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         if (unlikely(d->d.staterr & FM10K_RXD_STATUS_HBO))
 111                 m->ol_flags |= PKT_RX_HBUF_OVERFLOW;
 112
 113         if (unlikely(d->d.staterr & FM10K_RXD_STATUS_RXE))
 114                 m->ol_flags |= PKT_RX_RECIP_ERR;
 115 }
 116
 117 uint16_t
 118 fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 119         uint16_t nb_pkts)
 120 {
 121         struct rte_mbuf *mbuf;
 122         union fm10k_rx_desc desc;
 123         struct fm10k_rx_queue *q = rx_queue;
 124         uint16_t count = 0;
 125         int alloc = 0;
 126         uint16_t next_dd;
 127         int ret;
 128
 129         next_dd = q->next_dd;
 130
 131         nb_pkts = RTE_MIN(nb_pkts, q->alloc_thresh);
 132         for (count = 0; count < nb_pkts; ++count) {
 133                 mbuf = q->sw_ring[next_dd];
 134                 desc = q->hw_ring[next_dd];
 135                 if (!(desc.d.staterr & FM10K_RXD_STATUS_DD))
 136                         break;
 137 #ifdef RTE_LIBRTE_FM10K_DEBUG_RX
 138                 dump_rxd(&desc);
 139 #endif
 140                 rte_pktmbuf_pkt_len(mbuf) = desc.w.length;
 141                 rte_pktmbuf_data_len(mbuf) = desc.w.length;
 142
 143                 mbuf->ol_flags = 0;
 144 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
 145                 rx_desc_to_ol_flags(mbuf, &desc);
 146 #endif
 147
 148                 mbuf->hash.rss = desc.d.rss;
 149                 /**
 150                  * Packets in fm10k device always carry at least one VLAN tag.
 151                  * For those packets coming in without VLAN tag,
 152                  * the port default VLAN tag will be used.
 153                  * So, always PKT_RX_VLAN_PKT flag is set and vlan_tci
 154                  * is valid for each RX packet's mbuf.
 155                  */
 156                 mbuf->ol_flags |= PKT_RX_VLAN_PKT;
 157                 mbuf->vlan_tci = desc.w.vlan;
 158                 /**
 159                  * mbuf->vlan_tci_outer is an idle field in fm10k driver,
 160                  * so it can be selected to store sglort value.
 161                  */
 162                 if (q->rx_ftag_en)
 163                         mbuf->vlan_tci_outer = rte_le_to_cpu_16(desc.w.sglort);
 164
 165                 rx_pkts[count] = mbuf;
 166                 if (++next_dd == q->nb_desc) {
 167                         next_dd = 0;
 168                         alloc = 1;
 169                 }
 170
 171                 /* Prefetch next mbuf while processing current one. */
 172                 rte_prefetch0(q->sw_ring[next_dd]);
 173
 174                 /*
 175                  * When next RX descriptor is on a cache-line boundary,
 176                  * prefetch the next 4 RX descriptors and the next 8 pointers
 177                  * to mbufs.
 178                  */
 179                 if ((next_dd & 0x3) == 0) {
 180                         rte_prefetch0(&q->hw_ring[next_dd]);
 181                         rte_prefetch0(&q->sw_ring[next_dd]);
 182                 }
 183         }
 184
 185         q->next_dd = next_dd;
 186
 187         if ((q->next_dd > q->next_trigger) || (alloc == 1)) {
 188                 ret = rte_mempool_get_bulk(q->mp,
 189                                         (void **)&q->sw_ring[q->next_alloc],
 190                                         q->alloc_thresh);
 191
 192                 if (unlikely(ret != 0)) {
 193                         uint8_t port = q->port_id;
 194                         PMD_RX_LOG(ERR, "Failed to alloc mbuf");
 195                         /*
 196                          * Need to restore next_dd if we cannot allocate new
 197                          * buffers to replenish the old ones.
