1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (c) 2005-2011 Atheros Communications Inc. 4 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc. 5 */ 6 7 #include "core.h" 8 #include "hif.h" 9 #include "debug.h" 10 11 /********/ 12 /* Send */ 13 /********/ 14 15 static void ath10k_htc_control_tx_complete(struct ath10k *ar, 16 struct sk_buff *skb) 17 { 18 kfree_skb(skb); 19 } 20 21 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar) 22 { 23 struct sk_buff *skb; 24 struct ath10k_skb_cb *skb_cb; 25 26 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE); 27 if (!skb) 28 return NULL; 29 30 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */ 31 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb"); 32 33 skb_cb = ATH10K_SKB_CB(skb); 34 memset(skb_cb, 0, sizeof(*skb_cb)); 35 36 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb); 37 return skb; 38 } 39 40 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc, 41 struct sk_buff *skb) 42 { 43 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 44 45 if (htc->ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) 46 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 47 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 48 } 49 50 void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, 51 struct sk_buff *skb) 52 { 53 struct ath10k *ar = ep->htc->ar; 54 55 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__, 56 ep->eid, skb); 57 58 ath10k_htc_restore_tx_skb(ep->htc, skb); 59 60 if (!ep->ep_ops.ep_tx_complete) { 61 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid); 62 dev_kfree_skb_any(skb); 63 return; 64 } 65 66 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb); 67 } 68 EXPORT_SYMBOL(ath10k_htc_notify_tx_completion); 69 70 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep, 71 struct sk_buff *skb) 72 { 73 struct ath10k_htc_hdr *hdr; 74 75 hdr = (struct ath10k_htc_hdr *)skb->data; 76 memset(hdr, 0, sizeof(struct ath10k_htc_hdr)); 77 78 hdr->eid = ep->eid; 79 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); 80 hdr->flags = 0; 81 if (ep->tx_credit_flow_enabled) 82 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE; 83 84 spin_lock_bh(&ep->htc->tx_lock); 85 hdr->seq_no = ep->seq_no++; 86 spin_unlock_bh(&ep->htc->tx_lock); 87 } 88 89 int ath10k_htc_send(struct ath10k_htc *htc, 90 enum ath10k_htc_ep_id eid, 91 struct sk_buff *skb) 92 { 93 struct ath10k *ar = htc->ar; 94 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 95 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 96 struct ath10k_hif_sg_item sg_item; 97 struct device *dev = htc->ar->dev; 98 int credits = 0; 99 int ret; 100 101 if (htc->ar->state == ATH10K_STATE_WEDGED) 102 return -ECOMM; 103 104 if (eid >= ATH10K_HTC_EP_COUNT) { 105 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid); 106 return -ENOENT; 107 } 108 109 skb_push(skb, sizeof(struct ath10k_htc_hdr)); 110 111 if (ep->tx_credit_flow_enabled) { 112 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 113 spin_lock_bh(&htc->tx_lock); 114 if (ep->tx_credits < credits) { 115 ath10k_dbg(ar, ATH10K_DBG_HTC, 116 "htc insufficient credits ep %d required %d available %d\n", 117 eid, credits, ep->tx_credits); 118 spin_unlock_bh(&htc->tx_lock); 119 ret = -EAGAIN; 120 goto err_pull; 121 } 122 ep->tx_credits -= credits; 123 ath10k_dbg(ar, ATH10K_DBG_HTC, 124 "htc ep %d consumed %d credits (total %d)\n", 125 eid, credits, ep->tx_credits); 126 spin_unlock_bh(&htc->tx_lock); 127 } 128 129 ath10k_htc_prepare_tx_skb(ep, skb); 130 131 skb_cb->eid = eid; 132 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) { 133 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, 134 DMA_TO_DEVICE); 135 ret = dma_mapping_error(dev, skb_cb->paddr); 136 if (ret) { 137 ret = -EIO; 138 goto err_credits; 139 } 140 } 141 142 sg_item.transfer_id = ep->eid; 143 sg_item.transfer_context = skb; 144 