]>
Commit | Line | Data |
---|---|---|
636f8288 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 "debug.h" | |
19 | #include "hif-ops.h" | |
20 | ||
21 | #define HTC_PACKET_CONTAINER_ALLOCATION 32 | |
22 | #define HTC_CONTROL_BUFFER_SIZE (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH) | |
23 | ||
24 | static int ath6kl_htc_pipe_tx(struct htc_target *handle, | |
25 | struct htc_packet *packet); | |
26 | static void ath6kl_htc_pipe_cleanup(struct htc_target *handle); | |
27 | ||
28 | /* htc pipe tx path */ | |
29 | static inline void restore_tx_packet(struct htc_packet *packet) | |
30 | { | |
31 | if (packet->info.tx.flags & HTC_FLAGS_TX_FIXUP_NETBUF) { | |
32 | skb_pull(packet->skb, sizeof(struct htc_frame_hdr)); | |
33 | packet->info.tx.flags &= ~HTC_FLAGS_TX_FIXUP_NETBUF; | |
34 | } | |
35 | } | |
36 | ||
37 | static void do_send_completion(struct htc_endpoint *ep, | |
38 | struct list_head *queue_to_indicate) | |
39 | { | |
40 | struct htc_packet *packet; | |
41 | ||
42 | if (list_empty(queue_to_indicate)) { | |
43 | /* nothing to indicate */ | |
44 | return; | |
45 | } | |
46 | ||
47 | if (ep->ep_cb.tx_comp_multi != NULL) { | |
48 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
49 | "%s: calling ep %d, send complete multiple callback (%d pkts)\n", | |
50 | __func__, ep->eid, | |
51 | get_queue_depth(queue_to_indicate)); | |
52 | /* | |
53 | * a multiple send complete handler is being used, | |
54 | * pass the queue to the handler | |
55 | */ | |
56 | ep->ep_cb.tx_comp_multi(ep->target, queue_to_indicate); | |
57 | /* | |
58 | * all packets are now owned by the callback, | |
59 | * reset queue to be safe | |
60 | */ | |
61 | INIT_LIST_HEAD(queue_to_indicate); | |
62 | } else { | |
63 | /* using legacy EpTxComplete */ | |
64 | do { | |
65 | packet = list_first_entry(queue_to_indicate, | |
66 | struct htc_packet, list); | |
67 | ||
68 | list_del(&packet->list); | |
69 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
70 | "%s: calling ep %d send complete callback on packet 0x%p\n", | |
71 | __func__, ep->eid, packet); | |
72 | ep->ep_cb.tx_complete(ep->target, packet); | |
73 | } while (!list_empty(queue_to_indicate)); | |
74 | } | |
75 | } | |
76 | ||
77 | static void send_packet_completion(struct htc_target *target, | |
78 | struct htc_packet *packet) | |
79 | { | |
80 | struct htc_endpoint *ep = &target->endpoint[packet->endpoint]; | |
81 | struct list_head container; | |
82 | ||
83 | restore_tx_packet(packet); | |
84 | INIT_LIST_HEAD(&container); | |
85 | list_add_tail(&packet->list, &container); | |
86 | ||
87 | /* do completion */ | |
88 | do_send_completion(ep, &container); | |
89 | } | |
90 | ||
91 | static void get_htc_packet_credit_based(struct htc_target *target, | |
92 | struct htc_endpoint *ep, | |
93 | struct list_head *queue) | |
94 | { | |
95 | int credits_required; | |
96 | int remainder; | |
97 | u8 send_flags; | |
98 | struct htc_packet *packet; | |
99 | unsigned int transfer_len; | |
100 | ||
101 | /* NOTE : the TX lock is held when this function is called */ | |
102 | ||
103 | /* loop until we can grab as many packets out of the queue as we can */ | |
104 | while (true) { | |
105 | send_flags = 0; | |
106 | if (list_empty(&ep->txq)) | |
107 | break; | |
108 | ||
109 | /* get packet at head, but don't remove it */ | |
110 | packet = list_first_entry(&ep->txq, struct htc_packet, list); | |
636f8288 KV |
111 | |
112 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
113 | "%s: got head packet:0x%p , queue depth: %d\n", | |
114 | __func__, packet, get_queue_depth(&ep->txq)); | |
115 | ||
116 | transfer_len = packet->act_len + HTC_HDR_LENGTH; | |
117 | ||
118 | if (transfer_len <= target->tgt_cred_sz) { | |
119 | credits_required = 1; | |
120 | } else { | |
121 | /* figure out how many credits this message requires */ | |
122 | credits_required = transfer_len / target->tgt_cred_sz; | |
123 | remainder = transfer_len % target->tgt_cred_sz; | |
124 | ||
125 | if (remainder) | |
126 | credits_required++; | |
127 | } | |
128 | ||
129 | ath6kl_dbg(ATH6KL_DBG_HTC, "%s: creds required:%d got:%d\n", | |
130 | __func__, credits_required, ep->cred_dist.credits); | |
131 | ||
132 | if (ep->eid == ENDPOINT_0) { | |
133 | /* | |
134 | * endpoint 0 is special, it always has a credit and | |
135 | * does not require credit based flow control | |
136 | */ | |
137 | credits_required = 0; | |
138 | ||
139 | } else { | |
140 | ||
141 | if (ep->cred_dist.credits < credits_required) | |
142 | break; | |
143 | ||
144 | ep->cred_dist.credits -= credits_required; | |
145 | ep->ep_st.cred_cosumd += credits_required; | |
146 | ||
147 | /* check if we need credits back from the target */ | |
148 | if (ep->cred_dist.credits < | |
149 | ep->cred_dist.cred_per_msg) { | |
150 | /* tell the target we need credits ASAP! */ | |
151 | send_flags |= HTC_FLAGS_NEED_CREDIT_UPDATE; | |
152 | ep->ep_st.cred_low_indicate += 1; | |
153 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
154 | "%s: host needs credits\n", | |
155 | __func__); | |
156 | } | |
157 | } | |
158 | ||
159 | /* now we can fully dequeue */ | |
160 | packet = list_first_entry(&ep->txq, struct htc_packet, list); | |
161 | ||
162 | list_del(&packet->list); | |
163 | /* save the number of credits this packet consumed */ | |
164 | packet->info.tx.cred_used = credits_required; | |
165 | /* save send flags */ | |
166 | packet->info.tx.flags = send_flags; | |
167 | packet->info.tx.seqno = ep->seqno; | |
168 | ep->seqno++; | |
169 | /* queue this packet into the caller's queue */ | |
170 | list_add_tail(&packet->list, queue); | |
171 | } | |
172 | ||
173 | } | |
174 | ||
175 | static void get_htc_packet(struct htc_target *target, | |
176 | struct htc_endpoint *ep, | |
177 | struct list_head *queue, int resources) | |
178 | { | |
179 | struct htc_packet *packet; | |
180 | ||
181 | /* NOTE : the TX lock is held when this function is called */ | |
182 | ||
183 | /* loop until we can grab as many packets out of the queue as we can */ | |
184 | while (resources) { | |
185 | if (list_empty(&ep->txq)) | |
186 | break; | |
187 | ||
188 | packet = list_first_entry(&ep->txq, struct htc_packet, list); | |
189 | list_del(&packet->list); | |
190 | ||
191 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
192 | "%s: got packet:0x%p , new queue depth: %d\n", | |
193 | __func__, packet, get_queue_depth(&ep->txq)); | |
194 | packet->info.tx.seqno = ep->seqno; | |
195 | packet->info.tx.flags = 0; | |
196 | packet->info.tx.cred_used = 0; | |
197 | ep->seqno++; | |
198 | ||
199 | /* queue this packet into the caller's queue */ | |
200 | list_add_tail(&packet->list, queue); | |
201 | resources--; | |
202 | } | |
203 | } | |
204 | ||
205 | static int htc_issue_packets(struct htc_target *target, | |
206 | struct htc_endpoint *ep, | |
207 | struct list_head *pkt_queue) | |
208 | { | |
209 | int status = 0; | |
210 | u16 payload_len; | |
211 | struct sk_buff *skb; | |
212 | struct htc_frame_hdr *htc_hdr; | |
213 | struct htc_packet *packet; | |
214 | ||
215 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
216 | "%s: queue: 0x%p, pkts %d\n", __func__, | |
217 | pkt_queue, get_queue_depth(pkt_queue)); | |
218 | ||
219 | while (!list_empty(pkt_queue)) { | |
