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 return skb; 50 } 51 52 static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep, 53 struct sk_buff *skb) 54 { 55 struct ath11k_htc_hdr *hdr; 56 57 hdr = (struct ath11k_htc_hdr *)skb->data; 58 59 memset(hdr, 0, sizeof(*hdr)); 60 hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) | 61 FIELD_PREP(HTC_HDR_PAYLOADLEN, 62 (skb->len - sizeof(*hdr))); 63 64 if (ep->tx_credit_flow_enabled) 65 hdr->htc_info |= FIELD_PREP(HTC_HDR_FLAGS, 66 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE); 67 68 spin_lock_bh(&ep->htc->tx_lock); 69 hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++); 70 spin_unlock_bh(&ep->htc->tx_lock); 71 } 72 73 int ath11k_htc_send(struct ath11k_htc *htc, 74 enum ath11k_htc_ep_id eid, 75 struct sk_buff *skb) 76 { 77 struct ath11k_htc_ep *ep = &htc->endpoint[eid]; 78 struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); 79 struct device *dev = htc->ab->dev; 80 struct ath11k_base *ab = htc->ab; 81 int credits = 0; 82 int ret; 83 bool credit_flow_enabled = (ab->hw_params.credit_flow && 84 ep->tx_credit_flow_enabled); 85 86 if (eid >= ATH11K_HTC_EP_COUNT) { 87 ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); 88 return -ENOENT; 89 } 90 91 skb_push(skb, sizeof(struct ath11k_htc_hdr)); 92 93 if (credit_flow_enabled) { 94 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 95 spin_lock_bh(&htc->tx_lock); 96 if (ep->tx_credits < credits) { 97 ath11k_dbg(ab, ATH11K_DBG_HTC, 98 "ep %d insufficient credits required %d total %d\n", 99 eid, credits, ep->tx_credits); 100 spin_unlock_bh(&htc->tx_lock); 101 ret = -EAGAIN; 102 goto err_pull; 103 } 104 ep->tx_credits -= credits; 105 ath11k_dbg(ab, ATH11K_DBG_HTC, 106 "ep %d credits consumed %d total %d\n", 107 eid, credits, ep->tx_credits); 108 spin_unlock_bh(&htc->tx_lock); 109 } 110 111 ath11k_htc_prepare_tx_skb(ep, skb); 112 113 skb_cb->eid = eid; 114 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 115 ret = dma_mapping_error(dev, skb_cb->paddr); 116 if (ret) { 117 ret = -EIO; 118 goto err_credits; 119 } 120 121 ath11k_dbg(ab, ATH11K_DBG_HTC, "tx skb %p eid %d paddr %pad\n", 122 skb, skb_cb->eid, &skb_cb->paddr); 123 124 ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 125 if (ret) 126 goto err_unmap; 127 128 return 0; 129 130 err_unmap: 131 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 132 err_credits: 133 if (credit_flow_enabled) { 134 spin_lock_bh(&htc->tx_lock); 135 ep->tx_credits += credits; 136 ath11k_dbg(ab, ATH11K_DBG_HTC, 137 "ep %d credits reverted %d total %d\n", 138 eid, credits, ep->tx_credits); 139 spin_unlock_bh(&htc->tx_lock); 140 141 if (ep->ep_ops.ep_tx_credits) 142 ep->ep_ops.ep_tx_credits(htc->ab); 143 } 144 err_pull: 145 skb_pull(skb, sizeof(struct ath11k_htc_hdr)); 146 return ret; 147 } 148 149 static void 150 ath11k_htc_process_credit_report(struct ath11k_htc *htc, 151 const struct ath11k_htc_credit_report *report, 152 int len, 153 enum ath11k_htc_ep_id eid) 154 { 155 struct ath11k_base *ab = htc->ab; 156 struct ath11k_htc_ep *ep; 157 int i, n_reports; 158 159 if (len % sizeof(*report)) 160 ath11k_warn(ab, "Uneven credit report len %d", len); 161 162 n_reports = len / sizeof(*report); 163 164 spin_lock_bh(&htc->tx_lock); 165 for (i = 0; i < n_reports; i++, report++) { 166 if (report->eid >= ATH11K_HTC_EP_COUNT) 167 break; 168 169 ep = &htc->endpoint[report->eid]; 170 ep->tx_credits += report->credits; 171 172 ath11k_dbg(ab, ATH11K_DBG_HTC, "ep %d credits got %d total %d\n", 173 report->eid, report->credits, ep->tx_credits); 174 175 if (ep->ep_ops.ep_tx_credits) { 176 spin_unlock_bh(&htc->tx_lock); 177 ep->ep_ops.ep_tx_credits(htc->ab); 178 spin_lock_bh(&htc->tx_lock); 179 } 180 } 181 spin_unlock_bh(&htc->tx_lock); 182 } 183 184 static int ath11k_htc_process_trailer(struct