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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath10k / htc.c
blobedc57ab505c893c3dd295d01a3f44fd2126e3dee
1 /*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 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 inline void ath10k_htc_send_complete_check(struct ath10k_htc_ep *ep,
27 int force)
28 {
29 /*
30 * Check whether HIF has any prior sends that have finished,
31 * have not had the post-processing done.
32 */
33 ath10k_hif_send_complete_check(ep->htc->ar, ep->ul_pipe_id, force);
34 }
35
36 static void ath10k_htc_control_tx_complete(struct ath10k *ar,
37 struct sk_buff *skb)
38 {
39 kfree_skb(skb);
40 }
41
42 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
43 {
44 struct sk_buff *skb;
45 struct ath10k_skb_cb *skb_cb;
46
47 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
48 if (!skb) {
49 ath10k_warn("Unable to allocate ctrl skb\n");
50 return NULL;
51 }
52
53 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
54 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
55
56 skb_cb = ATH10K_SKB_CB(skb);
57 memset(skb_cb, 0, sizeof(*skb_cb));
58
59 ath10k_dbg(ATH10K_DBG_HTC, "%s: skb %p\n", __func__, skb);
60 return skb;
61 }
62
63 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
64 struct sk_buff *skb)
65 {
66 ath10k_skb_unmap(htc->ar->dev, skb);
67 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
68 }
69
70 static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
71 struct sk_buff *skb)
72 {
73 ath10k_dbg(ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__,
74 ep->eid, skb);
75
76 ath10k_htc_restore_tx_skb(ep->htc, skb);
77
78 if (!ep->ep_ops.ep_tx_complete) {
79 ath10k_warn("no tx handler for eid %d\n", ep->eid);
80 dev_kfree_skb_any(skb);
81 return;
82 }
83
84 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
85 }
86
87 /* assumes tx_lock is held */
88 static bool ath10k_htc_ep_need_credit_update(struct ath10k_htc_ep *ep)
89 {
90 if (!ep->tx_credit_flow_enabled)
91 return false;
92 if (ep->tx_credits >= ep->tx_credits_per_max_message)
93 return false;
94
95 ath10k_dbg(ATH10K_DBG_HTC, "HTC: endpoint %d needs credit update\n",
96 ep->eid);
97 return true;
98 }
99
100 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
101 struct sk_buff *skb)
102 {
103 struct ath10k_htc_hdr *hdr;
104
105 hdr = (struct ath10k_htc_hdr *)skb->data;
106
107 hdr->eid = ep->eid;
108 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
109 hdr->flags = 0;
110
111 spin_lock_bh(&ep->htc->tx_lock);
112 hdr->seq_no = ep->seq_no++;
113
114 if (ath10k_htc_ep_need_credit_update(ep))
115 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
116
117 spin_unlock_bh(&ep->htc->tx_lock);
118 }
119
120 int ath10k_htc_send(struct ath10k_htc *htc,
121 enum ath10k_htc_ep_id eid,
122 struct sk_buff *skb)
123 {
124 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
125 int credits = 0;
126 int ret;
127
128 if (htc->ar->state == ATH10K_STATE_WEDGED)
129 return -ECOMM;
130
131 if (eid >= ATH10K_HTC_EP_COUNT) {
132 ath10k_warn("Invalid endpoint id: %d\n", eid);
133 return -ENOENT;
134 }
135
136 /* FIXME: This looks ugly, can we fix it? */
137 spin_lock_bh(&htc->tx_lock);
138 if (htc->stopped) {
139 spin_unlock_bh(&htc->tx_lock);
140 return -ESHUTDOWN;
141 }
142 spin_unlock_bh(&htc->tx_lock);
143
144 skb_push(skb, sizeof(struct ath10k_htc_hdr));
145
146 if (ep->tx_credit_flow_enabled) {
147 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
148 spin_lock_bh(&htc->tx_lock);
149 if (ep->tx_credits < credits) {
150 spin_unlock_bh(&htc->tx_lock);
151 ret = -EAGAIN;
152 goto err_pull;
153 }
154 ep->tx_credits -= credits;
155 spin_unlock_bh(&htc->tx_lock);
156 }
157
158 ath10k_htc_prepare_tx_skb(ep, skb);
159
160 ret = ath10k_skb_map(htc->ar->dev, skb);
161 if (ret)
162 goto err_credits;
163
164 ret = ath10k_hif_send_head(htc->ar, ep->ul_pipe_id, ep->eid,
