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1// SPDX-License-Identifier: BSD-3-Clause-Clear
2/*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5#include <linux/skbuff.h>
6#include <linux/ctype.h>
7
8#include "debug.h"
9#include "hif.h"
10
11struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ab, int size)
12{
13 struct sk_buff *skb;
14
15 skb = dev_alloc_skb(size + sizeof(struct ath11k_htc_hdr));
16 if (!skb)
17 return NULL;
18
19 skb_reserve(skb, sizeof(struct ath11k_htc_hdr));
20
21 /* FW/HTC requires 4-byte aligned streams */
22 if (!IS_ALIGNED((unsigned long)skb->data, 4))
23 ath11k_warn(ab, "Unaligned HTC tx skb\n");
24
25 return skb;
26}
27
28static void ath11k_htc_control_tx_complete(struct ath11k_base *ab,
29 struct sk_buff *skb)
30{
31 kfree_skb(skb);
32}
33
34static struct sk_buff *ath11k_htc_build_tx_ctrl_skb(void *ab)
35{
36 struct sk_buff *skb;
37 struct ath11k_skb_cb *skb_cb;
38
39 skb = dev_alloc_skb(ATH11K_HTC_CONTROL_BUFFER_SIZE);
40 if (!skb)
41 return NULL;
42
43 skb_reserve(skb, sizeof(struct ath11k_htc_hdr));
44 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4));
45
46 skb_cb = ATH11K_SKB_CB(skb);
47 memset(skb_cb, 0, sizeof(*skb_cb));
48
49 ath11k_dbg(ab, ATH11K_DBG_HTC, "%s: skb %pK\n", __func__, skb);
50 return skb;
51}
52
53static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep,
54 struct sk_buff *skb)
55{
56 struct ath11k_htc_hdr *hdr;
57
58 hdr = (struct ath11k_htc_hdr *)skb->data;
59
60 memset(hdr, 0, sizeof(*hdr));
61 hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) |
62 FIELD_PREP(HTC_HDR_PAYLOADLEN,
63 (skb->len - sizeof(*hdr)));
64
65 if (ep->tx_credit_flow_enabled)
66 hdr->htc_info |= FIELD_PREP(HTC_HDR_FLAGS,
67 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE);
68
69 spin_lock_bh(&ep->htc->tx_lock);
70 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++);
71 spin_unlock_bh(&ep->htc->tx_lock);
72}
73
74int ath11k_htc_send(struct ath11k_htc *htc,
75 enum ath11k_htc_ep_id eid,
76 struct sk_buff *skb)
77{
78 struct ath11k_htc_ep *ep = &htc->endpoint[eid];
79 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb);
80 struct device *dev = htc->ab->dev;
81 struct ath11k_base *ab = htc->ab;
82 int credits = 0;
83 int ret;
84
85 if (eid >= ATH11K_HTC_EP_COUNT) {
86 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid);
87 return -ENOENT;
88 }
89
90 skb_push(skb, sizeof(struct ath11k_htc_hdr));
91
92 if (ep->tx_credit_flow_enabled) {
93 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
94 spin_lock_bh(&htc->tx_lock);
95 if (ep->tx_credits < credits) {
96 ath11k_dbg(ab, ATH11K_DBG_HTC,
97 "htc insufficient credits ep %d required %d available %d\n",
98 eid, credits, ep->tx_credits);
99 spin_unlock_bh(&htc->tx_lock);
100 ret = -EAGAIN;
101 goto err_pull;
102 }
103 ep->tx_credits -= credits;
104 ath11k_dbg(ab, ATH11K_DBG_HTC,
105 "htc ep %d consumed %d credits (total %d)\n",
106 eid, credits, ep->tx_credits);
107 spin_unlock_bh(&htc->tx_lock);
108 }
109
110 ath11k_htc_prepare_tx_skb(ep, skb);
111
112 skb_cb->eid = eid;
113 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
114 ret = dma_mapping_error(dev, skb_cb->paddr);
115 if (ret) {
116 ret = -EIO;
117 goto err_credits;
118 }
119
120 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid);
121 if (ret)
122 goto err_unmap;
123
124 return 0;
125
126err_unmap:
