1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2018-2022 Advanced Micro Devices, Inc. 3 */ 4 5 #include <sys/queue.h> 6 #include <stdio.h> 7 #include <stdlib.h> 8 #include <string.h> 9 #include <errno.h> 10 #include <stdint.h> 11 #include <stdarg.h> 12 #include <unistd.h> 13 #include <inttypes.h> 14 15 #include <rte_byteorder.h> 16 #include <rte_common.h> 17 #include <rte_cycles.h> 18 #include <rte_log.h> 19 #include <rte_debug.h> 20 #include <rte_interrupts.h> 21 #include <rte_pci.h> 22 #include <rte_memory.h> 23 #include <rte_memzone.h> 24 #include <rte_launch.h> 25 #include <rte_eal.h> 26 #include <rte_per_lcore.h> 27 #include <rte_lcore.h> 28 #include <rte_atomic.h> 29 #include <rte_branch_prediction.h> 30 #include <rte_mempool.h> 31 #include <rte_malloc.h> 32 #include <rte_mbuf.h> 33 #include <rte_ether.h> 34 #include <ethdev_driver.h> 35 #include <rte_prefetch.h> 36 #include <rte_udp.h> 37 #include <rte_tcp.h> 38 #include <rte_sctp.h> 39 #include <rte_string_fns.h> 40 #include <rte_errno.h> 41 #include <rte_ip.h> 42 #include <rte_net.h> 43 44 #include "ionic_logs.h" 45 #include "ionic_mac_api.h" 46 #include "ionic_ethdev.h" 47 #include "ionic_lif.h" 48 #include "ionic_rxtx.h" 49 50 static void 51 ionic_empty_array(void **array, uint32_t cnt, uint16_t idx) 52 { 53 uint32_t i; 54 55 for (i = idx; i < cnt; i++) 56 if (array[i]) 57 rte_pktmbuf_free_seg(array[i]); 58 59 memset(array, 0, sizeof(void *) * cnt); 60 } 61 62 static void __rte_cold 63 ionic_tx_empty(struct ionic_tx_qcq *txq) 64 { 65 struct ionic_queue *q = &txq->qcq.q; 66 67 ionic_empty_array(q->info, q->num_descs, 0); 68 } 69 70 static void __rte_cold 71 ionic_rx_empty(struct ionic_rx_qcq *rxq) 72 { 73 struct ionic_queue *q = &rxq->qcq.q; 74 75 ionic_empty_array(q->info, q->num_descs, 0); 76 } 77 78 /********************************************************************* 79 * 80 * TX functions 81 * 82 **********************************************************************/ 83 84 void 85 ionic_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id, 86 struct rte_eth_txq_info *qinfo) 87 { 88 struct ionic_tx_qcq *txq = dev->data->tx_queues[queue_id]; 89 struct ionic_queue *q = &txq->qcq.q; 90 91 qinfo->nb_desc = q->num_descs; 92 qinfo->conf.offloads = dev->data->dev_conf.txmode.offloads; 93 qinfo->conf.tx_deferred_start = txq->flags & IONIC_QCQ_F_DEFERRED; 94 } 95 96 static __rte_always_inline void 97 ionic_tx_flush(struct ionic_tx_qcq *txq) 98 { 99 struct ionic_cq *cq = &txq->qcq.cq; 100 struct ionic_queue *q = &txq->qcq.q; 101 struct rte_mbuf *txm, *next; 102 struct ionic_txq_comp *cq_desc_base = cq->base; 103 struct ionic_txq_comp *cq_desc; 104 void **info; 105 u_int32_t comp_index = (u_int32_t)-1; 106 107 cq_desc = &cq_desc_base[cq->tail_idx]; 108 while (color_match(cq_desc->color, cq->done_color)) { 109 cq->tail_idx = Q_NEXT_TO_SRVC(cq, 1); 110 111 /* Prefetch the next 4 descriptors (not really useful here) */ 112 if ((cq->tail_idx & 0x3) == 0) 113 rte_prefetch0(&cq_desc_base[cq->tail_idx]); 114 115 if (cq->tail_idx == 0) 116 cq->done_color = !cq->done_color; 117 118 comp_index = cq_desc->comp_index; 119 120 cq_desc = &cq_desc_base[cq->tail_idx]; 121 } 122 123 if (comp_index != (u_int32_t)-1) { 124 while (q->tail_idx != comp_index) { 125 info = IONIC_INFO_PTR(q, q->tail_idx); 126 127 q->tail_idx = Q_NEXT_TO_SRVC(q, 1); 128 129 /* Prefetch the next 4 descriptors */ 130 if ((q->tail_idx & 0x3) == 0) 131 /* q desc info */ 132 rte_prefetch0(&q->info[q->tail_idx]); 133 134 /* 135 * Note: you can just use rte_pktmbuf_free, 136 * but this loop is faster 137 */ 138 txm = info[0]; 139 while (txm != NULL) { 140 next = txm->next; 141 rte_pktmbuf_free_seg(txm); 142 txm = next; 143 } 144 } 145 } 146 } 147 148 void __rte_cold 149 ionic_dev_tx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 150 { 151 struct ionic_tx_qcq *txq = dev->data->tx_queues[qid]; 152 153 IONIC_PRINT_CALL(); 154 155 ionic_qcq_free(&txq->qcq); 