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1// SPDX-License-Identifier: BSD-3-Clause-Clear2/*3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.4 * Copyright (c) 2021-2022, 2024 Qualcomm Innovation Center, Inc. All rights reserved.5 */6#include <linux/skbuff.h>7#include <linux/ctype.h>8 9#include "debug.h"10#include "hif.h"11 12struct sk_buff *ath12k_htc_alloc_skb(struct ath12k_base *ab, int size)13{14 struct sk_buff *skb;15 16 skb = dev_alloc_skb(size + sizeof(struct ath12k_htc_hdr));17 if (!skb)18 return NULL;19 20 skb_reserve(skb, sizeof(struct ath12k_htc_hdr));21 22 /* FW/HTC requires 4-byte aligned streams */23 if (!IS_ALIGNED((unsigned long)skb->data, 4))24 ath12k_warn(ab, "Unaligned HTC tx skb\n");25 26 return skb;27}28 29static void ath12k_htc_control_tx_complete(struct ath12k_base *ab,30 struct sk_buff *skb)31{32 kfree_skb(skb);33}34 35static struct sk_buff *ath12k_htc_build_tx_ctrl_skb(void)36{37 struct sk_buff *skb;38 struct ath12k_skb_cb *skb_cb;39 40 skb = dev_alloc_skb(ATH12K_HTC_CONTROL_BUFFER_SIZE);41 if (!skb)42 return NULL;43 44 skb_reserve(skb, sizeof(struct ath12k_htc_hdr));45 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4));46 47 skb_cb = ATH12K_SKB_CB(skb);48 memset(skb_cb, 0, sizeof(*skb_cb));49 50 return skb;51}52 53static void ath12k_htc_prepare_tx_skb(struct ath12k_htc_ep *ep,54 struct sk_buff *skb)55{56 struct ath12k_htc_hdr *hdr;57 58 hdr = (struct ath12k_htc_hdr *)skb->data;59 60 memset(hdr, 0, sizeof(*hdr));61 hdr->htc_info = le32_encode_bits(ep->eid, HTC_HDR_ENDPOINTID) |62 le32_encode_bits((skb->len - sizeof(*hdr)),63 HTC_HDR_PAYLOADLEN);64 65 if (ep->tx_credit_flow_enabled)66 hdr->htc_info |= le32_encode_bits(ATH12K_HTC_FLAG_NEED_CREDIT_UPDATE,67 HTC_HDR_FLAGS);68 69 spin_lock_bh(&ep->htc->tx_lock);70 hdr->ctrl_info = le32_encode_bits(ep->seq_no++, HTC_HDR_CONTROLBYTES1);71 spin_unlock_bh(&ep->htc->tx_lock);72}73 74int ath12k_htc_send(struct ath12k_htc *htc,75 enum ath12k_htc_ep_id eid,76 struct sk_buff *skb)77{78 struct ath12k_htc_ep *ep = &htc->endpoint[eid];79 struct ath12k_skb_cb *skb_cb = ATH12K_SKB_CB(skb);80 struct device *dev = htc->ab->dev;81 struct ath12k_base *ab = htc->ab;82 int credits = 0;83 int ret;84 85 if (eid >= ATH12K_HTC_EP_COUNT) {86 ath12k_warn(ab, "Invalid endpoint id: %d\n", eid);87 return -ENOENT;88 }89 90 skb_push(skb, sizeof(struct ath12k_htc_hdr));91 92 if (ep->tx_credit_flow_enabled) {93 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size);94 spin_lock_bh(&htc->tx_lock);95 if (ep->tx_credits < credits) {96 ath12k_dbg(ab, ATH12K_DBG_HTC,97 "htc insufficient credits ep %d required %d available %d\n",98 eid, credits, ep->tx_credits);99 spin_unlock_bh(&htc->tx_lock);100 ret = -EAGAIN;101 goto err_pull;102 }103 ep->tx_credits -= credits;104 ath12k_dbg(ab, ATH12K_DBG_HTC,105 "htc ep %d consumed %d credits (total %d)\n",106 eid, credits, ep->tx_credits);107 spin_unlock_bh(&htc->tx_lock);108 }109 110 ath12k_htc_prepare_tx_skb(ep, skb);111 112 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);113 ret = dma_mapping_error(dev, skb_cb->paddr);114 if (ret) {115 ret = -EIO;116 goto err_credits;117 }118 119 ret = ath12k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid);120 