Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/net/vmxnet3/vmxnet3_drv.c

  1 /*
  2  * Linux driver for VMware's vmxnet3 ethernet NIC.
  3  *
  4  * Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
  5  *
  6  * This program is free software; you can redistribute it and/or modify it
  7  * under the terms of the GNU General Public License as published by the
  8  * Free Software Foundation; version 2 of the License and no later version.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 13  * NON INFRINGEMENT. See the GNU General Public License for more
 14  * details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program; if not, write to the Free Software
 18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * The full GNU General Public License is included in this distribution in
 21  * the file called "COPYING".
 22  *
 23  * Maintained by: pv-drivers@vmware.com
 24  *
 25  */
 26 
 27 #include <linux/module.h>
 28 #include <net/ip6_checksum.h>
 29 
 30 #include "vmxnet3_int.h"
 31 
 32 char vmxnet3_driver_name[] = "vmxnet3";
 33 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
 34 
 35 /*
 36  * PCI Device ID Table
 37  * Last entry must be all 0s
 38  */
 39 static const struct pci_device_id vmxnet3_pciid_table[] = {
 40         {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
 41         {0}
 42 };
 43 
 44 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
 45 
 46 static int enable_mq = 1;
 47 
 48 static void
 49 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac);
 50 
 51 /*
 52  *    Enable/Disable the given intr
 53  */
 54 static void
 55 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
 56 {
 57         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
 58 }
 59 
 60 
 61 static void
 62 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
 63 {
 64         VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
 65 }
 66 
 67 
 68 /*
 69  *    Enable/Disable all intrs used by the device
 70  */
 71 static void
 72 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
 73 {
 74         int i;
 75 
 76         for (i = 0; i < adapter->intr.num_intrs; i++)
 77                 vmxnet3_enable_intr(adapter, i);
 78         adapter->shared->devRead.intrConf.intrCtrl &=
 79                                         cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
 80 }
 81 
 82 
 83 static void
 84 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
 85 {
 86         int i;
 87 
 88         adapter->shared->devRead.intrConf.intrCtrl |=
 89                                         cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
 90         for (i = 0; i < adapter->intr.num_intrs; i++)
 91                 vmxnet3_disable_intr(adapter, i);
 92 }
 93 
 94 
 95 static void
 96 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
 97 {
 98         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
 99 }
100 
101 
102 static bool
103 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
104 {
105         return tq->stopped;
106 }
107 
108 
109 static void
110 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
111 {
112         tq->stopped = false;
113         netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
114 }
115 
116 
117 static void
118 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
119 {
120         tq->stopped = false;
121         netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
122 }
123 
124 
125 static void
126 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
127 {
128         tq->stopped = true;
129         tq->num_stop++;
130         netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
131 }
132 
133 
134 /*
135  * Check the link state. This may start or stop the tx queue.
136  */
137 static void
138 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
139 {
140         u32 ret;
141         int i;
142         unsigned long flags;
143 
144         spin_lock_irqsave(&adapter->cmd_lock, flags);
145         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
146         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
147         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
148 
149         adapter->link_speed = ret >> 16;
150         if (ret & 1) { /* Link is up. */
151                 netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
152                             adapter->link_speed);
153                 netif_carrier_on(adapter->netdev);
154 
155                 if (affectTxQueue) {
156                         for (i = 0; i < adapter->num_tx_queues; i++)
157                                 vmxnet3_tq_start(&adapter->tx_queue[i],
158                                                  adapter);
159                 }
160         } else {
161                 netdev_info(adapter->netdev, "NIC Link is Down\n");
162                 netif_carrier_off(adapter->netdev);
163 
164                 if (affectTxQueue) {
165                         for (i = 0; i < adapter->num_tx_queues; i++)
166                                 vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
167                 }
168         }
169 }
170 
171 static void
172 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
173 {
174         int i;
175         unsigned long flags;
176         u32 events = le32_to_cpu(adapter->shared->ecr);
177         if (!events)
178                 return;
179 
180         vmxnet3_ack_events(adapter, events);
181 
182         /* Check if link state has changed */
183         if (events & VMXNET3_ECR_LINK)
184                 vmxnet3_check_link(adapter, true);
185 
186         /* Check if there is an error on xmit/recv queues */
187         if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
188                 spin_lock_irqsave(&adapter->cmd_lock, flags);
189                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
190                                        VMXNET3_CMD_GET_QUEUE_STATUS);
191                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
192 
193                 for (i = 0; i < adapter->num_tx_queues; i++)
194                         if (adapter->tqd_start[i].status.stopped)
195                                 dev_err(&adapter->netdev->dev,
196                                         "%s: tq[%d] error 0x%x\n",
197                                         adapter->netdev->name, i, le32_to_cpu(
198                                         adapter->tqd_start[i].status.error));
199                 for (i = 0; i < adapter->num_rx_queues; i++)
200                         if (adapter->rqd_start[i].status.stopped)
201                                 dev_err(&adapter->netdev->dev,
202                                         "%s: rq[%d] error 0x%x\n",
203                                         adapter->netdev->name, i,
204                                         adapter->rqd_start[i].status.error);
205 
206                 schedule_work(&adapter->work);
207         }
208 }
209 
210 #ifdef __BIG_ENDIAN_BITFIELD
211 /*
212  * The device expects the bitfields in shared structures to be written in
213  * little endian. When CPU is big endian, the following routines are used to
214  * correctly read and write into ABI.
215  * The general technique used here is : double word bitfields are defined in
216  * opposite order for big endian architecture. Then before reading them in
217  * driver the complete double word is translated using le32_to_cpu. Similarly
218  * After the driver writes into bitfields, cpu_to_le32 is used to translate the
219  * double words into required format.
220  * In order to avoid touching bits in shared structure more than once, temporary
221  * descriptors are used. These are passed as srcDesc to following functions.
222  */
223 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
224                                 struct Vmxnet3_RxDesc *dstDesc)
225 {
226         u32 *src = (u32 *)srcDesc + 2;
227         u32 *dst = (u32 *)dstDesc + 2;
228         dstDesc->addr = le64_to_cpu(srcDesc->addr);
229         *dst = le32_to_cpu(*src);
230         dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
231 }
232 
233 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
234                                struct Vmxnet3_TxDesc *dstDesc)
235 {
236         int i;
237         u32 *src = (u32 *)(srcDesc + 1);
238         u32 *dst = (u32 *)(dstDesc + 1);
239 
240         /* Working backwards so that the gen bit is set at the end. */
241         for (i = 2; i > 0; i--) {
242                 src--;
243                 dst--;
244                 *dst = cpu_to_le32(*src);
245         }
246 }
247 
248 
249 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
250                                 struct Vmxnet3_RxCompDesc *dstDesc)
251 {
252         int i = 0;
253         u32 *src = (u32 *)srcDesc;
254         u32 *dst = (u32 *)dstDesc;
255         for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
256                 *dst = le32_to_cpu(*src);
257                 src++;
258                 dst++;
259         }
260 }
261 
262 
263 /* Used to read bitfield values from double words. */
264 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
265 {
266         u32 temp = le32_to_cpu(*bitfield);
267         u32 mask = ((1 << size) - 1) << pos;
268         temp &= mask;
269         temp >>= pos;
270         return temp;
271 }
272 
273 
274 
275 #endif  /* __BIG_ENDIAN_BITFIELD */
276 
277 #ifdef __BIG_ENDIAN_BITFIELD
278 
279 #   define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
280                         txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
281                         VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
282 #   define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
283                         txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
284                         VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
285 #   define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
286                         VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
287                         VMXNET3_TCD_GEN_SIZE)
288 #   define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
289                         VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
290 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
291                         (dstrcd) = (tmp); \
292                         vmxnet3_RxCompToCPU((rcd), (tmp)); \
293                 } while (0)
294 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
295                         (dstrxd) = (tmp); \
296                         vmxnet3_RxDescToCPU((rxd), (tmp)); \
297                 } while (0)
298 
299 #else
300 
301 #   define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
302 #   define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
303 #   define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
304 #   define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
305 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
306 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
307 
308 #endif /* __BIG_ENDIAN_BITFIELD  */
309 
310 
311 static void
312 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
313                      struct pci_dev *pdev)
314 {
315         if (tbi->map_type == VMXNET3_MAP_SINGLE)
316                 dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len,
317                                  PCI_DMA_TODEVICE);
318         else if (tbi->map_type == VMXNET3_MAP_PAGE)
319                 dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len,
320                                PCI_DMA_TODEVICE);
321         else
322                 BUG_ON(tbi->map_type != VMXNET3_MAP_NONE);
323 
324         tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
325 }
326 
327 
328 static int
329 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
330                   struct pci_dev *pdev, struct vmxnet3_adapter *adapter)
331 {
332         struct sk_buff *skb;
333         int entries = 0;
334 
335         /* no out of order completion */
336         BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
337         BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
338 
339         skb = tq->buf_info[eop_idx].skb;
340         BUG_ON(skb == NULL);
341         tq->buf_info[eop_idx].skb = NULL;
342 
343         VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
344 
345         while (tq->tx_ring.next2comp != eop_idx) {
346                 vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
347                                      pdev);
348 
349                 /* update next2comp w/o tx_lock. Since we are marking more,
350                  * instead of less, tx ring entries avail, the worst case is
351                  * that the tx routine incorrectly re-queues a pkt due to
352                  * insufficient tx ring entries.
353                  */
354                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
355                 entries++;
356         }
357 
358         dev_kfree_skb_any(skb);
359         return entries;
360 }
361 
362 
363 static int
364 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
365                         struct vmxnet3_adapter *adapter)
366 {
367         int completed = 0;
368         union Vmxnet3_GenericDesc *gdesc;
369 
370         gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
371         while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
372                 completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
373                                                &gdesc->tcd), tq, adapter->pdev,
374                                                adapter);
375 
376                 vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
377                 gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
378         }
379 
380         if (completed) {
381                 spin_lock(&tq->tx_lock);
382                 if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
383                              vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
384                              VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
385                              netif_carrier_ok(adapter->netdev))) {
386                         vmxnet3_tq_wake(tq, adapter);
387                 }
388                 spin_unlock(&tq->tx_lock);
389         }
390         return completed;
391 }
392 
393 
394 static void
395 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
396                    struct vmxnet3_adapter *adapter)
397 {
398         int i;
399 
400         while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
401                 struct vmxnet3_tx_buf_info *tbi;
402 
403                 tbi = tq->buf_info + tq->tx_ring.next2comp;
404 
405                 vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
406                 if (tbi->skb) {
407                         dev_kfree_skb_any(tbi->skb);
408                         tbi->skb = NULL;
409                 }
410                 vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
411         }
412 
413         /* sanity check, verify all buffers are indeed unmapped and freed */
414         for (i = 0; i < tq->tx_ring.size; i++) {
415                 BUG_ON(tq->buf_info[i].skb != NULL ||
416                        tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
417         }
418 
419         tq->tx_ring.gen = VMXNET3_INIT_GEN;
420         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
421 
422         tq->comp_ring.gen = VMXNET3_INIT_GEN;
423         tq->comp_ring.next2proc = 0;
424 }
425 
426 
427 static void
428 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
429                    struct vmxnet3_adapter *adapter)
430 {
431         if (tq->tx_ring.base) {
432                 dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size *
433                                   sizeof(struct Vmxnet3_TxDesc),
434                                   tq->tx_ring.base, tq->tx_ring.basePA);
435                 tq->tx_ring.base = NULL;
436         }
437         if (tq->data_ring.base) {
438                 dma_free_coherent(&adapter->pdev->dev,
439                                   tq->data_ring.size * tq->txdata_desc_size,
440                                   tq->data_ring.base, tq->data_ring.basePA);
441                 tq->data_ring.base = NULL;
442         }
443         if (tq->comp_ring.base) {
444                 dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size *
445                                   sizeof(struct Vmxnet3_TxCompDesc),
446                                   tq->comp_ring.base, tq->comp_ring.basePA);
447                 tq->comp_ring.base = NULL;
448         }
449         if (tq->buf_info) {
450                 dma_free_coherent(&adapter->pdev->dev,
451                                   tq->tx_ring.size * sizeof(tq->buf_info[0]),
452                                   tq->buf_info, tq->buf_info_pa);
453                 tq->buf_info = NULL;
454         }
455 }
456 
457 
458 /* Destroy all tx queues */
459 void
460 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
461 {
462         int i;
463 
464         for (i = 0; i < adapter->num_tx_queues; i++)
465                 vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
466 }
467 
468 
469 static void
470 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
471                 struct vmxnet3_adapter *adapter)
472 {
473         int i;
474 
475         /* reset the tx ring contents to 0 and reset the tx ring states */
476         memset(tq->tx_ring.base, 0, tq->tx_ring.size *
477                sizeof(struct Vmxnet3_TxDesc));
478         tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
479         tq->tx_ring.gen = VMXNET3_INIT_GEN;
480 
481         memset(tq->data_ring.base, 0,
482                tq->data_ring.size * tq->txdata_desc_size);
483 
484         /* reset the tx comp ring contents to 0 and reset comp ring states */
485         memset(tq->comp_ring.base, 0, tq->comp_ring.size *
486                sizeof(struct Vmxnet3_TxCompDesc));
487         tq->comp_ring.next2proc = 0;
488         tq->comp_ring.gen = VMXNET3_INIT_GEN;
489 
490         /* reset the bookkeeping data */
491         memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
492         for (i = 0; i < tq->tx_ring.size; i++)
493                 tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
494 
495         /* stats are not reset */
496 }
497 
498 
499 static int
500 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
501                   struct vmxnet3_adapter *adapter)
502 {
503         size_t sz;
504 
505         BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
506                tq->comp_ring.base || tq->buf_info);
507 
508         tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
509                         tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc),
510                         &tq->tx_ring.basePA, GFP_KERNEL);
511         if (!tq->tx_ring.base) {
512                 netdev_err(adapter->netdev, "failed to allocate tx ring\n");
513                 goto err;
514         }
515 
516         tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
517                         tq->data_ring.size * tq->txdata_desc_size,
518                         &tq->data_ring.basePA, GFP_KERNEL);
519         if (!tq->data_ring.base) {
520                 netdev_err(adapter->netdev, "failed to allocate tx data ring\n");
521                 goto err;
522         }
523 
524         tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
525                         tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
526                         &tq->comp_ring.basePA, GFP_KERNEL);
527         if (!tq->comp_ring.base) {
528                 netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
529                 goto err;
530         }
531 
532         sz = tq->tx_ring.size * sizeof(tq->buf_info[0]);
533         tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz,
534                                            &tq->buf_info_pa, GFP_KERNEL);
535         if (!tq->buf_info)
536                 goto err;
537 
538         return 0;
539 
540 err:
541         vmxnet3_tq_destroy(tq, adapter);
542         return -ENOMEM;
543 }
544 
545 static void
546 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
547 {
548         int i;
549 
550         for (i = 0; i < adapter->num_tx_queues; i++)
551                 vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
552 }
553 
554 /*
555  *    starting from ring->next2fill, allocate rx buffers for the given ring
556  *    of the rx queue and update the rx desc. stop after @num_to_alloc buffers
557  *    are allocated or allocation fails
558  */
559 
560 static int
561 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
562                         int num_to_alloc, struct vmxnet3_adapter *adapter)
563 {
564         int num_allocated = 0;
565         struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
566         struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
567         u32 val;
568 
569         while (num_allocated <= num_to_alloc) {
570                 struct vmxnet3_rx_buf_info *rbi;
571                 union Vmxnet3_GenericDesc *gd;
572 
573                 rbi = rbi_base + ring->next2fill;
574                 gd = ring->base + ring->next2fill;
575 
576                 if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
577                         if (rbi->skb == NULL) {
578                                 rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
579                                                                        rbi->len,
580                                                                        GFP_KERNEL);
581                                 if (unlikely(rbi->skb == NULL)) {
582                                         rq->stats.rx_buf_alloc_failure++;
583                                         break;
584                                 }
585 
586                                 rbi->dma_addr = dma_map_single(
587                                                 &adapter->pdev->dev,
588                                                 rbi->skb->data, rbi->len,
