drivers/net/fm10k/fm10k_rxtx.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <inttypes.h>
  35
  36 #include <rte_ethdev.h>
  37 #include <rte_common.h>
  38 #include "fm10k.h"
  39 #include "base/fm10k_type.h"
  40
  41 #ifdef RTE_PMD_PACKET_PREFETCH
  42 #define rte_packet_prefetch(p)  rte_prefetch1(p)
  43 #else
  44 #define rte_packet_prefetch(p)  do {} while (0)
  45 #endif
  46
  47 #ifdef RTE_LIBRTE_FM10K_DEBUG_RX
  48 static inline void dump_rxd(union fm10k_rx_desc *rxd)
  49 {
  50         PMD_RX_LOG(DEBUG, "+----------------|----------------+");
  51         PMD_RX_LOG(DEBUG, "|     GLORT      | PKT HDR & TYPE |");
  52         PMD_RX_LOG(DEBUG, "|   0x%08x   |   0x%08x   |", rxd->d.glort,
  53                         rxd->d.data);
  54         PMD_RX_LOG(DEBUG, "+----------------|----------------+");
  55         PMD_RX_LOG(DEBUG, "|   VLAN & LEN   |     STATUS     |");
  56         PMD_RX_LOG(DEBUG, "|   0x%08x   |   0x%08x   |", rxd->d.vlan_len,
  57                         rxd->d.staterr);
  58         PMD_RX_LOG(DEBUG, "+----------------|----------------+");
  59         PMD_RX_LOG(DEBUG, "|    RESERVED    |    RSS_HASH    |");
  60         PMD_RX_LOG(DEBUG, "|   0x%08x   |   0x%08x   |", 0, rxd->d.rss);
  61         PMD_RX_LOG(DEBUG, "+----------------|----------------+");
  62         PMD_RX_LOG(DEBUG, "|            TIME TAG             |");
  63         PMD_RX_LOG(DEBUG, "|       0x%016"PRIx64"        |", rxd->q.timestamp);
  64         PMD_RX_LOG(DEBUG, "+----------------|----------------+");
  65 }
  66 #endif
  67
  68 /* @note: When this function is changed, make corresponding change to
  69  * fm10k_dev_supported_ptypes_get()
  70  */
  71 static inline void
  72 rx_desc_to_ol_flags(struct rte_mbuf *m, const union fm10k_rx_desc *d)
  73 {
  74         static const uint32_t
  75                 ptype_table[FM10K_RXD_PKTTYPE_MASK >> FM10K_RXD_PKTTYPE_SHIFT]
  76                         __rte_cache_aligned = {
  77                 [FM10K_PKTTYPE_OTHER] = RTE_PTYPE_L2_ETHER,
  78                 [FM10K_PKTTYPE_IPV4] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4,
  79                 [FM10K_PKTTYPE_IPV4_EX] = RTE_PTYPE_L2_ETHER |
  80                         RTE_PTYPE_L3_IPV4_EXT,
  81                 [FM10K_PKTTYPE_IPV6] = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6,
  82                 [FM10K_PKTTYPE_IPV6_EX] = RTE_PTYPE_L2_ETHER |
  83                         RTE_PTYPE_L3_IPV6_EXT,
  84                 [FM10K_PKTTYPE_IPV4 | FM10K_PKTTYPE_TCP] = RTE_PTYPE_L2_ETHER |
  85                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_TCP,
  86                 [FM10K_PKTTYPE_IPV6 | FM10K_PKTTYPE_TCP] = RTE_PTYPE_L2_ETHER |
  87                         RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_TCP,
  88                 [FM10K_PKTTYPE_IPV4 | FM10K_PKTTYPE_UDP] = RTE_PTYPE_L2_ETHER |
  89                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_UDP,
  90                 [FM10K_PKTTYPE_IPV6 | FM10K_PKTTYPE_UDP] = RTE_PTYPE_L2_ETHER |
  91                         RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_UDP,
  92         };
  93
  94         m->packet_type = ptype_table[(d->w.pkt_info & FM10K_RXD_PKTTYPE_MASK)
  95                                                 >> FM10K_RXD_PKTTYPE_SHIFT];
  96
  97         if (d->w.pkt_info & FM10K_RXD_RSSTYPE_MASK)
  98                 m->ol_flags |= PKT_RX_RSS_HASH;
  99
 100         if (unlikely((d->d.staterr &
 101                 (FM10K_RXD_STATUS_IPCS | FM10K_RXD_STATUS_IPE)) ==
 102                 (FM10K_RXD_STATUS_IPCS | FM10K_RXD_STATUS_IPE)))
 103                 m->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 104
