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netdev: pass the stuck queue to the timeout handler
[openwrt/staging/blogic.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2016, 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: 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 /* Prevent any &gdesc->tcd field from being (speculatively)
373 * read before (&gdesc->tcd)->gen is read.
374 */
375 dma_rmb();
376
377 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
378 &gdesc->tcd), tq, adapter->pdev,
379 adapter);
380
381 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
382 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
383 }
384
385 if (completed) {
386 spin_lock(&tq->tx_lock);
387 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
388 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
389 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
390 netif_carrier_ok(adapter->netdev))) {
391 vmxnet3_tq_wake(tq, adapter);
392 }
393 spin_unlock(&tq->tx_lock);
394 }
395 return completed;
396 }
397
398
399 static void
400 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
401 struct vmxnet3_adapter *adapter)
402 {
403 int i;
404
405 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
406 struct vmxnet3_tx_buf_info *tbi;
407
408 tbi = tq->buf_info + tq->tx_ring.next2comp;
409
410 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
411 if (tbi->skb) {
412 dev_kfree_skb_any(tbi->skb);
413 tbi->skb = NULL;
414 }
415 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
416 }
417
418 /* sanity check, verify all buffers are indeed unmapped and freed */
419 for (i = 0; i < tq->tx_ring.size; i++) {
420 BUG_ON(tq->buf_info[i].skb != NULL ||
421 tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
422 }
423
424 tq->tx_ring.gen = VMXNET3_INIT_GEN;
425 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
426
427 tq->comp_ring.gen = VMXNET3_INIT_GEN;
428 tq->comp_ring.next2proc = 0;
429 }
430
431
432 static void
433 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
434 struct vmxnet3_adapter *adapter)
435 {
436 if (tq->tx_ring.base) {
437 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size *
438 sizeof(struct Vmxnet3_TxDesc),
439 tq->tx_ring.base, tq->tx_ring.basePA);
440 tq->tx_ring.base = NULL;
441 }
442 if (tq->data_ring.base) {
443 dma_free_coherent(&adapter->pdev->dev,
444 tq->data_ring.size * tq->txdata_desc_size,
445 tq->data_ring.base, tq->data_ring.basePA);
446 tq->data_ring.base = NULL;
447 }
448 if (tq->comp_ring.base) {
449 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size *
450 sizeof(struct Vmxnet3_TxCompDesc),
451 tq->comp_ring.base, tq->comp_ring.basePA);
452 tq->comp_ring.base = NULL;
453 }
454 if (tq->buf_info) {
455 dma_free_coherent(&adapter->pdev->dev,
456 tq->tx_ring.size * sizeof(tq->buf_info[0]),
457 tq->buf_info, tq->buf_info_pa);
458 tq->buf_info = NULL;
459 }
460 }
461
462
463 /* Destroy all tx queues */
464 void
465 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
466 {
467 int i;
468
469 for (i = 0; i < adapter->num_tx_queues; i++)
470 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
471 }
472
473
474 static void
475 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
476 struct vmxnet3_adapter *adapter)
477 {
478 int i;
479
480 /* reset the tx ring contents to 0 and reset the tx ring states */
481 memset(tq->tx_ring.base, 0, tq->tx_ring.size *
482 sizeof(struct Vmxnet3_TxDesc));
483 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
484 tq->tx_ring.gen = VMXNET3_INIT_GEN;
485
486 memset(tq->data_ring.base, 0,
487 tq->data_ring.size * tq->txdata_desc_size);
488
489 /* reset the tx comp ring contents to 0 and reset comp ring states */
490 memset(tq->comp_ring.base, 0, tq->comp_ring.size *
491 sizeof(struct Vmxnet3_TxCompDesc));
492 tq->comp_ring.next2proc = 0;
493 tq->comp_ring.gen = VMXNET3_INIT_GEN;
494
495 /* reset the bookkeeping data */
496 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
497 for (i = 0; i < tq->tx_ring.size; i++)
498 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
499
500 /* stats are not reset */
501 }
502
503
504 static int
505 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
506 struct vmxnet3_adapter *adapter)
507 {
508 size_t sz;
509
510 BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
511 tq->comp_ring.base || tq->buf_info);
512
513 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
514 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc),
515 &tq->tx_ring.basePA, GFP_KERNEL);
516 if (!tq->tx_ring.base) {
517 netdev_err(adapter->netdev, "failed to allocate tx ring\n");
518 goto err;
519 }
520
521 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
522 tq->data_ring.size * tq->txdata_desc_size,
523 &tq->data_ring.basePA, GFP_KERNEL);
524 if (!tq->data_ring.base) {
525 netdev_err(adapter->netdev, "failed to allocate tx data ring\n");
526 goto err;
527 }
528
529 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
530 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
531 &tq->comp_ring.basePA, GFP_KERNEL);
532 if (!tq->comp_ring.base) {
533 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
534 goto err;
535 }
536
537 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]);
538 tq->buf_info = dma_alloc_coherent(&adapter->pdev->dev, sz,
539 &tq->buf_info_pa, GFP_KERNEL);
540 if (!tq->buf_info)
541 goto err;
542
543 return 0;
544
545 err:
546 vmxnet3_tq_destroy(tq, adapter);
547 return -ENOMEM;
548 }
549
550 static void
551 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
552 {
553 int i;
554
555 for (i = 0; i < adapter->num_tx_queues; i++)
556 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
557 }
558
559 /*
560 * starting from ring->next2fill, allocate rx buffers for the given ring
561 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
562 * are allocated or allocation fails
563 */
564
565 static int
566 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
567 int num_to_alloc, struct vmxnet3_adapter *adapter)
568 {
569 int num_allocated = 0;
570 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
571 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
572 u32 val;
573
574 while (num_allocated <= num_to_alloc) {
575 struct vmxnet3_rx_buf_info *rbi;
576 union Vmxnet3_GenericDesc *gd;
577
578 rbi = rbi_base + ring->next2fill;
579 gd = ring->base + ring->next2fill;
580
581 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
582 if (rbi->skb == NULL) {
583 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
584 rbi->len,
585 GFP_KERNEL);
586 if (unlikely(rbi->skb == NULL)) {
587 rq->stats.rx_buf_alloc_failure++;
588 break;
589 }
590
591 rbi->dma_addr = dma_map_single(
592 &adapter->pdev->dev,
593 rbi->skb->data, rbi->len,
594 PCI_DMA_FROMDEVICE);
595 if (dma_mapping_error(&adapter->pdev->dev,
596 rbi->dma_addr)) {
597 dev_kfree_skb_any(rbi->skb);
598 rq->stats.rx_buf_alloc_failure++;
599 break;
600 }
601 } else {
602 /* rx buffer skipped by the device */
603 }
604 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
605 } else {
606 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
607 rbi->len != PAGE_SIZE);
608
609 if (rbi->page == NULL) {
610 rbi->page = alloc_page(GFP_ATOMIC);
611 if (unlikely(rbi->page == NULL)) {
612 rq->stats.rx_buf_alloc_failure++;
613 break;
614 }
615 rbi->dma_addr = dma_map_page(
616 &adapter->pdev->dev,
617 rbi->page, 0, PAGE_SIZE,
618 PCI_DMA_FROMDEVICE);
619 if (dma_mapping_error(&adapter->pdev->dev,
620 rbi->dma_addr)) {
621 put_page(rbi->page);
622 rq->stats.rx_buf_alloc_failure++;
623 break;
624 }
625 } else {
626 /* rx buffers skipped by the device */
627 }
628 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
629 }
630
631 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
632 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
633 | val | rbi->len);
634
635 /* Fill the last buffer but dont mark it ready, or else the
636 * device will think that the queue is full */
637 if (num_allocated == num_to_alloc)
638 break;
639
640 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
641 num_allocated++;
642 vmxnet3_cmd_ring_adv_next2fill(ring);
643 }
644
645 netdev_dbg(adapter->netdev,
646 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
647 num_allocated, ring->next2fill, ring->next2comp);
648
649 /* so that the device can distinguish a full ring and an empty ring */
650 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
651
652 return num_allocated;
653 }
654
655
656 static void
657 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
658 struct vmxnet3_rx_buf_info *rbi)
659 {
660 skb_frag_t *frag = skb_shinfo(skb)->frags + skb_shinfo(skb)->nr_frags;
661
662 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
663
664 __skb_frag_set_page(frag, rbi->page);
665 skb_frag_off_set(frag, 0);
666 skb_frag_size_set(frag, rcd->len);
667 skb->data_len += rcd->len;
668 skb->truesize += PAGE_SIZE;
669 skb_shinfo(skb)->nr_frags++;
670 }
671
672
673 static int
674 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
675 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
676 struct vmxnet3_adapter *adapter)
677 {
678 u32 dw2, len;
679 unsigned long buf_offset;
680 int i;
681 union Vmxnet3_GenericDesc *gdesc;
682 struct vmxnet3_tx_buf_info *tbi = NULL;
683
684 BUG_ON(ctx->copy_size > skb_headlen(skb));
685
686 /* use the previous gen bit for the SOP desc */
687 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
688
689 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
690 gdesc = ctx->sop_txd; /* both loops below can be skipped */
691
692 /* no need to map the buffer if headers are copied */
693 if (ctx->copy_size) {
694 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
695 tq->tx_ring.next2fill *
696 tq->txdata_desc_size);
697 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
698 ctx->sop_txd->dword[3] = 0;
699
700 tbi = tq->buf_info + tq->tx_ring.next2fill;
701 tbi->map_type = VMXNET3_MAP_NONE;
702
703 netdev_dbg(adapter->netdev,
704 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
705 tq->tx_ring.next2fill,
706 le64_to_cpu(ctx->sop_txd->txd.addr),
707 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
708 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
709
710 /* use the right gen for non-SOP desc */
711 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
712 }
713
714 /* linear part can use multiple tx desc if it's big */
715 len = skb_headlen(skb) - ctx->copy_size;
716 buf_offset = ctx->copy_size;
717 while (len) {
718 u32 buf_size;
719
720 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
721 buf_size = len;
722 dw2 |= len;
723 } else {
724 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
725 /* spec says that for TxDesc.len, 0 == 2^14 */
726 }
727
728 tbi = tq->buf_info + tq->tx_ring.next2fill;
729 tbi->map_type = VMXNET3_MAP_SINGLE;
730 tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
731 skb->data + buf_offset, buf_size,
732 PCI_DMA_TODEVICE);
733 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
734 return -EFAULT;
735
736 tbi->len = buf_size;
737
738 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
739 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
740
741 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
742 gdesc->dword[2] = cpu_to_le32(dw2);
743 gdesc->dword[3] = 0;
744
745 netdev_dbg(adapter->netdev,
746 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
747 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
748 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
749 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
750 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
751
752 len -= buf_size;
753 buf_offset += buf_size;
754 }
755
756 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
757 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
758 u32 buf_size;
759
760 buf_offset = 0;
761 len = skb_frag_size(frag);
762 while (len) {
763 tbi = tq->buf_info + tq->tx_ring.next2fill;
764 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
765 buf_size = len;
766 dw2 |= len;
767 } else {
768 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
769 /* spec says that for TxDesc.len, 0 == 2^14 */
770 }
771 tbi->map_type = VMXNET3_MAP_PAGE;
772 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
773 buf_offset, buf_size,
774 DMA_TO_DEVICE);
775 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
776 return -EFAULT;
777
778 tbi->len = buf_size;
779
780 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
781 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
782
783 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
784 gdesc->dword[2] = cpu_to_le32(dw2);
785 gdesc->dword[3] = 0;
786
787 netdev_dbg(adapter->netdev,
788 "txd[%u]: 0x%llx %u %u\n",
789 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
790 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
791 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
792 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
793
794 len -= buf_size;
795 buf_offset += buf_size;
796 }
797 }
798
799 ctx->eop_txd = gdesc;
800
801 /* set the last buf_info for the pkt */
802 tbi->skb = skb;
803 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
804
805 return 0;
806 }
807
808
809 /* Init all tx queues */
810 static void
811 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
812 {
813 int i;
814
815 for (i = 0; i < adapter->num_tx_queues; i++)
816 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
817 }
818
819
820 /*
821 * parse relevant protocol headers:
822 * For a tso pkt, relevant headers are L2/3/4 including options
823 * For a pkt requesting csum offloading, they are L2/3 and may include L4
824 * if it's a TCP/UDP pkt
825 *
826 * Returns:
827 * -1: error happens during parsing
828 * 0: protocol headers parsed, but too big to be copied
829 * 1: protocol headers parsed and copied
830 *
831 * Other effects:
832 * 1. related *ctx fields are updated.
