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bdcd8170 KV |
1 | /* |
2 | * Copyright (c) 2007-2011 Atheros Communications Inc. | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "core.h" | |
18 | #include "htc_hif.h" | |
19 | #include "debug.h" | |
20 | #include "hif-ops.h" | |
21 | #include <asm/unaligned.h> | |
22 | ||
23 | #define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask)) | |
24 | ||
25 | static void htc_prep_send_pkt(struct htc_packet *packet, u8 flags, int ctrl0, | |
26 | int ctrl1) | |
27 | { | |
28 | struct htc_frame_hdr *hdr; | |
29 | ||
30 | packet->buf -= HTC_HDR_LENGTH; | |
31 | hdr = (struct htc_frame_hdr *)packet->buf; | |
32 | ||
33 | /* Endianess? */ | |
34 | put_unaligned((u16)packet->act_len, &hdr->payld_len); | |
35 | hdr->flags = flags; | |
36 | hdr->eid = packet->endpoint; | |
37 | hdr->ctrl[0] = ctrl0; | |
38 | hdr->ctrl[1] = ctrl1; | |
39 | } | |
40 | ||
41 | static void htc_reclaim_txctrl_buf(struct htc_target *target, | |
42 | struct htc_packet *pkt) | |
43 | { | |
44 | spin_lock_bh(&target->htc_lock); | |
45 | list_add_tail(&pkt->list, &target->free_ctrl_txbuf); | |
46 | spin_unlock_bh(&target->htc_lock); | |
47 | } | |
48 | ||
49 | static struct htc_packet *htc_get_control_buf(struct htc_target *target, | |
50 | bool tx) | |
51 | { | |
52 | struct htc_packet *packet = NULL; | |
53 | struct list_head *buf_list; | |
54 | ||
55 | buf_list = tx ? &target->free_ctrl_txbuf : &target->free_ctrl_rxbuf; | |
56 | ||
57 | spin_lock_bh(&target->htc_lock); | |
58 | ||
59 | if (list_empty(buf_list)) { | |
60 | spin_unlock_bh(&target->htc_lock); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | packet = list_first_entry(buf_list, struct htc_packet, list); | |
65 | list_del(&packet->list); | |
66 | spin_unlock_bh(&target->htc_lock); | |
67 | ||
68 | if (tx) | |
69 | packet->buf = packet->buf_start + HTC_HDR_LENGTH; | |
70 | ||
71 | return packet; | |
72 | } | |
73 | ||
74 | static void htc_tx_comp_update(struct htc_target *target, | |
75 | struct htc_endpoint *endpoint, | |
76 | struct htc_packet *packet) | |
77 | { | |
78 | packet->completion = NULL; | |
79 | packet->buf += HTC_HDR_LENGTH; | |
80 | ||
81 | if (!packet->status) | |
82 | return; | |
83 | ||
84 | ath6kl_err("req failed (status:%d, ep:%d, len:%d creds:%d)\n", | |
85 | packet->status, packet->endpoint, packet->act_len, | |
86 | packet->info.tx.cred_used); | |
87 | ||
88 | /* on failure to submit, reclaim credits for this packet */ | |
89 | spin_lock_bh(&target->tx_lock); | |
90 | endpoint->cred_dist.cred_to_dist += | |
91 | packet->info.tx.cred_used; | |
92 | endpoint->cred_dist.txq_depth = get_queue_depth(&endpoint->txq); | |
93 | ||
94 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:0x%p dist:0x%p\n", | |
95 | target->cred_dist_cntxt, &target->cred_dist_list); | |
96 | ||
97 | ath6k_credit_distribute(target->cred_dist_cntxt, | |
98 | &target->cred_dist_list, | |
99 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
100 | ||
101 | spin_unlock_bh(&target->tx_lock); | |
102 | } | |
103 | ||
104 | static void htc_tx_complete(struct htc_endpoint *endpoint, | |
105 | struct list_head *txq) | |
106 | { | |
107 | if (list_empty(txq)) | |
108 | return; | |
109 | ||
110 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
111 | "send complete ep %d, (%d pkts)\n", | |
112 | endpoint->eid, get_queue_depth(txq)); | |
113 | ||
114 | ath6kl_tx_complete(endpoint->target->dev->ar, txq); | |
115 | } | |
116 | ||
117 | static void htc_tx_comp_handler(struct htc_target *target, | |
118 | struct htc_packet *packet) | |
119 | { | |
120 | struct htc_endpoint *endpoint = &target->endpoint[packet->endpoint]; | |
121 | struct list_head container; | |
122 | ||
123 | htc_tx_comp_update(target, endpoint, packet); | |
124 | INIT_LIST_HEAD(&container); | |
125 | list_add_tail(&packet->list, &container); | |
126 | /* do completion */ | |
127 | htc_tx_complete(endpoint, &container); | |
128 | } | |
129 | ||
e041c7f9 VT |
130 | static void htc_async_tx_scat_complete(struct htc_target *target, |
131 | struct hif_scatter_req *scat_req) | |
bdcd8170 | 132 | { |
e041c7f9 | 133 | struct htc_endpoint *endpoint; |
bdcd8170 KV |
134 | struct htc_packet *packet; |
135 | struct list_head tx_compq; | |
136 | int i; | |
137 | ||
138 | INIT_LIST_HEAD(&tx_compq); | |
139 | ||
140 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
141 | "htc_async_tx_scat_complete total len: %d entries: %d\n", | |
142 | scat_req->len, scat_req->scat_entries); | |
143 | ||
144 | if (scat_req->status) | |
145 | ath6kl_err("send scatter req failed: %d\n", scat_req->status); | |
146 | ||
e041c7f9 VT |
147 | packet = scat_req->scat_list[0].packet; |
148 | endpoint = &target->endpoint[packet->endpoint]; | |
149 | ||
bdcd8170 KV |
150 | /* walk through the scatter list and process */ |
151 | for (i = 0; i < scat_req->scat_entries; i++) { | |
152 | packet = scat_req->scat_list[i].packet; | |
153 | if (!packet) { | |
154 | WARN_ON(1); | |
155 | return; | |
156 | } | |
157 | ||
158 | packet->status = scat_req->status; | |
159 | htc_tx_comp_update(target, endpoint, packet); | |
160 | list_add_tail(&packet->list, &tx_compq); | |
161 | } | |
162 | ||
163 | /* free scatter request */ | |
164 | hif_scatter_req_add(target->dev->ar, scat_req); | |
165 | ||
166 | /* complete all packets */ | |
167 | htc_tx_complete(endpoint, &tx_compq); | |
168 | } | |
169 | ||
170 | static int htc_issue_send(struct htc_target *target, struct htc_packet *packet) | |
171 | { | |
172 | int status; | |
173 | bool sync = false; | |
174 | u32 padded_len, send_len; | |
175 | ||
176 | if (!packet->completion) | |
177 | sync = true; | |
178 | ||
179 | send_len = packet->act_len + HTC_HDR_LENGTH; | |
180 | ||
181 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "%s: transmit len : %d (%s)\n", | |
182 | __func__, send_len, sync ? "sync" : "async"); | |
183 | ||
5be8824f | 184 | padded_len = CALC_TXRX_PADDED_LEN(target, send_len); |
bdcd8170 KV |
185 | |
186 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
187 | "DevSendPacket, padded len: %d mbox:0x%X (mode:%s)\n", | |
188 | padded_len, | |
189 | target->dev->ar->mbox_info.htc_addr, | |
190 | sync ? "sync" : "async"); | |
191 | ||
192 | if (sync) { | |
193 | status = hif_read_write_sync(target->dev->ar, | |
194 | target->dev->ar->mbox_info.htc_addr, | |
195 | packet->buf, padded_len, | |
196 | HIF_WR_SYNC_BLOCK_INC); | |
197 | ||
198 | packet->status = status; | |
199 | packet->buf += HTC_HDR_LENGTH; | |
200 | } else | |
201 | status = hif_write_async(target->dev->ar, | |
202 | target->dev->ar->mbox_info.htc_addr, | |
203 | packet->buf, padded_len, | |
204 | HIF_WR_ASYNC_BLOCK_INC, packet); | |
205 | ||
206 | return status; | |
207 | } | |
208 | ||
209 | static int htc_check_credits(struct htc_target *target, | |
210 | struct htc_endpoint *ep, u8 *flags, | |
211 | enum htc_endpoint_id eid, unsigned int len, | |
212 | int *req_cred) | |
213 | { | |
214 | ||
215 | *req_cred = (len > target->tgt_cred_sz) ? | |
216 | DIV_ROUND_UP(len, target->tgt_cred_sz) : 1; | |
217 | ||
218 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "creds required:%d got:%d\n", | |
219 | *req_cred, ep->cred_dist.credits); | |
220 | ||
221 | if (ep->cred_dist.credits < *req_cred) { | |
222 | if (eid == ENDPOINT_0) | |
223 | return -EINVAL; | |
224 | ||
225 | /* Seek more credits */ | |
226 | ep->cred_dist.seek_cred = *req_cred - ep->cred_dist.credits; | |
227 | ||
228 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:0x%p dist:0x%p\n", | |
229 | target->cred_dist_cntxt, &ep->cred_dist); | |
230 | ||
231 | ath6k_seek_credits(target->cred_dist_cntxt, &ep->cred_dist); | |
232 | ||
233 | ep->cred_dist.seek_cred = 0; | |
234 | ||
235 | if (ep->cred_dist.credits < *req_cred) { | |
236 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
237 | "not enough credits for ep %d - leaving packet in queue\n", | |
238 | eid); | |
239 | return -EINVAL; | |
240 | } | |
241 | } | |
242 | ||
243 | ep->cred_dist.credits -= *req_cred; | |
244 | ep->ep_st.cred_cosumd += *req_cred; | |
245 | ||
246 | /* When we are getting low on credits, ask for more */ | |
247 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
248 | ep->cred_dist.seek_cred = | |
249 | ep->cred_dist.cred_per_msg - ep->cred_dist.credits; | |
250 | ||
251 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:0x%p dist:0x%p\n", | |
252 | target->cred_dist_cntxt, &ep->cred_dist); | |
253 | ||
254 | ath6k_seek_credits(target->cred_dist_cntxt, &ep->cred_dist); | |
255 | ||
256 | /* see if we were successful in getting more */ | |
257 | if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { | |
258 | /* tell the target we need credits ASAP! */ | |
259 | *flags |= HTC_FLAGS_NEED_CREDIT_UPDATE; | |
260 | ep->ep_st.cred_low_indicate += 1; | |
261 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "host needs credits\n"); | |
262 | } | |
263 | } | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static void htc_tx_pkts_get(struct htc_target *target, | |
269 | struct htc_endpoint *endpoint, | |
270 | struct list_head *queue) | |
271 | { | |
272 | int req_cred; | |
273 | u8 flags; | |
274 | struct htc_packet *packet; | |
275 | unsigned int len; | |
276 | ||
277 | while (true) { | |
278 | ||
279 | flags = 0; | |
280 | ||
281 | if (list_empty(&endpoint->txq)) | |
282 | break; | |
283 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
284 | list); | |
285 | ||
286 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
287 | "got head pkt:0x%p , queue depth: %d\n", | |
288 | packet, get_queue_depth(&endpoint->txq)); | |
289 | ||
5be8824f | 290 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
291 | packet->act_len + HTC_HDR_LENGTH); |
292 | ||
293 | if (htc_check_credits(target, endpoint, &flags, | |
294 | packet->endpoint, len, &req_cred)) | |
295 | break; | |
296 | ||
297 | /* now we can fully move onto caller's queue */ | |
298 | packet = list_first_entry(&endpoint->txq, struct htc_packet, | |
299 | list); | |
300 | list_move_tail(&packet->list, queue); | |
301 | ||
302 | /* save the number of credits this packet consumed */ | |
303 | packet->info.tx.cred_used = req_cred; | |
304 | ||
305 | /* all TX packets are handled asynchronously */ | |
306 | packet->completion = htc_tx_comp_handler; | |
307 | packet->context = target; | |
308 | endpoint->ep_st.tx_issued += 1; | |
309 | ||
310 | /* save send flags */ | |
311 | packet->info.tx.flags = flags; | |
312 | packet->info.tx.seqno = endpoint->seqno; | |
