1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. 4 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. 5 */ 6 #include <linux/skbuff.h> 7 #include <linux/ctype.h> 8 9 #include "debug.h" 10 #include "hif.h" 11 12 struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ab, int size) 13 { 14 struct sk_buff *skb; 15 16 skb = dev_alloc_skb(size + sizeof(struct ath11k_htc_hdr)); 17 if (!skb) 18 return NULL; 19 20 skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); 21 22 /* FW/HTC requires 4-byte aligned streams */ 23 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 24 ath11k_warn(ab, "Unaligned HTC tx skb\n"); 25 26 return skb; 27 } 28 29 static void ath11k_htc_control_tx_complete(struct ath11k_base *ab, 30 struct sk_buff *skb) 31 { 32 kfree_skb(skb); 33 } 34 35 static struct sk_buff *ath11k_htc_build_tx_ctrl_skb(void *ab) 36 { 37 struct sk_buff *skb; 38 struct ath11k_skb_cb *skb_cb; 39 40 skb = dev_alloc_skb(ATH11K_HTC_CONTROL_BUFFER_SIZE); 41 if (!skb) 42 return NULL; 43 44 skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); 45 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4)); 46 47 skb_cb = ATH11K_SKB_CB(skb); 48 memset(skb_cb, 0, sizeof(*skb_cb)); 49 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 "ep %d insufficient credits required %d total %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 "ep %d credits consumed %d 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 ath11k_dbg(ab, ATH11K_DBG_HTC, "tx skb %p eid %d paddr %pad\n", 123 skb, skb_cb->eid, &skb_cb->paddr); 124 125 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 126 if (ret) 127 goto err_unmap; 128 129 return 0; 130 131 err_unmap: 132 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 133 err_credits: 134 if (credit_flow_enabled) { 135 spin_lock_bh(&htc->tx_lock); 136 ep->tx_credits += credits; 137 ath11k_dbg(ab, ATH11K_DBG_HTC, 138 "ep %d credits reverted %d total %d\n", 139 eid, credits, ep->tx_credits); 140 spin_unlock_bh(&htc->tx_lock); 141 142 if (ep->ep_ops.ep_tx_credits) 143 ep->ep_ops.ep_tx_credits(htc->ab); 144 } 145 err_pull: 146 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 147 return ret; 148 } 149 150 static void 151 ath11k_htc_process_credit_report(struct ath11k_htc *htc, 152 const struct ath11k_htc_credit_report *report, 153 int len, 154 enum ath11k_htc_ep_id eid) 155 { 156 struct ath11k_base *ab = htc->ab; 157 struct ath11k_htc_ep *ep; 158 int i, n_reports; 159 160 if (len % sizeof(*report)) 161 ath11k_warn(ab, "Uneven credit report len %d", len); 162 163 n_reports = len / sizeof(*report); 164 165 spin_lock_bh(&htc->tx_lock); 166 for (i = 0; i < n_reports; i++, report++) { 167 if (report->eid >= ATH11K_HTC_EP_COUNT) 168 break; 169 170 ep = &htc->endpoint[report->eid]; 171 ep->tx_credits += report->credits; 172 173 ath11k_dbg(ab, ATH11K_DBG_HTC, "ep %d credits got %d total %d\n", 174 report->eid, report->credits, ep->tx_credits); 175 176 if (ep->ep_ops.ep_tx_credits) { 177 spin_unlock_bh(&htc->tx_lock); 178 ep->ep_ops.ep_tx_credits(htc->ab); 179 spin_lock_bh(&htc->tx_lock); 180 } 181 } 182 spin_unlock_bh(&htc->tx_lock); 183 } 184 185 static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 186 u8 *buffer, 187 int length, 188 enum ath11k_htc_ep_id src_eid) 189 { 190 struct ath11k_base *ab = htc->ab; 191 int status = 0; 192 struct ath11k_htc_record *record; 193 size_t len; 194 195 while (length > 0) { 196 record = (struct ath11k_htc_record *)buffer; 197 198 if (length < sizeof(record->hdr)) { 199 status = -EINVAL; 200 break; 201 } 202 203 if (record->hdr.len > length) { 204 /* no room left in buffer for record */ 205 ath11k_warn(ab, "Invalid record length: %d\n", 206 record->hdr.len); 207 status = -EINVAL; 208 break; 209 } 210 211 if (ab->hw_params.credit_flow) { 212 switch (record->hdr.id) { 213 case ATH11K_HTC_RECORD_CREDITS: 214 len = sizeof(struct ath11k_htc_credit_report); 215 if (record->hdr.len < len) { 216 ath11k_warn(ab, "Credit report too long\n"); 217 status = -EINVAL; 218 break; 219 } 220 ath11k_htc_process_credit_report(htc, 221 record->credit_report, 222 record->hdr.len, 223 src_eid); 224 break; 225 default: 226 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 227 record->hdr.id, record->hdr.len); 228 break; 229 } 230 } 231 232 if (status) 233 break; 234 235 /* multiple records may be present in a trailer */ 236 buffer += sizeof(record->hdr) + record->hdr.len; 