 198                          */
 199                         q->next_dd = (q->next_dd + q->nb_desc - count) %
 200                                                                 q->nb_desc;
 201                         rte_eth_devices[port].data->rx_mbuf_alloc_failed++;
 202                         return 0;
 203                 }
 204
 205                 for (; q->next_alloc <= q->next_trigger; ++q->next_alloc) {
 206                         mbuf = q->sw_ring[q->next_alloc];
 207
 208                         /* setup static mbuf fields */
 209                         fm10k_pktmbuf_reset(mbuf, q->port_id);
 210
 211                         /* write descriptor */
 212                         desc.q.pkt_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 213                         desc.q.hdr_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 214                         q->hw_ring[q->next_alloc] = desc;
 215                 }
 216                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_trigger);
 217                 q->next_trigger += q->alloc_thresh;
 218                 if (q->next_trigger >= q->nb_desc) {
 219                         q->next_trigger = q->alloc_thresh - 1;
 220                         q->next_alloc = 0;
 221                 }
 222         }
 223
 224         return count;
 225 }
 226
 227 uint16_t
 228 fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 229                                 uint16_t nb_pkts)
 230 {
 231         struct rte_mbuf *mbuf;
 232         union fm10k_rx_desc desc;
 233         struct fm10k_rx_queue *q = rx_queue;
 234         uint16_t count = 0;
 235         uint16_t nb_rcv, nb_seg;
 236         int alloc = 0;
 237         uint16_t next_dd;
 238         struct rte_mbuf *first_seg = q->pkt_first_seg;
 239         struct rte_mbuf *last_seg = q->pkt_last_seg;
 240         int ret;
 241
 242         next_dd = q->next_dd;
 243         nb_rcv = 0;
 244
 245         nb_seg = RTE_MIN(nb_pkts, q->alloc_thresh);
 246         for (count = 0; count < nb_seg; count++) {
 247                 mbuf = q->sw_ring[next_dd];
 248                 desc = q->hw_ring[next_dd];
 249                 if (!(desc.d.staterr & FM10K_RXD_STATUS_DD))
 250                         break;
 251 #ifdef RTE_LIBRTE_FM10K_DEBUG_RX
 252                 dump_rxd(&desc);
 253 #endif
 254
 255                 if (++next_dd == q->nb_desc) {
 256                         next_dd = 0;
 257                         alloc = 1;
 258                 }
 259
 260                 /* Prefetch next mbuf while processing current one. */
 261                 rte_prefetch0(q->sw_ring[next_dd]);
 262
 263                 /*
 264                  * When next RX descriptor is on a cache-line boundary,
 265                  * prefetch the next 4 RX descriptors and the next 8 pointers
 266                  * to mbufs.
 267                  */
 268                 if ((next_dd & 0x3) == 0) {
 269                         rte_prefetch0(&q->hw_ring[next_dd]);
 270                         rte_prefetch0(&q->sw_ring[next_dd]);
 271                 }
 272
 273                 /* Fill data length */
 274                 rte_pktmbuf_data_len(mbuf) = desc.w.length;
 275
 276                 /*
 277                  * If this is the first buffer of the received packet,
 278                  * set the pointer to the first mbuf of the packet and
 279                  * initialize its context.
 280                  * Otherwise, update the total length and the number of segments
 281                  * of the current scattered packet, and update the pointer to
 282                  * the last mbuf of the current packet.
 283                  */
 284                 if (!first_seg) {
 285                         first_seg = mbuf;
 286                         first_seg->pkt_len = desc.w.length;
 287                 } else {
 288                         first_seg->pkt_len =
 289                                         (uint16_t)(first_seg->pkt_len +
 290                                         rte_pktmbuf_data_len(mbuf));
 291                         first_seg->nb_segs++;
 292                         last_seg->next = mbuf;
 293                 }
 294
 295                 /*
 296                  * If this is not the last buffer of the received packet,
 297                  * update the pointer to the last mbuf of the current scattered
 298                  * packet and continue to parse the RX ring.
 299                  */
 300                 if (!(desc.d.staterr & FM10K_RXD_STATUS_EOP)) {
 301                         last_seg = mbuf;
 302                         continue;
 303                 }
 304
 305                 first_seg->ol_flags = 0;
 306 #ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE
 307                 rx_desc_to_ol_flags(first_seg, &desc);
 308 #endif
 309                 first_seg->hash.rss = desc.d.rss;
 310                 /**
 311                  * Packets in fm10k device always carry at least one VLAN tag.
