vmxnet3: must split too big fragments
[linux-omap-dss2:linux.git] / drivers / net / vmxnet3 / vmxnet3_drv.c
1 /*
2  * Linux driver for VMware's vmxnet3 ethernet NIC.
3  *
4  * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; version 2 of the License and no later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13  * NON INFRINGEMENT. See the GNU General Public License for more
14  * details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * The full GNU General Public License is included in this distribution in
21  * the file called "COPYING".
22  *
23  * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
24  *
25  */
26
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29
30 #include "vmxnet3_int.h"
31
32 char vmxnet3_driver_name[] = "vmxnet3";
33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
34
35 /*
36  * PCI Device ID Table
37  * Last entry must be all 0s
38  */
39 static 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                 u32 buf_size;
748
749                 buf_offset = 0;
750                 len = skb_frag_size(frag);
751                 while (len) {
752                         tbi = tq->buf_info + tq->tx_ring.next2fill;
753                         if (len < VMXNET3_MAX_TX_BUF_SIZE) {
754                                 buf_size = len;
755                                 dw2 |= len;
756                         } else {
757                                 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
758                                 /* spec says that for TxDesc.len, 0 == 2^14 */
759                         }
760                         tbi->map_type = VMXNET3_MAP_PAGE;
761                         tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
762                                                          buf_offset, buf_size,
763                                                          DMA_TO_DEVICE);
764
765                         tbi->len = buf_size;
766
767                         gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
768                         BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
769
770                         gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
771                         gdesc->dword[2] = cpu_to_le32(dw2);
772                         gdesc->dword[3] = 0;
773
774                         dev_dbg(&adapter->netdev->dev,
775                                 "txd[%u]: 0x%llu %u %u\n",
776                                 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
777                                 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
778                         vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
779                         dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
780
781                         len -= buf_size;
782                         buf_offset += buf_size;
783                 }
784         }
785
786         ctx->eop_txd = gdesc;
787
788         /* set the last buf_info for the pkt */
789         tbi->skb = skb;
790         tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
791 }
792
793
794 /* Init all tx queues */
795 static void
796 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
797 {
798         int i;
799
800         for (i = 0; i < adapter->num_tx_queues; i++)
801                 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
802 }
803
804
805 /*
806  *    parse and copy relevant protocol headers:
807  *      For a tso pkt, relevant headers are L2/3/4 including options
808  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
809  *      if it's a TCP/UDP pkt
810  *
811  * Returns:
812  *    -1:  error happens during parsing
813  *     0:  protocol headers parsed, but too big to be copied
814  *     1:  protocol headers parsed and copied
815  *
816  * Other effects:
817  *    1. related *ctx fields are updated.
818  *    2. ctx->copy_size is # of bytes copied
819  *    3. the portion copied is guaranteed to be in the linear part
820  *
821  */
822 static int
823 vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
824                            struct vmxnet3_tx_ctx *ctx,
825                            struct vmxnet3_adapter *adapter)
826 {
827         struct Vmxnet3_TxDataDesc *tdd;
828
829         if (ctx->mss) { /* TSO */
830                 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
831                 ctx->l4_hdr_size = tcp_hdrlen(skb);
832                 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
833         } else {
834                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
835                         ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
836
837                         if (ctx->ipv4) {
838                                 const struct iphdr *iph = ip_hdr(skb);
839
840                                 if (iph->protocol == IPPROTO_TCP)
841                                         ctx->l4_hdr_size = tcp_hdrlen(skb);
842                                 else if (iph->protocol == IPPROTO_UDP)
843                                         ctx->l4_hdr_size = sizeof(struct udphdr);
844                                 else
845                                         ctx->l4_hdr_size = 0;
846                         } else {
847                                 /* for simplicity, don't copy L4 headers */
848                                 ctx->l4_hdr_size = 0;
849                         }
850                         ctx->copy_size = min(ctx->eth_ip_hdr_size +
851                                          ctx->l4_hdr_size, skb->len);
852                 } else {
853                         ctx->eth_ip_hdr_size = 0;
854                         ctx->l4_hdr_size = 0;
855                         /* copy as much as allowed */
856                         ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE
857                                              , skb_headlen(skb));
858                 }
859
860                 /* make sure headers are accessible directly */
861                 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
862                         goto err;
863         }
864
865         if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) {
866                 tq->stats.oversized_hdr++;
867                 ctx->copy_size = 0;
868                 return 0;
869         }
870
871         tdd = tq->data_ring.base + tq->tx_ring.next2fill;
872
873         memcpy(tdd->data, skb->data, ctx->copy_size);
874         dev_dbg(&adapter->netdev->dev,
875                 "copy %u bytes to dataRing[%u]\n",
876                 ctx->copy_size, tq->tx_ring.next2fill);
877         return 1;
878
879 err:
880         return -1;
881 }
882
883
884 static void
885 vmxnet3_prepare_tso(struct sk_buff *skb,
886                     struct vmxnet3_tx_ctx *ctx)
887 {
888         struct tcphdr *tcph = tcp_hdr(skb);
889
890         if (ctx->ipv4) {
891                 struct iphdr *iph = ip_hdr(skb);
892
893                 iph->check = 0;
894                 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
895                                                  IPPROTO_TCP, 0);
896         } else {
897                 struct ipv6hdr *iph = ipv6_hdr(skb);
898
899                 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
900                                                IPPROTO_TCP, 0);
901         }
902 }
903
904 static int txd_estimate(const struct sk_buff *skb)
905 {
906         int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
907         int i;
908
909         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
910                 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
911
912                 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
913         }
914         return count;
915 }
916
917 /*
918  * Transmits a pkt thru a given tq
919  * Returns:
920  *    NETDEV_TX_OK:      descriptors are setup successfully
921  *    NETDEV_TX_OK:      error occurred, the pkt is dropped
922  *    NETDEV_TX_BUSY:    tx ring is full, queue is stopped
923  *
924  * Side-effects:
925  *    1. tx ring may be changed
926  *    2. tq stats may be updated accordingly
927  *    3. shared->txNumDeferred may be updated
928  */
929
930 static int
931 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
932                 struct vmxnet3_adapter *adapter, struct net_device *netdev)
933 {
934         int ret;
935         u32 count;
936         unsigned long flags;
937         struct vmxnet3_tx_ctx ctx;
938         union Vmxnet3_GenericDesc *gdesc;
939 #ifdef __BIG_ENDIAN_BITFIELD
940         /* Use temporary descriptor to avoid touching bits multiple times */
