drivers/net/bnx2x/bnx2x_rxtx.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
   3  * Copyright (c) 2015-2018 Cavium Inc.
   4  * All rights reserved.
   5  * www.cavium.com
   6  */
   7
   8 #include "bnx2x.h"
   9 #include "bnx2x_rxtx.h"
  10
  11 static const struct rte_memzone *
  12 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
  13                       uint16_t queue_id, uint32_t ring_size, int socket_id)
  14 {
  15         return rte_eth_dma_zone_reserve(dev, ring_name, queue_id,
  16                         ring_size, BNX2X_PAGE_SIZE, socket_id);
  17 }
  18
  19 static void
  20 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
  21 {
  22         uint16_t i;
  23         struct rte_mbuf **sw_ring;
  24
  25         if (NULL != rx_queue) {
  26
  27                 sw_ring = rx_queue->sw_ring;
  28                 if (NULL != sw_ring) {
  29                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
  30                                 rte_pktmbuf_free(sw_ring[i]);
  31                         }
  32                         rte_free(sw_ring);
  33                 }
  34                 rte_free(rx_queue);
  35         }
  36 }
  37
  38 void
  39 bnx2x_dev_rx_queue_release(struct rte_eth_dev *dev, uint16_t queue_idx)
  40 {
  41         bnx2x_rx_queue_release(dev->data->rx_queues[queue_idx]);
  42 }
  43
  44 int
  45 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
  46                        uint16_t queue_idx,
  47                        uint16_t nb_desc,
  48                        unsigned int socket_id,
  49                        __rte_unused const struct rte_eth_rxconf *rx_conf,
  50                        struct rte_mempool *mp)
  51 {
  52         uint16_t j, idx;
  53         const struct rte_memzone *dma;
  54         struct bnx2x_rx_queue *rxq;
  55         uint32_t dma_size;
  56         struct rte_mbuf *mbuf;
  57         struct bnx2x_softc *sc = dev->data->dev_private;
  58         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
  59         struct eth_rx_cqe_next_page *nextpg;
  60         rte_iova_t *rx_bd;
  61         rte_iova_t busaddr;
  62
  63         /* First allocate the rx queue data structure */
  64         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
  65                                  RTE_CACHE_LINE_SIZE, socket_id);
  66         if (NULL == rxq) {
  67                 PMD_DRV_LOG(ERR, sc, "rte_zmalloc for rxq failed!");
  68                 return -ENOMEM;
  69         }
  70         rxq->sc = sc;
  71         rxq->mb_pool = mp;
  72         rxq->queue_id = queue_idx;
  73         rxq->port_id = dev->data->port_id;
  74
  75         rxq->nb_rx_pages = 1;
  76         while (USABLE_RX_BD(rxq) < nb_desc)
  77                 rxq->nb_rx_pages <<= 1;
  78
  79         rxq->nb_rx_desc  = TOTAL_RX_BD(rxq);
  80         sc->rx_ring_size = USABLE_RX_BD(rxq);
  81         rxq->nb_cq_pages = RCQ_BD_PAGES(rxq);
  82
  83         PMD_DRV_LOG(DEBUG, sc, "fp[%02d] req_bd=%u, usable_bd=%lu, "
  84                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
  85                        queue_idx, nb_desc, (unsigned long)USABLE_RX_BD(rxq),
  86                        (unsigned long)TOTAL_RX_BD(rxq), rxq->nb_rx_pages,
  87                        rxq->nb_cq_pages);
  88
  89         /* Allocate RX ring hardware descriptors */
  90         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
  91         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
  92         if (NULL == dma) {
  93                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
  94                 bnx2x_rx_queue_release(rxq);
  95                 return -ENOMEM;
  96         }
  97         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->iova;
  98         rxq->rx_ring = (uint64_t*)dma->addr;
  99         memset((void *)rxq->rx_ring, 0, dma_size);
 100
 101         /* Link the RX chain pages. */
 102         for (j = 1; j <= rxq->nb_rx_pages; j++) {
 103                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
 104                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
 105                 *rx_bd = busaddr;
 106         }
 107
 108         /* Allocate software ring */
 109         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
 110         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
 111                                           RTE_CACHE_LINE_SIZE,
 112                                           socket_id);
 113         if (NULL == rxq->sw_ring) {
 114                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
 115                 bnx2x_rx_queue_release(rxq);
 116                 return -ENOMEM;
 117         }
 118
 119         /* Initialize software ring entries */
 120         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
 121                 mbuf = rte_mbuf_raw_alloc(mp);
 122                 if (NULL == mbuf) {
 123                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
 124                                    (unsigned)rxq->queue_id, idx);
