1 /* 2 * Copyright (c) 2013-2018 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 /* reclaim credits */ 650 pEndpoint->TxCredits += 651 pPacket->PktInfo.AsTx.CreditsUsed; 652 htc_packet_set_magic_cookie(pPacket, 0); 653 /* put it back into the callers queue */ 654 HTC_PACKET_ENQUEUE_TO_HEAD(pPktQueue, pPacket); 655 if (!pEndpoint->async_update) { 656 UNLOCK_HTC_TX(target); 657 } 658 break; 659 } 660 if (rt_put) { 661 hif_pm_runtime_put(target->hif_dev); 662 rt_put = false; 663 } 664 } 665 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 666 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 667 ("htc_issue_packets, failed pkt:0x%pK status:%d", 668 pPacket, status)); 669 } 670 671 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_issue_packets\n")); 672 673 return status; 674 } 675 676 #ifdef FEATURE_RUNTIME_PM 677 /** 678 * extract_htc_pm_packets(): move pm packets from endpoint into queue 679 * @endpoint: which enpoint to extract packets from 680 * @queue: a queue to store extracted packets in. 681 * 682 * remove pm packets from the endpoint's tx queue. 683 * queue them into a queue 684 */ 685 static void extract_htc_pm_packets(HTC_ENDPOINT *endpoint, 686 HTC_PACKET_QUEUE *queue) 687 { 688 HTC_PACKET *packet; 689 690 /* only WMI endpoint has power management packets */ 691 if (endpoint->service_id != WMI_CONTROL_SVC) 692 return; 693 694 ITERATE_OVER_LIST_ALLOW_REMOVE(&endpoint->TxQueue.QueueHead, packet, 695 HTC_PACKET, ListLink) { 696 if (packet->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_AUTO_PM) { 697 HTC_PACKET_REMOVE(&endpoint->TxQueue, packet); 698 HTC_PACKET_ENQUEUE(queue, packet); 699 } 700 } ITERATE_END 701 } 702 703 /** 704 * queue_htc_pm_packets(): queue pm packets with priority 705 * @endpoint: enpoint to queue packets to 706 * @queue: queue of pm packets to enque 707 * 708 * suspend resume packets get special treatment & priority. 709 * need to queue them at the front of the queue. 710 */ 711 static void queue_htc_pm_packets(HTC_ENDPOINT *endpoint, 712 HTC_PACKET_QUEUE *queue) 713 { 714 if (endpoint->service_id != WMI_CONTROL_SVC) 715 return; 716 717 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&endpoint->TxQueue, queue); 718 } 719 #else 720 static void extract_htc_pm_packets(HTC_ENDPOINT *endpoint, 721 HTC_PACKET_QUEUE *queue) 722 {} 723 724 static void queue_htc_pm_packets(HTC_ENDPOINT *endpoint, 725 HTC_PACKET_QUEUE *queue) 726 {} 727 #endif 728 729 /** 730 * get_htc_send_packets_credit_based() - get packets based on available credits 731 * @target: HTC target on which packets need to be sent 732 * @pEndpoint: logical endpoint on which packets needs to be sent 733 * @pQueue: HTC packet queue containing the list of packets to be sent 734 * 735 * Get HTC send packets from TX queue on an endpoint based on available credits. 736 * The function moves the packets from TX queue of the endpoint to pQueue. 737 * 738 * Return: None 739 */ 740 static void get_htc_send_packets_credit_based(HTC_TARGET *target, 741 HTC_ENDPOINT *pEndpoint, 742 HTC_PACKET_QUEUE *pQueue) 743 { 744 int creditsRequired; 745 int remainder; 746 uint8_t sendFlags; 747 HTC_PACKET *pPacket; 748 unsigned int transferLength; 749 HTC_PACKET_QUEUE *tx_queue; 750 HTC_PACKET_QUEUE pm_queue; 751 bool do_pm_get = false; 752 753 /*** NOTE : the TX lock is held when this function is called ***/ 754 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 755 ("+get_htc_send_packets_credit_based\n")); 756 757 INIT_HTC_PACKET_QUEUE(&pm_queue); 758 extract_htc_pm_packets(pEndpoint, &pm_queue); 759 if (HTC_QUEUE_EMPTY(&pm_queue)) { 760 tx_queue = &pEndpoint->TxQueue; 761 do_pm_get = true; 762 } else { 763 tx_queue = &pm_queue; 764 } 765 766 /* loop until we can grab as many packets out of the queue as we can */ 767 while (true) { 768 if (do_pm_get && hif_pm_runtime_get(target->hif_dev)) { 769 /* bus suspended, runtime resume issued */ 770 QDF_ASSERT(HTC_PACKET_QUEUE_DEPTH(pQueue) == 0); 771 break; 772 } 773 774 sendFlags = 0; 775 /* get packet at head, but don't remove it */ 776 pPacket = htc_get_pkt_at_head(tx_queue); 777 if (pPacket == NULL) { 778 if (do_pm_get) 779 hif_pm_runtime_put(target->hif_dev); 780 break; 781 } 782 783 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 784 (" Got head packet:%pK , Queue Depth: %d\n", 785 pPacket, 786 HTC_PACKET_QUEUE_DEPTH(tx_queue))); 787 788 transferLength = pPacket->ActualLength + HTC_HDR_LENGTH; 789 790 if (transferLength <= pEndpoint->TxCreditSize) { 791 creditsRequired = 1; 792 } else { 793 /* figure out how many credits this message requires */ 794 creditsRequired = 795 transferLength / pEndpoint->TxCreditSize; 796 remainder = transferLength % pEndpoint->TxCreditSize; 797 798 if (remainder) 799 creditsRequired++; 800 } 801 802 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 803 (" Credits Required:%d Got:%d\n", 804 creditsRequired, pEndpoint->TxCredits)); 805 806 if (pEndpoint->Id == ENDPOINT_0) { 807 /* 808 * endpoint 0 is special, it always has a credit and 809 * does not require credit based flow control 810 */ 811 creditsRequired = 0; 812 } else { 813 814 if (pEndpoint->TxCredits < creditsRequired) { 815 #if DEBUG_CREDIT 816 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 817 ("EP%d,No Credit now.%d < %d\n", 818 pEndpoint->Id, 819 pEndpoint->TxCredits, 820 creditsRequired)); 821 #endif 822 if (do_pm_get) 823 hif_pm_runtime_put(target->hif_dev); 824 break; 825 } 826 827 pEndpoint->TxCredits -= creditsRequired; 828 INC_HTC_EP_STAT(pEndpoint, TxCreditsConsummed, 829 creditsRequired); 830 831 /* check if we need credits back from the target */ 832 if (pEndpoint->TxCredits <= 833 pEndpoint->TxCreditsPerMaxMsg) { 834 /* tell the target we need credits ASAP! */ 835 sendFlags |= HTC_FLAGS_NEED_CREDIT_UPDATE; 836 if (pEndpoint->service_id == WMI_CONTROL_SVC) { 837 htc_credit_record(HTC_REQUEST_CREDIT, 838 pEndpoint->TxCredits, 839 HTC_PACKET_QUEUE_DEPTH 840 (tx_queue)); 841 } 842 INC_HTC_EP_STAT(pEndpoint, 843 TxCreditLowIndications, 1); 844 #if DEBUG_CREDIT 845 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 846 (" EP%d Needs Credits\n", 847 pEndpoint->Id)); 848 #endif 849 } 850 } 851 852 /* now we can fully dequeue */ 853 pPacket = htc_packet_dequeue(tx_queue); 854 if (pPacket) { 855 /* save the number of credits this packet consumed */ 856 pPacket->PktInfo.AsTx.CreditsUsed = creditsRequired; 857 /* save send flags */ 858 pPacket->PktInfo.AsTx.SendFlags = sendFlags; 859 860 /* queue this packet into the caller's queue */ 861 HTC_PACKET_ENQUEUE(pQueue, pPacket); 862 } 863 } 864 865 if (!HTC_QUEUE_EMPTY(&pm_queue)) 866 queue_htc_pm_packets(pEndpoint, &pm_queue); 867 868 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 869 ("-get_htc_send_packets_credit_based\n")); 870 871 } 872 873 static void get_htc_send_packets(HTC_TARGET *target, 874 HTC_ENDPOINT *pEndpoint, 875 HTC_PACKET_QUEUE *pQueue, int Resources) 876 { 877 878 HTC_PACKET *pPacket; 879 HTC_PACKET_QUEUE *tx_queue; 880 HTC_PACKET_QUEUE pm_queue; 881 bool do_pm_get = false; 882 883 /*** NOTE : the TX lock is held when this function is called ***/ 884 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 885 ("+get_htc_send_packets %d resources\n", Resources)); 886 887 INIT_HTC_PACKET_QUEUE(&pm_queue); 888 extract_htc_pm_packets(pEndpoint, &pm_queue); 889 if (HTC_QUEUE_EMPTY(&pm_queue)) { 890 tx_queue = &pEndpoint->TxQueue; 891 do_pm_get = true; 892 } else { 893 tx_queue = &pm_queue; 894 } 895 896 /* loop until we can grab as many packets out of the queue as we can */ 897 while (Resources > 0) { 898 int num_frags; 899 900 if (do_pm_get && hif_pm_runtime_get(target->hif_dev)) { 901 /* bus suspended, runtime resume issued */ 902 QDF_ASSERT(HTC_PACKET_QUEUE_DEPTH(pQueue) == 0); 903 break; 904 } 905 906 pPacket = htc_packet_dequeue(tx_queue); 907 if (pPacket == NULL) { 908 if (do_pm_get) 909 hif_pm_runtime_put(target->hif_dev); 910 break; 911 } 912 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 913 (" Got packet:%pK , New Queue Depth: %d\n", 914 pPacket, 915 HTC_PACKET_QUEUE_DEPTH(tx_queue))); 916 /* For non-credit path the sequence number is already embedded 917 * in the constructed HTC header 918 */ 919 pPacket->PktInfo.AsTx.SendFlags = 0; 920 pPacket->PktInfo.AsTx.CreditsUsed = 0; 921 /* queue this packet into the caller's queue */ 922 HTC_PACKET_ENQUEUE(pQueue, pPacket); 923 924 /* 925 * FIX THIS: 926 * For now, avoid calling qdf_nbuf_get_num_frags before calling 927 * qdf_nbuf_map, because the MacOS version of qdf_nbuf_t doesn't 928 * support qdf_nbuf_get_num_frags until after qdf_nbuf_map has 929 * been done. 930 * Assume that the non-data netbufs, i.e. WMI message netbufs, 931 * consist of a single fragment. 932 */ 933 /* WMI messages are in a single-fragment network buf */ 934 num_frags = 935 (pPacket->PktInfo.AsTx. 936 Flags & HTC_TX_PACKET_FLAG_FIXUP_NETBUF) ? 1 : 937 qdf_nbuf_get_num_frags(GET_HTC_PACKET_NET_BUF_CONTEXT 938 (pPacket)); 939 Resources -= num_frags; 940 } 941 942 if (!HTC_QUEUE_EMPTY(&pm_queue)) 943 queue_htc_pm_packets(pEndpoint, &pm_queue); 944 945 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-get_htc_send_packets\n")); 946 947 } 948 949 /** 950 * htc_try_send() - Send packets in a queue on an endpoint 951 * @target: HTC target on which packets need to be sent 952 * @pEndpoint: logical endpoint on which packets needs to be sent 953 * @pCallersSendQueue: packet queue containing the list of packets to be sent 954 * 955 * Return: enum HTC_SEND_QUEUE_RESULT indicates whether the packet was queued to 956 * be sent or the packet should be dropped by the upper layer 957 */ 958 static enum HTC_SEND_QUEUE_RESULT htc_try_send(HTC_TARGET *target, 959 HTC_ENDPOINT *pEndpoint, 960 HTC_PACKET_QUEUE *pCallersSendQueue) 961 { 962 /* temp queue to hold packets at various stages */ 963 HTC_PACKET_QUEUE sendQueue; 964 HTC_PACKET *pPacket; 965 int tx_resources; 966 int overflow; 967 enum HTC_SEND_QUEUE_RESULT result = HTC_SEND_QUEUE_OK; 968 969 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("+htc_try_send (Queue:%pK Depth:%d)\n", 970 pCallersSendQueue, 971 (pCallersSendQueue == 972 NULL) ? 0 : 973 HTC_PACKET_QUEUE_DEPTH 974 (pCallersSendQueue))); 975 976 /* init the local send queue */ 977 INIT_HTC_PACKET_QUEUE(&sendQueue); 978 979 do { 980 981 /* caller didn't provide a queue, just wants us to check 982 * queues and send 983 */ 984 if (pCallersSendQueue == NULL) 985 break; 986 987 if (HTC_QUEUE_EMPTY(pCallersSendQueue)) { 988 /* empty queue */ 989 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, 990 HTC_PKT_Q_EMPTY); 991 result = HTC_SEND_QUEUE_DROP; 992 break; 993 } 994 995 if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) >= 996 pEndpoint->MaxTxQueueDepth) { 997 /* we've already overflowed */ 998 overflow = HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue); 999 } else { 1000 /* figure out how much we will overflow by */ 1001 overflow = HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue); 1002 overflow += HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue); 1003 /* get how much we will overflow the TX queue by */ 1004 overflow -= pEndpoint->MaxTxQueueDepth; 1005 } 1006 1007 /* if overflow is negative or zero, we are okay */ 1008 if (overflow > 0) { 1009 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1010 ("Endpoint %d, TX queue will overflow :%d , Tx Depth:%d, Max:%d\n", 1011 pEndpoint->Id, overflow, 1012 HTC_PACKET_QUEUE_DEPTH(&pEndpoint-> 1013 TxQueue), 1014 pEndpoint->MaxTxQueueDepth)); 1015 } 1016 if ((overflow <= 0) 1017 || (pEndpoint->EpCallBacks.EpSendFull == NULL)) { 1018 /* all packets will fit or caller did not provide send 1019 * full indication handler 1020 * just move all of them to local sendQueue object 1021 */ 1022 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&sendQueue, 1023 pCallersSendQueue); 1024 } else { 1025 int i; 1026 int goodPkts = 1027 HTC_PACKET_QUEUE_DEPTH(pCallersSendQueue) - 1028 overflow; 1029 1030 A_ASSERT(goodPkts >= 0); 1031 /* we have overflowed and callback is provided. Dequeue 1032 * all non-overflow packets into the sendqueue 1033 */ 1034 for (i = 0; i < goodPkts; i++) { 1035 /* pop off caller's queue */ 1036 pPacket = htc_packet_dequeue(pCallersSendQueue); 1037 A_ASSERT(pPacket != NULL); 1038 /* insert into local queue */ 1039 HTC_PACKET_ENQUEUE(&sendQueue, pPacket); 1040 } 1041 1042 /* the caller's queue has all the packets that won't fit 1043 * walk through the caller's queue and indicate each one 1044 * to the send full handler 1045 */ 1046 ITERATE_OVER_LIST_ALLOW_REMOVE(&pCallersSendQueue-> 1047 QueueHead, pPacket, 1048 HTC_PACKET, ListLink) { 1049 1050 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1051 ("Indicating overflowed TX packet: %pK\n", 1052 pPacket)); 1053 /* 1054 * Remove headroom reserved for HTC_FRAME_HDR 1055 * before giving the packet back to the user via 1056 * the EpSendFull callback. 