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Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2 * Linux driver for VMware's vmxnet3 ethernet NIC.
3 *
4 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * The full GNU General Public License is included in this distribution in
21 * the file called "COPYING".
22 *
23 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24 *
25 */
26
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29
30 #include "vmxnet3_int.h"
31
32 char vmxnet3_driver_name[] = "vmxnet3";
33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
34
35 /*
36 * PCI Device ID Table
37 * Last entry must be all 0s
38 */
39 static DEFINE_PCI_DEVICE_TABLE(vmxnet3_pciid_table) = {
40 {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
41 {0}
42 };
43
44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
45
46 static atomic_t devices_found;
47
48 #define VMXNET3_MAX_DEVICES 10
49 static int enable_mq = 1;
50 static int irq_share_mode;
51
52 static void
53 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
54
55 /*
56 * Enable/Disable the given intr
57 */
58 static void
59 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
60 {
61 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
62 }
63
64
65 static void
66 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
67 {
68 VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
69 }
70
71
72 /*
73 * Enable/Disable all intrs used by the device
74 */
75 static void
76 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
77 {
78 int i;
79
80 for (i = 0; i < adapter->intr.num_intrs; i++)
81 vmxnet3_enable_intr(adapter, i);
82 adapter->shared->devRead.intrConf.intrCtrl &=
83 cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
84 }
85
86
87 static void
88 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
89 {
90 int i;
91
92 adapter->shared->devRead.intrConf.intrCtrl |=
93 cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
94 for (i = 0; i < adapter->intr.num_intrs; i++)
95 vmxnet3_disable_intr(adapter, i);
96 }
97
98
99 static void
100 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
101 {
102 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
103 }
104
105
106 static bool
107 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
108 {
109 return tq->stopped;
110 }
111
112
113 static void
114 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
115 {
116 tq->stopped = false;
117 netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
118 }
119
120
121 static void
122 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
123 {
124 tq->stopped = false;
125 netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
126 }
127
128
129 static void
130 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
131 {
132 tq->stopped = true;
133 tq->num_stop++;
134 netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
135 }
136
137
138 /*
139 * Check the link state. This may start or stop the tx queue.
140 */
141 static void
142 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
143 {
144 u32 ret;
145 int i;
146 unsigned long flags;
147
148 spin_lock_irqsave(&adapter->cmd_lock, flags);
149 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
150 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
151 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
152
153 adapter->link_speed = ret >> 16;
154 if (ret & 1) { /* Link is up. */
155 printk(KERN_INFO "%s: NIC Link is Up %d Mbps\n",
156 adapter->netdev->name, adapter->link_speed);
157 if (!netif_carrier_ok(adapter->netdev))
158 netif_carrier_on(adapter->netdev);
159
160 if (affectTxQueue) {
161 for (i = 0; i < adapter->num_tx_queues; i++)
162 vmxnet3_tq_start(&adapter->tx_queue[i],
163 adapter);
164 }
165 } else {
166 printk(KERN_INFO "%s: NIC Link is Down\n",
167 adapter->netdev->name);
168 if (netif_carrier_ok(adapter->netdev))
169 netif_carrier_off(adapter->netdev);
170
171 if (affectTxQueue) {
172 for (i = 0; i < adapter->num_tx_queues; i++)
173 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
174 }
175 }
176 }
177
178 static void
179 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
180 {
181 int i;
182 unsigned long flags;
183 u32 events = le32_to_cpu(adapter->shared->ecr);
184 if (!events)
185 return;
186
187 vmxnet3_ack_events(adapter, events);
188
189 /* Check if link state has changed */
190 if (events & VMXNET3_ECR_LINK)
191 vmxnet3_check_link(adapter, true);
192
193 /* Check if there is an error on xmit/recv queues */
194 if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
195 spin_lock_irqsave(&adapter->cmd_lock, flags);
196 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
197 VMXNET3_CMD_GET_QUEUE_STATUS);
198 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
199
200 for (i = 0; i < adapter->num_tx_queues; i++)
201 if (adapter->tqd_start[i].status.stopped)
202 dev_err(&adapter->netdev->dev,
203 "%s: tq[%d] error 0x%x\n",
204 adapter->netdev->name, i, le32_to_cpu(
205 adapter->tqd_start[i].status.error));
206 for (i = 0; i < adapter->num_rx_queues; i++)
207 if (adapter->rqd_start[i].status.stopped)
208 dev_err(&adapter->netdev->dev,
209 "%s: rq[%d] error 0x%x\n",
210 adapter->netdev->name, i,
211 adapter->rqd_start[i].status.error);
212
213 schedule_work(&adapter->work);
214 }
215 }
216
217 #ifdef __BIG_ENDIAN_BITFIELD
218 /*
219 * The device expects the bitfields in shared structures to be written in
220 * little endian. When CPU is big endian, the following routines are used to
221 * correctly read and write into ABI.
222 * The general technique used here is : double word bitfields are defined in
223 * opposite order for big endian architecture. Then before reading them in
224 * driver the complete double word is translated using le32_to_cpu. Similarly
225 * After the driver writes into bitfields, cpu_to_le32 is used to translate the
226 * double words into required format.
227 * In order to avoid touching bits in shared structure more than once, temporary
228 * descriptors are used. These are passed as srcDesc to following functions.
229 */
230 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
231 struct Vmxnet3_RxDesc *dstDesc)
232 {
233 u32 *src = (u32 *)srcDesc + 2;
234 u32 *dst = (u32 *)dstDesc + 2;
235 dstDesc->addr = le64_to_cpu(srcDesc->addr);
236 *dst = le32_to_cpu(*src);
237 dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
238 }
239
240 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
241 struct Vmxnet3_TxDesc *dstDesc)
242 {
243 int i;
244 u32 *src = (u32 *)(srcDesc + 1);
245 u32 *dst = (u32 *)(dstDesc + 1);
246
247 /* Working backwards so that the gen bit is set at the end. */
248 for (i = 2; i > 0; i--) {
249 src--;
250 dst--;
251 *dst = cpu_to_le32(*src);
252 }
253 }
254
255
256 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
257 struct Vmxnet3_RxCompDesc *dstDesc)
258 {
259 int i = 0;
260 u32 *src = (u32 *)srcDesc;
261 u32 *dst = (u32 *)dstDesc;
262 for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
263 *dst = le32_to_cpu(*src);
264 src++;
265 dst++;
266 }
267 }
268
269
270 /* Used to read bitfield values from double words. */
271 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
272 {
273 u32 temp = le32_to_cpu(*bitfield);
274 u32 mask = ((1 << size) - 1) << pos;
275 temp &= mask;
276 temp >>= pos;
277 return temp;
278 }
279
280
281
282 #endif /* __BIG_ENDIAN_BITFIELD */
283
284 #ifdef __BIG_ENDIAN_BITFIELD
285
286 # define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
287 txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
288 VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
289 # define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
290 txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
291 VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
292 # define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
293 VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
294 VMXNET3_TCD_GEN_SIZE)
295 # define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
296 VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
297 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
298 (dstrcd) = (tmp); \
299 vmxnet3_RxCompToCPU((rcd), (tmp)); \
300 } while (0)
301 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
302 (dstrxd) = (tmp); \
303 vmxnet3_RxDescToCPU((rxd), (tmp)); \
304 } while (0)
305
306 #else
307
308 # define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
309 # define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
310 # define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
311 # define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
312 # define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
313 # define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
314
315 #endif /* __BIG_ENDIAN_BITFIELD */
316
317
318 static void
319 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
320 struct pci_dev *pdev)
321 {
322 if (tbi->map_type == VMXNET3_MAP_SINGLE)
323 pci_unmap_single(pdev, tbi->dma_addr, tbi->len,
324 PCI_DMA_TODEVICE);
325 else if (tbi->map_type == VMXNET3_MAP_PAGE)
326 pci_unmap_page(pdev, tbi->dma_addr, tbi->len,
327 PCI_DMA_TODEVICE);
328 else
329 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
330
331 tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
332 }
333
334
335 static int
336 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
337 struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
338 {
339 struct sk_buff *skb;
340 int entries = 0;
341
342 /* no out of order completion */
343 BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
344 BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
345
346 skb = tq->buf_info[eop_idx].skb;
347 BUG_ON(skb == NULL);
348 tq->buf_info[eop_idx].skb = NULL;
349
350 VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
351
352 while (tq->tx_ring.next2comp != eop_idx) {
353 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
354 pdev);
355
356 /* update next2comp w/o tx_lock. Since we are marking more,
357 * instead of less, tx ring entries avail, the worst case is
358 * that the tx routine incorrectly re-queues a pkt due to
359 * insufficient tx ring entries.
360 */
361 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
362 entries++;
363 }
364
365 dev_kfree_skb_any(skb);
366 return entries;
367 }
368
369
370 static int
371 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
372 struct vmxnet3_adapter *adapter)
373 {
374 int completed = 0;
375 union Vmxnet3_GenericDesc *gdesc;
376
377 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
378 while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
379 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
380 &gdesc->tcd), tq, adapter->pdev,
381 adapter);
382
383 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
384 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
385 }
386
387 if (completed) {
388 spin_lock(&tq->tx_lock);
389 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
390 vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
391 VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
392 netif_carrier_ok(adapter->netdev))) {
393 vmxnet3_tq_wake(tq, adapter);
394 }
395 spin_unlock(&tq->tx_lock);
396 }
397 return completed;
398 }
399
400
401 static void
402 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
403 struct vmxnet3_adapter *adapter)
404 {
405 int i;
406
407 while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
408 struct vmxnet3_tx_buf_info *tbi;
409
410 tbi = tq->buf_info + tq->tx_ring.next2comp;
411
412 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
413 if (tbi->skb) {
414 dev_kfree_skb_any(tbi->skb);
415 tbi->skb = NULL;
416 }
