drivers/net/bnx2x/bnx2x_rxtx.c

   1 /*
   2  * Copyright (c) 2013-2015 Brocade Communications Systems, Inc.
   3  *
   4  * All rights reserved.
   5  */
   6
   7 #include "bnx2x.h"
   8 #include "bnx2x_rxtx.h"
   9
  10 static inline struct rte_mbuf *
  11 bnx2x_rxmbuf_alloc(struct rte_mempool *mp)
  12 {
  13         struct rte_mbuf *m;
  14
  15         m = __rte_mbuf_raw_alloc(mp);
  16         __rte_mbuf_sanity_check(m, 0);
  17
  18         return m;
  19 }
  20
  21 static const struct rte_memzone *
  22 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
  23                       uint16_t queue_id, uint32_t ring_size, int socket_id)
  24 {
  25         char z_name[RTE_MEMZONE_NAMESIZE];
  26         const struct rte_memzone *mz;
  27
  28         snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
  29                         dev->driver->pci_drv.name, ring_name, dev->data->port_id, queue_id);
  30
  31         mz = rte_memzone_lookup(z_name);
  32         if (mz)
  33                 return mz;
  34
  35         return rte_memzone_reserve_aligned(z_name, ring_size, socket_id, 0, BNX2X_PAGE_SIZE);
  36 }
  37
  38 static void
  39 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
  40 {
  41         uint16_t i;
  42         struct rte_mbuf **sw_ring;
  43
  44         if (NULL != rx_queue) {
  45
  46                 sw_ring = rx_queue->sw_ring;
  47                 if (NULL != sw_ring) {
  48                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
  49                                 if (NULL != sw_ring[i])
  50                                         rte_pktmbuf_free(sw_ring[i]);
  51                         }
  52                         rte_free(sw_ring);
  53                 }
  54                 rte_free(rx_queue);
  55         }
  56 }
  57
  58 void
  59 bnx2x_dev_rx_queue_release(void *rxq)
  60 {
  61         bnx2x_rx_queue_release(rxq);
  62 }
  63
  64 int
  65 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
  66                        uint16_t queue_idx,
  67                        uint16_t nb_desc,
  68                        unsigned int socket_id,
  69                        const struct rte_eth_rxconf *rx_conf,
  70                        struct rte_mempool *mp)
  71 {
  72         uint16_t j, idx;
  73         const struct rte_memzone *dma;
  74         struct bnx2x_rx_queue *rxq;
  75         uint32_t dma_size;
  76         struct rte_mbuf *mbuf;
  77         struct bnx2x_softc *sc = dev->data->dev_private;
  78         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
  79         struct eth_rx_cqe_next_page *nextpg;
  80         phys_addr_t *rx_bd;
  81         phys_addr_t busaddr;
  82
  83         /* First allocate the rx queue data structure */
  84         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
  85                                  RTE_CACHE_LINE_SIZE, socket_id);
  86         if (NULL == rxq) {
  87                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
  88                 return (-ENOMEM);
  89         }
  90         rxq->sc = sc;
  91         rxq->mb_pool = mp;
  92         rxq->queue_id = queue_idx;
  93         rxq->port_id = dev->data->port_id;
  94         rxq->crc_len = (uint8_t)((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 : ETHER_CRC_LEN);
  95
  96         rxq->nb_rx_pages = 1;
  97         while (USABLE_RX_BD(rxq) < nb_desc)
  98                 rxq->nb_rx_pages <<= 1;
  99
 100         rxq->nb_rx_desc  = TOTAL_RX_BD(rxq);
 101         sc->rx_ring_size = USABLE_RX_BD(rxq);
 102         rxq->nb_cq_pages = RCQ_BD_PAGES(rxq);
 103
 104         rxq->rx_free_thresh = rx_conf->rx_free_thresh ?
