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d4e0fe01 AD |
1 | /******************************************************************************* |
2 | ||
3 | Intel(R) 82576 Virtual Function Linux driver | |
2a06ed92 | 4 | Copyright(c) 2009 - 2012 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 | ||
a4ba8cbe JK |
28 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
29 | ||
d4e0fe01 AD |
30 | #include <linux/module.h> |
31 | #include <linux/types.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/vmalloc.h> | |
35 | #include <linux/pagemap.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/tcp.h> | |
39 | #include <linux/ipv6.h> | |
5a0e3ad6 | 40 | #include <linux/slab.h> |
d4e0fe01 AD |
41 | #include <net/checksum.h> |
42 | #include <net/ip6_checksum.h> | |
43 | #include <linux/mii.h> | |
44 | #include <linux/ethtool.h> | |
45 | #include <linux/if_vlan.h> | |
70c71606 | 46 | #include <linux/prefetch.h> |
d4e0fe01 AD |
47 | |
48 | #include "igbvf.h" | |
49 | ||
76f640f1 | 50 | #define DRV_VERSION "2.0.2-k" |
d4e0fe01 AD |
51 | char igbvf_driver_name[] = "igbvf"; |
52 | const char igbvf_driver_version[] = DRV_VERSION; | |
53 | static const char igbvf_driver_string[] = | |
10090751 | 54 | "Intel(R) Gigabit Virtual Function Network Driver"; |
2c20ebba | 55 | static const char igbvf_copyright[] = |
2a06ed92 | 56 | "Copyright (c) 2009 - 2012 Intel Corporation."; |
d4e0fe01 | 57 | |
b3f4d599 | 58 | #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
59 | static int debug = -1; | |
60 | module_param(debug, int, 0); | |
61 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
62 | ||
d4e0fe01 | 63 | static int igbvf_poll(struct napi_struct *napi, int budget); |
2d165771 AD |
64 | static void igbvf_reset(struct igbvf_adapter *); |
65 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *); | |
66 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *); | |
d4e0fe01 AD |
67 | |
68 | static struct igbvf_info igbvf_vf_info = { | |
69 | .mac = e1000_vfadapt, | |
0364d6fd | 70 | .flags = 0, |
d4e0fe01 AD |
71 | .pba = 10, |
72 | .init_ops = e1000_init_function_pointers_vf, | |
73 | }; | |
74 | ||
031d7952 WM |
75 | static struct igbvf_info igbvf_i350_vf_info = { |
76 | .mac = e1000_vfadapt_i350, | |
77 | .flags = 0, | |
78 | .pba = 10, | |
79 | .init_ops = e1000_init_function_pointers_vf, | |
80 | }; | |
81 | ||
d4e0fe01 AD |
82 | static const struct igbvf_info *igbvf_info_tbl[] = { |
83 | [board_vf] = &igbvf_vf_info, | |
031d7952 | 84 | [board_i350_vf] = &igbvf_i350_vf_info, |
d4e0fe01 AD |
85 | }; |
86 | ||
87 | /** | |
88 | * igbvf_desc_unused - calculate if we have unused descriptors | |
89 | **/ | |
90 | static int igbvf_desc_unused(struct igbvf_ring *ring) | |
91 | { | |
92 | if (ring->next_to_clean > ring->next_to_use) | |
93 | return ring->next_to_clean - ring->next_to_use - 1; | |
94 | ||
95 | return ring->count + ring->next_to_clean - ring->next_to_use - 1; | |
96 | } | |
97 | ||
98 | /** | |
99 | * igbvf_receive_skb - helper function to handle Rx indications | |
100 | * @adapter: board private structure | |
101 | * @status: descriptor status field as written by hardware | |
102 | * @vlan: descriptor vlan field as written by hardware (no le/be conversion) | |
103 | * @skb: pointer to sk_buff to be indicated to stack | |
104 | **/ | |
105 | static void igbvf_receive_skb(struct igbvf_adapter *adapter, | |
106 | struct net_device *netdev, | |
107 | struct sk_buff *skb, | |
108 | u32 status, u16 vlan) | |
109 | { | |
2c1a1019 MW |
110 | u16 vid; |
111 | ||
a0f1d603 | 112 | if (status & E1000_RXD_STAT_VP) { |
2c1a1019 MW |
113 | if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) && |
114 | (status & E1000_RXDEXT_STATERR_LB)) | |
115 | vid = be16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; | |
116 | else | |
117 | vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; | |
4d2d55ac GR |
118 | if (test_bit(vid, adapter->active_vlans)) |
119 | __vlan_hwaccel_put_tag(skb, vid); | |
a0f1d603 | 120 | } |
2c1a1019 MW |
121 | |
122 | napi_gro_receive(&adapter->rx_ring->napi, skb); | |
d4e0fe01 AD |
123 | } |
124 | ||
125 | static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter, | |
126 | u32 status_err, struct sk_buff *skb) | |
127 | { | |
bc8acf2c | 128 | skb_checksum_none_assert(skb); |
d4e0fe01 AD |
129 | |
130 | /* Ignore Checksum bit is set or checksum is disabled through ethtool */ | |
0364d6fd AD |
131 | if ((status_err & E1000_RXD_STAT_IXSM) || |
132 | (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED)) | |
d4e0fe01 | 133 | return; |
0364d6fd | 134 | |
d4e0fe01 AD |
135 | /* TCP/UDP checksum error bit is set */ |
136 | if (status_err & | |
137 | (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) { | |
138 | /* let the stack verify checksum errors */ | |
139 | adapter->hw_csum_err++; | |
140 | return; | |
141 | } | |
0364d6fd | 142 | |
d4e0fe01 AD |
143 | /* It must be a TCP or UDP packet with a valid checksum */ |
144 | if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)) | |
145 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
146 | ||
147 | adapter->hw_csum_good++; | |
148 | } | |
149 | ||
150 | /** | |
151 | * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split | |
152 | * @rx_ring: address of ring structure to repopulate | |
153 | * @cleaned_count: number of buffers to repopulate | |
154 | **/ | |
155 | static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring, | |
156 | int cleaned_count) | |
157 | { | |
158 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
159 | struct net_device *netdev = adapter->netdev; | |
160 | struct pci_dev *pdev = adapter->pdev; | |
161 | union e1000_adv_rx_desc *rx_desc; | |
162 | struct igbvf_buffer *buffer_info; | |
163 | struct sk_buff *skb; | |
164 | unsigned int i; | |
165 | int bufsz; | |
166 | ||
167 | i = rx_ring->next_to_use; | |
168 | buffer_info = &rx_ring->buffer_info[i]; | |
169 | ||
170 | if (adapter->rx_ps_hdr_size) | |
171 | bufsz = adapter->rx_ps_hdr_size; | |
172 | else | |
173 | bufsz = adapter->rx_buffer_len; | |
d4e0fe01 AD |
174 | |
175 | while (cleaned_count--) { | |
176 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
177 | ||
178 | if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) { | |
179 | if (!buffer_info->page) { | |
180 | buffer_info->page = alloc_page(GFP_ATOMIC); | |
181 | if (!buffer_info->page) { | |
182 | adapter->alloc_rx_buff_failed++; | |
183 | goto no_buffers; | |
184 | } | |
185 | buffer_info->page_offset = 0; | |
186 | } else { | |
187 | buffer_info->page_offset ^= PAGE_SIZE / 2; | |
188 | } | |
189 | buffer_info->page_dma = | |
123e9f1a | 190 | dma_map_page(&pdev->dev, buffer_info->page, |
d4e0fe01 AD |
191 | buffer_info->page_offset, |
192 | PAGE_SIZE / 2, | |
123e9f1a | 193 | DMA_FROM_DEVICE); |
91ffb8e0 GR |
194 | if (dma_mapping_error(&pdev->dev, |
195 | buffer_info->page_dma)) { | |
196 | __free_page(buffer_info->page); | |
197 | buffer_info->page = NULL; | |
198 | dev_err(&pdev->dev, "RX DMA map failed\n"); | |
199 | break; | |
200 | } | |
d4e0fe01 AD |
201 | } |
202 | ||
203 | if (!buffer_info->skb) { | |
89d71a66 | 204 | skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
d4e0fe01 AD |
205 | if (!skb) { |
206 | adapter->alloc_rx_buff_failed++; | |
207 | goto no_buffers; | |
208 | } | |
209 | ||
d4e0fe01 | 210 | buffer_info->skb = skb; |
123e9f1a | 211 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, |
d4e0fe01 | 212 | bufsz, |
123e9f1a | 213 | DMA_FROM_DEVICE); |
91ffb8e0 GR |
214 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
215 | dev_kfree_skb(buffer_info->skb); | |
216 | buffer_info->skb = NULL; | |
217 | dev_err(&pdev->dev, "RX DMA map failed\n"); | |
218 | goto no_buffers; | |
219 | } | |
d4e0fe01 AD |
220 | } |
221 | /* Refresh the desc even if buffer_addrs didn't change because | |
222 | * each write-back erases this info. */ | |
223 | if (adapter->rx_ps_hdr_size) { | |
224 | rx_desc->read.pkt_addr = | |
225 | cpu_to_le64(buffer_info->page_dma); | |
226 | rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma); | |
227 | } else { | |
228 | rx_desc->read.pkt_addr = | |
229 | cpu_to_le64(buffer_info->dma); | |
230 | rx_desc->read.hdr_addr = 0; | |
231 | } | |
232 | ||
233 | i++; | |
234 | if (i == rx_ring->count) | |
235 | i = 0; | |
236 | buffer_info = &rx_ring->buffer_info[i]; | |
237 | } | |
238 | ||
239 | no_buffers: | |
240 | if (rx_ring->next_to_use != i) { | |
241 | rx_ring->next_to_use = i; | |
242 | if (i == 0) | |
243 | i = (rx_ring->count - 1); | |
244 | else | |
245 | i--; | |
246 | ||
247 | /* Force memory writes to complete before letting h/w | |
248 | * know there are new descriptors to fetch. (Only | |
249 | * applicable for weak-ordered memory model archs, | |
250 | * such as IA-64). */ | |
251 | wmb(); | |
252 | writel(i, adapter->hw.hw_addr + rx_ring->tail); | |
253 | } | |
254 | } | |
255 | ||
256 | /** | |
257 | * igbvf_clean_rx_irq - Send received data up the network stack; legacy | |
258 | * @adapter: board private structure | |
259 | * | |
260 | * the return value indicates whether actual cleaning was done, there | |
261 | * is no guarantee that everything was cleaned | |
262 | **/ | |
263 | static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter, | |
264 | int *work_done, int work_to_do) | |
265 | { | |
266 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
267 | struct net_device *netdev = adapter->netdev; | |
268 | struct pci_dev *pdev = adapter->pdev; | |
269 | union e1000_adv_rx_desc *rx_desc, *next_rxd; | |
270 | struct igbvf_buffer *buffer_info, *next_buffer; | |
271 | struct sk_buff *skb; | |
272 | bool cleaned = false; | |
273 | int cleaned_count = 0; | |
274 | unsigned int total_bytes = 0, total_packets = 0; | |
275 | unsigned int i; | |
276 | u32 length, hlen, staterr; | |
277 | ||
278 | i = rx_ring->next_to_clean; | |
279 | rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
280 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
281 | ||
282 | while (staterr & E1000_RXD_STAT_DD) { | |
283 | if (*work_done >= work_to_do) | |
284 | break; | |
285 | (*work_done)++; | |
2d0bb1c1 | 286 | rmb(); /* read descriptor and rx_buffer_info after status DD */ |
d4e0fe01 AD |
287 | |
288 | buffer_info = &rx_ring->buffer_info[i]; | |
289 | ||
290 | /* HW will not DMA in data larger than the given buffer, even | |
291 | * if it parses the (NFS, of course) header to be larger. In | |
292 | * that case, it fills the header buffer and spills the rest | |
293 | * into the page. | |
294 | */ | |
295 | hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) & | |
296 | E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT; | |
297 | if (hlen > adapter->rx_ps_hdr_size) | |
298 | hlen = adapter->rx_ps_hdr_size; | |
299 | ||
300 | length = le16_to_cpu(rx_desc->wb.upper.length); | |
301 | cleaned = true; | |
302 | cleaned_count++; | |
303 | ||
304 | skb = buffer_info->skb; | |
305 | prefetch(skb->data - NET_IP_ALIGN); | |
306 | buffer_info->skb = NULL; | |
307 | if (!adapter->rx_ps_hdr_size) { | |
123e9f1a | 308 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 309 | adapter->rx_buffer_len, |
123e9f1a | 310 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
311 | buffer_info->dma = 0; |
312 | skb_put(skb, length); | |
313 | goto send_up; | |
314 | } | |
315 | ||
316 | if (!skb_shinfo(skb)->nr_frags) { | |
123e9f1a | 317 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
92d947b7 | 318 | adapter->rx_ps_hdr_size, |
123e9f1a | 319 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
320 | skb_put(skb, hlen); |
321 | } | |
322 | ||
323 | if (length) { | |
123e9f1a | 324 | dma_unmap_page(&pdev->dev, buffer_info->page_dma, |
d4e0fe01 | 325 | PAGE_SIZE / 2, |
123e9f1a | 326 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
327 | buffer_info->page_dma = 0; |
328 | ||
ec857fd4 | 329 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, |
d4e0fe01 AD |
330 | buffer_info->page, |
331 | buffer_info->page_offset, | |
332 | length); | |
333 | ||
334 | if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) || | |
335 | (page_count(buffer_info->page) != 1)) | |
336 | buffer_info->page = NULL; | |
337 | else | |
338 | get_page(buffer_info->page); | |
339 | ||
340 | skb->len += length; | |
341 | skb->data_len += length; | |
7b8b5961 | 342 | skb->truesize += PAGE_SIZE / 2; |
d4e0fe01 AD |
343 | } |
344 | send_up: | |
345 | i++; | |
346 | if (i == rx_ring->count) | |
347 | i = 0; | |
348 | next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i); | |
349 | prefetch(next_rxd); | |
350 | next_buffer = &rx_ring->buffer_info[i]; | |
351 | ||
352 | if (!(staterr & E1000_RXD_STAT_EOP)) { | |
353 | buffer_info->skb = next_buffer->skb; | |
354 | buffer_info->dma = next_buffer->dma; | |
355 | next_buffer->skb = skb; | |
356 | next_buffer->dma = 0; | |
357 | goto next_desc; | |
358 | } | |
359 | ||
360 | if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) { | |
361 | dev_kfree_skb_irq(skb); | |
362 | goto next_desc; | |
363 | } | |
364 | ||
365 | total_bytes += skb->len; | |
366 | total_packets++; | |
367 | ||
368 | igbvf_rx_checksum_adv(adapter, staterr, skb); | |
369 | ||
370 | skb->protocol = eth_type_trans(skb, netdev); | |
371 | ||