ath11k_htc *htc, 185 u8 *buffer, 186 int length, 187 enum ath11k_htc_ep_id src_eid) 188 { 189 struct ath11k_base *ab = htc->ab; 190 int status = 0; 191 struct ath11k_htc_record *record; 192 size_t len; 193 194 while (length > 0) { 195 record = (struct ath11k_htc_record *)buffer; 196 197 if (length < sizeof(record->hdr)) { 198 status = -EINVAL; 199 break; 200 } 201 202 if (record->hdr.len > length) { 203 /* no room left in buffer for record */ 204 ath11k_warn(ab, "Invalid record length: %d\n", 205 record->hdr.len); 206 status = -EINVAL; 207 break; 208 } 209 210 if (ab->hw_params.credit_flow) { 211 switch (record->hdr.id) { 212 case ATH11K_HTC_RECORD_CREDITS: 213 len = sizeof(struct ath11k_htc_credit_report); 214 if (record->hdr.len < len) { 215 ath11k_warn(ab, "Credit report too long\n"); 216 status = -EINVAL; 217 break; 218 } 219 ath11k_htc_process_credit_report(htc, 220 record->credit_report, 221 record->hdr.len, 222 src_eid); 223 break; 224 default: 225 ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", 226 record->hdr.id, record->hdr.len); 227 break; 228 } 229 } 230 231 if (status) 232 break; 233 234 /* multiple records may be present in a trailer */ 235 buffer += sizeof(record->hdr) + record->hdr.len; 236 length -= sizeof(record->hdr) + record->hdr.len; 237 } 238 239 return status; 240 } 241 242 static void ath11k_htc_suspend_complete(struct ath11k_base *ab, bool ack) 243 { 244 ath11k_dbg(ab, ATH11K_DBG_BOOT, "suspend complete %d\n", ack); 245 246 if (ack) 247 set_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 248 else 249 clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 250 251 complete(&ab->htc_suspend); 252 } 253 254 void ath11k_htc_tx_completion_handler(struct ath11k_base *ab, 255 struct sk_buff *skb) 256 { 257 struct ath11k_htc *htc = &ab->htc; 258 struct ath11k_htc_ep *ep; 259 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *); 260 u8 eid; 261 262 eid = ATH11K_SKB_CB(skb)->eid; 263 if (eid >= ATH11K_HTC_EP_COUNT) { 264 dev_kfree_skb_any(skb); 265 return; 266 } 267 268 ep = &htc->endpoint[eid]; 269 spin_lock_bh(&htc->tx_lock); 270 ep_tx_complete = ep->ep_ops.ep_tx_complete; 271 spin_unlock_bh(&htc->tx_lock); 272 if (!ep_tx_complete) { 273 dev_kfree_skb_any(skb); 274 return; 275 } 276 ep_tx_complete(htc->ab, skb); 277 } 278 279 static void ath11k_htc_wakeup_from_suspend(struct ath11k_base *ab) 280 { 281 ath11k_dbg(ab, ATH11K_DBG_BOOT, "wakeup from suspend is received\n"); 282 } 283 284 void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, 285 struct sk_buff *skb) 286 { 287 int status = 0; 288 struct ath11k_htc *htc = &ab->htc; 289 struct ath11k_htc_hdr *hdr; 290 struct ath11k_htc_ep *ep; 291 u16 payload_len; 292 u32 message_id, trailer_len = 0; 293 size_t min_len; 294 u8 eid; 295 bool trailer_present; 296 297 hdr = (struct ath11k_htc_hdr *)skb->data; 298 skb_pull(skb, sizeof(*hdr)); 299 300 eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); 301 302 if (eid >= ATH11K_HTC_EP_COUNT) { 303 ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 304 goto out; 305 } 306 307 ep = &htc->endpoint[eid]; 308 309 payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); 310 311 if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { 312 ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", 313 payload_len + sizeof(*hdr)); 314 goto out; 315 } 316 317 if (skb->len < payload_len) { 318 ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 319 skb->len, payload_len); 320 goto out; 321 } 322 323 /* get flags to check for trailer */ 324 trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & 325 ATH11K_HTC_FLAG_TRAILER_PRESENT; 326 327 ath11k_dbg(ab, ATH11K_DBG_HTC, "rx ep %d skb %p trailer_present %d\n", 328 eid, skb, trailer_present); 329 330 if (trailer_present) { 331 u8 *trailer; 332 