833 * 2. ctx->copy_size is # of bytes copied
834 * 3. the portion to be copied is guaranteed to be in the linear part
835 *
836 */
837 static int
838 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
839 struct vmxnet3_tx_ctx *ctx,
840 struct vmxnet3_adapter *adapter)
841 {
842 u8 protocol = 0;
843
844 if (ctx->mss) { /* TSO */
845 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
846 ctx->l4_hdr_size = tcp_hdrlen(skb);
847 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
848 } else {
849 if (skb->ip_summed == CHECKSUM_PARTIAL) {
850 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
851
852 if (ctx->ipv4) {
853 const struct iphdr *iph = ip_hdr(skb);
854
855 protocol = iph->protocol;
856 } else if (ctx->ipv6) {
857 const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
858
859 protocol = ipv6h->nexthdr;
860 }
861
862 switch (protocol) {
863 case IPPROTO_TCP:
864 ctx->l4_hdr_size = tcp_hdrlen(skb);
865 break;
866 case IPPROTO_UDP:
867 ctx->l4_hdr_size = sizeof(struct udphdr);
868 break;
869 default:
870 ctx->l4_hdr_size = 0;
871 break;
872 }
873
874 ctx->copy_size = min(ctx->eth_ip_hdr_size +
875 ctx->l4_hdr_size, skb->len);
876 } else {
877 ctx->eth_ip_hdr_size = 0;
878 ctx->l4_hdr_size = 0;
879 /* copy as much as allowed */
880 ctx->copy_size = min_t(unsigned int,
881 tq->txdata_desc_size,
882 skb_headlen(skb));
883 }
884
885 if (skb->len <= VMXNET3_HDR_COPY_SIZE)
886 ctx->copy_size = skb->len;
887
888 /* make sure headers are accessible directly */
889 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
890 goto err;
891 }
892
893 if (unlikely(ctx->copy_size > tq->txdata_desc_size)) {
894 tq->stats.oversized_hdr++;
895 ctx->copy_size = 0;
896 return 0;
897 }
898
899 return 1;
900 err:
901 return -1;
902 }
903
904 /*
905 * copy relevant protocol headers to the transmit ring:
906 * For a tso pkt, relevant headers are L2/3/4 including options
907 * For a pkt requesting csum offloading, they are L2/3 and may include L4
908 * if it's a TCP/UDP pkt
909 *
910 *
911 * Note that this requires that vmxnet3_parse_hdr be called first to set the
912 * appropriate bits in ctx first
913 */
914 static void
915 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
916 struct vmxnet3_tx_ctx *ctx,
917 struct vmxnet3_adapter *adapter)
918 {
919 struct Vmxnet3_TxDataDesc *tdd;
920
921 tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base +
922 tq->tx_ring.next2fill *
923 tq->txdata_desc_size);
924
925 memcpy(tdd->data, skb->data, ctx->copy_size);
926 netdev_dbg(adapter->netdev,
927 "copy %u bytes to dataRing[%u]\n",
928 ctx->copy_size, tq->tx_ring.next2fill);
929 }
930
931
932 static void
933 vmxnet3_prepare_tso(struct sk_buff *skb,
934 struct vmxnet3_tx_ctx *ctx)
935 {
936 struct tcphdr *tcph = tcp_hdr(skb);
937
938 if (ctx->ipv4) {
939 struct iphdr *iph = ip_hdr(skb);
940
941 iph->check = 0;
942 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
943 IPPROTO_TCP, 0);
944 } else if (ctx->ipv6) {
945 struct ipv6hdr *iph = ipv6_hdr(skb);
946
947 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
948 IPPROTO_TCP, 0);
949 }
950 }
951
952 static int txd_estimate(const struct sk_buff *skb)
953 {
954 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
955 int i;
956
957 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
958 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
959
960 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
961 }
962 return count;
963 }
964
965 /*
966 * Transmits a pkt thru a given tq
967 * Returns:
968 * NETDEV_TX_OK: descriptors are setup successfully
969 * NETDEV_TX_OK: error occurred, the pkt is dropped
970 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
971 *
972 * Side-effects:
973 * 1. tx ring may be changed
974 * 2. tq stats may be updated accordingly
975 * 3. shared->txNumDeferred may be updated
976 */
977
978 static int
979 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
980 struct vmxnet3_adapter *adapter, struct net_device *netdev)
981 {
982 int ret;
983 u32 count;
984 int num_pkts;
985 int tx_num_deferred;
986 unsigned long flags;
987 struct vmxnet3_tx_ctx ctx;
988 union Vmxnet3_GenericDesc *gdesc;
989 #ifdef __BIG_ENDIAN_BITFIELD
990 /* Use temporary descriptor to avoid touching bits multiple times */
991 union Vmxnet3_GenericDesc tempTxDesc;
992 #endif
993
994 count = txd_estimate(skb);
995
996 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
997 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
998
999 ctx.mss = skb_shinfo(skb)->gso_size;
1000 if (ctx.mss) {
1001 if (skb_header_cloned(skb)) {
1002 if (unlikely(pskb_expand_head(skb, 0, 0,
1003 GFP_ATOMIC) != 0)) {
1004 tq->stats.drop_tso++;
1005 goto drop_pkt;
1006 }
1007 tq->stats.copy_skb_header++;
1008 }
1009 vmxnet3_prepare_tso(skb, &ctx);
1010 } else {
1011 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
1012
1013 /* non-tso pkts must not use more than
1014 * VMXNET3_MAX_TXD_PER_PKT entries
1015 */
1016 if (skb_linearize(skb) != 0) {
1017 tq->stats.drop_too_many_frags++;
1018 goto drop_pkt;
1019 }
1020 tq->stats.linearized++;
1021
1022 /* recalculate the # of descriptors to use */
1023 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1024 }
1025 }
1026
1027 ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter);
1028 if (ret >= 0) {
1029 BUG_ON(ret <= 0 && ctx.copy_size != 0);
1030 /* hdrs parsed, check against other limits */
1031 if (ctx.mss) {
1032 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
1033 VMXNET3_MAX_TX_BUF_SIZE)) {
1034 tq->stats.drop_oversized_hdr++;
1035 goto drop_pkt;
1036 }
1037 } else {
1038 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1039 if (unlikely(ctx.eth_ip_hdr_size +
1040 skb->csum_offset >
1041 VMXNET3_MAX_CSUM_OFFSET)) {
1042 tq->stats.drop_oversized_hdr++;
1043 goto drop_pkt;
1044 }
1045 }
1046 }
1047 } else {
1048 tq->stats.drop_hdr_inspect_err++;
1049 goto drop_pkt;
1050 }
1051
1052 spin_lock_irqsave(&tq->tx_lock, flags);
1053
1054 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
1055 tq->stats.tx_ring_full++;
1056 netdev_dbg(adapter->netdev,
1057 "tx queue stopped on %s, next2comp %u"
1058 " next2fill %u\n", adapter->netdev->name,
1059 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
1060
1061 vmxnet3_tq_stop(tq, adapter);
1062 spin_unlock_irqrestore(&tq->tx_lock, flags);
1063 return NETDEV_TX_BUSY;
1064 }
1065
1066
1067 vmxnet3_copy_hdr(skb, tq, &ctx, adapter);
1068
1069 /* fill tx descs related to addr & len */
1070 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter))
1071 goto unlock_drop_pkt;
1072
1073 /* setup the EOP desc */
1074 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1075
1076 /* setup the SOP desc */
1077 #ifdef __BIG_ENDIAN_BITFIELD
1078 gdesc = &tempTxDesc;
1079 gdesc->dword[2] = ctx.sop_txd->dword[2];
1080 gdesc->dword[3] = ctx.sop_txd->dword[3];
1081 #else
1082 gdesc = ctx.sop_txd;
1083 #endif
1084 tx_num_deferred = le32_to_cpu(tq->shared->txNumDeferred);
1085 if (ctx.mss) {
1086 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1087 gdesc->txd.om = VMXNET3_OM_TSO;
1088 gdesc->txd.msscof = ctx.mss;
1089 num_pkts = (skb->len - gdesc->txd.hlen + ctx.mss - 1) / ctx.mss;
1090 } else {
1091 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1092 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1093 gdesc->txd.om = VMXNET3_OM_CSUM;
1094 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1095 skb->csum_offset;
1096 } else {
1097 gdesc->txd.om = 0;
1098 gdesc->txd.msscof = 0;
1099 }
1100 num_pkts = 1;
1101 }
1102 le32_add_cpu(&tq->shared->txNumDeferred, num_pkts);
1103 tx_num_deferred += num_pkts;
1104
1105 if (skb_vlan_tag_present(skb)) {
1106 gdesc->txd.ti = 1;
1107 gdesc->txd.tci = skb_vlan_tag_get(skb);
1108 }
1109
1110 /* Ensure that the write to (&gdesc->txd)->gen will be observed after
1111 * all other writes to &gdesc->txd.
1112 */
1113 dma_wmb();
1114
1115 /* finally flips the GEN bit of the SOP desc. */
1116 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1117 VMXNET3_TXD_GEN);
1118 #ifdef __BIG_ENDIAN_BITFIELD
1119 /* Finished updating in bitfields of Tx Desc, so write them in original
1120 * place.
1121 */
1122 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1123 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1124 gdesc = ctx.sop_txd;
1125 #endif
1126 netdev_dbg(adapter->netdev,
1127 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1128 (u32)(ctx.sop_txd -
1129 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1130 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1131
1132 spin_unlock_irqrestore(&tq->tx_lock, flags);
1133
1134 if (tx_num_deferred >= le32_to_cpu(tq->shared->txThreshold)) {
1135 tq->shared->txNumDeferred = 0;
1136 VMXNET3_WRITE_BAR0_REG(adapter,
1137 VMXNET3_REG_TXPROD + tq->qid * 8,
1138 tq->tx_ring.next2fill);
1139 }
1140
1141 return NETDEV_TX_OK;
1142
1143 unlock_drop_pkt:
1144 spin_unlock_irqrestore(&tq->tx_lock, flags);
1145 drop_pkt:
1146 tq->stats.drop_total++;
1147 dev_kfree_skb_any(skb);
1148 return NETDEV_TX_OK;
1149 }
1150
1151
1152 static netdev_tx_t
1153 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1154 {
1155 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1156
1157 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1158 return vmxnet3_tq_xmit(skb,
1159 &adapter->tx_queue[skb->queue_mapping],
1160 adapter, netdev);
1161 }
1162
1163
1164 static void
1165 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1166 struct sk_buff *skb,
1167 union Vmxnet3_GenericDesc *gdesc)
1168 {
1169 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1170 if (gdesc->rcd.v4 &&
1171 (le32_to_cpu(gdesc->dword[3]) &
1172 VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) {
1173 skb->ip_summed = CHECKSUM_UNNECESSARY;
1174 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1175 BUG_ON(gdesc->rcd.frg);
1176 } else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) &
1177 (1 << VMXNET3_RCD_TUC_SHIFT))) {
1178 skb->ip_summed = CHECKSUM_UNNECESSARY;
1179 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1180 BUG_ON(gdesc->rcd.frg);
1181 } else {
1182 if (gdesc->rcd.csum) {
1183 skb->csum = htons(gdesc->rcd.csum);
1184 skb->ip_summed = CHECKSUM_PARTIAL;
1185 } else {
1186 skb_checksum_none_assert(skb);
1187 }
1188 }
1189 } else {
1190 skb_checksum_none_assert(skb);
1191 }
1192 }
1193
1194
1195 static void
1196 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1197 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1198 {
1199 rq->stats.drop_err++;
1200 if (!rcd->fcs)
1201 rq->stats.drop_fcs++;
1202
1203 rq->stats.drop_total++;
1204
1205 /*
1206 * We do not unmap and chain the rx buffer to the skb.
1207 * We basically pretend this buffer is not used and will be recycled
1208 * by vmxnet3_rq_alloc_rx_buf()
1209 */
1210
1211 /*
1212 * ctx->skb may be NULL if this is the first and the only one
1213 * desc for the pkt
1214 */
1215 if (ctx->skb)
1216 dev_kfree_skb_irq(ctx->skb);
1217
1218 ctx->skb = NULL;
1219 }
1220
1221
1222 static u32
1223 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
1224 union Vmxnet3_GenericDesc *gdesc)
1225 {
1226 u32 hlen, maplen;
1227 union {
1228 void *ptr;
1229 struct ethhdr *eth;
1230 struct vlan_ethhdr *veth;
1231 struct iphdr *ipv4;
1232 struct ipv6hdr *ipv6;
1233 struct tcphdr *tcp;
1234 } hdr;
1235 BUG_ON(gdesc->rcd.tcp == 0);
1236
1237 maplen = skb_headlen(skb);
1238 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
1239 return 0;
1240
1241 if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
1242 skb->protocol == cpu_to_be16(ETH_P_8021AD))
1243 hlen = sizeof(struct vlan_ethhdr);
1244 else
1245 hlen = sizeof(struct ethhdr);
1246
1247 hdr.eth = eth_hdr(skb);
1248 if (gdesc->rcd.v4) {
1249 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP) &&
1250 hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IP));
1251 hdr.ptr += hlen;
1252 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
1253 hlen = hdr.ipv4->ihl << 2;
1254 hdr.ptr += hdr.ipv4->ihl << 2;
1255 } else if (gdesc->rcd.v6) {
1256 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6) &&
1257 hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IPV6));
1258 hdr.ptr += hlen;
1259 /* Use an estimated value, since we also need to handle
1260 * TSO case.