372 | igbvf_receive_skb(adapter, netdev, skb, staterr, | |
373 | rx_desc->wb.upper.vlan); | |
374 | ||
d4e0fe01 AD |
375 | next_desc: |
376 | rx_desc->wb.upper.status_error = 0; | |
377 | ||
378 | /* return some buffers to hardware, one at a time is too slow */ | |
379 | if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) { | |
380 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
381 | cleaned_count = 0; | |
382 | } | |
383 | ||
384 | /* use prefetched values */ | |
385 | rx_desc = next_rxd; | |
386 | buffer_info = next_buffer; | |
387 | ||
388 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
389 | } | |
390 | ||
391 | rx_ring->next_to_clean = i; | |
392 | cleaned_count = igbvf_desc_unused(rx_ring); | |
393 | ||
394 | if (cleaned_count) | |
395 | igbvf_alloc_rx_buffers(rx_ring, cleaned_count); | |
396 | ||
397 | adapter->total_rx_packets += total_packets; | |
398 | adapter->total_rx_bytes += total_bytes; | |
399 | adapter->net_stats.rx_bytes += total_bytes; | |
400 | adapter->net_stats.rx_packets += total_packets; | |
401 | return cleaned; | |
402 | } | |
403 | ||
404 | static void igbvf_put_txbuf(struct igbvf_adapter *adapter, | |
405 | struct igbvf_buffer *buffer_info) | |
406 | { | |
a7d5ca40 AD |
407 | if (buffer_info->dma) { |
408 | if (buffer_info->mapped_as_page) | |
123e9f1a | 409 | dma_unmap_page(&adapter->pdev->dev, |
a7d5ca40 AD |
410 | buffer_info->dma, |
411 | buffer_info->length, | |
123e9f1a | 412 | DMA_TO_DEVICE); |
a7d5ca40 | 413 | else |
123e9f1a | 414 | dma_unmap_single(&adapter->pdev->dev, |
a7d5ca40 AD |
415 | buffer_info->dma, |
416 | buffer_info->length, | |
123e9f1a | 417 | DMA_TO_DEVICE); |
a7d5ca40 AD |
418 | buffer_info->dma = 0; |
419 | } | |
d4e0fe01 | 420 | if (buffer_info->skb) { |
d4e0fe01 AD |
421 | dev_kfree_skb_any(buffer_info->skb); |
422 | buffer_info->skb = NULL; | |
423 | } | |
424 | buffer_info->time_stamp = 0; | |
425 | } | |
426 | ||
d4e0fe01 AD |
427 | /** |
428 | * igbvf_setup_tx_resources - allocate Tx resources (Descriptors) | |
429 | * @adapter: board private structure | |
430 | * | |
431 | * Return 0 on success, negative on failure | |
432 | **/ | |
433 | int igbvf_setup_tx_resources(struct igbvf_adapter *adapter, | |
434 | struct igbvf_ring *tx_ring) | |
435 | { | |
436 | struct pci_dev *pdev = adapter->pdev; | |
437 | int size; | |
438 | ||
439 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
89bf67f1 | 440 | tx_ring->buffer_info = vzalloc(size); |
d4e0fe01 AD |
441 | if (!tx_ring->buffer_info) |
442 | goto err; | |
d4e0fe01 AD |
443 | |
444 | /* round up to nearest 4K */ | |
445 | tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc); | |
446 | tx_ring->size = ALIGN(tx_ring->size, 4096); | |
447 | ||
123e9f1a NN |
448 | tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size, |
449 | &tx_ring->dma, GFP_KERNEL); | |
d4e0fe01 AD |
450 | if (!tx_ring->desc) |
451 | goto err; | |
452 | ||
453 | tx_ring->adapter = adapter; | |
454 | tx_ring->next_to_use = 0; | |
455 | tx_ring->next_to_clean = 0; | |
456 | ||
457 | return 0; | |
458 | err: | |
459 | vfree(tx_ring->buffer_info); | |
460 | dev_err(&adapter->pdev->dev, | |
461 | "Unable to allocate memory for the transmit descriptor ring\n"); | |
462 | return -ENOMEM; | |
463 | } | |
464 | ||
465 | /** | |
466 | * igbvf_setup_rx_resources - allocate Rx resources (Descriptors) | |
467 | * @adapter: board private structure | |
468 | * | |
469 | * Returns 0 on success, negative on failure | |
470 | **/ | |
471 | int igbvf_setup_rx_resources(struct igbvf_adapter *adapter, | |
472 | struct igbvf_ring *rx_ring) | |
473 | { | |
474 | struct pci_dev *pdev = adapter->pdev; | |
475 | int size, desc_len; | |
476 | ||
477 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
89bf67f1 | 478 | rx_ring->buffer_info = vzalloc(size); |
d4e0fe01 AD |
479 | if (!rx_ring->buffer_info) |
480 | goto err; | |
d4e0fe01 AD |
481 | |
482 | desc_len = sizeof(union e1000_adv_rx_desc); | |
483 | ||
484 | /* Round up to nearest 4K */ | |
485 | rx_ring->size = rx_ring->count * desc_len; | |
486 | rx_ring->size = ALIGN(rx_ring->size, 4096); | |
487 | ||
123e9f1a NN |
488 | rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size, |
489 | &rx_ring->dma, GFP_KERNEL); | |
d4e0fe01 AD |
490 | if (!rx_ring->desc) |
491 | goto err; | |
492 | ||
493 | rx_ring->next_to_clean = 0; | |
494 | rx_ring->next_to_use = 0; | |
495 | ||
496 | rx_ring->adapter = adapter; | |
497 | ||
498 | return 0; | |
499 | ||
500 | err: | |
501 | vfree(rx_ring->buffer_info); | |
502 | rx_ring->buffer_info = NULL; | |
503 | dev_err(&adapter->pdev->dev, | |
504 | "Unable to allocate memory for the receive descriptor ring\n"); | |
505 | return -ENOMEM; | |
506 | } | |
507 | ||
508 | /** | |
509 | * igbvf_clean_tx_ring - Free Tx Buffers | |
510 | * @tx_ring: ring to be cleaned | |
511 | **/ | |
512 | static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring) | |
513 | { | |
514 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
515 | struct igbvf_buffer *buffer_info; | |
516 | unsigned long size; | |
517 | unsigned int i; | |
518 | ||
519 | if (!tx_ring->buffer_info) | |
520 | return; | |
521 | ||
522 | /* Free all the Tx ring sk_buffs */ | |
523 | for (i = 0; i < tx_ring->count; i++) { | |
524 | buffer_info = &tx_ring->buffer_info[i]; | |
525 | igbvf_put_txbuf(adapter, buffer_info); | |
526 | } | |
527 | ||
528 | size = sizeof(struct igbvf_buffer) * tx_ring->count; | |
529 | memset(tx_ring->buffer_info, 0, size); | |
530 | ||
531 | /* Zero out the descriptor ring */ | |
532 | memset(tx_ring->desc, 0, tx_ring->size); | |
533 | ||
534 | tx_ring->next_to_use = 0; | |
535 | tx_ring->next_to_clean = 0; | |
536 | ||
537 | writel(0, adapter->hw.hw_addr + tx_ring->head); | |
538 | writel(0, adapter->hw.hw_addr + tx_ring->tail); | |
539 | } | |
540 | ||
541 | /** | |
542 | * igbvf_free_tx_resources - Free Tx Resources per Queue | |
543 | * @tx_ring: ring to free resources from | |
544 | * | |
545 | * Free all transmit software resources | |
546 | **/ | |
547 | void igbvf_free_tx_resources(struct igbvf_ring *tx_ring) | |
548 | { | |
549 | struct pci_dev *pdev = tx_ring->adapter->pdev; | |
550 | ||
551 | igbvf_clean_tx_ring(tx_ring); | |
552 | ||
553 | vfree(tx_ring->buffer_info); | |
554 | tx_ring->buffer_info = NULL; | |
555 | ||
123e9f1a NN |
556 | dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
557 | tx_ring->dma); | |
d4e0fe01 AD |
558 | |
559 | tx_ring->desc = NULL; | |
560 | } | |
561 | ||
562 | /** | |
563 | * igbvf_clean_rx_ring - Free Rx Buffers per Queue | |
564 | * @adapter: board private structure | |
565 | **/ | |
566 | static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring) | |
567 | { | |
568 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
569 | struct igbvf_buffer *buffer_info; | |
570 | struct pci_dev *pdev = adapter->pdev; | |
571 | unsigned long size; | |
572 | unsigned int i; | |
573 | ||
574 | if (!rx_ring->buffer_info) | |
575 | return; | |
576 | ||
577 | /* Free all the Rx ring sk_buffs */ | |
578 | for (i = 0; i < rx_ring->count; i++) { | |
579 | buffer_info = &rx_ring->buffer_info[i]; | |
580 | if (buffer_info->dma) { | |
581 | if (adapter->rx_ps_hdr_size){ | |
123e9f1a | 582 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 583 | adapter->rx_ps_hdr_size, |
123e9f1a | 584 | DMA_FROM_DEVICE); |
d4e0fe01 | 585 | } else { |
123e9f1a | 586 | dma_unmap_single(&pdev->dev, buffer_info->dma, |
d4e0fe01 | 587 | adapter->rx_buffer_len, |
123e9f1a | 588 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
589 | } |
590 | buffer_info->dma = 0; | |
591 | } | |
592 | ||
593 | if (buffer_info->skb) { | |
594 | dev_kfree_skb(buffer_info->skb); | |
595 | buffer_info->skb = NULL; | |
596 | } | |
597 | ||
598 | if (buffer_info->page) { | |
599 | if (buffer_info->page_dma) | |
123e9f1a NN |
600 | dma_unmap_page(&pdev->dev, |
601 | buffer_info->page_dma, | |
d4e0fe01 | 602 | PAGE_SIZE / 2, |
123e9f1a | 603 | DMA_FROM_DEVICE); |
d4e0fe01 AD |
604 | put_page(buffer_info->page); |
605 | buffer_info->page = NULL; | |
606 | buffer_info->page_dma = 0; | |
607 | buffer_info->page_offset = 0; | |
608 | } | |
609 | } | |
610 | ||
611 | size = sizeof(struct igbvf_buffer) * rx_ring->count; | |
612 | memset(rx_ring->buffer_info, 0, size); | |
613 | ||
614 | /* Zero out the descriptor ring */ | |
615 | memset(rx_ring->desc, 0, rx_ring->size); | |
616 | ||
617 | rx_ring->next_to_clean = 0; | |
618 | rx_ring->next_to_use = 0; | |
619 | ||
620 | writel(0, adapter->hw.hw_addr + rx_ring->head); | |
621 | writel(0, adapter->hw.hw_addr + rx_ring->tail); | |
622 | } | |
623 | ||
624 | /** | |
625 | * igbvf_free_rx_resources - Free Rx Resources | |
626 | * @rx_ring: ring to clean the resources from | |
627 | * | |
628 | * Free all receive software resources | |
629 | **/ | |
630 | ||
631 | void igbvf_free_rx_resources(struct igbvf_ring *rx_ring) | |
632 | { | |
633 | struct pci_dev *pdev = rx_ring->adapter->pdev; | |
634 | ||
635 | igbvf_clean_rx_ring(rx_ring); | |
636 | ||
637 | vfree(rx_ring->buffer_info); | |
638 | rx_ring->buffer_info = NULL; | |
639 | ||
640 | dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, | |
641 | rx_ring->dma); | |
642 | rx_ring->desc = NULL; | |
643 | } | |
644 | ||
645 | /** | |
646 | * igbvf_update_itr - update the dynamic ITR value based on statistics | |
647 | * @adapter: pointer to adapter | |
648 | * @itr_setting: current adapter->itr | |
649 | * @packets: the number of packets during this measurement interval | |
650 | * @bytes: the number of bytes during this measurement interval | |
651 | * | |
652 | * Stores a new ITR value based on packets and byte | |
653 | * counts during the last interrupt. The advantage of per interrupt | |
654 | * computation is faster updates and more accurate ITR for the current | |
655 | * traffic pattern. Constants in this function were computed | |
656 | * based on theoretical maximum wire speed and thresholds were set based | |
657 | * on testing data as well as attempting to minimize response time | |
ab50a2a4 | 658 | * while increasing bulk throughput. |
d4e0fe01 | 659 | **/ |
ab50a2a4 MW |
660 | static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter, |
661 | enum latency_range itr_setting, | |
662 | int packets, int bytes) | |
d4e0fe01 | 663 | { |
ab50a2a4 | 664 | enum latency_range retval = itr_setting; |
d4e0fe01 AD |
665 | |
666 | if (packets == 0) | |
667 | goto update_itr_done; | |
668 | ||
669 | switch (itr_setting) { | |
670 | case lowest_latency: | |
671 | /* handle TSO and jumbo frames */ | |
672 | if (bytes/packets > 8000) | |
673 | retval = bulk_latency; | |
674 | else if ((packets < 5) && (bytes > 512)) | |
675 | retval = low_latency; | |
676 | break; | |
677 | case low_latency: /* 50 usec aka 20000 ints/s */ | |
678 | if (bytes > 10000) { | |
679 | /* this if handles the TSO accounting */ | |
680 | if (bytes/packets > 8000) | |
681 | retval = bulk_latency; | |
682 | else if ((packets < 10) || ((bytes/packets) > 1200)) | |
683 | retval = bulk_latency; | |
684 | else if ((packets > 35)) | |
685 | retval = lowest_latency; | |
686 | } else if (bytes/packets > 2000) { | |
687 | retval = bulk_latency; | |
688 | } else if (packets <= 2 && bytes < 512) { | |
689 | retval = lowest_latency; | |
690 | } | |
691 | break; | |
692 | case bulk_latency: /* 250 usec aka 4000 ints/s */ | |
693 | if (bytes > 25000) { | |
694 | if (packets > 35) | |
695 | retval = low_latency; | |
696 | } else if (bytes < 6000) { | |
697 | retval = low_latency; | |
698 | } | |
699 | break; | |
ab50a2a4 MW |
700 | default: |
701 | break; | |
d4e0fe01 AD |
702 | } |
703 | ||
704 | update_itr_done: | |
705 | return retval; | |
706 | } | |
707 | ||
ab50a2a4 | 708 | static int igbvf_range_to_itr(enum latency_range current_range) |
d4e0fe01 | 709 | { |
ab50a2a4 | 710 | int new_itr; |
d4e0fe01 | 711 | |
ab50a2a4 | 712 | switch (current_range) { |
d4e0fe01 AD |
713 | /* counts and packets in update_itr are dependent on these numbers */ |
714 | case lowest_latency: | |
ab50a2a4 | 715 | new_itr = IGBVF_70K_ITR; |
d4e0fe01 AD |
716 | break; |
717 | case low_latency: | |
ab50a2a4 | 718 | new_itr = IGBVF_20K_ITR; |
d4e0fe01 AD |
719 | break; |
720 | case bulk_latency: | |
ab50a2a4 | 721 | new_itr = IGBVF_4K_ITR; |
d4e0fe01 AD |
722 | break; |
723 | default: | |
ab50a2a4 | 724 | new_itr = IGBVF_START_ITR; |
d4e0fe01 AD |
725 | break; |
726 | } | |
ab50a2a4 MW |
727 | return new_itr; |
728 | } | |
729 | ||
730 | static void igbvf_set_itr(struct igbvf_adapter *adapter) | |
731 | { | |
732 | u32 new_itr; | |
733 | ||
734 | adapter->tx_ring->itr_range = | |
735 | igbvf_update_itr(adapter, | |
736 | adapter->tx_ring->itr_val, | |
737 | adapter->total_tx_packets, | |
738 | adapter->total_tx_bytes); | |
739 | ||
740 | /* conservative mode (itr 3) eliminates the lowest_latency setting */ | |
741 | if (adapter->requested_itr == 3 && | |
742 | adapter->tx_ring->itr_range == lowest_latency) | |
743 | adapter->tx_ring->itr_range = low_latency; | |
d4e0fe01 | 744 | |
ab50a2a4 MW |
745 | new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range); |
746 | ||
747 | ||
748 | if (new_itr != adapter->tx_ring->itr_val) { | |
749 | u32 current_itr = adapter->tx_ring->itr_val; | |
