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 26 static 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 36 static void ath10k_htc_control_tx_complete(struct ath10k *ar, 37 struct sk_buff *skb) 38 { 39 kfree_skb(skb); 40 } 41 42 static 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 return NULL; 50 51 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */ 52 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb"); 53 54 skb_cb = ATH10K_SKB_CB(skb); 55 memset(skb_cb, 0, sizeof(*skb_cb)); 56 57 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %p\n", __func__, skb); 58 return skb; 59 } 60 61 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc, 62 struct sk_buff *skb) 63 { 64 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 65 66 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 67 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 68 } 69 70 static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, 71 struct sk_buff *skb) 72 { 73 struct ath10k *ar = ep->htc->ar; 74 75 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %p\n", __func__, 76 ep->eid, skb); 77 78 ath10k_htc_restore_tx_skb(ep->htc, skb); 79 80 if (!ep->ep_ops.ep_tx_complete) { 81 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid); 82 dev_kfree_skb_any(skb); 83 return; 84 } 85 86 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb); 87 } 88 89 /* assumes tx_lock is held */ 90 static bool ath10k_htc_ep_need_credit_update(struct ath10k_htc_ep *ep) 91 { 92 struct ath10k *ar = ep->htc->ar; 93 94 if (!ep->tx_credit_flow_enabled) 95 return false; 96 if (ep->tx_credits >= ep->tx_credits_per_max_message) 97 return false; 98 99 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC: endpoint %d needs credit update\n", 100 ep->eid); 101 return true; 102 } 103 104 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep, 105 struct sk_buff *skb) 106 { 107 struct ath10k_htc_hdr *hdr; 108 109 hdr = (struct ath10k_htc_hdr *)skb->data; 110 111 hdr->eid = ep->eid; 112 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); 113 hdr->flags = 0; 114 115 spin_lock_bh(&ep->htc->tx_lock); 116 hdr->seq_no = ep->seq_no++; 117 118 if (ath10k_htc_ep_need_credit_update(ep)) 119 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE; 120 121 spin_unlock_bh(&ep->htc->tx_lock); 122 } 123 124 int ath10k_htc_send(struct ath10k_htc *htc, 125 enum ath10k_htc_ep_id eid, 126 struct sk_buff *skb) 127 { 128 struct ath10k *ar = htc->ar; 129 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 130 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 131 struct ath10k_hif_sg_item sg_item; 132 struct device *dev = htc->ar->dev; 133 int credits = 0; 134 int ret; 135 136 if (htc->ar->state == ATH10K_STATE_WEDGED) 137 return -ECOMM; 138 139 if (eid >= ATH10K_HTC_EP_COUNT) { 140 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid); 141 return -ENOENT; 142 } 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 ath10k_dbg(ar, ATH10K_DBG_HTC, 156 "htc ep %d consumed %d credits (total %d)\n", 157 eid, credits, ep->tx_credits); 158 spin_unlock_bh(&htc->tx_lock); 159 } 160 161 ath10k_htc_prepare_tx_skb(ep, skb); 162 163 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 164 ret = dma_mapping_error(dev, skb_cb->paddr); 165 if (ret) 166 goto err_credits; 167 168 sg_item.transfer_id = ep->eid; 169 sg_item.transfer_context = skb; 170 sg_item.vaddr = skb->data; 171 sg_item.paddr = skb_cb->paddr; 172 sg_item.len = skb->len; 173 174 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1); 175 if (ret) 176 goto err_unmap; 177 178 return 0; 179 180 err_unmap: 181 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 182 err_credits: 183 if (ep->tx_credit_flow_enabled) { 184 spin_lock_bh(&htc->tx_lock); 185 ep->tx_credits += credits; 186 ath10k_dbg(ar, ATH10K_DBG_HTC, 187 "htc ep %d reverted %d credits back (total %d)\n", 188 eid, credits, ep->tx_credits); 