lib/librte_pmd_e1000/igb_rxtx.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 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 <sys/queue.h>
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <errno.h>
  40 #include <stdint.h>
  41 #include <stdarg.h>
  42 #include <inttypes.h>
  43
  44 #include <rte_interrupts.h>
  45 #include <rte_byteorder.h>
  46 #include <rte_common.h>
  47 #include <rte_log.h>
  48 #include <rte_debug.h>
  49 #include <rte_pci.h>
  50 #include <rte_memory.h>
  51 #include <rte_memcpy.h>
  52 #include <rte_memzone.h>
  53 #include <rte_launch.h>
  54 #include <rte_tailq.h>
  55 #include <rte_eal.h>
  56 #include <rte_per_lcore.h>
  57 #include <rte_lcore.h>
  58 #include <rte_atomic.h>
  59 #include <rte_branch_prediction.h>
  60 #include <rte_ring.h>
  61 #include <rte_mempool.h>
  62 #include <rte_malloc.h>
  63 #include <rte_mbuf.h>
  64 #include <rte_ether.h>
  65 #include <rte_ethdev.h>
  66 #include <rte_prefetch.h>
  67 #include <rte_udp.h>
  68 #include <rte_tcp.h>
  69 #include <rte_sctp.h>
  70 #include <rte_string_fns.h>
  71
  72 #include "e1000_logs.h"
  73 #include "e1000/e1000_api.h"
  74 #include "e1000_ethdev.h"
  75
  76 static inline struct rte_mbuf *
  77 rte_rxmbuf_alloc(struct rte_mempool *mp)
  78 {
  79         struct rte_mbuf *m;
  80
  81         m = __rte_mbuf_raw_alloc(mp);
  82         __rte_mbuf_sanity_check_raw(m, RTE_MBUF_PKT, 0);
  83         return (m);
  84 }
  85
  86 #define RTE_MBUF_DATA_DMA_ADDR(mb) \
  87         (uint64_t) ((mb)->buf_physaddr +                   \
  88                         (uint64_t) ((char *)((mb)->pkt.data) -     \
  89                                 (char *)(mb)->buf_addr))
  90
  91 #define RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mb) \
  92         (uint64_t) ((mb)->buf_physaddr + RTE_PKTMBUF_HEADROOM)
  93
  94 /**
  95  * Structure associated with each descriptor of the RX ring of a RX queue.
  96  */
  97 struct igb_rx_entry {
  98         struct rte_mbuf *mbuf; /**< mbuf associated with RX descriptor. */
  99 };
 100
 101 /**
 102  * Structure associated with each descriptor of the TX ring of a TX queue.
 103  */
 104 struct igb_tx_entry {
 105         struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */
 106         uint16_t next_id; /**< Index of next descriptor in ring. */
 107         uint16_t last_id; /**< Index of last scattered descriptor. */
 108 };
 109
 110 /**
 111  * Structure associated with each RX queue.
 112  */
 113 struct igb_rx_queue {
 114         struct rte_mempool  *mb_pool;   /**< mbuf pool to populate RX ring. */
 115         volatile union e1000_adv_rx_desc *rx_ring; /**< RX ring virtual address. */
 116         uint64_t            rx_ring_phys_addr; /**< RX ring DMA address. */
 117         volatile uint32_t   *rdt_reg_addr; /**< RDT register address. */
 118         volatile uint32_t   *rdh_reg_addr; /**< RDH register address. */
 119         struct igb_rx_entry *sw_ring;   /**< address of RX software ring. */
 120         struct rte_mbuf *pkt_first_seg; /**< First segment of current packet. */
 121         struct rte_mbuf *pkt_last_seg;  /**< Last segment of current packet. */
 122         uint16_t            nb_rx_desc; /**< number of RX descriptors. */
 123         uint16_t            rx_tail;    /**< current value of RDT register. */
 124         uint16_t            nb_rx_hold; /**< number of held free RX desc. */
 125         uint16_t            rx_free_thresh; /**< max free RX desc to hold. */
 126         uint16_t            queue_id;   /**< RX queue index. */
 127         uint16_t            reg_idx;    /**< RX queue register index. */
 128         uint8_t             port_id;    /**< Device port identifier. */
 129         uint8_t             pthresh;    /**< Prefetch threshold register. */
 130         uint8_t             hthresh;    /**< Host threshold register. */
 131         uint8_t             wthresh;    /**< Write-back threshold register. */
 132         uint8_t             crc_len;    /**< 0 if CRC stripped, 4 otherwise. */
 133         uint8_t             drop_en;  /**< If not 0, set SRRCTL.Drop_En. */
 134 };
 135
 136 /**
 137  * Hardware context number
 138  */
 139 enum igb_advctx_num {
 140         IGB_CTX_0    = 0, /**< CTX0    */
 141         IGB_CTX_1    = 1, /**< CTX1    */
 142         IGB_CTX_NUM  = 2, /**< CTX_NUM */
 143 };
 144
 145 /**
 146  * Strucutre to check if new context need be built
 147  */
 148 struct igb_advctx_info {
 149         uint16_t flags;           /**< ol_flags related to context build. */
 150         uint32_t cmp_mask;        /**< compare mask for vlan_macip_lens */
 151         union rte_vlan_macip vlan_macip_lens; /**< vlan, mac & ip length. */
 152 };
 153
 154 /**
 155  * Structure associated with each TX queue.
 156  */
 157 struct igb_tx_queue {
 158         volatile union e1000_adv_tx_desc *tx_ring; /**< TX ring address */
 159         uint64_t               tx_ring_phys_addr; /**< TX ring DMA address. */
 160         struct igb_tx_entry    *sw_ring; /**< virtual address of SW ring. */
 161         volatile uint32_t      *tdt_reg_addr; /**< Address of TDT register. */
 162         uint32_t               txd_type;      /**< Device-specific TXD type */
 163         uint16_t               nb_tx_desc;    /**< number of TX descriptors. */
 164         uint16_t               tx_tail; /**< Current value of TDT register. */
 165         uint16_t               tx_head;
 166         /**< Index of first used TX descriptor. */
 167         uint16_t               queue_id; /**< TX queue index. */
 168         uint16_t               reg_idx;  /**< TX queue register index. */
 169         uint8_t                port_id;  /**< Device port identifier. */
 170         uint8_t                pthresh;  /**< Prefetch threshold register. */
 171         uint8_t                hthresh;  /**< Host threshold register. */
 172         uint8_t                wthresh;  /**< Write-back threshold register. */
 173         uint32_t               ctx_curr;
 174         /**< Current used hardware descriptor. */
 175         uint32_t               ctx_start;
 176         /**< Start context position for transmit queue. */
 177         struct igb_advctx_info ctx_cache[IGB_CTX_NUM];
 178         /**< Hardware context history.*/
 179 };
 180
 181 #if 1
 182 #define RTE_PMD_USE_PREFETCH
 183 #endif
 184
 185 #ifdef RTE_PMD_USE_PREFETCH
 186 #define rte_igb_prefetch(p)     rte_prefetch0(p)
 187 #else
 188 #define rte_igb_prefetch(p)     do {} while(0)
 189 #endif
 190
 191 #ifdef RTE_PMD_PACKET_PREFETCH
 192 #define rte_packet_prefetch(p) rte_prefetch1(p)
 193 #else
 194 #define rte_packet_prefetch(p)  do {} while(0)
 195 #endif
 196
 197 /*
 198  * Macro for VMDq feature for 1 GbE NIC.
 199  */
 200 #define E1000_VMOLR_SIZE                        (8)
 201
 202 /*********************************************************************
 203  *
 204  *  TX function
 205  *
 206  **********************************************************************/
 207
 208 /*
 209  * Advanced context descriptor are almost same between igb/ixgbe
 210  * This is a separate function, looking for optimization opportunity here
 211  * Rework required to go with the pre-defined values.
 212  */
 213
 214 static inline void
 215 igbe_set_xmit_ctx(struct igb_tx_queue* txq,
 216                 volatile struct e1000_adv_tx_context_desc *ctx_txd,
 217                 uint16_t ol_flags, uint32_t vlan_macip_lens)
 218 {
 219         uint32_t type_tucmd_mlhl;
 220         uint32_t mss_l4len_idx;
 221         uint32_t ctx_idx, ctx_curr;
 222         uint32_t cmp_mask;
 223
 224         ctx_curr = txq->ctx_curr;
 225         ctx_idx = ctx_curr + txq->ctx_start;
 226
 227         cmp_mask = 0;
 228         type_tucmd_mlhl = 0;
 229
 230         if (ol_flags & PKT_TX_VLAN_PKT) {
 231                 cmp_mask |= TX_VLAN_CMP_MASK;
 232         }
 233
 234         if (ol_flags & PKT_TX_IP_CKSUM) {
 235                 type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV4;
 236                 cmp_mask |= TX_MAC_LEN_CMP_MASK;
 237         }
 238
 239         /* Specify which HW CTX to upload. */
 240         mss_l4len_idx = (ctx_idx << E1000_ADVTXD_IDX_SHIFT);
 241         switch (ol_flags & PKT_TX_L4_MASK) {
 242         case PKT_TX_UDP_CKSUM:
 243                 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_UDP |
 244                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 245                 mss_l4len_idx |= sizeof(struct udp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 246                 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
 247                 break;
 248         case PKT_TX_TCP_CKSUM:
 249                 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_TCP |
 250                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 251                 mss_l4len_idx |= sizeof(struct tcp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 252                 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
 253                 break;
 254         case PKT_TX_SCTP_CKSUM:
 255                 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_SCTP |
 256                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 257                 mss_l4len_idx |= sizeof(struct sctp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 258                 cmp_mask |= TX_MACIP_LEN_CMP_MASK;
 259                 break;
 260         default:
 261                 type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_RSV |
 262                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 263                 break;
 264         }
 265
 266         txq->ctx_cache[ctx_curr].flags           = ol_flags;
 267         txq->ctx_cache[ctx_curr].cmp_mask        = cmp_mask;
 268         txq->ctx_cache[ctx_curr].vlan_macip_lens.data =
 269                 vlan_macip_lens & cmp_mask;
 270
 271         ctx_txd->type_tucmd_mlhl = rte_cpu_to_le_32(type_tucmd_mlhl);
 272         ctx_txd->vlan_macip_lens = rte_cpu_to_le_32(vlan_macip_lens);
 273         ctx_txd->mss_l4len_idx   = rte_cpu_to_le_32(mss_l4len_idx);
 274         ctx_txd->seqnum_seed     = 0;
 275 }
 276
 277 /*
 278  * Check which hardware context can be used. Use the existing match
 279  * or create a new context descriptor.