417 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
418 }
419
420 /* sanity check, verify all buffers are indeed unmapped and freed */
421 for (i = 0; i < tq->tx_ring.size; i++) {
422 BUG_ON(tq->buf_info[i].skb != NULL ||
423 tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
424 }
425
426 tq->tx_ring.gen = VMXNET3_INIT_GEN;
427 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
428
429 tq->comp_ring.gen = VMXNET3_INIT_GEN;
430 tq->comp_ring.next2proc = 0;
431 }
432
433
434 static void
435 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
436 struct vmxnet3_adapter *adapter)
437 {
438 if (tq->tx_ring.base) {
439 pci_free_consistent(adapter->pdev, tq->tx_ring.size *
440 sizeof(struct Vmxnet3_TxDesc),
441 tq->tx_ring.base, tq->tx_ring.basePA);
442 tq->tx_ring.base = NULL;
443 }
444 if (tq->data_ring.base) {
445 pci_free_consistent(adapter->pdev, tq->data_ring.size *
446 sizeof(struct Vmxnet3_TxDataDesc),
447 tq->data_ring.base, tq->data_ring.basePA);
448 tq->data_ring.base = NULL;
449 }
450 if (tq->comp_ring.base) {
451 pci_free_consistent(adapter->pdev, tq->comp_ring.size *
452 sizeof(struct Vmxnet3_TxCompDesc),
453 tq->comp_ring.base, tq->comp_ring.basePA);
454 tq->comp_ring.base = NULL;
455 }
456 kfree(tq->buf_info);
457 tq->buf_info = NULL;
458 }
459
460
461 /* Destroy all tx queues */
462 void
463 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
464 {
465 int i;
466
467 for (i = 0; i < adapter->num_tx_queues; i++)
468 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
469 }
470
471
472 static void
473 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
474 struct vmxnet3_adapter *adapter)
475 {
476 int i;
477
478 /* reset the tx ring contents to 0 and reset the tx ring states */
479 memset(tq->tx_ring.base, 0, tq->tx_ring.size *
480 sizeof(struct Vmxnet3_TxDesc));
481 tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
482 tq->tx_ring.gen = VMXNET3_INIT_GEN;
483
484 memset(tq->data_ring.base, 0, tq->data_ring.size *
485 sizeof(struct Vmxnet3_TxDataDesc));
486
487 /* reset the tx comp ring contents to 0 and reset comp ring states */
488 memset(tq->comp_ring.base, 0, tq->comp_ring.size *
489 sizeof(struct Vmxnet3_TxCompDesc));
490 tq->comp_ring.next2proc = 0;
491 tq->comp_ring.gen = VMXNET3_INIT_GEN;
492
493 /* reset the bookkeeping data */
494 memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
495 for (i = 0; i < tq->tx_ring.size; i++)
496 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
497
498 /* stats are not reset */
499 }
500
501
502 static int
503 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
504 struct vmxnet3_adapter *adapter)
505 {
506 BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
507 tq->comp_ring.base || tq->buf_info);
508
509 tq->tx_ring.base = pci_alloc_consistent(adapter->pdev, tq->tx_ring.size
510 * sizeof(struct Vmxnet3_TxDesc),
511 &tq->tx_ring.basePA);
512 if (!tq->tx_ring.base) {
513 printk(KERN_ERR "%s: failed to allocate tx ring\n",
514 adapter->netdev->name);
515 goto err;
516 }
517
518 tq->data_ring.base = pci_alloc_consistent(adapter->pdev,
519 tq->data_ring.size *
520 sizeof(struct Vmxnet3_TxDataDesc),
521 &tq->data_ring.basePA);
522 if (!tq->data_ring.base) {
523 printk(KERN_ERR "%s: failed to allocate data ring\n",
524 adapter->netdev->name);
525 goto err;
526 }
527
528 tq->comp_ring.base = pci_alloc_consistent(adapter->pdev,
529 tq->comp_ring.size *
530 sizeof(struct Vmxnet3_TxCompDesc),
531 &tq->comp_ring.basePA);
532 if (!tq->comp_ring.base) {
533 printk(KERN_ERR "%s: failed to allocate tx comp ring\n",
534 adapter->netdev->name);
535 goto err;
536 }
537
538 tq->buf_info = kcalloc(tq->tx_ring.size, sizeof(tq->buf_info[0]),
539 GFP_KERNEL);
540 if (!tq->buf_info)
541 goto err;
542
543 return 0;
544
545 err:
546 vmxnet3_tq_destroy(tq, adapter);
547 return -ENOMEM;
548 }
549
550 static void
551 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
552 {
553 int i;
554
555 for (i = 0; i < adapter->num_tx_queues; i++)
556 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
557 }
558
559 /*
560 * starting from ring->next2fill, allocate rx buffers for the given ring
561 * of the rx queue and update the rx desc. stop after @num_to_alloc buffers
562 * are allocated or allocation fails
563 */
564
565 static int
566 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
567 int num_to_alloc, struct vmxnet3_adapter *adapter)
568 {
569 int num_allocated = 0;
570 struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
571 struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
572 u32 val;
573
574 while (num_allocated <= num_to_alloc) {
575 struct vmxnet3_rx_buf_info *rbi;
576 union Vmxnet3_GenericDesc *gd;
577
578 rbi = rbi_base + ring->next2fill;
579 gd = ring->base + ring->next2fill;
580
581 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
582 if (rbi->skb == NULL) {
583 rbi->skb = dev_alloc_skb(rbi->len +
584 NET_IP_ALIGN);
585 if (unlikely(rbi->skb == NULL)) {
586 rq->stats.rx_buf_alloc_failure++;
587 break;
588 }
589 rbi->skb->dev = adapter->netdev;
590
591 skb_reserve(rbi->skb, NET_IP_ALIGN);
592 rbi->dma_addr = pci_map_single(adapter->pdev,
593 rbi->skb->data, rbi->len,
594 PCI_DMA_FROMDEVICE);
595 } else {
596 /* rx buffer skipped by the device */
597 }
598 val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
599 } else {
600 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
601 rbi->len != PAGE_SIZE);
602
603 if (rbi->page == NULL) {
604 rbi->page = alloc_page(GFP_ATOMIC);
605 if (unlikely(rbi->page == NULL)) {
606 rq->stats.rx_buf_alloc_failure++;
607 break;
608 }
609 rbi->dma_addr = pci_map_page(adapter->pdev,
610 rbi->page, 0, PAGE_SIZE,
611 PCI_DMA_FROMDEVICE);
612 } else {
613 /* rx buffers skipped by the device */
614 }
615 val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
616 }
617
618 BUG_ON(rbi->dma_addr == 0);
619 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
620 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
621 | val | rbi->len);
622
623 /* Fill the last buffer but dont mark it ready, or else the
624 * device will think that the queue is full */
625 if (num_allocated == num_to_alloc)
626 break;
627
628 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
629 num_allocated++;
630 vmxnet3_cmd_ring_adv_next2fill(ring);
631 }
632 rq->uncommitted[ring_idx] += num_allocated;
633
634 dev_dbg(&adapter->netdev->dev,
635 "alloc_rx_buf: %d allocated, next2fill %u, next2comp "
636 "%u, uncommitted %u\n", num_allocated, ring->next2fill,
637 ring->next2comp, rq->uncommitted[ring_idx]);
638
639 /* so that the device can distinguish a full ring and an empty ring */
640 BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
641
642 return num_allocated;
643 }
644
645
646 static void
647 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
648 struct vmxnet3_rx_buf_info *rbi)
649 {
650 struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
651 skb_shinfo(skb)->nr_frags;
652
653 BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
654
655 __skb_frag_set_page(frag, rbi->page);
656 frag->page_offset = 0;
657 skb_frag_size_set(frag, rcd->len);
658 skb->data_len += rcd->len;
659 skb->truesize += PAGE_SIZE;
660 skb_shinfo(skb)->nr_frags++;
661 }
662
663
664 static void
665 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
666 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
667 struct vmxnet3_adapter *adapter)
668 {
669 u32 dw2, len;
670 unsigned long buf_offset;
671 int i;
672 union Vmxnet3_GenericDesc *gdesc;
673 struct vmxnet3_tx_buf_info *tbi = NULL;
674
675 BUG_ON(ctx->copy_size > skb_headlen(skb));
676
677 /* use the previous gen bit for the SOP desc */
678 dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
679
680 ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
681 gdesc = ctx->sop_txd; /* both loops below can be skipped */
682
683 /* no need to map the buffer if headers are copied */
684 if (ctx->copy_size) {
685 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
686 tq->tx_ring.next2fill *
687 sizeof(struct Vmxnet3_TxDataDesc));
688 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
689 ctx->sop_txd->dword[3] = 0;
690
691 tbi = tq->buf_info + tq->tx_ring.next2fill;
692 tbi->map_type = VMXNET3_MAP_NONE;
693
694 dev_dbg(&adapter->netdev->dev,
695 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
696 tq->tx_ring.next2fill,
697 le64_to_cpu(ctx->sop_txd->txd.addr),
698 ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
699 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
700
701 /* use the right gen for non-SOP desc */
702 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
703 }
704
705 /* linear part can use multiple tx desc if it's big */
706 len = skb_headlen(skb) - ctx->copy_size;
707 buf_offset = ctx->copy_size;
708 while (len) {
709 u32 buf_size;
710
711 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
712 buf_size = len;
713 dw2 |= len;
714 } else {
715 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
716 /* spec says that for TxDesc.len, 0 == 2^14 */
717 }
718
719 tbi = tq->buf_info + tq->tx_ring.next2fill;
720 tbi->map_type = VMXNET3_MAP_SINGLE;
721 tbi->dma_addr = pci_map_single(adapter->pdev,
722 skb->data + buf_offset, buf_size,
723 PCI_DMA_TODEVICE);
724
725 tbi->len = buf_size;
726
727 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
728 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
729
730 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
731 gdesc->dword[2] = cpu_to_le32(dw2);
732 gdesc->dword[3] = 0;
733
734 dev_dbg(&adapter->netdev->dev,
735 "txd[%u]: 0x%Lx 0x%x 0x%x\n",
736 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
737 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
738 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
739 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
740
741 len -= buf_size;
742 buf_offset += buf_size;
743 }
744
745 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
746 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
747
748 tbi = tq->buf_info + tq->tx_ring.next2fill;
749 tbi->map_type = VMXNET3_MAP_PAGE;
750 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
751 0, skb_frag_size(frag),
752 DMA_TO_DEVICE);
753
754 tbi->len = skb_frag_size(frag);
755
756 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
757 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
758
759 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
760 gdesc->dword[2] = cpu_to_le32(dw2 | skb_frag_size(frag));
761 gdesc->dword[3] = 0;
762
763 dev_dbg(&adapter->netdev->dev,
764 "txd[%u]: 0x%llu %u %u\n",
765 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
766 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
767 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
768 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
769 }
770
771 ctx->eop_txd = gdesc;
772
773 /* set the last buf_info for the pkt */
774 tbi->skb = skb;
775 tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
776 }
777
778
779 /* Init all tx queues */
780 static void
781 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
782 {
783 int i;
784
785 for (i = 0; i < adapter->num_tx_queues; i++)
786 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
787 }
788
789
790 /*
791 * parse and copy relevant protocol headers:
792 * For a tso pkt, relevant headers are L2/3/4 including options
793 * For a pkt requesting csum offloading, they are L2/3 and may include L4
794 * if it's a TCP/UDP pkt
795 *
796 * Returns:
797 * -1: error happens during parsing
798 * 0: protocol headers parsed, but too big to be copied
799 * 1: protocol headers parsed and copied
800 *
801 * Other effects:
802 * 1. related *ctx fields are updated.
