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 "ahb.h" 9 #include "debug.h" 10 11 struct 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 28 static void ath11k_htc_control_tx_complete(struct ath11k_base *ab, 29 struct sk_buff *skb) 30 { 31 kfree_skb(skb); 32 } 33 34 static 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 53 static inline void ath11k_htc_restore_tx_skb(struct ath11k_htc *htc, 54 struct sk_buff *skb) 55 { 56 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); 57 58 dma_unmap_single(htc->ab->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 59 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 60 } 61 62 static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep, 63 struct sk_buff *skb) 64 { 65 struct ath11k_htc_hdr *hdr; 66 67 hdr = (struct ath11k_htc_hdr *)skb->data; 68 69 memset(hdr, 0, sizeof(*hdr)); 70 hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) | 71 FIELD_PREP(HTC_HDR_PAYLOADLEN, 72 (skb->len - sizeof(*hdr))) | 73 FIELD_PREP(HTC_HDR_FLAGS, 74 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE); 75 76 spin_lock_bh(&ep->htc->tx_lock); 77 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++); 78 spin_unlock_bh(&ep->htc->tx_lock); 79 } 80 81 int ath11k_htc_send(struct ath11k_htc *htc, 82 enum ath11k_htc_ep_id eid, 83 struct sk_buff *skb) 84 { 85 struct ath11k_htc_ep *ep = &htc->endpoint[eid]; 86 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); 87 struct device *dev = htc->ab->dev; 88 struct ath11k_base *ab = htc->ab; 89 int credits = 0; 90 int ret; 91 92 if (eid >= ATH11K_HTC_EP_COUNT) { 93 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); 94 return -ENOENT; 95 } 96 97 skb_push(skb, sizeof(struct ath11k_htc_hdr)); 98 99 if (ep->tx_credit_flow_enabled) { 100 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 101 spin_lock_bh(&htc->tx_lock); 102 if (ep->tx_credits < credits) { 103 ath11k_dbg(ab, ATH11K_DBG_HTC, 104 "htc insufficient credits ep %d required %d available %d\n", 105 eid, credits, ep->tx_credits); 106 spin_unlock_bh(&htc->tx_lock); 107 ret = -EAGAIN; 108 goto err_pull; 109 } 110 ep->tx_credits -= credits; 111 ath11k_dbg(ab, ATH11K_DBG_HTC, 112 "htc ep %d consumed %d credits (total %d)\n", 113 eid, credits, ep->tx_credits); 114 spin_unlock_bh(&htc->tx_lock); 115 } 116 117 ath11k_htc_prepare_tx_skb(ep, skb); 118 119 skb_cb->eid = eid; 120 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 121 ret = dma_mapping_error(dev, skb_cb->paddr); 122 if (ret) { 123 ret = -EIO; 124 goto err_credits; 125 } 126 127 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 128 if (ret) 129 goto err_unmap; 130 131 return 0; 132 133 err_unmap: 134 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 135 err_credits: 136 if (ep->tx_credit_flow_enabled) { 137 spin_lock_bh(&htc->tx_lock); 138 ep->tx_credits += credits; 139 ath11k_dbg(ab, ATH11K_DBG_HTC, 140 "htc ep %d reverted %d credits back (total %d)\n", 141 eid, credits, ep->tx_credits); 142 spin_unlock_bh(&htc->tx_lock); 143 144 if (ep->ep_ops.ep_tx_credits) 145 ep->ep_ops.ep_tx_credits(htc->ab); 146 } 147 err_pull: 148 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 149 return ret; 150 } 151 152 static void 153 ath11k_htc_process_credit_report(struct ath11k_htc *htc, 154 const struct ath11k_htc_credit_report *report, 155 int len, 156 enum ath11k_htc_ep_id eid) 157 { 158 struct ath11k_base *ab = htc->ab; 159 struct ath11k_htc_ep *ep; 160 int i, n_reports; 161 162 if (len % sizeof(*report)) 163 ath11k_warn(ab, "Uneven credit report len %d", len); 164 165 n_reports = len / sizeof(*report); 166 167 spin_lock_bh(&htc->tx_lock); 168 for (i = 0; i < n_reports; i++, report++) { 169 if (report->eid >= ATH11K_HTC_EP_COUNT) 170 break; 171 172 ep = &htc->endpoint[report->eid]; 173 ep->tx_credits += report->credits; 174 175 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 176 report->eid, report->credits, ep->tx_credits); 177 178 if (ep->ep_ops.ep_tx_credits) { 179 spin_unlock_bh(&htc->tx_lock); 180 ep->ep_ops.ep_tx_credits(htc->ab); 181 spin_lock_bh(&htc->tx_lock); 182 } 183 } 184 spin_unlock_bh(&htc->tx_lock); 185 } 186 187 static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 