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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / brocade / bna / bnad.c
1 /*
2 * Linux network driver for Brocade Converged Network Adapter.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License (GPL) Version 2 as
6 * published by the Free Software Foundation
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13 /*
14 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
15 * All rights reserved
16 * www.brocade.com
17 */
18 #include <linux/bitops.h>
19 #include <linux/netdevice.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/in.h>
23 #include <linux/ethtool.h>
24 #include <linux/if_vlan.h>
25 #include <linux/if_ether.h>
26 #include <linux/ip.h>
27 #include <linux/prefetch.h>
28 #include <linux/module.h>
29
30 #include "bnad.h"
31 #include "bna.h"
32 #include "cna.h"
33
34 static DEFINE_MUTEX(bnad_fwimg_mutex);
35
36 /*
37 * Module params
38 */
39 static uint bnad_msix_disable;
40 module_param(bnad_msix_disable, uint, 0444);
41 MODULE_PARM_DESC(bnad_msix_disable, "Disable MSIX mode");
42
43 static uint bnad_ioc_auto_recover = 1;
44 module_param(bnad_ioc_auto_recover, uint, 0444);
45 MODULE_PARM_DESC(bnad_ioc_auto_recover, "Enable / Disable auto recovery");
46
47 /*
48 * Global variables
49 */
50 u32 bnad_rxqs_per_cq = 2;
51
52 static const u8 bnad_bcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
53
54 /*
55 * Local MACROS
56 */
57 #define BNAD_TX_UNMAPQ_DEPTH (bnad->txq_depth * 2)
58
59 #define BNAD_RX_UNMAPQ_DEPTH (bnad->rxq_depth)
60
61 #define BNAD_GET_MBOX_IRQ(_bnad) \
62 (((_bnad)->cfg_flags & BNAD_CF_MSIX) ? \
63 ((_bnad)->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector) : \
64 ((_bnad)->pcidev->irq))
65
66 #define BNAD_FILL_UNMAPQ_MEM_REQ(_res_info, _num, _depth) \
67 do { \
68 (_res_info)->res_type = BNA_RES_T_MEM; \
69 (_res_info)->res_u.mem_info.mem_type = BNA_MEM_T_KVA; \
70 (_res_info)->res_u.mem_info.num = (_num); \
71 (_res_info)->res_u.mem_info.len = \
72 sizeof(struct bnad_unmap_q) + \
73 (sizeof(struct bnad_skb_unmap) * ((_depth) - 1)); \
74 } while (0)
75
76 #define BNAD_TXRX_SYNC_MDELAY 250 /* 250 msecs */
77
78 /*
79 * Reinitialize completions in CQ, once Rx is taken down
80 */
81 static void
82 bnad_cq_cmpl_init(struct bnad *bnad, struct bna_ccb *ccb)
83 {
84 struct bna_cq_entry *cmpl, *next_cmpl;
85 unsigned int wi_range, wis = 0, ccb_prod = 0;
86 int i;
87
88 BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt, cmpl,
89 wi_range);
90
91 for (i = 0; i < ccb->q_depth; i++) {
92 wis++;
93 if (likely(--wi_range))
94 next_cmpl = cmpl + 1;
95 else {
96 BNA_QE_INDX_ADD(ccb_prod, wis, ccb->q_depth);
97 wis = 0;
98 BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt,
99 next_cmpl, wi_range);
100 }
101 cmpl->valid = 0;
102 cmpl = next_cmpl;
103 }
104 }
105
106 static u32
107 bnad_pci_unmap_skb(struct device *pdev, struct bnad_skb_unmap *array,
108 u32 index, u32 depth, struct sk_buff *skb, u32 frag)
109 {
110 int j;
111 array[index].skb = NULL;
112
113 dma_unmap_single(pdev, dma_unmap_addr(&array[index], dma_addr),
114 skb_headlen(skb), DMA_TO_DEVICE);
115 dma_unmap_addr_set(&array[index], dma_addr, 0);
116 BNA_QE_INDX_ADD(index, 1, depth);
117
118 for (j = 0; j < frag; j++) {
119 dma_unmap_page(pdev, dma_unmap_addr(&array[index], dma_addr),
120 skb_frag_size(&skb_shinfo(skb)->frags[j]), DMA_TO_DEVICE);
121 dma_unmap_addr_set(&array[index], dma_addr, 0);
122 BNA_QE_INDX_ADD(index, 1, depth);
123 }
124
125 return index;
126 }
127
128 /*
129 * Frees all pending Tx Bufs
130 * At this point no activity is expected on the Q,
131 * so DMA unmap & freeing is fine.
132 */
133 static void
134 bnad_free_all_txbufs(struct bnad *bnad,
135 struct bna_tcb *tcb)
136 {
137 u32 unmap_cons;
138 struct bnad_unmap_q *unmap_q = tcb->unmap_q;
139 struct bnad_skb_unmap *unmap_array;
140 struct sk_buff *skb = NULL;
141 int q;
142
143 unmap_array = unmap_q->unmap_array;
144
145 for (q = 0; q < unmap_q->q_depth; q++) {
146 skb = unmap_array[q].skb;
147 if (!skb)
148 continue;
149
150 unmap_cons = q;
151 unmap_cons = bnad_pci_unmap_skb(&bnad->pcidev->dev, unmap_array,
152 unmap_cons, unmap_q->q_depth, skb,
153 skb_shinfo(skb)->nr_frags);
154
155 dev_kfree_skb_any(skb);
156 }
157 }
158
159 /* Data Path Handlers */
160
161 /*
162 * bnad_free_txbufs : Frees the Tx bufs on Tx completion
163 * Can be called in a) Interrupt context
164 * b) Sending context
165 * c) Tasklet context
166 */
167 static u32
168 bnad_free_txbufs(struct bnad *bnad,
169 struct bna_tcb *tcb)
170 {
171 u32 unmap_cons, sent_packets = 0, sent_bytes = 0;
172 u16 wis, updated_hw_cons;
173 struct bnad_unmap_q *unmap_q = tcb->unmap_q;
174 struct bnad_skb_unmap *unmap_array;
175 struct sk_buff *skb;
176
177 /*
178 * Just return if TX is stopped. This check is useful
179 * when bnad_free_txbufs() runs out of a tasklet scheduled
180 * before bnad_cb_tx_cleanup() cleared BNAD_TXQ_TX_STARTED bit
181 * but this routine runs actually after the cleanup has been
182 * executed.
183 */
184 if (!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))
185 return 0;
186
187 updated_hw_cons = *(tcb->hw_consumer_index);
188
189 wis = BNA_Q_INDEX_CHANGE(tcb->consumer_index,
190 updated_hw_cons, tcb->q_depth);
191
192 BUG_ON(!(wis <= BNA_QE_IN_USE_CNT(tcb, tcb->q_depth)));
193
194 unmap_array = unmap_q->unmap_array;
195 unmap_cons = unmap_q->consumer_index;
196
197 prefetch(&unmap_array[unmap_cons + 1]);
198 while (wis) {
199 skb = unmap_array[unmap_cons].skb;
200
201 sent_packets++;
202 sent_bytes += skb->len;
203 wis -= BNA_TXQ_WI_NEEDED(1 + skb_shinfo(skb)->nr_frags);
204
205 unmap_cons = bnad_pci_unmap_skb(&bnad->pcidev->dev, unmap_array,
206 unmap_cons, unmap_q->q_depth, skb,
207 skb_shinfo(skb)->nr_frags);
208
209 dev_kfree_skb_any(skb);
210 }
211
212 /* Update consumer pointers. */
213 tcb->consumer_index = updated_hw_cons;
214 unmap_q->consumer_index = unmap_cons;
215
216 tcb->txq->tx_packets += sent_packets;
217 tcb->txq->tx_bytes += sent_bytes;
218
219 return sent_packets;
220 }
221
222 /* Tx Free Tasklet function */
223 /* Frees for all the tcb's in all the Tx's */
224 /*
225 * Scheduled from sending context, so that
226 * the fat Tx lock is not held for too long
227 * in the sending context.
228 */
229 static void
230 bnad_tx_free_tasklet(unsigned long bnad_ptr)
231 {
232 struct bnad *bnad = (struct bnad *)bnad_ptr;
233 struct bna_tcb *tcb;
234 u32 acked = 0;
235 int i, j;
236
237 for (i = 0; i < bnad->num_tx; i++) {
238 for (j = 0; j < bnad->num_txq_per_tx; j++) {
239 tcb = bnad->tx_info[i].tcb[j];
240 if (!tcb)
241 continue;
242 if (((u16) (*tcb->hw_consumer_index) !=
243 tcb->consumer_index) &&
244 (!test_and_set_bit(BNAD_TXQ_FREE_SENT,
245 &tcb->flags))) {
246 acked = bnad_free_txbufs(bnad, tcb);
247 if (likely(test_bit(BNAD_TXQ_TX_STARTED,
248 &tcb->flags)))
249 bna_ib_ack(tcb->i_dbell, acked);
250 smp_mb__before_clear_bit();
251 clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
252 }
253 if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED,
254 &tcb->flags)))
255 continue;
256 if (netif_queue_stopped(bnad->netdev)) {
257 if (acked && netif_carrier_ok(bnad->netdev) &&
258 BNA_QE_FREE_CNT(tcb, tcb->q_depth) >=
259 BNAD_NETIF_WAKE_THRESHOLD) {
260 netif_wake_queue(bnad->netdev);
261 /* TODO */
262 /* Counters for individual TxQs? */
263 BNAD_UPDATE_CTR(bnad,
264 netif_queue_wakeup);
265 }
266 }
267 }
268 }
269 }
270
271 static u32
272 bnad_tx(struct bnad *bnad, struct bna_tcb *tcb)
273 {
274 struct net_device *netdev = bnad->netdev;
275 u32 sent = 0;
276
277 if (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
278 return 0;
279
280 sent = bnad_free_txbufs(bnad, tcb);
281 if (sent) {
282 if (netif_queue_stopped(netdev) &&
283 netif_carrier_ok(netdev) &&
284 BNA_QE_FREE_CNT(tcb, tcb->q_depth) >=
285 BNAD_NETIF_WAKE_THRESHOLD) {
286 if (test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)) {
287 netif_wake_queue(netdev);
288 BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
289 }
290 }
291 }
292
293 if (likely(test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
294 bna_ib_ack(tcb->i_dbell, sent);
295
296 smp_mb__before_clear_bit();
297 clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
298
299 return sent;
300 }
301
302 /* MSIX Tx Completion Handler */
303 static irqreturn_t
304 bnad_msix_tx(int irq, void *data)
305 {
306 struct bna_tcb *tcb = (struct bna_tcb *)data;
307 struct bnad *bnad = tcb->bnad;
308
309 bnad_tx(bnad, tcb);
310
311 return IRQ_HANDLED;
312 }
313
314 static void
315 bnad_reset_rcb(struct bnad *bnad, struct bna_rcb *rcb)
316 {
317 struct bnad_unmap_q *unmap_q = rcb->unmap_q;
318
319 rcb->producer_index = 0;
320 rcb->consumer_index = 0;
321
322 unmap_q->producer_index = 0;
323 unmap_q->consumer_index = 0;
324 }
325
326 static void
327 bnad_free_all_rxbufs(struct bnad *bnad, struct bna_rcb *rcb)
328 {
329 struct bnad_unmap_q *unmap_q;
330 struct bnad_skb_unmap *unmap_array;
331 struct sk_buff *skb;
332 int unmap_cons;
333
334 unmap_q = rcb->unmap_q;
335 unmap_array = unmap_q->unmap_array;
336 for (unmap_cons = 0; unmap_cons < unmap_q->q_depth; unmap_cons++) {
337 skb = unmap_array[unmap_cons].skb;
338 if (!skb)
339 continue;
340 unmap_array[unmap_cons].skb = NULL;
341 dma_unmap_single(&bnad->pcidev->dev,
342 dma_unmap_addr(&unmap_array[unmap_cons],
343 dma_addr),
344 rcb->rxq->buffer_size,
345 DMA_FROM_DEVICE);
346 dev_kfree_skb(skb);
347 }
348 bnad_reset_rcb(bnad, rcb);
349 }
350
351 static void
352 bnad_alloc_n_post_rxbufs(struct bnad *bnad, struct bna_rcb *rcb)
353 {
354 u16 to_alloc, alloced, unmap_prod, wi_range;
355 struct bnad_unmap_q *unmap_q = rcb->unmap_q;
356 struct bnad_skb_unmap *unmap_array;
357 struct bna_rxq_entry *rxent;
358 struct sk_buff *skb;
359 dma_addr_t dma_addr;
360
361 alloced = 0;
362 to_alloc =
363 BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth);
364
365 unmap_array = unmap_q->unmap_array;
366 unmap_prod = unmap_q->producer_index;
367
368 BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent, wi_range);
369
370 while (to_alloc--) {
371 if (!wi_range)
372 BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent,
373 wi_range);
374 skb = netdev_alloc_skb_ip_align(bnad->netdev,
375 rcb->rxq->buffer_size);
376 if (unlikely(!skb)) {
377 BNAD_UPDATE_CTR(bnad, rxbuf_alloc_failed);
378 rcb->rxq->rxbuf_alloc_failed++;
379 goto finishing;
380 }
381 unmap_array[unmap_prod].skb = skb;
382 dma_addr = dma_map_single(&bnad->pcidev->dev, skb->data,
383 rcb->rxq->buffer_size,
384 DMA_FROM_DEVICE);
385 dma_unmap_addr_set(&unmap_array[unmap_prod], dma_addr,
386 dma_addr);
387 BNA_SET_DMA_ADDR(dma_addr, &rxent->host_addr);
388 BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);
389
390 rxent++;
391 wi_range--;
392 alloced++;
393 }
394
395 finishing:
396 if (likely(alloced)) {
397 unmap_q->producer_index = unmap_prod;
398 rcb->producer_index = unmap_prod;
399 smp_mb();
400 if (likely(test_bit(BNAD_RXQ_POST_OK, &rcb->flags)))
401 bna_rxq_prod_indx_doorbell(rcb);
402 }
403 }
404
405 static inline void
406 bnad_refill_rxq(struct bnad *bnad, struct bna_rcb *rcb)
407 {
408 struct bnad_unmap_q *unmap_q = rcb->unmap_q;
409
410 if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) {
411 if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth)
412 >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT)
413 bnad_alloc_n_post_rxbufs(bnad, rcb);
414 smp_mb__before_clear_bit();
415 clear_bit(BNAD_RXQ_REFILL, &rcb->flags);
416 }
417 }
418
419 static u32
420 bnad_poll_cq(struct bnad *bnad, struct bna_ccb *ccb, int budget)
421 {
422 struct bna_cq_entry *cmpl, *next_cmpl;
423 struct bna_rcb *rcb = NULL;
424 unsigned int wi_range, packets = 0, wis = 0;
425 struct bnad_unmap_q *unmap_q;
426 struct bnad_skb_unmap *unmap_array;
427 struct sk_buff *skb;
428 u32 flags, unmap_cons;
429 struct bna_pkt_rate *pkt_rt = &ccb->pkt_rate;
430 struct bnad_rx_ctrl *rx_ctrl = (struct bnad_rx_ctrl *)(ccb->ctrl);
431
432 set_bit(BNAD_FP_IN_RX_PATH, &rx_ctrl->flags);
433
434 if (!test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags)) {
435 clear_bit(BNAD_FP_IN_RX_PATH, &rx_ctrl->flags);
436 return 0;
437 }
438
439 prefetch(bnad->netdev);
440 BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt, cmpl,
441 wi_range);
442 BUG_ON(!(wi_range <= ccb->q_depth));
443 while (cmpl->valid && packets < budget) {
444 packets++;
445 BNA_UPDATE_PKT_CNT(pkt_rt, ntohs(cmpl->length));
446
447 if (bna_is_small_rxq(cmpl->rxq_id))
448 rcb = ccb->rcb[1];
449 else
450 rcb = ccb->rcb[0];
451
452 unmap_q = rcb->unmap_q;
