1
2
3
4
5
6
7#include "core.h"
8#include "hif.h"
9#include "debug.h"
10
11
12
13
14
15static void ath10k_htc_control_tx_complete(struct ath10k *ar,
16 struct sk_buff *skb)
17{
18 kfree_skb(skb);
19}
20
21static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
22{
23 struct sk_buff *skb;
24 struct ath10k_skb_cb *skb_cb;
25
26 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
27 if (!skb)
28 return NULL;
29
30 skb_reserve(skb, 20);
31 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
32
33 skb_cb = ATH10K_SKB_CB(skb);
34 memset(skb_cb, 0, sizeof(*skb_cb));
35
36 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb);
37 return skb;
38}
39
40static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
41 struct sk_buff *skb)
42{
43 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
44
45 if (htc->ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
46 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
47 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
48}
49
50void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
51 struct sk_buff *skb)
52{
53 struct ath10k *ar = ep->htc->ar;
54 struct ath10k_htc_hdr *hdr;
55
56 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__,
57 ep->eid, skb);
58
59 hdr = (struct ath10k_htc_hdr *)skb->data;
60 ath10k_htc_restore_tx_skb(ep->htc, skb);
61
62 if (!ep->ep_ops.ep_tx_complete) {
63 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
64 dev_kfree_skb_any(skb);
65 return;
66 }
67
68 if (hdr->flags & ATH10K_HTC_FLAG_SEND_BUNDLE) {
69 dev_kfree_skb_any(skb);
70 return;
71 }
72
73 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
74}
75EXPORT_SYMBOL(ath10k_htc_notify_tx_completion);
76
77static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
78 struct sk_buff *skb)
79{
80 struct ath10k_htc_hdr *hdr;
81
82 hdr = (struct ath10k_htc_hdr *)skb->data;
83 memset(hdr, 0, sizeof(struct ath10k_htc_hdr));
84
85 hdr->eid = ep->eid;
86 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
87 hdr->flags = 0;
88 if (ep->tx_credit_flow_enabled && !ep->bundle_tx)
89 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
90
91 spin_lock_bh(&ep->htc->tx_lock);
92 hdr->seq_no = ep->seq_no++;
93 spin_unlock_bh(&ep->htc->tx_lock);
94}
95
96static int ath10k_htc_consume_credit(struct ath10k_htc_ep *ep,
97 unsigned int len,
98 bool consume)
99{
100 struct ath10k_htc *htc = ep->htc;
101 struct ath10k *ar = htc->ar;
102 enum ath10k_htc_ep_id eid = ep->eid;
103 int credits, ret = 0;
104
105 if (!ep->tx_credit_flow_enabled)
106 return 0;
107
108 credits = DIV_ROUND_UP(len, ep->tx_credit_size);
109 spin_lock_bh(&htc->tx_lock);
110
111 if (ep->tx_credits < credits) {
112 ath10k_dbg(ar, ATH10K_DBG_HTC,
113 "htc insufficient credits ep %d required %d available %d consume %d\n",
114 eid, credits, ep->tx_credits, consume);
115 ret = -EAGAIN;
116 goto unlock;
117 }
118
119 if (consume) {
120 ep->tx_credits -= credits;
121 ath10k_dbg(ar, ATH10K_DBG_HTC,
122 "htc ep %d consumed %d credits total %d\n",
123 eid, credits, ep->tx_credits);
124 }
125
126unlock:
127 spin_unlock_bh(&htc->tx_lock);
128 return ret;
129}
130
131static void ath10k_htc_release_credit(struct ath10k_htc_ep *ep, unsigned int len)
132{
133 struct ath10k_htc *htc = ep->htc;
134 struct ath10k *ar = htc->ar;
135 enum ath10k_htc_ep_id eid = ep->eid;
136 int credits;
137
138 if (!ep->tx_credit_flow_enabled)
139 return;
140
141 credits = DIV_ROUND_UP(len, ep->tx_credit_size);
142 spin_lock_bh(&htc->tx_lock);
143 ep->tx_credits += credits;
144 ath10k_dbg(ar, ATH10K_DBG_HTC,
145 "htc ep %d reverted %d credits back total %d\n",
146 eid, credits, ep->tx_credits);
147 spin_unlock_bh(&htc->tx_lock);
148
149 if (ep->ep_ops.ep_tx_credits)
150 ep->ep_ops.ep_tx_credits(htc->ar);
151}
152
153int ath10k_htc_send(struct ath10k_htc *htc,
154 enum ath10k_htc_ep_id eid,
155 struct sk_buff *skb)
156{
157 struct ath10k *ar = htc->ar;
158 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
159 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
160 struct ath10k_hif_sg_item sg_item;
161 struct device *dev = htc->ar->dev;
162 int ret;
163 unsigned int skb_len;
164
165 if (htc->ar->state == ATH10K_STATE_WEDGED)
166 return -ECOMM;
167
168 if (eid >= ATH10K_HTC_EP_COUNT) {
169 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
170 return -ENOENT;
171 }
172
173 skb_push(skb, sizeof(struct ath10k_htc_hdr));
