drivers/net/e1000/igb_rxtx.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <sys/queue.h>
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <stdint.h>
  12 #include <stdarg.h>
  13 #include <inttypes.h>
  14
  15 #include <rte_interrupts.h>
  16 #include <rte_byteorder.h>
  17 #include <rte_common.h>
  18 #include <rte_log.h>
  19 #include <rte_debug.h>
  20 #include <rte_pci.h>
  21 #include <rte_memory.h>
  22 #include <rte_memcpy.h>
  23 #include <rte_memzone.h>
  24 #include <rte_launch.h>
  25 #include <rte_eal.h>
  26 #include <rte_per_lcore.h>
  27 #include <rte_lcore.h>
  28 #include <rte_atomic.h>
  29 #include <rte_branch_prediction.h>
  30 #include <rte_mempool.h>
  31 #include <rte_malloc.h>
  32 #include <rte_mbuf.h>
  33 #include <rte_ether.h>
  34 #include <rte_ethdev_driver.h>
  35 #include <rte_prefetch.h>
  36 #include <rte_udp.h>
  37 #include <rte_tcp.h>
  38 #include <rte_sctp.h>
  39 #include <rte_net.h>
  40 #include <rte_string_fns.h>
  41
  42 #include "e1000_logs.h"
  43 #include "base/e1000_api.h"
  44 #include "e1000_ethdev.h"
  45
  46 #ifdef RTE_LIBRTE_IEEE1588
  47 #define IGB_TX_IEEE1588_TMST PKT_TX_IEEE1588_TMST
  48 #else
  49 #define IGB_TX_IEEE1588_TMST 0
  50 #endif
  51 /* Bit Mask to indicate what bits required for building TX context */
  52 #define IGB_TX_OFFLOAD_MASK (                    \
  53                 PKT_TX_VLAN_PKT |                \
  54                 PKT_TX_IP_CKSUM |                \
  55                 PKT_TX_L4_MASK |                 \
  56                 PKT_TX_TCP_SEG |                 \
  57                 IGB_TX_IEEE1588_TMST)
  58
  59 #define IGB_TX_OFFLOAD_NOTSUP_MASK \
  60                 (PKT_TX_OFFLOAD_MASK ^ IGB_TX_OFFLOAD_MASK)
  61
  62 /**
  63  * Structure associated with each descriptor of the RX ring of a RX queue.
  64  */
  65 struct igb_rx_entry {
  66         struct rte_mbuf *mbuf; /**< mbuf associated with RX descriptor. */
  67 };
  68
  69 /**
  70  * Structure associated with each descriptor of the TX ring of a TX queue.
  71  */
  72 struct igb_tx_entry {
  73         struct rte_mbuf *mbuf; /**< mbuf associated with TX desc, if any. */
  74         uint16_t next_id; /**< Index of next descriptor in ring. */
  75         uint16_t last_id; /**< Index of last scattered descriptor. */
  76 };
  77
  78 /**
  79  * rx queue flags
  80  */
  81 enum igb_rxq_flags {
  82         IGB_RXQ_FLAG_LB_BSWAP_VLAN = 0x01,
  83 };
  84
  85 /**
  86  * Structure associated with each RX queue.
  87  */
  88 struct igb_rx_queue {
  89         struct rte_mempool  *mb_pool;   /**< mbuf pool to populate RX ring. */
  90         volatile union e1000_adv_rx_desc *rx_ring; /**< RX ring virtual address. */
  91         uint64_t            rx_ring_phys_addr; /**< RX ring DMA address. */
  92         volatile uint32_t   *rdt_reg_addr; /**< RDT register address. */
  93         volatile uint32_t   *rdh_reg_addr; /**< RDH register address. */
  94         struct igb_rx_entry *sw_ring;   /**< address of RX software ring. */
  95         struct rte_mbuf *pkt_first_seg; /**< First segment of current packet. */
  96         struct rte_mbuf *pkt_last_seg;  /**< Last segment of current packet. */
  97         uint16_t            nb_rx_desc; /**< number of RX descriptors. */
  98         uint16_t            rx_tail;    /**< current value of RDT register. */
  99         uint16_t            nb_rx_hold; /**< number of held free RX desc. */
 100         uint16_t            rx_free_thresh; /**< max free RX desc to hold. */
 101         uint16_t            queue_id;   /**< RX queue index. */
 102         uint16_t            reg_idx;    /**< RX queue register index. */
 103         uint16_t            port_id;    /**< Device port identifier. */
 104         uint8_t             pthresh;    /**< Prefetch threshold register. */
 105         uint8_t             hthresh;    /**< Host threshold register. */
 106         uint8_t             wthresh;    /**< Write-back threshold register. */
 107         uint8_t             crc_len;    /**< 0 if CRC stripped, 4 otherwise. */
 108         uint8_t             drop_en;  /**< If not 0, set SRRCTL.Drop_En. */
 109         uint32_t            flags;      /**< RX flags. */
 110         uint64_t            offloads;   /**< offloads of DEV_RX_OFFLOAD_* */
 111 };
 112
 113 /**
 114  * Hardware context number
 115  */
 116 enum igb_advctx_num {
 117         IGB_CTX_0    = 0, /**< CTX0    */
 118         IGB_CTX_1    = 1, /**< CTX1    */
 119         IGB_CTX_NUM  = 2, /**< CTX_NUM */
 120 };
 121
 122 /** Offload features */
 123 union igb_tx_offload {
 124         uint64_t data;
 125         struct {
 126                 uint64_t l3_len:9; /**< L3 (IP) Header Length. */
 127                 uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
 128                 uint64_t vlan_tci:16;  /**< VLAN Tag Control Identifier(CPU order). */
 129                 uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
 130                 uint64_t tso_segsz:16; /**< TCP TSO segment size. */
 131
 132                 /* uint64_t unused:8; */
 133         };
 134 };
 135
 136 /*
 137  * Compare mask for igb_tx_offload.data,
 138  * should be in sync with igb_tx_offload layout.
