1 /* 2 * Copyright (c) 2013-2021 The Linux Foundation. All rights reserved. 3 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for 6 * any purpose with or without fee is hereby granted, provided that the 7 * above copyright notice and this permission notice appear in all 8 * copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 13 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 14 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 15 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 16 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include "htc_debug.h" 21 #include "htc_internal.h" 22 #include "htc_credit_history.h" 23 #include <qdf_mem.h> /* qdf_mem_malloc */ 24 #include <qdf_nbuf.h> /* qdf_nbuf_t */ 25 #include "qdf_module.h" 26 27 /* #define USB_HIF_SINGLE_PIPE_DATA_SCHED */ 28 /* #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED */ 29 #define DATA_EP_SIZE 4 30 /* #endif */ 31 #define HTC_DATA_RESOURCE_THRS 256 32 #define HTC_DATA_MINDESC_PERPACKET 2 33 34 /* maximum number of requeue attempts before print */ 35 #define MAX_REQUEUE_WARN 5 36 37 enum HTC_SEND_QUEUE_RESULT { 38 HTC_SEND_QUEUE_OK = 0, /* packet was queued */ 39 HTC_SEND_QUEUE_DROP = 1, /* this packet should be dropped */ 40 }; 41 42 #ifndef DEBUG_CREDIT 43 #define DEBUG_CREDIT 0 44 #endif 45 46 #if DEBUG_CREDIT 47 /* bit mask to enable debug certain endpoint */ 48 static unsigned int ep_debug_mask = 49 (1 << ENDPOINT_0) | (1 << ENDPOINT_1) | (1 << ENDPOINT_2); 50 #endif 51 52 #ifdef QCA_WIFI_EMULATION 53 #define HTC_EMULATION_DELAY_IN_MS 20 54 /** 55 * htc_add_emulation_delay() - Adds a delay in before proceeding, only for 56 * emulation 57 * 58 * Return: None 59 */ 60 static inline void htc_add_emulation_delay(void) 61 { 62 qdf_mdelay(HTC_EMULATION_DELAY_IN_MS); 63 } 64 #else 65 static inline void htc_add_emulation_delay(void) 66 { 67 } 68 #endif 69 70 void htc_dump_counter_info(HTC_HANDLE HTCHandle) 71 { 72 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 73 74 if (!target) 75 return; 76 77 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 78 ("\n%s: ce_send_cnt = %d, TX_comp_cnt = %d\n", 79 __func__, target->ce_send_cnt, target->TX_comp_cnt)); 80 } 81 82 int htc_get_tx_queue_depth(HTC_HANDLE htc_handle, HTC_ENDPOINT_ID endpoint_id) 83 { 84 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc_handle); 85 HTC_ENDPOINT *endpoint = &target->endpoint[endpoint_id]; 86 87 return HTC_PACKET_QUEUE_DEPTH(&endpoint->TxQueue); 88 } 89 qdf_export_symbol(htc_get_tx_queue_depth); 90 91 void htc_get_control_endpoint_tx_host_credits(HTC_HANDLE HTCHandle, 92 int *credits) 93 { 94 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 95 HTC_ENDPOINT *pEndpoint; 96 int i; 97 98 if (!credits || !target) { 99 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("%s: invalid args", __func__)); 100 return; 101 } 102 103 *credits = 0; 104 LOCK_HTC_TX(target); 105 for (i = 0; i < ENDPOINT_MAX; i++) { 106 pEndpoint = &target->endpoint[i]; 107 if (pEndpoint->service_id == WMI_CONTROL_SVC) { 108 *credits = pEndpoint->TxCredits; 109 break; 110 } 111 } 112 UNLOCK_HTC_TX(target); 113 } 114 115 static inline void restore_tx_packet(HTC_TARGET *target, HTC_PACKET *pPacket) 116 { 117 qdf_nbuf_t netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 118 119 if (pPacket->PktInfo.AsTx.Flags & HTC_TX_PACKET_FLAG_FIXUP_NETBUF) { 120 qdf_nbuf_unmap(target->osdev, netbuf, QDF_DMA_TO_DEVICE); 121 pPacket->PktInfo.AsTx.Flags &= ~HTC_TX_PACKET_FLAG_FIXUP_NETBUF; 122 } 123 if (pPacket->PktInfo.AsTx.Flags & 124 HTC_TX_PACKET_FLAG_HTC_HEADER_IN_NETBUF_DATA) { 125 qdf_nbuf_pull_head(netbuf, sizeof(HTC_FRAME_HDR)); 126 pPacket->PktInfo.AsTx.Flags &= 127 ~HTC_TX_PACKET_FLAG_HTC_HEADER_IN_NETBUF_DATA; 128 } 129 } 130 131 static void send_packet_completion(HTC_TARGET *target, HTC_PACKET *pPacket) 132 { 133 HTC_ENDPOINT *pEndpoint = &target->endpoint[pPacket->Endpoint]; 134 HTC_EP_SEND_PKT_COMPLETE EpTxComplete; 135 136 if ((pPacket->PktInfo.AsTx.Flags & HTC_TX_PACKET_FLAG_FIXUP_NETBUF) && 137 (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint))) 138 target->nbuf_nfc_unmap_count++; 139 140 restore_tx_packet(target, pPacket); 141 142 /* 143 * In case of SSR, we cannot call the upper layer completion 144 * callbacks, hence just free the nbuf and HTC packet here. 145 */ 146 if (target->hif_dev && hif_get_target_status(target->hif_dev)) { 147 htc_free_control_tx_packet(target, pPacket); 148 return; 149 } 150 151 /* do completion */ 152 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 153 ("HTC calling ep %d send complete callback on packet %pK\n", 154 pEndpoint->Id, pPacket)); 155 156 EpTxComplete = pEndpoint->EpCallBacks.EpTxComplete; 157 if (EpTxComplete) 158 EpTxComplete(pEndpoint->EpCallBacks.pContext, pPacket); 159 else 160 qdf_nbuf_free(pPacket->pPktContext); 161 162 163 } 164 165 #ifdef FEATURE_RUNTIME_PM 166 /** 167 * log_packet_info() - Log HTC packet information 168 * 169 * @target: handle of HTC context 170 * @pPacket: handle of HTC packet 171 * 172 * Return: None 173 */ 174 static void log_packet_info(HTC_TARGET *target, HTC_PACKET *pPacket) 175 { 176 HTC_ENDPOINT *pEndpoint = &target->endpoint[pPacket->Endpoint]; 177 HTC_EP_LOG_PKT ep_log_pkt; 178 qdf_nbuf_t netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 179 180 ep_log_pkt = pEndpoint->EpCallBacks.ep_log_pkt; 181 if (ep_log_pkt) { 182 qdf_nbuf_pull_head(netbuf, sizeof(HTC_FRAME_HDR)); 183 ep_log_pkt(pEndpoint->EpCallBacks.pContext, pPacket); 184 qdf_nbuf_push_head(netbuf, sizeof(HTC_FRAME_HDR)); 185 } 186 } 187 188 /** 189 * htc_inc_htt_runtime_cnt() - Increment htc htt runtime count 190 * @target: handle of HTC context 191 * 192 * Return: None 193 */ 194 static inline 195 void htc_inc_htt_runtime_cnt(HTC_TARGET *target) 196 { 197 qdf_atomic_inc(&target->htc_htt_runtime_cnt); 198 } 199 #else 200 static void log_packet_info(HTC_TARGET *target, HTC_PACKET *pPacket) 201 { 202 } 203 204 static inline 205 void htc_inc_htt_runtime_cnt(HTC_TARGET *target) 206 { 207 } 208 #endif 209 210 void htc_send_complete_check_cleanup(void *context) 211 { 212 HTC_ENDPOINT *pEndpoint = (HTC_ENDPOINT *) context; 213 214 htc_send_complete_check(pEndpoint, 1); 215 } 216 217 HTC_PACKET *allocate_htc_bundle_packet(HTC_TARGET *target) 218 { 219 HTC_PACKET *pPacket; 220 HTC_PACKET_QUEUE *pQueueSave; 221 qdf_nbuf_t netbuf; 222 223 LOCK_HTC_TX(target); 224 if (!target->pBundleFreeList) { 225 UNLOCK_HTC_TX(target); 226 netbuf = qdf_nbuf_alloc(NULL, 227 target->MaxMsgsPerHTCBundle * 228 target->TargetCreditSize, 0, 4, false); 229 AR_DEBUG_ASSERT(netbuf); 230 if (!netbuf) 231 return NULL; 232 pPacket = qdf_mem_malloc(sizeof(HTC_PACKET)); 233 AR_DEBUG_ASSERT(pPacket); 234 if (!pPacket) { 235 qdf_nbuf_free(netbuf); 236 return NULL; 237 } 238 pQueueSave = qdf_mem_malloc(sizeof(HTC_PACKET_QUEUE)); 239 AR_DEBUG_ASSERT(pQueueSave); 240 if (!pQueueSave) { 241 qdf_nbuf_free(netbuf); 242 qdf_mem_free(pPacket); 243 return NULL; 244 } 245 INIT_HTC_PACKET_QUEUE(pQueueSave); 246 pPacket->pContext = pQueueSave; 247 SET_HTC_PACKET_NET_BUF_CONTEXT(pPacket, netbuf); 248 pPacket->pBuffer = qdf_nbuf_data(netbuf); 249 pPacket->BufferLength = qdf_nbuf_len(netbuf); 250 251 /* store the original head room so that we can restore this 252 * when we "free" the packet. 253 * free packet puts the packet back on the free list 254 */ 255 pPacket->netbufOrigHeadRoom = qdf_nbuf_headroom(netbuf); 256 return pPacket; 257 } 258 /* already done malloc - restore from free list */ 259 pPacket = target->pBundleFreeList; 260 AR_DEBUG_ASSERT(pPacket); 261 if (!pPacket) { 262 UNLOCK_HTC_TX(target); 263 return NULL; 264 } 265 target->pBundleFreeList = (HTC_PACKET *) pPacket->ListLink.pNext; 266 UNLOCK_HTC_TX(target); 267 pPacket->ListLink.pNext = NULL; 268 269 return pPacket; 270 } 271 272 void free_htc_bundle_packet(HTC_TARGET *target, HTC_PACKET *pPacket) 273 { 274 uint32_t curentHeadRoom; 275 qdf_nbuf_t netbuf; 276 HTC_PACKET_QUEUE *pQueueSave; 277 278 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 279 AR_DEBUG_ASSERT(netbuf); 280 if (!netbuf) { 281 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 282 ("\n%s: Invalid netbuf in HTC Packet\n", 283 __func__)); 284 return; 285 } 286 /* HIF adds data to the headroom section of the nbuf, restore their 287 * original size. If this is not done, headroom keeps shrinking with 288 * every HIF send and eventually HIF ends up doing another malloc big 289 * enough to store the data + its header 290 */ 291 292 curentHeadRoom = qdf_nbuf_headroom(netbuf); 293 qdf_nbuf_pull_head(netbuf, 294 pPacket->netbufOrigHeadRoom - curentHeadRoom); 295 qdf_nbuf_trim_tail(netbuf, qdf_nbuf_len(netbuf)); 296 297 /* restore the pBuffer pointer. HIF changes this */ 298 pPacket->pBuffer = qdf_nbuf_data(netbuf); 299 pPacket->BufferLength = qdf_nbuf_len(netbuf); 300 301 /* restore queue */ 302 pQueueSave = (HTC_PACKET_QUEUE *) pPacket->pContext; 303 if (qdf_unlikely(!pQueueSave)) { 304 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 305 ("\n%s: Invalid pQueueSave in HTC Packet\n", 306 __func__)); 307 AR_DEBUG_ASSERT(pQueueSave); 308 } else 309 INIT_HTC_PACKET_QUEUE(pQueueSave); 310 311 LOCK_HTC_TX(target); 312 if (!target->pBundleFreeList) { 313 target->pBundleFreeList = pPacket; 314 pPacket->ListLink.pNext = NULL; 315 } else { 316 pPacket->ListLink.pNext = (DL_LIST *) target->pBundleFreeList; 317 target->pBundleFreeList = pPacket; 318 } 319 UNLOCK_HTC_TX(target); 320 } 321 322 #if defined(DEBUG_HL_LOGGING) && defined(CONFIG_HL_SUPPORT) 323 324 /** 325 * htc_send_update_tx_bundle_stats() - update tx bundle stats depends 326 * on max bundle size 327 * @target: hif context 328 * @data_len: tx data len 329 * @TxCreditSize: endpoint tx credit size 330 * 331 * Return: None 332 */ 333 static inline void 334 htc_send_update_tx_bundle_stats(HTC_TARGET *target, 335 qdf_size_t data_len, 336 int TxCreditSize) 337 { 338 int index = ((data_len + TxCreditSize - 1) / TxCreditSize) - 1; 339 340 if (index < HTC_MAX_MSG_PER_BUNDLE_TX) 341 target->tx_bundle_stats[index]++; 342 } 343 344 /** 345 * htc_issue_tx_bundle_stats_inc() - increment in tx bundle stats 346 * on max bundle size 347 * @target: hif context 348 * 349 * Return: None 350 */ 351 static inline void 352 htc_issue_tx_bundle_stats_inc(HTC_TARGET *target) 353 { 354 target->tx_bundle_stats[0]++; 355 } 356 #else 357 358 static inline void 359 htc_send_update_tx_bundle_stats(HTC_TARGET *target, 360 qdf_size_t data_len, 361 int TxCreditSize) 362 { 363 } 364 365 static inline void 366 htc_issue_tx_bundle_stats_inc(HTC_TARGET *target) 367 { 368 } 369 #endif 370 371 #if defined(HIF_USB) || defined(HIF_SDIO) 372 #ifdef ENABLE_BUNDLE_TX 373 static QDF_STATUS htc_send_bundled_netbuf(HTC_TARGET *target, 374 HTC_ENDPOINT *pEndpoint, 375 unsigned char *pBundleBuffer, 376 HTC_PACKET *pPacketTx) 377 { 378 qdf_size_t data_len; 379 QDF_STATUS status; 380 qdf_nbuf_t bundleBuf; 381 uint32_t data_attr = 0; 382 383 bundleBuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacketTx); 384 data_len = pBundleBuffer - qdf_nbuf_data(bundleBuf); 385 