sg_item.vaddr = skb->data; 145 sg_item.paddr = skb_cb->paddr; 146 sg_item.len = skb->len; 147 148 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1); 149 if (ret) 150 goto err_unmap; 151 152 return 0; 153 154 err_unmap: 155 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) 156 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 157 err_credits: 158 if (ep->tx_credit_flow_enabled) { 159 spin_lock_bh(&htc->tx_lock); 160 ep->tx_credits += credits; 161 ath10k_dbg(ar, ATH10K_DBG_HTC, 162 "htc ep %d reverted %d credits back (total %d)\n", 163 eid, credits, ep->tx_credits); 164 spin_unlock_bh(&htc->tx_lock); 165 166 if (ep->ep_ops.ep_tx_credits) 167 ep->ep_ops.ep_tx_credits(htc->ar); 168 } 169 err_pull: 170 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 171 return ret; 172 } 173 174 void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb) 175 { 176 struct ath10k_htc *htc = &ar->htc; 177 struct ath10k_skb_cb *skb_cb; 178 struct ath10k_htc_ep *ep; 179 180 if (WARN_ON_ONCE(!skb)) 181 return; 182 183 skb_cb = ATH10K_SKB_CB(skb); 184 ep = &htc->endpoint[skb_cb->eid]; 185 186 ath10k_htc_notify_tx_completion(ep, skb); 187 /* the skb now belongs to the completion handler */ 188 } 189 EXPORT_SYMBOL(ath10k_htc_tx_completion_handler); 190 191 /***********/ 192 /* Receive */ 193 /***********/ 194 195 static void 196 ath10k_htc_process_credit_report(struct ath10k_htc *htc, 197 const struct ath10k_htc_credit_report *report, 198 int len, 199 enum ath10k_htc_ep_id eid) 200 { 201 struct ath10k *ar = htc->ar; 202 struct ath10k_htc_ep *ep; 203 int i, n_reports; 204 205 if (len % sizeof(*report)) 206 ath10k_warn(ar, "Uneven credit report len %d", len); 207 208 n_reports = len / sizeof(*report); 209 210 spin_lock_bh(&htc->tx_lock); 211 for (i = 0; i < n_reports; i++, report++) { 212 if (report->eid >= ATH10K_HTC_EP_COUNT) 213 break; 214 215 ep = &htc->endpoint[report->eid]; 216 ep->tx_credits += report->credits; 217 218 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 219 report->eid, report->credits, ep->tx_credits); 220 221 if (ep->ep_ops.ep_tx_credits) { 222 spin_unlock_bh(&htc->tx_lock); 223 ep->ep_ops.ep_tx_credits(htc->ar); 224 spin_lock_bh(&htc->tx_lock); 225 } 226 } 227 spin_unlock_bh(&htc->tx_lock); 228 } 229 230 static int 231 ath10k_htc_process_lookahead(struct ath10k_htc *htc, 232 const struct ath10k_htc_lookahead_report *report, 233 int len, 234 enum ath10k_htc_ep_id eid, 235 void *next_lookaheads, 236 int *next_lookaheads_len) 237 { 238 struct ath10k *ar = htc->ar; 239 240 /* Invalid lookahead flags are actually transmitted by 241 * the target in the HTC control message. 242 * Since this will happen at every boot we silently ignore 243 * the lookahead in this case 244 */ 245 if (report->pre_valid != ((~report->post_valid) & 0xFF)) 246 return 0; 247 248 if (next_lookaheads && next_lookaheads_len) { 249 ath10k_dbg(ar, ATH10K_DBG_HTC, 250 "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n", 251 report->pre_valid, report->post_valid); 252 253 /* look ahead bytes are valid, copy them over */ 254 memcpy((u8 *)next_lookaheads, report->lookahead, 4); 255 256 *next_lookaheads_len = 1; 257 } 258 259 return 0; 260 } 261 262 static int 263 ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc, 264 const struct ath10k_htc_lookahead_bundle *report, 265 int len, 266 enum ath10k_htc_ep_id eid, 267 void *next_lookaheads, 268 int *next_lookaheads_len) 269 { 270 struct ath10k *ar = htc->ar; 271 int bundle_cnt = len / sizeof(*report); 272 273 if (!bundle_cnt || (bundle_cnt > htc->max_msgs_per_htc_bundle)) { 274 ath10k_warn(ar, "Invalid lookahead bundle count: %d\n", 275 bundle_cnt); 276 return -EINVAL; 277 } 278 279 if (next_lookaheads && next_lookaheads_len) { 280 int i; 281 282 for (i = 0; i < bundle_cnt; i++) { 283 memcpy(((u8 *)next_lookaheads) + 4 * i, 284 report->lookahead, 4); 285 report++; 286 } 