drivers/net/ionic/ionic_rxtx.c

   1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
   2  * Copyright(c) 2018-2019 Pensando Systems, Inc. All rights reserved.
   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 #define IONIC_RX_RING_DOORBELL_STRIDE           (32 - 1)
  51
  52 /*********************************************************************
  53  *
  54  *  TX functions
  55  *
  56  **********************************************************************/
  57
  58 void
  59 ionic_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
  60                 struct rte_eth_txq_info *qinfo)
  61 {
  62         struct ionic_qcq *txq = dev->data->tx_queues[queue_id];
  63         struct ionic_queue *q = &txq->q;
  64
  65         qinfo->nb_desc = q->num_descs;
  66         qinfo->conf.offloads = txq->offloads;
  67         qinfo->conf.tx_deferred_start = txq->flags & IONIC_QCQ_F_DEFERRED;
  68 }
  69
  70 static inline void __rte_cold
  71 ionic_tx_flush(struct ionic_cq *cq)
  72 {
  73         struct ionic_queue *q = cq->bound_q;
  74         struct ionic_desc_info *q_desc_info;
  75         struct rte_mbuf *txm, *next;
  76         struct ionic_txq_comp *cq_desc_base = cq->base;
  77         struct ionic_txq_comp *cq_desc;
  78         u_int32_t comp_index = (u_int32_t)-1;
  79
  80         cq_desc = &cq_desc_base[cq->tail_idx];
  81         while (color_match(cq_desc->color, cq->done_color)) {
  82                 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
  83
  84                 /* Prefetch the next 4 descriptors (not really useful here) */
  85                 if ((cq->tail_idx & 0x3) == 0)
  86                         rte_prefetch0(&cq_desc_base[cq->tail_idx]);
  87
  88                 if (cq->tail_idx == 0)
  89                         cq->done_color = !cq->done_color;
  90
  91                 comp_index = cq_desc->comp_index;
  92
  93                 cq_desc = &cq_desc_base[cq->tail_idx];
  94         }
  95
  96         if (comp_index != (u_int32_t)-1) {
  97                 while (q->tail_idx != comp_index) {
  98                         q_desc_info = &q->info[q->tail_idx];
  99
 100                         q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 101
 102                         /* Prefetch the next 4 descriptors */
 103                         if ((q->tail_idx & 0x3) == 0)
 104                                 /* q desc info */
 105                                 rte_prefetch0(&q->info[q->tail_idx]);
 106
 107                         /*
 108                          * Note: you can just use rte_pktmbuf_free,
 109                          * but this loop is faster
 110                          */
 111                         txm = q_desc_info->cb_arg;
 112                         while (txm != NULL) {
 113                                 next = txm->next;
 114                                 rte_pktmbuf_free_seg(txm);
 115                                 txm = next;
 116                         }
 117                 }
 118         }
 119 }
 120
 121 void __rte_cold
 122 ionic_dev_tx_queue_release(void *tx_queue)
 123 {
 124         struct ionic_qcq *txq = (struct ionic_qcq *)tx_queue;
 125
 126         IONIC_PRINT_CALL();
 127
 128         ionic_lif_txq_deinit(txq);
 129
 130         ionic_qcq_free(txq);
 131 }
 132
 133 int __rte_cold
 134 ionic_dev_tx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id)
 135 {
 136         struct ionic_qcq *txq;
 137
 138         IONIC_PRINT(DEBUG, "Stopping TX queue %u", tx_queue_id);
 139
 140         txq = eth_dev->data->tx_queues[tx_queue_id];
 141
 142         eth_dev->data->tx_queue_state[tx_queue_id] =
 143                 RTE_ETH_QUEUE_STATE_STOPPED;
 144
 145         /*
 146          * Note: we should better post NOP Tx desc and wait for its completion
 147          * before disabling Tx queue
 148          */
 149
 150         ionic_qcq_disable(txq);
 151
 152         ionic_tx_flush(&txq->cq);
 153
 154         return 0;
 155 }
 156
 157 int __rte_cold
 158 ionic_dev_tx_queue_setup(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id,
 159                 uint16_t nb_desc, uint32_t socket_id,
 160                 const struct rte_eth_txconf *tx_conf)
 161 {
 162         struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
 163         struct ionic_qcq *txq;
 164         uint64_t offloads;
 165         int err;
 166
 167         if (tx_queue_id >= lif->ntxqcqs) {
 168                 IONIC_PRINT(DEBUG, "Queue index %u not available "
 169                         "(max %u queues)",
 170                         tx_queue_id, lif->ntxqcqs);
 171                 return -EINVAL;
 172         }
 173
 174         offloads = tx_conf->offloads | eth_dev->data->dev_conf.txmode.offloads;
 175         IONIC_PRINT(DEBUG,
 176                 "Configuring skt %u TX queue %u with %u buffers, offloads %jx",
 177                 socket_id, tx_queue_id, nb_desc, offloads);
 178
 179         /* Validate number of receive descriptors */
 180         if (!rte_is_power_of_2(nb_desc) || nb_desc < IONIC_MIN_RING_DESC)
 181                 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */
 182
 183         /* Free memory prior to re-allocation if needed... */
 184         if (eth_dev->data->tx_queues[tx_queue_id] != NULL) {
 185                 void *tx_queue = eth_dev->data->tx_queues[tx_queue_id];
 186                 ionic_dev_tx_queue_release(tx_queue);
 187                 eth_dev->data->tx_queues[tx_queue_id] = NULL;
 188         }
 189
 190         eth_dev->data->tx_queue_state[tx_queue_id] =
 191                 RTE_ETH_QUEUE_STATE_STOPPED;
 192
 193         err = ionic_tx_qcq_alloc(lif, tx_queue_id, nb_desc, &txq);
 194         if (err) {
 195                 IONIC_PRINT(DEBUG, "Queue allocation failure");
 196                 return -EINVAL;
 197         }
 198
 199         /* Do not start queue with rte_eth_dev_start() */
 200         if (tx_conf->tx_deferred_start)
 201                 txq->flags |= IONIC_QCQ_F_DEFERRED;
 202
 203         txq->offloads = offloads;
 204
 205         eth_dev->data->tx_queues[tx_queue_id] = txq;
 206
 207         return 0;
 208 }
 209
 210 /*
 211  * Start Transmit Units for specified queue.