941         union Vmxnet3_GenericDesc tempTxDesc;
942 #endif
943
944         count = txd_estimate(skb);
945
946         ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
947
948         ctx.mss = skb_shinfo(skb)->gso_size;
949         if (ctx.mss) {
950                 if (skb_header_cloned(skb)) {
951                         if (unlikely(pskb_expand_head(skb, 0, 0,
952                                                       GFP_ATOMIC) != 0)) {
953                                 tq->stats.drop_tso++;
954                                 goto drop_pkt;
955                         }
956                         tq->stats.copy_skb_header++;
957                 }
958                 vmxnet3_prepare_tso(skb, &ctx);
959         } else {
960                 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
961
962                         /* non-tso pkts must not use more than
963                          * VMXNET3_MAX_TXD_PER_PKT entries
964                          */
965                         if (skb_linearize(skb) != 0) {
966                                 tq->stats.drop_too_many_frags++;
967                                 goto drop_pkt;
968                         }
969                         tq->stats.linearized++;
970
971                         /* recalculate the # of descriptors to use */
972                         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
973                 }
974         }
975
976         spin_lock_irqsave(&tq->tx_lock, flags);
977
978         if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
979                 tq->stats.tx_ring_full++;
980                 dev_dbg(&adapter->netdev->dev,
981                         "tx queue stopped on %s, next2comp %u"
982                         " next2fill %u\n", adapter->netdev->name,
983                         tq->tx_ring.next2comp, tq->tx_ring.next2fill);
984
985                 vmxnet3_tq_stop(tq, adapter);
986                 spin_unlock_irqrestore(&tq->tx_lock, flags);
987                 return NETDEV_TX_BUSY;
988         }
989
990
991         ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter);
992         if (ret >= 0) {
993                 BUG_ON(ret <= 0 && ctx.copy_size != 0);
994                 /* hdrs parsed, check against other limits */
995                 if (ctx.mss) {
996                         if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
997                                      VMXNET3_MAX_TX_BUF_SIZE)) {
998                                 goto hdr_too_big;
999                         }
1000                 } else {
1001                         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1002                                 if (unlikely(ctx.eth_ip_hdr_size +
1003                                              skb->csum_offset >
1004                                              VMXNET3_MAX_CSUM_OFFSET)) {
1005                                         goto hdr_too_big;
1006                                 }
1007                         }
1008                 }
1009         } else {
1010                 tq->stats.drop_hdr_inspect_err++;
1011                 goto unlock_drop_pkt;
1012         }
1013
1014         /* fill tx descs related to addr & len */
1015         vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter);
1016
1017         /* setup the EOP desc */
1018         ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1019
1020         /* setup the SOP desc */
1021 #ifdef __BIG_ENDIAN_BITFIELD
1022         gdesc = &tempTxDesc;
1023         gdesc->dword[2] = ctx.sop_txd->dword[2];
1024         gdesc->dword[3] = ctx.sop_txd->dword[3];
1025 #else
1026         gdesc = ctx.sop_txd;
1027 #endif
1028         if (ctx.mss) {
1029                 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1030                 gdesc->txd.om = VMXNET3_OM_TSO;
1031                 gdesc->txd.msscof = ctx.mss;
1032                 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1033                              gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1034         } else {
1035                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1036                         gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1037                         gdesc->txd.om = VMXNET3_OM_CSUM;
1038                         gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1039                                             skb->csum_offset;
1040                 } else {
1041                         gdesc->txd.om = 0;
1042                         gdesc->txd.msscof = 0;
1043                 }
1044                 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1045         }
1046
1047         if (vlan_tx_tag_present(skb)) {
1048                 gdesc->txd.ti = 1;
1049                 gdesc->txd.tci = vlan_tx_tag_get(skb);
1050         }
1051
1052         /* finally flips the GEN bit of the SOP desc. */
1053         gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1054                                                   VMXNET3_TXD_GEN);
1055 #ifdef __BIG_ENDIAN_BITFIELD
1056         /* Finished updating in bitfields of Tx Desc, so write them in original
1057          * place.
1058          */
1059         vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1060                            (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1061         gdesc = ctx.sop_txd;
1062 #endif
1063         dev_dbg(&adapter->netdev->dev,
1064                 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1065                 (u32)(ctx.sop_txd -
1066                 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1067                 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1068
1069         spin_unlock_irqrestore(&tq->tx_lock, flags);
1070
1071         if (le32_to_cpu(tq->shared->txNumDeferred) >=
1072                                         le32_to_cpu(tq->shared->txThreshold)) {
1073                 tq->shared->txNumDeferred = 0;
1074                 VMXNET3_WRITE_BAR0_REG(adapter,
1075                                        VMXNET3_REG_TXPROD + tq->qid * 8,
1076                                        tq->tx_ring.next2fill);
1077         }
1078
1079         return NETDEV_TX_OK;
1080
1081 hdr_too_big:
1082         tq->stats.drop_oversized_hdr++;
1083 unlock_drop_pkt:
1084         spin_unlock_irqrestore(&tq->tx_lock, flags);
1085 drop_pkt:
1086         tq->stats.drop_total++;
1087         dev_kfree_skb(skb);
1088         return NETDEV_TX_OK;
1089 }
1090
1091
1092 static netdev_tx_t
1093 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1094 {
1095         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1096
1097                 BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1098                 return vmxnet3_tq_xmit(skb,
1099                                        &adapter->tx_queue[skb->queue_mapping],
1100                                        adapter, netdev);
1101 }
1102
1103
1104 static void
1105 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1106                 struct sk_buff *skb,
1107                 union Vmxnet3_GenericDesc *gdesc)
1108 {
1109         if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1110                 /* typical case: TCP/UDP over IP and both csums are correct */
1111                 if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) ==
1112                                                         VMXNET3_RCD_CSUM_OK) {
1113                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1114                         BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1115                         BUG_ON(!(gdesc->rcd.v4  || gdesc->rcd.v6));
1116                         BUG_ON(gdesc->rcd.frg);
1117                 } else {
1118                         if (gdesc->rcd.csum) {
1119                                 skb->csum = htons(gdesc->rcd.csum);
1120                                 skb->ip_summed = CHECKSUM_PARTIAL;
1121                         } else {
1122                                 skb_checksum_none_assert(skb);
1123                         }
1124                 }
1125         } else {
1126                 skb_checksum_none_assert(skb);
1127         }
1128 }
1129
1130
1131 static void
1132 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1133                  struct vmxnet3_rx_ctx *ctx,  struct vmxnet3_adapter *adapter)
1134 {
1135         rq->stats.drop_err++;
1136         if (!rcd->fcs)
1137                 rq->stats.drop_fcs++;
1138
1139         rq->stats.drop_total++;
1140
1141         /*
1142          * We do not unmap and chain the rx buffer to the skb.
