1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2/* 3 * Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved. 4 */ 5 6#include "ena_eth_com.h" 7 8static struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc( 9 struct ena_com_io_cq *io_cq) 10{ 11 struct ena_eth_io_rx_cdesc_base *cdesc; 12 u16 expected_phase, head_masked; 13 u16 desc_phase; 14 15 head_masked = io_cq->head & (io_cq->q_depth - 1); 16 expected_phase = io_cq->phase; 17 18 cdesc = (struct ena_eth_io_rx_cdesc_base *)(io_cq->cdesc_addr.virt_addr 19 + (head_masked * io_cq->cdesc_entry_size_in_bytes)); 20 21 desc_phase = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >> 22 ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT; 23 24 if (desc_phase != expected_phase) 25 return NULL; 26 27 /* Make sure we read the rest of the descriptor after the phase bit 28 * has been read 29 */ 30 dma_rmb(); 31 32 return cdesc; 33} 34 35static void *get_sq_desc_regular_queue(struct ena_com_io_sq *io_sq) 36{ 37 u16 tail_masked; 38 u32 offset; 39 40 tail_masked = io_sq->tail & (io_sq->q_depth - 1); 41 42 offset = tail_masked * io_sq->desc_entry_size; 43 44 return (void *)((uintptr_t)io_sq->desc_addr.virt_addr + offset); 45} 46 47static int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq, 48 u8 *bounce_buffer) 49{ 50 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 51 52 u16 dst_tail_mask; 53 u32 dst_offset; 54 55 dst_tail_mask = io_sq->tail & (io_sq->q_depth - 1); 56 dst_offset = dst_tail_mask * llq_info->desc_list_entry_size; 57 58 if (is_llq_max_tx_burst_exists(io_sq)) { 59 if (unlikely(!io_sq->entries_in_tx_burst_left)) { 60 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 61 "Error: trying to send more packets than tx burst allows\n"); 62 return -ENOSPC; 63 } 64 65 io_sq->entries_in_tx_burst_left--; 66 netdev_dbg(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 67 "Decreasing entries_in_tx_burst_left of queue %d to %d\n", io_sq->qid, 68 io_sq->entries_in_tx_burst_left); 69 } 70 71 /* Make sure everything was written into the bounce buffer before 72 * writing the bounce buffer to the device 73 */ 74 wmb(); 75 76 /* The line is completed. Copy it to dev */ 77 __iowrite64_copy(io_sq->desc_addr.pbuf_dev_addr + dst_offset, bounce_buffer, 78 (llq_info->desc_list_entry_size) / 8); 79 80 io_sq->tail++; 81 82 /* Switch phase bit in case of wrap around */ 83 if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0)) 84 io_sq->phase ^= 1; 85 86 return 0; 87} 88 89static int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq, 90 u8 *header_src, 91 u16 header_len) 92{ 93 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 94 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 95 u8 *bounce_buffer = pkt_ctrl->curr_bounce_buf; 96 u16 header_offset; 97 98 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)) 99 return 0; 100 101 header_offset = 102 llq_info->descs_num_before_header * io_sq->desc_entry_size; 103 104 if (unlikely((header_offset + header_len) > llq_info->desc_list_entry_size)) { 105 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 106 "Trying to write header larger than llq entry can accommodate\n"); 107 return -EFAULT; 108 } 109 110 if (unlikely(!bounce_buffer)) { 111 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, "Bounce buffer is NULL\n"); 112 return -EFAULT; 113 } 114 115 memcpy(bounce_buffer + header_offset, header_src, header_len); 116 117 return 0; 118} 119 120static void *get_sq_desc_llq(struct ena_com_io_sq *io_sq) 121{ 122 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 123 u8 *bounce_buffer; 124 void *sq_desc; 125 126 bounce_buffer = pkt_ctrl->curr_bounce_buf; 127 128 if (unlikely(!bounce_buffer)) { 129 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, "Bounce buffer is NULL\n"); 130 return NULL; 131 } 132 133 sq_desc = bounce_buffer + pkt_ctrl->idx * io_sq->desc_entry_size; 134 pkt_ctrl->idx++; 135 pkt_ctrl->descs_left_in_line--; 136 137 return sq_desc; 138} 139 140static int ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq) 141{ 142 