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 dev_kfree_skb_any(skb); 263 return; 264 } 265 266 ep = &htc->endpoint[eid]; 267 spin_lock_bh(&htc->tx_lock); 268 ep_tx_complete = ep->ep_ops.ep_tx_complete; 269 spin_unlock_bh(&htc->tx_lock); 270 if (!ep_tx_complete) { 271 dev_kfree_skb_any(skb); 272 return; 273 } 274 ep_tx_complete(htc->ab, skb); 275 } 276 277 static void ath11k_htc_wakeup_from_suspend(struct ath11k_base *ab) 278 { 279 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot wakeup from suspend is received\n"); 280 } 281 282 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 283 struct sk_buff *skb) 284 { 285 int status = 0; 286 struct ath11k_htc *htc = &ab->htc; 287 struct ath11k_htc_hdr *hdr; 288 struct ath11k_htc_ep *ep; 289 u16 payload_len; 290 u32 trailer_len = 0; 291 size_t min_len; 292 u8 eid; 293 bool trailer_present; 294 295 hdr = (struct ath11k_htc_hdr *)skb->data; 296 skb_pull(skb, sizeof(*hdr)); 297 298 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 299 300 if (eid >= ATH11K_HTC_EP_COUNT) { 301 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 302 goto out; 303 } 304 305 ep = &htc->endpoint[eid]; 306 307 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 308 309 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 310 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 311 payload_len + sizeof(*hdr)); 312 goto out; 313 } 314 315 if (skb->len < payload_len) { 316 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 317 skb->len, payload_len); 318 goto out; 319 } 320 321 /* get flags to check for trailer */ 322 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 323 ATH11K_HTC_FLAG_TRAILER_PRESENT; 324 325 if (trailer_present) { 326 u8 *trailer; 327 328 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 329 min_len = sizeof(struct ath11k_htc_record_hdr); 330 331 if ((trailer_len < min_len) || 332 (trailer_len > payload_len)) { 333 ath11k_warn(ab, "Invalid trailer length: %d\n", 334 trailer_len); 335 goto out; 336 } 337 338 trailer = (u8 *)hdr; 339 trailer += sizeof(*hdr); 340 trailer += payload_len; 341 trailer -= trailer_len; 342 status = ath11k_htc_process_trailer(htc, trailer, 343 trailer_len, eid); 344 if (status) 345 goto out; 346 347 skb_trim(skb, skb->len - trailer_len); 348 } 349 350 if (trailer_len >= payload_len) 351 /* zero length packet with trailer data, just drop these */ 352 goto out; 353 354 if (eid == ATH11K_HTC_EP_0) { 355 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 356 357 switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { 358 case ATH11K_HTC_MSG_READY_ID: 359 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 360 /* handle HTC control message */ 361 if (completion_done(&htc->ctl_resp)) { 362 /* this is a fatal error, target should not be 363 * sending unsolicited messages on the ep 0 364 */ 365 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 366 complete(&htc->ctl_resp); 367 goto out; 368 } 369 370 htc->control_resp_len = 371 min_t(int, skb->len, 372 ATH11K_HTC_MAX_CTRL_MSG_LEN); 373 374 memcpy(htc->control_resp_buffer, skb->data, 375 htc->control_resp_len); 376 377 complete(&htc->ctl_resp); 378 break; 379 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 380 ath11k_htc_suspend_complete(ab, true); 381 break; 382 case ATH11K_HTC_MSG_NACK_SUSPEND: 383 ath11k_htc_suspend_complete(ab, false); 384 break; 385 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 386 ath11k_htc_wakeup_from_suspend(ab); 387 break; 388 default: 389 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 390 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 391 break; 392 } 393 goto out; 394 } 395 396 ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 397 eid, skb); 398 ep->ep_ops.ep_rx_complete(ab, skb); 399 400 /* poll tx completion for interrupt disabled CE's */ 401 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 402 403 /* skb is now owned by the rx completion handler */ 404 skb = NULL; 405 out: 406 kfree_skb(skb); 407 } 408 409 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 410 struct sk_buff *skb) 411 { 412 /* This is unexpected. FW is not supposed to send regular rx on this 413 * endpoint. 