220 | packet = list_first_entry(pkt_queue, struct htc_packet, list); | |
221 | list_del(&packet->list); | |
222 | ||
223 | skb = packet->skb; | |
224 | if (!skb) { | |
225 | WARN_ON_ONCE(1); | |
226 | status = -EINVAL; | |
227 | break; | |
228 | } | |
229 | ||
230 | payload_len = packet->act_len; | |
231 | ||
232 | /* setup HTC frame header */ | |
233 | htc_hdr = (struct htc_frame_hdr *) skb_push(skb, | |
234 | sizeof(*htc_hdr)); | |
235 | if (!htc_hdr) { | |
236 | WARN_ON_ONCE(1); | |
237 | status = -EINVAL; | |
238 | break; | |
239 | } | |
240 | ||
241 | packet->info.tx.flags |= HTC_FLAGS_TX_FIXUP_NETBUF; | |
242 | ||
243 | /* Endianess? */ | |
244 | put_unaligned((u16) payload_len, &htc_hdr->payld_len); | |
245 | htc_hdr->flags = packet->info.tx.flags; | |
246 | htc_hdr->eid = (u8) packet->endpoint; | |
247 | htc_hdr->ctrl[0] = 0; | |
248 | htc_hdr->ctrl[1] = (u8) packet->info.tx.seqno; | |
249 | ||
250 | spin_lock_bh(&target->tx_lock); | |
251 | ||
252 | /* store in look up queue to match completions */ | |
253 | list_add_tail(&packet->list, &ep->pipe.tx_lookup_queue); | |
254 | ep->ep_st.tx_issued += 1; | |
255 | spin_unlock_bh(&target->tx_lock); | |
256 | ||
257 | status = ath6kl_hif_pipe_send(target->dev->ar, | |
258 | ep->pipe.pipeid_ul, NULL, skb); | |
259 | ||
260 | if (status != 0) { | |
261 | if (status != -ENOMEM) { | |
262 | /* TODO: if more than 1 endpoint maps to the | |
263 | * same PipeID, it is possible to run out of | |
264 | * resources in the HIF layer. | |
265 | * Don't emit the error | |
266 | */ | |
267 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
268 | "%s: failed status:%d\n", | |
269 | __func__, status); | |
270 | } | |
271 | spin_lock_bh(&target->tx_lock); | |
272 | list_del(&packet->list); | |
273 | ||
274 | /* reclaim credits */ | |
275 | ep->cred_dist.credits += packet->info.tx.cred_used; | |
276 | spin_unlock_bh(&target->tx_lock); | |
277 | ||
278 | /* put it back into the callers queue */ | |
279 | list_add(&packet->list, pkt_queue); | |
280 | break; | |
281 | } | |
282 | ||
283 | } | |
284 | ||
285 | if (status != 0) { | |
286 | while (!list_empty(pkt_queue)) { | |
287 | if (status != -ENOMEM) { | |
288 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
289 | "%s: failed pkt:0x%p status:%d\n", | |
290 | __func__, packet, status); | |
291 | } | |
292 | ||
293 | packet = list_first_entry(pkt_queue, | |
294 | struct htc_packet, list); | |
295 | list_del(&packet->list); | |
296 | packet->status = status; | |
297 | send_packet_completion(target, packet); | |
298 | } | |
299 | } | |
300 | ||
301 | return status; | |
302 | } | |
303 | ||
304 | static enum htc_send_queue_result htc_try_send(struct htc_target *target, | |
305 | struct htc_endpoint *ep, | |
306 | struct list_head *txq) | |
307 | { | |
308 | struct list_head send_queue; /* temp queue to hold packets */ | |
309 | struct htc_packet *packet, *tmp_pkt; | |
310 | struct ath6kl *ar = target->dev->ar; | |
311 | enum htc_send_full_action action; | |
312 | int tx_resources, overflow, txqueue_depth, i, good_pkts; | |
313 | u8 pipeid; | |
314 | ||
315 | ath6kl_dbg(ATH6KL_DBG_HTC, "%s: (queue:0x%p depth:%d)\n", | |
316 | __func__, txq, | |
317 | (txq == NULL) ? 0 : get_queue_depth(txq)); | |
318 | ||
319 | /* init the local send queue */ | |
320 | INIT_LIST_HEAD(&send_queue); | |
321 | ||
322 | /* | |
323 | * txq equals to NULL means | |
324 | * caller didn't provide a queue, just wants us to | |
325 | * check queues and send | |
326 | */ | |
327 | if (txq != NULL) { | |
328 | if (list_empty(txq)) { | |
329 | /* empty queue */ | |
330 | return HTC_SEND_QUEUE_DROP; | |
331 | } | |
332 | ||
333 | spin_lock_bh(&target->tx_lock); | |
334 | txqueue_depth = get_queue_depth(&ep->txq); | |
335 | spin_unlock_bh(&target->tx_lock); | |
336 | ||
337 | if (txqueue_depth >= ep->max_txq_depth) { | |
338 | /* we've already overflowed */ | |
339 | overflow = get_queue_depth(txq); | |
340 | } else { | |
341 | /* get how much we will overflow by */ | |
342 | overflow = txqueue_depth; | |
343 | overflow += get_queue_depth(txq); | |
344 | /* get how much we will overflow the TX queue by */ | |
345 | overflow -= ep->max_txq_depth; | |
346 | } | |
347 | ||
348 | /* if overflow is negative or zero, we are okay */ | |
349 | if (overflow > 0) { | |
350 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
351 | "%s: Endpoint %d, TX queue will overflow :%d, Tx Depth:%d, Max:%d\n", | |
352 | __func__, ep->eid, overflow, txqueue_depth, | |
353 | ep->max_txq_depth); | |
354 | } | |
355 | if ((overflow <= 0) || | |
356 | (ep->ep_cb.tx_full == NULL)) { | |
357 | /* | |
358 | * all packets will fit or caller did not provide send | |
359 | * full indication handler -- just move all of them | |
360 | * to the local send_queue object | |
361 | */ | |
362 | list_splice_tail_init(txq, &send_queue); | |
363 | } else { | |
364 | good_pkts = get_queue_depth(txq) - overflow; | |
365 | if (good_pkts < 0) { | |
366 | WARN_ON_ONCE(1); | |
367 | return HTC_SEND_QUEUE_DROP; | |
368 | } | |
369 | ||
370 | /* we have overflowed, and a callback is provided */ | |
371 | /* dequeue all non-overflow packets to the sendqueue */ | |
372 | for (i = 0; i < good_pkts; i++) { | |
373 | /* pop off caller's queue */ | |
374 | packet = list_first_entry(txq, | |
375 | struct htc_packet, | |
376 | list); | |
f08dbda2 WY |
377 | /* move to local queue */ |
378 | list_move_tail(&packet->list, &send_queue); | |
636f8288 KV |
379 | } |
380 | ||
381 | /* | |
382 | * the caller's queue has all the packets that won't fit | |
383 | * walk through the caller's queue and indicate each to | |
384 | * the send full handler | |
385 | */ | |
386 | list_for_each_entry_safe(packet, tmp_pkt, | |
387 | txq, list) { | |
388 | ||
389 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
390 | "%s: Indicat overflowed TX pkts: %p\n", | |
391 | __func__, packet); | |
392 | action = ep->ep_cb.tx_full(ep->target, packet); | |
393 | if (action == HTC_SEND_FULL_DROP) { | |
394 | /* callback wants the packet dropped */ | |
395 | ep->ep_st.tx_dropped += 1; | |
396 | ||
397 | /* leave this one in the caller's queue | |
398 | * for cleanup */ | |
399 | } else { | |
400 | /* callback wants to keep this packet, | |
f08dbda2 WY |
401 | * move from caller's queue to the send |
402 | * queue */ | |
403 | list_move_tail(&packet->list, | |
404 | &send_queue); | |
636f8288 KV |
405 | } |
406 | ||
407 | } | |
408 | ||
409 | if (list_empty(&send_queue)) { | |
410 | /* no packets made it in, caller will cleanup */ | |
411 | return HTC_SEND_QUEUE_DROP; | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | if (!ep->pipe.tx_credit_flow_enabled) { | |
417 | tx_resources = | |
418 | ath6kl_hif_pipe_get_free_queue_number(ar, | |
419 | ep->pipe.pipeid_ul); | |
420 | } else { | |
421 | tx_resources = 0; | |
422 | } | |
423 | ||
424 | spin_lock_bh(&target->tx_lock); | |
425 | if (!list_empty(&send_queue)) { | |
426 | /* transfer packets to tail */ | |
427 | list_splice_tail_init(&send_queue, &ep->txq); | |
428 | if (!list_empty(&send_queue)) { | |
429 | WARN_ON_ONCE(1); | |
430 | spin_unlock_bh(&target->tx_lock); | |
431 | return HTC_SEND_QUEUE_DROP; | |
432 | } | |
433 | INIT_LIST_HEAD(&send_queue); | |
