1// SPDX-License-Identifier: BSD-3-Clause-Clear 2/* 3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. 4 */ 5#include <linux/skbuff.h> 6#include <linux/ctype.h> 7 8#include "debug.h" 9#include "hif.h" 10 11struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ab, int size) 12{ 13 struct sk_buff *skb; 14 15 skb = dev_alloc_skb(size + sizeof(struct ath11k_htc_hdr)); 16 if (!skb) 17 return NULL; 18 19 skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); 20 21 /* FW/HTC requires 4-byte aligned streams */ 22 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 23 ath11k_warn(ab, "Unaligned HTC tx skb\n"); 24 25 return skb; 26} 27 28static void ath11k_htc_control_tx_complete(struct ath11k_base *ab, 29 struct sk_buff *skb) 30{ 31 kfree_skb(skb); 32} 33 34static struct sk_buff *ath11k_htc_build_tx_ctrl_skb(void *ab) 35{ 36 struct sk_buff *skb; 37 struct ath11k_skb_cb *skb_cb; 38 39 skb = dev_alloc_skb(ATH11K_HTC_CONTROL_BUFFER_SIZE); 40 if (!skb) 41 return NULL; 42 43 skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); 44 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4)); 45 46 skb_cb = ATH11K_SKB_CB(skb); 47 memset(skb_cb, 0, sizeof(*skb_cb)); 48 49 ath11k_dbg(ab, ATH11K_DBG_HTC, "%s: skb %pK\n", __func__, skb); 50 return skb; 51} 52 53static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep, 54 struct sk_buff *skb) 55{ 56 struct ath11k_htc_hdr *hdr; 57 58 hdr = (struct ath11k_htc_hdr *)skb->data; 59 60 memset(hdr, 0, sizeof(*hdr)); 61 hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) | 62 FIELD_PREP(HTC_HDR_PAYLOADLEN, 63 (skb->len - sizeof(*hdr))) | 64 FIELD_PREP(HTC_HDR_FLAGS, 65 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE); 66 67 spin_lock_bh(&ep->htc->tx_lock); 68 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++); 69 spin_unlock_bh(&ep->htc->tx_lock); 70} 71 72int ath11k_htc_send(struct ath11k_htc *htc, 73 enum ath11k_htc_ep_id eid, 74 struct sk_buff *skb) 75{ 76 struct ath11k_htc_ep *ep = &htc->endpoint[eid]; 77 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); 78 struct device *dev = htc->ab->dev; 79 struct ath11k_base *ab = htc->ab; 80 int credits = 0; 81 int ret; 82 83 if (eid >= ATH11K_HTC_EP_COUNT) { 84 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); 85 return -ENOENT; 86 } 87 88 skb_push(skb, sizeof(struct ath11k_htc_hdr)); 89 90 if (ep->tx_credit_flow_enabled) { 91 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 92 spin_lock_bh(&htc->tx_lock); 93 if (ep->tx_credits < credits) { 94 ath11k_dbg(ab, ATH11K_DBG_HTC, 95 "htc insufficient credits ep %d required %d available %d\n", 96 eid, credits, ep->tx_credits); 97 spin_unlock_bh(&htc->tx_lock); 98 ret = -EAGAIN; 99 goto err_pull; 100 } 101 ep->tx_credits -= credits; 102 ath11k_dbg(ab, ATH11K_DBG_HTC, 103 "htc ep %d consumed %d credits (total %d)\n", 104 eid, credits, ep->tx_credits); 105 spin_unlock_bh(&htc->tx_lock); 106 } 107 108 ath11k_htc_prepare_tx_skb(ep, skb); 109 110 skb_cb->eid = eid; 111 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 112 ret = dma_mapping_error(dev, skb_cb->paddr); 113 if (ret) { 114 ret = -EIO; 115 goto err_credits; 116 } 117 118 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 119 if (ret) 120 goto err_unmap; 121 122 return 0; 123 124err_unmap: 125 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 126err_credits: 127 if (ep->tx_credit_flow_enabled) { 128 spin_lock_bh(&htc->tx_lock); 129 ep->tx_credits += credits; 130 ath11k_dbg(ab, ATH11K_DBG_HTC, 131 "htc ep %d reverted %d credits back (total %d)\n", 132 eid, credits, ep->tx_credits); 133 spin_unlock_bh(&htc->tx_lock); 134 135 if (ep->ep_ops.ep_tx_credits) 136 ep->ep_ops.ep_tx_credits(htc->ab); 137 } 138err_pull: 139 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 140 return ret; 141} 142 143static void 144ath11k_htc_process_credit_report(struct ath11k_htc *htc, 145 const struct ath11k_htc_credit_report *report, 146 int len, 147 enum ath11k_htc_ep_id eid) 148{ 149 struct ath11k_base *ab = htc->ab; 150 struct ath11k_htc_ep *ep; 151 int i, n_reports; 152 153 if (len % sizeof(*report)) 154 ath11k_warn(ab, "Uneven credit report len %d", len); 155 156 n_reports = len / sizeof(*report); 157 158 spin_lock_bh(&htc->tx_lock); 159 for (i = 0; i < n_reports; i++, report++) { 160 if (report->eid >= ATH11K_HTC_EP_COUNT) 161 