qdf_nbuf_put_tail(bundleBuf, data_len); 386 SET_HTC_PACKET_INFO_TX(pPacketTx, 387 target, 388 pBundleBuffer, 389 data_len, 390 pEndpoint->Id, HTC_TX_PACKET_TAG_BUNDLED); 391 LOCK_HTC_TX(target); 392 HTC_PACKET_ENQUEUE(&pEndpoint->TxLookupQueue, pPacketTx); 393 pEndpoint->ul_outstanding_cnt++; 394 UNLOCK_HTC_TX(target); 395 #if DEBUG_BUNDLE 396 qdf_print(" Send bundle EP%d buffer size:0x%x, total:0x%x, count:%d.", 397 pEndpoint->Id, 398 pEndpoint->TxCreditSize, 399 data_len, data_len / pEndpoint->TxCreditSize); 400 #endif 401 402 htc_send_update_tx_bundle_stats(target, data_len, 403 pEndpoint->TxCreditSize); 404 405 status = hif_send_head(target->hif_dev, 406 pEndpoint->UL_PipeID, 407 pEndpoint->Id, data_len, 408 bundleBuf, data_attr); 409 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 410 HTC_PACKET_QUEUE requeue; 411 412 qdf_print("hif_send_head failed(len=%zu).", data_len); 413 INIT_HTC_PACKET_QUEUE(&requeue); 414 LOCK_HTC_TX(target); 415 pEndpoint->ul_outstanding_cnt--; 416 HTC_PACKET_REMOVE(&pEndpoint->TxLookupQueue, pPacketTx); 417 418 if (pPacketTx->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_BUNDLED) { 419 HTC_PACKET *temp_packet; 420 HTC_PACKET_QUEUE *packet_queue = 421 (HTC_PACKET_QUEUE *)pPacketTx->pContext; 422 423 HTC_PACKET_QUEUE_ITERATE_ALLOW_REMOVE(packet_queue, 424 temp_packet) { 425 HTC_PACKET_ENQUEUE(&requeue, temp_packet); 426 } HTC_PACKET_QUEUE_ITERATE_END; 427 428 UNLOCK_HTC_TX(target); 429 free_htc_bundle_packet(target, pPacketTx); 430 LOCK_HTC_TX(target); 431 432 } else { 433 HTC_PACKET_ENQUEUE(&requeue, pPacketTx); 434 } 435 436 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 437 &requeue); 438 UNLOCK_HTC_TX(target); 439 } 440 return status; 441 } 442 443 #ifdef QCA_TX_PADDING_CREDIT_SUPPORT 444 #define SDIO_BLOCK_SIZE 512 445 static int htc_tx_pad_credit_avail(HTC_ENDPOINT *ep) 446 { 447 int ret = 0; 448 449 if (!ep || !ep->EpCallBacks.pContext || 450 !ep->EpCallBacks.ep_padding_credit_update) 451 return 1; 452 453 ret = ep->EpCallBacks.ep_padding_credit_update(ep->EpCallBacks.pContext, 454 0); 455 456 if (ret < 2) 457 AR_DEBUG_PRINTF(ATH_DEBUG_INFO, ("%s ret %d\n", __func__, ret)); 458 459 return ret; 460 } 461 462 static bool htc_handle_extra_tx_credit(HTC_ENDPOINT *ep, 463 HTC_PACKET *p_last_htc_pkt, 464 unsigned char *p_last_pkt_bundle_buffer, 465 unsigned char **p_bundle_buffer, 466 int tot_data_len) 467 { 468 bool extra_tx_credit = FALSE; 469 HTC_FRAME_HDR *p_htc_hdr; 470 int first_buf_bundled_len = 0, last_buf_len = 0; 471 int sdio_pad = 0, free_space = 0; 472 int (*update_ep_padding_credit)(void *, int); 473 474 update_ep_padding_credit = ep->EpCallBacks.ep_padding_credit_update; 475 476 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 477 ("%s Tot data_len = %d\n", __func__, tot_data_len)); 478 479 if (!p_last_htc_pkt) 480 return extra_tx_credit; 481 482 last_buf_len = (p_last_htc_pkt->ActualLength + HTC_HDR_LENGTH); 483 if (tot_data_len != last_buf_len) { 484 first_buf_bundled_len = tot_data_len - ep->TxCreditSize; 485 free_space = tot_data_len - 486 (first_buf_bundled_len + last_buf_len); 487 } else { 488 free_space = ep->TxCreditSize - tot_data_len; 489 } 490 491 sdio_pad = SDIO_BLOCK_SIZE - ((first_buf_bundled_len + last_buf_len) % 492 SDIO_BLOCK_SIZE); 493 494 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 495 ("%s first_buf_bundled_len = %d last_buf_len = %d\n", 496 __func__, first_buf_bundled_len, last_buf_len)); 497 498 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 499 ("%s sdio_pad = %d free_space = %d\n", __func__, 500 sdio_pad, free_space)); 501 502 if (sdio_pad <= free_space) { 503 if (p_bundle_buffer && *p_bundle_buffer) { 504 /* Align Tx bundled buf to avoid a extra Padding buf */ 505 *p_bundle_buffer -= (free_space - sdio_pad); 506 } 507 } else { 508 /* Extra Padding Buffer needed, consume extra tx credit */ 509 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 510 ("%s Used a Tx credit for Padding Buffer\n", 511 __func__)); 512 p_htc_hdr = (HTC_FRAME_HDR *)(p_last_pkt_bundle_buffer); 513 p_htc_hdr->Flags |= HTC_FLAGS_PADDING_CHECK; 514 extra_tx_credit = TRUE; 515 if (ep->EpCallBacks.ep_padding_credit_update) { 516 /* Decrement 1 credit at host, 517 * due to extra tx credit consumed by padding buffer 518 */ 519 update_ep_padding_credit(ep->EpCallBacks.pContext, -1); 520 } 521 } 522 return extra_tx_credit; 523 } 524 #else 525 static int htc_tx_pad_credit_avail(HTC_ENDPOINT *ep) 526 { 527 return 1; 528 } 529 530 static bool htc_handle_extra_tx_credit(HTC_ENDPOINT *ep, 531 HTC_PACKET *p_last_htc_pkt, 532 unsigned char *p_last_pkt_bundle_buffer, 533 unsigned char **p_bundle_buffer, 534 int tot_data_len) 535 { 536 return FALSE; 537 } 538 #endif 539 540 /** 541 * htc_issue_packets_bundle() - HTC function to send bundle packets from a queue 542 * @target: HTC target on which packets need to be sent 543 * @pEndpoint: logical endpoint on which packets needs to be sent 544 * @pPktQueue: HTC packet queue containing the list of packets to be sent 545 * 546 * Return: void 547 */ 548 static void htc_issue_packets_bundle(HTC_TARGET *target, 549 HTC_ENDPOINT *pEndpoint, 550 HTC_PACKET_QUEUE *pPktQueue) 551 { 552 int i, frag_count, nbytes; 553 qdf_nbuf_t netbuf, bundleBuf; 554 unsigned char *pBundleBuffer = NULL; 555 HTC_PACKET *pPacket = NULL, *pPacketTx = NULL; 556 HTC_FRAME_HDR *pHtcHdr; 557 int last_credit_pad = 0; 558 int creditPad, creditRemainder, transferLength, bundlesSpaceRemaining = 559 0; 560 HTC_PACKET_QUEUE *pQueueSave = NULL; 561 HTC_PACKET *p_last_htc_pkt = NULL; 562 unsigned char *p_last_pkt_bundle_buffer = NULL; 563 564 bundlesSpaceRemaining = 565 target->MaxMsgsPerHTCBundle * pEndpoint->TxCreditSize; 566 pPacketTx = allocate_htc_bundle_packet(target); 567 if (!pPacketTx) { 568 /* good time to panic */ 569 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 570 ("allocate_htc_bundle_packet failed\n")); 571 AR_DEBUG_ASSERT(false); 572 return; 573 } 574 bundleBuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacketTx); 575 pBundleBuffer = qdf_nbuf_data(bundleBuf); 576 pQueueSave = (HTC_PACKET_QUEUE *) pPacketTx->pContext; 577 while (1) { 578 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 579 if (htc_tx_pad_credit_avail(pEndpoint) < 1) 580 break; 581 } 582 pPacket = htc_packet_dequeue(pPktQueue); 583 if (!pPacket) 584 break; 585 creditPad = 0; 586 transferLength = pPacket->ActualLength + HTC_HDR_LENGTH; 587 creditRemainder = transferLength % pEndpoint->TxCreditSize; 588 if (creditRemainder != 0) { 589 if (transferLength < pEndpoint->TxCreditSize) { 590 creditPad = pEndpoint->TxCreditSize - 591 transferLength; 592 } else { 593 creditPad = creditRemainder; 594 } 595 transferLength += creditPad; 596 } 597 598 if (bundlesSpaceRemaining < transferLength) { 599 htc_handle_extra_tx_credit(pEndpoint, p_last_htc_pkt, 600 p_last_pkt_bundle_buffer, 601 &pBundleBuffer, 602 pBundleBuffer - 603 qdf_nbuf_data(bundleBuf)); 604 605 /* send out previous buffer */ 606 htc_send_bundled_netbuf(target, pEndpoint, 607 pBundleBuffer - last_credit_pad, 608 pPacketTx); 609 /* One packet has been dequeued from sending queue when enter 610 * this loop, so need to add 1 back for this checking. 611 */ 612 if ((HTC_PACKET_QUEUE_DEPTH(pPktQueue) + 1) < 613 HTC_MIN_MSG_PER_BUNDLE) { 614 HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket); 615 return; 616 } 617 bundlesSpaceRemaining = 618 target->MaxMsgsPerHTCBundle * 619 pEndpoint->TxCreditSize; 620 pPacketTx = allocate_htc_bundle_packet(target); 621 if (!pPacketTx) { 622 HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket); 623 /* good time to panic */ 624 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 625 ("allocate_htc_bundle_packet failed\n")); 626 AR_DEBUG_ASSERT(false); 627 return; 628 } 629 bundleBuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacketTx); 630 pBundleBuffer = qdf_nbuf_data(bundleBuf); 631 pQueueSave = (HTC_PACKET_QUEUE *) pPacketTx->pContext; 632 } 633 634 p_last_htc_pkt = pPacket; 635 p_last_pkt_bundle_buffer = pBundleBuffer; 636 637 bundlesSpaceRemaining -= transferLength; 638 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 639 640 if (hif_get_bus_type(target->hif_dev) != QDF_BUS_TYPE_USB) { 641 pHtcHdr = (HTC_FRAME_HDR *)qdf_nbuf_get_frag_vaddr( 642 netbuf, 0); 643 HTC_WRITE32(pHtcHdr, 644 SM(pPacket->ActualLength, 645 HTC_FRAME_HDR_PAYLOADLEN) | 646 SM(pPacket->PktInfo.AsTx.SendFlags | 647 HTC_FLAGS_SEND_BUNDLE, 648 HTC_FRAME_HDR_FLAGS) | 649 SM(pPacket->Endpoint, 650 HTC_FRAME_HDR_ENDPOINTID)); 651 HTC_WRITE32((uint32_t *) pHtcHdr + 1, 652 SM(pPacket->PktInfo.AsTx.SeqNo, 653 HTC_FRAME_HDR_CONTROLBYTES1) | SM(creditPad, 654 HTC_FRAME_HDR_RESERVED)); 655 pHtcHdr->reserved = creditPad; 656 } 657 frag_count = qdf_nbuf_get_num_frags(netbuf); 658 nbytes = pPacket->ActualLength + HTC_HDR_LENGTH; 659 for (i = 0; i < frag_count && nbytes > 0; i++) { 660 int frag_len = qdf_nbuf_get_frag_len(netbuf, i); 661 unsigned char *frag_addr = 662 qdf_nbuf_get_frag_vaddr(netbuf, i); 663 if (frag_len > nbytes) 664 frag_len = nbytes; 665 qdf_mem_copy(pBundleBuffer, frag_addr, frag_len); 666 nbytes -= frag_len; 667 pBundleBuffer += frag_len; 668 } 669 HTC_PACKET_ENQUEUE(pQueueSave, pPacket); 670 pBundleBuffer += creditPad; 671 672 /* last one can't be packed. */ 673 if (hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_USB) 674 last_credit_pad = creditPad; 675 } 676 /* send out remaining buffer */ 677 if (pBundleBuffer != qdf_nbuf_data(bundleBuf)) { 678 htc_handle_extra_tx_credit(pEndpoint, p_last_htc_pkt, 679 p_last_pkt_bundle_buffer, 680 &pBundleBuffer, 681 pBundleBuffer - 682 qdf_nbuf_data(bundleBuf)); 683 684 htc_send_bundled_netbuf(target, pEndpoint, 685 pBundleBuffer - last_credit_pad, 686 pPacketTx); 687 } else { 688 free_htc_bundle_packet(target, pPacketTx); 689 } 690 } 691 #endif /* ENABLE_BUNDLE_TX */ 692 #else 693 static int htc_tx_pad_credit_avail(HTC_ENDPOINT *ep) 694 { 695 return 1; 696 } 697 698 bool htc_handle_extra_tx_credit(HTC_ENDPOINT *ep, 699 HTC_PACKET *p_last_htc_pkt, 700 unsigned char *p_last_pkt_bundle_buffer, 701 unsigned char **p_bundle_buffer, 702 int tot_data_len); 703 bool htc_handle_extra_tx_credit(HTC_ENDPOINT *ep, 704 HTC_PACKET *p_last_htc_pkt, 705 unsigned char *p_last_pkt_bundle_buffer, 706 unsigned char **p_bundle_buffer, 707 int tot_data_len) 708 { 709 return FALSE; 710 } 711 712 static void htc_issue_packets_bundle(HTC_TARGET *target, 713 HTC_ENDPOINT *pEndpoint, 714 HTC_PACKET_QUEUE *pPktQueue) 715 { 716 } 717 #endif 718 719 /** 720 * htc_issue_packets() - HTC function to send packets from a queue 721 * @target: HTC target on which packets need to be sent 722 * @pEndpoint: logical endpoint on which packets needs to be sent 723 * @pPktQueue: HTC packet queue containing the list of packets to be sent 724 * 725 * Return: QDF_STATUS_SUCCESS on success and error QDF status on failure 726 */ 727 static QDF_STATUS htc_issue_packets(HTC_TARGET *target, 728 HTC_ENDPOINT *pEndpoint, 729 HTC_PACKET_QUEUE *pPktQueue) 730 { 731 QDF_STATUS status = QDF_STATUS_SUCCESS; 732 qdf_nbuf_t netbuf; 733 