1143          * We basically pretend this buffer is not used and will be recycled
1144          * by vmxnet3_rq_alloc_rx_buf()
1145          */
1146
1147         /*
1148          * ctx->skb may be NULL if this is the first and the only one
1149          * desc for the pkt
1150          */
1151         if (ctx->skb)
1152                 dev_kfree_skb_irq(ctx->skb);
1153
1154         ctx->skb = NULL;
1155 }
1156
1157
1158 static int
1159 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1160                        struct vmxnet3_adapter *adapter, int quota)
1161 {
1162         static const u32 rxprod_reg[2] = {
1163                 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1164         };
1165         u32 num_rxd = 0;
1166         bool skip_page_frags = false;
1167         struct Vmxnet3_RxCompDesc *rcd;
1168         struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1169 #ifdef __BIG_ENDIAN_BITFIELD
1170         struct Vmxnet3_RxDesc rxCmdDesc;
1171         struct Vmxnet3_RxCompDesc rxComp;
1172 #endif
1173         vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1174                           &rxComp);
1175         while (rcd->gen == rq->comp_ring.gen) {
1176                 struct vmxnet3_rx_buf_info *rbi;
1177                 struct sk_buff *skb, *new_skb = NULL;
1178                 struct page *new_page = NULL;
1179                 int num_to_alloc;
1180                 struct Vmxnet3_RxDesc *rxd;
1181                 u32 idx, ring_idx;
1182                 struct vmxnet3_cmd_ring *ring = NULL;
1183                 if (num_rxd >= quota) {
1184                         /* we may stop even before we see the EOP desc of
1185                          * the current pkt
1186                          */
1187                         break;
1188                 }
1189                 num_rxd++;
1190                 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2);
1191                 idx = rcd->rxdIdx;
1192                 ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1;
1193                 ring = rq->rx_ring + ring_idx;
1194                 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1195                                   &rxCmdDesc);
1196                 rbi = rq->buf_info[ring_idx] + idx;
1197
1198                 BUG_ON(rxd->addr != rbi->dma_addr ||
1199                        rxd->len != rbi->len);
1200
1201                 if (unlikely(rcd->eop && rcd->err)) {
1202                         vmxnet3_rx_error(rq, rcd, ctx, adapter);
1203                         goto rcd_done;
1204                 }
1205
1206                 if (rcd->sop) { /* first buf of the pkt */
1207                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1208                                rcd->rqID != rq->qid);
1209
1210                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1211                         BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1212
1213                         if (unlikely(rcd->len == 0)) {
1214                                 /* Pretend the rx buffer is skipped. */
1215                                 BUG_ON(!(rcd->sop && rcd->eop));
1216                                 dev_dbg(&adapter->netdev->dev,
1217                                         "rxRing[%u][%u] 0 length\n",
1218                                         ring_idx, idx);
1219                                 goto rcd_done;
1220                         }
1221
1222                         skip_page_frags = false;
1223                         ctx->skb = rbi->skb;
1224                         new_skb = dev_alloc_skb(rbi->len + NET_IP_ALIGN);
1225                         if (new_skb == NULL) {
1226                                 /* Skb allocation failed, do not handover this
1227                                  * skb to stack. Reuse it. Drop the existing pkt
1228                                  */
1229                                 rq->stats.rx_buf_alloc_failure++;
1230                                 ctx->skb = NULL;
1231                                 rq->stats.drop_total++;
1232                                 skip_page_frags = true;
1233                                 goto rcd_done;
1234                         }
1235
1236                         pci_unmap_single(adapter->pdev, rbi->dma_addr, rbi->len,
1237                                          PCI_DMA_FROMDEVICE);
1238
1239                         skb_put(ctx->skb, rcd->len);
1240
1241                         /* Immediate refill */
1242                         new_skb->dev = adapter->netdev;
1243                         skb_reserve(new_skb, NET_IP_ALIGN);
1244                         rbi->skb = new_skb;
1245                         rbi->dma_addr = pci_map_single(adapter->pdev,
1246                                         rbi->skb->data, rbi->len,
1247                                         PCI_DMA_FROMDEVICE);
1248                         rxd->addr = cpu_to_le64(rbi->dma_addr);
1249                         rxd->len = rbi->len;
1250
1251                 } else {
1252                         BUG_ON(ctx->skb == NULL && !skip_page_frags);
1253
1254                         /* non SOP buffer must be type 1 in most cases */
1255                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1256                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1257
1258                         /* If an sop buffer was dropped, skip all
1259                          * following non-sop fragments. They will be reused.
1260                          */
1261                         if (skip_page_frags)
1262                                 goto rcd_done;
1263
1264                         new_page = alloc_page(GFP_ATOMIC);
1265                         if (unlikely(new_page == NULL)) {
1266                                 /* Replacement page frag could not be allocated.
1267                                  * Reuse this page. Drop the pkt and free the
1268                                  * skb which contained this page as a frag. Skip
1269                                  * processing all the following non-sop frags.
1270                                  */
1271                                 rq->stats.rx_buf_alloc_failure++;
1272                                 dev_kfree_skb(ctx->skb);
1273                                 ctx->skb = NULL;
1274                                 skip_page_frags = true;
1275                                 goto rcd_done;
1276                         }
1277
1278                         if (rcd->len) {
1279                                 pci_unmap_page(adapter->pdev,
1280                                                rbi->dma_addr, rbi->len,
1281                                                PCI_DMA_FROMDEVICE);
1282
1283                                 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1284                         }
1285
1286                         /* Immediate refill */
1287                         rbi->page = new_page;
1288                         rbi->dma_addr = pci_map_page(adapter->pdev, rbi->page,
1289                                                      0, PAGE_SIZE,
1290                                                      PCI_DMA_FROMDEVICE);
1291                         rxd->addr = cpu_to_le64(rbi->dma_addr);
1292                         rxd->len = rbi->len;
1293                 }
1294
1295
1296                 skb = ctx->skb;
1297                 if (rcd->eop) {
1298                         skb->len += skb->data_len;
1299
1300                         vmxnet3_rx_csum(adapter, skb,
1301                                         (union Vmxnet3_GenericDesc *)rcd);
1302                         skb->protocol = eth_type_trans(skb, adapter->netdev);
1303
1304                         if (unlikely(rcd->ts))
1305                                 __vlan_hwaccel_put_tag(skb, rcd->tci);
1306
1307                         if (adapter->netdev->features & NETIF_F_LRO)
1308                                 netif_receive_skb(skb);
1309                         else
1310                                 napi_gro_receive(&rq->napi, skb);
1311
1312                         ctx->skb = NULL;
1313                 }
1314
1315 rcd_done:
1316                 /* device may have skipped some rx descs */
1317                 ring->next2comp = idx;
1318                 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1319                 ring = rq->rx_ring + ring_idx;
1320                 while (num_to_alloc) {
1321                         vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1322                                           &rxCmdDesc);
1323                         BUG_ON(!rxd->addr);
1324
1325                         /* Recv desc is ready to be used by the device */
1326                         rxd->gen = ring->gen;
1327                         vmxnet3_cmd_ring_adv_next2fill(ring);
1328                         num_to_alloc--;
1329                 }
1330
1331                 /* if needed, update the register */
1332                 if (unlikely(rq->shared->updateRxProd)) {
1333                         VMXNET3_WRITE_BAR0_REG(adapter,
1334                                 rxprod_reg[ring_idx] + rq->qid * 8,
1335                                 ring->next2fill);
1336                         rq->uncommitted[ring_idx] = 0;
1337                 }
1338
1339                 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1340                 vmxnet3_getRxComp(rcd,
1341                      &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1342         }
1343
1344         return num_rxd;
1345 }
1346
1347
1348 static void
1349 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1350                    struct vmxnet3_adapter *adapter)
