2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 static void ath10k_htc_control_tx_complete(struct ath10k *ar,
32 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
35 struct ath10k_skb_cb *skb_cb;
37 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
41 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
42 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
44 skb_cb = ATH10K_SKB_CB(skb);
45 memset(skb_cb, 0, sizeof(*skb_cb));
47 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb);
51 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
54 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
56 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
57 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
60 void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
63 struct ath10k *ar = ep->htc->ar;
65 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__,
68 ath10k_htc_restore_tx_skb(ep->htc, skb);
70 if (!ep->ep_ops.ep_tx_complete) {
71 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
72 dev_kfree_skb_any(skb);
76 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
78 EXPORT_SYMBOL(ath10k_htc_notify_tx_completion);
80 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
83 struct ath10k_htc_hdr *hdr;
85 hdr = (struct ath10k_htc_hdr *)skb->data;
88 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
90 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
92 spin_lock_bh(&ep->htc->tx_lock);
93 hdr->seq_no = ep->seq_no++;
94 spin_unlock_bh(&ep->htc->tx_lock);
97 int ath10k_htc_send(struct ath10k_htc *htc,
98 enum ath10k_htc_ep_id eid,
101 struct ath10k *ar = htc->ar;
102 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
103 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
104 struct ath10k_hif_sg_item sg_item;
105 struct device *dev = htc->ar->dev;
109 if (htc->ar->state == ATH10K_STATE_WEDGED)
112 if (eid >= ATH10K_HTC_EP_COUNT) {
113 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
117 skb_push(skb, sizeof(struct ath10k_htc_hdr));
119 if (ep->tx_credit_flow_enabled) {
120 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
121 spin_lock_bh(&htc->tx_lock);
122 if (ep->tx_credits < credits) {
123 ath10k_dbg(ar, ATH10K_DBG_HTC,
124 "htc insufficient credits ep %d required %d available %d\n",
125 eid, credits, ep->tx_credits);
126 spin_unlock_bh(&htc->tx_lock);
130 ep->tx_credits -= credits;
131 ath10k_dbg(ar, ATH10K_DBG_HTC,
132 "htc ep %d consumed %d credits (total %d)\n",
133 eid, credits, ep->tx_credits);
134 spin_unlock_bh(&htc->tx_lock);
137 ath10k_htc_prepare_tx_skb(ep, skb);
140 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
141 ret = dma_mapping_error(dev, skb_cb->paddr);
147 sg_item.transfer_id = ep->eid;
148 sg_item.transfer_context = skb;
149 sg_item.vaddr = skb->data;
150 sg_item.paddr = skb_cb->paddr;
151 sg_item.len = skb->len;
153 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
160 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
162 if (ep->tx_credit_flow_enabled) {
163 spin_lock_bh(&htc->tx_lock);
164 ep->tx_credits += credits;
165 ath10k_dbg(ar, ATH10K_DBG_HTC,
166 "htc ep %d reverted %d credits back (total %d)\n",
167 eid, credits, ep->tx_credits);
168 spin_unlock_bh(&htc->tx_lock);
170 if (ep->ep_ops.ep_tx_credits)
171 ep->ep_ops.ep_tx_credits(htc->ar);
174 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
178 void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
180 struct ath10k_htc *htc = &ar->htc;
181 struct ath10k_skb_cb *skb_cb;
182 struct ath10k_htc_ep *ep;
184 if (WARN_ON_ONCE(!skb))
187 skb_cb = ATH10K_SKB_CB(skb);
188 ep = &htc->endpoint[skb_cb->eid];
190 ath10k_htc_notify_tx_completion(ep, skb);
191 /* the skb now belongs to the completion handler */
193 EXPORT_SYMBOL(ath10k_htc_tx_completion_handler);
200 ath10k_htc_process_credit_report(struct ath10k_htc *htc,
