Commit | Line | Data |
---|---|---|
bdcd8170 KV |
1 | /* |
2 | * Copyright (c) 2007-2011 Atheros Communications Inc. | |
1b2df407 | 3 | * Copyright (c) 2011-2012 Qualcomm Atheros, Inc. |
bdcd8170 KV |
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" | |
2e1cb23c | 19 | #include "hif.h" |
bdcd8170 KV |
20 | #include "debug.h" |
21 | #include "hif-ops.h" | |
22 | #include <asm/unaligned.h> | |
23 | ||
24 | #define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask)) | |
25 | ||
b29072cc CN |
26 | /* threshold to re-enable Tx bundling for an AC*/ |
27 | #define TX_RESUME_BUNDLE_THRESHOLD 1500 | |
28 | ||
f2f92195 | 29 | /* Functions for Tx credit handling */ |
cb64a610 KV |
30 | static void ath6kl_credit_deposit(struct ath6kl_htc_credit_info *cred_info, |
31 | struct htc_endpoint_credit_dist *ep_dist, | |
32 | int credits) | |
f2f92195 | 33 | { |
02f0d6fc KV |
34 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit deposit ep %d credits %d\n", |
35 | ep_dist->endpoint, credits); | |
36 | ||
f2f92195 KV |
37 | ep_dist->credits += credits; |
38 | ep_dist->cred_assngd += credits; | |
39 | cred_info->cur_free_credits -= credits; | |
40 | } | |
41 | ||
42 | static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, | |
43 | struct list_head *ep_list, | |
44 | int tot_credits) | |
45 | { | |
46 | struct htc_endpoint_credit_dist *cur_ep_dist; | |
47 | int count; | |
48 | ||
02f0d6fc KV |
49 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit init total %d\n", tot_credits); |
50 | ||
f2f92195 KV |
51 | cred_info->cur_free_credits = tot_credits; |
52 | cred_info->total_avail_credits = tot_credits; | |
53 | ||
54 | list_for_each_entry(cur_ep_dist, ep_list, list) { | |
55 | if (cur_ep_dist->endpoint == ENDPOINT_0) | |
56 | continue; | |
57 | ||
58 | cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; | |
59 | ||
60 | if (tot_credits > 4) { | |
61 | if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || | |
62 | (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { | |
cb64a610 KV |
63 | ath6kl_credit_deposit(cred_info, |
64 | cur_ep_dist, | |
65 | cur_ep_dist->cred_min); | |
f2f92195 KV |
66 | cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; |
67 | } | |
68 | } | |
69 | ||
70 | if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { | |
cb64a610 KV |
71 | ath6kl_credit_deposit(cred_info, cur_ep_dist, |
72 | cur_ep_dist->cred_min); | |
f2f92195 KV |
73 | /* |
74 | * Control service is always marked active, it | |
75 | * never goes inactive EVER. | |
76 | */ | |
77 | cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; | |
78 | } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC) | |
79 | /* this is the lowest priority data endpoint */ | |
80 | /* FIXME: this looks fishy, check */ | |
81 | cred_info->lowestpri_ep_dist = cur_ep_dist->list; | |
82 | ||
83 | /* | |
84 | * Streams have to be created (explicit | implicit) for all | |
85 | * kinds of traffic. BE endpoints are also inactive in the | |
86 | * beginning. When BE traffic starts it creates implicit | |
87 | * streams that redistributes credits. | |
88 | * | |
89 | * Note: all other endpoints have minimums set but are | |
90 | * initially given NO credits. credits will be distributed | |
91 | * as traffic activity demands | |
92 | */ | |
93 | } | |
94 | ||
95 | WARN_ON(cred_info->cur_free_credits <= 0); | |
96 | ||
97 | list_for_each_entry(cur_ep_dist, ep_list, list) { | |
98 | if (cur_ep_dist->endpoint == ENDPOINT_0) | |
99 | continue; | |
100 | ||
101 | if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) | |
102 | cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; | |
103 | else { | |
104 | /* | |
105 | * For the remaining data endpoints, we assume that | |
106 | * each cred_per_msg are the same. We use a simple | |
107 | * calculation here, we take the remaining credits | |
108 | * and determine how many max messages this can | |
109 | * cover and then set each endpoint's normal value | |
110 | * equal to 3/4 this amount. | |
111 | */ | |
112 | count = (cred_info->cur_free_credits / | |
113 | cur_ep_dist->cred_per_msg) | |
114 | * cur_ep_dist->cred_per_msg; | |
115 | count = (count * 3) >> 2; | |
116 | count = max(count, cur_ep_dist->cred_per_msg); | |
117 | cur_ep_dist->cred_norm = count; | |
118 | ||
119 | } | |
02f0d6fc KV |
120 | |
121 | ath6kl_dbg(ATH6KL_DBG_CREDIT, | |
122 | "credit ep %d svc_id %d credits %d per_msg %d norm %d min %d\n", | |
123 | cur_ep_dist->endpoint, | |
124 | cur_ep_dist->svc_id, | |
125 | cur_ep_dist->credits, | |
126 | cur_ep_dist->cred_per_msg, | |
127 | cur_ep_dist->cred_norm, | |
128 | cur_ep_dist->cred_min); | |
f2f92195 KV |
129 | } |
130 | } | |
131 | ||
132 | /* initialize and setup credit distribution */ | |
cb64a610 KV |
133 | int ath6kl_credit_setup(void *htc_handle, |
134 | struct ath6kl_htc_credit_info *cred_info) | |
f2f92195 KV |
135 | { |
136 | u16 servicepriority[5]; | |
137 | ||
138 | memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info)); | |
139 | ||
140 | servicepriority[0] = WMI_CONTROL_SVC; /* highest */ | |
141 | servicepriority[1] = WMI_DATA_VO_SVC; | |
142 | servicepriority[2] = WMI_DATA_VI_SVC; | |
143 | servicepriority[3] = WMI_DATA_BE_SVC; | |
144 | servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ | |
145 | ||
146 | /* set priority list */ | |
147 | ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | /* reduce an ep's credits back to a set limit */ | |
cb64a610 KV |
153 | static void ath6kl_credit_reduce(struct ath6kl_htc_credit_info *cred_info, |
154 | struct htc_endpoint_credit_dist *ep_dist, | |
155 | int limit) | |
f2f92195 KV |
156 | { |
157 | int credits; | |
158 | ||
02f0d6fc KV |
159 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit reduce ep %d limit %d\n", |
160 | ep_dist->endpoint, limit); | |
161 | ||
f2f92195 KV |
162 | ep_dist->cred_assngd = limit; |
163 | ||
164 | if (ep_dist->credits <= limit) | |
165 | return; | |
166 | ||
167 | credits = ep_dist->credits - limit; | |
168 | ep_dist->credits -= credits; | |
169 | cred_info->cur_free_credits += credits; | |
170 | } | |
171 | ||
172 | static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info, | |
173 | struct list_head *epdist_list) | |
174 | { | |
05aab177 | 175 | struct htc_endpoint_credit_dist *cur_list; |
f2f92195 | 176 | |
05aab177 KV |
177 | list_for_each_entry(cur_list, epdist_list, list) { |
178 | if (cur_list->endpoint == ENDPOINT_0) | |
f2f92195 KV |
179 | continue; |
180 | ||
05aab177 KV |
181 | if (cur_list->cred_to_dist > 0) { |
182 | cur_list->credits += cur_list->cred_to_dist; | |
183 | cur_list->cred_to_dist = 0; | |
184 | ||
185 | if (cur_list->credits > cur_list->cred_assngd) | |
cb64a610 | 186 | ath6kl_credit_reduce(cred_info, |
05aab177 KV |
187 | cur_list, |
188 | cur_list->cred_assngd); | |
f2f92195 | 189 | |
05aab177 KV |
190 | if (cur_list->credits > cur_list->cred_norm) |
191 | ath6kl_credit_reduce(cred_info, cur_list, | |
192 | cur_list->cred_norm); | |
f2f92195 | 193 | |
05aab177 KV |
194 | if (!(cur_list->dist_flags & HTC_EP_ACTIVE)) { |
195 | if (cur_list->txq_depth == 0) | |
cb64a610 | 196 | ath6kl_credit_reduce(cred_info, |
05aab177 | 197 | cur_list, 0); |
f2f92195 KV |
198 | } |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | /* | |
204 | * HTC has an endpoint that needs credits, ep_dist is the endpoint in | |
205 | * question. | |
206 | */ | |
cb64a610 | 207 | static void ath6kl_credit_seek(struct ath6kl_htc_credit_info *cred_info, |
f2f92195 KV |
208 | struct htc_endpoint_credit_dist *ep_dist) |
209 | { | |
210 | struct htc_endpoint_credit_dist *curdist_list; | |
211 | int credits = 0; | |
212 | int need; | |
213 | ||
214 | if (ep_dist->svc_id == WMI_CONTROL_SVC) | |
215 | goto out; | |
216 | ||
217 | if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || | |
218 | (ep_dist->svc_id == WMI_DATA_VO_SVC)) | |
219 | if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) | |
220 | goto out; | |
221 | ||
222 | /* | |
223 | * For all other services, we follow a simple algorithm of: | |
224 | * | |
225 | * 1. checking the free pool for credits | |
226 | * 2. checking lower priority endpoints for credits to take | |
227 | */ | |
228 | ||
229 | credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); | |
230 | ||
231 | if (credits >= ep_dist->seek_cred) | |
232 | goto out; | |
233 | ||
234 | /* | |
235 | * We don't have enough in the free pool, try taking away from | |
236 | * lower priority services The rule for taking away credits: | |
237 | * | |
238 | * 1. Only take from lower priority endpoints | |
239 | * 2. Only take what is allocated above the minimum (never | |
240 | * starve an endpoint completely) | |
241 | * 3. Only take what you need. | |
242 | */ | |
243 | ||
244 | list_for_each_entry_reverse(curdist_list, | |
245 | &cred_info->lowestpri_ep_dist, | |
246 | list) { | |
247 | if (curdist_list == ep_dist) | |
248 | break; | |
249 | ||
250 | need = ep_dist->seek_cred - cred_info->cur_free_credits; | |
251 | ||
252 | if ((curdist_list->cred_assngd - need) >= | |
253 | curdist_list->cred_min) { | |
254 | /* | |
255 | * The current one has been allocated more than | |
256 | * it's minimum and it has enough credits assigned | |
257 | * above it's minimum to fulfill our need try to | |
258 | * take away just enough to fulfill our need. | |
259 | */ | |
cb64a610 KV |
260 | ath6kl_credit_reduce(cred_info, curdist_list, |
261 | curdist_list->cred_assngd - need); | |
f2f92195 KV |
262 | |
263 | if (cred_info->cur_free_credits >= | |
264 | ep_dist->seek_cred) | |
265 | break; | |
266 | } | |
267 | ||
268 | if (curdist_list->endpoint == ENDPOINT_0) | |
269 | break; | |
270 | } | |
271 | ||
272 | credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); | |
273 | ||
274 | out: | |
275 | /* did we find some credits? */ | |
276 | if (credits) | |
cb64a610 | 277 | ath6kl_credit_deposit(cred_info, ep_dist, credits); |
f2f92195 KV |
278 | |
279 | ep_dist->seek_cred = 0; | |
280 | } | |
281 | ||
282 | /* redistribute credits based on activity change */ | |
cb64a610 KV |
283 | static void ath6kl_credit_redistribute(struct ath6kl_htc_credit_info *info, |
284 | struct list_head *ep_dist_list) | |
f2f92195 KV |
285 | { |
286 | struct htc_endpoint_credit_dist *curdist_list; | |
287 | ||
288 | list_for_each_entry(curdist_list, ep_dist_list, list) { | |
289 | if (curdist_list->endpoint == ENDPOINT_0) | |
290 | continue; | |
291 | ||
292 | if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || | |
293 | (curdist_list->svc_id == WMI_DATA_BE_SVC)) | |
294 | curdist_list->dist_flags |= HTC_EP_ACTIVE; | |
295 | ||
296 | if ((curdist_list->svc_id != WMI_CONTROL_SVC) && | |
297 | !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { | |
298 | if (curdist_list->txq_depth == 0) | |
cb64a610 | 299 | ath6kl_credit_reduce(info, curdist_list, 0); |
f2f92195 | 300 | else |
cb64a610 KV |
301 | ath6kl_credit_reduce(info, |
302 | curdist_list, | |
303 | curdist_list->cred_min); | |
f2f92195 KV |
304 | } |
305 | } | |
306 | } | |
307 | ||
308 | /* | |
309 | * | |
310 | * This function is invoked whenever endpoints require credit | |
311 | * distributions. A lock is held while this function is invoked, this | |
312 | * function shall NOT block. The ep_dist_list is a list of distribution | |
313 | * structures in prioritized order as defined by the call to the | |
314 | * htc_set_credit_dist() api. | |
315 | */ | |
316 | static void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info, | |
317 | struct list_head *ep_dist_list, | |
318 | enum htc_credit_dist_reason reason) | |
319 | { | |
320 | switch (reason) { | |
321 | case HTC_CREDIT_DIST_SEND_COMPLETE: | |
322 | ath6kl_credit_update(cred_info, ep_dist_list); | |
323 | break; | |
324 | case HTC_CREDIT_DIST_ACTIVITY_CHANGE: | |
cb64a610 | 325 | ath6kl_credit_redistribute(cred_info, ep_dist_list); |
f2f92195 KV |
326 | break; |
327 | default: | |
328 | break; | |
329 | } | |
330 | ||
331 | WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); | |
332 | WARN_ON(cred_info->cur_free_credits < 0); | |
333 | } | |
334 | ||
dfa0104c | 335 | static void ath6kl_htc_tx_buf_align(u8 **buf, unsigned long len) |
94e532d1 VT |
336 | { |
337 | u8 *align_addr; | |
338 | ||
339 | if (!IS_ALIGNED((unsigned long) *buf, 4)) { | |
340 | align_addr = PTR_ALIGN(*buf - 4, 4); | |
341 | memmove(align_addr, *buf, len); | |
342 | *buf = align_addr; | |
343 | } | |
344 | } | |
345 | ||
dfa0104c KV |
346 | static void ath6kl_htc_tx_prep_pkt(struct htc_packet *packet, u8 flags, |
347 | int ctrl0, int ctrl1) | |
bdcd8170 KV |
348 | { |
349 | struct htc_frame_hdr *hdr; | |
350 | ||
351 | packet->buf -= HTC_HDR_LENGTH; | |
352 | hdr = (struct htc_frame_hdr *)packet->buf; | |
353 | ||
354 | /* Endianess? */ | |
355 | put_unaligned((u16)packet->act_len, &hdr->payld_len); | |
356 | hdr->flags = flags; | |
357 | hdr->eid = packet->endpoint; | |
358 | hdr->ctrl[0] = ctrl0; | |
359 | hdr->ctrl[1] = ctrl1; | |
360 | } | |
361 | ||
362 | static void htc_reclaim_txctrl_buf(struct htc_target *target, | |
363 | struct htc_packet *pkt) | |