1351 {
1352         u32 i, ring_idx;
1353         struct Vmxnet3_RxDesc *rxd;
1354
1355         for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1356                 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1357 #ifdef __BIG_ENDIAN_BITFIELD
1358                         struct Vmxnet3_RxDesc rxDesc;
1359 #endif
1360                         vmxnet3_getRxDesc(rxd,
1361                                 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1362
1363                         if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1364                                         rq->buf_info[ring_idx][i].skb) {
1365                                 pci_unmap_single(adapter->pdev, rxd->addr,
1366                                                  rxd->len, PCI_DMA_FROMDEVICE);
1367                                 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1368                                 rq->buf_info[ring_idx][i].skb = NULL;
1369                         } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1370                                         rq->buf_info[ring_idx][i].page) {
1371                                 pci_unmap_page(adapter->pdev, rxd->addr,
1372                                                rxd->len, PCI_DMA_FROMDEVICE);
1373                                 put_page(rq->buf_info[ring_idx][i].page);
1374                                 rq->buf_info[ring_idx][i].page = NULL;
1375                         }
1376                 }
1377
1378                 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1379                 rq->rx_ring[ring_idx].next2fill =
1380                                         rq->rx_ring[ring_idx].next2comp = 0;
1381                 rq->uncommitted[ring_idx] = 0;
1382         }
1383
1384         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1385         rq->comp_ring.next2proc = 0;
1386 }
1387
1388
1389 static void
1390 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1391 {
1392         int i;
1393
1394         for (i = 0; i < adapter->num_rx_queues; i++)
1395                 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1396 }
1397
1398
1399 void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1400                         struct vmxnet3_adapter *adapter)
1401 {
1402         int i;
1403         int j;
1404
1405         /* all rx buffers must have already been freed */
1406         for (i = 0; i < 2; i++) {
1407                 if (rq->buf_info[i]) {
1408                         for (j = 0; j < rq->rx_ring[i].size; j++)
1409                                 BUG_ON(rq->buf_info[i][j].page != NULL);
1410                 }
1411         }
1412
1413
1414         kfree(rq->buf_info[0]);
1415
1416         for (i = 0; i < 2; i++) {
1417                 if (rq->rx_ring[i].base) {
1418                         pci_free_consistent(adapter->pdev, rq->rx_ring[i].size
1419                                             * sizeof(struct Vmxnet3_RxDesc),
1420                                             rq->rx_ring[i].base,
1421                                             rq->rx_ring[i].basePA);
1422                         rq->rx_ring[i].base = NULL;
1423                 }
1424                 rq->buf_info[i] = NULL;
1425         }
1426
1427         if (rq->comp_ring.base) {
1428                 pci_free_consistent(adapter->pdev, rq->comp_ring.size *
1429                                     sizeof(struct Vmxnet3_RxCompDesc),
1430                                     rq->comp_ring.base, rq->comp_ring.basePA);
1431                 rq->comp_ring.base = NULL;
1432         }
1433 }
1434
1435
1436 static int
1437 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1438                 struct vmxnet3_adapter  *adapter)
1439 {
1440         int i;
1441
1442         /* initialize buf_info */
1443         for (i = 0; i < rq->rx_ring[0].size; i++) {
1444
1445                 /* 1st buf for a pkt is skbuff */
1446                 if (i % adapter->rx_buf_per_pkt == 0) {
1447                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1448                         rq->buf_info[0][i].len = adapter->skb_buf_size;
1449                 } else { /* subsequent bufs for a pkt is frag */
1450                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1451                         rq->buf_info[0][i].len = PAGE_SIZE;
1452                 }
1453         }
1454         for (i = 0; i < rq->rx_ring[1].size; i++) {
1455                 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1456                 rq->buf_info[1][i].len = PAGE_SIZE;
1457         }
1458
1459         /* reset internal state and allocate buffers for both rings */
1460         for (i = 0; i < 2; i++) {
1461                 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1462                 rq->uncommitted[i] = 0;
1463
1464                 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1465                        sizeof(struct Vmxnet3_RxDesc));
1466                 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1467         }
1468         if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1469                                     adapter) == 0) {
1470                 /* at least has 1 rx buffer for the 1st ring */
1471                 return -ENOMEM;
1472         }
1473         vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1474
1475         /* reset the comp ring */
1476         rq->comp_ring.next2proc = 0;
1477         memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1478                sizeof(struct Vmxnet3_RxCompDesc));
1479         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1480
1481         /* reset rxctx */
1482         rq->rx_ctx.skb = NULL;
1483
1484         /* stats are not reset */
1485         return 0;
1486 }
1487
1488
1489 static int
1490 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1491 {
1492         int i, err = 0;
1493
1494         for (i = 0; i < adapter->num_rx_queues; i++) {
1495                 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1496                 if (unlikely(err)) {
1497                         dev_err(&adapter->netdev->dev, "%s: failed to "
1498                                 "initialize rx queue%i\n",
1499                                 adapter->netdev->name, i);
1500                         break;
1501                 }
1502         }
1503         return err;
1504
1505 }
1506
1507
1508 static int
1509 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1510 {
1511         int i;
1512         size_t sz;
1513         struct vmxnet3_rx_buf_info *bi;
1514
1515         for (i = 0; i < 2; i++) {
1516
1517                 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1518                 rq->rx_ring[i].base = pci_alloc_consistent(adapter->pdev, sz,
1519                                                         &rq->rx_ring[i].basePA);
1520                 if (!rq->rx_ring[i].base) {
1521                         printk(KERN_ERR "%s: failed to allocate rx ring %d\n",
1522                                adapter->netdev->name, i);
1523                         goto err;
1524                 }
1525         }
1526
1527         sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1528         rq->comp_ring.base = pci_alloc_consistent(adapter->pdev, sz,
1529                                                   &rq->comp_ring.basePA);
1530         if (!rq->comp_ring.base) {
1531                 printk(KERN_ERR "%s: failed to allocate rx comp ring\n",
1532                        adapter->netdev->name);
1533                 goto err;
1534         }
1535
1536         sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1537                                                    rq->rx_ring[1].size);
1538         bi = kzalloc(sz, GFP_KERNEL);
1539         if (!bi)
1540                 goto err;
1541
1542         rq->buf_info[0] = bi;
1543         rq->buf_info[1] = bi + rq->rx_ring[0].size;
1544
1545         return 0;
1546
1547 err:
1548         vmxnet3_rq_destroy(rq, adapter);
1549         return -ENOMEM;
1550 }
1551
1552
1553 static int
1554 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1555 {
1556         int i, err = 0;
1557
1558         for (i = 0; i < adapter->num_rx_queues; i++) {
1559                 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1560                 if (unlikely(err)) {
1561                         dev_err(&adapter->netdev->dev,
1562                                 "%s: failed to create rx queue%i\n",
1563                                 adapter->netdev->name, i);
1564                         goto err_out;
1565                 }
1566         }
1567         return err;
1568 err_out:
1569         vmxnet3_rq_destroy_all(adapter);
1570         return err;
1571
1572 }
1573
1574 /* Multiple queue aware polling function for tx and rx */
1575
1576 static int
1577 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1578 {
1579         int rcd_done = 0, i;
1580         if (unlikely(adapter->shared->ecr))
1581                 vmxnet3_process_events(adapter);
1582         for (i = 0; i < adapter->num_tx_queues; i++)
1583                 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1584
1585         for (i = 0; i < adapter->num_rx_queues; i++)
1586                 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1587                                                    adapter, budget);
1588         return rcd_done;
1589 }
1590
1591
1592 static int
1593 vmxnet3_poll(struct napi_struct *napi, int budget)
1594 {
1595         struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1596                                           struct vmxnet3_rx_queue, napi);