1261 */
1262 if (hdr.ipv6->nexthdr != IPPROTO_TCP)
1263 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
1264 hlen = sizeof(struct ipv6hdr);
1265 hdr.ptr += sizeof(struct ipv6hdr);
1266 } else {
1267 /* Non-IP pkt, dont estimate header length */
1268 return 0;
1269 }
1270
1271 if (hlen + sizeof(struct tcphdr) > maplen)
1272 return 0;
1273
1274 return (hlen + (hdr.tcp->doff << 2));
1275 }
1276
1277 static int
1278 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1279 struct vmxnet3_adapter *adapter, int quota)
1280 {
1281 static const u32 rxprod_reg[2] = {
1282 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1283 };
1284 u32 num_pkts = 0;
1285 bool skip_page_frags = false;
1286 struct Vmxnet3_RxCompDesc *rcd;
1287 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1288 u16 segCnt = 0, mss = 0;
1289 #ifdef __BIG_ENDIAN_BITFIELD
1290 struct Vmxnet3_RxDesc rxCmdDesc;
1291 struct Vmxnet3_RxCompDesc rxComp;
1292 #endif
1293 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1294 &rxComp);
1295 while (rcd->gen == rq->comp_ring.gen) {
1296 struct vmxnet3_rx_buf_info *rbi;
1297 struct sk_buff *skb, *new_skb = NULL;
1298 struct page *new_page = NULL;
1299 dma_addr_t new_dma_addr;
1300 int num_to_alloc;
1301 struct Vmxnet3_RxDesc *rxd;
1302 u32 idx, ring_idx;
1303 struct vmxnet3_cmd_ring *ring = NULL;
1304 if (num_pkts >= quota) {
1305 /* we may stop even before we see the EOP desc of
1306 * the current pkt
1307 */
1308 break;
1309 }
1310
1311 /* Prevent any rcd field from being (speculatively) read before
1312 * rcd->gen is read.
1313 */
1314 dma_rmb();
1315
1316 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 &&
1317 rcd->rqID != rq->dataRingQid);
1318 idx = rcd->rxdIdx;
1319 ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID);
1320 ring = rq->rx_ring + ring_idx;
1321 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1322 &rxCmdDesc);
1323 rbi = rq->buf_info[ring_idx] + idx;
1324
1325 BUG_ON(rxd->addr != rbi->dma_addr ||
1326 rxd->len != rbi->len);
1327
1328 if (unlikely(rcd->eop && rcd->err)) {
1329 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1330 goto rcd_done;
1331 }
1332
1333 if (rcd->sop) { /* first buf of the pkt */
1334 bool rxDataRingUsed;
1335 u16 len;
1336
1337 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1338 (rcd->rqID != rq->qid &&
1339 rcd->rqID != rq->dataRingQid));
1340
1341 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1342 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1343
1344 if (unlikely(rcd->len == 0)) {
1345 /* Pretend the rx buffer is skipped. */
1346 BUG_ON(!(rcd->sop && rcd->eop));
1347 netdev_dbg(adapter->netdev,
1348 "rxRing[%u][%u] 0 length\n",
1349 ring_idx, idx);
1350 goto rcd_done;
1351 }
1352
1353 skip_page_frags = false;
1354 ctx->skb = rbi->skb;
1355
1356 rxDataRingUsed =
1357 VMXNET3_RX_DATA_RING(adapter, rcd->rqID);
1358 len = rxDataRingUsed ? rcd->len : rbi->len;
1359 new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1360 len);
1361 if (new_skb == NULL) {
1362 /* Skb allocation failed, do not handover this
1363 * skb to stack. Reuse it. Drop the existing pkt
1364 */
1365 rq->stats.rx_buf_alloc_failure++;
1366 ctx->skb = NULL;
1367 rq->stats.drop_total++;
1368 skip_page_frags = true;
1369 goto rcd_done;
1370 }
1371
1372 if (rxDataRingUsed) {
1373 size_t sz;
1374
1375 BUG_ON(rcd->len > rq->data_ring.desc_size);
1376
1377 ctx->skb = new_skb;
1378 sz = rcd->rxdIdx * rq->data_ring.desc_size;
1379 memcpy(new_skb->data,
1380 &rq->data_ring.base[sz], rcd->len);
1381 } else {
1382 ctx->skb = rbi->skb;
1383
1384 new_dma_addr =
1385 dma_map_single(&adapter->pdev->dev,
1386 new_skb->data, rbi->len,
1387 PCI_DMA_FROMDEVICE);
1388 if (dma_mapping_error(&adapter->pdev->dev,
1389 new_dma_addr)) {
1390 dev_kfree_skb(new_skb);
1391 /* Skb allocation failed, do not
1392 * handover this skb to stack. Reuse
1393 * it. Drop the existing pkt.
1394 */
1395 rq->stats.rx_buf_alloc_failure++;
1396 ctx->skb = NULL;
1397 rq->stats.drop_total++;
1398 skip_page_frags = true;
1399 goto rcd_done;
1400 }
1401
1402 dma_unmap_single(&adapter->pdev->dev,
1403 rbi->dma_addr,
1404 rbi->len,
1405 PCI_DMA_FROMDEVICE);
1406
1407 /* Immediate refill */
1408 rbi->skb = new_skb;
1409 rbi->dma_addr = new_dma_addr;
1410 rxd->addr = cpu_to_le64(rbi->dma_addr);
1411 rxd->len = rbi->len;
1412 }
1413
1414 #ifdef VMXNET3_RSS
1415 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1416 (adapter->netdev->features & NETIF_F_RXHASH))
1417 skb_set_hash(ctx->skb,
1418 le32_to_cpu(rcd->rssHash),
1419 PKT_HASH_TYPE_L3);
1420 #endif
1421 skb_put(ctx->skb, rcd->len);
1422
1423 if (VMXNET3_VERSION_GE_2(adapter) &&
1424 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
1425 struct Vmxnet3_RxCompDescExt *rcdlro;
1426 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd;
1427
1428 segCnt = rcdlro->segCnt;
1429 WARN_ON_ONCE(segCnt == 0);
1430 mss = rcdlro->mss;
1431 if (unlikely(segCnt <= 1))
1432 segCnt = 0;
1433 } else {
1434 segCnt = 0;
1435 }
1436 } else {
1437 BUG_ON(ctx->skb == NULL && !skip_page_frags);
1438
1439 /* non SOP buffer must be type 1 in most cases */
1440 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1441 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1442
1443 /* If an sop buffer was dropped, skip all
1444 * following non-sop fragments. They will be reused.
1445 */
1446 if (skip_page_frags)
1447 goto rcd_done;
1448
1449 if (rcd->len) {
1450 new_page = alloc_page(GFP_ATOMIC);
1451 /* Replacement page frag could not be allocated.
1452 * Reuse this page. Drop the pkt and free the
1453 * skb which contained this page as a frag. Skip
1454 * processing all the following non-sop frags.
1455 */
1456 if (unlikely(!new_page)) {
1457 rq->stats.rx_buf_alloc_failure++;
1458 dev_kfree_skb(ctx->skb);
1459 ctx->skb = NULL;
1460 skip_page_frags = true;
1461 goto rcd_done;
1462 }
1463 new_dma_addr = dma_map_page(&adapter->pdev->dev,
1464 new_page,
1465 0, PAGE_SIZE,
1466 PCI_DMA_FROMDEVICE);
1467 if (dma_mapping_error(&adapter->pdev->dev,
1468 new_dma_addr)) {
1469 put_page(new_page);
1470 rq->stats.rx_buf_alloc_failure++;
1471 dev_kfree_skb(ctx->skb);
1472 ctx->skb = NULL;
1473 skip_page_frags = true;
1474 goto rcd_done;
1475 }
1476
1477 dma_unmap_page(&adapter->pdev->dev,
1478 rbi->dma_addr, rbi->len,
1479 PCI_DMA_FROMDEVICE);
1480
1481 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1482
1483 /* Immediate refill */
1484 rbi->page = new_page;
1485 rbi->dma_addr = new_dma_addr;
1486 rxd->addr = cpu_to_le64(rbi->dma_addr);
1487 rxd->len = rbi->len;
1488 }
1489 }
1490
1491
1492 skb = ctx->skb;
1493 if (rcd->eop) {
1494 u32 mtu = adapter->netdev->mtu;
1495 skb->len += skb->data_len;
1496
1497 vmxnet3_rx_csum(adapter, skb,
1498 (union Vmxnet3_GenericDesc *)rcd);
1499 skb->protocol = eth_type_trans(skb, adapter->netdev);
1500 if (!rcd->tcp ||
1501 !(adapter->netdev->features & NETIF_F_LRO))
1502 goto not_lro;
1503
1504 if (segCnt != 0 && mss != 0) {
1505 skb_shinfo(skb)->gso_type = rcd->v4 ?
1506 SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1507 skb_shinfo(skb)->gso_size = mss;
1508 skb_shinfo(skb)->gso_segs = segCnt;
1509 } else if (segCnt != 0 || skb->len > mtu) {
1510 u32 hlen;
1511
1512 hlen = vmxnet3_get_hdr_len(adapter, skb,
1513 (union Vmxnet3_GenericDesc *)rcd);
1514 if (hlen == 0)
1515 goto not_lro;
1516
1517 skb_shinfo(skb)->gso_type =
1518 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1519 if (segCnt != 0) {
1520 skb_shinfo(skb)->gso_segs = segCnt;
1521 skb_shinfo(skb)->gso_size =
1522 DIV_ROUND_UP(skb->len -
1523 hlen, segCnt);
1524 } else {
1525 skb_shinfo(skb)->gso_size = mtu - hlen;
1526 }
1527 }
1528 not_lro:
1529 if (unlikely(rcd->ts))
1530 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1531
1532 if (adapter->netdev->features & NETIF_F_LRO)
1533 netif_receive_skb(skb);
1534 else
1535 napi_gro_receive(&rq->napi, skb);
1536
1537 ctx->skb = NULL;
1538 num_pkts++;
1539 }
1540
1541 rcd_done:
1542 /* device may have skipped some rx descs */
1543 ring->next2comp = idx;
1544 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1545 ring = rq->rx_ring + ring_idx;
1546
1547 /* Ensure that the writes to rxd->gen bits will be observed
1548 * after all other writes to rxd objects.