 280  */
 281 static inline uint32_t
 282 what_advctx_update(struct igb_tx_queue *txq, uint16_t flags,
 283                 uint32_t vlan_macip_lens)
 284 {
 285         /* If match with the current context */
 286         if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
 287                 (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data ==
 288                 (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) {
 289                         return txq->ctx_curr;
 290         }
 291
 292         /* If match with the second context */
 293         txq->ctx_curr ^= 1;
 294         if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
 295                 (txq->ctx_cache[txq->ctx_curr].vlan_macip_lens.data ==
 296                 (txq->ctx_cache[txq->ctx_curr].cmp_mask & vlan_macip_lens)))) {
 297                         return txq->ctx_curr;
 298         }
 299
 300         /* Mismatch, use the previous context */
 301         return (IGB_CTX_NUM);
 302 }
 303
 304 static inline uint32_t
 305 tx_desc_cksum_flags_to_olinfo(uint16_t ol_flags)
 306 {
 307         static const uint32_t l4_olinfo[2] = {0, E1000_ADVTXD_POPTS_TXSM};
 308         static const uint32_t l3_olinfo[2] = {0, E1000_ADVTXD_POPTS_IXSM};
 309         uint32_t tmp;
 310
 311         tmp  = l4_olinfo[(ol_flags & PKT_TX_L4_MASK)  != PKT_TX_L4_NO_CKSUM];
 312         tmp |= l3_olinfo[(ol_flags & PKT_TX_IP_CKSUM) != 0];
 313         return tmp;
 314 }
 315
 316 static inline uint32_t
 317 tx_desc_vlan_flags_to_cmdtype(uint16_t ol_flags)
 318 {
 319         static uint32_t vlan_cmd[2] = {0, E1000_ADVTXD_DCMD_VLE};
 320         return vlan_cmd[(ol_flags & PKT_TX_VLAN_PKT) != 0];
 321 }
 322
 323 uint16_t
 324 eth_igb_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 325                uint16_t nb_pkts)
 326 {
 327         struct igb_tx_queue *txq;
 328         struct igb_tx_entry *sw_ring;
 329         struct igb_tx_entry *txe, *txn;
 330         volatile union e1000_adv_tx_desc *txr;
 331         volatile union e1000_adv_tx_desc *txd;
 332         struct rte_mbuf     *tx_pkt;
 333         struct rte_mbuf     *m_seg;
 334         uint64_t buf_dma_addr;
 335         uint32_t olinfo_status;
 336         uint32_t cmd_type_len;
 337         uint32_t pkt_len;
 338         uint16_t slen;
 339         uint16_t ol_flags;
 340         uint16_t tx_end;
 341         uint16_t tx_id;
 342         uint16_t tx_last;
 343         uint16_t nb_tx;
 344         uint16_t tx_ol_req;
 345         uint32_t new_ctx = 0;
 346         uint32_t ctx = 0;
 347         uint32_t vlan_macip_lens;
 348
 349         txq = tx_queue;
 350         sw_ring = txq->sw_ring;
 351         txr     = txq->tx_ring;
 352         tx_id   = txq->tx_tail;
 353         txe = &sw_ring[tx_id];
 354
 355         for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
 356                 tx_pkt = *tx_pkts++;
 357                 pkt_len = tx_pkt->pkt.pkt_len;
 358
 359                 RTE_MBUF_PREFETCH_TO_FREE(txe->mbuf);
 360
 361                 /*
 362                  * The number of descriptors that must be allocated for a
 363                  * packet is the number of segments of that packet, plus 1
 364                  * Context Descriptor for the VLAN Tag Identifier, if any.
 365                  * Determine the last TX descriptor to allocate in the TX ring
 366                  * for the packet, starting from the current position (tx_id)
 367                  * in the ring.
 368                  */
 369                 tx_last = (uint16_t) (tx_id + tx_pkt->pkt.nb_segs - 1);
 370
 371                 ol_flags = tx_pkt->ol_flags;
 372                 vlan_macip_lens = tx_pkt->pkt.vlan_macip.data;
 373                 tx_ol_req = (uint16_t)(ol_flags & PKT_TX_OFFLOAD_MASK);
 374
 375                 /* If a Context Descriptor need be built . */
 376                 if (tx_ol_req) {
 377                         ctx = what_advctx_update(txq, tx_ol_req,
 378                                 vlan_macip_lens);
 379                         /* Only allocate context descriptor if required*/
 380                         new_ctx = (ctx == IGB_CTX_NUM);
 381                         ctx = txq->ctx_curr;
 382                         tx_last = (uint16_t) (tx_last + new_ctx);
 383                 }
 384                 if (tx_last >= txq->nb_tx_desc)
 385                         tx_last = (uint16_t) (tx_last - txq->nb_tx_desc);
 386
 387                 PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u pktlen=%u"
 388                            " tx_first=%u tx_last=%u\n",
 389                            (unsigned) txq->port_id,
 390                            (unsigned) txq->queue_id,
 391                            (unsigned) pkt_len,
 392                            (unsigned) tx_id,
 393                            (unsigned) tx_last);
 394
 395                 /*
 396                  * Check if there are enough free descriptors in the TX ring
 397                  * to transmit the next packet.
 398                  * This operation is based on the two following rules:
 399                  *
 400                  *   1- Only check that the last needed TX descriptor can be
 401                  *      allocated (by construction, if that descriptor is free,
 402                  *      all intermediate ones are also free).
 403                  *
 404                  *      For this purpose, the index of the last TX descriptor
 405                  *      used for a packet (the "last descriptor" of a packet)
 406                  *      is recorded in the TX entries (the last one included)
 407                  *      that are associated with all TX descriptors allocated
 408                  *      for that packet.
 409                  *
 410                  *   2- Avoid to allocate the last free TX descriptor of the
 411                  *      ring, in order to never set the TDT register with the
 412                  *      same value stored in parallel by the NIC in the TDH
 413                  *      register, which makes the TX engine of the NIC enter
 414                  *      in a deadlock situation.
 415                  *
 416                  *      By extension, avoid to allocate a free descriptor that
 417                  *      belongs to the last set of free descriptors allocated
 418                  *      to the same packet previously transmitted.
 419                  */
 420
 421                 /*
 422                  * The "last descriptor" of the previously sent packet, if any,
 423                  * which used the last descriptor to allocate.
 424                  */
 425                 tx_end = sw_ring[tx_last].last_id;
 426
 427                 /*
 428                  * The next descriptor following that "last descriptor" in the
 429                  * ring.
 430                  */
 431                 tx_end = sw_ring[tx_end].next_id;
 432
 433                 /*
 434                  * The "last descriptor" associated with that next descriptor.
 435                  */
 436                 tx_end = sw_ring[tx_end].last_id;
 437
 438                 /*
 439                  * Check that this descriptor is free.
 440                  */
 441                 if (! (txr[tx_end].wb.status & E1000_TXD_STAT_DD)) {
 442                         if (nb_tx == 0)
 443                                 return (0);
 444                         goto end_of_tx;
 445                 }
 446
 447                 /*
 448                  * Set common flags of all TX Data Descriptors.
 449                  *
 450                  * The following bits must be set in all Data Descriptors:
 451                  *   - E1000_ADVTXD_DTYP_DATA
 452                  *   - E1000_ADVTXD_DCMD_DEXT
 453                  *
 454                  * The following bits must be set in the first Data Descriptor
 455                  * and are ignored in the other ones:
 456                  *   - E1000_ADVTXD_DCMD_IFCS
 457                  *   - E1000_ADVTXD_MAC_1588
 458                  *   - E1000_ADVTXD_DCMD_VLE
 459                  *
 460                  * The following bits must only be set in the last Data
 461                  * Descriptor:
 462                  *   - E1000_TXD_CMD_EOP
 463                  *
 464                  * The following bits can be set in any Data Descriptor, but
 465                  * are only set in the last Data Descriptor:
 466                  *   - E1000_TXD_CMD_RS
 467                  */
 468                 cmd_type_len = txq->txd_type |
 469                         E1000_ADVTXD_DCMD_IFCS | E1000_ADVTXD_DCMD_DEXT;
 470                 olinfo_status = (pkt_len << E1000_ADVTXD_PAYLEN_SHIFT);
 471 #if defined(RTE_LIBRTE_IEEE1588)
 472                 if (ol_flags & PKT_TX_IEEE1588_TMST)
 473                         cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP;
 474 #endif
 475                 if (tx_ol_req) {
 476                         /* Setup TX Advanced context descriptor if required */
 477                         if (new_ctx) {
 478                                 volatile struct e1000_adv_tx_context_desc *
 479                                     ctx_txd;
 480
 481                                 ctx_txd = (volatile struct
 482                                     e1000_adv_tx_context_desc *)
 483                                     &txr[tx_id];
 484
 485                                 txn = &sw_ring[txe->next_id];
 486                                 RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
 487
 488                                 if (txe->mbuf != NULL) {
 489                                         rte_pktmbuf_free_seg(txe->mbuf);
 490                                         txe->mbuf = NULL;
 491                                 }
 492
 493                                 igbe_set_xmit_ctx(txq, ctx_txd, tx_ol_req,
 494                                     vlan_macip_lens);
 495
 496                                 txe->last_id = tx_last;
 497                                 tx_id = txe->next_id;
 498                                 txe = txn;
 499                         }
 500
 501                         /* Setup the TX Advanced Data Descriptor */
 502                         cmd_type_len  |= tx_desc_vlan_flags_to_cmdtype(ol_flags);
 503                         olinfo_status |= tx_desc_cksum_flags_to_olinfo(ol_flags);
 504                         olinfo_status |= (ctx << E1000_ADVTXD_IDX_SHIFT);
 505                 }
 506
 507                 m_seg = tx_pkt;
 508                 do {
 509                         txn = &sw_ring[txe->next_id];
 510                         txd = &txr[tx_id];
 511
 512                         if (txe->mbuf != NULL)
 513                                 rte_pktmbuf_free_seg(txe->mbuf);
 514                         txe->mbuf = m_seg;
 515
 516                         /*
 517                          * Set up transmit descriptor.
 518                          */
 519                         slen = (uint16_t) m_seg->pkt.data_len;
 520                         buf_dma_addr = RTE_MBUF_DATA_DMA_ADDR(m_seg);
 521                         txd->read.buffer_addr =
 522                                 rte_cpu_to_le_64(buf_dma_addr);
 523                         txd->read.cmd_type_len =
 524                                 rte_cpu_to_le_32(cmd_type_len | slen);
 525                         txd->read.olinfo_status =
 526                                 rte_cpu_to_le_32(olinfo_status);
 527                         txe->last_id = tx_last;
 528                         tx_id = txe->next_id;
 529                         txe = txn;
 530                         m_seg = m_seg->pkt.next;
 531                 } while (m_seg != NULL);
 532
 533                 /*
 534                  * The last packet data descriptor needs End Of Packet (EOP)
 535                  * and Report Status (RS).
 536                  */
 537                 txd->read.cmd_type_len |=
 538                         rte_cpu_to_le_32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS);
 539         }
 540  end_of_tx:
 541         rte_wmb();
 542
 543         /*
 544          * Set the Transmit Descriptor Tail (TDT).