201 const struct ath10k_htc_credit_report *report,
203 enum ath10k_htc_ep_id eid)
205 struct ath10k *ar = htc->ar;
206 struct ath10k_htc_ep *ep;
209 if (len % sizeof(*report))
210 ath10k_warn(ar, "Uneven credit report len %d", len);
212 n_reports = len / sizeof(*report);
214 spin_lock_bh(&htc->tx_lock);
215 for (i = 0; i < n_reports; i++, report++) {
216 if (report->eid >= ATH10K_HTC_EP_COUNT)
219 ep = &htc->endpoint[report->eid];
220 ep->tx_credits += report->credits;
222 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
223 report->eid, report->credits, ep->tx_credits);
225 if (ep->ep_ops.ep_tx_credits) {
226 spin_unlock_bh(&htc->tx_lock);
227 ep->ep_ops.ep_tx_credits(htc->ar);
228 spin_lock_bh(&htc->tx_lock);
231 spin_unlock_bh(&htc->tx_lock);
235 ath10k_htc_process_lookahead(struct ath10k_htc *htc,
236 const struct ath10k_htc_lookahead_report *report,
238 enum ath10k_htc_ep_id eid,
239 void *next_lookaheads,
240 int *next_lookaheads_len)
242 struct ath10k *ar = htc->ar;
244 /* Invalid lookahead flags are actually transmitted by
245 * the target in the HTC control message.
246 * Since this will happen at every boot we silently ignore
247 * the lookahead in this case
249 if (report->pre_valid != ((~report->post_valid) & 0xFF))
252 if (next_lookaheads && next_lookaheads_len) {
253 ath10k_dbg(ar, ATH10K_DBG_HTC,
254 "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n",
255 report->pre_valid, report->post_valid);
257 /* look ahead bytes are valid, copy them over */
258 memcpy((u8 *)next_lookaheads, report->lookahead, 4);
260 *next_lookaheads_len = 1;
267 ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc,
268 const struct ath10k_htc_lookahead_bundle *report,
270 enum ath10k_htc_ep_id eid,
271 void *next_lookaheads,
272 int *next_lookaheads_len)
274 struct ath10k *ar = htc->ar;
275 int bundle_cnt = len / sizeof(*report);
277 if (!bundle_cnt || (bundle_cnt > HTC_HOST_MAX_MSG_PER_BUNDLE)) {
278 ath10k_warn(ar, "Invalid lookahead bundle count: %d\n",
283 if (next_lookaheads && next_lookaheads_len) {
286 for (i = 0; i < bundle_cnt; i++) {
287 memcpy(((u8 *)next_lookaheads) + 4 * i,
288 report->lookahead, 4);
292 *next_lookaheads_len = bundle_cnt;
298 int ath10k_htc_process_trailer(struct ath10k_htc *htc,
301 enum ath10k_htc_ep_id src_eid,
302 void *next_lookaheads,
303 int *next_lookaheads_len)
305 struct ath10k_htc_lookahead_bundle *bundle;
306 struct ath10k *ar = htc->ar;
308 struct ath10k_htc_record *record;
313 orig_buffer = buffer;
314 orig_length = length;
317 record = (struct ath10k_htc_record *)buffer;
319 if (length < sizeof(record->hdr)) {
324 if (record->hdr.len > length) {
325 /* no room left in buffer for record */
326 ath10k_warn(ar, "Invalid record length: %d\n",
332 switch (record->hdr.id) {
333 case ATH10K_HTC_RECORD_CREDITS:
334 len = sizeof(struct ath10k_htc_credit_report);
335 if (record->hdr.len < len) {
336 ath10k_warn(ar, "Credit report too long\n");
340 ath10k_htc_process_credit_report(htc,
341 record->credit_report,
345 case ATH10K_HTC_RECORD_LOOKAHEAD:
346 len = sizeof(struct ath10k_htc_lookahead_report);
347 if (record->hdr.len < len) {
348 ath10k_warn(ar, "Lookahead report too long\n");
352 status = ath10k_htc_process_lookahead(htc,
353 record->lookahead_report,
357 next_lookaheads_len);
359 case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE:
360 bundle = record->lookahead_bundle;
361 status = ath10k_htc_process_lookahead_bundle(htc,
366 next_lookaheads_len);
369 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
370 record->hdr.id, record->hdr.len);
377 /* multiple records may be present in a trailer */
378 buffer += sizeof(record->hdr) + record->hdr.len;
379 length -= sizeof(record->hdr) + record->hdr.len;
383 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
384 orig_buffer, orig_length);
388 EXPORT_SYMBOL(ath10k_htc_process_trailer);
