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[deliverable/linux.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * The full GNU General Public License is included in this distribution in
21 * the file called "COPYING".
22 *
23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24 *
25 */
26
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29
30 #include "vmxnet3_int.h"
31
32 char vmxnet3_driver_name[] = "vmxnet3";
33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
34
35 /*
36 * PCI Device ID Table
37 * Last entry must be all 0s
38 */
39 static const struct pci_device_id vmxnet3_pciid_table[] = {
40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
41 {0}
42 };
43
44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
45
46 static int enable_mq = 1;
47
48 static void
49 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
50
51 /*
52 * Enable/Disable the given intr
53 */
54 static void
55 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
56 {
57 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
58 }
59
60
61 static void
62 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
63 {
64 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
65 }
66
67
68 /*
69 * Enable/Disable all intrs used by the device
70 */
71 static void
72 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
73 {
74 int i;
75
76 for (i = 0; i < adapter->intr.num_intrs; i++)
77 vmxnet3_enable_intr(adapter, i);
78 adapter->shared->devRead.intrConf.intrCtrl &=
79 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
80 }
81
82
83 static void
84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
85 {
86 int i;
87
88 adapter->shared->devRead.intrConf.intrCtrl |=
89 cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
90 for (i = 0; i < adapter->intr.num_intrs; i++)
91 vmxnet3_disable_intr(adapter, i);
92 }
93
94
95 static void
96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
97 {
98 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
99 }
100
101
102 static bool
103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
104 {
105 return tq->stopped;
106 }
107
108
109 static void
110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
111 {
112 tq->stopped = false;
113 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
114 }
115
116
117 static void
118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
119 {
120 tq->stopped = false;
121 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
122 }
123
124
125 static void
126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
127 {
128 tq->stopped = true;
129 tq->num_stop++;
130 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
131 }
132
133
134 /*
135 * Check the link state. This may start or stop the tx queue.
136 */
137 static void
138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
139 {
140 u32 ret;
141 int i;
142 unsigned long flags;
143
144 spin_lock_irqsave(&adapter->cmd_lock, flags);
145 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
146 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
147 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
148
149 adapter->link_speed = ret >> 16;
150 if (ret & 1) { /* Link is up. */
151 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
152 adapter->link_speed);
153 netif_carrier_on(adapter->netdev);
154
155 if (affectTxQueue) {
156 for (i = 0; i < adapter->num_tx_queues; i++)
157 vmxnet3_tq_start(&adapter->tx_queue[i],
158 adapter);
159 }
160 } else {
161 netdev_info(adapter->netdev, "NIC Link is Down\n");
162 netif_carrier_off(adapter->netdev);
163
164 if (affectTxQueue) {
165 for (i = 0; i < adapter->num_tx_queues; i++)
166 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
167 }
168 }
169 }
170
171 static void
172 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
173 {
174 int i;
175 unsigned long flags;
176 u32 events = le32_to_cpu(adapter->shared->ecr);
177 if (!events)
178 return;
179
180 vmxnet3_ack_events(adapter, events);
181
182 /* Check if link state has changed */
183 if (events & VMXNET3_ECR_LINK)
184 vmxnet3_check_link(adapter, true);
185
186 /* Check if there is an error on xmit/recv queues */
187 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
188 spin_lock_irqsave(&adapter->cmd_lock, flags);
189 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
190 VMXNET3_CMD_GET_QUEUE_STATUS);
191 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
192
193 for (i = 0; i < adapter->num_tx_queues; i++)
194 if (adapter->tqd_start[i].status.stopped)
195 dev_err(&adapter->netdev->dev,
196 "%s: tq[%d] error 0x%x\n",
197 adapter->netdev->name, i, le32_to_cpu(
198 adapter->tqd_start[i].status.error));
199 for (i = 0; i < adapter->num_rx_queues; i++)
200 if (adapter->rqd_start[i].status.stopped)
201 dev_err(&adapter->netdev->dev,
202 "%s: rq[%d] error 0x%x\n",
203 adapter->netdev->name, i,
204 adapter->rqd_start[i].status.error);
205
206 schedule_work(&adapter->work);
207 }
208 }
209
210 #ifdef __BIG_ENDIAN_BITFIELD
211 /*
212 * The device expects the bitfields in shared structures to be written in
213 * little endian. When CPU is big endian, the following routines are used to
214 * correctly read and write into ABI.
215 * The general technique used here is : double word bitfields are defined in
216 * opposite order for big endian architecture. Then before reading them in
217 * driver the complete double word is translated using le32_to_cpu. Similarly
218 * After the driver writes into bitfields, cpu_to_le32 is used to translate the
219 * double words into required format.
220 * In order to avoid touching bits in shared structure more than once, temporary
221 * descriptors are used. These are passed as srcDesc to following functions.
222 */
223 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
224 struct Vmxnet3_RxDesc *dstDesc)
225 {
226 u32 *src = (u32 *)srcDesc + 2;
227 u32 *dst = (u32 *)dstDesc + 2;
228 dstDesc->addr = le64_to_cpu(srcDesc->addr);
229 *dst = le32_to_cpu(*src);
230 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
231 }
232
233 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
234 struct Vmxnet3_TxDesc *dstDesc)
235 {
236 int i;
237 u32 *src = (u32 *)(srcDesc + 1);
238 u32 *dst = (u32 *)(dstDesc + 1);
239
240 /* Working backwards so that the gen bit is set at the end. */
241 for (i = 2; i > 0; i--) {
242 src--;
243 dst--;
244 *dst = cpu_to_le32(*src);
245 }
246 }
247
248
249 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
250 struct Vmxnet3_RxCompDesc *dstDesc)
251 {
252 int i = 0;
253 u32 *src = (u32 *)srcDesc;
254 u32 *dst = (u32 *)dstDesc;
255 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
256 *dst = le32_to_cpu(*src);
257 src++;
258 dst++;
259 }
260 }
261
262
263 /* Used to read bitfield values from double words. */
264 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
265 {
266 u32 temp = le32_to_cpu(*bitfield);
267 u32 mask = ((1 << size) - 1) << pos;
268 temp &= mask;
269 temp >>= pos;
270 return temp;
271 }
272
273
274
275 #endif /* __BIG_ENDIAN_BITFIELD */
276
277 #ifdef __BIG_ENDIAN_BITFIELD
278
279 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
280 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
281 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
282 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
283 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
284 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
285 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
286 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
287 VMXNET3_TCD_GEN_SIZE)
288 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
289 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
290 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
291 (dstrcd) = (tmp); \
292 vmxnet3_RxCompToCPU((rcd), (tmp)); \
293 } while (0)
294 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
295 (dstrxd) = (tmp); \
296 vmxnet3_RxDescToCPU((rxd), (tmp)); \
297 } while (0)
298
299 #else
300
301 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
302 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
303 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
304 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
305 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
306 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
307
308 #endif /* __BIG_ENDIAN_BITFIELD */
309
310
311 static void
312 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
313 struct pci_dev *pdev)
314 {
315 if (tbi->map_type == VMXNET3_MAP_SINGLE)
316 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len,
317 PCI_DMA_TODEVICE);
318 else if (tbi->map_type == VMXNET3_MAP_PAGE)
319 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len,
320 PCI_DMA_TODEVICE);
321 else
322 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
323
324 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
325 }
326
327
328 static int
329 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
330 struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
331 {
332 struct sk_buff *skb;
333 int entries = 0;
334
335 /* no out of order completion */
336 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
337 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
338
339 skb = tq->buf_info[eop_idx].skb;
340 BUG_ON(skb == NULL);
341 tq->buf_info[eop_idx].skb = NULL;
342
343 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
344
345 while (tq->tx_ring.next2comp != eop_idx) {
346 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
347 pdev);
348
349 /* update next2comp w/o tx_lock. Since we are marking more,
350 * instead of less, tx ring entries avail, the worst case is
351 * that the tx routine incorrectly re-queues a pkt due to
352 * insufficient tx ring entries.
353 */
354 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
355 entries++;
356 }
357
358 dev_kfree_skb_any(skb);
359 return entries;
360 }
361
362
363 static int
364 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
365 struct vmxnet3_adapter *adapter)
366 {
367 int completed = 0;
368 union Vmxnet3_GenericDesc *gdesc;
369
370 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
371 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
372 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
373 &gdesc->tcd), tq, adapter->pdev,
374 adapter);
375
376 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
377 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
378 }
379
380 if (completed) {
381 spin_lock(&tq->tx_lock);
382 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
383 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
384 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
385 netif_carrier_ok(adapter->netdev))) {
386 vmxnet3_tq_wake(tq, adapter);
387 }
388 spin_unlock(&tq->tx_lock);
389 }
390 return completed;
391 }
392
393
394 static void
395 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
396 struct vmxnet3_adapter *adapter)
397 {
398 int i;
399
400 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
401 struct vmxnet3_tx_buf_info *tbi;
402
403 tbi = tq->buf_info + tq->tx_ring.next2comp;
404
405 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
406 if (tbi->skb) {
407 dev_kfree_skb_any(tbi->skb);
408 tbi->skb = NULL;
409 }
410 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
411 }
412
413 /* sanity check, verify all buffers are indeed unmapped and freed */
414 for (i = 0; i < tq->tx_ring.size; i++) {
415 BUG_ON(tq->buf_info[i].skb != NULL ||
416 tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
417 }
418
419 tq->tx_ring.gen = VMXNET3_INIT_GEN;
420 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
421
422 tq->comp_ring.gen = VMXNET3_INIT_GEN;
423 tq->comp_ring.next2proc = 0;
424 }
425
426
427 static void
428 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
429 struct vmxnet3_adapter *adapter)
430 {
431 if (tq->tx_ring.base) {
432 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size *
433 sizeof(struct Vmxnet3_TxDesc),
434 tq->tx_ring.base, tq->tx_ring.basePA);
435 tq->tx_ring.base = NULL;
436 }
437 if (tq->data_ring.base) {
438 dma_free_coherent(&adapter->pdev->dev, tq->data_ring.size *
439 sizeof(struct Vmxnet3_TxDataDesc),
440 tq->data_ring.base, tq->data_ring.basePA);
441 tq->data_ring.base = NULL;
442 }
443 if (tq->comp_ring.base) {
444 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size *
445 sizeof(struct Vmxnet3_TxCompDesc),
446 tq->comp_ring.base, tq->comp_ring.basePA);
447 tq->comp_ring.base = NULL;
448 }
449 if (tq->buf_info) {
450 dma_free_coherent(&adapter->pdev->dev,
451 tq->tx_ring.size * sizeof(tq->buf_info[0]),
452 tq->buf_info, tq->buf_info_pa);
453 tq->buf_info = NULL;
454 }
455 }
456
457
458 /* Destroy all tx queues */
459 void
460 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
461 {
462 int i;
463
464 for (i = 0; i < adapter->num_tx_queues; i++)
465 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
466 }
467
468
469 static void
470 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
471 struct vmxnet3_adapter *adapter)
472 {
473 int i;
474
475 /* reset the tx ring contents to 0 and reset the tx ring states */
476 memset(tq->tx_ring.base, 0, tq->tx_ring.size *
477 sizeof(struct Vmxnet3_TxDesc));
478 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
479 tq->tx_ring.gen = VMXNET3_INIT_GEN;
480
481 memset(tq->data_ring.base, 0, tq->data_ring.size *
482 sizeof(struct Vmxnet3_TxDataDesc));
483
484 /* reset the tx comp ring contents to 0 and reset comp ring states */
485 memset(tq->comp_ring.base, 0, tq->comp_ring.size *
486 sizeof(struct Vmxnet3_TxCompDesc));
487 tq->comp_ring.next2proc = 0;
488 tq->comp_ring.gen = VMXNET3_INIT_GEN;
489
490 /* reset the bookkeeping data */
491 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
492 for (i = 0; i < tq->tx_ring.size; i++)
493 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
494
495 /* stats are not reset */
496 }
497
498
499 static int
500 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
501 struct vmxnet3_adapter *adapter)
502 {
503 size_t sz;
504
505 BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
506 tq->comp_ring.base || tq->buf_info);
507
508 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
509 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc),
510 &tq->tx_ring.basePA, GFP_KERNEL);
511 if (!tq->tx_ring.base) {
512 netdev_err(adapter->netdev, "failed to allocate tx ring\n");
513 goto err;
514 }
515
516 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
517 tq->data_ring.size * sizeof(struct Vmxnet3_TxDataDesc),
518 &tq->data_ring.basePA, GFP_KERNEL);
519 if (!tq->data_ring.base) {
520 netdev_err(adapter->netdev, "failed to allocate data ring\n");
521 goto err;
522 }
523
524 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
525 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
526 &tq->comp_ring.basePA, GFP_KERNEL);
527 if (!tq->comp_ring.base) {
528 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
529 goto err;
530 }
531
532 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]);
533 tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz,
534 &tq->buf_info_pa, GFP_KERNEL);
535 if (!tq->buf_info)
536 goto err;
537
538 return 0;
539
540 err:
541 vmxnet3_tq_destroy(tq, adapter);
542 return -ENOMEM;
543 }
544
545 static void
546 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
547 {
548 int i;
549
550 for (i = 0; i < adapter->num_tx_queues; i++)
551 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
552 }
553
554 /*
555 * starting from ring->next2fill, allocate rx buffers for the given ring
556 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
557 * are allocated or allocation fails
558 */
559
560 static int
561 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
