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 bool credit_flow_enabled = (ab->hw_params.credit_flow && 85 ep->tx_credit_flow_enabled); 86 87 if (eid >= ATH11K_HTC_EP_COUNT) { 88 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); 89 return -ENOENT; 90 } 91 92 skb_push(skb, sizeof(struct ath11k_htc_hdr)); 93 94 if (credit_flow_enabled) { 95 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 96 spin_lock_bh(&htc->tx_lock); 97 if (ep->tx_credits < credits) { 98 ath11k_dbg(ab, ATH11K_DBG_HTC, 99 "htc insufficient credits ep %d required %d available %d\n", 100 eid, credits, ep->tx_credits); 101 spin_unlock_bh(&htc->tx_lock); 102 ret = -EAGAIN; 103 goto err_pull; 104 } 105 ep->tx_credits -= credits; 106 ath11k_dbg(ab, ATH11K_DBG_HTC, 107 "htc ep %d consumed %d credits (total %d)\n", 108 eid, credits, ep->tx_credits); 109 spin_unlock_bh(&htc->tx_lock); 110 } 111 112 ath11k_htc_prepare_tx_skb(ep, skb); 113 114 skb_cb->eid = eid; 115 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 116 ret = dma_mapping_error(dev, skb_cb->paddr); 117 if (ret) { 118 ret = -EIO; 119 goto err_credits; 120 } 121 122 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 123 if (ret) 124 goto err_unmap; 125 126 return 0; 127 128 err_unmap: 129 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 130 err_credits: 131 if (credit_flow_enabled) { 132 spin_lock_bh(&htc->tx_lock); 133 ep->tx_credits += credits; 134 ath11k_dbg(ab, ATH11K_DBG_HTC, 135 "htc ep %d reverted %d credits back (total %d)\n", 136 eid, credits, ep->tx_credits); 137 spin_unlock_bh(&htc->tx_lock); 138 139 if (ep->ep_ops.ep_tx_credits) 140 ep->ep_ops.ep_tx_credits(htc->ab); 141 } 142 err_pull: 143 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 144 return ret; 145 } 146 147 static void 148 ath11k_htc_process_credit_report(struct ath11k_htc *htc, 149 const struct ath11k_htc_credit_report *report, 150 int len, 151 enum ath11k_htc_ep_id eid) 152 { 153 struct ath11k_base *ab = htc->ab; 154 struct ath11k_htc_ep *ep; 155 int i, n_reports; 156 157 if (len % sizeof(*report)) 158 ath11k_warn(ab, "Uneven credit report len %d", len); 159 160 n_reports = len / sizeof(*report); 161 162 spin_lock_bh(&htc->tx_lock); 163 for (i = 0; i < n_reports; i++, report++) { 164 if (report->eid >= ATH11K_HTC_EP_COUNT) 165 break; 166 167 ep = &htc->endpoint[report->eid]; 168 ep->tx_credits += report->credits; 169 170 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 171 report->eid, report->credits, ep->tx_credits); 172 173 if (ep->ep_ops.ep_tx_credits) { 174 spin_unlock_bh(&htc->tx_lock); 175 ep->ep_ops.ep_tx_credits(htc->ab); 176 spin_lock_bh(&htc->tx_lock); 177 } 178 } 179 spin_unlock_bh(&htc->tx_lock); 180 } 181 182 static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 183 u8 *buffer, 184 int length, 185 enum ath11k_htc_ep_id src_eid) 186 { 187 struct ath11k_base *ab = htc->ab; 188 int status = 0; 189 struct ath11k_htc_record *record; 190 size_t len; 191 192 while (length > 0) { 193 record = (struct ath11k_htc_record *)buffer; 194 195 if (length < sizeof(record->hdr)) { 196 status = -EINVAL; 197 break; 198 } 199 200 if (record->hdr.len > length) { 201 /* no room left in buffer for record */ 202 ath11k_warn(ab, "Invalid record length: %d\n", 203 record->hdr.len); 204 status = -EINVAL; 205 break; 206 } 207 208 if (ab->hw_params.credit_flow) { 209 switch (record->hdr.id) { 210 case ATH11K_HTC_RECORD_CREDITS: 211 len = sizeof(struct ath11k_htc_credit_report); 212 if (record->hdr.len < len) { 213 ath11k_warn(ab, "Credit report too long\n"); 214 status = -EINVAL; 215 break; 216 } 217 ath11k_htc_process_credit_report(htc, 218 record->credit_report, 219 record->hdr.len, 220 src_eid); 221 break; 222 default: 223 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 224 record->hdr.id, record->hdr.len); 225 break; 226 } 227 } 228 229 if (status) 230 break; 231 232 /* multiple records may be present in a trailer */ 233 buffer += sizeof(record->hdr) + record->hdr.len; 234 length -= sizeof(record->hdr) + record->hdr.len; 235 } 236 237 return status; 238 } 239 240 static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack) 241 { 242 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot suspend complete %d\n", ack); 243 244 if (ack) 245 