156 } 157 158 int __rte_cold 159 ionic_dev_tx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id) 160 { 161 struct ionic_tx_stats *stats; 162 struct ionic_tx_qcq *txq; 163 164 IONIC_PRINT(DEBUG, "Stopping TX queue %u", tx_queue_id); 165 166 txq = eth_dev->data->tx_queues[tx_queue_id]; 167 168 eth_dev->data->tx_queue_state[tx_queue_id] = 169 RTE_ETH_QUEUE_STATE_STOPPED; 170 171 /* 172 * Note: we should better post NOP Tx desc and wait for its completion 173 * before disabling Tx queue 174 */ 175 176 ionic_lif_txq_deinit(txq); 177 178 /* Free all buffers from descriptor ring */ 179 ionic_tx_empty(txq); 180 181 stats = &txq->stats; 182 IONIC_PRINT(DEBUG, "TX queue %u pkts %ju tso %ju", 183 txq->qcq.q.index, stats->packets, stats->tso); 184 185 return 0; 186 } 187 188 int __rte_cold 189 ionic_dev_tx_queue_setup(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id, 190 uint16_t nb_desc, uint32_t socket_id, 191 const struct rte_eth_txconf *tx_conf) 192 { 193 struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev); 194 struct ionic_tx_qcq *txq; 195 uint64_t offloads; 196 int err; 197 198 if (tx_queue_id >= lif->ntxqcqs) { 199 IONIC_PRINT(DEBUG, "Queue index %u not available " 200 "(max %u queues)", 201 tx_queue_id, lif->ntxqcqs); 202 return -EINVAL; 203 } 204 205 offloads = tx_conf->offloads | eth_dev->data->dev_conf.txmode.offloads; 206 IONIC_PRINT(DEBUG, 207 "Configuring skt %u TX queue %u with %u buffers, offloads %jx", 208 socket_id, tx_queue_id, nb_desc, offloads); 209 210 /* Validate number of receive descriptors */ 211 if (!rte_is_power_of_2(nb_desc) || nb_desc < IONIC_MIN_RING_DESC) 212 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */ 213 214 /* Free memory prior to re-allocation if needed... */ 215 if (eth_dev->data->tx_queues[tx_queue_id] != NULL) { 216 ionic_dev_tx_queue_release(eth_dev, tx_queue_id); 217 eth_dev->data->tx_queues[tx_queue_id] = NULL; 218 } 219 220 eth_dev->data->tx_queue_state[tx_queue_id] = 221 RTE_ETH_QUEUE_STATE_STOPPED; 222 223 err = ionic_tx_qcq_alloc(lif, socket_id, tx_queue_id, nb_desc, &txq); 224 if (err) { 225 IONIC_PRINT(DEBUG, "Queue allocation failure"); 226 return -EINVAL; 227 } 228 229 /* Do not start queue with rte_eth_dev_start() */ 230 if (tx_conf->tx_deferred_start) 231 txq->flags |= IONIC_QCQ_F_DEFERRED; 232 233 /* Convert the offload flags into queue flags */ 234 if (offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) 235 txq->flags |= IONIC_QCQ_F_CSUM_L3; 236 if (offloads & RTE_ETH_TX_OFFLOAD_TCP_CKSUM) 237 txq->flags |= IONIC_QCQ_F_CSUM_TCP; 238 if (offloads & RTE_ETH_TX_OFFLOAD_UDP_CKSUM) 239 txq->flags |= IONIC_QCQ_F_CSUM_UDP; 240 241 eth_dev->data->tx_queues[tx_queue_id] = txq; 242 243 return 0; 244 } 245 246 /* 247 * Start Transmit Units for specified queue. 248 */ 249 int __rte_cold 250 ionic_dev_tx_queue_start(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id) 251 { 252 uint8_t *tx_queue_state = eth_dev->data->tx_queue_state; 253 struct ionic_tx_qcq *txq; 254 int err; 255 256 if (tx_queue_state[tx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) { 257 IONIC_PRINT(DEBUG, "TX queue %u already started", 258 tx_queue_id); 259 return 0; 260 } 261 262 txq = eth_dev->data->tx_queues[tx_queue_id]; 263 264 IONIC_PRINT(DEBUG, "Starting TX queue %u, %u descs", 265 tx_queue_id, txq->qcq.q.num_descs); 266 267 err = ionic_lif_txq_init(txq); 268 if (err) 269 return err; 270 271 tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED; 272 273 return 0; 274 } 275 276 static void 277 ionic_tx_tcp_pseudo_csum(struct rte_mbuf *txm) 278 { 279 struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *); 280 char *l3_hdr = ((char *)eth_hdr) + txm->l2_len; 281 struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *) 282 (l3_hdr + txm->l3_len); 283 284 if (txm->ol_flags & RTE_MBUF_F_TX_IP_CKSUM) { 285 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr; 286 ipv4_hdr->hdr_checksum = 0; 