Commit | Line | Data |
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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 | ||
5e3dd157 KV |
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); | |
8cc7f26c | 38 | if (!skb) |
5e3dd157 | 39 | return NULL; |
5e3dd157 KV |
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 | ||
75b34800 | 47 | ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb); |
5e3dd157 KV |
48 | return skb; |
49 | } | |
50 | ||
51 | static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc, | |
52 | struct sk_buff *skb) | |
53 | { | |
767d34fc MK |
54 | struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); |
55 | ||
56 | dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); | |
5e3dd157 KV |
57 | skb_pull(skb, sizeof(struct ath10k_htc_hdr)); |
58 | } | |
59 | ||
60 | static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, | |
61 | struct sk_buff *skb) | |
62 | { | |
7aa7a72a MK |
63 | struct ath10k *ar = ep->htc->ar; |
64 | ||
75b34800 | 65 | ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__, |
5e3dd157 KV |
66 | ep->eid, skb); |
67 | ||
68 | ath10k_htc_restore_tx_skb(ep->htc, skb); | |
69 | ||
70 | if (!ep->ep_ops.ep_tx_complete) { | |
7aa7a72a | 71 | ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid); |
5e3dd157 KV |
72 | dev_kfree_skb_any(skb); |
73 | return; | |
74 | } | |
75 | ||
76 | ep->ep_ops.ep_tx_complete(ep->htc->ar, skb); | |
77 | } | |
78 | ||
5e3dd157 KV |
79 | static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep, |
80 | struct sk_buff *skb) | |
81 | { | |
82 | struct ath10k_htc_hdr *hdr; | |
83 | ||
84 | hdr = (struct ath10k_htc_hdr *)skb->data; | |
5e3dd157 KV |
85 | |
86 | hdr->eid = ep->eid; | |
87 | hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); | |
27bb178d | 88 | hdr->flags = 0; |
5d5c8ec9 | 89 | hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE; |
5e3dd157 KV |
90 | |
91 | spin_lock_bh(&ep->htc->tx_lock); | |
92 | hdr->seq_no = ep->seq_no++; | |
5e3dd157 KV |
93 | spin_unlock_bh(&ep->htc->tx_lock); |
94 | } | |
95 | ||
5e3dd157 KV |
96 | int ath10k_htc_send(struct ath10k_htc *htc, |
97 | enum ath10k_htc_ep_id eid, | |
98 | struct sk_buff *skb) | |
99 | { | |
7aa7a72a | 100 | struct ath10k *ar = htc->ar; |
5e3dd157 | 101 | struct ath10k_htc_ep *ep = &htc->endpoint[eid]; |
767d34fc | 102 | struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); |
726346fc | 103 | struct ath10k_hif_sg_item sg_item; |
767d34fc | 104 | struct device *dev = htc->ar->dev; |
12acbc43 MK |
105 | int credits = 0; |
106 | int ret; | |
5e3dd157 | 107 | |
affd3217 MK |
108 | if (htc->ar->state == ATH10K_STATE_WEDGED) |
109 | return -ECOMM; | |
110 | ||
5e3dd157 | 111 | if (eid >= ATH10K_HTC_EP_COUNT) { |
7aa7a72a | 112 | ath10k_warn(ar, "Invalid endpoint id: %d\n", eid); |
5e3dd157 KV |
113 | return -ENOENT; |
114 | } | |
115 | ||
08fe9b40 | 116 | skb_push(skb, sizeof(struct ath10k_htc_hdr)); |
5e3dd157 | 117 | |
12acbc43 MK |
118 | if (ep->tx_credit_flow_enabled) { |
119 | credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); | |
120 | spin_lock_bh(&htc->tx_lock); | |
121 | if (ep->tx_credits < credits) { | |
122 | spin_unlock_bh(&htc->tx_lock); | |
123 | ret = -EAGAIN; | |
124 | goto err_pull; | |
125 | } | |
126 | ep->tx_credits -= credits; | |
7aa7a72a | 127 | ath10k_dbg(ar, ATH10K_DBG_HTC, |
4bfee8e8 MK |
128 | "htc ep %d consumed %d credits (total %d)\n", |
129 | eid, credits, ep->tx_credits); | |
12acbc43 MK |
130 | spin_unlock_bh(&htc->tx_lock); |
131 | } | |
132 | ||
133 | ath10k_htc_prepare_tx_skb(ep, skb); | |
134 | ||
d84a512d | 135 | skb_cb->eid = eid; |