237 length -= sizeof(record->hdr) + record->hdr.len; 238 } 239 240 return status; 241 } 242 243 static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack) 244 { 245 ath11k_dbg(ab, ATH11K_DBG_BOOT, "suspend complete %d\n", ack); 246 247 if (ack) 248 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 249 else 250 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 251 252 complete(&ab->htc_suspend); 253 } 254 255 void ath11k_htc_tx_completion_handler(struct ath11k_base *ab, 256 struct sk_buff *skb) 257 { 258 struct ath11k_htc *htc = &ab->htc; 259 struct ath11k_htc_ep *ep; 260 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *); 261 u8 eid; 262 263 eid = ATH11K_SKB_CB(skb)->eid; 264 if (eid >= ATH11K_HTC_EP_COUNT) { 265 dev_kfree_skb_any(skb); 266 return; 267 } 268 269 ep = &htc->endpoint[eid]; 270 spin_lock_bh(&htc->tx_lock); 271 ep_tx_complete = ep->ep_ops.ep_tx_complete; 272 spin_unlock_bh(&htc->tx_lock); 273 if (!ep_tx_complete) { 274 dev_kfree_skb_any(skb); 275 return; 276 } 277 ep_tx_complete(htc->ab, skb); 278 } 279 280 static void ath11k_htc_wakeup_from_suspend(struct ath11k_base *ab) 281 { 282 ath11k_dbg(ab, ATH11K_DBG_BOOT, "wakeup from suspend is received\n"); 283 } 284 285 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 286 struct sk_buff *skb) 287 { 288 int status = 0; 289 struct ath11k_htc *htc = &ab->htc; 290 struct ath11k_htc_hdr *hdr; 291 struct ath11k_htc_ep *ep; 292 u16 payload_len; 293 u32 message_id, trailer_len = 0; 294 size_t min_len; 295 u8 eid; 296 bool trailer_present; 297 298 hdr = (struct ath11k_htc_hdr *)skb->data; 299 skb_pull(skb, sizeof(*hdr)); 300 301 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 302 303 if (eid >= ATH11K_HTC_EP_COUNT) { 304 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 305 goto out; 306 } 307 308 ep = &htc->endpoint[eid]; 309 310 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 311 312 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 313 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 314 payload_len + sizeof(*hdr)); 315 goto out; 316 } 317 318 if (skb->len < payload_len) { 319 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 320 skb->len, payload_len); 321 goto out; 322 } 323 324 /* get flags to check for trailer */ 325 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 326 ATH11K_HTC_FLAG_TRAILER_PRESENT; 327 328 ath11k_dbg(ab, ATH11K_DBG_HTC, "rx ep %d skb %p trailer_present %d\n", 329 eid, skb, trailer_present); 330 331 if (trailer_present) { 332 u8 *trailer; 333 334 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 335 min_len = sizeof(struct ath11k_htc_record_hdr); 336 337 if ((trailer_len < min_len) || 338 (trailer_len > payload_len)) { 339 ath11k_warn(ab, "Invalid trailer length: %d\n", 340 trailer_len); 341 goto out; 342 } 343 344 trailer = (u8 *)hdr; 345 trailer += sizeof(*hdr); 346 trailer += payload_len; 347 trailer -= trailer_len; 348 status = ath11k_htc_process_trailer(htc, trailer, 349 trailer_len, eid); 350 if (status) 351 goto out; 352 353 skb_trim(skb, skb->len - trailer_len); 354 } 355 356 if (trailer_len >= payload_len) 357 /* zero length packet with trailer data, just drop these */ 358 goto out; 359 360 if (eid == ATH11K_HTC_EP_0) { 361 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 362 363 message_id = FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id); 364 365 ath11k_dbg(ab, ATH11K_DBG_HTC, "rx ep %d skb %p message_id %d\n", 366 eid, skb, message_id); 367 368 switch (message_id) { 369 case ATH11K_HTC_MSG_READY_ID: 370 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 371 /* handle HTC control message */ 372 if (completion_done(&htc->ctl_resp)) { 373 /* this is a fatal error, target should not be 374 * sending unsolicited messages on the ep 0 375 */ 376 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 377 complete(&htc->ctl_resp); 378 goto out; 379 } 380 381 htc->control_resp_len = 382 min_t(int, skb->len, 383 ATH11K_HTC_MAX_CTRL_MSG_LEN); 384 385 memcpy(htc->control_resp_buffer, skb->data, 386 htc->control_resp_len); 387 388 complete(&htc->ctl_resp); 389 break; 390 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 391 ath11k_htc_suspend_complete(ab, true); 392 break; 393 case ATH11K_HTC_MSG_NACK_SUSPEND: 394 ath11k_htc_suspend_complete(ab, false); 395 break; 396 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 397 ath11k_htc_wakeup_from_suspend(ab); 398 break; 399 default: 400 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 401 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 402 break; 403 } 404 goto out; 405 } 406 407 ep->ep_ops.ep_rx_complete(ab, skb); 408 409 /* poll tx completion for interrupt disabled CE's */ 410 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 411 412 /* skb is now owned by the rx completion handler */ 413 skb = NULL; 414 out: 415 kfree_skb(skb); 416 } 417 418 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 419 struct sk_buff *skb) 420 { 421 /* This is unexpected. FW is not supposed to send regular rx on this 422 * endpoint. 