htc.c revision 16735d022f72b20ddbb2274b8e109f69575e9b2b
1/* 2 * Copyright (c) 2005-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18#include "core.h" 19#include "hif.h" 20#include "debug.h" 21 22/********/ 23/* Send */ 24/********/ 25 26static inline void ath10k_htc_send_complete_check(struct ath10k_htc_ep *ep, 27 int force) 28{ 29 /* 30 * Check whether HIF has any prior sends that have finished, 31 * have not had the post-processing done. 32 */ 33 ath10k_hif_send_complete_check(ep->htc->ar, ep->ul_pipe_id, force); 34} 35 36static void ath10k_htc_control_tx_complete(struct ath10k *ar, 37 struct sk_buff *skb) 38{ 39 kfree_skb(skb); 40} 41 42static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar) 43{ 44 struct sk_buff *skb; 45 struct ath10k_skb_cb *skb_cb; 46 47 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE); 48 if (!skb) { 49 ath10k_warn("Unable to allocate ctrl skb\n"); 50 return NULL; 51 } 52 53 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */ 54 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb"); 55 56 skb_cb = ATH10K_SKB_CB(skb); 57 memset(skb_cb, 0, sizeof(*skb_cb)); 58 59 ath10k_dbg(ATH10K_DBG_HTC, "%s: skb %p\n", __func__, skb); 60 return skb; 61} 62 63static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc, 64 struct sk_buff *skb) 65{ 66 ath10k_skb_unmap(htc->ar->dev, skb); 67 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 68} 69 70static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, 71 struct sk_buff *skb) 72{ 73 ath10k_dbg(ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__, 74 ep->eid, skb); 75 76 ath10k_htc_restore_tx_skb(ep->htc, skb); 77 78 if (!ep->ep_ops.ep_tx_complete) { 79 ath10k_warn("no tx handler for eid %d\n", ep->eid); 80 dev_kfree_skb_any(skb); 81 return; 82 } 83 84 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb); 85} 86 87/* assumes tx_lock is held */ 88static bool ath10k_htc_ep_need_credit_update(struct ath10k_htc_ep *ep) 89{ 90 if (!ep->tx_credit_flow_enabled) 91 return false; 92 if (ep->tx_credits >= ep->tx_credits_per_max_message) 93 return false; 94 95 ath10k_dbg(ATH10K_DBG_HTC, "HTC: endpoint %d needs credit update\n", 96 ep->eid); 97 return true; 98} 99 100static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep, 101 struct sk_buff *skb) 102{ 103 struct ath10k_htc_hdr *hdr; 104 105 hdr = (struct ath10k_htc_hdr *)skb->data; 106 107 hdr->eid = ep->eid; 108 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); 109 hdr->flags = 0; 110 111 spin_lock_bh(&ep->htc->tx_lock); 112 hdr->seq_no = ep->seq_no++; 113 114 if (ath10k_htc_ep_need_credit_update(ep)) 115 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE; 116 117 spin_unlock_bh(&ep->htc->tx_lock); 118} 119 120int ath10k_htc_send(struct ath10k_htc *htc, 121 enum ath10k_htc_ep_id eid, 122 struct sk_buff *skb) 123{ 124 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 125 int credits = 0; 126 int ret; 127 128 if (htc->ar->state == ATH10K_STATE_WEDGED) 129 return -ECOMM; 130 131 if (eid >= ATH10K_HTC_EP_COUNT) { 132 ath10k_warn("Invalid endpoint id: %d\n", eid); 133 return -ENOENT; 134 } 135 136 /* FIXME: This looks ugly, can we fix it? */ 137 spin_lock_bh(&htc->tx_lock); 138 if (htc->stopped) { 139 spin_unlock_bh(&htc->tx_lock); 140 return -ESHUTDOWN; 141 } 142 spin_unlock_bh(&htc->tx_lock); 143 144 skb_push(skb, sizeof(struct ath10k_htc_hdr)); 145 146 if (ep->tx_credit_flow_enabled) { 147 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 148 spin_lock_bh(&htc->tx_lock); 149 if (ep->tx_credits < credits) { 150 spin_unlock_bh(&htc->tx_lock); 151 ret = -EAGAIN; 152 goto err_pull; 153 } 154 ep->tx_credits -= credits; 155 spin_unlock_bh(&htc->tx_lock); 156 } 157 158 ath10k_htc_prepare_tx_skb(ep, skb); 159 160 ret = ath10k_skb_map(htc->ar->dev, skb); 161 if (ret) 162 goto err_credits; 163 164 ret = ath10k_hif_send_head(htc->ar, ep->ul_pipe_id, ep->eid, 165 