767d34fc MK |
136 | skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); |
137 | ret = dma_mapping_error(dev, skb_cb->paddr); | |
5e55e3cb MK |
138 | if (ret) { |
139 | ret = -EIO; | |
12acbc43 | 140 | goto err_credits; |
5e55e3cb | 141 | } |
12acbc43 | 142 | |
726346fc MK |
143 | sg_item.transfer_id = ep->eid; |
144 | sg_item.transfer_context = skb; | |
145 | sg_item.vaddr = skb->data; | |
146 | sg_item.paddr = skb_cb->paddr; | |
147 | sg_item.len = skb->len; | |
148 | ||
149 | ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1); | |
12acbc43 MK |
150 | if (ret) |
151 | goto err_unmap; | |
152 | ||
5e3dd157 | 153 | return 0; |
12acbc43 MK |
154 | |
155 | err_unmap: | |
767d34fc | 156 | dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); |
12acbc43 MK |
157 | err_credits: |
158 | if (ep->tx_credit_flow_enabled) { | |
159 | spin_lock_bh(&htc->tx_lock); | |
160 | ep->tx_credits += credits; | |
7aa7a72a | 161 | ath10k_dbg(ar, ATH10K_DBG_HTC, |
4bfee8e8 MK |
162 | "htc ep %d reverted %d credits back (total %d)\n", |
163 | eid, credits, ep->tx_credits); | |
12acbc43 MK |
164 | spin_unlock_bh(&htc->tx_lock); |
165 | ||
166 | if (ep->ep_ops.ep_tx_credits) | |
167 | ep->ep_ops.ep_tx_credits(htc->ar); | |
168 | } | |
169 | err_pull: | |
170 | skb_pull(skb, sizeof(struct ath10k_htc_hdr)); | |
171 | return ret; | |
5e3dd157 KV |
172 | } |
173 | ||
0e5b2950 | 174 | void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb) |
5e3dd157 | 175 | { |
cd003fad | 176 | struct ath10k_htc *htc = &ar->htc; |
d84a512d MK |
177 | struct ath10k_skb_cb *skb_cb; |
178 | struct ath10k_htc_ep *ep; | |
5e3dd157 | 179 | |
a16942e6 | 180 | if (WARN_ON_ONCE(!skb)) |
0e5b2950 | 181 | return; |
2415fc16 | 182 | |
d84a512d MK |
183 | skb_cb = ATH10K_SKB_CB(skb); |
184 | ep = &htc->endpoint[skb_cb->eid]; | |
185 | ||
5e3dd157 KV |
186 | ath10k_htc_notify_tx_completion(ep, skb); |
187 | /* the skb now belongs to the completion handler */ | |
5e3dd157 | 188 | } |
aed1dc82 | 189 | EXPORT_SYMBOL(ath10k_htc_tx_completion_handler); |
5e3dd157 | 190 | |
5e3dd157 KV |
191 | /***********/ |
192 | /* Receive */ | |
193 | /***********/ | |
194 | ||
195 | static void | |
196 | ath10k_htc_process_credit_report(struct ath10k_htc *htc, | |
197 | const struct ath10k_htc_credit_report *report, | |
198 | int len, | |
199 | enum ath10k_htc_ep_id eid) | |
200 | { | |
7aa7a72a | 201 | struct ath10k *ar = htc->ar; |
5e3dd157 KV |
202 | struct ath10k_htc_ep *ep; |
203 | int i, n_reports; | |
204 | ||
205 | if (len % sizeof(*report)) | |
7aa7a72a | 206 | ath10k_warn(ar, "Uneven credit report len %d", len); |
5e3dd157 KV |
207 | |
208 | n_reports = len / sizeof(*report); | |
209 | ||
210 | spin_lock_bh(&htc->tx_lock); | |
211 | for (i = 0; i < n_reports; i++, report++) { | |
212 | if (report->eid >= ATH10K_HTC_EP_COUNT) | |
213 | break; | |
214 | ||
5e3dd157 KV |
215 | ep = &htc->endpoint[report->eid]; |
216 | ep->tx_credits += report->credits; | |
217 | ||
7aa7a72a | 218 | ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", |
4bfee8e8 MK |
219 | report->eid, report->credits, ep->tx_credits); |
220 | ||
88e65fc3 MK |
221 | if (ep->ep_ops.ep_tx_credits) { |
222 | spin_unlock_bh(&htc->tx_lock); | |
223 | ep->ep_ops.ep_tx_credits(htc->ar); | |
224 | spin_lock_bh(&htc->tx_lock); | |
225 | } | |
5e3dd157 KV |
226 | } |
227 | spin_unlock_bh(&htc->tx_lock); | |
228 | } | |
229 | ||
230 | static int ath10k_htc_process_trailer(struct ath10k_htc *htc, | |
231 | u8 *buffer, | |
232 | int length, | |
233 | enum ath10k_htc_ep_id src_eid) | |
234 | { | |
7aa7a72a | 235 | struct ath10k *ar = htc->ar; |
5e3dd157 KV |