127 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
128err_credits:
129 if (ep->tx_credit_flow_enabled) {
130 spin_lock_bh(&htc->tx_lock);
131 ep->tx_credits += credits;
132 ath11k_dbg(ab, ATH11K_DBG_HTC,
133 "htc ep %d reverted %d credits back (total %d)\n",
134 eid, credits, ep->tx_credits);
135 spin_unlock_bh(&htc->tx_lock);
136
137 if (ep->ep_ops.ep_tx_credits)
138 ep->ep_ops.ep_tx_credits(htc->ab);
139 }
140err_pull:
141 skb_pull(skb, sizeof(struct ath11k_htc_hdr));
142 return ret;
143}
144
145static void
146ath11k_htc_process_credit_report(struct ath11k_htc *htc,
147 const struct ath11k_htc_credit_report *report,
148 int len,
149 enum ath11k_htc_ep_id eid)
150{
151 struct ath11k_base *ab = htc->ab;
152 struct ath11k_htc_ep *ep;
153 int i, n_reports;
154
155 if (len % sizeof(*report))
156 ath11k_warn(ab, "Uneven credit report len %d", len);
157
158 n_reports = len / sizeof(*report);
159
160 spin_lock_bh(&htc->tx_lock);
161 for (i = 0; i < n_reports; i++, report++) {
162 if (report->eid >= ATH11K_HTC_EP_COUNT)
163 break;
164
165 ep = &htc->endpoint[report->eid];
166 ep->tx_credits += report->credits;
167
168 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
169 report->eid, report->credits, ep->tx_credits);
170
171 if (ep->ep_ops.ep_tx_credits) {
172 spin_unlock_bh(&htc->tx_lock);
173 ep->ep_ops.ep_tx_credits(htc->ab);
174 spin_lock_bh(&htc->tx_lock);
175 }
176 }
177 spin_unlock_bh(&htc->tx_lock);
178}
179
180static int ath11k_htc_process_trailer(struct ath11k_htc *htc,
181 u8 *buffer,
182 int length,
183 enum ath11k_htc_ep_id src_eid)
184{
185 struct ath11k_base *ab = htc->ab;
186 int status = 0;
187 struct ath11k_htc_record *record;
188 size_t len;
189
190 while (length > 0) {
191 record = (struct ath11k_htc_record *)buffer;
192
193 if (length < sizeof(record->hdr)) {
194 status = -EINVAL;
195 break;
196 }
197
198 if (record->hdr.len > length) {
199 /* no room left in buffer for record */
200 ath11k_warn(ab, "Invalid record length: %d\n",
201 record->hdr.len);
202 status = -EINVAL;
203 break;
204 }
205
206 switch (record->hdr.id) {
207 case ATH11K_HTC_RECORD_CREDITS:
208 len = sizeof(struct ath11k_htc_credit_report);
209 if (record->hdr.len < len) {
210 ath11k_warn(ab, "Credit report too long\n");
211 status = -EINVAL;
212 break;
213 }
214 ath11k_htc_process_credit_report(htc,
215 record->credit_report,
216 record->hdr.len,
217 src_eid);
218 break;
219 default:
220 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n",
221 record->hdr.id, record->hdr.len);
222 break;
223 }
224
225 if (status)
226 break;
227
228 /* multiple records may be present in a trailer */
229 buffer += sizeof(record->hdr) + record->hdr.len;
230 length -= sizeof(record->hdr) + record->hdr.len;
231 }
232
233 return status;
234}
235
236static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack)
237{
238 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot suspend complete %d\n", ack);
239
240 if (ack)
241 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
242 else
243 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
244
245 complete(&ab->htc_suspend);
246}
247
248void ath11k_htc_rx_completion_handler(struct ath11k_base *ab,
249 struct sk_buff *skb)
250{
251 int status = 0;
252 struct ath11k_htc *htc = &ab->htc;
253 struct ath11k_htc_hdr *hdr;
254 struct ath11k_htc_ep *ep;
255 u16 payload_len;
256 u32 trailer_len = 0;
257 size_t min_len;