562 int num_to_alloc, struct vmxnet3_adapter *adapter)
563 {
564 int num_allocated = 0;
565 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
566 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
567 u32 val;
568
569 while (num_allocated <= num_to_alloc) {
570 struct vmxnet3_rx_buf_info *rbi;
571 union Vmxnet3_GenericDesc *gd;
572
573 rbi = rbi_base + ring->next2fill;
574 gd = ring->base + ring->next2fill;
575
576 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
577 if (rbi->skb == NULL) {
578 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
579 rbi->len,
580 GFP_KERNEL);
581 if (unlikely(rbi->skb == NULL)) {
582 rq->stats.rx_buf_alloc_failure++;
583 break;
584 }
585
586 rbi->dma_addr = dma_map_single(
587 &adapter->pdev->dev,
588 rbi->skb->data, rbi->len,
589 PCI_DMA_FROMDEVICE);
590 if (dma_mapping_error(&adapter->pdev->dev,
591 rbi->dma_addr)) {
592 dev_kfree_skb_any(rbi->skb);
593 rq->stats.rx_buf_alloc_failure++;
594 break;
595 }
596 } else {
597 /* rx buffer skipped by the device */
598 }
599 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
600 } else {
601 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
602 rbi->len != PAGE_SIZE);
603
604 if (rbi->page == NULL) {
605 rbi->page = alloc_page(GFP_ATOMIC);
606 if (unlikely(rbi->page == NULL)) {
607 rq->stats.rx_buf_alloc_failure++;
608 break;
609 }
610 rbi->dma_addr = dma_map_page(
611 &adapter->pdev->dev,
612 rbi->page, 0, PAGE_SIZE,
613 PCI_DMA_FROMDEVICE);
614 if (dma_mapping_error(&adapter->pdev->dev,
615 rbi->dma_addr)) {
616 put_page(rbi->page);
617 rq->stats.rx_buf_alloc_failure++;
618 break;
619 }
620 } else {
621 /* rx buffers skipped by the device */
622 }
623 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
624 }
625
626 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
627 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
628 | val | rbi->len);
629
630 /* Fill the last buffer but dont mark it ready, or else the
631 * device will think that the queue is full */
632 if (num_allocated == num_to_alloc)
633 break;
634
635 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
636 num_allocated++;
637 vmxnet3_cmd_ring_adv_next2fill(ring);
638 }
639
640 netdev_dbg(adapter->netdev,
641 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
642 num_allocated, ring->next2fill, ring->next2comp);
643
644 /* so that the device can distinguish a full ring and an empty ring */
645 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
646
647 return num_allocated;
648 }
649
650
651 static void
652 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
653 struct vmxnet3_rx_buf_info *rbi)
654 {
655 struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
656 skb_shinfo(skb)->nr_frags;
657
658 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
659
660 __skb_frag_set_page(frag, rbi->page);
661 frag->page_offset = 0;
662 skb_frag_size_set(frag, rcd->len);
663 skb->data_len += rcd->len;
664 skb->truesize += PAGE_SIZE;
665 skb_shinfo(skb)->nr_frags++;
666 }
667
668
669 static int
670 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
671 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
672 struct vmxnet3_adapter *adapter)
673 {
674 u32 dw2, len;
675 unsigned long buf_offset;
676 int i;
677 union Vmxnet3_GenericDesc *gdesc;
678 struct vmxnet3_tx_buf_info *tbi = NULL;
679
680 BUG_ON(ctx->copy_size > skb_headlen(skb));
681
682 /* use the previous gen bit for the SOP desc */
683 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
684
685 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
686 gdesc = ctx->sop_txd; /* both loops below can be skipped */
687
688 /* no need to map the buffer if headers are copied */
689 if (ctx->copy_size) {
690 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
691 tq->tx_ring.next2fill *
692 sizeof(struct Vmxnet3_TxDataDesc));
693 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
694 ctx->sop_txd->dword[3] = 0;
695
696 tbi = tq->buf_info + tq->tx_ring.next2fill;
697 tbi->map_type = VMXNET3_MAP_NONE;
698
699 netdev_dbg(adapter->netdev,
700 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
701 tq->tx_ring.next2fill,
702 le64_to_cpu(ctx->sop_txd->txd.addr),
703 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
704 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
705
706 /* use the right gen for non-SOP desc */
707 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
708 }
709
710 /* linear part can use multiple tx desc if it's big */
711 len = skb_headlen(skb) - ctx->copy_size;
712 buf_offset = ctx->copy_size;
713 while (len) {
714 u32 buf_size;
715
716 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
717 buf_size = len;
718 dw2 |= len;
719 } else {
720 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
721 /* spec says that for TxDesc.len, 0 == 2^14 */
722 }
723
724 tbi = tq->buf_info + tq->tx_ring.next2fill;
725 tbi->map_type = VMXNET3_MAP_SINGLE;
726 tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
727 skb->data + buf_offset, buf_size,
728 PCI_DMA_TODEVICE);
729 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
730 return -EFAULT;
731
732 tbi->len = buf_size;
733
734 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
735 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
736
737 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
738 gdesc->dword[2] = cpu_to_le32(dw2);
739 gdesc->dword[3] = 0;
740
741 netdev_dbg(adapter->netdev,
742 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
743 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
744 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
745 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
746 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
747
748 len -= buf_size;
749 buf_offset += buf_size;
750 }
751
752 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
753 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
754 u32 buf_size;
755
756 buf_offset = 0;
757 len = skb_frag_size(frag);
758 while (len) {
759 tbi = tq->buf_info + tq->tx_ring.next2fill;
760 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
761 buf_size = len;
762 dw2 |= len;
763 } else {
764 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
765 /* spec says that for TxDesc.len, 0 == 2^14 */
766 }
767 tbi->map_type = VMXNET3_MAP_PAGE;
768 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
769 buf_offset, buf_size,
770 DMA_TO_DEVICE);
771 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
772 return -EFAULT;
773
774 tbi->len = buf_size;
775
776 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
777 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
778
779 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
780 gdesc->dword[2] = cpu_to_le32(dw2);
781 gdesc->dword[3] = 0;
782
783 netdev_dbg(adapter->netdev,
784 "txd[%u]: 0x%llx %u %u\n",
785 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
786 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
787 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
788 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
789
790 len -= buf_size;
791 buf_offset += buf_size;
792 }
793 }
794
795 ctx->eop_txd = gdesc;
796
797 /* set the last buf_info for the pkt */
798 tbi->skb = skb;
799 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
800
801 return 0;
802 }
803
804
805 /* Init all tx queues */
806 static void
807 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
808 {
809 int i;
810
811 for (i = 0; i < adapter->num_tx_queues; i++)
812 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
813 }
814
815
816 /*
817 * parse relevant protocol headers:
818 * For a tso pkt, relevant headers are L2/3/4 including options
819 * For a pkt requesting csum offloading, they are L2/3 and may include L4
820 * if it's a TCP/UDP pkt
821 *
822 * Returns:
823 * -1: error happens during parsing
824 * 0: protocol headers parsed, but too big to be copied
825 * 1: protocol headers parsed and copied
826 *
827 * Other effects:
828 * 1. related *ctx fields are updated.
829 * 2. ctx->copy_size is # of bytes copied
830 * 3. the portion to be copied is guaranteed to be in the linear part
831 *
832 */
833 static int
834 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
835 struct vmxnet3_tx_ctx *ctx,
836 struct vmxnet3_adapter *adapter)
837 {
838 u8 protocol = 0;
839
840 if (ctx->mss) { /* TSO */
841 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
842 ctx->l4_hdr_size = tcp_hdrlen(skb);
843 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
844 } else {
845 if (skb->ip_summed == CHECKSUM_PARTIAL) {
846 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
847
848 if (ctx->ipv4) {
849 const struct iphdr *iph = ip_hdr(skb);
850
851 protocol = iph->protocol;
852 } else if (ctx->ipv6) {
853 const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
854
855 protocol = ipv6h->nexthdr;
856 }
857
858 switch (protocol) {
859 case IPPROTO_TCP:
860 ctx->l4_hdr_size = tcp_hdrlen(skb);
861 break;
862 case IPPROTO_UDP:
863 ctx->l4_hdr_size = sizeof(struct udphdr);
864 break;
865 default:
866 ctx->l4_hdr_size = 0;
867 break;
868 }
869
870 ctx->copy_size = min(ctx->eth_ip_hdr_size +
871 ctx->l4_hdr_size, skb->len);
872 } else {
873 ctx->eth_ip_hdr_size = 0;
874 ctx->l4_hdr_size = 0;
875 /* copy as much as allowed */
876 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
877 , skb_headlen(skb));
878 }
879
880 if (skb->len <= VMXNET3_HDR_COPY_SIZE)
881 ctx->copy_size = skb->len;
882
883 /* make sure headers are accessible directly */
884 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
885 goto err;
886 }
887
888 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
889 tq->stats.oversized_hdr++;
890 ctx->copy_size = 0;
891 return 0;
892 }
893
894 return 1;
895 err:
896 return -1;
897 }
898
899 /*
900 * copy relevant protocol headers to the transmit ring:
901 * For a tso pkt, relevant headers are L2/3/4 including options
902 * For a pkt requesting csum offloading, they are L2/3 and may include L4
903 * if it's a TCP/UDP pkt
904 *
905 *
906 * Note that this requires that vmxnet3_parse_hdr be called first to set the
907 * appropriate bits in ctx first
908 */
909 static void
910 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
911 struct vmxnet3_tx_ctx *ctx,
912 struct vmxnet3_adapter *adapter)
913 {
914 struct Vmxnet3_TxDataDesc *tdd;
915
916 tdd = tq->data_ring.base + tq->tx_ring.next2fill;
917
918 memcpy(tdd->data, skb->data, ctx->copy_size);
919 netdev_dbg(adapter->netdev,
920 "copy %u bytes to dataRing[%u]\n",
921 ctx->copy_size, tq->tx_ring.next2fill);
922 }
923
924
925 static void
926 vmxnet3_prepare_tso(struct sk_buff *skb,
927 struct vmxnet3_tx_ctx *ctx)
928 {
929 struct tcphdr *tcph = tcp_hdr(skb);
930
931 if (ctx->ipv4) {
932 struct iphdr *iph = ip_hdr(skb);
933
934 iph->check = 0;
935 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
936 IPPROTO_TCP, 0);
937 } else if (ctx->ipv6) {
938 struct ipv6hdr *iph = ipv6_hdr(skb);
939
940 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
941 IPPROTO_TCP, 0);
942 }
943 }
944
945 static int txd_estimate(const struct sk_buff *skb)
946 {
947 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
948 int i;
949
950 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
951 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
952
953 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
954 }
955 return count;
956 }
957
958 /*
959 * Transmits a pkt thru a given tq
960 * Returns:
961 * NETDEV_TX_OK: descriptors are setup successfully
962 * NETDEV_TX_OK: error occurred, the pkt is dropped
963 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
964 *
965 * Side-effects:
966 * 1. tx ring may be changed
967 * 2. tq stats may be updated accordingly
968 * 3. shared->txNumDeferred may be updated
969 */
970
971 static int
972 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
973 struct vmxnet3_adapter *adapter, struct net_device *netdev)
974 {
975 int ret;
976 u32 count;
977 unsigned long flags;
978 struct vmxnet3_tx_ctx ctx;
979 union Vmxnet3_GenericDesc *gdesc;
980 #ifdef __BIG_ENDIAN_BITFIELD
981 /* Use temporary descriptor to avoid touching bits multiple times */
982 union Vmxnet3_GenericDesc tempTxDesc;
983 #endif
984
985 count = txd_estimate(skb);
986
987 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
988 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
989
990 ctx.mss = skb_shinfo(skb)->gso_size;
991 if (ctx.mss) {
992 if (skb_header_cloned(skb)) {
993 if (unlikely(pskb_expand_head(skb, 0, 0,
994 GFP_ATOMIC) != 0)) {
995 tq->stats.drop_tso++;
996 goto drop_pkt;
997 }
998 tq->stats.copy_skb_header++;
999 }
1000 vmxnet3_prepare_tso(skb, &ctx);
1001 } else {
1002 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
1003
1004 /* non-tso pkts must not use more than
1005 * VMXNET3_MAX_TXD_PER_PKT entries
1006 */
1007 if (skb_linearize(skb) != 0) {
1008 tq->stats.drop_too_many_frags++;
1009 goto drop_pkt;
1010 }
1011 tq->stats.linearized++;
1012
1013 /* recalculate the # of descriptors to use */
1014 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1015 }
1016 }
1017
1018 ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter);
1019 if (ret >= 0) {
1020 BUG_ON(ret <= 0 && ctx.copy_size != 0);
1021 /* hdrs parsed, check against other limits */
1022 if (ctx.mss) {
1023 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
1024 VMXNET3_MAX_TX_BUF_SIZE)) {
1025 goto hdr_too_big;
1026 }
1027 } else {
1028 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1029 if (unlikely(ctx.eth_ip_hdr_size +
1030 skb->csum_offset >
1031 VMXNET3_MAX_CSUM_OFFSET)) {
1032 goto hdr_too_big;
1033 }
1034 }
1035 }
1036 } else {
1037 tq->stats.drop_hdr_inspect_err++;
1038 goto drop_pkt;
1039 }
1040
1041 spin_lock_irqsave(&tq->tx_lock, flags);
1042
1043 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
1044 tq->stats.tx_ring_full++;
1045 netdev_dbg(adapter->netdev,
1046 "tx queue stopped on %s, next2comp %u"
1047 " next2fill %u\n", adapter->netdev->name,
1048 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
1049
1050 vmxnet3_tq_stop(tq, adapter);
1051 spin_unlock_irqrestore(&tq->tx_lock, flags);
1052 return NETDEV_TX_BUSY;
1053 }
1054
1055
1056 vmxnet3_copy_hdr(skb, tq, &ctx, adapter);
1057
1058 /* fill tx descs related to addr & len */
1059 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter))
1060 goto unlock_drop_pkt;
1061
1062 /* setup the EOP desc */
1063 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1064
1065 /* setup the SOP desc */
1066 #ifdef __BIG_ENDIAN_BITFIELD
1067 gdesc = &tempTxDesc;
1068 gdesc->dword[2] = ctx.sop_txd->dword[2];
1069 gdesc->dword[3] = ctx.sop_txd->dword[3];
1070 #else
1071 gdesc = ctx.sop_txd;
1072 #endif
1073 if (ctx.mss) {
1074 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1075 gdesc->txd.om = VMXNET3_OM_TSO;
1076 gdesc->txd.msscof = ctx.mss;
1077 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1078 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1079 } else {
1080 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1081 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1082 gdesc->txd.om = VMXNET3_OM_CSUM;
1083 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1084 skb->csum_offset;
1085 } else {
1086 gdesc->txd.om = 0;
1087 gdesc->txd.msscof = 0;
1088 }
1089 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1090 }
1091
1092 if (skb_vlan_tag_present(skb)) {
1093 gdesc->txd.ti = 1;
1094 gdesc->txd.tci = skb_vlan_tag_get(skb);
1095 }
1096
1097 /* finally flips the GEN bit of the SOP desc. */
1098 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1099 VMXNET3_TXD_GEN);
1100 #ifdef __BIG_ENDIAN_BITFIELD
1101 /* Finished updating in bitfields of Tx Desc, so write them in original
1102 * place.
