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 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 61static 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 70static 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 */ 90static 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 104static 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 124int 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->eid = eid; 164 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 165 ret = dma_mapping_error(dev, skb_cb->paddr); 166 if (ret) { 167 ret = -EIO; 168 goto err_credits; 169 } 170 171 sg_item.transfer_id = ep->eid; 172 sg_item.transfer_context = skb; 173 sg_item.vaddr = skb->data; 174 sg_item.paddr = skb_cb->paddr; 175 sg_item.len = skb->len; 176 177 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1); 178 if (ret) 179 goto err_unmap; 180 181 return 0; 182 183err_unmap: 184 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 185err_credits: 186 if (ep->tx_credit_flow_enabled) { 187 spin_lock_bh(&htc->tx_lock); 188 ep->tx_credits += credits; 189 ath10k_dbg(ar, ATH10K_DBG_HTC, 190 "htc ep %d reverted %d credits back (total %d)\n", 191 eid, credits, ep->tx_credits); 192 spin_unlock_bh(&htc->tx_lock); 193 194 if (ep->ep_ops.ep_tx_credits) 195 ep->ep_ops.ep_tx_credits(htc->ar); 196 } 197err_pull: 198 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 199 return ret; 200} 201 202static int ath10k_htc_tx_completion_handler(struct ath10k *ar, 203 struct sk_buff *skb) 204{ 205 struct ath10k_htc *htc = &ar->htc; 206 struct ath10k_skb_cb *skb_cb; 207 struct ath10k_htc_ep *ep; 208 209 if (WARN_ON_ONCE(!skb)) 210 return 0; 211 212 skb_cb = ATH10K_SKB_CB(skb); 213 ep = &htc->endpoint[skb_cb->eid]; 214 215 ath10k_htc_notify_tx_completion(ep, skb); 216 /* the skb now belongs to the completion handler */ 217 218 return 0; 219} 220 221/***********/ 222/* Receive */ 223/***********/ 224 225static void 226ath10k_htc_process_credit_report(struct ath10k_htc *htc, 227 const struct ath10k_htc_credit_report *report, 228 int len, 229 enum ath10k_htc_ep_id eid) 230{ 231 struct ath10k *ar = htc->ar; 232 struct ath10k_htc_ep *ep; 233 int i, n_reports; 234 235 if (len % sizeof(*report)) 236 ath10k_warn(ar, "Uneven credit report len %d", len); 237 238 n_reports = len / sizeof(*report); 239 240 spin_lock_bh(&htc->tx_lock); 241 for (i = 0; i < n_reports; i++, report++) { 242 if (report->eid >= ATH10K_HTC_EP_COUNT) 243 break; 244 245 ep = &htc->endpoint[report->eid]; 246 ep->tx_credits += report->credits; 247 248 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 249 report->eid, report->credits, ep->tx_credits); 250 251 if (ep->ep_ops.ep_tx_credits) { 252 spin_unlock_bh(&htc->tx_lock); 253 ep->ep_ops.ep_tx_credits(htc->ar); 254 spin_lock_bh(&htc->tx_lock); 255 } 256 } 257 spin_unlock_bh(&htc->tx_lock); 258} 259 260static int ath10k_htc_process_trailer(struct ath10k_htc *htc, 261 u8 *buffer, 262 int length, 263 enum ath10k_htc_ep_id src_eid) 264{ 265 struct ath10k *ar = htc->ar; 266 int status = 0; 267 struct ath10k_htc_record *record; 268 u8 *orig_buffer; 269 int orig_length; 270 size_t len; 271 272 orig_buffer = buffer; 273 orig_length = length; 274 275 while (length > 0) { 276 record = (struct ath10k_htc_record *)buffer; 277 278 if (length < sizeof(record->hdr)) { 279 status = -EINVAL; 280 break; 281 } 282 283 if (record->hdr.len > length) { 284 /* no room left in buffer for record */ 285 ath10k_warn(ar, "Invalid record length: %d\n", 286 record->hdr.len); 287 status = -EINVAL; 288 break; 289 } 290 291 switch (record->hdr.id) { 292 case ATH10K_HTC_RECORD_CREDITS: 293 len = sizeof(struct ath10k_htc_credit_report); 294 if (record->hdr.len < len) { 295 ath10k_warn(ar, "Credit report too long\n"); 296 status = -EINVAL; 297 break; 298 } 299 ath10k_htc_process_credit_report(htc, 300 record->credit_report, 301 record->hdr.len, 302 src_eid); 303 break; 304 default: 305 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", 306 record->hdr.id, record->hdr.len); 307 break; 308 } 309 310 if (status) 311 break; 312 313 /* multiple records may be