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6
7#include <linux/kernel.h>
8#include <linux/netdevice.h>
9#include <linux/u64_stats_sync.h>
10#include <linux/errno.h>
11#include <linux/types.h>
12#include <linux/pci.h>
13#include <linux/device.h>
14#include <linux/dma-mapping.h>
15#include <linux/slab.h>
16#include <linux/interrupt.h>
17#include <linux/skbuff.h>
18#include <linux/smp.h>
19#include <asm/byteorder.h>
20#include <linux/ip.h>
21#include <linux/tcp.h>
22#include <linux/sctp.h>
23#include <linux/ipv6.h>
24#include <net/ipv6.h>
25#include <net/checksum.h>
26#include <net/ip6_checksum.h>
27
28#include "hinic_common.h"
29#include "hinic_hw_if.h"
30#include "hinic_hw_wqe.h"
31#include "hinic_hw_wq.h"
32#include "hinic_hw_qp.h"
33#include "hinic_hw_dev.h"
34#include "hinic_dev.h"
35#include "hinic_tx.h"
36
37#define TX_IRQ_NO_PENDING 0
38#define TX_IRQ_NO_COALESC 0
39#define TX_IRQ_NO_LLI_TIMER 0
40#define TX_IRQ_NO_CREDIT 0
41#define TX_IRQ_NO_RESEND_TIMER 0
42
43#define CI_UPDATE_NO_PENDING 0
44#define CI_UPDATE_NO_COALESC 0
45
46#define HW_CONS_IDX(sq) be16_to_cpu(*(u16 *)((sq)->hw_ci_addr))
47
48#define MIN_SKB_LEN 32
49
50#define MAX_PAYLOAD_OFFSET 221
51#define TRANSPORT_OFFSET(l4_hdr, skb) ((u32)((l4_hdr) - (skb)->data))
52
53union hinic_l3 {
54 struct iphdr *v4;
55 struct ipv6hdr *v6;
56 unsigned char *hdr;
57};
58
59union hinic_l4 {
60 struct tcphdr *tcp;
61 struct udphdr *udp;
62 unsigned char *hdr;
63};
64
65enum hinic_offload_type {
66 TX_OFFLOAD_TSO = BIT(0),
67 TX_OFFLOAD_CSUM = BIT(1),
68 TX_OFFLOAD_VLAN = BIT(2),
69 TX_OFFLOAD_INVALID = BIT(3),
70};
71
72
73
74
75
76void hinic_txq_clean_stats(struct hinic_txq *txq)
77{
78 struct hinic_txq_stats *txq_stats = &txq->txq_stats;
79
80 u64_stats_update_begin(&txq_stats->syncp);
81 txq_stats->pkts = 0;
82 txq_stats->bytes = 0;
83 txq_stats->tx_busy = 0;
84 txq_stats->tx_wake = 0;
85 txq_stats->tx_dropped = 0;
86 txq_stats->big_frags_pkts = 0;
87 u64_stats_update_end(&txq_stats->syncp);
88}
89
90
91
92
93
94
95void hinic_txq_get_stats(struct hinic_txq *txq, struct hinic_txq_stats *stats)
96{
97 struct hinic_txq_stats *txq_stats = &txq->txq_stats;
98 unsigned int start;
99
100 u64_stats_update_begin(&stats->syncp);
101 do {
102 start = u64_stats_fetch_begin(&txq_stats->syncp);
103 stats->pkts = txq_stats->pkts;
104 stats->bytes = txq_stats->bytes;
105 stats->tx_busy = txq_stats->tx_busy;
106 stats->tx_wake = txq_stats->tx_wake;
107 stats->tx_dropped = txq_stats->tx_dropped;
108 stats->big_frags_pkts = txq_stats->big_frags_pkts;
