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
ath11k_htc_alloc_skb(struct ath11k_base * ab,int size)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
ath11k_htc_control_tx_complete(struct ath11k_base * ab,struct sk_buff * skb)28 static void ath11k_htc_control_tx_complete(struct ath11k_base *ab,
29 struct sk_buff *skb)
30 {
31 kfree_skb(skb);
32 }
33
ath11k_htc_build_tx_ctrl_skb(void * ab)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
ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep * ep,struct sk_buff * skb)53 static 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
ath11k_htc_send(struct ath11k_htc * htc,enum ath11k_htc_ep_id eid,struct sk_buff * skb)74 int 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 bool credit_flow_enabled = (ab->hw_params.credit_flow &&
85 ep->tx_credit_flow_enabled);
86
87 if (eid >= ATH11K_HTC_EP_COUNT) {
88 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid);
89 return -ENOENT;
90 }
91
92 skb_push(skb, sizeof(struct ath11k_htc_hdr));
93
94 if (credit_flow_enabled) {
95 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
96 spin_lock_bh(&htc->tx_lock);
97 if (ep->tx_credits < credits) {
98 ath11k_dbg(ab, ATH11K_DBG_HTC,
99 "htc insufficient credits ep %d required %d available %d\n",
100 eid, credits, ep->tx_credits);
101 spin_unlock_bh(&htc->tx_lock);
102 ret = -EAGAIN;
103 goto err_pull;
104 }
105 ep->tx_credits -= credits;
106 ath11k_dbg(ab, ATH11K_DBG_HTC,
107 "htc ep %d consumed %d credits (total %d)\n",
108 eid, credits, ep->tx_credits);
109 spin_unlock_bh(&htc->tx_lock);
110 }
111
112 ath11k_htc_prepare_tx_skb(ep, skb);
113
114 skb_cb->eid = eid;
115 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
116 ret = dma_mapping_error(dev, skb_cb->paddr);
117 if (ret) {
118 ret = -EIO;
119 goto err_credits;
120 }
121
122 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid);
123 if (ret)
124 goto err_unmap;
125
126 return 0;
127
128 err_unmap:
129 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
130 err_credits:
131 if (credit_flow_enabled) {
132 spin_lock_bh(&htc->tx_lock);
133 ep->tx_credits += credits;
134 ath11k_dbg(ab, ATH11K_DBG_HTC,
135 "htc ep %d reverted %d credits back (total %d)\n",
136 eid, credits, ep->tx_credits);
137 spin_unlock_bh(&htc->tx_lock);
138
139 if (ep->ep_ops.ep_tx_credits)
140 ep->ep_ops.ep_tx_credits(htc->ab);
141 }
142 err_pull:
143 skb_pull(skb, sizeof(struct ath11k_htc_hdr));
144 return ret;
145 }
146
147 static void
ath11k_htc_process_credit_report(struct ath11k_htc * htc,const struct ath11k_htc_credit_report * report,int len,enum ath11k_htc_ep_id eid)148 ath11k_htc_process_credit_report(struct ath11k_htc *htc,
149 const struct ath11k_htc_credit_report *report,
150 int len,
151 enum ath11k_htc_ep_id eid)
152 {
153 struct ath11k_base *ab = htc->ab;
154 struct ath11k_htc_ep *ep;
155 int i, n_reports;
156
157 if (len % sizeof(*report))
158 ath11k_warn(ab, "Uneven credit report len %d", len);
159
160 n_reports = len / sizeof(*report);
161
162 spin_lock_bh(&htc->tx_lock);
163 for (i = 0; i < n_reports; i++, report++) {
164 if (report->eid >= ATH11K_HTC_EP_COUNT)
165 break;
166
167 ep = &htc->endpoint[report->eid];
168 ep->tx_credits += report->credits;
169
170 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
171 report->eid, report->credits, ep->tx_credits);
172
173 if (ep->ep_ops.ep_tx_credits) {
174 spin_unlock_bh(&htc->tx_lock);