313 | endpoint->seqno++; | |
314 | } | |
315 | } | |
316 | ||
317 | /* See if the padded tx length falls on a credit boundary */ | |
318 | static int htc_get_credit_padding(unsigned int cred_sz, int *len, | |
319 | struct htc_endpoint *ep) | |
320 | { | |
321 | int rem_cred, cred_pad; | |
322 | ||
323 | rem_cred = *len % cred_sz; | |
324 | ||
325 | /* No padding needed */ | |
326 | if (!rem_cred) | |
327 | return 0; | |
328 | ||
329 | if (!(ep->conn_flags & HTC_FLGS_TX_BNDL_PAD_EN)) | |
330 | return -1; | |
331 | ||
332 | /* | |
333 | * The transfer consumes a "partial" credit, this | |
334 | * packet cannot be bundled unless we add | |
335 | * additional "dummy" padding (max 255 bytes) to | |
336 | * consume the entire credit. | |
337 | */ | |
338 | cred_pad = *len < cred_sz ? (cred_sz - *len) : rem_cred; | |
339 | ||
340 | if ((cred_pad > 0) && (cred_pad <= 255)) | |
341 | *len += cred_pad; | |
342 | else | |
343 | /* The amount of padding is too large, send as non-bundled */ | |
344 | return -1; | |
345 | ||
346 | return cred_pad; | |
347 | } | |
348 | ||
349 | static int htc_setup_send_scat_list(struct htc_target *target, | |
350 | struct htc_endpoint *endpoint, | |
351 | struct hif_scatter_req *scat_req, | |
352 | int n_scat, | |
353 | struct list_head *queue) | |
354 | { | |
355 | struct htc_packet *packet; | |
356 | int i, len, rem_scat, cred_pad; | |
357 | int status = 0; | |
358 | ||
3b2f5e51 | 359 | rem_scat = target->max_tx_bndl_sz; |
bdcd8170 KV |
360 | |
361 | for (i = 0; i < n_scat; i++) { | |
362 | scat_req->scat_list[i].packet = NULL; | |
363 | ||
364 | if (list_empty(queue)) | |
365 | break; | |
366 | ||
367 | packet = list_first_entry(queue, struct htc_packet, list); | |
5be8824f | 368 | len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
369 | packet->act_len + HTC_HDR_LENGTH); |
370 | ||
371 | cred_pad = htc_get_credit_padding(target->tgt_cred_sz, | |
372 | &len, endpoint); | |
373 | if (cred_pad < 0) { | |
374 | status = -EINVAL; | |
375 | break; | |
376 | } | |
377 | ||
378 | if (rem_scat < len) { | |
379 | /* exceeds what we can transfer */ | |
380 | status = -ENOSPC; | |
381 | break; | |
382 | } | |
383 | ||
384 | rem_scat -= len; | |
385 | /* now remove it from the queue */ | |
386 | packet = list_first_entry(queue, struct htc_packet, list); | |
387 | list_del(&packet->list); | |
388 | ||
389 | scat_req->scat_list[i].packet = packet; | |
390 | /* prepare packet and flag message as part of a send bundle */ | |
391 | htc_prep_send_pkt(packet, | |
392 | packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE, | |
393 | cred_pad, packet->info.tx.seqno); | |
394 | scat_req->scat_list[i].buf = packet->buf; | |
395 | scat_req->scat_list[i].len = len; | |
396 | ||
397 | scat_req->len += len; | |
398 | scat_req->scat_entries++; | |
399 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
400 | "%d, adding pkt : 0x%p len:%d (remaining space:%d)\n", | |
401 | i, packet, len, rem_scat); | |
402 | } | |
403 | ||
404 | /* Roll back scatter setup in case of any failure */ | |
405 | if (status || (scat_req->scat_entries < HTC_MIN_HTC_MSGS_TO_BUNDLE)) { | |
406 | for (i = scat_req->scat_entries - 1; i >= 0; i--) { | |
407 | packet = scat_req->scat_list[i].packet; | |
408 | if (packet) { | |
409 | packet->buf += HTC_HDR_LENGTH; | |
410 | list_add(&packet->list, queue); | |
411 | } | |
412 | } | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | /* | |
420 | * htc_issue_send_bundle: drain a queue and send as bundles | |
421 | * this function may return without fully draining the queue | |
422 | * when | |
423 | * | |
424 | * 1. scatter resources are exhausted | |
425 | * 2. a message that will consume a partial credit will stop the | |
426 | * bundling process early | |
427 | * 3. we drop below the minimum number of messages for a bundle | |
428 | */ | |
429 | static void htc_issue_send_bundle(struct htc_endpoint *endpoint, | |
430 | struct list_head *queue, | |
431 | int *sent_bundle, int *n_bundle_pkts) | |
432 | { | |
433 | struct htc_target *target = endpoint->target; | |
434 | struct hif_scatter_req *scat_req = NULL; | |
bdcd8170 KV |
435 | int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0; |
436 | ||
bdcd8170 KV |
437 | while (true) { |
438 | n_scat = get_queue_depth(queue); | |
439 | n_scat = min(n_scat, target->msg_per_bndl_max); | |
440 | ||
441 | if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE) | |
442 | /* not enough to bundle */ | |
443 | break; | |
444 | ||
445 | scat_req = hif_scatter_req_get(target->dev->ar); | |
446 | ||
447 | if (!scat_req) { | |
448 | /* no scatter resources */ | |
449 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
450 | "no more scatter resources\n"); | |
451 | break; | |
452 | } | |
453 | ||
454 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "pkts to scatter: %d\n", | |
455 | n_scat); | |
456 | ||
457 | scat_req->len = 0; | |
458 | scat_req->scat_entries = 0; | |
459 | ||
460 | if (htc_setup_send_scat_list(target, endpoint, scat_req, | |
461 | n_scat, queue)) { | |
462 | hif_scatter_req_add(target->dev->ar, scat_req); | |
463 | break; | |
464 | } | |
465 | ||
466 | /* send path is always asynchronous */ | |
467 | scat_req->complete = htc_async_tx_scat_complete; | |
bdcd8170 KV |
468 | n_sent_bundle++; |
469 | tot_pkts_bundle += scat_req->scat_entries; | |
470 | ||
471 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
472 | "send scatter total bytes: %d , entries: %d\n", | |
473 | scat_req->len, scat_req->scat_entries); | |
474 | ath6kldev_submit_scat_req(target->dev, scat_req, false); | |
475 | } | |
476 | ||
477 | *sent_bundle = n_sent_bundle; | |
478 | *n_bundle_pkts = tot_pkts_bundle; | |
479 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "htc_issue_send_bundle (sent:%d)\n", | |
480 | n_sent_bundle); | |
481 | ||
482 | return; | |
483 | } | |
484 | ||
485 | static void htc_tx_from_ep_txq(struct htc_target *target, | |
486 | struct htc_endpoint *endpoint) | |
487 | { | |
488 | struct list_head txq; | |
489 | struct htc_packet *packet; | |
490 | int bundle_sent; | |
491 | int n_pkts_bundle; | |
492 | ||
493 | spin_lock_bh(&target->tx_lock); | |
494 | ||
495 | endpoint->tx_proc_cnt++; | |
496 | if (endpoint->tx_proc_cnt > 1) { | |
497 | endpoint->tx_proc_cnt--; | |
498 | spin_unlock_bh(&target->tx_lock); | |
499 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "htc_try_send (busy)\n"); | |
500 | return; | |
501 | } | |
502 | ||
503 | /* | |
504 | * drain the endpoint TX queue for transmission as long | |
505 | * as we have enough credits. | |
506 | */ | |
507 | INIT_LIST_HEAD(&txq); | |
508 | ||
509 | while (true) { | |
510 | ||
511 | if (list_empty(&endpoint->txq)) | |
512 | break; | |
513 | ||
514 | htc_tx_pkts_get(target, endpoint, &txq); | |
515 | ||
516 | if (list_empty(&txq)) | |
517 | break; | |
518 | ||
519 | spin_unlock_bh(&target->tx_lock); | |
520 | ||
521 | bundle_sent = 0; | |
522 | n_pkts_bundle = 0; | |
523 | ||
524 | while (true) { | |
525 | /* try to send a bundle on each pass */ | |
526 | if ((target->tx_bndl_enable) && | |
527 | (get_queue_depth(&txq) >= | |
528 | HTC_MIN_HTC_MSGS_TO_BUNDLE)) { | |
529 | int temp1 = 0, temp2 = 0; | |
530 | ||
531 | htc_issue_send_bundle(endpoint, &txq, | |
532 | &temp1, &temp2); | |
533 | bundle_sent += temp1; | |
534 | n_pkts_bundle += temp2; | |
535 | } | |
536 | ||
537 | if (list_empty(&txq)) | |
538 | break; | |
539 | ||
540 | packet = list_first_entry(&txq, struct htc_packet, | |
541 | list); | |
542 | list_del(&packet->list); | |
543 | ||
544 | htc_prep_send_pkt(packet, packet->info.tx.flags, | |
545 | 0, packet->info.tx.seqno); | |
546 | htc_issue_send(target, packet); | |
547 | } | |
548 | ||
549 | spin_lock_bh(&target->tx_lock); | |
550 | ||
551 | endpoint->ep_st.tx_bundles += bundle_sent; | |
552 | endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle; | |
553 | } | |
554 | ||
555 | endpoint->tx_proc_cnt = 0; | |
556 | spin_unlock_bh(&target->tx_lock); | |
557 | } | |
558 | ||
559 | static bool htc_try_send(struct htc_target *target, | |
560 | struct htc_endpoint *endpoint, | |
561 | struct htc_packet *tx_pkt) | |
562 | { | |
563 | struct htc_ep_callbacks ep_cb; | |
564 | int txq_depth; | |
565 | bool overflow = false; | |
566 | ||
567 | ep_cb = endpoint->ep_cb; | |
568 | ||
569 | spin_lock_bh(&target->tx_lock); | |
570 | txq_depth = get_queue_depth(&endpoint->txq); | |
571 | spin_unlock_bh(&target->tx_lock); | |
572 | ||
573 | if (txq_depth >= endpoint->max_txq_depth) | |
574 | overflow = true; | |
575 | ||
576 | if (overflow) | |
577 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
578 | "ep %d, tx queue will overflow :%d , tx depth:%d, max:%d\n", | |
579 | endpoint->eid, overflow, txq_depth, | |
580 | endpoint->max_txq_depth); | |
581 | ||
582 | if (overflow && ep_cb.tx_full) { | |
583 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
584 | "indicating overflowed tx packet: 0x%p\n", tx_pkt); | |
585 | ||
586 | if (ep_cb.tx_full(endpoint->target, tx_pkt) == | |
587 | HTC_SEND_FULL_DROP) { | |
588 | endpoint->ep_st.tx_dropped += 1; | |
589 | return false; | |
590 | } | |
591 | } | |
592 | ||
593 | spin_lock_bh(&target->tx_lock); | |
594 | list_add_tail(&tx_pkt->list, &endpoint->txq); | |
595 | spin_unlock_bh(&target->tx_lock); | |
596 | ||
597 | htc_tx_from_ep_txq(target, endpoint); | |
598 | ||
599 | return true; | |
600 | } | |
601 | ||
602 | static void htc_chk_ep_txq(struct htc_target *target) | |
603 | { | |
604 | struct htc_endpoint *endpoint; | |
605 | struct htc_endpoint_credit_dist *cred_dist; | |
606 | ||
607 | /* | |
608 | * Run through the credit distribution list to see if there are | |
609 | * packets queued. NOTE: no locks need to be taken since the | |
610 | * distribution list is not dynamic (cannot be re-ordered) and we | |
611 | * are not modifying any state. | |
612 | */ | |
613 | list_for_each_entry(cred_dist, &target->cred_dist_list, list) { | |
614 | endpoint = (struct htc_endpoint *)cred_dist->htc_rsvd; | |
615 | ||
616 | spin_lock_bh(&target->tx_lock); | |
617 | if (!list_empty(&endpoint->txq)) { | |
618 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
619 | "ep %d has %d credits and %d packets in tx queue\n", | |
620 | cred_dist->endpoint, | |
621 | endpoint->cred_dist.credits, | |
622 | get_queue_depth(&endpoint->txq)); | |
623 | spin_unlock_bh(&target->tx_lock); | |
624 | /* | |
625 | * Try to start the stalled queue, this list is | |
