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 inline void ath10k_htc_send_complete_check(struct ath10k_htc_ep *ep,
30 * Check whether HIF has any prior sends that have finished,
31 * have not had the post-processing done.
33 ath10k_hif_send_complete_check(ep->htc->ar, ep->ul_pipe_id, force);
36 static void ath10k_htc_control_tx_complete(struct ath10k *ar,
42 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
45 struct ath10k_skb_cb *skb_cb;
47 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE);
51 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */
52 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
54 skb_cb = ATH10K_SKB_CB(skb);
55 memset(skb_cb, 0, sizeof(*skb_cb));
57 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %p\n", __func__, skb);
61 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
64 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
66 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
67 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
70 static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
73 struct ath10k *ar = ep->htc->ar;
75 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__,
78 ath10k_htc_restore_tx_skb(ep->htc, skb);
80 if (!ep->ep_ops.ep_tx_complete) {
81 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid);
82 dev_kfree_skb_any(skb);
86 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb);
89 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
92 struct ath10k_htc_hdr *hdr;
94 hdr = (struct ath10k_htc_hdr *)skb->data;
97 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
99 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
101 spin_lock_bh(&ep->htc->tx_lock);
102 hdr->seq_no = ep->seq_no++;
103 spin_unlock_bh(&ep->htc->tx_lock);
106 int ath10k_htc_send(struct ath10k_htc *htc,
107 enum ath10k_htc_ep_id eid,
110 struct ath10k *ar = htc->ar;
111 struct ath10k_htc_ep *ep = &htc->endpoint[eid];
112 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
113 struct ath10k_hif_sg_item sg_item;
114 struct device *dev = htc->ar->dev;
118 if (htc->ar->state == ATH10K_STATE_WEDGED)
121 if (eid >= ATH10K_HTC_EP_COUNT) {
122 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid);
126 skb_push(skb, sizeof(struct ath10k_htc_hdr));
128 if (ep->tx_credit_flow_enabled) {
129 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);
130 spin_lock_bh(&htc->tx_lock);
131 if (ep->tx_credits < credits) {
132 spin_unlock_bh(&htc->tx_lock);
136 ep->tx_credits -= credits;
137 ath10k_dbg(ar, ATH10K_DBG_HTC,
138 "htc ep %d consumed %d credits (total %d)\n",
139 eid, credits, ep->tx_credits);
140 spin_unlock_bh(&htc->tx_lock);
143 ath10k_htc_prepare_tx_skb(ep, skb);
146 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
147 ret = dma_mapping_error(dev, skb_cb->paddr);
153 sg_item.transfer_id = ep->eid;
154 sg_item.transfer_context = skb;
155 sg_item.vaddr = skb->data;
156 sg_item.paddr = skb_cb->paddr;
157 sg_item.len = skb->len;
159 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
166 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
168 if (ep->tx_credit_flow_enabled) {
169 spin_lock_bh(&htc->tx_lock);
170 ep->tx_credits += credits;
171 ath10k_dbg(ar, ATH10K_DBG_HTC,
