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 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 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 65 if (ep->tx_credit_flow_enabled) 66 hdr->htc_info |= FIELD_PREP(HTC_HDR_FLAGS, 67 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE); 68 69 spin_lock_bh(&ep->htc->tx_lock); 70 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++); 71 spin_unlock_bh(&ep->htc->tx_lock); 72 } 73 74 int ath11k_htc_send(struct ath11k_htc *htc, 75 enum ath11k_htc_ep_id eid, 76 struct sk_buff *skb) 77 { 78 struct ath11k_htc_ep *ep = &htc->endpoint[eid]; 79 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); 80 struct device *dev = htc->ab->dev; 81 struct ath11k_base *ab = htc->ab; 82 int credits = 0; 83 int ret; 84 85 if (eid >= ATH11K_HTC_EP_COUNT) { 86 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); 87 return -ENOENT; 88 } 89 90 skb_push(skb, sizeof(struct ath11k_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 ath11k_dbg(ab, ATH11K_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 ath11k_dbg(ab, ATH11K_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 ath11k_htc_prepare_tx_skb(ep, skb); 111 112 skb_cb->eid = eid; 113 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 114 ret = dma_mapping_error(dev, skb_cb->paddr); 115 if (ret) { 116 ret = -EIO; 117 goto err_credits; 118 } 119 120 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 121 if (ret) 122 goto err_unmap; 123 124 return 0; 125 126 err_unmap: 127 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 128 err_credits: 129 if (ep->tx_credit_flow_enabled) { 130 spin_lock_bh(&htc->tx_lock); 131 ep->tx_credits += credits; 132 ath11k_dbg(ab, ATH11K_DBG_HTC, 133 "htc ep %d reverted %d credits back (total %d)\n", 134 eid, credits, ep->tx_credits); 135 spin_unlock_bh(&htc->tx_lock); 136 137 if (ep->ep_ops.ep_tx_credits) 138 ep->ep_ops.ep_tx_credits(htc->ab); 139 } 140 err_pull: 141 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 142 return ret; 143 } 144 145 static void 146 ath11k_htc_process_credit_report(struct ath11k_htc *htc, 147 const struct ath11k_htc_credit_report *report, 148 int len, 149 enum ath11k_htc_ep_id eid) 150 { 151 struct ath11k_base *ab = htc->ab; 152 struct ath11k_htc_ep *ep; 153 int i, n_reports; 154 155 if (len % sizeof(*report)) 156 ath11k_warn(ab, "Uneven credit report len %d", len); 157 158 n_reports = len / sizeof(*report); 159 160 spin_lock_bh(&htc->tx_lock); 161 for (i = 0; i < n_reports; i++, report++) { 162 if (report->eid >= ATH11K_HTC_EP_COUNT) 163 break; 164 165 ep = &htc->endpoint[report->eid]; 166 ep->tx_credits += report->credits; 167 168 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 169 report->eid, report->credits, ep->tx_credits); 170 171 if (ep->ep_ops.ep_tx_credits) { 172 spin_unlock_bh(&htc->tx_lock); 173 ep->ep_ops.ep_tx_credits(htc->ab); 174 spin_lock_bh(&htc->tx_lock); 175 } 176 } 177 spin_unlock_bh(&htc->tx_lock); 178 } 179 180 static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 181 u8 *buffer, 182 int length, 183 enum ath11k_htc_ep_id src_eid) 184 { 185 struct ath11k_base *ab = htc->ab; 186 int status = 0; 187 struct ath11k_htc_record *record; 188 size_t len; 189 190 while (length > 0) { 191 record = (struct ath11k_htc_record *)buffer; 192 193 if (length < sizeof(record->hdr)) { 194 status = -EINVAL; 195 break; 196 } 197 198 if (record->hdr.len > length) { 199 /* no room left in buffer for record */ 200 ath11k_warn(ab, "Invalid record length: %d\n", 201 record->hdr.len); 202 status = -EINVAL; 203 break; 204 } 205 206 switch (record->hdr.id) { 207 case ATH11K_HTC_RECORD_CREDITS: 208 len = sizeof(struct ath11k_htc_credit_report); 209 if (record->hdr.len < len) { 210 ath11k_warn(ab, "Credit report too long\n"); 211 status = -EINVAL; 212 break; 213 } 214 ath11k_htc_process_credit_report(htc, 215 record->credit_report, 216 record->hdr.len, 217 src_eid); 218 break; 219 default: 220 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 221 record->hdr.id, record->hdr.len); 222 break; 223 } 224 225 if (status) 226 break; 227 228 /* multiple