LXR dpdk/drivers/net/bnxt/bnxt

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright(c) 2014-2021 Broadcom
   3 * All rights reserved.
   4 */
   5
   6#include <inttypes.h>
   7
   8#include <rte_byteorder.h>
   9#include <rte_malloc.h>
  10
  11#include "bnxt.h"
  12#include "bnxt_hwrm.h"
  13#include "bnxt_ring.h"
  14#include "bnxt_txq.h"
  15#include "bnxt_txr.h"
  16#include "hsi_struct_def_dpdk.h"
  17#include <stdbool.h>
  18
  19/*
  20 * TX Ring handling
  21 */
  22
  23void bnxt_free_tx_rings(struct bnxt *bp)
  24{
  25        int i;
  26
  27        for (i = 0; i < (int)bp->tx_nr_rings; i++) {
  28                struct bnxt_tx_queue *txq = bp->tx_queues[i];
  29
  30                if (!txq)
  31                        continue;
  32
  33                bnxt_free_ring(txq->tx_ring->tx_ring_struct);
  34                rte_free(txq->tx_ring->tx_ring_struct);
  35                rte_free(txq->tx_ring);
  36
  37                bnxt_free_ring(txq->cp_ring->cp_ring_struct);
  38                rte_free(txq->cp_ring->cp_ring_struct);
  39                rte_free(txq->cp_ring);
  40
  41                rte_free(txq);
  42                bp->tx_queues[i] = NULL;
  43        }
  44}
  45
  46int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
  47{
  48        struct bnxt_tx_ring_info *txr = txq->tx_ring;
  49        struct bnxt_ring *ring = txr->tx_ring_struct;
  50
  51        txq->tx_wake_thresh = ring->ring_size / 2;
  52        ring->fw_ring_id = INVALID_HW_RING_ID;
  53
  54        return 0;
  55}
  56
  57int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
  58{
  59        struct bnxt_cp_ring_info *cpr;
  60        struct bnxt_tx_ring_info *txr;
  61        struct bnxt_ring *ring;
  62
  63        txr = rte_zmalloc_socket("bnxt_tx_ring",
  64                                 sizeof(struct bnxt_tx_ring_info),
  65                                 RTE_CACHE_LINE_SIZE, socket_id);
  66        if (txr == NULL)
  67                return -ENOMEM;
  68        txq->tx_ring = txr;
  69
  70        ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
  71                                  sizeof(struct bnxt_ring),
  72                                  RTE_CACHE_LINE_SIZE, socket_id);
  73        if (ring == NULL)
  74                return -ENOMEM;
  75        txr->tx_ring_struct = ring;
  76        ring->ring_size = rte_align32pow2(txq->nb_tx_desc);
  77        ring->ring_mask = ring->ring_size - 1;
  78        ring->bd = (void *)txr->tx_desc_ring;
  79        ring->bd_dma = txr->tx_desc_mapping;
  80        ring->vmem_size = ring->ring_size * sizeof(struct rte_mbuf *);
  81        ring->vmem = (void **)&txr->tx_buf_ring;
  82        ring->fw_ring_id = INVALID_HW_RING_ID;
  83
  84        cpr = rte_zmalloc_socket("bnxt_tx_ring",
  85                                 sizeof(struct bnxt_cp_ring_info),
  86                                 RTE_CACHE_LINE_SIZE, socket_id);
  87        if (cpr == NULL)
  88                return -ENOMEM;
  89        txq->cp_ring = cpr;
  90
  91        ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
  92                                  sizeof(struct bnxt_ring),
  93                                  RTE_CACHE_LINE_SIZE, socket_id);
  94        if (ring == NULL)
  95                return -ENOMEM;
  96        cpr->cp_ring_struct = ring;
  97        ring->ring_size = txr->tx_ring_struct->ring_size;
  98        ring->ring_mask = ring->ring_size - 1;
  99        ring->bd = (void *)cpr->cp_desc_ring;
 100        ring->bd_dma = cpr->cp_desc_mapping;
 101        ring->vmem_size = 0;
 102        ring->vmem = NULL;
 103        ring->fw_ring_id = INVALID_HW_RING_ID;
 104
 105        return 0;
 106}
 107
 108static bool
 109bnxt_xmit_need_long_bd(struct rte_mbuf *tx_pkt, struct bnxt_tx_queue *txq)
 110{
 111        if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
 112                                PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
 113                                PKT_TX_VLAN_PKT | PKT_TX_OUTER_IP_CKSUM |
 114                                PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN |
 115                                PKT_TX_TUNNEL_GENEVE | PKT_TX_IEEE1588_TMST |
 116                                PKT_TX_QINQ_PKT) ||
 117             (BNXT_TRUFLOW_EN(txq->bp) &&
 118              (txq->bp->tx_cfa_action || txq->vfr_tx_cfa_action)))
 119                return true;
 120        return false;
 121}
 122
 123static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
 124                                struct bnxt_tx_queue *txq,
 125                                uint16_t *coal_pkts,
 126                                struct tx_bd_long **last_txbd)