HTC_PACKET *pPacket = NULL; 734 uint16_t payloadLen; 735 HTC_FRAME_HDR *pHtcHdr; 736 uint32_t data_attr = 0; 737 enum qdf_bus_type bus_type; 738 QDF_STATUS ret; 739 bool rt_put = false; 740 bool used_extra_tx_credit = false; 741 uint8_t *buf = NULL; 742 int (*update_ep_padding_credit)(void *, int); 743 void *ctx = NULL; 744 bool rt_put_in_resp; 745 int32_t sys_state = HIF_SYSTEM_PM_STATE_ON; 746 747 update_ep_padding_credit = 748 pEndpoint->EpCallBacks.ep_padding_credit_update; 749 750 bus_type = hif_get_bus_type(target->hif_dev); 751 752 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 753 ("+htc_issue_packets: Queue: %pK, Pkts %d\n", pPktQueue, 754 HTC_PACKET_QUEUE_DEPTH(pPktQueue))); 755 while (true) { 756 rt_put_in_resp = false; 757 if (HTC_TX_BUNDLE_ENABLED(target) && 758 HTC_PACKET_QUEUE_DEPTH(pPktQueue) >= 759 HTC_MIN_MSG_PER_BUNDLE) { 760 switch (bus_type) { 761 case QDF_BUS_TYPE_SDIO: 762 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) 763 break; 764 if (update_ep_padding_credit) { 765 if (htc_tx_pad_credit_avail 766 (pEndpoint) < 1) 767 break; 768 } 769 fallthrough; 770 case QDF_BUS_TYPE_USB: 771 htc_issue_packets_bundle(target, 772 pEndpoint, 773 pPktQueue); 774 break; 775 default: 776 break; 777 } 778 } 779 /* if not bundling or there was a packet that could not be 780 * placed in a bundle, and send it by normal way 781 */ 782 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 783 if (htc_tx_pad_credit_avail(pEndpoint) < 1) { 784 status = QDF_STATUS_E_FAILURE; 785 break; 786 } 787 } 788 789 pPacket = htc_packet_dequeue(pPktQueue); 790 if (!pPacket) { 791 /* local queue is fully drained */ 792 break; 793 } 794 795 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 796 AR_DEBUG_ASSERT(netbuf); 797 /* Non-credit enabled endpoints have been mapped and setup by 798 * now, so no need to revisit the HTC headers 799 */ 800 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 801 802 payloadLen = pPacket->ActualLength; 803 /* setup HTC frame header */ 804 805 pHtcHdr = (HTC_FRAME_HDR *) 806 qdf_nbuf_get_frag_vaddr(netbuf, 0); 807 if (qdf_unlikely(!pHtcHdr)) { 808 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 809 ("%s Invalid pHtcHdr\n", 810 __func__)); 811 AR_DEBUG_ASSERT(pHtcHdr); 812 status = QDF_STATUS_E_FAILURE; 813 break; 814 } 815 816 HTC_WRITE32(pHtcHdr, 817 SM(payloadLen, 818 HTC_FRAME_HDR_PAYLOADLEN) | 819 SM(pPacket->PktInfo.AsTx.SendFlags, 820 HTC_FRAME_HDR_FLAGS) | 821 SM(pPacket->Endpoint, 822 HTC_FRAME_HDR_ENDPOINTID)); 823 HTC_WRITE32(((uint32_t *) pHtcHdr) + 1, 824 SM(pPacket->PktInfo.AsTx.SeqNo, 825 HTC_FRAME_HDR_CONTROLBYTES1)); 826 827 /* 828 * Now that the HTC frame header has been added, the 829 * netbuf can be mapped. This only applies to non-data 830 * frames, since data frames were already mapped as they 831 * entered into the driver. 832 */ 833 ret = qdf_nbuf_map(target->osdev, 834 GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket), 835 QDF_DMA_TO_DEVICE); 836 if (ret != QDF_STATUS_SUCCESS) { 837 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 838 ("%s nbuf Map Fail Endpnt %pK\n", 839 __func__, pEndpoint)); 840 HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket); 841 status = QDF_STATUS_E_FAILURE; 842 break; 843 } 844 pPacket->PktInfo.AsTx.Flags |= 845 HTC_TX_PACKET_FLAG_FIXUP_NETBUF; 846 } 847 848 if (!pEndpoint->async_update) { 849 LOCK_HTC_TX(target); 850 } 851 /* store in look up queue to match completions */ 852 HTC_PACKET_ENQUEUE(&pEndpoint->TxLookupQueue, pPacket); 853 INC_HTC_EP_STAT(pEndpoint, TxIssued, 1); 854 pEndpoint->ul_outstanding_cnt++; 855 if (!pEndpoint->async_update) { 856 UNLOCK_HTC_TX(target); 857 hif_send_complete_check(target->hif_dev, 858 pEndpoint->UL_PipeID, false); 859 } 860 861 if (pPacket->PktInfo.AsTx.Tag == HTC_TX_PACKET_SYSTEM_SUSPEND) { 862 sys_state = hif_system_pm_get_state(target->hif_dev); 863 hif_system_pm_set_state_suspending(target->hif_dev); 864 } 865 866 htc_packet_set_magic_cookie(pPacket, HTC_PACKET_MAGIC_COOKIE); 867 /* 868 * For HTT messages without a response from fw, 869 * do the runtime put here. 870 * otherwise runtime put will be done when the fw response comes 871 */ 872 if (pPacket->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_RUNTIME_PUT) { 873 rt_put = true; 874 } else if (pPacket->PktInfo.AsTx.Tag == 875 HTC_TX_PACKET_TAG_RTPM_PUT_RC) { 876 rt_put_in_resp = true; 877 htc_inc_htt_runtime_cnt(target); 878 } 879 880 #if DEBUG_BUNDLE 881 qdf_print(" Send single EP%d buffer size:0x%x, total:0x%x.", 882 pEndpoint->Id, 883 pEndpoint->TxCreditSize, 884 HTC_HDR_LENGTH + pPacket->ActualLength); 885 #endif 886 buf = (uint8_t *)qdf_nbuf_get_frag_vaddr(netbuf, 0); 887 used_extra_tx_credit = 888 htc_handle_extra_tx_credit(pEndpoint, pPacket, buf, 889 NULL, pPacket->ActualLength + 890 HTC_HDR_LENGTH); 891 892 status = hif_send_head(target->hif_dev, 893 pEndpoint->UL_PipeID, pEndpoint->Id, 894 HTC_HDR_LENGTH + pPacket->ActualLength, 895 netbuf, data_attr); 896 897 if (status != QDF_STATUS_SUCCESS) { 898 if (rt_put_in_resp) 899 htc_dec_return_htt_runtime_cnt((void *)target); 900 901 if (pPacket->PktInfo.AsTx.Tag == 902 HTC_TX_PACKET_SYSTEM_SUSPEND) 903 __hif_system_pm_set_state(target->hif_dev, 904 sys_state); 905 906 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 907 if (used_extra_tx_credit) { 908 ctx = pEndpoint->EpCallBacks.pContext; 909 update_ep_padding_credit(ctx, 1); 910 } 911 } 912 } 913 914 htc_issue_tx_bundle_stats_inc(target); 915 916 target->ce_send_cnt++; 917 pEndpoint->htc_send_cnt++; 918 919 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 920 if (status != QDF_STATUS_E_RESOURCES) { 921 /* TODO : if more than 1 endpoint maps to the 922 * same PipeID it is possible to run out of 923 * resources in the HIF layer. Don't emit the 924 * error 925 */ 926 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 927 ("hif_send Failed status:%d\n", 928 status)); 929 } else { 930 if (target->htc_pkt_dbg) { 931 if (pEndpoint->num_requeues_warn > 932 MAX_REQUEUE_WARN) { 933 hif_print_napi_stats(target->hif_dev); 934 } 935 } 936 } 937 938 /* only unmap if we mapped in this function */ 939 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 940 qdf_nbuf_unmap(target->osdev, 941 GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket), 942 QDF_DMA_TO_DEVICE); 943 pPacket->PktInfo.AsTx.Flags &= 944 ~HTC_TX_PACKET_FLAG_FIXUP_NETBUF; 945 } 946 947 if (!pEndpoint->async_update) { 948 LOCK_HTC_TX(target); 949 } 950 target->ce_send_cnt--; 951 pEndpoint->htc_send_cnt--; 952 pEndpoint->ul_outstanding_cnt--; 953 HTC_PACKET_REMOVE(&pEndpoint->TxLookupQueue, pPacket); 954 htc_packet_set_magic_cookie(pPacket, 0); 955 /* put it back into the callers queue */ 956 HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket); 957 /* reclaim credits */ 958 HTC_PACKET_QUEUE_ITERATE_ALLOW_REMOVE(pPktQueue, 959 pPacket) { 960 pEndpoint->TxCredits += 961 pPacket->PktInfo.AsTx.CreditsUsed; 962 } HTC_PACKET_QUEUE_ITERATE_END; 963 if (!pEndpoint->async_update) { 964 UNLOCK_HTC_TX(target); 965 } 966 break; 967 } 968 if (rt_put) { 969 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, HIF_RTPM_ID_HTT); 970 rt_put = false; 971 } 972 } 973 974 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 975 if (((status == QDF_STATUS_E_RESOURCES) && 976 (pEndpoint->num_requeues_warn > MAX_REQUEUE_WARN)) || 977 (status != QDF_STATUS_E_RESOURCES)) { 978 QDF_TRACE(QDF_MODULE_ID_HIF, QDF_TRACE_LEVEL_INFO, 979 "failed pkt:0x%pK status:%d endpoint:%d", 980 pPacket, status, pEndpoint->Id); 981 } 982 983 } 984 985 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_issue_packets\n")); 986 987 return status; 988 } 989 990 #ifdef FEATURE_RUNTIME_PM 991 /** 992 * extract_htc_pm_packets() - move pm packets from endpoint into queue 993 * @endpoint: which endpoint to extract packets from 994 * @queue: a queue to store extracted packets in. 995 * 996 * remove pm packets from the endpoint's tx queue. 997 * queue them into a queue 998 */ 999 static void extract_htc_pm_packets(HTC_ENDPOINT *endpoint, 1000 HTC_PACKET_QUEUE *queue) 1001 { 1002 HTC_PACKET *packet; 1003 1004 /* only WMI endpoint has power management packets */ 1005 if (endpoint->service_id != WMI_CONTROL_SVC) 1006 return; 1007 1008 ITERATE_OVER_LIST_ALLOW_REMOVE(&endpoint->TxQueue.QueueHead, packet, 1009 HTC_PACKET, ListLink) { 1010 if (packet->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_AUTO_PM) { 1011 HTC_PACKET_REMOVE(&endpoint->TxQueue, packet); 1012 HTC_PACKET_ENQUEUE(queue, packet); 1013 } 1014 } ITERATE_END 1015 } 1016 1017 /** 1018 * queue_htc_pm_packets() - queue pm packets with priority 1019 * @endpoint: endpoint to queue packets to 1020 * @queue: queue of pm packets to enqueue 1021 * 1022 * suspend resume packets get special treatment & priority. 1023 * need to queue them at the front of the queue. 1024 */ 1025 static void queue_htc_pm_packets(HTC_ENDPOINT *endpoint, 1026 HTC_PACKET_QUEUE *queue) 1027 { 1028 if (endpoint->service_id != WMI_CONTROL_SVC) 1029 return; 1030 1031 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&endpoint->TxQueue, queue); 1032 } 1033 1034 /** 1035 * htc_dec_wmi_runtime_cnt: Decrement htc wmi runtime count 1036 * @target: HTC target 1037 * @rtpm_code: RTPM code 1038 * 1039 * Return: None 1040 */ 1041 static inline 1042 void htc_dec_wmi_runtime_cnt(HTC_TARGET *target, uint8_t rtpm_code) 1043 { 1044 if (rtpm_code == HIF_RTPM_ID_WMI) 1045 qdf_atomic_dec(&target->htc_wmi_runtime_cnt); 1046 } 1047 1048 /** 1049 * htc_inc_wmi_runtime_cnt: Increment htc wmi runtime count 1050 * @target: HTC target 1051 * @rtpm_code: RTPM code 1052 * 1053 * Return: None 1054 */ 1055 static inline 1056 void htc_inc_wmi_runtime_cnt(HTC_TARGET *target, uint8_t rtpm_code) 1057 { 1058 if (rtpm_code == HIF_RTPM_ID_WMI) 1059 qdf_atomic_inc(&target->htc_wmi_runtime_cnt); 1060 } 1061 #else 1062 static void extract_htc_pm_packets(HTC_ENDPOINT *endpoint, 1063 HTC_PACKET_QUEUE *queue) 1064 {} 1065 1066 static void queue_htc_pm_packets(HTC_ENDPOINT *endpoint, 1067 HTC_PACKET_QUEUE *queue) 1068 {} 1069 1070 static inline 1071 void htc_dec_wmi_runtime_cnt(HTC_TARGET *target, uint8_t rtpm_code) 1072 { 1073 } 1074 1075 static inline 1076 void htc_inc_wmi_runtime_cnt(HTC_TARGET *target, uint8_t rtpm_code) 1077 { 1078 } 1079 #endif 1080 1081 /** 1082 * htc_send_pkts_get_rtpm_id() - get runtime pm dbgid by service_id 1083 * @service_id: service for endpoint 1084 * 1085 * For service_id HTT_DATA_MSG_SVC, HTT message donot have a tx complete 1086 * from CE level, so they need runtime put which only can happen in fw 1087 * response. runtime put will happens at 2 ways. 1088 * 1 if packet tag HTC_TX_PACKET_TAG_RUNTIME_PUT, runtime put 1089 * will be just in htc_issue_packets. as such pkt doesn't have 1090 * a response from fw. 1091 * 2 other pkt must have a response from fw, it will be handled 1092 * by fw response using htc_pm_runtime_put. 1093 * 1094 * For other service_id, they have tx_completion from CE, so they will be 1095 * handled in htc_tx_completion_handler, except packet tag as 1096 * HTC_TX_PACKET_TAG_AUTO_PM, pm