453 unmap_array = unmap_q->unmap_array;
454 unmap_cons = unmap_q->consumer_index;
455
456 skb = unmap_array[unmap_cons].skb;
457 BUG_ON(!(skb));
458 unmap_array[unmap_cons].skb = NULL;
459 dma_unmap_single(&bnad->pcidev->dev,
460 dma_unmap_addr(&unmap_array[unmap_cons],
461 dma_addr),
462 rcb->rxq->buffer_size,
463 DMA_FROM_DEVICE);
464 BNA_QE_INDX_ADD(unmap_q->consumer_index, 1, unmap_q->q_depth);
465
466 /* Should be more efficient ? Performance ? */
467 BNA_QE_INDX_ADD(rcb->consumer_index, 1, rcb->q_depth);
468
469 wis++;
470 if (likely(--wi_range))
471 next_cmpl = cmpl + 1;
472 else {
473 BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth);
474 wis = 0;
475 BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt,
476 next_cmpl, wi_range);
477 BUG_ON(!(wi_range <= ccb->q_depth));
478 }
479 prefetch(next_cmpl);
480
481 flags = ntohl(cmpl->flags);
482 if (unlikely
483 (flags &
484 (BNA_CQ_EF_MAC_ERROR | BNA_CQ_EF_FCS_ERROR |
485 BNA_CQ_EF_TOO_LONG))) {
486 dev_kfree_skb_any(skb);
487 rcb->rxq->rx_packets_with_error++;
488 goto next;
489 }
490
491 skb_put(skb, ntohs(cmpl->length));
492 if (likely
493 ((bnad->netdev->features & NETIF_F_RXCSUM) &&
494 (((flags & BNA_CQ_EF_IPV4) &&
495 (flags & BNA_CQ_EF_L3_CKSUM_OK)) ||
496 (flags & BNA_CQ_EF_IPV6)) &&
497 (flags & (BNA_CQ_EF_TCP | BNA_CQ_EF_UDP)) &&
498 (flags & BNA_CQ_EF_L4_CKSUM_OK)))
499 skb->ip_summed = CHECKSUM_UNNECESSARY;
500 else
501 skb_checksum_none_assert(skb);
502
503 rcb->rxq->rx_packets++;
504 rcb->rxq->rx_bytes += skb->len;
505 skb->protocol = eth_type_trans(skb, bnad->netdev);
506
507 if (flags & BNA_CQ_EF_VLAN)
508 __vlan_hwaccel_put_tag(skb, ntohs(cmpl->vlan_tag));
509
510 if (skb->ip_summed == CHECKSUM_UNNECESSARY)
511 napi_gro_receive(&rx_ctrl->napi, skb);
512 else {
513 netif_receive_skb(skb);
514 }
515
516 next:
517 cmpl->valid = 0;
518 cmpl = next_cmpl;
519 }
520
521 BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth);
522
523 if (likely(test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags)))
524 bna_ib_ack_disable_irq(ccb->i_dbell, packets);
525
526 bnad_refill_rxq(bnad, ccb->rcb[0]);
527 if (ccb->rcb[1])
528 bnad_refill_rxq(bnad, ccb->rcb[1]);
529
530 clear_bit(BNAD_FP_IN_RX_PATH, &rx_ctrl->flags);
531
532 return packets;
533 }
534
535 static void
536 bnad_netif_rx_schedule_poll(struct bnad *bnad, struct bna_ccb *ccb)
537 {
538 struct bnad_rx_ctrl *rx_ctrl = (struct bnad_rx_ctrl *)(ccb->ctrl);
539 struct napi_struct *napi = &rx_ctrl->napi;
540
541 if (likely(napi_schedule_prep(napi))) {
542 __napi_schedule(napi);
543 rx_ctrl->rx_schedule++;
544 }
545 }
546
547 /* MSIX Rx Path Handler */
548 static irqreturn_t
549 bnad_msix_rx(int irq, void *data)
550 {
551 struct bna_ccb *ccb = (struct bna_ccb *)data;
552
553 if (ccb) {
554 ((struct bnad_rx_ctrl *)(ccb->ctrl))->rx_intr_ctr++;
555 bnad_netif_rx_schedule_poll(ccb->bnad, ccb);
556 }
557
558 return IRQ_HANDLED;
559 }
560
561 /* Interrupt handlers */
562
563 /* Mbox Interrupt Handlers */
564 static irqreturn_t
565 bnad_msix_mbox_handler(int irq, void *data)
566 {
567 u32 intr_status;
568 unsigned long flags;
569 struct bnad *bnad = (struct bnad *)data;
570
571 spin_lock_irqsave(&bnad->bna_lock, flags);
572 if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags))) {
573 spin_unlock_irqrestore(&bnad->bna_lock, flags);
574 return IRQ_HANDLED;
575 }
576
577 bna_intr_status_get(&bnad->bna, intr_status);
578
579 if (BNA_IS_MBOX_ERR_INTR(&bnad->bna, intr_status))
580 bna_mbox_handler(&bnad->bna, intr_status);
581
582 spin_unlock_irqrestore(&bnad->bna_lock, flags);
583
584 return IRQ_HANDLED;
585 }
586
587 static irqreturn_t
588 bnad_isr(int irq, void *data)
589 {
590 int i, j;
591 u32 intr_status;
592 unsigned long flags;
593 struct bnad *bnad = (struct bnad *)data;
594 struct bnad_rx_info *rx_info;
595 struct bnad_rx_ctrl *rx_ctrl;
596 struct bna_tcb *tcb = NULL;
597
598 spin_lock_irqsave(&bnad->bna_lock, flags);
599 if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags))) {
600 spin_unlock_irqrestore(&bnad->bna_lock, flags);
601 return IRQ_NONE;
602 }
603
604 bna_intr_status_get(&bnad->bna, intr_status);
605
606 if (unlikely(!intr_status)) {
607 spin_unlock_irqrestore(&bnad->bna_lock, flags);
608 return IRQ_NONE;
609 }
610
611 if (BNA_IS_MBOX_ERR_INTR(&bnad->bna, intr_status))
612 bna_mbox_handler(&bnad->bna, intr_status);
613
614 spin_unlock_irqrestore(&bnad->bna_lock, flags);
615
616 if (!BNA_IS_INTX_DATA_INTR(intr_status))
617 return IRQ_HANDLED;
618
619 /* Process data interrupts */
620 /* Tx processing */
621 for (i = 0; i < bnad->num_tx; i++) {
622 for (j = 0; j < bnad->num_txq_per_tx; j++) {
623 tcb = bnad->tx_info[i].tcb[j];
624 if (tcb && test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))
625 bnad_tx(bnad, bnad->tx_info[i].tcb[j]);
626 }
627 }
628 /* Rx processing */
629 for (i = 0; i < bnad->num_rx; i++) {
630 rx_info = &bnad->rx_info[i];
631 if (!rx_info->rx)
632 continue;
633 for (j = 0; j < bnad->num_rxp_per_rx; j++) {
634 rx_ctrl = &rx_info->rx_ctrl[j];
635 if (rx_ctrl->ccb)
636 bnad_netif_rx_schedule_poll(bnad,
637 rx_ctrl->ccb);
638 }
639 }
640 return IRQ_HANDLED;
641 }
642
643 /*
644 * Called in interrupt / callback context
645 * with bna_lock held, so cfg_flags access is OK
646 */
647 static void
648 bnad_enable_mbox_irq(struct bnad *bnad)
649 {
650 clear_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);
651
652 BNAD_UPDATE_CTR(bnad, mbox_intr_enabled);
653 }
654
655 /*
656 * Called with bnad->bna_lock held b'cos of
657 * bnad->cfg_flags access.
658 */
659 static void
660 bnad_disable_mbox_irq(struct bnad *bnad)
661 {
662 set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);
663
664 BNAD_UPDATE_CTR(bnad, mbox_intr_disabled);
665 }
666
667 static void
668 bnad_set_netdev_perm_addr(struct bnad *bnad)
669 {
670 struct net_device *netdev = bnad->netdev;
671
672 memcpy(netdev->perm_addr, &bnad->perm_addr, netdev->addr_len);
673 if (is_zero_ether_addr(netdev->dev_addr))
674 memcpy(netdev->dev_addr, &bnad->perm_addr, netdev->addr_len);
675 }
676
677 /* Control Path Handlers */
678
679 /* Callbacks */
680 void
681 bnad_cb_mbox_intr_enable(struct bnad *bnad)
682 {
683 bnad_enable_mbox_irq(bnad);
684 }
685
686 void
687 bnad_cb_mbox_intr_disable(struct bnad *bnad)
688 {
689 bnad_disable_mbox_irq(bnad);
690 }
691
692 void
693 bnad_cb_ioceth_ready(struct bnad *bnad)
694 {
695 bnad->bnad_completions.ioc_comp_status = BNA_CB_SUCCESS;
696 complete(&bnad->bnad_completions.ioc_comp);
697 }
698
699 void
700 bnad_cb_ioceth_failed(struct bnad *bnad)
701 {
702 bnad->bnad_completions.ioc_comp_status = BNA_CB_FAIL;
703 complete(&bnad->bnad_completions.ioc_comp);
704 }
705
706 void
707 bnad_cb_ioceth_disabled(struct bnad *bnad)
708 {
709 bnad->bnad_completions.ioc_comp_status = BNA_CB_SUCCESS;
710 complete(&bnad->bnad_completions.ioc_comp);
711 }
712
713 static void
714 bnad_cb_enet_disabled(void *arg)
715 {
716 struct bnad *bnad = (struct bnad *)arg;
717
718 netif_carrier_off(bnad->netdev);
719 complete(&bnad->bnad_completions.enet_comp);
720 }
721
722 void
723 bnad_cb_ethport_link_status(struct bnad *bnad,
724 enum bna_link_status link_status)
725 {
726 bool link_up = 0;
727
728 link_up = (link_status == BNA_LINK_UP) || (link_status == BNA_CEE_UP);
729
730 if (link_status == BNA_CEE_UP) {
731 if (!test_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags))
732 BNAD_UPDATE_CTR(bnad, cee_toggle);
733 set_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags);
734 } else {
735 if (test_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags))
736 BNAD_UPDATE_CTR(bnad, cee_toggle);
737 clear_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags);
738 }
739
740 if (link_up) {
741 if (!netif_carrier_ok(bnad->netdev)) {
742 uint tx_id, tcb_id;
743 printk(KERN_WARNING "bna: %s link up\n",
744 bnad->netdev->name);
745 netif_carrier_on(bnad->netdev);
746 BNAD_UPDATE_CTR(bnad, link_toggle);
747 for (tx_id = 0; tx_id < bnad->num_tx; tx_id++) {
748 for (tcb_id = 0; tcb_id < bnad->num_txq_per_tx;
749 tcb_id++) {
750 struct bna_tcb *tcb =
751 bnad->tx_info[tx_id].tcb[tcb_id];
752 u32 txq_id;
753 if (!tcb)
754 continue;
755
756 txq_id = tcb->id;
757
758 if (test_bit(BNAD_TXQ_TX_STARTED,
759 &tcb->flags)) {
760 /*
761 * Force an immediate
762 * Transmit Schedule */
763 printk(KERN_INFO "bna: %s %d "
764 "TXQ_STARTED\n",
765 bnad->netdev->name,
766 txq_id);
767 netif_wake_subqueue(
768 bnad->netdev,
769 txq_id);
770 BNAD_UPDATE_CTR(bnad,
771 netif_queue_wakeup);
772 } else {
773 netif_stop_subqueue(
774 bnad->netdev,
775 txq_id);
776 BNAD_UPDATE_CTR(bnad,
777 netif_queue_stop);
778 }
779 }
780 }
781 }
782 } else {
783 if (netif_carrier_ok(bnad->netdev)) {
784 printk(KERN_WARNING "bna: %s link down\n",
785 bnad->netdev->name);
786 netif_carrier_off(bnad->netdev);
787 BNAD_UPDATE_CTR(bnad, link_toggle);
788 }
789 }
790 }
791
792 static void
793 bnad_cb_tx_disabled(void *arg, struct bna_tx *tx)
794 {
795 struct bnad *bnad = (struct bnad *)arg;
796
797 complete(&bnad->bnad_completions.tx_comp);
798 }
799
800 static void
801 bnad_cb_tcb_setup(struct bnad *bnad, struct bna_tcb *tcb)
802 {
803 struct bnad_tx_info *tx_info =
804 (struct bnad_tx_info *)tcb->txq->tx->priv;
805 struct bnad_unmap_q *unmap_q = tcb->unmap_q;
806
807 tx_info->tcb[tcb->id] = tcb;
808 unmap_q->producer_index = 0;
809 unmap_q->consumer_index = 0;
810 unmap_q->q_depth = BNAD_TX_UNMAPQ_DEPTH;
811 }
812
813 static void
814 bnad_cb_tcb_destroy(struct bnad *bnad, struct bna_tcb *tcb)
815 {
816 struct bnad_tx_info *tx_info =
817 (struct bnad_tx_info *)tcb->txq->tx->priv;
818 struct bnad_unmap_q *unmap_q = tcb->unmap_q;
819
820 while (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
821 cpu_relax();
822
823 bnad_free_all_txbufs(bnad, tcb);
824
825 unmap_q->producer_index = 0;
826 unmap_q->consumer_index = 0;
827
828 smp_mb__before_clear_bit();
829 clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
830
831 tx_info->tcb[tcb->id] = NULL;
832 }
833
834 static void
835 bnad_cb_rcb_setup(struct bnad *bnad, struct bna_rcb *rcb)
836 {
837 struct bnad_unmap_q *unmap_q = rcb->unmap_q;
838
839 unmap_q->producer_index = 0;
840 unmap_q->consumer_index = 0;
841 unmap_q->q_depth = BNAD_RX_UNMAPQ_DEPTH;
842 }
843
844 static void
845 bnad_cb_rcb_destroy(struct bnad *bnad, struct bna_rcb *rcb)
846 {
847 bnad_free_all_rxbufs(bnad, rcb);
848 }
849
850 static void
851 bnad_cb_ccb_setup(struct bnad *bnad, struct bna_ccb *ccb)
852 {
853 struct bnad_rx_info *rx_info =
854 (struct bnad_rx_info *)ccb->cq->rx->priv;
855
856 rx_info->rx_ctrl[ccb->id].ccb = ccb;
857 ccb->ctrl = &rx_info->rx_ctrl[ccb->id];
858 }
859
860 static void
861 bnad_cb_ccb_destroy(struct bnad *bnad, struct bna_ccb *ccb)
862 {
863 struct bnad_rx_info *rx_info =
864 (struct bnad_rx_info *)ccb->cq->rx->priv;
865
866 rx_info->rx_ctrl[ccb->id].ccb = NULL;
867 }
868
869 static void
870 bnad_cb_tx_stall(struct bnad *bnad, struct bna_tx *tx)
871 {
872 struct bnad_tx_info *tx_info =
873 (struct bnad_tx_info *)tx->priv;
874 struct bna_tcb *tcb;
875 u32 txq_id;
876 int i;
877
878 for (i = 0; i < BNAD_MAX_TXQ_PER_TX; i++) {
879 tcb = tx_info->tcb[i];
880 if (!tcb)
881 continue;
882 txq_id = tcb->id;
883 clear_bit(BNAD_TXQ_TX_STARTED, &tcb->flags);
884 netif_stop_subqueue(bnad->netdev, txq_id);
885 printk(KERN_INFO "bna: %s %d TXQ_STOPPED\n",
886 bnad->netdev->name, txq_id);
887 }
888 }
889
890 static void
891 bnad_cb_tx_resume(struct bnad *bnad, struct bna_tx *tx)
892 {
893 struct bnad_tx_info *tx_info = (struct bnad_tx_info *)tx->priv;
894 struct bna_tcb *tcb;
895 struct bnad_unmap_q *unmap_q;
896 u32 txq_id;
897 int i;
898
899 for (i = 0; i < BNAD_MAX_TXQ_PER_TX; i++) {
900 tcb = tx_info->tcb[i];
901 if (!tcb)
902 continue;
903 txq_id = tcb->id;
904
905 unmap_q = tcb->unmap_q;
906
907 if (test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))
908 continue;
909
910 while (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
911 cpu_relax();
912
913 bnad_free_all_txbufs(bnad, tcb);
914
915 unmap_q->producer_index = 0;
916 unmap_q->consumer_index = 0;
917
918 smp_mb__before_clear_bit();
919 clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
920
921 set_bit(BNAD_TXQ_TX_STARTED, &tcb->flags);
922
923 if (netif_carrier_ok(bnad->netdev)) {
924 printk(KERN_INFO "bna: %s %d TXQ_STARTED\n",
925 bnad->netdev->name, txq_id);
926 netif_wake_subqueue(bnad->netdev, txq_id);
927 BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
928 }
929 }
930
931 /*
932 * Workaround for first ioceth enable failure & we
933 * get a 0 MAC address. We try to get the MAC address
934 * again here.