626 | * ordered by priority. If there are credits | |
627 | * available the highest priority queue will get a | |
628 | * chance to reclaim credits from lower priority | |
629 | * ones. | |
630 | */ | |
631 | htc_tx_from_ep_txq(target, endpoint); | |
632 | spin_lock_bh(&target->tx_lock); | |
633 | } | |
634 | spin_unlock_bh(&target->tx_lock); | |
635 | } | |
636 | } | |
637 | ||
638 | static int htc_setup_tx_complete(struct htc_target *target) | |
639 | { | |
640 | struct htc_packet *send_pkt = NULL; | |
641 | int status; | |
642 | ||
643 | send_pkt = htc_get_control_buf(target, true); | |
644 | ||
645 | if (!send_pkt) | |
646 | return -ENOMEM; | |
647 | ||
648 | if (target->htc_tgt_ver >= HTC_VERSION_2P1) { | |
649 | struct htc_setup_comp_ext_msg *setup_comp_ext; | |
650 | u32 flags = 0; | |
651 | ||
652 | setup_comp_ext = | |
653 | (struct htc_setup_comp_ext_msg *)send_pkt->buf; | |
654 | memset(setup_comp_ext, 0, sizeof(*setup_comp_ext)); | |
655 | setup_comp_ext->msg_id = | |
656 | cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID); | |
657 | ||
658 | if (target->msg_per_bndl_max > 0) { | |
659 | /* Indicate HTC bundling to the target */ | |
660 | flags |= HTC_SETUP_COMP_FLG_RX_BNDL_EN; | |
661 | setup_comp_ext->msg_per_rxbndl = | |
662 | target->msg_per_bndl_max; | |
663 | } | |
664 | ||
665 | memcpy(&setup_comp_ext->flags, &flags, | |
666 | sizeof(setup_comp_ext->flags)); | |
667 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp_ext, | |
668 | sizeof(struct htc_setup_comp_ext_msg), | |
669 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
670 | ||
671 | } else { | |
672 | struct htc_setup_comp_msg *setup_comp; | |
673 | setup_comp = (struct htc_setup_comp_msg *)send_pkt->buf; | |
674 | memset(setup_comp, 0, sizeof(struct htc_setup_comp_msg)); | |
675 | setup_comp->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_ID); | |
676 | set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp, | |
677 | sizeof(struct htc_setup_comp_msg), | |
678 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
679 | } | |
680 | ||
681 | /* we want synchronous operation */ | |
682 | send_pkt->completion = NULL; | |
683 | htc_prep_send_pkt(send_pkt, 0, 0, 0); | |
684 | status = htc_issue_send(target, send_pkt); | |
685 | ||
686 | if (send_pkt != NULL) | |
687 | htc_reclaim_txctrl_buf(target, send_pkt); | |
688 | ||
689 | return status; | |
690 | } | |
691 | ||
692 | void htc_set_credit_dist(struct htc_target *target, | |
693 | struct htc_credit_state_info *cred_dist_cntxt, | |
694 | u16 srvc_pri_order[], int list_len) | |
695 | { | |
696 | struct htc_endpoint *endpoint; | |
697 | int i, ep; | |
698 | ||
699 | target->cred_dist_cntxt = cred_dist_cntxt; | |
700 | ||
701 | list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list, | |
702 | &target->cred_dist_list); | |
703 | ||
704 | for (i = 0; i < list_len; i++) { | |
705 | for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { | |
706 | endpoint = &target->endpoint[ep]; | |
707 | if (endpoint->svc_id == srvc_pri_order[i]) { | |
708 | list_add_tail(&endpoint->cred_dist.list, | |
709 | &target->cred_dist_list); | |
710 | break; | |
711 | } | |
712 | } | |
713 | if (ep >= ENDPOINT_MAX) { | |
714 | WARN_ON(1); | |
715 | return; | |
716 | } | |
717 | } | |
718 | } | |
719 | ||
720 | int htc_tx(struct htc_target *target, struct htc_packet *packet) | |
721 | { | |
722 | struct htc_endpoint *endpoint; | |
723 | struct list_head queue; | |
724 | ||
725 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
726 | "htc_tx: ep id: %d, buf: 0x%p, len: %d\n", | |
727 | packet->endpoint, packet->buf, packet->act_len); | |
728 | ||
729 | if (packet->endpoint >= ENDPOINT_MAX) { | |
730 | WARN_ON(1); | |
731 | return -EINVAL; | |
732 | } | |
733 | ||
734 | endpoint = &target->endpoint[packet->endpoint]; | |
735 | ||
736 | if (!htc_try_send(target, endpoint, packet)) { | |
737 | packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ? | |
738 | -ECANCELED : -ENOSPC; | |
739 | INIT_LIST_HEAD(&queue); | |
740 | list_add(&packet->list, &queue); | |
741 | htc_tx_complete(endpoint, &queue); | |
742 | } | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | /* flush endpoint TX queue */ | |
748 | void htc_flush_txep(struct htc_target *target, | |
749 | enum htc_endpoint_id eid, u16 tag) | |
750 | { | |
751 | struct htc_packet *packet, *tmp_pkt; | |
752 | struct list_head discard_q, container; | |
753 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
754 | ||
755 | if (!endpoint->svc_id) { | |
756 | WARN_ON(1); | |
757 | return; | |
758 | } | |
759 | ||
760 | /* initialize the discard queue */ | |
761 | INIT_LIST_HEAD(&discard_q); | |
762 | ||
763 | spin_lock_bh(&target->tx_lock); | |
764 | ||
765 | list_for_each_entry_safe(packet, tmp_pkt, &endpoint->txq, list) { | |
766 | if ((tag == HTC_TX_PACKET_TAG_ALL) || | |
767 | (tag == packet->info.tx.tag)) | |
768 | list_move_tail(&packet->list, &discard_q); | |
769 | } | |
770 | ||
771 | spin_unlock_bh(&target->tx_lock); | |
772 | ||
773 | list_for_each_entry_safe(packet, tmp_pkt, &discard_q, list) { | |
774 | packet->status = -ECANCELED; | |
775 | list_del(&packet->list); | |
776 | ath6kl_dbg(ATH6KL_DBG_TRC, | |
777 | "flushing tx pkt:0x%p, len:%d, ep:%d tag:0x%X\n", | |
778 | packet, packet->act_len, | |
779 | packet->endpoint, packet->info.tx.tag); | |
780 | ||
781 | INIT_LIST_HEAD(&container); | |
782 | list_add_tail(&packet->list, &container); | |
783 | htc_tx_complete(endpoint, &container); | |
784 | } | |
785 | ||
786 | } | |
787 | ||
788 | static void htc_flush_txep_all(struct htc_target *target) | |
789 | { | |
790 | struct htc_endpoint *endpoint; | |
791 | int i; | |
792 | ||
793 | dump_cred_dist_stats(target); | |
794 | ||
795 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
796 | endpoint = &target->endpoint[i]; | |
797 | if (endpoint->svc_id == 0) | |
798 | /* not in use.. */ | |
799 | continue; | |
800 | htc_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL); | |
801 | } | |
802 | } | |
803 | ||
804 | void htc_indicate_activity_change(struct htc_target *target, | |
805 | enum htc_endpoint_id eid, bool active) | |
806 | { | |
807 | struct htc_endpoint *endpoint = &target->endpoint[eid]; | |
808 | bool dist = false; | |
809 | ||
810 | if (endpoint->svc_id == 0) { | |
811 | WARN_ON(1); | |
812 | return; | |
813 | } | |
814 | ||
815 | spin_lock_bh(&target->tx_lock); | |
816 | ||
817 | if (active) { | |
818 | if (!(endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE)) { | |
819 | endpoint->cred_dist.dist_flags |= HTC_EP_ACTIVE; | |
820 | dist = true; | |
821 | } | |
822 | } else { | |
823 | if (endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE) { | |
824 | endpoint->cred_dist.dist_flags &= ~HTC_EP_ACTIVE; | |
825 | dist = true; | |
826 | } | |
827 | } | |
828 | ||
829 | if (dist) { | |
830 | endpoint->cred_dist.txq_depth = | |
831 | get_queue_depth(&endpoint->txq); | |
832 | ||
833 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:0x%p dist:0x%p\n", | |
834 | target->cred_dist_cntxt, &target->cred_dist_list); | |
835 | ||
836 | ath6k_credit_distribute(target->cred_dist_cntxt, | |
837 | &target->cred_dist_list, | |
838 | HTC_CREDIT_DIST_ACTIVITY_CHANGE); | |
839 | } | |
840 | ||
841 | spin_unlock_bh(&target->tx_lock); | |
842 | ||
843 | if (dist && !active) | |
844 | htc_chk_ep_txq(target); | |
845 | } | |
846 | ||
847 | /* HTC Rx */ | |
848 | ||
849 | static inline void htc_update_rx_stats(struct htc_endpoint *endpoint, | |
850 | int n_look_ahds) | |
851 | { | |
852 | endpoint->ep_st.rx_pkts++; | |
853 | if (n_look_ahds == 1) | |
854 | endpoint->ep_st.rx_lkahds++; | |
855 | else if (n_look_ahds > 1) | |
856 | endpoint->ep_st.rx_bundle_lkahd++; | |
857 | } | |
858 | ||
859 | static inline bool htc_valid_rx_frame_len(struct htc_target *target, | |
860 | enum htc_endpoint_id eid, int len) | |
861 | { | |
862 | return (eid == target->dev->ar->ctrl_ep) ? | |
863 | len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE; | |
864 | } | |
865 | ||
866 | static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet) | |
867 | { | |
868 | struct list_head queue; | |
869 | ||
870 | INIT_LIST_HEAD(&queue); | |
871 | list_add_tail(&packet->list, &queue); | |
872 | return htc_add_rxbuf_multiple(target, &queue); | |
873 | } | |
874 | ||
875 | static void htc_reclaim_rxbuf(struct htc_target *target, | |
876 | struct htc_packet *packet, | |
877 | struct htc_endpoint *ep) | |
878 | { | |
879 | if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) { | |
880 | htc_rxpkt_reset(packet); | |
881 | packet->status = -ECANCELED; | |
882 | ep->ep_cb.rx(ep->target, packet); | |
883 | } else { | |
884 | htc_rxpkt_reset(packet); | |
885 | htc_add_rxbuf((void *)(target), packet); | |
886 | } | |
887 | } | |
888 | ||
889 | static void reclaim_rx_ctrl_buf(struct htc_target *target, | |
890 | struct htc_packet *packet) | |
891 | { | |
892 | spin_lock_bh(&target->htc_lock); | |
893 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
894 | spin_unlock_bh(&target->htc_lock); | |
895 | } | |
896 | ||
897 | static int dev_rx_pkt(struct htc_target *target, struct htc_packet *packet, | |
898 | u32 rx_len) | |
899 | { | |
900 | struct ath6kl_device *dev = target->dev; | |
901 | u32 padded_len; | |
902 | int status; | |
903 | ||
5be8824f | 904 | padded_len = CALC_TXRX_PADDED_LEN(target, rx_len); |
bdcd8170 KV |
905 | |
906 | if (padded_len > packet->buf_len) { | |
907 | ath6kl_err("not enough receive space for packet - padlen:%d recvlen:%d bufferlen:%d\n", | |
908 | padded_len, rx_len, packet->buf_len); | |
909 | return -ENOMEM; | |
910 | } | |
911 | ||
912 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
913 | "dev_rx_pkt (0x%p : hdr:0x%X) padded len: %d mbox:0x%X (mode:%s)\n", | |
914 | packet, packet->info.rx.exp_hdr, | |
915 | padded_len, dev->ar->mbox_info.htc_addr, "sync"); | |
916 | ||
917 | status = hif_read_write_sync(dev->ar, | |
918 | dev->ar->mbox_info.htc_addr, | |
919 | packet->buf, padded_len, | |
920 | HIF_RD_SYNC_BLOCK_FIX); | |
921 | ||
922 | packet->status = status; | |
923 | ||
924 | return status; | |
925 | } | |
926 | ||
927 | /* | |
928 | * optimization for recv packets, we can indicate a | |
929 | * "hint" that there are more single-packets to fetch | |
930 | * on this endpoint. | |
931 | */ | |
932 | static void set_rxpkt_indication_flag(u32 lk_ahd, | |
933 | struct htc_endpoint *endpoint, | |
934 | struct htc_packet *packet) | |
935 | { | |
936 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)&lk_ahd; | |