109 } while (u64_stats_fetch_retry(&txq_stats->syncp, start));
110 u64_stats_update_end(&stats->syncp);
111}
112
113
114
115
116
117static void txq_stats_init(struct hinic_txq *txq)
118{
119 struct hinic_txq_stats *txq_stats = &txq->txq_stats;
120
121 u64_stats_init(&txq_stats->syncp);
122 hinic_txq_clean_stats(txq);
123}
124
125
126
127
128
129
130
131
132
133static int tx_map_skb(struct hinic_dev *nic_dev, struct sk_buff *skb,
134 struct hinic_sge *sges)
135{
136 struct hinic_hwdev *hwdev = nic_dev->hwdev;
137 struct hinic_hwif *hwif = hwdev->hwif;
138 struct pci_dev *pdev = hwif->pdev;
139 skb_frag_t *frag;
140 dma_addr_t dma_addr;
141 int i, j;
142
143 dma_addr = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
144 DMA_TO_DEVICE);
145 if (dma_mapping_error(&pdev->dev, dma_addr)) {
146 dev_err(&pdev->dev, "Failed to map Tx skb data\n");
147 return -EFAULT;
148 }
149
150 hinic_set_sge(&sges[0], dma_addr, skb_headlen(skb));
151
152 for (i = 0 ; i < skb_shinfo(skb)->nr_frags; i++) {
153 frag = &skb_shinfo(skb)->frags[i];
154
155 dma_addr = skb_frag_dma_map(&pdev->dev, frag, 0,
156 skb_frag_size(frag),
157 DMA_TO_DEVICE);
158 if (dma_mapping_error(&pdev->dev, dma_addr)) {
159 dev_err(&pdev->dev, "Failed to map Tx skb frag\n");
160 goto err_tx_map;
161 }
162
163 hinic_set_sge(&sges[i + 1], dma_addr, skb_frag_size(frag));
164 }
165
166 return 0;
167
168err_tx_map:
169 for (j = 0; j < i; j++)
170 dma_unmap_page(&pdev->dev, hinic_sge_to_dma(&sges[j + 1]),
171 sges[j + 1].len, DMA_TO_DEVICE);
172
173 dma_unmap_single(&pdev->dev, hinic_sge_to_dma(&sges[0]), sges[0].len,
174 DMA_TO_DEVICE);
175 return -EFAULT;
176}
177
178
179
180
181
182
183
184static void tx_unmap_skb(struct hinic_dev *nic_dev, struct sk_buff *skb,
185 struct hinic_sge *sges)
186{
187 struct hinic_hwdev *hwdev = nic_dev->hwdev;
188 struct hinic_hwif *hwif = hwdev->hwif;
189 struct pci_dev *pdev = hwif->pdev;
190 int i;
191
192 for (i = 0; i < skb_shinfo(skb)->nr_frags ; i++)
193 dma_unmap_page(&pdev->dev, hinic_sge_to_dma(&sges[i + 1]),
194 sges[i + 1].len, DMA_TO_DEVICE);
195
196 dma_unmap_single(&pdev->dev, hinic_sge_to_dma(&sges[0]), sges[0].len,
197 DMA_TO_DEVICE);
198}
199
200static void get_inner_l3_l4_type(struct sk_buff *skb, union hinic_l3 *ip,
201 union hinic_l4 *l4,
202 enum hinic_offload_type offload_type,
203 enum hinic_l3_offload_type *l3_type,
204 u8 *l4_proto)
205{
206 u8 *exthdr;
207
208 if (ip->v4->version == 4) {
209 *l3_type = (offload_type == TX_OFFLOAD_CSUM) ?