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 143 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 144 int rc; 145 146 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)) 147 return 0; 148 149 /* bounce buffer was used, so write it and get a new one */ 150 if (likely(pkt_ctrl->idx)) { 151 rc = ena_com_write_bounce_buffer_to_dev(io_sq, 152 pkt_ctrl->curr_bounce_buf); 153 if (unlikely(rc)) { 154 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 155 "Failed to write bounce buffer to device\n"); 156 return rc; 157 } 158 159 pkt_ctrl->curr_bounce_buf = 160 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl); 161 memset(io_sq->llq_buf_ctrl.curr_bounce_buf, 162 0x0, llq_info->desc_list_entry_size); 163 } 164 165 pkt_ctrl->idx = 0; 166 pkt_ctrl->descs_left_in_line = llq_info->descs_num_before_header; 167 return 0; 168} 169 170static void *get_sq_desc(struct ena_com_io_sq *io_sq) 171{ 172 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) 173 return get_sq_desc_llq(io_sq); 174 175 return get_sq_desc_regular_queue(io_sq); 176} 177 178static int ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq) 179{ 180 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 181 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 182 int rc; 183 184 if (!pkt_ctrl->descs_left_in_line) { 185 rc = ena_com_write_bounce_buffer_to_dev(io_sq, 186 pkt_ctrl->curr_bounce_buf); 187 if (unlikely(rc)) { 188 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 189 "Failed to write bounce buffer to device\n"); 190 return rc; 191 } 192 193 pkt_ctrl->curr_bounce_buf = 194 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl); 195 memset(io_sq->llq_buf_ctrl.curr_bounce_buf, 196 0x0, llq_info->desc_list_entry_size); 197 198 pkt_ctrl->idx = 0; 199 if (unlikely(llq_info->desc_stride_ctrl == ENA_ADMIN_SINGLE_DESC_PER_ENTRY)) 200 pkt_ctrl->descs_left_in_line = 1; 201 else 202 pkt_ctrl->descs_left_in_line = 203 llq_info->desc_list_entry_size / io_sq->desc_entry_size; 204 } 205 206 return 0; 207} 208 209static int ena_com_sq_update_tail(struct ena_com_io_sq *io_sq) 210{ 211 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) 212 return ena_com_sq_update_llq_tail(io_sq); 213 214 io_sq->tail++; 215 216 /* Switch phase bit in case of wrap around */ 217 if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0)) 218 io_sq->phase ^= 1; 219 220 return 0; 221} 222 223static struct ena_eth_io_rx_cdesc_base * 224 ena_com_rx_cdesc_idx_to_ptr(struct ena_com_io_cq *io_cq, u16 idx) 225{ 226 idx &= (io_cq->q_depth - 1); 227 return (struct ena_eth_io_rx_cdesc_base *) 228 ((uintptr_t)io_cq->cdesc_addr.virt_addr + 229 idx * io_cq->cdesc_entry_size_in_bytes); 230} 231 232static u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq, 233 u16 *first_cdesc_idx) 234{ 235 struct ena_eth_io_rx_cdesc_base *cdesc; 236 u16 count = 0, head_masked; 237 u32 last = 0; 238 239 do { 240 cdesc = ena_com_get_next_rx_cdesc(io_cq); 241 if (!cdesc) 242 break; 243 244 ena_com_cq_inc_head(io_cq); 245 count++; 246 last = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >> 247 ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT; 248 } while (!last); 249 250 if (last) { 251 *first_cdesc_idx = io_cq->cur_rx_pkt_cdesc_start_idx; 252 count += io_cq->cur_rx_pkt_cdesc_count; 253 254 head_masked = io_cq->head & (io_cq->q_depth - 1); 255 256 io_cq->cur_rx_pkt_cdesc_count = 0; 257 io_cq->cur_rx_pkt_cdesc_start_idx = head_masked; 258 259 netdev_dbg(ena_com_io_cq_to_ena_dev(io_cq)->net_device, 260 "ENA q_id: %d packets were completed. first desc idx %u descs# %d\n", 261 io_cq->qid, *first_cdesc_idx, count); 262 } else { 263 io_cq->cur_rx_pkt_cdesc_count += count; 264 count = 0; 265 } 266 267 return count; 268} 269 270static int ena_com_create_meta(struct ena_com_io_sq *io_sq, 271 struct ena_com_tx_meta *ena_meta) 272{ 273 struct ena_eth_io_tx_meta_desc *meta_desc = NULL; 274 275 meta_desc = get_sq_desc(io_sq); 276 if (unlikely(!meta_desc)) 277 return -EFAULT; 278 279 memset(meta_desc, 0x0, sizeof(struct ena_eth_io_tx_meta_desc)); 280 