 139  * */
 140 #define TX_MACIP_LEN_CMP_MASK   0x000000000000FFFFULL /**< L2L3 header mask. */
 141 #define TX_VLAN_CMP_MASK                0x00000000FFFF0000ULL /**< Vlan mask. */
 142 #define TX_TCP_LEN_CMP_MASK             0x000000FF00000000ULL /**< TCP header mask. */
 143 #define TX_TSO_MSS_CMP_MASK             0x00FFFF0000000000ULL /**< TSO segsz mask. */
 144 /** Mac + IP + TCP + Mss mask. */
 145 #define TX_TSO_CMP_MASK \
 146         (TX_MACIP_LEN_CMP_MASK | TX_TCP_LEN_CMP_MASK | TX_TSO_MSS_CMP_MASK)
 147
 148 /**
 149  * Strucutre to check if new context need be built
 150  */
 151 struct igb_advctx_info {
 152         uint64_t flags;           /**< ol_flags related to context build. */
 153         /** tx offload: vlan, tso, l2-l3-l4 lengths. */
 154         union igb_tx_offload tx_offload;
 155         /** compare mask for tx offload. */
 156         union igb_tx_offload tx_offload_mask;
 157 };
 158
 159 /**
 160  * Structure associated with each TX queue.
 161  */
 162 struct igb_tx_queue {
 163         volatile union e1000_adv_tx_desc *tx_ring; /**< TX ring address */
 164         uint64_t               tx_ring_phys_addr; /**< TX ring DMA address. */
 165         struct igb_tx_entry    *sw_ring; /**< virtual address of SW ring. */
 166         volatile uint32_t      *tdt_reg_addr; /**< Address of TDT register. */
 167         uint32_t               txd_type;      /**< Device-specific TXD type */
 168         uint16_t               nb_tx_desc;    /**< number of TX descriptors. */
 169         uint16_t               tx_tail; /**< Current value of TDT register. */
 170         uint16_t               tx_head;
 171         /**< Index of first used TX descriptor. */
 172         uint16_t               queue_id; /**< TX queue index. */
 173         uint16_t               reg_idx;  /**< TX queue register index. */
 174         uint16_t               port_id;  /**< Device port identifier. */
 175         uint8_t                pthresh;  /**< Prefetch threshold register. */
 176         uint8_t                hthresh;  /**< Host threshold register. */
 177         uint8_t                wthresh;  /**< Write-back threshold register. */
 178         uint32_t               ctx_curr;
 179         /**< Current used hardware descriptor. */
 180         uint32_t               ctx_start;
 181         /**< Start context position for transmit queue. */
 182         struct igb_advctx_info ctx_cache[IGB_CTX_NUM];
 183         /**< Hardware context history.*/
 184         uint64_t               offloads; /**< offloads of DEV_TX_OFFLOAD_* */
 185 };
 186
 187 #if 1
 188 #define RTE_PMD_USE_PREFETCH
 189 #endif
 190
 191 #ifdef RTE_PMD_USE_PREFETCH
 192 #define rte_igb_prefetch(p)     rte_prefetch0(p)
 193 #else
 194 #define rte_igb_prefetch(p)     do {} while(0)
 195 #endif
 196
 197 #ifdef RTE_PMD_PACKET_PREFETCH
 198 #define rte_packet_prefetch(p) rte_prefetch1(p)
 199 #else
 200 #define rte_packet_prefetch(p)  do {} while(0)
 201 #endif
 202
 203 /*
 204  * Macro for VMDq feature for 1 GbE NIC.
 205  */
 206 #define E1000_VMOLR_SIZE                        (8)
 207 #define IGB_TSO_MAX_HDRLEN                      (512)
 208 #define IGB_TSO_MAX_MSS                         (9216)
 209
 210 /*********************************************************************
 211  *
 212  *  TX function
 213  *
 214  **********************************************************************/
 215
 216 /*
 217  *There're some limitations in hardware for TCP segmentation offload. We
 218  *should check whether the parameters are valid.
 219  */
 220 static inline uint64_t
 221 check_tso_para(uint64_t ol_req, union igb_tx_offload ol_para)
 222 {
 223         if (!(ol_req & PKT_TX_TCP_SEG))
 224                 return ol_req;
 225         if ((ol_para.tso_segsz > IGB_TSO_MAX_MSS) || (ol_para.l2_len +
 226                         ol_para.l3_len + ol_para.l4_len > IGB_TSO_MAX_HDRLEN)) {
 227                 ol_req &= ~PKT_TX_TCP_SEG;
 228                 ol_req |= PKT_TX_TCP_CKSUM;
 229         }
 230         return ol_req;
 231 }
 232
 233 /*
 234  * Advanced context descriptor are almost same between igb/ixgbe
 235  * This is a separate function, looking for optimization opportunity here
 236  * Rework required to go with the pre-defined values.
 237  */
 238
 239 static inline void
 240 igbe_set_xmit_ctx(struct igb_tx_queue* txq,
 241                 volatile struct e1000_adv_tx_context_desc *ctx_txd,
 242                 uint64_t ol_flags, union igb_tx_offload tx_offload)
 243 {
 244         uint32_t type_tucmd_mlhl;
 245         uint32_t mss_l4len_idx;
 246         uint32_t ctx_idx, ctx_curr;
 247         uint32_t vlan_macip_lens;
 248         union igb_tx_offload tx_offload_mask;
 249
 250         ctx_curr = txq->ctx_curr;
 251         ctx_idx = ctx_curr + txq->ctx_start;
 252
 253         tx_offload_mask.data = 0;
 254         type_tucmd_mlhl = 0;
 255
 256         /* Specify which HW CTX to upload. */
 257         mss_l4len_idx = (ctx_idx << E1000_ADVTXD_IDX_SHIFT);
 258
 259         if (ol_flags & PKT_TX_VLAN_PKT)
 260                 tx_offload_mask.data |= TX_VLAN_CMP_MASK;
 261
 262         /* check if TCP segmentation required for this packet */
 263         if (ol_flags & PKT_TX_TCP_SEG) {
 264                 /* implies IP cksum in IPv4 */
 265                 if (ol_flags & PKT_TX_IP_CKSUM)
 266                         type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV4 |
 267                                 E1000_ADVTXD_TUCMD_L4T_TCP |
 268                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 269                 else
 270                         type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV6 |
 271                                 E1000_ADVTXD_TUCMD_L4T_TCP |
 272                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 273
 274                 tx_offload_mask.data |= TX_TSO_CMP_MASK;
 275                 mss_l4len_idx |= tx_offload.tso_segsz << E1000_ADVTXD_MSS_SHIFT;
 276                 mss_l4len_idx |= tx_offload.l4_len << E1000_ADVTXD_L4LEN_SHIFT;
 277         } else { /* no TSO, check if hardware checksum is needed */
 278                 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK))
 279                         tx_offload_mask.data |= TX_MACIP_LEN_CMP_MASK;
 280
 281                 if (ol_flags & PKT_TX_IP_CKSUM)
 282                         type_tucmd_mlhl = E1000_ADVTXD_TUCMD_IPV4;
 283
 284                 switch (ol_flags & PKT_TX_L4_MASK) {
 285                 case PKT_TX_UDP_CKSUM:
 286                         type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_UDP |
 287                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 288                         mss_l4len_idx |= sizeof(struct udp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 289                         break;
 290                 case PKT_TX_TCP_CKSUM:
 291                         type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_TCP |
 292                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 293                         mss_l4len_idx |= sizeof(struct tcp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 294                         break;
 295                 case PKT_TX_SCTP_CKSUM:
 296                         type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_SCTP |
 297                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 298                         mss_l4len_idx |= sizeof(struct sctp_hdr) << E1000_ADVTXD_L4LEN_SHIFT;
 299                         break;
 300                 default:
 301                         type_tucmd_mlhl |= E1000_ADVTXD_TUCMD_L4T_RSV |
 302                                 E1000_ADVTXD_DTYP_CTXT | E1000_ADVTXD_DCMD_DEXT;
 303                         break;
 304                 }
 305         }
 306
 307         txq->ctx_cache[ctx_curr].flags = ol_flags;
 308         txq->ctx_cache[ctx_curr].tx_offload.data =
 309                 tx_offload_mask.data & tx_offload.data;
 310         txq->ctx_cache[ctx_curr].tx_offload_mask = tx_offload_mask;
 311
 312         ctx_txd->type_tucmd_mlhl = rte_cpu_to_le_32(type_tucmd_mlhl);
 313         vlan_macip_lens = (uint32_t)tx_offload.data;
 314         ctx_txd->vlan_macip_lens = rte_cpu_to_le_32(vlan_macip_lens);
 315         ctx_txd->mss_l4len_idx = rte_cpu_to_le_32(mss_l4len_idx);
 316         ctx_txd->seqnum_seed = 0;
 317 }
 318
 319 /*
 320  * Check which hardware context can be used. Use the existing match
 321  * or create a new context descriptor.
