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5e3dd157 KV |
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 | memset(hdr, 0, sizeof(*hdr)); | |
107 | ||
108 | hdr->eid = ep->eid; | |
109 | hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); | |
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 | static int ath10k_htc_issue_skb(struct ath10k_htc *htc, | |
121 | struct ath10k_htc_ep *ep, | |
122 | struct sk_buff *skb, | |
123 | u8 credits) | |
124 | { | |
125 | struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); | |
126 | int ret; | |
127 | ||
128 | ath10k_dbg(ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__, | |
129 | ep->eid, skb); | |
130 | ||
131 | ath10k_htc_prepare_tx_skb(ep, skb); | |
132 | ||
133 | ret = ath10k_skb_map(htc->ar->dev, skb); | |
134 | if (ret) | |
135 | goto err; | |
136 | ||
137 | ret = ath10k_hif_send_head(htc->ar, | |
138 | ep->ul_pipe_id, | |
139 | ep->eid, | |
140 | skb->len, | |
141 | skb); | |
142 | if (unlikely(ret)) | |
143 | goto err; | |
144 | ||
145 | return 0; | |
146 | err: | |
147 | ath10k_warn("HTC issue failed: %d\n", ret); | |
148 | ||
149 | spin_lock_bh(&htc->tx_lock); | |
150 | ep->tx_credits += credits; | |
151 | spin_unlock_bh(&htc->tx_lock); | |
152 | ||
153 | /* this is the simplest way to handle out-of-resources for non-credit | |
154 | * based endpoints. credit based endpoints can still get -ENOSR, but | |
155 | * this is highly unlikely as credit reservation should prevent that */ | |
156 | if (ret == -ENOSR) { | |
157 | spin_lock_bh(&htc->tx_lock); | |
158 | __skb_queue_head(&ep->tx_queue, skb); | |
159 | spin_unlock_bh(&htc->tx_lock); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
164 | skb_cb->is_aborted = true; | |
165 | ath10k_htc_notify_tx_completion(ep, skb); | |
166 | ||
167 | return ret; | |
168 | } | |
169 | ||
170 | static struct sk_buff *ath10k_htc_get_skb_credit_based(struct ath10k_htc *htc, | |
171 | struct ath10k_htc_ep *ep, | |
172 | u8 *credits) | |
173 | { | |
174 | struct sk_buff *skb; | |
175 | struct ath10k_skb_cb *skb_cb; | |
176 | int credits_required; | |
177 | int remainder; | |
178 | unsigned int transfer_len; | |
179 | ||
180 | lockdep_assert_held(&htc->tx_lock); | |
181 | ||
182 | skb = __skb_dequeue(&ep->tx_queue); | |
183 | if (!skb) | |
184 | return NULL; | |
185 | ||
186 | skb_cb = ATH10K_SKB_CB(skb); | |
187 | transfer_len = skb->len; | |
188 | ||
189 | if (likely(transfer_len <= htc->target_credit_size)) { | |
190 | credits_required = 1; | |
191 | } else { | |
192 | /* figure out how many credits this message requires */ | |
193 | credits_required = transfer_len / htc->target_credit_size; | |
194 | remainder = transfer_len % htc->target_credit_size; | |
195 | ||
196 | if (remainder) | |
197 | credits_required++; | |
198 | } | |
199 | ||
200 | ath10k_dbg(ATH10K_DBG_HTC, "Credits required %d got %d\n", | |
201 | credits_required, ep->tx_credits); | |
202 | ||
203 | if (ep->tx_credits < credits_required) { | |
204 | __skb_queue_head(&ep->tx_queue, skb); | |
205 | return NULL; | |
206 | } | |
207 | ||
208 | ep->tx_credits -= credits_required; | |
209 | *credits = credits_required; | |
210 | return skb; | |
211 | } | |
212 | ||
213 | static void ath10k_htc_send_work(struct work_struct *work) | |
214 | { | |
215 | struct ath10k_htc_ep *ep = container_of(work, | |
216 | struct ath10k_htc_ep, send_work); | |
217 | struct ath10k_htc *htc = ep->htc; | |
218 | struct sk_buff *skb; | |
219 | u8 credits = 0; | |
220 | int ret; | |
221 | ||
222 | while (true) { | |
223 | if (ep->ul_is_polled) | |
224 | ath10k_htc_send_complete_check(ep, 0); | |
225 | ||
226 | spin_lock_bh(&htc->tx_lock); | |
227 | if (ep->tx_credit_flow_enabled) | |