434 | } | |
435 | ||
436 | /* increment tx processing count on entry */ | |
437 | ep->tx_proc_cnt++; | |
438 | ||
439 | if (ep->tx_proc_cnt > 1) { | |
440 | /* | |
441 | * Another thread or task is draining the TX queues on this | |
442 | * endpoint that thread will reset the tx processing count | |
443 | * when the queue is drained. | |
444 | */ | |
445 | ep->tx_proc_cnt--; | |
446 | spin_unlock_bh(&target->tx_lock); | |
447 | return HTC_SEND_QUEUE_OK; | |
448 | } | |
449 | ||
450 | /***** beyond this point only 1 thread may enter ******/ | |
451 | ||
452 | /* | |
453 | * Now drain the endpoint TX queue for transmission as long as we have | |
454 | * enough transmit resources. | |
455 | */ | |
456 | while (true) { | |
457 | ||
458 | if (get_queue_depth(&ep->txq) == 0) | |
459 | break; | |
460 | ||
461 | if (ep->pipe.tx_credit_flow_enabled) { | |
462 | /* | |
463 | * Credit based mechanism provides flow control | |
464 | * based on target transmit resource availability, | |
465 | * we assume that the HIF layer will always have | |
466 | * bus resources greater than target transmit | |
467 | * resources. | |
468 | */ | |
469 | get_htc_packet_credit_based(target, ep, &send_queue); | |
470 | } else { | |
471 | /* | |
472 | * Get all packets for this endpoint that we can | |
473 | * for this pass. | |
474 | */ | |
475 | get_htc_packet(target, ep, &send_queue, tx_resources); | |
476 | } | |
477 | ||
478 | if (get_queue_depth(&send_queue) == 0) { | |
479 | /* | |
480 | * Didn't get packets due to out of resources or TX | |
481 | * queue was drained. | |
482 | */ | |
483 | break; | |
484 | } | |
485 | ||
486 | spin_unlock_bh(&target->tx_lock); | |
487 | ||
488 | /* send what we can */ | |
489 | htc_issue_packets(target, ep, &send_queue); | |
490 | ||
491 | if (!ep->pipe.tx_credit_flow_enabled) { | |
492 | pipeid = ep->pipe.pipeid_ul; | |
493 | tx_resources = | |
494 | ath6kl_hif_pipe_get_free_queue_number(ar, pipeid); | |
495 | } | |
496 | ||
497 | spin_lock_bh(&target->tx_lock); | |
498 | ||
499 | } | |
500 | /* done with this endpoint, we can clear the count */ | |
501 | ep->tx_proc_cnt = 0; | |
502 | spin_unlock_bh(&target->tx_lock); | |
503 | ||
504 | return HTC_SEND_QUEUE_OK; | |
505 | } | |
506 | ||
507 | /* htc control packet manipulation */ | |
508 | static void destroy_htc_txctrl_packet(struct htc_packet *packet) | |
509 | { | |
510 | struct sk_buff *skb; | |
511 | skb = packet->skb; | |
e16ccfee | 512 | dev_kfree_skb(skb); |
636f8288 KV |
513 | kfree(packet); |
514 | } | |
515 | ||
516 | static struct htc_packet *build_htc_txctrl_packet(void) | |
517 | { | |
518 | struct htc_packet *packet = NULL; | |
519 | struct sk_buff *skb; | |
520 | ||
521 | packet = kzalloc(sizeof(struct htc_packet), GFP_KERNEL); | |
522 | if (packet == NULL) | |
523 | return NULL; | |
524 | ||
525 | skb = __dev_alloc_skb(HTC_CONTROL_BUFFER_SIZE, GFP_KERNEL); | |
526 | ||
527 | if (skb == NULL) { | |
528 | kfree(packet); | |
529 | return NULL; | |
530 | } | |
531 | packet->skb = skb; | |
532 | ||
533 | return packet; | |
534 | } | |
535 | ||
536 | static void htc_free_txctrl_packet(struct htc_target *target, | |
537 | struct htc_packet *packet) | |
538 | { | |
539 | destroy_htc_txctrl_packet(packet); | |
540 | } | |
541 | ||
542 | static struct htc_packet *htc_alloc_txctrl_packet(struct htc_target *target) | |
543 | { | |
544 | return build_htc_txctrl_packet(); | |
545 | } | |
546 | ||
547 | static void htc_txctrl_complete(struct htc_target *target, | |
548 | struct htc_packet *packet) | |
549 | { | |
550 | htc_free_txctrl_packet(target, packet); | |
551 | } | |
552 | ||
553 | #define MAX_MESSAGE_SIZE 1536 | |
554 | ||
555 | static int htc_setup_target_buffer_assignments(struct htc_target *target) | |
556 | { | |
557 | int status, credits, credit_per_maxmsg, i; | |
558 | struct htc_pipe_txcredit_alloc *entry; | |
559 | unsigned int hif_usbaudioclass = 0; | |
560 | ||
561 | credit_per_maxmsg = MAX_MESSAGE_SIZE / target->tgt_cred_sz; | |
562 | if (MAX_MESSAGE_SIZE % target->tgt_cred_sz) | |
563 | credit_per_maxmsg++; | |
564 | ||
565 | /* TODO, this should be configured by the caller! */ | |
566 | ||
567 | credits = target->tgt_creds; | |
568 | entry = &target->pipe.txcredit_alloc[0]; | |
569 | ||
570 | status = -ENOMEM; | |
571 | ||
572 | /* FIXME: hif_usbaudioclass is always zero */ | |
573 | if (hif_usbaudioclass) { | |
574 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
575 | "%s: For USB Audio Class- Total:%d\n", | |
576 | __func__, credits); | |
577 | entry++; | |
578 | entry++; | |
579 | /* Setup VO Service To have Max Credits */ | |
580 | entry->service_id = WMI_DATA_VO_SVC; | |
581 | entry->credit_alloc = (credits - 6); | |
582 | if (entry->credit_alloc == 0) | |
583 | entry->credit_alloc++; | |
584 | ||
585 | credits -= (int) entry->credit_alloc; | |
586 | if (credits <= 0) | |
587 | return status; | |
588 | ||
589 | entry++; | |
590 | entry->service_id = WMI_CONTROL_SVC; | |
591 | entry->credit_alloc = credit_per_maxmsg; | |
592 | credits -= (int) entry->credit_alloc; | |
593 | if (credits <= 0) | |
594 | return status; | |
595 | ||
596 | /* leftovers go to best effort */ | |
597 | entry++; | |
598 | entry++; | |
599 | entry->service_id = WMI_DATA_BE_SVC; | |
600 | entry->credit_alloc = (u8) credits; | |
601 | status = 0; | |
602 | } else { | |
603 | entry++; | |
604 | entry->service_id = WMI_DATA_VI_SVC; | |
605 | entry->credit_alloc = credits / 4; | |
606 | if (entry->credit_alloc == 0) | |
607 | entry->credit_alloc++; | |
608 | ||
609 | credits -= (int) entry->credit_alloc; | |
610 | if (credits <= 0) | |
611 | return status; | |
612 | ||
613 | entry++; | |
614 | entry->service_id = WMI_DATA_VO_SVC; | |
615 | entry->credit_alloc = credits / 4; | |
616 | if (entry->credit_alloc == 0) | |
617 | entry->credit_alloc++; | |
618 | ||
619 | credits -= (int) entry->credit_alloc; | |
620 | if (credits <= 0) | |
621 | return status; | |
622 | ||
623 | entry++; | |
624 | entry->service_id = WMI_CONTROL_SVC; | |
625 | entry->credit_alloc = credit_per_maxmsg; | |
626 | credits -= (int) entry->credit_alloc; | |
627 | if (credits <= 0) | |
628 | return status; | |
629 | ||
630 | entry++; | |
631 | entry->service_id = WMI_DATA_BK_SVC; | |
632 | entry->credit_alloc = credit_per_maxmsg; | |
633 | credits -= (int) entry->credit_alloc; | |
634 | if (credits <= 0) | |
635 | return status; | |
636 | ||
637 | /* leftovers go to best effort */ | |
638 | entry++; | |
639 | entry->service_id = WMI_DATA_BE_SVC; | |
640 | entry->credit_alloc = (u8) credits; | |
641 | status = 0; | |
642 | } | |
643 | ||
644 | if (status == 0) { | |
645 | for (i = 0; i < ENDPOINT_MAX; i++) { | |
646 | if (target->pipe.txcredit_alloc[i].service_id != 0) { | |
647 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
648 | "HTC Service Index : %d TX : 0x%2.2X : alloc:%d\n", | |
649 | i, | |
650 | target->pipe.txcredit_alloc[i]. | |
651 | service_id, | |
652 | target->pipe.txcredit_alloc[i]. | |
653 | credit_alloc); | |
654 | } | |
655 | } | |
656 | } | |
657 | return status; | |
658 | } | |
659 | ||
660 | /* process credit reports and call distribution function */ | |
661 | static void htc_process_credit_report(struct htc_target *target, | |
