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->driver->pci_drv.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, 0, BNX2X_PAGE_SIZE);
  30 }
  31
  32 static void
  33 bnx2x_rx_queue_release(struct bnx2x_rx_queue *rx_queue)
  34 {
  35         uint16_t i;
  36         struct rte_mbuf **sw_ring;
  37
  38         if (NULL != rx_queue) {
  39
  40                 sw_ring = rx_queue->sw_ring;
  41                 if (NULL != sw_ring) {
  42                         for (i = 0; i < rx_queue->nb_rx_desc; i++) {
  43                                 if (NULL != sw_ring[i])
  44                                         rte_pktmbuf_free(sw_ring[i]);
  45                         }
  46                         rte_free(sw_ring);
  47                 }
  48                 rte_free(rx_queue);
  49         }
  50 }
  51
  52 void
  53 bnx2x_dev_rx_queue_release(void *rxq)
  54 {
  55         bnx2x_rx_queue_release(rxq);
  56 }
  57
  58 int
  59 bnx2x_dev_rx_queue_setup(struct rte_eth_dev *dev,
  60                        uint16_t queue_idx,
  61                        uint16_t nb_desc,
  62                        unsigned int socket_id,
  63                        const struct rte_eth_rxconf *rx_conf,
  64                        struct rte_mempool *mp)
  65 {
  66         uint16_t j, idx;
  67         const struct rte_memzone *dma;
  68         struct bnx2x_rx_queue *rxq;
  69         uint32_t dma_size;
  70         struct rte_mbuf *mbuf;
  71         struct bnx2x_softc *sc = dev->data->dev_private;
  72         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
  73         struct eth_rx_cqe_next_page *nextpg;
  74         phys_addr_t *rx_bd;
  75         phys_addr_t busaddr;
  76
  77         /* First allocate the rx queue data structure */
  78         rxq = rte_zmalloc_socket("ethdev RX queue", sizeof(struct bnx2x_rx_queue),
  79                                  RTE_CACHE_LINE_SIZE, socket_id);
  80         if (NULL == rxq) {
  81                 PMD_INIT_LOG(ERR, "rte_zmalloc for rxq failed!");
  82                 return -ENOMEM;
  83         }
  84         rxq->sc = sc;
  85         rxq->mb_pool = mp;
  86         rxq->queue_id = queue_idx;
  87         rxq->port_id = dev->data->port_id;
  88         rxq->crc_len = (uint8_t)((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 : ETHER_CRC_LEN);
  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         rxq->rx_free_thresh = rx_conf->rx_free_thresh ?
  99                 rx_conf->rx_free_thresh : DEFAULT_RX_FREE_THRESH;
 100
 101         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 102                        "total_bd=%lu, rx_pages=%u, cq_pages=%u",
 103                        queue_idx, nb_desc, rxq->rx_free_thresh,
 104                        (unsigned long)USABLE_RX_BD(rxq),
 105                        (unsigned long)TOTAL_RX_BD(rxq), rxq->nb_rx_pages,
 106                        rxq->nb_cq_pages);
 107
 108         /* Allocate RX ring hardware descriptors */
 109         dma_size = rxq->nb_rx_desc * sizeof(struct eth_rx_bd);
 110         dma = ring_dma_zone_reserve(dev, "hw_ring", queue_idx, dma_size, socket_id);
 111         if (NULL == dma) {
 112                 PMD_RX_LOG(ERR, "ring_dma_zone_reserve for rx_ring failed!");
 113                 bnx2x_rx_queue_release(rxq);
 114                 return -ENOMEM;
 115         }
 116         fp->rx_desc_mapping = rxq->rx_ring_phys_addr = (uint64_t)dma->phys_addr;
 117         rxq->rx_ring = (uint64_t*)dma->addr;
 118         memset((void *)rxq->rx_ring, 0, dma_size);
 119
 120         /* Link the RX chain pages. */
 121         for (j = 1; j <= rxq->nb_rx_pages; j++) {
 122                 rx_bd = &rxq->rx_ring[TOTAL_RX_BD_PER_PAGE * j - 2];
 123                 busaddr = rxq->rx_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_rx_pages);
 124                 *rx_bd = busaddr;
 125         }
 126
 127         /* Allocate software ring */
 128         dma_size = rxq->nb_rx_desc * sizeof(struct bnx2x_rx_entry);
 129         rxq->sw_ring = rte_zmalloc_socket("sw_ring", dma_size,
 130                                           RTE_CACHE_LINE_SIZE,
 131                                           socket_id);
 132         if (NULL == rxq->sw_ring) {
 133                 PMD_RX_LOG(ERR, "rte_zmalloc for sw_ring failed!");
 134                 bnx2x_rx_queue_release(rxq);