 105         if (unlikely((d->d.staterr &
 106                 (FM10K_RXD_STATUS_L4CS | FM10K_RXD_STATUS_L4E)) ==
 107                 (FM10K_RXD_STATUS_L4CS | FM10K_RXD_STATUS_L4E)))
 108                 m->ol_flags |= PKT_RX_L4_CKSUM_BAD;
 109 }
 110
 111 uint16_t
 112 fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 113         uint16_t nb_pkts)
 114 {
 115         struct rte_mbuf *mbuf;
 116         union fm10k_rx_desc desc;
 117         struct fm10k_rx_queue *q = rx_queue;
 118         uint16_t count = 0;
 119         int alloc = 0;
 120         uint16_t next_dd;
 121         int ret;
 122
 123         next_dd = q->next_dd;
 124
 125         nb_pkts = RTE_MIN(nb_pkts, q->alloc_thresh);
 126         for (count = 0; count < nb_pkts; ++count) {
 127                 if (!(q->hw_ring[next_dd].d.staterr & FM10K_RXD_STATUS_DD))
 128                         break;
 129                 mbuf = q->sw_ring[next_dd];
 130                 desc = q->hw_ring[next_dd];
 131 #ifdef RTE_LIBRTE_FM10K_DEBUG_RX
 132                 dump_rxd(&desc);
 133 #endif
 134                 rte_pktmbuf_pkt_len(mbuf) = desc.w.length;
 135                 rte_pktmbuf_data_len(mbuf) = desc.w.length;
 136
 137                 mbuf->ol_flags = 0;
 138 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
 139                 rx_desc_to_ol_flags(mbuf, &desc);
 140 #endif
 141
 142                 mbuf->hash.rss = desc.d.rss;
 143                 /**
 144                  * Packets in fm10k device always carry at least one VLAN tag.
 145                  * For those packets coming in without VLAN tag,
 146                  * the port default VLAN tag will be used.
 147                  * So, always PKT_RX_VLAN_PKT flag is set and vlan_tci
 148                  * is valid for each RX packet's mbuf.
 149                  */
 150                 mbuf->ol_flags |= PKT_RX_VLAN_PKT;
 151                 mbuf->vlan_tci = desc.w.vlan;
 152                 /**
 153                  * mbuf->vlan_tci_outer is an idle field in fm10k driver,
 154                  * so it can be selected to store sglort value.
 155                  */
 156                 if (q->rx_ftag_en)
 157                         mbuf->vlan_tci_outer = rte_le_to_cpu_16(desc.w.sglort);
 158
 159                 rx_pkts[count] = mbuf;
 160                 if (++next_dd == q->nb_desc) {
 161                         next_dd = 0;
 162                         alloc = 1;
 163                 }
 164
 165                 /* Prefetch next mbuf while processing current one. */
 166                 rte_prefetch0(q->sw_ring[next_dd]);
 167
 168                 /*
 169                  * When next RX descriptor is on a cache-line boundary,
 170                  * prefetch the next 4 RX descriptors and the next 8 pointers
 171                  * to mbufs.
 172                  */
 173                 if ((next_dd & 0x3) == 0) {
 174                         rte_prefetch0(&q->hw_ring[next_dd]);
 175                         rte_prefetch0(&q->sw_ring[next_dd]);
 176                 }
 177         }
 178
 179         q->next_dd = next_dd;
 180
 181         if ((q->next_dd > q->next_trigger) || (alloc == 1)) {
 182                 ret = rte_mempool_get_bulk(q->mp,
 183                                         (void **)&q->sw_ring[q->next_alloc],
 184                                         q->alloc_thresh);
 185
 186                 if (unlikely(ret != 0)) {
 187                         uint8_t port = q->port_id;
 188                         PMD_RX_LOG(ERR, "Failed to alloc mbuf");
 189                         /*
 190                          * Need to restore next_dd if we cannot allocate new
 191                          * buffers to replenish the old ones.