related wmi cmd don't need a runtime 1097 * put/get. 1098 * 1099 * 1100 * Return: rtpm id to trace who used it 1101 */ 1102 static unsigned int 1103 htc_send_pkts_get_rtpm_id(HTC_SERVICE_ID service_id) 1104 { 1105 if (service_id == HTT_DATA_MSG_SVC) 1106 return HIF_RTPM_ID_HTT; 1107 else 1108 return HIF_RTPM_ID_WMI; 1109 } 1110 1111 #ifdef SYSTEM_PM_CHECK 1112 /** 1113 * extract_htc_system_resume_pkts() - Move system pm resume packets from 1114 * endpoint into queue 1115 * @endpoint: which endpoint to extract packets from 1116 * @queue: a queue to store extracted packets in. 1117 * 1118 * Remove pm packets from the endpoint's tx queue and enqueue 1119 * them into a queue 1120 */ 1121 static void extract_htc_system_resume_pkts(HTC_ENDPOINT *endpoint, 1122 HTC_PACKET_QUEUE *queue) 1123 { 1124 HTC_PACKET *packet; 1125 1126 /* only WMI endpoint has power management packets */ 1127 if (endpoint->service_id != WMI_CONTROL_SVC) 1128 return; 1129 1130 ITERATE_OVER_LIST_ALLOW_REMOVE(&endpoint->TxQueue.QueueHead, packet, 1131 HTC_PACKET, ListLink) { 1132 if (packet->PktInfo.AsTx.Tag == HTC_TX_PACKET_SYSTEM_RESUME) { 1133 HTC_PACKET_REMOVE(&endpoint->TxQueue, packet); 1134 HTC_PACKET_ENQUEUE(queue, packet); 1135 } 1136 } ITERATE_END 1137 } 1138 #else 1139 static inline 1140 void extract_htc_system_resume_pkts(HTC_ENDPOINT *endpoint, 1141 HTC_PACKET_QUEUE *queue) 1142 { 1143 } 1144 #endif 1145 1146 /** 1147 * get_htc_send_packets_credit_based() - get packets based on available credits 1148 * @target: HTC target on which packets need to be sent 1149 * @pEndpoint: logical endpoint on which packets needs to be sent 1150 * @pQueue: HTC packet queue containing the list of packets to be sent 1151 * 1152 * Get HTC send packets from TX queue on an endpoint based on available credits. 1153 * The function moves the packets from TX queue of the endpoint to pQueue. 1154 * 1155 * Return: None 1156 */ 1157 static void get_htc_send_packets_credit_based(HTC_TARGET *target, 1158 HTC_ENDPOINT *pEndpoint, 1159 HTC_PACKET_QUEUE *pQueue) 1160 { 1161 int creditsRequired; 1162 int remainder; 1163 uint8_t sendFlags; 1164 HTC_PACKET *pPacket; 1165 unsigned int transferLength; 1166 HTC_PACKET_QUEUE *tx_queue; 1167 HTC_PACKET_QUEUE pm_queue; 1168 bool do_pm_get = false; 1169 unsigned int rtpm_code = 0; 1170 int ret; 1171 HTC_PACKET_QUEUE sys_pm_queue; 1172 bool sys_pm_check = false; 1173 1174 /*** NOTE : the TX lock is held when this function is called ***/ 1175 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1176 ("+get_htc_send_packets_credit_based\n")); 1177 1178 INIT_HTC_PACKET_QUEUE(&pm_queue); 1179 extract_htc_pm_packets(pEndpoint, &pm_queue); 1180 if (HTC_QUEUE_EMPTY(&pm_queue)) { 1181 do_pm_get = true; 1182 1183 INIT_HTC_PACKET_QUEUE(&sys_pm_queue); 1184 extract_htc_system_resume_pkts(pEndpoint, &sys_pm_queue); 1185 if (HTC_QUEUE_EMPTY(&sys_pm_queue)) { 1186 tx_queue = &pEndpoint->TxQueue; 1187 sys_pm_check = true; 1188 } else { 1189 tx_queue = &sys_pm_queue; 1190 } 1191 } else { 1192 tx_queue = &pm_queue; 1193 } 1194 1195 /* loop until we can grab as many packets out of the queue as we can */ 1196 while (true) { 1197 if (do_pm_get) { 1198 rtpm_code = htc_send_pkts_get_rtpm_id( 1199 pEndpoint->service_id); 1200 ret = hif_rtpm_get(HIF_RTPM_GET_ASYNC, rtpm_code); 1201 if (ret) { 1202 /* bus suspended, runtime resume issued */ 1203 QDF_ASSERT(HTC_PACKET_QUEUE_DEPTH(pQueue) == 0); 1204 pPacket = htc_get_pkt_at_head(tx_queue); 1205 if (!pPacket) 1206 break; 1207 log_packet_info(target, pPacket); 1208 break; 1209 } 1210 htc_inc_wmi_runtime_cnt(target, rtpm_code); 1211 } 1212 1213 sendFlags = 0; 1214 /* get packet at head, but don't remove it */ 1215 pPacket = htc_get_pkt_at_head(tx_queue); 1216 if (!pPacket) { 1217 if (do_pm_get) { 1218 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, rtpm_code); 1219 htc_dec_wmi_runtime_cnt(target, rtpm_code); 1220 } 1221 break; 1222 } 1223 1224 if (sys_pm_check && 1225 hif_system_pm_state_check(target->hif_dev)) { 1226 if (do_pm_get) { 1227 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, rtpm_code); 1228 htc_dec_wmi_runtime_cnt(target, rtpm_code); 1229 } 1230 break; 1231 } 1232 1233 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1234 (" Got head packet:%pK , Queue Depth: %d\n", 1235 pPacket, 1236 HTC_PACKET_QUEUE_DEPTH(tx_queue))); 1237 1238 transferLength = pPacket->ActualLength + HTC_HDR_LENGTH; 1239 1240 if (transferLength <= pEndpoint->TxCreditSize) { 1241 creditsRequired = 1; 1242 } else { 1243 /* figure out how many credits this message requires */ 1244 creditsRequired = 1245 transferLength / pEndpoint->TxCreditSize; 1246 remainder = transferLength % pEndpoint->TxCreditSize; 1247 1248 if (remainder) 1249 creditsRequired++; 1250 } 1251 1252 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1253 (" Credits Required:%d Got:%d\n", 1254 creditsRequired, pEndpoint->TxCredits)); 1255 1256 if (pEndpoint->Id == ENDPOINT_0) { 1257 /* 1258 * endpoint 0 is special, it always has a credit and 1259 * does not require credit based flow control 1260 */ 1261 creditsRequired = 0; 1262 } else { 1263 1264 if (pEndpoint->TxCredits < creditsRequired) { 1265 #if DEBUG_CREDIT 1266 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1267 ("EP%d,No Credit now.%d < %d\n", 1268 pEndpoint->Id, 1269 pEndpoint->TxCredits, 1270 creditsRequired)); 1271 #endif 1272 if (do_pm_get) { 1273 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, 1274 rtpm_code); 1275 htc_dec_wmi_runtime_cnt(target, 1276 rtpm_code); 1277 } 1278 1279 break; 1280 } 1281 1282 pEndpoint->TxCredits -= creditsRequired; 1283 INC_HTC_EP_STAT(pEndpoint, TxCreditsConsummed, 1284 creditsRequired); 1285 1286 /* check if we need credits back from the target */ 1287 if (pEndpoint->TxCredits <= 1288 pEndpoint->TxCreditsPerMaxMsg) { 1289 /* tell the target we need credits ASAP! */ 1290 sendFlags |= HTC_FLAGS_NEED_CREDIT_UPDATE; 1291 if (pEndpoint->service_id == WMI_CONTROL_SVC) { 1292 htc_credit_record(HTC_REQUEST_CREDIT, 1293 pEndpoint->TxCredits, 1294 HTC_PACKET_QUEUE_DEPTH 1295 (tx_queue)); 1296 hif_latency_detect_credit_record_time( 1297 HIF_REQUEST_CREDIT, 1298 target->hif_dev); 1299 } 1300 INC_HTC_EP_STAT(pEndpoint, 1301 TxCreditLowIndications, 1); 1302 #if DEBUG_CREDIT 1303 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1304 (" EP%d Needs Credits\n", 1305 pEndpoint->Id)); 1306 #endif 1307 } 1308 } 1309 1310 /* now we can fully dequeue */ 1311 pPacket = htc_packet_dequeue(tx_queue); 1312 if (pPacket) { 1313 /* save the number of credits this packet consumed */ 1314 pPacket->PktInfo.AsTx.CreditsUsed = creditsRequired; 1315 /* save send flags */ 1316 pPacket->PktInfo.AsTx.SendFlags = sendFlags; 1317 1318 /* queue this packet into the caller's queue */ 1319 HTC_PACKET_ENQUEUE(pQueue, pPacket); 1320 } 1321 } 1322 1323 if (!HTC_QUEUE_EMPTY(&pm_queue)) 1324 queue_htc_pm_packets(pEndpoint, &pm_queue); 1325 1326 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1327 ("-get_htc_send_packets_credit_based\n")); 1328 1329 } 1330 1331 static void get_htc_send_packets(HTC_TARGET *target, 1332 HTC_ENDPOINT *pEndpoint, 1333 HTC_PACKET_QUEUE *pQueue, int Resources) 1334 { 1335 1336 HTC_PACKET *pPacket; 1337 HTC_PACKET_QUEUE *tx_queue; 1338 HTC_PACKET_QUEUE pm_queue; 1339 bool do_pm_get = false; 1340 unsigned int rtpm_code = 0; 1341 int ret; 1342 1343 /*** NOTE : the TX lock is held when this function is called ***/ 1344 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1345 ("+get_htc_send_packets %d resources\n", Resources)); 1346 1347 INIT_HTC_PACKET_QUEUE(&pm_queue); 1348 extract_htc_pm_packets(pEndpoint, &pm_queue); 1349 if (HTC_QUEUE_EMPTY(&pm_queue)) { 1350 tx_queue = &pEndpoint->TxQueue; 1351 do_pm_get = true; 1352 } else { 1353 tx_queue = &pm_queue; 1354 } 1355 1356 /* loop until we can grab as many packets out of the queue as we can */ 1357 while (Resources > 0) { 1358 int num_frags; 1359 1360 if (do_pm_get) { 1361 rtpm_code = 1362 htc_send_pkts_get_rtpm_id( 1363 pEndpoint->service_id); 1364 ret = hif_rtpm_get(HIF_RTPM_GET_ASYNC, rtpm_code); 1365 if (ret) { 1366 /* bus suspended, runtime resume issued */ 1367 QDF_ASSERT(HTC_PACKET_QUEUE_DEPTH(pQueue) == 0); 1368 pPacket = htc_get_pkt_at_head(tx_queue); 1369 if (!pPacket) 1370 break; 1371 log_packet_info(target, pPacket); 1372 break; 1373 } 1374 htc_inc_wmi_runtime_cnt(target, rtpm_code); 1375 1376 } 1377 1378 ret = hif_system_pm_state_check(target->hif_dev); 1379 if (ret) { 1380 if (do_pm_get) { 1381 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, rtpm_code); 1382 htc_dec_wmi_runtime_cnt(target, rtpm_code); 1383 } 1384 break; 1385 } 1386 1387 pPacket = htc_packet_dequeue(tx_queue); 1388 if (!pPacket) { 1389 if (do_pm_get) { 1390 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, rtpm_code); 1391 htc_dec_wmi_runtime_cnt(target, rtpm_code); 1392 } 1393 break; 1394 } 1395 1396 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1397 (" Got packet:%pK , New Queue Depth: %d\n", 1398 pPacket, 1399 HTC_PACKET_QUEUE_DEPTH(tx_queue))); 1400 /* For non-credit path the sequence number is already embedded 1401 * in the constructed HTC header 1402 */ 1403 pPacket->PktInfo.AsTx.SendFlags = 0; 1404 pPacket->PktInfo.AsTx.CreditsUsed = 0; 1405 /* queue this packet into the caller's queue */ 1406 HTC_PACKET_ENQUEUE(pQueue, pPacket); 1407 1408 /* 1409 * FIX THIS: 1410 * For now, avoid calling qdf_nbuf_get_num_frags before calling 1411 * qdf_nbuf_map, because the MacOS version of qdf_nbuf_t doesn't 1412 * support qdf_nbuf_get_num_frags until after qdf_nbuf_map has 1413 * been done. 1414 * Assume that the non-data netbufs, i.e. WMI message netbufs, 1415 * consist of a single fragment. 1416 */ 1417 /* WMI messages are in a single-fragment network buf */ 1418 num_frags = 1419 (pPacket->PktInfo.AsTx. 1420 Flags & HTC_TX_PACKET_FLAG_FIXUP_NETBUF) ? 1 : 1421 qdf_nbuf_get_num_frags(GET_HTC_PACKET_NET_BUF_CONTEXT 1422 (pPacket)); 1423 Resources -= num_frags; 1424 } 1425 1426 if (!HTC_QUEUE_EMPTY(&pm_queue)) 1427 queue_htc_pm_packets(pEndpoint, &pm_queue); 1428 1429 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-get_htc_send_packets\n")); 1430 1431 } 1432 1433 /** 1434 * htc_try_send() - Send packets in a queue on an endpoint 1435 * @target: HTC target on which packets need to be sent 1436 * @pEndpoint: logical endpoint on which packets needs to be sent 1437 * @pCallersSendQueue: packet queue containing the list of packets to be sent 1438 * 1439 * Return: enum HTC_SEND_QUEUE_RESULT indicates whether the packet was queued to 1440 * be sent or the packet should be dropped by the upper layer 1441 */ 1442 static enum HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target, 1443 HTC_ENDPOINT *pEndpoint, 1444 HTC_PACKET_QUEUE *pCallersSendQueue) 1445 { 1446 /* temp queue to hold packets at various stages */ 1447 HTC_PACKET_QUEUE sendQueue; 1448 HTC_PACKET *pPacket; 1449 int tx_resources; 1450 int overflow; 1451 enum HTC_SEND_QUEUE_RESULT result = HTC_SEND_QUEUE_OK; 1452 QDF_STATUS status; 1453 1454 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("+htc_try_send (Queue:%pK Depth:%d)\n", 1455 pCallersSendQueue, 1456 (pCallersSendQueue == 1457 NULL) ? 