1103 */
1104 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1105 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1106 gdesc = ctx.sop_txd;
1107 #endif
1108 netdev_dbg(adapter->netdev,
1109 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1110 (u32)(ctx.sop_txd -
1111 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1112 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1113
1114 spin_unlock_irqrestore(&tq->tx_lock, flags);
1115
1116 if (le32_to_cpu(tq->shared->txNumDeferred) >=
1117 le32_to_cpu(tq->shared->txThreshold)) {
1118 tq->shared->txNumDeferred = 0;
1119 VMXNET3_WRITE_BAR0_REG(adapter,
1120 VMXNET3_REG_TXPROD + tq->qid * 8,
1121 tq->tx_ring.next2fill);
1122 }
1123
1124 return NETDEV_TX_OK;
1125
1126 hdr_too_big:
1127 tq->stats.drop_oversized_hdr++;
1128 unlock_drop_pkt:
1129 spin_unlock_irqrestore(&tq->tx_lock, flags);
1130 drop_pkt:
1131 tq->stats.drop_total++;
1132 dev_kfree_skb_any(skb);
1133 return NETDEV_TX_OK;
1134 }
1135
1136
1137 static netdev_tx_t
1138 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1139 {
1140 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1141
1142 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1143 return vmxnet3_tq_xmit(skb,
1144 &adapter->tx_queue[skb->queue_mapping],
1145 adapter, netdev);
1146 }
1147
1148
1149 static void
1150 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1151 struct sk_buff *skb,
1152 union Vmxnet3_GenericDesc *gdesc)
1153 {
1154 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1155 /* typical case: TCP/UDP over IP and both csums are correct */
1156 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1157 VMXNET3_RCD_CSUM_OK) {
1158 skb->ip_summed = CHECKSUM_UNNECESSARY;
1159 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1160 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6));
1161 BUG_ON(gdesc->rcd.frg);
1162 } else {
1163 if (gdesc->rcd.csum) {
1164 skb->csum = htons(gdesc->rcd.csum);
1165 skb->ip_summed = CHECKSUM_PARTIAL;
1166 } else {
1167 skb_checksum_none_assert(skb);
1168 }
1169 }
1170 } else {
1171 skb_checksum_none_assert(skb);
1172 }
1173 }
1174
1175
1176 static void
1177 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1178 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1179 {
1180 rq->stats.drop_err++;
1181 if (!rcd->fcs)
1182 rq->stats.drop_fcs++;
1183
1184 rq->stats.drop_total++;
1185
1186 /*
1187 * We do not unmap and chain the rx buffer to the skb.
1188 * We basically pretend this buffer is not used and will be recycled
1189 * by vmxnet3_rq_alloc_rx_buf()
1190 */
1191
1192 /*
1193 * ctx->skb may be NULL if this is the first and the only one
1194 * desc for the pkt
1195 */
1196 if (ctx->skb)
1197 dev_kfree_skb_irq(ctx->skb);
1198
1199 ctx->skb = NULL;
1200 }
1201
1202
1203 static u32
1204 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
1205 union Vmxnet3_GenericDesc *gdesc)
1206 {
1207 u32 hlen, maplen;
1208 union {
1209 void *ptr;
1210 struct ethhdr *eth;
1211 struct iphdr *ipv4;
1212 struct ipv6hdr *ipv6;
1213 struct tcphdr *tcp;
1214 } hdr;
1215 BUG_ON(gdesc->rcd.tcp == 0);
1216
1217 maplen = skb_headlen(skb);
1218 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
1219 return 0;
1220
1221 hdr.eth = eth_hdr(skb);
1222 if (gdesc->rcd.v4) {
1223 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP));
1224 hdr.ptr += sizeof(struct ethhdr);
1225 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
1226 hlen = hdr.ipv4->ihl << 2;
1227 hdr.ptr += hdr.ipv4->ihl << 2;
1228 } else if (gdesc->rcd.v6) {
1229 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6));
1230 hdr.ptr += sizeof(struct ethhdr);
1231 /* Use an estimated value, since we also need to handle
1232 * TSO case.
1233 */
1234 if (hdr.ipv6->nexthdr != IPPROTO_TCP)
1235 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
1236 hlen = sizeof(struct ipv6hdr);
1237 hdr.ptr += sizeof(struct ipv6hdr);
1238 } else {
1239 /* Non-IP pkt, dont estimate header length */
1240 return 0;
1241 }
1242
1243 if (hlen + sizeof(struct tcphdr) > maplen)
1244 return 0;
1245
1246 return (hlen + (hdr.tcp->doff << 2));
1247 }
1248
1249 static int
1250 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1251 struct vmxnet3_adapter *adapter, int quota)
1252 {
1253 static const u32 rxprod_reg[2] = {
1254 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1255 };
1256 u32 num_pkts = 0;
1257 bool skip_page_frags = false;
1258 struct Vmxnet3_RxCompDesc *rcd;
1259 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1260 u16 segCnt = 0, mss = 0;
1261 #ifdef __BIG_ENDIAN_BITFIELD
1262 struct Vmxnet3_RxDesc rxCmdDesc;
1263 struct Vmxnet3_RxCompDesc rxComp;
1264 #endif
1265 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1266 &rxComp);
1267 while (rcd->gen == rq->comp_ring.gen) {
1268 struct vmxnet3_rx_buf_info *rbi;
1269 struct sk_buff *skb, *new_skb = NULL;
1270 struct page *new_page = NULL;
1271 dma_addr_t new_dma_addr;
1272 int num_to_alloc;
1273 struct Vmxnet3_RxDesc *rxd;
1274 u32 idx, ring_idx;
1275 struct vmxnet3_cmd_ring *ring = NULL;
1276 if (num_pkts >= quota) {
1277 /* we may stop even before we see the EOP desc of
1278 * the current pkt
1279 */
1280 break;
1281 }
1282 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1283 idx = rcd->rxdIdx;
1284 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1285 ring = rq->rx_ring + ring_idx;
1286 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1287 &rxCmdDesc);
1288 rbi = rq->buf_info[ring_idx] + idx;
1289
1290 BUG_ON(rxd->addr != rbi->dma_addr ||
1291 rxd->len != rbi->len);
1292
1293 if (unlikely(rcd->eop && rcd->err)) {
1294 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1295 goto rcd_done;
1296 }
1297
1298 if (rcd->sop) { /* first buf of the pkt */
1299 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1300 rcd->rqID != rq->qid);
1301
1302 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1303 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1304
1305 if (unlikely(rcd->len == 0)) {
1306 /* Pretend the rx buffer is skipped. */
1307 BUG_ON(!(rcd->sop && rcd->eop));
1308 netdev_dbg(adapter->netdev,
1309 "rxRing[%u][%u] 0 length\n",
1310 ring_idx, idx);
1311 goto rcd_done;
1312 }
1313
1314 skip_page_frags = false;
1315 ctx->skb = rbi->skb;
1316 new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1317 rbi->len);
1318 if (new_skb == NULL) {
1319 /* Skb allocation failed, do not handover this
1320 * skb to stack. Reuse it. Drop the existing pkt
1321 */
1322 rq->stats.rx_buf_alloc_failure++;
1323 ctx->skb = NULL;
1324 rq->stats.drop_total++;
1325 skip_page_frags = true;
1326 goto rcd_done;
1327 }
1328 new_dma_addr = dma_map_single(&adapter->pdev->dev,
1329 new_skb->data, rbi->len,
1330 PCI_DMA_FROMDEVICE);
1331 if (dma_mapping_error(&adapter->pdev->dev,
1332 new_dma_addr)) {
1333 dev_kfree_skb(new_skb);
1334 /* Skb allocation failed, do not handover this
1335 * skb to stack. Reuse it. Drop the existing pkt
1336 */
1337 rq->stats.rx_buf_alloc_failure++;
1338 ctx->skb = NULL;
1339 rq->stats.drop_total++;
1340 skip_page_frags = true;
1341 goto rcd_done;
1342 }
1343
1344 dma_unmap_single(&adapter->pdev->dev, rbi->dma_addr,
1345 rbi->len,
1346 PCI_DMA_FROMDEVICE);
1347
1348 #ifdef VMXNET3_RSS
1349 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1350 (adapter->netdev->features & NETIF_F_RXHASH))
1351 skb_set_hash(ctx->skb,
1352 le32_to_cpu(rcd->rssHash),
1353 PKT_HASH_TYPE_L3);
1354 #endif
1355 skb_put(ctx->skb, rcd->len);
1356
1357 /* Immediate refill */
1358 rbi->skb = new_skb;
1359 rbi->dma_addr = new_dma_addr;
1360 rxd->addr = cpu_to_le64(rbi->dma_addr);
1361 rxd->len = rbi->len;
1362 if (adapter->version == 2 &&
1363 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
1364 struct Vmxnet3_RxCompDescExt *rcdlro;
1365 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd;
1366
1367 segCnt = rcdlro->segCnt;
1368 BUG_ON(segCnt <= 1);
1369 mss = rcdlro->mss;
1370 if (unlikely(segCnt <= 1))
1371 segCnt = 0;
1372 } else {
1373 segCnt = 0;
1374 }
1375 } else {
1376 BUG_ON(ctx->skb == NULL && !skip_page_frags);
1377
1378 /* non SOP buffer must be type 1 in most cases */
1379 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1380 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1381
1382 /* If an sop buffer was dropped, skip all
1383 * following non-sop fragments. They will be reused.
1384 */
1385 if (skip_page_frags)
1386 goto rcd_done;
1387
1388 if (rcd->len) {
1389 new_page = alloc_page(GFP_ATOMIC);
1390 /* Replacement page frag could not be allocated.
1391 * Reuse this page. Drop the pkt and free the
1392 * skb which contained this page as a frag. Skip
1393 * processing all the following non-sop frags.