 192                          */
 193                         q->next_dd = (q->next_dd + q->nb_desc - count) %
 194                                                                 q->nb_desc;
 195                         rte_eth_devices[port].data->rx_mbuf_alloc_failed++;
 196                         return 0;
 197                 }
 198
 199                 for (; q->next_alloc <= q->next_trigger; ++q->next_alloc) {
 200                         mbuf = q->sw_ring[q->next_alloc];
 201
 202                         /* setup static mbuf fields */
 203                         fm10k_pktmbuf_reset(mbuf, q->port_id);
 204
 205                         /* write descriptor */
 206                         desc.q.pkt_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 207                         desc.q.hdr_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 208                         q->hw_ring[q->next_alloc] = desc;
 209                 }
 210                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_trigger);
 211                 q->next_trigger += q->alloc_thresh;
 212                 if (q->next_trigger >= q->nb_desc) {
 213                         q->next_trigger = q->alloc_thresh - 1;
 214                         q->next_alloc = 0;
 215                 }
 216         }
 217
 218         return count;
 219 }
 220
 221 uint16_t
 222 fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 223                                 uint16_t nb_pkts)
 224 {
 225         struct rte_mbuf *mbuf;
 226         union fm10k_rx_desc desc;
 227         struct fm10k_rx_queue *q = rx_queue;
 228         uint16_t count = 0;
 229         uint16_t nb_rcv, nb_seg;
 230         int alloc = 0;
 231         uint16_t next_dd;
 232         struct rte_mbuf *first_seg = q->pkt_first_seg;
 233         struct rte_mbuf *last_seg = q->pkt_last_seg;
 234         int ret;
 235
 236         next_dd = q->next_dd;
 237         nb_rcv = 0;
 238
 239         nb_seg = RTE_MIN(nb_pkts, q->alloc_thresh);
 240         for (count = 0; count < nb_seg; count++) {
 241                 if (!(q->hw_ring[next_dd].d.staterr & FM10K_RXD_STATUS_DD))
 242                         break;
 243                 mbuf = q->sw_ring[next_dd];
 244                 desc = q->hw_ring[next_dd];
 245 #ifdef RTE_LIBRTE_FM10K_DEBUG_RX
 246                 dump_rxd(&desc);
 247 #endif
 248
 249                 if (++next_dd == q->nb_desc) {
 250                         next_dd = 0;
 251                         alloc = 1;
 252                 }
 253
 254                 /* Prefetch next mbuf while processing current one. */
 255                 rte_prefetch0(q->sw_ring[next_dd]);
 256
 257                 /*
 258                  * When next RX descriptor is on a cache-line boundary,
 259                  * prefetch the next 4 RX descriptors and the next 8 pointers
 260                  * to mbufs.
 261                  */
 262                 if ((next_dd & 0x3) == 0) {
 263                         rte_prefetch0(&q->hw_ring[next_dd]);
 264                         rte_prefetch0(&q->sw_ring[next_dd]);
 265                 }
 266
 267                 /* Fill data length */
 268                 rte_pktmbuf_data_len(mbuf) = desc.w.length;
 269
 270                 /*
 271                  * If this is the first buffer of the received packet,
 272                  * set the pointer to the first mbuf of the packet and
 273                  * initialize its context.
 274                  * Otherwise, update the total length and the number of segments
 275                  * of the current scattered packet, and update the pointer to
 276                  * the last mbuf of the current packet.
 277                  */
 278                 if (!first_seg) {
 279                         first_seg = mbuf;
 280                         first_seg->pkt_len = desc.w.length;
 281                 } else {
 282                         first_seg->pkt_len =
 283                                         (uint16_t)(first_seg->pkt_len +
 284                                         rte_pktmbuf_data_len(mbuf));
 285                         first_seg->nb_segs++;
 286                         last_seg->next = mbuf;
 287                 }
 288
 289                 /*
 290                  * If this is not the last buffer of the received packet,
 291                  * update the pointer to the last mbuf of the current scattered
 292                  * packet and continue to parse the RX ring.