236 | int status = 0; |
237 | struct ath10k_htc_record *record; | |
238 | u8 *orig_buffer; | |
239 | int orig_length; | |
240 | size_t len; | |
241 | ||
242 | orig_buffer = buffer; | |
243 | orig_length = length; | |
244 | ||
245 | while (length > 0) { | |
246 | record = (struct ath10k_htc_record *)buffer; | |
247 | ||
248 | if (length < sizeof(record->hdr)) { | |
249 | status = -EINVAL; | |
250 | break; | |
251 | } | |
252 | ||
253 | if (record->hdr.len > length) { | |
254 | /* no room left in buffer for record */ | |
7aa7a72a | 255 | ath10k_warn(ar, "Invalid record length: %d\n", |
5e3dd157 KV |
256 | record->hdr.len); |
257 | status = -EINVAL; | |
258 | break; | |
259 | } | |
260 | ||
261 | switch (record->hdr.id) { | |
262 | case ATH10K_HTC_RECORD_CREDITS: | |
263 | len = sizeof(struct ath10k_htc_credit_report); | |
264 | if (record->hdr.len < len) { | |
7aa7a72a | 265 | ath10k_warn(ar, "Credit report too long\n"); |
5e3dd157 KV |
266 | status = -EINVAL; |
267 | break; | |
268 | } | |
269 | ath10k_htc_process_credit_report(htc, | |
270 | record->credit_report, | |
271 | record->hdr.len, | |
272 | src_eid); | |
273 | break; | |
274 | default: | |
7aa7a72a | 275 | ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", |
5e3dd157 KV |
276 | record->hdr.id, record->hdr.len); |
277 | break; | |
278 | } | |
279 | ||
280 | if (status) | |
281 | break; | |
282 | ||
283 | /* multiple records may be present in a trailer */ | |
284 | buffer += sizeof(record->hdr) + record->hdr.len; | |
285 | length -= sizeof(record->hdr) + record->hdr.len; | |
286 | } | |
287 | ||
288 | if (status) | |
7aa7a72a | 289 | ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "", |
5e3dd157 KV |
290 | orig_buffer, orig_length); |
291 | ||
292 | return status; | |
293 | } | |
294 | ||
9d9bdbb0 | 295 | void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) |
5e3dd157 KV |
296 | { |
297 | int status = 0; | |
cd003fad | 298 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
299 | struct ath10k_htc_hdr *hdr; |
300 | struct ath10k_htc_ep *ep; | |
301 | u16 payload_len; | |
302 | u32 trailer_len = 0; | |
303 | size_t min_len; | |
304 | u8 eid; | |
305 | bool trailer_present; | |
306 | ||
307 | hdr = (struct ath10k_htc_hdr *)skb->data; | |
308 | skb_pull(skb, sizeof(*hdr)); | |
309 | ||
310 | eid = hdr->eid; | |
311 | ||
312 | if (eid >= ATH10K_HTC_EP_COUNT) { | |
7aa7a72a MK |
313 | ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid); |
314 | ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "", | |
5e3dd157 | 315 | hdr, sizeof(*hdr)); |
5e3dd157 KV |
316 | goto out; |
317 | } | |
318 | ||
319 | ep = &htc->endpoint[eid]; | |
320 | ||
5e3dd157 KV |
321 | payload_len = __le16_to_cpu(hdr->len); |
322 | ||
323 | if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { | |
7aa7a72a | 324 | ath10k_warn(ar, "HTC rx frame too long, len: %zu\n", |
5e3dd157 | 325 | payload_len + sizeof(*hdr)); |
7aa7a72a | 326 | ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "", |
5e3dd157 | 327 | hdr, sizeof(*hdr)); |
5e3dd157 KV |
328 | goto out; |
329 | } | |
330 | ||
331 | if (skb->len < payload_len) { | |
7aa7a72a | 332 | ath10k_dbg(ar, ATH10K_DBG_HTC, |
5e3dd157 KV |
333 | "HTC Rx: insufficient length, got %d, expected %d\n", |
334 | skb->len, payload_len); | |
7aa7a72a | 335 | ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", |
5e3dd157 | 336 | "", hdr, sizeof(*hdr)); |
5e3dd157 KV |
337 | goto out; |
338 | } | |
339 | ||
340 | /* get flags to check for trailer */ | |
341 | trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; | |
342 | if (trailer_present) { | |
343 | u8 *trailer; | |
344 | ||