1597         int rxd_done;
1598
1599         rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1600
1601         if (rxd_done < budget) {
1602                 napi_complete(napi);
1603                 vmxnet3_enable_all_intrs(rx_queue->adapter);
1604         }
1605         return rxd_done;
1606 }
1607
1608 /*
1609  * NAPI polling function for MSI-X mode with multiple Rx queues
1610  * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1611  */
1612
1613 static int
1614 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1615 {
1616         struct vmxnet3_rx_queue *rq = container_of(napi,
1617                                                 struct vmxnet3_rx_queue, napi);
1618         struct vmxnet3_adapter *adapter = rq->adapter;
1619         int rxd_done;
1620
1621         /* When sharing interrupt with corresponding tx queue, process
1622          * tx completions in that queue as well
1623          */
1624         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1625                 struct vmxnet3_tx_queue *tq =
1626                                 &adapter->tx_queue[rq - adapter->rx_queue];
1627                 vmxnet3_tq_tx_complete(tq, adapter);
1628         }
1629
1630         rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1631
1632         if (rxd_done < budget) {
1633                 napi_complete(napi);
1634                 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1635         }
1636         return rxd_done;
1637 }
1638
1639
1640 #ifdef CONFIG_PCI_MSI
1641
1642 /*
1643  * Handle completion interrupts on tx queues
1644  * Returns whether or not the intr is handled
1645  */
1646
1647 static irqreturn_t
1648 vmxnet3_msix_tx(int irq, void *data)
1649 {
1650         struct vmxnet3_tx_queue *tq = data;
1651         struct vmxnet3_adapter *adapter = tq->adapter;
1652
1653         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1654                 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1655
1656         /* Handle the case where only one irq is allocate for all tx queues */
1657         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1658                 int i;
1659                 for (i = 0; i < adapter->num_tx_queues; i++) {
1660                         struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1661                         vmxnet3_tq_tx_complete(txq, adapter);
1662                 }
1663         } else {
1664                 vmxnet3_tq_tx_complete(tq, adapter);
1665         }
1666         vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1667
1668         return IRQ_HANDLED;
1669 }
1670
1671
1672 /*
1673  * Handle completion interrupts on rx queues. Returns whether or not the
1674  * intr is handled
1675  */
1676
1677 static irqreturn_t
1678 vmxnet3_msix_rx(int irq, void *data)
1679 {
1680         struct vmxnet3_rx_queue *rq = data;
1681         struct vmxnet3_adapter *adapter = rq->adapter;
1682
1683         /* disable intr if needed */
1684         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1685                 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1686         napi_schedule(&rq->napi);
1687
1688         return IRQ_HANDLED;
1689 }
1690
1691 /*
1692  *----------------------------------------------------------------------------
1693  *
1694  * vmxnet3_msix_event --
1695  *
1696  *    vmxnet3 msix event intr handler
1697  *
1698  * Result:
1699  *    whether or not the intr is handled
1700  *
1701  *----------------------------------------------------------------------------
1702  */
1703
1704 static irqreturn_t
1705 vmxnet3_msix_event(int irq, void *data)
1706 {
1707         struct net_device *dev = data;
1708         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1709
1710         /* disable intr if needed */
1711         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1712                 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1713
1714         if (adapter->shared->ecr)
1715                 vmxnet3_process_events(adapter);
1716
1717         vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1718
1719         return IRQ_HANDLED;
1720 }
1721
1722 #endif /* CONFIG_PCI_MSI  */
1723
1724
1725 /* Interrupt handler for vmxnet3  */
1726 static irqreturn_t
1727 vmxnet3_intr(int irq, void *dev_id)
1728 {
1729         struct net_device *dev = dev_id;
1730         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1731
1732         if (adapter->intr.type == VMXNET3_IT_INTX) {
1733                 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1734                 if (unlikely(icr == 0))
1735                         /* not ours */
1736                         return IRQ_NONE;
1737         }
1738
1739
1740         /* disable intr if needed */
1741         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1742                 vmxnet3_disable_all_intrs(adapter);
1743
1744         napi_schedule(&adapter->rx_queue[0].napi);
1745
1746         return IRQ_HANDLED;
1747 }
1748
1749 #ifdef CONFIG_NET_POLL_CONTROLLER
1750
1751 /* netpoll callback. */
1752 static void
1753 vmxnet3_netpoll(struct net_device *netdev)
1754 {
1755         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1756
1757         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1758                 vmxnet3_disable_all_intrs(adapter);
1759
1760         vmxnet3_do_poll(adapter, adapter->rx_queue[0].rx_ring[0].size);
1761         vmxnet3_enable_all_intrs(adapter);
1762
1763 }
1764 #endif  /* CONFIG_NET_POLL_CONTROLLER */
1765
1766 static int
1767 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
1768 {
1769         struct vmxnet3_intr *intr = &adapter->intr;
1770         int err = 0, i;
1771         int vector = 0;
1772
1773 #ifdef CONFIG_PCI_MSI
1774         if (adapter->intr.type == VMXNET3_IT_MSIX) {
1775                 for (i = 0; i < adapter->num_tx_queues; i++) {
1776                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1777                                 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
1778                                         adapter->netdev->name, vector);
1779                                 err = request_irq(
1780                                               intr->msix_entries[vector].vector,
1781                                               vmxnet3_msix_tx, 0,
1782                                               adapter->tx_queue[i].name,
1783                                               &adapter->tx_queue[i]);
1784                         } else {
1785                                 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
1786                                         adapter->netdev->name, vector);
1787                         }
1788                         if (err) {
1789                                 dev_err(&adapter->netdev->dev,
1790                                         "Failed to request irq for MSIX, %s, "
1791                                         "error %d\n",
1792                                         adapter->tx_queue[i].name, err);
1793                                 return err;
1794                         }
1795
1796                         /* Handle the case where only 1 MSIx was allocated for
1797                          * all tx queues */
1798                         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1799                                 for (; i < adapter->num_tx_queues; i++)
1800                                         adapter->tx_queue[i].comp_ring.intr_idx
1801                                                                 = vector;
1802                                 vector++;
1803                                 break;
1804                         } else {
1805                                 adapter->tx_queue[i].comp_ring.intr_idx
1806                                                                 = vector++;
1807                         }
1808                 }
1809                 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
1810                         vector = 0;
1811
1812                 for (i = 0; i < adapter->num_rx_queues; i++) {
1813                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
1814                                 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
1815                                         adapter->netdev->name, vector);
1816                         else
1817                                 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
1818                                         adapter->netdev->name, vector);
1819                         err = request_irq(intr->msix_entries[vector].vector,
1820                                           vmxnet3_msix_rx, 0,
1821                                           adapter->rx_queue[i].name,
1822                                           &(adapter->rx_queue[i]));
1823                         if (err) {
1824                                 printk(KERN_ERR "Failed to request irq for MSIX"
1825                                        ", %s, error %d\n",
1826                                        adapter->rx_queue[i].name, err);
1827                                 return err;
1828                         }
1829
1830                         adapter->rx_queue[i].comp_ring.intr_idx = vector++;
1831                 }
1832
1833                 sprintf(intr->event_msi_vector_name, "%s-event-%d",
1834                         adapter->netdev->name, vector);
1835                 err = request_irq(intr->msix_entries[vector].vector,
1836                                   vmxnet3_msix_event, 0,
1837                                   intr->event_msi_vector_name, adapter->netdev);
1838                 intr->event_intr_idx = vector;
1839
