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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath10k / htc.c
blob28daed5981a11570270762d97afdf5790d6902f7
1 /*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include "core.h"
19 #include "hif.h"
20 #include "debug.h"
21
22 /********/
23 /* Send */
24 /********/
25
26 static void ath10k_htc_control_tx_complete(struct ath10k *ar,
27 struct sk_buff *skb)
28 {
29 kfree_skb(skb);
30 }
31
32 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
33 {
34 struct sk_buff *skb;
35 struct ath10k_skb_cb *skb_cb;
36
37 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
38 if (!skb)
39 return NULL;
40
41 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
42 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
43
44 skb_cb = ATH10K_SKB_CB(skb);
45 memset(skb_cb, 0, sizeof(*skb_cb));
46
47 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb);
48 return skb;
49 }
50
51 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
52 struct sk_buff *skb)
53 {
54 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
55
56 if (htc->ar->dev_type != ATH10K_DEV_TYPE_HL)
57 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
58 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
59 }
60
61 void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
62 struct sk_buff *skb)
63 {
64 struct ath10k *ar = ep->htc->ar;
65
66 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__,
67 ep->eid, skb);
68
69 ath10k_htc_restore_tx_skb(ep->htc, skb);
70
71 if (!ep->ep_ops.ep_tx_complete) {
72 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
73 dev_kfree_skb_any(skb);
74 return;
75 }
76
77 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
78 }
79 EXPORT_SYMBOL(ath10k_htc_notify_tx_completion);
80
81 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
82 struct sk_buff *skb)
83 {
84 struct ath10k_htc_hdr *hdr;
85
86 hdr = (struct ath10k_htc_hdr *)skb->data;
87
88 hdr->eid = ep->eid;
89 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
90 hdr->flags = 0;
91 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
92
93 spin_lock_bh(&ep->htc->tx_lock);
94 hdr->seq_no = ep->seq_no++;
95 spin_unlock_bh(&ep->htc->tx_lock);
96 }
97
98 int ath10k_htc_send(struct ath10k_htc *htc,
99 enum ath10k_htc_ep_id eid,
100 struct sk_buff *skb)
101 {
102 struct ath10k *ar = htc->ar;
103 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
104 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
105 struct ath10k_hif_sg_item sg_item;
106 struct device *dev = htc->ar->dev;
107 int credits = 0;
108 int ret;
109
110 if (htc->ar->state == ATH10K_STATE_WEDGED)
111 return -ECOMM;
112
113 if (eid >= ATH10K_HTC_EP_COUNT) {
114 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
115 return -ENOENT;
116 }
117
118 skb_push(skb, sizeof(struct ath10k_htc_hdr));
119
120 if (ep->tx_credit_flow_enabled) {
121 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
122 spin_lock_bh(&htc->tx_lock);
123 if (ep->tx_credits < credits) {
124 ath10k_dbg(ar, ATH10K_DBG_HTC,
125 "htc insufficient credits ep %d required %d available %d\n",
126 eid, credits, ep->tx_credits);
127 spin_unlock_bh(&htc->tx_lock);
128 ret = -EAGAIN;
129 goto err_pull;