d4e0fe01 AD |
750 | /* |
751 | * this attempts to bias the interrupt rate towards Bulk | |
752 | * by adding intermediate steps when interrupt rate is | |
753 | * increasing | |
754 | */ | |
ab50a2a4 MW |
755 | new_itr = new_itr > current_itr ? |
756 | min(current_itr + (new_itr >> 2), new_itr) : | |
757 | new_itr; | |
758 | adapter->tx_ring->itr_val = new_itr; | |
759 | ||
760 | adapter->tx_ring->set_itr = 1; | |
761 | } | |
762 | ||
763 | adapter->rx_ring->itr_range = | |
764 | igbvf_update_itr(adapter, adapter->rx_ring->itr_val, | |
765 | adapter->total_rx_packets, | |
766 | adapter->total_rx_bytes); | |
767 | if (adapter->requested_itr == 3 && | |
768 | adapter->rx_ring->itr_range == lowest_latency) | |
769 | adapter->rx_ring->itr_range = low_latency; | |
770 | ||
771 | new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range); | |
772 | ||
773 | if (new_itr != adapter->rx_ring->itr_val) { | |
774 | u32 current_itr = adapter->rx_ring->itr_val; | |
775 | new_itr = new_itr > current_itr ? | |
776 | min(current_itr + (new_itr >> 2), new_itr) : | |
777 | new_itr; | |
778 | adapter->rx_ring->itr_val = new_itr; | |
779 | ||
780 | adapter->rx_ring->set_itr = 1; | |
d4e0fe01 AD |
781 | } |
782 | } | |
783 | ||
784 | /** | |
785 | * igbvf_clean_tx_irq - Reclaim resources after transmit completes | |
786 | * @adapter: board private structure | |
49ce9c2c | 787 | * |
d4e0fe01 AD |
788 | * returns true if ring is completely cleaned |
789 | **/ | |
790 | static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring) | |
791 | { | |
792 | struct igbvf_adapter *adapter = tx_ring->adapter; | |
d4e0fe01 AD |
793 | struct net_device *netdev = adapter->netdev; |
794 | struct igbvf_buffer *buffer_info; | |
795 | struct sk_buff *skb; | |
796 | union e1000_adv_tx_desc *tx_desc, *eop_desc; | |
797 | unsigned int total_bytes = 0, total_packets = 0; | |
3eb1a40f | 798 | unsigned int i, count = 0; |
d4e0fe01 AD |
799 | bool cleaned = false; |
800 | ||
801 | i = tx_ring->next_to_clean; | |
3eb1a40f AD |
802 | buffer_info = &tx_ring->buffer_info[i]; |
803 | eop_desc = buffer_info->next_to_watch; | |
804 | ||
805 | do { | |
806 | /* if next_to_watch is not set then there is no work pending */ | |
807 | if (!eop_desc) | |
808 | break; | |
809 | ||
810 | /* prevent any other reads prior to eop_desc */ | |
811 | read_barrier_depends(); | |
812 | ||
813 | /* if DD is not set pending work has not been completed */ | |
814 | if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD))) | |
815 | break; | |
816 | ||
817 | /* clear next_to_watch to prevent false hangs */ | |
818 | buffer_info->next_to_watch = NULL; | |
d4e0fe01 | 819 | |
d4e0fe01 AD |
820 | for (cleaned = false; !cleaned; count++) { |
821 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
3eb1a40f | 822 | cleaned = (tx_desc == eop_desc); |
d4e0fe01 AD |
823 | skb = buffer_info->skb; |
824 | ||
825 | if (skb) { | |
826 | unsigned int segs, bytecount; | |
827 | ||
828 | /* gso_segs is currently only valid for tcp */ | |
829 | segs = skb_shinfo(skb)->gso_segs ?: 1; | |
830 | /* multiply data chunks by size of headers */ | |
831 | bytecount = ((segs - 1) * skb_headlen(skb)) + | |
832 | skb->len; | |
833 | total_packets += segs; | |
834 | total_bytes += bytecount; | |
835 | } | |
836 | ||
837 | igbvf_put_txbuf(adapter, buffer_info); | |
838 | tx_desc->wb.status = 0; | |
839 | ||
840 | i++; | |
841 | if (i == tx_ring->count) | |
842 | i = 0; | |
3eb1a40f AD |
843 | |
844 | buffer_info = &tx_ring->buffer_info[i]; | |
d4e0fe01 | 845 | } |
3eb1a40f AD |
846 | |
847 | eop_desc = buffer_info->next_to_watch; | |
848 | } while (count < tx_ring->count); | |
d4e0fe01 AD |
849 | |
850 | tx_ring->next_to_clean = i; | |
851 | ||
852 | if (unlikely(count && | |
853 | netif_carrier_ok(netdev) && | |
854 | igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) { | |
855 | /* Make sure that anybody stopping the queue after this | |
856 | * sees the new next_to_clean. | |
857 | */ | |
858 | smp_mb(); | |
859 | if (netif_queue_stopped(netdev) && | |
860 | !(test_bit(__IGBVF_DOWN, &adapter->state))) { | |
861 | netif_wake_queue(netdev); | |
862 | ++adapter->restart_queue; | |
863 | } | |
864 | } | |
865 | ||
d4e0fe01 AD |
866 | adapter->net_stats.tx_bytes += total_bytes; |
867 | adapter->net_stats.tx_packets += total_packets; | |
807540ba | 868 | return count < tx_ring->count; |
d4e0fe01 AD |
869 | } |
870 | ||
871 | static irqreturn_t igbvf_msix_other(int irq, void *data) | |
872 | { | |
873 | struct net_device *netdev = data; | |
874 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
875 | struct e1000_hw *hw = &adapter->hw; | |
876 | ||
877 | adapter->int_counter1++; | |
878 | ||
879 | netif_carrier_off(netdev); | |
880 | hw->mac.get_link_status = 1; | |
881 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
882 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
883 | ||
884 | ew32(EIMS, adapter->eims_other); | |
885 | ||
886 | return IRQ_HANDLED; | |
887 | } | |
888 | ||
889 | static irqreturn_t igbvf_intr_msix_tx(int irq, void *data) | |
890 | { | |
891 | struct net_device *netdev = data; | |
892 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
893 | struct e1000_hw *hw = &adapter->hw; | |
894 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
895 | ||
ab50a2a4 MW |
896 | if (tx_ring->set_itr) { |
897 | writel(tx_ring->itr_val, | |
898 | adapter->hw.hw_addr + tx_ring->itr_register); | |
899 | adapter->tx_ring->set_itr = 0; | |
900 | } | |
d4e0fe01 AD |
901 | |
902 | adapter->total_tx_bytes = 0; | |
903 | adapter->total_tx_packets = 0; | |
904 | ||
905 | /* auto mask will automatically reenable the interrupt when we write | |
906 | * EICS */ | |
907 | if (!igbvf_clean_tx_irq(tx_ring)) | |
908 | /* Ring was not completely cleaned, so fire another interrupt */ | |
909 | ew32(EICS, tx_ring->eims_value); | |
910 | else | |
911 | ew32(EIMS, tx_ring->eims_value); | |
912 | ||
913 | return IRQ_HANDLED; | |
914 | } | |
915 | ||
916 | static irqreturn_t igbvf_intr_msix_rx(int irq, void *data) | |
917 | { | |
918 | struct net_device *netdev = data; | |
919 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
920 | ||
921 | adapter->int_counter0++; | |
922 | ||
923 | /* Write the ITR value calculated at the end of the | |
924 | * previous interrupt. | |
925 | */ | |
926 | if (adapter->rx_ring->set_itr) { | |
927 | writel(adapter->rx_ring->itr_val, | |
928 | adapter->hw.hw_addr + adapter->rx_ring->itr_register); | |
929 | adapter->rx_ring->set_itr = 0; | |
930 | } | |
931 | ||
932 | if (napi_schedule_prep(&adapter->rx_ring->napi)) { | |
933 | adapter->total_rx_bytes = 0; | |
934 | adapter->total_rx_packets = 0; | |
935 | __napi_schedule(&adapter->rx_ring->napi); | |
936 | } | |
937 | ||
938 | return IRQ_HANDLED; | |
939 | } | |
940 | ||
941 | #define IGBVF_NO_QUEUE -1 | |
942 | ||
943 | static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue, | |
944 | int tx_queue, int msix_vector) | |
945 | { | |
946 | struct e1000_hw *hw = &adapter->hw; | |
947 | u32 ivar, index; | |
948 | ||
949 | /* 82576 uses a table-based method for assigning vectors. | |
950 | Each queue has a single entry in the table to which we write | |
951 | a vector number along with a "valid" bit. Sadly, the layout | |
952 | of the table is somewhat counterintuitive. */ | |
953 | if (rx_queue > IGBVF_NO_QUEUE) { | |
954 | index = (rx_queue >> 1); | |
955 | ivar = array_er32(IVAR0, index); | |
956 | if (rx_queue & 0x1) { | |
957 | /* vector goes into third byte of register */ | |
958 | ivar = ivar & 0xFF00FFFF; | |
959 | ivar |= (msix_vector | E1000_IVAR_VALID) << 16; | |
960 | } else { | |
961 | /* vector goes into low byte of register */ | |
962 | ivar = ivar & 0xFFFFFF00; | |
963 | ivar |= msix_vector | E1000_IVAR_VALID; | |
964 | } | |
965 | adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector; | |
966 | array_ew32(IVAR0, index, ivar); | |
967 | } | |
968 | if (tx_queue > IGBVF_NO_QUEUE) { | |
969 | index = (tx_queue >> 1); | |
970 | ivar = array_er32(IVAR0, index); | |
971 | if (tx_queue & 0x1) { | |
972 | /* vector goes into high byte of register */ | |
973 | ivar = ivar & 0x00FFFFFF; | |
974 | ivar |= (msix_vector | E1000_IVAR_VALID) << 24; | |
975 | } else { | |
976 | /* vector goes into second byte of register */ | |
977 | ivar = ivar & 0xFFFF00FF; | |
978 | ivar |= (msix_vector | E1000_IVAR_VALID) << 8; | |
979 | } | |
980 | adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector; | |
981 | array_ew32(IVAR0, index, ivar); | |
982 | } | |
983 | } | |
984 | ||
985 | /** | |
986 | * igbvf_configure_msix - Configure MSI-X hardware | |
987 | * | |
988 | * igbvf_configure_msix sets up the hardware to properly | |
989 | * generate MSI-X interrupts. | |
990 | **/ | |
991 | static void igbvf_configure_msix(struct igbvf_adapter *adapter) | |
992 | { | |
993 | u32 tmp; | |
994 | struct e1000_hw *hw = &adapter->hw; | |
995 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
996 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
997 | int vector = 0; | |
998 | ||
999 | adapter->eims_enable_mask = 0; | |
1000 | ||
1001 | igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++); | |
1002 | adapter->eims_enable_mask |= tx_ring->eims_value; | |
ab50a2a4 | 1003 | writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register); |
d4e0fe01 AD |
1004 | igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++); |
1005 | adapter->eims_enable_mask |= rx_ring->eims_value; | |
ab50a2a4 | 1006 | writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register); |
d4e0fe01 AD |
1007 | |
1008 | /* set vector for other causes, i.e. link changes */ | |
1009 | ||
1010 | tmp = (vector++ | E1000_IVAR_VALID); | |
1011 | ||
1012 | ew32(IVAR_MISC, tmp); | |
1013 | ||
1014 | adapter->eims_enable_mask = (1 << (vector)) - 1; | |
1015 | adapter->eims_other = 1 << (vector - 1); | |
1016 | e1e_flush(); | |
1017 | } | |
1018 | ||
2d165771 | 1019 | static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1020 | { |
1021 | if (adapter->msix_entries) { | |
1022 | pci_disable_msix(adapter->pdev); | |
1023 | kfree(adapter->msix_entries); | |
1024 | adapter->msix_entries = NULL; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * igbvf_set_interrupt_capability - set MSI or MSI-X if supported | |
1030 | * | |
1031 | * Attempt to configure interrupts using the best available | |
1032 | * capabilities of the hardware and kernel. | |
1033 | **/ | |
2d165771 | 1034 | static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1035 | { |
1036 | int err = -ENOMEM; | |
1037 | int i; | |
1038 | ||
1039 | /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */ | |
1040 | adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry), | |
1041 | GFP_KERNEL); | |
1042 | if (adapter->msix_entries) { | |
1043 | for (i = 0; i < 3; i++) | |
1044 | adapter->msix_entries[i].entry = i; | |
1045 | ||
1046 | err = pci_enable_msix(adapter->pdev, | |
1047 | adapter->msix_entries, 3); | |
1048 | } | |
1049 | ||
1050 | if (err) { | |
1051 | /* MSI-X failed */ | |
1052 | dev_err(&adapter->pdev->dev, | |
1053 | "Failed to initialize MSI-X interrupts.\n"); | |
1054 | igbvf_reset_interrupt_capability(adapter); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | /** | |
1059 | * igbvf_request_msix - Initialize MSI-X interrupts | |
1060 | * | |
1061 | * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the | |
1062 | * kernel. | |
1063 | **/ | |
1064 | static int igbvf_request_msix(struct igbvf_adapter *adapter) | |
1065 | { | |
1066 | struct net_device *netdev = adapter->netdev; | |
1067 | int err = 0, vector = 0; | |
1068 | ||
1069 | if (strlen(netdev->name) < (IFNAMSIZ - 5)) { | |
1070 | sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name); | |
1071 | sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name); | |
1072 | } else { | |
1073 | memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ); | |
1074 | memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ); | |
1075 | } | |
1076 | ||
1077 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1078 | igbvf_intr_msix_tx, 0, adapter->tx_ring->name, |
d4e0fe01 AD |
1079 | netdev); |
1080 | if (err) | |
1081 | goto out; | |
1082 | ||
1083 | adapter->tx_ring->itr_register = E1000_EITR(vector); | |
ab50a2a4 | 1084 | adapter->tx_ring->itr_val = adapter->current_itr; |
d4e0fe01 AD |
1085 | vector++; |
1086 | ||
1087 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1088 | igbvf_intr_msix_rx, 0, adapter->rx_ring->name, |
d4e0fe01 AD |
1089 | netdev); |
1090 | if (err) | |
1091 | goto out; | |
1092 | ||
1093 | adapter->rx_ring->itr_register = E1000_EITR(vector); | |
ab50a2a4 | 1094 | adapter->rx_ring->itr_val = adapter->current_itr; |
d4e0fe01 AD |
1095 | vector++; |
1096 | ||
1097 | err = request_irq(adapter->msix_entries[vector].vector, | |
a0607fd3 | 1098 | igbvf_msix_other, 0, netdev->name, netdev); |
d4e0fe01 AD |
1099 | if (err) |
1100 | goto out; | |
1101 | ||
1102 | igbvf_configure_msix(adapter); | |
1103 | return 0; | |
1104 | out: | |
1105 | return err; | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * igbvf_alloc_queues - Allocate memory for all rings | |
1110 | * @adapter: board private structure to initialize | |
1111 | **/ | |
