?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
accel/ivpu: Move recovery work to system_unbound_wq
[drm/drm-misc.git] / drivers / net / wireless / ath / ath12k / htc.c
blobd13616bf07f43da4711c6e37628f978d7292f3fe
1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2022, 2024 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6 #include <linux/skbuff.h>
7 #include <linux/ctype.h>
8
9 #include "debug.h"
10 #include "hif.h"
11
12 struct sk_buff *ath12k_htc_alloc_skb(struct ath12k_base *ab, int size)
13 {
14 struct sk_buff *skb;
15
16 skb = dev_alloc_skb(size + sizeof(struct ath12k_htc_hdr));
17 if (!skb)
18 return NULL;
19
20 skb_reserve(skb, sizeof(struct ath12k_htc_hdr));
21
22 /* FW/HTC requires 4-byte aligned streams */
23 if (!IS_ALIGNED((unsigned long)skb->data, 4))
24 ath12k_warn(ab, "Unaligned HTC tx skb\n");
25
26 return skb;
27 }
28
29 static void ath12k_htc_control_tx_complete(struct ath12k_base *ab,
30 struct sk_buff *skb)
31 {
32 kfree_skb(skb);
33 }
34
35 static struct sk_buff *ath12k_htc_build_tx_ctrl_skb(void)
36 {
37 struct sk_buff *skb;
38 struct ath12k_skb_cb *skb_cb;
39
40 skb = dev_alloc_skb(ATH12K_HTC_CONTROL_BUFFER_SIZE);
41 if (!skb)
42 return NULL;
43
44 skb_reserve(skb, sizeof(struct ath12k_htc_hdr));
45 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4));
46
47 skb_cb = ATH12K_SKB_CB(skb);
48 memset(skb_cb, 0, sizeof(*skb_cb));
49
50 return skb;
51 }
52
53 static void ath12k_htc_prepare_tx_skb(struct ath12k_htc_ep *ep,
54 struct sk_buff *skb)
55 {
56 struct ath12k_htc_hdr *hdr;
57
58 hdr = (struct ath12k_htc_hdr *)skb->data;
59
60 memset(hdr, 0, sizeof(*hdr));
61 hdr->htc_info = le32_encode_bits(ep->eid, HTC_HDR_ENDPOINTID) |
62 le32_encode_bits((skb->len - sizeof(*hdr)),
63 HTC_HDR_PAYLOADLEN);
64
65 if (ep->tx_credit_flow_enabled)
66 hdr->htc_info |= le32_encode_bits(ATH12K_HTC_FLAG_NEED_CREDIT_UPDATE,
67 HTC_HDR_FLAGS);
68
69 spin_lock_bh(&ep->htc->tx_lock);
70 hdr->ctrl_info = le32_encode_bits(ep->seq_no++, HTC_HDR_CONTROLBYTES1);
71 spin_unlock_bh(&ep->htc->tx_lock);
72 }
73
74 int ath12k_htc_send(struct ath12k_htc *htc,
75 enum ath12k_htc_ep_id eid,
76 struct sk_buff *skb)
77 {
78 struct ath12k_htc_ep *ep = &htc->endpoint[eid];
79 struct ath12k_skb_cb *skb_cb = ATH12K_SKB_CB(skb);
80 struct device *dev = htc->ab->dev;
81 struct ath12k_base *ab = htc->ab;
82 int credits = 0;
83 int ret;
84
85 if (eid >= ATH12K_HTC_EP_COUNT) {
86 ath12k_warn(ab, "Invalid endpoint id: %d\n", eid);
87 return -ENOENT;
88 }
89
90 skb_push(skb, sizeof(struct ath12k_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 ath12k_dbg(ab, ATH12K_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 ath12k_dbg(ab, ATH12K_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 ath12k_htc_prepare_tx_skb(ep, skb);
111
112 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
113 ret = dma_mapping_error(dev, skb_cb->paddr);
114 if (ret) {
115 ret = -EIO;
116 goto err_credits;
117 }
118
119 ret = ath12k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid);
120 if (ret)
121 goto err_unmap;
122
123 return 0;
124
125 err_unmap:
126 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
127 err_credits:
128 if (ep->tx_credit_flow_enabled) {
129 spin_lock_bh(&htc->tx_lock);
130 ep->tx_credits += credits;
131 ath12k_dbg(ab, ATH12K_DBG_HTC,
132 "htc ep %d reverted %d credits back (total %d)\n",
133 eid, credits, ep->tx_credits);
