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 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 void ath12k_htc_rx_completion_handler(struct ath12k_base *ab, 248 struct sk_buff *skb) 249 { 250 int status = 0; 251 struct ath12k_htc *htc = &ab->htc; 252 struct ath12k_htc_hdr *hdr; 253 struct ath12k_htc_ep *ep; 254 u16 payload_len; 255 u32 trailer_len = 0; 256 size_t min_len; 257 u8 eid; 258 bool trailer_present; 259 260 hdr = (struct ath12k_htc_hdr *)skb->data; 261 skb_pull(skb, sizeof(*hdr)); 262 263 eid = le32_get_bits(hdr->htc_info, HTC_HDR_ENDPOINTID); 264 265 if (eid >= ATH12K_HTC_EP_COUNT) { 266 ath12k_warn(ab, "HTC Rx: invalid eid %d\n", eid); 267 goto out; 268 } 269 270 ep = &htc->endpoint[eid]; 271 272 payload_len = le32_get_bits(hdr->htc_info, HTC_HDR_PAYLOADLEN); 273 274 if (payload_len + sizeof(*hdr) > ATH12K_HTC_MAX_LEN) { 275 ath12k_warn(ab, "HTC rx frame too long, len: %zu\n", 276 payload_len + sizeof(*hdr)); 277 goto out; 278 } 279 280 if (skb->len < payload_len) { 281 ath12k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", 282 skb->len, payload_len); 283 goto out; 284 } 285 286 /* get flags to check for trailer */ 287 trailer_present = le32_get_bits(hdr->htc_info, HTC_HDR_FLAGS) & 288 ATH12K_HTC_FLAG_TRAILER_PRESENT; 289 290 if (trailer_present) { 291 u8 *trailer; 292 293 trailer_len = le32_get_bits(hdr->ctrl_info, 294 HTC_HDR_CONTROLBYTES0); 295 min_len = sizeof(struct ath12k_htc_record_hdr); 296 297 if ((trailer_len < min_len) || 298 (trailer_len > payload_len)) { 299 ath12k_warn(ab, "Invalid trailer length: %d\n", 300 trailer_len); 301 goto out; 302 } 303 304 trailer = (u8 *)hdr; 305 trailer += sizeof(*hdr); 306 trailer += payload_len; 307 trailer -= trailer_len; 308 status = ath12k_htc_process_trailer(htc, trailer, 309 trailer_len, eid); 310 if (status) 311 goto out; 312 313 skb_trim(skb, skb->len - trailer_len); 314 } 315 316 if (trailer_len >= payload_len) 317 /* zero length packet with trailer data, just drop these */ 318 goto out; 319 320 if (eid == ATH12K_HTC_EP_0) { 321 struct ath12k_htc_msg *msg = (struct ath12k_htc_msg *)skb->data; 322 323 switch (le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)) { 324 case ATH12K_HTC_MSG_READY_ID: 325 case ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 326 /* handle HTC control message */ 327 if (completion_done(&htc->ctl_resp)) { 328 /* this is a fatal error, target should not be 329 * sending unsolicited messages on the ep 0 330 */ 331 ath12k_warn(ab, "HTC rx ctrl still processing\n"); 332 complete(&htc->ctl_resp); 333 goto out; 334 } 335 336 htc->control_resp_len = 337 min_t(int, skb->len, 338 ATH12K_HTC_MAX_CTRL_MSG_LEN); 339 340 memcpy(htc->control_resp_buffer, skb->data, 341 htc->control_resp_len); 342 343 complete(&htc->ctl_resp); 344 break; 345 case ATH12K_HTC_MSG_SEND_SUSPEND_COMPLETE: 346 ath12k_htc_suspend_complete(ab, true); 347 break; 348 case ATH12K_HTC_MSG_NACK_SUSPEND: 349 ath12k_htc_suspend_complete(ab, false); 350 break; 351 case ATH12K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID: 352 break; 353 default: 354 ath12k_warn(ab, "ignoring unsolicited htc ep0 event %u\n", 355 le32_get_bits(msg->msg_svc_id, HTC_MSG_MESSAGEID)); 356 break; 357 } 358 goto out; 359 } 360 361 