803 * 2. ctx->copy_size is # of bytes copied
804 * 3. the portion copied is guaranteed to be in the linear part
805 *
806 */
807 static int
808 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
809 struct vmxnet3_tx_ctx *ctx,
810 struct vmxnet3_adapter *adapter)
811 {
812 struct Vmxnet3_TxDataDesc *tdd;
813
814 if (ctx->mss) { /* TSO */
815 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
816 ctx->l4_hdr_size = tcp_hdrlen(skb);
817 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
818 } else {
819 if (skb->ip_summed == CHECKSUM_PARTIAL) {
820 ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
821
822 if (ctx->ipv4) {
823 const struct iphdr *iph = ip_hdr(skb);
824
825 if (iph->protocol == IPPROTO_TCP)
826 ctx->l4_hdr_size = tcp_hdrlen(skb);
827 else if (iph->protocol == IPPROTO_UDP)
828 ctx->l4_hdr_size = sizeof(struct udphdr);
829 else
830 ctx->l4_hdr_size = 0;
831 } else {
832 /* for simplicity, don't copy L4 headers */
833 ctx->l4_hdr_size = 0;
834 }
835 ctx->copy_size = min(ctx->eth_ip_hdr_size +
836 ctx->l4_hdr_size, skb->len);
837 } else {
838 ctx->eth_ip_hdr_size = 0;
839 ctx->l4_hdr_size = 0;
840 /* copy as much as allowed */
841 ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
842 , skb_headlen(skb));
843 }
844
845 /* make sure headers are accessible directly */
846 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
847 goto err;
848 }
849
850 if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
851 tq->stats.oversized_hdr++;
852 ctx->copy_size = 0;
853 return 0;
854 }
855
856 tdd = tq->data_ring.base + tq->tx_ring.next2fill;
857
858 memcpy(tdd->data, skb->data, ctx->copy_size);
859 dev_dbg(&adapter->netdev->dev,
860 "copy %u bytes to dataRing[%u]\n",
861 ctx->copy_size, tq->tx_ring.next2fill);
862 return 1;
863
864 err:
865 return -1;
866 }
867
868
869 static void
870 vmxnet3_prepare_tso(struct sk_buff *skb,
871 struct vmxnet3_tx_ctx *ctx)
872 {
873 struct tcphdr *tcph = tcp_hdr(skb);
874
875 if (ctx->ipv4) {
876 struct iphdr *iph = ip_hdr(skb);
877
878 iph->check = 0;
879 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
880 IPPROTO_TCP, 0);
881 } else {
882 struct ipv6hdr *iph = ipv6_hdr(skb);
883
884 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
885 IPPROTO_TCP, 0);
886 }
887 }
888
889
890 /*
891 * Transmits a pkt thru a given tq
892 * Returns:
893 * NETDEV_TX_OK: descriptors are setup successfully
894 * NETDEV_TX_OK: error occurred, the pkt is dropped
895 * NETDEV_TX_BUSY: tx ring is full, queue is stopped
896 *
897 * Side-effects:
898 * 1. tx ring may be changed
899 * 2. tq stats may be updated accordingly
900 * 3. shared->txNumDeferred may be updated
901 */
902
903 static int
904 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
905 struct vmxnet3_adapter *adapter, struct net_device *netdev)
906 {
907 int ret;
908 u32 count;
909 unsigned long flags;
910 struct vmxnet3_tx_ctx ctx;
911 union Vmxnet3_GenericDesc *gdesc;
912 #ifdef __BIG_ENDIAN_BITFIELD
913 /* Use temporary descriptor to avoid touching bits multiple times */
914 union Vmxnet3_GenericDesc tempTxDesc;
915 #endif
916
917 /* conservatively estimate # of descriptors to use */
918 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) +
919 skb_shinfo(skb)->nr_frags + 1;
920
921 ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
922
923 ctx.mss = skb_shinfo(skb)->gso_size;
924 if (ctx.mss) {
925 if (skb_header_cloned(skb)) {
926 if (unlikely(pskb_expand_head(skb, 0, 0,
927 GFP_ATOMIC) != 0)) {
928 tq->stats.drop_tso++;
929 goto drop_pkt;
930 }
931 tq->stats.copy_skb_header++;
932 }
933 vmxnet3_prepare_tso(skb, &ctx);
934 } else {
935 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
936
937 /* non-tso pkts must not use more than
938 * VMXNET3_MAX_TXD_PER_PKT entries
939 */
940 if (skb_linearize(skb) != 0) {
941 tq->stats.drop_too_many_frags++;
942 goto drop_pkt;
943 }
944 tq->stats.linearized++;
945
946 /* recalculate the # of descriptors to use */
947 count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
948 }
949 }
950
951 spin_lock_irqsave(&tq->tx_lock, flags);
952
953 if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
954 tq->stats.tx_ring_full++;
955 dev_dbg(&adapter->netdev->dev,
956 "tx queue stopped on %s, next2comp %u"
957 " next2fill %u\n", adapter->netdev->name,
958 tq->tx_ring.next2comp, tq->tx_ring.next2fill);
959
960 vmxnet3_tq_stop(tq, adapter);
961 spin_unlock_irqrestore(&tq->tx_lock, flags);
962 return NETDEV_TX_BUSY;
963 }
964
965
966 ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
967 if (ret >= 0) {
968 BUG_ON(ret <= 0 && ctx.copy_size != 0);
969 /* hdrs parsed, check against other limits */
970 if (ctx.mss) {
971 if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
972 VMXNET3_MAX_TX_BUF_SIZE)) {
973 goto hdr_too_big;
974 }
975 } else {
976 if (skb->ip_summed == CHECKSUM_PARTIAL) {
977 if (unlikely(ctx.eth_ip_hdr_size +
978 skb->csum_offset >
979 VMXNET3_MAX_CSUM_OFFSET)) {
980 goto hdr_too_big;
981 }
982 }
983 }
984 } else {
985 tq->stats.drop_hdr_inspect_err++;
986 goto unlock_drop_pkt;
987 }
988
989 /* fill tx descs related to addr & len */
990 vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
991
992 /* setup the EOP desc */
993 ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
994
995 /* setup the SOP desc */
996 #ifdef __BIG_ENDIAN_BITFIELD
997 gdesc = &tempTxDesc;
998 gdesc->dword[2] = ctx.sop_txd->dword[2];
999 gdesc->dword[3] = ctx.sop_txd->dword[3];
1000 #else
1001 gdesc = ctx.sop_txd;
1002 #endif
1003 if (ctx.mss) {
1004 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1005 gdesc->txd.om = VMXNET3_OM_TSO;
1006 gdesc->txd.msscof = ctx.mss;
1007 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1008 gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1009 } else {
1010 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1011 gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1012 gdesc->txd.om = VMXNET3_OM_CSUM;
1013 gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1014 skb->csum_offset;
1015 } else {
1016 gdesc->txd.om = 0;
1017 gdesc->txd.msscof = 0;
1018 }
1019 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1020 }
1021
1022 if (vlan_tx_tag_present(skb)) {
1023 gdesc->txd.ti = 1;
1024 gdesc->txd.tci = vlan_tx_tag_get(skb);
1025 }
1026
1027 /* finally flips the GEN bit of the SOP desc. */
1028 gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1029 VMXNET3_TXD_GEN);
1030 #ifdef __BIG_ENDIAN_BITFIELD
1031 /* Finished updating in bitfields of Tx Desc, so write them in original
1032 * place.
1033 */
1034 vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1035 (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1036 gdesc = ctx.sop_txd;
1037 #endif
1038 dev_dbg(&adapter->netdev->dev,
1039 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1040 (u32)((union Vmxnet3_GenericDesc *)ctx.sop_txd -
1041 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1042 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1043
1044 spin_unlock_irqrestore(&tq->tx_lock, flags);
1045
1046 if (le32_to_cpu(tq->shared->txNumDeferred) >=
1047 le32_to_cpu(tq->shared->txThreshold)) {
1048 tq->shared->txNumDeferred = 0;
1049 VMXNET3_WRITE_BAR0_REG(adapter,
1050 VMXNET3_REG_TXPROD + tq->qid * 8,
1051 tq->tx_ring.next2fill);
1052 }
1053
1054 return NETDEV_TX_OK;
1055
1056 hdr_too_big:
1057 tq->stats.drop_oversized_hdr++;
1058 unlock_drop_pkt:
1059 spin_unlock_irqrestore(&tq->tx_lock, flags);
1060 drop_pkt:
1061 tq->stats.drop_total++;
1062 dev_kfree_skb(skb);
1063 return NETDEV_TX_OK;
1064 }
1065
1066
1067 static netdev_tx_t
1068 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1069 {
1070 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1071
1072 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1073 return vmxnet3_tq_xmit(skb,
1074 &adapter->tx_queue[skb->queue_mapping],
1075 adapter, netdev);
1076 }
1077
1078
1079 static void
1080 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1081 struct sk_buff *skb,
1082 union Vmxnet3_GenericDesc *gdesc)
1083 {
1084 if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1085 /* typical case: TCP/UDP over IP and both csums are correct */
1086 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1087 VMXNET3_RCD_CSUM_OK) {
1088 skb->ip_summed = CHECKSUM_UNNECESSARY;
1089 BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1090 BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6));
1091 BUG_ON(gdesc->rcd.frg);
1092 } else {
1093 if (gdesc->rcd.csum) {
1094 skb->csum = htons(gdesc->rcd.csum);
1095 skb->ip_summed = CHECKSUM_PARTIAL;
1096 } else {
1097 skb_checksum_none_assert(skb);
1098 }
1099 }
1100 } else {
1101 skb_checksum_none_assert(skb);
1102 }
1103 }
1104
1105
1106 static void
1107 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1108 struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter)
1109 {
1110 rq->stats.drop_err++;
1111 if (!rcd->fcs)
1112 rq->stats.drop_fcs++;
1113
1114 rq->stats.drop_total++;
1115
1116 /*
1117 * We do not unmap and chain the rx buffer to the skb.
1118 * We basically pretend this buffer is not used and will be recycled
1119 * by vmxnet3_rq_alloc_rx_buf()
1120 */
1121
1122 /*
1123 * ctx->skb may be NULL if this is the first and the only one
1124 * desc for the pkt
1125 */
1126 if (ctx->skb)
1127 dev_kfree_skb_irq(ctx->skb);
1128
1129 ctx->skb = NULL;
1130 }
1131
1132
1133 static int
1134 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1135 struct vmxnet3_adapter *adapter, int quota)
1136 {
1137 static const u32 rxprod_reg[2] = {
1138 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1139 };
1140 u32 num_rxd = 0;
1141 bool skip_page_frags = false;
1142 struct Vmxnet3_RxCompDesc *rcd;
1143 struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1144 #ifdef __BIG_ENDIAN_BITFIELD
1145 struct Vmxnet3_RxDesc rxCmdDesc;
1146 struct Vmxnet3_RxCompDesc rxComp;
1147 #endif
1148 vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1149 &rxComp);
1150 while (rcd->gen == rq->comp_ring.gen) {
1151 struct vmxnet3_rx_buf_info *rbi;
1152 struct sk_buff *skb, *new_skb = NULL;
1153 struct page *new_page = NULL;
1154 int num_to_alloc;
1155 struct Vmxnet3_RxDesc *rxd;
1156 u32 idx, ring_idx;
1157 struct vmxnet3_cmd_ring *ring = NULL;
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 ring = rq->rx_ring + ring_idx;
1169 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1170 &rxCmdDesc);
1171 rbi = rq->buf_info[ring_idx] + idx;
1172
1173 BUG_ON(rxd->addr != rbi->dma_addr ||
1174 rxd->len != rbi->len);
1175
1176 if (unlikely(rcd->eop && rcd->err)) {
1177 vmxnet3_rx_error(rq, rcd, ctx, adapter);
1178 goto rcd_done;
1179 }
1180
1181 if (rcd->sop) { /* first buf of the pkt */
1182 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1183 rcd->rqID != rq->qid);
1184
1185 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1186 BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1187
1188 if (unlikely(rcd->len == 0)) {
1189 /* Pretend the rx buffer is skipped. */
1190 BUG_ON(!(rcd->sop && rcd->eop));
1191 dev_dbg(&adapter->netdev->dev,
1192 "rxRing[%u][%u] 0 length\n",
1193 ring_idx, idx);
1194 goto rcd_done;
1195 }
1196
1197 skip_page_frags = false;
1198 ctx->skb = rbi->skb;
1199 new_skb = dev_alloc_skb(rbi->len + NET_IP_ALIGN);
1200 if (new_skb == NULL) {
1201 /* Skb allocation failed, do not handover this
1202 * skb to stack. Reuse it. Drop the existing pkt
1203 */
1204 rq->stats.rx_buf_alloc_failure++;
1205 ctx->skb = NULL;
1206 rq->stats.drop_total++;
1207 skip_page_frags = true;
1208 goto rcd_done;
1209 }
1210
1211 pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
1212 PCI_DMA_FROMDEVICE);
1213
1214 skb_put(ctx->skb, rcd->len);
1215
1216 /* Immediate refill */
1217 new_skb->dev = adapter->netdev;
1218 skb_reserve(new_skb, NET_IP_ALIGN);
1219 rbi->skb = new_skb;
1220 rbi->dma_addr = pci_map_single(adapter->pdev,
1221 rbi->skb->data, rbi->len,
1222 PCI_DMA_FROMDEVICE);
1223 rxd->addr = cpu_to_le64(rbi->dma_addr);
1224 rxd->len = rbi->len;
1225
1226 } else {
1227 BUG_ON(ctx->skb == NULL && !skip_page_frags);
1228
1229 /* non SOP buffer must be type 1 in most cases */
1230 BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1231 BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1232
1233 /* If an sop buffer was dropped, skip all
1234 * following non-sop fragments. They will be reused.
1235 */
1236 if (skip_page_frags)
1237 goto rcd_done;
1238
1239 new_page = alloc_page(GFP_ATOMIC);
1240 if (unlikely(new_page == NULL)) {
1241 /* Replacement page frag could not be allocated.
1242 * Reuse this page. Drop the pkt and free the
1243 * skb which contained this page as a frag. Skip
1244 * processing all the following non-sop frags.