 545          */
 546         E1000_PCI_REG_WRITE(txq->tdt_reg_addr, tx_id);
 547         PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u tx_tail=%u nb_tx=%u",
 548                    (unsigned) txq->port_id, (unsigned) txq->queue_id,
 549                    (unsigned) tx_id, (unsigned) nb_tx);
 550         txq->tx_tail = tx_id;
 551
 552         return (nb_tx);
 553 }
 554
 555 /*********************************************************************
 556  *
 557  *  RX functions
 558  *
 559  **********************************************************************/
 560 static inline uint16_t
 561 rx_desc_hlen_type_rss_to_pkt_flags(uint32_t hl_tp_rs)
 562 {
 563         uint16_t pkt_flags;
 564
 565         static uint16_t ip_pkt_types_map[16] = {
 566                 0, PKT_RX_IPV4_HDR, PKT_RX_IPV4_HDR_EXT, PKT_RX_IPV4_HDR_EXT,
 567                 PKT_RX_IPV6_HDR, 0, 0, 0,
 568                 PKT_RX_IPV6_HDR_EXT, 0, 0, 0,
 569                 PKT_RX_IPV6_HDR_EXT, 0, 0, 0,
 570         };
 571
 572 #if defined(RTE_LIBRTE_IEEE1588)
 573         static uint32_t ip_pkt_etqf_map[8] = {
 574                 0, 0, 0, PKT_RX_IEEE1588_PTP,
 575                 0, 0, 0, 0,
 576         };
 577
 578         pkt_flags = (uint16_t)((hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ?
 579                                 ip_pkt_etqf_map[(hl_tp_rs >> 4) & 0x07] :
 580                                 ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]);
 581 #else
 582         pkt_flags = (uint16_t)((hl_tp_rs & E1000_RXDADV_PKTTYPE_ETQF) ? 0 :
 583                                 ip_pkt_types_map[(hl_tp_rs >> 4) & 0x0F]);
 584 #endif
 585         return (uint16_t)(pkt_flags | (((hl_tp_rs & 0x0F) == 0) ?
 586                                                 0 : PKT_RX_RSS_HASH));
 587 }
 588
 589 static inline uint16_t
 590 rx_desc_status_to_pkt_flags(uint32_t rx_status)
 591 {
 592         uint16_t pkt_flags;
 593
 594         /* Check if VLAN present */
 595         pkt_flags = (uint16_t)((rx_status & E1000_RXD_STAT_VP) ?
 596                                                 PKT_RX_VLAN_PKT : 0);
 597
 598 #if defined(RTE_LIBRTE_IEEE1588)
 599         if (rx_status & E1000_RXD_STAT_TMST)
 600                 pkt_flags = (uint16_t)(pkt_flags | PKT_RX_IEEE1588_TMST);
 601 #endif
 602         return pkt_flags;
 603 }
 604
 605 static inline uint16_t
 606 rx_desc_error_to_pkt_flags(uint32_t rx_status)
 607 {
 608         /*
 609          * Bit 30: IPE, IPv4 checksum error
 610          * Bit 29: L4I, L4I integrity error
 611          */
 612
 613         static uint16_t error_to_pkt_flags_map[4] = {
 614                 0,  PKT_RX_L4_CKSUM_BAD, PKT_RX_IP_CKSUM_BAD,
 615                 PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD
 616         };
 617         return error_to_pkt_flags_map[(rx_status >>
 618                 E1000_RXD_ERR_CKSUM_BIT) & E1000_RXD_ERR_CKSUM_MSK];
 619 }
 620
 621 uint16_t
 622 eth_igb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 623                uint16_t nb_pkts)
 624 {
 625         struct igb_rx_queue *rxq;
 626         volatile union e1000_adv_rx_desc *rx_ring;
 627         volatile union e1000_adv_rx_desc *rxdp;
 628         struct igb_rx_entry *sw_ring;
 629         struct igb_rx_entry *rxe;
 630         struct rte_mbuf *rxm;
 631         struct rte_mbuf *nmb;
 632         union e1000_adv_rx_desc rxd;
 633         uint64_t dma_addr;
 634         uint32_t staterr;
 635         uint32_t hlen_type_rss;
 636         uint16_t pkt_len;
 637         uint16_t rx_id;
 638         uint16_t nb_rx;
 639         uint16_t nb_hold;
 640         uint16_t pkt_flags;
 641
 642         nb_rx = 0;
 643         nb_hold = 0;
 644         rxq = rx_queue;
 645         rx_id = rxq->rx_tail;
 646         rx_ring = rxq->rx_ring;
 647         sw_ring = rxq->sw_ring;
 648         while (nb_rx < nb_pkts) {
 649                 /*
 650                  * The order of operations here is important as the DD status
 651                  * bit must not be read after any other descriptor fields.
 652                  * rx_ring and rxdp are pointing to volatile data so the order
 653                  * of accesses cannot be reordered by the compiler. If they were
 654                  * not volatile, they could be reordered which could lead to
 655                  * using invalid descriptor fields when read from rxd.
 656                  */
 657                 rxdp = &rx_ring[rx_id];
 658                 staterr = rxdp->wb.upper.status_error;
 659                 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
 660                         break;
 661                 rxd = *rxdp;
 662
 663                 /*
 664                  * End of packet.
 665                  *
 666                  * If the E1000_RXD_STAT_EOP flag is not set, the RX packet is
 667                  * likely to be invalid and to be dropped by the various
 668                  * validation checks performed by the network stack.
 669                  *
 670                  * Allocate a new mbuf to replenish the RX ring descriptor.
 671                  * If the allocation fails:
 672                  *    - arrange for that RX descriptor to be the first one
 673                  *      being parsed the next time the receive function is
 674                  *      invoked [on the same queue].
 675                  *
 676                  *    - Stop parsing the RX ring and return immediately.
 677                  *
 678                  * This policy do not drop the packet received in the RX
 679                  * descriptor for which the allocation of a new mbuf failed.
 680                  * Thus, it allows that packet to be later retrieved if
 681                  * mbuf have been freed in the mean time.
 682                  * As a side effect, holding RX descriptors instead of
 683                  * systematically giving them back to the NIC may lead to
 684                  * RX ring exhaustion situations.
 685                  * However, the NIC can gracefully prevent such situations
 686                  * to happen by sending specific "back-pressure" flow control
 687                  * frames to its peer(s).
 688                  */
 689                 PMD_RX_LOG(DEBUG, "\nport_id=%u queue_id=%u rx_id=%u "
 690                            "staterr=0x%x pkt_len=%u\n",
 691                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
 692                            (unsigned) rx_id, (unsigned) staterr,
 693                            (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
 694
 695                 nmb = rte_rxmbuf_alloc(rxq->mb_pool);
 696                 if (nmb == NULL) {
 697                         PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
 698                                    "queue_id=%u\n", (unsigned) rxq->port_id,
 699                                    (unsigned) rxq->queue_id);
 700                         rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
 701                         break;
 702                 }
 703
 704                 nb_hold++;
 705                 rxe = &sw_ring[rx_id];
 706                 rx_id++;
 707                 if (rx_id == rxq->nb_rx_desc)
 708                         rx_id = 0;
 709
 710                 /* Prefetch next mbuf while processing current one. */
 711                 rte_igb_prefetch(sw_ring[rx_id].mbuf);
 712
 713                 /*
 714                  * When next RX descriptor is on a cache-line boundary,
 715                  * prefetch the next 4 RX descriptors and the next 8 pointers
 716                  * to mbufs.
 717                  */
 718                 if ((rx_id & 0x3) == 0) {
 719                         rte_igb_prefetch(&rx_ring[rx_id]);
 720                         rte_igb_prefetch(&sw_ring[rx_id]);
 721                 }
 722
 723                 rxm = rxe->mbuf;
 724                 rxe->mbuf = nmb;
 725                 dma_addr =
 726                         rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb));
 727                 rxdp->read.hdr_addr = dma_addr;
 728                 rxdp->read.pkt_addr = dma_addr;
 729
 730                 /*
 731                  * Initialize the returned mbuf.
 732                  * 1) setup generic mbuf fields:
 733                  *    - number of segments,
 734                  *    - next segment,
 735                  *    - packet length,
 736                  *    - RX port identifier.
 737                  * 2) integrate hardware offload data, if any:
 738                  *    - RSS flag & hash,
 739                  *    - IP checksum flag,
 740                  *    - VLAN TCI, if any,
 741                  *    - error flags.
 742                  */
 743                 pkt_len = (uint16_t) (rte_le_to_cpu_16(rxd.wb.upper.length) -
 744                                       rxq->crc_len);
 745                 rxm->pkt.data = (char*) rxm->buf_addr + RTE_PKTMBUF_HEADROOM;
 746                 rte_packet_prefetch(rxm->pkt.data);
 747                 rxm->pkt.nb_segs = 1;
 748                 rxm->pkt.next = NULL;
 749                 rxm->pkt.pkt_len = pkt_len;
 750                 rxm->pkt.data_len = pkt_len;
 751                 rxm->pkt.in_port = rxq->port_id;
 752
 753                 rxm->pkt.hash.rss = rxd.wb.lower.hi_dword.rss;
 754                 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
 755                 /* Only valid if PKT_RX_VLAN_PKT set in pkt_flags */
 756                 rxm->pkt.vlan_macip.f.vlan_tci =
 757                         rte_le_to_cpu_16(rxd.wb.upper.vlan);
 758
 759                 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss);
 760                 pkt_flags = (uint16_t)(pkt_flags |
 761                                 rx_desc_status_to_pkt_flags(staterr));
 762                 pkt_flags = (uint16_t)(pkt_flags |
 763                                 rx_desc_error_to_pkt_flags(staterr));
 764                 rxm->ol_flags = pkt_flags;
 765
 766                 /*
 767                  * Store the mbuf address into the next entry of the array
 768                  * of returned packets.
 769                  */
 770                 rx_pkts[nb_rx++] = rxm;
 771         }
 772         rxq->rx_tail = rx_id;
 773
 774         /*
 775          * If the number of free RX descriptors is greater than the RX free
 776          * threshold of the queue, advance the Receive Descriptor Tail (RDT)
 777          * register.
 778          * Update the RDT with the value of the last processed RX descriptor
 779          * minus 1, to guarantee that the RDT register is never equal to the
 780          * RDH register, which creates a "full" ring situtation from the
 781          * hardware point of view...
 782          */
 783         nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
 784         if (nb_hold > rxq->rx_free_thresh) {
 785                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
 786                            "nb_hold=%u nb_rx=%u\n",
 787                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
 788                            (unsigned) rx_id, (unsigned) nb_hold,
 789                            (unsigned) nb_rx);
 790                 rx_id = (uint16_t) ((rx_id == 0) ?