662 | struct htc_credit_report *rpt, | |
663 | int num_entries, | |
664 | enum htc_endpoint_id from_ep) | |
665 | { | |
666 | int total_credits = 0, i; | |
667 | struct htc_endpoint *ep; | |
668 | ||
669 | /* lock out TX while we update credits */ | |
670 | spin_lock_bh(&target->tx_lock); | |
671 | ||
672 | for (i = 0; i < num_entries; i++, rpt++) { | |
673 | if (rpt->eid >= ENDPOINT_MAX) { | |
674 | WARN_ON_ONCE(1); | |
675 | spin_unlock_bh(&target->tx_lock); | |
676 | return; | |
677 | } | |
678 | ||
679 | ep = &target->endpoint[rpt->eid]; | |
680 | ep->cred_dist.credits += rpt->credits; | |
681 | ||
682 | if (ep->cred_dist.credits && get_queue_depth(&ep->txq)) { | |
683 | spin_unlock_bh(&target->tx_lock); | |
684 | htc_try_send(target, ep, NULL); | |
685 | spin_lock_bh(&target->tx_lock); | |
686 | } | |
687 | ||
688 | total_credits += rpt->credits; | |
689 | } | |
690 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
691 | "Report indicated %d credits to distribute\n", | |
692 | total_credits); | |
693 | ||
694 | spin_unlock_bh(&target->tx_lock); | |
695 | } | |
696 | ||
697 | /* flush endpoint TX queue */ | |
698 | static void htc_flush_tx_endpoint(struct htc_target *target, | |
699 | struct htc_endpoint *ep, u16 tag) | |
700 | { | |
701 | struct htc_packet *packet; | |
702 | ||
703 | spin_lock_bh(&target->tx_lock); | |
704 | while (get_queue_depth(&ep->txq)) { | |
705 | packet = list_first_entry(&ep->txq, struct htc_packet, list); | |
706 | list_del(&packet->list); | |
707 | packet->status = 0; | |
708 | send_packet_completion(target, packet); | |
709 | } | |
710 | spin_unlock_bh(&target->tx_lock); | |
711 | } | |
712 | ||
713 | /* | |
714 | * In the adapted HIF layer, struct sk_buff * are passed between HIF and HTC, | |
715 | * since upper layers expects struct htc_packet containers we use the completed | |
716 | * skb and lookup it's corresponding HTC packet buffer from a lookup list. | |
717 | * This is extra overhead that can be fixed by re-aligning HIF interfaces with | |
718 | * HTC. | |
719 | */ | |
720 | static struct htc_packet *htc_lookup_tx_packet(struct htc_target *target, | |
721 | struct htc_endpoint *ep, | |
722 | struct sk_buff *skb) | |
723 | { | |
724 | struct htc_packet *packet, *tmp_pkt, *found_packet = NULL; | |
725 | ||
726 | spin_lock_bh(&target->tx_lock); | |
727 | ||
728 | /* | |
729 | * interate from the front of tx lookup queue | |
730 | * this lookup should be fast since lower layers completes in-order and | |
731 | * so the completed packet should be at the head of the list generally | |
732 | */ | |
733 | list_for_each_entry_safe(packet, tmp_pkt, &ep->pipe.tx_lookup_queue, | |
734 | list) { | |
735 | /* check for removal */ | |
736 | if (skb == packet->skb) { | |
737 | /* found it */ | |
738 | list_del(&packet->list); | |
739 | found_packet = packet; | |
740 | break; | |
741 | } | |
742 | } | |
743 | ||
744 | spin_unlock_bh(&target->tx_lock); | |
745 | ||
746 | return found_packet; | |
747 | } | |
748 | ||
749 | static int ath6kl_htc_pipe_tx_complete(struct ath6kl *ar, struct sk_buff *skb) | |
750 | { | |
751 | struct htc_target *target = ar->htc_target; | |
752 | struct htc_frame_hdr *htc_hdr; | |
753 | struct htc_endpoint *ep; | |
754 | struct htc_packet *packet; | |
755 | u8 ep_id, *netdata; | |
756 | u32 netlen; | |
757 | ||
758 | netdata = skb->data; | |
759 | netlen = skb->len; | |
760 | ||
761 | htc_hdr = (struct htc_frame_hdr *) netdata; | |
762 | ||
763 | ep_id = htc_hdr->eid; | |
764 | ep = &target->endpoint[ep_id]; | |
765 | ||
766 | packet = htc_lookup_tx_packet(target, ep, skb); | |
767 | if (packet == NULL) { | |
768 | /* may have already been flushed and freed */ | |
769 | ath6kl_err("HTC TX lookup failed!\n"); | |
770 | } else { | |
771 | /* will be giving this buffer back to upper layers */ | |
772 | packet->status = 0; | |
773 | send_packet_completion(target, packet); | |
774 | } | |
775 | skb = NULL; | |
776 | ||
777 | if (!ep->pipe.tx_credit_flow_enabled) { | |
778 | /* | |
779 | * note: when using TX credit flow, the re-checking of queues | |
780 | * happens when credits flow back from the target. in the | |
781 | * non-TX credit case, we recheck after the packet completes | |
782 | */ | |
783 | htc_try_send(target, ep, NULL); | |
784 | } | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | static int htc_send_packets_multiple(struct htc_target *target, | |
790 | struct list_head *pkt_queue) | |
791 | { | |
792 | struct htc_endpoint *ep; | |
793 | struct htc_packet *packet, *tmp_pkt; | |
794 | ||
795 | if (list_empty(pkt_queue)) | |
796 | return -EINVAL; | |
797 | ||
798 | /* get first packet to find out which ep the packets will go into */ | |
799 | packet = list_first_entry(pkt_queue, struct htc_packet, list); | |
636f8288 KV |
800 | |
801 | if (packet->endpoint >= ENDPOINT_MAX) { | |
802 | WARN_ON_ONCE(1); | |
803 | return -EINVAL; | |
804 | } | |
805 | ep = &target->endpoint[packet->endpoint]; | |
806 | ||
807 | htc_try_send(target, ep, pkt_queue); | |
808 | ||
809 | /* do completion on any packets that couldn't get in */ | |
810 | if (!list_empty(pkt_queue)) { | |
811 | list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { | |
812 | packet->status = -ENOMEM; | |
813 | } | |
814 | ||
815 | do_send_completion(ep, pkt_queue); | |
816 | } | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
821 | /* htc pipe rx path */ | |
822 | static struct htc_packet *alloc_htc_packet_container(struct htc_target *target) | |
823 | { | |
824 | struct htc_packet *packet; | |
825 | spin_lock_bh(&target->rx_lock); | |
826 | ||
827 | if (target->pipe.htc_packet_pool == NULL) { | |
828 | spin_unlock_bh(&target->rx_lock); | |
829 | return NULL; | |
830 | } | |
831 | ||
832 | packet = target->pipe.htc_packet_pool; | |
833 | target->pipe.htc_packet_pool = (struct htc_packet *) packet->list.next; | |
834 | ||
835 | spin_unlock_bh(&target->rx_lock); | |
836 | ||
837 | packet->list.next = NULL; | |
838 | return packet; | |
839 | } | |
840 | ||
841 | static void free_htc_packet_container(struct htc_target *target, | |
842 | struct htc_packet *packet) | |
843 | { | |
844 | struct list_head *lh; | |
845 | ||
846 | spin_lock_bh(&target->rx_lock); | |
847 | ||
848 | if (target->pipe.htc_packet_pool == NULL) { | |
849 | target->pipe.htc_packet_pool = packet; | |
850 | packet->list.next = NULL; | |
851 | } else { | |
852 | lh = (struct list_head *) target->pipe.htc_packet_pool; | |
853 | packet->list.next = lh; | |
854 | target->pipe.htc_packet_pool = packet; | |
855 | } | |
856 | ||
857 | spin_unlock_bh(&target->rx_lock); | |
858 | } | |
859 | ||
860 | static int htc_process_trailer(struct htc_target *target, u8 *buffer, | |
861 | int len, enum htc_endpoint_id from_ep) | |
862 | { | |
863 | struct htc_credit_report *report; | |
864 | struct htc_record_hdr *record; | |
865 | u8 *record_buf, *orig_buf; | |
866 | int orig_len, status; | |
867 | ||
868 | orig_buf = buffer; | |
869 | orig_len = len; | |
870 | status = 0; | |
871 | ||
872 | while (len > 0) { | |
873 | if (len < sizeof(struct htc_record_hdr)) { | |
874 | status = -EINVAL; | |
875 | break; | |
876 | } | |
877 | ||
878 | /* these are byte aligned structs */ | |
879 | record = (struct htc_record_hdr *) buffer; | |