1245 */
1246 rq->stats.rx_buf_alloc_failure++;
1247 dev_kfree_skb(ctx->skb);
1248 ctx->skb = NULL;
1249 skip_page_frags = true;
1250 goto rcd_done;
1251 }
1252
1253 if (rcd->len) {
1254 pci_unmap_page(adapter->pdev,
1255 rbi->dma_addr, rbi->len,
1256 PCI_DMA_FROMDEVICE);
1257
1258 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1259 }
1260
1261 /* Immediate refill */
1262 rbi->page = new_page;
1263 rbi->dma_addr = pci_map_page(adapter->pdev, rbi->page,
1264 0, PAGE_SIZE,
1265 PCI_DMA_FROMDEVICE);
1266 rxd->addr = cpu_to_le64(rbi->dma_addr);
1267 rxd->len = rbi->len;
1268 }
1269
1270
1271 skb = ctx->skb;
1272 if (rcd->eop) {
1273 skb->len += skb->data_len;
1274
1275 vmxnet3_rx_csum(adapter, skb,
1276 (union Vmxnet3_GenericDesc *)rcd);
1277 skb->protocol = eth_type_trans(skb, adapter->netdev);
1278
1279 if (unlikely(rcd->ts))
1280 __vlan_hwaccel_put_tag(skb, rcd->tci);
1281
1282 if (adapter->netdev->features & NETIF_F_LRO)
1283 netif_receive_skb(skb);
1284 else
1285 napi_gro_receive(&rq->napi, skb);
1286
1287 ctx->skb = NULL;
1288 }
1289
1290 rcd_done:
1291 /* device may have skipped some rx descs */
1292 ring->next2comp = idx;
1293 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1294 ring = rq->rx_ring + ring_idx;
1295 while (num_to_alloc) {
1296 vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1297 &rxCmdDesc);
1298 BUG_ON(!rxd->addr);
1299
1300 /* Recv desc is ready to be used by the device */
1301 rxd->gen = ring->gen;
1302 vmxnet3_cmd_ring_adv_next2fill(ring);
1303 num_to_alloc--;
1304 }
1305
1306 /* if needed, update the register */
1307 if (unlikely(rq->shared->updateRxProd)) {
1308 VMXNET3_WRITE_BAR0_REG(adapter,
1309 rxprod_reg[ring_idx] + rq->qid * 8,
1310 ring->next2fill);
1311 rq->uncommitted[ring_idx] = 0;
1312 }
1313
1314 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1315 vmxnet3_getRxComp(rcd,
1316 &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1317 }
1318
1319 return num_rxd;
1320 }
1321
1322
1323 static void
1324 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1325 struct vmxnet3_adapter *adapter)
1326 {
1327 u32 i, ring_idx;
1328 struct Vmxnet3_RxDesc *rxd;
1329
1330 for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1331 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1332 #ifdef __BIG_ENDIAN_BITFIELD
1333 struct Vmxnet3_RxDesc rxDesc;
1334 #endif
1335 vmxnet3_getRxDesc(rxd,
1336 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1337
1338 if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1339 rq->buf_info[ring_idx][i].skb) {
1340 pci_unmap_single(adapter->pdev, rxd->addr,
1341 rxd->len, PCI_DMA_FROMDEVICE);
1342 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1343 rq->buf_info[ring_idx][i].skb = NULL;
1344 } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1345 rq->buf_info[ring_idx][i].page) {
1346 pci_unmap_page(adapter->pdev, rxd->addr,
1347 rxd->len, PCI_DMA_FROMDEVICE);
1348 put_page(rq->buf_info[ring_idx][i].page);
1349 rq->buf_info[ring_idx][i].page = NULL;
1350 }
1351 }
1352
1353 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1354 rq->rx_ring[ring_idx].next2fill =
1355 rq->rx_ring[ring_idx].next2comp = 0;
1356 rq->uncommitted[ring_idx] = 0;
1357 }
1358
1359 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1360 rq->comp_ring.next2proc = 0;
1361 }
1362
1363
1364 static void
1365 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1366 {
1367 int i;
1368
1369 for (i = 0; i < adapter->num_rx_queues; i++)
1370 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1371 }
1372
1373
1374 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1375 struct vmxnet3_adapter *adapter)
1376 {
1377 int i;
1378 int j;
1379
1380 /* all rx buffers must have already been freed */
1381 for (i = 0; i < 2; i++) {
1382 if (rq->buf_info[i]) {
1383 for (j = 0; j < rq->rx_ring[i].size; j++)
1384 BUG_ON(rq->buf_info[i][j].page != NULL);
1385 }
1386 }
1387
1388
1389 kfree(rq->buf_info[0]);
1390
1391 for (i = 0; i < 2; i++) {
1392 if (rq->rx_ring[i].base) {
1393 pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
1394 * sizeof(struct Vmxnet3_RxDesc),
1395 rq->rx_ring[i].base,
1396 rq->rx_ring[i].basePA);
1397 rq->rx_ring[i].base = NULL;
1398 }
1399 rq->buf_info[i] = NULL;
1400 }
1401
1402 if (rq->comp_ring.base) {
1403 pci_free_consistent(adapter->pdev, rq->comp_ring.size *
1404 sizeof(struct Vmxnet3_RxCompDesc),
1405 rq->comp_ring.base, rq->comp_ring.basePA);
1406 rq->comp_ring.base = NULL;
1407 }
1408 }
1409
1410
1411 static int
1412 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1413 struct vmxnet3_adapter *adapter)
1414 {
1415 int i;
1416
1417 /* initialize buf_info */
1418 for (i = 0; i < rq->rx_ring[0].size; i++) {
1419
1420 /* 1st buf for a pkt is skbuff */
1421 if (i % adapter->rx_buf_per_pkt == 0) {
1422 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1423 rq->buf_info[0][i].len = adapter->skb_buf_size;
1424 } else { /* subsequent bufs for a pkt is frag */
1425 rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1426 rq->buf_info[0][i].len = PAGE_SIZE;
1427 }
1428 }
1429 for (i = 0; i < rq->rx_ring[1].size; i++) {
1430 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1431 rq->buf_info[1][i].len = PAGE_SIZE;
1432 }
1433
1434 /* reset internal state and allocate buffers for both rings */
1435 for (i = 0; i < 2; i++) {
1436 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1437 rq->uncommitted[i] = 0;
1438
1439 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1440 sizeof(struct Vmxnet3_RxDesc));
1441 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1442 }
1443 if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1444 adapter) == 0) {
1445 /* at least has 1 rx buffer for the 1st ring */
1446 return -ENOMEM;
1447 }
1448 vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1449
1450 /* reset the comp ring */
1451 rq->comp_ring.next2proc = 0;
1452 memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1453 sizeof(struct Vmxnet3_RxCompDesc));
1454 rq->comp_ring.gen = VMXNET3_INIT_GEN;
1455
1456 /* reset rxctx */
1457 rq->rx_ctx.skb = NULL;
1458
1459 /* stats are not reset */
1460 return 0;
1461 }
1462
1463
1464 static int
1465 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1466 {
1467 int i, err = 0;
1468
1469 for (i = 0; i < adapter->num_rx_queues; i++) {
1470 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1471 if (unlikely(err)) {
1472 dev_err(&adapter->netdev->dev, "%s: failed to "
1473 "initialize rx queue%i\n",
1474 adapter->netdev->name, i);
1475 break;
1476 }
1477 }
1478 return err;
1479
1480 }
1481
1482
1483 static int
1484 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1485 {
1486 int i;
1487 size_t sz;
1488 struct vmxnet3_rx_buf_info *bi;
1489
1490 for (i = 0; i < 2; i++) {
1491
1492 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1493 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
1494 &rq->rx_ring[i].basePA);
1495 if (!rq->rx_ring[i].base) {
1496 printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
1497 adapter->netdev->name, i);
1498 goto err;
1499 }
1500 }
1501
1502 sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1503 rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
1504 &rq->comp_ring.basePA);
1505 if (!rq->comp_ring.base) {
1506 printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
1507 adapter->netdev->name);
1508 goto err;
1509 }
1510
1511 sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1512 rq->rx_ring[1].size);
1513 bi = kzalloc(sz, GFP_KERNEL);
1514 if (!bi)
1515 goto err;
1516
1517 rq->buf_info[0] = bi;
1518 rq->buf_info[1] = bi + rq->rx_ring[0].size;
1519
1520 return 0;
1521
1522 err:
1523 vmxnet3_rq_destroy(rq, adapter);
1524 return -ENOMEM;
1525 }
1526
1527
1528 static int
1529 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1530 {
1531 int i, err = 0;
1532
1533 for (i = 0; i < adapter->num_rx_queues; i++) {
1534 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1535 if (unlikely(err)) {
1536 dev_err(&adapter->netdev->dev,
1537 "%s: failed to create rx queue%i\n",
1538 adapter->netdev->name, i);
1539 goto err_out;
1540 }
1541 }
1542 return err;
1543 err_out:
1544 vmxnet3_rq_destroy_all(adapter);
1545 return err;
1546
1547 }
1548
1549 /* Multiple queue aware polling function for tx and rx */
1550
1551 static int
1552 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1553 {
1554 int rcd_done = 0, i;
1555 if (unlikely(adapter->shared->ecr))
1556 vmxnet3_process_events(adapter);
1557 for (i = 0; i < adapter->num_tx_queues; i++)
1558 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1559
1560 for (i = 0; i < adapter->num_rx_queues; i++)
1561 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1562 adapter, budget);
1563 return rcd_done;
1564 }
1565
1566
1567 static int
1568 vmxnet3_poll(struct napi_struct *napi, int budget)
1569 {
1570 struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1571 struct vmxnet3_rx_queue, napi);
1572 int rxd_done;
1573
1574 rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1575
1576 if (rxd_done < budget) {
1577 napi_complete(napi);
1578 vmxnet3_enable_all_intrs(rx_queue->adapter);
1579 }
1580 return rxd_done;
1581 }
1582
1583 /*
1584 * NAPI polling function for MSI-X mode with multiple Rx queues
1585 * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1586 */
1587
1588 static int
1589 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1590 {
1591 struct vmxnet3_rx_queue *rq = container_of(napi,
1592 struct vmxnet3_rx_queue, napi);
1593 struct vmxnet3_adapter *adapter = rq->adapter;
1594 int rxd_done;
1595
1596 /* When sharing interrupt with corresponding tx queue, process
1597 * tx completions in that queue as well
1598 */
1599 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1600 struct vmxnet3_tx_queue *tq =
1601 &adapter->tx_queue[rq - adapter->rx_queue];
1602 vmxnet3_tq_tx_complete(tq, adapter);
1603 }
1604
1605 rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1606
1607 if (rxd_done < budget) {
1608 napi_complete(napi);
1609 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1610 }
1611 return rxd_done;
1612 }
1613
1614
1615 #ifdef CONFIG_PCI_MSI
1616
1617 /*
1618 * Handle completion interrupts on tx queues
1619 * Returns whether or not the intr is handled
1620 */
1621
1622 static irqreturn_t
1623 vmxnet3_msix_tx(int irq, void *data)
1624 {
1625 struct vmxnet3_tx_queue *tq = data;
1626 struct vmxnet3_adapter *adapter = tq->adapter;
1627
1628 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1629 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1630
1631 /* Handle the case where only one irq is allocate for all tx queues */
1632 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1633 int i;
1634 for (i = 0; i < adapter->num_tx_queues; i++) {
1635 struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1636 vmxnet3_tq_tx_complete(txq, adapter);
1637 }
1638 } else {
1639 vmxnet3_tq_tx_complete(tq, adapter);
1640 }
1641 vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1642
1643 return IRQ_HANDLED;
1644 }
1645
1646
1647 /*
1648 * Handle completion interrupts on rx queues. Returns whether or not the
1649 * intr is handled
1650 */
1651
1652 static irqreturn_t
1653 vmxnet3_msix_rx(int irq, void *data)
1654 {
1655 struct vmxnet3_rx_queue *rq = data;
1656 struct vmxnet3_adapter *adapter = rq->adapter;
1657
1658 /* disable intr if needed */
1659 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1660 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1661 napi_schedule(&rq->napi);