1549 */
1550 dma_wmb();
1551
1552 while (num_to_alloc) {
1553 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1554 &rxCmdDesc);
1555 BUG_ON(!rxd->addr);
1556
1557 /* Recv desc is ready to be used by the device */
1558 rxd->gen = ring->gen;
1559 vmxnet3_cmd_ring_adv_next2fill(ring);
1560 num_to_alloc--;
1561 }
1562
1563 /* if needed, update the register */
1564 if (unlikely(rq->shared->updateRxProd)) {
1565 VMXNET3_WRITE_BAR0_REG(adapter,
1566 rxprod_reg[ring_idx] + rq->qid * 8,
1567 ring->next2fill);
1568 }
1569
1570 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1571 vmxnet3_getRxComp(rcd,
1572 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1573 }
1574
1575 return num_pkts;
1576 }
1577
1578
1579 static void
1580 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1581 struct vmxnet3_adapter *adapter)
1582 {
1583 u32 i, ring_idx;
1584 struct Vmxnet3_RxDesc *rxd;
1585
1586 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1587 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1588 #ifdef __BIG_ENDIAN_BITFIELD
1589 struct Vmxnet3_RxDesc rxDesc;
1590 #endif
1591 vmxnet3_getRxDesc(rxd,
1592 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1593
1594 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1595 rq->buf_info[ring_idx][i].skb) {
1596 dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1597 rxd->len, PCI_DMA_FROMDEVICE);
1598 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1599 rq->buf_info[ring_idx][i].skb = NULL;
1600 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1601 rq->buf_info[ring_idx][i].page) {
1602 dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1603 rxd->len, PCI_DMA_FROMDEVICE);
1604 put_page(rq->buf_info[ring_idx][i].page);
1605 rq->buf_info[ring_idx][i].page = NULL;
1606 }
1607 }
1608
1609 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1610 rq->rx_ring[ring_idx].next2fill =
1611 rq->rx_ring[ring_idx].next2comp = 0;
1612 }
1613
1614 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1615 rq->comp_ring.next2proc = 0;
1616 }
1617
1618
1619 static void
1620 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1621 {
1622 int i;
1623
1624 for (i = 0; i < adapter->num_rx_queues; i++)
1625 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1626 }
1627
1628
1629 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1630 struct vmxnet3_adapter *adapter)
1631 {
1632 int i;
1633 int j;
1634
1635 /* all rx buffers must have already been freed */
1636 for (i = 0; i < 2; i++) {
1637 if (rq->buf_info[i]) {
1638 for (j = 0; j < rq->rx_ring[i].size; j++)
1639 BUG_ON(rq->buf_info[i][j].page != NULL);
1640 }
1641 }
1642
1643
1644 for (i = 0; i < 2; i++) {
1645 if (rq->rx_ring[i].base) {
1646 dma_free_coherent(&adapter->pdev->dev,
1647 rq->rx_ring[i].size
1648 * sizeof(struct Vmxnet3_RxDesc),
1649 rq->rx_ring[i].base,
1650 rq->rx_ring[i].basePA);
1651 rq->rx_ring[i].base = NULL;
1652 }
1653 }
1654
1655 if (rq->data_ring.base) {
1656 dma_free_coherent(&adapter->pdev->dev,
1657 rq->rx_ring[0].size * rq->data_ring.desc_size,
1658 rq->data_ring.base, rq->data_ring.basePA);
1659 rq->data_ring.base = NULL;
1660 }
1661
1662 if (rq->comp_ring.base) {
1663 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
1664 * sizeof(struct Vmxnet3_RxCompDesc),
1665 rq->comp_ring.base, rq->comp_ring.basePA);
1666 rq->comp_ring.base = NULL;
1667 }
1668
1669 if (rq->buf_info[0]) {
1670 size_t sz = sizeof(struct vmxnet3_rx_buf_info) *
1671 (rq->rx_ring[0].size + rq->rx_ring[1].size);
1672 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
1673 rq->buf_info_pa);
1674 rq->buf_info[0] = rq->buf_info[1] = NULL;
1675 }
1676 }
1677
1678 static void
1679 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter)
1680 {
1681 int i;
1682
1683 for (i = 0; i < adapter->num_rx_queues; i++) {
1684 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1685
1686 if (rq->data_ring.base) {
1687 dma_free_coherent(&adapter->pdev->dev,
1688 (rq->rx_ring[0].size *
1689 rq->data_ring.desc_size),
1690 rq->data_ring.base,
1691 rq->data_ring.basePA);
1692 rq->data_ring.base = NULL;
1693 rq->data_ring.desc_size = 0;
1694 }
1695 }
1696 }
1697
1698 static int
1699 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1700 struct vmxnet3_adapter *adapter)
1701 {
1702 int i;
1703
1704 /* initialize buf_info */
1705 for (i = 0; i < rq->rx_ring[0].size; i++) {
1706
1707 /* 1st buf for a pkt is skbuff */
1708 if (i % adapter->rx_buf_per_pkt == 0) {
1709 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1710 rq->buf_info[0][i].len = adapter->skb_buf_size;
1711 } else { /* subsequent bufs for a pkt is frag */
1712 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1713 rq->buf_info[0][i].len = PAGE_SIZE;
1714 }
1715 }
1716 for (i = 0; i < rq->rx_ring[1].size; i++) {
1717 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1718 rq->buf_info[1][i].len = PAGE_SIZE;
1719 }
1720
1721 /* reset internal state and allocate buffers for both rings */
1722 for (i = 0; i < 2; i++) {
1723 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1724
1725 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1726 sizeof(struct Vmxnet3_RxDesc));
1727 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1728 }
1729 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1730 adapter) == 0) {
1731 /* at least has 1 rx buffer for the 1st ring */
1732 return -ENOMEM;
1733 }
1734 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1735
1736 /* reset the comp ring */
1737 rq->comp_ring.next2proc = 0;
1738 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1739 sizeof(struct Vmxnet3_RxCompDesc));
1740 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1741
1742 /* reset rxctx */
1743 rq->rx_ctx.skb = NULL;
1744
1745 /* stats are not reset */
1746 return 0;
1747 }
1748
1749
1750 static int
1751 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1752 {
1753 int i, err = 0;
1754
1755 for (i = 0; i < adapter->num_rx_queues; i++) {
1756 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1757 if (unlikely(err)) {
1758 dev_err(&adapter->netdev->dev, "%s: failed to "
1759 "initialize rx queue%i\n",
1760 adapter->netdev->name, i);
1761 break;
1762 }
1763 }
1764 return err;
1765
1766 }
1767
1768
1769 static int
1770 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1771 {
1772 int i;
1773 size_t sz;
1774 struct vmxnet3_rx_buf_info *bi;
1775
1776 for (i = 0; i < 2; i++) {
1777
1778 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1779 rq->rx_ring[i].base = dma_alloc_coherent(
1780 &adapter->pdev->dev, sz,
1781 &rq->rx_ring[i].basePA,
1782 GFP_KERNEL);
1783 if (!rq->rx_ring[i].base) {
1784 netdev_err(adapter->netdev,
1785 "failed to allocate rx ring %d\n", i);
1786 goto err;
1787 }
1788 }
1789
1790 if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) {
1791 sz = rq->rx_ring[0].size * rq->data_ring.desc_size;
1792 rq->data_ring.base =
1793 dma_alloc_coherent(&adapter->pdev->dev, sz,
1794 &rq->data_ring.basePA,
1795 GFP_KERNEL);
1796 if (!rq->data_ring.base) {
1797 netdev_err(adapter->netdev,
1798 "rx data ring will be disabled\n");
1799 adapter->rxdataring_enabled = false;
1800 }
1801 } else {
1802 rq->data_ring.base = NULL;
1803 rq->data_ring.desc_size = 0;
1804 }
1805
1806 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1807 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
1808 &rq->comp_ring.basePA,
1809 GFP_KERNEL);
1810 if (!rq->comp_ring.base) {
1811 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
1812 goto err;
1813 }
1814
1815 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1816 rq->rx_ring[1].size);
1817 bi = dma_alloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa,
1818 GFP_KERNEL);
1819 if (!bi)
1820 goto err;
1821
1822 rq->buf_info[0] = bi;
1823 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1824
1825 return 0;
1826
1827 err:
1828 vmxnet3_rq_destroy(rq, adapter);
1829 return -ENOMEM;
1830 }
1831
1832
1833 static int
1834 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1835 {
1836 int i, err = 0;
1837
1838 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
1839
1840 for (i = 0; i < adapter->num_rx_queues; i++) {
1841 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1842 if (unlikely(err)) {
1843 dev_err(&adapter->netdev->dev,
1844 "%s: failed to create rx queue%i\n",
1845 adapter->netdev->name, i);
1846 goto err_out;
1847 }
1848 }
1849
1850 if (!adapter->rxdataring_enabled)
1851 vmxnet3_rq_destroy_all_rxdataring(adapter);
1852
1853 return err;
1854 err_out:
1855 vmxnet3_rq_destroy_all(adapter);
1856 return err;
1857
1858 }
1859
1860 /* Multiple queue aware polling function for tx and rx */
1861
1862 static int
1863 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1864 {
1865 int rcd_done = 0, i;
1866 if (unlikely(adapter->shared->ecr))
1867 vmxnet3_process_events(adapter);
1868 for (i = 0; i < adapter->num_tx_queues; i++)
1869 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1870
1871 for (i = 0; i < adapter->num_rx_queues; i++)
1872 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1873 adapter, budget);
1874 return rcd_done;
1875 }
1876
1877
1878 static int
1879 vmxnet3_poll(struct napi_struct *napi, int budget)
1880 {
1881 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1882 struct vmxnet3_rx_queue, napi);
1883 int rxd_done;
1884
1885 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1886
1887 if (rxd_done < budget) {
1888 napi_complete_done(napi, rxd_done);
1889 vmxnet3_enable_all_intrs(rx_queue->adapter);
1890 }
1891 return rxd_done;
1892 }
1893
1894 /*
1895 * NAPI polling function for MSI-X mode with multiple Rx queues
1896 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1897 */
1898
1899 static int
1900 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1901 {
1902 struct vmxnet3_rx_queue *rq = container_of(napi,
1903 struct vmxnet3_rx_queue, napi);
1904 struct vmxnet3_adapter *adapter = rq->adapter;
1905 int rxd_done;
1906
1907 /* When sharing interrupt with corresponding tx queue, process
1908 * tx completions in that queue as well
1909 */
1910 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1911 struct vmxnet3_tx_queue *tq =
1912 &adapter->tx_queue[rq - adapter->rx_queue];
1913 vmxnet3_tq_tx_complete(tq, adapter);
1914 }
1915
1916 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1917
1918 if (rxd_done < budget) {
1919 napi_complete_done(napi, rxd_done);
1920 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1921 }
1922 return rxd_done;
1923 }
1924
1925
1926 #ifdef CONFIG_PCI_MSI
1927
1928 /*
1929 * Handle completion interrupts on tx queues
1930 * Returns whether or not the intr is handled
1931 */
1932
1933 static irqreturn_t
1934 vmxnet3_msix_tx(int irq, void *data)
1935 {
1936 struct vmxnet3_tx_queue *tq = data;
1937 struct vmxnet3_adapter *adapter = tq->adapter;
1938
1939 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1940 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1941
1942 /* Handle the case where only one irq is allocate for all tx queues */
1943 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1944 int i;
1945 for (i = 0; i < adapter->num_tx_queues; i++) {
1946 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1947 vmxnet3_tq_tx_complete(txq, adapter);
1948 }
1949 } else {
1950 vmxnet3_tq_tx_complete(tq, adapter);
1951 }
1952 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1953
1954 return IRQ_HANDLED;
1955 }
1956
1957
1958 /*
1959 * Handle completion interrupts on rx queues. Returns whether or not the
1960 * intr is handled
1961 */
1962
1963 static irqreturn_t
1964 vmxnet3_msix_rx(int irq, void *data)
1965 {
1966 struct vmxnet3_rx_queue *rq = data;
1967 struct vmxnet3_adapter *adapter = rq->adapter;
1968
1969 /* disable intr if needed */
1970 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1971 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1972 napi_schedule(&rq->napi);
1973
1974 return IRQ_HANDLED;
1975 }
1976
1977 /*
1978 *----------------------------------------------------------------------------
1979 *
1980 * vmxnet3_msix_event --
1981 *
1982 * vmxnet3 msix event intr handler
1983 *
1984 * Result:
1985 * whether or not the intr is handled
1986 *
1987 *----------------------------------------------------------------------------
1988 */
1989
1990 static irqreturn_t
1991 vmxnet3_msix_event(int irq, void *data)
1992 {
1993 struct net_device *dev = data;
1994 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1995
1996 /* disable intr if needed */
1997 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1998 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1999
2000 if (adapter->shared->ecr)
2001 vmxnet3_process_events(adapter);
2002
2003 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
2004
2005 return IRQ_HANDLED;
2006 }
2007
2008 #endif /* CONFIG_PCI_MSI */
2009
2010
2011 /* Interrupt handler for vmxnet3 */
2012 static irqreturn_t
2013 vmxnet3_intr(int irq, void *dev_id)
2014 {
2015 struct net_device *dev = dev_id;
2016 struct vmxnet3_adapter *adapter = netdev_priv(dev);
2017
2018 if (adapter->intr.type == VMXNET3_IT_INTX) {
2019 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
2020 if (unlikely(icr == 0))
2021 /* not ours */
2022 return IRQ_NONE;
2023 }
2024
2025
2026 /* disable intr if needed */
2027 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
2028 vmxnet3_disable_all_intrs(adapter);
2029
2030 napi_schedule(&adapter->rx_queue[0].napi);
2031
2032 return IRQ_HANDLED;
2033 }
2034
2035 #ifdef CONFIG_NET_POLL_CONTROLLER
2036
2037 /* netpoll callback. */
2038 static void
2039 vmxnet3_netpoll(struct net_device *netdev)
2040 {
2041 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2042
2043 switch (adapter->intr.type) {
2044 #ifdef CONFIG_PCI_MSI
2045 case VMXNET3_IT_MSIX: {
2046 int i;
2047 for (i = 0; i < adapter->num_rx_queues; i++)
2048 vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
2049 break;
2050 }
2051 #endif
2052 case VMXNET3_IT_MSI:
2053 default:
2054 vmxnet3_intr(0, adapter->netdev);
2055 break;
2056 }
2057
2058 }
2059 #endif /* CONFIG_NET_POLL_CONTROLLER */
2060
2061 static int
2062 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
2063 {
2064 struct vmxnet3_intr *intr = &adapter->intr;
2065 int err = 0, i;
2066 int vector = 0;
2067
2068 #ifdef CONFIG_PCI_MSI
2069 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2070 for (i = 0; i < adapter->num_tx_queues; i++) {
2071 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2072 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
2073 adapter->netdev->name, vector);
2074 err = request_irq(
2075 intr->msix_entries[vector].vector,
2076 vmxnet3_msix_tx, 0,
2077 adapter->tx_queue[i].name,
2078 &adapter->tx_queue[i]);
2079 } else {
2080 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
2081 adapter->netdev->name, vector);
2082 }
2083 if (err) {
2084 dev_err(&adapter->netdev->dev,
2085 "Failed to request irq for MSIX, %s, "
2086 "error %d\n",
2087 adapter->tx_queue[i].name, err);
2088 return err;
2089 }
2090
2091 /* Handle the case where only 1 MSIx was allocated for
2092 * all tx queues */
2093 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
2094 for (; i < adapter->num_tx_queues; i++)
2095 adapter->tx_queue[i].comp_ring.intr_idx
2096 = vector;
2097 vector++;
2098 break;
2099 } else {
2100 adapter->tx_queue[i].comp_ring.intr_idx
2101 = vector++;
2102 }
2103 }
2104 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
2105 vector = 0;
2106
2107 for (i = 0; i < adapter->num_rx_queues; i++) {
2108 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
2109 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
2110 adapter->netdev->name, vector);
2111 else
2112 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
2113 adapter->netdev->name, vector);
2114 err = request_irq(intr->msix_entries[vector].vector,
2115 vmxnet3_msix_rx, 0,
2116 adapter->rx_queue[i].name,
2117 &(adapter->rx_queue[i]));
2118 if (err) {
2119 netdev_err(adapter->netdev,
2120 "Failed to request irq for MSIX, "
2121 "%s, error %d\n",
2122 adapter->rx_queue[i].name, err);
2123 return err;
2124 }
2125
