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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" | |
4771979a KV |
22 | #include "trace.h" |
23 | ||
bdcd8170 KV |
24 | #include <asm/unaligned.h> |
25 | ||
26 | #define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask)) | |
27 | ||
e76ac2bf KV |
28 | static void ath6kl_htc_mbox_cleanup(struct htc_target *target); |
29 | static void ath6kl_htc_mbox_stop(struct htc_target *target); | |
30 | static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target, | |
31 | struct list_head *pkt_queue); | |
32 | static void ath6kl_htc_set_credit_dist(struct htc_target *target, | |
33 | struct ath6kl_htc_credit_info *cred_info, | |
34 | u16 svc_pri_order[], int len); | |
35 | ||
b29072cc CN |
36 | /* threshold to re-enable Tx bundling for an AC*/ |
37 | #define TX_RESUME_BUNDLE_THRESHOLD 1500 | |
38 | ||
f2f92195 | 39 | /* Functions for Tx credit handling */ |
cb64a610 KV |
40 | static void ath6kl_credit_deposit(struct ath6kl_htc_credit_info *cred_info, |
41 | struct htc_endpoint_credit_dist *ep_dist, | |
42 | int credits) | |
f2f92195 | 43 | { |
02f0d6fc KV |
44 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit deposit ep %d credits %d\n", |
45 | ep_dist->endpoint, credits); | |
46 | ||
f2f92195 KV |
47 | ep_dist->credits += credits; |
48 | ep_dist->cred_assngd += credits; | |
49 | cred_info->cur_free_credits -= credits; | |
50 | } | |
51 | ||
52 | static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, | |
53 | struct list_head *ep_list, | |
54 | int tot_credits) | |
55 | { | |
56 | struct htc_endpoint_credit_dist *cur_ep_dist; | |
57 | int count; | |
58 | ||
02f0d6fc KV |
59 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit init total %d\n", tot_credits); |
60 | ||
f2f92195 KV |
61 | cred_info->cur_free_credits = tot_credits; |
62 | cred_info->total_avail_credits = tot_credits; | |
63 | ||
64 | list_for_each_entry(cur_ep_dist, ep_list, list) { | |
65 | if (cur_ep_dist->endpoint == ENDPOINT_0) | |
66 | continue; | |
67 | ||
68 | cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; | |
69 | ||
70 | if (tot_credits > 4) { | |
71 | if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || | |
72 | (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { | |
cb64a610 KV |
73 | ath6kl_credit_deposit(cred_info, |
74 | cur_ep_dist, | |
75 | cur_ep_dist->cred_min); | |
f2f92195 KV |
76 | cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; |
77 | } | |
78 | } | |
79 | ||
80 | if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { | |
cb64a610 KV |
81 | ath6kl_credit_deposit(cred_info, cur_ep_dist, |
82 | cur_ep_dist->cred_min); | |
f2f92195 KV |
83 | /* |
84 | * Control service is always marked active, it | |
85 | * never goes inactive EVER. | |
86 | */ | |
87 | cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; | |
f5f7ba25 | 88 | } |
f2f92195 KV |
89 | |
90 | /* | |
91 | * Streams have to be created (explicit | implicit) for all | |
92 | * kinds of traffic. BE endpoints are also inactive in the | |
93 | * beginning. When BE traffic starts it creates implicit | |
94 | * streams that redistributes credits. | |
95 | * | |
96 | * Note: all other endpoints have minimums set but are | |
97 | * initially given NO credits. credits will be distributed | |
98 | * as traffic activity demands | |
99 | */ | |
100 | } | |
101 | ||
f5f7ba25 KF |
102 | /* |
103 | * For ath6kl_credit_seek function, | |
104 | * it use list_for_each_entry_reverse to walk around the whole ep list. | |
105 | * Therefore assign this lowestpri_ep_dist after walk around the ep_list | |
106 | */ | |
107 | cred_info->lowestpri_ep_dist = cur_ep_dist->list; | |
108 | ||
f2f92195 KV |
109 | WARN_ON(cred_info->cur_free_credits <= 0); |
110 | ||
111 | list_for_each_entry(cur_ep_dist, ep_list, list) { | |
112 | if (cur_ep_dist->endpoint == ENDPOINT_0) | |
113 | continue; | |
114 | ||
a5d8f9df | 115 | if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { |
f2f92195 | 116 | cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; |
a5d8f9df | 117 | } else { |
f2f92195 KV |
118 | /* |
119 | * For the remaining data endpoints, we assume that | |
120 | * each cred_per_msg are the same. We use a simple | |
121 | * calculation here, we take the remaining credits | |
122 | * and determine how many max messages this can | |
123 | * cover and then set each endpoint's normal value | |
124 | * equal to 3/4 this amount. | |
125 | */ | |
126 | count = (cred_info->cur_free_credits / | |
127 | cur_ep_dist->cred_per_msg) | |
128 | * cur_ep_dist->cred_per_msg; | |
129 | count = (count * 3) >> 2; | |
130 | count = max(count, cur_ep_dist->cred_per_msg); | |
131 | cur_ep_dist->cred_norm = count; | |
f2f92195 | 132 | } |
02f0d6fc KV |
133 | |
134 | ath6kl_dbg(ATH6KL_DBG_CREDIT, | |
135 | "credit ep %d svc_id %d credits %d per_msg %d norm %d min %d\n", | |
136 | cur_ep_dist->endpoint, | |
137 | cur_ep_dist->svc_id, | |
138 | cur_ep_dist->credits, | |
139 | cur_ep_dist->cred_per_msg, | |
140 | cur_ep_dist->cred_norm, | |
141 | cur_ep_dist->cred_min); | |
f2f92195 KV |
142 | } |
143 | } | |
144 | ||
145 | /* initialize and setup credit distribution */ | |
e76ac2bf KV |
146 | static int ath6kl_htc_mbox_credit_setup(struct htc_target *htc_target, |
147 | struct ath6kl_htc_credit_info *cred_info) | |
f2f92195 KV |
148 | { |
149 | u16 servicepriority[5]; | |
150 | ||
151 | memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info)); | |
152 | ||
153 | servicepriority[0] = WMI_CONTROL_SVC; /* highest */ | |
154 | servicepriority[1] = WMI_DATA_VO_SVC; | |
155 | servicepriority[2] = WMI_DATA_VI_SVC; | |
156 | servicepriority[3] = WMI_DATA_BE_SVC; | |
157 | servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ | |
158 | ||
159 | /* set priority list */ | |
048f24f6 | 160 | ath6kl_htc_set_credit_dist(htc_target, cred_info, servicepriority, 5); |
f2f92195 KV |
161 | |
162 | return 0; | |
163 | } | |
164 | ||
165 | /* reduce an ep's credits back to a set limit */ | |
cb64a610 KV |
166 | static void ath6kl_credit_reduce(struct ath6kl_htc_credit_info *cred_info, |
167 | struct htc_endpoint_credit_dist *ep_dist, | |
168 | int limit) | |
f2f92195 KV |
169 | { |
170 | int credits; | |
171 | ||
02f0d6fc KV |
172 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit reduce ep %d limit %d\n", |
173 | ep_dist->endpoint, limit); | |
174 | ||
f2f92195 KV |
175 | ep_dist->cred_assngd = limit; |
176 | ||
177 | if (ep_dist->credits <= limit) | |
178 | return; | |
179 | ||
180 | credits = ep_dist->credits - limit; | |
181 | ep_dist->credits -= credits; | |
182 | cred_info->cur_free_credits += credits; | |
183 | } | |
184 | ||
185 | static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info, | |
186 | struct list_head *epdist_list) | |
187 | { | |
05aab177 | 188 | struct htc_endpoint_credit_dist *cur_list; |
f2f92195 | 189 | |
05aab177 KV |
190 | list_for_each_entry(cur_list, epdist_list, list) { |
191 | if (cur_list->endpoint == ENDPOINT_0) | |
f2f92195 KV |
192 | continue; |
193 | ||
05aab177 KV |
194 | if (cur_list->cred_to_dist > 0) { |
195 | cur_list->credits += cur_list->cred_to_dist; | |
196 | cur_list->cred_to_dist = 0; | |
197 | ||
198 | if (cur_list->credits > cur_list->cred_assngd) | |
cb64a610 | 199 | ath6kl_credit_reduce(cred_info, |
05aab177 KV |
200 | cur_list, |
201 | cur_list->cred_assngd); | |
f2f92195 | 202 | |
05aab177 KV |
203 | if (cur_list->credits > cur_list->cred_norm) |
204 | ath6kl_credit_reduce(cred_info, cur_list, | |
205 | cur_list->cred_norm); | |
f2f92195 | 206 | |
05aab177 KV |
207 | if (!(cur_list->dist_flags & HTC_EP_ACTIVE)) { |
208 | if (cur_list->txq_depth == 0) | |
cb64a610 | 209 | ath6kl_credit_reduce(cred_info, |
05aab177 | 210 | cur_list, 0); |
f2f92195 KV |
211 | } |
212 | } | |
213 | } | |
214 | } | |
215 | ||
216 | /* | |
217 | * HTC has an endpoint that needs credits, ep_dist is the endpoint in | |
218 | * question. | |
219 | */ | |
cb64a610 | 220 | static void ath6kl_credit_seek(struct ath6kl_htc_credit_info *cred_info, |
f2f92195 KV |
221 | struct htc_endpoint_credit_dist *ep_dist) |
222 | { | |
223 | struct htc_endpoint_credit_dist *curdist_list; | |
224 | int credits = 0; | |
225 | int need; | |
226 | ||
227 | if (ep_dist->svc_id == WMI_CONTROL_SVC) | |
228 | goto out; | |
229 | ||
230 | if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || | |
231 | (ep_dist->svc_id == WMI_DATA_VO_SVC)) | |
232 | if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) | |
233 | goto out; | |
234 | ||
235 | /* | |
236 | * For all other services, we follow a simple algorithm of: | |
237 | * | |
238 | * 1. checking the free pool for credits | |
239 | * 2. checking lower priority endpoints for credits to take | |
240 | */ | |
241 | ||
242 | credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); | |
243 | ||
244 | if (credits >= ep_dist->seek_cred) | |
245 | goto out; | |
246 | ||
247 | /* | |
248 | * We don't have enough in the free pool, try taking away from | |
249 | * lower priority services The rule for taking away credits: | |
250 | * | |
251 | * 1. Only take from lower priority endpoints | |
252 | * 2. Only take what is allocated above the minimum (never | |
253 | * starve an endpoint completely) | |
254 | * 3. Only take what you need. | |
255 | */ | |
256 | ||
257 | list_for_each_entry_reverse(curdist_list, | |
258 | &cred_info->lowestpri_ep_dist, | |
259 | list) { | |
260 | if (curdist_list == ep_dist) | |
261 | break; | |
262 | ||
263 | need = ep_dist->seek_cred - cred_info->cur_free_credits; | |
264 | ||
265 | if ((curdist_list->cred_assngd - need) >= | |
266 | curdist_list->cred_min) { | |
267 | /* | |
268 | * The current one has been allocated more than | |
269 | * it's minimum and it has enough credits assigned | |
270 | * above it's minimum to fulfill our need try to | |
271 | * take away just enough to fulfill our need. | |
272 | */ | |
cb64a610 KV |
273 | ath6kl_credit_reduce(cred_info, curdist_list, |
274 | curdist_list->cred_assngd - need); | |
f2f92195 KV |
275 | |
276 | if (cred_info->cur_free_credits >= | |
277 | ep_dist->seek_cred) | |
278 | break; | |
279 | } | |
280 | ||
281 | if (curdist_list->endpoint == ENDPOINT_0) | |
282 | break; | |
283 | } | |
284 | ||
285 | credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); | |
286 | ||
287 | out: | |
288 | /* did we find some credits? */ | |
289 | if (credits) | |
cb64a610 | 290 | ath6kl_credit_deposit(cred_info, ep_dist, credits); |
f2f92195 KV |
291 | |
292 | ep_dist->seek_cred = 0; | |
293 | } | |
294 | ||
295 | /* redistribute credits based on activity change */ | |
cb64a610 KV |
296 | static void ath6kl_credit_redistribute(struct ath6kl_htc_credit_info *info, |
297 | struct list_head *ep_dist_list) | |
f2f92195 KV |
298 | { |
299 | struct htc_endpoint_credit_dist *curdist_list; | |
300 | ||
301 | list_for_each_entry(curdist_list, ep_dist_list, list) { | |
302 | if (curdist_list->endpoint == ENDPOINT_0) | |
303 | continue; | |
304 | ||
305 | if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || | |
306 | (curdist_list->svc_id == WMI_DATA_BE_SVC)) | |
307 | curdist_list->dist_flags |= HTC_EP_ACTIVE; | |
308 | ||
309 | if ((curdist_list->svc_id != WMI_CONTROL_SVC) && | |
310 | !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { | |
311 | if (curdist_list->txq_depth == 0) | |
cb64a610 | 312 | ath6kl_credit_reduce(info, curdist_list, 0); |
f2f92195 | 313 | else |
cb64a610 KV |
314 | ath6kl_credit_reduce(info, |
315 | curdist_list, | |
316 | curdist_list->cred_min); | |
f2f92195 KV |
317 | } |
318 | } | |
319 | } | |
320 | ||
321 | /* | |
322 | * | |
323 | * This function is invoked whenever endpoints require credit | |
324 | * distributions. A lock is held while this function is invoked, this | |
325 | * function shall NOT block. The ep_dist_list is a list of distribution | |
326 | * structures in prioritized order as defined by the call to the | |
327 | * htc_set_credit_dist() api. | |
328 | */ | |
329 | static void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info, | |
330 | struct list_head *ep_dist_list, | |
331 | enum htc_credit_dist_reason reason) | |
332 | { | |
333 | switch (reason) { | |
334 | case HTC_CREDIT_DIST_SEND_COMPLETE: | |
335 | ath6kl_credit_update(cred_info, ep_dist_list); | |
336 | break; | |
337 | case HTC_CREDIT_DIST_ACTIVITY_CHANGE: | |
cb64a610 | 338 | ath6kl_credit_redistribute(cred_info, ep_dist_list); |
f2f92195 KV |
339 | break; |
340 | default: | |
341 | break; | |
342 | } | |
343 | ||
344 | WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); | |
345 | WARN_ON(cred_info->cur_free_credits < 0); | |
346 | } | |
347 | ||
dfa0104c | 348 | static void ath6kl_htc_tx_buf_align(u8 **buf, unsigned long len) |
94e532d1 VT |
349 | { |
350 | u8 *align_addr; | |
351 | ||
352 | if (!IS_ALIGNED((unsigned long) *buf, 4)) { | |
353 | align_addr = PTR_ALIGN(*buf - 4, 4); | |
354 | memmove(align_addr, *buf, len); | |
355 | *buf = align_addr; | |
356 | } | |
357 | } | |
358 | ||
dfa0104c KV |
359 | static void ath6kl_htc_tx_prep_pkt(struct htc_packet *packet, u8 flags, |
360 | int ctrl0, int ctrl1) | |
bdcd8170 KV |
361 | { |
362 | struct htc_frame_hdr *hdr; | |
363 | ||
364 | packet->buf -= HTC_HDR_LENGTH; | |
365 | hdr = (struct htc_frame_hdr *)packet->buf; | |
366 | ||
367 | /* Endianess? */ | |
368 | put_unaligned((u16)packet->act_len, &hdr->payld_len); | |
