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Merge remote-tracking branch 'regulator/fix/max77802' into regulator-linus
[mirror_ubuntu-artful-kernel.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * The full GNU General Public License is included in this distribution in
21 * the file called "COPYING".
22 *
23 * Maintained by: pv-drivers@vmware.com
24 *
25 */
26
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29
30 #include "vmxnet3_int.h"
31
32 char vmxnet3_driver_name[] = "vmxnet3";
33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
34
35 /*
36 * PCI Device ID Table
37 * Last entry must be all 0s
38 */
39 static const struct pci_device_id vmxnet3_pciid_table[] = {
40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
41 {0}
42 };
43
44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
45
46 static int enable_mq = 1;
47
48 static void
49 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
50
51 /*
52 * Enable/Disable the given intr
53 */
54 static void
55 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
56 {
57 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
58 }
59
60
61 static void
62 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
63 {
64 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
65 }
66
67
68 /*
69 * Enable/Disable all intrs used by the device
70 */
71 static void
72 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
73 {
74 int i;
75
76 for (i = 0; i < adapter->intr.num_intrs; i++)
77 vmxnet3_enable_intr(adapter, i);
78 adapter->shared->devRead.intrConf.intrCtrl &=
79 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
80 }
81
82
83 static void
84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
85 {
86 int i;
87
88 adapter->shared->devRead.intrConf.intrCtrl |=
89 cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
90 for (i = 0; i < adapter->intr.num_intrs; i++)
91 vmxnet3_disable_intr(adapter, i);
92 }
93
94
95 static void
96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
97 {
98 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
99 }
100
101
102 static bool
103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
104 {
105 return tq->stopped;
106 }
107
108
109 static void
110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
111 {
112 tq->stopped = false;
113 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
114 }
115
116
117 static void
118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
119 {
120 tq->stopped = false;
121 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
122 }
123
124
125 static void
126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
127 {
128 tq->stopped = true;
129 tq->num_stop++;
130 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
131 }
132
133
134 /*
135 * Check the link state. This may start or stop the tx queue.
136 */
137 static void
138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
139 {
140 u32 ret;
141 int i;
142 unsigned long flags;
143
144 spin_lock_irqsave(&adapter->cmd_lock, flags);
145 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
146 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
147 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
148
149 adapter->link_speed = ret >> 16;
150 if (ret & 1) { /* Link is up. */
151 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
152 adapter->link_speed);
153 netif_carrier_on(adapter->netdev);
154
155 if (affectTxQueue) {
156 for (i = 0; i < adapter->num_tx_queues; i++)
157 vmxnet3_tq_start(&adapter->tx_queue[i],
158 adapter);
159 }
160 } else {
161 netdev_info(adapter->netdev, "NIC Link is Down\n");
162 netif_carrier_off(adapter->netdev);
163
164 if (affectTxQueue) {
165 for (i = 0; i < adapter->num_tx_queues; i++)
166 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
167 }
168 }
169 }
170
171 static void
172 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
173 {
174 int i;
175 unsigned long flags;
176 u32 events = le32_to_cpu(adapter->shared->ecr);
177 if (!events)
178 return;
179
180 vmxnet3_ack_events(adapter, events);
181
182 /* Check if link state has changed */
183 if (events & VMXNET3_ECR_LINK)
184 vmxnet3_check_link(adapter, true);
185
186 /* Check if there is an error on xmit/recv queues */
187 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
188 spin_lock_irqsave(&adapter->cmd_lock, flags);
189 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
190 VMXNET3_CMD_GET_QUEUE_STATUS);
191 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
192
193 for (i = 0; i < adapter->num_tx_queues; i++)
194 if (adapter->tqd_start[i].status.stopped)
195 dev_err(&adapter->netdev->dev,
196 "%s: tq[%d] error 0x%x\n",
197 adapter->netdev->name, i, le32_to_cpu(
198 adapter->tqd_start[i].status.error));
199 for (i = 0; i < adapter->num_rx_queues; i++)
200 if (adapter->rqd_start[i].status.stopped)
201 dev_err(&adapter->netdev->dev,
202 "%s: rq[%d] error 0x%x\n",
203 adapter->netdev->name, i,
204 adapter->rqd_start[i].status.error);
205
206 schedule_work(&adapter->work);
207 }
208 }
209
210 #ifdef __BIG_ENDIAN_BITFIELD
211 /*
212 * The device expects the bitfields in shared structures to be written in
213 * little endian. When CPU is big endian, the following routines are used to
214 * correctly read and write into ABI.
215 * The general technique used here is : double word bitfields are defined in
216 * opposite order for big endian architecture. Then before reading them in
217 * driver the complete double word is translated using le32_to_cpu. Similarly
218 * After the driver writes into bitfields, cpu_to_le32 is used to translate the
219 * double words into required format.
220 * In order to avoid touching bits in shared structure more than once, temporary
221 * descriptors are used. These are passed as srcDesc to following functions.
222 */
223 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
224 struct Vmxnet3_RxDesc *dstDesc)
225 {
226 u32 *src = (u32 *)srcDesc + 2;
227 u32 *dst = (u32 *)dstDesc + 2;
228 dstDesc->addr = le64_to_cpu(srcDesc->addr);
229 *dst = le32_to_cpu(*src);
230 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
231 }
232
233 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
234 struct Vmxnet3_TxDesc *dstDesc)
235 {
236 int i;
237 u32 *src = (u32 *)(srcDesc + 1);
238 u32 *dst = (u32 *)(dstDesc + 1);
239
240 /* Working backwards so that the gen bit is set at the end. */
241 for (i = 2; i > 0; i--) {
242 src--;
243 dst--;
244 *dst = cpu_to_le32(*src);
245 }
246 }
247
248
249 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
250 struct Vmxnet3_RxCompDesc *dstDesc)
251 {
252 int i = 0;
253 u32 *src = (u32 *)srcDesc;
254 u32 *dst = (u32 *)dstDesc;
255 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
256 *dst = le32_to_cpu(*src);
257 src++;
258 dst++;
259 }
260 }
261
262
263 /* Used to read bitfield values from double words. */
264 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
265 {
266 u32 temp = le32_to_cpu(*bitfield);
267 u32 mask = ((1 << size) - 1) << pos;
268 temp &= mask;
269 temp >>= pos;
270 return temp;
271 }
272
273
274
275 #endif /* __BIG_ENDIAN_BITFIELD */
276
277 #ifdef __BIG_ENDIAN_BITFIELD
278
279 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
280 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
281 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
282 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
283 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
284 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
285 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
286 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
287 VMXNET3_TCD_GEN_SIZE)
288 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
289 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
290 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
291 (dstrcd) = (tmp); \
292 vmxnet3_RxCompToCPU((rcd), (tmp)); \
293 } while (0)
294 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
295 (dstrxd) = (tmp); \
296 vmxnet3_RxDescToCPU((rxd), (tmp)); \
297 } while (0)
298
299 #else
300
301 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
302 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
303 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
304 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
305 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
306 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
307
308 #endif /* __BIG_ENDIAN_BITFIELD */
309
310
311 static void
312 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
313 struct pci_dev *pdev)
314 {
315 if (tbi->map_type == VMXNET3_MAP_SINGLE)
316 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len,
317 PCI_DMA_TODEVICE);
318 else if (tbi->map_type == VMXNET3_MAP_PAGE)
319 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len,
320 PCI_DMA_TODEVICE);
321 else
322 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
323
324 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
325 }
326
327
328 static int
329 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
330 struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
331 {
332 struct sk_buff *skb;
333 int entries = 0;
334
335 /* no out of order completion */
336 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
337 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
338
339 skb = tq->buf_info[eop_idx].skb;
340 BUG_ON(skb == NULL);
341 tq->buf_info[eop_idx].skb = NULL;
342
343 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
344
345 while (tq->tx_ring.next2comp != eop_idx) {
346 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
347 pdev);
348
349 /* update next2comp w/o tx_lock. Since we are marking more,
350 * instead of less, tx ring entries avail, the worst case is
351 * that the tx routine incorrectly re-queues a pkt due to
352 * insufficient tx ring entries.
353 */
354 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
355 entries++;
356 }
357
358 dev_kfree_skb_any(skb);
359 return entries;
360 }
361
362
363 static int
364 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
365 struct vmxnet3_adapter *adapter)
366 {
367 int completed = 0;
368 union Vmxnet3_GenericDesc *gdesc;
369
370 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
371 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
372 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,
439 tq->data_ring.size * tq->txdata_desc_size,
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,
482 tq->data_ring.size * tq->txdata_desc_size);
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 * tq->txdata_desc_size,
518 &tq->data_ring.basePA, GFP_KERNEL);
519 if (!tq->data_ring.base) {
520 netdev_err(adapter->netdev, "failed to allocate tx data ring\n");
521 goto err;
522 }
523
524 tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
525 tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
526 &tq->comp_ring.basePA, GFP_KERNEL);
527 if (!tq->comp_ring.base) {
528 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
529 goto err;
530 }
531
532 sz = tq->tx_ring.size * sizeof(tq->buf_info[0]);
533 tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz,
534 &tq->buf_info_pa, GFP_KERNEL);
535 if (!tq->buf_info)
536 goto err;
537
538 return 0;
539
540 err:
541 vmxnet3_tq_destroy(tq, adapter);
542 return -ENOMEM;
543 }
544
545 static void
546 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
547 {
548 int i;
549
550 for (i = 0; i < adapter->num_tx_queues; i++)
551 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
552 }
553
554 /*
555 * starting from ring->next2fill, allocate rx buffers for the given ring
556 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
557 * are allocated or allocation fails
558 */
559
560 static int
561 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
562 int num_to_alloc, struct vmxnet3_adapter *adapter)
563 {
564 int num_allocated = 0;
565 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
566 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
567 u32 val;
568
569 while (num_allocated <= num_to_alloc) {
570 struct vmxnet3_rx_buf_info *rbi;
571 union Vmxnet3_GenericDesc *gd;
572
573 rbi = rbi_base + ring->next2fill;
574 gd = ring->base + ring->next2fill;
575
576 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
577 if (rbi->skb == NULL) {
578 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
579 rbi->len,
580 GFP_KERNEL);
581 if (unlikely(rbi->skb == NULL)) {
582 rq->stats.rx_buf_alloc_failure++;
583 break;
584 }
585
586 rbi->dma_addr = dma_map_single(
587 &adapter->pdev->dev,
588 rbi->skb->data, rbi->len,
589 PCI_DMA_FROMDEVICE);
590 if (dma_mapping_error(&adapter->pdev->dev,
591 rbi->dma_addr)) {
592 dev_kfree_skb_any(rbi->skb);
593 rq->stats.rx_buf_alloc_failure++;
594 break;
595 }
596 } else {
597 /* rx buffer skipped by the device */
598 }
599 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
600 } else {
601 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
602 rbi->len != PAGE_SIZE);
603
604 if (rbi->page == NULL) {
605 rbi->page = alloc_page(GFP_ATOMIC);
606 if (unlikely(rbi->page == NULL)) {
607 rq->stats.rx_buf_alloc_failure++;
608 break;
609 }
610 rbi->dma_addr = dma_map_page(
611 &adapter->pdev->dev,
612 rbi->page, 0, PAGE_SIZE,
613 PCI_DMA_FROMDEVICE);
614 if (dma_mapping_error(&adapter->pdev->dev,
615 rbi->dma_addr)) {
616 put_page(rbi->page);
617 rq->stats.rx_buf_alloc_failure++;
618 break;
619 }
620 } else {
621 /* rx buffers skipped by the device */
622 }
623 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
624 }
625
626 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
627 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
628 | val | rbi->len);
629
630 /* Fill the last buffer but dont mark it ready, or else the
631 * device will think that the queue is full */
632 if (num_allocated == num_to_alloc)
633 break;
634
635 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
636 num_allocated++;
637 vmxnet3_cmd_ring_adv_next2fill(ring);
638 }
639
640 netdev_dbg(adapter->netdev,
641 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
642 num_allocated, ring->next2fill, ring->next2comp);
643
644 /* so that the device can distinguish a full ring and an empty ring */
645 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
646
647 return num_allocated;
648 }
649
650
651 static void
652 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
653 struct vmxnet3_rx_buf_info *rbi)
654 {
655 struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
656 skb_shinfo(skb)->nr_frags;
657
658 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
659
660 __skb_frag_set_page(frag, rbi->page);
661 frag->page_offset = 0;
662 skb_frag_size_set(frag, rcd->len);
663 skb->data_len += rcd->len;
664 skb->truesize += PAGE_SIZE;
665 skb_shinfo(skb)->nr_frags++;
666 }
667
668
669 static int
670 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
671 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
672 struct vmxnet3_adapter *adapter)
673 {
674 u32 dw2, len;
675 unsigned long buf_offset;
676 int i;
677 union Vmxnet3_GenericDesc *gdesc;
678 struct vmxnet3_tx_buf_info *tbi = NULL;
679
680 BUG_ON(ctx->copy_size > skb_headlen(skb));
681
682 /* use the previous gen bit for the SOP desc */
683 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
684
685 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
686 gdesc = ctx->sop_txd; /* both loops below can be skipped */
687
688 /* no need to map the buffer if headers are copied */
689 if (ctx->copy_size) {
690 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
691 tq->tx_ring.next2fill *
692 tq->txdata_desc_size);
693 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
694 ctx->sop_txd->dword[3] = 0;
695
696 tbi = tq->buf_info + tq->tx_ring.next2fill;
697 tbi->map_type = VMXNET3_MAP_NONE;
698
699 netdev_dbg(adapter->netdev,
700 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
701 tq->tx_ring.next2fill,
702 le64_to_cpu(ctx->sop_txd->txd.addr),
703 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
704 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
705
706 /* use the right gen for non-SOP desc */
707 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
708 }
709
710 /* linear part can use multiple tx desc if it's big */
711 len = skb_headlen(skb) - ctx->copy_size;
712 buf_offset = ctx->copy_size;
713 while (len) {
714 u32 buf_size;
715
716 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
717 buf_size = len;
718 dw2 |= len;
719 } else {
720 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
721 /* spec says that for TxDesc.len, 0 == 2^14 */
722 }
723
724 tbi = tq->buf_info + tq->tx_ring.next2fill;
725 tbi->map_type = VMXNET3_MAP_SINGLE;
726 tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
727 skb->data + buf_offset, buf_size,
728 PCI_DMA_TODEVICE);
729 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
730 return -EFAULT;
731
732 tbi->len = buf_size;
733
734 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
735 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
736
737 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
738 gdesc->dword[2] = cpu_to_le32(dw2);
739 gdesc->dword[3] = 0;
740
741 netdev_dbg(adapter->netdev,
742 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
743 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
744 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
745 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
746 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
747
748 len -= buf_size;
749 buf_offset += buf_size;
750 }
751
752 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
753 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
754 u32 buf_size;
755
756 buf_offset = 0;
757 len = skb_frag_size(frag);
758 while (len) {
759 tbi = tq->buf_info + tq->tx_ring.next2fill;
760 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
761 buf_size = len;
762 dw2 |= len;
763 } else {
764 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
765 /* spec says that for TxDesc.len, 0 == 2^14 */
766 }
767 tbi->map_type = VMXNET3_MAP_PAGE;
768 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
769 buf_offset, buf_size,
770 DMA_TO_DEVICE);
771 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
772 return -EFAULT;
773
774 tbi->len = buf_size;
775
776 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
777 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
778
779 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
780 gdesc->dword[2] = cpu_to_le32(dw2);
781 gdesc->dword[3] = 0;
782
783 netdev_dbg(adapter->netdev,
784 "txd[%u]: 0x%llx %u %u\n",
785 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
786 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
787 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
788 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
789
790 len -= buf_size;
791 buf_offset += buf_size;
792 }
793 }
794
795 ctx->eop_txd = gdesc;
796
797 /* set the last buf_info for the pkt */
798 tbi->skb = skb;
799 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
800
801 return 0;
802 }
803
804
805 /* Init all tx queues */
806 static void
807 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
808 {
809 int i;
810
811 for (i = 0; i < adapter->num_tx_queues; i++)
812 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
813 }
814
815
816 /*
817 * parse relevant protocol headers:
818 * For a tso pkt, relevant headers are L2/3/4 including options
819 * For a pkt requesting csum offloading, they are L2/3 and may include L4
820 * if it's a TCP/UDP pkt
821 *
822 * Returns:
823 * -1: error happens during parsing
824 * 0: protocol headers parsed, but too big to be copied
825 * 1: protocol headers parsed and copied
826 *
827 * Other effects:
828 * 1. related *ctx fields are updated.