2126 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
2127 }
2128
2129 sprintf(intr->event_msi_vector_name, "%s-event-%d",
2130 adapter->netdev->name, vector);
2131 err = request_irq(intr->msix_entries[vector].vector,
2132 vmxnet3_msix_event, 0,
2133 intr->event_msi_vector_name, adapter->netdev);
2134 intr->event_intr_idx = vector;
2135
2136 } else if (intr->type == VMXNET3_IT_MSI) {
2137 adapter->num_rx_queues = 1;
2138 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
2139 adapter->netdev->name, adapter->netdev);
2140 } else {
2141 #endif
2142 adapter->num_rx_queues = 1;
2143 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
2144 IRQF_SHARED, adapter->netdev->name,
2145 adapter->netdev);
2146 #ifdef CONFIG_PCI_MSI
2147 }
2148 #endif
2149 intr->num_intrs = vector + 1;
2150 if (err) {
2151 netdev_err(adapter->netdev,
2152 "Failed to request irq (intr type:%d), error %d\n",
2153 intr->type, err);
2154 } else {
2155 /* Number of rx queues will not change after this */
2156 for (i = 0; i < adapter->num_rx_queues; i++) {
2157 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2158 rq->qid = i;
2159 rq->qid2 = i + adapter->num_rx_queues;
2160 rq->dataRingQid = i + 2 * adapter->num_rx_queues;
2161 }
2162
2163 /* init our intr settings */
2164 for (i = 0; i < intr->num_intrs; i++)
2165 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
2166 if (adapter->intr.type != VMXNET3_IT_MSIX) {
2167 adapter->intr.event_intr_idx = 0;
2168 for (i = 0; i < adapter->num_tx_queues; i++)
2169 adapter->tx_queue[i].comp_ring.intr_idx = 0;
2170 adapter->rx_queue[0].comp_ring.intr_idx = 0;
2171 }
2172
2173 netdev_info(adapter->netdev,
2174 "intr type %u, mode %u, %u vectors allocated\n",
2175 intr->type, intr->mask_mode, intr->num_intrs);
2176 }
2177
2178 return err;
2179 }
2180
2181
2182 static void
2183 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
2184 {
2185 struct vmxnet3_intr *intr = &adapter->intr;
2186 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
2187
2188 switch (intr->type) {
2189 #ifdef CONFIG_PCI_MSI
2190 case VMXNET3_IT_MSIX:
2191 {
2192 int i, vector = 0;
2193
2194 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2195 for (i = 0; i < adapter->num_tx_queues; i++) {
2196 free_irq(intr->msix_entries[vector++].vector,
2197 &(adapter->tx_queue[i]));
2198 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
2199 break;
2200 }
2201 }
2202
2203 for (i = 0; i < adapter->num_rx_queues; i++) {
2204 free_irq(intr->msix_entries[vector++].vector,
2205 &(adapter->rx_queue[i]));
2206 }
2207
2208 free_irq(intr->msix_entries[vector].vector,
2209 adapter->netdev);
2210 BUG_ON(vector >= intr->num_intrs);
2211 break;
2212 }
2213 #endif
2214 case VMXNET3_IT_MSI:
2215 free_irq(adapter->pdev->irq, adapter->netdev);
2216 break;
2217 case VMXNET3_IT_INTX:
2218 free_irq(adapter->pdev->irq, adapter->netdev);
2219 break;
2220 default:
2221 BUG();
2222 }
2223 }
2224
2225
2226 static void
2227 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
2228 {
2229 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2230 u16 vid;
2231
2232 /* allow untagged pkts */
2233 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
2234
2235 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2236 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2237 }
2238
2239
2240 static int
2241 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2242 {
2243 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2244
2245 if (!(netdev->flags & IFF_PROMISC)) {
2246 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2247 unsigned long flags;
2248
2249 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2250 spin_lock_irqsave(&adapter->cmd_lock, flags);
2251 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2252 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2253 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2254 }
2255
2256 set_bit(vid, adapter->active_vlans);
2257
2258 return 0;
2259 }
2260
2261
2262 static int
2263 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2264 {
2265 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2266
2267 if (!(netdev->flags & IFF_PROMISC)) {
2268 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2269 unsigned long flags;
2270
2271 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2272 spin_lock_irqsave(&adapter->cmd_lock, flags);
2273 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2274 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2275 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2276 }
2277
2278 clear_bit(vid, adapter->active_vlans);
2279
2280 return 0;
2281 }
2282
2283
2284 static u8 *
2285 vmxnet3_copy_mc(struct net_device *netdev)
2286 {
2287 u8 *buf = NULL;
2288 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2289
2290 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2291 if (sz <= 0xffff) {
2292 /* We may be called with BH disabled */
2293 buf = kmalloc(sz, GFP_ATOMIC);
2294 if (buf) {
2295 struct netdev_hw_addr *ha;
2296 int i = 0;
2297
2298 netdev_for_each_mc_addr(ha, netdev)
2299 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2300 ETH_ALEN);
2301 }
2302 }
2303 return buf;
2304 }
2305
2306
2307 static void
2308 vmxnet3_set_mc(struct net_device *netdev)
2309 {
2310 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2311 unsigned long flags;
2312 struct Vmxnet3_RxFilterConf *rxConf =
2313 &adapter->shared->devRead.rxFilterConf;
2314 u8 *new_table = NULL;
2315 dma_addr_t new_table_pa = 0;
2316 bool new_table_pa_valid = false;
2317 u32 new_mode = VMXNET3_RXM_UCAST;
2318
2319 if (netdev->flags & IFF_PROMISC) {
2320 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2321 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2322
2323 new_mode |= VMXNET3_RXM_PROMISC;
2324 } else {
2325 vmxnet3_restore_vlan(adapter);
2326 }
2327
2328 if (netdev->flags & IFF_BROADCAST)
2329 new_mode |= VMXNET3_RXM_BCAST;
2330
2331 if (netdev->flags & IFF_ALLMULTI)
2332 new_mode |= VMXNET3_RXM_ALL_MULTI;
2333 else
2334 if (!netdev_mc_empty(netdev)) {
2335 new_table = vmxnet3_copy_mc(netdev);
2336 if (new_table) {
2337 size_t sz = netdev_mc_count(netdev) * ETH_ALEN;
2338
2339 rxConf->mfTableLen = cpu_to_le16(sz);
2340 new_table_pa = dma_map_single(
2341 &adapter->pdev->dev,
2342 new_table,
2343 sz,
2344 PCI_DMA_TODEVICE);
2345 if (!dma_mapping_error(&adapter->pdev->dev,
2346 new_table_pa)) {
2347 new_mode |= VMXNET3_RXM_MCAST;
2348 new_table_pa_valid = true;
2349 rxConf->mfTablePA = cpu_to_le64(
2350 new_table_pa);
2351 }
2352 }
2353 if (!new_table_pa_valid) {
2354 netdev_info(netdev,
2355 "failed to copy mcast list, setting ALL_MULTI\n");
2356 new_mode |= VMXNET3_RXM_ALL_MULTI;
2357 }
2358 }
2359
2360 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2361 rxConf->mfTableLen = 0;
2362 rxConf->mfTablePA = 0;
2363 }
2364
2365 spin_lock_irqsave(&adapter->cmd_lock, flags);
2366 if (new_mode != rxConf->rxMode) {
2367 rxConf->rxMode = cpu_to_le32(new_mode);
2368 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2369 VMXNET3_CMD_UPDATE_RX_MODE);
2370 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2371 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2372 }
2373
2374 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2375 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2376 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2377
2378 if (new_table_pa_valid)
2379 dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2380 rxConf->mfTableLen, PCI_DMA_TODEVICE);
2381 kfree(new_table);
2382 }
2383
2384 void
2385 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2386 {
2387 int i;
2388
2389 for (i = 0; i < adapter->num_rx_queues; i++)
2390 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2391 }
2392
2393
2394 /*
2395 * Set up driver_shared based on settings in adapter.
2396 */
2397
2398 static void
2399 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2400 {
2401 struct Vmxnet3_DriverShared *shared = adapter->shared;
2402 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2403 struct Vmxnet3_TxQueueConf *tqc;
2404 struct Vmxnet3_RxQueueConf *rqc;
2405 int i;
2406
2407 memset(shared, 0, sizeof(*shared));
2408
2409 /* driver settings */
2410 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2411 devRead->misc.driverInfo.version = cpu_to_le32(
2412 VMXNET3_DRIVER_VERSION_NUM);
2413 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2414 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2415 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2416 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2417 *((u32 *)&devRead->misc.driverInfo.gos));
2418 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2419 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2420
2421 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2422 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2423
2424 /* set up feature flags */
2425 if (adapter->netdev->features & NETIF_F_RXCSUM)
2426 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2427
2428 if (adapter->netdev->features & NETIF_F_LRO) {
2429 devRead->misc.uptFeatures |= UPT1_F_LRO;
2430 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2431 }
2432 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2433 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2434
2435 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2436 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2437 devRead->misc.queueDescLen = cpu_to_le32(
2438 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2439 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2440
2441 /* tx queue settings */
2442 devRead->misc.numTxQueues = adapter->num_tx_queues;
2443 for (i = 0; i < adapter->num_tx_queues; i++) {
2444 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2445 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2446 tqc = &adapter->tqd_start[i].conf;
2447 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2448 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2449 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2450 tqc->ddPA = cpu_to_le64(tq->buf_info_pa);
2451 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2452 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2453 tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size);
2454 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2455 tqc->ddLen = cpu_to_le32(
2456 sizeof(struct vmxnet3_tx_buf_info) *
2457 tqc->txRingSize);
2458 tqc->intrIdx = tq->comp_ring.intr_idx;
2459 }
2460
2461 /* rx queue settings */
2462 devRead->misc.numRxQueues = adapter->num_rx_queues;
2463 for (i = 0; i < adapter->num_rx_queues; i++) {
2464 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2465 rqc = &adapter->rqd_start[i].conf;
2466 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2467 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2468 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2469 rqc->ddPA = cpu_to_le64(rq->buf_info_pa);
2470 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2471 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2472 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2473 rqc->ddLen = cpu_to_le32(
2474 sizeof(struct vmxnet3_rx_buf_info) *
2475 (rqc->rxRingSize[0] +
2476 rqc->rxRingSize[1]));
2477 rqc->intrIdx = rq->comp_ring.intr_idx;
2478 if (VMXNET3_VERSION_GE_3(adapter)) {
2479 rqc->rxDataRingBasePA =
2480 cpu_to_le64(rq->data_ring.basePA);
2481 rqc->rxDataRingDescSize =
2482 cpu_to_le16(rq->data_ring.desc_size);
2483 }
2484 }
2485
2486 #ifdef VMXNET3_RSS
2487 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2488
2489 if (adapter->rss) {
2490 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2491
2492 devRead->misc.uptFeatures |= UPT1_F_RSS;
2493 devRead->misc.numRxQueues = adapter->num_rx_queues;
2494 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2495 UPT1_RSS_HASH_TYPE_IPV4 |
2496 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2497 UPT1_RSS_HASH_TYPE_IPV6;
2498 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2499 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2500 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2501 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2502
2503 for (i = 0; i < rssConf->indTableSize; i++)
2504 rssConf->indTable[i] = ethtool_rxfh_indir_default(
2505 i, adapter->num_rx_queues);
2506
2507 devRead->rssConfDesc.confVer = 1;
2508 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2509 devRead->rssConfDesc.confPA =
2510 cpu_to_le64(adapter->rss_conf_pa);
2511 }
2512
2513 #endif /* VMXNET3_RSS */
2514
2515 /* intr settings */
2516 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2517 VMXNET3_IMM_AUTO;
2518 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2519 for (i = 0; i < adapter->intr.num_intrs; i++)
2520 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2521
2522 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2523 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2524
2525 /* rx filter settings */
2526 devRead->rxFilterConf.rxMode = 0;
2527 vmxnet3_restore_vlan(adapter);
2528 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2529
2530 /* the rest are already zeroed */
2531 }
2532
2533 static void
2534 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter)
2535 {
2536 struct Vmxnet3_DriverShared *shared = adapter->shared;
2537 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2538 unsigned long flags;
2539
2540 if (!VMXNET3_VERSION_GE_3(adapter))
2541 return;
2542
2543 spin_lock_irqsave(&adapter->cmd_lock, flags);
2544 cmdInfo->varConf.confVer = 1;
2545 cmdInfo->varConf.confLen =
2546 cpu_to_le32(sizeof(*adapter->coal_conf));
2547 cmdInfo->varConf.confPA = cpu_to_le64(adapter->coal_conf_pa);
2548
2549 if (adapter->default_coal_mode) {
2550 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2551 VMXNET3_CMD_GET_COALESCE);
2552 } else {
2553 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2554 VMXNET3_CMD_SET_COALESCE);
2555 }
2556
2557 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2558 }
2559
2560 int
2561 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2562 {
2563 int err, i;
2564 u32 ret;
2565 unsigned long flags;
2566
2567 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2568 " ring sizes %u %u %u\n", adapter->netdev->name,
2569 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2570 adapter->tx_queue[0].tx_ring.size,
2571 adapter->rx_queue[0].rx_ring[0].size,
2572 adapter->rx_queue[0].rx_ring[1].size);
2573
2574 vmxnet3_tq_init_all(adapter);
2575 err = vmxnet3_rq_init_all(adapter);
2576 if (err) {
2577 netdev_err(adapter->netdev,
2578 "Failed to init rx queue error %d\n", err);
2579 goto rq_err;
2580 }
2581
2582 err = vmxnet3_request_irqs(adapter);
2583 if (err) {
2584 netdev_err(adapter->netdev,
2585 "Failed to setup irq for error %d\n", err);
2586 goto irq_err;
2587 }
2588
2589 vmxnet3_setup_driver_shared(adapter);
2590
2591 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2592 adapter->shared_pa));
2593 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2594 adapter->shared_pa));
2595 spin_lock_irqsave(&adapter->cmd_lock, flags);
2596 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2597 VMXNET3_CMD_ACTIVATE_DEV);
2598 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2599 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2600
2601 if (ret != 0) {
2602 netdev_err(adapter->netdev,
2603 "Failed to activate dev: error %u\n", ret);
2604 err = -EINVAL;
2605 goto activate_err;
2606 }
2607
2608 vmxnet3_init_coalesce(adapter);
2609
2610 for (i = 0; i < adapter->num_rx_queues; i++) {
2611 VMXNET3_WRITE_BAR0_REG(adapter,
2612 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2613 adapter->rx_queue[i].rx_ring[0].next2fill);
2614 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2615 (i * VMXNET3_REG_ALIGN)),
2616 adapter->rx_queue[i].rx_ring[1].next2fill);
2617 }
2618
2619 /* Apply the rx filter settins last. */
2620 vmxnet3_set_mc(adapter->netdev);
2621
2622 /*
2623 * Check link state when first activating device. It will start the
2624 * tx queue if the link is up.