172 "htc ep %d reverted %d credits back (total %d)\n",
173 eid, credits, ep->tx_credits);
174 spin_unlock_bh(&htc->tx_lock);
176 if (ep->ep_ops.ep_tx_credits)
177 ep->ep_ops.ep_tx_credits(htc->ar);
180 skb_pull(skb, sizeof(struct ath10k_htc_hdr));
184 static int ath10k_htc_tx_completion_handler(struct ath10k *ar,
187 struct ath10k_htc *htc = &ar->htc;
188 struct ath10k_skb_cb *skb_cb;
189 struct ath10k_htc_ep *ep;
191 if (WARN_ON_ONCE(!skb))
194 skb_cb = ATH10K_SKB_CB(skb);
195 ep = &htc->endpoint[skb_cb->eid];
197 ath10k_htc_notify_tx_completion(ep, skb);
198 /* the skb now belongs to the completion handler */
208 ath10k_htc_process_credit_report(struct ath10k_htc *htc,
209 const struct ath10k_htc_credit_report *report,
211 enum ath10k_htc_ep_id eid)
213 struct ath10k *ar = htc->ar;
214 struct ath10k_htc_ep *ep;
217 if (len % sizeof(*report))
218 ath10k_warn(ar, "Uneven credit report len %d", len);
220 n_reports = len / sizeof(*report);
222 spin_lock_bh(&htc->tx_lock);
223 for (i = 0; i < n_reports; i++, report++) {
224 if (report->eid >= ATH10K_HTC_EP_COUNT)
227 ep = &htc->endpoint[report->eid];
228 ep->tx_credits += report->credits;
230 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",
231 report->eid, report->credits, ep->tx_credits);
233 if (ep->ep_ops.ep_tx_credits) {
234 spin_unlock_bh(&htc->tx_lock);
235 ep->ep_ops.ep_tx_credits(htc->ar);
236 spin_lock_bh(&htc->tx_lock);
239 spin_unlock_bh(&htc->tx_lock);
242 static int ath10k_htc_process_trailer(struct ath10k_htc *htc,
245 enum ath10k_htc_ep_id src_eid)
247 struct ath10k *ar = htc->ar;
249 struct ath10k_htc_record *record;
254 orig_buffer = buffer;
255 orig_length = length;
258 record = (struct ath10k_htc_record *)buffer;
260 if (length < sizeof(record->hdr)) {
265 if (record->hdr.len > length) {
266 /* no room left in buffer for record */
267 ath10k_warn(ar, "Invalid record length: %d\n",
273 switch (record->hdr.id) {
274 case ATH10K_HTC_RECORD_CREDITS:
275 len = sizeof(struct ath10k_htc_credit_report);
276 if (record->hdr.len < len) {
277 ath10k_warn(ar, "Credit report too long\n");
281 ath10k_htc_process_credit_report(htc,
282 record->credit_report,
287 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n",
288 record->hdr.id, record->hdr.len);
295 /* multiple records may be present in a trailer */
296 buffer += sizeof(record->hdr) + record->hdr.len;
297 length -= sizeof(record->hdr) + record->hdr.len;
301 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "",
302 orig_buffer, orig_length);
307 static int ath10k_htc_rx_completion_handler(struct ath10k *ar,
311 struct ath10k_htc *htc = &ar->htc;
312 struct ath10k_htc_hdr *hdr;
313 struct ath10k_htc_ep *ep;
318 bool trailer_present;
320 hdr = (struct ath10k_htc_hdr *)skb->data;
321 skb_pull(skb, sizeof(*hdr));
325 if (eid >= ATH10K_HTC_EP_COUNT) {
326 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid);
327 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "",
333 ep = &htc->endpoint[eid];
336 * If this endpoint that received a message from the target has
337 * a to-target HIF pipe whose send completions are polled rather
338 * than interrupt-driven, this is a good point to ask HIF to check
339 * whether it has any completed sends to handle.