ath12k_dbg(ab, ATH12K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 362 eid, skb); 363 ep->ep_ops.ep_rx_complete(ab, skb); 364 365 /* poll tx completion for interrupt disabled CE's */ 366 ath12k_ce_poll_send_completed(ab, ep->ul_pipe_id); 367 368 /* skb is now owned by the rx completion handler */ 369 skb = NULL; 370 out: 371 kfree_skb(skb); 372 } 373 374 static void ath12k_htc_control_rx_complete(struct ath12k_base *ab, 375 struct sk_buff *skb) 376 { 377 /* This is unexpected. FW is not supposed to send regular rx on this 378 * endpoint. 379 */ 380 ath12k_warn(ab, "unexpected htc rx\n"); 381 kfree_skb(skb); 382 } 383 384 static const char *htc_service_name(enum ath12k_htc_svc_id id) 385 { 386 switch (id) { 387 case ATH12K_HTC_SVC_ID_RESERVED: 388 return "Reserved"; 389 case ATH12K_HTC_SVC_ID_RSVD_CTRL: 390 return "Control"; 391 case ATH12K_HTC_SVC_ID_WMI_CONTROL: 392 return "WMI"; 393 case ATH12K_HTC_SVC_ID_WMI_DATA_BE: 394 return "DATA BE"; 395 case ATH12K_HTC_SVC_ID_WMI_DATA_BK: 396 return "DATA BK"; 397 case ATH12K_HTC_SVC_ID_WMI_DATA_VI: 398 return "DATA VI"; 399 case ATH12K_HTC_SVC_ID_WMI_DATA_VO: 400 return "DATA VO"; 401 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1: 402 return "WMI MAC1"; 403 case ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2: 404 return "WMI MAC2"; 405 case ATH12K_HTC_SVC_ID_NMI_CONTROL: 406 return "NMI Control"; 407 case ATH12K_HTC_SVC_ID_NMI_DATA: 408 return "NMI Data"; 409 case ATH12K_HTC_SVC_ID_HTT_DATA_MSG: 410 return "HTT Data"; 411 case ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS: 412 return "RAW"; 413 case ATH12K_HTC_SVC_ID_IPA_TX: 414 return "IPA TX"; 415 case ATH12K_HTC_SVC_ID_PKT_LOG: 416 return "PKT LOG"; 417 case ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG: 418 return "WMI DIAG"; 419 } 420 421 return "Unknown"; 422 } 423 424 static void ath12k_htc_reset_endpoint_states(struct ath12k_htc *htc) 425 { 426 struct ath12k_htc_ep *ep; 427 int i; 428 429 for (i = ATH12K_HTC_EP_0; i < ATH12K_HTC_EP_COUNT; i++) { 430 ep = &htc->endpoint[i]; 431 ep->service_id = ATH12K_HTC_SVC_ID_UNUSED; 432 ep->max_ep_message_len = 0; 433 ep->max_tx_queue_depth = 0; 434 ep->eid = i; 435 ep->htc = htc; 436 ep->tx_credit_flow_enabled = true; 437 } 438 } 439 440 static u8 ath12k_htc_get_credit_allocation(struct ath12k_htc *htc, 441 u16 service_id) 442 { 443 struct ath12k_htc_svc_tx_credits *serv_entry; 444 u8 i, allocation = 0; 445 446 serv_entry = htc->service_alloc_table; 447 448 for (i = 0; i < ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { 449 if (serv_entry[i].service_id == service_id) { 450 allocation = serv_entry[i].credit_allocation; 451 break; 452 } 453 } 454 455 return allocation; 456 } 457 458 static int ath12k_htc_setup_target_buffer_assignments(struct ath12k_htc *htc) 459 { 460 struct ath12k_htc_svc_tx_credits *serv_entry; 461 static const u32 svc_id[] = { 462 ATH12K_HTC_SVC_ID_WMI_CONTROL, 463 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1, 464 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2, 465 }; 466 int i, credits; 467 468 credits = htc->total_transmit_credits; 469 serv_entry = htc->service_alloc_table; 470 471 if ((htc->wmi_ep_count == 0) || 472 (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) 473 