258 u8 eid;
259 bool trailer_present;
260
261 hdr = (struct ath11k_htc_hdr *)skb->data;
262 skb_pull(skb, sizeof(*hdr));
263
264 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info);
265
266 if (eid >= ATH11K_HTC_EP_COUNT) {
267 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid);
268 goto out;
269 }
270
271 ep = &htc->endpoint[eid];
272
273 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info);
274
275 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) {
276 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n",
277 payload_len + sizeof(*hdr));
278 goto out;
279 }
280
281 if (skb->len < payload_len) {
282 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n",
283 skb->len, payload_len);
284 goto out;
285 }
286
287 /* get flags to check for trailer */
288 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) &
289 ATH11K_HTC_FLAG_TRAILER_PRESENT;
290
291 if (trailer_present) {
292 u8 *trailer;
293
294 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info);
295 min_len = sizeof(struct ath11k_htc_record_hdr);
296
297 if ((trailer_len < min_len) ||
298 (trailer_len > payload_len)) {
299 ath11k_warn(ab, "Invalid trailer length: %d\n",
300 trailer_len);
301 goto out;
302 }
303
304 trailer = (u8 *)hdr;
305 trailer += sizeof(*hdr);
306 trailer += payload_len;
307 trailer -= trailer_len;
308 status = ath11k_htc_process_trailer(htc, trailer,
309 trailer_len, eid);
310 if (status)
311 goto out;
312
313 skb_trim(skb, skb->len - trailer_len);
314 }
315
316 if (trailer_len >= payload_len)
317 /* zero length packet with trailer data, just drop these */
318 goto out;
319
320 if (eid == ATH11K_HTC_EP_0) {
321 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data;
322
323 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) {
324 case ATH11K_HTC_MSG_READY_ID:
325 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
326 /* handle HTC control message */
327 if (completion_done(&htc->ctl_resp)) {
328 /* this is a fatal error, target should not be
329 * sending unsolicited messages on the ep 0
330 */
331 ath11k_warn(ab, "HTC rx ctrl still processing\n");
332 complete(&htc->ctl_resp);
333 goto out;
334 }
335
336 htc->control_resp_len =
337 min_t(int, skb->len,
338 ATH11K_HTC_MAX_CTRL_MSG_LEN);
339
340 memcpy(htc->control_resp_buffer, skb->data,
341 htc->control_resp_len);
342
343 complete(&htc->ctl_resp);
344 break;
345 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE:
346 ath11k_htc_suspend_complete(ab, true);
347 break;
348 case ATH11K_HTC_MSG_NACK_SUSPEND:
349 ath11k_htc_suspend_complete(ab, false);
350 break;
351 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID:
352 break;
353 default:
354 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n",
355 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id));
356 break;
357 }
358 goto out;
359 }
360
361 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
362 eid, skb);
363 ep->ep_ops.ep_rx_complete(ab, skb);
364
365 /* poll tx completion for interrupt disabled CE's */
366 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id);
367
368 /* skb is now owned by the rx completion handler */
369 skb = NULL;
370out:
371 kfree_skb(skb);
372}
373
374static void ath11k_htc_control_rx_complete(struct ath11k_base *ab,
375 struct sk_buff *skb)
376{
377 /* This is unexpected. FW is not supposed to send regular rx on this
378 * endpoint.