287 288 *next_lookaheads_len = bundle_cnt; 289 } 290 291 return 0; 292 } 293 294 int ath10k_htc_process_trailer(struct ath10k_htc *htc, 295 u8 *buffer, 296 int length, 297 enum ath10k_htc_ep_id src_eid, 298 void *next_lookaheads, 299 int *next_lookaheads_len) 300 { 301 struct ath10k_htc_lookahead_bundle *bundle; 302 struct ath10k *ar = htc->ar; 303 int status = 0; 304 struct ath10k_htc_record *record; 305 u8 *orig_buffer; 306 int orig_length; 307 size_t len; 308 309 orig_buffer = buffer; 310 orig_length = length; 311 312 while (length > 0) { 313 record = (struct ath10k_htc_record *)buffer; 314 315 if (length < sizeof(record->hdr)) { 316 status = -EINVAL; 317 break; 318 } 319 320 if (record->hdr.len > length) { 321 /* no room left in buffer for record */ 322 ath10k_warn(ar, "Invalid record length: %d\n", 323 record->hdr.len); 324 status = -EINVAL; 325 break; 326 } 327 328 switch (record->hdr.id) { 329 case ATH10K_HTC_RECORD_CREDITS: 330 len = sizeof(struct ath10k_htc_credit_report); 331 if (record->hdr.len < len) { 332 ath10k_warn(ar, "Credit report too long\n"); 333 status = -EINVAL; 334 break; 335 } 336 ath10k_htc_process_credit_report(htc, 337 record->credit_report, 338 record->hdr.len, 339 src_eid); 340 break; 341 case ATH10K_HTC_RECORD_LOOKAHEAD: 342 len = sizeof(struct ath10k_htc_lookahead_report); 343 if (record->hdr.len < len) { 344 ath10k_warn(ar, "Lookahead report too long\n"); 345 status = -EINVAL; 346 break; 347 } 348 status = ath10k_htc_process_lookahead(htc, 349 record->lookahead_report, 350 record->hdr.len, 351 src_eid, 352 next_lookaheads, 353 next_lookaheads_len); 354 break; 355 case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE: 356 bundle = record->lookahead_bundle; 357 status = ath10k_htc_process_lookahead_bundle(htc, 358 bundle, 359 record->hdr.len, 360 src_eid, 361 next_lookaheads, 362 next_lookaheads_len); 363 break; 364 default: 365 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", 366 record->hdr.id, record->hdr.len); 367 break; 368 } 369 370 if (status) 371 break; 372 373 /* multiple records may be present in a trailer */ 374 buffer += sizeof(record->hdr) + record->hdr.len; 375 length -= sizeof(record->hdr) + record->hdr.len; 376 } 377 378 if (status) 379 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "", 380 orig_buffer, orig_length); 381 382 return status; 383 } 384 EXPORT_SYMBOL(ath10k_htc_process_trailer); 385 386 void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) 387 { 388 int status = 0; 389 struct ath10k_htc *htc = &ar->htc; 390 struct ath10k_htc_hdr *hdr; 391 struct ath10k_htc_ep *ep; 392 u16 payload_len; 393 u32 trailer_len = 0; 394 size_t min_len; 395 u8 eid; 396 bool trailer_present; 397 398 hdr = (struct ath10k_htc_hdr *)skb->data; 399 skb_pull(skb, sizeof(*hdr)); 400 401 eid = hdr->eid; 402 403 if (eid >= ATH10K_HTC_EP_COUNT) { 404 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid); 405 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "", 406 hdr, sizeof(*hdr)); 407 goto out; 408 } 409 410 ep = &htc->endpoint[eid]; 411 412 payload_len = __le16_to_cpu(hdr->len); 413 414 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { 415 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n", 416 payload_len + sizeof(*hdr)); 417 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "", 418 hdr, sizeof(*hdr)); 419 goto out; 420 } 421 422 if (skb->len < payload_len) { 423 ath10k_dbg(ar, ATH10K_DBG_HTC, 424 "HTC Rx: insufficient length, got %d, expected %d\n", 425 skb->len, payload_len); 426 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", 427 "", hdr, sizeof(*hdr)); 428 goto out; 429 } 430 431 /* get flags to check for trailer */ 432 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; 433 if (trailer_present) { 434 u8 *trailer; 435 436 trailer_len = hdr->trailer_len; 437 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); 438 