 322  */
 323 static inline uint32_t
 324 what_advctx_update(struct igb_tx_queue *txq, uint64_t flags,
 325                 union igb_tx_offload tx_offload)
 326 {
 327         /* If match with the current context */
 328         if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
 329                 (txq->ctx_cache[txq->ctx_curr].tx_offload.data ==
 330                 (txq->ctx_cache[txq->ctx_curr].tx_offload_mask.data & tx_offload.data)))) {
 331                         return txq->ctx_curr;
 332         }
 333
 334         /* If match with the second context */
 335         txq->ctx_curr ^= 1;
 336         if (likely((txq->ctx_cache[txq->ctx_curr].flags == flags) &&
 337                 (txq->ctx_cache[txq->ctx_curr].tx_offload.data ==
 338                 (txq->ctx_cache[txq->ctx_curr].tx_offload_mask.data & tx_offload.data)))) {
 339                         return txq->ctx_curr;
 340         }
 341
 342         /* Mismatch, use the previous context */
 343         return IGB_CTX_NUM;
 344 }
 345
 346 static inline uint32_t
 347 tx_desc_cksum_flags_to_olinfo(uint64_t ol_flags)
 348 {
 349         static const uint32_t l4_olinfo[2] = {0, E1000_ADVTXD_POPTS_TXSM};
 350         static const uint32_t l3_olinfo[2] = {0, E1000_ADVTXD_POPTS_IXSM};
 351         uint32_t tmp;
 352
 353         tmp  = l4_olinfo[(ol_flags & PKT_TX_L4_MASK)  != PKT_TX_L4_NO_CKSUM];
 354         tmp |= l3_olinfo[(ol_flags & PKT_TX_IP_CKSUM) != 0];
 355         tmp |= l4_olinfo[(ol_flags & PKT_TX_TCP_SEG) != 0];
 356         return tmp;
 357 }
 358
 359 static inline uint32_t
 360 tx_desc_vlan_flags_to_cmdtype(uint64_t ol_flags)
 361 {
 362         uint32_t cmdtype;
 363         static uint32_t vlan_cmd[2] = {0, E1000_ADVTXD_DCMD_VLE};
 364         static uint32_t tso_cmd[2] = {0, E1000_ADVTXD_DCMD_TSE};
 365         cmdtype = vlan_cmd[(ol_flags & PKT_TX_VLAN_PKT) != 0];
 366         cmdtype |= tso_cmd[(ol_flags & PKT_TX_TCP_SEG) != 0];
 367         return cmdtype;
 368 }
 369
 370 uint16_t
 371 eth_igb_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 372                uint16_t nb_pkts)
 373 {
 374         struct igb_tx_queue *txq;
 375         struct igb_tx_entry *sw_ring;
 376         struct igb_tx_entry *txe, *txn;
 377         volatile union e1000_adv_tx_desc *txr;
 378         volatile union e1000_adv_tx_desc *txd;
 379         struct rte_mbuf     *tx_pkt;
 380         struct rte_mbuf     *m_seg;
 381         uint64_t buf_dma_addr;
 382         uint32_t olinfo_status;
 383         uint32_t cmd_type_len;
 384         uint32_t pkt_len;
 385         uint16_t slen;
 386         uint64_t ol_flags;
 387         uint16_t tx_end;
 388         uint16_t tx_id;
 389         uint16_t tx_last;
 390         uint16_t nb_tx;
 391         uint64_t tx_ol_req;
 392         uint32_t new_ctx = 0;
 393         uint32_t ctx = 0;
 394         union igb_tx_offload tx_offload = {0};
 395
 396         txq = tx_queue;
 397         sw_ring = txq->sw_ring;
 398         txr     = txq->tx_ring;
 399         tx_id   = txq->tx_tail;
 400         txe = &sw_ring[tx_id];
 401
 402         for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
 403                 tx_pkt = *tx_pkts++;
 404                 pkt_len = tx_pkt->pkt_len;
 405
 406                 RTE_MBUF_PREFETCH_TO_FREE(txe->mbuf);
 407
 408                 /*
 409                  * The number of descriptors that must be allocated for a
 410                  * packet is the number of segments of that packet, plus 1
 411                  * Context Descriptor for the VLAN Tag Identifier, if any.
 412                  * Determine the last TX descriptor to allocate in the TX ring
 413                  * for the packet, starting from the current position (tx_id)
 414                  * in the ring.