134 spin_unlock_bh(&htc->tx_lock);
135
136 if (ep->ep_ops.ep_tx_credits)
137 ep->ep_ops.ep_tx_credits(htc->ab);
138 }
139 err_pull:
140 skb_pull(skb, sizeof(struct ath12k_htc_hdr));
141 return ret;
142 }
143
144 static void
145 ath12k_htc_process_credit_report(struct ath12k_htc *htc,
146 const struct ath12k_htc_credit_report *report,
147 int len,
148 enum ath12k_htc_ep_id eid)
149 {
150 struct ath12k_base *ab = htc->ab;
151 struct ath12k_htc_ep *ep;
152 int i, n_reports;
153
154 if (len % sizeof(*report))
155 ath12k_warn(ab, "Uneven credit report len %d", len);
156
157 n_reports = len / sizeof(*report);
158
159 spin_lock_bh(&htc->tx_lock);
160 for (i = 0; i < n_reports; i++, report++) {
161 if (report->eid >= ATH12K_HTC_EP_COUNT)
162 break;
163
164 ep = &htc->endpoint[report->eid];
165 ep->tx_credits += report->credits;
166
167 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
168 report->eid, report->credits, ep->tx_credits);
169
170 if (ep->ep_ops.ep_tx_credits) {
171 spin_unlock_bh(&htc->tx_lock);
172 ep->ep_ops.ep_tx_credits(htc->ab);
173 spin_lock_bh(&htc->tx_lock);
174 }
175 }
176 spin_unlock_bh(&htc->tx_lock);
177 }
178
179 static int ath12k_htc_process_trailer(struct ath12k_htc *htc,
180 u8 *buffer,
181 int length,
182 enum ath12k_htc_ep_id src_eid)
183 {
184 struct ath12k_base *ab = htc->ab;
185 int status = 0;
186 struct ath12k_htc_record *record;
187 size_t len;
188
189 while (length > 0) {
190 record = (struct ath12k_htc_record *)buffer;
191
192 if (length < sizeof(record->hdr)) {
193 status = -EINVAL;
194 break;
195 }
196
197 if (record->hdr.len > length) {
198 /* no room left in buffer for record */
199 ath12k_warn(ab, "Invalid record length: %d\n",
200 record->hdr.len);
201 status = -EINVAL;
202 break;
203 }
204
205 switch (record->hdr.id) {
206 case ATH12K_HTC_RECORD_CREDITS:
207 len = sizeof(struct ath12k_htc_credit_report);
208 if (record->hdr.len < len) {
209 ath12k_warn(ab, "Credit report too long\n");
210 status = -EINVAL;
211 break;
212 }
213 ath12k_htc_process_credit_report(htc,
214 record->credit_report,
215 record->hdr.len,
216 src_eid);
217 break;
218 default:
219 ath12k_warn(ab, "Unhandled record: id:%d length:%d\n",
220 record->hdr.id, record->hdr.len);
221 break;
222 }
223
224 if (status)
225 break;
226
227 /* multiple records may be present in a trailer */
228 buffer += sizeof(record->hdr) + record->hdr.len;
229 length -= sizeof(record->hdr) + record->hdr.len;
230 }
231
232 return status;
233 }
234
235 static void ath12k_htc_suspend_complete(struct ath12k_base *ab, bool ack)
236 {
237 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot suspend complete %d\n", ack);
238
239 if (ack)
240 set_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
241 else
242 clear_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
243
244 complete(&ab->htc_suspend);
245 }
246
247 static void ath12k_htc_wakeup_from_suspend(struct ath12k_base *ab)
248 {
249 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot wakeup from suspend is received\n");
250 }
251
252 void ath12k_htc_rx_completion_handler(struct ath12k_base *ab,
253 struct sk_buff *skb)
254 {
255 int status = 0;
256 struct ath12k_htc *htc = &ab->htc;
257 struct ath12k_htc_hdr *hdr;
258 struct ath12k_htc_ep *ep;
259 u16 payload_len;
260 u32 trailer_len = 0;
261 size_t min_len;
262 u8 eid;
263 bool trailer_present;
264
265 hdr = (struct ath12k_htc_hdr *)skb->data;