175 ep->ep_ops.ep_tx_credits(htc->ab);
176 spin_lock_bh(&htc->tx_lock);
177 }
178 }
179 spin_unlock_bh(&htc->tx_lock);
180 }
181
ath11k_htc_process_trailer(struct ath11k_htc * htc,u8 * buffer,int length,enum ath11k_htc_ep_id src_eid)182 static int ath11k_htc_process_trailer(struct ath11k_htc *htc,
183 u8 *buffer,
184 int length,
185 enum ath11k_htc_ep_id src_eid)
186 {
187 struct ath11k_base *ab = htc->ab;
188 int status = 0;
189 struct ath11k_htc_record *record;
190 size_t len;
191
192 while (length > 0) {
193 record = (struct ath11k_htc_record *)buffer;
194
195 if (length < sizeof(record->hdr)) {
196 status = -EINVAL;
197 break;
198 }
199
200 if (record->hdr.len > length) {
201 /* no room left in buffer for record */
202 ath11k_warn(ab, "Invalid record length: %d\n",
203 record->hdr.len);
204 status = -EINVAL;
205 break;
206 }
207
208 if (ab->hw_params.credit_flow) {
209 switch (record->hdr.id) {
210 case ATH11K_HTC_RECORD_CREDITS:
211 len = sizeof(struct ath11k_htc_credit_report);
212 if (record->hdr.len < len) {
213 ath11k_warn(ab, "Credit report too long\n");
214 status = -EINVAL;
215 break;
216 }
217 ath11k_htc_process_credit_report(htc,
218 record->credit_report,
219 record->hdr.len,
220 src_eid);
221 break;
222 default:
223 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n",
224 record->hdr.id, record->hdr.len);
225 break;
226 }
227 }
228
229 if (status)
230 break;
231
232 /* multiple records may be present in a trailer */
233 buffer += sizeof(record->hdr) + record->hdr.len;
234 length -= sizeof(record->hdr) + record->hdr.len;
235 }
236
237 return status;
238 }
239
ath11k_htc_suspend_complete(struct ath11k_base * ab,bool ack)240 static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack)
241 {
242 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot suspend complete %d\n", ack);
243
244 if (ack)
245 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
246 else
247 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
248
249 complete(&ab->htc_suspend);
250 }
251
ath11k_htc_tx_completion_handler(struct ath11k_base * ab,struct sk_buff * skb)252 void ath11k_htc_tx_completion_handler(struct ath11k_base *ab,
253 struct sk_buff *skb)
254 {
255 struct ath11k_htc *htc = &ab->htc;
256 struct ath11k_htc_ep *ep;
257 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *);
258 u8 eid;
259
260 eid = ATH11K_SKB_CB(skb)->eid;
261 if (eid >= ATH11K_HTC_EP_COUNT) {
262 dev_kfree_skb_any(skb);
263 return;
264 }
265
266 ep = &htc->endpoint[eid];
267 spin_lock_bh(&htc->tx_lock);
268 ep_tx_complete = ep->ep_ops.ep_tx_complete;
269 spin_unlock_bh(&htc->tx_lock);
270 if (!ep_tx_complete) {
271 dev_kfree_skb_any(skb);
272 return;
273 }
274 ep_tx_complete(htc->ab, skb);
275 }
276
ath11k_htc_wakeup_from_suspend(struct ath11k_base * ab)277 static void ath11k_htc_wakeup_from_suspend(struct ath11k_base *ab)
278 {
279 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot wakeup from suspend is received\n");
280 }
281
ath11k_htc_rx_completion_handler(struct ath11k_base * ab,struct sk_buff * skb)282 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab,
283 struct sk_buff *skb)
284 {
285 int status = 0;
286 struct ath11k_htc *htc = &ab->htc;
287 struct ath11k_htc_hdr *hdr;
288 struct ath11k_htc_ep *ep;
289 u16 payload_len;
290 u32 trailer_len = 0;
291 size_t min_len;
292 u8 eid;
293 bool trailer_present;
294
295 hdr = (struct ath11k_htc_hdr *)skb->data;
