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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
[deliverable/linux.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * The full GNU General Public License is included in this distribution in
21 * the file called "COPYING".
22 *
23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24 *
25 */
26
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29
30 #include "vmxnet3_int.h"
31
32 char vmxnet3_driver_name[] = "vmxnet3";
33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
34
35 /*
36 * PCI Device ID Table
37 * Last entry must be all 0s
38 */
39 static const struct pci_device_id vmxnet3_pciid_table[] = {
40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
41 {0}
42 };
43
44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
45
46 static int enable_mq = 1;
47
48 static void
49 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
50
51 /*
52 * Enable/Disable the given intr
53 */
54 static void
55 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
56 {
57 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
58 }
59
60
61 static void
62 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
63 {
64 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
65 }
66
67
68 /*
69 * Enable/Disable all intrs used by the device
70 */
71 static void
72 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
73 {
74 int i;
75
76 for (i = 0; i < adapter->intr.num_intrs; i++)
77 vmxnet3_enable_intr(adapter, i);
78 adapter->shared->devRead.intrConf.intrCtrl &=
79 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
80 }
81
82
83 static void
84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
85 {
86 int i;
87
88 adapter->shared->devRead.intrConf.intrCtrl |=
89 cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
90 for (i = 0; i < adapter->intr.num_intrs; i++)
91 vmxnet3_disable_intr(adapter, i);
92 }
93
94
95 static void
96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
97 {
98 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
99 }
100
101
102 static bool
103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
104 {
105 return tq->stopped;
106 }
107
108
109 static void
110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
111 {
112 tq->stopped = false;
113 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
114 }
115
116
117 static void
118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
119 {
120 tq->stopped = false;
121 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
122 }
123
124
125 static void
126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
127 {
128 tq->stopped = true;
129 tq->num_stop++;
130 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
131 }
132
133
134 /*
135 * Check the link state. This may start or stop the tx queue.
136 */
137 static void
138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
139 {
140 u32 ret;
141 int i;
142 unsigned long flags;
143
144 spin_lock_irqsave(&adapter->cmd_lock, flags);
145 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
146 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
147 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
148
149 adapter->link_speed = ret >> 16;
150 if (ret & 1) { /* Link is up. */
151 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
152 adapter->link_speed);
153 netif_carrier_on(adapter->netdev);
154
155 if (affectTxQueue) {
156 for (i = 0; i < adapter->num_tx_queues; i++)
157 vmxnet3_tq_start(&adapter->tx_queue[i],
158 adapter);
159 }
160 } else {
161 netdev_info(adapter->netdev, "NIC Link is Down\n");
162 netif_carrier_off(adapter->netdev);
163
164 if (affectTxQueue) {
165 for (i = 0; i < adapter->num_tx_queues; i++)
166 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
167 }
168 }
169 }
170
171 static void
172 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
173 {
174 int i;
175 unsigned long flags;
176 u32 events = le32_to_cpu(adapter->shared->ecr);
177 if (!events)
178 return;
179
180 vmxnet3_ack_events(adapter, events);
181
182 /* Check if link state has changed */
183 if (events & VMXNET3_ECR_LINK)
184 vmxnet3_check_link(adapter, true);
185
186 /* Check if there is an error on xmit/recv queues */
187 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
188 spin_lock_irqsave(&adapter->cmd_lock, flags);
189 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
190 VMXNET3_CMD_GET_QUEUE_STATUS);
191 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
192
193 for (i = 0; i < adapter->num_tx_queues; i++)
194 if (adapter->tqd_start[i].status.stopped)
195 dev_err(&adapter->netdev->dev,
196 "%s: tq[%d] error 0x%x\n",
197 adapter->netdev->name, i, le32_to_cpu(
198 adapter->tqd_start[i].status.error));
199 for (i = 0; i < adapter->num_rx_queues; i++)
200 if (adapter->rqd_start[i].status.stopped)
201 dev_err(&adapter->netdev->dev,
202 "%s: rq[%d] error 0x%x\n",
203 adapter->netdev->name, i,
204 adapter->rqd_start[i].status.error);
205
206 schedule_work(&adapter->work);
207 }
208 }
209
210 #ifdef __BIG_ENDIAN_BITFIELD
211 /*
212 * The device expects the bitfields in shared structures to be written in
213 * little endian. When CPU is big endian, the following routines are used to
214 * correctly read and write into ABI.
215 * The general technique used here is : double word bitfields are defined in
216 * opposite order for big endian architecture. Then before reading them in
217 * driver the complete double word is translated using le32_to_cpu. Similarly
218 * After the driver writes into bitfields, cpu_to_le32 is used to translate the
219 * double words into required format.
220 * In order to avoid touching bits in shared structure more than once, temporary
221 * descriptors are used. These are passed as srcDesc to following functions.
222 */
223 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
224 struct Vmxnet3_RxDesc *dstDesc)
225 {
226 u32 *src = (u32 *)srcDesc + 2;
227 u32 *dst = (u32 *)dstDesc + 2;
228 dstDesc->addr = le64_to_cpu(srcDesc->addr);
229 *dst = le32_to_cpu(*src);
230 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
231 }
232
233 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
234 struct Vmxnet3_TxDesc *dstDesc)
235 {
236 int i;
237 u32 *src = (u32 *)(srcDesc + 1);
238 u32 *dst = (u32 *)(dstDesc + 1);
239
240 /* Working backwards so that the gen bit is set at the end. */
241 for (i = 2; i > 0; i--) {
242 src--;
243 dst--;
244 *dst = cpu_to_le32(*src);
245 }
246 }
247
248
249 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
250 struct Vmxnet3_RxCompDesc *dstDesc)
251 {
252 int i = 0;
253 u32 *src = (u32 *)srcDesc;
254 u32 *dst = (u32 *)dstDesc;
255 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
256 *dst = le32_to_cpu(*src);
257 src++;
258 dst++;
259 }
260 }
261
262
263 /* Used to read bitfield values from double words. */
264 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
265 {
266 u32 temp = le32_to_cpu(*bitfield);
267 u32 mask = ((1 << size) - 1) << pos;
268 temp &= mask;
269 temp >>= pos;
270 return temp;
271 }
272
273
274
275 #endif /* __BIG_ENDIAN_BITFIELD */
276
277 #ifdef __BIG_ENDIAN_BITFIELD
278
279 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
280 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
281 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
282 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
283 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
284 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
285 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
286 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
287 VMXNET3_TCD_GEN_SIZE)
288 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
289 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
290 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
291 (dstrcd) = (tmp); \
292 vmxnet3_RxCompToCPU((rcd), (tmp)); \
293 } while (0)
294 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
295 (dstrxd) = (tmp); \
296 vmxnet3_RxDescToCPU((rxd), (tmp)); \
297 } while (0)
298
299 #else
300
301 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
302 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
303 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
304 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
305 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
306 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
307
308 #endif /* __BIG_ENDIAN_BITFIELD */
309
310
311 static void
312 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
313 struct pci_dev *pdev)
314 {
315 if (tbi->map_type == VMXNET3_MAP_SINGLE)
316 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len,
317 PCI_DMA_TODEVICE);
318 else if (tbi->map_type == VMXNET3_MAP_PAGE)
319 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len,
320 PCI_DMA_TODEVICE);
321 else
322 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
323
324 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
325 }
326
327
328 static int
329 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
330 struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
331 {
332 struct sk_buff *skb;
333 int entries = 0;
334
335 /* no out of order completion */
336 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
337 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
338
339 skb = tq->buf_info[eop_idx].skb;
340 BUG_ON(skb == NULL);
341 tq->buf_info[eop_idx].skb = NULL;
342
343 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
344
345 while (tq->tx_ring.next2comp != eop_idx) {
346 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
347 pdev);
348
349 /* update next2comp w/o tx_lock. Since we are marking more,
350 * instead of less, tx ring entries avail, the worst case is
351 * that the tx routine incorrectly re-queues a pkt due to
352 * insufficient tx ring entries.
353 */
354 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
355 entries++;
356 }
357
358 dev_kfree_skb_any(skb);
359 return entries;
360 }
361
362
363 static int
364 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
365 struct vmxnet3_adapter *adapter)
366 {
367 int completed = 0;
368 union Vmxnet3_GenericDesc *gdesc;
369
370 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
371 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
372 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
373 &gdesc->tcd), tq, adapter->pdev,
374 adapter);
375
376 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
377 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
378 }
379
380 if (completed) {
381 spin_lock(&tq->tx_lock);
382 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
383 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
384 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
385 netif_carrier_ok(adapter->netdev))) {
386 vmxnet3_tq_wake(tq, adapter);
387 }
388 spin_unlock(&tq->tx_lock);
389 }
390 return completed;
391 }
392
393
394 static void
395 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
396 struct vmxnet3_adapter *adapter)
397 {
398 int i;
399
400 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
401 struct vmxnet3_tx_buf_info *tbi;
402
403 tbi = tq->buf_info + tq->tx_ring.next2comp;
404
405 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
406 if (tbi->skb) {
407 dev_kfree_skb_any(tbi->skb);
408 tbi->skb = NULL;
409 }
410 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
411 }
412
413 /* sanity check, verify all buffers are indeed unmapped and freed */
414 for (i = 0; i < tq->tx_ring.size; i++) {
415 BUG_ON(tq->buf_info[i].skb != NULL ||
416 tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
417 }
418
419 tq->tx_ring.gen = VMXNET3_INIT_GEN;
420 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
421
422 tq->comp_ring.gen = VMXNET3_INIT_GEN;
423 tq->comp_ring.next2proc = 0;
424 }
425
426
427 static void
428 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
429 struct vmxnet3_adapter *adapter)
430 {
431 if (tq->tx_ring.base) {
432 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size *
433 sizeof(struct Vmxnet3_TxDesc),
434 tq->tx_ring.base, tq->tx_ring.basePA);
435 tq->tx_ring.base = NULL;
436 }
437 if (tq->data_ring.base) {
438 dma_free_coherent(&adapter->pdev->dev, tq->data_ring.size *
439 sizeof(struct Vmxnet3_TxDataDesc),
440 tq->data_ring.base, tq->data_ring.basePA);
441 tq->data_ring.base = NULL;
442 }
443 if (tq->comp_ring.base) {
444 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size *
445 sizeof(struct Vmxnet3_TxCompDesc),
446 tq->comp_ring.base, tq->comp_ring.basePA);
447 tq->comp_ring.base = NULL;
448 }
449 if (tq->buf_info) {
450 dma_free_coherent(&adapter->pdev->dev,
451 tq->tx_ring.size * sizeof(tq->buf_info[0]),
452 tq->buf_info, tq->buf_info_pa);
453 tq->buf_info = NULL;
454 }
455 }
456
457
458 /* Destroy all tx queues */
459 void
460 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
461 {
462 int i;
463
464 for (i = 0; i < adapter->num_tx_queues; i++)
465 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
466 }
467
468
469 static void
470 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
471 struct vmxnet3_adapter *adapter)
472 {
473 int i;
474
475 /* reset the tx ring contents to 0 and reset the tx ring states */
476 memset(tq->tx_ring.base, 0, tq->tx_ring.size *
477 sizeof(struct Vmxnet3_TxDesc));
478 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
479 tq->tx_ring.gen = VMXNET3_INIT_GEN;
480
481 memset(tq->data_ring.base, 0, tq->data_ring.size *
482 sizeof(struct Vmxnet3_TxDataDesc));
483
484 /* reset the tx comp ring contents to 0 and reset comp ring states */
485 memset(tq->comp_ring.base, 0, tq->comp_ring.size *
486 sizeof(struct Vmxnet3_TxCompDesc));
487 tq->comp_ring.next2proc = 0;
488 tq->comp_ring.gen = VMXNET3_INIT_GEN;
489
490 /* reset the bookkeeping data */
491 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
492 for (i = 0; i < tq->tx_ring.size; i++)
493 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
494
495 /* stats are not reset */
496 }
497
498
499 static int
500 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
501 struct vmxnet3_adapter *adapter)
502 {
503 size_t sz;
504
505 BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
506 tq->comp_ring.base || tq->buf_info);
507
508 tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
509 tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc),
510 &tq->tx_ring.basePA, GFP_KERNEL);
511 if (!tq->tx_ring.base) {
512 netdev_err(adapter->netdev, "failed to allocate tx ring\n");
513 goto err;
514 }
515
516 tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
517 tq->data_ring.size * sizeof(struct Vmxnet3_TxDataDesc),
518 &tq->data_ring.basePA, GFP_KERNEL);
519 if (!tq->data_ring.base) {
520 netdev_err(adapter->netdev, "failed to allocate data ring\n");
521 goto err;
522 }
523
524 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
525 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
526 &tq->comp_ring.basePA, GFP_KERNEL);
527 if (!tq->comp_ring.base) {
528 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
529 goto err;
530 }
531
532 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]);
533 tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz,
534 &tq->buf_info_pa, GFP_KERNEL);