130 }
131 ep->tx_credits -= credits;
132 ath10k_dbg(ar, ATH10K_DBG_HTC,
133 "htc ep %d consumed %d credits (total %d)\n",
134 eid, credits, ep->tx_credits);
135 spin_unlock_bh(&htc->tx_lock);
136 }
137
138 ath10k_htc_prepare_tx_skb(ep, skb);
139
140 skb_cb->eid = eid;
141 if (ar->dev_type != ATH10K_DEV_TYPE_HL) {
142 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len,
143 DMA_TO_DEVICE);
144 ret = dma_mapping_error(dev, skb_cb->paddr);
145 if (ret) {
146 ret = -EIO;
147 goto err_credits;
148 }
149 }
150
151 sg_item.transfer_id = ep->eid;
152 sg_item.transfer_context = skb;
153 sg_item.vaddr = skb->data;
154 sg_item.paddr = skb_cb->paddr;
155 sg_item.len = skb->len;
156
157 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
158 if (ret)
159 goto err_unmap;
160
161 return 0;
162
163 err_unmap:
164 if (ar->dev_type != ATH10K_DEV_TYPE_HL)
165 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
166 err_credits:
167 if (ep->tx_credit_flow_enabled) {
168 spin_lock_bh(&htc->tx_lock);
169 ep->tx_credits += credits;
170 ath10k_dbg(ar, ATH10K_DBG_HTC,
171 "htc ep %d reverted %d credits back (total %d)\n",
172 eid, credits, ep->tx_credits);
173 spin_unlock_bh(&htc->tx_lock);
174
175 if (ep->ep_ops.ep_tx_credits)
176 ep->ep_ops.ep_tx_credits(htc->ar);
177 }
178 err_pull:
179 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
180 return ret;
181 }
182
183 void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
184 {
185 struct ath10k_htc *htc = &ar->htc;
186 struct ath10k_skb_cb *skb_cb;
187 struct ath10k_htc_ep *ep;
188
189 if (WARN_ON_ONCE(!skb))
190 return;
191
192 skb_cb = ATH10K_SKB_CB(skb);
193 ep = &htc->endpoint[skb_cb->eid];
194
195 ath10k_htc_notify_tx_completion(ep, skb);
196 /* the skb now belongs to the completion handler */
197 }
198 EXPORT_SYMBOL(ath10k_htc_tx_completion_handler);
199
200 /***********/
201 /* Receive */
202 /***********/
203
204 static void
205 ath10k_htc_process_credit_report(struct ath10k_htc *htc,
206 const struct ath10k_htc_credit_report *report,
207 int len,
208 enum ath10k_htc_ep_id eid)
209 {
210 struct ath10k *ar = htc->ar;
211 struct ath10k_htc_ep *ep;
212 int i, n_reports;
213
214 if (len % sizeof(*report))
215 ath10k_warn(ar, "Uneven credit report len %d", len);
216
217 n_reports = len / sizeof(*report);
218
219 spin_lock_bh(&htc->tx_lock);
220 for (i = 0; i < n_reports; i++, report++) {
221 if (report->eid >= ATH10K_HTC_EP_COUNT)
222 break;
223
224 ep = &htc->endpoint[report->eid];
225 ep->tx_credits += report->credits;
226
227 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
228 report->eid, report->credits, ep->tx_credits);
229
230 if (ep->ep_ops.ep_tx_credits) {
231 spin_unlock_bh(&htc->tx_lock);
232 ep->ep_ops.ep_tx_credits(htc->ar);
233 spin_lock_bh(&htc->tx_lock);
234 }
235 }
236 spin_unlock_bh(&htc->tx_lock);
237 }
238
239 static int
240 ath10k_htc_process_lookahead(struct ath10k_htc *htc,
241 const struct ath10k_htc_lookahead_report *report,
242 int len,
243 enum ath10k_htc_ep_id eid,
244 void *next_lookaheads,
245 int *next_lookaheads_len)
246 {
247 struct ath10k *ar = htc->ar;
248
249 /* Invalid lookahead flags are actually transmitted by
250 * the target in the HTC control message.