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 246 else 247 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 248 249 complete(&ab->htc_suspend); 250 } 251 252 void ath11k_htc_tx_completion_handler(struct ath11k_base *ab, 253 struct sk_buff *skb) 254 { 255 struct ath11k_htc *htc = &ab->htc; 256 struct ath11k_htc_ep *ep; 257 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *); 258 u8 eid; 259 260 eid = ATH11K_SKB_CB(skb)->eid; 261 if (eid >= ATH11K_HTC_EP_COUNT) 262 return; 263 264 ep = &htc->endpoint[eid]; 265 spin_lock_bh(&htc->tx_lock); 266 ep_tx_complete = ep->ep_ops.ep_tx_complete; 267 spin_unlock_bh(&htc->tx_lock); 268 if (!ep_tx_complete) { 269 dev_kfree_skb_any(skb); 270 return; 271 } 272 ep_tx_complete(htc->ab, skb); 273 } 274 275 static void ath11k_htc_wakeup_from_suspend(struct ath11k_base *ab) 276 { 277 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot wakeup from suspend is received\n"); 278 } 279 280 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 281 struct sk_buff *skb) 282 { 283 int status = 0; 284 struct ath11k_htc *htc = &ab->htc; 285 struct ath11k_htc_hdr *hdr; 286 struct ath11k_htc_ep *ep; 287 u16 payload_len; 288 u32 trailer_len = 0; 289 size_t min_len; 290 u8 eid; 291 bool trailer_present; 292 293 hdr = (struct ath11k_htc_hdr *)skb->data; 294 skb_pull(skb, sizeof(*hdr)); 295 296 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 297 298 if (eid >= ATH11K_HTC_EP_COUNT) { 299 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 300 goto out; 301 } 302 303 ep = &htc->endpoint[eid]; 304 305 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 306 307 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 308 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 309 payload_len + sizeof(*hdr)); 310 goto out; 311 } 312 313 if (skb->len < payload_len) { 314 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 315 skb->len, payload_len); 316 goto out; 317 } 318 319 /* get flags to check for trailer */ 320 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 321 ATH11K_HTC_FLAG_TRAILER_PRESENT; 322 323 if (trailer_present) { 324 u8 *trailer; 325 326 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 327 min_len = sizeof(struct ath11k_htc_record_hdr); 328 329 if ((trailer_len < min_len) || 330 (trailer_len > payload_len)) { 331 ath11k_warn(ab, "Invalid trailer length: %d\n", 332 trailer_len); 333 goto out; 334 } 335 336 trailer = (u8 *)hdr; 337 trailer += sizeof(*hdr); 338 trailer += payload_len; 339 trailer -= trailer_len; 340 status = ath11k_htc_process_trailer(htc, trailer, 341 trailer_len, eid); 342 if (status) 343 goto out; 344 345 skb_trim(skb, skb->len - trailer_len); 346 } 347 348 if (trailer_len >= payload_len) 349 /* zero length packet with trailer data, just drop these */ 350 goto out; 351 352 if (eid == ATH11K_HTC_EP_0) { 353 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 354 355 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 356 case ATH11K_HTC_MSG_READY_ID: 357 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 358 /* handle HTC control message */ 359 if (completion_done(&htc->ctl_resp)) { 360 /* this is a fatal error, target should not be 361 * sending unsolicited messages on the ep 0 362 */ 363 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 364 complete(&htc->ctl_resp); 365 goto out; 366 } 367 368 htc->control_resp_len = 369 min_t(int, skb->len, 370 ATH11K_HTC_MAX_CTRL_MSG_LEN); 371 372 memcpy(htc->control_resp_buffer, skb->data, 373 htc->control_resp_len); 374 375 complete(&htc->ctl_resp); 376 break; 377 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 378 ath11k_htc_suspend_complete(ab, true); 379 break; 380 case ATH11K_HTC_MSG_NACK_SUSPEND: 381 ath11k_htc_suspend_complete(ab, false); 382 break; 383 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 384 ath11k_htc_wakeup_from_suspend(ab); 385 break; 386 default: 387 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 388 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 389 break; 390 } 391 goto out; 392 } 393 394 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 395 eid, skb); 396 ep->ep_ops.ep_rx_complete(ab, skb); 397 398 /* poll tx completion for interrupt disabled CE's */ 399 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 400 401 /* skb is now owned by the rx completion handler */ 402 skb = NULL; 403 out: 404 kfree_skb(skb); 405 } 406 407 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 408 struct sk_buff *skb) 409 { 410 /* This is unexpected. FW is not supposed to send regular rx on this 411 * endpoint. 