skb->len, skb); 166 if (ret) 167 goto err_unmap; 168 169 return 0; 170 171err_unmap: 172 ath10k_skb_unmap(htc->ar->dev, skb); 173err_credits: 174 if (ep->tx_credit_flow_enabled) { 175 spin_lock_bh(&htc->tx_lock); 176 ep->tx_credits += credits; 177 spin_unlock_bh(&htc->tx_lock); 178 179 if (ep->ep_ops.ep_tx_credits) 180 ep->ep_ops.ep_tx_credits(htc->ar); 181 } 182err_pull: 183 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 184 return ret; 185} 186 187static int ath10k_htc_tx_completion_handler(struct ath10k *ar, 188 struct sk_buff *skb, 189 unsigned int eid) 190{ 191 struct ath10k_htc *htc = &ar->htc; 192 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 193 194 ath10k_htc_notify_tx_completion(ep, skb); 195 /* the skb now belongs to the completion handler */ 196 197 return 0; 198} 199 200/***********/ 201/* Receive */ 202/***********/ 203 204static void 205ath10k_htc_process_credit_report(struct ath10k_htc *htc, 206 const struct ath10k_htc_credit_report *report, 207 int len, 208 enum ath10k_htc_ep_id eid) 209{ 210 struct ath10k_htc_ep *ep; 211 int i, n_reports; 212 213 if (len % sizeof(*report)) 214 ath10k_warn("Uneven credit report len %d", len); 215 216 n_reports = len / sizeof(*report); 217 218 spin_lock_bh(&htc->tx_lock); 219 for (i = 0; i < n_reports; i++, report++) { 220 if (report->eid >= ATH10K_HTC_EP_COUNT) 221 break; 222 223 ath10k_dbg(ATH10K_DBG_HTC, "ep %d got %d credits\n", 224 report->eid, report->credits); 225 226 ep = &htc->endpoint[report->eid]; 227 ep->tx_credits += report->credits; 228 229 if (ep->ep_ops.ep_tx_credits) { 230 spin_unlock_bh(&htc->tx_lock); 231 ep->ep_ops.ep_tx_credits(htc->ar); 232 spin_lock_bh(&htc->tx_lock); 233 } 234 } 235 spin_unlock_bh(&htc->tx_lock); 236} 237 238static int ath10k_htc_process_trailer(struct ath10k_htc *htc, 239 u8 *buffer, 240 int length, 241 enum ath10k_htc_ep_id src_eid) 242{ 243 int status = 0; 244 struct ath10k_htc_record *record; 245 u8 *orig_buffer; 246 int orig_length; 247 size_t len; 248 249 orig_buffer = buffer; 250 orig_length = length; 251 252 while (length > 0) { 253 record = (struct ath10k_htc_record *)buffer; 254 255 if (length < sizeof(record->hdr)) { 256 status = -EINVAL; 257 break; 258 } 259 260 if (record->hdr.len > length) { 261 /* no room left in buffer for record */ 262 ath10k_warn("Invalid record length: %d\n", 263 record->hdr.len); 264 status = -EINVAL; 265 break; 266 } 267 268 switch (record->hdr.id) { 269 case ATH10K_HTC_RECORD_CREDITS: 270 len = sizeof(struct ath10k_htc_credit_report); 271 if (record->hdr.len < len) { 272 ath10k_warn("Credit report too long\n"); 273 status = -EINVAL; 274 break; 275 } 276 ath10k_htc_process_credit_report(htc, 277 record->credit_report, 278 record->hdr.len, 279 src_eid); 280 break; 281 default: 282 ath10k_warn("Unhandled record: id:%d length:%d\n", 283 record->hdr.id, record->hdr.len); 284 break; 285 } 286 287 if (status) 288 break; 289 290 /* multiple records may be present in a trailer */ 291 buffer += sizeof(record->hdr) + record->hdr.len; 292 length -= sizeof(record->hdr) + record->hdr.len; 293 } 294 295 if (status) 296 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc rx bad trailer", "", 297 orig_buffer, orig_length); 298 299 return status; 300} 301 302static int ath10k_htc_rx_completion_handler(struct ath10k *ar, 303 struct sk_buff *skb, 304 u8 pipe_id) 305{ 306 int status = 0; 307 struct ath10k_htc *htc = &ar->htc; 308 struct ath10k_htc_hdr *hdr; 309 struct ath10k_htc_ep *ep; 310 u16 payload_len; 311 u32 trailer_len = 0; 312 size_t min_len; 313 u8 eid; 314 bool trailer_present; 315 316 hdr = (struct ath10k_htc_hdr *)skb->data; 317 skb_pull(skb, sizeof(*hdr)); 318 319 eid = hdr->eid; 320 321 if (eid >= ATH10K_HTC_EP_COUNT) { 322 ath10k_warn("HTC Rx: invalid eid %d\n", eid); 323 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad header", "", 324 hdr, sizeof(*hdr)); 325 status = -EINVAL; 326 goto out; 327 } 328 329 ep = &htc->endpoint[eid]; 330 331 /* 332 * If this endpoint that received a message from the target has 333 * a to-target HIF pipe whose send completions are polled rather 334 * than interrupt-driven, this is a good point to ask HIF to check 335 * whether it has any completed sends to handle. 