 127{
 128        struct bnxt_tx_ring_info *txr = txq->tx_ring;
 129        struct bnxt_ring *ring = txr->tx_ring_struct;
 130        uint32_t outer_tpid_bd = 0;
 131        struct tx_bd_long *txbd;
 132        struct tx_bd_long_hi *txbd1 = NULL;
 133        uint32_t vlan_tag_flags;
 134        bool long_bd = false;
 135        unsigned short nr_bds;
 136        uint16_t prod;
 137        struct rte_mbuf *m_seg;
 138        struct rte_mbuf **tx_buf;
 139        static const uint32_t lhint_arr[4] = {
 140                TX_BD_LONG_FLAGS_LHINT_LT512,
 141                TX_BD_LONG_FLAGS_LHINT_LT1K,
 142                TX_BD_LONG_FLAGS_LHINT_LT2K,
 143                TX_BD_LONG_FLAGS_LHINT_LT2K
 144        };
 145
 146        if (unlikely(is_bnxt_in_error(txq->bp)))
 147                return -EIO;
 148
 149        long_bd = bnxt_xmit_need_long_bd(tx_pkt, txq);
 150        nr_bds = long_bd + tx_pkt->nb_segs;
 151
 152        if (unlikely(bnxt_tx_avail(txq) < nr_bds))
 153                return -ENOMEM;
 154
 155        /* Check if number of Tx descriptors is above HW limit */
 156        if (unlikely(nr_bds > BNXT_MAX_TSO_SEGS)) {
 157                PMD_DRV_LOG(ERR,
 158                            "Num descriptors %d exceeds HW limit\n", nr_bds);
 159                return -ENOSPC;
 160        }
 161
 162        /* If packet length is less than minimum packet size, pad it */
 163        if (unlikely(rte_pktmbuf_pkt_len(tx_pkt) < BNXT_MIN_PKT_SIZE)) {
 164                uint8_t pad = BNXT_MIN_PKT_SIZE - rte_pktmbuf_pkt_len(tx_pkt);
 165                char *seg = rte_pktmbuf_append(tx_pkt, pad);
 166
 167                if (!seg) {
 168                        PMD_DRV_LOG(ERR,
 169                                    "Failed to pad mbuf by %d bytes\n",
 170                                    pad);
 171                        return -ENOMEM;
 172                }
 173
 174                /* Note: data_len, pkt len are updated in rte_pktmbuf_append */
 175                memset(seg, 0, pad);
 176        }
 177
 178        /* Check non zero data_len */
 179        RTE_VERIFY(tx_pkt->data_len);
 180
 181        prod = RING_IDX(ring, txr->tx_raw_prod);
 182        tx_buf = &txr->tx_buf_ring[prod];
 183        *tx_buf = tx_pkt;
 184
 185        txbd = &txr->tx_desc_ring[prod];
 186        txbd->opaque = *coal_pkts;
 187        txbd->flags_type = nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
 188        txbd->flags_type |= TX_BD_SHORT_FLAGS_COAL_NOW;
 189        txbd->flags_type |= TX_BD_LONG_FLAGS_NO_CMPL;
 190        txbd->len = tx_pkt->data_len;
 191        if (tx_pkt->pkt_len >= 2048)
 192                txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
 193        else
 194                txbd->flags_type |= lhint_arr[tx_pkt->pkt_len >> 9];
 195        txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(tx_pkt));
 196        *last_txbd = txbd;
 197
 198        if (long_bd) {
 199                txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
 200                vlan_tag_flags = 0;
 201
 202                /* HW can accelerate only outer vlan in QinQ mode */
 203                if (tx_pkt->ol_flags & PKT_TX_QINQ_PKT) {
 204                        vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
 205                                tx_pkt->vlan_tci_outer;
 206                        outer_tpid_bd = txq->bp->outer_tpid_bd &
 207                                BNXT_OUTER_TPID_BD_MASK;
 208                        vlan_tag_flags |= outer_tpid_bd;
 209                } else if (tx_pkt->ol_flags & PKT_TX_VLAN_PKT) {
 210                        /* shurd: Should this mask at
 211                         * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
 212                         */
 213                        vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
 214                                tx_pkt->vlan_tci;
 215                        /* Currently supports 8021Q, 8021AD vlan offloads
 216                         * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
 217                         */
 218                        /* DPDK only supports 802.11q VLAN packets */
 219                        vlan_tag_flags |=
 220                                        TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
 221                }
 222
 223                txr->tx_raw_prod = RING_NEXT(txr->tx_raw_prod);
 224
 225                prod = RING_IDX(ring, txr->tx_raw_prod);
 226                txbd1 = (struct tx_bd_long_hi *)&txr->tx_desc_ring[prod];
 227                txbd1->lflags = 0;
 228                txbd1->cfa_meta = vlan_tag_flags;
 229                /* Legacy tx_bd_long_hi->mss =
