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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath11k / htc.c
blob8f54f58b83e6fef040636c9838929a58d4c8a59d
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 "ahb.h"
9 #include "debug.h"
10
11 struct 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
28 static void ath11k_htc_control_tx_complete(struct ath11k_base *ab,
29 struct sk_buff *skb)
30 {
31 kfree_skb(skb);
32 }
33
34 static 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
53 static inline void ath11k_htc_restore_tx_skb(struct ath11k_htc *htc,
54 struct sk_buff *skb)
55 {
56 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb);
57
58 dma_unmap_single(htc->ab->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
59 skb_pull(skb, sizeof(struct ath11k_htc_hdr));
60 }
61
62 static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep,
63 struct sk_buff *skb)
64 {
65 struct ath11k_htc_hdr *hdr;
66
67 hdr = (struct ath11k_htc_hdr *)skb->data;
68
69 memset(hdr, 0, sizeof(*hdr));
70 hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) |
71 FIELD_PREP(HTC_HDR_PAYLOADLEN,
72 (skb->len - sizeof(*hdr))) |
73 FIELD_PREP(HTC_HDR_FLAGS,
74 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE);
75
76 spin_lock_bh(&ep->htc->tx_lock);
77 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++);
78 spin_unlock_bh(&ep->htc->tx_lock);
79 }
80
81 int ath11k_htc_send(struct ath11k_htc *htc,
82 enum ath11k_htc_ep_id eid,
83 struct sk_buff *skb)
84 {
85 struct ath11k_htc_ep *ep = &htc->endpoint[eid];
86 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb);
87 struct device *dev = htc->ab->dev;
88 struct ath11k_base *ab = htc->ab;
89 int credits = 0;
90 int ret;
91
92 if (eid >= ATH11K_HTC_EP_COUNT) {
93 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid);
94 return -ENOENT;
95 }
96
97 skb_push(skb, sizeof(struct ath11k_htc_hdr));
98
99 if (ep->tx_credit_flow_enabled) {
100 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
101 spin_lock_bh(&htc->tx_lock);
102 if (ep->tx_credits < credits) {
103 ath11k_dbg(ab, ATH11K_DBG_HTC,
104 "htc insufficient credits ep %d required %d available %d\n",
105 eid, credits, ep->tx_credits);
106 spin_unlock_bh(&htc->tx_lock);
107 ret = -EAGAIN;
108 goto err_pull;
109 }
110 ep->tx_credits -= credits;
111 ath11k_dbg(ab, ATH11K_DBG_HTC,
112 "htc ep %d consumed %d credits (total %d)\n",
113 eid, credits, ep->tx_credits);
114 spin_unlock_bh(&htc->tx_lock);
115 }
116
117 ath11k_htc_prepare_tx_skb(ep, skb);
118
119 skb_cb->eid = eid;
120 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
121 ret = dma_mapping_error(dev, skb_cb->paddr);
122 if (ret) {
123 ret = -EIO;
124 goto err_credits;
125 }
126
127 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid);
128 if (ret)
129 goto err_unmap;
130
131 return 0;
132
133 err_unmap:
134 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
135 err_credits:
136 if (ep->tx_credit_flow_enabled) {
137 spin_lock_bh(&htc->tx_lock);
138 ep->tx_credits += credits;
139 ath11k_dbg(ab, ATH11K_DBG_HTC,
140 "htc ep %d reverted %d credits back (total %d)\n",
141 eid, credits, ep->tx_credits);
142 spin_unlock_bh(&htc->tx_lock);
143
144 if (ep->ep_ops.ep_tx_credits)
145 ep->ep_ops.ep_tx_credits(htc->ab);
146 }
147 err_pull:
148 skb_pull(skb, sizeof(struct ath11k_htc_hdr));
149 return ret;
150 }
151
152 static void
153 ath11k_htc_process_credit_report(struct ath11k_htc *htc,
154 const struct ath11k_htc_credit_report *report,
155 int len,
156 enum ath11k_htc_ep_id eid)
157 {
158 struct ath11k_base *ab = htc->ab;
159 struct ath11k_htc_ep *ep;
160 int i, n_reports;
161
162 if (len % sizeof(*report))
163 ath11k_warn(ab, "Uneven credit report len %d", len);
164
165 n_reports = len / sizeof(*report);
166
167 spin_lock_bh(&htc->tx_lock);
168 for (i = 0; i < n_reports; i++, report++) {
169 if (report->eid >= ATH11K_HTC_EP_COUNT)
170 break;
171
172 ep = &htc->endpoint[report->eid];
173 ep->tx_credits += report->credits;
174
175 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
176 report->eid, report->credits, ep->tx_credits);
177
178 if (ep->ep_ops.ep_tx_credits) {
179 spin_unlock_bh(&htc->tx_lock);
180 ep->ep_ops.ep_tx_credits(htc->ab);
181 spin_lock_bh(&htc->tx_lock);
182 }
183 }
184 spin_unlock_bh(&htc->tx_lock);
185 }
186
187 static int ath11k_htc_process_trailer(struct ath11k_htc *htc,
188 u8 *buffer,
189 int length,
190 enum ath11k_htc_ep_id src_eid)
191 {
192 struct ath11k_base *ab = htc->ab;