if (ret)121 goto err_unmap;122 123 return 0;124 125err_unmap:126 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);127err_credits:128 if (ep->tx_credit_flow_enabled) {129 spin_lock_bh(&htc->tx_lock);130 ep->tx_credits += credits;131 ath12k_dbg(ab, ATH12K_DBG_HTC,132 "htc ep %d reverted %d credits back (total %d)\n",133 eid, credits, ep->tx_credits);134 spin_unlock_bh(&htc->tx_lock);135 136 if (ep->ep_ops.ep_tx_credits)137 ep->ep_ops.ep_tx_credits(htc->ab);138 }139err_pull:140 skb_pull(skb, sizeof(struct ath12k_htc_hdr));141 return ret;142}143 144static void145ath12k_htc_process_credit_report(struct ath12k_htc *htc,146 const struct ath12k_htc_credit_report *report,147 int len,148 enum ath12k_htc_ep_id eid)149{150 struct ath12k_base *ab = htc->ab;151 struct ath12k_htc_ep *ep;152 int i, n_reports;153 154 if (len % sizeof(*report))155 ath12k_warn(ab, "Uneven credit report len %d", len);156 157 n_reports = len / sizeof(*report);158 159 spin_lock_bh(&htc->tx_lock);160 for (i = 0; i < n_reports; i++, report++) {161 if (report->eid >= ATH12K_HTC_EP_COUNT)162 break;163 164 ep = &htc->endpoint[report->eid];165 ep->tx_credits += report->credits;166 167 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc ep %d got %d credits (total %d)\n",168 report->eid, report->credits, ep->tx_credits);169 170 if (ep->ep_ops.ep_tx_credits) {171 spin_unlock_bh(&htc->tx_lock);172 ep->ep_ops.ep_tx_credits(htc->ab);173 spin_lock_bh(&htc->tx_lock);174 }175 }176 spin_unlock_bh(&htc->tx_lock);177}178 179static int ath12k_htc_process_trailer(struct ath12k_htc *htc,180 u8 *buffer,181 int length,182 enum ath12k_htc_ep_id src_eid)183{184 struct ath12k_base *ab = htc->ab;185 int status = 0;186 struct ath12k_htc_record *record;187 size_t len;188 189 while (length > 0) {190 record = (struct ath12k_htc_record *)buffer;191 192 if (length < sizeof(record->hdr)) {193 status = -EINVAL;194 break;195 }196 197 if (record->hdr.len > length) {198 /* no room left in buffer for record */199 ath12k_warn(ab, "Invalid record length: %d\n",200 record->hdr.len);201 status = -EINVAL;202 break;203 }204 205 switch (record->hdr.id) {206 case ATH12K_HTC_RECORD_CREDITS:207 len = sizeof(struct ath12k_htc_credit_report);208 if (record->hdr.len < len) {209 ath12k_warn(ab, "Credit report too long\n");210 status = -EINVAL;211 break;212 }213 ath12k_htc_process_credit_report(htc,214 record->credit_report,215 record->hdr.len,216 src_eid);217 break;218 default:219 ath12k_warn(ab, "Unhandled record: id:%d length:%d\n",220 record->hdr.id, record->hdr.len);221 break;222 }223 224 if (status)225 break;226 227 /* multiple records may be present in a trailer */228 buffer += sizeof(record->hdr) + record->hdr.len;229 length -= sizeof(record->hdr) + record->hdr.len;230 }231 232 return status;233}234 235static void ath12k_htc_suspend_complete(struct ath12k_base *ab, bool ack)236{237 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot suspend complete %d\n", ack);238 239 if (ack)240 set_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);241 else242 clear_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);243 244 complete(&ab->htc_suspend);245}246 247static