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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; | |
5e3dd157 KV |
106 | |
107 | hdr->eid = ep->eid; | |
108 | hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); | |
27bb178d | 109 | hdr->flags = 0; |
5e3dd157 KV |
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 | ||
5e3dd157 KV |
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]; | |
12acbc43 MK |
125 | int credits = 0; |
126 | int ret; | |
5e3dd157 | 127 | |
affd3217 MK |
128 | if (htc->ar->state == ATH10K_STATE_WEDGED) |
129 | return -ECOMM; | |
130 | ||
5e3dd157 KV |
131 | if (eid >= ATH10K_HTC_EP_COUNT) { |
132 | ath10k_warn("Invalid endpoint id: %d\n", eid); | |
133 | return -ENOENT; | |
134 | } | |
135 | ||
12acbc43 | 136 | /* FIXME: This looks ugly, can we fix it? */ |
5e3dd157 | 137 | spin_lock_bh(&htc->tx_lock); |
08fe9b40 MK |
138 | if (htc->stopped) { |
139 | spin_unlock_bh(&htc->tx_lock); | |
140 | return -ESHUTDOWN; | |
141 | } | |
12acbc43 | 142 | spin_unlock_bh(&htc->tx_lock); |
08fe9b40 | 143 | |
08fe9b40 | 144 | skb_push(skb, sizeof(struct ath10k_htc_hdr)); |
5e3dd157 | 145 | |
12acbc43 MK |
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 | ||
5e3dd157 | 169 | return 0; |
12acbc43 MK |
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; | |
5e3dd157 KV |
185 | } |
186 | ||
187 | static int ath10k_htc_tx_completion_handler(struct ath10k *ar, | |
188 | struct sk_buff *skb, | |
189 | unsigned int eid) | |
190 | { | |
cd003fad | 191 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 | 192 | struct ath10k_htc_ep *ep = &htc->endpoint[eid]; |
5e3dd157 KV |
193 | |
194 | ath10k_htc_notify_tx_completion(ep, skb); | |
195 | /* the skb now belongs to the completion handler */ | |
196 | ||
5e3dd157 KV |
197 | return 0; |
198 | } | |
199 | ||
5e3dd157 KV |
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_htc_ep *ep; | |
211 | int i, n_reports; | |
212 | ||
213 | if (len % sizeof(*report)) | |
214 | ath10k_warn("Uneven credit report len %d", len); | |
215 | ||
216 | n_reports = len / sizeof(*report); | |
217 | ||
218 | spin_lock_bh(&htc->tx_lock); | |
219 | for (i = 0; i < n_reports; i++, report++) { | |
220 | if (report->eid >= ATH10K_HTC_EP_COUNT) | |
221 | break; | |
222 | ||
223 | ath10k_dbg(ATH10K_DBG_HTC, "ep %d got %d credits\n", | |
224 | report->eid, report->credits); | |
225 | ||
226 | ep = &htc->endpoint[report->eid]; | |
227 | ep->tx_credits += report->credits; | |
228 | ||
88e65fc3 MK |
229 | if (ep->ep_ops.ep_tx_credits) { |
230 | spin_unlock_bh(&htc->tx_lock); | |
231 | ep->ep_ops.ep_tx_credits(htc->ar); | |
232 | spin_lock_bh(&htc->tx_lock); | |
233 | } | |
5e3dd157 KV |
234 | } |
235 | spin_unlock_bh(&htc->tx_lock); | |
236 | } | |
237 | ||
238 | static int ath10k_htc_process_trailer(struct ath10k_htc *htc, | |
239 | u8 *buffer, | |
240 | int length, | |
241 | enum ath10k_htc_ep_id src_eid) | |
242 | { | |
243 | int status = 0; | |
244 | struct ath10k_htc_record *record; | |
245 | u8 *orig_buffer; | |
246 | int orig_length; | |
247 | size_t len; | |
248 | ||
249 | orig_buffer = buffer; | |
250 | orig_length = length; | |
251 | ||
252 | while (length > 0) { | |
253 | record = (struct ath10k_htc_record *)buffer; | |
254 | ||
255 | if (length < sizeof(record->hdr)) { | |
256 | status = -EINVAL; | |
257 | break; | |
258 | } | |
259 | ||
260 | if (record->hdr.len > length) { | |
261 | /* no room left in buffer for record */ | |
262 | ath10k_warn("Invalid record length: %d\n", | |