880 | len -= sizeof(struct htc_record_hdr); | |
881 | buffer += sizeof(struct htc_record_hdr); | |
882 | ||
883 | if (record->len > len) { | |
884 | /* no room left in buffer for record */ | |
885 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
886 | "invalid length: %d (id:%d) buffer has: %d bytes left\n", | |
887 | record->len, record->rec_id, len); | |
888 | status = -EINVAL; | |
889 | break; | |
890 | } | |
891 | ||
892 | /* start of record follows the header */ | |
893 | record_buf = buffer; | |
894 | ||
895 | switch (record->rec_id) { | |
896 | case HTC_RECORD_CREDITS: | |
897 | if (record->len < sizeof(struct htc_credit_report)) { | |
898 | WARN_ON_ONCE(1); | |
899 | return -EINVAL; | |
900 | } | |
901 | ||
902 | report = (struct htc_credit_report *) record_buf; | |
903 | htc_process_credit_report(target, report, | |
904 | record->len / sizeof(*report), | |
905 | from_ep); | |
906 | break; | |
907 | default: | |
908 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
909 | "unhandled record: id:%d length:%d\n", | |
910 | record->rec_id, record->len); | |
911 | break; | |
912 | } | |
913 | ||
914 | if (status != 0) | |
915 | break; | |
916 | ||
917 | /* advance buffer past this record for next time around */ | |
918 | buffer += record->len; | |
919 | len -= record->len; | |
920 | } | |
921 | ||
922 | return status; | |
923 | } | |
924 | ||
925 | static void do_recv_completion(struct htc_endpoint *ep, | |
926 | struct list_head *queue_to_indicate) | |
927 | { | |
928 | struct htc_packet *packet; | |
929 | ||
930 | if (list_empty(queue_to_indicate)) { | |
931 | /* nothing to indicate */ | |
932 | return; | |
933 | } | |
934 | ||
935 | /* using legacy EpRecv */ | |
936 | while (!list_empty(queue_to_indicate)) { | |
937 | packet = list_first_entry(queue_to_indicate, | |
938 | struct htc_packet, list); | |
939 | list_del(&packet->list); | |
940 | ep->ep_cb.rx(ep->target, packet); | |
941 | } | |
942 | ||
943 | return; | |
944 | } | |
945 | ||
946 | static void recv_packet_completion(struct htc_target *target, | |
947 | struct htc_endpoint *ep, | |
948 | struct htc_packet *packet) | |
949 | { | |
950 | struct list_head container; | |
951 | INIT_LIST_HEAD(&container); | |
952 | list_add_tail(&packet->list, &container); | |
953 | ||
954 | /* do completion */ | |
955 | do_recv_completion(ep, &container); | |
956 | } | |
957 | ||
958 | static int ath6kl_htc_pipe_rx_complete(struct ath6kl *ar, struct sk_buff *skb, | |
959 | u8 pipeid) | |
960 | { | |
961 | struct htc_target *target = ar->htc_target; | |
962 | u8 *netdata, *trailer, hdr_info; | |
963 | struct htc_frame_hdr *htc_hdr; | |
964 | u32 netlen, trailerlen = 0; | |
965 | struct htc_packet *packet; | |
966 | struct htc_endpoint *ep; | |
967 | u16 payload_len; | |
968 | int status = 0; | |
969 | ||
de2070fc MSS |
970 | /* |
971 | * ar->htc_target can be NULL due to a race condition that can occur | |
972 | * during driver initialization(we do 'ath6kl_hif_power_on' before | |
973 | * initializing 'ar->htc_target' via 'ath6kl_htc_create'). | |
974 | * 'ath6kl_hif_power_on' assigns 'ath6kl_recv_complete' as | |
975 | * usb_complete_t/callback function for 'usb_fill_bulk_urb'. | |
976 | * Thus the possibility of ar->htc_target being NULL | |
977 | * via ath6kl_recv_complete -> ath6kl_usb_io_comp_work. | |
978 | */ | |
979 | if (WARN_ON_ONCE(!target)) { | |
980 | ath6kl_err("Target not yet initialized\n"); | |
981 | status = -EINVAL; | |
982 | goto free_skb; | |
983 | } | |
984 | ||
985 | ||
636f8288 KV |
986 | netdata = skb->data; |
987 | netlen = skb->len; | |
988 | ||
989 | htc_hdr = (struct htc_frame_hdr *) netdata; | |
990 | ||
636f8288 KV |
991 | if (htc_hdr->eid >= ENDPOINT_MAX) { |
992 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
993 | "HTC Rx: invalid EndpointID=%d\n", | |
994 | htc_hdr->eid); | |
995 | status = -EINVAL; | |
996 | goto free_skb; | |
997 | } | |
1fdc7fe1 | 998 | ep = &target->endpoint[htc_hdr->eid]; |
636f8288 KV |
999 | |
1000 | payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len)); | |
1001 | ||
1002 | if (netlen < (payload_len + HTC_HDR_LENGTH)) { | |
1003 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1004 | "HTC Rx: insufficient length, got:%d expected =%u\n", | |
1005 | netlen, payload_len + HTC_HDR_LENGTH); | |
1006 | status = -EINVAL; | |
1007 | goto free_skb; | |
1008 | } | |
1009 | ||
1010 | /* get flags to check for trailer */ | |
1011 | hdr_info = htc_hdr->flags; | |
1012 | if (hdr_info & HTC_FLG_RX_TRAILER) { | |
1013 | /* extract the trailer length */ | |
1014 | hdr_info = htc_hdr->ctrl[0]; | |
1015 | if ((hdr_info < sizeof(struct htc_record_hdr)) || | |
1016 | (hdr_info > payload_len)) { | |
1017 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1018 | "invalid header: payloadlen should be %d, CB[0]: %d\n", | |
1019 | payload_len, hdr_info); | |
1020 | status = -EINVAL; | |
1021 | goto free_skb; | |
1022 | } | |
1023 | ||
1024 | trailerlen = hdr_info; | |
1025 | /* process trailer after hdr/apps payload */ | |
1026 | trailer = (u8 *) htc_hdr + HTC_HDR_LENGTH + | |
1027 | payload_len - hdr_info; | |
1028 | status = htc_process_trailer(target, trailer, hdr_info, | |
1029 | htc_hdr->eid); | |
1030 | if (status != 0) | |
1031 | goto free_skb; | |
1032 | } | |
1033 | ||
1034 | if (((int) payload_len - (int) trailerlen) <= 0) { | |
1035 | /* zero length packet with trailer, just drop these */ | |
1036 | goto free_skb; | |
1037 | } | |
1038 | ||
1039 | if (htc_hdr->eid == ENDPOINT_0) { | |
1040 | /* handle HTC control message */ | |
1041 | if (target->htc_flags & HTC_OP_STATE_SETUP_COMPLETE) { | |
1042 | /* | |
1043 | * fatal: target should not send unsolicited | |
1044 | * messageson the endpoint 0 | |
1045 | */ | |
1046 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1047 | "HTC ignores Rx Ctrl after setup complete\n"); | |
1048 | status = -EINVAL; | |
1049 | goto free_skb; | |
1050 | } | |
1051 | ||
1052 | /* remove HTC header */ | |
1053 | skb_pull(skb, HTC_HDR_LENGTH); | |
1054 | ||
1055 | netdata = skb->data; | |
1056 | netlen = skb->len; | |
1057 | ||
1058 | spin_lock_bh(&target->rx_lock); | |
1059 | ||
1060 | target->pipe.ctrl_response_valid = true; | |
1061 | target->pipe.ctrl_response_len = min_t(int, netlen, | |
1062 | HTC_MAX_CTRL_MSG_LEN); | |
1063 | memcpy(target->pipe.ctrl_response_buf, netdata, | |
1064 | target->pipe.ctrl_response_len); | |
1065 | ||
1066 | spin_unlock_bh(&target->rx_lock); | |
1067 | ||
1068 | dev_kfree_skb(skb); | |
1069 | skb = NULL; | |
e16ccfee | 1070 | |
636f8288 KV |
1071 | goto free_skb; |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * TODO: the message based HIF architecture allocates net bufs | |
1076 | * for recv packets since it bridges that HIF to upper layers, | |
1077 | * which expects HTC packets, we form the packets here | |
1078 | */ | |
1079 | packet = alloc_htc_packet_container(target); | |
1080 | if (packet == NULL) { | |
1081 | status = -ENOMEM; | |
1082 | goto free_skb; | |
1083 | } | |
1084 | ||
1085 | packet->status = 0; | |
1086 | packet->endpoint = htc_hdr->eid; | |
1087 | packet->pkt_cntxt = skb; | |
1088 | ||
1089 | /* TODO: for backwards compatibility */ | |