void ath12k_htc_wakeup_from_suspend(struct ath12k_base *ab)248{249 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot wakeup from suspend is received\n");250}251 252void ath12k_htc_rx_completion_handler(struct ath12k_base *ab,253 struct sk_buff *skb)254{255 int status = 0;256 struct ath12k_htc *htc = &ab->htc;257 struct ath12k_htc_hdr *hdr;258 struct ath12k_htc_ep *ep;259 u16 payload_len;260 u32 trailer_len = 0;261 size_t min_len;262 u8 eid;263 bool trailer_present;264 265 hdr = (struct ath12k_htc_hdr *)skb->data;266 skb_pull(skb, sizeof(*hdr));267 268 eid = le32_get_bits(hdr->htc_info, HTC_HDR_ENDPOINTID);269 270 if (eid >= ATH12K_HTC_EP_COUNT) {271 ath12k_warn(ab, "HTC Rx: invalid eid %d\n", eid);272 goto out;273 }274 275 ep = &htc->endpoint[eid];276 277 payload_len = le32_get_bits(hdr->htc_info, HTC_HDR_PAYLOADLEN);278 279 if (payload_len + sizeof(*hdr) > ATH12K_HTC_MAX_LEN) {280 ath12k_warn(ab, "HTC rx frame too long, len: %zu\n",281 payload_len + sizeof(*hdr));282 goto out;283 }284 285 if (skb->len < payload_len) {286 ath12k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n",287 skb->len, payload_len);288 goto out;289 }290 291 /* get flags to check for trailer */292 trailer_present = le32_get_bits(hdr->htc_info, HTC_HDR_FLAGS) &293 ATH12K_HTC_FLAG_TRAILER_PRESENT;294 295 if (trailer_present) {296 u8 *trailer;297 298 trailer_len = le32_get_bits(hdr->ctrl_info,299 HTC_HDR_CONTROLBYTES0);300 min_len = sizeof(struct ath12k_htc_record_hdr);301 302 if ((trailer_len < min_len) ||303 (trailer_len > payload_len)) {304 ath12k_warn(ab, "Invalid trailer length: %d\n",305 trailer_len);306 goto out;307 }308 309 trailer = (u8 *)hdr;310 trailer += sizeof(*hdr);311 trailer += payload_len;312 trailer -= trailer_len;313 status = ath12k_htc_process_trailer(htc, trailer,314 trailer_len, eid);315 if (status)316 goto out;317 318 skb_trim(skb, skb->len - trailer_len);319 }320 321 if (trailer_len >= payload_len)322 /* zero length packet with trailer data, just drop these */323 goto out;324 325 if (eid == ATH12K_HTC_EP_0) {326 struct ath12k_htc_msg *msg = (struct ath12k_htc_msg *)skb->data;327 328 switch (le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)) {329 case ATH12K_HTC_MSG_READY_ID:330 case ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID:331 /* handle HTC control message */332 if (completion_done(&htc->ctl_resp)) {333 /* this is a fatal error, target should not be334 * sending unsolicited messages on the ep 0335 */336 ath12k_warn(ab, "HTC rx ctrl still processing\n");337 complete(&htc->ctl_resp);338 goto out;339 }340 341 htc->control_resp_len =342 min_t(int, skb->len,343 ATH12K_HTC_MAX_CTRL_MSG_LEN);344 345 memcpy(htc->control_resp_buffer, skb->data,346 htc->control_resp_len);347 348 complete(&htc->ctl_resp);349 break;350 case ATH12K_HTC_MSG_SEND_SUSPEND_COMPLETE:351 ath12k_htc_suspend_complete(ab, true);352 break;353 case ATH12K_HTC_MSG_NACK_SUSPEND:354 ath12k_htc_suspend_complete(ab, false);355 break;356 case ATH12K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID:357 ath12k_htc_wakeup_from_suspend(ab);358 break;359 default:360 ath12k_warn(ab, "ignoring unsolicited htc ep0 event %u\n",361 