281 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_DESC_MASK; 282 283 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK; 284 285 /* bits 0-9 of the mss */ 286 meta_desc->word2 |= ((u32)ena_meta->mss << 287 ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT) & 288 ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK; 289 /* bits 10-13 of the mss */ 290 meta_desc->len_ctrl |= ((ena_meta->mss >> 10) << 291 ENA_ETH_IO_TX_META_DESC_MSS_HI_SHIFT) & 292 ENA_ETH_IO_TX_META_DESC_MSS_HI_MASK; 293 294 /* Extended meta desc */ 295 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK; 296 meta_desc->len_ctrl |= ((u32)io_sq->phase << 297 ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT) & 298 ENA_ETH_IO_TX_META_DESC_PHASE_MASK; 299 300 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_FIRST_MASK; 301 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_STORE_MASK; 302 303 meta_desc->word2 |= ena_meta->l3_hdr_len & 304 ENA_ETH_IO_TX_META_DESC_L3_HDR_LEN_MASK; 305 meta_desc->word2 |= (ena_meta->l3_hdr_offset << 306 ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT) & 307 ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK; 308 309 meta_desc->word2 |= ((u32)ena_meta->l4_hdr_len << 310 ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT) & 311 ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK; 312 313 return ena_com_sq_update_tail(io_sq); 314} 315 316static int ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq, 317 struct ena_com_tx_ctx *ena_tx_ctx, 318 bool *have_meta) 319{ 320 struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta; 321 322 /* When disable meta caching is set, don't bother to save the meta and 323 * compare it to the stored version, just create the meta 324 */ 325 if (io_sq->disable_meta_caching) { 326 *have_meta = true; 327 return ena_com_create_meta(io_sq, ena_meta); 328 } 329 330 if (ena_com_meta_desc_changed(io_sq, ena_tx_ctx)) { 331 *have_meta = true; 332 /* Cache the meta desc */ 333 memcpy(&io_sq->cached_tx_meta, ena_meta, 334 sizeof(struct ena_com_tx_meta)); 335 return ena_com_create_meta(io_sq, ena_meta); 336 } 337 338 *have_meta = false; 339 return 0; 340} 341 342static void ena_com_rx_set_flags(struct ena_com_io_cq *io_cq, 343 struct ena_com_rx_ctx *ena_rx_ctx, 344 struct ena_eth_io_rx_cdesc_base *cdesc) 345{ 346 ena_rx_ctx->l3_proto = cdesc->status & 347 ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK; 348 ena_rx_ctx->l4_proto = 349 (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_MASK) >> 350 ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_SHIFT; 351 ena_rx_ctx->l3_csum_err = 352 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_MASK) >> 353 ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_SHIFT); 354 ena_rx_ctx->l4_csum_err = 355 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK) >> 356 ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT); 357 ena_rx_ctx->l4_csum_checked = 358 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK) >> 359 ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT); 360 ena_rx_ctx->hash = cdesc->hash; 361 ena_rx_ctx->frag = 362 (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >> 363 ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT; 364 365 netdev_dbg(ena_com_io_cq_to_ena_dev(io_cq)->net_device, 366 "l3_proto %d l4_proto %d l3_csum_err %d l4_csum_err %d hash %d frag %d cdesc_status %x\n", 367 ena_rx_ctx->l3_proto, ena_rx_ctx->l4_proto, ena_rx_ctx->l3_csum_err, 368 ena_rx_ctx->l4_csum_err, ena_rx_ctx->hash, ena_rx_ctx->frag, cdesc->status); 369} 370 371/*****************************************************************************/ 372/***************************** API **********************************/ 373/*****************************************************************************/ 374 375int ena_com_prepare_tx(struct ena_com_io_sq *io_sq, 376 struct ena_com_tx_ctx *ena_tx_ctx, 377 int *nb_hw_desc) 378{ 379 struct ena_eth_io_tx_desc *desc = NULL; 380 struct ena_com_buf *ena_bufs = ena_tx_ctx->ena_bufs; 381 void *buffer_to_push = ena_tx_ctx->push_header; 382 u16 header_len = ena_tx_ctx->header_len; 383 u16 num_bufs = ena_tx_ctx->num_bufs; 384 u16 start_tail = io_sq->tail; 385 int i, rc; 386 bool have_meta; 387 u64 addr_hi; 388 389 WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_TX, "wrong Q type"); 390 391 /* num_bufs +1 for potential meta desc */ 392 if (unlikely(!ena_com_sq_have_enough_space(io_sq, num_bufs + 1))) { 393 netdev_dbg(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 394 "Not enough space in the tx queue\n"); 395 return -ENOMEM; 396 } 397 398 if (unlikely(header_len > io_sq->tx_max_header_size)) { 399 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 400 "Header size is too large %d max header: %d\n", header_len, 401 io_sq->tx_max_header_size); 402 return -EINVAL; 403 } 404 405 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV && !buffer_to_push)) { 406 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 407 "Push header wasn't provided in LLQ mode\n"); 408 return -EINVAL; 409 } 410 411 rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len); 412 if (unlikely(rc)) 413 return rc; 414 415 rc = ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx, &have_meta); 416 if (unlikely(rc)) { 417 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 418 "Failed to create and store tx meta desc\n"); 419 return rc; 420 } 421 422 /* If the caller doesn't want to send packets */ 423 if (unlikely(!num_bufs && !header_len)) { 424 rc = ena_com_close_bounce_buffer(io_sq); 425 if (rc) 426 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 427 "Failed to write buffers to LLQ\n"); 428 *nb_hw_desc = io_sq->tail - start_tail; 429 return rc; 430 } 431 432 desc = get_sq_desc(io_sq); 433 if (unlikely(!desc)) 434 return -EFAULT; 435 memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc)); 436 437 /* Set first desc when we don't have meta descriptor */ 438 if (!have_meta) 439 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_FIRST_MASK; 440 441 desc->buff_addr_hi_hdr_sz |= ((u32)header_len << 442 ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT) & 443 ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK; 444 desc->len_ctrl |= ((u32)io_sq->phase << ENA_ETH_IO_TX_DESC_PHASE_SHIFT) & 445 ENA_ETH_IO_TX_DESC_PHASE_MASK; 446 447 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_COMP_REQ_MASK; 448 449 /* Bits 0-9 */ 450 desc->meta_ctrl |= ((u32)ena_tx_ctx->req_id << 451 ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT) & 452 ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK; 453 454 desc->meta_ctrl |= (ena_tx_ctx->df << 455 ENA_ETH_IO_TX_DESC_DF_SHIFT) & 456 ENA_ETH_IO_TX_DESC_DF_MASK; 457 458 /* Bits 10-15 */ 459 desc->len_ctrl |= ((ena_tx_ctx->req_id >> 10) << 460 ENA_ETH_IO_TX_DESC_REQ_ID_HI_SHIFT) & 461 ENA_ETH_IO_TX_DESC_REQ_ID_HI_MASK; 462 463 if (ena_tx_ctx->meta_valid) { 464 desc->meta_ctrl |= (ena_tx_ctx->tso_enable << 465 ENA_ETH_IO_TX_DESC_TSO_EN_SHIFT) & 466 ENA_ETH_IO_TX_DESC_TSO_EN_MASK; 467 desc->meta_ctrl |= ena_tx_ctx->l3_proto & 468 ENA_ETH_IO_TX_DESC_L3_PROTO_IDX_MASK; 469 desc->meta_ctrl |= (ena_tx_ctx->l4_proto << 470 ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_SHIFT) & 471 ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_MASK; 472 desc->meta_ctrl |= (ena_tx_ctx->l3_csum_enable << 473 ENA_ETH_IO_TX_DESC_L3_CSUM_EN_SHIFT) & 474 ENA_ETH_IO_TX_DESC_L3_CSUM_EN_MASK; 475 desc->meta_ctrl |= (ena_tx_ctx->l4_csum_enable << 476 ENA_ETH_IO_TX_DESC_L4_CSUM_EN_SHIFT) & 477 ENA_ETH_IO_TX_DESC_L4_CSUM_EN_MASK; 478 desc->meta_ctrl |= (ena_tx_ctx->l4_csum_partial << 479 ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_SHIFT) & 480 ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_MASK; 481 } 482 483 for (i = 0; i < num_bufs; i++) { 484 /* The first desc share the same desc as the header */ 485 if (likely(i != 0)) { 486 rc = ena_com_sq_update_tail(io_sq); 487 if (unlikely(rc)) { 488 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 489 "Failed to update sq tail\n"); 490 return rc; 491 } 492 493 desc = get_sq_desc(io_sq); 