263 | record->hdr.len); | |
264 | status = -EINVAL; | |
265 | break; | |
266 | } | |
267 | ||
268 | switch (record->hdr.id) { | |
269 | case ATH10K_HTC_RECORD_CREDITS: | |
270 | len = sizeof(struct ath10k_htc_credit_report); | |
271 | if (record->hdr.len < len) { | |
272 | ath10k_warn("Credit report too long\n"); | |
273 | status = -EINVAL; | |
274 | break; | |
275 | } | |
276 | ath10k_htc_process_credit_report(htc, | |
277 | record->credit_report, | |
278 | record->hdr.len, | |
279 | src_eid); | |
280 | break; | |
281 | default: | |
282 | ath10k_warn("Unhandled record: id:%d length:%d\n", | |
283 | record->hdr.id, record->hdr.len); | |
284 | break; | |
285 | } | |
286 | ||
287 | if (status) | |
288 | break; | |
289 | ||
290 | /* multiple records may be present in a trailer */ | |
291 | buffer += sizeof(record->hdr) + record->hdr.len; | |
292 | length -= sizeof(record->hdr) + record->hdr.len; | |
293 | } | |
294 | ||
295 | if (status) | |
296 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc rx bad trailer", "", | |
297 | orig_buffer, orig_length); | |
298 | ||
299 | return status; | |
300 | } | |
301 | ||
302 | static int ath10k_htc_rx_completion_handler(struct ath10k *ar, | |
303 | struct sk_buff *skb, | |
304 | u8 pipe_id) | |
305 | { | |
306 | int status = 0; | |
cd003fad | 307 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
308 | struct ath10k_htc_hdr *hdr; |
309 | struct ath10k_htc_ep *ep; | |
310 | u16 payload_len; | |
311 | u32 trailer_len = 0; | |
312 | size_t min_len; | |
313 | u8 eid; | |
314 | bool trailer_present; | |
315 | ||
316 | hdr = (struct ath10k_htc_hdr *)skb->data; | |
317 | skb_pull(skb, sizeof(*hdr)); | |
318 | ||
319 | eid = hdr->eid; | |
320 | ||
321 | if (eid >= ATH10K_HTC_EP_COUNT) { | |
322 | ath10k_warn("HTC Rx: invalid eid %d\n", eid); | |
323 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad header", "", | |
324 | hdr, sizeof(*hdr)); | |
325 | status = -EINVAL; | |
326 | goto out; | |
327 | } | |
328 | ||
329 | ep = &htc->endpoint[eid]; | |
330 | ||
331 | /* | |
332 | * If this endpoint that received a message from the target has | |
333 | * a to-target HIF pipe whose send completions are polled rather | |
334 | * than interrupt-driven, this is a good point to ask HIF to check | |
335 | * whether it has any completed sends to handle. | |
336 | */ | |
337 | if (ep->ul_is_polled) | |
338 | ath10k_htc_send_complete_check(ep, 1); | |
339 | ||
340 | payload_len = __le16_to_cpu(hdr->len); | |
341 | ||
342 | if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { | |
343 | ath10k_warn("HTC rx frame too long, len: %zu\n", | |
344 | payload_len + sizeof(*hdr)); | |
345 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", "", | |
346 | hdr, sizeof(*hdr)); | |
347 | status = -EINVAL; | |
348 | goto out; | |
349 | } | |
350 | ||
351 | if (skb->len < payload_len) { | |
352 | ath10k_dbg(ATH10K_DBG_HTC, | |
353 | "HTC Rx: insufficient length, got %d, expected %d\n", | |
354 | skb->len, payload_len); | |
355 | ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", | |
356 | "", hdr, sizeof(*hdr)); | |
357 | status = -EINVAL; | |
358 | goto out; | |
359 | } | |
360 | ||
361 | /* get flags to check for trailer */ | |
362 | trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; | |
363 | if (trailer_present) { | |
364 | u8 *trailer; | |
365 | ||
366 | trailer_len = hdr->trailer_len; | |
367 | min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); | |
368 | ||
369 | if ((trailer_len < min_len) || | |