174
175 skb_len = skb->len;
176 ret = ath10k_htc_consume_credit(ep, skb_len, true);
177 if (ret)
178 goto err_pull;
179
180 ath10k_htc_prepare_tx_skb(ep, skb);
181
182 skb_cb->eid = eid;
183 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
184 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len,
185 DMA_TO_DEVICE);
186 ret = dma_mapping_error(dev, skb_cb->paddr);
187 if (ret) {
188 ret = -EIO;
189 goto err_credits;
190 }
191 }
192
193 sg_item.transfer_id = ep->eid;
194 sg_item.transfer_context = skb;
195 sg_item.vaddr = skb->data;
196 sg_item.paddr = skb_cb->paddr;
197 sg_item.len = skb->len;
198
199 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
200 if (ret)
201 goto err_unmap;
202
203 return 0;
204
205err_unmap:
206 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
207 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
208err_credits:
209 ath10k_htc_release_credit(ep, skb_len);
210err_pull:
211 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
212 return ret;
213}
214
215void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
216{
217 struct ath10k_htc *htc = &ar->htc;
218 struct ath10k_skb_cb *skb_cb;
219 struct ath10k_htc_ep *ep;
220
221 if (WARN_ON_ONCE(!skb))
222 return;
223
224 skb_cb = ATH10K_SKB_CB(skb);
225 ep = &htc->endpoint[skb_cb->eid];
226
227 ath10k_htc_notify_tx_completion(ep, skb);
228
229}
230EXPORT_SYMBOL(ath10k_htc_tx_completion_handler);
231
232
233
234
235
236static void
237ath10k_htc_process_credit_report(struct ath10k_htc *htc,
238 const struct ath10k_htc_credit_report *report,
239 int len,
240 enum ath10k_htc_ep_id eid)
241{
242 struct ath10k *ar = htc->ar;
243 struct ath10k_htc_ep *ep;
244 int i, n_reports;
245
246 if (len % sizeof(*report))
247 ath10k_warn(ar, "Uneven credit report len %d", len);
248
249 n_reports = len / sizeof(*report);
250
251 spin_lock_bh(&htc->tx_lock);
252 for (i = 0; i < n_reports; i++, report++) {
253 if (report->eid >= ATH10K_HTC_EP_COUNT)
254 break;
255
256 ep = &htc->endpoint[report->eid];
257 ep->tx_credits += report->credits;
258
259 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
260 report->eid, report->credits, ep->tx_credits);
261
262 if (ep->ep_ops.ep_tx_credits) {
263 spin_unlock_bh(&htc->tx_lock);
264 ep->ep_ops.ep_tx_credits(htc->ar);
265 spin_lock_bh(&htc->tx_lock);
266 }
267 }
268 spin_unlock_bh(&htc->tx_lock);
269}
270
271static int
272ath10k_htc_process_lookahead(struct ath10k_htc *htc,
273 const struct ath10k_htc_lookahead_report *report,
274 int len,
275 enum ath10k_htc_ep_id eid,
276 void *next_lookaheads,
277 int *next_lookaheads_len)
278{
279 struct ath10k *ar = htc->ar;
280
281
282
283
284
285
286 if (report->pre_valid != ((~report->post_valid) & 0xFF))
287 return 0;
288
289 if (next_lookaheads && next_lookaheads_len) {
290 ath10k_dbg(ar, ATH10K_DBG_HTC,
291 "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n",
292 report->pre_valid, report->post_valid);
293
294
295 memcpy((u8 *)next_lookaheads, report->lookahead, 4);
296
297 *next_lookaheads_len = 1;
298 }
299
300 return 0;
301}
302
303static int
304ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc,
305 const struct ath10k_htc_lookahead_bundle *report,
306 int len,
307 enum ath10k_htc_ep_id eid,
308 void *next_lookaheads,
309 int *next_lookaheads_len)
310{
311 struct ath10k *ar = htc->ar;
312 int bundle_cnt = len / sizeof(*report);
313
314 if (!bundle_cnt || (bundle_cnt > htc->max_msgs_per_htc_bundle)) {
315 ath10k_warn(ar, "Invalid lookahead bundle count: %d\n",
316 bundle_cnt);
317 return -EINVAL;
318 }
319
320 if (next_lookaheads && next_lookaheads_len) {
321 int i;
322
323 for (i = 0; i < bundle_cnt; i++) {
324 memcpy(((u8 *)next_lookaheads) + 4 * i,
325 report->lookahead, 4);
326 report++;
327 }
328
329 *next_lookaheads_len = bundle_cnt;
330 }
331
332 return 0;
333}
334
335int ath10k_htc_process_trailer(struct ath10k_htc *htc,
336 u8 *buffer,
337 int length,
338 enum ath10k_htc_ep_id src_eid,
339 void *next_lookaheads,
340 int *next_lookaheads_len)
341{
342 struct ath10k_htc_lookahead_bundle *bundle;
343 struct ath10k *ar = htc->ar;
344 int status = 0;
345 struct ath10k_htc_record *record;
346 u8 *orig_buffer;
347 int orig_length;
348 size_t len;
349
350 orig_buffer = buffer;
351 orig_length = length;
352
353 while (length > 0) {
354 record = (struct ath10k_htc_record *)buffer;
355
356 if (length < sizeof(record->hdr)) {