287 tcp_hdr->cksum = 0; 288 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr); 289 } else { 290 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr; 291 tcp_hdr->cksum = 0; 292 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr); 293 } 294 } 295 296 static void 297 ionic_tx_tcp_inner_pseudo_csum(struct rte_mbuf *txm) 298 { 299 struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *); 300 char *l3_hdr = ((char *)eth_hdr) + txm->outer_l2_len + 301 txm->outer_l3_len + txm->l2_len; 302 struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *) 303 (l3_hdr + txm->l3_len); 304 305 if (txm->ol_flags & RTE_MBUF_F_TX_IPV4) { 306 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr; 307 ipv4_hdr->hdr_checksum = 0; 308 tcp_hdr->cksum = 0; 309 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr); 310 } else { 311 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr; 312 tcp_hdr->cksum = 0; 313 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr); 314 } 315 } 316 317 static void 318 ionic_tx_tso_post(struct ionic_queue *q, struct ionic_txq_desc *desc, 319 struct rte_mbuf *txm, 320 rte_iova_t addr, uint8_t nsge, uint16_t len, 321 uint32_t hdrlen, uint32_t mss, 322 bool encap, 323 uint16_t vlan_tci, bool has_vlan, 324 bool start, bool done) 325 { 326 void **info; 327 uint64_t cmd; 328 uint8_t flags = 0; 329 flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0; 330 flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0; 331 flags |= start ? IONIC_TXQ_DESC_FLAG_TSO_SOT : 0; 332 flags |= done ? IONIC_TXQ_DESC_FLAG_TSO_EOT : 0; 333 334 cmd = encode_txq_desc_cmd(IONIC_TXQ_DESC_OPCODE_TSO, 335 flags, nsge, addr); 336 desc->cmd = rte_cpu_to_le_64(cmd); 337 desc->len = rte_cpu_to_le_16(len); 338 desc->vlan_tci = rte_cpu_to_le_16(vlan_tci); 339 desc->hdr_len = rte_cpu_to_le_16(hdrlen); 340 desc->mss = rte_cpu_to_le_16(mss); 341 342 if (done) { 343 info = IONIC_INFO_PTR(q, q->head_idx); 344 info[0] = txm; 345 } 346 347 q->head_idx = Q_NEXT_TO_POST(q, 1); 348 } 349 350 static struct ionic_txq_desc * 351 ionic_tx_tso_next(struct ionic_tx_qcq *txq, struct ionic_txq_sg_elem **elem) 352 { 353 struct ionic_queue *q = &txq->qcq.q; 354 struct ionic_txq_desc *desc_base = q->base; 355 struct ionic_txq_sg_desc_v1 *sg_desc_base = q->sg_base; 356 struct ionic_txq_desc *desc = &desc_base[q->head_idx]; 357 struct ionic_txq_sg_desc_v1 *sg_desc = &sg_desc_base[q->head_idx]; 358 359 *elem = sg_desc->elems; 360 return desc; 361 } 362 363 static int 364 ionic_tx_tso(struct ionic_tx_qcq *txq, struct rte_mbuf *txm) 365 { 366 struct ionic_queue *q = &txq->qcq.q; 367 struct ionic_tx_stats *stats = &txq->stats; 368 struct ionic_txq_desc *desc; 369 struct ionic_txq_sg_elem *elem; 370 struct rte_mbuf *txm_seg; 371 rte_iova_t data_iova; 372 uint64_t desc_addr = 0, next_addr; 373 uint16_t desc_len = 0; 374 uint8_t desc_nsge; 375 uint32_t hdrlen; 376 uint32_t mss = txm->tso_segsz; 377 uint32_t frag_left = 0; 378 uint32_t left; 379 uint32_t seglen; 380 uint32_t len; 381 uint32_t offset = 0; 382 bool start, done; 383 bool encap; 384 bool has_vlan = !!(txm->ol_flags & RTE_MBUF_F_TX_VLAN); 385 uint16_t vlan_tci = txm->vlan_tci; 386 uint64_t ol_flags = txm->ol_flags; 387 388 encap = ((ol_flags & RTE_MBUF_F_TX_OUTER_IP_CKSUM) || 389 (ol_flags & RTE_MBUF_F_TX_OUTER_UDP_CKSUM)) && 390 ((ol_flags & RTE_MBUF_F_TX_OUTER_IPV4) || 391 (ol_flags & RTE_MBUF_F_TX_OUTER_IPV6)); 392 393 /* Preload inner-most TCP csum field with IP pseudo hdr 394 * calculated with IP length set to zero. HW will later 395 * add in length to each TCP segment resulting from the TSO. 396 */ 397 398 if (encap) { 399 ionic_tx_tcp_inner_pseudo_csum(txm); 400 hdrlen = txm->outer_l2_len + txm->outer_l3_len + 401 txm->l2_len + txm->l3_len + txm->l4_len; 402 } else { 403 ionic_tx_tcp_pseudo_csum(txm); 404 hdrlen = txm->l2_len + txm->l3_len + txm->l4_len; 405 } 406 407 seglen = hdrlen + mss; 408 left = txm->data_len; 409 data_iova = rte_mbuf_data_iova(txm); 410 411 desc = ionic_tx_tso_next(txq, &elem); 412 start = true; 413 414 /* Chop data up into desc segments */ 415 416 while (left > 0) { 417 len = RTE_MIN(seglen, left); 418 frag_left = seglen - len; 419 desc_addr = rte_cpu_to_le_64(data_iova + offset); 420 desc_len = len; 421 desc_nsge = 0; 422 left -= len; 423 offset += len; 424 if (txm->nb_segs > 1 && frag_left > 0) 425 continue; 426 done = (txm->nb_segs == 1 && left == 0); 427 ionic_tx_tso_post(q, desc, txm, 428 desc_addr, desc_nsge, desc_len, 429 hdrlen, mss, 430 encap, 431 vlan_tci, has_vlan, 432 start, done); 433 desc = ionic_tx_tso_next(txq, &elem); 434 start = false; 435 seglen = mss; 436 } 437 438 /* Chop frags into desc segments */ 439 440 txm_seg = txm->next; 441 while (txm_seg != NULL) { 442 offset = 0; 443 data_iova = rte_mbuf_data_iova(txm_seg); 444 left = txm_seg->data_len; 445 446 while (left > 0) { 447 next_addr = rte_cpu_to_le_64(data_iova + offset); 448 if (frag_left > 0) { 449 len = RTE_MIN(frag_left, left); 450 frag_left -= len; 451 elem->addr = next_addr; 452 elem->len = rte_cpu_to_le_16(len); 453 elem++; 454 desc_nsge++; 455 } else { 456 len = RTE_MIN(mss, left); 457 frag_left = mss - len; 458 desc_addr = next_addr; 459 desc_len = len; 460 desc_nsge = 0; 461 } 462 left -= len; 463 offset += len; 464 if (txm_seg->next != NULL && frag_left > 0) 465 continue; 466 467 done = (txm_seg->next == NULL && left == 0); 468 ionic_tx_tso_post(q, desc, txm_seg, 469 desc_addr, desc_nsge, desc_len, 470 hdrlen, mss, 471 encap, 472 vlan_tci, has_vlan, 473 start, done); 474 desc = ionic_tx_tso_next(txq, &elem); 475 start = false; 476 } 477 478 txm_seg = txm_seg->next; 479 } 480 481 stats->tso++; 482 483 return 0; 484 } 485 486 static __rte_always_inline int 487 ionic_tx(struct ionic_tx_qcq *txq, struct rte_mbuf *txm) 488 { 489 struct ionic_queue *q = &txq->qcq.q; 490 struct ionic_txq_desc *desc, *desc_base = q->base; 491 struct ionic_txq_sg_desc_v1 *sg_desc_base = q->sg_base; 492 struct ionic_txq_sg_elem *elem; 493 struct ionic_tx_stats *stats = &txq->stats; 494 struct rte_mbuf *txm_seg; 495 void **info; 496 bool encap; 497 bool has_vlan; 498 uint64_t ol_flags = txm->ol_flags; 499 uint64_t addr, cmd; 500 uint8_t opcode = IONIC_TXQ_DESC_OPCODE_CSUM_NONE; 501 uint8_t flags = 0; 502 503 desc = &desc_base[q->head_idx]; 504 info = IONIC_INFO_PTR(q, q->head_idx); 505 506 if ((ol_flags & RTE_MBUF_F_TX_IP_CKSUM) && 507 (txq->flags & IONIC_QCQ_F_CSUM_L3)) { 508 opcode = IONIC_TXQ_DESC_OPCODE_CSUM_HW; 509 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L3; 510 } 511 512 if (((ol_flags & RTE_MBUF_F_TX_TCP_CKSUM) && 513 (txq->flags & IONIC_QCQ_F_CSUM_TCP)) || 514 ((ol_flags & RTE_MBUF_F_TX_UDP_CKSUM) && 515 (txq->flags & IONIC_QCQ_F_CSUM_UDP))) { 516 opcode = IONIC_TXQ_DESC_OPCODE_CSUM_HW; 517 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L4; 518 } 519 520 if (opcode == IONIC_TXQ_DESC_OPCODE_CSUM_NONE) 521 stats->no_csum++; 522 523 has_vlan = (ol_flags & RTE_MBUF_F_TX_VLAN); 524 encap = ((ol_flags & RTE_MBUF_F_TX_OUTER_IP_CKSUM) || 525 (ol_flags & RTE_MBUF_F_TX_OUTER_UDP_CKSUM)) && 526 ((ol_flags & RTE_MBUF_F_TX_OUTER_IPV4) || 527 (ol_flags & RTE_MBUF_F_TX_OUTER_IPV6)); 528 529 flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0; 530 flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0; 531 532 addr = rte_cpu_to_le_64(rte_mbuf_data_iova(txm)); 533 534 cmd = encode_txq_desc_cmd(opcode, flags, txm->nb_segs - 1, addr); 535 desc->cmd = rte_cpu_to_le_64(cmd); 536 desc->len = rte_cpu_to_le_16(txm->data_len); 537 desc->vlan_tci = rte_cpu_to_le_16(txm->vlan_tci); 538 539 info[0] = txm; 540 541 elem = sg_desc_base[q->head_idx].elems; 542 543 txm_seg = txm->next; 544 while (txm_seg != NULL) { 545 elem->len = rte_cpu_to_le_16(txm_seg->data_len); 546 elem->addr = rte_cpu_to_le_64(rte_mbuf_data_iova(txm_seg)); 547 elem++; 548 txm_seg = txm_seg->next; 549 } 550 551 q->head_idx = Q_NEXT_TO_POST(q, 