228 | skb = ath10k_htc_get_skb_credit_based(htc, ep, | |
229 | &credits); | |
230 | else | |
231 | skb = __skb_dequeue(&ep->tx_queue); | |
232 | spin_unlock_bh(&htc->tx_lock); | |
233 | ||
234 | if (!skb) | |
235 | break; | |
236 | ||
237 | ret = ath10k_htc_issue_skb(htc, ep, skb, credits); | |
238 | if (ret == -ENOSR) | |
239 | break; | |
240 | } | |
241 | } | |
242 | ||
243 | int ath10k_htc_send(struct ath10k_htc *htc, | |
244 | enum ath10k_htc_ep_id eid, | |
245 | struct sk_buff *skb) | |
246 | { | |
247 | struct ath10k_htc_ep *ep = &htc->endpoint[eid]; | |
248 | ||
affd3217 MK |
249 | if (htc->ar->state == ATH10K_STATE_WEDGED) |
250 | return -ECOMM; | |
251 | ||
5e3dd157 KV |
252 | if (eid >= ATH10K_HTC_EP_COUNT) { |
253 | ath10k_warn("Invalid endpoint id: %d\n", eid); | |
254 | return -ENOENT; | |
255 | } | |
256 | ||
5e3dd157 | 257 | spin_lock_bh(&htc->tx_lock); |
08fe9b40 MK |
258 | if (htc->stopped) { |
259 | spin_unlock_bh(&htc->tx_lock); | |
260 | return -ESHUTDOWN; | |
261 | } | |
262 | ||
5e3dd157 | 263 | __skb_queue_tail(&ep->tx_queue, skb); |
08fe9b40 | 264 | skb_push(skb, sizeof(struct ath10k_htc_hdr)); |
5e3dd157 KV |
265 | spin_unlock_bh(&htc->tx_lock); |
266 | ||
267 | queue_work(htc->ar->workqueue, &ep->send_work); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int ath10k_htc_tx_completion_handler(struct ath10k *ar, | |
272 | struct sk_buff *skb, | |
273 | unsigned int eid) | |
274 | { | |
cd003fad | 275 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 | 276 | struct ath10k_htc_ep *ep = &htc->endpoint[eid]; |
5e3dd157 KV |
277 | |
278 | ath10k_htc_notify_tx_completion(ep, skb); | |
279 | /* the skb now belongs to the completion handler */ | |
280 | ||
08fe9b40 MK |
281 | /* note: when using TX credit flow, the re-checking of queues happens |
282 | * when credits flow back from the target. in the non-TX credit case, | |
283 | * we recheck after the packet completes */ | |
5e3dd157 | 284 | spin_lock_bh(&htc->tx_lock); |
08fe9b40 | 285 | if (!ep->tx_credit_flow_enabled && !htc->stopped) |
5e3dd157 | 286 | queue_work(ar->workqueue, &ep->send_work); |
08fe9b40 | 287 | spin_unlock_bh(&htc->tx_lock); |
5e3dd157 KV |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* flush endpoint TX queue */ | |
293 | static void ath10k_htc_flush_endpoint_tx(struct ath10k_htc *htc, | |
294 | struct ath10k_htc_ep *ep) | |
295 | { | |
296 | struct sk_buff *skb; | |
297 | struct ath10k_skb_cb *skb_cb; | |
298 | ||
299 | spin_lock_bh(&htc->tx_lock); | |
300 | for (;;) { | |
301 | skb = __skb_dequeue(&ep->tx_queue); | |
302 | if (!skb) | |
303 | break; | |
304 | ||
305 | skb_cb = ATH10K_SKB_CB(skb); | |
306 | skb_cb->is_aborted = true; | |
307 | ath10k_htc_notify_tx_completion(ep, skb); | |
308 | } | |
309 | spin_unlock_bh(&htc->tx_lock); | |
310 | ||
311 | cancel_work_sync(&ep->send_work); | |
312 | } | |
313 | ||
314 | /***********/ | |
315 | /* Receive */ | |
316 | /***********/ | |
317 | ||
318 | static void | |
319 | ath10k_htc_process_credit_report(struct ath10k_htc *htc, | |
320 | const struct ath10k_htc_credit_report *report, | |
321 | int len, | |
322 | enum ath10k_htc_ep_id eid) | |
323 | { | |
324 | struct ath10k_htc_ep *ep; | |
325 | int i, n_reports; | |
326 | ||
327 | if (len % sizeof(*report)) | |
328 | ath10k_warn("Uneven credit report len %d", len); | |
329 | ||
330 | n_reports = len / sizeof(*report); | |
331 | ||
332 | spin_lock_bh(&htc->tx_lock); | |
333 | for (i = 0; i < n_reports; i++, report++) { | |
334 | if (report->eid >= ATH10K_HTC_EP_COUNT) | |
335 | break; | |
336 | ||
337 | ath10k_dbg(ATH10K_DBG_HTC, "ep %d got %d credits\n", | |
338 | report->eid, report->credits); | |
339 | ||