333 trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); 334 min_len = sizeof(struct ath11k_htc_record_hdr); 335 336 if ((trailer_len < min_len) || 337 (trailer_len > payload_len)) { 338 ath11k_warn(ab, "Invalid trailer length: %d\n", 339 trailer_len); 340 goto out; 341 } 342 343 trailer = (u8 *)hdr; 344 trailer += sizeof(*hdr); 345 trailer += payload_len; 346 trailer -= trailer_len; 347 status = ath11k_htc_process_trailer(htc, trailer, 348 trailer_len, eid); 349 if (status) 350 goto out; 351 352 skb_trim(skb, skb->len - trailer_len); 353 } 354 355 if (trailer_len >= payload_len) 356 /* zero length packet with trailer data, just drop these */ 357 goto out; 358 359 if (eid == ATH11K_HTC_EP_0) { 360 struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; 361 362 message_id = FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id); 363 364 ath11k_dbg(ab, ATH11K_DBG_HTC, "rx ep %d skb %p message_id %d\n", 365 eid, skb, message_id); 366 367 switch (message_id) { 368 case ATH11K_HTC_MSG_READY_ID: 369 case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 370 /* handle HTC control message */ 371 if (completion_done(&htc->ctl_resp)) { 372 /* this is a fatal error, target should not be 373 * sending unsolicited messages on the ep 0 374 */ 375 ath11k_warn(ab, "HTC rx ctrl still processing\n"); 376 complete(&htc->ctl_resp); 377 goto out; 378 } 379 380 htc->control_resp_len = 381 min_t(int, skb->len, 382 ATH11K_HTC_MAX_CTRL_MSG_LEN); 383 384 memcpy(htc->control_resp_buffer, skb->data, 385 htc->control_resp_len); 386 387 complete(&htc->ctl_resp); 388 break; 389 case ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE: 390 ath11k_htc_suspend_complete(ab, true); 391 break; 392 case ATH11K_HTC_MSG_NACK_SUSPEND: 393 ath11k_htc_suspend_complete(ab, false); 394 break; 395 case ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 396 ath11k_htc_wakeup_from_suspend(ab); 397 break; 398 default: 399 ath11k_warn(ab, "ignoring unsolicited htc ep0 event %ld\n", 400 FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)); 401 break; 402 } 403 goto out; 404 } 405 406 ep->ep_ops.ep_rx_complete(ab, skb); 407 408 /* poll tx completion for interrupt disabled CE's */ 409 ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); 410 411 /* skb is now owned by the rx completion handler */ 412 skb = NULL; 413 out: 414 kfree_skb(skb); 415 } 416 417 static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, 418 struct sk_buff *skb) 419 { 420 /* This is unexpected. FW is not supposed to send regular rx on this 421 * endpoint. 422 */ 423 ath11k_warn(ab, "unexpected htc rx\n"); 424 kfree_skb(skb); 425 } 426 427 static const char *htc_service_name(enum ath11k_htc_svc_id id) 428 { 429 switch (id) { 430 case ATH11K_HTC_SVC_ID_RESERVED: 431 return "Reserved"; 432 case ATH11K_HTC_SVC_ID_RSVD_CTRL: 433 return "Control"; 434 case ATH11K_HTC_SVC_ID_WMI_CONTROL: 435 return "WMI"; 436 case ATH11K_HTC_SVC_ID_WMI_DATA_BE: 437 return "DATA BE"; 438 case ATH11K_HTC_SVC_ID_WMI_DATA_BK: 439 return "DATA BK"; 440 case ATH11K_HTC_SVC_ID_WMI_DATA_VI: 441 return "DATA VI"; 442 case ATH11K_HTC_SVC_ID_WMI_DATA_VO: 443 return "DATA VO"; 444 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: 445 return "WMI MAC1"; 446 case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: 447 return "WMI MAC2"; 448 case ATH11K_HTC_SVC_ID_NMI_CONTROL: 449 return "NMI Control"; 450 case ATH11K_HTC_SVC_ID_NMI_DATA: 451 return "NMI Data"; 452 case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: 453 return "HTT Data"; 454 case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: 455 return "RAW"; 456 case ATH11K_HTC_SVC_ID_IPA_TX: 457 return "IPA TX"; 458 case ATH11K_HTC_SVC_ID_PKT_LOG: 459 return "PKT LOG"; 460 } 461 462 return "Unknown"; 463 } 464 465 