1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved. 4 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. 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 *ath12k_htc_alloc_skb(struct ath12k_base *ab, int size) 13 { 14 struct sk_buff *skb; 15 16 skb = dev_alloc_skb(size + sizeof(struct ath12k_htc_hdr)); 17 if (!skb) 18 return NULL; 19 20 skb_reserve(skb, sizeof(struct ath12k_htc_hdr)); 21 22 /* FW/HTC requires 4-byte aligned streams */ 23 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 24 ath12k_warn(ab, "Unaligned HTC tx skb\n"); 25 26 return skb; 27 } 28 29 static void ath12k_htc_control_tx_complete(struct ath12k_base *ab, 30 struct sk_buff *skb) 31 { 32 kfree_skb(skb); 33 } 34 35 static struct sk_buff *ath12k_htc_build_tx_ctrl_skb(void) 36 { 37 struct sk_buff *skb; 38 struct ath12k_skb_cb *skb_cb; 39 40 skb = dev_alloc_skb(ATH12K_HTC_CONTROL_BUFFER_SIZE); 41 if (!skb) 42 return NULL; 43 44 skb_reserve(skb, sizeof(struct ath12k_htc_hdr)); 45 WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4)); 46 47 skb_cb = ATH12K_SKB_CB(skb); 48 memset(skb_cb, 0, sizeof(*skb_cb)); 49 50 return skb; 51 } 52 53 static void ath12k_htc_prepare_tx_skb(struct ath12k_htc_ep *ep, 54 struct sk_buff *skb) 55 { 56 struct ath12k_htc_hdr *hdr; 57 58 hdr = (struct ath12k_htc_hdr *)skb->data; 59 60 memset(hdr, 0, sizeof(*hdr)); 61 hdr->htc_info = le32_encode_bits(ep->eid, HTC_HDR_ENDPOINTID) | 62 le32_encode_bits((skb->len - sizeof(*hdr)), 63 HTC_HDR_PAYLOADLEN); 64 65 if (ep->tx_credit_flow_enabled) 66 hdr->htc_info |= le32_encode_bits(ATH12K_HTC_FLAG_NEED_CREDIT_UPDATE, 67 HTC_HDR_FLAGS); 68 69 spin_lock_bh(&ep->htc->tx_lock); 70 hdr->ctrl_info = le32_encode_bits(ep->seq_no++, HTC_HDR_CONTROLBYTES1); 71 spin_unlock_bh(&ep->htc->tx_lock); 72 } 73 74 int ath12k_htc_send(struct ath12k_htc *htc, 75 enum ath12k_htc_ep_id eid, 76 struct sk_buff *skb) 77 { 78 struct ath12k_htc_ep *ep = &htc->endpoint[eid]; 79 struct ath12k_skb_cb *skb_cb = ATH12K_SKB_CB(skb); 80 struct device *dev = htc->ab->dev; 81 struct ath12k_base *ab = htc->ab; 82 int credits = 0; 83 int ret; 84 85 if (eid >= ATH12K_HTC_EP_COUNT) { 86 ath12k_warn(ab, "Invalid endpoint id: %d\n", eid); 87 return -ENOENT; 88 } 89 90 skb_push(skb, sizeof(struct ath12k_htc_hdr)); 91 92 if (ep->tx_credit_flow_enabled) { 93 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 94 spin_lock_bh(&htc->tx_lock); 95 if (ep->tx_credits < credits) { 96 ath12k_dbg(ab, ATH12K_DBG_HTC, 97 "htc insufficient credits ep %d required %d available %d\n", 98 eid, credits, ep->tx_credits); 99 spin_unlock_bh(&htc->tx_lock); 100 ret = -EAGAIN; 101 goto err_pull; 102 } 103 ep->tx_credits -= credits; 104 ath12k_dbg(ab, ATH12K_DBG_HTC, 105 "htc ep %d consumed %d credits (total %d)\n", 106 eid, credits, ep->tx_credits); 107 spin_unlock_bh(&htc->tx_lock); 108 } 109 110 ath12k_htc_prepare_tx_skb(ep, skb); 111 112 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 113 ret = dma_mapping_error(dev, skb_cb->paddr); 114 if (ret) { 115 ret = -EIO; 116 goto err_credits; 117 } 118 119 ret = ath12k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); 120 if (ret) 121 goto err_unmap; 122 123 return 0; 124 125 err_unmap: 126 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 127 