535 if (!tq->buf_info)
536 goto err;
537
538 return 0;
539
540 err:
541 vmxnet3_tq_destroy(tq, adapter);
542 return -ENOMEM;
543 }
544
545 static void
546 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
547 {
548 int i;
549
550 for (i = 0; i < adapter->num_tx_queues; i++)
551 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
552 }
553
554 /*
555 * starting from ring->next2fill, allocate rx buffers for the given ring
556 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
557 * are allocated or allocation fails
558 */
559
560 static int
561 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
562 int num_to_alloc, struct vmxnet3_adapter *adapter)
563 {
564 int num_allocated = 0;
565 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
566 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
567 u32 val;
568
569 while (num_allocated <= num_to_alloc) {
570 struct vmxnet3_rx_buf_info *rbi;
571 union Vmxnet3_GenericDesc *gd;
572
573 rbi = rbi_base + ring->next2fill;
574 gd = ring->base + ring->next2fill;
575
576 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
577 if (rbi->skb == NULL) {
578 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
579 rbi->len,
580 GFP_KERNEL);
581 if (unlikely(rbi->skb == NULL)) {
582 rq->stats.rx_buf_alloc_failure++;
583 break;
584 }
585
586 rbi->dma_addr = dma_map_single(
587 &adapter->pdev->dev,
588 rbi->skb->data, rbi->len,
589 PCI_DMA_FROMDEVICE);
590 } else {
591 /* rx buffer skipped by the device */
592 }
593 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
594 } else {
595 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
596 rbi->len != PAGE_SIZE);
597
598 if (rbi->page == NULL) {
599 rbi->page = alloc_page(GFP_ATOMIC);
600 if (unlikely(rbi->page == NULL)) {
601 rq->stats.rx_buf_alloc_failure++;
602 break;
603 }
604 rbi->dma_addr = dma_map_page(
605 &adapter->pdev->dev,
606 rbi->page, 0, PAGE_SIZE,
607 PCI_DMA_FROMDEVICE);
608 } else {
609 /* rx buffers skipped by the device */
610 }
611 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
612 }
613
614 BUG_ON(rbi->dma_addr == 0);
615 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
616 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
617 | val | rbi->len);
618
619 /* Fill the last buffer but dont mark it ready, or else the
620 * device will think that the queue is full */
621 if (num_allocated == num_to_alloc)
622 break;
623
624 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
625 num_allocated++;
626 vmxnet3_cmd_ring_adv_next2fill(ring);
627 }
628
629 netdev_dbg(adapter->netdev,
630 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
631 num_allocated, ring->next2fill, ring->next2comp);
632
633 /* so that the device can distinguish a full ring and an empty ring */
634 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
635
636 return num_allocated;
637 }
638
639
640 static void
641 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
642 struct vmxnet3_rx_buf_info *rbi)
643 {
644 struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
645 skb_shinfo(skb)->nr_frags;
646
647 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
648
649 __skb_frag_set_page(frag, rbi->page);
650 frag->page_offset = 0;
651 skb_frag_size_set(frag, rcd->len);
652 skb->data_len += rcd->len;
653 skb->truesize += PAGE_SIZE;
654 skb_shinfo(skb)->nr_frags++;
655 }
656
657
658 static void
659 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
660 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
661 struct vmxnet3_adapter *adapter)
662 {
663 u32 dw2, len;
664 unsigned long buf_offset;
665 int i;
666 union Vmxnet3_GenericDesc *gdesc;
667 struct vmxnet3_tx_buf_info *tbi = NULL;
668
669 BUG_ON(ctx->copy_size > skb_headlen(skb));
670
671 /* use the previous gen bit for the SOP desc */
672 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
673
674 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
675 gdesc = ctx->sop_txd; /* both loops below can be skipped */
676
677 /* no need to map the buffer if headers are copied */
678 if (ctx->copy_size) {
679 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
680 tq->tx_ring.next2fill *
681 sizeof(struct Vmxnet3_TxDataDesc));
682 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
683 ctx->sop_txd->dword[3] = 0;
684
685 tbi = tq->buf_info + tq->tx_ring.next2fill;
686 tbi->map_type = VMXNET3_MAP_NONE;
687
688 netdev_dbg(adapter->netdev,
689 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
690 tq->tx_ring.next2fill,
691 le64_to_cpu(ctx->sop_txd->txd.addr),
692 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
693 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
694
695 /* use the right gen for non-SOP desc */
696 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
697 }
698
699 /* linear part can use multiple tx desc if it's big */
700 len = skb_headlen(skb) - ctx->copy_size;
701 buf_offset = ctx->copy_size;
702 while (len) {
703 u32 buf_size;
704
705 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
706 buf_size = len;
707 dw2 |= len;
708 } else {
709 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
710 /* spec says that for TxDesc.len, 0 == 2^14 */
711 }
712
713 tbi = tq->buf_info + tq->tx_ring.next2fill;
714 tbi->map_type = VMXNET3_MAP_SINGLE;
715 tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
716 skb->data + buf_offset, buf_size,
717 PCI_DMA_TODEVICE);
718
719 tbi->len = buf_size;
720
721 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
722 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
723
724 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
725 gdesc->dword[2] = cpu_to_le32(dw2);
726 gdesc->dword[3] = 0;
727
728 netdev_dbg(adapter->netdev,
729 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
730 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
731 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
732 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
733 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
734
735 len -= buf_size;
736 buf_offset += buf_size;
737 }
738
739 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
740 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
741 u32 buf_size;
742
743 buf_offset = 0;
744 len = skb_frag_size(frag);
745 while (len) {
746 tbi = tq->buf_info + tq->tx_ring.next2fill;
747 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
748 buf_size = len;
749 dw2 |= len;
750 } else {
751 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
752 /* spec says that for TxDesc.len, 0 == 2^14 */
753 }
754 tbi->map_type = VMXNET3_MAP_PAGE;
755 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
756 buf_offset, buf_size,
757 DMA_TO_DEVICE);
758
759 tbi->len = buf_size;
760
761 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
762 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
763
764 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
765 gdesc->dword[2] = cpu_to_le32(dw2);
766 gdesc->dword[3] = 0;
767
768 netdev_dbg(adapter->netdev,
769 "txd[%u]: 0x%llx %u %u\n",
770 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
771 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
772 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
773 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
774
775 len -= buf_size;
776 buf_offset += buf_size;
777 }
778 }
779
780 ctx->eop_txd = gdesc;
781
782 /* set the last buf_info for the pkt */
783 tbi->skb = skb;
784 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
785 }
786
787
788 /* Init all tx queues */
789 static void
790 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
791 {
792 int i;
793
794 for (i = 0; i < adapter->num_tx_queues; i++)
795 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
796 }
797
798
799 /*
800 * parse and copy relevant protocol headers:
801 * For a tso pkt, relevant headers are L2/3/4 including options
802 * For a pkt requesting csum offloading, they are L2/3 and may include L4
803 * if it's a TCP/UDP pkt
804 *
805 * Returns:
806 * -1: error happens during parsing
807 * 0: protocol headers parsed, but too big to be copied
808 * 1: protocol headers parsed and copied
809 *
810 * Other effects:
811 * 1. related *ctx fields are updated.
812 * 2. ctx->copy_size is # of bytes copied
813 * 3. the portion copied is guaranteed to be in the linear part
814 *
815 */
816 static int
817 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
818 struct vmxnet3_tx_ctx *ctx,
819 struct vmxnet3_adapter *adapter)
820 {
821 struct Vmxnet3_TxDataDesc *tdd;
822 u8 protocol = 0;
823
824 if (ctx->mss) { /* TSO */
825 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
826 ctx->l4_hdr_size = tcp_hdrlen(skb);
827 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
828 } else {
829 if (skb->ip_summed == CHECKSUM_PARTIAL) {
830 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
831
832 if (ctx->ipv4) {
833 const struct iphdr *iph = ip_hdr(skb);
834
835 protocol = iph->protocol;
836 } else if (ctx->ipv6) {
837 const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
838
839 protocol = ipv6h->nexthdr;
840 }
841
842 switch (protocol) {
843 case IPPROTO_TCP:
844 ctx->l4_hdr_size = tcp_hdrlen(skb);
845 break;
846 case IPPROTO_UDP:
847 ctx->l4_hdr_size = sizeof(struct udphdr);
848 break;
849 default:
850 ctx->l4_hdr_size = 0;
851 break;
852 }
853
854 ctx->copy_size = min(ctx->eth_ip_hdr_size +
855 ctx->l4_hdr_size, skb->len);
856 } else {
857 ctx->eth_ip_hdr_size = 0;
858 ctx->l4_hdr_size = 0;
859 /* copy as much as allowed */
860 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
861 , skb_headlen(skb));
862 }
863
864 /* make sure headers are accessible directly */
865 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
866 goto err;
867 }
868
869 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
870 tq->stats.oversized_hdr++;
871 ctx->copy_size = 0;
872 return 0;
873 }
874
875 tdd = tq->data_ring.base + tq->tx_ring.next2fill;
876
877 memcpy(tdd->data, skb->data, ctx->copy_size);
878 netdev_dbg(adapter->netdev,
879 "copy %u bytes to dataRing[%u]\n",
880 ctx->copy_size, tq->tx_ring.next2fill);
881 return 1;
882
883 err:
884 return -1;
885 }
886
887
888 static void
889 vmxnet3_prepare_tso(struct sk_buff *skb,
890 struct vmxnet3_tx_ctx *ctx)
891 {
892 struct tcphdr *tcph = tcp_hdr(skb);
893
894 if (ctx->ipv4) {
895 struct iphdr *iph = ip_hdr(skb);
896
897 iph->check = 0;
898 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
899 IPPROTO_TCP, 0);
900 } else if (ctx->ipv6) {
901 struct ipv6hdr *iph = ipv6_hdr(skb);
902
903 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
904 IPPROTO_TCP, 0);
905 }
906 }
907
908 static int txd_estimate(const struct sk_buff *skb)
909 {
910 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
911 int i;
912
913 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
914 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
915
916 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
917 }
918 return count;
919 }
920
921 /*
922 * Transmits a pkt thru a given tq
923 * Returns:
924 * NETDEV_TX_OK: descriptors are setup successfully
925 * NETDEV_TX_OK: error occurred, the pkt is dropped
926 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
927 *
928 * Side-effects:
929 * 1. tx ring may be changed
930 * 2. tq stats may be updated accordingly
931 * 3. shared->txNumDeferred may be updated
932 */
933
934 static int
935 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
936 struct vmxnet3_adapter *adapter, struct net_device *netdev)
937 {
938 int ret;
939 u32 count;
940 unsigned long flags;
941 struct vmxnet3_tx_ctx ctx;
942 union Vmxnet3_GenericDesc *gdesc;
943 #ifdef __BIG_ENDIAN_BITFIELD
944 /* Use temporary descriptor to avoid touching bits multiple times */
945 union Vmxnet3_GenericDesc tempTxDesc;
946 #endif
947
948 count = txd_estimate(skb);
949
950 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
951 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
952
953 ctx.mss = skb_shinfo(skb)->gso_size;
954 if (ctx.mss) {
955 if (skb_header_cloned(skb)) {
956 if (unlikely(pskb_expand_head(skb, 0, 0,
957 GFP_ATOMIC) != 0)) {
958 tq->stats.drop_tso++;
959 goto drop_pkt;
960 }
961 tq->stats.copy_skb_header++;
962 }
963 vmxnet3_prepare_tso(skb, &ctx);
964 } else {
965 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
966
967 /* non-tso pkts must not use more than
968 * VMXNET3_MAX_TXD_PER_PKT entries
969 */
970 if (skb_linearize(skb) != 0) {
971 tq->stats.drop_too_many_frags++;
972 goto drop_pkt;
973 }
974 tq->stats.linearized++;
975
976 /* recalculate the # of descriptors to use */
977 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
978 }
979 }
980
981 spin_lock_irqsave(&tq->tx_lock, flags);
982
983 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
984 tq->stats.tx_ring_full++;
985 netdev_dbg(adapter->netdev,
986 "tx queue stopped on %s, next2comp %u"
987 " next2fill %u\n", adapter->netdev->name,
988 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
989
990 vmxnet3_tq_stop(tq, adapter);
991 spin_unlock_irqrestore(&tq->tx_lock, flags);
992 return NETDEV_TX_BUSY;
993 }
994
995
996 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
997 if (ret >= 0) {
998 BUG_ON(ret <= 0 && ctx.copy_size != 0);
999 /* hdrs parsed, check against other limits */
1000 if (ctx.mss) {
1001 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
1002 VMXNET3_MAX_TX_BUF_SIZE)) {
1003 goto hdr_too_big;
1004 }
1005 } else {
1006 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1007 if (unlikely(ctx.eth_ip_hdr_size +
1008 skb->csum_offset >
1009 VMXNET3_MAX_CSUM_OFFSET)) {
1010 goto hdr_too_big;
1011 }
1012 }
1013 }
1014 } else {
1015 tq->stats.drop_hdr_inspect_err++;
1016 goto unlock_drop_pkt;
1017 }
1018
1019 /* fill tx descs related to addr & len */
1020 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
1021
1022 /* setup the EOP desc */
1023 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1024
1025 /* setup the SOP desc */
1026 #ifdef __BIG_ENDIAN_BITFIELD
1027 gdesc = &tempTxDesc;
1028 gdesc->dword[2] = ctx.sop_txd->dword[2];
1029 gdesc->dword[3] = ctx.sop_txd->dword[3];
1030 #else
1031 gdesc = ctx.sop_txd;
1032 #endif
1033 if (ctx.mss) {
1034 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1035 gdesc->txd.om = VMXNET3_OM_TSO;
1036 gdesc->txd.msscof = ctx.mss;
1037 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1038 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1039 } else {
1040 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1041 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1042 gdesc->txd.om = VMXNET3_OM_CSUM;
1043 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1044 skb->csum_offset;
1045 } else {
1046 gdesc->txd.om = 0;
1047 gdesc->txd.msscof = 0;
1048 }
1049 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1050 }
1051
1052 if (skb_vlan_tag_present(skb)) {
1053 gdesc->txd.ti = 1;
1054 gdesc->txd.tci = skb_vlan_tag_get(skb);
1055 }
1056
1057 /* finally flips the GEN bit of the SOP desc. */
1058 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1059 VMXNET3_TXD_GEN);
1060 #ifdef __BIG_ENDIAN_BITFIELD
1061 /* Finished updating in bitfields of Tx Desc, so write them in original
1062 * place.