1662
1663 return IRQ_HANDLED;
1664 }
1665
1666 /*
1667 *----------------------------------------------------------------------------
1668 *
1669 * vmxnet3_msix_event --
1670 *
1671 * vmxnet3 msix event intr handler
1672 *
1673 * Result:
1674 * whether or not the intr is handled
1675 *
1676 *----------------------------------------------------------------------------
1677 */
1678
1679 static irqreturn_t
1680 vmxnet3_msix_event(int irq, void *data)
1681 {
1682 struct net_device *dev = data;
1683 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1684
1685 /* disable intr if needed */
1686 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1687 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1688
1689 if (adapter->shared->ecr)
1690 vmxnet3_process_events(adapter);
1691
1692 vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1693
1694 return IRQ_HANDLED;
1695 }
1696
1697 #endif /* CONFIG_PCI_MSI */
1698
1699
1700 /* Interrupt handler for vmxnet3 */
1701 static irqreturn_t
1702 vmxnet3_intr(int irq, void *dev_id)
1703 {
1704 struct net_device *dev = dev_id;
1705 struct vmxnet3_adapter *adapter = netdev_priv(dev);
1706
1707 if (adapter->intr.type == VMXNET3_IT_INTX) {
1708 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1709 if (unlikely(icr == 0))
1710 /* not ours */
1711 return IRQ_NONE;
1712 }
1713
1714
1715 /* disable intr if needed */
1716 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1717 vmxnet3_disable_all_intrs(adapter);
1718
1719 napi_schedule(&adapter->rx_queue[0].napi);
1720
1721 return IRQ_HANDLED;
1722 }
1723
1724 #ifdef CONFIG_NET_POLL_CONTROLLER
1725
1726 /* netpoll callback. */
1727 static void
1728 vmxnet3_netpoll(struct net_device *netdev)
1729 {
1730 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1731
1732 if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1733 vmxnet3_disable_all_intrs(adapter);
1734
1735 vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
1736 vmxnet3_enable_all_intrs(adapter);
1737
1738 }
1739 #endif /* CONFIG_NET_POLL_CONTROLLER */
1740
1741 static int
1742 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1743 {
1744 struct vmxnet3_intr *intr = &adapter->intr;
1745 int err = 0, i;
1746 int vector = 0;
1747
1748 #ifdef CONFIG_PCI_MSI
1749 if (adapter->intr.type == VMXNET3_IT_MSIX) {
1750 for (i = 0; i < adapter->num_tx_queues; i++) {
1751 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1752 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1753 adapter->netdev->name, vector);
1754 err = request_irq(
1755 intr->msix_entries[vector].vector,
1756 vmxnet3_msix_tx, 0,
1757 adapter->tx_queue[i].name,
1758 &adapter->tx_queue[i]);
1759 } else {
1760 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1761 adapter->netdev->name, vector);
1762 }
1763 if (err) {
1764 dev_err(&adapter->netdev->dev,
1765 "Failed to request irq for MSIX, %s, "
1766 "error %d\n",
1767 adapter->tx_queue[i].name, err);
1768 return err;
1769 }
1770
1771 /* Handle the case where only 1 MSIx was allocated for
1772 * all tx queues */
1773 if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1774 for (; i < adapter->num_tx_queues; i++)
1775 adapter->tx_queue[i].comp_ring.intr_idx
1776 = vector;
1777 vector++;
1778 break;
1779 } else {
1780 adapter->tx_queue[i].comp_ring.intr_idx
1781 = vector++;
1782 }
1783 }
1784 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1785 vector = 0;
1786
1787 for (i = 0; i < adapter->num_rx_queues; i++) {
1788 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1789 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1790 adapter->netdev->name, vector);
1791 else
1792 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1793 adapter->netdev->name, vector);
1794 err = request_irq(intr->msix_entries[vector].vector,
1795 vmxnet3_msix_rx, 0,
1796 adapter->rx_queue[i].name,
1797 &(adapter->rx_queue[i]));
1798 if (err) {
1799 printk(KERN_ERR "Failed to request irq for MSIX"
1800 ", %s, error %d\n",
1801 adapter->rx_queue[i].name, err);
1802 return err;
1803 }
1804
1805 adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1806 }
1807
1808 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1809 adapter->netdev->name, vector);
1810 err = request_irq(intr->msix_entries[vector].vector,
1811 vmxnet3_msix_event, 0,
1812 intr->event_msi_vector_name, adapter->netdev);
1813 intr->event_intr_idx = vector;
1814
1815 } else if (intr->type == VMXNET3_IT_MSI) {
1816 adapter->num_rx_queues = 1;
1817 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1818 adapter->netdev->name, adapter->netdev);
1819 } else {
1820 #endif
1821 adapter->num_rx_queues = 1;
1822 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1823 IRQF_SHARED, adapter->netdev->name,
1824 adapter->netdev);
1825 #ifdef CONFIG_PCI_MSI
1826 }
1827 #endif
1828 intr->num_intrs = vector + 1;
1829 if (err) {
1830 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
1831 ":%d\n", adapter->netdev->name, intr->type, err);
1832 } else {
1833 /* Number of rx queues will not change after this */
1834 for (i = 0; i < adapter->num_rx_queues; i++) {
1835 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1836 rq->qid = i;
1837 rq->qid2 = i + adapter->num_rx_queues;
1838 }
1839
1840
1841
1842 /* init our intr settings */
1843 for (i = 0; i < intr->num_intrs; i++)
1844 intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1845 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1846 adapter->intr.event_intr_idx = 0;
1847 for (i = 0; i < adapter->num_tx_queues; i++)
1848 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1849 adapter->rx_queue[0].comp_ring.intr_idx = 0;
1850 }
1851
1852 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
1853 "allocated\n", adapter->netdev->name, intr->type,
1854 intr->mask_mode, intr->num_intrs);
1855 }
1856
1857 return err;
1858 }
1859
1860
1861 static void
1862 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1863 {
1864 struct vmxnet3_intr *intr = &adapter->intr;
1865 BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1866
1867 switch (intr->type) {
1868 #ifdef CONFIG_PCI_MSI
1869 case VMXNET3_IT_MSIX:
1870 {
1871 int i, vector = 0;
1872
1873 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1874 for (i = 0; i < adapter->num_tx_queues; i++) {
1875 free_irq(intr->msix_entries[vector++].vector,
1876 &(adapter->tx_queue[i]));
1877 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1878 break;
1879 }
1880 }
1881
1882 for (i = 0; i < adapter->num_rx_queues; i++) {
1883 free_irq(intr->msix_entries[vector++].vector,
1884 &(adapter->rx_queue[i]));
1885 }
1886
1887 free_irq(intr->msix_entries[vector].vector,
1888 adapter->netdev);
1889 BUG_ON(vector >= intr->num_intrs);
1890 break;
1891 }
1892 #endif
1893 case VMXNET3_IT_MSI:
1894 free_irq(adapter->pdev->irq, adapter->netdev);
1895 break;
1896 case VMXNET3_IT_INTX:
1897 free_irq(adapter->pdev->irq, adapter->netdev);
1898 break;
1899 default:
1900 BUG_ON(true);
1901 }
1902 }
1903
1904
1905 static void
1906 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1907 {
1908 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1909 u16 vid;
1910
1911 /* allow untagged pkts */
1912 VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1913
1914 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1915 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1916 }
1917
1918
1919 static int
1920 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1921 {
1922 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1923
1924 if (!(netdev->flags & IFF_PROMISC)) {
1925 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1926 unsigned long flags;
1927
1928 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1929 spin_lock_irqsave(&adapter->cmd_lock, flags);
1930 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1931 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1932 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1933 }
1934
1935 set_bit(vid, adapter->active_vlans);
1936
1937 return 0;
1938 }
1939
1940
1941 static int
1942 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1943 {
1944 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1945
1946 if (!(netdev->flags & IFF_PROMISC)) {
1947 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1948 unsigned long flags;
1949
1950 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
1951 spin_lock_irqsave(&adapter->cmd_lock, flags);
1952 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1953 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1954 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1955 }
1956
1957 clear_bit(vid, adapter->active_vlans);
1958
1959 return 0;
1960 }
1961
1962
1963 static u8 *
1964 vmxnet3_copy_mc(struct net_device *netdev)
1965 {
1966 u8 *buf = NULL;
1967 u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
1968
1969 /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
1970 if (sz <= 0xffff) {
1971 /* We may be called with BH disabled */
1972 buf = kmalloc(sz, GFP_ATOMIC);
1973 if (buf) {
1974 struct netdev_hw_addr *ha;
1975 int i = 0;
1976
1977 netdev_for_each_mc_addr(ha, netdev)
1978 memcpy(buf + i++ * ETH_ALEN, ha->addr,
1979 ETH_ALEN);
1980 }
1981 }
1982 return buf;
1983 }
1984
1985
1986 static void
1987 vmxnet3_set_mc(struct net_device *netdev)
1988 {
1989 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1990 unsigned long flags;
1991 struct Vmxnet3_RxFilterConf *rxConf =
1992 &adapter->shared->devRead.rxFilterConf;
1993 u8 *new_table = NULL;
1994 u32 new_mode = VMXNET3_RXM_UCAST;
1995
1996 if (netdev->flags & IFF_PROMISC) {
1997 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1998 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
1999
2000 new_mode |= VMXNET3_RXM_PROMISC;
2001 } else {
2002 vmxnet3_restore_vlan(adapter);
2003 }
2004
2005 if (netdev->flags & IFF_BROADCAST)
2006 new_mode |= VMXNET3_RXM_BCAST;
2007
2008 if (netdev->flags & IFF_ALLMULTI)
2009 new_mode |= VMXNET3_RXM_ALL_MULTI;
2010 else
2011 if (!netdev_mc_empty(netdev)) {
2012 new_table = vmxnet3_copy_mc(netdev);
2013 if (new_table) {
2014 new_mode |= VMXNET3_RXM_MCAST;
2015 rxConf->mfTableLen = cpu_to_le16(
2016 netdev_mc_count(netdev) * ETH_ALEN);
2017 rxConf->mfTablePA = cpu_to_le64(virt_to_phys(
2018 new_table));
2019 } else {
2020 printk(KERN_INFO "%s: failed to copy mcast list"
2021 ", setting ALL_MULTI\n", netdev->name);
2022 new_mode |= VMXNET3_RXM_ALL_MULTI;
2023 }
2024 }
2025
2026
2027 if (!(new_mode & VMXNET3_RXM_MCAST)) {
2028 rxConf->mfTableLen = 0;
2029 rxConf->mfTablePA = 0;
2030 }
2031
2032 spin_lock_irqsave(&adapter->cmd_lock, flags);
2033 if (new_mode != rxConf->rxMode) {
2034 rxConf->rxMode = cpu_to_le32(new_mode);
2035 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2036 VMXNET3_CMD_UPDATE_RX_MODE);
2037 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2038 VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2039 }
2040
2041 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2042 VMXNET3_CMD_UPDATE_MAC_FILTERS);
2043 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2044
2045 kfree(new_table);
2046 }
2047
2048 void
2049 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2050 {
2051 int i;
2052
2053 for (i = 0; i < adapter->num_rx_queues; i++)
2054 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2055 }
2056
2057
2058 /*
2059 * Set up driver_shared based on settings in adapter.