251 * Since this will happen at every boot we silently ignore
252 * the lookahead in this case
253 */
254 if (report->pre_valid != ((~report->post_valid) & 0xFF))
255 return 0;
256
257 if (next_lookaheads && next_lookaheads_len) {
258 ath10k_dbg(ar, ATH10K_DBG_HTC,
259 "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n",
260 report->pre_valid, report->post_valid);
261
262 /* look ahead bytes are valid, copy them over */
263 memcpy((u8 *)next_lookaheads, report->lookahead, 4);
264
265 *next_lookaheads_len = 1;
266 }
267
268 return 0;
269 }
270
271 static int
272 ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc,
273 const struct ath10k_htc_lookahead_bundle *report,
274 int len,
275 enum ath10k_htc_ep_id eid,
276 void *next_lookaheads,
277 int *next_lookaheads_len)
278 {
279 struct ath10k *ar = htc->ar;
280 int bundle_cnt = len / sizeof(*report);
281
282 if (!bundle_cnt || (bundle_cnt > HTC_HOST_MAX_MSG_PER_RX_BUNDLE)) {
283 ath10k_warn(ar, "Invalid lookahead bundle count: %d\n",
284 bundle_cnt);
285 return -EINVAL;
286 }
287
288 if (next_lookaheads && next_lookaheads_len) {
289 int i;
290
291 for (i = 0; i < bundle_cnt; i++) {
292 memcpy(((u8 *)next_lookaheads) + 4 * i,
293 report->lookahead, 4);
294 report++;
295 }
296
297 *next_lookaheads_len = bundle_cnt;
298 }
299
300 return 0;
301 }
302
303 int ath10k_htc_process_trailer(struct ath10k_htc *htc,
304 u8 *buffer,
305 int length,
306 enum ath10k_htc_ep_id src_eid,
307 void *next_lookaheads,
308 int *next_lookaheads_len)
309 {
310 struct ath10k_htc_lookahead_bundle *bundle;
311 struct ath10k *ar = htc->ar;
312 int status = 0;
313 struct ath10k_htc_record *record;
314 u8 *orig_buffer;
315 int orig_length;
316 size_t len;
317
318 orig_buffer = buffer;
319 orig_length = length;
320
321 while (length > 0) {
322 record = (struct ath10k_htc_record *)buffer;
323
324 if (length < sizeof(record->hdr)) {
325 status = -EINVAL;
326 break;
327 }
328
329 if (record->hdr.len > length) {
330 /* no room left in buffer for record */
331 ath10k_warn(ar, "Invalid record length: %d\n",
332 record->hdr.len);
333 status = -EINVAL;
334 break;
335 }
336
337 switch (record->hdr.id) {
338 case ATH10K_HTC_RECORD_CREDITS:
339 len = sizeof(struct ath10k_htc_credit_report);
340 if (record->hdr.len < len) {
341 ath10k_warn(ar, "Credit report too long\n");
342 status = -EINVAL;
343 break;
344 }
345 ath10k_htc_process_credit_report(htc,
346 record->credit_report,
347 record->hdr.len,
348 src_eid);
349 break;
350 case ATH10K_HTC_RECORD_LOOKAHEAD:
351 len = sizeof(struct ath10k_htc_lookahead_report);
352 if (record->hdr.len < len) {
353 ath10k_warn(ar, "Lookahead report too long\n");
354 status = -EINVAL;
355 break;
356 }
357 status = ath10k_htc_process_lookahead(htc,
358 record->lookahead_report,
359 record->hdr.len,
360 src_eid,
361 next_lookaheads,
362 next_lookaheads_len);
363 break;
364 case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE:
365 bundle = record->lookahead_bundle;
366 status = ath10k_htc_process_lookahead_bundle(htc,
367 bundle,
368 record->hdr.len,
369 src_eid,
370 next_lookaheads,
371 next_lookaheads_len);
372 break;
373 default:
374 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
375 record->hdr.id, record->hdr.len);
376 break;
377 }
378
379 if (status)
380 break;
381
382 /* multiple records may be present in a trailer */
383 buffer += sizeof(record->hdr) + record->hdr.len;
384 length -= sizeof(record->hdr) + record->hdr.len;
385 }
386
387 if (status)
388 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
389 orig_buffer, orig_length);
390
391 return status;
392 }
393 EXPORT_SYMBOL(ath10k_htc_process_trailer);
394
395 void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
396 {
397 int status = 0;
398 struct ath10k_htc *htc = &ar->htc;
399 struct ath10k_htc_hdr *hdr;
400 struct ath10k_htc_ep *ep;
401 u16 payload_len;
402 u32 trailer_len = 0;
403 size_t min_len;
404 u8 eid;
405 bool trailer_present;
406
407 hdr = (struct ath10k_htc_hdr *)skb->data;
408 skb_pull(skb, sizeof(*hdr));
409
410 eid = hdr->eid;
411
412 if (eid >= ATH10K_HTC_EP_COUNT) {
413 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
414 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
415 hdr, sizeof(*hdr));
416 goto out;
417 }
418
419 ep = &htc->endpoint[eid];
420
421 payload_len = __le16_to_cpu(hdr->len);
422
423 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
424 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