266 skb_pull(skb, sizeof(*hdr));
267
268 eid = le32_get_bits(hdr->htc_info, HTC_HDR_ENDPOINTID);
269
270 if (eid >= ATH12K_HTC_EP_COUNT) {
271 ath12k_warn(ab, "HTC Rx: invalid eid %d\n", eid);
272 goto out;
273 }
274
275 ep = &htc->endpoint[eid];
276
277 payload_len = le32_get_bits(hdr->htc_info, HTC_HDR_PAYLOADLEN);
278
279 if (payload_len + sizeof(*hdr) > ATH12K_HTC_MAX_LEN) {
280 ath12k_warn(ab, "HTC rx frame too long, len: %zu\n",
281 payload_len + sizeof(*hdr));
282 goto out;
283 }
284
285 if (skb->len < payload_len) {
286 ath12k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n",
287 skb->len, payload_len);
288 goto out;
289 }
290
291 /* get flags to check for trailer */
292 trailer_present = le32_get_bits(hdr->htc_info, HTC_HDR_FLAGS) &
293 ATH12K_HTC_FLAG_TRAILER_PRESENT;
294
295 if (trailer_present) {
296 u8 *trailer;
297
298 trailer_len = le32_get_bits(hdr->ctrl_info,
299 HTC_HDR_CONTROLBYTES0);
300 min_len = sizeof(struct ath12k_htc_record_hdr);
301
302 if ((trailer_len < min_len) ||
303 (trailer_len > payload_len)) {
304 ath12k_warn(ab, "Invalid trailer length: %d\n",
305 trailer_len);
306 goto out;
307 }
308
309 trailer = (u8 *)hdr;
310 trailer += sizeof(*hdr);
311 trailer += payload_len;
312 trailer -= trailer_len;
313 status = ath12k_htc_process_trailer(htc, trailer,
314 trailer_len, eid);
315 if (status)
316 goto out;
317
318 skb_trim(skb, skb->len - trailer_len);
319 }
320
321 if (trailer_len >= payload_len)
322 /* zero length packet with trailer data, just drop these */
323 goto out;
324
325 if (eid == ATH12K_HTC_EP_0) {
326 struct ath12k_htc_msg *msg = (struct ath12k_htc_msg *)skb->data;
327
328 switch (le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)) {
329 case ATH12K_HTC_MSG_READY_ID:
330 case ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
331 /* handle HTC control message */
332 if (completion_done(&htc->ctl_resp)) {
333 /* this is a fatal error, target should not be
334 * sending unsolicited messages on the ep 0
335 */
336 ath12k_warn(ab, "HTC rx ctrl still processing\n");
337 complete(&htc->ctl_resp);
338 goto out;
339 }
340
341 htc->control_resp_len =
342 min_t(int, skb->len,
343 ATH12K_HTC_MAX_CTRL_MSG_LEN);
344
345 memcpy(htc->control_resp_buffer, skb->data,
346 htc->control_resp_len);
347
348 complete(&htc->ctl_resp);
349 break;
350 case ATH12K_HTC_MSG_SEND_SUSPEND_COMPLETE:
351 ath12k_htc_suspend_complete(ab, true);
352 break;
353 case ATH12K_HTC_MSG_NACK_SUSPEND:
354 ath12k_htc_suspend_complete(ab, false);
355 break;
356 case ATH12K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID:
357 ath12k_htc_wakeup_from_suspend(ab);
358 break;
359 default:
360 ath12k_warn(ab, "ignoring unsolicited htc ep0 event %u\n",
361 le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID));
362 break;
363 }
364 goto out;
365 }
366
367 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc rx completion ep %d skb %p\n",
368 eid, skb);
369 ep->ep_ops.ep_rx_complete(ab, skb);
370
371 /* poll tx completion for interrupt disabled CE's */
372 ath12k_ce_poll_send_completed(ab, ep->ul_pipe_id);
373
374 /* skb is now owned by the rx completion handler */
375 skb = NULL;
376 out:
377 kfree_skb(skb);
378 }
379
380 static void ath12k_htc_control_rx_complete(struct ath12k_base *ab,
381 struct sk_buff *skb)
382 {
383 /* This is unexpected. FW is not supposed to send regular rx on this
384 * endpoint.