1); 552 553 return 0; 554 } 555 556 uint16_t 557 ionic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, 558 uint16_t nb_pkts) 559 { 560 struct ionic_tx_qcq *txq = tx_queue; 561 struct ionic_queue *q = &txq->qcq.q; 562 struct ionic_tx_stats *stats = &txq->stats; 563 uint32_t next_q_head_idx; 564 uint32_t bytes_tx = 0; 565 uint16_t nb_avail, nb_tx = 0; 566 int err; 567 568 /* Cleaning old buffers */ 569 ionic_tx_flush(txq); 570 571 nb_avail = ionic_q_space_avail(q); 572 if (unlikely(nb_avail < nb_pkts)) { 573 stats->stop += nb_pkts - nb_avail; 574 nb_pkts = nb_avail; 575 } 576 577 while (nb_tx < nb_pkts) { 578 next_q_head_idx = Q_NEXT_TO_POST(q, 1); 579 if ((next_q_head_idx & 0x3) == 0) { 580 struct ionic_txq_desc *desc_base = q->base; 581 rte_prefetch0(&desc_base[next_q_head_idx]); 582 rte_prefetch0(&q->info[next_q_head_idx]); 583 } 584 585 if (tx_pkts[nb_tx]->ol_flags & RTE_MBUF_F_TX_TCP_SEG) 586 err = ionic_tx_tso(txq, tx_pkts[nb_tx]); 587 else 588 err = ionic_tx(txq, tx_pkts[nb_tx]); 589 if (err) { 590 stats->drop += nb_pkts - nb_tx; 591 break; 592 } 593 594 bytes_tx += tx_pkts[nb_tx]->pkt_len; 595 nb_tx++; 596 } 597 598 if (nb_tx > 0) { 599 rte_wmb(); 600 ionic_q_flush(q); 601 } 602 603 stats->packets += nb_tx; 604 stats->bytes += bytes_tx; 605 606 return nb_tx; 607 } 608 609 /********************************************************************* 610 * 611 * TX prep functions 612 * 613 **********************************************************************/ 614 615 #define IONIC_TX_OFFLOAD_MASK (RTE_MBUF_F_TX_IPV4 | \ 616 RTE_MBUF_F_TX_IPV6 | \ 617 RTE_MBUF_F_TX_VLAN | \ 618 RTE_MBUF_F_TX_IP_CKSUM | \ 619 RTE_MBUF_F_TX_TCP_SEG | \ 620 RTE_MBUF_F_TX_L4_MASK) 621 622 #define IONIC_TX_OFFLOAD_NOTSUP_MASK \ 623 (RTE_MBUF_F_TX_OFFLOAD_MASK ^ IONIC_TX_OFFLOAD_MASK) 624 625 uint16_t 626 ionic_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) 627 { 628 struct ionic_tx_qcq *txq = tx_queue; 629 struct rte_mbuf *txm; 630 uint64_t offloads; 631 int i = 0; 632 633 for (i = 0; i < nb_pkts; i++) { 634 txm = tx_pkts[i]; 635 636 if (txm->nb_segs > txq->num_segs_fw) { 637 rte_errno = -EINVAL; 638 break; 639 } 640 641 offloads = txm->ol_flags; 642 643 if (offloads & IONIC_TX_OFFLOAD_NOTSUP_MASK) { 644 rte_errno = -ENOTSUP; 645 break; 646 } 647 } 648 649 return i; 650 } 651 652 /********************************************************************* 653 * 654 * RX functions 655 * 656 **********************************************************************/ 657 658 static void ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index, 659 struct rte_mbuf *mbuf); 660 661 void 662 ionic_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id, 663 struct rte_eth_rxq_info *qinfo) 664 { 665 struct ionic_rx_qcq *rxq = dev->data->rx_queues[queue_id]; 666 struct ionic_queue *q = &rxq->qcq.q; 667 668 qinfo->mp = rxq->mb_pool; 669 qinfo->scattered_rx = dev->data->scattered_rx; 670 qinfo->nb_desc = q->num_descs; 671 qinfo->conf.rx_deferred_start = rxq->flags & IONIC_QCQ_F_DEFERRED; 672 qinfo->conf.offloads = dev->data->dev_conf.rxmode.offloads; 673 } 674 675 void __rte_cold 676 ionic_dev_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 677 { 678 struct ionic_rx_qcq *rxq = dev->data->rx_queues[qid]; 679 680 if (!rxq) 681 return; 682 683 IONIC_PRINT_CALL(); 684 685 ionic_qcq_free(&rxq->qcq); 686 } 687 688 int __rte_cold 689 ionic_dev_rx_queue_setup(struct rte_eth_dev *eth_dev, 690 uint16_t rx_queue_id, 691 uint16_t nb_desc, 692 uint32_t socket_id, 693 const struct rte_eth_rxconf *rx_conf, 694 struct rte_mempool *mp) 695 { 696 struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev); 697 struct ionic_rx_qcq *rxq; 698 uint64_t offloads; 699 int err; 700 701 if (rx_queue_id >= lif->nrxqcqs) { 702 IONIC_PRINT(ERR, 703 "Queue index %u not available (max %u queues)", 704 rx_queue_id, lif->nrxqcqs); 705 return -EINVAL; 706 } 707 708 offloads = rx_conf->offloads | eth_dev->data->dev_conf.rxmode.offloads; 709 IONIC_PRINT(DEBUG, 710 "Configuring skt %u RX queue %u with %u buffers, offloads %jx", 711 socket_id, rx_queue_id, nb_desc, offloads); 712 713 if (!rx_conf->rx_drop_en) 714 IONIC_PRINT(WARNING, "No-drop mode is not supported"); 715 716 /* Validate number of receive descriptors */ 717 if (!rte_is_power_of_2(nb_desc) || 718 nb_desc < IONIC_MIN_RING_DESC || 719 nb_desc > IONIC_MAX_RING_DESC) { 720 IONIC_PRINT(ERR, 721 "Bad descriptor count (%u) for queue %u (min: %u)", 722 nb_desc, rx_queue_id, IONIC_MIN_RING_DESC); 723 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */ 724 } 725 726 /* Free memory prior to re-allocation if needed... */ 727 if (eth_dev->data->rx_queues[rx_queue_id] != NULL) { 728 ionic_dev_rx_queue_release(eth_dev, rx_queue_id); 729 eth_dev->data->rx_queues[rx_queue_id] = NULL; 730 } 731 732 eth_dev->data->rx_queue_state[rx_queue_id] = 733 RTE_ETH_QUEUE_STATE_STOPPED; 734 735 err = ionic_rx_qcq_alloc(lif, socket_id, rx_queue_id, nb_desc, mp, 736 &rxq); 737 if (err) { 738 IONIC_PRINT(ERR, "Queue %d allocation failure", rx_queue_id); 739 return -EINVAL; 740 } 741 742 rxq->mb_pool = mp; 743 744 /* 745 * Note: the interface does not currently support 746 * RTE_ETH_RX_OFFLOAD_KEEP_CRC, please also consider ETHER_CRC_LEN 747 * when the adapter will be able to keep the CRC and subtract 748 * it to the length for all received packets: 749 * if (eth_dev->data->dev_conf.rxmode.offloads & 750 * RTE_ETH_RX_OFFLOAD_KEEP_CRC) 751 * rxq->crc_len = ETHER_CRC_LEN; 752 */ 753 754 /* Do not start queue with rte_eth_dev_start() */ 755 if (rx_conf->rx_deferred_start) 756 rxq->flags |= IONIC_QCQ_F_DEFERRED; 757 758 eth_dev->data->rx_queues[rx_queue_id] = rxq; 759 760 return 0; 761 } 762 763 static __rte_always_inline void 764 ionic_rx_clean(struct ionic_rx_qcq *rxq, 765 uint32_t q_desc_index, uint32_t cq_desc_index, 766 struct ionic_rx_service *rx_svc) 767 { 768 struct ionic_queue *q = &rxq->qcq.q; 769 struct ionic_cq *cq = &rxq->qcq.cq; 770 struct ionic_rxq_comp *cq_desc_base = cq->base; 771 struct ionic_rxq_comp *cq_desc = &cq_desc_base[cq_desc_index]; 772 struct rte_mbuf *rxm, *rxm_seg; 773 uint64_t pkt_flags = 0; 774 uint32_t pkt_type; 775 struct ionic_rx_stats *stats = &rxq->stats; 776 uint32_t left; 777 void **info; 778 779 assert(q_desc_index == cq_desc->comp_index); 780 781 info = IONIC_INFO_PTR(q, cq_desc->comp_index); 782 783 rxm = info[0]; 784 785 if (cq_desc->status) { 786 stats->bad_cq_status++; 787 ionic_rx_recycle(q, q_desc_index, rxm); 788 return; 789 } 790 791 if (rx_svc->nb_rx >= rx_svc->nb_pkts) { 792 stats->no_room++; 793 ionic_rx_recycle(q, q_desc_index, rxm); 794 return; 795 } 796 797 if (cq_desc->len > rxq->frame_size || cq_desc->len == 0) { 798 stats->bad_len++; 799 ionic_rx_recycle(q, q_desc_index, rxm); 800 return; 801 } 802 803 rxm->data_off = RTE_PKTMBUF_HEADROOM; 804 rte_prefetch1((char *)rxm->buf_addr + rxm->data_off); 805 rxm->nb_segs = 1; /* cq_desc->num_sg_elems */ 806 rxm->pkt_len = cq_desc->len; 807 rxm->port = rxq->qcq.lif->port_id; 808 809 rxm->data_len = RTE_MIN(rxq->hdr_seg_size, cq_desc->len); 810 left = cq_desc->len - rxm->data_len; 811 812 rxm_seg = rxm->next; 813 while (rxm_seg && left) { 814 rxm_seg->data_len = RTE_MIN(rxq->seg_size, left); 815 left -= rxm_seg->data_len; 816 817 rxm_seg = rxm_seg->next; 818 rxm->nb_segs++; 819 } 820 821 /* RSS */ 822 pkt_flags |= RTE_MBUF_F_RX_RSS_HASH; 823 rxm->hash.rss = rte_le_to_cpu_32(cq_desc->rss_hash); 824 825 /* Vlan Strip */ 826 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_VLAN) { 827 pkt_flags |= RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED; 828 rxm->vlan_tci = rte_le_to_cpu_16(cq_desc->vlan_tci); 829 } 830 831 /* Checksum */ 832 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_CALC) { 833 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_OK) 834 pkt_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD; 835 else