 312                  * For those packets coming in without VLAN tag,
 313                  * the port default VLAN tag will be used.
 314                  * So, always PKT_RX_VLAN_PKT flag is set and vlan_tci
 315                  * is valid for each RX packet's mbuf.
 316                  */
 317                 first_seg->ol_flags |= PKT_RX_VLAN_PKT;
 318                 first_seg->vlan_tci = desc.w.vlan;
 319                 /**
 320                  * mbuf->vlan_tci_outer is an idle field in fm10k driver,
 321                  * so it can be selected to store sglort value.
 322                  */
 323                 if (q->rx_ftag_en)
 324                         first_seg->vlan_tci_outer =
 325                                 rte_le_to_cpu_16(desc.w.sglort);
 326
 327                 /* Prefetch data of first segment, if configured to do so. */
 328                 rte_packet_prefetch((char *)first_seg->buf_addr +
 329                         first_seg->data_off);
 330
 331                 /*
 332                  * Store the mbuf address into the next entry of the array
 333                  * of returned packets.
 334                  */
 335                 rx_pkts[nb_rcv++] = first_seg;
 336
 337                 /*
 338                  * Setup receipt context for a new packet.
 339                  */
 340                 first_seg = NULL;
 341         }
 342
 343         q->next_dd = next_dd;
 344
 345         if ((q->next_dd > q->next_trigger) || (alloc == 1)) {
 346                 ret = rte_mempool_get_bulk(q->mp,
 347                                         (void **)&q->sw_ring[q->next_alloc],
 348                                         q->alloc_thresh);
 349
 350                 if (unlikely(ret != 0)) {
 351                         uint8_t port = q->port_id;
 352                         PMD_RX_LOG(ERR, "Failed to alloc mbuf");
 353                         /*
 354                          * Need to restore next_dd if we cannot allocate new
 355                          * buffers to replenish the old ones.
 356                          */
 357                         q->next_dd = (q->next_dd + q->nb_desc - count) %
 358                                                                 q->nb_desc;
 359                         rte_eth_devices[port].data->rx_mbuf_alloc_failed++;
 360                         return 0;
 361                 }
 362
 363                 for (; q->next_alloc <= q->next_trigger; ++q->next_alloc) {
 364                         mbuf = q->sw_ring[q->next_alloc];
 365
 366                         /* setup static mbuf fields */
 367                         fm10k_pktmbuf_reset(mbuf, q->port_id);
 368
 369                         /* write descriptor */
 370                         desc.q.pkt_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 371                         desc.q.hdr_addr = MBUF_DMA_ADDR_DEFAULT(mbuf);
 372                         q->hw_ring[q->next_alloc] = desc;
 373                 }
 374                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_trigger);
 375                 q->next_trigger += q->alloc_thresh;
 376                 if (q->next_trigger >= q->nb_desc) {
 377                         q->next_trigger = q->alloc_thresh - 1;
 378                         q->next_alloc = 0;
 379                 }
 380         }
 381
 382         q->pkt_first_seg = first_seg;
 383         q->pkt_last_seg = last_seg;
 384
 385         return nb_rcv;
 386 }
 387
 388 int
 389 fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
 390 {
 391         volatile union fm10k_rx_desc *rxdp;
 392         struct fm10k_rx_queue *rxq = rx_queue;
 393         uint16_t desc;
 394         int ret;
 395
 396         if (unlikely(offset >= rxq->nb_desc)) {
 397                 PMD_DRV_LOG(ERR, "Invalid RX descriptor offset %u", offset);
 398                 return 0;
 399         }
 400
 401         desc = rxq->next_dd + offset;
 402         if (desc >= rxq->nb_desc)
 403                 desc -= rxq->nb_desc;
 404
 405         rxdp = &rxq->hw_ring[desc];