1063 */
1064 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1065 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1066 gdesc = ctx.sop_txd;
1067 #endif
1068 netdev_dbg(adapter->netdev,
1069 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1070 (u32)(ctx.sop_txd -
1071 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1072 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1073
1074 spin_unlock_irqrestore(&tq->tx_lock, flags);
1075
1076 if (le32_to_cpu(tq->shared->txNumDeferred) >=
1077 le32_to_cpu(tq->shared->txThreshold)) {
1078 tq->shared->txNumDeferred = 0;
1079 VMXNET3_WRITE_BAR0_REG(adapter,
1080 VMXNET3_REG_TXPROD + tq->qid * 8,
1081 tq->tx_ring.next2fill);
1082 }
1083
1084 return NETDEV_TX_OK;
1085
1086 hdr_too_big:
1087 tq->stats.drop_oversized_hdr++;
1088 unlock_drop_pkt:
1089 spin_unlock_irqrestore(&tq->tx_lock, flags);
1090 drop_pkt:
1091 tq->stats.drop_total++;
1092 dev_kfree_skb_any(skb);
1093 return NETDEV_TX_OK;
1094 }
1095
1096
1097 static netdev_tx_t
1098 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1099 {
1100 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1101
1102 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1103 return vmxnet3_tq_xmit(skb,
1104 &adapter->tx_queue[skb->queue_mapping],
1105 adapter, netdev);
1106 }
1107
1108
1109 static void
1110 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1111 struct sk_buff *skb,
1112 union Vmxnet3_GenericDesc *gdesc)
1113 {
1114 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1115 /* typical case: TCP/UDP over IP and both csums are correct */
1116 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1117 VMXNET3_RCD_CSUM_OK) {
1118 skb->ip_summed = CHECKSUM_UNNECESSARY;
1119 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1120 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6));
1121 BUG_ON(gdesc->rcd.frg);
1122 } else {
1123 if (gdesc->rcd.csum) {
1124 skb->csum = htons(gdesc->rcd.csum);
1125 skb->ip_summed = CHECKSUM_PARTIAL;
1126 } else {
1127 skb_checksum_none_assert(skb);
1128 }
1129 }
1130 } else {
1131 skb_checksum_none_assert(skb);
1132 }
1133 }
1134
1135
1136 static void
1137 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1138 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1139 {
1140 rq->stats.drop_err++;
1141 if (!rcd->fcs)
1142 rq->stats.drop_fcs++;
1143
1144 rq->stats.drop_total++;
1145
1146 /*
1147 * We do not unmap and chain the rx buffer to the skb.
1148 * We basically pretend this buffer is not used and will be recycled
1149 * by vmxnet3_rq_alloc_rx_buf()
1150 */
1151
1152 /*
1153 * ctx->skb may be NULL if this is the first and the only one
1154 * desc for the pkt
1155 */
1156 if (ctx->skb)
1157 dev_kfree_skb_irq(ctx->skb);
1158
1159 ctx->skb = NULL;
1160 }
1161
1162
1163 static int
1164 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1165 struct vmxnet3_adapter *adapter, int quota)
1166 {
1167 static const u32 rxprod_reg[2] = {
1168 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1169 };
1170 u32 num_rxd = 0;
1171 bool skip_page_frags = false;
1172 struct Vmxnet3_RxCompDesc *rcd;
1173 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1174 #ifdef __BIG_ENDIAN_BITFIELD
1175 struct Vmxnet3_RxDesc rxCmdDesc;
1176 struct Vmxnet3_RxCompDesc rxComp;
1177 #endif
1178 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1179 &rxComp);
1180 while (rcd->gen == rq->comp_ring.gen) {
1181 struct vmxnet3_rx_buf_info *rbi;
1182 struct sk_buff *skb, *new_skb = NULL;
1183 struct page *new_page = NULL;
1184 int num_to_alloc;
1185 struct Vmxnet3_RxDesc *rxd;
1186 u32 idx, ring_idx;
1187 struct vmxnet3_cmd_ring *ring = NULL;
1188 if (num_rxd >= quota) {
1189 /* we may stop even before we see the EOP desc of
1190 * the current pkt
1191 */
1192 break;
1193 }
1194 num_rxd++;
1195 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1196 idx = rcd->rxdIdx;
1197 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1198 ring = rq->rx_ring + ring_idx;
1199 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1200 &rxCmdDesc);
1201 rbi = rq->buf_info[ring_idx] + idx;
1202
1203 BUG_ON(rxd->addr != rbi->dma_addr ||
1204 rxd->len != rbi->len);
1205
1206 if (unlikely(rcd->eop && rcd->err)) {
1207 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1208 goto rcd_done;
1209 }
1210
1211 if (rcd->sop) { /* first buf of the pkt */
1212 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1213 rcd->rqID != rq->qid);
1214
1215 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1216 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1217
1218 if (unlikely(rcd->len == 0)) {
1219 /* Pretend the rx buffer is skipped. */
1220 BUG_ON(!(rcd->sop && rcd->eop));
1221 netdev_dbg(adapter->netdev,
1222 "rxRing[%u][%u] 0 length\n",
1223 ring_idx, idx);
1224 goto rcd_done;
1225 }
1226
1227 skip_page_frags = false;
1228 ctx->skb = rbi->skb;
1229 new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1230 rbi->len);
1231 if (new_skb == NULL) {
1232 /* Skb allocation failed, do not handover this
1233 * skb to stack. Reuse it. Drop the existing pkt
1234 */
1235 rq->stats.rx_buf_alloc_failure++;
1236 ctx->skb = NULL;
1237 rq->stats.drop_total++;
1238 skip_page_frags = true;
1239 goto rcd_done;
1240 }
1241
1242 dma_unmap_single(&adapter->pdev->dev, rbi->dma_addr,
1243 rbi->len,
1244 PCI_DMA_FROMDEVICE);
1245
1246 #ifdef VMXNET3_RSS
1247 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1248 (adapter->netdev->features & NETIF_F_RXHASH))
1249 skb_set_hash(ctx->skb,
1250 le32_to_cpu(rcd->rssHash),
1251 PKT_HASH_TYPE_L3);
1252 #endif
1253 skb_put(ctx->skb, rcd->len);
1254
1255 /* Immediate refill */
1256 rbi->skb = new_skb;
1257 rbi->dma_addr = dma_map_single(&adapter->pdev->dev,
1258 rbi->skb->data, rbi->len,
1259 PCI_DMA_FROMDEVICE);
1260 rxd->addr = cpu_to_le64(rbi->dma_addr);
1261 rxd->len = rbi->len;
1262
1263 } else {
1264 BUG_ON(ctx->skb == NULL && !skip_page_frags);
1265
1266 /* non SOP buffer must be type 1 in most cases */
1267 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1268 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1269
1270 /* If an sop buffer was dropped, skip all
1271 * following non-sop fragments. They will be reused.
1272 */
1273 if (skip_page_frags)
1274 goto rcd_done;
1275
1276 new_page = alloc_page(GFP_ATOMIC);
1277 if (unlikely(new_page == NULL)) {
1278 /* Replacement page frag could not be allocated.
1279 * Reuse this page. Drop the pkt and free the
1280 * skb which contained this page as a frag. Skip
1281 * processing all the following non-sop frags.
