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1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (c) 2005-2011 Atheros Communications Inc.
4 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
5 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
6 */
7
8#include "core.h"
9#include "hif.h"
10#include "debug.h"
11
12/********/
13/* Send */
14/********/
15
16static void ath10k_htc_control_tx_complete(struct ath10k *ar,
17 struct sk_buff *skb)
18{
19 kfree_skb(skb);
20}
21
22static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
23{
24 struct sk_buff *skb;
25 struct ath10k_skb_cb *skb_cb;
26
27 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
28 if (!skb)
29 return NULL;
30
31 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
32 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
33
34 skb_cb = ATH10K_SKB_CB(skb);
35 memset(skb_cb, 0, sizeof(*skb_cb));
36
37 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb);
38 return skb;
39}
40
41static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
42 struct sk_buff *skb)
43{
44 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
45
46 if (htc->ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
47 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
48 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
49}
50
51void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
52 struct sk_buff *skb)
53{
54 struct ath10k *ar = ep->htc->ar;
55 struct ath10k_htc_hdr *hdr;
56
57 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__,
58 ep->eid, skb);
59
60 /* A corner case where the copy completion is reaching to host but still
61 * copy engine is processing it due to which host unmaps corresponding
62 * memory and causes SMMU fault, hence as workaround adding delay
63 * the unmapping memory to avoid SMMU faults.
64 */
65 if (ar->hw_params.delay_unmap_buffer &&
66 ep->ul_pipe_id == 3)
67 mdelay(2);
68
69 hdr = (struct ath10k_htc_hdr *)skb->data;
70 ath10k_htc_restore_tx_skb(ep->htc, skb);
71
72 if (!ep->ep_ops.ep_tx_complete) {
73 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
74 dev_kfree_skb_any(skb);
75 return;
76 }
77
78 if (hdr->flags & ATH10K_HTC_FLAG_SEND_BUNDLE) {
79 dev_kfree_skb_any(skb);
80 return;
81 }
82
83 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
84}
85EXPORT_SYMBOL(ath10k_htc_notify_tx_completion);
86
87static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
88 struct sk_buff *skb)
89{
90 struct ath10k_htc_hdr *hdr;
91
92 hdr = (struct ath10k_htc_hdr *)skb->data;
93 memset(hdr, 0, sizeof(struct ath10k_htc_hdr));
94
95 hdr->eid = ep->eid;
96 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
97 hdr->flags = 0;
98 if (ep->tx_credit_flow_enabled && !ep->bundle_tx)
99 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
100
101 spin_lock_bh(&ep->htc->tx_lock);
102 hdr->seq_no = ep->seq_no++;
103 spin_unlock_bh(&ep->htc->tx_lock);
104}
105
106static int ath10k_htc_consume_credit(struct ath10k_htc_ep *ep,
107 unsigned int len,
108 bool consume)
109{
110 struct ath10k_htc *htc = ep->htc;
111 struct ath10k *ar = htc->ar;
112 enum ath10k_htc_ep_id eid = ep->eid;
113 int credits, ret = 0;
114
115 if (!ep->tx_credit_flow_enabled)
116 return 0;
117
118 credits = DIV_ROUND_UP(len, ep->tx_credit_size);
119 spin_lock_bh(&htc->tx_lock);
120
121 if (ep->tx_credits < credits) {
122 ath10k_dbg(ar, ATH10K_DBG_HTC,
123 "htc insufficient credits ep %d required %d available %d consume %d\n",
124 eid, credits, ep->tx_credits, consume);
125 ret = -EAGAIN;
126 goto unlock;
127 }
128
129 if (consume) {
130 ep->tx_credits -= credits;
131 ath10k_dbg(ar, ATH10K_DBG_HTC,
132 "htc ep %d consumed %d credits total %d\n",
133 eid, credits, ep->tx_credits);
134 }
135
136unlock:
137 spin_unlock_bh(&htc->tx_lock);
138 return ret;
139}
140
141static void ath10k_htc_release_credit(struct ath10k_htc_ep *ep, unsigned int len)
142{
143 struct ath10k_htc *htc = ep->htc;
144 struct ath10k *ar = htc->ar;
145 enum ath10k_htc_ep_id eid = ep->eid;
146 int credits;
147
148 if (!ep->tx_credit_flow_enabled)
149 return;
150
151 credits = DIV_ROUND_UP(len, ep->tx_credit_size);
152 spin_lock_bh(&htc->tx_lock);
153 ep->tx_credits += credits;
154 ath10k_dbg(ar, ATH10K_DBG_HTC,
155 "htc ep %d reverted %d credits back total %d\n",
156 eid, credits, ep->tx_credits);
157 spin_unlock_bh(&htc->tx_lock);
158
159 if (ep->ep_ops.ep_tx_credits)
160 ep->ep_ops.ep_tx_credits(htc->ar);
161}
162
163int ath10k_htc_send(struct ath10k_htc *htc,
164 enum ath10k_htc_ep_id eid,
165 struct sk_buff *skb)
166{
167 struct ath10k *ar = htc->ar;
168 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
169 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
170 struct ath10k_hif_sg_item sg_item;
171 struct device *dev = htc->ar->dev;
172 int ret;
173 unsigned int skb_len;
174
175 if (htc->ar->state == ATH10K_STATE_WEDGED)
176 return -ECOMM;
177
178 if (eid >= ATH10K_HTC_EP_COUNT) {
179 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
180 return -ENOENT;
181 }
182
183 skb_push(skb, sizeof(struct ath10k_htc_hdr));
184
185 skb_len = skb->len;
186 ret = ath10k_htc_consume_credit(ep, skb_len, true);
187 if (ret)
188 goto err_pull;
189
190 ath10k_htc_prepare_tx_skb(ep, skb);
191
192 skb_cb->eid = eid;
193 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
194 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len,
195 DMA_TO_DEVICE);
196 ret = dma_mapping_error(dev, skb_cb->paddr);
197 if (ret) {
198 ret = -EIO;
199 goto err_credits;
200 }
201 }
202
203 sg_item.transfer_id = ep->eid;
204 sg_item.transfer_context = skb;
205 sg_item.vaddr = skb->data;
206 sg_item.paddr = skb_cb->paddr;
207 sg_item.len = skb->len;
208
209 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
210 if (ret)
211 goto err_unmap;
212
213 return 0;
214
215err_unmap:
216 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
217 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
218err_credits:
219 ath10k_htc_release_credit(ep, skb_len);
220err_pull:
221 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
222 return ret;
223}
224
225void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
226{
227 struct ath10k_htc *htc = &ar->htc;
228 struct ath10k_skb_cb *skb_cb;
229 struct ath10k_htc_ep *ep;
230
231 if (WARN_ON_ONCE(!skb))
232 return;
233
234 skb_cb = ATH10K_SKB_CB(skb);
235 ep = &htc->endpoint[skb_cb->eid];
236
237 ath10k_htc_notify_tx_completion(ep, skb);
238 /* the skb now belongs to the completion handler */
239}
240EXPORT_SYMBOL(ath10k_htc_tx_completion_handler);
241
242/***********/
243/* Receive */
244/***********/
245
246static void
247ath10k_htc_process_credit_report(struct ath10k_htc *htc,
248 const struct ath10k_htc_credit_report *report,
249 int len,
250 enum ath10k_htc_ep_id eid)
251{
252 struct ath10k *ar = htc->ar;
253 struct ath10k_htc_ep *ep;
254 int i, n_reports;
255
256 if (len % sizeof(*report))
257 ath10k_warn(ar, "Uneven credit report len %d", len);
258
259 n_reports = len / sizeof(*report);
260
261 spin_lock_bh(&htc->tx_lock);
262 for (i = 0; i < n_reports; i++, report++) {
263 if (report->eid >= ATH10K_HTC_EP_COUNT)
264 break;
265
266 ep = &htc->endpoint[report->eid];
267 ep->tx_credits += report->credits;
268
269 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
270 report->eid, report->credits, ep->tx_credits);
271
272 if (ep->ep_ops.ep_tx_credits) {
273 spin_unlock_bh(&htc->tx_lock);
274 ep->ep_ops.ep_tx_credits(htc->ar);
275 spin_lock_bh(&htc->tx_lock);
276 }
277 }
278 spin_unlock_bh(&htc->tx_lock);
279}
280
281static int
282ath10k_htc_process_lookahead(struct ath10k_htc *htc,
283 const struct ath10k_htc_lookahead_report *report,
284 int len,
285 enum ath10k_htc_ep_id eid,
286 void *next_lookaheads,
287 int *next_lookaheads_len)
288{
289 struct ath10k *ar = htc->ar;
290
291 /* Invalid lookahead flags are actually transmitted by
292 * the target in the HTC control message.