370 | (trailer_len > payload_len)) { | |
371 | ath10k_warn("Invalid trailer length: %d\n", | |
372 | trailer_len); | |
373 | status = -EPROTO; | |
374 | goto out; | |
375 | } | |
376 | ||
377 | trailer = (u8 *)hdr; | |
378 | trailer += sizeof(*hdr); | |
379 | trailer += payload_len; | |
380 | trailer -= trailer_len; | |
381 | status = ath10k_htc_process_trailer(htc, trailer, | |
382 | trailer_len, hdr->eid); | |
383 | if (status) | |
384 | goto out; | |
385 | ||
386 | skb_trim(skb, skb->len - trailer_len); | |
387 | } | |
388 | ||
389 | if (((int)payload_len - (int)trailer_len) <= 0) | |
390 | /* zero length packet with trailer data, just drop these */ | |
391 | goto out; | |
392 | ||
393 | if (eid == ATH10K_HTC_EP_0) { | |
394 | struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; | |
395 | ||
396 | switch (__le16_to_cpu(msg->hdr.message_id)) { | |
397 | default: | |
398 | /* handle HTC control message */ | |
399 | if (completion_done(&htc->ctl_resp)) { | |
400 | /* | |
401 | * this is a fatal error, target should not be | |
402 | * sending unsolicited messages on the ep 0 | |
403 | */ | |
404 | ath10k_warn("HTC rx ctrl still processing\n"); | |
405 | status = -EINVAL; | |
406 | complete(&htc->ctl_resp); | |
407 | goto out; | |
408 | } | |
409 | ||
410 | htc->control_resp_len = | |
411 | min_t(int, skb->len, | |
412 | ATH10K_HTC_MAX_CTRL_MSG_LEN); | |
413 | ||
414 | memcpy(htc->control_resp_buffer, skb->data, | |
415 | htc->control_resp_len); | |
416 | ||
417 | complete(&htc->ctl_resp); | |
418 | break; | |
419 | case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: | |
420 | htc->htc_ops.target_send_suspend_complete(ar); | |
421 | } | |
422 | goto out; | |
423 | } | |
424 | ||
425 | ath10k_dbg(ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n", | |
426 | eid, skb); | |
427 | ep->ep_ops.ep_rx_complete(ar, skb); | |
428 | ||
429 | /* skb is now owned by the rx completion handler */ | |
430 | skb = NULL; | |
431 | out: | |
432 | kfree_skb(skb); | |
433 | ||
434 | return status; | |
435 | } | |
436 | ||
437 | static void ath10k_htc_control_rx_complete(struct ath10k *ar, | |
438 | struct sk_buff *skb) | |
439 | { | |
440 | /* This is unexpected. FW is not supposed to send regular rx on this | |
441 | * endpoint. */ | |
442 | ath10k_warn("unexpected htc rx\n"); | |
443 | kfree_skb(skb); | |
444 | } | |
445 | ||
446 | /***************/ | |
447 | /* Init/Deinit */ | |
448 | /***************/ | |
449 | ||
450 | static const char *htc_service_name(enum ath10k_htc_svc_id id) | |
451 | { | |
452 | switch (id) { | |
453 | case ATH10K_HTC_SVC_ID_RESERVED: | |
454 | return "Reserved"; | |
455 | case ATH10K_HTC_SVC_ID_RSVD_CTRL: | |
456 | return "Control"; | |
457 | case ATH10K_HTC_SVC_ID_WMI_CONTROL: | |
458 | return "WMI"; | |
459 | case ATH10K_HTC_SVC_ID_WMI_DATA_BE: | |
460 | return "DATA BE"; | |
461 | case ATH10K_HTC_SVC_ID_WMI_DATA_BK: | |
462 | return "DATA BK"; | |
463 | case ATH10K_HTC_SVC_ID_WMI_DATA_VI: | |
464 | return "DATA VI"; | |
465 | case ATH10K_HTC_SVC_ID_WMI_DATA_VO: | |
466 | return "DATA VO"; | |
467 | case ATH10K_HTC_SVC_ID_NMI_CONTROL: | |
468 | return "NMI Control"; | |
469 | case ATH10K_HTC_SVC_ID_NMI_DATA: | |
470 | return "NMI Data"; | |
471 | case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: | |
472 | return "HTT Data"; | |
473 | case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: | |
474 | return "RAW"; | |
475 | } | |
476 | ||
477 | return "Unknown"; | |
478 | } | |
479 | ||