935 */
936 if (is_zero_ether_addr(&bnad->perm_addr.mac[0])) {
937 bna_enet_perm_mac_get(&bnad->bna.enet, &bnad->perm_addr);
938 bnad_set_netdev_perm_addr(bnad);
939 }
940 }
941
942 static void
943 bnad_cb_tx_cleanup(struct bnad *bnad, struct bna_tx *tx)
944 {
945 struct bnad_tx_info *tx_info = (struct bnad_tx_info *)tx->priv;
946 struct bna_tcb *tcb;
947 int i;
948
949 for (i = 0; i < BNAD_MAX_TXQ_PER_TX; i++) {
950 tcb = tx_info->tcb[i];
951 if (!tcb)
952 continue;
953 }
954
955 mdelay(BNAD_TXRX_SYNC_MDELAY);
956 bna_tx_cleanup_complete(tx);
957 }
958
959 static void
960 bnad_cb_rx_stall(struct bnad *bnad, struct bna_rx *rx)
961 {
962 struct bnad_rx_info *rx_info = (struct bnad_rx_info *)rx->priv;
963 struct bna_ccb *ccb;
964 struct bnad_rx_ctrl *rx_ctrl;
965 int i;
966
967 for (i = 0; i < BNAD_MAX_RXP_PER_RX; i++) {
968 rx_ctrl = &rx_info->rx_ctrl[i];
969 ccb = rx_ctrl->ccb;
970 if (!ccb)
971 continue;
972
973 clear_bit(BNAD_RXQ_POST_OK, &ccb->rcb[0]->flags);
974
975 if (ccb->rcb[1])
976 clear_bit(BNAD_RXQ_POST_OK, &ccb->rcb[1]->flags);
977 }
978 }
979
980 static void
981 bnad_cb_rx_cleanup(struct bnad *bnad, struct bna_rx *rx)
982 {
983 struct bnad_rx_info *rx_info = (struct bnad_rx_info *)rx->priv;
984 struct bna_ccb *ccb;
985 struct bnad_rx_ctrl *rx_ctrl;
986 int i;
987
988 mdelay(BNAD_TXRX_SYNC_MDELAY);
989
990 for (i = 0; i < BNAD_MAX_RXP_PER_RX; i++) {
991 rx_ctrl = &rx_info->rx_ctrl[i];
992 ccb = rx_ctrl->ccb;
993 if (!ccb)
994 continue;
995
996 clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags);
997
998 if (ccb->rcb[1])
999 clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[1]->flags);
1000
1001 while (test_bit(BNAD_FP_IN_RX_PATH, &rx_ctrl->flags))
1002 cpu_relax();
1003 }
1004
1005 bna_rx_cleanup_complete(rx);
1006 }
1007
1008 static void
1009 bnad_cb_rx_post(struct bnad *bnad, struct bna_rx *rx)
1010 {
1011 struct bnad_rx_info *rx_info = (struct bnad_rx_info *)rx->priv;
1012 struct bna_ccb *ccb;
1013 struct bna_rcb *rcb;
1014 struct bnad_rx_ctrl *rx_ctrl;
1015 struct bnad_unmap_q *unmap_q;
1016 int i;
1017 int j;
1018
1019 for (i = 0; i < BNAD_MAX_RXP_PER_RX; i++) {
1020 rx_ctrl = &rx_info->rx_ctrl[i];
1021 ccb = rx_ctrl->ccb;
1022 if (!ccb)
1023 continue;
1024
1025 bnad_cq_cmpl_init(bnad, ccb);
1026
1027 for (j = 0; j < BNAD_MAX_RXQ_PER_RXP; j++) {
1028 rcb = ccb->rcb[j];
1029 if (!rcb)
1030 continue;
1031 bnad_free_all_rxbufs(bnad, rcb);
1032
1033 set_bit(BNAD_RXQ_STARTED, &rcb->flags);
1034 set_bit(BNAD_RXQ_POST_OK, &rcb->flags);
1035 unmap_q = rcb->unmap_q;
1036
1037 /* Now allocate & post buffers for this RCB */
1038 /* !!Allocation in callback context */
1039 if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) {
1040 if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth)
1041 >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT)
1042 bnad_alloc_n_post_rxbufs(bnad, rcb);
1043 smp_mb__before_clear_bit();
1044 clear_bit(BNAD_RXQ_REFILL, &rcb->flags);
1045 }
1046 }
1047 }
1048 }
1049
1050 static void
1051 bnad_cb_rx_disabled(void *arg, struct bna_rx *rx)
1052 {
1053 struct bnad *bnad = (struct bnad *)arg;
1054
1055 complete(&bnad->bnad_completions.rx_comp);
1056 }
1057
1058 static void
1059 bnad_cb_rx_mcast_add(struct bnad *bnad, struct bna_rx *rx)
1060 {
1061 bnad->bnad_completions.mcast_comp_status = BNA_CB_SUCCESS;
1062 complete(&bnad->bnad_completions.mcast_comp);
1063 }
1064
1065 void
1066 bnad_cb_stats_get(struct bnad *bnad, enum bna_cb_status status,
1067 struct bna_stats *stats)
1068 {
1069 if (status == BNA_CB_SUCCESS)
1070 BNAD_UPDATE_CTR(bnad, hw_stats_updates);
1071
1072 if (!netif_running(bnad->netdev) ||
1073 !test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
1074 return;
1075
1076 mod_timer(&bnad->stats_timer,
1077 jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ));
1078 }
1079
1080 static void
1081 bnad_cb_enet_mtu_set(struct bnad *bnad)
1082 {
1083 bnad->bnad_completions.mtu_comp_status = BNA_CB_SUCCESS;
1084 complete(&bnad->bnad_completions.mtu_comp);
1085 }
1086
1087 /* Resource allocation, free functions */
1088
1089 static void
1090 bnad_mem_free(struct bnad *bnad,
1091 struct bna_mem_info *mem_info)
1092 {
1093 int i;
1094 dma_addr_t dma_pa;
1095
1096 if (mem_info->mdl == NULL)
1097 return;
1098
1099 for (i = 0; i < mem_info->num; i++) {
1100 if (mem_info->mdl[i].kva != NULL) {
1101 if (mem_info->mem_type == BNA_MEM_T_DMA) {
1102 BNA_GET_DMA_ADDR(&(mem_info->mdl[i].dma),
1103 dma_pa);
1104 dma_free_coherent(&bnad->pcidev->dev,
1105 mem_info->mdl[i].len,
1106 mem_info->mdl[i].kva, dma_pa);
1107 } else
1108 kfree(mem_info->mdl[i].kva);
1109 }
1110 }
1111 kfree(mem_info->mdl);
1112 mem_info->mdl = NULL;
1113 }
1114
1115 static int
1116 bnad_mem_alloc(struct bnad *bnad,
1117 struct bna_mem_info *mem_info)
1118 {
1119 int i;
1120 dma_addr_t dma_pa;
1121
1122 if ((mem_info->num == 0) || (mem_info->len == 0)) {
1123 mem_info->mdl = NULL;
1124 return 0;
1125 }
1126
1127 mem_info->mdl = kcalloc(mem_info->num, sizeof(struct bna_mem_descr),
1128 GFP_KERNEL);
1129 if (mem_info->mdl == NULL)
1130 return -ENOMEM;
1131
1132 if (mem_info->mem_type == BNA_MEM_T_DMA) {
1133 for (i = 0; i < mem_info->num; i++) {
1134 mem_info->mdl[i].len = mem_info->len;
1135 mem_info->mdl[i].kva =
1136 dma_alloc_coherent(&bnad->pcidev->dev,
1137 mem_info->len, &dma_pa,
1138 GFP_KERNEL);
1139
1140 if (mem_info->mdl[i].kva == NULL)
1141 goto err_return;
1142
1143 BNA_SET_DMA_ADDR(dma_pa,
1144 &(mem_info->mdl[i].dma));
1145 }
1146 } else {
1147 for (i = 0; i < mem_info->num; i++) {
1148 mem_info->mdl[i].len = mem_info->len;
1149 mem_info->mdl[i].kva = kzalloc(mem_info->len,
1150 GFP_KERNEL);
1151 if (mem_info->mdl[i].kva == NULL)
1152 goto err_return;
1153 }
1154 }
1155
1156 return 0;
1157
1158 err_return:
1159 bnad_mem_free(bnad, mem_info);
1160 return -ENOMEM;
1161 }
1162
1163 /* Free IRQ for Mailbox */
1164 static void
1165 bnad_mbox_irq_free(struct bnad *bnad)
1166 {
1167 int irq;
1168 unsigned long flags;
1169
1170 spin_lock_irqsave(&bnad->bna_lock, flags);
1171 bnad_disable_mbox_irq(bnad);
1172 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1173
1174 irq = BNAD_GET_MBOX_IRQ(bnad);
1175 free_irq(irq, bnad);
1176 }
1177
1178 /*
1179 * Allocates IRQ for Mailbox, but keep it disabled
1180 * This will be enabled once we get the mbox enable callback
1181 * from bna
1182 */
1183 static int
1184 bnad_mbox_irq_alloc(struct bnad *bnad)
1185 {
1186 int err = 0;
1187 unsigned long irq_flags, flags;
1188 u32 irq;
1189 irq_handler_t irq_handler;
1190
1191 spin_lock_irqsave(&bnad->bna_lock, flags);
1192 if (bnad->cfg_flags & BNAD_CF_MSIX) {
1193 irq_handler = (irq_handler_t)bnad_msix_mbox_handler;
1194 irq = bnad->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector;
1195 irq_flags = 0;
1196 } else {
1197 irq_handler = (irq_handler_t)bnad_isr;
1198 irq = bnad->pcidev->irq;
1199 irq_flags = IRQF_SHARED;
1200 }
1201
1202 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1203 sprintf(bnad->mbox_irq_name, "%s", BNAD_NAME);
1204
1205 /*
1206 * Set the Mbox IRQ disable flag, so that the IRQ handler
1207 * called from request_irq() for SHARED IRQs do not execute
1208 */
1209 set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);
1210
1211 BNAD_UPDATE_CTR(bnad, mbox_intr_disabled);
1212
1213 err = request_irq(irq, irq_handler, irq_flags,
1214 bnad->mbox_irq_name, bnad);
1215
1216 return err;
1217 }
1218
1219 static void
1220 bnad_txrx_irq_free(struct bnad *bnad, struct bna_intr_info *intr_info)
1221 {
1222 kfree(intr_info->idl);
1223 intr_info->idl = NULL;
1224 }
1225
1226 /* Allocates Interrupt Descriptor List for MSIX/INT-X vectors */
1227 static int
1228 bnad_txrx_irq_alloc(struct bnad *bnad, enum bnad_intr_source src,
1229 u32 txrx_id, struct bna_intr_info *intr_info)
1230 {
1231 int i, vector_start = 0;
1232 u32 cfg_flags;
1233 unsigned long flags;
1234
1235 spin_lock_irqsave(&bnad->bna_lock, flags);
1236 cfg_flags = bnad->cfg_flags;
1237 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1238
1239 if (cfg_flags & BNAD_CF_MSIX) {
1240 intr_info->intr_type = BNA_INTR_T_MSIX;
1241 intr_info->idl = kcalloc(intr_info->num,
1242 sizeof(struct bna_intr_descr),
1243 GFP_KERNEL);
1244 if (!intr_info->idl)
1245 return -ENOMEM;
1246
1247 switch (src) {
1248 case BNAD_INTR_TX:
1249 vector_start = BNAD_MAILBOX_MSIX_VECTORS + txrx_id;
1250 break;
1251
1252 case BNAD_INTR_RX:
1253 vector_start = BNAD_MAILBOX_MSIX_VECTORS +
1254 (bnad->num_tx * bnad->num_txq_per_tx) +
1255 txrx_id;
1256 break;
1257
1258 default:
1259 BUG();
1260 }
1261
1262 for (i = 0; i < intr_info->num; i++)
1263 intr_info->idl[i].vector = vector_start + i;
1264 } else {
1265 intr_info->intr_type = BNA_INTR_T_INTX;
1266 intr_info->num = 1;
1267 intr_info->idl = kcalloc(intr_info->num,
1268 sizeof(struct bna_intr_descr),
1269 GFP_KERNEL);
1270 if (!intr_info->idl)
1271 return -ENOMEM;
1272
1273 switch (src) {
1274 case BNAD_INTR_TX:
1275 intr_info->idl[0].vector = BNAD_INTX_TX_IB_BITMASK;
1276 break;
1277
1278 case BNAD_INTR_RX:
1279 intr_info->idl[0].vector = BNAD_INTX_RX_IB_BITMASK;
1280 break;
1281 }
1282 }
1283 return 0;
1284 }
1285
1286 /**
1287 * NOTE: Should be called for MSIX only
1288 * Unregisters Tx MSIX vector(s) from the kernel
1289 */
1290 static void
1291 bnad_tx_msix_unregister(struct bnad *bnad, struct bnad_tx_info *tx_info,
1292 int num_txqs)
1293 {
1294 int i;
1295 int vector_num;
1296
1297 for (i = 0; i < num_txqs; i++) {
1298 if (tx_info->tcb[i] == NULL)
1299 continue;
1300
1301 vector_num = tx_info->tcb[i]->intr_vector;
1302 free_irq(bnad->msix_table[vector_num].vector, tx_info->tcb[i]);
1303 }
1304 }
1305
1306 /**
1307 * NOTE: Should be called for MSIX only
1308 * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel
1309 */
1310 static int
1311 bnad_tx_msix_register(struct bnad *bnad, struct bnad_tx_info *tx_info,
1312 u32 tx_id, int num_txqs)
1313 {
1314 int i;
1315 int err;
1316 int vector_num;
1317
1318 for (i = 0; i < num_txqs; i++) {
1319 vector_num = tx_info->tcb[i]->intr_vector;
1320 sprintf(tx_info->tcb[i]->name, "%s TXQ %d", bnad->netdev->name,
1321 tx_id + tx_info->tcb[i]->id);
1322 err = request_irq(bnad->msix_table[vector_num].vector,
1323 (irq_handler_t)bnad_msix_tx, 0,
1324 tx_info->tcb[i]->name,
1325 tx_info->tcb[i]);
1326 if (err)
1327 goto err_return;
1328 }
1329
1330 return 0;
1331
1332 err_return:
1333 if (i > 0)
1334 bnad_tx_msix_unregister(bnad, tx_info, (i - 1));
1335 return -1;
1336 }
1337
1338 /**
1339 * NOTE: Should be called for MSIX only
1340 * Unregisters Rx MSIX vector(s) from the kernel
1341 */
1342 static void
1343 bnad_rx_msix_unregister(struct bnad *bnad, struct bnad_rx_info *rx_info,
1344 int num_rxps)
1345 {
1346 int i;
1347 int vector_num;
1348
1349 for (i = 0; i < num_rxps; i++) {
1350 if (rx_info->rx_ctrl[i].ccb == NULL)
1351 continue;
1352
1353 vector_num = rx_info->rx_ctrl[i].ccb->intr_vector;
1354 free_irq(bnad->msix_table[vector_num].vector,
1355 rx_info->rx_ctrl[i].ccb);
1356 }
1357 }
1358
1359 /**
1360 * NOTE: Should be called for MSIX only
1361 * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel
1362 */
1363 static int
1364 bnad_rx_msix_register(struct bnad *bnad, struct bnad_rx_info *rx_info,
1365 u32 rx_id, int num_rxps)
1366 {
1367 int i;
1368 int err;
1369 int vector_num;
1370
1371 for (i = 0; i < num_rxps; i++) {
1372 vector_num = rx_info->rx_ctrl[i].ccb->intr_vector;
1373 sprintf(rx_info->rx_ctrl[i].ccb->name, "%s CQ %d",
1374 bnad->netdev->name,
1375 rx_id + rx_info->rx_ctrl[i].ccb->id);
1376 err = request_irq(bnad->msix_table[vector_num].vector,
1377 (irq_handler_t)bnad_msix_rx, 0,
1378 rx_info->rx_ctrl[i].ccb->name,
1379 rx_info->rx_ctrl[i].ccb);
1380 if (err)
1381 goto err_return;
1382 }
1383
1384 return 0;
1385
1386 err_return:
1387 if (i > 0)
1388 bnad_rx_msix_unregister(bnad, rx_info, (i - 1));
1389 return -1;
1390 }
1391
1392 /* Free Tx object Resources */
1393 static void
1394 bnad_tx_res_free(struct bnad *bnad, struct bna_res_info *res_info)
1395 {
1396 int i;
1397
1398 for (i = 0; i < BNA_TX_RES_T_MAX; i++) {
1399 if (res_info[i].res_type == BNA_RES_T_MEM)
1400 bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
1401 else if (res_info[i].res_type == BNA_RES_T_INTR)