189 spin_unlock_bh(&htc->tx_lock); 190 191 if (ep->ep_ops.ep_tx_credits) 192 ep->ep_ops.ep_tx_credits(htc->ar); 193 } 194 err_pull: 195 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 196 return ret; 197 } 198 199 static int ath10k_htc_tx_completion_handler(struct ath10k *ar, 200 struct sk_buff *skb, 201 unsigned int eid) 202 { 203 struct ath10k_htc *htc = &ar->htc; 204 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 205 206 if (WARN_ON_ONCE(!skb)) 207 return 0; 208 209 ath10k_htc_notify_tx_completion(ep, skb); 210 /* the skb now belongs to the completion handler */ 211 212 return 0; 213 } 214 215 /***********/ 216 /* Receive */ 217 /***********/ 218 219 static void 220 ath10k_htc_process_credit_report(struct ath10k_htc *htc, 221 const struct ath10k_htc_credit_report *report, 222 int len, 223 enum ath10k_htc_ep_id eid) 224 { 225 struct ath10k *ar = htc->ar; 226 struct ath10k_htc_ep *ep; 227 int i, n_reports; 228 229 if (len % sizeof(*report)) 230 ath10k_warn(ar, "Uneven credit report len %d", len); 231 232 n_reports = len / sizeof(*report); 233 234 spin_lock_bh(&htc->tx_lock); 235 for (i = 0; i < n_reports; i++, report++) { 236 if (report->eid >= ATH10K_HTC_EP_COUNT) 237 break; 238 239 ep = &htc->endpoint[report->eid]; 240 ep->tx_credits += report->credits; 241 242 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 243 report->eid, report->credits, ep->tx_credits); 244 245 if (ep->ep_ops.ep_tx_credits) { 246 spin_unlock_bh(&htc->tx_lock); 247 ep->ep_ops.ep_tx_credits(htc->ar); 248 spin_lock_bh(&htc->tx_lock); 249 } 250 } 251 spin_unlock_bh(&htc->tx_lock); 252 } 253 254 static int ath10k_htc_process_trailer(struct ath10k_htc *htc, 255 u8 *buffer, 256 int length, 257 enum ath10k_htc_ep_id src_eid) 258 { 259 struct ath10k *ar = htc->ar; 260 int status = 0; 261 struct ath10k_htc_record *record; 262 u8 *orig_buffer; 263 int orig_length; 264 size_t len; 265 266 orig_buffer = buffer; 267 orig_length = length; 268 269 while (length > 0) { 270 record = (struct ath10k_htc_record *)buffer; 271 272 if (length < sizeof(record->hdr)) { 273 status = -EINVAL; 274 break; 275 } 276 277 if (record->hdr.len > length) { 278 /* no room left in buffer for record */ 279 ath10k_warn(ar, "Invalid record length: %d\n", 280 record->hdr.len); 281 status = -EINVAL; 282 break; 283 } 284 285 switch (record->hdr.id) { 286 case ATH10K_HTC_RECORD_CREDITS: 287 len = sizeof(struct ath10k_htc_credit_report); 288 if (record->hdr.len < len) { 289 ath10k_warn(ar, "Credit report too long\n"); 290 status = -EINVAL; 291 break; 292 } 293 ath10k_htc_process_credit_report(htc, 294 record->credit_report, 295 record->hdr.len, 296 src_eid); 297 break; 298 default: 299 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", 300 record->hdr.id, record->hdr.len); 301 break; 302 } 303 304 if (status) 305 break; 306 307 /* multiple records may be present in a trailer */ 308 buffer += sizeof(record->hdr) + record->hdr.len; 309 length -= sizeof(record->hdr) + record->hdr.len; 310 } 311 312 if (status) 313 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "", 314 orig_buffer, orig_length); 315 316 return status; 317 } 318 319 static int ath10k_htc_rx_completion_handler(struct ath10k *ar, 320 struct sk_buff *skb, 321 u8 pipe_id) 322 { 323 int status = 0; 324 struct ath10k_htc *htc = &ar->htc; 325 struct ath10k_htc_hdr *hdr; 326 struct ath10k_htc_ep *ep; 327 u16 payload_len; 328 u32 trailer_len = 0; 329 size_t min_len; 330 u8 eid; 331 bool trailer_present; 332 333 hdr = (struct ath10k_htc_hdr *)skb->data; 334 skb_pull(skb, sizeof(*hdr)); 335 336 eid = hdr->eid; 337 338 if (eid >= ATH10K_HTC_EP_COUNT) { 339 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid); 340 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "", 341 hdr, sizeof(*hdr)); 342 status = -EINVAL; 343 goto out; 344 } 345 346 ep = &htc->endpoint[eid]; 347 348 /* 349 * If this endpoint that received a message from the target has 350 * a to-target HIF pipe whose send completions are polled rather 351 * than interrupt-driven, this is a good point to ask HIF to check 352 * whether it has any completed sends to handle. 