188 u8 *buffer, 189 int length, 190 enum ath11k_htc_ep_id src_eid) 191 { 192 struct ath11k_base *ab = htc->ab; 193 int status = 0; 194 struct ath11k_htc_record *record; 195 size_t len; 196 197 while (length > 0) { 198 record = (struct ath11k_htc_record *)buffer; 199 200 if (length < sizeof(record->hdr)) { 201 status = -EINVAL; 202 break; 203 } 204 205 if (record->hdr.len > length) { 206 /* no room left in buffer for record */ 207 ath11k_warn(ab, "Invalid record length: %d\n", 208 record->hdr.len); 209 status = -EINVAL; 210 break; 211 } 212 213 switch (record->hdr.id) { 214 case ATH11K_HTC_RECORD_CREDITS: 215 len = sizeof(struct ath11k_htc_credit_report); 216 if (record->hdr.len < len) { 217 ath11k_warn(ab, "Credit report too long\n"); 218 status = -EINVAL; 219 break; 220 } 221 ath11k_htc_process_credit_report(htc, 222 record->credit_report, 223 record->hdr.len, 224 src_eid); 225 break; 226 default: 227 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 228 record->hdr.id, record->hdr.len); 229 break; 230 } 231 232 if (status) 233 break; 234 235 /* multiple records may be present in a trailer */ 236 buffer += sizeof(record->hdr) + record->hdr.len; 237 length -= sizeof(record->hdr) + record->hdr.len; 238 } 239 240 return status; 241 } 242 243 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 244 struct sk_buff *skb) 245 { 246 int status = 0; 247 struct ath11k_htc *htc = &ab->htc; 248 struct ath11k_htc_hdr *hdr; 249 struct ath11k_htc_ep *ep; 250 u16 payload_len; 251 u32 trailer_len = 0; 252 size_t min_len; 253 u8 eid; 254 bool trailer_present; 255 256 hdr = (struct ath11k_htc_hdr *)skb->data; 257 skb_pull(skb, sizeof(*hdr)); 258 259 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 260 261 if (eid >= ATH11K_HTC_EP_COUNT) { 262 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 263 goto out; 264 } 265 266 ep = &htc->endpoint[eid]; 267 268 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 269 270 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 271 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 272 payload_len + sizeof(*hdr)); 273 goto out; 274 } 275 276 if (skb->len < payload_len) { 277 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 278 skb->len, payload_len); 279 goto out; 280 } 281 282 /* get flags to check for trailer */ 283 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 284 ATH11K_HTC_FLAG_TRAILER_PRESENT; 285 286 if (trailer_present) { 287 u8 *trailer; 288 289 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 290 min_len = sizeof(struct ath11k_htc_record_hdr); 291 292 if ((trailer_len < min_len) || 293 (trailer_len > payload_len)) { 294 ath11k_warn(ab, "Invalid trailer length: %d\n", 295 trailer_len); 296 goto out; 297 } 298 299 trailer = (u8 *)hdr; 300 trailer += sizeof(*hdr); 301 trailer += payload_len; 302 trailer -= trailer_len; 303 status = ath11k_htc_process_trailer(htc, trailer, 304 trailer_len, eid); 305 if (status) 306 goto out; 307 308 skb_trim(skb, skb->len - trailer_len); 309 } 310 311 if (trailer_len >= payload_len) 312 /* zero length packet with trailer data, just drop these */ 313 goto out; 314 315 if (eid == ATH11K_HTC_EP_0) { 316 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 317 318 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 319 case ATH11K_HTC_MSG_READY_ID: 320 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 321 /* handle HTC control message */ 322 if (completion_done(&htc->ctl_resp)) { 323 /* this is a fatal error, target should not be 324 * sending unsolicited messages on the ep 0 325 */ 326 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 327 complete(&htc->ctl_resp); 328 goto out; 329 } 330 331 htc->control_resp_len = 332 min_t(int, skb->len, 333 ATH11K_HTC_MAX_CTRL_MSG_LEN); 334 335 memcpy(htc->control_resp_buffer, skb->data, 336 htc->control_resp_len); 337 338 complete(&htc->ctl_resp); 339 break; 340 default: 341 ath11k_warn(ab, "ignoring unsolicited htc ep0 event\n"); 342 break; 343 } 344 goto out; 345 } 346 347 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 348 eid, skb); 349 ep->ep_ops.ep_rx_complete(ab, skb); 350 351 /* poll tx completion for interrupt disabled CE's */ 352 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 353 354 /* skb is now owned by the rx completion handler */ 355 skb = NULL; 356 out: 357 kfree_skb(skb); 358 } 359 360 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 361 struct sk_buff *skb) 362 { 363 /* This is unexpected. FW is not supposed to send regular rx on this 364 * endpoint. 