369 | hdr->flags = flags; | |
370 | hdr->eid = packet->endpoint; | |
371 | hdr->ctrl[0] = ctrl0; | |
372 | hdr->ctrl[1] = ctrl1; | |
373 | } | |
374 | ||
375 | static void htc_reclaim_txctrl_buf(struct htc_target *target, | |
376 | struct htc_packet *pkt) | |
377 | { | |
378 | spin_lock_bh(&target->htc_lock); | |
379 | list_add_tail(&pkt->list, &target->free_ctrl_txbuf); | |
380 | spin_unlock_bh(&target->htc_lock); | |
381 | } | |
382 | ||
383 | static struct htc_packet *htc_get_control_buf(struct htc_target *target, | |
384 | bool tx) | |
385 | { | |
386 | struct htc_packet *packet = NULL; | |
387 | struct list_head *buf_list; | |
388 | ||
389 | buf_list = tx ? &target->free_ctrl_txbuf : &target->free_ctrl_rxbuf; | |
390 | ||
391 | spin_lock_bh(&target->htc_lock); | |
392 | ||
393 | if (list_empty(buf_list)) { | |
394 | spin_unlock_bh(&target->htc_lock); | |
395 | return NULL; | |
396 | } | |
397 | ||
398 | packet = list_first_entry(buf_list, struct htc_packet, list); | |
399 | list_del(&packet->list); | |
400 | spin_unlock_bh(&target->htc_lock); | |
401 | ||
402 | if (tx) | |
403 | packet->buf = packet->buf_start + HTC_HDR_LENGTH; | |
404 | ||
405 | return packet; | |
406 | } | |
407 | ||
408 | static void htc_tx_comp_update(struct htc_target *target, | |
409 | struct htc_endpoint *endpoint, | |
410 | struct htc_packet *packet) | |
411 | { | |
412 | packet->completion = NULL; | |
413 | packet->buf += HTC_HDR_LENGTH; | |
414 | ||
415 | if (!packet->status) | |
416 | return; | |
417 | ||
418 | ath6kl_err("req failed (status:%d, ep:%d, len:%d creds:%d)\n", | |
419 | packet->status, packet->endpoint, packet->act_len, | |
420 | packet->info.tx.cred_used); | |
421 | ||
422 | /* on failure to submit, reclaim credits for this packet */ | |
423 | spin_lock_bh(&target->tx_lock); | |
424 | endpoint->cred_dist.cred_to_dist += | |
425 | packet->info.tx.cred_used; | |
426 | endpoint->cred_dist.txq_depth = get_queue_depth(&endpoint->txq); | |
427 | ||
471e92fd | 428 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx ctxt 0x%p dist 0x%p\n", |
3c370398 | 429 | target->credit_info, &target->cred_dist_list); |
bdcd8170 | 430 | |
3c370398 KV |
431 | ath6kl_credit_distribute(target->credit_info, |
432 | &target->cred_dist_list, | |
433 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
bdcd8170 KV |
434 | |
435 | spin_unlock_bh(&target->tx_lock); | |
436 | } | |
437 | ||
438 | static void htc_tx_complete(struct htc_endpoint *endpoint, | |
439 | struct list_head *txq) | |
440 | { | |
441 | if (list_empty(txq)) | |
442 | return; | |
443 | ||
ebf29c95 | 444 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 445 | "htc tx complete ep %d pkts %d\n", |
bdcd8170 KV |
446 | endpoint->eid, get_queue_depth(txq)); |
447 | ||
63de1112 | 448 | ath6kl_tx_complete(endpoint->target, txq); |
bdcd8170 KV |
449 | } |
450 | ||
451 | static void htc_tx_comp_handler(struct htc_target *target, | |
452 | struct htc_packet *packet) | |
453 | { | |
454 | struct htc_endpoint *endpoint = &target->endpoint[packet->endpoint]; | |
455 | struct list_head container; | |
456 | ||
2387f0dc KV |
457 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx complete seqno %d\n", |
458 | packet->info.tx.seqno); | |
459 | ||
bdcd8170 KV |
460 | htc_tx_comp_update(target, endpoint, packet); |
461 | INIT_LIST_HEAD(&container); | |
462 | list_add_tail(&packet->list, &container); | |
463 | /* do completion */ | |
464 | htc_tx_complete(endpoint, &container); | |
465 | } | |
466 | ||
e041c7f9 VT |
467 | static void htc_async_tx_scat_complete(struct htc_target *target, |
468 | struct hif_scatter_req *scat_req) | |
bdcd8170 | 469 | { |
e041c7f9 | 470 | struct htc_endpoint *endpoint; |
bdcd8170 KV |
471 | struct htc_packet *packet; |
472 | struct list_head tx_compq; | |
473 | int i; | |
474 | ||
475 | INIT_LIST_HEAD(&tx_compq); | |
476 | ||
ebf29c95 | 477 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
478 | "htc tx scat complete len %d entries %d\n", |
479 | scat_req->len, scat_req->scat_entries); | |
bdcd8170 KV |
480 | |
481 | if (scat_req->status) | |
482 | ath6kl_err("send scatter req failed: %d\n", scat_req->status); | |
483 | ||
e041c7f9 VT |
484 | packet = scat_req->scat_list[0].packet; |
485 | endpoint = &target->endpoint[packet->endpoint]; | |
486 | ||
bdcd8170 KV |
487 | /* walk through the scatter list and process */ |
488 | for (i = 0; i < scat_req->scat_entries; i++) { | |
489 | packet = scat_req->scat_list[i].packet; | |
490 | if (!packet) { | |
491 | WARN_ON(1); | |
492 | return; | |
493 | } | |
494 | ||
495 | packet->status = scat_req->status; | |
496 | htc_tx_comp_update(target, endpoint, packet); | |
497 | list_add_tail(&packet->list, &tx_compq); | |
498 | } | |
499 | ||
500 | /* free scatter request */ | |
501 | hif_scatter_req_add(target->dev->ar, scat_req); | |
502 | ||
503 | /* complete all packets */ | |
504 | htc_tx_complete(endpoint, &tx_compq); | |
505 | } | |
506 | ||
dfa0104c KV |
507 | static int ath6kl_htc_tx_issue(struct htc_target *target, |
508 | struct htc_packet *packet) | |
bdcd8170 KV |
509 | { |
510 | int status; | |
511 | bool sync = false; | |
512 | u32 padded_len, send_len; | |
513 | ||
514 | if (!packet->completion) | |
515 | sync = true; | |
516 | ||
517 | send_len = packet->act_len + HTC_HDR_LENGTH; | |
518 | ||
5be8824f | 519 | padded_len = CALC_TXRX_PADDED_LEN(target, send_len); |
bdcd8170 | 520 | |
ebf29c95 | 521 | ath6kl_dbg(ATH6KL_DBG_HTC, |
2387f0dc KV |
522 | "htc tx issue len %d seqno %d padded_len %d mbox 0x%X %s\n", |
523 | send_len, packet->info.tx.seqno, padded_len, | |
471e92fd KV |
524 | target->dev->ar->mbox_info.htc_addr, |
525 | sync ? "sync" : "async"); | |
bdcd8170 KV |
526 | |
527 | if (sync) { | |
528 | status = hif_read_write_sync(target->dev->ar, | |
529 | target->dev->ar->mbox_info.htc_addr, | |
530 | packet->buf, padded_len, | |
531 | HIF_WR_SYNC_BLOCK_INC); | |
532 | ||
533 | packet->status = status; | |
65d2bb14 | 534 | packet->buf += HTC_HDR_LENGTH; |
bdcd8170 KV |
535 | } else |
536 | status = hif_write_async(target->dev->ar, | |
537 | target->dev->ar->mbox_info.htc_addr, | |
538 | packet->buf, padded_len, | |
539 | HIF_WR_ASYNC_BLOCK_INC, packet); | |
540 | ||
4771979a KV |
541 | trace_ath6kl_htc_tx(status, packet->endpoint, packet->buf, send_len); |
542 | ||
bdcd8170 KV |
543 | return status; |
544 | } | |
545 | ||
546 | static int htc_check_credits(struct htc_target *target, | |
547 | struct htc_endpoint *ep, u8 *flags, | |
548 | enum htc_endpoint_id eid, unsigned int len, | |
549 | int *req_cred) | |
550 | { | |
bdcd8170 KV |
551 | *req_cred = (len > target->tgt_cred_sz) ? |
552 | DIV_ROUND_UP(len, target->tgt_cred_sz) : 1; | |
553 | ||
02f0d6fc | 554 | ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit check need %d got %d\n", |
bdcd8170 KV |
555 | *req_cred, ep->cred_dist.credits); |
556 | ||
557 | if (ep->cred_dist.credits < *req_cred) { | |
558 | if (eid == ENDPOINT_0) | |
559 | return -EINVAL; | |
560 | ||
561 | /* Seek more credits */ | |
562 | ep->cred_dist.seek_cred = *req_cred - ep->cred_dist.credits; | |
563 | ||
cb64a610 | 564 | ath6kl_credit_seek(target->credit_info, &ep->cred_dist); |
bdcd8170 KV |
565 | |
566 | ep->cred_dist.seek_cred = 0; | |
567 | ||
568 | if (ep->cred_dist.credits < *req_cred) { | |
02f0d6fc KV |
569 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
570 | "credit not found for ep %d\n", | |
bdcd8170 KV |
571 | eid); |
572 | return -EINVAL; | |
573 | } | |
574 | } | |
575 | ||
576 | ep->cred_dist.credits -= *req_cred; | |
577 | ep->ep_st.cred_cosumd += *req_cred; | |
578 | ||
579 | /* When we are getting low on credits, ask for more */ | |
580 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
581 | ep->cred_dist.seek_cred = | |
582 | ep->cred_dist.cred_per_msg - ep->cred_dist.credits; | |
583 | ||
cb64a610 | 584 | ath6kl_credit_seek(target->credit_info, &ep->cred_dist); |
bdcd8170 KV |
585 | |
586 | /* see if we were successful in getting more */ | |
587 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
588 | /* tell the target we need credits ASAP! */ | |
589 | *flags |= HTC_FLAGS_NEED_CREDIT_UPDATE; | |
590 | ep->ep_st.cred_low_indicate += 1; | |
02f0d6fc KV |
591 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
592 | "credit we need credits asap\n"); | |
bdcd8170 KV |
593 | } |
594 | } | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
dfa0104c KV |
599 | static void ath6kl_htc_tx_pkts_get(struct htc_target *target, |
600 | struct htc_endpoint *endpoint, | |
601 | struct list_head *queue) | |
bdcd8170 KV |
602 | { |
603 | int req_cred; | |
604 | u8 flags; | |
605 | struct htc_packet *packet; | |
606 | unsigned int len; | |
607 | ||
608 | while (true) { | |
bdcd8170 KV |
609 | flags = 0; |
610 | ||
611 | if (list_empty(&endpoint->txq)) | |
612 | break; | |
613 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
614 | list); | |
615 | ||
ebf29c95 | 616 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
617 | "htc tx got packet 0x%p queue depth %d\n", |
618 | packet, get_queue_depth(&endpoint->txq)); | |
bdcd8170 | 619 | |
5be8824f | 620 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
621 | packet->act_len + HTC_HDR_LENGTH); |
622 | ||
623 | if (htc_check_credits(target, endpoint, &flags, | |
624 | packet->endpoint, len, &req_cred)) | |
625 | break; | |
626 | ||
627 | /* now we can fully move onto caller's queue */ | |
628 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
629 | list); | |
630 | list_move_tail(&packet->list, queue); | |
631 | ||
632 | /* save the number of credits this packet consumed */ | |
633 | packet->info.tx.cred_used = req_cred; | |
634 | ||
635 | /* all TX packets are handled asynchronously */ | |
636 | packet->completion = htc_tx_comp_handler; | |
637 | packet->context = target; | |
638 | endpoint->ep_st.tx_issued += 1; | |
639 | ||
640 | /* save send flags */ | |
641 | packet->info.tx.flags = flags; | |
642 | packet->info.tx.seqno = endpoint->seqno; | |
643 | endpoint->seqno++; | |
644 | } | |
645 | } | |
646 | ||
647 | /* See if the padded tx length falls on a credit boundary */ | |
648 | static int htc_get_credit_padding(unsigned int cred_sz, int *len, | |
649 | struct htc_endpoint *ep) | |
650 | { | |
651 | int rem_cred, cred_pad; | |
652 | ||
653 | rem_cred = *len % cred_sz; | |
654 | ||
655 | /* No padding needed */ | |
656 | if (!rem_cred) | |
657 | return 0; | |
658 | ||
659 | if (!(ep->conn_flags & HTC_FLGS_TX_BNDL_PAD_EN)) | |
660 | return -1; | |
661 | ||
662 | /* | |
663 | * The transfer consumes a "partial" credit, this | |
664 | * packet cannot be bundled unless we add | |
665 | * additional "dummy" padding (max 255 bytes) to | |
666 | * consume the entire credit. | |
667 | */ | |
668 | cred_pad = *len < cred_sz ? (cred_sz - *len) : rem_cred; | |
669 | ||
670 | if ((cred_pad > 0) && (cred_pad <= 255)) | |
671 | *len += cred_pad; | |
672 | else | |
673 | /* The amount of padding is too large, send as non-bundled */ | |
674 | return -1; | |
675 | ||
676 | return cred_pad; | |
677 | } | |
678 | ||
dfa0104c KV |
679 | static int ath6kl_htc_tx_setup_scat_list(struct htc_target *target, |
680 | struct htc_endpoint *endpoint, | |
681 | struct hif_scatter_req *scat_req, | |
682 | int n_scat, | |
683 | struct list_head *queue) | |
bdcd8170 KV |
684 | { |
685 | struct htc_packet *packet; | |
686 | int i, len, rem_scat, cred_pad; | |
687 | int status = 0; | |
05aab177 | 688 | u8 flags; |
bdcd8170 | 689 | |
3b2f5e51 | 690 | rem_scat = target->max_tx_bndl_sz; |
bdcd8170 KV |
691 | |
692 | for (i = 0; i < n_scat; i++) { | |
693 | scat_req->scat_list[i].packet = NULL; | |
694 | ||
695 | if (list_empty(queue)) | |
696 | break; | |
697 | ||
698 | packet = list_first_entry(queue, struct htc_packet, list); | |
5be8824f | 699 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
700 | packet->act_len + HTC_HDR_LENGTH); |
701 | ||
702 | cred_pad = htc_get_credit_padding(target->tgt_cred_sz, | |
703 | &len, endpoint); | |
f7a7e7ae | 704 | if (cred_pad < 0 || rem_scat < len) { |
bdcd8170 KV |
705 | status = -ENOSPC; |
706 | break; | |
707 | } | |
708 | ||
709 | rem_scat -= len; | |
710 | /* now remove it from the queue */ | |
bdcd8170 KV |
711 | list_del(&packet->list); |
712 | ||
713 | scat_req->scat_list[i].packet = packet; | |
714 | /* prepare packet and flag message as part of a send bundle */ | |
05aab177 KV |
715 | flags = packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE; |
716 | ath6kl_htc_tx_prep_pkt(packet, flags, | |
96f1fadc | 717 | cred_pad, packet->info.tx.seqno); |
94e532d1 | 718 | /* Make sure the buffer is 4-byte aligned */ |
dfa0104c KV |
719 | ath6kl_htc_tx_buf_align(&packet->buf, |
720 | packet->act_len + HTC_HDR_LENGTH); | |
bdcd8170 KV |
721 | scat_req->scat_list[i].buf = packet->buf; |
722 | scat_req->scat_list[i].len = len; | |
723 | ||
724 | scat_req->len += len; | |
725 | scat_req->scat_entries++; | |
ebf29c95 | 726 | ath6kl_dbg(ATH6KL_DBG_HTC, |
2387f0dc KV |
727 | "htc tx adding (%d) pkt 0x%p seqno %d len %d remaining %d\n", |
728 | i, packet, packet->info.tx.seqno, len, rem_scat); | |
bdcd8170 KV |
729 | } |
730 | ||
731 | /* Roll back scatter setup in case of any failure */ | |
f7a7e7ae | 732 | if (scat_req->scat_entries < HTC_MIN_HTC_MSGS_TO_BUNDLE) { |
bdcd8170 KV |
733 | for (i = scat_req->scat_entries - 1; i >= 0; i--) { |
734 | packet = scat_req->scat_list[i].packet; | |