340 | ep = &htc->endpoint[report->eid]; | |
341 | ep->tx_credits += report->credits; | |
342 | ||
343 | if (ep->tx_credits && !skb_queue_empty(&ep->tx_queue)) | |
344 | queue_work(htc->ar->workqueue, &ep->send_work); | |
345 | } | |
346 | spin_unlock_bh(&htc->tx_lock); | |
347 | } | |
348 | ||
349 | static int ath10k_htc_process_trailer(struct ath10k_htc *htc, | |
350 | u8 *buffer, | |
351 | int length, | |
352 | enum ath10k_htc_ep_id src_eid) | |
353 | { | |
354 | int status = 0; | |
355 | struct ath10k_htc_record *record; | |
356 | u8 *orig_buffer; | |
357 | int orig_length; | |
358 | size_t len; | |
359 | ||
360 | orig_buffer = buffer; | |
361 | orig_length = length; | |
362 | ||
363 | while (length > 0) { | |
364 | record = (struct ath10k_htc_record *)buffer; | |
365 | ||
366 | if (length < sizeof(record->hdr)) { | |
367 | status = -EINVAL; | |
368 | break; | |
369 | } | |
370 | ||
371 | if (record->hdr.len > length) { | |
372 | /* no room left in buffer for record */ | |
373 | ath10k_warn("Invalid record length: %d\n", | |
374 | record->hdr.len); | |
375 | status = -EINVAL; | |
376 | break; | |
377 | } | |
378 | ||
379 | switch (record->hdr.id) { | |
380 | case ATH10K_HTC_RECORD_CREDITS: | |
381 | len = sizeof(struct ath10k_htc_credit_report); | |
382 | if (record->hdr.len < len) { | |
383 | ath10k_warn("Credit report too long\n"); | |
384 | status = -EINVAL; | |
385 | break; | |
386 | } | |
387 | ath10k_htc_process_credit_report(htc, | |
388 | record->credit_report, | |
389 | record->hdr.len, | |
390 | src_eid); | |
391 | break; | |
392 | default: | |
393 | ath10k_warn("Unhandled record: id:%d length:%d\n", | |
394 | record->hdr.id, record->hdr.len); | |
395 | break; | |
396 | } | |
397 | ||
398 | if (status) | |
399 | break; | |
400 | ||
401 | /* multiple records may be present in a trailer */ | |
402 | buffer += sizeof(record->hdr) + record->hdr.len; | |
403 | length -= sizeof(record->hdr) + record->hdr.len; | |
404 | } | |
405 | ||
406 | if (status) | |
407 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc rx bad trailer", "", | |
408 | orig_buffer, orig_length); | |
409 | ||
410 | return status; | |
411 | } | |
412 | ||
413 | static int ath10k_htc_rx_completion_handler(struct ath10k *ar, | |
414 | struct sk_buff *skb, | |
415 | u8 pipe_id) | |
416 | { | |
417 | int status = 0; | |
cd003fad | 418 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
419 | struct ath10k_htc_hdr *hdr; |
420 | struct ath10k_htc_ep *ep; | |
421 | u16 payload_len; | |
422 | u32 trailer_len = 0; | |
423 | size_t min_len; | |
424 | u8 eid; | |
425 | bool trailer_present; | |
426 | ||
427 | hdr = (struct ath10k_htc_hdr *)skb->data; | |
428 | skb_pull(skb, sizeof(*hdr)); | |
429 | ||
430 | eid = hdr->eid; | |
431 | ||
432 | if (eid >= ATH10K_HTC_EP_COUNT) { | |
433 | ath10k_warn("HTC Rx: invalid eid %d\n", eid); | |
434 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad header", "", | |
435 | hdr, sizeof(*hdr)); | |
436 | status = -EINVAL; | |
437 | goto out; | |
438 | } | |
439 | ||
440 | ep = &htc->endpoint[eid]; | |
441 | ||
442 | /* | |
443 | * If this endpoint that received a message from the target has | |
444 | * a to-target HIF pipe whose send completions are polled rather | |
445 | * than interrupt-driven, this is a good point to ask HIF to check | |
446 | * whether it has any completed sends to handle. | |
447 | */ | |
448 | if (ep->ul_is_polled) | |
449 | ath10k_htc_send_complete_check(ep, 1); | |
450 | ||
451 | payload_len = __le16_to_cpu(hdr->len); | |
452 | ||
453 | if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { | |
454 | ath10k_warn("HTC rx frame too long, len: %zu\n", | |
455 | payload_len + sizeof(*hdr)); | |