296 skb_pull(skb, sizeof(*hdr));
297
298 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info);
299
300 if (eid >= ATH11K_HTC_EP_COUNT) {
301 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid);
302 goto out;
303 }
304
305 ep = &htc->endpoint[eid];
306
307 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info);
308
309 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) {
310 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n",
311 payload_len + sizeof(*hdr));
312 goto out;
313 }
314
315 if (skb->len < payload_len) {
316 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n",
317 skb->len, payload_len);
318 goto out;
319 }
320
321 /* get flags to check for trailer */
322 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) &
323 ATH11K_HTC_FLAG_TRAILER_PRESENT;
324
325 if (trailer_present) {
326 u8 *trailer;
327
328 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info);
329 min_len = sizeof(struct ath11k_htc_record_hdr);
330
331 if ((trailer_len < min_len) ||
332 (trailer_len > payload_len)) {
333 ath11k_warn(ab, "Invalid trailer length: %d\n",
334 trailer_len);
335 goto out;
336 }
337
338 trailer = (u8 *)hdr;
339 trailer += sizeof(*hdr);
340 trailer += payload_len;
341 trailer -= trailer_len;
342 status = ath11k_htc_process_trailer(htc, trailer,
343 trailer_len, eid);
344 if (status)
345 goto out;
346
347 skb_trim(skb, skb->len - trailer_len);
348 }
349
350 if (trailer_len >= payload_len)
351 /* zero length packet with trailer data, just drop these */
352 goto out;
353
354 if (eid == ATH11K_HTC_EP_0) {
355 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data;
356
357 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) {
358 case ATH11K_HTC_MSG_READY_ID:
359 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
360 /* handle HTC control message */
361 if (completion_done(&htc->ctl_resp)) {
362 /* this is a fatal error, target should not be
363 * sending unsolicited messages on the ep 0
364 */
365 ath11k_warn(ab, "HTC rx ctrl still processing\n");
366 complete(&htc->ctl_resp);
367 goto out;
368 }
369
370 htc->control_resp_len =
371 min_t(int, skb->len,
372 ATH11K_HTC_MAX_CTRL_MSG_LEN);
373
374 memcpy(htc->control_resp_buffer, skb->data,
375 htc->control_resp_len);
376
377 complete(&htc->ctl_resp);
378 break;
379 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE:
380 ath11k_htc_suspend_complete(ab, true);
381 break;
382 case ATH11K_HTC_MSG_NACK_SUSPEND:
383 ath11k_htc_suspend_complete(ab, false);
384 break;
385 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID:
386 ath11k_htc_wakeup_from_suspend(ab);
387 break;
388 default:
389 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n",
390 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id));
391 break;
392 }
393 goto out;
394 }
395
396 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
397 eid, skb);
398 ep->ep_ops.ep_rx_complete(ab, skb);
399
400 /* poll tx completion for interrupt disabled CE's */
401 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id);
402
403 /* skb is now owned by the rx completion handler */
404 skb = NULL;
405 out:
406 kfree_skb(skb);
407 }
408
ath11k_htc_control_rx_complete(struct ath11k_base * ab,struct sk_buff * skb)409 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab,
410 struct sk_buff *skb)
411 {
412 /* This is unexpected. FW is not supposed to send regular rx on this
413 * endpoint.