 135                 return -ENOMEM;
 136         }
 137
 138         /* Initialize software ring entries */
 139         rxq->rx_mbuf_alloc = 0;
 140         for (idx = 0; idx < rxq->nb_rx_desc; idx = NEXT_RX_BD(idx)) {
 141                 mbuf = rte_mbuf_raw_alloc(mp);
 142                 if (NULL == mbuf) {
 143                         PMD_RX_LOG(ERR, "RX mbuf alloc failed queue_id=%u, idx=%d",
 144                                    (unsigned)rxq->queue_id, idx);
 145                         bnx2x_rx_queue_release(rxq);
 146                         return -ENOMEM;
 147                 }
 148                 rxq->sw_ring[idx] = mbuf;
 149                 rxq->rx_ring[idx] = mbuf->buf_physaddr;
 150                 rxq->rx_mbuf_alloc++;
 151         }
 152         rxq->pkt_first_seg = NULL;
 153         rxq->pkt_last_seg = NULL;
 154         rxq->rx_bd_head = 0;
 155         rxq->rx_bd_tail = rxq->nb_rx_desc;
 156
 157         /* Allocate CQ chain. */
 158         dma_size = BNX2X_RX_CHAIN_PAGE_SZ * rxq->nb_cq_pages;
 159         dma = ring_dma_zone_reserve(dev, "bnx2x_rcq", queue_idx, dma_size, socket_id);
 160         if (NULL == dma) {
 161                 PMD_RX_LOG(ERR, "RCQ  alloc failed");
 162                 return -ENOMEM;
 163         }
 164         fp->rx_comp_mapping = rxq->cq_ring_phys_addr = (uint64_t)dma->phys_addr;
 165         rxq->cq_ring = (union eth_rx_cqe*)dma->addr;
 166
 167         /* Link the CQ chain pages. */
 168         for (j = 1; j <= rxq->nb_cq_pages; j++) {
 169                 nextpg = &rxq->cq_ring[TOTAL_RCQ_ENTRIES_PER_PAGE * j - 1].next_page_cqe;
 170                 busaddr = rxq->cq_ring_phys_addr + BNX2X_PAGE_SIZE * (j % rxq->nb_cq_pages);
 171                 nextpg->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 172                 nextpg->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 173         }
 174         rxq->rx_cq_head = 0;
 175         rxq->rx_cq_tail = TOTAL_RCQ_ENTRIES(rxq);
 176
 177         dev->data->rx_queues[queue_idx] = rxq;
 178         if (!sc->rx_queues) sc->rx_queues = dev->data->rx_queues;
 179
 180         return 0;
 181 }
 182
 183 static void
 184 bnx2x_tx_queue_release(struct bnx2x_tx_queue *tx_queue)
 185 {
 186         uint16_t i;
 187         struct rte_mbuf **sw_ring;
 188
 189         if (NULL != tx_queue) {
 190
 191                 sw_ring = tx_queue->sw_ring;
 192                 if (NULL != sw_ring) {
 193                         for (i = 0; i < tx_queue->nb_tx_desc; i++) {
 194                                 if (NULL != sw_ring[i])
 195                                         rte_pktmbuf_free(sw_ring[i]);
 196                         }
 197                         rte_free(sw_ring);
 198                 }
 199                 rte_free(tx_queue);
 200         }
 201 }
 202
 203 void
 204 bnx2x_dev_tx_queue_release(void *txq)
 205 {
 206         bnx2x_tx_queue_release(txq);
 207 }
 208
 209 static uint16_t
 210 bnx2x_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 211 {
 212         struct bnx2x_tx_queue *txq;
 213         struct bnx2x_softc *sc;
 214         struct bnx2x_fastpath *fp;
 215         uint16_t nb_tx_pkts;
 216         uint16_t nb_pkt_sent = 0;
 217         uint32_t ret;
 218
 219         txq = p_txq;
 220         sc = txq->sc;
 221         fp = &sc->fp[txq->queue_id];
 222
 223         if ((unlikely((txq->nb_tx_desc - txq->nb_tx_avail) >
 224                                 txq->tx_free_thresh)))
 225                 bnx2x_txeof(sc, fp);
 226
 227         nb_tx_pkts = RTE_MIN(nb_pkts, txq->nb_tx_avail / BDS_PER_TX_PKT);
 228         if (unlikely(nb_tx_pkts == 0))
 229                 return 0;
 230
 231         while (nb_tx_pkts--) {
 232                 struct rte_mbuf *m = *tx_pkts++;
 233                 assert(m != NULL);
 234                 ret = bnx2x_tx_encap(txq, m);
 235                 fp->tx_db.data.prod += ret;
 236                 nb_pkt_sent++;
 237         }
 238
 239         bnx2x_update_fp_sb_idx(fp);
 240         mb();
 241         DOORBELL(sc, txq->queue_id, fp->tx_db.raw);
 242         mb();
 243
 244         if ((txq->nb_tx_desc - txq->nb_tx_avail) >
 245                                 txq->tx_free_thresh)
 246                 bnx2x_txeof(sc, fp);
 247
 248         return nb_pkt_sent;
 249 }
 250
 251 int