341 if (ep->ul_is_polled)
342 ath10k_htc_send_complete_check(ep, 1);
344 payload_len = __le16_to_cpu(hdr->len);
346 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) {
347 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n",
348 payload_len + sizeof(*hdr));
349 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "",
355 if (skb->len < payload_len) {
356 ath10k_dbg(ar, ATH10K_DBG_HTC,
357 "HTC Rx: insufficient length, got %d, expected %d\n",
358 skb->len, payload_len);
359 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len",
360 "", hdr, sizeof(*hdr));
365 /* get flags to check for trailer */
366 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
367 if (trailer_present) {
370 trailer_len = hdr->trailer_len;
371 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr);
373 if ((trailer_len < min_len) ||
374 (trailer_len > payload_len)) {
375 ath10k_warn(ar, "Invalid trailer length: %d\n",
382 trailer += sizeof(*hdr);
383 trailer += payload_len;
384 trailer -= trailer_len;
385 status = ath10k_htc_process_trailer(htc, trailer,
386 trailer_len, hdr->eid);
390 skb_trim(skb, skb->len - trailer_len);
393 if (((int)payload_len - (int)trailer_len) <= 0)
394 /* zero length packet with trailer data, just drop these */
397 if (eid == ATH10K_HTC_EP_0) {
398 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data;
400 switch (__le16_to_cpu(msg->hdr.message_id)) {
401 case ATH10K_HTC_MSG_READY_ID:
402 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID:
403 /* handle HTC control message */
404 if (completion_done(&htc->ctl_resp)) {
406 * this is a fatal error, target should not be
407 * sending unsolicited messages on the ep 0
409 ath10k_warn(ar, "HTC rx ctrl still processing\n");
411 complete(&htc->ctl_resp);
415 htc->control_resp_len =
417 ATH10K_HTC_MAX_CTRL_MSG_LEN);
419 memcpy(htc->control_resp_buffer, skb->data,
420 htc->control_resp_len);
422 complete(&htc->ctl_resp);
424 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE:
425 htc->htc_ops.target_send_suspend_complete(ar);
428 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n");
434 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n",
436 ep->ep_ops.ep_rx_complete(ar, skb);
438 /* skb is now owned by the rx completion handler */
446 static void ath10k_htc_control_rx_complete(struct ath10k *ar,
449 /* This is unexpected. FW is not supposed to send regular rx on this
451 ath10k_warn(ar, "unexpected htc rx\n");
459 static const char *htc_service_name(enum ath10k_htc_svc_id id)
462 case ATH10K_HTC_SVC_ID_RESERVED:
464 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
466 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
468 case ATH10K_HTC_SVC_ID_WMI_DATA_BE:
470 case ATH10K_HTC_SVC_ID_WMI_DATA_BK:
472 case ATH10K_HTC_SVC_ID_WMI_DATA_VI:
474 case ATH10K_HTC_SVC_ID_WMI_DATA_VO:
476 case ATH10K_HTC_SVC_ID_NMI_CONTROL:
477 return "NMI Control";
478 case ATH10K_HTC_SVC_ID_NMI_DATA:
480 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
482 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS:
489 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc)
491 struct ath10k_htc_ep *ep;
494 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) {
495 ep = &htc->endpoint[i];
496 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED;
497 ep->max_ep_message_len = 0;
498 ep->max_tx_queue_depth = 0;
501 ep->tx_credit_flow_enabled = true;
505 static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc)
507 struct ath10k_htc_svc_tx_credits *entry;
509 entry = &htc->service_tx_alloc[0];
512 * for PCIE allocate all credists/HTC buffers to WMI.
513 * no buffers are used/required for data. data always
517 entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL;
518 entry->credit_allocation = htc->total_transmit_credits;
521 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc,
527 for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) {
528 if (htc->service_tx_alloc[i].service_id == service_id)
530 htc->service_tx_alloc[i].credit_allocation;
536 int ath10k_htc_wait_target(struct ath10k_htc *htc)
538 struct ath10k *ar = htc->ar;
540 unsigned long time_left;
541 struct ath10k_htc_svc_conn_req conn_req;
542 struct ath10k_htc_svc_conn_resp conn_resp;
543 struct ath10k_htc_msg *msg;
548 time_left = wait_for_completion_timeout(&htc->ctl_resp,
549 ATH10K_HTC_WAIT_TIMEOUT_HZ);
551 /* Workaround: In some cases the PCI HIF doesn't
552 * receive interrupt for the control response message
553 * even if the buffer was completed. It is suspected
554 * iomap writes unmasking PCI CE irqs aren't propagated
555 * properly in KVM PCI-passthrough sometimes.