364 | { | |
365 | spin_lock_bh(&target->htc_lock); | |
366 | list_add_tail(&pkt->list, &target->free_ctrl_txbuf); | |
367 | spin_unlock_bh(&target->htc_lock); | |
368 | } | |
369 | ||
370 | static struct htc_packet *htc_get_control_buf(struct htc_target *target, | |
371 | bool tx) | |
372 | { | |
373 | struct htc_packet *packet = NULL; | |
374 | struct list_head *buf_list; | |
375 | ||
376 | buf_list = tx ? &target->free_ctrl_txbuf : &target->free_ctrl_rxbuf; | |
377 | ||
378 | spin_lock_bh(&target->htc_lock); | |
379 | ||
380 | if (list_empty(buf_list)) { | |
381 | spin_unlock_bh(&target->htc_lock); | |
382 | return NULL; | |
383 | } | |
384 | ||
385 | packet = list_first_entry(buf_list, struct htc_packet, list); | |
386 | list_del(&packet->list); | |
387 | spin_unlock_bh(&target->htc_lock); | |
388 | ||
389 | if (tx) | |
390 | packet->buf = packet->buf_start + HTC_HDR_LENGTH; | |
391 | ||
392 | return packet; | |
393 | } | |
394 | ||
395 | static void htc_tx_comp_update(struct htc_target *target, | |
396 | struct htc_endpoint *endpoint, | |
397 | struct htc_packet *packet) | |
398 | { | |
399 | packet->completion = NULL; | |
400 | packet->buf += HTC_HDR_LENGTH; | |
401 | ||
402 | if (!packet->status) | |
403 | return; | |
404 | ||
405 | ath6kl_err("req failed (status:%d, ep:%d, len:%d creds:%d)\n", | |
406 | packet->status, packet->endpoint, packet->act_len, | |
407 | packet->info.tx.cred_used); | |
408 | ||
409 | /* on failure to submit, reclaim credits for this packet */ | |
410 | spin_lock_bh(&target->tx_lock); | |
411 | endpoint->cred_dist.cred_to_dist += | |
412 | packet->info.tx.cred_used; | |
413 | endpoint->cred_dist.txq_depth = get_queue_depth(&endpoint->txq); | |
414 | ||
471e92fd | 415 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx ctxt 0x%p dist 0x%p\n", |
3c370398 | 416 | target->credit_info, &target->cred_dist_list); |
bdcd8170 | 417 | |
3c370398 KV |
418 | ath6kl_credit_distribute(target->credit_info, |
419 | &target->cred_dist_list, | |
420 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
bdcd8170 KV |
421 | |
422 | spin_unlock_bh(&target->tx_lock); | |
423 | } | |
424 | ||
425 | static void htc_tx_complete(struct htc_endpoint *endpoint, | |
426 | struct list_head *txq) | |
427 | { | |
428 | if (list_empty(txq)) | |
429 | return; | |
430 | ||
ebf29c95 | 431 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 432 | "htc tx complete ep %d pkts %d\n", |
bdcd8170 KV |
433 | endpoint->eid, get_queue_depth(txq)); |
434 | ||
435 | ath6kl_tx_complete(endpoint->target->dev->ar, txq); | |
436 | } | |
437 | ||
438 | static void htc_tx_comp_handler(struct htc_target *target, | |
439 | struct htc_packet *packet) | |
440 | { | |
441 | struct htc_endpoint *endpoint = &target->endpoint[packet->endpoint]; | |
442 | struct list_head container; | |
443 | ||
2387f0dc KV |
444 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx complete seqno %d\n", |
445 | packet->info.tx.seqno); | |
446 | ||
bdcd8170 KV |
447 | htc_tx_comp_update(target, endpoint, packet); |
448 | INIT_LIST_HEAD(&container); | |
449 | list_add_tail(&packet->list, &container); | |
450 | /* do completion */ | |
451 | htc_tx_complete(endpoint, &container); | |
452 | } | |
453 | ||
e041c7f9 VT |
454 | static void htc_async_tx_scat_complete(struct htc_target *target, |
455 | struct hif_scatter_req *scat_req) | |
bdcd8170 | 456 | { |
e041c7f9 | 457 | struct htc_endpoint *endpoint; |
bdcd8170 KV |
458 | struct htc_packet *packet; |
459 | struct list_head tx_compq; | |
460 | int i; | |
461 | ||
462 | INIT_LIST_HEAD(&tx_compq); | |
463 | ||
ebf29c95 | 464 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
465 | "htc tx scat complete len %d entries %d\n", |
466 | scat_req->len, scat_req->scat_entries); | |
bdcd8170 KV |
467 | |
468 | if (scat_req->status) | |
469 | ath6kl_err("send scatter req failed: %d\n", scat_req->status); | |
470 | ||
e041c7f9 VT |
471 | packet = scat_req->scat_list[0].packet; |
472 | endpoint = &target->endpoint[packet->endpoint]; | |
473 | ||
bdcd8170 KV |
474 | /* walk through the scatter list and process */ |
475 | for (i = 0; i < scat_req->scat_entries; i++) { | |
476 | packet = scat_req->scat_list[i].packet; | |
477 | if (!packet) { | |
478 | WARN_ON(1); | |
479 | return; | |
480 | } | |
481 | ||
482 | packet->status = scat_req->status; | |
483 | htc_tx_comp_update(target, endpoint, packet); | |
484 | list_add_tail(&packet->list, &tx_compq); | |
485 | } | |
486 | ||
487 | /* free scatter request */ | |
488 | hif_scatter_req_add(target->dev->ar, scat_req); | |
489 | ||
490 | /* complete all packets */ | |
491 | htc_tx_complete(endpoint, &tx_compq); | |
492 | } | |
493 | ||
dfa0104c KV |
494 | static int ath6kl_htc_tx_issue(struct htc_target *target, |
495 | struct htc_packet *packet) | |
bdcd8170 KV |
496 | { |
497 | int status; | |
498 | bool sync = false; | |
499 | u32 padded_len, send_len; | |
500 | ||
501 | if (!packet->completion) | |
502 | sync = true; | |
503 | ||
504 | send_len = packet->act_len + HTC_HDR_LENGTH; | |
505 | ||
5be8824f | 506 | padded_len = CALC_TXRX_PADDED_LEN(target, send_len); |
bdcd8170 | 507 | |
ebf29c95 | 508 | ath6kl_dbg(ATH6KL_DBG_HTC, |
2387f0dc KV |
509 | "htc tx issue len %d seqno %d padded_len %d mbox 0x%X %s\n", |
510 | send_len, packet->info.tx.seqno, padded_len, | |
471e92fd KV |
511 | target->dev->ar->mbox_info.htc_addr, |
512 | sync ? "sync" : "async"); | |
bdcd8170 KV |
513 | |
514 | if (sync) { | |
515 | status = hif_read_write_sync(target->dev->ar, | |
516 | target->dev->ar->mbox_info.htc_addr, | |
517 | packet->buf, padded_len, | |
518 | HIF_WR_SYNC_BLOCK_INC); | |
519 | ||
520 | packet->status = status; | |
65d2bb14 | 521 | packet->buf += HTC_HDR_LENGTH; |
bdcd8170 KV |
522 | } else |
523 | status = hif_write_async(target->dev->ar, | |
524 | target->dev->ar->mbox_info.htc_addr, | |
525 | packet->buf, padded_len, | |
526 | HIF_WR_ASYNC_BLOCK_INC, packet); | |
527 | ||
528 | return status; | |
529 | } | |
530 | ||
531 | static int htc_check_credits(struct htc_target *target, | |
532 | struct htc_endpoint *ep, u8 *flags, | |
533 | enum htc_endpoint_id eid, unsigned int len, | |
534 | int *req_cred) | |
535 | { | |
536 | ||
537 | *req_cred = (len > target->tgt_cred_sz) ? | |
538 | DIV_ROUND_UP(len, target->tgt_cred_sz) : 1; | |
539 | ||
02f0d6fc | 540 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit check need %d got %d\n", |
bdcd8170 KV |
541 | *req_cred, ep->cred_dist.credits); |
542 | ||
543 | if (ep->cred_dist.credits < *req_cred) { | |
544 | if (eid == ENDPOINT_0) | |
545 | return -EINVAL; | |
546 | ||
547 | /* Seek more credits */ | |
548 | ep->cred_dist.seek_cred = *req_cred - ep->cred_dist.credits; | |
549 | ||
cb64a610 | 550 | ath6kl_credit_seek(target->credit_info, &ep->cred_dist); |
bdcd8170 KV |
551 | |
552 | ep->cred_dist.seek_cred = 0; | |
553 | ||
554 | if (ep->cred_dist.credits < *req_cred) { | |
02f0d6fc KV |
555 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
556 | "credit not found for ep %d\n", | |
bdcd8170 KV |
557 | eid); |
558 | return -EINVAL; | |
559 | } | |
560 | } | |
561 | ||
562 | ep->cred_dist.credits -= *req_cred; | |
563 | ep->ep_st.cred_cosumd += *req_cred; | |
564 | ||
565 | /* When we are getting low on credits, ask for more */ | |
566 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
567 | ep->cred_dist.seek_cred = | |
568 | ep->cred_dist.cred_per_msg - ep->cred_dist.credits; | |
569 | ||
cb64a610 | 570 | ath6kl_credit_seek(target->credit_info, &ep->cred_dist); |
bdcd8170 KV |
571 | |
572 | /* see if we were successful in getting more */ | |
573 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
574 | /* tell the target we need credits ASAP! */ | |
575 | *flags |= HTC_FLAGS_NEED_CREDIT_UPDATE; | |
576 | ep->ep_st.cred_low_indicate += 1; | |
02f0d6fc KV |
577 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
578 | "credit we need credits asap\n"); | |
bdcd8170 KV |
579 | } |
580 | } | |
581 | ||
582 | return 0; | |
583 | } | |
584 | ||
dfa0104c KV |
585 | static void ath6kl_htc_tx_pkts_get(struct htc_target *target, |
586 | struct htc_endpoint *endpoint, | |
587 | struct list_head *queue) | |
bdcd8170 KV |
588 | { |
589 | int req_cred; | |
590 | u8 flags; | |
591 | struct htc_packet *packet; | |
592 | unsigned int len; | |
593 | ||
594 | while (true) { | |
595 | ||
596 | flags = 0; | |
597 | ||
598 | if (list_empty(&endpoint->txq)) | |
599 | break; | |
600 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
601 | list); | |
602 | ||
ebf29c95 | 603 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
604 | "htc tx got packet 0x%p queue depth %d\n", |
605 | packet, get_queue_depth(&endpoint->txq)); | |
bdcd8170 | 606 | |
5be8824f | 607 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
608 | packet->act_len + HTC_HDR_LENGTH); |
609 | ||
610 | if (htc_check_credits(target, endpoint, &flags, | |
611 | packet->endpoint, len, &req_cred)) | |
612 | break; | |
613 | ||
614 | /* now we can fully move onto caller's queue */ | |
615 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
616 | list); | |
617 | list_move_tail(&packet->list, queue); | |
618 | ||
619 | /* save the number of credits this packet consumed */ | |
620 | packet->info.tx.cred_used = req_cred; | |
621 | ||
622 | /* all TX packets are handled asynchronously */ | |
623 | packet->completion = htc_tx_comp_handler; | |
624 | packet->context = target; | |
625 | endpoint->ep_st.tx_issued += 1; | |
626 | ||
627 | /* save send flags */ | |
628 | packet->info.tx.flags = flags; | |
629 | packet->info.tx.seqno = endpoint->seqno; | |
630 | endpoint->seqno++; | |
631 | } | |
632 | } | |
633 | ||
634 | /* See if the padded tx length falls on a credit boundary */ | |
635 | static int htc_get_credit_padding(unsigned int cred_sz, int *len, | |
636 | struct htc_endpoint *ep) | |
637 | { | |
638 | int rem_cred, cred_pad; | |
639 | ||
640 | rem_cred = *len % cred_sz; | |
641 | ||
642 | /* No padding needed */ | |
643 | if (!rem_cred) | |
644 | return 0; | |
645 | ||
646 | if (!(ep->conn_flags & HTC_FLGS_TX_BNDL_PAD_EN)) | |
647 | return -1; | |
648 | ||
649 | /* | |
650 | * The transfer consumes a "partial" credit, this | |
651 | * packet cannot be bundled unless we add | |
652 | * additional "dummy" padding (max 255 bytes) to | |
653 | * consume the entire credit. | |
654 | */ | |
655 | cred_pad = *len < cred_sz ? (cred_sz - *len) : rem_cred; | |
656 | ||
657 | if ((cred_pad > 0) && (cred_pad <= 255)) | |
658 | *len += cred_pad; | |
659 | else | |
660 | /* The amount of padding is too large, send as non-bundled */ | |
661 | return -1; | |
662 | ||
663 | return cred_pad; | |
664 | } | |
665 | ||
dfa0104c KV |
666 | static int ath6kl_htc_tx_setup_scat_list(struct htc_target *target, |
667 | struct htc_endpoint *endpoint, | |
668 | struct hif_scatter_req *scat_req, | |
669 | int n_scat, | |
670 | struct list_head *queue) | |
bdcd8170 KV |
671 | { |
672 | struct htc_packet *packet; | |
673 | int i, len, rem_scat, cred_pad; | |
674 | int status = 0; | |
05aab177 | 675 | u8 flags; |
bdcd8170 | 676 | |
3b2f5e51 | 677 | rem_scat = target->max_tx_bndl_sz; |
bdcd8170 KV |
678 | |
679 | for (i = 0; i < n_scat; i++) { | |
680 | scat_req->scat_list[i].packet = NULL; | |
681 | ||
682 | if (list_empty(queue)) | |
683 | break; | |
684 | ||
685 | packet = list_first_entry(queue, struct htc_packet, list); | |
5be8824f | 686 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
687 | packet->act_len + HTC_HDR_LENGTH); |
688 | ||
689 | cred_pad = htc_get_credit_padding(target->tgt_cred_sz, | |
690 | &len, endpoint); | |
f7a7e7ae | 691 | if (cred_pad < 0 || rem_scat < len) { |
bdcd8170 KV |
692 | status = -ENOSPC; |
693 | break; | |
694 | } | |
695 | ||
696 | rem_scat -= len; | |
697 | /* now remove it from the queue */ | |
bdcd8170 KV |
698 | list_del(&packet->list); |
699 | ||
700 | scat_req->scat_list[i].packet = packet; | |
701 | /* prepare packet and flag message as part of a send bundle */ | |
05aab177 KV |
702 | flags = packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE; |
703 | ath6kl_htc_tx_prep_pkt(packet, flags, | |
96f1fadc | 704 | cred_pad, packet->info.tx.seqno); |
94e532d1 | 705 | /* Make sure the buffer is 4-byte aligned */ |
dfa0104c KV |
706 | ath6kl_htc_tx_buf_align(&packet->buf, |
707 | packet->act_len + HTC_HDR_LENGTH); | |
bdcd8170 KV |
708 | scat_req->scat_list[i].buf = packet->buf; |
709 | scat_req->scat_list[i].len = len; | |
710 | ||
711 | scat_req->len += len; | |
712 | scat_req->scat_entries++; | |
ebf29c95 | 713 | ath6kl_dbg(ATH6KL_DBG_HTC, |
2387f0dc KV |
714 | "htc tx adding (%d) pkt 0x%p seqno %d len %d remaining %d\n", |
715 | i, packet, packet->info.tx.seqno, len, rem_scat); | |
bdcd8170 KV |
716 | } |
717 | ||
718 | /* Roll back scatter setup in case of any failure */ | |
f7a7e7ae | 719 | if (scat_req->scat_entries < HTC_MIN_HTC_MSGS_TO_BUNDLE) { |
bdcd8170 KV |
720 | for (i = scat_req->scat_entries - 1; i >= 0; i--) { |
721 | packet = scat_req->scat_list[i].packet; | |
722 | if (packet) { | |
723 | packet->buf += HTC_HDR_LENGTH; | |