937 | ||
938 | if (htc_hdr->eid == packet->endpoint) { | |
939 | if (!list_empty(&endpoint->rx_bufq)) | |
940 | packet->info.rx.indicat_flags |= | |
941 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
942 | } | |
943 | } | |
944 | ||
945 | static void chk_rx_water_mark(struct htc_endpoint *endpoint) | |
946 | { | |
947 | struct htc_ep_callbacks ep_cb = endpoint->ep_cb; | |
948 | ||
949 | if (ep_cb.rx_refill_thresh > 0) { | |
950 | spin_lock_bh(&endpoint->target->rx_lock); | |
951 | if (get_queue_depth(&endpoint->rx_bufq) | |
952 | < ep_cb.rx_refill_thresh) { | |
953 | spin_unlock_bh(&endpoint->target->rx_lock); | |
954 | ep_cb.rx_refill(endpoint->target, endpoint->eid); | |
955 | return; | |
956 | } | |
957 | spin_unlock_bh(&endpoint->target->rx_lock); | |
958 | } | |
959 | } | |
960 | ||
961 | /* This function is called with rx_lock held */ | |
962 | static int htc_setup_rxpkts(struct htc_target *target, struct htc_endpoint *ep, | |
963 | u32 *lk_ahds, struct list_head *queue, int n_msg) | |
964 | { | |
965 | struct htc_packet *packet; | |
966 | /* FIXME: type of lk_ahds can't be right */ | |
967 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)lk_ahds; | |
968 | struct htc_ep_callbacks ep_cb; | |
969 | int status = 0, j, full_len; | |
970 | bool no_recycle; | |
971 | ||
5be8824f | 972 | full_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
973 | le16_to_cpu(htc_hdr->payld_len) + |
974 | sizeof(*htc_hdr)); | |
975 | ||
976 | if (!htc_valid_rx_frame_len(target, ep->eid, full_len)) { | |
977 | ath6kl_warn("Rx buffer requested with invalid length\n"); | |
978 | return -EINVAL; | |
979 | } | |
980 | ||
981 | ep_cb = ep->ep_cb; | |
982 | for (j = 0; j < n_msg; j++) { | |
983 | ||
984 | /* | |
985 | * Reset flag, any packets allocated using the | |
986 | * rx_alloc() API cannot be recycled on | |
987 | * cleanup,they must be explicitly returned. | |
988 | */ | |
989 | no_recycle = false; | |
990 | ||
991 | if (ep_cb.rx_allocthresh && | |
992 | (full_len > ep_cb.rx_alloc_thresh)) { | |
993 | ep->ep_st.rx_alloc_thresh_hit += 1; | |
994 | ep->ep_st.rxalloc_thresh_byte += | |
995 | le16_to_cpu(htc_hdr->payld_len); | |
996 | ||
997 | spin_unlock_bh(&target->rx_lock); | |
998 | no_recycle = true; | |
999 | ||
1000 | packet = ep_cb.rx_allocthresh(ep->target, ep->eid, | |
1001 | full_len); | |
1002 | spin_lock_bh(&target->rx_lock); | |
1003 | } else { | |
1004 | /* refill handler is being used */ | |
1005 | if (list_empty(&ep->rx_bufq)) { | |
1006 | if (ep_cb.rx_refill) { | |
1007 | spin_unlock_bh(&target->rx_lock); | |
1008 | ep_cb.rx_refill(ep->target, ep->eid); | |
1009 | spin_lock_bh(&target->rx_lock); | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | if (list_empty(&ep->rx_bufq)) | |
1014 | packet = NULL; | |
1015 | else { | |
1016 | packet = list_first_entry(&ep->rx_bufq, | |
1017 | struct htc_packet, list); | |
1018 | list_del(&packet->list); | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | if (!packet) { | |
1023 | target->rx_st_flags |= HTC_RECV_WAIT_BUFFERS; | |
1024 | target->ep_waiting = ep->eid; | |
1025 | return -ENOSPC; | |
1026 | } | |
1027 | ||
1028 | /* clear flags */ | |
1029 | packet->info.rx.rx_flags = 0; | |
1030 | packet->info.rx.indicat_flags = 0; | |
1031 | packet->status = 0; | |
1032 | ||
1033 | if (no_recycle) | |
1034 | /* | |
1035 | * flag that these packets cannot be | |
1036 | * recycled, they have to be returned to | |
1037 | * the user | |
1038 | */ | |
1039 | packet->info.rx.rx_flags |= HTC_RX_PKT_NO_RECYCLE; | |
1040 | ||
1041 | /* Caller needs to free this upon any failure */ | |
1042 | list_add_tail(&packet->list, queue); | |
1043 | ||
1044 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
1045 | status = -ECANCELED; | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | if (j) { | |
1050 | packet->info.rx.rx_flags |= HTC_RX_PKT_REFRESH_HDR; | |
1051 | packet->info.rx.exp_hdr = 0xFFFFFFFF; | |
1052 | } else | |
1053 | /* set expected look ahead */ | |
1054 | packet->info.rx.exp_hdr = *lk_ahds; | |
1055 | ||
1056 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + | |
1057 | HTC_HDR_LENGTH; | |
1058 | } | |
1059 | ||
1060 | return status; | |
1061 | } | |
1062 | ||
1063 | static int alloc_and_prep_rxpkts(struct htc_target *target, | |
1064 | u32 lk_ahds[], int msg, | |
1065 | struct htc_endpoint *endpoint, | |
1066 | struct list_head *queue) | |
1067 | { | |
1068 | int status = 0; | |
1069 | struct htc_packet *packet, *tmp_pkt; | |
1070 | struct htc_frame_hdr *htc_hdr; | |
1071 | int i, n_msg; | |
1072 | ||
1073 | spin_lock_bh(&target->rx_lock); | |
1074 | ||
1075 | for (i = 0; i < msg; i++) { | |
1076 | ||
1077 | htc_hdr = (struct htc_frame_hdr *)&lk_ahds[i]; | |
1078 | ||
1079 | if (htc_hdr->eid >= ENDPOINT_MAX) { | |
1080 | ath6kl_err("invalid ep in look-ahead: %d\n", | |
1081 | htc_hdr->eid); | |
1082 | status = -ENOMEM; | |
1083 | break; | |
1084 | } | |
1085 | ||
1086 | if (htc_hdr->eid != endpoint->eid) { | |
1087 | ath6kl_err("invalid ep in look-ahead: %d should be : %d (index:%d)\n", | |
1088 | htc_hdr->eid, endpoint->eid, i); | |
1089 | status = -ENOMEM; | |
1090 | break; | |
1091 | } | |
1092 | ||
1093 | if (le16_to_cpu(htc_hdr->payld_len) > HTC_MAX_PAYLOAD_LENGTH) { | |
1094 | ath6kl_err("payload len %d exceeds max htc : %d !\n", | |
1095 | htc_hdr->payld_len, | |
1096 | (u32) HTC_MAX_PAYLOAD_LENGTH); | |
1097 | status = -ENOMEM; | |
1098 | break; | |
1099 | } | |
1100 | ||
1101 | if (endpoint->svc_id == 0) { | |
1102 | ath6kl_err("ep %d is not connected !\n", htc_hdr->eid); | |
1103 | status = -ENOMEM; | |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | if (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) { | |
1108 | /* | |
1109 | * HTC header indicates that every packet to follow | |
1110 | * has the same padded length so that it can be | |
1111 | * optimally fetched as a full bundle. | |
1112 | */ | |
1113 | n_msg = (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) >> | |
1114 | HTC_FLG_RX_BNDL_CNT_S; | |
1115 | ||
1116 | /* the count doesn't include the starter frame */ | |
1117 | n_msg++; | |
1118 | if (n_msg > target->msg_per_bndl_max) { | |
1119 | status = -ENOMEM; | |
1120 | break; | |
1121 | } | |
1122 | ||
1123 | endpoint->ep_st.rx_bundle_from_hdr += 1; | |
1124 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1125 | "htc hdr indicates :%d msg can be fetched as a bundle\n", | |
1126 | n_msg); | |
1127 | } else | |
1128 | /* HTC header only indicates 1 message to fetch */ | |
1129 | n_msg = 1; | |
1130 | ||
1131 | /* Setup packet buffers for each message */ | |
1132 | status = htc_setup_rxpkts(target, endpoint, &lk_ahds[i], queue, | |
1133 | n_msg); | |
1134 | ||
1135 | /* | |
1136 | * This is due to unavailabilty of buffers to rx entire data. | |
1137 | * Return no error so that free buffers from queue can be used | |
1138 | * to receive partial data. | |
1139 | */ | |
1140 | if (status == -ENOSPC) { | |
1141 | spin_unlock_bh(&target->rx_lock); | |
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | if (status) | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | spin_unlock_bh(&target->rx_lock); | |
1150 | ||
1151 | if (status) { | |
1152 | list_for_each_entry_safe(packet, tmp_pkt, queue, list) { | |
1153 | list_del(&packet->list); | |
1154 | htc_reclaim_rxbuf(target, packet, | |
1155 | &target->endpoint[packet->endpoint]); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | return status; | |
1160 | } | |
1161 | ||
1162 | static void htc_ctrl_rx(struct htc_target *context, struct htc_packet *packets) | |
1163 | { | |
1164 | if (packets->endpoint != ENDPOINT_0) { | |
1165 | WARN_ON(1); | |
1166 | return; | |
1167 | } | |
1168 | ||
1169 | if (packets->status == -ECANCELED) { | |
1170 | reclaim_rx_ctrl_buf(context, packets); | |
1171 | return; | |
1172 | } | |
1173 | ||
1174 | if (packets->act_len > 0) { | |
1175 | ath6kl_err("htc_ctrl_rx, got message with len:%zu\n", | |
1176 | packets->act_len + HTC_HDR_LENGTH); | |
1177 | ||
1178 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, | |
1179 | "Unexpected ENDPOINT 0 Message", | |
1180 | packets->buf - HTC_HDR_LENGTH, | |
1181 | packets->act_len + HTC_HDR_LENGTH); | |
1182 | } | |
1183 | ||
1184 | htc_reclaim_rxbuf(context, packets, &context->endpoint[0]); | |
1185 | } | |
1186 | ||
1187 | static void htc_proc_cred_rpt(struct htc_target *target, | |
1188 | struct htc_credit_report *rpt, | |
1189 | int n_entries, | |
1190 | enum htc_endpoint_id from_ep) | |
1191 | { | |
1192 | struct htc_endpoint *endpoint; | |
1193 | int tot_credits = 0, i; | |
1194 | bool dist = false; | |
1195 | ||
1196 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
1197 | "htc_proc_cred_rpt, credit report entries:%d\n", n_entries); | |
1198 | ||
1199 | spin_lock_bh(&target->tx_lock); | |
1200 | ||
1201 | for (i = 0; i < n_entries; i++, rpt++) { | |
1202 | if (rpt->eid >= ENDPOINT_MAX) { | |
1203 | WARN_ON(1); | |
1204 | spin_unlock_bh(&target->tx_lock); | |
1205 | return; | |
1206 | } | |
1207 | ||
1208 | endpoint = &target->endpoint[rpt->eid]; | |
1209 | ||
1210 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, " ep %d got %d credits\n", | |
1211 | rpt->eid, rpt->credits); | |
1212 | ||
1213 | endpoint->ep_st.tx_cred_rpt += 1; | |
1214 | endpoint->ep_st.cred_retnd += rpt->credits; | |
1215 | ||
1216 | if (from_ep == rpt->eid) { | |
1217 | /* | |
1218 | * This credit report arrived on the same endpoint | |
1219 | * indicating it arrived in an RX packet. | |
1220 | */ | |
1221 | endpoint->ep_st.cred_from_rx += rpt->credits; | |
1222 | endpoint->ep_st.cred_rpt_from_rx += 1; | |
1223 | } else if (from_ep == ENDPOINT_0) { | |
1224 | /* credit arrived on endpoint 0 as a NULL message */ | |
1225 | endpoint->ep_st.cred_from_ep0 += rpt->credits; | |
1226 | endpoint->ep_st.cred_rpt_ep0 += 1; | |
1227 | } else { | |
1228 | endpoint->ep_st.cred_from_other += rpt->credits; | |
1229 | endpoint->ep_st.cred_rpt_from_other += 1; | |
1230 | } | |
1231 | ||
1232 | if (ENDPOINT_0 == rpt->eid) | |
1233 | /* always give endpoint 0 credits back */ | |
1234 | endpoint->cred_dist.credits += rpt->credits; | |
1235 | else { | |
1236 | endpoint->cred_dist.cred_to_dist += rpt->credits; | |
1237 | dist = true; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Refresh tx depth for distribution function that will | |
1242 | * recover these credits NOTE: this is only valid when | |
1243 | * there are credits to recover! | |