293 * Since this will happen at every boot we silently ignore
294 * the lookahead in this case
295 */
296 if (report->pre_valid != ((~report->post_valid) & 0xFF))
297 return 0;
298
299 if (next_lookaheads && next_lookaheads_len) {
300 ath10k_dbg(ar, ATH10K_DBG_HTC,
301 "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n",
302 report->pre_valid, report->post_valid);
303
304 /* look ahead bytes are valid, copy them over */
305 memcpy((u8 *)next_lookaheads, report->lookahead, 4);
306
307 *next_lookaheads_len = 1;
308 }
309
310 return 0;
311}
312
313static int
314ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc,
315 const struct ath10k_htc_lookahead_bundle *report,
316 int len,
317 enum ath10k_htc_ep_id eid,
318 void *next_lookaheads,
319 int *next_lookaheads_len)
320{
321 struct ath10k *ar = htc->ar;
322 int bundle_cnt = len / sizeof(*report);
323
324 if (!bundle_cnt || (bundle_cnt > htc->max_msgs_per_htc_bundle)) {
325 ath10k_warn(ar, "Invalid lookahead bundle count: %d\n",
326 bundle_cnt);
327 return -EINVAL;
328 }
329
330 if (next_lookaheads && next_lookaheads_len) {
331 int i;
332
333 for (i = 0; i < bundle_cnt; i++) {
334 memcpy(((u8 *)next_lookaheads) + 4 * i,
335 report->lookahead, 4);
336 report++;
337 }
338
339 *next_lookaheads_len = bundle_cnt;
340 }
341
342 return 0;
343}
344
345int ath10k_htc_process_trailer(struct ath10k_htc *htc,
346 u8 *buffer,
347 int length,
348 enum ath10k_htc_ep_id src_eid,
349 void *next_lookaheads,
350 int *next_lookaheads_len)
351{
352 struct ath10k_htc_lookahead_bundle *bundle;
353 struct ath10k *ar = htc->ar;
354 int status = 0;
355 struct ath10k_htc_record *record;
356 u8 *orig_buffer;
357 int orig_length;
358 size_t len;
359
360 orig_buffer = buffer;
361 orig_length = length;
362
363 while (length > 0) {
364 record = (struct ath10k_htc_record *)buffer;
365
366 if (length < sizeof(record->hdr)) {
367 status = -EINVAL;
368 break;
369 }
370
371 if (record->hdr.len > length) {
372 /* no room left in buffer for record */
373 ath10k_warn(ar, "Invalid record length: %d\n",
374 record->hdr.len);
375 status = -EINVAL;
376 break;
377 }
378
379 switch (record->hdr.id) {
380 case ATH10K_HTC_RECORD_CREDITS:
381 len = sizeof(struct ath10k_htc_credit_report);
382 if (record->hdr.len < len) {
383 ath10k_warn(ar, "Credit report too long\n");
384 status = -EINVAL;
385 break;
386 }
387 ath10k_htc_process_credit_report(htc,
388 record->credit_report,
389 record->hdr.len,
390 src_eid);
391 break;
392 case ATH10K_HTC_RECORD_LOOKAHEAD:
393 len = sizeof(struct ath10k_htc_lookahead_report);
394 if (record->hdr.len < len) {
395 ath10k_warn(ar, "Lookahead report too long\n");
396 status = -EINVAL;
397 break;
398 }
399 status = ath10k_htc_process_lookahead(htc,
400 record->lookahead_report,
401 record->hdr.len,
402 src_eid,
403 next_lookaheads,
404 next_lookaheads_len);
405 break;
406 case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE:
407 bundle = record->lookahead_bundle;
408 status = ath10k_htc_process_lookahead_bundle(htc,
409 bundle,
410 record->hdr.len,
411 src_eid,
412 next_lookaheads,
413 next_lookaheads_len);
414 break;
415 default:
416 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
417 record->hdr.id, record->hdr.len);
418 break;
419 }
420
421 if (status)
422 break;
423
424 /* multiple records may be present in a trailer */
425 buffer += sizeof(record->hdr) + record->hdr.len;
426 length -= sizeof(record->hdr) + record->hdr.len;
427 }
428
429 if (status)
430 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
431 orig_buffer, orig_length);
432
433 return status;
434}
435EXPORT_SYMBOL(ath10k_htc_process_trailer);
436
437void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
438{
439 int status = 0;
440 struct ath10k_htc *htc = &ar->htc;
441 struct ath10k_htc_hdr *hdr;
442 struct ath10k_htc_ep *ep;
443 u16 payload_len;
444 u32 trailer_len = 0;
445 size_t min_len;
446 u8 eid;
447 bool trailer_present;
448
449 hdr = (struct ath10k_htc_hdr *)skb->data;
450 skb_pull(skb, sizeof(*hdr));
451
452 eid = hdr->eid;
453
454 if (eid >= ATH10K_HTC_EP_COUNT) {
455 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
456 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
457 hdr, sizeof(*hdr));
458 goto out;
459 }
460
461 ep = &htc->endpoint[eid];
462 if (ep->service_id == ATH10K_HTC_SVC_ID_UNUSED) {
463 ath10k_warn(ar, "htc rx endpoint %d is not connected\n", eid);
464 goto out;
465 }
466
467 payload_len = __le16_to_cpu(hdr->len);
468
469 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
470 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
471 payload_len + sizeof(*hdr));
472 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
473 hdr, sizeof(*hdr));
474 goto out;
475 }
476
477 if (skb->len < payload_len) {
478 ath10k_dbg(ar, ATH10K_DBG_HTC,
479 "HTC Rx: insufficient length, got %d, expected %d\n",
480 skb->len, payload_len);
481 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
482 "", hdr, sizeof(*hdr));
483 goto out;
484 }
485
486 /* get flags to check for trailer */
487 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
488 if (trailer_present) {
489 u8 *trailer;
490
491 trailer_len = hdr->trailer_len;
492 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
493
494 if ((trailer_len < min_len) ||
495 (trailer_len > payload_len)) {
496 ath10k_warn(ar, "Invalid trailer length: %d\n",
497 trailer_len);
498 goto out;
499 }
500
501 trailer = (u8 *)hdr;
502 trailer += sizeof(*hdr);
503 trailer += payload_len;
504 trailer -= trailer_len;
505 status = ath10k_htc_process_trailer(htc, trailer,
506 trailer_len, hdr->eid,
507 NULL, NULL);
508 if (status)
509 goto out;
510
511 skb_trim(skb, skb->len - trailer_len);
512 }
513
514 if (((int)payload_len - (int)trailer_len) <= 0)
515 /* zero length packet with trailer data, just drop these */
516 goto out;
517
518 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
519 eid, skb);
520 ep->ep_ops.ep_rx_complete(ar, skb);
521
522 /* skb is now owned by the rx completion handler */
523 skb = NULL;
524out:
525 kfree_skb(skb);
526}
527EXPORT_SYMBOL(ath10k_htc_rx_completion_handler);
528
529static void ath10k_htc_control_rx_complete(struct ath10k *ar,
530 struct sk_buff *skb)
531{
532 struct ath10k_htc *htc = &ar->htc;
533 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
534
535 switch (__le16_to_cpu(msg->hdr.message_id)) {
536 case ATH10K_HTC_MSG_READY_ID:
537 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
538 /* handle HTC control message */
539 if (completion_done(&htc->ctl_resp)) {
540 /* this is a fatal error, target should not be
541 * sending unsolicited messages on the ep 0
542 */
543 ath10k_warn(ar, "HTC rx ctrl still processing\n");
544 complete(&htc->ctl_resp);
545 goto out;
546 }
547
548 htc->control_resp_len =
549 min_t(int, skb->len,
550 ATH10K_HTC_MAX_CTRL_MSG_LEN);
551
552 memcpy(htc->control_resp_buffer, skb->data,
553 htc->control_resp_len);
554
555 complete(&htc->ctl_resp);
556 break;
557 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
558 htc->htc_ops.target_send_suspend_complete(ar);
559 break;
560 default:
561 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
562 break;
563 }
564
565out:
566 kfree_skb(skb);
567}
568
569/***************/
570/* Init/Deinit */
571/***************/
572
573static const char *htc_service_name(enum ath10k_htc_svc_id id)
574{
575 switch (id) {
576 case ATH10K_HTC_SVC_ID_RESERVED:
577 return "Reserved";
578 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
579 return "Control";
580 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
581 return "WMI";
582 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
583 return "DATA BE";
584 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
585 return "DATA BK";
586 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
587 return "DATA VI";
588 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
589 return "DATA VO";
590 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
591 return "NMI Control";
592 case ATH10K_HTC_SVC_ID_NMI_DATA:
593 return "NMI Data";
594 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
595 return "HTT Data";
596 case ATH10K_HTC_SVC_ID_HTT_DATA2_MSG:
597 return "HTT Data";
598 case ATH10K_HTC_SVC_ID_HTT_DATA3_MSG:
599 return "HTT Data";
600 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
601 return "RAW";
602 case ATH10K_HTC_SVC_ID_HTT_LOG_MSG:
603 return "PKTLOG";
604 }
605
606 return "Unknown";
607}
608
609static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
610{
611 struct ath10k_htc_ep *ep;
612 int i;
613
614 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
615 ep = &htc->endpoint[i];
616 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
617 ep->max_ep_message_len = 0;
618 ep->max_tx_queue_depth = 0;
619 ep->eid = i;
620 ep->htc = htc;
621 ep->tx_credit_flow_enabled = true;
622 }
623}
624
625static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
626 u16 service_id)
627{
628 u8 allocation = 0;
629
630 /* The WMI control service is the only service with flow control.