9f9a12f8 | 1112 | static int igbvf_alloc_queues(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1113 | { |
1114 | struct net_device *netdev = adapter->netdev; | |
1115 | ||
1116 | adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1117 | if (!adapter->tx_ring) | |
1118 | return -ENOMEM; | |
1119 | ||
1120 | adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL); | |
1121 | if (!adapter->rx_ring) { | |
1122 | kfree(adapter->tx_ring); | |
1123 | return -ENOMEM; | |
1124 | } | |
1125 | ||
1126 | netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64); | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | /** | |
1132 | * igbvf_request_irq - initialize interrupts | |
1133 | * | |
1134 | * Attempts to configure interrupts using the best available | |
1135 | * capabilities of the hardware and kernel. | |
1136 | **/ | |
1137 | static int igbvf_request_irq(struct igbvf_adapter *adapter) | |
1138 | { | |
1139 | int err = -1; | |
1140 | ||
1141 | /* igbvf supports msi-x only */ | |
1142 | if (adapter->msix_entries) | |
1143 | err = igbvf_request_msix(adapter); | |
1144 | ||
1145 | if (!err) | |
1146 | return err; | |
1147 | ||
1148 | dev_err(&adapter->pdev->dev, | |
1149 | "Unable to allocate interrupt, Error: %d\n", err); | |
1150 | ||
1151 | return err; | |
1152 | } | |
1153 | ||
1154 | static void igbvf_free_irq(struct igbvf_adapter *adapter) | |
1155 | { | |
1156 | struct net_device *netdev = adapter->netdev; | |
1157 | int vector; | |
1158 | ||
1159 | if (adapter->msix_entries) { | |
1160 | for (vector = 0; vector < 3; vector++) | |
1161 | free_irq(adapter->msix_entries[vector].vector, netdev); | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | /** | |
1166 | * igbvf_irq_disable - Mask off interrupt generation on the NIC | |
1167 | **/ | |
1168 | static void igbvf_irq_disable(struct igbvf_adapter *adapter) | |
1169 | { | |
1170 | struct e1000_hw *hw = &adapter->hw; | |
1171 | ||
1172 | ew32(EIMC, ~0); | |
1173 | ||
1174 | if (adapter->msix_entries) | |
1175 | ew32(EIAC, 0); | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * igbvf_irq_enable - Enable default interrupt generation settings | |
1180 | **/ | |
1181 | static void igbvf_irq_enable(struct igbvf_adapter *adapter) | |
1182 | { | |
1183 | struct e1000_hw *hw = &adapter->hw; | |
1184 | ||
1185 | ew32(EIAC, adapter->eims_enable_mask); | |
1186 | ew32(EIAM, adapter->eims_enable_mask); | |
1187 | ew32(EIMS, adapter->eims_enable_mask); | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * igbvf_poll - NAPI Rx polling callback | |
1192 | * @napi: struct associated with this polling callback | |
1193 | * @budget: amount of packets driver is allowed to process this poll | |
1194 | **/ | |
1195 | static int igbvf_poll(struct napi_struct *napi, int budget) | |
1196 | { | |
1197 | struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi); | |
1198 | struct igbvf_adapter *adapter = rx_ring->adapter; | |
1199 | struct e1000_hw *hw = &adapter->hw; | |
1200 | int work_done = 0; | |
1201 | ||
1202 | igbvf_clean_rx_irq(adapter, &work_done, budget); | |
1203 | ||
1204 | /* If not enough Rx work done, exit the polling mode */ | |
1205 | if (work_done < budget) { | |
1206 | napi_complete(napi); | |
1207 | ||
ab50a2a4 | 1208 | if (adapter->requested_itr & 3) |
d4e0fe01 AD |
1209 | igbvf_set_itr(adapter); |
1210 | ||
1211 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1212 | ew32(EIMS, adapter->rx_ring->eims_value); | |
1213 | } | |
1214 | ||
1215 | return work_done; | |
1216 | } | |
1217 | ||
1218 | /** | |
1219 | * igbvf_set_rlpml - set receive large packet maximum length | |
1220 | * @adapter: board private structure | |
1221 | * | |
1222 | * Configure the maximum size of packets that will be received | |
1223 | */ | |
1224 | static void igbvf_set_rlpml(struct igbvf_adapter *adapter) | |
1225 | { | |
a0f1d603 | 1226 | int max_frame_size; |
d4e0fe01 AD |
1227 | struct e1000_hw *hw = &adapter->hw; |
1228 | ||
a0f1d603 | 1229 | max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE; |
d4e0fe01 AD |
1230 | e1000_rlpml_set_vf(hw, max_frame_size); |
1231 | } | |
1232 | ||
8e586137 | 1233 | static int igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
d4e0fe01 AD |
1234 | { |
1235 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1236 | struct e1000_hw *hw = &adapter->hw; | |
1237 | ||
8e586137 | 1238 | if (hw->mac.ops.set_vfta(hw, vid, true)) { |
d4e0fe01 | 1239 | dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid); |
8e586137 JP |
1240 | return -EINVAL; |
1241 | } | |
1242 | set_bit(vid, adapter->active_vlans); | |
1243 | return 0; | |
d4e0fe01 AD |
1244 | } |
1245 | ||
8e586137 | 1246 | static int igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
d4e0fe01 AD |
1247 | { |
1248 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1249 | struct e1000_hw *hw = &adapter->hw; | |
1250 | ||
8e586137 | 1251 | if (hw->mac.ops.set_vfta(hw, vid, false)) { |
d4e0fe01 AD |
1252 | dev_err(&adapter->pdev->dev, |
1253 | "Failed to remove vlan id %d\n", vid); | |
8e586137 JP |
1254 | return -EINVAL; |
1255 | } | |
1256 | clear_bit(vid, adapter->active_vlans); | |
1257 | return 0; | |
d4e0fe01 AD |
1258 | } |
1259 | ||
1260 | static void igbvf_restore_vlan(struct igbvf_adapter *adapter) | |
1261 | { | |
1262 | u16 vid; | |
1263 | ||
a0f1d603 | 1264 | for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
d4e0fe01 | 1265 | igbvf_vlan_rx_add_vid(adapter->netdev, vid); |
d4e0fe01 AD |
1266 | } |
1267 | ||
1268 | /** | |
1269 | * igbvf_configure_tx - Configure Transmit Unit after Reset | |
1270 | * @adapter: board private structure | |
1271 | * | |
1272 | * Configure the Tx unit of the MAC after a reset. | |
1273 | **/ | |
1274 | static void igbvf_configure_tx(struct igbvf_adapter *adapter) | |
1275 | { | |
1276 | struct e1000_hw *hw = &adapter->hw; | |
1277 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1278 | u64 tdba; | |
1279 | u32 txdctl, dca_txctrl; | |
1280 | ||
1281 | /* disable transmits */ | |
1282 | txdctl = er32(TXDCTL(0)); | |
1283 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
945a5151 | 1284 | e1e_flush(); |
d4e0fe01 AD |
1285 | msleep(10); |
1286 | ||
1287 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
1288 | ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc)); | |
1289 | tdba = tx_ring->dma; | |
8e20ce94 | 1290 | ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32))); |
d4e0fe01 AD |
1291 | ew32(TDBAH(0), (tdba >> 32)); |
1292 | ew32(TDH(0), 0); | |
1293 | ew32(TDT(0), 0); | |
1294 | tx_ring->head = E1000_TDH(0); | |
1295 | tx_ring->tail = E1000_TDT(0); | |
1296 | ||
1297 | /* Turn off Relaxed Ordering on head write-backs. The writebacks | |
1298 | * MUST be delivered in order or it will completely screw up | |
1299 | * our bookeeping. | |
1300 | */ | |
1301 | dca_txctrl = er32(DCA_TXCTRL(0)); | |
1302 | dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN; | |
1303 | ew32(DCA_TXCTRL(0), dca_txctrl); | |
1304 | ||
1305 | /* enable transmits */ | |
1306 | txdctl |= E1000_TXDCTL_QUEUE_ENABLE; | |
1307 | ew32(TXDCTL(0), txdctl); | |
1308 | ||
1309 | /* Setup Transmit Descriptor Settings for eop descriptor */ | |
1310 | adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS; | |
1311 | ||
1312 | /* enable Report Status bit */ | |
1313 | adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS; | |
d4e0fe01 AD |
1314 | } |
1315 | ||
1316 | /** | |
1317 | * igbvf_setup_srrctl - configure the receive control registers | |
1318 | * @adapter: Board private structure | |
1319 | **/ | |
1320 | static void igbvf_setup_srrctl(struct igbvf_adapter *adapter) | |
1321 | { | |
1322 | struct e1000_hw *hw = &adapter->hw; | |
1323 | u32 srrctl = 0; | |
1324 | ||
1325 | srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK | | |
1326 | E1000_SRRCTL_BSIZEHDR_MASK | | |
1327 | E1000_SRRCTL_BSIZEPKT_MASK); | |
1328 | ||
1329 | /* Enable queue drop to avoid head of line blocking */ | |
1330 | srrctl |= E1000_SRRCTL_DROP_EN; | |
1331 | ||
1332 | /* Setup buffer sizes */ | |
1333 | srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >> | |
1334 | E1000_SRRCTL_BSIZEPKT_SHIFT; | |
1335 | ||
1336 | if (adapter->rx_buffer_len < 2048) { | |
1337 | adapter->rx_ps_hdr_size = 0; | |
1338 | srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF; | |
1339 | } else { | |
1340 | adapter->rx_ps_hdr_size = 128; | |
1341 | srrctl |= adapter->rx_ps_hdr_size << | |
1342 | E1000_SRRCTL_BSIZEHDRSIZE_SHIFT; | |
1343 | srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; | |
1344 | } | |
1345 | ||
1346 | ew32(SRRCTL(0), srrctl); | |
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * igbvf_configure_rx - Configure Receive Unit after Reset | |
1351 | * @adapter: board private structure | |
1352 | * | |
1353 | * Configure the Rx unit of the MAC after a reset. | |
1354 | **/ | |
1355 | static void igbvf_configure_rx(struct igbvf_adapter *adapter) | |
1356 | { | |
1357 | struct e1000_hw *hw = &adapter->hw; | |
1358 | struct igbvf_ring *rx_ring = adapter->rx_ring; | |
1359 | u64 rdba; | |
1360 | u32 rdlen, rxdctl; | |
1361 | ||
1362 | /* disable receives */ | |
1363 | rxdctl = er32(RXDCTL(0)); | |
1364 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
945a5151 | 1365 | e1e_flush(); |
d4e0fe01 AD |
1366 | msleep(10); |
1367 | ||
1368 | rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc); | |
1369 | ||
1370 | /* | |
1371 | * Setup the HW Rx Head and Tail Descriptor Pointers and | |
1372 | * the Base and Length of the Rx Descriptor Ring | |
1373 | */ | |
1374 | rdba = rx_ring->dma; | |
8e20ce94 | 1375 | ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32))); |
d4e0fe01 AD |
1376 | ew32(RDBAH(0), (rdba >> 32)); |
1377 | ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc)); | |
1378 | rx_ring->head = E1000_RDH(0); | |
1379 | rx_ring->tail = E1000_RDT(0); | |
1380 | ew32(RDH(0), 0); | |
1381 | ew32(RDT(0), 0); | |
1382 | ||
1383 | rxdctl |= E1000_RXDCTL_QUEUE_ENABLE; | |
1384 | rxdctl &= 0xFFF00000; | |
1385 | rxdctl |= IGBVF_RX_PTHRESH; | |
1386 | rxdctl |= IGBVF_RX_HTHRESH << 8; | |
1387 | rxdctl |= IGBVF_RX_WTHRESH << 16; | |
1388 | ||
1389 | igbvf_set_rlpml(adapter); | |
1390 | ||
1391 | /* enable receives */ | |
1392 | ew32(RXDCTL(0), rxdctl); | |
1393 | } | |
1394 | ||
1395 | /** | |
1396 | * igbvf_set_multi - Multicast and Promiscuous mode set | |
1397 | * @netdev: network interface device structure | |
1398 | * | |
1399 | * The set_multi entry point is called whenever the multicast address | |
1400 | * list or the network interface flags are updated. This routine is | |
1401 | * responsible for configuring the hardware for proper multicast, | |
1402 | * promiscuous mode, and all-multi behavior. | |
1403 | **/ | |
1404 | static void igbvf_set_multi(struct net_device *netdev) | |
1405 | { | |
1406 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1407 | struct e1000_hw *hw = &adapter->hw; | |
22bedad3 | 1408 | struct netdev_hw_addr *ha; |
d4e0fe01 AD |
1409 | u8 *mta_list = NULL; |
1410 | int i; | |
1411 | ||
4cd24eaf | 1412 | if (!netdev_mc_empty(netdev)) { |
b2adaca9 JP |
1413 | mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN, |
1414 | GFP_ATOMIC); | |
1415 | if (!mta_list) | |
d4e0fe01 | 1416 | return; |
d4e0fe01 AD |
1417 | } |
1418 | ||
1419 | /* prepare a packed array of only addresses. */ | |
48e2f183 | 1420 | i = 0; |
22bedad3 JP |
1421 | netdev_for_each_mc_addr(ha, netdev) |
1422 | memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN); | |
d4e0fe01 AD |
1423 | |
1424 | hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0); | |
1425 | kfree(mta_list); | |
1426 | } | |
1427 | ||
1428 | /** | |
1429 | * igbvf_configure - configure the hardware for Rx and Tx | |
1430 | * @adapter: private board structure | |
1431 | **/ | |
1432 | static void igbvf_configure(struct igbvf_adapter *adapter) | |
1433 | { | |
1434 | igbvf_set_multi(adapter->netdev); | |
1435 | ||
1436 | igbvf_restore_vlan(adapter); | |
1437 | ||
1438 | igbvf_configure_tx(adapter); | |
1439 | igbvf_setup_srrctl(adapter); | |
1440 | igbvf_configure_rx(adapter); | |
1441 | igbvf_alloc_rx_buffers(adapter->rx_ring, | |
1442 | igbvf_desc_unused(adapter->rx_ring)); | |
1443 | } | |
1444 | ||
1445 | /* igbvf_reset - bring the hardware into a known good state | |
1446 | * | |
1447 | * This function boots the hardware and enables some settings that | |
1448 | * require a configuration cycle of the hardware - those cannot be | |
1449 | * set/changed during runtime. After reset the device needs to be | |
1450 | * properly configured for Rx, Tx etc. | |
1451 | */ | |
2d165771 | 1452 | static void igbvf_reset(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1453 | { |
1454 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1455 | struct net_device *netdev = adapter->netdev; | |
1456 | struct e1000_hw *hw = &adapter->hw; | |
1457 | ||
1458 | /* Allow time for pending master requests to run */ | |
1459 | if (mac->ops.reset_hw(hw)) | |
1460 | dev_err(&adapter->pdev->dev, "PF still resetting\n"); | |
1461 | ||
1462 | mac->ops.init_hw(hw); | |
1463 | ||
1464 | if (is_valid_ether_addr(adapter->hw.mac.addr)) { | |
1465 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, | |