165 skb->len, skb);
166 if (ret)
167 goto err_unmap;
168
169 return 0;
170
171 err_unmap:
172 ath10k_skb_unmap(htc->ar->dev, skb);
173 err_credits:
174 if (ep->tx_credit_flow_enabled) {
175 spin_lock_bh(&htc->tx_lock);
176 ep->tx_credits += credits;
177 spin_unlock_bh(&htc->tx_lock);
178
179 if (ep->ep_ops.ep_tx_credits)
180 ep->ep_ops.ep_tx_credits(htc->ar);
181 }
182 err_pull:
183 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
184 return ret;
185 }
186
187 static int ath10k_htc_tx_completion_handler(struct ath10k *ar,
188 struct sk_buff *skb,
189 unsigned int eid)
190 {
191 struct ath10k_htc *htc = &ar->htc;
192 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
193
194 if (!skb) {
195 ath10k_warn("invalid sk_buff completion - NULL pointer. firmware crashed?\n");
196 return 0;
197 }
198
199 ath10k_htc_notify_tx_completion(ep, skb);
200 /* the skb now belongs to the completion handler */
201
202 return 0;
203 }
204
205 /***********/
206 /* Receive */
207 /***********/
208
209 static void
210 ath10k_htc_process_credit_report(struct ath10k_htc *htc,
211 const struct ath10k_htc_credit_report *report,
212 int len,
213 enum ath10k_htc_ep_id eid)
214 {
215 struct ath10k_htc_ep *ep;
216 int i, n_reports;
217
218 if (len % sizeof(*report))
219 ath10k_warn("Uneven credit report len %d", len);
220
221 n_reports = len / sizeof(*report);
222
223 spin_lock_bh(&htc->tx_lock);
224 for (i = 0; i < n_reports; i++, report++) {
225 if (report->eid >= ATH10K_HTC_EP_COUNT)
226 break;
227
228 ath10k_dbg(ATH10K_DBG_HTC, "ep %d got %d credits\n",
229 report->eid, report->credits);
230
231 ep = &htc->endpoint[report->eid];
232 ep->tx_credits += report->credits;
233
234 if (ep->ep_ops.ep_tx_credits) {
235 spin_unlock_bh(&htc->tx_lock);
236 ep->ep_ops.ep_tx_credits(htc->ar);
237 spin_lock_bh(&htc->tx_lock);
238 }
239 }
240 spin_unlock_bh(&htc->tx_lock);
241 }
242
243 static int ath10k_htc_process_trailer(struct ath10k_htc *htc,
244 u8 *buffer,
245 int length,
246 enum ath10k_htc_ep_id src_eid)
247 {
248 int status = 0;
249 struct ath10k_htc_record *record;
250 u8 *orig_buffer;
251 int orig_length;
252 size_t len;
253
254 orig_buffer = buffer;
255 orig_length = length;
256
257 while (length > 0) {
258 record = (struct ath10k_htc_record *)buffer;
259
260 if (length < sizeof(record->hdr)) {
261 status = -EINVAL;
262 break;
263 }
264
265 if (record->hdr.len > length) {
266 /* no room left in buffer for record */
267 ath10k_warn("Invalid record length: %d\n",
268 record->hdr.len);
269 status = -EINVAL;
270 break;
271 }
272
273 switch (record->hdr.id) {
274 case ATH10K_HTC_RECORD_CREDITS:
275 len = sizeof(struct ath10k_htc_credit_report);
276 if (record->hdr.len < len) {
277 ath10k_warn("Credit report too long\n");
278 status = -EINVAL;
279 break;
280 }
281 ath10k_htc_process_credit_report(htc,
282 record->credit_report,
283 record->hdr.len,
284 src_eid);
285 break;
286 default:
287 ath10k_warn("Unhandled record: id:%d length:%d\n",
288 record->hdr.id, record->hdr.len);
289 break;
290 }
291
292 if (status)
293 break;
294
295 /* multiple records may be present in a trailer */
296 buffer += sizeof(record->hdr) + record->hdr.len;
297 length -= sizeof(record->hdr) + record->hdr.len;
298 }
299
300 if (status)
301 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc rx bad trailer", "",
302 orig_buffer, orig_length);
303
304 return status;
305 }
306
307 static int ath10k_htc_rx_completion_handler(struct ath10k *ar,
308 struct sk_buff *skb,
309 u8 pipe_id)
310 {
311 int status = 0;
312 struct ath10k_htc *htc = &ar->htc;
313 struct ath10k_htc_hdr *hdr;
314 struct ath10k_htc_ep *ep;
315 u16 payload_len;
316 u32 trailer_len = 0;
317 size_t min_len;
318 u8 eid;
319 bool trailer_present;
320
321 hdr = (struct ath10k_htc_hdr *)skb->data;
322 skb_pull(skb, sizeof(*hdr));
323
324 eid = hdr->eid;
325