425 payload_len + sizeof(*hdr));
426 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
427 hdr, sizeof(*hdr));
428 goto out;
429 }
430
431 if (skb->len < payload_len) {
432 ath10k_dbg(ar, ATH10K_DBG_HTC,
433 "HTC Rx: insufficient length, got %d, expected %d\n",
434 skb->len, payload_len);
435 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
436 "", hdr, sizeof(*hdr));
437 goto out;
438 }
439
440 /* get flags to check for trailer */
441 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
442 if (trailer_present) {
443 u8 *trailer;
444
445 trailer_len = hdr->trailer_len;
446 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
447
448 if ((trailer_len < min_len) ||
449 (trailer_len > payload_len)) {
450 ath10k_warn(ar, "Invalid trailer length: %d\n",
451 trailer_len);
452 goto out;
453 }
454
455 trailer = (u8 *)hdr;
456 trailer += sizeof(*hdr);
457 trailer += payload_len;
458 trailer -= trailer_len;
459 status = ath10k_htc_process_trailer(htc, trailer,
460 trailer_len, hdr->eid,
461 NULL, NULL);
462 if (status)
463 goto out;
464
465 skb_trim(skb, skb->len - trailer_len);
466 }
467
468 if (((int)payload_len - (int)trailer_len) <= 0)
469 /* zero length packet with trailer data, just drop these */
470 goto out;
471
472 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
473 eid, skb);
474 ep->ep_ops.ep_rx_complete(ar, skb);
475
476 /* skb is now owned by the rx completion handler */
477 skb = NULL;
478 out:
479 kfree_skb(skb);
480 }
481 EXPORT_SYMBOL(ath10k_htc_rx_completion_handler);
482
483 static void ath10k_htc_control_rx_complete(struct ath10k *ar,
484 struct sk_buff *skb)
485 {
486 struct ath10k_htc *htc = &ar->htc;
487 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
488
489 switch (__le16_to_cpu(msg->hdr.message_id)) {
490 case ATH10K_HTC_MSG_READY_ID:
491 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
492 /* handle HTC control message */
493 if (completion_done(&htc->ctl_resp)) {
494 /* this is a fatal error, target should not be
495 * sending unsolicited messages on the ep 0
496 */
497 ath10k_warn(ar, "HTC rx ctrl still processing\n");
498 complete(&htc->ctl_resp);
499 goto out;
500 }
501
502 htc->control_resp_len =
503 min_t(int, skb->len,
504 ATH10K_HTC_MAX_CTRL_MSG_LEN);
505
506 memcpy(htc->control_resp_buffer, skb->data,
507 htc->control_resp_len);
508
509 complete(&htc->ctl_resp);
510 break;
511 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
512 htc->htc_ops.target_send_suspend_complete(ar);
513 break;
514 default:
515 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
516 break;
517 }
518
519 out:
520 kfree_skb(skb);
521 }
522
523 /***************/
524 /* Init/Deinit */
525 /***************/
526
527 static const char *htc_service_name(enum ath10k_htc_svc_id id)
528 {
529 switch (id) {
530 case ATH10K_HTC_SVC_ID_RESERVED:
531 return "Reserved";
532 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
533 return "Control";
534 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
535 return "WMI";
536 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
537 return "DATA BE";
538 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
539 return "DATA BK";
540 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
541 return "DATA VI";
542 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
543 return "DATA VO";
544 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
545 return "NMI Control";
546 case ATH10K_HTC_SVC_ID_NMI_DATA:
547 return "NMI Data";
548 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
549 return "HTT Data";
550 case ATH10K_HTC_SVC_ID_HTT_DATA2_MSG:
551 return "HTT Data";
552 case ATH10K_HTC_SVC_ID_HTT_DATA3_MSG:
553 return "HTT Data";
554 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
555 return "RAW";
556 case ATH10K_HTC_SVC_ID_HTT_LOG_MSG:
557 return "PKTLOG";
558 }
559
560 return "Unknown";
561 }
562
563 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
564 {
565 struct ath10k_htc_ep *ep;
566 int i;
567
568 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
569 ep = &htc->endpoint[i];
570 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
571 ep->max_ep_message_len = 0;
572 ep->max_tx_queue_depth = 0;
573 ep->eid = i;
574 ep->htc = htc;
575 ep->tx_credit_flow_enabled = true;
576 }
577 }
578
579 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
580 u16 service_id)
581 {
582 u8 allocation = 0;
583
584 /* The WMI control service is the only service with flow control.