1466 | netdev->addr_len); | |
1467 | memcpy(netdev->perm_addr, adapter->hw.mac.addr, | |
1468 | netdev->addr_len); | |
1469 | } | |
72279093 AD |
1470 | |
1471 | adapter->last_reset = jiffies; | |
d4e0fe01 AD |
1472 | } |
1473 | ||
1474 | int igbvf_up(struct igbvf_adapter *adapter) | |
1475 | { | |
1476 | struct e1000_hw *hw = &adapter->hw; | |
1477 | ||
1478 | /* hardware has been reset, we need to reload some things */ | |
1479 | igbvf_configure(adapter); | |
1480 | ||
1481 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1482 | ||
1483 | napi_enable(&adapter->rx_ring->napi); | |
1484 | if (adapter->msix_entries) | |
1485 | igbvf_configure_msix(adapter); | |
1486 | ||
1487 | /* Clear any pending interrupts. */ | |
1488 | er32(EICR); | |
1489 | igbvf_irq_enable(adapter); | |
1490 | ||
1491 | /* start the watchdog */ | |
1492 | hw->mac.get_link_status = 1; | |
1493 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1494 | ||
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | void igbvf_down(struct igbvf_adapter *adapter) | |
1500 | { | |
1501 | struct net_device *netdev = adapter->netdev; | |
1502 | struct e1000_hw *hw = &adapter->hw; | |
1503 | u32 rxdctl, txdctl; | |
1504 | ||
1505 | /* | |
1506 | * signal that we're down so the interrupt handler does not | |
1507 | * reschedule our watchdog timer | |
1508 | */ | |
1509 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1510 | ||
1511 | /* disable receives in the hardware */ | |
1512 | rxdctl = er32(RXDCTL(0)); | |
1513 | ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE); | |
1514 | ||
1515 | netif_stop_queue(netdev); | |
1516 | ||
1517 | /* disable transmits in the hardware */ | |
1518 | txdctl = er32(TXDCTL(0)); | |
1519 | ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE); | |
1520 | ||
1521 | /* flush both disables and wait for them to finish */ | |
1522 | e1e_flush(); | |
1523 | msleep(10); | |
1524 | ||
1525 | napi_disable(&adapter->rx_ring->napi); | |
1526 | ||
1527 | igbvf_irq_disable(adapter); | |
1528 | ||
1529 | del_timer_sync(&adapter->watchdog_timer); | |
1530 | ||
d4e0fe01 AD |
1531 | netif_carrier_off(netdev); |
1532 | ||
1533 | /* record the stats before reset*/ | |
1534 | igbvf_update_stats(adapter); | |
1535 | ||
1536 | adapter->link_speed = 0; | |
1537 | adapter->link_duplex = 0; | |
1538 | ||
1539 | igbvf_reset(adapter); | |
1540 | igbvf_clean_tx_ring(adapter->tx_ring); | |
1541 | igbvf_clean_rx_ring(adapter->rx_ring); | |
1542 | } | |
1543 | ||
1544 | void igbvf_reinit_locked(struct igbvf_adapter *adapter) | |
1545 | { | |
1546 | might_sleep(); | |
1547 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
1548 | msleep(1); | |
1549 | igbvf_down(adapter); | |
1550 | igbvf_up(adapter); | |
1551 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter) | |
1556 | * @adapter: board private structure to initialize | |
1557 | * | |
1558 | * igbvf_sw_init initializes the Adapter private data structure. | |
1559 | * Fields are initialized based on PCI device information and | |
1560 | * OS network device settings (MTU size). | |
1561 | **/ | |
9f9a12f8 | 1562 | static int igbvf_sw_init(struct igbvf_adapter *adapter) |
d4e0fe01 AD |
1563 | { |
1564 | struct net_device *netdev = adapter->netdev; | |
1565 | s32 rc; | |
1566 | ||
1567 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN; | |
1568 | adapter->rx_ps_hdr_size = 0; | |
1569 | adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; | |
1570 | adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; | |
1571 | ||
1572 | adapter->tx_int_delay = 8; | |
1573 | adapter->tx_abs_int_delay = 32; | |
1574 | adapter->rx_int_delay = 0; | |
1575 | adapter->rx_abs_int_delay = 8; | |
ab50a2a4 MW |
1576 | adapter->requested_itr = 3; |
1577 | adapter->current_itr = IGBVF_START_ITR; | |
d4e0fe01 AD |
1578 | |
1579 | /* Set various function pointers */ | |
1580 | adapter->ei->init_ops(&adapter->hw); | |
1581 | ||
1582 | rc = adapter->hw.mac.ops.init_params(&adapter->hw); | |
1583 | if (rc) | |
1584 | return rc; | |
1585 | ||
1586 | rc = adapter->hw.mbx.ops.init_params(&adapter->hw); | |
1587 | if (rc) | |
1588 | return rc; | |
1589 | ||
1590 | igbvf_set_interrupt_capability(adapter); | |
1591 | ||
1592 | if (igbvf_alloc_queues(adapter)) | |
1593 | return -ENOMEM; | |
1594 | ||
1595 | spin_lock_init(&adapter->tx_queue_lock); | |
1596 | ||
1597 | /* Explicitly disable IRQ since the NIC can be in any state. */ | |
1598 | igbvf_irq_disable(adapter); | |
1599 | ||
1600 | spin_lock_init(&adapter->stats_lock); | |
1601 | ||
1602 | set_bit(__IGBVF_DOWN, &adapter->state); | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter) | |
1607 | { | |
1608 | struct e1000_hw *hw = &adapter->hw; | |
1609 | ||
1610 | adapter->stats.last_gprc = er32(VFGPRC); | |
1611 | adapter->stats.last_gorc = er32(VFGORC); | |
1612 | adapter->stats.last_gptc = er32(VFGPTC); | |
1613 | adapter->stats.last_gotc = er32(VFGOTC); | |
1614 | adapter->stats.last_mprc = er32(VFMPRC); | |
1615 | adapter->stats.last_gotlbc = er32(VFGOTLBC); | |
1616 | adapter->stats.last_gptlbc = er32(VFGPTLBC); | |
1617 | adapter->stats.last_gorlbc = er32(VFGORLBC); | |
1618 | adapter->stats.last_gprlbc = er32(VFGPRLBC); | |
1619 | ||
1620 | adapter->stats.base_gprc = er32(VFGPRC); | |
1621 | adapter->stats.base_gorc = er32(VFGORC); | |
1622 | adapter->stats.base_gptc = er32(VFGPTC); | |
1623 | adapter->stats.base_gotc = er32(VFGOTC); | |
1624 | adapter->stats.base_mprc = er32(VFMPRC); | |
1625 | adapter->stats.base_gotlbc = er32(VFGOTLBC); | |
1626 | adapter->stats.base_gptlbc = er32(VFGPTLBC); | |
1627 | adapter->stats.base_gorlbc = er32(VFGORLBC); | |
1628 | adapter->stats.base_gprlbc = er32(VFGPRLBC); | |
1629 | } | |
1630 | ||
1631 | /** | |
1632 | * igbvf_open - Called when a network interface is made active | |
1633 | * @netdev: network interface device structure | |
1634 | * | |
1635 | * Returns 0 on success, negative value on failure | |
1636 | * | |
1637 | * The open entry point is called when a network interface is made | |
1638 | * active by the system (IFF_UP). At this point all resources needed | |
1639 | * for transmit and receive operations are allocated, the interrupt | |
1640 | * handler is registered with the OS, the watchdog timer is started, | |
1641 | * and the stack is notified that the interface is ready. | |
1642 | **/ | |
1643 | static int igbvf_open(struct net_device *netdev) | |
1644 | { | |
1645 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1646 | struct e1000_hw *hw = &adapter->hw; | |
1647 | int err; | |
1648 | ||
1649 | /* disallow open during test */ | |
1650 | if (test_bit(__IGBVF_TESTING, &adapter->state)) | |
1651 | return -EBUSY; | |
1652 | ||
1653 | /* allocate transmit descriptors */ | |
1654 | err = igbvf_setup_tx_resources(adapter, adapter->tx_ring); | |
1655 | if (err) | |
1656 | goto err_setup_tx; | |
1657 | ||
1658 | /* allocate receive descriptors */ | |
1659 | err = igbvf_setup_rx_resources(adapter, adapter->rx_ring); | |
1660 | if (err) | |
1661 | goto err_setup_rx; | |
1662 | ||
1663 | /* | |
1664 | * before we allocate an interrupt, we must be ready to handle it. | |
1665 | * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt | |
1666 | * as soon as we call pci_request_irq, so we have to setup our | |
1667 | * clean_rx handler before we do so. | |
1668 | */ | |
1669 | igbvf_configure(adapter); | |
1670 | ||
1671 | err = igbvf_request_irq(adapter); | |
1672 | if (err) | |
1673 | goto err_req_irq; | |
1674 | ||
1675 | /* From here on the code is the same as igbvf_up() */ | |
1676 | clear_bit(__IGBVF_DOWN, &adapter->state); | |
1677 | ||
1678 | napi_enable(&adapter->rx_ring->napi); | |
1679 | ||
1680 | /* clear any pending interrupts */ | |
1681 | er32(EICR); | |
1682 | ||
1683 | igbvf_irq_enable(adapter); | |
1684 | ||
1685 | /* start the watchdog */ | |
1686 | hw->mac.get_link_status = 1; | |
1687 | mod_timer(&adapter->watchdog_timer, jiffies + 1); | |
1688 | ||
1689 | return 0; | |
1690 | ||
1691 | err_req_irq: | |
1692 | igbvf_free_rx_resources(adapter->rx_ring); | |
1693 | err_setup_rx: | |
1694 | igbvf_free_tx_resources(adapter->tx_ring); | |
1695 | err_setup_tx: | |
1696 | igbvf_reset(adapter); | |
1697 | ||
1698 | return err; | |
1699 | } | |
1700 | ||
1701 | /** | |
1702 | * igbvf_close - Disables a network interface | |
1703 | * @netdev: network interface device structure | |
1704 | * | |
1705 | * Returns 0, this is not allowed to fail | |
1706 | * | |
1707 | * The close entry point is called when an interface is de-activated | |
1708 | * by the OS. The hardware is still under the drivers control, but | |
1709 | * needs to be disabled. A global MAC reset is issued to stop the | |
1710 | * hardware, and all transmit and receive resources are freed. | |
1711 | **/ | |
1712 | static int igbvf_close(struct net_device *netdev) | |
1713 | { | |
1714 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1715 | ||
1716 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
1717 | igbvf_down(adapter); | |
1718 | ||
1719 | igbvf_free_irq(adapter); | |
1720 | ||
1721 | igbvf_free_tx_resources(adapter->tx_ring); | |
1722 | igbvf_free_rx_resources(adapter->rx_ring); | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | /** | |
1727 | * igbvf_set_mac - Change the Ethernet Address of the NIC | |
1728 | * @netdev: network interface device structure | |
1729 | * @p: pointer to an address structure | |
1730 | * | |
1731 | * Returns 0 on success, negative on failure | |
1732 | **/ | |
1733 | static int igbvf_set_mac(struct net_device *netdev, void *p) | |
1734 | { | |
1735 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
1736 | struct e1000_hw *hw = &adapter->hw; | |
1737 | struct sockaddr *addr = p; | |
1738 | ||
1739 | if (!is_valid_ether_addr(addr->sa_data)) | |
1740 | return -EADDRNOTAVAIL; | |
1741 | ||
1742 | memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len); | |
1743 | ||
1744 | hw->mac.ops.rar_set(hw, hw->mac.addr, 0); | |
1745 | ||
1746 | if (memcmp(addr->sa_data, hw->mac.addr, 6)) | |
1747 | return -EADDRNOTAVAIL; | |
1748 | ||
1749 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | ||
1754 | #define UPDATE_VF_COUNTER(reg, name) \ | |
1755 | { \ | |
1756 | u32 current_counter = er32(reg); \ | |
1757 | if (current_counter < adapter->stats.last_##name) \ | |
1758 | adapter->stats.name += 0x100000000LL; \ | |
1759 | adapter->stats.last_##name = current_counter; \ | |
1760 | adapter->stats.name &= 0xFFFFFFFF00000000LL; \ | |
1761 | adapter->stats.name |= current_counter; \ | |
1762 | } | |
1763 | ||
1764 | /** | |
1765 | * igbvf_update_stats - Update the board statistics counters | |
1766 | * @adapter: board private structure | |
1767 | **/ | |
1768 | void igbvf_update_stats(struct igbvf_adapter *adapter) | |
1769 | { | |
1770 | struct e1000_hw *hw = &adapter->hw; | |
1771 | struct pci_dev *pdev = adapter->pdev; | |
1772 | ||
1773 | /* | |
1774 | * Prevent stats update while adapter is being reset, link is down | |
1775 | * or if the pci connection is down. | |
1776 | */ | |
1777 | if (adapter->link_speed == 0) | |
1778 | return; | |
1779 | ||
1780 | if (test_bit(__IGBVF_RESETTING, &adapter->state)) | |
1781 | return; | |
1782 | ||
1783 | if (pci_channel_offline(pdev)) | |
1784 | return; | |
1785 | ||
1786 | UPDATE_VF_COUNTER(VFGPRC, gprc); | |
1787 | UPDATE_VF_COUNTER(VFGORC, gorc); | |
1788 | UPDATE_VF_COUNTER(VFGPTC, gptc); | |
1789 | UPDATE_VF_COUNTER(VFGOTC, gotc); | |
1790 | UPDATE_VF_COUNTER(VFMPRC, mprc); | |
1791 | UPDATE_VF_COUNTER(VFGOTLBC, gotlbc); | |
1792 | UPDATE_VF_COUNTER(VFGPTLBC, gptlbc); | |
1793 | UPDATE_VF_COUNTER(VFGORLBC, gorlbc); | |
1794 | UPDATE_VF_COUNTER(VFGPRLBC, gprlbc); | |
1795 | ||
1796 | /* Fill out the OS statistics structure */ | |
1797 | adapter->net_stats.multicast = adapter->stats.mprc; | |
1798 | } | |
1799 | ||
1800 | static void igbvf_print_link_info(struct igbvf_adapter *adapter) | |
1801 | { | |
a4ba8cbe JK |
1802 | dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n", |
1803 | adapter->link_speed, | |
1804 | adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half"); | |
d4e0fe01 AD |
1805 | } |
1806 | ||
1807 | static bool igbvf_has_link(struct igbvf_adapter *adapter) | |
1808 | { | |
1809 | struct e1000_hw *hw = &adapter->hw; | |
1810 | s32 ret_val = E1000_SUCCESS; | |
1811 | bool link_active; | |
1812 | ||
72279093 AD |
1813 | /* If interface is down, stay link down */ |
1814 | if (test_bit(__IGBVF_DOWN, &adapter->state)) | |
1815 | return false; | |
1816 | ||
d4e0fe01 AD |
1817 | ret_val = hw->mac.ops.check_for_link(hw); |
1818 | link_active = !hw->mac.get_link_status; | |
1819 | ||
1820 | /* if check for link returns error we will need to reset */ | |
72279093 | 1821 | if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ))) |
d4e0fe01 AD |
1822 | schedule_work(&adapter->reset_task); |
1823 | ||
1824 | return link_active; | |
1825 | } | |
1826 | ||
1827 | /** | |
1828 | * igbvf_watchdog - Timer Call-back | |
1829 | * @data: pointer to adapter cast into an unsigned long | |
1830 | **/ | |
1831 | static void igbvf_watchdog(unsigned long data) | |
1832 | { | |
1833 | struct igbvf_adapter *adapter = (struct igbvf_adapter *) data; | |
1834 | ||