1402 bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info);
1403 }
1404 }
1405
1406 /* Allocates memory and interrupt resources for Tx object */
1407 static int
1408 bnad_tx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info,
1409 u32 tx_id)
1410 {
1411 int i, err = 0;
1412
1413 for (i = 0; i < BNA_TX_RES_T_MAX; i++) {
1414 if (res_info[i].res_type == BNA_RES_T_MEM)
1415 err = bnad_mem_alloc(bnad,
1416 &res_info[i].res_u.mem_info);
1417 else if (res_info[i].res_type == BNA_RES_T_INTR)
1418 err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_TX, tx_id,
1419 &res_info[i].res_u.intr_info);
1420 if (err)
1421 goto err_return;
1422 }
1423 return 0;
1424
1425 err_return:
1426 bnad_tx_res_free(bnad, res_info);
1427 return err;
1428 }
1429
1430 /* Free Rx object Resources */
1431 static void
1432 bnad_rx_res_free(struct bnad *bnad, struct bna_res_info *res_info)
1433 {
1434 int i;
1435
1436 for (i = 0; i < BNA_RX_RES_T_MAX; i++) {
1437 if (res_info[i].res_type == BNA_RES_T_MEM)
1438 bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
1439 else if (res_info[i].res_type == BNA_RES_T_INTR)
1440 bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info);
1441 }
1442 }
1443
1444 /* Allocates memory and interrupt resources for Rx object */
1445 static int
1446 bnad_rx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info,
1447 uint rx_id)
1448 {
1449 int i, err = 0;
1450
1451 /* All memory needs to be allocated before setup_ccbs */
1452 for (i = 0; i < BNA_RX_RES_T_MAX; i++) {
1453 if (res_info[i].res_type == BNA_RES_T_MEM)
1454 err = bnad_mem_alloc(bnad,
1455 &res_info[i].res_u.mem_info);
1456 else if (res_info[i].res_type == BNA_RES_T_INTR)
1457 err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_RX, rx_id,
1458 &res_info[i].res_u.intr_info);
1459 if (err)
1460 goto err_return;
1461 }
1462 return 0;
1463
1464 err_return:
1465 bnad_rx_res_free(bnad, res_info);
1466 return err;
1467 }
1468
1469 /* Timer callbacks */
1470 /* a) IOC timer */
1471 static void
1472 bnad_ioc_timeout(unsigned long data)
1473 {
1474 struct bnad *bnad = (struct bnad *)data;
1475 unsigned long flags;
1476
1477 spin_lock_irqsave(&bnad->bna_lock, flags);
1478 bfa_nw_ioc_timeout((void *) &bnad->bna.ioceth.ioc);
1479 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1480 }
1481
1482 static void
1483 bnad_ioc_hb_check(unsigned long data)
1484 {
1485 struct bnad *bnad = (struct bnad *)data;
1486 unsigned long flags;
1487
1488 spin_lock_irqsave(&bnad->bna_lock, flags);
1489 bfa_nw_ioc_hb_check((void *) &bnad->bna.ioceth.ioc);
1490 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1491 }
1492
1493 static void
1494 bnad_iocpf_timeout(unsigned long data)
1495 {
1496 struct bnad *bnad = (struct bnad *)data;
1497 unsigned long flags;
1498
1499 spin_lock_irqsave(&bnad->bna_lock, flags);
1500 bfa_nw_iocpf_timeout((void *) &bnad->bna.ioceth.ioc);
1501 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1502 }
1503
1504 static void
1505 bnad_iocpf_sem_timeout(unsigned long data)
1506 {
1507 struct bnad *bnad = (struct bnad *)data;
1508 unsigned long flags;
1509
1510 spin_lock_irqsave(&bnad->bna_lock, flags);
1511 bfa_nw_iocpf_sem_timeout((void *) &bnad->bna.ioceth.ioc);
1512 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1513 }
1514
1515 /*
1516 * All timer routines use bnad->bna_lock to protect against
1517 * the following race, which may occur in case of no locking:
1518 * Time CPU m CPU n
1519 * 0 1 = test_bit
1520 * 1 clear_bit
1521 * 2 del_timer_sync
1522 * 3 mod_timer
1523 */
1524
1525 /* b) Dynamic Interrupt Moderation Timer */
1526 static void
1527 bnad_dim_timeout(unsigned long data)
1528 {
1529 struct bnad *bnad = (struct bnad *)data;
1530 struct bnad_rx_info *rx_info;
1531 struct bnad_rx_ctrl *rx_ctrl;
1532 int i, j;
1533 unsigned long flags;
1534
1535 if (!netif_carrier_ok(bnad->netdev))
1536 return;
1537
1538 spin_lock_irqsave(&bnad->bna_lock, flags);
1539 for (i = 0; i < bnad->num_rx; i++) {
1540 rx_info = &bnad->rx_info[i];
1541 if (!rx_info->rx)
1542 continue;
1543 for (j = 0; j < bnad->num_rxp_per_rx; j++) {
1544 rx_ctrl = &rx_info->rx_ctrl[j];
1545 if (!rx_ctrl->ccb)
1546 continue;
1547 bna_rx_dim_update(rx_ctrl->ccb);
1548 }
1549 }
1550
1551 /* Check for BNAD_CF_DIM_ENABLED, does not eleminate a race */
1552 if (test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags))
1553 mod_timer(&bnad->dim_timer,
1554 jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ));
1555 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1556 }
1557
1558 /* c) Statistics Timer */
1559 static void
1560 bnad_stats_timeout(unsigned long data)
1561 {
1562 struct bnad *bnad = (struct bnad *)data;
1563 unsigned long flags;
1564
1565 if (!netif_running(bnad->netdev) ||
1566 !test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
1567 return;
1568
1569 spin_lock_irqsave(&bnad->bna_lock, flags);
1570 bna_hw_stats_get(&bnad->bna);
1571 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1572 }
1573
1574 /*
1575 * Set up timer for DIM
1576 * Called with bnad->bna_lock held
1577 */
1578 void
1579 bnad_dim_timer_start(struct bnad *bnad)
1580 {
1581 if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED &&
1582 !test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags)) {
1583 setup_timer(&bnad->dim_timer, bnad_dim_timeout,
1584 (unsigned long)bnad);
1585 set_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags);
1586 mod_timer(&bnad->dim_timer,
1587 jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ));
1588 }
1589 }
1590
1591 /*
1592 * Set up timer for statistics
1593 * Called with mutex_lock(&bnad->conf_mutex) held
1594 */
1595 static void
1596 bnad_stats_timer_start(struct bnad *bnad)
1597 {
1598 unsigned long flags;
1599
1600 spin_lock_irqsave(&bnad->bna_lock, flags);
1601 if (!test_and_set_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) {
1602 setup_timer(&bnad->stats_timer, bnad_stats_timeout,
1603 (unsigned long)bnad);
1604 mod_timer(&bnad->stats_timer,
1605 jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ));
1606 }
1607 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1608 }
1609
1610 /*
1611 * Stops the stats timer
1612 * Called with mutex_lock(&bnad->conf_mutex) held
1613 */
1614 static void
1615 bnad_stats_timer_stop(struct bnad *bnad)
1616 {
1617 int to_del = 0;
1618 unsigned long flags;
1619
1620 spin_lock_irqsave(&bnad->bna_lock, flags);
1621 if (test_and_clear_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
1622 to_del = 1;
1623 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1624 if (to_del)
1625 del_timer_sync(&bnad->stats_timer);
1626 }
1627
1628 /* Utilities */
1629
1630 static void
1631 bnad_netdev_mc_list_get(struct net_device *netdev, u8 *mc_list)
1632 {
1633 int i = 1; /* Index 0 has broadcast address */
1634 struct netdev_hw_addr *mc_addr;
1635
1636 netdev_for_each_mc_addr(mc_addr, netdev) {
1637 memcpy(&mc_list[i * ETH_ALEN], &mc_addr->addr[0],
1638 ETH_ALEN);
1639 i++;
1640 }
1641 }
1642
1643 static int
1644 bnad_napi_poll_rx(struct napi_struct *napi, int budget)
1645 {
1646 struct bnad_rx_ctrl *rx_ctrl =
1647 container_of(napi, struct bnad_rx_ctrl, napi);
1648 struct bnad *bnad = rx_ctrl->bnad;
1649 int rcvd = 0;
1650
1651 rx_ctrl->rx_poll_ctr++;
1652
1653 if (!netif_carrier_ok(bnad->netdev))
1654 goto poll_exit;
1655
1656 rcvd = bnad_poll_cq(bnad, rx_ctrl->ccb, budget);
1657 if (rcvd >= budget)
1658 return rcvd;
1659
1660 poll_exit:
1661 napi_complete(napi);
1662
1663 rx_ctrl->rx_complete++;
1664
1665 if (rx_ctrl->ccb)
1666 bnad_enable_rx_irq_unsafe(rx_ctrl->ccb);
1667
1668 return rcvd;
1669 }
1670
1671 #define BNAD_NAPI_POLL_QUOTA 64
1672 static void
1673 bnad_napi_init(struct bnad *bnad, u32 rx_id)
1674 {
1675 struct bnad_rx_ctrl *rx_ctrl;
1676 int i;
1677
1678 /* Initialize & enable NAPI */
1679 for (i = 0; i < bnad->num_rxp_per_rx; i++) {
1680 rx_ctrl = &bnad->rx_info[rx_id].rx_ctrl[i];
1681 netif_napi_add(bnad->netdev, &rx_ctrl->napi,
1682 bnad_napi_poll_rx, BNAD_NAPI_POLL_QUOTA);
1683 }
1684 }
1685
1686 static void
1687 bnad_napi_enable(struct bnad *bnad, u32 rx_id)
1688 {
1689 struct bnad_rx_ctrl *rx_ctrl;
1690 int i;
1691
1692 /* Initialize & enable NAPI */
1693 for (i = 0; i < bnad->num_rxp_per_rx; i++) {
1694 rx_ctrl = &bnad->rx_info[rx_id].rx_ctrl[i];
1695
1696 napi_enable(&rx_ctrl->napi);
1697 }
1698 }
1699
1700 static void
1701 bnad_napi_disable(struct bnad *bnad, u32 rx_id)
1702 {
1703 int i;
1704
1705 /* First disable and then clean up */
1706 for (i = 0; i < bnad->num_rxp_per_rx; i++) {
1707 napi_disable(&bnad->rx_info[rx_id].rx_ctrl[i].napi);
1708 netif_napi_del(&bnad->rx_info[rx_id].rx_ctrl[i].napi);
1709 }
1710 }
1711
1712 /* Should be held with conf_lock held */
1713 void
1714 bnad_cleanup_tx(struct bnad *bnad, u32 tx_id)
1715 {
1716 struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id];
1717 struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0];
1718 unsigned long flags;
1719
1720 if (!tx_info->tx)
1721 return;
1722
1723 init_completion(&bnad->bnad_completions.tx_comp);
1724 spin_lock_irqsave(&bnad->bna_lock, flags);
1725 bna_tx_disable(tx_info->tx, BNA_HARD_CLEANUP, bnad_cb_tx_disabled);
1726 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1727 wait_for_completion(&bnad->bnad_completions.tx_comp);
1728
1729 if (tx_info->tcb[0]->intr_type == BNA_INTR_T_MSIX)
1730 bnad_tx_msix_unregister(bnad, tx_info,
1731 bnad->num_txq_per_tx);
1732
1733 if (0 == tx_id)
1734 tasklet_kill(&bnad->tx_free_tasklet);
1735
1736 spin_lock_irqsave(&bnad->bna_lock, flags);
1737 bna_tx_destroy(tx_info->tx);
1738 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1739
1740 tx_info->tx = NULL;
1741 tx_info->tx_id = 0;
1742
1743 bnad_tx_res_free(bnad, res_info);
1744 }
1745
1746 /* Should be held with conf_lock held */
1747 int
1748 bnad_setup_tx(struct bnad *bnad, u32 tx_id)
1749 {
1750 int err;
1751 struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id];
1752 struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0];
1753 struct bna_intr_info *intr_info =
1754 &res_info[BNA_TX_RES_INTR_T_TXCMPL].res_u.intr_info;
1755 struct bna_tx_config *tx_config = &bnad->tx_config[tx_id];
1756 static const struct bna_tx_event_cbfn tx_cbfn = {
1757 .tcb_setup_cbfn = bnad_cb_tcb_setup,
1758 .tcb_destroy_cbfn = bnad_cb_tcb_destroy,
1759 .tx_stall_cbfn = bnad_cb_tx_stall,
1760 .tx_resume_cbfn = bnad_cb_tx_resume,
1761 .tx_cleanup_cbfn = bnad_cb_tx_cleanup,
1762 };
1763
1764 struct bna_tx *tx;
1765 unsigned long flags;
1766
1767 tx_info->tx_id = tx_id;
1768
1769 /* Initialize the Tx object configuration */
1770 tx_config->num_txq = bnad->num_txq_per_tx;
1771 tx_config->txq_depth = bnad->txq_depth;
1772 tx_config->tx_type = BNA_TX_T_REGULAR;
1773 tx_config->coalescing_timeo = bnad->tx_coalescing_timeo;
1774
1775 /* Get BNA's resource requirement for one tx object */
1776 spin_lock_irqsave(&bnad->bna_lock, flags);
1777 bna_tx_res_req(bnad->num_txq_per_tx,
1778 bnad->txq_depth, res_info);
1779 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1780
1781 /* Fill Unmap Q memory requirements */
1782 BNAD_FILL_UNMAPQ_MEM_REQ(
1783 &res_info[BNA_TX_RES_MEM_T_UNMAPQ],
1784 bnad->num_txq_per_tx,
1785 BNAD_TX_UNMAPQ_DEPTH);
1786
1787 /* Allocate resources */
1788 err = bnad_tx_res_alloc(bnad, res_info, tx_id);
1789 if (err)
1790 return err;
1791
1792 /* Ask BNA to create one Tx object, supplying required resources */
1793 spin_lock_irqsave(&bnad->bna_lock, flags);
1794 tx = bna_tx_create(&bnad->bna, bnad, tx_config, &tx_cbfn, res_info,
1795 tx_info);
1796 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1797 if (!tx)
1798 goto err_return;
1799 tx_info->tx = tx;
1800
1801 /* Register ISR for the Tx object */
1802 if (intr_info->intr_type == BNA_INTR_T_MSIX) {
1803 err = bnad_tx_msix_register(bnad, tx_info,
1804 tx_id, bnad->num_txq_per_tx);
1805 if (err)
1806 goto err_return;
1807 }
1808
1809 spin_lock_irqsave(&bnad->bna_lock, flags);
1810 bna_tx_enable(tx);
1811 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1812
1813 return 0;
1814
1815 err_return:
1816 bnad_tx_res_free(bnad, res_info);
1817 return err;
1818 }
1819
1820 /* Setup the rx config for bna_rx_create */
1821 /* bnad decides the configuration */
1822 static void