 212  */
 213 int __rte_cold
 214 ionic_dev_tx_queue_start(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id)
 215 {
 216         uint8_t *tx_queue_state = eth_dev->data->tx_queue_state;
 217         struct ionic_qcq *txq;
 218         int err;
 219
 220         if (tx_queue_state[tx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) {
 221                 IONIC_PRINT(DEBUG, "TX queue %u already started",
 222                         tx_queue_id);
 223                 return 0;
 224         }
 225
 226         txq = eth_dev->data->tx_queues[tx_queue_id];
 227
 228         IONIC_PRINT(DEBUG, "Starting TX queue %u, %u descs",
 229                 tx_queue_id, txq->q.num_descs);
 230
 231         if (!(txq->flags & IONIC_QCQ_F_INITED)) {
 232                 err = ionic_lif_txq_init(txq);
 233                 if (err)
 234                         return err;
 235         } else {
 236                 ionic_qcq_enable(txq);
 237         }
 238
 239         tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 240
 241         return 0;
 242 }
 243
 244 static void
 245 ionic_tx_tcp_pseudo_csum(struct rte_mbuf *txm)
 246 {
 247         struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *);
 248         char *l3_hdr = ((char *)eth_hdr) + txm->l2_len;
 249         struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *)
 250                 (l3_hdr + txm->l3_len);
 251
 252         if (txm->ol_flags & PKT_TX_IP_CKSUM) {
 253                 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr;
 254                 ipv4_hdr->hdr_checksum = 0;
 255                 tcp_hdr->cksum = 0;
 256                 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr);
 257         } else {
 258                 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr;
 259                 tcp_hdr->cksum = 0;
 260                 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr);
 261         }
 262 }
 263
 264 static void
 265 ionic_tx_tcp_inner_pseudo_csum(struct rte_mbuf *txm)
 266 {
 267         struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *);
 268         char *l3_hdr = ((char *)eth_hdr) + txm->outer_l2_len +
 269                 txm->outer_l3_len + txm->l2_len;
 270         struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *)
 271                 (l3_hdr + txm->l3_len);
 272
 273         if (txm->ol_flags & PKT_TX_IPV4) {
 274                 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr;
 275                 ipv4_hdr->hdr_checksum = 0;
 276                 tcp_hdr->cksum = 0;
 277                 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr);
 278         } else {
 279                 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr;
 280                 tcp_hdr->cksum = 0;
 281                 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr);
 282         }
 283 }
 284
 285 static void
 286 ionic_tx_tso_post(struct ionic_queue *q, struct ionic_txq_desc *desc,
 287                 struct rte_mbuf *txm,
 288                 rte_iova_t addr, uint8_t nsge, uint16_t len,
 289                 uint32_t hdrlen, uint32_t mss,
 290                 bool encap,
 291                 uint16_t vlan_tci, bool has_vlan,
 292                 bool start, bool done)
 293 {
 294         uint8_t flags = 0;
 295         flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0;
 296         flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0;
 297         flags |= start ? IONIC_TXQ_DESC_FLAG_TSO_SOT : 0;
 298         flags |= done ? IONIC_TXQ_DESC_FLAG_TSO_EOT : 0;
 299
 300         desc->cmd = encode_txq_desc_cmd(IONIC_TXQ_DESC_OPCODE_TSO,
 301                 flags, nsge, addr);
 302         desc->len = len;
 303         desc->vlan_tci = vlan_tci;
 304         desc->hdr_len = hdrlen;
 305         desc->mss = mss;
 306
 307         ionic_q_post(q, done, NULL, done ? txm : NULL);
 308 }
 309
 310 static struct ionic_txq_desc *
 311 ionic_tx_tso_next(struct ionic_queue *q, struct ionic_txq_sg_elem **elem)
 312 {
 313         struct ionic_txq_desc *desc_base = q->base;
 314         struct ionic_txq_sg_desc *sg_desc_base = q->sg_base;
 315         struct ionic_txq_desc *desc = &desc_base[q->head_idx];
 316         struct ionic_txq_sg_desc *sg_desc = &sg_desc_base[q->head_idx];
 317
 318         *elem = sg_desc->elems;
 319         return desc;
 320 }
 321
 322 static int
 323 ionic_tx_tso(struct ionic_queue *q, struct rte_mbuf *txm,
 324                 uint64_t offloads __rte_unused, bool not_xmit_more)
 325 {
 326         struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
 327         struct ionic_txq_desc *desc;
 328         struct ionic_txq_sg_elem *elem;
 329         struct rte_mbuf *txm_seg;
 330         uint64_t desc_addr = 0;
 331         uint16_t desc_len = 0;
 332         uint8_t desc_nsge;
 333         uint32_t hdrlen;
 334         uint32_t mss = txm->tso_segsz;
 335         uint32_t frag_left = 0;
 336         uint32_t left;
 337         uint32_t seglen;
 338         uint32_t len;
 339         uint32_t offset = 0;
 340         bool start, done;
 341         bool encap;
 342         bool has_vlan = !!(txm->ol_flags & PKT_TX_VLAN_PKT);
 343         uint16_t vlan_tci = txm->vlan_tci;
 344         uint64_t ol_flags = txm->ol_flags;
 345
 346         encap = ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
 347                 (ol_flags & PKT_TX_OUTER_UDP_CKSUM)) &&
 348                 ((ol_flags & PKT_TX_OUTER_IPV4) ||
 349                 (ol_flags & PKT_TX_OUTER_IPV6));
 350
 351         /* Preload inner-most TCP csum field with IP pseudo hdr
 352          * calculated with IP length set to zero.  HW will later
 353          * add in length to each TCP segment resulting from the TSO.