1835 | /* Do the rest outside of interrupt context */ | |
1836 | schedule_work(&adapter->watchdog_task); | |
1837 | } | |
1838 | ||
1839 | static void igbvf_watchdog_task(struct work_struct *work) | |
1840 | { | |
1841 | struct igbvf_adapter *adapter = container_of(work, | |
1842 | struct igbvf_adapter, | |
1843 | watchdog_task); | |
1844 | struct net_device *netdev = adapter->netdev; | |
1845 | struct e1000_mac_info *mac = &adapter->hw.mac; | |
1846 | struct igbvf_ring *tx_ring = adapter->tx_ring; | |
1847 | struct e1000_hw *hw = &adapter->hw; | |
1848 | u32 link; | |
1849 | int tx_pending = 0; | |
1850 | ||
1851 | link = igbvf_has_link(adapter); | |
1852 | ||
1853 | if (link) { | |
1854 | if (!netif_carrier_ok(netdev)) { | |
d4e0fe01 AD |
1855 | mac->ops.get_link_up_info(&adapter->hw, |
1856 | &adapter->link_speed, | |
1857 | &adapter->link_duplex); | |
1858 | igbvf_print_link_info(adapter); | |
1859 | ||
d4e0fe01 AD |
1860 | netif_carrier_on(netdev); |
1861 | netif_wake_queue(netdev); | |
1862 | } | |
1863 | } else { | |
1864 | if (netif_carrier_ok(netdev)) { | |
1865 | adapter->link_speed = 0; | |
1866 | adapter->link_duplex = 0; | |
1867 | dev_info(&adapter->pdev->dev, "Link is Down\n"); | |
1868 | netif_carrier_off(netdev); | |
1869 | netif_stop_queue(netdev); | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | if (netif_carrier_ok(netdev)) { | |
1874 | igbvf_update_stats(adapter); | |
1875 | } else { | |
1876 | tx_pending = (igbvf_desc_unused(tx_ring) + 1 < | |
1877 | tx_ring->count); | |
1878 | if (tx_pending) { | |
1879 | /* | |
1880 | * We've lost link, so the controller stops DMA, | |
1881 | * but we've got queued Tx work that's never going | |
1882 | * to get done, so reset controller to flush Tx. | |
1883 | * (Do the reset outside of interrupt context). | |
1884 | */ | |
1885 | adapter->tx_timeout_count++; | |
1886 | schedule_work(&adapter->reset_task); | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | /* Cause software interrupt to ensure Rx ring is cleaned */ | |
1891 | ew32(EICS, adapter->rx_ring->eims_value); | |
1892 | ||
d4e0fe01 AD |
1893 | /* Reset the timer */ |
1894 | if (!test_bit(__IGBVF_DOWN, &adapter->state)) | |
1895 | mod_timer(&adapter->watchdog_timer, | |
1896 | round_jiffies(jiffies + (2 * HZ))); | |
1897 | } | |
1898 | ||
1899 | #define IGBVF_TX_FLAGS_CSUM 0x00000001 | |
1900 | #define IGBVF_TX_FLAGS_VLAN 0x00000002 | |
1901 | #define IGBVF_TX_FLAGS_TSO 0x00000004 | |
1902 | #define IGBVF_TX_FLAGS_IPV4 0x00000008 | |
1903 | #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 | |
1904 | #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 | |
1905 | ||
1906 | static int igbvf_tso(struct igbvf_adapter *adapter, | |
1907 | struct igbvf_ring *tx_ring, | |
1908 | struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) | |
1909 | { | |
1910 | struct e1000_adv_tx_context_desc *context_desc; | |
1911 | unsigned int i; | |
1912 | int err; | |
1913 | struct igbvf_buffer *buffer_info; | |
1914 | u32 info = 0, tu_cmd = 0; | |
1915 | u32 mss_l4len_idx, l4len; | |
1916 | *hdr_len = 0; | |
1917 | ||
1918 | if (skb_header_cloned(skb)) { | |
1919 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
1920 | if (err) { | |
1921 | dev_err(&adapter->pdev->dev, | |
1922 | "igbvf_tso returning an error\n"); | |
1923 | return err; | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | l4len = tcp_hdrlen(skb); | |
1928 | *hdr_len += l4len; | |
1929 | ||
1930 | if (skb->protocol == htons(ETH_P_IP)) { | |
1931 | struct iphdr *iph = ip_hdr(skb); | |
1932 | iph->tot_len = 0; | |
1933 | iph->check = 0; | |
1934 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, | |
1935 | iph->daddr, 0, | |
1936 | IPPROTO_TCP, | |
1937 | 0); | |
8e1e8a47 | 1938 | } else if (skb_is_gso_v6(skb)) { |
d4e0fe01 AD |
1939 | ipv6_hdr(skb)->payload_len = 0; |
1940 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
1941 | &ipv6_hdr(skb)->daddr, | |
1942 | 0, IPPROTO_TCP, 0); | |
1943 | } | |
1944 | ||
1945 | i = tx_ring->next_to_use; | |
1946 | ||
1947 | buffer_info = &tx_ring->buffer_info[i]; | |
1948 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
1949 | /* VLAN MACLEN IPLEN */ | |
1950 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
1951 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
1952 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
1953 | *hdr_len += skb_network_offset(skb); | |
1954 | info |= (skb_transport_header(skb) - skb_network_header(skb)); | |
1955 | *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); | |
1956 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
1957 | ||
1958 | /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ | |
1959 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
1960 | ||
1961 | if (skb->protocol == htons(ETH_P_IP)) | |
1962 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
1963 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
1964 | ||
1965 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
1966 | ||
1967 | /* MSS L4LEN IDX */ | |
1968 | mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); | |
1969 | mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); | |
1970 | ||
1971 | context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); | |
1972 | context_desc->seqnum_seed = 0; | |
1973 | ||
1974 | buffer_info->time_stamp = jiffies; | |
d4e0fe01 AD |
1975 | buffer_info->dma = 0; |
1976 | i++; | |
1977 | if (i == tx_ring->count) | |
1978 | i = 0; | |
1979 | ||
1980 | tx_ring->next_to_use = i; | |
1981 | ||
1982 | return true; | |
1983 | } | |
1984 | ||
1985 | static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, | |
1986 | struct igbvf_ring *tx_ring, | |
1987 | struct sk_buff *skb, u32 tx_flags) | |
1988 | { | |
1989 | struct e1000_adv_tx_context_desc *context_desc; | |
1990 | unsigned int i; | |
1991 | struct igbvf_buffer *buffer_info; | |
1992 | u32 info = 0, tu_cmd = 0; | |
1993 | ||
1994 | if ((skb->ip_summed == CHECKSUM_PARTIAL) || | |
1995 | (tx_flags & IGBVF_TX_FLAGS_VLAN)) { | |
1996 | i = tx_ring->next_to_use; | |
1997 | buffer_info = &tx_ring->buffer_info[i]; | |
1998 | context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); | |
1999 | ||
2000 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
2001 | info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); | |
2002 | ||
2003 | info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); | |
2004 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
2005 | info |= (skb_transport_header(skb) - | |
2006 | skb_network_header(skb)); | |
2007 | ||
2008 | ||
2009 | context_desc->vlan_macip_lens = cpu_to_le32(info); | |
2010 | ||
2011 | tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); | |
2012 | ||
2013 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
2014 | switch (skb->protocol) { | |
2015 | case __constant_htons(ETH_P_IP): | |
2016 | tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; | |
2017 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) | |
2018 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
2019 | break; | |
2020 | case __constant_htons(ETH_P_IPV6): | |
2021 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
2022 | tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; | |
2023 | break; | |
2024 | default: | |
2025 | break; | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); | |
2030 | context_desc->seqnum_seed = 0; | |
2031 | context_desc->mss_l4len_idx = 0; | |
2032 | ||
2033 | buffer_info->time_stamp = jiffies; | |
d4e0fe01 AD |
2034 | buffer_info->dma = 0; |
2035 | i++; | |
2036 | if (i == tx_ring->count) | |
2037 | i = 0; | |
2038 | tx_ring->next_to_use = i; | |
2039 | ||
2040 | return true; | |
2041 | } | |
2042 | ||
2043 | return false; | |
2044 | } | |
2045 | ||
2046 | static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) | |
2047 | { | |
2048 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2049 | ||
2050 | /* there is enough descriptors then we don't need to worry */ | |
2051 | if (igbvf_desc_unused(adapter->tx_ring) >= size) | |
2052 | return 0; | |
2053 | ||
2054 | netif_stop_queue(netdev); | |
2055 | ||
2056 | smp_mb(); | |
2057 | ||
2058 | /* We need to check again just in case room has been made available */ | |
2059 | if (igbvf_desc_unused(adapter->tx_ring) < size) | |
2060 | return -EBUSY; | |
2061 | ||
2062 | netif_wake_queue(netdev); | |
2063 | ||
2064 | ++adapter->restart_queue; | |
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | #define IGBVF_MAX_TXD_PWR 16 | |
2069 | #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) | |
2070 | ||
2071 | static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, | |
2072 | struct igbvf_ring *tx_ring, | |
3eb1a40f | 2073 | struct sk_buff *skb) |
d4e0fe01 AD |
2074 | { |
2075 | struct igbvf_buffer *buffer_info; | |
a7d5ca40 | 2076 | struct pci_dev *pdev = adapter->pdev; |
d4e0fe01 AD |
2077 | unsigned int len = skb_headlen(skb); |
2078 | unsigned int count = 0, i; | |
2079 | unsigned int f; | |
d4e0fe01 AD |
2080 | |
2081 | i = tx_ring->next_to_use; | |
2082 | ||
d4e0fe01 AD |
2083 | buffer_info = &tx_ring->buffer_info[i]; |
2084 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2085 | buffer_info->length = len; | |
2086 | /* set time_stamp *before* dma to help avoid a possible race */ | |
2087 | buffer_info->time_stamp = jiffies; | |
ac26d7d6 | 2088 | buffer_info->mapped_as_page = false; |
123e9f1a NN |
2089 | buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len, |
2090 | DMA_TO_DEVICE); | |
2091 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
a7d5ca40 AD |
2092 | goto dma_error; |
2093 | ||
d4e0fe01 AD |
2094 | |
2095 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { | |
9e903e08 | 2096 | const struct skb_frag_struct *frag; |
d4e0fe01 | 2097 | |
8581145f | 2098 | count++; |
d4e0fe01 AD |
2099 | i++; |
2100 | if (i == tx_ring->count) | |
2101 | i = 0; | |
2102 | ||
2103 | frag = &skb_shinfo(skb)->frags[f]; | |
9e903e08 | 2104 | len = skb_frag_size(frag); |
d4e0fe01 AD |
2105 | |
2106 | buffer_info = &tx_ring->buffer_info[i]; | |
2107 | BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); | |
2108 | buffer_info->length = len; | |
2109 | buffer_info->time_stamp = jiffies; | |
a7d5ca40 | 2110 | buffer_info->mapped_as_page = true; |
877749bf | 2111 | buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len, |
123e9f1a NN |
2112 | DMA_TO_DEVICE); |
2113 | if (dma_mapping_error(&pdev->dev, buffer_info->dma)) | |
a7d5ca40 | 2114 | goto dma_error; |
d4e0fe01 AD |
2115 | } |
2116 | ||
2117 | tx_ring->buffer_info[i].skb = skb; | |
d4e0fe01 | 2118 | |
a7d5ca40 AD |
2119 | return ++count; |
2120 | ||
2121 | dma_error: | |
2122 | dev_err(&pdev->dev, "TX DMA map failed\n"); | |
2123 | ||
2124 | /* clear timestamp and dma mappings for failed buffer_info mapping */ | |
2125 | buffer_info->dma = 0; | |
2126 | buffer_info->time_stamp = 0; | |
2127 | buffer_info->length = 0; | |
a7d5ca40 | 2128 | buffer_info->mapped_as_page = false; |
c1fa347f RK |
2129 | if (count) |
2130 | count--; | |
a7d5ca40 AD |
2131 | |
2132 | /* clear timestamp and dma mappings for remaining portion of packet */ | |
c1fa347f RK |
2133 | while (count--) { |
2134 | if (i==0) | |
a7d5ca40 | 2135 | i += tx_ring->count; |
c1fa347f | 2136 | i--; |
a7d5ca40 AD |
2137 | buffer_info = &tx_ring->buffer_info[i]; |
2138 | igbvf_put_txbuf(adapter, buffer_info); | |
2139 | } | |
2140 | ||
2141 | return 0; | |
d4e0fe01 AD |
2142 | } |
2143 | ||
2144 | static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, | |
2145 | struct igbvf_ring *tx_ring, | |
3eb1a40f AD |
2146 | int tx_flags, int count, |
2147 | unsigned int first, u32 paylen, | |
d4e0fe01 AD |
2148 | u8 hdr_len) |
2149 | { | |
2150 | union e1000_adv_tx_desc *tx_desc = NULL; | |
2151 | struct igbvf_buffer *buffer_info; | |
2152 | u32 olinfo_status = 0, cmd_type_len; | |
2153 | unsigned int i; | |
2154 | ||
2155 | cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | | |
2156 | E1000_ADVTXD_DCMD_DEXT); | |
2157 | ||
2158 | if (tx_flags & IGBVF_TX_FLAGS_VLAN) | |
2159 | cmd_type_len |= E1000_ADVTXD_DCMD_VLE; | |
2160 | ||
2161 | if (tx_flags & IGBVF_TX_FLAGS_TSO) { | |
2162 | cmd_type_len |= E1000_ADVTXD_DCMD_TSE; | |
2163 | ||
2164 | /* insert tcp checksum */ | |
2165 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2166 | ||
2167 | /* insert ip checksum */ | |
2168 | if (tx_flags & IGBVF_TX_FLAGS_IPV4) | |
2169 | olinfo_status |= E1000_TXD_POPTS_IXSM << 8; | |
2170 | ||
2171 | } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { | |
2172 | olinfo_status |= E1000_TXD_POPTS_TXSM << 8; | |
2173 | } | |
2174 | ||
2175 | olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); | |
2176 | ||
2177 | i = tx_ring->next_to_use; | |
2178 | while (count--) { | |
2179 | buffer_info = &tx_ring->buffer_info[i]; | |
2180 | tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); | |
2181 | tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma); | |
2182 | tx_desc->read.cmd_type_len = | |
2183 | cpu_to_le32(cmd_type_len | buffer_info->length); | |
2184 | tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); | |
2185 | i++; | |
2186 | if (i == tx_ring->count) | |
2187 | i = 0; | |
2188 | } | |
2189 | ||
2190 | tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); | |