1282 */
1283 rq->stats.rx_buf_alloc_failure++;
1284 dev_kfree_skb(ctx->skb);
1285 ctx->skb = NULL;
1286 skip_page_frags = true;
1287 goto rcd_done;
1288 }
1289
1290 if (rcd->len) {
1291 dma_unmap_page(&adapter->pdev->dev,
1292 rbi->dma_addr, rbi->len,
1293 PCI_DMA_FROMDEVICE);
1294
1295 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1296 }
1297
1298 /* Immediate refill */
1299 rbi->page = new_page;
1300 rbi->dma_addr = dma_map_page(&adapter->pdev->dev,
1301 rbi->page,
1302 0, PAGE_SIZE,
1303 PCI_DMA_FROMDEVICE);
1304 rxd->addr = cpu_to_le64(rbi->dma_addr);
1305 rxd->len = rbi->len;
1306 }
1307
1308
1309 skb = ctx->skb;
1310 if (rcd->eop) {
1311 skb->len += skb->data_len;
1312
1313 vmxnet3_rx_csum(adapter, skb,
1314 (union Vmxnet3_GenericDesc *)rcd);
1315 skb->protocol = eth_type_trans(skb, adapter->netdev);
1316
1317 if (unlikely(rcd->ts))
1318 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1319
1320 if (adapter->netdev->features & NETIF_F_LRO)
1321 netif_receive_skb(skb);
1322 else
1323 napi_gro_receive(&rq->napi, skb);
1324
1325 ctx->skb = NULL;
1326 }
1327
1328 rcd_done:
1329 /* device may have skipped some rx descs */
1330 ring->next2comp = idx;
1331 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1332 ring = rq->rx_ring + ring_idx;
1333 while (num_to_alloc) {
1334 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1335 &rxCmdDesc);
1336 BUG_ON(!rxd->addr);
1337
1338 /* Recv desc is ready to be used by the device */
1339 rxd->gen = ring->gen;
1340 vmxnet3_cmd_ring_adv_next2fill(ring);
1341 num_to_alloc--;
1342 }
1343
1344 /* if needed, update the register */
1345 if (unlikely(rq->shared->updateRxProd)) {
1346 VMXNET3_WRITE_BAR0_REG(adapter,
1347 rxprod_reg[ring_idx] + rq->qid * 8,
1348 ring->next2fill);
1349 }
1350
1351 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1352 vmxnet3_getRxComp(rcd,
1353 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1354 }
1355
1356 return num_rxd;
1357 }
1358
1359
1360 static void
1361 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1362 struct vmxnet3_adapter *adapter)
1363 {
1364 u32 i, ring_idx;
1365 struct Vmxnet3_RxDesc *rxd;
1366
1367 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1368 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1369 #ifdef __BIG_ENDIAN_BITFIELD
1370 struct Vmxnet3_RxDesc rxDesc;
1371 #endif
1372 vmxnet3_getRxDesc(rxd,
1373 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1374
1375 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1376 rq->buf_info[ring_idx][i].skb) {
1377 dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1378 rxd->len, PCI_DMA_FROMDEVICE);
1379 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1380 rq->buf_info[ring_idx][i].skb = NULL;
1381 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1382 rq->buf_info[ring_idx][i].page) {
1383 dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1384 rxd->len, PCI_DMA_FROMDEVICE);
1385 put_page(rq->buf_info[ring_idx][i].page);
1386 rq->buf_info[ring_idx][i].page = NULL;
1387 }
1388 }
1389
1390 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1391 rq->rx_ring[ring_idx].next2fill =
1392 rq->rx_ring[ring_idx].next2comp = 0;
1393 }
1394
1395 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1396 rq->comp_ring.next2proc = 0;
1397 }
1398
1399
1400 static void
1401 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1402 {
1403 int i;
1404
1405 for (i = 0; i < adapter->num_rx_queues; i++)
1406 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1407 }
1408
1409
1410 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1411 struct vmxnet3_adapter *adapter)
1412 {
1413 int i;
1414 int j;
1415
1416 /* all rx buffers must have already been freed */
1417 for (i = 0; i < 2; i++) {
1418 if (rq->buf_info[i]) {
1419 for (j = 0; j < rq->rx_ring[i].size; j++)
1420 BUG_ON(rq->buf_info[i][j].page != NULL);
1421 }
1422 }
1423
1424
1425 for (i = 0; i < 2; i++) {
1426 if (rq->rx_ring[i].base) {
1427 dma_free_coherent(&adapter->pdev->dev,
1428 rq->rx_ring[i].size
1429 * sizeof(struct Vmxnet3_RxDesc),
1430 rq->rx_ring[i].base,
1431 rq->rx_ring[i].basePA);
1432 rq->rx_ring[i].base = NULL;
1433 }
1434 rq->buf_info[i] = NULL;
1435 }
1436
1437 if (rq->comp_ring.base) {
1438 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
1439 * sizeof(struct Vmxnet3_RxCompDesc),
1440 rq->comp_ring.base, rq->comp_ring.basePA);
1441 rq->comp_ring.base = NULL;
1442 }
1443
1444 if (rq->buf_info[0]) {
1445 size_t sz = sizeof(struct vmxnet3_rx_buf_info) *
1446 (rq->rx_ring[0].size + rq->rx_ring[1].size);
1447 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
1448 rq->buf_info_pa);
1449 }
1450 }
1451
1452
1453 static int
1454 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1455 struct vmxnet3_adapter *adapter)
1456 {
1457 int i;
1458
1459 /* initialize buf_info */
1460 for (i = 0; i < rq->rx_ring[0].size; i++) {
1461
1462 /* 1st buf for a pkt is skbuff */
1463 if (i % adapter->rx_buf_per_pkt == 0) {
1464 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1465 rq->buf_info[0][i].len = adapter->skb_buf_size;
1466 } else { /* subsequent bufs for a pkt is frag */
1467 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1468 rq->buf_info[0][i].len = PAGE_SIZE;
1469 }
1470 }
1471 for (i = 0; i < rq->rx_ring[1].size; i++) {
1472 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1473 rq->buf_info[1][i].len = PAGE_SIZE;
1474 }
1475
1476 /* reset internal state and allocate buffers for both rings */
1477 for (i = 0; i < 2; i++) {
1478 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1479
1480 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1481 sizeof(struct Vmxnet3_RxDesc));
1482 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1483 }
1484 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1485 adapter) == 0) {
1486 /* at least has 1 rx buffer for the 1st ring */
1487 return -ENOMEM;
1488 }
1489 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1490
1491 /* reset the comp ring */
1492 rq->comp_ring.next2proc = 0;
1493 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1494 sizeof(struct Vmxnet3_RxCompDesc));
1495 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1496
1497 /* reset rxctx */
1498 rq->rx_ctx.skb = NULL;
1499
1500 /* stats are not reset */
1501 return 0;
1502 }
1503
1504
1505 static int
1506 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1507 {
1508 int i, err = 0;
1509
1510 for (i = 0; i < adapter->num_rx_queues; i++) {
1511 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1512 if (unlikely(err)) {
1513 dev_err(&adapter->netdev->dev, "%s: failed to "
1514 "initialize rx queue%i\n",
1515 adapter->netdev->name, i);
1516 break;
1517 }
1518 }
1519 return err;
1520
1521 }
1522
1523
1524 static int
1525 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1526 {
1527 int i;
1528 size_t sz;
1529 struct vmxnet3_rx_buf_info *bi;
1530
1531 for (i = 0; i < 2; i++) {
1532
1533 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1534 rq->rx_ring[i].base = dma_alloc_coherent(
1535 &adapter->pdev->dev, sz,
1536 &rq->rx_ring[i].basePA,
1537 GFP_KERNEL);
1538 if (!rq->rx_ring[i].base) {
1539 netdev_err(adapter->netdev,
1540 "failed to allocate rx ring %d\n", i);
1541 goto err;
1542 }
1543 }
1544
1545 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1546 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
1547 &rq->comp_ring.basePA,
1548 GFP_KERNEL);
1549 if (!rq->comp_ring.base) {
1550 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
1551 goto err;
1552 }
1553
1554 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1555 rq->rx_ring[1].size);
1556 bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa,
1557 GFP_KERNEL);
1558 if (!bi)
1559 goto err;
1560
1561 rq->buf_info[0] = bi;
1562 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1563
1564 return 0;
1565
1566 err:
1567 vmxnet3_rq_destroy(rq, adapter);
1568 return -ENOMEM;
1569 }
1570
1571
1572 static int
1573 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1574 {
1575 int i, err = 0;
1576
1577 for (i = 0; i < adapter->num_rx_queues; i++) {
1578 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1579 if (unlikely(err)) {
1580 dev_err(&adapter->netdev->dev,
1581 "%s: failed to create rx queue%i\n",
1582 adapter->netdev->name, i);
1583 goto err_out;
1584 }
1585 }
1586 return err;
1587 err_out:
1588 vmxnet3_rq_destroy_all(adapter);
1589 return err;
1590
1591 }
1592
1593 /* Multiple queue aware polling function for tx and rx */
1594
1595 static int
1596 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1597 {
1598 int rcd_done = 0, i;
1599 if (unlikely(adapter->shared->ecr))
1600 vmxnet3_process_events(adapter);
1601 for (i = 0; i < adapter->num_tx_queues; i++)
1602 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1603
1604 for (i = 0; i < adapter->num_rx_queues; i++)
1605 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1606 adapter, budget);
1607 return rcd_done;
1608 }
1609
1610
1611 static int
1612 vmxnet3_poll(struct napi_struct *napi, int budget)
1613 {
1614 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1615 struct vmxnet3_rx_queue, napi);
1616 int rxd_done;
1617
1618 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1619
1620 if (rxd_done < budget) {
1621 napi_complete(napi);
1622 vmxnet3_enable_all_intrs(rx_queue->adapter);
1623 }
1624 return rxd_done;
1625 }
1626
1627 /*
1628 * NAPI polling function for MSI-X mode with multiple Rx queues
1629 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1630 */
1631
1632 static int
1633 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1634 {
1635 struct vmxnet3_rx_queue *rq = container_of(napi,
1636 struct vmxnet3_rx_queue, napi);
1637 struct vmxnet3_adapter *adapter = rq->adapter;
1638 int rxd_done;
1639
1640 /* When sharing interrupt with corresponding tx queue, process
1641 * tx completions in that queue as well
1642 */
1643 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1644 struct vmxnet3_tx_queue *tq =
1645 &adapter->tx_queue[rq - adapter->rx_queue];
1646 vmxnet3_tq_tx_complete(tq, adapter);
1647 }
1648
1649 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1650
1651 if (rxd_done < budget) {
1652 napi_complete(napi);
1653 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1654 }
1655 return rxd_done;
1656 }
1657
1658
1659 #ifdef CONFIG_PCI_MSI
1660
1661 /*
1662 * Handle completion interrupts on tx queues
1663 * Returns whether or not the intr is handled
1664 */
1665
1666 static irqreturn_t
1667 vmxnet3_msix_tx(int irq, void *data)
1668 {
1669 struct vmxnet3_tx_queue *tq = data;
1670 struct vmxnet3_adapter *adapter = tq->adapter;
1671
1672 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1673 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1674
1675 /* Handle the case where only one irq is allocate for all tx queues */
1676 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1677 int i;
1678 for (i = 0; i < adapter->num_tx_queues; i++) {
1679 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1680 vmxnet3_tq_tx_complete(txq, adapter);
1681 }
1682 } else {
1683 vmxnet3_tq_tx_complete(tq, adapter);
1684 }
1685 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1686
1687 return IRQ_HANDLED;
1688 }
1689
1690
1691 /*
1692 * Handle completion interrupts on rx queues. Returns whether or not the
1693 * intr is handled
1694 */
1695
1696 static irqreturn_t
1697 vmxnet3_msix_rx(int irq, void *data)
1698 {
1699 struct vmxnet3_rx_queue *rq = data;
1700 struct vmxnet3_adapter *adapter = rq->adapter;
1701
1702 /* disable intr if needed */
1703 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1704 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1705 napi_schedule(&rq->napi);
1706
1707 return IRQ_HANDLED;
1708 }
1709
1710 /*