 230                 * tx_bd_long_hi->kid_or_ts_high_mss
 231                 */
 232                txbd1->kid_or_ts_high_mss = 0;
 233
 234                if (txq->vfr_tx_cfa_action)
 235                        txbd1->cfa_action = txq->vfr_tx_cfa_action;
 236                else
 237                        txbd1->cfa_action = txq->bp->tx_cfa_action;
 238
 239                if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
 240                        uint16_t hdr_size;
 241
 242                        /* TSO */
 243                        txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO |
 244                                         TX_BD_LONG_LFLAGS_T_IPID;
 245                        hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
 246                                        tx_pkt->l4_len;
 247                        hdr_size += (tx_pkt->ol_flags & PKT_TX_TUNNEL_MASK) ?
 248                                    tx_pkt->outer_l2_len +
 249                                    tx_pkt->outer_l3_len : 0;
 250                        /* The hdr_size is multiple of 16bit units not 8bit.
 251                         * Hence divide by 2.
 252                         * Also legacy hdr_size = kid_or_ts_low_hdr_size.
 253                         */
 254                        txbd1->kid_or_ts_low_hdr_size = hdr_size >> 1;
 255                        txbd1->kid_or_ts_high_mss = tx_pkt->tso_segsz;
 256                        RTE_VERIFY(txbd1->kid_or_ts_high_mss);
 257
 258                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) ==
 259                           PKT_TX_OIP_IIP_TCP_UDP_CKSUM) {
 260                        /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 261                        txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 262                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_CKSUM) ==
 263                           PKT_TX_OIP_IIP_TCP_CKSUM) {
 264                        /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 265                        txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 266                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_UDP_CKSUM) ==
 267                           PKT_TX_OIP_IIP_UDP_CKSUM) {
 268                        /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 269                        txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 270                } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) ==
 271                           PKT_TX_IIP_TCP_UDP_CKSUM) {
 272                        /* (Inner) IP, (Inner) TCP/UDP CSO */
 273                        txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 274                } else if ((tx_pkt->ol_flags & PKT_TX_IIP_UDP_CKSUM) ==
 275                           PKT_TX_IIP_UDP_CKSUM) {
 276                        /* (Inner) IP, (Inner) TCP/UDP CSO */
 277                        txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 278                } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_CKSUM) ==
 279                           PKT_TX_IIP_TCP_CKSUM) {
 280                        /* (Inner) IP, (Inner) TCP/UDP CSO */
 281                        txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 282                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) ==
 283                           PKT_TX_OIP_TCP_UDP_CKSUM) {
 284                        /* Outer IP, (Inner) TCP/UDP CSO */
 285                        txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 286                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_UDP_CKSUM) ==
 287                           PKT_TX_OIP_UDP_CKSUM) {
 288                        /* Outer IP, (Inner) TCP/UDP CSO */
 289                        txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 290                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_CKSUM) ==
 291                           PKT_TX_OIP_TCP_CKSUM) {
 292                        /* Outer IP, (Inner) TCP/UDP CSO */
 293                        txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 294                } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) ==
 295                           PKT_TX_OIP_IIP_CKSUM) {
 296                        /* Outer IP, Inner IP CSO */
 297                        txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM;
 298                } else if ((tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) ==
 299                           PKT_TX_TCP_UDP_CKSUM) {
 300                        /* TCP/UDP CSO */
 301                        txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 302                } else if ((tx_pkt->ol_flags & PKT_TX_TCP_CKSUM) ==