829 * 2. ctx->copy_size is # of bytes copied
830 * 3. the portion to be copied is guaranteed to be in the linear part
831 *
832 */
833 static int
834 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
835 struct vmxnet3_tx_ctx *ctx,
836 struct vmxnet3_adapter *adapter)
837 {
838 u8 protocol = 0;
839
840 if (ctx->mss) { /* TSO */
841 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
842 ctx->l4_hdr_size = tcp_hdrlen(skb);
843 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
844 } else {
845 if (skb->ip_summed == CHECKSUM_PARTIAL) {
846 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
847
848 if (ctx->ipv4) {
849 const struct iphdr *iph = ip_hdr(skb);
850
851 protocol = iph->protocol;
852 } else if (ctx->ipv6) {
853 const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
854
855 protocol = ipv6h->nexthdr;
856 }
857
858 switch (protocol) {
859 case IPPROTO_TCP:
860 ctx->l4_hdr_size = tcp_hdrlen(skb);
861 break;
862 case IPPROTO_UDP:
863 ctx->l4_hdr_size = sizeof(struct udphdr);
864 break;
865 default:
866 ctx->l4_hdr_size = 0;
867 break;
868 }
869
870 ctx->copy_size = min(ctx->eth_ip_hdr_size +
871 ctx->l4_hdr_size, skb->len);
872 } else {
873 ctx->eth_ip_hdr_size = 0;
874 ctx->l4_hdr_size = 0;
875 /* copy as much as allowed */
876 ctx->copy_size = min_t(unsigned int,
877 tq->txdata_desc_size,
878 skb_headlen(skb));
879 }
880
881 if (skb->len <= VMXNET3_HDR_COPY_SIZE)
882 ctx->copy_size = skb->len;
883
884 /* make sure headers are accessible directly */
885 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
886 goto err;
887 }
888
889 if (unlikely(ctx->copy_size > tq->txdata_desc_size)) {
890 tq->stats.oversized_hdr++;
891 ctx->copy_size = 0;
892 return 0;
893 }
894
895 return 1;
896 err:
897 return -1;
898 }
899
900 /*
901 * copy relevant protocol headers to the transmit ring:
902 * For a tso pkt, relevant headers are L2/3/4 including options
903 * For a pkt requesting csum offloading, they are L2/3 and may include L4
904 * if it's a TCP/UDP pkt
905 *
906 *
907 * Note that this requires that vmxnet3_parse_hdr be called first to set the
908 * appropriate bits in ctx first
909 */
910 static void
911 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
912 struct vmxnet3_tx_ctx *ctx,
913 struct vmxnet3_adapter *adapter)
914 {
915 struct Vmxnet3_TxDataDesc *tdd;
916
917 tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base +
918 tq->tx_ring.next2fill *
919 tq->txdata_desc_size);
920
921 memcpy(tdd->data, skb->data, ctx->copy_size);
922 netdev_dbg(adapter->netdev,
923 "copy %u bytes to dataRing[%u]\n",
924 ctx->copy_size, tq->tx_ring.next2fill);
925 }
926
927
928 static void
929 vmxnet3_prepare_tso(struct sk_buff *skb,
930 struct vmxnet3_tx_ctx *ctx)
931 {
932 struct tcphdr *tcph = tcp_hdr(skb);
933
934 if (ctx->ipv4) {
935 struct iphdr *iph = ip_hdr(skb);
936
937 iph->check = 0;
938 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
939 IPPROTO_TCP, 0);
940 } else if (ctx->ipv6) {
941 struct ipv6hdr *iph = ipv6_hdr(skb);
942
943 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
944 IPPROTO_TCP, 0);
945 }
946 }
947
948 static int txd_estimate(const struct sk_buff *skb)
949 {
950 int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
951 int i;
952
953 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
954 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
955
956 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
957 }
958 return count;
959 }
960
961 /*
962 * Transmits a pkt thru a given tq
963 * Returns:
964 * NETDEV_TX_OK: descriptors are setup successfully
965 * NETDEV_TX_OK: error occurred, the pkt is dropped
966 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
967 *
968 * Side-effects:
969 * 1. tx ring may be changed
970 * 2. tq stats may be updated accordingly
971 * 3. shared->txNumDeferred may be updated
972 */
973
974 static int
975 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
976 struct vmxnet3_adapter *adapter, struct net_device *netdev)
977 {
978 int ret;
979 u32 count;
980 unsigned long flags;
981 struct vmxnet3_tx_ctx ctx;
982 union Vmxnet3_GenericDesc *gdesc;
983 #ifdef __BIG_ENDIAN_BITFIELD
984 /* Use temporary descriptor to avoid touching bits multiple times */
985 union Vmxnet3_GenericDesc tempTxDesc;
986 #endif
987
988 count = txd_estimate(skb);
989
990 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
991 ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
992
993 ctx.mss = skb_shinfo(skb)->gso_size;
994 if (ctx.mss) {
995 if (skb_header_cloned(skb)) {
996 if (unlikely(pskb_expand_head(skb, 0, 0,
997 GFP_ATOMIC) != 0)) {
998 tq->stats.drop_tso++;
999 goto drop_pkt;
1000 }
1001 tq->stats.copy_skb_header++;
1002 }
1003 vmxnet3_prepare_tso(skb, &ctx);
1004 } else {
1005 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
1006
1007 /* non-tso pkts must not use more than
1008 * VMXNET3_MAX_TXD_PER_PKT entries
1009 */
1010 if (skb_linearize(skb) != 0) {
1011 tq->stats.drop_too_many_frags++;
1012 goto drop_pkt;
1013 }
1014 tq->stats.linearized++;
1015
1016 /* recalculate the # of descriptors to use */
1017 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1018 }
1019 }
1020
1021 ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter);
1022 if (ret >= 0) {
1023 BUG_ON(ret <= 0 && ctx.copy_size != 0);
1024 /* hdrs parsed, check against other limits */
1025 if (ctx.mss) {
1026 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
1027 VMXNET3_MAX_TX_BUF_SIZE)) {
1028 tq->stats.drop_oversized_hdr++;
1029 goto drop_pkt;
1030 }
1031 } else {
1032 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1033 if (unlikely(ctx.eth_ip_hdr_size +
1034 skb->csum_offset >
1035 VMXNET3_MAX_CSUM_OFFSET)) {
1036 tq->stats.drop_oversized_hdr++;
1037 goto drop_pkt;
1038 }
1039 }
1040 }
1041 } else {
1042 tq->stats.drop_hdr_inspect_err++;
1043 goto drop_pkt;
1044 }
1045
1046 spin_lock_irqsave(&tq->tx_lock, flags);
1047
1048 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
1049 tq->stats.tx_ring_full++;
1050 netdev_dbg(adapter->netdev,
1051 "tx queue stopped on %s, next2comp %u"
1052 " next2fill %u\n", adapter->netdev->name,
1053 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
1054
1055 vmxnet3_tq_stop(tq, adapter);
1056 spin_unlock_irqrestore(&tq->tx_lock, flags);
1057 return NETDEV_TX_BUSY;
1058 }
1059
1060
1061 vmxnet3_copy_hdr(skb, tq, &ctx, adapter);
1062
1063 /* fill tx descs related to addr & len */
1064 if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter))
1065 goto unlock_drop_pkt;
1066
1067 /* setup the EOP desc */
1068 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1069
1070 /* setup the SOP desc */
1071 #ifdef __BIG_ENDIAN_BITFIELD
1072 gdesc = &tempTxDesc;
1073 gdesc->dword[2] = ctx.sop_txd->dword[2];
1074 gdesc->dword[3] = ctx.sop_txd->dword[3];
1075 #else
1076 gdesc = ctx.sop_txd;
1077 #endif
1078 if (ctx.mss) {
1079 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1080 gdesc->txd.om = VMXNET3_OM_TSO;
1081 gdesc->txd.msscof = ctx.mss;
1082 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1083 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1084 } else {
1085 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1086 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1087 gdesc->txd.om = VMXNET3_OM_CSUM;
1088 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1089 skb->csum_offset;
1090 } else {
1091 gdesc->txd.om = 0;
1092 gdesc->txd.msscof = 0;
1093 }
1094 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1095 }
1096
1097 if (skb_vlan_tag_present(skb)) {
1098 gdesc->txd.ti = 1;
1099 gdesc->txd.tci = skb_vlan_tag_get(skb);
1100 }
1101
1102 /* finally flips the GEN bit of the SOP desc. */
1103 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1104 VMXNET3_TXD_GEN);
1105 #ifdef __BIG_ENDIAN_BITFIELD
1106 /* Finished updating in bitfields of Tx Desc, so write them in original
1107 * place.
1108 */
1109 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1110 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1111 gdesc = ctx.sop_txd;
1112 #endif
1113 netdev_dbg(adapter->netdev,
1114 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1115 (u32)(ctx.sop_txd -
1116 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1117 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1118
1119 spin_unlock_irqrestore(&tq->tx_lock, flags);
1120
1121 if (le32_to_cpu(tq->shared->txNumDeferred) >=
1122 le32_to_cpu(tq->shared->txThreshold)) {
1123 tq->shared->txNumDeferred = 0;
1124 VMXNET3_WRITE_BAR0_REG(adapter,
1125 VMXNET3_REG_TXPROD + tq->qid * 8,
1126 tq->tx_ring.next2fill);
1127 }
1128
1129 return NETDEV_TX_OK;
1130
1131 unlock_drop_pkt:
1132 spin_unlock_irqrestore(&tq->tx_lock, flags);
1133 drop_pkt:
1134 tq->stats.drop_total++;
1135 dev_kfree_skb_any(skb);
1136 return NETDEV_TX_OK;
1137 }
1138
1139
1140 static netdev_tx_t
1141 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1142 {
1143 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1144
1145 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1146 return vmxnet3_tq_xmit(skb,
1147 &adapter->tx_queue[skb->queue_mapping],
1148 adapter, netdev);
1149 }
1150
1151
1152 static void
1153 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1154 struct sk_buff *skb,
1155 union Vmxnet3_GenericDesc *gdesc)
1156 {
1157 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1158 if (gdesc->rcd.v4 &&
1159 (le32_to_cpu(gdesc->dword[3]) &
1160 VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) {
1161 skb->ip_summed = CHECKSUM_UNNECESSARY;
1162 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1163 BUG_ON(gdesc->rcd.frg);
1164 } else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) &
1165 (1 << VMXNET3_RCD_TUC_SHIFT))) {
1166 skb->ip_summed = CHECKSUM_UNNECESSARY;
1167 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1168 BUG_ON(gdesc->rcd.frg);
1169 } else {
1170 if (gdesc->rcd.csum) {
1171 skb->csum = htons(gdesc->rcd.csum);
1172 skb->ip_summed = CHECKSUM_PARTIAL;
1173 } else {
1174 skb_checksum_none_assert(skb);
1175 }
1176 }
1177 } else {
1178 skb_checksum_none_assert(skb);
1179 }
1180 }
1181
1182
1183 static void
1184 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1185 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1186 {
1187 rq->stats.drop_err++;
1188 if (!rcd->fcs)
1189 rq->stats.drop_fcs++;
1190
1191 rq->stats.drop_total++;
1192
1193 /*
1194 * We do not unmap and chain the rx buffer to the skb.