0 : 1458 HTC_PACKET_QUEUE_DEPTH 1459 (pCallersSendQueue))); 1460 1461 /* init the local send queue */ 1462 INIT_HTC_PACKET_QUEUE(&sendQueue); 1463 1464 do { 1465 1466 /* caller didn't provide a queue, just wants us to check 1467 * queues and send 1468 */ 1469 if (!pCallersSendQueue) 1470 break; 1471 1472 if (HTC_QUEUE_EMPTY(pCallersSendQueue)) { 1473 /* empty queue */ 1474 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, 1475 HTC_PKT_Q_EMPTY); 1476 result = HTC_SEND_QUEUE_DROP; 1477 break; 1478 } 1479 1480 if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) >= 1481 pEndpoint->MaxTxQueueDepth) { 1482 /* we've already overflowed */ 1483 overflow = HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue); 1484 } else { 1485 /* figure out how much we will overflow by */ 1486 overflow = HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue); 1487 overflow += HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue); 1488 /* get how much we will overflow the TX queue by */ 1489 overflow -= pEndpoint->MaxTxQueueDepth; 1490 } 1491 1492 /* if overflow is negative or zero, we are okay */ 1493 if (overflow > 0) { 1494 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1495 ("Endpoint %d, TX queue will overflow :%d , Tx Depth:%d, Max:%d\n", 1496 pEndpoint->Id, overflow, 1497 HTC_PACKET_QUEUE_DEPTH(&pEndpoint-> 1498 TxQueue), 1499 pEndpoint->MaxTxQueueDepth)); 1500 } 1501 if ((overflow <= 0) 1502 || (!pEndpoint->EpCallBacks.EpSendFull)) { 1503 /* all packets will fit or caller did not provide send 1504 * full indication handler 1505 * just move all of them to local sendQueue object 1506 */ 1507 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&sendQueue, 1508 pCallersSendQueue); 1509 } else { 1510 int i; 1511 int goodPkts = 1512 HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue) - 1513 overflow; 1514 1515 A_ASSERT(goodPkts >= 0); 1516 /* we have overflowed and callback is provided. Dequeue 1517 * all non-overflow packets into the sendqueue 1518 */ 1519 for (i = 0; i < goodPkts; i++) { 1520 /* pop off caller's queue */ 1521 pPacket = htc_packet_dequeue(pCallersSendQueue); 1522 A_ASSERT(pPacket); 1523 if (pPacket) 1524 /* insert into local queue */ 1525 HTC_PACKET_ENQUEUE(&sendQueue, 1526 pPacket); 1527 } 1528 1529 /* the caller's queue has all the packets that won't fit 1530 * walk through the caller's queue and indicate each one 1531 * to the send full handler 1532 */ 1533 ITERATE_OVER_LIST_ALLOW_REMOVE(&pCallersSendQueue-> 1534 QueueHead, pPacket, 1535 HTC_PACKET, ListLink) { 1536 1537 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1538 ("Indicating overflowed TX packet: %pK\n", 1539 pPacket)); 1540 /* 1541 * Remove headroom reserved for HTC_FRAME_HDR 1542 * before giving the packet back to the user via 1543 * the EpSendFull callback. 1544 */ 1545 qdf_nbuf_pull_head 1546 (GET_HTC_PACKET_NET_BUF_CONTEXT 1547 (pPacket), 1548 sizeof(HTC_FRAME_HDR)); 1549 pPacket->PktInfo.AsTx.Flags &= 1550 ~HTC_TX_PACKET_FLAG_HTC_HEADER_IN_NETBUF_DATA; 1551 1552 if (pEndpoint->EpCallBacks. 1553 EpSendFull(pEndpoint->EpCallBacks.pContext, 1554 pPacket) == HTC_SEND_FULL_DROP) { 1555 /* callback wants the packet dropped */ 1556 INC_HTC_EP_STAT(pEndpoint, TxDropped, 1557 1); 1558 /* leave this one in the caller's queue 1559 * for cleanup 1560 */ 1561 } else { 1562 /* callback wants to keep this packet, 1563 * remove from caller's queue 1564 */ 1565 HTC_PACKET_REMOVE(pCallersSendQueue, 1566 pPacket); 1567 /* put it in the send queue 1568 * add HTC_FRAME_HDR space reservation 1569 * again 1570 */ 1571 qdf_nbuf_push_head 1572 (GET_HTC_PACKET_NET_BUF_CONTEXT 1573 (pPacket), 1574 sizeof(HTC_FRAME_HDR)); 1575 pPacket->PktInfo.AsTx.Flags |= 1576 HTC_TX_PACKET_FLAG_HTC_HEADER_IN_NETBUF_DATA; 1577 1578 HTC_PACKET_ENQUEUE(&sendQueue, pPacket); 1579 } 1580 1581 } 1582 ITERATE_END; 1583 1584 if (HTC_QUEUE_EMPTY(&sendQueue)) { 1585 /* no packets made it in, caller will cleanup */ 1586 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, 1587 HTC_SEND_Q_EMPTY); 1588 result = HTC_SEND_QUEUE_DROP; 1589 break; 1590 } 1591 } 1592 1593 } while (false); 1594 1595 if (result != HTC_SEND_QUEUE_OK) { 1596 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send: %d\n", 1597 result)); 1598 return result; 1599 } 1600 1601 LOCK_HTC_TX(target); 1602 1603 if (!HTC_QUEUE_EMPTY(&sendQueue)) { 1604 if (target->is_nodrop_pkt) { 1605 /* 1606 * nodrop pkts have higher priority than normal pkts, 1607 * insert nodrop pkt to head for proper 1608 * start/termination of test. 1609 */ 1610 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 1611 &sendQueue); 1612 target->is_nodrop_pkt = false; 1613 } else { 1614 /* transfer packets to tail */ 1615 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&pEndpoint->TxQueue, 1616 &sendQueue); 1617 A_ASSERT(HTC_QUEUE_EMPTY(&sendQueue)); 1618 INIT_HTC_PACKET_QUEUE(&sendQueue); 1619 } 1620 } 1621 1622 /* increment tx processing count on entry */ 1623 if (qdf_atomic_inc_return(&pEndpoint->TxProcessCount) > 1) { 1624 /* another thread or task is draining the TX queues on this 1625 * endpoint that thread will reset the tx processing count when 1626 * the queue is drained 1627 */ 1628 qdf_atomic_dec(&pEndpoint->TxProcessCount); 1629 UNLOCK_HTC_TX(target); 1630 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send (busy)\n")); 1631 return HTC_SEND_QUEUE_OK; 1632 } 1633 1634 /***** beyond this point only 1 thread may enter ******/ 1635 1636 /* now drain the endpoint TX queue for transmission as long as we have 1637 * enough transmit resources 1638 */ 1639 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1640 tx_resources = 1641 hif_get_free_queue_number(target->hif_dev, 1642 pEndpoint->UL_PipeID); 1643 } else { 1644 tx_resources = 0; 1645 } 1646 1647 while (true) { 1648 1649 if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) == 0) 1650 break; 1651 1652 if (pEndpoint->async_update && 1653 (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) && 1654 (!tx_resources)) { 1655 hif_schedule_ce_tasklet(target->hif_dev, 1656 pEndpoint->UL_PipeID); 1657 break; 1658 } 1659 1660 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1661 #if DEBUG_CREDIT 1662 int cred = pEndpoint->TxCredits; 1663 #endif 1664 /* credit based mechanism provides flow control based on 1665 * target transmit resource availability, we assume that 1666 * the HIF layer will always have bus resources greater 1667 * than target transmit resources 1668 */ 1669 get_htc_send_packets_credit_based(target, pEndpoint, 1670 &sendQueue); 1671 #if DEBUG_CREDIT 1672 if (ep_debug_mask & (1 << pEndpoint->Id)) { 1673 if (cred - pEndpoint->TxCredits > 0) { 1674 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1675 (" <HTC> Decrease EP%d %d - %d = %d credits.\n", 1676 pEndpoint->Id, cred, 1677 cred - 1678 pEndpoint->TxCredits, 1679 pEndpoint->TxCredits)); 1680 } 1681 } 1682 #endif 1683 } else { 1684 1685 /* 1686 * Header and payload belongs to the different fragments and 1687 * consume 2 resource for one HTC package but USB combine into 1688 * one transfer.And one WMI message only consumes one single 1689 * resource. 1690 */ 1691 if (HTC_TX_BUNDLE_ENABLED(target) && tx_resources && 1692 hif_get_bus_type(target->hif_dev) == 1693 QDF_BUS_TYPE_USB) { 1694 if (pEndpoint->service_id == 1695 WMI_CONTROL_SVC) 1696 tx_resources = 1697 HTC_MAX_MSG_PER_BUNDLE_TX; 1698 else 1699 tx_resources = 1700 (HTC_MAX_MSG_PER_BUNDLE_TX * 2); 1701 } 1702 /* get all the packets for this endpoint that we can for 1703 * this pass 1704 */ 1705 get_htc_send_packets(target, pEndpoint, &sendQueue, 1706 tx_resources); 1707 } 1708 1709 if (HTC_PACKET_QUEUE_DEPTH(&sendQueue) == 0) { 1710 /* didn't get any packets due to a lack of resources or 1711 * TX queue was drained 1712 */ 1713 break; 1714 } 1715 1716 if (!pEndpoint->async_update) 1717 UNLOCK_HTC_TX(target); 1718 1719 /* send what we can */ 1720 status = htc_issue_packets(target, pEndpoint, &sendQueue); 1721 if (status) { 1722 int i; 1723 unsigned int rtpm_code; 1724 1725 result = HTC_SEND_QUEUE_DROP; 1726 1727 switch (status) { 1728 case QDF_STATUS_E_RESOURCES: 1729 if (pEndpoint->num_requeues_warn <= MAX_REQUEUE_WARN) { 1730 pEndpoint->num_requeues_warn++; 1731 pEndpoint->total_num_requeues++; 1732 break; 1733 } else { 1734 pEndpoint->total_num_requeues++; 1735 pEndpoint->num_requeues_warn = 0; 1736 } 1737 fallthrough; 1738 default: 1739 QDF_TRACE(QDF_MODULE_ID_HIF, QDF_TRACE_LEVEL_INFO, 1740 "htc_issue_packets, failed status:%d" 1741 "endpoint:%d, put it back to head of" 1742 "callersSendQueue", result, pEndpoint->Id); 1743 break; 1744 } 1745 1746 rtpm_code = htc_send_pkts_get_rtpm_id( 1747 pEndpoint->service_id); 1748 for (i = HTC_PACKET_QUEUE_DEPTH(&sendQueue); i > 0; i--) { 1749 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, rtpm_code); 1750 htc_dec_wmi_runtime_cnt(target, rtpm_code); 1751 } 1752 1753 if (!pEndpoint->async_update) { 1754 LOCK_HTC_TX(target); 1755 } 1756 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 1757 &sendQueue); 1758 break; 1759 } else { 1760 if (pEndpoint->num_requeues_warn) 1761 pEndpoint->num_requeues_warn = 0; 1762 } 1763 1764 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1765 tx_resources = 1766 hif_get_free_queue_number(target->hif_dev, 1767 pEndpoint->UL_PipeID); 1768 } 1769 1770 if (!pEndpoint->async_update) { 1771 LOCK_HTC_TX(target); 1772 } 1773 1774 } 1775 1776 /* done with this endpoint, we can clear the count */ 1777 qdf_atomic_init(&pEndpoint->TxProcessCount); 1778 1779 UNLOCK_HTC_TX(target); 1780 1781 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send:\n")); 1782 1783 return HTC_SEND_QUEUE_OK; 1784 } 1785 1786 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 1787 static uint16_t htc_send_pkts_sched_check(HTC_HANDLE HTCHandle, 1788 HTC_ENDPOINT_ID id) 1789 { 1790 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1791 HTC_ENDPOINT *pEndpoint; 1792 HTC_ENDPOINT_ID eid; 1793 HTC_PACKET_QUEUE *pTxQueue; 1794 uint16_t resources; 1795 uint16_t acQueueStatus[DATA_EP_SIZE] = { 0, 0, 0, 0 }; 1796 1797 if (id < ENDPOINT_2 || id > ENDPOINT_5) 1798 return 1; 1799 1800 for (eid = ENDPOINT_2; eid <= ENDPOINT_5; eid++) { 1801 pEndpoint = &target->endpoint[eid]; 1802 pTxQueue = &pEndpoint->TxQueue; 1803 1804 if (HTC_QUEUE_EMPTY(pTxQueue)) 1805 acQueueStatus[eid - 2] = 1; 1806 } 1807 1808 switch (id) { 1809 case ENDPOINT_2: /* BE */ 1810 return acQueueStatus[0] && acQueueStatus[2] 1811 && acQueueStatus[3]; 1812 case ENDPOINT_3: /* BK */ 1813 return acQueueStatus[0] && acQueueStatus[1] && acQueueStatus[2] 1814 && acQueueStatus[3]; 1815 case ENDPOINT_4: /* VI */ 1816 return acQueueStatus[2] && acQueueStatus[3]; 1817 case ENDPOINT_5: /* VO */ 1818 return acQueueStatus[3]; 1819 default: 1820 return 0; 1821 } 1822 1823 } 1824 1825 static A_STATUS htc_send_pkts_sched_queue(HTC_TARGET *target, 1826 HTC_PACKET_QUEUE *pPktQueue, 1827 HTC_ENDPOINT_ID eid) 1828 { 1829 HTC_ENDPOINT *pEndpoint; 1830 HTC_PACKET_QUEUE *pTxQueue; 1831 HTC_PACKET *pPacket; 1832 int goodPkts; 1833 1834 pEndpoint = &target->endpoint[eid]; 1835 pTxQueue = &pEndpoint->TxQueue; 1836 1837 LOCK_HTC_TX(target); 1838 1839 goodPkts = 1840 pEndpoint->MaxTxQueueDepth - 1841 HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue); 1842 1843 if (goodPkts > 0) { 1844 while (!HTC_QUEUE_EMPTY(pPktQueue)) { 1845 pPacket = htc_packet_dequeue(pPktQueue); 1846 HTC_PACKET_ENQUEUE(pTxQueue, pPacket); 1847 goodPkts--; 1848 1849 if (goodPkts <= 0) 1850 break; 1851 } 1852 } 1853 1854 if (HTC_PACKET_QUEUE_DEPTH(pPktQueue)) { 1855 ITERATE_OVER_LIST_ALLOW_REMOVE(&pPktQueue->QueueHead, pPacket, 1856 HTC_PACKET, ListLink) { 1857 1858 if (pEndpoint->EpCallBacks. 