385 */
386 ath12k_warn(ab, "unexpected htc rx\n");
387 kfree_skb(skb);
388 }
389
390 static const char *htc_service_name(enum ath12k_htc_svc_id id)
391 {
392 switch (id) {
393 case ATH12K_HTC_SVC_ID_RESERVED:
394 return "Reserved";
395 case ATH12K_HTC_SVC_ID_RSVD_CTRL:
396 return "Control";
397 case ATH12K_HTC_SVC_ID_WMI_CONTROL:
398 return "WMI";
399 case ATH12K_HTC_SVC_ID_WMI_DATA_BE:
400 return "DATA BE";
401 case ATH12K_HTC_SVC_ID_WMI_DATA_BK:
402 return "DATA BK";
403 case ATH12K_HTC_SVC_ID_WMI_DATA_VI:
404 return "DATA VI";
405 case ATH12K_HTC_SVC_ID_WMI_DATA_VO:
406 return "DATA VO";
407 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1:
408 return "WMI MAC1";
409 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2:
410 return "WMI MAC2";
411 case ATH12K_HTC_SVC_ID_NMI_CONTROL:
412 return "NMI Control";
413 case ATH12K_HTC_SVC_ID_NMI_DATA:
414 return "NMI Data";
415 case ATH12K_HTC_SVC_ID_HTT_DATA_MSG:
416 return "HTT Data";
417 case ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS:
418 return "RAW";
419 case ATH12K_HTC_SVC_ID_IPA_TX:
420 return "IPA TX";
421 case ATH12K_HTC_SVC_ID_PKT_LOG:
422 return "PKT LOG";
423 case ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG:
424 return "WMI DIAG";
425 }
426
427 return "Unknown";
428 }
429
430 static void ath12k_htc_reset_endpoint_states(struct ath12k_htc *htc)
431 {
432 struct ath12k_htc_ep *ep;
433 int i;
434
435 for (i = ATH12K_HTC_EP_0; i < ATH12K_HTC_EP_COUNT; i++) {
436 ep = &htc->endpoint[i];
437 ep->service_id = ATH12K_HTC_SVC_ID_UNUSED;
438 ep->max_ep_message_len = 0;
439 ep->max_tx_queue_depth = 0;
440 ep->eid = i;
441 ep->htc = htc;
442 ep->tx_credit_flow_enabled = true;
443 }
444 }
445
446 static u8 ath12k_htc_get_credit_allocation(struct ath12k_htc *htc,
447 u16 service_id)
448 {
449 struct ath12k_htc_svc_tx_credits *serv_entry;
450 u8 i, allocation = 0;
451
452 serv_entry = htc->service_alloc_table;
453
454 for (i = 0; i < ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) {
455 if (serv_entry[i].service_id == service_id) {
456 allocation = serv_entry[i].credit_allocation;
457 break;
458 }
459 }
460
461 return allocation;
462 }
463
464 static int ath12k_htc_setup_target_buffer_assignments(struct ath12k_htc *htc)
465 {
466 struct ath12k_htc_svc_tx_credits *serv_entry;
467 static const u32 svc_id[] = {
468 ATH12K_HTC_SVC_ID_WMI_CONTROL,
469 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1,
470 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2,
471 };
472 int i, credits;
473
474 credits = htc->total_transmit_credits;
475 serv_entry = htc->service_alloc_table;
476
477 if ((htc->wmi_ep_count == 0) ||
478 (htc->wmi_ep_count > ARRAY_SIZE(svc_id)))
479 return -EINVAL;
480
481 /* Divide credits among number of endpoints for WMI */
482 credits = credits / htc->wmi_ep_count;
483 for (i = 0; i < htc->wmi_ep_count; i++) {
484 serv_entry[i].service_id = svc_id[i];
485 serv_entry[i].credit_allocation = credits;
486 }
487
488 return 0;
489 }
490
491 int ath12k_htc_wait_target(struct ath12k_htc *htc)
492 {
493 int i, status = 0;
494 struct ath12k_base *ab = htc->ab;
495 unsigned long time_left;