585 * Let it have all transmit credits.
586 */
587 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL)
588 allocation = htc->total_transmit_credits;
589
590 return allocation;
591 }
592
593 int ath10k_htc_wait_target(struct ath10k_htc *htc)
594 {
595 struct ath10k *ar = htc->ar;
596 int i, status = 0;
597 unsigned long time_left;
598 struct ath10k_htc_msg *msg;
599 u16 message_id;
600
601 time_left = wait_for_completion_timeout(&htc->ctl_resp,
602 ATH10K_HTC_WAIT_TIMEOUT_HZ);
603 if (!time_left) {
604 /* Workaround: In some cases the PCI HIF doesn't
605 * receive interrupt for the control response message
606 * even if the buffer was completed. It is suspected
607 * iomap writes unmasking PCI CE irqs aren't propagated
608 * properly in KVM PCI-passthrough sometimes.
609 */
610 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
611
612 for (i = 0; i < CE_COUNT; i++)
613 ath10k_hif_send_complete_check(htc->ar, i, 1);
614
615 time_left =
616 wait_for_completion_timeout(&htc->ctl_resp,
617 ATH10K_HTC_WAIT_TIMEOUT_HZ);
618
619 if (!time_left)
620 status = -ETIMEDOUT;
621 }
622
623 if (status < 0) {
624 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
625 return status;
626 }
627
628 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
629 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
630 htc->control_resp_len);
631 return -ECOMM;
632 }
633
634 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
635 message_id = __le16_to_cpu(msg->hdr.message_id);
636
637 if (message_id != ATH10K_HTC_MSG_READY_ID) {
638 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
639 return -ECOMM;
640 }
641
642 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
643 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
644
645 ath10k_dbg(ar, ATH10K_DBG_HTC,
646 "Target ready! transmit resources: %d size:%d\n",
647 htc->total_transmit_credits,
648 htc->target_credit_size);
649
650 if ((htc->total_transmit_credits == 0) ||
651 (htc->target_credit_size == 0)) {
652 ath10k_err(ar, "Invalid credit size received\n");
653 return -ECOMM;
654 }
655
656 /* The only way to determine if the ready message is an extended
657 * message is from the size.
658 */
659 if (htc->control_resp_len >=
660 sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
661 htc->max_msgs_per_htc_bundle =
662 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
663 HTC_HOST_MAX_MSG_PER_RX_BUNDLE);
664 ath10k_dbg(ar, ATH10K_DBG_HTC,
665 "Extended ready message. RX bundle size: %d\n",
666 htc->max_msgs_per_htc_bundle);
667 }
668
669 return 0;
670 }
671
672 int ath10k_htc_connect_service(struct ath10k_htc *htc,
673 struct ath10k_htc_svc_conn_req *conn_req,
674 struct ath10k_htc_svc_conn_resp *conn_resp)
675 {
676 struct ath10k *ar = htc->ar;
677 struct ath10k_htc_msg *msg;
678 struct ath10k_htc_conn_svc *req_msg;
679 struct ath10k_htc_conn_svc_response resp_msg_dummy;
680 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
681 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
682 struct ath10k_htc_ep *ep;
683 struct sk_buff *skb;
684 unsigned int max_msg_size = 0;
685 int length, status;
686 unsigned long time_left;
687 bool disable_credit_flow_ctrl = false;
688 u16 message_id, service_id, flags = 0;
689 u8 tx_alloc = 0;
690
691 /* special case for HTC pseudo control service */
692 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
693 disable_credit_flow_ctrl = true;
694 assigned_eid = ATH10K_HTC_EP_0;
695 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
696 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
697 goto setup;
698 }
699
700 tx_alloc = ath10k_htc_get_credit_allocation(htc,
701 conn_req->service_id);
702 if (!tx_alloc)
703 ath10k_dbg(ar, ATH10K_DBG_BOOT,
704 "boot htc service %s does not allocate target credits\n",
705 htc_service_name(conn_req->service_id));
706
707 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
708 if (!skb) {