1090 | packet->buf = skb_push(skb, 0) + HTC_HDR_LENGTH; | |
1091 | packet->act_len = netlen - HTC_HDR_LENGTH - trailerlen; | |
1092 | ||
1093 | /* | |
1094 | * TODO: this is a hack because the driver layer will set the | |
1095 | * actual len of the skb again which will just double the len | |
1096 | */ | |
1097 | skb_trim(skb, 0); | |
1098 | ||
1099 | recv_packet_completion(target, ep, packet); | |
1100 | ||
1101 | /* recover the packet container */ | |
1102 | free_htc_packet_container(target, packet); | |
1103 | skb = NULL; | |
1104 | ||
1105 | free_skb: | |
e16ccfee | 1106 | dev_kfree_skb(skb); |
636f8288 KV |
1107 | |
1108 | return status; | |
1109 | ||
1110 | } | |
1111 | ||
1112 | static void htc_flush_rx_queue(struct htc_target *target, | |
1113 | struct htc_endpoint *ep) | |
1114 | { | |
1115 | struct list_head container; | |
1116 | struct htc_packet *packet; | |
1117 | ||
1118 | spin_lock_bh(&target->rx_lock); | |
1119 | ||
1120 | while (1) { | |
1121 | if (list_empty(&ep->rx_bufq)) | |
1122 | break; | |
1123 | ||
1124 | packet = list_first_entry(&ep->rx_bufq, | |
1125 | struct htc_packet, list); | |
1126 | list_del(&packet->list); | |
1127 | ||
1128 | spin_unlock_bh(&target->rx_lock); | |
1129 | packet->status = -ECANCELED; | |
1130 | packet->act_len = 0; | |
1131 | ||
1132 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1133 | "Flushing RX packet:0x%p, length:%d, ep:%d\n", | |
1134 | packet, packet->buf_len, | |
1135 | packet->endpoint); | |
1136 | ||
1137 | INIT_LIST_HEAD(&container); | |
1138 | list_add_tail(&packet->list, &container); | |
1139 | ||
1140 | /* give the packet back */ | |
1141 | do_recv_completion(ep, &container); | |
1142 | spin_lock_bh(&target->rx_lock); | |
1143 | } | |
1144 | ||
1145 | spin_unlock_bh(&target->rx_lock); | |
1146 | } | |
1147 | ||
1148 | /* polling routine to wait for a control packet to be received */ | |
1149 | static int htc_wait_recv_ctrl_message(struct htc_target *target) | |
1150 | { | |
1151 | int count = HTC_TARGET_RESPONSE_POLL_COUNT; | |
1152 | ||
1153 | while (count > 0) { | |
1154 | spin_lock_bh(&target->rx_lock); | |
1155 | ||
1156 | if (target->pipe.ctrl_response_valid) { | |
1157 | target->pipe.ctrl_response_valid = false; | |
1158 | spin_unlock_bh(&target->rx_lock); | |
1159 | break; | |
1160 | } | |
1161 | ||
1162 | spin_unlock_bh(&target->rx_lock); | |
1163 | ||
1164 | count--; | |
1165 | ||
1166 | msleep_interruptible(HTC_TARGET_RESPONSE_POLL_WAIT); | |
1167 | } | |
1168 | ||
1169 | if (count <= 0) { | |
1170 | ath6kl_dbg(ATH6KL_DBG_HTC, "%s: Timeout!\n", __func__); | |
1171 | return -ECOMM; | |
1172 | } | |
1173 | ||
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | static void htc_rxctrl_complete(struct htc_target *context, | |
1178 | struct htc_packet *packet) | |
1179 | { | |
1180 | /* TODO, can't really receive HTC control messages yet.... */ | |
1181 | ath6kl_dbg(ATH6KL_DBG_HTC, "%s: invalid call function\n", __func__); | |
1182 | } | |
1183 | ||
1184 | /* htc pipe initialization */ | |
1185 | static void reset_endpoint_states(struct htc_target *target) | |
1186 | { | |
1187 | struct htc_endpoint *ep; | |
1188 | int i; | |
1189 | ||
1190 | for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) { | |
1191 | ep = &target->endpoint[i]; | |
1192 | ep->svc_id = 0; | |
1193 | ep->len_max = 0; | |
1194 | ep->max_txq_depth = 0; | |
1195 | ep->eid = i; | |
1196 | INIT_LIST_HEAD(&ep->txq); | |
1197 | INIT_LIST_HEAD(&ep->pipe.tx_lookup_queue); | |
1198 | INIT_LIST_HEAD(&ep->rx_bufq); | |
1199 | ep->target = target; | |
895dc386 | 1200 | ep->pipe.tx_credit_flow_enabled = true; |
636f8288 KV |
1201 | } |
1202 | } | |
1203 | ||
1204 | /* start HTC, this is called after all services are connected */ | |
1205 | static int htc_config_target_hif_pipe(struct htc_target *target) | |
1206 | { | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /* htc service functions */ | |
1211 | static u8 htc_get_credit_alloc(struct htc_target *target, u16 service_id) | |
1212 | { | |
1213 | u8 allocation = 0; | |
1214 | int i; | |
1215 | ||
1216 | for (i = 0; i < ENDPOINT_MAX; i++) { | |
1217 | if (target->pipe.txcredit_alloc[i].service_id == service_id) | |
1218 | allocation = | |
1219 | target->pipe.txcredit_alloc[i].credit_alloc; | |
1220 | } | |
1221 | ||
1222 | if (allocation == 0) { | |
1223 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1224 | "HTC Service TX : 0x%2.2X : allocation is zero!\n", | |
1225 | service_id); | |
1226 | } | |
1227 | ||
1228 | return allocation; | |
1229 | } | |
1230 | ||
1231 | static int ath6kl_htc_pipe_conn_service(struct htc_target *target, | |
1232 | struct htc_service_connect_req *conn_req, | |
1233 | struct htc_service_connect_resp *conn_resp) | |
1234 | { | |
1235 | struct ath6kl *ar = target->dev->ar; | |
1236 | struct htc_packet *packet = NULL; | |
1237 | struct htc_conn_service_resp *resp_msg; | |
1238 | struct htc_conn_service_msg *conn_msg; | |
1239 | enum htc_endpoint_id assigned_epid = ENDPOINT_MAX; | |
1240 | bool disable_credit_flowctrl = false; | |
1241 | unsigned int max_msg_size = 0; | |
1242 | struct htc_endpoint *ep; | |
1243 | int length, status = 0; | |
1244 | struct sk_buff *skb; | |
1245 | u8 tx_alloc; | |
1246 | u16 flags; | |
1247 | ||
1248 | if (conn_req->svc_id == 0) { | |
1249 | WARN_ON_ONCE(1); | |
1250 | status = -EINVAL; | |
1251 | goto free_packet; | |
1252 | } | |
1253 | ||
1254 | if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) { | |
1255 | /* special case for pseudo control service */ | |
1256 | assigned_epid = ENDPOINT_0; | |
1257 | max_msg_size = HTC_MAX_CTRL_MSG_LEN; | |
1258 | tx_alloc = 0; | |
1259 | ||
1260 | } else { | |
1261 | ||
1262 | tx_alloc = htc_get_credit_alloc(target, conn_req->svc_id); | |
1263 | if (tx_alloc == 0) { | |
1264 | status = -ENOMEM; | |
1265 | goto free_packet; | |
1266 | } | |
1267 | ||
1268 | /* allocate a packet to send to the target */ | |
1269 | packet = htc_alloc_txctrl_packet(target); | |
1270 | ||
1271 | if (packet == NULL) { | |
1272 | WARN_ON_ONCE(1); | |
1273 | status = -ENOMEM; | |
1274 | goto free_packet; | |
1275 | } | |
1276 | ||
1277 | skb = packet->skb; | |
1278 | length = sizeof(struct htc_conn_service_msg); | |
1279 | ||
1280 | /* assemble connect service message */ | |
1281 | conn_msg = (struct htc_conn_service_msg *) skb_put(skb, | |
1282 | length); | |
1283 | if (conn_msg == NULL) { | |
1284 | WARN_ON_ONCE(1); | |
1285 | status = -EINVAL; | |
1286 | goto free_packet; | |
1287 | } | |
1288 | ||
1289 | memset(conn_msg, 0, | |
1290 | sizeof(struct htc_conn_service_msg)); | |
1291 | conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID); | |
1292 | conn_msg->svc_id = cpu_to_le16(conn_req->svc_id); | |
1293 | conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags & | |
1294 | ~HTC_CONN_FLGS_SET_RECV_ALLOC_MASK); | |
1295 | ||
1296 | /* tell target desired recv alloc for this ep */ | |
1297 | flags = tx_alloc << HTC_CONN_FLGS_SET_RECV_ALLOC_SHIFT; | |
1298 | conn_msg->conn_flags |= cpu_to_le16(flags); | |
1299 | ||
1300 | if (conn_req->conn_flags & | |
1301 | HTC_CONN_FLGS_DISABLE_CRED_FLOW_CTRL) { | |
1302 | disable_credit_flowctrl = true; | |
1303 | } | |
1304 | ||
1305 | set_htc_pkt_info(packet, NULL, (u8 *) conn_msg, | |