1859 EpSendFull(pEndpoint->EpCallBacks.pContext, 1860 pPacket) == HTC_SEND_FULL_DROP) { 1861 INC_HTC_EP_STAT(pEndpoint, TxDropped, 1); 1862 } else { 1863 HTC_PACKET_REMOVE(pPktQueue, pPacket); 1864 HTC_PACKET_ENQUEUE(pTxQueue, pPacket); 1865 } 1866 } 1867 ITERATE_END; 1868 } 1869 1870 UNLOCK_HTC_TX(target); 1871 1872 return A_OK; 1873 } 1874 1875 #endif 1876 1877 static inline QDF_STATUS __htc_send_pkt(HTC_HANDLE HTCHandle, 1878 HTC_PACKET *pPacket) 1879 { 1880 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1881 HTC_ENDPOINT *pEndpoint; 1882 HTC_PACKET_QUEUE pPktQueue; 1883 qdf_nbuf_t netbuf; 1884 HTC_FRAME_HDR *htc_hdr; 1885 QDF_STATUS status; 1886 1887 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1888 ("+__htc_send_pkt\n")); 1889 1890 /* get packet at head to figure out which endpoint these packets will 1891 * go into 1892 */ 1893 if (!pPacket) { 1894 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, GET_HTC_PKT_Q_FAIL); 1895 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-__htc_send_pkt\n")); 1896 return QDF_STATUS_E_INVAL; 1897 } 1898 1899 if ((pPacket->Endpoint >= ENDPOINT_MAX) || 1900 (pPacket->Endpoint <= ENDPOINT_UNUSED)) { 1901 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1902 ("%s endpoint is invalid\n", __func__)); 1903 AR_DEBUG_ASSERT(0); 1904 return QDF_STATUS_E_INVAL; 1905 } 1906 pEndpoint = &target->endpoint[pPacket->Endpoint]; 1907 1908 if (!pEndpoint->service_id) { 1909 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("%s service_id is invalid\n", 1910 __func__)); 1911 return QDF_STATUS_E_INVAL; 1912 } 1913 1914 #ifdef HTC_EP_STAT_PROFILING 1915 LOCK_HTC_TX(target); 1916 INC_HTC_EP_STAT(pEndpoint, TxPosted, 1); 1917 UNLOCK_HTC_TX(target); 1918 #endif 1919 1920 /* provide room in each packet's netbuf for the HTC frame header */ 1921 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 1922 AR_DEBUG_ASSERT(netbuf); 1923 if (!netbuf) 1924 return QDF_STATUS_E_INVAL; 1925 1926 qdf_nbuf_push_head(netbuf, sizeof(HTC_FRAME_HDR)); 1927 pPacket->PktInfo.AsTx.Flags |= 1928 HTC_TX_PACKET_FLAG_HTC_HEADER_IN_NETBUF_DATA; 1929 /* setup HTC frame header */ 1930 htc_hdr = (HTC_FRAME_HDR *)qdf_nbuf_get_frag_vaddr(netbuf, 0); 1931 AR_DEBUG_ASSERT(htc_hdr); 1932 if (!htc_hdr) 1933 return QDF_STATUS_E_INVAL; 1934 1935 HTC_WRITE32(htc_hdr, 1936 SM(pPacket->ActualLength, 1937 HTC_FRAME_HDR_PAYLOADLEN) | 1938 SM(pPacket->Endpoint, 1939 HTC_FRAME_HDR_ENDPOINTID)); 1940 LOCK_HTC_TX(target); 1941 1942 pPacket->PktInfo.AsTx.SeqNo = pEndpoint->SeqNo; 1943 pEndpoint->SeqNo++; 1944 1945 HTC_WRITE32(((uint32_t *)htc_hdr) + 1, 1946 SM(pPacket->PktInfo.AsTx.SeqNo, 1947 HTC_FRAME_HDR_CONTROLBYTES1)); 1948 1949 UNLOCK_HTC_TX(target); 1950 1951 /* 1952 * For flow control enabled endpoints mapping is done in 1953 * htc_issue_packets and for non flow control enabled endpoints 1954 * its done here. 1955 */ 1956 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1957 pPacket->PktInfo.AsTx.Flags |= HTC_TX_PACKET_FLAG_FIXUP_NETBUF; 1958 status = qdf_nbuf_map(target->osdev, 1959 GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket), 1960 QDF_DMA_TO_DEVICE); 1961 if (status == QDF_STATUS_SUCCESS) { 1962 target->nbuf_nfc_map_count++; 1963 } else { 1964 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1965 ("%s: nbuf map failed, endpoint %pK, seq_no. %d\n", 1966 __func__, pEndpoint, pEndpoint->SeqNo)); 1967 return status; 1968 } 1969 } 1970 1971 INIT_HTC_PACKET_QUEUE_AND_ADD(&pPktQueue, pPacket); 1972 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 1973 if (!htc_send_pkts_sched_check(HTCHandle, pEndpoint->Id)) 1974 htc_send_pkts_sched_queue(HTCHandle, &pPktQueue, pEndpoint->Id); 1975 else 1976 htc_try_send(target, pEndpoint, &pPktQueue); 1977 #else 1978 htc_try_send(target, pEndpoint, &pPktQueue); 1979 #endif 1980 1981 /* do completion on any packets that couldn't get in */ 1982 while (!HTC_QUEUE_EMPTY(&pPktQueue)) { 1983 pPacket = htc_packet_dequeue(&pPktQueue); 1984 1985 if (HTC_STOPPING(target)) 1986 pPacket->Status = QDF_STATUS_E_CANCELED; 1987 else 1988 pPacket->Status = QDF_STATUS_E_RESOURCES; 1989 1990 send_packet_completion(target, pPacket); 1991 } 1992 1993 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-__htc_send_pkt\n")); 1994 1995 return QDF_STATUS_SUCCESS; 1996 } 1997 1998 /* HTC API - htc_send_pkt */ 1999 QDF_STATUS htc_send_pkt(HTC_HANDLE htc_handle, HTC_PACKET *htc_packet) 2000 { 2001 if (!htc_handle) { 2002 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2003 ("%s: HTCHandle is NULL \n", __func__)); 2004 return QDF_STATUS_E_FAILURE; 2005 } 2006 2007 if (!htc_packet) { 2008 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2009 ("%s: pPacket is NULL \n", __func__)); 2010 return QDF_STATUS_E_FAILURE; 2011 } 2012 2013 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2014 ("+-htc_send_pkt: Enter endPointId: %d, buffer: %pK, length: %d\n", 2015 htc_packet->Endpoint, htc_packet->pBuffer, 2016 htc_packet->ActualLength)); 2017 return __htc_send_pkt(htc_handle, htc_packet); 2018 } 2019 qdf_export_symbol(htc_send_pkt); 2020 2021 #ifdef ATH_11AC_TXCOMPACT 2022 /** 2023 * htc_send_data_pkt() - send single data packet on an endpoint 2024 * @htc_hdl: pointer to HTC handle 2025 * @netbuf: network buffer containing the data to be sent 2026 * @ep_id: endpoint identifier 2027 * @actual_length: length of data that needs to be transmitted 2028 * 2029 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 2030 */ 2031 QDF_STATUS htc_send_data_pkt(HTC_HANDLE htc_hdl, qdf_nbuf_t netbuf, int ep_id, 2032 int actual_length) 2033 { 2034 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc_hdl); 2035 HTC_ENDPOINT *pEndpoint; 2036 HTC_FRAME_HDR *p_htc_hdr; 2037 QDF_STATUS status = QDF_STATUS_SUCCESS; 2038 int tx_resources; 2039 uint32_t data_attr = 0; 2040 int htc_payload_len = actual_length; 2041 unsigned int rtpm_code; 2042 2043 pEndpoint = &target->endpoint[ep_id]; 2044 2045 tx_resources = hif_get_free_queue_number(target->hif_dev, 2046 pEndpoint->UL_PipeID); 2047 2048 if (tx_resources < HTC_DATA_RESOURCE_THRS) { 2049 if (pEndpoint->ul_is_polled) { 2050 hif_send_complete_check(pEndpoint->target->hif_dev, 2051 pEndpoint->UL_PipeID, 1); 2052 tx_resources = 2053 hif_get_free_queue_number(target->hif_dev, 2054 pEndpoint->UL_PipeID); 2055 } 2056 if (tx_resources < HTC_DATA_MINDESC_PERPACKET) 2057 return QDF_STATUS_E_FAILURE; 2058 } 2059 2060 rtpm_code = htc_send_pkts_get_rtpm_id( 2061 pEndpoint->service_id); 2062 if (hif_rtpm_get(HIF_RTPM_GET_ASYNC, rtpm_code)) 2063 return QDF_STATUS_E_FAILURE; 2064 2065 p_htc_hdr = (HTC_FRAME_HDR *)qdf_nbuf_get_frag_vaddr(netbuf, 0); 2066 AR_DEBUG_ASSERT(p_htc_hdr); 2067 2068 data_attr = qdf_nbuf_data_attr_get(netbuf); 2069 2070 if (target->htc_hdr_length_check) 2071 htc_payload_len = actual_length - HTC_HEADER_LEN; 2072 2073 HTC_WRITE32(p_htc_hdr, SM(htc_payload_len, HTC_FRAME_HDR_PAYLOADLEN) 2074 | SM(ep_id, HTC_FRAME_HDR_ENDPOINTID)); 2075 /* 2076 * If the HIF pipe for the data endpoint is polled rather than 2077 * interrupt-driven, this is a good point to check whether any 2078 * data previously sent through the HIF pipe have finished being 2079 * sent. 2080 * Since this may result in callbacks to htc_tx_completion_handler, 2081 * which can take the HTC tx lock, make the hif_send_complete_check 2082 * call before acquiring the HTC tx lock. 2083 * Call hif_send_complete_check directly, rather than calling 2084 * htc_send_complete_check, and call the PollTimerStart separately 2085 * after calling hif_send_head, so the timer will be started to 2086 * check for completion of the new outstanding download (in the 2087 * unexpected event that other polling calls don't catch it). 2088 */ 2089 2090 LOCK_HTC_TX(target); 2091 2092 HTC_WRITE32(((uint32_t *)p_htc_hdr) + 1, 2093 SM(pEndpoint->SeqNo, HTC_FRAME_HDR_CONTROLBYTES1)); 2094 2095 pEndpoint->SeqNo++; 2096 2097 QDF_NBUF_UPDATE_TX_PKT_COUNT(netbuf, QDF_NBUF_TX_PKT_HTC); 2098 DPTRACE(qdf_dp_trace(netbuf, QDF_DP_TRACE_HTC_PACKET_PTR_RECORD, 2099 QDF_TRACE_DEFAULT_PDEV_ID, qdf_nbuf_data_addr(netbuf), 2100 sizeof(qdf_nbuf_data(netbuf)), QDF_TX)); 2101 status = hif_send_head(target->hif_dev, 2102 pEndpoint->UL_PipeID, 2103 pEndpoint->Id, actual_length, netbuf, data_attr); 2104 2105 UNLOCK_HTC_TX(target); 2106 return status; 2107 } 2108 #else /*ATH_11AC_TXCOMPACT */ 2109 2110 /** 2111 * htc_send_data_pkt() - htc_send_data_pkt 2112 * @HTCHandle: pointer to HTC handle 2113 * @pPacket: pointer to HTC_PACKET 2114 * @more_data: indicates whether more data is to follow 2115 * 2116 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 2117 */ 2118 QDF_STATUS htc_send_data_pkt(HTC_HANDLE HTCHandle, HTC_PACKET *pPacket, 2119 uint8_t more_data) 2120 { 2121 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2122 HTC_ENDPOINT *pEndpoint; 2123 HTC_FRAME_HDR *pHtcHdr; 2124 HTC_PACKET_QUEUE sendQueue; 2125 qdf_nbuf_t netbuf = NULL; 2126 int tx_resources; 2127 QDF_STATUS status = QDF_STATUS_SUCCESS; 2128 uint32_t data_attr = 0; 2129 bool used_extra_tx_credit = false; 2130 2131 if (pPacket) { 2132 if ((pPacket->Endpoint >= ENDPOINT_MAX) || 2133 (pPacket->Endpoint <= ENDPOINT_UNUSED)) { 2134 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2135 ("%s endpoint is invalid\n", __func__)); 2136 AR_DEBUG_ASSERT(0); 2137 return QDF_STATUS_E_INVAL; 2138 } 2139 pEndpoint = &target->endpoint[pPacket->Endpoint]; 2140 2141 /* add HTC_FRAME_HDR in the initial fragment */ 2142 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 2143 pHtcHdr = (HTC_FRAME_HDR *) qdf_nbuf_get_frag_vaddr(netbuf, 0); 2144 AR_DEBUG_ASSERT(pHtcHdr); 2145 2146 HTC_WRITE32(pHtcHdr, 2147 SM(pPacket->ActualLength, 2148 HTC_FRAME_HDR_PAYLOADLEN) | 2149 SM(pPacket->PktInfo.AsTx.SendFlags, 2150 HTC_FRAME_HDR_FLAGS) | 2151 SM(pPacket->Endpoint, 2152 HTC_FRAME_HDR_ENDPOINTID)); 2153 /* 2154 * If the HIF pipe for the data endpoint is polled rather than 2155 * interrupt-driven, this is a good point to check whether any 2156 * data previously sent through the HIF pipe have finished being 2157 * sent. Since this may result in callbacks to 2158 * htc_tx_completion_handler, which can take the HTC tx lock, 2159 * make the hif_send_complete_check call before acquiring the 2160 * HTC tx lock. 2161 * Call hif_send_complete_check directly, rather than calling 2162 * htc_send_complete_check, and call the PollTimerStart 2163 * separately after calling hif_send_head, so the timer will be 2164 * started to check for completion of the new outstanding 2165 * download (in the unexpected event that other polling calls 2166 * don't catch it). 