326 if (eid >= ATH10K_HTC_EP_COUNT) {
327 ath10k_warn("HTC Rx: invalid eid %d\n", eid);
328 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad header", "",
329 hdr, sizeof(*hdr));
330 status = -EINVAL;
331 goto out;
332 }
333
334 ep = &htc->endpoint[eid];
335
336 /*
337 * If this endpoint that received a message from the target has
338 * a to-target HIF pipe whose send completions are polled rather
339 * than interrupt-driven, this is a good point to ask HIF to check
340 * whether it has any completed sends to handle.
341 */
342 if (ep->ul_is_polled)
343 ath10k_htc_send_complete_check(ep, 1);
344
345 payload_len = __le16_to_cpu(hdr->len);
346
347 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
348 ath10k_warn("HTC rx frame too long, len: %zu\n",
349 payload_len + sizeof(*hdr));
350 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", "",
351 hdr, sizeof(*hdr));
352 status = -EINVAL;
353 goto out;
354 }
355
356 if (skb->len < payload_len) {
357 ath10k_dbg(ATH10K_DBG_HTC,
358 "HTC Rx: insufficient length, got %d, expected %d\n",
359 skb->len, payload_len);
360 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len",
361 "", hdr, sizeof(*hdr));
362 status = -EINVAL;
363 goto out;
364 }
365
366 /* get flags to check for trailer */
367 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
368 if (trailer_present) {
369 u8 *trailer;
370
371 trailer_len = hdr->trailer_len;
372 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
373
374 if ((trailer_len < min_len) ||
375 (trailer_len > payload_len)) {
376 ath10k_warn("Invalid trailer length: %d\n",
377 trailer_len);
378 status = -EPROTO;
379 goto out;
380 }
381
382 trailer = (u8 *)hdr;
383 trailer += sizeof(*hdr);
384 trailer += payload_len;
385 trailer -= trailer_len;
386 status = ath10k_htc_process_trailer(htc, trailer,
387 trailer_len, hdr->eid);
388 if (status)
389 goto out;
390
391 skb_trim(skb, skb->len - trailer_len);
392 }
393
394 if (((int)payload_len - (int)trailer_len) <= 0)
395 /* zero length packet with trailer data, just drop these */
396 goto out;
397
398 if (eid == ATH10K_HTC_EP_0) {
399 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
400
401 switch (__le16_to_cpu(msg->hdr.message_id)) {
402 default:
403 /* handle HTC control message */
404 if (completion_done(&htc->ctl_resp)) {
405 /*
406 * this is a fatal error, target should not be
407 * sending unsolicited messages on the ep 0
408 */
409 ath10k_warn("HTC rx ctrl still processing\n");
410 status = -EINVAL;
411 complete(&htc->ctl_resp);
412 goto out;
413 }
414
415 htc->control_resp_len =
416 min_t(int, skb->len,
417 ATH10K_HTC_MAX_CTRL_MSG_LEN);
418
419 memcpy(htc->control_resp_buffer, skb->data,
420 htc->control_resp_len);
421
422 complete(&htc->ctl_resp);
423 break;
424 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
425 htc->htc_ops.target_send_suspend_complete(ar);
426 }
427 goto out;
428 }
429
430 ath10k_dbg(ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n",
431 eid, skb);
432 ep->ep_ops.ep_rx_complete(ar, skb);
433
434 /* skb is now owned by the rx completion handler */
435 skb = NULL;
436 out:
437 kfree_skb(skb);
438
439 return status;
440 }
441
442 static void ath10k_htc_control_rx_complete(struct ath10k *ar,
443 struct sk_buff *skb)
444 {
445 /* This is unexpected. FW is not supposed to send regular rx on this
446 * endpoint. */
447 ath10k_warn("unexpected htc rx\n");
448 kfree_skb(skb);
449 }
450
451 /***************/
452 /* Init/Deinit */
453 /***************/
454
455 static const char *htc_service_name(enum ath10k_htc_svc_id id)
456 {
457 switch (id) {
458 case ATH10K_HTC_SVC_ID_RESERVED:
459 return "Reserved";
460 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
461 return "Control";
462 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
463 return "WMI";
464 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
465 return "DATA BE";