480 | static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) | |
481 | { | |
482 | struct ath10k_htc_ep *ep; | |
483 | int i; | |
484 | ||
485 | for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { | |
486 | ep = &htc->endpoint[i]; | |
487 | ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; | |
488 | ep->max_ep_message_len = 0; | |
489 | ep->max_tx_queue_depth = 0; | |
490 | ep->eid = i; | |
5e3dd157 KV |
491 | ep->htc = htc; |
492 | ep->tx_credit_flow_enabled = true; | |
5e3dd157 KV |
493 | } |
494 | } | |
495 | ||
496 | static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) | |
497 | { | |
498 | struct ath10k_htc_svc_tx_credits *entry; | |
499 | ||
500 | entry = &htc->service_tx_alloc[0]; | |
501 | ||
502 | /* | |
503 | * for PCIE allocate all credists/HTC buffers to WMI. | |
504 | * no buffers are used/required for data. data always | |
505 | * remains on host. | |
506 | */ | |
507 | entry++; | |
508 | entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; | |
509 | entry->credit_allocation = htc->total_transmit_credits; | |
510 | } | |
511 | ||
512 | static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, | |
513 | u16 service_id) | |
514 | { | |
515 | u8 allocation = 0; | |
516 | int i; | |
517 | ||
518 | for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { | |
519 | if (htc->service_tx_alloc[i].service_id == service_id) | |
520 | allocation = | |
521 | htc->service_tx_alloc[i].credit_allocation; | |
522 | } | |
523 | ||
524 | return allocation; | |
525 | } | |
526 | ||
527 | int ath10k_htc_wait_target(struct ath10k_htc *htc) | |
528 | { | |
529 | int status = 0; | |
530 | struct ath10k_htc_svc_conn_req conn_req; | |
531 | struct ath10k_htc_svc_conn_resp conn_resp; | |
532 | struct ath10k_htc_msg *msg; | |
533 | u16 message_id; | |
534 | u16 credit_count; | |
535 | u16 credit_size; | |
536 | ||
16735d02 | 537 | reinit_completion(&htc->ctl_resp); |
5e3dd157 KV |
538 | |
539 | status = ath10k_hif_start(htc->ar); | |
540 | if (status) { | |
541 | ath10k_err("could not start HIF (%d)\n", status); | |
542 | goto err_start; | |
543 | } | |
544 | ||
545 | status = wait_for_completion_timeout(&htc->ctl_resp, | |
546 | ATH10K_HTC_WAIT_TIMEOUT_HZ); | |
547 | if (status <= 0) { | |
548 | if (status == 0) | |
549 | status = -ETIMEDOUT; | |
550 | ||
551 | ath10k_err("ctl_resp never came in (%d)\n", status); | |
552 | goto err_target; | |
553 | } | |
554 | ||
555 | if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { | |
556 | ath10k_err("Invalid HTC ready msg len:%d\n", | |
557 | htc->control_resp_len); | |
558 | ||
559 | status = -ECOMM; | |
560 | goto err_target; | |
561 | } | |
562 | ||
563 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
564 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
565 | credit_count = __le16_to_cpu(msg->ready.credit_count); | |
566 | credit_size = __le16_to_cpu(msg->ready.credit_size); | |
567 | ||
568 | if (message_id != ATH10K_HTC_MSG_READY_ID) { | |
569 | ath10k_err("Invalid HTC ready msg: 0x%x\n", message_id); | |
570 | status = -ECOMM; | |
571 | goto err_target; | |
572 | } | |
573 | ||
574 | htc->total_transmit_credits = credit_count; | |
575 | htc->target_credit_size = credit_size; | |
576 | ||
577 | ath10k_dbg(ATH10K_DBG_HTC, | |
578 | "Target ready! transmit resources: %d size:%d\n", | |
579 | htc->total_transmit_credits, | |
580 | htc->target_credit_size); | |
581 | ||
582 | if ((htc->total_transmit_credits == 0) || | |
583 | (htc->target_credit_size == 0)) { | |
584 | status = -ECOMM; | |