1057 */ 1058 restore_tx_packet(target, pPacket); 1059 1060 if (pEndpoint->EpCallBacks. 1061 EpSendFull(pEndpoint->EpCallBacks.pContext, 1062 pPacket) == HTC_SEND_FULL_DROP) { 1063 /* callback wants the packet dropped */ 1064 INC_HTC_EP_STAT(pEndpoint, TxDropped, 1065 1); 1066 /* leave this one in the caller's queue 1067 * for cleanup 1068 */ 1069 } else { 1070 /* callback wants to keep this packet, 1071 * remove from caller's queue 1072 */ 1073 HTC_PACKET_REMOVE(pCallersSendQueue, 1074 pPacket); 1075 /* put it in the send queue 1076 * add HTC_FRAME_HDR space reservation 1077 * again 1078 */ 1079 qdf_nbuf_push_head 1080 (GET_HTC_PACKET_NET_BUF_CONTEXT 1081 (pPacket), 1082 sizeof(HTC_FRAME_HDR)); 1083 1084 HTC_PACKET_ENQUEUE(&sendQueue, pPacket); 1085 } 1086 1087 } 1088 ITERATE_END; 1089 1090 if (HTC_QUEUE_EMPTY(&sendQueue)) { 1091 /* no packets made it in, caller will cleanup */ 1092 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, 1093 HTC_SEND_Q_EMPTY); 1094 result = HTC_SEND_QUEUE_DROP; 1095 break; 1096 } 1097 } 1098 1099 } while (false); 1100 1101 if (result != HTC_SEND_QUEUE_OK) { 1102 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send: %d\n", 1103 result)); 1104 return result; 1105 } 1106 1107 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1108 tx_resources = 1109 hif_get_free_queue_number(target->hif_dev, 1110 pEndpoint->UL_PipeID); 1111 } else { 1112 tx_resources = 0; 1113 } 1114 1115 LOCK_HTC_TX(target); 1116 1117 if (!HTC_QUEUE_EMPTY(&sendQueue)) { 1118 if (target->is_nodrop_pkt) { 1119 /* 1120 * nodrop pkts have higher priority than normal pkts, 1121 * insert nodrop pkt to head for proper 1122 * start/termination of test. 1123 */ 1124 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 1125 &sendQueue); 1126 target->is_nodrop_pkt = false; 1127 } else { 1128 /* transfer packets to tail */ 1129 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&pEndpoint->TxQueue, 1130 &sendQueue); 1131 A_ASSERT(HTC_QUEUE_EMPTY(&sendQueue)); 1132 INIT_HTC_PACKET_QUEUE(&sendQueue); 1133 } 1134 } 1135 1136 /* increment tx processing count on entry */ 1137 if (qdf_atomic_inc_return(&pEndpoint->TxProcessCount) > 1) { 1138 /* another thread or task is draining the TX queues on this 1139 * endpoint that thread will reset the tx processing count when 1140 * the queue is drained 1141 */ 1142 qdf_atomic_dec(&pEndpoint->TxProcessCount); 1143 UNLOCK_HTC_TX(target); 1144 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send (busy)\n")); 1145 return HTC_SEND_QUEUE_OK; 1146 } 1147 1148 /***** beyond this point only 1 thread may enter ******/ 1149 1150 /* now drain the endpoint TX queue for transmission as long as we have 1151 * enough transmit resources 1152 */ 1153 while (true) { 1154 1155 if (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue) == 0) 1156 break; 1157 1158 if (pEndpoint->async_update && 1159 (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) && 1160 (!tx_resources)) 1161 break; 1162 1163 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1164 #if DEBUG_CREDIT 1165 int cred = pEndpoint->TxCredits; 1166 #endif 1167 /* credit based mechanism provides flow control based on 1168 * target transmit resource availability, we assume that 1169 * the HIF layer will always have bus resources greater 1170 * than target transmit resources 1171 */ 1172 get_htc_send_packets_credit_based(target, pEndpoint, 1173 &sendQueue); 1174 #if DEBUG_CREDIT 1175 if (ep_debug_mask & (1 << pEndpoint->Id)) { 1176 if (cred - pEndpoint->TxCredits > 0) { 1177 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1178 (" <HTC> Decrease EP%d %d - %d = %d credits.\n", 1179 pEndpoint->Id, cred, 1180 cred - 1181 pEndpoint->TxCredits, 1182 pEndpoint->TxCredits)); 1183 } 1184 } 1185 #endif 1186 } else { 1187 1188 /* 1189 * Header and payload belongs to the different fragments and 1190 * consume 2 resource for one HTC package but USB combine into 1191 * one transfer.And one WMI message only consumes one single 1192 * resource. 1193 */ 1194 if (HTC_TX_BUNDLE_ENABLED(target) && tx_resources && 1195 hif_get_bus_type(target->hif_dev) == 1196 QDF_BUS_TYPE_USB) { 1197 if (pEndpoint->service_id == 1198 WMI_CONTROL_SVC) 1199 tx_resources = 1200 HTC_MAX_MSG_PER_BUNDLE_TX; 1201 else 1202 tx_resources = 1203 (HTC_MAX_MSG_PER_BUNDLE_TX * 2); 1204 } 1205 /* get all the packets for this endpoint that we can for 1206 * this pass 1207 */ 1208 get_htc_send_packets(target, pEndpoint, &sendQueue, 1209 tx_resources); 1210 } 1211 1212 if (HTC_PACKET_QUEUE_DEPTH(&sendQueue) == 0) { 1213 /* didn't get any packets due to a lack of resources or 1214 * TX queue was drained 1215 */ 1216 break; 1217 } 1218 1219 if (!pEndpoint->async_update) 1220 UNLOCK_HTC_TX(target); 1221 1222 /* send what we can */ 1223 if (htc_issue_packets(target, pEndpoint, &sendQueue)) { 1224 int i; 1225 1226 result = HTC_SEND_QUEUE_DROP; 1227 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1228 ("htc_issue_packets, failed status:%d put it back to head of callersSendQueue", 1229 result)); 1230 1231 for (i = HTC_PACKET_QUEUE_DEPTH(&sendQueue); i > 0; i--) 1232 hif_pm_runtime_put(target->hif_dev); 1233 if (!pEndpoint->async_update) { 1234 LOCK_HTC_TX(target); 1235 } 1236 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 1237 &sendQueue); 1238 break; 1239 } 1240 1241 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1242 tx_resources = 1243 hif_get_free_queue_number(target->hif_dev, 1244 pEndpoint->UL_PipeID); 1245 } 1246 1247 if (!pEndpoint->async_update) { 1248 LOCK_HTC_TX(target); 1249 } 1250 1251 } 1252 1253 /* done with this endpoint, we can clear the count */ 1254 qdf_atomic_init(&pEndpoint->TxProcessCount); 1255 1256 UNLOCK_HTC_TX(target); 1257 1258 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_try_send:\n")); 1259 1260 return HTC_SEND_QUEUE_OK; 1261 } 1262 1263 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 