193 int status = 0;
194 struct ath11k_htc_record *record;
195 size_t len;
196
197 while (length > 0) {
198 record = (struct ath11k_htc_record *)buffer;
199
200 if (length < sizeof(record->hdr)) {
201 status = -EINVAL;
202 break;
203 }
204
205 if (record->hdr.len > length) {
206 /* no room left in buffer for record */
207 ath11k_warn(ab, "Invalid record length: %d\n",
208 record->hdr.len);
209 status = -EINVAL;
210 break;
211 }
212
213 switch (record->hdr.id) {
214 case ATH11K_HTC_RECORD_CREDITS:
215 len = sizeof(struct ath11k_htc_credit_report);
216 if (record->hdr.len < len) {
217 ath11k_warn(ab, "Credit report too long\n");
218 status = -EINVAL;
219 break;
220 }
221 ath11k_htc_process_credit_report(htc,
222 record->credit_report,
223 record->hdr.len,
224 src_eid);
225 break;
226 default:
227 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n",
228 record->hdr.id, record->hdr.len);
229 break;
230 }
231
232 if (status)
233 break;
234
235 /* multiple records may be present in a trailer */
236 buffer += sizeof(record->hdr) + record->hdr.len;
237 length -= sizeof(record->hdr) + record->hdr.len;
238 }
239
240 return status;
241 }
242
243 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab,
244 struct sk_buff *skb)
245 {
246 int status = 0;
247 struct ath11k_htc *htc = &ab->htc;
248 struct ath11k_htc_hdr *hdr;
249 struct ath11k_htc_ep *ep;
250 u16 payload_len;
251 u32 trailer_len = 0;
252 size_t min_len;
253 u8 eid;
254 bool trailer_present;
255
256 hdr = (struct ath11k_htc_hdr *)skb->data;
257 skb_pull(skb, sizeof(*hdr));
258
259 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info);
260
261 if (eid >= ATH11K_HTC_EP_COUNT) {
262 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid);
263 goto out;
264 }
265
266 ep = &htc->endpoint[eid];
267
268 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info);
269
270 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) {
271 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n",
272 payload_len + sizeof(*hdr));
273 goto out;
274 }
275
276 if (skb->len < payload_len) {
277 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n",
278 skb->len, payload_len);
279 goto out;
280 }
281
282 /* get flags to check for trailer */
283 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) &
284 ATH11K_HTC_FLAG_TRAILER_PRESENT;
285
286 if (trailer_present) {
287 u8 *trailer;
288
289 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info);
290 min_len = sizeof(struct ath11k_htc_record_hdr);
291
292 if ((trailer_len < min_len) ||
293 (trailer_len > payload_len)) {
294 ath11k_warn(ab, "Invalid trailer length: %d\n",
295 trailer_len);
296 goto out;
297 }
298
299 trailer = (u8 *)hdr;
300 trailer += sizeof(*hdr);
301 trailer += payload_len;
302 trailer -= trailer_len;
303 status = ath11k_htc_process_trailer(htc, trailer,
304 trailer_len, eid);
305 if (status)
306 goto out;
307
308 skb_trim(skb, skb->len - trailer_len);
309 }
310
311 if (trailer_len >= payload_len)
312 /* zero length packet with trailer data, just drop these */
313 goto out;
314
315 if (eid == ATH11K_HTC_EP_0) {
316 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data;
317
318 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) {
319 case ATH11K_HTC_MSG_READY_ID:
320 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
321 /* handle HTC control message */
322 if (completion_done(&htc->ctl_resp)) {
323 /* this is a fatal error, target should not be
324 * sending unsolicited messages on the ep 0
325 */
326 ath11k_warn(ab, "HTC rx ctrl still processing\n");
327 complete(&htc->ctl_resp);
328 goto out;
329 }
330
331 htc->control_resp_len =
332 min_t(int, skb->len,
333 ATH11K_HTC_MAX_CTRL_MSG_LEN);
334
335 memcpy(htc->control_resp_buffer, skb->data,
336 htc->control_resp_len);
337
338 complete(&htc->ctl_resp);
339 break;
340 default:
341 ath11k_warn(ab, "ignoring unsolicited htc ep0 event\n");
342 break;
343 }
344 goto out;
345 }
346
347 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
348 eid, skb);
349 ep->ep_ops.ep_rx_complete(ab, skb);
350
351 /* poll tx completion for interrupt disabled CE's */
352 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id);
353
354 /* skb is now owned by the rx completion handler */
355 skb = NULL;
356 out:
357 kfree_skb(skb);
358 }
359
360 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab,
361 struct sk_buff *skb)
362 {
363 /* This is unexpected. FW is not supposed to send regular rx on this
364 * endpoint.