390 void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb)
393 struct ath10k_htc *htc = &ar->htc;
394 struct ath10k_htc_hdr *hdr;
395 struct ath10k_htc_ep *ep;
400 bool trailer_present;
402 hdr = (struct ath10k_htc_hdr *)skb->data;
403 skb_pull(skb, sizeof(*hdr));
407 if (eid >= ATH10K_HTC_EP_COUNT) {
408 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
409 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
414 ep = &htc->endpoint[eid];
416 payload_len = __le16_to_cpu(hdr->len);
418 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
419 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
420 payload_len + sizeof(*hdr));
421 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
426 if (skb->len < payload_len) {
427 ath10k_dbg(ar, ATH10K_DBG_HTC,
428 "HTC Rx: insufficient length, got %d, expected %d\n",
429 skb->len, payload_len);
430 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
431 "", hdr, sizeof(*hdr));
435 /* get flags to check for trailer */
436 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
437 if (trailer_present) {
440 trailer_len = hdr->trailer_len;
441 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
443 if ((trailer_len < min_len) ||
444 (trailer_len > payload_len)) {
445 ath10k_warn(ar, "Invalid trailer length: %d\n",
451 trailer += sizeof(*hdr);
452 trailer += payload_len;
453 trailer -= trailer_len;
454 status = ath10k_htc_process_trailer(htc, trailer,
455 trailer_len, hdr->eid,
460 skb_trim(skb, skb->len - trailer_len);
463 if (((int)payload_len - (int)trailer_len) <= 0)
464 /* zero length packet with trailer data, just drop these */
467 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n",
469 ep->ep_ops.ep_rx_complete(ar, skb);
471 /* skb is now owned by the rx completion handler */
476 EXPORT_SYMBOL(ath10k_htc_rx_completion_handler);
478 static void ath10k_htc_control_rx_complete(struct ath10k *ar,
481 struct ath10k_htc *htc = &ar->htc;
482 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
484 switch (__le16_to_cpu(msg->hdr.message_id)) {
485 case ATH10K_HTC_MSG_READY_ID:
486 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
487 /* handle HTC control message */
488 if (completion_done(&htc->ctl_resp)) {
489 /* this is a fatal error, target should not be
490 * sending unsolicited messages on the ep 0
492 ath10k_warn(ar, "HTC rx ctrl still processing\n");
493 complete(&htc->ctl_resp);
497 htc->control_resp_len =
499 ATH10K_HTC_MAX_CTRL_MSG_LEN);
501 memcpy(htc->control_resp_buffer, skb->data,
502 htc->control_resp_len);
504 complete(&htc->ctl_resp);
506 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
507 htc->htc_ops.target_send_suspend_complete(ar);
510 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
522 static const char *htc_service_name(enum ath10k_htc_svc_id id)
525 case ATH10K_HTC_SVC_ID_RESERVED:
527 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
529 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
531 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
533 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
535 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
537 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
539 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
540 return "NMI Control";
541 case ATH10K_HTC_SVC_ID_NMI_DATA:
543 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
545 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
552 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
554 struct ath10k_htc_ep *ep;
557 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
558 ep = &htc->endpoint[i];
559 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
560 ep->max_ep_message_len = 0;
561 ep->max_tx_queue_depth = 0;
564 ep->tx_credit_flow_enabled = true;
568 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
573 /* The WMI control service is the only service with flow control.