1823 bnad_init_rx_config(struct bnad *bnad, struct bna_rx_config *rx_config)
1824 {
1825 rx_config->rx_type = BNA_RX_T_REGULAR;
1826 rx_config->num_paths = bnad->num_rxp_per_rx;
1827 rx_config->coalescing_timeo = bnad->rx_coalescing_timeo;
1828
1829 if (bnad->num_rxp_per_rx > 1) {
1830 rx_config->rss_status = BNA_STATUS_T_ENABLED;
1831 rx_config->rss_config.hash_type =
1832 (BFI_ENET_RSS_IPV6 |
1833 BFI_ENET_RSS_IPV6_TCP |
1834 BFI_ENET_RSS_IPV4 |
1835 BFI_ENET_RSS_IPV4_TCP);
1836 rx_config->rss_config.hash_mask =
1837 bnad->num_rxp_per_rx - 1;
1838 get_random_bytes(rx_config->rss_config.toeplitz_hash_key,
1839 sizeof(rx_config->rss_config.toeplitz_hash_key));
1840 } else {
1841 rx_config->rss_status = BNA_STATUS_T_DISABLED;
1842 memset(&rx_config->rss_config, 0,
1843 sizeof(rx_config->rss_config));
1844 }
1845 rx_config->rxp_type = BNA_RXP_SLR;
1846 rx_config->q_depth = bnad->rxq_depth;
1847
1848 rx_config->small_buff_size = BFI_SMALL_RXBUF_SIZE;
1849
1850 rx_config->vlan_strip_status = BNA_STATUS_T_ENABLED;
1851 }
1852
1853 static void
1854 bnad_rx_ctrl_init(struct bnad *bnad, u32 rx_id)
1855 {
1856 struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id];
1857 int i;
1858
1859 for (i = 0; i < bnad->num_rxp_per_rx; i++)
1860 rx_info->rx_ctrl[i].bnad = bnad;
1861 }
1862
1863 /* Called with mutex_lock(&bnad->conf_mutex) held */
1864 void
1865 bnad_cleanup_rx(struct bnad *bnad, u32 rx_id)
1866 {
1867 struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id];
1868 struct bna_rx_config *rx_config = &bnad->rx_config[rx_id];
1869 struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0];
1870 unsigned long flags;
1871 int to_del = 0;
1872
1873 if (!rx_info->rx)
1874 return;
1875
1876 if (0 == rx_id) {
1877 spin_lock_irqsave(&bnad->bna_lock, flags);
1878 if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED &&
1879 test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags)) {
1880 clear_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags);
1881 to_del = 1;
1882 }
1883 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1884 if (to_del)
1885 del_timer_sync(&bnad->dim_timer);
1886 }
1887
1888 init_completion(&bnad->bnad_completions.rx_comp);
1889 spin_lock_irqsave(&bnad->bna_lock, flags);
1890 bna_rx_disable(rx_info->rx, BNA_HARD_CLEANUP, bnad_cb_rx_disabled);
1891 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1892 wait_for_completion(&bnad->bnad_completions.rx_comp);
1893
1894 if (rx_info->rx_ctrl[0].ccb->intr_type == BNA_INTR_T_MSIX)
1895 bnad_rx_msix_unregister(bnad, rx_info, rx_config->num_paths);
1896
1897 bnad_napi_disable(bnad, rx_id);
1898
1899 spin_lock_irqsave(&bnad->bna_lock, flags);
1900 bna_rx_destroy(rx_info->rx);
1901
1902 rx_info->rx = NULL;
1903 rx_info->rx_id = 0;
1904 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1905
1906 bnad_rx_res_free(bnad, res_info);
1907 }
1908
1909 /* Called with mutex_lock(&bnad->conf_mutex) held */
1910 int
1911 bnad_setup_rx(struct bnad *bnad, u32 rx_id)
1912 {
1913 int err;
1914 struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id];
1915 struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0];
1916 struct bna_intr_info *intr_info =
1917 &res_info[BNA_RX_RES_T_INTR].res_u.intr_info;
1918 struct bna_rx_config *rx_config = &bnad->rx_config[rx_id];
1919 static const struct bna_rx_event_cbfn rx_cbfn = {
1920 .rcb_setup_cbfn = bnad_cb_rcb_setup,
1921 .rcb_destroy_cbfn = bnad_cb_rcb_destroy,
1922 .ccb_setup_cbfn = bnad_cb_ccb_setup,
1923 .ccb_destroy_cbfn = bnad_cb_ccb_destroy,
1924 .rx_stall_cbfn = bnad_cb_rx_stall,
1925 .rx_cleanup_cbfn = bnad_cb_rx_cleanup,
1926 .rx_post_cbfn = bnad_cb_rx_post,
1927 };
1928 struct bna_rx *rx;
1929 unsigned long flags;
1930
1931 rx_info->rx_id = rx_id;
1932
1933 /* Initialize the Rx object configuration */
1934 bnad_init_rx_config(bnad, rx_config);
1935
1936 /* Get BNA's resource requirement for one Rx object */
1937 spin_lock_irqsave(&bnad->bna_lock, flags);
1938 bna_rx_res_req(rx_config, res_info);
1939 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1940
1941 /* Fill Unmap Q memory requirements */
1942 BNAD_FILL_UNMAPQ_MEM_REQ(
1943 &res_info[BNA_RX_RES_MEM_T_UNMAPQ],
1944 rx_config->num_paths +
1945 ((rx_config->rxp_type == BNA_RXP_SINGLE) ? 0 :
1946 rx_config->num_paths), BNAD_RX_UNMAPQ_DEPTH);
1947
1948 /* Allocate resource */
1949 err = bnad_rx_res_alloc(bnad, res_info, rx_id);
1950 if (err)
1951 return err;
1952
1953 bnad_rx_ctrl_init(bnad, rx_id);
1954
1955 /* Ask BNA to create one Rx object, supplying required resources */
1956 spin_lock_irqsave(&bnad->bna_lock, flags);
1957 rx = bna_rx_create(&bnad->bna, bnad, rx_config, &rx_cbfn, res_info,
1958 rx_info);
1959 if (!rx) {
1960 err = -ENOMEM;
1961 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1962 goto err_return;
1963 }
1964 rx_info->rx = rx;
1965 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1966
1967 /*
1968 * Init NAPI, so that state is set to NAPI_STATE_SCHED,
1969 * so that IRQ handler cannot schedule NAPI at this point.
1970 */
1971 bnad_napi_init(bnad, rx_id);
1972
1973 /* Register ISR for the Rx object */
1974 if (intr_info->intr_type == BNA_INTR_T_MSIX) {
1975 err = bnad_rx_msix_register(bnad, rx_info, rx_id,
1976 rx_config->num_paths);
1977 if (err)
1978 goto err_return;
1979 }
1980
1981 spin_lock_irqsave(&bnad->bna_lock, flags);
1982 if (0 == rx_id) {
1983 /* Set up Dynamic Interrupt Moderation Vector */
1984 if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED)
1985 bna_rx_dim_reconfig(&bnad->bna, bna_napi_dim_vector);
1986
1987 /* Enable VLAN filtering only on the default Rx */
1988 bna_rx_vlanfilter_enable(rx);
1989
1990 /* Start the DIM timer */
1991 bnad_dim_timer_start(bnad);
1992 }
1993
1994 bna_rx_enable(rx);
1995 spin_unlock_irqrestore(&bnad->bna_lock, flags);
1996
1997 /* Enable scheduling of NAPI */
1998 bnad_napi_enable(bnad, rx_id);
1999
2000 return 0;
2001
2002 err_return:
2003 bnad_cleanup_rx(bnad, rx_id);
2004 return err;
2005 }
2006
2007 /* Called with conf_lock & bnad->bna_lock held */
2008 void
2009 bnad_tx_coalescing_timeo_set(struct bnad *bnad)
2010 {
2011 struct bnad_tx_info *tx_info;
2012
2013 tx_info = &bnad->tx_info[0];
2014 if (!tx_info->tx)
2015 return;
2016
2017 bna_tx_coalescing_timeo_set(tx_info->tx, bnad->tx_coalescing_timeo);
2018 }
2019
2020 /* Called with conf_lock & bnad->bna_lock held */
2021 void
2022 bnad_rx_coalescing_timeo_set(struct bnad *bnad)
2023 {
2024 struct bnad_rx_info *rx_info;
2025 int i;
2026
2027 for (i = 0; i < bnad->num_rx; i++) {
2028 rx_info = &bnad->rx_info[i];
2029 if (!rx_info->rx)
2030 continue;
2031 bna_rx_coalescing_timeo_set(rx_info->rx,
2032 bnad->rx_coalescing_timeo);
2033 }
2034 }
2035
2036 /*
2037 * Called with bnad->bna_lock held
2038 */
2039 int
2040 bnad_mac_addr_set_locked(struct bnad *bnad, u8 *mac_addr)
2041 {
2042 int ret;
2043
2044 if (!is_valid_ether_addr(mac_addr))
2045 return -EADDRNOTAVAIL;
2046
2047 /* If datapath is down, pretend everything went through */
2048 if (!bnad->rx_info[0].rx)
2049 return 0;
2050
2051 ret = bna_rx_ucast_set(bnad->rx_info[0].rx, mac_addr, NULL);
2052 if (ret != BNA_CB_SUCCESS)
2053 return -EADDRNOTAVAIL;
2054
2055 return 0;
2056 }
2057
2058 /* Should be called with conf_lock held */
2059 int
2060 bnad_enable_default_bcast(struct bnad *bnad)
2061 {
2062 struct bnad_rx_info *rx_info = &bnad->rx_info[0];
2063 int ret;
2064 unsigned long flags;
2065
2066 init_completion(&bnad->bnad_completions.mcast_comp);
2067
2068 spin_lock_irqsave(&bnad->bna_lock, flags);
2069 ret = bna_rx_mcast_add(rx_info->rx, (u8 *)bnad_bcast_addr,
2070 bnad_cb_rx_mcast_add);
2071 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2072
2073 if (ret == BNA_CB_SUCCESS)
2074 wait_for_completion(&bnad->bnad_completions.mcast_comp);
2075 else
2076 return -ENODEV;
2077
2078 if (bnad->bnad_completions.mcast_comp_status != BNA_CB_SUCCESS)
2079 return -ENODEV;
2080
2081 return 0;
2082 }
2083
2084 /* Called with mutex_lock(&bnad->conf_mutex) held */
2085 void
2086 bnad_restore_vlans(struct bnad *bnad, u32 rx_id)
2087 {
2088 u16 vid;
2089 unsigned long flags;
2090
2091 for_each_set_bit(vid, bnad->active_vlans, VLAN_N_VID) {
2092 spin_lock_irqsave(&bnad->bna_lock, flags);
2093 bna_rx_vlan_add(bnad->rx_info[rx_id].rx, vid);
2094 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2095 }
2096 }
2097
2098 /* Statistics utilities */
2099 void
2100 bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
2101 {
2102 int i, j;
2103
2104 for (i = 0; i < bnad->num_rx; i++) {
2105 for (j = 0; j < bnad->num_rxp_per_rx; j++) {
2106 if (bnad->rx_info[i].rx_ctrl[j].ccb) {
2107 stats->rx_packets += bnad->rx_info[i].
2108 rx_ctrl[j].ccb->rcb[0]->rxq->rx_packets;
2109 stats->rx_bytes += bnad->rx_info[i].
2110 rx_ctrl[j].ccb->rcb[0]->rxq->rx_bytes;
2111 if (bnad->rx_info[i].rx_ctrl[j].ccb->rcb[1] &&
2112 bnad->rx_info[i].rx_ctrl[j].ccb->
2113 rcb[1]->rxq) {
2114 stats->rx_packets +=
2115 bnad->rx_info[i].rx_ctrl[j].
2116 ccb->rcb[1]->rxq->rx_packets;
2117 stats->rx_bytes +=
2118 bnad->rx_info[i].rx_ctrl[j].
2119 ccb->rcb[1]->rxq->rx_bytes;
2120 }
2121 }
2122 }
2123 }
2124 for (i = 0; i < bnad->num_tx; i++) {
2125 for (j = 0; j < bnad->num_txq_per_tx; j++) {
2126 if (bnad->tx_info[i].tcb[j]) {
2127 stats->tx_packets +=
2128 bnad->tx_info[i].tcb[j]->txq->tx_packets;
2129 stats->tx_bytes +=
2130 bnad->tx_info[i].tcb[j]->txq->tx_bytes;
2131 }
2132 }
2133 }
2134 }
2135
2136 /*
2137 * Must be called with the bna_lock held.
2138 */
2139 void
2140 bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
2141 {
2142 struct bfi_enet_stats_mac *mac_stats;
2143 u32 bmap;
2144 int i;
2145
2146 mac_stats = &bnad->stats.bna_stats->hw_stats.mac_stats;
2147 stats->rx_errors =
2148 mac_stats->rx_fcs_error + mac_stats->rx_alignment_error +
2149 mac_stats->rx_frame_length_error + mac_stats->rx_code_error +
2150 mac_stats->rx_undersize;
2151 stats->tx_errors = mac_stats->tx_fcs_error +
2152 mac_stats->tx_undersize;
2153 stats->rx_dropped = mac_stats->rx_drop;
2154 stats->tx_dropped = mac_stats->tx_drop;
2155 stats->multicast = mac_stats->rx_multicast;
2156 stats->collisions = mac_stats->tx_total_collision;
2157
2158 stats->rx_length_errors = mac_stats->rx_frame_length_error;
2159
2160 /* receive ring buffer overflow ?? */
2161
2162 stats->rx_crc_errors = mac_stats->rx_fcs_error;
2163 stats->rx_frame_errors = mac_stats->rx_alignment_error;
2164 /* recv'r fifo overrun */
2165 bmap = bna_rx_rid_mask(&bnad->bna);
2166 for (i = 0; bmap; i++) {
2167 if (bmap & 1) {
2168 stats->rx_fifo_errors +=
2169 bnad->stats.bna_stats->
2170 hw_stats.rxf_stats[i].frame_drops;
2171 break;
2172 }
2173 bmap >>= 1;
2174 }
2175 }
2176
2177 static void
2178 bnad_mbox_irq_sync(struct bnad *bnad)
2179 {
2180 u32 irq;
2181 unsigned long flags;
2182
2183 spin_lock_irqsave(&bnad->bna_lock, flags);
2184 if (bnad->cfg_flags & BNAD_CF_MSIX)
2185 irq = bnad->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector;
2186 else
2187 irq = bnad->pcidev->irq;
2188 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2189
2190 synchronize_irq(irq);
2191 }
2192
2193 /* Utility used by bnad_start_xmit, for doing TSO */
2194 static int
2195 bnad_tso_prepare(struct bnad *bnad, struct sk_buff *skb)
2196 {
2197 int err;
2198
2199 if (skb_header_cloned(skb)) {
2200 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2201 if (err) {
2202 BNAD_UPDATE_CTR(bnad, tso_err);
2203 return err;
2204 }
2205 }
2206
2207 /*
2208 * For TSO, the TCP checksum field is seeded with pseudo-header sum
2209 * excluding the length field.
2210 */
2211 if (skb->protocol == htons(ETH_P_IP)) {
2212 struct iphdr *iph = ip_hdr(skb);
2213
2214 /* Do we really need these? */
2215 iph->tot_len = 0;
2216 iph->check = 0;
2217
2218 tcp_hdr(skb)->check =
2219 ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
2220 IPPROTO_TCP, 0);
2221 BNAD_UPDATE_CTR(bnad, tso4);
2222 } else {
2223 struct ipv6hdr *ipv6h = ipv6_hdr(skb);
2224
2225 ipv6h->payload_len = 0;
2226 tcp_hdr(skb)->check =
2227 ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, 0,
2228 IPPROTO_TCP, 0);
2229 BNAD_UPDATE_CTR(bnad, tso6);
2230 }
2231
2232 return 0;
2233 }
2234
2235 /*
2236 * Initialize Q numbers depending on Rx Paths
2237 * Called with bnad->bna_lock held, because of cfg_flags
2238 * access.