589                                                 PCI_DMA_FROMDEVICE);
590                                 if (dma_mapping_error(&adapter->pdev->dev,
591                                                       rbi->dma_addr)) {
592                                         dev_kfree_skb_any(rbi->skb);
593                                         rq->stats.rx_buf_alloc_failure++;
594                                         break;
595                                 }
596                         } else {
597                                 /* rx buffer skipped by the device */
598                         }
599                         val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
600                 } else {
601                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
602                                rbi->len  != PAGE_SIZE);
603 
604                         if (rbi->page == NULL) {
605                                 rbi->page = alloc_page(GFP_ATOMIC);
606                                 if (unlikely(rbi->page == NULL)) {
607                                         rq->stats.rx_buf_alloc_failure++;
608                                         break;
609                                 }
610                                 rbi->dma_addr = dma_map_page(
611                                                 &adapter->pdev->dev,
612                                                 rbi->page, 0, PAGE_SIZE,
613                                                 PCI_DMA_FROMDEVICE);
614                                 if (dma_mapping_error(&adapter->pdev->dev,
615                                                       rbi->dma_addr)) {
616                                         put_page(rbi->page);
617                                         rq->stats.rx_buf_alloc_failure++;
618                                         break;
619                                 }
620                         } else {
621                                 /* rx buffers skipped by the device */
622                         }
623                         val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
624                 }
625 
626                 gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
627                 gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
628                                            | val | rbi->len);
629 
630                 /* Fill the last buffer but dont mark it ready, or else the
631                  * device will think that the queue is full */
632                 if (num_allocated == num_to_alloc)
633                         break;
634 
635                 gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
636                 num_allocated++;
637                 vmxnet3_cmd_ring_adv_next2fill(ring);
638         }
639 
640         netdev_dbg(adapter->netdev,
641                 "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
642                 num_allocated, ring->next2fill, ring->next2comp);
643 
644         /* so that the device can distinguish a full ring and an empty ring */
645         BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
646 
647         return num_allocated;
648 }
649 
650 
651 static void
652 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
653                     struct vmxnet3_rx_buf_info *rbi)
654 {
655         struct skb_frag_struct *frag = skb_shinfo(skb)->frags +
656                 skb_shinfo(skb)->nr_frags;
657 
658         BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
659 
660         __skb_frag_set_page(frag, rbi->page);
661         frag->page_offset = 0;
662         skb_frag_size_set(frag, rcd->len);
663         skb->data_len += rcd->len;
664         skb->truesize += PAGE_SIZE;
665         skb_shinfo(skb)->nr_frags++;
666 }
667 
668 
669 static int
670 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
671                 struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
672                 struct vmxnet3_adapter *adapter)
673 {
674         u32 dw2, len;
675         unsigned long buf_offset;
676         int i;
677         union Vmxnet3_GenericDesc *gdesc;
678         struct vmxnet3_tx_buf_info *tbi = NULL;
679 
680         BUG_ON(ctx->copy_size > skb_headlen(skb));
681 
682         /* use the previous gen bit for the SOP desc */
683         dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
684 
685         ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
686         gdesc = ctx->sop_txd; /* both loops below can be skipped */
687 
688         /* no need to map the buffer if headers are copied */
689         if (ctx->copy_size) {
690                 ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
691                                         tq->tx_ring.next2fill *
692                                         tq->txdata_desc_size);
693                 ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
694                 ctx->sop_txd->dword[3] = 0;
695 
696                 tbi = tq->buf_info + tq->tx_ring.next2fill;
697                 tbi->map_type = VMXNET3_MAP_NONE;
698 
699                 netdev_dbg(adapter->netdev,
700                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
701                         tq->tx_ring.next2fill,
702                         le64_to_cpu(ctx->sop_txd->txd.addr),
703                         ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
704                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
705 
706                 /* use the right gen for non-SOP desc */
707                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
708         }
709 
710         /* linear part can use multiple tx desc if it's big */
711         len = skb_headlen(skb) - ctx->copy_size;
712         buf_offset = ctx->copy_size;
713         while (len) {
714                 u32 buf_size;
715 
716                 if (len < VMXNET3_MAX_TX_BUF_SIZE) {
717                         buf_size = len;
718                         dw2 |= len;
719                 } else {
720                         buf_size = VMXNET3_MAX_TX_BUF_SIZE;
721                         /* spec says that for TxDesc.len, 0 == 2^14 */
722                 }
723 
724                 tbi = tq->buf_info + tq->tx_ring.next2fill;
725                 tbi->map_type = VMXNET3_MAP_SINGLE;
726                 tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
727                                 skb->data + buf_offset, buf_size,
728                                 PCI_DMA_TODEVICE);
729                 if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
730                         return -EFAULT;
731 
732                 tbi->len = buf_size;
733 
734                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
735                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
736 
737                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
738                 gdesc->dword[2] = cpu_to_le32(dw2);
739                 gdesc->dword[3] = 0;
740 
741                 netdev_dbg(adapter->netdev,
742                         "txd[%u]: 0x%Lx 0x%x 0x%x\n",
743                         tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
744                         le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
745                 vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
746                 dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
747 
748                 len -= buf_size;
749                 buf_offset += buf_size;
750         }
751 
752         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
753                 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
754                 u32 buf_size;
755 
756                 buf_offset = 0;
757                 len = skb_frag_size(frag);
758                 while (len) {
759                         tbi = tq->buf_info + tq->tx_ring.next2fill;
760                         if (len < VMXNET3_MAX_TX_BUF_SIZE) {
761                                 buf_size = len;
762                                 dw2 |= len;
763                         } else {
764                                 buf_size = VMXNET3_MAX_TX_BUF_SIZE;
765                                 /* spec says that for TxDesc.len, 0 == 2^14 */
766                         }
767                         tbi->map_type = VMXNET3_MAP_PAGE;
768                         tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
769                                                          buf_offset, buf_size,
770                                                          DMA_TO_DEVICE);
771                         if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
772                                 return -EFAULT;
773 
774                         tbi->len = buf_size;
775 
776                         gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
777                         BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
778 
779                         gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
780                         gdesc->dword[2] = cpu_to_le32(dw2);
781                         gdesc->dword[3] = 0;
782 
783                         netdev_dbg(adapter->netdev,
784                                 "txd[%u]: 0x%llx %u %u\n",
785                                 tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
786                                 le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
787                         vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
788                         dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
789 
790                         len -= buf_size;
791                         buf_offset += buf_size;
792                 }
793         }
794 
795         ctx->eop_txd = gdesc;
796 
797         /* set the last buf_info for the pkt */
798         tbi->skb = skb;
799         tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
800 
801         return 0;
802 }
803 
804 
805 /* Init all tx queues */
806 static void
807 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
808 {
809         int i;
810 
811         for (i = 0; i < adapter->num_tx_queues; i++)
812                 vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
813 }
814 
815 
816 /*
817  *    parse relevant protocol headers:
818  *      For a tso pkt, relevant headers are L2/3/4 including options
819  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
820  *      if it's a TCP/UDP pkt
821  *
822  * Returns:
823  *    -1:  error happens during parsing
824  *     0:  protocol headers parsed, but too big to be copied
825  *     1:  protocol headers parsed and copied
826  *
827  * Other effects:
828  *    1. related *ctx fields are updated.
829  *    2. ctx->copy_size is # of bytes copied
830  *    3. the portion to be copied is guaranteed to be in the linear part
831  *
832  */
833 static int
834 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
835                   struct vmxnet3_tx_ctx *ctx,
836                   struct vmxnet3_adapter *adapter)
837 {
838         u8 protocol = 0;
839 
840         if (ctx->mss) { /* TSO */
841                 ctx->eth_ip_hdr_size = skb_transport_offset(skb);
842                 ctx->l4_hdr_size = tcp_hdrlen(skb);
843                 ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
844         } else {
845                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
846                         ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
847 
848                         if (ctx->ipv4) {
849                                 const struct iphdr *iph = ip_hdr(skb);
850 
851                                 protocol = iph->protocol;
852                         } else if (ctx->ipv6) {
853                                 const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
854 
855                                 protocol = ipv6h->nexthdr;
856                         }
857 
858                         switch (protocol) {
859                         case IPPROTO_TCP:
860                                 ctx->l4_hdr_size = tcp_hdrlen(skb);
861                                 break;
862                         case IPPROTO_UDP:
863                                 ctx->l4_hdr_size = sizeof(struct udphdr);
864                                 break;
865                         default:
866                                 ctx->l4_hdr_size = 0;
867                                 break;
868                         }
869 
870                         ctx->copy_size = min(ctx->eth_ip_hdr_size +
871                                          ctx->l4_hdr_size, skb->len);
872                 } else {
873                         ctx->eth_ip_hdr_size = 0;
874                         ctx->l4_hdr_size = 0;
875                         /* copy as much as allowed */
876                         ctx->copy_size = min_t(unsigned int,
877                                                tq->txdata_desc_size,
878                                                skb_headlen(skb));
879                 }
880 
881                 if (skb->len <= VMXNET3_HDR_COPY_SIZE)
882                         ctx->copy_size = skb->len;
883 
884                 /* make sure headers are accessible directly */
885                 if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
886                         goto err;
887         }
888 
889         if (unlikely(ctx->copy_size > tq->txdata_desc_size)) {
890                 tq->stats.oversized_hdr++;
891                 ctx->copy_size = 0;
892                 return 0;
893         }
894 
895         return 1;
896 err:
897         return -1;
898 }
899 
900 /*
901  *    copy relevant protocol headers to the transmit ring:
902  *      For a tso pkt, relevant headers are L2/3/4 including options
903  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
904  *      if it's a TCP/UDP pkt
905  *
906  *
907  *    Note that this requires that vmxnet3_parse_hdr be called first to set the
908  *      appropriate bits in ctx first
909  */
910 static void
911 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
912                  struct vmxnet3_tx_ctx *ctx,
913                  struct vmxnet3_adapter *adapter)
914 {
915         struct Vmxnet3_TxDataDesc *tdd;
916 
917         tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base +
918                                             tq->tx_ring.next2fill *
919                                             tq->txdata_desc_size);
920 
921         memcpy(tdd->data, skb->data, ctx->copy_size);
922         netdev_dbg(adapter->netdev,
923                 "copy %u bytes to dataRing[%u]\n",
924                 ctx->copy_size, tq->tx_ring.next2fill);
925 }
926 
927 
928 static void
929 vmxnet3_prepare_tso(struct sk_buff *skb,
930                     struct vmxnet3_tx_ctx *ctx)
931 {
932         struct tcphdr *tcph = tcp_hdr(skb);
933 
934         if (ctx->ipv4) {
935                 struct iphdr *iph = ip_hdr(skb);
936 
937                 iph->check = 0;
938                 tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
939                                                  IPPROTO_TCP, 0);
940         } else if (ctx->ipv6) {
941                 struct ipv6hdr *iph = ipv6_hdr(skb);
942 
943                 tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
944                                                IPPROTO_TCP, 0);
945         }
946 }
947 
948 static int txd_estimate(const struct sk_buff *skb)
949 {
950         int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
951         int i;
952 
953         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
954                 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
955 
956                 count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
957         }
958         return count;
959 }
960 
961 /*
962  * Transmits a pkt thru a given tq
963  * Returns:
964  *    NETDEV_TX_OK:      descriptors are setup successfully
965  *    NETDEV_TX_OK:      error occurred, the pkt is dropped
966  *    NETDEV_TX_BUSY:    tx ring is full, queue is stopped
967  *
968  * Side-effects:
969  *    1. tx ring may be changed
970  *    2. tq stats may be updated accordingly
971  *    3. shared->txNumDeferred may be updated
972  */
973 
974 static int
975 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
976                 struct vmxnet3_adapter *adapter, struct net_device *netdev)
977 {
978         int ret;
979         u32 count;
980         unsigned long flags;
981         struct vmxnet3_tx_ctx ctx;
982         union Vmxnet3_GenericDesc *gdesc;
983 #ifdef __BIG_ENDIAN_BITFIELD
984         /* Use temporary descriptor to avoid touching bits multiple times */
985         union Vmxnet3_GenericDesc tempTxDesc;
986 #endif
987 
988         count = txd_estimate(skb);
989 
990         ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
991         ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
992 
993         ctx.mss = skb_shinfo(skb)->gso_size;
994         if (ctx.mss) {
995                 if (skb_header_cloned(skb)) {
996                         if (unlikely(pskb_expand_head(skb, 0, 0,
997                                                       GFP_ATOMIC) != 0)) {
998                                 tq->stats.drop_tso++;
999                                 goto drop_pkt;
1000                         }
1001                         tq->stats.copy_skb_header++;
1002                 }
1003                 vmxnet3_prepare_tso(skb, &ctx);
1004         } else {
1005                 if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
1006 
1007                         /* non-tso pkts must not use more than
1008                          * VMXNET3_MAX_TXD_PER_PKT entries
1009                          */
1010                         if (skb_linearize(skb) != 0) {
1011                                 tq->stats.drop_too_many_frags++;
1012                                 goto drop_pkt;
1013                         }
1014                         tq->stats.linearized++;
1015 
1016                         /* recalculate the # of descriptors to use */
1017                         count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1018                 }
1019         }
1020 
1021         ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter);
1022         if (ret >= 0) {
1023                 BUG_ON(ret <= 0 && ctx.copy_size != 0);
1024                 /* hdrs parsed, check against other limits */
1025                 if (ctx.mss) {
1026                         if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
1027                                      VMXNET3_MAX_TX_BUF_SIZE)) {
1028                                 tq->stats.drop_oversized_hdr++;
1029                                 goto drop_pkt;
1030                         }
1031                 } else {
1032                         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1033                                 if (unlikely(ctx.eth_ip_hdr_size +
1034                                              skb->csum_offset >
1035                                              VMXNET3_MAX_CSUM_OFFSET)) {
1036                                         tq->stats.drop_oversized_hdr++;
1037                                         goto drop_pkt;
1038                                 }
1039                         }
1040                 }
1041         } else {
1042                 tq->stats.drop_hdr_inspect_err++;
1043                 goto drop_pkt;
1044         }
1045 
1046         spin_lock_irqsave(&tq->tx_lock, flags);
1047 
1048         if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
1049                 tq->stats.tx_ring_full++;
1050                 netdev_dbg(adapter->netdev,
1051                         "tx queue stopped on %s, next2comp %u"
1052                         " next2fill %u\n", adapter->netdev->name,
1053                         tq->tx_ring.next2comp, tq->tx_ring.next2fill);
1054 
1055                 vmxnet3_tq_stop(tq, adapter);
1056                 spin_unlock_irqrestore(&tq->tx_lock, flags);
1057                 return NETDEV_TX_BUSY;
1058         }
1059 
1060 
1061         vmxnet3_copy_hdr(skb, tq, &ctx, adapter);
1062 
1063         /* fill tx descs related to addr & len */
1064         if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter))
1065                 goto unlock_drop_pkt;
1066 
1067         /* setup the EOP desc */
1068         ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1069 
1070         /* setup the SOP desc */
1071 #ifdef __BIG_ENDIAN_BITFIELD
1072         gdesc = &tempTxDesc;
1073         gdesc->dword[2] = ctx.sop_txd->dword[2];
1074         gdesc->dword[3] = ctx.sop_txd->dword[3];
1075 #else
1076         gdesc = ctx.sop_txd;
1077 #endif
1078         if (ctx.mss) {
1079                 gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
1080                 gdesc->txd.om = VMXNET3_OM_TSO;
1081                 gdesc->txd.msscof = ctx.mss;
1082                 le32_add_cpu(&tq->shared->txNumDeferred, (skb->len -
1083                              gdesc->txd.hlen + ctx.mss - 1) / ctx.mss);
1084         } else {
1085                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1086                         gdesc->txd.hlen = ctx.eth_ip_hdr_size;
1087                         gdesc->txd.om = VMXNET3_OM_CSUM;
1088                         gdesc->txd.msscof = ctx.eth_ip_hdr_size +
1089                                             skb->csum_offset;
1090                 } else {
1091                         gdesc->txd.om = 0;
1092                         gdesc->txd.msscof = 0;
1093                 }
1094                 le32_add_cpu(&tq->shared->txNumDeferred, 1);
1095         }
1096 
1097         if (skb_vlan_tag_present(skb)) {
1098                 gdesc->txd.ti = 1;
1099                 gdesc->txd.tci = skb_vlan_tag_get(skb);
1100         }
1101 
1102         /* finally flips the GEN bit of the SOP desc. */
1103         gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1104                                                   VMXNET3_TXD_GEN);
1105 #ifdef __BIG_ENDIAN_BITFIELD
1106         /* Finished updating in bitfields of Tx Desc, so write them in original
1107          * place.