496 struct ath12k_htc_ready *ready;
497 u16 message_id;
498 u16 credit_count;
499 u16 credit_size;
500
501 time_left = wait_for_completion_timeout(&htc->ctl_resp,
502 ATH12K_HTC_WAIT_TIMEOUT_HZ);
503 if (!time_left) {
504 ath12k_warn(ab, "failed to receive control response completion, polling..\n");
505
506 for (i = 0; i < ab->hw_params->ce_count; i++)
507 ath12k_ce_per_engine_service(htc->ab, i);
508
509 time_left =
510 wait_for_completion_timeout(&htc->ctl_resp,
511 ATH12K_HTC_WAIT_TIMEOUT_HZ);
512
513 if (!time_left)
514 status = -ETIMEDOUT;
515 }
516
517 if (status < 0) {
518 ath12k_warn(ab, "ctl_resp never came in (%d)\n", status);
519 return status;
520 }
521
522 if (htc->control_resp_len < sizeof(*ready)) {
523 ath12k_warn(ab, "Invalid HTC ready msg len:%d\n",
524 htc->control_resp_len);
525 return -ECOMM;
526 }
527
528 ready = (struct ath12k_htc_ready *)htc->control_resp_buffer;
529 message_id = le32_get_bits(ready->id_credit_count, HTC_MSG_MESSAGEID);
530 credit_count = le32_get_bits(ready->id_credit_count,
531 HTC_READY_MSG_CREDITCOUNT);
532 credit_size = le32_get_bits(ready->size_ep, HTC_READY_MSG_CREDITSIZE);
533
534 if (message_id != ATH12K_HTC_MSG_READY_ID) {
535 ath12k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id);
536 return -ECOMM;
537 }
538
539 htc->total_transmit_credits = credit_count;
540 htc->target_credit_size = credit_size;
541
542 ath12k_dbg(ab, ATH12K_DBG_HTC,
543 "Target ready! transmit resources: %d size:%d\n",
544 htc->total_transmit_credits, htc->target_credit_size);
545
546 if ((htc->total_transmit_credits == 0) ||
547 (htc->target_credit_size == 0)) {
548 ath12k_warn(ab, "Invalid credit size received\n");
549 return -ECOMM;
550 }
551
552 ath12k_htc_setup_target_buffer_assignments(htc);
553
554 return 0;
555 }
556
557 int ath12k_htc_connect_service(struct ath12k_htc *htc,
558 struct ath12k_htc_svc_conn_req *conn_req,
559 struct ath12k_htc_svc_conn_resp *conn_resp)
560 {
561 struct ath12k_base *ab = htc->ab;
562 struct ath12k_htc_conn_svc *req_msg;
563 struct ath12k_htc_conn_svc_resp resp_msg_dummy;
564 struct ath12k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy;
565 enum ath12k_htc_ep_id assigned_eid = ATH12K_HTC_EP_COUNT;
566 struct ath12k_htc_ep *ep;
567 struct sk_buff *skb;
568 unsigned int max_msg_size = 0;
569 int length, status;
570 unsigned long time_left;
571 bool disable_credit_flow_ctrl = false;
572 u16 message_id, service_id, flags = 0;
573 u8 tx_alloc = 0;
574
575 /* special case for HTC pseudo control service */
576 if (conn_req->service_id == ATH12K_HTC_SVC_ID_RSVD_CTRL) {
577 disable_credit_flow_ctrl = true;
578 assigned_eid = ATH12K_HTC_EP_0;
579 max_msg_size = ATH12K_HTC_MAX_CTRL_MSG_LEN;
580 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
581 goto setup;
582 }
583
584 tx_alloc = ath12k_htc_get_credit_allocation(htc,
585 conn_req->service_id);
586 if (!tx_alloc)
587 ath12k_dbg(ab, ATH12K_DBG_BOOT,
588 "boot htc service %s does not allocate target credits\n",
589 htc_service_name(conn_req->service_id));
590
591 skb = ath12k_htc_build_tx_ctrl_skb();
592 if (!skb) {
