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 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 276 struct sk_buff *skb) 277 { 278 int status = 0; 279 struct ath11k_htc *htc = &ab->htc; 280 struct ath11k_htc_hdr *hdr; 281 struct ath11k_htc_ep *ep; 282 u16 payload_len; 283 u32 trailer_len = 0; 284 size_t min_len; 285 u8 eid; 286 bool trailer_present; 287 288 hdr = (struct ath11k_htc_hdr *)skb->data; 289 skb_pull(skb, sizeof(*hdr)); 290 291 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 292 293 if (eid >= ATH11K_HTC_EP_COUNT) { 294 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 295 goto out; 296 } 297 298 ep = &htc->endpoint[eid]; 299 300 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 301 302 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 303 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 304 payload_len + sizeof(*hdr)); 305 goto out; 306 } 307 308 if (skb->len < payload_len) { 309 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 310 skb->len, payload_len); 311 goto out; 312 } 313 314 /* get flags to check for trailer */ 315 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 316 ATH11K_HTC_FLAG_TRAILER_PRESENT; 317 318 if (trailer_present) { 319 u8 *trailer; 320 321 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 322 min_len = sizeof(struct ath11k_htc_record_hdr); 323 324 if ((trailer_len < min_len) || 325 (trailer_len > payload_len)) { 326 ath11k_warn(ab, "Invalid trailer length: %d\n", 327 trailer_len); 328 goto out; 329 } 330 331 trailer = (u8 *)hdr; 332 trailer += sizeof(*hdr); 333 trailer += payload_len; 334 trailer -= trailer_len; 335 status = ath11k_htc_process_trailer(htc, trailer, 336 trailer_len, eid); 337 if (status) 338 goto out; 339 340 skb_trim(skb, skb->len - trailer_len); 341 } 342 343 if (trailer_len >= payload_len) 344 /* zero length packet with trailer data, just drop these */ 345 goto out; 346 347 if (eid == ATH11K_HTC_EP_0) { 348 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 349 350 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 351 case ATH11K_HTC_MSG_READY_ID: 352 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 353 /* handle HTC control message */ 354 if (completion_done(&htc->ctl_resp)) { 355 /* this is a fatal error, target should not be 356 * sending unsolicited messages on the ep 0 357 */ 358 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 359 complete(&htc->ctl_resp); 360 goto out; 361 } 362 363 htc->control_resp_len = 364 min_t(int, skb->len, 365 ATH11K_HTC_MAX_CTRL_MSG_LEN); 366 367 memcpy(htc->control_resp_buffer, skb->data, 368 htc->control_resp_len); 369 370 complete(&htc->ctl_resp); 371 break; 372 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 373 ath11k_htc_suspend_complete(ab, true); 374 break; 375 case ATH11K_HTC_MSG_NACK_SUSPEND: 376 ath11k_htc_suspend_complete(ab, false); 377 break; 378 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 379 break; 380 default: 381 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 382 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 383 break; 384 } 385 goto out; 386 } 387 388 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 389 eid, skb); 390 ep->ep_ops.ep_rx_complete(ab, skb); 391 392 /* poll tx completion for interrupt disabled CE's */ 393 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 394 395 /* skb is now owned by the rx completion handler */ 396 skb = NULL; 397 out: 398 kfree_skb(skb); 399 } 400 401 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 402 struct sk_buff *skb) 403 { 404 /* This is unexpected. FW is not supposed to send regular rx on this 405 * endpoint. 406 */ 407 ath11k_warn(ab, "unexpected htc rx\n"); 408 kfree_skb(skb); 409 } 410 411 static const char *htc_service_name(enum ath11k_htc_svc_id id) 412 { 413 switch (id) { 414 case ATH11K_HTC_SVC_ID_RESERVED: 415 return "Reserved"; 416 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 417 return "Control"; 418 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 419 return "WMI"; 420 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 421 return "DATA BE"; 422 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 423 return "DATA BK"; 424 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 425 return "DATA VI"; 426 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 427 return "DATA VO"; 428 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 429 return "WMI MAC1"; 430 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 431 return "WMI MAC2"; 432 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 433 return "NMI Control"; 434 case ATH11K_HTC_SVC_ID_NMI_DATA: 435 return "NMI Data"; 436 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 437 return "HTT Data"; 438 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 439 return "RAW"; 440 case ATH11K_HTC_SVC_ID_IPA_TX: 441 return "IPA TX"; 442 case ATH11K_HTC_SVC_ID_PKT_LOG: 443 return "PKT LOG"; 444 } 445 446 return "Unknown"; 447 } 448 449 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 450 { 451 struct ath11k_htc_ep *ep; 452 int i; 453 454 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 455 ep = &htc->endpoint[i]; 456 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 457 ep->max_ep_message_len = 0; 458 ep->max_tx_queue_depth = 0; 459 ep->eid = i; 460 ep->htc = htc; 461 ep->tx_credit_flow_enabled = true; 462 } 463 } 464 465 