1108          */
1109         vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1110                            (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1111         gdesc = ctx.sop_txd;
1112 #endif
1113         netdev_dbg(adapter->netdev,
1114                 "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1115                 (u32)(ctx.sop_txd -
1116                 tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1117                 le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1118 
1119         spin_unlock_irqrestore(&tq->tx_lock, flags);
1120 
1121         if (le32_to_cpu(tq->shared->txNumDeferred) >=
1122                                         le32_to_cpu(tq->shared->txThreshold)) {
1123                 tq->shared->txNumDeferred = 0;
1124                 VMXNET3_WRITE_BAR0_REG(adapter,
1125                                        VMXNET3_REG_TXPROD + tq->qid * 8,
1126                                        tq->tx_ring.next2fill);
1127         }
1128 
1129         return NETDEV_TX_OK;
1130 
1131 unlock_drop_pkt:
1132         spin_unlock_irqrestore(&tq->tx_lock, flags);
1133 drop_pkt:
1134         tq->stats.drop_total++;
1135         dev_kfree_skb_any(skb);
1136         return NETDEV_TX_OK;
1137 }
1138 
1139 
1140 static netdev_tx_t
1141 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1142 {
1143         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1144 
1145         BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1146         return vmxnet3_tq_xmit(skb,
1147                                &adapter->tx_queue[skb->queue_mapping],
1148                                adapter, netdev);
1149 }
1150 
1151 
1152 static void
1153 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1154                 struct sk_buff *skb,
1155                 union Vmxnet3_GenericDesc *gdesc)
1156 {
1157         if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1158                 if (gdesc->rcd.v4 &&
1159                     (le32_to_cpu(gdesc->dword[3]) &
1160                      VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) {
1161                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1162                         BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1163                         BUG_ON(gdesc->rcd.frg);
1164                 } else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) &
1165                                              (1 << VMXNET3_RCD_TUC_SHIFT))) {
1166                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1167                         BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
1168                         BUG_ON(gdesc->rcd.frg);
1169                 } else {
1170                         if (gdesc->rcd.csum) {
1171                                 skb->csum = htons(gdesc->rcd.csum);
1172                                 skb->ip_summed = CHECKSUM_PARTIAL;
1173                         } else {
1174                                 skb_checksum_none_assert(skb);
1175                         }
1176                 }
1177         } else {
1178                 skb_checksum_none_assert(skb);
1179         }
1180 }
1181 
1182 
1183 static void
1184 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1185                  struct vmxnet3_rx_ctx *ctx,  struct vmxnet3_adapter *adapter)
1186 {
1187         rq->stats.drop_err++;
1188         if (!rcd->fcs)
1189                 rq->stats.drop_fcs++;
1190 
1191         rq->stats.drop_total++;
1192 
1193         /*
1194          * We do not unmap and chain the rx buffer to the skb.
1195          * We basically pretend this buffer is not used and will be recycled
1196          * by vmxnet3_rq_alloc_rx_buf()
1197          */
1198 
1199         /*
1200          * ctx->skb may be NULL if this is the first and the only one
1201          * desc for the pkt
1202          */
1203         if (ctx->skb)
1204                 dev_kfree_skb_irq(ctx->skb);
1205 
1206         ctx->skb = NULL;
1207 }
1208 
1209 
1210 static u32
1211 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
1212                     union Vmxnet3_GenericDesc *gdesc)
1213 {
1214         u32 hlen, maplen;
1215         union {
1216                 void *ptr;
1217                 struct ethhdr *eth;
1218                 struct iphdr *ipv4;
1219                 struct ipv6hdr *ipv6;
1220                 struct tcphdr *tcp;
1221         } hdr;
1222         BUG_ON(gdesc->rcd.tcp == 0);
1223 
1224         maplen = skb_headlen(skb);
1225         if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
1226                 return 0;
1227 
1228         hdr.eth = eth_hdr(skb);
1229         if (gdesc->rcd.v4) {
1230                 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP));
1231                 hdr.ptr += sizeof(struct ethhdr);
1232                 BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
1233                 hlen = hdr.ipv4->ihl << 2;
1234                 hdr.ptr += hdr.ipv4->ihl << 2;
1235         } else if (gdesc->rcd.v6) {
1236                 BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6));
1237                 hdr.ptr += sizeof(struct ethhdr);
1238                 /* Use an estimated value, since we also need to handle
1239                  * TSO case.
1240                  */
1241                 if (hdr.ipv6->nexthdr != IPPROTO_TCP)
1242                         return sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
1243                 hlen = sizeof(struct ipv6hdr);
1244                 hdr.ptr += sizeof(struct ipv6hdr);
1245         } else {
1246                 /* Non-IP pkt, dont estimate header length */
1247                 return 0;
1248         }
1249 
1250         if (hlen + sizeof(struct tcphdr) > maplen)
1251                 return 0;
1252 
1253         return (hlen + (hdr.tcp->doff << 2));
1254 }
1255 
1256 static int
1257 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1258                        struct vmxnet3_adapter *adapter, int quota)
1259 {
1260         static const u32 rxprod_reg[2] = {
1261                 VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2
1262         };
1263         u32 num_pkts = 0;
1264         bool skip_page_frags = false;
1265         struct Vmxnet3_RxCompDesc *rcd;
1266         struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1267         u16 segCnt = 0, mss = 0;
1268 #ifdef __BIG_ENDIAN_BITFIELD
1269         struct Vmxnet3_RxDesc rxCmdDesc;
1270         struct Vmxnet3_RxCompDesc rxComp;
1271 #endif
1272         vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1273                           &rxComp);
1274         while (rcd->gen == rq->comp_ring.gen) {
1275                 struct vmxnet3_rx_buf_info *rbi;
1276                 struct sk_buff *skb, *new_skb = NULL;
1277                 struct page *new_page = NULL;
1278                 dma_addr_t new_dma_addr;
1279                 int num_to_alloc;
1280                 struct Vmxnet3_RxDesc *rxd;
1281                 u32 idx, ring_idx;
1282                 struct vmxnet3_cmd_ring *ring = NULL;
1283                 if (num_pkts >= quota) {
1284                         /* we may stop even before we see the EOP desc of
1285                          * the current pkt
1286                          */
1287                         break;
1288                 }
1289                 BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 &&
1290                        rcd->rqID != rq->dataRingQid);
1291                 idx = rcd->rxdIdx;
1292                 ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID);
1293                 ring = rq->rx_ring + ring_idx;
1294                 vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1295                                   &rxCmdDesc);
1296                 rbi = rq->buf_info[ring_idx] + idx;
1297 
1298                 BUG_ON(rxd->addr != rbi->dma_addr ||
1299                        rxd->len != rbi->len);
1300 
1301                 if (unlikely(rcd->eop && rcd->err)) {
1302                         vmxnet3_rx_error(rq, rcd, ctx, adapter);
1303                         goto rcd_done;
1304                 }
1305 
1306                 if (rcd->sop) { /* first buf of the pkt */
1307                         bool rxDataRingUsed;
1308                         u16 len;
1309 
1310                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1311                                (rcd->rqID != rq->qid &&
1312                                 rcd->rqID != rq->dataRingQid));
1313 
1314                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB);
1315                         BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1316 
1317                         if (unlikely(rcd->len == 0)) {
1318                                 /* Pretend the rx buffer is skipped. */
1319                                 BUG_ON(!(rcd->sop && rcd->eop));
1320                                 netdev_dbg(adapter->netdev,
1321                                         "rxRing[%u][%u] 0 length\n",
1322                                         ring_idx, idx);
1323                                 goto rcd_done;
1324                         }
1325 
1326                         skip_page_frags = false;
1327                         ctx->skb = rbi->skb;
1328 
1329                         rxDataRingUsed =
1330                                 VMXNET3_RX_DATA_RING(adapter, rcd->rqID);
1331                         len = rxDataRingUsed ? rcd->len : rbi->len;
1332                         new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1333                                                             len);
1334                         if (new_skb == NULL) {
1335                                 /* Skb allocation failed, do not handover this
1336                                  * skb to stack. Reuse it. Drop the existing pkt
1337                                  */
1338                                 rq->stats.rx_buf_alloc_failure++;
1339                                 ctx->skb = NULL;
1340                                 rq->stats.drop_total++;
1341                                 skip_page_frags = true;
1342                                 goto rcd_done;
1343                         }
1344 
1345                         if (rxDataRingUsed) {
1346                                 size_t sz;
1347 
1348                                 BUG_ON(rcd->len > rq->data_ring.desc_size);
1349 
1350                                 ctx->skb = new_skb;
1351                                 sz = rcd->rxdIdx * rq->data_ring.desc_size;
1352                                 memcpy(new_skb->data,
1353                                        &rq->data_ring.base[sz], rcd->len);
1354                         } else {
1355                                 ctx->skb = rbi->skb;
1356 
1357                                 new_dma_addr =
1358                                         dma_map_single(&adapter->pdev->dev,
1359                                                        new_skb->data, rbi->len,
1360                                                        PCI_DMA_FROMDEVICE);
1361                                 if (dma_mapping_error(&adapter->pdev->dev,
1362                                                       new_dma_addr)) {
1363                                         dev_kfree_skb(new_skb);
1364                                         /* Skb allocation failed, do not
1365                                          * handover this skb to stack. Reuse
1366                                          * it. Drop the existing pkt.
1367                                          */
1368                                         rq->stats.rx_buf_alloc_failure++;
1369                                         ctx->skb = NULL;
1370                                         rq->stats.drop_total++;
1371                                         skip_page_frags = true;
1372                                         goto rcd_done;
1373                                 }
1374 
1375                                 dma_unmap_single(&adapter->pdev->dev,
1376                                                  rbi->dma_addr,
1377                                                  rbi->len,
1378                                                  PCI_DMA_FROMDEVICE);
1379 
1380                                 /* Immediate refill */
1381                                 rbi->skb = new_skb;
1382                                 rbi->dma_addr = new_dma_addr;
1383                                 rxd->addr = cpu_to_le64(rbi->dma_addr);
1384                                 rxd->len = rbi->len;
1385                         }
1386 
1387 #ifdef VMXNET3_RSS
1388                         if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1389                             (adapter->netdev->features & NETIF_F_RXHASH))
1390                                 skb_set_hash(ctx->skb,
1391                                              le32_to_cpu(rcd->rssHash),
1392                                              PKT_HASH_TYPE_L3);
1393 #endif
1394                         skb_put(ctx->skb, rcd->len);
1395 
1396                         if (VMXNET3_VERSION_GE_2(adapter) &&
1397                             rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
1398                                 struct Vmxnet3_RxCompDescExt *rcdlro;
1399                                 rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd;
1400 
1401                                 segCnt = rcdlro->segCnt;
1402                                 WARN_ON_ONCE(segCnt == 0);
1403                                 mss = rcdlro->mss;
1404                                 if (unlikely(segCnt <= 1))
1405                                         segCnt = 0;
1406                         } else {
1407                                 segCnt = 0;
1408                         }
1409                 } else {
1410                         BUG_ON(ctx->skb == NULL && !skip_page_frags);
1411 
1412                         /* non SOP buffer must be type 1 in most cases */
1413                         BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1414                         BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1415 
1416                         /* If an sop buffer was dropped, skip all
1417                          * following non-sop fragments. They will be reused.
1418                          */
1419                         if (skip_page_frags)
1420                                 goto rcd_done;
1421 
1422                         if (rcd->len) {
1423                                 new_page = alloc_page(GFP_ATOMIC);
1424                                 /* Replacement page frag could not be allocated.
1425                                  * Reuse this page. Drop the pkt and free the
1426                                  * skb which contained this page as a frag. Skip
1427                                  * processing all the following non-sop frags.
1428                                  */
1429                                 if (unlikely(!new_page)) {
1430                                         rq->stats.rx_buf_alloc_failure++;
1431                                         dev_kfree_skb(ctx->skb);
1432                                         ctx->skb = NULL;
1433                                         skip_page_frags = true;
1434                                         goto rcd_done;
1435                                 }
1436                                 new_dma_addr = dma_map_page(&adapter->pdev->dev,
1437                                                             new_page,
1438                                                             0, PAGE_SIZE,
1439                                                             PCI_DMA_FROMDEVICE);
1440                                 if (dma_mapping_error(&adapter->pdev->dev,
1441                                                       new_dma_addr)) {
1442                                         put_page(new_page);
1443                                         rq->stats.rx_buf_alloc_failure++;
1444                                         dev_kfree_skb(ctx->skb);
1445                                         ctx->skb = NULL;
1446                                         skip_page_frags = true;
1447                                         goto rcd_done;
1448                                 }
1449 
1450                                 dma_unmap_page(&adapter->pdev->dev,
1451                                                rbi->dma_addr, rbi->len,
1452                                                PCI_DMA_FROMDEVICE);
1453 
1454                                 vmxnet3_append_frag(ctx->skb, rcd, rbi);
1455 
1456                                 /* Immediate refill */
1457                                 rbi->page = new_page;
1458                                 rbi->dma_addr = new_dma_addr;
1459                                 rxd->addr = cpu_to_le64(rbi->dma_addr);
1460                                 rxd->len = rbi->len;
1461                         }
1462                 }
1463 
1464 
1465                 skb = ctx->skb;
1466                 if (rcd->eop) {
1467                         u32 mtu = adapter->netdev->mtu;
1468                         skb->len += skb->data_len;
1469 
1470                         vmxnet3_rx_csum(adapter, skb,
1471                                         (union Vmxnet3_GenericDesc *)rcd);
1472                         skb->protocol = eth_type_trans(skb, adapter->netdev);
1473                         if (!rcd->tcp || !adapter->lro)
1474                                 goto not_lro;
1475 
1476                         if (segCnt != 0 && mss != 0) {
1477                                 skb_shinfo(skb)->gso_type = rcd->v4 ?