735 | if (packet) { | |
736 | packet->buf += HTC_HDR_LENGTH; | |
737 | list_add(&packet->list, queue); | |
738 | } | |
739 | } | |
f7a7e7ae | 740 | return -EAGAIN; |
bdcd8170 KV |
741 | } |
742 | ||
f7a7e7ae | 743 | return status; |
bdcd8170 KV |
744 | } |
745 | ||
746 | /* | |
dfa0104c KV |
747 | * Drain a queue and send as bundles this function may return without fully |
748 | * draining the queue when | |
bdcd8170 KV |
749 | * |
750 | * 1. scatter resources are exhausted | |
751 | * 2. a message that will consume a partial credit will stop the | |
752 | * bundling process early | |
753 | * 3. we drop below the minimum number of messages for a bundle | |
754 | */ | |
dfa0104c KV |
755 | static void ath6kl_htc_tx_bundle(struct htc_endpoint *endpoint, |
756 | struct list_head *queue, | |
757 | int *sent_bundle, int *n_bundle_pkts) | |
bdcd8170 KV |
758 | { |
759 | struct htc_target *target = endpoint->target; | |
760 | struct hif_scatter_req *scat_req = NULL; | |
4771979a KV |
761 | int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0, i; |
762 | struct htc_packet *packet; | |
f7a7e7ae | 763 | int status; |
b29072cc CN |
764 | u32 txb_mask; |
765 | u8 ac = WMM_NUM_AC; | |
766 | ||
3acabc88 | 767 | if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && |
96f1fadc | 768 | (WMI_CONTROL_SVC != endpoint->svc_id)) |
b29072cc | 769 | ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
bdcd8170 | 770 | |
bdcd8170 | 771 | while (true) { |
f7a7e7ae | 772 | status = 0; |
bdcd8170 KV |
773 | n_scat = get_queue_depth(queue); |
774 | n_scat = min(n_scat, target->msg_per_bndl_max); | |
775 | ||
776 | if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE) | |
777 | /* not enough to bundle */ | |
778 | break; | |
779 | ||
780 | scat_req = hif_scatter_req_get(target->dev->ar); | |
781 | ||
782 | if (!scat_req) { | |
783 | /* no scatter resources */ | |
ebf29c95 | 784 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 785 | "htc tx no more scatter resources\n"); |
bdcd8170 KV |
786 | break; |
787 | } | |
788 | ||
b29072cc CN |
789 | if ((ac < WMM_NUM_AC) && (ac != WMM_AC_BK)) { |
790 | if (WMM_AC_BE == ac) | |
791 | /* | |
792 | * BE, BK have priorities and bit | |
793 | * positions reversed | |
794 | */ | |
795 | txb_mask = (1 << WMM_AC_BK); | |
796 | else | |
797 | /* | |
798 | * any AC with priority lower than | |
799 | * itself | |
800 | */ | |
801 | txb_mask = ((1 << ac) - 1); | |
b86aeb50 DC |
802 | |
803 | /* | |
804 | * when the scatter request resources drop below a | |
805 | * certain threshold, disable Tx bundling for all | |
806 | * AC's with priority lower than the current requesting | |
807 | * AC. Otherwise re-enable Tx bundling for them | |
808 | */ | |
809 | if (scat_req->scat_q_depth < ATH6KL_SCATTER_REQS) | |
810 | target->tx_bndl_mask &= ~txb_mask; | |
811 | else | |
812 | target->tx_bndl_mask |= txb_mask; | |
b29072cc CN |
813 | } |
814 | ||
471e92fd | 815 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx pkts to scatter: %d\n", |
bdcd8170 KV |
816 | n_scat); |
817 | ||
818 | scat_req->len = 0; | |
819 | scat_req->scat_entries = 0; | |
820 | ||
dfa0104c KV |
821 | status = ath6kl_htc_tx_setup_scat_list(target, endpoint, |
822 | scat_req, n_scat, | |
823 | queue); | |
f7a7e7ae | 824 | if (status == -EAGAIN) { |
bdcd8170 KV |
825 | hif_scatter_req_add(target->dev->ar, scat_req); |
826 | break; | |
827 | } | |
828 | ||
829 | /* send path is always asynchronous */ | |
830 | scat_req->complete = htc_async_tx_scat_complete; | |
bdcd8170 KV |
831 | n_sent_bundle++; |
832 | tot_pkts_bundle += scat_req->scat_entries; | |
833 | ||
ebf29c95 | 834 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 835 | "htc tx scatter bytes %d entries %d\n", |
bdcd8170 | 836 | scat_req->len, scat_req->scat_entries); |
4771979a KV |
837 | |
838 | for (i = 0; i < scat_req->scat_entries; i++) { | |
839 | packet = scat_req->scat_list[i].packet; | |
840 | trace_ath6kl_htc_tx(packet->status, packet->endpoint, | |
841 | packet->buf, packet->act_len); | |
842 | } | |
843 | ||
8e8ddb2b | 844 | ath6kl_hif_submit_scat_req(target->dev, scat_req, false); |
f7a7e7ae VT |
845 | |
846 | if (status) | |
847 | break; | |
bdcd8170 KV |
848 | } |
849 | ||
850 | *sent_bundle = n_sent_bundle; | |
851 | *n_bundle_pkts = tot_pkts_bundle; | |
471e92fd KV |
852 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx bundle sent %d pkts\n", |
853 | n_sent_bundle); | |
bdcd8170 KV |
854 | |
855 | return; | |
856 | } | |
857 | ||
dfa0104c KV |
858 | static void ath6kl_htc_tx_from_queue(struct htc_target *target, |
859 | struct htc_endpoint *endpoint) | |
bdcd8170 KV |
860 | { |
861 | struct list_head txq; | |
862 | struct htc_packet *packet; | |
863 | int bundle_sent; | |
864 | int n_pkts_bundle; | |
b29072cc | 865 | u8 ac = WMM_NUM_AC; |
93b42cae | 866 | int status; |
bdcd8170 KV |
867 | |
868 | spin_lock_bh(&target->tx_lock); | |
869 | ||
870 | endpoint->tx_proc_cnt++; | |
871 | if (endpoint->tx_proc_cnt > 1) { | |
872 | endpoint->tx_proc_cnt--; | |
873 | spin_unlock_bh(&target->tx_lock); | |
471e92fd | 874 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx busy\n"); |
bdcd8170 KV |
875 | return; |
876 | } | |
877 | ||
878 | /* | |
879 | * drain the endpoint TX queue for transmission as long | |
880 | * as we have enough credits. | |
881 | */ | |
882 | INIT_LIST_HEAD(&txq); | |
883 | ||
3acabc88 | 884 | if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && |
96f1fadc | 885 | (WMI_CONTROL_SVC != endpoint->svc_id)) |
b29072cc CN |
886 | ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
887 | ||
bdcd8170 | 888 | while (true) { |
bdcd8170 KV |
889 | if (list_empty(&endpoint->txq)) |
890 | break; | |
891 | ||
dfa0104c | 892 | ath6kl_htc_tx_pkts_get(target, endpoint, &txq); |
bdcd8170 KV |
893 | |
894 | if (list_empty(&txq)) | |
895 | break; | |
896 | ||
897 | spin_unlock_bh(&target->tx_lock); | |
898 | ||
899 | bundle_sent = 0; | |
900 | n_pkts_bundle = 0; | |
901 | ||
902 | while (true) { | |
903 | /* try to send a bundle on each pass */ | |
b29072cc | 904 | if ((target->tx_bndl_mask) && |
bdcd8170 KV |
905 | (get_queue_depth(&txq) >= |
906 | HTC_MIN_HTC_MSGS_TO_BUNDLE)) { | |
907 | int temp1 = 0, temp2 = 0; | |
908 | ||
b29072cc CN |
909 | /* check if bundling is enabled for an AC */ |
910 | if (target->tx_bndl_mask & (1 << ac)) { | |
911 | ath6kl_htc_tx_bundle(endpoint, &txq, | |
912 | &temp1, &temp2); | |
913 | bundle_sent += temp1; | |
914 | n_pkts_bundle += temp2; | |
915 | } | |
bdcd8170 KV |
916 | } |
917 | ||
918 | if (list_empty(&txq)) | |
919 | break; | |
920 | ||
921 | packet = list_first_entry(&txq, struct htc_packet, | |
922 | list); | |
923 | list_del(&packet->list); | |
924 | ||
dfa0104c KV |
925 | ath6kl_htc_tx_prep_pkt(packet, packet->info.tx.flags, |
926 | 0, packet->info.tx.seqno); | |
93b42cae VT |
927 | status = ath6kl_htc_tx_issue(target, packet); |
928 | ||
929 | if (status) { | |
930 | packet->status = status; | |
931 | packet->completion(packet->context, packet); | |
932 | } | |
bdcd8170 KV |
933 | } |
934 | ||
935 | spin_lock_bh(&target->tx_lock); | |
936 | ||
937 | endpoint->ep_st.tx_bundles += bundle_sent; | |
938 | endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle; | |
b29072cc CN |
939 | |
940 | /* | |
941 | * if an AC has bundling disabled and no tx bundling | |
942 | * has occured continously for a certain number of TX, | |
943 | * enable tx bundling for this AC | |
944 | */ | |
945 | if (!bundle_sent) { | |
946 | if (!(target->tx_bndl_mask & (1 << ac)) && | |
96f1fadc | 947 | (ac < WMM_NUM_AC)) { |
b29072cc CN |
948 | if (++target->ac_tx_count[ac] >= |
949 | TX_RESUME_BUNDLE_THRESHOLD) { | |
950 | target->ac_tx_count[ac] = 0; | |
951 | target->tx_bndl_mask |= (1 << ac); | |
952 | } | |
953 | } | |
954 | } else { | |
955 | /* tx bundling will reset the counter */ | |
956 | if (ac < WMM_NUM_AC) | |
957 | target->ac_tx_count[ac] = 0; | |
958 | } | |
bdcd8170 KV |
959 | } |
960 | ||
961 | endpoint->tx_proc_cnt = 0; | |
962 | spin_unlock_bh(&target->tx_lock); | |
963 | } | |
964 | ||
dfa0104c KV |
965 | static bool ath6kl_htc_tx_try(struct htc_target *target, |
966 | struct htc_endpoint *endpoint, | |
967 | struct htc_packet *tx_pkt) | |
bdcd8170 KV |
968 | { |
969 | struct htc_ep_callbacks ep_cb; | |
970 | int txq_depth; | |
971 | bool overflow = false; | |
972 | ||
973 | ep_cb = endpoint->ep_cb; | |
974 | ||
975 | spin_lock_bh(&target->tx_lock); | |
976 | txq_depth = get_queue_depth(&endpoint->txq); | |
977 | spin_unlock_bh(&target->tx_lock); | |
978 | ||
979 | if (txq_depth >= endpoint->max_txq_depth) | |
980 | overflow = true; | |
981 | ||
982 | if (overflow) | |
ebf29c95 | 983 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd KV |
984 | "htc tx overflow ep %d depth %d max %d\n", |
985 | endpoint->eid, txq_depth, | |
bdcd8170 KV |
986 | endpoint->max_txq_depth); |
987 | ||
988 | if (overflow && ep_cb.tx_full) { | |
bdcd8170 KV |
989 | if (ep_cb.tx_full(endpoint->target, tx_pkt) == |
990 | HTC_SEND_FULL_DROP) { | |
991 | endpoint->ep_st.tx_dropped += 1; | |
992 | return false; | |
993 | } | |
994 | } | |
995 | ||
996 | spin_lock_bh(&target->tx_lock); | |
997 | list_add_tail(&tx_pkt->list, &endpoint->txq); | |
998 | spin_unlock_bh(&target->tx_lock); | |
999 | ||
dfa0104c | 1000 | ath6kl_htc_tx_from_queue(target, endpoint); |
bdcd8170 KV |
1001 | |
1002 | return true; | |
1003 | } | |
1004 | ||
1005 | static void htc_chk_ep_txq(struct htc_target *target) | |
1006 | { | |
1007 | struct htc_endpoint *endpoint; | |
1008 | struct htc_endpoint_credit_dist *cred_dist; | |
1009 | ||
1010 | /* | |
1011 | * Run through the credit distribution list to see if there are | |
1012 | * packets queued. NOTE: no locks need to be taken since the | |
1013 | * distribution list is not dynamic (cannot be re-ordered) and we | |
1014 | * are not modifying any state. | |
1015 | */ | |
1016 | list_for_each_entry(cred_dist, &target->cred_dist_list, list) { | |
e8c39790 | 1017 | endpoint = cred_dist->htc_ep; |
bdcd8170 KV |
1018 | |
1019 | spin_lock_bh(&target->tx_lock); | |
1020 | if (!list_empty(&endpoint->txq)) { | |
ebf29c95 | 1021 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1022 | "htc creds ep %d credits %d pkts %d\n", |
bdcd8170 KV |
1023 | cred_dist->endpoint, |
1024 | endpoint->cred_dist.credits, | |
1025 | get_queue_depth(&endpoint->txq)); | |
1026 | spin_unlock_bh(&target->tx_lock); | |
1027 | /* | |
1028 | * Try to start the stalled queue, this list is | |
1029 | * ordered by priority. If there are credits | |
1030 | * available the highest priority queue will get a | |
1031 | * chance to reclaim credits from lower priority | |
1032 | * ones. | |
1033 | */ | |
dfa0104c | 1034 | ath6kl_htc_tx_from_queue(target, endpoint); |
bdcd8170 KV |
1035 | spin_lock_bh(&target->tx_lock); |
1036 | } | |
1037 | spin_unlock_bh(&target->tx_lock); | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | static int htc_setup_tx_complete(struct htc_target *target) | |
1042 | { | |
1043 | struct htc_packet *send_pkt = NULL; | |
1044 | int status; | |
1045 | ||
1046 | send_pkt = htc_get_control_buf(target, true); | |
1047 | ||
1048 | if (!send_pkt) | |
1049 | return -ENOMEM; | |
1050 | ||
1051 | if (target->htc_tgt_ver >= HTC_VERSION_2P1) { | |
1052 | struct htc_setup_comp_ext_msg *setup_comp_ext; | |
1053 | u32 flags = 0; | |
1054 | ||
1055 | setup_comp_ext = | |
1056 | (struct htc_setup_comp_ext_msg *)send_pkt->buf; | |
1057 | memset(setup_comp_ext, 0, sizeof(*setup_comp_ext)); | |
1058 | setup_comp_ext->msg_id = | |
1059 | cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID); | |
1060 | ||
1061 | if (target->msg_per_bndl_max > 0) { | |
1062 | /* Indicate HTC bundling to the target */ | |
1063 | flags |= HTC_SETUP_COMP_FLG_RX_BNDL_EN; | |
1064 | setup_comp_ext->msg_per_rxbndl = | |
1065 | target->msg_per_bndl_max; | |
1066 | } | |
1067 | ||
1068 | memcpy(&setup_comp_ext->flags, &flags, | |
1069 | sizeof(setup_comp_ext->flags)); | |
1070 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp_ext, | |
96f1fadc KV |
1071 | sizeof(struct htc_setup_comp_ext_msg), |
1072 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
bdcd8170 KV |
1073 | |
1074 | } else { | |
1075 | struct htc_setup_comp_msg *setup_comp; | |
1076 | setup_comp = (struct htc_setup_comp_msg *)send_pkt->buf; | |
1077 | memset(setup_comp, 0, sizeof(struct htc_setup_comp_msg)); | |
1078 | setup_comp->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_ID); | |
1079 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp, | |
96f1fadc KV |
1080 | sizeof(struct htc_setup_comp_msg), |
1081 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
bdcd8170 KV |
1082 | } |
1083 | ||
1084 | /* we want synchronous operation */ | |
1085 | send_pkt->completion = NULL; | |
dfa0104c KV |
1086 | ath6kl_htc_tx_prep_pkt(send_pkt, 0, 0, 0); |
1087 | status = ath6kl_htc_tx_issue(target, send_pkt); | |
bdcd8170 KV |
1088 | |
1089 | if (send_pkt != NULL) | |
1090 | htc_reclaim_txctrl_buf(target, send_pkt); | |
1091 | ||
1092 | return status; | |
1093 | } | |
1094 | ||
e76ac2bf | 1095 | static void ath6kl_htc_set_credit_dist(struct htc_target *target, |
3c370398 | 1096 | struct ath6kl_htc_credit_info *credit_info, |
ad226ec2 | 1097 | u16 srvc_pri_order[], int list_len) |
bdcd8170 KV |
1098 | { |
1099 | struct htc_endpoint *endpoint; | |
1100 | int i, ep; | |
1101 | ||