records may be present in a trailer */ 229 buffer += sizeof(record->hdr) + record->hdr.len; 230 length -= sizeof(record->hdr) + record->hdr.len; 231 } 232 233 return status; 234 } 235 236 static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack) 237 { 238 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot suspend complete %d\n", ack); 239 240 if (ack) 241 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 242 else 243 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 244 245 complete(&ab->htc_suspend); 246 } 247 248 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 249 struct sk_buff *skb) 250 { 251 int status = 0; 252 struct ath11k_htc *htc = &ab->htc; 253 struct ath11k_htc_hdr *hdr; 254 struct ath11k_htc_ep *ep; 255 u16 payload_len; 256 u32 trailer_len = 0; 257 size_t min_len; 258 u8 eid; 259 bool trailer_present; 260 261 hdr = (struct ath11k_htc_hdr *)skb->data; 262 skb_pull(skb, sizeof(*hdr)); 263 264 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 265 266 if (eid >= ATH11K_HTC_EP_COUNT) { 267 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 268 goto out; 269 } 270 271 ep = &htc->endpoint[eid]; 272 273 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 274 275 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 276 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 277 payload_len + sizeof(*hdr)); 278 goto out; 279 } 280 281 if (skb->len < payload_len) { 282 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 283 skb->len, payload_len); 284 goto out; 285 } 286 287 /* get flags to check for trailer */ 288 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 289 ATH11K_HTC_FLAG_TRAILER_PRESENT; 290 291 if (trailer_present) { 292 u8 *trailer; 293 294 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 295 min_len = sizeof(struct ath11k_htc_record_hdr); 296 297 if ((trailer_len < min_len) || 298 (trailer_len > payload_len)) { 299 ath11k_warn(ab, "Invalid trailer length: %d\n", 300 trailer_len); 301 goto out; 302 } 303 304 trailer = (u8 *)hdr; 305 trailer += sizeof(*hdr); 306 trailer += payload_len; 307 trailer -= trailer_len; 308 status = ath11k_htc_process_trailer(htc, trailer, 309 trailer_len, eid); 310 if (status) 311 goto out; 312 313 skb_trim(skb, skb->len - trailer_len); 314 } 315 316 if (trailer_len >= payload_len) 317 /* zero length packet with trailer data, just drop these */ 318 goto out; 319 320 if (eid == ATH11K_HTC_EP_0) { 321 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 322 323 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 324 case ATH11K_HTC_MSG_READY_ID: 325 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 326 /* handle HTC control message */ 327 if (completion_done(&htc->ctl_resp)) { 328 /* this is a fatal error, target should not be 329 * sending unsolicited messages on the ep 0 330 */ 331 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 332 complete(&htc->ctl_resp); 333 goto out; 334 } 335 336 htc->control_resp_len = 337 min_t(int, skb->len, 338 ATH11K_HTC_MAX_CTRL_MSG_LEN); 339 340 memcpy(htc->control_resp_buffer, skb->data, 341 htc->control_resp_len); 342 343 complete(&htc->ctl_resp); 344 break; 345 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 346 ath11k_htc_suspend_complete(ab, true); 347 break; 348 case ATH11K_HTC_MSG_NACK_SUSPEND: 349 ath11k_htc_suspend_complete(ab, false); 350 break; 351 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 352 break; 353 default: 354 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 355 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 356 break; 357 } 358 goto out; 359 } 360 361 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 362 eid, skb); 363 ep->ep_ops.ep_rx_complete(ab, skb); 364 365 /* poll tx completion for interrupt disabled CE's */ 366 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 367 368 /* skb is now owned by the rx completion handler */ 369 skb = NULL; 370 out: 371 kfree_skb(skb); 372 } 373 374 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 375 struct sk_buff *skb) 376 { 377 /* This is unexpected. FW is not supposed to send regular rx on this 378 * endpoint. 