drivers/net/bnx2x/bnx2x_rxtx.c

   1 /*
   2  * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
   3  *
   4  * Copyright (c) 2015 QLogic Corporation.
   5  * All rights reserved.
   6  * www.qlogic.com
   7  *
   8  * See LICENSE.bnx2x_pmd for copyright and licensing details.
   9  */
  10
  11 #include "bnx2x.h"
  12 #include "bnx2x_rxtx.h"
  13
  14 static const struct rte_memzone *
  15 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
  16                       uint16_t queue_id, uint32_t ring_size, int socket_id)
  17 {
  18         char z_name[RTE_MEMZONE_NAMESIZE];
  19         const struct rte_memzone *mz;
  20
  21         snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
  22                         dev->device->driver->name, ring_name,
  23                         dev->data->port_id, queue_id);
  24
  25         mz = rte_memzone_lookup(z_name);
  26         if (mz)
  27                 return mz;
  28
  29         return rte_memzone_reserve_aligned(z_name, ring_size, socket_id,
  30                         RTE_MEMZONE_IOVA_CONTIG, BNX2X_PAGE_SIZE);
  31 }
  32
  33 static void
  34 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
  35 {
  36         uint16_t i;
  37         struct rte_mbuf **sw_ring;
  38
  39         if (NULL != rx_queue) {
  40
  41                 sw_ring = rx_queue->sw_ring;
  42                 if (NULL != sw_ring) {
  43                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
  44                                 if (NULL != sw_ring[i])
  45                                         rte_pktmbuf_free(sw_ring[i]);
  46                         }
  47                         rte_free(sw_ring);
  48                 }
  49                 rte_free(rx_queue);
  50         }
  51 }
  52
  53 void
  54 bnx2x_dev_rx_queue_release(void *rxq)
  55 {
  56         bnx2x_rx_queue_release(rxq);
  57 }
  58
  59 int
  60 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
  61                        uint16_t queue_idx,
  62                        uint16_t nb_desc,
  63                        unsigned int socket_id,
  64                        __rte_unused const struct rte_eth_rxconf *rx_conf,
  65                        struct rte_mempool *mp)
  66 {
  67         uint16_t j, idx;
  68         const struct rte_memzone *dma;
  69         struct bnx2x_rx_queue *rxq;
  70         uint32_t dma_size;
  71         struct rte_mbuf *mbuf;
  72         struct bnx2x_softc *sc = dev->data->dev_private;
  73         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
  74         struct eth_rx_cqe_next_page *nextpg;
  75         rte_iova_t *rx_bd;
  76         rte_iova_t busaddr;
  77
  78         /* First allocate the rx queue data structure */
  79         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
  80                                  RTE_CACHE_LINE_SIZE, socket_id);
  81         if (NULL == rxq) {
  82                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
  83                 return -ENOMEM;
  84         }
  85         rxq->sc = sc;
  86         rxq->mb_pool = mp;
  87         rxq->queue_id = queue_idx;
  88         rxq->port_id = dev->data->port_id;
  89
  90         rxq->nb_rx_pages = 1;
  91         while (USABLE_RX_BD(rxq) < nb_desc)
  92                 rxq->nb_rx_pages <<= 1;
  93
  94         rxq->nb_rx_desc  = TOTAL_RX_BD(rxq);
  95         sc->rx_ring_size = USABLE_RX_BD(rxq);
  96         rxq->nb_cq_pages = RCQ_BD_PAGES(rxq);
  97
  98         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, usable_bd=%lu, "
  99                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
 100                        queue_idx, nb_desc, (unsigned long)USABLE_RX_BD(rxq),
 101                        (unsigned long)TOTAL_RX_BD(rxq), rxq->nb_rx_pages,
 102                        rxq->nb_cq_pages);
 103
 104         /* Allocate RX ring hardware descriptors */
 105         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
 106         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
 107         if (NULL == dma) {
 108                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
 109                 bnx2x_rx_queue_release(rxq);
 110                 return -ENOMEM;
 111         }
 112         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->iova;
 113         rxq->rx_ring = (uint64_t*)dma->addr;
 114         memset((void *)rxq->rx_ring, 0, dma_size);
 115
 116         /* Link the RX chain pages. */
 117         for (j = 1; j <= rxq->nb_rx_pages; j++) {
 118                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
 119                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
 120                 *rx_bd = busaddr;
 121         }
 122
 123         /* Allocate software ring */