3c370398 | 1102 | target->credit_info = credit_info; |
bdcd8170 KV |
1103 | |
1104 | list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list, | |
1105 | &target->cred_dist_list); | |
1106 | ||
1107 | for (i = 0; i < list_len; i++) { | |
1108 | for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { | |
1109 | endpoint = &target->endpoint[ep]; | |
1110 | if (endpoint->svc_id == srvc_pri_order[i]) { | |
1111 | list_add_tail(&endpoint->cred_dist.list, | |
1112 | &target->cred_dist_list); | |
1113 | break; | |
1114 | } | |
1115 | } | |
1116 | if (ep >= ENDPOINT_MAX) { | |
1117 | WARN_ON(1); | |
1118 | return; | |
1119 | } | |
1120 | } | |
1121 | } | |
1122 | ||
e76ac2bf KV |
1123 | static int ath6kl_htc_mbox_tx(struct htc_target *target, |
1124 | struct htc_packet *packet) | |
bdcd8170 KV |
1125 | { |
1126 | struct htc_endpoint *endpoint; | |
1127 | struct list_head queue; | |
1128 | ||
ebf29c95 | 1129 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1130 | "htc tx ep id %d buf 0x%p len %d\n", |
bdcd8170 KV |
1131 | packet->endpoint, packet->buf, packet->act_len); |
1132 | ||
1133 | if (packet->endpoint >= ENDPOINT_MAX) { | |
1134 | WARN_ON(1); | |
1135 | return -EINVAL; | |
1136 | } | |
1137 | ||
1138 | endpoint = &target->endpoint[packet->endpoint]; | |
1139 | ||
dfa0104c | 1140 | if (!ath6kl_htc_tx_try(target, endpoint, packet)) { |
bdcd8170 KV |
1141 | packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ? |
1142 | -ECANCELED : -ENOSPC; | |
1143 | INIT_LIST_HEAD(&queue); | |
1144 | list_add(&packet->list, &queue); | |
1145 | htc_tx_complete(endpoint, &queue); | |
1146 | } | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* flush endpoint TX queue */ | |
e76ac2bf | 1152 | static void ath6kl_htc_mbox_flush_txep(struct htc_target *target, |
ad226ec2 | 1153 | enum htc_endpoint_id eid, u16 tag) |
bdcd8170 KV |
1154 | { |
1155 | struct htc_packet *packet, *tmp_pkt; | |
1156 | struct list_head discard_q, container; | |
1157 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
1158 | ||
1159 | if (!endpoint->svc_id) { | |
1160 | WARN_ON(1); | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | /* initialize the discard queue */ | |
1165 | INIT_LIST_HEAD(&discard_q); | |
1166 | ||
1167 | spin_lock_bh(&target->tx_lock); | |
1168 | ||
1169 | list_for_each_entry_safe(packet, tmp_pkt, &endpoint->txq, list) { | |
1170 | if ((tag == HTC_TX_PACKET_TAG_ALL) || | |
1171 | (tag == packet->info.tx.tag)) | |
1172 | list_move_tail(&packet->list, &discard_q); | |
1173 | } | |
1174 | ||
1175 | spin_unlock_bh(&target->tx_lock); | |
1176 | ||
1177 | list_for_each_entry_safe(packet, tmp_pkt, &discard_q, list) { | |
1178 | packet->status = -ECANCELED; | |
1179 | list_del(&packet->list); | |
ebf29c95 | 1180 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
1181 | "htc tx flushing pkt 0x%p len %d ep %d tag 0x%x\n", |
1182 | packet, packet->act_len, | |
1183 | packet->endpoint, packet->info.tx.tag); | |
bdcd8170 KV |
1184 | |
1185 | INIT_LIST_HEAD(&container); | |
1186 | list_add_tail(&packet->list, &container); | |
1187 | htc_tx_complete(endpoint, &container); | |
1188 | } | |
bdcd8170 KV |
1189 | } |
1190 | ||
ad226ec2 | 1191 | static void ath6kl_htc_flush_txep_all(struct htc_target *target) |
bdcd8170 KV |
1192 | { |
1193 | struct htc_endpoint *endpoint; | |
1194 | int i; | |
1195 | ||
1196 | dump_cred_dist_stats(target); | |
1197 | ||
1198 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
1199 | endpoint = &target->endpoint[i]; | |
1200 | if (endpoint->svc_id == 0) | |
1201 | /* not in use.. */ | |
1202 | continue; | |
e76ac2bf | 1203 | ath6kl_htc_mbox_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL); |
bdcd8170 KV |
1204 | } |
1205 | } | |
1206 | ||
e76ac2bf KV |
1207 | static void ath6kl_htc_mbox_activity_changed(struct htc_target *target, |
1208 | enum htc_endpoint_id eid, | |
1209 | bool active) | |
bdcd8170 KV |
1210 | { |
1211 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
1212 | bool dist = false; | |
1213 | ||
1214 | if (endpoint->svc_id == 0) { | |
1215 | WARN_ON(1); | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | spin_lock_bh(&target->tx_lock); | |
1220 | ||
1221 | if (active) { | |
1222 | if (!(endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE)) { | |
1223 | endpoint->cred_dist.dist_flags |= HTC_EP_ACTIVE; | |
1224 | dist = true; | |
1225 | } | |
1226 | } else { | |
1227 | if (endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE) { | |
1228 | endpoint->cred_dist.dist_flags &= ~HTC_EP_ACTIVE; | |
1229 | dist = true; | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | if (dist) { | |
1234 | endpoint->cred_dist.txq_depth = | |
1235 | get_queue_depth(&endpoint->txq); | |
1236 | ||
471e92fd KV |
1237 | ath6kl_dbg(ATH6KL_DBG_HTC, |
1238 | "htc tx activity ctxt 0x%p dist 0x%p\n", | |
3c370398 | 1239 | target->credit_info, &target->cred_dist_list); |
bdcd8170 | 1240 | |
3c370398 | 1241 | ath6kl_credit_distribute(target->credit_info, |
fa99e963 KV |
1242 | &target->cred_dist_list, |
1243 | HTC_CREDIT_DIST_ACTIVITY_CHANGE); | |
bdcd8170 KV |
1244 | } |
1245 | ||
1246 | spin_unlock_bh(&target->tx_lock); | |
1247 | ||
1248 | if (dist && !active) | |
1249 | htc_chk_ep_txq(target); | |
1250 | } | |
1251 | ||
1252 | /* HTC Rx */ | |
1253 | ||
689def90 KV |
1254 | static inline void ath6kl_htc_rx_update_stats(struct htc_endpoint *endpoint, |
1255 | int n_look_ahds) | |
bdcd8170 KV |
1256 | { |
1257 | endpoint->ep_st.rx_pkts++; | |
1258 | if (n_look_ahds == 1) | |
1259 | endpoint->ep_st.rx_lkahds++; | |
1260 | else if (n_look_ahds > 1) | |
1261 | endpoint->ep_st.rx_bundle_lkahd++; | |
1262 | } | |
1263 | ||
1264 | static inline bool htc_valid_rx_frame_len(struct htc_target *target, | |
1265 | enum htc_endpoint_id eid, int len) | |
1266 | { | |
1267 | return (eid == target->dev->ar->ctrl_ep) ? | |
1268 | len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE; | |
1269 | } | |
1270 | ||
1271 | static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet) | |
1272 | { | |
1273 | struct list_head queue; | |
1274 | ||
1275 | INIT_LIST_HEAD(&queue); | |
1276 | list_add_tail(&packet->list, &queue); | |
e76ac2bf | 1277 | return ath6kl_htc_mbox_add_rxbuf_multiple(target, &queue); |
bdcd8170 KV |
1278 | } |
1279 | ||
1280 | static void htc_reclaim_rxbuf(struct htc_target *target, | |
1281 | struct htc_packet *packet, | |
1282 | struct htc_endpoint *ep) | |
1283 | { | |
1284 | if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) { | |
1285 | htc_rxpkt_reset(packet); | |
1286 | packet->status = -ECANCELED; | |
1287 | ep->ep_cb.rx(ep->target, packet); | |
1288 | } else { | |
1289 | htc_rxpkt_reset(packet); | |
1290 | htc_add_rxbuf((void *)(target), packet); | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | static void reclaim_rx_ctrl_buf(struct htc_target *target, | |
1295 | struct htc_packet *packet) | |
1296 | { | |
1297 | spin_lock_bh(&target->htc_lock); | |
1298 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
1299 | spin_unlock_bh(&target->htc_lock); | |
1300 | } | |
1301 | ||
689def90 KV |
1302 | static int ath6kl_htc_rx_packet(struct htc_target *target, |
1303 | struct htc_packet *packet, | |
1304 | u32 rx_len) | |
bdcd8170 KV |
1305 | { |
1306 | struct ath6kl_device *dev = target->dev; | |
1307 | u32 padded_len; | |
1308 | int status; | |
1309 | ||
5be8824f | 1310 | padded_len = CALC_TXRX_PADDED_LEN(target, rx_len); |
bdcd8170 KV |
1311 | |
1312 | if (padded_len > packet->buf_len) { | |
471e92fd | 1313 | ath6kl_err("not enough receive space for packet - padlen %d recvlen %d bufferlen %d\n", |
bdcd8170 KV |
1314 | padded_len, rx_len, packet->buf_len); |
1315 | return -ENOMEM; | |
1316 | } | |
1317 | ||
ebf29c95 | 1318 | ath6kl_dbg(ATH6KL_DBG_HTC, |
df6a7072 | 1319 | "htc rx 0x%p hdr 0x%x len %d mbox 0x%x\n", |
bdcd8170 | 1320 | packet, packet->info.rx.exp_hdr, |
471e92fd | 1321 | padded_len, dev->ar->mbox_info.htc_addr); |
bdcd8170 KV |
1322 | |
1323 | status = hif_read_write_sync(dev->ar, | |
1324 | dev->ar->mbox_info.htc_addr, | |
1325 | packet->buf, padded_len, | |
1326 | HIF_RD_SYNC_BLOCK_FIX); | |
1327 | ||
1328 | packet->status = status; | |
1329 | ||
1330 | return status; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * optimization for recv packets, we can indicate a | |
1335 | * "hint" that there are more single-packets to fetch | |
1336 | * on this endpoint. | |
1337 | */ | |
689def90 KV |
1338 | static void ath6kl_htc_rx_set_indicate(u32 lk_ahd, |
1339 | struct htc_endpoint *endpoint, | |
1340 | struct htc_packet *packet) | |
bdcd8170 KV |
1341 | { |
1342 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)&lk_ahd; | |
1343 | ||
1344 | if (htc_hdr->eid == packet->endpoint) { | |
1345 | if (!list_empty(&endpoint->rx_bufq)) | |
1346 | packet->info.rx.indicat_flags |= | |
1347 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
1348 | } | |
1349 | } | |
1350 | ||
689def90 | 1351 | static void ath6kl_htc_rx_chk_water_mark(struct htc_endpoint *endpoint) |
bdcd8170 KV |
1352 | { |
1353 | struct htc_ep_callbacks ep_cb = endpoint->ep_cb; | |
1354 | ||
1355 | if (ep_cb.rx_refill_thresh > 0) { | |
1356 | spin_lock_bh(&endpoint->target->rx_lock); | |
1357 | if (get_queue_depth(&endpoint->rx_bufq) | |
1358 | < ep_cb.rx_refill_thresh) { | |
1359 | spin_unlock_bh(&endpoint->target->rx_lock); | |
1360 | ep_cb.rx_refill(endpoint->target, endpoint->eid); | |
1361 | return; | |
1362 | } | |
1363 | spin_unlock_bh(&endpoint->target->rx_lock); | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | /* This function is called with rx_lock held */ | |
689def90 KV |
1368 | static int ath6kl_htc_rx_setup(struct htc_target *target, |
1369 | struct htc_endpoint *ep, | |
1370 | u32 *lk_ahds, struct list_head *queue, int n_msg) | |
bdcd8170 KV |
1371 | { |
1372 | struct htc_packet *packet; | |
1373 | /* FIXME: type of lk_ahds can't be right */ | |
1374 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)lk_ahds; | |
1375 | struct htc_ep_callbacks ep_cb; | |
1376 | int status = 0, j, full_len; | |
1377 | bool no_recycle; | |
1378 | ||
5be8824f | 1379 | full_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
1380 | le16_to_cpu(htc_hdr->payld_len) + |
1381 | sizeof(*htc_hdr)); | |
1382 | ||
1383 | if (!htc_valid_rx_frame_len(target, ep->eid, full_len)) { | |
5c980fbb VT |
1384 | ath6kl_warn("Rx buffer requested with invalid length htc_hdr:eid %d, flags 0x%x, len %d\n", |
1385 | htc_hdr->eid, htc_hdr->flags, | |
1386 | le16_to_cpu(htc_hdr->payld_len)); | |
bdcd8170 KV |
1387 | return -EINVAL; |
1388 | } | |
1389 | ||
1390 | ep_cb = ep->ep_cb; | |
1391 | for (j = 0; j < n_msg; j++) { | |
bdcd8170 KV |
1392 | /* |
1393 | * Reset flag, any packets allocated using the | |
1394 | * rx_alloc() API cannot be recycled on | |
1395 | * cleanup,they must be explicitly returned. | |
1396 | */ | |
1397 | no_recycle = false; | |
1398 | ||
1399 | if (ep_cb.rx_allocthresh && | |
1400 | (full_len > ep_cb.rx_alloc_thresh)) { | |
1401 | ep->ep_st.rx_alloc_thresh_hit += 1; | |
1402 | ep->ep_st.rxalloc_thresh_byte += | |
1403 | le16_to_cpu(htc_hdr->payld_len); | |
1404 | ||
1405 | spin_unlock_bh(&target->rx_lock); | |
1406 | no_recycle = true; | |
1407 | ||
1408 | packet = ep_cb.rx_allocthresh(ep->target, ep->eid, | |
1409 | full_len); | |
1410 | spin_lock_bh(&target->rx_lock); | |
1411 | } else { | |
1412 | /* refill handler is being used */ | |
1413 | if (list_empty(&ep->rx_bufq)) { | |
1414 | if (ep_cb.rx_refill) { | |
1415 | spin_unlock_bh(&target->rx_lock); | |
1416 | ep_cb.rx_refill(ep->target, ep->eid); | |
1417 | spin_lock_bh(&target->rx_lock); | |
1418 | } | |
1419 | } | |
1420 | ||
a5d8f9df | 1421 | if (list_empty(&ep->rx_bufq)) { |
bdcd8170 | 1422 | packet = NULL; |
a5d8f9df | 1423 | } else { |
bdcd8170 KV |
1424 | packet = list_first_entry(&ep->rx_bufq, |
1425 | struct htc_packet, list); | |
1426 | list_del(&packet->list); | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | if (!packet) { | |
1431 | target->rx_st_flags |= HTC_RECV_WAIT_BUFFERS; | |
1432 | target->ep_waiting = ep->eid; | |
1433 | return -ENOSPC; | |
1434 | } | |
1435 | ||
1436 | /* clear flags */ | |
1437 | packet->info.rx.rx_flags = 0; | |
1438 | packet->info.rx.indicat_flags = 0; | |
1439 | packet->status = 0; | |
1440 | ||
1441 | if (no_recycle) | |
1442 | /* | |
1443 | * flag that these packets cannot be | |
1444 | * recycled, they have to be returned to | |
1445 | * the user | |
1446 | */ | |
1447 | packet->info.rx.rx_flags |= HTC_RX_PKT_NO_RECYCLE; | |
1448 | ||
1449 | /* Caller needs to free this upon any failure */ | |
1450 | list_add_tail(&packet->list, queue); | |
1451 | ||
1452 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
1453 | status = -ECANCELED; | |
1454 | break; | |
1455 | } | |
1456 | ||
1457 | if (j) { | |
1458 | packet->info.rx.rx_flags |= HTC_RX_PKT_REFRESH_HDR; | |
1459 | packet->info.rx.exp_hdr = 0xFFFFFFFF; | |
1460 | } else | |
1461 | /* set expected look ahead */ | |
1462 | packet->info.rx.exp_hdr = *lk_ahds; | |
1463 | ||
1464 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + | |
1465 | HTC_HDR_LENGTH; | |
1466 | } | |
1467 | ||
1468 | return status; | |
1469 | } | |
1470 | ||
689def90 KV |
1471 | static int ath6kl_htc_rx_alloc(struct htc_target *target, |
1472 | u32 lk_ahds[], int msg, | |
1473 | struct htc_endpoint *endpoint, | |
1474 | struct list_head *queue) | |