 415                  */
 416                 tx_last = (uint16_t) (tx_id + tx_pkt->nb_segs - 1);
 417
 418                 ol_flags = tx_pkt->ol_flags;
 419                 tx_ol_req = ol_flags & IGB_TX_OFFLOAD_MASK;
 420
 421                 /* If a Context Descriptor need be built . */
 422                 if (tx_ol_req) {
 423                         tx_offload.l2_len = tx_pkt->l2_len;
 424                         tx_offload.l3_len = tx_pkt->l3_len;
 425                         tx_offload.l4_len = tx_pkt->l4_len;
 426                         tx_offload.vlan_tci = tx_pkt->vlan_tci;
 427                         tx_offload.tso_segsz = tx_pkt->tso_segsz;
 428                         tx_ol_req = check_tso_para(tx_ol_req, tx_offload);
 429
 430                         ctx = what_advctx_update(txq, tx_ol_req, tx_offload);
 431                         /* Only allocate context descriptor if required*/
 432                         new_ctx = (ctx == IGB_CTX_NUM);
 433                         ctx = txq->ctx_curr + txq->ctx_start;
 434                         tx_last = (uint16_t) (tx_last + new_ctx);
 435                 }
 436                 if (tx_last >= txq->nb_tx_desc)
 437                         tx_last = (uint16_t) (tx_last - txq->nb_tx_desc);
 438
 439                 PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u pktlen=%u"
 440                            " tx_first=%u tx_last=%u",
 441                            (unsigned) txq->port_id,
 442                            (unsigned) txq->queue_id,
 443                            (unsigned) pkt_len,
 444                            (unsigned) tx_id,
 445                            (unsigned) tx_last);
 446
 447                 /*
 448                  * Check if there are enough free descriptors in the TX ring
 449                  * to transmit the next packet.
 450                  * This operation is based on the two following rules:
 451                  *
 452                  *   1- Only check that the last needed TX descriptor can be
 453                  *      allocated (by construction, if that descriptor is free,
 454                  *      all intermediate ones are also free).
 455                  *
 456                  *      For this purpose, the index of the last TX descriptor
 457                  *      used for a packet (the "last descriptor" of a packet)
 458                  *      is recorded in the TX entries (the last one included)
 459                  *      that are associated with all TX descriptors allocated
 460                  *      for that packet.
 461                  *
 462                  *   2- Avoid to allocate the last free TX descriptor of the
 463                  *      ring, in order to never set the TDT register with the
 464                  *      same value stored in parallel by the NIC in the TDH
 465                  *      register, which makes the TX engine of the NIC enter
 466                  *      in a deadlock situation.
 467                  *
 468                  *      By extension, avoid to allocate a free descriptor that
 469                  *      belongs to the last set of free descriptors allocated
 470                  *      to the same packet previously transmitted.
 471                  */
 472
 473                 /*
 474                  * The "last descriptor" of the previously sent packet, if any,
 475                  * which used the last descriptor to allocate.
 476                  */
 477                 tx_end = sw_ring[tx_last].last_id;
 478
 479                 /*
 480                  * The next descriptor following that "last descriptor" in the
 481                  * ring.
 482                  */
 483                 tx_end = sw_ring[tx_end].next_id;
 484
 485                 /*
 486                  * The "last descriptor" associated with that next descriptor.
 487                  */
 488                 tx_end = sw_ring[tx_end].last_id;
 489
 490                 /*
 491                  * Check that this descriptor is free.
 492                  */
 493                 if (! (txr[tx_end].wb.status & E1000_TXD_STAT_DD)) {
 494                         if (nb_tx == 0)
 495                                 return 0;
 496                         goto end_of_tx;
 497                 }
 498
 499                 /*
 500                  * Set common flags of all TX Data Descriptors.
 501                  *
 502                  * The following bits must be set in all Data Descriptors:
 503                  *   - E1000_ADVTXD_DTYP_DATA
 504                  *   - E1000_ADVTXD_DCMD_DEXT
 505                  *
 506                  * The following bits must be set in the first Data Descriptor
 507                  * and are ignored in the other ones:
 508                  *   - E1000_ADVTXD_DCMD_IFCS
 509                  *   - E1000_ADVTXD_MAC_1588
 510                  *   - E1000_ADVTXD_DCMD_VLE
 511                  *
 512                  * The following bits must only be set in the last Data
 513                  * Descriptor:
 514                  *   - E1000_TXD_CMD_EOP
 515                  *
 516                  * The following bits can be set in any Data Descriptor, but
 517                  * are only set in the last Data Descriptor:
 518                  *   - E1000_TXD_CMD_RS
 519                  */
 520                 cmd_type_len = txq->txd_type |
 521                         E1000_ADVTXD_DCMD_IFCS | E1000_ADVTXD_DCMD_DEXT;
 522                 if (tx_ol_req & PKT_TX_TCP_SEG)
 523                         pkt_len -= (tx_pkt->l2_len + tx_pkt->l3_len + tx_pkt->l4_len);
 524                 olinfo_status = (pkt_len << E1000_ADVTXD_PAYLEN_SHIFT);
 525 #if defined(RTE_LIBRTE_IEEE1588)
 526                 if (ol_flags & PKT_TX_IEEE1588_TMST)
 527                         cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP;
 528 #endif
 529                 if (tx_ol_req) {
 530                         /* Setup TX Advanced context descriptor if required */
 531                         if (new_ctx) {
 532                                 volatile struct e1000_adv_tx_context_desc *
 533                                     ctx_txd;
 534
 535                                 ctx_txd = (volatile struct
 536                                     e1000_adv_tx_context_desc *)
 537                                     &txr[tx_id];
 538
 539                                 txn = &sw_ring[txe->next_id];
 540                                 RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
 541
 542                                 if (txe->mbuf != NULL) {
 543                                         rte_pktmbuf_free_seg(txe->mbuf);
 544                                         txe->mbuf = NULL;
 545                                 }
 546
 547                                 igbe_set_xmit_ctx(txq, ctx_txd, tx_ol_req, tx_offload);
 548
 549                                 txe->last_id = tx_last;
 550                                 tx_id = txe->next_id;
 551                                 txe = txn;
 552                         }
 553
 554                         /* Setup the TX Advanced Data Descriptor */
 555                         cmd_type_len  |= tx_desc_vlan_flags_to_cmdtype(tx_ol_req);
 556                         olinfo_status |= tx_desc_cksum_flags_to_olinfo(tx_ol_req);
 557                         olinfo_status |= (ctx << E1000_ADVTXD_IDX_SHIFT);
 558                 }
 559
 560                 m_seg = tx_pkt;
 561                 do {
 562                         txn = &sw_ring[txe->next_id];
 563                         txd = &txr[tx_id];
 564
 565                         if (txe->mbuf != NULL)
 566                                 rte_pktmbuf_free_seg(txe->mbuf);
 567                         txe->mbuf = m_seg;
 568
 569                         /*
 570                          * Set up transmit descriptor.