break; 162 163 ep = &htc->endpoint[report->eid]; 164 ep->tx_credits += report->credits; 165 166 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 167 report->eid, report->credits, ep->tx_credits); 168 169 if (ep->ep_ops.ep_tx_credits) { 170 spin_unlock_bh(&htc->tx_lock); 171 ep->ep_ops.ep_tx_credits(htc->ab); 172 spin_lock_bh(&htc->tx_lock); 173 } 174 } 175 spin_unlock_bh(&htc->tx_lock); 176} 177 178static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 179 u8 *buffer, 180 int length, 181 enum ath11k_htc_ep_id src_eid) 182{ 183 struct ath11k_base *ab = htc->ab; 184 int status = 0; 185 struct ath11k_htc_record *record; 186 size_t len; 187 188 while (length > 0) { 189 record = (struct ath11k_htc_record *)buffer; 190 191 if (length < sizeof(record->hdr)) { 192 status = -EINVAL; 193 break; 194 } 195 196 if (record->hdr.len > length) { 197 /* no room left in buffer for record */ 198 ath11k_warn(ab, "Invalid record length: %d\n", 199 record->hdr.len); 200 status = -EINVAL; 201 break; 202 } 203 204 switch (record->hdr.id) { 205 case ATH11K_HTC_RECORD_CREDITS: 206 len = sizeof(struct ath11k_htc_credit_report); 207 if (record->hdr.len < len) { 208 ath11k_warn(ab, "Credit report too long\n"); 209 status = -EINVAL; 210 break; 211 } 212 ath11k_htc_process_credit_report(htc, 213 record->credit_report, 214 record->hdr.len, 215 src_eid); 216 break; 217 default: 218 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 219 record->hdr.id, record->hdr.len); 220 break; 221 } 222 223 if (status) 224 break; 225 226 /* multiple records may be present in a trailer */ 227 buffer += sizeof(record->hdr) + record->hdr.len; 228 length -= sizeof(record->hdr) + record->hdr.len; 229 } 230 231 return status; 232} 233 234void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 235 struct sk_buff *skb) 236{ 237 int status = 0; 238 struct ath11k_htc *htc = &ab->htc; 239 struct ath11k_htc_hdr *hdr; 240 struct ath11k_htc_ep *ep; 241 u16 payload_len; 242 u32 trailer_len = 0; 243 size_t min_len; 244 u8 eid; 245 bool trailer_present; 246 247 hdr = (struct ath11k_htc_hdr *)skb->data; 248 skb_pull(skb, sizeof(*hdr)); 249 250 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 251 252 if (eid >= ATH11K_HTC_EP_COUNT) { 253 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 254 goto out; 255 } 256 257 ep = &htc->endpoint[eid]; 258 259 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 260 261 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 262 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 263 payload_len + sizeof(*hdr)); 264 goto out; 265 } 266 267 if (skb->len < payload_len) { 268 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 269 skb->len, payload_len); 270 goto out; 271 } 272 273 /* get flags to check for trailer */ 274 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 275 ATH11K_HTC_FLAG_TRAILER_PRESENT; 276 277 if (trailer_present) { 278 u8 *trailer; 279 280 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 281 min_len = sizeof(struct ath11k_htc_record_hdr); 282 283 if ((trailer_len < min_len) || 284 (trailer_len > payload_len)) { 285 ath11k_warn(ab, "Invalid trailer length: %d\n", 286 trailer_len); 287 goto out; 288 } 289 290 trailer = (u8 *)hdr; 291 trailer += sizeof(*hdr); 292 trailer += payload_len; 293 trailer -= trailer_len; 294 status = ath11k_htc_process_trailer(htc, trailer, 295 trailer_len, eid); 296 if (status) 297 goto out; 298 299 skb_trim(skb, skb->len - trailer_len); 300 } 301 302 if (trailer_len >= payload_len) 303 /* zero length packet with trailer data, just drop these */ 304 goto out; 305 306 if (eid == ATH11K_HTC_EP_0) { 307 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 308 309 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 310 case ATH11K_HTC_MSG_READY_ID: 311 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 312 /* handle HTC control message */ 313 if (completion_done(&htc->ctl_resp)) { 314 /* this is a fatal error, target should not be 315 * sending unsolicited messages on the ep 0 316 */ 317 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 318 complete(&htc->ctl_resp); 319 goto out; 320 } 321 322 htc->control_resp_len = 323 min_t(int, skb->len, 324 ATH11K_HTC_MAX_CTRL_MSG_LEN); 325 326 memcpy(htc->control_resp_buffer, skb->data, 327 htc->control_resp_len); 328 329 complete(&htc->ctl_resp); 