210 IPV4_PKT_NO_CHKSUM_OFFLOAD :
211 IPV4_PKT_WITH_CHKSUM_OFFLOAD;
212 *l4_proto = ip->v4->protocol;
213 } else if (ip->v4->version == 6) {
214 *l3_type = IPV6_PKT;
215 exthdr = ip->hdr + sizeof(*ip->v6);
216 *l4_proto = ip->v6->nexthdr;
217 if (exthdr != l4->hdr) {
218 int start = exthdr - skb->data;
219 __be16 frag_off;
220
221 ipv6_skip_exthdr(skb, start, l4_proto, &frag_off);
222 }
223 } else {
224 *l3_type = L3TYPE_UNKNOWN;
225 *l4_proto = 0;
226 }
227}
228
229static void get_inner_l4_info(struct sk_buff *skb, union hinic_l4 *l4,
230 enum hinic_offload_type offload_type, u8 l4_proto,
231 enum hinic_l4_offload_type *l4_offload,
232 u32 *l4_len, u32 *offset)
233{
234 *l4_offload = OFFLOAD_DISABLE;
235 *offset = 0;
236 *l4_len = 0;
237
238 switch (l4_proto) {
239 case IPPROTO_TCP:
240 *l4_offload = TCP_OFFLOAD_ENABLE;
241
242 *l4_len = l4->tcp->doff * 4;
243 *offset = *l4_len + TRANSPORT_OFFSET(l4->hdr, skb);
244 break;
245
246 case IPPROTO_UDP:
247 *l4_offload = UDP_OFFLOAD_ENABLE;
248 *l4_len = sizeof(struct udphdr);
249 *offset = TRANSPORT_OFFSET(l4->hdr, skb);
250 break;
251
252 case IPPROTO_SCTP:
253
254 if (offload_type != TX_OFFLOAD_CSUM)
255 break;
256
257 *l4_offload = SCTP_OFFLOAD_ENABLE;
258 *l4_len = sizeof(struct sctphdr);
259 *offset = TRANSPORT_OFFSET(l4->hdr, skb);
260 break;
261
262 default:
263 break;
264 }
265}
266
267static __sum16 csum_magic(union hinic_l3 *ip, unsigned short proto)
268{
269 return (ip->v4->version == 4) ?
270 csum_tcpudp_magic(ip->v4->saddr, ip->v4->daddr, 0, proto, 0) :
271 csum_ipv6_magic(&ip->v6->saddr, &ip->v6->daddr, 0, proto, 0);
272}
273
274static int offload_tso(struct hinic_sq_task *task, u32 *queue_info,
275 struct sk_buff *skb)
276{
277 u32 offset, l4_len, ip_identify, network_hdr_len;
278 enum hinic_l3_offload_type l3_offload;
279 enum hinic_l4_offload_type l4_offload;
280 union hinic_l3 ip;
281 union hinic_l4 l4;
282 u8 l4_proto;
283
284 if (!skb_is_gso(skb))
285 return 0;
286
287 if (skb_cow_head(skb, 0) < 0)
288 return -EPROTONOSUPPORT;
289
290 if (skb->encapsulation) {
291 u32 gso_type = skb_shinfo(skb)->gso_type;
292 u32 tunnel_type = 0;
293 u32 l4_tunnel_len;
294
295 ip.hdr = skb_network_header(skb);
296 l4.hdr = skb_transport_header(skb);
297 network_hdr_len = skb_inner_network_header_len(skb);
298
299 if (ip.v4->version == 4) {
300 ip.v4->tot_len = 0;
301 l3_offload = IPV4_PKT_WITH_CHKSUM_OFFLOAD;
302 } else if (ip.v4->version == 6) {
303 l3_offload = IPV6_PKT;
304 } else {
305 l3_offload = 0;
306 }
307
308 hinic_task_set_outter_l3(task, l3_offload,
309 skb_network_header_len(skb));
310
311 if (gso_type & SKB_GSO_UDP_TUNNEL_CSUM) {
312 l4.udp->check = ~csum_magic(&ip, IPPROTO_UDP);
313 tunnel_type = TUNNEL_UDP_CSUM;
314 } else if (gso_type & SKB_GSO_UDP_TUNNEL) {
315 tunnel_type = TUNNEL_UDP_NO_CSUM;
316 }
317
318 l4_tunnel_len = skb_inner_network_offset(skb) -
319 skb_transport_offset(skb);
320 hinic_task_set_tunnel_l4(task, tunnel_type, l4_tunnel_len);
321
322 ip.hdr = skb_inner_network_header(skb);
323 l4.hdr = skb_inner_transport_header(skb);