345 | trailer_len = hdr->trailer_len; | |
346 | min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); | |
347 | ||
348 | if ((trailer_len < min_len) || | |
349 | (trailer_len > payload_len)) { | |
7aa7a72a | 350 | ath10k_warn(ar, "Invalid trailer length: %d\n", |
5e3dd157 | 351 | trailer_len); |
5e3dd157 KV |
352 | goto out; |
353 | } | |
354 | ||
355 | trailer = (u8 *)hdr; | |
356 | trailer += sizeof(*hdr); | |
357 | trailer += payload_len; | |
358 | trailer -= trailer_len; | |
359 | status = ath10k_htc_process_trailer(htc, trailer, | |
360 | trailer_len, hdr->eid); | |
361 | if (status) | |
362 | goto out; | |
363 | ||
364 | skb_trim(skb, skb->len - trailer_len); | |
365 | } | |
366 | ||
367 | if (((int)payload_len - (int)trailer_len) <= 0) | |
368 | /* zero length packet with trailer data, just drop these */ | |
369 | goto out; | |
370 | ||
371 | if (eid == ATH10K_HTC_EP_0) { | |
372 | struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; | |
373 | ||
374 | switch (__le16_to_cpu(msg->hdr.message_id)) { | |
5dc0f1db MK |
375 | case ATH10K_HTC_MSG_READY_ID: |
376 | case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID: | |
5e3dd157 KV |
377 | /* handle HTC control message */ |
378 | if (completion_done(&htc->ctl_resp)) { | |
379 | /* | |
380 | * this is a fatal error, target should not be | |
381 | * sending unsolicited messages on the ep 0 | |
382 | */ | |
7aa7a72a | 383 | ath10k_warn(ar, "HTC rx ctrl still processing\n"); |
5e3dd157 KV |
384 | complete(&htc->ctl_resp); |
385 | goto out; | |
386 | } | |
387 | ||
388 | htc->control_resp_len = | |
389 | min_t(int, skb->len, | |
390 | ATH10K_HTC_MAX_CTRL_MSG_LEN); | |
391 | ||
392 | memcpy(htc->control_resp_buffer, skb->data, | |
393 | htc->control_resp_len); | |
394 | ||
395 | complete(&htc->ctl_resp); | |
396 | break; | |
397 | case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: | |
398 | htc->htc_ops.target_send_suspend_complete(ar); | |
5dc0f1db MK |
399 | break; |
400 | default: | |
401 | ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n"); | |
402 | break; | |
5e3dd157 KV |
403 | } |
404 | goto out; | |
405 | } | |
406 | ||
75b34800 | 407 | ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n", |
5e3dd157 KV |
408 | eid, skb); |
409 | ep->ep_ops.ep_rx_complete(ar, skb); | |
410 | ||
411 | /* skb is now owned by the rx completion handler */ | |
412 | skb = NULL; | |
413 | out: | |
414 | kfree_skb(skb); | |
5e3dd157 | 415 | } |
aed1dc82 | 416 | EXPORT_SYMBOL(ath10k_htc_rx_completion_handler); |
5e3dd157 KV |
417 | |
418 | static void ath10k_htc_control_rx_complete(struct ath10k *ar, | |
419 | struct sk_buff *skb) | |
420 | { | |
421 | /* This is unexpected. FW is not supposed to send regular rx on this | |
422 | * endpoint. */ | |
7aa7a72a | 423 | ath10k_warn(ar, "unexpected htc rx\n"); |
5e3dd157 KV |
424 | kfree_skb(skb); |
425 | } | |
426 | ||
427 | /***************/ | |
428 | /* Init/Deinit */ | |
429 | /***************/ | |
430 | ||
431 | static const char *htc_service_name(enum ath10k_htc_svc_id id) | |
432 | { | |
433 | switch (id) { | |
434 | case ATH10K_HTC_SVC_ID_RESERVED: | |
435 | return "Reserved"; | |
436 | case ATH10K_HTC_SVC_ID_RSVD_CTRL: | |
437 | return "Control"; | |
438 | case ATH10K_HTC_SVC_ID_WMI_CONTROL: | |
439 | return "WMI"; | |
440 | case ATH10K_HTC_SVC_ID_WMI_DATA_BE: | |
441 | return "DATA BE"; | |
442 | case ATH10K_HTC_SVC_ID_WMI_DATA_BK: | |
443 | return "DATA BK"; | |
444 | case ATH10K_HTC_SVC_ID_WMI_DATA_VI: | |
445 | return "DATA VI"; | |
446 | case ATH10K_HTC_SVC_ID_WMI_DATA_VO: | |
447 | return "DATA VO"; | |
448 | case ATH10K_HTC_SVC_ID_NMI_CONTROL: | |