 252 bnx2x_dev_tx_queue_setup(struct rte_eth_dev *dev,
 253                        uint16_t queue_idx,
 254                        uint16_t nb_desc,
 255                        unsigned int socket_id,
 256                        const struct rte_eth_txconf *tx_conf)
 257 {
 258         uint16_t i;
 259         unsigned int tsize;
 260         const struct rte_memzone *tz;
 261         struct bnx2x_tx_queue *txq;
 262         struct eth_tx_next_bd *tx_n_bd;
 263         uint64_t busaddr;
 264         struct bnx2x_softc *sc = dev->data->dev_private;
 265         struct bnx2x_fastpath *fp = &sc->fp[queue_idx];
 266
 267         /* First allocate the tx queue data structure */
 268         txq = rte_zmalloc("ethdev TX queue", sizeof(struct bnx2x_tx_queue),
 269                           RTE_CACHE_LINE_SIZE);
 270         if (txq == NULL)
 271                 return -ENOMEM;
 272         txq->sc = sc;
 273
 274         txq->nb_tx_pages = 1;
 275         while (USABLE_TX_BD(txq) < nb_desc)
 276                 txq->nb_tx_pages <<= 1;
 277
 278         txq->nb_tx_desc  = TOTAL_TX_BD(txq);
 279         sc->tx_ring_size = TOTAL_TX_BD(txq);
 280
 281         txq->tx_free_thresh = tx_conf->tx_free_thresh ?
 282                 tx_conf->tx_free_thresh : DEFAULT_TX_FREE_THRESH;
 283
 284         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 285                      "total_bd=%lu, tx_pages=%u",
 286                      queue_idx, nb_desc, txq->tx_free_thresh,
 287                      (unsigned long)USABLE_TX_BD(txq),
 288                      (unsigned long)TOTAL_TX_BD(txq), txq->nb_tx_pages);
 289
 290         /* Allocate TX ring hardware descriptors */
 291         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 292         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 293         if (tz == NULL) {
 294                 bnx2x_tx_queue_release(txq);
 295                 return -ENOMEM;
 296         }
 297         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->phys_addr;
 298         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 299         memset(txq->tx_ring, 0, tsize);
 300
 301         /* Allocate software ring */
 302         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 303         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 304                                    RTE_CACHE_LINE_SIZE);
 305         if (txq->sw_ring == NULL) {
 306                 bnx2x_tx_queue_release(txq);
 307                 return -ENOMEM;
 308         }
 309
 310         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 311            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 312
 313         /* Link TX pages */
 314         for (i = 1; i <= txq->nb_tx_pages; i++) {
 315                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 316                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 317                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 318                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 319                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
 320         }
 321
 322         txq->queue_id = queue_idx;
 323         txq->port_id = dev->data->port_id;
 324         txq->tx_pkt_tail = 0;
 325         txq->tx_pkt_head = 0;
 326         txq->tx_bd_tail = 0;
 327         txq->tx_bd_head = 0;
 328         txq->nb_tx_avail = txq->nb_tx_desc;
 329         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 330         dev->data->tx_queues[queue_idx] = txq;
 331         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 332
 333         return 0;
 334 }
 335
 336 static inline void
 337 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 338                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 339 {
 340         union ustorm_eth_rx_producers rx_prods;
 341
 342         rx_prods.prod.bd_prod  = rx_bd_prod;
 343         rx_prods.prod.cqe_prod = rx_cq_prod;
 344
 345         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
 346 }
 347
 348 static uint16_t
 349 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 350 {
 351         struct bnx2x_rx_queue *rxq = p_rxq;
 352         struct bnx2x_softc *sc = rxq->sc;
 353         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 354         uint32_t nb_rx = 0;