1840         } else if (intr->type == VMXNET3_IT_MSI) {
1841                 adapter->num_rx_queues = 1;
1842                 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
1843                                   adapter->netdev->name, adapter->netdev);
1844         } else {
1845 #endif
1846                 adapter->num_rx_queues = 1;
1847                 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
1848                                   IRQF_SHARED, adapter->netdev->name,
1849                                   adapter->netdev);
1850 #ifdef CONFIG_PCI_MSI
1851         }
1852 #endif
1853         intr->num_intrs = vector + 1;
1854         if (err) {
1855                 printk(KERN_ERR "Failed to request irq %s (intr type:%d), error"
1856                        ":%d\n", adapter->netdev->name, intr->type, err);
1857         } else {
1858                 /* Number of rx queues will not change after this */
1859                 for (i = 0; i < adapter->num_rx_queues; i++) {
1860                         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1861                         rq->qid = i;
1862                         rq->qid2 = i + adapter->num_rx_queues;
1863                 }
1864
1865
1866
1867                 /* init our intr settings */
1868                 for (i = 0; i < intr->num_intrs; i++)
1869                         intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
1870                 if (adapter->intr.type != VMXNET3_IT_MSIX) {
1871                         adapter->intr.event_intr_idx = 0;
1872                         for (i = 0; i < adapter->num_tx_queues; i++)
1873                                 adapter->tx_queue[i].comp_ring.intr_idx = 0;
1874                         adapter->rx_queue[0].comp_ring.intr_idx = 0;
1875                 }
1876
1877                 printk(KERN_INFO "%s: intr type %u, mode %u, %u vectors "
1878                        "allocated\n", adapter->netdev->name, intr->type,
1879                        intr->mask_mode, intr->num_intrs);
1880         }
1881
1882         return err;
1883 }
1884
1885
1886 static void
1887 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
1888 {
1889         struct vmxnet3_intr *intr = &adapter->intr;
1890         BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
1891
1892         switch (intr->type) {
1893 #ifdef CONFIG_PCI_MSI
1894         case VMXNET3_IT_MSIX:
1895         {
1896                 int i, vector = 0;
1897
1898                 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
1899                         for (i = 0; i < adapter->num_tx_queues; i++) {
1900                                 free_irq(intr->msix_entries[vector++].vector,
1901                                          &(adapter->tx_queue[i]));
1902                                 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
1903                                         break;
1904                         }
1905                 }
1906
1907                 for (i = 0; i < adapter->num_rx_queues; i++) {
1908                         free_irq(intr->msix_entries[vector++].vector,
1909                                  &(adapter->rx_queue[i]));
1910                 }
1911
1912                 free_irq(intr->msix_entries[vector].vector,
1913                          adapter->netdev);
1914                 BUG_ON(vector >= intr->num_intrs);
1915                 break;
1916         }
1917 #endif
1918         case VMXNET3_IT_MSI:
1919                 free_irq(adapter->pdev->irq, adapter->netdev);
1920                 break;
1921         case VMXNET3_IT_INTX:
1922                 free_irq(adapter->pdev->irq, adapter->netdev);
1923                 break;
1924         default:
1925                 BUG_ON(true);
1926         }
1927 }
1928
1929
1930 static void
1931 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
1932 {
1933         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1934         u16 vid;
1935
1936         /* allow untagged pkts */
1937         VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
1938
1939         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1940                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1941 }
1942
1943
1944 static int
1945 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1946 {
1947         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1948
1949         if (!(netdev->flags & IFF_PROMISC)) {
1950                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1951                 unsigned long flags;
1952
1953                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
1954                 spin_lock_irqsave(&adapter->cmd_lock, flags);
1955                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1956                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1957                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1958         }
1959
1960         set_bit(vid, adapter->active_vlans);
1961
1962         return 0;
1963 }
1964
1965
1966 static int
1967 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1968 {
1969         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1970
1971         if (!(netdev->flags & IFF_PROMISC)) {
1972                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
1973                 unsigned long flags;
1974
1975                 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
1976                 spin_lock_irqsave(&adapter->cmd_lock, flags);
1977                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
1978                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
1979                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
1980         }
1981
1982         clear_bit(vid, adapter->active_vlans);
1983
1984         return 0;
1985 }
1986
1987
1988 static u8 *
1989 vmxnet3_copy_mc(struct net_device *netdev)
1990 {
1991         u8 *buf = NULL;
1992         u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
1993
1994         /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
1995         if (sz <= 0xffff) {
1996                 /* We may be called with BH disabled */
1997                 buf = kmalloc(sz, GFP_ATOMIC);
1998                 if (buf) {
1999                         struct netdev_hw_addr *ha;
2000                         int i = 0;
2001
2002                         netdev_for_each_mc_addr(ha, netdev)
2003                                 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2004                                        ETH_ALEN);
2005                 }
2006         }
2007         return buf;
2008 }
2009
2010
2011 static void
2012 vmxnet3_set_mc(struct net_device *netdev)
2013 {
2014         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2015         unsigned long flags;
2016         struct Vmxnet3_RxFilterConf *rxConf =
2017                                         &adapter->shared->devRead.rxFilterConf;
2018         u8 *new_table = NULL;
2019         u32 new_mode = VMXNET3_RXM_UCAST;
2020
2021         if (netdev->flags & IFF_PROMISC) {
2022                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2023                 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2024
2025                 new_mode |= VMXNET3_RXM_PROMISC;
2026         } else {
2027                 vmxnet3_restore_vlan(adapter);
2028         }
2029
2030         if (netdev->flags & IFF_BROADCAST)
2031                 new_mode |= VMXNET3_RXM_BCAST;
2032
2033         if (netdev->flags & IFF_ALLMULTI)
2034                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2035         else
2036                 if (!netdev_mc_empty(netdev)) {
2037                         new_table = vmxnet3_copy_mc(netdev);
2038                         if (new_table) {
2039                                 new_mode |= VMXNET3_RXM_MCAST;
2040                                 rxConf->mfTableLen = cpu_to_le16(
2041                                         netdev_mc_count(netdev) * ETH_ALEN);
2042                                 rxConf->mfTablePA = cpu_to_le64(virt_to_phys(
2043                                                     new_table));
2044                         } else {
2045                                 printk(KERN_INFO "%s: failed to copy mcast list"
2046                                        ", setting ALL_MULTI\n", netdev->name);
2047                                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2048                         }
2049                 }
2050
2051
2052         if (!(new_mode & VMXNET3_RXM_MCAST)) {
2053                 rxConf->mfTableLen = 0;
2054                 rxConf->mfTablePA = 0;
2055         }
2056
2057         spin_lock_irqsave(&adapter->cmd_lock, flags);
2058         if (new_mode != rxConf->rxMode) {
2059                 rxConf->rxMode = cpu_to_le32(new_mode);
2060                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2061                                        VMXNET3_CMD_UPDATE_RX_MODE);
2062                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2063                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2064         }
2065
2066         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2067                                VMXNET3_CMD_UPDATE_MAC_FILTERS);
2068         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2069
2070         kfree(new_table);
2071 }
2072
2073 void
2074 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2075 {
2076         int i;
2077
2078         for (i = 0; i < adapter->num_rx_queues; i++)
2079                 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2080 }
2081
2082
2083 /*
2084  *   Set up driver_shared based on settings in adapter.