 303                           PKT_TX_TCP_CKSUM) {
 304                        /* TCP/UDP CSO */
 305                        txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 306                } else if ((tx_pkt->ol_flags & PKT_TX_UDP_CKSUM) ==
 307                           PKT_TX_UDP_CKSUM) {
 308                        /* TCP/UDP CSO */
 309                        txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 310                } else if ((tx_pkt->ol_flags & PKT_TX_IP_CKSUM) ==
 311                           PKT_TX_IP_CKSUM) {
 312                        /* IP CSO */
 313                        txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM;
 314                } else if ((tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) ==
 315                           PKT_TX_OUTER_IP_CKSUM) {
 316                        /* IP CSO */
 317                        txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM;
 318                } else if ((tx_pkt->ol_flags & PKT_TX_IEEE1588_TMST) ==
 319                           PKT_TX_IEEE1588_TMST) {
 320                        /* PTP */
 321                        txbd1->lflags |= TX_BD_LONG_LFLAGS_STAMP;
 322                }
 323        } else {
 324                txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
 325        }
 326
 327        m_seg = tx_pkt->next;
 328        while (m_seg) {
 329                /* Check non zero data_len */
 330                RTE_VERIFY(m_seg->data_len);
 331                txr->tx_raw_prod = RING_NEXT(txr->tx_raw_prod);
 332
 333                prod = RING_IDX(ring, txr->tx_raw_prod);
 334                tx_buf = &txr->tx_buf_ring[prod];
 335                *tx_buf = m_seg;
 336
 337                txbd = &txr->tx_desc_ring[prod];
 338                txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(m_seg));
 339                txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
 340                txbd->len = m_seg->data_len;
 341
 342                m_seg = m_seg->next;
 343        }
 344
 345        txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
 346
 347        txr->tx_raw_prod = RING_NEXT(txr->tx_raw_prod);
 348
 349        return 0;
 350}
 351
 352/*
 353 * Transmit completion function for use when DEV_TX_OFFLOAD_MBUF_FAST_FREE
 354 * is enabled.
 355 */
 356static void bnxt_tx_cmp_fast(struct bnxt_tx_queue *txq, int nr_pkts)
 357{
 358        struct bnxt_tx_ring_info *txr = txq->tx_ring;
 359        struct bnxt_ring *ring = txr->tx_ring_struct;
 360        struct rte_mbuf **free = txq->free;
 361        uint16_t raw_cons = txr->tx_raw_cons;
 362        unsigned int blk = 0;
 363        int i, j;
 364
 365        for (i = 0; i < nr_pkts; i++) {
 366                struct rte_mbuf **tx_buf;
 367                unsigned short nr_bds;
 368
 369                tx_buf = &txr->tx_buf_ring[RING_IDX(ring, raw_cons)];
 370                nr_bds = (*tx_buf)->nb_segs +
 371                         bnxt_xmit_need_long_bd(*tx_buf, txq);
 372                for (j = 0; j < nr_bds; j++) {
 373                        if (*tx_buf) {
 374                                /* Add mbuf to the bulk free array */
 375                                free[blk++] = *tx_buf;
 376                                *tx_buf = NULL;
 377                        }
 378                        raw_cons = RING_NEXT(raw_cons);
 379                        tx_buf = &txr->tx_buf_ring[RING_IDX(ring, raw_cons)];
 380                }
 381        }
 382        if (blk)
 383                rte_mempool_put_bulk(free[0]->pool, (void *)free, blk);
 384
 385        txr->tx_raw_cons = raw_cons;
 386}
 387
 388static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
 389{
 390        struct bnxt_tx_ring_info *txr = txq->tx_ring;
 391        struct bnxt_ring *ring = txr->tx_ring_struct;
 392        struct rte_mempool *pool = NULL;
 393        struct rte_mbuf **free = txq->free;
 394        uint16_t raw_cons = txr->tx_raw_cons;
 395        unsigned int blk = 0;
 396        int i, j;
 397
 398        for (i = 0; i < nr_pkts; i++) {
 399                struct rte_mbuf *mbuf;
 400                struct rte_mbuf **tx_buf;
 401                unsigned short nr_bds;
 402
 403                tx_buf = &txr->tx_buf_ring[RING_IDX(ring, raw_cons)];
 404                nr_bds = (*tx_buf)->nb_segs +
 405                         bnxt_xmit_need_long_bd(*tx_buf, txq);
 406                for (j = 0; j < nr_bds; j++) {
 407                        mbuf = *tx_buf;
 408                        *tx_buf = NULL;
 409                        raw_cons = RING_NEXT(raw_cons);