324 } else {
325 ip.hdr = skb_network_header(skb);
326 l4.hdr = skb_transport_header(skb);
327 network_hdr_len = skb_network_header_len(skb);
328 }
329
330
331 if (ip.v4->version == 4)
332 ip.v4->tot_len = 0;
333 else
334 ip.v6->payload_len = 0;
335
336 get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_TSO, &l3_offload,
337 &l4_proto);
338
339 hinic_task_set_inner_l3(task, l3_offload, network_hdr_len);
340
341 ip_identify = 0;
342 if (l4_proto == IPPROTO_TCP)
343 l4.tcp->check = ~csum_magic(&ip, IPPROTO_TCP);
344
345 get_inner_l4_info(skb, &l4, TX_OFFLOAD_TSO, l4_proto, &l4_offload,
346 &l4_len, &offset);
347
348 hinic_set_tso_inner_l4(task, queue_info, l4_offload, l4_len, offset,
349 ip_identify, skb_shinfo(skb)->gso_size);
350
351 return 1;
352}
353
354static int offload_csum(struct hinic_sq_task *task, u32 *queue_info,
355 struct sk_buff *skb)
356{
357 enum hinic_l4_offload_type l4_offload;
358 u32 offset, l4_len, network_hdr_len;
359 enum hinic_l3_offload_type l3_type;
360 union hinic_l3 ip;
361 union hinic_l4 l4;
362 u8 l4_proto;
363
364 if (skb->ip_summed != CHECKSUM_PARTIAL)
365 return 0;
366
367 if (skb->encapsulation) {
368 u32 l4_tunnel_len;
369
370 ip.hdr = skb_network_header(skb);
371
372 if (ip.v4->version == 4)
373 l3_type = IPV4_PKT_NO_CHKSUM_OFFLOAD;
374 else if (ip.v4->version == 6)
375 l3_type = IPV6_PKT;
376 else
377 l3_type = L3TYPE_UNKNOWN;
378
379 hinic_task_set_outter_l3(task, l3_type,
380 skb_network_header_len(skb));
381
382 l4_tunnel_len = skb_inner_network_offset(skb) -
383 skb_transport_offset(skb);
384
385 hinic_task_set_tunnel_l4(task, TUNNEL_UDP_NO_CSUM,
386 l4_tunnel_len);
387
388 ip.hdr = skb_inner_network_header(skb);
389 l4.hdr = skb_inner_transport_header(skb);
390 network_hdr_len = skb_inner_network_header_len(skb);
391 } else {
392 ip.hdr = skb_network_header(skb);
393 l4.hdr = skb_transport_header(skb);
394 network_hdr_len = skb_network_header_len(skb);
395 }
396
397 get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_CSUM, &l3_type,
398 &l4_proto);
399
400 hinic_task_set_inner_l3(task, l3_type, network_hdr_len);
401
402 get_inner_l4_info(skb, &l4, TX_OFFLOAD_CSUM, l4_proto, &l4_offload,
403 &l4_len, &offset);
404
405 hinic_set_cs_inner_l4(task, queue_info, l4_offload, l4_len, offset);
406
407 return 1;
408}
409
410static void offload_vlan(struct hinic_sq_task *task, u32 *queue_info,
411 u16 vlan_tag, u16 vlan_pri)
412{
413 task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(vlan_tag, VLAN_TAG) |
414 HINIC_SQ_TASK_INFO0_SET(1U, VLAN_OFFLOAD);
415
416 *queue_info |= HINIC_SQ_CTRL_SET(vlan_pri, QUEUE_INFO_PRI);
417}
418
419static int hinic_tx_offload(struct sk_buff *skb, struct hinic_sq_task *task,
420 u32 *queue_info)
421{
422 enum hinic_offload_type offload = 0;
423 u16 vlan_tag;
424 int enabled;
425
426 enabled = offload_tso(task, queue_info, skb);
427 if (enabled > 0) {
428 offload |= TX_OFFLOAD_TSO;
429 } else if (enabled == 0) {
430 enabled = offload_csum(task, queue_info, skb);
431 if (enabled)
432 offload |= TX_OFFLOAD_CSUM;