466 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
467 return "DATA BK";
468 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
469 return "DATA VI";
470 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
471 return "DATA VO";
472 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
473 return "NMI Control";
474 case ATH10K_HTC_SVC_ID_NMI_DATA:
475 return "NMI Data";
476 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
477 return "HTT Data";
478 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
479 return "RAW";
480 }
481
482 return "Unknown";
483 }
484
485 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
486 {
487 struct ath10k_htc_ep *ep;
488 int i;
489
490 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
491 ep = &htc->endpoint[i];
492 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
493 ep->max_ep_message_len = 0;
494 ep->max_tx_queue_depth = 0;
495 ep->eid = i;
496 ep->htc = htc;
497 ep->tx_credit_flow_enabled = true;
498 }
499 }
500
501 static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc)
502 {
503 struct ath10k_htc_svc_tx_credits *entry;
504
505 entry = &htc->service_tx_alloc[0];
506
507 /*
508 * for PCIE allocate all credists/HTC buffers to WMI.
509 * no buffers are used/required for data. data always
510 * remains on host.
511 */
512 entry++;
513 entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL;
514 entry->credit_allocation = htc->total_transmit_credits;
515 }
516
517 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
518 u16 service_id)
519 {
520 u8 allocation = 0;
521 int i;
522
523 for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) {
524 if (htc->service_tx_alloc[i].service_id == service_id)
525 allocation =
526 htc->service_tx_alloc[i].credit_allocation;
527 }
528
529 return allocation;
530 }
531
532 int ath10k_htc_wait_target(struct ath10k_htc *htc)
533 {
534 int status = 0;
535 struct ath10k_htc_svc_conn_req conn_req;
536 struct ath10k_htc_svc_conn_resp conn_resp;
537 struct ath10k_htc_msg *msg;
538 u16 message_id;
539 u16 credit_count;
540 u16 credit_size;
541
542 status = wait_for_completion_timeout(&htc->ctl_resp,
543 ATH10K_HTC_WAIT_TIMEOUT_HZ);
544 if (status <= 0) {
545 if (status == 0)
546 status = -ETIMEDOUT;
547
548 ath10k_err("ctl_resp never came in (%d)\n", status);
549 return status;
550 }
551
552 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
553 ath10k_err("Invalid HTC ready msg len:%d\n",
554 htc->control_resp_len);
555 return -ECOMM;
556 }
557
558 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
559 message_id = __le16_to_cpu(msg->hdr.message_id);
560 credit_count = __le16_to_cpu(msg->ready.credit_count);
561 credit_size = __le16_to_cpu(msg->ready.credit_size);
562
563 if (message_id != ATH10K_HTC_MSG_READY_ID) {
564 ath10k_err("Invalid HTC ready msg: 0x%x\n", message_id);
565 return -ECOMM;
566 }
567
568 htc->total_transmit_credits = credit_count;
569 htc->target_credit_size = credit_size;
570
571 ath10k_dbg(ATH10K_DBG_HTC,
572 "Target ready! transmit resources: %d size:%d\n",
573 htc->total_transmit_credits,
574 htc->target_credit_size);
575
576 if ((htc->total_transmit_credits == 0) ||
577 (htc->target_credit_size == 0)) {
578 ath10k_err("Invalid credit size received\n");
579 return -ECOMM;
580 }
581
582 ath10k_htc_setup_target_buffer_assignments(htc);
583
584 /* setup our pseudo HTC control endpoint connection */
585 memset(&conn_req, 0, sizeof(conn_req));
586 memset(&conn_resp, 0, sizeof(conn_resp));
587 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
588 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
589 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
590 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
591
592 /* connect fake service */
593 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
594 if (status) {
595 ath10k_err("could not connect to htc service (%d)\n", status);