1264 static uint16_t htc_send_pkts_sched_check(HTC_HANDLE HTCHandle, 1265 HTC_ENDPOINT_ID id) 1266 { 1267 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1268 HTC_ENDPOINT *pEndpoint; 1269 HTC_ENDPOINT_ID eid; 1270 HTC_PACKET_QUEUE *pTxQueue; 1271 uint16_t resources; 1272 uint16_t acQueueStatus[DATA_EP_SIZE] = { 0, 0, 0, 0 }; 1273 1274 if (id < ENDPOINT_2 || id > ENDPOINT_5) 1275 return 1; 1276 1277 for (eid = ENDPOINT_2; eid <= ENDPOINT_5; eid++) { 1278 pEndpoint = &target->endpoint[eid]; 1279 pTxQueue = &pEndpoint->TxQueue; 1280 1281 if (HTC_QUEUE_EMPTY(pTxQueue)) 1282 acQueueStatus[eid - 2] = 1; 1283 } 1284 1285 switch (id) { 1286 case ENDPOINT_2: /* BE */ 1287 return acQueueStatus[0] && acQueueStatus[2] 1288 && acQueueStatus[3]; 1289 case ENDPOINT_3: /* BK */ 1290 return acQueueStatus[0] && acQueueStatus[1] && acQueueStatus[2] 1291 && acQueueStatus[3]; 1292 case ENDPOINT_4: /* VI */ 1293 return acQueueStatus[2] && acQueueStatus[3]; 1294 case ENDPOINT_5: /* VO */ 1295 return acQueueStatus[3]; 1296 default: 1297 return 0; 1298 } 1299 1300 } 1301 1302 static A_STATUS htc_send_pkts_sched_queue(HTC_TARGET *target, 1303 HTC_PACKET_QUEUE *pPktQueue, 1304 HTC_ENDPOINT_ID eid) 1305 { 1306 HTC_ENDPOINT *pEndpoint; 1307 HTC_PACKET_QUEUE *pTxQueue; 1308 HTC_PACKET *pPacket; 1309 int goodPkts; 1310 1311 pEndpoint = &target->endpoint[eid]; 1312 pTxQueue = &pEndpoint->TxQueue; 1313 1314 LOCK_HTC_TX(target); 1315 1316 goodPkts = 1317 pEndpoint->MaxTxQueueDepth - 1318 HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue); 1319 1320 if (goodPkts > 0) { 1321 while (!HTC_QUEUE_EMPTY(pPktQueue)) { 1322 pPacket = htc_packet_dequeue(pPktQueue); 1323 HTC_PACKET_ENQUEUE(pTxQueue, pPacket); 1324 goodPkts--; 1325 1326 if (goodPkts <= 0) 1327 break; 1328 } 1329 } 1330 1331 if (HTC_PACKET_QUEUE_DEPTH(pPktQueue)) { 1332 ITERATE_OVER_LIST_ALLOW_REMOVE(&pPktQueue->QueueHead, pPacket, 1333 HTC_PACKET, ListLink) { 1334 1335 if (pEndpoint->EpCallBacks. 1336 EpSendFull(pEndpoint->EpCallBacks.pContext, 1337 pPacket) == HTC_SEND_FULL_DROP) { 1338 INC_HTC_EP_STAT(pEndpoint, TxDropped, 1); 1339 } else { 1340 HTC_PACKET_REMOVE(pPktQueue, pPacket); 1341 HTC_PACKET_ENQUEUE(pTxQueue, pPacket); 1342 } 1343 } 1344 ITERATE_END; 1345 } 1346 1347 UNLOCK_HTC_TX(target); 1348 1349 return A_OK; 1350 } 1351 1352 #endif 1353 1354 static inline QDF_STATUS __htc_send_pkt(HTC_HANDLE HTCHandle, 1355 HTC_PACKET *pPacket) 1356 { 1357 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1358 HTC_ENDPOINT *pEndpoint; 1359 HTC_PACKET_QUEUE pPktQueue; 1360 qdf_nbuf_t netbuf; 1361 HTC_FRAME_HDR *htc_hdr; 1362 QDF_STATUS status; 1363 1364 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1365 ("+__htc_send_pkt\n")); 1366 1367 /* get packet at head to figure out which endpoint these packets will 1368 * go into 1369 */ 1370 if (NULL == pPacket) { 1371 OL_ATH_HTC_PKT_ERROR_COUNT_INCR(target, GET_HTC_PKT_Q_FAIL); 1372 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-__htc_send_pkt\n")); 1373 return QDF_STATUS_E_INVAL; 1374 } 1375 1376 if ((pPacket->Endpoint >= ENDPOINT_MAX) || 1377 (pPacket->Endpoint <= ENDPOINT_UNUSED)) { 1378 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1379 ("%s endpoint is invalid\n", __func__)); 1380 AR_DEBUG_ASSERT(0); 1381 return QDF_STATUS_E_INVAL; 1382 } 1383 pEndpoint = &target->endpoint[pPacket->Endpoint]; 1384 1385 if (!pEndpoint->service_id) { 1386 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("%s service_id is invalid\n", 1387 __func__)); 1388 return QDF_STATUS_E_INVAL; 1389 } 1390 1391 #ifdef HTC_EP_STAT_PROFILING 1392 LOCK_HTC_TX(target); 1393 INC_HTC_EP_STAT(pEndpoint, TxPosted, 1); 1394 UNLOCK_HTC_TX(target); 1395 #endif 1396 1397 /* provide room in each packet's netbuf for the HTC frame header */ 1398 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 1399 AR_DEBUG_ASSERT(netbuf); 1400 if (!netbuf) 1401 return QDF_STATUS_E_INVAL; 1402 1403 qdf_nbuf_push_head(netbuf, sizeof(HTC_FRAME_HDR)); 1404 /* setup HTC frame header */ 1405 htc_hdr = (HTC_FRAME_HDR *)qdf_nbuf_get_frag_vaddr(netbuf, 0); 1406 AR_DEBUG_ASSERT(htc_hdr); 1407 if (!htc_hdr) 1408 return QDF_STATUS_E_INVAL; 1409 1410 HTC_WRITE32(htc_hdr, 1411 SM(pPacket->ActualLength, 1412 HTC_FRAME_HDR_PAYLOADLEN) | 1413 SM(pPacket->Endpoint, 1414 HTC_FRAME_HDR_ENDPOINTID)); 1415 LOCK_HTC_TX(target); 1416 1417 pPacket->PktInfo.AsTx.SeqNo = pEndpoint->SeqNo; 1418 pEndpoint->SeqNo++; 1419 1420 HTC_WRITE32(((uint32_t *)htc_hdr) + 1, 1421 SM(pPacket->PktInfo.AsTx.SeqNo, 1422 HTC_FRAME_HDR_CONTROLBYTES1)); 1423 1424 UNLOCK_HTC_TX(target); 1425 1426 /* 1427 * For flow control enabled endpoints mapping is done in 1428 * htc_issue_packets and for non flow control enabled endpoints 1429 * its done here. 1430 */ 1431 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1432 pPacket->PktInfo.AsTx.Flags |= HTC_TX_PACKET_FLAG_FIXUP_NETBUF; 1433 status = qdf_nbuf_map(target->osdev, 1434 GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket), 1435 QDF_DMA_TO_DEVICE); 1436 if (status != QDF_STATUS_SUCCESS) { 1437 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1438 ("%s: nbuf map failed, endpoint %pK, seq_no. %d\n", 1439 __func__, pEndpoint, pEndpoint->SeqNo)); 1440 return status; 1441 } 1442 } 1443 1444 INIT_HTC_PACKET_QUEUE_AND_ADD(&pPktQueue, pPacket); 1445 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 1446 if (!htc_send_pkts_sched_check(HTCHandle, pEndpoint->Id)) 1447 htc_send_pkts_sched_queue(HTCHandle, &pPktQueue, pEndpoint->Id); 1448 else 1449 htc_try_send(target, pEndpoint, &pPktQueue); 1450 #else 1451 htc_try_send(target, pEndpoint, &pPktQueue); 1452 #endif 1453 1454 /* do completion on any packets that couldn't get in */ 1455 while (!HTC_QUEUE_EMPTY(&pPktQueue)) { 1456 pPacket = htc_packet_dequeue(&pPktQueue); 1457 1458 if (HTC_STOPPING(target)) 1459 pPacket->Status = QDF_STATUS_E_CANCELED; 1460 else 1461 pPacket->Status = QDF_STATUS_E_RESOURCES; 1462 1463 send_packet_completion(target, pPacket); 1464 } 1465 1466 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-__htc_send_pkt\n")); 1467 1468 return QDF_STATUS_SUCCESS; 1469 } 1470 1471 /* HTC API - htc_send_pkt */ 1472 QDF_STATUS htc_send_pkt(HTC_HANDLE htc_handle, HTC_PACKET *htc_packet) 1473 { 1474 if (!htc_handle) { 1475 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1476 ("%s: HTCHandle is NULL \n", __func__)); 1477 return QDF_STATUS_E_FAILURE; 1478 } 1479 1480 if (!htc_packet) { 1481 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1482 ("%s: pPacket is NULL \n", __func__)); 1483 return QDF_STATUS_E_FAILURE; 1484 } 1485 1486 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1487 ("+-htc_send_pkt: Enter endPointId: %d, buffer: %pK, length: %d\n", 1488 htc_packet->Endpoint, htc_packet->pBuffer, 1489 htc_packet->ActualLength)); 1490 return __htc_send_pkt(htc_handle, htc_packet); 1491 } 1492 qdf_export_symbol(htc_send_pkt); 1493 1494 #ifdef ATH_11AC_TXCOMPACT 1495 /** 1496 * htc_send_data_pkt() - send single data packet on an endpoint 1497 * @HTCHandle: pointer to HTC handle 1498 * @netbuf: network buffer containing the data to be sent 1499 * @ActualLength: length of data that needs to be transmitted 1500 * 1501 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 1502 */ 1503 QDF_STATUS htc_send_data_pkt(HTC_HANDLE HTCHandle, qdf_nbuf_t netbuf, int Epid, 1504 int ActualLength) 1505 { 1506 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1507 HTC_ENDPOINT *pEndpoint; 1508 HTC_FRAME_HDR *pHtcHdr; 1509 QDF_STATUS status = QDF_STATUS_SUCCESS; 1510 int tx_resources; 1511 uint32_t data_attr = 0; 1512 1513 pEndpoint = &target->endpoint[Epid]; 1514 1515 tx_resources = hif_get_free_queue_number(target->hif_dev, 1516 pEndpoint->UL_PipeID); 1517 1518 if (tx_resources < HTC_DATA_RESOURCE_THRS) { 1519 if (pEndpoint->ul_is_polled) { 1520 hif_send_complete_check(pEndpoint->target->hif_dev, 1521 pEndpoint->UL_PipeID, 1); 1522 tx_resources = 1523 hif_get_free_queue_number(target->hif_dev, 1524 pEndpoint->UL_PipeID); 1525 } 1526 if (tx_resources < HTC_DATA_MINDESC_PERPACKET) 1527 return QDF_STATUS_E_FAILURE; 1528 } 1529 1530 if (hif_pm_runtime_get(target->hif_dev)) 1531 return QDF_STATUS_E_FAILURE; 1532 1533 pHtcHdr = (HTC_FRAME_HDR *) qdf_nbuf_get_frag_vaddr(netbuf, 0); 1534 AR_DEBUG_ASSERT(pHtcHdr); 1535 1536 data_attr = qdf_nbuf_data_attr_get(netbuf); 1537 1538 HTC_WRITE32(pHtcHdr, SM(ActualLength, HTC_FRAME_HDR_PAYLOADLEN) | 1539 SM(Epid, HTC_FRAME_HDR_ENDPOINTID)); 1540 /* 1541 * If the HIF pipe for the data endpoint is polled rather than 1542 * interrupt-driven, this is a good point to check whether any 1543 * data previously sent through the HIF pipe have finished being 1544 * sent. 1545 * Since this may result in callbacks to htc_tx_completion_handler, 1546 * which can take the HTC tx lock, make the hif_send_complete_check 1547 * call before acquiring the HTC tx lock. 1548 * Call hif_send_complete_check directly, rather than calling 1549 * htc_send_complete_check, and call the PollTimerStart separately 1550 * after calling hif_send_head, so the timer will be started to 1551 * check for completion of the new outstanding download (in the 1552 * unexpected event that other polling calls don't catch it). 1553 */ 1554 1555 LOCK_HTC_TX(target); 1556 1557 HTC_WRITE32(((uint32_t *) pHtcHdr) + 1, 1558 SM(pEndpoint->SeqNo, HTC_FRAME_HDR_CONTROLBYTES1)); 1559 1560 pEndpoint->SeqNo++; 1561 1562 QDF_NBUF_UPDATE_TX_PKT_COUNT(netbuf, QDF_NBUF_TX_PKT_HTC); 1563 DPTRACE(qdf_dp_trace(netbuf, QDF_DP_TRACE_HTC_PACKET_PTR_RECORD, 1564 QDF_TRACE_DEFAULT_PDEV_ID, qdf_nbuf_data_addr(netbuf), 1565 sizeof(qdf_nbuf_data(netbuf)), QDF_TX)); 1566 status = hif_send_head(target->hif_dev, 1567 pEndpoint->UL_PipeID, 1568 pEndpoint->Id, ActualLength, netbuf, data_attr); 1569 1570 UNLOCK_HTC_TX(target); 1571 return status; 1572 } 1573 #else /*ATH_11AC_TXCOMPACT */ 1574 1575 /** 1576 * htc_send_data_pkt() - htc_send_data_pkt 1577 * @HTCHandle: pointer to HTC handle 1578 * @pPacket: pointer to HTC_PACKET 1579 * @more_data: indicates whether more data is to follow 1580 * 1581 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 1582 */ 1583 QDF_STATUS htc_send_data_pkt(HTC_HANDLE HTCHandle, HTC_PACKET *pPacket, 1584 uint8_t more_data) 1585 { 1586 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 1587 HTC_ENDPOINT *pEndpoint; 1588 HTC_FRAME_HDR *pHtcHdr; 1589 HTC_PACKET_QUEUE sendQueue; 1590 qdf_nbuf_t netbuf = NULL; 1591 int tx_resources; 1592 QDF_STATUS status = QDF_STATUS_SUCCESS; 1593 uint32_t data_attr = 0; 1594 1595 if (pPacket) { 1596 if ((pPacket->Endpoint >= ENDPOINT_MAX) || 1597 (pPacket->Endpoint <= ENDPOINT_UNUSED)) { 1598 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 1599 ("%s endpoint is invalid\n", __func__)); 1600 AR_DEBUG_ASSERT(0); 1601 return QDF_STATUS_E_INVAL; 1602 } 1603 pEndpoint = &target->endpoint[pPacket->Endpoint]; 1604 1605 /* add HTC_FRAME_HDR in the initial fragment */ 1606 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 1607 pHtcHdr = (HTC_FRAME_HDR *) qdf_nbuf_get_frag_vaddr(netbuf, 0); 1608 AR_DEBUG_ASSERT(pHtcHdr); 1609 1610 HTC_WRITE32(pHtcHdr, 1611 SM(pPacket->ActualLength, 1612 HTC_FRAME_HDR_PAYLOADLEN) | 1613 SM(pPacket->PktInfo.AsTx.SendFlags, 1614 HTC_FRAME_HDR_FLAGS) | 1615 SM(pPacket->Endpoint, 1616 HTC_FRAME_HDR_ENDPOINTID)); 1617 /* 1618 * If the HIF pipe for the data endpoint is polled rather than 1619 * interrupt-driven, this is a good point to check whether any 1620 * data previously sent through the HIF pipe have finished being 1621 * sent. Since this may result in callbacks to 1622 * htc_tx_completion_handler, which can take the HTC tx lock, 1623 * make the hif_send_complete_check call before acquiring the 1624 * HTC tx lock. 1625 * Call hif_send_complete_check directly, rather than calling 1626 * htc_send_complete_check, and call the PollTimerStart 1627 * separately after calling hif_send_head, so the timer will be 1628 * started to check for completion of the new outstanding 1629 * download (in the unexpected event that other polling calls 1630 * don't catch it). 