 571                          */
 572                         slen = (uint16_t) m_seg->data_len;
 573                         buf_dma_addr = rte_mbuf_data_iova(m_seg);
 574                         txd->read.buffer_addr =
 575                                 rte_cpu_to_le_64(buf_dma_addr);
 576                         txd->read.cmd_type_len =
 577                                 rte_cpu_to_le_32(cmd_type_len | slen);
 578                         txd->read.olinfo_status =
 579                                 rte_cpu_to_le_32(olinfo_status);
 580                         txe->last_id = tx_last;
 581                         tx_id = txe->next_id;
 582                         txe = txn;
 583                         m_seg = m_seg->next;
 584                 } while (m_seg != NULL);
 585
 586                 /*
 587                  * The last packet data descriptor needs End Of Packet (EOP)
 588                  * and Report Status (RS).
 589                  */
 590                 txd->read.cmd_type_len |=
 591                         rte_cpu_to_le_32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS);
 592         }
 593  end_of_tx:
 594         rte_wmb();
 595
 596         /*
 597          * Set the Transmit Descriptor Tail (TDT).
 598          */
 599         E1000_PCI_REG_WRITE_RELAXED(txq->tdt_reg_addr, tx_id);
 600         PMD_TX_LOG(DEBUG, "port_id=%u queue_id=%u tx_tail=%u nb_tx=%u",
 601                    (unsigned) txq->port_id, (unsigned) txq->queue_id,
 602                    (unsigned) tx_id, (unsigned) nb_tx);
 603         txq->tx_tail = tx_id;
 604
 605         return nb_tx;
 606 }
 607
 608 /*********************************************************************
 609  *
 610  *  TX prep functions
 611  *
 612  **********************************************************************/
 613 uint16_t
 614 eth_igb_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 615                 uint16_t nb_pkts)
 616 {
 617         int i, ret;
 618         struct rte_mbuf *m;
 619
 620         for (i = 0; i < nb_pkts; i++) {
 621                 m = tx_pkts[i];
 622
 623                 /* Check some limitations for TSO in hardware */
 624                 if (m->ol_flags & PKT_TX_TCP_SEG)
 625                         if ((m->tso_segsz > IGB_TSO_MAX_MSS) ||
 626                                         (m->l2_len + m->l3_len + m->l4_len >
 627                                         IGB_TSO_MAX_HDRLEN)) {
 628                                 rte_errno = -EINVAL;
 629                                 return i;
 630                         }
 631
 632                 if (m->ol_flags & IGB_TX_OFFLOAD_NOTSUP_MASK) {
 633                         rte_errno = -ENOTSUP;
 634                         return i;
 635                 }
 636
 637 #ifdef RTE_LIBRTE_ETHDEV_DEBUG
 638                 ret = rte_validate_tx_offload(m);
 639                 if (ret != 0) {
 640                         rte_errno = ret;
 641                         return i;
 642                 }
 643 #endif
 644                 ret = rte_net_intel_cksum_prepare(m);
 645                 if (ret != 0) {
 646                         rte_errno = ret;
 647                         return i;
 648                 }
 649         }
 650
 651         return i;
 652 }
 653
 654 /*********************************************************************
 655  *
 656  *  RX functions
 657  *
 658  **********************************************************************/
 659 #define IGB_PACKET_TYPE_IPV4              0X01
 660 #define IGB_PACKET_TYPE_IPV4_TCP          0X11
 661 #define IGB_PACKET_TYPE_IPV4_UDP          0X21
 662 #define IGB_PACKET_TYPE_IPV4_SCTP         0X41
 663 #define IGB_PACKET_TYPE_IPV4_EXT          0X03
 664 #define IGB_PACKET_TYPE_IPV4_EXT_SCTP     0X43
 665 #define IGB_PACKET_TYPE_IPV6              0X04
 666 #define IGB_PACKET_TYPE_IPV6_TCP          0X14
 667 #define IGB_PACKET_TYPE_IPV6_UDP          0X24
 668 #define IGB_PACKET_TYPE_IPV6_EXT          0X0C
 669 #define IGB_PACKET_TYPE_IPV6_EXT_TCP      0X1C
 670 #define IGB_PACKET_TYPE_IPV6_EXT_UDP      0X2C
 671 #define IGB_PACKET_TYPE_IPV4_IPV6         0X05
 672 #define IGB_PACKET_TYPE_IPV4_IPV6_TCP     0X15
 673 #define IGB_PACKET_TYPE_IPV4_IPV6_UDP     0X25
 674 #define IGB_PACKET_TYPE_IPV4_IPV6_EXT     0X0D
 675 #define IGB_PACKET_TYPE_IPV4_IPV6_EXT_TCP 0X1D
 676 #define IGB_PACKET_TYPE_IPV4_IPV6_EXT_UDP 0X2D
 677 #define IGB_PACKET_TYPE_MAX               0X80
 678 #define IGB_PACKET_TYPE_MASK              0X7F
 679 #define IGB_PACKET_TYPE_SHIFT             0X04
 680 static inline uint32_t
 681 igb_rxd_pkt_info_to_pkt_type(uint16_t pkt_info)
 682 {
 683         static const uint32_t
 684                 ptype_table[IGB_PACKET_TYPE_MAX] __rte_cache_aligned = {
 685                 [IGB_PACKET_TYPE_IPV4] = RTE_PTYPE_L2_ETHER |
 686                         RTE_PTYPE_L3_IPV4,
 687                 [IGB_PACKET_TYPE_IPV4_EXT] = RTE_PTYPE_L2_ETHER |
 688                         RTE_PTYPE_L3_IPV4_EXT,
 689                 [IGB_PACKET_TYPE_IPV6] = RTE_PTYPE_L2_ETHER |
 690                         RTE_PTYPE_L3_IPV6,
 691                 [IGB_PACKET_TYPE_IPV4_IPV6] = RTE_PTYPE_L2_ETHER |
 692                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 693                         RTE_PTYPE_INNER_L3_IPV6,
 694                 [IGB_PACKET_TYPE_IPV6_EXT] = RTE_PTYPE_L2_ETHER |
 695                         RTE_PTYPE_L3_IPV6_EXT,
 696                 [IGB_PACKET_TYPE_IPV4_IPV6_EXT] = RTE_PTYPE_L2_ETHER |
 697                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 698                         RTE_PTYPE_INNER_L3_IPV6_EXT,
 699                 [IGB_PACKET_TYPE_IPV4_TCP] = RTE_PTYPE_L2_ETHER |
 700                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_TCP,