593 ath12k_warn(ab, "Failed to allocate HTC packet\n");
594 return -ENOMEM;
595 }
596
597 length = sizeof(*req_msg);
598 skb_put(skb, length);
599 memset(skb->data, 0, length);
600
601 req_msg = (struct ath12k_htc_conn_svc *)skb->data;
602 req_msg->msg_svc_id = le32_encode_bits(ATH12K_HTC_MSG_CONNECT_SERVICE_ID,
603 HTC_MSG_MESSAGEID);
604
605 flags |= u32_encode_bits(tx_alloc, ATH12K_HTC_CONN_FLAGS_RECV_ALLOC);
606
607 /* Only enable credit flow control for WMI ctrl service */
608 if (!(conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL ||
609 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 ||
610 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2)) {
611 flags |= ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
612 disable_credit_flow_ctrl = true;
613 }
614
615 req_msg->flags_len = le32_encode_bits(flags, HTC_SVC_MSG_CONNECTIONFLAGS);
616 req_msg->msg_svc_id |= le32_encode_bits(conn_req->service_id,
617 HTC_SVC_MSG_SERVICE_ID);
618
619 reinit_completion(&htc->ctl_resp);
620
621 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb);
622 if (status) {
623 kfree_skb(skb);
624 return status;
625 }
626
627 /* wait for response */
628 time_left = wait_for_completion_timeout(&htc->ctl_resp,
629 ATH12K_HTC_CONN_SVC_TIMEOUT_HZ);
630 if (!time_left) {
631 ath12k_err(ab, "Service connect timeout\n");
632 return -ETIMEDOUT;
633 }
634
635 /* we controlled the buffer creation, it's aligned */
636 resp_msg = (struct ath12k_htc_conn_svc_resp *)htc->control_resp_buffer;
637 message_id = le32_get_bits(resp_msg->msg_svc_id, HTC_MSG_MESSAGEID);
638 service_id = le32_get_bits(resp_msg->msg_svc_id,
639 HTC_SVC_RESP_MSG_SERVICEID);
640
641 if ((message_id != ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
642 (htc->control_resp_len < sizeof(*resp_msg))) {
643 ath12k_err(ab, "Invalid resp message ID 0x%x", message_id);
644 return -EPROTO;
645 }
646
647 ath12k_dbg(ab, ATH12K_DBG_HTC,
648 "HTC Service %s connect response: status: %u, assigned ep: %u\n",
649 htc_service_name(service_id),
650 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_STATUS),
651 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_ENDPOINTID));
652
653 conn_resp->connect_resp_code = le32_get_bits(resp_msg->flags_len,
654 HTC_SVC_RESP_MSG_STATUS);
655
656 /* check response status */
657 if (conn_resp->connect_resp_code != ATH12K_HTC_CONN_SVC_STATUS_SUCCESS) {
658 ath12k_err(ab, "HTC Service %s connect request failed: 0x%x)\n",
659 htc_service_name(service_id),
660 conn_resp->connect_resp_code);
661 return -EPROTO;
662 }
663
664 assigned_eid = le32_get_bits(resp_msg->flags_len,
665 HTC_SVC_RESP_MSG_ENDPOINTID);
666
667 max_msg_size = le32_get_bits(resp_msg->flags_len,
668 HTC_SVC_RESP_MSG_MAXMSGSIZE);
669
670 setup:
671
672 if (assigned_eid >= ATH12K_HTC_EP_COUNT)
673 return -EPROTO;
674
675 if (max_msg_size == 0)
676 return -EPROTO;
677
678 ep = &htc->endpoint[assigned_eid];
679 ep->eid = assigned_eid;
680
681 if (ep->service_id != ATH12K_HTC_SVC_ID_UNUSED)
682 return -EPROTO;
683
684 /* return assigned endpoint to caller */
685 conn_resp->eid = assigned_eid;
686 conn_resp->max_msg_len = le32_get_bits(resp_msg->flags_len,