449 | return "NMI Control"; | |
450 | case ATH10K_HTC_SVC_ID_NMI_DATA: | |
451 | return "NMI Data"; | |
452 | case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: | |
453 | return "HTT Data"; | |
454 | case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: | |
455 | return "RAW"; | |
456 | } | |
457 | ||
458 | return "Unknown"; | |
459 | } | |
460 | ||
461 | static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) | |
462 | { | |
463 | struct ath10k_htc_ep *ep; | |
464 | int i; | |
465 | ||
466 | for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { | |
467 | ep = &htc->endpoint[i]; | |
468 | ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; | |
469 | ep->max_ep_message_len = 0; | |
470 | ep->max_tx_queue_depth = 0; | |
471 | ep->eid = i; | |
5e3dd157 KV |
472 | ep->htc = htc; |
473 | ep->tx_credit_flow_enabled = true; | |
5e3dd157 KV |
474 | } |
475 | } | |
476 | ||
477 | static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) | |
478 | { | |
479 | struct ath10k_htc_svc_tx_credits *entry; | |
480 | ||
481 | entry = &htc->service_tx_alloc[0]; | |
482 | ||
483 | /* | |
484 | * for PCIE allocate all credists/HTC buffers to WMI. | |
485 | * no buffers are used/required for data. data always | |
486 | * remains on host. | |
487 | */ | |
488 | entry++; | |
489 | entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; | |
490 | entry->credit_allocation = htc->total_transmit_credits; | |
491 | } | |
492 | ||
493 | static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, | |
494 | u16 service_id) | |
495 | { | |
496 | u8 allocation = 0; | |
497 | int i; | |
498 | ||
499 | for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { | |
500 | if (htc->service_tx_alloc[i].service_id == service_id) | |
501 | allocation = | |
502 | htc->service_tx_alloc[i].credit_allocation; | |
503 | } | |
504 | ||
505 | return allocation; | |
506 | } | |
507 | ||
508 | int ath10k_htc_wait_target(struct ath10k_htc *htc) | |
509 | { | |
7aa7a72a | 510 | struct ath10k *ar = htc->ar; |
da34fad6 | 511 | int i, status = 0; |
7c377c3d | 512 | unsigned long time_left; |
5e3dd157 KV |
513 | struct ath10k_htc_svc_conn_req conn_req; |
514 | struct ath10k_htc_svc_conn_resp conn_resp; | |
515 | struct ath10k_htc_msg *msg; | |
516 | u16 message_id; | |
517 | u16 credit_count; | |
518 | u16 credit_size; | |
519 | ||
7c377c3d NMG |
520 | time_left = wait_for_completion_timeout(&htc->ctl_resp, |
521 | ATH10K_HTC_WAIT_TIMEOUT_HZ); | |
522 | if (!time_left) { | |
da34fad6 MK |
523 | /* Workaround: In some cases the PCI HIF doesn't |
524 | * receive interrupt for the control response message | |
525 | * even if the buffer was completed. It is suspected | |
526 | * iomap writes unmasking PCI CE irqs aren't propagated | |
527 | * properly in KVM PCI-passthrough sometimes. | |
528 | */ | |
7aa7a72a | 529 | ath10k_warn(ar, "failed to receive control response completion, polling..\n"); |
da34fad6 MK |
530 | |
531 | for (i = 0; i < CE_COUNT; i++) | |
532 | ath10k_hif_send_complete_check(htc->ar, i, 1); | |
533 | ||
7c377c3d NMG |
534 | time_left = |
535 | wait_for_completion_timeout(&htc->ctl_resp, | |
536 | ATH10K_HTC_WAIT_TIMEOUT_HZ); | |
da34fad6 | 537 | |
7c377c3d | 538 | if (!time_left) |
5e3dd157 | 539 | status = -ETIMEDOUT; |
da34fad6 | 540 | } |
5e3dd157 | 541 | |
da34fad6 | 542 | if (status < 0) { |
7aa7a72a | 543 | ath10k_err(ar, "ctl_resp never came in (%d)\n", status); |
67e3c63f | 544 | return status; |
5e3dd157 KV |
545 | } |
546 | ||
547 | if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { | |
7aa7a72a | 548 | ath10k_err(ar, "Invalid HTC ready msg len:%d\n", |