709 ath10k_err(ar, "Failed to allocate HTC packet\n");
710 return -ENOMEM;
711 }
712
713 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
714 skb_put(skb, length);
715 memset(skb->data, 0, length);
716
717 msg = (struct ath10k_htc_msg *)skb->data;
718 msg->hdr.message_id =
719 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
720
721 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
722
723 /* Only enable credit flow control for WMI ctrl service */
724 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
725 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
726 disable_credit_flow_ctrl = true;
727 }
728
729 req_msg = &msg->connect_service;
730 req_msg->flags = __cpu_to_le16(flags);
731 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
732
733 reinit_completion(&htc->ctl_resp);
734
735 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
736 if (status) {
737 kfree_skb(skb);
738 return status;
739 }
740
741 /* wait for response */
742 time_left = wait_for_completion_timeout(&htc->ctl_resp,
743 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
744 if (!time_left) {
745 ath10k_err(ar, "Service connect timeout\n");
746 return -ETIMEDOUT;
747 }
748
749 /* we controlled the buffer creation, it's aligned */
750 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
751 resp_msg = &msg->connect_service_response;
752 message_id = __le16_to_cpu(msg->hdr.message_id);
753 service_id = __le16_to_cpu(resp_msg->service_id);
754
755 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
756 (htc->control_resp_len < sizeof(msg->hdr) +
757 sizeof(msg->connect_service_response))) {
758 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
759 return -EPROTO;
760 }
761
762 ath10k_dbg(ar, ATH10K_DBG_HTC,
763 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
764 htc_service_name(service_id),
765 resp_msg->status, resp_msg->eid);
766
767 conn_resp->connect_resp_code = resp_msg->status;
768
769 /* check response status */
770 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
771 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
772 htc_service_name(service_id),
773 resp_msg->status);
774 return -EPROTO;
775 }
776
777 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
778 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
779
780 setup:
781
782 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
783 return -EPROTO;
784
785 if (max_msg_size == 0)
786 return -EPROTO;
787
788 ep = &htc->endpoint[assigned_eid];
789 ep->eid = assigned_eid;
790
791 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
792 return -EPROTO;
793
794 /* return assigned endpoint to caller */
795 conn_resp->eid = assigned_eid;
796 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
797
798 /* setup the endpoint */
799 ep->service_id = conn_req->service_id;
800 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
801 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
802 ep->tx_credits = tx_alloc;
803
804 /* copy all the callbacks */
805 ep->ep_ops = conn_req->ep_ops;
806
807 status = ath10k_hif_map_service_to_pipe(htc->ar,
808 ep->service_id,
809 &ep->ul_pipe_id,
810 &ep->dl_pipe_id);
811 if (status) {
812 ath10k_warn(ar, "unsupported HTC service id: %d\n",
813 ep->service_id);
814 return status;
815 }
816
817 ath10k_dbg(ar, ATH10K_DBG_BOOT,
818 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
819 htc_service_name(ep->service_id), ep->ul_pipe_id,
820 ep->dl_pipe_id, ep->eid);
821
822 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
823 ep->tx_credit_flow_enabled = false;
824 ath10k_dbg(ar, ATH10K_DBG_BOOT,
825 "boot htc service '%s' eid %d TX flow control disabled\n",
826 htc_service_name(ep->service_id), assigned_eid);
827 }
828
829 return status;
830 }
831
832 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
833 {
834 struct sk_buff *skb;
835
836 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