 124         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
 125         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
 126                                           RTE_CACHE_LINE_SIZE,
 127                                           socket_id);
 128         if (NULL == rxq->sw_ring) {
 129                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
 130                 bnx2x_rx_queue_release(rxq);
 131                 return -ENOMEM;
 132         }
 133
 134         /* Initialize software ring entries */
 135         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
 136                 mbuf = rte_mbuf_raw_alloc(mp);
 137                 if (NULL == mbuf) {
 138                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
 139                                    (unsigned)rxq->queue_id, idx);
 140                         bnx2x_rx_queue_release(rxq);
 141                         return -ENOMEM;
 142                 }
 143                 rxq->sw_ring[idx] = mbuf;
 144                 rxq->rx_ring[idx] = mbuf->buf_iova;
 145         }
 146         rxq->pkt_first_seg = NULL;
 147         rxq->pkt_last_seg = NULL;
 148         rxq->rx_bd_head = 0;
 149         rxq->rx_bd_tail = rxq->nb_rx_desc;
 150
 151         /* Allocate CQ chain. */
 152         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
 153         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
 154         if (NULL == dma) {
 155                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
 156                 return -ENOMEM;
 157         }
 158         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->iova;
 159         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
 160
 161         /* Link the CQ chain pages. */
 162         for (j = 1; j <= rxq->nb_cq_pages; j++) {
 163                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
 164                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
 165                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 166                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 167         }
 168         rxq->rx_cq_head = 0;
 169         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
 170
 171         dev->data->rx_queues[queue_idx] = rxq;
 172         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
 173
 174         return 0;
 175 }
 176
 177 static void
 178 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
 179 {
 180         uint16_t i;
 181         struct rte_mbuf **sw_ring;
 182
 183         if (NULL != tx_queue) {
 184
 185                 sw_ring = tx_queue->sw_ring;
 186                 if (NULL != sw_ring) {
 187                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
 188                                 if (NULL != sw_ring[i])
 189                                         rte_pktmbuf_free(sw_ring[i]);
 190                         }
 191                         rte_free(sw_ring);
 192                 }
 193                 rte_free(tx_queue);
 194         }
 195 }
 196
 197 void
 198 bnx2x_dev_tx_queue_release(void *txq)
 199 {
 200         bnx2x_tx_queue_release(txq);
 201 }
 202
 203 static uint16_t
 204 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 205 {
 206         struct bnx2x_tx_queue *txq;
 207         struct bnx2x_softc *sc;
 208         struct bnx2x_fastpath *fp;
 209         uint16_t nb_tx_pkts;
 210         uint16_t nb_pkt_sent = 0;
 211         uint32_t ret;
 212
 213         txq = p_txq;
 214         sc = txq->sc;
 215         fp = &sc->fp[txq->queue_id];
 216
 217         if ((unlikely((txq->nb_tx_desc - txq->nb_tx_avail) >
 218                                 txq->tx_free_thresh)))
 219                 bnx2x_txeof(sc, fp);
 220
 221         nb_tx_pkts = RTE_MIN(nb_pkts, txq->nb_tx_avail / BDS_PER_TX_PKT);
 222         if (unlikely(nb_tx_pkts == 0))
 223                 return 0;
 224
 225         while (nb_tx_pkts--) {
 226                 struct rte_mbuf *m = *tx_pkts++;
 227                 assert(m != NULL);
 228                 ret = bnx2x_tx_encap(txq, m);
 229                 fp->tx_db.data.prod += ret;
 230                 nb_pkt_sent++;
 231         }
 232
 233         bnx2x_update_fp_sb_idx(fp);
 234         mb();
 235         DOORBELL(sc, txq->queue_id, fp->tx_db.raw);
 236         mb();
 237
 238         if ((txq->nb_tx_desc - txq->nb_tx_avail) >
 239                                 txq->tx_free_thresh)
 240                 bnx2x_txeof(sc, fp);
 241
 242         return nb_pkt_sent;
 243 }
 244
 245 int
 246 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
 247                        uint16_t queue_idx,
 248                        uint16_t nb_desc,
 249                        unsigned int socket_id,