2060 */
2061
2062 static void
2063 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2064 {
2065 struct Vmxnet3_DriverShared *shared = adapter->shared;
2066 struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2067 struct Vmxnet3_TxQueueConf *tqc;
2068 struct Vmxnet3_RxQueueConf *rqc;
2069 int i;
2070
2071 memset(shared, 0, sizeof(*shared));
2072
2073 /* driver settings */
2074 shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2075 devRead->misc.driverInfo.version = cpu_to_le32(
2076 VMXNET3_DRIVER_VERSION_NUM);
2077 devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2078 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2079 devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2080 *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2081 *((u32 *)&devRead->misc.driverInfo.gos));
2082 devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2083 devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2084
2085 devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter));
2086 devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2087
2088 /* set up feature flags */
2089 if (adapter->netdev->features & NETIF_F_RXCSUM)
2090 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2091
2092 if (adapter->netdev->features & NETIF_F_LRO) {
2093 devRead->misc.uptFeatures |= UPT1_F_LRO;
2094 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2095 }
2096 if (adapter->netdev->features & NETIF_F_HW_VLAN_RX)
2097 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2098
2099 devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2100 devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2101 devRead->misc.queueDescLen = cpu_to_le32(
2102 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2103 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2104
2105 /* tx queue settings */
2106 devRead->misc.numTxQueues = adapter->num_tx_queues;
2107 for (i = 0; i < adapter->num_tx_queues; i++) {
2108 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2109 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2110 tqc = &adapter->tqd_start[i].conf;
2111 tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA);
2112 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2113 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2114 tqc->ddPA = cpu_to_le64(virt_to_phys(tq->buf_info));
2115 tqc->txRingSize = cpu_to_le32(tq->tx_ring.size);
2116 tqc->dataRingSize = cpu_to_le32(tq->data_ring.size);
2117 tqc->compRingSize = cpu_to_le32(tq->comp_ring.size);
2118 tqc->ddLen = cpu_to_le32(
2119 sizeof(struct vmxnet3_tx_buf_info) *
2120 tqc->txRingSize);
2121 tqc->intrIdx = tq->comp_ring.intr_idx;
2122 }
2123
2124 /* rx queue settings */
2125 devRead->misc.numRxQueues = adapter->num_rx_queues;
2126 for (i = 0; i < adapter->num_rx_queues; i++) {
2127 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2128 rqc = &adapter->rqd_start[i].conf;
2129 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2130 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2131 rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA);
2132 rqc->ddPA = cpu_to_le64(virt_to_phys(
2133 rq->buf_info));
2134 rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size);
2135 rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size);
2136 rqc->compRingSize = cpu_to_le32(rq->comp_ring.size);
2137 rqc->ddLen = cpu_to_le32(
2138 sizeof(struct vmxnet3_rx_buf_info) *
2139 (rqc->rxRingSize[0] +
2140 rqc->rxRingSize[1]));
2141 rqc->intrIdx = rq->comp_ring.intr_idx;
2142 }
2143
2144 #ifdef VMXNET3_RSS
2145 memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2146
2147 if (adapter->rss) {
2148 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2149 devRead->misc.uptFeatures |= UPT1_F_RSS;
2150 devRead->misc.numRxQueues = adapter->num_rx_queues;
2151 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2152 UPT1_RSS_HASH_TYPE_IPV4 |
2153 UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2154 UPT1_RSS_HASH_TYPE_IPV6;
2155 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2156 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2157 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2158 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
2159 for (i = 0; i < rssConf->indTableSize; i++)
2160 rssConf->indTable[i] = ethtool_rxfh_indir_default(
2161 i, adapter->num_rx_queues);
2162
2163 devRead->rssConfDesc.confVer = 1;
2164 devRead->rssConfDesc.confLen = sizeof(*rssConf);
2165 devRead->rssConfDesc.confPA = virt_to_phys(rssConf);
2166 }
2167
2168 #endif /* VMXNET3_RSS */
2169
2170 /* intr settings */
2171 devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2172 VMXNET3_IMM_AUTO;
2173 devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2174 for (i = 0; i < adapter->intr.num_intrs; i++)
2175 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2176
2177 devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2178 devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2179
2180 /* rx filter settings */
2181 devRead->rxFilterConf.rxMode = 0;
2182 vmxnet3_restore_vlan(adapter);
2183 vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2184
2185 /* the rest are already zeroed */
2186 }
2187
2188
2189 int
2190 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2191 {
2192 int err, i;
2193 u32 ret;
2194 unsigned long flags;
2195
2196 dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2197 " ring sizes %u %u %u\n", adapter->netdev->name,
2198 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2199 adapter->tx_queue[0].tx_ring.size,
2200 adapter->rx_queue[0].rx_ring[0].size,
2201 adapter->rx_queue[0].rx_ring[1].size);
2202
2203 vmxnet3_tq_init_all(adapter);
2204 err = vmxnet3_rq_init_all(adapter);
2205 if (err) {
2206 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
2207 adapter->netdev->name, err);
2208 goto rq_err;
2209 }
2210
2211 err = vmxnet3_request_irqs(adapter);
2212 if (err) {
2213 printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
2214 adapter->netdev->name, err);
2215 goto irq_err;
2216 }
2217
2218 vmxnet3_setup_driver_shared(adapter);
2219
2220 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2221 adapter->shared_pa));
2222 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2223 adapter->shared_pa));
2224 spin_lock_irqsave(&adapter->cmd_lock, flags);
2225 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2226 VMXNET3_CMD_ACTIVATE_DEV);
2227 ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2228 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2229
2230 if (ret != 0) {
2231 printk(KERN_ERR "Failed to activate dev %s: error %u\n",
2232 adapter->netdev->name, ret);
2233 err = -EINVAL;
2234 goto activate_err;
2235 }
2236
2237 for (i = 0; i < adapter->num_rx_queues; i++) {
2238 VMXNET3_WRITE_BAR0_REG(adapter,
2239 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2240 adapter->rx_queue[i].rx_ring[0].next2fill);
2241 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2242 (i * VMXNET3_REG_ALIGN)),
2243 adapter->rx_queue[i].rx_ring[1].next2fill);
2244 }
2245
2246 /* Apply the rx filter settins last. */
2247 vmxnet3_set_mc(adapter->netdev);
2248
2249 /*
2250 * Check link state when first activating device. It will start the
2251 * tx queue if the link is up.
2252 */
2253 vmxnet3_check_link(adapter, true);
2254 for (i = 0; i < adapter->num_rx_queues; i++)
2255 napi_enable(&adapter->rx_queue[i].napi);
2256 vmxnet3_enable_all_intrs(adapter);
2257 clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2258 return 0;
2259
2260 activate_err:
2261 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2262 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2263 vmxnet3_free_irqs(adapter);
2264 irq_err:
2265 rq_err:
2266 /* free up buffers we allocated */
2267 vmxnet3_rq_cleanup_all(adapter);
2268 return err;
2269 }
2270
2271
2272 void
2273 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2274 {
2275 unsigned long flags;
2276 spin_lock_irqsave(&adapter->cmd_lock, flags);
2277 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2278 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2279 }
2280
2281
2282 int
2283 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2284 {
2285 int i;
2286 unsigned long flags;
2287 if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2288 return 0;
2289
2290
2291 spin_lock_irqsave(&adapter->cmd_lock, flags);
2292 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2293 VMXNET3_CMD_QUIESCE_DEV);
2294 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2295 vmxnet3_disable_all_intrs(adapter);
2296
2297 for (i = 0; i < adapter->num_rx_queues; i++)
2298 napi_disable(&adapter->rx_queue[i].napi);
2299 netif_tx_disable(adapter->netdev);
2300 adapter->link_speed = 0;
2301 netif_carrier_off(adapter->netdev);
2302
2303 vmxnet3_tq_cleanup_all(adapter);
2304 vmxnet3_rq_cleanup_all(adapter);
2305 vmxnet3_free_irqs(adapter);
2306 return 0;
2307 }
2308
2309
2310 static void
2311 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2312 {
2313 u32 tmp;
2314
2315 tmp = *(u32 *)mac;
2316 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2317
2318 tmp = (mac[5] << 8) | mac[4];
2319 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2320 }
2321
2322
2323 static int
2324 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2325 {
2326 struct sockaddr *addr = p;
2327 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2328
2329 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2330 vmxnet3_write_mac_addr(adapter, addr->sa_data);
2331
2332 return 0;
2333 }
2334
2335
2336 /* ==================== initialization and cleanup routines ============ */
2337
2338 static int
2339 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2340 {
2341 int err;
2342 unsigned long mmio_start, mmio_len;
2343 struct pci_dev *pdev = adapter->pdev;
2344
2345 err = pci_enable_device(pdev);
2346 if (err) {
2347 printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
2348 pci_name(pdev), err);
2349 return err;
2350 }
2351
2352 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2353 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2354 printk(KERN_ERR "pci_set_consistent_dma_mask failed "
2355 "for adapter %s\n", pci_name(pdev));
2356 err = -EIO;
2357 goto err_set_mask;
2358 }
2359 *dma64 = true;
2360 } else {
2361 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2362 printk(KERN_ERR "pci_set_dma_mask failed for adapter "
2363 "%s\n", pci_name(pdev));
2364 err = -EIO;
2365 goto err_set_mask;
2366 }
2367 *dma64 = false;
2368 }
2369
2370 err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2371 vmxnet3_driver_name);
2372 if (err) {
2373 printk(KERN_ERR "Failed to request region for adapter %s: "
2374 "error %d\n", pci_name(pdev), err);
2375 goto err_set_mask;
2376 }
2377
2378 pci_set_master(pdev);
2379
2380 mmio_start = pci_resource_start(pdev, 0);
2381 mmio_len = pci_resource_len(pdev, 0);
2382 adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2383 if (!adapter->hw_addr0) {
2384 printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
2385 pci_name(pdev));
2386 err = -EIO;
2387 goto err_ioremap;
2388 }
2389
2390 mmio_start = pci_resource_start(pdev, 1);
2391 mmio_len = pci_resource_len(pdev, 1);
2392 adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2393 if (!adapter->hw_addr1) {
2394 printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
2395 pci_name(pdev));
2396 err = -EIO;
2397 goto err_bar1;
2398 }
2399 return 0;
2400
2401 err_bar1:
2402 iounmap(adapter->hw_addr0);
2403 err_ioremap:
2404 pci_release_selected_regions(pdev, (1 << 2) - 1);
2405 err_set_mask:
2406 pci_disable_device(pdev);
2407 return err;
2408 }
2409
2410
2411 static void
2412 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2413 {
2414 BUG_ON(!adapter->pdev);
2415
2416 iounmap(adapter->hw_addr0);
2417 iounmap(adapter->hw_addr1);
2418 pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2419 pci_disable_device(adapter->pdev);
2420 }
2421
2422
2423 static void
2424 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2425 {
2426 size_t sz, i, ring0_size, ring1_size, comp_size;
2427 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2428
2429
2430 if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2431 VMXNET3_MAX_ETH_HDR_SIZE) {
2432 adapter->skb_buf_size = adapter->netdev->mtu +
2433 VMXNET3_MAX_ETH_HDR_SIZE;
2434 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2435 adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2436
2437 adapter->rx_buf_per_pkt = 1;
2438 } else {
2439 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2440 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2441 VMXNET3_MAX_ETH_HDR_SIZE;
2442 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2443 }
2444
2445 /*
2446 * for simplicity, force the ring0 size to be a multiple of
2447 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2448 */
2449 sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2450 ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2451 ring0_size = (ring0_size + sz - 1) / sz * sz;
2452 ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2453 sz * sz);
2454 ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2455 comp_size = ring0_size + ring1_size;
2456
2457 for (i = 0; i < adapter->num_rx_queues; i++) {
2458 rq = &adapter->rx_queue[i];
2459 rq->rx_ring[0].size = ring0_size;
2460 rq->rx_ring[1].size = ring1_size;
2461 rq->comp_ring.size = comp_size;
2462 }
2463 }
2464
2465
2466 int
2467 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2468 u32 rx_ring_size, u32 rx_ring2_size)
2469 {
2470 int err = 0, i;
2471
2472 for (i = 0; i < adapter->num_tx_queues; i++) {
2473 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2474 tq->tx_ring.size = tx_ring_size;
2475 tq->data_ring.size = tx_ring_size;
2476 tq->comp_ring.size = tx_ring_size;
2477 tq->shared = &adapter->tqd_start[i].ctrl;
2478 tq->stopped = true;
2479 tq->adapter = adapter;
2480 tq->qid = i;
2481 err = vmxnet3_tq_create(tq, adapter);
2482 /*
2483 * Too late to change num_tx_queues. We cannot do away with
2484 * lesser number of queues than what we asked for
2485 */
2486 if (err)
2487 goto queue_err;
2488 }
2489
2490 adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2491 adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2492 vmxnet3_adjust_rx_ring_size(adapter);
2493 for (i = 0; i < adapter->num_rx_queues; i++) {
2494 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2495 /* qid and qid2 for rx queues will be assigned later when num
2496 * of rx queues is finalized after allocating intrs */
2497 rq->shared = &adapter->rqd_start[i].ctrl;
2498 rq->adapter = adapter;
2499 err = vmxnet3_rq_create(rq, adapter);
2500 if (err) {
2501 if (i == 0) {
2502 printk(KERN_ERR "Could not allocate any rx"
2503 "queues. Aborting.\n");
2504 goto queue_err;
2505 } else {
2506 printk(KERN_INFO "Number of rx queues changed "
2507 "to : %d.\n", i);
2508 adapter->num_rx_queues = i;
2509 err = 0;
2510 break;
2511 }
2512 }
2513 }
2514 return err;
2515 queue_err:
2516 vmxnet3_tq_destroy_all(adapter);
2517 return err;
2518 }
2519
2520 static int
2521 vmxnet3_open(struct net_device *netdev)
2522 {
2523 struct vmxnet3_adapter *adapter;
2524 int err, i;
2525
2526 adapter = netdev_priv(netdev);
2527
2528 for (i = 0; i < adapter->num_tx_queues; i++)
2529 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2530
2531 err = vmxnet3_create_queues(adapter, VMXNET3_DEF_TX_RING_SIZE,
2532 VMXNET3_DEF_RX_RING_SIZE,
2533 VMXNET3_DEF_RX_RING_SIZE);
2534 if (err)
2535 goto queue_err;
2536
2537 err = vmxnet3_activate_dev(adapter);
2538 if (err)
2539 goto activate_err;
2540
2541 return 0;
2542
2543 activate_err:
2544 vmxnet3_rq_destroy_all(adapter);
2545 vmxnet3_tq_destroy_all(adapter);
2546 queue_err:
2547 return err;
2548 }
2549
2550
2551 static int
2552 vmxnet3_close(struct net_device *netdev)
2553 {
2554 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2555
2556 /*
2557 * Reset_work may be in the middle of resetting the device, wait for its
2558 * completion.