err_credits: 128 if (ep->tx_credit_flow_enabled) { 129 spin_lock_bh(&htc->tx_lock); 130 ep->tx_credits += credits; 131 ath12k_dbg(ab, ATH12K_DBG_HTC, 132 "htc ep %d reverted %d credits back (total %d)\n", 133 eid, credits, ep->tx_credits); 134 spin_unlock_bh(&htc->tx_lock); 135 136 if (ep->ep_ops.ep_tx_credits) 137 ep->ep_ops.ep_tx_credits(htc->ab); 138 } 139 err_pull: 140 skb_pull(skb, sizeof(struct ath12k_htc_hdr)); 141 return ret; 142 } 143 144 static void 145 ath12k_htc_process_credit_report(struct ath12k_htc *htc, 146 const struct ath12k_htc_credit_report *report, 147 int len, 148 enum ath12k_htc_ep_id eid) 149 { 150 struct ath12k_base *ab = htc->ab; 151 struct ath12k_htc_ep *ep; 152 int i, n_reports; 153 154 if (len % sizeof(*report)) 155 ath12k_warn(ab, "Uneven credit report len %d", len); 156 157 n_reports = len / sizeof(*report); 158 159 spin_lock_bh(&htc->tx_lock); 160 for (i = 0; i < n_reports; i++, report++) { 161 if (report->eid >= ATH12K_HTC_EP_COUNT) 162 break; 163 164 ep = &htc->endpoint[report->eid]; 165 ep->tx_credits += report->credits; 166 167 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 168 report->eid, report->credits, ep->tx_credits); 169 170 if (ep->ep_ops.ep_tx_credits) { 171 spin_unlock_bh(&htc->tx_lock); 172 ep->ep_ops.ep_tx_credits(htc->ab); 173 spin_lock_bh(&htc->tx_lock); 174 } 175 } 176 spin_unlock_bh(&htc->tx_lock); 177 } 178 179 static int ath12k_htc_process_trailer(struct ath12k_htc *htc, 180 u8 *buffer, 181 int length, 182 enum ath12k_htc_ep_id src_eid) 183 { 184 struct ath12k_base *ab = htc->ab; 185 int status = 0; 186 struct ath12k_htc_record *record; 187 size_t len; 188 189 while (length > 0) { 190 record = (struct ath12k_htc_record *)buffer; 191 192 if (length < sizeof(record->hdr)) { 193 status = -EINVAL; 194 break; 195 } 196 197 if (record->hdr.len > length) { 198 /* no room left in buffer for record */ 199 ath12k_warn(ab, "Invalid record length: %d\n", 200 record->hdr.len); 201 status = -EINVAL; 202 break; 203 } 204 205 switch (record->hdr.id) { 206 case ATH12K_HTC_RECORD_CREDITS: 207 len = sizeof(struct ath12k_htc_credit_report); 208 if (record->hdr.len < len) { 209 ath12k_warn(ab, "Credit report too long\n"); 210 status = -EINVAL; 211 break; 212 } 213 ath12k_htc_process_credit_report(htc, 214 record->credit_report, 215 record->hdr.len, 216 src_eid); 217 break; 218 default: 219 ath12k_warn(ab, "Unhandled record: id:%d length:%d\n", 220 record->hdr.id, record->hdr.len); 221 break; 222 } 223 224 if (status) 225 break; 226 227 /* multiple records may be present in a trailer */ 228 buffer += sizeof(record->hdr) + record->hdr.len; 229 length -= sizeof(record->hdr) + record->hdr.len; 230 } 231 232 return status; 233 } 234 235 static void ath12k_htc_suspend_complete(struct ath12k_base *ab, bool ack) 236 { 237 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot suspend complete %d\n", ack); 238 239 if (ack) 240 set_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 241 else 242 clear_bit(ATH12K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags); 243 244 complete(&ab->htc_suspend); 245 } 246 247 static void ath12k_htc_wakeup_from_suspend(struct ath12k_base *ab) 248 { 249 ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot wakeup from