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IPVS: fix netns if reading ip_vs_* procfs entries
[linux-2.6/linux-mips.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
blobc16ed961153a7705ff742a6212c7e322d28f76fd
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * The full GNU General Public License is included in this distribution in
21 * the file called "COPYING".
22 *
23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24 *
25 */
26
27 #include <net/ip6_checksum.h>
28
29 #include "vmxnet3_int.h"
30
31 char vmxnet3_driver_name[] = "vmxnet3";
32 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
33
34 /*
35 * PCI Device ID Table
36 * Last entry must be all 0s
37 */
38 static DEFINE_PCI_DEVICE_TABLE(vmxnet3_pciid_table) = {
39 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
40 {0}
41 };
42
43 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
44
45 static atomic_t devices_found;
46
47 #define VMXNET3_MAX_DEVICES 10
48 static int enable_mq = 1;
49 static int irq_share_mode;
50
51 static void
52 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
53
54 /*
55 * Enable/Disable the given intr
56 */
57 static void
58 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
59 {
60 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
61 }
62
63
64 static void
65 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
66 {
67 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
68 }
69
70
71 /*
72 * Enable/Disable all intrs used by the device
73 */
74 static void
75 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
76 {
77 int i;
78
79 for (i = 0; i < adapter->intr.num_intrs; i++)
80 vmxnet3_enable_intr(adapter, i);
81 adapter->shared->devRead.intrConf.intrCtrl &=
82 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
83 }
84
85
86 static void
87 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
88 {
89 int i;
90
91 adapter->shared->devRead.intrConf.intrCtrl |=
92 cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
93 for (i = 0; i < adapter->intr.num_intrs; i++)
94 vmxnet3_disable_intr(adapter, i);
95 }
96
97
98 static void
99 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
100 {
101 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
102 }
103
104
105 static bool
106 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
107 {
108 return tq->stopped;
109 }
110
111
112 static void
113 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
114 {
115 tq->stopped = false;
116 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
117 }
118
119
120 static void
121 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
122 {
123 tq->stopped = false;
124 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
125 }
126
127
128 static void
129 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
130 {
131 tq->stopped = true;
132 tq->num_stop++;
133 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
134 }
135
136
137 /*
138 * Check the link state. This may start or stop the tx queue.
139 */
140 static void
141 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
142 {
143 u32 ret;
144 int i;
145 unsigned long flags;
146
147 spin_lock_irqsave(&adapter->cmd_lock, flags);
148 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
149 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
150 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
151
152 adapter->link_speed = ret >> 16;
153 if (ret & 1) { /* Link is up. */
154 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n",
155 adapter->netdev->name, adapter->link_speed);
156 if (!netif_carrier_ok(adapter->netdev))
157 netif_carrier_on(adapter->netdev);
158
159 if (affectTxQueue) {
160 for (i = 0; i < adapter->num_tx_queues; i++)
161 vmxnet3_tq_start(&adapter->tx_queue[i],
162 adapter);
163 }
164 } else {
165 printk(KERN_INFO "%s: NIC Link is Down\n",
166 adapter->netdev->name);
167 if (netif_carrier_ok(adapter->netdev))
168 netif_carrier_off(adapter->netdev);
169
170 if (affectTxQueue) {
171 for (i = 0; i < adapter->num_tx_queues; i++)
172 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
173 }
174 }
175 }
176
177 static void
178 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
179 {
180 int i;
181 unsigned long flags;
182 u32 events = le32_to_cpu(adapter->shared->ecr);
183 if (!events)
184 return;
185
186 vmxnet3_ack_events(adapter, events);
187
188 /* Check if link state has changed */
189 if (events & VMXNET3_ECR_LINK)
190 vmxnet3_check_link(adapter, true);
191
192 /* Check if there is an error on xmit/recv queues */
193 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
194 spin_lock_irqsave(&adapter->cmd_lock, flags);
195 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
196 VMXNET3_CMD_GET_QUEUE_STATUS);
197 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
198
199 for (i = 0; i < adapter->num_tx_queues; i++)
200 if (adapter->tqd_start[i].status.stopped)
201 dev_err(&adapter->netdev->dev,
202 "%s: tq[%d] error 0x%x\n",
203 adapter->netdev->name, i, le32_to_cpu(
204 adapter->tqd_start[i].status.error));
205 for (i = 0; i < adapter->num_rx_queues; i++)
206 if (adapter->rqd_start[i].status.stopped)
207 dev_err(&adapter->netdev->dev,
208 "%s: rq[%d] error 0x%x\n",
209 adapter->netdev->name, i,
210 adapter->rqd_start[i].status.error);
211
212 schedule_work(&adapter->work);
213 }
214 }
215
216 #ifdef __BIG_ENDIAN_BITFIELD
217 /*
218 * The device expects the bitfields in shared structures to be written in
219 * little endian. When CPU is big endian, the following routines are used to
220 * correctly read and write into ABI.
221 * The general technique used here is : double word bitfields are defined in
222 * opposite order for big endian architecture. Then before reading them in
223 * driver the complete double word is translated using le32_to_cpu. Similarly
224 * After the driver writes into bitfields, cpu_to_le32 is used to translate the
225 * double words into required format.
226 * In order to avoid touching bits in shared structure more than once, temporary
227 * descriptors are used. These are passed as srcDesc to following functions.
228 */
229 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
230 struct Vmxnet3_RxDesc *dstDesc)
231 {
232 u32 *src = (u32 *)srcDesc + 2;
233 u32 *dst = (u32 *)dstDesc + 2;
234 dstDesc->addr = le64_to_cpu(srcDesc->addr);
235 *dst = le32_to_cpu(*src);
236 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
237 }
238
239 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
240 struct Vmxnet3_TxDesc *dstDesc)
241 {
242 int i;
243 u32 *src = (u32 *)(srcDesc + 1);
244 u32 *dst = (u32 *)(dstDesc + 1);
245
246 /* Working backwards so that the gen bit is set at the end. */
247 for (i = 2; i > 0; i--) {
248 src--;
249 dst--;
250 *dst = cpu_to_le32(*src);
251 }
252 }
253
254
255 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
256 struct Vmxnet3_RxCompDesc *dstDesc)
257 {
258 int i = 0;
259 u32 *src = (u32 *)srcDesc;
260 u32 *dst = (u32 *)dstDesc;
261 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
262 *dst = le32_to_cpu(*src);
263 src++;
264 dst++;
265 }
266 }
267
268
269 /* Used to read bitfield values from double words. */
270 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
271 {
272 u32 temp = le32_to_cpu(*bitfield);
273 u32 mask = ((1 << size) - 1) << pos;
274 temp &= mask;
275 temp >>= pos;
276 return temp;
277 }
278
279
280
281 #endif /* __BIG_ENDIAN_BITFIELD */
282
283 #ifdef __BIG_ENDIAN_BITFIELD
284
285 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
286 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
287 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
288 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
289 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
290 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
291 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
292 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
293 VMXNET3_TCD_GEN_SIZE)
294 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
295 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
296 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
297 (dstrcd) = (tmp); \
298 vmxnet3_RxCompToCPU((rcd), (tmp)); \
299 } while (0)
300 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
301 (dstrxd) = (tmp); \
302 vmxnet3_RxDescToCPU((rxd), (tmp)); \
303 } while (0)
304
305 #else
306
307 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
308 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
309 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
310 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
311 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
312 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
313
314 #endif /* __BIG_ENDIAN_BITFIELD */
315
316
317 static void
318 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
319 struct pci_dev *pdev)
320 {
321 if (tbi->map_type == VMXNET3_MAP_SINGLE)
322 pci_unmap_single(pdev, tbi->dma_addr, tbi->len,
323 PCI_DMA_TODEVICE);
324 else if (tbi->map_type == VMXNET3_MAP_PAGE)
325 pci_unmap_page(pdev, tbi->dma_addr, tbi->len,
326 PCI_DMA_TODEVICE);
327 else
328 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
329
330 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
331 }
332
333
334 static int
335 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
336 struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
337 {
338 struct sk_buff *skb;
339 int entries = 0;
340
341 /* no out of order completion */
342 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
343 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
344
345 skb = tq->buf_info[eop_idx].skb;
346 BUG_ON(skb == NULL);
347 tq->buf_info[eop_idx].skb = NULL;
348
349 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
350
351 while (tq->tx_ring.next2comp != eop_idx) {
352 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
353 pdev);
354
355 /* update next2comp w/o tx_lock. Since we are marking more,
356 * instead of less, tx ring entries avail, the worst case is
357 * that the tx routine incorrectly re-queues a pkt due to
358 * insufficient tx ring entries.