365 */
366 ath11k_warn(ab, "unexpected htc rx\n");
367 kfree_skb(skb);
368 }
369
370 static const char *htc_service_name(enum ath11k_htc_svc_id id)
371 {
372 switch (id) {
373 case ATH11K_HTC_SVC_ID_RESERVED:
374 return "Reserved";
375 case ATH11K_HTC_SVC_ID_RSVD_CTRL:
376 return "Control";
377 case ATH11K_HTC_SVC_ID_WMI_CONTROL:
378 return "WMI";
379 case ATH11K_HTC_SVC_ID_WMI_DATA_BE:
380 return "DATA BE";
381 case ATH11K_HTC_SVC_ID_WMI_DATA_BK:
382 return "DATA BK";
383 case ATH11K_HTC_SVC_ID_WMI_DATA_VI:
384 return "DATA VI";
385 case ATH11K_HTC_SVC_ID_WMI_DATA_VO:
386 return "DATA VO";
387 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1:
388 return "WMI MAC1";
389 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2:
390 return "WMI MAC2";
391 case ATH11K_HTC_SVC_ID_NMI_CONTROL:
392 return "NMI Control";
393 case ATH11K_HTC_SVC_ID_NMI_DATA:
394 return "NMI Data";
395 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG:
396 return "HTT Data";
397 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS:
398 return "RAW";
399 case ATH11K_HTC_SVC_ID_IPA_TX:
400 return "IPA TX";
401 case ATH11K_HTC_SVC_ID_PKT_LOG:
402 return "PKT LOG";
403 }
404
405 return "Unknown";
406 }
407
408 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc)
409 {
410 struct ath11k_htc_ep *ep;
411 int i;
412
413 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) {
414 ep = &htc->endpoint[i];
415 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED;
416 ep->max_ep_message_len = 0;
417 ep->max_tx_queue_depth = 0;
418 ep->eid = i;
419 ep->htc = htc;
420 ep->tx_credit_flow_enabled = true;
421 }
422 }
423
424 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc,
425 u16 service_id)
426 {
427 u8 i, allocation = 0;
428
429 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) {
430 if (htc->service_alloc_table[i].service_id == service_id) {
431 allocation =
432 htc->service_alloc_table[i].credit_allocation;
433 }
434 }
435
436 return allocation;
437 }
438
439 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc)
440 {
441 struct ath11k_htc_svc_tx_credits *serv_entry;
442 u32 svc_id[] = {
443 ATH11K_HTC_SVC_ID_WMI_CONTROL,
444 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1,
445 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2,
446 };
447 int i, credits;
448
449 credits = htc->total_transmit_credits;
450 serv_entry = htc->service_alloc_table;
451
452 if ((htc->wmi_ep_count == 0) ||
453 (htc->wmi_ep_count > ARRAY_SIZE(svc_id)))
454 return -EINVAL;
455
456 /* Divide credits among number of endpoints for WMI */
457 credits = credits / htc->wmi_ep_count;
458 for (i = 0; i < htc->wmi_ep_count; i++) {
459 serv_entry[i].service_id = svc_id[i];
460 serv_entry[i].credit_allocation = credits;
461 }
462
463 return 0;
464 }
465
466 int ath11k_htc_wait_target(struct ath11k_htc *htc)
467 {
468 int i, status = 0;
469 struct ath11k_base *ab = htc->ab;
470 unsigned long time_left;
471 struct ath11k_htc_ready *ready;
472 u16 message_id;
473 u16 credit_count;
474 u16 credit_size;
475
476 time_left = wait_for_completion_timeout(&htc->ctl_resp,
477 ATH11K_HTC_WAIT_TIMEOUT_HZ);
478 if (!time_left) {
479 ath11k_warn(ab, "failed to receive control response completion, polling..\n");
480
481 for (i = 0; i < CE_COUNT; i++)
482 ath11k_ce_per_engine_service(htc->ab, i);
483
484 time_left =
485 wait_for_completion_timeout(&htc->ctl_resp,
486 ATH11K_HTC_WAIT_TIMEOUT_HZ);
487
488 if (!time_left)
489 status = -ETIMEDOUT;
490 }
491
492 if (status < 0) {
493 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status);
494 return status;
495 }
496
497 if (htc->control_resp_len < sizeof(*ready)) {
498 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n",
499 htc->control_resp_len);
500 return -ECOMM;
501 }
502
503 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer;
504 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count);
505 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT,
506 ready->id_credit_count);
507 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep);
508