1195 * We basically pretend this buffer is not used and will be recycled
1196 * by vmxnet3_rq_alloc_rx_buf()
1197 */
1198
1199 /*
1200 * ctx->skb may be NULL if this is the first and the only one
1201 * desc for the pkt
1202 */
1203 if (ctx->skb)
1204 dev_kfree_skb_irq(ctx->skb);
1205
1206 ctx->skb = NULL;
1207 }
1208
1209
1210 static u32
1211 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
1212 union Vmxnet3_GenericDesc *gdesc)
1213 {
1214 u32 hlen, maplen;
1215 union {
1216 void *ptr;
1217 struct ethhdr *eth;
1218 struct iphdr *ipv4;
1219 struct ipv6hdr *ipv6;
1220 struct tcphdr *tcp;
1221 } hdr;
1222 BUG_ON(gdesc->rcd.tcp == 0);
1223
1224 maplen = skb_headlen(skb);
1225 if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
1226 return 0;
1227
1228 hdr.eth = eth_hdr(skb);
1229 if (gdesc->rcd.v4) {
1230 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP));
1231 hdr.ptr += sizeof(struct ethhdr);
1232 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
1233 hlen = hdr.ipv4->ihl << 2;
1234 hdr.ptr += hdr.ipv4->ihl << 2;
1235 } else if (gdesc->rcd.v6) {
1236 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6));
1237 hdr.ptr += sizeof(struct ethhdr);
1238 /* Use an estimated value, since we also need to handle
1239 * TSO case.
1240 */
1241 if (hdr.ipv6->nexthdr != IPPROTO_TCP)
1242 return sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
1243 hlen = sizeof(struct ipv6hdr);
1244 hdr.ptr += sizeof(struct ipv6hdr);
1245 } else {
1246 /* Non-IP pkt, dont estimate header length */
1247 return 0;
1248 }
1249
1250 if (hlen + sizeof(struct tcphdr) > maplen)
1251 return 0;
1252
1253 return (hlen + (hdr.tcp->doff << 2));
1254 }
1255
1256 static int
1257 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1258 struct vmxnet3_adapter *adapter, int quota)
1259 {
1260 static const u32 rxprod_reg[2] = {
1261 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1262 };
1263 u32 num_pkts = 0;
1264 bool skip_page_frags = false;
1265 struct Vmxnet3_RxCompDesc *rcd;
1266 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1267 u16 segCnt = 0, mss = 0;
1268 #ifdef __BIG_ENDIAN_BITFIELD
1269 struct Vmxnet3_RxDesc rxCmdDesc;
1270 struct Vmxnet3_RxCompDesc rxComp;
1271 #endif
1272 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1273 &rxComp);
1274 while (rcd->gen == rq->comp_ring.gen) {
1275 struct vmxnet3_rx_buf_info *rbi;
1276 struct sk_buff *skb, *new_skb = NULL;
1277 struct page *new_page = NULL;
1278 dma_addr_t new_dma_addr;
1279 int num_to_alloc;
1280 struct Vmxnet3_RxDesc *rxd;
1281 u32 idx, ring_idx;
1282 struct vmxnet3_cmd_ring *ring = NULL;
1283 if (num_pkts >= quota) {
1284 /* we may stop even before we see the EOP desc of
1285 * the current pkt
1286 */
1287 break;
1288 }
1289 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 &&
1290 rcd->rqID != rq->dataRingQid);
1291 idx = rcd->rxdIdx;
1292 ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID);
1293 ring = rq->rx_ring + ring_idx;
1294 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1295 &rxCmdDesc);
1296 rbi = rq->buf_info[ring_idx] + idx;
1297
1298 BUG_ON(rxd->addr != rbi->dma_addr ||
1299 rxd->len != rbi->len);
1300
1301 if (unlikely(rcd->eop && rcd->err)) {
1302 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1303 goto rcd_done;
1304 }
1305
1306 if (rcd->sop) { /* first buf of the pkt */
1307 bool rxDataRingUsed;
1308 u16 len;
1309
1310 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1311 (rcd->rqID != rq->qid &&
1312 rcd->rqID != rq->dataRingQid));
1313
1314 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1315 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1316
1317 if (unlikely(rcd->len == 0)) {
1318 /* Pretend the rx buffer is skipped. */
1319 BUG_ON(!(rcd->sop && rcd->eop));
1320 netdev_dbg(adapter->netdev,
1321 "rxRing[%u][%u] 0 length\n",
1322 ring_idx, idx);
1323 goto rcd_done;
1324 }
1325
1326 skip_page_frags = false;
1327 ctx->skb = rbi->skb;
1328
1329 rxDataRingUsed =
1330 VMXNET3_RX_DATA_RING(adapter, rcd->rqID);
1331 len = rxDataRingUsed ? rcd->len : rbi->len;
1332 new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1333 len);
1334 if (new_skb == NULL) {
1335 /* Skb allocation failed, do not handover this
1336 * skb to stack. Reuse it. Drop the existing pkt
1337 */
1338 rq->stats.rx_buf_alloc_failure++;
1339 ctx->skb = NULL;
1340 rq->stats.drop_total++;
1341 skip_page_frags = true;
1342 goto rcd_done;
1343 }
1344
1345 if (rxDataRingUsed) {
1346 size_t sz;
1347
1348 BUG_ON(rcd->len > rq->data_ring.desc_size);
1349
1350 ctx->skb = new_skb;
1351 sz = rcd->rxdIdx * rq->data_ring.desc_size;
1352 memcpy(new_skb->data,
1353 &rq->data_ring.base[sz], rcd->len);
1354 } else {
1355 ctx->skb = rbi->skb;
1356
1357 new_dma_addr =
1358 dma_map_single(&adapter->pdev->dev,
1359 new_skb->data, rbi->len,
1360 PCI_DMA_FROMDEVICE);
1361 if (dma_mapping_error(&adapter->pdev->dev,
1362 new_dma_addr)) {
1363 dev_kfree_skb(new_skb);
1364 /* Skb allocation failed, do not
1365 * handover this skb to stack. Reuse
1366 * it. Drop the existing pkt.
1367 */
1368 rq->stats.rx_buf_alloc_failure++;
1369 ctx->skb = NULL;
1370 rq->stats.drop_total++;
1371 skip_page_frags = true;
1372 goto rcd_done;
1373 }
1374
1375 dma_unmap_single(&adapter->pdev->dev,
1376 rbi->dma_addr,
1377 rbi->len,
1378 PCI_DMA_FROMDEVICE);
1379
1380 /* Immediate refill */
1381 rbi->skb = new_skb;
1382 rbi->dma_addr = new_dma_addr;
1383 rxd->addr = cpu_to_le64(rbi->dma_addr);
1384 rxd->len = rbi->len;
1385 }
1386
1387 #ifdef VMXNET3_RSS
1388 if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1389 (adapter->netdev->features & NETIF_F_RXHASH))
1390 skb_set_hash(ctx->skb,
1391 le32_to_cpu(rcd->rssHash),
1392 PKT_HASH_TYPE_L3);
1393 #endif
1394 skb_put(ctx->skb, rcd->len);
1395
1396 if (VMXNET3_VERSION_GE_2(adapter) &&
1397 rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
1398 struct Vmxnet3_RxCompDescExt *rcdlro;
1399 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd;
1400
1401 segCnt = rcdlro->segCnt;
1402 WARN_ON_ONCE(segCnt == 0);
1403 mss = rcdlro->mss;
1404 if (unlikely(segCnt <= 1))
1405 segCnt = 0;
1406 } else {
1407 segCnt = 0;
1408 }
1409 } else {
1410 BUG_ON(ctx->skb == NULL && !skip_page_frags);
1411
1412 /* non SOP buffer must be type 1 in most cases */
1413 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1414 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1415
1416 /* If an sop buffer was dropped, skip all
1417 * following non-sop fragments. They will be reused.
1418 */
1419 if (skip_page_frags)
1420 goto rcd_done;
1421
1422 if (rcd->len) {
1423 new_page = alloc_page(GFP_ATOMIC);
1424 /* Replacement page frag could not be allocated.
1425 * Reuse this page. Drop the pkt and free the
1426 * skb which contained this page as a frag. Skip
1427 * processing all the following non-sop frags.
1428 */
1429 if (unlikely(!new_page)) {
1430 rq->stats.rx_buf_alloc_failure++;
1431 dev_kfree_skb(ctx->skb);
1432 ctx->skb = NULL;
1433 skip_page_frags = true;
1434 goto rcd_done;
1435 }
1436 new_dma_addr = dma_map_page(&adapter->pdev->dev,
1437 new_page,
1438 0, PAGE_SIZE,
1439 PCI_DMA_FROMDEVICE);
1440 if (dma_mapping_error(&adapter->pdev->dev,
1441 new_dma_addr)) {
1442 put_page(new_page);
1443 rq->stats.rx_buf_alloc_failure++;
1444 dev_kfree_skb(ctx->skb);
1445 ctx->skb = NULL;
1446 skip_page_frags = true;
1447 goto rcd_done;
1448 }
1449
1450 dma_unmap_page(&adapter->pdev->dev,
1451 rbi->dma_addr, rbi->len,
1452 PCI_DMA_FROMDEVICE);
1453
1454 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1455
1456 /* Immediate refill */
1457 rbi->page = new_page;
1458 rbi->dma_addr = new_dma_addr;
1459 rxd->addr = cpu_to_le64(rbi->dma_addr);
1460 rxd->len = rbi->len;
1461 }
1462 }
1463
1464
1465 skb = ctx->skb;
1466 if (rcd->eop) {
1467 u32 mtu = adapter->netdev->mtu;
1468 skb->len += skb->data_len;
1469
1470 vmxnet3_rx_csum(adapter, skb,
1471 (union Vmxnet3_GenericDesc *)rcd);
1472 skb->protocol = eth_type_trans(skb, adapter->netdev);
1473 if (!rcd->tcp || !adapter->lro)
1474 goto not_lro;
1475
1476 if (segCnt != 0 && mss != 0) {
1477 skb_shinfo(skb)->gso_type = rcd->v4 ?