return -EINVAL; 474 475 /* Divide credits among number of endpoints for WMI */ 476 credits = credits / htc->wmi_ep_count; 477 for (i = 0; i < htc->wmi_ep_count; i++) { 478 serv_entry[i].service_id = svc_id[i]; 479 serv_entry[i].credit_allocation = credits; 480 } 481 482 return 0; 483 } 484 485 int ath12k_htc_wait_target(struct ath12k_htc *htc) 486 { 487 int i, status = 0; 488 struct ath12k_base *ab = htc->ab; 489 unsigned long time_left; 490 struct ath12k_htc_ready *ready; 491 u16 message_id; 492 u16 credit_count; 493 u16 credit_size; 494 495 time_left = wait_for_completion_timeout(&htc->ctl_resp, 496 ATH12K_HTC_WAIT_TIMEOUT_HZ); 497 if (!time_left) { 498 ath12k_warn(ab, "failed to receive control response completion, polling..\n"); 499 500 for (i = 0; i < ab->hw_params->ce_count; i++) 501 ath12k_ce_per_engine_service(htc->ab, i); 502 503 time_left = 504 wait_for_completion_timeout(&htc->ctl_resp, 505 ATH12K_HTC_WAIT_TIMEOUT_HZ); 506 507 if (!time_left) 508 status = -ETIMEDOUT; 509 } 510 511 if (status < 0) { 512 ath12k_warn(ab, "ctl_resp never came in (%d)\n", status); 513 return status; 514 } 515 516 if (htc->control_resp_len < sizeof(*ready)) { 517 ath12k_warn(ab, "Invalid HTC ready msg len:%d\n", 518 htc->control_resp_len); 519 return -ECOMM; 520 } 521 522 ready = (struct ath12k_htc_ready *)htc->control_resp_buffer; 523 message_id = le32_get_bits(ready->id_credit_count, HTC_MSG_MESSAGEID); 524 credit_count = le32_get_bits(ready->id_credit_count, 525 HTC_READY_MSG_CREDITCOUNT); 526 credit_size = le32_get_bits(ready->size_ep, HTC_READY_MSG_CREDITSIZE); 527 528 if (message_id != ATH12K_HTC_MSG_READY_ID) { 529 ath12k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); 530 return -ECOMM; 531 } 532 533 htc->total_transmit_credits = credit_count; 534 htc->target_credit_size = credit_size; 535 536 ath12k_dbg(ab, ATH12K_DBG_HTC, 537 "Target ready! transmit resources: %d size:%d\n", 538 htc->total_transmit_credits, htc->target_credit_size); 539 540 if ((htc->total_transmit_credits == 0) || 541 (htc->target_credit_size == 0)) { 542 ath12k_warn(ab, "Invalid credit size received\n"); 543 return -ECOMM; 544 } 545 546 ath12k_htc_setup_target_buffer_assignments(htc); 547 548 return 0; 549 } 550 551 int ath12k_htc_connect_service(struct ath12k_htc *htc, 552 struct ath12k_htc_svc_conn_req *conn_req, 553 struct ath12k_htc_svc_conn_resp *conn_resp) 554 { 555 struct ath12k_base *ab = htc->ab; 556 struct ath12k_htc_conn_svc *req_msg; 557 struct ath12k_htc_conn_svc_resp resp_msg_dummy; 558 struct ath12k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; 559 enum ath12k_htc_ep_id assigned_eid = ATH12K_HTC_EP_COUNT; 560 struct ath12k_htc_ep *ep; 561 struct sk_buff *skb; 562 unsigned int max_msg_size = 0; 563 int length, status; 564 unsigned long time_left; 565 bool disable_credit_flow_ctrl = false; 566 u16 message_id, service_id, flags = 0; 567 u8 tx_alloc = 0; 568 569 /* special case for HTC pseudo control service */ 570 if (conn_req->service_id == ATH12K_HTC_SVC_ID_RSVD_CTRL) { 571 disable_credit_flow_ctrl = true; 572 assigned_eid = ATH12K_HTC_EP_0; 573 max_msg_size = ATH12K_HTC_MAX_CTRL_MSG_LEN; 574 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 575 goto setup; 576 } 577 578 tx_alloc = ath12k_htc_get_credit_allocation(htc, 579 conn_req->service_id); 580 if (!tx_alloc) 581 ath12k_dbg(ab, ATH12K_DBG_BOOT, 582 "boot htc service %s does not allocate target credits\n", 583 htc_service_name(conn_req->service_id)); 584 585 skb = ath12k_htc_build_tx_ctrl_skb(); 586 if (!skb) { 587 ath12k_warn(ab, "Failed to allocate HTC packet\n"); 588 return -ENOMEM; 589 } 590 591 length = sizeof(*req_msg); 592 skb_put(skb, length); 593 memset(skb->data, 0, length); 594 595 req_msg = (struct ath12k_htc_conn_svc *)skb->data; 596 req_msg->msg_svc_id = le32_encode_bits(ATH12K_HTC_MSG_CONNECT_SERVICE_ID, 597 HTC_MSG_MESSAGEID); 598 599 flags |= u32_encode_bits(tx_alloc, ATH12K_HTC_CONN_FLAGS_RECV_ALLOC); 600 601 /* Only enable credit flow control for WMI ctrl service */ 602 if (!(conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL || 603 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 || 604 conn_req->service_id == ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { 605 flags |= ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 606 disable_credit_flow_ctrl = true; 607 } 608 609 req_msg->flags_len = le32_encode_bits(flags, HTC_SVC_MSG_CONNECTIONFLAGS); 610 req_msg->msg_svc_id |= le32_encode_bits(conn_req->service_id, 611 HTC_SVC_MSG_SERVICE_ID); 612 613 reinit_completion(&htc->ctl_resp); 614 615 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 616 if (status) { 617 kfree_skb(skb); 618 return status; 619 } 620 621 /* wait for response */ 622 time_left = wait_for_completion_timeout(&htc->ctl_resp, 623 ATH12K_HTC_CONN_SVC_TIMEOUT_HZ); 624 if (!time_left) { 625 ath12k_err(ab, "Service connect timeout\n"); 626 return -ETIMEDOUT; 627 } 628 629 /* we controlled the buffer creation, it's aligned */ 630 resp_msg = (struct ath12k_htc_conn_svc_resp *)htc->control_resp_buffer; 631 message_id = le32_get_bits(resp_msg->msg_svc_id, HTC_MSG_MESSAGEID); 632 service_id = le32_get_bits(resp_msg->msg_svc_id, 633 HTC_SVC_RESP_MSG_SERVICEID); 634 635 if ((message_id != ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 636 (htc->control_resp_len < sizeof(*resp_msg))) { 637 ath12k_err(ab, "Invalid resp message ID 0x%x", message_id); 638 return -EPROTO; 639 } 640 641 ath12k_dbg(ab, ATH12K_DBG_HTC, 642 "HTC Service %s connect response: status: %u, assigned ep: %u\n", 643 htc_service_name(service_id), 644 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_STATUS), 645 le32_get_bits(resp_msg->flags_len, HTC_SVC_RESP_MSG_ENDPOINTID)); 646 647 conn_resp->connect_resp_code = le32_get_bits(resp_msg->flags_len, 648 HTC_SVC_RESP_MSG_STATUS); 649 650 /* check response status */ 651 if (conn_resp->connect_resp_code != ATH12K_HTC_CONN_SVC_STATUS_SUCCESS) { 652 ath12k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", 653 htc_service_name(service_id), 654 conn_resp->connect_resp_code); 655 return -EPROTO; 656 } 657 658 assigned_eid = le32_get_bits(resp_msg->flags_len, 659 HTC_SVC_RESP_MSG_ENDPOINTID); 660 661 max_msg_size = le32_get_bits(resp_msg->flags_len, 662 HTC_SVC_RESP_MSG_MAXMSGSIZE); 663 664 setup: 665 666 if (assigned_eid >= ATH12K_HTC_EP_COUNT) 667 return -EPROTO; 668 669 if (max_msg_size == 0) 670 return -EPROTO; 671 672 ep = &htc->endpoint[assigned_eid]; 673 ep->eid = assigned_eid; 674 675 if (ep->service_id != ATH12K_HTC_SVC_ID_UNUSED) 676 return -EPROTO; 677 678 /* return assigned endpoint to caller */ 679 conn_resp->eid = assigned_eid; 680 conn_resp->max_msg_len = le32_get_bits(resp_msg->flags_len, 681 HTC_SVC_RESP_MSG_MAXMSGSIZE); 682 683 /* setup the endpoint */ 684 ep->service_id = conn_req->service_id; 685 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 686 ep->max_ep_message_len = le32_get_bits(resp_msg->flags_len, 687 HTC_SVC_RESP_MSG_MAXMSGSIZE); 688 ep->tx_credits = tx_alloc; 689 690 /* copy all the callbacks */ 691 ep->ep_ops = conn_req->ep_ops; 692 693 status = ath12k_hif_map_service_to_pipe(htc->ab, 694 ep->service_id, 695 &ep->ul_pipe_id, 696 &ep->dl_pipe_id); 697 if (status) 698 return status; 699 700 ath12k_dbg(ab, ATH12K_DBG_BOOT, 701 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 702 htc_service_name(ep->service_id), ep->ul_pipe_id, 703 ep->dl_pipe_id, ep->eid); 704 705 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 706 ep->tx_credit_flow_enabled = false; 707 ath12k_dbg(ab, ATH12K_DBG_BOOT, 708 "boot htc service '%s' eid %d TX flow control disabled\n", 709 htc_service_name(ep->service_id), assigned_eid); 710 } 711 712 return status; 713 } 714 715 int ath12k_htc_start(struct ath12k_htc *htc) 716 { 717 struct sk_buff *skb; 718 int status; 719 struct ath12k_base *ab = htc->ab; 720 struct ath12k_htc_setup_complete_extended *msg; 721 722 skb = ath12k_htc_build_tx_ctrl_skb(); 723 if (!skb) 724 return -ENOMEM; 725 726 skb_put(skb, sizeof(*msg)); 727 memset(skb->data, 0, skb->len); 728 729 msg = (struct ath12k_htc_setup_complete_extended *)skb->data; 730 msg->msg_id = le32_encode_bits(ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID, 731 HTC_MSG_MESSAGEID); 732 733 ath12k_dbg(ab, ATH12K_DBG_HTC, "HTC is using TX credit flow control\n"); 734 735 status = ath12k_htc_send(htc, ATH12K_HTC_EP_0, skb); 736 if (status) { 737 kfree_skb(skb); 738 return status; 739 } 740 741 return 0; 742 } 743 744 int ath12k_htc_init(struct ath12k_base *ab) 745 { 746 struct ath12k_htc *htc = &ab->htc; 747 struct ath12k_htc_svc_conn_req conn_req = { }; 748 struct ath12k_htc_svc_conn_resp conn_resp = { }; 749 int ret; 750 751 spin_lock_init(&htc->tx_lock); 752 753 ath12k_htc_reset_endpoint_states(htc); 754 755 htc->ab = ab; 756 757 switch (ab->wmi_ab.preferred_hw_mode) { 758 case WMI_HOST_HW_MODE_SINGLE: 759 htc->wmi_ep_count = 1; 760 break; 761 case WMI_HOST_HW_MODE_DBS: 762 case WMI_HOST_HW_MODE_DBS_OR_SBS: 763 htc->wmi_ep_count = 2; 764 break; 765 case WMI_HOST_HW_MODE_DBS_SBS: 766 htc->wmi_ep_count = 3; 767 break; 768 default: 769 htc->wmi_ep_count = ab->hw_params->max_radios; 770 break; 771 } 772 773 /* setup our pseudo HTC control endpoint connection */ 774 conn_req.ep_ops.ep_tx_complete = ath12k_htc_control_tx_complete; 775 conn_req.ep_ops.ep_rx_complete = ath12k_htc_control_rx_complete; 776 conn_req.max_send_queue_depth = ATH12K_NUM_CONTROL_TX_BUFFERS; 777 conn_req.service_id = ATH12K_HTC_SVC_ID_RSVD_CTRL; 778 779 /* connect fake service */ 780 ret = ath12k_htc_connect_service(htc, &conn_req, &conn_resp); 781 if (ret) { 782 ath12k_err(ab, "could not connect to htc service (%d)\n", ret); 783 return ret; 784 } 785 786 init_completion(&htc->ctl_resp); 787 788 return 0; 789 } 790