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 inline struct rte_mbuf *
  15 bnx2x_rxmbuf_alloc(struct rte_mempool *mp)
  16 {
  17         struct rte_mbuf *m;
  18
  19         m = __rte_mbuf_raw_alloc(mp);
  20         __rte_mbuf_sanity_check(m, 0);
  21
  22         return m;
  23 }
  24
  25 static const struct rte_memzone *
  26 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
  27                       uint16_t queue_id, uint32_t ring_size, int socket_id)
  28 {
  29         char z_name[RTE_MEMZONE_NAMESIZE];
  30         const struct rte_memzone *mz;
  31
  32         snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
  33                         dev->driver->pci_drv.name, ring_name, dev->data->port_id, queue_id);
  34
  35         mz = rte_memzone_lookup(z_name);
  36         if (mz)
  37                 return mz;
  38
  39         return rte_memzone_reserve_aligned(z_name, ring_size, socket_id, 0, BNX2X_PAGE_SIZE);
  40 }
  41
  42 static void
  43 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
  44 {
  45         uint16_t i;
  46         struct rte_mbuf **sw_ring;
  47
  48         if (NULL != rx_queue) {
  49
  50                 sw_ring = rx_queue->sw_ring;
  51                 if (NULL != sw_ring) {
  52                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
  53                                 if (NULL != sw_ring[i])
  54                                         rte_pktmbuf_free(sw_ring[i]);
  55                         }
  56                         rte_free(sw_ring);
  57                 }
  58                 rte_free(rx_queue);
  59         }
  60 }
  61
  62 void
  63 bnx2x_dev_rx_queue_release(void *rxq)
  64 {
  65         bnx2x_rx_queue_release(rxq);
  66 }
  67
  68 int
  69 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
  70                        uint16_t queue_idx,
  71                        uint16_t nb_desc,
  72                        unsigned int socket_id,
  73                        const struct rte_eth_rxconf *rx_conf,
  74                        struct rte_mempool *mp)
  75 {
  76         uint16_t j, idx;
  77         const struct rte_memzone *dma;
  78         struct bnx2x_rx_queue *rxq;
  79         uint32_t dma_size;
  80         struct rte_mbuf *mbuf;
  81         struct bnx2x_softc *sc = dev->data->dev_private;
  82         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
  83         struct eth_rx_cqe_next_page *nextpg;
  84         phys_addr_t *rx_bd;
  85         phys_addr_t busaddr;
  86
  87         /* First allocate the rx queue data structure */
  88         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
  89                                  RTE_CACHE_LINE_SIZE, socket_id);
  90         if (NULL == rxq) {
  91                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
  92                 return (-ENOMEM);
  93         }
  94         rxq->sc = sc;
  95         rxq->mb_pool = mp;
  96         rxq->queue_id = queue_idx;
  97         rxq->port_id = dev->data->port_id;
  98         rxq->crc_len = (uint8_t)((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 : ETHER_CRC_LEN);
  99
 100         rxq->nb_rx_pages = 1;
 101         while (USABLE_RX_BD(rxq) < nb_desc)
 102                 rxq->nb_rx_pages <<= 1;
 103
 104         rxq->nb_rx_desc  = TOTAL_RX_BD(rxq);
 105         sc->rx_ring_size = USABLE_RX_BD(rxq);
 106         rxq->nb_cq_pages = RCQ_BD_PAGES(rxq);
 107
 108         rxq->rx_free_thresh = rx_conf->rx_free_thresh ?