 125                         bnx2x_rx_queue_release(rxq);
 126                         return -ENOMEM;
 127                 }
 128                 rxq->sw_ring[idx] = mbuf;
 129                 rxq->rx_ring[idx] =
 130                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
 131         }
 132         rxq->pkt_first_seg = NULL;
 133         rxq->pkt_last_seg = NULL;
 134         rxq->rx_bd_head = 0;
 135         rxq->rx_bd_tail = rxq->nb_rx_desc;
 136
 137         /* Allocate CQ chain. */
 138         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
 139         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
 140         if (NULL == dma) {
 141                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
 142                 return -ENOMEM;
 143         }
 144         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->iova;
 145         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
 146
 147         /* Link the CQ chain pages. */
 148         for (j = 1; j <= rxq->nb_cq_pages; j++) {
 149                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
 150                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
 151                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 152                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 153         }
 154         rxq->rx_cq_head = 0;
 155         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
 156
 157         dev->data->rx_queues[queue_idx] = rxq;
 158         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
 159
 160         return 0;
 161 }
 162
 163 static void
 164 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
 165 {
 166         uint16_t i;
 167         struct rte_mbuf **sw_ring;
 168
 169         if (NULL != tx_queue) {
 170
 171                 sw_ring = tx_queue->sw_ring;
 172                 if (NULL != sw_ring) {
 173                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
 174                                 rte_pktmbuf_free(sw_ring[i]);
 175                         }
 176                         rte_free(sw_ring);
 177                 }
 178                 rte_free(tx_queue);
 179         }
 180 }
 181
 182 void
 183 bnx2x_dev_tx_queue_release(struct rte_eth_dev *dev, uint16_t queue_idx)
 184 {
 185         bnx2x_tx_queue_release(dev->data->tx_queues[queue_idx]);
 186 }
 187
 188 static uint16_t
 189 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 190 {
 191         struct bnx2x_tx_queue *txq;
 192         struct bnx2x_softc *sc;
 193         struct bnx2x_fastpath *fp;
 194         uint16_t nb_tx_pkts;
 195         uint16_t nb_pkt_sent = 0;
 196         uint32_t ret;
 197
 198         txq = p_txq;
 199         sc = txq->sc;
 200         fp = &sc->fp[txq->queue_id];
 201
 202         if ((unlikely((txq->nb_tx_desc - txq->nb_tx_avail) >
 203                                 txq->tx_free_thresh)))
 204                 bnx2x_txeof(sc, fp);
 205
 206         nb_tx_pkts = RTE_MIN(nb_pkts, txq->nb_tx_avail / BDS_PER_TX_PKT);
 207         if (unlikely(nb_tx_pkts == 0))
 208                 return 0;
 209
 210         while (nb_tx_pkts--) {
 211                 struct rte_mbuf *m = *tx_pkts++;
 212                 assert(m != NULL);
 213                 ret = bnx2x_tx_encap(txq, m);
 214                 fp->tx_db.data.prod += ret;
 215                 nb_pkt_sent++;
 216         }
 217
 218         bnx2x_update_fp_sb_idx(fp);
 219         mb();
 220         DOORBELL(sc, txq->queue_id, fp->tx_db.raw);
 221         mb();
 222
 223         if ((txq->nb_tx_desc - txq->nb_tx_avail) >
 224                                 txq->tx_free_thresh)
 225                 bnx2x_txeof(sc, fp);
 226
 227         return nb_pkt_sent;
 228 }
 229
 230 int
 231 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
 232                        uint16_t queue_idx,
 233                        uint16_t nb_desc,
 234                        unsigned int socket_id,
 235                        const struct rte_eth_txconf *tx_conf)
 236 {
 237         uint16_t i;
 238         unsigned int tsize;
 239         const struct rte_memzone *tz;
 240         struct bnx2x_tx_queue *txq;
 241         struct eth_tx_next_bd *tx_n_bd;
 242         uint64_t busaddr;
 243         struct bnx2x_softc *sc = dev->data->dev_private;
 244         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
 245
 246         /* First allocate the tx queue data structure */
 247         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
 248                           RTE_CACHE_LINE_SIZE);
 249         if (txq == NULL)
 250                 return -ENOMEM;
 251         txq->sc = sc;
 252
 253         txq->nb_tx_pages = 1;
 254         while (USABLE_TX_BD(txq) < nb_desc)
 255                 txq->nb_tx_pages <<= 1;
 256
 257         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
 258         sc->tx_ring_size = TOTAL_TX_BD(txq);
 259
 260         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