631 * Let it have all transmit credits.
632 */
633 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL)
634 allocation = htc->total_transmit_credits;
635
636 return allocation;
637}
638
639static int ath10k_htc_send_bundle(struct ath10k_htc_ep *ep,
640 struct sk_buff *bundle_skb,
641 struct sk_buff_head *tx_save_head)
642{
643 struct ath10k_hif_sg_item sg_item;
644 struct ath10k_htc *htc = ep->htc;
645 struct ath10k *ar = htc->ar;
646 struct sk_buff *skb;
647 int ret, cn = 0;
648 unsigned int skb_len;
649
650 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle skb len %d\n", bundle_skb->len);
651 skb_len = bundle_skb->len;
652 ret = ath10k_htc_consume_credit(ep, skb_len, true);
653
654 if (!ret) {
655 sg_item.transfer_id = ep->eid;
656 sg_item.transfer_context = bundle_skb;
657 sg_item.vaddr = bundle_skb->data;
658 sg_item.len = bundle_skb->len;
659
660 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
661 if (ret)
662 ath10k_htc_release_credit(ep, skb_len);
663 }
664
665 if (ret)
666 dev_kfree_skb_any(bundle_skb);
667
668 for (cn = 0; (skb = skb_dequeue_tail(tx_save_head)); cn++) {
669 if (ret) {
670 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
671 skb_queue_head(&ep->tx_req_head, skb);
672 } else {
673 skb_queue_tail(&ep->tx_complete_head, skb);
674 }
675 }
676
677 if (!ret)
678 queue_work(ar->workqueue_tx_complete, &ar->tx_complete_work);
679
680 ath10k_dbg(ar, ATH10K_DBG_HTC,
681 "bundle tx status %d eid %d req count %d count %d len %d\n",
682 ret, ep->eid, skb_queue_len(&ep->tx_req_head), cn, skb_len);
683 return ret;
684}
685
686static void ath10k_htc_send_one_skb(struct ath10k_htc_ep *ep, struct sk_buff *skb)
687{
688 struct ath10k_htc *htc = ep->htc;
689 struct ath10k *ar = htc->ar;
690 int ret;
691
692 ret = ath10k_htc_send(htc, ep->eid, skb);
693
694 if (ret)
695 skb_queue_head(&ep->tx_req_head, skb);
696
697 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx one status %d eid %d len %d pending count %d\n",
698 ret, ep->eid, skb->len, skb_queue_len(&ep->tx_req_head));
699}
700
701static int ath10k_htc_send_bundle_skbs(struct ath10k_htc_ep *ep)
702{
703 struct ath10k_htc *htc = ep->htc;
704 struct sk_buff *bundle_skb, *skb;
705 struct sk_buff_head tx_save_head;
706 struct ath10k_htc_hdr *hdr;
707 u8 *bundle_buf;
708 int ret = 0, credit_pad, credit_remainder, trans_len, bundles_left = 0;
709
710 if (htc->ar->state == ATH10K_STATE_WEDGED)
711 return -ECOMM;
712
713 if (ep->tx_credit_flow_enabled &&
714 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE)
715 return 0;
716
717 bundles_left = ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
718 bundle_skb = dev_alloc_skb(bundles_left);
719
720 if (!bundle_skb)
721 return -ENOMEM;
722
723 bundle_buf = bundle_skb->data;
724 skb_queue_head_init(&tx_save_head);
725
726 while (true) {
727 skb = skb_dequeue(&ep->tx_req_head);
728 if (!skb)
729 break;
730
731 credit_pad = 0;
732 trans_len = skb->len + sizeof(*hdr);
733 credit_remainder = trans_len % ep->tx_credit_size;
734
735 if (credit_remainder != 0) {
736 credit_pad = ep->tx_credit_size - credit_remainder;
737 trans_len += credit_pad;
738 }
739
740 ret = ath10k_htc_consume_credit(ep,
741 bundle_buf + trans_len - bundle_skb->data,
742 false);
743 if (ret) {
744 skb_queue_head(&ep->tx_req_head, skb);
745 break;
746 }
747
748 if (bundles_left < trans_len) {
749 bundle_skb->len = bundle_buf - bundle_skb->data;
750 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
751
752 if (ret) {
753 skb_queue_head(&ep->tx_req_head, skb);
754 return ret;
755 }
756
757 if (skb_queue_len(&ep->tx_req_head) == 0) {
758 ath10k_htc_send_one_skb(ep, skb);
759 return ret;
760 }
761
762 if (ep->tx_credit_flow_enabled &&
763 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE) {
764 skb_queue_head(&ep->tx_req_head, skb);
765 return 0;
766 }
767
768 bundles_left =
769 ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
770 bundle_skb = dev_alloc_skb(bundles_left);
771
772 if (!bundle_skb) {
773 skb_queue_head(&ep->tx_req_head, skb);
774 return -ENOMEM;
775 }
776 bundle_buf = bundle_skb->data;
777 skb_queue_head_init(&tx_save_head);
778 }
779
780 skb_push(skb, sizeof(struct ath10k_htc_hdr));
781 ath10k_htc_prepare_tx_skb(ep, skb);
782
783 memcpy(bundle_buf, skb->data, skb->len);
784 hdr = (struct ath10k_htc_hdr *)bundle_buf;
785 hdr->flags |= ATH10K_HTC_FLAG_SEND_BUNDLE;
786 hdr->pad_len = __cpu_to_le16(credit_pad);
787 bundle_buf += trans_len;
788 bundles_left -= trans_len;
789 skb_queue_tail(&tx_save_head, skb);
790 }
791
792 if (bundle_buf != bundle_skb->data) {
793 bundle_skb->len = bundle_buf - bundle_skb->data;
794 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
795 } else {
796 dev_kfree_skb_any(bundle_skb);
797 }
798
799 return ret;
800}
801
802static void ath10k_htc_bundle_tx_work(struct work_struct *work)
803{
804 struct ath10k *ar = container_of(work, struct ath10k, bundle_tx_work);
805 struct ath10k_htc_ep *ep;
806 struct sk_buff *skb;
807 int i;
808
809 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
810 ep = &ar->htc.endpoint[i];
811
812 if (!ep->bundle_tx)
813 continue;
814
815 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx work eid %d count %d\n",
816 ep->eid, skb_queue_len(&ep->tx_req_head));
817
818 if (skb_queue_len(&ep->tx_req_head) >=
819 ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE) {
820 ath10k_htc_send_bundle_skbs(ep);
821 } else {
822 skb = skb_dequeue(&ep->tx_req_head);
823
824 if (!skb)
825 continue;
826 ath10k_htc_send_one_skb(ep, skb);
827 }
828 }
829}
830
831static void ath10k_htc_tx_complete_work(struct work_struct *work)
832{
833 struct ath10k *ar = container_of(work, struct ath10k, tx_complete_work);
834 struct ath10k_htc_ep *ep;
835 enum ath10k_htc_ep_id eid;
836 struct sk_buff *skb;
837 int i;
838
839 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
840 ep = &ar->htc.endpoint[i];
841 eid = ep->eid;
842 if (ep->bundle_tx && eid == ar->htt.eid) {
843 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx complete eid %d pending complete count%d\n",
844 ep->eid, skb_queue_len(&ep->tx_complete_head));
845
846 while (true) {
847 skb = skb_dequeue(&ep->tx_complete_head);
848 if (!skb)
849 break;
850 ath10k_htc_notify_tx_completion(ep, skb);
851 }
852 }
853 }
854}
855
856int ath10k_htc_send_hl(struct ath10k_htc *htc,
857 enum ath10k_htc_ep_id eid,
858 struct sk_buff *skb)
859{
860 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
861 struct ath10k *ar = htc->ar;
862
863 if (sizeof(struct ath10k_htc_hdr) + skb->len > ep->tx_credit_size) {
864 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx exceed max len %d\n", skb->len);
865 return -ENOMEM;
866 }
867
868 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc send hl eid %d bundle %d tx count %d len %d\n",
869 eid, ep->bundle_tx, skb_queue_len(&ep->tx_req_head), skb->len);
870
871 if (ep->bundle_tx) {
872 skb_queue_tail(&ep->tx_req_head, skb);
873 queue_work(ar->workqueue, &ar->bundle_tx_work);
874 return 0;
875 } else {
876 return ath10k_htc_send(htc, eid, skb);
877 }
878}
879
880void ath10k_htc_setup_tx_req(struct ath10k_htc_ep *ep)