 105                 rx_conf->rx_free_thresh : DEFAULT_RX_FREE_THRESH;
 106
 107         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 108                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
 109                        queue_idx, nb_desc, rxq->rx_free_thresh, USABLE_RX_BD(rxq),
 110                        TOTAL_RX_BD(rxq), rxq->nb_rx_pages, rxq->nb_cq_pages);
 111
 112         /* Allocate RX ring hardware descriptors */
 113         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
 114         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
 115         if (NULL == dma) {
 116                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
 117                 bnx2x_rx_queue_release(rxq);
 118                 return (-ENOMEM);
 119         }
 120         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->phys_addr;
 121         rxq->rx_ring = (uint64_t*)dma->addr;
 122         memset((void *)rxq->rx_ring, 0, dma_size);
 123
 124         /* Link the RX chain pages. */
 125         for (j = 1; j <= rxq->nb_rx_pages; j++) {
 126                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
 127                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
 128                 *rx_bd = busaddr;
 129         }
 130
 131         /* Allocate software ring */
 132         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
 133         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
 134                                           RTE_CACHE_LINE_SIZE,
 135                                           socket_id);
 136         if (NULL == rxq->sw_ring) {
 137                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
 138                 bnx2x_rx_queue_release(rxq);
 139                 return (-ENOMEM);
 140         }
 141
 142         /* Initialize software ring entries */
 143         rxq->rx_mbuf_alloc = 0;
 144         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
 145                 mbuf = bnx2x_rxmbuf_alloc(mp);
 146                 if (NULL == mbuf) {
 147                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
 148                                    (unsigned)rxq->queue_id, idx);
 149                         bnx2x_rx_queue_release(rxq);
 150                         return (-ENOMEM);
 151                 }
 152                 rxq->sw_ring[idx] = mbuf;
 153                 rxq->rx_ring[idx] = mbuf->buf_physaddr;
 154                 rxq->rx_mbuf_alloc++;
 155         }
 156         rxq->pkt_first_seg = NULL;
 157         rxq->pkt_last_seg = NULL;
 158         rxq->rx_bd_head = 0;
 159         rxq->rx_bd_tail = rxq->nb_rx_desc;
 160
 161         /* Allocate CQ chain. */
 162         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
 163         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
 164         if (NULL == dma) {
 165                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
 166                 return (-ENOMEM);
 167         }
 168         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->phys_addr;
 169         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
 170
 171         /* Link the CQ chain pages. */
 172         for (j = 1; j <= rxq->nb_cq_pages; j++) {
 173                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
 174                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
 175                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 176                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 177         }
 178         rxq->rx_cq_head = 0;
 179         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
 180
 181         dev->data->rx_queues[queue_idx] = rxq;
 182         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
 183
 184         return 0;
 185 }
 186
 187 static void
 188 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
 189 {
 190         uint16_t i;
 191         struct rte_mbuf **sw_ring;
 192
 193         if (NULL != tx_queue) {
 194
 195                 sw_ring = tx_queue->sw_ring;
 196                 if (NULL != sw_ring) {
 197                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
 198                                 if (NULL != sw_ring[i])
 199                                         rte_pktmbuf_free(sw_ring[i]);
 200                         }
 201                         rte_free(sw_ring);
 202                 }
 203                 rte_free(tx_queue);
 204         }
 205 }
 206
 207 void
 208 bnx2x_dev_tx_queue_release(void *txq)
 209 {
 210         bnx2x_tx_queue_release(txq);
 211 }
 212
 213 static uint16_t
 214 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 215 {
 216         struct bnx2x_tx_queue *txq;
 217         struct bnx2x_softc *sc;
 218         struct bnx2x_fastpath *fp;
 219         uint32_t burst, nb_tx;
 220         struct rte_mbuf **m = tx_pkts;
 221         int ret;
 222
 223         txq = p_txq;
 224         sc = txq->sc;
 225         fp = &sc->fp[txq->queue_id];
 226
 227         nb_tx = nb_pkts;
 228
 229         do {