724 | list_add(&packet->list, queue); | |
725 | } | |
726 | } | |
f7a7e7ae | 727 | return -EAGAIN; |
bdcd8170 KV |
728 | } |
729 | ||
f7a7e7ae | 730 | return status; |
bdcd8170 KV |
731 | } |
732 | ||
733 | /* | |
dfa0104c KV |
734 | * Drain a queue and send as bundles this function may return without fully |
735 | * draining the queue when | |
bdcd8170 KV |
736 | * |
737 | * 1. scatter resources are exhausted | |
738 | * 2. a message that will consume a partial credit will stop the | |
739 | * bundling process early | |
740 | * 3. we drop below the minimum number of messages for a bundle | |
741 | */ | |
dfa0104c KV |
742 | static void ath6kl_htc_tx_bundle(struct htc_endpoint *endpoint, |
743 | struct list_head *queue, | |
744 | int *sent_bundle, int *n_bundle_pkts) | |
bdcd8170 KV |
745 | { |
746 | struct htc_target *target = endpoint->target; | |
747 | struct hif_scatter_req *scat_req = NULL; | |
bdcd8170 | 748 | int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0; |
f7a7e7ae | 749 | int status; |
b29072cc CN |
750 | u32 txb_mask; |
751 | u8 ac = WMM_NUM_AC; | |
752 | ||
753 | if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) || | |
96f1fadc | 754 | (WMI_CONTROL_SVC != endpoint->svc_id)) |
b29072cc | 755 | ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
bdcd8170 | 756 | |
bdcd8170 | 757 | while (true) { |
f7a7e7ae | 758 | status = 0; |
bdcd8170 KV |
759 | n_scat = get_queue_depth(queue); |
760 | n_scat = min(n_scat, target->msg_per_bndl_max); | |
761 | ||
762 | if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE) | |
763 | /* not enough to bundle */ | |
764 | break; | |
765 | ||
766 | scat_req = hif_scatter_req_get(target->dev->ar); | |
767 | ||
768 | if (!scat_req) { | |
769 | /* no scatter resources */ | |
ebf29c95 | 770 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 771 | "htc tx no more scatter resources\n"); |
bdcd8170 KV |
772 | break; |
773 | } | |
774 | ||
b29072cc CN |
775 | if ((ac < WMM_NUM_AC) && (ac != WMM_AC_BK)) { |
776 | if (WMM_AC_BE == ac) | |
777 | /* | |
778 | * BE, BK have priorities and bit | |
779 | * positions reversed | |
780 | */ | |
781 | txb_mask = (1 << WMM_AC_BK); | |
782 | else | |
783 | /* | |
784 | * any AC with priority lower than | |
785 | * itself | |
786 | */ | |
787 | txb_mask = ((1 << ac) - 1); | |
788 | /* | |
789 | * when the scatter request resources drop below a | |
790 | * certain threshold, disable Tx bundling for all | |
791 | * AC's with priority lower than the current requesting | |
792 | * AC. Otherwise re-enable Tx bundling for them | |
793 | */ | |
794 | if (scat_req->scat_q_depth < ATH6KL_SCATTER_REQS) | |
795 | target->tx_bndl_mask &= ~txb_mask; | |
796 | else | |
797 | target->tx_bndl_mask |= txb_mask; | |
798 | } | |
799 | ||
471e92fd | 800 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx pkts to scatter: %d\n", |
bdcd8170 KV |
801 | n_scat); |
802 | ||
803 | scat_req->len = 0; | |
804 | scat_req->scat_entries = 0; | |
805 | ||
dfa0104c KV |
806 | status = ath6kl_htc_tx_setup_scat_list(target, endpoint, |
807 | scat_req, n_scat, | |
808 | queue); | |
f7a7e7ae | 809 | if (status == -EAGAIN) { |
bdcd8170 KV |
810 | hif_scatter_req_add(target->dev->ar, scat_req); |
811 | break; | |
812 | } | |
813 | ||
814 | /* send path is always asynchronous */ | |
815 | scat_req->complete = htc_async_tx_scat_complete; | |
bdcd8170 KV |
816 | n_sent_bundle++; |
817 | tot_pkts_bundle += scat_req->scat_entries; | |
818 | ||
ebf29c95 | 819 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 820 | "htc tx scatter bytes %d entries %d\n", |
bdcd8170 | 821 | scat_req->len, scat_req->scat_entries); |
8e8ddb2b | 822 | ath6kl_hif_submit_scat_req(target->dev, scat_req, false); |
f7a7e7ae VT |
823 | |
824 | if (status) | |
825 | break; | |
bdcd8170 KV |
826 | } |
827 | ||
828 | *sent_bundle = n_sent_bundle; | |
829 | *n_bundle_pkts = tot_pkts_bundle; | |
471e92fd KV |
830 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx bundle sent %d pkts\n", |
831 | n_sent_bundle); | |
bdcd8170 KV |
832 | |
833 | return; | |
834 | } | |
835 | ||
dfa0104c KV |
836 | static void ath6kl_htc_tx_from_queue(struct htc_target *target, |
837 | struct htc_endpoint *endpoint) | |
bdcd8170 KV |
838 | { |
839 | struct list_head txq; | |
840 | struct htc_packet *packet; | |
841 | int bundle_sent; | |
842 | int n_pkts_bundle; | |
b29072cc | 843 | u8 ac = WMM_NUM_AC; |
bdcd8170 KV |
844 | |
845 | spin_lock_bh(&target->tx_lock); | |
846 | ||
847 | endpoint->tx_proc_cnt++; | |
848 | if (endpoint->tx_proc_cnt > 1) { | |
849 | endpoint->tx_proc_cnt--; | |
850 | spin_unlock_bh(&target->tx_lock); | |
471e92fd | 851 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx busy\n"); |
bdcd8170 KV |
852 | return; |
853 | } | |
854 | ||
855 | /* | |
856 | * drain the endpoint TX queue for transmission as long | |
857 | * as we have enough credits. | |
858 | */ | |
859 | INIT_LIST_HEAD(&txq); | |
860 | ||
b29072cc | 861 | if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) || |
96f1fadc | 862 | (WMI_CONTROL_SVC != endpoint->svc_id)) |
b29072cc CN |
863 | ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
864 | ||
bdcd8170 KV |
865 | while (true) { |
866 | ||
867 | if (list_empty(&endpoint->txq)) | |
868 | break; | |
869 | ||
dfa0104c | 870 | ath6kl_htc_tx_pkts_get(target, endpoint, &txq); |
bdcd8170 KV |
871 | |
872 | if (list_empty(&txq)) | |
873 | break; | |
874 | ||
875 | spin_unlock_bh(&target->tx_lock); | |
876 | ||
877 | bundle_sent = 0; | |
878 | n_pkts_bundle = 0; | |
879 | ||
880 | while (true) { | |
881 | /* try to send a bundle on each pass */ | |
b29072cc | 882 | if ((target->tx_bndl_mask) && |
bdcd8170 KV |
883 | (get_queue_depth(&txq) >= |
884 | HTC_MIN_HTC_MSGS_TO_BUNDLE)) { | |
885 | int temp1 = 0, temp2 = 0; | |
886 | ||
b29072cc CN |
887 | /* check if bundling is enabled for an AC */ |
888 | if (target->tx_bndl_mask & (1 << ac)) { | |
889 | ath6kl_htc_tx_bundle(endpoint, &txq, | |
890 | &temp1, &temp2); | |
891 | bundle_sent += temp1; | |
892 | n_pkts_bundle += temp2; | |
893 | } | |
bdcd8170 KV |
894 | } |
895 | ||
896 | if (list_empty(&txq)) | |
897 | break; | |
898 | ||
899 | packet = list_first_entry(&txq, struct htc_packet, | |
900 | list); | |
901 | list_del(&packet->list); | |
902 | ||
dfa0104c KV |
903 | ath6kl_htc_tx_prep_pkt(packet, packet->info.tx.flags, |
904 | 0, packet->info.tx.seqno); | |
905 | ath6kl_htc_tx_issue(target, packet); | |
bdcd8170 KV |
906 | } |
907 | ||
908 | spin_lock_bh(&target->tx_lock); | |
909 | ||
910 | endpoint->ep_st.tx_bundles += bundle_sent; | |
911 | endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle; | |
b29072cc CN |
912 | |
913 | /* | |
914 | * if an AC has bundling disabled and no tx bundling | |
915 | * has occured continously for a certain number of TX, | |
916 | * enable tx bundling for this AC | |
917 | */ | |
918 | if (!bundle_sent) { | |
919 | if (!(target->tx_bndl_mask & (1 << ac)) && | |
96f1fadc | 920 | (ac < WMM_NUM_AC)) { |
b29072cc CN |
921 | if (++target->ac_tx_count[ac] >= |
922 | TX_RESUME_BUNDLE_THRESHOLD) { | |
923 | target->ac_tx_count[ac] = 0; | |
924 | target->tx_bndl_mask |= (1 << ac); | |
925 | } | |
926 | } | |
927 | } else { | |
928 | /* tx bundling will reset the counter */ | |
929 | if (ac < WMM_NUM_AC) | |
930 | target->ac_tx_count[ac] = 0; | |
931 | } | |
bdcd8170 KV |
932 | } |
933 | ||
934 | endpoint->tx_proc_cnt = 0; | |
935 | spin_unlock_bh(&target->tx_lock); | |
936 | } | |
937 | ||
dfa0104c KV |
938 | static bool ath6kl_htc_tx_try(struct htc_target *target, |
939 | struct htc_endpoint *endpoint, | |
940 | struct htc_packet *tx_pkt) | |
bdcd8170 KV |
941 | { |
942 | struct htc_ep_callbacks ep_cb; | |
943 | int txq_depth; | |
944 | bool overflow = false; | |
945 | ||
946 | ep_cb = endpoint->ep_cb; | |
947 | ||
948 | spin_lock_bh(&target->tx_lock); | |
949 | txq_depth = get_queue_depth(&endpoint->txq); | |
950 | spin_unlock_bh(&target->tx_lock); | |
951 | ||
952 | if (txq_depth >= endpoint->max_txq_depth) | |
953 | overflow = true; | |
954 | ||
955 | if (overflow) | |
ebf29c95 | 956 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd KV |
957 | "htc tx overflow ep %d depth %d max %d\n", |
958 | endpoint->eid, txq_depth, | |
bdcd8170 KV |
959 | endpoint->max_txq_depth); |
960 | ||
961 | if (overflow && ep_cb.tx_full) { | |
bdcd8170 KV |
962 | if (ep_cb.tx_full(endpoint->target, tx_pkt) == |
963 | HTC_SEND_FULL_DROP) { | |
964 | endpoint->ep_st.tx_dropped += 1; | |
965 | return false; | |
966 | } | |
967 | } | |
968 | ||
969 | spin_lock_bh(&target->tx_lock); | |
970 | list_add_tail(&tx_pkt->list, &endpoint->txq); | |
971 | spin_unlock_bh(&target->tx_lock); | |
972 | ||
dfa0104c | 973 | ath6kl_htc_tx_from_queue(target, endpoint); |
bdcd8170 KV |
974 | |
975 | return true; | |
976 | } | |
977 | ||
978 | static void htc_chk_ep_txq(struct htc_target *target) | |
979 | { | |
980 | struct htc_endpoint *endpoint; | |
981 | struct htc_endpoint_credit_dist *cred_dist; | |
982 | ||
983 | /* | |
984 | * Run through the credit distribution list to see if there are | |
985 | * packets queued. NOTE: no locks need to be taken since the | |
986 | * distribution list is not dynamic (cannot be re-ordered) and we | |
987 | * are not modifying any state. | |
988 | */ | |
989 | list_for_each_entry(cred_dist, &target->cred_dist_list, list) { | |
e8c39790 | 990 | endpoint = cred_dist->htc_ep; |
bdcd8170 KV |
991 | |
992 | spin_lock_bh(&target->tx_lock); | |
993 | if (!list_empty(&endpoint->txq)) { | |
ebf29c95 | 994 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 995 | "htc creds ep %d credits %d pkts %d\n", |
bdcd8170 KV |
996 | cred_dist->endpoint, |
997 | endpoint->cred_dist.credits, | |
998 | get_queue_depth(&endpoint->txq)); | |
999 | spin_unlock_bh(&target->tx_lock); | |
1000 | /* | |
1001 | * Try to start the stalled queue, this list is | |
1002 | * ordered by priority. If there are credits | |
1003 | * available the highest priority queue will get a | |
1004 | * chance to reclaim credits from lower priority | |
1005 | * ones. | |
1006 | */ | |
dfa0104c | 1007 | ath6kl_htc_tx_from_queue(target, endpoint); |
bdcd8170 KV |
1008 | spin_lock_bh(&target->tx_lock); |
1009 | } | |
1010 | spin_unlock_bh(&target->tx_lock); | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | static int htc_setup_tx_complete(struct htc_target *target) | |
1015 | { | |
1016 | struct htc_packet *send_pkt = NULL; | |
1017 | int status; | |
1018 | ||
1019 | send_pkt = htc_get_control_buf(target, true); | |
1020 | ||
1021 | if (!send_pkt) | |
1022 | return -ENOMEM; | |
1023 | ||
1024 | if (target->htc_tgt_ver >= HTC_VERSION_2P1) { | |
1025 | struct htc_setup_comp_ext_msg *setup_comp_ext; | |
1026 | u32 flags = 0; | |
1027 | ||
1028 | setup_comp_ext = | |
1029 | (struct htc_setup_comp_ext_msg *)send_pkt->buf; | |
1030 | memset(setup_comp_ext, 0, sizeof(*setup_comp_ext)); | |
1031 | setup_comp_ext->msg_id = | |
1032 | cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID); | |
1033 | ||
1034 | if (target->msg_per_bndl_max > 0) { | |
1035 | /* Indicate HTC bundling to the target */ | |
1036 | flags |= HTC_SETUP_COMP_FLG_RX_BNDL_EN; | |
1037 | setup_comp_ext->msg_per_rxbndl = | |
1038 | target->msg_per_bndl_max; | |
1039 | } | |
1040 | ||
1041 | memcpy(&setup_comp_ext->flags, &flags, | |
1042 | sizeof(setup_comp_ext->flags)); | |
1043 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp_ext, | |
96f1fadc KV |
1044 | sizeof(struct htc_setup_comp_ext_msg), |
1045 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
bdcd8170 KV |
1046 | |
1047 | } else { | |
1048 | struct htc_setup_comp_msg *setup_comp; | |
1049 | setup_comp = (struct htc_setup_comp_msg *)send_pkt->buf; | |
1050 | memset(setup_comp, 0, sizeof(struct htc_setup_comp_msg)); | |
1051 | setup_comp->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_ID); | |
1052 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp, | |
96f1fadc KV |
1053 | sizeof(struct htc_setup_comp_msg), |
1054 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
bdcd8170 KV |
1055 | } |
1056 | ||
1057 | /* we want synchronous operation */ | |
1058 | send_pkt->completion = NULL; | |
dfa0104c KV |
1059 | ath6kl_htc_tx_prep_pkt(send_pkt, 0, 0, 0); |
1060 | status = ath6kl_htc_tx_issue(target, send_pkt); | |
bdcd8170 KV |
1061 | |
1062 | if (send_pkt != NULL) | |
1063 | htc_reclaim_txctrl_buf(target, send_pkt); | |
1064 | ||
1065 | return status; | |
1066 | } | |
1067 | ||
ad226ec2 | 1068 | void ath6kl_htc_set_credit_dist(struct htc_target *target, |
3c370398 | 1069 | struct ath6kl_htc_credit_info *credit_info, |
ad226ec2 | 1070 | u16 srvc_pri_order[], int list_len) |
bdcd8170 KV |
1071 | { |
1072 | struct htc_endpoint *endpoint; | |
1073 | int i, ep; | |
1074 | ||
3c370398 | 1075 | target->credit_info = credit_info; |
bdcd8170 KV |
1076 | |
1077 | list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list, | |
1078 | &target->cred_dist_list); | |
1079 | ||
1080 | for (i = 0; i < list_len; i++) { | |
1081 | for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { | |
1082 | endpoint = &target->endpoint[ep]; | |
1083 | if (endpoint->svc_id == srvc_pri_order[i]) { | |
1084 | list_add_tail(&endpoint->cred_dist.list, | |
1085 | &target->cred_dist_list); | |
1086 | break; | |
1087 | } | |
1088 | } | |
1089 | if (ep >= ENDPOINT_MAX) { | |
1090 | WARN_ON(1); | |
1091 | return; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | ||
ad226ec2 | 1096 | int ath6kl_htc_tx(struct htc_target *target, struct htc_packet *packet) |
bdcd8170 KV |
1097 | { |
1098 | struct htc_endpoint *endpoint; | |
1099 | struct list_head queue; | |
1100 | ||
ebf29c95 | 1101 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1102 | "htc tx ep id %d buf 0x%p len %d\n", |
bdcd8170 KV |
1103 | packet->endpoint, packet->buf, packet->act_len); |
1104 | ||
1105 | if (packet->endpoint >= ENDPOINT_MAX) { | |
1106 | WARN_ON(1); | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | ||
1110 | endpoint = &target->endpoint[packet->endpoint]; | |
1111 | ||
dfa0104c | 1112 | if (!ath6kl_htc_tx_try(target, endpoint, packet)) { |
bdcd8170 KV |
1113 | packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ? |
1114 | -ECANCELED : -ENOSPC; | |
1115 | INIT_LIST_HEAD(&queue); | |
1116 | list_add(&packet->list, &queue); | |
1117 | htc_tx_complete(endpoint, &queue); | |
1118 | } | |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | /* flush endpoint TX queue */ | |
ad226ec2 KV |
1124 | void ath6kl_htc_flush_txep(struct htc_target *target, |
1125 | enum htc_endpoint_id eid, u16 tag) | |
bdcd8170 KV |
1126 | { |
1127 | struct htc_packet *packet, *tmp_pkt; | |
1128 | struct list_head discard_q, container; | |
1129 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
1130 | ||
1131 | if (!endpoint->svc_id) { | |
1132 | WARN_ON(1); | |
1133 | return; | |
1134 | } | |
1135 | ||
1136 | /* initialize the discard queue */ | |
1137 | INIT_LIST_HEAD(&discard_q); | |
1138 | ||
1139 | spin_lock_bh(&target->tx_lock); | |
1140 | ||
1141 | list_for_each_entry_safe(packet, tmp_pkt, &endpoint->txq, list) { | |
1142 | if ((tag == HTC_TX_PACKET_TAG_ALL) || | |
1143 | (tag == packet->info.tx.tag)) | |
1144 | list_move_tail(&packet->list, &discard_q); | |
1145 | } | |
1146 | ||
1147 | spin_unlock_bh(&target->tx_lock); | |
1148 | ||
1149 | list_for_each_entry_safe(packet, tmp_pkt, &discard_q, list) { | |
1150 | packet->status = -ECANCELED; | |
1151 | list_del(&packet->list); | |
ebf29c95 | 1152 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
1153 | "htc tx flushing pkt 0x%p len %d ep %d tag 0x%x\n", |
1154 | packet, packet->act_len, | |
1155 | packet->endpoint, packet->info.tx.tag); | |
bdcd8170 KV |
1156 | |
1157 | INIT_LIST_HEAD(&container); | |
1158 | list_add_tail(&packet->list, &container); | |
1159 | htc_tx_complete(endpoint, &container); | |
1160 | } | |
1161 | ||
1162 | } | |
1163 | ||
ad226ec2 | 1164 | static void ath6kl_htc_flush_txep_all(struct htc_target *target) |
bdcd8170 KV |
1165 | { |
1166 | struct htc_endpoint *endpoint; | |
1167 | int i; | |
1168 | ||
1169 | dump_cred_dist_stats(target); | |
1170 | ||
1171 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
1172 | endpoint = &target->endpoint[i]; | |
1173 | if (endpoint->svc_id == 0) | |
1174 | /* not in use.. */ | |
1175 | continue; | |
ad226ec2 | 1176 | ath6kl_htc_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL); |
bdcd8170 KV |
1177 | } |
1178 | } | |
1179 | ||
ad226ec2 KV |
1180 | void ath6kl_htc_indicate_activity_change(struct htc_target *target, |
1181 | enum htc_endpoint_id eid, bool active) | |
bdcd8170 KV |
1182 | { |
1183 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
1184 | bool dist = false; | |
1185 | ||
1186 | if (endpoint->svc_id == 0) { | |
1187 | WARN_ON(1); | |
1188 | return; | |
1189 | } | |
1190 | ||
1191 | spin_lock_bh(&target->tx_lock); | |
1192 | ||
1193 | if (active) { | |
1194 | if (!(endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE)) { | |
1195 | endpoint->cred_dist.dist_flags |= HTC_EP_ACTIVE; | |
1196 | dist = true; | |
1197 | } | |
1198 | } else { | |
1199 | if (endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE) { | |
1200 | endpoint->cred_dist.dist_flags &= ~HTC_EP_ACTIVE; | |
1201 | dist = true; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | if (dist) { | |
1206 | endpoint->cred_dist.txq_depth = | |
1207 | get_queue_depth(&endpoint->txq); | |
1208 | ||
471e92fd KV |
1209 | ath6kl_dbg(ATH6KL_DBG_HTC, |
1210 | "htc tx activity ctxt 0x%p dist 0x%p\n", | |
3c370398 | 1211 | target->credit_info, &target->cred_dist_list); |
bdcd8170 | 1212 | |
3c370398 | 1213 | ath6kl_credit_distribute(target->credit_info, |
fa99e963 KV |
1214 | &target->cred_dist_list, |
1215 | HTC_CREDIT_DIST_ACTIVITY_CHANGE); | |
bdcd8170 KV |
1216 | } |
1217 | ||
1218 | spin_unlock_bh(&target->tx_lock); | |
1219 | ||
1220 | if (dist && !active) | |
1221 | htc_chk_ep_txq(target); | |
1222 | } | |
1223 | ||
1224 | /* HTC Rx */ | |
1225 | ||
689def90 KV |
1226 | static inline void ath6kl_htc_rx_update_stats(struct htc_endpoint *endpoint, |
1227 | int n_look_ahds) | |
bdcd8170 KV |
1228 | { |
1229 | endpoint->ep_st.rx_pkts++; | |
1230 | if (n_look_ahds == 1) | |
1231 | endpoint->ep_st.rx_lkahds++; | |
1232 | else if (n_look_ahds > 1) | |
1233 | endpoint->ep_st.rx_bundle_lkahd++; | |
1234 | } | |
1235 | ||
1236 | static inline bool htc_valid_rx_frame_len(struct htc_target *target, | |
1237 | enum htc_endpoint_id eid, int len) | |
1238 | { | |
1239 | return (eid == target->dev->ar->ctrl_ep) ? | |
1240 | len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE; | |
1241 | } | |
1242 | ||
1243 | static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet) | |
1244 | { | |
1245 | struct list_head queue; | |
1246 | ||
1247 | INIT_LIST_HEAD(&queue); | |
1248 | list_add_tail(&packet->list, &queue); | |
ad226ec2 | 1249 | return ath6kl_htc_add_rxbuf_multiple(target, &queue); |
bdcd8170 KV |
1250 | } |
1251 | ||
1252 | static void htc_reclaim_rxbuf(struct htc_target *target, | |
1253 | struct htc_packet *packet, | |
1254 | struct htc_endpoint *ep) | |
1255 | { | |
1256 | if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) { | |
1257 | htc_rxpkt_reset(packet); | |
1258 | packet->status = -ECANCELED; | |
1259 | ep->ep_cb.rx(ep->target, packet); | |
1260 | } else { | |
1261 | htc_rxpkt_reset(packet); | |
1262 | htc_add_rxbuf((void *)(target), packet); | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | static void reclaim_rx_ctrl_buf(struct htc_target *target, | |
1267 | struct htc_packet *packet) | |
1268 | { | |
1269 | spin_lock_bh(&target->htc_lock); | |
1270 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
1271 | spin_unlock_bh(&target->htc_lock); | |
1272 | } | |
1273 | ||
689def90 KV |
1274 | static int ath6kl_htc_rx_packet(struct htc_target *target, |
1275 | struct htc_packet *packet, | |
1276 | u32 rx_len) | |
bdcd8170 KV |
1277 | { |
1278 | struct ath6kl_device *dev = target->dev; | |
1279 | u32 padded_len; | |
1280 | int status; | |
1281 | ||
5be8824f | 1282 | padded_len = CALC_TXRX_PADDED_LEN(target, rx_len); |
bdcd8170 KV |
1283 | |
1284 | if (padded_len > packet->buf_len) { | |
471e92fd | 1285 | ath6kl_err("not enough receive space for packet - padlen %d recvlen %d bufferlen %d\n", |
bdcd8170 KV |
1286 | padded_len, rx_len, packet->buf_len); |
1287 | return -ENOMEM; | |
1288 | } | |
1289 | ||
ebf29c95 | 1290 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1291 | "htc rx 0x%p hdr x%x len %d mbox 0x%x\n", |
bdcd8170 | 1292 | packet, packet->info.rx.exp_hdr, |
471e92fd | 1293 | padded_len, dev->ar->mbox_info.htc_addr); |
bdcd8170 KV |
1294 | |
1295 | status = hif_read_write_sync(dev->ar, | |
1296 | dev->ar->mbox_info.htc_addr, | |
1297 | packet->buf, padded_len, | |
1298 | HIF_RD_SYNC_BLOCK_FIX); | |
1299 | ||
1300 | packet->status = status; | |
1301 | ||
1302 | return status; | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * optimization for recv packets, we can indicate a | |
1307 | * "hint" that there are more single-packets to fetch | |
1308 | * on this endpoint. | |
1309 | */ | |
689def90 KV |
1310 | static void ath6kl_htc_rx_set_indicate(u32 lk_ahd, |
1311 | struct htc_endpoint *endpoint, | |
1312 | struct htc_packet *packet) | |
bdcd8170 KV |
1313 | { |
1314 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)&lk_ahd; | |
1315 | ||
1316 | if (htc_hdr->eid == packet->endpoint) { | |
1317 | if (!list_empty(&endpoint->rx_bufq)) | |
1318 | packet->info.rx.indicat_flags |= | |
1319 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
1320 | } | |
1321 | } | |
1322 | ||
689def90 | 1323 | static void ath6kl_htc_rx_chk_water_mark(struct htc_endpoint *endpoint) |
bdcd8170 KV |
1324 | { |
1325 | struct htc_ep_callbacks ep_cb = endpoint->ep_cb; | |
1326 | ||
1327 | if (ep_cb.rx_refill_thresh > 0) { | |
1328 | spin_lock_bh(&endpoint->target->rx_lock); | |
1329 | if (get_queue_depth(&endpoint->rx_bufq) | |
1330 | < ep_cb.rx_refill_thresh) { | |
1331 | spin_unlock_bh(&endpoint->target->rx_lock); | |
1332 | ep_cb.rx_refill(endpoint->target, endpoint->eid); | |
1333 | return; | |
1334 | } | |
1335 | spin_unlock_bh(&endpoint->target->rx_lock); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | /* This function is called with rx_lock held */ | |
689def90 KV |
1340 | static int ath6kl_htc_rx_setup(struct htc_target *target, |
1341 | struct htc_endpoint *ep, | |
1342 | u32 *lk_ahds, struct list_head *queue, int n_msg) | |
bdcd8170 KV |
1343 | { |
1344 | struct htc_packet *packet; | |
1345 | /* FIXME: type of lk_ahds can't be right */ | |
1346 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)lk_ahds; | |
1347 | struct htc_ep_callbacks ep_cb; | |
1348 | int status = 0, j, full_len; | |
1349 | bool no_recycle; | |
1350 | ||
5be8824f | 1351 | full_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
1352 | le16_to_cpu(htc_hdr->payld_len) + |
1353 | sizeof(*htc_hdr)); | |
1354 | ||
1355 | if (!htc_valid_rx_frame_len(target, ep->eid, full_len)) { | |
1356 | ath6kl_warn("Rx buffer requested with invalid length\n"); | |
1357 | return -EINVAL; | |
1358 | } | |
1359 | ||
1360 | ep_cb = ep->ep_cb; | |
1361 | for (j = 0; j < n_msg; j++) { | |
1362 | ||
1363 | /* | |
1364 | * Reset flag, any packets allocated using the | |
1365 | * rx_alloc() API cannot be recycled on | |
1366 | * cleanup,they must be explicitly returned. | |
1367 | */ | |
1368 | no_recycle = false; | |
1369 | ||
1370 | if (ep_cb.rx_allocthresh && | |
1371 | (full_len > ep_cb.rx_alloc_thresh)) { | |
1372 | ep->ep_st.rx_alloc_thresh_hit += 1; | |
1373 | ep->ep_st.rxalloc_thresh_byte += | |
1374 | le16_to_cpu(htc_hdr->payld_len); | |
1375 | ||
1376 | spin_unlock_bh(&target->rx_lock); | |
1377 | no_recycle = true; | |
1378 | ||
1379 | packet = ep_cb.rx_allocthresh(ep->target, ep->eid, | |
1380 | full_len); | |
1381 | spin_lock_bh(&target->rx_lock); | |
1382 | } else { | |
1383 | /* refill handler is being used */ | |
1384 | if (list_empty(&ep->rx_bufq)) { | |
1385 | if (ep_cb.rx_refill) { | |
1386 | spin_unlock_bh(&target->rx_lock); | |
1387 | ep_cb.rx_refill(ep->target, ep->eid); | |
1388 | spin_lock_bh(&target->rx_lock); | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | if (list_empty(&ep->rx_bufq)) | |
1393 | packet = NULL; | |
1394 | else { | |
1395 | packet = list_first_entry(&ep->rx_bufq, | |
1396 | struct htc_packet, list); | |
1397 | list_del(&packet->list); | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | if (!packet) { | |
1402 | target->rx_st_flags |= HTC_RECV_WAIT_BUFFERS; | |
1403 | target->ep_waiting = ep->eid; | |
1404 | return -ENOSPC; | |
1405 | } | |
1406 | ||
1407 | /* clear flags */ | |
1408 | packet->info.rx.rx_flags = 0; | |
1409 | packet->info.rx.indicat_flags = 0; | |
1410 | packet->status = 0; | |
1411 | ||
1412 | if (no_recycle) | |
1413 | /* | |
1414 | * flag that these packets cannot be | |
1415 | * recycled, they have to be returned to | |
1416 | * the user | |
1417 | */ | |
1418 | packet->info.rx.rx_flags |= HTC_RX_PKT_NO_RECYCLE; | |
1419 | ||
1420 | /* Caller needs to free this upon any failure */ | |
1421 | list_add_tail(&packet->list, queue); | |
1422 | ||
1423 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
1424 | status = -ECANCELED; | |
1425 | break; | |
1426 | } | |
1427 | ||
1428 | if (j) { | |
1429 | packet->info.rx.rx_flags |= HTC_RX_PKT_REFRESH_HDR; | |
1430 | packet->info.rx.exp_hdr = 0xFFFFFFFF; | |
1431 | } else | |
1432 | /* set expected look ahead */ | |
1433 | packet->info.rx.exp_hdr = *lk_ahds; | |
1434 | ||
1435 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + | |
1436 | HTC_HDR_LENGTH; | |
1437 | } | |
1438 | ||
1439 | return status; | |
1440 | } | |
1441 | ||
689def90 KV |
1442 | static int ath6kl_htc_rx_alloc(struct htc_target *target, |
1443 | u32 lk_ahds[], int msg, | |
1444 | struct htc_endpoint *endpoint, | |
1445 | struct list_head *queue) | |
bdcd8170 KV |
1446 | { |
1447 | int status = 0; | |
1448 | struct htc_packet *packet, *tmp_pkt; | |
1449 | struct htc_frame_hdr *htc_hdr; | |
1450 | int i, n_msg; | |
1451 | ||
1452 | spin_lock_bh(&target->rx_lock); | |
1453 | ||