1478 SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1479 skb_shinfo(skb)->gso_size = mss;
1480 skb_shinfo(skb)->gso_segs = segCnt;
1481 } else if (segCnt != 0 || skb->len > mtu) {
1482 u32 hlen;
1483
1484 hlen = vmxnet3_get_hdr_len(adapter, skb,
1485 (union Vmxnet3_GenericDesc *)rcd);
1486 if (hlen == 0)
1487 goto not_lro;
1488
1489 skb_shinfo(skb)->gso_type =
1490 rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1491 if (segCnt != 0) {
1492 skb_shinfo(skb)->gso_segs = segCnt;
1493 skb_shinfo(skb)->gso_size =
1494 DIV_ROUND_UP(skb->len -
1495 hlen, segCnt);
1496 } else {
1497 skb_shinfo(skb)->gso_size = mtu - hlen;
1498 }
1499 }
1500 not_lro:
1501 if (unlikely(rcd->ts))
1502 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1503
1504 if (adapter->netdev->features & NETIF_F_LRO)
1505 netif_receive_skb(skb);
1506 else
1507 napi_gro_receive(&rq->napi, skb);
1508
1509 ctx->skb = NULL;
1510 num_pkts++;
1511 }
1512
1513 rcd_done:
1514 /* device may have skipped some rx descs */
1515 ring->next2comp = idx;
1516 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1517 ring = rq->rx_ring + ring_idx;
1518 while (num_to_alloc) {
1519 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1520 &rxCmdDesc);
1521 BUG_ON(!rxd->addr);
1522
1523 /* Recv desc is ready to be used by the device */
1524 rxd->gen = ring->gen;
1525 vmxnet3_cmd_ring_adv_next2fill(ring);
1526 num_to_alloc--;
1527 }
1528
1529 /* if needed, update the register */
1530 if (unlikely(rq->shared->updateRxProd)) {
1531 VMXNET3_WRITE_BAR0_REG(adapter,
1532 rxprod_reg[ring_idx] + rq->qid * 8,
1533 ring->next2fill);
1534 }
1535
1536 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1537 vmxnet3_getRxComp(rcd,
1538 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1539 }
1540
1541 return num_pkts;
1542 }
1543
1544
1545 static void
1546 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1547 struct vmxnet3_adapter *adapter)
1548 {
1549 u32 i, ring_idx;
1550 struct Vmxnet3_RxDesc *rxd;
1551
1552 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1553 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1554 #ifdef __BIG_ENDIAN_BITFIELD
1555 struct Vmxnet3_RxDesc rxDesc;
1556 #endif
1557 vmxnet3_getRxDesc(rxd,
1558 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1559
1560 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1561 rq->buf_info[ring_idx][i].skb) {
1562 dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1563 rxd->len, PCI_DMA_FROMDEVICE);
1564 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1565 rq->buf_info[ring_idx][i].skb = NULL;
1566 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1567 rq->buf_info[ring_idx][i].page) {
1568 dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1569 rxd->len, PCI_DMA_FROMDEVICE);
1570 put_page(rq->buf_info[ring_idx][i].page);
1571 rq->buf_info[ring_idx][i].page = NULL;
1572 }
1573 }
1574
1575 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1576 rq->rx_ring[ring_idx].next2fill =
1577 rq->rx_ring[ring_idx].next2comp = 0;
1578 }
1579
1580 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1581 rq->comp_ring.next2proc = 0;
1582 }
1583
1584
1585 static void
1586 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1587 {
1588 int i;
1589
1590 for (i = 0; i < adapter->num_rx_queues; i++)
1591 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1592 }
1593
1594
1595 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1596 struct vmxnet3_adapter *adapter)
1597 {
1598 int i;
1599 int j;
1600
1601 /* all rx buffers must have already been freed */
1602 for (i = 0; i < 2; i++) {
1603 if (rq->buf_info[i]) {
1604 for (j = 0; j < rq->rx_ring[i].size; j++)
1605 BUG_ON(rq->buf_info[i][j].page != NULL);
1606 }
1607 }
1608
1609
1610 for (i = 0; i < 2; i++) {
1611 if (rq->rx_ring[i].base) {
1612 dma_free_coherent(&adapter->pdev->dev,
1613 rq->rx_ring[i].size
1614 * sizeof(struct Vmxnet3_RxDesc),
1615 rq->rx_ring[i].base,
1616 rq->rx_ring[i].basePA);
1617 rq->rx_ring[i].base = NULL;
1618 }
1619 rq->buf_info[i] = NULL;
1620 }
1621
1622 if (rq->data_ring.base) {
1623 dma_free_coherent(&adapter->pdev->dev,
1624 rq->rx_ring[0].size * rq->data_ring.desc_size,
1625 rq->data_ring.base, rq->data_ring.basePA);
1626 rq->data_ring.base = NULL;
1627 }
1628
1629 if (rq->comp_ring.base) {
1630 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
1631 * sizeof(struct Vmxnet3_RxCompDesc),
1632 rq->comp_ring.base, rq->comp_ring.basePA);
1633 rq->comp_ring.base = NULL;
1634 }
1635
1636 if (rq->buf_info[0]) {
1637 size_t sz = sizeof(struct vmxnet3_rx_buf_info) *
1638 (rq->rx_ring[0].size + rq->rx_ring[1].size);
1639 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
1640 rq->buf_info_pa);
1641 }
1642 }
1643
1644 static void
1645 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter)
1646 {
1647 int i;
1648
1649 for (i = 0; i < adapter->num_rx_queues; i++) {
1650 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1651
1652 if (rq->data_ring.base) {
1653 dma_free_coherent(&adapter->pdev->dev,
1654 (rq->rx_ring[0].size *
1655 rq->data_ring.desc_size),
1656 rq->data_ring.base,
1657 rq->data_ring.basePA);
1658 rq->data_ring.base = NULL;
1659 rq->data_ring.desc_size = 0;
1660 }
1661 }
1662 }
1663
1664 static int
1665 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1666 struct vmxnet3_adapter *adapter)
1667 {
1668 int i;
1669
1670 /* initialize buf_info */
1671 for (i = 0; i < rq->rx_ring[0].size; i++) {
1672
1673 /* 1st buf for a pkt is skbuff */
1674 if (i % adapter->rx_buf_per_pkt == 0) {
1675 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1676 rq->buf_info[0][i].len = adapter->skb_buf_size;
1677 } else { /* subsequent bufs for a pkt is frag */
1678 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1679 rq->buf_info[0][i].len = PAGE_SIZE;
1680 }
1681 }
1682 for (i = 0; i < rq->rx_ring[1].size; i++) {
1683 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1684 rq->buf_info[1][i].len = PAGE_SIZE;
1685 }
1686
1687 /* reset internal state and allocate buffers for both rings */
1688 for (i = 0; i < 2; i++) {
1689 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1690
1691 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1692 sizeof(struct Vmxnet3_RxDesc));
1693 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1694 }
1695 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1696 adapter) == 0) {
1697 /* at least has 1 rx buffer for the 1st ring */
1698 return -ENOMEM;
1699 }
1700 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1701
1702 /* reset the comp ring */
1703 rq->comp_ring.next2proc = 0;
1704 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1705 sizeof(struct Vmxnet3_RxCompDesc));
1706 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1707
1708 /* reset rxctx */
1709 rq->rx_ctx.skb = NULL;
1710
1711 /* stats are not reset */
1712 return 0;
1713 }
1714
1715
1716 static int
1717 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1718 {
1719 int i, err = 0;
1720
1721 for (i = 0; i < adapter->num_rx_queues; i++) {
1722 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1723 if (unlikely(err)) {
1724 dev_err(&adapter->netdev->dev, "%s: failed to "
1725 "initialize rx queue%i\n",
1726 adapter->netdev->name, i);
1727 break;
1728 }
1729 }
1730 return err;
1731
1732 }
1733
1734
1735 static int
1736 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1737 {
1738 int i;
1739 size_t sz;
1740 struct vmxnet3_rx_buf_info *bi;
1741
1742 for (i = 0; i < 2; i++) {
1743
1744 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1745 rq->rx_ring[i].base = dma_alloc_coherent(
1746 &adapter->pdev->dev, sz,
1747 &rq->rx_ring[i].basePA,
1748 GFP_KERNEL);
1749 if (!rq->rx_ring[i].base) {
1750 netdev_err(adapter->netdev,
1751 "failed to allocate rx ring %d\n", i);
1752 goto err;
1753 }
1754 }
1755
1756 if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) {
1757 sz = rq->rx_ring[0].size * rq->data_ring.desc_size;
1758 rq->data_ring.base =
1759 dma_alloc_coherent(&adapter->pdev->dev, sz,
1760 &rq->data_ring.basePA,
1761 GFP_KERNEL);
1762 if (!rq->data_ring.base) {
1763 netdev_err(adapter->netdev,
1764 "rx data ring will be disabled\n");
1765 adapter->rxdataring_enabled = false;
1766 }
1767 } else {
1768 rq->data_ring.base = NULL;
1769 rq->data_ring.desc_size = 0;
1770 }
1771
1772 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1773 rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
1774 &rq->comp_ring.basePA,
1775 GFP_KERNEL);
1776 if (!rq->comp_ring.base) {
1777 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
1778 goto err;
1779 }
1780
1781 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1782 rq->rx_ring[1].size);
1783 bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa,
1784 GFP_KERNEL);
1785 if (!bi)
1786 goto err;
1787
1788 rq->buf_info[0] = bi;
1789 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1790
1791 return 0;
1792
1793 err:
1794 vmxnet3_rq_destroy(rq, adapter);
1795 return -ENOMEM;
1796 }
1797
1798
1799 static int
1800 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1801 {
1802 int i, err = 0;
1803
1804 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
1805
1806 for (i = 0; i < adapter->num_rx_queues; i++) {
1807 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1808 if (unlikely(err)) {
1809 dev_err(&adapter->netdev->dev,
1810 "%s: failed to create rx queue%i\n",
1811 adapter->netdev->name, i);
1812 goto err_out;
1813 }
1814 }
1815
1816 if (!adapter->rxdataring_enabled)
1817 vmxnet3_rq_destroy_all_rxdataring(adapter);
1818
1819 return err;
1820 err_out:
1821 vmxnet3_rq_destroy_all(adapter);
1822 return err;
1823
1824 }
1825
1826 /* Multiple queue aware polling function for tx and rx */
1827
1828 static int
1829 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1830 {
1831 int rcd_done = 0, i;
1832 if (unlikely(adapter->shared->ecr))
1833 vmxnet3_process_events(adapter);
1834 for (i = 0; i < adapter->num_tx_queues; i++)
1835 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1836
1837 for (i = 0; i < adapter->num_rx_queues; i++)
1838 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1839 adapter, budget);
1840 return rcd_done;
1841 }
1842
1843
1844 static int
1845 vmxnet3_poll(struct napi_struct *napi, int budget)
1846 {
1847 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1848 struct vmxnet3_rx_queue, napi);
1849 int rxd_done;
1850
1851 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1852
1853 if (rxd_done < budget) {
1854 napi_complete_done(napi, rxd_done);
1855 vmxnet3_enable_all_intrs(rx_queue->adapter);
1856 }
1857 return rxd_done;
1858 }
1859
1860 /*
1861 * NAPI polling function for MSI-X mode with multiple Rx queues
1862 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1863 */
1864
1865 static int
1866 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1867 {
1868 struct vmxnet3_rx_queue *rq = container_of(napi,
1869 struct vmxnet3_rx_queue, napi);
1870 struct vmxnet3_adapter *adapter = rq->adapter;
1871 int rxd_done;
1872
1873 /* When sharing interrupt with corresponding tx queue, process
1874 * tx completions in that queue as well
1875 */
1876 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1877 struct vmxnet3_tx_queue *tq =
1878 &adapter->tx_queue[rq - adapter->rx_queue];
1879 vmxnet3_tq_tx_complete(tq, adapter);
1880 }
1881
1882 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1883
1884 if (rxd_done < budget) {
1885 napi_complete_done(napi, rxd_done);
1886 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1887 }
1888 return rxd_done;
1889 }
1890
1891
1892 #ifdef CONFIG_PCI_MSI
1893
1894 /*
1895 * Handle completion interrupts on tx queues
1896 * Returns whether or not the intr is handled
1897 */
1898
1899 static irqreturn_t
1900 vmxnet3_msix_tx(int irq, void *data)
1901 {
1902 struct vmxnet3_tx_queue *tq = data;
1903 struct vmxnet3_adapter *adapter = tq->adapter;
1904
1905 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1906 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1907
1908 /* Handle the case where only one irq is allocate for all tx queues */
1909 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1910 int i;
1911 for (i = 0; i < adapter->num_tx_queues; i++) {
1912 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1913 vmxnet3_tq_tx_complete(txq, adapter);
1914 }
1915 } else {
1916 vmxnet3_tq_tx_complete(tq, adapter);
1917 }
1918 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1919
1920 return IRQ_HANDLED;
1921 }
1922
1923
1924 /*