bdcd8170 KV |
1475 | { |
1476 | int status = 0; | |
1477 | struct htc_packet *packet, *tmp_pkt; | |
1478 | struct htc_frame_hdr *htc_hdr; | |
1479 | int i, n_msg; | |
1480 | ||
1481 | spin_lock_bh(&target->rx_lock); | |
1482 | ||
1483 | for (i = 0; i < msg; i++) { | |
bdcd8170 KV |
1484 | htc_hdr = (struct htc_frame_hdr *)&lk_ahds[i]; |
1485 | ||
1486 | if (htc_hdr->eid >= ENDPOINT_MAX) { | |
1487 | ath6kl_err("invalid ep in look-ahead: %d\n", | |
1488 | htc_hdr->eid); | |
1489 | status = -ENOMEM; | |
1490 | break; | |
1491 | } | |
1492 | ||
1493 | if (htc_hdr->eid != endpoint->eid) { | |
1494 | ath6kl_err("invalid ep in look-ahead: %d should be : %d (index:%d)\n", | |
1495 | htc_hdr->eid, endpoint->eid, i); | |
1496 | status = -ENOMEM; | |
1497 | break; | |
1498 | } | |
1499 | ||
1500 | if (le16_to_cpu(htc_hdr->payld_len) > HTC_MAX_PAYLOAD_LENGTH) { | |
1501 | ath6kl_err("payload len %d exceeds max htc : %d !\n", | |
1502 | htc_hdr->payld_len, | |
1503 | (u32) HTC_MAX_PAYLOAD_LENGTH); | |
1504 | status = -ENOMEM; | |
1505 | break; | |
1506 | } | |
1507 | ||
1508 | if (endpoint->svc_id == 0) { | |
1509 | ath6kl_err("ep %d is not connected !\n", htc_hdr->eid); | |
1510 | status = -ENOMEM; | |
1511 | break; | |
1512 | } | |
1513 | ||
1514 | if (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) { | |
1515 | /* | |
1516 | * HTC header indicates that every packet to follow | |
1517 | * has the same padded length so that it can be | |
1518 | * optimally fetched as a full bundle. | |
1519 | */ | |
1520 | n_msg = (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) >> | |
1521 | HTC_FLG_RX_BNDL_CNT_S; | |
1522 | ||
1523 | /* the count doesn't include the starter frame */ | |
1524 | n_msg++; | |
1525 | if (n_msg > target->msg_per_bndl_max) { | |
1526 | status = -ENOMEM; | |
1527 | break; | |
1528 | } | |
1529 | ||
1530 | endpoint->ep_st.rx_bundle_from_hdr += 1; | |
ebf29c95 | 1531 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1532 | "htc rx bundle pkts %d\n", |
bdcd8170 KV |
1533 | n_msg); |
1534 | } else | |
1535 | /* HTC header only indicates 1 message to fetch */ | |
1536 | n_msg = 1; | |
1537 | ||
1538 | /* Setup packet buffers for each message */ | |
689def90 KV |
1539 | status = ath6kl_htc_rx_setup(target, endpoint, &lk_ahds[i], |
1540 | queue, n_msg); | |
bdcd8170 KV |
1541 | |
1542 | /* | |
1543 | * This is due to unavailabilty of buffers to rx entire data. | |
1544 | * Return no error so that free buffers from queue can be used | |
1545 | * to receive partial data. | |
1546 | */ | |
1547 | if (status == -ENOSPC) { | |
1548 | spin_unlock_bh(&target->rx_lock); | |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | if (status) | |
1553 | break; | |
1554 | } | |
1555 | ||
1556 | spin_unlock_bh(&target->rx_lock); | |
1557 | ||
1558 | if (status) { | |
1559 | list_for_each_entry_safe(packet, tmp_pkt, queue, list) { | |
1560 | list_del(&packet->list); | |
1561 | htc_reclaim_rxbuf(target, packet, | |
1562 | &target->endpoint[packet->endpoint]); | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | return status; | |
1567 | } | |
1568 | ||
1569 | static void htc_ctrl_rx(struct htc_target *context, struct htc_packet *packets) | |
1570 | { | |
1571 | if (packets->endpoint != ENDPOINT_0) { | |
1572 | WARN_ON(1); | |
1573 | return; | |
1574 | } | |
1575 | ||
1576 | if (packets->status == -ECANCELED) { | |
1577 | reclaim_rx_ctrl_buf(context, packets); | |
1578 | return; | |
1579 | } | |
1580 | ||
1581 | if (packets->act_len > 0) { | |
1582 | ath6kl_err("htc_ctrl_rx, got message with len:%zu\n", | |
96f1fadc | 1583 | packets->act_len + HTC_HDR_LENGTH); |
bdcd8170 | 1584 | |
471e92fd KV |
1585 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, |
1586 | "htc rx unexpected endpoint 0 message", "", | |
ef094103 KV |
1587 | packets->buf - HTC_HDR_LENGTH, |
1588 | packets->act_len + HTC_HDR_LENGTH); | |
bdcd8170 KV |
1589 | } |
1590 | ||
1591 | htc_reclaim_rxbuf(context, packets, &context->endpoint[0]); | |
1592 | } | |
1593 | ||
1594 | static void htc_proc_cred_rpt(struct htc_target *target, | |
1595 | struct htc_credit_report *rpt, | |
1596 | int n_entries, | |
1597 | enum htc_endpoint_id from_ep) | |
1598 | { | |
1599 | struct htc_endpoint *endpoint; | |
1600 | int tot_credits = 0, i; | |
1601 | bool dist = false; | |
1602 | ||
bdcd8170 KV |
1603 | spin_lock_bh(&target->tx_lock); |
1604 | ||
1605 | for (i = 0; i < n_entries; i++, rpt++) { | |
1606 | if (rpt->eid >= ENDPOINT_MAX) { | |
1607 | WARN_ON(1); | |
1608 | spin_unlock_bh(&target->tx_lock); | |
1609 | return; | |
1610 | } | |
1611 | ||
1612 | endpoint = &target->endpoint[rpt->eid]; | |
1613 | ||
02f0d6fc KV |
1614 | ath6kl_dbg(ATH6KL_DBG_CREDIT, |
1615 | "credit report ep %d credits %d\n", | |
471e92fd | 1616 | rpt->eid, rpt->credits); |
bdcd8170 KV |
1617 | |
1618 | endpoint->ep_st.tx_cred_rpt += 1; | |
1619 | endpoint->ep_st.cred_retnd += rpt->credits; | |
1620 | ||
1621 | if (from_ep == rpt->eid) { | |
1622 | /* | |
1623 | * This credit report arrived on the same endpoint | |
1624 | * indicating it arrived in an RX packet. | |
1625 | */ | |
1626 | endpoint->ep_st.cred_from_rx += rpt->credits; | |
1627 | endpoint->ep_st.cred_rpt_from_rx += 1; | |
1628 | } else if (from_ep == ENDPOINT_0) { | |
1629 | /* credit arrived on endpoint 0 as a NULL message */ | |
1630 | endpoint->ep_st.cred_from_ep0 += rpt->credits; | |
1631 | endpoint->ep_st.cred_rpt_ep0 += 1; | |
1632 | } else { | |
1633 | endpoint->ep_st.cred_from_other += rpt->credits; | |
1634 | endpoint->ep_st.cred_rpt_from_other += 1; | |
1635 | } | |
1636 | ||
5ba3ee48 | 1637 | if (rpt->eid == ENDPOINT_0) |
bdcd8170 KV |
1638 | /* always give endpoint 0 credits back */ |
1639 | endpoint->cred_dist.credits += rpt->credits; | |
1640 | else { | |
1641 | endpoint->cred_dist.cred_to_dist += rpt->credits; | |
1642 | dist = true; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * Refresh tx depth for distribution function that will | |
1647 | * recover these credits NOTE: this is only valid when | |
1648 | * there are credits to recover! | |
1649 | */ | |
1650 | endpoint->cred_dist.txq_depth = | |
1651 | get_queue_depth(&endpoint->txq); | |
1652 | ||
1653 | tot_credits += rpt->credits; | |
1654 | } | |
1655 | ||
bdcd8170 KV |
1656 | if (dist) { |
1657 | /* | |
1658 | * This was a credit return based on a completed send | |
1659 | * operations note, this is done with the lock held | |
1660 | */ | |
3c370398 | 1661 | ath6kl_credit_distribute(target->credit_info, |
fa99e963 KV |
1662 | &target->cred_dist_list, |
1663 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
bdcd8170 KV |
1664 | } |
1665 | ||
1666 | spin_unlock_bh(&target->tx_lock); | |
1667 | ||
1668 | if (tot_credits) | |
1669 | htc_chk_ep_txq(target); | |
1670 | } | |
1671 | ||
1672 | static int htc_parse_trailer(struct htc_target *target, | |
1673 | struct htc_record_hdr *record, | |
1674 | u8 *record_buf, u32 *next_lk_ahds, | |
1675 | enum htc_endpoint_id endpoint, | |
1676 | int *n_lk_ahds) | |
1677 | { | |
1678 | struct htc_bundle_lkahd_rpt *bundle_lkahd_rpt; | |
1679 | struct htc_lookahead_report *lk_ahd; | |
1680 | int len; | |
1681 | ||
1682 | switch (record->rec_id) { | |
1683 | case HTC_RECORD_CREDITS: | |
1684 | len = record->len / sizeof(struct htc_credit_report); | |
1685 | if (!len) { | |
1686 | WARN_ON(1); | |
1687 | return -EINVAL; | |
1688 | } | |
1689 | ||
1690 | htc_proc_cred_rpt(target, | |
1691 | (struct htc_credit_report *) record_buf, | |
1692 | len, endpoint); | |
1693 | break; | |
1694 | case HTC_RECORD_LOOKAHEAD: | |
1695 | len = record->len / sizeof(*lk_ahd); | |
1696 | if (!len) { | |
1697 | WARN_ON(1); | |
1698 | return -EINVAL; | |
1699 | } | |
1700 | ||
1701 | lk_ahd = (struct htc_lookahead_report *) record_buf; | |
ddc3d77c KV |
1702 | if ((lk_ahd->pre_valid == ((~lk_ahd->post_valid) & 0xFF)) && |
1703 | next_lk_ahds) { | |
ebf29c95 | 1704 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1705 | "htc rx lk_ahd found pre_valid 0x%x post_valid 0x%x\n", |
bdcd8170 KV |
1706 | lk_ahd->pre_valid, lk_ahd->post_valid); |
1707 | ||
1708 | /* look ahead bytes are valid, copy them over */ | |
1709 | memcpy((u8 *)&next_lk_ahds[0], lk_ahd->lk_ahd, 4); | |
1710 | ||
471e92fd KV |
1711 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, |
1712 | "htc rx next look ahead", | |
ef094103 | 1713 | "", next_lk_ahds, 4); |
bdcd8170 KV |
1714 | |
1715 | *n_lk_ahds = 1; | |
1716 | } | |
1717 | break; | |
1718 | case HTC_RECORD_LOOKAHEAD_BUNDLE: | |
1719 | len = record->len / sizeof(*bundle_lkahd_rpt); | |
1720 | if (!len || (len > HTC_HOST_MAX_MSG_PER_BUNDLE)) { | |
1721 | WARN_ON(1); | |
1722 | return -EINVAL; | |
1723 | } | |
1724 | ||
1725 | if (next_lk_ahds) { | |
1726 | int i; | |
1727 | ||
1728 | bundle_lkahd_rpt = | |
1729 | (struct htc_bundle_lkahd_rpt *) record_buf; | |
1730 | ||
471e92fd | 1731 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bundle lk_ahd", |
ef094103 | 1732 | "", record_buf, record->len); |
bdcd8170 KV |
1733 | |
1734 | for (i = 0; i < len; i++) { | |
1735 | memcpy((u8 *)&next_lk_ahds[i], | |
1736 | bundle_lkahd_rpt->lk_ahd, 4); | |
1737 | bundle_lkahd_rpt++; | |
1738 | } | |
1739 | ||
1740 | *n_lk_ahds = i; | |
1741 | } | |
1742 | break; | |
1743 | default: | |
1744 | ath6kl_err("unhandled record: id:%d len:%d\n", | |
1745 | record->rec_id, record->len); | |
1746 | break; | |
1747 | } | |
1748 | ||
1749 | return 0; | |
bdcd8170 KV |
1750 | } |
1751 | ||
1752 | static int htc_proc_trailer(struct htc_target *target, | |
1753 | u8 *buf, int len, u32 *next_lk_ahds, | |
1754 | int *n_lk_ahds, enum htc_endpoint_id endpoint) | |
1755 | { | |
1756 | struct htc_record_hdr *record; | |
1757 | int orig_len; | |
1758 | int status; | |
1759 | u8 *record_buf; | |
1760 | u8 *orig_buf; | |
1761 | ||
471e92fd KV |
1762 | ath6kl_dbg(ATH6KL_DBG_HTC, "htc rx trailer len %d\n", len); |
1763 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, NULL, "", buf, len); | |
bdcd8170 KV |
1764 | |
1765 | orig_buf = buf; | |
1766 | orig_len = len; | |
1767 | status = 0; | |
1768 | ||
1769 | while (len > 0) { | |
bdcd8170 KV |
1770 | if (len < sizeof(struct htc_record_hdr)) { |
1771 | status = -ENOMEM; | |
1772 | break; | |
1773 | } | |
1774 | /* these are byte aligned structs */ | |
1775 | record = (struct htc_record_hdr *) buf; | |
1776 | len -= sizeof(struct htc_record_hdr); | |
1777 | buf += sizeof(struct htc_record_hdr); | |
1778 | ||
1779 | if (record->len > len) { | |
1780 | ath6kl_err("invalid record len: %d (id:%d) buf has: %d bytes left\n", | |
1781 | record->len, record->rec_id, len); | |
1782 | status = -ENOMEM; | |
1783 | break; | |
1784 | } | |
1785 | record_buf = buf; | |
1786 | ||
1787 | status = htc_parse_trailer(target, record, record_buf, | |
1788 | next_lk_ahds, endpoint, n_lk_ahds); | |
1789 | ||
1790 | if (status) | |
1791 | break; | |
1792 | ||
1793 | /* advance buffer past this record for next time around */ | |
1794 | buf += record->len; | |
1795 | len -= record->len; | |
1796 | } | |
1797 | ||
2588f554 | 1798 | if (status) |
471e92fd | 1799 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad trailer", |
ef094103 | 1800 | "", orig_buf, orig_len); |
bdcd8170 KV |
1801 | |
1802 | return status; | |
1803 | } | |
1804 | ||
689def90 KV |
1805 | static int ath6kl_htc_rx_process_hdr(struct htc_target *target, |
1806 | struct htc_packet *packet, | |
1807 | u32 *next_lkahds, int *n_lkahds) | |
bdcd8170 KV |
1808 | { |
1809 | int status = 0; | |
1810 | u16 payload_len; | |
1811 | u32 lk_ahd; | |
1812 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)packet->buf; | |
1813 | ||
1814 | if (n_lkahds != NULL) | |
1815 | *n_lkahds = 0; | |
1816 | ||
bdcd8170 KV |
1817 | /* |
1818 | * NOTE: we cannot assume the alignment of buf, so we use the safe | |
1819 | * macros to retrieve 16 bit fields. | |
1820 | */ | |
1821 | payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len)); | |
1822 | ||
1823 | memcpy((u8 *)&lk_ahd, packet->buf, sizeof(lk_ahd)); | |
1824 | ||
1825 | if (packet->info.rx.rx_flags & HTC_RX_PKT_REFRESH_HDR) { | |
1826 | /* | |
1827 | * Refresh the expected header and the actual length as it | |
1828 | * was unknown when this packet was grabbed as part of the | |
1829 | * bundle. | |
1830 | */ | |
1831 | packet->info.rx.exp_hdr = lk_ahd; | |
1832 | packet->act_len = payload_len + HTC_HDR_LENGTH; | |
1833 | ||
1834 | /* validate the actual header that was refreshed */ | |
1835 | if (packet->act_len > packet->buf_len) { | |
1836 | ath6kl_err("refreshed hdr payload len (%d) in bundled recv is invalid (hdr: 0x%X)\n", | |
1837 | payload_len, lk_ahd); | |
1838 | /* | |
1839 | * Limit this to max buffer just to print out some | |
1840 | * of the buffer. | |
1841 | */ | |
1842 | packet->act_len = min(packet->act_len, packet->buf_len); | |
1843 | status = -ENOMEM; | |
1844 | goto fail_rx; | |
1845 | } | |
1846 | ||
1847 | if (packet->endpoint != htc_hdr->eid) { | |
1848 | ath6kl_err("refreshed hdr ep (%d) does not match expected ep (%d)\n", | |
1849 | htc_hdr->eid, packet->endpoint); | |
1850 | status = -ENOMEM; | |
1851 | goto fail_rx; | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | if (lk_ahd != packet->info.rx.exp_hdr) { | |
689def90 KV |
1856 | ath6kl_err("%s(): lk_ahd mismatch! (pPkt:0x%p flags:0x%X)\n", |
1857 | __func__, packet, packet->info.rx.rx_flags); | |