 261                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
 262         txq->tx_free_thresh = min(txq->tx_free_thresh,
 263                                   txq->nb_tx_desc - BDS_PER_TX_PKT);
 264
 265         PMD_DRV_LOG(DEBUG, sc, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 266                      "total_bd=%lu, tx_pages=%u",
 267                      queue_idx, nb_desc, txq->tx_free_thresh,
 268                      (unsigned long)USABLE_TX_BD(txq),
 269                      (unsigned long)TOTAL_TX_BD(txq), txq->nb_tx_pages);
 270
 271         /* Allocate TX ring hardware descriptors */
 272         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 273         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 274         if (tz == NULL) {
 275                 bnx2x_tx_queue_release(txq);
 276                 return -ENOMEM;
 277         }
 278         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->iova;
 279         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 280         memset(txq->tx_ring, 0, tsize);
 281
 282         /* Allocate software ring */
 283         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 284         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 285                                    RTE_CACHE_LINE_SIZE);
 286         if (txq->sw_ring == NULL) {
 287                 bnx2x_tx_queue_release(txq);
 288                 return -ENOMEM;
 289         }
 290
 291         /* PMD_DRV_LOG(DEBUG, sc, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 292            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 293
 294         /* Link TX pages */
 295         for (i = 1; i <= txq->nb_tx_pages; i++) {
 296                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 297                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 298                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 299                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 300                 /* PMD_DRV_LOG(DEBUG, sc, "link tx page %lu",
 301                  *          (TOTAL_TX_BD_PER_PAGE * i - 1));
 302                  */
 303         }
 304
 305         txq->queue_id = queue_idx;
 306         txq->port_id = dev->data->port_id;
 307         txq->tx_pkt_tail = 0;
 308         txq->tx_pkt_head = 0;
 309         txq->tx_bd_tail = 0;
 310         txq->tx_bd_head = 0;
 311         txq->nb_tx_avail = txq->nb_tx_desc;
 312         dev->data->tx_queues[queue_idx] = txq;
 313         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 314
 315         return 0;
 316 }
 317
 318 static inline void
 319 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 320                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 321 {
 322         union {
 323                 struct ustorm_eth_rx_producers rx_prods;
 324                 uint32_t val;
 325         } val = { {0} };
 326
 327         val.rx_prods.bd_prod  = rx_bd_prod;
 328         val.rx_prods.cqe_prod = rx_cq_prod;
 329
 330         REG_WR(sc, fp->ustorm_rx_prods_offset, val.val);
 331 }
 332
 333 static uint16_t
 334 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 335 {
 336         struct bnx2x_rx_queue *rxq = p_rxq;
 337         struct bnx2x_softc *sc = rxq->sc;
 338         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 339         uint32_t nb_rx = 0;
 340         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 341         uint16_t bd_cons, bd_prod;
 342         struct rte_mbuf *new_mb;
 343         uint16_t rx_pref;
 344         struct eth_fast_path_rx_cqe *cqe_fp;
 345         uint16_t len, pad, bd_len, buf_len;
 346         struct rte_mbuf *rx_mb = NULL;
 347         static bool log_once = true;
 348
 349         rte_spinlock_lock(&(fp)->rx_mtx);
 350
 351         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 352         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 353                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 354                 ++hw_cq_cons;
 355         }
 356
 357         bd_cons = rxq->rx_bd_head;
 358         bd_prod = rxq->rx_bd_tail;
 359         sw_cq_cons = rxq->rx_cq_head;
 360         sw_cq_prod = rxq->rx_cq_tail;
 361
 362         if (sw_cq_cons == hw_cq_cons) {
 363                 rte_spinlock_unlock(&(fp)->rx_mtx);
 364                 return 0;
 365         }
 366
 367         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
 368
 369                 bd_prod &= MAX_RX_BD(rxq);
 370                 bd_cons &= MAX_RX_BD(rxq);
 371
 372                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
 373
 374                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
 375                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
 376                         break;
 377                 }
 378
 379                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
 380                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
 381                                         cqe_fp->type_error_flags, sw_cq_cons);