1631 */ 1632 if (pEndpoint->ul_is_polled) { 1633 htc_send_complete_poll_timer_stop(pEndpoint); 1634 hif_send_complete_check(pEndpoint->target->hif_dev, 1635 pEndpoint->UL_PipeID, 0); 1636 } 1637 1638 LOCK_HTC_TX(target); 1639 1640 pPacket->PktInfo.AsTx.SeqNo = pEndpoint->SeqNo; 1641 pEndpoint->SeqNo++; 1642 1643 HTC_WRITE32(((uint32_t *) pHtcHdr) + 1, 1644 SM(pPacket->PktInfo.AsTx.SeqNo, 1645 HTC_FRAME_HDR_CONTROLBYTES1)); 1646 1647 /* append new packet to pEndpoint->TxQueue */ 1648 HTC_PACKET_ENQUEUE(&pEndpoint->TxQueue, pPacket); 1649 if (HTC_TX_BUNDLE_ENABLED(target) && (more_data)) { 1650 UNLOCK_HTC_TX(target); 1651 return QDF_STATUS_SUCCESS; 1652 } 1653 1654 QDF_NBUF_UPDATE_TX_PKT_COUNT(netbuf, QDF_NBUF_TX_PKT_HTC); 1655 DPTRACE(qdf_dp_trace(netbuf, QDF_DP_TRACE_HTC_PACKET_PTR_RECORD, 1656 QDF_TRACE_DEFAULT_PDEV_ID, qdf_nbuf_data_addr(netbuf), 1657 sizeof(qdf_nbuf_data(netbuf)), QDF_TX)); 1658 } else { 1659 LOCK_HTC_TX(target); 1660 pEndpoint = &target->endpoint[1]; 1661 } 1662 1663 /* increment tx processing count on entry */ 1664 qdf_atomic_inc(&pEndpoint->TxProcessCount); 1665 if (qdf_atomic_read(&pEndpoint->TxProcessCount) > 1) { 1666 /* 1667 * Another thread or task is draining the TX queues on this 1668 * endpoint. That thread will reset the tx processing count when 1669 * the queue is drained. 1670 */ 1671 qdf_atomic_dec(&pEndpoint->TxProcessCount); 1672 UNLOCK_HTC_TX(target); 1673 return QDF_STATUS_SUCCESS; 1674 } 1675 1676 /***** beyond this point only 1 thread may enter ******/ 1677 1678 INIT_HTC_PACKET_QUEUE(&sendQueue); 1679 if (IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1680 #if DEBUG_CREDIT 1681 int cred = pEndpoint->TxCredits; 1682 #endif 1683 get_htc_send_packets_credit_based(target, pEndpoint, 1684 &sendQueue); 1685 #if DEBUG_CREDIT 1686 if (ep_debug_mask & (1 << pEndpoint->Id)) { 1687 if (cred - pEndpoint->TxCredits > 0) { 1688 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1689 (" <HTC> Decrease EP%d %d - %d = %d credits.\n", 1690 pEndpoint->Id, cred, 1691 cred - pEndpoint->TxCredits, 1692 pEndpoint->TxCredits)); 1693 } 1694 } 1695 #endif 1696 UNLOCK_HTC_TX(target); 1697 } 1698 1699 else if (HTC_TX_BUNDLE_ENABLED(target)) { 1700 1701 if ((hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_USB) && 1702 hif_get_free_queue_number(target->hif_dev, 1703 pEndpoint->UL_PipeID)) { 1704 /* 1705 * Header and payload belongs to the different fragments 1706 * and consume 2 resource for one HTC package but USB 1707 * combine into one transfer. 1708 */ 1709 get_htc_send_packets(target, pEndpoint, &sendQueue, 1710 (HTC_MAX_MSG_PER_BUNDLE_TX * 2)); 1711 } else { 1712 /* Dequeue max packets from endpoint tx queue */ 1713 get_htc_send_packets(target, pEndpoint, &sendQueue, 1714 HTC_MAX_TX_BUNDLE_SEND_LIMIT); 1715 } 1716 1717 UNLOCK_HTC_TX(target); 1718 } else { 1719 /* 1720 * Now drain the endpoint TX queue for transmission as long as 1721 * we have enough transmit resources 1722 */ 1723 tx_resources = 1724 hif_get_free_queue_number(target->hif_dev, 1725 pEndpoint->UL_PipeID); 1726 get_htc_send_packets(target, pEndpoint, &sendQueue, 1727 tx_resources); 1728 UNLOCK_HTC_TX(target); 1729 } 1730 1731 /* send what we can */ 1732 while (true) { 1733 if (HTC_TX_BUNDLE_ENABLED(target) && 1734 (HTC_PACKET_QUEUE_DEPTH(&sendQueue) >= 1735 HTC_MIN_MSG_PER_BUNDLE) && 1736 (hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_SDIO || 1737 hif_get_bus_type(target->hif_dev) == QDF_BUS_TYPE_USB)) { 1738 htc_issue_packets_bundle(target, pEndpoint, &sendQueue); 1739 } 1740 pPacket = htc_packet_dequeue(&sendQueue); 1741 if (pPacket == NULL) 1742 break; 1743 netbuf = GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket); 1744 1745 LOCK_HTC_TX(target); 1746 /* store in look up queue to match completions */ 1747 HTC_PACKET_ENQUEUE(&pEndpoint->TxLookupQueue, pPacket); 1748 INC_HTC_EP_STAT(pEndpoint, TxIssued, 1); 1749 pEndpoint->ul_outstanding_cnt++; 1750 UNLOCK_HTC_TX(target); 1751 1752 status = hif_send_head(target->hif_dev, 1753 pEndpoint->UL_PipeID, 1754 pEndpoint->Id, 1755 HTC_HDR_LENGTH + pPacket->ActualLength, 1756 netbuf, data_attr); 1757 #if DEBUG_BUNDLE 1758 qdf_print(" Send single EP%d buffer size:0x%x, total:0x%x.", 1759 pEndpoint->Id, 1760 pEndpoint->TxCreditSize, 1761 HTC_HDR_LENGTH + pPacket->ActualLength); 1762 #endif 1763 1764 htc_issue_tx_bundle_stats_inc(target); 1765 1766 if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) { 1767 LOCK_HTC_TX(target); 1768 pEndpoint->ul_outstanding_cnt--; 1769 /* remove this packet from the tx completion queue */ 1770 HTC_PACKET_REMOVE(&pEndpoint->TxLookupQueue, pPacket); 1771 1772 /* 1773 * Don't bother reclaiming credits - HTC flow control 1774 * is not applicable to tx data. 1775 * In LL systems, there is no download flow control, 1776 * since there's virtually no download delay. 1777 * In HL systems, the txrx SW explicitly performs the 1778 * tx flow control. 1779 */ 1780 /* pEndpoint->TxCredits += 1781 * pPacket->PktInfo.AsTx.CreditsUsed; 1782 */ 1783 1784 /* put this frame back at the front of the sendQueue */ 1785 HTC_PACKET_ENQUEUE_TO_HEAD(&sendQueue, pPacket); 1786 1787 /* put the sendQueue back at the front of 1788 * pEndpoint->TxQueue 1789 */ 1790 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxQueue, 1791 &sendQueue); 1792 UNLOCK_HTC_TX(target); 1793 break; /* still need to reset TxProcessCount */ 1794 } 1795 } 1796 /* done with this endpoint, we can clear the count */ 1797 qdf_atomic_init(&pEndpoint->TxProcessCount); 1798 1799 if (pEndpoint->ul_is_polled) { 1800 /* 1801 * Start a cleanup timer to poll for download completion. 1802 * The download completion should be noticed promptly from 1803 * other polling calls, but the timer provides a safety net 1804 * in case other polling calls don't occur as expected. 1805 */ 1806 htc_send_complete_poll_timer_start(pEndpoint); 1807 } 1808 1809 return status; 1810 } 1811 #endif /*ATH_11AC_TXCOMPACT */ 1812 qdf_export_symbol(htc_send_data_pkt); 1813 1814 /* 1815 * In the adapted HIF layer, qdf_nbuf_t are passed between HIF and HTC, 1816 * since upper layers expects HTC_PACKET containers we use the completed netbuf 1817 * and lookup its corresponding HTC packet buffer from a lookup list. 1818 * This is extra overhead that can be fixed by re-aligning HIF interfaces 1819 * with HTC. 1820 * 1821 */ 1822 static HTC_PACKET *htc_lookup_tx_packet(HTC_TARGET *target, 1823 HTC_ENDPOINT *pEndpoint, 1824 qdf_nbuf_t netbuf) 1825 { 1826 HTC_PACKET *pPacket = NULL; 1827 HTC_PACKET *pFoundPacket = NULL; 1828 HTC_PACKET_QUEUE lookupQueue; 1829 1830 INIT_HTC_PACKET_QUEUE(&lookupQueue); 1831 LOCK_HTC_EP_TX_LOOKUP(pEndpoint); 1832 1833 LOCK_HTC_TX(target); 1834 1835 /* mark that HIF has indicated the send complete for another packet */ 1836 pEndpoint->ul_outstanding_cnt--; 1837 1838 /* Dequeue first packet directly because of in-order completion */ 1839 pPacket = htc_packet_dequeue(&pEndpoint->TxLookupQueue); 1840 if (qdf_unlikely(!pPacket)) { 1841 UNLOCK_HTC_TX(target); 1842 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 1843 return NULL; 1844 } 1845 if (netbuf == (qdf_nbuf_t) GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket)) { 1846 UNLOCK_HTC_TX(target); 1847 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 1848 return pPacket; 1849 } 1850 HTC_PACKET_ENQUEUE(&lookupQueue, pPacket); 1851 1852 /* 1853 * Move TX lookup queue to temp queue because most of packets that are 1854 * not index 0 are not top 10 packets. 