 354          */
 355
 356         if (encap) {
 357                 ionic_tx_tcp_inner_pseudo_csum(txm);
 358                 hdrlen = txm->outer_l2_len + txm->outer_l3_len +
 359                         txm->l2_len + txm->l3_len + txm->l4_len;
 360         } else {
 361                 ionic_tx_tcp_pseudo_csum(txm);
 362                 hdrlen = txm->l2_len + txm->l3_len + txm->l4_len;
 363         }
 364
 365         seglen = hdrlen + mss;
 366         left = txm->data_len;
 367
 368         desc = ionic_tx_tso_next(q, &elem);
 369         start = true;
 370
 371         /* Chop data up into desc segments */
 372
 373         while (left > 0) {
 374                 len = RTE_MIN(seglen, left);
 375                 frag_left = seglen - len;
 376                 desc_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(txm));
 377                 desc_len = len;
 378                 desc_nsge = 0;
 379                 left -= len;
 380                 offset += len;
 381                 if (txm->nb_segs > 1 && frag_left > 0)
 382                         continue;
 383                 done = (txm->nb_segs == 1 && left == 0);
 384                 ionic_tx_tso_post(q, desc, txm,
 385                         desc_addr, desc_nsge, desc_len,
 386                         hdrlen, mss,
 387                         encap,
 388                         vlan_tci, has_vlan,
 389                         start, done && not_xmit_more);
 390                 desc = ionic_tx_tso_next(q, &elem);
 391                 start = false;
 392                 seglen = mss;
 393         }
 394
 395         /* Chop frags into desc segments */
 396
 397         txm_seg = txm->next;
 398         while (txm_seg != NULL) {
 399                 offset = 0;
 400                 left = txm_seg->data_len;
 401                 stats->frags++;
 402
 403                 while (left > 0) {
 404                         rte_iova_t data_iova;
 405                         data_iova = rte_mbuf_data_iova(txm_seg);
 406                         elem->addr = rte_cpu_to_le_64(data_iova) + offset;
 407                         if (frag_left > 0) {
 408                                 len = RTE_MIN(frag_left, left);
 409                                 frag_left -= len;
 410                                 elem->len = len;
 411                                 elem++;
 412                                 desc_nsge++;
 413                         } else {
 414                                 len = RTE_MIN(mss, left);
 415                                 frag_left = mss - len;
 416                                 data_iova = rte_mbuf_data_iova(txm_seg);
 417                                 desc_addr = rte_cpu_to_le_64(data_iova);
 418                                 desc_len = len;
 419                                 desc_nsge = 0;
 420                         }
 421                         left -= len;
 422                         offset += len;
 423                         if (txm_seg->next != NULL && frag_left > 0)
 424                                 continue;
 425                         done = (txm_seg->next == NULL && left == 0);
 426                         ionic_tx_tso_post(q, desc, txm_seg,
 427                                 desc_addr, desc_nsge, desc_len,
 428                                 hdrlen, mss,
 429                                 encap,
 430                                 vlan_tci, has_vlan,
 431                                 start, done && not_xmit_more);
 432                         desc = ionic_tx_tso_next(q, &elem);
 433                         start = false;
 434                 }
 435
 436                 txm_seg = txm_seg->next;
 437         }
 438
 439         stats->tso++;
 440
 441         return 0;
 442 }
 443
 444 static int
 445 ionic_tx(struct ionic_queue *q, struct rte_mbuf *txm,
 446                 uint64_t offloads, bool not_xmit_more)
 447 {
 448         struct ionic_txq_desc *desc_base = q->base;
 449         struct ionic_txq_sg_desc *sg_desc_base = q->sg_base;
 450         struct ionic_txq_desc *desc = &desc_base[q->head_idx];
 451         struct ionic_txq_sg_desc *sg_desc = &sg_desc_base[q->head_idx];
 452         struct ionic_txq_sg_elem *elem = sg_desc->elems;
 453         struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
 454         struct rte_mbuf *txm_seg;
 455         bool encap;
 456         bool has_vlan;
 457         uint64_t ol_flags = txm->ol_flags;
 458         uint64_t addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(txm));
 459         uint8_t opcode = IONIC_TXQ_DESC_OPCODE_CSUM_NONE;
 460         uint8_t flags = 0;
 461
 462         if ((ol_flags & PKT_TX_IP_CKSUM) &&
 463             (offloads & DEV_TX_OFFLOAD_IPV4_CKSUM)) {
 464                 opcode = IONIC_TXQ_DESC_OPCODE_CSUM_HW;
 465                 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L3;
 466         }
 467