353 */ 354 if (ep->ul_is_polled) 355 ath10k_htc_send_complete_check(ep, 1); 356 357 payload_len = __le16_to_cpu(hdr->len); 358 359 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { 360 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n", 361 payload_len + sizeof(*hdr)); 362 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "", 363 hdr, sizeof(*hdr)); 364 status = -EINVAL; 365 goto out; 366 } 367 368 if (skb->len < payload_len) { 369 ath10k_dbg(ar, ATH10K_DBG_HTC, 370 "HTC Rx: insufficient length, got %d, expected %d\n", 371 skb->len, payload_len); 372 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", 373 "", hdr, sizeof(*hdr)); 374 status = -EINVAL; 375 goto out; 376 } 377 378 /* get flags to check for trailer */ 379 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; 380 if (trailer_present) { 381 u8 *trailer; 382 383 trailer_len = hdr->trailer_len; 384 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); 385 386 if ((trailer_len < min_len) || 387 (trailer_len > payload_len)) { 388 ath10k_warn(ar, "Invalid trailer length: %d\n", 389 trailer_len); 390 status = -EPROTO; 391 goto out; 392 } 393 394 trailer = (u8 *)hdr; 395 trailer += sizeof(*hdr); 396 trailer += payload_len; 397 trailer -= trailer_len; 398 status = ath10k_htc_process_trailer(htc, trailer, 399 trailer_len, hdr->eid); 400 if (status) 401 goto out; 402 403 skb_trim(skb, skb->len - trailer_len); 404 } 405 406 if (((int)payload_len - (int)trailer_len) <= 0) 407 /* zero length packet with trailer data, just drop these */ 408 goto out; 409 410 if (eid == ATH10K_HTC_EP_0) { 411 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; 412 413 switch (__le16_to_cpu(msg->hdr.message_id)) { 414 default: 415 /* handle HTC control message */ 416 if (completion_done(&htc->ctl_resp)) { 417 /* 418 * this is a fatal error, target should not be 419 * sending unsolicited messages on the ep 0 420 */ 421 ath10k_warn(ar, "HTC rx ctrl still processing\n"); 422 status = -EINVAL; 423 complete(&htc->ctl_resp); 424 goto out; 425 } 426 427 htc->control_resp_len = 428 min_t(int, skb->len, 429 ATH10K_HTC_MAX_CTRL_MSG_LEN); 430 431 memcpy(htc->control_resp_buffer, skb->data, 432 htc->control_resp_len); 433 434 complete(&htc->ctl_resp); 435 break; 436 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: 437 htc->htc_ops.target_send_suspend_complete(ar); 438 } 439 goto out; 440 } 441 442 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n", 443 eid, skb); 444 ep->ep_ops.ep_rx_complete(ar, skb); 445 446 /* skb is now owned by the rx completion handler */ 447 skb = NULL; 448 out: 449 kfree_skb(skb); 450 451 return status; 452 } 453 454 static void ath10k_htc_control_rx_complete(struct ath10k *ar, 455 struct sk_buff *skb) 456 { 457 /* This is unexpected. FW is not supposed to send regular rx on this 458 * endpoint. */ 459 ath10k_warn(ar, "unexpected htc rx\n"); 460 kfree_skb(skb); 461 } 462 463 /***************/ 464 /* Init/Deinit */ 465 /***************/ 466 467 static const char *htc_service_name(enum ath10k_htc_svc_id id) 468 { 469 switch (id) { 470 case ATH10K_HTC_SVC_ID_RESERVED: 471 return "Reserved"; 472 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 473 return "Control"; 474 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 475 return "WMI"; 476 case ATH10K_HTC_SVC_ID_WMI_DATA_BE: 477 return "DATA BE"; 478 case ATH10K_HTC_SVC_ID_WMI_DATA_BK: 479 return "DATA BK"; 480 case ATH10K_HTC_SVC_ID_WMI_DATA_VI: 481 return "DATA VI"; 482 case ATH10K_HTC_SVC_ID_WMI_DATA_VO: 483 return "DATA VO"; 484 case ATH10K_HTC_SVC_ID_NMI_CONTROL: 485 return "NMI Control"; 486 case ATH10K_HTC_SVC_ID_NMI_DATA: 