2239 */
2240 static void
2241 bnad_q_num_init(struct bnad *bnad)
2242 {
2243 int rxps;
2244
2245 rxps = min((uint)num_online_cpus(),
2246 (uint)(BNAD_MAX_RX * BNAD_MAX_RXP_PER_RX));
2247
2248 if (!(bnad->cfg_flags & BNAD_CF_MSIX))
2249 rxps = 1; /* INTx */
2250
2251 bnad->num_rx = 1;
2252 bnad->num_tx = 1;
2253 bnad->num_rxp_per_rx = rxps;
2254 bnad->num_txq_per_tx = BNAD_TXQ_NUM;
2255 }
2256
2257 /*
2258 * Adjusts the Q numbers, given a number of msix vectors
2259 * Give preference to RSS as opposed to Tx priority Queues,
2260 * in such a case, just use 1 Tx Q
2261 * Called with bnad->bna_lock held b'cos of cfg_flags access
2262 */
2263 static void
2264 bnad_q_num_adjust(struct bnad *bnad, int msix_vectors, int temp)
2265 {
2266 bnad->num_txq_per_tx = 1;
2267 if ((msix_vectors >= (bnad->num_tx * bnad->num_txq_per_tx) +
2268 bnad_rxqs_per_cq + BNAD_MAILBOX_MSIX_VECTORS) &&
2269 (bnad->cfg_flags & BNAD_CF_MSIX)) {
2270 bnad->num_rxp_per_rx = msix_vectors -
2271 (bnad->num_tx * bnad->num_txq_per_tx) -
2272 BNAD_MAILBOX_MSIX_VECTORS;
2273 } else
2274 bnad->num_rxp_per_rx = 1;
2275 }
2276
2277 /* Enable / disable ioceth */
2278 static int
2279 bnad_ioceth_disable(struct bnad *bnad)
2280 {
2281 unsigned long flags;
2282 int err = 0;
2283
2284 spin_lock_irqsave(&bnad->bna_lock, flags);
2285 init_completion(&bnad->bnad_completions.ioc_comp);
2286 bna_ioceth_disable(&bnad->bna.ioceth, BNA_HARD_CLEANUP);
2287 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2288
2289 wait_for_completion_timeout(&bnad->bnad_completions.ioc_comp,
2290 msecs_to_jiffies(BNAD_IOCETH_TIMEOUT));
2291
2292 err = bnad->bnad_completions.ioc_comp_status;
2293 return err;
2294 }
2295
2296 static int
2297 bnad_ioceth_enable(struct bnad *bnad)
2298 {
2299 int err = 0;
2300 unsigned long flags;
2301
2302 spin_lock_irqsave(&bnad->bna_lock, flags);
2303 init_completion(&bnad->bnad_completions.ioc_comp);
2304 bnad->bnad_completions.ioc_comp_status = BNA_CB_WAITING;
2305 bna_ioceth_enable(&bnad->bna.ioceth);
2306 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2307
2308 wait_for_completion_timeout(&bnad->bnad_completions.ioc_comp,
2309 msecs_to_jiffies(BNAD_IOCETH_TIMEOUT));
2310
2311 err = bnad->bnad_completions.ioc_comp_status;
2312
2313 return err;
2314 }
2315
2316 /* Free BNA resources */
2317 static void
2318 bnad_res_free(struct bnad *bnad, struct bna_res_info *res_info,
2319 u32 res_val_max)
2320 {
2321 int i;
2322
2323 for (i = 0; i < res_val_max; i++)
2324 bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
2325 }
2326
2327 /* Allocates memory and interrupt resources for BNA */
2328 static int
2329 bnad_res_alloc(struct bnad *bnad, struct bna_res_info *res_info,
2330 u32 res_val_max)
2331 {
2332 int i, err;
2333
2334 for (i = 0; i < res_val_max; i++) {
2335 err = bnad_mem_alloc(bnad, &res_info[i].res_u.mem_info);
2336 if (err)
2337 goto err_return;
2338 }
2339 return 0;
2340
2341 err_return:
2342 bnad_res_free(bnad, res_info, res_val_max);
2343 return err;
2344 }
2345
2346 /* Interrupt enable / disable */
2347 static void
2348 bnad_enable_msix(struct bnad *bnad)
2349 {
2350 int i, ret;
2351 unsigned long flags;
2352
2353 spin_lock_irqsave(&bnad->bna_lock, flags);
2354 if (!(bnad->cfg_flags & BNAD_CF_MSIX)) {
2355 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2356 return;
2357 }
2358 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2359
2360 if (bnad->msix_table)
2361 return;
2362
2363 bnad->msix_table =
2364 kcalloc(bnad->msix_num, sizeof(struct msix_entry), GFP_KERNEL);
2365
2366 if (!bnad->msix_table)
2367 goto intx_mode;
2368
2369 for (i = 0; i < bnad->msix_num; i++)
2370 bnad->msix_table[i].entry = i;
2371
2372 ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, bnad->msix_num);
2373 if (ret > 0) {
2374 /* Not enough MSI-X vectors. */
2375 pr_warn("BNA: %d MSI-X vectors allocated < %d requested\n",
2376 ret, bnad->msix_num);
2377
2378 spin_lock_irqsave(&bnad->bna_lock, flags);
2379 /* ret = #of vectors that we got */
2380 bnad_q_num_adjust(bnad, (ret - BNAD_MAILBOX_MSIX_VECTORS) / 2,
2381 (ret - BNAD_MAILBOX_MSIX_VECTORS) / 2);
2382 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2383
2384 bnad->msix_num = BNAD_NUM_TXQ + BNAD_NUM_RXP +
2385 BNAD_MAILBOX_MSIX_VECTORS;
2386
2387 if (bnad->msix_num > ret)
2388 goto intx_mode;
2389
2390 /* Try once more with adjusted numbers */
2391 /* If this fails, fall back to INTx */
2392 ret = pci_enable_msix(bnad->pcidev, bnad->msix_table,
2393 bnad->msix_num);
2394 if (ret)
2395 goto intx_mode;
2396
2397 } else if (ret < 0)
2398 goto intx_mode;
2399
2400 pci_intx(bnad->pcidev, 0);
2401
2402 return;
2403
2404 intx_mode:
2405 pr_warn("BNA: MSI-X enable failed - operating in INTx mode\n");
2406
2407 kfree(bnad->msix_table);
2408 bnad->msix_table = NULL;
2409 bnad->msix_num = 0;
2410 spin_lock_irqsave(&bnad->bna_lock, flags);
2411 bnad->cfg_flags &= ~BNAD_CF_MSIX;
2412 bnad_q_num_init(bnad);
2413 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2414 }
2415
2416 static void
2417 bnad_disable_msix(struct bnad *bnad)
2418 {
2419 u32 cfg_flags;
2420 unsigned long flags;
2421
2422 spin_lock_irqsave(&bnad->bna_lock, flags);
2423 cfg_flags = bnad->cfg_flags;
2424 if (bnad->cfg_flags & BNAD_CF_MSIX)
2425 bnad->cfg_flags &= ~BNAD_CF_MSIX;
2426 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2427
2428 if (cfg_flags & BNAD_CF_MSIX) {
2429 pci_disable_msix(bnad->pcidev);
2430 kfree(bnad->msix_table);
2431 bnad->msix_table = NULL;
2432 }
2433 }
2434
2435 /* Netdev entry points */
2436 static int
2437 bnad_open(struct net_device *netdev)
2438 {
2439 int err;
2440 struct bnad *bnad = netdev_priv(netdev);
2441 struct bna_pause_config pause_config;
2442 int mtu;
2443 unsigned long flags;
2444
2445 mutex_lock(&bnad->conf_mutex);
2446
2447 /* Tx */
2448 err = bnad_setup_tx(bnad, 0);
2449 if (err)
2450 goto err_return;
2451
2452 /* Rx */
2453 err = bnad_setup_rx(bnad, 0);
2454 if (err)
2455 goto cleanup_tx;
2456
2457 /* Port */
2458 pause_config.tx_pause = 0;
2459 pause_config.rx_pause = 0;
2460
2461 mtu = ETH_HLEN + VLAN_HLEN + bnad->netdev->mtu + ETH_FCS_LEN;
2462
2463 spin_lock_irqsave(&bnad->bna_lock, flags);
2464 bna_enet_mtu_set(&bnad->bna.enet, mtu, NULL);
2465 bna_enet_pause_config(&bnad->bna.enet, &pause_config, NULL);
2466 bna_enet_enable(&bnad->bna.enet);
2467 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2468
2469 /* Enable broadcast */
2470 bnad_enable_default_bcast(bnad);
2471
2472 /* Restore VLANs, if any */
2473 bnad_restore_vlans(bnad, 0);
2474
2475 /* Set the UCAST address */
2476 spin_lock_irqsave(&bnad->bna_lock, flags);
2477 bnad_mac_addr_set_locked(bnad, netdev->dev_addr);
2478 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2479
2480 /* Start the stats timer */
2481 bnad_stats_timer_start(bnad);
2482
2483 mutex_unlock(&bnad->conf_mutex);
2484
2485 return 0;
2486
2487 cleanup_tx:
2488 bnad_cleanup_tx(bnad, 0);
2489
2490 err_return:
2491 mutex_unlock(&bnad->conf_mutex);
2492 return err;
2493 }
2494
2495 static int
2496 bnad_stop(struct net_device *netdev)
2497 {
2498 struct bnad *bnad = netdev_priv(netdev);
2499 unsigned long flags;
2500
2501 mutex_lock(&bnad->conf_mutex);
2502
2503 /* Stop the stats timer */
2504 bnad_stats_timer_stop(bnad);
2505
2506 init_completion(&bnad->bnad_completions.enet_comp);
2507
2508 spin_lock_irqsave(&bnad->bna_lock, flags);
2509 bna_enet_disable(&bnad->bna.enet, BNA_HARD_CLEANUP,
2510 bnad_cb_enet_disabled);
2511 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2512
2513 wait_for_completion(&bnad->bnad_completions.enet_comp);
2514
2515 bnad_cleanup_tx(bnad, 0);
2516 bnad_cleanup_rx(bnad, 0);
2517
2518 /* Synchronize mailbox IRQ */
2519 bnad_mbox_irq_sync(bnad);
2520
2521 mutex_unlock(&bnad->conf_mutex);
2522
2523 return 0;
2524 }
2525
2526 /* TX */
2527 /*
2528 * bnad_start_xmit : Netdev entry point for Transmit
2529 * Called under lock held by net_device
2530 */
2531 static netdev_tx_t
2532 bnad_start_xmit(struct sk_buff *skb, struct net_device *netdev)
2533 {
2534 struct bnad *bnad = netdev_priv(netdev);
2535 u32 txq_id = 0;
2536 struct bna_tcb *tcb = bnad->tx_info[0].tcb[txq_id];
2537
2538 u16 txq_prod, vlan_tag = 0;
2539 u32 unmap_prod, wis, wis_used, wi_range;
2540 u32 vectors, vect_id, i, acked;
2541 int err;
2542 unsigned int len;
2543 u32 gso_size;
2544
2545 struct bnad_unmap_q *unmap_q = tcb->unmap_q;
2546 dma_addr_t dma_addr;
2547 struct bna_txq_entry *txqent;
2548 u16 flags;
2549
2550 if (unlikely(skb->len <= ETH_HLEN)) {
2551 dev_kfree_skb(skb);
2552 BNAD_UPDATE_CTR(bnad, tx_skb_too_short);
2553 return NETDEV_TX_OK;
2554 }
2555 if (unlikely(skb_headlen(skb) > BFI_TX_MAX_DATA_PER_VECTOR)) {
2556 dev_kfree_skb(skb);
2557 BNAD_UPDATE_CTR(bnad, tx_skb_headlen_too_long);
2558 return NETDEV_TX_OK;
2559 }
2560 if (unlikely(skb_headlen(skb) == 0)) {
2561 dev_kfree_skb(skb);
2562 BNAD_UPDATE_CTR(bnad, tx_skb_headlen_zero);
2563 return NETDEV_TX_OK;
2564 }
2565
2566 /*
2567 * Takes care of the Tx that is scheduled between clearing the flag
2568 * and the netif_tx_stop_all_queues() call.
2569 */
2570 if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))) {
2571 dev_kfree_skb(skb);
2572 BNAD_UPDATE_CTR(bnad, tx_skb_stopping);
2573 return NETDEV_TX_OK;
2574 }
2575
2576 vectors = 1 + skb_shinfo(skb)->nr_frags;
2577 if (unlikely(vectors > BFI_TX_MAX_VECTORS_PER_PKT)) {
2578 dev_kfree_skb(skb);
2579 BNAD_UPDATE_CTR(bnad, tx_skb_max_vectors);
2580 return NETDEV_TX_OK;
2581 }
2582 wis = BNA_TXQ_WI_NEEDED(vectors); /* 4 vectors per work item */
2583 acked = 0;
2584 if (unlikely(wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) ||
2585 vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) {
2586 if ((u16) (*tcb->hw_consumer_index) !=
2587 tcb->consumer_index &&
2588 !test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags)) {
2589 acked = bnad_free_txbufs(bnad, tcb);
2590 if (likely(test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
2591 bna_ib_ack(tcb->i_dbell, acked);
2592 smp_mb__before_clear_bit();
2593 clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
2594 } else {
2595 netif_stop_queue(netdev);
2596 BNAD_UPDATE_CTR(bnad, netif_queue_stop);
2597 }
2598
2599 smp_mb();
2600 /*
2601 * Check again to deal with race condition between
2602 * netif_stop_queue here, and netif_wake_queue in
2603 * interrupt handler which is not inside netif tx lock.