1394 */
1395 if (unlikely(!new_page)) {
1396 rq->stats.rx_buf_alloc_failure++;
1397 dev_kfree_skb(ctx->skb);
1398 ctx->skb = NULL;
1399 skip_page_frags = true;
1400 goto rcd_done;
1401 }
1402 new_dma_addr = dma_map_page(&adapter->pdev->dev,
1403 new_page,
1404 0, PAGE_SIZE,
1405 PCI_DMA_FROMDEVICE);
1406 if (dma_mapping_error(&adapter->pdev->dev,
1407 new_dma_addr)) {
1408 put_page(new_page);
1409 rq->stats.rx_buf_alloc_failure++;
1410 dev_kfree_skb(ctx->skb);
1411 ctx->skb = NULL;
1412 skip_page_frags = true;
1413 goto rcd_done;
1414 }
1415
1416 dma_unmap_page(&adapter->pdev->dev,
1417 rbi->dma_addr, rbi->len,
1418 PCI_DMA_FROMDEVICE);
1419
1420 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1421
1422 /* Immediate refill */
1423 rbi->page = new_page;
1424 rbi->dma_addr = new_dma_addr;
1425 rxd->addr = cpu_to_le64(rbi->dma_addr);
1426 rxd->len = rbi->len;
1427 }
1428 }
1429
1430
1431 skb = ctx->skb;
1432 if (rcd->eop) {
1433 u32 mtu = adapter->netdev->mtu;
1434 skb->len += skb->data_len;
1435
1436 vmxnet3_rx_csum(adapter, skb,
1437 (union Vmxnet3_GenericDesc *)rcd);
1438 skb->protocol = eth_type_trans(skb, adapter->netdev);
1439 if (!rcd->tcp || !adapter->lro)
1440 goto not_lro;
1441
1442 if (segCnt != 0 && mss != 0) {
1443 skb_shinfo(skb)->gso_type = rcd->v4 ?
1444 SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1445 skb_shinfo(skb)->gso_size = mss;
1446 skb_shinfo(skb)->gso_segs = segCnt;
1447 } else if (segCnt != 0 || skb->len > mtu) {
1448 u32 hlen;
1449
1450 hlen = vmxnet3_get_hdr_len(adapter, skb,
1451 (union Vmxnet3_GenericDesc *)rcd);
1452 if (hlen == 0)
1453 goto not_lro;
1454
1455 skb_shinfo(skb)->gso_type =
1456 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1457 if (segCnt != 0) {
1458 skb_shinfo(skb)->gso_segs = segCnt;
1459 skb_shinfo(skb)->gso_size =
1460 DIV_ROUND_UP(skb->len -
1461 hlen, segCnt);
1462 } else {
1463 skb_shinfo(skb)->gso_size = mtu - hlen;
1464 }
1465 }
1466 not_lro:
1467 if (unlikely(rcd->ts))
1468 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1469
1470 if (adapter->netdev->features & NETIF_F_LRO)
1471 netif_receive_skb(skb);
1472 else
1473 napi_gro_receive(&rq->napi, skb);
1474
1475 ctx->skb = NULL;
1476 num_pkts++;
1477 }
1478
1479 rcd_done:
1480 /* device may have skipped some rx descs */
1481 ring->next2comp = idx;
1482 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1483 ring = rq->rx_ring + ring_idx;
1484 while (num_to_alloc) {
1485 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1486 &rxCmdDesc);
1487 BUG_ON(!rxd->addr);
1488
1489 /* Recv desc is ready to be used by the device */
1490 rxd->gen = ring->gen;
1491 vmxnet3_cmd_ring_adv_next2fill(ring);
1492 num_to_alloc--;
1493 }
1494
1495 /* if needed, update the register */
1496 if (unlikely(rq->shared->updateRxProd)) {
1497 VMXNET3_WRITE_BAR0_REG(adapter,
1498 rxprod_reg[ring_idx] + rq->qid * 8,
1499 ring->next2fill);
1500 }
1501
1502 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1503 vmxnet3_getRxComp(rcd,
1504 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1505 }
1506
1507 return num_pkts;
1508 }
1509
1510
1511 static void
1512 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1513 struct vmxnet3_adapter *adapter)
1514 {
1515 u32 i, ring_idx;
1516 struct Vmxnet3_RxDesc *rxd;
1517
1518 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1519 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1520 #ifdef __BIG_ENDIAN_BITFIELD
1521 struct Vmxnet3_RxDesc rxDesc;
1522 #endif
1523 vmxnet3_getRxDesc(rxd,
1524 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1525
1526 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1527 rq->buf_info[ring_idx][i].skb) {
1528 dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1529 rxd->len, PCI_DMA_FROMDEVICE);
1530 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1531 rq->buf_info[ring_idx][i].skb = NULL;
1532 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1533 rq->buf_info[ring_idx][i].page) {
1534 dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1535 rxd->len, PCI_DMA_FROMDEVICE);
1536 put_page(rq->buf_info[ring_idx][i].page);
1537 rq->buf_info[ring_idx][i].page = NULL;
1538 }
1539 }
1540
1541 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1542 rq->rx_ring[ring_idx].next2fill =
1543 rq->rx_ring[ring_idx].next2comp = 0;
1544 }
1545
1546 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1547 rq->comp_ring.next2proc = 0;
1548 }
1549
1550
1551 static void
1552 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1553 {
1554 int i;
1555
1556 for (i = 0; i < adapter->num_rx_queues; i++)
1557 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1558 }
1559
1560
1561 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1562 struct vmxnet3_adapter *adapter)
1563 {
1564 int i;
1565 int j;
1566
1567 /* all rx buffers must have already been freed */
1568 for (i = 0; i < 2; i++) {
1569 if (rq->buf_info[i]) {
1570 for (j = 0; j < rq->rx_ring[i].size; j++)
1571 BUG_ON(rq->buf_info[i][j].page != NULL);
1572 }
1573 }
1574
1575
1576 for (i = 0; i < 2; i++) {
1577 if (rq->rx_ring[i].base) {
1578 dma_free_coherent(&adapter->pdev->dev,
1579 rq->rx_ring[i].size
1580 * sizeof(struct Vmxnet3_RxDesc),
1581 rq->rx_ring[i].base,
1582 rq->rx_ring[i].basePA);
1583 rq->rx_ring[i].base = NULL;
1584 }
1585 rq->buf_info[i] = NULL;
1586 }
1587
1588 if (rq->comp_ring.base) {
1589 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
1590 * sizeof(struct Vmxnet3_RxCompDesc),
1591 rq->comp_ring.base, rq->comp_ring.basePA);
1592 rq->comp_ring.base = NULL;
1593 }
1594
1595 if (rq->buf_info[0]) {
1596 size_t sz = sizeof(struct vmxnet3_rx_buf_info) *
1597 (rq->rx_ring[0].size + rq->rx_ring[1].size);
1598 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
1599 rq->buf_info_pa);
1600 }
1601 }
1602
1603
1604 static int
1605 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1606 struct vmxnet3_adapter *adapter)
1607 {
1608 int i;
1609
1610 /* initialize buf_info */
1611 for (i = 0; i < rq->rx_ring[0].size; i++) {
1612
1613 /* 1st buf for a pkt is skbuff */
1614 if (i % adapter->rx_buf_per_pkt == 0) {
1615 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1616 rq->buf_info[0][i].len = adapter->skb_buf_size;
1617 } else { /* subsequent bufs for a pkt is frag */
1618 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1619 rq->buf_info[0][i].len = PAGE_SIZE;
1620 }
1621 }
1622 for (i = 0; i < rq->rx_ring[1].size; i++) {
1623 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1624 rq->buf_info[1][i].len = PAGE_SIZE;
1625 }
1626
1627 /* reset internal state and allocate buffers for both rings */
1628 for (i = 0; i < 2; i++) {
1629 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1630
1631 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1632 sizeof(struct Vmxnet3_RxDesc));
1633 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1634 }
1635 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1636 adapter) == 0) {
1637 /* at least has 1 rx buffer for the 1st ring */
1638 return -ENOMEM;
1639 }
1640 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1641
1642 /* reset the comp ring */
1643 rq->comp_ring.next2proc = 0;
1644 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1645 sizeof(struct Vmxnet3_RxCompDesc));
1646 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1647
1648 /* reset rxctx */
1649 rq->rx_ctx.skb = NULL;
1650
1651 /* stats are not reset */
1652 return 0;
1653 }
1654
1655
1656 static int
1657 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1658 {
1659 int i, err = 0;
1660
1661 for (i = 0; i < adapter->num_rx_queues; i++) {
1662 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1663 if (unlikely(err)) {
1664 dev_err(&adapter->netdev->dev, "%s: failed to "
1665 "initialize rx queue%i\n",
1666 adapter->netdev->name, i);
1667 break;
1668 }
1669 }
1670 return err;
1671
1672 }
1673
1674
1675 static int
1676 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1677 {
1678 int i;
1679 size_t sz;
1680 struct vmxnet3_rx_buf_info *bi;
1681
1682 for (i = 0; i < 2; i++) {
1683
1684 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1685 rq->rx_ring[i].base = dma_alloc_coherent(
1686 &adapter->pdev->dev, sz,
1687 &rq->rx_ring[i].basePA,
1688 GFP_KERNEL);
1689 if (!rq->rx_ring[i].base) {
1690 netdev_err(adapter->netdev,
1691 "failed to allocate rx ring %d\n", i);
1692 goto err;
1693 }
1694 }
1695
1696 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1697 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
1698 &rq->comp_ring.basePA,
1699 GFP_KERNEL);
1700 if (!rq->comp_ring.base) {
1701 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
1702 goto err;
1703 }
1704
1705 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1706 rq->rx_ring[1].size);
1707 bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa,
1708 GFP_KERNEL);
1709 if (!bi)
1710 goto err;
1711
1712 rq->buf_info[0] = bi;
1713 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1714
1715 return 0;
1716
1717 err:
1718 vmxnet3_rq_destroy(rq, adapter);
1719 return -ENOMEM;
1720 }
1721
1722
1723 static int
1724 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1725 {
1726 int i, err = 0;
1727
1728 for (i = 0; i < adapter->num_rx_queues; i++) {
1729 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1730 if (unlikely(err)) {
1731 dev_err(&adapter->netdev->dev,
1732 "%s: failed to create rx queue%i\n",
1733 adapter->netdev->name, i);
1734 goto err_out;
1735 }
1736 }
1737 return err;
1738 err_out:
1739 vmxnet3_rq_destroy_all(adapter);
1740 return err;
1741
1742 }
1743
1744 /* Multiple queue aware polling function for tx and rx */
1745
1746 static int
1747 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1748 {
1749 int rcd_done = 0, i;
1750 if (unlikely(adapter->shared->ecr))
1751 vmxnet3_process_events(adapter);
1752 for (i = 0; i < adapter->num_tx_queues; i++)
1753 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1754
1755 for (i = 0; i < adapter->num_rx_queues; i++)
1756 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1757 adapter, budget);
1758 return rcd_done;
1759 }
1760
1761
1762 static int
1763 vmxnet3_poll(struct napi_struct *napi, int budget)
1764 {
1765 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1766 struct vmxnet3_rx_queue, napi);
1767 int rxd_done;
1768
1769 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1770
1771 if (rxd_done < budget) {
1772 napi_complete(napi);
1773 vmxnet3_enable_all_intrs(rx_queue->adapter);
1774 }
1775 return rxd_done;
1776 }
1777
1778 /*
1779 * NAPI polling function for MSI-X mode with multiple Rx queues
1780 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1781 */
1782
1783 static int
1784 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1785 {
1786 struct vmxnet3_rx_queue *rq = container_of(napi,
1787 struct vmxnet3_rx_queue, napi);
1788 struct vmxnet3_adapter *adapter = rq->adapter;
1789 int rxd_done;
1790
1791 /* When sharing interrupt with corresponding tx queue, process
1792 * tx completions in that queue as well
1793 */
1794 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1795 struct vmxnet3_tx_queue *tq =
1796 &adapter->tx_queue[rq - adapter->rx_queue];
1797 vmxnet3_tq_tx_complete(tq, adapter);
1798 }
1799
1800 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1801
1802 if (rxd_done < budget) {
1803 napi_complete(napi);
1804 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1805 }
1806 return rxd_done;
1807 }
1808
1809
1810 #ifdef CONFIG_PCI_MSI
1811
1812 /*
1813 * Handle completion interrupts on tx queues
1814 * Returns whether or not the intr is handled
1815 */
1816
1817 static irqreturn_t
1818 vmxnet3_msix_tx(int irq, void *data)
1819 {
1820 struct vmxnet3_tx_queue *tq = data;
1821 struct vmxnet3_adapter *adapter = tq->adapter;
1822
1823 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1824 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1825
1826 /* Handle the case where only one irq is allocate for all tx queues */
1827 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1828 int i;
1829 for (i = 0; i < adapter->num_tx_queues; i++) {
1830 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1831 vmxnet3_tq_tx_complete(txq, adapter);
1832 }
1833 } else {
1834 vmxnet3_tq_tx_complete(tq, adapter);
1835 }
1836 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1837
1838 return IRQ_HANDLED;