2085  */
2086
2087 static void
2088 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2089 {
2090         struct Vmxnet3_DriverShared *shared = adapter->shared;
2091         struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2092         struct Vmxnet3_TxQueueConf *tqc;
2093         struct Vmxnet3_RxQueueConf *rqc;
2094         int i;
2095
2096         memset(shared, 0, sizeof(*shared));
2097
2098         /* driver settings */
2099         shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2100         devRead->misc.driverInfo.version = cpu_to_le32(
2101                                                 VMXNET3_DRIVER_VERSION_NUM);
2102         devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2103                                 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2104         devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2105         *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2106                                 *((u32 *)&devRead->misc.driverInfo.gos));
2107         devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2108         devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2109
2110         devRead->misc.ddPA = cpu_to_le64(virt_to_phys(adapter));
2111         devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2112
2113         /* set up feature flags */
2114         if (adapter->netdev->features & NETIF_F_RXCSUM)
2115                 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2116
2117         if (adapter->netdev->features & NETIF_F_LRO) {
2118                 devRead->misc.uptFeatures |= UPT1_F_LRO;
2119                 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2120         }
2121         if (adapter->netdev->features & NETIF_F_HW_VLAN_RX)
2122                 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2123
2124         devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2125         devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2126         devRead->misc.queueDescLen = cpu_to_le32(
2127                 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2128                 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2129
2130         /* tx queue settings */
2131         devRead->misc.numTxQueues =  adapter->num_tx_queues;
2132         for (i = 0; i < adapter->num_tx_queues; i++) {
2133                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2134                 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2135                 tqc = &adapter->tqd_start[i].conf;
2136                 tqc->txRingBasePA   = cpu_to_le64(tq->tx_ring.basePA);
2137                 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2138                 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2139                 tqc->ddPA           = cpu_to_le64(virt_to_phys(tq->buf_info));
2140                 tqc->txRingSize     = cpu_to_le32(tq->tx_ring.size);
2141                 tqc->dataRingSize   = cpu_to_le32(tq->data_ring.size);
2142                 tqc->compRingSize   = cpu_to_le32(tq->comp_ring.size);
2143                 tqc->ddLen          = cpu_to_le32(
2144                                         sizeof(struct vmxnet3_tx_buf_info) *
2145                                         tqc->txRingSize);
2146                 tqc->intrIdx        = tq->comp_ring.intr_idx;
2147         }
2148
2149         /* rx queue settings */
2150         devRead->misc.numRxQueues = adapter->num_rx_queues;
2151         for (i = 0; i < adapter->num_rx_queues; i++) {
2152                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2153                 rqc = &adapter->rqd_start[i].conf;
2154                 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2155                 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2156                 rqc->compRingBasePA  = cpu_to_le64(rq->comp_ring.basePA);
2157                 rqc->ddPA            = cpu_to_le64(virt_to_phys(
2158                                                         rq->buf_info));
2159                 rqc->rxRingSize[0]   = cpu_to_le32(rq->rx_ring[0].size);
2160                 rqc->rxRingSize[1]   = cpu_to_le32(rq->rx_ring[1].size);
2161                 rqc->compRingSize    = cpu_to_le32(rq->comp_ring.size);
2162                 rqc->ddLen           = cpu_to_le32(
2163                                         sizeof(struct vmxnet3_rx_buf_info) *
2164                                         (rqc->rxRingSize[0] +
2165                                          rqc->rxRingSize[1]));
2166                 rqc->intrIdx         = rq->comp_ring.intr_idx;
2167         }
2168
2169 #ifdef VMXNET3_RSS
2170         memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2171
2172         if (adapter->rss) {
2173                 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2174                 devRead->misc.uptFeatures |= UPT1_F_RSS;
2175                 devRead->misc.numRxQueues = adapter->num_rx_queues;
2176                 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2177                                     UPT1_RSS_HASH_TYPE_IPV4 |
2178                                     UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2179                                     UPT1_RSS_HASH_TYPE_IPV6;
2180                 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2181                 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2182                 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2183                 get_random_bytes(&rssConf->hashKey[0], rssConf->hashKeySize);
2184                 for (i = 0; i < rssConf->indTableSize; i++)
2185                         rssConf->indTable[i] = ethtool_rxfh_indir_default(
2186                                 i, adapter->num_rx_queues);
2187
2188                 devRead->rssConfDesc.confVer = 1;
2189                 devRead->rssConfDesc.confLen = sizeof(*rssConf);
2190                 devRead->rssConfDesc.confPA  = virt_to_phys(rssConf);
2191         }
2192
2193 #endif /* VMXNET3_RSS */
2194
2195         /* intr settings */
2196         devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2197                                      VMXNET3_IMM_AUTO;
2198         devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2199         for (i = 0; i < adapter->intr.num_intrs; i++)
2200                 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2201
2202         devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2203         devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2204
2205         /* rx filter settings */
2206         devRead->rxFilterConf.rxMode = 0;
2207         vmxnet3_restore_vlan(adapter);
2208         vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2209
2210         /* the rest are already zeroed */
2211 }
2212
2213
2214 int
2215 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2216 {
2217         int err, i;
2218         u32 ret;
2219         unsigned long flags;
2220
2221         dev_dbg(&adapter->netdev->dev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2222                 " ring sizes %u %u %u\n", adapter->netdev->name,
2223                 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2224                 adapter->tx_queue[0].tx_ring.size,
2225                 adapter->rx_queue[0].rx_ring[0].size,
2226                 adapter->rx_queue[0].rx_ring[1].size);
2227
2228         vmxnet3_tq_init_all(adapter);
2229         err = vmxnet3_rq_init_all(adapter);
2230         if (err) {
2231                 printk(KERN_ERR "Failed to init rx queue for %s: error %d\n",
2232                        adapter->netdev->name, err);
2233                 goto rq_err;
2234         }
2235
2236         err = vmxnet3_request_irqs(adapter);
2237         if (err) {
2238                 printk(KERN_ERR "Failed to setup irq for %s: error %d\n",
2239                        adapter->netdev->name, err);
2240                 goto irq_err;
2241         }
2242
2243         vmxnet3_setup_driver_shared(adapter);
2244
2245         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2246                                adapter->shared_pa));
2247         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2248                                adapter->shared_pa));
2249         spin_lock_irqsave(&adapter->cmd_lock, flags);
2250         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2251                                VMXNET3_CMD_ACTIVATE_DEV);
2252         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2253         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2254
2255         if (ret != 0) {
2256                 printk(KERN_ERR "Failed to activate dev %s: error %u\n",
2257                        adapter->netdev->name, ret);
2258                 err = -EINVAL;
2259                 goto activate_err;
2260         }
2261
2262         for (i = 0; i < adapter->num_rx_queues; i++) {
2263                 VMXNET3_WRITE_BAR0_REG(adapter,
2264                                 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2265                                 adapter->rx_queue[i].rx_ring[0].next2fill);
2266                 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2267                                 (i * VMXNET3_REG_ALIGN)),
2268                                 adapter->rx_queue[i].rx_ring[1].next2fill);
2269         }
2270
2271         /* Apply the rx filter settins last. */
2272         vmxnet3_set_mc(adapter->netdev);
2273
2274         /*
2275          * Check link state when first activating device. It will start the
2276          * tx queue if the link is up.