357 status = -EINVAL;
358 break;
359 }
360
361 if (record->hdr.len > length) {
362
363 ath10k_warn(ar, "Invalid record length: %d\n",
364 record->hdr.len);
365 status = -EINVAL;
366 break;
367 }
368
369 switch (record->hdr.id) {
370 case ATH10K_HTC_RECORD_CREDITS:
371 len = sizeof(struct ath10k_htc_credit_report);
372 if (record->hdr.len < len) {
373 ath10k_warn(ar, "Credit report too long\n");
374 status = -EINVAL;
375 break;
376 }
377 ath10k_htc_process_credit_report(htc,
378 record->credit_report,
379 record->hdr.len,
380 src_eid);
381 break;
382 case ATH10K_HTC_RECORD_LOOKAHEAD:
383 len = sizeof(struct ath10k_htc_lookahead_report);
384 if (record->hdr.len < len) {
385 ath10k_warn(ar, "Lookahead report too long\n");
386 status = -EINVAL;
387 break;
388 }
389 status = ath10k_htc_process_lookahead(htc,
390 record->lookahead_report,
391 record->hdr.len,
392 src_eid,
393 next_lookaheads,
394 next_lookaheads_len);
395 break;
396 case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE:
397 bundle = record->lookahead_bundle;
398 status = ath10k_htc_process_lookahead_bundle(htc,
399 bundle,
400 record->hdr.len,
401 src_eid,
402 next_lookaheads,
403 next_lookaheads_len);
404 break;
405 default:
406 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
407 record->hdr.id, record->hdr.len);
408 break;
409 }
410
411 if (status)
412 break;
413
414
415 buffer += sizeof(record->hdr) + record->hdr.len;
416 length -= sizeof(record->hdr) + record->hdr.len;
417 }
418
419 if (status)
420 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
421 orig_buffer, orig_length);
422
423 return status;
424}
425EXPORT_SYMBOL(ath10k_htc_process_trailer);
426
427void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
428{
429 int status = 0;
430 struct ath10k_htc *htc = &ar->htc;
431 struct ath10k_htc_hdr *hdr;
432 struct ath10k_htc_ep *ep;
433 u16 payload_len;
434 u32 trailer_len = 0;
435 size_t min_len;
436 u8 eid;
437 bool trailer_present;
438
439 hdr = (struct ath10k_htc_hdr *)skb->data;
440 skb_pull(skb, sizeof(*hdr));
441
442 eid = hdr->eid;
443
444 if (eid >= ATH10K_HTC_EP_COUNT) {
445 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
446 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
447 hdr, sizeof(*hdr));
448 goto out;
449 }
450
451 ep = &htc->endpoint[eid];
452 if (ep->service_id == ATH10K_HTC_SVC_ID_UNUSED) {
453 ath10k_warn(ar, "htc rx endpoint %d is not connected\n", eid);
454 goto out;
455 }
456
457 payload_len = __le16_to_cpu(hdr->len);
458
459 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
460 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
461 payload_len + sizeof(*hdr));
462 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
463 hdr, sizeof(*hdr));
464 goto out;
465 }
466
467 if (skb->len < payload_len) {
468 ath10k_dbg(ar, ATH10K_DBG_HTC,
469 "HTC Rx: insufficient length, got %d, expected %d\n",
470 skb->len, payload_len);
471 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
472 "", hdr, sizeof(*hdr));
473 goto out;
474 }
475
476
477 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
478 if (trailer_present) {
479 u8 *trailer;
480
481 trailer_len = hdr->trailer_len;
482 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
483
484 if ((trailer_len < min_len) ||
485 (trailer_len > payload_len)) {
486 ath10k_warn(ar, "Invalid trailer length: %d\n",
487 trailer_len);
488 goto out;
489 }
490
491 trailer = (u8 *)hdr;
492 trailer += sizeof(*hdr);
493 trailer += payload_len;
494 trailer -= trailer_len;
495 status = ath10k_htc_process_trailer(htc, trailer,
496 trailer_len, hdr->eid,
497 NULL, NULL);
498 if (status)
499 goto out;
500
501 skb_trim(skb, skb->len - trailer_len);
502 }
503
504 if (((int)payload_len - (int)trailer_len) <= 0)
505
506 goto out;
507
508 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
509 eid, skb);
510 ep->ep_ops.ep_rx_complete(ar, skb);
511
512
513 skb = NULL;
514out:
515 kfree_skb(skb);
516}
517EXPORT_SYMBOL(ath10k_htc_rx_completion_handler);
518
519static void ath10k_htc_control_rx_complete(struct ath10k *ar,
520 struct sk_buff *skb)
521{
522 struct ath10k_htc *htc = &ar->htc;
523 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
524
525 switch (__le16_to_cpu(msg->hdr.message_id)) {
526 case ATH10K_HTC_MSG_READY_ID:
527 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
528
529 if (completion_done(&htc->ctl_resp)) {