 355         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 356         uint16_t bd_cons, bd_prod;
 357         struct rte_mbuf *new_mb;
 358         uint16_t rx_pref;
 359         struct eth_fast_path_rx_cqe *cqe_fp;
 360         uint16_t len, pad;
 361         struct rte_mbuf *rx_mb = NULL;
 362
 363         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 364         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 365                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 366                 ++hw_cq_cons;
 367         }
 368
 369         bd_cons = rxq->rx_bd_head;
 370         bd_prod = rxq->rx_bd_tail;
 371         sw_cq_cons = rxq->rx_cq_head;
 372         sw_cq_prod = rxq->rx_cq_tail;
 373
 374         if (sw_cq_cons == hw_cq_cons)
 375                 return 0;
 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 = rte_mbuf_raw_alloc(rxq->mb_pool);
 399                 if (unlikely(!new_mb)) {
 400                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 401                         rte_eth_devices[rxq->port_id].data->
 402                                         rx_mbuf_alloc_failed++;
 403                         goto next_rx;
 404                 }
 405
 406                 rx_mb = rxq->sw_ring[bd_cons];
 407                 rxq->sw_ring[bd_cons] = new_mb;
 408                 rxq->rx_ring[bd_prod] = new_mb->buf_physaddr;
 409
 410                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
 411                 rte_prefetch0(rxq->sw_ring[rx_pref]);
 412                 if ((rx_pref & 0x3) == 0) {
 413                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
 414                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
 415                 }
 416
 417                 rx_mb->data_off = pad;
 418                 rx_mb->nb_segs = 1;
 419                 rx_mb->next = NULL;
 420                 rx_mb->pkt_len = rx_mb->data_len = len;
 421                 rx_mb->port = rxq->port_id;
 422                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
 423
 424                 /*
 425                  * If we received a packet with a vlan tag,
 426                  * attach that information to the packet.
 427                  */
 428                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
 429                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
 430                         rx_mb->ol_flags |= PKT_RX_VLAN_PKT;
 431                 }
 432
 433                 rx_pkts[nb_rx] = rx_mb;
 434                 nb_rx++;
 435
 436                 /* limit spinning on the queue */
 437                 if (unlikely(nb_rx == sc->rx_budget)) {
 438                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
 439                         break;
 440                 }
 441
 442 next_rx:
 443                 bd_cons    = NEXT_RX_BD(bd_cons);
 444                 bd_prod    = NEXT_RX_BD(bd_prod);
 445                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
 446                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
 447         }
 448         rxq->rx_bd_head = bd_cons;
 449         rxq->rx_bd_tail = bd_prod;
 450         rxq->rx_cq_head = sw_cq_cons;
 451         rxq->rx_cq_tail = sw_cq_prod;
 452
 453         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
 454
 455         return nb_rx;
 456 }
 457
 458 int
 459 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
 460 {
 461         dev->rx_pkt_burst = bnx2x_recv_pkts;
 462
 463         return 0;
 464 }
 465
 466 void
 467 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 468 {
 469         uint8_t i;
 470
 471         PMD_INIT_FUNC_TRACE();
 472
 473         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 474                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 475                 if (txq != NULL) {
 476                         bnx2x_tx_queue_release(txq);
 477                         dev->data->tx_queues[i] = NULL;
 478                 }
 479         }
 480
 481         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 482                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 483                 if (rxq != NULL) {
 484                         bnx2x_rx_queue_release(rxq);
 485                         dev->data->rx_queues[i] = NULL;
 486                 }
 487         }
 488 }