1711 *----------------------------------------------------------------------------
1712 *
1713 * vmxnet3_msix_event --
1714 *
1715 * vmxnet3 msix event intr handler
1716 *
1717 * Result:
1718 * whether or not the intr is handled
1719 *
1720 *----------------------------------------------------------------------------
1721 */
1722
1723 static irqreturn_t
1724 vmxnet3_msix_event(int irq, void *data)
1725 {
1726 struct net_device *dev = data;
1727 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1728
1729 /* disable intr if needed */
1730 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1731 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1732
1733 if (adapter->shared->ecr)
1734 vmxnet3_process_events(adapter);
1735
1736 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1737
1738 return IRQ_HANDLED;
1739 }
1740
1741 #endif /* CONFIG_PCI_MSI */
1742
1743
1744 /* Interrupt handler for vmxnet3 */
1745 static irqreturn_t
1746 vmxnet3_intr(int irq, void *dev_id)
1747 {
1748 struct net_device *dev = dev_id;
1749 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1750
1751 if (adapter->intr.type == VMXNET3_IT_INTX) {
1752 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1753 if (unlikely(icr == 0))
1754 /* not ours */
1755 return IRQ_NONE;
1756 }
1757
1758
1759 /* disable intr if needed */
1760 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1761 vmxnet3_disable_all_intrs(adapter);
1762
1763 napi_schedule(&adapter->rx_queue[0].napi);
1764
1765 return IRQ_HANDLED;
1766 }
1767
1768 #ifdef CONFIG_NET_POLL_CONTROLLER
1769
1770 /* netpoll callback. */
1771 static void
1772 vmxnet3_netpoll(struct net_device *netdev)
1773 {
1774 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1775
1776 switch (adapter->intr.type) {
1777 #ifdef CONFIG_PCI_MSI
1778 case VMXNET3_IT_MSIX: {
1779 int i;
1780 for (i = 0; i < adapter->num_rx_queues; i++)
1781 vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
1782 break;
1783 }
1784 #endif
1785 case VMXNET3_IT_MSI:
1786 default:
1787 vmxnet3_intr(0, adapter->netdev);
1788 break;
1789 }
1790
1791 }
1792 #endif /* CONFIG_NET_POLL_CONTROLLER */
1793
1794 static int
1795 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1796 {
1797 struct vmxnet3_intr *intr = &adapter->intr;
1798 int err = 0, i;
1799 int vector = 0;
1800
1801 #ifdef CONFIG_PCI_MSI
1802 if (adapter->intr.type == VMXNET3_IT_MSIX) {
1803 for (i = 0; i < adapter->num_tx_queues; i++) {
1804 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1805 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1806 adapter->netdev->name, vector);
1807 err = request_irq(
1808 intr->msix_entries[vector].vector,
1809 vmxnet3_msix_tx, 0,
1810 adapter->tx_queue[i].name,
1811 &adapter->tx_queue[i]);
1812 } else {
1813 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1814 adapter->netdev->name, vector);
1815 }
1816 if (err) {
1817 dev_err(&adapter->netdev->dev,
1818 "Failed to request irq for MSIX, %s, "
1819 "error %d\n",
1820 adapter->tx_queue[i].name, err);
1821 return err;
1822 }
1823
1824 /* Handle the case where only 1 MSIx was allocated for
1825 * all tx queues */
1826 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1827 for (; i < adapter->num_tx_queues; i++)
1828 adapter->tx_queue[i].comp_ring.intr_idx
1829 = vector;
1830 vector++;
1831 break;
1832 } else {
1833 adapter->tx_queue[i].comp_ring.intr_idx
1834 = vector++;
1835 }
1836 }
1837 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1838 vector = 0;
1839
1840 for (i = 0; i < adapter->num_rx_queues; i++) {
1841 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1842 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1843 adapter->netdev->name, vector);
1844 else
1845 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1846 adapter->netdev->name, vector);
1847 err = request_irq(intr->msix_entries[vector].vector,
1848 vmxnet3_msix_rx, 0,
1849 adapter->rx_queue[i].name,
1850 &(adapter->rx_queue[i]));
1851 if (err) {
1852 netdev_err(adapter->netdev,
1853 "Failed to request irq for MSIX, "
1854 "%s, error %d\n",
1855 adapter->rx_queue[i].name, err);
1856 return err;
1857 }
1858
1859 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1860 }
1861
1862 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1863 adapter->netdev->name, vector);
1864 err = request_irq(intr->msix_entries[vector].vector,
1865 vmxnet3_msix_event, 0,
1866 intr->event_msi_vector_name, adapter->netdev);
1867 intr->event_intr_idx = vector;
1868
1869 } else if (intr->type == VMXNET3_IT_MSI) {
1870 adapter->num_rx_queues = 1;
1871 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1872 adapter->netdev->name, adapter->netdev);
1873 } else {
1874 #endif
1875 adapter->num_rx_queues = 1;
1876 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1877 IRQF_SHARED, adapter->netdev->name,
1878 adapter->netdev);
1879 #ifdef CONFIG_PCI_MSI
1880 }
1881 #endif
1882 intr->num_intrs = vector + 1;
1883 if (err) {
1884 netdev_err(adapter->netdev,
1885 "Failed to request irq (intr type:%d), error %d\n",
1886 intr->type, err);
1887 } else {
1888 /* Number of rx queues will not change after this */
1889 for (i = 0; i < adapter->num_rx_queues; i++) {
1890 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1891 rq->qid = i;
1892 rq->qid2 = i + adapter->num_rx_queues;
1893 }
1894
1895
1896
1897 /* init our intr settings */
1898 for (i = 0; i < intr->num_intrs; i++)
1899 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1900 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1901 adapter->intr.event_intr_idx = 0;
1902 for (i = 0; i < adapter->num_tx_queues; i++)
1903 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1904 adapter->rx_queue[0].comp_ring.intr_idx = 0;
1905 }
1906
1907 netdev_info(adapter->netdev,
1908 "intr type %u, mode %u, %u vectors allocated\n",
1909 intr->type, intr->mask_mode, intr->num_intrs);
1910 }
1911
1912 return err;
1913 }
1914
1915
1916 static void
1917 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1918 {
1919 struct vmxnet3_intr *intr = &adapter->intr;
1920 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1921
1922 switch (intr->type) {
1923 #ifdef CONFIG_PCI_MSI
1924 case VMXNET3_IT_MSIX:
1925 {
1926 int i, vector = 0;
1927
1928 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1929 for (i = 0; i < adapter->num_tx_queues; i++) {
1930 free_irq(intr->msix_entries[vector++].vector,
1931 &(adapter->tx_queue[i]));
1932 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1933 break;
1934 }
1935 }
1936
1937 for (i = 0; i < adapter->num_rx_queues; i++) {
1938 free_irq(intr->msix_entries[vector++].vector,
1939 &(adapter->rx_queue[i]));
1940 }
1941
1942 free_irq(intr->msix_entries[vector].vector,
1943 adapter->netdev);
1944 BUG_ON(vector >= intr->num_intrs);
1945 break;
1946 }
1947 #endif
1948 case VMXNET3_IT_MSI:
1949 free_irq(adapter->pdev->irq, adapter->netdev);
1950 break;
1951 case VMXNET3_IT_INTX:
1952 free_irq(adapter->pdev->irq, adapter->netdev);
1953 break;
1954 default:
1955 BUG();
1956 }
1957 }
1958
1959
1960 static void
1961 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1962 {
1963 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1964 u16 vid;
1965
1966 /* allow untagged pkts */
1967 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1968
1969 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1970 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1971 }
1972
1973
1974 static int
1975 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1976 {
1977 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1978
1979 if (!(netdev->flags & IFF_PROMISC)) {
1980 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1981 unsigned long flags;
1982
1983 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1984 spin_lock_irqsave(&adapter->cmd_lock, flags);
1985 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1986 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1987 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1988 }
1989
1990 set_bit(vid, adapter->active_vlans);
1991
1992 return 0;
1993 }
1994
1995
1996 static int
1997 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1998 {
1999 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2000
2001 if (!(netdev->flags & IFF_PROMISC)) {
2002 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2003 unsigned long flags;
2004
2005 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2006 spin_lock_irqsave(&adapter->cmd_lock, flags);
2007 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2008 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2009 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2010 }
2011
2012 clear_bit(vid, adapter->active_vlans);
2013
2014 return 0;
2015 }
2016
2017
2018 static u8 *
2019 vmxnet3_copy_mc(struct net_device *netdev)
2020 {
2021 u8 *buf = NULL;
2022 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2023
2024 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2025 if (sz <= 0xffff) {
2026 /* We may be called with BH disabled */
2027 buf = kmalloc(sz, GFP_ATOMIC);
2028 if (buf) {
2029 struct netdev_hw_addr *ha;
2030 int i = 0;
2031
2032 netdev_for_each_mc_addr(ha, netdev)
2033 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2034 ETH_ALEN);
2035 }
2036 }
2037 return buf;
2038 }
2039
2040
2041 static void
2042 vmxnet3_set_mc(struct net_device *netdev)
2043 {
2044 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2045 unsigned long flags;
2046 struct Vmxnet3_RxFilterConf *rxConf =
2047 &adapter->shared->devRead.rxFilterConf;
2048 u8 *new_table = NULL;
2049 dma_addr_t new_table_pa = 0;
2050 u32 new_mode = VMXNET3_RXM_UCAST;
2051
2052 if (netdev->flags & IFF_PROMISC) {
2053 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2054 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2055
2056 new_mode |= VMXNET3_RXM_PROMISC;
2057 } else {
2058 vmxnet3_restore_vlan(adapter);
2059 }
2060
2061 if (netdev->flags & IFF_BROADCAST)
2062 new_mode |= VMXNET3_RXM_BCAST;
2063
2064 if (netdev->flags & IFF_ALLMULTI)
2065 new_mode |= VMXNET3_RXM_ALL_MULTI;
2066 else
2067 if (!netdev_mc_empty(netdev)) {
2068 new_table = vmxnet3_copy_mc(netdev);
2069 if (new_table) {
2070 rxConf->mfTableLen = cpu_to_le16(
2071 netdev_mc_count(netdev) * ETH_ALEN);
2072 new_table_pa = dma_map_single(
2073 &adapter->pdev->dev,
2074 new_table,
2075 rxConf->mfTableLen,
2076 PCI_DMA_TODEVICE);
2077 }
2078
2079 if (new_table_pa) {
2080 new_mode |= VMXNET3_RXM_MCAST;
2081 rxConf->mfTablePA = cpu_to_le64(new_table_pa);
2082 } else {
2083 netdev_info(netdev,
2084 "failed to copy mcast list, setting ALL_MULTI\n");
2085 new_mode |= VMXNET3_RXM_ALL_MULTI;
2086 }
2087 }
2088
2089 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2090 rxConf->mfTableLen = 0;
2091 rxConf->mfTablePA = 0;
2092 }
2093
2094 spin_lock_irqsave(&adapter->cmd_lock, flags);
2095 if (new_mode != rxConf->rxMode) {
2096 rxConf->rxMode = cpu_to_le32(new_mode);
2097 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2098 VMXNET3_CMD_UPDATE_RX_MODE);
2099 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2100 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2101 }
2102
2103 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2104 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2105 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2106
2107 if (new_table_pa)
2108 dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2109 rxConf->mfTableLen, PCI_DMA_TODEVICE);
2110 kfree(new_table);
2111 }
2112
2113 void
2114 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2115 {
2116 int i;
2117
2118 for (i = 0; i < adapter->num_rx_queues; i++)
2119 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2120 }
2121
2122
2123 /*
2124 * Set up driver_shared based on settings in adapter.