530
531
532
533 ath10k_warn(ar, "HTC rx ctrl still processing\n");
534 complete(&htc->ctl_resp);
535 goto out;
536 }
537
538 htc->control_resp_len =
539 min_t(int, skb->len,
540 ATH10K_HTC_MAX_CTRL_MSG_LEN);
541
542 memcpy(htc->control_resp_buffer, skb->data,
543 htc->control_resp_len);
544
545 complete(&htc->ctl_resp);
546 break;
547 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
548 htc->htc_ops.target_send_suspend_complete(ar);
549 break;
550 default:
551 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
552 break;
553 }
554
555out:
556 kfree_skb(skb);
557}
558
559
560
561
562
563static const char *htc_service_name(enum ath10k_htc_svc_id id)
564{
565 switch (id) {
566 case ATH10K_HTC_SVC_ID_RESERVED:
567 return "Reserved";
568 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
569 return "Control";
570 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
571 return "WMI";
572 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
573 return "DATA BE";
574 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
575 return "DATA BK";
576 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
577 return "DATA VI";
578 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
579 return "DATA VO";
580 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
581 return "NMI Control";
582 case ATH10K_HTC_SVC_ID_NMI_DATA:
583 return "NMI Data";
584 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
585 return "HTT Data";
586 case ATH10K_HTC_SVC_ID_HTT_DATA2_MSG:
587 return "HTT Data";
588 case ATH10K_HTC_SVC_ID_HTT_DATA3_MSG:
589 return "HTT Data";
590 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
591 return "RAW";
592 case ATH10K_HTC_SVC_ID_HTT_LOG_MSG:
593 return "PKTLOG";
594 }
595
596 return "Unknown";
597}
598
599static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
600{
601 struct ath10k_htc_ep *ep;
602 int i;
603
604 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
605 ep = &htc->endpoint[i];
606 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
607 ep->max_ep_message_len = 0;
608 ep->max_tx_queue_depth = 0;
609 ep->eid = i;
610 ep->htc = htc;
611 ep->tx_credit_flow_enabled = true;
612 }
613}
614
615static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
616 u16 service_id)
617{
618 u8 allocation = 0;
619
620
621
622
623 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL)
624 allocation = htc->total_transmit_credits;
625
626 return allocation;
627}
628
629static int ath10k_htc_send_bundle(struct ath10k_htc_ep *ep,
630 struct sk_buff *bundle_skb,
631 struct sk_buff_head *tx_save_head)
632{
633 struct ath10k_hif_sg_item sg_item;
634 struct ath10k_htc *htc = ep->htc;
635 struct ath10k *ar = htc->ar;
636 struct sk_buff *skb;
637 int ret, cn = 0;
638 unsigned int skb_len;
639
640 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle skb len %d\n", bundle_skb->len);
641 skb_len = bundle_skb->len;
642 ret = ath10k_htc_consume_credit(ep, skb_len, true);
643
644 if (!ret) {
645 sg_item.transfer_id = ep->eid;
646 sg_item.transfer_context = bundle_skb;
647 sg_item.vaddr = bundle_skb->data;
648 sg_item.len = bundle_skb->len;
649
650 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
651 if (ret)
652 ath10k_htc_release_credit(ep, skb_len);
653 }
654
655 if (ret)
656 dev_kfree_skb_any(bundle_skb);
657
658 for (cn = 0; (skb = skb_dequeue_tail(tx_save_head)); cn++) {
659 if (ret) {
660 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
661 skb_queue_head(&ep->tx_req_head, skb);
662 } else {
663 skb_queue_tail(&ep->tx_complete_head, skb);
664 }
665 }
666
667 if (!ret)
668 queue_work(ar->workqueue_tx_complete, &ar->tx_complete_work);
669
670 ath10k_dbg(ar, ATH10K_DBG_HTC,
671 "bundle tx status %d eid %d req count %d count %d len %d\n",
672 ret, ep->eid, skb_queue_len(&ep->tx_req_head), cn, skb_len);
673 return ret;
674}
675
676static void ath10k_htc_send_one_skb(struct ath10k_htc_ep *ep, struct sk_buff *skb)
677{
678 struct ath10k_htc *htc = ep->htc;
679 struct ath10k *ar = htc->ar;
680 int ret;
681
682 ret = ath10k_htc_send(htc, ep->eid, skb);
683
684 if (ret)
685 skb_queue_head(&ep->tx_req_head, skb);
686
687 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx one status %d eid %d len %d pending count %d\n",
688 ret, ep->eid, skb->len, skb_queue_len(&ep->tx_req_head));
689}
690
691static int ath10k_htc_send_bundle_skbs(struct ath10k_htc_ep *ep)