414 */
415 ath11k_warn(ab, "unexpected htc rx\n");
416 kfree_skb(skb);
417 }
418
htc_service_name(enum ath11k_htc_svc_id id)419 static const char *htc_service_name(enum ath11k_htc_svc_id id)
420 {
421 switch (id) {
422 case ATH11K_HTC_SVC_ID_RESERVED:
423 return "Reserved";
424 case ATH11K_HTC_SVC_ID_RSVD_CTRL:
425 return "Control";
426 case ATH11K_HTC_SVC_ID_WMI_CONTROL:
427 return "WMI";
428 case ATH11K_HTC_SVC_ID_WMI_DATA_BE:
429 return "DATA BE";
430 case ATH11K_HTC_SVC_ID_WMI_DATA_BK:
431 return "DATA BK";
432 case ATH11K_HTC_SVC_ID_WMI_DATA_VI:
433 return "DATA VI";
434 case ATH11K_HTC_SVC_ID_WMI_DATA_VO:
435 return "DATA VO";
436 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1:
437 return "WMI MAC1";
438 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2:
439 return "WMI MAC2";
440 case ATH11K_HTC_SVC_ID_NMI_CONTROL:
441 return "NMI Control";
442 case ATH11K_HTC_SVC_ID_NMI_DATA:
443 return "NMI Data";
444 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG:
445 return "HTT Data";
446 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS:
447 return "RAW";
448 case ATH11K_HTC_SVC_ID_IPA_TX:
449 return "IPA TX";
450 case ATH11K_HTC_SVC_ID_PKT_LOG:
451 return "PKT LOG";
452 }
453
454 return "Unknown";
455 }
456
ath11k_htc_reset_endpoint_states(struct ath11k_htc * htc)457 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc)
458 {
459 struct ath11k_htc_ep *ep;
460 int i;
461
462 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) {
463 ep = &htc->endpoint[i];
464 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED;
465 ep->max_ep_message_len = 0;
466 ep->max_tx_queue_depth = 0;
467 ep->eid = i;
468 ep->htc = htc;
469 ep->tx_credit_flow_enabled = true;
470 }
471 }
472
ath11k_htc_get_credit_allocation(struct ath11k_htc * htc,u16 service_id)473 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc,
474 u16 service_id)
475 {
476 u8 i, allocation = 0;
477
478 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) {
479 if (htc->service_alloc_table[i].service_id == service_id) {
480 allocation =
481 htc->service_alloc_table[i].credit_allocation;
482 }
483 }
484
485 return allocation;
486 }
487
ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc * htc)488 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc)
489 {
490 struct ath11k_htc_svc_tx_credits *serv_entry;
491 u32 svc_id[] = {
492 ATH11K_HTC_SVC_ID_WMI_CONTROL,
493 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1,
494 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2,
495 };
496 int i, credits;
497
498 credits = htc->total_transmit_credits;
499 serv_entry = htc->service_alloc_table;
500
501 if ((htc->wmi_ep_count == 0) ||
502 (htc->wmi_ep_count > ARRAY_SIZE(svc_id)))
503 return -EINVAL;
504
505 /* Divide credits among number of endpoints for WMI */
506 credits = credits / htc->wmi_ep_count;
507 for (i = 0; i < htc->wmi_ep_count; i++) {
508 serv_entry[i].service_id = svc_id[i];
509 serv_entry[i].credit_allocation = credits;
510 }
511
512 return 0;
513 }
514
ath11k_htc_wait_target(struct ath11k_htc * htc)515 int ath11k_htc_wait_target(struct ath11k_htc *htc)
516 {
517 int i, status = 0;
518 struct ath11k_base *ab = htc->ab;
519 unsigned long time_left;
520 struct ath11k_htc_ready *ready;
521 u16 message_id;
522 u16 credit_count;
523 u16 credit_size;
524
525 time_left = wait_for_completion_timeout(&htc->ctl_resp,
526 ATH11K_HTC_WAIT_TIMEOUT_HZ);
527 if (!time_left) {
528 ath11k_warn(ab, "failed to receive control response completion, polling..\n");
529
530 for (i = 0; i < ab->hw_params.ce_count; i++)
531 ath11k_ce_per_engine_service(htc->ab, i);
532
533 time_left =
534 wait_for_completion_timeout(&htc->ctl_resp,
535 ATH11K_HTC_WAIT_TIMEOUT_HZ);
536
537 if (!time_left)
538 status = -ETIMEDOUT;
539 }
540
541 if (status < 0) {
542 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status);
543 return status;
544 }
545
546 if (htc->control_resp_len < sizeof(*ready)) {
547 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n",
548 htc->control_resp_len);
549 return -ECOMM;
550 }
551
552 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer;
553 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count);
554 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT,
555 ready->id_credit_count);
556 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep);
557
558 if (message_id != ATH11K_HTC_MSG_READY_ID) {
559 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id);
560 return -ECOMM;
561 }
562
563 htc->total_transmit_credits = credit_count;
564 htc->target_credit_size = credit_size;
565
566 ath11k_dbg(ab, ATH11K_DBG_HTC,
567 "Target ready! transmit resources: %d size:%d\n",
568 htc->total_transmit_credits, htc->target_credit_size);
569
570 if ((htc->total_transmit_credits == 0) ||
571 (htc->target_credit_size == 0)) {
572 ath11k_warn(ab, "Invalid credit size received\n");
573 return -ECOMM;
574 }
575
576 /* For QCA6390, wmi endpoint uses 1 credit to avoid
577 * back-to-back write.