 109                 rx_conf->rx_free_thresh : DEFAULT_RX_FREE_THRESH;
 110
 111         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 112                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
 113                        queue_idx, nb_desc, rxq->rx_free_thresh, USABLE_RX_BD(rxq),
 114                        TOTAL_RX_BD(rxq), rxq->nb_rx_pages, rxq->nb_cq_pages);
 115
 116         /* Allocate RX ring hardware descriptors */
 117         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
 118         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
 119         if (NULL == dma) {
 120                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
 121                 bnx2x_rx_queue_release(rxq);
 122                 return (-ENOMEM);
 123         }
 124         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->phys_addr;
 125         rxq->rx_ring = (uint64_t*)dma->addr;
 126         memset((void *)rxq->rx_ring, 0, dma_size);
 127
 128         /* Link the RX chain pages. */
 129         for (j = 1; j <= rxq->nb_rx_pages; j++) {
 130                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
 131                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
 132                 *rx_bd = busaddr;
 133         }
 134
 135         /* Allocate software ring */
 136         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
 137         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
 138                                           RTE_CACHE_LINE_SIZE,
 139                                           socket_id);
 140         if (NULL == rxq->sw_ring) {
 141                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
 142                 bnx2x_rx_queue_release(rxq);
 143                 return (-ENOMEM);
 144         }
 145
 146         /* Initialize software ring entries */
 147         rxq->rx_mbuf_alloc = 0;
 148         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
 149                 mbuf = bnx2x_rxmbuf_alloc(mp);
 150                 if (NULL == mbuf) {
 151                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
 152                                    (unsigned)rxq->queue_id, idx);
 153                         bnx2x_rx_queue_release(rxq);
 154                         return (-ENOMEM);
 155                 }
 156                 rxq->sw_ring[idx] = mbuf;
 157                 rxq->rx_ring[idx] = mbuf->buf_physaddr;
 158                 rxq->rx_mbuf_alloc++;
 159         }
 160         rxq->pkt_first_seg = NULL;
 161         rxq->pkt_last_seg = NULL;
 162         rxq->rx_bd_head = 0;
 163         rxq->rx_bd_tail = rxq->nb_rx_desc;
 164
 165         /* Allocate CQ chain. */
 166         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
 167         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
 168         if (NULL == dma) {
 169                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
 170                 return (-ENOMEM);
 171         }
 172         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->phys_addr;
 173         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
 174
 175         /* Link the CQ chain pages. */
 176         for (j = 1; j <= rxq->nb_cq_pages; j++) {
 177                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
 178                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
 179                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 180                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 181         }
 182         rxq->rx_cq_head = 0;
 183         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
 184
 185         dev->data->rx_queues[queue_idx] = rxq;
 186         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
 187
 188         return 0;
 189 }
 190
 191 static void
 192 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
 193 {
 194         uint16_t i;
 195         struct rte_mbuf **sw_ring;
 196
 197         if (NULL != tx_queue) {
 198
 199                 sw_ring = tx_queue->sw_ring;
 200                 if (NULL != sw_ring) {
 201                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
 202                                 if (NULL != sw_ring[i])
 203                                         rte_pktmbuf_free(sw_ring[i]);
 204                         }
 205                         rte_free(sw_ring);
 206                 }
 207                 rte_free(tx_queue);
 208         }
 209 }
 210
 211 void
 212 bnx2x_dev_tx_queue_release(void *txq)
 213 {
 214         bnx2x_tx_queue_release(txq);
 215 }
 216
 217 static uint16_t
 218 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 219 {
 220         struct bnx2x_tx_queue *txq;
 221         struct bnx2x_softc *sc;
 222         struct bnx2x_fastpath *fp;
 223         uint32_t burst, nb_tx;
 224         struct rte_mbuf **m = tx_pkts;
 225         int ret;
 226
 227         txq = p_txq;
 228         sc = txq->sc;
 229         fp = &sc->fp[txq->queue_id];
 230
 231         nb_tx = nb_pkts;
 232
 233         do {
 234                 burst = RTE_MIN(nb_pkts, RTE_PMD_BNX2X_TX_MAX_BURST);
 235
 236                 ret = bnx2x_tx_encap(txq, m, burst);
 237                 if (unlikely(ret)) {
 238                         PMD_TX_LOG(ERR, "tx_encap failed!");
 239                 }
 240
 241                 bnx2x_update_fp_sb_idx(fp);
 242
 243                 if ((txq->nb_tx_desc - txq->nb_tx_avail) > txq->tx_free_thresh) {
 244                         bnx2x_txeof(sc, fp);
 245                 }
 246
 247                 if (unlikely(ret == -ENOMEM)) {
 248                         break;
 249                 }
 250
 251                 m += burst;
 252                 nb_pkts -= burst;
 253
 254         } while (nb_pkts);
 255
 256         return nb_tx - nb_pkts;
 257 }
 258
 259 int
 260 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
 261                        uint16_t queue_idx,
 262                        uint16_t nb_desc,
 263                        unsigned int socket_id,
 264                        const struct rte_eth_txconf *tx_conf)
 265 {
 266         uint16_t i;
 267         unsigned int tsize;
 268         const struct rte_memzone *tz;
 269         struct bnx2x_tx_queue *txq;
 270         struct eth_tx_next_bd *tx_n_bd;
 271         uint64_t busaddr;
 272         struct bnx2x_softc *sc = dev->data->dev_private;
 273         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
 274
 275         /* First allocate the tx queue data structure */
 276         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
 277                           RTE_CACHE_LINE_SIZE);
 278         if (txq == NULL)
 279                 return (-ENOMEM);
 280         txq->sc = sc;
 281
 282         txq->nb_tx_pages = 1;
 283         while (USABLE_TX_BD(txq) < nb_desc)