471e92fd | 1858 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx expected lk_ahd", |
ef094103 | 1859 | "", &packet->info.rx.exp_hdr, 4); |
471e92fd | 1860 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx current header", |
ef094103 | 1861 | "", (u8 *)&lk_ahd, sizeof(lk_ahd)); |
bdcd8170 KV |
1862 | status = -ENOMEM; |
1863 | goto fail_rx; | |
1864 | } | |
1865 | ||
1866 | if (htc_hdr->flags & HTC_FLG_RX_TRAILER) { | |
1867 | if (htc_hdr->ctrl[0] < sizeof(struct htc_record_hdr) || | |
1868 | htc_hdr->ctrl[0] > payload_len) { | |
689def90 KV |
1869 | ath6kl_err("%s(): invalid hdr (payload len should be :%d, CB[0] is:%d)\n", |
1870 | __func__, payload_len, htc_hdr->ctrl[0]); | |
bdcd8170 KV |
1871 | status = -ENOMEM; |
1872 | goto fail_rx; | |
1873 | } | |
1874 | ||
1875 | if (packet->info.rx.rx_flags & HTC_RX_PKT_IGNORE_LOOKAHEAD) { | |
1876 | next_lkahds = NULL; | |
1877 | n_lkahds = NULL; | |
1878 | } | |
1879 | ||
1880 | status = htc_proc_trailer(target, packet->buf + HTC_HDR_LENGTH | |
1881 | + payload_len - htc_hdr->ctrl[0], | |
1882 | htc_hdr->ctrl[0], next_lkahds, | |
1883 | n_lkahds, packet->endpoint); | |
1884 | ||
1885 | if (status) | |
1886 | goto fail_rx; | |
1887 | ||
1888 | packet->act_len -= htc_hdr->ctrl[0]; | |
1889 | } | |
1890 | ||
1891 | packet->buf += HTC_HDR_LENGTH; | |
1892 | packet->act_len -= HTC_HDR_LENGTH; | |
1893 | ||
1894 | fail_rx: | |
1895 | if (status) | |
471e92fd KV |
1896 | ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad packet", |
1897 | "", packet->buf, packet->act_len); | |
bdcd8170 KV |
1898 | |
1899 | return status; | |
1900 | } | |
1901 | ||
689def90 KV |
1902 | static void ath6kl_htc_rx_complete(struct htc_endpoint *endpoint, |
1903 | struct htc_packet *packet) | |
bdcd8170 | 1904 | { |
ebf29c95 | 1905 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 1906 | "htc rx complete ep %d packet 0x%p\n", |
bdcd8170 | 1907 | endpoint->eid, packet); |
4771979a | 1908 | |
bdcd8170 KV |
1909 | endpoint->ep_cb.rx(endpoint->target, packet); |
1910 | } | |
1911 | ||
689def90 KV |
1912 | static int ath6kl_htc_rx_bundle(struct htc_target *target, |
1913 | struct list_head *rxq, | |
1914 | struct list_head *sync_compq, | |
1915 | int *n_pkt_fetched, bool part_bundle) | |
bdcd8170 KV |
1916 | { |
1917 | struct hif_scatter_req *scat_req; | |
1918 | struct htc_packet *packet; | |
3b2f5e51 | 1919 | int rem_space = target->max_rx_bndl_sz; |
bdcd8170 KV |
1920 | int n_scat_pkt, status = 0, i, len; |
1921 | ||
1922 | n_scat_pkt = get_queue_depth(rxq); | |
1923 | n_scat_pkt = min(n_scat_pkt, target->msg_per_bndl_max); | |
1924 | ||
1925 | if ((get_queue_depth(rxq) - n_scat_pkt) > 0) { | |
1926 | /* | |
1927 | * We were forced to split this bundle receive operation | |
1928 | * all packets in this partial bundle must have their | |
1929 | * lookaheads ignored. | |
1930 | */ | |
1931 | part_bundle = true; | |
1932 | ||
1933 | /* | |
1934 | * This would only happen if the target ignored our max | |
1935 | * bundle limit. | |
1936 | */ | |
689def90 KV |
1937 | ath6kl_warn("%s(): partial bundle detected num:%d , %d\n", |
1938 | __func__, get_queue_depth(rxq), n_scat_pkt); | |
bdcd8170 KV |
1939 | } |
1940 | ||
1941 | len = 0; | |
1942 | ||
ebf29c95 | 1943 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd KV |
1944 | "htc rx bundle depth %d pkts %d\n", |
1945 | get_queue_depth(rxq), n_scat_pkt); | |
bdcd8170 KV |
1946 | |
1947 | scat_req = hif_scatter_req_get(target->dev->ar); | |
1948 | ||
1949 | if (scat_req == NULL) | |
1950 | goto fail_rx_pkt; | |
1951 | ||
bdcd8170 KV |
1952 | for (i = 0; i < n_scat_pkt; i++) { |
1953 | int pad_len; | |
1954 | ||
1955 | packet = list_first_entry(rxq, struct htc_packet, list); | |
1956 | list_del(&packet->list); | |
1957 | ||
5be8824f | 1958 | pad_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
1959 | packet->act_len); |
1960 | ||
1961 | if ((rem_space - pad_len) < 0) { | |
1962 | list_add(&packet->list, rxq); | |
1963 | break; | |
1964 | } | |
1965 | ||
1966 | rem_space -= pad_len; | |
1967 | ||
1968 | if (part_bundle || (i < (n_scat_pkt - 1))) | |
1969 | /* | |
1970 | * Packet 0..n-1 cannot be checked for look-aheads | |
1971 | * since we are fetching a bundle the last packet | |
1972 | * however can have it's lookahead used | |
1973 | */ | |
1974 | packet->info.rx.rx_flags |= | |
1975 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
1976 | ||
1977 | /* NOTE: 1 HTC packet per scatter entry */ | |
1978 | scat_req->scat_list[i].buf = packet->buf; | |
1979 | scat_req->scat_list[i].len = pad_len; | |
1980 | ||
1981 | packet->info.rx.rx_flags |= HTC_RX_PKT_PART_OF_BUNDLE; | |
1982 | ||
1983 | list_add_tail(&packet->list, sync_compq); | |
1984 | ||
1985 | WARN_ON(!scat_req->scat_list[i].len); | |
1986 | len += scat_req->scat_list[i].len; | |
1987 | } | |
1988 | ||
1989 | scat_req->len = len; | |
1990 | scat_req->scat_entries = i; | |
1991 | ||
8e8ddb2b | 1992 | status = ath6kl_hif_submit_scat_req(target->dev, scat_req, true); |
bdcd8170 KV |
1993 | |
1994 | if (!status) | |
1995 | *n_pkt_fetched = i; | |
1996 | ||
1997 | /* free scatter request */ | |
1998 | hif_scatter_req_add(target->dev->ar, scat_req); | |
1999 | ||
2000 | fail_rx_pkt: | |
2001 | ||
2002 | return status; | |
2003 | } | |
2004 | ||
689def90 KV |
2005 | static int ath6kl_htc_rx_process_packets(struct htc_target *target, |
2006 | struct list_head *comp_pktq, | |
2007 | u32 lk_ahds[], | |
2008 | int *n_lk_ahd) | |
bdcd8170 KV |
2009 | { |
2010 | struct htc_packet *packet, *tmp_pkt; | |
2011 | struct htc_endpoint *ep; | |
2012 | int status = 0; | |
2013 | ||
2014 | list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) { | |
bdcd8170 KV |
2015 | ep = &target->endpoint[packet->endpoint]; |
2016 | ||
4771979a KV |
2017 | trace_ath6kl_htc_rx(packet->status, packet->endpoint, |
2018 | packet->buf, packet->act_len); | |
2019 | ||
bdcd8170 | 2020 | /* process header for each of the recv packet */ |
689def90 KV |
2021 | status = ath6kl_htc_rx_process_hdr(target, packet, lk_ahds, |
2022 | n_lk_ahd); | |
bdcd8170 KV |
2023 | if (status) |
2024 | return status; | |
2025 | ||
4159cc93 VT |
2026 | list_del(&packet->list); |
2027 | ||
bdcd8170 KV |
2028 | if (list_empty(comp_pktq)) { |
2029 | /* | |
2030 | * Last packet's more packet flag is set | |
2031 | * based on the lookahead. | |
2032 | */ | |
2033 | if (*n_lk_ahd > 0) | |
689def90 KV |
2034 | ath6kl_htc_rx_set_indicate(lk_ahds[0], |
2035 | ep, packet); | |
bdcd8170 KV |
2036 | } else |
2037 | /* | |
2038 | * Packets in a bundle automatically have | |
2039 | * this flag set. | |
2040 | */ | |
2041 | packet->info.rx.indicat_flags |= | |
2042 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
2043 | ||
689def90 | 2044 | ath6kl_htc_rx_update_stats(ep, *n_lk_ahd); |
bdcd8170 KV |
2045 | |
2046 | if (packet->info.rx.rx_flags & HTC_RX_PKT_PART_OF_BUNDLE) | |
2047 | ep->ep_st.rx_bundl += 1; | |
2048 | ||
689def90 | 2049 | ath6kl_htc_rx_complete(ep, packet); |
bdcd8170 KV |
2050 | } |
2051 | ||
2052 | return status; | |
2053 | } | |
2054 | ||
689def90 KV |
2055 | static int ath6kl_htc_rx_fetch(struct htc_target *target, |
2056 | struct list_head *rx_pktq, | |
2057 | struct list_head *comp_pktq) | |
bdcd8170 KV |
2058 | { |
2059 | int fetched_pkts; | |
2060 | bool part_bundle = false; | |
2061 | int status = 0; | |
99f54299 VT |
2062 | struct list_head tmp_rxq; |
2063 | struct htc_packet *packet, *tmp_pkt; | |
bdcd8170 KV |
2064 | |
2065 | /* now go fetch the list of HTC packets */ | |
2066 | while (!list_empty(rx_pktq)) { | |
2067 | fetched_pkts = 0; | |
2068 | ||
99f54299 VT |
2069 | INIT_LIST_HEAD(&tmp_rxq); |
2070 | ||
bdcd8170 KV |
2071 | if (target->rx_bndl_enable && (get_queue_depth(rx_pktq) > 1)) { |
2072 | /* | |
2073 | * There are enough packets to attempt a | |
2074 | * bundle transfer and recv bundling is | |
2075 | * allowed. | |
2076 | */ | |
689def90 | 2077 | status = ath6kl_htc_rx_bundle(target, rx_pktq, |
99f54299 | 2078 | &tmp_rxq, |
689def90 KV |
2079 | &fetched_pkts, |
2080 | part_bundle); | |
bdcd8170 | 2081 | if (status) |
99f54299 | 2082 | goto fail_rx; |
bdcd8170 KV |
2083 | |
2084 | if (!list_empty(rx_pktq)) | |
2085 | part_bundle = true; | |
99f54299 VT |
2086 | |
2087 | list_splice_tail_init(&tmp_rxq, comp_pktq); | |
bdcd8170 KV |
2088 | } |
2089 | ||
2090 | if (!fetched_pkts) { | |
bdcd8170 KV |
2091 | packet = list_first_entry(rx_pktq, struct htc_packet, |
2092 | list); | |
2093 | ||
bdcd8170 KV |
2094 | /* fully synchronous */ |
2095 | packet->completion = NULL; | |
2096 | ||
b8d5d5ff | 2097 | if (!list_is_singular(rx_pktq)) |
bdcd8170 KV |
2098 | /* |
2099 | * look_aheads in all packet | |
2100 | * except the last one in the | |
2101 | * bundle must be ignored | |
2102 | */ | |
2103 | packet->info.rx.rx_flags |= | |
2104 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
2105 | ||
2106 | /* go fetch the packet */ | |
689def90 KV |
2107 | status = ath6kl_htc_rx_packet(target, packet, |
2108 | packet->act_len); | |
99f54299 VT |
2109 | |
2110 | list_move_tail(&packet->list, &tmp_rxq); | |
2111 | ||
bdcd8170 | 2112 | if (status) |
99f54299 | 2113 | goto fail_rx; |
bdcd8170 | 2114 | |
99f54299 | 2115 | list_splice_tail_init(&tmp_rxq, comp_pktq); |
bdcd8170 KV |
2116 | } |
2117 | } | |
2118 | ||
99f54299 VT |
2119 | return 0; |
2120 | ||
2121 | fail_rx: | |
2122 | ||
2123 | /* | |
2124 | * Cleanup any packets we allocated but didn't use to | |
2125 | * actually fetch any packets. | |
2126 | */ | |
2127 | ||
2128 | list_for_each_entry_safe(packet, tmp_pkt, rx_pktq, list) { | |
2129 | list_del(&packet->list); | |
2130 | htc_reclaim_rxbuf(target, packet, | |
96f1fadc | 2131 | &target->endpoint[packet->endpoint]); |
99f54299 VT |
2132 | } |
2133 | ||
2134 | list_for_each_entry_safe(packet, tmp_pkt, &tmp_rxq, list) { | |
2135 | list_del(&packet->list); | |
2136 | htc_reclaim_rxbuf(target, packet, | |
96f1fadc | 2137 | &target->endpoint[packet->endpoint]); |
99f54299 VT |
2138 | } |
2139 | ||
bdcd8170 KV |
2140 | return status; |
2141 | } | |
2142 | ||
ad226ec2 | 2143 | int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target, |
4533d901 | 2144 | u32 msg_look_ahead, int *num_pkts) |
bdcd8170 KV |
2145 | { |
2146 | struct htc_packet *packets, *tmp_pkt; | |
2147 | struct htc_endpoint *endpoint; | |
2148 | struct list_head rx_pktq, comp_pktq; | |
2149 | int status = 0; | |
2150 | u32 look_aheads[HTC_HOST_MAX_MSG_PER_BUNDLE]; | |
2151 | int num_look_ahead = 1; | |
2152 | enum htc_endpoint_id id; | |
2153 | int n_fetched = 0; | |
2154 | ||
cbec267a | 2155 | INIT_LIST_HEAD(&comp_pktq); |
bdcd8170 KV |
2156 | *num_pkts = 0; |
2157 | ||
2158 | /* | |
2159 | * On first entry copy the look_aheads into our temp array for | |
2160 | * processing | |
2161 | */ | |
4533d901 | 2162 | look_aheads[0] = msg_look_ahead; |
bdcd8170 KV |
2163 | |
2164 | while (true) { | |
bdcd8170 KV |
2165 | /* |
2166 | * First lookahead sets the expected endpoint IDs for all | |
2167 | * packets in a bundle. | |
2168 | */ | |
2169 | id = ((struct htc_frame_hdr *)&look_aheads[0])->eid; | |
2170 | endpoint = &target->endpoint[id]; | |
2171 | ||
2172 | if (id >= ENDPOINT_MAX) { | |
2173 | ath6kl_err("MsgPend, invalid endpoint in look-ahead: %d\n", | |
2174 | id); | |
2175 | status = -ENOMEM; | |
2176 | break; | |
2177 | } | |
2178 | ||
2179 | INIT_LIST_HEAD(&rx_pktq); | |
2180 | INIT_LIST_HEAD(&comp_pktq); | |
2181 | ||
2182 | /* | |
2183 | * Try to allocate as many HTC RX packets indicated by the | |
2184 | * look_aheads. | |
2185 | */ | |
689def90 KV |
2186 | status = ath6kl_htc_rx_alloc(target, look_aheads, |
2187 | num_look_ahead, endpoint, | |
2188 | &rx_pktq); | |
bdcd8170 KV |
2189 | if (status) |
2190 | break; | |
2191 | ||
2192 | if (get_queue_depth(&rx_pktq) >= 2) | |
2193 | /* | |
2194 | * A recv bundle was detected, force IRQ status | |
2195 | * re-check again | |
2196 | */ | |
fcb82058 | 2197 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
2198 | |
2199 | n_fetched += get_queue_depth(&rx_pktq); | |
2200 | ||
2201 | num_look_ahead = 0; | |
2202 | ||
689def90 | 2203 | status = ath6kl_htc_rx_fetch(target, &rx_pktq, &comp_pktq); |
bdcd8170 KV |
2204 | |
2205 | if (!status) | |
689def90 | 2206 | ath6kl_htc_rx_chk_water_mark(endpoint); |
bdcd8170 KV |
2207 | |
2208 | /* Process fetched packets */ | |
689def90 KV |
2209 | status = ath6kl_htc_rx_process_packets(target, &comp_pktq, |
2210 | look_aheads, | |
2211 | &num_look_ahead); | |
bdcd8170 KV |
2212 | |
2213 | if (!num_look_ahead || status) | |
2214 | break; | |
2215 | ||
2216 | /* | |
2217 | * For SYNCH processing, if we get here, we are running | |
2218 | * through the loop again due to a detected lookahead. Set | |
2219 | * flag that we should re-check IRQ status registers again | |
2220 | * before leaving IRQ processing, this can net better | |
2221 | * performance in high throughput situations. | |
2222 | */ | |
fcb82058 | 2223 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
2224 | } |
2225 | ||
2226 | if (status) { | |
2227 | ath6kl_err("failed to get pending recv messages: %d\n", | |
2228 | status); | |
bdcd8170 KV |
2229 | |
2230 | /* cleanup any packets in sync completion queue */ | |
2231 | list_for_each_entry_safe(packets, tmp_pkt, &comp_pktq, list) { | |
2232 | list_del(&packets->list); | |
2233 | htc_reclaim_rxbuf(target, packets, | |
2234 | &target->endpoint[packets->endpoint]); | |