 701                 [IGB_PACKET_TYPE_IPV6_TCP] = RTE_PTYPE_L2_ETHER |
 702                         RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_TCP,
 703                 [IGB_PACKET_TYPE_IPV4_IPV6_TCP] = RTE_PTYPE_L2_ETHER |
 704                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 705                         RTE_PTYPE_INNER_L3_IPV6 | RTE_PTYPE_INNER_L4_TCP,
 706                 [IGB_PACKET_TYPE_IPV6_EXT_TCP] = RTE_PTYPE_L2_ETHER |
 707                         RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_TCP,
 708                 [IGB_PACKET_TYPE_IPV4_IPV6_EXT_TCP] = RTE_PTYPE_L2_ETHER |
 709                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 710                         RTE_PTYPE_INNER_L3_IPV6_EXT | RTE_PTYPE_INNER_L4_TCP,
 711                 [IGB_PACKET_TYPE_IPV4_UDP] = RTE_PTYPE_L2_ETHER |
 712                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_UDP,
 713                 [IGB_PACKET_TYPE_IPV6_UDP] = RTE_PTYPE_L2_ETHER |
 714                         RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_UDP,
 715                 [IGB_PACKET_TYPE_IPV4_IPV6_UDP] =  RTE_PTYPE_L2_ETHER |
 716                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 717                         RTE_PTYPE_INNER_L3_IPV6 | RTE_PTYPE_INNER_L4_UDP,
 718                 [IGB_PACKET_TYPE_IPV6_EXT_UDP] = RTE_PTYPE_L2_ETHER |
 719                         RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_UDP,
 720                 [IGB_PACKET_TYPE_IPV4_IPV6_EXT_UDP] = RTE_PTYPE_L2_ETHER |
 721                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_IP |
 722                         RTE_PTYPE_INNER_L3_IPV6_EXT | RTE_PTYPE_INNER_L4_UDP,
 723                 [IGB_PACKET_TYPE_IPV4_SCTP] = RTE_PTYPE_L2_ETHER |
 724                         RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_SCTP,
 725                 [IGB_PACKET_TYPE_IPV4_EXT_SCTP] = RTE_PTYPE_L2_ETHER |
 726                         RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_L4_SCTP,
 727         };
 728         if (unlikely(pkt_info & E1000_RXDADV_PKTTYPE_ETQF))
 729                 return RTE_PTYPE_UNKNOWN;
 730
 731         pkt_info = (pkt_info >> IGB_PACKET_TYPE_SHIFT) & IGB_PACKET_TYPE_MASK;
 732
 733         return ptype_table[pkt_info];
 734 }
 735
 736 static inline uint64_t
 737 rx_desc_hlen_type_rss_to_pkt_flags(struct igb_rx_queue *rxq, uint32_t hl_tp_rs)
 738 {
 739         uint64_t pkt_flags = ((hl_tp_rs & 0x0F) == 0) ?  0 : PKT_RX_RSS_HASH;
 740
 741 #if defined(RTE_LIBRTE_IEEE1588)
 742         static uint32_t ip_pkt_etqf_map[8] = {
 743                 0, 0, 0, PKT_RX_IEEE1588_PTP,
 744                 0, 0, 0, 0,
 745         };
 746
 747         struct rte_eth_dev dev = rte_eth_devices[rxq->port_id];
 748         struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev.data->dev_private);
 749
 750         /* EtherType is in bits 8:10 in Packet Type, and not in the default 0:2 */
 751         if (hw->mac.type == e1000_i210)
 752                 pkt_flags |= ip_pkt_etqf_map[(hl_tp_rs >> 12) & 0x07];
 753         else
 754                 pkt_flags |= ip_pkt_etqf_map[(hl_tp_rs >> 4) & 0x07];
 755 #else
 756         RTE_SET_USED(rxq);
 757 #endif
 758
 759         return pkt_flags;
 760 }
 761
 762 static inline uint64_t
 763 rx_desc_status_to_pkt_flags(uint32_t rx_status)
 764 {
 765         uint64_t pkt_flags;
 766
 767         /* Check if VLAN present */
 768         pkt_flags = ((rx_status & E1000_RXD_STAT_VP) ?
 769                 PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED : 0);
 770
 771 #if defined(RTE_LIBRTE_IEEE1588)
 772         if (rx_status & E1000_RXD_STAT_TMST)
 773                 pkt_flags = pkt_flags | PKT_RX_IEEE1588_TMST;
 774 #endif
 775         return pkt_flags;
 776 }
 777
 778 static inline uint64_t
 779 rx_desc_error_to_pkt_flags(uint32_t rx_status)
 780 {
 781         /*
 782          * Bit 30: IPE, IPv4 checksum error
 783          * Bit 29: L4I, L4I integrity error
 784          */
 785
 786         static uint64_t error_to_pkt_flags_map[4] = {
 787                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD,
 788                 PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
 789                 PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD,
 790                 PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD
 791         };
 792         return error_to_pkt_flags_map[(rx_status >>
 793                 E1000_RXD_ERR_CKSUM_BIT) & E1000_RXD_ERR_CKSUM_MSK];
 794 }
 795
 796 uint16_t
 797 eth_igb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 798                uint16_t nb_pkts)
 799 {
 800         struct igb_rx_queue *rxq;
 801         volatile union e1000_adv_rx_desc *rx_ring;
 802         volatile union e1000_adv_rx_desc *rxdp;
 803         struct igb_rx_entry *sw_ring;
 804         struct igb_rx_entry *rxe;
 805         struct rte_mbuf *rxm;
 806         struct rte_mbuf *nmb;
 807         union e1000_adv_rx_desc rxd;
 808         uint64_t dma_addr;
 809         uint32_t staterr;
 810         uint32_t hlen_type_rss;
 811         uint16_t pkt_len;
 812         uint16_t rx_id;
 813         uint16_t nb_rx;
 814         uint16_t nb_hold;
 815         uint64_t pkt_flags;
 816
 817         nb_rx = 0;
 818         nb_hold = 0;
 819         rxq = rx_queue;
 820         rx_id = rxq->rx_tail;
 821         rx_ring = rxq->rx_ring;
 822         sw_ring = rxq->sw_ring;
 823         while (nb_rx < nb_pkts) {
 824                 /*
 825                  * The order of operations here is important as the DD status
 826                  * bit must not be read after any other descriptor fields.