 791                                      (rxq->nb_rx_desc - 1) : (rx_id - 1));
 792                 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
 793                 nb_hold = 0;
 794         }
 795         rxq->nb_rx_hold = nb_hold;
 796         return (nb_rx);
 797 }
 798
 799 uint16_t
 800 eth_igb_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 801                          uint16_t nb_pkts)
 802 {
 803         struct igb_rx_queue *rxq;
 804         volatile union e1000_adv_rx_desc *rx_ring;
 805         volatile union e1000_adv_rx_desc *rxdp;
 806         struct igb_rx_entry *sw_ring;
 807         struct igb_rx_entry *rxe;
 808         struct rte_mbuf *first_seg;
 809         struct rte_mbuf *last_seg;
 810         struct rte_mbuf *rxm;
 811         struct rte_mbuf *nmb;
 812         union e1000_adv_rx_desc rxd;
 813         uint64_t dma; /* Physical address of mbuf data buffer */
 814         uint32_t staterr;
 815         uint32_t hlen_type_rss;
 816         uint16_t rx_id;
 817         uint16_t nb_rx;
 818         uint16_t nb_hold;
 819         uint16_t data_len;
 820         uint16_t pkt_flags;
 821
 822         nb_rx = 0;
 823         nb_hold = 0;
 824         rxq = rx_queue;
 825         rx_id = rxq->rx_tail;
 826         rx_ring = rxq->rx_ring;
 827         sw_ring = rxq->sw_ring;
 828
 829         /*
 830          * Retrieve RX context of current packet, if any.
 831          */
 832         first_seg = rxq->pkt_first_seg;
 833         last_seg = rxq->pkt_last_seg;
 834
 835         while (nb_rx < nb_pkts) {
 836         next_desc:
 837                 /*
 838                  * The order of operations here is important as the DD status
 839                  * bit must not be read after any other descriptor fields.
 840                  * rx_ring and rxdp are pointing to volatile data so the order
 841                  * of accesses cannot be reordered by the compiler. If they were
 842                  * not volatile, they could be reordered which could lead to
 843                  * using invalid descriptor fields when read from rxd.
 844                  */
 845                 rxdp = &rx_ring[rx_id];
 846                 staterr = rxdp->wb.upper.status_error;
 847                 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
 848                         break;
 849                 rxd = *rxdp;
 850
 851                 /*
 852                  * Descriptor done.
 853                  *
 854                  * Allocate a new mbuf to replenish the RX ring descriptor.
 855                  * If the allocation fails:
 856                  *    - arrange for that RX descriptor to be the first one
 857                  *      being parsed the next time the receive function is
 858                  *      invoked [on the same queue].
 859                  *
 860                  *    - Stop parsing the RX ring and return immediately.
 861                  *
 862                  * This policy does not drop the packet received in the RX
 863                  * descriptor for which the allocation of a new mbuf failed.
 864                  * Thus, it allows that packet to be later retrieved if
 865                  * mbuf have been freed in the mean time.
 866                  * As a side effect, holding RX descriptors instead of
 867                  * systematically giving them back to the NIC may lead to
 868                  * RX ring exhaustion situations.
 869                  * However, the NIC can gracefully prevent such situations
 870                  * to happen by sending specific "back-pressure" flow control
 871                  * frames to its peer(s).
 872                  */
 873                 PMD_RX_LOG(DEBUG, "\nport_id=%u queue_id=%u rx_id=%u "
 874                            "staterr=0x%x data_len=%u\n",
 875                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
 876                            (unsigned) rx_id, (unsigned) staterr,
 877                            (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
 878
 879                 nmb = rte_rxmbuf_alloc(rxq->mb_pool);
 880                 if (nmb == NULL) {
 881                         PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
 882                                    "queue_id=%u\n", (unsigned) rxq->port_id,
 883                                    (unsigned) rxq->queue_id);
 884                         rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
 885                         break;
 886                 }
 887
 888                 nb_hold++;
 889                 rxe = &sw_ring[rx_id];
 890                 rx_id++;
 891                 if (rx_id == rxq->nb_rx_desc)
 892                         rx_id = 0;
 893
 894                 /* Prefetch next mbuf while processing current one. */
 895                 rte_igb_prefetch(sw_ring[rx_id].mbuf);
 896
 897                 /*
 898                  * When next RX descriptor is on a cache-line boundary,
 899                  * prefetch the next 4 RX descriptors and the next 8 pointers
 900                  * to mbufs.
 901                  */
 902                 if ((rx_id & 0x3) == 0) {
 903                         rte_igb_prefetch(&rx_ring[rx_id]);
 904                         rte_igb_prefetch(&sw_ring[rx_id]);
 905                 }
 906
 907                 /*
 908                  * Update RX descriptor with the physical address of the new
 909                  * data buffer of the new allocated mbuf.
 910                  */
 911                 rxm = rxe->mbuf;
 912                 rxe->mbuf = nmb;
 913                 dma = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb));
 914                 rxdp->read.pkt_addr = dma;
 915                 rxdp->read.hdr_addr = dma;
 916
 917                 /*
 918                  * Set data length & data buffer address of mbuf.
 919                  */
 920                 data_len = rte_le_to_cpu_16(rxd.wb.upper.length);
 921                 rxm->pkt.data_len = data_len;
 922                 rxm->pkt.data = (char*) rxm->buf_addr + RTE_PKTMBUF_HEADROOM;
 923
 924                 /*
 925                  * If this is the first buffer of the received packet,
 926                  * set the pointer to the first mbuf of the packet and
 927                  * initialize its context.
 928                  * Otherwise, update the total length and the number of segments
 929                  * of the current scattered packet, and update the pointer to
 930                  * the last mbuf of the current packet.
 931                  */
 932                 if (first_seg == NULL) {
 933                         first_seg = rxm;
 934                         first_seg->pkt.pkt_len = data_len;
 935                         first_seg->pkt.nb_segs = 1;
 936                 } else {
 937                         first_seg->pkt.pkt_len += data_len;
 938                         first_seg->pkt.nb_segs++;
 939                         last_seg->pkt.next = rxm;
 940                 }
 941
 942                 /*
 943                  * If this is not the last buffer of the received packet,
 944                  * update the pointer to the last mbuf of the current scattered
 945                  * packet and continue to parse the RX ring.
 946                  */
 947                 if (! (staterr & E1000_RXD_STAT_EOP)) {
 948                         last_seg = rxm;
 949                         goto next_desc;
 950                 }
 951
 952                 /*
 953                  * This is the last buffer of the received packet.
 954                  * If the CRC is not stripped by the hardware:
 955                  *   - Subtract the CRC length from the total packet length.
 956                  *   - If the last buffer only contains the whole CRC or a part
 957                  *     of it, free the mbuf associated to the last buffer.
 958                  *     If part of the CRC is also contained in the previous
 959                  *     mbuf, subtract the length of that CRC part from the
 960                  *     data length of the previous mbuf.
 961                  */
 962                 rxm->pkt.next = NULL;
 963                 if (unlikely(rxq->crc_len > 0)) {
 964                         first_seg->pkt.pkt_len -= ETHER_CRC_LEN;
 965                         if (data_len <= ETHER_CRC_LEN) {
 966                                 rte_pktmbuf_free_seg(rxm);
 967                                 first_seg->pkt.nb_segs--;
 968                                 last_seg->pkt.data_len = (uint16_t)
 969                                         (last_seg->pkt.data_len -
 970                                          (ETHER_CRC_LEN - data_len));
 971                                 last_seg->pkt.next = NULL;
 972                         } else
 973                                 rxm->pkt.data_len =
 974                                         (uint16_t) (data_len - ETHER_CRC_LEN);
 975                 }
 976
 977                 /*
 978                  * Initialize the first mbuf of the returned packet:
 979                  *    - RX port identifier,
 980                  *    - hardware offload data, if any:
 981                  *      - RSS flag & hash,
 982                  *      - IP checksum flag,
 983                  *      - VLAN TCI, if any,
 984                  *      - error flags.
 985                  */
 986                 first_seg->pkt.in_port = rxq->port_id;
 987                 first_seg->pkt.hash.rss = rxd.wb.lower.hi_dword.rss;
 988
 989                 /*
 990                  * The vlan_tci field is only valid when PKT_RX_VLAN_PKT is
 991                  * set in the pkt_flags field.
 992                  */
 993                 first_seg->pkt.vlan_macip.f.vlan_tci =
 994                         rte_le_to_cpu_16(rxd.wb.upper.vlan);
 995                 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
 996                 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(hlen_type_rss);
 997                 pkt_flags = (uint16_t)(pkt_flags |
 998                                 rx_desc_status_to_pkt_flags(staterr));
 999                 pkt_flags = (uint16_t)(pkt_flags |
1000                                 rx_desc_error_to_pkt_flags(staterr));
1001                 first_seg->ol_flags = pkt_flags;
1002
1003                 /* Prefetch data of first segment, if configured to do so. */
1004                 rte_packet_prefetch(first_seg->pkt.data);
1005
1006                 /*
1007                  * Store the mbuf address into the next entry of the array
1008                  * of returned packets.
1009                  */
1010                 rx_pkts[nb_rx++] = first_seg;
1011
1012                 /*
1013                  * Setup receipt context for a new packet.
1014                  */
1015                 first_seg = NULL;
1016         }
1017
1018         /*
1019          * Record index of the next RX descriptor to probe.
1020          */
1021         rxq->rx_tail = rx_id;
1022
1023         /*
1024          * Save receive context.
1025          */
1026         rxq->pkt_first_seg = first_seg;
1027         rxq->pkt_last_seg = last_seg;
1028
1029         /*
1030          * If the number of free RX descriptors is greater than the RX free
1031          * threshold of the queue, advance the Receive Descriptor Tail (RDT)
1032          * register.
1033          * Update the RDT with the value of the last processed RX descriptor
1034          * minus 1, to guarantee that the RDT register is never equal to the
1035          * RDH register, which creates a "full" ring situtation from the
1036          * hardware point of view...
1037          */
1038         nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
1039         if (nb_hold > rxq->rx_free_thresh) {
1040                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
1041                            "nb_hold=%u nb_rx=%u\n",
1042                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
1043                            (unsigned) rx_id, (unsigned) nb_hold,
1044                            (unsigned) nb_rx);
1045                 rx_id = (uint16_t) ((rx_id == 0) ?
1046                                      (rxq->nb_rx_desc - 1) : (rx_id - 1));
1047                 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
1048                 nb_hold = 0;
1049         }
1050         rxq->nb_rx_hold = nb_hold;
1051         return (nb_rx);
1052 }
1053
1054 /*
1055  * Rings setup and release.
1056  *
1057  * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
1058  * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary.
1059  * This will also optimize cache line size effect.
1060  * H/W supports up to cache line size 128.
1061  */
1062 #define IGB_ALIGN 128
1063
1064 /*
1065  * Maximum number of Ring Descriptors.