692{
693 struct ath10k_htc *htc = ep->htc;
694 struct sk_buff *bundle_skb, *skb;
695 struct sk_buff_head tx_save_head;
696 struct ath10k_htc_hdr *hdr;
697 u8 *bundle_buf;
698 int ret = 0, credit_pad, credit_remainder, trans_len, bundles_left = 0;
699
700 if (htc->ar->state == ATH10K_STATE_WEDGED)
701 return -ECOMM;
702
703 if (ep->tx_credit_flow_enabled &&
704 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE)
705 return 0;
706
707 bundles_left = ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
708 bundle_skb = dev_alloc_skb(bundles_left);
709
710 if (!bundle_skb)
711 return -ENOMEM;
712
713 bundle_buf = bundle_skb->data;
714 skb_queue_head_init(&tx_save_head);
715
716 while (true) {
717 skb = skb_dequeue(&ep->tx_req_head);
718 if (!skb)
719 break;
720
721 credit_pad = 0;
722 trans_len = skb->len + sizeof(*hdr);
723 credit_remainder = trans_len % ep->tx_credit_size;
724
725 if (credit_remainder != 0) {
726 credit_pad = ep->tx_credit_size - credit_remainder;
727 trans_len += credit_pad;
728 }
729
730 ret = ath10k_htc_consume_credit(ep,
731 bundle_buf + trans_len - bundle_skb->data,
732 false);
733 if (ret) {
734 skb_queue_head(&ep->tx_req_head, skb);
735 break;
736 }
737
738 if (bundles_left < trans_len) {
739 bundle_skb->len = bundle_buf - bundle_skb->data;
740 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
741
742 if (ret) {
743 skb_queue_head(&ep->tx_req_head, skb);
744 return ret;
745 }
746
747 if (skb_queue_len(&ep->tx_req_head) == 0) {
748 ath10k_htc_send_one_skb(ep, skb);
749 return ret;
750 }
751
752 if (ep->tx_credit_flow_enabled &&
753 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE) {
754 skb_queue_head(&ep->tx_req_head, skb);
755 return 0;
756 }
757
758 bundles_left =
759 ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
760 bundle_skb = dev_alloc_skb(bundles_left);
761
762 if (!bundle_skb) {
763 skb_queue_head(&ep->tx_req_head, skb);
764 return -ENOMEM;
765 }
766 bundle_buf = bundle_skb->data;
767 skb_queue_head_init(&tx_save_head);
768 }
769
770 skb_push(skb, sizeof(struct ath10k_htc_hdr));
771 ath10k_htc_prepare_tx_skb(ep, skb);
772
773 memcpy(bundle_buf, skb->data, skb->len);
774 hdr = (struct ath10k_htc_hdr *)bundle_buf;
775 hdr->flags |= ATH10K_HTC_FLAG_SEND_BUNDLE;
776 hdr->pad_len = __cpu_to_le16(credit_pad);
777 bundle_buf += trans_len;
778 bundles_left -= trans_len;
779 skb_queue_tail(&tx_save_head, skb);
780 }
781
782 if (bundle_buf != bundle_skb->data) {
783 bundle_skb->len = bundle_buf - bundle_skb->data;
784 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
785 } else {
786 dev_kfree_skb_any(bundle_skb);
787 }
788
789 return ret;
790}
791
792static void ath10k_htc_bundle_tx_work(struct work_struct *work)
793{
794 struct ath10k *ar = container_of(work, struct ath10k, bundle_tx_work);
795 struct ath10k_htc_ep *ep;
796 struct sk_buff *skb;
797 int i;
798
799 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
800 ep = &ar->htc.endpoint[i];
801
802 if (!ep->bundle_tx)
803 continue;
804
805 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx work eid %d count %d\n",
806 ep->eid, skb_queue_len(&ep->tx_req_head));
807
808 if (skb_queue_len(&ep->tx_req_head) >=
809 ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE) {
810 ath10k_htc_send_bundle_skbs(ep);
811 } else {
812 skb = skb_dequeue(&ep->tx_req_head);
813
814 if (!skb)
815 continue;
816 ath10k_htc_send_one_skb(ep, skb);
817 }
818 }
819}
820
821static void ath10k_htc_tx_complete_work(struct work_struct *work)
822{
823 struct ath10k *ar = container_of(work, struct ath10k, tx_complete_work);
824 struct ath10k_htc_ep *ep;
825 enum ath10k_htc_ep_id eid;
826 struct sk_buff *skb;
827 int i;
828
829 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
830 ep = &ar->htc.endpoint[i];
831 eid = ep->eid;
832 if (ep->bundle_tx && eid == ar->htt.eid) {
833 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx complete eid %d pending complete count%d\n",
834 ep->eid, skb_queue_len(&ep->tx_complete_head));
835
836 while (true) {
837 skb = skb_dequeue(&ep->tx_complete_head);
838 if (!skb)
839 break;
840 ath10k_htc_notify_tx_completion(ep, skb);
841 }
842 }
843 }
844}
845
846int ath10k_htc_send_hl(struct ath10k_htc *htc,
847 enum ath10k_htc_ep_id eid,
848 struct sk_buff *skb)
849{
850 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
851 struct ath10k *ar = htc->ar;