487 return "NMI Data"; 488 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 489 return "HTT Data"; 490 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: 491 return "RAW"; 492 } 493 494 return "Unknown"; 495 } 496 497 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) 498 { 499 struct ath10k_htc_ep *ep; 500 int i; 501 502 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { 503 ep = &htc->endpoint[i]; 504 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; 505 ep->max_ep_message_len = 0; 506 ep->max_tx_queue_depth = 0; 507 ep->eid = i; 508 ep->htc = htc; 509 ep->tx_credit_flow_enabled = true; 510 } 511 } 512 513 static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) 514 { 515 struct ath10k_htc_svc_tx_credits *entry; 516 517 entry = &htc->service_tx_alloc[0]; 518 519 /* 520 * for PCIE allocate all credists/HTC buffers to WMI. 521 * no buffers are used/required for data. data always 522 * remains on host. 523 */ 524 entry++; 525 entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; 526 entry->credit_allocation = htc->total_transmit_credits; 527 } 528 529 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, 530 u16 service_id) 531 { 532 u8 allocation = 0; 533 int i; 534 535 for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { 536 if (htc->service_tx_alloc[i].service_id == service_id) 537 allocation = 538 htc->service_tx_alloc[i].credit_allocation; 539 } 540 541 return allocation; 542 } 543 544 int ath10k_htc_wait_target(struct ath10k_htc *htc) 545 { 546 struct ath10k *ar = htc->ar; 547 int i, status = 0; 548 struct ath10k_htc_svc_conn_req conn_req; 549 struct ath10k_htc_svc_conn_resp conn_resp; 550 struct ath10k_htc_msg *msg; 551 u16 message_id; 552 u16 credit_count; 553 u16 credit_size; 554 555 status = wait_for_completion_timeout(&htc->ctl_resp, 556 ATH10K_HTC_WAIT_TIMEOUT_HZ); 557 if (status == 0) { 558 /* Workaround: In some cases the PCI HIF doesn't 559 * receive interrupt for the control response message 560 * even if the buffer was completed. It is suspected 561 * iomap writes unmasking PCI CE irqs aren't propagated 562 * properly in KVM PCI-passthrough sometimes. 563 */ 564 ath10k_warn(ar, "failed to receive control response completion, polling..\n"); 565 566 for (i = 0; i < CE_COUNT; i++) 567 ath10k_hif_send_complete_check(htc->ar, i, 1); 568 569 status = wait_for_completion_timeout(&htc->ctl_resp, 570 ATH10K_HTC_WAIT_TIMEOUT_HZ); 571 572 if (status == 0) 573 status = -ETIMEDOUT; 574 } 575 576 if (status < 0) { 577 ath10k_err(ar, "ctl_resp never came in (%d)\n", status); 578 return status; 579 } 580 581 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { 582 ath10k_err(ar, "Invalid HTC ready msg len:%d\n", 583 htc->control_resp_len); 584 return -ECOMM; 585 } 586 587 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 588 message_id = __le16_to_cpu(msg->hdr.message_id); 589 credit_count = __le16_to_cpu(msg->ready.credit_count); 590 credit_size = __le16_to_cpu(msg->ready.credit_size); 591 592 if (message_id != ATH10K_HTC_MSG_READY_ID) { 593 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id); 594 return -ECOMM; 595 } 596 597 htc->total_transmit_credits = credit_count; 598 htc->target_credit_size = credit_size; 599 600 ath10k_dbg(ar, ATH10K_DBG_HTC, 601 "Target ready! transmit resources: %d size:%d\n", 602 htc->total_transmit_credits, 603 htc->target_credit_size); 604 605 if ((htc->total_transmit_credits == 0) || 606 (htc->target_credit_size == 0)) { 607 ath10k_err(ar, "Invalid credit size received\n"); 608 return -ECOMM; 609 } 610 611 ath10k_htc_setup_target_buffer_assignments(htc); 612 613 /* setup our pseudo HTC control endpoint connection */ 614 memset(&conn_req, 0, sizeof(conn_req)); 615 memset(&conn_resp, 0, sizeof(conn_resp)); 616 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; 617 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; 618 