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sys/contrib/ena-com/ena_eth_com.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2015-2021 Amazon.com, Inc. or its affiliates. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of copyright holder nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "ena_eth_com.h" 35 36 static struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc( 37 struct ena_com_io_cq *io_cq) 38 { 39 struct ena_eth_io_rx_cdesc_base *cdesc; 40 u16 expected_phase, head_masked; 41 u16 desc_phase; 42 43 head_masked = io_cq->head & (io_cq->q_depth - 1); 44 expected_phase = io_cq->phase; 45 46 cdesc = (struct ena_eth_io_rx_cdesc_base *)(io_cq->cdesc_addr.virt_addr 47 + (head_masked * io_cq->cdesc_entry_size_in_bytes)); 48 49 desc_phase = (READ_ONCE32(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >> 50 ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT; 51 52 if (desc_phase != expected_phase) 53 return NULL; 54 55 /* Make sure we read the rest of the descriptor after the phase bit 56 * has been read 57 */ 58 dma_rmb(); 59 60 return cdesc; 61 } 62 63 static void *get_sq_desc_regular_queue(struct ena_com_io_sq *io_sq) 64 { 65 u16 tail_masked; 66 u32 offset; 67 68 tail_masked = io_sq->tail & (io_sq->q_depth - 1); 69 70 offset = tail_masked * io_sq->desc_entry_size; 71 72 return (void *)((uintptr_t)io_sq->desc_addr.virt_addr + offset); 73 } 74 75 static int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq, 76 u8 *bounce_buffer) 77 { 78 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 79 80 u16 dst_tail_mask; 81 u32 dst_offset; 82 83 dst_tail_mask = io_sq->tail & (io_sq->q_depth - 1); 84 dst_offset = dst_tail_mask * llq_info->desc_list_entry_size; 85 86 if (is_llq_max_tx_burst_exists(io_sq)) { 87 if (unlikely(!io_sq->entries_in_tx_burst_left)) { 88 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 89 "Error: trying to send more packets than tx burst allows\n"); 90 return ENA_COM_NO_SPACE; 91 } 92 93 io_sq->entries_in_tx_burst_left--; 94 ena_trc_dbg(ena_com_io_sq_to_ena_dev(io_sq), 95 "Decreasing entries_in_tx_burst_left of queue %d to %d\n", 96 io_sq->qid, io_sq->entries_in_tx_burst_left); 97 } 98 99 /* Make sure everything was written into the bounce buffer before 100 * writing the bounce buffer to the device 101 */ 102 wmb(); 103 104 /* The line is completed. Copy it to dev */ 105 ENA_MEMCPY_TO_DEVICE_64(io_sq->desc_addr.pbuf_dev_addr + dst_offset, 106 bounce_buffer, 107 llq_info->desc_list_entry_size); 108 109 io_sq->tail++; 110 111 /* Switch phase bit in case of wrap around */ 112 if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0)) 113 io_sq->phase ^= 1; 114 115 return ENA_COM_OK; 116 } 117 118 static int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq, 119 u8 *header_src, 120 u16 header_len) 121 { 122 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 123 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 124 u8 *bounce_buffer = pkt_ctrl->curr_bounce_buf; 125 u16 header_offset; 126 127 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)) 128 return 0; 129 130 header_offset = 131 llq_info->descs_num_before_header * io_sq->desc_entry_size; 132 133 if (unlikely((header_offset + header_len) > llq_info->desc_list_entry_size)) { 134 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 135 "Trying to write header larger than llq entry can accommodate\n"); 136 return ENA_COM_FAULT; 137 } 138 139 if (unlikely(!bounce_buffer)) { 140 