456 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", "", | |
457 | hdr, sizeof(*hdr)); | |
458 | status = -EINVAL; | |
459 | goto out; | |
460 | } | |
461 | ||
462 | if (skb->len < payload_len) { | |
463 | ath10k_dbg(ATH10K_DBG_HTC, | |
464 | "HTC Rx: insufficient length, got %d, expected %d\n", | |
465 | skb->len, payload_len); | |
466 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", | |
467 | "", hdr, sizeof(*hdr)); | |
468 | status = -EINVAL; | |
469 | goto out; | |
470 | } | |
471 | ||
472 | /* get flags to check for trailer */ | |
473 | trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; | |
474 | if (trailer_present) { | |
475 | u8 *trailer; | |
476 | ||
477 | trailer_len = hdr->trailer_len; | |
478 | min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); | |
479 | ||
480 | if ((trailer_len < min_len) || | |
481 | (trailer_len > payload_len)) { | |
482 | ath10k_warn("Invalid trailer length: %d\n", | |
483 | trailer_len); | |
484 | status = -EPROTO; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | trailer = (u8 *)hdr; | |
489 | trailer += sizeof(*hdr); | |
490 | trailer += payload_len; | |
491 | trailer -= trailer_len; | |
492 | status = ath10k_htc_process_trailer(htc, trailer, | |
493 | trailer_len, hdr->eid); | |
494 | if (status) | |
495 | goto out; | |
496 | ||
497 | skb_trim(skb, skb->len - trailer_len); | |
498 | } | |
499 | ||
500 | if (((int)payload_len - (int)trailer_len) <= 0) | |
501 | /* zero length packet with trailer data, just drop these */ | |
502 | goto out; | |
503 | ||
504 | if (eid == ATH10K_HTC_EP_0) { | |
505 | struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; | |
506 | ||
507 | switch (__le16_to_cpu(msg->hdr.message_id)) { | |
508 | default: | |
509 | /* handle HTC control message */ | |
510 | if (completion_done(&htc->ctl_resp)) { | |
511 | /* | |
512 | * this is a fatal error, target should not be | |
513 | * sending unsolicited messages on the ep 0 | |
514 | */ | |
515 | ath10k_warn("HTC rx ctrl still processing\n"); | |
516 | status = -EINVAL; | |
517 | complete(&htc->ctl_resp); | |
518 | goto out; | |
519 | } | |
520 | ||
521 | htc->control_resp_len = | |
522 | min_t(int, skb->len, | |
523 | ATH10K_HTC_MAX_CTRL_MSG_LEN); | |
524 | ||
525 | memcpy(htc->control_resp_buffer, skb->data, | |
526 | htc->control_resp_len); | |
527 | ||
528 | complete(&htc->ctl_resp); | |
529 | break; | |
530 | case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: | |
531 | htc->htc_ops.target_send_suspend_complete(ar); | |
532 | } | |
533 | goto out; | |
534 | } | |
535 | ||
536 | ath10k_dbg(ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n", | |
537 | eid, skb); | |
538 | ep->ep_ops.ep_rx_complete(ar, skb); | |
539 | ||
540 | /* skb is now owned by the rx completion handler */ | |
541 | skb = NULL; | |
542 | out: | |
543 | kfree_skb(skb); | |
544 | ||
545 | return status; | |
546 | } | |
547 | ||
548 | static void ath10k_htc_control_rx_complete(struct ath10k *ar, | |
549 | struct sk_buff *skb) | |
550 | { | |
551 | /* This is unexpected. FW is not supposed to send regular rx on this | |
552 | * endpoint. */ | |
553 | ath10k_warn("unexpected htc rx\n"); | |
554 | kfree_skb(skb); | |
555 | } | |
556 | ||
557 | /***************/ | |
558 | /* Init/Deinit */ | |
559 | /***************/ | |
560 | ||
561 | static const char *htc_service_name(enum ath10k_htc_svc_id id) | |
562 | { | |
563 | switch (id) { | |
564 | case ATH10K_HTC_SVC_ID_RESERVED: | |
565 | return "Reserved"; | |
566 | case ATH10K_HTC_SVC_ID_RSVD_CTRL: | |
567 | return "Control"; | |
568 | case ATH10K_HTC_SVC_ID_WMI_CONTROL: | |
569 | return "WMI"; | |
570 | case ATH10K_HTC_SVC_ID_WMI_DATA_BE: | |
571 | return "DATA BE"; | |