596 return status;
597 }
598
599 return 0;
600 }
601
602 int ath10k_htc_connect_service(struct ath10k_htc *htc,
603 struct ath10k_htc_svc_conn_req *conn_req,
604 struct ath10k_htc_svc_conn_resp *conn_resp)
605 {
606 struct ath10k_htc_msg *msg;
607 struct ath10k_htc_conn_svc *req_msg;
608 struct ath10k_htc_conn_svc_response resp_msg_dummy;
609 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
610 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
611 struct ath10k_htc_ep *ep;
612 struct sk_buff *skb;
613 unsigned int max_msg_size = 0;
614 int length, status;
615 bool disable_credit_flow_ctrl = false;
616 u16 message_id, service_id, flags = 0;
617 u8 tx_alloc = 0;
618
619 /* special case for HTC pseudo control service */
620 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
621 disable_credit_flow_ctrl = true;
622 assigned_eid = ATH10K_HTC_EP_0;
623 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
624 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
625 goto setup;
626 }
627
628 tx_alloc = ath10k_htc_get_credit_allocation(htc,
629 conn_req->service_id);
630 if (!tx_alloc)
631 ath10k_dbg(ATH10K_DBG_BOOT,
632 "boot htc service %s does not allocate target credits\n",
633 htc_service_name(conn_req->service_id));
634
635 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
636 if (!skb) {
637 ath10k_err("Failed to allocate HTC packet\n");
638 return -ENOMEM;
639 }
640
641 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
642 skb_put(skb, length);
643 memset(skb->data, 0, length);
644
645 msg = (struct ath10k_htc_msg *)skb->data;
646 msg->hdr.message_id =
647 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
648
649 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
650
651 /* Only enable credit flow control for WMI ctrl service */
652 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
653 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
654 disable_credit_flow_ctrl = true;
655 }
656
657 req_msg = &msg->connect_service;
658 req_msg->flags = __cpu_to_le16(flags);
659 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
660
661 reinit_completion(&htc->ctl_resp);
662
663 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
664 if (status) {
665 kfree_skb(skb);
666 return status;
667 }
668
669 /* wait for response */
670 status = wait_for_completion_timeout(&htc->ctl_resp,
671 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
672 if (status <= 0) {
673 if (status == 0)
674 status = -ETIMEDOUT;
675 ath10k_err("Service connect timeout: %d\n", status);
676 return status;
677 }
678
679 /* we controlled the buffer creation, it's aligned */
680 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
681 resp_msg = &msg->connect_service_response;
682 message_id = __le16_to_cpu(msg->hdr.message_id);
683 service_id = __le16_to_cpu(resp_msg->service_id);
684
685 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
686 (htc->control_resp_len < sizeof(msg->hdr) +
687 sizeof(msg->connect_service_response))) {
688 ath10k_err("Invalid resp message ID 0x%x", message_id);
689 return -EPROTO;
690 }
691
692 ath10k_dbg(ATH10K_DBG_HTC,
693 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
694 htc_service_name(service_id),
695 resp_msg->status, resp_msg->eid);
696
697 conn_resp->connect_resp_code = resp_msg->status;
698
699 /* check response status */
700 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
701 ath10k_err("HTC Service %s connect request failed: 0x%x)\n",
702 htc_service_name(service_id),
703 resp_msg->status);
704 return -EPROTO;
705 }
706
707 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
708 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
709
710 setup:
711
712 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
713 return -EPROTO;
714
715 if (max_msg_size == 0)
716 return -EPROTO;
717
718 ep = &htc->endpoint[assigned_eid];
719 ep->eid = assigned_eid;