1066  *
1067  * Since RDLEN/TDLEN should be multiple of 128bytes, the number of ring
1068  * desscriptors should meet the following condition:
1069  *      (num_ring_desc * sizeof(struct e1000_rx/tx_desc)) % 128 == 0
1070  */
1071 #define IGB_MIN_RING_DESC 32
1072 #define IGB_MAX_RING_DESC 4096
1073
1074 static const struct rte_memzone *
1075 ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
1076                       uint16_t queue_id, uint32_t ring_size, int socket_id)
1077 {
1078         char z_name[RTE_MEMZONE_NAMESIZE];
1079         const struct rte_memzone *mz;
1080
1081         rte_snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
1082                         dev->driver->pci_drv.name, ring_name,
1083                                 dev->data->port_id, queue_id);
1084         mz = rte_memzone_lookup(z_name);
1085         if (mz)
1086                 return mz;
1087
1088 #ifdef RTE_LIBRTE_XEN_DOM0
1089         return rte_memzone_reserve_bounded(z_name, ring_size,
1090                         socket_id, 0, IGB_ALIGN, RTE_PGSIZE_2M);
1091 #else
1092         return rte_memzone_reserve_aligned(z_name, ring_size,
1093                         socket_id, 0, IGB_ALIGN);
1094 #endif
1095 }
1096
1097 static void
1098 igb_tx_queue_release_mbufs(struct igb_tx_queue *txq)
1099 {
1100         unsigned i;
1101
1102         if (txq->sw_ring != NULL) {
1103                 for (i = 0; i < txq->nb_tx_desc; i++) {
1104                         if (txq->sw_ring[i].mbuf != NULL) {
1105                                 rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
1106                                 txq->sw_ring[i].mbuf = NULL;
1107                         }
1108                 }
1109         }
1110 }
1111
1112 static void
1113 igb_tx_queue_release(struct igb_tx_queue *txq)
1114 {
1115         if (txq != NULL) {
1116                 igb_tx_queue_release_mbufs(txq);
1117                 rte_free(txq->sw_ring);
1118                 rte_free(txq);
1119         }
1120 }
1121
1122 void
1123 eth_igb_tx_queue_release(void *txq)
1124 {
1125         igb_tx_queue_release(txq);
1126 }
1127
1128 static void
1129 igb_reset_tx_queue_stat(struct igb_tx_queue *txq)
1130 {
1131         txq->tx_head = 0;
1132         txq->tx_tail = 0;
1133         txq->ctx_curr = 0;
1134         memset((void*)&txq->ctx_cache, 0,
1135                 IGB_CTX_NUM * sizeof(struct igb_advctx_info));
1136 }
1137
1138 static void
1139 igb_reset_tx_queue(struct igb_tx_queue *txq, struct rte_eth_dev *dev)
1140 {
1141         static const union e1000_adv_tx_desc zeroed_desc = { .read = {
1142                         .buffer_addr = 0}};
1143         struct igb_tx_entry *txe = txq->sw_ring;
1144         uint16_t i, prev;
1145         struct e1000_hw *hw;
1146
1147         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1148         /* Zero out HW ring memory */
1149         for (i = 0; i < txq->nb_tx_desc; i++) {
1150                 txq->tx_ring[i] = zeroed_desc;
1151         }
1152
1153         /* Initialize ring entries */
1154         prev = (uint16_t)(txq->nb_tx_desc - 1);
1155         for (i = 0; i < txq->nb_tx_desc; i++) {
1156                 volatile union e1000_adv_tx_desc *txd = &(txq->tx_ring[i]);
1157
1158                 txd->wb.status = E1000_TXD_STAT_DD;
1159                 txe[i].mbuf = NULL;
1160                 txe[i].last_id = i;
1161                 txe[prev].next_id = i;
1162                 prev = i;
1163         }
1164
1165         txq->txd_type = E1000_ADVTXD_DTYP_DATA;
1166         /* 82575 specific, each tx queue will use 2 hw contexts */
1167         if (hw->mac.type == e1000_82575)
1168                 txq->ctx_start = txq->queue_id * IGB_CTX_NUM;
1169
1170         igb_reset_tx_queue_stat(txq);
1171 }
1172
1173 int
1174 eth_igb_tx_queue_setup(struct rte_eth_dev *dev,
1175                          uint16_t queue_idx,
1176                          uint16_t nb_desc,
1177                          unsigned int socket_id,
1178                          const struct rte_eth_txconf *tx_conf)
1179 {
1180         const struct rte_memzone *tz;
1181         struct igb_tx_queue *txq;
1182         struct e1000_hw     *hw;
1183         uint32_t size;
1184
1185         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1186
1187         /*
1188          * Validate number of transmit descriptors.
1189          * It must not exceed hardware maximum, and must be multiple
1190          * of IGB_ALIGN.
1191          */
1192         if (((nb_desc * sizeof(union e1000_adv_tx_desc)) % IGB_ALIGN) != 0 ||
1193             (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) {
1194                 return -EINVAL;
1195         }
1196
1197         /*
1198          * The tx_free_thresh and tx_rs_thresh values are not used in the 1G
1199          * driver.
1200          */
1201         if (tx_conf->tx_free_thresh != 0)
1202                 RTE_LOG(WARNING, PMD,
1203                         "The tx_free_thresh parameter is not "
1204                         "used for the 1G driver.\n");
1205         if (tx_conf->tx_rs_thresh != 0)
1206                 RTE_LOG(WARNING, PMD,
1207                         "The tx_rs_thresh parameter is not "
1208                         "used for the 1G driver.\n");
1209         if (tx_conf->tx_thresh.wthresh == 0)
1210                 RTE_LOG(WARNING, PMD,
1211                         "To improve 1G driver performance, consider setting "
1212                         "the TX WTHRESH value to 4, 8, or 16.\n");
1213
1214         /* Free memory prior to re-allocation if needed */
1215         if (dev->data->tx_queues[queue_idx] != NULL)
1216                 igb_tx_queue_release(dev->data->tx_queues[queue_idx]);
1217
1218         /* First allocate the tx queue data structure */
1219         txq = rte_zmalloc("ethdev TX queue", sizeof(struct igb_tx_queue),
1220                                                         CACHE_LINE_SIZE);
1221         if (txq == NULL)
1222                 return (-ENOMEM);
1223
1224         /*
1225          * Allocate TX ring hardware descriptors. A memzone large enough to
1226          * handle the maximum ring size is allocated in order to allow for
1227          * resizing in later calls to the queue setup function.
1228          */
1229         size = sizeof(union e1000_adv_tx_desc) * IGB_MAX_RING_DESC;
1230         tz = ring_dma_zone_reserve(dev, "tx_ring", queue_idx,
1231                                         size, socket_id);
1232         if (tz == NULL) {
1233                 igb_tx_queue_release(txq);
1234                 return (-ENOMEM);
1235         }
1236
1237         txq->nb_tx_desc = nb_desc;
1238         txq->pthresh = tx_conf->tx_thresh.pthresh;
1239         txq->hthresh = tx_conf->tx_thresh.hthresh;
1240         txq->wthresh = tx_conf->tx_thresh.wthresh;
1241         if (txq->wthresh > 0 && hw->mac.type == e1000_82576)
1242                 txq->wthresh = 1;
1243         txq->queue_id = queue_idx;
1244         txq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1245                 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1246         txq->port_id = dev->data->port_id;
1247
1248         txq->tdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_TDT(txq->reg_idx));
1249 #ifndef RTE_LIBRTE_XEN_DOM0
1250         txq->tx_ring_phys_addr = (uint64_t) tz->phys_addr;
1251 #else
1252         txq->tx_ring_phys_addr = rte_mem_phy2mch(tz->memseg_id, tz->phys_addr);
1253 #endif
1254          txq->tx_ring = (union e1000_adv_tx_desc *) tz->addr;
1255         /* Allocate software ring */
1256         txq->sw_ring = rte_zmalloc("txq->sw_ring",
1257                                    sizeof(struct igb_tx_entry) * nb_desc,
1258                                    CACHE_LINE_SIZE);
1259         if (txq->sw_ring == NULL) {
1260                 igb_tx_queue_release(txq);
1261                 return (-ENOMEM);
1262         }
1263         PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64"\n",
1264                      txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr);
1265
1266         igb_reset_tx_queue(txq, dev);
1267         dev->tx_pkt_burst = eth_igb_xmit_pkts;
1268         dev->data->tx_queues[queue_idx] = txq;
1269
1270         return (0);
1271 }
1272
1273 static void
1274 igb_rx_queue_release_mbufs(struct igb_rx_queue *rxq)
1275 {
1276         unsigned i;
1277
1278         if (rxq->sw_ring != NULL) {
1279                 for (i = 0; i < rxq->nb_rx_desc; i++) {
1280                         if (rxq->sw_ring[i].mbuf != NULL) {
1281                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
1282                                 rxq->sw_ring[i].mbuf = NULL;
1283                         }
1284                 }
1285         }
1286 }
1287
1288 static void
1289 igb_rx_queue_release(struct igb_rx_queue *rxq)
1290 {
1291         if (rxq != NULL) {
1292                 igb_rx_queue_release_mbufs(rxq);
1293                 rte_free(rxq->sw_ring);
1294                 rte_free(rxq);
1295         }
1296 }
1297
1298 void
1299 eth_igb_rx_queue_release(void *rxq)
1300 {
1301         igb_rx_queue_release(rxq);
1302 }
1303
1304 static void
1305 igb_reset_rx_queue(struct igb_rx_queue *rxq)
1306 {
1307         static const union e1000_adv_rx_desc zeroed_desc = { .read = {
1308                         .pkt_addr = 0}};
1309         unsigned i;
1310
1311         /* Zero out HW ring memory */
1312         for (i = 0; i < rxq->nb_rx_desc; i++) {
1313                 rxq->rx_ring[i] = zeroed_desc;
1314         }
1315
1316         rxq->rx_tail = 0;
1317         rxq->pkt_first_seg = NULL;
1318         rxq->pkt_last_seg = NULL;
1319 }
1320
1321 int
1322 eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
1323                          uint16_t queue_idx,
1324                          uint16_t nb_desc,
1325                          unsigned int socket_id,
1326                          const struct rte_eth_rxconf *rx_conf,
1327                          struct rte_mempool *mp)
1328 {
1329         const struct rte_memzone *rz;
1330         struct igb_rx_queue *rxq;
1331         struct e1000_hw     *hw;
1332         unsigned int size;
1333
1334         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1335
1336         /*
1337          * Validate number of receive descriptors.
1338          * It must not exceed hardware maximum, and must be multiple
1339          * of IGB_ALIGN.
1340          */
1341         if (((nb_desc * sizeof(union e1000_adv_rx_desc)) % IGB_ALIGN) != 0 ||
1342             (nb_desc > IGB_MAX_RING_DESC) || (nb_desc < IGB_MIN_RING_DESC)) {
1343                 return (-EINVAL);
1344         }
1345
1346         /* Free memory prior to re-allocation if needed */
1347         if (dev->data->rx_queues[queue_idx] != NULL) {
1348                 igb_rx_queue_release(dev->data->rx_queues[queue_idx]);
1349                 dev->data->rx_queues[queue_idx] = NULL;
1350         }
1351
1352         /* First allocate the RX queue data structure. */
1353         rxq = rte_zmalloc("ethdev RX queue", sizeof(struct igb_rx_queue),
1354                           CACHE_LINE_SIZE);
1355         if (rxq == NULL)
1356                 return (-ENOMEM);
1357         rxq->mb_pool = mp;
1358         rxq->nb_rx_desc = nb_desc;
1359         rxq->pthresh = rx_conf->rx_thresh.pthresh;
1360         rxq->hthresh = rx_conf->rx_thresh.hthresh;
1361         rxq->wthresh = rx_conf->rx_thresh.wthresh;
1362         if (rxq->wthresh > 0 && hw->mac.type == e1000_82576)
1363                 rxq->wthresh = 1;
1364         rxq->drop_en = rx_conf->rx_drop_en;
1365         rxq->rx_free_thresh = rx_conf->rx_free_thresh;
1366         rxq->queue_id = queue_idx;
1367         rxq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1368                 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1369         rxq->port_id = dev->data->port_id;
1370         rxq->crc_len = (uint8_t) ((dev->data->dev_conf.rxmode.hw_strip_crc) ? 0 :
1371                                   ETHER_CRC_LEN);
1372
1373         /*
1374          *  Allocate RX ring hardware descriptors. A memzone large enough to
1375          *  handle the maximum ring size is allocated in order to allow for
1376          *  resizing in later calls to the queue setup function.