if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_BAD) 836 pkt_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD; 837 838 if ((cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_TCP_OK) || 839 (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_UDP_OK)) 840 pkt_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD; 841 else if ((cq_desc->csum_flags & 842 IONIC_RXQ_COMP_CSUM_F_TCP_BAD) || 843 (cq_desc->csum_flags & 844 IONIC_RXQ_COMP_CSUM_F_UDP_BAD)) 845 pkt_flags |= RTE_MBUF_F_RX_L4_CKSUM_BAD; 846 } 847 848 rxm->ol_flags = pkt_flags; 849 850 /* Packet Type */ 851 switch (cq_desc->pkt_type_color & IONIC_RXQ_COMP_PKT_TYPE_MASK) { 852 case IONIC_PKT_TYPE_IPV4: 853 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4; 854 break; 855 case IONIC_PKT_TYPE_IPV6: 856 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6; 857 break; 858 case IONIC_PKT_TYPE_IPV4_TCP: 859 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 | 860 RTE_PTYPE_L4_TCP; 861 break; 862 case IONIC_PKT_TYPE_IPV6_TCP: 863 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 | 864 RTE_PTYPE_L4_TCP; 865 break; 866 case IONIC_PKT_TYPE_IPV4_UDP: 867 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 | 868 RTE_PTYPE_L4_UDP; 869 break; 870 case IONIC_PKT_TYPE_IPV6_UDP: 871 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 | 872 RTE_PTYPE_L4_UDP; 873 break; 874 default: 875 { 876 struct rte_ether_hdr *eth_h = rte_pktmbuf_mtod(rxm, 877 struct rte_ether_hdr *); 878 uint16_t ether_type = eth_h->ether_type; 879 if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_ARP)) 880 pkt_type = RTE_PTYPE_L2_ETHER_ARP; 881 else 882 pkt_type = RTE_PTYPE_UNKNOWN; 883 stats->mtods++; 884 break; 885 } 886 } 887 888 rxm->packet_type = pkt_type; 889 890 rx_svc->rx_pkts[rx_svc->nb_rx] = rxm; 891 rx_svc->nb_rx++; 892 893 stats->packets++; 894 stats->bytes += rxm->pkt_len; 895 } 896 897 static void 898 ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index, 899 struct rte_mbuf *mbuf) 900 { 901 struct ionic_rxq_desc *desc_base = q->base; 902 struct ionic_rxq_desc *old = &desc_base[q_desc_index]; 903 struct ionic_rxq_desc *new = &desc_base[q->head_idx]; 904 905 new->addr = old->addr; 906 new->len = old->len; 907 908 q->info[q->head_idx] = mbuf; 909 910 q->head_idx = Q_NEXT_TO_POST(q, 1); 911 912 ionic_q_flush(q); 913 } 914 915 static __rte_always_inline int 916 ionic_rx_fill(struct ionic_rx_qcq *rxq) 917 { 918 struct ionic_queue *q = &rxq->qcq.q; 919 struct ionic_rxq_desc *desc, *desc_base = q->base; 920 struct ionic_rxq_sg_desc *sg_desc, *sg_desc_base = q->sg_base; 921 struct ionic_rxq_sg_elem *elem; 922 void **info; 923 rte_iova_t dma_addr; 924 uint32_t i, j; 925 926 /* Initialize software ring entries */ 927 for (i = ionic_q_space_avail(q); i; i--) { 928 struct rte_mbuf *rxm = rte_mbuf_raw_alloc(rxq->mb_pool); 929 struct rte_mbuf *prev_rxm_seg; 930 931 if (rxm == NULL) { 932 IONIC_PRINT(ERR, "RX mbuf alloc failed"); 933 return -ENOMEM; 934 } 935 936 info = IONIC_INFO_PTR(q, q->head_idx); 937 938 desc = &desc_base[q->head_idx]; 939 dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(rxm)); 940 desc->addr = dma_addr; 941 desc->len = rxq->hdr_seg_size; 942 desc->opcode = (q->num_segs > 1) ? IONIC_RXQ_DESC_OPCODE_SG : 943 IONIC_RXQ_DESC_OPCODE_SIMPLE; 944 rxm->next = NULL; 945 946 prev_rxm_seg = rxm; 947 sg_desc = &sg_desc_base[q->head_idx]; 948 elem = sg_desc->elems; 949 for (j = 0; j < q->num_segs - 1u; j++) { 950 struct rte_mbuf *rxm_seg; 951 rte_iova_t data_iova; 952 953 rxm_seg = rte_mbuf_raw_alloc(rxq->mb_pool); 954 if (rxm_seg == NULL) { 955 IONIC_PRINT(ERR, "RX mbuf alloc failed"); 956 return -ENOMEM; 957 } 958 959 rxm_seg->data_off = 0; 960 data_iova = rte_mbuf_data_iova(rxm_seg); 961 dma_addr = rte_cpu_to_le_64(data_iova); 962 elem->addr = dma_addr; 963 elem->len = rxq->seg_size; 964 elem++; 965 966 rxm_seg->next = NULL; 967 prev_rxm_seg->next = rxm_seg; 968 prev_rxm_seg = rxm_seg; 969 } 970 971 info[0] = rxm; 972 973 q->head_idx = Q_NEXT_TO_POST(q, 1); 974 } 975 976 ionic_q_flush(q); 977 978 return 0; 979 } 980 981 /* 982 * Start Receive Units for specified queue. 