suspend is received\n"); 250 } 251 252 void ath12k_htc_rx_completion_handler(struct ath12k_base *ab, 253 struct sk_buff *skb) 254 { 255 int status = 0; 256 struct ath12k_htc *htc = &ab->htc; 257 struct ath12k_htc_hdr *hdr; 258 struct ath12k_htc_ep *ep; 259 u16 payload_len; 260 u32 trailer_len = 0; 261 size_t min_len; 262 u8 eid; 263 bool trailer_present; 264 265 hdr = (struct ath12k_htc_hdr *)skb->data; 266 skb_pull(skb, sizeof(*hdr)); 267 268 eid = le32_get_bits(hdr->htc_info, HTC_HDR_ENDPOINTID); 269 270 if (eid >= ATH12K_HTC_EP_COUNT) { 271 ath12k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 272 goto out; 273 } 274 275 ep = &htc->endpoint[eid]; 276 277 payload_len = le32_get_bits(hdr->htc_info, HTC_HDR_PAYLOADLEN); 278 279 if (payload_len + sizeof(*hdr) > ATH12K_HTC_MAX_LEN) { 280 ath12k_warn(ab, "HTC rx frame too long, len: %zu\n", 281 payload_len + sizeof(*hdr)); 282 goto out; 283 } 284 285 if (skb->len < payload_len) { 286 ath12k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 287 skb->len, payload_len); 288 goto out; 289 } 290 291 /* get flags to check for trailer */ 292 trailer_present = le32_get_bits(hdr->htc_info, HTC_HDR_FLAGS) & 293 ATH12K_HTC_FLAG_TRAILER_PRESENT; 294 295 if (trailer_present) { 296 u8 *trailer; 297 298 trailer_len = le32_get_bits(hdr->ctrl_info, 299 HTC_HDR_CONTROLBYTES0); 300 min_len = sizeof(struct ath12k_htc_record_hdr); 301 302 if ((trailer_len < min_len) || 303 (trailer_len > payload_len)) { 304 ath12k_warn(ab, "Invalid trailer length: %d\n", 305 trailer_len); 306 goto out; 307 } 308 309 trailer = (u8 *)hdr; 310 trailer += sizeof(*hdr); 311 trailer += payload_len; 312 trailer -= trailer_len; 313 status = ath12k_htc_process_trailer(htc, trailer, 314 trailer_len, eid); 315 if (status) 316 goto out; 317 318 skb_trim(skb, skb->len - trailer_len); 319 } 320 321 if (trailer_len >= payload_len) 322 /* zero length packet with trailer data, just drop these */ 323 goto out; 324 325 if (eid == ATH12K_HTC_EP_0) { 326 struct ath12k_htc_msg *msg = (struct ath12k_htc_msg *)skb->data; 327 328 switch (le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)) { 329 case ATH12K_HTC_MSG_READY_ID: 330 case ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 331 /* handle HTC control message */ 332 if (completion_done(&htc->ctl_resp)) { 333 /* this is a fatal error, target should not be 334 * sending unsolicited messages on the ep 0 335 */ 336 ath12k_warn(ab, "HTC rx ctrl still processing\n"); 337 complete(&htc->ctl_resp); 338 goto out; 339 } 340 341 htc->control_resp_len = 342 min_t(int, skb->len, 343 ATH12K_HTC_MAX_CTRL_MSG_LEN); 344 345 memcpy(htc->control_resp_buffer, skb->data, 346 htc->control_resp_len); 347 348 complete(&htc->ctl_resp); 349 break; 350 case ATH12K_HTC_MSG_SEND_SUSPEND_COMPLETE: 351 ath12k_htc_suspend_complete(ab, true); 352 break; 353 case ATH12K_HTC_MSG_NACK_SUSPEND: 354 ath12k_htc_suspend_complete(ab, false); 355 break; 356 case ATH12K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 357 ath12k_htc_wakeup_from_suspend(ab); 358 break; 359 default: 360 ath12k_warn(ab, "ignoring unsolicited htc ep0 event %u\n", 361 le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)); 362 break; 363 } 364 goto out; 365 } 366 367 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc rx completion ep %d skb %p\n", 368 eid, skb); 369 ep->ep_ops.ep_rx_complete(ab, skb); 370 371 /* poll tx completion for interrupt disabled CE's */ 372 ath12k_ce_poll_send_completed(ab, ep->ul_pipe_id); 373 374 /* skb is now owned by the rx completion handler */ 375 skb = NULL; 376 out: 377 kfree_skb(skb); 378 } 379 EXPORT_SYMBOL(ath12k_htc_rx_completion_handler); 380 381 static void ath12k_htc_control_rx_complete(struct ath12k_base *ab, 382 struct sk_buff *skb) 383 { 384 /* This is unexpected. FW is not supposed to send regular rx on this 385 * endpoint. 386 */ 387 ath12k_warn(ab, "unexpected htc rx\n"); 388 kfree_skb(skb); 389 } 390 391 static const char *htc_service_name(enum ath12k_htc_svc_id id) 392 { 393 switch (id) { 394 case ATH12K_HTC_SVC_ID_RESERVED: 395 return "Reserved"; 396 case ATH12K_HTC_SVC_ID_RSVD_CTRL: 397 return "Control"; 398 case ATH12K_HTC_SVC_ID_WMI_CONTROL: 399 return "WMI"; 400 case ATH12K_HTC_SVC_ID_WMI_DATA_BE: 401 return "DATA BE"; 402 case ATH12K_HTC_SVC_ID_WMI_DATA_BK: 403 return "DATA BK"; 404 case ATH12K_HTC_SVC_ID_WMI_DATA_VI: 405 return "DATA VI"; 406 case ATH12K_HTC_SVC_ID_WMI_DATA_VO: 407 return "DATA VO"; 408 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1: 409 return "WMI MAC1"; 410 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2: 411 return "WMI MAC2"; 412 case ATH12K_HTC_SVC_ID_NMI_CONTROL: 413 return "NMI Control"; 414 case ATH12K_HTC_SVC_ID_NMI_DATA: 415 return "NMI Data"; 416 case ATH12K_HTC_SVC_ID_HTT_DATA_MSG: 417 return "HTT Data"; 418 case ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS: 419 return "RAW"; 420 case ATH12K_HTC_SVC_ID_IPA_TX: 421 return "IPA TX"; 422 case ATH12K_HTC_SVC_ID_PKT_LOG: 423 return "PKT LOG"; 424 case ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG: 425 return "WMI DIAG"; 426 } 427 428 return "Unknown"; 429 } 430 431 static void ath12k_htc_reset_endpoint_states(struct ath12k_htc *htc) 432 { 433 struct ath12k_htc_ep *ep; 434 int i; 435 436 for (i = ATH12K_HTC_EP_0; i < ATH12K_HTC_EP_COUNT; i++) { 437 ep = &htc->endpoint[i]; 438 ep->service_id = ATH12K_HTC_SVC_ID_UNUSED; 439 ep->max_ep_message_len = 0; 440 ep->max_tx_queue_depth = 0; 441 ep->eid = i; 442 ep->htc = htc; 443 ep->tx_credit_flow_enabled = true; 444 } 445 } 446 447 static u8 ath12k_htc_get_credit_allocation(struct ath12k_htc *htc, 448 u16 service_id) 449 { 450 struct ath12k_htc_svc_tx_credits *serv_entry; 451 u8 i, allocation = 0; 452 453 serv_entry = htc->service_alloc_table; 454 455 for (i = 0; i < ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 456 if (serv_entry[i].service_id == service_id) { 457 allocation = serv_entry[i].credit_allocation; 458 break; 459 } 460 } 461 462 return allocation; 463 } 464 465 static int ath12k_htc_setup_target_buffer_assignments(struct ath12k_htc *htc) 466 { 467 struct ath12k_htc_svc_tx_credits *serv_entry; 468 static const u32 svc_id[] = { 469 ATH12K_HTC_SVC_ID_WMI_CONTROL, 470 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1, 471 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2, 472 }; 473 int i, credits; 474 475 credits = htc->total_transmit_credits; 476 serv_entry = htc->service_alloc_table; 477 478 if ((htc->wmi_ep_count == 0) || 479 