1454 | for (i = 0; i < msg; i++) { | |
1455 | ||
1456 | htc_hdr = (struct htc_frame_hdr *)&lk_ahds[i]; | |
1457 | ||
1458 | if (htc_hdr->eid >= ENDPOINT_MAX) { | |
1459 | ath6kl_err("invalid ep in look-ahead: %d\n", | |
1460 | htc_hdr->eid); | |
1461 | status = -ENOMEM; | |
1462 | break; | |
1463 | } | |
1464 | ||
1465 | if (htc_hdr->eid != endpoint->eid) { | |
1466 | ath6kl_err("invalid ep in look-ahead: %d should be : %d (index:%d)\n", | |
1467 | htc_hdr->eid, endpoint->eid, i); | |
1468 | status = -ENOMEM; | |
1469 | break; | |
1470 | } | |
1471 | ||
1472 | if (le16_to_cpu(htc_hdr->payld_len) > HTC_MAX_PAYLOAD_LENGTH) { | |
1473 | ath6kl_err("payload len %d exceeds max htc : %d !\n", | |
1474 | htc_hdr->payld_len, | |
1475 | (u32) HTC_MAX_PAYLOAD_LENGTH); | |
1476 | status = -ENOMEM; | |
1477 | break; | |
1478 | } | |
1479 | ||
1480 | if (endpoint->svc_id == 0) { | |
1481 | ath6kl_err("ep %d is not connected !\n", htc_hdr->eid); | |
1482 | status = -ENOMEM; | |
1483 | break; | |
1484 | } | |
1485 | ||
1486 | if (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) { | |
1487 | /* | |
1488 | * HTC header indicates that every packet to follow | |
1489 | * has the same padded length so that it can be | |
1490 | * optimally fetched as a full bundle. | |
1491 | */ | |
1492 | n_msg = (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) >> | |
1493 | HTC_FLG_RX_BNDL_CNT_S; | |
1494 | ||
1495 | /* the count doesn't include the starter frame */ | |
1496 | n_msg++; | |
1497 | if (n_msg > target->msg_per_bndl_max) { | |
1498 | status = -ENOMEM; | |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | endpoint->ep_st.rx_bundle_from_hdr += 1; | |
ebf29c95 | 1503 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1504 | "htc rx bundle pkts %d\n", |
bdcd8170 KV |
1505 | n_msg); |
1506 | } else | |
1507 | /* HTC header only indicates 1 message to fetch */ | |
1508 | n_msg = 1; | |
1509 | ||
1510 | /* Setup packet buffers for each message */ | |
689def90 KV |
1511 | status = ath6kl_htc_rx_setup(target, endpoint, &lk_ahds[i], |
1512 | queue, n_msg); | |
bdcd8170 KV |
1513 | |
1514 | /* | |
1515 | * This is due to unavailabilty of buffers to rx entire data. | |
1516 | * Return no error so that free buffers from queue can be used | |
1517 | * to receive partial data. | |
1518 | */ | |
1519 | if (status == -ENOSPC) { | |
1520 | spin_unlock_bh(&target->rx_lock); | |
1521 | return 0; | |
1522 | } | |
1523 | ||
1524 | if (status) | |
1525 | break; | |
1526 | } | |
1527 | ||
1528 | spin_unlock_bh(&target->rx_lock); | |
1529 | ||
1530 | if (status) { | |
1531 | list_for_each_entry_safe(packet, tmp_pkt, queue, list) { | |
1532 | list_del(&packet->list); | |
1533 | htc_reclaim_rxbuf(target, packet, | |
1534 | &target->endpoint[packet->endpoint]); | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | return status; | |
1539 | } | |
1540 | ||
1541 | static void htc_ctrl_rx(struct htc_target *context, struct htc_packet *packets) | |
1542 | { | |
1543 | if (packets->endpoint != ENDPOINT_0) { | |
1544 | WARN_ON(1); | |
1545 | return; | |
1546 | } | |
1547 | ||
1548 | if (packets->status == -ECANCELED) { | |
1549 | reclaim_rx_ctrl_buf(context, packets); | |
1550 | return; | |
1551 | } | |
1552 | ||
1553 | if (packets->act_len > 0) { | |
1554 | ath6kl_err("htc_ctrl_rx, got message with len:%zu\n", | |
96f1fadc | 1555 | packets->act_len + HTC_HDR_LENGTH); |
bdcd8170 | 1556 | |
471e92fd KV |
1557 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, |
1558 | "htc rx unexpected endpoint 0 message", "", | |
ef094103 KV |
1559 | packets->buf - HTC_HDR_LENGTH, |
1560 | packets->act_len + HTC_HDR_LENGTH); | |
bdcd8170 KV |
1561 | } |
1562 | ||
1563 | htc_reclaim_rxbuf(context, packets, &context->endpoint[0]); | |
1564 | } | |
1565 | ||
1566 | static void htc_proc_cred_rpt(struct htc_target *target, | |
1567 | struct htc_credit_report *rpt, | |
1568 | int n_entries, | |
1569 | enum htc_endpoint_id from_ep) | |
1570 | { | |
1571 | struct htc_endpoint *endpoint; | |
1572 | int tot_credits = 0, i; | |
1573 | bool dist = false; | |
1574 | ||
bdcd8170 KV |
1575 | spin_lock_bh(&target->tx_lock); |
1576 | ||
1577 | for (i = 0; i < n_entries; i++, rpt++) { | |
1578 | if (rpt->eid >= ENDPOINT_MAX) { | |
1579 | WARN_ON(1); | |
1580 | spin_unlock_bh(&target->tx_lock); | |
1581 | return; | |
1582 | } | |
1583 | ||
1584 | endpoint = &target->endpoint[rpt->eid]; | |
1585 | ||
02f0d6fc KV |
1586 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
1587 | "credit report ep %d credits %d\n", | |
471e92fd | 1588 | rpt->eid, rpt->credits); |
bdcd8170 KV |
1589 | |
1590 | endpoint->ep_st.tx_cred_rpt += 1; | |
1591 | endpoint->ep_st.cred_retnd += rpt->credits; | |
1592 | ||
1593 | if (from_ep == rpt->eid) { | |
1594 | /* | |
1595 | * This credit report arrived on the same endpoint | |
1596 | * indicating it arrived in an RX packet. | |
1597 | */ | |
1598 | endpoint->ep_st.cred_from_rx += rpt->credits; | |
1599 | endpoint->ep_st.cred_rpt_from_rx += 1; | |
1600 | } else if (from_ep == ENDPOINT_0) { | |
1601 | /* credit arrived on endpoint 0 as a NULL message */ | |
1602 | endpoint->ep_st.cred_from_ep0 += rpt->credits; | |
1603 | endpoint->ep_st.cred_rpt_ep0 += 1; | |
1604 | } else { | |
1605 | endpoint->ep_st.cred_from_other += rpt->credits; | |
1606 | endpoint->ep_st.cred_rpt_from_other += 1; | |
1607 | } | |
1608 | ||
5ba3ee48 | 1609 | if (rpt->eid == ENDPOINT_0) |
bdcd8170 KV |
1610 | /* always give endpoint 0 credits back */ |
1611 | endpoint->cred_dist.credits += rpt->credits; | |
1612 | else { | |
1613 | endpoint->cred_dist.cred_to_dist += rpt->credits; | |
1614 | dist = true; | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Refresh tx depth for distribution function that will | |
1619 | * recover these credits NOTE: this is only valid when | |
1620 | * there are credits to recover! | |
1621 | */ | |
1622 | endpoint->cred_dist.txq_depth = | |
1623 | get_queue_depth(&endpoint->txq); | |
1624 | ||
1625 | tot_credits += rpt->credits; | |
1626 | } | |
1627 | ||
bdcd8170 KV |
1628 | if (dist) { |
1629 | /* | |
1630 | * This was a credit return based on a completed send | |
1631 | * operations note, this is done with the lock held | |
1632 | */ | |
3c370398 | 1633 | ath6kl_credit_distribute(target->credit_info, |
fa99e963 KV |
1634 | &target->cred_dist_list, |
1635 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
bdcd8170 KV |
1636 | } |
1637 | ||
1638 | spin_unlock_bh(&target->tx_lock); | |
1639 | ||
1640 | if (tot_credits) | |
1641 | htc_chk_ep_txq(target); | |
1642 | } | |
1643 | ||
1644 | static int htc_parse_trailer(struct htc_target *target, | |
1645 | struct htc_record_hdr *record, | |
1646 | u8 *record_buf, u32 *next_lk_ahds, | |
1647 | enum htc_endpoint_id endpoint, | |
1648 | int *n_lk_ahds) | |
1649 | { | |
1650 | struct htc_bundle_lkahd_rpt *bundle_lkahd_rpt; | |
1651 | struct htc_lookahead_report *lk_ahd; | |
1652 | int len; | |
1653 | ||
1654 | switch (record->rec_id) { | |
1655 | case HTC_RECORD_CREDITS: | |
1656 | len = record->len / sizeof(struct htc_credit_report); | |
1657 | if (!len) { | |
1658 | WARN_ON(1); | |
1659 | return -EINVAL; | |
1660 | } | |
1661 | ||
1662 | htc_proc_cred_rpt(target, | |
1663 | (struct htc_credit_report *) record_buf, | |
1664 | len, endpoint); | |
1665 | break; | |
1666 | case HTC_RECORD_LOOKAHEAD: | |
1667 | len = record->len / sizeof(*lk_ahd); | |
1668 | if (!len) { | |
1669 | WARN_ON(1); | |
1670 | return -EINVAL; | |
1671 | } | |
1672 | ||
1673 | lk_ahd = (struct htc_lookahead_report *) record_buf; | |
ddc3d77c KV |
1674 | if ((lk_ahd->pre_valid == ((~lk_ahd->post_valid) & 0xFF)) && |
1675 | next_lk_ahds) { | |
bdcd8170 | 1676 | |
ebf29c95 | 1677 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1678 | "htc rx lk_ahd found pre_valid 0x%x post_valid 0x%x\n", |
bdcd8170 KV |
1679 | lk_ahd->pre_valid, lk_ahd->post_valid); |
1680 | ||
1681 | /* look ahead bytes are valid, copy them over */ | |
1682 | memcpy((u8 *)&next_lk_ahds[0], lk_ahd->lk_ahd, 4); | |
1683 | ||
471e92fd KV |
1684 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, |
1685 | "htc rx next look ahead", | |
ef094103 | 1686 | "", next_lk_ahds, 4); |
bdcd8170 KV |
1687 | |
1688 | *n_lk_ahds = 1; | |
1689 | } | |
1690 | break; | |
1691 | case HTC_RECORD_LOOKAHEAD_BUNDLE: | |
1692 | len = record->len / sizeof(*bundle_lkahd_rpt); | |
1693 | if (!len || (len > HTC_HOST_MAX_MSG_PER_BUNDLE)) { | |
1694 | WARN_ON(1); | |
1695 | return -EINVAL; | |
1696 | } | |
1697 | ||
1698 | if (next_lk_ahds) { | |
1699 | int i; | |
1700 | ||
1701 | bundle_lkahd_rpt = | |
1702 | (struct htc_bundle_lkahd_rpt *) record_buf; | |
1703 | ||
471e92fd | 1704 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bundle lk_ahd", |
ef094103 | 1705 | "", record_buf, record->len); |
bdcd8170 KV |
1706 | |
1707 | for (i = 0; i < len; i++) { | |
1708 | memcpy((u8 *)&next_lk_ahds[i], | |
1709 | bundle_lkahd_rpt->lk_ahd, 4); | |
1710 | bundle_lkahd_rpt++; | |
1711 | } | |
1712 | ||
1713 | *n_lk_ahds = i; | |
1714 | } | |
1715 | break; | |
1716 | default: | |
1717 | ath6kl_err("unhandled record: id:%d len:%d\n", | |
1718 | record->rec_id, record->len); | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | return 0; | |
1723 | ||
1724 | } | |
1725 | ||
1726 | static int htc_proc_trailer(struct htc_target *target, | |
1727 | u8 *buf, int len, u32 *next_lk_ahds, | |
1728 | int *n_lk_ahds, enum htc_endpoint_id endpoint) | |
1729 | { | |
1730 | struct htc_record_hdr *record; | |
1731 | int orig_len; | |
1732 | int status; | |
1733 | u8 *record_buf; | |
1734 | u8 *orig_buf; | |
1735 | ||
471e92fd KV |
1736 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc rx trailer len %d\n", len); |
1737 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, NULL, "", buf, len); | |
bdcd8170 KV |
1738 | |
1739 | orig_buf = buf; | |
1740 | orig_len = len; | |
1741 | status = 0; | |
1742 | ||
1743 | while (len > 0) { | |
1744 | ||
1745 | if (len < sizeof(struct htc_record_hdr)) { | |
1746 | status = -ENOMEM; | |
1747 | break; | |
1748 | } | |
1749 | /* these are byte aligned structs */ | |
1750 | record = (struct htc_record_hdr *) buf; | |
1751 | len -= sizeof(struct htc_record_hdr); | |
1752 | buf += sizeof(struct htc_record_hdr); | |
1753 | ||
1754 | if (record->len > len) { | |
1755 | ath6kl_err("invalid record len: %d (id:%d) buf has: %d bytes left\n", | |
1756 | record->len, record->rec_id, len); | |
1757 | status = -ENOMEM; | |
1758 | break; | |
1759 | } | |
1760 | record_buf = buf; | |
1761 | ||
1762 | status = htc_parse_trailer(target, record, record_buf, | |
1763 | next_lk_ahds, endpoint, n_lk_ahds); | |
1764 | ||
1765 | if (status) | |
1766 | break; | |
1767 | ||
1768 | /* advance buffer past this record for next time around */ | |
1769 | buf += record->len; | |
1770 | len -= record->len; | |
1771 | } | |
1772 | ||
2588f554 | 1773 | if (status) |
471e92fd | 1774 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad trailer", |
ef094103 | 1775 | "", orig_buf, orig_len); |
bdcd8170 KV |
1776 | |
1777 | return status; | |
1778 | } | |
1779 | ||
689def90 KV |
1780 | static int ath6kl_htc_rx_process_hdr(struct htc_target *target, |
1781 | struct htc_packet *packet, | |
1782 | u32 *next_lkahds, int *n_lkahds) | |
bdcd8170 KV |
1783 | { |
1784 | int status = 0; | |
1785 | u16 payload_len; | |
1786 | u32 lk_ahd; | |
1787 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)packet->buf; | |
1788 | ||
1789 | if (n_lkahds != NULL) | |
1790 | *n_lkahds = 0; | |
1791 | ||
bdcd8170 KV |
1792 | /* |
1793 | * NOTE: we cannot assume the alignment of buf, so we use the safe | |
1794 | * macros to retrieve 16 bit fields. | |
1795 | */ | |
1796 | payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len)); | |
1797 | ||
1798 | memcpy((u8 *)&lk_ahd, packet->buf, sizeof(lk_ahd)); | |
1799 | ||
1800 | if (packet->info.rx.rx_flags & HTC_RX_PKT_REFRESH_HDR) { | |
1801 | /* | |
1802 | * Refresh the expected header and the actual length as it | |
1803 | * was unknown when this packet was grabbed as part of the | |
1804 | * bundle. | |
1805 | */ | |
1806 | packet->info.rx.exp_hdr = lk_ahd; | |
1807 | packet->act_len = payload_len + HTC_HDR_LENGTH; | |
1808 | ||
1809 | /* validate the actual header that was refreshed */ | |
1810 | if (packet->act_len > packet->buf_len) { | |
1811 | ath6kl_err("refreshed hdr payload len (%d) in bundled recv is invalid (hdr: 0x%X)\n", | |
1812 | payload_len, lk_ahd); | |
1813 | /* | |
1814 | * Limit this to max buffer just to print out some | |
1815 | * of the buffer. | |
1816 | */ | |
1817 | packet->act_len = min(packet->act_len, packet->buf_len); | |
1818 | status = -ENOMEM; | |
1819 | goto fail_rx; | |
1820 | } | |
1821 | ||
1822 | if (packet->endpoint != htc_hdr->eid) { | |
1823 | ath6kl_err("refreshed hdr ep (%d) does not match expected ep (%d)\n", | |
1824 | htc_hdr->eid, packet->endpoint); | |
1825 | status = -ENOMEM; | |
1826 | goto fail_rx; | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | if (lk_ahd != packet->info.rx.exp_hdr) { | |
689def90 KV |