365 */ 366 ath11k_warn(ab, "unexpected htc rx\n"); 367 kfree_skb(skb); 368 } 369 370 static const char *htc_service_name(enum ath11k_htc_svc_id id) 371 { 372 switch (id) { 373 case ATH11K_HTC_SVC_ID_RESERVED: 374 return "Reserved"; 375 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 376 return "Control"; 377 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 378 return "WMI"; 379 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 380 return "DATA BE"; 381 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 382 return "DATA BK"; 383 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 384 return "DATA VI"; 385 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 386 return "DATA VO"; 387 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 388 return "WMI MAC1"; 389 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 390 return "WMI MAC2"; 391 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 392 return "NMI Control"; 393 case ATH11K_HTC_SVC_ID_NMI_DATA: 394 return "NMI Data"; 395 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 396 return "HTT Data"; 397 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 398 return "RAW"; 399 case ATH11K_HTC_SVC_ID_IPA_TX: 400 return "IPA TX"; 401 case ATH11K_HTC_SVC_ID_PKT_LOG: 402 return "PKT LOG"; 403 } 404 405 return "Unknown"; 406 } 407 408 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 409 { 410 struct ath11k_htc_ep *ep; 411 int i; 412 413 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 414 ep = &htc->endpoint[i]; 415 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 416 ep->max_ep_message_len = 0; 417 ep->max_tx_queue_depth = 0; 418 ep->eid = i; 419 ep->htc = htc; 420 ep->tx_credit_flow_enabled = true; 421 } 422 } 423 424 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 425 u16 service_id) 426 { 427 u8 i, allocation = 0; 428 429 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 430 if (htc->service_alloc_table[i].service_id == service_id) { 431 allocation = 432 htc->service_alloc_table[i].credit_allocation; 433 } 434 } 435 436 return allocation; 437 } 438 439 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 440 { 441 struct ath11k_htc_svc_tx_credits *serv_entry; 442 u32 svc_id[] = { 443 ATH11K_HTC_SVC_ID_WMI_CONTROL, 444 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 445 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 446 }; 447 int i, credits; 448 449 credits = htc->total_transmit_credits; 450 serv_entry = htc->service_alloc_table; 451 452 if ((htc->wmi_ep_count == 0) || 453 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 454 return -EINVAL; 455 456 /* Divide credits among number of endpoints for WMI */ 457 credits = credits / htc->wmi_ep_count; 458 for (i = 0; i < htc->wmi_ep_count; i++) { 459 serv_entry[i].service_id = svc_id[i]; 460 serv_entry[i].credit_allocation = credits; 461 } 462 463 return 0; 464 } 465 466 int ath11k_htc_wait_target(struct ath11k_htc *htc) 467 { 468 int i, status = 0; 469 struct ath11k_base *ab = htc->ab; 470 unsigned long time_left; 471 struct ath11k_htc_ready *ready; 472 u16 message_id; 473 u16 credit_count; 474 u16 credit_size; 475 476 time_left = wait_for_completion_timeout(&htc->ctl_resp, 477 ATH11K_HTC_WAIT_TIMEOUT_HZ); 478 if (!time_left) { 479 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 480 481 for (i = 0; i < CE_COUNT; i++) 482 ath11k_ce_per_engine_service(htc->ab, i); 483 484 time_left = 485 wait_for_completion_timeout(&htc->ctl_resp, 486 ATH11K_HTC_WAIT_TIMEOUT_HZ); 487 488 if (!time_left) 489 status = -ETIMEDOUT; 490 } 491 492 if (status < 0) { 493 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 494 return status; 495 } 496 497 if (htc->control_resp_len < sizeof(*ready)) { 498 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 499 