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 466 u16 service_id) 467 { 468 u8 i, allocation = 0; 469 470 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 471 if (htc->service_alloc_table[i].service_id == service_id) { 472 allocation = 473 htc->service_alloc_table[i].credit_allocation; 474 } 475 } 476 477 return allocation; 478 } 479 480 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 481 { 482 struct ath11k_htc_svc_tx_credits *serv_entry; 483 u32 svc_id[] = { 484 ATH11K_HTC_SVC_ID_WMI_CONTROL, 485 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 486 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 487 }; 488 int i, credits; 489 490 credits = htc->total_transmit_credits; 491 serv_entry = htc->service_alloc_table; 492 493 if ((htc->wmi_ep_count == 0) || 494 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 495 return -EINVAL; 496 497 /* Divide credits among number of endpoints for WMI */ 498 credits = credits / htc->wmi_ep_count; 499 for (i = 0; i < htc->wmi_ep_count; i++) { 500 serv_entry[i].service_id = svc_id[i]; 501 serv_entry[i].credit_allocation = credits; 502 } 503 504 return 0; 505 } 506 507 int ath11k_htc_wait_target(struct ath11k_htc *htc) 508 { 509 int i, status = 0; 510 struct ath11k_base *ab = htc->ab; 511 unsigned long time_left; 512 struct ath11k_htc_ready *ready; 513 u16 message_id; 514 u16 credit_count; 515 u16 credit_size; 516 517 time_left = wait_for_completion_timeout(&htc->ctl_resp, 518 ATH11K_HTC_WAIT_TIMEOUT_HZ); 519 if (!time_left) { 520 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 521 522 for (i = 0; i < ab->hw_params.ce_count; i++) 523 ath11k_ce_per_engine_service(htc->ab, i); 524 525 time_left = 526 wait_for_completion_timeout(&htc->ctl_resp, 527 ATH11K_HTC_WAIT_TIMEOUT_HZ); 528 529 if (!time_left) 530 status = -ETIMEDOUT; 531 } 532 533 if (status < 0) { 534 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 535 return status; 536 } 537 538 if (htc->control_resp_len < sizeof(*ready)) { 539 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 540 htc->control_resp_len); 541 return -ECOMM; 542 } 543 544 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 545 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 546 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 547 ready->id_credit_count); 548 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 549 550 if (message_id != ATH11K_HTC_MSG_READY_ID) { 551 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 552 return -ECOMM; 553 } 554 555 htc->total_transmit_credits = credit_count; 556 htc->target_credit_size = credit_size; 557 558 ath11k_dbg(ab, ATH11K_DBG_HTC, 559 "Target ready! transmit resources: %d size:%d\n", 560 htc->total_transmit_credits, htc->target_credit_size); 561 562 if ((htc->total_transmit_credits == 0) || 563 (htc->target_credit_size == 0)) { 564 ath11k_warn(ab, "Invalid credit size received\n"); 565 return -ECOMM; 566 } 567 568 /* For QCA6390, wmi endpoint uses 1 credit to avoid 569 * back-to-back write. 570 */ 571 if (ab->hw_params.supports_shadow_regs) 572 htc->total_transmit_credits = 1; 573 574 ath11k_htc_setup_target_buffer_assignments(htc); 575 576 return 0; 577 } 578 579 int ath11k_htc_connect_service(struct ath11k_htc *htc, 580 struct ath11k_htc_svc_conn_req *conn_req, 581 struct ath11k_htc_svc_conn_resp *conn_resp) 582 { 583 struct ath11k_base *ab = htc->ab; 584 struct ath11k_htc_conn_svc *req_msg; 585 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 586 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 587 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 588 struct ath11k_htc_ep *ep; 589 struct sk_buff *skb; 590 unsigned int max_msg_size = 0; 591 int length, status; 592 unsigned long time_left; 593 bool disable_credit_flow_ctrl = false; 594 u16 message_id, service_id, flags = 0; 595 u8 tx_alloc = 0; 596 597 /* special case for HTC pseudo control service */ 598 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 599 disable_credit_flow_ctrl = true; 600 assigned_eid = ATH11K_HTC_EP_0; 601 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 602 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 603 goto setup; 604 } 605 606 tx_alloc = ath11k_htc_get_credit_allocation(htc, 607 conn_req->service_id); 608 if (!tx_alloc) 609 ath11k_dbg(ab, ATH11K_DBG_BOOT, 610 "boot htc service %s does not allocate target credits\n", 611 htc_service_name(conn_req->service_id)); 612 613 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 614 if (!skb) { 615 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 616 return -ENOMEM; 617 } 618 619 length = sizeof(*req_msg); 620 skb_put(skb, length); 621 memset(skb->data, 0, length); 622 623 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 624 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 625 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 626 627 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 628 629 /* Only enable credit flow control for WMI ctrl service */ 630 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 631 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 632 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 633 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 634 disable_credit_flow_ctrl = true; 635 } 636 637 if (!ab->hw_params.credit_flow) { 638 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 639 disable_credit_flow_ctrl = true; 640 } 641 642 