2559 */
2560 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2561 msleep(1);
2562
2563 vmxnet3_quiesce_dev(adapter);
2564
2565 vmxnet3_rq_destroy_all(adapter);
2566 vmxnet3_tq_destroy_all(adapter);
2567
2568 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2569
2570
2571 return 0;
2572 }
2573
2574
2575 void
2576 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2577 {
2578 int i;
2579
2580 /*
2581 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2582 * vmxnet3_close() will deadlock.
2583 */
2584 BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2585
2586 /* we need to enable NAPI, otherwise dev_close will deadlock */
2587 for (i = 0; i < adapter->num_rx_queues; i++)
2588 napi_enable(&adapter->rx_queue[i].napi);
2589 dev_close(adapter->netdev);
2590 }
2591
2592
2593 static int
2594 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2595 {
2596 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2597 int err = 0;
2598
2599 if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2600 return -EINVAL;
2601
2602 netdev->mtu = new_mtu;
2603
2604 /*
2605 * Reset_work may be in the middle of resetting the device, wait for its
2606 * completion.
2607 */
2608 while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2609 msleep(1);
2610
2611 if (netif_running(netdev)) {
2612 vmxnet3_quiesce_dev(adapter);
2613 vmxnet3_reset_dev(adapter);
2614
2615 /* we need to re-create the rx queue based on the new mtu */
2616 vmxnet3_rq_destroy_all(adapter);
2617 vmxnet3_adjust_rx_ring_size(adapter);
2618 err = vmxnet3_rq_create_all(adapter);
2619 if (err) {
2620 printk(KERN_ERR "%s: failed to re-create rx queues,"
2621 " error %d. Closing it.\n", netdev->name, err);
2622 goto out;
2623 }
2624
2625 err = vmxnet3_activate_dev(adapter);
2626 if (err) {
2627 printk(KERN_ERR "%s: failed to re-activate, error %d. "
2628 "Closing it\n", netdev->name, err);
2629 goto out;
2630 }
2631 }
2632
2633 out:
2634 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2635 if (err)
2636 vmxnet3_force_close(adapter);
2637
2638 return err;
2639 }
2640
2641
2642 static void
2643 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
2644 {
2645 struct net_device *netdev = adapter->netdev;
2646
2647 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
2648 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX |
2649 NETIF_F_HW_VLAN_RX | NETIF_F_TSO | NETIF_F_TSO6 |
2650 NETIF_F_LRO;
2651 if (dma64)
2652 netdev->hw_features |= NETIF_F_HIGHDMA;
2653 netdev->vlan_features = netdev->hw_features &
2654 ~(NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2655 netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_FILTER;
2656
2657 netdev_info(adapter->netdev,
2658 "features: sg csum vlan jf tso tsoIPv6 lro%s\n",
2659 dma64 ? " highDMA" : "");
2660 }
2661
2662
2663 static void
2664 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2665 {
2666 u32 tmp;
2667
2668 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
2669 *(u32 *)mac = tmp;
2670
2671 tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
2672 mac[4] = tmp & 0xff;
2673 mac[5] = (tmp >> 8) & 0xff;
2674 }
2675
2676 #ifdef CONFIG_PCI_MSI
2677
2678 /*
2679 * Enable MSIx vectors.
2680 * Returns :
2681 * 0 on successful enabling of required vectors,
2682 * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
2683 * could be enabled.
2684 * number of vectors which can be enabled otherwise (this number is smaller
2685 * than VMXNET3_LINUX_MIN_MSIX_VECT)
2686 */
2687
2688 static int
2689 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
2690 int vectors)
2691 {
2692 int err = 0, vector_threshold;
2693 vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
2694
2695 while (vectors >= vector_threshold) {
2696 err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
2697 vectors);
2698 if (!err) {
2699 adapter->intr.num_intrs = vectors;
2700 return 0;
2701 } else if (err < 0) {
2702 netdev_err(adapter->netdev,
2703 "Failed to enable MSI-X, error: %d\n", err);
2704 vectors = 0;
2705 } else if (err < vector_threshold) {
2706 break;
2707 } else {
2708 /* If fails to enable required number of MSI-x vectors
2709 * try enabling minimum number of vectors required.
2710 */
2711 netdev_err(adapter->netdev,
2712 "Failed to enable %d MSI-X, trying %d instead\n",
2713 vectors, vector_threshold);
2714 vectors = vector_threshold;
2715 }
2716 }
2717
2718 netdev_info(adapter->netdev,
2719 "Number of MSI-X interrupts which can be allocated are lower than min threshold required.\n");
2720 return err;
2721 }
2722
2723
2724 #endif /* CONFIG_PCI_MSI */
2725
2726 static void
2727 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
2728 {
2729 u32 cfg;
2730 unsigned long flags;
2731
2732 /* intr settings */
2733 spin_lock_irqsave(&adapter->cmd_lock, flags);
2734 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2735 VMXNET3_CMD_GET_CONF_INTR);
2736 cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2737 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2738 adapter->intr.type = cfg & 0x3;
2739 adapter->intr.mask_mode = (cfg >> 2) & 0x3;
2740
2741 if (adapter->intr.type == VMXNET3_IT_AUTO) {
2742 adapter->intr.type = VMXNET3_IT_MSIX;
2743 }
2744
2745 #ifdef CONFIG_PCI_MSI
2746 if (adapter->intr.type == VMXNET3_IT_MSIX) {
2747 int vector, err = 0;
2748
2749 adapter->intr.num_intrs = (adapter->share_intr ==
2750 VMXNET3_INTR_TXSHARE) ? 1 :
2751 adapter->num_tx_queues;
2752 adapter->intr.num_intrs += (adapter->share_intr ==
2753 VMXNET3_INTR_BUDDYSHARE) ? 0 :
2754 adapter->num_rx_queues;
2755 adapter->intr.num_intrs += 1; /* for link event */
2756
2757 adapter->intr.num_intrs = (adapter->intr.num_intrs >
2758 VMXNET3_LINUX_MIN_MSIX_VECT
2759 ? adapter->intr.num_intrs :
2760 VMXNET3_LINUX_MIN_MSIX_VECT);
2761
2762 for (vector = 0; vector < adapter->intr.num_intrs; vector++)
2763 adapter->intr.msix_entries[vector].entry = vector;
2764
2765 err = vmxnet3_acquire_msix_vectors(adapter,
2766 adapter->intr.num_intrs);
2767 /* If we cannot allocate one MSIx vector per queue
2768 * then limit the number of rx queues to 1
2769 */
2770 if (err == VMXNET3_LINUX_MIN_MSIX_VECT) {
2771 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
2772 || adapter->num_rx_queues != 1) {
2773 adapter->share_intr = VMXNET3_INTR_TXSHARE;
2774 printk(KERN_ERR "Number of rx queues : 1\n");
2775 adapter->num_rx_queues = 1;
2776 adapter->intr.num_intrs =
2777 VMXNET3_LINUX_MIN_MSIX_VECT;
2778 }
2779 return;
2780 }
2781 if (!err)
2782 return;
2783
2784 /* If we cannot allocate MSIx vectors use only one rx queue */
2785 netdev_info(adapter->netdev,
2786 "Failed to enable MSI-X, error %d . Limiting #rx queues to 1, try MSI.\n",
2787 err);
2788
2789 adapter->intr.type = VMXNET3_IT_MSI;
2790 }
2791
2792 if (adapter->intr.type == VMXNET3_IT_MSI) {
2793 int err;
2794 err = pci_enable_msi(adapter->pdev);
2795 if (!err) {
2796 adapter->num_rx_queues = 1;
2797 adapter->intr.num_intrs = 1;
2798 return;
2799 }
2800 }
2801 #endif /* CONFIG_PCI_MSI */
2802
2803 adapter->num_rx_queues = 1;
2804 printk(KERN_INFO "Using INTx interrupt, #Rx queues: 1.\n");
2805 adapter->intr.type = VMXNET3_IT_INTX;
2806
2807 /* INT-X related setting */
2808 adapter->intr.num_intrs = 1;
2809 }
2810
2811
2812 static void
2813 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
2814 {
2815 if (adapter->intr.type == VMXNET3_IT_MSIX)
2816 pci_disable_msix(adapter->pdev);
2817 else if (adapter->intr.type == VMXNET3_IT_MSI)
2818 pci_disable_msi(adapter->pdev);
2819 else
2820 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
2821 }
2822
2823
2824 static void
2825 vmxnet3_tx_timeout(struct net_device *netdev)
2826 {
2827 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2828 adapter->tx_timeout_count++;
2829
2830 printk(KERN_ERR "%s: tx hang\n", adapter->netdev->name);
2831 schedule_work(&adapter->work);
2832 netif_wake_queue(adapter->netdev);
2833 }
2834
2835
2836 static void
2837 vmxnet3_reset_work(struct work_struct *data)
2838 {
2839 struct vmxnet3_adapter *adapter;
2840
2841 adapter = container_of(data, struct vmxnet3_adapter, work);
2842
2843 /* if another thread is resetting the device, no need to proceed */
2844 if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2845 return;
2846
2847 /* if the device is closed, we must leave it alone */
2848 rtnl_lock();
2849 if (netif_running(adapter->netdev)) {
2850 printk(KERN_INFO "%s: resetting\n", adapter->netdev->name);
2851 vmxnet3_quiesce_dev(adapter);
2852 vmxnet3_reset_dev(adapter);
2853 vmxnet3_activate_dev(adapter);
2854 } else {
2855 printk(KERN_INFO "%s: already closed\n", adapter->netdev->name);
2856 }
2857 rtnl_unlock();
2858
2859 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2860 }
2861
2862
2863 static int __devinit
2864 vmxnet3_probe_device(struct pci_dev *pdev,
2865 const struct pci_device_id *id)
2866 {
2867 static const struct net_device_ops vmxnet3_netdev_ops = {
2868 .ndo_open = vmxnet3_open,
2869 .ndo_stop = vmxnet3_close,
2870 .ndo_start_xmit = vmxnet3_xmit_frame,
2871 .ndo_set_mac_address = vmxnet3_set_mac_addr,
2872 .ndo_change_mtu = vmxnet3_change_mtu,
2873 .ndo_set_features = vmxnet3_set_features,
2874 .ndo_get_stats64 = vmxnet3_get_stats64,
2875 .ndo_tx_timeout = vmxnet3_tx_timeout,
2876 .ndo_set_rx_mode = vmxnet3_set_mc,
2877 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
2878 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
2879 #ifdef CONFIG_NET_POLL_CONTROLLER
2880 .ndo_poll_controller = vmxnet3_netpoll,
2881 #endif
2882 };
2883 int err;
2884 bool dma64 = false; /* stupid gcc */
2885 u32 ver;
2886 struct net_device *netdev;
2887 struct vmxnet3_adapter *adapter;
2888 u8 mac[ETH_ALEN];
2889 int size;
2890 int num_tx_queues;
2891 int num_rx_queues;
2892
2893 if (!pci_msi_enabled())
2894 enable_mq = 0;
2895
2896 #ifdef VMXNET3_RSS
2897 if (enable_mq)
2898 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
2899 (int)num_online_cpus());
2900 else
2901 #endif
2902 num_rx_queues = 1;
2903 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
2904
2905 if (enable_mq)
2906 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
2907 (int)num_online_cpus());
2908 else
2909 num_tx_queues = 1;
2910
2911 num_tx_queues = rounddown_pow_of_two(num_tx_queues);
2912 netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
2913 max(num_tx_queues, num_rx_queues));
2914 printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
2915 num_tx_queues, num_rx_queues);
2916
2917 if (!netdev)
2918 return -ENOMEM;
2919
2920 pci_set_drvdata(pdev, netdev);
2921 adapter = netdev_priv(netdev);
2922 adapter->netdev = netdev;
2923 adapter->pdev = pdev;
2924
2925 spin_lock_init(&adapter->cmd_lock);
2926 adapter->shared = pci_alloc_consistent(adapter->pdev,
2927 sizeof(struct Vmxnet3_DriverShared),
2928 &adapter->shared_pa);
2929 if (!adapter->shared) {
2930 printk(KERN_ERR "Failed to allocate memory for %s\n",
2931 pci_name(pdev));
2932 err = -ENOMEM;
2933 goto err_alloc_shared;
2934 }
2935
2936 adapter->num_rx_queues = num_rx_queues;
2937 adapter->num_tx_queues = num_tx_queues;
2938