static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) 466 { 467 struct ath11k_htc_ep *ep; 468 int i; 469 470 for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { 471 ep = &htc->endpoint[i]; 472 ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; 473 ep->max_ep_message_len = 0; 474 ep->max_tx_queue_depth = 0; 475 ep->eid = i; 476 ep->htc = htc; 477 ep->tx_credit_flow_enabled = true; 478 } 479 } 480 481 static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, 482 u16 service_id) 483 { 484 u8 i, allocation = 0; 485 486 for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 487 if (htc->service_alloc_table[i].service_id == service_id) { 488 allocation = 489 htc->service_alloc_table[i].credit_allocation; 490 } 491 } 492 493 return allocation; 494 } 495 496 static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) 497 { 498 struct ath11k_htc_svc_tx_credits *serv_entry; 499 u32 svc_id[] = { 500 ATH11K_HTC_SVC_ID_WMI_CONTROL, 501 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, 502 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, 503 }; 504 int i, credits; 505 506 credits = htc->total_transmit_credits; 507 serv_entry = htc->service_alloc_table; 508 509 if ((htc->wmi_ep_count == 0) || 510 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 511 return -EINVAL; 512 513 /* Divide credits among number of endpoints for WMI */ 514 credits = credits / htc->wmi_ep_count; 515 for (i = 0; i < htc->wmi_ep_count; i++) { 516 serv_entry[i].service_id = svc_id[i]; 517 serv_entry[i].credit_allocation = credits; 518 } 519 520 return 0; 521 } 522 523 int ath11k_htc_wait_target(struct ath11k_htc *htc) 524 { 525 int i, status = 0; 526 struct ath11k_base *ab = htc->ab; 527 unsigned long time_left; 528 struct ath11k_htc_ready *ready; 529 u16 message_id; 530 u16 credit_count; 531 u16 credit_size; 532 533 time_left = wait_for_completion_timeout(&htc->ctl_resp, 534 ATH11K_HTC_WAIT_TIMEOUT_HZ); 535 if (!time_left) { 536 ath11k_warn(ab, "failed to receive control response completion, polling..\n"); 537 538 for (i = 0; i < ab->hw_params.ce_count; i++) 539 ath11k_ce_per_engine_service(htc->ab, i); 540 541 time_left = 542 wait_for_completion_timeout(&htc->ctl_resp, 543 ATH11K_HTC_WAIT_TIMEOUT_HZ); 544 545 if (!time_left) 546 status = -ETIMEDOUT; 547 } 548 549 if (status < 0) { 550 ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); 551 return status; 552 } 553 554 if (htc->control_resp_len < sizeof(*ready)) { 555 ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", 556 htc->control_resp_len); 557 return -ECOMM; 558 } 559 560 ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; 561 message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); 562 credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, 563 ready->id_credit_count); 564 credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); 565 566 if (message_id != ATH11K_HTC_MSG_READY_ID) { 567 ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 568 return -ECOMM; 569 } 570 571 htc->total_transmit_credits = credit_count; 572 htc->target_credit_size = credit_size; 573 574 ath11k_dbg(ab, ATH11K_DBG_HTC, 575 "target ready total_transmit_credits %d target_credit_size %d\n", 576 htc->total_transmit_credits, htc->target_credit_size); 577 578 if ((htc->total_transmit_credits == 0) || 579 (htc->target_credit_size == 0)) { 580 ath11k_warn(ab, "Invalid credit size received\n"); 581 return -ECOMM; 582 } 583 584 /* For QCA6390, wmi endpoint uses 1 credit to avoid 585 * back-to-back write. 