le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID));362 break;363 }364 goto out;365 }366 367 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc rx completion ep %d skb %p\n",368 eid, skb);369 ep->ep_ops.ep_rx_complete(ab, skb);370 371 /* poll tx completion for interrupt disabled CE's */372 ath12k_ce_poll_send_completed(ab, ep->ul_pipe_id);373 374 /* skb is now owned by the rx completion handler */375 skb = NULL;376out:377 kfree_skb(skb);378}379 380static void ath12k_htc_control_rx_complete(struct ath12k_base *ab,381 struct sk_buff *skb)382{383 /* This is unexpected. FW is not supposed to send regular rx on this384 * endpoint.385 */386 ath12k_warn(ab, "unexpected htc rx\n");387 kfree_skb(skb);388}389 390static const char *htc_service_name(enum ath12k_htc_svc_id id)391{392 switch (id) {393 case ATH12K_HTC_SVC_ID_RESERVED:394 return "Reserved";395 case ATH12K_HTC_SVC_ID_RSVD_CTRL:396 return "Control";397 case ATH12K_HTC_SVC_ID_WMI_CONTROL:398 return "WMI";399 case ATH12K_HTC_SVC_ID_WMI_DATA_BE:400 return "DATA BE";401 case ATH12K_HTC_SVC_ID_WMI_DATA_BK:402 return "DATA BK";403 case ATH12K_HTC_SVC_ID_WMI_DATA_VI:404 return "DATA VI";405 case ATH12K_HTC_SVC_ID_WMI_DATA_VO:406 return "DATA VO";407 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1:408 return "WMI MAC1";409 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2:410 return "WMI MAC2";411 case ATH12K_HTC_SVC_ID_NMI_CONTROL:412 return "NMI Control";413 case ATH12K_HTC_SVC_ID_NMI_DATA:414 return "NMI Data";415 case ATH12K_HTC_SVC_ID_HTT_DATA_MSG:416 return "HTT Data";417 case ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS:418 return "RAW";419 case ATH12K_HTC_SVC_ID_IPA_TX:420 return "IPA TX";421 case ATH12K_HTC_SVC_ID_PKT_LOG:422 return "PKT LOG";423 case ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG:424 return "WMI DIAG";425 }426 427 return "Unknown";428}429 430static void ath12k_htc_reset_endpoint_states(struct ath12k_htc *htc)431{432 struct ath12k_htc_ep *ep;433 int i;434 435 for (i = ATH12K_HTC_EP_0; i < ATH12K_HTC_EP_COUNT; i++) {436 ep = &htc->endpoint[i];437 ep->service_id = ATH12K_HTC_SVC_ID_UNUSED;438 ep->max_ep_message_len = 0;439 ep->max_tx_queue_depth = 0;440 ep->eid = i;441 ep->htc = htc;442 ep->tx_credit_flow_enabled = true;443 }444}445 446static u8 ath12k_htc_get_credit_allocation(struct ath12k_htc *htc,447 u16 service_id)448{449 struct ath12k_htc_svc_tx_credits *serv_entry;450 u8 i, allocation = 0;451 452 serv_entry = htc->service_alloc_table;453 454 for (i = 0; i < ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) {455 if (serv_entry[i].service_id == service_id) {456 allocation = serv_entry[i].credit_allocation;457 break;458 }459 }460 461 return allocation;462}463 464static int ath12k_htc_setup_target_buffer_assignments(struct ath12k_htc *htc)465{466 struct ath12k_htc_svc_tx_credits *serv_entry;467 static const u32 svc_id[] = {468 ATH12K_HTC_SVC_ID_WMI_CONTROL,469 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1,470 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2,471 };472 int i, credits;473 474 credits = htc->total_transmit_credits;475 serv_entry = htc->service_alloc_table;476 477 if ((htc->wmi_ep_count == 0) ||478 (htc->wmi_ep_count > ARRAY_SIZE(svc_id)))479 return -EINVAL;480 481 /* Divide credits among number of endpoints for WMI */482 credits = credits / htc->wmi_ep_count;483 for (i = 0; i < htc->wmi_ep_count; i++) {484 serv_entry[i].service_id = svc_id[i];485 serv_entry[i].credit_allocation = credits;486 }487 488 return 0;489}490 491int ath12k_htc_wait_target(struct ath12k_htc *htc)492{493 int i, status = 0;494 struct ath12k_base *ab = htc->ab;495 unsigned long time_left;496 struct ath12k_htc_ready *ready;497 u16 message_id;498 u16 credit_count;499 u16 credit_size;500 501 time_left = wait_for_completion_timeout(&htc->ctl_resp,502 ATH12K_HTC_WAIT_TIMEOUT_HZ);503 if (!time_left) {504 ath12k_warn(ab, "failed to receive control response completion, polling..\n");505 506 for (i = 0; i < ab->hw_params->ce_count; i++)507 ath12k_ce_per_engine_service(htc->ab, i);508 509 time_left =510 wait_for_completion_timeout(&htc->ctl_resp,511 ATH12K_HTC_WAIT_TIMEOUT_HZ);512 513 if (!time_left)514 status = -ETIMEDOUT;515 }516 517 if (status < 0) {518 ath12k_warn(ab, "ctl_resp never came in (%d)\n", status);519 return status;520 }521 522 if (htc->control_resp_len < sizeof(*ready)) {523 ath12k_warn(ab, "Invalid HTC ready msg len:%d\n",524 htc->control_resp_len);525 return -ECOMM;526 }527 528 ready = (struct ath12k_htc_ready *)htc->control_resp_buffer;529 message_id = le32_get_bits(ready->id_credit_count, HTC_MSG_MESSAGEID);530 credit_count = le32_get_bits(ready->id_credit_count,531 HTC_READY_MSG_CREDITCOUNT);532 credit_size = le32_get_bits(ready->size_ep, HTC_READY_MSG_CREDITSIZE);533 534 if (message_id != ATH12K_HTC_MSG_READY_ID) {535 ath12k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id);536 return -ECOMM;537 }538 539 htc->total_transmit_credits = credit_count;540 htc->target_credit_size = credit_size;541 542 ath12k_dbg(ab, ATH12K_DBG_HTC,543 "Target ready! transmit resources: %d size:%d\n",544 htc->total_transmit_credits, htc->target_credit_size);545 546 if ((htc->total_transmit_credits == 0) ||547 (htc->target_credit_size == 0)) {548 ath12k_warn(ab, "Invalid credit size received\n");549 return -ECOMM;550 }551 552 ath12k_htc_setup_target_buffer_assignments(htc);553 554 return 0;555}556 557int ath12k_htc_connect_service(struct ath12k_htc *htc,558 struct ath12k_htc_svc_conn_req *conn_req,559 struct ath12k_htc_svc_conn_resp *conn_resp)560{561 struct ath12k_base *ab = htc->ab;562 struct ath12k_htc_conn_svc *req_msg;563 struct ath12k_htc_conn_svc_resp resp_msg_dummy;564 struct ath12k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy;565 enum ath12k_htc_ep_id assigned_eid = ATH12K_HTC_EP_COUNT;566 struct ath12k_htc_ep *ep;567 struct sk_buff *skb;568 unsigned int max_msg_size = 0;569 int length, status;570 unsigned long time_left;571 bool disable_credit_flow_ctrl = false;572 u16 message_id, service_id, flags = 0;573 u8 tx_alloc = 0;574 575 /* special case for HTC pseudo control service */576 if (conn_req->service_id == ATH12K_HTC_SVC_ID_RSVD_CTRL) {577 disable_credit_flow_ctrl = true;578 assigned_eid = ATH12K_HTC_EP_0;579 max_msg_size = ATH12K_HTC_MAX_CTRL_MSG_LEN;580 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy));581 goto setup;582 }583 