2939 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
2940 size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
2941 adapter->tqd_start = pci_alloc_consistent(adapter->pdev, size,
2942 &adapter->queue_desc_pa);
2943
2944 if (!adapter->tqd_start) {
2945 printk(KERN_ERR "Failed to allocate memory for %s\n",
2946 pci_name(pdev));
2947 err = -ENOMEM;
2948 goto err_alloc_queue_desc;
2949 }
2950 adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
2951 adapter->num_tx_queues);
2952
2953 adapter->pm_conf = kmalloc(sizeof(struct Vmxnet3_PMConf), GFP_KERNEL);
2954 if (adapter->pm_conf == NULL) {
2955 err = -ENOMEM;
2956 goto err_alloc_pm;
2957 }
2958
2959 #ifdef VMXNET3_RSS
2960
2961 adapter->rss_conf = kmalloc(sizeof(struct UPT1_RSSConf), GFP_KERNEL);
2962 if (adapter->rss_conf == NULL) {
2963 err = -ENOMEM;
2964 goto err_alloc_rss;
2965 }
2966 #endif /* VMXNET3_RSS */
2967
2968 err = vmxnet3_alloc_pci_resources(adapter, &dma64);
2969 if (err < 0)
2970 goto err_alloc_pci;
2971
2972 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
2973 if (ver & 1) {
2974 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1);
2975 } else {
2976 printk(KERN_ERR "Incompatible h/w version (0x%x) for adapter"
2977 " %s\n", ver, pci_name(pdev));
2978 err = -EBUSY;
2979 goto err_ver;
2980 }
2981
2982 ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
2983 if (ver & 1) {
2984 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
2985 } else {
2986 printk(KERN_ERR "Incompatible upt version (0x%x) for "
2987 "adapter %s\n", ver, pci_name(pdev));
2988 err = -EBUSY;
2989 goto err_ver;
2990 }
2991
2992 SET_NETDEV_DEV(netdev, &pdev->dev);
2993 vmxnet3_declare_features(adapter, dma64);
2994
2995 adapter->dev_number = atomic_read(&devices_found);
2996
2997 adapter->share_intr = irq_share_mode;
2998 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE &&
2999 adapter->num_tx_queues != adapter->num_rx_queues)
3000 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3001
3002 vmxnet3_alloc_intr_resources(adapter);
3003
3004 #ifdef VMXNET3_RSS
3005 if (adapter->num_rx_queues > 1 &&
3006 adapter->intr.type == VMXNET3_IT_MSIX) {
3007 adapter->rss = true;
3008 printk(KERN_INFO "RSS is enabled.\n");
3009 } else {
3010 adapter->rss = false;
3011 }
3012 #endif
3013
3014 vmxnet3_read_mac_addr(adapter, mac);
3015 memcpy(netdev->dev_addr, mac, netdev->addr_len);
3016
3017 netdev->netdev_ops = &vmxnet3_netdev_ops;
3018 vmxnet3_set_ethtool_ops(netdev);
3019 netdev->watchdog_timeo = 5 * HZ;
3020
3021 INIT_WORK(&adapter->work, vmxnet3_reset_work);
3022
3023 if (adapter->intr.type == VMXNET3_IT_MSIX) {
3024 int i;
3025 for (i = 0; i < adapter->num_rx_queues; i++) {
3026 netif_napi_add(adapter->netdev,
3027 &adapter->rx_queue[i].napi,
3028 vmxnet3_poll_rx_only, 64);
3029 }
3030 } else {
3031 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3032 vmxnet3_poll, 64);
3033 }
3034
3035 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3036 netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3037
3038 err = register_netdev(netdev);
3039
3040 if (err) {
3041 printk(KERN_ERR "Failed to register adapter %s\n",
3042 pci_name(pdev));
3043 goto err_register;
3044 }
3045
3046 set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3047 vmxnet3_check_link(adapter, false);
3048 atomic_inc(&devices_found);
3049 return 0;
3050
3051 err_register:
3052 vmxnet3_free_intr_resources(adapter);
3053 err_ver:
3054 vmxnet3_free_pci_resources(adapter);
3055 err_alloc_pci:
3056 #ifdef VMXNET3_RSS
3057 kfree(adapter->rss_conf);
3058 err_alloc_rss:
3059 #endif
3060 kfree(adapter->pm_conf);
3061 err_alloc_pm:
3062 pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3063 adapter->queue_desc_pa);
3064 err_alloc_queue_desc:
3065 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3066 adapter->shared, adapter->shared_pa);
3067 err_alloc_shared:
3068 pci_set_drvdata(pdev, NULL);
3069 free_netdev(netdev);
3070 return err;
3071 }
3072
3073
3074 static void __devexit
3075 vmxnet3_remove_device(struct pci_dev *pdev)
3076 {
3077 struct net_device *netdev = pci_get_drvdata(pdev);
3078 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3079 int size = 0;
3080 int num_rx_queues;
3081
3082 #ifdef VMXNET3_RSS
3083 if (enable_mq)
3084 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3085 (int)num_online_cpus());
3086 else
3087 #endif
3088 num_rx_queues = 1;
3089 num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3090
3091 cancel_work_sync(&adapter->work);
3092
3093 unregister_netdev(netdev);
3094
3095 vmxnet3_free_intr_resources(adapter);
3096 vmxnet3_free_pci_resources(adapter);
3097 #ifdef VMXNET3_RSS
3098 kfree(adapter->rss_conf);
3099 #endif
3100 kfree(adapter->pm_conf);
3101
3102 size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3103 size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3104 pci_free_consistent(adapter->pdev, size, adapter->tqd_start,
3105 adapter->queue_desc_pa);
3106 pci_free_consistent(adapter->pdev, sizeof(struct Vmxnet3_DriverShared),
3107 adapter->shared, adapter->shared_pa);
3108 free_netdev(netdev);
3109 }
3110
3111
3112 #ifdef CONFIG_PM
3113
3114 static int
3115 vmxnet3_suspend(struct device *device)
3116 {
3117 struct pci_dev *pdev = to_pci_dev(device);
3118 struct net_device *netdev = pci_get_drvdata(pdev);
3119 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3120 struct Vmxnet3_PMConf *pmConf;
3121 struct ethhdr *ehdr;
3122 struct arphdr *ahdr;
3123 u8 *arpreq;
3124 struct in_device *in_dev;
3125 struct in_ifaddr *ifa;
3126 unsigned long flags;
3127 int i = 0;
3128
3129 if (!netif_running(netdev))
3130 return 0;
3131
3132 for (i = 0; i < adapter->num_rx_queues; i++)
3133 napi_disable(&adapter->rx_queue[i].napi);
3134
3135 vmxnet3_disable_all_intrs(adapter);
3136 vmxnet3_free_irqs(adapter);
3137 vmxnet3_free_intr_resources(adapter);
3138
3139 netif_device_detach(netdev);
3140 netif_tx_stop_all_queues(netdev);
3141
3142 /* Create wake-up filters. */
3143 pmConf = adapter->pm_conf;
3144 memset(pmConf, 0, sizeof(*pmConf));
3145
3146 if (adapter->wol & WAKE_UCAST) {
3147 pmConf->filters[i].patternSize = ETH_ALEN;
3148 pmConf->filters[i].maskSize = 1;
3149 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3150 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3151
3152 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3153 i++;
3154 }
3155
3156 if (adapter->wol & WAKE_ARP) {
3157 in_dev = in_dev_get(netdev);
3158 if (!in_dev)
3159 goto skip_arp;
3160
3161 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3162 if (!ifa)
3163 goto skip_arp;
3164
3165 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3166 sizeof(struct arphdr) + /* ARP header */
3167 2 * ETH_ALEN + /* 2 Ethernet addresses*/
3168 2 * sizeof(u32); /*2 IPv4 addresses */
3169 pmConf->filters[i].maskSize =
3170 (pmConf->filters[i].patternSize - 1) / 8 + 1;
3171
3172 /* ETH_P_ARP in Ethernet header. */
3173 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3174 ehdr->h_proto = htons(ETH_P_ARP);
3175
3176 /* ARPOP_REQUEST in ARP header. */
3177 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3178 ahdr->ar_op = htons(ARPOP_REQUEST);
3179 arpreq = (u8 *)(ahdr + 1);
3180
3181 /* The Unicast IPv4 address in 'tip' field. */
3182 arpreq += 2 * ETH_ALEN + sizeof(u32);
3183 *(u32 *)arpreq = ifa->ifa_address;
3184
3185 /* The mask for the relevant bits. */
3186 pmConf->filters[i].mask[0] = 0x00;
3187 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3188 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3189 pmConf->filters[i].mask[3] = 0x00;
3190 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3191 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3192 in_dev_put(in_dev);
3193
3194 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3195 i++;
3196 }
3197
3198 skip_arp:
3199 if (adapter->wol & WAKE_MAGIC)
3200 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3201
3202 pmConf->numFilters = i;
3203
3204 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3205 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3206 *pmConf));
3207 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3208 pmConf));
3209
3210 spin_lock_irqsave(&adapter->cmd_lock, flags);
3211 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3212 VMXNET3_CMD_UPDATE_PMCFG);
3213 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3214
3215 pci_save_state(pdev);
3216 pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3217 adapter->wol);
3218 pci_disable_device(pdev);
3219 pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3220
3221 return 0;
3222 }
3223
3224
3225 static int
3226 vmxnet3_resume(struct device *device)
3227 {
3228 int err, i = 0;
3229 unsigned long flags;
3230 struct pci_dev *pdev = to_pci_dev(device);
3231 struct net_device *netdev = pci_get_drvdata(pdev);
3232 struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3233 struct Vmxnet3_PMConf *pmConf;
3234
3235 if (!netif_running(netdev))
3236 return 0;
3237
3238 /* Destroy wake-up filters. */
3239 pmConf = adapter->pm_conf;
3240 memset(pmConf, 0, sizeof(*pmConf));
3241
3242 adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3243 adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3244 *pmConf));
3245 adapter->shared->devRead.pmConfDesc.confPA = cpu_to_le64(virt_to_phys(
3246 pmConf));
3247
3248 netif_device_attach(netdev);
3249 pci_set_power_state(pdev, PCI_D0);
3250 pci_restore_state(pdev);
3251 err = pci_enable_device_mem(pdev);
3252 if (err != 0)
3253 return err;
3254
3255 pci_enable_wake(pdev, PCI_D0, 0);
3256
3257 spin_lock_irqsave(&adapter->cmd_lock, flags);
3258 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3259 VMXNET3_CMD_UPDATE_PMCFG);
3260 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3261 vmxnet3_alloc_intr_resources(adapter);
3262 vmxnet3_request_irqs(adapter);
3263 for (i = 0; i < adapter->num_rx_queues; i++)
3264 napi_enable(&adapter->rx_queue[i].napi);
3265 vmxnet3_enable_all_intrs(adapter);
3266
3267 return 0;
3268 }
3269
3270 static const struct dev_pm_ops vmxnet3_pm_ops = {
3271 .suspend = vmxnet3_suspend,
3272 .resume = vmxnet3_resume,
3273 };
3274 #endif
3275
3276 static struct pci_driver vmxnet3_driver = {
3277 .name = vmxnet3_driver_name,
3278 .id_table = vmxnet3_pciid_table,
3279 .probe = vmxnet3_probe_device,
3280 .remove = __devexit_p(vmxnet3_remove_device),
3281 #ifdef CONFIG_PM
3282 .driver.pm = &vmxnet3_pm_ops,
3283 #endif
3284 };
3285
3286
3287 static int __init
3288 vmxnet3_init_module(void)
3289 {
3290 printk(KERN_INFO "%s - version %s\n", VMXNET3_DRIVER_DESC,
3291 VMXNET3_DRIVER_VERSION_REPORT);
3292 return pci_register_driver(&vmxnet3_driver);
3293 }
3294
3295 module_init(vmxnet3_init_module);
3296
3297
3298 static void
3299 vmxnet3_exit_module(void)
3300 {
3301 pci_unregister_driver(&vmxnet3_driver);
3302 }
3303
3304 module_exit(vmxnet3_exit_module);
3305
3306 MODULE_AUTHOR("VMware, Inc.");
3307 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3308 MODULE_LICENSE("GPL v2");
3309 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
kernel source for telekom puls (alcatel/mediatek)