359 */
360 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
361 entries++;
362 }
363
364 dev_kfree_skb_any(skb);
365 return entries;
366 }
367
368
369 static int
370 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
371 struct vmxnet3_adapter *adapter)
372 {
373 int completed = 0;
374 union Vmxnet3_GenericDesc *gdesc;
375
376 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
377 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
378 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
379 &gdesc->tcd), tq, adapter->pdev,
380 adapter);
381
382 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
383 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
384 }
385
386 if (completed) {
387 spin_lock(&tq->tx_lock);
388 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
389 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
390 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
391 netif_carrier_ok(adapter->netdev))) {
392 vmxnet3_tq_wake(tq, adapter);
393 }
394 spin_unlock(&tq->tx_lock);
395 }
396 return completed;
397 }
398
399
400 static void
401 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
402 struct vmxnet3_adapter *adapter)
403 {
404 int i;
405
406 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
407 struct vmxnet3_tx_buf_info *tbi;
408 union Vmxnet3_GenericDesc *gdesc;
409
410 tbi = tq->buf_info + tq->tx_ring.next2comp;
411 gdesc = tq->tx_ring.base + tq->tx_ring.next2comp;
412
413 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
414 if (tbi->skb) {
415 dev_kfree_skb_any(tbi->skb);
416 tbi->skb = NULL;
417 }
418 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
419 }
420
421 /* sanity check, verify all buffers are indeed unmapped and freed */
422 for (i = 0; i < tq->tx_ring.size; i++) {
423 BUG_ON(tq->buf_info[i].skb != NULL ||
424 tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
425 }
426
427 tq->tx_ring.gen = VMXNET3_INIT_GEN;
428 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
429
430 tq->comp_ring.gen = VMXNET3_INIT_GEN;
431 tq->comp_ring.next2proc = 0;
432 }
433
434
435 static void
436 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
437 struct vmxnet3_adapter *adapter)
438 {
439 if (tq->tx_ring.base) {
440 pci_free_consistent(adapter->pdev, tq->tx_ring.size *
441 sizeof(struct Vmxnet3_TxDesc),
442 tq->tx_ring.base, tq->tx_ring.basePA);
443 tq->tx_ring.base = NULL;
444 }
445 if (tq->data_ring.base) {
446 pci_free_consistent(adapter->pdev, tq->data_ring.size *
447 sizeof(struct Vmxnet3_TxDataDesc),
448 tq->data_ring.base, tq->data_ring.basePA);
449 tq->data_ring.base = NULL;
450 }
451 if (tq->comp_ring.base) {
452 pci_free_consistent(adapter->pdev, tq->comp_ring.size *
453 sizeof(struct Vmxnet3_TxCompDesc),
454 tq->comp_ring.base, tq->comp_ring.basePA);
455 tq->comp_ring.base = NULL;
456 }
457 kfree(tq->buf_info);
458 tq->buf_info = NULL;
459 }
460
461
462 /* Destroy all tx queues */
463 void
464 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
465 {
466 int i;
467
468 for (i = 0; i < adapter->num_tx_queues; i++)
469 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
470 }
471
472
473 static void
474 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
475 struct vmxnet3_adapter *adapter)
476 {
477 int i;
478
479 /* reset the tx ring contents to 0 and reset the tx ring states */
480 memset(tq->tx_ring.base, 0, tq->tx_ring.size *
481 sizeof(struct Vmxnet3_TxDesc));
482 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
483 tq->tx_ring.gen = VMXNET3_INIT_GEN;
484
485 memset(tq->data_ring.base, 0, tq->data_ring.size *
486 sizeof(struct Vmxnet3_TxDataDesc));
487
488 /* reset the tx comp ring contents to 0 and reset comp ring states */
489 memset(tq->comp_ring.base, 0, tq->comp_ring.size *
490 sizeof(struct Vmxnet3_TxCompDesc));
491 tq->comp_ring.next2proc = 0;
492 tq->comp_ring.gen = VMXNET3_INIT_GEN;
493
494 /* reset the bookkeeping data */
495 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
496 for (i = 0; i < tq->tx_ring.size; i++)
497 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
498
499 /* stats are not reset */
500 }
501
502
503 static int
504 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
505 struct vmxnet3_adapter *adapter)
506 {
507 BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
508 tq->comp_ring.base || tq->buf_info);
509
510 tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size
511 * sizeof(struct Vmxnet3_TxDesc),
512 &tq->tx_ring.basePA);
513 if (!tq->tx_ring.base) {
514 printk(KERN_ERR "%s: failed to allocate tx ring\n",
515 adapter->netdev->name);
516 goto err;
517 }
518
519 tq->data_ring.base = pci_alloc_consistent(adapter->pdev,
520 tq->data_ring.size *
521 sizeof(struct Vmxnet3_TxDataDesc),
522 &tq->data_ring.basePA);
523 if (!tq->data_ring.base) {
524 printk(KERN_ERR "%s: failed to allocate data ring\n",
525 adapter->netdev->name);
526 goto err;
527 }
528
529 tq->comp_ring.base = pci_alloc_consistent(adapter->pdev,
530 tq->comp_ring.size *
531 sizeof(struct Vmxnet3_TxCompDesc),
532 &tq->comp_ring.basePA);
533 if (!tq->comp_ring.base) {
534 printk(KERN_ERR "%s: failed to allocate tx comp ring\n",
535 adapter->netdev->name);
536 goto err;
537 }
538
539 tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]),
540 GFP_KERNEL);
541 if (!tq->buf_info) {
542 printk(KERN_ERR "%s: failed to allocate tx bufinfo\n",
543 adapter->netdev->name);
544 goto err;
545 }
546
547 return 0;
548
549 err:
550 vmxnet3_tq_destroy(tq, adapter);
551 return -ENOMEM;
552 }
553
554 static void
555 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
556 {
557 int i;
558
559 for (i = 0; i < adapter->num_tx_queues; i++)
560 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
561 }
562
563 /*
564 * starting from ring->next2fill, allocate rx buffers for the given ring
565 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
566 * are allocated or allocation fails
567 */
568
569 static int
570 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
571 int num_to_alloc, struct vmxnet3_adapter *adapter)
572 {
573 int num_allocated = 0;
574 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
575 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
576 u32 val;
577
578 while (num_allocated < num_to_alloc) {
579 struct vmxnet3_rx_buf_info *rbi;
580 union Vmxnet3_GenericDesc *gd;
581
582 rbi = rbi_base + ring->next2fill;
583 gd = ring->base + ring->next2fill;
584
585 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
586 if (rbi->skb == NULL) {
587 rbi->skb = dev_alloc_skb(rbi->len +
588 NET_IP_ALIGN);
589 if (unlikely(rbi->skb == NULL)) {
590 rq->stats.rx_buf_alloc_failure++;
591 break;
592 }
593 rbi->skb->dev = adapter->netdev;
594
595 skb_reserve(rbi->skb, NET_IP_ALIGN);
596 rbi->dma_addr = pci_map_single(adapter->pdev,
597 rbi->skb->data, rbi->len,
598 PCI_DMA_FROMDEVICE);
599 } else {
600 /* rx buffer skipped by the device */
601 }
602 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
603 } else {
604 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
605 rbi->len != PAGE_SIZE);
606
607 if (rbi->page == NULL) {
608 rbi->page = alloc_page(GFP_ATOMIC);
609 if (unlikely(rbi->page == NULL)) {
610 rq->stats.rx_buf_alloc_failure++;
611 break;
612 }
613 rbi->dma_addr = pci_map_page(adapter->pdev,
614 rbi->page, 0, PAGE_SIZE,
615 PCI_DMA_FROMDEVICE);
616 } else {
617 /* rx buffers skipped by the device */
618 }
619 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
620 }
621
622 BUG_ON(rbi->dma_addr == 0);
623 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
624 gd->dword[2] = cpu_to_le32((ring->gen << VMXNET3_RXD_GEN_SHIFT)
625 | val | rbi->len);
626
627 num_allocated++;
628 vmxnet3_cmd_ring_adv_next2fill(ring);
629 }
630 rq->uncommitted[ring_idx] += num_allocated;
631
632 dev_dbg(&adapter->netdev->dev,
633 "alloc_rx_buf: %d allocated, next2fill %u, next2comp "
634 "%u, uncommited %u\n", num_allocated, ring->next2fill,
635 ring->next2comp, rq->uncommitted[ring_idx]);
636
637 /* so that the device can distinguish a full ring and an empty ring */
638 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
639
640 return num_allocated;
641 }
642
643
644 static void
645 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
646 struct vmxnet3_rx_buf_info *rbi)
647 {
648 struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
649 skb_shinfo(skb)->nr_frags;
650
651 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
652
653 frag->page = rbi->page;
654 frag->page_offset = 0;
655 frag->size = rcd->len;
656 skb->data_len += frag->size;
657 skb_shinfo(skb)->nr_frags++;
658 }
659
660
661 static void
662 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
663 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
664 struct vmxnet3_adapter *adapter)
665 {
666 u32 dw2, len;
667 unsigned long buf_offset;
668 int i;
669 union Vmxnet3_GenericDesc *gdesc;
670 struct vmxnet3_tx_buf_info *tbi = NULL;
671
672 BUG_ON(ctx->copy_size > skb_headlen(skb));
673
674 /* use the previous gen bit for the SOP desc */
675 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
676
677 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
678 gdesc = ctx->sop_txd; /* both loops below can be skipped */
679
680 /* no need to map the buffer if headers are copied */
681 if (ctx->copy_size) {
682 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
683 tq->tx_ring.next2fill *
684 sizeof(struct Vmxnet3_TxDataDesc));
685 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
686 ctx->sop_txd->dword[3] = 0;
687
688 tbi = tq->buf_info + tq->tx_ring.next2fill;
689 tbi->map_type = VMXNET3_MAP_NONE;
690
691 dev_dbg(&adapter->netdev->dev,
692 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
693 tq->tx_ring.next2fill,
694 le64_to_cpu(ctx->sop_txd->txd.addr),
695 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
696 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
697
698 /* use the right gen for non-SOP desc */
699 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
700 }
701
702 /* linear part can use multiple tx desc if it's big */
703 len = skb_headlen(skb) - ctx->copy_size;
704 buf_offset = ctx->copy_size;
705 while (len) {
706 u32 buf_size;
707
708 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
709 buf_size = len;
710 dw2 |= len;
711 } else {
712 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
713 /* spec says that for TxDesc.len, 0 == 2^14 */
714 }
715
716 tbi = tq->buf_info + tq->tx_ring.next2fill;
717 tbi->map_type = VMXNET3_MAP_SINGLE;
718 tbi->dma_addr = pci_map_single(adapter->pdev,
719 skb->data + buf_offset, buf_size,
720 PCI_DMA_TODEVICE);
721
722 tbi->len = buf_size;
723
724 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
725 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
726
727 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
728 gdesc->dword[2] = cpu_to_le32(dw2);
729 gdesc->dword[3] = 0;
730
731 dev_dbg(&adapter->netdev->dev,
732 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
733 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
734 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
735 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
736 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
737
738 len -= buf_size;
739 buf_offset += buf_size;
740 }
741
742 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
743 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
744
745 tbi = tq->buf_info + tq->tx_ring.next2fill;
746 tbi->map_type = VMXNET3_MAP_PAGE;
747 tbi->dma_addr = pci_map_page(adapter->pdev, frag->page,
748 frag->page_offset, frag->size,
749 PCI_DMA_TODEVICE);
750
751 tbi->len = frag->size;
752
753 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
754 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
755
756 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
757 gdesc->dword[2] = cpu_to_le32(dw2 | frag->size);
758 gdesc->dword[3] = 0;
759
760 dev_dbg(&adapter->netdev->dev,
761 "txd[%u]: 0x%llu %u %u\n",
762 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
763 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
764 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
765 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
766 }
767
768 ctx->eop_txd = gdesc;
769
770 /* set the last buf_info for the pkt */
771 tbi->skb = skb;
772 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
773 }
774
775
776 /* Init all tx queues */
777 static void
778 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
779 {
780 int i;
781
782 for (i = 0; i < adapter->num_tx_queues; i++)
783 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
784 }
785
786
787 /*
788 * parse and copy relevant protocol headers:
789 * For a tso pkt, relevant headers are L2/3/4 including options
790 * For a pkt requesting csum offloading, they are L2/3 and may include L4
791 * if it's a TCP/UDP pkt
792 *
793 * Returns:
794 * -1: error happens during parsing
795 * 0: protocol headers parsed, but too big to be copied
796 * 1: protocol headers parsed and copied
797 *
798 * Other effects:
799 * 1. related *ctx fields are updated.
800 * 2. ctx->copy_size is # of bytes copied
801 * 3. the portion copied is guaranteed to be in the linear part
802 *
803 */
804 static int
805 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
806 struct vmxnet3_tx_ctx *ctx,
807 struct vmxnet3_adapter *adapter)
808 {
809 struct Vmxnet3_TxDataDesc *tdd;
810
811 if (ctx->mss) { /* TSO */
812 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
813 ctx->l4_hdr_size = ((struct tcphdr *)
814 skb_transport_header(skb))->doff * 4;
815 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
816 } else {
817 if (skb->ip_summed == CHECKSUM_PARTIAL) {
818 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
819
820 if (ctx->ipv4) {
821 struct iphdr *iph = (struct iphdr *)
822 skb_network_header(skb);
823 if (iph->protocol == IPPROTO_TCP)
824 ctx->l4_hdr_size = ((struct tcphdr *)
825 skb_transport_header(skb))->doff * 4;
826 else if (iph->protocol == IPPROTO_UDP)
827 /*
828 * Use tcp header size so that bytes to
829 * be copied are more than required by
830 * the device.