585 | ath10k_err("Invalid credit size received\n"); | |
586 | goto err_target; | |
587 | } | |
588 | ||
589 | ath10k_htc_setup_target_buffer_assignments(htc); | |
590 | ||
591 | /* setup our pseudo HTC control endpoint connection */ | |
592 | memset(&conn_req, 0, sizeof(conn_req)); | |
593 | memset(&conn_resp, 0, sizeof(conn_resp)); | |
594 | conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; | |
595 | conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; | |
596 | conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; | |
597 | conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; | |
598 | ||
599 | /* connect fake service */ | |
600 | status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); | |
601 | if (status) { | |
602 | ath10k_err("could not connect to htc service (%d)\n", status); | |
603 | goto err_target; | |
604 | } | |
605 | ||
606 | return 0; | |
607 | err_target: | |
608 | ath10k_hif_stop(htc->ar); | |
609 | err_start: | |
610 | return status; | |
611 | } | |
612 | ||
613 | int ath10k_htc_connect_service(struct ath10k_htc *htc, | |
614 | struct ath10k_htc_svc_conn_req *conn_req, | |
615 | struct ath10k_htc_svc_conn_resp *conn_resp) | |
616 | { | |
617 | struct ath10k_htc_msg *msg; | |
618 | struct ath10k_htc_conn_svc *req_msg; | |
619 | struct ath10k_htc_conn_svc_response resp_msg_dummy; | |
620 | struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; | |
621 | enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; | |
622 | struct ath10k_htc_ep *ep; | |
623 | struct sk_buff *skb; | |
624 | unsigned int max_msg_size = 0; | |
625 | int length, status; | |
626 | bool disable_credit_flow_ctrl = false; | |
627 | u16 message_id, service_id, flags = 0; | |
628 | u8 tx_alloc = 0; | |
629 | ||
630 | /* special case for HTC pseudo control service */ | |
631 | if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { | |
632 | disable_credit_flow_ctrl = true; | |
633 | assigned_eid = ATH10K_HTC_EP_0; | |
634 | max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; | |
635 | memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); | |
636 | goto setup; | |
637 | } | |
638 | ||
639 | tx_alloc = ath10k_htc_get_credit_allocation(htc, | |
640 | conn_req->service_id); | |
641 | if (!tx_alloc) | |
42a2efbc KV |
642 | ath10k_dbg(ATH10K_DBG_BOOT, |
643 | "boot htc service %s does not allocate target credits\n", | |
342004be | 644 | htc_service_name(conn_req->service_id)); |
5e3dd157 KV |
645 | |
646 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
647 | if (!skb) { | |
648 | ath10k_err("Failed to allocate HTC packet\n"); | |
649 | return -ENOMEM; | |
650 | } | |
651 | ||
652 | length = sizeof(msg->hdr) + sizeof(msg->connect_service); | |
653 | skb_put(skb, length); | |
654 | memset(skb->data, 0, length); | |
655 | ||
656 | msg = (struct ath10k_htc_msg *)skb->data; | |
657 | msg->hdr.message_id = | |
658 | __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); | |
659 | ||
660 | flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); | |
661 | ||
5e3dd157 KV |
662 | /* Only enable credit flow control for WMI ctrl service */ |
663 | if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { | |
664 | flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; | |
665 | disable_credit_flow_ctrl = true; | |
666 | } | |
667 | ||
0e1cbf9a MK |
668 | req_msg = &msg->connect_service; |
669 | req_msg->flags = __cpu_to_le16(flags); | |
670 | req_msg->service_id = __cpu_to_le16(conn_req->service_id); | |
671 | ||