379 */
380 ath11k_warn(ab, "unexpected htc rx\n");
381 kfree_skb(skb);
382}
383
384static const char *htc_service_name(enum ath11k_htc_svc_id id)
385{
386 switch (id) {
387 case ATH11K_HTC_SVC_ID_RESERVED:
388 return "Reserved";
389 case ATH11K_HTC_SVC_ID_RSVD_CTRL:
390 return "Control";
391 case ATH11K_HTC_SVC_ID_WMI_CONTROL:
392 return "WMI";
393 case ATH11K_HTC_SVC_ID_WMI_DATA_BE:
394 return "DATA BE";
395 case ATH11K_HTC_SVC_ID_WMI_DATA_BK:
396 return "DATA BK";
397 case ATH11K_HTC_SVC_ID_WMI_DATA_VI:
398 return "DATA VI";
399 case ATH11K_HTC_SVC_ID_WMI_DATA_VO:
400 return "DATA VO";
401 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1:
402 return "WMI MAC1";
403 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2:
404 return "WMI MAC2";
405 case ATH11K_HTC_SVC_ID_NMI_CONTROL:
406 return "NMI Control";
407 case ATH11K_HTC_SVC_ID_NMI_DATA:
408 return "NMI Data";
409 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG:
410 return "HTT Data";
411 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS:
412 return "RAW";
413 case ATH11K_HTC_SVC_ID_IPA_TX:
414 return "IPA TX";
415 case ATH11K_HTC_SVC_ID_PKT_LOG:
416 return "PKT LOG";
417 }
418
419 return "Unknown";
420}
421
422static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc)
423{
424 struct ath11k_htc_ep *ep;
425 int i;
426
427 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) {
428 ep = &htc->endpoint[i];
429 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED;
430 ep->max_ep_message_len = 0;
431 ep->max_tx_queue_depth = 0;
432 ep->eid = i;
433 ep->htc = htc;
434 ep->tx_credit_flow_enabled = true;
435 }
436}
437
438static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc,
439 u16 service_id)
440{
441 u8 i, allocation = 0;
442
443 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) {
444 if (htc->service_alloc_table[i].service_id == service_id) {
445 allocation =
446 htc->service_alloc_table[i].credit_allocation;
447 }
448 }
449
450 return allocation;
451}
452
453static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc)
454{
455 struct ath11k_htc_svc_tx_credits *serv_entry;
456 u32 svc_id[] = {
457 ATH11K_HTC_SVC_ID_WMI_CONTROL,
458 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1,
459 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2,
460 };
461 int i, credits;
462
463 credits = htc->total_transmit_credits;
464 serv_entry = htc->service_alloc_table;
465
466 if ((htc->wmi_ep_count == 0) ||
467 (htc->wmi_ep_count > ARRAY_SIZE(svc_id)))
468 return -EINVAL;
469
470 /* Divide credits among number of endpoints for WMI */
471 credits = credits / htc->wmi_ep_count;
472 for (i = 0; i < htc->wmi_ep_count; i++) {
473 serv_entry[i].service_id = svc_id[i];
474 serv_entry[i].credit_allocation = credits;
475 }
476
477 return 0;
478}
479
480int ath11k_htc_wait_target(struct ath11k_htc *htc)
481{
482 int i, status = 0;
483 struct ath11k_base *ab = htc->ab;
484 unsigned long time_left;
485 struct ath11k_htc_ready *ready;
486 u16 message_id;
487 u16 credit_count;
488 u16 credit_size;
489
490 time_left = wait_for_completion_timeout(&htc->ctl_resp,
491 ATH11K_HTC_WAIT_TIMEOUT_HZ);
492 if (!time_left) {
493 ath11k_warn(ab, "failed to receive control response completion, polling..\n");
494
495 for (i = 0; i < ab->hw_params.ce_count; i++)
496 ath11k_ce_per_engine_service(htc->ab, i);
497
498 time_left =
499 wait_for_completion_timeout(&htc->ctl_resp,
500 ATH11K_HTC_WAIT_TIMEOUT_HZ);
501
502 if (!time_left)
503 status = -ETIMEDOUT;
504 }
505
506 if (status < 0) {
507 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status);
508 return status;
509 }
510
511 if (htc->control_resp_len < sizeof(*ready)) {
512 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n",
513 htc->control_resp_len);
514 return -ECOMM;
515 }
516
517 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer;
518 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count);
519 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT,
520 ready->id_credit_count);
521 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep);
522
523 if (message_id != ATH11K_HTC_MSG_READY_ID) {
524 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id);
525 return -ECOMM;
526 }
527
528 htc->total_transmit_credits = credit_count;
529 htc->target_credit_size = credit_size;
530
531 ath11k_dbg(ab, ATH11K_DBG_HTC,
532 "Target ready! transmit resources: %d size:%d\n",
533 htc->total_transmit_credits, htc->target_credit_size);
534
535 if ((htc->total_transmit_credits == 0) ||
536 (htc->target_credit_size == 0)) {
537 ath11k_warn(ab, "Invalid credit size received\n");
538 return -ECOMM;
539 }
540
541 /* For QCA6390, wmi endpoint uses 1 credit to avoid
542 * back-to-back write.