831 */
832 ctx->l4_hdr_size =
833 sizeof(struct tcphdr);
834 else
835 ctx->l4_hdr_size = 0;
836 } else {
837 /* for simplicity, don't copy L4 headers */
838 ctx->l4_hdr_size = 0;
839 }
840 ctx->copy_size = ctx->eth_ip_hdr_size +
841 ctx->l4_hdr_size;
842 } else {
843 ctx->eth_ip_hdr_size = 0;
844 ctx->l4_hdr_size = 0;
845 /* copy as much as allowed */
846 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
847 , skb_headlen(skb));
848 }
849
850 /* make sure headers are accessible directly */
851 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
852 goto err;
853 }
854
855 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
856 tq->stats.oversized_hdr++;
857 ctx->copy_size = 0;
858 return 0;
859 }
860
861 tdd = tq->data_ring.base + tq->tx_ring.next2fill;
862
863 memcpy(tdd->data, skb->data, ctx->copy_size);
864 dev_dbg(&adapter->netdev->dev,
865 "copy %u bytes to dataRing[%u]\n",
866 ctx->copy_size, tq->tx_ring.next2fill);
867 return 1;
868
869 err:
870 return -1;
871 }
872
873
874 static void
875 vmxnet3_prepare_tso(struct sk_buff *skb,
876 struct vmxnet3_tx_ctx *ctx)
877 {
878 struct tcphdr *tcph = (struct tcphdr *)skb_transport_header(skb);
879 if (ctx->ipv4) {
880 struct iphdr *iph = (struct iphdr *)skb_network_header(skb);
881 iph->check = 0;
882 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
883 IPPROTO_TCP, 0);
884 } else {
885 struct ipv6hdr *iph = (struct ipv6hdr *)skb_network_header(skb);
886 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
887 IPPROTO_TCP, 0);
888 }
889 }
890
891
892 /*
893 * Transmits a pkt thru a given tq
894 * Returns:
895 * NETDEV_TX_OK: descriptors are setup successfully
896 * NETDEV_TX_OK: error occurred, the pkt is dropped
897 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
898 *
899 * Side-effects:
900 * 1. tx ring may be changed
901 * 2. tq stats may be updated accordingly
902 * 3. shared->txNumDeferred may be updated
903 */
904
905 static int
906 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
907 struct vmxnet3_adapter *adapter, struct net_device *netdev)
908 {
909 int ret;
910 u32 count;
911 unsigned long flags;
912 struct vmxnet3_tx_ctx ctx;
913 union Vmxnet3_GenericDesc *gdesc;
914 #ifdef __BIG_ENDIAN_BITFIELD
915 /* Use temporary descriptor to avoid touching bits multiple times */
916 union Vmxnet3_GenericDesc tempTxDesc;
917 #endif
918
919 /* conservatively estimate # of descriptors to use */
920 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
921 skb_shinfo(skb)->nr_frags + 1;
922
923 ctx.ipv4 = (skb->protocol == cpu_to_be16(ETH_P_IP));
924
925 ctx.mss = skb_shinfo(skb)->gso_size;
926 if (ctx.mss) {
927 if (skb_header_cloned(skb)) {
928 if (unlikely(pskb_expand_head(skb, 0, 0,
929 GFP_ATOMIC) != 0)) {
930 tq->stats.drop_tso++;
931 goto drop_pkt;
932 }
933 tq->stats.copy_skb_header++;
934 }
935 vmxnet3_prepare_tso(skb, &ctx);
936 } else {
937 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
938
939 /* non-tso pkts must not use more than
940 * VMXNET3_MAX_TXD_PER_PKT entries
941 */
942 if (skb_linearize(skb) != 0) {
943 tq->stats.drop_too_many_frags++;
944 goto drop_pkt;
945 }
946 tq->stats.linearized++;
947
948 /* recalculate the # of descriptors to use */
949 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
950 }
951 }
952
953 spin_lock_irqsave(&tq->tx_lock, flags);
954
955 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
956 tq->stats.tx_ring_full++;
957 dev_dbg(&adapter->netdev->dev,
958 "tx queue stopped on %s, next2comp %u"
959 " next2fill %u\n", adapter->netdev->name,
960 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
961
962 vmxnet3_tq_stop(tq, adapter);
963 spin_unlock_irqrestore(&tq->tx_lock, flags);
964 return NETDEV_TX_BUSY;
965 }
966
967
968 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
969 if (ret >= 0) {
970 BUG_ON(ret <= 0 && ctx.copy_size != 0);
971 /* hdrs parsed, check against other limits */
972 if (ctx.mss) {
973 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
974 VMXNET3_MAX_TX_BUF_SIZE)) {
975 goto hdr_too_big;
976 }
977 } else {
978 if (skb->ip_summed == CHECKSUM_PARTIAL) {
979 if (unlikely(ctx.eth_ip_hdr_size +
980 skb->csum_offset >
981 VMXNET3_MAX_CSUM_OFFSET)) {
982 goto hdr_too_big;
983 }
984 }
985 }
986 } else {
987 tq->stats.drop_hdr_inspect_err++;
988 goto unlock_drop_pkt;
989 }
990
991 /* fill tx descs related to addr & len */
992 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
993
994 /* setup the EOP desc */
995 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
996
997 /* setup the SOP desc */
998 #ifdef __BIG_ENDIAN_BITFIELD
999 gdesc = &tempTxDesc;
1000 gdesc->dword[2] = ctx.sop_txd->dword[2];
1001 gdesc->dword[3] = ctx.sop_txd->dword[3];
1002 #else
1003 gdesc = ctx.sop_txd;
1004 #endif
1005 if (ctx.mss) {
1006 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1007 gdesc->txd.om = VMXNET3_OM_TSO;
1008 gdesc->txd.msscof = ctx.mss;
1009 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1010 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1011 } else {
1012 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1013 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1014 gdesc->txd.om = VMXNET3_OM_CSUM;
1015 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1016 skb->csum_offset;
1017 } else {
1018 gdesc->txd.om = 0;
1019 gdesc->txd.msscof = 0;
1020 }
1021 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1022 }
1023
1024 if (vlan_tx_tag_present(skb)) {
1025 gdesc->txd.ti = 1;
1026 gdesc->txd.tci = vlan_tx_tag_get(skb);
1027 }
1028
1029 /* finally flips the GEN bit of the SOP desc. */
1030 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1031 VMXNET3_TXD_GEN);
1032 #ifdef __BIG_ENDIAN_BITFIELD
1033 /* Finished updating in bitfields of Tx Desc, so write them in original
1034 * place.
1035 */
1036 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1037 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1038 gdesc = ctx.sop_txd;
1039 #endif
1040 dev_dbg(&adapter->netdev->dev,
1041 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1042 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd -
1043 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1044 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1045
1046 spin_unlock_irqrestore(&tq->tx_lock, flags);
1047
1048 if (le32_to_cpu(tq->shared->txNumDeferred) >=
1049 le32_to_cpu(tq->shared->txThreshold)) {
1050 tq->shared->txNumDeferred = 0;
1051 VMXNET3_WRITE_BAR0_REG(adapter,
1052 VMXNET3_REG_TXPROD + tq->qid * 8,
1053 tq->tx_ring.next2fill);
1054 }
1055
1056 return NETDEV_TX_OK;
1057
1058 hdr_too_big:
1059 tq->stats.drop_oversized_hdr++;
1060 unlock_drop_pkt:
1061 spin_unlock_irqrestore(&tq->tx_lock, flags);
1062 drop_pkt:
1063 tq->stats.drop_total++;
1064 dev_kfree_skb(skb);
1065 return NETDEV_TX_OK;
1066 }
1067
1068
1069 static netdev_tx_t
1070 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1071 {
1072 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1073
1074 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1075 return vmxnet3_tq_xmit(skb,
1076 &adapter->tx_queue[skb->queue_mapping],
1077 adapter, netdev);
1078 }
1079
1080
1081 static void
1082 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1083 struct sk_buff *skb,
1084 union Vmxnet3_GenericDesc *gdesc)
1085 {
1086 if (!gdesc->rcd.cnc && adapter->rxcsum) {
1087 /* typical case: TCP/UDP over IP and both csums are correct */
1088 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1089 VMXNET3_RCD_CSUM_OK) {
1090 skb->ip_summed = CHECKSUM_UNNECESSARY;
1091 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1092 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6));
1093 BUG_ON(gdesc->rcd.frg);
1094 } else {
1095 if (gdesc->rcd.csum) {
1096 skb->csum = htons(gdesc->rcd.csum);
1097 skb->ip_summed = CHECKSUM_PARTIAL;
1098 } else {
1099 skb_checksum_none_assert(skb);
1100 }
1101 }
1102 } else {
1103 skb_checksum_none_assert(skb);
1104 }
1105 }
1106
1107
1108 static void
1109 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1110 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1111 {
1112 rq->stats.drop_err++;
1113 if (!rcd->fcs)
1114 rq->stats.drop_fcs++;
1115
1116 rq->stats.drop_total++;
1117
1118 /*
1119 * We do not unmap and chain the rx buffer to the skb.
1120 * We basically pretend this buffer is not used and will be recycled
1121 * by vmxnet3_rq_alloc_rx_buf()
1122 */
1123
1124 /*
1125 * ctx->skb may be NULL if this is the first and the only one
1126 * desc for the pkt
1127 */
1128 if (ctx->skb)
1129 dev_kfree_skb_irq(ctx->skb);
1130
1131 ctx->skb = NULL;
1132 }
1133
1134
1135 static int
1136 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1137 struct vmxnet3_adapter *adapter, int quota)
1138 {
1139 static const u32 rxprod_reg[2] = {
1140 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1141 };
1142 u32 num_rxd = 0;
1143 struct Vmxnet3_RxCompDesc *rcd;
1144 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1145 #ifdef __BIG_ENDIAN_BITFIELD
1146 struct Vmxnet3_RxDesc rxCmdDesc;
1147 struct Vmxnet3_RxCompDesc rxComp;
1148 #endif
1149 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1150 &rxComp);
1151 while (rcd->gen == rq->comp_ring.gen) {
1152 struct vmxnet3_rx_buf_info *rbi;
1153 struct sk_buff *skb;
1154 int num_to_alloc;
1155 struct Vmxnet3_RxDesc *rxd;
1156 u32 idx, ring_idx;
1157
1158 if (num_rxd >= quota) {
1159 /* we may stop even before we see the EOP desc of
1160 * the current pkt
1161 */
1162 break;
1163 }
1164 num_rxd++;
1165 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1166 idx = rcd->rxdIdx;
1167 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1168 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1169 &rxCmdDesc);
1170 rbi = rq->buf_info[ring_idx] + idx;
1171
1172 BUG_ON(rxd->addr != rbi->dma_addr ||
1173 rxd->len != rbi->len);
1174
1175 if (unlikely(rcd->eop && rcd->err)) {
1176 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1177 goto rcd_done;
1178 }
1179
1180 if (rcd->sop) { /* first buf of the pkt */
1181 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1182 rcd->rqID != rq->qid);
1183
1184 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1185 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1186
1187 if (unlikely(rcd->len == 0)) {
1188 /* Pretend the rx buffer is skipped. */
1189 BUG_ON(!(rcd->sop && rcd->eop));
1190 dev_dbg(&adapter->netdev->dev,
1191 "rxRing[%u][%u] 0 length\n",
1192 ring_idx, idx);
1193 goto rcd_done;
1194 }
1195
1196 ctx->skb = rbi->skb;
1197 rbi->skb = NULL;
1198
1199 pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
1200 PCI_DMA_FROMDEVICE);
1201
1202 skb_put(ctx->skb, rcd->len);
1203 } else {
1204 BUG_ON(ctx->skb == NULL);
1205 /* non SOP buffer must be type 1 in most cases */
1206 if (rbi->buf_type == VMXNET3_RX_BUF_PAGE) {
1207 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1208
1209 if (rcd->len) {
1210 pci_unmap_page(adapter->pdev,
1211 rbi->dma_addr, rbi->len,
1212 PCI_DMA_FROMDEVICE);
1213
1214 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1215 rbi->page = NULL;
1216 }
1217 } else {
1218 /*
1219 * The only time a non-SOP buffer is type 0 is
1220 * when it's EOP and error flag is raised, which
1221 * has already been handled.