1831 | ath6kl_err("%s(): lk_ahd mismatch! (pPkt:0x%p flags:0x%X)\n", |
1832 | __func__, packet, packet->info.rx.rx_flags); | |
471e92fd | 1833 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx expected lk_ahd", |
ef094103 | 1834 | "", &packet->info.rx.exp_hdr, 4); |
471e92fd | 1835 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx current header", |
ef094103 | 1836 | "", (u8 *)&lk_ahd, sizeof(lk_ahd)); |
bdcd8170 KV |
1837 | status = -ENOMEM; |
1838 | goto fail_rx; | |
1839 | } | |
1840 | ||
1841 | if (htc_hdr->flags & HTC_FLG_RX_TRAILER) { | |
1842 | if (htc_hdr->ctrl[0] < sizeof(struct htc_record_hdr) || | |
1843 | htc_hdr->ctrl[0] > payload_len) { | |
689def90 KV |
1844 | ath6kl_err("%s(): invalid hdr (payload len should be :%d, CB[0] is:%d)\n", |
1845 | __func__, payload_len, htc_hdr->ctrl[0]); | |
bdcd8170 KV |
1846 | status = -ENOMEM; |
1847 | goto fail_rx; | |
1848 | } | |
1849 | ||
1850 | if (packet->info.rx.rx_flags & HTC_RX_PKT_IGNORE_LOOKAHEAD) { | |
1851 | next_lkahds = NULL; | |
1852 | n_lkahds = NULL; | |
1853 | } | |
1854 | ||
1855 | status = htc_proc_trailer(target, packet->buf + HTC_HDR_LENGTH | |
1856 | + payload_len - htc_hdr->ctrl[0], | |
1857 | htc_hdr->ctrl[0], next_lkahds, | |
1858 | n_lkahds, packet->endpoint); | |
1859 | ||
1860 | if (status) | |
1861 | goto fail_rx; | |
1862 | ||
1863 | packet->act_len -= htc_hdr->ctrl[0]; | |
1864 | } | |
1865 | ||
1866 | packet->buf += HTC_HDR_LENGTH; | |
1867 | packet->act_len -= HTC_HDR_LENGTH; | |
1868 | ||
1869 | fail_rx: | |
1870 | if (status) | |
471e92fd KV |
1871 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad packet", |
1872 | "", packet->buf, packet->act_len); | |
bdcd8170 KV |
1873 | |
1874 | return status; | |
1875 | } | |
1876 | ||
689def90 KV |
1877 | static void ath6kl_htc_rx_complete(struct htc_endpoint *endpoint, |
1878 | struct htc_packet *packet) | |
bdcd8170 | 1879 | { |
ebf29c95 | 1880 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1881 | "htc rx complete ep %d packet 0x%p\n", |
bdcd8170 KV |
1882 | endpoint->eid, packet); |
1883 | endpoint->ep_cb.rx(endpoint->target, packet); | |
1884 | } | |
1885 | ||
689def90 KV |
1886 | static int ath6kl_htc_rx_bundle(struct htc_target *target, |
1887 | struct list_head *rxq, | |
1888 | struct list_head *sync_compq, | |
1889 | int *n_pkt_fetched, bool part_bundle) | |
bdcd8170 KV |
1890 | { |
1891 | struct hif_scatter_req *scat_req; | |
1892 | struct htc_packet *packet; | |
3b2f5e51 | 1893 | int rem_space = target->max_rx_bndl_sz; |
bdcd8170 KV |
1894 | int n_scat_pkt, status = 0, i, len; |
1895 | ||
1896 | n_scat_pkt = get_queue_depth(rxq); | |
1897 | n_scat_pkt = min(n_scat_pkt, target->msg_per_bndl_max); | |
1898 | ||
1899 | if ((get_queue_depth(rxq) - n_scat_pkt) > 0) { | |
1900 | /* | |
1901 | * We were forced to split this bundle receive operation | |
1902 | * all packets in this partial bundle must have their | |
1903 | * lookaheads ignored. | |
1904 | */ | |
1905 | part_bundle = true; | |
1906 | ||
1907 | /* | |
1908 | * This would only happen if the target ignored our max | |
1909 | * bundle limit. | |
1910 | */ | |
689def90 KV |
1911 | ath6kl_warn("%s(): partial bundle detected num:%d , %d\n", |
1912 | __func__, get_queue_depth(rxq), n_scat_pkt); | |
bdcd8170 KV |
1913 | } |
1914 | ||
1915 | len = 0; | |
1916 | ||
ebf29c95 | 1917 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd KV |
1918 | "htc rx bundle depth %d pkts %d\n", |
1919 | get_queue_depth(rxq), n_scat_pkt); | |
bdcd8170 KV |
1920 | |
1921 | scat_req = hif_scatter_req_get(target->dev->ar); | |
1922 | ||
1923 | if (scat_req == NULL) | |
1924 | goto fail_rx_pkt; | |
1925 | ||
bdcd8170 KV |
1926 | for (i = 0; i < n_scat_pkt; i++) { |
1927 | int pad_len; | |
1928 | ||
1929 | packet = list_first_entry(rxq, struct htc_packet, list); | |
1930 | list_del(&packet->list); | |
1931 | ||
5be8824f | 1932 | pad_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
1933 | packet->act_len); |
1934 | ||
1935 | if ((rem_space - pad_len) < 0) { | |
1936 | list_add(&packet->list, rxq); | |
1937 | break; | |
1938 | } | |
1939 | ||
1940 | rem_space -= pad_len; | |
1941 | ||
1942 | if (part_bundle || (i < (n_scat_pkt - 1))) | |
1943 | /* | |
1944 | * Packet 0..n-1 cannot be checked for look-aheads | |
1945 | * since we are fetching a bundle the last packet | |
1946 | * however can have it's lookahead used | |
1947 | */ | |
1948 | packet->info.rx.rx_flags |= | |
1949 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
1950 | ||
1951 | /* NOTE: 1 HTC packet per scatter entry */ | |
1952 | scat_req->scat_list[i].buf = packet->buf; | |
1953 | scat_req->scat_list[i].len = pad_len; | |
1954 | ||
1955 | packet->info.rx.rx_flags |= HTC_RX_PKT_PART_OF_BUNDLE; | |
1956 | ||
1957 | list_add_tail(&packet->list, sync_compq); | |
1958 | ||
1959 | WARN_ON(!scat_req->scat_list[i].len); | |
1960 | len += scat_req->scat_list[i].len; | |
1961 | } | |
1962 | ||
1963 | scat_req->len = len; | |
1964 | scat_req->scat_entries = i; | |
1965 | ||
8e8ddb2b | 1966 | status = ath6kl_hif_submit_scat_req(target->dev, scat_req, true); |
bdcd8170 KV |
1967 | |
1968 | if (!status) | |
1969 | *n_pkt_fetched = i; | |
1970 | ||
1971 | /* free scatter request */ | |
1972 | hif_scatter_req_add(target->dev->ar, scat_req); | |
1973 | ||
1974 | fail_rx_pkt: | |
1975 | ||
1976 | return status; | |
1977 | } | |
1978 | ||
689def90 KV |
1979 | static int ath6kl_htc_rx_process_packets(struct htc_target *target, |
1980 | struct list_head *comp_pktq, | |
1981 | u32 lk_ahds[], | |
1982 | int *n_lk_ahd) | |
bdcd8170 KV |
1983 | { |
1984 | struct htc_packet *packet, *tmp_pkt; | |
1985 | struct htc_endpoint *ep; | |
1986 | int status = 0; | |
1987 | ||
1988 | list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) { | |
bdcd8170 KV |
1989 | ep = &target->endpoint[packet->endpoint]; |
1990 | ||
1991 | /* process header for each of the recv packet */ | |
689def90 KV |
1992 | status = ath6kl_htc_rx_process_hdr(target, packet, lk_ahds, |
1993 | n_lk_ahd); | |
bdcd8170 KV |
1994 | if (status) |
1995 | return status; | |
1996 | ||
4159cc93 VT |
1997 | list_del(&packet->list); |
1998 | ||
bdcd8170 KV |
1999 | if (list_empty(comp_pktq)) { |
2000 | /* | |
2001 | * Last packet's more packet flag is set | |
2002 | * based on the lookahead. | |
2003 | */ | |
2004 | if (*n_lk_ahd > 0) | |
689def90 KV |
2005 | ath6kl_htc_rx_set_indicate(lk_ahds[0], |
2006 | ep, packet); | |
bdcd8170 KV |
2007 | } else |
2008 | /* | |
2009 | * Packets in a bundle automatically have | |
2010 | * this flag set. | |
2011 | */ | |
2012 | packet->info.rx.indicat_flags |= | |
2013 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
2014 | ||
689def90 | 2015 | ath6kl_htc_rx_update_stats(ep, *n_lk_ahd); |
bdcd8170 KV |
2016 | |
2017 | if (packet->info.rx.rx_flags & HTC_RX_PKT_PART_OF_BUNDLE) | |
2018 | ep->ep_st.rx_bundl += 1; | |
2019 | ||
689def90 | 2020 | ath6kl_htc_rx_complete(ep, packet); |
bdcd8170 KV |
2021 | } |
2022 | ||
2023 | return status; | |
2024 | } | |
2025 | ||
689def90 KV |
2026 | static int ath6kl_htc_rx_fetch(struct htc_target *target, |
2027 | struct list_head *rx_pktq, | |
2028 | struct list_head *comp_pktq) | |
bdcd8170 KV |
2029 | { |
2030 | int fetched_pkts; | |
2031 | bool part_bundle = false; | |
2032 | int status = 0; | |
99f54299 VT |
2033 | struct list_head tmp_rxq; |
2034 | struct htc_packet *packet, *tmp_pkt; | |
bdcd8170 KV |
2035 | |
2036 | /* now go fetch the list of HTC packets */ | |
2037 | while (!list_empty(rx_pktq)) { | |
2038 | fetched_pkts = 0; | |
2039 | ||
99f54299 VT |
2040 | INIT_LIST_HEAD(&tmp_rxq); |
2041 | ||
bdcd8170 KV |
2042 | if (target->rx_bndl_enable && (get_queue_depth(rx_pktq) > 1)) { |
2043 | /* | |
2044 | * There are enough packets to attempt a | |
2045 | * bundle transfer and recv bundling is | |
2046 | * allowed. | |
2047 | */ | |
689def90 | 2048 | status = ath6kl_htc_rx_bundle(target, rx_pktq, |
99f54299 | 2049 | &tmp_rxq, |
689def90 KV |
2050 | &fetched_pkts, |
2051 | part_bundle); | |
bdcd8170 | 2052 | if (status) |
99f54299 | 2053 | goto fail_rx; |
bdcd8170 KV |
2054 | |
2055 | if (!list_empty(rx_pktq)) | |
2056 | part_bundle = true; | |
99f54299 VT |
2057 | |
2058 | list_splice_tail_init(&tmp_rxq, comp_pktq); | |
bdcd8170 KV |
2059 | } |
2060 | ||
2061 | if (!fetched_pkts) { | |
bdcd8170 KV |
2062 | |
2063 | packet = list_first_entry(rx_pktq, struct htc_packet, | |
2064 | list); | |
2065 | ||
bdcd8170 KV |
2066 | /* fully synchronous */ |
2067 | packet->completion = NULL; | |
2068 | ||
b8d5d5ff | 2069 | if (!list_is_singular(rx_pktq)) |
bdcd8170 KV |
2070 | /* |
2071 | * look_aheads in all packet | |
2072 | * except the last one in the | |
2073 | * bundle must be ignored | |
2074 | */ | |
2075 | packet->info.rx.rx_flags |= | |
2076 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
2077 | ||
2078 | /* go fetch the packet */ | |
689def90 KV |
2079 | status = ath6kl_htc_rx_packet(target, packet, |
2080 | packet->act_len); | |
99f54299 VT |
2081 | |
2082 | list_move_tail(&packet->list, &tmp_rxq); | |
2083 | ||
bdcd8170 | 2084 | if (status) |
99f54299 | 2085 | goto fail_rx; |
bdcd8170 | 2086 | |
99f54299 | 2087 | list_splice_tail_init(&tmp_rxq, comp_pktq); |
bdcd8170 KV |
2088 | } |
2089 | } | |
2090 | ||
99f54299 VT |
2091 | return 0; |
2092 | ||
2093 | fail_rx: | |
2094 | ||
2095 | /* | |
2096 | * Cleanup any packets we allocated but didn't use to | |
2097 | * actually fetch any packets. | |
2098 | */ | |
2099 | ||
2100 | list_for_each_entry_safe(packet, tmp_pkt, rx_pktq, list) { | |
2101 | list_del(&packet->list); | |
2102 | htc_reclaim_rxbuf(target, packet, | |
96f1fadc | 2103 | &target->endpoint[packet->endpoint]); |
99f54299 VT |
2104 | } |
2105 | ||
2106 | list_for_each_entry_safe(packet, tmp_pkt, &tmp_rxq, list) { | |
2107 | list_del(&packet->list); | |
2108 | htc_reclaim_rxbuf(target, packet, | |
96f1fadc | 2109 | &target->endpoint[packet->endpoint]); |
99f54299 VT |
2110 | } |
2111 | ||
bdcd8170 KV |
2112 | return status; |
2113 | } | |
2114 | ||
ad226ec2 | 2115 | int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target, |
4533d901 | 2116 | u32 msg_look_ahead, int *num_pkts) |
bdcd8170 KV |
2117 | { |
2118 | struct htc_packet *packets, *tmp_pkt; | |
2119 | struct htc_endpoint *endpoint; | |
2120 | struct list_head rx_pktq, comp_pktq; | |
2121 | int status = 0; | |
2122 | u32 look_aheads[HTC_HOST_MAX_MSG_PER_BUNDLE]; | |
2123 | int num_look_ahead = 1; | |
2124 | enum htc_endpoint_id id; | |
2125 | int n_fetched = 0; | |
2126 | ||
cbec267a | 2127 | INIT_LIST_HEAD(&comp_pktq); |
bdcd8170 KV |
2128 | *num_pkts = 0; |
2129 | ||
2130 | /* | |
2131 | * On first entry copy the look_aheads into our temp array for | |
2132 | * processing | |
2133 | */ | |
4533d901 | 2134 | look_aheads[0] = msg_look_ahead; |
bdcd8170 KV |
2135 | |
2136 | while (true) { | |
2137 | ||
2138 | /* | |
2139 | * First lookahead sets the expected endpoint IDs for all | |
2140 | * packets in a bundle. | |
2141 | */ | |
2142 | id = ((struct htc_frame_hdr *)&look_aheads[0])->eid; | |
2143 | endpoint = &target->endpoint[id]; | |
2144 | ||
2145 | if (id >= ENDPOINT_MAX) { | |
2146 | ath6kl_err("MsgPend, invalid endpoint in look-ahead: %d\n", | |
2147 | id); | |
2148 | status = -ENOMEM; | |
2149 | break; | |
2150 | } | |
2151 | ||
2152 | INIT_LIST_HEAD(&rx_pktq); | |
2153 | INIT_LIST_HEAD(&comp_pktq); | |
2154 | ||
2155 | /* | |
2156 | * Try to allocate as many HTC RX packets indicated by the | |
2157 | * look_aheads. | |
2158 | */ | |
689def90 KV |
2159 | status = ath6kl_htc_rx_alloc(target, look_aheads, |
2160 | num_look_ahead, endpoint, | |
2161 | &rx_pktq); | |
bdcd8170 KV |
2162 | if (status) |
2163 | break; | |
2164 | ||
2165 | if (get_queue_depth(&rx_pktq) >= 2) | |
2166 | /* | |
2167 | * A recv bundle was detected, force IRQ status | |
2168 | * re-check again | |
2169 | */ | |
fcb82058 | 2170 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
2171 | |
2172 | n_fetched += get_queue_depth(&rx_pktq); | |
2173 | ||
2174 | num_look_ahead = 0; | |
2175 | ||
689def90 | 2176 | status = ath6kl_htc_rx_fetch(target, &rx_pktq, &comp_pktq); |
bdcd8170 KV |
2177 | |
2178 | if (!status) | |
689def90 | 2179 | ath6kl_htc_rx_chk_water_mark(endpoint); |
bdcd8170 KV |
2180 | |
2181 | /* Process fetched packets */ | |
689def90 KV |
2182 | status = ath6kl_htc_rx_process_packets(target, &comp_pktq, |
2183 | look_aheads, | |
2184 | &num_look_ahead); | |
bdcd8170 KV |
2185 | |
2186 | if (!num_look_ahead || status) | |
2187 | break; | |
2188 | ||
2189 | /* | |
2190 | * For SYNCH processing, if we get here, we are running | |
2191 | * through the loop again due to a detected lookahead. Set | |
2192 | * flag that we should re-check IRQ status registers again | |
2193 | * before leaving IRQ processing, this can net better | |
2194 | * performance in high throughput situations. | |
2195 | */ | |
fcb82058 | 2196 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
2197 | } |
2198 | ||
2199 | if (status) { | |
2200 | ath6kl_err("failed to get pending recv messages: %d\n", | |