 468         if (((ol_flags & PKT_TX_TCP_CKSUM) &&
 469              (offloads & DEV_TX_OFFLOAD_TCP_CKSUM)) ||
 470             ((ol_flags & PKT_TX_UDP_CKSUM) &&
 471              (offloads & DEV_TX_OFFLOAD_UDP_CKSUM))) {
 472                 opcode = IONIC_TXQ_DESC_OPCODE_CSUM_HW;
 473                 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L4;
 474         }
 475
 476         if (opcode == IONIC_TXQ_DESC_OPCODE_CSUM_NONE)
 477                 stats->no_csum++;
 478
 479         has_vlan = (ol_flags & PKT_TX_VLAN_PKT);
 480         encap = ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
 481                         (ol_flags & PKT_TX_OUTER_UDP_CKSUM)) &&
 482                         ((ol_flags & PKT_TX_OUTER_IPV4) ||
 483                         (ol_flags & PKT_TX_OUTER_IPV6));
 484
 485         flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0;
 486         flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0;
 487
 488         desc->cmd = encode_txq_desc_cmd(opcode, flags, txm->nb_segs - 1, addr);
 489         desc->len = txm->data_len;
 490         desc->vlan_tci = txm->vlan_tci;
 491
 492         txm_seg = txm->next;
 493         while (txm_seg != NULL) {
 494                 elem->len = txm_seg->data_len;
 495                 elem->addr = rte_cpu_to_le_64(rte_mbuf_data_iova(txm_seg));
 496                 stats->frags++;
 497                 elem++;
 498                 txm_seg = txm_seg->next;
 499         }
 500
 501         ionic_q_post(q, not_xmit_more, NULL, txm);
 502
 503         return 0;
 504 }
 505
 506 uint16_t
 507 ionic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 508                 uint16_t nb_pkts)
 509 {
 510         struct ionic_qcq *txq = (struct ionic_qcq *)tx_queue;
 511         struct ionic_queue *q = &txq->q;
 512         struct ionic_cq *cq = &txq->cq;
 513         struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
 514         uint32_t next_q_head_idx;
 515         uint32_t bytes_tx = 0;
 516         uint16_t nb_tx = 0;
 517         int err;
 518         bool last;
 519
 520         /* Cleaning old buffers */
 521         ionic_tx_flush(cq);
 522
 523         if (unlikely(ionic_q_space_avail(q) < nb_pkts)) {
 524                 stats->stop += nb_pkts;
 525                 return 0;
 526         }
 527
 528         while (nb_tx < nb_pkts) {
 529                 last = (nb_tx == (nb_pkts - 1));
 530
 531                 next_q_head_idx = (q->head_idx + 1) & (q->num_descs - 1);
 532                 if ((next_q_head_idx & 0x3) == 0) {
 533                         struct ionic_txq_desc *desc_base = q->base;
 534                         rte_prefetch0(&desc_base[next_q_head_idx]);
 535                         rte_prefetch0(&q->info[next_q_head_idx]);
 536                 }
 537
 538                 if (tx_pkts[nb_tx]->ol_flags & PKT_TX_TCP_SEG)
 539                         err = ionic_tx_tso(q, tx_pkts[nb_tx], txq->offloads,
 540                                 last);
 541                 else
 542                         err = ionic_tx(q, tx_pkts[nb_tx], txq->offloads, last);
 543                 if (err) {
 544                         stats->drop += nb_pkts - nb_tx;
 545                         if (nb_tx > 0)
 546                                 ionic_q_flush(q);
 547                         break;
 548                 }
 549
 550                 bytes_tx += tx_pkts[nb_tx]->pkt_len;
 551                 nb_tx++;
 552         }
 553
 554         stats->packets += nb_tx;
 555         stats->bytes += bytes_tx;
 556
 557         return nb_tx;
 558 }
 559
 560 /*********************************************************************
 561  *
 562  *  TX prep functions
 563  *
 564  **********************************************************************/
 565
 566 #define IONIC_TX_OFFLOAD_MASK ( \
 567         PKT_TX_IPV4 |           \
 568         PKT_TX_IPV6 |           \
 569         PKT_TX_VLAN |           \
 570         PKT_TX_IP_CKSUM |       \
 571         PKT_TX_TCP_SEG |        \
 572         PKT_TX_L4_MASK)
 573
 574 #define IONIC_TX_OFFLOAD_NOTSUP_MASK \
 575         (PKT_TX_OFFLOAD_MASK ^ IONIC_TX_OFFLOAD_MASK)
 576
 577 uint16_t
 578 ionic_prep_pkts(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts,
 579                 uint16_t nb_pkts)
 580 {
 581         struct rte_mbuf *txm;
 582         uint64_t offloads;
 583         int i = 0;
 584
 585         for (i = 0; i < nb_pkts; i++) {
 586                 txm = tx_pkts[i];
 587
 588                 if (txm->nb_segs > IONIC_TX_MAX_SG_ELEMS) {
 589                         rte_errno = -EINVAL;
 590                         break;
 591                 }
 592
 593                 offloads = txm->ol_flags;
 594
 595                 if (offloads & IONIC_TX_OFFLOAD_NOTSUP_MASK) {
 596                         rte_errno = -ENOTSUP;
 597                         break;
 598                 }
 599         }
 600
 601         return i;
 602 }