412 */ 413 ath11k_warn(ab, "unexpected htc rx\n"); 414 kfree_skb(skb); 415 } 416 417 static const char *htc_service_name(enum ath11k_htc_svc_id id) 418 { 419 switch (id) { 420 case ATH11K_HTC_SVC_ID_RESERVED: 421 return "Reserved"; 422 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 423 return "Control"; 424 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 425 return "WMI"; 426 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 427 return "DATA BE"; 428 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 429 return "DATA BK"; 430 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 431 return "DATA VI"; 432 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 433 return "DATA VO"; 434 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 435 return "WMI MAC1"; 436 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 437 return "WMI MAC2"; 438 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 439 return "NMI Control"; 440 case ATH11K_HTC_SVC_ID_NMI_DATA: 441 return "NMI Data"; 442 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 443 return "HTT Data"; 444 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 445 return "RAW"; 446 case ATH11K_HTC_SVC_ID_IPA_TX: 447 return "IPA TX"; 448 case ATH11K_HTC_SVC_ID_PKT_LOG: 449 return "PKT LOG"; 450 } 451 452 return "Unknown"; 453 } 454 455 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 456 { 457 struct ath11k_htc_ep *ep; 458 int i; 459 460 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 461 ep = &htc->endpoint[i]; 462 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 463 ep->max_ep_message_len = 0; 464 ep->max_tx_queue_depth = 0; 465 ep->eid = i; 466 ep->htc = htc; 467 ep->tx_credit_flow_enabled = true; 468 } 469 } 470 471 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 472 u16 service_id) 473 { 474 u8 i, allocation = 0; 475 476 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 477 if (htc->service_alloc_table[i].service_id == service_id) { 478 allocation = 479 htc->service_alloc_table[i].credit_allocation; 480 } 481 } 482 483 return allocation; 484 } 485 486 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 487 { 488 struct ath11k_htc_svc_tx_credits *serv_entry; 489 u32 svc_id[] = { 490 ATH11K_HTC_SVC_ID_WMI_CONTROL, 491 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 492 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 493 }; 494 int i, credits; 495 496 credits = htc->total_transmit_credits; 497 serv_entry = htc->service_alloc_table; 498 499 if ((htc->wmi_ep_count == 0) || 500 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 501 return -EINVAL; 502 503 /* Divide credits among number of endpoints for WMI */ 504 credits = credits / htc->wmi_ep_count; 505 for (i = 0; i < htc->wmi_ep_count; i++) { 506 serv_entry[i].service_id = svc_id[i]; 507 serv_entry[i].credit_allocation = credits; 508 } 509 510 return 0; 511 } 512 513 int ath11k_htc_wait_target(struct ath11k_htc *htc) 514 { 515 int i, status = 0; 516 struct ath11k_base *ab = htc->ab; 517 unsigned long time_left; 518 struct ath11k_htc_ready *ready; 519 u16 message_id; 520 u16 credit_count; 521 u16 credit_size; 522 523 time_left = wait_for_completion_timeout(&htc->ctl_resp, 524 ATH11K_HTC_WAIT_TIMEOUT_HZ); 525 if (!time_left) { 526 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 527 528 for (i = 0; i < ab->hw_params.ce_count; i++) 529 ath11k_ce_per_engine_service(htc->ab, i); 530 531 time_left = 532 wait_for_completion_timeout(&htc->ctl_resp, 533 ATH11K_HTC_WAIT_TIMEOUT_HZ); 534 535 if (!time_left) 536 status = -ETIMEDOUT; 537 } 538 539 if (status < 0) { 540 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 541 return status; 542 } 543 544 if (htc->control_resp_len < sizeof(*ready)) { 545 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 546 htc->control_resp_len); 547 return -ECOMM; 548 } 549 550 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 551 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 552 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 