414 */ 415 ath11k_warn(ab, "unexpected htc rx\n"); 416 kfree_skb(skb); 417 } 418 419 static const char *htc_service_name(enum ath11k_htc_svc_id id) 420 { 421 switch (id) { 422 case ATH11K_HTC_SVC_ID_RESERVED: 423 return "Reserved"; 424 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 425 return "Control"; 426 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 427 return "WMI"; 428 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 429 return "DATA BE"; 430 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 431 return "DATA BK"; 432 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 433 return "DATA VI"; 434 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 435 return "DATA VO"; 436 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 437 return "WMI MAC1"; 438 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 439 return "WMI MAC2"; 440 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 441 return "NMI Control"; 442 case ATH11K_HTC_SVC_ID_NMI_DATA: 443 return "NMI Data"; 444 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 445 return "HTT Data"; 446 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 447 return "RAW"; 448 case ATH11K_HTC_SVC_ID_IPA_TX: 449 return "IPA TX"; 450 case ATH11K_HTC_SVC_ID_PKT_LOG: 451 return "PKT LOG"; 452 } 453 454 return "Unknown"; 455 } 456 457 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 458 { 459 struct ath11k_htc_ep *ep; 460 int i; 461 462 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 463 ep = &htc->endpoint[i]; 464 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 465 ep->max_ep_message_len = 0; 466 ep->max_tx_queue_depth = 0; 467 ep->eid = i; 468 ep->htc = htc; 469 ep->tx_credit_flow_enabled = true; 470 } 471 } 472 473 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 474 u16 service_id) 475 { 476 u8 i, allocation = 0; 477 478 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 479 if (htc->service_alloc_table[i].service_id == service_id) { 480 allocation = 481 htc->service_alloc_table[i].credit_allocation; 482 } 483 } 484 485 return allocation; 486 } 487 488 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 489 { 490 struct ath11k_htc_svc_tx_credits *serv_entry; 491 u32 svc_id[] = { 492 ATH11K_HTC_SVC_ID_WMI_CONTROL, 493 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 494 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 495 }; 496 int i, credits; 497 498 credits = htc->total_transmit_credits; 499 serv_entry = htc->service_alloc_table; 500 501 if ((htc->wmi_ep_count == 0) || 502 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 503 return -EINVAL; 504 505 /* Divide credits among number of endpoints for WMI */ 506 credits = credits / htc->wmi_ep_count; 507 for (i = 0; i < htc->wmi_ep_count; i++) { 508 serv_entry[i].service_id = svc_id[i]; 509 serv_entry[i].credit_allocation = credits; 510 } 511 512 return 0; 513 } 514 515 int ath11k_htc_wait_target(struct ath11k_htc *htc) 516 { 517 int i, status = 0; 518 struct ath11k_base *ab = htc->ab; 519 unsigned long time_left; 520 struct ath11k_htc_ready *ready; 521 u16 message_id; 522 u16 credit_count; 523 u16 credit_size; 524 525 time_left = wait_for_completion_timeout(&htc->ctl_resp, 526 ATH11K_HTC_WAIT_TIMEOUT_HZ); 527 if (!time_left) { 528 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 529 530 for (i = 0; i < ab->hw_params.ce_count; i++) 531 ath11k_ce_per_engine_service(htc->ab, i); 532 533 time_left = 534 wait_for_completion_timeout(&htc->ctl_resp, 535 ATH11K_HTC_WAIT_TIMEOUT_HZ); 536 537 if (!time_left) 538 status = -ETIMEDOUT; 539 } 540 541 if (status < 0) { 542 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 543 return status; 544 } 545 546 if (htc->control_resp_len < sizeof(*ready)) { 547 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 548 htc->control_resp_len); 549 return -ECOMM; 550 } 551 552 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 553 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 554 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 555 ready->id_credit_count); 556 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 557 558 if (message_id != ATH11K_HTC_MSG_READY_ID) { 559 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 560 return -ECOMM; 561 } 562 563 htc->total_transmit_credits = credit_count; 564 htc->target_credit_size = credit_size; 565 566 ath11k_dbg(ab, ATH11K_DBG_HTC, 567 "Target ready! transmit resources: %d size:%d\n", 568 htc->total_transmit_credits, htc->target_credit_size); 569 570 if ((htc->total_transmit_credits == 0) || 571 (htc->target_credit_size == 0)) { 572 ath11k_warn(ab, "Invalid credit size received\n"); 573 return -ECOMM; 574 } 575 576 /* For QCA6390, wmi endpoint uses 1 credit to avoid 577 * back-to-back write. 