1244 | */ | |
1245 | endpoint->cred_dist.txq_depth = | |
1246 | get_queue_depth(&endpoint->txq); | |
1247 | ||
1248 | tot_credits += rpt->credits; | |
1249 | } | |
1250 | ||
1251 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, | |
1252 | "report indicated %d credits to distribute\n", | |
1253 | tot_credits); | |
1254 | ||
1255 | if (dist) { | |
1256 | /* | |
1257 | * This was a credit return based on a completed send | |
1258 | * operations note, this is done with the lock held | |
1259 | */ | |
1260 | ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:0x%p dist:0x%p\n", | |
1261 | target->cred_dist_cntxt, &target->cred_dist_list); | |
1262 | ||
1263 | ath6k_credit_distribute(target->cred_dist_cntxt, | |
1264 | &target->cred_dist_list, | |
1265 | HTC_CREDIT_DIST_SEND_COMPLETE); | |
1266 | } | |
1267 | ||
1268 | spin_unlock_bh(&target->tx_lock); | |
1269 | ||
1270 | if (tot_credits) | |
1271 | htc_chk_ep_txq(target); | |
1272 | } | |
1273 | ||
1274 | static int htc_parse_trailer(struct htc_target *target, | |
1275 | struct htc_record_hdr *record, | |
1276 | u8 *record_buf, u32 *next_lk_ahds, | |
1277 | enum htc_endpoint_id endpoint, | |
1278 | int *n_lk_ahds) | |
1279 | { | |
1280 | struct htc_bundle_lkahd_rpt *bundle_lkahd_rpt; | |
1281 | struct htc_lookahead_report *lk_ahd; | |
1282 | int len; | |
1283 | ||
1284 | switch (record->rec_id) { | |
1285 | case HTC_RECORD_CREDITS: | |
1286 | len = record->len / sizeof(struct htc_credit_report); | |
1287 | if (!len) { | |
1288 | WARN_ON(1); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | ||
1292 | htc_proc_cred_rpt(target, | |
1293 | (struct htc_credit_report *) record_buf, | |
1294 | len, endpoint); | |
1295 | break; | |
1296 | case HTC_RECORD_LOOKAHEAD: | |
1297 | len = record->len / sizeof(*lk_ahd); | |
1298 | if (!len) { | |
1299 | WARN_ON(1); | |
1300 | return -EINVAL; | |
1301 | } | |
1302 | ||
1303 | lk_ahd = (struct htc_lookahead_report *) record_buf; | |
1304 | if ((lk_ahd->pre_valid == ((~lk_ahd->post_valid) & 0xFF)) | |
1305 | && next_lk_ahds) { | |
1306 | ||
1307 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1308 | "lk_ahd report found (pre valid:0x%X, post valid:0x%X)\n", | |
1309 | lk_ahd->pre_valid, lk_ahd->post_valid); | |
1310 | ||
1311 | /* look ahead bytes are valid, copy them over */ | |
1312 | memcpy((u8 *)&next_lk_ahds[0], lk_ahd->lk_ahd, 4); | |
1313 | ||
1314 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "Next Look Ahead", | |
1315 | next_lk_ahds, 4); | |
1316 | ||
1317 | *n_lk_ahds = 1; | |
1318 | } | |
1319 | break; | |
1320 | case HTC_RECORD_LOOKAHEAD_BUNDLE: | |
1321 | len = record->len / sizeof(*bundle_lkahd_rpt); | |
1322 | if (!len || (len > HTC_HOST_MAX_MSG_PER_BUNDLE)) { | |
1323 | WARN_ON(1); | |
1324 | return -EINVAL; | |
1325 | } | |
1326 | ||
1327 | if (next_lk_ahds) { | |
1328 | int i; | |
1329 | ||
1330 | bundle_lkahd_rpt = | |
1331 | (struct htc_bundle_lkahd_rpt *) record_buf; | |
1332 | ||
1333 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "Bundle lk_ahd", | |
1334 | record_buf, record->len); | |
1335 | ||
1336 | for (i = 0; i < len; i++) { | |
1337 | memcpy((u8 *)&next_lk_ahds[i], | |
1338 | bundle_lkahd_rpt->lk_ahd, 4); | |
1339 | bundle_lkahd_rpt++; | |
1340 | } | |
1341 | ||
1342 | *n_lk_ahds = i; | |
1343 | } | |
1344 | break; | |
1345 | default: | |
1346 | ath6kl_err("unhandled record: id:%d len:%d\n", | |
1347 | record->rec_id, record->len); | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | ||
1353 | } | |
1354 | ||
1355 | static int htc_proc_trailer(struct htc_target *target, | |
1356 | u8 *buf, int len, u32 *next_lk_ahds, | |
1357 | int *n_lk_ahds, enum htc_endpoint_id endpoint) | |
1358 | { | |
1359 | struct htc_record_hdr *record; | |
1360 | int orig_len; | |
1361 | int status; | |
1362 | u8 *record_buf; | |
1363 | u8 *orig_buf; | |
1364 | ||
1365 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, "+htc_proc_trailer (len:%d)\n", len); | |
1366 | ||
1367 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "Recv Trailer", buf, len); | |
1368 | ||
1369 | orig_buf = buf; | |
1370 | orig_len = len; | |
1371 | status = 0; | |
1372 | ||
1373 | while (len > 0) { | |
1374 | ||
1375 | if (len < sizeof(struct htc_record_hdr)) { | |
1376 | status = -ENOMEM; | |
1377 | break; | |
1378 | } | |
1379 | /* these are byte aligned structs */ | |
1380 | record = (struct htc_record_hdr *) buf; | |
1381 | len -= sizeof(struct htc_record_hdr); | |
1382 | buf += sizeof(struct htc_record_hdr); | |
1383 | ||
1384 | if (record->len > len) { | |
1385 | ath6kl_err("invalid record len: %d (id:%d) buf has: %d bytes left\n", | |
1386 | record->len, record->rec_id, len); | |
1387 | status = -ENOMEM; | |
1388 | break; | |
1389 | } | |
1390 | record_buf = buf; | |
1391 | ||
1392 | status = htc_parse_trailer(target, record, record_buf, | |
1393 | next_lk_ahds, endpoint, n_lk_ahds); | |
1394 | ||
1395 | if (status) | |
1396 | break; | |
1397 | ||
1398 | /* advance buffer past this record for next time around */ | |
1399 | buf += record->len; | |
1400 | len -= record->len; | |
1401 | } | |
1402 | ||
1403 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "BAD Recv Trailer", | |
1404 | orig_buf, orig_len); | |
1405 | ||
1406 | return status; | |
1407 | } | |
1408 | ||
1409 | static int htc_proc_rxhdr(struct htc_target *target, | |
1410 | struct htc_packet *packet, | |
1411 | u32 *next_lkahds, int *n_lkahds) | |
1412 | { | |
1413 | int status = 0; | |
1414 | u16 payload_len; | |
1415 | u32 lk_ahd; | |
1416 | struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)packet->buf; | |
1417 | ||
1418 | if (n_lkahds != NULL) | |
1419 | *n_lkahds = 0; | |
1420 | ||
1421 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "HTC Recv PKT", packet->buf, | |
1422 | packet->act_len); | |
1423 | ||
1424 | /* | |
1425 | * NOTE: we cannot assume the alignment of buf, so we use the safe | |
1426 | * macros to retrieve 16 bit fields. | |
1427 | */ | |
1428 | payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len)); | |
1429 | ||
1430 | memcpy((u8 *)&lk_ahd, packet->buf, sizeof(lk_ahd)); | |
1431 | ||
1432 | if (packet->info.rx.rx_flags & HTC_RX_PKT_REFRESH_HDR) { | |
1433 | /* | |
1434 | * Refresh the expected header and the actual length as it | |
1435 | * was unknown when this packet was grabbed as part of the | |
1436 | * bundle. | |
1437 | */ | |
1438 | packet->info.rx.exp_hdr = lk_ahd; | |
1439 | packet->act_len = payload_len + HTC_HDR_LENGTH; | |
1440 | ||
1441 | /* validate the actual header that was refreshed */ | |
1442 | if (packet->act_len > packet->buf_len) { | |
1443 | ath6kl_err("refreshed hdr payload len (%d) in bundled recv is invalid (hdr: 0x%X)\n", | |
1444 | payload_len, lk_ahd); | |
1445 | /* | |
1446 | * Limit this to max buffer just to print out some | |
1447 | * of the buffer. | |
1448 | */ | |
1449 | packet->act_len = min(packet->act_len, packet->buf_len); | |
1450 | status = -ENOMEM; | |
1451 | goto fail_rx; | |
1452 | } | |
1453 | ||
1454 | if (packet->endpoint != htc_hdr->eid) { | |
1455 | ath6kl_err("refreshed hdr ep (%d) does not match expected ep (%d)\n", | |
1456 | htc_hdr->eid, packet->endpoint); | |
1457 | status = -ENOMEM; | |
1458 | goto fail_rx; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | if (lk_ahd != packet->info.rx.exp_hdr) { | |
1463 | ath6kl_err("htc_proc_rxhdr, lk_ahd mismatch! (pPkt:0x%p flags:0x%X)\n", | |
1464 | packet, packet->info.rx.rx_flags); | |
1465 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "Expected Message lk_ahd", | |
1466 | &packet->info.rx.exp_hdr, 4); | |
1467 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "Current Frame Header", | |
1468 | (u8 *)&lk_ahd, sizeof(lk_ahd)); | |
1469 | status = -ENOMEM; | |
1470 | goto fail_rx; | |
1471 | } | |
1472 | ||
1473 | if (htc_hdr->flags & HTC_FLG_RX_TRAILER) { | |
1474 | if (htc_hdr->ctrl[0] < sizeof(struct htc_record_hdr) || | |
1475 | htc_hdr->ctrl[0] > payload_len) { | |
1476 | ath6kl_err("htc_proc_rxhdr, invalid hdr (payload len should be :%d, CB[0] is:%d)\n", | |
1477 | payload_len, htc_hdr->ctrl[0]); | |
1478 | status = -ENOMEM; | |
1479 | goto fail_rx; | |
1480 | } | |
1481 | ||
1482 | if (packet->info.rx.rx_flags & HTC_RX_PKT_IGNORE_LOOKAHEAD) { | |
1483 | next_lkahds = NULL; | |
1484 | n_lkahds = NULL; | |
1485 | } | |
1486 | ||
1487 | status = htc_proc_trailer(target, packet->buf + HTC_HDR_LENGTH | |
1488 | + payload_len - htc_hdr->ctrl[0], | |
1489 | htc_hdr->ctrl[0], next_lkahds, | |
1490 | n_lkahds, packet->endpoint); | |
1491 | ||
1492 | if (status) | |
1493 | goto fail_rx; | |
1494 | ||
1495 | packet->act_len -= htc_hdr->ctrl[0]; | |
1496 | } | |
1497 | ||
1498 | packet->buf += HTC_HDR_LENGTH; | |
1499 | packet->act_len -= HTC_HDR_LENGTH; | |
1500 | ||
1501 | fail_rx: | |
1502 | if (status) | |
1503 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, "BAD HTC Recv PKT", | |
1504 | packet->buf, | |
1505 | packet->act_len < 256 ? packet->act_len : 256); | |
1506 | else { | |
1507 | if (packet->act_len > 0) | |
1508 | ath6kl_dbg_dump(ATH6KL_DBG_RAW_BYTES, | |
1509 | "HTC - Application Msg", | |
1510 | packet->buf, packet->act_len); | |
1511 | } | |
1512 | ||
1513 | return status; | |
1514 | } | |
1515 | ||
1516 | static void do_rx_completion(struct htc_endpoint *endpoint, | |
1517 | struct htc_packet *packet) | |
1518 | { | |
1519 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1520 | "htc calling ep %d recv callback on packet 0x%p\n", | |
1521 | endpoint->eid, packet); | |
1522 | endpoint->ep_cb.rx(endpoint->target, packet); | |
1523 | } | |
1524 | ||
1525 | static int htc_issue_rxpkt_bundle(struct htc_target *target, | |
1526 | struct list_head *rxq, | |
1527 | struct list_head *sync_compq, | |
1528 | int *n_pkt_fetched, bool part_bundle) | |
1529 | { | |
1530 | struct hif_scatter_req *scat_req; | |
1531 | struct htc_packet *packet; | |
3b2f5e51 | 1532 | int rem_space = target->max_rx_bndl_sz; |
bdcd8170 KV |
1533 | int n_scat_pkt, status = 0, i, len; |
1534 | ||
1535 | n_scat_pkt = get_queue_depth(rxq); | |
1536 | n_scat_pkt = min(n_scat_pkt, target->msg_per_bndl_max); | |
1537 | ||
1538 | if ((get_queue_depth(rxq) - n_scat_pkt) > 0) { | |
1539 | /* | |
1540 | * We were forced to split this bundle receive operation | |
1541 | * all packets in this partial bundle must have their | |
1542 | * lookaheads ignored. | |
1543 | */ | |
1544 | part_bundle = true; | |
1545 | ||
1546 | /* | |
1547 | * This would only happen if the target ignored our max | |