433 } else {
434 return -EPROTONOSUPPORT;
435 }
436
437 if (unlikely(skb_vlan_tag_present(skb))) {
438 vlan_tag = skb_vlan_tag_get(skb);
439 offload_vlan(task, queue_info, vlan_tag,
440 vlan_tag >> VLAN_PRIO_SHIFT);
441 offload |= TX_OFFLOAD_VLAN;
442 }
443
444 if (offload)
445 hinic_task_set_l2hdr(task, skb_network_offset(skb));
446
447
448 if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_PLDOFF) >
449 MAX_PAYLOAD_OFFSET) {
450 return -EPROTONOSUPPORT;
451 }
452
453
454 if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_MSS) < HINIC_MSS_MIN) {
455 *queue_info = HINIC_SQ_CTRL_CLEAR(*queue_info, QUEUE_INFO_MSS);
456 *queue_info |= HINIC_SQ_CTRL_SET(HINIC_MSS_MIN, QUEUE_INFO_MSS);
457 }
458
459 return 0;
460}
461
462netdev_tx_t hinic_lb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
463{
464 struct hinic_dev *nic_dev = netdev_priv(netdev);
465 u16 prod_idx, q_id = skb->queue_mapping;
466 struct netdev_queue *netdev_txq;
467 int nr_sges, err = NETDEV_TX_OK;
468 struct hinic_sq_wqe *sq_wqe;
469 unsigned int wqe_size;
470 struct hinic_txq *txq;
471 struct hinic_qp *qp;
472
473 txq = &nic_dev->txqs[q_id];
474 qp = container_of(txq->sq, struct hinic_qp, sq);
475 nr_sges = skb_shinfo(skb)->nr_frags + 1;
476
477 err = tx_map_skb(nic_dev, skb, txq->sges);
478 if (err)
479 goto skb_error;
480
481 wqe_size = HINIC_SQ_WQE_SIZE(nr_sges);
482
483 sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx);
484 if (!sq_wqe) {
485 netif_stop_subqueue(netdev, qp->q_id);
486
487 sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx);
488 if (sq_wqe) {
489 netif_wake_subqueue(nic_dev->netdev, qp->q_id);
490 goto process_sq_wqe;
491 }
492
493 tx_unmap_skb(nic_dev, skb, txq->sges);
494
495 u64_stats_update_begin(&txq->txq_stats.syncp);
496 txq->txq_stats.tx_busy++;
497 u64_stats_update_end(&txq->txq_stats.syncp);
498 err = NETDEV_TX_BUSY;
499 wqe_size = 0;
500 goto flush_skbs;
501 }
502
503process_sq_wqe:
504 hinic_sq_prepare_wqe(txq->sq, prod_idx, sq_wqe, txq->sges, nr_sges);
505 hinic_sq_write_wqe(txq->sq, prod_idx, sq_wqe, skb, wqe_size);
506
507flush_skbs:
508 netdev_txq = netdev_get_tx_queue(netdev, q_id);
509 if ((!netdev_xmit_more()) || (netif_xmit_stopped(netdev_txq)))
510 hinic_sq_write_db(txq->sq, prod_idx, wqe_size, 0);
511
512 return err;
513
514skb_error:
515 dev_kfree_skb_any(skb);
516 u64_stats_update_begin(&txq->txq_stats.syncp);
517 txq->txq_stats.tx_dropped++;
518 u64_stats_update_end(&txq->txq_stats.syncp);
519
520 return NETDEV_TX_OK;
521}
522
523netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
524{
525 struct hinic_dev *nic_dev = netdev_priv(netdev);
526 u16 prod_idx, q_id = skb->queue_mapping;
527 struct netdev_queue *netdev_txq;
528 int nr_sges, err = NETDEV_TX_OK;
529 struct hinic_sq_wqe *sq_wqe;
530 unsigned int wqe_size;
531 struct hinic_txq *txq;
532 struct hinic_qp *qp;
533
534 txq = &nic_dev->txqs[q_id];
535 qp = container_of(txq->sq, struct hinic_qp, sq);
536
537 if (skb->len < MIN_SKB_LEN) {
538 if (skb_pad(skb, MIN_SKB_LEN - skb->len)) {
