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_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
  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_INIT_LOG(DEBUG, "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
 277         PMD_INIT_LOG(DEBUG, "fp[%02d] req_bd=%u, thresh=%u, usable_bd=%lu, "
 278                      "total_bd=%lu, tx_pages=%u",
 279                      queue_idx, nb_desc, txq->tx_free_thresh,
 280                      (unsigned long)USABLE_TX_BD(txq),
 281                      (unsigned long)TOTAL_TX_BD(txq), txq->nb_tx_pages);
 282
 283         /* Allocate TX ring hardware descriptors */
 284         tsize = txq->nb_tx_desc * sizeof(union eth_tx_bd_types);
 285         tz = ring_dma_zone_reserve(dev, "tx_hw_ring", queue_idx, tsize, socket_id);
 286         if (tz == NULL) {
 287                 bnx2x_tx_queue_release(txq);
 288                 return -ENOMEM;
 289         }
 290         fp->tx_desc_mapping = txq->tx_ring_phys_addr = (uint64_t)tz->phys_addr;
 291         txq->tx_ring = (union eth_tx_bd_types *) tz->addr;
 292         memset(txq->tx_ring, 0, tsize);
 293
 294         /* Allocate software ring */
 295         tsize = txq->nb_tx_desc * sizeof(struct rte_mbuf *);
 296         txq->sw_ring = rte_zmalloc("tx_sw_ring", tsize,
 297                                    RTE_CACHE_LINE_SIZE);
 298         if (txq->sw_ring == NULL) {
 299                 bnx2x_tx_queue_release(txq);
 300                 return -ENOMEM;
 301         }
 302
 303         /* PMD_DRV_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
 304            txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr); */
 305
 306         /* Link TX pages */
 307         for (i = 1; i <= txq->nb_tx_pages; i++) {
 308                 tx_n_bd = &txq->tx_ring[TOTAL_TX_BD_PER_PAGE * i - 1].next_bd;
 309                 busaddr = txq->tx_ring_phys_addr + BNX2X_PAGE_SIZE * (i % txq->nb_tx_pages);
 310                 tx_n_bd->addr_hi = rte_cpu_to_le_32(U64_HI(busaddr));
 311                 tx_n_bd->addr_lo = rte_cpu_to_le_32(U64_LO(busaddr));
 312                 /* PMD_DRV_LOG(DEBUG, "link tx page %lu", (TOTAL_TX_BD_PER_PAGE * i - 1)); */
 313         }
 314
 315         txq->queue_id = queue_idx;
 316         txq->port_id = dev->data->port_id;
 317         txq->tx_pkt_tail = 0;
 318         txq->tx_pkt_head = 0;
 319         txq->tx_bd_tail = 0;
 320         txq->tx_bd_head = 0;
 321         txq->nb_tx_avail = txq->nb_tx_desc;
 322         dev->tx_pkt_burst = bnx2x_xmit_pkts;
 323         dev->data->tx_queues[queue_idx] = txq;
 324         if (!sc->tx_queues) sc->tx_queues = dev->data->tx_queues;
 325
 326         return 0;
 327 }
 328
 329 static inline void
 330 bnx2x_upd_rx_prod_fast(struct bnx2x_softc *sc, struct bnx2x_fastpath *fp,
 331                 uint16_t rx_bd_prod, uint16_t rx_cq_prod)
 332 {
 333         union ustorm_eth_rx_producers rx_prods;
 334
 335         rx_prods.prod.bd_prod  = rx_bd_prod;
 336         rx_prods.prod.cqe_prod = rx_cq_prod;
 337
 338         REG_WR(sc, fp->ustorm_rx_prods_offset, rx_prods.raw_data[0]);
 339 }
 340
 341 static uint16_t
 342 bnx2x_recv_pkts(void *p_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 343 {
 344         struct bnx2x_rx_queue *rxq = p_rxq;
 345         struct bnx2x_softc *sc = rxq->sc;
 346         struct bnx2x_fastpath *fp = &sc->fp[rxq->queue_id];
 347         uint32_t nb_rx = 0;
 348         uint16_t hw_cq_cons, sw_cq_cons, sw_cq_prod;
 349         uint16_t bd_cons, bd_prod;
 350         struct rte_mbuf *new_mb;
 351         uint16_t rx_pref;
 352         struct eth_fast_path_rx_cqe *cqe_fp;
 353         uint16_t len, pad;
 354         struct rte_mbuf *rx_mb = NULL;
 355
 356         hw_cq_cons = le16toh(*fp->rx_cq_cons_sb);
 357         if ((hw_cq_cons & USABLE_RCQ_ENTRIES_PER_PAGE) ==
 358                         USABLE_RCQ_ENTRIES_PER_PAGE) {
 359                 ++hw_cq_cons;
 360         }
 361
 362         bd_cons = rxq->rx_bd_head;
 363         bd_prod = rxq->rx_bd_tail;
 364         sw_cq_cons = rxq->rx_cq_head;
 365         sw_cq_prod = rxq->rx_cq_tail;
 366
 367         if (sw_cq_cons == hw_cq_cons)
 368                 return 0;
 369
 370         while (nb_rx < nb_pkts && sw_cq_cons != hw_cq_cons) {
 371
 372                 bd_prod &= MAX_RX_BD(rxq);