2167 */ 2168 if (pEndpoint->ul_is_polled) { 2169 htc_send_complete_poll_timer_stop(pEndpoint); 2170 hif_send_complete_check(pEndpoint->target->hif_dev, 2171 pEndpoint->UL_PipeID, 0); 2172 } 2173 2174 LOCK_HTC_TX(target); 2175 2176 pPacket->PktInfo.AsTx.SeqNo = pEndpoint->SeqNo; 2177 pEndpoint->SeqNo++; 2178 2179 HTC_WRITE32(((uint32_t *) pHtcHdr) + 1, 2180 SM(pPacket->PktInfo.AsTx.SeqNo, 2181 HTC_FRAME_HDR_CONTROLBYTES1)); 2182 2183 /* append new packet to pEndpoint->TxQueue */ 2184 HTC_PACKET_ENQUEUE(&pEndpoint->TxQueue, pPacket); 2185 if (HTC_TX_BUNDLE_ENABLED(target) && (more_data)) { 2186 UNLOCK_HTC_TX(target); 2187 return QDF_STATUS_SUCCESS; 2188 } 2189 2190 QDF_NBUF_UPDATE_TX_PKT_COUNT(netbuf, QDF_NBUF_TX_PKT_HTC); 2191 DPTRACE(qdf_dp_trace(netbuf, QDF_DP_TRACE_HTC_PACKET_PTR_RECORD, 2192 QDF_TRACE_DEFAULT_PDEV_ID, qdf_nbuf_data_addr(netbuf), 2193 sizeof(qdf_nbuf_data(netbuf)), QDF_TX)); 2194 } else { 2195 LOCK_HTC_TX(target); 2196 pEndpoint = &target->endpoint[1]; 2197 } 2198 2199 /* increment tx processing count on entry */ 2200 qdf_atomic_inc(&pEndpoint->TxProcessCount); 2201 if (qdf_atomic_read(&pEndpoint->TxProcessCount) > 1) { 2202 /* 2203 * Another thread or task is draining the TX queues on this 2204 * endpoint. That thread will reset the tx processing count when 2205 * the queue is drained. 2206 */ 2207 qdf_atomic_dec(&pEndpoint->TxProcessCount); 2208 UNLOCK_HTC_TX(target); 2209 return QDF_STATUS_SUCCESS; 2210 } 2211 2212 /***** beyond this point only 1 thread may enter ******/ 2213 2214 INIT_HTC_PACKET_QUEUE(&sendQueue); 2215 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 2216 #if DEBUG_CREDIT 2217 int cred = pEndpoint->TxCredits; 2218 #endif 2219 get_htc_send_packets_credit_based(target, pEndpoint, 2220 &sendQueue); 2221 #if DEBUG_CREDIT 2222 if (ep_debug_mask & (1 << pEndpoint->Id)) { 2223 if (cred - pEndpoint->TxCredits > 0) { 2224 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2225 (" <HTC> Decrease EP%d %d - %d = %d credits.\n", 2226 pEndpoint->Id, cred, 2227 cred - pEndpoint->TxCredits, 2228 pEndpoint->TxCredits)); 2229 } 2230 } 2231 #endif 2232 UNLOCK_HTC_TX(target); 2233 } 2234 2235 else if (HTC_TX_BUNDLE_ENABLED(target)) { 2236 if (hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_USB) { 2237 if (hif_get_free_queue_number(target->hif_dev, 2238 pEndpoint->UL_PipeID)) 2239 /* 2240 * Header and payload belongs to the different 2241 * fragments and consume 2 resource for one HTC 2242 * package but USB combine into one transfer. 2243 */ 2244 get_htc_send_packets(target, pEndpoint, 2245 &sendQueue, 2246 HTC_MAX_MSG_PER_BUNDLE_TX 2247 * 2); 2248 } else { 2249 /* Dequeue max packets from endpoint tx queue */ 2250 get_htc_send_packets(target, pEndpoint, &sendQueue, 2251 HTC_MAX_TX_BUNDLE_SEND_LIMIT); 2252 } 2253 UNLOCK_HTC_TX(target); 2254 } else { 2255 /* 2256 * Now drain the endpoint TX queue for transmission as long as 2257 * we have enough transmit resources 2258 */ 2259 tx_resources = 2260 hif_get_free_queue_number(target->hif_dev, 2261 pEndpoint->UL_PipeID); 2262 get_htc_send_packets(target, pEndpoint, &sendQueue, 2263 tx_resources); 2264 UNLOCK_HTC_TX(target); 2265 } 2266 2267 /* send what we can */ 2268 while (true) { 2269 if (HTC_TX_BUNDLE_ENABLED(target) && 2270 (HTC_PACKET_QUEUE_DEPTH(&sendQueue) >= 2271 HTC_MIN_MSG_PER_BUNDLE) && 2272 (hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_SDIO || 2273 hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_USB)) { 2274 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 2275 if (htc_tx_pad_credit_avail(pEndpoint) < 1) { 2276 status = QDF_STATUS_E_RESOURCES; 2277 /* put the sendQueue back at the front 2278 * of pEndpoint->TxQueue 2279 */ 2280 LOCK_HTC_TX(target); 2281 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD( 2282 &pEndpoint->TxQueue, 2283 &sendQueue); 2284 UNLOCK_HTC_TX(target); 2285 break; 2286 } 2287 } 2288 htc_issue_packets_bundle(target, pEndpoint, &sendQueue); 2289 } 2290 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 2291 if (htc_tx_pad_credit_avail(pEndpoint) < 1) { 2292 status = QDF_STATUS_E_RESOURCES; 2293 /* put the sendQueue back at the front 2294 * of pEndpoint->TxQueue 2295 */ 2296 LOCK_HTC_TX(target); 2297 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD( 2298 &pEndpoint->TxQueue, 2299 &sendQueue); 2300 UNLOCK_HTC_TX(target); 2301 break; 2302 } 2303 } 2304 pPacket = htc_packet_dequeue(&sendQueue); 2305 if (!pPacket) 2306 break; 2307 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 2308 pHtcHdr = (HTC_FRAME_HDR *)qdf_nbuf_get_frag_vaddr(netbuf, 0); 2309 2310 LOCK_HTC_TX(target); 2311 /* store in look up queue to match completions */ 2312 HTC_PACKET_ENQUEUE(&pEndpoint->TxLookupQueue, pPacket); 2313 INC_HTC_EP_STAT(pEndpoint, TxIssued, 1); 2314 pEndpoint->ul_outstanding_cnt++; 2315 UNLOCK_HTC_TX(target); 2316 2317 used_extra_tx_credit = 2318 htc_handle_extra_tx_credit(pEndpoint, pPacket, 2319 (uint8_t *)pHtcHdr, 2320 NULL, 2321 pPacket->ActualLength 2322 + HTC_HDR_LENGTH); 2323 2324 status = hif_send_head(target->hif_dev, 2325 pEndpoint->UL_PipeID, 2326 pEndpoint->Id, 2327 HTC_HDR_LENGTH + pPacket->ActualLength, 2328 netbuf, data_attr); 2329 if (status != QDF_STATUS_SUCCESS) { 2330 if (pEndpoint->EpCallBacks.ep_padding_credit_update) { 2331 if (used_extra_tx_credit) { 2332 pEndpoint->EpCallBacks. 2333 ep_padding_credit_update 2334 (pEndpoint->EpCallBacks.pContext, 1); 2335 } 2336 } 2337 } 2338 #if DEBUG_BUNDLE 2339 qdf_print(" Send single EP%d buffer size:0x%x, total:0x%x.", 2340 pEndpoint->Id, 2341 pEndpoint->TxCreditSize, 2342 HTC_HDR_LENGTH + pPacket->ActualLength); 2343 #endif 2344 2345 htc_issue_tx_bundle_stats_inc(target); 2346 2347 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 2348 LOCK_HTC_TX(target); 2349 pEndpoint->ul_outstanding_cnt--; 2350 /* remove this packet from the tx completion queue */ 2351 HTC_PACKET_REMOVE(&pEndpoint->TxLookupQueue, pPacket); 2352 2353 /* 2354 * Don't bother reclaiming credits - HTC flow control 2355 * is not applicable to tx data. 2356 * In LL systems, there is no download flow control, 2357 * since there's virtually no download delay. 2358 * In HL systems, the txrx SW explicitly performs the 2359 * tx flow control. 2360 */ 2361 /* pEndpoint->TxCredits += 2362 * pPacket->PktInfo.AsTx.CreditsUsed; 2363 */ 2364 2365 /* put this frame back at the front of the sendQueue */ 2366 HTC_PACKET_ENQUEUE_TO_HEAD(&sendQueue, pPacket); 2367 2368 /* put the sendQueue back at the front of 2369 * pEndpoint->TxQueue 2370 */ 2371 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 2372 &sendQueue); 2373 UNLOCK_HTC_TX(target); 2374 break; /* still need to reset TxProcessCount */ 2375 } 2376 } 2377 /* done with this endpoint, we can clear the count */ 2378 qdf_atomic_init(&pEndpoint->TxProcessCount); 2379 2380 if (pEndpoint->ul_is_polled) { 2381 /* 2382 * Start a cleanup timer to poll for download completion. 2383 * The download completion should be noticed promptly from 2384 * other polling calls, but the timer provides a safety net 2385 * in case other polling calls don't occur as expected. 2386 */ 2387 htc_send_complete_poll_timer_start(pEndpoint); 2388 } 2389 2390 return status; 2391 } 2392 #endif /*ATH_11AC_TXCOMPACT */ 2393 qdf_export_symbol(htc_send_data_pkt); 2394 2395 /* 2396 * In the adapted HIF layer, qdf_nbuf_t are passed between HIF and HTC, 2397 * since upper layers expects HTC_PACKET containers we use the completed netbuf 2398 * and lookup its corresponding HTC packet buffer from a lookup list. 2399 * This is extra overhead that can be fixed by re-aligning HIF interfaces 2400 * with HTC. 2401 * 2402 */ 2403 static HTC_PACKET *htc_lookup_tx_packet(HTC_TARGET *target, 2404 HTC_ENDPOINT *pEndpoint, 2405 qdf_nbuf_t netbuf) 2406 { 2407 HTC_PACKET *pPacket = NULL; 2408 HTC_PACKET *pFoundPacket = NULL; 2409 HTC_PACKET_QUEUE lookupQueue; 2410 2411 INIT_HTC_PACKET_QUEUE(&lookupQueue); 2412 LOCK_HTC_EP_TX_LOOKUP(pEndpoint); 2413 2414 LOCK_HTC_TX(target); 2415 /* mark that HIF has indicated the send complete for another packet */ 2416 pEndpoint->ul_outstanding_cnt--; 2417 2418 /* Dequeue first packet directly because of in-order completion */ 2419 pPacket = htc_packet_dequeue(&pEndpoint->TxLookupQueue); 2420 if (qdf_unlikely(!pPacket)) { 2421 UNLOCK_HTC_TX(target); 2422 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 2423 return NULL; 2424 } 2425 if (netbuf == (qdf_nbuf_t) GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket)) { 2426 UNLOCK_HTC_TX(target); 2427 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 2428 return pPacket; 2429 } 2430 HTC_PACKET_ENQUEUE(&lookupQueue, pPacket); 2431 2432 /* 2433 * Move TX lookup queue to temp queue because most of packets that are 2434 * not index 0 are not top 10 packets. 2435 */ 2436 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&lookupQueue, 2437 &pEndpoint->TxLookupQueue); 2438 2439 ITERATE_OVER_LIST_ALLOW_REMOVE(&lookupQueue.QueueHead, pPacket, 2440 HTC_PACKET, ListLink) { 2441 2442 if (!pPacket) { 2443 pFoundPacket = pPacket; 2444 break; 2445 } 2446 /* check for removal */ 2447 if (netbuf == 2448 (qdf_nbuf_t) GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket)) { 2449 /* found it */ 2450 HTC_PACKET_REMOVE(&lookupQueue, pPacket); 2451 pFoundPacket = pPacket; 2452 break; 2453 } 2454 2455 } 2456 ITERATE_END; 2457 2458 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxLookupQueue, 2459 &lookupQueue); 2460 UNLOCK_HTC_TX(target); 2461 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 2462 2463 return pFoundPacket; 2464 } 2465 2466 /** 2467 * htc_tx_completion_handler() - htc tx completion handler 2468 * @Context: pointer to HTC_TARGET structure 2469 * @netbuf: pointer to netbuf for which completion handler is being called 2470 * @EpID: end point Id on which the packet was sent 2471 * @toeplitz_hash_result: toeplitz hash result 2472 * 2473 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 2474 */ 2475 QDF_STATUS htc_tx_completion_handler(void *Context, 2476 qdf_nbuf_t netbuf, unsigned int EpID, 2477 uint32_t toeplitz_hash_result) 2478 { 2479 HTC_TARGET *target = (HTC_TARGET *) Context; 2480 HTC_ENDPOINT *pEndpoint; 2481 HTC_PACKET *pPacket; 2482 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 2483 HTC_ENDPOINT_ID eid[DATA_EP_SIZE] = { ENDPOINT_5, ENDPOINT_4, 2484 ENDPOINT_2, ENDPOINT_3 }; 2485 int epidIdx; 2486 uint16_t resourcesThresh[DATA_EP_SIZE]; /* urb resources */ 2487 uint16_t resources; 2488 uint16_t resourcesMax; 2489 #endif 2490 2491 pEndpoint = &target->endpoint[EpID]; 2492 target->TX_comp_cnt++; 2493 pEndpoint->htc_comp_cnt++; 2494 2495 do { 2496 pPacket = htc_lookup_tx_packet(target, pEndpoint, netbuf); 2497 if (!pPacket) { 2498 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2499 ("HTC TX lookup failed!