 410                        tx_buf = &txr->tx_buf_ring[RING_IDX(ring, raw_cons)];
 411                        if (!mbuf)      /* long_bd's tx_buf ? */
 412                                continue;
 413
 414                        mbuf = rte_pktmbuf_prefree_seg(mbuf);
 415                        if (unlikely(!mbuf))
 416                                continue;
 417
 418                        /* EW - no need to unmap DMA memory? */
 419
 420                        if (likely(mbuf->pool == pool)) {
 421                                /* Add mbuf to the bulk free array */
 422                                free[blk++] = mbuf;
 423                        } else {
 424                                /* Found an mbuf from a different pool. Free
 425                                 * mbufs accumulated so far to the previous
 426                                 * pool
 427                                 */
 428                                if (likely(pool != NULL))
 429                                        rte_mempool_put_bulk(pool,
 430                                                             (void *)free,
 431                                                             blk);
 432
 433                                /* Start accumulating mbufs in a new pool */
 434                                free[0] = mbuf;
 435                                pool = mbuf->pool;
 436                                blk = 1;
 437                        }
 438                }
 439        }
 440        if (blk)
 441                rte_mempool_put_bulk(pool, (void *)free, blk);
 442
 443        txr->tx_raw_cons = raw_cons;
 444}
 445
 446static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
 447{
 448        uint32_t nb_tx_pkts = 0, cons, ring_mask, opaque;
 449        struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 450        uint32_t raw_cons = cpr->cp_raw_cons;
 451        struct bnxt_ring *cp_ring_struct;
 452        struct tx_cmpl *txcmp;
 453
 454        if (bnxt_tx_bds_in_hw(txq) < txq->tx_free_thresh)
 455                return 0;
 456
 457        cp_ring_struct = cpr->cp_ring_struct;
 458        ring_mask = cp_ring_struct->ring_mask;
 459
 460        do {
 461                cons = RING_CMPL(ring_mask, raw_cons);
 462                txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
 463
 464                if (!bnxt_cpr_cmp_valid(txcmp, raw_cons, ring_mask + 1))
 465                        break;
 466
 467                opaque = rte_le_to_cpu_32(txcmp->opaque);
 468
 469                if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
 470                        nb_tx_pkts += opaque;
 471                else
 472                        RTE_LOG_DP(ERR, PMD,
 473                                        "Unhandled CMP type %02x\n",
 474                                        CMP_TYPE(txcmp));
 475                raw_cons = NEXT_RAW_CMP(raw_cons);
 476        } while (nb_tx_pkts < ring_mask);
 477
 478        if (nb_tx_pkts) {
 479                if (txq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 480                        bnxt_tx_cmp_fast(txq, nb_tx_pkts);
 481                else
 482                        bnxt_tx_cmp(txq, nb_tx_pkts);
 483                cpr->cp_raw_cons = raw_cons;
 484                bnxt_db_cq(cpr);
 485        }
 486
 487        return nb_tx_pkts;
 488}
 489
 490uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 491                               uint16_t nb_pkts)
 492{
 493        int rc;
 494        uint16_t nb_tx_pkts = 0;
 495        uint16_t coal_pkts = 0;
 496        struct bnxt_tx_queue *txq = tx_queue;
 497        struct tx_bd_long *last_txbd = NULL;
 498
 499        /* Handle TX completions */
 500        bnxt_handle_tx_cp(txq);
 501
 502        /* Tx queue was stopped; wait for it to be restarted */
 503        if (unlikely(!txq->tx_started)) {
 504                PMD_DRV_LOG(DEBUG, "Tx q stopped;return\n");
 505                return 0;
 506        }
 507
 508        /* Handle TX burst request */
 509        for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
 510                coal_pkts++;
 511                rc = bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq,
 512                                     &coal_pkts, &last_txbd);
 513
 514                if (unlikely(rc))
 515                        break;
 516        }
 517
 518        if (likely(nb_tx_pkts)) {
 519                /* Request a completion on the last packet */
 520                last_txbd->flags_type &= ~TX_BD_LONG_FLAGS_NO_CMPL;
 521                bnxt_db_write(&txq->tx_ring->tx_db, txq->tx_ring->tx_raw_prod);
 522        }
 523
 524        return nb_tx_pkts;
 525}
 526
 527/*
 528 * Dummy DPDK callback for TX.