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 480 return -EINVAL; 481 482 /* Divide credits among number of endpoints for WMI */ 483 credits = credits / htc->wmi_ep_count; 484 for (i = 0; i < htc->wmi_ep_count; i++) { 485 serv_entry[i].service_id = svc_id[i]; 486 serv_entry[i].credit_allocation = credits; 487 } 488 489 return 0; 490 } 491 492 int ath12k_htc_wait_target(struct ath12k_htc *htc) 493 { 494 int i, status = 0; 495 struct ath12k_base *ab = htc->ab; 496 unsigned long time_left; 497 struct ath12k_htc_ready *ready; 498 u16 message_id; 499 u16 credit_count; 500 u16 credit_size; 501 502 time_left = wait_for_completion_timeout(&htc->ctl_resp, 503 ATH12K_HTC_WAIT_TIMEOUT_HZ); 504 if (!time_left) { 505 ath12k_warn(ab, "failed to receive control response completion, polling..\n"); 506 507 for (i = 0; i < ab->hw_params->ce_count; i++) 508 ath12k_ce_per_engine_service(htc->ab, i); 509 510 time_left = 511 wait_for_completion_timeout(&htc->ctl_resp, 512 ATH12K_HTC_WAIT_TIMEOUT_HZ); 513 514 if (!time_left) 515 status = -ETIMEDOUT; 516 } 517 518 if (status < 0) { 519 ath12k_warn(ab, "ctl_resp never came in (%d)\n", status); 520 return status; 521 } 522 523 if (htc->control_resp_len < sizeof(*ready)) { 524 ath12k_warn(ab, "Invalid HTC ready msg len:%d\n", 525 htc->control_resp_len); 526 return -ECOMM; 527 } 528 529 ready = (struct ath12k_htc_ready *)htc->control_resp_buffer; 530 message_id = le32_get_bits(ready->id_credit_count, HTC_MSG_MESSAGEID); 531 credit_count = le32_get_bits(ready->id_credit_count, 532 HTC_READY_MSG_CREDITCOUNT); 533 credit_size = le32_get_bits(ready->size_ep, HTC_READY_MSG_CREDITSIZE); 534 535 if (message_id != ATH12K_HTC_MSG_READY_ID) { 536 ath12k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 537 return -ECOMM; 538 } 539 540 htc->total_transmit_credits = credit_count; 541 htc->target_credit_size = credit_size; 542 543 ath12k_dbg(ab, ATH12K_DBG_HTC, 544 "Target ready! transmit resources: %d size:%d\n", 545 htc->total_transmit_credits, htc->target_credit_size); 546 547 if ((htc->total_transmit_credits == 0) || 548 (htc->target_credit_size == 0)) { 549 ath12k_warn(ab, "Invalid credit size received\n"); 550 return -ECOMM; 551 } 552 553 ath12k_htc_setup_target_buffer_assignments(htc); 554 555 return 0; 556 } 557 558 int ath12k_htc_connect_service(struct ath12k_htc *htc, 559 struct ath12k_htc_svc_conn_req *conn_req, 560 struct ath12k_htc_svc_conn_resp *conn_resp) 561 { 562 struct ath12k_base *ab = htc->ab; 563 struct ath12k_htc_conn_svc *req_msg; 564 struct ath12k_htc_conn_svc_resp resp_msg_dummy; 565 struct ath12k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 566 enum ath12k_htc_ep_id assigned_eid = ATH12K_HTC_EP_COUNT; 567 struct ath12k_htc_ep *ep; 568 struct sk_buff *skb; 569 unsigned int max_msg_size = 0; 570 int length, status; 571 unsigned long time_left; 572 bool disable_credit_flow_ctrl = false; 573 u16 message_id, service_id, flags = 0; 574 u8 tx_alloc = 0; 575 576 /* special case for HTC pseudo control service */ 577 if (conn_req->service_id == ATH12K_HTC_SVC_ID_RSVD_CTRL) { 578 disable_credit_flow_ctrl = true; 579 assigned_eid = ATH12K_HTC_EP_0; 580 max_msg_size = ATH12K_HTC_MAX_CTRL_MSG_LEN; 581 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 582 goto setup; 583 } 