2125 */
2126
2127 static void
2128 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2129 {
2130 struct Vmxnet3_DriverShared *shared = adapter->shared;
2131 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2132 struct Vmxnet3_TxQueueConf *tqc;
2133 struct Vmxnet3_RxQueueConf *rqc;
2134 int i;
2135
2136 memset(shared, 0, sizeof(*shared));
2137
2138 /* driver settings */
2139 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2140 devRead->misc.driverInfo.version = cpu_to_le32(
2141 VMXNET3_DRIVER_VERSION_NUM);
2142 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2143 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2144 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2145 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2146 *((u32 *)&devRead->misc.driverInfo.gos));
2147 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2148 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2149
2150 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2151 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2152
2153 /* set up feature flags */
2154 if (adapter->netdev->features & NETIF_F_RXCSUM)
2155 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2156
2157 if (adapter->netdev->features & NETIF_F_LRO) {
2158 devRead->misc.uptFeatures |= UPT1_F_LRO;
2159 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2160 }
2161 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2162 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2163
2164 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2165 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2166 devRead->misc.queueDescLen = cpu_to_le32(
2167 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2168 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2169
2170 /* tx queue settings */
2171 devRead->misc.numTxQueues = adapter->num_tx_queues;
2172 for (i = 0; i < adapter->num_tx_queues; i++) {
2173 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2174 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2175 tqc = &adapter->tqd_start[i].conf;
2176 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2177 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2178 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2179 tqc->ddPA = cpu_to_le64(tq->buf_info_pa);
2180 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2181 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2182 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2183 tqc->ddLen = cpu_to_le32(
2184 sizeof(struct vmxnet3_tx_buf_info) *
2185 tqc->txRingSize);
2186 tqc->intrIdx = tq->comp_ring.intr_idx;
2187 }
2188
2189 /* rx queue settings */
2190 devRead->misc.numRxQueues = adapter->num_rx_queues;
2191 for (i = 0; i < adapter->num_rx_queues; i++) {
2192 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2193 rqc = &adapter->rqd_start[i].conf;
2194 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2195 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2196 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2197 rqc->ddPA = cpu_to_le64(rq->buf_info_pa);
2198 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2199 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2200 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2201 rqc->ddLen = cpu_to_le32(
2202 sizeof(struct vmxnet3_rx_buf_info) *
2203 (rqc->rxRingSize[0] +
2204 rqc->rxRingSize[1]));
2205 rqc->intrIdx = rq->comp_ring.intr_idx;
2206 }
2207
2208 #ifdef VMXNET3_RSS
2209 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2210
2211 if (adapter->rss) {
2212 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2213
2214 devRead->misc.uptFeatures |= UPT1_F_RSS;
2215 devRead->misc.numRxQueues = adapter->num_rx_queues;
2216 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2217 UPT1_RSS_HASH_TYPE_IPV4 |
2218 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2219 UPT1_RSS_HASH_TYPE_IPV6;
2220 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2221 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2222 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2223 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2224
2225 for (i = 0; i < rssConf->indTableSize; i++)
2226 rssConf->indTable[i] = ethtool_rxfh_indir_default(
2227 i, adapter->num_rx_queues);
2228
2229 devRead->rssConfDesc.confVer = 1;
2230 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2231 devRead->rssConfDesc.confPA =
2232 cpu_to_le64(adapter->rss_conf_pa);
2233 }
2234
2235 #endif /* VMXNET3_RSS */
2236
2237 /* intr settings */
2238 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2239 VMXNET3_IMM_AUTO;
2240 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2241 for (i = 0; i < adapter->intr.num_intrs; i++)
2242 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2243
2244 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2245 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2246
2247 /* rx filter settings */
2248 devRead->rxFilterConf.rxMode = 0;
2249 vmxnet3_restore_vlan(adapter);
2250 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2251
2252 /* the rest are already zeroed */
2253 }
2254
2255
2256 int
2257 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2258 {
2259 int err, i;
2260 u32 ret;
2261 unsigned long flags;
2262
2263 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2264 " ring sizes %u %u %u\n", adapter->netdev->name,
2265 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2266 adapter->tx_queue[0].tx_ring.size,
2267 adapter->rx_queue[0].rx_ring[0].size,
2268 adapter->rx_queue[0].rx_ring[1].size);
2269
2270 vmxnet3_tq_init_all(adapter);
2271 err = vmxnet3_rq_init_all(adapter);
2272 if (err) {
2273 netdev_err(adapter->netdev,
2274 "Failed to init rx queue error %d\n", err);
2275 goto rq_err;
2276 }
2277
2278 err = vmxnet3_request_irqs(adapter);
2279 if (err) {
2280 netdev_err(adapter->netdev,
2281 "Failed to setup irq for error %d\n", err);
2282 goto irq_err;
2283 }
2284
2285 vmxnet3_setup_driver_shared(adapter);
2286
2287 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2288 adapter->shared_pa));
2289 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2290 adapter->shared_pa));
2291 spin_lock_irqsave(&adapter->cmd_lock, flags);
2292 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2293 VMXNET3_CMD_ACTIVATE_DEV);
2294 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2295 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2296
2297 if (ret != 0) {
2298 netdev_err(adapter->netdev,
2299 "Failed to activate dev: error %u\n", ret);
2300 err = -EINVAL;
2301 goto activate_err;
2302 }
2303
2304 for (i = 0; i < adapter->num_rx_queues; i++) {
2305 VMXNET3_WRITE_BAR0_REG(adapter,
2306 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2307 adapter->rx_queue[i].rx_ring[0].next2fill);
2308 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2309 (i * VMXNET3_REG_ALIGN)),
2310 adapter->rx_queue[i].rx_ring[1].next2fill);
2311 }
2312
2313 /* Apply the rx filter settins last. */
2314 vmxnet3_set_mc(adapter->netdev);
2315
2316 /*
2317 * Check link state when first activating device. It will start the
2318 * tx queue if the link is up.
2319 */
2320 vmxnet3_check_link(adapter, true);
2321 for (i = 0; i < adapter->num_rx_queues; i++)
2322 napi_enable(&adapter->rx_queue[i].napi);
2323 vmxnet3_enable_all_intrs(adapter);
2324 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2325 return 0;
2326
2327 activate_err:
2328 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2329 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2330 vmxnet3_free_irqs(adapter);
2331 irq_err:
2332 rq_err:
2333 /* free up buffers we allocated */
2334 vmxnet3_rq_cleanup_all(adapter);
2335 return err;
2336 }
2337
2338
2339 void
2340 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2341 {
2342 unsigned long flags;
2343 spin_lock_irqsave(&adapter->cmd_lock, flags);
2344 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2345 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2346 }
2347
2348
2349 int
2350 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2351 {
2352 int i;
2353 unsigned long flags;
2354 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2355 return 0;
2356
2357
2358 spin_lock_irqsave(&adapter->cmd_lock, flags);
2359 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2360 VMXNET3_CMD_QUIESCE_DEV);
2361 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2362 vmxnet3_disable_all_intrs(adapter);
2363
2364 for (i = 0; i < adapter->num_rx_queues; i++)
2365 napi_disable(&adapter->rx_queue[i].napi);
2366 netif_tx_disable(adapter->netdev);
2367 adapter->link_speed = 0;
2368 netif_carrier_off(adapter->netdev);
2369
2370 vmxnet3_tq_cleanup_all(adapter);
2371 vmxnet3_rq_cleanup_all(adapter);
2372 vmxnet3_free_irqs(adapter);
2373 return 0;
2374 }
2375
2376
2377 static void
2378 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2379 {
2380 u32 tmp;
2381
2382 tmp = *(u32 *)mac;
2383 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2384
2385 tmp = (mac[5] << 8) | mac[4];
2386 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2387 }
2388
2389
2390 static int
2391 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2392 {
2393 struct sockaddr *addr = p;
2394 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2395
2396 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2397 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2398
2399 return 0;
2400 }
2401
2402
2403 /* ==================== initialization and cleanup routines ============ */
2404
2405 static int
2406 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2407 {
2408 int err;
2409 unsigned long mmio_start, mmio_len;
2410 struct pci_dev *pdev = adapter->pdev;
2411
2412 err = pci_enable_device(pdev);
2413 if (err) {
2414 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
2415 return err;
2416 }
2417
2418 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2419 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2420 dev_err(&pdev->dev,
2421 "pci_set_consistent_dma_mask failed\n");
2422 err = -EIO;
2423 goto err_set_mask;
2424 }
2425 *dma64 = true;
2426 } else {
2427 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2428 dev_err(&pdev->dev,
2429 "pci_set_dma_mask failed\n");
2430 err = -EIO;
2431 goto err_set_mask;
2432 }
2433 *dma64 = false;
2434 }
2435
2436 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2437 vmxnet3_driver_name);
2438 if (err) {
2439 dev_err(&pdev->dev,
2440 "Failed to request region for adapter: error %d\n", err);
2441 goto err_set_mask;
2442 }
2443
2444 pci_set_master(pdev);
2445
2446 mmio_start = pci_resource_start(pdev, 0);
2447 mmio_len = pci_resource_len(pdev, 0);
2448 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2449 if (!adapter->hw_addr0) {
2450 dev_err(&pdev->dev, "Failed to map bar0\n");
2451 err = -EIO;
2452 goto err_ioremap;
2453 }
2454
2455 mmio_start = pci_resource_start(pdev, 1);
2456 mmio_len = pci_resource_len(pdev, 1);
2457 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2458 if (!adapter->hw_addr1) {
2459 dev_err(&pdev->dev, "Failed to map bar1\n");
2460 err = -EIO;
2461 goto err_bar1;
2462 }
2463 return 0;
2464
2465 err_bar1:
2466 iounmap(adapter->hw_addr0);
2467 err_ioremap:
2468 pci_release_selected_regions(pdev, (1 << 2) - 1);
2469 err_set_mask:
2470 pci_disable_device(pdev);
2471 return err;
2472 }
2473
2474
2475 static void
2476 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2477 {
2478 BUG_ON(!adapter->pdev);
2479
2480 iounmap(adapter->hw_addr0);
2481 iounmap(adapter->hw_addr1);
2482 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2483 pci_disable_device(adapter->pdev);
2484 }
2485
2486
2487 static void
2488 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2489 {
2490 size_t sz, i, ring0_size, ring1_size, comp_size;
2491 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2492
2493
2494 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2495 VMXNET3_MAX_ETH_HDR_SIZE) {
2496 adapter->skb_buf_size = adapter->netdev->mtu +
2497 VMXNET3_MAX_ETH_HDR_SIZE;
2498 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2499 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2500
2501 adapter->rx_buf_per_pkt = 1;
2502 } else {
2503 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2504 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2505 VMXNET3_MAX_ETH_HDR_SIZE;
2506 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2507 }
2508
2509 /*
2510 * for simplicity, force the ring0 size to be a multiple of
2511 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2512 */
2513 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2514 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2515 ring0_size = (ring0_size + sz - 1) / sz * sz;
2516 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2517 sz * sz);
2518 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2519 ring1_size = (ring1_size + sz - 1) / sz * sz;
2520 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
2521 sz * sz);
2522 comp_size = ring0_size + ring1_size;
2523
2524 for (i = 0; i < adapter->num_rx_queues; i++) {
2525 rq = &adapter->rx_queue[i];
2526 rq->rx_ring[0].size = ring0_size;
2527 rq->rx_ring[1].size = ring1_size;
2528 rq->comp_ring.size = comp_size;
2529 }
2530 }
2531
2532
2533 int
2534 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2535 u32 rx_ring_size, u32 rx_ring2_size)
2536 {
2537 int err = 0, i;
2538
2539 for (i = 0; i < adapter->num_tx_queues; i++) {
2540 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2541 tq->tx_ring.size = tx_ring_size;
2542 tq->data_ring.size = tx_ring_size;
2543 tq->comp_ring.size = tx_ring_size;
2544 tq->shared = &adapter->tqd_start[i].ctrl;
2545 tq->stopped = true;
2546 tq->adapter = adapter;
2547 tq->qid = i;
2548 err = vmxnet3_tq_create(tq, adapter);
2549 /*
2550 * Too late to change num_tx_queues. We cannot do away with
2551 * lesser number of queues than what we asked for
2552 */
2553 if (err)
2554 goto queue_err;
2555 }
2556
2557 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2558 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2559 vmxnet3_adjust_rx_ring_size(adapter);
2560 for (i = 0; i < adapter->num_rx_queues; i++) {
2561 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2562 /* qid and qid2 for rx queues will be assigned later when num
2563 * of rx queues is finalized after allocating intrs */
2564 rq->shared = &adapter->rqd_start[i].ctrl;
2565 rq->adapter = adapter;
2566 err = vmxnet3_rq_create(rq, adapter);
2567 if (err) {
2568 if (i == 0) {
2569 netdev_err(adapter->netdev,
2570 "Could not allocate any rx queues. "
2571 "Aborting.\n");
2572 goto queue_err;
2573 } else {
2574 netdev_info(adapter->netdev,
2575 "Number of rx queues changed "
2576 "to : %d.\n", i);
2577 adapter->num_rx_queues = i;
2578 err = 0;
2579 break;
2580 }
2581 }
2582 }
2583 return err;
2584 queue_err:
2585 vmxnet3_tq_destroy_all(adapter);
2586 return err;
2587 }
2588
2589 static int
2590 vmxnet3_open(struct net_device *netdev)
2591 {
2592 struct vmxnet3_adapter *adapter;
2593 int err, i;
2594
2595 adapter = netdev_priv(netdev);
2596
2597 for (i = 0; i < adapter->num_tx_queues; i++)
2598 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2599
2600 err = vmxnet3_create_queues(adapter, adapter->tx_ring_size,
2601 adapter->rx_ring_size,
2602 adapter->rx_ring2_size);
2603 if (err)
2604 goto queue_err;
2605
2606 err = vmxnet3_activate_dev(adapter);
2607 if (err)
2608 goto activate_err;
2609
2610 return 0;
2611
2612 activate_err:
2613 vmxnet3_rq_destroy_all(adapter);
2614 vmxnet3_tq_destroy_all(adapter);
2615 queue_err:
2616 return err;
2617 }
2618
2619
2620 static int
2621 vmxnet3_close(struct net_device *netdev)
2622 {
2623 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2624
2625 /*
2626 * Reset_work may be in the middle of resetting the device, wait for its
2627 * completion.