852
853 if (sizeof(struct ath10k_htc_hdr) + skb->len > ep->tx_credit_size) {
854 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx exceed max len %d\n", skb->len);
855 return -ENOMEM;
856 }
857
858 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc send hl eid %d bundle %d tx count %d len %d\n",
859 eid, ep->bundle_tx, skb_queue_len(&ep->tx_req_head), skb->len);
860
861 if (ep->bundle_tx) {
862 skb_queue_tail(&ep->tx_req_head, skb);
863 queue_work(ar->workqueue, &ar->bundle_tx_work);
864 return 0;
865 } else {
866 return ath10k_htc_send(htc, eid, skb);
867 }
868}
869
870void ath10k_htc_setup_tx_req(struct ath10k_htc_ep *ep)
871{
872 if (ep->htc->max_msgs_per_htc_bundle >= ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE &&
873 !ep->bundle_tx) {
874 ep->bundle_tx = true;
875 skb_queue_head_init(&ep->tx_req_head);
876 skb_queue_head_init(&ep->tx_complete_head);
877 }
878}
879
880void ath10k_htc_stop_hl(struct ath10k *ar)
881{
882 struct ath10k_htc_ep *ep;
883 int i;
884
885 cancel_work_sync(&ar->bundle_tx_work);
886 cancel_work_sync(&ar->tx_complete_work);
887
888 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
889 ep = &ar->htc.endpoint[i];
890
891 if (!ep->bundle_tx)
892 continue;
893
894 ath10k_dbg(ar, ATH10K_DBG_HTC, "stop tx work eid %d count %d\n",
895 ep->eid, skb_queue_len(&ep->tx_req_head));
896
897 skb_queue_purge(&ep->tx_req_head);
898 }
899}
900
901int ath10k_htc_wait_target(struct ath10k_htc *htc)
902{
903 struct ath10k *ar = htc->ar;
904 int i, status = 0;
905 unsigned long time_left;
906 struct ath10k_htc_msg *msg;
907 u16 message_id;
908
909 time_left = wait_for_completion_timeout(&htc->ctl_resp,
910 ATH10K_HTC_WAIT_TIMEOUT_HZ);
911 if (!time_left) {
912
913
914
915
916
917
918 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
919
920 for (i = 0; i < CE_COUNT; i++)
921 ath10k_hif_send_complete_check(htc->ar, i, 1);
922
923 time_left =
924 wait_for_completion_timeout(&htc->ctl_resp,
925 ATH10K_HTC_WAIT_TIMEOUT_HZ);
926
927 if (!time_left)
928 status = -ETIMEDOUT;
929 }
930
931 if (status < 0) {
932 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
933 return status;
934 }
935
936 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
937 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
938 htc->control_resp_len);
939 return -ECOMM;
940 }
941
942 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
943 message_id = __le16_to_cpu(msg->hdr.message_id);
944
945 if (message_id != ATH10K_HTC_MSG_READY_ID) {
946 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
947 return -ECOMM;
948 }
949
950 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
951 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
952
953 ath10k_dbg(ar, ATH10K_DBG_HTC,
954 "Target ready! transmit resources: %d size:%d\n",
955 htc->total_transmit_credits,
956 htc->target_credit_size);
957
958 if ((htc->total_transmit_credits == 0) ||
959 (htc->target_credit_size == 0)) {
960 ath10k_err(ar, "Invalid credit size received\n");
961 return -ECOMM;
962 }
963
964
965
966
967 if (htc->control_resp_len >=
968 sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
969 htc->alt_data_credit_size =
970 __le16_to_cpu(msg->ready_ext.reserved) &
971 ATH10K_HTC_MSG_READY_EXT_ALT_DATA_MASK;
972 htc->max_msgs_per_htc_bundle =
973 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
974 HTC_HOST_MAX_MSG_PER_RX_BUNDLE);
975 ath10k_dbg(ar, ATH10K_DBG_HTC,
976 "Extended ready message RX bundle size %d alt size %d\n",
977 htc->max_msgs_per_htc_bundle,
978 htc->alt_data_credit_size);
979 }
980
981 INIT_WORK(&ar->bundle_tx_work, ath10k_htc_bundle_tx_work);
982 INIT_WORK(&ar->tx_complete_work, ath10k_htc_tx_complete_work);
983
984 return 0;
985}
986
987void ath10k_htc_change_tx_credit_flow(struct ath10k_htc *htc,
988 enum ath10k_htc_ep_id eid,
989 bool enable)
990{
991 struct ath10k *ar = htc->ar;
992 struct ath10k_htc_ep *ep = &ar->htc.endpoint[eid];
993
994 ep->tx_credit_flow_enabled = enable;
995}
996
997int ath10k_htc_connect_service(struct ath10k_htc *htc,
998 struct ath10k_htc_svc_conn_req *conn_req,
999 struct ath10k_htc_svc_conn_resp *conn_resp)
1000{
1001 struct ath10k *ar = htc->ar;
1002 struct ath10k_htc_msg *msg;
1003 struct ath10k_htc_conn_svc *req_msg;
1004 struct ath10k_htc_conn_svc_response resp_msg_dummy;
1005 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