557 ath10k_warn(ar, "failed to receive control response completion, polling..\n");
559 for (i = 0; i < CE_COUNT; i++)
560 ath10k_hif_send_complete_check(htc->ar, i, 1);
563 wait_for_completion_timeout(&htc->ctl_resp,
564 ATH10K_HTC_WAIT_TIMEOUT_HZ);
571 ath10k_err(ar, "ctl_resp never came in (%d)\n", status);
575 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) {
576 ath10k_err(ar, "Invalid HTC ready msg len:%d\n",
577 htc->control_resp_len);
581 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
582 message_id = __le16_to_cpu(msg->hdr.message_id);
583 credit_count = __le16_to_cpu(msg->ready.credit_count);
584 credit_size = __le16_to_cpu(msg->ready.credit_size);
586 if (message_id != ATH10K_HTC_MSG_READY_ID) {
587 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id);
591 htc->total_transmit_credits = credit_count;
592 htc->target_credit_size = credit_size;
594 ath10k_dbg(ar, ATH10K_DBG_HTC,
595 "Target ready! transmit resources: %d size:%d\n",
596 htc->total_transmit_credits,
597 htc->target_credit_size);
599 if ((htc->total_transmit_credits == 0) ||
600 (htc->target_credit_size == 0)) {
601 ath10k_err(ar, "Invalid credit size received\n");
605 ath10k_htc_setup_target_buffer_assignments(htc);
607 /* setup our pseudo HTC control endpoint connection */
608 memset(&conn_req, 0, sizeof(conn_req));
609 memset(&conn_resp, 0, sizeof(conn_resp));
610 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete;
611 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete;
612 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS;
613 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL;
615 /* connect fake service */
616 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp);
618 ath10k_err(ar, "could not connect to htc service (%d)\n",
626 int ath10k_htc_connect_service(struct ath10k_htc *htc,
627 struct ath10k_htc_svc_conn_req *conn_req,
628 struct ath10k_htc_svc_conn_resp *conn_resp)
630 struct ath10k *ar = htc->ar;
631 struct ath10k_htc_msg *msg;
632 struct ath10k_htc_conn_svc *req_msg;
633 struct ath10k_htc_conn_svc_response resp_msg_dummy;
634 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy;
635 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT;
636 struct ath10k_htc_ep *ep;
638 unsigned int max_msg_size = 0;
640 unsigned long time_left;
641 bool disable_credit_flow_ctrl = false;
642 u16 message_id, service_id, flags = 0;
645 /* special case for HTC pseudo control service */
646 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) {
647 disable_credit_flow_ctrl = true;
648 assigned_eid = ATH10K_HTC_EP_0;
649 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN;
650 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));
654 tx_alloc = ath10k_htc_get_credit_allocation(htc,
655 conn_req->service_id);
657 ath10k_dbg(ar, ATH10K_DBG_BOOT,
658 "boot htc service %s does not allocate target credits\n",
659 htc_service_name(conn_req->service_id));
661 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
663 ath10k_err(ar, "Failed to allocate HTC packet\n");
667 length = sizeof(msg->hdr) + sizeof(msg->connect_service);
668 skb_put(skb, length);
669 memset(skb->data, 0, length);
671 msg = (struct ath10k_htc_msg *)skb->data;
672 msg->hdr.message_id =
673 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID);
675 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC);
677 /* Only enable credit flow control for WMI ctrl service */
678 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) {
679 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;
680 disable_credit_flow_ctrl = true;
683 req_msg = &msg->connect_service;
684 req_msg->flags = __cpu_to_le16(flags);
685 req_msg->service_id = __cpu_to_le16(conn_req->service_id);
687 reinit_completion(&htc->ctl_resp);
689 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
695 /* wait for response */
696 time_left = wait_for_completion_timeout(&htc->ctl_resp,
697 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ);
699 ath10k_err(ar, "Service connect timeout\n");
703 /* we controlled the buffer creation, it's aligned */