509 if (message_id != ATH11K_HTC_MSG_READY_ID) {
510 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id);
511 return -ECOMM;
512 }
513
514 htc->total_transmit_credits = credit_count;
515 htc->target_credit_size = credit_size;
516
517 ath11k_dbg(ab, ATH11K_DBG_HTC,
518 "Target ready! transmit resources: %d size:%d\n",
519 htc->total_transmit_credits, htc->target_credit_size);
520
521 if ((htc->total_transmit_credits == 0) ||
522 (htc->target_credit_size == 0)) {
523 ath11k_warn(ab, "Invalid credit size received\n");
524 return -ECOMM;
525 }
526
527 ath11k_htc_setup_target_buffer_assignments(htc);
528
529 return 0;
530 }
531
532 int ath11k_htc_connect_service(struct ath11k_htc *htc,
533 struct ath11k_htc_svc_conn_req *conn_req,
534 struct ath11k_htc_svc_conn_resp *conn_resp)
535 {
536 struct ath11k_base *ab = htc->ab;
537 struct ath11k_htc_conn_svc *req_msg;
538 struct ath11k_htc_conn_svc_resp resp_msg_dummy;
539 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy;
540 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT;
541 struct ath11k_htc_ep *ep;
542 struct sk_buff *skb;
543 unsigned int max_msg_size = 0;
544 int length, status;
545 unsigned long time_left;
546 bool disable_credit_flow_ctrl = false;
547 u16 message_id, service_id, flags = 0;
548 u8 tx_alloc = 0;
549
550 /* special case for HTC pseudo control service */
551 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) {
552 disable_credit_flow_ctrl = true;
553 assigned_eid = ATH11K_HTC_EP_0;
554 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN;
555 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
556 goto setup;
557 }
558
559 tx_alloc = ath11k_htc_get_credit_allocation(htc,
560 conn_req->service_id);
561 if (!tx_alloc)
562 ath11k_dbg(ab, ATH11K_DBG_BOOT,
563 "boot htc service %s does not allocate target credits\n",
564 htc_service_name(conn_req->service_id));
565
566 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
567 if (!skb) {
568 ath11k_warn(ab, "Failed to allocate HTC packet\n");
569 return -ENOMEM;
570 }
571
572 length = sizeof(*req_msg);
573 skb_put(skb, length);
574 memset(skb->data, 0, length);
575
576 req_msg = (struct ath11k_htc_conn_svc *)skb->data;
577 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID,
578 ATH11K_HTC_MSG_CONNECT_SERVICE_ID);
579
580 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc);
581
582 /* Only enable credit flow control for WMI ctrl service */
583 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL ||
584 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 ||
585 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) {
586 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
587 disable_credit_flow_ctrl = true;
588 }
589
590 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags);
591 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID,
592 conn_req->service_id);
593
594 reinit_completion(&htc->ctl_resp);
595
596 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
597 if (status) {
598 kfree_skb(skb);
599 return status;
600 }
601
602 /* wait for response */
603 time_left = wait_for_completion_timeout(&htc->ctl_resp,
604 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ);
605 if (!time_left) {
606 ath11k_err(ab, "Service connect timeout\n");
607 return -ETIMEDOUT;
608 }
609
610 /* we controlled the buffer creation, it's aligned */
611 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer;
612 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id);
613 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID,
614 resp_msg->msg_svc_id);
615
616 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
617 (htc->control_resp_len < sizeof(*resp_msg))) {
618 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id);
619 return -EPROTO;
620 }
621
622 ath11k_dbg(ab, ATH11K_DBG_HTC,
623 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n",
624 htc_service_name(service_id),
625 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len),
626 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len));
627
628 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS,