1006 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
1007 struct ath10k_htc_ep *ep;
1008 struct sk_buff *skb;
1009 unsigned int max_msg_size = 0;
1010 int length, status;
1011 unsigned long time_left;
1012 bool disable_credit_flow_ctrl = false;
1013 u16 message_id, service_id, flags = 0;
1014 u8 tx_alloc = 0;
1015
1016
1017 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
1018 disable_credit_flow_ctrl = true;
1019 assigned_eid = ATH10K_HTC_EP_0;
1020 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
1021 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
1022 goto setup;
1023 }
1024
1025 tx_alloc = ath10k_htc_get_credit_allocation(htc,
1026 conn_req->service_id);
1027 if (!tx_alloc)
1028 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1029 "boot htc service %s does not allocate target credits\n",
1030 htc_service_name(conn_req->service_id));
1031
1032 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1033 if (!skb) {
1034 ath10k_err(ar, "Failed to allocate HTC packet\n");
1035 return -ENOMEM;
1036 }
1037
1038 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
1039 skb_put(skb, length);
1040 memset(skb->data, 0, length);
1041
1042 msg = (struct ath10k_htc_msg *)skb->data;
1043 msg->hdr.message_id =
1044 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
1045
1046 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
1047
1048
1049 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
1050 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
1051 disable_credit_flow_ctrl = true;
1052 }
1053
1054 req_msg = &msg->connect_service;
1055 req_msg->flags = __cpu_to_le16(flags);
1056 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
1057
1058 reinit_completion(&htc->ctl_resp);
1059
1060 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1061 if (status) {
1062 kfree_skb(skb);
1063 return status;
1064 }
1065
1066
1067 time_left = wait_for_completion_timeout(&htc->ctl_resp,
1068 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
1069 if (!time_left) {
1070 ath10k_err(ar, "Service connect timeout\n");
1071 return -ETIMEDOUT;
1072 }
1073
1074
1075 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
1076 resp_msg = &msg->connect_service_response;
1077 message_id = __le16_to_cpu(msg->hdr.message_id);
1078 service_id = __le16_to_cpu(resp_msg->service_id);
1079
1080 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
1081 (htc->control_resp_len < sizeof(msg->hdr) +
1082 sizeof(msg->connect_service_response))) {
1083 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
1084 return -EPROTO;
1085 }
1086
1087 ath10k_dbg(ar, ATH10K_DBG_HTC,
1088 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
1089 htc_service_name(service_id),
1090 resp_msg->status, resp_msg->eid);
1091
1092 conn_resp->connect_resp_code = resp_msg->status;
1093
1094
1095 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
1096 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
1097 htc_service_name(service_id),
1098 resp_msg->status);
1099 return -EPROTO;
1100 }
1101
1102 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
1103 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
1104
1105setup:
1106
1107 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
1108 return -EPROTO;
1109
1110 if (max_msg_size == 0)
1111 return -EPROTO;
1112
1113 ep = &htc->endpoint[assigned_eid];
1114 ep->eid = assigned_eid;
1115
1116 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
1117 return -EPROTO;
1118
1119
1120 conn_resp->eid = assigned_eid;
1121 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
1122
1123
1124 ep->service_id = conn_req->service_id;
1125 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
1126 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
1127 ep->tx_credits = tx_alloc;
1128 ep->tx_credit_size = htc->target_credit_size;
1129
1130 if (conn_req->service_id == ATH10K_HTC_SVC_ID_HTT_DATA_MSG &&
1131 htc->alt_data_credit_size != 0)
1132 ep->tx_credit_size = htc->alt_data_credit_size;
1133
1134
1135 ep->ep_ops = conn_req->ep_ops;
1136
1137 status = ath10k_hif_map_service_to_pipe(htc->ar,
1138 ep->service_id,
1139 &ep->ul_pipe_id,
1140 &ep->dl_pipe_id);
1141 if (status) {
1142 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC service id: %d\n",
1143 ep->service_id);
1144 return status;
1145 }
1146
1147 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1148 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