1478                                         SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1479                                 skb_shinfo(skb)->gso_size = mss;
1480                                 skb_shinfo(skb)->gso_segs = segCnt;
1481                         } else if (segCnt != 0 || skb->len > mtu) {
1482                                 u32 hlen;
1483 
1484                                 hlen = vmxnet3_get_hdr_len(adapter, skb,
1485                                         (union Vmxnet3_GenericDesc *)rcd);
1486                                 if (hlen == 0)
1487                                         goto not_lro;
1488 
1489                                 skb_shinfo(skb)->gso_type =
1490                                         rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1491                                 if (segCnt != 0) {
1492                                         skb_shinfo(skb)->gso_segs = segCnt;
1493                                         skb_shinfo(skb)->gso_size =
1494                                                 DIV_ROUND_UP(skb->len -
1495                                                         hlen, segCnt);
1496                                 } else {
1497                                         skb_shinfo(skb)->gso_size = mtu - hlen;
1498                                 }
1499                         }
1500 not_lro:
1501                         if (unlikely(rcd->ts))
1502                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1503 
1504                         if (adapter->netdev->features & NETIF_F_LRO)
1505                                 netif_receive_skb(skb);
1506                         else
1507                                 napi_gro_receive(&rq->napi, skb);
1508 
1509                         ctx->skb = NULL;
1510                         num_pkts++;
1511                 }
1512 
1513 rcd_done:
1514                 /* device may have skipped some rx descs */
1515                 ring->next2comp = idx;
1516                 num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1517                 ring = rq->rx_ring + ring_idx;
1518                 while (num_to_alloc) {
1519                         vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1520                                           &rxCmdDesc);
1521                         BUG_ON(!rxd->addr);
1522 
1523                         /* Recv desc is ready to be used by the device */
1524                         rxd->gen = ring->gen;
1525                         vmxnet3_cmd_ring_adv_next2fill(ring);
1526                         num_to_alloc--;
1527                 }
1528 
1529                 /* if needed, update the register */
1530                 if (unlikely(rq->shared->updateRxProd)) {
1531                         VMXNET3_WRITE_BAR0_REG(adapter,
1532                                                rxprod_reg[ring_idx] + rq->qid * 8,
1533                                                ring->next2fill);
1534                 }
1535 
1536                 vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1537                 vmxnet3_getRxComp(rcd,
1538                                   &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1539         }
1540 
1541         return num_pkts;
1542 }
1543 
1544 
1545 static void
1546 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1547                    struct vmxnet3_adapter *adapter)
1548 {
1549         u32 i, ring_idx;
1550         struct Vmxnet3_RxDesc *rxd;
1551 
1552         for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1553                 for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1554 #ifdef __BIG_ENDIAN_BITFIELD
1555                         struct Vmxnet3_RxDesc rxDesc;
1556 #endif
1557                         vmxnet3_getRxDesc(rxd,
1558                                 &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1559 
1560                         if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1561                                         rq->buf_info[ring_idx][i].skb) {
1562                                 dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1563                                                  rxd->len, PCI_DMA_FROMDEVICE);
1564                                 dev_kfree_skb(rq->buf_info[ring_idx][i].skb);
1565                                 rq->buf_info[ring_idx][i].skb = NULL;
1566                         } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1567                                         rq->buf_info[ring_idx][i].page) {
1568                                 dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1569                                                rxd->len, PCI_DMA_FROMDEVICE);
1570                                 put_page(rq->buf_info[ring_idx][i].page);
1571                                 rq->buf_info[ring_idx][i].page = NULL;
1572                         }
1573                 }
1574 
1575                 rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1576                 rq->rx_ring[ring_idx].next2fill =
1577                                         rq->rx_ring[ring_idx].next2comp = 0;
1578         }
1579 
1580         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1581         rq->comp_ring.next2proc = 0;
1582 }
1583 
1584 
1585 static void
1586 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1587 {
1588         int i;
1589 
1590         for (i = 0; i < adapter->num_rx_queues; i++)
1591                 vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1592 }
1593 
1594 
1595 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1596                                struct vmxnet3_adapter *adapter)
1597 {
1598         int i;
1599         int j;
1600 
1601         /* all rx buffers must have already been freed */
1602         for (i = 0; i < 2; i++) {
1603                 if (rq->buf_info[i]) {
1604                         for (j = 0; j < rq->rx_ring[i].size; j++)
1605                                 BUG_ON(rq->buf_info[i][j].page != NULL);
1606                 }
1607         }
1608 
1609 
1610         for (i = 0; i < 2; i++) {
1611                 if (rq->rx_ring[i].base) {
1612                         dma_free_coherent(&adapter->pdev->dev,
1613                                           rq->rx_ring[i].size
1614                                           * sizeof(struct Vmxnet3_RxDesc),
1615                                           rq->rx_ring[i].base,
1616                                           rq->rx_ring[i].basePA);
1617                         rq->rx_ring[i].base = NULL;
1618                 }
1619                 rq->buf_info[i] = NULL;
1620         }
1621 
1622         if (rq->data_ring.base) {
1623                 dma_free_coherent(&adapter->pdev->dev,
1624                                   rq->rx_ring[0].size * rq->data_ring.desc_size,
1625                                   rq->data_ring.base, rq->data_ring.basePA);
1626                 rq->data_ring.base = NULL;
1627         }
1628 
1629         if (rq->comp_ring.base) {
1630                 dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
1631                                   * sizeof(struct Vmxnet3_RxCompDesc),
1632                                   rq->comp_ring.base, rq->comp_ring.basePA);
1633                 rq->comp_ring.base = NULL;
1634         }
1635 
1636         if (rq->buf_info[0]) {
1637                 size_t sz = sizeof(struct vmxnet3_rx_buf_info) *
1638                         (rq->rx_ring[0].size + rq->rx_ring[1].size);
1639                 dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
1640                                   rq->buf_info_pa);
1641         }
1642 }
1643 
1644 static void
1645 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter)
1646 {
1647         int i;
1648 
1649         for (i = 0; i < adapter->num_rx_queues; i++) {
1650                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
1651 
1652                 if (rq->data_ring.base) {
1653                         dma_free_coherent(&adapter->pdev->dev,
1654                                           (rq->rx_ring[0].size *
1655                                           rq->data_ring.desc_size),
1656                                           rq->data_ring.base,
1657                                           rq->data_ring.basePA);
1658                         rq->data_ring.base = NULL;
1659                         rq->data_ring.desc_size = 0;
1660                 }
1661         }
1662 }
1663 
1664 static int
1665 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
1666                 struct vmxnet3_adapter  *adapter)
1667 {
1668         int i;
1669 
1670         /* initialize buf_info */
1671         for (i = 0; i < rq->rx_ring[0].size; i++) {
1672 
1673                 /* 1st buf for a pkt is skbuff */
1674                 if (i % adapter->rx_buf_per_pkt == 0) {
1675                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB;
1676                         rq->buf_info[0][i].len = adapter->skb_buf_size;
1677                 } else { /* subsequent bufs for a pkt is frag */
1678                         rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
1679                         rq->buf_info[0][i].len = PAGE_SIZE;
1680                 }
1681         }
1682         for (i = 0; i < rq->rx_ring[1].size; i++) {
1683                 rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
1684                 rq->buf_info[1][i].len = PAGE_SIZE;
1685         }
1686 
1687         /* reset internal state and allocate buffers for both rings */
1688         for (i = 0; i < 2; i++) {
1689                 rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
1690 
1691                 memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
1692                        sizeof(struct Vmxnet3_RxDesc));
1693                 rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
1694         }
1695         if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
1696                                     adapter) == 0) {
1697                 /* at least has 1 rx buffer for the 1st ring */
1698                 return -ENOMEM;
1699         }
1700         vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
1701 
1702         /* reset the comp ring */
1703         rq->comp_ring.next2proc = 0;
1704         memset(rq->comp_ring.base, 0, rq->comp_ring.size *
1705                sizeof(struct Vmxnet3_RxCompDesc));
1706         rq->comp_ring.gen = VMXNET3_INIT_GEN;
1707 
1708         /* reset rxctx */
1709         rq->rx_ctx.skb = NULL;
1710 
1711         /* stats are not reset */
1712         return 0;
1713 }
1714 
1715 
1716 static int
1717 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
1718 {
1719         int i, err = 0;
1720 
1721         for (i = 0; i < adapter->num_rx_queues; i++) {
1722                 err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
1723                 if (unlikely(err)) {
1724                         dev_err(&adapter->netdev->dev, "%s: failed to "
1725                                 "initialize rx queue%i\n",
1726                                 adapter->netdev->name, i);
1727                         break;
1728                 }
1729         }
1730         return err;
1731 
1732 }
1733 
1734 
1735 static int
1736 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
1737 {
1738         int i;
1739         size_t sz;
1740         struct vmxnet3_rx_buf_info *bi;
1741 
1742         for (i = 0; i < 2; i++) {
1743 
1744                 sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
1745                 rq->rx_ring[i].base = dma_alloc_coherent(
1746                                                 &adapter->pdev->dev, sz,
1747                                                 &rq->rx_ring[i].basePA,
1748                                                 GFP_KERNEL);
1749                 if (!rq->rx_ring[i].base) {
1750                         netdev_err(adapter->netdev,
1751                                    "failed to allocate rx ring %d\n", i);
1752                         goto err;
1753                 }
1754         }
1755 
1756         if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) {
1757                 sz = rq->rx_ring[0].size * rq->data_ring.desc_size;
1758                 rq->data_ring.base =
1759                         dma_alloc_coherent(&adapter->pdev->dev, sz,
1760                                            &rq->data_ring.basePA,
1761                                            GFP_KERNEL);
1762                 if (!rq->data_ring.base) {
1763                         netdev_err(adapter->netdev,
1764                                    "rx data ring will be disabled\n");
1765                         adapter->rxdataring_enabled = false;
1766                 }
1767         } else {
1768                 rq->data_ring.base = NULL;
1769                 rq->data_ring.desc_size = 0;
1770         }
1771 
1772         sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
1773         rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
1774                                                 &rq->comp_ring.basePA,
1775                                                 GFP_KERNEL);
1776         if (!rq->comp_ring.base) {
1777                 netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
1778                 goto err;
1779         }
1780 
1781         sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size +
1782                                                    rq->rx_ring[1].size);
1783         bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa,
1784                                  GFP_KERNEL);
1785         if (!bi)
1786                 goto err;
1787 
1788         rq->buf_info[0] = bi;
1789         rq->buf_info[1] = bi + rq->rx_ring[0].size;
1790 
1791         return 0;
1792 
1793 err:
1794         vmxnet3_rq_destroy(rq, adapter);
1795         return -ENOMEM;
1796 }
1797 
1798 
1799 static int
1800 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
1801 {
1802         int i, err = 0;
1803 
1804         adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
1805 
1806         for (i = 0; i < adapter->num_rx_queues; i++) {
1807                 err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
1808                 if (unlikely(err)) {
1809                         dev_err(&adapter->netdev->dev,
1810                                 "%s: failed to create rx queue%i\n",
1811                                 adapter->netdev->name, i);
1812                         goto err_out;
1813                 }
1814         }
1815 
1816         if (!adapter->rxdataring_enabled)
1817                 vmxnet3_rq_destroy_all_rxdataring(adapter);
1818 
1819         return err;
1820 err_out:
1821         vmxnet3_rq_destroy_all(adapter);
1822         return err;
1823 
1824 }
1825 
1826 /* Multiple queue aware polling function for tx and rx */
1827 
1828 static int
1829 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
1830 {
1831         int rcd_done = 0, i;
1832         if (unlikely(adapter->shared->ecr))
1833                 vmxnet3_process_events(adapter);
1834         for (i = 0; i < adapter->num_tx_queues; i++)
1835                 vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
1836 
1837         for (i = 0; i < adapter->num_rx_queues; i++)
1838                 rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
1839                                                    adapter, budget);
1840         return rcd_done;
1841 }
1842 
1843 
1844 static int
1845 vmxnet3_poll(struct napi_struct *napi, int budget)
1846 {
1847         struct vmxnet3_rx_queue *rx_queue = container_of(napi,
1848                                           struct vmxnet3_rx_queue, napi);
1849         int rxd_done;
1850 
1851         rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
1852 
1853         if (rxd_done < budget) {
1854                 napi_complete(napi);
1855                 vmxnet3_enable_all_intrs(rx_queue->adapter);
1856         }
1857         return rxd_done;
1858 }
1859 
1860 /*
1861  * NAPI polling function for MSI-X mode with multiple Rx queues
1862  * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
1863  */
1864 
1865 static int
1866 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
1867 {
1868         struct vmxnet3_rx_queue *rq = container_of(napi,
1869                                                 struct vmxnet3_rx_queue, napi);
1870         struct vmxnet3_adapter *adapter = rq->adapter;
1871         int rxd_done;
1872 
1873         /* When sharing interrupt with corresponding tx queue, process
1874          * tx completions in that queue as well
1875          */
1876         if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
1877                 struct vmxnet3_tx_queue *tq =
1878                                 &adapter->tx_queue[rq - adapter->rx_queue];
1879                 vmxnet3_tq_tx_complete(tq, adapter);
1880         }
1881 
1882         rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
1883 
1884         if (rxd_done < budget) {
1885                 napi_complete(napi);
1886                 vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
1887         }
1888         return rxd_done;
1889 }
1890 
1891 
1892 #ifdef CONFIG_PCI_MSI
1893 
1894 /*
1895  * Handle completion interrupts on tx queues
1896  * Returns whether or not the intr is handled
1897  */
1898 
1899 static irqreturn_t
1900 vmxnet3_msix_tx(int irq, void *data)
1901 {
1902         struct vmxnet3_tx_queue *tq = data;
1903         struct vmxnet3_adapter *adapter = tq->adapter;
1904 
1905         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1906                 vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
1907 
1908         /* Handle the case where only one irq is allocate for all tx queues */
1909         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
1910                 int i;
1911                 for (i = 0; i < adapter->num_tx_queues; i++) {
1912                         struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
1913                         vmxnet3_tq_tx_complete(txq, adapter);
1914                 }
1915         } else {
1916                 vmxnet3_tq_tx_complete(tq, adapter);
1917         }
1918         vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