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 643 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 644 conn_req->service_id); 645 646 reinit_completion(&htc->ctl_resp); 647 648 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 649 if (status) { 650 kfree_skb(skb); 651 return status; 652 } 653 654 /* wait for response */ 655 time_left = wait_for_completion_timeout(&htc->ctl_resp, 656 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 657 if (!time_left) { 658 ath11k_err(ab, "Service connect timeout\n"); 659 return -ETIMEDOUT; 660 } 661 662 /* we controlled the buffer creation, it's aligned */ 663 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 664 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 665 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 666 resp_msg->msg_svc_id); 667 668 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 669 (htc->control_resp_len < sizeof(*resp_msg))) { 670 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 671 return -EPROTO; 672 } 673 674 ath11k_dbg(ab, ATH11K_DBG_HTC, 675 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 676 htc_service_name(service_id), 677 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 678 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 679 680 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 681 resp_msg->flags_len); 682 683 /* check response status */ 684 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 685 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 686 htc_service_name(service_id), 687 conn_resp->connect_resp_code); 688 return -EPROTO; 689 } 690 691 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 692 HTC_SVC_RESP_MSG_ENDPOINTID, 693 resp_msg->flags_len); 694 695 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 696 resp_msg->flags_len); 697 698 setup: 699 700 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 701 return -EPROTO; 702 703 if (max_msg_size == 0) 704 return -EPROTO; 705 706 ep = &htc->endpoint[assigned_eid]; 707 ep->eid = assigned_eid; 708 709 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 710 return -EPROTO; 711 712 /* return assigned endpoint to caller */ 713 conn_resp->eid = assigned_eid; 714 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 715 resp_msg->flags_len); 716 717 /* setup the endpoint */ 718 ep->service_id = conn_req->service_id; 719 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 720 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 721 resp_msg->flags_len); 722 ep->tx_credits = tx_alloc; 723 724 /* copy all the callbacks */ 725 ep->ep_ops = conn_req->ep_ops; 726 727 status = ath11k_hif_map_service_to_pipe(htc->ab, 728 ep->service_id, 729 &ep->ul_pipe_id, 730 &ep->dl_pipe_id); 731 if (status) 732 return status; 733 734 ath11k_dbg(ab, ATH11K_DBG_BOOT, 735 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 736 htc_service_name(ep->service_id), ep->ul_pipe_id, 737 ep->dl_pipe_id, ep->eid); 738 739 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 740 ep->tx_credit_flow_enabled = false; 741 ath11k_dbg(ab, ATH11K_DBG_BOOT, 742 "boot htc service '%s' eid %d TX flow control disabled\n", 743 htc_service_name(ep->service_id), assigned_eid); 744 } 745 746 return status; 747 } 748 749 int ath11k_htc_start(struct ath11k_htc *htc) 750 { 751 struct sk_buff *skb; 752 int status = 0; 753 struct ath11k_base *ab = htc->ab; 754 struct ath11k_htc_setup_complete_extended *msg; 755 756 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 757 if (!skb) 758 return -ENOMEM; 759 760 skb_put(skb, sizeof(*msg)); 761 memset(skb->data, 0, skb->len); 762 763 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 764 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 765 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 766 767 if (ab->hw_params.credit_flow) 768 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 769 else 770 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW; 771 772 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 773 if (status) { 774 kfree_skb(skb); 775 return status; 776 } 777 778 return 0; 779 } 780 781 int ath11k_htc_init(struct ath11k_base *ab) 782 { 783 struct ath11k_htc *htc = &ab->htc; 784 struct ath11k_htc_svc_conn_req conn_req; 785 struct ath11k_htc_svc_conn_resp conn_resp; 786 int ret; 787 788 spin_lock_init(&htc->tx_lock); 789 790 ath11k_htc_reset_endpoint_states(htc); 791 792 htc->ab = ab; 793 794 switch (ab->wmi_ab.preferred_hw_mode) { 795 case WMI_HOST_HW_MODE_SINGLE: 796 htc->wmi_ep_count = 1; 797 break; 798 case WMI_HOST_HW_MODE_DBS: 799 case WMI_HOST_HW_MODE_DBS_OR_SBS: 800 htc->wmi_ep_count = 2; 801 break; 802 case WMI_HOST_HW_MODE_DBS_SBS: 803 htc->wmi_ep_count = 3; 804 break; 805 default: 806 htc->wmi_ep_count = ab->hw_params.max_radios; 807 break; 808 } 809 810 /* setup our pseudo HTC control endpoint connection */ 811 memset(&conn_req, 0, sizeof(conn_req)); 812 memset(&conn_resp, 0, sizeof(conn_resp)); 813 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 814 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 815 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 816 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 817 818 /* connect fake service */ 819 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 820 if (ret) { 821 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 822 return ret; 823 } 824 825 init_completion(&htc->ctl_resp); 826 827 return 0; 828 } 829