1306 | length, | |
1307 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
1308 | ||
1309 | status = ath6kl_htc_pipe_tx(target, packet); | |
1310 | ||
1311 | /* we don't own it anymore */ | |
1312 | packet = NULL; | |
1313 | if (status != 0) | |
1314 | goto free_packet; | |
1315 | ||
1316 | /* wait for response */ | |
1317 | status = htc_wait_recv_ctrl_message(target); | |
1318 | if (status != 0) | |
1319 | goto free_packet; | |
1320 | ||
1321 | /* we controlled the buffer creation so it has to be | |
1322 | * properly aligned | |
1323 | */ | |
1324 | resp_msg = (struct htc_conn_service_resp *) | |
1325 | target->pipe.ctrl_response_buf; | |
1326 | ||
1327 | if (resp_msg->msg_id != cpu_to_le16(HTC_MSG_CONN_SVC_RESP_ID) || | |
1328 | (target->pipe.ctrl_response_len < sizeof(*resp_msg))) { | |
1329 | /* this message is not valid */ | |
1330 | WARN_ON_ONCE(1); | |
1331 | status = -EINVAL; | |
1332 | goto free_packet; | |
1333 | } | |
1334 | ||
1335 | ath6kl_dbg(ATH6KL_DBG_TRC, | |
1336 | "%s: service 0x%X conn resp: status: %d ep: %d\n", | |
1337 | __func__, resp_msg->svc_id, resp_msg->status, | |
1338 | resp_msg->eid); | |
1339 | ||
1340 | conn_resp->resp_code = resp_msg->status; | |
1341 | /* check response status */ | |
1342 | if (resp_msg->status != HTC_SERVICE_SUCCESS) { | |
1343 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1344 | "Target failed service 0x%X connect request (status:%d)\n", | |
1345 | resp_msg->svc_id, resp_msg->status); | |
1346 | status = -EINVAL; | |
1347 | goto free_packet; | |
1348 | } | |
1349 | ||
1350 | assigned_epid = (enum htc_endpoint_id) resp_msg->eid; | |
1351 | max_msg_size = le16_to_cpu(resp_msg->max_msg_sz); | |
1352 | } | |
1353 | ||
1354 | /* the rest are parameter checks so set the error status */ | |
1355 | status = -EINVAL; | |
1356 | ||
1357 | if (assigned_epid >= ENDPOINT_MAX) { | |
1358 | WARN_ON_ONCE(1); | |
1359 | goto free_packet; | |
1360 | } | |
1361 | ||
1362 | if (max_msg_size == 0) { | |
1363 | WARN_ON_ONCE(1); | |
1364 | goto free_packet; | |
1365 | } | |
1366 | ||
1367 | ep = &target->endpoint[assigned_epid]; | |
1368 | ep->eid = assigned_epid; | |
1369 | if (ep->svc_id != 0) { | |
1370 | /* endpoint already in use! */ | |
1371 | WARN_ON_ONCE(1); | |
1372 | goto free_packet; | |
1373 | } | |
1374 | ||
1375 | /* return assigned endpoint to caller */ | |
1376 | conn_resp->endpoint = assigned_epid; | |
1377 | conn_resp->len_max = max_msg_size; | |
1378 | ||
1379 | /* setup the endpoint */ | |
1380 | ep->svc_id = conn_req->svc_id; /* this marks ep in use */ | |
1381 | ep->max_txq_depth = conn_req->max_txq_depth; | |
1382 | ep->len_max = max_msg_size; | |
1383 | ep->cred_dist.credits = tx_alloc; | |
1384 | ep->cred_dist.cred_sz = target->tgt_cred_sz; | |
1385 | ep->cred_dist.cred_per_msg = max_msg_size / target->tgt_cred_sz; | |
1386 | if (max_msg_size % target->tgt_cred_sz) | |
1387 | ep->cred_dist.cred_per_msg++; | |
1388 | ||
1389 | /* copy all the callbacks */ | |
1390 | ep->ep_cb = conn_req->ep_cb; | |
1391 | ||
096797ab KF |
1392 | /* initialize tx_drop_packet_threshold */ |
1393 | ep->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM; | |
1394 | ||
636f8288 KV |
1395 | status = ath6kl_hif_pipe_map_service(ar, ep->svc_id, |
1396 | &ep->pipe.pipeid_ul, | |
1397 | &ep->pipe.pipeid_dl); | |
1398 | if (status != 0) | |
1399 | goto free_packet; | |
1400 | ||
1401 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1402 | "SVC Ready: 0x%4.4X: ULpipe:%d DLpipe:%d id:%d\n", | |
1403 | ep->svc_id, ep->pipe.pipeid_ul, | |
1404 | ep->pipe.pipeid_dl, ep->eid); | |
1405 | ||
1406 | if (disable_credit_flowctrl && ep->pipe.tx_credit_flow_enabled) { | |
1407 | ep->pipe.tx_credit_flow_enabled = false; | |
1408 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1409 | "SVC: 0x%4.4X ep:%d TX flow control off\n", | |
1410 | ep->svc_id, assigned_epid); | |
1411 | } | |
1412 | ||
1413 | free_packet: | |
1414 | if (packet != NULL) | |
1415 | htc_free_txctrl_packet(target, packet); | |
1416 | return status; | |
1417 | } | |
1418 | ||
1419 | /* htc export functions */ | |
1420 | static void *ath6kl_htc_pipe_create(struct ath6kl *ar) | |
1421 | { | |
1422 | int status = 0; | |
1423 | struct htc_endpoint *ep = NULL; | |
1424 | struct htc_target *target = NULL; | |
1425 | struct htc_packet *packet; | |
1426 | int i; | |
1427 | ||
1428 | target = kzalloc(sizeof(struct htc_target), GFP_KERNEL); | |
1429 | if (target == NULL) { | |
1430 | ath6kl_err("htc create unable to allocate memory\n"); | |
1431 | status = -ENOMEM; | |
1432 | goto fail_htc_create; | |
1433 | } | |
1434 | ||
1435 | spin_lock_init(&target->htc_lock); | |
1436 | spin_lock_init(&target->rx_lock); | |
1437 | spin_lock_init(&target->tx_lock); | |
1438 | ||
1439 | reset_endpoint_states(target); | |
1440 | ||
1441 | for (i = 0; i < HTC_PACKET_CONTAINER_ALLOCATION; i++) { | |
1442 | packet = kzalloc(sizeof(struct htc_packet), GFP_KERNEL); | |
1443 | ||
1444 | if (packet != NULL) | |
1445 | free_htc_packet_container(target, packet); | |
1446 | } | |
1447 | ||
1448 | target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); | |
1449 | if (!target->dev) { | |
1450 | ath6kl_err("unable to allocate memory\n"); | |
1451 | status = -ENOMEM; | |
1452 | goto fail_htc_create; | |
1453 | } | |
1454 | target->dev->ar = ar; | |
1455 | target->dev->htc_cnxt = target; | |
1456 | ||
1457 | /* Get HIF default pipe for HTC message exchange */ | |
1458 | ep = &target->endpoint[ENDPOINT_0]; | |
1459 | ||
1460 | ath6kl_hif_pipe_get_default(ar, &ep->pipe.pipeid_ul, | |
1461 | &ep->pipe.pipeid_dl); | |
1462 | ||
1463 | return target; | |
1464 | ||
1465 | fail_htc_create: | |
1466 | if (status != 0) { | |
1467 | if (target != NULL) | |
1468 | ath6kl_htc_pipe_cleanup(target); | |
1469 | ||
1470 | target = NULL; | |
1471 | } | |
1472 | return target; | |
1473 | } | |
1474 | ||
1475 | /* cleanup the HTC instance */ | |
1476 | static void ath6kl_htc_pipe_cleanup(struct htc_target *target) | |
1477 | { | |
1478 | struct htc_packet *packet; | |
1479 | ||
1480 | while (true) { | |
1481 | packet = alloc_htc_packet_container(target); | |
1482 | if (packet == NULL) | |
1483 | break; | |
1484 | kfree(packet); | |
1485 | } | |
1486 | ||
1487 | kfree(target->dev); | |
1488 | ||
1489 | /* kfree our instance */ | |
1490 | kfree(target); | |
1491 | } | |
1492 | ||
1493 | static int ath6kl_htc_pipe_start(struct htc_target *target) | |
1494 | { | |
1495 | struct sk_buff *skb; | |
1496 | struct htc_setup_comp_ext_msg *setup; | |
1497 | struct htc_packet *packet; | |
1498 | ||
1499 | htc_config_target_hif_pipe(target); | |
1500 | ||
1501 | /* allocate a buffer to send */ | |
1502 | packet = htc_alloc_txctrl_packet(target); | |
1503 | if (packet == NULL) { | |
1504 | WARN_ON_ONCE(1); | |
1505 | return -ENOMEM; | |
1506 | } | |
1507 | ||
1508 | skb = packet->skb; | |
1509 | ||
1510 | /* assemble setup complete message */ | |
1511 | setup = (struct htc_setup_comp_ext_msg *) skb_put(skb, | |
1512 | sizeof(*setup)); | |
1513 | memset(setup, 0, sizeof(struct htc_setup_comp_ext_msg)); | |
1514 | setup->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID); | |
1515 | ||
1516 | ath6kl_dbg(ATH6KL_DBG_HTC, "HTC using TX credit flow control\n"); | |