494 if (unlikely(!desc)) 495 return -EFAULT; 496 497 memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc)); 498 499 desc->len_ctrl |= ((u32)io_sq->phase << 500 ENA_ETH_IO_TX_DESC_PHASE_SHIFT) & 501 ENA_ETH_IO_TX_DESC_PHASE_MASK; 502 } 503 504 desc->len_ctrl |= ena_bufs->len & 505 ENA_ETH_IO_TX_DESC_LENGTH_MASK; 506 507 addr_hi = ((ena_bufs->paddr & 508 GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32); 509 510 desc->buff_addr_lo = (u32)ena_bufs->paddr; 511 desc->buff_addr_hi_hdr_sz |= addr_hi & 512 ENA_ETH_IO_TX_DESC_ADDR_HI_MASK; 513 ena_bufs++; 514 } 515 516 /* set the last desc indicator */ 517 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK; 518 519 rc = ena_com_sq_update_tail(io_sq); 520 if (unlikely(rc)) { 521 netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 522 "Failed to update sq tail of the last descriptor\n"); 523 return rc; 524 } 525 526 rc = ena_com_close_bounce_buffer(io_sq); 527 528 *nb_hw_desc = io_sq->tail - start_tail; 529 return rc; 530} 531 532int ena_com_rx_pkt(struct ena_com_io_cq *io_cq, 533 struct ena_com_io_sq *io_sq, 534 struct ena_com_rx_ctx *ena_rx_ctx) 535{ 536 struct ena_com_rx_buf_info *ena_buf = &ena_rx_ctx->ena_bufs[0]; 537 struct ena_eth_io_rx_cdesc_base *cdesc = NULL; 538 u16 q_depth = io_cq->q_depth; 539 u16 cdesc_idx = 0; 540 u16 nb_hw_desc; 541 u16 i = 0; 542 543 WARN(io_cq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, "wrong Q type"); 544 545 nb_hw_desc = ena_com_cdesc_rx_pkt_get(io_cq, &cdesc_idx); 546 if (nb_hw_desc == 0) { 547 ena_rx_ctx->descs = nb_hw_desc; 548 return 0; 549 } 550 551 netdev_dbg(ena_com_io_cq_to_ena_dev(io_cq)->net_device, 552 "Fetch rx packet: queue %d completed desc: %d\n", io_cq->qid, nb_hw_desc); 553 554 if (unlikely(nb_hw_desc > ena_rx_ctx->max_bufs)) { 555 netdev_err(ena_com_io_cq_to_ena_dev(io_cq)->net_device, 556 "Too many RX cdescs (%d) > MAX(%d)\n", nb_hw_desc, ena_rx_ctx->max_bufs); 557 return -ENOSPC; 558 } 559 560 cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx); 561 ena_rx_ctx->pkt_offset = cdesc->offset; 562 563 do { 564 ena_buf[i].len = cdesc->length; 565 ena_buf[i].req_id = cdesc->req_id; 566 if (unlikely(ena_buf[i].req_id >= q_depth)) 567 return -EIO; 568 569 if (++i >= nb_hw_desc) 570 break; 571 572 cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i); 573 574 } while (1); 575 576 /* Update SQ head ptr */ 577 io_sq->next_to_comp += nb_hw_desc; 578 579 netdev_dbg(ena_com_io_cq_to_ena_dev(io_cq)->net_device, 580 "[%s][QID#%d] Updating SQ head to: %d\n", __func__, io_sq->qid, 581 io_sq->next_to_comp); 582 583 /* Get rx flags from the last pkt */ 584 ena_com_rx_set_flags(io_cq, ena_rx_ctx, cdesc); 585 586 ena_rx_ctx->descs = nb_hw_desc; 587 588 return 0; 589} 590 591int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq, 592 struct ena_com_buf *ena_buf, 593 u16 req_id) 594{ 595 struct ena_eth_io_rx_desc *desc; 596 597 WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, "wrong Q type"); 598 599 if (unlikely(!ena_com_sq_have_enough_space(io_sq, 1))) 600 return -ENOSPC; 601 602 desc = get_sq_desc(io_sq); 603 if (unlikely(!desc)) 604 return -EFAULT; 605 606 memset(desc, 0x0, sizeof(struct ena_eth_io_rx_desc)); 607 608 desc->length = ena_buf->len; 609 610 desc->ctrl = ENA_ETH_IO_RX_DESC_FIRST_MASK | 611 ENA_ETH_IO_RX_DESC_LAST_MASK | 612 ENA_ETH_IO_RX_DESC_COMP_REQ_MASK | 613 (io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK); 614 615 desc->req_id = req_id; 616 617 netdev_dbg(ena_com_io_sq_to_ena_dev(io_sq)->net_device, 618 "[%s] Adding single RX desc, Queue: %u, req_id: %u\n", __func__, io_sq->qid, 619 req_id); 620 621 desc->buff_addr_lo = (u32)ena_buf->paddr; 622 desc->buff_addr_hi = 623 ((ena_buf->paddr & GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32); 624 625 return ena_com_sq_update_tail(io_sq); 626} 627 628bool ena_com_cq_empty(struct ena_com_io_cq *io_cq) 629{ 630 struct ena_eth_io_rx_cdesc_base *cdesc; 631 632 cdesc = ena_com_get_next_rx_cdesc(io_cq); 633 if (cdesc) 634 return false; 635 else 636 return true; 637} 638