2625 */
2626 vmxnet3_check_link(adapter, true);
2627 for (i = 0; i < adapter->num_rx_queues; i++)
2628 napi_enable(&adapter->rx_queue[i].napi);
2629 vmxnet3_enable_all_intrs(adapter);
2630 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2631 return 0;
2632
2633 activate_err:
2634 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2635 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2636 vmxnet3_free_irqs(adapter);
2637 irq_err:
2638 rq_err:
2639 /* free up buffers we allocated */
2640 vmxnet3_rq_cleanup_all(adapter);
2641 return err;
2642 }
2643
2644
2645 void
2646 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2647 {
2648 unsigned long flags;
2649 spin_lock_irqsave(&adapter->cmd_lock, flags);
2650 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2651 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2652 }
2653
2654
2655 int
2656 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2657 {
2658 int i;
2659 unsigned long flags;
2660 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2661 return 0;
2662
2663
2664 spin_lock_irqsave(&adapter->cmd_lock, flags);
2665 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2666 VMXNET3_CMD_QUIESCE_DEV);
2667 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2668 vmxnet3_disable_all_intrs(adapter);
2669
2670 for (i = 0; i < adapter->num_rx_queues; i++)
2671 napi_disable(&adapter->rx_queue[i].napi);
2672 netif_tx_disable(adapter->netdev);
2673 adapter->link_speed = 0;
2674 netif_carrier_off(adapter->netdev);
2675
2676 vmxnet3_tq_cleanup_all(adapter);
2677 vmxnet3_rq_cleanup_all(adapter);
2678 vmxnet3_free_irqs(adapter);
2679 return 0;
2680 }
2681
2682
2683 static void
2684 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2685 {
2686 u32 tmp;
2687
2688 tmp = *(u32 *)mac;
2689 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2690
2691 tmp = (mac[5] << 8) | mac[4];
2692 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2693 }
2694
2695
2696 static int
2697 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2698 {
2699 struct sockaddr *addr = p;
2700 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2701
2702 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2703 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2704
2705 return 0;
2706 }
2707
2708
2709 /* ==================== initialization and cleanup routines ============ */
2710
2711 static int
2712 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter)
2713 {
2714 int err;
2715 unsigned long mmio_start, mmio_len;
2716 struct pci_dev *pdev = adapter->pdev;
2717
2718 err = pci_enable_device(pdev);
2719 if (err) {
2720 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
2721 return err;
2722 }
2723
2724 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2725 vmxnet3_driver_name);
2726 if (err) {
2727 dev_err(&pdev->dev,
2728 "Failed to request region for adapter: error %d\n", err);
2729 goto err_enable_device;
2730 }
2731
2732 pci_set_master(pdev);
2733
2734 mmio_start = pci_resource_start(pdev, 0);
2735 mmio_len = pci_resource_len(pdev, 0);
2736 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2737 if (!adapter->hw_addr0) {
2738 dev_err(&pdev->dev, "Failed to map bar0\n");
2739 err = -EIO;
2740 goto err_ioremap;
2741 }
2742
2743 mmio_start = pci_resource_start(pdev, 1);
2744 mmio_len = pci_resource_len(pdev, 1);
2745 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2746 if (!adapter->hw_addr1) {
2747 dev_err(&pdev->dev, "Failed to map bar1\n");
2748 err = -EIO;
2749 goto err_bar1;
2750 }
2751 return 0;
2752
2753 err_bar1:
2754 iounmap(adapter->hw_addr0);
2755 err_ioremap:
2756 pci_release_selected_regions(pdev, (1 << 2) - 1);
2757 err_enable_device:
2758 pci_disable_device(pdev);
2759 return err;
2760 }
2761
2762
2763 static void
2764 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2765 {
2766 BUG_ON(!adapter->pdev);
2767
2768 iounmap(adapter->hw_addr0);
2769 iounmap(adapter->hw_addr1);
2770 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2771 pci_disable_device(adapter->pdev);
2772 }
2773
2774
2775 static void
2776 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2777 {
2778 size_t sz, i, ring0_size, ring1_size, comp_size;
2779 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2780 VMXNET3_MAX_ETH_HDR_SIZE) {
2781 adapter->skb_buf_size = adapter->netdev->mtu +
2782 VMXNET3_MAX_ETH_HDR_SIZE;
2783 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2784 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2785
2786 adapter->rx_buf_per_pkt = 1;
2787 } else {
2788 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2789 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2790 VMXNET3_MAX_ETH_HDR_SIZE;
2791 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2792 }
2793
2794 /*
2795 * for simplicity, force the ring0 size to be a multiple of
2796 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2797 */
2798 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2799 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2800 ring0_size = (ring0_size + sz - 1) / sz * sz;
2801 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2802 sz * sz);
2803 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2804 ring1_size = (ring1_size + sz - 1) / sz * sz;
2805 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
2806 sz * sz);
2807 comp_size = ring0_size + ring1_size;
2808
2809 for (i = 0; i < adapter->num_rx_queues; i++) {
2810 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2811
2812 rq->rx_ring[0].size = ring0_size;
2813 rq->rx_ring[1].size = ring1_size;
2814 rq->comp_ring.size = comp_size;
2815 }
2816 }
2817
2818
2819 int
2820 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2821 u32 rx_ring_size, u32 rx_ring2_size,
2822 u16 txdata_desc_size, u16 rxdata_desc_size)
2823 {
2824 int err = 0, i;
2825
2826 for (i = 0; i < adapter->num_tx_queues; i++) {
2827 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2828 tq->tx_ring.size = tx_ring_size;
2829 tq->data_ring.size = tx_ring_size;
2830 tq->comp_ring.size = tx_ring_size;
2831 tq->txdata_desc_size = txdata_desc_size;
2832 tq->shared = &adapter->tqd_start[i].ctrl;
2833 tq->stopped = true;
2834 tq->adapter = adapter;
2835 tq->qid = i;
2836 err = vmxnet3_tq_create(tq, adapter);
2837 /*
2838 * Too late to change num_tx_queues. We cannot do away with
2839 * lesser number of queues than what we asked for
2840 */
2841 if (err)
2842 goto queue_err;
2843 }
2844
2845 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2846 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2847 vmxnet3_adjust_rx_ring_size(adapter);
2848
2849 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
2850 for (i = 0; i < adapter->num_rx_queues; i++) {
2851 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2852 /* qid and qid2 for rx queues will be assigned later when num
2853 * of rx queues is finalized after allocating intrs */
2854 rq->shared = &adapter->rqd_start[i].ctrl;
2855 rq->adapter = adapter;
2856 rq->data_ring.desc_size = rxdata_desc_size;
2857 err = vmxnet3_rq_create(rq, adapter);
2858 if (err) {
2859 if (i == 0) {
2860 netdev_err(adapter->netdev,
2861 "Could not allocate any rx queues. "
2862 "Aborting.\n");
2863 goto queue_err;
2864 } else {
2865 netdev_info(adapter->netdev,
2866 "Number of rx queues changed "
2867 "to : %d.\n", i);
2868 adapter->num_rx_queues = i;
2869 err = 0;
2870 break;
2871 }
2872 }
2873 }
2874
2875 if (!adapter->rxdataring_enabled)
2876 vmxnet3_rq_destroy_all_rxdataring(adapter);
2877
2878 return err;
2879 queue_err:
2880 vmxnet3_tq_destroy_all(adapter);
2881 return err;
2882 }
2883
2884 static int
2885 vmxnet3_open(struct net_device *netdev)
2886 {
2887 struct vmxnet3_adapter *adapter;
2888 int err, i;
2889
2890 adapter = netdev_priv(netdev);
2891
2892 for (i = 0; i < adapter->num_tx_queues; i++)
2893 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2894
2895 if (VMXNET3_VERSION_GE_3(adapter)) {
2896 unsigned long flags;
2897 u16 txdata_desc_size;
2898
2899 spin_lock_irqsave(&adapter->cmd_lock, flags);
2900 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2901 VMXNET3_CMD_GET_TXDATA_DESC_SIZE);
2902 txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter,
2903 VMXNET3_REG_CMD);
2904 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2905
2906 if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) ||
2907 (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) ||
2908 (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) {
2909 adapter->txdata_desc_size =
2910 sizeof(struct Vmxnet3_TxDataDesc);
2911 } else {
2912 adapter->txdata_desc_size = txdata_desc_size;
2913 }
2914 } else {
2915 adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc);
2916 }
2917
2918 err = vmxnet3_create_queues(adapter,
2919 adapter->tx_ring_size,
2920 adapter->rx_ring_size,
2921 adapter->rx_ring2_size,
2922 adapter->txdata_desc_size,
2923 adapter->rxdata_desc_size);
2924 if (err)
2925 goto queue_err;
2926
2927 err = vmxnet3_activate_dev(adapter);
2928 if (err)
2929 goto activate_err;
2930
2931 return 0;
2932
2933 activate_err:
2934 vmxnet3_rq_destroy_all(adapter);
2935 vmxnet3_tq_destroy_all(adapter);
2936 queue_err:
2937 return err;
2938 }
2939
2940
2941 static int
2942 vmxnet3_close(struct net_device *netdev)
2943 {
2944 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2945
2946 /*
2947 * Reset_work may be in the middle of resetting the device, wait for its
2948 * completion.
2949 */
2950 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2951 usleep_range(1000, 2000);
2952
2953 vmxnet3_quiesce_dev(adapter);
2954
2955 vmxnet3_rq_destroy_all(adapter);
2956 vmxnet3_tq_destroy_all(adapter);
2957
2958 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2959
2960
2961 return 0;
2962 }
2963
2964
2965 void
2966 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2967 {
2968 int i;
2969
2970 /*
2971 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2972 * vmxnet3_close() will deadlock.
2973 */
2974 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2975
2976 /* we need to enable NAPI, otherwise dev_close will deadlock */
2977 for (i = 0; i < adapter->num_rx_queues; i++)
2978 napi_enable(&adapter->rx_queue[i].napi);
2979 /*
2980 * Need to clear the quiesce bit to ensure that vmxnet3_close
2981 * can quiesce the device properly
2982 */
2983 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2984 dev_close(adapter->netdev);
2985 }
2986
2987
2988 static int
2989 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2990 {
2991 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2992 int err = 0;
2993
2994 netdev->mtu = new_mtu;
2995
2996 /*
2997 * Reset_work may be in the middle of resetting the device, wait for its
2998 * completion.