1222 */
1223 BUG_ON(true);
1224 }
1225 }
1226
1227 skb = ctx->skb;
1228 if (rcd->eop) {
1229 skb->len += skb->data_len;
1230 skb->truesize += skb->data_len;
1231
1232 vmxnet3_rx_csum(adapter, skb,
1233 (union Vmxnet3_GenericDesc *)rcd);
1234 skb->protocol = eth_type_trans(skb, adapter->netdev);
1235
1236 if (unlikely(adapter->vlan_grp && rcd->ts)) {
1237 vlan_hwaccel_receive_skb(skb,
1238 adapter->vlan_grp, rcd->tci);
1239 } else {
1240 netif_receive_skb(skb);
1241 }
1242
1243 ctx->skb = NULL;
1244 }
1245
1246 rcd_done:
1247 /* device may skip some rx descs */
1248 rq->rx_ring[ring_idx].next2comp = idx;
1249 VMXNET3_INC_RING_IDX_ONLY(rq->rx_ring[ring_idx].next2comp,
1250 rq->rx_ring[ring_idx].size);
1251
1252 /* refill rx buffers frequently to avoid starving the h/w */
1253 num_to_alloc = vmxnet3_cmd_ring_desc_avail(rq->rx_ring +
1254 ring_idx);
1255 if (unlikely(num_to_alloc > VMXNET3_RX_ALLOC_THRESHOLD(rq,
1256 ring_idx, adapter))) {
1257 vmxnet3_rq_alloc_rx_buf(rq, ring_idx, num_to_alloc,
1258 adapter);
1259
1260 /* if needed, update the register */
1261 if (unlikely(rq->shared->updateRxProd)) {
1262 VMXNET3_WRITE_BAR0_REG(adapter,
1263 rxprod_reg[ring_idx] + rq->qid * 8,
1264 rq->rx_ring[ring_idx].next2fill);
1265 rq->uncommitted[ring_idx] = 0;
1266 }
1267 }
1268
1269 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1270 vmxnet3_getRxComp(rcd,
1271 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1272 }
1273
1274 return num_rxd;
1275 }
1276
1277
1278 static void
1279 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1280 struct vmxnet3_adapter *adapter)
1281 {
1282 u32 i, ring_idx;
1283 struct Vmxnet3_RxDesc *rxd;
1284
1285 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1286 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1287 #ifdef __BIG_ENDIAN_BITFIELD
1288 struct Vmxnet3_RxDesc rxDesc;
1289 #endif
1290 vmxnet3_getRxDesc(rxd,
1291 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1292
1293 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1294 rq->buf_info[ring_idx][i].skb) {
1295 pci_unmap_single(adapter->pdev, rxd->addr,
1296 rxd->len, PCI_DMA_FROMDEVICE);
1297 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1298 rq->buf_info[ring_idx][i].skb = NULL;
1299 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1300 rq->buf_info[ring_idx][i].page) {
1301 pci_unmap_page(adapter->pdev, rxd->addr,
1302 rxd->len, PCI_DMA_FROMDEVICE);
1303 put_page(rq->buf_info[ring_idx][i].page);
1304 rq->buf_info[ring_idx][i].page = NULL;
1305 }
1306 }
1307
1308 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1309 rq->rx_ring[ring_idx].next2fill =
1310 rq->rx_ring[ring_idx].next2comp = 0;
1311 rq->uncommitted[ring_idx] = 0;
1312 }
1313
1314 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1315 rq->comp_ring.next2proc = 0;
1316 }
1317
1318
1319 static void
1320 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1321 {
1322 int i;
1323
1324 for (i = 0; i < adapter->num_rx_queues; i++)
1325 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1326 }
1327
1328
1329 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1330 struct vmxnet3_adapter *adapter)
1331 {
1332 int i;
1333 int j;
1334
1335 /* all rx buffers must have already been freed */
1336 for (i = 0; i < 2; i++) {
1337 if (rq->buf_info[i]) {
1338 for (j = 0; j < rq->rx_ring[i].size; j++)
1339 BUG_ON(rq->buf_info[i][j].page != NULL);
1340 }
1341 }
1342
1343
1344 kfree(rq->buf_info[0]);
1345
1346 for (i = 0; i < 2; i++) {
1347 if (rq->rx_ring[i].base) {
1348 pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
1349 * sizeof(struct Vmxnet3_RxDesc),
1350 rq->rx_ring[i].base,
1351 rq->rx_ring[i].basePA);
1352 rq->rx_ring[i].base = NULL;
1353 }
1354 rq->buf_info[i] = NULL;
1355 }
1356
1357 if (rq->comp_ring.base) {
1358 pci_free_consistent(adapter->pdev, rq->comp_ring.size *
1359 sizeof(struct Vmxnet3_RxCompDesc),
1360 rq->comp_ring.base, rq->comp_ring.basePA);
1361 rq->comp_ring.base = NULL;
1362 }
1363 }
1364
1365
1366 static int
1367 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1368 struct vmxnet3_adapter *adapter)
1369 {
1370 int i;
1371
1372 /* initialize buf_info */
1373 for (i = 0; i < rq->rx_ring[0].size; i++) {
1374
1375 /* 1st buf for a pkt is skbuff */
1376 if (i % adapter->rx_buf_per_pkt == 0) {
1377 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1378 rq->buf_info[0][i].len = adapter->skb_buf_size;
1379 } else { /* subsequent bufs for a pkt is frag */
1380 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1381 rq->buf_info[0][i].len = PAGE_SIZE;
1382 }
1383 }
1384 for (i = 0; i < rq->rx_ring[1].size; i++) {
1385 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1386 rq->buf_info[1][i].len = PAGE_SIZE;
1387 }
1388
1389 /* reset internal state and allocate buffers for both rings */
1390 for (i = 0; i < 2; i++) {
1391 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1392 rq->uncommitted[i] = 0;
1393
1394 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1395 sizeof(struct Vmxnet3_RxDesc));
1396 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1397 }
1398 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1399 adapter) == 0) {
1400 /* at least has 1 rx buffer for the 1st ring */
1401 return -ENOMEM;
1402 }
1403 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1404
1405 /* reset the comp ring */
1406 rq->comp_ring.next2proc = 0;
1407 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1408 sizeof(struct Vmxnet3_RxCompDesc));
1409 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1410
1411 /* reset rxctx */
1412 rq->rx_ctx.skb = NULL;
1413
1414 /* stats are not reset */
1415 return 0;
1416 }
1417
1418
1419 static int
1420 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1421 {
1422 int i, err = 0;
1423
1424 for (i = 0; i < adapter->num_rx_queues; i++) {
1425 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1426 if (unlikely(err)) {
1427 dev_err(&adapter->netdev->dev, "%s: failed to "
1428 "initialize rx queue%i\n",
1429 adapter->netdev->name, i);
1430 break;
1431 }
1432 }
1433 return err;
1434
1435 }
1436
1437
1438 static int
1439 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1440 {
1441 int i;
1442 size_t sz;
1443 struct vmxnet3_rx_buf_info *bi;
1444
1445 for (i = 0; i < 2; i++) {
1446
1447 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1448 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
1449 &rq->rx_ring[i].basePA);
1450 if (!rq->rx_ring[i].base) {
1451 printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
1452 adapter->netdev->name, i);
1453 goto err;
1454 }
1455 }
1456
1457 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1458 rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
1459 &rq->comp_ring.basePA);
1460 if (!rq->comp_ring.base) {
1461 printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
1462 adapter->netdev->name);
1463 goto err;
1464 }
1465
1466 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1467 rq->rx_ring[1].size);
1468 bi = kzalloc(sz, GFP_KERNEL);
1469 if (!bi) {
1470 printk(KERN_ERR "%s: failed to allocate rx bufinfo\n",
1471 adapter->netdev->name);
1472 goto err;
1473 }
1474 rq->buf_info[0] = bi;
1475 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1476
1477 return 0;
1478
1479 err:
1480 vmxnet3_rq_destroy(rq, adapter);
1481 return -ENOMEM;
1482 }
1483
1484
1485 static int
1486 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1487 {
1488 int i, err = 0;
1489
1490 for (i = 0; i < adapter->num_rx_queues; i++) {
1491 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1492 if (unlikely(err)) {
1493 dev_err(&adapter->netdev->dev,
1494 "%s: failed to create rx queue%i\n",
1495 adapter->netdev->name, i);
1496 goto err_out;
1497 }
1498 }
1499 return err;
1500 err_out:
1501 vmxnet3_rq_destroy_all(adapter);
1502 return err;
1503
1504 }
1505
1506 /* Multiple queue aware polling function for tx and rx */
1507
1508 static int
1509 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1510 {
1511 int rcd_done = 0, i;
1512 if (unlikely(adapter->shared->ecr))
1513 vmxnet3_process_events(adapter);
1514 for (i = 0; i < adapter->num_tx_queues; i++)
1515 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1516
1517 for (i = 0; i < adapter->num_rx_queues; i++)
1518 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1519 adapter, budget);
1520 return rcd_done;
1521 }
1522
1523
1524 static int
1525 vmxnet3_poll(struct napi_struct *napi, int budget)
1526 {
1527 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1528 struct vmxnet3_rx_queue, napi);
1529 int rxd_done;
1530
1531 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1532
1533 if (rxd_done < budget) {
1534 napi_complete(napi);
1535 vmxnet3_enable_all_intrs(rx_queue->adapter);
1536 }
1537 return rxd_done;
1538 }
1539
1540 /*
1541 * NAPI polling function for MSI-X mode with multiple Rx queues
1542 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1543 */
1544
1545 static int
1546 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1547 {
1548 struct vmxnet3_rx_queue *rq = container_of(napi,
1549 struct vmxnet3_rx_queue, napi);
1550 struct vmxnet3_adapter *adapter = rq->adapter;
1551 int rxd_done;
1552
1553 /* When sharing interrupt with corresponding tx queue, process
1554 * tx completions in that queue as well
1555 */
1556 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1557 struct vmxnet3_tx_queue *tq =
1558 &adapter->tx_queue[rq - adapter->rx_queue];
1559 vmxnet3_tq_tx_complete(tq, adapter);
1560 }
1561
1562 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1563
1564 if (rxd_done < budget) {
1565 napi_complete(napi);
1566 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1567 }
1568 return rxd_done;
1569 }
1570
1571
1572 #ifdef CONFIG_PCI_MSI
1573
1574 /*
1575 * Handle completion interrupts on tx queues
1576 * Returns whether or not the intr is handled
1577 */
1578
1579 static irqreturn_t
1580 vmxnet3_msix_tx(int irq, void *data)
1581 {
1582 struct vmxnet3_tx_queue *tq = data;
1583 struct vmxnet3_adapter *adapter = tq->adapter;
1584
1585 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1586 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1587
1588 /* Handle the case where only one irq is allocate for all tx queues */
1589 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1590 int i;
1591 for (i = 0; i < adapter->num_tx_queues; i++) {
1592 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1593 vmxnet3_tq_tx_complete(txq, adapter);
1594 }
1595 } else {
1596 vmxnet3_tq_tx_complete(tq, adapter);
1597 }
1598 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1599
1600 return IRQ_HANDLED;
1601 }
1602
1603
1604 /*
1605 * Handle completion interrupts on rx queues. Returns whether or not the
1606 * intr is handled
1607 */
1608
1609 static irqreturn_t
1610 vmxnet3_msix_rx(int irq, void *data)
1611 {
1612 struct vmxnet3_rx_queue *rq = data;
1613 struct vmxnet3_adapter *adapter = rq->adapter;
1614
1615 /* disable intr if needed */
1616 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1617 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1618 napi_schedule(&rq->napi);
1619
1620 return IRQ_HANDLED;
1621 }
1622
1623 /*
1624 *----------------------------------------------------------------------------
1625 *
1626 * vmxnet3_msix_event --
1627 *
1628 * vmxnet3 msix event intr handler
1629 *
1630 * Result:
1631 * whether or not the intr is handled
1632 *
1633 *----------------------------------------------------------------------------
1634 */
1635
1636 static irqreturn_t
1637 vmxnet3_msix_event(int irq, void *data)
1638 {
1639 struct net_device *dev = data;
1640 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1641
1642 /* disable intr if needed */
1643 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1644 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1645
1646 if (adapter->shared->ecr)
1647 vmxnet3_process_events(adapter);
1648
1649 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1650