1377          */
1378         size = sizeof(union e1000_adv_rx_desc) * IGB_MAX_RING_DESC;
1379         rz = ring_dma_zone_reserve(dev, "rx_ring", queue_idx, size, socket_id);
1380         if (rz == NULL) {
1381                 igb_rx_queue_release(rxq);
1382                 return (-ENOMEM);
1383         }
1384         rxq->rdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDT(rxq->reg_idx));
1385         rxq->rdh_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDH(rxq->reg_idx));
1386 #ifndef RTE_LIBRTE_XEN_DOM0
1387         rxq->rx_ring_phys_addr = (uint64_t) rz->phys_addr;
1388 #else
1389         rxq->rx_ring_phys_addr = rte_mem_phy2mch(rz->memseg_id, rz->phys_addr);
1390 #endif
1391         rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr;
1392
1393         /* Allocate software ring. */
1394         rxq->sw_ring = rte_zmalloc("rxq->sw_ring",
1395                                    sizeof(struct igb_rx_entry) * nb_desc,
1396                                    CACHE_LINE_SIZE);
1397         if (rxq->sw_ring == NULL) {
1398                 igb_rx_queue_release(rxq);
1399                 return (-ENOMEM);
1400         }
1401         PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64"\n",
1402                      rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr);
1403
1404         dev->data->rx_queues[queue_idx] = rxq;
1405         igb_reset_rx_queue(rxq);
1406
1407         return 0;
1408 }
1409
1410 uint32_t
1411 eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1412 {
1413 #define IGB_RXQ_SCAN_INTERVAL 4
1414         volatile union e1000_adv_rx_desc *rxdp;
1415         struct igb_rx_queue *rxq;
1416         uint32_t desc = 0;
1417
1418         if (rx_queue_id >= dev->data->nb_rx_queues) {
1419                 PMD_RX_LOG(ERR, "Invalid RX queue id=%d\n", rx_queue_id);
1420                 return 0;
1421         }
1422
1423         rxq = dev->data->rx_queues[rx_queue_id];
1424         rxdp = &(rxq->rx_ring[rxq->rx_tail]);
1425
1426         while ((desc < rxq->nb_rx_desc) &&
1427                 (rxdp->wb.upper.status_error & E1000_RXD_STAT_DD)) {
1428                 desc += IGB_RXQ_SCAN_INTERVAL;
1429                 rxdp += IGB_RXQ_SCAN_INTERVAL;
1430                 if (rxq->rx_tail + desc >= rxq->nb_rx_desc)
1431                         rxdp = &(rxq->rx_ring[rxq->rx_tail +
1432                                 desc - rxq->nb_rx_desc]);
1433         }
1434
1435         return 0;
1436 }
1437
1438 int
1439 eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)
1440 {
1441         volatile union e1000_adv_rx_desc *rxdp;
1442         struct igb_rx_queue *rxq = rx_queue;
1443         uint32_t desc;
1444
1445         if (unlikely(offset >= rxq->nb_rx_desc))
1446                 return 0;
1447         desc = rxq->rx_tail + offset;
1448         if (desc >= rxq->nb_rx_desc)
1449                 desc -= rxq->nb_rx_desc;
1450
1451         rxdp = &rxq->rx_ring[desc];
1452         return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD);
1453 }
1454
1455 void
1456 igb_dev_clear_queues(struct rte_eth_dev *dev)
1457 {
1458         uint16_t i;
1459         struct igb_tx_queue *txq;
1460         struct igb_rx_queue *rxq;
1461
1462         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1463                 txq = dev->data->tx_queues[i];
1464                 if (txq != NULL) {
1465                         igb_tx_queue_release_mbufs(txq);
1466                         igb_reset_tx_queue(txq, dev);
1467                 }
1468         }
1469
1470         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1471                 rxq = dev->data->rx_queues[i];
1472                 if (rxq != NULL) {
1473                         igb_rx_queue_release_mbufs(rxq);
1474                         igb_reset_rx_queue(rxq);
1475                 }
1476         }
1477 }
1478
1479 /**
1480  * Receive Side Scaling (RSS).
1481  * See section 7.1.1.7 in the following document:
1482  *     "Intel 82576 GbE Controller Datasheet" - Revision 2.45 October 2009
1483  *
1484  * Principles:
1485  * The source and destination IP addresses of the IP header and the source and
1486  * destination ports of TCP/UDP headers, if any, of received packets are hashed
1487  * against a configurable random key to compute a 32-bit RSS hash result.
1488  * The seven (7) LSBs of the 32-bit hash result are used as an index into a
1489  * 128-entry redirection table (RETA).  Each entry of the RETA provides a 3-bit
1490  * RSS output index which is used as the RX queue index where to store the
1491  * received packets.
1492  * The following output is supplied in the RX write-back descriptor:
1493  *     - 32-bit result of the Microsoft RSS hash function,
1494  *     - 4-bit RSS type field.
1495  */
1496
1497 /*
1498  * RSS random key supplied in section 7.1.1.7.3 of the Intel 82576 datasheet.
1499  * Used as the default key.
1500  */
1501 static uint8_t rss_intel_key[40] = {
1502         0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
1503         0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
1504         0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
1505         0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
1506         0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
1507 };
1508
1509 static void
1510 igb_rss_disable(struct rte_eth_dev *dev)
1511 {
1512         struct e1000_hw *hw;
1513         uint32_t mrqc;
1514
1515         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1516         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1517         mrqc &= ~E1000_MRQC_ENABLE_MASK;
1518         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1519 }
1520
1521 static void
1522 igb_rss_configure(struct rte_eth_dev *dev)
1523 {
1524         struct e1000_hw *hw;
1525         uint8_t *hash_key;
1526         uint32_t rss_key;
1527         uint32_t mrqc;
1528         uint32_t shift;
1529         uint16_t rss_hf;
1530         uint16_t i;
1531
1532         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1533
1534         rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
1535         if (rss_hf == 0) /* Disable RSS. */ {
1536                 igb_rss_disable(dev);
1537                 return;
1538         }
1539         hash_key = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_key;
1540         if (hash_key == NULL)
1541                 hash_key = rss_intel_key; /* Default hash key. */
1542
1543         /* Fill in RSS hash key. */
1544         for (i = 0; i < 10; i++) {
1545                 rss_key  = hash_key[(i * 4)];
1546                 rss_key |= hash_key[(i * 4) + 1] << 8;
1547                 rss_key |= hash_key[(i * 4) + 2] << 16;
1548                 rss_key |= hash_key[(i * 4) + 3] << 24;
1549                 E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
1550         }
1551
1552         /* Fill in redirection table. */
1553         shift = (hw->mac.type == e1000_82575) ? 6 : 0;
1554         for (i = 0; i < 128; i++) {
1555                 union e1000_reta {
1556                         uint32_t dword;
1557                         uint8_t  bytes[4];
1558                 } reta;
1559                 uint8_t q_idx;
1560
1561                 q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
1562                                    i % dev->data->nb_rx_queues : 0);
1563                 reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
1564                 if ((i & 3) == 3)
1565                         E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
1566         }
1567
1568         /* Set configured hashing functions in MRQC register. */
1569         mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */
1570         if (rss_hf & ETH_RSS_IPV4)
1571                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4;
1572         if (rss_hf & ETH_RSS_IPV4_TCP)
1573                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_TCP;
1574         if (rss_hf & ETH_RSS_IPV6)
1575                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6;
1576         if (rss_hf & ETH_RSS_IPV6_EX)
1577                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_EX;
1578         if (rss_hf & ETH_RSS_IPV6_TCP)
1579                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP;
1580         if (rss_hf & ETH_RSS_IPV6_TCP_EX)
1581                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
1582         if (rss_hf & ETH_RSS_IPV4_UDP)
1583                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP;
1584         if (rss_hf & ETH_RSS_IPV6_UDP)
1585                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP;
1586         if (rss_hf & ETH_RSS_IPV6_UDP_EX)
1587                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP_EX;
1588         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1589 }
1590
1591 /*
1592  * Check if the mac type support VMDq or not.
1593  * Return 1 if it supports, otherwise, return 0.
1594  */
1595 static int
1596 igb_is_vmdq_supported(const struct rte_eth_dev *dev)
1597 {
1598         const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1599
1600         switch (hw->mac.type) {
1601         case e1000_82576:
1602         case e1000_82580:
1603         case e1000_i350:
1604                 return 1;
1605         case e1000_82540:
1606         case e1000_82541:
1607         case e1000_82542:
1608         case e1000_82543:
1609         case e1000_82544:
1610         case e1000_82545:
1611         case e1000_82546:
1612         case e1000_82547:
1613         case e1000_82571:
1614         case e1000_82572:
1615         case e1000_82573:
1616         case e1000_82574:
1617         case e1000_82583:
1618         case e1000_i210:
1619         case e1000_i211:
1620         default:
1621                 PMD_INIT_LOG(ERR, "Cannot support VMDq feature\n");
1622                 return 0;
1623         }
1624 }
1625
1626 static int
1627 igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
1628 {
1629         struct rte_eth_vmdq_rx_conf *cfg;
1630         struct e1000_hw *hw;
1631         uint32_t mrqc, vt_ctl, vmolr, rctl;
1632         int i;
1633
1634         PMD_INIT_LOG(DEBUG, ">>");
1635         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1636         cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf;
1637
1638         /* Check if mac type can support VMDq, return value of 0 means NOT support */
1639         if (igb_is_vmdq_supported(dev) == 0)
1640                 return -1;
1641
1642         igb_rss_disable(dev);
1643
1644         /* RCTL: eanble VLAN filter */
1645         rctl = E1000_READ_REG(hw, E1000_RCTL);
1646         rctl |= E1000_RCTL_VFE;
1647         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
1648
1649         /* MRQC: enable vmdq */
1650         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1651         mrqc |= E1000_MRQC_ENABLE_VMDQ;
1652         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1653
1654         /* VTCTL:  pool selection according to VLAN tag */
1655         vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
1656         if (cfg->enable_default_pool)
1657                 vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT);
1658         vt_ctl |= E1000_VT_CTL_IGNORE_MAC;
1659         E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
1660
1661         /*
1662          * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1
1663          * Both 82576 and 82580 support it
1664          */
1665         if (hw->mac.type != e1000_i350) {
1666                 for (i = 0; i < E1000_VMOLR_SIZE; i++) {
1667                         vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
1668                         vmolr |= E1000_VMOLR_STRVLAN;
1669                         E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
1670                 }
1671         }
1672
1673         /* VFTA - enable all vlan filters */
1674         for (i = 0; i < IGB_VFTA_SIZE; i++)
1675                 E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX);
1676
1677         /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */
1678         if (hw->mac.type != e1000_82580)
1679                 E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK);
1680
1681         /*
1682          * RAH/RAL - allow pools to read specific mac addresses
1683          * In this case, all pools should be able to read from mac addr 0
1684          */
1685         E1000_WRITE_REG(hw, E1000_RAH(0), (E1000_RAH_AV | UINT16_MAX));
1686         E1000_WRITE_REG(hw, E1000_RAL(0), UINT32_MAX);
1687
1688         /* VLVF: set up filters for vlan tags as configured */
1689         for (i = 0; i < cfg->nb_pool_maps; i++) {
1690                 /* set vlan id in VF register and set the valid bit */
1691                 E1000_WRITE_REG(hw, E1000_VLVF(i), (E1000_VLVF_VLANID_ENABLE | \
1692                         (cfg->pool_map[i].vlan_id & ETH_VLAN_ID_MAX) | \
1693                         ((cfg->pool_map[i].pools << E1000_VLVF_POOLSEL_SHIFT ) & \
1694                         E1000_VLVF_POOLSEL_MASK)));
1695         }
1696
1697         E1000_WRITE_FLUSH(hw);
1698
1699         return 0;
1700 }
1701
1702
1703 /*********************************************************************
1704  *
1705  *  Enable receive unit.