578 */
579 if (ab->hw_params.supports_shadow_regs)
580 htc->total_transmit_credits = 1;
581
582 ath11k_htc_setup_target_buffer_assignments(htc);
583
584 return 0;
585 }
586
ath11k_htc_connect_service(struct ath11k_htc * htc,struct ath11k_htc_svc_conn_req * conn_req,struct ath11k_htc_svc_conn_resp * conn_resp)587 int ath11k_htc_connect_service(struct ath11k_htc *htc,
588 struct ath11k_htc_svc_conn_req *conn_req,
589 struct ath11k_htc_svc_conn_resp *conn_resp)
590 {
591 struct ath11k_base *ab = htc->ab;
592 struct ath11k_htc_conn_svc *req_msg;
593 struct ath11k_htc_conn_svc_resp resp_msg_dummy;
594 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy;
595 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT;
596 struct ath11k_htc_ep *ep;
597 struct sk_buff *skb;
598 unsigned int max_msg_size = 0;
599 int length, status;
600 unsigned long time_left;
601 bool disable_credit_flow_ctrl = false;
602 u16 message_id, service_id, flags = 0;
603 u8 tx_alloc = 0;
604
605 /* special case for HTC pseudo control service */
606 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) {
607 disable_credit_flow_ctrl = true;
608 assigned_eid = ATH11K_HTC_EP_0;
609 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN;
610 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
611 goto setup;
612 }
613
614 tx_alloc = ath11k_htc_get_credit_allocation(htc,
615 conn_req->service_id);
616 if (!tx_alloc)
617 ath11k_dbg(ab, ATH11K_DBG_BOOT,
618 "boot htc service %s does not allocate target credits\n",
619 htc_service_name(conn_req->service_id));
620
621 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
622 if (!skb) {
623 ath11k_warn(ab, "Failed to allocate HTC packet\n");
624 return -ENOMEM;
625 }
626
627 length = sizeof(*req_msg);
628 skb_put(skb, length);
629 memset(skb->data, 0, length);
630
631 req_msg = (struct ath11k_htc_conn_svc *)skb->data;
632 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID,
633 ATH11K_HTC_MSG_CONNECT_SERVICE_ID);
634
635 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc);
636
637 /* Only enable credit flow control for WMI ctrl service */
638 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL ||
639 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 ||
640 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) {
641 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
642 disable_credit_flow_ctrl = true;
643 }
644
645 if (!ab->hw_params.credit_flow) {
646 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
647 disable_credit_flow_ctrl = true;
648 }
649
650 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags);
651 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID,
652 conn_req->service_id);
653
654 reinit_completion(&htc->ctl_resp);
655
656 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
657 if (status) {
658 kfree_skb(skb);
659 return status;
660 }
661
662 /* wait for response */
663 time_left = wait_for_completion_timeout(&htc->ctl_resp,
664 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ);
665 if (!time_left) {
666 ath11k_err(ab, "Service connect timeout\n");
667 return -ETIMEDOUT;
668 }
669
670 /* we controlled the buffer creation, it's aligned */
671 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer;
672 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id);
673 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID,
674 resp_msg->msg_svc_id);
675
676 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
677 (htc->control_resp_len < sizeof(*resp_msg))) {
678 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id);
679 return -EPROTO;
680 }
681
682 ath11k_dbg(ab, ATH11K_DBG_HTC,
683 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n",
684 htc_service_name(service_id),
685 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len),
686 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len));
687
688 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS,
689 resp_msg->flags_len);
690
691 /* check response status */
692 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) {
693 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n",