1548 | * bundle limit. | |
1549 | */ | |
1550 | ath6kl_warn("htc_issue_rxpkt_bundle : partial bundle detected num:%d , %d\n", | |
1551 | get_queue_depth(rxq), n_scat_pkt); | |
1552 | } | |
1553 | ||
1554 | len = 0; | |
1555 | ||
1556 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1557 | "htc_issue_rxpkt_bundle (numpackets: %d , actual : %d)\n", | |
1558 | get_queue_depth(rxq), n_scat_pkt); | |
1559 | ||
1560 | scat_req = hif_scatter_req_get(target->dev->ar); | |
1561 | ||
1562 | if (scat_req == NULL) | |
1563 | goto fail_rx_pkt; | |
1564 | ||
bdcd8170 KV |
1565 | for (i = 0; i < n_scat_pkt; i++) { |
1566 | int pad_len; | |
1567 | ||
1568 | packet = list_first_entry(rxq, struct htc_packet, list); | |
1569 | list_del(&packet->list); | |
1570 | ||
5be8824f | 1571 | pad_len = CALC_TXRX_PADDED_LEN(target, |
bdcd8170 KV |
1572 | packet->act_len); |
1573 | ||
1574 | if ((rem_space - pad_len) < 0) { | |
1575 | list_add(&packet->list, rxq); | |
1576 | break; | |
1577 | } | |
1578 | ||
1579 | rem_space -= pad_len; | |
1580 | ||
1581 | if (part_bundle || (i < (n_scat_pkt - 1))) | |
1582 | /* | |
1583 | * Packet 0..n-1 cannot be checked for look-aheads | |
1584 | * since we are fetching a bundle the last packet | |
1585 | * however can have it's lookahead used | |
1586 | */ | |
1587 | packet->info.rx.rx_flags |= | |
1588 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
1589 | ||
1590 | /* NOTE: 1 HTC packet per scatter entry */ | |
1591 | scat_req->scat_list[i].buf = packet->buf; | |
1592 | scat_req->scat_list[i].len = pad_len; | |
1593 | ||
1594 | packet->info.rx.rx_flags |= HTC_RX_PKT_PART_OF_BUNDLE; | |
1595 | ||
1596 | list_add_tail(&packet->list, sync_compq); | |
1597 | ||
1598 | WARN_ON(!scat_req->scat_list[i].len); | |
1599 | len += scat_req->scat_list[i].len; | |
1600 | } | |
1601 | ||
1602 | scat_req->len = len; | |
1603 | scat_req->scat_entries = i; | |
1604 | ||
1605 | status = ath6kldev_submit_scat_req(target->dev, scat_req, true); | |
1606 | ||
1607 | if (!status) | |
1608 | *n_pkt_fetched = i; | |
1609 | ||
1610 | /* free scatter request */ | |
1611 | hif_scatter_req_add(target->dev->ar, scat_req); | |
1612 | ||
1613 | fail_rx_pkt: | |
1614 | ||
1615 | return status; | |
1616 | } | |
1617 | ||
1618 | static int htc_proc_fetched_rxpkts(struct htc_target *target, | |
1619 | struct list_head *comp_pktq, u32 lk_ahds[], | |
1620 | int *n_lk_ahd) | |
1621 | { | |
1622 | struct htc_packet *packet, *tmp_pkt; | |
1623 | struct htc_endpoint *ep; | |
1624 | int status = 0; | |
1625 | ||
1626 | list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) { | |
1627 | list_del(&packet->list); | |
1628 | ep = &target->endpoint[packet->endpoint]; | |
1629 | ||
1630 | /* process header for each of the recv packet */ | |
1631 | status = htc_proc_rxhdr(target, packet, lk_ahds, n_lk_ahd); | |
1632 | if (status) | |
1633 | return status; | |
1634 | ||
1635 | if (list_empty(comp_pktq)) { | |
1636 | /* | |
1637 | * Last packet's more packet flag is set | |
1638 | * based on the lookahead. | |
1639 | */ | |
1640 | if (*n_lk_ahd > 0) | |
1641 | set_rxpkt_indication_flag(lk_ahds[0], | |
1642 | ep, packet); | |
1643 | } else | |
1644 | /* | |
1645 | * Packets in a bundle automatically have | |
1646 | * this flag set. | |
1647 | */ | |
1648 | packet->info.rx.indicat_flags |= | |
1649 | HTC_RX_FLAGS_INDICATE_MORE_PKTS; | |
1650 | ||
1651 | htc_update_rx_stats(ep, *n_lk_ahd); | |
1652 | ||
1653 | if (packet->info.rx.rx_flags & HTC_RX_PKT_PART_OF_BUNDLE) | |
1654 | ep->ep_st.rx_bundl += 1; | |
1655 | ||
1656 | do_rx_completion(ep, packet); | |
1657 | } | |
1658 | ||
1659 | return status; | |
1660 | } | |
1661 | ||
1662 | static int htc_fetch_rxpkts(struct htc_target *target, | |
1663 | struct list_head *rx_pktq, | |
1664 | struct list_head *comp_pktq) | |
1665 | { | |
1666 | int fetched_pkts; | |
1667 | bool part_bundle = false; | |
1668 | int status = 0; | |
1669 | ||
1670 | /* now go fetch the list of HTC packets */ | |
1671 | while (!list_empty(rx_pktq)) { | |
1672 | fetched_pkts = 0; | |
1673 | ||
1674 | if (target->rx_bndl_enable && (get_queue_depth(rx_pktq) > 1)) { | |
1675 | /* | |
1676 | * There are enough packets to attempt a | |
1677 | * bundle transfer and recv bundling is | |
1678 | * allowed. | |
1679 | */ | |
1680 | status = htc_issue_rxpkt_bundle(target, rx_pktq, | |
1681 | comp_pktq, | |
1682 | &fetched_pkts, | |
1683 | part_bundle); | |
1684 | if (status) | |
1685 | return status; | |
1686 | ||
1687 | if (!list_empty(rx_pktq)) | |
1688 | part_bundle = true; | |
1689 | } | |
1690 | ||
1691 | if (!fetched_pkts) { | |
1692 | struct htc_packet *packet; | |
1693 | ||
1694 | packet = list_first_entry(rx_pktq, struct htc_packet, | |
1695 | list); | |
1696 | ||
1697 | list_del(&packet->list); | |
1698 | ||
1699 | /* fully synchronous */ | |
1700 | packet->completion = NULL; | |
1701 | ||
1702 | if (!list_empty(rx_pktq)) | |
1703 | /* | |
1704 | * look_aheads in all packet | |
1705 | * except the last one in the | |
1706 | * bundle must be ignored | |
1707 | */ | |
1708 | packet->info.rx.rx_flags |= | |
1709 | HTC_RX_PKT_IGNORE_LOOKAHEAD; | |
1710 | ||
1711 | /* go fetch the packet */ | |
1712 | status = dev_rx_pkt(target, packet, packet->act_len); | |
1713 | if (status) | |
1714 | return status; | |
1715 | ||
1716 | list_add_tail(&packet->list, comp_pktq); | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | return status; | |
1721 | } | |
1722 | ||
df45f7f9 VT |
1723 | int htc_rxmsg_pending_handler(struct htc_target *target, u32 msg_look_ahead[], |
1724 | int *num_pkts) | |
bdcd8170 KV |
1725 | { |
1726 | struct htc_packet *packets, *tmp_pkt; | |
1727 | struct htc_endpoint *endpoint; | |
1728 | struct list_head rx_pktq, comp_pktq; | |
1729 | int status = 0; | |
1730 | u32 look_aheads[HTC_HOST_MAX_MSG_PER_BUNDLE]; | |
1731 | int num_look_ahead = 1; | |
1732 | enum htc_endpoint_id id; | |
1733 | int n_fetched = 0; | |
1734 | ||
1735 | *num_pkts = 0; | |
1736 | ||
1737 | /* | |
1738 | * On first entry copy the look_aheads into our temp array for | |
1739 | * processing | |
1740 | */ | |
1741 | memcpy(look_aheads, msg_look_ahead, sizeof(look_aheads)); | |
1742 | ||
1743 | while (true) { | |
1744 | ||
1745 | /* | |
1746 | * First lookahead sets the expected endpoint IDs for all | |
1747 | * packets in a bundle. | |
1748 | */ | |
1749 | id = ((struct htc_frame_hdr *)&look_aheads[0])->eid; | |
1750 | endpoint = &target->endpoint[id]; | |
1751 | ||
1752 | if (id >= ENDPOINT_MAX) { | |
1753 | ath6kl_err("MsgPend, invalid endpoint in look-ahead: %d\n", | |
1754 | id); | |
1755 | status = -ENOMEM; | |
1756 | break; | |
1757 | } | |
1758 | ||
1759 | INIT_LIST_HEAD(&rx_pktq); | |
1760 | INIT_LIST_HEAD(&comp_pktq); | |
1761 | ||
1762 | /* | |
1763 | * Try to allocate as many HTC RX packets indicated by the | |
1764 | * look_aheads. | |
1765 | */ | |
1766 | status = alloc_and_prep_rxpkts(target, look_aheads, | |
1767 | num_look_ahead, endpoint, | |
1768 | &rx_pktq); | |
1769 | if (status) | |
1770 | break; | |
1771 | ||
1772 | if (get_queue_depth(&rx_pktq) >= 2) | |
1773 | /* | |
1774 | * A recv bundle was detected, force IRQ status | |
1775 | * re-check again | |
1776 | */ | |
fcb82058 | 1777 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
1778 | |
1779 | n_fetched += get_queue_depth(&rx_pktq); | |
1780 | ||
1781 | num_look_ahead = 0; | |
1782 | ||
1783 | status = htc_fetch_rxpkts(target, &rx_pktq, &comp_pktq); | |
1784 | ||
1785 | if (!status) | |
1786 | chk_rx_water_mark(endpoint); | |
1787 | ||
1788 | /* Process fetched packets */ | |
1789 | status = htc_proc_fetched_rxpkts(target, &comp_pktq, | |
1790 | look_aheads, &num_look_ahead); | |
1791 | ||
1792 | if (!num_look_ahead || status) | |
1793 | break; | |
1794 | ||
1795 | /* | |
1796 | * For SYNCH processing, if we get here, we are running | |
1797 | * through the loop again due to a detected lookahead. Set | |
1798 | * flag that we should re-check IRQ status registers again | |
1799 | * before leaving IRQ processing, this can net better | |
1800 | * performance in high throughput situations. | |
1801 | */ | |
fcb82058 | 1802 | target->chk_irq_status_cnt = 1; |
bdcd8170 KV |
1803 | } |
1804 | ||
1805 | if (status) { | |
1806 | ath6kl_err("failed to get pending recv messages: %d\n", | |
1807 | status); | |
1808 | /* | |
1809 | * Cleanup any packets we allocated but didn't use to | |
1810 | * actually fetch any packets. | |
1811 | */ | |
1812 | list_for_each_entry_safe(packets, tmp_pkt, &rx_pktq, list) { | |
1813 | list_del(&packets->list); | |
1814 | htc_reclaim_rxbuf(target, packets, | |
1815 | &target->endpoint[packets->endpoint]); | |
1816 | } | |
1817 | ||
1818 | /* cleanup any packets in sync completion queue */ | |
1819 | list_for_each_entry_safe(packets, tmp_pkt, &comp_pktq, list) { | |
1820 | list_del(&packets->list); | |
1821 | htc_reclaim_rxbuf(target, packets, | |
1822 | &target->endpoint[packets->endpoint]); | |
1823 | } | |
1824 | ||
1825 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
1826 | ath6kl_warn("host is going to stop blocking receiver for htc_stop\n"); | |
1827 | ath6kldev_rx_control(target->dev, false); | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * Before leaving, check to see if host ran out of buffers and | |
1833 | * needs to stop the receiver. | |
1834 | */ | |
1835 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
1836 | ath6kl_warn("host has no rx buffers blocking receiver to prevent overrun\n"); | |
1837 | ath6kldev_rx_control(target->dev, false); | |
1838 | } | |
1839 | *num_pkts = n_fetched; | |
1840 | ||
1841 | return status; | |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * Synchronously wait for a control message from the target, | |
1846 | * This function is used at initialization time ONLY. At init messages | |
1847 | * on ENDPOINT 0 are expected. | |
1848 | */ | |
1849 | static struct htc_packet *htc_wait_for_ctrl_msg(struct htc_target *target) | |
1850 | { | |
1851 | struct htc_packet *packet = NULL; | |
1852 | struct htc_frame_hdr *htc_hdr; | |
1853 | u32 look_ahead; | |
1854 | ||
1855 | if (ath6kldev_poll_mboxmsg_rx(target->dev, &look_ahead, | |
1856 | HTC_TARGET_RESPONSE_TIMEOUT)) | |
1857 | return NULL; | |
1858 | ||
1859 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1860 | "htc_wait_for_ctrl_msg: look_ahead : 0x%X\n", look_ahead); | |
1861 | ||
1862 | htc_hdr = (struct htc_frame_hdr *)&look_ahead; | |
1863 | ||
1864 | if (htc_hdr->eid != ENDPOINT_0) | |