5e3dd157 | 549 | htc->control_resp_len); |
67e3c63f | 550 | return -ECOMM; |
5e3dd157 KV |
551 | } |
552 | ||
553 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
554 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
555 | credit_count = __le16_to_cpu(msg->ready.credit_count); | |
556 | credit_size = __le16_to_cpu(msg->ready.credit_size); | |
557 | ||
558 | if (message_id != ATH10K_HTC_MSG_READY_ID) { | |
7aa7a72a | 559 | ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id); |
67e3c63f | 560 | return -ECOMM; |
5e3dd157 KV |
561 | } |
562 | ||
563 | htc->total_transmit_credits = credit_count; | |
564 | htc->target_credit_size = credit_size; | |
565 | ||
7aa7a72a | 566 | ath10k_dbg(ar, ATH10K_DBG_HTC, |
5e3dd157 KV |
567 | "Target ready! transmit resources: %d size:%d\n", |
568 | htc->total_transmit_credits, | |
569 | htc->target_credit_size); | |
570 | ||
571 | if ((htc->total_transmit_credits == 0) || | |
572 | (htc->target_credit_size == 0)) { | |
7aa7a72a | 573 | ath10k_err(ar, "Invalid credit size received\n"); |
67e3c63f | 574 | return -ECOMM; |
5e3dd157 KV |
575 | } |
576 | ||
577 | ath10k_htc_setup_target_buffer_assignments(htc); | |
578 | ||
579 | /* setup our pseudo HTC control endpoint connection */ | |
580 | memset(&conn_req, 0, sizeof(conn_req)); | |
581 | memset(&conn_resp, 0, sizeof(conn_resp)); | |
582 | conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; | |
583 | conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; | |
584 | conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; | |
585 | conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; | |
586 | ||
587 | /* connect fake service */ | |
588 | status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); | |
589 | if (status) { | |
7aa7a72a MK |
590 | ath10k_err(ar, "could not connect to htc service (%d)\n", |
591 | status); | |
67e3c63f | 592 | return status; |
5e3dd157 KV |
593 | } |
594 | ||
595 | return 0; | |
5e3dd157 KV |
596 | } |
597 | ||
598 | int ath10k_htc_connect_service(struct ath10k_htc *htc, | |
599 | struct ath10k_htc_svc_conn_req *conn_req, | |
600 | struct ath10k_htc_svc_conn_resp *conn_resp) | |
601 | { | |
7aa7a72a | 602 | struct ath10k *ar = htc->ar; |
5e3dd157 KV |
603 | struct ath10k_htc_msg *msg; |
604 | struct ath10k_htc_conn_svc *req_msg; | |
605 | struct ath10k_htc_conn_svc_response resp_msg_dummy; | |
606 | struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; | |
607 | enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; | |
608 | struct ath10k_htc_ep *ep; | |
609 | struct sk_buff *skb; | |
610 | unsigned int max_msg_size = 0; | |
611 | int length, status; | |
7c377c3d | 612 | unsigned long time_left; |
5e3dd157 KV |
613 | bool disable_credit_flow_ctrl = false; |
614 | u16 message_id, service_id, flags = 0; | |
615 | u8 tx_alloc = 0; | |
616 | ||
617 | /* special case for HTC pseudo control service */ | |
618 | if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { | |
619 | disable_credit_flow_ctrl = true; | |
620 | assigned_eid = ATH10K_HTC_EP_0; | |
621 | max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; | |
622 | memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); | |
623 | goto setup; | |
624 | } | |
625 | ||
626 | tx_alloc = ath10k_htc_get_credit_allocation(htc, | |
627 | conn_req->service_id); | |
628 | if (!tx_alloc) | |
7aa7a72a | 629 | ath10k_dbg(ar, ATH10K_DBG_BOOT, |
42a2efbc | 630 | "boot htc service %s does not allocate target credits\n", |
342004be | 631 | htc_service_name(conn_req->service_id)); |
5e3dd157 KV |
632 | |
633 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