 284                 txq->nb_tx_pages <<= 1;
 285
 286         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
 287         sc->tx_ring_size = TOTAL_TX_BD(txq);
 288
 289         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
 290                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
 291
 292         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 293                      "total_bd=%lu, tx_pages=%u",
 294                      queue_idx, nb_desc, txq->tx_free_thresh, USABLE_TX_BD(txq),
 295                      TOTAL_TX_BD(txq), txq->nb_tx_pages);
 296
 297         /* Allocate TX ring hardware descriptors */
 298         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 299         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 300         if (tz == NULL) {
 301                 bnx2x_tx_queue_release(txq);
 302                 return (-ENOMEM);
 303         }
 304         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->phys_addr;
 305         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 306         memset(txq->tx_ring, 0, tsize);
 307
 308         /* Allocate software ring */
 309         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 310         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 311                                    RTE_CACHE_LINE_SIZE);
 312         if (txq->sw_ring == NULL) {
 313                 bnx2x_tx_queue_release(txq);
 314                 return (-ENOMEM);
 315         }
 316
 317         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 318            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 319
 320         /* Link TX pages */
 321         for (i = 1; i <= txq->nb_tx_pages; i++) {
 322                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 323                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 324                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 325                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 326                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
 327         }
 328
 329         txq->queue_id = queue_idx;
 330         txq->port_id = dev->data->port_id;
 331         txq->tx_pkt_tail = 0;
 332         txq->tx_pkt_head = 0;
 333         txq->tx_bd_tail = 0;
 334         txq->tx_bd_head = 0;
 335         txq->nb_tx_avail = txq->nb_tx_desc;
 336         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 337         dev->data->tx_queues[queue_idx] = txq;
 338         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 339
 340         return 0;
 341 }
 342
 343 static inline void
 344 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 345                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 346 {
 347         union ustorm_eth_rx_producers rx_prods;
 348
 349         rx_prods.prod.bd_prod  = rx_bd_prod;
 350         rx_prods.prod.cqe_prod = rx_cq_prod;
 351
 352         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
 353 }
 354
 355 static uint16_t
 356 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 357 {
 358         struct bnx2x_rx_queue *rxq = p_rxq;
 359         struct bnx2x_softc *sc = rxq->sc;
 360         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 361         uint32_t nb_rx = 0;
 362         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 363         uint16_t bd_cons, bd_prod;
 364         struct rte_mbuf *new_mb;
 365         uint16_t rx_pref;
 366         struct eth_fast_path_rx_cqe *cqe_fp;
 367         uint16_t len, pad;
 368         struct rte_mbuf *rx_mb = NULL;
 369
 370         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 371         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 372                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 373                 ++hw_cq_cons;
 374         }
 375
 376         bd_cons = rxq->rx_bd_head;
 377         bd_prod = rxq->rx_bd_tail;
 378         sw_cq_cons = rxq->rx_cq_head;
 379         sw_cq_prod = rxq->rx_cq_tail;
 380
 381         if (sw_cq_cons == hw_cq_cons)
 382                 return 0;
 383
 384         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
 385
 386                 bd_prod &= MAX_RX_BD(rxq);
 387                 bd_cons &= MAX_RX_BD(rxq);
 388
 389                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
 390
 391                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
 392                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
 393                         break;
 394                 }
 395
 396                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
 397                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
 398                                         cqe_fp->type_error_flags, sw_cq_cons);
 399                         goto next_rx;
 400                 }
 401
 402                 len = cqe_fp->pkt_len_or_gro_seg_len;
 403                 pad = cqe_fp->placement_offset;
 404
 405                 new_mb = bnx2x_rxmbuf_alloc(rxq->mb_pool);
 406                 if (unlikely(!new_mb)) {
 407                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 408                         goto next_rx;
 409                 }
 410
 411                 rx_mb = rxq->sw_ring[bd_cons];
 412                 rxq->sw_ring[bd_cons] = new_mb;
 413                 rxq->rx_ring[bd_prod] = new_mb->buf_physaddr;
 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;
 423                 rx_mb->nb_segs = 1;
 424                 rx_mb->next = NULL;
 425                 rx_mb->pkt_len = rx_mb->data_len = len;
 426                 rx_mb->port = rxq->port_id;
 427                 rx_mb->buf_len = len + pad;
 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 |= PKT_RX_VLAN_PKT;
 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         return nb_rx;
 462 }
 463
 464 int
 465 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
 466 {
 467         dev->rx_pkt_burst = bnx2x_recv_pkts;
 468
 469         return 0;
 470 }
 471
 472 void
 473 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 474 {
 475         uint8_t i;
 476
 477         PMD_INIT_FUNC_TRACE();
 478
 479         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 480                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 481                 if (txq != NULL) {
 482                         bnx2x_tx_queue_release(txq);
 483                         dev->data->tx_queues[i] = NULL;
 484                 }
 485         }
 486
 487         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 488                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 489                 if (rxq != NULL) {
 490                         bnx2x_rx_queue_release(rxq);
 491                         dev->data->rx_queues[i] = NULL;
 492                 }
 493         }
 494 }