379 */ 380 ath11k_warn(ab, "unexpected htc rx\n"); 381 kfree_skb(skb); 382 } 383 384 static const char *htc_service_name(enum ath11k_htc_svc_id id) 385 { 386 switch (id) { 387 case ATH11K_HTC_SVC_ID_RESERVED: 388 return "Reserved"; 389 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 390 return "Control"; 391 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 392 return "WMI"; 393 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 394 return "DATA BE"; 395 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 396 return "DATA BK"; 397 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 398 return "DATA VI"; 399 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 400 return "DATA VO"; 401 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 402 return "WMI MAC1"; 403 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 404 return "WMI MAC2"; 405 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 406 return "NMI Control"; 407 case ATH11K_HTC_SVC_ID_NMI_DATA: 408 return "NMI Data"; 409 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 410 return "HTT Data"; 411 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 412 return "RAW"; 413 case ATH11K_HTC_SVC_ID_IPA_TX: 414 return "IPA TX"; 415 case ATH11K_HTC_SVC_ID_PKT_LOG: 416 return "PKT LOG"; 417 } 418 419 return "Unknown"; 420 } 421 422 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 423 { 424 struct ath11k_htc_ep *ep; 425 int i; 426 427 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 428 ep = &htc->endpoint[i]; 429 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 430 ep->max_ep_message_len = 0; 431 ep->max_tx_queue_depth = 0; 432 ep->eid = i; 433 ep->htc = htc; 434 ep->tx_credit_flow_enabled = true; 435 } 436 } 437 438 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 439 u16 service_id) 440 { 441 u8 i, allocation = 0; 442 443 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 444 if (htc->service_alloc_table[i].service_id == service_id) { 445 allocation = 446 htc->service_alloc_table[i].credit_allocation; 447 } 448 } 449 450 return allocation; 451 } 452 453 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 454 { 455 struct ath11k_htc_svc_tx_credits *serv_entry; 456 u32 svc_id[] = { 457 ATH11K_HTC_SVC_ID_WMI_CONTROL, 458 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 459 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 460 }; 461 int i, credits; 462 463 credits = htc->total_transmit_credits; 464 serv_entry = htc->service_alloc_table; 465 466 if ((htc->wmi_ep_count == 0) || 467 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 468 return -EINVAL; 469 470 /* Divide credits among number of endpoints for WMI */ 471 credits = credits / htc->wmi_ep_count; 472 for (i = 0; i < htc->wmi_ep_count; i++) { 473 serv_entry[i].service_id = svc_id[i]; 474 serv_entry[i].credit_allocation = credits; 475 } 476 477 return 0; 478 } 479 480 int ath11k_htc_wait_target(struct ath11k_htc *htc) 481 { 482 int i, status = 0; 483 struct ath11k_base *ab = htc->ab; 484 unsigned long time_left; 485 struct ath11k_htc_ready *ready; 486 u16 message_id; 487 u16 credit_count; 488 u16 credit_size; 489 490 time_left = wait_for_completion_timeout(&htc->ctl_resp, 491 ATH11K_HTC_WAIT_TIMEOUT_HZ); 492 if (!time_left) { 493 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 494 495 for (i = 0; i < ab->hw_params.ce_count; i++) 496 ath11k_ce_per_engine_service(htc->ab, i); 497 498 time_left = 499 wait_for_completion_timeout(&htc->ctl_resp, 500 ATH11K_HTC_WAIT_TIMEOUT_HZ); 501 502 if (!time_left) 503 status = -ETIMEDOUT; 504 } 505 506 if (status < 0) { 507 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 508 return status; 509 } 510 511 if (htc->control_resp_len < sizeof(*ready)) { 512 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 513 htc->control_resp_len); 514 return -ECOMM; 515 } 516 517 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 518 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 519 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 520 ready->id_credit_count); 521 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 