1706  *
1707  **********************************************************************/
1708
1709 static int
1710 igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq)
1711 {
1712         struct igb_rx_entry *rxe = rxq->sw_ring;
1713         uint64_t dma_addr;
1714         unsigned i;
1715
1716         /* Initialize software ring entries. */
1717         for (i = 0; i < rxq->nb_rx_desc; i++) {
1718                 volatile union e1000_adv_rx_desc *rxd;
1719                 struct rte_mbuf *mbuf = rte_rxmbuf_alloc(rxq->mb_pool);
1720
1721                 if (mbuf == NULL) {
1722                         PMD_INIT_LOG(ERR, "RX mbuf alloc failed "
1723                                 "queue_id=%hu\n", rxq->queue_id);
1724                         igb_rx_queue_release(rxq);
1725                         return (-ENOMEM);
1726                 }
1727                 dma_addr =
1728                         rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mbuf));
1729                 rxd = &rxq->rx_ring[i];
1730                 rxd->read.hdr_addr = dma_addr;
1731                 rxd->read.pkt_addr = dma_addr;
1732                 rxe[i].mbuf = mbuf;
1733         }
1734
1735         return 0;
1736 }
1737
1738 #define E1000_MRQC_DEF_Q_SHIFT               (3)
1739 static int
1740 igb_dev_mq_rx_configure(struct rte_eth_dev *dev)
1741 {
1742         struct e1000_hw *hw =
1743                 E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1744         uint32_t mrqc;
1745
1746         if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) {
1747                 /*
1748                 * SRIOV active scheme
1749                 * FIXME if support RSS together with VMDq & SRIOV
1750                 */
1751                 mrqc = E1000_MRQC_ENABLE_VMDQ;
1752                 /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */
1753                 mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT;
1754                 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1755         } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) {
1756                 /*
1757                 * SRIOV inactive scheme
1758                 */
1759                 switch (dev->data->dev_conf.rxmode.mq_mode) {
1760                         case ETH_MQ_RX_RSS:
1761                                 igb_rss_configure(dev);
1762                                 break;
1763                         case ETH_MQ_RX_VMDQ_ONLY:
1764                                 /*Configure general VMDQ only RX parameters*/
1765                                 igb_vmdq_rx_hw_configure(dev);
1766                                 break;
1767                         case ETH_MQ_RX_NONE:
1768                                 /* if mq_mode is none, disable rss mode.*/
1769                         default:
1770                                 igb_rss_disable(dev);
1771                                 break;
1772                 }
1773         }
1774
1775         return 0;
1776 }
1777
1778 int
1779 eth_igb_rx_init(struct rte_eth_dev *dev)
1780 {
1781         struct e1000_hw     *hw;
1782         struct igb_rx_queue *rxq;
1783         struct rte_pktmbuf_pool_private *mbp_priv;
1784         uint32_t rctl;
1785         uint32_t rxcsum;
1786         uint32_t srrctl;
1787         uint16_t buf_size;
1788         uint16_t rctl_bsize;
1789         uint16_t i;
1790         int ret;
1791
1792         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1793         srrctl = 0;
1794
1795         /*
1796          * Make sure receives are disabled while setting
1797          * up the descriptor ring.
1798          */
1799         rctl = E1000_READ_REG(hw, E1000_RCTL);
1800         E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
1801
1802         /*
1803          * Configure support of jumbo frames, if any.
1804          */
1805         if (dev->data->dev_conf.rxmode.jumbo_frame == 1) {
1806                 rctl |= E1000_RCTL_LPE;
1807
1808                 /*
1809                  * Set maximum packet length by default, and might be updated
1810                  * together with enabling/disabling dual VLAN.
1811                  */
1812                 E1000_WRITE_REG(hw, E1000_RLPML,
1813                         dev->data->dev_conf.rxmode.max_rx_pkt_len +
1814                                                 VLAN_TAG_SIZE);
1815         } else
1816                 rctl &= ~E1000_RCTL_LPE;
1817
1818         /* Configure and enable each RX queue. */
1819         rctl_bsize = 0;
1820         dev->rx_pkt_burst = eth_igb_recv_pkts;
1821         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1822                 uint64_t bus_addr;
1823                 uint32_t rxdctl;
1824
1825                 rxq = dev->data->rx_queues[i];
1826
1827                 /* Allocate buffers for descriptor rings and set up queue */
1828                 ret = igb_alloc_rx_queue_mbufs(rxq);
1829                 if (ret)
1830                         return ret;
1831
1832                 /*
1833                  * Reset crc_len in case it was changed after queue setup by a
1834                  *  call to configure
1835                  */
1836                 rxq->crc_len =
1837                         (uint8_t)(dev->data->dev_conf.rxmode.hw_strip_crc ?
1838                                                         0 : ETHER_CRC_LEN);
1839
1840                 bus_addr = rxq->rx_ring_phys_addr;
1841                 E1000_WRITE_REG(hw, E1000_RDLEN(rxq->reg_idx),
1842                                 rxq->nb_rx_desc *
1843                                 sizeof(union e1000_adv_rx_desc));
1844                 E1000_WRITE_REG(hw, E1000_RDBAH(rxq->reg_idx),
1845                                 (uint32_t)(bus_addr >> 32));
1846                 E1000_WRITE_REG(hw, E1000_RDBAL(rxq->reg_idx), (uint32_t)bus_addr);
1847
1848                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1849
1850                 /*
1851                  * Configure RX buffer size.
1852                  */
1853                 mbp_priv = rte_mempool_get_priv(rxq->mb_pool);
1854                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
1855                                        RTE_PKTMBUF_HEADROOM);
1856                 if (buf_size >= 1024) {
1857                         /*
1858                          * Configure the BSIZEPACKET field of the SRRCTL
1859                          * register of the queue.
1860                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
1861                          * If this field is equal to 0b, then RCTL.BSIZE
1862                          * determines the RX packet buffer size.
1863                          */
1864                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
1865                                    E1000_SRRCTL_BSIZEPKT_MASK);
1866                         buf_size = (uint16_t) ((srrctl &
1867                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
1868                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
1869
1870                         /* It adds dual VLAN length for supporting dual VLAN */
1871                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
1872                                                 2 * VLAN_TAG_SIZE) > buf_size){
1873                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
1874                                 dev->data->scattered_rx = 1;
1875                         }
1876                 } else {
1877                         /*
1878                          * Use BSIZE field of the device RCTL register.
1879                          */
1880                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
1881                                 rctl_bsize = buf_size;
1882                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
1883                         dev->data->scattered_rx = 1;
1884                 }
1885
1886                 /* Set if packets are dropped when no descriptors available */
1887                 if (rxq->drop_en)
1888                         srrctl |= E1000_SRRCTL_DROP_EN;
1889
1890                 E1000_WRITE_REG(hw, E1000_SRRCTL(rxq->reg_idx), srrctl);
1891
1892                 /* Enable this RX queue. */
1893                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(rxq->reg_idx));
1894                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1895                 rxdctl &= 0xFFF00000;
1896                 rxdctl |= (rxq->pthresh & 0x1F);
1897                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
1898                 rxdctl |= ((rxq->wthresh & 0x1F) << 16);
1899                 E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl);
1900         }
1901
1902         /*
1903          * Setup BSIZE field of RCTL register, if needed.
1904          * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL
1905          * register, since the code above configures the SRRCTL register of
1906          * the RX queue in such a case.
1907          * All configurable sizes are:
1908          * 16384: rctl |= (E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX);
1909          *  8192: rctl |= (E1000_RCTL_SZ_8192  | E1000_RCTL_BSEX);
1910          *  4096: rctl |= (E1000_RCTL_SZ_4096  | E1000_RCTL_BSEX);
1911          *  2048: rctl |= E1000_RCTL_SZ_2048;
1912          *  1024: rctl |= E1000_RCTL_SZ_1024;
1913          *   512: rctl |= E1000_RCTL_SZ_512;
1914          *   256: rctl |= E1000_RCTL_SZ_256;
1915          */
1916         if (rctl_bsize > 0) {
1917                 if (rctl_bsize >= 512) /* 512 <= buf_size < 1024 - use 512 */
1918                         rctl |= E1000_RCTL_SZ_512;
1919                 else /* 256 <= buf_size < 512 - use 256 */
1920                         rctl |= E1000_RCTL_SZ_256;
1921         }
1922
1923         /*
1924          * Configure RSS if device configured with multiple RX queues.
1925          */
1926         igb_dev_mq_rx_configure(dev);
1927
1928         /* Update the rctl since igb_dev_mq_rx_configure may change its value */
1929         rctl |= E1000_READ_REG(hw, E1000_RCTL);
1930
1931         /*
1932          * Setup the Checksum Register.
1933          * Receive Full-Packet Checksum Offload is mutually exclusive with RSS.