 406
 407         ret = !!(rxdp->w.status &
 408                         rte_cpu_to_le_16(FM10K_RXD_STATUS_DD));
 409
 410         return ret;
 411 }
 412
 413 /*
 414  * Free multiple TX mbuf at a time if they are in the same pool
 415  *
 416  * @txep: software desc ring index that starts to free
 417  * @num: number of descs to free
 418  *
 419  */
 420 static inline void tx_free_bulk_mbuf(struct rte_mbuf **txep, int num)
 421 {
 422         struct rte_mbuf *m, *free[RTE_FM10K_TX_MAX_FREE_BUF_SZ];
 423         int i;
 424         int nb_free = 0;
 425
 426         if (unlikely(num == 0))
 427                 return;
 428
 429         m = __rte_pktmbuf_prefree_seg(txep[0]);
 430         if (likely(m != NULL)) {
 431                 free[0] = m;
 432                 nb_free = 1;
 433                 for (i = 1; i < num; i++) {
 434                         m = __rte_pktmbuf_prefree_seg(txep[i]);
 435                         if (likely(m != NULL)) {
 436                                 if (likely(m->pool == free[0]->pool))
 437                                         free[nb_free++] = m;
 438                                 else {
 439                                         rte_mempool_put_bulk(free[0]->pool,
 440                                                         (void *)free, nb_free);
 441                                         free[0] = m;
 442                                         nb_free = 1;
 443                                 }
 444                         }
 445                         txep[i] = NULL;
 446                 }
 447                 rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free);
 448         } else {
 449                 for (i = 1; i < num; i++) {
 450                         m = __rte_pktmbuf_prefree_seg(txep[i]);
 451                         if (m != NULL)
 452                                 rte_mempool_put(m->pool, m);
 453                         txep[i] = NULL;
 454                 }
 455         }
 456 }
 457
 458 static inline void tx_free_descriptors(struct fm10k_tx_queue *q)
 459 {
 460         uint16_t next_rs, count = 0;
 461
 462         next_rs = fifo_peek(&q->rs_tracker);
 463         if (!(q->hw_ring[next_rs].flags & FM10K_TXD_FLAG_DONE))
 464                 return;
 465
 466         /* the DONE flag is set on this descriptor so remove the ID
 467          * from the RS bit tracker and free the buffers */
 468         fifo_remove(&q->rs_tracker);
 469
 470         /* wrap around? if so, free buffers from last_free up to but NOT
 471          * including nb_desc */
 472         if (q->last_free > next_rs) {
 473                 count = q->nb_desc - q->last_free;
 474                 tx_free_bulk_mbuf(&q->sw_ring[q->last_free], count);
 475                 q->last_free = 0;
 476         }
 477
 478         /* adjust free descriptor count before the next loop */
 479         q->nb_free += count + (next_rs + 1 - q->last_free);
 480
 481         /* free buffers from last_free, up to and including next_rs */
 482         if (q->last_free <= next_rs) {
 483                 count = next_rs - q->last_free + 1;
 484                 tx_free_bulk_mbuf(&q->sw_ring[q->last_free], count);
 485                 q->last_free += count;
 486         }
 487
 488         if (q->last_free == q->nb_desc)
 489                 q->last_free = 0;
 490 }
 491
 492 static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 493 {
 494         uint16_t last_id;
 495         uint8_t flags, hdrlen;
 496
 497         /* always set the LAST flag on the last descriptor used to
 498          * transmit the packet */
 499         flags = FM10K_TXD_FLAG_LAST;
 500         last_id = q->next_free + mb->nb_segs - 1;
 501         if (last_id >= q->nb_desc)
 502                 last_id = last_id - q->nb_desc;
 503
 504         /* but only set the RS flag on the last descriptor if rs_thresh
 505          * descriptors will be used since the RS flag was last set */
 506         if ((q->nb_used + mb->nb_segs) >= q->rs_thresh) {
 507                 flags |= FM10K_TXD_FLAG_RS;