574 * Let it have all transmit credits.
576 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL)
577 allocation = htc->total_transmit_credits;
582 int ath10k_htc_wait_target(struct ath10k_htc *htc)
584 struct ath10k *ar = htc->ar;
586 unsigned long time_left;
587 struct ath10k_htc_msg *msg;
590 time_left = wait_for_completion_timeout(&htc->ctl_resp,
591 ATH10K_HTC_WAIT_TIMEOUT_HZ);
593 /* Workaround: In some cases the PCI HIF doesn't
594 * receive interrupt for the control response message
595 * even if the buffer was completed. It is suspected
596 * iomap writes unmasking PCI CE irqs aren't propagated
597 * properly in KVM PCI-passthrough sometimes.
599 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
601 for (i = 0; i < CE_COUNT; i++)
602 ath10k_hif_send_complete_check(htc->ar, i, 1);
605 wait_for_completion_timeout(&htc->ctl_resp,
606 ATH10K_HTC_WAIT_TIMEOUT_HZ);
613 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
617 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
618 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
619 htc->control_resp_len);
623 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
624 message_id = __le16_to_cpu(msg->hdr.message_id);
626 if (message_id != ATH10K_HTC_MSG_READY_ID) {
627 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
631 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
632 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
634 ath10k_dbg(ar, ATH10K_DBG_HTC,
635 "Target ready! transmit resources: %d size:%d\n",
636 htc->total_transmit_credits,
637 htc->target_credit_size);
639 if ((htc->total_transmit_credits == 0) ||
640 (htc->target_credit_size == 0)) {
641 ath10k_err(ar, "Invalid credit size received\n");
645 /* The only way to determine if the ready message is an extended
646 * message is from the size.
648 if (htc->control_resp_len >=
649 sizeof(msg->hdr) + sizeof(msg->ready_ext)) {
650 htc->max_msgs_per_htc_bundle =
651 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle,
652 HTC_HOST_MAX_MSG_PER_BUNDLE);
653 ath10k_dbg(ar, ATH10K_DBG_HTC,
654 "Extended ready message. RX bundle size: %d\n",
655 htc->max_msgs_per_htc_bundle);
661 int ath10k_htc_connect_service(struct ath10k_htc *htc,
662 struct ath10k_htc_svc_conn_req *conn_req,
663 struct ath10k_htc_svc_conn_resp *conn_resp)
665 struct ath10k *ar = htc->ar;
666 struct ath10k_htc_msg *msg;
667 struct ath10k_htc_conn_svc *req_msg;
668 struct ath10k_htc_conn_svc_response resp_msg_dummy;
669 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
670 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
671 struct ath10k_htc_ep *ep;
673 unsigned int max_msg_size = 0;
675 unsigned long time_left;
676 bool disable_credit_flow_ctrl = false;
677 u16 message_id, service_id, flags = 0;
680 /* special case for HTC pseudo control service */
681 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
682 disable_credit_flow_ctrl = true;
683 assigned_eid = ATH10K_HTC_EP_0;
684 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
685 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
689 tx_alloc = ath10k_htc_get_credit_allocation(htc,
690 conn_req->service_id);
692 ath10k_dbg(ar, ATH10K_DBG_BOOT,
693 "boot htc service %s does not allocate target credits\n",
694 htc_service_name(conn_req->service_id));
696 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
698 ath10k_err(ar, "Failed to allocate HTC packet\n");
702 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
703 skb_put(skb, length);
704 memset(skb->data, 0, length);
706 msg = (struct ath10k_htc_msg *)skb->data;
707 msg->hdr.message_id =
708 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
710 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
712 /* Only enable credit flow control for WMI ctrl service */
713 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
714 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
715 disable_credit_flow_ctrl = true;
718 req_msg = &msg->connect_service;
719 req_msg->flags = __cpu_to_le16(flags);
720 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
722 reinit_completion(&htc->ctl_resp);
724 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
730 /* wait for response */
731 time_left = wait_for_completion_timeout(&htc->ctl_resp,