1517 | ||
1518 | set_htc_pkt_info(packet, NULL, (u8 *) setup, | |
1519 | sizeof(struct htc_setup_comp_ext_msg), | |
1520 | ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG); | |
1521 | ||
1522 | target->htc_flags |= HTC_OP_STATE_SETUP_COMPLETE; | |
1523 | ||
1524 | return ath6kl_htc_pipe_tx(target, packet); | |
1525 | } | |
1526 | ||
1527 | static void ath6kl_htc_pipe_stop(struct htc_target *target) | |
1528 | { | |
1529 | int i; | |
1530 | struct htc_endpoint *ep; | |
1531 | ||
1532 | /* cleanup endpoints */ | |
1533 | for (i = 0; i < ENDPOINT_MAX; i++) { | |
1534 | ep = &target->endpoint[i]; | |
1535 | htc_flush_rx_queue(target, ep); | |
1536 | htc_flush_tx_endpoint(target, ep, HTC_TX_PACKET_TAG_ALL); | |
1537 | } | |
1538 | ||
1539 | reset_endpoint_states(target); | |
1540 | target->htc_flags &= ~HTC_OP_STATE_SETUP_COMPLETE; | |
1541 | } | |
1542 | ||
1543 | static int ath6kl_htc_pipe_get_rxbuf_num(struct htc_target *target, | |
1544 | enum htc_endpoint_id endpoint) | |
1545 | { | |
1546 | int num; | |
1547 | ||
1548 | spin_lock_bh(&target->rx_lock); | |
1549 | num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq)); | |
1550 | spin_unlock_bh(&target->rx_lock); | |
1551 | ||
1552 | return num; | |
1553 | } | |
1554 | ||
1555 | static int ath6kl_htc_pipe_tx(struct htc_target *target, | |
1556 | struct htc_packet *packet) | |
1557 | { | |
1558 | struct list_head queue; | |
1559 | ||
1560 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1561 | "%s: endPointId: %d, buffer: 0x%p, length: %d\n", | |
1562 | __func__, packet->endpoint, packet->buf, | |
1563 | packet->act_len); | |
1564 | ||
1565 | INIT_LIST_HEAD(&queue); | |
1566 | list_add_tail(&packet->list, &queue); | |
1567 | ||
1568 | return htc_send_packets_multiple(target, &queue); | |
1569 | } | |
1570 | ||
1571 | static int ath6kl_htc_pipe_wait_target(struct htc_target *target) | |
1572 | { | |
1573 | struct htc_ready_ext_msg *ready_msg; | |
1574 | struct htc_service_connect_req connect; | |
1575 | struct htc_service_connect_resp resp; | |
1576 | int status = 0; | |
1577 | ||
1578 | status = htc_wait_recv_ctrl_message(target); | |
1579 | ||
1580 | if (status != 0) | |
1581 | return status; | |
1582 | ||
1583 | if (target->pipe.ctrl_response_len < sizeof(*ready_msg)) { | |
1584 | ath6kl_dbg(ATH6KL_DBG_HTC, "invalid htc ready msg len:%d!\n", | |
1585 | target->pipe.ctrl_response_len); | |
1586 | return -ECOMM; | |
1587 | } | |
1588 | ||
1589 | ready_msg = (struct htc_ready_ext_msg *) target->pipe.ctrl_response_buf; | |
1590 | ||
1591 | if (ready_msg->ver2_0_info.msg_id != cpu_to_le16(HTC_MSG_READY_ID)) { | |
1592 | ath6kl_dbg(ATH6KL_DBG_HTC, "invalid htc ready msg : 0x%X !\n", | |
1593 | ready_msg->ver2_0_info.msg_id); | |
1594 | return -ECOMM; | |
1595 | } | |
1596 | ||
1597 | ath6kl_dbg(ATH6KL_DBG_HTC, | |
1598 | "Target Ready! : transmit resources : %d size:%d\n", | |
1599 | ready_msg->ver2_0_info.cred_cnt, | |
1600 | ready_msg->ver2_0_info.cred_sz); | |
1601 | ||
1602 | target->tgt_creds = le16_to_cpu(ready_msg->ver2_0_info.cred_cnt); | |
1603 | target->tgt_cred_sz = le16_to_cpu(ready_msg->ver2_0_info.cred_sz); | |
1604 | ||
1605 | if ((target->tgt_creds == 0) || (target->tgt_cred_sz == 0)) | |
1606 | return -ECOMM; | |
1607 | ||
1608 | htc_setup_target_buffer_assignments(target); | |
1609 | ||
1610 | /* setup our pseudo HTC control endpoint connection */ | |
1611 | memset(&connect, 0, sizeof(connect)); | |
1612 | memset(&resp, 0, sizeof(resp)); | |
1613 | connect.ep_cb.tx_complete = htc_txctrl_complete; | |
1614 | connect.ep_cb.rx = htc_rxctrl_complete; | |
1615 | connect.max_txq_depth = NUM_CONTROL_TX_BUFFERS; | |
1616 | connect.svc_id = HTC_CTRL_RSVD_SVC; | |
1617 | ||
1618 | /* connect fake service */ | |
1619 | status = ath6kl_htc_pipe_conn_service(target, &connect, &resp); | |
1620 | ||
1621 | return status; | |
1622 | } | |
1623 | ||
1624 | static void ath6kl_htc_pipe_flush_txep(struct htc_target *target, | |
1625 | enum htc_endpoint_id endpoint, u16 tag) | |
1626 | { | |
1627 | struct htc_endpoint *ep = &target->endpoint[endpoint]; | |
1628 | ||
1629 | if (ep->svc_id == 0) { | |
1630 | WARN_ON_ONCE(1); | |
1631 | /* not in use.. */ | |
1632 | return; | |
1633 | } | |
1634 | ||
1635 | htc_flush_tx_endpoint(target, ep, tag); | |
1636 | } | |
1637 | ||
1638 | static int ath6kl_htc_pipe_add_rxbuf_multiple(struct htc_target *target, | |
1639 | struct list_head *pkt_queue) | |
1640 | { | |
1641 | struct htc_packet *packet, *tmp_pkt, *first; | |
1642 | struct htc_endpoint *ep; | |
1643 | int status = 0; | |
1644 | ||
1645 | if (list_empty(pkt_queue)) | |
1646 | return -EINVAL; | |
1647 | ||
1648 | first = list_first_entry(pkt_queue, struct htc_packet, list); | |
636f8288 KV |
1649 | |
1650 | if (first->endpoint >= ENDPOINT_MAX) { | |
1651 | WARN_ON_ONCE(1); | |
1652 | return -EINVAL; | |
1653 | } | |
1654 | ||
1655 | ath6kl_dbg(ATH6KL_DBG_HTC, "%s: epid: %d, cnt:%d, len: %d\n", | |
1656 | __func__, first->endpoint, get_queue_depth(pkt_queue), | |
1657 | first->buf_len); | |
1658 | ||
1659 | ep = &target->endpoint[first->endpoint]; | |
1660 | ||
1661 | spin_lock_bh(&target->rx_lock); | |
1662 | ||
1663 | /* store receive packets */ | |
1664 | list_splice_tail_init(pkt_queue, &ep->rx_bufq); | |
1665 | ||
1666 | spin_unlock_bh(&target->rx_lock); | |
1667 | ||
1668 | if (status != 0) { | |
1669 | /* walk through queue and mark each one canceled */ | |
1670 | list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) { | |
1671 | packet->status = -ECANCELED; | |
1672 | } | |
1673 | ||
1674 | do_recv_completion(ep, pkt_queue); | |
1675 | } | |
1676 | ||
1677 | return status; | |
1678 | } | |
1679 | ||
1680 | static void ath6kl_htc_pipe_activity_changed(struct htc_target *target, | |
1681 | enum htc_endpoint_id ep, | |
1682 | bool active) | |
1683 | { | |
1684 | /* TODO */ | |
1685 | } | |
1686 | ||
1687 | static void ath6kl_htc_pipe_flush_rx_buf(struct htc_target *target) | |
1688 | { | |
1689 | /* TODO */ | |
1690 | } | |
1691 | ||
1692 | static int ath6kl_htc_pipe_credit_setup(struct htc_target *target, | |
1693 | struct ath6kl_htc_credit_info *info) | |
1694 | { | |
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | static const struct ath6kl_htc_ops ath6kl_htc_pipe_ops = { | |
1699 | .create = ath6kl_htc_pipe_create, | |
1700 | .wait_target = ath6kl_htc_pipe_wait_target, | |
1701 | .start = ath6kl_htc_pipe_start, | |
1702 | .conn_service = ath6kl_htc_pipe_conn_service, | |
1703 | .tx = ath6kl_htc_pipe_tx, | |
1704 | .stop = ath6kl_htc_pipe_stop, | |
1705 | .cleanup = ath6kl_htc_pipe_cleanup, | |
1706 | .flush_txep = ath6kl_htc_pipe_flush_txep, | |
1707 | .flush_rx_buf = ath6kl_htc_pipe_flush_rx_buf, | |
1708 | .activity_changed = ath6kl_htc_pipe_activity_changed, | |
1709 | .get_rxbuf_num = ath6kl_htc_pipe_get_rxbuf_num, | |
1710 | .add_rxbuf_multiple = ath6kl_htc_pipe_add_rxbuf_multiple, | |
1711 | .credit_setup = ath6kl_htc_pipe_credit_setup, | |
1712 | .tx_complete = ath6kl_htc_pipe_tx_complete, | |
1713 | .rx_complete = ath6kl_htc_pipe_rx_complete, | |
1714 | }; | |
1715 | ||
1716 | void ath6kl_htc_pipe_attach(struct ath6kl *ar) | |
1717 | { | |
1718 | ar->htc_ops = &ath6kl_htc_pipe_ops; | |
1719 | } |