423 */ 424 ath11k_warn(ab, "unexpected htc rx\n"); 425 kfree_skb(skb); 426 } 427 428 static const char *htc_service_name(enum ath11k_htc_svc_id id) 429 { 430 switch (id) { 431 case ATH11K_HTC_SVC_ID_RESERVED: 432 return "Reserved"; 433 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 434 return "Control"; 435 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 436 return "WMI"; 437 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 438 return "DATA BE"; 439 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 440 return "DATA BK"; 441 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 442 return "DATA VI"; 443 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 444 return "DATA VO"; 445 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 446 return "WMI MAC1"; 447 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 448 return "WMI MAC2"; 449 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 450 return "NMI Control"; 451 case ATH11K_HTC_SVC_ID_NMI_DATA: 452 return "NMI Data"; 453 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 454 return "HTT Data"; 455 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 456 return "RAW"; 457 case ATH11K_HTC_SVC_ID_IPA_TX: 458 return "IPA TX"; 459 case ATH11K_HTC_SVC_ID_PKT_LOG: 460 return "PKT LOG"; 461 } 462 463 return "Unknown"; 464 } 465 466 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 467 { 468 struct ath11k_htc_ep *ep; 469 int i; 470 471 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 472 ep = &htc->endpoint[i]; 473 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 474 ep->max_ep_message_len = 0; 475 ep->max_tx_queue_depth = 0; 476 ep->eid = i; 477 ep->htc = htc; 478 ep->tx_credit_flow_enabled = true; 479 } 480 } 481 482 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 483 u16 service_id) 484 { 485 u8 i, allocation = 0; 486 487 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 488 if (htc->service_alloc_table[i].service_id == service_id) { 489 allocation = 490 htc->service_alloc_table[i].credit_allocation; 491 } 492 } 493 494 return allocation; 495 } 496 497 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 498 { 499 struct ath11k_htc_svc_tx_credits *serv_entry; 500 u32 svc_id[] = { 501 ATH11K_HTC_SVC_ID_WMI_CONTROL, 502 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 503 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 504 }; 505 int i, credits; 506 507 credits = htc->total_transmit_credits; 508 serv_entry = htc->service_alloc_table; 509 510 if ((htc->wmi_ep_count == 0) || 511 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 512 return -EINVAL; 513 514 /* Divide credits among number of endpoints for WMI */ 515 credits = credits / htc->wmi_ep_count; 516 for (i = 0; i < htc->wmi_ep_count; i++) { 517 serv_entry[i].service_id = svc_id[i]; 518 serv_entry[i].credit_allocation = credits; 519 } 520 521 return 0; 522 } 523 524 int ath11k_htc_wait_target(struct ath11k_htc *htc) 525 { 526 int i, status = 0; 527 struct ath11k_base *ab = htc->ab; 528 unsigned long time_left; 529 struct ath11k_htc_ready *ready; 530 u16 message_id; 531 u16 credit_count; 532 u16 credit_size; 533 534 time_left = wait_for_completion_timeout(&htc->ctl_resp, 535 ATH11K_HTC_WAIT_TIMEOUT_HZ); 536 if (!time_left) { 537 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 538 539 for (i = 0; i < ab->hw_params.ce_count; i++) 540 ath11k_ce_per_engine_service(htc->ab, i); 541 542 time_left = 543 wait_for_completion_timeout(&htc->ctl_resp, 544 ATH11K_HTC_WAIT_TIMEOUT_HZ); 545 546 if (!time_left) 547 status = -ETIMEDOUT; 548 } 549 550 if (status < 0) { 551 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 552 return status; 553 } 554 555 if (htc->control_resp_len < sizeof(*ready)) { 556 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 