553 ready->id_credit_count); 554 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 555 556 if (message_id != ATH11K_HTC_MSG_READY_ID) { 557 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 558 return -ECOMM; 559 } 560 561 htc->total_transmit_credits = credit_count; 562 htc->target_credit_size = credit_size; 563 564 ath11k_dbg(ab, ATH11K_DBG_HTC, 565 "Target ready! transmit resources: %d size:%d\n", 566 htc->total_transmit_credits, htc->target_credit_size); 567 568 if ((htc->total_transmit_credits == 0) || 569 (htc->target_credit_size == 0)) { 570 ath11k_warn(ab, "Invalid credit size received\n"); 571 return -ECOMM; 572 } 573 574 /* For QCA6390, wmi endpoint uses 1 credit to avoid 575 * back-to-back write. 576 */ 577 if (ab->hw_params.supports_shadow_regs) 578 htc->total_transmit_credits = 1; 579 580 ath11k_htc_setup_target_buffer_assignments(htc); 581 582 return 0; 583 } 584 585 int ath11k_htc_connect_service(struct ath11k_htc *htc, 586 struct ath11k_htc_svc_conn_req *conn_req, 587 struct ath11k_htc_svc_conn_resp *conn_resp) 588 { 589 struct ath11k_base *ab = htc->ab; 590 struct ath11k_htc_conn_svc *req_msg; 591 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 592 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 593 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 594 struct ath11k_htc_ep *ep; 595 struct sk_buff *skb; 596 unsigned int max_msg_size = 0; 597 int length, status; 598 unsigned long time_left; 599 bool disable_credit_flow_ctrl = false; 600 u16 message_id, service_id, flags = 0; 601 u8 tx_alloc = 0; 602 603 /* special case for HTC pseudo control service */ 604 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 605 disable_credit_flow_ctrl = true; 606 assigned_eid = ATH11K_HTC_EP_0; 607 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 608 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 609 goto setup; 610 } 611 612 tx_alloc = ath11k_htc_get_credit_allocation(htc, 613 conn_req->service_id); 614 if (!tx_alloc) 615 ath11k_dbg(ab, ATH11K_DBG_BOOT, 616 "boot htc service %s does not allocate target credits\n", 617 htc_service_name(conn_req->service_id)); 618 619 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 620 if (!skb) { 621 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 622 return -ENOMEM; 623 } 624 625 length = sizeof(*req_msg); 626 skb_put(skb, length); 627 memset(skb->data, 0, length); 628 629 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 630 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 631 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 632 633 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 634 635 /* Only enable credit flow control for WMI ctrl service */ 636 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 637 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 638 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 639 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 640 disable_credit_flow_ctrl = true; 641 } 642 643 if (!ab->hw_params.credit_flow) { 644 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 645 disable_credit_flow_ctrl = true; 646 } 647 648 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 649 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 650 conn_req->service_id); 651 652 reinit_completion(&htc->ctl_resp); 653 654 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 655 if (status) { 656 kfree_skb(skb); 657 return status; 658 } 659 660 /* wait for response */ 661 time_left = wait_for_completion_timeout(&htc->ctl_resp, 662 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 663 if (!time_left) { 664 ath11k_err(ab, "Service connect timeout\n"); 665 return -ETIMEDOUT; 666 } 667 668 /* we controlled the buffer creation, it's aligned */ 669 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 670 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 671 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 672 resp_msg->msg_svc_id); 673 674 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 675 (htc->control_resp_len < sizeof(*resp_msg))) { 676 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 677 return -EPROTO; 678 } 679 680 ath11k_dbg(ab, ATH11K_DBG_HTC, 681 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 682 htc_service_name(service_id), 