present in a trailer */ 314 buffer += sizeof(record->hdr) + record->hdr.len; 315 length -= sizeof(record->hdr) + record->hdr.len; 316 } 317 318 if (status) 319 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "", 320 orig_buffer, orig_length); 321 322 return status; 323} 324 325static int ath10k_htc_rx_completion_handler(struct ath10k *ar, 326 struct sk_buff *skb) 327{ 328 int status = 0; 329 struct ath10k_htc *htc = &ar->htc; 330 struct ath10k_htc_hdr *hdr; 331 struct ath10k_htc_ep *ep; 332 u16 payload_len; 333 u32 trailer_len = 0; 334 size_t min_len; 335 u8 eid; 336 bool trailer_present; 337 338 hdr = (struct ath10k_htc_hdr *)skb->data; 339 skb_pull(skb, sizeof(*hdr)); 340 341 eid = hdr->eid; 342 343 if (eid >= ATH10K_HTC_EP_COUNT) { 344 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid); 345 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "", 346 hdr, sizeof(*hdr)); 347 status = -EINVAL; 348 goto out; 349 } 350 351 ep = &htc->endpoint[eid]; 352 353 /* 354 * If this endpoint that received a message from the target has 355 * a to-target HIF pipe whose send completions are polled rather 356 * than interrupt-driven, this is a good point to ask HIF to check 357 * whether it has any completed sends to handle. 358 */ 359 if (ep->ul_is_polled) 360 ath10k_htc_send_complete_check(ep, 1); 361 362 payload_len = __le16_to_cpu(hdr->len); 363 364 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { 365 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n", 366 payload_len + sizeof(*hdr)); 367 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "", 368 hdr, sizeof(*hdr)); 369 status = -EINVAL; 370 goto out; 371 } 372 373 if (skb->len < payload_len) { 374 ath10k_dbg(ar, ATH10K_DBG_HTC, 375 "HTC Rx: insufficient length, got %d, expected %d\n", 376 skb->len, payload_len); 377 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", 378 "", hdr, sizeof(*hdr)); 379 status = -EINVAL; 380 goto out; 381 } 382 383 /* get flags to check for trailer */ 384 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; 385 if (trailer_present) { 386 u8 *trailer; 387 388 trailer_len = hdr->trailer_len; 389 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); 390 391 if ((trailer_len < min_len) || 392 (trailer_len > payload_len)) { 393 ath10k_warn(ar, "Invalid trailer length: %d\n", 394 trailer_len); 395 status = -EPROTO; 396 goto out; 397 } 398 399 trailer = (u8 *)hdr; 400 trailer += sizeof(*hdr); 401 trailer += payload_len; 402 trailer -= trailer_len; 403 status = ath10k_htc_process_trailer(htc, trailer, 404 trailer_len, hdr->eid); 405 if (status) 406 goto out; 407 408 skb_trim(skb, skb->len - trailer_len); 409 } 410 411 if (((int)payload_len - (int)trailer_len) <= 0) 412 /* zero length packet with trailer data, just drop these */ 413 goto out; 414 415 if (eid == ATH10K_HTC_EP_0) { 416 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; 417 418 switch (__le16_to_cpu(msg->hdr.message_id)) { 419 default: 420 /* handle HTC control message */ 421 if (completion_done(&htc->ctl_resp)) { 422 /* 423 * this is a fatal error, target should not be 424 * sending unsolicited messages on the ep 0 425 */ 426 ath10k_warn(ar, "HTC rx ctrl still processing\n"); 427 status = -EINVAL; 428 complete(&htc->ctl_resp); 429 goto out; 430 } 431 432 htc->control_resp_len = 433 min_t(int, skb->len, 434 ATH10K_HTC_MAX_CTRL_MSG_LEN); 435 436 memcpy(htc->control_resp_buffer, skb->data, 437 htc->control_resp_len); 438 439 complete(&htc->ctl_resp); 440 break; 441 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: 442 htc->htc_ops.target_send_suspend_complete(ar); 443 } 444 goto out; 445 } 446 447 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %p\n", 448 eid, skb); 449 ep->ep_ops.ep_rx_complete(ar, skb); 450 451 /* skb is now owned by the rx completion handler */ 452 skb = NULL; 453out: 454 kfree_skb(skb); 455 456 return status; 457} 458 459static void ath10k_htc_control_rx_complete(struct ath10k *ar, 460 struct sk_buff *skb) 461{ 462 /* This is unexpected. FW is not supposed to send regular rx on this 463 * endpoint. */ 464 ath10k_warn(ar, "unexpected htc rx\n"); 465 