 827                  * rx_ring and rxdp are pointing to volatile data so the order
 828                  * of accesses cannot be reordered by the compiler. If they were
 829                  * not volatile, they could be reordered which could lead to
 830                  * using invalid descriptor fields when read from rxd.
 831                  */
 832                 rxdp = &rx_ring[rx_id];
 833                 staterr = rxdp->wb.upper.status_error;
 834                 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
 835                         break;
 836                 rxd = *rxdp;
 837
 838                 /*
 839                  * End of packet.
 840                  *
 841                  * If the E1000_RXD_STAT_EOP flag is not set, the RX packet is
 842                  * likely to be invalid and to be dropped by the various
 843                  * validation checks performed by the network stack.
 844                  *
 845                  * Allocate a new mbuf to replenish the RX ring descriptor.
 846                  * If the allocation fails:
 847                  *    - arrange for that RX descriptor to be the first one
 848                  *      being parsed the next time the receive function is
 849                  *      invoked [on the same queue].
 850                  *
 851                  *    - Stop parsing the RX ring and return immediately.
 852                  *
 853                  * This policy do not drop the packet received in the RX
 854                  * descriptor for which the allocation of a new mbuf failed.
 855                  * Thus, it allows that packet to be later retrieved if
 856                  * mbuf have been freed in the mean time.
 857                  * As a side effect, holding RX descriptors instead of
 858                  * systematically giving them back to the NIC may lead to
 859                  * RX ring exhaustion situations.
 860                  * However, the NIC can gracefully prevent such situations
 861                  * to happen by sending specific "back-pressure" flow control
 862                  * frames to its peer(s).
 863                  */
 864                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u "
 865                            "staterr=0x%x pkt_len=%u",
 866                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
 867                            (unsigned) rx_id, (unsigned) staterr,
 868                            (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
 869
 870                 nmb = rte_mbuf_raw_alloc(rxq->mb_pool);
 871                 if (nmb == NULL) {
 872                         PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
 873                                    "queue_id=%u", (unsigned) rxq->port_id,
 874                                    (unsigned) rxq->queue_id);
 875                         rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
 876                         break;
 877                 }
 878
 879                 nb_hold++;
 880                 rxe = &sw_ring[rx_id];
 881                 rx_id++;
 882                 if (rx_id == rxq->nb_rx_desc)
 883                         rx_id = 0;
 884
 885                 /* Prefetch next mbuf while processing current one. */
 886                 rte_igb_prefetch(sw_ring[rx_id].mbuf);
 887
 888                 /*
 889                  * When next RX descriptor is on a cache-line boundary,
 890                  * prefetch the next 4 RX descriptors and the next 8 pointers
 891                  * to mbufs.
 892                  */
 893                 if ((rx_id & 0x3) == 0) {
 894                         rte_igb_prefetch(&rx_ring[rx_id]);
 895                         rte_igb_prefetch(&sw_ring[rx_id]);
 896                 }
 897
 898                 rxm = rxe->mbuf;
 899                 rxe->mbuf = nmb;
 900                 dma_addr =
 901                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));
 902                 rxdp->read.hdr_addr = 0;
 903                 rxdp->read.pkt_addr = dma_addr;
 904
 905                 /*
 906                  * Initialize the returned mbuf.
 907                  * 1) setup generic mbuf fields:
 908                  *    - number of segments,
 909                  *    - next segment,
 910                  *    - packet length,
 911                  *    - RX port identifier.
 912                  * 2) integrate hardware offload data, if any:
 913                  *    - RSS flag & hash,
 914                  *    - IP checksum flag,
 915                  *    - VLAN TCI, if any,
 916                  *    - error flags.
 917                  */
 918                 pkt_len = (uint16_t) (rte_le_to_cpu_16(rxd.wb.upper.length) -
 919                                       rxq->crc_len);
 920                 rxm->data_off = RTE_PKTMBUF_HEADROOM;
 921                 rte_packet_prefetch((char *)rxm->buf_addr + rxm->data_off);
 922                 rxm->nb_segs = 1;
 923                 rxm->next = NULL;
 924                 rxm->pkt_len = pkt_len;
 925                 rxm->data_len = pkt_len;
 926                 rxm->port = rxq->port_id;
 927
 928                 rxm->hash.rss = rxd.wb.lower.hi_dword.rss;
 929                 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
 930
 931                 /*
 932                  * The vlan_tci field is only valid when PKT_RX_VLAN is
 933                  * set in the pkt_flags field and must be in CPU byte order.
 934                  */
 935                 if ((staterr & rte_cpu_to_le_32(E1000_RXDEXT_STATERR_LB)) &&
 936                                 (rxq->flags & IGB_RXQ_FLAG_LB_BSWAP_VLAN)) {
 937                         rxm->vlan_tci = rte_be_to_cpu_16(rxd.wb.upper.vlan);
 938                 } else {
 939                         rxm->vlan_tci = rte_le_to_cpu_16(rxd.wb.upper.vlan);
 940                 }
 941                 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(rxq, hlen_type_rss);
 942                 pkt_flags = pkt_flags | rx_desc_status_to_pkt_flags(staterr);
 943                 pkt_flags = pkt_flags | rx_desc_error_to_pkt_flags(staterr);
 944                 rxm->ol_flags = pkt_flags;
 945                 rxm->packet_type = igb_rxd_pkt_info_to_pkt_type(rxd.wb.lower.
 946                                                 lo_dword.hs_rss.pkt_info);
 947
 948                 /*
 949                  * Store the mbuf address into the next entry of the array
 950                  * of returned packets.
 951                  */
 952                 rx_pkts[nb_rx++] = rxm;
 953         }
 954         rxq->rx_tail = rx_id;
 955
 956         /*
 957          * If the number of free RX descriptors is greater than the RX free
 958          * threshold of the queue, advance the Receive Descriptor Tail (RDT)
 959          * register.
 960          * Update the RDT with the value of the last processed RX descriptor
 961          * minus 1, to guarantee that the RDT register is never equal to the
 962          * RDH register, which creates a "full" ring situtation from the
 963          * hardware point of view...
 964          */
 965         nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
 966         if (nb_hold > rxq->rx_free_thresh) {
 967                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
 968                            "nb_hold=%u nb_rx=%u",
 969                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
 970                            (unsigned) rx_id, (unsigned) nb_hold,
 971                            (unsigned) nb_rx);
 972                 rx_id = (uint16_t) ((rx_id == 0) ?