1925 * Handle completion interrupts on rx queues. Returns whether or not the
1926 * intr is handled
1927 */
1928
1929 static irqreturn_t
1930 vmxnet3_msix_rx(int irq, void *data)
1931 {
1932 struct vmxnet3_rx_queue *rq = data;
1933 struct vmxnet3_adapter *adapter = rq->adapter;
1934
1935 /* disable intr if needed */
1936 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1937 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1938 napi_schedule(&rq->napi);
1939
1940 return IRQ_HANDLED;
1941 }
1942
1943 /*
1944 *----------------------------------------------------------------------------
1945 *
1946 * vmxnet3_msix_event --
1947 *
1948 * vmxnet3 msix event intr handler
1949 *
1950 * Result:
1951 * whether or not the intr is handled
1952 *
1953 *----------------------------------------------------------------------------
1954 */
1955
1956 static irqreturn_t
1957 vmxnet3_msix_event(int irq, void *data)
1958 {
1959 struct net_device *dev = data;
1960 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1961
1962 /* disable intr if needed */
1963 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1964 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1965
1966 if (adapter->shared->ecr)
1967 vmxnet3_process_events(adapter);
1968
1969 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1970
1971 return IRQ_HANDLED;
1972 }
1973
1974 #endif /* CONFIG_PCI_MSI */
1975
1976
1977 /* Interrupt handler for vmxnet3 */
1978 static irqreturn_t
1979 vmxnet3_intr(int irq, void *dev_id)
1980 {
1981 struct net_device *dev = dev_id;
1982 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1983
1984 if (adapter->intr.type == VMXNET3_IT_INTX) {
1985 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1986 if (unlikely(icr == 0))
1987 /* not ours */
1988 return IRQ_NONE;
1989 }
1990
1991
1992 /* disable intr if needed */
1993 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1994 vmxnet3_disable_all_intrs(adapter);
1995
1996 napi_schedule(&adapter->rx_queue[0].napi);
1997
1998 return IRQ_HANDLED;
1999 }
2000
2001 #ifdef CONFIG_NET_POLL_CONTROLLER
2002
2003 /* netpoll callback. */
2004 static void
2005 vmxnet3_netpoll(struct net_device *netdev)
2006 {
2007 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2008
2009 switch (adapter->intr.type) {
2010 #ifdef CONFIG_PCI_MSI
2011 case VMXNET3_IT_MSIX: {
2012 int i;
2013 for (i = 0; i < adapter->num_rx_queues; i++)
2014 vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
2015 break;
2016 }
2017 #endif
2018 case VMXNET3_IT_MSI:
2019 default:
2020 vmxnet3_intr(0, adapter->netdev);
2021 break;
2022 }
2023
2024 }
2025 #endif /* CONFIG_NET_POLL_CONTROLLER */
2026
2027 static int
2028 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
2029 {
2030 struct vmxnet3_intr *intr = &adapter->intr;
2031 int err = 0, i;
2032 int vector = 0;
2033
2034 #ifdef CONFIG_PCI_MSI
2035 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2036 for (i = 0; i < adapter->num_tx_queues; i++) {
2037 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2038 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
2039 adapter->netdev->name, vector);
2040 err = request_irq(
2041 intr->msix_entries[vector].vector,
2042 vmxnet3_msix_tx, 0,
2043 adapter->tx_queue[i].name,
2044 &adapter->tx_queue[i]);
2045 } else {
2046 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
2047 adapter->netdev->name, vector);
2048 }
2049 if (err) {
2050 dev_err(&adapter->netdev->dev,
2051 "Failed to request irq for MSIX, %s, "
2052 "error %d\n",
2053 adapter->tx_queue[i].name, err);
2054 return err;
2055 }
2056
2057 /* Handle the case where only 1 MSIx was allocated for
2058 * all tx queues */
2059 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
2060 for (; i < adapter->num_tx_queues; i++)
2061 adapter->tx_queue[i].comp_ring.intr_idx
2062 = vector;
2063 vector++;
2064 break;
2065 } else {
2066 adapter->tx_queue[i].comp_ring.intr_idx
2067 = vector++;
2068 }
2069 }
2070 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
2071 vector = 0;
2072
2073 for (i = 0; i < adapter->num_rx_queues; i++) {
2074 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
2075 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
2076 adapter->netdev->name, vector);
2077 else
2078 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
2079 adapter->netdev->name, vector);
2080 err = request_irq(intr->msix_entries[vector].vector,
2081 vmxnet3_msix_rx, 0,
2082 adapter->rx_queue[i].name,
2083 &(adapter->rx_queue[i]));
2084 if (err) {
2085 netdev_err(adapter->netdev,
2086 "Failed to request irq for MSIX, "
2087 "%s, error %d\n",
2088 adapter->rx_queue[i].name, err);
2089 return err;
2090 }
2091
2092 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
2093 }
2094
2095 sprintf(intr->event_msi_vector_name, "%s-event-%d",
2096 adapter->netdev->name, vector);
2097 err = request_irq(intr->msix_entries[vector].vector,
2098 vmxnet3_msix_event, 0,
2099 intr->event_msi_vector_name, adapter->netdev);
2100 intr->event_intr_idx = vector;
2101
2102 } else if (intr->type == VMXNET3_IT_MSI) {
2103 adapter->num_rx_queues = 1;
2104 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
2105 adapter->netdev->name, adapter->netdev);
2106 } else {
2107 #endif
2108 adapter->num_rx_queues = 1;
2109 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
2110 IRQF_SHARED, adapter->netdev->name,
2111 adapter->netdev);
2112 #ifdef CONFIG_PCI_MSI
2113 }
2114 #endif
2115 intr->num_intrs = vector + 1;
2116 if (err) {
2117 netdev_err(adapter->netdev,
2118 "Failed to request irq (intr type:%d), error %d\n",
2119 intr->type, err);
2120 } else {
2121 /* Number of rx queues will not change after this */
2122 for (i = 0; i < adapter->num_rx_queues; i++) {
2123 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2124 rq->qid = i;
2125 rq->qid2 = i + adapter->num_rx_queues;
2126 rq->dataRingQid = i + 2 * adapter->num_rx_queues;
2127 }
2128
2129 /* init our intr settings */
2130 for (i = 0; i < intr->num_intrs; i++)
2131 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
2132 if (adapter->intr.type != VMXNET3_IT_MSIX) {
2133 adapter->intr.event_intr_idx = 0;
2134 for (i = 0; i < adapter->num_tx_queues; i++)
2135 adapter->tx_queue[i].comp_ring.intr_idx = 0;
2136 adapter->rx_queue[0].comp_ring.intr_idx = 0;
2137 }
2138
2139 netdev_info(adapter->netdev,
2140 "intr type %u, mode %u, %u vectors allocated\n",
2141 intr->type, intr->mask_mode, intr->num_intrs);
2142 }
2143
2144 return err;
2145 }
2146
2147
2148 static void
2149 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
2150 {
2151 struct vmxnet3_intr *intr = &adapter->intr;
2152 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
2153
2154 switch (intr->type) {
2155 #ifdef CONFIG_PCI_MSI
2156 case VMXNET3_IT_MSIX:
2157 {
2158 int i, vector = 0;
2159
2160 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2161 for (i = 0; i < adapter->num_tx_queues; i++) {
2162 free_irq(intr->msix_entries[vector++].vector,
2163 &(adapter->tx_queue[i]));
2164 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
2165 break;
2166 }
2167 }
2168
2169 for (i = 0; i < adapter->num_rx_queues; i++) {
2170 free_irq(intr->msix_entries[vector++].vector,
2171 &(adapter->rx_queue[i]));
2172 }
2173
2174 free_irq(intr->msix_entries[vector].vector,
2175 adapter->netdev);
2176 BUG_ON(vector >= intr->num_intrs);
2177 break;
2178 }
2179 #endif
2180 case VMXNET3_IT_MSI:
2181 free_irq(adapter->pdev->irq, adapter->netdev);
2182 break;
2183 case VMXNET3_IT_INTX:
2184 free_irq(adapter->pdev->irq, adapter->netdev);
2185 break;
2186 default:
2187 BUG();
2188 }
2189 }
2190
2191
2192 static void
2193 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
2194 {
2195 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2196 u16 vid;
2197
2198 /* allow untagged pkts */
2199 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
2200
2201 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2202 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2203 }
2204
2205
2206 static int
2207 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2208 {
2209 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2210
2211 if (!(netdev->flags & IFF_PROMISC)) {
2212 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2213 unsigned long flags;
2214
2215 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2216 spin_lock_irqsave(&adapter->cmd_lock, flags);
2217 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2218 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2219 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2220 }
2221
2222 set_bit(vid, adapter->active_vlans);
2223
2224 return 0;
2225 }
2226
2227
2228 static int
2229 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2230 {
2231 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2232
2233 if (!(netdev->flags & IFF_PROMISC)) {
2234 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2235 unsigned long flags;
2236
2237 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2238 spin_lock_irqsave(&adapter->cmd_lock, flags);
2239 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2240 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2241 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2242 }
2243
2244 clear_bit(vid, adapter->active_vlans);
2245
2246 return 0;
2247 }
2248
2249
2250 static u8 *
2251 vmxnet3_copy_mc(struct net_device *netdev)
2252 {
2253 u8 *buf = NULL;
2254 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2255
2256 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2257 if (sz <= 0xffff) {
2258 /* We may be called with BH disabled */
2259 buf = kmalloc(sz, GFP_ATOMIC);
2260 if (buf) {
2261 struct netdev_hw_addr *ha;
2262 int i = 0;
2263
2264 netdev_for_each_mc_addr(ha, netdev)
2265 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2266 ETH_ALEN);
2267 }
2268 }
2269 return buf;
2270 }
2271
2272
2273 static void
2274 vmxnet3_set_mc(struct net_device *netdev)
2275 {
2276 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2277 unsigned long flags;
2278 struct Vmxnet3_RxFilterConf *rxConf =
2279 &adapter->shared->devRead.rxFilterConf;
2280 u8 *new_table = NULL;
2281 dma_addr_t new_table_pa = 0;
2282 bool new_table_pa_valid = false;
2283 u32 new_mode = VMXNET3_RXM_UCAST;
2284
2285 if (netdev->flags & IFF_PROMISC) {
2286 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2287 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2288
2289 new_mode |= VMXNET3_RXM_PROMISC;
2290 } else {
2291 vmxnet3_restore_vlan(adapter);
2292 }
2293
2294 if (netdev->flags & IFF_BROADCAST)
2295 new_mode |= VMXNET3_RXM_BCAST;
2296
2297 if (netdev->flags & IFF_ALLMULTI)
2298 new_mode |= VMXNET3_RXM_ALL_MULTI;
2299 else
2300 if (!netdev_mc_empty(netdev)) {
2301 new_table = vmxnet3_copy_mc(netdev);
2302 if (new_table) {
2303 size_t sz = netdev_mc_count(netdev) * ETH_ALEN;
2304
2305 rxConf->mfTableLen = cpu_to_le16(sz);
2306 new_table_pa = dma_map_single(
2307 &adapter->pdev->dev,
2308 new_table,
2309 sz,
2310 PCI_DMA_TODEVICE);
2311 if (!dma_mapping_error(&adapter->pdev->dev,
2312 new_table_pa)) {
2313 new_mode |= VMXNET3_RXM_MCAST;
2314 new_table_pa_valid = true;
2315 rxConf->mfTablePA = cpu_to_le64(
2316 new_table_pa);
2317 }
2318 }
2319 if (!new_table_pa_valid) {
2320 netdev_info(netdev,
2321 "failed to copy mcast list, setting ALL_MULTI\n");
2322 new_mode |= VMXNET3_RXM_ALL_MULTI;
2323 }
2324 }
2325
2326 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2327 rxConf->mfTableLen = 0;
2328 rxConf->mfTablePA = 0;
2329 }
2330
2331 spin_lock_irqsave(&adapter->cmd_lock, flags);
2332 if (new_mode != rxConf->rxMode) {
2333 rxConf->rxMode = cpu_to_le32(new_mode);
2334 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2335 VMXNET3_CMD_UPDATE_RX_MODE);
2336 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2337 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2338 }
2339
2340 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2341 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2342 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2343
2344 if (new_table_pa_valid)
2345 dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2346 rxConf->mfTableLen, PCI_DMA_TODEVICE);
2347 kfree(new_table);
2348 }
2349
2350 void
2351 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2352 {
2353 int i;
2354
2355 for (i = 0; i < adapter->num_rx_queues; i++)
2356 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2357 }
2358
2359
2360 /*
2361 * Set up driver_shared based on settings in adapter.