881{
882 if (ep->htc->max_msgs_per_htc_bundle >= ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE &&
883 !ep->bundle_tx) {
884 ep->bundle_tx = true;
885 skb_queue_head_init(&ep->tx_req_head);
886 skb_queue_head_init(&ep->tx_complete_head);
887 }
888}
889
890void ath10k_htc_stop_hl(struct ath10k *ar)
891{
892 struct ath10k_htc_ep *ep;
893 int i;
894
895 cancel_work_sync(&ar->bundle_tx_work);
896 cancel_work_sync(&ar->tx_complete_work);
897
898 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
899 ep = &ar->htc.endpoint[i];
900
901 if (!ep->bundle_tx)
902 continue;
903
904 ath10k_dbg(ar, ATH10K_DBG_HTC, "stop tx work eid %d count %d\n",
905 ep->eid, skb_queue_len(&ep->tx_req_head));
906
907 skb_queue_purge(&ep->tx_req_head);
908 }
909}
910
911int ath10k_htc_wait_target(struct ath10k_htc *htc)
912{
913 struct ath10k *ar = htc->ar;
914 int i, status = 0;
915 unsigned long time_left;
916 struct ath10k_htc_msg *msg;
917 u16 message_id;
918
919 time_left = wait_for_completion_timeout(&htc->ctl_resp,
920 ATH10K_HTC_WAIT_TIMEOUT_HZ);
921 if (!time_left) {
922 /* Workaround: In some cases the PCI HIF doesn't
923 * receive interrupt for the control response message
924 * even if the buffer was completed. It is suspected
925 * iomap writes unmasking PCI CE irqs aren't propagated
926 * properly in KVM PCI-passthrough sometimes.
927 */
928 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
929
930 for (i = 0; i < CE_COUNT; i++)
931 ath10k_hif_send_complete_check(htc->ar, i, 1);
932
933 time_left =
934 wait_for_completion_timeout(&htc->ctl_resp,
935 ATH10K_HTC_WAIT_TIMEOUT_HZ);
936
937 if (!time_left)
938 status = -ETIMEDOUT;
939 }
940
941 if (status < 0) {
942 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
943 return status;
944 }
945
946 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
947 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
948 htc->control_resp_len);
949 return -ECOMM;
950 }
951
952 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
953 message_id = __le16_to_cpu(msg->hdr.message_id);
954
955 if (message_id != ATH10K_HTC_MSG_READY_ID) {
956 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
957 return -ECOMM;
958 }
959
960 if (ar->hw_params.use_fw_tx_credits)
961 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
962 else
963 htc->total_transmit_credits = 1;
964
965 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
966
967 ath10k_dbg(ar, ATH10K_DBG_HTC,
968 "Target ready! transmit resources: %d size:%d actual credits:%d\n",
969 htc->total_transmit_credits,
970 htc->target_credit_size,
971 msg->ready.credit_count);
972
973 if ((htc->total_transmit_credits == 0) ||
974 (htc->target_credit_size == 0)) {
975 ath10k_err(ar, "Invalid credit size received\n");
976 return -ECOMM;
977 }
978
979 /* The only way to determine if the ready message is an extended
980 * message is from the size.
981 */
982 if (htc->control_resp_len >=
983 sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
984 htc->alt_data_credit_size =
985 __le16_to_cpu(msg->ready_ext.reserved) &
986 ATH10K_HTC_MSG_READY_EXT_ALT_DATA_MASK;
987 htc->max_msgs_per_htc_bundle =
988 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
989 HTC_HOST_MAX_MSG_PER_RX_BUNDLE);
990 ath10k_dbg(ar, ATH10K_DBG_HTC,
991 "Extended ready message RX bundle size %d alt size %d\n",
992 htc->max_msgs_per_htc_bundle,
993 htc->alt_data_credit_size);
994 }
995
996 INIT_WORK(&ar->bundle_tx_work, ath10k_htc_bundle_tx_work);
997 INIT_WORK(&ar->tx_complete_work, ath10k_htc_tx_complete_work);
998
999 return 0;
1000}
1001
1002void ath10k_htc_change_tx_credit_flow(struct ath10k_htc *htc,
1003 enum ath10k_htc_ep_id eid,
1004 bool enable)
1005{
1006 struct ath10k *ar = htc->ar;
1007 struct ath10k_htc_ep *ep = &ar->htc.endpoint[eid];
1008
1009 ep->tx_credit_flow_enabled = enable;
1010}
1011
1012int ath10k_htc_connect_service(struct ath10k_htc *htc,
1013 struct ath10k_htc_svc_conn_req *conn_req,
1014 struct ath10k_htc_svc_conn_resp *conn_resp)
1015{
1016 struct ath10k *ar = htc->ar;
1017 struct ath10k_htc_msg *msg;
1018 struct ath10k_htc_conn_svc *req_msg;
1019 struct ath10k_htc_conn_svc_response resp_msg_dummy;
1020 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
1021 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
1022 struct ath10k_htc_ep *ep;
1023 struct sk_buff *skb;
1024 unsigned int max_msg_size = 0;
1025 int length, status;
1026 unsigned long time_left;
1027 bool disable_credit_flow_ctrl = false;
1028 u16 message_id, service_id, flags = 0;
1029 u8 tx_alloc = 0;
1030
1031 /* special case for HTC pseudo control service */
1032 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
1033 disable_credit_flow_ctrl = true;
1034 assigned_eid = ATH10K_HTC_EP_0;
1035 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
1036 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
1037 goto setup;
1038 }
1039
1040 tx_alloc = ath10k_htc_get_credit_allocation(htc,
1041 conn_req->service_id);
1042 if (!tx_alloc)
1043 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1044 "boot htc service %s does not allocate target credits\n",
1045 htc_service_name(conn_req->service_id));
1046
1047 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1048 if (!skb) {
1049 ath10k_err(ar, "Failed to allocate HTC packet\n");
1050 return -ENOMEM;
1051 }
1052
1053 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
1054 skb_put(skb, length);
1055 memset(skb->data, 0, length);
1056
1057 msg = (struct ath10k_htc_msg *)skb->data;
1058 msg->hdr.message_id =
1059 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
1060
1061 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
1062
1063 /* Only enable credit flow control for WMI ctrl service */
1064 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
1065 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
1066 disable_credit_flow_ctrl = true;
1067 }
1068
1069 req_msg = &msg->connect_service;
1070 req_msg->flags = __cpu_to_le16(flags);
1071 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
1072
1073 reinit_completion(&htc->ctl_resp);
1074
1075 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1076 if (status) {
1077 kfree_skb(skb);
1078 return status;
1079 }
1080
1081 /* wait for response */
1082 time_left = wait_for_completion_timeout(&htc->ctl_resp,
1083 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
1084 if (!time_left) {
1085 ath10k_err(ar, "Service connect timeout\n");
1086 return -ETIMEDOUT;
1087 }
1088
1089 /* we controlled the buffer creation, it's aligned */
1090 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
1091 resp_msg = &msg->connect_service_response;
1092 message_id = __le16_to_cpu(msg->hdr.message_id);
1093 service_id = __le16_to_cpu(resp_msg->service_id);
1094
1095 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
1096 (htc->control_resp_len < sizeof(msg->hdr) +
1097 sizeof(msg->connect_service_response))) {
1098 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
1099 return -EPROTO;
1100 }
1101
1102 ath10k_dbg(ar, ATH10K_DBG_HTC,
1103 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
1104 htc_service_name(service_id),