586 */ 587 if (ab->hw_params.supports_shadow_regs) 588 htc->total_transmit_credits = 1; 589 590 ath11k_htc_setup_target_buffer_assignments(htc); 591 592 return 0; 593 } 594 595 int ath11k_htc_connect_service(struct ath11k_htc *htc, 596 struct ath11k_htc_svc_conn_req *conn_req, 597 struct ath11k_htc_svc_conn_resp *conn_resp) 598 { 599 struct ath11k_base *ab = htc->ab; 600 struct ath11k_htc_conn_svc *req_msg; 601 struct ath11k_htc_conn_svc_resp resp_msg_dummy; 602 struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 603 enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; 604 struct ath11k_htc_ep *ep; 605 struct sk_buff *skb; 606 unsigned int max_msg_size = 0; 607 int length, status; 608 unsigned long time_left; 609 bool disable_credit_flow_ctrl = false; 610 u16 message_id, service_id, flags = 0; 611 u8 tx_alloc = 0; 612 613 /* special case for HTC pseudo control service */ 614 if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { 615 disable_credit_flow_ctrl = true; 616 assigned_eid = ATH11K_HTC_EP_0; 617 max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; 618 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 619 goto setup; 620 } 621 622 tx_alloc = ath11k_htc_get_credit_allocation(htc, 623 conn_req->service_id); 624 if (!tx_alloc) 625 ath11k_dbg(ab, ATH11K_DBG_BOOT, 626 "htc service %s does not allocate target credits\n", 627 htc_service_name(conn_req->service_id)); 628 629 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 630 if (!skb) { 631 ath11k_warn(ab, "Failed to allocate HTC packet\n"); 632 return -ENOMEM; 633 } 634 635 length = sizeof(*req_msg); 636 skb_put(skb, length); 637 memset(skb->data, 0, length); 638 639 req_msg = (struct ath11k_htc_conn_svc *)skb->data; 640 req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, 641 ATH11K_HTC_MSG_CONNECT_SERVICE_ID); 642 643 flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); 644 645 /* Only enable credit flow control for WMI ctrl service */ 646 if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || 647 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 648 conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 649 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 650 disable_credit_flow_ctrl = true; 651 } 652 653 if (!ab->hw_params.credit_flow) { 654 flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 655 disable_credit_flow_ctrl = true; 656 } 657 658 req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); 659 req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, 660 conn_req->service_id); 661 662 reinit_completion(&htc->ctl_resp); 663 664 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 665 if (status) { 666 kfree_skb(skb); 667 return status; 668 } 669 670 /* wait for response */ 671 time_left = wait_for_completion_timeout(&htc->ctl_resp, 672 ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); 673 if (!time_left) { 674 ath11k_err(ab, "Service connect timeout\n"); 675 return -ETIMEDOUT; 676 } 677 678 /* we controlled the buffer creation, it's aligned */ 679 resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; 680 message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); 681 service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, 682 resp_msg->msg_svc_id); 683 684 if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 685 (htc->control_resp_len < sizeof(*resp_msg))) { 686 ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); 687 return -EPROTO; 688 } 689 690 ath11k_dbg(ab, ATH11K_DBG_HTC, 691 "service %s connect response status 0x%lx assigned ep 0x%lx\n", 692 htc_service_name(service_id), 693 FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), 694 FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); 695 696 conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, 697 resp_msg->flags_len); 698 699 /* check response status */ 700 if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { 701 ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 702 htc_service_name(service_id), 703 conn_resp->connect_resp_code); 704 return -EPROTO; 705 } 706 707 assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( 708 