983 */ 984 int __rte_cold 985 ionic_dev_rx_queue_start(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id) 986 { 987 uint8_t *rx_queue_state = eth_dev->data->rx_queue_state; 988 struct ionic_rx_qcq *rxq; 989 struct ionic_queue *q; 990 int err; 991 992 if (rx_queue_state[rx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) { 993 IONIC_PRINT(DEBUG, "RX queue %u already started", 994 rx_queue_id); 995 return 0; 996 } 997 998 rxq = eth_dev->data->rx_queues[rx_queue_id]; 999 q = &rxq->qcq.q; 1000 1001 rxq->frame_size = rxq->qcq.lif->frame_size - RTE_ETHER_CRC_LEN; 1002 1003 /* Recalculate segment count based on MTU */ 1004 q->num_segs = 1 + 1005 (rxq->frame_size + RTE_PKTMBUF_HEADROOM - 1) / rxq->seg_size; 1006 1007 IONIC_PRINT(DEBUG, "Starting RX queue %u, %u descs, size %u segs %u", 1008 rx_queue_id, q->num_descs, rxq->frame_size, q->num_segs); 1009 1010 err = ionic_lif_rxq_init(rxq); 1011 if (err) 1012 return err; 1013 1014 /* Allocate buffers for descriptor rings */ 1015 if (ionic_rx_fill(rxq) != 0) { 1016 IONIC_PRINT(ERR, "Could not alloc mbuf for queue:%d", 1017 rx_queue_id); 1018 return -1; 1019 } 1020 1021 rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED; 1022 1023 return 0; 1024 } 1025 1026 static __rte_always_inline void 1027 ionic_rxq_service(struct ionic_rx_qcq *rxq, uint32_t work_to_do, 1028 struct ionic_rx_service *rx_svc) 1029 { 1030 struct ionic_cq *cq = &rxq->qcq.cq; 1031 struct ionic_queue *q = &rxq->qcq.q; 1032 struct ionic_rxq_comp *cq_desc, *cq_desc_base = cq->base; 1033 bool more; 1034 uint32_t curr_q_tail_idx, curr_cq_tail_idx; 1035 uint32_t work_done = 0; 1036 1037 if (work_to_do == 0) 1038 return; 1039 1040 cq_desc = &cq_desc_base[cq->tail_idx]; 1041 while (color_match(cq_desc->pkt_type_color, cq->done_color)) { 1042 curr_cq_tail_idx = cq->tail_idx; 1043 cq->tail_idx = Q_NEXT_TO_SRVC(cq, 1); 1044 1045 if (cq->tail_idx == 0) 1046 cq->done_color = !cq->done_color; 1047 1048 /* Prefetch the next 4 descriptors */ 1049 if ((cq->tail_idx & 0x3) == 0) 1050 rte_prefetch0(&cq_desc_base[cq->tail_idx]); 1051 1052 do { 1053 more = (q->tail_idx != cq_desc->comp_index); 1054 1055 curr_q_tail_idx = q->tail_idx; 1056 q->tail_idx = Q_NEXT_TO_SRVC(q, 1); 1057 1058 /* Prefetch the next 4 descriptors */ 1059 if ((q->tail_idx & 0x3) == 0) 1060 /* q desc info */ 1061 rte_prefetch0(&q->info[q->tail_idx]); 1062 1063 ionic_rx_clean(rxq, curr_q_tail_idx, curr_cq_tail_idx, 1064 rx_svc); 1065 1066 } while (more); 1067 1068 if (++work_done == work_to_do) 1069 break; 1070 1071 cq_desc = &cq_desc_base[cq->tail_idx]; 1072 } 1073 } 1074 1075 /* 1076 * Stop Receive Units for specified queue. 1077 */ 1078 int __rte_cold 1079 ionic_dev_rx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id) 1080 { 1081 uint8_t *rx_queue_state = eth_dev->data->rx_queue_state; 1082 struct ionic_rx_stats *stats; 1083 struct ionic_rx_qcq *rxq; 1084 1085 IONIC_PRINT(DEBUG, "Stopping RX queue %u", rx_queue_id); 1086 1087 rxq = eth_dev->data->rx_queues[rx_queue_id]; 1088 1089 rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED; 1090 1091 ionic_lif_rxq_deinit(rxq); 1092 1093 /* Free all buffers from descriptor ring */ 1094 ionic_rx_empty(rxq); 1095 1096 stats = &rxq->stats; 1097 IONIC_PRINT(DEBUG, "RX queue %u pkts %ju mtod %ju", 1098 rxq->qcq.q.index, stats->packets, stats->mtods); 1099 1100 return 0; 1101 } 1102 1103 uint16_t 1104 ionic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, 1105 uint16_t nb_pkts) 1106 { 1107 struct ionic_rx_qcq *rxq = rx_queue; 1108 struct ionic_rx_service rx_svc; 1109 1110 rx_svc.rx_pkts = rx_pkts; 1111 rx_svc.nb_pkts = nb_pkts; 1112 rx_svc.nb_rx = 0; 1113 1114 ionic_rxq_service(rxq, nb_pkts, &rx_svc); 1115 1116 ionic_rx_fill(rxq); 1117 1118 return rx_svc.nb_rx; 1119 } 1120