1105 resp_msg->status, resp_msg->eid);
1106
1107 conn_resp->connect_resp_code = resp_msg->status;
1108
1109 /* check response status */
1110 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
1111 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
1112 htc_service_name(service_id),
1113 resp_msg->status);
1114 return -EPROTO;
1115 }
1116
1117 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
1118 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
1119
1120setup:
1121
1122 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
1123 return -EPROTO;
1124
1125 if (max_msg_size == 0)
1126 return -EPROTO;
1127
1128 ep = &htc->endpoint[assigned_eid];
1129 ep->eid = assigned_eid;
1130
1131 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
1132 return -EPROTO;
1133
1134 /* return assigned endpoint to caller */
1135 conn_resp->eid = assigned_eid;
1136 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
1137
1138 /* setup the endpoint */
1139 ep->service_id = conn_req->service_id;
1140 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
1141 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
1142 ep->tx_credits = tx_alloc;
1143 ep->tx_credit_size = htc->target_credit_size;
1144
1145 if (conn_req->service_id == ATH10K_HTC_SVC_ID_HTT_DATA_MSG &&
1146 htc->alt_data_credit_size != 0)
1147 ep->tx_credit_size = htc->alt_data_credit_size;
1148
1149 /* copy all the callbacks */
1150 ep->ep_ops = conn_req->ep_ops;
1151
1152 status = ath10k_hif_map_service_to_pipe(htc->ar,
1153 ep->service_id,
1154 &ep->ul_pipe_id,
1155 &ep->dl_pipe_id);
1156 if (status) {
1157 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC service id: %d\n",
1158 ep->service_id);
1159 return status;
1160 }
1161
1162 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1163 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
1164 htc_service_name(ep->service_id), ep->ul_pipe_id,
1165 ep->dl_pipe_id, ep->eid);
1166
1167 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
1168 ep->tx_credit_flow_enabled = false;
1169 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1170 "boot htc service '%s' eid %d TX flow control disabled\n",
1171 htc_service_name(ep->service_id), assigned_eid);
1172 }
1173
1174 return status;
1175}
1176
1177struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
1178{
1179 struct sk_buff *skb;
1180
1181 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
1182 if (!skb)
1183 return NULL;
1184
1185 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
1186
1187 /* FW/HTC requires 4-byte aligned streams */
1188 if (!IS_ALIGNED((unsigned long)skb->data, 4))
1189 ath10k_warn(ar, "Unaligned HTC tx skb\n");
1190
1191 return skb;
1192}
1193
1194static void ath10k_htc_pktlog_process_rx(struct ath10k *ar, struct sk_buff *skb)
1195{
1196 trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
1197 dev_kfree_skb_any(skb);
1198}
1199
1200static int ath10k_htc_pktlog_connect(struct ath10k *ar)
1201{
1202 struct ath10k_htc_svc_conn_resp conn_resp;
1203 struct ath10k_htc_svc_conn_req conn_req;
1204 int status;
1205
1206 memset(&conn_req, 0, sizeof(conn_req));
1207 memset(&conn_resp, 0, sizeof(conn_resp));
1208
1209 conn_req.ep_ops.ep_tx_complete = NULL;
1210 conn_req.ep_ops.ep_rx_complete = ath10k_htc_pktlog_process_rx;
1211 conn_req.ep_ops.ep_tx_credits = NULL;
1212
1213 /* connect to control service */
1214 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_LOG_MSG;
1215 status = ath10k_htc_connect_service(&ar->htc, &conn_req, &conn_resp);
1216 if (status) {
1217 ath10k_warn(ar, "failed to connect to PKTLOG service: %d\n",
1218 status);
1219 return status;
1220 }
1221
1222 return 0;
1223}
1224
1225static bool ath10k_htc_pktlog_svc_supported(struct ath10k *ar)
1226{
1227 u8 ul_pipe_id;
1228 u8 dl_pipe_id;
1229 int status;
1230
1231 status = ath10k_hif_map_service_to_pipe(ar, ATH10K_HTC_SVC_ID_HTT_LOG_MSG,
1232 &ul_pipe_id,
1233 &dl_pipe_id);
1234 if (status) {
1235 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC pktlog service id: %d\n",
1236 ATH10K_HTC_SVC_ID_HTT_LOG_MSG);
1237
1238 return false;
1239 }
1240
1241 return true;
1242}
1243
1244int ath10k_htc_start(struct ath10k_htc *htc)
1245{
1246 struct ath10k *ar = htc->ar;
1247 struct sk_buff *skb;
1248 int status = 0;
1249 struct ath10k_htc_msg *msg;
1250
1251 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1252 if (!skb)
1253 return -ENOMEM;
1254
1255 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
1256 memset(skb->data, 0, skb->len);
1257
1258 msg = (struct ath10k_htc_msg *)skb->data;
1259 msg->hdr.message_id =
1260 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
1261
1262 if (ar->hif.bus == ATH10K_BUS_SDIO) {
1263 /* Extra setup params used by SDIO */
1264 msg->setup_complete_ext.flags =
1265 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN);
1266 msg->setup_complete_ext.max_msgs_per_bundled_recv =
1267 htc->max_msgs_per_htc_bundle;
1268 }
1269 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
1270
1271 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1272 if (status) {
1273 kfree_skb(skb);
1274 return status;
1275 }
1276
1277 if (ath10k_htc_pktlog_svc_supported(ar)) {
1278 status = ath10k_htc_pktlog_connect(ar);
1279 if (status) {
1280 ath10k_err(ar, "failed to connect to pktlog: %d\n", status);
1281 return status;
1282 }
1283 }
1284
1285 return 0;
1286}
1287
1288/* registered target arrival callback from the HIF layer */
1289int ath10k_htc_init(struct ath10k *ar)
1290{
1291 int status;
1292 struct ath10k_htc *htc = &ar->htc;
1293 struct ath10k_htc_svc_conn_req conn_req;
1294 struct ath10k_htc_svc_conn_resp conn_resp;
1295
1296 spin_lock_init(&htc->tx_lock);
1297
1298 ath10k_htc_reset_endpoint_states(htc);
1299
1300 htc->ar = ar;
1301
1302 /* setup our pseudo HTC control endpoint connection */
1303 memset(&conn_req, 0, sizeof(conn_req));
1304 memset(&conn_resp, 0, sizeof(conn_resp));
1305 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
1306 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
1307 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
1308 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
1309
1310 /* connect fake service */
1311 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
1312 if (status) {
1313 ath10k_err(ar, "could not connect to htc service (%d)\n",
1314 status);
1315 return status;
1316 }
1317
1318 init_completion(&htc->ctl_resp);
1319
1320 return 0;
1321}
1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (c) 2005-2011 Atheros Communications Inc.
4 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
5 */
6
7#include "core.h"
8#include "hif.h"
9#include "debug.h"
10
11/********/
12/* Send */
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); /* FIXME: why 20 bytes? */
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 /* the skb now belongs to the completion handler */
229}
230EXPORT_SYMBOL(ath10k_htc_tx_completion_handler);
231
232/***********/
233/* Receive */
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 /* Invalid lookahead flags are actually transmitted by
282 * the target in the HTC control message.