584 tx_alloc = ath12k_htc_get_credit_allocation(htc,585 conn_req->service_id);586 if (!tx_alloc)587 ath12k_dbg(ab, ATH12K_DBG_BOOT,588 "boot htc service %s does not allocate target credits\n",589 htc_service_name(conn_req->service_id));590 591 skb = ath12k_htc_build_tx_ctrl_skb();592 if (!skb) {593 ath12k_warn(ab, "Failed to allocate HTC packet\n");594 return -ENOMEM;595 }596 597 length = sizeof(*req_msg);598 skb_put(skb, length);599 memset(skb->data, 0, length);600 601 req_msg = (struct ath12k_htc_conn_svc *)skb->data;602 req_msg->msg_svc_id = le32_encode_bits(ATH12K_HTC_MSG_CONNECT_SERVICE_ID,603 HTC_MSG_MESSAGEID);604 605 flags |= u32_encode_bits(tx_alloc, ATH12K_HTC_CONN_FLAGS_RECV_ALLOC);606 607 /* Only enable credit flow control for WMI ctrl service */608 if (!(conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL ||609 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 ||610 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2)) {611 flags |= ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL;612 disable_credit_flow_ctrl = true;613 }614 615 req_msg->flags_len = le32_encode_bits(flags, HTC_SVC_MSG_CONNECTIONFLAGS);616 req_msg->msg_svc_id |= le32_encode_bits(conn_req->service_id,617 HTC_SVC_MSG_SERVICE_ID);618 619 reinit_completion(&htc->ctl_resp);620 621 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb);622 if (status) {623 kfree_skb(skb);624 return status;625 }626 627 /* wait for response */628 time_left = wait_for_completion_timeout(&htc->ctl_resp,629 ATH12K_HTC_CONN_SVC_TIMEOUT_HZ);630 if (!time_left) {631 ath12k_err(ab, "Service connect timeout\n");632 return -ETIMEDOUT;633 }634 635 /* we controlled the buffer creation, it's aligned */636 resp_msg = (struct ath12k_htc_conn_svc_resp *)htc->control_resp_buffer;637 message_id = le32_get_bits(resp_msg->msg_svc_id, HTC_MSG_MESSAGEID);638 service_id = le32_get_bits(resp_msg->msg_svc_id,639 HTC_SVC_RESP_MSG_SERVICEID);640 641 if ((message_id != ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID) ||642 (htc->control_resp_len < sizeof(*resp_msg))) {643 ath12k_err(ab, "Invalid resp message ID 0x%x", message_id);644 return -EPROTO;645 }646 647 ath12k_dbg(ab, ATH12K_DBG_HTC,648 "HTC Service %s connect response: status: %u, assigned ep: %u\n",649 htc_service_name(service_id),650 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_STATUS),651 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_ENDPOINTID));652 653 conn_resp->connect_resp_code = le32_get_bits(resp_msg->flags_len,654 HTC_SVC_RESP_MSG_STATUS);655 656 /* check response status */657 if (conn_resp->connect_resp_code != ATH12K_HTC_CONN_SVC_STATUS_SUCCESS) {658 ath12k_err(ab, "HTC Service %s connect request failed: 0x%x)\n",659 htc_service_name(service_id),660 conn_resp->connect_resp_code);661 return -EPROTO;662 }663 664 assigned_eid = le32_get_bits(resp_msg->flags_len,665 HTC_SVC_RESP_MSG_ENDPOINTID);666 667 max_msg_size = le32_get_bits(resp_msg->flags_len,668 HTC_SVC_RESP_MSG_MAXMSGSIZE);669 670setup:671 672 if (assigned_eid >= ATH12K_HTC_EP_COUNT)673 return -EPROTO;674 675 if (max_msg_size == 0)676 return -EPROTO;677 678 ep = &htc->endpoint[assigned_eid];679 ep->eid = assigned_eid;680 681 