336 */ 337 if (ep->ul_is_polled) 338 ath10k_htc_send_complete_check(ep, 1); 339 340 payload_len = __le16_to_cpu(hdr->len); 341 342 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { 343 ath10k_warn("HTC rx frame too long, len: %zu\n", 344 payload_len + sizeof(*hdr)); 345 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", "", 346 hdr, sizeof(*hdr)); 347 status = -EINVAL; 348 goto out; 349 } 350 351 if (skb->len < payload_len) { 352 ath10k_dbg(ATH10K_DBG_HTC, 353 "HTC Rx: insufficient length, got %d, expected %d\n", 354 skb->len, payload_len); 355 ath10k_dbg_dump(ATH10K_DBG_HTC, "htc bad rx pkt len", 356 "", hdr, sizeof(*hdr)); 357 status = -EINVAL; 358 goto out; 359 } 360 361 /* get flags to check for trailer */ 362 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; 363 if (trailer_present) { 364 u8 *trailer; 365 366 trailer_len = hdr->trailer_len; 367 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); 368 369 if ((trailer_len < min_len) || 370 (trailer_len > payload_len)) { 371 ath10k_warn("Invalid trailer length: %d\n", 372 trailer_len); 373 status = -EPROTO; 374 goto out; 375 } 376 377 trailer = (u8 *)hdr; 378 trailer += sizeof(*hdr); 379 trailer += payload_len; 380 trailer -= trailer_len; 381 status = ath10k_htc_process_trailer(htc, trailer, 382 trailer_len, hdr->eid); 383 if (status) 384 goto out; 385 386 skb_trim(skb, skb->len - trailer_len); 387 } 388 389 if (((int)payload_len - (int)trailer_len) <= 0) 390 /* zero length packet with trailer data, just drop these */ 391 goto out; 392 393 if (eid == ATH10K_HTC_EP_0) { 394 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; 395 396 switch (__le16_to_cpu(msg->hdr.message_id)) { 397 default: 398 /* handle HTC control message */ 399 if (completion_done(&htc->ctl_resp)) { 400 /* 401 * this is a fatal error, target should not be 402 * sending unsolicited messages on the ep 0 403 */ 404 ath10k_warn("HTC rx ctrl still processing\n"); 405 status = -EINVAL; 406 complete(&htc->ctl_resp); 407 goto out; 408 } 409 410 htc->control_resp_len = 411 min_t(int, skb->len, 412 ATH10K_HTC_MAX_CTRL_MSG_LEN); 413 414 memcpy(htc->control_resp_buffer, skb->data, 415 htc->control_resp_len); 416 417 complete(&htc->ctl_resp); 418 break; 419 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: 420 htc->htc_ops.target_send_suspend_complete(ar); 421 } 422 goto out; 423 } 424 425 ath10k_dbg(ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n", 426 eid, skb); 427 ep->ep_ops.ep_rx_complete(ar, skb); 428 429 /* skb is now owned by the rx completion handler */ 430 skb = NULL; 431out: 432 kfree_skb(skb); 433 434 return status; 435} 436 437static void ath10k_htc_control_rx_complete(struct ath10k *ar, 438 struct sk_buff *skb) 439{ 440 /* This is unexpected. FW is not supposed to send regular rx on this 441 * endpoint. */ 442 ath10k_warn("unexpected htc rx\n"); 443 kfree_skb(skb); 444} 445 446/***************/ 447/* Init/Deinit */ 448/***************/ 449 450static const char *htc_service_name(enum ath10k_htc_svc_id id) 451{ 452 switch (id) { 453 case ATH10K_HTC_SVC_ID_RESERVED: 454 return "Reserved"; 455 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 456 return "Control"; 457 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 458 return "WMI"; 459 case ATH10K_HTC_SVC_ID_WMI_DATA_BE: 460 return "DATA BE"; 461 case ATH10K_HTC_SVC_ID_WMI_DATA_BK: 462 return "DATA BK"; 463 case ATH10K_HTC_SVC_ID_WMI_DATA_VI: 464 return "DATA VI"; 465 case ATH10K_HTC_SVC_ID_WMI_DATA_VO: 466 return "DATA VO"; 467 case ATH10K_HTC_SVC_ID_NMI_CONTROL: 468 return "NMI Control"; 469 case ATH10K_HTC_SVC_ID_NMI_DATA: 470 return "NMI Data"; 471 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 472 return "HTT Data"; 473 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: 474 return "RAW"; 475 } 476 477 return "Unknown"; 478} 479 480static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) 481{ 482 struct ath10k_htc_ep *ep; 483 int i; 484 485 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { 486 ep = &htc->endpoint[i]; 487 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; 488 ep->max_ep_message_len = 0; 489 ep->max_tx_queue_depth = 0; 490 ep->eid = i; 491 ep->htc = htc; 492 ep->tx_credit_flow_enabled = true; 493 } 494} 495 496static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) 497{ 498 struct ath10k_htc_svc_tx_credits *entry; 499 500 entry = &htc->service_tx_alloc[0]; 501 502 /* 503 * for PCIE allocate all credists/HTC buffers to WMI. 504 * no buffers are used/required for data. data always 505 * remains on host. 506 */ 507 entry++; 508 entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; 509 entry->credit_allocation = htc->total_transmit_credits; 510} 511 512static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, 513 u16 service_id) 514{ 515 u8 allocation = 0; 516 int i; 517 518 for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { 519 if (htc->service_tx_alloc[i].service_id == service_id) 520 allocation = 521 htc->service_tx_alloc[i].credit_allocation; 522 } 523 524 return allocation; 525} 526 527int ath10k_htc_wait_target(struct ath10k_htc *htc) 528{ 529 int status = 0; 530 struct ath10k_htc_svc_conn_req conn_req; 531 struct ath10k_htc_svc_conn_resp conn_resp; 532 struct ath10k_htc_msg *msg; 533 u16 message_id; 534 u16 credit_count; 535 u16 credit_size; 536 537 reinit_completion(&htc->ctl_resp); 538 539 status = ath10k_hif_start(htc->ar); 540 if (status) { 541 ath10k_err("could not start HIF (%d)\n", status); 542 goto err_start; 543 } 544 545 status = wait_for_completion_timeout(&htc->ctl_resp, 546 ATH10K_HTC_WAIT_TIMEOUT_HZ); 547 if (status <= 0) { 548 if (status == 0) 549 status = -ETIMEDOUT; 550 551 ath10k_err("ctl_resp never came in (%d)\n", status); 552 goto err_target; 553 } 554 555 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { 556 ath10k_err("Invalid HTC ready msg len:%d\n", 557 htc->control_resp_len); 558 559 status = -ECOMM; 560 goto err_target; 561 } 562 563 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 564 message_id = __le16_to_cpu(msg->hdr.message_id); 565 credit_count = __le16_to_cpu(msg->ready.credit_count); 566 credit_size = __le16_to_cpu(msg->ready.credit_size); 567 568 if (message_id != ATH10K_HTC_MSG_READY_ID) { 569 ath10k_err("Invalid HTC ready msg: 0x%x\n", message_id); 570 status = -ECOMM; 571 goto err_target; 572 } 573 574 htc->total_transmit_credits = credit_count; 575 htc->target_credit_size = credit_size; 576 577 ath10k_dbg(ATH10K_DBG_HTC, 578 "Target ready! transmit resources: %d size:%d\n", 579 htc->total_transmit_credits, 580 htc->target_credit_size); 581 582 if ((htc->total_transmit_credits == 0) || 583 (htc->target_credit_size == 0)) { 584 status = -ECOMM; 585 ath10k_err("Invalid credit size received\n"); 586 goto err_target; 587 } 588 589 ath10k_htc_setup_target_buffer_assignments(htc); 590 591 /* setup our pseudo HTC control endpoint connection */ 592 memset(&conn_req, 0, sizeof(conn_req)); 593 memset(&conn_resp, 0, sizeof(conn_resp)); 594 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; 595 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; 596 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; 597 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; 598 599 /* connect fake service */ 600 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); 601 if (status) { 602 ath10k_err("could not connect to htc service (%d)\n", status); 603 goto err_target; 604 } 605 606 return 