2362 */
2363
2364 static void
2365 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2366 {
2367 struct Vmxnet3_DriverShared *shared = adapter->shared;
2368 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2369 struct Vmxnet3_TxQueueConf *tqc;
2370 struct Vmxnet3_RxQueueConf *rqc;
2371 int i;
2372
2373 memset(shared, 0, sizeof(*shared));
2374
2375 /* driver settings */
2376 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2377 devRead->misc.driverInfo.version = cpu_to_le32(
2378 VMXNET3_DRIVER_VERSION_NUM);
2379 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2380 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2381 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2382 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2383 *((u32 *)&devRead->misc.driverInfo.gos));
2384 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2385 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2386
2387 devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2388 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2389
2390 /* set up feature flags */
2391 if (adapter->netdev->features & NETIF_F_RXCSUM)
2392 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2393
2394 if (adapter->netdev->features & NETIF_F_LRO) {
2395 devRead->misc.uptFeatures |= UPT1_F_LRO;
2396 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2397 }
2398 if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2399 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2400
2401 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2402 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2403 devRead->misc.queueDescLen = cpu_to_le32(
2404 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2405 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2406
2407 /* tx queue settings */
2408 devRead->misc.numTxQueues = adapter->num_tx_queues;
2409 for (i = 0; i < adapter->num_tx_queues; i++) {
2410 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2411 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2412 tqc = &adapter->tqd_start[i].conf;
2413 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2414 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2415 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2416 tqc->ddPA = cpu_to_le64(tq->buf_info_pa);
2417 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2418 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2419 tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size);
2420 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2421 tqc->ddLen = cpu_to_le32(
2422 sizeof(struct vmxnet3_tx_buf_info) *
2423 tqc->txRingSize);
2424 tqc->intrIdx = tq->comp_ring.intr_idx;
2425 }
2426
2427 /* rx queue settings */
2428 devRead->misc.numRxQueues = adapter->num_rx_queues;
2429 for (i = 0; i < adapter->num_rx_queues; i++) {
2430 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2431 rqc = &adapter->rqd_start[i].conf;
2432 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2433 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2434 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2435 rqc->ddPA = cpu_to_le64(rq->buf_info_pa);
2436 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2437 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2438 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2439 rqc->ddLen = cpu_to_le32(
2440 sizeof(struct vmxnet3_rx_buf_info) *
2441 (rqc->rxRingSize[0] +
2442 rqc->rxRingSize[1]));
2443 rqc->intrIdx = rq->comp_ring.intr_idx;
2444 if (VMXNET3_VERSION_GE_3(adapter)) {
2445 rqc->rxDataRingBasePA =
2446 cpu_to_le64(rq->data_ring.basePA);
2447 rqc->rxDataRingDescSize =
2448 cpu_to_le16(rq->data_ring.desc_size);
2449 }
2450 }
2451
2452 #ifdef VMXNET3_RSS
2453 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2454
2455 if (adapter->rss) {
2456 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2457
2458 devRead->misc.uptFeatures |= UPT1_F_RSS;
2459 devRead->misc.numRxQueues = adapter->num_rx_queues;
2460 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2461 UPT1_RSS_HASH_TYPE_IPV4 |
2462 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2463 UPT1_RSS_HASH_TYPE_IPV6;
2464 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2465 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2466 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2467 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2468
2469 for (i = 0; i < rssConf->indTableSize; i++)
2470 rssConf->indTable[i] = ethtool_rxfh_indir_default(
2471 i, adapter->num_rx_queues);
2472
2473 devRead->rssConfDesc.confVer = 1;
2474 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2475 devRead->rssConfDesc.confPA =
2476 cpu_to_le64(adapter->rss_conf_pa);
2477 }
2478
2479 #endif /* VMXNET3_RSS */
2480
2481 /* intr settings */
2482 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2483 VMXNET3_IMM_AUTO;
2484 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2485 for (i = 0; i < adapter->intr.num_intrs; i++)
2486 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2487
2488 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2489 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2490
2491 /* rx filter settings */
2492 devRead->rxFilterConf.rxMode = 0;
2493 vmxnet3_restore_vlan(adapter);
2494 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2495
2496 /* the rest are already zeroed */
2497 }
2498
2499 static void
2500 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter)
2501 {
2502 struct Vmxnet3_DriverShared *shared = adapter->shared;
2503 union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2504 unsigned long flags;
2505
2506 if (!VMXNET3_VERSION_GE_3(adapter))
2507 return;
2508
2509 spin_lock_irqsave(&adapter->cmd_lock, flags);
2510 cmdInfo->varConf.confVer = 1;
2511 cmdInfo->varConf.confLen =
2512 cpu_to_le32(sizeof(*adapter->coal_conf));
2513 cmdInfo->varConf.confPA = cpu_to_le64(adapter->coal_conf_pa);
2514
2515 if (adapter->default_coal_mode) {
2516 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2517 VMXNET3_CMD_GET_COALESCE);
2518 } else {
2519 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2520 VMXNET3_CMD_SET_COALESCE);
2521 }
2522
2523 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2524 }
2525
2526 int
2527 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2528 {
2529 int err, i;
2530 u32 ret;
2531 unsigned long flags;
2532
2533 netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2534 " ring sizes %u %u %u\n", adapter->netdev->name,
2535 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2536 adapter->tx_queue[0].tx_ring.size,
2537 adapter->rx_queue[0].rx_ring[0].size,
2538 adapter->rx_queue[0].rx_ring[1].size);
2539
2540 vmxnet3_tq_init_all(adapter);
2541 err = vmxnet3_rq_init_all(adapter);
2542 if (err) {
2543 netdev_err(adapter->netdev,
2544 "Failed to init rx queue error %d\n", err);
2545 goto rq_err;
2546 }
2547
2548 err = vmxnet3_request_irqs(adapter);
2549 if (err) {
2550 netdev_err(adapter->netdev,
2551 "Failed to setup irq for error %d\n", err);
2552 goto irq_err;
2553 }
2554
2555 vmxnet3_setup_driver_shared(adapter);
2556
2557 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2558 adapter->shared_pa));
2559 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2560 adapter->shared_pa));
2561 spin_lock_irqsave(&adapter->cmd_lock, flags);
2562 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2563 VMXNET3_CMD_ACTIVATE_DEV);
2564 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2565 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2566
2567 if (ret != 0) {
2568 netdev_err(adapter->netdev,
2569 "Failed to activate dev: error %u\n", ret);
2570 err = -EINVAL;
2571 goto activate_err;
2572 }
2573
2574 vmxnet3_init_coalesce(adapter);
2575
2576 for (i = 0; i < adapter->num_rx_queues; i++) {
2577 VMXNET3_WRITE_BAR0_REG(adapter,
2578 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2579 adapter->rx_queue[i].rx_ring[0].next2fill);
2580 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2581 (i * VMXNET3_REG_ALIGN)),
2582 adapter->rx_queue[i].rx_ring[1].next2fill);
2583 }
2584
2585 /* Apply the rx filter settins last. */
2586 vmxnet3_set_mc(adapter->netdev);
2587
2588 /*
2589 * Check link state when first activating device. It will start the
2590 * tx queue if the link is up.
2591 */
2592 vmxnet3_check_link(adapter, true);
2593 for (i = 0; i < adapter->num_rx_queues; i++)
2594 napi_enable(&adapter->rx_queue[i].napi);
2595 vmxnet3_enable_all_intrs(adapter);
2596 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2597 return 0;
2598
2599 activate_err:
2600 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2601 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2602 vmxnet3_free_irqs(adapter);
2603 irq_err:
2604 rq_err:
2605 /* free up buffers we allocated */
2606 vmxnet3_rq_cleanup_all(adapter);
2607 return err;
2608 }
2609
2610
2611 void
2612 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2613 {
2614 unsigned long flags;
2615 spin_lock_irqsave(&adapter->cmd_lock, flags);
2616 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2617 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2618 }
2619
2620
2621 int
2622 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2623 {
2624 int i;
2625 unsigned long flags;
2626 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2627 return 0;
2628
2629
2630 spin_lock_irqsave(&adapter->cmd_lock, flags);
2631 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2632 VMXNET3_CMD_QUIESCE_DEV);
2633 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2634 vmxnet3_disable_all_intrs(adapter);
2635
2636 for (i = 0; i < adapter->num_rx_queues; i++)
2637 napi_disable(&adapter->rx_queue[i].napi);
2638 netif_tx_disable(adapter->netdev);
2639 adapter->link_speed = 0;
2640 netif_carrier_off(adapter->netdev);
2641
2642 vmxnet3_tq_cleanup_all(adapter);
2643 vmxnet3_rq_cleanup_all(adapter);
2644 vmxnet3_free_irqs(adapter);
2645 return 0;
2646 }
2647
2648
2649 static void
2650 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2651 {
2652 u32 tmp;
2653
2654 tmp = *(u32 *)mac;
2655 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2656
2657 tmp = (mac[5] << 8) | mac[4];
2658 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2659 }
2660
2661
2662 static int
2663 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2664 {
2665 struct sockaddr *addr = p;
2666 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2667
2668 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2669 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2670
2671 return 0;
2672 }
2673
2674
2675 /* ==================== initialization and cleanup routines ============ */
2676
2677 static int
2678 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2679 {
2680 int err;
2681 unsigned long mmio_start, mmio_len;
2682 struct pci_dev *pdev = adapter->pdev;
2683
2684 err = pci_enable_device(pdev);
2685 if (err) {
2686 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
2687 return err;
2688 }
2689
2690 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2691 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2692 dev_err(&pdev->dev,
2693 "pci_set_consistent_dma_mask failed\n");
2694 err = -EIO;
2695 goto err_set_mask;
2696 }
2697 *dma64 = true;
2698 } else {
2699 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2700 dev_err(&pdev->dev,
2701 "pci_set_dma_mask failed\n");
2702 err = -EIO;
2703 goto err_set_mask;
2704 }
2705 *dma64 = false;
2706 }
2707
2708 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2709 vmxnet3_driver_name);
2710 if (err) {
2711 dev_err(&pdev->dev,
2712 "Failed to request region for adapter: error %d\n", err);
2713 goto err_set_mask;
2714 }
2715
2716 pci_set_master(pdev);
2717
2718 mmio_start = pci_resource_start(pdev, 0);
2719 mmio_len = pci_resource_len(pdev, 0);
2720 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2721 if (!adapter->hw_addr0) {
2722 dev_err(&pdev->dev, "Failed to map bar0\n");
2723 err = -EIO;
2724 goto err_ioremap;
2725 }
2726
2727 mmio_start = pci_resource_start(pdev, 1);
2728 mmio_len = pci_resource_len(pdev, 1);
2729 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2730 if (!adapter->hw_addr1) {
2731 dev_err(&pdev->dev, "Failed to map bar1\n");
2732 err = -EIO;
2733 goto err_bar1;
2734 }
2735 return 0;
2736
2737 err_bar1:
2738 iounmap(adapter->hw_addr0);
2739 err_ioremap:
2740 pci_release_selected_regions(pdev, (1 << 2) - 1);
2741 err_set_mask:
2742 pci_disable_device(pdev);
2743 return err;
2744 }
2745
2746
2747 static void
2748 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2749 {
2750 BUG_ON(!adapter->pdev);
2751
2752 iounmap(adapter->hw_addr0);
2753 iounmap(adapter->hw_addr1);
2754 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2755 pci_disable_device(adapter->pdev);
2756 }
2757
2758
2759 static void
2760 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2761 {
2762 size_t sz, i, ring0_size, ring1_size, comp_size;
2763 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2764
2765
2766 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2767 VMXNET3_MAX_ETH_HDR_SIZE) {
2768 adapter->skb_buf_size = adapter->netdev->mtu +
2769 VMXNET3_MAX_ETH_HDR_SIZE;
2770 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2771 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2772
2773 adapter->rx_buf_per_pkt = 1;
2774 } else {
2775 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2776 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2777 VMXNET3_MAX_ETH_HDR_SIZE;
2778 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2779 }
2780
2781 /*
2782 * for simplicity, force the ring0 size to be a multiple of
2783 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2784 */
2785 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2786 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2787 ring0_size = (ring0_size + sz - 1) / sz * sz;
2788 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2789 sz * sz);
2790 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2791 ring1_size = (ring1_size + sz - 1) / sz * sz;
2792 ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
2793 sz * sz);
2794 comp_size = ring0_size + ring1_size;
2795
2796 for (i = 0; i < adapter->num_rx_queues; i++) {
2797 rq = &adapter->rx_queue[i];
2798 rq->rx_ring[0].size = ring0_size;
2799 rq->rx_ring[1].size = ring1_size;
2800 rq->comp_ring.size = comp_size;
2801 }
2802 }
2803
2804
2805 int
2806 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2807 u32 rx_ring_size, u32 rx_ring2_size,
2808 u16 txdata_desc_size, u16 rxdata_desc_size)
2809 {
2810 int err = 0, i;
2811
2812 for (i = 0; i < adapter->num_tx_queues; i++) {
2813 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2814 tq->tx_ring.size = tx_ring_size;
2815 tq->data_ring.size = tx_ring_size;
2816 tq->comp_ring.size = tx_ring_size;
2817 tq->txdata_desc_size = txdata_desc_size;
2818 tq->shared = &adapter->tqd_start[i].ctrl;
2819 tq->stopped = true;
2820 tq->adapter = adapter;
2821 tq->qid = i;
2822 err = vmxnet3_tq_create(tq, adapter);
2823 /*
2824 * Too late to change num_tx_queues. We cannot do away with
2825 * lesser number of queues than what we asked for
2826 */
2827 if (err)
2828 goto queue_err;
2829 }
2830
2831 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2832 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2833 vmxnet3_adjust_rx_ring_size(adapter);
2834
2835 adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
2836 for (i = 0; i < adapter->num_rx_queues; i++) {
2837 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2838 /* qid and qid2 for rx queues will be assigned later when num
2839 * of rx queues is finalized after allocating intrs */
2840 rq->shared = &adapter->rqd_start[i].ctrl;
2841 rq->adapter = adapter;
2842 rq->data_ring.desc_size = rxdata_desc_size;
2843 err = vmxnet3_rq_create(rq, adapter);
2844 if (err) {
2845 if (i == 0) {
2846 netdev_err(adapter->netdev,
2847 "Could not allocate any rx queues. "
2848 "Aborting.\n");
2849 goto queue_err;
2850 } else {
2851 netdev_info(adapter->netdev,
2852 "Number of rx queues changed "
2853 "to : %d.\n", i);
2854 adapter->num_rx_queues = i;
2855 err = 0;
2856 break;
2857 }
2858 }
2859 }
2860
2861 if (!adapter->rxdataring_enabled)
2862 vmxnet3_rq_destroy_all_rxdataring(adapter);
2863
2864 return err;
2865 queue_err:
2866 vmxnet3_tq_destroy_all(adapter);
2867 return err;
2868 }
2869
2870 static int
2871 vmxnet3_open(struct net_device *netdev)
2872 {
2873 struct vmxnet3_adapter *adapter;
2874 int err, i;
2875
2876 adapter = netdev_priv(netdev);
2877
2878 for (i = 0; i < adapter->num_tx_queues; i++)
2879 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2880
2881 if (VMXNET3_VERSION_GE_3(adapter)) {
2882 unsigned long flags;
2883 u16 txdata_desc_size;
2884
2885 spin_lock_irqsave(&adapter->cmd_lock, flags);
2886 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2887 VMXNET3_CMD_GET_TXDATA_DESC_SIZE);
2888 txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter,
2889 VMXNET3_REG_CMD);
2890 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2891
2892 if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) ||
2893 (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) ||
2894 (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) {
2895 adapter->txdata_desc_size =
2896 sizeof(struct Vmxnet3_TxDataDesc);
2897 } else {
2898 adapter->txdata_desc_size = txdata_desc_size;
2899 }
2900 } else {
2901 adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc);
2902 }
2903
2904 err = vmxnet3_create_queues(adapter,
2905 adapter->tx_ring_size,
2906 adapter->rx_ring_size,
2907 adapter->rx_ring2_size,
2908 adapter->txdata_desc_size,
2909 adapter->rxdata_desc_size);
2910 if (err)
2911 goto queue_err;
2912
2913 err = vmxnet3_activate_dev(adapter);
2914 if (err)
2915 goto activate_err;
2916
2917 return 0;
2918
2919 activate_err:
2920 vmxnet3_rq_destroy_all(adapter);
2921 vmxnet3_tq_destroy_all(adapter);
2922 queue_err:
2923 return err;
2924 }
2925
2926
2927 static int
2928 vmxnet3_close(struct net_device *netdev)
2929 {
2930 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2931
2932 /*
2933 * Reset_work may be in the middle of resetting the device, wait for its
2934 * completion.