439 if ((trailer_len < min_len) || 440 (trailer_len > payload_len)) { 441 ath10k_warn(ar, "Invalid trailer length: %d\n", 442 trailer_len); 443 goto out; 444 } 445 446 trailer = (u8 *)hdr; 447 trailer += sizeof(*hdr); 448 trailer += payload_len; 449 trailer -= trailer_len; 450 status = ath10k_htc_process_trailer(htc, trailer, 451 trailer_len, hdr->eid, 452 NULL, NULL); 453 if (status) 454 goto out; 455 456 skb_trim(skb, skb->len - trailer_len); 457 } 458 459 if (((int)payload_len - (int)trailer_len) <= 0) 460 /* zero length packet with trailer data, just drop these */ 461 goto out; 462 463 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 464 eid, skb); 465 ep->ep_ops.ep_rx_complete(ar, skb); 466 467 /* skb is now owned by the rx completion handler */ 468 skb = NULL; 469 out: 470 kfree_skb(skb); 471 } 472 EXPORT_SYMBOL(ath10k_htc_rx_completion_handler); 473 474 static void ath10k_htc_control_rx_complete(struct ath10k *ar, 475 struct sk_buff *skb) 476 { 477 struct ath10k_htc *htc = &ar->htc; 478 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; 479 480 switch (__le16_to_cpu(msg->hdr.message_id)) { 481 case ATH10K_HTC_MSG_READY_ID: 482 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 483 /* handle HTC control message */ 484 if (completion_done(&htc->ctl_resp)) { 485 /* this is a fatal error, target should not be 486 * sending unsolicited messages on the ep 0 487 */ 488 ath10k_warn(ar, "HTC rx ctrl still processing\n"); 489 complete(&htc->ctl_resp); 490 goto out; 491 } 492 493 htc->control_resp_len = 494 min_t(int, skb->len, 495 ATH10K_HTC_MAX_CTRL_MSG_LEN); 496 497 memcpy(htc->control_resp_buffer, skb->data, 498 htc->control_resp_len); 499 500 complete(&htc->ctl_resp); 501 break; 502 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: 503 htc->htc_ops.target_send_suspend_complete(ar); 504 break; 505 default: 506 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n"); 507 break; 508 } 509 510 out: 511 kfree_skb(skb); 512 } 513 514 /***************/ 515 /* Init/Deinit */ 516 /***************/ 517 518 static const char *htc_service_name(enum ath10k_htc_svc_id id) 519 { 520 switch (id) { 521 case ATH10K_HTC_SVC_ID_RESERVED: 522 return "Reserved"; 523 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 524 return "Control"; 525 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 526 return "WMI"; 527 case ATH10K_HTC_SVC_ID_WMI_DATA_BE: 528 return "DATA BE"; 529 case ATH10K_HTC_SVC_ID_WMI_DATA_BK: 530 return "DATA BK"; 531 case ATH10K_HTC_SVC_ID_WMI_DATA_VI: 532 return "DATA VI"; 533 case ATH10K_HTC_SVC_ID_WMI_DATA_VO: 534 return "DATA VO"; 535 case ATH10K_HTC_SVC_ID_NMI_CONTROL: 536 return "NMI Control"; 537 case ATH10K_HTC_SVC_ID_NMI_DATA: 538 return "NMI Data"; 539 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 540 return "HTT Data"; 541 case ATH10K_HTC_SVC_ID_HTT_DATA2_MSG: 542 return "HTT Data"; 543 case ATH10K_HTC_SVC_ID_HTT_DATA3_MSG: 544 return "HTT Data"; 545 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: 546 return "RAW"; 547 case ATH10K_HTC_SVC_ID_HTT_LOG_MSG: 548 return "PKTLOG"; 549 } 550 551 return "Unknown"; 552 } 553 554 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) 555 { 556 struct ath10k_htc_ep *ep; 557 int i; 558 559 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { 560 ep = &htc->endpoint[i]; 561 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; 562 ep->max_ep_message_len = 0; 563 ep->max_tx_queue_depth = 0; 564 ep->eid = i; 565 ep->htc = htc; 566 ep->tx_credit_flow_enabled = true; 567 } 568 } 569 570 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, 571 u16 service_id) 572 { 573 u8 allocation = 0; 574 575 /* The WMI control service is the only service with flow control. 576 * Let it have all transmit credits. 