16735d02 | 672 | reinit_completion(&htc->ctl_resp); |
5e3dd157 KV |
673 | |
674 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
675 | if (status) { | |
676 | kfree_skb(skb); | |
677 | return status; | |
678 | } | |
679 | ||
680 | /* wait for response */ | |
681 | status = wait_for_completion_timeout(&htc->ctl_resp, | |
682 | ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); | |
683 | if (status <= 0) { | |
684 | if (status == 0) | |
685 | status = -ETIMEDOUT; | |
686 | ath10k_err("Service connect timeout: %d\n", status); | |
687 | return status; | |
688 | } | |
689 | ||
690 | /* we controlled the buffer creation, it's aligned */ | |
691 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
692 | resp_msg = &msg->connect_service_response; | |
693 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
694 | service_id = __le16_to_cpu(resp_msg->service_id); | |
695 | ||
696 | if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || | |
697 | (htc->control_resp_len < sizeof(msg->hdr) + | |
698 | sizeof(msg->connect_service_response))) { | |
699 | ath10k_err("Invalid resp message ID 0x%x", message_id); | |
700 | return -EPROTO; | |
701 | } | |
702 | ||
703 | ath10k_dbg(ATH10K_DBG_HTC, | |
704 | "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", | |
705 | htc_service_name(service_id), | |
706 | resp_msg->status, resp_msg->eid); | |
707 | ||
708 | conn_resp->connect_resp_code = resp_msg->status; | |
709 | ||
710 | /* check response status */ | |
711 | if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { | |
712 | ath10k_err("HTC Service %s connect request failed: 0x%x)\n", | |
713 | htc_service_name(service_id), | |
714 | resp_msg->status); | |
715 | return -EPROTO; | |
716 | } | |
717 | ||
718 | assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; | |
719 | max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); | |
720 | ||
721 | setup: | |
722 | ||
723 | if (assigned_eid >= ATH10K_HTC_EP_COUNT) | |
724 | return -EPROTO; | |
725 | ||
726 | if (max_msg_size == 0) | |
727 | return -EPROTO; | |
728 | ||
729 | ep = &htc->endpoint[assigned_eid]; | |
730 | ep->eid = assigned_eid; | |
731 | ||
732 | if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) | |
733 | return -EPROTO; | |
734 | ||
735 | /* return assigned endpoint to caller */ | |
736 | conn_resp->eid = assigned_eid; | |
737 | conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); | |
738 | ||
739 | /* setup the endpoint */ | |
740 | ep->service_id = conn_req->service_id; | |
741 | ep->max_tx_queue_depth = conn_req->max_send_queue_depth; | |
742 | ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); | |
743 | ep->tx_credits = tx_alloc; | |
744 | ep->tx_credit_size = htc->target_credit_size; | |
745 | ep->tx_credits_per_max_message = ep->max_ep_message_len / | |
746 | htc->target_credit_size; | |
747 | ||
748 | if (ep->max_ep_message_len % htc->target_credit_size) | |
749 | ep->tx_credits_per_max_message++; | |
750 | ||
751 | /* copy all the callbacks */ | |
752 | ep->ep_ops = conn_req->ep_ops; | |
753 | ||
754 | status = ath10k_hif_map_service_to_pipe(htc->ar, | |
755 | ep->service_id, | |
756 | &ep->ul_pipe_id, | |
757 | &ep->dl_pipe_id, | |
758 | &ep->ul_is_polled, | |
759 | &ep->dl_is_polled); | |
760 | if (status) | |
761 | return status; | |
762 | ||
42a2efbc KV |
763 | ath10k_dbg(ATH10K_DBG_BOOT, |
764 | "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", | |
5e3dd157 KV |
765 | htc_service_name(ep->service_id), ep->ul_pipe_id, |