2235 | } | |
2236 | ||
2237 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
2238 | ath6kl_warn("host is going to stop blocking receiver for htc_stop\n"); | |
8e8ddb2b | 2239 | ath6kl_hif_rx_control(target->dev, false); |
bdcd8170 KV |
2240 | } |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * Before leaving, check to see if host ran out of buffers and | |
2245 | * needs to stop the receiver. | |
2246 | */ | |
2247 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
2248 | ath6kl_warn("host has no rx buffers blocking receiver to prevent overrun\n"); | |
8e8ddb2b | 2249 | ath6kl_hif_rx_control(target->dev, false); |
bdcd8170 KV |
2250 | } |
2251 | *num_pkts = n_fetched; | |
2252 | ||
2253 | return status; | |
2254 | } | |
2255 | ||
2256 | /* | |
2257 | * Synchronously wait for a control message from the target, | |
2258 | * This function is used at initialization time ONLY. At init messages | |
2259 | * on ENDPOINT 0 are expected. | |
2260 | */ | |
2261 | static struct htc_packet *htc_wait_for_ctrl_msg(struct htc_target *target) | |
2262 | { | |
2263 | struct htc_packet *packet = NULL; | |
2264 | struct htc_frame_hdr *htc_hdr; | |
2265 | u32 look_ahead; | |
2266 | ||
8e8ddb2b | 2267 | if (ath6kl_hif_poll_mboxmsg_rx(target->dev, &look_ahead, |
96f1fadc | 2268 | HTC_TARGET_RESPONSE_TIMEOUT)) |
bdcd8170 KV |
2269 | return NULL; |
2270 | ||
ebf29c95 | 2271 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 2272 | "htc rx wait ctrl look_ahead 0x%X\n", look_ahead); |
bdcd8170 KV |
2273 | |
2274 | htc_hdr = (struct htc_frame_hdr *)&look_ahead; | |
2275 | ||
2276 | if (htc_hdr->eid != ENDPOINT_0) | |
2277 | return NULL; | |
2278 | ||
2279 | packet = htc_get_control_buf(target, false); | |
2280 | ||
2281 | if (!packet) | |
2282 | return NULL; | |
2283 | ||
2284 | packet->info.rx.rx_flags = 0; | |
2285 | packet->info.rx.exp_hdr = look_ahead; | |
2286 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + HTC_HDR_LENGTH; | |
2287 | ||
2288 | if (packet->act_len > packet->buf_len) | |
2289 | goto fail_ctrl_rx; | |
2290 | ||
2291 | /* we want synchronous operation */ | |
2292 | packet->completion = NULL; | |
2293 | ||
2294 | /* get the message from the device, this will block */ | |
689def90 | 2295 | if (ath6kl_htc_rx_packet(target, packet, packet->act_len)) |
bdcd8170 KV |
2296 | goto fail_ctrl_rx; |
2297 | ||
4771979a KV |
2298 | trace_ath6kl_htc_rx(packet->status, packet->endpoint, |
2299 | packet->buf, packet->act_len); | |
2300 | ||
bdcd8170 | 2301 | /* process receive header */ |
689def90 | 2302 | packet->status = ath6kl_htc_rx_process_hdr(target, packet, NULL, NULL); |
bdcd8170 KV |
2303 | |
2304 | if (packet->status) { | |
689def90 | 2305 | ath6kl_err("htc_wait_for_ctrl_msg, ath6kl_htc_rx_process_hdr failed (status = %d)\n", |
bdcd8170 KV |
2306 | packet->status); |
2307 | goto fail_ctrl_rx; | |
2308 | } | |
2309 | ||
2310 | return packet; | |
2311 | ||
2312 | fail_ctrl_rx: | |
2313 | if (packet != NULL) { | |
2314 | htc_rxpkt_reset(packet); | |
2315 | reclaim_rx_ctrl_buf(target, packet); | |
2316 | } | |
2317 | ||
2318 | return NULL; | |
2319 | } | |
2320 | ||
e76ac2bf | 2321 | static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target, |
ad226ec2 | 2322 | struct list_head *pkt_queue) |
bdcd8170 KV |
2323 | { |
2324 | struct htc_endpoint *endpoint; | |
2325 | struct htc_packet *first_pkt; | |
2326 | bool rx_unblock = false; | |
2327 | int status = 0, depth; | |
2328 | ||
2329 | if (list_empty(pkt_queue)) | |
2330 | return -ENOMEM; | |
2331 | ||
2332 | first_pkt = list_first_entry(pkt_queue, struct htc_packet, list); | |
2333 | ||
2334 | if (first_pkt->endpoint >= ENDPOINT_MAX) | |
2335 | return status; | |
2336 | ||
2337 | depth = get_queue_depth(pkt_queue); | |
2338 | ||
ebf29c95 | 2339 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc | 2340 | "htc rx add multiple ep id %d cnt %d len %d\n", |
bdcd8170 KV |
2341 | first_pkt->endpoint, depth, first_pkt->buf_len); |
2342 | ||
2343 | endpoint = &target->endpoint[first_pkt->endpoint]; | |
2344 | ||
2345 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
2346 | struct htc_packet *packet, *tmp_pkt; | |
2347 | ||
2348 | /* walk through queue and mark each one canceled */ | |
2349 | list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { | |
2350 | packet->status = -ECANCELED; | |
2351 | list_del(&packet->list); | |
689def90 | 2352 | ath6kl_htc_rx_complete(endpoint, packet); |
bdcd8170 KV |
2353 | } |
2354 | ||
2355 | return status; | |
2356 | } | |
2357 | ||
2358 | spin_lock_bh(&target->rx_lock); | |
2359 | ||
2360 | list_splice_tail_init(pkt_queue, &endpoint->rx_bufq); | |
2361 | ||
2362 | /* check if we are blocked waiting for a new buffer */ | |
2363 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
2364 | if (target->ep_waiting == first_pkt->endpoint) { | |
ebf29c95 | 2365 | ath6kl_dbg(ATH6KL_DBG_HTC, |
96f1fadc KV |
2366 | "htc rx blocked on ep %d, unblocking\n", |
2367 | target->ep_waiting); | |
bdcd8170 KV |
2368 | target->rx_st_flags &= ~HTC_RECV_WAIT_BUFFERS; |
2369 | target->ep_waiting = ENDPOINT_MAX; | |
2370 | rx_unblock = true; | |
2371 | } | |
2372 | } | |
2373 | ||
2374 | spin_unlock_bh(&target->rx_lock); | |
2375 | ||
2376 | if (rx_unblock && !(target->htc_flags & HTC_OP_STATE_STOPPING)) | |
2377 | /* TODO : implement a buffer threshold count? */ | |
8e8ddb2b | 2378 | ath6kl_hif_rx_control(target->dev, true); |
bdcd8170 KV |
2379 | |
2380 | return status; | |
2381 | } | |
2382 | ||
e76ac2bf | 2383 | static void ath6kl_htc_mbox_flush_rx_buf(struct htc_target *target) |
bdcd8170 KV |
2384 | { |
2385 | struct htc_endpoint *endpoint; | |
2386 | struct htc_packet *packet, *tmp_pkt; | |
2387 | int i; | |
2388 | ||
2389 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
2390 | endpoint = &target->endpoint[i]; | |
2391 | if (!endpoint->svc_id) | |
2392 | /* not in use.. */ | |
2393 | continue; | |
2394 | ||
2395 | spin_lock_bh(&target->rx_lock); | |
2396 | list_for_each_entry_safe(packet, tmp_pkt, | |
2397 | &endpoint->rx_bufq, list) { | |
2398 | list_del(&packet->list); | |
2399 | spin_unlock_bh(&target->rx_lock); | |
ebf29c95 | 2400 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 2401 | "htc rx flush pkt 0x%p len %d ep %d\n", |
bdcd8170 KV |
2402 | packet, packet->buf_len, |
2403 | packet->endpoint); | |
5378f244 VT |
2404 | /* |
2405 | * packets in rx_bufq of endpoint 0 have originally | |
2406 | * been queued from target->free_ctrl_rxbuf where | |
2407 | * packet and packet->buf_start are allocated | |
2408 | * separately using kmalloc(). For other endpoint | |
2409 | * rx_bufq, it is allocated as skb where packet is | |
2410 | * skb->head. Take care of this difference while freeing | |
2411 | * the memory. | |
2412 | */ | |
2413 | if (packet->endpoint == ENDPOINT_0) { | |
2414 | kfree(packet->buf_start); | |
2415 | kfree(packet); | |
2416 | } else { | |
2417 | dev_kfree_skb(packet->pkt_cntxt); | |
2418 | } | |
bdcd8170 KV |
2419 | spin_lock_bh(&target->rx_lock); |
2420 | } | |
2421 | spin_unlock_bh(&target->rx_lock); | |
2422 | } | |
2423 | } | |
2424 | ||
e76ac2bf | 2425 | static int ath6kl_htc_mbox_conn_service(struct htc_target *target, |
ad226ec2 KV |
2426 | struct htc_service_connect_req *conn_req, |
2427 | struct htc_service_connect_resp *conn_resp) | |
bdcd8170 KV |
2428 | { |
2429 | struct htc_packet *rx_pkt = NULL; | |
2430 | struct htc_packet *tx_pkt = NULL; | |
2431 | struct htc_conn_service_resp *resp_msg; | |
2432 | struct htc_conn_service_msg *conn_msg; | |
2433 | struct htc_endpoint *endpoint; | |
2434 | enum htc_endpoint_id assigned_ep = ENDPOINT_MAX; | |
2435 | unsigned int max_msg_sz = 0; | |
2436 | int status = 0; | |
05aab177 | 2437 | u16 msg_id; |
bdcd8170 | 2438 | |
ebf29c95 | 2439 | ath6kl_dbg(ATH6KL_DBG_HTC, |
471e92fd | 2440 | "htc connect service target 0x%p service id 0x%x\n", |
bdcd8170 KV |
2441 | target, conn_req->svc_id); |
2442 | ||
2443 | if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) { | |
2444 | /* special case for pseudo control service */ | |
2445 | assigned_ep = ENDPOINT_0; | |
2446 | max_msg_sz = HTC_MAX_CTRL_MSG_LEN; | |
2447 | } else { | |
2448 | /* allocate a packet to send to the target */ | |
2449 | tx_pkt = htc_get_control_buf(target, true); | |
2450 | ||
2451 | if (!tx_pkt) | |
2452 | return -ENOMEM; | |
2453 | ||
2454 | conn_msg = (struct htc_conn_service_msg *)tx_pkt->buf; | |
2455 | memset(conn_msg, 0, sizeof(*conn_msg)); | |
2456 | conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID); | |
2457 | conn_msg->svc_id = cpu_to_le16(conn_req->svc_id); | |
2458 | conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags); | |
2459 | ||
2460 | set_htc_pkt_info(tx_pkt, NULL, (u8 *) conn_msg, | |
2461 | sizeof(*conn_msg) + conn_msg->svc_meta_len, | |
2462 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
2463 | ||
2464 | /* we want synchronous operation */ | |
2465 | tx_pkt->completion = NULL; | |
dfa0104c KV |
2466 | ath6kl_htc_tx_prep_pkt(tx_pkt, 0, 0, 0); |
2467 | status = ath6kl_htc_tx_issue(target, tx_pkt); | |
bdcd8170 KV |
2468 | |
2469 | if (status) | |
2470 | goto fail_tx; | |
2471 | ||
2472 | /* wait for response */ | |
2473 | rx_pkt = htc_wait_for_ctrl_msg(target); | |
2474 | ||
2475 | if (!rx_pkt) { | |
2476 | status = -ENOMEM; | |
2477 | goto fail_tx; | |
2478 | } | |
2479 | ||
2480 | resp_msg = (struct htc_conn_service_resp *)rx_pkt->buf; | |
05aab177 | 2481 | msg_id = le16_to_cpu(resp_msg->msg_id); |
bdcd8170 | 2482 | |
05aab177 | 2483 | if ((msg_id != HTC_MSG_CONN_SVC_RESP_ID) || |
ddc3d77c | 2484 | (rx_pkt->act_len < sizeof(*resp_msg))) { |
bdcd8170 KV |
2485 | status = -ENOMEM; |
2486 | goto fail_tx; | |
2487 | } | |
2488 | ||
2489 | conn_resp->resp_code = resp_msg->status; | |
2490 | /* check response status */ | |
2491 | if (resp_msg->status != HTC_SERVICE_SUCCESS) { | |
2492 | ath6kl_err("target failed service 0x%X connect request (status:%d)\n", | |
2493 | resp_msg->svc_id, resp_msg->status); | |
2494 | status = -ENOMEM; | |
2495 | goto fail_tx; | |
2496 | } | |
2497 | ||
2498 | assigned_ep = (enum htc_endpoint_id)resp_msg->eid; | |
2499 | max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz); | |
2500 | } | |
2501 | ||
86aa7c1e PP |
2502 | if (WARN_ON_ONCE(assigned_ep == ENDPOINT_UNUSED || |
2503 | assigned_ep >= ENDPOINT_MAX || !max_msg_sz)) { | |
bdcd8170 KV |
2504 | status = -ENOMEM; |
2505 | goto fail_tx; | |
2506 | } | |
2507 | ||
2508 | endpoint = &target->endpoint[assigned_ep]; | |
2509 | endpoint->eid = assigned_ep; | |
2510 | if (endpoint->svc_id) { | |
2511 | status = -ENOMEM; | |
2512 | goto fail_tx; | |
2513 | } | |
2514 | ||
2515 | /* return assigned endpoint to caller */ | |
2516 | conn_resp->endpoint = assigned_ep; | |
2517 | conn_resp->len_max = max_msg_sz; | |
2518 | ||
2519 | /* setup the endpoint */ | |
2520 | ||
2521 | /* this marks the endpoint in use */ | |
2522 | endpoint->svc_id = conn_req->svc_id; | |
2523 | ||
2524 | endpoint->max_txq_depth = conn_req->max_txq_depth; | |
2525 | endpoint->len_max = max_msg_sz; | |
2526 | endpoint->ep_cb = conn_req->ep_cb; | |
2527 | endpoint->cred_dist.svc_id = conn_req->svc_id; | |
e8c39790 | 2528 | endpoint->cred_dist.htc_ep = endpoint; |
bdcd8170 KV |
2529 | endpoint->cred_dist.endpoint = assigned_ep; |
2530 | endpoint->cred_dist.cred_sz = target->tgt_cred_sz; | |
2531 | ||
0ea10f2b CN |
2532 | switch (endpoint->svc_id) { |
2533 | case WMI_DATA_BK_SVC: | |
2534 | endpoint->tx_drop_packet_threshold = MAX_DEF_COOKIE_NUM / 3; | |
2535 | break; | |
2536 | default: | |
2537 | endpoint->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM; | |
2538 | break; | |
2539 | } | |
2540 | ||
bdcd8170 KV |
2541 | if (conn_req->max_rxmsg_sz) { |
2542 | /* | |
2543 | * Override cred_per_msg calculation, this optimizes | |
2544 | * the credit-low indications since the host will actually | |
2545 | * issue smaller messages in the Send path. | |
2546 | */ | |
2547 | if (conn_req->max_rxmsg_sz > max_msg_sz) { | |
2548 | status = -ENOMEM; | |
2549 | goto fail_tx; | |
2550 | } | |
2551 | endpoint->cred_dist.cred_per_msg = | |
2552 | conn_req->max_rxmsg_sz / target->tgt_cred_sz; | |
2553 | } else | |
2554 | endpoint->cred_dist.cred_per_msg = | |
2555 | max_msg_sz / target->tgt_cred_sz; | |
2556 | ||
2557 | if (!endpoint->cred_dist.cred_per_msg) | |
2558 | endpoint->cred_dist.cred_per_msg = 1; | |
2559 | ||
2560 | /* save local connection flags */ | |
2561 | endpoint->conn_flags = conn_req->flags; | |
2562 | ||
2563 | fail_tx: | |
2564 | if (tx_pkt) | |
2565 | htc_reclaim_txctrl_buf(target, tx_pkt); | |
2566 | ||
2567 | if (rx_pkt) { | |
2568 | htc_rxpkt_reset(rx_pkt); | |
2569 | reclaim_rx_ctrl_buf(target, rx_pkt); | |
2570 | } | |
2571 | ||
2572 | return status; | |
2573 | } | |
2574 | ||
2575 | static void reset_ep_state(struct htc_target *target) | |
2576 | { | |
2577 | struct htc_endpoint *endpoint; | |
2578 | int i; | |
2579 | ||
2580 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
2581 | endpoint = &target->endpoint[i]; | |
2582 | memset(&endpoint->cred_dist, 0, sizeof(endpoint->cred_dist)); | |
2583 | endpoint->svc_id = 0; | |
2584 | endpoint->len_max = 0; | |
2585 | endpoint->max_txq_depth = 0; | |
2586 | memset(&endpoint->ep_st, 0, | |
2587 | sizeof(endpoint->ep_st)); | |
2588 | INIT_LIST_HEAD(&endpoint->rx_bufq); | |
2589 | INIT_LIST_HEAD(&endpoint->txq); | |