572 | case ATH10K_HTC_SVC_ID_WMI_DATA_BK: | |
573 | return "DATA BK"; | |
574 | case ATH10K_HTC_SVC_ID_WMI_DATA_VI: | |
575 | return "DATA VI"; | |
576 | case ATH10K_HTC_SVC_ID_WMI_DATA_VO: | |
577 | return "DATA VO"; | |
578 | case ATH10K_HTC_SVC_ID_NMI_CONTROL: | |
579 | return "NMI Control"; | |
580 | case ATH10K_HTC_SVC_ID_NMI_DATA: | |
581 | return "NMI Data"; | |
582 | case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: | |
583 | return "HTT Data"; | |
584 | case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: | |
585 | return "RAW"; | |
586 | } | |
587 | ||
588 | return "Unknown"; | |
589 | } | |
590 | ||
591 | static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) | |
592 | { | |
593 | struct ath10k_htc_ep *ep; | |
594 | int i; | |
595 | ||
596 | for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { | |
597 | ep = &htc->endpoint[i]; | |
598 | ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; | |
599 | ep->max_ep_message_len = 0; | |
600 | ep->max_tx_queue_depth = 0; | |
601 | ep->eid = i; | |
602 | skb_queue_head_init(&ep->tx_queue); | |
603 | ep->htc = htc; | |
604 | ep->tx_credit_flow_enabled = true; | |
605 | INIT_WORK(&ep->send_work, ath10k_htc_send_work); | |
606 | } | |
607 | } | |
608 | ||
609 | static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) | |
610 | { | |
611 | struct ath10k_htc_svc_tx_credits *entry; | |
612 | ||
613 | entry = &htc->service_tx_alloc[0]; | |
614 | ||
615 | /* | |
616 | * for PCIE allocate all credists/HTC buffers to WMI. | |
617 | * no buffers are used/required for data. data always | |
618 | * remains on host. | |
619 | */ | |
620 | entry++; | |
621 | entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; | |
622 | entry->credit_allocation = htc->total_transmit_credits; | |
623 | } | |
624 | ||
625 | static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, | |
626 | u16 service_id) | |
627 | { | |
628 | u8 allocation = 0; | |
629 | int i; | |
630 | ||
631 | for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { | |
632 | if (htc->service_tx_alloc[i].service_id == service_id) | |
633 | allocation = | |
634 | htc->service_tx_alloc[i].credit_allocation; | |
635 | } | |
636 | ||
637 | return allocation; | |
638 | } | |
639 | ||
640 | int ath10k_htc_wait_target(struct ath10k_htc *htc) | |
641 | { | |
642 | int status = 0; | |
643 | struct ath10k_htc_svc_conn_req conn_req; | |
644 | struct ath10k_htc_svc_conn_resp conn_resp; | |
645 | struct ath10k_htc_msg *msg; | |
646 | u16 message_id; | |
647 | u16 credit_count; | |
648 | u16 credit_size; | |
649 | ||
650 | INIT_COMPLETION(htc->ctl_resp); | |
651 | ||
652 | status = ath10k_hif_start(htc->ar); | |
653 | if (status) { | |
654 | ath10k_err("could not start HIF (%d)\n", status); | |
655 | goto err_start; | |
656 | } | |
657 | ||
658 | status = wait_for_completion_timeout(&htc->ctl_resp, | |
659 | ATH10K_HTC_WAIT_TIMEOUT_HZ); | |
660 | if (status <= 0) { | |
661 | if (status == 0) | |
662 | status = -ETIMEDOUT; | |
663 | ||
664 | ath10k_err("ctl_resp never came in (%d)\n", status); | |
665 | goto err_target; | |
666 | } | |
667 | ||
668 | if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { | |
669 | ath10k_err("Invalid HTC ready msg len:%d\n", | |
670 | htc->control_resp_len); | |
671 | ||
672 | status = -ECOMM; | |
673 | goto err_target; | |
674 | } | |
675 | ||
676 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
677 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
678 | credit_count = __le16_to_cpu(msg->ready.credit_count); | |
679 | credit_size = __le16_to_cpu(msg->ready.credit_size); | |
680 | ||
681 | if (message_id != ATH10K_HTC_MSG_READY_ID) { | |
682 | ath10k_err("Invalid HTC ready msg: 0x%x\n", message_id); | |