1855 */ 1856 HTC_PACKET_QUEUE_TRANSFER_TO_TAIL(&lookupQueue, 1857 &pEndpoint->TxLookupQueue); 1858 UNLOCK_HTC_TX(target); 1859 1860 ITERATE_OVER_LIST_ALLOW_REMOVE(&lookupQueue.QueueHead, pPacket, 1861 HTC_PACKET, ListLink) { 1862 1863 if (NULL == pPacket) { 1864 pFoundPacket = pPacket; 1865 break; 1866 } 1867 /* check for removal */ 1868 if (netbuf == 1869 (qdf_nbuf_t) GET_HTC_PACKET_NET_BUF_CONTEXT(pPacket)) { 1870 /* found it */ 1871 HTC_PACKET_REMOVE(&lookupQueue, pPacket); 1872 pFoundPacket = pPacket; 1873 break; 1874 } 1875 1876 } 1877 ITERATE_END; 1878 1879 LOCK_HTC_TX(target); 1880 HTC_PACKET_QUEUE_TRANSFER_TO_HEAD(&pEndpoint->TxLookupQueue, 1881 &lookupQueue); 1882 UNLOCK_HTC_TX(target); 1883 UNLOCK_HTC_EP_TX_LOOKUP(pEndpoint); 1884 1885 return pFoundPacket; 1886 } 1887 1888 /** 1889 * htc_tx_completion_handler() - htc tx completion handler 1890 * @Context: pointer to HTC_TARGET structure 1891 * @netbuf: pointer to netbuf for which completion handler is being called 1892 * @EpID: end point Id on which the packet was sent 1893 * @toeplitz_hash_result: toeplitz hash result 1894 * 1895 * Return: QDF_STATUS_SUCCESS for success or an appropriate QDF_STATUS error 1896 */ 1897 QDF_STATUS htc_tx_completion_handler(void *Context, 1898 qdf_nbuf_t netbuf, unsigned int EpID, 1899 uint32_t toeplitz_hash_result) 1900 { 1901 HTC_TARGET *target = (HTC_TARGET *) Context; 1902 HTC_ENDPOINT *pEndpoint; 1903 HTC_PACKET *pPacket; 1904 #ifdef USB_HIF_SINGLE_PIPE_DATA_SCHED 1905 HTC_ENDPOINT_ID eid[DATA_EP_SIZE] = { ENDPOINT_5, ENDPOINT_4, 1906 ENDPOINT_2, ENDPOINT_3 }; 1907 int epidIdx; 1908 uint16_t resourcesThresh[DATA_EP_SIZE]; /* urb resources */ 1909 uint16_t resources; 1910 uint16_t resourcesMax; 1911 #endif 1912 1913 pEndpoint = &target->endpoint[EpID]; 1914 target->TX_comp_cnt++; 1915 1916 do { 1917 pPacket = htc_lookup_tx_packet(target, pEndpoint, netbuf); 1918 if (NULL == pPacket) { 1919 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 1920 ("HTC TX lookup failed!\n")); 1921 /* may have already been flushed and freed */ 1922 netbuf = NULL; 1923 break; 1924 } 1925 if (pPacket->PktInfo.AsTx.Tag != HTC_TX_PACKET_TAG_AUTO_PM) 1926 hif_pm_runtime_put(target->hif_dev); 1927 1928 if (pPacket->PktInfo.AsTx.Tag == HTC_TX_PACKET_TAG_BUNDLED) { 1929 HTC_PACKET *pPacketTemp; 1930 HTC_PACKET_QUEUE *pQueueSave = 1931 (HTC_PACKET_QUEUE *) pPacket->pContext; 1932 HTC_PACKET_QUEUE_ITERATE_ALLOW_REMOVE(pQueueSave, 1933 pPacketTemp) { 1934 pPacket->Status = QDF_STATUS_SUCCESS; 1935 send_packet_completion(target, pPacketTemp); 1936 } 1937 HTC_PACKET_QUEUE_ITERATE_END; 1938 free_htc_bundle_packet(target, pPacket); 1939 1940 if (hif_get_bus_type(target->hif_dev) == 1941 QDF_BUS_TYPE_USB) { 1942 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) 1943 htc_try_send(target, pEndpoint, NULL); 1944 } 1945 1946 return QDF_STATUS_SUCCESS; 1947 } 1948 /* will be giving this buffer back to upper layers */ 1949 netbuf = NULL; 1950 pPacket->Status = QDF_STATUS_SUCCESS; 1951 send_packet_completion(target, pPacket); 1952 1953 } while (false); 1954 1955 if (!IS_TX_CREDIT_FLOW_ENABLED(pEndpoint)) { 1956 /* note: when using TX credit flow, the re-checking of queues 1957 * happens when credits flow back from the target. In the non-TX 1958 * credit case, we recheck after the packet completes 1959 */ 1960 if ((qdf_atomic_read(&pEndpoint->TxProcessCount) == 0) || 1961 (!pEndpoint->async_update)) { 1962 htc_try_send(target, pEndpoint, NULL); 1963 } 1964 } 1965 1966 return QDF_STATUS_SUCCESS; 1967 } 1968 1969 #ifdef WLAN_FEATURE_FASTPATH 1970 /** 1971 * htc_ctrl_msg_cmpl(): checks for tx completion for the endpoint specified 1972 * @HTC_HANDLE : pointer to the htc target context 1973 * @htc_ep_id : end point id 1974 * 1975 * checks HTC tx completion 1976 * 1977 * Return: none 1978 */ 1979 void htc_ctrl_msg_cmpl(HTC_HANDLE htc_pdev, HTC_ENDPOINT_ID htc_ep_id) 1980 { 1981 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(htc_pdev); 1982 HTC_ENDPOINT *pendpoint = &target->endpoint[htc_ep_id]; 1983 1984 htc_send_complete_check(pendpoint, 1); 1985 } 1986 qdf_export_symbol(htc_ctrl_msg_cmpl); 1987 #endif 1988 1989 /* callback when TX resources become available */ 1990 void htc_tx_resource_avail_handler(void *context, uint8_t pipeID) 1991 { 1992 int i; 1993 HTC_TARGET *target = (HTC_TARGET *) context; 1994 HTC_ENDPOINT *pEndpoint = NULL; 1995 1996 for (i = 0; i < ENDPOINT_MAX; i++) { 1997 pEndpoint = &target->endpoint[i]; 1998 if (pEndpoint->service_id != 0) { 1999 if (pEndpoint->UL_PipeID == pipeID) 2000 break; 2001 } 2002 } 2003 2004 if (i >= ENDPOINT_MAX) { 2005 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2006 ("Invalid pipe indicated for TX resource avail : %d!\n", 2007 pipeID)); 2008 return; 2009 } 2010 2011 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2012 ("HIF indicated more resources for pipe:%d\n", 2013 pipeID)); 2014 2015 htc_try_send(target, pEndpoint, NULL); 2016 } 2017 2018 #ifdef FEATURE_RUNTIME_PM 2019 /** 2020 * htc_kick_queues(): resumes tx transactions of suspended endpoints 2021 * @context: pointer to the htc target context 2022 * 2023 * Iterates through the enpoints and provides a context to empty queues 2024 * int the hif layer when they are stalled due to runtime suspend. 