htc->control_resp_len); 500 return -ECOMM; 501 } 502 503 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 504 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 505 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 506 ready->id_credit_count); 507 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 508 509 if (message_id != ATH11K_HTC_MSG_READY_ID) { 510 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 511 return -ECOMM; 512 } 513 514 htc->total_transmit_credits = credit_count; 515 htc->target_credit_size = credit_size; 516 517 ath11k_dbg(ab, ATH11K_DBG_HTC, 518 "Target ready! transmit resources: %d size:%d\n", 519 htc->total_transmit_credits, htc->target_credit_size); 520 521 if ((htc->total_transmit_credits == 0) || 522 (htc->target_credit_size == 0)) { 523 ath11k_warn(ab, "Invalid credit size received\n"); 524 return -ECOMM; 525 } 526 527 ath11k_htc_setup_target_buffer_assignments(htc); 528 529 return 0; 530 } 531 532 int ath11k_htc_connect_service(struct ath11k_htc *htc, 533 struct ath11k_htc_svc_conn_req *conn_req, 534 struct ath11k_htc_svc_conn_resp *conn_resp) 535 { 536 struct ath11k_base *ab = htc->ab; 537 struct ath11k_htc_conn_svc *req_msg; 538 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 539 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 540 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 541 struct ath11k_htc_ep *ep; 542 struct sk_buff *skb; 543 unsigned int max_msg_size = 0; 544 int length, status; 545 unsigned long time_left; 546 bool disable_credit_flow_ctrl = false; 547 u16 message_id, service_id, flags = 0; 548 u8 tx_alloc = 0; 549 550 /* special case for HTC pseudo control service */ 551 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 552 disable_credit_flow_ctrl = true; 553 assigned_eid = ATH11K_HTC_EP_0; 554 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 555 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 556 goto setup; 557 } 558 559 tx_alloc = ath11k_htc_get_credit_allocation(htc, 560 conn_req->service_id); 561 if (!tx_alloc) 562 ath11k_dbg(ab, ATH11K_DBG_BOOT, 563 "boot htc service %s does not allocate target credits\n", 564 htc_service_name(conn_req->service_id)); 565 566 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 567 if (!skb) { 568 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 569 return -ENOMEM; 570 } 571 572 length = sizeof(*req_msg); 573 skb_put(skb, length); 574 memset(skb->data, 0, length); 575 576 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 577 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 578 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 579 580 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 581 582 /* Only enable credit flow control for WMI ctrl service */ 583 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 584 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 585 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 586 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 587 disable_credit_flow_ctrl = true; 588 } 589 590 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 591 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 592 conn_req->service_id); 593 594 reinit_completion(&htc->ctl_resp); 595 596 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 597 if (status) { 598 kfree_skb(skb); 599 return status; 600 } 601 602 /* wait for response */ 603 time_left = wait_for_completion_timeout(&htc->ctl_resp, 604 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 605 if (!time_left) { 606 ath11k_err(ab, "Service connect timeout\n"); 607 return -ETIMEDOUT; 608 } 609 610 /* we controlled the buffer creation, it's aligned */ 611 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 612 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 613 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 614 resp_msg->msg_svc_id); 615 616 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 617 (htc->control_resp_len < sizeof(*resp_msg))) { 618 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 619 return -EPROTO; 620 } 621 622 ath11k_dbg(ab, ATH11K_DBG_HTC, 623 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 624 