683 | status = -ECOMM; | |
684 | goto err_target; | |
685 | } | |
686 | ||
687 | htc->total_transmit_credits = credit_count; | |
688 | htc->target_credit_size = credit_size; | |
689 | ||
690 | ath10k_dbg(ATH10K_DBG_HTC, | |
691 | "Target ready! transmit resources: %d size:%d\n", | |
692 | htc->total_transmit_credits, | |
693 | htc->target_credit_size); | |
694 | ||
695 | if ((htc->total_transmit_credits == 0) || | |
696 | (htc->target_credit_size == 0)) { | |
697 | status = -ECOMM; | |
698 | ath10k_err("Invalid credit size received\n"); | |
699 | goto err_target; | |
700 | } | |
701 | ||
702 | ath10k_htc_setup_target_buffer_assignments(htc); | |
703 | ||
704 | /* setup our pseudo HTC control endpoint connection */ | |
705 | memset(&conn_req, 0, sizeof(conn_req)); | |
706 | memset(&conn_resp, 0, sizeof(conn_resp)); | |
707 | conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; | |
708 | conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; | |
709 | conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; | |
710 | conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; | |
711 | ||
712 | /* connect fake service */ | |
713 | status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); | |
714 | if (status) { | |
715 | ath10k_err("could not connect to htc service (%d)\n", status); | |
716 | goto err_target; | |
717 | } | |
718 | ||
719 | return 0; | |
720 | err_target: | |
721 | ath10k_hif_stop(htc->ar); | |
722 | err_start: | |
723 | return status; | |
724 | } | |
725 | ||
726 | int ath10k_htc_connect_service(struct ath10k_htc *htc, | |
727 | struct ath10k_htc_svc_conn_req *conn_req, | |
728 | struct ath10k_htc_svc_conn_resp *conn_resp) | |
729 | { | |
730 | struct ath10k_htc_msg *msg; | |
731 | struct ath10k_htc_conn_svc *req_msg; | |
732 | struct ath10k_htc_conn_svc_response resp_msg_dummy; | |
733 | struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; | |
734 | enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; | |
735 | struct ath10k_htc_ep *ep; | |
736 | struct sk_buff *skb; | |
737 | unsigned int max_msg_size = 0; | |
738 | int length, status; | |
739 | bool disable_credit_flow_ctrl = false; | |
740 | u16 message_id, service_id, flags = 0; | |
741 | u8 tx_alloc = 0; | |
742 | ||
743 | /* special case for HTC pseudo control service */ | |
744 | if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { | |
745 | disable_credit_flow_ctrl = true; | |
746 | assigned_eid = ATH10K_HTC_EP_0; | |
747 | max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; | |
748 | memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); | |
749 | goto setup; | |
750 | } | |
751 | ||
752 | tx_alloc = ath10k_htc_get_credit_allocation(htc, | |
753 | conn_req->service_id); | |
754 | if (!tx_alloc) | |
342004be MK |
755 | ath10k_dbg(ATH10K_DBG_HTC, |
756 | "HTC Service %s does not allocate target credits\n", | |
757 | htc_service_name(conn_req->service_id)); | |
5e3dd157 KV |
758 | |
759 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
760 | if (!skb) { | |
761 | ath10k_err("Failed to allocate HTC packet\n"); | |
762 | return -ENOMEM; | |
763 | } | |
764 | ||
765 | length = sizeof(msg->hdr) + sizeof(msg->connect_service); | |
766 | skb_put(skb, length); | |
767 | memset(skb->data, 0, length); | |
768 | ||
769 | msg = (struct ath10k_htc_msg *)skb->data; | |
770 | msg->hdr.message_id = | |
771 | __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); | |
772 | ||
773 | flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); | |
774 | ||
775 | req_msg = &msg->connect_service; | |
776 | req_msg->flags = __cpu_to_le16(flags); | |
777 | req_msg->service_id = __cpu_to_le16(conn_req->service_id); | |