720
721 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
722 return -EPROTO;
723
724 /* return assigned endpoint to caller */
725 conn_resp->eid = assigned_eid;
726 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
727
728 /* setup the endpoint */
729 ep->service_id = conn_req->service_id;
730 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
731 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
732 ep->tx_credits = tx_alloc;
733 ep->tx_credit_size = htc->target_credit_size;
734 ep->tx_credits_per_max_message = ep->max_ep_message_len /
735 htc->target_credit_size;
736
737 if (ep->max_ep_message_len % htc->target_credit_size)
738 ep->tx_credits_per_max_message++;
739
740 /* copy all the callbacks */
741 ep->ep_ops = conn_req->ep_ops;
742
743 status = ath10k_hif_map_service_to_pipe(htc->ar,
744 ep->service_id,
745 &ep->ul_pipe_id,
746 &ep->dl_pipe_id,
747 &ep->ul_is_polled,
748 &ep->dl_is_polled);
749 if (status)
750 return status;
751
752 ath10k_dbg(ATH10K_DBG_BOOT,
753 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
754 htc_service_name(ep->service_id), ep->ul_pipe_id,
755 ep->dl_pipe_id, ep->eid);
756
757 ath10k_dbg(ATH10K_DBG_BOOT,
758 "boot htc ep %d ul polled %d dl polled %d\n",
759 ep->eid, ep->ul_is_polled, ep->dl_is_polled);
760
761 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
762 ep->tx_credit_flow_enabled = false;
763 ath10k_dbg(ATH10K_DBG_BOOT,
764 "boot htc service '%s' eid %d TX flow control disabled\n",
765 htc_service_name(ep->service_id), assigned_eid);
766 }
767
768 return status;
769 }
770
771 struct sk_buff *ath10k_htc_alloc_skb(int size)
772 {
773 struct sk_buff *skb;
774
775 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
776 if (!skb) {
777 ath10k_warn("could not allocate HTC tx skb\n");
778 return NULL;
779 }
780
781 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
782
783 /* FW/HTC requires 4-byte aligned streams */
784 if (!IS_ALIGNED((unsigned long)skb->data, 4))
785 ath10k_warn("Unaligned HTC tx skb\n");
786
787 return skb;
788 }
789
790 int ath10k_htc_start(struct ath10k_htc *htc)
791 {
792 struct sk_buff *skb;
793 int status = 0;
794 struct ath10k_htc_msg *msg;
795
796 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
797 if (!skb)
798 return -ENOMEM;
799
800 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
801 memset(skb->data, 0, skb->len);
802
803 msg = (struct ath10k_htc_msg *)skb->data;
804 msg->hdr.message_id =
805 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
806
807 ath10k_dbg(ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
808
809 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
810 if (status) {
811 kfree_skb(skb);
812 return status;
813 }
814
815 return 0;
816 }
817
818 /*
819 * stop HTC communications, i.e. stop interrupt reception, and flush all
820 * queued buffers
821 */
822 void ath10k_htc_stop(struct ath10k_htc *htc)
823 {
824 spin_lock_bh(&htc->tx_lock);
825 htc->stopped = true;
826 spin_unlock_bh(&htc->tx_lock);
827
828 ath10k_hif_stop(htc->ar);
829 }
830
831 /* registered target arrival callback from the HIF layer */
832 int ath10k_htc_init(struct ath10k *ar)
833 {
834 struct ath10k_hif_cb htc_callbacks;
835 struct ath10k_htc_ep *ep = NULL;
836 struct ath10k_htc *htc = &ar->htc;
837
838 spin_lock_init(&htc->tx_lock);
839
840 htc->stopped = false;
841 ath10k_htc_reset_endpoint_states(htc);
842
843 /* setup HIF layer callbacks */
844 htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler;
845 htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler;
846 htc->ar = ar;
847
848 /* Get HIF default pipe for HTC message exchange */
849 ep = &htc->endpoint[ATH10K_HTC_EP_0];
850
851 ath10k_hif_set_callbacks(ar, &htc_callbacks);
852 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id);
853
854 init_completion(&htc->ctl_resp);
855
856 return 0;
857 }
Linux with added FPC-III support