330 break; 331 default: 332 ath11k_warn(ab, "ignoring unsolicited htc ep0 event\n"); 333 break; 334 } 335 goto out; 336 } 337 338 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 339 eid, skb); 340 ep->ep_ops.ep_rx_complete(ab, skb); 341 342 /* poll tx completion for interrupt disabled CE's */ 343 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 344 345 /* skb is now owned by the rx completion handler */ 346 skb = NULL; 347out: 348 kfree_skb(skb); 349} 350 351static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 352 struct sk_buff *skb) 353{ 354 /* This is unexpected. FW is not supposed to send regular rx on this 355 * endpoint. 356 */ 357 ath11k_warn(ab, "unexpected htc rx\n"); 358 kfree_skb(skb); 359} 360 361static const char *htc_service_name(enum ath11k_htc_svc_id id) 362{ 363 switch (id) { 364 case ATH11K_HTC_SVC_ID_RESERVED: 365 return "Reserved"; 366 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 367 return "Control"; 368 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 369 return "WMI"; 370 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 371 return "DATA BE"; 372 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 373 return "DATA BK"; 374 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 375 return "DATA VI"; 376 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 377 return "DATA VO"; 378 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 379 return "WMI MAC1"; 380 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 381 return "WMI MAC2"; 382 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 383 return "NMI Control"; 384 case ATH11K_HTC_SVC_ID_NMI_DATA: 385 return "NMI Data"; 386 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 387 return "HTT Data"; 388 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 389 return "RAW"; 390 case ATH11K_HTC_SVC_ID_IPA_TX: 391 return "IPA TX"; 392 case ATH11K_HTC_SVC_ID_PKT_LOG: 393 return "PKT LOG"; 394 } 395 396 return "Unknown"; 397} 398 399static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 400{ 401 struct ath11k_htc_ep *ep; 402 int i; 403 404 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 405 ep = &htc->endpoint[i]; 406 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 407 ep->max_ep_message_len = 0; 408 ep->max_tx_queue_depth = 0; 409 ep->eid = i; 410 ep->htc = htc; 411 ep->tx_credit_flow_enabled = true; 412 } 413} 414 415static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 416 u16 service_id) 417{ 418 u8 i, allocation = 0; 419 420 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 421 if (htc->service_alloc_table[i].service_id == service_id) { 422 allocation = 423 htc->service_alloc_table[i].credit_allocation; 424 } 425 } 426 427 return allocation; 428} 429 430static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 431{ 432 struct ath11k_htc_svc_tx_credits *serv_entry; 433 u32 svc_id[] = { 434 ATH11K_HTC_SVC_ID_WMI_CONTROL, 435 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 436 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 437 }; 438 int i, credits; 439 440 credits = htc->total_transmit_credits; 441 serv_entry = htc->service_alloc_table; 442 443 if ((htc->wmi_ep_count == 0) || 444 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 445 return -EINVAL; 446 447 /* Divide credits among number of endpoints for WMI */ 448 credits = credits / htc->wmi_ep_count; 449 for (i = 0; i < htc->wmi_ep_count; i++) { 450 serv_entry[i].service_id = svc_id[i]; 451 serv_entry[i].credit_allocation = credits; 452 } 453 454 return 0; 455} 456 457int ath11k_htc_wait_target(struct ath11k_htc *htc) 458{ 459 int i, status = 0; 460 struct ath11k_base *ab = htc->ab; 461 unsigned long time_left; 462 struct ath11k_htc_ready *ready; 463 u16 message_id; 464 u16 credit_count; 465 u16 credit_size; 466 467 time_left = wait_for_completion_timeout(&htc->ctl_resp, 468 ATH11K_HTC_WAIT_TIMEOUT_HZ); 469 if (!time_left) { 470 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 471 472 for (i = 0; i < ab->hw_params.ce_count; i++) 473 ath11k_ce_per_engine_service(htc->ab, i); 474 475 time_left = 476 wait_for_completion_timeout(&htc->ctl_resp, 477 ATH11K_HTC_WAIT_TIMEOUT_HZ); 478 479 if (!time_left) 480 status = -ETIMEDOUT; 481 } 482 483 if (status < 0) { 484 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 485 