htc_service_name(service_id), 625 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 626 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 627 628 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 629 resp_msg->flags_len); 630 631 /* check response status */ 632 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 633 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 634 htc_service_name(service_id), 635 conn_resp->connect_resp_code); 636 return -EPROTO; 637 } 638 639 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 640 HTC_SVC_RESP_MSG_ENDPOINTID, 641 resp_msg->flags_len); 642 643 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 644 resp_msg->flags_len); 645 646 setup: 647 648 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 649 return -EPROTO; 650 651 if (max_msg_size == 0) 652 return -EPROTO; 653 654 ep = &htc->endpoint[assigned_eid]; 655 ep->eid = assigned_eid; 656 657 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 658 return -EPROTO; 659 660 /* return assigned endpoint to caller */ 661 conn_resp->eid = assigned_eid; 662 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 663 resp_msg->flags_len); 664 665 /* setup the endpoint */ 666 ep->service_id = conn_req->service_id; 667 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 668 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 669 resp_msg->flags_len); 670 ep->tx_credits = tx_alloc; 671 672 /* copy all the callbacks */ 673 ep->ep_ops = conn_req->ep_ops; 674 675 status = ath11k_ahb_map_service_to_pipe(htc->ab, 676 ep->service_id, 677 &ep->ul_pipe_id, 678 &ep->dl_pipe_id); 679 if (status) 680 return status; 681 682 ath11k_dbg(ab, ATH11K_DBG_BOOT, 683 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 684 htc_service_name(ep->service_id), ep->ul_pipe_id, 685 ep->dl_pipe_id, ep->eid); 686 687 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 688 ep->tx_credit_flow_enabled = false; 689 ath11k_dbg(ab, ATH11K_DBG_BOOT, 690 "boot htc service '%s' eid %d TX flow control disabled\n", 691 htc_service_name(ep->service_id), assigned_eid); 692 } 693 694 return status; 695 } 696 697 int ath11k_htc_start(struct ath11k_htc *htc) 698 { 699 struct sk_buff *skb; 700 int status = 0; 701 struct ath11k_base *ab = htc->ab; 702 struct ath11k_htc_setup_complete_extended *msg; 703 704 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 705 if (!skb) 706 return -ENOMEM; 707 708 skb_put(skb, sizeof(*msg)); 709 memset(skb->data, 0, skb->len); 710 711 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 712 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 713 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 714 715 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 716 717 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 718 if (status) { 719 kfree_skb(skb); 720 return status; 721 } 722 723 return 0; 724 } 725 726 int ath11k_htc_init(struct ath11k_base *ab) 727 { 728 struct ath11k_htc *htc = &ab->htc; 729 struct ath11k_htc_svc_conn_req conn_req; 730 struct ath11k_htc_svc_conn_resp conn_resp; 731 int ret; 732 733 spin_lock_init(&htc->tx_lock); 734 735 ath11k_htc_reset_endpoint_states(htc); 736 737 htc->ab = ab; 738 739 switch (ab->wmi_ab.preferred_hw_mode) { 740 case WMI_HOST_HW_MODE_SINGLE: 741 htc->wmi_ep_count = 1; 742 break; 743 case WMI_HOST_HW_MODE_DBS: 744 case WMI_HOST_HW_MODE_DBS_OR_SBS: 745 htc->wmi_ep_count = 2; 746 break; 747 case WMI_HOST_HW_MODE_DBS_SBS: 748 htc->wmi_ep_count = 3; 749 break; 750 default: 751 htc->wmi_ep_count = 3; 752 break; 753 } 754 755 /* setup our pseudo HTC control endpoint connection */ 756 memset(&conn_req, 0, sizeof(conn_req)); 757 memset(&conn_resp, 0, sizeof(conn_resp)); 758 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 759 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 760 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 761 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 762 763 /* connect fake service */ 764 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 765 if (ret) { 766 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 767 return ret; 768 } 769 770 init_completion(&htc->ctl_resp); 771 772 return 0; 773 } 774