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; 619 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; 620 621 /* connect fake service */ 622 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); 623 if (status) { 624 ath10k_err(ar, "could not connect to htc service (%d)\n", 625 status); 626 return status; 627 } 628 629 return 0; 630 } 631 632 int ath10k_htc_connect_service(struct ath10k_htc *htc, 633 struct ath10k_htc_svc_conn_req *conn_req, 634 struct ath10k_htc_svc_conn_resp *conn_resp) 635 { 636 struct ath10k *ar = htc->ar; 637 struct ath10k_htc_msg *msg; 638 struct ath10k_htc_conn_svc *req_msg; 639 struct ath10k_htc_conn_svc_response resp_msg_dummy; 640 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; 641 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; 642 struct ath10k_htc_ep *ep; 643 struct sk_buff *skb; 644 unsigned int max_msg_size = 0; 645 int length, status; 646 bool disable_credit_flow_ctrl = false; 647 u16 message_id, service_id, flags = 0; 648 u8 tx_alloc = 0; 649 650 /* special case for HTC pseudo control service */ 651 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { 652 disable_credit_flow_ctrl = true; 653 assigned_eid = ATH10K_HTC_EP_0; 654 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; 655 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 656 goto setup; 657 } 658 659 tx_alloc = ath10k_htc_get_credit_allocation(htc, 660 conn_req->service_id); 661 if (!tx_alloc) 662 ath10k_dbg(ar, ATH10K_DBG_BOOT, 663 "boot htc service %s does not allocate target credits\n", 664 htc_service_name(conn_req->service_id)); 665 666 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 667 if (!skb) { 668 ath10k_err(ar, "Failed to allocate HTC packet\n"); 669 return -ENOMEM; 670 } 671 672 length = sizeof(msg->hdr) + sizeof(msg->connect_service); 673 skb_put(skb, length); 674 memset(skb->data, 0, length); 675 676 msg = (struct ath10k_htc_msg *)skb->data; 677 msg->hdr.message_id = 678 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); 679 680 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); 681 682 /* Only enable credit flow control for WMI ctrl service */ 683 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { 684 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 685 disable_credit_flow_ctrl = true; 686 } 687 688 req_msg = &msg->connect_service; 689 req_msg->flags = __cpu_to_le16(flags); 690 req_msg->service_id = __cpu_to_le16(conn_req->service_id); 691 692 reinit_completion(&htc->ctl_resp); 693 694 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 695 if (status) { 696 kfree_skb(skb); 697 return status; 698 } 699 700 /* wait for response */ 701 status = wait_for_completion_timeout(&htc->ctl_resp, 702 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); 703 if (status <= 0) { 704 if (status == 0) 705 status = -ETIMEDOUT; 706 ath10k_err(ar, "Service connect timeout: %d\n", status); 707 return status; 708 } 709 710 /* we controlled the buffer creation, it's aligned */ 711 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 712 resp_msg = &msg->connect_service_response; 713 message_id = __le16_to_cpu(msg->hdr.message_id); 714 service_id = __le16_to_cpu(resp_msg->service_id); 715 716 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 717 (htc->control_resp_len < sizeof(msg->hdr) + 718 sizeof(msg->connect_service_response))) { 719 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id); 720 return -EPROTO; 721 } 722 723 ath10k_dbg(ar, ATH10K_DBG_HTC, 724 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", 725 htc_service_name(service_id), 726 resp_msg->status, resp_msg->eid); 727 728 conn_resp->connect_resp_code = resp_msg->status; 729 730 /* check response status */ 731 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { 732 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n", 733 htc_service_name(service_id), 734 resp_msg->status); 