 250                        const struct rte_eth_txconf *tx_conf)
 251 {
 252         uint16_t i;
 253         unsigned int tsize;
 254         const struct rte_memzone *tz;
 255         struct bnx2x_tx_queue *txq;
 256         struct eth_tx_next_bd *tx_n_bd;
 257         uint64_t busaddr;
 258         struct bnx2x_softc *sc = dev->data->dev_private;
 259         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
 260
 261         /* First allocate the tx queue data structure */
 262         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
 263                           RTE_CACHE_LINE_SIZE);
 264         if (txq == NULL)
 265                 return -ENOMEM;
 266         txq->sc = sc;
 267
 268         txq->nb_tx_pages = 1;
 269         while (USABLE_TX_BD(txq) < nb_desc)
 270                 txq->nb_tx_pages <<= 1;
 271
 272         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
 273         sc->tx_ring_size = TOTAL_TX_BD(txq);
 274
 275         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
 276                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
 277         txq->tx_free_thresh = min(txq->tx_free_thresh,
 278                                   txq->nb_tx_desc - BDS_PER_TX_PKT);
 279
 280         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 281                      "total_bd=%lu, tx_pages=%u",
 282                      queue_idx, nb_desc, txq->tx_free_thresh,
 283                      (unsigned long)USABLE_TX_BD(txq),
 284                      (unsigned long)TOTAL_TX_BD(txq), txq->nb_tx_pages);
 285
 286         /* Allocate TX ring hardware descriptors */
 287         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 288         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 289         if (tz == NULL) {
 290                 bnx2x_tx_queue_release(txq);
 291                 return -ENOMEM;
 292         }
 293         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->iova;
 294         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 295         memset(txq->tx_ring, 0, tsize);
 296
 297         /* Allocate software ring */
 298         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 299         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 300                                    RTE_CACHE_LINE_SIZE);
 301         if (txq->sw_ring == NULL) {
 302                 bnx2x_tx_queue_release(txq);
 303                 return -ENOMEM;
 304         }
 305
 306         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 307            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 308
 309         /* Link TX pages */
 310         for (i = 1; i <= txq->nb_tx_pages; i++) {
 311                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 312                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 313                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 314                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 315                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
 316         }
 317
 318         txq->queue_id = queue_idx;
 319         txq->port_id = dev->data->port_id;
 320         txq->tx_pkt_tail = 0;
 321         txq->tx_pkt_head = 0;
 322         txq->tx_bd_tail = 0;
 323         txq->tx_bd_head = 0;
 324         txq->nb_tx_avail = txq->nb_tx_desc;
 325         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 326         dev->data->tx_queues[queue_idx] = txq;
 327         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 328
 329         return 0;
 330 }
 331
 332 static inline void
 333 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 334                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 335 {
 336         union ustorm_eth_rx_producers rx_prods;
 337
 338         rx_prods.prod.bd_prod  = rx_bd_prod;
 339         rx_prods.prod.cqe_prod = rx_cq_prod;
 340
 341         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
 342 }
 343
 344 static uint16_t
 345 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 346 {
 347         struct bnx2x_rx_queue *rxq = p_rxq;
 348         struct bnx2x_softc *sc = rxq->sc;
 349         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 350         uint32_t nb_rx = 0;
 351         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 352         uint16_t bd_cons, bd_prod;
 353         struct rte_mbuf *new_mb;
 354         uint16_t rx_pref;
 355         struct eth_fast_path_rx_cqe *cqe_fp;
 356         uint16_t len, pad;
 357         struct rte_mbuf *rx_mb = NULL;
 358
 359         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 360         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 361                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 362                 ++hw_cq_cons;