HTC_SVC_RESP_MSG_ENDPOINTID, 709 resp_msg->flags_len); 710 711 max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 712 resp_msg->flags_len); 713 714 setup: 715 716 if (assigned_eid >= ATH11K_HTC_EP_COUNT) 717 return -EPROTO; 718 719 if (max_msg_size == 0) 720 return -EPROTO; 721 722 ep = &htc->endpoint[assigned_eid]; 723 ep->eid = assigned_eid; 724 725 if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) 726 return -EPROTO; 727 728 /* return assigned endpoint to caller */ 729 conn_resp->eid = assigned_eid; 730 conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 731 resp_msg->flags_len); 732 733 /* setup the endpoint */ 734 ep->service_id = conn_req->service_id; 735 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 736 ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, 737 resp_msg->flags_len); 738 ep->tx_credits = tx_alloc; 739 740 /* copy all the callbacks */ 741 ep->ep_ops = conn_req->ep_ops; 742 743 status = ath11k_hif_map_service_to_pipe(htc->ab, 744 ep->service_id, 745 &ep->ul_pipe_id, 746 &ep->dl_pipe_id); 747 if (status) 748 return status; 749 750 ath11k_dbg(ab, ATH11K_DBG_BOOT, 751 "htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 752 htc_service_name(ep->service_id), ep->ul_pipe_id, 753 ep->dl_pipe_id, ep->eid); 754 755 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 756 ep->tx_credit_flow_enabled = false; 757 ath11k_dbg(ab, ATH11K_DBG_BOOT, 758 "htc service '%s' eid %d tx flow control disabled\n", 759 htc_service_name(ep->service_id), assigned_eid); 760 } 761 762 return status; 763 } 764 765 int ath11k_htc_start(struct ath11k_htc *htc) 766 { 767 struct sk_buff *skb; 768 int status = 0; 769 struct ath11k_base *ab = htc->ab; 770 struct ath11k_htc_setup_complete_extended *msg; 771 772 skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); 773 if (!skb) 774 return -ENOMEM; 775 776 skb_put(skb, sizeof(*msg)); 777 memset(skb->data, 0, skb->len); 778 779 msg = (struct ath11k_htc_setup_complete_extended *)skb->data; 780 msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, 781 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); 782 783 if (ab->hw_params.credit_flow) 784 ath11k_dbg(ab, ATH11K_DBG_HTC, "using tx credit flow control\n"); 785 else 786 msg->flags |= ATH11K_GLOBAL_DISABLE_CREDIT_FLOW; 787 788 status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); 789 if (status) { 790 kfree_skb(skb); 791 return status; 792 } 793 794 return 0; 795 } 796 797 int ath11k_htc_init(struct ath11k_base *ab) 798 { 799 struct ath11k_htc *htc = &ab->htc; 800 struct ath11k_htc_svc_conn_req conn_req; 801 struct ath11k_htc_svc_conn_resp conn_resp; 802 int ret; 803 804 spin_lock_init(&htc->tx_lock); 805 806 ath11k_htc_reset_endpoint_states(htc); 807 808 htc->ab = ab; 809 810 switch (ab->wmi_ab.preferred_hw_mode) { 811 case WMI_HOST_HW_MODE_SINGLE: 812 htc->wmi_ep_count = 1; 813 break; 814 case WMI_HOST_HW_MODE_DBS: 815 case WMI_HOST_HW_MODE_DBS_OR_SBS: 816 htc->wmi_ep_count = 2; 817 break; 818 case WMI_HOST_HW_MODE_DBS_SBS: 819 htc->wmi_ep_count = 3; 820 break; 821 default: 822 htc->wmi_ep_count = ab->hw_params.max_radios; 823 break; 824 } 825 826 /* setup our pseudo HTC control endpoint connection */ 827 memset(&conn_req, 0, sizeof(conn_req)); 828 memset(&conn_resp, 0, sizeof(conn_resp)); 829 conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; 830 conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; 831 conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; 832 conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; 833 834 /* connect fake service */ 835 ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); 836 if (ret) { 837 ath11k_err(ab, "could not connect to htc service (%d)\n", ret); 838 return ret; 839 } 840 841 init_completion(&htc->ctl_resp); 842 843 return 0; 844 } 845