1651 return IRQ_HANDLED;
1652 }
1653
1654 #endif /* CONFIG_PCI_MSI */
1655
1656
1657 /* Interrupt handler for vmxnet3 */
1658 static irqreturn_t
1659 vmxnet3_intr(int irq, void *dev_id)
1660 {
1661 struct net_device *dev = dev_id;
1662 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1663
1664 if (adapter->intr.type == VMXNET3_IT_INTX) {
1665 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1666 if (unlikely(icr == 0))
1667 /* not ours */
1668 return IRQ_NONE;
1669 }
1670
1671
1672 /* disable intr if needed */
1673 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1674 vmxnet3_disable_all_intrs(adapter);
1675
1676 napi_schedule(&adapter->rx_queue[0].napi);
1677
1678 return IRQ_HANDLED;
1679 }
1680
1681 #ifdef CONFIG_NET_POLL_CONTROLLER
1682
1683 /* netpoll callback. */
1684 static void
1685 vmxnet3_netpoll(struct net_device *netdev)
1686 {
1687 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1688
1689 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1690 vmxnet3_disable_all_intrs(adapter);
1691
1692 vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
1693 vmxnet3_enable_all_intrs(adapter);
1694
1695 }
1696 #endif /* CONFIG_NET_POLL_CONTROLLER */
1697
1698 static int
1699 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1700 {
1701 struct vmxnet3_intr *intr = &adapter->intr;
1702 int err = 0, i;
1703 int vector = 0;
1704
1705 #ifdef CONFIG_PCI_MSI
1706 if (adapter->intr.type == VMXNET3_IT_MSIX) {
1707 for (i = 0; i < adapter->num_tx_queues; i++) {
1708 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1709 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1710 adapter->netdev->name, vector);
1711 err = request_irq(
1712 intr->msix_entries[vector].vector,
1713 vmxnet3_msix_tx, 0,
1714 adapter->tx_queue[i].name,
1715 &adapter->tx_queue[i]);
1716 } else {
1717 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1718 adapter->netdev->name, vector);
1719 }
1720 if (err) {
1721 dev_err(&adapter->netdev->dev,
1722 "Failed to request irq for MSIX, %s, "
1723 "error %d\n",
1724 adapter->tx_queue[i].name, err);
1725 return err;
1726 }
1727
1728 /* Handle the case where only 1 MSIx was allocated for
1729 * all tx queues */
1730 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1731 for (; i < adapter->num_tx_queues; i++)
1732 adapter->tx_queue[i].comp_ring.intr_idx
1733 = vector;
1734 vector++;
1735 break;
1736 } else {
1737 adapter->tx_queue[i].comp_ring.intr_idx
1738 = vector++;
1739 }
1740 }
1741 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1742 vector = 0;
1743
1744 for (i = 0; i < adapter->num_rx_queues; i++) {
1745 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1746 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1747 adapter->netdev->name, vector);
1748 else
1749 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1750 adapter->netdev->name, vector);
1751 err = request_irq(intr->msix_entries[vector].vector,
1752 vmxnet3_msix_rx, 0,
1753 adapter->rx_queue[i].name,
1754 &(adapter->rx_queue[i]));
1755 if (err) {
1756 printk(KERN_ERR "Failed to request irq for MSIX"
1757 ", %s, error %d\n",
1758 adapter->rx_queue[i].name, err);
1759 return err;
1760 }
1761
1762 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1763 }
1764
1765 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1766 adapter->netdev->name, vector);
1767 err = request_irq(intr->msix_entries[vector].vector,
1768 vmxnet3_msix_event, 0,
1769 intr->event_msi_vector_name, adapter->netdev);
1770 intr->event_intr_idx = vector;
1771
1772 } else if (intr->type == VMXNET3_IT_MSI) {
1773 adapter->num_rx_queues = 1;
1774 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1775 adapter->netdev->name, adapter->netdev);
1776 } else {
1777 #endif
1778 adapter->num_rx_queues = 1;
1779 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1780 IRQF_SHARED, adapter->netdev->name,
1781 adapter->netdev);
1782 #ifdef CONFIG_PCI_MSI
1783 }
1784 #endif
1785 intr->num_intrs = vector + 1;
1786 if (err) {
1787 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
1788 ":%d\n", adapter->netdev->name, intr->type, err);
1789 } else {
1790 /* Number of rx queues will not change after this */
1791 for (i = 0; i < adapter->num_rx_queues; i++) {
1792 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1793 rq->qid = i;
1794 rq->qid2 = i + adapter->num_rx_queues;
1795 }
1796
1797
1798
1799 /* init our intr settings */
1800 for (i = 0; i < intr->num_intrs; i++)
1801 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1802 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1803 adapter->intr.event_intr_idx = 0;
1804 for (i = 0; i < adapter->num_tx_queues; i++)
1805 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1806 adapter->rx_queue[0].comp_ring.intr_idx = 0;
1807 }
1808
1809 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
1810 "allocated\n", adapter->netdev->name, intr->type,
1811 intr->mask_mode, intr->num_intrs);
1812 }
1813
1814 return err;
1815 }
1816
1817
1818 static void
1819 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1820 {
1821 struct vmxnet3_intr *intr = &adapter->intr;
1822 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1823
1824 switch (intr->type) {
1825 #ifdef CONFIG_PCI_MSI
1826 case VMXNET3_IT_MSIX:
1827 {
1828 int i, vector = 0;
1829
1830 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1831 for (i = 0; i < adapter->num_tx_queues; i++) {
1832 free_irq(intr->msix_entries[vector++].vector,
1833 &(adapter->tx_queue[i]));
1834 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1835 break;
1836 }
1837 }
1838
1839 for (i = 0; i < adapter->num_rx_queues; i++) {
1840 free_irq(intr->msix_entries[vector++].vector,
1841 &(adapter->rx_queue[i]));
1842 }
1843
1844 free_irq(intr->msix_entries[vector].vector,
1845 adapter->netdev);
1846 BUG_ON(vector >= intr->num_intrs);
1847 break;
1848 }
1849 #endif
1850 case VMXNET3_IT_MSI:
1851 free_irq(adapter->pdev->irq, adapter->netdev);
1852 break;
1853 case VMXNET3_IT_INTX:
1854 free_irq(adapter->pdev->irq, adapter->netdev);
1855 break;
1856 default:
1857 BUG_ON(true);
1858 }
1859 }
1860
1861 static void
1862 vmxnet3_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
1863 {
1864 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1865 struct Vmxnet3_DriverShared *shared = adapter->shared;
1866 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1867 unsigned long flags;
1868
1869 if (grp) {
1870 /* add vlan rx stripping. */
1871 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX) {
1872 int i;
1873 adapter->vlan_grp = grp;
1874
1875 /*
1876 * Clear entire vfTable; then enable untagged pkts.
1877 * Note: setting one entry in vfTable to non-zero turns
1878 * on VLAN rx filtering.
1879 */
1880 for (i = 0; i < VMXNET3_VFT_SIZE; i++)
1881 vfTable[i] = 0;
1882
1883 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1884 spin_lock_irqsave(&adapter->cmd_lock, flags);
1885 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1886 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1887 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1888 } else {
1889 printk(KERN_ERR "%s: vlan_rx_register when device has "
1890 "no NETIF_F_HW_VLAN_RX\n", netdev->name);
1891 }
1892 } else {
1893 /* remove vlan rx stripping. */
1894 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
1895 adapter->vlan_grp = NULL;
1896
1897 if (devRead->misc.uptFeatures & UPT1_F_RXVLAN) {
1898 int i;
1899
1900 for (i = 0; i < VMXNET3_VFT_SIZE; i++) {
1901 /* clear entire vfTable; this also disables
1902 * VLAN rx filtering
1903 */
1904 vfTable[i] = 0;
1905 }
1906 spin_lock_irqsave(&adapter->cmd_lock, flags);
1907 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1908 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1909 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1910 }
1911 }
1912 }
1913
1914
1915 static void
1916 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1917 {
1918 if (adapter->vlan_grp) {
1919 u16 vid;
1920 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1921 bool activeVlan = false;
1922
1923 for (vid = 0; vid < VLAN_N_VID; vid++) {
1924 if (vlan_group_get_device(adapter->vlan_grp, vid)) {
1925 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1926 activeVlan = true;
1927 }
1928 }
1929 if (activeVlan) {
1930 /* continue to allow untagged pkts */
1931 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1932 }
1933 }
1934 }
1935
1936
1937 static void
1938 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1939 {
1940 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1941 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1942 unsigned long flags;
1943
1944 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1945 spin_lock_irqsave(&adapter->cmd_lock, flags);
1946 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1947 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1948 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1949 }
1950
1951
1952 static void
1953 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1954 {
1955 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1956 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1957 unsigned long flags;
1958
1959 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
1960 spin_lock_irqsave(&adapter->cmd_lock, flags);
1961 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1962 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1963 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1964 }
1965
1966
1967 static u8 *
1968 vmxnet3_copy_mc(struct net_device *netdev)
1969 {
1970 u8 *buf = NULL;
1971 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
1972
1973 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
1974 if (sz <= 0xffff) {
1975 /* We may be called with BH disabled */
1976 buf = kmalloc(sz, GFP_ATOMIC);
1977 if (buf) {
1978 struct netdev_hw_addr *ha;
1979 int i = 0;
1980
1981 netdev_for_each_mc_addr(ha, netdev)
1982 memcpy(buf + i++ * ETH_ALEN, ha->addr,
1983 ETH_ALEN);
1984 }
1985 }
1986 return buf;
1987 }
1988
1989
1990 static void
1991 vmxnet3_set_mc(struct net_device *netdev)
1992 {
1993 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1994 unsigned long flags;
1995 struct Vmxnet3_RxFilterConf *rxConf =
1996 &adapter->shared->devRead.rxFilterConf;
1997 u8 *new_table = NULL;
1998 u32 new_mode = VMXNET3_RXM_UCAST;
1999
2000 if (netdev->flags & IFF_PROMISC)
2001 new_mode |= VMXNET3_RXM_PROMISC;
2002
2003 if (netdev->flags & IFF_BROADCAST)
2004 new_mode |= VMXNET3_RXM_BCAST;
2005
2006 if (netdev->flags & IFF_ALLMULTI)
2007 new_mode |= VMXNET3_RXM_ALL_MULTI;
2008 else
2009 if (!netdev_mc_empty(netdev)) {
2010 new_table = vmxnet3_copy_mc(netdev);
2011 if (new_table) {
2012 new_mode |= VMXNET3_RXM_MCAST;
2013 rxConf->mfTableLen = cpu_to_le16(
2014 netdev_mc_count(netdev) * ETH_ALEN);
2015 rxConf->mfTablePA = cpu_to_le64(virt_to_phys(
2016 new_table));
2017 } else {
2018 printk(KERN_INFO "%s: failed to copy mcast list"
2019 ", setting ALL_MULTI\n", netdev->name);
2020 new_mode |= VMXNET3_RXM_ALL_MULTI;
2021 }
2022 }
2023
2024
2025 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2026 rxConf->mfTableLen = 0;
2027 rxConf->mfTablePA = 0;
2028 }
2029
2030 spin_lock_irqsave(&adapter->cmd_lock, flags);
2031 if (new_mode != rxConf->rxMode) {
2032 rxConf->rxMode = cpu_to_le32(new_mode);
2033 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2034 VMXNET3_CMD_UPDATE_RX_MODE);
2035 }
2036
2037 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2038 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2039 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2040
2041 kfree(new_table);
2042 }
2043
2044 void
2045 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2046 {
2047 int i;
2048
2049 for (i = 0; i < adapter->num_rx_queues; i++)
2050 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2051 }
2052
2053
2054 /*
2055 * Set up driver_shared based on settings in adapter.