0; 607err_target: 608 ath10k_hif_stop(htc->ar); 609err_start: 610 return status; 611} 612 613int ath10k_htc_connect_service(struct ath10k_htc *htc, 614 struct ath10k_htc_svc_conn_req *conn_req, 615 struct ath10k_htc_svc_conn_resp *conn_resp) 616{ 617 struct ath10k_htc_msg *msg; 618 struct ath10k_htc_conn_svc *req_msg; 619 struct ath10k_htc_conn_svc_response resp_msg_dummy; 620 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; 621 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; 622 struct ath10k_htc_ep *ep; 623 struct sk_buff *skb; 624 unsigned int max_msg_size = 0; 625 int length, status; 626 bool disable_credit_flow_ctrl = false; 627 u16 message_id, service_id, flags = 0; 628 u8 tx_alloc = 0; 629 630 /* special case for HTC pseudo control service */ 631 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { 632 disable_credit_flow_ctrl = true; 633 assigned_eid = ATH10K_HTC_EP_0; 634 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; 635 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 636 goto setup; 637 } 638 639 tx_alloc = ath10k_htc_get_credit_allocation(htc, 640 conn_req->service_id); 641 if (!tx_alloc) 642 ath10k_dbg(ATH10K_DBG_BOOT, 643 "boot htc service %s does not allocate target credits\n", 644 htc_service_name(conn_req->service_id)); 645 646 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 647 if (!skb) { 648 ath10k_err("Failed to allocate HTC packet\n"); 649 return -ENOMEM; 650 } 651 652 length = sizeof(msg->hdr) + sizeof(msg->connect_service); 653 skb_put(skb, length); 654 memset(skb->data, 0, length); 655 656 msg = (struct ath10k_htc_msg *)skb->data; 657 msg->hdr.message_id = 658 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); 659 660 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); 661 662 /* Only enable credit flow control for WMI ctrl service */ 663 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { 664 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 665 disable_credit_flow_ctrl = true; 666 } 667 668 req_msg = &msg->connect_service; 669 req_msg->flags = __cpu_to_le16(flags); 670 req_msg->service_id = __cpu_to_le16(conn_req->service_id); 671 672 reinit_completion(&htc->ctl_resp); 673 674 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 675 if (status) { 676 kfree_skb(skb); 677 return status; 678 } 679 680 /* wait for response */ 681 status = wait_for_completion_timeout(&htc->ctl_resp, 682 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); 683 if (status <= 0) { 684 if (status == 0) 685 status = -ETIMEDOUT; 686 ath10k_err("Service connect timeout: %d\n", status); 687 return status; 688 } 689 690 /* we controlled the buffer creation, it's aligned */ 691 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 692 resp_msg = &msg->connect_service_response; 693 message_id = __le16_to_cpu(msg->hdr.message_id); 694 service_id = __le16_to_cpu(resp_msg->service_id); 695 696 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 697 (htc->control_resp_len < sizeof(msg->hdr) + 698 sizeof(msg->connect_service_response))) { 699 ath10k_err("Invalid resp message ID 0x%x", message_id); 700 return -EPROTO; 701 } 702 703 ath10k_dbg(ATH10K_DBG_HTC, 704 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", 705 htc_service_name(service_id), 706 resp_msg->status, resp_msg->eid); 707 708 conn_resp->connect_resp_code = resp_msg->status; 709 710 /* check response status */ 711 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { 712 ath10k_err("HTC Service %s connect request failed: 0x%x)\n", 713 htc_service_name(service_id), 714 resp_msg->status); 715 return -EPROTO; 716 } 717 718 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; 719 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); 720 721setup: 722 723 if (assigned_eid >= ATH10K_HTC_EP_COUNT) 724 return -EPROTO; 725 726 if (max_msg_size == 0) 727 return -EPROTO; 728 729 ep = &htc->endpoint[assigned_eid]; 