687 HTC_SVC_RESP_MSG_MAXMSGSIZE);
688
689 /* setup the endpoint */
690 ep->service_id = conn_req->service_id;
691 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
692 ep->max_ep_message_len = le32_get_bits(resp_msg->flags_len,
693 HTC_SVC_RESP_MSG_MAXMSGSIZE);
694 ep->tx_credits = tx_alloc;
695
696 /* copy all the callbacks */
697 ep->ep_ops = conn_req->ep_ops;
698
699 status = ath12k_hif_map_service_to_pipe(htc->ab,
700 ep->service_id,
701 &ep->ul_pipe_id,
702 &ep->dl_pipe_id);
703 if (status)
704 return status;
705
706 ath12k_dbg(ab, ATH12K_DBG_BOOT,
707 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
708 htc_service_name(ep->service_id), ep->ul_pipe_id,
709 ep->dl_pipe_id, ep->eid);
710
711 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
712 ep->tx_credit_flow_enabled = false;
713 ath12k_dbg(ab, ATH12K_DBG_BOOT,
714 "boot htc service '%s' eid %d TX flow control disabled\n",
715 htc_service_name(ep->service_id), assigned_eid);
716 }
717
718 return status;
719 }
720
721 int ath12k_htc_start(struct ath12k_htc *htc)
722 {
723 struct sk_buff *skb;
724 int status;
725 struct ath12k_base *ab = htc->ab;
726 struct ath12k_htc_setup_complete_extended *msg;
727
728 skb = ath12k_htc_build_tx_ctrl_skb();
729 if (!skb)
730 return -ENOMEM;
731
732 skb_put(skb, sizeof(*msg));
733 memset(skb->data, 0, skb->len);
734
735 msg = (struct ath12k_htc_setup_complete_extended *)skb->data;
736 msg->msg_id = le32_encode_bits(ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID,
737 HTC_MSG_MESSAGEID);
738
739 ath12k_dbg(ab, ATH12K_DBG_HTC, "HTC is using TX credit flow control\n");
740
741 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb);
742 if (status) {
743 kfree_skb(skb);
744 return status;
745 }
746
747 return 0;
748 }
749
750 int ath12k_htc_init(struct ath12k_base *ab)
751 {
752 struct ath12k_htc *htc = &ab->htc;
753 struct ath12k_htc_svc_conn_req conn_req = { };
754 struct ath12k_htc_svc_conn_resp conn_resp = { };
755 int ret;
756
757 spin_lock_init(&htc->tx_lock);
758
759 ath12k_htc_reset_endpoint_states(htc);
760
761 htc->ab = ab;
762
763 switch (ab->wmi_ab.preferred_hw_mode) {
764 case WMI_HOST_HW_MODE_SINGLE:
765 htc->wmi_ep_count = 1;
766 break;
767 case WMI_HOST_HW_MODE_DBS:
768 case WMI_HOST_HW_MODE_DBS_OR_SBS:
769 htc->wmi_ep_count = 2;
770 break;
771 case WMI_HOST_HW_MODE_DBS_SBS:
772 htc->wmi_ep_count = 3;
773 break;
774 default:
775 htc->wmi_ep_count = ab->hw_params->max_radios;
776 break;
777 }
778
779 /* setup our pseudo HTC control endpoint connection */
780 conn_req.ep_ops.ep_tx_complete = ath12k_htc_control_tx_complete;
781 conn_req.ep_ops.ep_rx_complete = ath12k_htc_control_rx_complete;
782 conn_req.max_send_queue_depth = ATH12K_NUM_CONTROL_TX_BUFFERS;
783 conn_req.service_id = ATH12K_HTC_SVC_ID_RSVD_CTRL;
784
785 /* connect fake service */
786 ret = ath12k_htc_connect_service(htc, &conn_req, &conn_resp);
787 if (ret) {
788 ath12k_err(ab, "could not connect to htc service (%d)\n", ret);
789 return ret;
790 }
791
792 init_completion(&htc->ctl_resp);
793
794 return 0;
795 }
Kernel DRM miscellaneous fixes and cross-tree changes