704 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer;
705 resp_msg = &msg->connect_service_response;
706 message_id = __le16_to_cpu(msg->hdr.message_id);
707 service_id = __le16_to_cpu(resp_msg->service_id);
709 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||
710 (htc->control_resp_len < sizeof(msg->hdr) +
711 sizeof(msg->connect_service_response))) {
712 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id);
716 ath10k_dbg(ar, ATH10K_DBG_HTC,
717 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n",
718 htc_service_name(service_id),
719 resp_msg->status, resp_msg->eid);
721 conn_resp->connect_resp_code = resp_msg->status;
723 /* check response status */
724 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) {
725 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n",
726 htc_service_name(service_id),
731 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid;
732 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size);
736 if (assigned_eid >= ATH10K_HTC_EP_COUNT)
739 if (max_msg_size == 0)
742 ep = &htc->endpoint[assigned_eid];
743 ep->eid = assigned_eid;
745 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED)
748 /* return assigned endpoint to caller */
749 conn_resp->eid = assigned_eid;
750 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size);
752 /* setup the endpoint */
753 ep->service_id = conn_req->service_id;
754 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;
755 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size);
756 ep->tx_credits = tx_alloc;
757 ep->tx_credit_size = htc->target_credit_size;
758 ep->tx_credits_per_max_message = ep->max_ep_message_len /
759 htc->target_credit_size;
761 if (ep->max_ep_message_len % htc->target_credit_size)
762 ep->tx_credits_per_max_message++;
764 /* copy all the callbacks */
765 ep->ep_ops = conn_req->ep_ops;
767 status = ath10k_hif_map_service_to_pipe(htc->ar,
776 ath10k_dbg(ar, ATH10K_DBG_BOOT,
777 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",
778 htc_service_name(ep->service_id), ep->ul_pipe_id,
779 ep->dl_pipe_id, ep->eid);
781 ath10k_dbg(ar, ATH10K_DBG_BOOT,
782 "boot htc ep %d ul polled %d dl polled %d\n",
783 ep->eid, ep->ul_is_polled, ep->dl_is_polled);
785 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {
786 ep->tx_credit_flow_enabled = false;
787 ath10k_dbg(ar, ATH10K_DBG_BOOT,
788 "boot htc service '%s' eid %d TX flow control disabled\n",
789 htc_service_name(ep->service_id), assigned_eid);
795 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size)
799 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr));
803 skb_reserve(skb, sizeof(struct ath10k_htc_hdr));
805 /* FW/HTC requires 4-byte aligned streams */
806 if (!IS_ALIGNED((unsigned long)skb->data, 4))
807 ath10k_warn(ar, "Unaligned HTC tx skb\n");
812 int ath10k_htc_start(struct ath10k_htc *htc)
814 struct ath10k *ar = htc->ar;
817 struct ath10k_htc_msg *msg;
819 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar);
823 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext));
824 memset(skb->data, 0, skb->len);
826 msg = (struct ath10k_htc_msg *)skb->data;
827 msg->hdr.message_id =
828 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID);
830 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n");
832 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb);
841 /* registered target arrival callback from the HIF layer */
842 int ath10k_htc_init(struct ath10k *ar)
844 struct ath10k_hif_cb htc_callbacks;
845 struct ath10k_htc_ep *ep = NULL;
846 struct ath10k_htc *htc = &ar->htc;
848 spin_lock_init(&htc->tx_lock);
850 ath10k_htc_reset_endpoint_states(htc);
852 /* setup HIF layer callbacks */
853 htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler;
854 htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler;
857 /* Get HIF default pipe for HTC message exchange */
858 ep = &htc->endpoint[ATH10K_HTC_EP_0];
860 ath10k_hif_set_callbacks(ar, &htc_callbacks);
861 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id);
863 init_completion(&htc->ctl_resp);