543 */
544 if (ab->hw_params.supports_shadow_regs)
545 htc->total_transmit_credits = 1;
546
547 ath11k_htc_setup_target_buffer_assignments(htc);
548
549 return 0;
550}
551
552int ath11k_htc_connect_service(struct ath11k_htc *htc,
553 struct ath11k_htc_svc_conn_req *conn_req,
554 struct ath11k_htc_svc_conn_resp *conn_resp)
555{
556 struct ath11k_base *ab = htc->ab;
557 struct ath11k_htc_conn_svc *req_msg;
558 struct ath11k_htc_conn_svc_resp resp_msg_dummy;
559 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy;
560 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT;
561 struct ath11k_htc_ep *ep;
562 struct sk_buff *skb;
563 unsigned int max_msg_size = 0;
564 int length, status;
565 unsigned long time_left;
566 bool disable_credit_flow_ctrl = false;
567 u16 message_id, service_id, flags = 0;
568 u8 tx_alloc = 0;
569
570 /* special case for HTC pseudo control service */
571 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) {
572 disable_credit_flow_ctrl = true;
573 assigned_eid = ATH11K_HTC_EP_0;
574 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN;
575 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
576 goto setup;
577 }
578
579 tx_alloc = ath11k_htc_get_credit_allocation(htc,
580 conn_req->service_id);
581 if (!tx_alloc)
582 ath11k_dbg(ab, ATH11K_DBG_BOOT,
583 "boot htc service %s does not allocate target credits\n",
584 htc_service_name(conn_req->service_id));
585
586 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
587 if (!skb) {
588 ath11k_warn(ab, "Failed to allocate HTC packet\n");
589 return -ENOMEM;
590 }
591
592 length = sizeof(*req_msg);
593 skb_put(skb, length);
594 memset(skb->data, 0, length);
595
596 req_msg = (struct ath11k_htc_conn_svc *)skb->data;
597 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID,
598 ATH11K_HTC_MSG_CONNECT_SERVICE_ID);
599
600 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc);
601
602 /* Only enable credit flow control for WMI ctrl service */
603 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL ||
604 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 ||
605 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) {
606 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
607 disable_credit_flow_ctrl = true;
608 }
609
610 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags);
611 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID,
612 conn_req->service_id);
613
614 reinit_completion(&htc->ctl_resp);
615
616 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
617 if (status) {
618 kfree_skb(skb);
619 return status;
620 }
621
622 /* wait for response */
623 time_left = wait_for_completion_timeout(&htc->ctl_resp,
624 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ);
625 if (!time_left) {
626 ath11k_err(ab, "Service connect timeout\n");
627 return -ETIMEDOUT;
628 }
629
630 /* we controlled the buffer creation, it's aligned */
631 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer;
632 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id);
633 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID,
634 resp_msg->msg_svc_id);
635
636 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
637 (htc->control_resp_len < sizeof(*resp_msg))) {
638 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id);
639 return -EPROTO;
640 }
641
642 ath11k_dbg(ab, ATH11K_DBG_HTC,
643 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n",
644 htc_service_name(service_id),
645 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len),
646 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len));
647
648 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS,
649 resp_msg->flags_len);
650
651 /* check response status */
652 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) {
653 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n",