584 585 tx_alloc = ath12k_htc_get_credit_allocation(htc, 586 conn_req->service_id); 587 if (!tx_alloc) 588 ath12k_dbg(ab, ATH12K_DBG_BOOT, 589 "boot htc service %s does not allocate target credits\n", 590 htc_service_name(conn_req->service_id)); 591 592 skb = ath12k_htc_build_tx_ctrl_skb(); 593 if (!skb) { 594 ath12k_warn(ab, "Failed to allocate HTC packet\n"); 595 return -ENOMEM; 596 } 597 598 length = sizeof(*req_msg); 599 skb_put(skb, length); 600 memset(skb->data, 0, length); 601 602 req_msg = (struct ath12k_htc_conn_svc *)skb->data; 603 req_msg->msg_svc_id = le32_encode_bits(ATH12K_HTC_MSG_CONNECT_SERVICE_ID, 604 HTC_MSG_MESSAGEID); 605 606 flags |= u32_encode_bits(tx_alloc, ATH12K_HTC_CONN_FLAGS_RECV_ALLOC); 607 608 /* Only enable credit flow control for WMI ctrl service */ 609 if (!(conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL || 610 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 611 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 612 flags |= ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 613 disable_credit_flow_ctrl = true; 614 } 615 616 req_msg->flags_len = le32_encode_bits(flags, HTC_SVC_MSG_CONNECTIONFLAGS); 617 req_msg->msg_svc_id |= le32_encode_bits(conn_req->service_id, 618 HTC_SVC_MSG_SERVICE_ID); 619 620 reinit_completion(&htc->ctl_resp); 621 622 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 623 if (status) { 624 kfree_skb(skb); 625 return status; 626 } 627 628 /* wait for response */ 629 time_left = wait_for_completion_timeout(&htc->ctl_resp, 630 ATH12K_HTC_CONN_SVC_TIMEOUT_HZ); 631 if (!time_left) { 632 ath12k_err(ab, "Service connect timeout\n"); 633 return -ETIMEDOUT; 634 } 635 636 /* we controlled the buffer creation, it's aligned */ 637 resp_msg = (struct ath12k_htc_conn_svc_resp *)htc->control_resp_buffer; 638 message_id = le32_get_bits(resp_msg->msg_svc_id, HTC_MSG_MESSAGEID); 639 service_id = le32_get_bits(resp_msg->msg_svc_id, 640 HTC_SVC_RESP_MSG_SERVICEID); 641 642 if ((message_id != ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 643 (htc->control_resp_len < sizeof(*resp_msg))) { 644 ath12k_err(ab, "Invalid resp message ID 0x%x", message_id); 645 return -EPROTO; 646 } 647 648 ath12k_dbg(ab, ATH12K_DBG_HTC, 649 "HTC Service %s connect response: status: %u, assigned ep: %u\n", 650 htc_service_name(service_id), 651 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_STATUS), 652 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_ENDPOINTID)); 653 654 conn_resp->connect_resp_code = le32_get_bits(resp_msg->flags_len, 655 HTC_SVC_RESP_MSG_STATUS); 656 657 /* check response status */ 658 if (conn_resp->connect_resp_code != ATH12K_HTC_CONN_SVC_STATUS_SUCCESS) { 659 ath12k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 660 htc_service_name(service_id), 661 conn_resp->connect_resp_code); 662 return -EPROTO; 663 } 664 665 assigned_eid = le32_get_bits(resp_msg->flags_len, 666 HTC_SVC_RESP_MSG_ENDPOINTID); 667 668 max_msg_size = le32_get_bits(resp_msg->flags_len, 669 HTC_SVC_RESP_MSG_MAXMSGSIZE); 670 671 setup: 672 673 if (assigned_eid >= ATH12K_HTC_EP_COUNT) 674 return -EPROTO; 675 676 if (max_msg_size == 0) 677 return -EPROTO; 678 679 ep = &htc->endpoint[assigned_eid]; 680 ep->eid = assigned_eid; 681 682 if (ep->service_id != ATH12K_HTC_SVC_ID_UNUSED) 683 return -EPROTO; 684 685 /* return assigned endpoint to caller */ 686 conn_resp->eid = assigned_eid; 687 conn_resp->max_msg_len = le32_get_bits(resp_msg->flags_len, 688 HTC_SVC_RESP_MSG_MAXMSGSIZE); 689 690 /* setup the endpoint */ 691 ep->service_id = conn_req->service_id; 692 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 693 ep->max_ep_message_len = le32_get_bits(resp_msg->flags_len, 694 HTC_SVC_RESP_MSG_MAXMSGSIZE); 695 ep->tx_credits = tx_alloc; 696 697 /* copy all the callbacks */ 698 ep->ep_ops = conn_req->ep_ops; 699 700 status = ath12k_hif_map_service_to_pipe(htc->ab, 701 ep->service_id, 702 &ep->ul_pipe_id, 703 &ep->dl_pipe_id); 704 if (status) 705 return status; 706 707 ath12k_dbg(ab, ATH12K_DBG_BOOT, 708 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 709 htc_service_name(ep->service_id), ep->ul_pipe_id, 710 ep->dl_pipe_id, ep->eid); 711 712 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 713 ep->tx_credit_flow_enabled = false; 714 ath12k_dbg(ab, ATH12K_DBG_BOOT, 715 "boot htc service '%s' eid %d TX flow control disabled\n", 716 htc_service_name(ep->service_id), assigned_eid); 717 } 718 719 return status; 720 } 721 722 int ath12k_htc_start(struct ath12k_htc *htc) 723 { 724 struct sk_buff *skb; 725 int status; 726 struct ath12k_base *ab = htc->ab; 727 struct ath12k_htc_setup_complete_extended *msg; 728 729 skb = ath12k_htc_build_tx_ctrl_skb(); 730 if (!skb) 731 return -ENOMEM; 732 733 skb_put(skb, sizeof(*msg)); 734 memset(skb->data, 0, skb->len); 735 736 msg = (struct ath12k_htc_setup_complete_extended *)skb->data; 737 msg->msg_id = le32_encode_bits(ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID, 738 HTC_MSG_MESSAGEID); 739 740 ath12k_dbg(ab, ATH12K_DBG_HTC, "HTC is using TX credit flow control\n"); 741 742 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 743 if (status) { 744 kfree_skb(skb); 745 return status; 746 } 747 748 return 0; 749 } 750 751 int ath12k_htc_init(struct ath12k_base *ab) 752 { 753 struct ath12k_htc *htc = &ab->htc; 754 struct ath12k_htc_svc_conn_req conn_req = { }; 755 struct ath12k_htc_svc_conn_resp conn_resp = { }; 756 int ret; 757 758 spin_lock_init(&htc->tx_lock); 759 760 ath12k_htc_reset_endpoint_states(htc); 761 762 htc->ab = ab; 763 764 switch (ab->wmi_ab.preferred_hw_mode) { 765 case WMI_HOST_HW_MODE_SINGLE: 766 htc->wmi_ep_count = 1; 767 break; 768 case WMI_HOST_HW_MODE_DBS: 769 case WMI_HOST_HW_MODE_DBS_OR_SBS: 770 htc->wmi_ep_count = 2; 771 break; 772 case WMI_HOST_HW_MODE_DBS_SBS: 773 htc->wmi_ep_count = 3; 774 break; 775 default: 776 htc->wmi_ep_count = ab->hw_params->max_radios; 777 break; 778 } 779 780 /* setup our pseudo HTC control endpoint connection */ 781 conn_req.ep_ops.ep_tx_complete = ath12k_htc_control_tx_complete; 782 conn_req.ep_ops.ep_rx_complete = ath12k_htc_control_rx_complete; 783 conn_req.max_send_queue_depth = ATH12K_NUM_CONTROL_TX_BUFFERS; 784 conn_req.service_id = ATH12K_HTC_SVC_ID_RSVD_CTRL; 785 786 /* connect fake service */ 787 ret = ath12k_htc_connect_service(htc, &conn_req, &conn_resp); 788 if (ret) { 789 ath12k_err(ab, "could not connect to htc service (%d)\n", ret); 790 return ret; 791 } 792 793 init_completion(&htc->ctl_resp); 794 795 return 0; 796 } 797