 603
 604 /*********************************************************************
 605  *
 606  *  RX functions
 607  *
 608  **********************************************************************/
 609
 610 static void ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index,
 611                 struct rte_mbuf *mbuf);
 612
 613 void
 614 ionic_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
 615                 struct rte_eth_rxq_info *qinfo)
 616 {
 617         struct ionic_qcq *rxq = dev->data->rx_queues[queue_id];
 618         struct ionic_queue *q = &rxq->q;
 619
 620         qinfo->mp = rxq->mb_pool;
 621         qinfo->scattered_rx = dev->data->scattered_rx;
 622         qinfo->nb_desc = q->num_descs;
 623         qinfo->conf.rx_deferred_start = rxq->flags & IONIC_QCQ_F_DEFERRED;
 624         qinfo->conf.offloads = rxq->offloads;
 625 }
 626
 627 static void __rte_cold
 628 ionic_rx_empty(struct ionic_queue *q)
 629 {
 630         struct ionic_qcq *rxq = IONIC_Q_TO_QCQ(q);
 631         struct ionic_desc_info *cur;
 632         struct rte_mbuf *mbuf;
 633
 634         while (q->tail_idx != q->head_idx) {
 635                 cur = &q->info[q->tail_idx];
 636                 mbuf = cur->cb_arg;
 637                 rte_mempool_put(rxq->mb_pool, mbuf);
 638
 639                 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 640         }
 641 }
 642
 643 void __rte_cold
 644 ionic_dev_rx_queue_release(void *rx_queue)
 645 {
 646         struct ionic_qcq *rxq = (struct ionic_qcq *)rx_queue;
 647
 648         IONIC_PRINT_CALL();
 649
 650         ionic_rx_empty(&rxq->q);
 651
 652         ionic_lif_rxq_deinit(rxq);
 653
 654         ionic_qcq_free(rxq);
 655 }
 656
 657 int __rte_cold
 658 ionic_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
 659                 uint16_t rx_queue_id,
 660                 uint16_t nb_desc,
 661                 uint32_t socket_id,
 662                 const struct rte_eth_rxconf *rx_conf,
 663                 struct rte_mempool *mp)
 664 {
 665         struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
 666         struct ionic_qcq *rxq;
 667         uint64_t offloads;
 668         int err;
 669
 670         if (rx_queue_id >= lif->nrxqcqs) {
 671                 IONIC_PRINT(ERR,
 672                         "Queue index %u not available (max %u queues)",
 673                         rx_queue_id, lif->nrxqcqs);
 674                 return -EINVAL;
 675         }
 676
 677         offloads = rx_conf->offloads | eth_dev->data->dev_conf.rxmode.offloads;
 678         IONIC_PRINT(DEBUG,
 679                 "Configuring skt %u RX queue %u with %u buffers, offloads %jx",
 680                 socket_id, rx_queue_id, nb_desc, offloads);
 681
 682         if (!rx_conf->rx_drop_en)
 683                 IONIC_PRINT(WARNING, "No-drop mode is not supported");
 684
 685         /* Validate number of receive descriptors */
 686         if (!rte_is_power_of_2(nb_desc) ||
 687                         nb_desc < IONIC_MIN_RING_DESC ||
 688                         nb_desc > IONIC_MAX_RING_DESC) {
 689                 IONIC_PRINT(ERR,
 690                         "Bad descriptor count (%u) for queue %u (min: %u)",
 691                         nb_desc, rx_queue_id, IONIC_MIN_RING_DESC);
 692                 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */
 693         }
 694
 695         /* Free memory prior to re-allocation if needed... */
 696         if (eth_dev->data->rx_queues[rx_queue_id] != NULL) {
 697                 void *rx_queue = eth_dev->data->rx_queues[rx_queue_id];
 698                 ionic_dev_rx_queue_release(rx_queue);
 699                 eth_dev->data->rx_queues[rx_queue_id] = NULL;
 700         }
 701
 702         eth_dev->data->rx_queue_state[rx_queue_id] =
 703                 RTE_ETH_QUEUE_STATE_STOPPED;
 704
 705         err = ionic_rx_qcq_alloc(lif, rx_queue_id, nb_desc, &rxq);
 706         if (err) {
 707                 IONIC_PRINT(ERR, "Queue %d allocation failure", rx_queue_id);
 708                 return -EINVAL;
 709         }
 710
 711         rxq->mb_pool = mp;
 712
 713         /*
 714          * Note: the interface does not currently support
 715          * DEV_RX_OFFLOAD_KEEP_CRC, please also consider ETHER_CRC_LEN
 716          * when the adapter will be able to keep the CRC and subtract
 717          * it to the length for all received packets:
 718          * if (eth_dev->data->dev_conf.rxmode.offloads &
 719          *     DEV_RX_OFFLOAD_KEEP_CRC)
 720          *   rxq->crc_len = ETHER_CRC_LEN;
 721          */
 722
 723         /* Do not start queue with rte_eth_dev_start() */
 724         if (rx_conf->rx_deferred_start)
 725                 rxq->flags |= IONIC_QCQ_F_DEFERRED;
 726
 727         rxq->offloads = offloads;
 728
 729         eth_dev->data->rx_queues[rx_queue_id] = rxq;
 730
 731         return 0;
 732 }
 733
 734 static void