654 htc_service_name(service_id),
655 conn_resp->connect_resp_code);
656 return -EPROTO;
657 }
658
659 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET(
660 HTC_SVC_RESP_MSG_ENDPOINTID,
661 resp_msg->flags_len);
662
663 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
664 resp_msg->flags_len);
665
666setup:
667
668 if (assigned_eid >= ATH11K_HTC_EP_COUNT)
669 return -EPROTO;
670
671 if (max_msg_size == 0)
672 return -EPROTO;
673
674 ep = &htc->endpoint[assigned_eid];
675 ep->eid = assigned_eid;
676
677 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED)
678 return -EPROTO;
679
680 /* return assigned endpoint to caller */
681 conn_resp->eid = assigned_eid;
682 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
683 resp_msg->flags_len);
684
685 /* setup the endpoint */
686 ep->service_id = conn_req->service_id;
687 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
688 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
689 resp_msg->flags_len);
690 ep->tx_credits = tx_alloc;
691
692 /* copy all the callbacks */
693 ep->ep_ops = conn_req->ep_ops;
694
695 status = ath11k_hif_map_service_to_pipe(htc->ab,
696 ep->service_id,
697 &ep->ul_pipe_id,
698 &ep->dl_pipe_id);
699 if (status)
700 return status;
701
702 ath11k_dbg(ab, ATH11K_DBG_BOOT,
703 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
704 htc_service_name(ep->service_id), ep->ul_pipe_id,
705 ep->dl_pipe_id, ep->eid);
706
707 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
708 ep->tx_credit_flow_enabled = false;
709 ath11k_dbg(ab, ATH11K_DBG_BOOT,
710 "boot htc service '%s' eid %d TX flow control disabled\n",
711 htc_service_name(ep->service_id), assigned_eid);
712 }
713
714 return status;
715}
716
717int ath11k_htc_start(struct ath11k_htc *htc)
718{
719 struct sk_buff *skb;
720 int status = 0;
721 struct ath11k_base *ab = htc->ab;
722 struct ath11k_htc_setup_complete_extended *msg;
723
724 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
725 if (!skb)
726 return -ENOMEM;
727
728 skb_put(skb, sizeof(*msg));
729 memset(skb->data, 0, skb->len);
730
731 msg = (struct ath11k_htc_setup_complete_extended *)skb->data;
732 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID,
733 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID);
734
735 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n");
736
737 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
738 if (status) {
739 kfree_skb(skb);
740 return status;
741 }
742
743 return 0;
744}
745
746int ath11k_htc_init(struct ath11k_base *ab)
747{
748 struct ath11k_htc *htc = &ab->htc;
749 struct ath11k_htc_svc_conn_req conn_req;
750 struct ath11k_htc_svc_conn_resp conn_resp;
751 int ret;
752
753 spin_lock_init(&htc->tx_lock);
754
755 ath11k_htc_reset_endpoint_states(htc);
756
757 htc->ab = ab;
758
759 switch (ab->wmi_ab.preferred_hw_mode) {
760 case WMI_HOST_HW_MODE_SINGLE:
761 htc->wmi_ep_count = 1;
762 break;
763 case WMI_HOST_HW_MODE_DBS:
764 case WMI_HOST_HW_MODE_DBS_OR_SBS:
765 htc->wmi_ep_count = 2;
766 break;
767 case WMI_HOST_HW_MODE_DBS_SBS:
768 htc->wmi_ep_count = 3;
769 break;
770 default:
771 htc->wmi_ep_count = ab->hw_params.max_radios;
772 break;
773 }
774
775 /* setup our pseudo HTC control endpoint connection */
776 memset(&conn_req, 0, sizeof(conn_req));
777 memset(&conn_resp, 0, sizeof(conn_resp));
778 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete;
779 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete;
780 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS;
781 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL;
782
783 /* connect fake service */
784 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp);
785 if (ret) {
786 ath11k_err(ab, "could not connect to htc service (%d)\n", ret);
787 return ret;
788 }
789
790 init_completion(&htc->ctl_resp);
791
792 return 0;
793}