732 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
734 ath10k_err(ar, "Service connect timeout\n");
738 /* we controlled the buffer creation, it's aligned */
739 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
740 resp_msg = &msg->connect_service_response;
741 message_id = __le16_to_cpu(msg->hdr.message_id);
742 service_id = __le16_to_cpu(resp_msg->service_id);
744 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
745 (htc->control_resp_len < sizeof(msg->hdr) +
746 sizeof(msg->connect_service_response))) {
747 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
751 ath10k_dbg(ar, ATH10K_DBG_HTC,
752 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
753 htc_service_name(service_id),
754 resp_msg->status, resp_msg->eid);
756 conn_resp->connect_resp_code = resp_msg->status;
758 /* check response status */
759 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
760 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
761 htc_service_name(service_id),
766 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
767 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
771 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
774 if (max_msg_size == 0)
777 ep = &htc->endpoint[assigned_eid];
778 ep->eid = assigned_eid;
780 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
783 /* return assigned endpoint to caller */
784 conn_resp->eid = assigned_eid;
785 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
787 /* setup the endpoint */
788 ep->service_id = conn_req->service_id;
789 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
790 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
791 ep->tx_credits = tx_alloc;
793 /* copy all the callbacks */
794 ep->ep_ops = conn_req->ep_ops;
796 status = ath10k_hif_map_service_to_pipe(htc->ar,
803 ath10k_dbg(ar, ATH10K_DBG_BOOT,
804 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
805 htc_service_name(ep->service_id), ep->ul_pipe_id,
806 ep->dl_pipe_id, ep->eid);
808 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
809 ep->tx_credit_flow_enabled = false;
810 ath10k_dbg(ar, ATH10K_DBG_BOOT,
811 "boot htc service '%s' eid %d TX flow control disabled\n",
812 htc_service_name(ep->service_id), assigned_eid);
818 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
822 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
826 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
828 /* FW/HTC requires 4-byte aligned streams */
829 if (!IS_ALIGNED((unsigned long)skb->data, 4))
830 ath10k_warn(ar, "Unaligned HTC tx skb\n");
835 int ath10k_htc_start(struct ath10k_htc *htc)
837 struct ath10k *ar = htc->ar;
840 struct ath10k_htc_msg *msg;
842 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
846 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
847 memset(skb->data, 0, skb->len);
849 msg = (struct ath10k_htc_msg *)skb->data;
850 msg->hdr.message_id =
851 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
853 if (ar->hif.bus == ATH10K_BUS_SDIO) {
854 /* Extra setup params used by SDIO */
855 msg->setup_complete_ext.flags =
856 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN);
857 msg->setup_complete_ext.max_msgs_per_bundled_recv =
858 htc->max_msgs_per_htc_bundle;
860 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
862 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
871 /* registered target arrival callback from the HIF layer */
872 int ath10k_htc_init(struct ath10k *ar)
875 struct ath10k_htc *htc = &ar->htc;
876 struct ath10k_htc_svc_conn_req conn_req;
877 struct ath10k_htc_svc_conn_resp conn_resp;
879 spin_lock_init(&htc->tx_lock);
881 ath10k_htc_reset_endpoint_states(htc);
885 /* setup our pseudo HTC control endpoint connection */
886 memset(&conn_req, 0, sizeof(conn_req));
887 memset(&conn_resp, 0, sizeof(conn_resp));
888 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
889 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
890 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
891 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
893 /* connect fake service */
894 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
896 ath10k_err(ar, "could not connect to htc service (%d)\n",
901 init_completion(&htc->ctl_resp);