283 * Since this will happen at every boot we silently ignore
284 * the lookahead in this case
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 /* look ahead bytes are valid, copy them over */
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 /* no room left in buffer for record */
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 /* multiple records may be present in a trailer */
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
453 payload_len = __le16_to_cpu(hdr->len);
454
455 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
456 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
457 payload_len + sizeof(*hdr));
458 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
459 hdr, sizeof(*hdr));
460 goto out;
461 }
462
463 if (skb->len < payload_len) {
464 ath10k_dbg(ar, ATH10K_DBG_HTC,
465 "HTC Rx: insufficient length, got %d, expected %d\n",
466 skb->len, payload_len);
467 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
468 "", hdr, sizeof(*hdr));
469 goto out;
470 }
471
472 /* get flags to check for trailer */
473 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
474 if (trailer_present) {
475 u8 *trailer;
476
477 trailer_len = hdr->trailer_len;
478 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
479
480 if ((trailer_len < min_len) ||
481 (trailer_len > payload_len)) {
482 ath10k_warn(ar, "Invalid trailer length: %d\n",
483 trailer_len);
484 goto out;
485 }
486
487 trailer = (u8 *)hdr;
488 trailer += sizeof(*hdr);
489 trailer += payload_len;
490 trailer -= trailer_len;
491 status = ath10k_htc_process_trailer(htc, trailer,
492 trailer_len, hdr->eid,
493 NULL, NULL);
494 if (status)
495 goto out;
496
497 skb_trim(skb, skb->len - trailer_len);
498 }
499
500 if (((int)payload_len - (int)trailer_len) <= 0)
501 /* zero length packet with trailer data, just drop these */
502 goto out;
503
504 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
505 eid, skb);
506 ep->ep_ops.ep_rx_complete(ar, skb);
507
508 /* skb is now owned by the rx completion handler */
509 skb = NULL;
510out:
511 kfree_skb(skb);
512}
513EXPORT_SYMBOL(ath10k_htc_rx_completion_handler);
514
515static void ath10k_htc_control_rx_complete(struct ath10k *ar,
516 struct sk_buff *skb)
517{
518 struct ath10k_htc *htc = &ar->htc;
519 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
520
521 switch (__le16_to_cpu(msg->hdr.message_id)) {
522 case ATH10K_HTC_MSG_READY_ID:
523 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
524 /* handle HTC control message */
525 if (completion_done(&htc->ctl_resp)) {
526 /* this is a fatal error, target should not be
527 * sending unsolicited messages on the ep 0
528 */
529 ath10k_warn(ar, "HTC rx ctrl still processing\n");
530 complete(&htc->ctl_resp);
531 goto out;
532 }
533
534 htc->control_resp_len =
535 min_t(int, skb->len,
536 ATH10K_HTC_MAX_CTRL_MSG_LEN);
537
538 memcpy(htc->control_resp_buffer, skb->data,
539 htc->control_resp_len);
540
541 complete(&htc->ctl_resp);
542 break;
543 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
544 htc->htc_ops.target_send_suspend_complete(ar);
545 break;
546 default:
547 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
548 break;
549 }
550
551out:
552 kfree_skb(skb);
553}
554
555/***************/
556/* Init/Deinit */
557/***************/
558
559static const char *htc_service_name(enum ath10k_htc_svc_id id)
560{
561 switch (id) {
562 case ATH10K_HTC_SVC_ID_RESERVED:
563 return "Reserved";
564 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
565 return "Control";
566 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
567 return "WMI";
568 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
569 return "DATA BE";
570 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
571 return "DATA BK";
572 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
573 return "DATA VI";
574 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
575 return "DATA VO";
576 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
577 return "NMI Control";
578 case ATH10K_HTC_SVC_ID_NMI_DATA:
579 return "NMI Data";
580 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
581 return "HTT Data";
582 case ATH10K_HTC_SVC_ID_HTT_DATA2_MSG:
583 return "HTT Data";
584 case ATH10K_HTC_SVC_ID_HTT_DATA3_MSG:
585 return "HTT Data";
586 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
587 return "RAW";
588 case ATH10K_HTC_SVC_ID_HTT_LOG_MSG:
589 return "PKTLOG";
590 }
591
592 return "Unknown";
593}
594
595static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
596{
597 struct ath10k_htc_ep *ep;
598 int i;
599
600 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
601 ep = &htc->endpoint[i];
602 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
603 ep->max_ep_message_len = 0;
604 ep->max_tx_queue_depth = 0;
605 ep->eid = i;
606 ep->htc = htc;
607 ep->tx_credit_flow_enabled = true;
608 }
609}
610
611static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
612 u16 service_id)
613{
614 u8 allocation = 0;
615
616 /* The WMI control service is the only service with flow control.
617 * Let it have all transmit credits.
618 */
619 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL)
620 allocation = htc->total_transmit_credits;
621
622 return allocation;
623}
624
625static int ath10k_htc_send_bundle(struct ath10k_htc_ep *ep,
626 struct sk_buff *bundle_skb,
627 struct sk_buff_head *tx_save_head)
628{
629 struct ath10k_hif_sg_item sg_item;
630 struct ath10k_htc *htc = ep->htc;
631 struct ath10k *ar = htc->ar;
632 struct sk_buff *skb;
633 int ret, cn = 0;
634 unsigned int skb_len;
635
636 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle skb len %d\n", bundle_skb->len);
637 skb_len = bundle_skb->len;
638 ret = ath10k_htc_consume_credit(ep, skb_len, true);
639
640 if (!ret) {
641 sg_item.transfer_id = ep->eid;
642 sg_item.transfer_context = bundle_skb;
643 sg_item.vaddr = bundle_skb->data;
644 sg_item.len = bundle_skb->len;
645
646 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
647 if (ret)
648 ath10k_htc_release_credit(ep, skb_len);
649 }
650
651 if (ret)
652 dev_kfree_skb_any(bundle_skb);
653
654 for (cn = 0; (skb = skb_dequeue_tail(tx_save_head)); cn++) {
655 if (ret) {
656 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
657 skb_queue_head(&ep->tx_req_head, skb);
658 } else {
659 skb_queue_tail(&ep->tx_complete_head, skb);
660 }
661 }
662
663 if (!ret)
664 queue_work(ar->workqueue_tx_complete, &ar->tx_complete_work);
665
666 ath10k_dbg(ar, ATH10K_DBG_HTC,
667 "bundle tx status %d eid %d req count %d count %d len %d\n",
668 ret, ep->eid, skb_queue_len(&ep->tx_req_head), cn, bundle_skb->len);
669 return ret;
670}
671
672static void ath10k_htc_send_one_skb(struct ath10k_htc_ep *ep, struct sk_buff *skb)
673{
674 struct ath10k_htc *htc = ep->htc;
675 struct ath10k *ar = htc->ar;
676 int ret;
677
678 ret = ath10k_htc_send(htc, ep->eid, skb);
679
680 if (ret)
681 skb_queue_head(&ep->tx_req_head, skb);
682
683 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx one status %d eid %d len %d pending count %d\n",
684 ret, ep->eid, skb->len, skb_queue_len(&ep->tx_req_head));
685}
686
687static int ath10k_htc_send_bundle_skbs(struct ath10k_htc_ep *ep)
688{
689 struct ath10k_htc *htc = ep->htc;
690 struct sk_buff *bundle_skb, *skb;
691 struct sk_buff_head tx_save_head;
692 struct ath10k_htc_hdr *hdr;
693 u8 *bundle_buf;
694 int ret = 0, credit_pad, credit_remainder, trans_len, bundles_left = 0;
695
696 if (htc->ar->state == ATH10K_STATE_WEDGED)