2604 */
2605 if (likely
2606 (wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) ||
2607 vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) {
2608 BNAD_UPDATE_CTR(bnad, netif_queue_stop);
2609 return NETDEV_TX_BUSY;
2610 } else {
2611 netif_wake_queue(netdev);
2612 BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
2613 }
2614 }
2615
2616 unmap_prod = unmap_q->producer_index;
2617 flags = 0;
2618
2619 txq_prod = tcb->producer_index;
2620 BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt, txqent, wi_range);
2621 txqent->hdr.wi.reserved = 0;
2622 txqent->hdr.wi.num_vectors = vectors;
2623
2624 if (vlan_tx_tag_present(skb)) {
2625 vlan_tag = (u16) vlan_tx_tag_get(skb);
2626 flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN);
2627 }
2628 if (test_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags)) {
2629 vlan_tag =
2630 (tcb->priority & 0x7) << 13 | (vlan_tag & 0x1fff);
2631 flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN);
2632 }
2633
2634 txqent->hdr.wi.vlan_tag = htons(vlan_tag);
2635
2636 if (skb_is_gso(skb)) {
2637 gso_size = skb_shinfo(skb)->gso_size;
2638
2639 if (unlikely(gso_size > netdev->mtu)) {
2640 dev_kfree_skb(skb);
2641 BNAD_UPDATE_CTR(bnad, tx_skb_mss_too_long);
2642 return NETDEV_TX_OK;
2643 }
2644 if (unlikely((gso_size + skb_transport_offset(skb) +
2645 tcp_hdrlen(skb)) >= skb->len)) {
2646 txqent->hdr.wi.opcode =
2647 __constant_htons(BNA_TXQ_WI_SEND);
2648 txqent->hdr.wi.lso_mss = 0;
2649 BNAD_UPDATE_CTR(bnad, tx_skb_tso_too_short);
2650 } else {
2651 txqent->hdr.wi.opcode =
2652 __constant_htons(BNA_TXQ_WI_SEND_LSO);
2653 txqent->hdr.wi.lso_mss = htons(gso_size);
2654 }
2655
2656 err = bnad_tso_prepare(bnad, skb);
2657 if (unlikely(err)) {
2658 dev_kfree_skb(skb);
2659 BNAD_UPDATE_CTR(bnad, tx_skb_tso_prepare);
2660 return NETDEV_TX_OK;
2661 }
2662 flags |= (BNA_TXQ_WI_CF_IP_CKSUM | BNA_TXQ_WI_CF_TCP_CKSUM);
2663 txqent->hdr.wi.l4_hdr_size_n_offset =
2664 htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
2665 (tcp_hdrlen(skb) >> 2,
2666 skb_transport_offset(skb)));
2667 } else {
2668 txqent->hdr.wi.opcode = __constant_htons(BNA_TXQ_WI_SEND);
2669 txqent->hdr.wi.lso_mss = 0;
2670
2671 if (unlikely(skb->len > (netdev->mtu + ETH_HLEN))) {
2672 dev_kfree_skb(skb);
2673 BNAD_UPDATE_CTR(bnad, tx_skb_non_tso_too_long);
2674 return NETDEV_TX_OK;
2675 }
2676
2677 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2678 u8 proto = 0;
2679
2680 if (skb->protocol == __constant_htons(ETH_P_IP))
2681 proto = ip_hdr(skb)->protocol;
2682 else if (skb->protocol ==
2683 __constant_htons(ETH_P_IPV6)) {
2684 /* nexthdr may not be TCP immediately. */
2685 proto = ipv6_hdr(skb)->nexthdr;
2686 }
2687 if (proto == IPPROTO_TCP) {
2688 flags |= BNA_TXQ_WI_CF_TCP_CKSUM;
2689 txqent->hdr.wi.l4_hdr_size_n_offset =
2690 htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
2691 (0, skb_transport_offset(skb)));
2692
2693 BNAD_UPDATE_CTR(bnad, tcpcsum_offload);
2694
2695 if (unlikely(skb_headlen(skb) <
2696 skb_transport_offset(skb) + tcp_hdrlen(skb))) {
2697 dev_kfree_skb(skb);
2698 BNAD_UPDATE_CTR(bnad, tx_skb_tcp_hdr);
2699 return NETDEV_TX_OK;
2700 }
2701
2702 } else if (proto == IPPROTO_UDP) {
2703 flags |= BNA_TXQ_WI_CF_UDP_CKSUM;
2704 txqent->hdr.wi.l4_hdr_size_n_offset =
2705 htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
2706 (0, skb_transport_offset(skb)));
2707
2708 BNAD_UPDATE_CTR(bnad, udpcsum_offload);
2709 if (unlikely(skb_headlen(skb) <
2710 skb_transport_offset(skb) +
2711 sizeof(struct udphdr))) {
2712 dev_kfree_skb(skb);
2713 BNAD_UPDATE_CTR(bnad, tx_skb_udp_hdr);
2714 return NETDEV_TX_OK;
2715 }
2716 } else {
2717 dev_kfree_skb(skb);
2718 BNAD_UPDATE_CTR(bnad, tx_skb_csum_err);
2719 return NETDEV_TX_OK;
2720 }
2721 } else {
2722 txqent->hdr.wi.l4_hdr_size_n_offset = 0;
2723 }
2724 }
2725
2726 txqent->hdr.wi.flags = htons(flags);
2727
2728 txqent->hdr.wi.frame_length = htonl(skb->len);
2729
2730 unmap_q->unmap_array[unmap_prod].skb = skb;
2731 len = skb_headlen(skb);
2732 txqent->vector[0].length = htons(len);
2733 dma_addr = dma_map_single(&bnad->pcidev->dev, skb->data,
2734 skb_headlen(skb), DMA_TO_DEVICE);
2735 dma_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr,
2736 dma_addr);
2737
2738 BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[0].host_addr);
2739 BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);
2740
2741 vect_id = 0;
2742 wis_used = 1;
2743
2744 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2745 const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
2746 u16 size = skb_frag_size(frag);
2747
2748 if (unlikely(size == 0)) {
2749 unmap_prod = unmap_q->producer_index;
2750
2751 unmap_prod = bnad_pci_unmap_skb(&bnad->pcidev->dev,
2752 unmap_q->unmap_array,
2753 unmap_prod, unmap_q->q_depth, skb,
2754 i);
2755 dev_kfree_skb(skb);
2756 BNAD_UPDATE_CTR(bnad, tx_skb_frag_zero);
2757 return NETDEV_TX_OK;
2758 }
2759
2760 len += size;
2761
2762 if (++vect_id == BFI_TX_MAX_VECTORS_PER_WI) {
2763 vect_id = 0;
2764 if (--wi_range)
2765 txqent++;
2766 else {
2767 BNA_QE_INDX_ADD(txq_prod, wis_used,
2768 tcb->q_depth);
2769 wis_used = 0;
2770 BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt,
2771 txqent, wi_range);
2772 }
2773 wis_used++;
2774 txqent->hdr.wi_ext.opcode =
2775 __constant_htons(BNA_TXQ_WI_EXTENSION);
2776 }
2777
2778 BUG_ON(!(size <= BFI_TX_MAX_DATA_PER_VECTOR));
2779 txqent->vector[vect_id].length = htons(size);
2780 dma_addr = skb_frag_dma_map(&bnad->pcidev->dev, frag,
2781 0, size, DMA_TO_DEVICE);
2782 dma_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr,
2783 dma_addr);
2784 BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[vect_id].host_addr);
2785 BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);
2786 }
2787
2788 if (unlikely(len != skb->len)) {
2789 unmap_prod = unmap_q->producer_index;
2790
2791 unmap_prod = bnad_pci_unmap_skb(&bnad->pcidev->dev,
2792 unmap_q->unmap_array, unmap_prod,
2793 unmap_q->q_depth, skb,
2794 skb_shinfo(skb)->nr_frags);
2795 dev_kfree_skb(skb);
2796 BNAD_UPDATE_CTR(bnad, tx_skb_len_mismatch);
2797 return NETDEV_TX_OK;
2798 }
2799
2800 unmap_q->producer_index = unmap_prod;
2801 BNA_QE_INDX_ADD(txq_prod, wis_used, tcb->q_depth);
2802 tcb->producer_index = txq_prod;
2803
2804 smp_mb();
2805
2806 if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
2807 return NETDEV_TX_OK;
2808
2809 bna_txq_prod_indx_doorbell(tcb);
2810 smp_mb();
2811
2812 if ((u16) (*tcb->hw_consumer_index) != tcb->consumer_index)
2813 tasklet_schedule(&bnad->tx_free_tasklet);
2814
2815 return NETDEV_TX_OK;
2816 }
2817
2818 /*
2819 * Used spin_lock to synchronize reading of stats structures, which
2820 * is written by BNA under the same lock.
2821 */
2822 static struct rtnl_link_stats64 *
2823 bnad_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
2824 {
2825 struct bnad *bnad = netdev_priv(netdev);
2826 unsigned long flags;
2827
2828 spin_lock_irqsave(&bnad->bna_lock, flags);
2829
2830 bnad_netdev_qstats_fill(bnad, stats);
2831 bnad_netdev_hwstats_fill(bnad, stats);
2832
2833 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2834
2835 return stats;
2836 }
2837
2838 void
2839 bnad_set_rx_mode(struct net_device *netdev)
2840 {
2841 struct bnad *bnad = netdev_priv(netdev);
2842 u32 new_mask, valid_mask;
2843 unsigned long flags;
2844
2845 spin_lock_irqsave(&bnad->bna_lock, flags);
2846
2847 new_mask = valid_mask = 0;
2848
2849 if (netdev->flags & IFF_PROMISC) {
2850 if (!(bnad->cfg_flags & BNAD_CF_PROMISC)) {
2851 new_mask = BNAD_RXMODE_PROMISC_DEFAULT;
2852 valid_mask = BNAD_RXMODE_PROMISC_DEFAULT;
2853 bnad->cfg_flags |= BNAD_CF_PROMISC;
2854 }
2855 } else {
2856 if (bnad->cfg_flags & BNAD_CF_PROMISC) {
2857 new_mask = ~BNAD_RXMODE_PROMISC_DEFAULT;
2858 valid_mask = BNAD_RXMODE_PROMISC_DEFAULT;
2859 bnad->cfg_flags &= ~BNAD_CF_PROMISC;
2860 }
2861 }
2862
2863 if (netdev->flags & IFF_ALLMULTI) {
2864 if (!(bnad->cfg_flags & BNAD_CF_ALLMULTI)) {
2865 new_mask |= BNA_RXMODE_ALLMULTI;
2866 valid_mask |= BNA_RXMODE_ALLMULTI;
2867 bnad->cfg_flags |= BNAD_CF_ALLMULTI;
2868 }
2869 } else {
2870 if (bnad->cfg_flags & BNAD_CF_ALLMULTI) {
2871 new_mask &= ~BNA_RXMODE_ALLMULTI;
2872 valid_mask |= BNA_RXMODE_ALLMULTI;
2873 bnad->cfg_flags &= ~BNAD_CF_ALLMULTI;
2874 }
2875 }
2876
2877 if (bnad->rx_info[0].rx == NULL)
2878 goto unlock;
2879
2880 bna_rx_mode_set(bnad->rx_info[0].rx, new_mask, valid_mask, NULL);
2881
2882 if (!netdev_mc_empty(netdev)) {
2883 u8 *mcaddr_list;
2884 int mc_count = netdev_mc_count(netdev);
2885
2886 /* Index 0 holds the broadcast address */
2887 mcaddr_list =
2888 kzalloc((mc_count + 1) * ETH_ALEN,
2889 GFP_ATOMIC);
2890 if (!mcaddr_list)
2891 goto unlock;
2892
2893 memcpy(&mcaddr_list[0], &bnad_bcast_addr[0], ETH_ALEN);
2894
2895 /* Copy rest of the MC addresses */
2896 bnad_netdev_mc_list_get(netdev, mcaddr_list);
2897
2898 bna_rx_mcast_listset(bnad->rx_info[0].rx, mc_count + 1,
2899 mcaddr_list, NULL);
2900
2901 /* Should we enable BNAD_CF_ALLMULTI for err != 0 ? */
2902 kfree(mcaddr_list);
2903 }
2904 unlock:
2905 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2906 }
2907
2908 /*
2909 * bna_lock is used to sync writes to netdev->addr
2910 * conf_lock cannot be used since this call may be made
2911 * in a non-blocking context.
2912 */
2913 static int
2914 bnad_set_mac_address(struct net_device *netdev, void *mac_addr)
2915 {
2916 int err;
2917 struct bnad *bnad = netdev_priv(netdev);
2918 struct sockaddr *sa = (struct sockaddr *)mac_addr;
2919 unsigned long flags;
2920
2921 spin_lock_irqsave(&bnad->bna_lock, flags);
2922
2923 err = bnad_mac_addr_set_locked(bnad, sa->sa_data);
2924
2925 if (!err)
2926 memcpy(netdev->dev_addr, sa->sa_data, netdev->addr_len);
2927
2928 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2929
2930 return err;
2931 }
2932
2933 static int
2934 bnad_mtu_set(struct bnad *bnad, int mtu)
2935 {
2936 unsigned long flags;
2937
2938 init_completion(&bnad->bnad_completions.mtu_comp);
2939
2940 spin_lock_irqsave(&bnad->bna_lock, flags);
2941 bna_enet_mtu_set(&bnad->bna.enet, mtu, bnad_cb_enet_mtu_set);
2942 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2943
2944 wait_for_completion(&bnad->bnad_completions.mtu_comp);
2945
2946 return bnad->bnad_completions.mtu_comp_status;
2947 }
2948
2949 static int
2950 bnad_change_mtu(struct net_device *netdev, int new_mtu)
2951 {
2952 int err, mtu = netdev->mtu;
2953 struct bnad *bnad = netdev_priv(netdev);
2954
2955 if (new_mtu + ETH_HLEN < ETH_ZLEN || new_mtu > BNAD_JUMBO_MTU)
2956 return -EINVAL;
2957
2958 mutex_lock(&bnad->conf_mutex);
2959
2960 netdev->mtu = new_mtu;
2961
2962 mtu = ETH_HLEN + VLAN_HLEN + new_mtu + ETH_FCS_LEN;
2963 err = bnad_mtu_set(bnad, mtu);
2964 if (err)
2965 err = -EBUSY;
2966
2967 mutex_unlock(&bnad->conf_mutex);
2968 return err;
2969 }
2970
2971 static int
2972 bnad_vlan_rx_add_vid(struct net_device *netdev,
2973 unsigned short vid)
2974 {
2975 struct bnad *bnad = netdev_priv(netdev);
2976 unsigned long flags;
2977
2978 if (!bnad->rx_info[0].rx)
2979 return 0;
2980
2981 mutex_lock(&bnad->conf_mutex);
2982
2983 spin_lock_irqsave(&bnad->bna_lock, flags);
2984 bna_rx_vlan_add(bnad->rx_info[0].rx, vid);
2985 set_bit(vid, bnad->active_vlans);
2986 spin_unlock_irqrestore(&bnad->bna_lock, flags);
2987
2988 mutex_unlock(&bnad->conf_mutex);
2989
2990 return 0;
2991 }
2992
2993 static int
2994 bnad_vlan_rx_kill_vid(struct net_device *netdev,
2995 unsigned short vid)
2996 {
2997 struct bnad *bnad = netdev_priv(netdev);
2998 unsigned long flags;
2999
3000 if (!bnad->rx_info[0].rx)
3001 return 0;
3002
3003 mutex_lock(&bnad->conf_mutex);
3004
3005 spin_lock_irqsave(&bnad->bna_lock, flags);
3006 clear_bit(vid, bnad->active_vlans);
3007 bna_rx_vlan_del(bnad->rx_info[0].rx, vid);
3008 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3009
3010 mutex_unlock(&bnad->conf_mutex);
3011
3012 return 0;
3013 }
3014
3015 #ifdef CONFIG_NET_POLL_CONTROLLER
3016 static void
3017 bnad_netpoll(struct net_device *netdev)
3018 {
3019 struct bnad *bnad = netdev_priv(netdev);
3020 struct bnad_rx_info *rx_info;
3021 struct bnad_rx_ctrl *rx_ctrl;
3022 u32 curr_mask;
3023 int i, j;
3024
3025 if (!(bnad->cfg_flags & BNAD_CF_MSIX)) {
3026 bna_intx_disable(&bnad->bna, curr_mask);
3027 bnad_isr(bnad->pcidev->irq, netdev);
3028 bna_intx_enable(&bnad->bna, curr_mask);
3029 } else {
3030 /*
3031 * Tx processing may happen in sending context, so no need
3032 * to explicitly process completions here
3033 */
3034
3035 /* Rx processing */
3036 for (i = 0; i < bnad->num_rx; i++) {
3037 rx_info = &bnad->rx_info[i];
3038 if (!rx_info->rx)
3039 continue;
3040 for (j = 0; j < bnad->num_rxp_per_rx; j++) {
3041 rx_ctrl = &rx_info->rx_ctrl[j];
3042 if (rx_ctrl->ccb)
3043 bnad_netif_rx_schedule_poll(bnad,
3044 rx_ctrl->ccb);
3045 }
3046 }
3047 }
3048 }
3049 #endif
3050
3051 static const struct net_device_ops bnad_netdev_ops = {
3052 .ndo_open = bnad_open,
3053 .ndo_stop = bnad_stop,
3054 .ndo_start_xmit = bnad_start_xmit,
3055 .ndo_get_stats64 = bnad_get_stats64,
3056 .ndo_set_rx_mode = bnad_set_rx_mode,
3057 .ndo_validate_addr = eth_validate_addr,
3058 .ndo_set_mac_address = bnad_set_mac_address,
3059 .ndo_change_mtu = bnad_change_mtu,
3060 .ndo_vlan_rx_add_vid = bnad_vlan_rx_add_vid,
3061 .ndo_vlan_rx_kill_vid = bnad_vlan_rx_kill_vid,
3062 #ifdef CONFIG_NET_POLL_CONTROLLER
3063 .ndo_poll_controller = bnad_netpoll
3064 #endif
3065 };
3066
3067 static void
3068 bnad_netdev_init(struct bnad *bnad, bool using_dac)
3069 {
3070 struct net_device *netdev = bnad->netdev;
3071
3072 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
3073 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
3074 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_TX;
3075
3076 netdev->vlan_features = NETIF_F_SG | NETIF_F_HIGHDMA |
3077 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
3078 NETIF_F_TSO | NETIF_F_TSO6;
3079
3080 netdev->features |= netdev->hw_features |
3081 NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
3082
3083 if (using_dac)
3084 netdev->features |= NETIF_F_HIGHDMA;
3085
3086 netdev->mem_start = bnad->mmio_start;
3087 netdev->mem_end = bnad->mmio_start + bnad->mmio_len - 1;
3088
3089 netdev->netdev_ops = &bnad_netdev_ops;
3090 bnad_set_ethtool_ops(netdev);
3091 }
3092
3093 /*
3094 * 1. Initialize the bnad structure
3095 * 2. Setup netdev pointer in pci_dev
3096 * 3. Initialze Tx free tasklet
3097 * 4. Initialize no. of TxQ & CQs & MSIX vectors
3098 */
3099 static int
3100 bnad_init(struct bnad *bnad,
3101 struct pci_dev *pdev, struct net_device *netdev)
3102 {
3103 unsigned long flags;
3104
3105 SET_NETDEV_DEV(netdev, &pdev->dev);
3106 pci_set_drvdata(pdev, netdev);
3107
3108 bnad->netdev = netdev;
3109 bnad->pcidev = pdev;
3110 bnad->mmio_start = pci_resource_start(pdev, 0);
3111 bnad->mmio_len = pci_resource_len(pdev, 0);
3112 bnad->bar0 = ioremap_nocache(bnad->mmio_start, bnad->mmio_len);
3113 if (!bnad->bar0) {
3114 dev_err(&pdev->dev, "ioremap for bar0 failed\n");
3115 pci_set_drvdata(pdev, NULL);
3116 return -ENOMEM;
3117 }
3118 pr_info("bar0 mapped to %p, len %llu\n", bnad->bar0,
3119 (unsigned long long) bnad->mmio_len);
3120
3121 spin_lock_irqsave(&bnad->bna_lock, flags);
3122 if (!bnad_msix_disable)
3123 bnad->cfg_flags = BNAD_CF_MSIX;
3124
3125 bnad->cfg_flags |= BNAD_CF_DIM_ENABLED;
3126
3127 bnad_q_num_init(bnad);
3128 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3129
3130 bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx) +
3131 (bnad->num_rx * bnad->num_rxp_per_rx) +
3132 BNAD_MAILBOX_MSIX_VECTORS;
3133
3134 bnad->txq_depth = BNAD_TXQ_DEPTH;
3135 bnad->rxq_depth = BNAD_RXQ_DEPTH;
3136
3137 bnad->tx_coalescing_timeo = BFI_TX_COALESCING_TIMEO;
3138 bnad->rx_coalescing_timeo = BFI_RX_COALESCING_TIMEO;
3139
3140 tasklet_init(&bnad->tx_free_tasklet, bnad_tx_free_tasklet,
3141 (unsigned long)bnad);
3142
3143 return 0;
3144 }
3145
3146 /*
3147 * Must be called after bnad_pci_uninit()
3148 * so that iounmap() and pci_set_drvdata(NULL)
3149 * happens only after PCI uninitialization.