2201 | status); | |
bdcd8170 KV |
2202 | |
2203 | /* cleanup any packets in sync completion queue */ | |
2204 | list_for_each_entry_safe(packets, tmp_pkt, &comp_pktq, list) { | |
2205 | list_del(&packets->list); | |
2206 | htc_reclaim_rxbuf(target, packets, | |
2207 | &target->endpoint[packets->endpoint]); | |
2208 | } | |
2209 | ||
2210 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
2211 | ath6kl_warn("host is going to stop blocking receiver for htc_stop\n"); | |
8e8ddb2b | 2212 | ath6kl_hif_rx_control(target->dev, false); |
bdcd8170 KV |
2213 | } |
2214 | } | |
2215 | ||
2216 | /* | |
2217 | * Before leaving, check to see if host ran out of buffers and | |
2218 | * needs to stop the receiver. | |
2219 | */ | |
2220 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
2221 | ath6kl_warn("host has no rx buffers blocking receiver to prevent overrun\n"); | |
8e8ddb2b | 2222 | ath6kl_hif_rx_control(target->dev, false); |
bdcd8170 KV |
2223 | } |
2224 | *num_pkts = n_fetched; | |
2225 | ||
2226 | return status; | |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * Synchronously wait for a control message from the target, | |
2231 | * This function is used at initialization time ONLY. At init messages | |
2232 | * on ENDPOINT 0 are expected. | |
2233 | */ | |
2234 | static struct htc_packet *htc_wait_for_ctrl_msg(struct htc_target *target) | |
2235 | { | |
2236 | struct htc_packet *packet = NULL; | |
2237 | struct htc_frame_hdr *htc_hdr; | |
2238 | u32 look_ahead; | |
2239 | ||
8e8ddb2b | 2240 | if (ath6kl_hif_poll_mboxmsg_rx(target->dev, &look_ahead, |
96f1fadc | 2241 | HTC_TARGET_RESPONSE_TIMEOUT)) |
bdcd8170 KV |
2242 | return NULL; |
2243 | ||
ebf29c95 | 2244 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 2245 | "htc rx wait ctrl look_ahead 0x%X\n", look_ahead); |
bdcd8170 KV |
2246 | |
2247 | htc_hdr = (struct htc_frame_hdr *)&look_ahead; | |
2248 | ||
2249 | if (htc_hdr->eid != ENDPOINT_0) | |
2250 | return NULL; | |
2251 | ||
2252 | packet = htc_get_control_buf(target, false); | |
2253 | ||
2254 | if (!packet) | |
2255 | return NULL; | |
2256 | ||
2257 | packet->info.rx.rx_flags = 0; | |
2258 | packet->info.rx.exp_hdr = look_ahead; | |
2259 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + HTC_HDR_LENGTH; | |
2260 | ||
2261 | if (packet->act_len > packet->buf_len) | |
2262 | goto fail_ctrl_rx; | |
2263 | ||
2264 | /* we want synchronous operation */ | |
2265 | packet->completion = NULL; | |
2266 | ||
2267 | /* get the message from the device, this will block */ | |
689def90 | 2268 | if (ath6kl_htc_rx_packet(target, packet, packet->act_len)) |
bdcd8170 KV |
2269 | goto fail_ctrl_rx; |
2270 | ||
2271 | /* process receive header */ | |
689def90 | 2272 | packet->status = ath6kl_htc_rx_process_hdr(target, packet, NULL, NULL); |
bdcd8170 KV |
2273 | |
2274 | if (packet->status) { | |
689def90 | 2275 | ath6kl_err("htc_wait_for_ctrl_msg, ath6kl_htc_rx_process_hdr failed (status = %d)\n", |
bdcd8170 KV |
2276 | packet->status); |
2277 | goto fail_ctrl_rx; | |
2278 | } | |
2279 | ||
2280 | return packet; | |
2281 | ||
2282 | fail_ctrl_rx: | |
2283 | if (packet != NULL) { | |
2284 | htc_rxpkt_reset(packet); | |
2285 | reclaim_rx_ctrl_buf(target, packet); | |
2286 | } | |
2287 | ||
2288 | return NULL; | |
2289 | } | |
2290 | ||
ad226ec2 KV |
2291 | int ath6kl_htc_add_rxbuf_multiple(struct htc_target *target, |
2292 | struct list_head *pkt_queue) | |
bdcd8170 KV |
2293 | { |
2294 | struct htc_endpoint *endpoint; | |
2295 | struct htc_packet *first_pkt; | |
2296 | bool rx_unblock = false; | |
2297 | int status = 0, depth; | |
2298 | ||
2299 | if (list_empty(pkt_queue)) | |
2300 | return -ENOMEM; | |
2301 | ||
2302 | first_pkt = list_first_entry(pkt_queue, struct htc_packet, list); | |
2303 | ||
2304 | if (first_pkt->endpoint >= ENDPOINT_MAX) | |
2305 | return status; | |
2306 | ||
2307 | depth = get_queue_depth(pkt_queue); | |
2308 | ||
ebf29c95 | 2309 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 2310 | "htc rx add multiple ep id %d cnt %d len %d\n", |
bdcd8170 KV |
2311 | first_pkt->endpoint, depth, first_pkt->buf_len); |
2312 | ||
2313 | endpoint = &target->endpoint[first_pkt->endpoint]; | |
2314 | ||
2315 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
2316 | struct htc_packet *packet, *tmp_pkt; | |
2317 | ||
2318 | /* walk through queue and mark each one canceled */ | |
2319 | list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { | |
2320 | packet->status = -ECANCELED; | |
2321 | list_del(&packet->list); | |
689def90 | 2322 | ath6kl_htc_rx_complete(endpoint, packet); |
bdcd8170 KV |
2323 | } |
2324 | ||
2325 | return status; | |
2326 | } | |
2327 | ||
2328 | spin_lock_bh(&target->rx_lock); | |
2329 | ||
2330 | list_splice_tail_init(pkt_queue, &endpoint->rx_bufq); | |
2331 | ||
2332 | /* check if we are blocked waiting for a new buffer */ | |
2333 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
2334 | if (target->ep_waiting == first_pkt->endpoint) { | |
ebf29c95 | 2335 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
2336 | "htc rx blocked on ep %d, unblocking\n", |
2337 | target->ep_waiting); | |
bdcd8170 KV |
2338 | target->rx_st_flags &= ~HTC_RECV_WAIT_BUFFERS; |
2339 | target->ep_waiting = ENDPOINT_MAX; | |
2340 | rx_unblock = true; | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | spin_unlock_bh(&target->rx_lock); | |
2345 | ||
2346 | if (rx_unblock && !(target->htc_flags & HTC_OP_STATE_STOPPING)) | |
2347 | /* TODO : implement a buffer threshold count? */ | |
8e8ddb2b | 2348 | ath6kl_hif_rx_control(target->dev, true); |
bdcd8170 KV |
2349 | |
2350 | return status; | |
2351 | } | |
2352 | ||
ad226ec2 | 2353 | void ath6kl_htc_flush_rx_buf(struct htc_target *target) |
bdcd8170 KV |
2354 | { |
2355 | struct htc_endpoint *endpoint; | |
2356 | struct htc_packet *packet, *tmp_pkt; | |
2357 | int i; | |
2358 | ||
2359 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
2360 | endpoint = &target->endpoint[i]; | |
2361 | if (!endpoint->svc_id) | |
2362 | /* not in use.. */ | |
2363 | continue; | |
2364 | ||
2365 | spin_lock_bh(&target->rx_lock); | |
2366 | list_for_each_entry_safe(packet, tmp_pkt, | |
2367 | &endpoint->rx_bufq, list) { | |
2368 | list_del(&packet->list); | |
2369 | spin_unlock_bh(&target->rx_lock); | |
ebf29c95 | 2370 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 2371 | "htc rx flush pkt 0x%p len %d ep %d\n", |
bdcd8170 KV |
2372 | packet, packet->buf_len, |
2373 | packet->endpoint); | |
5378f244 VT |
2374 | /* |
2375 | * packets in rx_bufq of endpoint 0 have originally | |
2376 | * been queued from target->free_ctrl_rxbuf where | |
2377 | * packet and packet->buf_start are allocated | |
2378 | * separately using kmalloc(). For other endpoint | |
2379 | * rx_bufq, it is allocated as skb where packet is | |
2380 | * skb->head. Take care of this difference while freeing | |
2381 | * the memory. | |
2382 | */ | |
2383 | if (packet->endpoint == ENDPOINT_0) { | |
2384 | kfree(packet->buf_start); | |
2385 | kfree(packet); | |
2386 | } else { | |
2387 | dev_kfree_skb(packet->pkt_cntxt); | |
2388 | } | |
bdcd8170 KV |
2389 | spin_lock_bh(&target->rx_lock); |
2390 | } | |
2391 | spin_unlock_bh(&target->rx_lock); | |
2392 | } | |
2393 | } | |
2394 | ||
ad226ec2 KV |
2395 | int ath6kl_htc_conn_service(struct htc_target *target, |
2396 | struct htc_service_connect_req *conn_req, | |
2397 | struct htc_service_connect_resp *conn_resp) | |
bdcd8170 KV |
2398 | { |
2399 | struct htc_packet *rx_pkt = NULL; | |
2400 | struct htc_packet *tx_pkt = NULL; | |
2401 | struct htc_conn_service_resp *resp_msg; | |
2402 | struct htc_conn_service_msg *conn_msg; | |
2403 | struct htc_endpoint *endpoint; | |
2404 | enum htc_endpoint_id assigned_ep = ENDPOINT_MAX; | |
2405 | unsigned int max_msg_sz = 0; | |
2406 | int status = 0; | |
05aab177 | 2407 | u16 msg_id; |
bdcd8170 | 2408 | |
ebf29c95 | 2409 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 2410 | "htc connect service target 0x%p service id 0x%x\n", |
bdcd8170 KV |
2411 | target, conn_req->svc_id); |
2412 | ||
2413 | if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) { | |
2414 | /* special case for pseudo control service */ | |
2415 | assigned_ep = ENDPOINT_0; | |
2416 | max_msg_sz = HTC_MAX_CTRL_MSG_LEN; | |
2417 | } else { | |
2418 | /* allocate a packet to send to the target */ | |
2419 | tx_pkt = htc_get_control_buf(target, true); | |
2420 | ||
2421 | if (!tx_pkt) | |
2422 | return -ENOMEM; | |
2423 | ||
2424 | conn_msg = (struct htc_conn_service_msg *)tx_pkt->buf; | |
2425 | memset(conn_msg, 0, sizeof(*conn_msg)); | |
2426 | conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID); | |
2427 | conn_msg->svc_id = cpu_to_le16(conn_req->svc_id); | |
2428 | conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags); | |
2429 | ||
2430 | set_htc_pkt_info(tx_pkt, NULL, (u8 *) conn_msg, | |
2431 | sizeof(*conn_msg) + conn_msg->svc_meta_len, | |
2432 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
2433 | ||
2434 | /* we want synchronous operation */ | |
2435 | tx_pkt->completion = NULL; | |
dfa0104c KV |
2436 | ath6kl_htc_tx_prep_pkt(tx_pkt, 0, 0, 0); |
2437 | status = ath6kl_htc_tx_issue(target, tx_pkt); | |
bdcd8170 KV |
2438 | |
2439 | if (status) | |
2440 | goto fail_tx; | |
2441 | ||
2442 | /* wait for response */ | |
2443 | rx_pkt = htc_wait_for_ctrl_msg(target); | |
2444 | ||
2445 | if (!rx_pkt) { | |
2446 | status = -ENOMEM; | |
2447 | goto fail_tx; | |
2448 | } | |
2449 | ||
2450 | resp_msg = (struct htc_conn_service_resp *)rx_pkt->buf; | |
05aab177 | 2451 | msg_id = le16_to_cpu(resp_msg->msg_id); |
bdcd8170 | 2452 | |
05aab177 | 2453 | if ((msg_id != HTC_MSG_CONN_SVC_RESP_ID) || |
ddc3d77c | 2454 | (rx_pkt->act_len < sizeof(*resp_msg))) { |
bdcd8170 KV |
2455 | status = -ENOMEM; |
2456 | goto fail_tx; | |
2457 | } | |
2458 | ||
2459 | conn_resp->resp_code = resp_msg->status; | |
2460 | /* check response status */ | |
2461 | if (resp_msg->status != HTC_SERVICE_SUCCESS) { | |
2462 | ath6kl_err("target failed service 0x%X connect request (status:%d)\n", | |
2463 | resp_msg->svc_id, resp_msg->status); | |
2464 | status = -ENOMEM; | |
2465 | goto fail_tx; | |
2466 | } | |
2467 | ||
2468 | assigned_ep = (enum htc_endpoint_id)resp_msg->eid; | |
2469 | max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz); | |
2470 | } | |
2471 | ||
2472 | if (assigned_ep >= ENDPOINT_MAX || !max_msg_sz) { | |
2473 | status = -ENOMEM; | |
2474 | goto fail_tx; | |
2475 | } | |
2476 | ||
2477 | endpoint = &target->endpoint[assigned_ep]; | |
2478 | endpoint->eid = assigned_ep; | |
2479 | if (endpoint->svc_id) { | |
2480 | status = -ENOMEM; | |
2481 | goto fail_tx; | |
2482 | } | |
2483 | ||
2484 | /* return assigned endpoint to caller */ | |
2485 | conn_resp->endpoint = assigned_ep; | |
2486 | conn_resp->len_max = max_msg_sz; | |
2487 | ||
2488 | /* setup the endpoint */ | |
2489 | ||
2490 | /* this marks the endpoint in use */ | |
2491 | endpoint->svc_id = conn_req->svc_id; | |
2492 | ||
2493 | endpoint->max_txq_depth = conn_req->max_txq_depth; | |
2494 | endpoint->len_max = max_msg_sz; | |
2495 | endpoint->ep_cb = conn_req->ep_cb; | |
2496 | endpoint->cred_dist.svc_id = conn_req->svc_id; | |
e8c39790 | 2497 | endpoint->cred_dist.htc_ep = endpoint; |
bdcd8170 KV |
2498 | endpoint->cred_dist.endpoint = assigned_ep; |
2499 | endpoint->cred_dist.cred_sz = target->tgt_cred_sz; | |
2500 | ||
0ea10f2b CN |
2501 | switch (endpoint->svc_id) { |
2502 | case WMI_DATA_BK_SVC: | |
2503 | endpoint->tx_drop_packet_threshold = MAX_DEF_COOKIE_NUM / 3; | |
2504 | break; | |
2505 | default: | |
2506 | endpoint->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM; | |
2507 | break; | |
2508 | } | |
2509 | ||
bdcd8170 KV |
2510 | if (conn_req->max_rxmsg_sz) { |
2511 | /* | |
2512 | * Override cred_per_msg calculation, this optimizes | |
2513 | * the credit-low indications since the host will actually | |
2514 | * issue smaller messages in the Send path. | |
2515 | */ | |
2516 | if (conn_req->max_rxmsg_sz > max_msg_sz) { | |
2517 | status = -ENOMEM; | |
2518 | goto fail_tx; | |
2519 | } | |
2520 | endpoint->cred_dist.cred_per_msg = | |
2521 | conn_req->max_rxmsg_sz / target->tgt_cred_sz; | |
2522 | } else | |
2523 | endpoint->cred_dist.cred_per_msg = | |
2524 | max_msg_sz / target->tgt_cred_sz; | |
2525 | ||
2526 | if (!endpoint->cred_dist.cred_per_msg) | |
2527 | endpoint->cred_dist.cred_per_msg = 1; | |
2528 | ||
2529 | /* save local connection flags */ | |
2530 | endpoint->conn_flags = conn_req->flags; | |
2531 | ||
2532 | fail_tx: | |
2533 | if (tx_pkt) | |
2534 | htc_reclaim_txctrl_buf(target, tx_pkt); | |
2535 | ||
2536 | if (rx_pkt) { | |
2537 | htc_rxpkt_reset(rx_pkt); | |
2538 | reclaim_rx_ctrl_buf(target, rx_pkt); | |
2539 | } | |
2540 | ||
2541 | return status; | |
2542 | } | |
2543 | ||
2544 | static void reset_ep_state(struct htc_target *target) | |
2545 | { | |
2546 | struct htc_endpoint *endpoint; | |
2547 | int i; | |
2548 | ||
2549 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