1839 }
1840
1841
1842 /*
1843 * Handle completion interrupts on rx queues. Returns whether or not the
1844 * intr is handled
1845 */
1846
1847 static irqreturn_t
1848 vmxnet3_msix_rx(int irq, void *data)
1849 {
1850 struct vmxnet3_rx_queue *rq = data;
1851 struct vmxnet3_adapter *adapter = rq->adapter;
1852
1853 /* disable intr if needed */
1854 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1855 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1856 napi_schedule(&rq->napi);
1857
1858 return IRQ_HANDLED;
1859 }
1860
1861 /*
1862 *----------------------------------------------------------------------------
1863 *
1864 * vmxnet3_msix_event --
1865 *
1866 * vmxnet3 msix event intr handler
1867 *
1868 * Result:
1869 * whether or not the intr is handled
1870 *
1871 *----------------------------------------------------------------------------
1872 */
1873
1874 static irqreturn_t
1875 vmxnet3_msix_event(int irq, void *data)
1876 {
1877 struct net_device *dev = data;
1878 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1879
1880 /* disable intr if needed */
1881 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1882 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1883
1884 if (adapter->shared->ecr)
1885 vmxnet3_process_events(adapter);
1886
1887 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1888
1889 return IRQ_HANDLED;
1890 }
1891
1892 #endif /* CONFIG_PCI_MSI */
1893
1894
1895 /* Interrupt handler for vmxnet3 */
1896 static irqreturn_t
1897 vmxnet3_intr(int irq, void *dev_id)
1898 {
1899 struct net_device *dev = dev_id;
1900 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1901
1902 if (adapter->intr.type == VMXNET3_IT_INTX) {
1903 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1904 if (unlikely(icr == 0))
1905 /* not ours */
1906 return IRQ_NONE;
1907 }
1908
1909
1910 /* disable intr if needed */
1911 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1912 vmxnet3_disable_all_intrs(adapter);
1913
1914 napi_schedule(&adapter->rx_queue[0].napi);
1915
1916 return IRQ_HANDLED;
1917 }
1918
1919 #ifdef CONFIG_NET_POLL_CONTROLLER
1920
1921 /* netpoll callback. */
1922 static void
1923 vmxnet3_netpoll(struct net_device *netdev)
1924 {
1925 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1926
1927 switch (adapter->intr.type) {
1928 #ifdef CONFIG_PCI_MSI
1929 case VMXNET3_IT_MSIX: {
1930 int i;
1931 for (i = 0; i < adapter->num_rx_queues; i++)
1932 vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
1933 break;
1934 }
1935 #endif
1936 case VMXNET3_IT_MSI:
1937 default:
1938 vmxnet3_intr(0, adapter->netdev);
1939 break;
1940 }
1941
1942 }
1943 #endif /* CONFIG_NET_POLL_CONTROLLER */
1944
1945 static int
1946 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1947 {
1948 struct vmxnet3_intr *intr = &adapter->intr;
1949 int err = 0, i;
1950 int vector = 0;
1951
1952 #ifdef CONFIG_PCI_MSI
1953 if (adapter->intr.type == VMXNET3_IT_MSIX) {
1954 for (i = 0; i < adapter->num_tx_queues; i++) {
1955 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1956 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1957 adapter->netdev->name, vector);
1958 err = request_irq(
1959 intr->msix_entries[vector].vector,
1960 vmxnet3_msix_tx, 0,
1961 adapter->tx_queue[i].name,
1962 &adapter->tx_queue[i]);
1963 } else {
1964 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1965 adapter->netdev->name, vector);
1966 }
1967 if (err) {
1968 dev_err(&adapter->netdev->dev,
1969 "Failed to request irq for MSIX, %s, "
1970 "error %d\n",
1971 adapter->tx_queue[i].name, err);
1972 return err;
1973 }
1974
1975 /* Handle the case where only 1 MSIx was allocated for
1976 * all tx queues */
1977 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1978 for (; i < adapter->num_tx_queues; i++)
1979 adapter->tx_queue[i].comp_ring.intr_idx
1980 = vector;
1981 vector++;
1982 break;
1983 } else {
1984 adapter->tx_queue[i].comp_ring.intr_idx
1985 = vector++;
1986 }
1987 }
1988 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1989 vector = 0;
1990
1991 for (i = 0; i < adapter->num_rx_queues; i++) {
1992 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1993 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1994 adapter->netdev->name, vector);
1995 else
1996 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1997 adapter->netdev->name, vector);
1998 err = request_irq(intr->msix_entries[vector].vector,
1999 vmxnet3_msix_rx, 0,
2000 adapter->rx_queue[i].name,
2001 &(adapter->rx_queue[i]));
2002 if (err) {
2003 netdev_err(adapter->netdev,
2004 "Failed to request irq for MSIX, "
2005 "%s, error %d\n",
2006 adapter->rx_queue[i].name, err);
2007 return err;
2008 }
2009
2010 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
2011 }
2012
2013 sprintf(intr->event_msi_vector_name, "%s-event-%d",
2014 adapter->netdev->name, vector);
2015 err = request_irq(intr->msix_entries[vector].vector,
2016 vmxnet3_msix_event, 0,
2017 intr->event_msi_vector_name, adapter->netdev);
2018 intr->event_intr_idx = vector;
2019
2020 } else if (intr->type == VMXNET3_IT_MSI) {
2021 adapter->num_rx_queues = 1;
2022 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
2023 adapter->netdev->name, adapter->netdev);
2024 } else {
2025 #endif
2026 adapter->num_rx_queues = 1;
2027 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
2028 IRQF_SHARED, adapter->netdev->name,
2029 adapter->netdev);
2030 #ifdef CONFIG_PCI_MSI
2031 }
2032 #endif
2033 intr->num_intrs = vector + 1;
2034 if (err) {
2035 netdev_err(adapter->netdev,
2036 "Failed to request irq (intr type:%d), error %d\n",
2037 intr->type, err);
2038 } else {
2039 /* Number of rx queues will not change after this */
2040 for (i = 0; i < adapter->num_rx_queues; i++) {
2041 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2042 rq->qid = i;
2043 rq->qid2 = i + adapter->num_rx_queues;
2044 }
2045
2046
2047
2048 /* init our intr settings */
2049 for (i = 0; i < intr->num_intrs; i++)
2050 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
2051 if (adapter->intr.type != VMXNET3_IT_MSIX) {
2052 adapter->intr.event_intr_idx = 0;
2053 for (i = 0; i < adapter->num_tx_queues; i++)
2054 adapter->tx_queue[i].comp_ring.intr_idx = 0;
2055 adapter->rx_queue[0].comp_ring.intr_idx = 0;
2056 }
2057
2058 netdev_info(adapter->netdev,
2059 "intr type %u, mode %u, %u vectors allocated\n",
2060 intr->type, intr->mask_mode, intr->num_intrs);
2061 }
2062
2063 return err;
2064 }
2065
2066
2067 static void
2068 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
2069 {
2070 struct vmxnet3_intr *intr = &adapter->intr;
2071 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
2072
2073 switch (intr->type) {
2074 #ifdef CONFIG_PCI_MSI
2075 case VMXNET3_IT_MSIX:
2076 {
2077 int i, vector = 0;
2078
2079 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2080 for (i = 0; i < adapter->num_tx_queues; i++) {
2081 free_irq(intr->msix_entries[vector++].vector,
2082 &(adapter->tx_queue[i]));
2083 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
2084 break;
2085 }
2086 }
2087
2088 for (i = 0; i < adapter->num_rx_queues; i++) {
2089 free_irq(intr->msix_entries[vector++].vector,
2090 &(adapter->rx_queue[i]));
2091 }
2092
2093 free_irq(intr->msix_entries[vector].vector,
2094 adapter->netdev);
2095 BUG_ON(vector >= intr->num_intrs);
2096 break;
2097 }
2098 #endif
2099 case VMXNET3_IT_MSI:
2100 free_irq(adapter->pdev->irq, adapter->netdev);
2101 break;
2102 case VMXNET3_IT_INTX:
2103 free_irq(adapter->pdev->irq, adapter->netdev);
2104 break;
2105 default:
2106 BUG();
2107 }
2108 }
2109
2110
2111 static void
2112 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
2113 {
2114 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2115 u16 vid;
2116
2117 /* allow untagged pkts */
2118 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
2119
2120 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2121 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2122 }
2123
2124
2125 static int
2126 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2127 {
2128 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2129
2130 if (!(netdev->flags & IFF_PROMISC)) {
2131 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2132 unsigned long flags;
2133
2134 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2135 spin_lock_irqsave(&adapter->cmd_lock, flags);
2136 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2137 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2138 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2139 }
2140
2141 set_bit(vid, adapter->active_vlans);
2142
2143 return 0;
2144 }
2145
2146
2147 static int
2148 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2149 {
2150 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2151
2152 if (!(netdev->flags & IFF_PROMISC)) {
2153 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2154 unsigned long flags;
2155
2156 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2157 spin_lock_irqsave(&adapter->cmd_lock, flags);
2158 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2159 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2160 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2161 }
2162
2163 clear_bit(vid, adapter->active_vlans);
2164
2165 return 0;
2166 }
2167
2168
2169 static u8 *
2170 vmxnet3_copy_mc(struct net_device *netdev)
2171 {
2172 u8 *buf = NULL;
2173 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2174
2175 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2176 if (sz <= 0xffff) {
2177 /* We may be called with BH disabled */
2178 buf = kmalloc(sz, GFP_ATOMIC);
2179 if (buf) {
2180 struct netdev_hw_addr *ha;
2181 int i = 0;
2182
2183 netdev_for_each_mc_addr(ha, netdev)
2184 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2185 ETH_ALEN);
2186 }
2187 }
2188 return buf;
2189 }
2190
2191
2192 static void
2193 vmxnet3_set_mc(struct net_device *netdev)
2194 {
2195 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2196 unsigned long flags;
2197 struct Vmxnet3_RxFilterConf *rxConf =
2198 &adapter->shared->devRead.rxFilterConf;
2199 u8 *new_table = NULL;
2200 dma_addr_t new_table_pa = 0;
2201 u32 new_mode = VMXNET3_RXM_UCAST;
2202
2203 if (netdev->flags & IFF_PROMISC) {
2204 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2205 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2206
2207 new_mode |= VMXNET3_RXM_PROMISC;
2208 } else {
2209 vmxnet3_restore_vlan(adapter);
2210 }
2211
2212 if (netdev->flags & IFF_BROADCAST)
2213 new_mode |= VMXNET3_RXM_BCAST;
2214
2215 if (netdev->flags & IFF_ALLMULTI)
2216 new_mode |= VMXNET3_RXM_ALL_MULTI;
2217 else
2218 if (!netdev_mc_empty(netdev)) {
2219 new_table = vmxnet3_copy_mc(netdev);
2220 if (new_table) {
2221 size_t sz = netdev_mc_count(netdev) * ETH_ALEN;
2222
2223 rxConf->mfTableLen = cpu_to_le16(sz);
2224 new_table_pa = dma_map_single(
2225 &adapter->pdev->dev,
2226 new_table,
2227 sz,
2228 PCI_DMA_TODEVICE);
2229 }
2230
2231 if (!dma_mapping_error(&adapter->pdev->dev,
2232 new_table_pa)) {
2233 new_mode |= VMXNET3_RXM_MCAST;
2234 rxConf->mfTablePA = cpu_to_le64(new_table_pa);
2235 } else {
2236 netdev_info(netdev,
2237 "failed to copy mcast list, setting ALL_MULTI\n");
2238 new_mode |= VMXNET3_RXM_ALL_MULTI;
2239 }
2240 }
2241
2242 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2243 rxConf->mfTableLen = 0;
2244 rxConf->mfTablePA = 0;
2245 }
2246
2247 spin_lock_irqsave(&adapter->cmd_lock, flags);
2248 if (new_mode != rxConf->rxMode) {
2249 rxConf->rxMode = cpu_to_le32(new_mode);
2250 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2251 VMXNET3_CMD_UPDATE_RX_MODE);
2252 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2253 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2254 }
2255
2256 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2257 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2258 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2259
2260 if (new_table_pa)
2261 dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2262 rxConf->mfTableLen, PCI_DMA_TODEVICE);
2263 kfree(new_table);
2264 }
2265
2266 void
2267 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2268 {
2269 int i;
2270
2271 for (i = 0; i < adapter->num_rx_queues; i++)
2272 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2273 }
2274
2275
2276 /*
2277 * Set up driver_shared based on settings in adapter.