2056 */
2057
2058 static void
2059 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2060 {
2061 struct Vmxnet3_DriverShared *shared = adapter->shared;
2062 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2063 struct Vmxnet3_TxQueueConf *tqc;
2064 struct Vmxnet3_RxQueueConf *rqc;
2065 int i;
2066
2067 memset(shared, 0, sizeof(*shared));
2068
2069 /* driver settings */
2070 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2071 devRead->misc.driverInfo.version = cpu_to_le32(
2072 VMXNET3_DRIVER_VERSION_NUM);
2073 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2074 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2075 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2076 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2077 *((u32 *)&devRead->misc.driverInfo.gos));
2078 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2079 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2080
2081 devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter));
2082 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2083
2084 /* set up feature flags */
2085 if (adapter->rxcsum)
2086 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2087
2088 if (adapter->lro) {
2089 devRead->misc.uptFeatures |= UPT1_F_LRO;
2090 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2091 }
2092 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX)
2093 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2094
2095 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2096 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2097 devRead->misc.queueDescLen = cpu_to_le32(
2098 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2099 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2100
2101 /* tx queue settings */
2102 devRead->misc.numTxQueues = adapter->num_tx_queues;
2103 for (i = 0; i < adapter->num_tx_queues; i++) {
2104 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2105 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2106 tqc = &adapter->tqd_start[i].conf;
2107 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2108 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2109 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2110 tqc->ddPA = cpu_to_le64(virt_to_phys(tq->buf_info));
2111 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2112 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2113 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2114 tqc->ddLen = cpu_to_le32(
2115 sizeof(struct vmxnet3_tx_buf_info) *
2116 tqc->txRingSize);
2117 tqc->intrIdx = tq->comp_ring.intr_idx;
2118 }
2119
2120 /* rx queue settings */
2121 devRead->misc.numRxQueues = adapter->num_rx_queues;
2122 for (i = 0; i < adapter->num_rx_queues; i++) {
2123 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2124 rqc = &adapter->rqd_start[i].conf;
2125 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2126 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2127 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2128 rqc->ddPA = cpu_to_le64(virt_to_phys(
2129 rq->buf_info));
2130 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2131 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2132 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2133 rqc->ddLen = cpu_to_le32(
2134 sizeof(struct vmxnet3_rx_buf_info) *
2135 (rqc->rxRingSize[0] +
2136 rqc->rxRingSize[1]));
2137 rqc->intrIdx = rq->comp_ring.intr_idx;
2138 }
2139
2140 #ifdef VMXNET3_RSS
2141 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2142
2143 if (adapter->rss) {
2144 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2145 devRead->misc.uptFeatures |= UPT1_F_RSS;
2146 devRead->misc.numRxQueues = adapter->num_rx_queues;
2147 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2148 UPT1_RSS_HASH_TYPE_IPV4 |
2149 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2150 UPT1_RSS_HASH_TYPE_IPV6;
2151 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2152 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2153 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2154 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
2155 for (i = 0; i < rssConf->indTableSize; i++)
2156 rssConf->indTable[i] = i % adapter->num_rx_queues;
2157
2158 devRead->rssConfDesc.confVer = 1;
2159 devRead->rssConfDesc.confLen = sizeof(*rssConf);
2160 devRead->rssConfDesc.confPA = virt_to_phys(rssConf);
2161 }
2162
2163 #endif /* VMXNET3_RSS */
2164
2165 /* intr settings */
2166 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2167 VMXNET3_IMM_AUTO;
2168 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2169 for (i = 0; i < adapter->intr.num_intrs; i++)
2170 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2171
2172 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2173 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2174
2175 /* rx filter settings */
2176 devRead->rxFilterConf.rxMode = 0;
2177 vmxnet3_restore_vlan(adapter);
2178 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2179
2180 /* the rest are already zeroed */
2181 }
2182
2183
2184 int
2185 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2186 {
2187 int err, i;
2188 u32 ret;
2189 unsigned long flags;
2190
2191 dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2192 " ring sizes %u %u %u\n", adapter->netdev->name,
2193 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2194 adapter->tx_queue[0].tx_ring.size,
2195 adapter->rx_queue[0].rx_ring[0].size,
2196 adapter->rx_queue[0].rx_ring[1].size);
2197
2198 vmxnet3_tq_init_all(adapter);
2199 err = vmxnet3_rq_init_all(adapter);
2200 if (err) {
2201 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
2202 adapter->netdev->name, err);
2203 goto rq_err;
2204 }
2205
2206 err = vmxnet3_request_irqs(adapter);
2207 if (err) {
2208 printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
2209 adapter->netdev->name, err);
2210 goto irq_err;
2211 }
2212
2213 vmxnet3_setup_driver_shared(adapter);
2214
2215 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2216 adapter->shared_pa));
2217 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2218 adapter->shared_pa));
2219 spin_lock_irqsave(&adapter->cmd_lock, flags);
2220 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2221 VMXNET3_CMD_ACTIVATE_DEV);
2222 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2223 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2224
2225 if (ret != 0) {
2226 printk(KERN_ERR "Failed to activate dev %s: error %u\n",
2227 adapter->netdev->name, ret);
2228 err = -EINVAL;
2229 goto activate_err;
2230 }
2231
2232 for (i = 0; i < adapter->num_rx_queues; i++) {
2233 VMXNET3_WRITE_BAR0_REG(adapter,
2234 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2235 adapter->rx_queue[i].rx_ring[0].next2fill);
2236 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2237 (i * VMXNET3_REG_ALIGN)),
2238 adapter->rx_queue[i].rx_ring[1].next2fill);
2239 }
2240
2241 /* Apply the rx filter settins last. */
2242 vmxnet3_set_mc(adapter->netdev);
2243
2244 /*
2245 * Check link state when first activating device. It will start the
2246 * tx queue if the link is up.
2247 */
2248 vmxnet3_check_link(adapter, true);
2249 for (i = 0; i < adapter->num_rx_queues; i++)
2250 napi_enable(&adapter->rx_queue[i].napi);
2251 vmxnet3_enable_all_intrs(adapter);
2252 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2253 return 0;
2254
2255 activate_err:
2256 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2257 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2258 vmxnet3_free_irqs(adapter);
2259 irq_err:
2260 rq_err:
2261 /* free up buffers we allocated */
2262 vmxnet3_rq_cleanup_all(adapter);
2263 return err;
2264 }
2265
2266
2267 void
2268 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2269 {
2270 unsigned long flags;
2271 spin_lock_irqsave(&adapter->cmd_lock, flags);
2272 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2273 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2274 }
2275
2276
2277 int
2278 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2279 {
2280 int i;
2281 unsigned long flags;
2282 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2283 return 0;
2284
2285
2286 spin_lock_irqsave(&adapter->cmd_lock, flags);
2287 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2288 VMXNET3_CMD_QUIESCE_DEV);
2289 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2290 vmxnet3_disable_all_intrs(adapter);
2291
2292 for (i = 0; i < adapter->num_rx_queues; i++)
2293 napi_disable(&adapter->rx_queue[i].napi);
2294 netif_tx_disable(adapter->netdev);
2295 adapter->link_speed = 0;
2296 netif_carrier_off(adapter->netdev);
2297
2298 vmxnet3_tq_cleanup_all(adapter);
2299 vmxnet3_rq_cleanup_all(adapter);
2300 vmxnet3_free_irqs(adapter);
2301 return 0;
2302 }
2303
2304
2305 static void
2306 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2307 {
2308 u32 tmp;
2309
2310 tmp = *(u32 *)mac;
2311 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2312
2313 tmp = (mac[5] << 8) | mac[4];
2314 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2315 }
2316
2317
2318 static int
2319 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2320 {
2321 struct sockaddr *addr = p;
2322 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2323
2324 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2325 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2326
2327 return 0;
2328 }
2329
2330
2331 /* ==================== initialization and cleanup routines ============ */
2332
2333 static int
2334 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2335 {
2336 int err;
2337 unsigned long mmio_start, mmio_len;
2338 struct pci_dev *pdev = adapter->pdev;
2339
2340 err = pci_enable_device(pdev);
2341 if (err) {
2342 printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
2343 pci_name(pdev), err);
2344 return err;
2345 }
2346
2347 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2348 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2349 printk(KERN_ERR "pci_set_consistent_dma_mask failed "
2350 "for adapter %s\n", pci_name(pdev));
2351 err = -EIO;
2352 goto err_set_mask;
2353 }
2354 *dma64 = true;
2355 } else {
2356 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2357 printk(KERN_ERR "pci_set_dma_mask failed for adapter "
2358 "%s\n", pci_name(pdev));
2359 err = -EIO;
2360 goto err_set_mask;
2361 }
2362 *dma64 = false;
2363 }
2364
2365 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2366 vmxnet3_driver_name);
2367 if (err) {
2368 printk(KERN_ERR "Failed to request region for adapter %s: "
2369 "error %d\n", pci_name(pdev), err);
2370 goto err_set_mask;
2371 }
2372
2373 pci_set_master(pdev);
2374
2375 mmio_start = pci_resource_start(pdev, 0);
2376 mmio_len = pci_resource_len(pdev, 0);
2377 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2378 if (!adapter->hw_addr0) {
2379 printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
2380 pci_name(pdev));
2381 err = -EIO;
2382 goto err_ioremap;
2383 }
2384
2385 mmio_start = pci_resource_start(pdev, 1);
2386 mmio_len = pci_resource_len(pdev, 1);
2387 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2388 if (!adapter->hw_addr1) {
2389 printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
2390 pci_name(pdev));
2391 err = -EIO;
2392 goto err_bar1;
2393 }
2394 return 0;
2395
2396 err_bar1:
2397 iounmap(adapter->hw_addr0);
2398 err_ioremap:
2399 pci_release_selected_regions(pdev, (1 << 2) - 1);
2400 err_set_mask:
2401 pci_disable_device(pdev);
2402 return err;
2403 }
2404
2405
2406 static void
2407 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2408 {
2409 BUG_ON(!adapter->pdev);
2410
2411 iounmap(adapter->hw_addr0);
2412 iounmap(adapter->hw_addr1);
2413 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2414 pci_disable_device(adapter->pdev);
2415 }
2416
2417
2418 static void
2419 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2420 {
2421 size_t sz, i, ring0_size, ring1_size, comp_size;
2422 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2423
2424
2425 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2426 VMXNET3_MAX_ETH_HDR_SIZE) {
2427 adapter->skb_buf_size = adapter->netdev->mtu +
2428 VMXNET3_MAX_ETH_HDR_SIZE;
2429 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2430 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2431
2432 adapter->rx_buf_per_pkt = 1;
2433 } else {
2434 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2435 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2436 VMXNET3_MAX_ETH_HDR_SIZE;
2437 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2438 }
2439
2440 /*
2441 * for simplicity, force the ring0 size to be a multiple of
2442 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2443 */
2444 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2445 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2446 ring0_size = (ring0_size + sz - 1) / sz * sz;
2447 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2448 sz * sz);
2449 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2450 comp_size = ring0_size + ring1_size;
2451
2452 for (i = 0; i < adapter->num_rx_queues; i++) {
2453 rq = &adapter->rx_queue[i];
2454 rq->rx_ring[0].size = ring0_size;
2455 rq->rx_ring[1].size = ring1_size;
2456 rq->comp_ring.size = comp_size;
2457 }
2458 }
2459
2460
2461 int
2462 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2463 u32 rx_ring_size, u32 rx_ring2_size)
2464 {
2465 int err = 0, i;
2466
2467 for (i = 0; i < adapter->num_tx_queues; i++) {
2468 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2469 tq->tx_ring.size = tx_ring_size;
2470 tq->data_ring.size = tx_ring_size;
2471 tq->comp_ring.size = tx_ring_size;
2472 tq->shared = &adapter->tqd_start[i].ctrl;
2473 tq->stopped = true;
2474 tq->adapter = adapter;
2475 tq->qid = i;
2476 err = vmxnet3_tq_create(tq, adapter);
2477 /*
2478 * Too late to change num_tx_queues. We cannot do away with
2479 * lesser number of queues than what we asked for
2480 */
2481 if (err)
2482 goto queue_err;
2483 }
2484
2485 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2486 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2487 vmxnet3_adjust_rx_ring_size(adapter);
2488 for (i = 0; i < adapter->num_rx_queues; i++) {
2489 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2490 /* qid and qid2 for rx queues will be assigned later when num
2491 * of rx queues is finalized after allocating intrs */
2492 rq->shared = &adapter->rqd_start[i].ctrl;
2493 rq->adapter = adapter;
2494 err = vmxnet3_rq_create(rq, adapter);
2495 if (err) {
2496 if (i == 0) {
2497 printk(KERN_ERR "Could not allocate any rx"
2498 "queues. Aborting.\n");
2499 goto queue_err;
2500 } else {
2501 printk(KERN_INFO "Number of rx queues changed "
2502 "to : %d.\n", i);
2503 adapter->num_rx_queues = i;
2504 err = 0;
2505 break;
2506 }
2507 }
2508 }
2509 return err;
2510 queue_err:
2511 vmxnet3_tq_destroy_all(adapter);
2512 return err;
2513 }
2514
2515 static int
2516 vmxnet3_open(struct net_device *netdev)
2517 {
2518 struct vmxnet3_adapter *adapter;
2519 int err, i;
2520
2521 adapter = netdev_priv(netdev);
2522
2523 for (i = 0; i < adapter->num_tx_queues; i++)
2524 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2525
2526 err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
2527 VMXNET3_DEF_RX_RING_SIZE,
2528 VMXNET3_DEF_RX_RING_SIZE);
2529 if (err)
2530 goto queue_err;
2531
2532 err = vmxnet3_activate_dev(adapter);
2533 if (err)
2534 goto activate_err;
2535
2536 return 0;
2537
2538 activate_err:
2539 vmxnet3_rq_destroy_all(adapter);
2540 vmxnet3_tq_destroy_all(adapter);
2541 queue_err:
2542 return err;
2543 }
2544
2545
2546 static int
2547 vmxnet3_close(struct net_device *netdev)
2548 {
2549 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2550
2551 /*
2552 * Reset_work may be in the middle of resetting the device, wait for its
2553 * completion.