2590 | endpoint->target = target; | |
2591 | } | |
2592 | ||
2593 | /* reset distribution list */ | |
3c370398 | 2594 | /* FIXME: free existing entries */ |
bdcd8170 KV |
2595 | INIT_LIST_HEAD(&target->cred_dist_list); |
2596 | } | |
2597 | ||
e76ac2bf | 2598 | static int ath6kl_htc_mbox_get_rxbuf_num(struct htc_target *target, |
ad226ec2 | 2599 | enum htc_endpoint_id endpoint) |
bdcd8170 KV |
2600 | { |
2601 | int num; | |
2602 | ||
2603 | spin_lock_bh(&target->rx_lock); | |
2604 | num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq)); | |
2605 | spin_unlock_bh(&target->rx_lock); | |
2606 | return num; | |
2607 | } | |
2608 | ||
2609 | static void htc_setup_msg_bndl(struct htc_target *target) | |
2610 | { | |
bdcd8170 KV |
2611 | /* limit what HTC can handle */ |
2612 | target->msg_per_bndl_max = min(HTC_HOST_MAX_MSG_PER_BUNDLE, | |
2613 | target->msg_per_bndl_max); | |
2614 | ||
50745af7 | 2615 | if (ath6kl_hif_enable_scatter(target->dev->ar)) { |
bdcd8170 KV |
2616 | target->msg_per_bndl_max = 0; |
2617 | return; | |
2618 | } | |
2619 | ||
2620 | /* limit bundle what the device layer can handle */ | |
50745af7 | 2621 | target->msg_per_bndl_max = min(target->max_scat_entries, |
bdcd8170 KV |
2622 | target->msg_per_bndl_max); |
2623 | ||
3ef987be | 2624 | ath6kl_dbg(ATH6KL_DBG_BOOT, |
471e92fd | 2625 | "htc bundling allowed msg_per_bndl_max %d\n", |
bdcd8170 KV |
2626 | target->msg_per_bndl_max); |
2627 | ||
2628 | /* Max rx bundle size is limited by the max tx bundle size */ | |
50745af7 | 2629 | target->max_rx_bndl_sz = target->max_xfer_szper_scatreq; |
bdcd8170 | 2630 | /* Max tx bundle size if limited by the extended mbox address range */ |
3b2f5e51 | 2631 | target->max_tx_bndl_sz = min(HIF_MBOX0_EXT_WIDTH, |
50745af7 | 2632 | target->max_xfer_szper_scatreq); |
bdcd8170 | 2633 | |
3ef987be | 2634 | ath6kl_dbg(ATH6KL_DBG_BOOT, "htc max_rx_bndl_sz %d max_tx_bndl_sz %d\n", |
3b2f5e51 | 2635 | target->max_rx_bndl_sz, target->max_tx_bndl_sz); |
bdcd8170 | 2636 | |
3b2f5e51 | 2637 | if (target->max_tx_bndl_sz) |
b29072cc CN |
2638 | /* tx_bndl_mask is enabled per AC, each has 1 bit */ |
2639 | target->tx_bndl_mask = (1 << WMM_NUM_AC) - 1; | |
bdcd8170 | 2640 | |
3b2f5e51 | 2641 | if (target->max_rx_bndl_sz) |
bdcd8170 KV |
2642 | target->rx_bndl_enable = true; |
2643 | ||
5be8824f | 2644 | if ((target->tgt_cred_sz % target->block_sz) != 0) { |
bdcd8170 KV |
2645 | ath6kl_warn("credit size: %d is not block aligned! Disabling send bundling\n", |
2646 | target->tgt_cred_sz); | |
2647 | ||
2648 | /* | |
2649 | * Disallow send bundling since the credit size is | |
2650 | * not aligned to a block size the I/O block | |
2651 | * padding will spill into the next credit buffer | |
2652 | * which is fatal. | |
2653 | */ | |
b29072cc | 2654 | target->tx_bndl_mask = 0; |
bdcd8170 KV |
2655 | } |
2656 | } | |
2657 | ||
e76ac2bf | 2658 | static int ath6kl_htc_mbox_wait_target(struct htc_target *target) |
bdcd8170 KV |
2659 | { |
2660 | struct htc_packet *packet = NULL; | |
2661 | struct htc_ready_ext_msg *rdy_msg; | |
2662 | struct htc_service_connect_req connect; | |
2663 | struct htc_service_connect_resp resp; | |
2664 | int status; | |
2665 | ||
2666 | /* we should be getting 1 control message that the target is ready */ | |
2667 | packet = htc_wait_for_ctrl_msg(target); | |
2668 | ||
2669 | if (!packet) | |
2670 | return -ENOMEM; | |
2671 | ||
2672 | /* we controlled the buffer creation so it's properly aligned */ | |
2673 | rdy_msg = (struct htc_ready_ext_msg *)packet->buf; | |
2674 | ||
2675 | if ((le16_to_cpu(rdy_msg->ver2_0_info.msg_id) != HTC_MSG_READY_ID) || | |
2676 | (packet->act_len < sizeof(struct htc_ready_msg))) { | |
2677 | status = -ENOMEM; | |
2678 | goto fail_wait_target; | |
2679 | } | |
2680 | ||
2681 | if (!rdy_msg->ver2_0_info.cred_cnt || !rdy_msg->ver2_0_info.cred_sz) { | |
2682 | status = -ENOMEM; | |
2683 | goto fail_wait_target; | |
2684 | } | |
2685 | ||
2686 | target->tgt_creds = le16_to_cpu(rdy_msg->ver2_0_info.cred_cnt); | |
2687 | target->tgt_cred_sz = le16_to_cpu(rdy_msg->ver2_0_info.cred_sz); | |
2688 | ||
3ef987be | 2689 | ath6kl_dbg(ATH6KL_DBG_BOOT, |
471e92fd | 2690 | "htc target ready credits %d size %d\n", |
bdcd8170 KV |
2691 | target->tgt_creds, target->tgt_cred_sz); |
2692 | ||
2693 | /* check if this is an extended ready message */ | |
2694 | if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) { | |
2695 | /* this is an extended message */ | |
2696 | target->htc_tgt_ver = rdy_msg->htc_ver; | |
2697 | target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl; | |
2698 | } else { | |
2699 | /* legacy */ | |
2700 | target->htc_tgt_ver = HTC_VERSION_2P0; | |
2701 | target->msg_per_bndl_max = 0; | |
2702 | } | |
2703 | ||
3ef987be | 2704 | ath6kl_dbg(ATH6KL_DBG_BOOT, "htc using protocol %s (%d)\n", |
96f1fadc KV |
2705 | (target->htc_tgt_ver == HTC_VERSION_2P0) ? "2.0" : ">= 2.1", |
2706 | target->htc_tgt_ver); | |
bdcd8170 KV |
2707 | |
2708 | if (target->msg_per_bndl_max > 0) | |
2709 | htc_setup_msg_bndl(target); | |
2710 | ||
2711 | /* setup our pseudo HTC control endpoint connection */ | |
2712 | memset(&connect, 0, sizeof(connect)); | |
2713 | memset(&resp, 0, sizeof(resp)); | |
2714 | connect.ep_cb.rx = htc_ctrl_rx; | |
2715 | connect.ep_cb.rx_refill = NULL; | |
2716 | connect.ep_cb.tx_full = NULL; | |
2717 | connect.max_txq_depth = NUM_CONTROL_BUFFERS; | |
2718 | connect.svc_id = HTC_CTRL_RSVD_SVC; | |
2719 | ||
2720 | /* connect fake service */ | |
e76ac2bf | 2721 | status = ath6kl_htc_mbox_conn_service((void *)target, &connect, &resp); |
bdcd8170 KV |
2722 | |
2723 | if (status) | |
4e3d54c7 KV |
2724 | /* |
2725 | * FIXME: this call doesn't make sense, the caller should | |
e76ac2bf | 2726 | * call ath6kl_htc_mbox_cleanup() when it wants remove htc |
4e3d54c7 | 2727 | */ |
bdcd8170 KV |
2728 | ath6kl_hif_cleanup_scatter(target->dev->ar); |
2729 | ||
2730 | fail_wait_target: | |
2731 | if (packet) { | |
2732 | htc_rxpkt_reset(packet); | |
2733 | reclaim_rx_ctrl_buf(target, packet); | |
2734 | } | |
2735 | ||
2736 | return status; | |
2737 | } | |
2738 | ||
2739 | /* | |
2740 | * Start HTC, enable interrupts and let the target know | |
2741 | * host has finished setup. | |
2742 | */ | |
e76ac2bf | 2743 | static int ath6kl_htc_mbox_start(struct htc_target *target) |
bdcd8170 KV |
2744 | { |
2745 | struct htc_packet *packet; | |
2746 | int status; | |
2747 | ||
5fe4dffb KV |
2748 | memset(&target->dev->irq_proc_reg, 0, |
2749 | sizeof(target->dev->irq_proc_reg)); | |
2750 | ||
bdcd8170 | 2751 | /* Disable interrupts at the chip level */ |
8e8ddb2b | 2752 | ath6kl_hif_disable_intrs(target->dev); |
bdcd8170 KV |
2753 | |
2754 | target->htc_flags = 0; | |
2755 | target->rx_st_flags = 0; | |
2756 | ||
2757 | /* Push control receive buffers into htc control endpoint */ | |
2758 | while ((packet = htc_get_control_buf(target, false)) != NULL) { | |
2759 | status = htc_add_rxbuf(target, packet); | |
2760 | if (status) | |
2761 | return status; | |
2762 | } | |
2763 | ||
2764 | /* NOTE: the first entry in the distribution list is ENDPOINT_0 */ | |
3c370398 | 2765 | ath6kl_credit_init(target->credit_info, &target->cred_dist_list, |
fa99e963 | 2766 | target->tgt_creds); |
bdcd8170 KV |
2767 | |
2768 | dump_cred_dist_stats(target); | |
2769 | ||
2770 | /* Indicate to the target of the setup completion */ | |
2771 | status = htc_setup_tx_complete(target); | |
2772 | ||
2773 | if (status) | |
2774 | return status; | |
2775 | ||
2776 | /* unmask interrupts */ | |
8e8ddb2b | 2777 | status = ath6kl_hif_unmask_intrs(target->dev); |
bdcd8170 KV |
2778 | |
2779 | if (status) | |
e76ac2bf | 2780 | ath6kl_htc_mbox_stop(target); |
bdcd8170 KV |
2781 | |
2782 | return status; | |
2783 | } | |
2784 | ||
8a810916 KV |
2785 | static int ath6kl_htc_reset(struct htc_target *target) |
2786 | { | |
2787 | u32 block_size, ctrl_bufsz; | |
2788 | struct htc_packet *packet; | |
2789 | int i; | |
2790 | ||
2791 | reset_ep_state(target); | |
2792 | ||
2793 | block_size = target->dev->ar->mbox_info.block_size; | |
2794 | ||
2795 | ctrl_bufsz = (block_size > HTC_MAX_CTRL_MSG_LEN) ? | |
2796 | (block_size + HTC_HDR_LENGTH) : | |
2797 | (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH); | |
2798 | ||
2799 | for (i = 0; i < NUM_CONTROL_BUFFERS; i++) { | |
2800 | packet = kzalloc(sizeof(*packet), GFP_KERNEL); | |
2801 | if (!packet) | |
2802 | return -ENOMEM; | |
2803 | ||
2804 | packet->buf_start = kzalloc(ctrl_bufsz, GFP_KERNEL); | |
2805 | if (!packet->buf_start) { | |
2806 | kfree(packet); | |
2807 | return -ENOMEM; | |
2808 | } | |
2809 | ||
2810 | packet->buf_len = ctrl_bufsz; | |
2811 | if (i < NUM_CONTROL_RX_BUFFERS) { | |
2812 | packet->act_len = 0; | |
2813 | packet->buf = packet->buf_start; | |
2814 | packet->endpoint = ENDPOINT_0; | |
2815 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
a5d8f9df | 2816 | } else { |
8a810916 | 2817 | list_add_tail(&packet->list, &target->free_ctrl_txbuf); |
a5d8f9df | 2818 | } |
8a810916 KV |
2819 | } |
2820 | ||
2821 | return 0; | |
2822 | } | |
2823 | ||
bdcd8170 | 2824 | /* htc_stop: stop interrupt reception, and flush all queued buffers */ |
e76ac2bf | 2825 | static void ath6kl_htc_mbox_stop(struct htc_target *target) |
bdcd8170 KV |
2826 | { |
2827 | spin_lock_bh(&target->htc_lock); | |
2828 | target->htc_flags |= HTC_OP_STATE_STOPPING; | |
2829 | spin_unlock_bh(&target->htc_lock); | |
2830 | ||
2831 | /* | |
2832 | * Masking interrupts is a synchronous operation, when this | |
2833 | * function returns all pending HIF I/O has completed, we can | |
2834 | * safely flush the queues. | |
2835 | */ | |
8e8ddb2b | 2836 | ath6kl_hif_mask_intrs(target->dev); |
bdcd8170 | 2837 | |
ad226ec2 | 2838 | ath6kl_htc_flush_txep_all(target); |
bdcd8170 | 2839 | |
e76ac2bf | 2840 | ath6kl_htc_mbox_flush_rx_buf(target); |
bdcd8170 | 2841 | |
8a810916 | 2842 | ath6kl_htc_reset(target); |
bdcd8170 KV |
2843 | } |
2844 | ||
e76ac2bf | 2845 | static void *ath6kl_htc_mbox_create(struct ath6kl *ar) |
bdcd8170 KV |
2846 | { |
2847 | struct htc_target *target = NULL; | |
8a810916 | 2848 | int status = 0; |
bdcd8170 KV |
2849 | |
2850 | target = kzalloc(sizeof(*target), GFP_KERNEL); | |
2851 | if (!target) { | |
2852 | ath6kl_err("unable to allocate memory\n"); | |
2853 | return NULL; | |
2854 | } | |
2855 | ||
2856 | target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); | |
2857 | if (!target->dev) { | |
2858 | ath6kl_err("unable to allocate memory\n"); | |
2859 | status = -ENOMEM; | |
8a810916 | 2860 | goto err_htc_cleanup; |
bdcd8170 KV |
2861 | } |
2862 | ||
2863 | spin_lock_init(&target->htc_lock); | |
2864 | spin_lock_init(&target->rx_lock); | |
2865 | spin_lock_init(&target->tx_lock); | |
2866 | ||
2867 | INIT_LIST_HEAD(&target->free_ctrl_txbuf); | |
2868 | INIT_LIST_HEAD(&target->free_ctrl_rxbuf); | |
2869 | INIT_LIST_HEAD(&target->cred_dist_list); | |
2870 | ||
2871 | target->dev->ar = ar; | |
2872 | target->dev->htc_cnxt = target; | |
bdcd8170 KV |
2873 | target->ep_waiting = ENDPOINT_MAX; |
2874 | ||
8e8ddb2b | 2875 | status = ath6kl_hif_setup(target->dev); |
bdcd8170 | 2876 | if (status) |
8a810916 | 2877 | goto err_htc_cleanup; |
bdcd8170 | 2878 | |
8a810916 KV |
2879 | status = ath6kl_htc_reset(target); |
2880 | if (status) | |
2881 | goto err_htc_cleanup; | |
bdcd8170 | 2882 | |
8a810916 | 2883 | return target; |
bdcd8170 | 2884 | |
8a810916 | 2885 | err_htc_cleanup: |
e76ac2bf | 2886 | ath6kl_htc_mbox_cleanup(target); |
bdcd8170 | 2887 | |
8a810916 | 2888 | return NULL; |
bdcd8170 KV |
2889 | } |
2890 | ||
2891 | /* cleanup the HTC instance */ | |
e76ac2bf | 2892 | static void ath6kl_htc_mbox_cleanup(struct htc_target *target) |
bdcd8170 KV |
2893 | { |
2894 | struct htc_packet *packet, *tmp_packet; | |
2895 | ||
cf0dfa13 | 2896 | ath6kl_hif_cleanup_scatter(target->dev->ar); |
bdcd8170 KV |
2897 | |
2898 | list_for_each_entry_safe(packet, tmp_packet, | |
96f1fadc | 2899 | &target->free_ctrl_txbuf, list) { |
bdcd8170 KV |
2900 | list_del(&packet->list); |
2901 | kfree(packet->buf_start); | |
2902 | kfree(packet); | |
2903 | } | |
2904 | ||
2905 | list_for_each_entry_safe(packet, tmp_packet, | |
96f1fadc | 2906 | &target->free_ctrl_rxbuf, list) { |
bdcd8170 KV |
2907 | list_del(&packet->list); |
2908 | kfree(packet->buf_start); | |
2909 | kfree(packet); | |
2910 | } | |
2911 | ||
2912 | kfree(target->dev); | |
2913 | kfree(target); | |
2914 | } | |
e76ac2bf KV |
2915 | |
2916 | static const struct ath6kl_htc_ops ath6kl_htc_mbox_ops = { | |
2917 | .create = ath6kl_htc_mbox_create, | |
2918 | .wait_target = ath6kl_htc_mbox_wait_target, | |
2919 | .start = ath6kl_htc_mbox_start, | |
2920 | .conn_service = ath6kl_htc_mbox_conn_service, | |
2921 | .tx = ath6kl_htc_mbox_tx, | |
2922 | .stop = ath6kl_htc_mbox_stop, | |
2923 | .cleanup = ath6kl_htc_mbox_cleanup, | |
2924 | .flush_txep = ath6kl_htc_mbox_flush_txep, | |
2925 | .flush_rx_buf = ath6kl_htc_mbox_flush_rx_buf, | |
2926 | .activity_changed = ath6kl_htc_mbox_activity_changed, | |
2927 | .get_rxbuf_num = ath6kl_htc_mbox_get_rxbuf_num, | |
2928 | .add_rxbuf_multiple = ath6kl_htc_mbox_add_rxbuf_multiple, | |
2929 | .credit_setup = ath6kl_htc_mbox_credit_setup, | |
2930 | }; | |
2931 | ||
2932 | void ath6kl_htc_mbox_attach(struct ath6kl *ar) | |
2933 | { | |
2934 | ar->htc_ops = &ath6kl_htc_mbox_ops; | |
2935 | } |