2278 */
2279
2280 static void
2281 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2282 {
2283 struct Vmxnet3_DriverShared *shared = adapter->shared;
2284 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2285 struct Vmxnet3_TxQueueConf *tqc;
2286 struct Vmxnet3_RxQueueConf *rqc;
2287 int i;
2288
2289 memset(shared, 0, sizeof(*shared));
2290
2291 /* driver settings */
2292 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2293 devRead->misc.driverInfo.version = cpu_to_le32(
2294 VMXNET3_DRIVER_VERSION_NUM);
2295 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2296 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2297 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2298 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2299 *((u32 *)&devRead->misc.driverInfo.gos));
2300 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2301 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2302
2303 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2304 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2305
2306 /* set up feature flags */
2307 if (adapter->netdev->features & NETIF_F_RXCSUM)
2308 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2309
2310 if (adapter->netdev->features & NETIF_F_LRO) {
2311 devRead->misc.uptFeatures |= UPT1_F_LRO;
2312 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2313 }
2314 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2315 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2316
2317 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2318 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2319 devRead->misc.queueDescLen = cpu_to_le32(
2320 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2321 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2322
2323 /* tx queue settings */
2324 devRead->misc.numTxQueues = adapter->num_tx_queues;
2325 for (i = 0; i < adapter->num_tx_queues; i++) {
2326 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2327 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2328 tqc = &adapter->tqd_start[i].conf;
2329 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2330 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2331 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2332 tqc->ddPA = cpu_to_le64(tq->buf_info_pa);
2333 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2334 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2335 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2336 tqc->ddLen = cpu_to_le32(
2337 sizeof(struct vmxnet3_tx_buf_info) *
2338 tqc->txRingSize);
2339 tqc->intrIdx = tq->comp_ring.intr_idx;
2340 }
2341
2342 /* rx queue settings */
2343 devRead->misc.numRxQueues = adapter->num_rx_queues;
2344 for (i = 0; i < adapter->num_rx_queues; i++) {
2345 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2346 rqc = &adapter->rqd_start[i].conf;
2347 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2348 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2349 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2350 rqc->ddPA = cpu_to_le64(rq->buf_info_pa);
2351 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2352 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2353 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2354 rqc->ddLen = cpu_to_le32(
2355 sizeof(struct vmxnet3_rx_buf_info) *
2356 (rqc->rxRingSize[0] +
2357 rqc->rxRingSize[1]));
2358 rqc->intrIdx = rq->comp_ring.intr_idx;
2359 }
2360
2361 #ifdef VMXNET3_RSS
2362 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2363
2364 if (adapter->rss) {
2365 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2366
2367 devRead->misc.uptFeatures |= UPT1_F_RSS;
2368 devRead->misc.numRxQueues = adapter->num_rx_queues;
2369 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2370 UPT1_RSS_HASH_TYPE_IPV4 |
2371 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2372 UPT1_RSS_HASH_TYPE_IPV6;
2373 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2374 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2375 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2376 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2377
2378 for (i = 0; i < rssConf->indTableSize; i++)
2379 rssConf->indTable[i] = ethtool_rxfh_indir_default(
2380 i, adapter->num_rx_queues);
2381
2382 devRead->rssConfDesc.confVer = 1;
2383 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2384 devRead->rssConfDesc.confPA =
2385 cpu_to_le64(adapter->rss_conf_pa);
2386 }
2387
2388 #endif /* VMXNET3_RSS */
2389
2390 /* intr settings */
2391 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2392 VMXNET3_IMM_AUTO;
2393 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2394 for (i = 0; i < adapter->intr.num_intrs; i++)
2395 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2396
2397 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2398 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2399
2400 /* rx filter settings */
2401 devRead->rxFilterConf.rxMode = 0;
2402 vmxnet3_restore_vlan(adapter);
2403 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2404
2405 /* the rest are already zeroed */
2406 }
2407
2408
2409 int
2410 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2411 {
2412 int err, i;
2413 u32 ret;
2414 unsigned long flags;
2415
2416 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2417 " ring sizes %u %u %u\n", adapter->netdev->name,
2418 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2419 adapter->tx_queue[0].tx_ring.size,
2420 adapter->rx_queue[0].rx_ring[0].size,
2421 adapter->rx_queue[0].rx_ring[1].size);
2422
2423 vmxnet3_tq_init_all(adapter);
2424 err = vmxnet3_rq_init_all(adapter);
2425 if (err) {
2426 netdev_err(adapter->netdev,
2427 "Failed to init rx queue error %d\n", err);
2428 goto rq_err;
2429 }
2430
2431 err = vmxnet3_request_irqs(adapter);
2432 if (err) {
2433 netdev_err(adapter->netdev,
2434 "Failed to setup irq for error %d\n", err);
2435 goto irq_err;
2436 }
2437
2438 vmxnet3_setup_driver_shared(adapter);
2439
2440 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2441 adapter->shared_pa));
2442 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2443 adapter->shared_pa));
2444 spin_lock_irqsave(&adapter->cmd_lock, flags);
2445 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2446 VMXNET3_CMD_ACTIVATE_DEV);
2447 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2448 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2449
2450 if (ret != 0) {
2451 netdev_err(adapter->netdev,
2452 "Failed to activate dev: error %u\n", ret);
2453 err = -EINVAL;
2454 goto activate_err;
2455 }
2456
2457 for (i = 0; i < adapter->num_rx_queues; i++) {
2458 VMXNET3_WRITE_BAR0_REG(adapter,
2459 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2460 adapter->rx_queue[i].rx_ring[0].next2fill);
2461 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2462 (i * VMXNET3_REG_ALIGN)),
2463 adapter->rx_queue[i].rx_ring[1].next2fill);
2464 }
2465
2466 /* Apply the rx filter settins last. */
2467 vmxnet3_set_mc(adapter->netdev);
2468
2469 /*
2470 * Check link state when first activating device. It will start the
2471 * tx queue if the link is up.
2472 */
2473 vmxnet3_check_link(adapter, true);
2474 for (i = 0; i < adapter->num_rx_queues; i++)
2475 napi_enable(&adapter->rx_queue[i].napi);
2476 vmxnet3_enable_all_intrs(adapter);
2477 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2478 return 0;
2479
2480 activate_err:
2481 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2482 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2483 vmxnet3_free_irqs(adapter);
2484 irq_err:
2485 rq_err:
2486 /* free up buffers we allocated */
2487 vmxnet3_rq_cleanup_all(adapter);
2488 return err;
2489 }
2490
2491
2492 void
2493 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2494 {
2495 unsigned long flags;
2496 spin_lock_irqsave(&adapter->cmd_lock, flags);
2497 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2498 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2499 }
2500
2501
2502 int
2503 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2504 {
2505 int i;
2506 unsigned long flags;
2507 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2508 return 0;
2509
2510
2511 spin_lock_irqsave(&adapter->cmd_lock, flags);
2512 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2513 VMXNET3_CMD_QUIESCE_DEV);
2514 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2515 vmxnet3_disable_all_intrs(adapter);
2516
2517 for (i = 0; i < adapter->num_rx_queues; i++)
2518 napi_disable(&adapter->rx_queue[i].napi);
2519 netif_tx_disable(adapter->netdev);
2520 adapter->link_speed = 0;
2521 netif_carrier_off(adapter->netdev);
2522
2523 vmxnet3_tq_cleanup_all(adapter);
2524 vmxnet3_rq_cleanup_all(adapter);
2525 vmxnet3_free_irqs(adapter);
2526 return 0;
2527 }
2528
2529
2530 static void
2531 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2532 {
2533 u32 tmp;
2534
2535 tmp = *(u32 *)mac;
2536 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2537
2538 tmp = (mac[5] << 8) | mac[4];
2539 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2540 }
2541
2542
2543 static int
2544 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2545 {
2546 struct sockaddr *addr = p;
2547 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2548
2549 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2550 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2551
2552 return 0;
2553 }
2554
2555
2556 /* ==================== initialization and cleanup routines ============ */
2557
2558 static int
2559 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2560 {
2561 int err;
2562 unsigned long mmio_start, mmio_len;
2563 struct pci_dev *pdev = adapter->pdev;
2564
2565 err = pci_enable_device(pdev);
2566 if (err) {
2567 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
2568 return err;
2569 }
2570
2571 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2572 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2573 dev_err(&pdev->dev,
2574 "pci_set_consistent_dma_mask failed\n");
2575 err = -EIO;
2576 goto err_set_mask;
2577 }
2578 *dma64 = true;
2579 } else {
2580 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2581 dev_err(&pdev->dev,
2582 "pci_set_dma_mask failed\n");
2583 err = -EIO;
2584 goto err_set_mask;
2585 }
2586 *dma64 = false;
2587 }
2588
2589 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2590 vmxnet3_driver_name);
2591 if (err) {
2592 dev_err(&pdev->dev,
2593 "Failed to request region for adapter: error %d\n", err);
2594 goto err_set_mask;
2595 }
2596
2597 pci_set_master(pdev);
2598
2599 mmio_start = pci_resource_start(pdev, 0);
2600 mmio_len = pci_resource_len(pdev, 0);
2601 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2602 if (!adapter->hw_addr0) {
2603 dev_err(&pdev->dev, "Failed to map bar0\n");
2604 err = -EIO;
2605 goto err_ioremap;
2606 }
2607
2608 mmio_start = pci_resource_start(pdev, 1);
2609 mmio_len = pci_resource_len(pdev, 1);
2610 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2611 if (!adapter->hw_addr1) {
2612 dev_err(&pdev->dev, "Failed to map bar1\n");
2613 err = -EIO;
2614 goto err_bar1;
2615 }
2616 return 0;
2617
2618 err_bar1:
2619 iounmap(adapter->hw_addr0);
2620 err_ioremap:
2621 pci_release_selected_regions(pdev, (1 << 2) - 1);
2622 err_set_mask:
2623 pci_disable_device(pdev);
2624 return err;
2625 }
2626
2627
2628 static void
2629 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2630 {
2631 BUG_ON(!adapter->pdev);
2632
2633 iounmap(adapter->hw_addr0);
2634 iounmap(adapter->hw_addr1);
2635 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2636 pci_disable_device(adapter->pdev);
2637 }
2638
2639
2640 static void
2641 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2642 {
2643 size_t sz, i, ring0_size, ring1_size, comp_size;
2644 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2645
2646
2647 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2648 VMXNET3_MAX_ETH_HDR_SIZE) {
2649 adapter->skb_buf_size = adapter->netdev->mtu +
2650 VMXNET3_MAX_ETH_HDR_SIZE;
2651 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2652 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2653
2654 adapter->rx_buf_per_pkt = 1;
2655 } else {
2656 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2657 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2658 VMXNET3_MAX_ETH_HDR_SIZE;
2659 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2660 }
2661
2662 /*
2663 * for simplicity, force the ring0 size to be a multiple of
2664 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2665 */
2666 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2667 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2668 ring0_size = (ring0_size + sz - 1) / sz * sz;
2669 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2670 sz * sz);
2671 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2672 ring1_size = (ring1_size + sz - 1) / sz * sz;
2673 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
2674 sz * sz);
2675 comp_size = ring0_size + ring1_size;
2676
2677 for (i = 0; i < adapter->num_rx_queues; i++) {
2678 rq = &adapter->rx_queue[i];
2679 rq->rx_ring[0].size = ring0_size;
2680 rq->rx_ring[1].size = ring1_size;
2681 rq->comp_ring.size = comp_size;
2682 }
2683 }
2684
2685
2686 int
2687 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2688 u32 rx_ring_size, u32 rx_ring2_size)
2689 {
2690 int err = 0, i;
2691
2692 for (i = 0; i < adapter->num_tx_queues; i++) {
2693 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2694 tq->tx_ring.size = tx_ring_size;
2695 tq->data_ring.size = tx_ring_size;
2696 tq->comp_ring.size = tx_ring_size;
2697 tq->shared = &adapter->tqd_start[i].ctrl;
2698 tq->stopped = true;
2699 tq->adapter = adapter;
2700 tq->qid = i;
2701 err = vmxnet3_tq_create(tq, adapter);
2702 /*
2703 * Too late to change num_tx_queues. We cannot do away with
2704 * lesser number of queues than what we asked for
2705 */
2706 if (err)
2707 goto queue_err;
2708 }
2709
2710 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2711 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2712 vmxnet3_adjust_rx_ring_size(adapter);
2713 for (i = 0; i < adapter->num_rx_queues; i++) {
2714 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2715 /* qid and qid2 for rx queues will be assigned later when num
2716 * of rx queues is finalized after allocating intrs */
2717 rq->shared = &adapter->rqd_start[i].ctrl;
2718 rq->adapter = adapter;
2719 err = vmxnet3_rq_create(rq, adapter);
2720 if (err) {
2721 if (i == 0) {
2722 netdev_err(adapter->netdev,
2723 "Could not allocate any rx queues. "
2724 "Aborting.\n");
2725 goto queue_err;
2726 } else {
2727 netdev_info(adapter->netdev,
2728 "Number of rx queues changed "
2729 "to : %d.\n", i);
2730 adapter->num_rx_queues = i;
2731 err = 0;
2732 break;
2733 }
2734 }
2735 }
2736 return err;
2737 queue_err:
2738 vmxnet3_tq_destroy_all(adapter);
2739 return err;
2740 }
2741
2742 static int
2743 vmxnet3_open(struct net_device *netdev)
2744 {
2745 struct vmxnet3_adapter *adapter;
2746 int err, i;
2747
2748 adapter = netdev_priv(netdev);
2749
2750 for (i = 0; i < adapter->num_tx_queues; i++)
2751 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2752
2753 err = vmxnet3_create_queues(adapter, adapter->tx_ring_size,
2754 adapter->rx_ring_size,
2755 adapter->rx_ring2_size);
2756 if (err)
2757 goto queue_err;
2758
2759 err = vmxnet3_activate_dev(adapter);
2760 if (err)
2761 goto activate_err;
2762
2763 return 0;
2764
2765 activate_err:
2766 vmxnet3_rq_destroy_all(adapter);
2767 vmxnet3_tq_destroy_all(adapter);
2768 queue_err:
2769 return err;
2770 }
2771
2772
2773 static int
2774 vmxnet3_close(struct net_device *netdev)
2775 {
2776 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2777
2778 /*
2779 * Reset_work may be in the middle of resetting the device, wait for its
2780 * completion.