2277          */
2278         vmxnet3_check_link(adapter, true);
2279         for (i = 0; i < adapter->num_rx_queues; i++)
2280                 napi_enable(&adapter->rx_queue[i].napi);
2281         vmxnet3_enable_all_intrs(adapter);
2282         clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2283         return 0;
2284
2285 activate_err:
2286         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2287         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2288         vmxnet3_free_irqs(adapter);
2289 irq_err:
2290 rq_err:
2291         /* free up buffers we allocated */
2292         vmxnet3_rq_cleanup_all(adapter);
2293         return err;
2294 }
2295
2296
2297 void
2298 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2299 {
2300         unsigned long flags;
2301         spin_lock_irqsave(&adapter->cmd_lock, flags);
2302         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2303         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2304 }
2305
2306
2307 int
2308 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2309 {
2310         int i;
2311         unsigned long flags;
2312         if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2313                 return 0;
2314
2315
2316         spin_lock_irqsave(&adapter->cmd_lock, flags);
2317         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2318                                VMXNET3_CMD_QUIESCE_DEV);
2319         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2320         vmxnet3_disable_all_intrs(adapter);
2321
2322         for (i = 0; i < adapter->num_rx_queues; i++)
2323                 napi_disable(&adapter->rx_queue[i].napi);
2324         netif_tx_disable(adapter->netdev);
2325         adapter->link_speed = 0;
2326         netif_carrier_off(adapter->netdev);
2327
2328         vmxnet3_tq_cleanup_all(adapter);
2329         vmxnet3_rq_cleanup_all(adapter);
2330         vmxnet3_free_irqs(adapter);
2331         return 0;
2332 }
2333
2334
2335 static void
2336 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2337 {
2338         u32 tmp;
2339
2340         tmp = *(u32 *)mac;
2341         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2342
2343         tmp = (mac[5] << 8) | mac[4];
2344         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2345 }
2346
2347
2348 static int
2349 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2350 {
2351         struct sockaddr *addr = p;
2352         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2353
2354         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2355         vmxnet3_write_mac_addr(adapter, addr->sa_data);
2356
2357         return 0;
2358 }
2359
2360
2361 /* ==================== initialization and cleanup routines ============ */
2362
2363 static int
2364 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2365 {
2366         int err;
2367         unsigned long mmio_start, mmio_len;
2368         struct pci_dev *pdev = adapter->pdev;
2369
2370         err = pci_enable_device(pdev);
2371         if (err) {
2372                 printk(KERN_ERR "Failed to enable adapter %s: error %d\n",
2373                        pci_name(pdev), err);
2374                 return err;
2375         }
2376
2377         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2378                 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2379                         printk(KERN_ERR "pci_set_consistent_dma_mask failed "
2380                                "for adapter %s\n", pci_name(pdev));
2381                         err = -EIO;
2382                         goto err_set_mask;
2383                 }
2384                 *dma64 = true;
2385         } else {
2386                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2387                         printk(KERN_ERR "pci_set_dma_mask failed for adapter "
2388                                "%s\n",  pci_name(pdev));
2389                         err = -EIO;
2390                         goto err_set_mask;
2391                 }
2392                 *dma64 = false;
2393         }
2394
2395         err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2396                                            vmxnet3_driver_name);
2397         if (err) {
2398                 printk(KERN_ERR "Failed to request region for adapter %s: "
2399                        "error %d\n", pci_name(pdev), err);
2400                 goto err_set_mask;
2401         }
2402
2403         pci_set_master(pdev);
2404
2405         mmio_start = pci_resource_start(pdev, 0);
2406         mmio_len = pci_resource_len(pdev, 0);
2407         adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2408         if (!adapter->hw_addr0) {
2409                 printk(KERN_ERR "Failed to map bar0 for adapter %s\n",
2410                        pci_name(pdev));
2411                 err = -EIO;
2412                 goto err_ioremap;
2413         }
2414
2415         mmio_start = pci_resource_start(pdev, 1);
2416         mmio_len = pci_resource_len(pdev, 1);
2417         adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2418         if (!adapter->hw_addr1) {
2419                 printk(KERN_ERR "Failed to map bar1 for adapter %s\n",
2420                        pci_name(pdev));
2421                 err = -EIO;
2422                 goto err_bar1;
2423         }
2424         return 0;
2425
2426 err_bar1:
2427         iounmap(adapter->hw_addr0);
2428 err_ioremap:
2429         pci_release_selected_regions(pdev, (1 << 2) - 1);
2430 err_set_mask:
2431         pci_disable_device(pdev);
2432         return err;
2433 }
2434
2435
2436 static void
2437 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2438 {
2439         BUG_ON(!adapter->pdev);
2440
2441         iounmap(adapter->hw_addr0);
2442         iounmap(adapter->hw_addr1);
2443         pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2444         pci_disable_device(adapter->pdev);
2445 }
2446
2447
2448 static void
2449 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2450 {
2451         size_t sz, i, ring0_size, ring1_size, comp_size;
2452         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2453
2454
2455         if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2456                                     VMXNET3_MAX_ETH_HDR_SIZE) {
2457                 adapter->skb_buf_size = adapter->netdev->mtu +
2458                                         VMXNET3_MAX_ETH_HDR_SIZE;
2459                 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2460                         adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2461
2462                 adapter->rx_buf_per_pkt = 1;
2463         } else {
2464                 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2465                 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2466                                             VMXNET3_MAX_ETH_HDR_SIZE;
2467                 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2468         }
2469
2470         /*
2471          * for simplicity, force the ring0 size to be a multiple of
2472          * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2473          */
2474         sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2475         ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2476         ring0_size = (ring0_size + sz - 1) / sz * sz;
2477         ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2478                            sz * sz);
2479         ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2480         comp_size = ring0_size + ring1_size;
2481
2482         for (i = 0; i < adapter->num_rx_queues; i++) {
2483                 rq = &adapter->rx_queue[i];
2484                 rq->rx_ring[0].size = ring0_size;
2485                 rq->rx_ring[1].size = ring1_size;
2486                 rq->comp_ring.size = comp_size;
2487         }
2488 }
2489
2490
2491 int
2492 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2493                       u32 rx_ring_size, u32 rx_ring2_size)
2494 {
2495         int err = 0, i;
2496
2497         for (i = 0; i < adapter->num_tx_queues; i++) {
2498                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2499                 tq->tx_ring.size   = tx_ring_size;
2500                 tq->data_ring.size = tx_ring_size;
2501                 tq->comp_ring.size = tx_ring_size;
2502                 tq->shared = &adapter->tqd_start[i].ctrl;
2503                 tq->stopped = true;
2504                 tq->adapter = adapter;
2505                 tq->qid = i;
2506                 err = vmxnet3_tq_create(tq, adapter);
2507                 /*
2508                  * Too late to change num_tx_queues. We cannot do away with
2509                  * lesser number of queues than what we asked for
2510                  */
2511                 if (err)
2512                         goto queue_err;
2513         }
2514
2515         adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2516         adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2517         vmxnet3_adjust_rx_ring_size(adapter);
2518         for (i = 0; i < adapter->num_rx_queues; i++) {
2519                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2520                 /* qid and qid2 for rx queues will be assigned later when num
2521                  * of rx queues is finalized after allocating intrs */
2522                 rq->shared = &adapter->rqd_start[i].ctrl;
2523                 rq->adapter = adapter;
2524                 err = vmxnet3_rq_create(rq, adapter);
2525                 if (err) {
2526                         if (i == 0) {
2527                                 printk(KERN_ERR "Could not allocate any rx"
2528                                        "queues. Aborting.\n");
2529                                 goto queue_err;
2530                         } else {
2531                                 printk(KERN_INFO "Number of rx queues changed "
2532                                        "to : %d.\n", i);
2533                                 adapter->num_rx_queues = i;
2534                                 err = 0;
2535                                 break;
2536                         }
2537                 }
2538         }
2539         return err;