1919 
1920         return IRQ_HANDLED;
1921 }
1922 
1923 
1924 /*
1925  * Handle completion interrupts on rx queues. Returns whether or not the
1926  * intr is handled
1927  */
1928 
1929 static irqreturn_t
1930 vmxnet3_msix_rx(int irq, void *data)
1931 {
1932         struct vmxnet3_rx_queue *rq = data;
1933         struct vmxnet3_adapter *adapter = rq->adapter;
1934 
1935         /* disable intr if needed */
1936         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1937                 vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
1938         napi_schedule(&rq->napi);
1939 
1940         return IRQ_HANDLED;
1941 }
1942 
1943 /*
1944  *----------------------------------------------------------------------------
1945  *
1946  * vmxnet3_msix_event --
1947  *
1948  *    vmxnet3 msix event intr handler
1949  *
1950  * Result:
1951  *    whether or not the intr is handled
1952  *
1953  *----------------------------------------------------------------------------
1954  */
1955 
1956 static irqreturn_t
1957 vmxnet3_msix_event(int irq, void *data)
1958 {
1959         struct net_device *dev = data;
1960         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1961 
1962         /* disable intr if needed */
1963         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1964                 vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
1965 
1966         if (adapter->shared->ecr)
1967                 vmxnet3_process_events(adapter);
1968 
1969         vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
1970 
1971         return IRQ_HANDLED;
1972 }
1973 
1974 #endif /* CONFIG_PCI_MSI  */
1975 
1976 
1977 /* Interrupt handler for vmxnet3  */
1978 static irqreturn_t
1979 vmxnet3_intr(int irq, void *dev_id)
1980 {
1981         struct net_device *dev = dev_id;
1982         struct vmxnet3_adapter *adapter = netdev_priv(dev);
1983 
1984         if (adapter->intr.type == VMXNET3_IT_INTX) {
1985                 u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
1986                 if (unlikely(icr == 0))
1987                         /* not ours */
1988                         return IRQ_NONE;
1989         }
1990 
1991 
1992         /* disable intr if needed */
1993         if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
1994                 vmxnet3_disable_all_intrs(adapter);
1995 
1996         napi_schedule(&adapter->rx_queue[0].napi);
1997 
1998         return IRQ_HANDLED;
1999 }
2000 
2001 #ifdef CONFIG_NET_POLL_CONTROLLER
2002 
2003 /* netpoll callback. */
2004 static void
2005 vmxnet3_netpoll(struct net_device *netdev)
2006 {
2007         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2008 
2009         switch (adapter->intr.type) {
2010 #ifdef CONFIG_PCI_MSI
2011         case VMXNET3_IT_MSIX: {
2012                 int i;
2013                 for (i = 0; i < adapter->num_rx_queues; i++)
2014                         vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
2015                 break;
2016         }
2017 #endif
2018         case VMXNET3_IT_MSI:
2019         default:
2020                 vmxnet3_intr(0, adapter->netdev);
2021                 break;
2022         }
2023 
2024 }
2025 #endif  /* CONFIG_NET_POLL_CONTROLLER */
2026 
2027 static int
2028 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
2029 {
2030         struct vmxnet3_intr *intr = &adapter->intr;
2031         int err = 0, i;
2032         int vector = 0;
2033 
2034 #ifdef CONFIG_PCI_MSI
2035         if (adapter->intr.type == VMXNET3_IT_MSIX) {
2036                 for (i = 0; i < adapter->num_tx_queues; i++) {
2037                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2038                                 sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
2039                                         adapter->netdev->name, vector);
2040                                 err = request_irq(
2041                                               intr->msix_entries[vector].vector,
2042                                               vmxnet3_msix_tx, 0,
2043                                               adapter->tx_queue[i].name,
2044                                               &adapter->tx_queue[i]);
2045                         } else {
2046                                 sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
2047                                         adapter->netdev->name, vector);
2048                         }
2049                         if (err) {
2050                                 dev_err(&adapter->netdev->dev,
2051                                         "Failed to request irq for MSIX, %s, "
2052                                         "error %d\n",
2053                                         adapter->tx_queue[i].name, err);
2054                                 return err;
2055                         }
2056 
2057                         /* Handle the case where only 1 MSIx was allocated for
2058                          * all tx queues */
2059                         if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
2060                                 for (; i < adapter->num_tx_queues; i++)
2061                                         adapter->tx_queue[i].comp_ring.intr_idx
2062                                                                 = vector;
2063                                 vector++;
2064                                 break;
2065                         } else {
2066                                 adapter->tx_queue[i].comp_ring.intr_idx
2067                                                                 = vector++;
2068                         }
2069                 }
2070                 if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
2071                         vector = 0;
2072 
2073                 for (i = 0; i < adapter->num_rx_queues; i++) {
2074                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
2075                                 sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
2076                                         adapter->netdev->name, vector);
2077                         else
2078                                 sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
2079                                         adapter->netdev->name, vector);
2080                         err = request_irq(intr->msix_entries[vector].vector,
2081                                           vmxnet3_msix_rx, 0,
2082                                           adapter->rx_queue[i].name,
2083                                           &(adapter->rx_queue[i]));
2084                         if (err) {
2085                                 netdev_err(adapter->netdev,
2086                                            "Failed to request irq for MSIX, "
2087                                            "%s, error %d\n",
2088                                            adapter->rx_queue[i].name, err);
2089                                 return err;
2090                         }
2091 
2092                         adapter->rx_queue[i].comp_ring.intr_idx = vector++;
2093                 }
2094 
2095                 sprintf(intr->event_msi_vector_name, "%s-event-%d",
2096                         adapter->netdev->name, vector);
2097                 err = request_irq(intr->msix_entries[vector].vector,
2098                                   vmxnet3_msix_event, 0,
2099                                   intr->event_msi_vector_name, adapter->netdev);
2100                 intr->event_intr_idx = vector;
2101 
2102         } else if (intr->type == VMXNET3_IT_MSI) {
2103                 adapter->num_rx_queues = 1;
2104                 err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
2105                                   adapter->netdev->name, adapter->netdev);
2106         } else {
2107 #endif
2108                 adapter->num_rx_queues = 1;
2109                 err = request_irq(adapter->pdev->irq, vmxnet3_intr,
2110                                   IRQF_SHARED, adapter->netdev->name,
2111                                   adapter->netdev);
2112 #ifdef CONFIG_PCI_MSI
2113         }
2114 #endif
2115         intr->num_intrs = vector + 1;
2116         if (err) {
2117                 netdev_err(adapter->netdev,
2118                            "Failed to request irq (intr type:%d), error %d\n",
2119                            intr->type, err);
2120         } else {
2121                 /* Number of rx queues will not change after this */
2122                 for (i = 0; i < adapter->num_rx_queues; i++) {
2123                         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2124                         rq->qid = i;
2125                         rq->qid2 = i + adapter->num_rx_queues;
2126                         rq->dataRingQid = i + 2 * adapter->num_rx_queues;
2127                 }
2128 
2129                 /* init our intr settings */
2130                 for (i = 0; i < intr->num_intrs; i++)
2131                         intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
2132                 if (adapter->intr.type != VMXNET3_IT_MSIX) {
2133                         adapter->intr.event_intr_idx = 0;
2134                         for (i = 0; i < adapter->num_tx_queues; i++)
2135                                 adapter->tx_queue[i].comp_ring.intr_idx = 0;
2136                         adapter->rx_queue[0].comp_ring.intr_idx = 0;
2137                 }
2138 
2139                 netdev_info(adapter->netdev,
2140                             "intr type %u, mode %u, %u vectors allocated\n",
2141                             intr->type, intr->mask_mode, intr->num_intrs);
2142         }
2143 
2144         return err;
2145 }
2146 
2147 
2148 static void
2149 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
2150 {
2151         struct vmxnet3_intr *intr = &adapter->intr;
2152         BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
2153 
2154         switch (intr->type) {
2155 #ifdef CONFIG_PCI_MSI
2156         case VMXNET3_IT_MSIX:
2157         {
2158                 int i, vector = 0;
2159 
2160                 if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2161                         for (i = 0; i < adapter->num_tx_queues; i++) {
2162                                 free_irq(intr->msix_entries[vector++].vector,
2163                                          &(adapter->tx_queue[i]));
2164                                 if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
2165                                         break;
2166                         }
2167                 }
2168 
2169                 for (i = 0; i < adapter->num_rx_queues; i++) {
2170                         free_irq(intr->msix_entries[vector++].vector,
2171                                  &(adapter->rx_queue[i]));
2172                 }
2173 
2174                 free_irq(intr->msix_entries[vector].vector,
2175                          adapter->netdev);
2176                 BUG_ON(vector >= intr->num_intrs);
2177                 break;
2178         }
2179 #endif
2180         case VMXNET3_IT_MSI:
2181                 free_irq(adapter->pdev->irq, adapter->netdev);
2182                 break;
2183         case VMXNET3_IT_INTX:
2184                 free_irq(adapter->pdev->irq, adapter->netdev);
2185                 break;
2186         default:
2187                 BUG();
2188         }
2189 }
2190 
2191 
2192 static void
2193 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
2194 {
2195         u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2196         u16 vid;
2197 
2198         /* allow untagged pkts */
2199         VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
2200 
2201         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2202                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2203 }
2204 
2205 
2206 static int
2207 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2208 {
2209         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2210 
2211         if (!(netdev->flags & IFF_PROMISC)) {
2212                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2213                 unsigned long flags;
2214 
2215                 VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2216                 spin_lock_irqsave(&adapter->cmd_lock, flags);
2217                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2218                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2219                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2220         }
2221 
2222         set_bit(vid, adapter->active_vlans);
2223 
2224         return 0;
2225 }
2226 
2227 
2228 static int
2229 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2230 {
2231         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2232 
2233         if (!(netdev->flags & IFF_PROMISC)) {
2234                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2235                 unsigned long flags;
2236 
2237                 VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2238                 spin_lock_irqsave(&adapter->cmd_lock, flags);
2239                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2240                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2241                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2242         }
2243 
2244         clear_bit(vid, adapter->active_vlans);
2245 
2246         return 0;
2247 }
2248 
2249 
2250 static u8 *
2251 vmxnet3_copy_mc(struct net_device *netdev)
2252 {
2253         u8 *buf = NULL;
2254         u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2255 
2256         /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2257         if (sz <= 0xffff) {
2258                 /* We may be called with BH disabled */
2259                 buf = kmalloc(sz, GFP_ATOMIC);
2260                 if (buf) {
2261                         struct netdev_hw_addr *ha;
2262                         int i = 0;
2263 
2264                         netdev_for_each_mc_addr(ha, netdev)
2265                                 memcpy(buf + i++ * ETH_ALEN, ha->addr,
2266                                        ETH_ALEN);
2267                 }
2268         }
2269         return buf;
2270 }
2271 
2272 
2273 static void
2274 vmxnet3_set_mc(struct net_device *netdev)
2275 {
2276         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2277         unsigned long flags;
2278         struct Vmxnet3_RxFilterConf *rxConf =
2279                                         &adapter->shared->devRead.rxFilterConf;
2280         u8 *new_table = NULL;
2281         dma_addr_t new_table_pa = 0;
2282         bool new_table_pa_valid = false;
2283         u32 new_mode = VMXNET3_RXM_UCAST;
2284 
2285         if (netdev->flags & IFF_PROMISC) {
2286                 u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2287                 memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2288 
2289                 new_mode |= VMXNET3_RXM_PROMISC;
2290         } else {
2291                 vmxnet3_restore_vlan(adapter);
2292         }
2293 
2294         if (netdev->flags & IFF_BROADCAST)
2295                 new_mode |= VMXNET3_RXM_BCAST;
2296 
2297         if (netdev->flags & IFF_ALLMULTI)
2298                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2299         else
2300                 if (!netdev_mc_empty(netdev)) {
2301                         new_table = vmxnet3_copy_mc(netdev);
2302                         if (new_table) {
2303                                 size_t sz = netdev_mc_count(netdev) * ETH_ALEN;
2304 
2305                                 rxConf->mfTableLen = cpu_to_le16(sz);
2306                                 new_table_pa = dma_map_single(
2307                                                         &adapter->pdev->dev,
2308                                                         new_table,
2309                                                         sz,
2310                                                         PCI_DMA_TODEVICE);
2311                                 if (!dma_mapping_error(&adapter->pdev->dev,
2312                                                        new_table_pa)) {
2313                                         new_mode |= VMXNET3_RXM_MCAST;
2314                                         new_table_pa_valid = true;
2315                                         rxConf->mfTablePA = cpu_to_le64(
2316                                                                 new_table_pa);
2317                                 }
2318                         }
2319                         if (!new_table_pa_valid) {
2320                                 netdev_info(netdev,
2321                                             "failed to copy mcast list, setting ALL_MULTI\n");
2322                                 new_mode |= VMXNET3_RXM_ALL_MULTI;
2323                         }
2324                 }
2325 
2326         if (!(new_mode & VMXNET3_RXM_MCAST)) {
2327                 rxConf->mfTableLen = 0;
2328                 rxConf->mfTablePA = 0;
2329         }
2330 
2331         spin_lock_irqsave(&adapter->cmd_lock, flags);
2332         if (new_mode != rxConf->rxMode) {
2333                 rxConf->rxMode = cpu_to_le32(new_mode);
2334                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2335                                        VMXNET3_CMD_UPDATE_RX_MODE);
2336                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2337                                        VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2338         }
2339 
2340         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2341                                VMXNET3_CMD_UPDATE_MAC_FILTERS);
2342         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2343 
2344         if (new_table_pa_valid)
2345                 dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2346                                  rxConf->mfTableLen, PCI_DMA_TODEVICE);
2347         kfree(new_table);
2348 }
2349 
2350 void
2351 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2352 {
2353         int i;
2354 
2355         for (i = 0; i < adapter->num_rx_queues; i++)
2356                 vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2357 }
2358 
2359 
2360 /*
2361  *   Set up driver_shared based on settings in adapter.