2781 */
2782 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2783 msleep(1);
2784
2785 vmxnet3_quiesce_dev(adapter);
2786
2787 vmxnet3_rq_destroy_all(adapter);
2788 vmxnet3_tq_destroy_all(adapter);
2789
2790 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2791
2792
2793 return 0;
2794 }
2795
2796
2797 void
2798 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2799 {
2800 int i;
2801
2802 /*
2803 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2804 * vmxnet3_close() will deadlock.
2805 */
2806 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2807
2808 /* we need to enable NAPI, otherwise dev_close will deadlock */
2809 for (i = 0; i < adapter->num_rx_queues; i++)
2810 napi_enable(&adapter->rx_queue[i].napi);
2811 dev_close(adapter->netdev);
2812 }
2813
2814
2815 static int
2816 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2817 {
2818 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2819 int err = 0;
2820
2821 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2822 return -EINVAL;
2823
2824 netdev->mtu = new_mtu;
2825
2826 /*
2827 * Reset_work may be in the middle of resetting the device, wait for its
2828 * completion.
2829 */
2830 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2831 msleep(1);
2832
2833 if (netif_running(netdev)) {
2834 vmxnet3_quiesce_dev(adapter);
2835 vmxnet3_reset_dev(adapter);
2836
2837 /* we need to re-create the rx queue based on the new mtu */
2838 vmxnet3_rq_destroy_all(adapter);
2839 vmxnet3_adjust_rx_ring_size(adapter);
2840 err = vmxnet3_rq_create_all(adapter);
2841 if (err) {
2842 netdev_err(netdev,
2843 "failed to re-create rx queues, "
2844 " error %d. Closing it.\n", err);
2845 goto out;
2846 }
2847
2848 err = vmxnet3_activate_dev(adapter);
2849 if (err) {
2850 netdev_err(netdev,
2851 "failed to re-activate, error %d. "
2852 "Closing it\n", err);
2853 goto out;
2854 }
2855 }
2856
2857 out:
2858 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2859 if (err)
2860 vmxnet3_force_close(adapter);
2861
2862 return err;
2863 }
2864
2865
2866 static void
2867 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2868 {
2869 struct net_device *netdev = adapter->netdev;
2870
2871 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
2872 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
2873 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
2874 NETIF_F_LRO;
2875 if (dma64)
2876 netdev->hw_features |= NETIF_F_HIGHDMA;
2877 netdev->vlan_features = netdev->hw_features &
2878 ~(NETIF_F_HW_VLAN_CTAG_TX |
2879 NETIF_F_HW_VLAN_CTAG_RX);
2880 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
2881 }
2882
2883
2884 static void
2885 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2886 {
2887 u32 tmp;
2888
2889 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2890 *(u32 *)mac = tmp;
2891
2892 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2893 mac[4] = tmp & 0xff;
2894 mac[5] = (tmp >> 8) & 0xff;
2895 }
2896
2897 #ifdef CONFIG_PCI_MSI
2898
2899 /*
2900 * Enable MSIx vectors.
2901 * Returns :
2902 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
2903 * were enabled.
2904 * number of vectors which were enabled otherwise (this number is greater
2905 * than VMXNET3_LINUX_MIN_MSIX_VECT)
2906 */
2907
2908 static int
2909 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
2910 {
2911 int ret = pci_enable_msix_range(adapter->pdev,
2912 adapter->intr.msix_entries, nvec, nvec);
2913
2914 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
2915 dev_err(&adapter->netdev->dev,
2916 "Failed to enable %d MSI-X, trying %d\n",
2917 nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
2918
2919 ret = pci_enable_msix_range(adapter->pdev,
2920 adapter->intr.msix_entries,
2921 VMXNET3_LINUX_MIN_MSIX_VECT,
2922 VMXNET3_LINUX_MIN_MSIX_VECT);
2923 }
2924
2925 if (ret < 0) {
2926 dev_err(&adapter->netdev->dev,
2927 "Failed to enable MSI-X, error: %d\n", ret);
2928 }
2929
2930 return ret;
2931 }
2932
2933
2934 #endif /* CONFIG_PCI_MSI */
2935
2936 static void
2937 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2938 {
2939 u32 cfg;
2940 unsigned long flags;
2941
2942 /* intr settings */
2943 spin_lock_irqsave(&adapter->cmd_lock, flags);
2944 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2945 VMXNET3_CMD_GET_CONF_INTR);
2946 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2947 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2948 adapter->intr.type = cfg & 0x3;
2949 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2950
2951 if (adapter->intr.type == VMXNET3_IT_AUTO) {
2952 adapter->intr.type = VMXNET3_IT_MSIX;
2953 }
2954
2955 #ifdef CONFIG_PCI_MSI
2956 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2957 int i, nvec;
2958
2959 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
2960 1 : adapter->num_tx_queues;
2961 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
2962 0 : adapter->num_rx_queues;
2963 nvec += 1; /* for link event */
2964 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
2965 nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
2966
2967 for (i = 0; i < nvec; i++)
2968 adapter->intr.msix_entries[i].entry = i;
2969
2970 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec);
2971 if (nvec < 0)
2972 goto msix_err;
2973
2974 /* If we cannot allocate one MSIx vector per queue
2975 * then limit the number of rx queues to 1
2976 */
2977 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) {
2978 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2979 || adapter->num_rx_queues != 1) {
2980 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2981 netdev_err(adapter->netdev,
2982 "Number of rx queues : 1\n");
2983 adapter->num_rx_queues = 1;
2984 }
2985 }
2986
2987 adapter->intr.num_intrs = nvec;
2988 return;
2989
2990 msix_err:
2991 /* If we cannot allocate MSIx vectors use only one rx queue */
2992 dev_info(&adapter->pdev->dev,
2993 "Failed to enable MSI-X, error %d. "
2994 "Limiting #rx queues to 1, try MSI.\n", nvec);
2995
2996 adapter->intr.type = VMXNET3_IT_MSI;
2997 }
2998
2999 if (adapter->intr.type == VMXNET3_IT_MSI) {
3000 if (!pci_enable_msi(adapter->pdev)) {
3001 adapter->num_rx_queues = 1;
3002 adapter->intr.num_intrs = 1;
3003 return;
3004 }
3005 }
3006 #endif /* CONFIG_PCI_MSI */
3007
3008 adapter->num_rx_queues = 1;
3009 dev_info(&adapter->netdev->dev,
3010 "Using INTx interrupt, #Rx queues: 1.\n");
3011 adapter->intr.type = VMXNET3_IT_INTX;
3012
3013 /* INT-X related setting */
3014 adapter->intr.num_intrs = 1;
3015 }
3016
3017
3018 static void
3019 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
3020 {
3021 if (adapter->intr.type == VMXNET3_IT_MSIX)
3022 pci_disable_msix(adapter->pdev);
3023 else if (adapter->intr.type == VMXNET3_IT_MSI)
3024 pci_disable_msi(adapter->pdev);
3025 else
3026 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
3027 }
3028
3029
3030 static void
3031 vmxnet3_tx_timeout(struct net_device *netdev)
3032 {
3033 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3034 adapter->tx_timeout_count++;
3035
3036 netdev_err(adapter->netdev, "tx hang\n");
3037 schedule_work(&adapter->work);
3038 netif_wake_queue(adapter->netdev);
3039 }
3040
3041
3042 static void
3043 vmxnet3_reset_work(struct work_struct *data)
3044 {
3045 struct vmxnet3_adapter *adapter;
3046
3047 adapter = container_of(data, struct vmxnet3_adapter, work);
3048
3049 /* if another thread is resetting the device, no need to proceed */
3050 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3051 return;
3052
3053 /* if the device is closed, we must leave it alone */
3054 rtnl_lock();
3055 if (netif_running(adapter->netdev)) {
3056 netdev_notice(adapter->netdev, "resetting\n");
3057 vmxnet3_quiesce_dev(adapter);
3058 vmxnet3_reset_dev(adapter);
3059 vmxnet3_activate_dev(adapter);
3060 } else {
3061 netdev_info(adapter->netdev, "already closed\n");
3062 }
3063 rtnl_unlock();
3064
3065 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3066 }
3067
3068
3069 static int
3070 vmxnet3_probe_device(struct pci_dev *pdev,
3071 const struct pci_device_id *id)
3072 {
3073 static const struct net_device_ops vmxnet3_netdev_ops = {
3074 .ndo_open = vmxnet3_open,
3075 .ndo_stop = vmxnet3_close,
3076 .ndo_start_xmit = vmxnet3_xmit_frame,
3077 .ndo_set_mac_address = vmxnet3_set_mac_addr,
3078 .ndo_change_mtu = vmxnet3_change_mtu,
3079 .ndo_set_features = vmxnet3_set_features,
3080 .ndo_get_stats64 = vmxnet3_get_stats64,
3081 .ndo_tx_timeout = vmxnet3_tx_timeout,
3082 .ndo_set_rx_mode = vmxnet3_set_mc,
3083 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
3084 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
3085 #ifdef CONFIG_NET_POLL_CONTROLLER
3086 .ndo_poll_controller = vmxnet3_netpoll,
3087 #endif
3088 };
3089 int err;
3090 bool dma64 = false; /* stupid gcc */
3091 u32 ver;
3092 struct net_device *netdev;
3093 struct vmxnet3_adapter *adapter;
3094 u8 mac[ETH_ALEN];
3095 int size;
3096 int num_tx_queues;
3097 int num_rx_queues;
3098
3099 if (!pci_msi_enabled())
3100 enable_mq = 0;
3101
3102 #ifdef VMXNET3_RSS
3103 if (enable_mq)
3104 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3105 (int)num_online_cpus());
3106 else
3107 #endif
3108 num_rx_queues = 1;
3109 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3110
3111 if (enable_mq)
3112 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
3113 (int)num_online_cpus());
3114 else
3115 num_tx_queues = 1;
3116
3117 num_tx_queues = rounddown_pow_of_two(num_tx_queues);
3118 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
3119 max(num_tx_queues, num_rx_queues));
3120 dev_info(&pdev->dev,
3121 "# of Tx queues : %d, # of Rx queues : %d\n",
3122 num_tx_queues, num_rx_queues);
3123
3124 if (!netdev)
3125 return -ENOMEM;
3126
3127 pci_set_drvdata(pdev, netdev);
3128 adapter = netdev_priv(netdev);
3129 adapter->netdev = netdev;
3130 adapter->pdev = pdev;
3131
3132 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
3133 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
3134 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
3135
3136 spin_lock_init(&adapter->cmd_lock);
3137 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
3138 sizeof(struct vmxnet3_adapter),
3139 PCI_DMA_TODEVICE);
3140 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) {
3141 dev_err(&pdev->dev, "Failed to map dma\n");
3142 err = -EFAULT;
3143 goto err_dma_map;
3144 }
3145 adapter->shared = dma_alloc_coherent(
3146 &adapter->pdev->dev,
3147 sizeof(struct Vmxnet3_DriverShared),
3148 &adapter->shared_pa, GFP_KERNEL);
3149 if (!adapter->shared) {
3150 dev_err(&pdev->dev, "Failed to allocate memory\n");
3151 err = -ENOMEM;
3152 goto err_alloc_shared;
3153 }
3154
3155 adapter->num_rx_queues = num_rx_queues;
3156 adapter->num_tx_queues = num_tx_queues;
3157 adapter->rx_buf_per_pkt = 1;
3158
3159 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3160 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3161 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3162 &adapter->queue_desc_pa,
3163 GFP_KERNEL);
3164
3165 if (!adapter->tqd_start) {
3166 dev_err(&pdev->dev, "Failed to allocate memory\n");
3167 err = -ENOMEM;
3168 goto err_alloc_queue_desc;
3169 }
3170 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3171 adapter->num_tx_queues);
3172
3173 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3174 sizeof(struct Vmxnet3_PMConf),
3175 &adapter->pm_conf_pa,
3176 GFP_KERNEL);
3177 if (adapter->pm_conf == NULL) {
3178 err = -ENOMEM;
3179 goto err_alloc_pm;
3180 }
3181
3182 #ifdef VMXNET3_RSS
3183
3184 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
3185 sizeof(struct UPT1_RSSConf),
3186 &adapter->rss_conf_pa,
3187 GFP_KERNEL);
3188 if (adapter->rss_conf == NULL) {
3189 err = -ENOMEM;
3190 goto err_alloc_rss;
3191 }
3192 #endif /* VMXNET3_RSS */
3193
3194 err = vmxnet3_alloc_pci_resources(adapter, &dma64);