2550 | endpoint = &target->endpoint[i]; | |
2551 | memset(&endpoint->cred_dist, 0, sizeof(endpoint->cred_dist)); | |
2552 | endpoint->svc_id = 0; | |
2553 | endpoint->len_max = 0; | |
2554 | endpoint->max_txq_depth = 0; | |
2555 | memset(&endpoint->ep_st, 0, | |
2556 | sizeof(endpoint->ep_st)); | |
2557 | INIT_LIST_HEAD(&endpoint->rx_bufq); | |
2558 | INIT_LIST_HEAD(&endpoint->txq); | |
2559 | endpoint->target = target; | |
2560 | } | |
2561 | ||
2562 | /* reset distribution list */ | |
3c370398 | 2563 | /* FIXME: free existing entries */ |
bdcd8170 KV |
2564 | INIT_LIST_HEAD(&target->cred_dist_list); |
2565 | } | |
2566 | ||
ad226ec2 KV |
2567 | int ath6kl_htc_get_rxbuf_num(struct htc_target *target, |
2568 | enum htc_endpoint_id endpoint) | |
bdcd8170 KV |
2569 | { |
2570 | int num; | |
2571 | ||
2572 | spin_lock_bh(&target->rx_lock); | |
2573 | num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq)); | |
2574 | spin_unlock_bh(&target->rx_lock); | |
2575 | return num; | |
2576 | } | |
2577 | ||
2578 | static void htc_setup_msg_bndl(struct htc_target *target) | |
2579 | { | |
bdcd8170 KV |
2580 | /* limit what HTC can handle */ |
2581 | target->msg_per_bndl_max = min(HTC_HOST_MAX_MSG_PER_BUNDLE, | |
2582 | target->msg_per_bndl_max); | |
2583 | ||
50745af7 | 2584 | if (ath6kl_hif_enable_scatter(target->dev->ar)) { |
bdcd8170 KV |
2585 | target->msg_per_bndl_max = 0; |
2586 | return; | |
2587 | } | |
2588 | ||
2589 | /* limit bundle what the device layer can handle */ | |
50745af7 | 2590 | target->msg_per_bndl_max = min(target->max_scat_entries, |
bdcd8170 KV |
2591 | target->msg_per_bndl_max); |
2592 | ||
3ef987be | 2593 | ath6kl_dbg(ATH6KL_DBG_BOOT, |
471e92fd | 2594 | "htc bundling allowed msg_per_bndl_max %d\n", |
bdcd8170 KV |
2595 | target->msg_per_bndl_max); |
2596 | ||
2597 | /* Max rx bundle size is limited by the max tx bundle size */ | |
50745af7 | 2598 | target->max_rx_bndl_sz = target->max_xfer_szper_scatreq; |
bdcd8170 | 2599 | /* Max tx bundle size if limited by the extended mbox address range */ |
3b2f5e51 | 2600 | target->max_tx_bndl_sz = min(HIF_MBOX0_EXT_WIDTH, |
50745af7 | 2601 | target->max_xfer_szper_scatreq); |
bdcd8170 | 2602 | |
3ef987be | 2603 | ath6kl_dbg(ATH6KL_DBG_BOOT, "htc max_rx_bndl_sz %d max_tx_bndl_sz %d\n", |
3b2f5e51 | 2604 | target->max_rx_bndl_sz, target->max_tx_bndl_sz); |
bdcd8170 | 2605 | |
3b2f5e51 | 2606 | if (target->max_tx_bndl_sz) |
b29072cc CN |
2607 | /* tx_bndl_mask is enabled per AC, each has 1 bit */ |
2608 | target->tx_bndl_mask = (1 << WMM_NUM_AC) - 1; | |
bdcd8170 | 2609 | |
3b2f5e51 | 2610 | if (target->max_rx_bndl_sz) |
bdcd8170 KV |
2611 | target->rx_bndl_enable = true; |
2612 | ||
5be8824f | 2613 | if ((target->tgt_cred_sz % target->block_sz) != 0) { |
bdcd8170 KV |
2614 | ath6kl_warn("credit size: %d is not block aligned! Disabling send bundling\n", |
2615 | target->tgt_cred_sz); | |
2616 | ||
2617 | /* | |
2618 | * Disallow send bundling since the credit size is | |
2619 | * not aligned to a block size the I/O block | |
2620 | * padding will spill into the next credit buffer | |
2621 | * which is fatal. | |
2622 | */ | |
b29072cc | 2623 | target->tx_bndl_mask = 0; |
bdcd8170 KV |
2624 | } |
2625 | } | |
2626 | ||
ad226ec2 | 2627 | int ath6kl_htc_wait_target(struct htc_target *target) |
bdcd8170 KV |
2628 | { |
2629 | struct htc_packet *packet = NULL; | |
2630 | struct htc_ready_ext_msg *rdy_msg; | |
2631 | struct htc_service_connect_req connect; | |
2632 | struct htc_service_connect_resp resp; | |
2633 | int status; | |
2634 | ||
241b128b KV |
2635 | /* FIXME: remove once USB support is implemented */ |
2636 | if (target->dev->ar->hif_type == ATH6KL_HIF_TYPE_USB) { | |
2637 | ath6kl_err("HTC doesn't support USB yet. Patience!\n"); | |
2638 | return -EOPNOTSUPP; | |
2639 | } | |
2640 | ||
bdcd8170 KV |
2641 | /* we should be getting 1 control message that the target is ready */ |
2642 | packet = htc_wait_for_ctrl_msg(target); | |
2643 | ||
2644 | if (!packet) | |
2645 | return -ENOMEM; | |
2646 | ||
2647 | /* we controlled the buffer creation so it's properly aligned */ | |
2648 | rdy_msg = (struct htc_ready_ext_msg *)packet->buf; | |
2649 | ||
2650 | if ((le16_to_cpu(rdy_msg->ver2_0_info.msg_id) != HTC_MSG_READY_ID) || | |
2651 | (packet->act_len < sizeof(struct htc_ready_msg))) { | |
2652 | status = -ENOMEM; | |
2653 | goto fail_wait_target; | |
2654 | } | |
2655 | ||
2656 | if (!rdy_msg->ver2_0_info.cred_cnt || !rdy_msg->ver2_0_info.cred_sz) { | |
2657 | status = -ENOMEM; | |
2658 | goto fail_wait_target; | |
2659 | } | |
2660 | ||
2661 | target->tgt_creds = le16_to_cpu(rdy_msg->ver2_0_info.cred_cnt); | |
2662 | target->tgt_cred_sz = le16_to_cpu(rdy_msg->ver2_0_info.cred_sz); | |
2663 | ||
3ef987be | 2664 | ath6kl_dbg(ATH6KL_DBG_BOOT, |
471e92fd | 2665 | "htc target ready credits %d size %d\n", |
bdcd8170 KV |
2666 | target->tgt_creds, target->tgt_cred_sz); |
2667 | ||
2668 | /* check if this is an extended ready message */ | |
2669 | if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) { | |
2670 | /* this is an extended message */ | |
2671 | target->htc_tgt_ver = rdy_msg->htc_ver; | |
2672 | target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl; | |
2673 | } else { | |
2674 | /* legacy */ | |
2675 | target->htc_tgt_ver = HTC_VERSION_2P0; | |
2676 | target->msg_per_bndl_max = 0; | |
2677 | } | |
2678 | ||
3ef987be | 2679 | ath6kl_dbg(ATH6KL_DBG_BOOT, "htc using protocol %s (%d)\n", |
96f1fadc KV |
2680 | (target->htc_tgt_ver == HTC_VERSION_2P0) ? "2.0" : ">= 2.1", |
2681 | target->htc_tgt_ver); | |
bdcd8170 KV |
2682 | |
2683 | if (target->msg_per_bndl_max > 0) | |
2684 | htc_setup_msg_bndl(target); | |
2685 | ||
2686 | /* setup our pseudo HTC control endpoint connection */ | |
2687 | memset(&connect, 0, sizeof(connect)); | |
2688 | memset(&resp, 0, sizeof(resp)); | |
2689 | connect.ep_cb.rx = htc_ctrl_rx; | |
2690 | connect.ep_cb.rx_refill = NULL; | |
2691 | connect.ep_cb.tx_full = NULL; | |
2692 | connect.max_txq_depth = NUM_CONTROL_BUFFERS; | |
2693 | connect.svc_id = HTC_CTRL_RSVD_SVC; | |
2694 | ||
2695 | /* connect fake service */ | |
ad226ec2 | 2696 | status = ath6kl_htc_conn_service((void *)target, &connect, &resp); |
bdcd8170 KV |
2697 | |
2698 | if (status) | |
4e3d54c7 KV |
2699 | /* |
2700 | * FIXME: this call doesn't make sense, the caller should | |
2701 | * call ath6kl_htc_cleanup() when it wants remove htc | |
2702 | */ | |
bdcd8170 KV |
2703 | ath6kl_hif_cleanup_scatter(target->dev->ar); |
2704 | ||
2705 | fail_wait_target: | |
2706 | if (packet) { | |
2707 | htc_rxpkt_reset(packet); | |
2708 | reclaim_rx_ctrl_buf(target, packet); | |
2709 | } | |
2710 | ||
2711 | return status; | |
2712 | } | |
2713 | ||
2714 | /* | |
2715 | * Start HTC, enable interrupts and let the target know | |
2716 | * host has finished setup. | |
2717 | */ | |
ad226ec2 | 2718 | int ath6kl_htc_start(struct htc_target *target) |
bdcd8170 KV |
2719 | { |
2720 | struct htc_packet *packet; | |
2721 | int status; | |
2722 | ||
5fe4dffb KV |
2723 | memset(&target->dev->irq_proc_reg, 0, |
2724 | sizeof(target->dev->irq_proc_reg)); | |
2725 | ||
bdcd8170 | 2726 | /* Disable interrupts at the chip level */ |
8e8ddb2b | 2727 | ath6kl_hif_disable_intrs(target->dev); |
bdcd8170 KV |
2728 | |
2729 | target->htc_flags = 0; | |
2730 | target->rx_st_flags = 0; | |
2731 | ||
2732 | /* Push control receive buffers into htc control endpoint */ | |
2733 | while ((packet = htc_get_control_buf(target, false)) != NULL) { | |
2734 | status = htc_add_rxbuf(target, packet); | |
2735 | if (status) | |
2736 | return status; | |
2737 | } | |
2738 | ||
2739 | /* NOTE: the first entry in the distribution list is ENDPOINT_0 */ | |
3c370398 | 2740 | ath6kl_credit_init(target->credit_info, &target->cred_dist_list, |
fa99e963 | 2741 | target->tgt_creds); |
bdcd8170 KV |
2742 | |
2743 | dump_cred_dist_stats(target); | |
2744 | ||
2745 | /* Indicate to the target of the setup completion */ | |
2746 | status = htc_setup_tx_complete(target); | |
2747 | ||
2748 | if (status) | |
2749 | return status; | |
2750 | ||
2751 | /* unmask interrupts */ | |
8e8ddb2b | 2752 | status = ath6kl_hif_unmask_intrs(target->dev); |
bdcd8170 KV |
2753 | |
2754 | if (status) | |
ad226ec2 | 2755 | ath6kl_htc_stop(target); |
bdcd8170 KV |
2756 | |
2757 | return status; | |
2758 | } | |
2759 | ||
8a810916 KV |
2760 | static int ath6kl_htc_reset(struct htc_target *target) |
2761 | { | |
2762 | u32 block_size, ctrl_bufsz; | |
2763 | struct htc_packet *packet; | |
2764 | int i; | |
2765 | ||
2766 | reset_ep_state(target); | |
2767 | ||
2768 | block_size = target->dev->ar->mbox_info.block_size; | |
2769 | ||
2770 | ctrl_bufsz = (block_size > HTC_MAX_CTRL_MSG_LEN) ? | |
2771 | (block_size + HTC_HDR_LENGTH) : | |
2772 | (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH); | |
2773 | ||
2774 | for (i = 0; i < NUM_CONTROL_BUFFERS; i++) { | |
2775 | packet = kzalloc(sizeof(*packet), GFP_KERNEL); | |
2776 | if (!packet) | |
2777 | return -ENOMEM; | |
2778 | ||
2779 | packet->buf_start = kzalloc(ctrl_bufsz, GFP_KERNEL); | |
2780 | if (!packet->buf_start) { | |
2781 | kfree(packet); | |
2782 | return -ENOMEM; | |
2783 | } | |
2784 | ||
2785 | packet->buf_len = ctrl_bufsz; | |
2786 | if (i < NUM_CONTROL_RX_BUFFERS) { | |
2787 | packet->act_len = 0; | |
2788 | packet->buf = packet->buf_start; | |
2789 | packet->endpoint = ENDPOINT_0; | |
2790 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
2791 | } else | |
2792 | list_add_tail(&packet->list, &target->free_ctrl_txbuf); | |
2793 | } | |
2794 | ||
2795 | return 0; | |
2796 | } | |
2797 | ||
bdcd8170 | 2798 | /* htc_stop: stop interrupt reception, and flush all queued buffers */ |
ad226ec2 | 2799 | void ath6kl_htc_stop(struct htc_target *target) |
bdcd8170 KV |
2800 | { |
2801 | spin_lock_bh(&target->htc_lock); | |
2802 | target->htc_flags |= HTC_OP_STATE_STOPPING; | |
2803 | spin_unlock_bh(&target->htc_lock); | |
2804 | ||
2805 | /* | |
2806 | * Masking interrupts is a synchronous operation, when this | |
2807 | * function returns all pending HIF I/O has completed, we can | |
2808 | * safely flush the queues. | |
2809 | */ | |
8e8ddb2b | 2810 | ath6kl_hif_mask_intrs(target->dev); |
bdcd8170 | 2811 | |
ad226ec2 | 2812 | ath6kl_htc_flush_txep_all(target); |
bdcd8170 | 2813 | |
ad226ec2 | 2814 | ath6kl_htc_flush_rx_buf(target); |
bdcd8170 | 2815 | |
8a810916 | 2816 | ath6kl_htc_reset(target); |
bdcd8170 KV |
2817 | } |
2818 | ||
ad226ec2 | 2819 | void *ath6kl_htc_create(struct ath6kl *ar) |
bdcd8170 KV |
2820 | { |
2821 | struct htc_target *target = NULL; | |
8a810916 | 2822 | int status = 0; |
bdcd8170 KV |
2823 | |
2824 | target = kzalloc(sizeof(*target), GFP_KERNEL); | |
2825 | if (!target) { | |
2826 | ath6kl_err("unable to allocate memory\n"); | |
2827 | return NULL; | |
2828 | } | |
2829 | ||
2830 | target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); | |
2831 | if (!target->dev) { | |
2832 | ath6kl_err("unable to allocate memory\n"); | |
2833 | status = -ENOMEM; | |
8a810916 | 2834 | goto err_htc_cleanup; |
bdcd8170 KV |
2835 | } |
2836 | ||
2837 | spin_lock_init(&target->htc_lock); | |
2838 | spin_lock_init(&target->rx_lock); | |
2839 | spin_lock_init(&target->tx_lock); | |
2840 | ||
2841 | INIT_LIST_HEAD(&target->free_ctrl_txbuf); | |
2842 | INIT_LIST_HEAD(&target->free_ctrl_rxbuf); | |
2843 | INIT_LIST_HEAD(&target->cred_dist_list); | |
2844 | ||
2845 | target->dev->ar = ar; | |
2846 | target->dev->htc_cnxt = target; | |
bdcd8170 KV |
2847 | target->ep_waiting = ENDPOINT_MAX; |
2848 | ||
8e8ddb2b | 2849 | status = ath6kl_hif_setup(target->dev); |
bdcd8170 | 2850 | if (status) |
8a810916 | 2851 | goto err_htc_cleanup; |
bdcd8170 | 2852 | |
8a810916 KV |
2853 | status = ath6kl_htc_reset(target); |
2854 | if (status) | |
2855 | goto err_htc_cleanup; | |
bdcd8170 | 2856 | |
8a810916 | 2857 | return target; |
bdcd8170 | 2858 | |
8a810916 KV |
2859 | err_htc_cleanup: |
2860 | ath6kl_htc_cleanup(target); | |
bdcd8170 | 2861 | |
8a810916 | 2862 | return NULL; |
bdcd8170 KV |
2863 | } |
2864 | ||
2865 | /* cleanup the HTC instance */ | |
ad226ec2 | 2866 | void ath6kl_htc_cleanup(struct htc_target *target) |
bdcd8170 KV |
2867 | { |
2868 | struct htc_packet *packet, *tmp_packet; | |
2869 | ||
241b128b KV |
2870 | /* FIXME: remove check once USB support is implemented */ |
2871 | if (target->dev->ar->hif_type != ATH6KL_HIF_TYPE_USB) | |
2872 | ath6kl_hif_cleanup_scatter(target->dev->ar); | |
bdcd8170 KV |
2873 | |
2874 | list_for_each_entry_safe(packet, tmp_packet, | |
96f1fadc | 2875 | &target->free_ctrl_txbuf, list) { |
bdcd8170 KV |
2876 | list_del(&packet->list); |
2877 | kfree(packet->buf_start); | |
2878 | kfree(packet); | |
2879 | } | |
2880 | ||
2881 | list_for_each_entry_safe(packet, tmp_packet, | |
96f1fadc | 2882 | &target->free_ctrl_rxbuf, list) { |
bdcd8170 KV |
2883 | list_del(&packet->list); |
2884 | kfree(packet->buf_start); | |
2885 | kfree(packet); | |
2886 | } | |
2887 | ||
2888 | kfree(target->dev); | |
2889 | kfree(target); | |
2890 | } |