539 netdev_err(netdev, "Failed to pad skb\n");
540 goto update_error_stats;
541 }
542
543 skb->len = MIN_SKB_LEN;
544 }
545
546 nr_sges = skb_shinfo(skb)->nr_frags + 1;
547 if (nr_sges > 17) {
548 u64_stats_update_begin(&txq->txq_stats.syncp);
549 txq->txq_stats.big_frags_pkts++;
550 u64_stats_update_end(&txq->txq_stats.syncp);
551 }
552
553 if (nr_sges > txq->max_sges) {
554 netdev_err(netdev, "Too many Tx sges\n");
555 goto skb_error;
556 }
557
558 err = tx_map_skb(nic_dev, skb, txq->sges);
559 if (err)
560 goto skb_error;
561
562 wqe_size = HINIC_SQ_WQE_SIZE(nr_sges);
563
564 sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx);
565 if (!sq_wqe) {
566 netif_stop_subqueue(netdev, qp->q_id);
567
568
569
570
571 sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx);
572 if (sq_wqe) {
573 netif_wake_subqueue(nic_dev->netdev, qp->q_id);
574 goto process_sq_wqe;
575 }
576
577 tx_unmap_skb(nic_dev, skb, txq->sges);
578
579 u64_stats_update_begin(&txq->txq_stats.syncp);
580 txq->txq_stats.tx_busy++;
581 u64_stats_update_end(&txq->txq_stats.syncp);
582 err = NETDEV_TX_BUSY;
583 wqe_size = 0;
584 goto flush_skbs;
585 }
586
587process_sq_wqe:
588 hinic_sq_prepare_wqe(txq->sq, prod_idx, sq_wqe, txq->sges, nr_sges);
589
590 err = hinic_tx_offload(skb, &sq_wqe->task, &sq_wqe->ctrl.queue_info);
591 if (err)
592 goto offload_error;
593
594 hinic_sq_write_wqe(txq->sq, prod_idx, sq_wqe, skb, wqe_size);
595
596flush_skbs:
597 netdev_txq = netdev_get_tx_queue(netdev, q_id);
598 if ((!netdev_xmit_more()) || (netif_xmit_stopped(netdev_txq)))
599 hinic_sq_write_db(txq->sq, prod_idx, wqe_size, 0);
600
601 return err;
602
603offload_error:
604 hinic_sq_return_wqe(txq->sq, wqe_size);
605 tx_unmap_skb(nic_dev, skb, txq->sges);
606
607skb_error:
608 dev_kfree_skb_any(skb);
609
610update_error_stats:
611 u64_stats_update_begin(&txq->txq_stats.syncp);
612 txq->txq_stats.tx_dropped++;
613 u64_stats_update_end(&txq->txq_stats.syncp);
614
615 return NETDEV_TX_OK;
616}
617
618
619
620
621
622
623
624static void tx_free_skb(struct hinic_dev *nic_dev, struct sk_buff *skb,
625 struct hinic_sge *sges)
626{
627 tx_unmap_skb(nic_dev, skb, sges);
628
629 dev_kfree_skb_any(skb);
630}
631
632
633
634
635
636static void free_all_tx_skbs(struct hinic_txq *txq)
637{
638 struct hinic_dev *nic_dev = netdev_priv(txq->netdev);
639 struct hinic_sq *sq = txq->sq;
640 struct hinic_sq_wqe *sq_wqe;
641 unsigned int wqe_size;
642 struct sk_buff *skb;
643 int nr_sges;
644 u16 ci;
645
646 while ((sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &ci))) {
647 sq_wqe = hinic_sq_read_wqe(sq, &skb, wqe_size, &ci);
648 if (!sq_wqe)
649 break;
650
651 nr_sges = skb_shinfo(skb)->nr_frags + 1;
652
653 hinic_sq_get_sges(sq_wqe, txq->free_sges, nr_sges);
654
655 hinic_sq_put_wqe(sq, wqe_size);
656
657 tx_free_skb(nic_dev, skb, txq->free_sges);
658 }
659}
660
661
662
663
664
665
666
667
668static int free_tx_poll(struct napi_struct *napi, int budget)
669{
670 struct hinic_txq *txq = container_of(napi, struct hinic_txq, napi);