3150 */
3151 static void
3152 bnad_uninit(struct bnad *bnad)
3153 {
3154 if (bnad->bar0)
3155 iounmap(bnad->bar0);
3156 pci_set_drvdata(bnad->pcidev, NULL);
3157 }
3158
3159 /*
3160 * Initialize locks
3161 a) Per ioceth mutes used for serializing configuration
3162 changes from OS interface
3163 b) spin lock used to protect bna state machine
3164 */
3165 static void
3166 bnad_lock_init(struct bnad *bnad)
3167 {
3168 spin_lock_init(&bnad->bna_lock);
3169 mutex_init(&bnad->conf_mutex);
3170 }
3171
3172 static void
3173 bnad_lock_uninit(struct bnad *bnad)
3174 {
3175 mutex_destroy(&bnad->conf_mutex);
3176 }
3177
3178 /* PCI Initialization */
3179 static int
3180 bnad_pci_init(struct bnad *bnad,
3181 struct pci_dev *pdev, bool *using_dac)
3182 {
3183 int err;
3184
3185 err = pci_enable_device(pdev);
3186 if (err)
3187 return err;
3188 err = pci_request_regions(pdev, BNAD_NAME);
3189 if (err)
3190 goto disable_device;
3191 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3192 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3193 *using_dac = 1;
3194 } else {
3195 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3196 if (err) {
3197 err = dma_set_coherent_mask(&pdev->dev,
3198 DMA_BIT_MASK(32));
3199 if (err)
3200 goto release_regions;
3201 }
3202 *using_dac = 0;
3203 }
3204 pci_set_master(pdev);
3205 return 0;
3206
3207 release_regions:
3208 pci_release_regions(pdev);
3209 disable_device:
3210 pci_disable_device(pdev);
3211
3212 return err;
3213 }
3214
3215 static void
3216 bnad_pci_uninit(struct pci_dev *pdev)
3217 {
3218 pci_release_regions(pdev);
3219 pci_disable_device(pdev);
3220 }
3221
3222 static int __devinit
3223 bnad_pci_probe(struct pci_dev *pdev,
3224 const struct pci_device_id *pcidev_id)
3225 {
3226 bool using_dac;
3227 int err;
3228 struct bnad *bnad;
3229 struct bna *bna;
3230 struct net_device *netdev;
3231 struct bfa_pcidev pcidev_info;
3232 unsigned long flags;
3233
3234 pr_info("bnad_pci_probe : (0x%p, 0x%p) PCI Func : (%d)\n",
3235 pdev, pcidev_id, PCI_FUNC(pdev->devfn));
3236
3237 mutex_lock(&bnad_fwimg_mutex);
3238 if (!cna_get_firmware_buf(pdev)) {
3239 mutex_unlock(&bnad_fwimg_mutex);
3240 pr_warn("Failed to load Firmware Image!\n");
3241 return -ENODEV;
3242 }
3243 mutex_unlock(&bnad_fwimg_mutex);
3244
3245 /*
3246 * Allocates sizeof(struct net_device + struct bnad)
3247 * bnad = netdev->priv
3248 */
3249 netdev = alloc_etherdev(sizeof(struct bnad));
3250 if (!netdev) {
3251 dev_err(&pdev->dev, "netdev allocation failed\n");
3252 err = -ENOMEM;
3253 return err;
3254 }
3255 bnad = netdev_priv(netdev);
3256
3257 bnad_lock_init(bnad);
3258
3259 mutex_lock(&bnad->conf_mutex);
3260 /*
3261 * PCI initialization
3262 * Output : using_dac = 1 for 64 bit DMA
3263 * = 0 for 32 bit DMA
3264 */
3265 err = bnad_pci_init(bnad, pdev, &using_dac);
3266 if (err)
3267 goto unlock_mutex;
3268
3269 /*
3270 * Initialize bnad structure
3271 * Setup relation between pci_dev & netdev
3272 * Init Tx free tasklet
3273 */
3274 err = bnad_init(bnad, pdev, netdev);
3275 if (err)
3276 goto pci_uninit;
3277
3278 /* Initialize netdev structure, set up ethtool ops */
3279 bnad_netdev_init(bnad, using_dac);
3280
3281 /* Set link to down state */
3282 netif_carrier_off(netdev);
3283
3284 /* Get resource requirement form bna */
3285 spin_lock_irqsave(&bnad->bna_lock, flags);
3286 bna_res_req(&bnad->res_info[0]);
3287 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3288
3289 /* Allocate resources from bna */
3290 err = bnad_res_alloc(bnad, &bnad->res_info[0], BNA_RES_T_MAX);
3291 if (err)
3292 goto drv_uninit;
3293
3294 bna = &bnad->bna;
3295
3296 /* Setup pcidev_info for bna_init() */
3297 pcidev_info.pci_slot = PCI_SLOT(bnad->pcidev->devfn);
3298 pcidev_info.pci_func = PCI_FUNC(bnad->pcidev->devfn);
3299 pcidev_info.device_id = bnad->pcidev->device;
3300 pcidev_info.pci_bar_kva = bnad->bar0;
3301
3302 spin_lock_irqsave(&bnad->bna_lock, flags);
3303 bna_init(bna, bnad, &pcidev_info, &bnad->res_info[0]);
3304 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3305
3306 bnad->stats.bna_stats = &bna->stats;
3307
3308 bnad_enable_msix(bnad);
3309 err = bnad_mbox_irq_alloc(bnad);
3310 if (err)
3311 goto res_free;
3312
3313
3314 /* Set up timers */
3315 setup_timer(&bnad->bna.ioceth.ioc.ioc_timer, bnad_ioc_timeout,
3316 ((unsigned long)bnad));
3317 setup_timer(&bnad->bna.ioceth.ioc.hb_timer, bnad_ioc_hb_check,
3318 ((unsigned long)bnad));
3319 setup_timer(&bnad->bna.ioceth.ioc.iocpf_timer, bnad_iocpf_timeout,
3320 ((unsigned long)bnad));
3321 setup_timer(&bnad->bna.ioceth.ioc.sem_timer, bnad_iocpf_sem_timeout,
3322 ((unsigned long)bnad));
3323
3324 /* Now start the timer before calling IOC */
3325 mod_timer(&bnad->bna.ioceth.ioc.iocpf_timer,
3326 jiffies + msecs_to_jiffies(BNA_IOC_TIMER_FREQ));
3327
3328 /*
3329 * Start the chip
3330 * If the call back comes with error, we bail out.
3331 * This is a catastrophic error.
3332 */
3333 err = bnad_ioceth_enable(bnad);
3334 if (err) {
3335 pr_err("BNA: Initialization failed err=%d\n",
3336 err);
3337 goto probe_success;
3338 }
3339
3340 spin_lock_irqsave(&bnad->bna_lock, flags);
3341 if (bna_num_txq_set(bna, BNAD_NUM_TXQ + 1) ||
3342 bna_num_rxp_set(bna, BNAD_NUM_RXP + 1)) {
3343 bnad_q_num_adjust(bnad, bna_attr(bna)->num_txq - 1,
3344 bna_attr(bna)->num_rxp - 1);
3345 if (bna_num_txq_set(bna, BNAD_NUM_TXQ + 1) ||
3346 bna_num_rxp_set(bna, BNAD_NUM_RXP + 1))
3347 err = -EIO;
3348 }
3349 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3350 if (err)
3351 goto disable_ioceth;
3352
3353 spin_lock_irqsave(&bnad->bna_lock, flags);
3354 bna_mod_res_req(&bnad->bna, &bnad->mod_res_info[0]);
3355 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3356
3357 err = bnad_res_alloc(bnad, &bnad->mod_res_info[0], BNA_MOD_RES_T_MAX);
3358 if (err) {
3359 err = -EIO;
3360 goto disable_ioceth;
3361 }
3362
3363 spin_lock_irqsave(&bnad->bna_lock, flags);
3364 bna_mod_init(&bnad->bna, &bnad->mod_res_info[0]);
3365 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3366
3367 /* Get the burnt-in mac */
3368 spin_lock_irqsave(&bnad->bna_lock, flags);
3369 bna_enet_perm_mac_get(&bna->enet, &bnad->perm_addr);
3370 bnad_set_netdev_perm_addr(bnad);
3371 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3372
3373 mutex_unlock(&bnad->conf_mutex);
3374
3375 /* Finally, reguister with net_device layer */
3376 err = register_netdev(netdev);
3377 if (err) {
3378 pr_err("BNA : Registering with netdev failed\n");
3379 goto probe_uninit;
3380 }
3381 set_bit(BNAD_RF_NETDEV_REGISTERED, &bnad->run_flags);
3382
3383 return 0;
3384
3385 probe_success:
3386 mutex_unlock(&bnad->conf_mutex);
3387 return 0;
3388
3389 probe_uninit:
3390 mutex_lock(&bnad->conf_mutex);
3391 bnad_res_free(bnad, &bnad->mod_res_info[0], BNA_MOD_RES_T_MAX);
3392 disable_ioceth:
3393 bnad_ioceth_disable(bnad);
3394 del_timer_sync(&bnad->bna.ioceth.ioc.ioc_timer);
3395 del_timer_sync(&bnad->bna.ioceth.ioc.sem_timer);
3396 del_timer_sync(&bnad->bna.ioceth.ioc.hb_timer);
3397 spin_lock_irqsave(&bnad->bna_lock, flags);
3398 bna_uninit(bna);
3399 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3400 bnad_mbox_irq_free(bnad);
3401 bnad_disable_msix(bnad);
3402 res_free:
3403 bnad_res_free(bnad, &bnad->res_info[0], BNA_RES_T_MAX);
3404 drv_uninit:
3405 bnad_uninit(bnad);
3406 pci_uninit:
3407 bnad_pci_uninit(pdev);
3408 unlock_mutex:
3409 mutex_unlock(&bnad->conf_mutex);
3410 bnad_lock_uninit(bnad);
3411 free_netdev(netdev);
3412 return err;
3413 }
3414
3415 static void __devexit
3416 bnad_pci_remove(struct pci_dev *pdev)
3417 {
3418 struct net_device *netdev = pci_get_drvdata(pdev);
3419 struct bnad *bnad;
3420 struct bna *bna;
3421 unsigned long flags;
3422
3423 if (!netdev)
3424 return;
3425
3426 pr_info("%s bnad_pci_remove\n", netdev->name);
3427 bnad = netdev_priv(netdev);
3428 bna = &bnad->bna;
3429
3430 if (test_and_clear_bit(BNAD_RF_NETDEV_REGISTERED, &bnad->run_flags))
3431 unregister_netdev(netdev);
3432
3433 mutex_lock(&bnad->conf_mutex);
3434 bnad_ioceth_disable(bnad);
3435 del_timer_sync(&bnad->bna.ioceth.ioc.ioc_timer);
3436 del_timer_sync(&bnad->bna.ioceth.ioc.sem_timer);
3437 del_timer_sync(&bnad->bna.ioceth.ioc.hb_timer);
3438 spin_lock_irqsave(&bnad->bna_lock, flags);
3439 bna_uninit(bna);
3440 spin_unlock_irqrestore(&bnad->bna_lock, flags);
3441
3442 bnad_res_free(bnad, &bnad->mod_res_info[0], BNA_MOD_RES_T_MAX);
3443 bnad_res_free(bnad, &bnad->res_info[0], BNA_RES_T_MAX);
3444 bnad_mbox_irq_free(bnad);
3445 bnad_disable_msix(bnad);
3446 bnad_pci_uninit(pdev);
3447 mutex_unlock(&bnad->conf_mutex);
3448 bnad_lock_uninit(bnad);
3449 bnad_uninit(bnad);
3450 free_netdev(netdev);
3451 }
3452
3453 static DEFINE_PCI_DEVICE_TABLE(bnad_pci_id_table) = {
3454 {
3455 PCI_DEVICE(PCI_VENDOR_ID_BROCADE,
3456 PCI_DEVICE_ID_BROCADE_CT),
3457 .class = PCI_CLASS_NETWORK_ETHERNET << 8,
3458 .class_mask = 0xffff00
3459 },
3460 {
3461 PCI_DEVICE(PCI_VENDOR_ID_BROCADE,
3462 BFA_PCI_DEVICE_ID_CT2),
3463 .class = PCI_CLASS_NETWORK_ETHERNET << 8,
3464 .class_mask = 0xffff00
3465 },
3466 {0, },
3467 };
3468
3469 MODULE_DEVICE_TABLE(pci, bnad_pci_id_table);
3470
3471 static struct pci_driver bnad_pci_driver = {
3472 .name = BNAD_NAME,
3473 .id_table = bnad_pci_id_table,
3474 .probe = bnad_pci_probe,
3475 .remove = __devexit_p(bnad_pci_remove),
3476 };
3477
3478 static int __init
3479 bnad_module_init(void)
3480 {
3481 int err;
3482
3483 pr_info("Brocade 10G Ethernet driver - version: %s\n",
3484 BNAD_VERSION);
3485
3486 bfa_nw_ioc_auto_recover(bnad_ioc_auto_recover);
3487
3488 err = pci_register_driver(&bnad_pci_driver);
3489 if (err < 0) {
3490 pr_err("bna : PCI registration failed in module init "
3491 "(%d)\n", err);
3492 return err;
3493 }
3494
3495 return 0;
3496 }
3497
3498 static void __exit
3499 bnad_module_exit(void)
3500 {
3501 pci_unregister_driver(&bnad_pci_driver);
3502
3503 if (bfi_fw)
3504 release_firmware(bfi_fw);
3505 }
3506
3507 module_init(bnad_module_init);
3508 module_exit(bnad_module_exit);
3509
3510 MODULE_AUTHOR("Brocade");
3511 MODULE_LICENSE("GPL");
3512 MODULE_DESCRIPTION("Brocade 10G PCIe Ethernet driver");
3513 MODULE_VERSION(BNAD_VERSION);
3514 MODULE_FIRMWARE(CNA_FW_FILE_CT);
3515 MODULE_FIRMWARE(CNA_FW_FILE_CT2);
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