766 | ep->dl_pipe_id, ep->eid); | |
767 | ||
42a2efbc KV |
768 | ath10k_dbg(ATH10K_DBG_BOOT, |
769 | "boot htc ep %d ul polled %d dl polled %d\n", | |
5e3dd157 KV |
770 | ep->eid, ep->ul_is_polled, ep->dl_is_polled); |
771 | ||
772 | if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { | |
773 | ep->tx_credit_flow_enabled = false; | |
42a2efbc KV |
774 | ath10k_dbg(ATH10K_DBG_BOOT, |
775 | "boot htc service '%s' eid %d TX flow control disabled\n", | |
5e3dd157 KV |
776 | htc_service_name(ep->service_id), assigned_eid); |
777 | } | |
778 | ||
779 | return status; | |
780 | } | |
781 | ||
782 | struct sk_buff *ath10k_htc_alloc_skb(int size) | |
783 | { | |
784 | struct sk_buff *skb; | |
785 | ||
786 | skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); | |
787 | if (!skb) { | |
788 | ath10k_warn("could not allocate HTC tx skb\n"); | |
789 | return NULL; | |
790 | } | |
791 | ||
792 | skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); | |
793 | ||
794 | /* FW/HTC requires 4-byte aligned streams */ | |
795 | if (!IS_ALIGNED((unsigned long)skb->data, 4)) | |
796 | ath10k_warn("Unaligned HTC tx skb\n"); | |
797 | ||
798 | return skb; | |
799 | } | |
800 | ||
801 | int ath10k_htc_start(struct ath10k_htc *htc) | |
802 | { | |
803 | struct sk_buff *skb; | |
804 | int status = 0; | |
805 | struct ath10k_htc_msg *msg; | |
806 | ||
807 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
808 | if (!skb) | |
809 | return -ENOMEM; | |
810 | ||
811 | skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); | |
812 | memset(skb->data, 0, skb->len); | |
813 | ||
814 | msg = (struct ath10k_htc_msg *)skb->data; | |
815 | msg->hdr.message_id = | |
816 | __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); | |
817 | ||
818 | ath10k_dbg(ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); | |
819 | ||
820 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
821 | if (status) { | |
822 | kfree_skb(skb); | |
823 | return status; | |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /* | |
830 | * stop HTC communications, i.e. stop interrupt reception, and flush all | |
831 | * queued buffers | |
832 | */ | |
833 | void ath10k_htc_stop(struct ath10k_htc *htc) | |
834 | { | |
5e3dd157 | 835 | spin_lock_bh(&htc->tx_lock); |
08fe9b40 | 836 | htc->stopped = true; |
5e3dd157 KV |
837 | spin_unlock_bh(&htc->tx_lock); |
838 | ||
5e3dd157 | 839 | ath10k_hif_stop(htc->ar); |
5e3dd157 KV |
840 | } |
841 | ||
842 | /* registered target arrival callback from the HIF layer */ | |
cd003fad | 843 | int ath10k_htc_init(struct ath10k *ar) |
5e3dd157 KV |
844 | { |
845 | struct ath10k_hif_cb htc_callbacks; | |
846 | struct ath10k_htc_ep *ep = NULL; | |
cd003fad | 847 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
848 | |
849 | spin_lock_init(&htc->tx_lock); | |
850 | ||
08fe9b40 | 851 | htc->stopped = false; |
5e3dd157 KV |
852 | ath10k_htc_reset_endpoint_states(htc); |
853 | ||
854 | /* setup HIF layer callbacks */ | |
855 | htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler; | |
856 | htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler; | |
857 | htc->ar = ar; | |
858 | ||
859 | /* Get HIF default pipe for HTC message exchange */ | |
860 | ep = &htc->endpoint[ATH10K_HTC_EP_0]; | |
861 | ||
e799bbff | 862 | ath10k_hif_set_callbacks(ar, &htc_callbacks); |
5e3dd157 KV |
863 | ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); |
864 | ||
865 | init_completion(&htc->ctl_resp); | |
866 | ||
cd003fad | 867 | return 0; |
5e3dd157 | 868 | } |