 735 ionic_rx_clean(struct ionic_queue *q,
 736                 uint32_t q_desc_index, uint32_t cq_desc_index,
 737                 void *cb_arg, void *service_cb_arg)
 738 {
 739         struct ionic_rxq_comp *cq_desc_base = q->bound_cq->base;
 740         struct ionic_rxq_comp *cq_desc = &cq_desc_base[cq_desc_index];
 741         struct rte_mbuf *rxm = cb_arg;
 742         struct rte_mbuf *rxm_seg;
 743         struct ionic_qcq *rxq = IONIC_Q_TO_QCQ(q);
 744         uint32_t max_frame_size =
 745                 rxq->lif->eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
 746         uint64_t pkt_flags = 0;
 747         uint32_t pkt_type;
 748         struct ionic_rx_stats *stats = IONIC_Q_TO_RX_STATS(q);
 749         struct ionic_rx_service *recv_args = (struct ionic_rx_service *)
 750                 service_cb_arg;
 751         uint32_t buf_size = (uint16_t)
 752                 (rte_pktmbuf_data_room_size(rxq->mb_pool) -
 753                 RTE_PKTMBUF_HEADROOM);
 754         uint32_t left;
 755
 756         if (!recv_args) {
 757                 stats->no_cb_arg++;
 758                 /* Flush */
 759                 rte_pktmbuf_free(rxm);
 760                 /*
 761                  * Note: rte_mempool_put is faster with no segs
 762                  * rte_mempool_put(rxq->mb_pool, rxm);
 763                  */
 764                 return;
 765         }
 766
 767         if (cq_desc->status) {
 768                 stats->bad_cq_status++;
 769                 ionic_rx_recycle(q, q_desc_index, rxm);
 770                 return;
 771         }
 772
 773         if (recv_args->nb_rx >= recv_args->nb_pkts) {
 774                 stats->no_room++;
 775                 ionic_rx_recycle(q, q_desc_index, rxm);
 776                 return;
 777         }
 778
 779         if (cq_desc->len > max_frame_size ||
 780                         cq_desc->len == 0) {
 781                 stats->bad_len++;
 782                 ionic_rx_recycle(q, q_desc_index, rxm);
 783                 return;
 784         }
 785
 786         rxm->data_off = RTE_PKTMBUF_HEADROOM;
 787         rte_prefetch1((char *)rxm->buf_addr + rxm->data_off);
 788         rxm->nb_segs = 1; /* cq_desc->num_sg_elems */
 789         rxm->pkt_len = cq_desc->len;
 790         rxm->port = rxq->lif->port_id;
 791
 792         left = cq_desc->len;
 793
 794         rxm->data_len = RTE_MIN(buf_size, left);
 795         left -= rxm->data_len;
 796
 797         rxm_seg = rxm->next;
 798         while (rxm_seg && left) {
 799                 rxm_seg->data_len = RTE_MIN(buf_size, left);
 800                 left -= rxm_seg->data_len;
 801
 802                 rxm_seg = rxm_seg->next;
 803                 rxm->nb_segs++;
 804         }
 805
 806         /* RSS */
 807         pkt_flags |= PKT_RX_RSS_HASH;
 808         rxm->hash.rss = cq_desc->rss_hash;
 809
 810         /* Vlan Strip */
 811         if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_VLAN) {
 812                 pkt_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
 813                 rxm->vlan_tci = cq_desc->vlan_tci;
 814         }
 815
 816         /* Checksum */
 817         if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_CALC) {
 818                 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_OK)
 819                         pkt_flags |= PKT_RX_IP_CKSUM_GOOD;
 820                 else if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_BAD)
 821                         pkt_flags |= PKT_RX_IP_CKSUM_BAD;
 822
 823                 if ((cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_TCP_OK) ||
 824                         (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_UDP_OK))
 825                         pkt_flags |= PKT_RX_L4_CKSUM_GOOD;
 826                 else if ((cq_desc->csum_flags &
 827                                 IONIC_RXQ_COMP_CSUM_F_TCP_BAD) ||
 828                                 (cq_desc->csum_flags &
 829                                 IONIC_RXQ_COMP_CSUM_F_UDP_BAD))
 830                         pkt_flags |= PKT_RX_L4_CKSUM_BAD;
 831         }
 832
 833         rxm->ol_flags = pkt_flags;
 834
 835         /* Packet Type */
 836         switch (cq_desc->pkt_type_color & IONIC_RXQ_COMP_PKT_TYPE_MASK) {
 837         case IONIC_PKT_TYPE_IPV4:
 838                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4;
 839                 break;
 840         case IONIC_PKT_TYPE_IPV6:
 841                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6;
 842                 break;
 843         case IONIC_PKT_TYPE_IPV4_TCP:
 844                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 |
 845                         RTE_PTYPE_L4_TCP;
 846                 break;
 847         case IONIC_PKT_TYPE_IPV6_TCP:
 848                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 |
 849                         RTE_PTYPE_L4_TCP;