697 return -ECOMM;
698
699 if (ep->tx_credit_flow_enabled &&
700 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE)
701 return 0;
702
703 bundles_left = ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
704 bundle_skb = dev_alloc_skb(bundles_left);
705
706 if (!bundle_skb)
707 return -ENOMEM;
708
709 bundle_buf = bundle_skb->data;
710 skb_queue_head_init(&tx_save_head);
711
712 while (true) {
713 skb = skb_dequeue(&ep->tx_req_head);
714 if (!skb)
715 break;
716
717 credit_pad = 0;
718 trans_len = skb->len + sizeof(*hdr);
719 credit_remainder = trans_len % ep->tx_credit_size;
720
721 if (credit_remainder != 0) {
722 credit_pad = ep->tx_credit_size - credit_remainder;
723 trans_len += credit_pad;
724 }
725
726 ret = ath10k_htc_consume_credit(ep,
727 bundle_buf + trans_len - bundle_skb->data,
728 false);
729 if (ret) {
730 skb_queue_head(&ep->tx_req_head, skb);
731 break;
732 }
733
734 if (bundles_left < trans_len) {
735 bundle_skb->len = bundle_buf - bundle_skb->data;
736 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
737
738 if (ret) {
739 skb_queue_head(&ep->tx_req_head, skb);
740 return ret;
741 }
742
743 if (skb_queue_len(&ep->tx_req_head) == 0) {
744 ath10k_htc_send_one_skb(ep, skb);
745 return ret;
746 }
747
748 if (ep->tx_credit_flow_enabled &&
749 ep->tx_credits < ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE) {
750 skb_queue_head(&ep->tx_req_head, skb);
751 return 0;
752 }
753
754 bundles_left =
755 ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE * ep->tx_credit_size;
756 bundle_skb = dev_alloc_skb(bundles_left);
757
758 if (!bundle_skb) {
759 skb_queue_head(&ep->tx_req_head, skb);
760 return -ENOMEM;
761 }
762 bundle_buf = bundle_skb->data;
763 skb_queue_head_init(&tx_save_head);
764 }
765
766 skb_push(skb, sizeof(struct ath10k_htc_hdr));
767 ath10k_htc_prepare_tx_skb(ep, skb);
768
769 memcpy(bundle_buf, skb->data, skb->len);
770 hdr = (struct ath10k_htc_hdr *)bundle_buf;
771 hdr->flags |= ATH10K_HTC_FLAG_SEND_BUNDLE;
772 hdr->pad_len = __cpu_to_le16(credit_pad);
773 bundle_buf += trans_len;
774 bundles_left -= trans_len;
775 skb_queue_tail(&tx_save_head, skb);
776 }
777
778 if (bundle_buf != bundle_skb->data) {
779 bundle_skb->len = bundle_buf - bundle_skb->data;
780 ret = ath10k_htc_send_bundle(ep, bundle_skb, &tx_save_head);
781 } else {
782 dev_kfree_skb_any(bundle_skb);
783 }
784
785 return ret;
786}
787
788static void ath10k_htc_bundle_tx_work(struct work_struct *work)
789{
790 struct ath10k *ar = container_of(work, struct ath10k, bundle_tx_work);
791 struct ath10k_htc_ep *ep;
792 struct sk_buff *skb;
793 int i;
794
795 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
796 ep = &ar->htc.endpoint[i];
797
798 if (!ep->bundle_tx)
799 continue;
800
801 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx work eid %d count %d\n",
802 ep->eid, skb_queue_len(&ep->tx_req_head));
803
804 if (skb_queue_len(&ep->tx_req_head) >=
805 ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE) {
806 ath10k_htc_send_bundle_skbs(ep);
807 } else {
808 skb = skb_dequeue(&ep->tx_req_head);
809
810 if (!skb)
811 continue;
812 ath10k_htc_send_one_skb(ep, skb);
813 }
814 }
815}
816
817static void ath10k_htc_tx_complete_work(struct work_struct *work)
818{
819 struct ath10k *ar = container_of(work, struct ath10k, tx_complete_work);
820 struct ath10k_htc_ep *ep;
821 enum ath10k_htc_ep_id eid;
822 struct sk_buff *skb;
823 int i;
824
825 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
826 ep = &ar->htc.endpoint[i];
827 eid = ep->eid;
828 if (ep->bundle_tx && eid == ar->htt.eid) {
829 ath10k_dbg(ar, ATH10K_DBG_HTC, "bundle tx complete eid %d pending complete count%d\n",
830 ep->eid, skb_queue_len(&ep->tx_complete_head));
831
832 while (true) {
833 skb = skb_dequeue(&ep->tx_complete_head);
834 if (!skb)
835 break;
836 ath10k_htc_notify_tx_completion(ep, skb);
837 }
838 }
839 }
840}
841
842int ath10k_htc_send_hl(struct ath10k_htc *htc,
843 enum ath10k_htc_ep_id eid,
844 struct sk_buff *skb)
845{
846 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
847 struct ath10k *ar = htc->ar;
848
849 if (sizeof(struct ath10k_htc_hdr) + skb->len > ep->tx_credit_size) {
850 ath10k_dbg(ar, ATH10K_DBG_HTC, "tx exceed max len %d\n", skb->len);
851 return -ENOMEM;
852 }
853
854 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc send hl eid %d bundle %d tx count %d len %d\n",
855 eid, ep->bundle_tx, skb_queue_len(&ep->tx_req_head), skb->len);
856
857 if (ep->bundle_tx) {
858 skb_queue_tail(&ep->tx_req_head, skb);
859 queue_work(ar->workqueue, &ar->bundle_tx_work);
860 return 0;
861 } else {
862 return ath10k_htc_send(htc, eid, skb);
863 }
864}
865
866void ath10k_htc_setup_tx_req(struct ath10k_htc_ep *ep)
867{
868 if (ep->htc->max_msgs_per_htc_bundle >= ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE &&
869 !ep->bundle_tx) {
870 ep->bundle_tx = true;
871 skb_queue_head_init(&ep->tx_req_head);
872 skb_queue_head_init(&ep->tx_complete_head);
873 }
874}
875
876void ath10k_htc_stop_hl(struct ath10k *ar)
877{
878 struct ath10k_htc_ep *ep;
879 int i;
880
881 cancel_work_sync(&ar->bundle_tx_work);
882 cancel_work_sync(&ar->tx_complete_work);
883
884 for (i = 0; i < ARRAY_SIZE(ar->htc.endpoint); i++) {
885 ep = &ar->htc.endpoint[i];
886
887 if (!ep->bundle_tx)
888 continue;
889
890 ath10k_dbg(ar, ATH10K_DBG_HTC, "stop tx work eid %d count %d\n",
891 ep->eid, skb_queue_len(&ep->tx_req_head));
892
893 skb_queue_purge(&ep->tx_req_head);
894 }
895}
896
897int ath10k_htc_wait_target(struct ath10k_htc *htc)
898{
899 struct ath10k *ar = htc->ar;
900 int i, status = 0;
901 unsigned long time_left;
902 struct ath10k_htc_msg *msg;
903 u16 message_id;
904
905 time_left = wait_for_completion_timeout(&htc->ctl_resp,
906 ATH10K_HTC_WAIT_TIMEOUT_HZ);
907 if (!time_left) {
908 /* Workaround: In some cases the PCI HIF doesn't
909 * receive interrupt for the control response message
910 * even if the buffer was completed. It is suspected
911 * iomap writes unmasking PCI CE irqs aren't propagated
912 * properly in KVM PCI-passthrough sometimes.
913 */
914 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
915
916 for (i = 0; i < CE_COUNT; i++)
917 ath10k_hif_send_complete_check(htc->ar, i, 1);
918
919 time_left =
920 wait_for_completion_timeout(&htc->ctl_resp,
921 ATH10K_HTC_WAIT_TIMEOUT_HZ);
922
923 if (!time_left)
924 status = -ETIMEDOUT;
925 }
926
927 if (status < 0) {
928 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
929 return status;
930 }
931
932 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
933 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
934 htc->control_resp_len);
935 return -ECOMM;
936 }
937
938 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
939 message_id = __le16_to_cpu(msg->hdr.message_id);
940
941 if (message_id != ATH10K_HTC_MSG_READY_ID) {
942 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
943 return -ECOMM;
944 }
945
946 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
947 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
948
949 ath10k_dbg(ar, ATH10K_DBG_HTC,
950 "Target ready! transmit resources: %d size:%d\n",
951 htc->total_transmit_credits,
952 htc->target_credit_size);
953
954 if ((htc->total_transmit_credits == 0) ||
955 (htc->target_credit_size == 0)) {
956 ath10k_err(ar, "Invalid credit size received\n");
957 return -ECOMM;
958 }
959
960 /* The only way to determine if the ready message is an extended
961 * message is from the size.