683 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 684 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 685 686 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 687 resp_msg->flags_len); 688 689 /* check response status */ 690 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 691 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 692 htc_service_name(service_id), 693 conn_resp->connect_resp_code); 694 return -EPROTO; 695 } 696 697 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 698 HTC_SVC_RESP_MSG_ENDPOINTID, 699 resp_msg->flags_len); 700 701 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 702 resp_msg->flags_len); 703 704 setup: 705 706 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 707 return -EPROTO; 708 709 if (max_msg_size == 0) 710 return -EPROTO; 711 712 ep = &htc->endpoint[assigned_eid]; 713 ep->eid = assigned_eid; 714 715 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 716 return -EPROTO; 717 718 /* return assigned endpoint to caller */ 719 conn_resp->eid = assigned_eid; 720 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 721 resp_msg->flags_len); 722 723 /* setup the endpoint */ 724 ep->service_id = conn_req->service_id; 725 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 726 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 727 resp_msg->flags_len); 728 ep->tx_credits = tx_alloc; 729 730 /* copy all the callbacks */ 731 ep->ep_ops = conn_req->ep_ops; 732 733 status = ath11k_hif_map_service_to_pipe(htc->ab, 734 ep->service_id, 735 &ep->ul_pipe_id, 736 &ep->dl_pipe_id); 737 if (status) 738 return status; 739 740 ath11k_dbg(ab, ATH11K_DBG_BOOT, 741 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 742 htc_service_name(ep->service_id), ep->ul_pipe_id, 743 ep->dl_pipe_id, ep->eid); 744 745 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 746 ep->tx_credit_flow_enabled = false; 747 ath11k_dbg(ab, ATH11K_DBG_BOOT, 748 "boot htc service '%s' eid %d TX flow control disabled\n", 749 htc_service_name(ep->service_id), assigned_eid); 750 } 751 752 return status; 753 } 754 755 int ath11k_htc_start(struct ath11k_htc *htc) 756 { 757 struct sk_buff *skb; 758 int status = 0; 759 struct ath11k_base *ab = htc->ab; 760 struct ath11k_htc_setup_complete_extended *msg; 761 762 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 763 if (!skb) 764 return -ENOMEM; 765 766 skb_put(skb, sizeof(*msg)); 767 memset(skb->data, 0, skb->len); 768 769 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 770 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 771 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 772 773 if (ab->hw_params.credit_flow) 774 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 775 else 776 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW; 777 778 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 779 if (status) { 780 kfree_skb(skb); 781 return status; 782 } 783 784 return 0; 785 } 786 787 int ath11k_htc_init(struct ath11k_base *ab) 788 { 789 struct ath11k_htc *htc = &ab->htc; 790 struct ath11k_htc_svc_conn_req conn_req; 791 struct ath11k_htc_svc_conn_resp conn_resp; 792 int ret; 793 794 spin_lock_init(&htc->tx_lock); 795 796 ath11k_htc_reset_endpoint_states(htc); 797 798 htc->ab = ab; 799 800 switch (ab->wmi_ab.preferred_hw_mode) { 801 case WMI_HOST_HW_MODE_SINGLE: 802 htc->wmi_ep_count = 1; 803 break; 804 case WMI_HOST_HW_MODE_DBS: 805 case WMI_HOST_HW_MODE_DBS_OR_SBS: 806 htc->wmi_ep_count = 2; 807 break; 808 case WMI_HOST_HW_MODE_DBS_SBS: 809 htc->wmi_ep_count = 3; 810 break; 811 default: 812 htc->wmi_ep_count = ab->hw_params.max_radios; 813 break; 814 } 815 816 /* setup our pseudo HTC control endpoint connection */ 817 memset(&conn_req, 0, sizeof(conn_req)); 818 memset(&conn_resp, 0, sizeof(conn_resp)); 819 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 820 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 821 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 822 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 823 824 /* connect fake service */ 825 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 826 if (ret) { 827 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 828 return ret; 829 } 830 831 init_completion(&htc->ctl_resp); 832 833 return 0; 834 } 835