694 htc_service_name(service_id),
695 conn_resp->connect_resp_code);
696 return -EPROTO;
697 }
698
699 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET(
700 HTC_SVC_RESP_MSG_ENDPOINTID,
701 resp_msg->flags_len);
702
703 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
704 resp_msg->flags_len);
705
706 setup:
707
708 if (assigned_eid >= ATH11K_HTC_EP_COUNT)
709 return -EPROTO;
710
711 if (max_msg_size == 0)
712 return -EPROTO;
713
714 ep = &htc->endpoint[assigned_eid];
715 ep->eid = assigned_eid;
716
717 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED)
718 return -EPROTO;
719
720 /* return assigned endpoint to caller */
721 conn_resp->eid = assigned_eid;
722 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
723 resp_msg->flags_len);
724
725 /* setup the endpoint */
726 ep->service_id = conn_req->service_id;
727 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
728 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE,
729 resp_msg->flags_len);
730 ep->tx_credits = tx_alloc;
731
732 /* copy all the callbacks */
733 ep->ep_ops = conn_req->ep_ops;
734
735 status = ath11k_hif_map_service_to_pipe(htc->ab,
736 ep->service_id,
737 &ep->ul_pipe_id,
738 &ep->dl_pipe_id);
739 if (status)
740 return status;
741
742 ath11k_dbg(ab, ATH11K_DBG_BOOT,
743 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
744 htc_service_name(ep->service_id), ep->ul_pipe_id,
745 ep->dl_pipe_id, ep->eid);
746
747 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
748 ep->tx_credit_flow_enabled = false;
749 ath11k_dbg(ab, ATH11K_DBG_BOOT,
750 "boot htc service '%s' eid %d TX flow control disabled\n",
751 htc_service_name(ep->service_id), assigned_eid);
752 }
753
754 return status;
755 }
756
ath11k_htc_start(struct ath11k_htc * htc)757 int ath11k_htc_start(struct ath11k_htc *htc)
758 {
759 struct sk_buff *skb;
760 int status = 0;
761 struct ath11k_base *ab = htc->ab;
762 struct ath11k_htc_setup_complete_extended *msg;
763
764 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab);
765 if (!skb)
766 return -ENOMEM;
767
768 skb_put(skb, sizeof(*msg));
769 memset(skb->data, 0, skb->len);
770
771 msg = (struct ath11k_htc_setup_complete_extended *)skb->data;
772 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID,
773 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID);
774
775 if (ab->hw_params.credit_flow)
776 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n");
777 else
778 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW;
779
780 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb);
781 if (status) {
782 kfree_skb(skb);
783 return status;
784 }
785
786 return 0;
787 }
788
ath11k_htc_init(struct ath11k_base * ab)789 int ath11k_htc_init(struct ath11k_base *ab)
790 {
791 struct ath11k_htc *htc = &ab->htc;
792 struct ath11k_htc_svc_conn_req conn_req;
793 struct ath11k_htc_svc_conn_resp conn_resp;
794 int ret;
795
796 spin_lock_init(&htc->tx_lock);
797
798 ath11k_htc_reset_endpoint_states(htc);
799
800 htc->ab = ab;
801
802 switch (ab->wmi_ab.preferred_hw_mode) {
803 case WMI_HOST_HW_MODE_SINGLE:
804 htc->wmi_ep_count = 1;
805 break;
806 case WMI_HOST_HW_MODE_DBS:
807 case WMI_HOST_HW_MODE_DBS_OR_SBS:
808 htc->wmi_ep_count = 2;
809 break;
810 case WMI_HOST_HW_MODE_DBS_SBS:
811 htc->wmi_ep_count = 3;
812 break;
813 default:
814 htc->wmi_ep_count = ab->hw_params.max_radios;
815 break;
816 }
817
818 /* setup our pseudo HTC control endpoint connection */
819 memset(&conn_req, 0, sizeof(conn_req));
820 memset(&conn_resp, 0, sizeof(conn_resp));
821 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete;
822 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete;
823 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS;
824 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL;
825
826 /* connect fake service */
827 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp);
828 if (ret) {
829 ath11k_err(ab, "could not connect to htc service (%d)\n", ret);
830 return ret;
831 }
832
833 init_completion(&htc->ctl_resp);
834
835 return 0;
836 }
837