2191 | /* Force memory writes to complete before letting h/w | |
2192 | * know there are new descriptors to fetch. (Only | |
2193 | * applicable for weak-ordered memory model archs, | |
2194 | * such as IA-64). */ | |
2195 | wmb(); | |
2196 | ||
3eb1a40f | 2197 | tx_ring->buffer_info[first].next_to_watch = tx_desc; |
d4e0fe01 AD |
2198 | tx_ring->next_to_use = i; |
2199 | writel(i, adapter->hw.hw_addr + tx_ring->tail); | |
2200 | /* we need this if more than one processor can write to our tail | |
2201 | * at a time, it syncronizes IO on IA64/Altix systems */ | |
2202 | mmiowb(); | |
2203 | } | |
2204 | ||
3b29a56d SH |
2205 | static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, |
2206 | struct net_device *netdev, | |
2207 | struct igbvf_ring *tx_ring) | |
d4e0fe01 AD |
2208 | { |
2209 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2210 | unsigned int first, tx_flags = 0; | |
2211 | u8 hdr_len = 0; | |
2212 | int count = 0; | |
2213 | int tso = 0; | |
2214 | ||
2215 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2216 | dev_kfree_skb_any(skb); | |
2217 | return NETDEV_TX_OK; | |
2218 | } | |
2219 | ||
2220 | if (skb->len <= 0) { | |
2221 | dev_kfree_skb_any(skb); | |
2222 | return NETDEV_TX_OK; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * need: count + 4 desc gap to keep tail from touching | |
2227 | * + 2 desc gap to keep tail from touching head, | |
2228 | * + 1 desc for skb->data, | |
2229 | * + 1 desc for context descriptor, | |
2230 | * head, otherwise try next time | |
2231 | */ | |
2232 | if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { | |
2233 | /* this is a hard error */ | |
2234 | return NETDEV_TX_BUSY; | |
2235 | } | |
2236 | ||
a0f1d603 | 2237 | if (vlan_tx_tag_present(skb)) { |
d4e0fe01 AD |
2238 | tx_flags |= IGBVF_TX_FLAGS_VLAN; |
2239 | tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); | |
2240 | } | |
2241 | ||
2242 | if (skb->protocol == htons(ETH_P_IP)) | |
2243 | tx_flags |= IGBVF_TX_FLAGS_IPV4; | |
2244 | ||
2245 | first = tx_ring->next_to_use; | |
2246 | ||
2247 | tso = skb_is_gso(skb) ? | |
2248 | igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; | |
2249 | if (unlikely(tso < 0)) { | |
2250 | dev_kfree_skb_any(skb); | |
2251 | return NETDEV_TX_OK; | |
2252 | } | |
2253 | ||
2254 | if (tso) | |
2255 | tx_flags |= IGBVF_TX_FLAGS_TSO; | |
2256 | else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && | |
2257 | (skb->ip_summed == CHECKSUM_PARTIAL)) | |
2258 | tx_flags |= IGBVF_TX_FLAGS_CSUM; | |
2259 | ||
2260 | /* | |
2261 | * count reflects descriptors mapped, if 0 then mapping error | |
25985edc | 2262 | * has occurred and we need to rewind the descriptor queue |
d4e0fe01 | 2263 | */ |
3eb1a40f | 2264 | count = igbvf_tx_map_adv(adapter, tx_ring, skb); |
d4e0fe01 AD |
2265 | |
2266 | if (count) { | |
2267 | igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, | |
3eb1a40f | 2268 | first, skb->len, hdr_len); |
d4e0fe01 AD |
2269 | /* Make sure there is space in the ring for the next send. */ |
2270 | igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); | |
2271 | } else { | |
2272 | dev_kfree_skb_any(skb); | |
2273 | tx_ring->buffer_info[first].time_stamp = 0; | |
2274 | tx_ring->next_to_use = first; | |
2275 | } | |
2276 | ||
2277 | return NETDEV_TX_OK; | |
2278 | } | |
2279 | ||
3b29a56d SH |
2280 | static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, |
2281 | struct net_device *netdev) | |
d4e0fe01 AD |
2282 | { |
2283 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2284 | struct igbvf_ring *tx_ring; | |
d4e0fe01 AD |
2285 | |
2286 | if (test_bit(__IGBVF_DOWN, &adapter->state)) { | |
2287 | dev_kfree_skb_any(skb); | |
2288 | return NETDEV_TX_OK; | |
2289 | } | |
2290 | ||
2291 | tx_ring = &adapter->tx_ring[0]; | |
2292 | ||
3b29a56d | 2293 | return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); |
d4e0fe01 AD |
2294 | } |
2295 | ||
2296 | /** | |
2297 | * igbvf_tx_timeout - Respond to a Tx Hang | |
2298 | * @netdev: network interface device structure | |
2299 | **/ | |
2300 | static void igbvf_tx_timeout(struct net_device *netdev) | |
2301 | { | |
2302 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2303 | ||
2304 | /* Do the reset outside of interrupt context */ | |
2305 | adapter->tx_timeout_count++; | |
2306 | schedule_work(&adapter->reset_task); | |
2307 | } | |
2308 | ||
2309 | static void igbvf_reset_task(struct work_struct *work) | |
2310 | { | |
2311 | struct igbvf_adapter *adapter; | |
2312 | adapter = container_of(work, struct igbvf_adapter, reset_task); | |
2313 | ||
2314 | igbvf_reinit_locked(adapter); | |
2315 | } | |
2316 | ||
2317 | /** | |
2318 | * igbvf_get_stats - Get System Network Statistics | |
2319 | * @netdev: network interface device structure | |
2320 | * | |
2321 | * Returns the address of the device statistics structure. | |
2322 | * The statistics are actually updated from the timer callback. | |
2323 | **/ | |
2324 | static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) | |
2325 | { | |
2326 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2327 | ||
2328 | /* only return the current stats */ | |
2329 | return &adapter->net_stats; | |
2330 | } | |
2331 | ||
2332 | /** | |
2333 | * igbvf_change_mtu - Change the Maximum Transfer Unit | |
2334 | * @netdev: network interface device structure | |
2335 | * @new_mtu: new value for maximum frame size | |
2336 | * | |
2337 | * Returns 0 on success, negative on failure | |
2338 | **/ | |
2339 | static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) | |
2340 | { | |
2341 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2342 | int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; | |
2343 | ||
2344 | if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { | |
2345 | dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); | |
2346 | return -EINVAL; | |
2347 | } | |
2348 | ||
d4e0fe01 AD |
2349 | #define MAX_STD_JUMBO_FRAME_SIZE 9234 |
2350 | if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { | |
2351 | dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); | |
2352 | return -EINVAL; | |
2353 | } | |
2354 | ||
2355 | while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) | |
2356 | msleep(1); | |
2357 | /* igbvf_down has a dependency on max_frame_size */ | |
2358 | adapter->max_frame_size = max_frame; | |
2359 | if (netif_running(netdev)) | |
2360 | igbvf_down(adapter); | |
2361 | ||
2362 | /* | |
2363 | * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN | |
2364 | * means we reserve 2 more, this pushes us to allocate from the next | |
2365 | * larger slab size. | |
2366 | * i.e. RXBUFFER_2048 --> size-4096 slab | |
2367 | * However with the new *_jumbo_rx* routines, jumbo receives will use | |
2368 | * fragmented skbs | |
2369 | */ | |
2370 | ||
2371 | if (max_frame <= 1024) | |
2372 | adapter->rx_buffer_len = 1024; | |
2373 | else if (max_frame <= 2048) | |
2374 | adapter->rx_buffer_len = 2048; | |
2375 | else | |
2376 | #if (PAGE_SIZE / 2) > 16384 | |
2377 | adapter->rx_buffer_len = 16384; | |
2378 | #else | |
2379 | adapter->rx_buffer_len = PAGE_SIZE / 2; | |
2380 | #endif | |
2381 | ||
2382 | ||
2383 | /* adjust allocation if LPE protects us, and we aren't using SBP */ | |
2384 | if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || | |
2385 | (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) | |
2386 | adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + | |
2387 | ETH_FCS_LEN; | |
2388 | ||
2389 | dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", | |
2390 | netdev->mtu, new_mtu); | |
2391 | netdev->mtu = new_mtu; | |
2392 | ||
2393 | if (netif_running(netdev)) | |
2394 | igbvf_up(adapter); | |
2395 | else | |
2396 | igbvf_reset(adapter); | |
2397 | ||
2398 | clear_bit(__IGBVF_RESETTING, &adapter->state); | |
2399 | ||
2400 | return 0; | |
2401 | } | |
2402 | ||
2403 | static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
2404 | { | |
2405 | switch (cmd) { | |
2406 | default: | |
2407 | return -EOPNOTSUPP; | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) | |
2412 | { | |
2413 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2414 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2415 | #ifdef CONFIG_PM | |
2416 | int retval = 0; | |
2417 | #endif | |
2418 | ||
2419 | netif_device_detach(netdev); | |
2420 | ||
2421 | if (netif_running(netdev)) { | |
2422 | WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); | |
2423 | igbvf_down(adapter); | |
2424 | igbvf_free_irq(adapter); | |
2425 | } | |
2426 | ||
2427 | #ifdef CONFIG_PM | |
2428 | retval = pci_save_state(pdev); | |
2429 | if (retval) | |
2430 | return retval; | |
2431 | #endif | |
2432 | ||
2433 | pci_disable_device(pdev); | |
2434 | ||
2435 | return 0; | |
2436 | } | |
2437 | ||
2438 | #ifdef CONFIG_PM | |
2439 | static int igbvf_resume(struct pci_dev *pdev) | |
2440 | { | |
2441 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2442 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2443 | u32 err; | |
2444 | ||
2445 | pci_restore_state(pdev); | |
2446 | err = pci_enable_device_mem(pdev); | |
2447 | if (err) { | |
2448 | dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); | |
2449 | return err; | |
2450 | } | |
2451 | ||
2452 | pci_set_master(pdev); | |
2453 | ||
2454 | if (netif_running(netdev)) { | |
2455 | err = igbvf_request_irq(adapter); | |
2456 | if (err) | |
2457 | return err; | |
2458 | } | |
2459 | ||
2460 | igbvf_reset(adapter); | |
2461 | ||
2462 | if (netif_running(netdev)) | |
2463 | igbvf_up(adapter); | |
2464 | ||
2465 | netif_device_attach(netdev); | |
2466 | ||
2467 | return 0; | |
2468 | } | |
2469 | #endif | |
2470 | ||
2471 | static void igbvf_shutdown(struct pci_dev *pdev) | |
2472 | { | |
2473 | igbvf_suspend(pdev, PMSG_SUSPEND); | |
2474 | } | |
2475 | ||
2476 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2477 | /* | |
2478 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
2479 | * without having to re-enable interrupts. It's not called while | |
2480 | * the interrupt routine is executing. | |
2481 | */ | |
2482 | static void igbvf_netpoll(struct net_device *netdev) | |
2483 | { | |
2484 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2485 | ||
2486 | disable_irq(adapter->pdev->irq); | |
2487 | ||
2488 | igbvf_clean_tx_irq(adapter->tx_ring); | |
2489 | ||
2490 | enable_irq(adapter->pdev->irq); | |
2491 | } | |
2492 | #endif | |
2493 | ||
2494 | /** | |
2495 | * igbvf_io_error_detected - called when PCI error is detected | |
2496 | * @pdev: Pointer to PCI device | |
2497 | * @state: The current pci connection state | |
2498 | * | |
2499 | * This function is called after a PCI bus error affecting | |
2500 | * this device has been detected. | |
2501 | */ | |
2502 | static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, | |
2503 | pci_channel_state_t state) | |
2504 | { | |
2505 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2506 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2507 | ||
2508 | netif_device_detach(netdev); | |
2509 | ||
c06c430d DN |
2510 | if (state == pci_channel_io_perm_failure) |
2511 | return PCI_ERS_RESULT_DISCONNECT; | |
2512 | ||
d4e0fe01 AD |
2513 | if (netif_running(netdev)) |
2514 | igbvf_down(adapter); | |
2515 | pci_disable_device(pdev); | |
2516 | ||
2517 | /* Request a slot slot reset. */ | |
2518 | return PCI_ERS_RESULT_NEED_RESET; | |
2519 | } | |
2520 | ||
2521 | /** | |
2522 | * igbvf_io_slot_reset - called after the pci bus has been reset. | |
2523 | * @pdev: Pointer to PCI device | |
2524 | * | |
2525 | * Restart the card from scratch, as if from a cold-boot. Implementation | |
2526 | * resembles the first-half of the igbvf_resume routine. | |
2527 | */ | |
2528 | static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) | |
2529 | { | |
2530 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2531 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2532 | ||
2533 | if (pci_enable_device_mem(pdev)) { | |
2534 | dev_err(&pdev->dev, | |
2535 | "Cannot re-enable PCI device after reset.\n"); | |
2536 | return PCI_ERS_RESULT_DISCONNECT; | |
2537 | } | |
2538 | pci_set_master(pdev); | |
2539 | ||
2540 | igbvf_reset(adapter); | |
2541 | ||
2542 | return PCI_ERS_RESULT_RECOVERED; | |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * igbvf_io_resume - called when traffic can start flowing again. | |
2547 | * @pdev: Pointer to PCI device | |
2548 | * | |
2549 | * This callback is called when the error recovery driver tells us that | |
2550 | * its OK to resume normal operation. Implementation resembles the | |
2551 | * second-half of the igbvf_resume routine. | |
2552 | */ | |
2553 | static void igbvf_io_resume(struct pci_dev *pdev) | |
2554 | { | |
2555 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2556 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2557 | ||
2558 | if (netif_running(netdev)) { | |
2559 | if (igbvf_up(adapter)) { | |
2560 | dev_err(&pdev->dev, | |
2561 | "can't bring device back up after reset\n"); | |
2562 | return; | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | netif_device_attach(netdev); | |
2567 | } | |
2568 | ||
2569 | static void igbvf_print_device_info(struct igbvf_adapter *adapter) | |