1865 | return NULL; | |
1866 | ||
1867 | packet = htc_get_control_buf(target, false); | |
1868 | ||
1869 | if (!packet) | |
1870 | return NULL; | |
1871 | ||
1872 | packet->info.rx.rx_flags = 0; | |
1873 | packet->info.rx.exp_hdr = look_ahead; | |
1874 | packet->act_len = le16_to_cpu(htc_hdr->payld_len) + HTC_HDR_LENGTH; | |
1875 | ||
1876 | if (packet->act_len > packet->buf_len) | |
1877 | goto fail_ctrl_rx; | |
1878 | ||
1879 | /* we want synchronous operation */ | |
1880 | packet->completion = NULL; | |
1881 | ||
1882 | /* get the message from the device, this will block */ | |
1883 | if (dev_rx_pkt(target, packet, packet->act_len)) | |
1884 | goto fail_ctrl_rx; | |
1885 | ||
1886 | /* process receive header */ | |
1887 | packet->status = htc_proc_rxhdr(target, packet, NULL, NULL); | |
1888 | ||
1889 | if (packet->status) { | |
1890 | ath6kl_err("htc_wait_for_ctrl_msg, htc_proc_rxhdr failed (status = %d)\n", | |
1891 | packet->status); | |
1892 | goto fail_ctrl_rx; | |
1893 | } | |
1894 | ||
1895 | return packet; | |
1896 | ||
1897 | fail_ctrl_rx: | |
1898 | if (packet != NULL) { | |
1899 | htc_rxpkt_reset(packet); | |
1900 | reclaim_rx_ctrl_buf(target, packet); | |
1901 | } | |
1902 | ||
1903 | return NULL; | |
1904 | } | |
1905 | ||
1906 | int htc_add_rxbuf_multiple(struct htc_target *target, | |
1907 | struct list_head *pkt_queue) | |
1908 | { | |
1909 | struct htc_endpoint *endpoint; | |
1910 | struct htc_packet *first_pkt; | |
1911 | bool rx_unblock = false; | |
1912 | int status = 0, depth; | |
1913 | ||
1914 | if (list_empty(pkt_queue)) | |
1915 | return -ENOMEM; | |
1916 | ||
1917 | first_pkt = list_first_entry(pkt_queue, struct htc_packet, list); | |
1918 | ||
1919 | if (first_pkt->endpoint >= ENDPOINT_MAX) | |
1920 | return status; | |
1921 | ||
1922 | depth = get_queue_depth(pkt_queue); | |
1923 | ||
1924 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1925 | "htc_add_rxbuf_multiple: ep id: %d, cnt:%d, len: %d\n", | |
1926 | first_pkt->endpoint, depth, first_pkt->buf_len); | |
1927 | ||
1928 | endpoint = &target->endpoint[first_pkt->endpoint]; | |
1929 | ||
1930 | if (target->htc_flags & HTC_OP_STATE_STOPPING) { | |
1931 | struct htc_packet *packet, *tmp_pkt; | |
1932 | ||
1933 | /* walk through queue and mark each one canceled */ | |
1934 | list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { | |
1935 | packet->status = -ECANCELED; | |
1936 | list_del(&packet->list); | |
1937 | do_rx_completion(endpoint, packet); | |
1938 | } | |
1939 | ||
1940 | return status; | |
1941 | } | |
1942 | ||
1943 | spin_lock_bh(&target->rx_lock); | |
1944 | ||
1945 | list_splice_tail_init(pkt_queue, &endpoint->rx_bufq); | |
1946 | ||
1947 | /* check if we are blocked waiting for a new buffer */ | |
1948 | if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) { | |
1949 | if (target->ep_waiting == first_pkt->endpoint) { | |
1950 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1951 | "receiver was blocked on ep:%d, unblocking.\n", | |
1952 | target->ep_waiting); | |
1953 | target->rx_st_flags &= ~HTC_RECV_WAIT_BUFFERS; | |
1954 | target->ep_waiting = ENDPOINT_MAX; | |
1955 | rx_unblock = true; | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | spin_unlock_bh(&target->rx_lock); | |
1960 | ||
1961 | if (rx_unblock && !(target->htc_flags & HTC_OP_STATE_STOPPING)) | |
1962 | /* TODO : implement a buffer threshold count? */ | |
1963 | ath6kldev_rx_control(target->dev, true); | |
1964 | ||
1965 | return status; | |
1966 | } | |
1967 | ||
1968 | void htc_flush_rx_buf(struct htc_target *target) | |
1969 | { | |
1970 | struct htc_endpoint *endpoint; | |
1971 | struct htc_packet *packet, *tmp_pkt; | |
1972 | int i; | |
1973 | ||
1974 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
1975 | endpoint = &target->endpoint[i]; | |
1976 | if (!endpoint->svc_id) | |
1977 | /* not in use.. */ | |
1978 | continue; | |
1979 | ||
1980 | spin_lock_bh(&target->rx_lock); | |
1981 | list_for_each_entry_safe(packet, tmp_pkt, | |
1982 | &endpoint->rx_bufq, list) { | |
1983 | list_del(&packet->list); | |
1984 | spin_unlock_bh(&target->rx_lock); | |
1985 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
1986 | "flushing rx pkt:0x%p, len:%d, ep:%d\n", | |
1987 | packet, packet->buf_len, | |
1988 | packet->endpoint); | |
1989 | dev_kfree_skb(packet->pkt_cntxt); | |
1990 | spin_lock_bh(&target->rx_lock); | |
1991 | } | |
1992 | spin_unlock_bh(&target->rx_lock); | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | int htc_conn_service(struct htc_target *target, | |
1997 | struct htc_service_connect_req *conn_req, | |
1998 | struct htc_service_connect_resp *conn_resp) | |
1999 | { | |
2000 | struct htc_packet *rx_pkt = NULL; | |
2001 | struct htc_packet *tx_pkt = NULL; | |
2002 | struct htc_conn_service_resp *resp_msg; | |
2003 | struct htc_conn_service_msg *conn_msg; | |
2004 | struct htc_endpoint *endpoint; | |
2005 | enum htc_endpoint_id assigned_ep = ENDPOINT_MAX; | |
2006 | unsigned int max_msg_sz = 0; | |
2007 | int status = 0; | |
2008 | ||
2009 | ath6kl_dbg(ATH6KL_DBG_TRC, | |
2010 | "htc_conn_service, target:0x%p service id:0x%X\n", | |
2011 | target, conn_req->svc_id); | |
2012 | ||
2013 | if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) { | |
2014 | /* special case for pseudo control service */ | |
2015 | assigned_ep = ENDPOINT_0; | |
2016 | max_msg_sz = HTC_MAX_CTRL_MSG_LEN; | |
2017 | } else { | |
2018 | /* allocate a packet to send to the target */ | |
2019 | tx_pkt = htc_get_control_buf(target, true); | |
2020 | ||
2021 | if (!tx_pkt) | |
2022 | return -ENOMEM; | |
2023 | ||
2024 | conn_msg = (struct htc_conn_service_msg *)tx_pkt->buf; | |
2025 | memset(conn_msg, 0, sizeof(*conn_msg)); | |
2026 | conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID); | |
2027 | conn_msg->svc_id = cpu_to_le16(conn_req->svc_id); | |
2028 | conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags); | |
2029 | ||
2030 | set_htc_pkt_info(tx_pkt, NULL, (u8 *) conn_msg, | |
2031 | sizeof(*conn_msg) + conn_msg->svc_meta_len, | |
2032 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
2033 | ||
2034 | /* we want synchronous operation */ | |
2035 | tx_pkt->completion = NULL; | |
2036 | htc_prep_send_pkt(tx_pkt, 0, 0, 0); | |
2037 | status = htc_issue_send(target, tx_pkt); | |
2038 | ||
2039 | if (status) | |
2040 | goto fail_tx; | |
2041 | ||
2042 | /* wait for response */ | |
2043 | rx_pkt = htc_wait_for_ctrl_msg(target); | |
2044 | ||
2045 | if (!rx_pkt) { | |
2046 | status = -ENOMEM; | |
2047 | goto fail_tx; | |
2048 | } | |
2049 | ||
2050 | resp_msg = (struct htc_conn_service_resp *)rx_pkt->buf; | |
2051 | ||
2052 | if ((le16_to_cpu(resp_msg->msg_id) != HTC_MSG_CONN_SVC_RESP_ID) | |
2053 | || (rx_pkt->act_len < sizeof(*resp_msg))) { | |
2054 | status = -ENOMEM; | |
2055 | goto fail_tx; | |
2056 | } | |
2057 | ||
2058 | conn_resp->resp_code = resp_msg->status; | |
2059 | /* check response status */ | |
2060 | if (resp_msg->status != HTC_SERVICE_SUCCESS) { | |
2061 | ath6kl_err("target failed service 0x%X connect request (status:%d)\n", | |
2062 | resp_msg->svc_id, resp_msg->status); | |
2063 | status = -ENOMEM; | |
2064 | goto fail_tx; | |
2065 | } | |
2066 | ||
2067 | assigned_ep = (enum htc_endpoint_id)resp_msg->eid; | |
2068 | max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz); | |
2069 | } | |
2070 | ||
2071 | if (assigned_ep >= ENDPOINT_MAX || !max_msg_sz) { | |
2072 | status = -ENOMEM; | |
2073 | goto fail_tx; | |
2074 | } | |
2075 | ||
2076 | endpoint = &target->endpoint[assigned_ep]; | |
2077 | endpoint->eid = assigned_ep; | |
2078 | if (endpoint->svc_id) { | |
2079 | status = -ENOMEM; | |
2080 | goto fail_tx; | |
2081 | } | |
2082 | ||
2083 | /* return assigned endpoint to caller */ | |
2084 | conn_resp->endpoint = assigned_ep; | |
2085 | conn_resp->len_max = max_msg_sz; | |
2086 | ||
2087 | /* setup the endpoint */ | |
2088 | ||
2089 | /* this marks the endpoint in use */ | |
2090 | endpoint->svc_id = conn_req->svc_id; | |
2091 | ||
2092 | endpoint->max_txq_depth = conn_req->max_txq_depth; | |
2093 | endpoint->len_max = max_msg_sz; | |
2094 | endpoint->ep_cb = conn_req->ep_cb; | |
2095 | endpoint->cred_dist.svc_id = conn_req->svc_id; | |
2096 | endpoint->cred_dist.htc_rsvd = endpoint; | |
2097 | endpoint->cred_dist.endpoint = assigned_ep; | |
2098 | endpoint->cred_dist.cred_sz = target->tgt_cred_sz; | |
2099 | ||
2100 | if (conn_req->max_rxmsg_sz) { | |
2101 | /* | |
2102 | * Override cred_per_msg calculation, this optimizes | |
2103 | * the credit-low indications since the host will actually | |
2104 | * issue smaller messages in the Send path. | |
2105 | */ | |
2106 | if (conn_req->max_rxmsg_sz > max_msg_sz) { | |
2107 | status = -ENOMEM; | |
2108 | goto fail_tx; | |
2109 | } | |
2110 | endpoint->cred_dist.cred_per_msg = | |
2111 | conn_req->max_rxmsg_sz / target->tgt_cred_sz; | |
2112 | } else | |
2113 | endpoint->cred_dist.cred_per_msg = | |
2114 | max_msg_sz / target->tgt_cred_sz; | |
2115 | ||
2116 | if (!endpoint->cred_dist.cred_per_msg) | |
2117 | endpoint->cred_dist.cred_per_msg = 1; | |
2118 | ||
2119 | /* save local connection flags */ | |
2120 | endpoint->conn_flags = conn_req->flags; | |
2121 | ||
2122 | fail_tx: | |
2123 | if (tx_pkt) | |
2124 | htc_reclaim_txctrl_buf(target, tx_pkt); | |
2125 | ||
2126 | if (rx_pkt) { | |
2127 | htc_rxpkt_reset(rx_pkt); | |
2128 | reclaim_rx_ctrl_buf(target, rx_pkt); | |
2129 | } | |
2130 | ||
2131 | return status; | |
2132 | } | |
2133 | ||
2134 | static void reset_ep_state(struct htc_target *target) | |
2135 | { | |
2136 | struct htc_endpoint *endpoint; | |
2137 | int i; | |
2138 | ||
2139 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
2140 | endpoint = &target->endpoint[i]; | |
2141 | memset(&endpoint->cred_dist, 0, sizeof(endpoint->cred_dist)); | |
2142 | endpoint->svc_id = 0; | |
2143 | endpoint->len_max = 0; | |
2144 | endpoint->max_txq_depth = 0; | |
2145 | memset(&endpoint->ep_st, 0, | |
2146 | sizeof(endpoint->ep_st)); | |
2147 | INIT_LIST_HEAD(&endpoint->rx_bufq); | |
2148 | INIT_LIST_HEAD(&endpoint->txq); | |
2149 | endpoint->target = target; | |
2150 | } | |
2151 | ||
2152 | /* reset distribution list */ | |
2153 | INIT_LIST_HEAD(&target->cred_dist_list); | |
2154 | } | |
2155 | ||
2156 | int htc_get_rxbuf_num(struct htc_target *target, enum htc_endpoint_id endpoint) | |
2157 | { | |
2158 | int num; | |
2159 | ||
2160 | spin_lock_bh(&target->rx_lock); | |
