1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved. 4 * Copyright (c) 2021-2022, 2024 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 *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 } 379 380 static void ath12k_htc_control_rx_complete(struct ath12k_base *ab, 381 struct sk_buff *skb) 382 { 383 /* This is unexpected. FW is not supposed to send regular rx on this 384 * endpoint. 385 */ 386 ath12k_warn(ab, "unexpected htc rx\n"); 387 kfree_skb(skb); 388 } 389 390 static const char *htc_service_name(enum ath12k_htc_svc_id id) 391 { 392 switch (id) { 393 case ATH12K_HTC_SVC_ID_RESERVED: 394 return "Reserved"; 395 case ATH12K_HTC_SVC_ID_RSVD_CTRL: 396 return "Control"; 397 case ATH12K_HTC_SVC_ID_WMI_CONTROL: 398 return "WMI"; 399 case ATH12K_HTC_SVC_ID_WMI_DATA_BE: 400 return "DATA BE"; 401 case ATH12K_HTC_SVC_ID_WMI_DATA_BK: 402 return "DATA BK"; 403 case ATH12K_HTC_SVC_ID_WMI_DATA_VI: 404 return "DATA VI"; 405 case ATH12K_HTC_SVC_ID_WMI_DATA_VO: 406 return "DATA VO"; 407 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1: 408 return "WMI MAC1"; 409 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2: 410 return "WMI MAC2"; 411 case ATH12K_HTC_SVC_ID_NMI_CONTROL: 412 return "NMI Control"; 413 case ATH12K_HTC_SVC_ID_NMI_DATA: 414 return "NMI Data"; 415 case ATH12K_HTC_SVC_ID_HTT_DATA_MSG: 416 return "HTT Data"; 417 case ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS: 418 return "RAW"; 419 case ATH12K_HTC_SVC_ID_IPA_TX: 420 return "IPA TX"; 421 case ATH12K_HTC_SVC_ID_PKT_LOG: 422 return "PKT LOG"; 423 case ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG: 424 return "WMI DIAG"; 425 } 426 427 return "Unknown"; 428 } 429 430 static void ath12k_htc_reset_endpoint_states(struct ath12k_htc *htc) 431 { 432 struct ath12k_htc_ep *ep; 433 int i; 434 435 for (i = ATH12K_HTC_EP_0; i < ATH12K_HTC_EP_COUNT; i++) { 436 ep = &htc->endpoint[i]; 437 ep->service_id = ATH12K_HTC_SVC_ID_UNUSED; 438 ep->max_ep_message_len = 0; 439 ep->max_tx_queue_depth = 0; 440 ep->eid = i; 441 ep->htc = htc; 442 ep->tx_credit_flow_enabled = true; 443 } 444 } 445 446 static u8 ath12k_htc_get_credit_allocation(struct ath12k_htc *htc, 447 u16 service_id) 448 { 449 struct ath12k_htc_svc_tx_credits *serv_entry; 450 u8 i, allocation = 0; 451 452 serv_entry = htc->service_alloc_table; 453 454 for (i = 0; i < ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 455 if (serv_entry[i].service_id == service_id) { 456 allocation = serv_entry[i].credit_allocation; 457 break; 458 } 459 } 460 461 return allocation; 462 } 463 464 static int ath12k_htc_setup_target_buffer_assignments(struct ath12k_htc *htc) 465 { 466 struct ath12k_htc_svc_tx_credits *serv_entry; 467 static const u32 svc_id[] = { 468 ATH12K_HTC_SVC_ID_WMI_CONTROL, 469 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1, 470 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2, 471 }; 472 int i, credits; 473 474 credits = htc->total_transmit_credits; 475 serv_entry = htc->service_alloc_table; 476 477 if ((htc->wmi_ep_count == 0) || 478 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 479 return -EINVAL; 480 481 /* Divide credits among number of endpoints for WMI */ 482 credits = credits / htc->wmi_ep_count; 483 for (i = 0; i < htc->wmi_ep_count; i++) { 484 serv_entry[i].service_id = svc_id[i]; 485 serv_entry[i].credit_allocation = credits; 486 } 487 488 return 0; 489 } 490 491 int ath12k_htc_wait_target(struct ath12k_htc *htc) 492 { 493 int i, status = 0; 494 struct ath12k_base *ab = htc->ab; 495 unsigned long time_left; 496 struct ath12k_htc_ready *ready; 497 u16 message_id; 498 u16 credit_count; 499 u16 credit_size; 500 501 time_left = wait_for_completion_timeout(&htc->ctl_resp, 502 ATH12K_HTC_WAIT_TIMEOUT_HZ); 503 if (!time_left) { 504 ath12k_warn(ab, "failed to receive control response completion, polling..\n"); 505 506 for (i = 0; i < ab->hw_params->ce_count; i++) 507 ath12k_ce_per_engine_service(htc->ab, i); 508 509 time_left = 510 wait_for_completion_timeout(&htc->ctl_resp, 511 ATH12K_HTC_WAIT_TIMEOUT_HZ); 512 513 if (!time_left) 514 status = -ETIMEDOUT; 515 } 516 517 if (status < 0) { 518 ath12k_warn(ab, "ctl_resp never came in (%d)\n", status); 519 return status; 520 } 521 522 if (htc->control_resp_len < sizeof(*ready)) { 523 ath12k_warn(ab, "Invalid HTC ready msg len:%d\n", 524 htc->control_resp_len); 525 return -ECOMM; 526 } 527 528 ready = (struct ath12k_htc_ready *)htc->control_resp_buffer; 529 message_id = le32_get_bits(ready->id_credit_count, HTC_MSG_MESSAGEID); 530 credit_count = le32_get_bits(ready->id_credit_count, 531 HTC_READY_MSG_CREDITCOUNT); 532 credit_size = le32_get_bits(ready->size_ep, HTC_READY_MSG_CREDITSIZE); 533 534 if (message_id != ATH12K_HTC_MSG_READY_ID) { 535 ath12k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 536 return -ECOMM; 537 } 538 539 htc->total_transmit_credits = credit_count; 540 htc->target_credit_size = credit_size; 541 542 ath12k_dbg(ab, ATH12K_DBG_HTC, 543 "Target ready! transmit resources: %d size:%d\n", 544 htc->total_transmit_credits, htc->target_credit_size); 545 546 if ((htc->total_transmit_credits == 0) || 547 (htc->target_credit_size == 0)) { 548 ath12k_warn(ab, "Invalid credit size received\n"); 549 return -ECOMM; 550 } 551 552 ath12k_htc_setup_target_buffer_assignments(htc); 553 554 return 0; 555 } 556 557 int ath12k_htc_connect_service(struct ath12k_htc *htc, 558 struct ath12k_htc_svc_conn_req *conn_req, 559 struct ath12k_htc_svc_conn_resp *conn_resp) 560 { 561 struct ath12k_base *ab = htc->ab; 562 struct ath12k_htc_conn_svc *req_msg; 563 struct ath12k_htc_conn_svc_resp resp_msg_dummy; 564 struct ath12k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 565 enum ath12k_htc_ep_id assigned_eid = ATH12K_HTC_EP_COUNT; 566 struct ath12k_htc_ep *ep; 567 struct sk_buff *skb; 568 unsigned int max_msg_size = 0; 569 int length, status; 570 unsigned long time_left; 571 bool disable_credit_flow_ctrl = false; 572 u16 message_id, service_id, flags = 0; 573 u8 tx_alloc = 0; 574 575 /* special case for HTC pseudo control service */ 576 if (conn_req->service_id == ATH12K_HTC_SVC_ID_RSVD_CTRL) { 577 disable_credit_flow_ctrl = true; 578 assigned_eid = ATH12K_HTC_EP_0; 579 max_msg_size = ATH12K_HTC_MAX_CTRL_MSG_LEN; 580 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 581 goto setup; 582 } 583 584 tx_alloc = ath12k_htc_get_credit_allocation(htc, 585 conn_req->service_id); 586 if (!tx_alloc) 587 ath12k_dbg(ab, ATH12K_DBG_BOOT, 588 "boot htc service %s does not allocate target credits\n", 589 htc_service_name(conn_req->service_id)); 590 591 skb = ath12k_htc_build_tx_ctrl_skb(); 592 if (!skb) { 593 ath12k_warn(ab, "Failed to allocate HTC packet\n"); 594 return -ENOMEM; 595 } 596 597 length = sizeof(*req_msg); 598 skb_put(skb, length); 599 memset(skb->data, 0, length); 600 601 req_msg = (struct ath12k_htc_conn_svc *)skb->data; 602 req_msg->msg_svc_id = le32_encode_bits(ATH12K_HTC_MSG_CONNECT_SERVICE_ID, 603 HTC_MSG_MESSAGEID); 604 605 flags |= u32_encode_bits(tx_alloc, ATH12K_HTC_CONN_FLAGS_RECV_ALLOC); 606 607 /* Only enable credit flow control for WMI ctrl service */ 608 if (!(conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL || 609 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 610 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 611 flags |= ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 612 disable_credit_flow_ctrl = true; 613 } 614 615 req_msg->flags_len = le32_encode_bits(flags, HTC_SVC_MSG_CONNECTIONFLAGS); 616 req_msg->msg_svc_id |= le32_encode_bits(conn_req->service_id, 617 HTC_SVC_MSG_SERVICE_ID); 618 619 reinit_completion(&htc->ctl_resp); 620 621 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 622 if (status) { 623 kfree_skb(skb); 624 return status; 625 } 626 627 /* wait for response */ 628 time_left = wait_for_completion_timeout(&htc->ctl_resp, 629 ATH12K_HTC_CONN_SVC_TIMEOUT_HZ); 630 if (!time_left) { 631 ath12k_err(ab, "Service connect timeout\n"); 632 return -ETIMEDOUT; 633 } 634 635 /* we controlled the buffer creation, it's aligned */ 636 resp_msg = (struct ath12k_htc_conn_svc_resp *)htc->control_resp_buffer; 637 message_id = le32_get_bits(resp_msg->msg_svc_id, HTC_MSG_MESSAGEID); 638 service_id = le32_get_bits(resp_msg->msg_svc_id, 639 HTC_SVC_RESP_MSG_SERVICEID); 640 641 if ((message_id != ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 642 (htc->control_resp_len < sizeof(*resp_msg))) { 643 ath12k_err(ab, "Invalid resp message ID 0x%x", message_id); 644 return -EPROTO; 645 } 646 647 ath12k_dbg(ab, ATH12K_DBG_HTC, 648 "HTC Service %s connect response: status: %u, assigned ep: %u\n", 649 htc_service_name(service_id), 650 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_STATUS), 651 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_ENDPOINTID)); 652 653 conn_resp->connect_resp_code = le32_get_bits(resp_msg->flags_len, 654 HTC_SVC_RESP_MSG_STATUS); 655 656 /* check response status */ 657 if (conn_resp->connect_resp_code != ATH12K_HTC_CONN_SVC_STATUS_SUCCESS) { 658 ath12k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 659 htc_service_name(service_id), 660 conn_resp->connect_resp_code); 661 return -EPROTO; 662 } 663 664 assigned_eid = le32_get_bits(resp_msg->flags_len, 665 HTC_SVC_RESP_MSG_ENDPOINTID); 666 667 max_msg_size = le32_get_bits(resp_msg->flags_len, 668 HTC_SVC_RESP_MSG_MAXMSGSIZE); 669 670 setup: 671 672 if (assigned_eid >= ATH12K_HTC_EP_COUNT) 673 return -EPROTO; 674 675 if (max_msg_size == 0) 676 return -EPROTO; 677 678 ep = &htc->endpoint[assigned_eid]; 679 ep->eid = assigned_eid; 680 681 if (ep->service_id != ATH12K_HTC_SVC_ID_UNUSED) 682 return -EPROTO; 683 684 /* return assigned endpoint to caller */ 685 conn_resp->eid = assigned_eid; 686 conn_resp->max_msg_len = le32_get_bits(resp_msg->flags_len, 687 HTC_SVC_RESP_MSG_MAXMSGSIZE); 688 689 /* setup the endpoint */ 690 ep->service_id = conn_req->service_id; 691 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 692 ep->max_ep_message_len = le32_get_bits(resp_msg->flags_len, 693 HTC_SVC_RESP_MSG_MAXMSGSIZE); 694 ep->tx_credits = tx_alloc; 695 696 /* copy all the callbacks */ 697 ep->ep_ops = conn_req->ep_ops; 698 699 status = ath12k_hif_map_service_to_pipe(htc->ab, 700 ep->service_id, 701 &ep->ul_pipe_id, 702 &ep->dl_pipe_id); 703 if (status) 704 return status; 705 706 ath12k_dbg(ab, ATH12K_DBG_BOOT, 707 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 708 htc_service_name(ep->service_id), ep->ul_pipe_id, 709 ep->dl_pipe_id, ep->eid); 710 711 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 712 ep->tx_credit_flow_enabled = false; 713 ath12k_dbg(ab, ATH12K_DBG_BOOT, 714 "boot htc service '%s' eid %d TX flow control disabled\n", 715 htc_service_name(ep->service_id), assigned_eid); 716 } 717 718 return status; 719 } 720 721 int ath12k_htc_start(struct ath12k_htc *htc) 722 { 723 struct sk_buff *skb; 724 int status; 725 struct ath12k_base *ab = htc->ab; 726 struct ath12k_htc_setup_complete_extended *msg; 727 728 skb = ath12k_htc_build_tx_ctrl_skb(); 729 if (!skb) 730 return -ENOMEM; 731 732 skb_put(skb, sizeof(*msg)); 733 memset(skb->data, 0, skb->len); 734 735 msg = (struct ath12k_htc_setup_complete_extended *)skb->data; 736 msg->msg_id = le32_encode_bits(ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID, 737 HTC_MSG_MESSAGEID); 738 739 ath12k_dbg(ab, ATH12K_DBG_HTC, "HTC is using TX credit flow control\n"); 740 741 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 742 if (status) { 743 kfree_skb(skb); 744 return status; 745 } 746 747 return 0; 748 } 749 750 int ath12k_htc_init(struct ath12k_base *ab) 751 { 752 struct ath12k_htc *htc = &ab->htc; 753 struct ath12k_htc_svc_conn_req conn_req = { }; 754 struct ath12k_htc_svc_conn_resp conn_resp = { }; 755 int ret; 756 757 spin_lock_init(&htc->tx_lock); 758 759 ath12k_htc_reset_endpoint_states(htc); 760 761 htc->ab = ab; 762 763 switch (ab->wmi_ab.preferred_hw_mode) { 764 case WMI_HOST_HW_MODE_SINGLE: 765 htc->wmi_ep_count = 1; 766 break; 767 case WMI_HOST_HW_MODE_DBS: 768 case WMI_HOST_HW_MODE_DBS_OR_SBS: 769 htc->wmi_ep_count = 2; 770 break; 771 case WMI_HOST_HW_MODE_DBS_SBS: 772 htc->wmi_ep_count = 3; 773 break; 774 default: 775 htc->wmi_ep_count = ab->hw_params->max_radios; 776 break; 777 } 778 779 /* setup our pseudo HTC control endpoint connection */ 780 conn_req.ep_ops.ep_tx_complete = ath12k_htc_control_tx_complete; 781 conn_req.ep_ops.ep_rx_complete = ath12k_htc_control_rx_complete; 782 conn_req.max_send_queue_depth = ATH12K_NUM_CONTROL_TX_BUFFERS; 783 conn_req.service_id = ATH12K_HTC_SVC_ID_RSVD_CTRL; 784 785 /* connect fake service */ 786 ret = ath12k_htc_connect_service(htc, &conn_req, &conn_resp); 787 if (ret) { 788 ath12k_err(ab, "could not connect to htc service (%d)\n", ret); 789 return ret; 790 } 791 792 init_completion(&htc->ctl_resp); 793 794 return 0; 795 } 796