kfree_skb(skb); 466} 467 468/***************/ 469/* Init/Deinit */ 470/***************/ 471 472static const char *htc_service_name(enum ath10k_htc_svc_id id) 473{ 474 switch (id) { 475 case ATH10K_HTC_SVC_ID_RESERVED: 476 return "Reserved"; 477 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 478 return "Control"; 479 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 480 return "WMI"; 481 case ATH10K_HTC_SVC_ID_WMI_DATA_BE: 482 return "DATA BE"; 483 case ATH10K_HTC_SVC_ID_WMI_DATA_BK: 484 return "DATA BK"; 485 case ATH10K_HTC_SVC_ID_WMI_DATA_VI: 486 return "DATA VI"; 487 case ATH10K_HTC_SVC_ID_WMI_DATA_VO: 488 return "DATA VO"; 489 case ATH10K_HTC_SVC_ID_NMI_CONTROL: 490 return "NMI Control"; 491 case ATH10K_HTC_SVC_ID_NMI_DATA: 492 return "NMI Data"; 493 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 494 return "HTT Data"; 495 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: 496 return "RAW"; 497 } 498 499 return "Unknown"; 500} 501 502static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) 503{ 504 struct ath10k_htc_ep *ep; 505 int i; 506 507 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { 508 ep = &htc->endpoint[i]; 509 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; 510 ep->max_ep_message_len = 0; 511 ep->max_tx_queue_depth = 0; 512 ep->eid = i; 513 ep->htc = htc; 514 ep->tx_credit_flow_enabled = true; 515 } 516} 517 518static void ath10k_htc_setup_target_buffer_assignments(struct ath10k_htc *htc) 519{ 520 struct ath10k_htc_svc_tx_credits *entry; 521 522 entry = &htc->service_tx_alloc[0]; 523 524 /* 525 * for PCIE allocate all credists/HTC buffers to WMI. 526 * no buffers are used/required for data. data always 527 * remains on host. 528 */ 529 entry++; 530 entry->service_id = ATH10K_HTC_SVC_ID_WMI_CONTROL; 531 entry->credit_allocation = htc->total_transmit_credits; 532} 533 534static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, 535 u16 service_id) 536{ 537 u8 allocation = 0; 538 int i; 539 540 for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) { 541 if (htc->service_tx_alloc[i].service_id == service_id) 542 allocation = 543 htc->service_tx_alloc[i].credit_allocation; 544 } 545 546 return allocation; 547} 548 549int ath10k_htc_wait_target(struct ath10k_htc *htc) 550{ 551 struct ath10k *ar = htc->ar; 552 int i, status = 0; 553 struct ath10k_htc_svc_conn_req conn_req; 554 struct ath10k_htc_svc_conn_resp conn_resp; 555 struct ath10k_htc_msg *msg; 556 u16 message_id; 557 u16 credit_count; 558 u16 credit_size; 559 560 status = wait_for_completion_timeout(&htc->ctl_resp, 561 ATH10K_HTC_WAIT_TIMEOUT_HZ); 562 if (status == 0) { 563 /* Workaround: In some cases the PCI HIF doesn't 564 * receive interrupt for the control response message 565 * even if the buffer was completed. It is suspected 566 * iomap writes unmasking PCI CE irqs aren't propagated 567 * properly in KVM PCI-passthrough sometimes. 568 */ 569 ath10k_warn(ar, "failed to receive control response completion, polling..\n"); 570 571 for (i = 0; i < CE_COUNT; i++) 572 ath10k_hif_send_complete_check(htc->ar, i, 1); 573 574 status = wait_for_completion_timeout(&htc->ctl_resp, 575 ATH10K_HTC_WAIT_TIMEOUT_HZ); 576 577 if (status == 0) 578 status = -ETIMEDOUT; 579 } 580 581 if (status < 0) { 582 ath10k_err(ar, "ctl_resp never came in (%d)\n", status); 583 return status; 584 } 585 586 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { 587 ath10k_err(ar, "Invalid HTC ready msg len:%d\n", 588 htc->control_resp_len); 589 return -ECOMM; 590 } 591 592 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 593 message_id = __le16_to_cpu(msg->hdr.message_id); 594 credit_count = __le16_to_cpu(msg->ready.credit_count); 595 credit_size = __le16_to_cpu(msg->ready.credit_size); 596 597 if (message_id != ATH10K_HTC_MSG_READY_ID) { 598 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id); 599 return -ECOMM; 600 } 601 602 htc->total_transmit_credits = credit_count; 603 htc->target_credit_size = credit_size; 604 605 ath10k_dbg(ar, ATH10K_DBG_HTC, 606 "Target ready! transmit resources: %d size:%d\n", 607 htc->total_transmit_credits, 608 