837 if (!skb)
838 return NULL;
839
840 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
841
842 /* FW/HTC requires 4-byte aligned streams */
843 if (!IS_ALIGNED((unsigned long)skb->data, 4))
844 ath10k_warn(ar, "Unaligned HTC tx skb\n");
845
846 return skb;
847 }
848
849 static void ath10k_htc_pktlog_process_rx(struct ath10k *ar, struct sk_buff *skb)
850 {
851 trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
852 dev_kfree_skb_any(skb);
853 }
854
855 static int ath10k_htc_pktlog_connect(struct ath10k *ar)
856 {
857 struct ath10k_htc_svc_conn_resp conn_resp;
858 struct ath10k_htc_svc_conn_req conn_req;
859 int status;
860
861 memset(&conn_req, 0, sizeof(conn_req));
862 memset(&conn_resp, 0, sizeof(conn_resp));
863
864 conn_req.ep_ops.ep_tx_complete = NULL;
865 conn_req.ep_ops.ep_rx_complete = ath10k_htc_pktlog_process_rx;
866 conn_req.ep_ops.ep_tx_credits = NULL;
867
868 /* connect to control service */
869 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_LOG_MSG;
870 status = ath10k_htc_connect_service(&ar->htc, &conn_req, &conn_resp);
871 if (status) {
872 ath10k_warn(ar, "failed to connect to PKTLOG service: %d\n",
873 status);
874 return status;
875 }
876
877 return 0;
878 }
879
880 static bool ath10k_htc_pktlog_svc_supported(struct ath10k *ar)
881 {
882 u8 ul_pipe_id;
883 u8 dl_pipe_id;
884 int status;
885
886 status = ath10k_hif_map_service_to_pipe(ar, ATH10K_HTC_SVC_ID_HTT_LOG_MSG,
887 &ul_pipe_id,
888 &dl_pipe_id);
889 if (status) {
890 ath10k_warn(ar, "unsupported HTC service id: %d\n",
891 ATH10K_HTC_SVC_ID_HTT_LOG_MSG);
892
893 return false;
894 }
895
896 return true;
897 }
898
899 int ath10k_htc_start(struct ath10k_htc *htc)
900 {
901 struct ath10k *ar = htc->ar;
902 struct sk_buff *skb;
903 int status = 0;
904 struct ath10k_htc_msg *msg;
905
906 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
907 if (!skb)
908 return -ENOMEM;
909
910 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
911 memset(skb->data, 0, skb->len);
912
913 msg = (struct ath10k_htc_msg *)skb->data;
914 msg->hdr.message_id =
915 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
916
917 if (ar->hif.bus == ATH10K_BUS_SDIO) {
918 /* Extra setup params used by SDIO */
919 msg->setup_complete_ext.flags =
920 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN);
921 msg->setup_complete_ext.max_msgs_per_bundled_recv =
922 htc->max_msgs_per_htc_bundle;
923 }
924 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
925
926 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
927 if (status) {
928 kfree_skb(skb);
929 return status;
930 }
931
932 if (ath10k_htc_pktlog_svc_supported(ar)) {
933 status = ath10k_htc_pktlog_connect(ar);
934 if (status) {
935 ath10k_err(ar, "failed to connect to pktlog: %d\n", status);
936 return status;
937 }
938 }
939
940 return 0;
941 }
942
943 /* registered target arrival callback from the HIF layer */
944 int ath10k_htc_init(struct ath10k *ar)
945 {
946 int status;
947 struct ath10k_htc *htc = &ar->htc;
948 struct ath10k_htc_svc_conn_req conn_req;
949 struct ath10k_htc_svc_conn_resp conn_resp;
950
951 spin_lock_init(&htc->tx_lock);
952
953 ath10k_htc_reset_endpoint_states(htc);
954
955 htc->ar = ar;
956
957 /* setup our pseudo HTC control endpoint connection */
958 memset(&conn_req, 0, sizeof(conn_req));
959 memset(&conn_resp, 0, sizeof(conn_resp));
960 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
961 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
962 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
963 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
964
965 /* connect fake service */
966 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
967 if (status) {
968 ath10k_err(ar, "could not connect to htc service (%d)\n",
969 status);
970 return status;
971 }
972
973 init_completion(&htc->ctl_resp);
974
975 return 0;
976 }
Linux with added FPC-III support