778 | ||
779 | /* Only enable credit flow control for WMI ctrl service */ | |
780 | if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { | |
781 | flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; | |
782 | disable_credit_flow_ctrl = true; | |
783 | } | |
784 | ||
785 | INIT_COMPLETION(htc->ctl_resp); | |
786 | ||
787 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
788 | if (status) { | |
789 | kfree_skb(skb); | |
790 | return status; | |
791 | } | |
792 | ||
793 | /* wait for response */ | |
794 | status = wait_for_completion_timeout(&htc->ctl_resp, | |
795 | ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); | |
796 | if (status <= 0) { | |
797 | if (status == 0) | |
798 | status = -ETIMEDOUT; | |
799 | ath10k_err("Service connect timeout: %d\n", status); | |
800 | return status; | |
801 | } | |
802 | ||
803 | /* we controlled the buffer creation, it's aligned */ | |
804 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
805 | resp_msg = &msg->connect_service_response; | |
806 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
807 | service_id = __le16_to_cpu(resp_msg->service_id); | |
808 | ||
809 | if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || | |
810 | (htc->control_resp_len < sizeof(msg->hdr) + | |
811 | sizeof(msg->connect_service_response))) { | |
812 | ath10k_err("Invalid resp message ID 0x%x", message_id); | |
813 | return -EPROTO; | |
814 | } | |
815 | ||
816 | ath10k_dbg(ATH10K_DBG_HTC, | |
817 | "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", | |
818 | htc_service_name(service_id), | |
819 | resp_msg->status, resp_msg->eid); | |
820 | ||
821 | conn_resp->connect_resp_code = resp_msg->status; | |
822 | ||
823 | /* check response status */ | |
824 | if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { | |
825 | ath10k_err("HTC Service %s connect request failed: 0x%x)\n", | |
826 | htc_service_name(service_id), | |
827 | resp_msg->status); | |
828 | return -EPROTO; | |
829 | } | |
830 | ||
831 | assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; | |
832 | max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); | |
833 | ||
834 | setup: | |
835 | ||
836 | if (assigned_eid >= ATH10K_HTC_EP_COUNT) | |
837 | return -EPROTO; | |
838 | ||
839 | if (max_msg_size == 0) | |
840 | return -EPROTO; | |
841 | ||
842 | ep = &htc->endpoint[assigned_eid]; | |
843 | ep->eid = assigned_eid; | |
844 | ||
845 | if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) | |
846 | return -EPROTO; | |
847 | ||
848 | /* return assigned endpoint to caller */ | |
849 | conn_resp->eid = assigned_eid; | |
850 | conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); | |
851 | ||
852 | /* setup the endpoint */ | |
853 | ep->service_id = conn_req->service_id; | |
854 | ep->max_tx_queue_depth = conn_req->max_send_queue_depth; | |
855 | ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); | |
856 | ep->tx_credits = tx_alloc; | |
857 | ep->tx_credit_size = htc->target_credit_size; | |
858 | ep->tx_credits_per_max_message = ep->max_ep_message_len / | |
859 | htc->target_credit_size; | |
860 | ||
861 | if (ep->max_ep_message_len % htc->target_credit_size) | |
862 | ep->tx_credits_per_max_message++; | |
863 | ||
864 | /* copy all the callbacks */ | |
865 | ep->ep_ops = conn_req->ep_ops; | |
866 | ||
867 | status = ath10k_hif_map_service_to_pipe(htc->ar, | |
868 | ep->service_id, | |
869 | &ep->ul_pipe_id, | |
870 | &ep->dl_pipe_id, | |
871 | &ep->ul_is_polled, | |
872 | &ep->dl_is_polled); | |
873 | if (status) | |
874 | return status; | |
875 | ||
876 | ath10k_dbg(ATH10K_DBG_HTC, | |
877 | "HTC service: %s UL pipe: %d DL pipe: %d eid: %d ready\n", | |
878 | htc_service_name(ep->service_id), ep->ul_pipe_id, | |