634 | if (!skb) { | |
7aa7a72a | 635 | ath10k_err(ar, "Failed to allocate HTC packet\n"); |
5e3dd157 KV |
636 | return -ENOMEM; |
637 | } | |
638 | ||
639 | length = sizeof(msg->hdr) + sizeof(msg->connect_service); | |
640 | skb_put(skb, length); | |
641 | memset(skb->data, 0, length); | |
642 | ||
643 | msg = (struct ath10k_htc_msg *)skb->data; | |
644 | msg->hdr.message_id = | |
645 | __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); | |
646 | ||
647 | flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); | |
648 | ||
5e3dd157 KV |
649 | /* Only enable credit flow control for WMI ctrl service */ |
650 | if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { | |
651 | flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; | |
652 | disable_credit_flow_ctrl = true; | |
653 | } | |
654 | ||
0e1cbf9a MK |
655 | req_msg = &msg->connect_service; |
656 | req_msg->flags = __cpu_to_le16(flags); | |
657 | req_msg->service_id = __cpu_to_le16(conn_req->service_id); | |
658 | ||
16735d02 | 659 | reinit_completion(&htc->ctl_resp); |
5e3dd157 KV |
660 | |
661 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
662 | if (status) { | |
663 | kfree_skb(skb); | |
664 | return status; | |
665 | } | |
666 | ||
667 | /* wait for response */ | |
7c377c3d NMG |
668 | time_left = wait_for_completion_timeout(&htc->ctl_resp, |
669 | ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); | |
670 | if (!time_left) { | |
671 | ath10k_err(ar, "Service connect timeout\n"); | |
38e2a644 | 672 | return -ETIMEDOUT; |
5e3dd157 KV |
673 | } |
674 | ||
675 | /* we controlled the buffer creation, it's aligned */ | |
676 | msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; | |
677 | resp_msg = &msg->connect_service_response; | |
678 | message_id = __le16_to_cpu(msg->hdr.message_id); | |
679 | service_id = __le16_to_cpu(resp_msg->service_id); | |
680 | ||
681 | if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || | |
682 | (htc->control_resp_len < sizeof(msg->hdr) + | |
683 | sizeof(msg->connect_service_response))) { | |
7aa7a72a | 684 | ath10k_err(ar, "Invalid resp message ID 0x%x", message_id); |
5e3dd157 KV |
685 | return -EPROTO; |
686 | } | |
687 | ||
7aa7a72a | 688 | ath10k_dbg(ar, ATH10K_DBG_HTC, |
5e3dd157 KV |
689 | "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", |
690 | htc_service_name(service_id), | |
691 | resp_msg->status, resp_msg->eid); | |
692 | ||
693 | conn_resp->connect_resp_code = resp_msg->status; | |
694 | ||
695 | /* check response status */ | |
696 | if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { | |
7aa7a72a | 697 | ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n", |
5e3dd157 KV |
698 | htc_service_name(service_id), |
699 | resp_msg->status); | |
700 | return -EPROTO; | |
701 | } | |
702 | ||
703 | assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; | |
704 | max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); | |
705 | ||
706 | setup: | |
707 | ||
708 | if (assigned_eid >= ATH10K_HTC_EP_COUNT) | |
709 | return -EPROTO; | |
710 | ||
711 | if (max_msg_size == 0) | |
712 | return -EPROTO; | |
713 | ||
714 | ep = &htc->endpoint[assigned_eid]; | |
715 | ep->eid = assigned_eid; | |
716 | ||
717 | if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) | |
718 | return -EPROTO; | |
719 | ||
720 | /* return assigned endpoint to caller */ | |
721 | conn_resp->eid = assigned_eid; | |
722 | conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); | |
723 | ||
724 | /* setup the endpoint */ | |
725 | ep->service_id = conn_req->service_id; | |
726 | ep->max_tx_queue_depth = conn_req->max_send_queue_depth; | |
