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