2362  */
2363 
2364 static void
2365 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2366 {
2367         struct Vmxnet3_DriverShared *shared = adapter->shared;
2368         struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2369         struct Vmxnet3_TxQueueConf *tqc;
2370         struct Vmxnet3_RxQueueConf *rqc;
2371         int i;
2372 
2373         memset(shared, 0, sizeof(*shared));
2374 
2375         /* driver settings */
2376         shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2377         devRead->misc.driverInfo.version = cpu_to_le32(
2378                                                 VMXNET3_DRIVER_VERSION_NUM);
2379         devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2380                                 VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2381         devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2382         *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2383                                 *((u32 *)&devRead->misc.driverInfo.gos));
2384         devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2385         devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2386 
2387         devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2388         devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2389 
2390         /* set up feature flags */
2391         if (adapter->netdev->features & NETIF_F_RXCSUM)
2392                 devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2393 
2394         if (adapter->netdev->features & NETIF_F_LRO) {
2395                 devRead->misc.uptFeatures |= UPT1_F_LRO;
2396                 devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2397         }
2398         if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2399                 devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2400 
2401         devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2402         devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2403         devRead->misc.queueDescLen = cpu_to_le32(
2404                 adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2405                 adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2406 
2407         /* tx queue settings */
2408         devRead->misc.numTxQueues =  adapter->num_tx_queues;
2409         for (i = 0; i < adapter->num_tx_queues; i++) {
2410                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2411                 BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2412                 tqc = &adapter->tqd_start[i].conf;
2413                 tqc->txRingBasePA   = cpu_to_le64(tq->tx_ring.basePA);
2414                 tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2415                 tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2416                 tqc->ddPA           = cpu_to_le64(tq->buf_info_pa);
2417                 tqc->txRingSize     = cpu_to_le32(tq->tx_ring.size);
2418                 tqc->dataRingSize   = cpu_to_le32(tq->data_ring.size);
2419                 tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size);
2420                 tqc->compRingSize   = cpu_to_le32(tq->comp_ring.size);
2421                 tqc->ddLen          = cpu_to_le32(
2422                                         sizeof(struct vmxnet3_tx_buf_info) *
2423                                         tqc->txRingSize);
2424                 tqc->intrIdx        = tq->comp_ring.intr_idx;
2425         }
2426 
2427         /* rx queue settings */
2428         devRead->misc.numRxQueues = adapter->num_rx_queues;
2429         for (i = 0; i < adapter->num_rx_queues; i++) {
2430                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2431                 rqc = &adapter->rqd_start[i].conf;
2432                 rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2433                 rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2434                 rqc->compRingBasePA  = cpu_to_le64(rq->comp_ring.basePA);
2435                 rqc->ddPA            = cpu_to_le64(rq->buf_info_pa);
2436                 rqc->rxRingSize[0]   = cpu_to_le32(rq->rx_ring[0].size);
2437                 rqc->rxRingSize[1]   = cpu_to_le32(rq->rx_ring[1].size);
2438                 rqc->compRingSize    = cpu_to_le32(rq->comp_ring.size);
2439                 rqc->ddLen           = cpu_to_le32(
2440                                         sizeof(struct vmxnet3_rx_buf_info) *
2441                                         (rqc->rxRingSize[0] +
2442                                          rqc->rxRingSize[1]));
2443                 rqc->intrIdx         = rq->comp_ring.intr_idx;
2444                 if (VMXNET3_VERSION_GE_3(adapter)) {
2445                         rqc->rxDataRingBasePA =
2446                                 cpu_to_le64(rq->data_ring.basePA);
2447                         rqc->rxDataRingDescSize =
2448                                 cpu_to_le16(rq->data_ring.desc_size);
2449                 }
2450         }
2451 
2452 #ifdef VMXNET3_RSS
2453         memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2454 
2455         if (adapter->rss) {
2456                 struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2457 
2458                 devRead->misc.uptFeatures |= UPT1_F_RSS;
2459                 devRead->misc.numRxQueues = adapter->num_rx_queues;
2460                 rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2461                                     UPT1_RSS_HASH_TYPE_IPV4 |
2462                                     UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2463                                     UPT1_RSS_HASH_TYPE_IPV6;
2464                 rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2465                 rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2466                 rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2467                 netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2468 
2469                 for (i = 0; i < rssConf->indTableSize; i++)
2470                         rssConf->indTable[i] = ethtool_rxfh_indir_default(
2471                                 i, adapter->num_rx_queues);
2472 
2473                 devRead->rssConfDesc.confVer = 1;
2474                 devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2475                 devRead->rssConfDesc.confPA =
2476                         cpu_to_le64(adapter->rss_conf_pa);
2477         }
2478 
2479 #endif /* VMXNET3_RSS */
2480 
2481         /* intr settings */
2482         devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2483                                      VMXNET3_IMM_AUTO;
2484         devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2485         for (i = 0; i < adapter->intr.num_intrs; i++)
2486                 devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2487 
2488         devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2489         devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2490 
2491         /* rx filter settings */
2492         devRead->rxFilterConf.rxMode = 0;
2493         vmxnet3_restore_vlan(adapter);
2494         vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2495 
2496         /* the rest are already zeroed */
2497 }
2498 
2499 static void
2500 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter)
2501 {
2502         struct Vmxnet3_DriverShared *shared = adapter->shared;
2503         union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2504         unsigned long flags;
2505 
2506         if (!VMXNET3_VERSION_GE_3(adapter))
2507                 return;
2508 
2509         spin_lock_irqsave(&adapter->cmd_lock, flags);
2510         cmdInfo->varConf.confVer = 1;
2511         cmdInfo->varConf.confLen =
2512                 cpu_to_le32(sizeof(*adapter->coal_conf));
2513         cmdInfo->varConf.confPA  = cpu_to_le64(adapter->coal_conf_pa);
2514 
2515         if (adapter->default_coal_mode) {
2516                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2517                                        VMXNET3_CMD_GET_COALESCE);
2518         } else {
2519                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2520                                        VMXNET3_CMD_SET_COALESCE);
2521         }
2522 
2523         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2524 }
2525 
2526 int
2527 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
2528 {
2529         int err, i;
2530         u32 ret;
2531         unsigned long flags;
2532 
2533         netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
2534                 " ring sizes %u %u %u\n", adapter->netdev->name,
2535                 adapter->skb_buf_size, adapter->rx_buf_per_pkt,
2536                 adapter->tx_queue[0].tx_ring.size,
2537                 adapter->rx_queue[0].rx_ring[0].size,
2538                 adapter->rx_queue[0].rx_ring[1].size);
2539 
2540         vmxnet3_tq_init_all(adapter);
2541         err = vmxnet3_rq_init_all(adapter);
2542         if (err) {
2543                 netdev_err(adapter->netdev,
2544                            "Failed to init rx queue error %d\n", err);
2545                 goto rq_err;
2546         }
2547 
2548         err = vmxnet3_request_irqs(adapter);
2549         if (err) {
2550                 netdev_err(adapter->netdev,
2551                            "Failed to setup irq for error %d\n", err);
2552                 goto irq_err;
2553         }
2554 
2555         vmxnet3_setup_driver_shared(adapter);
2556 
2557         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
2558                                adapter->shared_pa));
2559         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
2560                                adapter->shared_pa));
2561         spin_lock_irqsave(&adapter->cmd_lock, flags);
2562         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2563                                VMXNET3_CMD_ACTIVATE_DEV);
2564         ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2565         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2566 
2567         if (ret != 0) {
2568                 netdev_err(adapter->netdev,
2569                            "Failed to activate dev: error %u\n", ret);
2570                 err = -EINVAL;
2571                 goto activate_err;
2572         }
2573 
2574         vmxnet3_init_coalesce(adapter);
2575 
2576         for (i = 0; i < adapter->num_rx_queues; i++) {
2577                 VMXNET3_WRITE_BAR0_REG(adapter,
2578                                 VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN,
2579                                 adapter->rx_queue[i].rx_ring[0].next2fill);
2580                 VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 +
2581                                 (i * VMXNET3_REG_ALIGN)),
2582                                 adapter->rx_queue[i].rx_ring[1].next2fill);
2583         }
2584 
2585         /* Apply the rx filter settins last. */
2586         vmxnet3_set_mc(adapter->netdev);
2587 
2588         /*
2589          * Check link state when first activating device. It will start the
2590          * tx queue if the link is up.
2591          */
2592         vmxnet3_check_link(adapter, true);
2593         for (i = 0; i < adapter->num_rx_queues; i++)
2594                 napi_enable(&adapter->rx_queue[i].napi);
2595         vmxnet3_enable_all_intrs(adapter);
2596         clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
2597         return 0;
2598 
2599 activate_err:
2600         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
2601         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
2602         vmxnet3_free_irqs(adapter);
2603 irq_err:
2604 rq_err:
2605         /* free up buffers we allocated */
2606         vmxnet3_rq_cleanup_all(adapter);
2607         return err;
2608 }
2609 
2610 
2611 void
2612 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
2613 {
2614         unsigned long flags;
2615         spin_lock_irqsave(&adapter->cmd_lock, flags);
2616         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
2617         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2618 }
2619 
2620 
2621 int
2622 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
2623 {
2624         int i;
2625         unsigned long flags;
2626         if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
2627                 return 0;
2628 
2629 
2630         spin_lock_irqsave(&adapter->cmd_lock, flags);
2631         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2632                                VMXNET3_CMD_QUIESCE_DEV);
2633         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2634         vmxnet3_disable_all_intrs(adapter);
2635 
2636         for (i = 0; i < adapter->num_rx_queues; i++)
2637                 napi_disable(&adapter->rx_queue[i].napi);
2638         netif_tx_disable(adapter->netdev);
2639         adapter->link_speed = 0;
2640         netif_carrier_off(adapter->netdev);
2641 
2642         vmxnet3_tq_cleanup_all(adapter);
2643         vmxnet3_rq_cleanup_all(adapter);
2644         vmxnet3_free_irqs(adapter);
2645         return 0;
2646 }
2647 
2648 
2649 static void
2650 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
2651 {
2652         u32 tmp;
2653 
2654         tmp = *(u32 *)mac;
2655         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
2656 
2657         tmp = (mac[5] << 8) | mac[4];
2658         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
2659 }
2660 
2661 
2662 static int
2663 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
2664 {
2665         struct sockaddr *addr = p;
2666         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2667 
2668         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2669         vmxnet3_write_mac_addr(adapter, addr->sa_data);
2670 
2671         return 0;
2672 }
2673 
2674 
2675 /* ==================== initialization and cleanup routines ============ */
2676 
2677 static int
2678 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64)
2679 {
2680         int err;
2681         unsigned long mmio_start, mmio_len;
2682         struct pci_dev *pdev = adapter->pdev;
2683 
2684         err = pci_enable_device(pdev);
2685         if (err) {
2686                 dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
2687                 return err;
2688         }
2689 
2690         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
2691                 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
2692                         dev_err(&pdev->dev,
2693                                 "pci_set_consistent_dma_mask failed\n");
2694                         err = -EIO;
2695                         goto err_set_mask;
2696                 }
2697                 *dma64 = true;
2698         } else {
2699                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2700                         dev_err(&pdev->dev,
2701                                 "pci_set_dma_mask failed\n");
2702                         err = -EIO;
2703                         goto err_set_mask;
2704                 }
2705                 *dma64 = false;
2706         }
2707 
2708         err = pci_request_selected_regions(pdev, (1 << 2) - 1,
2709                                            vmxnet3_driver_name);
2710         if (err) {
2711                 dev_err(&pdev->dev,
2712                         "Failed to request region for adapter: error %d\n", err);
2713                 goto err_set_mask;
2714         }
2715 
2716         pci_set_master(pdev);
2717 
2718         mmio_start = pci_resource_start(pdev, 0);
2719         mmio_len = pci_resource_len(pdev, 0);
2720         adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
2721         if (!adapter->hw_addr0) {
2722                 dev_err(&pdev->dev, "Failed to map bar0\n");
2723                 err = -EIO;
2724                 goto err_ioremap;
2725         }
2726 
2727         mmio_start = pci_resource_start(pdev, 1);
2728         mmio_len = pci_resource_len(pdev, 1);
2729         adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
2730         if (!adapter->hw_addr1) {
2731                 dev_err(&pdev->dev, "Failed to map bar1\n");
2732                 err = -EIO;
2733                 goto err_bar1;
2734         }
2735         return 0;
2736 
2737 err_bar1:
2738         iounmap(adapter->hw_addr0);
2739 err_ioremap:
2740         pci_release_selected_regions(pdev, (1 << 2) - 1);
2741 err_set_mask:
2742         pci_disable_device(pdev);
2743         return err;
2744 }
2745 
2746 
2747 static void
2748 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
2749 {
2750         BUG_ON(!adapter->pdev);
2751 
2752         iounmap(adapter->hw_addr0);
2753         iounmap(adapter->hw_addr1);
2754         pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
2755         pci_disable_device(adapter->pdev);
2756 }
2757 
2758 
2759 static void
2760 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
2761 {
2762         size_t sz, i, ring0_size, ring1_size, comp_size;
2763         struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0];
2764 
2765 
2766         if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
2767                                     VMXNET3_MAX_ETH_HDR_SIZE) {
2768                 adapter->skb_buf_size = adapter->netdev->mtu +
2769                                         VMXNET3_MAX_ETH_HDR_SIZE;
2770                 if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
2771                         adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
2772 
2773                 adapter->rx_buf_per_pkt = 1;
2774         } else {
2775                 adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
2776                 sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
2777                                             VMXNET3_MAX_ETH_HDR_SIZE;
2778                 adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
2779         }
2780 
2781         /*
2782          * for simplicity, force the ring0 size to be a multiple of
2783          * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
2784          */
2785         sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
2786         ring0_size = adapter->rx_queue[0].rx_ring[0].size;
2787         ring0_size = (ring0_size + sz - 1) / sz * sz;
2788         ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
2789                            sz * sz);
2790         ring1_size = adapter->rx_queue[0].rx_ring[1].size;
2791         ring1_size = (ring1_size + sz - 1) / sz * sz;
2792         ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
2793                            sz * sz);
2794         comp_size = ring0_size + ring1_size;
2795 
2796         for (i = 0; i < adapter->num_rx_queues; i++) {
2797                 rq = &adapter->rx_queue[i];
2798                 rq->rx_ring[0].size = ring0_size;
2799                 rq->rx_ring[1].size = ring1_size;
2800                 rq->comp_ring.size = comp_size;
2801         }
2802 }
2803 
2804 
2805 int
2806 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
2807                       u32 rx_ring_size, u32 rx_ring2_size,
2808                       u16 txdata_desc_size, u16 rxdata_desc_size)
2809 {
2810         int err = 0, i;
2811 
2812         for (i = 0; i < adapter->num_tx_queues; i++) {
2813                 struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
2814                 tq->tx_ring.size   = tx_ring_size;
2815                 tq->data_ring.size = tx_ring_size;
2816                 tq->comp_ring.size = tx_ring_size;
2817                 tq->txdata_desc_size = txdata_desc_size;
2818                 tq->shared = &adapter->tqd_start[i].ctrl;
2819                 tq->stopped = true;
2820                 tq->adapter = adapter;
2821                 tq->qid = i;
2822                 err = vmxnet3_tq_create(tq, adapter);
2823                 /*
2824                  * Too late to change num_tx_queues. We cannot do away with
2825                  * lesser number of queues than what we asked for
2826                  */
2827                 if (err)
2828                         goto queue_err;
2829         }
2830 
2831         adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
2832         adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
2833         vmxnet3_adjust_rx_ring_size(adapter);
2834 
2835         adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
2836         for (i = 0; i < adapter->num_rx_queues; i++) {
2837                 struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2838                 /* qid and qid2 for rx queues will be assigned later when num
2839                  * of rx queues is finalized after allocating intrs */
2840                 rq->shared = &adapter->rqd_start[i].ctrl;
2841                 rq->adapter = adapter;
2842                 rq->data_ring.desc_size = rxdata_desc_size;
2843                 err = vmxnet3_rq_create(rq, adapter);
2844                 if (err) {
2845                         if (i == 0) {
2846                                 netdev_err(adapter->netdev,
2847                                            "Could not allocate any rx queues. "
2848                                            "Aborting.\n");
2849                                 goto queue_err;
2850                         } else {
2851                                 netdev_info(adapter->netdev,
2852                                             "Number of rx queues changed "
2853                                             "to : %d.\n", i);
2854                                 adapter->num_rx_queues = i;
2855                                 err = 0;
2856                                 break;
2857                         }
2858                 }
2859         }
2860 
2861         if (!adapter->rxdataring_enabled)
2862                 vmxnet3_rq_destroy_all_rxdataring(adapter);
2863 
2864         return err;
2865 queue_err:
2866         vmxnet3_tq_destroy_all(adapter);
2867         return err;
2868 }
2869 
2870 static int
2871 vmxnet3_open(struct net_device *netdev)
2872 {
2873         struct vmxnet3_adapter *adapter;
2874         int err, i;
2875 
2876         adapter = netdev_priv(netdev);
2877 
2878         for (i = 0; i < adapter->num_tx_queues; i++)
2879                 spin_lock_init(&adapter->tx_queue[i].tx_lock);
2880 
2881         if (VMXNET3_VERSION_GE_3(adapter)) {
2882                 unsigned long flags;
2883                 u16 txdata_desc_size;
2884 
2885                 spin_lock_irqsave(&adapter->cmd_lock, flags);
2886                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2887                                        VMXNET3_CMD_GET_TXDATA_DESC_SIZE);
2888                 txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter,
2889                                                          VMXNET3_REG_CMD);
2890                 spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2891 
2892                 if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) ||
2893                     (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) ||
2894                     (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) {
2895                         adapter->txdata_desc_size =
2896                                 sizeof(struct Vmxnet3_TxDataDesc);
2897                 } else {
2898                         adapter->txdata_desc_size = txdata_desc_size;
2899                 }
2900         } else {
2901                 adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc);
2902         }
2903 
2904         err = vmxnet3_create_queues(adapter,
2905                                     adapter->tx_ring_size,
2906                                     adapter->rx_ring_size,
2907                                     adapter->rx_ring2_size,
2908                                     adapter->txdata_desc_size,
2909                                     adapter->rxdata_desc_size);
2910         if (err)
2911                 goto queue_err;
2912 
2913         err = vmxnet3_activate_dev(adapter);
2914         if (err)
2915                 goto activate_err;
2916 
2917         return 0;
2918 
2919 activate_err:
2920         vmxnet3_rq_destroy_all(adapter);
2921         vmxnet3_tq_destroy_all(adapter);
2922 queue_err:
2923         return err;
2924 }
2925 
2926 
2927 static int
2928 vmxnet3_close(struct net_device *netdev)
2929 {
2930         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2931 
2932         /*
2933          * Reset_work may be in the middle of resetting the device, wait for its
2934          * completion.