 230                 burst = RTE_MIN(nb_pkts, RTE_PMD_BNX2X_TX_MAX_BURST);
 231
 232                 ret = bnx2x_tx_encap(txq, m, burst);
 233                 if (unlikely(ret)) {
 234                         PMD_TX_LOG(ERR, "tx_encap failed!");
 235                 }
 236
 237                 bnx2x_update_fp_sb_idx(fp);
 238
 239                 if ((txq->nb_tx_desc - txq->nb_tx_avail) > txq->tx_free_thresh) {
 240                         bnx2x_txeof(sc, fp);
 241                 }
 242
 243                 if (unlikely(ret == -ENOMEM)) {
 244                         break;
 245                 }
 246
 247                 m += burst;
 248                 nb_pkts -= burst;
 249
 250         } while (nb_pkts);
 251
 252         return nb_tx - nb_pkts;
 253 }
 254
 255 int
 256 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
 257                        uint16_t queue_idx,
 258                        uint16_t nb_desc,
 259                        unsigned int socket_id,
 260                        const struct rte_eth_txconf *tx_conf)
 261 {
 262         uint16_t i;
 263         unsigned int tsize;
 264         const struct rte_memzone *tz;
 265         struct bnx2x_tx_queue *txq;
 266         struct eth_tx_next_bd *tx_n_bd;
 267         uint64_t busaddr;
 268         struct bnx2x_softc *sc = dev->data->dev_private;
 269         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
 270
 271         /* First allocate the tx queue data structure */
 272         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
 273                           RTE_CACHE_LINE_SIZE);
 274         if (txq == NULL)
 275                 return (-ENOMEM);
 276         txq->sc = sc;
 277
 278         txq->nb_tx_pages = 1;
 279         while (USABLE_TX_BD(txq) < nb_desc)
 280                 txq->nb_tx_pages <<= 1;
 281
 282         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
 283         sc->tx_ring_size = TOTAL_TX_BD(txq);
 284
 285         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
 286                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
 287
 288         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 289                      "total_bd=%lu, tx_pages=%u",
 290                      queue_idx, nb_desc, txq->tx_free_thresh, USABLE_TX_BD(txq),
 291                      TOTAL_TX_BD(txq), txq->nb_tx_pages);
 292
 293         /* Allocate TX ring hardware descriptors */
 294         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 295         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 296         if (tz == NULL) {
 297                 bnx2x_tx_queue_release(txq);
 298                 return (-ENOMEM);
 299         }
 300         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->phys_addr;
 301         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 302         memset(txq->tx_ring, 0, tsize);
 303
 304         /* Allocate software ring */
 305         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 306         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 307                                    RTE_CACHE_LINE_SIZE);
 308         if (txq->sw_ring == NULL) {
 309                 bnx2x_tx_queue_release(txq);
 310                 return (-ENOMEM);
 311         }
 312
 313         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 314            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 315
 316         /* Link TX pages */
 317         for (i = 1; i <= txq->nb_tx_pages; i++) {
 318                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 319                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 320                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 321                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 322                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
 323         }
 324
 325         txq->queue_id = queue_idx;
 326         txq->port_id = dev->data->port_id;
 327         txq->tx_pkt_tail = 0;
 328         txq->tx_pkt_head = 0;
 329         txq->tx_bd_tail = 0;
 330         txq->tx_bd_head = 0;
 331         txq->nb_tx_avail = txq->nb_tx_desc;
 332         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 333         dev->data->tx_queues[queue_idx] = txq;
 334         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 335
 336         return 0;
 337 }
 338
 339 static inline void
 340 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 341                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 342 {
 343         union ustorm_eth_rx_producers rx_prods;
 344
 345         rx_prods.prod.bd_prod  = rx_bd_prod;
 346         rx_prods.prod.cqe_prod = rx_cq_prod;
 347
 348         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
 349 }
 350
 351 static uint16_t
 352 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 353 {
 354         struct bnx2x_rx_queue *rxq = p_rxq;
 355         struct bnx2x_softc *sc = rxq->sc;
 356         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 357         uint32_t nb_rx = 0;