557 htc->control_resp_len); 558 return -ECOMM; 559 } 560 561 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 562 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 563 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 564 ready->id_credit_count); 565 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 566 567 if (message_id != ATH11K_HTC_MSG_READY_ID) { 568 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 569 return -ECOMM; 570 } 571 572 htc->total_transmit_credits = credit_count; 573 htc->target_credit_size = credit_size; 574 575 ath11k_dbg(ab, ATH11K_DBG_HTC, 576 "target ready total_transmit_credits %d target_credit_size %d\n", 577 htc->total_transmit_credits, htc->target_credit_size); 578 579 if ((htc->total_transmit_credits == 0) || 580 (htc->target_credit_size == 0)) { 581 ath11k_warn(ab, "Invalid credit size received\n"); 582 return -ECOMM; 583 } 584 585 /* For QCA6390, wmi endpoint uses 1 credit to avoid 586 * back-to-back write. 587 */ 588 if (ab->hw_params.supports_shadow_regs) 589 htc->total_transmit_credits = 1; 590 591 ath11k_htc_setup_target_buffer_assignments(htc); 592 593 return 0; 594 } 595 596 int ath11k_htc_connect_service(struct ath11k_htc *htc, 597 struct ath11k_htc_svc_conn_req *conn_req, 598 struct ath11k_htc_svc_conn_resp *conn_resp) 599 { 600 struct ath11k_base *ab = htc->ab; 601 struct ath11k_htc_conn_svc *req_msg; 602 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 603 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 604 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 605 struct ath11k_htc_ep *ep; 606 struct sk_buff *skb; 607 unsigned int max_msg_size = 0; 608 int length, status; 609 unsigned long time_left; 610 bool disable_credit_flow_ctrl = false; 611 u16 message_id, service_id, flags = 0; 612 u8 tx_alloc = 0; 613 614 /* special case for HTC pseudo control service */ 615 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 616 disable_credit_flow_ctrl = true; 617 assigned_eid = ATH11K_HTC_EP_0; 618 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 619 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 620 goto setup; 621 } 622 623 tx_alloc = ath11k_htc_get_credit_allocation(htc, 624 conn_req->service_id); 625 if (!tx_alloc) 626 ath11k_dbg(ab, ATH11K_DBG_BOOT, 627 "htc service %s does not allocate target credits\n", 628 htc_service_name(conn_req->service_id)); 629 630 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 631 if (!skb) { 632 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 633 return -ENOMEM; 634 } 635 636 length = sizeof(*req_msg); 637 skb_put(skb, length); 638 memset(skb->data, 0, length); 639 640 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 641 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 642 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 643 644 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 645 646 /* Only enable credit flow control for WMI ctrl service */ 647 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 648 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 649 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 650 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 651 disable_credit_flow_ctrl = true; 652 } 653 654 if (!ab->hw_params.credit_flow) { 655 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 656 disable_credit_flow_ctrl = true; 657 } 658 659 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 660 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 661 conn_req->service_id); 662 663 reinit_completion(&htc->ctl_resp); 664 665 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 666 if (status) { 667 kfree_skb(skb); 668 return status; 669 } 670 671 /* wait for response */ 672 time_left = wait_for_completion_timeout(&htc->ctl_resp, 673 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 674 if (!time_left) { 675 ath11k_err(ab, "Service connect timeout\n"); 676 return -ETIMEDOUT; 677 } 678 679 /* we controlled the buffer creation, it's aligned */ 680 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 681 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 682 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 683 resp_msg->msg_svc_id); 684 685 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 686 (htc->control_resp_len < sizeof(*resp_msg))) { 687 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 688 return -EPROTO; 689 } 690 691 