730 ep->eid = assigned_eid; 731 732 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) 733 return -EPROTO; 734 735 /* return assigned endpoint to caller */ 736 conn_resp->eid = assigned_eid; 737 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); 738 739 /* setup the endpoint */ 740 ep->service_id = conn_req->service_id; 741 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 742 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); 743 ep->tx_credits = tx_alloc; 744 ep->tx_credit_size = htc->target_credit_size; 745 ep->tx_credits_per_max_message = ep->max_ep_message_len / 746 htc->target_credit_size; 747 748 if (ep->max_ep_message_len % htc->target_credit_size) 749 ep->tx_credits_per_max_message++; 750 751 /* copy all the callbacks */ 752 ep->ep_ops = conn_req->ep_ops; 753 754 status = ath10k_hif_map_service_to_pipe(htc->ar, 755 ep->service_id, 756 &ep->ul_pipe_id, 757 &ep->dl_pipe_id, 758 &ep->ul_is_polled, 759 &ep->dl_is_polled); 760 if (status) 761 return status; 762 763 ath10k_dbg(ATH10K_DBG_BOOT, 764 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 765 htc_service_name(ep->service_id), ep->ul_pipe_id, 766 ep->dl_pipe_id, ep->eid); 767 768 ath10k_dbg(ATH10K_DBG_BOOT, 769 "boot htc ep %d ul polled %d dl polled %d\n", 770 ep->eid, ep->ul_is_polled, ep->dl_is_polled); 771 772 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 773 ep->tx_credit_flow_enabled = false; 774 ath10k_dbg(ATH10K_DBG_BOOT, 775 "boot htc service '%s' eid %d TX flow control disabled\n", 776 htc_service_name(ep->service_id), assigned_eid); 777 } 778 779 return status; 780} 781 782struct sk_buff *ath10k_htc_alloc_skb(int size) 783{ 784 struct sk_buff *skb; 785 786 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); 787 if (!skb) { 788 ath10k_warn("could not allocate HTC tx skb\n"); 789 return NULL; 790 } 791 792 skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); 793 794 /* FW/HTC requires 4-byte aligned streams */ 795 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 796 ath10k_warn("Unaligned HTC tx skb\n"); 797 798 return skb; 799} 800 801int ath10k_htc_start(struct ath10k_htc *htc) 802{ 803 struct sk_buff *skb; 804 int status = 0; 805 struct ath10k_htc_msg *msg; 806 807 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 808 if (!skb) 809 return -ENOMEM; 810 811 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); 812 memset(skb->data, 0, skb->len); 813 814 msg = (struct ath10k_htc_msg *)skb->data; 815 msg->hdr.message_id = 816 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); 817 818 ath10k_dbg(ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); 819 820 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 821 if (status) { 822 kfree_skb(skb); 823 return status; 824 } 825 826 return 0; 827} 828 829/* 830 * stop HTC communications, i.e. stop interrupt reception, and flush all 831 * queued buffers 832 */ 833void ath10k_htc_stop(struct ath10k_htc *htc) 834{ 835 spin_lock_bh(&htc->tx_lock); 836 htc->stopped = true; 837 spin_unlock_bh(&htc->tx_lock); 838 839 ath10k_hif_stop(htc->ar); 840} 841 842/* registered target arrival callback from the HIF layer */ 843int ath10k_htc_init(struct ath10k *ar) 844{ 845 struct ath10k_hif_cb htc_callbacks; 846 struct ath10k_htc_ep *ep = NULL; 847 struct ath10k_htc *htc = &ar->htc; 848 849 spin_lock_init(&htc->tx_lock); 850 851 htc->stopped = false; 852 ath10k_htc_reset_endpoint_states(htc); 853 854 /* setup HIF layer callbacks */ 855 htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler; 856 htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler; 857 htc->ar = ar; 858 859 /* Get HIF default pipe for HTC message exchange */ 860 ep = &htc->endpoint[ATH10K_HTC_EP_0]; 861 862 ath10k_hif_set_callbacks(ar, &htc_callbacks); 863 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); 864 865 init_completion(&htc->ctl_resp); 866 867 return 0; 868} 869