 508                 fifo_insert(&q->rs_tracker, last_id);
 509                 q->nb_used = 0;
 510         } else {
 511                 q->nb_used = q->nb_used + mb->nb_segs;
 512         }
 513
 514         q->nb_free -= mb->nb_segs;
 515
 516         q->hw_ring[q->next_free].flags = 0;
 517         if (q->tx_ftag_en)
 518                 q->hw_ring[q->next_free].flags |= FM10K_TXD_FLAG_FTAG;
 519         /* set checksum flags on first descriptor of packet. SCTP checksum
 520          * offload is not supported, but we do not explicitly check for this
 521          * case in favor of greatly simplified processing. */
 522         if (mb->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG))
 523                 q->hw_ring[q->next_free].flags |= FM10K_TXD_FLAG_CSUM;
 524
 525         /* set vlan if requested */
 526         if (mb->ol_flags & PKT_TX_VLAN_PKT)
 527                 q->hw_ring[q->next_free].vlan = mb->vlan_tci;
 528
 529         q->sw_ring[q->next_free] = mb;
 530         q->hw_ring[q->next_free].buffer_addr =
 531                         rte_cpu_to_le_64(MBUF_DMA_ADDR(mb));
 532         q->hw_ring[q->next_free].buflen =
 533                         rte_cpu_to_le_16(rte_pktmbuf_data_len(mb));
 534
 535         if (mb->ol_flags & PKT_TX_TCP_SEG) {
 536                 hdrlen = mb->outer_l2_len + mb->outer_l3_len + mb->l2_len +
 537                         mb->l3_len + mb->l4_len;
 538                 if (q->hw_ring[q->next_free].flags & FM10K_TXD_FLAG_FTAG)
 539                         hdrlen += sizeof(struct fm10k_ftag);
 540
 541                 if (likely((hdrlen >= FM10K_TSO_MIN_HEADERLEN) &&
 542                                 (hdrlen <= FM10K_TSO_MAX_HEADERLEN) &&
 543                                 (mb->tso_segsz >= FM10K_TSO_MINMSS))) {
 544                         q->hw_ring[q->next_free].mss = mb->tso_segsz;
 545                         q->hw_ring[q->next_free].hdrlen = hdrlen;
 546                 }
 547         }
 548
 549         if (++q->next_free == q->nb_desc)
 550                 q->next_free = 0;
 551
 552         /* fill up the rings */
 553         for (mb = mb->next; mb != NULL; mb = mb->next) {
 554                 q->sw_ring[q->next_free] = mb;
 555                 q->hw_ring[q->next_free].buffer_addr =
 556                                 rte_cpu_to_le_64(MBUF_DMA_ADDR(mb));
 557                 q->hw_ring[q->next_free].buflen =
 558                                 rte_cpu_to_le_16(rte_pktmbuf_data_len(mb));
 559                 q->hw_ring[q->next_free].flags = 0;
 560                 if (++q->next_free == q->nb_desc)
 561                         q->next_free = 0;
 562         }
 563
 564         q->hw_ring[last_id].flags |= flags;
 565 }
 566
 567 uint16_t
 568 fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 569         uint16_t nb_pkts)
 570 {
 571         struct fm10k_tx_queue *q = tx_queue;
 572         struct rte_mbuf *mb;
 573         uint16_t count;
 574
 575         for (count = 0; count < nb_pkts; ++count) {
 576                 mb = tx_pkts[count];
 577
 578                 /* running low on descriptors? try to free some... */
 579                 if (q->nb_free < q->free_thresh)
 580                         tx_free_descriptors(q);
 581
 582                 /* make sure there are enough free descriptors to transmit the
 583                  * entire packet before doing anything */
 584                 if (q->nb_free < mb->nb_segs)
 585                         break;
 586
 587                 /* sanity check to make sure the mbuf is valid */
 588                 if ((mb->nb_segs == 0) ||
 589                     ((mb->nb_segs > 1) && (mb->next == NULL)))
 590                         break;
 591
 592                 /* process the packet */
 593                 tx_xmit_pkt(q, mb);
 594         }
 595
 596         /* update the tail pointer if any packets were processed */
 597         if (likely(count > 0))
 598                 FM10K_PCI_REG_WRITE(q->tail_ptr, q->next_free);
 599
 600         return count;
 601 }