return status; 486 } 487 488 if (htc->control_resp_len < sizeof(*ready)) { 489 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 490 htc->control_resp_len); 491 return -ECOMM; 492 } 493 494 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 495 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 496 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 497 ready->id_credit_count); 498 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 499 500 if (message_id != ATH11K_HTC_MSG_READY_ID) { 501 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 502 return -ECOMM; 503 } 504 505 htc->total_transmit_credits = credit_count; 506 htc->target_credit_size = credit_size; 507 508 ath11k_dbg(ab, ATH11K_DBG_HTC, 509 "Target ready! transmit resources: %d size:%d\n", 510 htc->total_transmit_credits, htc->target_credit_size); 511 512 if ((htc->total_transmit_credits == 0) || 513 (htc->target_credit_size == 0)) { 514 ath11k_warn(ab, "Invalid credit size received\n"); 515 return -ECOMM; 516 } 517 518 /* For QCA6390, wmi endpoint uses 1 credit to avoid 519 * back-to-back write. 520 */ 521 if (ab->hw_params.supports_shadow_regs) 522 htc->total_transmit_credits = 1; 523 524 ath11k_htc_setup_target_buffer_assignments(htc); 525 526 return 0; 527} 528 529int ath11k_htc_connect_service(struct ath11k_htc *htc, 530 struct ath11k_htc_svc_conn_req *conn_req, 531 struct ath11k_htc_svc_conn_resp *conn_resp) 532{ 533 struct ath11k_base *ab = htc->ab; 534 struct ath11k_htc_conn_svc *req_msg; 535 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 536 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 537 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 538 struct ath11k_htc_ep *ep; 539 struct sk_buff *skb; 540 unsigned int max_msg_size = 0; 541 int length, status; 542 unsigned long time_left; 543 bool disable_credit_flow_ctrl = false; 544 u16 message_id, service_id, flags = 0; 545 u8 tx_alloc = 0; 546 547 /* special case for HTC pseudo control service */ 548 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 549 disable_credit_flow_ctrl = true; 550 assigned_eid = ATH11K_HTC_EP_0; 551 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 552 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 553 goto setup; 554 } 555 556 tx_alloc = ath11k_htc_get_credit_allocation(htc, 557 conn_req->service_id); 558 if (!tx_alloc) 559 ath11k_dbg(ab, ATH11K_DBG_BOOT, 560 "boot htc service %s does not allocate target credits\n", 561 htc_service_name(conn_req->service_id)); 562 563 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 564 if (!skb) { 565 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 566 return -ENOMEM; 567 } 568 569 length = sizeof(*req_msg); 570 skb_put(skb, length); 571 memset(skb->data, 0, length); 572 573 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 574 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 575 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 576 577 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 578 579 /* Only enable credit flow control for WMI ctrl service */ 580 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 581 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 582 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 583 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 584 disable_credit_flow_ctrl = true; 585 } 586 587 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 588 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 589 conn_req->service_id); 590 591 reinit_completion(&htc->ctl_resp); 592 593 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 594 if (status) { 595 kfree_skb(skb); 596 return status; 597 } 598 599 /* wait for response */ 600 time_left = wait_for_completion_timeout(&htc->ctl_resp, 601 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 602 if (!time_left) { 603 ath11k_err(ab, "Service connect timeout\n"); 604 return -ETIMEDOUT; 605 } 606 607 /* we controlled the buffer creation, it's aligned */ 608 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 609 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 610 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 611 resp_msg->msg_svc_id); 612 613 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 614 (htc->control_resp_len < sizeof(*resp_msg))) { 615 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 