 382                         goto next_rx;
 383                 }
 384
 385                 len = cqe_fp->pkt_len_or_gro_seg_len;
 386                 pad = cqe_fp->placement_offset;
 387                 bd_len = cqe_fp->len_on_bd;
 388                 buf_len = rxq->sw_ring[bd_cons]->buf_len;
 389
 390                 /* Check for sufficient buffer length */
 391                 if (unlikely(buf_len < len + (pad + RTE_PKTMBUF_HEADROOM))) {
 392                         if (unlikely(log_once)) {
 393                                 PMD_DRV_LOG(ERR, sc, "mbuf size %d is not enough to hold Rx packet length more than %d",
 394                                             buf_len - RTE_PKTMBUF_HEADROOM,
 395                                             buf_len -
 396                                             (pad + RTE_PKTMBUF_HEADROOM));
 397                                 log_once = false;
 398                         }
 399                         goto next_rx;
 400                 }
 401
 402                 new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
 403                 if (unlikely(!new_mb)) {
 404                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 405                         rte_eth_devices[rxq->port_id].data->
 406                                         rx_mbuf_alloc_failed++;
 407                         goto next_rx;
 408                 }
 409
 410                 rx_mb = rxq->sw_ring[bd_cons];
 411                 rxq->sw_ring[bd_cons] = new_mb;
 412                 rxq->rx_ring[bd_prod] =
 413                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(new_mb));
 414
 415                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
 416                 rte_prefetch0(rxq->sw_ring[rx_pref]);
 417                 if ((rx_pref & 0x3) == 0) {
 418                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
 419                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
 420                 }
 421
 422                 rx_mb->data_off = pad + RTE_PKTMBUF_HEADROOM;
 423                 rx_mb->nb_segs = 1;
 424                 rx_mb->next = NULL;
 425                 rx_mb->pkt_len = len;
 426                 rx_mb->data_len = bd_len;
 427                 rx_mb->port = rxq->port_id;
 428                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
 429
 430                 /*
 431                  * If we received a packet with a vlan tag,
 432                  * attach that information to the packet.
 433                  */
 434                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
 435                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
 436                         rx_mb->ol_flags |= RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED;
 437                 }
 438
 439                 rx_pkts[nb_rx] = rx_mb;
 440                 nb_rx++;
 441
 442                 /* limit spinning on the queue */
 443                 if (unlikely(nb_rx == sc->rx_budget)) {
 444                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
 445                         break;
 446                 }
 447
 448 next_rx:
 449                 bd_cons    = NEXT_RX_BD(bd_cons);
 450                 bd_prod    = NEXT_RX_BD(bd_prod);
 451                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
 452                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
 453         }
 454         rxq->rx_bd_head = bd_cons;
 455         rxq->rx_bd_tail = bd_prod;
 456         rxq->rx_cq_head = sw_cq_cons;
 457         rxq->rx_cq_tail = sw_cq_prod;
 458
 459         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
 460
 461         rte_spinlock_unlock(&(fp)->rx_mtx);
 462
 463         return nb_rx;
 464 }
 465
 466 void bnx2x_dev_rxtx_init_dummy(struct rte_eth_dev *dev)
 467 {
 468         dev->rx_pkt_burst = rte_eth_pkt_burst_dummy;
 469         dev->tx_pkt_burst = rte_eth_pkt_burst_dummy;
 470 }
 471
 472 void bnx2x_dev_rxtx_init(struct rte_eth_dev *dev)
 473 {
 474         dev->rx_pkt_burst = bnx2x_recv_pkts;
 475         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 476 }
 477
 478 void
 479 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 480 {
 481         struct bnx2x_softc *sc = dev->data->dev_private;
 482         uint8_t i;
 483
 484         PMD_INIT_FUNC_TRACE(sc);
 485
 486         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 487                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 488                 if (txq != NULL) {
 489                         bnx2x_tx_queue_release(txq);
 490                         dev->data->tx_queues[i] = NULL;
 491                 }
 492         }
 493
 494         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 495                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 496                 if (rxq != NULL) {
 497                         bnx2x_rx_queue_release(rxq);
 498                         dev->data->rx_queues[i] = NULL;
 499                 }
 500         }
 501 }