2628 */
2629 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2630 msleep(1);
2631
2632 vmxnet3_quiesce_dev(adapter);
2633
2634 vmxnet3_rq_destroy_all(adapter);
2635 vmxnet3_tq_destroy_all(adapter);
2636
2637 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2638
2639
2640 return 0;
2641 }
2642
2643
2644 void
2645 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2646 {
2647 int i;
2648
2649 /*
2650 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2651 * vmxnet3_close() will deadlock.
2652 */
2653 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2654
2655 /* we need to enable NAPI, otherwise dev_close will deadlock */
2656 for (i = 0; i < adapter->num_rx_queues; i++)
2657 napi_enable(&adapter->rx_queue[i].napi);
2658 dev_close(adapter->netdev);
2659 }
2660
2661
2662 static int
2663 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2664 {
2665 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2666 int err = 0;
2667
2668 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2669 return -EINVAL;
2670
2671 netdev->mtu = new_mtu;
2672
2673 /*
2674 * Reset_work may be in the middle of resetting the device, wait for its
2675 * completion.
2676 */
2677 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2678 msleep(1);
2679
2680 if (netif_running(netdev)) {
2681 vmxnet3_quiesce_dev(adapter);
2682 vmxnet3_reset_dev(adapter);
2683
2684 /* we need to re-create the rx queue based on the new mtu */
2685 vmxnet3_rq_destroy_all(adapter);
2686 vmxnet3_adjust_rx_ring_size(adapter);
2687 err = vmxnet3_rq_create_all(adapter);
2688 if (err) {
2689 netdev_err(netdev,
2690 "failed to re-create rx queues, "
2691 " error %d. Closing it.\n", err);
2692 goto out;
2693 }
2694
2695 err = vmxnet3_activate_dev(adapter);
2696 if (err) {
2697 netdev_err(netdev,
2698 "failed to re-activate, error %d. "
2699 "Closing it\n", err);
2700 goto out;
2701 }
2702 }
2703
2704 out:
2705 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2706 if (err)
2707 vmxnet3_force_close(adapter);
2708
2709 return err;
2710 }
2711
2712
2713 static void
2714 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2715 {
2716 struct net_device *netdev = adapter->netdev;
2717
2718 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
2719 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
2720 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
2721 NETIF_F_LRO;
2722 if (dma64)
2723 netdev->hw_features |= NETIF_F_HIGHDMA;
2724 netdev->vlan_features = netdev->hw_features &
2725 ~(NETIF_F_HW_VLAN_CTAG_TX |
2726 NETIF_F_HW_VLAN_CTAG_RX);
2727 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
2728 }
2729
2730
2731 static void
2732 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2733 {
2734 u32 tmp;
2735
2736 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2737 *(u32 *)mac = tmp;
2738
2739 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2740 mac[4] = tmp & 0xff;
2741 mac[5] = (tmp >> 8) & 0xff;
2742 }
2743
2744 #ifdef CONFIG_PCI_MSI
2745
2746 /*
2747 * Enable MSIx vectors.
2748 * Returns :
2749 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
2750 * were enabled.
2751 * number of vectors which were enabled otherwise (this number is greater
2752 * than VMXNET3_LINUX_MIN_MSIX_VECT)
2753 */
2754
2755 static int
2756 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
2757 {
2758 int ret = pci_enable_msix_range(adapter->pdev,
2759 adapter->intr.msix_entries, nvec, nvec);
2760
2761 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
2762 dev_err(&adapter->netdev->dev,
2763 "Failed to enable %d MSI-X, trying %d\n",
2764 nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
2765
2766 ret = pci_enable_msix_range(adapter->pdev,
2767 adapter->intr.msix_entries,
2768 VMXNET3_LINUX_MIN_MSIX_VECT,
2769 VMXNET3_LINUX_MIN_MSIX_VECT);
2770 }
2771
2772 if (ret < 0) {
2773 dev_err(&adapter->netdev->dev,
2774 "Failed to enable MSI-X, error: %d\n", ret);
2775 }
2776
2777 return ret;
2778 }
2779
2780
2781 #endif /* CONFIG_PCI_MSI */
2782
2783 static void
2784 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2785 {
2786 u32 cfg;
2787 unsigned long flags;
2788
2789 /* intr settings */
2790 spin_lock_irqsave(&adapter->cmd_lock, flags);
2791 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2792 VMXNET3_CMD_GET_CONF_INTR);
2793 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2794 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2795 adapter->intr.type = cfg & 0x3;
2796 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2797
2798 if (adapter->intr.type == VMXNET3_IT_AUTO) {
2799 adapter->intr.type = VMXNET3_IT_MSIX;
2800 }
2801
2802 #ifdef CONFIG_PCI_MSI
2803 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2804 int i, nvec;
2805
2806 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
2807 1 : adapter->num_tx_queues;
2808 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
2809 0 : adapter->num_rx_queues;
2810 nvec += 1; /* for link event */
2811 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
2812 nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
2813
2814 for (i = 0; i < nvec; i++)
2815 adapter->intr.msix_entries[i].entry = i;
2816
2817 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec);
2818 if (nvec < 0)
2819 goto msix_err;
2820
2821 /* If we cannot allocate one MSIx vector per queue
2822 * then limit the number of rx queues to 1
2823 */
2824 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) {
2825 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2826 || adapter->num_rx_queues != 1) {
2827 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2828 netdev_err(adapter->netdev,
2829 "Number of rx queues : 1\n");
2830 adapter->num_rx_queues = 1;
2831 }
2832 }
2833
2834 adapter->intr.num_intrs = nvec;
2835 return;
2836
2837 msix_err:
2838 /* If we cannot allocate MSIx vectors use only one rx queue */
2839 dev_info(&adapter->pdev->dev,
2840 "Failed to enable MSI-X, error %d. "
2841 "Limiting #rx queues to 1, try MSI.\n", nvec);
2842
2843 adapter->intr.type = VMXNET3_IT_MSI;
2844 }
2845
2846 if (adapter->intr.type == VMXNET3_IT_MSI) {
2847 if (!pci_enable_msi(adapter->pdev)) {
2848 adapter->num_rx_queues = 1;
2849 adapter->intr.num_intrs = 1;
2850 return;
2851 }
2852 }
2853 #endif /* CONFIG_PCI_MSI */
2854
2855 adapter->num_rx_queues = 1;
2856 dev_info(&adapter->netdev->dev,
2857 "Using INTx interrupt, #Rx queues: 1.\n");
2858 adapter->intr.type = VMXNET3_IT_INTX;
2859
2860 /* INT-X related setting */
2861 adapter->intr.num_intrs = 1;
2862 }
2863
2864
2865 static void
2866 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
2867 {
2868 if (adapter->intr.type == VMXNET3_IT_MSIX)
2869 pci_disable_msix(adapter->pdev);
2870 else if (adapter->intr.type == VMXNET3_IT_MSI)
2871 pci_disable_msi(adapter->pdev);
2872 else
2873 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
2874 }
2875
2876
2877 static void
2878 vmxnet3_tx_timeout(struct net_device *netdev)
2879 {
2880 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2881 adapter->tx_timeout_count++;
2882
2883 netdev_err(adapter->netdev, "tx hang\n");
2884 schedule_work(&adapter->work);
2885 netif_wake_queue(adapter->netdev);
2886 }
2887
2888
2889 static void
2890 vmxnet3_reset_work(struct work_struct *data)
2891 {
2892 struct vmxnet3_adapter *adapter;
2893
2894 adapter = container_of(data, struct vmxnet3_adapter, work);
2895
2896 /* if another thread is resetting the device, no need to proceed */
2897 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2898 return;
2899
2900 /* if the device is closed, we must leave it alone */
2901 rtnl_lock();
2902 if (netif_running(adapter->netdev)) {
2903 netdev_notice(adapter->netdev, "resetting\n");
2904 vmxnet3_quiesce_dev(adapter);
2905 vmxnet3_reset_dev(adapter);
2906 vmxnet3_activate_dev(adapter);
2907 } else {
2908 netdev_info(adapter->netdev, "already closed\n");
2909 }
2910 rtnl_unlock();
2911
2912 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2913 }
2914
2915
2916 static int
2917 vmxnet3_probe_device(struct pci_dev *pdev,
2918 const struct pci_device_id *id)
2919 {
2920 static const struct net_device_ops vmxnet3_netdev_ops = {
2921 .ndo_open = vmxnet3_open,
2922 .ndo_stop = vmxnet3_close,
2923 .ndo_start_xmit = vmxnet3_xmit_frame,
2924 .ndo_set_mac_address = vmxnet3_set_mac_addr,
2925 .ndo_change_mtu = vmxnet3_change_mtu,
2926 .ndo_set_features = vmxnet3_set_features,
2927 .ndo_get_stats64 = vmxnet3_get_stats64,
2928 .ndo_tx_timeout = vmxnet3_tx_timeout,
2929 .ndo_set_rx_mode = vmxnet3_set_mc,
2930 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
2931 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
2932 #ifdef CONFIG_NET_POLL_CONTROLLER
2933 .ndo_poll_controller = vmxnet3_netpoll,
2934 #endif
2935 };
2936 int err;
2937 bool dma64 = false; /* stupid gcc */
2938 u32 ver;
2939 struct net_device *netdev;
2940 struct vmxnet3_adapter *adapter;
2941 u8 mac[ETH_ALEN];
2942 int size;
2943 int num_tx_queues;
2944 int num_rx_queues;
2945
2946 if (!pci_msi_enabled())
2947 enable_mq = 0;
2948
2949 #ifdef VMXNET3_RSS
2950 if (enable_mq)
2951 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
2952 (int)num_online_cpus());
2953 else
2954 #endif
2955 num_rx_queues = 1;
2956 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
2957
2958 if (enable_mq)
2959 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
2960 (int)num_online_cpus());
2961 else
2962 num_tx_queues = 1;
2963
2964 num_tx_queues = rounddown_pow_of_two(num_tx_queues);
2965 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
2966 max(num_tx_queues, num_rx_queues));
2967 dev_info(&pdev->dev,
2968 "# of Tx queues : %d, # of Rx queues : %d\n",
2969 num_tx_queues, num_rx_queues);
2970
2971 if (!netdev)
2972 return -ENOMEM;
2973
2974 pci_set_drvdata(pdev, netdev);
2975 adapter = netdev_priv(netdev);
2976 adapter->netdev = netdev;
2977 adapter->pdev = pdev;
2978
2979 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
2980 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
2981 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
2982
2983 spin_lock_init(&adapter->cmd_lock);
2984 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
2985 sizeof(struct vmxnet3_adapter),
2986 PCI_DMA_TODEVICE);
2987 adapter->shared = dma_alloc_coherent(
2988 &adapter->pdev->dev,
2989 sizeof(struct Vmxnet3_DriverShared),
2990 &adapter->shared_pa, GFP_KERNEL);
2991 if (!adapter->shared) {
2992 dev_err(&pdev->dev, "Failed to allocate memory\n");
2993 err = -ENOMEM;
2994 goto err_alloc_shared;
2995 }
2996
2997 adapter->num_rx_queues = num_rx_queues;
2998 adapter->num_tx_queues = num_tx_queues;
2999 adapter->rx_buf_per_pkt = 1;
3000
3001 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3002 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3003 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3004 &adapter->queue_desc_pa,
3005 GFP_KERNEL);
3006
3007 if (!adapter->tqd_start) {
3008 dev_err(&pdev->dev, "Failed to allocate memory\n");
3009 err = -ENOMEM;
3010 goto err_alloc_queue_desc;
3011 }
3012 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3013 adapter->num_tx_queues);
3014
3015 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3016 sizeof(struct Vmxnet3_PMConf),