879 | ep->dl_pipe_id, ep->eid); | |
880 | ||
881 | ath10k_dbg(ATH10K_DBG_HTC, | |
882 | "EP %d UL polled: %d, DL polled: %d\n", | |
883 | ep->eid, ep->ul_is_polled, ep->dl_is_polled); | |
884 | ||
885 | if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { | |
886 | ep->tx_credit_flow_enabled = false; | |
887 | ath10k_dbg(ATH10K_DBG_HTC, | |
888 | "HTC service: %s eid: %d TX flow control disabled\n", | |
889 | htc_service_name(ep->service_id), assigned_eid); | |
890 | } | |
891 | ||
892 | return status; | |
893 | } | |
894 | ||
895 | struct sk_buff *ath10k_htc_alloc_skb(int size) | |
896 | { | |
897 | struct sk_buff *skb; | |
898 | ||
899 | skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); | |
900 | if (!skb) { | |
901 | ath10k_warn("could not allocate HTC tx skb\n"); | |
902 | return NULL; | |
903 | } | |
904 | ||
905 | skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); | |
906 | ||
907 | /* FW/HTC requires 4-byte aligned streams */ | |
908 | if (!IS_ALIGNED((unsigned long)skb->data, 4)) | |
909 | ath10k_warn("Unaligned HTC tx skb\n"); | |
910 | ||
911 | return skb; | |
912 | } | |
913 | ||
914 | int ath10k_htc_start(struct ath10k_htc *htc) | |
915 | { | |
916 | struct sk_buff *skb; | |
917 | int status = 0; | |
918 | struct ath10k_htc_msg *msg; | |
919 | ||
920 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
921 | if (!skb) | |
922 | return -ENOMEM; | |
923 | ||
924 | skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); | |
925 | memset(skb->data, 0, skb->len); | |
926 | ||
927 | msg = (struct ath10k_htc_msg *)skb->data; | |
928 | msg->hdr.message_id = | |
929 | __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); | |
930 | ||
931 | ath10k_dbg(ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); | |
932 | ||
933 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
934 | if (status) { | |
935 | kfree_skb(skb); | |
936 | return status; | |
937 | } | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
942 | /* | |
943 | * stop HTC communications, i.e. stop interrupt reception, and flush all | |
944 | * queued buffers | |
945 | */ | |
946 | void ath10k_htc_stop(struct ath10k_htc *htc) | |
947 | { | |
948 | int i; | |
949 | struct ath10k_htc_ep *ep; | |
950 | ||
951 | spin_lock_bh(&htc->tx_lock); | |
08fe9b40 | 952 | htc->stopped = true; |
5e3dd157 KV |
953 | spin_unlock_bh(&htc->tx_lock); |
954 | ||
955 | for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { | |
956 | ep = &htc->endpoint[i]; | |
957 | ath10k_htc_flush_endpoint_tx(htc, ep); | |
958 | } | |
959 | ||
960 | ath10k_hif_stop(htc->ar); | |
5e3dd157 KV |
961 | } |
962 | ||
963 | /* registered target arrival callback from the HIF layer */ | |
cd003fad | 964 | int ath10k_htc_init(struct ath10k *ar) |
5e3dd157 KV |
965 | { |
966 | struct ath10k_hif_cb htc_callbacks; | |
967 | struct ath10k_htc_ep *ep = NULL; | |
cd003fad | 968 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
969 | |
970 | spin_lock_init(&htc->tx_lock); | |
971 | ||
08fe9b40 | 972 | htc->stopped = false; |
5e3dd157 KV |
973 | ath10k_htc_reset_endpoint_states(htc); |
974 | ||
975 | /* setup HIF layer callbacks */ | |
976 | htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler; | |
977 | htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler; | |
978 | htc->ar = ar; | |
979 | ||
980 | /* Get HIF default pipe for HTC message exchange */ | |
981 | ep = &htc->endpoint[ATH10K_HTC_EP_0]; | |
982 | ||
e799bbff | 983 | ath10k_hif_set_callbacks(ar, &htc_callbacks); |
5e3dd157 KV |
984 | ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); |
985 | ||
986 | init_completion(&htc->ctl_resp); | |
987 | ||
cd003fad | 988 | return 0; |
5e3dd157 | 989 | } |