 363         }
 364
 365         bd_cons = rxq->rx_bd_head;
 366         bd_prod = rxq->rx_bd_tail;
 367         sw_cq_cons = rxq->rx_cq_head;
 368         sw_cq_prod = rxq->rx_cq_tail;
 369
 370         if (sw_cq_cons == hw_cq_cons)
 371                 return 0;
 372
 373         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
 374
 375                 bd_prod &= MAX_RX_BD(rxq);
 376                 bd_cons &= MAX_RX_BD(rxq);
 377
 378                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
 379
 380                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
 381                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
 382                         break;
 383                 }
 384
 385                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
 386                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
 387                                         cqe_fp->type_error_flags, sw_cq_cons);
 388                         goto next_rx;
 389                 }
 390
 391                 len = cqe_fp->pkt_len_or_gro_seg_len;
 392                 pad = cqe_fp->placement_offset;
 393
 394                 new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
 395                 if (unlikely(!new_mb)) {
 396                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 397                         rte_eth_devices[rxq->port_id].data->
 398                                         rx_mbuf_alloc_failed++;
 399                         goto next_rx;
 400                 }
 401
 402                 rx_mb = rxq->sw_ring[bd_cons];
 403                 rxq->sw_ring[bd_cons] = new_mb;
 404                 rxq->rx_ring[bd_prod] = new_mb->buf_iova;
 405
 406                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
 407                 rte_prefetch0(rxq->sw_ring[rx_pref]);
 408                 if ((rx_pref & 0x3) == 0) {
 409                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
 410                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
 411                 }
 412
 413                 rx_mb->data_off = pad;
 414                 rx_mb->nb_segs = 1;
 415                 rx_mb->next = NULL;
 416                 rx_mb->pkt_len = rx_mb->data_len = len;
 417                 rx_mb->port = rxq->port_id;
 418                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
 419
 420                 /*
 421                  * If we received a packet with a vlan tag,
 422                  * attach that information to the packet.
 423                  */
 424                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
 425                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
 426                         rx_mb->ol_flags |= PKT_RX_VLAN;
 427                 }
 428
 429                 rx_pkts[nb_rx] = rx_mb;
 430                 nb_rx++;
 431
 432                 /* limit spinning on the queue */
 433                 if (unlikely(nb_rx == sc->rx_budget)) {
 434                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
 435                         break;
 436                 }
 437
 438 next_rx:
 439                 bd_cons    = NEXT_RX_BD(bd_cons);
 440                 bd_prod    = NEXT_RX_BD(bd_prod);
 441                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
 442                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
 443         }
 444         rxq->rx_bd_head = bd_cons;
 445         rxq->rx_bd_tail = bd_prod;
 446         rxq->rx_cq_head = sw_cq_cons;
 447         rxq->rx_cq_tail = sw_cq_prod;
 448
 449         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
 450
 451         return nb_rx;
 452 }
 453
 454 int
 455 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
 456 {
 457         dev->rx_pkt_burst = bnx2x_recv_pkts;
 458
 459         return 0;
 460 }
 461
 462 void
 463 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 464 {
 465         uint8_t i;
 466
 467         PMD_INIT_FUNC_TRACE();
 468
 469         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 470                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 471                 if (txq != NULL) {
 472                         bnx2x_tx_queue_release(txq);
 473                         dev->data->tx_queues[i] = NULL;
 474                 }
 475         }
 476
 477         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 478                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 479                 if (rxq != NULL) {
 480                         bnx2x_rx_queue_release(rxq);
 481                         dev->data->rx_queues[i] = NULL;
 482                 }
 483         }
 484 }