616 return -EPROTO; 617 } 618 619 ath11k_dbg(ab, ATH11K_DBG_HTC, 620 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 621 htc_service_name(service_id), 622 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 623 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 624 625 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 626 resp_msg->flags_len); 627 628 /* check response status */ 629 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 630 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 631 htc_service_name(service_id), 632 conn_resp->connect_resp_code); 633 return -EPROTO; 634 } 635 636 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 637 HTC_SVC_RESP_MSG_ENDPOINTID, 638 resp_msg->flags_len); 639 640 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 641 resp_msg->flags_len); 642 643setup: 644 645 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 646 return -EPROTO; 647 648 if (max_msg_size == 0) 649 return -EPROTO; 650 651 ep = &htc->endpoint[assigned_eid]; 652 ep->eid = assigned_eid; 653 654 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 655 return -EPROTO; 656 657 /* return assigned endpoint to caller */ 658 conn_resp->eid = assigned_eid; 659 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 660 resp_msg->flags_len); 661 662 /* setup the endpoint */ 663 ep->service_id = conn_req->service_id; 664 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 665 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 666 resp_msg->flags_len); 667 ep->tx_credits = tx_alloc; 668 669 /* copy all the callbacks */ 670 ep->ep_ops = conn_req->ep_ops; 671 672 status = ath11k_hif_map_service_to_pipe(htc->ab, 673 ep->service_id, 674 &ep->ul_pipe_id, 675 &ep->dl_pipe_id); 676 if (status) 677 return status; 678 679 ath11k_dbg(ab, ATH11K_DBG_BOOT, 680 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 681 htc_service_name(ep->service_id), ep->ul_pipe_id, 682 ep->dl_pipe_id, ep->eid); 683 684 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 685 ep->tx_credit_flow_enabled = false; 686 ath11k_dbg(ab, ATH11K_DBG_BOOT, 687 "boot htc service '%s' eid %d TX flow control disabled\n", 688 htc_service_name(ep->service_id), assigned_eid); 689 } 690 691 return status; 692} 693 694int ath11k_htc_start(struct ath11k_htc *htc) 695{ 696 struct sk_buff *skb; 697 int status = 0; 698 struct ath11k_base *ab = htc->ab; 699 struct ath11k_htc_setup_complete_extended *msg; 700 701 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 702 if (!skb) 703 return -ENOMEM; 704 705 skb_put(skb, sizeof(*msg)); 706 memset(skb->data, 0, skb->len); 707 708 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 709 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 710 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 711 712 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 713 714 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 715 if (status) { 716 kfree_skb(skb); 717 return status; 718 } 719 720 return 0; 721} 722 723int ath11k_htc_init(struct ath11k_base *ab) 724{ 725 struct ath11k_htc *htc = &ab->htc; 726 struct ath11k_htc_svc_conn_req conn_req; 727 struct ath11k_htc_svc_conn_resp conn_resp; 728 int ret; 729 730 spin_lock_init(&htc->tx_lock); 731 732 ath11k_htc_reset_endpoint_states(htc); 733 734 htc->ab = ab; 735 736 switch (ab->wmi_ab.preferred_hw_mode) { 737 case WMI_HOST_HW_MODE_SINGLE: 738 htc->wmi_ep_count = 1; 739 break; 740 case WMI_HOST_HW_MODE_DBS: 741 case WMI_HOST_HW_MODE_DBS_OR_SBS: 742 htc->wmi_ep_count = 2; 743 break; 744 case WMI_HOST_HW_MODE_DBS_SBS: 745 htc->wmi_ep_count = 3; 746 break; 747 default: 748 htc->wmi_ep_count = ab->hw_params.max_radios; 749 break; 750 } 751 752 /* setup our pseudo HTC control endpoint connection */ 753 memset(&conn_req, 0, sizeof(conn_req)); 754 memset(&conn_resp, 0, sizeof(conn_resp)); 755 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 756 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 757 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 758 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 759 760 /* connect fake service */ 761 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 762 if (ret) { 763 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 764 return ret; 765 } 766 767 init_completion(&htc->ctl_resp); 768 769 return 0; 770} 771