671 struct hinic_qp *qp = container_of(txq->sq, struct hinic_qp, sq);
672 struct hinic_dev *nic_dev = netdev_priv(txq->netdev);
673 struct netdev_queue *netdev_txq;
674 struct hinic_sq *sq = txq->sq;
675 struct hinic_wq *wq = sq->wq;
676 struct hinic_sq_wqe *sq_wqe;
677 unsigned int wqe_size;
678 int nr_sges, pkts = 0;
679 struct sk_buff *skb;
680 u64 tx_bytes = 0;
681 u16 hw_ci, sw_ci;
682
683 do {
684 hw_ci = HW_CONS_IDX(sq) & wq->mask;
685
686 dma_rmb();
687
688
689 sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &sw_ci);
690 if ((!sq_wqe) ||
691 (((hw_ci - sw_ci) & wq->mask) * wq->wqebb_size < wqe_size))
692 break;
693
694
695
696
697 if (wqe_size > wq->wqebb_size) {
698 sq_wqe = hinic_sq_read_wqe(sq, &skb, wqe_size, &sw_ci);
699 if (unlikely(!sq_wqe))
700 break;
701 }
702
703 tx_bytes += skb->len;
704 pkts++;
705
706 nr_sges = skb_shinfo(skb)->nr_frags + 1;
707
708 hinic_sq_get_sges(sq_wqe, txq->free_sges, nr_sges);
709
710 hinic_sq_put_wqe(sq, wqe_size);
711
712 tx_free_skb(nic_dev, skb, txq->free_sges);
713 } while (pkts < budget);
714
715 if (__netif_subqueue_stopped(nic_dev->netdev, qp->q_id) &&
716 hinic_get_sq_free_wqebbs(sq) >= HINIC_MIN_TX_NUM_WQEBBS(sq)) {
717 netdev_txq = netdev_get_tx_queue(txq->netdev, qp->q_id);
718
719 __netif_tx_lock(netdev_txq, smp_processor_id());
720 if (!netif_testing(nic_dev->netdev))
721 netif_wake_subqueue(nic_dev->netdev, qp->q_id);
722
723 __netif_tx_unlock(netdev_txq);
724
725 u64_stats_update_begin(&txq->txq_stats.syncp);
726 txq->txq_stats.tx_wake++;
727 u64_stats_update_end(&txq->txq_stats.syncp);
728 }
729
730 u64_stats_update_begin(&txq->txq_stats.syncp);
731 txq->txq_stats.bytes += tx_bytes;
732 txq->txq_stats.pkts += pkts;
733 u64_stats_update_end(&txq->txq_stats.syncp);
734
735 if (pkts < budget) {
736 napi_complete(napi);
737 if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
738 hinic_hwdev_set_msix_state(nic_dev->hwdev,
739 sq->msix_entry,
740 HINIC_MSIX_ENABLE);
741
742 return pkts;
743 }
744
745 return budget;
746}
747
748static irqreturn_t tx_irq(int irq, void *data)
749{
750 struct hinic_txq *txq = data;
751 struct hinic_dev *nic_dev;
752
753 nic_dev = netdev_priv(txq->netdev);
754
755 if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
756
757 hinic_hwdev_set_msix_state(nic_dev->hwdev,
758 txq->sq->msix_entry,
759 HINIC_MSIX_DISABLE);
760
761 hinic_hwdev_msix_cnt_set(nic_dev->hwdev, txq->sq->msix_entry);
762
763 napi_schedule(&txq->napi);
764 return IRQ_HANDLED;
765}
766
767static int tx_request_irq(struct hinic_txq *txq)
768{
769 struct hinic_dev *nic_dev = netdev_priv(txq->netdev);
770 struct hinic_msix_config interrupt_info = {0};
771 struct hinic_intr_coal_info *intr_coal = NULL;
772 struct hinic_hwdev *hwdev = nic_dev->hwdev;
773 struct hinic_hwif *hwif = hwdev->hwif;
774 struct pci_dev *pdev = hwif->pdev;
775 struct hinic_sq *sq = txq->sq;
776 struct hinic_qp *qp;
777 int err;
778
779 qp = container_of(sq, struct hinic_qp, sq);
780
781 netif_napi_add(txq->netdev, &txq->napi, free_tx_poll, nic_dev->tx_weight);
782