2161 | num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq)); | |
2162 | spin_unlock_bh(&target->rx_lock); | |
2163 | return num; | |
2164 | } | |
2165 | ||
2166 | static void htc_setup_msg_bndl(struct htc_target *target) | |
2167 | { | |
bdcd8170 KV |
2168 | /* limit what HTC can handle */ |
2169 | target->msg_per_bndl_max = min(HTC_HOST_MAX_MSG_PER_BUNDLE, | |
2170 | target->msg_per_bndl_max); | |
2171 | ||
50745af7 | 2172 | if (ath6kl_hif_enable_scatter(target->dev->ar)) { |
bdcd8170 KV |
2173 | target->msg_per_bndl_max = 0; |
2174 | return; | |
2175 | } | |
2176 | ||
2177 | /* limit bundle what the device layer can handle */ | |
50745af7 | 2178 | target->msg_per_bndl_max = min(target->max_scat_entries, |
bdcd8170 KV |
2179 | target->msg_per_bndl_max); |
2180 | ||
2181 | ath6kl_dbg(ATH6KL_DBG_TRC, | |
2182 | "htc bundling allowed. max msg per htc bundle: %d\n", | |
2183 | target->msg_per_bndl_max); | |
2184 | ||
2185 | /* Max rx bundle size is limited by the max tx bundle size */ | |
50745af7 | 2186 | target->max_rx_bndl_sz = target->max_xfer_szper_scatreq; |
bdcd8170 | 2187 | /* Max tx bundle size if limited by the extended mbox address range */ |
3b2f5e51 | 2188 | target->max_tx_bndl_sz = min(HIF_MBOX0_EXT_WIDTH, |
50745af7 | 2189 | target->max_xfer_szper_scatreq); |
bdcd8170 KV |
2190 | |
2191 | ath6kl_dbg(ATH6KL_DBG_ANY, "max recv: %d max send: %d\n", | |
3b2f5e51 | 2192 | target->max_rx_bndl_sz, target->max_tx_bndl_sz); |
bdcd8170 | 2193 | |
3b2f5e51 | 2194 | if (target->max_tx_bndl_sz) |
bdcd8170 KV |
2195 | target->tx_bndl_enable = true; |
2196 | ||
3b2f5e51 | 2197 | if (target->max_rx_bndl_sz) |
bdcd8170 KV |
2198 | target->rx_bndl_enable = true; |
2199 | ||
5be8824f | 2200 | if ((target->tgt_cred_sz % target->block_sz) != 0) { |
bdcd8170 KV |
2201 | ath6kl_warn("credit size: %d is not block aligned! Disabling send bundling\n", |
2202 | target->tgt_cred_sz); | |
2203 | ||
2204 | /* | |
2205 | * Disallow send bundling since the credit size is | |
2206 | * not aligned to a block size the I/O block | |
2207 | * padding will spill into the next credit buffer | |
2208 | * which is fatal. | |
2209 | */ | |
2210 | target->tx_bndl_enable = false; | |
2211 | } | |
2212 | } | |
2213 | ||
2214 | int htc_wait_target(struct htc_target *target) | |
2215 | { | |
2216 | struct htc_packet *packet = NULL; | |
2217 | struct htc_ready_ext_msg *rdy_msg; | |
2218 | struct htc_service_connect_req connect; | |
2219 | struct htc_service_connect_resp resp; | |
2220 | int status; | |
2221 | ||
2222 | /* we should be getting 1 control message that the target is ready */ | |
2223 | packet = htc_wait_for_ctrl_msg(target); | |
2224 | ||
2225 | if (!packet) | |
2226 | return -ENOMEM; | |
2227 | ||
2228 | /* we controlled the buffer creation so it's properly aligned */ | |
2229 | rdy_msg = (struct htc_ready_ext_msg *)packet->buf; | |
2230 | ||
2231 | if ((le16_to_cpu(rdy_msg->ver2_0_info.msg_id) != HTC_MSG_READY_ID) || | |
2232 | (packet->act_len < sizeof(struct htc_ready_msg))) { | |
2233 | status = -ENOMEM; | |
2234 | goto fail_wait_target; | |
2235 | } | |
2236 | ||
2237 | if (!rdy_msg->ver2_0_info.cred_cnt || !rdy_msg->ver2_0_info.cred_sz) { | |
2238 | status = -ENOMEM; | |
2239 | goto fail_wait_target; | |
2240 | } | |
2241 | ||
2242 | target->tgt_creds = le16_to_cpu(rdy_msg->ver2_0_info.cred_cnt); | |
2243 | target->tgt_cred_sz = le16_to_cpu(rdy_msg->ver2_0_info.cred_sz); | |
2244 | ||
2245 | ath6kl_dbg(ATH6KL_DBG_HTC_RECV, | |
2246 | "target ready: credits: %d credit size: %d\n", | |
2247 | target->tgt_creds, target->tgt_cred_sz); | |
2248 | ||
2249 | /* check if this is an extended ready message */ | |
2250 | if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) { | |
2251 | /* this is an extended message */ | |
2252 | target->htc_tgt_ver = rdy_msg->htc_ver; | |
2253 | target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl; | |
2254 | } else { | |
2255 | /* legacy */ | |
2256 | target->htc_tgt_ver = HTC_VERSION_2P0; | |
2257 | target->msg_per_bndl_max = 0; | |
2258 | } | |
2259 | ||
2260 | ath6kl_dbg(ATH6KL_DBG_TRC, "using htc protocol version : %s (%d)\n", | |
2261 | (target->htc_tgt_ver == HTC_VERSION_2P0) ? "2.0" : ">= 2.1", | |
2262 | target->htc_tgt_ver); | |
2263 | ||
2264 | if (target->msg_per_bndl_max > 0) | |
2265 | htc_setup_msg_bndl(target); | |
2266 | ||
2267 | /* setup our pseudo HTC control endpoint connection */ | |
2268 | memset(&connect, 0, sizeof(connect)); | |
2269 | memset(&resp, 0, sizeof(resp)); | |
2270 | connect.ep_cb.rx = htc_ctrl_rx; | |
2271 | connect.ep_cb.rx_refill = NULL; | |
2272 | connect.ep_cb.tx_full = NULL; | |
2273 | connect.max_txq_depth = NUM_CONTROL_BUFFERS; | |
2274 | connect.svc_id = HTC_CTRL_RSVD_SVC; | |
2275 | ||
2276 | /* connect fake service */ | |
2277 | status = htc_conn_service((void *)target, &connect, &resp); | |
2278 | ||
2279 | if (status) | |
2280 | ath6kl_hif_cleanup_scatter(target->dev->ar); | |
2281 | ||
2282 | fail_wait_target: | |
2283 | if (packet) { | |
2284 | htc_rxpkt_reset(packet); | |
2285 | reclaim_rx_ctrl_buf(target, packet); | |
2286 | } | |
2287 | ||
2288 | return status; | |
2289 | } | |
2290 | ||
2291 | /* | |
2292 | * Start HTC, enable interrupts and let the target know | |
2293 | * host has finished setup. | |
2294 | */ | |
2295 | int htc_start(struct htc_target *target) | |
2296 | { | |
2297 | struct htc_packet *packet; | |
2298 | int status; | |
2299 | ||
2300 | /* Disable interrupts at the chip level */ | |
2301 | ath6kldev_disable_intrs(target->dev); | |
2302 | ||
2303 | target->htc_flags = 0; | |
2304 | target->rx_st_flags = 0; | |
2305 | ||
2306 | /* Push control receive buffers into htc control endpoint */ | |
2307 | while ((packet = htc_get_control_buf(target, false)) != NULL) { | |
2308 | status = htc_add_rxbuf(target, packet); | |
2309 | if (status) | |
2310 | return status; | |
2311 | } | |
2312 | ||
2313 | /* NOTE: the first entry in the distribution list is ENDPOINT_0 */ | |
2314 | ath6k_credit_init(target->cred_dist_cntxt, &target->cred_dist_list, | |
2315 | target->tgt_creds); | |
2316 | ||
2317 | dump_cred_dist_stats(target); | |
2318 | ||
2319 | /* Indicate to the target of the setup completion */ | |
2320 | status = htc_setup_tx_complete(target); | |
2321 | ||
2322 | if (status) | |
2323 | return status; | |
2324 | ||
2325 | /* unmask interrupts */ | |
2326 | status = ath6kldev_unmask_intrs(target->dev); | |
2327 | ||
2328 | if (status) | |
2329 | htc_stop(target); | |
2330 | ||
2331 | return status; | |
2332 | } | |
2333 | ||
2334 | /* htc_stop: stop interrupt reception, and flush all queued buffers */ | |
2335 | void htc_stop(struct htc_target *target) | |
2336 | { | |
2337 | spin_lock_bh(&target->htc_lock); | |
2338 | target->htc_flags |= HTC_OP_STATE_STOPPING; | |
2339 | spin_unlock_bh(&target->htc_lock); | |
2340 | ||
2341 | /* | |
2342 | * Masking interrupts is a synchronous operation, when this | |
2343 | * function returns all pending HIF I/O has completed, we can | |
2344 | * safely flush the queues. | |
2345 | */ | |
2346 | ath6kldev_mask_intrs(target->dev); | |
2347 | ||
2348 | htc_flush_txep_all(target); | |
2349 | ||
2350 | htc_flush_rx_buf(target); | |
2351 | ||
2352 | reset_ep_state(target); | |
2353 | } | |
2354 | ||
2355 | void *htc_create(struct ath6kl *ar) | |
2356 | { | |
2357 | struct htc_target *target = NULL; | |
2358 | struct htc_packet *packet; | |
2359 | int status = 0, i = 0; | |
2360 | u32 block_size, ctrl_bufsz; | |
2361 | ||
2362 | target = kzalloc(sizeof(*target), GFP_KERNEL); | |
2363 | if (!target) { | |
2364 | ath6kl_err("unable to allocate memory\n"); | |
2365 | return NULL; | |
2366 | } | |
2367 | ||
2368 | target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); | |
2369 | if (!target->dev) { | |
2370 | ath6kl_err("unable to allocate memory\n"); | |
2371 | status = -ENOMEM; | |
2372 | goto fail_create_htc; | |
2373 | } | |
2374 | ||
2375 | spin_lock_init(&target->htc_lock); | |
2376 | spin_lock_init(&target->rx_lock); | |
2377 | spin_lock_init(&target->tx_lock); | |
2378 | ||
2379 | INIT_LIST_HEAD(&target->free_ctrl_txbuf); | |
2380 | INIT_LIST_HEAD(&target->free_ctrl_rxbuf); | |
2381 | INIT_LIST_HEAD(&target->cred_dist_list); | |
2382 | ||
2383 | target->dev->ar = ar; | |
2384 | target->dev->htc_cnxt = target; | |
bdcd8170 KV |
2385 | target->ep_waiting = ENDPOINT_MAX; |
2386 | ||
2387 | reset_ep_state(target); | |
2388 | ||
2389 | status = ath6kldev_setup(target->dev); | |
2390 | ||
2391 | if (status) | |
2392 | goto fail_create_htc; | |
2393 | ||
2394 | block_size = ar->mbox_info.block_size; | |
2395 | ||
2396 | ctrl_bufsz = (block_size > HTC_MAX_CTRL_MSG_LEN) ? | |
2397 | (block_size + HTC_HDR_LENGTH) : | |
2398 | (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH); | |
2399 | ||
2400 | for (i = 0; i < NUM_CONTROL_BUFFERS; i++) { | |
2401 | packet = kzalloc(sizeof(*packet), GFP_KERNEL); | |
2402 | if (!packet) | |
2403 | break; | |
2404 | ||
2405 | packet->buf_start = kzalloc(ctrl_bufsz, GFP_KERNEL); | |
2406 | if (!packet->buf_start) { | |
2407 | kfree(packet); | |
2408 | break; | |
2409 | } | |
2410 | ||
2411 | packet->buf_len = ctrl_bufsz; | |
2412 | if (i < NUM_CONTROL_RX_BUFFERS) { | |
2413 | packet->act_len = 0; | |
2414 | packet->buf = packet->buf_start; | |
2415 | packet->endpoint = ENDPOINT_0; | |
2416 | list_add_tail(&packet->list, &target->free_ctrl_rxbuf); | |
2417 | } else | |
2418 | list_add_tail(&packet->list, &target->free_ctrl_txbuf); | |
2419 | } | |
2420 | ||
2421 | fail_create_htc: | |
2422 | if (i != NUM_CONTROL_BUFFERS || status) { | |
2423 | if (target) { | |
2424 | htc_cleanup(target); | |
2425 | target = NULL; | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | return target; | |
2430 | } | |
2431 | ||
2432 | /* cleanup the HTC instance */ | |
2433 | void htc_cleanup(struct htc_target *target) | |
2434 | { | |
2435 | struct htc_packet *packet, *tmp_packet; | |
2436 | ||
2437 | ath6kl_hif_cleanup_scatter(target->dev->ar); | |
2438 | ||
2439 | list_for_each_entry_safe(packet, tmp_packet, | |
2440 | &target->free_ctrl_txbuf, list) { | |
2441 | list_del(&packet->list); | |
2442 | kfree(packet->buf_start); | |
2443 | kfree(packet); | |
2444 | } | |
2445 | ||
2446 | list_for_each_entry_safe(packet, tmp_packet, | |
2447 | &target->free_ctrl_rxbuf, list) { | |
2448 | list_del(&packet->list); | |
2449 | kfree(packet->buf_start); | |
2450 | kfree(packet); | |
2451 | } | |
2452 | ||
2453 | kfree(target->dev); | |
2454 | kfree(target); | |
2455 | } |