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 141 "Bounce buffer is NULL\n"); 142 return ENA_COM_FAULT; 143 } 144 145 memcpy(bounce_buffer + header_offset, header_src, header_len); 146 147 return 0; 148 } 149 150 static void *get_sq_desc_llq(struct ena_com_io_sq *io_sq) 151 { 152 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 153 u8 *bounce_buffer; 154 void *sq_desc; 155 156 bounce_buffer = pkt_ctrl->curr_bounce_buf; 157 158 if (unlikely(!bounce_buffer)) { 159 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 160 "Bounce buffer is NULL\n"); 161 return NULL; 162 } 163 164 sq_desc = bounce_buffer + pkt_ctrl->idx * io_sq->desc_entry_size; 165 pkt_ctrl->idx++; 166 pkt_ctrl->descs_left_in_line--; 167 168 return sq_desc; 169 } 170 171 static int ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq) 172 { 173 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 174 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 175 int rc; 176 177 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)) 178 return ENA_COM_OK; 179 180 /* bounce buffer was used, so write it and get a new one */ 181 if (likely(pkt_ctrl->idx)) { 182 rc = ena_com_write_bounce_buffer_to_dev(io_sq, 183 pkt_ctrl->curr_bounce_buf); 184 if (unlikely(rc)) { 185 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 186 "Failed to write bounce buffer to device\n"); 187 return rc; 188 } 189 190 pkt_ctrl->curr_bounce_buf = 191 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl); 192 memset(io_sq->llq_buf_ctrl.curr_bounce_buf, 193 0x0, llq_info->desc_list_entry_size); 194 } 195 196 pkt_ctrl->idx = 0; 197 pkt_ctrl->descs_left_in_line = llq_info->descs_num_before_header; 198 return ENA_COM_OK; 199 } 200 201 static void *get_sq_desc(struct ena_com_io_sq *io_sq) 202 { 203 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) 204 return get_sq_desc_llq(io_sq); 205 206 return get_sq_desc_regular_queue(io_sq); 207 } 208 209 static int ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq) 210 { 211 struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl; 212 struct ena_com_llq_info *llq_info = &io_sq->llq_info; 213 int rc; 214 215 if (!pkt_ctrl->descs_left_in_line) { 216 rc = ena_com_write_bounce_buffer_to_dev(io_sq, 217 pkt_ctrl->curr_bounce_buf); 218 if (unlikely(rc)) { 219 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 220 "Failed to write bounce buffer to device\n"); 221 return rc; 222 } 223 224 pkt_ctrl->curr_bounce_buf = 225 ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl); 226 memset(io_sq->llq_buf_ctrl.curr_bounce_buf, 227 0x0, llq_info->desc_list_entry_size); 228 229 pkt_ctrl->idx = 0; 230 if (unlikely(llq_info->desc_stride_ctrl == ENA_ADMIN_SINGLE_DESC_PER_ENTRY)) 231 pkt_ctrl->descs_left_in_line = 1; 232 else 233 pkt_ctrl->descs_left_in_line = 234 llq_info->desc_list_entry_size / io_sq->desc_entry_size; 235 } 236 237 return ENA_COM_OK; 238 } 239 240 static int ena_com_sq_update_tail(struct ena_com_io_sq *io_sq) 241 { 242 if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) 243 return ena_com_sq_update_llq_tail(io_sq); 244 245 io_sq->tail++; 246 247 /* Switch phase bit in case of wrap around */ 248 if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0)) 249 io_sq->phase ^= 1; 250 251 return ENA_COM_OK; 252 } 253 254 static struct ena_eth_io_rx_cdesc_base * 255 ena_com_rx_cdesc_idx_to_ptr(struct ena_com_io_cq *io_cq, u16 idx) 256 { 257 idx &= (io_cq->q_depth - 1); 258 return (struct ena_eth_io_rx_cdesc_base *) 259 ((uintptr_t)io_cq->cdesc_addr.virt_addr + 260 idx * io_cq->cdesc_entry_size_in_bytes); 261 } 262 263 static u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq, 264 u16 *first_cdesc_idx) 265 { 266 struct ena_eth_io_rx_cdesc_base *cdesc; 267 u16 count = 0, head_masked; 268 u32 last = 0; 269 270 do { 271 cdesc = ena_com_get_next_rx_cdesc(io_cq); 272 if (!cdesc) 273 break; 274 275 ena_com_cq_inc_head(io_cq); 276 count++; 277 last = (READ_ONCE32(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >> 278 ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT; 279 } while (!last); 280 281 if (last) { 282 *first_cdesc_idx = io_cq->cur_rx_pkt_cdesc_start_idx; 283 count += io_cq->cur_rx_pkt_cdesc_count; 284 285 head_masked = io_cq->head & (io_cq->q_depth - 1); 286 287 io_cq->cur_rx_pkt_cdesc_count = 0; 288 io_cq->cur_rx_pkt_cdesc_start_idx = head_masked; 289 290 ena_trc_dbg(ena_com_io_cq_to_ena_dev(io_cq), 291 "ENA q_id: %d packets were completed. first desc idx %u descs# %d\n", 292 io_cq->qid, *first_cdesc_idx, count); 293 } else { 294 io_cq->cur_rx_pkt_cdesc_count += count; 295 count = 0; 296 } 297 298 return count; 299 } 300 301 static int ena_com_create_meta(struct ena_com_io_sq *io_sq, 302 struct ena_com_tx_meta *ena_meta) 303 { 304 struct ena_eth_io_tx_meta_desc *meta_desc = NULL; 305 306 meta_desc = get_sq_desc(io_sq); 307 if (unlikely(!meta_desc)) 308 return ENA_COM_FAULT; 309 310 memset(meta_desc, 0x0, sizeof(struct ena_eth_io_tx_meta_desc)); 311 312 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_DESC_MASK; 313 314 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_EXT_VALID_MASK; 315 316 /* bits 0-9 of the mss */ 317 meta_desc->word2 |= ((u32)ena_meta->mss << 318 ENA_ETH_IO_TX_META_DESC_MSS_LO_SHIFT) & 319 ENA_ETH_IO_TX_META_DESC_MSS_LO_MASK; 320 /* bits 10-13 of the mss */ 321 meta_desc->len_ctrl |= ((ena_meta->mss >> 10) << 322 ENA_ETH_IO_TX_META_DESC_MSS_HI_SHIFT) & 323 ENA_ETH_IO_TX_META_DESC_MSS_HI_MASK; 324 325 /* Extended meta desc */ 326 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_ETH_META_TYPE_MASK; 327 meta_desc->len_ctrl |= ((u32)io_sq->phase << 328 ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT) & 329 ENA_ETH_IO_TX_META_DESC_PHASE_MASK; 330 331 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_FIRST_MASK; 332 meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_STORE_MASK; 333 334 meta_desc->word2 |= ena_meta->l3_hdr_len & 335 ENA_ETH_IO_TX_META_DESC_L3_HDR_LEN_MASK; 336 meta_desc->word2 |= (ena_meta->l3_hdr_offset << 337 ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_SHIFT) & 338 ENA_ETH_IO_TX_META_DESC_L3_HDR_OFF_MASK; 339 340 meta_desc->word2 |= ((u32)ena_meta->l4_hdr_len << 341 ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_SHIFT) & 342 ENA_ETH_IO_TX_META_DESC_L4_HDR_LEN_IN_WORDS_MASK; 343 344 return ena_com_sq_update_tail(io_sq); 345 } 346 347 static int ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq, 348 struct ena_com_tx_ctx *ena_tx_ctx, 349 bool *have_meta) 350 { 351 struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta; 352 353 /* When disable meta caching is set, don't bother to save the meta and 354 * compare it to the stored version, just create the meta 355 */ 356 if (io_sq->disable_meta_caching) { 357 if (unlikely(!ena_tx_ctx->meta_valid)) 358 return ENA_COM_INVAL; 359 360 *have_meta = true; 361 return ena_com_create_meta(io_sq, ena_meta); 362 } 363 364 if (ena_com_meta_desc_changed(io_sq, ena_tx_ctx)) { 