522 523 if (message_id != ATH11K_HTC_MSG_READY_ID) { 524 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 525 return -ECOMM; 526 } 527 528 htc->total_transmit_credits = credit_count; 529 htc->target_credit_size = credit_size; 530 531 ath11k_dbg(ab, ATH11K_DBG_HTC, 532 "Target ready! transmit resources: %d size:%d\n", 533 htc->total_transmit_credits, htc->target_credit_size); 534 535 if ((htc->total_transmit_credits == 0) || 536 (htc->target_credit_size == 0)) { 537 ath11k_warn(ab, "Invalid credit size received\n"); 538 return -ECOMM; 539 } 540 541 /* For QCA6390, wmi endpoint uses 1 credit to avoid 542 * back-to-back write. 543 */ 544 if (ab->hw_params.supports_shadow_regs) 545 htc->total_transmit_credits = 1; 546 547 ath11k_htc_setup_target_buffer_assignments(htc); 548 549 return 0; 550 } 551 552 int ath11k_htc_connect_service(struct ath11k_htc *htc, 553 struct ath11k_htc_svc_conn_req *conn_req, 554 struct ath11k_htc_svc_conn_resp *conn_resp) 555 { 556 struct ath11k_base *ab = htc->ab; 557 struct ath11k_htc_conn_svc *req_msg; 558 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 559 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 560 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 561 struct ath11k_htc_ep *ep; 562 struct sk_buff *skb; 563 unsigned int max_msg_size = 0; 564 int length, status; 565 unsigned long time_left; 566 bool disable_credit_flow_ctrl = false; 567 u16 message_id, service_id, flags = 0; 568 u8 tx_alloc = 0; 569 570 /* special case for HTC pseudo control service */ 571 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 572 disable_credit_flow_ctrl = true; 573 assigned_eid = ATH11K_HTC_EP_0; 574 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 575 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 576 goto setup; 577 } 578 579 tx_alloc = ath11k_htc_get_credit_allocation(htc, 580 conn_req->service_id); 581 if (!tx_alloc) 582 ath11k_dbg(ab, ATH11K_DBG_BOOT, 583 "boot htc service %s does not allocate target credits\n", 584 htc_service_name(conn_req->service_id)); 585 586 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 587 if (!skb) { 588 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 589 return -ENOMEM; 590 } 591 592 length = sizeof(*req_msg); 593 skb_put(skb, length); 594 memset(skb->data, 0, length); 595 596 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 597 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 598 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 599 600 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 601 602 /* Only enable credit flow control for WMI ctrl service */ 603 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 604 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 605 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 606 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 607 disable_credit_flow_ctrl = true; 608 } 609 610 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 611 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 612 conn_req->service_id); 613 614 reinit_completion(&htc->ctl_resp); 615 616 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 617 if (status) { 618 kfree_skb(skb); 619 return status; 620 } 621 622 /* wait for response */ 623 time_left = wait_for_completion_timeout(&htc->ctl_resp, 624 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 625 if (!time_left) { 626 ath11k_err(ab, "Service connect timeout\n"); 627 return -ETIMEDOUT; 628 } 629 630 /* we controlled the buffer creation, it's aligned */ 631 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 632 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 633 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 634 resp_msg->msg_svc_id); 635 636 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 637 (htc->control_resp_len < sizeof(*resp_msg))) { 638 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 639 return -EPROTO; 640 } 641 642 ath11k_dbg(ab, ATH11K_DBG_HTC, 643 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 644 htc_service_name(service_id), 645 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 