if (ep->service_id != ATH12K_HTC_SVC_ID_UNUSED)682 return -EPROTO;683 684 /* return assigned endpoint to caller */685 conn_resp->eid = assigned_eid;686 conn_resp->max_msg_len = le32_get_bits(resp_msg->flags_len,687 HTC_SVC_RESP_MSG_MAXMSGSIZE);688 689 /* setup the endpoint */690 ep->service_id = conn_req->service_id;691 ep->max_tx_queue_depth = conn_req->max_send_queue_depth;692 ep->max_ep_message_len = le32_get_bits(resp_msg->flags_len,693 HTC_SVC_RESP_MSG_MAXMSGSIZE);694 ep->tx_credits = tx_alloc;695 696 /* copy all the callbacks */697 ep->ep_ops = conn_req->ep_ops;698 699 status = ath12k_hif_map_service_to_pipe(htc->ab,700 ep->service_id,701 &ep->ul_pipe_id,702 &ep->dl_pipe_id);703 if (status)704 return status;705 706 ath12k_dbg(ab, ATH12K_DBG_BOOT,707 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n",708 htc_service_name(ep->service_id), ep->ul_pipe_id,709 ep->dl_pipe_id, ep->eid);710 711 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) {712 ep->tx_credit_flow_enabled = false;713 ath12k_dbg(ab, ATH12K_DBG_BOOT,714 "boot htc service '%s' eid %d TX flow control disabled\n",715 htc_service_name(ep->service_id), assigned_eid);716 }717 718 return status;719}720 721int ath12k_htc_start(struct ath12k_htc *htc)722{723 struct sk_buff *skb;724 int status;725 struct ath12k_base *ab = htc->ab;726 struct ath12k_htc_setup_complete_extended *msg;727 728 skb = ath12k_htc_build_tx_ctrl_skb();729 if (!skb)730 return -ENOMEM;731 732 skb_put(skb, sizeof(*msg));733 memset(skb->data, 0, skb->len);734 735 msg = (struct ath12k_htc_setup_complete_extended *)skb->data;736 msg->msg_id = le32_encode_bits(ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID,737 HTC_MSG_MESSAGEID);738 739 ath12k_dbg(ab, ATH12K_DBG_HTC, "HTC is using TX credit flow control\n");740 741 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb);742 if (status) {743 kfree_skb(skb);744 return status;745 }746 747 return 0;748}749 750int ath12k_htc_init(struct ath12k_base *ab)751{752 struct ath12k_htc *htc = &ab->htc;753 struct ath12k_htc_svc_conn_req conn_req = { };754 struct ath12k_htc_svc_conn_resp conn_resp = { };755 int ret;756 757 spin_lock_init(&htc->tx_lock);758 759 ath12k_htc_reset_endpoint_states(htc);760 761 htc->ab = ab;762 763 switch (ab->wmi_ab.preferred_hw_mode) {764 case WMI_HOST_HW_MODE_SINGLE:765 htc->wmi_ep_count = 1;766 break;767 case WMI_HOST_HW_MODE_DBS:768 case WMI_HOST_HW_MODE_DBS_OR_SBS:769 htc->wmi_ep_count = 2;770 break;771 case WMI_HOST_HW_MODE_DBS_SBS:772 htc->wmi_ep_count = 3;773 break;774 default:775 htc->wmi_ep_count = ab->hw_params->max_radios;776 break;777 }778 779 /* setup our pseudo HTC control endpoint connection */780 conn_req.ep_ops.ep_tx_complete = ath12k_htc_control_tx_complete;781 conn_req.ep_ops.ep_rx_complete = ath12k_htc_control_rx_complete;782 conn_req.max_send_queue_depth = ATH12K_NUM_CONTROL_TX_BUFFERS;783 conn_req.service_id = ATH12K_HTC_SVC_ID_RSVD_CTRL;784 785 /* connect fake service */786 ret = ath12k_htc_connect_service(htc, &conn_req, &conn_resp);787 if (ret) {788 ath12k_err(ab, "could not connect to htc service (%d)\n", ret);789 return ret;790 }791 792 init_completion(&htc->ctl_resp);793 794 return 0;795}796