365 *have_meta = true; 366 /* Cache the meta desc */ 367 memcpy(&io_sq->cached_tx_meta, ena_meta, 368 sizeof(struct ena_com_tx_meta)); 369 return ena_com_create_meta(io_sq, ena_meta); 370 } 371 372 *have_meta = false; 373 return ENA_COM_OK; 374 } 375 376 static void ena_com_rx_set_flags(struct ena_com_io_cq *io_cq, 377 struct ena_com_rx_ctx *ena_rx_ctx, 378 struct ena_eth_io_rx_cdesc_base *cdesc) 379 { 380 ena_rx_ctx->l3_proto = cdesc->status & 381 ENA_ETH_IO_RX_CDESC_BASE_L3_PROTO_IDX_MASK; 382 ena_rx_ctx->l4_proto = 383 (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_MASK) >> 384 ENA_ETH_IO_RX_CDESC_BASE_L4_PROTO_IDX_SHIFT; 385 ena_rx_ctx->l3_csum_err = 386 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_MASK) >> 387 ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM_ERR_SHIFT); 388 ena_rx_ctx->l4_csum_err = 389 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK) >> 390 ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT); 391 ena_rx_ctx->l4_csum_checked = 392 !!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK) >> 393 ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT); 394 ena_rx_ctx->hash = cdesc->hash; 395 ena_rx_ctx->frag = 396 (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >> 397 ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT; 398 399 ena_trc_dbg(ena_com_io_cq_to_ena_dev(io_cq), 400 "l3_proto %d l4_proto %d l3_csum_err %d l4_csum_err %d hash %d frag %d cdesc_status %x\n", 401 ena_rx_ctx->l3_proto, 402 ena_rx_ctx->l4_proto, 403 ena_rx_ctx->l3_csum_err, 404 ena_rx_ctx->l4_csum_err, 405 ena_rx_ctx->hash, 406 ena_rx_ctx->frag, 407 cdesc->status); 408 } 409 410 /*****************************************************************************/ 411 /***************************** API **********************************/ 412 /*****************************************************************************/ 413 414 int ena_com_prepare_tx(struct ena_com_io_sq *io_sq, 415 struct ena_com_tx_ctx *ena_tx_ctx, 416 int *nb_hw_desc) 417 { 418 struct ena_eth_io_tx_desc *desc = NULL; 419 struct ena_com_buf *ena_bufs = ena_tx_ctx->ena_bufs; 420 void *buffer_to_push = ena_tx_ctx->push_header; 421 u16 header_len = ena_tx_ctx->header_len; 422 u16 num_bufs = ena_tx_ctx->num_bufs; 423 u16 start_tail = io_sq->tail; 424 int i, rc; 425 bool have_meta; 426 u64 addr_hi; 427 428 ENA_WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_TX, 429 ena_com_io_sq_to_ena_dev(io_sq), "wrong Q type"); 430 431 /* num_bufs +1 for potential meta desc */ 432 if (unlikely(!ena_com_sq_have_enough_space(io_sq, num_bufs + 1))) { 433 ena_trc_dbg(ena_com_io_sq_to_ena_dev(io_sq), 434 "Not enough space in the tx queue\n"); 435 return ENA_COM_NO_MEM; 436 } 437 438 if (unlikely(header_len > io_sq->tx_max_header_size)) { 439 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 440 "Header size is too large %d max header: %d\n", 441 header_len, io_sq->tx_max_header_size); 442 return ENA_COM_INVAL; 443 } 444 445 if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV 446 && !buffer_to_push)) { 447 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 448 "Push header wasn't provided on LLQ mode\n"); 449 return ENA_COM_INVAL; 450 } 451 452 rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len); 453 if (unlikely(rc)) 454 return rc; 455 456 rc = ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx, &have_meta); 457 if (unlikely(rc)) { 458 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 459 "Failed