\n")); 2500 /* may have already been flushed and freed */ 2501 netbuf = NULL; 2502 break; 2503 } 2504 if (pPacket->PktInfo.AsTx.Tag != HTC_TX_PACKET_TAG_AUTO_PM && 2505 pPacket->PktInfo.AsTx.Tag != HTC_TX_PACKET_TAG_RUNTIME_PUT && 2506 pPacket->PktInfo.AsTx.Tag != HTC_TX_PACKET_TAG_RTPM_PUT_RC) { 2507 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, HIF_RTPM_ID_WMI); 2508 htc_dec_wmi_runtime_cnt(target, HIF_RTPM_ID_WMI); 2509 } 2510 2511 2512 if (pPacket->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_BUNDLED) { 2513 HTC_PACKET *pPacketTemp; 2514 HTC_PACKET_QUEUE *pQueueSave = 2515 (HTC_PACKET_QUEUE *) pPacket->pContext; 2516 HTC_PACKET_QUEUE_ITERATE_ALLOW_REMOVE(pQueueSave, 2517 pPacketTemp) { 2518 pPacket->Status = QDF_STATUS_SUCCESS; 2519 send_packet_completion(target, pPacketTemp); 2520 } 2521 HTC_PACKET_QUEUE_ITERATE_END; 2522 free_htc_bundle_packet(target, pPacket); 2523 2524 if (hif_get_bus_type(target->hif_dev) == 2525 QDF_BUS_TYPE_USB) { 2526 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) 2527 htc_try_send(target, pEndpoint, NULL); 2528 } 2529 2530 return QDF_STATUS_SUCCESS; 2531 } 2532 /* will be giving this buffer back to upper layers */ 2533 netbuf = NULL; 2534 pPacket->Status = QDF_STATUS_SUCCESS; 2535 send_packet_completion(target, pPacket); 2536 2537 } while (false); 2538 2539 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 2540 /* note: when using TX credit flow, the re-checking of queues 2541 * happens when credits flow back from the target. In the non-TX 2542 * credit case, we recheck after the packet completes 2543 */ 2544 if ((qdf_atomic_read(&pEndpoint->TxProcessCount) == 0) || 2545 (!pEndpoint->async_update)) { 2546 htc_try_send(target, pEndpoint, NULL); 2547 } 2548 } 2549 2550 return QDF_STATUS_SUCCESS; 2551 } 2552 2553 #ifdef WLAN_FEATURE_FASTPATH 2554 /** 2555 * htc_ctrl_msg_cmpl() - checks for tx completion for the endpoint specified 2556 * @htc_pdev: pointer to the htc context 2557 * @htc_ep_id: end point id 2558 * 2559 * checks HTC tx completion 2560 * 2561 * Return: none 2562 */ 2563 void htc_ctrl_msg_cmpl(HTC_HANDLE htc_pdev, HTC_ENDPOINT_ID htc_ep_id) 2564 { 2565 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc_pdev); 2566 HTC_ENDPOINT *pendpoint = &target->endpoint[htc_ep_id]; 2567 2568 htc_send_complete_check(pendpoint, 1); 2569 } 2570 qdf_export_symbol(htc_ctrl_msg_cmpl); 2571 #endif 2572 2573 /* callback when TX resources become available */ 2574 void htc_tx_resource_avail_handler(void *context, uint8_t pipeID) 2575 { 2576 int i; 2577 HTC_TARGET *target = (HTC_TARGET *) context; 2578 HTC_ENDPOINT *pEndpoint = NULL; 2579 2580 for (i = 0; i < ENDPOINT_MAX; i++) { 2581 pEndpoint = &target->endpoint[i]; 2582 if (pEndpoint->service_id != 0) { 2583 if (pEndpoint->UL_PipeID == pipeID) 2584 break; 2585 } 2586 } 2587 2588 if (i >= ENDPOINT_MAX) { 2589 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2590 ("Invalid pipe indicated for TX resource avail : %d!\n", 2591 pipeID)); 2592 return; 2593 } 2594 2595 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2596 ("HIF indicated more resources for pipe:%d\n", 2597 pipeID)); 2598 2599 htc_try_send(target, pEndpoint, NULL); 2600 } 2601 2602 #ifdef FEATURE_RUNTIME_PM 2603 /** 2604 * htc_kick_queues() - resumes tx transactions of suspended endpoints 2605 * @context: pointer to the htc target context 2606 * 2607 * Iterates through the endpoints and provides a context to empty queues 2608 * int the hif layer when they are stalled due to runtime suspend. 2609 * 2610 * Return: none 2611 */ 2612 void htc_kick_queues(void *context) 2613 { 2614 int i; 2615 HTC_TARGET *target = (HTC_TARGET *)context; 2616 HTC_ENDPOINT *endpoint = NULL; 2617 2618 if (hif_rtpm_get(HIF_RTPM_GET_SYNC, HIF_RTPM_ID_HTT)) 2619 return; 2620 2621 for (i = 0; i < ENDPOINT_MAX; i++) { 2622 endpoint = &target->endpoint[i]; 2623 2624 if (endpoint->service_id == 0) 2625 continue; 2626 2627 if (endpoint->EpCallBacks.ep_resume_tx_queue) 2628 endpoint->EpCallBacks.ep_resume_tx_queue( 2629 endpoint->EpCallBacks.pContext); 2630 2631 htc_try_send(target, endpoint, NULL); 2632 } 2633 2634 hif_fastpath_resume(target->hif_dev); 2635 2636 hif_rtpm_put(HIF_RTPM_PUT_ASYNC, HIF_RTPM_ID_HTT); 2637 } 2638 #endif 2639 2640 /* flush endpoint TX queue */ 2641 void htc_flush_endpoint_tx(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint, 2642 HTC_TX_TAG Tag) 2643 { 2644 HTC_PACKET *pPacket; 2645 2646 LOCK_HTC_TX(target); 2647 while (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue)) { 2648 pPacket = htc_packet_dequeue(&pEndpoint->TxQueue); 2649 2650 if (pPacket) { 2651 /* let the sender know the packet was not delivered */ 2652 pPacket->Status = QDF_STATUS_E_CANCELED; 2653 send_packet_completion(target, pPacket); 2654 } 2655 } 2656 UNLOCK_HTC_TX(target); 2657 } 2658 2659 /* flush pending entries in endpoint TX Lookup queue */ 2660 void htc_flush_endpoint_txlookupQ(HTC_TARGET *target, 2661 HTC_ENDPOINT_ID endpoint_id, 2662 bool call_ep_callback) 2663 { 2664 HTC_PACKET *packet; 2665 HTC_ENDPOINT *endpoint; 2666 2667 endpoint = &target->endpoint[endpoint_id]; 2668 2669 if (!endpoint && endpoint->service_id == 0) 2670 return; 2671 2672 LOCK_HTC_TX(target); 2673 while (HTC_PACKET_QUEUE_DEPTH(&endpoint->TxLookupQueue)) { 2674 packet = htc_packet_dequeue(&endpoint->TxLookupQueue); 2675 2676 if (packet) { 2677 if (call_ep_callback == true) { 2678 packet->Status = QDF_STATUS_E_CANCELED; 2679 send_packet_completion(target, packet); 2680 } else { 2681 qdf_mem_free(packet); 2682 } 2683 } 2684 } 2685 UNLOCK_HTC_TX(target); 2686 } 2687 2688 /* HTC API to flush an endpoint's TX queue*/ 2689 void htc_flush_endpoint(HTC_HANDLE HTCHandle, HTC_ENDPOINT_ID Endpoint, 2690 HTC_TX_TAG Tag) 2691 { 2692 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2693 HTC_ENDPOINT *pEndpoint = &target->endpoint[Endpoint]; 2694 2695 if (pEndpoint->service_id == 0) { 2696 AR_DEBUG_ASSERT(false); 2697 /* not in use.. */ 2698 return; 2699 } 2700 2701 htc_flush_endpoint_tx(target, pEndpoint, Tag); 2702 } 2703 2704 /* HTC API to indicate activity to the credit distribution function */ 2705 void htc_indicate_activity_change(HTC_HANDLE HTCHandle, 2706 HTC_ENDPOINT_ID Endpoint, bool Active) 2707 { 2708 /* TODO */ 2709 } 2710 2711 bool htc_is_endpoint_active(HTC_HANDLE HTCHandle, HTC_ENDPOINT_ID Endpoint) 2712 { 2713 return true; 2714 } 2715 2716 void htc_set_pkt_dbg(HTC_HANDLE handle, A_BOOL dbg_flag) 2717 { 2718 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(handle); 2719 2720 target->htc_pkt_dbg = dbg_flag; 2721 } 2722 2723 void htc_set_nodrop_pkt(HTC_HANDLE HTCHandle, A_BOOL isNodropPkt) 2724 { 2725 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2726 2727 target->is_nodrop_pkt = isNodropPkt; 2728 } 2729 2730 void htc_enable_hdr_length_check(HTC_HANDLE htc_hdl, bool htc_hdr_length_check) 2731 { 2732 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc_hdl); 2733 2734 target->htc_hdr_length_check = htc_hdr_length_check; 2735 } 2736 2737 /** 2738 * htc_process_credit_rpt() - process credit report, call distribution function 2739 * @target: pointer to HTC_TARGET 2740 * @pRpt: pointer to HTC_CREDIT_REPORT 2741 * @NumEntries: number of entries in credit report 2742 * @FromEndpoint: endpoint for which credit report is received 2743 * 2744 * Return: A_OK for success or an appropriate A_STATUS error 2745 */ 2746 void htc_process_credit_rpt(HTC_TARGET *target, HTC_CREDIT_REPORT *pRpt, 2747 int NumEntries, HTC_ENDPOINT_ID FromEndpoint) 2748 { 2749 int i; 2750 HTC_ENDPOINT *pEndpoint; 2751 int totalCredits = 0; 2752 uint8_t rpt_credits, rpt_ep_id; 2753 2754 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2755 ("+htc_process_credit_rpt, Credit Report Entries:%d\n", 2756 NumEntries)); 2757 2758 /* lock out TX while we update credits */ 2759 LOCK_HTC_TX(target); 2760 2761 for (i = 0; i < NumEntries; i++, pRpt++) { 2762 2763 rpt_ep_id = HTC_GET_FIELD(pRpt, HTC_CREDIT_REPORT, ENDPOINTID); 2764 2765 if (rpt_ep_id >= ENDPOINT_MAX) { 2766 AR_DEBUG_ASSERT(false); 2767 break; 2768 } 2769 2770 rpt_credits = HTC_GET_FIELD(pRpt, HTC_CREDIT_REPORT, CREDITS); 2771 2772 pEndpoint = &target->endpoint[rpt_ep_id]; 2773 #if DEBUG_CREDIT 2774 if (ep_debug_mask & (1 << pEndpoint->Id)) { 2775 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2776 (" <HTC> Increase EP%d %d + %d = %d credits\n", 2777 rpt_ep_id, pEndpoint->TxCredits, 2778 rpt_credits, 2779 pEndpoint->TxCredits + rpt_credits)); 2780 } 2781 #endif 2782 2783 #ifdef HTC_EP_STAT_PROFILING 2784 2785 INC_HTC_EP_STAT(pEndpoint, TxCreditRpts, 1); 2786 INC_HTC_EP_STAT(pEndpoint, TxCreditsReturned, rpt_credits); 2787 2788 if (FromEndpoint == rpt_ep_id) { 2789 /* this credit report arrived on the same endpoint 2790 * indicating it arrived in an RX packet 2791 */ 2792 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromRx, 2793 rpt_credits); 2794 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromRx, 1); 2795 } else if (FromEndpoint == ENDPOINT_0) { 2796 /* this credit arrived on endpoint 0 as a NULL msg */ 2797 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromEp0, 2798 rpt_credits); 2799 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromEp0, 1); 2800 } else { 2801 /* arrived on another endpoint */ 2802 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromOther, 2803 rpt_credits); 2804 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromOther, 1); 2805 } 2806 2807 #endif 2808 2809 if (pEndpoint->service_id == WMI_CONTROL_SVC) { 2810 htc_credit_record(HTC_PROCESS_CREDIT_REPORT, 2811 pEndpoint->TxCredits + rpt_credits, 2812 HTC_PACKET_QUEUE_DEPTH(&pEndpoint-> 2813 TxQueue)); 2814 hif_latency_detect_credit_record_time( 2815 HIF_PROCESS_CREDIT_REPORT, 2816 target->hif_dev); 2817 } 2818 2819 pEndpoint->TxCredits += rpt_credits; 2820 2821 if (pEndpoint->TxCredits 2822 && HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue)) { 2823 UNLOCK_HTC_TX(target); 2824 #ifdef ATH_11AC_TXCOMPACT 2825 htc_try_send(target, pEndpoint, NULL); 2826 #else 2827 if (pEndpoint->service_id == HTT_DATA_MSG_SVC) 2828 htc_send_data_pkt((HTC_HANDLE)target, NULL, 0); 2829 else 2830 htc_try_send(target, pEndpoint, NULL); 2831 #endif 2832 LOCK_HTC_TX(target); 2833 } 2834 totalCredits += rpt_credits; 2835 } 2836 2837 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2838 (" Report indicated %d credits to distribute\n", 2839 totalCredits)); 2840 2841 UNLOCK_HTC_TX(target); 2842 2843 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_process_credit_rpt\n")); 2844 } 2845 2846 /* function to fetch stats from htc layer*/ 2847 struct ol_ath_htc_stats *ieee80211_ioctl_get_htc_stats(HTC_HANDLE HTCHandle) 2848 { 2849 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2850 2851 return &(target->htc_pkt_stats); 2852 } 2853 2854 #ifdef SYSTEM_PM_CHECK 2855 void htc_system_resume(HTC_HANDLE htc) 2856 { 2857 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc); 2858 HTC_ENDPOINT *endpoint = NULL; 2859 int i; 2860 2861 if (!target) 2862 return; 2863 2864 for (i = 0; i < ENDPOINT_MAX; i++) { 2865 endpoint = &target->endpoint[i]; 2866 2867 if (endpoint->service_id == 0) 2868 continue; 2869 2870 htc_try_send(target, endpoint, NULL); 2871 } 2872 } 2873 #endif 2874