962 */
963 if (htc->control_resp_len >=
964 sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
965 htc->alt_data_credit_size =
966 __le16_to_cpu(msg->ready_ext.reserved) &
967 ATH10K_HTC_MSG_READY_EXT_ALT_DATA_MASK;
968 htc->max_msgs_per_htc_bundle =
969 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
970 HTC_HOST_MAX_MSG_PER_RX_BUNDLE);
971 ath10k_dbg(ar, ATH10K_DBG_HTC,
972 "Extended ready message RX bundle size %d alt size %d\n",
973 htc->max_msgs_per_htc_bundle,
974 htc->alt_data_credit_size);
975 }
976
977 INIT_WORK(&ar->bundle_tx_work, ath10k_htc_bundle_tx_work);
978 INIT_WORK(&ar->tx_complete_work, ath10k_htc_tx_complete_work);
979
980 return 0;
981}
982
983void ath10k_htc_change_tx_credit_flow(struct ath10k_htc *htc,
984 enum ath10k_htc_ep_id eid,
985 bool enable)
986{
987 struct ath10k *ar = htc->ar;
988 struct ath10k_htc_ep *ep = &ar->htc.endpoint[eid];
989
990 ep->tx_credit_flow_enabled = enable;
991}
992
993int ath10k_htc_connect_service(struct ath10k_htc *htc,
994 struct ath10k_htc_svc_conn_req *conn_req,
995 struct ath10k_htc_svc_conn_resp *conn_resp)
996{
997 struct ath10k *ar = htc->ar;
998 struct ath10k_htc_msg *msg;
999 struct ath10k_htc_conn_svc *req_msg;
1000 struct ath10k_htc_conn_svc_response resp_msg_dummy;
1001 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
1002 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
1003 struct ath10k_htc_ep *ep;
1004 struct sk_buff *skb;
1005 unsigned int max_msg_size = 0;
1006 int length, status;
1007 unsigned long time_left;
1008 bool disable_credit_flow_ctrl = false;
1009 u16 message_id, service_id, flags = 0;
1010 u8 tx_alloc = 0;
1011
1012 /* special case for HTC pseudo control service */
1013 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
1014 disable_credit_flow_ctrl = true;
1015 assigned_eid = ATH10K_HTC_EP_0;
1016 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
1017 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
1018 goto setup;
1019 }
1020
1021 tx_alloc = ath10k_htc_get_credit_allocation(htc,
1022 conn_req->service_id);
1023 if (!tx_alloc)
1024 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1025 "boot htc service %s does not allocate target credits\n",
1026 htc_service_name(conn_req->service_id));
1027
1028 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1029 if (!skb) {
1030 ath10k_err(ar, "Failed to allocate HTC packet\n");
1031 return -ENOMEM;
1032 }
1033
1034 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
1035 skb_put(skb, length);
1036 memset(skb->data, 0, length);
1037
1038 msg = (struct ath10k_htc_msg *)skb->data;
1039 msg->hdr.message_id =
1040 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
1041
1042 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
1043
1044 /* Only enable credit flow control for WMI ctrl service */
1045 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
1046 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
1047 disable_credit_flow_ctrl = true;
1048 }
1049
1050 req_msg = &msg->connect_service;
1051 req_msg->flags = __cpu_to_le16(flags);
1052 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
1053
1054 reinit_completion(&htc->ctl_resp);
1055
1056 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1057 if (status) {
1058 kfree_skb(skb);
1059 return status;
1060 }
1061
1062 /* wait for response */
1063 time_left = wait_for_completion_timeout(&htc->ctl_resp,
1064 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
1065 if (!time_left) {
1066 ath10k_err(ar, "Service connect timeout\n");
1067 return -ETIMEDOUT;
1068 }
1069
1070 /* we controlled the buffer creation, it's aligned */
1071 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
1072 resp_msg = &msg->connect_service_response;
1073 message_id = __le16_to_cpu(msg->hdr.message_id);
1074 service_id = __le16_to_cpu(resp_msg->service_id);
1075
1076 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
1077 (htc->control_resp_len < sizeof(msg->hdr) +
1078 sizeof(msg->connect_service_response))) {
1079 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
1080 return -EPROTO;
1081 }
1082
1083 ath10k_dbg(ar, ATH10K_DBG_HTC,
1084 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
1085 htc_service_name(service_id),
1086 resp_msg->status, resp_msg->eid);
1087
1088 conn_resp->connect_resp_code = resp_msg->status;
1089
1090 /* check response status */
1091 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
1092 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
1093 htc_service_name(service_id),
1094 resp_msg->status);
1095 return -EPROTO;
1096 }
1097
1098 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
1099 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
1100
1101setup:
1102
1103 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
1104 return -EPROTO;
1105
1106 if (max_msg_size == 0)
1107 return -EPROTO;
1108
1109 ep = &htc->endpoint[assigned_eid];
1110 ep->eid = assigned_eid;
1111
1112 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
1113 return -EPROTO;
1114
1115 /* return assigned endpoint to caller */
1116 conn_resp->eid = assigned_eid;
1117 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
1118
1119 /* setup the endpoint */
1120 ep->service_id = conn_req->service_id;
1121 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
1122 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
1123 ep->tx_credits = tx_alloc;
1124 ep->tx_credit_size = htc->target_credit_size;
1125
1126 if (conn_req->service_id == ATH10K_HTC_SVC_ID_HTT_DATA_MSG &&
1127 htc->alt_data_credit_size != 0)
1128 ep->tx_credit_size = htc->alt_data_credit_size;
1129
1130 /* copy all the callbacks */
1131 ep->ep_ops = conn_req->ep_ops;
1132
1133 status = ath10k_hif_map_service_to_pipe(htc->ar,
1134 ep->service_id,
1135 &ep->ul_pipe_id,
1136 &ep->dl_pipe_id);
1137 if (status) {
1138 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC service id: %d\n",
1139 ep->service_id);
1140 return status;
1141 }
1142
1143 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1144 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
1145 htc_service_name(ep->service_id), ep->ul_pipe_id,
1146 ep->dl_pipe_id, ep->eid);
1147
1148 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
1149 ep->tx_credit_flow_enabled = false;
1150 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1151 "boot htc service '%s' eid %d TX flow control disabled\n",
1152 htc_service_name(ep->service_id), assigned_eid);
1153 }
1154
1155 return status;
1156}
1157
1158struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
1159{
1160 struct sk_buff *skb;
1161
1162 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
1163 if (!skb)
1164 return NULL;
1165
1166 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
1167
1168 /* FW/HTC requires 4-byte aligned streams */
1169 if (!IS_ALIGNED((unsigned long)skb->data, 4))
1170 ath10k_warn(ar, "Unaligned HTC tx skb\n");
1171
1172 return skb;
1173}
1174
1175static void ath10k_htc_pktlog_process_rx(struct ath10k *ar, struct sk_buff *skb)
1176{
1177 trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
1178 dev_kfree_skb_any(skb);
1179}
1180
1181static int ath10k_htc_pktlog_connect(struct ath10k *ar)
1182{
1183 struct ath10k_htc_svc_conn_resp conn_resp;
1184 struct ath10k_htc_svc_conn_req conn_req;
1185 int status;
1186
1187 memset(&conn_req, 0, sizeof(conn_req));
1188 memset(&conn_resp, 0, sizeof(conn_resp));
1189
1190 conn_req.ep_ops.ep_tx_complete = NULL;
1191 conn_req.ep_ops.ep_rx_complete = ath10k_htc_pktlog_process_rx;
1192 conn_req.ep_ops.ep_tx_credits = NULL;
1193
1194 /* connect to control service */
1195 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_LOG_MSG;
1196 status = ath10k_htc_connect_service(&ar->htc, &conn_req, &conn_resp);
1197 if (status) {
1198 ath10k_warn(ar, "failed to connect to PKTLOG service: %d\n",
1199 status);
1200 return status;
1201 }
1202
1203 return 0;
1204}
1205
1206static bool ath10k_htc_pktlog_svc_supported(struct ath10k *ar)
1207{
1208 u8 ul_pipe_id;
1209 u8 dl_pipe_id;
1210 int status;
1211
1212 status = ath10k_hif_map_service_to_pipe(ar, ATH10K_HTC_SVC_ID_HTT_LOG_MSG,
1213 &ul_pipe_id,
1214 &dl_pipe_id);
1215 if (status) {
1216 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC pktlog service id: %d\n",
1217 ATH10K_HTC_SVC_ID_HTT_LOG_MSG);
1218
1219 return false;
1220 }
1221
1222 return true;
1223}
1224
1225int ath10k_htc_start(struct ath10k_htc *htc)
1226{
1227 struct ath10k *ar = htc->ar;
1228 struct sk_buff *skb;
1229 int status = 0;
1230 struct ath10k_htc_msg *msg;
1231
1232 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
1233 if (!skb)
1234 return -ENOMEM;
1235
1236 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
1237 memset(skb->data, 0, skb->len);
1238
1239 msg = (struct ath10k_htc_msg *)skb->data;
1240 msg->hdr.message_id =
1241 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
1242
1243 if (ar->hif.bus == ATH10K_BUS_SDIO) {
1244 /* Extra setup params used by SDIO */
1245 msg->setup_complete_ext.flags =
1246 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN);
1247 msg->setup_complete_ext.max_msgs_per_bundled_recv =
1248 htc->max_msgs_per_htc_bundle;
1249 }
1250 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
1251
1252 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
1253 if (status) {
1254 kfree_skb(skb);
1255 return status;
1256 }
1257
1258 if (ath10k_htc_pktlog_svc_supported(ar)) {
1259 status = ath10k_htc_pktlog_connect(ar);
1260 if (status) {
1261 ath10k_err(ar, "failed to connect to pktlog: %d\n", status);
1262 return status;
1263 }
1264 }
1265
1266 return 0;
1267}
1268
1269/* registered target arrival callback from the HIF layer */
1270int ath10k_htc_init(struct ath10k *ar)
1271{
1272 int status;
1273 struct ath10k_htc *htc = &ar->htc;
1274 struct ath10k_htc_svc_conn_req conn_req;
1275 struct ath10k_htc_svc_conn_resp conn_resp;
1276
1277 spin_lock_init(&htc->tx_lock);
1278
1279 ath10k_htc_reset_endpoint_states(htc);
1280
1281 htc->ar = ar;
1282
1283 /* setup our pseudo HTC control endpoint connection */
1284 memset(&conn_req, 0, sizeof(conn_req));
1285 memset(&conn_resp, 0, sizeof(conn_resp));
1286 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
1287 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
1288 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
1289 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
1290
1291 /* connect fake service */
1292 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
1293 if (status) {
1294 ath10k_err(ar, "could not connect to htc service (%d)\n",
1295 status);
1296 return status;
1297 }
1298
1299 init_completion(&htc->ctl_resp);
1300
1301 return 0;
1302}