to create and store tx meta desc\n"); 460 return rc; 461 } 462 463 /* If the caller doesn't want to send packets */ 464 if (unlikely(!num_bufs && !header_len)) { 465 rc = ena_com_close_bounce_buffer(io_sq); 466 if (rc) 467 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 468 "Failed to write buffers to LLQ\n"); 469 *nb_hw_desc = io_sq->tail - start_tail; 470 return rc; 471 } 472 473 desc = get_sq_desc(io_sq); 474 if (unlikely(!desc)) 475 return ENA_COM_FAULT; 476 memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc)); 477 478 /* Set first desc when we don't have meta descriptor */ 479 if (!have_meta) 480 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_FIRST_MASK; 481 482 desc->buff_addr_hi_hdr_sz |= ((u32)header_len << 483 ENA_ETH_IO_TX_DESC_HEADER_LENGTH_SHIFT) & 484 ENA_ETH_IO_TX_DESC_HEADER_LENGTH_MASK; 485 desc->len_ctrl |= ((u32)io_sq->phase << ENA_ETH_IO_TX_DESC_PHASE_SHIFT) & 486 ENA_ETH_IO_TX_DESC_PHASE_MASK; 487 488 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_COMP_REQ_MASK; 489 490 /* Bits 0-9 */ 491 desc->meta_ctrl |= ((u32)ena_tx_ctx->req_id << 492 ENA_ETH_IO_TX_DESC_REQ_ID_LO_SHIFT) & 493 ENA_ETH_IO_TX_DESC_REQ_ID_LO_MASK; 494 495 desc->meta_ctrl |= (ena_tx_ctx->df << 496 ENA_ETH_IO_TX_DESC_DF_SHIFT) & 497 ENA_ETH_IO_TX_DESC_DF_MASK; 498 499 /* Bits 10-15 */ 500 desc->len_ctrl |= ((ena_tx_ctx->req_id >> 10) << 501 ENA_ETH_IO_TX_DESC_REQ_ID_HI_SHIFT) & 502 ENA_ETH_IO_TX_DESC_REQ_ID_HI_MASK; 503 504 if (ena_tx_ctx->meta_valid) { 505 desc->meta_ctrl |= (ena_tx_ctx->tso_enable << 506 ENA_ETH_IO_TX_DESC_TSO_EN_SHIFT) & 507 ENA_ETH_IO_TX_DESC_TSO_EN_MASK; 508 desc->meta_ctrl |= ena_tx_ctx->l3_proto & 509 ENA_ETH_IO_TX_DESC_L3_PROTO_IDX_MASK; 510 desc->meta_ctrl |= (ena_tx_ctx->l4_proto << 511 ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_SHIFT) & 512 ENA_ETH_IO_TX_DESC_L4_PROTO_IDX_MASK; 513 desc->meta_ctrl |= (ena_tx_ctx->l3_csum_enable << 514 ENA_ETH_IO_TX_DESC_L3_CSUM_EN_SHIFT) & 515 ENA_ETH_IO_TX_DESC_L3_CSUM_EN_MASK; 516 desc->meta_ctrl |= (ena_tx_ctx->l4_csum_enable << 517 ENA_ETH_IO_TX_DESC_L4_CSUM_EN_SHIFT) & 518 ENA_ETH_IO_TX_DESC_L4_CSUM_EN_MASK; 519 desc->meta_ctrl |= (ena_tx_ctx->l4_csum_partial << 520 ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_SHIFT) & 521 ENA_ETH_IO_TX_DESC_L4_CSUM_PARTIAL_MASK; 522 } 523 524 for (i = 0; i < num_bufs; i++) { 525 /* The first desc share the same desc as the header */ 526 if (likely(i != 0)) { 527 rc = ena_com_sq_update_tail(io_sq); 528 if (unlikely(rc)) { 529 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 530 "Failed to update sq tail\n"); 531 return rc; 532 } 533 534 desc = get_sq_desc(io_sq); 535 if (unlikely(!desc)) 536 return ENA_COM_FAULT; 537 538 memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc)); 539 540 desc->len_ctrl |= ((u32)io_sq->phase << 541 ENA_ETH_IO_TX_DESC_PHASE_SHIFT) & 542 ENA_ETH_IO_TX_DESC_PHASE_MASK; 543 } 544 545 desc->len_ctrl |= ena_bufs->len & 546 ENA_ETH_IO_TX_DESC_LENGTH_MASK; 547 548 addr_hi = ((ena_bufs->paddr & 549 GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32); 550 551 desc->buff_addr_lo = (u32)ena_bufs->paddr; 552 desc->buff_addr_hi_hdr_sz |= addr_hi & 553 ENA_ETH_IO_TX_DESC_ADDR_HI_MASK; 554 ena_bufs++; 555 } 556 557 /* set the last desc indicator */ 558 desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK; 559 560 rc = ena_com_sq_update_tail(io_sq); 561 if (unlikely(rc)) { 562 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 563 "Failed