1149 htc_service_name(ep->service_id), ep->ul_pipe_id,
1150 ep->dl_pipe_id, ep->eid);
1151
1152 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
1153 ep->tx_credit_flow_enabled = false;
1154 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1155 "boot htc service '%s' eid %d TX flow control disabled\n",
1156 htc_service_name(ep->service_id), assigned_eid);
1157 }
1158
1159 return status;
1160}
1161
1162struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
1163{
1164 struct sk_buff *skb;
1165
1166 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
1167 if (!skb)
1168 return NULL;
1169
1170 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
1171
1172
1173 if (!IS_ALIGNED((unsigned long)skb->data, 4))
1174 ath10k_warn(ar, "Unaligned HTC tx skb\n");
1175
1176 return skb;
1177}
1178
1179static void ath10k_htc_pktlog_process_rx(struct ath10k *ar, struct sk_buff *skb)
1180{
1181 trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
1182 dev_kfree_skb_any(skb);
1183}
1184
1185static int ath10k_htc_pktlog_connect(struct ath10k *ar)
1186{
1187 struct ath10k_htc_svc_conn_resp conn_resp;
1188 struct ath10k_htc_svc_conn_req conn_req;
1189 int status;
1190
1191 memset(&conn_req, 0, sizeof(conn_req));
1192 memset(&conn_resp, 0, sizeof(conn_resp));
1193
1194 conn_req.ep_ops.ep_tx_complete = NULL;
1195 conn_req.ep_ops.ep_rx_complete = ath10k_htc_pktlog_process_rx;
1196 conn_req.ep_ops.ep_tx_credits = NULL;
1197
1198
1199 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_LOG_MSG;
1200 status = ath10k_htc_connect_service(&ar->htc, &conn_req, &conn_resp);
1201 if (status) {
1202 ath10k_warn(ar, "failed to connect to PKTLOG service: %d\n",
1203 status);
1204 return status;
1205 }
1206
1207 return 0;
1208}
1209
1210static bool ath10k_htc_pktlog_svc_supported(struct ath10k *ar)
1211{
1212 u8 ul_pipe_id;
1213 u8 dl_pipe_id;
1214 int status;
1215
1216 status = ath10k_hif_map_service_to_pipe(ar, ATH10K_HTC_SVC_ID_HTT_LOG_MSG,
1217 &ul_pipe_id,
1218 &dl_pipe_id);
1219 if (status) {
1220 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC pktlog service id: %d\n",
1221 ATH10K_HTC_SVC_ID_HTT_LOG_MSG);
1222
1223 return false;
1224 }
1225
1226 return true;
1227}
1228
1229int ath10k_htc_start(struct ath10k_htc *htc)
1230{
1231 struct ath10k *ar = htc->ar;
1232 struct sk_buff *skb;
1233 int status = 0;
1234 struct ath10k_htc_msg *msg;
1235
1236 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1237 if (!skb)
1238 return -ENOMEM;
1239
1240 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
1241 memset(skb->data, 0, skb->len);
1242
1243 msg = (struct ath10k_htc_msg *)skb->data;
1244 msg->hdr.message_id =
1245 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
1246
1247 if (ar->hif.bus == ATH10K_BUS_SDIO) {
1248
1249 msg->setup_complete_ext.flags =
1250 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN);
1251 msg->setup_complete_ext.max_msgs_per_bundled_recv =
1252 htc->max_msgs_per_htc_bundle;
1253 }
1254 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
1255
1256 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1257 if (status) {
1258 kfree_skb(skb);
1259 return status;
1260 }
1261
1262 if (ath10k_htc_pktlog_svc_supported(ar)) {
1263 status = ath10k_htc_pktlog_connect(ar);
1264 if (status) {
1265 ath10k_err(ar, "failed to connect to pktlog: %d\n", status);
1266 return status;
1267 }
1268 }
1269
1270 return 0;
1271}
1272
1273
1274int ath10k_htc_init(struct ath10k *ar)
1275{
1276 int status;
1277 struct ath10k_htc *htc = &ar->htc;
1278 struct ath10k_htc_svc_conn_req conn_req;
1279 struct ath10k_htc_svc_conn_resp conn_resp;
1280
1281 spin_lock_init(&htc->tx_lock);
1282
1283 ath10k_htc_reset_endpoint_states(htc);
1284
1285 htc->ar = ar;
1286
1287
1288 memset(&conn_req, 0, sizeof(conn_req));
1289 memset(&conn_resp, 0, sizeof(conn_resp));
1290 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
1291 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
1292 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
1293 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
1294
1295
1296 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
1297 if (status) {
1298 ath10k_err(ar, "could not connect to htc service (%d)\n",
1299 status);
1300 return status;
1301 }
1302
1303 init_completion(&htc->ctl_resp);
1304
1305 return 0;
1306}
1307