629 resp_msg->flags_len);
630
631 /* check response status */
632 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) {
633 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n",
634 htc_service_name(service_id),
635 conn_resp->connect_resp_code);
636 return -EPROTO;
637 }
638
639 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET(
640 HTC_SVC_RESP_MSG_ENDPOINTID,
641 resp_msg->flags_len);
642
643 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
644 resp_msg->flags_len);
645
646 setup:
647
648 if (assigned_eid >= ATH11K_HTC_EP_COUNT)
649 return -EPROTO;
650
651 if (max_msg_size == 0)
652 return -EPROTO;
653
654 ep = &htc->endpoint[assigned_eid];
655 ep->eid = assigned_eid;
656
657 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED)
658 return -EPROTO;
659
660 /* return assigned endpoint to caller */
661 conn_resp->eid = assigned_eid;
662 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
663 resp_msg->flags_len);
664
665 /* setup the endpoint */
666 ep->service_id = conn_req->service_id;
667 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
668 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
669 resp_msg->flags_len);
670 ep->tx_credits = tx_alloc;
671
672 /* copy all the callbacks */
673 ep->ep_ops = conn_req->ep_ops;
674
675 status = ath11k_ahb_map_service_to_pipe(htc->ab,
676 ep->service_id,
677 &ep->ul_pipe_id,
678 &ep->dl_pipe_id);
679 if (status)
680 return status;
681
682 ath11k_dbg(ab, ATH11K_DBG_BOOT,
683 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
684 htc_service_name(ep->service_id), ep->ul_pipe_id,
685 ep->dl_pipe_id, ep->eid);
686
687 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
688 ep->tx_credit_flow_enabled = false;
689 ath11k_dbg(ab, ATH11K_DBG_BOOT,
690 "boot htc service '%s' eid %d TX flow control disabled\n",
691 htc_service_name(ep->service_id), assigned_eid);
692 }
693
694 return status;
695 }
696
697 int ath11k_htc_start(struct ath11k_htc *htc)
698 {
699 struct sk_buff *skb;
700 int status = 0;
701 struct ath11k_base *ab = htc->ab;
702 struct ath11k_htc_setup_complete_extended *msg;
703
704 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
705 if (!skb)
706 return -ENOMEM;
707
708 skb_put(skb, sizeof(*msg));
709 memset(skb->data, 0, skb->len);
710
711 msg = (struct ath11k_htc_setup_complete_extended *)skb->data;
712 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID,
713 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID);
714
715 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n");
716
717 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
718 if (status) {
719 kfree_skb(skb);
720 return status;
721 }
722
723 return 0;
724 }
725
726 int ath11k_htc_init(struct ath11k_base *ab)
727 {
728 struct ath11k_htc *htc = &ab->htc;
729 struct ath11k_htc_svc_conn_req conn_req;
730 struct ath11k_htc_svc_conn_resp conn_resp;
731 int ret;
732
733 spin_lock_init(&htc->tx_lock);
734
735 ath11k_htc_reset_endpoint_states(htc);
736
737 htc->ab = ab;
738
739 switch (ab->wmi_ab.preferred_hw_mode) {
740 case WMI_HOST_HW_MODE_SINGLE:
741 htc->wmi_ep_count = 1;
742 break;
743 case WMI_HOST_HW_MODE_DBS:
744 case WMI_HOST_HW_MODE_DBS_OR_SBS:
745 htc->wmi_ep_count = 2;
746 break;
747 case WMI_HOST_HW_MODE_DBS_SBS:
748 htc->wmi_ep_count = 3;
749 break;
750 default:
751 htc->wmi_ep_count = 3;
752 break;
753 }
754
755 /* setup our pseudo HTC control endpoint connection */
756 memset(&conn_req, 0, sizeof(conn_req));
757 memset(&conn_resp, 0, sizeof(conn_resp));
758 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete;
759 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete;
760 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS;
761 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL;
762
763 /* connect fake service */
764 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp);
765 if (ret) {
766 ath11k_err(ab, "could not connect to htc service (%d)\n", ret);
767 return ret;
768 }
769
770 init_completion(&htc->ctl_resp);
771
772 return 0;
773 }
Linux with added FPC-III support