to update sq tail of the last descriptor\n"); 564 return rc; 565 } 566 567 rc = ena_com_close_bounce_buffer(io_sq); 568 if (rc) 569 ena_trc_err(ena_com_io_sq_to_ena_dev(io_sq), 570 "Failed when closing bounce buffer\n"); 571 572 *nb_hw_desc = io_sq->tail - start_tail; 573 return rc; 574 } 575 576 int ena_com_rx_pkt(struct ena_com_io_cq *io_cq, 577 struct ena_com_io_sq *io_sq, 578 struct ena_com_rx_ctx *ena_rx_ctx) 579 { 580 struct ena_com_rx_buf_info *ena_buf = &ena_rx_ctx->ena_bufs[0]; 581 struct ena_eth_io_rx_cdesc_base *cdesc = NULL; 582 u16 q_depth = io_cq->q_depth; 583 u16 cdesc_idx = 0; 584 u16 nb_hw_desc; 585 u16 i = 0; 586 587 ENA_WARN(io_cq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, 588 ena_com_io_cq_to_ena_dev(io_cq), "wrong Q type"); 589 590 nb_hw_desc = ena_com_cdesc_rx_pkt_get(io_cq, &cdesc_idx); 591 if (nb_hw_desc == 0) { 592 ena_rx_ctx->descs = nb_hw_desc; 593 return 0; 594 } 595 596 ena_trc_dbg(ena_com_io_cq_to_ena_dev(io_cq), 597 "Fetch rx packet: queue %d completed desc: %d\n", 598 io_cq->qid, nb_hw_desc); 599 600 if (unlikely(nb_hw_desc > ena_rx_ctx->max_bufs)) { 601 ena_trc_err(ena_com_io_cq_to_ena_dev(io_cq), 602 "Too many RX cdescs (%d) > MAX(%d)\n", 603 nb_hw_desc, ena_rx_ctx->max_bufs); 604 return ENA_COM_NO_SPACE; 605 } 606 607 cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx); 608 ena_rx_ctx->pkt_offset = cdesc->offset; 609 610 do { 611 ena_buf[i].len = cdesc->length; 612 ena_buf[i].req_id = cdesc->req_id; 613 if (unlikely(ena_buf[i].req_id >= q_depth)) 614 return ENA_COM_EIO; 615 616 if (++i >= nb_hw_desc) 617 break; 618 619 cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i); 620 621 } while (1); 622 623 /* Update SQ head ptr */ 624 io_sq->next_to_comp += nb_hw_desc; 625 626 ena_trc_dbg(ena_com_io_cq_to_ena_dev(io_cq), 627 "[%s][QID#%d] Updating SQ head to: %d\n", __func__, 628 io_sq->qid, io_sq->next_to_comp); 629 630 /* Get rx flags from the last pkt */ 631 ena_com_rx_set_flags(io_cq, ena_rx_ctx, cdesc); 632 633 ena_rx_ctx->descs = nb_hw_desc; 634 635 return 0; 636 } 637 638 int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq, 639 struct ena_com_buf *ena_buf, 640 u16 req_id) 641 { 642 struct ena_eth_io_rx_desc *desc; 643 644 ENA_WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, 645 ena_com_io_sq_to_ena_dev(io_sq), "wrong Q type"); 646 647 if (unlikely(!ena_com_sq_have_enough_space(io_sq, 1))) 648 return ENA_COM_NO_SPACE; 649 650 desc = get_sq_desc(io_sq); 651 if (unlikely(!desc)) 652 return ENA_COM_FAULT; 653 654 memset(desc, 0x0, sizeof(struct ena_eth_io_rx_desc)); 655 656 desc->length = ena_buf->len; 657 658 desc->ctrl = ENA_ETH_IO_RX_DESC_FIRST_MASK | 659 ENA_ETH_IO_RX_DESC_LAST_MASK | 660 ENA_ETH_IO_RX_DESC_COMP_REQ_MASK | 661 (io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK); 662 663 desc->req_id = req_id; 664 665 ena_trc_dbg(ena_com_io_sq_to_ena_dev(io_sq), 666 "[%s] Adding single RX desc, Queue: %u, req_id: %u\n", 667 __func__, io_sq->qid, req_id); 668 669 desc->buff_addr_lo = (u32)ena_buf->paddr; 670 desc->buff_addr_hi = 671 ((ena_buf->paddr & GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32); 672 673 return ena_com_sq_update_tail(io_sq); 674 } 675 676 bool ena_com_cq_empty(struct ena_com_io_cq *io_cq) 677 { 678 struct ena_eth_io_rx_cdesc_base *cdesc; 679 680 cdesc = ena_com_get_next_rx_cdesc(io_cq); 681 if (cdesc) 682 return false; 683 else 684 return true; 685 }
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