3195 if (err < 0)
3196 goto err_alloc_pci;
3197
3198 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3199 if (ver & 2) {
3200 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 2);
3201 adapter->version = 2;
3202 } else if (ver & 1) {
3203 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
3204 adapter->version = 1;
3205 } else {
3206 dev_err(&pdev->dev,
3207 "Incompatible h/w version (0x%x) for adapter\n", ver);
3208 err = -EBUSY;
3209 goto err_ver;
3210 }
3211 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version);
3212
3213 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3214 if (ver & 1) {
3215 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3216 } else {
3217 dev_err(&pdev->dev,
3218 "Incompatible upt version (0x%x) for adapter\n", ver);
3219 err = -EBUSY;
3220 goto err_ver;
3221 }
3222
3223 SET_NETDEV_DEV(netdev, &pdev->dev);
3224 vmxnet3_declare_features(adapter, dma64);
3225
3226 if (adapter->num_tx_queues == adapter->num_rx_queues)
3227 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
3228 else
3229 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3230
3231 vmxnet3_alloc_intr_resources(adapter);
3232
3233 #ifdef VMXNET3_RSS
3234 if (adapter->num_rx_queues > 1 &&
3235 adapter->intr.type == VMXNET3_IT_MSIX) {
3236 adapter->rss = true;
3237 netdev->hw_features |= NETIF_F_RXHASH;
3238 netdev->features |= NETIF_F_RXHASH;
3239 dev_dbg(&pdev->dev, "RSS is enabled.\n");
3240 } else {
3241 adapter->rss = false;
3242 }
3243 #endif
3244
3245 vmxnet3_read_mac_addr(adapter, mac);
3246 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3247
3248 netdev->netdev_ops = &vmxnet3_netdev_ops;
3249 vmxnet3_set_ethtool_ops(netdev);
3250 netdev->watchdog_timeo = 5 * HZ;
3251
3252 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3253 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3254
3255 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3256 int i;
3257 for (i = 0; i < adapter->num_rx_queues; i++) {
3258 netif_napi_add(adapter->netdev,
3259 &adapter->rx_queue[i].napi,
3260 vmxnet3_poll_rx_only, 64);
3261 }
3262 } else {
3263 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3264 vmxnet3_poll, 64);
3265 }
3266
3267 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3268 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3269
3270 netif_carrier_off(netdev);
3271 err = register_netdev(netdev);
3272
3273 if (err) {
3274 dev_err(&pdev->dev, "Failed to register adapter\n");
3275 goto err_register;
3276 }
3277
3278 vmxnet3_check_link(adapter, false);
3279 return 0;
3280
3281 err_register:
3282 vmxnet3_free_intr_resources(adapter);
3283 err_ver:
3284 vmxnet3_free_pci_resources(adapter);
3285 err_alloc_pci:
3286 #ifdef VMXNET3_RSS
3287 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3288 adapter->rss_conf, adapter->rss_conf_pa);
3289 err_alloc_rss:
3290 #endif
3291 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3292 adapter->pm_conf, adapter->pm_conf_pa);
3293 err_alloc_pm:
3294 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3295 adapter->queue_desc_pa);
3296 err_alloc_queue_desc:
3297 dma_free_coherent(&adapter->pdev->dev,
3298 sizeof(struct Vmxnet3_DriverShared),
3299 adapter->shared, adapter->shared_pa);
3300 err_alloc_shared:
3301 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3302 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3303 err_dma_map:
3304 free_netdev(netdev);
3305 return err;
3306 }
3307
3308
3309 static void
3310 vmxnet3_remove_device(struct pci_dev *pdev)
3311 {
3312 struct net_device *netdev = pci_get_drvdata(pdev);
3313 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3314 int size = 0;
3315 int num_rx_queues;
3316
3317 #ifdef VMXNET3_RSS
3318 if (enable_mq)
3319 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3320 (int)num_online_cpus());
3321 else
3322 #endif
3323 num_rx_queues = 1;
3324 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3325
3326 cancel_work_sync(&adapter->work);
3327
3328 unregister_netdev(netdev);
3329
3330 vmxnet3_free_intr_resources(adapter);
3331 vmxnet3_free_pci_resources(adapter);
3332 #ifdef VMXNET3_RSS
3333 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3334 adapter->rss_conf, adapter->rss_conf_pa);
3335 #endif
3336 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3337 adapter->pm_conf, adapter->pm_conf_pa);
3338
3339 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3340 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3341 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3342 adapter->queue_desc_pa);
3343 dma_free_coherent(&adapter->pdev->dev,
3344 sizeof(struct Vmxnet3_DriverShared),
3345 adapter->shared, adapter->shared_pa);
3346 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3347 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3348 free_netdev(netdev);
3349 }
3350
3351 static void vmxnet3_shutdown_device(struct pci_dev *pdev)
3352 {
3353 struct net_device *netdev = pci_get_drvdata(pdev);
3354 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3355 unsigned long flags;
3356
3357 /* Reset_work may be in the middle of resetting the device, wait for its
3358 * completion.
3359 */
3360 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3361 msleep(1);
3362
3363 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED,
3364 &adapter->state)) {
3365 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3366 return;
3367 }
3368 spin_lock_irqsave(&adapter->cmd_lock, flags);
3369 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3370 VMXNET3_CMD_QUIESCE_DEV);
3371 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3372 vmxnet3_disable_all_intrs(adapter);
3373
3374 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3375 }
3376
3377
3378 #ifdef CONFIG_PM
3379
3380 static int
3381 vmxnet3_suspend(struct device *device)
3382 {
3383 struct pci_dev *pdev = to_pci_dev(device);
3384 struct net_device *netdev = pci_get_drvdata(pdev);
3385 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3386 struct Vmxnet3_PMConf *pmConf;
3387 struct ethhdr *ehdr;
3388 struct arphdr *ahdr;
3389 u8 *arpreq;
3390 struct in_device *in_dev;
3391 struct in_ifaddr *ifa;
3392 unsigned long flags;
3393 int i = 0;
3394
3395 if (!netif_running(netdev))
3396 return 0;
3397
3398 for (i = 0; i < adapter->num_rx_queues; i++)
3399 napi_disable(&adapter->rx_queue[i].napi);
3400
3401 vmxnet3_disable_all_intrs(adapter);
3402 vmxnet3_free_irqs(adapter);
3403 vmxnet3_free_intr_resources(adapter);
3404
3405 netif_device_detach(netdev);
3406 netif_tx_stop_all_queues(netdev);
3407
3408 /* Create wake-up filters. */
3409 pmConf = adapter->pm_conf;
3410 memset(pmConf, 0, sizeof(*pmConf));
3411
3412 if (adapter->wol & WAKE_UCAST) {
3413 pmConf->filters[i].patternSize = ETH_ALEN;
3414 pmConf->filters[i].maskSize = 1;
3415 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3416 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3417
3418 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3419 i++;
3420 }
3421
3422 if (adapter->wol & WAKE_ARP) {
3423 in_dev = in_dev_get(netdev);
3424 if (!in_dev)
3425 goto skip_arp;
3426
3427 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3428 if (!ifa)
3429 goto skip_arp;
3430
3431 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3432 sizeof(struct arphdr) + /* ARP header */
3433 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3434 2 * sizeof(u32); /*2 IPv4 addresses */
3435 pmConf->filters[i].maskSize =
3436 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3437
3438 /* ETH_P_ARP in Ethernet header. */
3439 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3440 ehdr->h_proto = htons(ETH_P_ARP);
3441
3442 /* ARPOP_REQUEST in ARP header. */
3443 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3444 ahdr->ar_op = htons(ARPOP_REQUEST);
3445 arpreq = (u8 *)(ahdr + 1);
3446
3447 /* The Unicast IPv4 address in 'tip' field. */
3448 arpreq += 2 * ETH_ALEN + sizeof(u32);
3449 *(u32 *)arpreq = ifa->ifa_address;
3450
3451 /* The mask for the relevant bits. */
3452 pmConf->filters[i].mask[0] = 0x00;
3453 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3454 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3455 pmConf->filters[i].mask[3] = 0x00;
3456 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3457 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3458 in_dev_put(in_dev);
3459
3460 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3461 i++;
3462 }
3463
3464 skip_arp:
3465 if (adapter->wol & WAKE_MAGIC)
3466 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3467
3468 pmConf->numFilters = i;
3469
3470 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3471 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3472 *pmConf));
3473 adapter->shared->devRead.pmConfDesc.confPA =
3474 cpu_to_le64(adapter->pm_conf_pa);
3475
3476 spin_lock_irqsave(&adapter->cmd_lock, flags);
3477 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3478 VMXNET3_CMD_UPDATE_PMCFG);
3479 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3480
3481 pci_save_state(pdev);
3482 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3483 adapter->wol);
3484 pci_disable_device(pdev);
3485 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3486
3487 return 0;
3488 }
3489
3490
3491 static int
3492 vmxnet3_resume(struct device *device)
3493 {
3494 int err;
3495 unsigned long flags;
3496 struct pci_dev *pdev = to_pci_dev(device);
3497 struct net_device *netdev = pci_get_drvdata(pdev);
3498 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3499
3500 if (!netif_running(netdev))
3501 return 0;
3502
3503 pci_set_power_state(pdev, PCI_D0);
3504 pci_restore_state(pdev);
3505 err = pci_enable_device_mem(pdev);
3506 if (err != 0)
3507 return err;
3508
3509 pci_enable_wake(pdev, PCI_D0, 0);
3510
3511 vmxnet3_alloc_intr_resources(adapter);
3512
3513 /* During hibernate and suspend, device has to be reinitialized as the
3514 * device state need not be preserved.
3515 */
3516
3517 /* Need not check adapter state as other reset tasks cannot run during
3518 * device resume.
3519 */
3520 spin_lock_irqsave(&adapter->cmd_lock, flags);
3521 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3522 VMXNET3_CMD_QUIESCE_DEV);
3523 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3524 vmxnet3_tq_cleanup_all(adapter);
3525 vmxnet3_rq_cleanup_all(adapter);
3526
3527 vmxnet3_reset_dev(adapter);
3528 err = vmxnet3_activate_dev(adapter);
3529 if (err != 0) {
3530 netdev_err(netdev,
3531 "failed to re-activate on resume, error: %d", err);
3532 vmxnet3_force_close(adapter);
3533 return err;
3534 }
3535 netif_device_attach(netdev);
3536
3537 return 0;
3538 }
3539
3540 static const struct dev_pm_ops vmxnet3_pm_ops = {
3541 .suspend = vmxnet3_suspend,
3542 .resume = vmxnet3_resume,
3543 .freeze = vmxnet3_suspend,
3544 .restore = vmxnet3_resume,
3545 };
3546 #endif
3547
3548 static struct pci_driver vmxnet3_driver = {
3549 .name = vmxnet3_driver_name,
3550 .id_table = vmxnet3_pciid_table,
3551 .probe = vmxnet3_probe_device,
3552 .remove = vmxnet3_remove_device,
3553 .shutdown = vmxnet3_shutdown_device,
3554 #ifdef CONFIG_PM
3555 .driver.pm = &vmxnet3_pm_ops,
3556 #endif
3557 };
3558
3559
3560 static int __init
3561 vmxnet3_init_module(void)
3562 {
3563 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
3564 VMXNET3_DRIVER_VERSION_REPORT);
3565 return pci_register_driver(&vmxnet3_driver);
3566 }
3567
3568 module_init(vmxnet3_init_module);
3569
3570
3571 static void
3572 vmxnet3_exit_module(void)
3573 {
3574 pci_unregister_driver(&vmxnet3_driver);
3575 }
3576
3577 module_exit(vmxnet3_exit_module);
3578
3579 MODULE_AUTHOR("VMware, Inc.");
3580 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3581 MODULE_LICENSE("GPL v2");
3582 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
Linux kernel - Deliverables
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