2935          */
2936         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2937                 msleep(1);
2938 
2939         vmxnet3_quiesce_dev(adapter);
2940 
2941         vmxnet3_rq_destroy_all(adapter);
2942         vmxnet3_tq_destroy_all(adapter);
2943 
2944         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
2945 
2946 
2947         return 0;
2948 }
2949 
2950 
2951 void
2952 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
2953 {
2954         int i;
2955 
2956         /*
2957          * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
2958          * vmxnet3_close() will deadlock.
2959          */
2960         BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
2961 
2962         /* we need to enable NAPI, otherwise dev_close will deadlock */
2963         for (i = 0; i < adapter->num_rx_queues; i++)
2964                 napi_enable(&adapter->rx_queue[i].napi);
2965         dev_close(adapter->netdev);
2966 }
2967 
2968 
2969 static int
2970 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
2971 {
2972         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2973         int err = 0;
2974 
2975         if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU)
2976                 return -EINVAL;
2977 
2978         netdev->mtu = new_mtu;
2979 
2980         /*
2981          * Reset_work may be in the middle of resetting the device, wait for its
2982          * completion.
2983          */
2984         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
2985                 msleep(1);
2986 
2987         if (netif_running(netdev)) {
2988                 vmxnet3_quiesce_dev(adapter);
2989                 vmxnet3_reset_dev(adapter);
2990 
2991                 /* we need to re-create the rx queue based on the new mtu */
2992                 vmxnet3_rq_destroy_all(adapter);
2993                 vmxnet3_adjust_rx_ring_size(adapter);
2994                 err = vmxnet3_rq_create_all(adapter);
2995                 if (err) {
2996                         netdev_err(netdev,
2997                                    "failed to re-create rx queues, "
2998                                    " error %d. Closing it.\n", err);
2999                         goto out;
3000                 }
3001 
3002                 err = vmxnet3_activate_dev(adapter);
3003                 if (err) {
3004                         netdev_err(netdev,
3005                                    "failed to re-activate, error %d. "
3006                                    "Closing it\n", err);
3007                         goto out;
3008                 }
3009         }
3010 
3011 out:
3012         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3013         if (err)
3014                 vmxnet3_force_close(adapter);
3015 
3016         return err;
3017 }
3018 
3019 
3020 static void
3021 vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
3022 {
3023         struct net_device *netdev = adapter->netdev;
3024 
3025         netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
3026                 NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
3027                 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
3028                 NETIF_F_LRO;
3029         if (dma64)
3030                 netdev->hw_features |= NETIF_F_HIGHDMA;
3031         netdev->vlan_features = netdev->hw_features &
3032                                 ~(NETIF_F_HW_VLAN_CTAG_TX |
3033                                   NETIF_F_HW_VLAN_CTAG_RX);
3034         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
3035 }
3036 
3037 
3038 static void
3039 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
3040 {
3041         u32 tmp;
3042 
3043         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
3044         *(u32 *)mac = tmp;
3045 
3046         tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
3047         mac[4] = tmp & 0xff;
3048         mac[5] = (tmp >> 8) & 0xff;
3049 }
3050 
3051 #ifdef CONFIG_PCI_MSI
3052 
3053 /*
3054  * Enable MSIx vectors.
3055  * Returns :
3056  *      VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
3057  *       were enabled.
3058  *      number of vectors which were enabled otherwise (this number is greater
3059  *       than VMXNET3_LINUX_MIN_MSIX_VECT)
3060  */
3061 
3062 static int
3063 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
3064 {
3065         int ret = pci_enable_msix_range(adapter->pdev,
3066                                         adapter->intr.msix_entries, nvec, nvec);
3067 
3068         if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
3069                 dev_err(&adapter->netdev->dev,
3070                         "Failed to enable %d MSI-X, trying %d\n",
3071                         nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
3072 
3073                 ret = pci_enable_msix_range(adapter->pdev,
3074                                             adapter->intr.msix_entries,
3075                                             VMXNET3_LINUX_MIN_MSIX_VECT,
3076                                             VMXNET3_LINUX_MIN_MSIX_VECT);
3077         }
3078 
3079         if (ret < 0) {
3080                 dev_err(&adapter->netdev->dev,
3081                         "Failed to enable MSI-X, error: %d\n", ret);
3082         }
3083 
3084         return ret;
3085 }
3086 
3087 
3088 #endif /* CONFIG_PCI_MSI */
3089 
3090 static void
3091 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
3092 {
3093         u32 cfg;
3094         unsigned long flags;
3095 
3096         /* intr settings */
3097         spin_lock_irqsave(&adapter->cmd_lock, flags);
3098         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3099                                VMXNET3_CMD_GET_CONF_INTR);
3100         cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3101         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3102         adapter->intr.type = cfg & 0x3;
3103         adapter->intr.mask_mode = (cfg >> 2) & 0x3;
3104 
3105         if (adapter->intr.type == VMXNET3_IT_AUTO) {
3106                 adapter->intr.type = VMXNET3_IT_MSIX;
3107         }
3108 
3109 #ifdef CONFIG_PCI_MSI
3110         if (adapter->intr.type == VMXNET3_IT_MSIX) {
3111                 int i, nvec;
3112 
3113                 nvec  = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
3114                         1 : adapter->num_tx_queues;
3115                 nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
3116                         0 : adapter->num_rx_queues;
3117                 nvec += 1;      /* for link event */
3118                 nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
3119                        nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
3120 
3121                 for (i = 0; i < nvec; i++)
3122                         adapter->intr.msix_entries[i].entry = i;
3123 
3124                 nvec = vmxnet3_acquire_msix_vectors(adapter, nvec);
3125                 if (nvec < 0)
3126                         goto msix_err;
3127 
3128                 /* If we cannot allocate one MSIx vector per queue
3129                  * then limit the number of rx queues to 1
3130                  */
3131                 if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) {
3132                         if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
3133                             || adapter->num_rx_queues != 1) {
3134                                 adapter->share_intr = VMXNET3_INTR_TXSHARE;
3135                                 netdev_err(adapter->netdev,
3136                                            "Number of rx queues : 1\n");
3137                                 adapter->num_rx_queues = 1;
3138                         }
3139                 }
3140 
3141                 adapter->intr.num_intrs = nvec;
3142                 return;
3143 
3144 msix_err:
3145                 /* If we cannot allocate MSIx vectors use only one rx queue */
3146                 dev_info(&adapter->pdev->dev,
3147                          "Failed to enable MSI-X, error %d. "
3148                          "Limiting #rx queues to 1, try MSI.\n", nvec);
3149 
3150                 adapter->intr.type = VMXNET3_IT_MSI;
3151         }
3152 
3153         if (adapter->intr.type == VMXNET3_IT_MSI) {
3154                 if (!pci_enable_msi(adapter->pdev)) {
3155                         adapter->num_rx_queues = 1;
3156                         adapter->intr.num_intrs = 1;
3157                         return;
3158                 }
3159         }
3160 #endif /* CONFIG_PCI_MSI */
3161 
3162         adapter->num_rx_queues = 1;
3163         dev_info(&adapter->netdev->dev,
3164                  "Using INTx interrupt, #Rx queues: 1.\n");
3165         adapter->intr.type = VMXNET3_IT_INTX;
3166 
3167         /* INT-X related setting */
3168         adapter->intr.num_intrs = 1;
3169 }
3170 
3171 
3172 static void
3173 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
3174 {
3175         if (adapter->intr.type == VMXNET3_IT_MSIX)
3176                 pci_disable_msix(adapter->pdev);
3177         else if (adapter->intr.type == VMXNET3_IT_MSI)
3178                 pci_disable_msi(adapter->pdev);
3179         else
3180                 BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
3181 }
3182 
3183 
3184 static void
3185 vmxnet3_tx_timeout(struct net_device *netdev)
3186 {
3187         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3188         adapter->tx_timeout_count++;
3189 
3190         netdev_err(adapter->netdev, "tx hang\n");
3191         schedule_work(&adapter->work);
3192 }
3193 
3194 
3195 static void
3196 vmxnet3_reset_work(struct work_struct *data)
3197 {
3198         struct vmxnet3_adapter *adapter;
3199 
3200         adapter = container_of(data, struct vmxnet3_adapter, work);
3201 
3202         /* if another thread is resetting the device, no need to proceed */
3203         if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3204                 return;
3205 
3206         /* if the device is closed, we must leave it alone */
3207         rtnl_lock();
3208         if (netif_running(adapter->netdev)) {
3209                 netdev_notice(adapter->netdev, "resetting\n");
3210                 vmxnet3_quiesce_dev(adapter);
3211                 vmxnet3_reset_dev(adapter);
3212                 vmxnet3_activate_dev(adapter);
3213         } else {
3214                 netdev_info(adapter->netdev, "already closed\n");
3215         }
3216         rtnl_unlock();
3217 
3218         netif_wake_queue(adapter->netdev);
3219         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3220 }
3221 
3222 
3223 static int
3224 vmxnet3_probe_device(struct pci_dev *pdev,
3225                      const struct pci_device_id *id)
3226 {
3227         static const struct net_device_ops vmxnet3_netdev_ops = {
3228                 .ndo_open = vmxnet3_open,
3229                 .ndo_stop = vmxnet3_close,
3230                 .ndo_start_xmit = vmxnet3_xmit_frame,
3231                 .ndo_set_mac_address = vmxnet3_set_mac_addr,
3232                 .ndo_change_mtu = vmxnet3_change_mtu,
3233                 .ndo_set_features = vmxnet3_set_features,
3234                 .ndo_get_stats64 = vmxnet3_get_stats64,
3235                 .ndo_tx_timeout = vmxnet3_tx_timeout,
3236                 .ndo_set_rx_mode = vmxnet3_set_mc,
3237                 .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
3238                 .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
3239 #ifdef CONFIG_NET_POLL_CONTROLLER
3240                 .ndo_poll_controller = vmxnet3_netpoll,
3241 #endif
3242         };
3243         int err;
3244         bool dma64 = false; /* stupid gcc */
3245         u32 ver;
3246         struct net_device *netdev;
3247         struct vmxnet3_adapter *adapter;
3248         u8 mac[ETH_ALEN];
3249         int size;
3250         int num_tx_queues;
3251         int num_rx_queues;
3252 
3253         if (!pci_msi_enabled())
3254                 enable_mq = 0;
3255 
3256 #ifdef VMXNET3_RSS
3257         if (enable_mq)
3258                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3259                                     (int)num_online_cpus());
3260         else
3261 #endif
3262                 num_rx_queues = 1;
3263         num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3264 
3265         if (enable_mq)
3266                 num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
3267                                     (int)num_online_cpus());
3268         else
3269                 num_tx_queues = 1;
3270 
3271         num_tx_queues = rounddown_pow_of_two(num_tx_queues);
3272         netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
3273                                    max(num_tx_queues, num_rx_queues));
3274         dev_info(&pdev->dev,
3275                  "# of Tx queues : %d, # of Rx queues : %d\n",
3276                  num_tx_queues, num_rx_queues);
3277 
3278         if (!netdev)
3279                 return -ENOMEM;
3280 
3281         pci_set_drvdata(pdev, netdev);
3282         adapter = netdev_priv(netdev);
3283         adapter->netdev = netdev;
3284         adapter->pdev = pdev;
3285 
3286         adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
3287         adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
3288         adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
3289 
3290         spin_lock_init(&adapter->cmd_lock);
3291         adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
3292                                              sizeof(struct vmxnet3_adapter),
3293                                              PCI_DMA_TODEVICE);
3294         if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) {
3295                 dev_err(&pdev->dev, "Failed to map dma\n");
3296                 err = -EFAULT;
3297                 goto err_dma_map;
3298         }
3299         adapter->shared = dma_alloc_coherent(
3300                                 &adapter->pdev->dev,
3301                                 sizeof(struct Vmxnet3_DriverShared),
3302                                 &adapter->shared_pa, GFP_KERNEL);
3303         if (!adapter->shared) {
3304                 dev_err(&pdev->dev, "Failed to allocate memory\n");
3305                 err = -ENOMEM;
3306                 goto err_alloc_shared;
3307         }
3308 
3309         adapter->num_rx_queues = num_rx_queues;
3310         adapter->num_tx_queues = num_tx_queues;
3311         adapter->rx_buf_per_pkt = 1;
3312 
3313         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3314         size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3315         adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3316                                                 &adapter->queue_desc_pa,
3317                                                 GFP_KERNEL);
3318 
3319         if (!adapter->tqd_start) {
3320                 dev_err(&pdev->dev, "Failed to allocate memory\n");
3321                 err = -ENOMEM;
3322                 goto err_alloc_queue_desc;
3323         }
3324         adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3325                                                             adapter->num_tx_queues);
3326 
3327         adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3328                                               sizeof(struct Vmxnet3_PMConf),
3329                                               &adapter->pm_conf_pa,
3330                                               GFP_KERNEL);
3331         if (adapter->pm_conf == NULL) {
3332                 err = -ENOMEM;
3333                 goto err_alloc_pm;
3334         }
3335 
3336 #ifdef VMXNET3_RSS
3337 
3338         adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
3339                                                sizeof(struct UPT1_RSSConf),
3340                                                &adapter->rss_conf_pa,
3341                                                GFP_KERNEL);
3342         if (adapter->rss_conf == NULL) {
3343                 err = -ENOMEM;
3344                 goto err_alloc_rss;
3345         }
3346 #endif /* VMXNET3_RSS */
3347 
3348         err = vmxnet3_alloc_pci_resources(adapter, &dma64);
3349         if (err < 0)
3350                 goto err_alloc_pci;
3351 
3352         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3353         if (ver & (1 << VMXNET3_REV_3)) {
3354                 VMXNET3_WRITE_BAR1_REG(adapter,
3355                                        VMXNET3_REG_VRRS,
3356                                        1 << VMXNET3_REV_3);
3357                 adapter->version = VMXNET3_REV_3 + 1;
3358         } else if (ver & (1 << VMXNET3_REV_2)) {
3359                 VMXNET3_WRITE_BAR1_REG(adapter,
3360                                        VMXNET3_REG_VRRS,