2999 */
3000 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3001 usleep_range(1000, 2000);
3002
3003 if (netif_running(netdev)) {
3004 vmxnet3_quiesce_dev(adapter);
3005 vmxnet3_reset_dev(adapter);
3006
3007 /* we need to re-create the rx queue based on the new mtu */
3008 vmxnet3_rq_destroy_all(adapter);
3009 vmxnet3_adjust_rx_ring_size(adapter);
3010 err = vmxnet3_rq_create_all(adapter);
3011 if (err) {
3012 netdev_err(netdev,
3013 "failed to re-create rx queues, "
3014 " error %d. Closing it.\n", err);
3015 goto out;
3016 }
3017
3018 err = vmxnet3_activate_dev(adapter);
3019 if (err) {
3020 netdev_err(netdev,
3021 "failed to re-activate, error %d. "
3022 "Closing it\n", err);
3023 goto out;
3024 }
3025 }
3026
3027 out:
3028 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3029 if (err)
3030 vmxnet3_force_close(adapter);
3031
3032 return err;
3033 }
3034
3035
3036 static void
3037 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
3038 {
3039 struct net_device *netdev = adapter->netdev;
3040
3041 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
3042 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
3043 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
3044 NETIF_F_LRO;
3045 if (dma64)
3046 netdev->hw_features |= NETIF_F_HIGHDMA;
3047 netdev->vlan_features = netdev->hw_features &
3048 ~(NETIF_F_HW_VLAN_CTAG_TX |
3049 NETIF_F_HW_VLAN_CTAG_RX);
3050 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
3051 }
3052
3053
3054 static void
3055 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
3056 {
3057 u32 tmp;
3058
3059 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
3060 *(u32 *)mac = tmp;
3061
3062 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
3063 mac[4] = tmp & 0xff;
3064 mac[5] = (tmp >> 8) & 0xff;
3065 }
3066
3067 #ifdef CONFIG_PCI_MSI
3068
3069 /*
3070 * Enable MSIx vectors.
3071 * Returns :
3072 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
3073 * were enabled.
3074 * number of vectors which were enabled otherwise (this number is greater
3075 * than VMXNET3_LINUX_MIN_MSIX_VECT)
3076 */
3077
3078 static int
3079 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
3080 {
3081 int ret = pci_enable_msix_range(adapter->pdev,
3082 adapter->intr.msix_entries, nvec, nvec);
3083
3084 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
3085 dev_err(&adapter->netdev->dev,
3086 "Failed to enable %d MSI-X, trying %d\n",
3087 nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
3088
3089 ret = pci_enable_msix_range(adapter->pdev,
3090 adapter->intr.msix_entries,
3091 VMXNET3_LINUX_MIN_MSIX_VECT,
3092 VMXNET3_LINUX_MIN_MSIX_VECT);
3093 }
3094
3095 if (ret < 0) {
3096 dev_err(&adapter->netdev->dev,
3097 "Failed to enable MSI-X, error: %d\n", ret);
3098 }
3099
3100 return ret;
3101 }
3102
3103
3104 #endif /* CONFIG_PCI_MSI */
3105
3106 static void
3107 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
3108 {
3109 u32 cfg;
3110 unsigned long flags;
3111
3112 /* intr settings */
3113 spin_lock_irqsave(&adapter->cmd_lock, flags);
3114 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3115 VMXNET3_CMD_GET_CONF_INTR);
3116 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3117 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3118 adapter->intr.type = cfg & 0x3;
3119 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
3120
3121 if (adapter->intr.type == VMXNET3_IT_AUTO) {
3122 adapter->intr.type = VMXNET3_IT_MSIX;
3123 }
3124
3125 #ifdef CONFIG_PCI_MSI
3126 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3127 int i, nvec;
3128
3129 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
3130 1 : adapter->num_tx_queues;
3131 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
3132 0 : adapter->num_rx_queues;
3133 nvec += 1; /* for link event */
3134 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
3135 nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
3136
3137 for (i = 0; i < nvec; i++)
3138 adapter->intr.msix_entries[i].entry = i;
3139
3140 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec);
3141 if (nvec < 0)
3142 goto msix_err;
3143
3144 /* If we cannot allocate one MSIx vector per queue
3145 * then limit the number of rx queues to 1
3146 */
3147 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) {
3148 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
3149 || adapter->num_rx_queues != 1) {
3150 adapter->share_intr = VMXNET3_INTR_TXSHARE;
3151 netdev_err(adapter->netdev,
3152 "Number of rx queues : 1\n");
3153 adapter->num_rx_queues = 1;
3154 }
3155 }
3156
3157 adapter->intr.num_intrs = nvec;
3158 return;
3159
3160 msix_err:
3161 /* If we cannot allocate MSIx vectors use only one rx queue */
3162 dev_info(&adapter->pdev->dev,
3163 "Failed to enable MSI-X, error %d. "
3164 "Limiting #rx queues to 1, try MSI.\n", nvec);
3165
3166 adapter->intr.type = VMXNET3_IT_MSI;
3167 }
3168
3169 if (adapter->intr.type == VMXNET3_IT_MSI) {
3170 if (!pci_enable_msi(adapter->pdev)) {
3171 adapter->num_rx_queues = 1;
3172 adapter->intr.num_intrs = 1;
3173 return;
3174 }
3175 }
3176 #endif /* CONFIG_PCI_MSI */
3177
3178 adapter->num_rx_queues = 1;
3179 dev_info(&adapter->netdev->dev,
3180 "Using INTx interrupt, #Rx queues: 1.\n");
3181 adapter->intr.type = VMXNET3_IT_INTX;
3182
3183 /* INT-X related setting */
3184 adapter->intr.num_intrs = 1;
3185 }
3186
3187
3188 static void
3189 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
3190 {
3191 if (adapter->intr.type == VMXNET3_IT_MSIX)
3192 pci_disable_msix(adapter->pdev);
3193 else if (adapter->intr.type == VMXNET3_IT_MSI)
3194 pci_disable_msi(adapter->pdev);
3195 else
3196 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
3197 }
3198
3199
3200 static void
3201 vmxnet3_tx_timeout(struct net_device *netdev, unsigned int txqueue)
3202 {
3203 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3204 adapter->tx_timeout_count++;
3205
3206 netdev_err(adapter->netdev, "tx hang\n");
3207 schedule_work(&adapter->work);
3208 }
3209
3210
3211 static void
3212 vmxnet3_reset_work(struct work_struct *data)
3213 {
3214 struct vmxnet3_adapter *adapter;
3215
3216 adapter = container_of(data, struct vmxnet3_adapter, work);
3217
3218 /* if another thread is resetting the device, no need to proceed */
3219 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3220 return;
3221
3222 /* if the device is closed, we must leave it alone */
3223 rtnl_lock();
3224 if (netif_running(adapter->netdev)) {
3225 netdev_notice(adapter->netdev, "resetting\n");
3226 vmxnet3_quiesce_dev(adapter);
3227 vmxnet3_reset_dev(adapter);
3228 vmxnet3_activate_dev(adapter);
3229 } else {
3230 netdev_info(adapter->netdev, "already closed\n");
3231 }
3232 rtnl_unlock();
3233
3234 netif_wake_queue(adapter->netdev);
3235 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3236 }
3237
3238
3239 static int
3240 vmxnet3_probe_device(struct pci_dev *pdev,
3241 const struct pci_device_id *id)
3242 {
3243 static const struct net_device_ops vmxnet3_netdev_ops = {
3244 .ndo_open = vmxnet3_open,
3245 .ndo_stop = vmxnet3_close,
3246 .ndo_start_xmit = vmxnet3_xmit_frame,
3247 .ndo_set_mac_address = vmxnet3_set_mac_addr,
3248 .ndo_change_mtu = vmxnet3_change_mtu,
3249 .ndo_fix_features = vmxnet3_fix_features,
3250 .ndo_set_features = vmxnet3_set_features,
3251 .ndo_get_stats64 = vmxnet3_get_stats64,
3252 .ndo_tx_timeout = vmxnet3_tx_timeout,
3253 .ndo_set_rx_mode = vmxnet3_set_mc,
3254 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
3255 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
3256 #ifdef CONFIG_NET_POLL_CONTROLLER
3257 .ndo_poll_controller = vmxnet3_netpoll,
3258 #endif
3259 };
3260 int err;
3261 bool dma64;
3262 u32 ver;
3263 struct net_device *netdev;
3264 struct vmxnet3_adapter *adapter;
3265 u8 mac[ETH_ALEN];
3266 int size;
3267 int num_tx_queues;
3268 int num_rx_queues;
3269
3270 if (!pci_msi_enabled())
3271 enable_mq = 0;
3272
3273 #ifdef VMXNET3_RSS
3274 if (enable_mq)
3275 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3276 (int)num_online_cpus());
3277 else
3278 #endif
3279 num_rx_queues = 1;
3280 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3281
3282 if (enable_mq)
3283 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
3284 (int)num_online_cpus());
3285 else
3286 num_tx_queues = 1;
3287
3288 num_tx_queues = rounddown_pow_of_two(num_tx_queues);
3289 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
3290 max(num_tx_queues, num_rx_queues));
3291 dev_info(&pdev->dev,
3292 "# of Tx queues : %d, # of Rx queues : %d\n",
3293 num_tx_queues, num_rx_queues);
3294
3295 if (!netdev)
3296 return -ENOMEM;
3297
3298 pci_set_drvdata(pdev, netdev);
3299 adapter = netdev_priv(netdev);
3300 adapter->netdev = netdev;
3301 adapter->pdev = pdev;
3302
3303 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
3304 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
3305 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
3306
3307 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
3308 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
3309 dev_err(&pdev->dev,
3310 "pci_set_consistent_dma_mask failed\n");
3311 err = -EIO;
3312 goto err_set_mask;
3313 }
3314 dma64 = true;
3315 } else {
3316 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
3317 dev_err(&pdev->dev,
3318 "pci_set_dma_mask failed\n");
3319 err = -EIO;
3320 goto err_set_mask;
3321 }
3322 dma64 = false;
3323 }
3324
3325 spin_lock_init(&adapter->cmd_lock);
3326 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
3327 sizeof(struct vmxnet3_adapter),
3328 PCI_DMA_TODEVICE);
3329 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) {
3330 dev_err(&pdev->dev, "Failed to map dma\n");
3331 err = -EFAULT;
3332 goto err_set_mask;
3333 }
3334 adapter->shared = dma_alloc_coherent(
3335 &adapter->pdev->dev,
3336 sizeof(struct Vmxnet3_DriverShared),
3337 &adapter->shared_pa, GFP_KERNEL);
3338 if (!adapter->shared) {
3339 dev_err(&pdev->dev, "Failed to allocate memory\n");
3340 err = -ENOMEM;
3341 goto err_alloc_shared;
3342 }
3343
3344 adapter->num_rx_queues = num_rx_queues;
3345 adapter->num_tx_queues = num_tx_queues;
3346 adapter->rx_buf_per_pkt = 1;
3347
3348 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3349 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3350 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3351 &adapter->queue_desc_pa,
3352 GFP_KERNEL);
3353
3354 if (!adapter->tqd_start) {
3355 dev_err(&pdev->dev, "Failed to allocate memory\n");
3356 err = -ENOMEM;
3357 goto err_alloc_queue_desc;
3358 }
3359 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3360 adapter->num_tx_queues);
3361
3362 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3363 sizeof(struct Vmxnet3_PMConf),
3364 &adapter->pm_conf_pa,
3365 GFP_KERNEL);
3366 if (adapter->pm_conf == NULL) {
3367 err = -ENOMEM;
3368 goto err_alloc_pm;
3369 }
3370
3371 #ifdef VMXNET3_RSS
3372
3373 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
3374 sizeof(struct UPT1_RSSConf),
3375 &adapter->rss_conf_pa,
3376 GFP_KERNEL);
3377 if (adapter->rss_conf == NULL) {
3378 err = -ENOMEM;
3379 goto err_alloc_rss;
3380 }
3381 #endif /* VMXNET3_RSS */
3382
3383 err = vmxnet3_alloc_pci_resources(adapter);
3384 if (err < 0)
3385 goto err_alloc_pci;
3386
3387 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3388 if (ver & (1 << VMXNET3_REV_3)) {
3389 VMXNET3_WRITE_BAR1_REG(adapter,
3390 VMXNET3_REG_VRRS,
3391 1 << VMXNET3_REV_3);
3392 adapter->version = VMXNET3_REV_3 + 1;
3393 } else if (ver & (1 << VMXNET3_REV_2)) {
3394 VMXNET3_WRITE_BAR1_REG(adapter,
3395 VMXNET3_REG_VRRS,
3396 1 << VMXNET3_REV_2);
3397 adapter->version = VMXNET3_REV_2 + 1;
3398 } else if (ver & (1 << VMXNET3_REV_1)) {
3399 VMXNET3_WRITE_BAR1_REG(adapter,
3400 VMXNET3_REG_VRRS,
3401 1 << VMXNET3_REV_1);
3402 adapter->version = VMXNET3_REV_1 + 1;
3403 } else {
3404 dev_err(&pdev->dev,
3405 "Incompatible h/w version (0x%x) for adapter\n", ver);
3406 err = -EBUSY;
3407 goto err_ver;
3408 }
3409 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version);
3410
3411 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3412 if (ver & 1) {
3413 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3414 } else {
3415 dev_err(&pdev->dev,