htc->target_credit_size); 609 610 if ((htc->total_transmit_credits == 0) || 611 (htc->target_credit_size == 0)) { 612 ath10k_err(ar, "Invalid credit size received\n"); 613 return -ECOMM; 614 } 615 616 ath10k_htc_setup_target_buffer_assignments(htc); 617 618 /* setup our pseudo HTC control endpoint connection */ 619 memset(&conn_req, 0, sizeof(conn_req)); 620 memset(&conn_resp, 0, sizeof(conn_resp)); 621 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; 622 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; 623 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; 624 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; 625 626 /* connect fake service */ 627 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); 628 if (status) { 629 ath10k_err(ar, "could not connect to htc service (%d)\n", 630 status); 631 return status; 632 } 633 634 return 0; 635} 636 637int ath10k_htc_connect_service(struct ath10k_htc *htc, 638 struct ath10k_htc_svc_conn_req *conn_req, 639 struct ath10k_htc_svc_conn_resp *conn_resp) 640{ 641 struct ath10k *ar = htc->ar; 642 struct ath10k_htc_msg *msg; 643 struct ath10k_htc_conn_svc *req_msg; 644 struct ath10k_htc_conn_svc_response resp_msg_dummy; 645 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; 646 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; 647 struct ath10k_htc_ep *ep; 648 struct sk_buff *skb; 649 unsigned int max_msg_size = 0; 650 int length, status; 651 bool disable_credit_flow_ctrl = false; 652 u16 message_id, service_id, flags = 0; 653 u8 tx_alloc = 0; 654 655 /* special case for HTC pseudo control service */ 656 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { 657 disable_credit_flow_ctrl = true; 658 assigned_eid = ATH10K_HTC_EP_0; 659 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; 660 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 661 goto setup; 662 } 663 664 tx_alloc = ath10k_htc_get_credit_allocation(htc, 665 conn_req->service_id); 666 if (!tx_alloc) 667 ath10k_dbg(ar, ATH10K_DBG_BOOT, 668 "boot htc service %s does not allocate target credits\n", 669 htc_service_name(conn_req->service_id)); 670 671 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 672 if (!skb) { 673 ath10k_err(ar, "Failed to allocate HTC packet\n"); 674 return -ENOMEM; 675 } 676 677 length = sizeof(msg->hdr) + sizeof(msg->connect_service); 678 skb_put(skb, length); 679 memset(skb->data, 0, length); 680 681 msg = (struct ath10k_htc_msg *)skb->data; 682 msg->hdr.message_id = 683 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); 684 685 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); 686 687 /* Only enable credit flow control for WMI ctrl service */ 688 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { 689 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 690 disable_credit_flow_ctrl = true; 691 } 692 693 req_msg = &msg->connect_service; 694 req_msg->flags = __cpu_to_le16(flags); 695 req_msg->service_id = __cpu_to_le16(conn_req->service_id); 696 697 reinit_completion(&htc->ctl_resp); 698 699 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 700 if (status) { 701 kfree_skb(skb); 702 return status; 703 } 704 705 /* wait for response */ 706 status = wait_for_completion_timeout(&htc->ctl_resp, 707 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); 708 if (status == 0) { 709 ath10k_err(ar, "Service connect timeout: %d\n", status); 710 return -ETIMEDOUT; 711 } 712 713 /* we controlled the buffer creation, it's aligned */ 714 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 715 resp_msg = &msg->connect_service_response; 716 message_id = __le16_to_cpu(msg->hdr.message_id); 717 service_id = __le16_to_cpu(resp_msg->service_id); 718 719 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 720 (htc->control_resp_len < sizeof(msg->hdr) + 721 sizeof(msg->connect_service_response))) { 722 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id); 723 return -EPROTO; 724 } 725 726 ath10k_dbg(ar, ATH10K_DBG_HTC, 727 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", 728 htc_service_name(service_id), 729 resp_msg->status, resp_msg->eid); 730 731 conn_resp->connect_resp_code = resp_msg->status; 732 733 /* check response status */ 734 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { 735 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n", 736 htc_service_name(service_id), 737 resp_msg->status); 738 return -EPROTO; 739 } 740 741 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; 742 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); 743 744setup: 745 746 if (assigned_eid >= ATH10K_HTC_EP_COUNT) 747 return -EPROTO; 748 749 if (max_msg_size == 0) 750 return -EPROTO; 751 752 ep = &htc->endpoint[assigned_eid]; 753 ep->eid = assigned_eid; 754 755 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) 756 return -EPROTO; 757 758 /* return assigned endpoint to caller */ 759 conn_resp->eid = assigned_eid; 760 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); 761 762 /* setup the endpoint */ 763 ep->service_id = conn_req->service_id; 764 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 765 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); 766 ep->tx_credits = tx_alloc; 767 ep->tx_credit_size = htc->target_credit_size; 768 ep->tx_credits_per_max_message = ep->max_ep_message_len / 769 htc->target_credit_size; 770 771 if (ep->max_ep_message_len % htc->target_credit_size) 772 ep->tx_credits_per_max_message++; 773 774 /* copy all the callbacks */ 775 ep->ep_ops = conn_req->ep_ops; 776 777 status = ath10k_hif_map_service_to_pipe(htc->ar, 778 ep->service_id, 779 &ep->ul_pipe_id, 780 &ep->dl_pipe_id, 781 &ep->ul_is_polled, 782 &ep->dl_is_polled); 783 if (status) 784 return status; 785 786 ath10k_dbg(ar, ATH10K_DBG_BOOT, 787 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 788 htc_service_name(ep->service_id), ep->ul_pipe_id, 789 ep->dl_pipe_id, ep->eid); 790 791 ath10k_dbg(ar, ATH10K_DBG_BOOT, 792 "boot htc ep %d ul polled %d dl polled %d\n", 793 ep->eid, ep->ul_is_polled, ep->dl_is_polled); 794 795 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 796 ep->tx_credit_flow_enabled = false; 797 ath10k_dbg(ar, ATH10K_DBG_BOOT, 798 "boot htc service '%s' eid %d TX flow control disabled\n", 799 htc_service_name(ep->service_id), assigned_eid); 800 } 801 802 return status; 803} 804 805struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size) 806{ 807 struct sk_buff *skb; 808 809 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); 810 if (!skb) 811 return NULL; 812 813 skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); 814 815 /* FW/HTC requires 4-byte aligned streams */ 816 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 817 ath10k_warn(ar, "Unaligned HTC tx skb\n"); 818 819 return skb; 820} 821 822int ath10k_htc_start(struct ath10k_htc *htc) 823{ 824 struct ath10k *ar = htc->ar; 825 struct sk_buff *skb; 826 int status = 0; 827 struct ath10k_htc_msg *msg; 828 829 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 830 if (!skb) 831 return -ENOMEM; 832 833 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); 834 memset(skb->data, 0, skb->len); 835 836 msg = (struct ath10k_htc_msg *)skb->data; 837 msg->hdr.message_id = 838 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); 839 840 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); 841 842 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 843 if (status) { 844 kfree_skb(skb); 845 return status; 846 } 847 848 return 0; 849} 850 851/* registered target arrival callback from the HIF layer */ 852int ath10k_htc_init(struct ath10k *ar) 853{ 854 struct ath10k_hif_cb htc_callbacks; 855 struct ath10k_htc_ep *ep = NULL; 856 struct ath10k_htc *htc = &ar->htc; 857 858 spin_lock_init(&htc->tx_lock); 859 860 ath10k_htc_reset_endpoint_states(htc); 861 862 /* setup HIF layer callbacks */ 863 htc_callbacks.rx_completion = ath10k_htc_rx_completion_handler; 864 htc_callbacks.tx_completion = ath10k_htc_tx_completion_handler; 865 htc->ar = ar; 866 867 /* Get HIF default pipe for HTC message exchange */ 868 ep = &htc->endpoint[ATH10K_HTC_EP_0]; 869 870 ath10k_hif_set_callbacks(ar, &htc_callbacks); 871 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); 872 873 init_completion(&htc->ctl_resp); 874 875 return 0; 876} 877