2025 * 2026 * Return: none 2027 */ 2028 void htc_kick_queues(void *context) 2029 { 2030 int i; 2031 HTC_TARGET *target = (HTC_TARGET *)context; 2032 HTC_ENDPOINT *endpoint = NULL; 2033 2034 for (i = 0; i < ENDPOINT_MAX; i++) { 2035 endpoint = &target->endpoint[i]; 2036 2037 if (endpoint->service_id == 0) 2038 continue; 2039 2040 if (endpoint->EpCallBacks.ep_resume_tx_queue) 2041 endpoint->EpCallBacks.ep_resume_tx_queue( 2042 endpoint->EpCallBacks.pContext); 2043 2044 htc_try_send(target, endpoint, NULL); 2045 } 2046 2047 hif_fastpath_resume(target->hif_dev); 2048 } 2049 #endif 2050 2051 /* flush endpoint TX queue */ 2052 void htc_flush_endpoint_tx(HTC_TARGET *target, HTC_ENDPOINT *pEndpoint, 2053 HTC_TX_TAG Tag) 2054 { 2055 HTC_PACKET *pPacket; 2056 2057 LOCK_HTC_TX(target); 2058 while (HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue)) { 2059 pPacket = htc_packet_dequeue(&pEndpoint->TxQueue); 2060 2061 if (pPacket) { 2062 /* let the sender know the packet was not delivered */ 2063 pPacket->Status = QDF_STATUS_E_CANCELED; 2064 send_packet_completion(target, pPacket); 2065 } 2066 } 2067 UNLOCK_HTC_TX(target); 2068 } 2069 2070 /* flush pending entries in endpoint TX Lookup queue */ 2071 void htc_flush_endpoint_txlookupQ(HTC_TARGET *target, 2072 HTC_ENDPOINT_ID endpoint_id, 2073 bool call_ep_callback) 2074 { 2075 HTC_PACKET *packet; 2076 HTC_ENDPOINT *endpoint; 2077 2078 endpoint = &target->endpoint[endpoint_id]; 2079 2080 if (!endpoint && endpoint->service_id == 0) 2081 return; 2082 2083 while (HTC_PACKET_QUEUE_DEPTH(&endpoint->TxLookupQueue)) { 2084 packet = htc_packet_dequeue(&endpoint->TxLookupQueue); 2085 2086 if (packet) { 2087 if (call_ep_callback == true) { 2088 packet->Status = QDF_STATUS_E_CANCELED; 2089 send_packet_completion(target, packet); 2090 } else { 2091 qdf_mem_free(packet); 2092 } 2093 } 2094 } 2095 } 2096 2097 /* HTC API to flush an endpoint's TX queue*/ 2098 void htc_flush_endpoint(HTC_HANDLE HTCHandle, HTC_ENDPOINT_ID Endpoint, 2099 HTC_TX_TAG Tag) 2100 { 2101 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2102 HTC_ENDPOINT *pEndpoint = &target->endpoint[Endpoint]; 2103 2104 if (pEndpoint->service_id == 0) { 2105 AR_DEBUG_ASSERT(false); 2106 /* not in use.. */ 2107 return; 2108 } 2109 2110 htc_flush_endpoint_tx(target, pEndpoint, Tag); 2111 } 2112 2113 /* HTC API to indicate activity to the credit distribution function */ 2114 void htc_indicate_activity_change(HTC_HANDLE HTCHandle, 2115 HTC_ENDPOINT_ID Endpoint, bool Active) 2116 { 2117 /* TODO */ 2118 } 2119 2120 bool htc_is_endpoint_active(HTC_HANDLE HTCHandle, HTC_ENDPOINT_ID Endpoint) 2121 { 2122 return true; 2123 } 2124 2125 void htc_set_nodrop_pkt(HTC_HANDLE HTCHandle, A_BOOL isNodropPkt) 2126 { 2127 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2128 2129 target->is_nodrop_pkt = isNodropPkt; 2130 } 2131 2132 /** 2133 * htc_process_credit_rpt() - process credit report, call distribution function 2134 * @target: pointer to HTC_TARGET 2135 * @pRpt: pointer to HTC_CREDIT_REPORT 2136 * @NumEntries: number of entries in credit report 2137 * @FromEndpoint: endpoint for which credit report is received 2138 * 2139 * Return: A_OK for success or an appropriate A_STATUS error 2140 */ 2141 void htc_process_credit_rpt(HTC_TARGET *target, HTC_CREDIT_REPORT *pRpt, 2142 int NumEntries, HTC_ENDPOINT_ID FromEndpoint) 2143 { 2144 int i; 2145 HTC_ENDPOINT *pEndpoint; 2146 int totalCredits = 0; 2147 uint8_t rpt_credits, rpt_ep_id; 2148 2149 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2150 ("+htc_process_credit_rpt, Credit Report Entries:%d\n", 2151 NumEntries)); 2152 2153 /* lock out TX while we update credits */ 2154 LOCK_HTC_TX(target); 2155 2156 for (i = 0; i < NumEntries; i++, pRpt++) { 2157 2158 rpt_ep_id = HTC_GET_FIELD(pRpt, HTC_CREDIT_REPORT, ENDPOINTID); 2159 2160 if (rpt_ep_id >= ENDPOINT_MAX) { 2161 AR_DEBUG_ASSERT(false); 2162 break; 2163 } 2164 2165 rpt_credits = HTC_GET_FIELD(pRpt, HTC_CREDIT_REPORT, CREDITS); 2166 2167 pEndpoint = &target->endpoint[rpt_ep_id]; 2168 #if DEBUG_CREDIT 2169 if (ep_debug_mask & (1 << pEndpoint->Id)) { 2170 AR_DEBUG_PRINTF(ATH_DEBUG_ERR, 2171 (" <HTC> Increase EP%d %d + %d = %d credits\n", 2172 rpt_ep_id, pEndpoint->TxCredits, 2173 rpt_credits, 2174 pEndpoint->TxCredits + rpt_credits)); 2175 } 2176 #endif 2177 2178 #ifdef HTC_EP_STAT_PROFILING 2179 2180 INC_HTC_EP_STAT(pEndpoint, TxCreditRpts, 1); 2181 INC_HTC_EP_STAT(pEndpoint, TxCreditsReturned, rpt_credits); 2182 2183 if (FromEndpoint == rpt_ep_id) { 2184 /* this credit report arrived on the same endpoint 2185 * indicating it arrived in an RX packet 2186 */ 2187 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromRx, 2188 rpt_credits); 2189 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromRx, 1); 2190 } else if (FromEndpoint == ENDPOINT_0) { 2191 /* this credit arrived on endpoint 0 as a NULL msg */ 2192 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromEp0, 2193 rpt_credits); 2194 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromEp0, 1); 2195 } else { 2196 /* arrived on another endpoint */ 2197 INC_HTC_EP_STAT(pEndpoint, TxCreditsFromOther, 2198 rpt_credits); 2199 INC_HTC_EP_STAT(pEndpoint, TxCreditRptsFromOther, 1); 2200 } 2201 2202 #endif 2203 2204 if (pEndpoint->service_id == WMI_CONTROL_SVC) { 2205 htc_credit_record(HTC_PROCESS_CREDIT_REPORT, 2206 pEndpoint->TxCredits + rpt_credits, 2207 HTC_PACKET_QUEUE_DEPTH(&pEndpoint-> 2208 TxQueue)); 2209 } 2210 2211 pEndpoint->TxCredits += rpt_credits; 2212 2213 if (pEndpoint->TxCredits 2214 && HTC_PACKET_QUEUE_DEPTH(&pEndpoint->TxQueue)) { 2215 UNLOCK_HTC_TX(target); 2216 #ifdef ATH_11AC_TXCOMPACT 2217 htc_try_send(target, pEndpoint, NULL); 2218 #else 2219 if (pEndpoint->service_id == HTT_DATA_MSG_SVC) 2220 htc_send_data_pkt(target, NULL, 0); 2221 else 2222 htc_try_send(target, pEndpoint, NULL); 2223 #endif 2224 LOCK_HTC_TX(target); 2225 } 2226 totalCredits += rpt_credits; 2227 } 2228 2229 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, 2230 (" Report indicated %d credits to distribute\n", 2231 totalCredits)); 2232 2233 UNLOCK_HTC_TX(target); 2234 2235 AR_DEBUG_PRINTF(ATH_DEBUG_SEND, ("-htc_process_credit_rpt\n")); 2236 } 2237 2238 /* function to fetch stats from htc layer*/ 2239 struct ol_ath_htc_stats *ieee80211_ioctl_get_htc_stats(HTC_HANDLE HTCHandle) 2240 { 2241 HTC_TARGET *target = GET_HTC_TARGET_FROM_HANDLE(HTCHandle); 2242 2243 return &(target->htc_pkt_stats); 2244 } 2245