2935 */
2936 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2937 msleep(1);
2938
2939 vmxnet3_quiesce_dev(adapter);
2940
2941 vmxnet3_rq_destroy_all(adapter);
2942 vmxnet3_tq_destroy_all(adapter);
2943
2944 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2945
2946
2947 return 0;
2948 }
2949
2950
2951 void
2952 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2953 {
2954 int i;
2955
2956 /*
2957 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2958 * vmxnet3_close() will deadlock.
2959 */
2960 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2961
2962 /* we need to enable NAPI, otherwise dev_close will deadlock */
2963 for (i = 0; i < adapter->num_rx_queues; i++)
2964 napi_enable(&adapter->rx_queue[i].napi);
2965 /*
2966 * Need to clear the quiesce bit to ensure that vmxnet3_close
2967 * can quiesce the device properly
2968 */
2969 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2970 dev_close(adapter->netdev);
2971 }
2972
2973
2974 static int
2975 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2976 {
2977 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2978 int err = 0;
2979
2980 netdev->mtu = new_mtu;
2981
2982 /*
2983 * Reset_work may be in the middle of resetting the device, wait for its
2984 * completion.
2985 */
2986 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2987 msleep(1);
2988
2989 if (netif_running(netdev)) {
2990 vmxnet3_quiesce_dev(adapter);
2991 vmxnet3_reset_dev(adapter);
2992
2993 /* we need to re-create the rx queue based on the new mtu */
2994 vmxnet3_rq_destroy_all(adapter);
2995 vmxnet3_adjust_rx_ring_size(adapter);
2996 err = vmxnet3_rq_create_all(adapter);
2997 if (err) {
2998 netdev_err(netdev,
2999 "failed to re-create rx queues, "
3000 " error %d. Closing it.\n", err);
3001 goto out;
3002 }
3003
3004 err = vmxnet3_activate_dev(adapter);
3005 if (err) {
3006 netdev_err(netdev,
3007 "failed to re-activate, error %d. "
3008 "Closing it\n", err);
3009 goto out;
3010 }
3011 }
3012
3013 out:
3014 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3015 if (err)
3016 vmxnet3_force_close(adapter);
3017
3018 return err;
3019 }
3020
3021
3022 static void
3023 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
3024 {
3025 struct net_device *netdev = adapter->netdev;
3026
3027 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
3028 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
3029 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
3030 NETIF_F_LRO;
3031 if (dma64)
3032 netdev->hw_features |= NETIF_F_HIGHDMA;
3033 netdev->vlan_features = netdev->hw_features &
3034 ~(NETIF_F_HW_VLAN_CTAG_TX |
3035 NETIF_F_HW_VLAN_CTAG_RX);
3036 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
3037 }
3038
3039
3040 static void
3041 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
3042 {
3043 u32 tmp;
3044
3045 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
3046 *(u32 *)mac = tmp;
3047
3048 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
3049 mac[4] = tmp & 0xff;
3050 mac[5] = (tmp >> 8) & 0xff;
3051 }
3052
3053 #ifdef CONFIG_PCI_MSI
3054
3055 /*
3056 * Enable MSIx vectors.
3057 * Returns :
3058 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
3059 * were enabled.
3060 * number of vectors which were enabled otherwise (this number is greater
3061 * than VMXNET3_LINUX_MIN_MSIX_VECT)
3062 */
3063
3064 static int
3065 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
3066 {
3067 int ret = pci_enable_msix_range(adapter->pdev,
3068 adapter->intr.msix_entries, nvec, nvec);
3069
3070 if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
3071 dev_err(&adapter->netdev->dev,
3072 "Failed to enable %d MSI-X, trying %d\n",
3073 nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
3074
3075 ret = pci_enable_msix_range(adapter->pdev,
3076 adapter->intr.msix_entries,
3077 VMXNET3_LINUX_MIN_MSIX_VECT,
3078 VMXNET3_LINUX_MIN_MSIX_VECT);
3079 }
3080
3081 if (ret < 0) {
3082 dev_err(&adapter->netdev->dev,
3083 "Failed to enable MSI-X, error: %d\n", ret);
3084 }
3085
3086 return ret;
3087 }
3088
3089
3090 #endif /* CONFIG_PCI_MSI */
3091
3092 static void
3093 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
3094 {
3095 u32 cfg;
3096 unsigned long flags;
3097
3098 /* intr settings */
3099 spin_lock_irqsave(&adapter->cmd_lock, flags);
3100 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3101 VMXNET3_CMD_GET_CONF_INTR);
3102 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3103 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3104 adapter->intr.type = cfg & 0x3;
3105 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
3106
3107 if (adapter->intr.type == VMXNET3_IT_AUTO) {
3108 adapter->intr.type = VMXNET3_IT_MSIX;
3109 }
3110
3111 #ifdef CONFIG_PCI_MSI
3112 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3113 int i, nvec;
3114
3115 nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
3116 1 : adapter->num_tx_queues;
3117 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
3118 0 : adapter->num_rx_queues;
3119 nvec += 1; /* for link event */
3120 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
3121 nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
3122
3123 for (i = 0; i < nvec; i++)
3124 adapter->intr.msix_entries[i].entry = i;
3125
3126 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec);
3127 if (nvec < 0)
3128 goto msix_err;
3129
3130 /* If we cannot allocate one MSIx vector per queue
3131 * then limit the number of rx queues to 1
3132 */
3133 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) {
3134 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
3135 || adapter->num_rx_queues != 1) {
3136 adapter->share_intr = VMXNET3_INTR_TXSHARE;
3137 netdev_err(adapter->netdev,
3138 "Number of rx queues : 1\n");
3139 adapter->num_rx_queues = 1;
3140 }
3141 }
3142
3143 adapter->intr.num_intrs = nvec;
3144 return;
3145
3146 msix_err:
3147 /* If we cannot allocate MSIx vectors use only one rx queue */
3148 dev_info(&adapter->pdev->dev,
3149 "Failed to enable MSI-X, error %d. "
3150 "Limiting #rx queues to 1, try MSI.\n", nvec);
3151
3152 adapter->intr.type = VMXNET3_IT_MSI;
3153 }
3154
3155 if (adapter->intr.type == VMXNET3_IT_MSI) {
3156 if (!pci_enable_msi(adapter->pdev)) {
3157 adapter->num_rx_queues = 1;
3158 adapter->intr.num_intrs = 1;
3159 return;
3160 }
3161 }
3162 #endif /* CONFIG_PCI_MSI */
3163
3164 adapter->num_rx_queues = 1;
3165 dev_info(&adapter->netdev->dev,
3166 "Using INTx interrupt, #Rx queues: 1.\n");
3167 adapter->intr.type = VMXNET3_IT_INTX;
3168
3169 /* INT-X related setting */
3170 adapter->intr.num_intrs = 1;
3171 }
3172
3173
3174 static void
3175 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
3176 {
3177 if (adapter->intr.type == VMXNET3_IT_MSIX)
3178 pci_disable_msix(adapter->pdev);
3179 else if (adapter->intr.type == VMXNET3_IT_MSI)
3180 pci_disable_msi(adapter->pdev);
3181 else
3182 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
3183 }
3184
3185
3186 static void
3187 vmxnet3_tx_timeout(struct net_device *netdev)
3188 {
3189 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3190 adapter->tx_timeout_count++;
3191
3192 netdev_err(adapter->netdev, "tx hang\n");
3193 schedule_work(&adapter->work);
3194 }
3195
3196
3197 static void
3198 vmxnet3_reset_work(struct work_struct *data)
3199 {
3200 struct vmxnet3_adapter *adapter;
3201
3202 adapter = container_of(data, struct vmxnet3_adapter, work);
3203
3204 /* if another thread is resetting the device, no need to proceed */
3205 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3206 return;
3207
3208 /* if the device is closed, we must leave it alone */
3209 rtnl_lock();
3210 if (netif_running(adapter->netdev)) {
3211 netdev_notice(adapter->netdev, "resetting\n");
3212 vmxnet3_quiesce_dev(adapter);
3213 vmxnet3_reset_dev(adapter);
3214 vmxnet3_activate_dev(adapter);
3215 } else {
3216 netdev_info(adapter->netdev, "already closed\n");
3217 }
3218 rtnl_unlock();
3219
3220 netif_wake_queue(adapter->netdev);
3221 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3222 }
3223
3224
3225 static int
3226 vmxnet3_probe_device(struct pci_dev *pdev,
3227 const struct pci_device_id *id)
3228 {
3229 static const struct net_device_ops vmxnet3_netdev_ops = {
3230 .ndo_open = vmxnet3_open,
3231 .ndo_stop = vmxnet3_close,
3232 .ndo_start_xmit = vmxnet3_xmit_frame,
3233 .ndo_set_mac_address = vmxnet3_set_mac_addr,
3234 .ndo_change_mtu = vmxnet3_change_mtu,
3235 .ndo_set_features = vmxnet3_set_features,
3236 .ndo_get_stats64 = vmxnet3_get_stats64,
3237 .ndo_tx_timeout = vmxnet3_tx_timeout,
3238 .ndo_set_rx_mode = vmxnet3_set_mc,
3239 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
3240 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
3241 #ifdef CONFIG_NET_POLL_CONTROLLER
3242 .ndo_poll_controller = vmxnet3_netpoll,
3243 #endif
3244 };
3245 int err;
3246 bool dma64 = false; /* stupid gcc */
3247 u32 ver;
3248 struct net_device *netdev;
3249 struct vmxnet3_adapter *adapter;
3250 u8 mac[ETH_ALEN];
3251 int size;
3252 int num_tx_queues;
3253 int num_rx_queues;
3254
3255 if (!pci_msi_enabled())
3256 enable_mq = 0;
3257
3258 #ifdef VMXNET3_RSS
3259 if (enable_mq)
3260 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3261 (int)num_online_cpus());
3262 else
3263 #endif
3264 num_rx_queues = 1;
3265 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3266
3267 if (enable_mq)
3268 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
3269 (int)num_online_cpus());
3270 else
3271 num_tx_queues = 1;
3272
3273 num_tx_queues = rounddown_pow_of_two(num_tx_queues);
3274 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
3275 max(num_tx_queues, num_rx_queues));
3276 dev_info(&pdev->dev,
3277 "# of Tx queues : %d, # of Rx queues : %d\n",
3278 num_tx_queues, num_rx_queues);
3279
3280 if (!netdev)
3281 return -ENOMEM;
3282
3283 pci_set_drvdata(pdev, netdev);
3284 adapter = netdev_priv(netdev);
3285 adapter->netdev = netdev;
3286 adapter->pdev = pdev;
3287
3288 adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
3289 adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
3290 adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
3291
3292 spin_lock_init(&adapter->cmd_lock);
3293 adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
3294 sizeof(struct vmxnet3_adapter),
3295 PCI_DMA_TODEVICE);
3296 if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) {
3297 dev_err(&pdev->dev, "Failed to map dma\n");
3298 err = -EFAULT;
3299 goto err_dma_map;
3300 }
3301 adapter->shared = dma_alloc_coherent(
3302 &adapter->pdev->dev,
3303 sizeof(struct Vmxnet3_DriverShared),
3304 &adapter->shared_pa, GFP_KERNEL);
3305 if (!adapter->shared) {
3306 dev_err(&pdev->dev, "Failed to allocate memory\n");
3307 err = -ENOMEM;
3308 goto err_alloc_shared;
3309 }
3310
3311 adapter->num_rx_queues = num_rx_queues;
3312 adapter->num_tx_queues = num_tx_queues;
3313 adapter->rx_buf_per_pkt = 1;
3314
3315 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3316 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3317 adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3318 &adapter->queue_desc_pa,
3319 GFP_KERNEL);
3320
3321 if (!adapter->tqd_start) {
3322 dev_err(&pdev->dev, "Failed to allocate memory\n");
3323 err = -ENOMEM;
3324 goto err_alloc_queue_desc;
3325 }
3326 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3327 adapter->num_tx_queues);
3328
3329 adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3330 sizeof(struct Vmxnet3_PMConf),
3331 &adapter->pm_conf_pa,
3332 GFP_KERNEL);
3333 if (adapter->pm_conf == NULL) {
3334 err = -ENOMEM;
3335 goto err_alloc_pm;
3336 }
3337
3338 #ifdef VMXNET3_RSS
3339
3340 adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
3341 sizeof(struct UPT1_RSSConf),
3342 &adapter->rss_conf_pa,
3343 GFP_KERNEL);
3344 if (adapter->rss_conf == NULL) {
3345 err = -ENOMEM;
3346 goto err_alloc_rss;
3347 }
3348 #endif /* VMXNET3_RSS */
3349
3350 err = vmxnet3_alloc_pci_resources(adapter, &dma64);
3351 if (err < 0)
3352 goto err_alloc_pci;
3353
3354 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3355 if (ver & (1 << VMXNET3_REV_3)) {
3356 VMXNET3_WRITE_BAR1_REG(adapter,
3357 VMXNET3_REG_VRRS,
3358 1 << VMXNET3_REV_3);
3359 adapter->version = VMXNET3_REV_3 + 1;
3360 } else if (ver & (1 << VMXNET3_REV_2)) {
3361 VMXNET3_WRITE_BAR1_REG(adapter,
3362 VMXNET3_REG_VRRS,
3363 1 << VMXNET3_REV_2);
3364 adapter->version = VMXNET3_REV_2 + 1;
3365 } else if (ver & (1 << VMXNET3_REV_1)) {
3366 VMXNET3_WRITE_BAR1_REG(adapter,
3367 VMXNET3_REG_VRRS,
3368 1 << VMXNET3_REV_1);
3369 adapter->version = VMXNET3_REV_1 + 1;