 373                 bd_cons &= MAX_RX_BD(rxq);
 374
 375                 cqe_fp = &rxq->cq_ring[sw_cq_cons & MAX_RX_BD(rxq)].fast_path_cqe;
 376
 377                 if (unlikely(CQE_TYPE_SLOW(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_TYPE))) {
 378                         PMD_RX_LOG(ERR, "slowpath event during traffic processing");
 379                         break;
 380                 }
 381
 382                 if (unlikely(cqe_fp->type_error_flags & ETH_FAST_PATH_RX_CQE_PHY_DECODE_ERR_FLG)) {
 383                         PMD_RX_LOG(ERR, "flags 0x%x rx packet %u",
 384                                         cqe_fp->type_error_flags, sw_cq_cons);
 385                         goto next_rx;
 386                 }
 387
 388                 len = cqe_fp->pkt_len_or_gro_seg_len;
 389                 pad = cqe_fp->placement_offset;
 390
 391                 new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
 392                 if (unlikely(!new_mb)) {
 393                         PMD_RX_LOG(ERR, "mbuf alloc fail fp[%02d]", fp->index);
 394                         rte_eth_devices[rxq->port_id].data->
 395                                         rx_mbuf_alloc_failed++;
 396                         goto next_rx;
 397                 }
 398
 399                 rx_mb = rxq->sw_ring[bd_cons];
 400                 rxq->sw_ring[bd_cons] = new_mb;
 401                 rxq->rx_ring[bd_prod] = new_mb->buf_physaddr;
 402
 403                 rx_pref = NEXT_RX_BD(bd_cons) & MAX_RX_BD(rxq);
 404                 rte_prefetch0(rxq->sw_ring[rx_pref]);
 405                 if ((rx_pref & 0x3) == 0) {
 406                         rte_prefetch0(&rxq->rx_ring[rx_pref]);
 407                         rte_prefetch0(&rxq->sw_ring[rx_pref]);
 408                 }
 409
 410                 rx_mb->data_off = pad;
 411                 rx_mb->nb_segs = 1;
 412                 rx_mb->next = NULL;
 413                 rx_mb->pkt_len = rx_mb->data_len = len;
 414                 rx_mb->port = rxq->port_id;
 415                 rte_prefetch1(rte_pktmbuf_mtod(rx_mb, void *));
 416
 417                 /*
 418                  * If we received a packet with a vlan tag,
 419                  * attach that information to the packet.
 420                  */
 421                 if (cqe_fp->pars_flags.flags & PARSING_FLAGS_VLAN) {
 422                         rx_mb->vlan_tci = cqe_fp->vlan_tag;
 423                         rx_mb->ol_flags |= PKT_RX_VLAN_PKT;
 424                 }
 425
 426                 rx_pkts[nb_rx] = rx_mb;
 427                 nb_rx++;
 428
 429                 /* limit spinning on the queue */
 430                 if (unlikely(nb_rx == sc->rx_budget)) {
 431                         PMD_RX_LOG(ERR, "Limit spinning on the queue");
 432                         break;
 433                 }
 434
 435 next_rx:
 436                 bd_cons    = NEXT_RX_BD(bd_cons);
 437                 bd_prod    = NEXT_RX_BD(bd_prod);
 438                 sw_cq_prod = NEXT_RCQ_IDX(sw_cq_prod);
 439                 sw_cq_cons = NEXT_RCQ_IDX(sw_cq_cons);
 440         }
 441         rxq->rx_bd_head = bd_cons;
 442         rxq->rx_bd_tail = bd_prod;
 443         rxq->rx_cq_head = sw_cq_cons;
 444         rxq->rx_cq_tail = sw_cq_prod;
 445
 446         bnx2x_upd_rx_prod_fast(sc, fp, bd_prod, sw_cq_prod);
 447
 448         return nb_rx;
 449 }
 450
 451 int
 452 bnx2x_dev_rx_init(struct rte_eth_dev *dev)
 453 {
 454         dev->rx_pkt_burst = bnx2x_recv_pkts;
 455
 456         return 0;
 457 }
 458
 459 void
 460 bnx2x_dev_clear_queues(struct rte_eth_dev *dev)
 461 {
 462         uint8_t i;
 463
 464         PMD_INIT_FUNC_TRACE();
 465
 466         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 467                 struct bnx2x_tx_queue *txq = dev->data->tx_queues[i];
 468                 if (txq != NULL) {
 469                         bnx2x_tx_queue_release(txq);
 470                         dev->data->tx_queues[i] = NULL;
 471                 }
 472         }
 473
 474         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 475                 struct bnx2x_rx_queue *rxq = dev->data->rx_queues[i];
 476                 if (rxq != NULL) {
 477                         bnx2x_rx_queue_release(rxq);
 478                         dev->data->rx_queues[i] = NULL;
 479                 }
 480         }
 481 }