ath11k_dbg(ab, ATH11K_DBG_HTC, 692 "service %s connect response status 0x%lx assigned ep 0x%lx\n", 693 htc_service_name(service_id), 694 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 695 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 696 697 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 698 resp_msg->flags_len); 699 700 /* check response status */ 701 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 702 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 703 htc_service_name(service_id), 704 conn_resp->connect_resp_code); 705 return -EPROTO; 706 } 707 708 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 709 HTC_SVC_RESP_MSG_ENDPOINTID, 710 resp_msg->flags_len); 711 712 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 713 resp_msg->flags_len); 714 715 setup: 716 717 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 718 return -EPROTO; 719 720 if (max_msg_size == 0) 721 return -EPROTO; 722 723 ep = &htc->endpoint[assigned_eid]; 724 ep->eid = assigned_eid; 725 726 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 727 return -EPROTO; 728 729 /* return assigned endpoint to caller */ 730 conn_resp->eid = assigned_eid; 731 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 732 resp_msg->flags_len); 733 734 /* setup the endpoint */ 735 ep->service_id = conn_req->service_id; 736 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 737 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 738 resp_msg->flags_len); 739 ep->tx_credits = tx_alloc; 740 741 /* copy all the callbacks */ 742 ep->ep_ops = conn_req->ep_ops; 743 744 status = ath11k_hif_map_service_to_pipe(htc->ab, 745 ep->service_id, 746 &ep->ul_pipe_id, 747 &ep->dl_pipe_id); 748 if (status) 749 return status; 750 751 ath11k_dbg(ab, ATH11K_DBG_BOOT, 752 "htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 753 htc_service_name(ep->service_id), ep->ul_pipe_id, 754 ep->dl_pipe_id, ep->eid); 755 756 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 757 ep->tx_credit_flow_enabled = false; 758 ath11k_dbg(ab, ATH11K_DBG_BOOT, 759 "htc service '%s' eid %d tx flow control disabled\n", 760 htc_service_name(ep->service_id), assigned_eid); 761 } 762 763 return status; 764 } 765 766 int ath11k_htc_start(struct ath11k_htc *htc) 767 { 768 struct sk_buff *skb; 769 int status = 0; 770 struct ath11k_base *ab = htc->ab; 771 struct ath11k_htc_setup_complete_extended *msg; 772 773 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 774 if (!skb) 775 return -ENOMEM; 776 777 skb_put(skb, sizeof(*msg)); 778 memset(skb->data, 0, skb->len); 779 780 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 781 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 782 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 783 784 if (ab->hw_params.credit_flow) 785 ath11k_dbg(ab, ATH11K_DBG_HTC, "using tx credit flow control\n"); 786 else 787 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW; 788 789 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 790 if (status) { 791 kfree_skb(skb); 792 return status; 793 } 794 795 return 0; 796 } 797 798 int ath11k_htc_init(struct ath11k_base *ab) 799 { 800 struct ath11k_htc *htc = &ab->htc; 801 struct ath11k_htc_svc_conn_req conn_req; 802 struct ath11k_htc_svc_conn_resp conn_resp; 803 int ret; 804 805 spin_lock_init(&htc->tx_lock); 806 807 ath11k_htc_reset_endpoint_states(htc); 808 809 htc->ab = ab; 810 811 switch (ab->wmi_ab.preferred_hw_mode) { 812 case WMI_HOST_HW_MODE_SINGLE: 813 htc->wmi_ep_count = 1; 814 break; 815 case WMI_HOST_HW_MODE_DBS: 816 case WMI_HOST_HW_MODE_DBS_OR_SBS: 817 htc->wmi_ep_count = 2; 818 break; 819 case WMI_HOST_HW_MODE_DBS_SBS: 820 htc->wmi_ep_count = 3; 821 break; 822 default: 823 htc->wmi_ep_count = ab->hw_params.max_radios; 824 break; 825 } 826 827 /* setup our pseudo HTC control endpoint connection */ 828 memset(&conn_req, 0, sizeof(conn_req)); 829 memset(&conn_resp, 0, sizeof(conn_resp)); 830 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 831 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 832 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 833 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 834 835 /* connect fake service */ 836 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 837 if (ret) { 838 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 839 return ret; 840 } 841 842 init_completion(&htc->ctl_resp); 843 844 return 0; 845 } 846