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