_counter_stats(adapter); | |
2740 | ||
2741 | return 0; | |
2742 | ||
2743 | err_hw_init: | |
2744 | kfree(adapter->tx_ring); | |
2745 | kfree(adapter->rx_ring); | |
2746 | err_sw_init: | |
2747 | igbvf_reset_interrupt_capability(adapter); | |
2748 | iounmap(adapter->hw.hw_addr); | |
2749 | err_ioremap: | |
2750 | free_netdev(netdev); | |
2751 | err_alloc_etherdev: | |
2752 | pci_release_regions(pdev); | |
2753 | err_pci_reg: | |
2754 | err_dma: | |
2755 | pci_disable_device(pdev); | |
2756 | return err; | |
2757 | } | |
2758 | ||
2759 | /** | |
2760 | * igbvf_remove - Device Removal Routine | |
2761 | * @pdev: PCI device information struct | |
2762 | * | |
2763 | * igbvf_remove is called by the PCI subsystem to alert the driver | |
2764 | * that it should release a PCI device. The could be caused by a | |
2765 | * Hot-Plug event, or because the driver is going to be removed from | |
2766 | * memory. | |
2767 | **/ | |
2768 | static void __devexit igbvf_remove(struct pci_dev *pdev) | |
2769 | { | |
2770 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2771 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2772 | struct e1000_hw *hw = &adapter->hw; | |
2773 | ||
2774 | /* | |
760141a5 TH |
2775 | * The watchdog timer may be rescheduled, so explicitly |
2776 | * disable it from being rescheduled. | |
d4e0fe01 AD |
2777 | */ |
2778 | set_bit(__IGBVF_DOWN, &adapter->state); | |
2779 | del_timer_sync(&adapter->watchdog_timer); | |
2780 | ||
760141a5 TH |
2781 | cancel_work_sync(&adapter->reset_task); |
2782 | cancel_work_sync(&adapter->watchdog_task); | |
d4e0fe01 AD |
2783 | |
2784 | unregister_netdev(netdev); | |
2785 | ||
2786 | igbvf_reset_interrupt_capability(adapter); | |
2787 | ||
2788 | /* | |
2789 | * it is important to delete the napi struct prior to freeing the | |
2790 | * rx ring so that you do not end up with null pointer refs | |
2791 | */ | |
2792 | netif_napi_del(&adapter->rx_ring->napi); | |
2793 | kfree(adapter->tx_ring); | |
2794 | kfree(adapter->rx_ring); | |
2795 | ||
2796 | iounmap(hw->hw_addr); | |
2797 | if (hw->flash_address) | |
2798 | iounmap(hw->flash_address); | |
2799 | pci_release_regions(pdev); | |
2800 | ||
2801 | free_netdev(netdev); | |
2802 | ||
2803 | pci_disable_device(pdev); | |
2804 | } | |
2805 | ||
2806 | /* PCI Error Recovery (ERS) */ | |
2807 | static struct pci_error_handlers igbvf_err_handler = { | |
2808 | .error_detected = igbvf_io_error_detected, | |
2809 | .slot_reset = igbvf_io_slot_reset, | |
2810 | .resume = igbvf_io_resume, | |
2811 | }; | |
2812 | ||
a3aa1884 | 2813 | static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = { |
d4e0fe01 | 2814 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, |
031d7952 | 2815 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf }, |
d4e0fe01 AD |
2816 | { } /* terminate list */ |
2817 | }; | |
2818 | MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); | |
2819 | ||
2820 | /* PCI Device API Driver */ | |
2821 | static struct pci_driver igbvf_driver = { | |
2822 | .name = igbvf_driver_name, | |
2823 | .id_table = igbvf_pci_tbl, | |
2824 | .probe = igbvf_probe, | |
2825 | .remove = __devexit_p(igbvf_remove), | |
2826 | #ifdef CONFIG_PM | |
2827 | /* Power Management Hooks */ | |
2828 | .suspend = igbvf_suspend, | |
2829 | .resume = igbvf_resume, | |
2830 | #endif | |
2831 | .shutdown = igbvf_shutdown, | |
2832 | .err_handler = &igbvf_err_handler | |
2833 | }; | |
2834 | ||
2835 | /** | |
2836 | * igbvf_init_module - Driver Registration Routine | |
2837 | * | |
2838 | * igbvf_init_module is the first routine called when the driver is | |
2839 | * loaded. All it does is register with the PCI subsystem. | |
2840 | **/ | |
2841 | static int __init igbvf_init_module(void) | |
2842 | { | |
2843 | int ret; | |
2844 | printk(KERN_INFO "%s - version %s\n", | |
2845 | igbvf_driver_string, igbvf_driver_version); | |
2846 | printk(KERN_INFO "%s\n", igbvf_copyright); | |
2847 | ||
2848 | ret = pci_register_driver(&igbvf_driver); | |
d4e0fe01 AD |
2849 | |
2850 | return ret; | |
2851 | } | |
2852 | module_init(igbvf_init_module); | |
2853 | ||
2854 | /** | |
2855 | * igbvf_exit_module - Driver Exit Cleanup Routine | |
2856 | * | |
2857 | * igbvf_exit_module is called just before the driver is removed | |
2858 | * from memory. | |
2859 | **/ | |
2860 | static void __exit igbvf_exit_module(void) | |
2861 | { | |
2862 | pci_unregister_driver(&igbvf_driver); | |
d4e0fe01 AD |
2863 | } |
2864 | module_exit(igbvf_exit_module); | |
2865 | ||
2866 | ||
2867 | MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); | |
2868 | MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver"); | |
2869 | MODULE_LICENSE("GPL"); | |
2870 | MODULE_VERSION(DRV_VERSION); | |
2871 | ||
2872 | /* netdev.c */ |