 358         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 359         uint16_t bd_cons, bd_prod;
 360         struct rte_mbuf *new_mb;
 361         uint16_t rx_pref;
 362         struct eth_fast_path_rx_cqe *cqe_fp;
 363         uint16_t len, pad;
 364         struct rte_mbuf *rx_mb = NULL;
 365
 366         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 367         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 368                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 369                 ++hw_cq_cons;
 370         }
 371
 372         bd_cons = rxq->rx_bd_head;
 373         bd_prod = rxq->rx_bd_tail;
 374         sw_cq_cons = rxq->rx_cq_head;
 375         sw_cq_prod = rxq->rx_cq_tail;
 376
 377         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
 378
 379                 bd_prod &= MAX_RX_BD(rxq);
 380                 bd_cons &= MAX_RX_BD(rxq);
 381
 382                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
 383
 384                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
 385                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
 386                         break;
 387                 }
 388
 389                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
 390                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
 391                                         cqe_fp->type_error_flags, sw_cq_cons);
 392                         goto next_rx;
 393                 }
 394
 395                 len = cqe_fp->pkt_len_or_gro_seg_len;
 396                 pad = cqe_fp->placement_offset;
 397
 398                 new_mb = bnx2x_rxmbuf_alloc(rxq->mb_pool);
 399                 if (unlikely(!new_mb)) {
 400                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 401                         goto next_rx;
 402                 }
 403
 404                 rx_mb = rxq->sw_ring[bd_cons];
 405                 rxq->sw_ring[bd_cons] = new_mb;
 406                 rxq->rx_ring[bd_prod] = new_mb->buf_physaddr;
 407
 408                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
 409                 rte_prefetch0(rxq->sw_ring[rx_pref]);
 410                 if ((rx_pref & 0x3) == 0) {
 411                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
 412                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
 413                 }
 414
 415                 rx_mb->data_off = pad;
 416                 rx_mb->nb_segs = 1;
 417                 rx_mb->next = NULL;
 418                 rx_mb->pkt_len = rx_mb->data_len = len;
 419                 rx_mb->port = rxq->port_id;
 420                 rx_mb->buf_len = len + pad;
 421                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
 422
 423                 /*
 424                  * If we received a packet with a vlan tag,
 425                  * attach that information to the packet.
 426                  */
 427                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
 428                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
 429                         rx_mb->ol_flags |= PKT_RX_VLAN_PKT;
 430                 }
 431
 432                 rx_pkts[nb_rx] = rx_mb;
 433                 nb_rx++;
 434
 435                 /* limit spinning on the queue */
 436                 if (unlikely(nb_rx == sc->rx_budget)) {
 437                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
 438                         break;
 439                 }
 440
 441 next_rx:
 442                 bd_cons    = NEXT_RX_BD(bd_cons);
 443                 bd_prod    = NEXT_RX_BD(bd_prod);
 444                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
 445                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
 446         }
 447         rxq->rx_bd_head = bd_cons;
 448         rxq->rx_bd_tail = bd_prod;
 449         rxq->rx_cq_head = sw_cq_cons;
 450         rxq->rx_cq_tail = sw_cq_prod;
 451
 452         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
 453
 454         return nb_rx;
 455 }
 456
 457 int
 458 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
 459 {
 460         dev->rx_pkt_burst = bnx2x_recv_pkts;
 461
 462         return 0;
 463 }
 464
 465 void
 466 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 467 {
 468         uint8_t i;
 469
 470         PMD_INIT_FUNC_TRACE();
 471
 472         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 473                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 474                 if (txq != NULL) {
 475                         bnx2x_tx_queue_release(txq);
 476                         dev->data->tx_queues[i] = NULL;
 477                 }
 478         }
 479
 480         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 481                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 482                 if (rxq != NULL) {
 483                         bnx2x_rx_queue_release(rxq);
 484                         dev->data->rx_queues[i] = NULL;
 485                 }
 486         }
 487 }