646 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 647 648 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 649 resp_msg->flags_len); 650 651 /* check response status */ 652 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 653 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 654 htc_service_name(service_id), 655 conn_resp->connect_resp_code); 656 return -EPROTO; 657 } 658 659 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 660 HTC_SVC_RESP_MSG_ENDPOINTID, 661 resp_msg->flags_len); 662 663 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 664 resp_msg->flags_len); 665 666 setup: 667 668 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 669 return -EPROTO; 670 671 if (max_msg_size == 0) 672 return -EPROTO; 673 674 ep = &htc->endpoint[assigned_eid]; 675 ep->eid = assigned_eid; 676 677 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 678 return -EPROTO; 679 680 /* return assigned endpoint to caller */ 681 conn_resp->eid = assigned_eid; 682 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 683 resp_msg->flags_len); 684 685 /* setup the endpoint */ 686 ep->service_id = conn_req->service_id; 687 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 688 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 689 resp_msg->flags_len); 690 ep->tx_credits = tx_alloc; 691 692 /* copy all the callbacks */ 693 ep->ep_ops = conn_req->ep_ops; 694 695 status = ath11k_hif_map_service_to_pipe(htc->ab, 696 ep->service_id, 697 &ep->ul_pipe_id, 698 &ep->dl_pipe_id); 699 if (status) 700 return status; 701 702 ath11k_dbg(ab, ATH11K_DBG_BOOT, 703 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 704 htc_service_name(ep->service_id), ep->ul_pipe_id, 705 ep->dl_pipe_id, ep->eid); 706 707 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 708 ep->tx_credit_flow_enabled = false; 709 ath11k_dbg(ab, ATH11K_DBG_BOOT, 710 "boot htc service '%s' eid %d TX flow control disabled\n", 711 htc_service_name(ep->service_id), assigned_eid); 712 } 713 714 return status; 715 } 716 717 int ath11k_htc_start(struct ath11k_htc *htc) 718 { 719 struct sk_buff *skb; 720 int status = 0; 721 struct ath11k_base *ab = htc->ab; 722 struct ath11k_htc_setup_complete_extended *msg; 723 724 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 725 if (!skb) 726 return -ENOMEM; 727 728 skb_put(skb, sizeof(*msg)); 729 memset(skb->data, 0, skb->len); 730 731 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 732 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 733 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 734 735 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 736 737 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 738 if (status) { 739 kfree_skb(skb); 740 return status; 741 } 742 743 return 0; 744 } 745 746 int ath11k_htc_init(struct ath11k_base *ab) 747 { 748 struct ath11k_htc *htc = &ab->htc; 749 struct ath11k_htc_svc_conn_req conn_req; 750 struct ath11k_htc_svc_conn_resp conn_resp; 751 int ret; 752 753 spin_lock_init(&htc->tx_lock); 754 755 ath11k_htc_reset_endpoint_states(htc); 756 757 htc->ab = ab; 758 759 switch (ab->wmi_ab.preferred_hw_mode) { 760 case WMI_HOST_HW_MODE_SINGLE: 761 htc->wmi_ep_count = 1; 762 break; 763 case WMI_HOST_HW_MODE_DBS: 764 case WMI_HOST_HW_MODE_DBS_OR_SBS: 765 htc->wmi_ep_count = 2; 766 break; 767 case WMI_HOST_HW_MODE_DBS_SBS: 768 htc->wmi_ep_count = 3; 769 break; 770 default: 771 htc->wmi_ep_count = ab->hw_params.max_radios; 772 break; 773 } 774 775 /* setup our pseudo HTC control endpoint connection */ 776 memset(&conn_req, 0, sizeof(conn_req)); 777 memset(&conn_resp, 0, sizeof(conn_resp)); 778 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 779 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 780 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 781 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 782 783 /* connect fake service */ 784 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 785 if (ret) { 786 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 787 return ret; 788 } 789 790 init_completion(&htc->ctl_resp); 791 792 return 0; 793 } 794