735 return -EPROTO; 736 } 737 738 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; 739 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); 740 741 setup: 742 743 if (assigned_eid >= ATH10K_HTC_EP_COUNT) 744 return -EPROTO; 745 746 if (max_msg_size == 0) 747 return -EPROTO; 748 749 ep = &htc->endpoint[assigned_eid]; 750 ep->eid = assigned_eid; 751 752 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) 753 return -EPROTO; 754 755 /* return assigned endpoint to caller */ 756 conn_resp->eid = assigned_eid; 757 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); 758 759 /* setup the endpoint */ 760 ep->service_id = conn_req->service_id; 761 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 762 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); 763 ep->tx_credits = tx_alloc; 764 ep->tx_credit_size = htc->target_credit_size; 765 ep->tx_credits_per_max_message = ep->max_ep_message_len / 766 htc->target_credit_size; 767 768 if (ep->max_ep_message_len % htc->target_credit_size) 769 ep->tx_credits_per_max_message++; 770 771 /* copy all the callbacks */ 772 ep->ep_ops = conn_req->ep_ops; 773 774 status = ath10k_hif_map_service_to_pipe(htc->ar, 775 ep->service_id, 776 &ep->ul_pipe_id, 777 &ep->dl_pipe_id, 778 &ep->ul_is_polled, 779 &ep->dl_is_polled); 780 if (status) 781 return status; 782 783 ath10k_dbg(ar, ATH10K_DBG_BOOT, 784 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 785 htc_service_name(ep->service_id), ep->ul_pipe_id, 786 ep->dl_pipe_id, ep->eid); 787 788 ath10k_dbg(ar, ATH10K_DBG_BOOT, 789 "boot htc ep %d ul polled %d dl polled %d\n", 790 ep->eid, ep->ul_is_polled, ep->dl_is_polled); 791 792 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 793 ep->tx_credit_flow_enabled = false; 794 ath10k_dbg(ar, ATH10K_DBG_BOOT, 795 "boot htc service '%s' eid %d TX flow control disabled\n", 796 htc_service_name(ep->service_id), assigned_eid); 797 } 798 799 return status; 800 } 801 802 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size) 803 { 804 struct sk_buff *skb; 805 806 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); 807 if (!skb) 808 return NULL; 809 810 skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); 811 812 /* FW/HTC requires 4-byte aligned streams */ 813 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 814 ath10k_warn(ar, "Unaligned HTC tx skb\n"); 815 816 return skb; 817 } 818 819 int ath10k_htc_start(struct ath10k_htc *htc) 820 { 821 struct ath10k *ar = htc->ar; 822 struct sk_buff *skb; 823 int status = 0; 824 struct ath10k_htc_msg *msg; 825 826 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 827 if (!skb) 828 return -ENOMEM; 829 830 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); 831 memset(skb->data, 0, skb->len); 832 833 msg = (struct ath10k_htc_msg *)skb->data; 834 msg->hdr.message_id = 835 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); 836 837 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); 838 839 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 840 if (status) { 841 kfree_skb(skb); 842 return status; 843 } 844 845 return 0; 846 } 847 848 /* registered target arrival callback from the HIF layer */ 849 int ath10k_htc_init(struct ath10k *ar) 850 { 851 struct ath10k_hif_cb htc_callbacks; 852 struct ath10k_htc_ep *ep = NULL; 853 struct ath10k_htc *htc = &ar->htc; 854 855 spin_lock_init(&htc->tx_lock); 856 857 ath10k_htc_reset_endpoint_states(htc); 858 859 /* setup HIF layer callbacks */ 860 htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler; 861 htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler; 862 htc->ar = ar; 863 864 /* Get HIF default pipe for HTC message exchange */ 865 ep = &htc->endpoint[ATH10K_HTC_EP_0]; 866 867 ath10k_hif_set_callbacks(ar, &htc_callbacks); 868 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); 869 870 init_completion(&htc->ctl_resp); 871 872 return 0; 873 } 874