 529 *
 530 * This function is used to temporarily replace the real callback during
 531 * unsafe control operations on the queue, or in case of error.
 532 */
 533uint16_t
 534bnxt_dummy_xmit_pkts(void *tx_queue __rte_unused,
 535                     struct rte_mbuf **tx_pkts __rte_unused,
 536                     uint16_t nb_pkts __rte_unused)
 537{
 538        return 0;
 539}
 540
 541int bnxt_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 542{
 543        struct bnxt *bp = dev->data->dev_private;
 544        struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
 545        int rc = 0;
 546
 547        rc = is_bnxt_in_error(bp);
 548        if (rc)
 549                return rc;
 550
 551        bnxt_free_hwrm_tx_ring(bp, tx_queue_id);
 552        rc = bnxt_alloc_hwrm_tx_ring(bp, tx_queue_id);
 553        if (rc)
 554                return rc;
 555
 556        dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 557        txq->tx_started = true;
 558        PMD_DRV_LOG(DEBUG, "Tx queue started\n");
 559
 560        return 0;
 561}
 562
 563int bnxt_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 564{
 565        struct bnxt *bp = dev->data->dev_private;
 566        struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
 567        int rc = 0;
 568
 569        rc = is_bnxt_in_error(bp);
 570        if (rc)
 571                return rc;
 572
 573        /* Handle TX completions */
 574        bnxt_handle_tx_cp(txq);
 575
 576        dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 577        txq->tx_started = false;
 578        PMD_DRV_LOG(DEBUG, "Tx queue stopped\n");
 579
 580        return 0;
 581}
 582
 583/* Sweep the Tx completion queue till HWRM_DONE for ring flush is received.
 584 * The mbufs will not be freed in this call.
 585 * They will be freed during ring free as a part of mem cleanup.
 586 */
 587int bnxt_flush_tx_cmp(struct bnxt_cp_ring_info *cpr)
 588{
 589        uint32_t raw_cons = cpr->cp_raw_cons;
 590        uint32_t cons;
 591        uint32_t nb_tx_pkts = 0;
 592        struct tx_cmpl *txcmp;
 593        struct cmpl_base *cp_desc_ring = cpr->cp_desc_ring;
 594        struct bnxt_ring *cp_ring_struct = cpr->cp_ring_struct;
 595        uint32_t ring_mask = cp_ring_struct->ring_mask;
 596        uint32_t opaque = 0;
 597
 598        do {
 599                cons = RING_CMPL(ring_mask, raw_cons);
 600                txcmp = (struct tx_cmpl *)&cp_desc_ring[cons];
 601
 602                opaque = rte_cpu_to_le_32(txcmp->opaque);
 603                raw_cons = NEXT_RAW_CMP(raw_cons);
 604
 605                if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
 606                        nb_tx_pkts += opaque;
 607                else if (CMP_TYPE(txcmp) == HWRM_CMPL_TYPE_HWRM_DONE)
 608                        return 1;
 609        } while (nb_tx_pkts < ring_mask);
 610
 611        if (nb_tx_pkts) {
 612                cpr->cp_raw_cons = raw_cons;
 613                bnxt_db_cq(cpr);
 614        }
 615
 616        return 0;
 617}
 618