3017 &adapter->pm_conf_pa,
3018 GFP_KERNEL);
3019 if (adapter->pm_conf == NULL) {
3020 err = -ENOMEM;
3021 goto err_alloc_pm;
3022 }
3023
3024 #ifdef VMXNET3_RSS
3025
3026 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
3027 sizeof(struct UPT1_RSSConf),
3028 &adapter->rss_conf_pa,
3029 GFP_KERNEL);
3030 if (adapter->rss_conf == NULL) {
3031 err = -ENOMEM;
3032 goto err_alloc_rss;
3033 }
3034 #endif /* VMXNET3_RSS */
3035
3036 err = vmxnet3_alloc_pci_resources(adapter, &dma64);
3037 if (err < 0)
3038 goto err_alloc_pci;
3039
3040 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3041 if (ver & 1) {
3042 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
3043 } else {
3044 dev_err(&pdev->dev,
3045 "Incompatible h/w version (0x%x) for adapter\n", ver);
3046 err = -EBUSY;
3047 goto err_ver;
3048 }
3049
3050 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3051 if (ver & 1) {
3052 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3053 } else {
3054 dev_err(&pdev->dev,
3055 "Incompatible upt version (0x%x) for adapter\n", ver);
3056 err = -EBUSY;
3057 goto err_ver;
3058 }
3059
3060 SET_NETDEV_DEV(netdev, &pdev->dev);
3061 vmxnet3_declare_features(adapter, dma64);
3062
3063 if (adapter->num_tx_queues == adapter->num_rx_queues)
3064 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
3065 else
3066 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3067
3068 vmxnet3_alloc_intr_resources(adapter);
3069
3070 #ifdef VMXNET3_RSS
3071 if (adapter->num_rx_queues > 1 &&
3072 adapter->intr.type == VMXNET3_IT_MSIX) {
3073 adapter->rss = true;
3074 netdev->hw_features |= NETIF_F_RXHASH;
3075 netdev->features |= NETIF_F_RXHASH;
3076 dev_dbg(&pdev->dev, "RSS is enabled.\n");
3077 } else {
3078 adapter->rss = false;
3079 }
3080 #endif
3081
3082 vmxnet3_read_mac_addr(adapter, mac);
3083 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3084
3085 netdev->netdev_ops = &vmxnet3_netdev_ops;
3086 vmxnet3_set_ethtool_ops(netdev);
3087 netdev->watchdog_timeo = 5 * HZ;
3088
3089 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3090 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3091
3092 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3093 int i;
3094 for (i = 0; i < adapter->num_rx_queues; i++) {
3095 netif_napi_add(adapter->netdev,
3096 &adapter->rx_queue[i].napi,
3097 vmxnet3_poll_rx_only, 64);
3098 }
3099 } else {
3100 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3101 vmxnet3_poll, 64);
3102 }
3103
3104 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3105 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3106
3107 netif_carrier_off(netdev);
3108 err = register_netdev(netdev);
3109
3110 if (err) {
3111 dev_err(&pdev->dev, "Failed to register adapter\n");
3112 goto err_register;
3113 }
3114
3115 vmxnet3_check_link(adapter, false);
3116 return 0;
3117
3118 err_register:
3119 vmxnet3_free_intr_resources(adapter);
3120 err_ver:
3121 vmxnet3_free_pci_resources(adapter);
3122 err_alloc_pci:
3123 #ifdef VMXNET3_RSS
3124 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3125 adapter->rss_conf, adapter->rss_conf_pa);
3126 err_alloc_rss:
3127 #endif
3128 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3129 adapter->pm_conf, adapter->pm_conf_pa);
3130 err_alloc_pm:
3131 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3132 adapter->queue_desc_pa);
3133 err_alloc_queue_desc:
3134 dma_free_coherent(&adapter->pdev->dev,
3135 sizeof(struct Vmxnet3_DriverShared),
3136 adapter->shared, adapter->shared_pa);
3137 err_alloc_shared:
3138 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3139 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3140 free_netdev(netdev);
3141 return err;
3142 }
3143
3144
3145 static void
3146 vmxnet3_remove_device(struct pci_dev *pdev)
3147 {
3148 struct net_device *netdev = pci_get_drvdata(pdev);
3149 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3150 int size = 0;
3151 int num_rx_queues;
3152
3153 #ifdef VMXNET3_RSS
3154 if (enable_mq)
3155 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3156 (int)num_online_cpus());
3157 else
3158 #endif
3159 num_rx_queues = 1;
3160 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3161
3162 cancel_work_sync(&adapter->work);
3163
3164 unregister_netdev(netdev);
3165
3166 vmxnet3_free_intr_resources(adapter);
3167 vmxnet3_free_pci_resources(adapter);
3168 #ifdef VMXNET3_RSS
3169 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3170 adapter->rss_conf, adapter->rss_conf_pa);
3171 #endif
3172 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3173 adapter->pm_conf, adapter->pm_conf_pa);
3174
3175 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3176 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3177 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3178 adapter->queue_desc_pa);
3179 dma_free_coherent(&adapter->pdev->dev,
3180 sizeof(struct Vmxnet3_DriverShared),
3181 adapter->shared, adapter->shared_pa);
3182 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3183 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3184 free_netdev(netdev);
3185 }
3186
3187
3188 #ifdef CONFIG_PM
3189
3190 static int
3191 vmxnet3_suspend(struct device *device)
3192 {
3193 struct pci_dev *pdev = to_pci_dev(device);
3194 struct net_device *netdev = pci_get_drvdata(pdev);
3195 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3196 struct Vmxnet3_PMConf *pmConf;
3197 struct ethhdr *ehdr;
3198 struct arphdr *ahdr;
3199 u8 *arpreq;
3200 struct in_device *in_dev;
3201 struct in_ifaddr *ifa;
3202 unsigned long flags;
3203 int i = 0;
3204
3205 if (!netif_running(netdev))
3206 return 0;
3207
3208 for (i = 0; i < adapter->num_rx_queues; i++)
3209 napi_disable(&adapter->rx_queue[i].napi);
3210
3211 vmxnet3_disable_all_intrs(adapter);
3212 vmxnet3_free_irqs(adapter);
3213 vmxnet3_free_intr_resources(adapter);
3214
3215 netif_device_detach(netdev);
3216 netif_tx_stop_all_queues(netdev);
3217
3218 /* Create wake-up filters. */
3219 pmConf = adapter->pm_conf;
3220 memset(pmConf, 0, sizeof(*pmConf));
3221
3222 if (adapter->wol & WAKE_UCAST) {
3223 pmConf->filters[i].patternSize = ETH_ALEN;
3224 pmConf->filters[i].maskSize = 1;
3225 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3226 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3227
3228 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3229 i++;
3230 }
3231
3232 if (adapter->wol & WAKE_ARP) {
3233 in_dev = in_dev_get(netdev);
3234 if (!in_dev)
3235 goto skip_arp;
3236
3237 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3238 if (!ifa)
3239 goto skip_arp;
3240
3241 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3242 sizeof(struct arphdr) + /* ARP header */
3243 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3244 2 * sizeof(u32); /*2 IPv4 addresses */
3245 pmConf->filters[i].maskSize =
3246 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3247
3248 /* ETH_P_ARP in Ethernet header. */
3249 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3250 ehdr->h_proto = htons(ETH_P_ARP);
3251
3252 /* ARPOP_REQUEST in ARP header. */
3253 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3254 ahdr->ar_op = htons(ARPOP_REQUEST);
3255 arpreq = (u8 *)(ahdr + 1);
3256
3257 /* The Unicast IPv4 address in 'tip' field. */
3258 arpreq += 2 * ETH_ALEN + sizeof(u32);
3259 *(u32 *)arpreq = ifa->ifa_address;
3260
3261 /* The mask for the relevant bits. */
3262 pmConf->filters[i].mask[0] = 0x00;
3263 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3264 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3265 pmConf->filters[i].mask[3] = 0x00;
3266 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3267 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3268 in_dev_put(in_dev);
3269
3270 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3271 i++;
3272 }
3273
3274 skip_arp:
3275 if (adapter->wol & WAKE_MAGIC)
3276 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3277
3278 pmConf->numFilters = i;
3279
3280 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3281 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3282 *pmConf));
3283 adapter->shared->devRead.pmConfDesc.confPA =
3284 cpu_to_le64(adapter->pm_conf_pa);
3285
3286 spin_lock_irqsave(&adapter->cmd_lock, flags);
3287 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3288 VMXNET3_CMD_UPDATE_PMCFG);
3289 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3290
3291 pci_save_state(pdev);
3292 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3293 adapter->wol);
3294 pci_disable_device(pdev);
3295 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3296
3297 return 0;
3298 }
3299
3300
3301 static int
3302 vmxnet3_resume(struct device *device)
3303 {
3304 int err;
3305 unsigned long flags;
3306 struct pci_dev *pdev = to_pci_dev(device);
3307 struct net_device *netdev = pci_get_drvdata(pdev);
3308 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3309
3310 if (!netif_running(netdev))
3311 return 0;
3312
3313 pci_set_power_state(pdev, PCI_D0);
3314 pci_restore_state(pdev);
3315 err = pci_enable_device_mem(pdev);
3316 if (err != 0)
3317 return err;
3318
3319 pci_enable_wake(pdev, PCI_D0, 0);
3320
3321 vmxnet3_alloc_intr_resources(adapter);
3322
3323 /* During hibernate and suspend, device has to be reinitialized as the
3324 * device state need not be preserved.
3325 */
3326
3327 /* Need not check adapter state as other reset tasks cannot run during
3328 * device resume.
3329 */
3330 spin_lock_irqsave(&adapter->cmd_lock, flags);
3331 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3332 VMXNET3_CMD_QUIESCE_DEV);
3333 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3334 vmxnet3_tq_cleanup_all(adapter);
3335 vmxnet3_rq_cleanup_all(adapter);
3336
3337 vmxnet3_reset_dev(adapter);
3338 err = vmxnet3_activate_dev(adapter);
3339 if (err != 0) {
3340 netdev_err(netdev,
3341 "failed to re-activate on resume, error: %d", err);
3342 vmxnet3_force_close(adapter);
3343 return err;
3344 }
3345 netif_device_attach(netdev);
3346
3347 return 0;
3348 }
3349
3350 static const struct dev_pm_ops vmxnet3_pm_ops = {
3351 .suspend = vmxnet3_suspend,
3352 .resume = vmxnet3_resume,
3353 .freeze = vmxnet3_suspend,
3354 .restore = vmxnet3_resume,
3355 };
3356 #endif
3357
3358 static struct pci_driver vmxnet3_driver = {
3359 .name = vmxnet3_driver_name,
3360 .id_table = vmxnet3_pciid_table,
3361 .probe = vmxnet3_probe_device,
3362 .remove = vmxnet3_remove_device,
3363 #ifdef CONFIG_PM
3364 .driver.pm = &vmxnet3_pm_ops,
3365 #endif
3366 };
3367
3368
3369 static int __init
3370 vmxnet3_init_module(void)
3371 {
3372 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
3373 VMXNET3_DRIVER_VERSION_REPORT);
3374 return pci_register_driver(&vmxnet3_driver);
3375 }
3376
3377 module_init(vmxnet3_init_module);
3378
3379
3380 static void
3381 vmxnet3_exit_module(void)
3382 {
3383 pci_unregister_driver(&vmxnet3_driver);
3384 }
3385
3386 module_exit(vmxnet3_exit_module);
3387
3388 MODULE_AUTHOR("VMware, Inc.");
3389 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3390 MODULE_LICENSE("GPL v2");
3391 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
Linux kernel - Deliverables
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