 293                  */
 294                 if (!(desc.d.staterr & FM10K_RXD_STATUS_EOP)) {
 295                         last_seg = mbuf;
 296                         continue;
 297                 }
 298
 299                 first_seg->ol_flags = 0;
 300 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
 301                 rx_desc_to_ol_flags(first_seg, &desc);
 302 #endif
 303                 first_seg->hash.rss = desc.d.rss;
 304                 /**
 305                  * Packets in fm10k device always carry at least one VLAN tag.
 306                  * For those packets coming in without VLAN tag,
 307                  * the port default VLAN tag will be used.
 308                  * So, always PKT_RX_VLAN_PKT flag is set and vlan_tci
 309                  * is valid for each RX packet's mbuf.
 310                  */
 311                 first_seg->ol_flags |= PKT_RX_VLAN_PKT;
 312                 first_seg->vlan_tci = desc.w.vlan;
 313                 /**
 314                  * mbuf->vlan_tci_outer is an idle field in fm10k driver,
 315                  * so it can be selected to store sglort value.
 316                  */
 317                 if (q->rx_ftag_en)
 318                         first_seg->vlan_tci_outer =
 319                                 rte_le_to_cpu_16(desc.w.sglort);
 320
 321                 /* Prefetch data of first segment, if configured to do so. */
 322                 rte_packet_prefetch((char *)first_seg->buf_addr +
 323                         first_seg->data_off);
 324
 325                 /*
 326                  * Store the mbuf address into the next entry of the array
 327                  * of returned packets.
 328                  */
 329                 rx_pkts[nb_rcv++] = first_seg;
 330
 331                 /*
 332                  * Setup receipt context for a new packet.
 333                  */
 334                 first_seg = NULL;
 335         }
 336
 337         q->next_dd = next_dd;
 338
 339         if ((q->next_dd > q->next_trigger) || (alloc == 1)) {
 340                 ret = rte_mempool_get_bulk(q->mp,
 341                                         (void **)&q->sw_ring[q->next_alloc],
 342                                         q->alloc_thresh);
 343
 344                 if (unlikely(ret != 0)) {
 345                         uint8_t port = q->port_id;
 346                         PMD_RX_LOG(ERR, "Failed to alloc mbuf");
 347                         /*
 348                          * Need to restore next_dd if we cannot allocate new
 349                          * buffers to replenish the old ones.
 350                          */
 351                         q->next_dd = (q->next_dd + q->nb_desc - count) %
 352                                                                 q->nb_desc;
 353                         rte_eth_devices[port].data->rx_mbuf_alloc_failed++;
 354                         return 0;
 355                 }
 356
 357                 for (; q->next_alloc <= q->next_trigger; ++q->next_alloc) {
 358                         mbuf = q->sw_ring[q->next_alloc];
 359
 360                         /* setup static mbuf fields */
 361                         fm10k_pktmbuf_reset(mbuf, q->port_id);
 362
 363                         /* write descriptor */
 364                         desc.q.pkt_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 365                         desc.q.hdr_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 366                         q->hw_ring[q->next_alloc] = desc;
 367                 }
 368                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_trigger);
 369                 q->next_trigger += q->alloc_thresh;
 370                 if (q->next_trigger >= q->nb_desc) {
 371                         q->next_trigger = q->alloc_thresh - 1;
 372                         q->next_alloc = 0;
 373                 }
 374         }
 375
 376         q->pkt_first_seg = first_seg;
 377         q->pkt_last_seg = last_seg;
 378
 379         return nb_rcv;
 380 }
 381
 382 int
 383 fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
 384 {
 385         volatile union fm10k_rx_desc *rxdp;
 386         struct fm10k_rx_queue *rxq = rx_queue;
 387         uint16_t desc;