727 | ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); | |
728 | ep->tx_credits = tx_alloc; | |
729 | ep->tx_credit_size = htc->target_credit_size; | |
730 | ep->tx_credits_per_max_message = ep->max_ep_message_len / | |
731 | htc->target_credit_size; | |
732 | ||
733 | if (ep->max_ep_message_len % htc->target_credit_size) | |
734 | ep->tx_credits_per_max_message++; | |
735 | ||
736 | /* copy all the callbacks */ | |
737 | ep->ep_ops = conn_req->ep_ops; | |
738 | ||
739 | status = ath10k_hif_map_service_to_pipe(htc->ar, | |
740 | ep->service_id, | |
741 | &ep->ul_pipe_id, | |
400143e4 | 742 | &ep->dl_pipe_id); |
5e3dd157 KV |
743 | if (status) |
744 | return status; | |
745 | ||
7aa7a72a | 746 | ath10k_dbg(ar, ATH10K_DBG_BOOT, |
42a2efbc | 747 | "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", |
5e3dd157 KV |
748 | htc_service_name(ep->service_id), ep->ul_pipe_id, |
749 | ep->dl_pipe_id, ep->eid); | |
750 | ||
5e3dd157 KV |
751 | if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { |
752 | ep->tx_credit_flow_enabled = false; | |
7aa7a72a | 753 | ath10k_dbg(ar, ATH10K_DBG_BOOT, |
42a2efbc | 754 | "boot htc service '%s' eid %d TX flow control disabled\n", |
5e3dd157 KV |
755 | htc_service_name(ep->service_id), assigned_eid); |
756 | } | |
757 | ||
758 | return status; | |
759 | } | |
760 | ||
7aa7a72a | 761 | struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size) |
5e3dd157 KV |
762 | { |
763 | struct sk_buff *skb; | |
764 | ||
765 | skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); | |
8cc7f26c | 766 | if (!skb) |
5e3dd157 | 767 | return NULL; |
5e3dd157 KV |
768 | |
769 | skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); | |
770 | ||
771 | /* FW/HTC requires 4-byte aligned streams */ | |
772 | if (!IS_ALIGNED((unsigned long)skb->data, 4)) | |
7aa7a72a | 773 | ath10k_warn(ar, "Unaligned HTC tx skb\n"); |
5e3dd157 KV |
774 | |
775 | return skb; | |
776 | } | |
777 | ||
778 | int ath10k_htc_start(struct ath10k_htc *htc) | |
779 | { | |
7aa7a72a | 780 | struct ath10k *ar = htc->ar; |
5e3dd157 KV |
781 | struct sk_buff *skb; |
782 | int status = 0; | |
783 | struct ath10k_htc_msg *msg; | |
784 | ||
785 | skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); | |
786 | if (!skb) | |
787 | return -ENOMEM; | |
788 | ||
789 | skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); | |
790 | memset(skb->data, 0, skb->len); | |
791 | ||
792 | msg = (struct ath10k_htc_msg *)skb->data; | |
793 | msg->hdr.message_id = | |
794 | __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); | |
795 | ||
7aa7a72a | 796 | ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); |
5e3dd157 KV |
797 | |
798 | status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); | |
799 | if (status) { | |
800 | kfree_skb(skb); | |
801 | return status; | |
802 | } | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
5e3dd157 | 807 | /* registered target arrival callback from the HIF layer */ |
cd003fad | 808 | int ath10k_htc_init(struct ath10k *ar) |
5e3dd157 | 809 | { |
5e3dd157 | 810 | struct ath10k_htc_ep *ep = NULL; |
cd003fad | 811 | struct ath10k_htc *htc = &ar->htc; |
5e3dd157 KV |
812 | |
813 | spin_lock_init(&htc->tx_lock); | |
814 | ||
5e3dd157 KV |
815 | ath10k_htc_reset_endpoint_states(htc); |
816 | ||
5e3dd157 KV |
817 | htc->ar = ar; |
818 | ||
819 | /* Get HIF default pipe for HTC message exchange */ | |
820 | ep = &htc->endpoint[ATH10K_HTC_EP_0]; | |
821 | ||
5e3dd157 KV |
822 | ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); |
823 | ||
824 | init_completion(&htc->ctl_resp); | |
825 | ||
cd003fad | 826 | return 0; |
5e3dd157 | 827 | } |