577 */ 578 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL) 579 allocation = htc->total_transmit_credits; 580 581 return allocation; 582 } 583 584 int ath10k_htc_wait_target(struct ath10k_htc *htc) 585 { 586 struct ath10k *ar = htc->ar; 587 int i, status = 0; 588 unsigned long time_left; 589 struct ath10k_htc_msg *msg; 590 u16 message_id; 591 592 time_left = wait_for_completion_timeout(&htc->ctl_resp, 593 ATH10K_HTC_WAIT_TIMEOUT_HZ); 594 if (!time_left) { 595 /* Workaround: In some cases the PCI HIF doesn't 596 * receive interrupt for the control response message 597 * even if the buffer was completed. It is suspected 598 * iomap writes unmasking PCI CE irqs aren't propagated 599 * properly in KVM PCI-passthrough sometimes. 600 */ 601 ath10k_warn(ar, "failed to receive control response completion, polling..\n"); 602 603 for (i = 0; i < CE_COUNT; i++) 604 ath10k_hif_send_complete_check(htc->ar, i, 1); 605 606 time_left = 607 wait_for_completion_timeout(&htc->ctl_resp, 608 ATH10K_HTC_WAIT_TIMEOUT_HZ); 609 610 if (!time_left) 611 status = -ETIMEDOUT; 612 } 613 614 if (status < 0) { 615 ath10k_err(ar, "ctl_resp never came in (%d)\n", status); 616 return status; 617 } 618 619 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { 620 ath10k_err(ar, "Invalid HTC ready msg len:%d\n", 621 htc->control_resp_len); 622 return -ECOMM; 623 } 624 625 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 626 message_id = __le16_to_cpu(msg->hdr.message_id); 627 628 if (message_id != ATH10K_HTC_MSG_READY_ID) { 629 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id); 630 return -ECOMM; 631 } 632 633 htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count); 634 htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size); 635 636 ath10k_dbg(ar, ATH10K_DBG_HTC, 637 "Target ready! transmit resources: %d size:%d\n", 638 htc->total_transmit_credits, 639 htc->target_credit_size); 640 641 if ((htc->total_transmit_credits == 0) || 642 (htc->target_credit_size == 0)) { 643 ath10k_err(ar, "Invalid credit size received\n"); 644 return -ECOMM; 645 } 646 647 /* The only way to determine if the ready message is an extended 648 * message is from the size. 649 */ 650 if (htc->control_resp_len >= 651 sizeof(msg->hdr) + sizeof(msg->ready_ext)) { 652 htc->max_msgs_per_htc_bundle = 653 min_t(u8, msg->ready_ext.max_msgs_per_htc_bundle, 654 HTC_HOST_MAX_MSG_PER_RX_BUNDLE); 655 ath10k_dbg(ar, ATH10K_DBG_HTC, 656 "Extended ready message. RX bundle size: %d\n", 657 htc->max_msgs_per_htc_bundle); 658 } 659 660 return 0; 661 } 662 663 int ath10k_htc_connect_service(struct ath10k_htc *htc, 664 struct ath10k_htc_svc_conn_req *conn_req, 665 struct ath10k_htc_svc_conn_resp *conn_resp) 666 { 667 struct ath10k *ar = htc->ar; 668 struct ath10k_htc_msg *msg; 669 struct ath10k_htc_conn_svc *req_msg; 670 struct ath10k_htc_conn_svc_response resp_msg_dummy; 671 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; 672 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; 673 struct ath10k_htc_ep *ep; 674 struct sk_buff *skb; 675 unsigned int max_msg_size = 0; 676 int length, status; 677 unsigned long time_left; 678 bool disable_credit_flow_ctrl = false; 679 u16 message_id, service_id, flags = 0; 680 u8 tx_alloc = 0; 681 682 /* special case for HTC pseudo control service */ 683 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { 684 disable_credit_flow_ctrl = true; 685 assigned_eid = ATH10K_HTC_EP_0; 686 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; 687 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 688 goto setup; 689 } 690 691 tx_alloc = ath10k_htc_get_credit_allocation(htc, 692 conn_req->service_id); 693 if (!tx_alloc) 694 ath10k_dbg(ar, ATH10K_DBG_BOOT, 695 "boot htc service %s does not allocate target credits\n", 696 htc_service_name(conn_req->service_id)); 697 698 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 699 if (!skb) { 700 ath10k_err(ar, "Failed to allocate HTC packet\n"); 701 return -ENOMEM; 702 } 703 704 length = sizeof(msg->hdr) + sizeof(msg->connect_service); 705 skb_put(skb, length); 706 memset(skb->data, 0, length); 707 708 msg = (struct ath10k_htc_msg *)skb->data; 709 msg->hdr.message_id = 710 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); 711 712 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); 713 714 /* Only enable credit flow control for WMI ctrl service */ 715 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { 716 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 717 disable_credit_flow_ctrl = true; 718 } 719 720 req_msg = &msg->connect_service; 721 req_msg->flags = __cpu_to_le16(flags); 722 req_msg->service_id = __cpu_to_le16(conn_req->service_id); 723 724 reinit_completion(&htc->ctl_resp); 725 726 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 727 if (status) { 728 kfree_skb(skb); 729 return status; 730 } 731 732 /* wait for response */ 733 time_left = wait_for_completion_timeout(&htc->ctl_resp, 734 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); 735 if (!time_left) { 736 ath10k_err(ar, "Service connect timeout\n"); 737 return -ETIMEDOUT; 738 } 739 740 /* we controlled the buffer creation, it's aligned */ 741 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 742 resp_msg = &msg->connect_service_response; 743 message_id = __le16_to_cpu(msg->hdr.message_id); 744 service_id = __le16_to_cpu(resp_msg->service_id); 745 746 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 747 (htc->control_resp_len < sizeof(msg->hdr) + 748 sizeof(msg->connect_service_response))) { 749 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id); 750 return -EPROTO; 751 } 752 753 ath10k_dbg(ar, ATH10K_DBG_HTC, 754 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", 755 htc_service_name(service_id), 756 resp_msg->status, resp_msg->eid); 757 758 conn_resp->connect_resp_code = resp_msg->status; 759 760 /* check response status */ 761 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { 762 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n", 763 htc_service_name(service_id), 764 resp_msg->status); 765 return -EPROTO; 766 } 767 768 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; 769 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); 770 771 setup: 772 773 if (assigned_eid >= ATH10K_HTC_EP_COUNT) 774 return -EPROTO; 775 776 if (max_msg_size == 0) 777 return -EPROTO; 778 779 ep = &htc->endpoint[assigned_eid]; 780 ep->eid = assigned_eid; 781 782 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) 783 return -EPROTO; 784 785 /* return assigned endpoint to caller */ 786 conn_resp->eid = assigned_eid; 787 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); 788 789 /* setup the endpoint */ 790 ep->service_id = conn_req->service_id; 791 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 792 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); 793 ep->tx_credits = tx_alloc; 794 795 /* copy all the callbacks */ 796 ep->ep_ops = conn_req->ep_ops; 797 798 status = ath10k_hif_map_service_to_pipe(htc->ar, 799 ep->service_id, 800 &ep->ul_pipe_id, 801 &ep->dl_pipe_id); 802 if (status) { 803 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC service id: %d\n", 804 ep->service_id); 805 return status; 806 } 807 808 ath10k_dbg(ar, ATH10K_DBG_BOOT, 809 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 810 htc_service_name(ep->service_id), ep->ul_pipe_id, 811 ep->dl_pipe_id, ep->eid); 812 813 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 814 ep->tx_credit_flow_enabled = false; 815 ath10k_dbg(ar, ATH10K_DBG_BOOT, 816 "boot htc service '%s' eid %d TX flow control disabled\n", 817 htc_service_name(ep->service_id), assigned_eid); 818 } 819 820 return status; 821 } 822 823 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size) 824 { 825 struct sk_buff *skb; 826 827 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); 828 if (!skb) 829 return NULL; 830 831 skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); 832 833 /* FW/HTC requires 4-byte aligned streams */ 834 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 835 ath10k_warn(ar, "Unaligned HTC tx skb\n"); 836 837 return skb; 838 } 839 840 static void ath10k_htc_pktlog_process_rx(struct ath10k *ar, struct sk_buff *skb) 841 { 842 trace_ath10k_htt_pktlog(ar, skb->data, skb->len); 843 dev_kfree_skb_any(skb); 844 } 845 846 static int ath10k_htc_pktlog_connect(struct ath10k *ar) 847 { 848 struct ath10k_htc_svc_conn_resp conn_resp; 849 struct ath10k_htc_svc_conn_req conn_req; 850 int status; 851 852 memset(&conn_req, 0, sizeof(conn_req)); 853 memset(&conn_resp, 0, sizeof(conn_resp)); 854 855 conn_req.ep_ops.ep_tx_complete = NULL; 856 conn_req.ep_ops.ep_rx_complete = ath10k_htc_pktlog_process_rx; 857 conn_req.ep_ops.ep_tx_credits = NULL; 858 859 /* connect to control service */ 860 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_LOG_MSG; 861 status = ath10k_htc_connect_service(&ar->htc, &conn_req, &conn_resp); 862 if (status) { 863 ath10k_warn(ar, "failed to connect to PKTLOG service: %d\n", 864 status); 865 return status; 866 } 867 868 return 0; 869 } 870 871 static bool ath10k_htc_pktlog_svc_supported(struct ath10k *ar) 872 { 873 u8 ul_pipe_id; 874 u8 dl_pipe_id; 875 int status; 876 877 status = ath10k_hif_map_service_to_pipe(ar, ATH10K_HTC_SVC_ID_HTT_LOG_MSG, 878 &ul_pipe_id, 879 &dl_pipe_id); 880 if (status) { 881 ath10k_dbg(ar, ATH10K_DBG_BOOT, "unsupported HTC pktlog service id: %d\n", 882 ATH10K_HTC_SVC_ID_HTT_LOG_MSG); 883 884 return false; 885 } 886 887 return true; 888 } 889 890 int ath10k_htc_start(struct ath10k_htc *htc) 891 { 892 struct ath10k *ar = htc->ar; 893 struct sk_buff *skb; 894 int status = 0; 895 struct ath10k_htc_msg *msg; 896 897 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 898 if (!skb) 899 return -ENOMEM; 900 901 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); 902 memset(skb->data, 0, skb->len); 903 904 msg = (struct ath10k_htc_msg *)skb->data; 905 msg->hdr.message_id = 906 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); 907 908 if (ar->hif.bus == ATH10K_BUS_SDIO) { 909 /* Extra setup params used by SDIO */ 910 msg->setup_complete_ext.flags = 911 __cpu_to_le32(ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN); 912 msg->setup_complete_ext.max_msgs_per_bundled_recv = 913 htc->max_msgs_per_htc_bundle; 914 } 915 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); 916 917 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 918 if (status) { 919 kfree_skb(skb); 920 return status; 921 } 922 923 if (ath10k_htc_pktlog_svc_supported(ar)) { 924 status = ath10k_htc_pktlog_connect(ar); 925 if (status) { 926 ath10k_err(ar, "failed to connect to pktlog: %d\n", status); 927 return status; 928 } 929 } 930 931 return 0; 932 } 933 934 /* registered target arrival callback from the HIF layer */ 935 int ath10k_htc_init(struct ath10k *ar) 936 { 937 int status; 938 struct ath10k_htc *htc = &ar->htc; 939 struct ath10k_htc_svc_conn_req conn_req; 940 struct ath10k_htc_svc_conn_resp conn_resp; 941 942 spin_lock_init(&htc->tx_lock); 943 944 ath10k_htc_reset_endpoint_states(htc); 945 946 htc->ar = ar; 947 948 /* setup our pseudo HTC control endpoint connection */ 949 memset(&conn_req, 0, sizeof(conn_req)); 950 memset(&conn_resp, 0, sizeof(conn_resp)); 951 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; 952 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; 953 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; 954 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; 955 956 /* connect fake service */ 957 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); 958 if (status) { 959 ath10k_err(ar, "could not connect to htc service (%d)\n", 960 status); 961 return status; 962 } 963 964 init_completion(&htc->ctl_resp); 965 966 return 0; 967 } 968