2570 | { | |
2571 | struct e1000_hw *hw = &adapter->hw; | |
2572 | struct net_device *netdev = adapter->netdev; | |
2573 | struct pci_dev *pdev = adapter->pdev; | |
2574 | ||
10090751 WM |
2575 | if (hw->mac.type == e1000_vfadapt_i350) |
2576 | dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n"); | |
2577 | else | |
2578 | dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); | |
753cdc33 | 2579 | dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr); |
d4e0fe01 AD |
2580 | } |
2581 | ||
c8f44aff MM |
2582 | static int igbvf_set_features(struct net_device *netdev, |
2583 | netdev_features_t features) | |
fd38f734 MM |
2584 | { |
2585 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2586 | ||
2587 | if (features & NETIF_F_RXCSUM) | |
2588 | adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED; | |
2589 | else | |
2590 | adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED; | |
2591 | ||
2592 | return 0; | |
2593 | } | |
2594 | ||
d4e0fe01 AD |
2595 | static const struct net_device_ops igbvf_netdev_ops = { |
2596 | .ndo_open = igbvf_open, | |
2597 | .ndo_stop = igbvf_close, | |
2598 | .ndo_start_xmit = igbvf_xmit_frame, | |
2599 | .ndo_get_stats = igbvf_get_stats, | |
afc4b13d | 2600 | .ndo_set_rx_mode = igbvf_set_multi, |
d4e0fe01 AD |
2601 | .ndo_set_mac_address = igbvf_set_mac, |
2602 | .ndo_change_mtu = igbvf_change_mtu, | |
2603 | .ndo_do_ioctl = igbvf_ioctl, | |
2604 | .ndo_tx_timeout = igbvf_tx_timeout, | |
d4e0fe01 AD |
2605 | .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, |
2606 | .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, | |
2607 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2608 | .ndo_poll_controller = igbvf_netpoll, | |
2609 | #endif | |
fd38f734 | 2610 | .ndo_set_features = igbvf_set_features, |
d4e0fe01 AD |
2611 | }; |
2612 | ||
2613 | /** | |
2614 | * igbvf_probe - Device Initialization Routine | |
2615 | * @pdev: PCI device information struct | |
2616 | * @ent: entry in igbvf_pci_tbl | |
2617 | * | |
2618 | * Returns 0 on success, negative on failure | |
2619 | * | |
2620 | * igbvf_probe initializes an adapter identified by a pci_dev structure. | |
2621 | * The OS initialization, configuring of the adapter private structure, | |
2622 | * and a hardware reset occur. | |
2623 | **/ | |
1dd06ae8 | 2624 | static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
d4e0fe01 AD |
2625 | { |
2626 | struct net_device *netdev; | |
2627 | struct igbvf_adapter *adapter; | |
2628 | struct e1000_hw *hw; | |
2629 | const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; | |
2630 | ||
2631 | static int cards_found; | |
2632 | int err, pci_using_dac; | |
2633 | ||
2634 | err = pci_enable_device_mem(pdev); | |
2635 | if (err) | |
2636 | return err; | |
2637 | ||
2638 | pci_using_dac = 0; | |
123e9f1a | 2639 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); |
d4e0fe01 | 2640 | if (!err) { |
123e9f1a | 2641 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
d4e0fe01 AD |
2642 | if (!err) |
2643 | pci_using_dac = 1; | |
2644 | } else { | |
123e9f1a | 2645 | err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
d4e0fe01 | 2646 | if (err) { |
123e9f1a NN |
2647 | err = dma_set_coherent_mask(&pdev->dev, |
2648 | DMA_BIT_MASK(32)); | |
d4e0fe01 AD |
2649 | if (err) { |
2650 | dev_err(&pdev->dev, "No usable DMA " | |
2651 | "configuration, aborting\n"); | |
2652 | goto err_dma; | |
2653 | } | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | err = pci_request_regions(pdev, igbvf_driver_name); | |
2658 | if (err) | |
2659 | goto err_pci_reg; | |
2660 | ||
2661 | pci_set_master(pdev); | |
2662 | ||
2663 | err = -ENOMEM; | |
2664 | netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); | |
2665 | if (!netdev) | |
2666 | goto err_alloc_etherdev; | |
2667 | ||
2668 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2669 | ||
2670 | pci_set_drvdata(pdev, netdev); | |
2671 | adapter = netdev_priv(netdev); | |
2672 | hw = &adapter->hw; | |
2673 | adapter->netdev = netdev; | |
2674 | adapter->pdev = pdev; | |
2675 | adapter->ei = ei; | |
2676 | adapter->pba = ei->pba; | |
2677 | adapter->flags = ei->flags; | |
2678 | adapter->hw.back = adapter; | |
2679 | adapter->hw.mac.type = ei->mac; | |
b3f4d599 | 2680 | adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
d4e0fe01 AD |
2681 | |
2682 | /* PCI config space info */ | |
2683 | ||
2684 | hw->vendor_id = pdev->vendor; | |
2685 | hw->device_id = pdev->device; | |
2686 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
2687 | hw->subsystem_device_id = pdev->subsystem_device; | |
ff938e43 | 2688 | hw->revision_id = pdev->revision; |
d4e0fe01 AD |
2689 | |
2690 | err = -EIO; | |
2691 | adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), | |
2692 | pci_resource_len(pdev, 0)); | |
2693 | ||
2694 | if (!adapter->hw.hw_addr) | |
2695 | goto err_ioremap; | |
2696 | ||
2697 | if (ei->get_variants) { | |
2698 | err = ei->get_variants(adapter); | |
2699 | if (err) | |
2700 | goto err_ioremap; | |
2701 | } | |
2702 | ||
2703 | /* setup adapter struct */ | |
2704 | err = igbvf_sw_init(adapter); | |
2705 | if (err) | |
2706 | goto err_sw_init; | |
2707 | ||
2708 | /* construct the net_device struct */ | |
2709 | netdev->netdev_ops = &igbvf_netdev_ops; | |
2710 | ||
2711 | igbvf_set_ethtool_ops(netdev); | |
2712 | netdev->watchdog_timeo = 5 * HZ; | |
2713 | strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); | |
2714 | ||
2715 | adapter->bd_number = cards_found++; | |
2716 | ||
fd38f734 | 2717 | netdev->hw_features = NETIF_F_SG | |
d4e0fe01 | 2718 | NETIF_F_IP_CSUM | |
fd38f734 MM |
2719 | NETIF_F_IPV6_CSUM | |
2720 | NETIF_F_TSO | | |
2721 | NETIF_F_TSO6 | | |
2722 | NETIF_F_RXCSUM; | |
2723 | ||
2724 | netdev->features = netdev->hw_features | | |
d4e0fe01 AD |
2725 | NETIF_F_HW_VLAN_TX | |
2726 | NETIF_F_HW_VLAN_RX | | |
2727 | NETIF_F_HW_VLAN_FILTER; | |
2728 | ||
d4e0fe01 AD |
2729 | if (pci_using_dac) |
2730 | netdev->features |= NETIF_F_HIGHDMA; | |
2731 | ||
2732 | netdev->vlan_features |= NETIF_F_TSO; | |
2733 | netdev->vlan_features |= NETIF_F_TSO6; | |
2734 | netdev->vlan_features |= NETIF_F_IP_CSUM; | |
2735 | netdev->vlan_features |= NETIF_F_IPV6_CSUM; | |
2736 | netdev->vlan_features |= NETIF_F_SG; | |
2737 | ||
2738 | /*reset the controller to put the device in a known good state */ | |
2739 | err = hw->mac.ops.reset_hw(hw); | |
2740 | if (err) { | |
2741 | dev_info(&pdev->dev, | |
8d56b6d5 | 2742 | "PF still in reset state. Is the PF interface up?\n"); |
d4e0fe01 AD |
2743 | } else { |
2744 | err = hw->mac.ops.read_mac_addr(hw); | |
8d56b6d5 MW |
2745 | if (err) |
2746 | dev_info(&pdev->dev, "Error reading MAC address.\n"); | |
2747 | else if (is_zero_ether_addr(adapter->hw.mac.addr)) | |
2748 | dev_info(&pdev->dev, "MAC address not assigned by administrator.\n"); | |
1a0d6ae5 | 2749 | memcpy(netdev->dev_addr, adapter->hw.mac.addr, |
8d56b6d5 | 2750 | netdev->addr_len); |
d4e0fe01 AD |
2751 | } |
2752 | ||
9bd1be45 | 2753 | if (!is_valid_ether_addr(netdev->dev_addr)) { |
8d56b6d5 MW |
2754 | dev_info(&pdev->dev, "Assigning random MAC address.\n"); |
2755 | eth_hw_addr_random(netdev); | |
2756 | memcpy(adapter->hw.mac.addr, netdev->dev_addr, | |
2757 | netdev->addr_len); | |
d4e0fe01 AD |
2758 | } |
2759 | ||
2760 | setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, | |
2761 | (unsigned long) adapter); | |
2762 | ||
2763 | INIT_WORK(&adapter->reset_task, igbvf_reset_task); | |
2764 | INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); | |
2765 | ||
2766 | /* ring size defaults */ | |
2767 | adapter->rx_ring->count = 1024; | |
2768 | adapter->tx_ring->count = 1024; | |
2769 | ||
2770 | /* reset the hardware with the new settings */ | |
2771 | igbvf_reset(adapter); | |
2772 | ||
2c1a1019 MW |
2773 | /* set hardware-specific flags */ |
2774 | if (adapter->hw.mac.type == e1000_vfadapt_i350) | |
2775 | adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP; | |
2776 | ||
d4e0fe01 AD |
2777 | strcpy(netdev->name, "eth%d"); |
2778 | err = register_netdev(netdev); | |
2779 | if (err) | |
2780 | goto err_hw_init; | |
2781 | ||
de7fe787 ET |
2782 | /* tell the stack to leave us alone until igbvf_open() is called */ |
2783 | netif_carrier_off(netdev); | |
2784 | netif_stop_queue(netdev); | |
2785 | ||
d4e0fe01 AD |
2786 | igbvf_print_device_info(adapter); |
2787 | ||
2788 | igbvf_initialize_last_counter_stats(adapter); | |
2789 | ||
2790 | return 0; | |
2791 | ||
2792 | err_hw_init: | |
2793 | kfree(adapter->tx_ring); | |
2794 | kfree(adapter->rx_ring); | |
2795 | err_sw_init: | |
2796 | igbvf_reset_interrupt_capability(adapter); | |
2797 | iounmap(adapter->hw.hw_addr); | |
2798 | err_ioremap: | |
2799 | free_netdev(netdev); | |
2800 | err_alloc_etherdev: | |
2801 | pci_release_regions(pdev); | |
2802 | err_pci_reg: | |
2803 | err_dma: | |
2804 | pci_disable_device(pdev); | |
2805 | return err; | |
2806 | } | |
2807 | ||
2808 | /** | |
2809 | * igbvf_remove - Device Removal Routine | |
2810 | * @pdev: PCI device information struct | |
2811 | * | |
2812 | * igbvf_remove is called by the PCI subsystem to alert the driver | |
2813 | * that it should release a PCI device. The could be caused by a | |
2814 | * Hot-Plug event, or because the driver is going to be removed from | |
2815 | * memory. | |
2816 | **/ | |
9f9a12f8 | 2817 | static void igbvf_remove(struct pci_dev *pdev) |
d4e0fe01 AD |
2818 | { |
2819 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2820 | struct igbvf_adapter *adapter = netdev_priv(netdev); | |
2821 | struct e1000_hw *hw = &adapter->hw; | |
2822 | ||
2823 | /* | |
760141a5 TH |
2824 | * The watchdog timer may be rescheduled, so explicitly |
2825 | * disable it from being rescheduled. | |
d4e0fe01 AD |
2826 | */ |
2827 | set_bit(__IGBVF_DOWN, &adapter->state); | |
2828 | del_timer_sync(&adapter->watchdog_timer); | |
2829 | ||
760141a5 TH |
2830 | cancel_work_sync(&adapter->reset_task); |
2831 | cancel_work_sync(&adapter->watchdog_task); | |
d4e0fe01 AD |
2832 | |
2833 | unregister_netdev(netdev); | |
2834 | ||
2835 | igbvf_reset_interrupt_capability(adapter); | |
2836 | ||
2837 | /* | |
2838 | * it is important to delete the napi struct prior to freeing the | |
2839 | * rx ring so that you do not end up with null pointer refs | |
2840 | */ | |
2841 | netif_napi_del(&adapter->rx_ring->napi); | |
2842 | kfree(adapter->tx_ring); | |
2843 | kfree(adapter->rx_ring); | |
2844 | ||
2845 | iounmap(hw->hw_addr); | |
2846 | if (hw->flash_address) | |
2847 | iounmap(hw->flash_address); | |
2848 | pci_release_regions(pdev); | |
2849 | ||
2850 | free_netdev(netdev); | |
2851 | ||
2852 | pci_disable_device(pdev); | |
2853 | } | |
2854 | ||
2855 | /* PCI Error Recovery (ERS) */ | |
3646f0e5 | 2856 | static const struct pci_error_handlers igbvf_err_handler = { |
d4e0fe01 AD |
2857 | .error_detected = igbvf_io_error_detected, |
2858 | .slot_reset = igbvf_io_slot_reset, | |
2859 | .resume = igbvf_io_resume, | |
2860 | }; | |
2861 | ||
a3aa1884 | 2862 | static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = { |
d4e0fe01 | 2863 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, |
031d7952 | 2864 | { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf }, |
d4e0fe01 AD |
2865 | { } /* terminate list */ |
2866 | }; | |
2867 | MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); | |
2868 | ||
2869 | /* PCI Device API Driver */ | |
2870 | static struct pci_driver igbvf_driver = { | |
2871 | .name = igbvf_driver_name, | |
2872 | .id_table = igbvf_pci_tbl, | |
2873 | .probe = igbvf_probe, | |
9f9a12f8 | 2874 | .remove = igbvf_remove, |
d4e0fe01 AD |
2875 | #ifdef CONFIG_PM |
2876 | /* Power Management Hooks */ | |
2877 | .suspend = igbvf_suspend, | |
2878 | .resume = igbvf_resume, | |
2879 | #endif | |
2880 | .shutdown = igbvf_shutdown, | |
2881 | .err_handler = &igbvf_err_handler | |
2882 | }; | |
2883 | ||
2884 | /** | |
2885 | * igbvf_init_module - Driver Registration Routine | |
2886 | * | |
2887 | * igbvf_init_module is the first routine called when the driver is | |
2888 | * loaded. All it does is register with the PCI subsystem. | |
2889 | **/ | |
2890 | static int __init igbvf_init_module(void) | |
2891 | { | |
2892 | int ret; | |
a4ba8cbe JK |
2893 | pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version); |
2894 | pr_info("%s\n", igbvf_copyright); | |
d4e0fe01 AD |
2895 | |
2896 | ret = pci_register_driver(&igbvf_driver); | |
d4e0fe01 AD |
2897 | |
2898 | return ret; | |
2899 | } | |
2900 | module_init(igbvf_init_module); | |
2901 | ||
2902 | /** | |
2903 | * igbvf_exit_module - Driver Exit Cleanup Routine | |
2904 | * | |
2905 | * igbvf_exit_module is called just before the driver is removed | |
2906 | * from memory. | |
2907 | **/ | |
2908 | static void __exit igbvf_exit_module(void) | |
2909 | { | |
2910 | pci_unregister_driver(&igbvf_driver); | |
d4e0fe01 AD |
2911 | } |
2912 | module_exit(igbvf_exit_module); | |
2913 | ||
2914 | ||
2915 | MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); | |
10090751 | 2916 | MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver"); |
d4e0fe01 AD |
2917 | MODULE_LICENSE("GPL"); |
2918 | MODULE_VERSION(DRV_VERSION); | |
2919 | ||
2920 | /* netdev.c */ |