 388         int ret;
 389
 390         if (unlikely(offset >= rxq->nb_desc)) {
 391                 PMD_DRV_LOG(ERR, "Invalid RX descriptor offset %u", offset);
 392                 return 0;
 393         }
 394
 395         desc = rxq->next_dd + offset;
 396         if (desc >= rxq->nb_desc)
 397                 desc -= rxq->nb_desc;
 398
 399         rxdp = &rxq->hw_ring[desc];
 400
 401         ret = !!(rxdp->w.status &
 402                         rte_cpu_to_le_16(FM10K_RXD_STATUS_DD));
 403
 404         return ret;
 405 }
 406
 407 /*
 408  * Free multiple TX mbuf at a time if they are in the same pool
 409  *
 410  * @txep: software desc ring index that starts to free
 411  * @num: number of descs to free
 412  *
 413  */
 414 static inline void tx_free_bulk_mbuf(struct rte_mbuf **txep, int num)
 415 {
 416         struct rte_mbuf *m, *free[RTE_FM10K_TX_MAX_FREE_BUF_SZ];
 417         int i;
 418         int nb_free = 0;
 419
 420         if (unlikely(num == 0))
 421                 return;
 422
 423         m = __rte_pktmbuf_prefree_seg(txep[0]);
 424         if (likely(m != NULL)) {
 425                 free[0] = m;
 426                 nb_free = 1;
 427                 for (i = 1; i < num; i++) {
 428                         m = __rte_pktmbuf_prefree_seg(txep[i]);
 429                         if (likely(m != NULL)) {
 430                                 if (likely(m->pool == free[0]->pool))
 431                                         free[nb_free++] = m;
 432                                 else {
 433                                         rte_mempool_put_bulk(free[0]->pool,
 434                                                         (void *)free, nb_free);
 435                                         free[0] = m;
 436                                         nb_free = 1;
 437                                 }
 438                         }
 439                         txep[i] = NULL;
 440                 }
 441                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 442         } else {
 443                 for (i = 1; i < num; i++) {
 444                         m = __rte_pktmbuf_prefree_seg(txep[i]);
 445                         if (m != NULL)
 446                                 rte_mempool_put(m->pool, m);
 447                         txep[i] = NULL;
 448                 }
 449         }
 450 }
 451
 452 static inline void tx_free_descriptors(struct fm10k_tx_queue *q)
 453 {
 454         uint16_t next_rs, count = 0;
 455
 456         next_rs = fifo_peek(&q->rs_tracker);
 457         if (!(q->hw_ring[next_rs].flags & FM10K_TXD_FLAG_DONE))
 458                 return;
 459
 460         /* the DONE flag is set on this descriptor so remove the ID
 461          * from the RS bit tracker and free the buffers */
 462         fifo_remove(&q->rs_tracker);
 463
 464         /* wrap around? if so, free buffers from last_free up to but NOT
 465          * including nb_desc */
 466         if (q->last_free > next_rs) {
 467                 count = q->nb_desc - q->last_free;
 468                 tx_free_bulk_mbuf(&q->sw_ring[q->last_free], count);
 469                 q->last_free = 0;
 470         }
 471
 472         /* adjust free descriptor count before the next loop */
 473         q->nb_free += count + (next_rs + 1 - q->last_free);
 474
 475         /* free buffers from last_free, up to and including next_rs */
 476         if (q->last_free <= next_rs) {
 477                 count = next_rs - q->last_free + 1;
 478                 tx_free_bulk_mbuf(&q->sw_ring[q->last_free], count);
 479                 q->last_free += count;
 480         }
 481
 482         if (q->last_free == q->nb_desc)
 483                 q->last_free = 0;
 484 }
 485
 486 static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 487 {
 488         uint16_t last_id;
 489         uint8_t flags, hdrlen;
 490
 491         /* always set the LAST flag on the last descriptor used to
 492          * transmit the packet */
 493         flags = FM10K_TXD_FLAG_LAST;
 494         last_id = q->next_free + mb->nb_segs - 1;
 495         if (last_id >= q->nb_desc)
 496                 last_id = last_id - q->nb_desc;
 497
 498         /* but only set the RS flag on the last descriptor if rs_thresh