3370 } else {
3371 dev_err(&pdev->dev,
3372 "Incompatible h/w version (0x%x) for adapter\n", ver);
3373 err = -EBUSY;
3374 goto err_ver;
3375 }
3376 dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version);
3377
3378 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3379 if (ver & 1) {
3380 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3381 } else {
3382 dev_err(&pdev->dev,
3383 "Incompatible upt version (0x%x) for adapter\n", ver);
3384 err = -EBUSY;
3385 goto err_ver;
3386 }
3387
3388 if (VMXNET3_VERSION_GE_3(adapter)) {
3389 adapter->coal_conf =
3390 dma_alloc_coherent(&adapter->pdev->dev,
3391 sizeof(struct Vmxnet3_CoalesceScheme)
3392 ,
3393 &adapter->coal_conf_pa,
3394 GFP_KERNEL);
3395 if (!adapter->coal_conf) {
3396 err = -ENOMEM;
3397 goto err_ver;
3398 }
3399 memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
3400 adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
3401 adapter->default_coal_mode = true;
3402 }
3403
3404 SET_NETDEV_DEV(netdev, &pdev->dev);
3405 vmxnet3_declare_features(adapter, dma64);
3406
3407 adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
3408 VMXNET3_DEF_RXDATA_DESC_SIZE : 0;
3409
3410 if (adapter->num_tx_queues == adapter->num_rx_queues)
3411 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
3412 else
3413 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3414
3415 vmxnet3_alloc_intr_resources(adapter);
3416
3417 #ifdef VMXNET3_RSS
3418 if (adapter->num_rx_queues > 1 &&
3419 adapter->intr.type == VMXNET3_IT_MSIX) {
3420 adapter->rss = true;
3421 netdev->hw_features |= NETIF_F_RXHASH;
3422 netdev->features |= NETIF_F_RXHASH;
3423 dev_dbg(&pdev->dev, "RSS is enabled.\n");
3424 } else {
3425 adapter->rss = false;
3426 }
3427 #endif
3428
3429 vmxnet3_read_mac_addr(adapter, mac);
3430 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3431
3432 netdev->netdev_ops = &vmxnet3_netdev_ops;
3433 vmxnet3_set_ethtool_ops(netdev);
3434 netdev->watchdog_timeo = 5 * HZ;
3435
3436 /* MTU range: 60 - 9000 */
3437 netdev->min_mtu = VMXNET3_MIN_MTU;
3438 netdev->max_mtu = VMXNET3_MAX_MTU;
3439
3440 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3441 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3442
3443 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3444 int i;
3445 for (i = 0; i < adapter->num_rx_queues; i++) {
3446 netif_napi_add(adapter->netdev,
3447 &adapter->rx_queue[i].napi,
3448 vmxnet3_poll_rx_only, 64);
3449 }
3450 } else {
3451 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3452 vmxnet3_poll, 64);
3453 }
3454
3455 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3456 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3457
3458 netif_carrier_off(netdev);
3459 err = register_netdev(netdev);
3460
3461 if (err) {
3462 dev_err(&pdev->dev, "Failed to register adapter\n");
3463 goto err_register;
3464 }
3465
3466 vmxnet3_check_link(adapter, false);
3467 return 0;
3468
3469 err_register:
3470 if (VMXNET3_VERSION_GE_3(adapter)) {
3471 dma_free_coherent(&adapter->pdev->dev,
3472 sizeof(struct Vmxnet3_CoalesceScheme),
3473 adapter->coal_conf, adapter->coal_conf_pa);
3474 }
3475 vmxnet3_free_intr_resources(adapter);
3476 err_ver:
3477 vmxnet3_free_pci_resources(adapter);
3478 err_alloc_pci:
3479 #ifdef VMXNET3_RSS
3480 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3481 adapter->rss_conf, adapter->rss_conf_pa);
3482 err_alloc_rss:
3483 #endif
3484 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3485 adapter->pm_conf, adapter->pm_conf_pa);
3486 err_alloc_pm:
3487 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3488 adapter->queue_desc_pa);
3489 err_alloc_queue_desc:
3490 dma_free_coherent(&adapter->pdev->dev,
3491 sizeof(struct Vmxnet3_DriverShared),
3492 adapter->shared, adapter->shared_pa);
3493 err_alloc_shared:
3494 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3495 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3496 err_dma_map:
3497 free_netdev(netdev);
3498 return err;
3499 }
3500
3501
3502 static void
3503 vmxnet3_remove_device(struct pci_dev *pdev)
3504 {
3505 struct net_device *netdev = pci_get_drvdata(pdev);
3506 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3507 int size = 0;
3508 int num_rx_queues;
3509
3510 #ifdef VMXNET3_RSS
3511 if (enable_mq)
3512 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3513 (int)num_online_cpus());
3514 else
3515 #endif
3516 num_rx_queues = 1;
3517 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3518
3519 cancel_work_sync(&adapter->work);
3520
3521 unregister_netdev(netdev);
3522
3523 vmxnet3_free_intr_resources(adapter);
3524 vmxnet3_free_pci_resources(adapter);
3525 if (VMXNET3_VERSION_GE_3(adapter)) {
3526 dma_free_coherent(&adapter->pdev->dev,
3527 sizeof(struct Vmxnet3_CoalesceScheme),
3528 adapter->coal_conf, adapter->coal_conf_pa);
3529 }
3530 #ifdef VMXNET3_RSS
3531 dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3532 adapter->rss_conf, adapter->rss_conf_pa);
3533 #endif
3534 dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3535 adapter->pm_conf, adapter->pm_conf_pa);
3536
3537 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3538 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3539 dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3540 adapter->queue_desc_pa);
3541 dma_free_coherent(&adapter->pdev->dev,
3542 sizeof(struct Vmxnet3_DriverShared),
3543 adapter->shared, adapter->shared_pa);
3544 dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3545 sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3546 free_netdev(netdev);
3547 }
3548
3549 static void vmxnet3_shutdown_device(struct pci_dev *pdev)
3550 {
3551 struct net_device *netdev = pci_get_drvdata(pdev);
3552 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3553 unsigned long flags;
3554
3555 /* Reset_work may be in the middle of resetting the device, wait for its
3556 * completion.
3557 */
3558 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3559 msleep(1);
3560
3561 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED,
3562 &adapter->state)) {
3563 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3564 return;
3565 }
3566 spin_lock_irqsave(&adapter->cmd_lock, flags);
3567 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3568 VMXNET3_CMD_QUIESCE_DEV);
3569 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3570 vmxnet3_disable_all_intrs(adapter);
3571
3572 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3573 }
3574
3575
3576 #ifdef CONFIG_PM
3577
3578 static int
3579 vmxnet3_suspend(struct device *device)
3580 {
3581 struct pci_dev *pdev = to_pci_dev(device);
3582 struct net_device *netdev = pci_get_drvdata(pdev);
3583 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3584 struct Vmxnet3_PMConf *pmConf;
3585 struct ethhdr *ehdr;
3586 struct arphdr *ahdr;
3587 u8 *arpreq;
3588 struct in_device *in_dev;
3589 struct in_ifaddr *ifa;
3590 unsigned long flags;
3591 int i = 0;
3592
3593 if (!netif_running(netdev))
3594 return 0;
3595
3596 for (i = 0; i < adapter->num_rx_queues; i++)
3597 napi_disable(&adapter->rx_queue[i].napi);
3598
3599 vmxnet3_disable_all_intrs(adapter);
3600 vmxnet3_free_irqs(adapter);
3601 vmxnet3_free_intr_resources(adapter);
3602
3603 netif_device_detach(netdev);
3604 netif_tx_stop_all_queues(netdev);
3605
3606 /* Create wake-up filters. */
3607 pmConf = adapter->pm_conf;
3608 memset(pmConf, 0, sizeof(*pmConf));
3609
3610 if (adapter->wol & WAKE_UCAST) {
3611 pmConf->filters[i].patternSize = ETH_ALEN;
3612 pmConf->filters[i].maskSize = 1;
3613 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3614 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3615
3616 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3617 i++;
3618 }
3619
3620 if (adapter->wol & WAKE_ARP) {
3621 in_dev = in_dev_get(netdev);
3622 if (!in_dev)
3623 goto skip_arp;
3624
3625 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3626 if (!ifa)
3627 goto skip_arp;
3628
3629 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3630 sizeof(struct arphdr) + /* ARP header */
3631 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3632 2 * sizeof(u32); /*2 IPv4 addresses */
3633 pmConf->filters[i].maskSize =
3634 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3635
3636 /* ETH_P_ARP in Ethernet header. */
3637 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3638 ehdr->h_proto = htons(ETH_P_ARP);
3639
3640 /* ARPOP_REQUEST in ARP header. */
3641 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3642 ahdr->ar_op = htons(ARPOP_REQUEST);
3643 arpreq = (u8 *)(ahdr + 1);
3644
3645 /* The Unicast IPv4 address in 'tip' field. */
3646 arpreq += 2 * ETH_ALEN + sizeof(u32);
3647 *(u32 *)arpreq = ifa->ifa_address;
3648
3649 /* The mask for the relevant bits. */
3650 pmConf->filters[i].mask[0] = 0x00;
3651 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3652 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3653 pmConf->filters[i].mask[3] = 0x00;
3654 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3655 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3656 in_dev_put(in_dev);
3657
3658 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3659 i++;
3660 }
3661
3662 skip_arp:
3663 if (adapter->wol & WAKE_MAGIC)
3664 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3665
3666 pmConf->numFilters = i;
3667
3668 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3669 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3670 *pmConf));
3671 adapter->shared->devRead.pmConfDesc.confPA =
3672 cpu_to_le64(adapter->pm_conf_pa);
3673
3674 spin_lock_irqsave(&adapter->cmd_lock, flags);
3675 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3676 VMXNET3_CMD_UPDATE_PMCFG);
3677 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3678
3679 pci_save_state(pdev);
3680 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3681 adapter->wol);
3682 pci_disable_device(pdev);
3683 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3684
3685 return 0;
3686 }
3687
3688
3689 static int
3690 vmxnet3_resume(struct device *device)
3691 {
3692 int err;
3693 unsigned long flags;
3694 struct pci_dev *pdev = to_pci_dev(device);
3695 struct net_device *netdev = pci_get_drvdata(pdev);
3696 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3697
3698 if (!netif_running(netdev))
3699 return 0;
3700
3701 pci_set_power_state(pdev, PCI_D0);
3702 pci_restore_state(pdev);
3703 err = pci_enable_device_mem(pdev);
3704 if (err != 0)
3705 return err;
3706
3707 pci_enable_wake(pdev, PCI_D0, 0);
3708
3709 vmxnet3_alloc_intr_resources(adapter);
3710
3711 /* During hibernate and suspend, device has to be reinitialized as the
3712 * device state need not be preserved.
3713 */
3714
3715 /* Need not check adapter state as other reset tasks cannot run during
3716 * device resume.
3717 */
3718 spin_lock_irqsave(&adapter->cmd_lock, flags);
3719 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3720 VMXNET3_CMD_QUIESCE_DEV);
3721 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3722 vmxnet3_tq_cleanup_all(adapter);
3723 vmxnet3_rq_cleanup_all(adapter);
3724
3725 vmxnet3_reset_dev(adapter);
3726 err = vmxnet3_activate_dev(adapter);
3727 if (err != 0) {
3728 netdev_err(netdev,
3729 "failed to re-activate on resume, error: %d", err);
3730 vmxnet3_force_close(adapter);
3731 return err;
3732 }
3733 netif_device_attach(netdev);
3734
3735 return 0;
3736 }
3737
3738 static const struct dev_pm_ops vmxnet3_pm_ops = {
3739 .suspend = vmxnet3_suspend,
3740 .resume = vmxnet3_resume,
3741 .freeze = vmxnet3_suspend,
3742 .restore = vmxnet3_resume,
3743 };
3744 #endif
3745
3746 static struct pci_driver vmxnet3_driver = {
3747 .name = vmxnet3_driver_name,
3748 .id_table = vmxnet3_pciid_table,
3749 .probe = vmxnet3_probe_device,
3750 .remove = vmxnet3_remove_device,
3751 .shutdown = vmxnet3_shutdown_device,
3752 #ifdef CONFIG_PM
3753 .driver.pm = &vmxnet3_pm_ops,
3754 #endif
3755 };
3756
3757
3758 static int __init
3759 vmxnet3_init_module(void)
3760 {
3761 pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
3762 VMXNET3_DRIVER_VERSION_REPORT);
3763 return pci_register_driver(&vmxnet3_driver);
3764 }
3765
3766 module_init(vmxnet3_init_module);
3767
3768
3769 static void
3770 vmxnet3_exit_module(void)
3771 {
3772 pci_unregister_driver(&vmxnet3_driver);
3773 }
3774
3775 module_exit(vmxnet3_exit_module);
3776
3777 MODULE_AUTHOR("VMware, Inc.");
3778 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3779 MODULE_LICENSE("GPL v2");
3780 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
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