 850                 break;
 851         case IONIC_PKT_TYPE_IPV4_UDP:
 852                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 |
 853                         RTE_PTYPE_L4_UDP;
 854                 break;
 855         case IONIC_PKT_TYPE_IPV6_UDP:
 856                 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 |
 857                         RTE_PTYPE_L4_UDP;
 858                 break;
 859         default:
 860                 {
 861                         struct rte_ether_hdr *eth_h = rte_pktmbuf_mtod(rxm,
 862                                 struct rte_ether_hdr *);
 863                         uint16_t ether_type = eth_h->ether_type;
 864                         if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_ARP))
 865                                 pkt_type = RTE_PTYPE_L2_ETHER_ARP;
 866                         else
 867                                 pkt_type = RTE_PTYPE_UNKNOWN;
 868                         break;
 869                 }
 870         }
 871
 872         rxm->packet_type = pkt_type;
 873
 874         recv_args->rx_pkts[recv_args->nb_rx] = rxm;
 875         recv_args->nb_rx++;
 876
 877         stats->packets++;
 878         stats->bytes += rxm->pkt_len;
 879 }
 880
 881 static void
 882 ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index,
 883                  struct rte_mbuf *mbuf)
 884 {
 885         struct ionic_rxq_desc *desc_base = q->base;
 886         struct ionic_rxq_desc *old = &desc_base[q_desc_index];
 887         struct ionic_rxq_desc *new = &desc_base[q->head_idx];
 888
 889         new->addr = old->addr;
 890         new->len = old->len;
 891
 892         ionic_q_post(q, true, ionic_rx_clean, mbuf);
 893 }
 894
 895 static int __rte_cold
 896 ionic_rx_fill(struct ionic_qcq *rxq, uint32_t len)
 897 {
 898         struct ionic_queue *q = &rxq->q;
 899         struct ionic_rxq_desc *desc_base = q->base;
 900         struct ionic_rxq_sg_desc *sg_desc_base = q->sg_base;
 901         struct ionic_rxq_desc *desc;
 902         struct ionic_rxq_sg_desc *sg_desc;
 903         struct ionic_rxq_sg_elem *elem;
 904         rte_iova_t dma_addr;
 905         uint32_t i, j, nsegs, buf_size, size;
 906         bool ring_doorbell;
 907
 908         buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
 909                 RTE_PKTMBUF_HEADROOM);
 910
 911         /* Initialize software ring entries */
 912         for (i = ionic_q_space_avail(q); i; i--) {
 913                 struct rte_mbuf *rxm = rte_mbuf_raw_alloc(rxq->mb_pool);
 914                 struct rte_mbuf *prev_rxm_seg;
 915
 916                 if (rxm == NULL) {
 917                         IONIC_PRINT(ERR, "RX mbuf alloc failed");
 918                         return -ENOMEM;
 919                 }
 920
 921                 nsegs = (len + buf_size - 1) / buf_size;
 922
 923                 desc = &desc_base[q->head_idx];
 924                 dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(rxm));
 925                 desc->addr = dma_addr;
 926                 desc->len = buf_size;
 927                 size = buf_size;
 928                 desc->opcode = (nsegs > 1) ? IONIC_RXQ_DESC_OPCODE_SG :
 929                         IONIC_RXQ_DESC_OPCODE_SIMPLE;
 930                 rxm->next = NULL;
 931
 932                 prev_rxm_seg = rxm;
 933                 sg_desc = &sg_desc_base[q->head_idx];
 934                 elem = sg_desc->elems;
 935                 for (j = 0; j < nsegs - 1 && j < IONIC_RX_MAX_SG_ELEMS; j++) {
 936                         struct rte_mbuf *rxm_seg;
 937                         rte_iova_t data_iova;
 938
 939                         rxm_seg = rte_mbuf_raw_alloc(rxq->mb_pool);
 940                         if (rxm_seg == NULL) {
 941                                 IONIC_PRINT(ERR, "RX mbuf alloc failed");
 942                                 return -ENOMEM;
 943                         }
 944
 945                         data_iova = rte_mbuf_data_iova(rxm_seg);
 946                         dma_addr = rte_cpu_to_le_64(data_iova);
 947                         elem->addr = dma_addr;
 948                         elem->len = buf_size;
 949                         size += buf_size;
 950                         elem++;
 951                         rxm_seg->next = NULL;
 952                         prev_rxm_seg->next = rxm_seg;
 953                         prev_rxm_seg = rxm_seg;
 954                 }
 955
 956                 if (size < len)
 957                         IONIC_PRINT(ERR, "Rx SG size is not sufficient (%d < %d)",
 958                                 size, len);
 959
 960                 ring_doorbell = ((q->head_idx + 1) &
 961                         IONIC_RX_RING_DOORBELL_STRIDE) == 0;
 962
 963                 ionic_q_post(q, ring_doorbell, ionic_rx_clean, rxm);
 964         }
 965
 966         return 0;
 967 }
 968
 969 /*
 970  * Start Receive Units for specified queue.