578 */ 579 if (ab->hw_params.supports_shadow_regs) 580 htc->total_transmit_credits = 1; 581 582 ath11k_htc_setup_target_buffer_assignments(htc); 583 584 return 0; 585 } 586 587 int ath11k_htc_connect_service(struct ath11k_htc *htc, 588 struct ath11k_htc_svc_conn_req *conn_req, 589 struct ath11k_htc_svc_conn_resp *conn_resp) 590 { 591 struct ath11k_base *ab = htc->ab; 592 struct ath11k_htc_conn_svc *req_msg; 593 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 594 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 595 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 596 struct ath11k_htc_ep *ep; 597 struct sk_buff *skb; 598 unsigned int max_msg_size = 0; 599 int length, status; 600 unsigned long time_left; 601 bool disable_credit_flow_ctrl = false; 602 u16 message_id, service_id, flags = 0; 603 u8 tx_alloc = 0; 604 605 /* special case for HTC pseudo control service */ 606 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 607 disable_credit_flow_ctrl = true; 608 assigned_eid = ATH11K_HTC_EP_0; 609 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 610 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 611 goto setup; 612 } 613 614 tx_alloc = ath11k_htc_get_credit_allocation(htc, 615 conn_req->service_id); 616 if (!tx_alloc) 617 ath11k_dbg(ab, ATH11K_DBG_BOOT, 618 "boot htc service %s does not allocate target credits\n", 619 htc_service_name(conn_req->service_id)); 620 621 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 622 if (!skb) { 623 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 624 return -ENOMEM; 625 } 626 627 length = sizeof(*req_msg); 628 skb_put(skb, length); 629 memset(skb->data, 0, length); 630 631 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 632 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 633 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 634 635 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 636 637 /* Only enable credit flow control for WMI ctrl service */ 638 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 639 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 640 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 641 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 642 disable_credit_flow_ctrl = true; 643 } 644 645 if (!ab->hw_params.credit_flow) { 646 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 647 disable_credit_flow_ctrl = true; 648 } 649 650 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 651 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 652 conn_req->service_id); 653 654 reinit_completion(&htc->ctl_resp); 655 656 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 657 if (status) { 658 kfree_skb(skb); 659 return status; 660 } 661 662 /* wait for response */ 663 time_left = wait_for_completion_timeout(&htc->ctl_resp, 664 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 665 if (!time_left) { 666 ath11k_err(ab, "Service connect timeout\n"); 667 return -ETIMEDOUT; 668 } 669 670 /* we controlled the buffer creation, it's aligned */ 671 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 672 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 673 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 674 resp_msg->msg_svc_id); 675 676 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 677 (htc->control_resp_len < sizeof(*resp_msg))) { 678 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 679 return -EPROTO; 680 } 681 682 ath11k_dbg(ab, ATH11K_DBG_HTC, 683 "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", 684 htc_service_name(service_id), 685 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 686 