3361                                        1 << VMXNET3_REV_2);
3362                 adapter->version = VMXNET3_REV_2 + 1;
3363         } else if (ver & (1 << VMXNET3_REV_1)) {
3364                 VMXNET3_WRITE_BAR1_REG(adapter,
3365                                        VMXNET3_REG_VRRS,
3366                                        1 << VMXNET3_REV_1);
3367                 adapter->version = VMXNET3_REV_1 + 1;
3368         } else {
3369                 dev_err(&pdev->dev,
3370                         "Incompatible h/w version (0x%x) for adapter\n", ver);
3371                 err = -EBUSY;
3372                 goto err_ver;
3373         }
3374         dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version);
3375 
3376         ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3377         if (ver & 1) {
3378                 VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3379         } else {
3380                 dev_err(&pdev->dev,
3381                         "Incompatible upt version (0x%x) for adapter\n", ver);
3382                 err = -EBUSY;
3383                 goto err_ver;
3384         }
3385 
3386         if (VMXNET3_VERSION_GE_3(adapter)) {
3387                 adapter->coal_conf =
3388                         dma_alloc_coherent(&adapter->pdev->dev,
3389                                            sizeof(struct Vmxnet3_CoalesceScheme)
3390                                            ,
3391                                            &adapter->coal_conf_pa,
3392                                            GFP_KERNEL);
3393                 if (!adapter->coal_conf) {
3394                         err = -ENOMEM;
3395                         goto err_ver;
3396                 }
3397                 memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
3398                 adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
3399                 adapter->default_coal_mode = true;
3400         }
3401 
3402         SET_NETDEV_DEV(netdev, &pdev->dev);
3403         vmxnet3_declare_features(adapter, dma64);
3404 
3405         adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
3406                 VMXNET3_DEF_RXDATA_DESC_SIZE : 0;
3407 
3408         if (adapter->num_tx_queues == adapter->num_rx_queues)
3409                 adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
3410         else
3411                 adapter->share_intr = VMXNET3_INTR_DONTSHARE;
3412 
3413         vmxnet3_alloc_intr_resources(adapter);
3414 
3415 #ifdef VMXNET3_RSS
3416         if (adapter->num_rx_queues > 1 &&
3417             adapter->intr.type == VMXNET3_IT_MSIX) {
3418                 adapter->rss = true;
3419                 netdev->hw_features |= NETIF_F_RXHASH;
3420                 netdev->features |= NETIF_F_RXHASH;
3421                 dev_dbg(&pdev->dev, "RSS is enabled.\n");
3422         } else {
3423                 adapter->rss = false;
3424         }
3425 #endif
3426 
3427         vmxnet3_read_mac_addr(adapter, mac);
3428         memcpy(netdev->dev_addr,  mac, netdev->addr_len);
3429 
3430         netdev->netdev_ops = &vmxnet3_netdev_ops;
3431         vmxnet3_set_ethtool_ops(netdev);
3432         netdev->watchdog_timeo = 5 * HZ;
3433 
3434         INIT_WORK(&adapter->work, vmxnet3_reset_work);
3435         set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3436 
3437         if (adapter->intr.type == VMXNET3_IT_MSIX) {
3438                 int i;
3439                 for (i = 0; i < adapter->num_rx_queues; i++) {
3440                         netif_napi_add(adapter->netdev,
3441                                        &adapter->rx_queue[i].napi,
3442                                        vmxnet3_poll_rx_only, 64);
3443                 }
3444         } else {
3445                 netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
3446                                vmxnet3_poll, 64);
3447         }
3448 
3449         netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
3450         netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
3451 
3452         netif_carrier_off(netdev);
3453         err = register_netdev(netdev);
3454 
3455         if (err) {
3456                 dev_err(&pdev->dev, "Failed to register adapter\n");
3457                 goto err_register;
3458         }
3459 
3460         vmxnet3_check_link(adapter, false);
3461         return 0;
3462 
3463 err_register:
3464         if (VMXNET3_VERSION_GE_3(adapter)) {
3465                 dma_free_coherent(&adapter->pdev->dev,
3466                                   sizeof(struct Vmxnet3_CoalesceScheme),
3467                                   adapter->coal_conf, adapter->coal_conf_pa);
3468         }
3469         vmxnet3_free_intr_resources(adapter);
3470 err_ver:
3471         vmxnet3_free_pci_resources(adapter);
3472 err_alloc_pci:
3473 #ifdef VMXNET3_RSS
3474         dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3475                           adapter->rss_conf, adapter->rss_conf_pa);
3476 err_alloc_rss:
3477 #endif
3478         dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3479                           adapter->pm_conf, adapter->pm_conf_pa);
3480 err_alloc_pm:
3481         dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3482                           adapter->queue_desc_pa);
3483 err_alloc_queue_desc:
3484         dma_free_coherent(&adapter->pdev->dev,
3485                           sizeof(struct Vmxnet3_DriverShared),
3486                           adapter->shared, adapter->shared_pa);
3487 err_alloc_shared:
3488         dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3489                          sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3490 err_dma_map:
3491         free_netdev(netdev);
3492         return err;
3493 }
3494 
3495 
3496 static void
3497 vmxnet3_remove_device(struct pci_dev *pdev)
3498 {
3499         struct net_device *netdev = pci_get_drvdata(pdev);
3500         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3501         int size = 0;
3502         int num_rx_queues;
3503 
3504 #ifdef VMXNET3_RSS
3505         if (enable_mq)
3506                 num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3507                                     (int)num_online_cpus());
3508         else
3509 #endif
3510                 num_rx_queues = 1;
3511         num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3512 
3513         cancel_work_sync(&adapter->work);
3514 
3515         unregister_netdev(netdev);
3516 
3517         vmxnet3_free_intr_resources(adapter);
3518         vmxnet3_free_pci_resources(adapter);
3519         if (VMXNET3_VERSION_GE_3(adapter)) {
3520                 dma_free_coherent(&adapter->pdev->dev,
3521                                   sizeof(struct Vmxnet3_CoalesceScheme),
3522                                   adapter->coal_conf, adapter->coal_conf_pa);
3523         }
3524 #ifdef VMXNET3_RSS
3525         dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
3526                           adapter->rss_conf, adapter->rss_conf_pa);
3527 #endif
3528         dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
3529                           adapter->pm_conf, adapter->pm_conf_pa);
3530 
3531         size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3532         size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
3533         dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
3534                           adapter->queue_desc_pa);
3535         dma_free_coherent(&adapter->pdev->dev,
3536                           sizeof(struct Vmxnet3_DriverShared),
3537                           adapter->shared, adapter->shared_pa);
3538         dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
3539                          sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE);
3540         free_netdev(netdev);
3541 }
3542 
3543 static void vmxnet3_shutdown_device(struct pci_dev *pdev)
3544 {
3545         struct net_device *netdev = pci_get_drvdata(pdev);
3546         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3547         unsigned long flags;
3548 
3549         /* Reset_work may be in the middle of resetting the device, wait for its
3550          * completion.
3551          */
3552         while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3553                 msleep(1);
3554 
3555         if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED,
3556                              &adapter->state)) {
3557                 clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3558                 return;
3559         }
3560         spin_lock_irqsave(&adapter->cmd_lock, flags);
3561         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3562                                VMXNET3_CMD_QUIESCE_DEV);
3563         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3564         vmxnet3_disable_all_intrs(adapter);
3565 
3566         clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3567 }
3568 
3569 
3570 #ifdef CONFIG_PM
3571 
3572 static int
3573 vmxnet3_suspend(struct device *device)
3574 {
3575         struct pci_dev *pdev = to_pci_dev(device);
3576         struct net_device *netdev = pci_get_drvdata(pdev);
3577         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3578         struct Vmxnet3_PMConf *pmConf;
3579         struct ethhdr *ehdr;
3580         struct arphdr *ahdr;
3581         u8 *arpreq;
3582         struct in_device *in_dev;
3583         struct in_ifaddr *ifa;
3584         unsigned long flags;
3585         int i = 0;
3586 
3587         if (!netif_running(netdev))
3588                 return 0;
3589 
3590         for (i = 0; i < adapter->num_rx_queues; i++)
3591                 napi_disable(&adapter->rx_queue[i].napi);
3592 
3593         vmxnet3_disable_all_intrs(adapter);
3594         vmxnet3_free_irqs(adapter);
3595         vmxnet3_free_intr_resources(adapter);
3596 
3597         netif_device_detach(netdev);
3598         netif_tx_stop_all_queues(netdev);
3599 
3600         /* Create wake-up filters. */
3601         pmConf = adapter->pm_conf;
3602         memset(pmConf, 0, sizeof(*pmConf));
3603 
3604         if (adapter->wol & WAKE_UCAST) {
3605                 pmConf->filters[i].patternSize = ETH_ALEN;
3606                 pmConf->filters[i].maskSize = 1;
3607                 memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
3608                 pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
3609 
3610                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3611                 i++;
3612         }
3613 
3614         if (adapter->wol & WAKE_ARP) {
3615                 in_dev = in_dev_get(netdev);
3616                 if (!in_dev)
3617                         goto skip_arp;
3618 
3619                 ifa = (struct in_ifaddr *)in_dev->ifa_list;
3620                 if (!ifa)
3621                         goto skip_arp;
3622 
3623                 pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
3624                         sizeof(struct arphdr) +         /* ARP header */
3625                         2 * ETH_ALEN +          /* 2 Ethernet addresses*/
3626                         2 * sizeof(u32);        /*2 IPv4 addresses */
3627                 pmConf->filters[i].maskSize =
3628                         (pmConf->filters[i].patternSize - 1) / 8 + 1;
3629 
3630                 /* ETH_P_ARP in Ethernet header. */
3631                 ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
3632                 ehdr->h_proto = htons(ETH_P_ARP);
3633 
3634                 /* ARPOP_REQUEST in ARP header. */
3635                 ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
3636                 ahdr->ar_op = htons(ARPOP_REQUEST);
3637                 arpreq = (u8 *)(ahdr + 1);
3638 
3639                 /* The Unicast IPv4 address in 'tip' field. */
3640                 arpreq += 2 * ETH_ALEN + sizeof(u32);
3641                 *(u32 *)arpreq = ifa->ifa_address;
3642 
3643                 /* The mask for the relevant bits. */
3644                 pmConf->filters[i].mask[0] = 0x00;
3645                 pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
3646                 pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
3647                 pmConf->filters[i].mask[3] = 0x00;
3648                 pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
3649                 pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
3650                 in_dev_put(in_dev);
3651 
3652                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
3653                 i++;
3654         }
3655 
3656 skip_arp:
3657         if (adapter->wol & WAKE_MAGIC)
3658                 pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
3659 
3660         pmConf->numFilters = i;
3661 
3662         adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
3663         adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
3664                                                                   *pmConf));
3665         adapter->shared->devRead.pmConfDesc.confPA =
3666                 cpu_to_le64(adapter->pm_conf_pa);
3667 
3668         spin_lock_irqsave(&adapter->cmd_lock, flags);
3669         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3670                                VMXNET3_CMD_UPDATE_PMCFG);
3671         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3672 
3673         pci_save_state(pdev);
3674         pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
3675                         adapter->wol);
3676         pci_disable_device(pdev);
3677         pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
3678 
3679         return 0;
3680 }
3681 
3682 
3683 static int
3684 vmxnet3_resume(struct device *device)
3685 {
3686         int err;
3687         unsigned long flags;
3688         struct pci_dev *pdev = to_pci_dev(device);
3689         struct net_device *netdev = pci_get_drvdata(pdev);
3690         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3691 
3692         if (!netif_running(netdev))
3693                 return 0;
3694 
3695         pci_set_power_state(pdev, PCI_D0);
3696         pci_restore_state(pdev);
3697         err = pci_enable_device_mem(pdev);
3698         if (err != 0)
3699                 return err;
3700 
3701         pci_enable_wake(pdev, PCI_D0, 0);
3702 
3703         vmxnet3_alloc_intr_resources(adapter);
3704 
3705         /* During hibernate and suspend, device has to be reinitialized as the
3706          * device state need not be preserved.
3707          */
3708 
3709         /* Need not check adapter state as other reset tasks cannot run during
3710          * device resume.
3711          */
3712         spin_lock_irqsave(&adapter->cmd_lock, flags);
3713         VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3714                                VMXNET3_CMD_QUIESCE_DEV);
3715         spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3716         vmxnet3_tq_cleanup_all(adapter);
3717         vmxnet3_rq_cleanup_all(adapter);
3718 
3719         vmxnet3_reset_dev(adapter);
3720         err = vmxnet3_activate_dev(adapter);
3721         if (err != 0) {
3722                 netdev_err(netdev,
3723                            "failed to re-activate on resume, error: %d", err);
3724                 vmxnet3_force_close(adapter);
3725                 return err;
3726         }
3727         netif_device_attach(netdev);
3728 
3729         return 0;
3730 }
3731 
3732 static const struct dev_pm_ops vmxnet3_pm_ops = {
3733         .suspend = vmxnet3_suspend,
3734         .resume = vmxnet3_resume,
3735         .freeze = vmxnet3_suspend,
3736         .restore = vmxnet3_resume,
3737 };
3738 #endif
3739 
3740 static struct pci_driver vmxnet3_driver = {
3741         .name           = vmxnet3_driver_name,
3742         .id_table       = vmxnet3_pciid_table,
3743         .probe          = vmxnet3_probe_device,
3744         .remove         = vmxnet3_remove_device,
3745         .shutdown       = vmxnet3_shutdown_device,
3746 #ifdef CONFIG_PM
3747         .driver.pm      = &vmxnet3_pm_ops,
3748 #endif
3749 };
3750 
3751 
3752 static int __init
3753 vmxnet3_init_module(void)
3754 {
3755         pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
3756                 VMXNET3_DRIVER_VERSION_REPORT);
3757         return pci_register_driver(&vmxnet3_driver);
3758 }
3759 
3760 module_init(vmxnet3_init_module);
3761 
3762 
3763 static void
3764 vmxnet3_exit_module(void)
3765 {
3766         pci_unregister_driver(&vmxnet3_driver);
3767 }
3768 
3769 module_exit(vmxnet3_exit_module);
3770 
3771 MODULE_AUTHOR("VMware, Inc.");
3772 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
3773 MODULE_LICENSE("GPL v2");
3774 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
3775 

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