 971  */
 972 int __rte_cold
 973 ionic_dev_rx_queue_start(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id)
 974 {
 975         uint32_t frame_size = eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
 976         uint8_t *rx_queue_state = eth_dev->data->rx_queue_state;
 977         struct ionic_qcq *rxq;
 978         int err;
 979
 980         if (rx_queue_state[rx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) {
 981                 IONIC_PRINT(DEBUG, "RX queue %u already started",
 982                         rx_queue_id);
 983                 return 0;
 984         }
 985
 986         rxq = eth_dev->data->rx_queues[rx_queue_id];
 987
 988         IONIC_PRINT(DEBUG, "Starting RX queue %u, %u descs (size: %u)",
 989                 rx_queue_id, rxq->q.num_descs, frame_size);
 990
 991         if (!(rxq->flags & IONIC_QCQ_F_INITED)) {
 992                 err = ionic_lif_rxq_init(rxq);
 993                 if (err)
 994                         return err;
 995         } else {
 996                 ionic_qcq_enable(rxq);
 997         }
 998
 999         /* Allocate buffers for descriptor rings */
1000         if (ionic_rx_fill(rxq, frame_size) != 0) {
1001                 IONIC_PRINT(ERR, "Could not alloc mbuf for queue:%d",
1002                         rx_queue_id);
1003                 return -1;
1004         }
1005
1006         rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1007
1008         return 0;
1009 }
1010
1011 static inline void __rte_cold
1012 ionic_rxq_service(struct ionic_cq *cq, uint32_t work_to_do,
1013                 void *service_cb_arg)
1014 {
1015         struct ionic_queue *q = cq->bound_q;
1016         struct ionic_desc_info *q_desc_info;
1017         struct ionic_rxq_comp *cq_desc_base = cq->base;
1018         struct ionic_rxq_comp *cq_desc;
1019         bool more;
1020         uint32_t curr_q_tail_idx, curr_cq_tail_idx;
1021         uint32_t work_done = 0;
1022
1023         if (work_to_do == 0)
1024                 return;
1025
1026         cq_desc = &cq_desc_base[cq->tail_idx];
1027         while (color_match(cq_desc->pkt_type_color, cq->done_color)) {
1028                 curr_cq_tail_idx = cq->tail_idx;
1029                 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
1030
1031                 if (cq->tail_idx == 0)
1032                         cq->done_color = !cq->done_color;
1033
1034                 /* Prefetch the next 4 descriptors */
1035                 if ((cq->tail_idx & 0x3) == 0)
1036                         rte_prefetch0(&cq_desc_base[cq->tail_idx]);
1037
1038                 do {
1039                         more = (q->tail_idx != cq_desc->comp_index);
1040
1041                         q_desc_info = &q->info[q->tail_idx];
1042
1043                         curr_q_tail_idx = q->tail_idx;
1044                         q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
1045
1046                         /* Prefetch the next 4 descriptors */
1047                         if ((q->tail_idx & 0x3) == 0)
1048                                 /* q desc info */
1049                                 rte_prefetch0(&q->info[q->tail_idx]);
1050
1051                         ionic_rx_clean(q, curr_q_tail_idx, curr_cq_tail_idx,
1052                                 q_desc_info->cb_arg, service_cb_arg);
1053
1054                 } while (more);
1055
1056                 if (++work_done == work_to_do)
1057                         break;
1058
1059                 cq_desc = &cq_desc_base[cq->tail_idx];
1060         }
1061 }
1062
1063 /*
1064  * Stop Receive Units for specified queue.
1065  */
1066 int __rte_cold
1067 ionic_dev_rx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id)
1068 {
1069         struct ionic_qcq *rxq;
1070
1071         IONIC_PRINT(DEBUG, "Stopping RX queue %u", rx_queue_id);
1072
1073         rxq = eth_dev->data->rx_queues[rx_queue_id];
1074
1075         eth_dev->data->rx_queue_state[rx_queue_id] =
1076                 RTE_ETH_QUEUE_STATE_STOPPED;
1077
1078         ionic_qcq_disable(rxq);
1079
1080         /* Flush */
1081         ionic_rxq_service(&rxq->cq, -1, NULL);
1082
1083         return 0;
1084 }
1085
1086 uint16_t
1087 ionic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
1088                 uint16_t nb_pkts)
1089 {
1090         struct ionic_qcq *rxq = (struct ionic_qcq *)rx_queue;
1091         uint32_t frame_size =
1092                 rxq->lif->eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
1093         struct ionic_cq *cq = &rxq->cq;
1094         struct ionic_rx_service service_cb_arg;
1095
1096         service_cb_arg.rx_pkts = rx_pkts;
1097         service_cb_arg.nb_pkts = nb_pkts;
1098         service_cb_arg.nb_rx = 0;
1099
1100         ionic_rxq_service(cq, nb_pkts, &service_cb_arg);
1101
1102         ionic_rx_fill(rxq, frame_size);
1103
1104         return service_cb_arg.nb_rx;
1105 }