2554 */
2555 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2556 msleep(1);
2557
2558 vmxnet3_quiesce_dev(adapter);
2559
2560 vmxnet3_rq_destroy_all(adapter);
2561 vmxnet3_tq_destroy_all(adapter);
2562
2563 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2564
2565
2566 return 0;
2567 }
2568
2569
2570 void
2571 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2572 {
2573 int i;
2574
2575 /*
2576 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2577 * vmxnet3_close() will deadlock.
2578 */
2579 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2580
2581 /* we need to enable NAPI, otherwise dev_close will deadlock */
2582 for (i = 0; i < adapter->num_rx_queues; i++)
2583 napi_enable(&adapter->rx_queue[i].napi);
2584 dev_close(adapter->netdev);
2585 }
2586
2587
2588 static int
2589 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2590 {
2591 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2592 int err = 0;
2593
2594 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2595 return -EINVAL;
2596
2597 if (new_mtu > 1500 && !adapter->jumbo_frame)
2598 return -EINVAL;
2599
2600 netdev->mtu = new_mtu;
2601
2602 /*
2603 * Reset_work may be in the middle of resetting the device, wait for its
2604 * completion.
2605 */
2606 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2607 msleep(1);
2608
2609 if (netif_running(netdev)) {
2610 vmxnet3_quiesce_dev(adapter);
2611 vmxnet3_reset_dev(adapter);
2612
2613 /* we need to re-create the rx queue based on the new mtu */
2614 vmxnet3_rq_destroy_all(adapter);
2615 vmxnet3_adjust_rx_ring_size(adapter);
2616 err = vmxnet3_rq_create_all(adapter);
2617 if (err) {
2618 printk(KERN_ERR "%s: failed to re-create rx queues,"
2619 " error %d. Closing it.\n", netdev->name, err);
2620 goto out;
2621 }
2622
2623 err = vmxnet3_activate_dev(adapter);
2624 if (err) {
2625 printk(KERN_ERR "%s: failed to re-activate, error %d. "
2626 "Closing it\n", netdev->name, err);
2627 goto out;
2628 }
2629 }
2630
2631 out:
2632 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2633 if (err)
2634 vmxnet3_force_close(adapter);
2635
2636 return err;
2637 }
2638
2639
2640 static void
2641 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2642 {
2643 struct net_device *netdev = adapter->netdev;
2644
2645 netdev->features = NETIF_F_SG |
2646 NETIF_F_HW_CSUM |
2647 NETIF_F_HW_VLAN_TX |
2648 NETIF_F_HW_VLAN_RX |
2649 NETIF_F_HW_VLAN_FILTER |
2650 NETIF_F_TSO |
2651 NETIF_F_TSO6 |
2652 NETIF_F_LRO;
2653
2654 printk(KERN_INFO "features: sg csum vlan jf tso tsoIPv6 lro");
2655
2656 adapter->rxcsum = true;
2657 adapter->jumbo_frame = true;
2658 adapter->lro = true;
2659
2660 if (dma64) {
2661 netdev->features |= NETIF_F_HIGHDMA;
2662 printk(" highDMA");
2663 }
2664
2665 netdev->vlan_features = netdev->features;
2666 printk("\n");
2667 }
2668
2669
2670 static void
2671 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2672 {
2673 u32 tmp;
2674
2675 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2676 *(u32 *)mac = tmp;
2677
2678 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2679 mac[4] = tmp & 0xff;
2680 mac[5] = (tmp >> 8) & 0xff;
2681 }
2682
2683 #ifdef CONFIG_PCI_MSI
2684
2685 /*
2686 * Enable MSIx vectors.
2687 * Returns :
2688 * 0 on successful enabling of required vectors,
2689 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
2690 * could be enabled.
2691 * number of vectors which can be enabled otherwise (this number is smaller
2692 * than VMXNET3_LINUX_MIN_MSIX_VECT)
2693 */
2694
2695 static int
2696 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
2697 int vectors)
2698 {
2699 int err = 0, vector_threshold;
2700 vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
2701
2702 while (vectors >= vector_threshold) {
2703 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
2704 vectors);
2705 if (!err) {
2706 adapter->intr.num_intrs = vectors;
2707 return 0;
2708 } else if (err < 0) {
2709 printk(KERN_ERR "Failed to enable MSI-X for %s, error"
2710 " %d\n", adapter->netdev->name, err);
2711 vectors = 0;
2712 } else if (err < vector_threshold) {
2713 break;
2714 } else {
2715 /* If fails to enable required number of MSI-x vectors
2716 * try enabling minimum number of vectors required.
2717 */
2718 vectors = vector_threshold;
2719 printk(KERN_ERR "Failed to enable %d MSI-X for %s, try"
2720 " %d instead\n", vectors, adapter->netdev->name,
2721 vector_threshold);
2722 }
2723 }
2724
2725 printk(KERN_INFO "Number of MSI-X interrupts which can be allocatedi"
2726 " are lower than min threshold required.\n");
2727 return err;
2728 }
2729
2730
2731 #endif /* CONFIG_PCI_MSI */
2732
2733 static void
2734 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2735 {
2736 u32 cfg;
2737 unsigned long flags;
2738
2739 /* intr settings */
2740 spin_lock_irqsave(&adapter->cmd_lock, flags);
2741 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2742 VMXNET3_CMD_GET_CONF_INTR);
2743 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2744 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2745 adapter->intr.type = cfg & 0x3;
2746 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2747
2748 if (adapter->intr.type == VMXNET3_IT_AUTO) {
2749 adapter->intr.type = VMXNET3_IT_MSIX;
2750 }
2751
2752 #ifdef CONFIG_PCI_MSI
2753 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2754 int vector, err = 0;
2755
2756 adapter->intr.num_intrs = (adapter->share_intr ==
2757 VMXNET3_INTR_TXSHARE) ? 1 :
2758 adapter->num_tx_queues;
2759 adapter->intr.num_intrs += (adapter->share_intr ==
2760 VMXNET3_INTR_BUDDYSHARE) ? 0 :
2761 adapter->num_rx_queues;
2762 adapter->intr.num_intrs += 1; /* for link event */
2763
2764 adapter->intr.num_intrs = (adapter->intr.num_intrs >
2765 VMXNET3_LINUX_MIN_MSIX_VECT
2766 ? adapter->intr.num_intrs :
2767 VMXNET3_LINUX_MIN_MSIX_VECT);
2768
2769 for (vector = 0; vector < adapter->intr.num_intrs; vector++)
2770 adapter->intr.msix_entries[vector].entry = vector;
2771
2772 err = vmxnet3_acquire_msix_vectors(adapter,
2773 adapter->intr.num_intrs);
2774 /* If we cannot allocate one MSIx vector per queue
2775 * then limit the number of rx queues to 1
2776 */
2777 if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
2778 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2779 || adapter->num_rx_queues != 1) {
2780 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2781 printk(KERN_ERR "Number of rx queues : 1\n");
2782 adapter->num_rx_queues = 1;
2783 adapter->intr.num_intrs =
2784 VMXNET3_LINUX_MIN_MSIX_VECT;
2785 }
2786 return;
2787 }
2788 if (!err)
2789 return;
2790
2791 /* If we cannot allocate MSIx vectors use only one rx queue */
2792 printk(KERN_INFO "Failed to enable MSI-X for %s, error %d."
2793 "#rx queues : 1, try MSI\n", adapter->netdev->name, err);
2794
2795 adapter->intr.type = VMXNET3_IT_MSI;
2796 }
2797
2798 if (adapter->intr.type == VMXNET3_IT_MSI) {
2799 int err;
2800 err = pci_enable_msi(adapter->pdev);
2801 if (!err) {
2802 adapter->num_rx_queues = 1;
2803 adapter->intr.num_intrs = 1;
2804 return;
2805 }
2806 }
2807 #endif /* CONFIG_PCI_MSI */
2808
2809 adapter->num_rx_queues = 1;
2810 printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n");
2811 adapter->intr.type = VMXNET3_IT_INTX;
2812
2813 /* INT-X related setting */
2814 adapter->intr.num_intrs = 1;
2815 }
2816
2817
2818 static void
2819 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
2820 {
2821 if (adapter->intr.type == VMXNET3_IT_MSIX)
2822 pci_disable_msix(adapter->pdev);
2823 else if (adapter->intr.type == VMXNET3_IT_MSI)
2824 pci_disable_msi(adapter->pdev);
2825 else
2826 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
2827 }
2828
2829
2830 static void
2831 vmxnet3_tx_timeout(struct net_device *netdev)
2832 {
2833 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2834 adapter->tx_timeout_count++;
2835
2836 printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
2837 schedule_work(&adapter->work);
2838 netif_wake_queue(adapter->netdev);
2839 }
2840
2841
2842 static void
2843 vmxnet3_reset_work(struct work_struct *data)
2844 {
2845 struct vmxnet3_adapter *adapter;
2846
2847 adapter = container_of(data, struct vmxnet3_adapter, work);
2848
2849 /* if another thread is resetting the device, no need to proceed */
2850 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2851 return;
2852
2853 /* if the device is closed, we must leave it alone */
2854 rtnl_lock();
2855 if (netif_running(adapter->netdev)) {
2856 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name);
2857 vmxnet3_quiesce_dev(adapter);
2858 vmxnet3_reset_dev(adapter);
2859 vmxnet3_activate_dev(adapter);
2860 } else {
2861 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name);
2862 }
2863 rtnl_unlock();
2864
2865 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2866 }
2867
2868
2869 static int __devinit
2870 vmxnet3_probe_device(struct pci_dev *pdev,
2871 const struct pci_device_id *id)
2872 {
2873 static const struct net_device_ops vmxnet3_netdev_ops = {
2874 .ndo_open = vmxnet3_open,
2875 .ndo_stop = vmxnet3_close,
2876 .ndo_start_xmit = vmxnet3_xmit_frame,
2877 .ndo_set_mac_address = vmxnet3_set_mac_addr,
2878 .ndo_change_mtu = vmxnet3_change_mtu,
2879 .ndo_get_stats = vmxnet3_get_stats,
2880 .ndo_tx_timeout = vmxnet3_tx_timeout,
2881 .ndo_set_multicast_list = vmxnet3_set_mc,
2882 .ndo_vlan_rx_register = vmxnet3_vlan_rx_register,
2883 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
2884 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
2885 #ifdef CONFIG_NET_POLL_CONTROLLER
2886 .ndo_poll_controller = vmxnet3_netpoll,
2887 #endif
2888 };
2889 int err;
2890 bool dma64 = false; /* stupid gcc */
2891 u32 ver;
2892 struct net_device *netdev;
2893 struct vmxnet3_adapter *adapter;
2894 u8 mac[ETH_ALEN];
2895 int size;
2896 int num_tx_queues;
2897 int num_rx_queues;
2898
2899 #ifdef VMXNET3_RSS
2900 if (enable_mq)
2901 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
2902 (int)num_online_cpus());
2903 else
2904 #endif
2905 num_rx_queues = 1;
2906
2907 if (enable_mq)
2908 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
2909 (int)num_online_cpus());
2910 else
2911 num_tx_queues = 1;
2912
2913 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
2914 max(num_tx_queues, num_rx_queues));
2915 printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
2916 num_tx_queues, num_rx_queues);
2917
2918 if (!netdev) {
2919 printk(KERN_ERR "Failed to alloc ethernet device for adapter "
2920 "%s\n", pci_name(pdev));
2921 return -ENOMEM;
2922 }
2923
2924 pci_set_drvdata(pdev, netdev);
2925 adapter = netdev_priv(netdev);
2926 adapter->netdev = netdev;
2927 adapter->pdev = pdev;
2928
2929 spin_lock_init(&adapter->cmd_lock);
2930 adapter->shared = pci_alloc_consistent(adapter->pdev,
2931 sizeof(struct Vmxnet3_DriverShared),
2932 &adapter->shared_pa);
2933 if (!adapter->shared) {
2934 printk(KERN_ERR "Failed to allocate memory for %s\n",
2935 pci_name(pdev));
2936 err = -ENOMEM;
2937 goto err_alloc_shared;
2938 }
2939
2940 adapter->num_rx_queues = num_rx_queues;
2941 adapter->num_tx_queues = num_tx_queues;
2942