1934          */
1935         rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
1936         rxcsum |= E1000_RXCSUM_PCSD;
1937
1938         /* Enable both L3/L4 rx checksum offload */
1939         if (dev->data->dev_conf.rxmode.hw_ip_checksum)
1940                 rxcsum |= (E1000_RXCSUM_IPOFL  | E1000_RXCSUM_TUOFL);
1941         else
1942                 rxcsum &= ~(E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL);
1943         E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
1944
1945         /* Setup the Receive Control Register. */
1946         if (dev->data->dev_conf.rxmode.hw_strip_crc) {
1947                 rctl |= E1000_RCTL_SECRC; /* Strip Ethernet CRC. */
1948
1949                 /* set STRCRC bit in all queues */
1950                 if (hw->mac.type == e1000_i350 ||
1951                     hw->mac.type == e1000_i210 ||
1952                     hw->mac.type == e1000_i211 ||
1953                     hw->mac.type == e1000_i354) {
1954                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1955                                 rxq = dev->data->rx_queues[i];
1956                                 uint32_t dvmolr = E1000_READ_REG(hw,
1957                                         E1000_DVMOLR(rxq->reg_idx));
1958                                 dvmolr |= E1000_DVMOLR_STRCRC;
1959                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
1960                         }
1961                 }
1962         } else {
1963                 rctl &= ~E1000_RCTL_SECRC; /* Do not Strip Ethernet CRC. */
1964
1965                 /* clear STRCRC bit in all queues */
1966                 if (hw->mac.type == e1000_i350 ||
1967                     hw->mac.type == e1000_i210 ||
1968                     hw->mac.type == e1000_i211 ||
1969                     hw->mac.type == e1000_i354) {
1970                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1971                                 rxq = dev->data->rx_queues[i];
1972                                 uint32_t dvmolr = E1000_READ_REG(hw,
1973                                         E1000_DVMOLR(rxq->reg_idx));
1974                                 dvmolr &= ~E1000_DVMOLR_STRCRC;
1975                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
1976                         }
1977                 }
1978         }
1979
1980         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1981         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1982                 E1000_RCTL_RDMTS_HALF |
1983                 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1984
1985         /* Make sure VLAN Filters are off. */
1986         if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_VMDQ_ONLY)
1987                 rctl &= ~E1000_RCTL_VFE;
1988         /* Don't store bad packets. */
1989         rctl &= ~E1000_RCTL_SBP;
1990
1991         /* Enable Receives. */
1992         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
1993
1994         /*
1995          * Setup the HW Rx Head and Tail Descriptor Pointers.
1996          * This needs to be done after enable.
1997          */
1998         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1999                 rxq = dev->data->rx_queues[i];
2000                 E1000_WRITE_REG(hw, E1000_RDH(rxq->reg_idx), 0);
2001                 E1000_WRITE_REG(hw, E1000_RDT(rxq->reg_idx), rxq->nb_rx_desc - 1);
2002         }
2003
2004         return 0;
2005 }
2006
2007 /*********************************************************************
2008  *
2009  *  Enable transmit unit.
2010  *
2011  **********************************************************************/
2012 void
2013 eth_igb_tx_init(struct rte_eth_dev *dev)
2014 {
2015         struct e1000_hw     *hw;
2016         struct igb_tx_queue *txq;
2017         uint32_t tctl;
2018         uint32_t txdctl;
2019         uint16_t i;
2020
2021         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2022
2023         /* Setup the Base and Length of the Tx Descriptor Rings. */
2024         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2025                 uint64_t bus_addr;
2026                 txq = dev->data->tx_queues[i];
2027                 bus_addr = txq->tx_ring_phys_addr;
2028
2029                 E1000_WRITE_REG(hw, E1000_TDLEN(txq->reg_idx),
2030                                 txq->nb_tx_desc *
2031                                 sizeof(union e1000_adv_tx_desc));
2032                 E1000_WRITE_REG(hw, E1000_TDBAH(txq->reg_idx),
2033                                 (uint32_t)(bus_addr >> 32));
2034                 E1000_WRITE_REG(hw, E1000_TDBAL(txq->reg_idx), (uint32_t)bus_addr);
2035
2036                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2037                 E1000_WRITE_REG(hw, E1000_TDT(txq->reg_idx), 0);
2038                 E1000_WRITE_REG(hw, E1000_TDH(txq->reg_idx), 0);
2039
2040                 /* Setup Transmit threshold registers. */
2041                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(txq->reg_idx));
2042                 txdctl |= txq->pthresh & 0x1F;
2043                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2044                 txdctl |= ((txq->wthresh & 0x1F) << 16);
2045                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2046                 E1000_WRITE_REG(hw, E1000_TXDCTL(txq->reg_idx), txdctl);
2047         }
2048
2049         /* Program the Transmit Control Register. */
2050         tctl = E1000_READ_REG(hw, E1000_TCTL);
2051         tctl &= ~E1000_TCTL_CT;
2052         tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN |
2053                  (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT));
2054
2055         e1000_config_collision_dist(hw);
2056
2057         /* This write will effectively turn on the transmit unit. */
2058         E1000_WRITE_REG(hw, E1000_TCTL, tctl);
2059 }
2060
2061 /*********************************************************************
2062  *
2063  *  Enable VF receive unit.
2064  *
2065  **********************************************************************/
2066 int
2067 eth_igbvf_rx_init(struct rte_eth_dev *dev)
2068 {
2069         struct e1000_hw     *hw;
2070         struct igb_rx_queue *rxq;
2071         struct rte_pktmbuf_pool_private *mbp_priv;
2072         uint32_t srrctl;
2073         uint16_t buf_size;
2074         uint16_t rctl_bsize;
2075         uint16_t i;
2076         int ret;
2077
2078         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2079
2080         /* setup MTU */
2081         e1000_rlpml_set_vf(hw,
2082                 (uint16_t)(dev->data->dev_conf.rxmode.max_rx_pkt_len +
2083                 VLAN_TAG_SIZE));
2084
2085         /* Configure and enable each RX queue. */
2086         rctl_bsize = 0;
2087         dev->rx_pkt_burst = eth_igb_recv_pkts;
2088         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2089                 uint64_t bus_addr;
2090                 uint32_t rxdctl;
2091
2092                 rxq = dev->data->rx_queues[i];
2093
2094                 /* Allocate buffers for descriptor rings and set up queue */
2095                 ret = igb_alloc_rx_queue_mbufs(rxq);
2096                 if (ret)
2097                         return ret;
2098
2099                 bus_addr = rxq->rx_ring_phys_addr;
2100                 E1000_WRITE_REG(hw, E1000_RDLEN(i),
2101                                 rxq->nb_rx_desc *
2102                                 sizeof(union e1000_adv_rx_desc));
2103                 E1000_WRITE_REG(hw, E1000_RDBAH(i),
2104                                 (uint32_t)(bus_addr >> 32));
2105                 E1000_WRITE_REG(hw, E1000_RDBAL(i), (uint32_t)bus_addr);
2106
2107                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2108
2109                 /*
2110                  * Configure RX buffer size.
2111                  */
2112                 mbp_priv = rte_mempool_get_priv(rxq->mb_pool);
2113                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
2114                                        RTE_PKTMBUF_HEADROOM);
2115                 if (buf_size >= 1024) {
2116                         /*
2117                          * Configure the BSIZEPACKET field of the SRRCTL
2118                          * register of the queue.
2119                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
2120                          * If this field is equal to 0b, then RCTL.BSIZE
2121                          * determines the RX packet buffer size.
2122                          */
2123                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2124                                    E1000_SRRCTL_BSIZEPKT_MASK);
2125                         buf_size = (uint16_t) ((srrctl &
2126                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
2127                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
2128
2129                         /* It adds dual VLAN length for supporting dual VLAN */
2130                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2131                                                 2 * VLAN_TAG_SIZE) > buf_size){
2132                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2133                                 dev->data->scattered_rx = 1;
2134                         }
2135                 } else {
2136                         /*
2137                          * Use BSIZE field of the device RCTL register.
2138                          */
2139                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2140                                 rctl_bsize = buf_size;
2141                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2142                         dev->data->scattered_rx = 1;
2143                 }
2144
2145                 /* Set if packets are dropped when no descriptors available */
2146                 if (rxq->drop_en)
2147                         srrctl |= E1000_SRRCTL_DROP_EN;
2148
2149                 E1000_WRITE_REG(hw, E1000_SRRCTL(i), srrctl);
2150
2151                 /* Enable this RX queue. */
2152                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i));
2153                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2154                 rxdctl &= 0xFFF00000;
2155                 rxdctl |= (rxq->pthresh & 0x1F);
2156                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2157                 if (hw->mac.type == e1000_82576) {
2158                         /*
2159                          * Workaround of 82576 VF Erratum
2160                          * force set WTHRESH to 1
2161                          * to avoid Write-Back not triggered sometimes
2162                          */
2163                         rxdctl |= 0x10000;
2164                         PMD_INIT_LOG(DEBUG, "Force set RX WTHRESH to 1 !\n");
2165                 }
2166                 else
2167                         rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2168                 E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
2169         }
2170
2171         /*
2172          * Setup the HW Rx Head and Tail Descriptor Pointers.
2173          * This needs to be done after enable.
2174          */
2175         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2176                 rxq = dev->data->rx_queues[i];
2177                 E1000_WRITE_REG(hw, E1000_RDH(i), 0);
2178                 E1000_WRITE_REG(hw, E1000_RDT(i), rxq->nb_rx_desc - 1);
2179         }
2180
2181         return 0;
2182 }
2183
2184 /*********************************************************************
2185  *
2186  *  Enable VF transmit unit.
2187  *
2188  **********************************************************************/
2189 void
2190 eth_igbvf_tx_init(struct rte_eth_dev *dev)
2191 {
2192         struct e1000_hw     *hw;
2193         struct igb_tx_queue *txq;
2194         uint32_t txdctl;
2195         uint16_t i;
2196
2197         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2198
2199         /* Setup the Base and Length of the Tx Descriptor Rings. */
2200         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2201                 uint64_t bus_addr;
2202
2203                 txq = dev->data->tx_queues[i];
2204                 bus_addr = txq->tx_ring_phys_addr;
2205                 E1000_WRITE_REG(hw, E1000_TDLEN(i),
2206                                 txq->nb_tx_desc *
2207                                 sizeof(union e1000_adv_tx_desc));
2208                 E1000_WRITE_REG(hw, E1000_TDBAH(i),
2209                                 (uint32_t)(bus_addr >> 32));
2210                 E1000_WRITE_REG(hw, E1000_TDBAL(i), (uint32_t)bus_addr);
2211
2212                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2213                 E1000_WRITE_REG(hw, E1000_TDT(i), 0);
2214                 E1000_WRITE_REG(hw, E1000_TDH(i), 0);
2215
2216                 /* Setup Transmit threshold registers. */
2217                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(i));
2218                 txdctl |= txq->pthresh & 0x1F;
2219                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2220                 if (hw->mac.type == e1000_82576) {
2221                         /*
2222                          * Workaround of 82576 VF Erratum
2223                          * force set WTHRESH to 1
2224                          * to avoid Write-Back not triggered sometimes
2225                          */
2226                         txdctl |= 0x10000;
2227                         PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !\n");
2228                 }
2229                 else
2230                         txdctl |= ((txq->wthresh & 0x1F) << 16);
2231                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2232                 E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl);
2233         }
2234
2235 }
2236