3416 "Incompatible upt version (0x%x) for adapter\n", ver);
3417 err = -EBUSY;
3418 goto err_ver;
3419 }
3420
3421 if (VMXNET3_VERSION_GE_3(adapter)) {
3422 adapter->coal_conf =
3423 dma_alloc_coherent(&adapter->pdev->dev,
3424 sizeof(struct Vmxnet3_CoalesceScheme)
3425 ,
3426 &adapter->coal_conf_pa,
3427 GFP_KERNEL);
3428 if (!adapter->coal_conf) {
3429 err = -ENOMEM;
3430 goto err_ver;
3431 }
3432 adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
3433 adapter->default_coal_mode = true;
3434 }
3435
3436 SET_NETDEV_DEV(netdev, &pdev->dev);
3437 vmxnet3_declare_features(adapter, dma64);
3438
3439 adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
3440 VMXNET3_DEF_RXDATA_DESC_SIZE : 0;
3441
3442 if (adapter->num_tx_queues == adapter->num_rx_queues)
3443 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
3444 else
3445 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3446
3447 vmxnet3_alloc_intr_resources(adapter);
3448
3449 #ifdef VMXNET3_RSS
3450 if (adapter->num_rx_queues > 1 &&
3451 adapter->intr.type == VMXNET3_IT_MSIX) {
3452 adapter->rss = true;
3453 netdev->hw_features |= NETIF_F_RXHASH;
3454 netdev->features |= NETIF_F_RXHASH;
3455 dev_dbg(&pdev->dev, "RSS is enabled.\n");
3456 } else {
3457 adapter->rss = false;
3458 }
3459 #endif
3460
3461 vmxnet3_read_mac_addr(adapter, mac);
3462 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3463
3464 netdev->netdev_ops = &vmxnet3_netdev_ops;
3465 vmxnet3_set_ethtool_ops(netdev);
3466 netdev->watchdog_timeo = 5 * HZ;
3467
3468 /* MTU range: 60 - 9000 */
3469 netdev->min_mtu = VMXNET3_MIN_MTU;
3470 netdev->max_mtu = VMXNET3_MAX_MTU;
3471
3472 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3473 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3474
3475 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3476 int i;
3477 for (i = 0; i < adapter->num_rx_queues; i++) {
3478 netif_napi_add(adapter->netdev,
3479 &adapter->rx_queue[i].napi,
3480 vmxnet3_poll_rx_only, 64);
3481 }
3482 } else {
3483 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3484 vmxnet3_poll, 64);
3485 }
3486
3487 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3488 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3489
3490 netif_carrier_off(netdev);
3491 err = register_netdev(netdev);
3492
3493 if (err) {
3494 dev_err(&pdev->dev, "Failed to register adapter\n");
3495 goto err_register;
3496 }
3497
3498 vmxnet3_check_link(adapter, false);
3499 return 0;
3500
3501 err_register:
3502 if (VMXNET3_VERSION_GE_3(adapter)) {
3503 dma_free_coherent(&adapter->pdev->dev,
3504 sizeof(struct Vmxnet3_CoalesceScheme),
3505 adapter->coal_conf, adapter->coal_conf_pa);
3506 }
3507 vmxnet3_free_intr_resources(adapter);
3508 err_ver:
3509 vmxnet3_free_pci_resources(adapter);
3510 err_alloc_pci:
3511 #ifdef VMXNET3_RSS
3512 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3513 adapter->rss_conf, adapter->rss_conf_pa);
3514 err_alloc_rss:
3515 #endif
3516 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3517 adapter->pm_conf, adapter->pm_conf_pa);
3518 err_alloc_pm:
3519 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3520 adapter->queue_desc_pa);
3521 err_alloc_queue_desc:
3522 dma_free_coherent(&adapter->pdev->dev,
3523 sizeof(struct Vmxnet3_DriverShared),
3524 adapter->shared, adapter->shared_pa);
3525 err_alloc_shared:
3526 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3527 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3528 err_set_mask:
3529 free_netdev(netdev);
3530 return err;
3531 }
3532
3533
3534 static void
3535 vmxnet3_remove_device(struct pci_dev *pdev)
3536 {
3537 struct net_device *netdev = pci_get_drvdata(pdev);
3538 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3539 int size = 0;
3540 int num_rx_queues;
3541
3542 #ifdef VMXNET3_RSS
3543 if (enable_mq)
3544 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3545 (int)num_online_cpus());
3546 else
3547 #endif
3548 num_rx_queues = 1;
3549 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3550
3551 cancel_work_sync(&adapter->work);
3552
3553 unregister_netdev(netdev);
3554
3555 vmxnet3_free_intr_resources(adapter);
3556 vmxnet3_free_pci_resources(adapter);
3557 if (VMXNET3_VERSION_GE_3(adapter)) {
3558 dma_free_coherent(&adapter->pdev->dev,
3559 sizeof(struct Vmxnet3_CoalesceScheme),
3560 adapter->coal_conf, adapter->coal_conf_pa);
3561 }
3562 #ifdef VMXNET3_RSS
3563 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3564 adapter->rss_conf, adapter->rss_conf_pa);
3565 #endif
3566 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3567 adapter->pm_conf, adapter->pm_conf_pa);
3568
3569 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3570 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3571 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3572 adapter->queue_desc_pa);
3573 dma_free_coherent(&adapter->pdev->dev,
3574 sizeof(struct Vmxnet3_DriverShared),
3575 adapter->shared, adapter->shared_pa);
3576 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3577 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3578 free_netdev(netdev);
3579 }
3580
3581 static void vmxnet3_shutdown_device(struct pci_dev *pdev)
3582 {
3583 struct net_device *netdev = pci_get_drvdata(pdev);
3584 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3585 unsigned long flags;
3586
3587 /* Reset_work may be in the middle of resetting the device, wait for its
3588 * completion.
3589 */
3590 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3591 usleep_range(1000, 2000);
3592
3593 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED,
3594 &adapter->state)) {
3595 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3596 return;
3597 }
3598 spin_lock_irqsave(&adapter->cmd_lock, flags);
3599 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3600 VMXNET3_CMD_QUIESCE_DEV);
3601 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3602 vmxnet3_disable_all_intrs(adapter);
3603
3604 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3605 }
3606
3607
3608 #ifdef CONFIG_PM
3609
3610 static int
3611 vmxnet3_suspend(struct device *device)
3612 {
3613 struct pci_dev *pdev = to_pci_dev(device);
3614 struct net_device *netdev = pci_get_drvdata(pdev);
3615 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3616 struct Vmxnet3_PMConf *pmConf;
3617 struct ethhdr *ehdr;
3618 struct arphdr *ahdr;
3619 u8 *arpreq;
3620 struct in_device *in_dev;
3621 struct in_ifaddr *ifa;
3622 unsigned long flags;
3623 int i = 0;
3624
3625 if (!netif_running(netdev))
3626 return 0;
3627
3628 for (i = 0; i < adapter->num_rx_queues; i++)
3629 napi_disable(&adapter->rx_queue[i].napi);
3630
3631 vmxnet3_disable_all_intrs(adapter);
3632 vmxnet3_free_irqs(adapter);
3633 vmxnet3_free_intr_resources(adapter);
3634
3635 netif_device_detach(netdev);
3636 netif_tx_stop_all_queues(netdev);
3637
3638 /* Create wake-up filters. */
3639 pmConf = adapter->pm_conf;
3640 memset(pmConf, 0, sizeof(*pmConf));
3641
3642 if (adapter->wol & WAKE_UCAST) {
3643 pmConf->filters[i].patternSize = ETH_ALEN;
3644 pmConf->filters[i].maskSize = 1;
3645 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3646 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3647
3648 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3649 i++;
3650 }
3651
3652 if (adapter->wol & WAKE_ARP) {
3653 rcu_read_lock();
3654
3655 in_dev = __in_dev_get_rcu(netdev);
3656 if (!in_dev) {
3657 rcu_read_unlock();
3658 goto skip_arp;
3659 }
3660
3661 ifa = rcu_dereference(in_dev->ifa_list);
3662 if (!ifa) {
3663 rcu_read_unlock();
3664 goto skip_arp;
3665 }
3666
3667 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3668 sizeof(struct arphdr) + /* ARP header */
3669 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3670 2 * sizeof(u32); /*2 IPv4 addresses */
3671 pmConf->filters[i].maskSize =
3672 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3673
3674 /* ETH_P_ARP in Ethernet header. */
3675 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3676 ehdr->h_proto = htons(ETH_P_ARP);
3677
3678 /* ARPOP_REQUEST in ARP header. */
3679 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3680 ahdr->ar_op = htons(ARPOP_REQUEST);
3681 arpreq = (u8 *)(ahdr + 1);
3682
3683 /* The Unicast IPv4 address in 'tip' field. */
3684 arpreq += 2 * ETH_ALEN + sizeof(u32);
3685 *(__be32 *)arpreq = ifa->ifa_address;
3686
3687 rcu_read_unlock();
3688
3689 /* The mask for the relevant bits. */
3690 pmConf->filters[i].mask[0] = 0x00;
3691 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3692 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3693 pmConf->filters[i].mask[3] = 0x00;
3694 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3695 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3696
3697 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3698 i++;
3699 }
3700
3701 skip_arp:
3702 if (adapter->wol & WAKE_MAGIC)
3703 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3704
3705 pmConf->numFilters = i;
3706
3707 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3708 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3709 *pmConf));
3710 adapter->shared->devRead.pmConfDesc.confPA =
3711 cpu_to_le64(adapter->pm_conf_pa);
3712
3713 spin_lock_irqsave(&adapter->cmd_lock, flags);
3714 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3715 VMXNET3_CMD_UPDATE_PMCFG);
3716 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3717
3718 pci_save_state(pdev);
3719 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3720 adapter->wol);
3721 pci_disable_device(pdev);
3722 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3723
3724 return 0;
3725 }
3726
3727
3728 static int
3729 vmxnet3_resume(struct device *device)
3730 {
3731 int err;
3732 unsigned long flags;
3733 struct pci_dev *pdev = to_pci_dev(device);
3734 struct net_device *netdev = pci_get_drvdata(pdev);
3735 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3736
3737 if (!netif_running(netdev))
3738 return 0;
3739
3740 pci_set_power_state(pdev, PCI_D0);
3741 pci_restore_state(pdev);
3742 err = pci_enable_device_mem(pdev);
3743 if (err != 0)
3744 return err;
3745
3746 pci_enable_wake(pdev, PCI_D0, 0);
3747
3748 vmxnet3_alloc_intr_resources(adapter);
3749
3750 /* During hibernate and suspend, device has to be reinitialized as the
3751 * device state need not be preserved.
3752 */
3753
3754 /* Need not check adapter state as other reset tasks cannot run during
3755 * device resume.
3756 */
3757 spin_lock_irqsave(&adapter->cmd_lock, flags);
3758 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3759 VMXNET3_CMD_QUIESCE_DEV);
3760 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3761 vmxnet3_tq_cleanup_all(adapter);
3762 vmxnet3_rq_cleanup_all(adapter);
3763
3764 vmxnet3_reset_dev(adapter);
3765 err = vmxnet3_activate_dev(adapter);
3766 if (err != 0) {
3767 netdev_err(netdev,
3768 "failed to re-activate on resume, error: %d", err);
3769 vmxnet3_force_close(adapter);
3770 return err;
3771 }
3772 netif_device_attach(netdev);
3773
3774 return 0;
3775 }
3776
3777 static const struct dev_pm_ops vmxnet3_pm_ops = {
3778 .suspend = vmxnet3_suspend,
3779 .resume = vmxnet3_resume,
3780 .freeze = vmxnet3_suspend,
3781 .restore = vmxnet3_resume,
3782 };
3783 #endif
3784
3785 static struct pci_driver vmxnet3_driver = {
3786 .name = vmxnet3_driver_name,
3787 .id_table = vmxnet3_pciid_table,
3788 .probe = vmxnet3_probe_device,
3789 .remove = vmxnet3_remove_device,
3790 .shutdown = vmxnet3_shutdown_device,
3791 #ifdef CONFIG_PM
3792 .driver.pm = &vmxnet3_pm_ops,
3793 #endif
3794 };
3795
3796
3797 static int __init
3798 vmxnet3_init_module(void)
3799 {
3800 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
3801 VMXNET3_DRIVER_VERSION_REPORT);
3802 return pci_register_driver(&vmxnet3_driver);
3803 }
3804
3805 module_init(vmxnet3_init_module);
3806
3807
3808 static void
3809 vmxnet3_exit_module(void)
3810 {
3811 pci_unregister_driver(&vmxnet3_driver);
3812 }
3813
3814 module_exit(vmxnet3_exit_module);
3815
3816 MODULE_AUTHOR("VMware, Inc.");
3817 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3818 MODULE_LICENSE("GPL v2");
3819 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
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