783 hinic_hwdev_msix_set(nic_dev->hwdev, sq->msix_entry,
784 TX_IRQ_NO_PENDING, TX_IRQ_NO_COALESC,
785 TX_IRQ_NO_LLI_TIMER, TX_IRQ_NO_CREDIT,
786 TX_IRQ_NO_RESEND_TIMER);
787
788 intr_coal = &nic_dev->tx_intr_coalesce[qp->q_id];
789 interrupt_info.msix_index = sq->msix_entry;
790 interrupt_info.coalesce_timer_cnt = intr_coal->coalesce_timer_cfg;
791 interrupt_info.pending_cnt = intr_coal->pending_limt;
792 interrupt_info.resend_timer_cnt = intr_coal->resend_timer_cfg;
793
794 err = hinic_set_interrupt_cfg(hwdev, &interrupt_info);
795 if (err) {
796 netif_err(nic_dev, drv, txq->netdev,
797 "Failed to set TX interrupt coalescing attribute\n");
798 netif_napi_del(&txq->napi);
799 return err;
800 }
801
802 err = request_irq(sq->irq, tx_irq, 0, txq->irq_name, txq);
803 if (err) {
804 dev_err(&pdev->dev, "Failed to request Tx irq\n");
805 netif_napi_del(&txq->napi);
806 return err;
807 }
808
809 return 0;
810}
811
812static void tx_free_irq(struct hinic_txq *txq)
813{
814 struct hinic_sq *sq = txq->sq;
815
816 free_irq(sq->irq, txq);
817 netif_napi_del(&txq->napi);
818}
819
820
821
822
823
824
825
826
827
828int hinic_init_txq(struct hinic_txq *txq, struct hinic_sq *sq,
829 struct net_device *netdev)
830{
831 struct hinic_qp *qp = container_of(sq, struct hinic_qp, sq);
832 struct hinic_dev *nic_dev = netdev_priv(netdev);
833 struct hinic_hwdev *hwdev = nic_dev->hwdev;
834 int err, irqname_len;
835 size_t sges_size;
836
837 txq->netdev = netdev;
838 txq->sq = sq;
839
840 txq_stats_init(txq);
841
842 txq->max_sges = HINIC_MAX_SQ_BUFDESCS;
843
844 sges_size = txq->max_sges * sizeof(*txq->sges);
845 txq->sges = devm_kzalloc(&netdev->dev, sges_size, GFP_KERNEL);
846 if (!txq->sges)
847 return -ENOMEM;
848
849 sges_size = txq->max_sges * sizeof(*txq->free_sges);
850 txq->free_sges = devm_kzalloc(&netdev->dev, sges_size, GFP_KERNEL);
851 if (!txq->free_sges) {
852 err = -ENOMEM;
853 goto err_alloc_free_sges;
854 }
855
856 irqname_len = snprintf(NULL, 0, "hinic_txq%d", qp->q_id) + 1;
857 txq->irq_name = devm_kzalloc(&netdev->dev, irqname_len, GFP_KERNEL);
858 if (!txq->irq_name) {
859 err = -ENOMEM;
860 goto err_alloc_irqname;
861 }
862
863 sprintf(txq->irq_name, "hinic_txq%d", qp->q_id);
864
865 err = hinic_hwdev_hw_ci_addr_set(hwdev, sq, CI_UPDATE_NO_PENDING,
866 CI_UPDATE_NO_COALESC);
867 if (err)
868 goto err_hw_ci;
869
870 err = tx_request_irq(txq);
871 if (err) {
872 netdev_err(netdev, "Failed to request Tx irq\n");
873 goto err_req_tx_irq;
874 }
875
876 return 0;
877
878err_req_tx_irq:
879err_hw_ci:
880 devm_kfree(&netdev->dev, txq->irq_name);
881
882err_alloc_irqname:
883 devm_kfree(&netdev->dev, txq->free_sges);
884
885err_alloc_free_sges:
886 devm_kfree(&netdev->dev, txq->sges);
887 return err;
888}
889
890
891
892
893
894void hinic_clean_txq(struct hinic_txq *txq)
895{
896 struct net_device *netdev = txq->netdev;
897
898 tx_free_irq(txq);
899
900 free_all_tx_skbs(txq);
901
902 devm_kfree(&netdev->dev, txq->irq_name);
903 devm_kfree(&netdev->dev, txq->free_sges);
904 devm_kfree(&netdev->dev, txq->sges);
905}
906