 499          * descriptors will be used since the RS flag was last set */
 500         if ((q->nb_used + mb->nb_segs) >= q->rs_thresh) {
 501                 flags |= FM10K_TXD_FLAG_RS;
 502                 fifo_insert(&q->rs_tracker, last_id);
 503                 q->nb_used = 0;
 504         } else {
 505                 q->nb_used = q->nb_used + mb->nb_segs;
 506         }
 507
 508         q->nb_free -= mb->nb_segs;
 509
 510         q->hw_ring[q->next_free].flags = 0;
 511         if (q->tx_ftag_en)
 512                 q->hw_ring[q->next_free].flags |= FM10K_TXD_FLAG_FTAG;
 513         /* set checksum flags on first descriptor of packet. SCTP checksum
 514          * offload is not supported, but we do not explicitly check for this
 515          * case in favor of greatly simplified processing. */
 516         if (mb->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG))
 517                 q->hw_ring[q->next_free].flags |= FM10K_TXD_FLAG_CSUM;
 518
 519         /* set vlan if requested */
 520         if (mb->ol_flags & PKT_TX_VLAN_PKT)
 521                 q->hw_ring[q->next_free].vlan = mb->vlan_tci;
 522
 523         q->sw_ring[q->next_free] = mb;
 524         q->hw_ring[q->next_free].buffer_addr =
 525                         rte_cpu_to_le_64(MBUF_DMA_ADDR(mb));
 526         q->hw_ring[q->next_free].buflen =
 527                         rte_cpu_to_le_16(rte_pktmbuf_data_len(mb));
 528
 529         if (mb->ol_flags & PKT_TX_TCP_SEG) {
 530                 hdrlen = mb->outer_l2_len + mb->outer_l3_len + mb->l2_len +
 531                         mb->l3_len + mb->l4_len;
 532                 if (q->hw_ring[q->next_free].flags & FM10K_TXD_FLAG_FTAG)
 533                         hdrlen += sizeof(struct fm10k_ftag);
 534
 535                 if (likely((hdrlen >= FM10K_TSO_MIN_HEADERLEN) &&
 536                                 (hdrlen <= FM10K_TSO_MAX_HEADERLEN) &&
 537                                 (mb->tso_segsz >= FM10K_TSO_MINMSS))) {
 538                         q->hw_ring[q->next_free].mss = mb->tso_segsz;
 539                         q->hw_ring[q->next_free].hdrlen = hdrlen;
 540                 }
 541         }
 542
 543         if (++q->next_free == q->nb_desc)
 544                 q->next_free = 0;
 545
 546         /* fill up the rings */
 547         for (mb = mb->next; mb != NULL; mb = mb->next) {
 548                 q->sw_ring[q->next_free] = mb;
 549                 q->hw_ring[q->next_free].buffer_addr =
 550                                 rte_cpu_to_le_64(MBUF_DMA_ADDR(mb));
 551                 q->hw_ring[q->next_free].buflen =
 552                                 rte_cpu_to_le_16(rte_pktmbuf_data_len(mb));
 553                 q->hw_ring[q->next_free].flags = 0;
 554                 if (++q->next_free == q->nb_desc)
 555                         q->next_free = 0;
 556         }
 557
 558         q->hw_ring[last_id].flags |= flags;
 559 }
 560
 561 uint16_t
 562 fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 563         uint16_t nb_pkts)
 564 {
 565         struct fm10k_tx_queue *q = tx_queue;
 566         struct rte_mbuf *mb;
 567         uint16_t count;
 568
 569         for (count = 0; count < nb_pkts; ++count) {
 570                 mb = tx_pkts[count];
 571
 572                 /* running low on descriptors? try to free some... */
 573                 if (q->nb_free < q->free_thresh)
 574                         tx_free_descriptors(q);
 575
 576                 /* make sure there are enough free descriptors to transmit the
 577                  * entire packet before doing anything */
 578                 if (q->nb_free < mb->nb_segs)
 579                         break;
 580
 581                 /* sanity check to make sure the mbuf is valid */
 582                 if ((mb->nb_segs == 0) ||
 583                     ((mb->nb_segs > 1) && (mb->next == NULL)))
 584                         break;
 585
 586                 /* process the packet */
 587                 tx_xmit_pkt(q, mb);
 588         }
 589
 590         /* update the tail pointer if any packets were processed */
 591         if (likely(count > 0))
 592                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_free);
 593
 594         return count;
 595 }