2943 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
2944 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
2945 adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
2946 &adapter->queue_desc_pa);
2947
2948 if (!adapter->tqd_start) {
2949 printk(KERN_ERR "Failed to allocate memory for %s\n",
2950 pci_name(pdev));
2951 err = -ENOMEM;
2952 goto err_alloc_queue_desc;
2953 }
2954 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
2955 adapter->num_tx_queues);
2956
2957 adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
2958 if (adapter->pm_conf == NULL) {
2959 printk(KERN_ERR "Failed to allocate memory for %s\n",
2960 pci_name(pdev));
2961 err = -ENOMEM;
2962 goto err_alloc_pm;
2963 }
2964
2965 #ifdef VMXNET3_RSS
2966
2967 adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL);
2968 if (adapter->rss_conf == NULL) {
2969 printk(KERN_ERR "Failed to allocate memory for %s\n",
2970 pci_name(pdev));
2971 err = -ENOMEM;
2972 goto err_alloc_rss;
2973 }
2974 #endif /* VMXNET3_RSS */
2975
2976 err = vmxnet3_alloc_pci_resources(adapter, &dma64);
2977 if (err < 0)
2978 goto err_alloc_pci;
2979
2980 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
2981 if (ver & 1) {
2982 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
2983 } else {
2984 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter"
2985 " %s\n", ver, pci_name(pdev));
2986 err = -EBUSY;
2987 goto err_ver;
2988 }
2989
2990 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
2991 if (ver & 1) {
2992 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
2993 } else {
2994 printk(KERN_ERR "Incompatible upt version (0x%x) for "
2995 "adapter %s\n", ver, pci_name(pdev));
2996 err = -EBUSY;
2997 goto err_ver;
2998 }
2999
3000 vmxnet3_declare_features(adapter, dma64);
3001
3002 adapter->dev_number = atomic_read(&devices_found);
3003
3004 adapter->share_intr = irq_share_mode;
3005 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE &&
3006 adapter->num_tx_queues != adapter->num_rx_queues)
3007 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3008
3009 vmxnet3_alloc_intr_resources(adapter);
3010
3011 #ifdef VMXNET3_RSS
3012 if (adapter->num_rx_queues > 1 &&
3013 adapter->intr.type == VMXNET3_IT_MSIX) {
3014 adapter->rss = true;
3015 printk(KERN_INFO "RSS is enabled.\n");
3016 } else {
3017 adapter->rss = false;
3018 }
3019 #endif
3020
3021 vmxnet3_read_mac_addr(adapter, mac);
3022 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3023
3024 netdev->netdev_ops = &vmxnet3_netdev_ops;
3025 vmxnet3_set_ethtool_ops(netdev);
3026 netdev->watchdog_timeo = 5 * HZ;
3027
3028 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3029
3030 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3031 int i;
3032 for (i = 0; i < adapter->num_rx_queues; i++) {
3033 netif_napi_add(adapter->netdev,
3034 &adapter->rx_queue[i].napi,
3035 vmxnet3_poll_rx_only, 64);
3036 }
3037 } else {
3038 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3039 vmxnet3_poll, 64);
3040 }
3041
3042 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3043 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3044
3045 SET_NETDEV_DEV(netdev, &pdev->dev);
3046 err = register_netdev(netdev);
3047
3048 if (err) {
3049 printk(KERN_ERR "Failed to register adapter %s\n",
3050 pci_name(pdev));
3051 goto err_register;
3052 }
3053
3054 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3055 vmxnet3_check_link(adapter, false);
3056 atomic_inc(&devices_found);
3057 return 0;
3058
3059 err_register:
3060 vmxnet3_free_intr_resources(adapter);
3061 err_ver:
3062 vmxnet3_free_pci_resources(adapter);
3063 err_alloc_pci:
3064 #ifdef VMXNET3_RSS
3065 kfree(adapter->rss_conf);
3066 err_alloc_rss:
3067 #endif
3068 kfree(adapter->pm_conf);
3069 err_alloc_pm:
3070 pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3071 adapter->queue_desc_pa);
3072 err_alloc_queue_desc:
3073 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3074 adapter->shared, adapter->shared_pa);
3075 err_alloc_shared:
3076 pci_set_drvdata(pdev, NULL);
3077 free_netdev(netdev);
3078 return err;
3079 }
3080
3081
3082 static void __devexit
3083 vmxnet3_remove_device(struct pci_dev *pdev)
3084 {
3085 struct net_device *netdev = pci_get_drvdata(pdev);
3086 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3087 int size = 0;
3088 int num_rx_queues;
3089
3090 #ifdef VMXNET3_RSS
3091 if (enable_mq)
3092 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3093 (int)num_online_cpus());
3094 else
3095 #endif
3096 num_rx_queues = 1;
3097
3098 cancel_work_sync(&adapter->work);
3099
3100 unregister_netdev(netdev);
3101
3102 vmxnet3_free_intr_resources(adapter);
3103 vmxnet3_free_pci_resources(adapter);
3104 #ifdef VMXNET3_RSS
3105 kfree(adapter->rss_conf);
3106 #endif
3107 kfree(adapter->pm_conf);
3108
3109 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3110 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3111 pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3112 adapter->queue_desc_pa);
3113 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3114 adapter->shared, adapter->shared_pa);
3115 free_netdev(netdev);
3116 }
3117
3118
3119 #ifdef CONFIG_PM
3120
3121 static int
3122 vmxnet3_suspend(struct device *device)
3123 {
3124 struct pci_dev *pdev = to_pci_dev(device);
3125 struct net_device *netdev = pci_get_drvdata(pdev);
3126 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3127 struct Vmxnet3_PMConf *pmConf;
3128 struct ethhdr *ehdr;
3129 struct arphdr *ahdr;
3130 u8 *arpreq;
3131 struct in_device *in_dev;
3132 struct in_ifaddr *ifa;
3133 unsigned long flags;
3134 int i = 0;
3135
3136 if (!netif_running(netdev))
3137 return 0;
3138
3139 for (i = 0; i < adapter->num_rx_queues; i++)
3140 napi_disable(&adapter->rx_queue[i].napi);
3141
3142 vmxnet3_disable_all_intrs(adapter);
3143 vmxnet3_free_irqs(adapter);
3144 vmxnet3_free_intr_resources(adapter);
3145
3146 netif_device_detach(netdev);
3147 netif_tx_stop_all_queues(netdev);
3148
3149 /* Create wake-up filters. */
3150 pmConf = adapter->pm_conf;
3151 memset(pmConf, 0, sizeof(*pmConf));
3152
3153 if (adapter->wol & WAKE_UCAST) {
3154 pmConf->filters[i].patternSize = ETH_ALEN;
3155 pmConf->filters[i].maskSize = 1;
3156 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3157 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3158
3159 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3160 i++;
3161 }
3162
3163 if (adapter->wol & WAKE_ARP) {
3164 in_dev = in_dev_get(netdev);
3165 if (!in_dev)
3166 goto skip_arp;
3167
3168 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3169 if (!ifa)
3170 goto skip_arp;
3171
3172 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3173 sizeof(struct arphdr) + /* ARP header */
3174 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3175 2 * sizeof(u32); /*2 IPv4 addresses */
3176 pmConf->filters[i].maskSize =
3177 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3178
3179 /* ETH_P_ARP in Ethernet header. */
3180 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3181 ehdr->h_proto = htons(ETH_P_ARP);
3182
3183 /* ARPOP_REQUEST in ARP header. */
3184 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3185 ahdr->ar_op = htons(ARPOP_REQUEST);
3186 arpreq = (u8 *)(ahdr + 1);
3187
3188 /* The Unicast IPv4 address in 'tip' field. */
3189 arpreq += 2 * ETH_ALEN + sizeof(u32);
3190 *(u32 *)arpreq = ifa->ifa_address;
3191
3192 /* The mask for the relevant bits. */
3193 pmConf->filters[i].mask[0] = 0x00;
3194 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3195 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3196 pmConf->filters[i].mask[3] = 0x00;
3197 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3198 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3199 in_dev_put(in_dev);
3200
3201 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3202 i++;
3203 }
3204
3205 skip_arp:
3206 if (adapter->wol & WAKE_MAGIC)
3207 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3208
3209 pmConf->numFilters = i;
3210
3211 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3212 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3213 *pmConf));
3214 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3215 pmConf));
3216
3217 spin_lock_irqsave(&adapter->cmd_lock, flags);
3218 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3219 VMXNET3_CMD_UPDATE_PMCFG);
3220 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3221
3222 pci_save_state(pdev);
3223 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3224 adapter->wol);
3225 pci_disable_device(pdev);
3226 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3227
3228 return 0;
3229 }
3230
3231
3232 static int
3233 vmxnet3_resume(struct device *device)
3234 {
3235 int err, i = 0;
3236 unsigned long flags;
3237 struct pci_dev *pdev = to_pci_dev(device);
3238 struct net_device *netdev = pci_get_drvdata(pdev);
3239 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3240 struct Vmxnet3_PMConf *pmConf;
3241
3242 if (!netif_running(netdev))
3243 return 0;
3244
3245 /* Destroy wake-up filters. */
3246 pmConf = adapter->pm_conf;
3247 memset(pmConf, 0, sizeof(*pmConf));
3248
3249 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3250 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3251 *pmConf));
3252 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3253 pmConf));
3254
3255 netif_device_attach(netdev);
3256 pci_set_power_state(pdev, PCI_D0);
3257 pci_restore_state(pdev);
3258 err = pci_enable_device_mem(pdev);
3259 if (err != 0)
3260 return err;
3261
3262 pci_enable_wake(pdev, PCI_D0, 0);
3263
3264 spin_lock_irqsave(&adapter->cmd_lock, flags);
3265 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3266 VMXNET3_CMD_UPDATE_PMCFG);
3267 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3268 vmxnet3_alloc_intr_resources(adapter);
3269 vmxnet3_request_irqs(adapter);
3270 for (i = 0; i < adapter->num_rx_queues; i++)
3271 napi_enable(&adapter->rx_queue[i].napi);
3272 vmxnet3_enable_all_intrs(adapter);
3273
3274 return 0;
3275 }
3276
3277 static const struct dev_pm_ops vmxnet3_pm_ops = {
3278 .suspend = vmxnet3_suspend,
3279 .resume = vmxnet3_resume,
3280 };
3281 #endif
3282
3283 static struct pci_driver vmxnet3_driver = {
3284 .name = vmxnet3_driver_name,
3285 .id_table = vmxnet3_pciid_table,
3286 .probe = vmxnet3_probe_device,
3287 .remove = __devexit_p(vmxnet3_remove_device),
3288 #ifdef CONFIG_PM
3289 .driver.pm = &vmxnet3_pm_ops,
3290 #endif
3291 };
3292
3293
3294 static int __init
3295 vmxnet3_init_module(void)
3296 {
3297 printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
3298 VMXNET3_DRIVER_VERSION_REPORT);
3299 return pci_register_driver(&vmxnet3_driver);
3300 }
3301
3302 module_init(vmxnet3_init_module);
3303
3304
3305 static void
3306 vmxnet3_exit_module(void)
3307 {
3308 pci_unregister_driver(&vmxnet3_driver);
3309 }
3310
3311 module_exit(vmxnet3_exit_module);
3312
3313 MODULE_AUTHOR("VMware, Inc.");
3314 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3315 MODULE_LICENSE("GPL v2");
3316 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
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