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 687 688 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 689 resp_msg->flags_len); 690 691 /* check response status */ 692 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 693 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 694 htc_service_name(service_id), 695 conn_resp->connect_resp_code); 696 return -EPROTO; 697 } 698 699 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 700 HTC_SVC_RESP_MSG_ENDPOINTID, 701 resp_msg->flags_len); 702 703 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 704 resp_msg->flags_len); 705 706 setup: 707 708 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 709 return -EPROTO; 710 711 if (max_msg_size == 0) 712 return -EPROTO; 713 714 ep = &htc->endpoint[assigned_eid]; 715 ep->eid = assigned_eid; 716 717 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 718 return -EPROTO; 719 720 /* return assigned endpoint to caller */ 721 conn_resp->eid = assigned_eid; 722 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 723 resp_msg->flags_len); 724 725 /* setup the endpoint */ 726 ep->service_id = conn_req->service_id; 727 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 728 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 729 resp_msg->flags_len); 730 ep->tx_credits = tx_alloc; 731 732 /* copy all the callbacks */ 733 ep->ep_ops = conn_req->ep_ops; 734 735 status = ath11k_hif_map_service_to_pipe(htc->ab, 736 ep->service_id, 737 &ep->ul_pipe_id, 738 &ep->dl_pipe_id); 739 if (status) 740 return status; 741 742 ath11k_dbg(ab, ATH11K_DBG_BOOT, 743 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 744 htc_service_name(ep->service_id), ep->ul_pipe_id, 745 ep->dl_pipe_id, ep->eid); 746 747 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 748 ep->tx_credit_flow_enabled = false; 749 ath11k_dbg(ab, ATH11K_DBG_BOOT, 750 "boot htc service '%s' eid %d TX flow control disabled\n", 751 htc_service_name(ep->service_id), assigned_eid); 752 } 753 754 return status; 755 } 756 757 int ath11k_htc_start(struct ath11k_htc *htc) 758 { 759 struct sk_buff *skb; 760 int status = 0; 761 struct ath11k_base *ab = htc->ab; 762 struct ath11k_htc_setup_complete_extended *msg; 763 764 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 765 if (!skb) 766 return -ENOMEM; 767 768 skb_put(skb, sizeof(*msg)); 769 memset(skb->data, 0, skb->len); 770 771 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 772 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 773 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 774 775 if (ab->hw_params.credit_flow) 776 ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); 777 else 778 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW; 779 780 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 781 if (status) { 782 kfree_skb(skb); 783 return status; 784 } 785 786 return 0; 787 } 788 789 int ath11k_htc_init(struct ath11k_base *ab) 790 { 791 struct ath11k_htc *htc = &ab->htc; 792 struct ath11k_htc_svc_conn_req conn_req; 793 struct ath11k_htc_svc_conn_resp conn_resp; 794 int ret; 795 796 spin_lock_init(&htc->tx_lock); 797 798 ath11k_htc_reset_endpoint_states(htc); 799 800 htc->ab = ab; 801 802 switch (ab->wmi_ab.preferred_hw_mode) { 803 case WMI_HOST_HW_MODE_SINGLE: 804 htc->wmi_ep_count = 1; 805 break; 806 case WMI_HOST_HW_MODE_DBS: 807 case WMI_HOST_HW_MODE_DBS_OR_SBS: 808 htc->wmi_ep_count = 2; 809 break; 810 case WMI_HOST_HW_MODE_DBS_SBS: 811 htc->wmi_ep_count = 3; 812 break; 813 default: 814 htc->wmi_ep_count = ab->hw_params.max_radios; 815 break; 816 } 817 818 /* setup our pseudo HTC control endpoint connection */ 819 memset(&conn_req, 0, sizeof(conn_req)); 820 memset(&conn_resp, 0, sizeof(conn_resp)); 821 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 822 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 823 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 824 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 825 826 /* connect fake service */ 827 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 828 if (ret) { 829 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 830 return ret; 831 } 832 833 init_completion(&htc->ctl_resp); 834 835 return 0; 836 } 837