 973                                      (rxq->nb_rx_desc - 1) : (rx_id - 1));
 974                 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
 975                 nb_hold = 0;
 976         }
 977         rxq->nb_rx_hold = nb_hold;
 978         return nb_rx;
 979 }
 980
 981 uint16_t
 982 eth_igb_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 983                          uint16_t nb_pkts)
 984 {
 985         struct igb_rx_queue *rxq;
 986         volatile union e1000_adv_rx_desc *rx_ring;
 987         volatile union e1000_adv_rx_desc *rxdp;
 988         struct igb_rx_entry *sw_ring;
 989         struct igb_rx_entry *rxe;
 990         struct rte_mbuf *first_seg;
 991         struct rte_mbuf *last_seg;
 992         struct rte_mbuf *rxm;
 993         struct rte_mbuf *nmb;
 994         union e1000_adv_rx_desc rxd;
 995         uint64_t dma; /* Physical address of mbuf data buffer */
 996         uint32_t staterr;
 997         uint32_t hlen_type_rss;
 998         uint16_t rx_id;
 999         uint16_t nb_rx;
1000         uint16_t nb_hold;
1001         uint16_t data_len;
1002         uint64_t pkt_flags;
1003
1004         nb_rx = 0;
1005         nb_hold = 0;
1006         rxq = rx_queue;
1007         rx_id = rxq->rx_tail;
1008         rx_ring = rxq->rx_ring;
1009         sw_ring = rxq->sw_ring;
1010
1011         /*
1012          * Retrieve RX context of current packet, if any.
1013          */
1014         first_seg = rxq->pkt_first_seg;
1015         last_seg = rxq->pkt_last_seg;
1016
1017         while (nb_rx < nb_pkts) {
1018         next_desc:
1019                 /*
1020                  * The order of operations here is important as the DD status
1021                  * bit must not be read after any other descriptor fields.
1022                  * rx_ring and rxdp are pointing to volatile data so the order
1023                  * of accesses cannot be reordered by the compiler. If they were
1024                  * not volatile, they could be reordered which could lead to
1025                  * using invalid descriptor fields when read from rxd.
1026                  */
1027                 rxdp = &rx_ring[rx_id];
1028                 staterr = rxdp->wb.upper.status_error;
1029                 if (! (staterr & rte_cpu_to_le_32(E1000_RXD_STAT_DD)))
1030                         break;
1031                 rxd = *rxdp;
1032
1033                 /*
1034                  * Descriptor done.
1035                  *
1036                  * Allocate a new mbuf to replenish the RX ring descriptor.
1037                  * If the allocation fails:
1038                  *    - arrange for that RX descriptor to be the first one
1039                  *      being parsed the next time the receive function is
1040                  *      invoked [on the same queue].
1041                  *
1042                  *    - Stop parsing the RX ring and return immediately.
1043                  *
1044                  * This policy does not drop the packet received in the RX
1045                  * descriptor for which the allocation of a new mbuf failed.
1046                  * Thus, it allows that packet to be later retrieved if
1047                  * mbuf have been freed in the mean time.
1048                  * As a side effect, holding RX descriptors instead of
1049                  * systematically giving them back to the NIC may lead to
1050                  * RX ring exhaustion situations.
1051                  * However, the NIC can gracefully prevent such situations
1052                  * to happen by sending specific "back-pressure" flow control
1053                  * frames to its peer(s).
1054                  */
1055                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u "
1056                            "staterr=0x%x data_len=%u",
1057                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
1058                            (unsigned) rx_id, (unsigned) staterr,
1059                            (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
1060
1061                 nmb = rte_mbuf_raw_alloc(rxq->mb_pool);
1062                 if (nmb == NULL) {
1063                         PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
1064                                    "queue_id=%u", (unsigned) rxq->port_id,
1065                                    (unsigned) rxq->queue_id);
1066                         rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
1067                         break;
1068                 }
1069
1070                 nb_hold++;
1071                 rxe = &sw_ring[rx_id];
1072                 rx_id++;
1073                 if (rx_id == rxq->nb_rx_desc)
1074                         rx_id = 0;
1075
1076                 /* Prefetch next mbuf while processing current one. */
1077                 rte_igb_prefetch(sw_ring[rx_id].mbuf);
1078
1079                 /*
1080                  * When next RX descriptor is on a cache-line boundary,
1081                  * prefetch the next 4 RX descriptors and the next 8 pointers
1082                  * to mbufs.
1083                  */
1084                 if ((rx_id & 0x3) == 0) {
1085                         rte_igb_prefetch(&rx_ring[rx_id]);
1086                         rte_igb_prefetch(&sw_ring[rx_id]);
1087                 }
1088
1089                 /*
1090                  * Update RX descriptor with the physical address of the new
1091                  * data buffer of the new allocated mbuf.
1092                  */
1093                 rxm = rxe->mbuf;
1094                 rxe->mbuf = nmb;
1095                 dma = rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));
1096                 rxdp->read.pkt_addr = dma;
1097                 rxdp->read.hdr_addr = 0;
1098
1099                 /*
1100                  * Set data length & data buffer address of mbuf.
1101                  */
1102                 data_len = rte_le_to_cpu_16(rxd.wb.upper.length);
1103                 rxm->data_len = data_len;
1104                 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1105
1106                 /*
1107                  * If this is the first buffer of the received packet,
1108                  * set the pointer to the first mbuf of the packet and
1109                  * initialize its context.
1110                  * Otherwise, update the total length and the number of segments
1111                  * of the current scattered packet, and update the pointer to
1112                  * the last mbuf of the current packet.
1113                  */
1114                 if (first_seg == NULL) {
1115                         first_seg = rxm;
1116                         first_seg->pkt_len = data_len;
1117                         first_seg->nb_segs = 1;
1118                 } else {
1119                         first_seg->pkt_len += data_len;
1120                         first_seg->nb_segs++;
1121                         last_seg->next = rxm;
1122                 }
1123
1124                 /*
1125                  * If this is not the last buffer of the received packet,
1126                  * update the pointer to the last mbuf of the current scattered
1127                  * packet and continue to parse the RX ring.
1128                  */
1129                 if (! (staterr & E1000_RXD_STAT_EOP)) {
1130                         last_seg = rxm;
1131                         goto next_desc;
1132                 }
1133
1134                 /*
1135                  * This is the last buffer of the received packet.
1136                  * If the CRC is not stripped by the hardware:
1137                  *   - Subtract the CRC length from the total packet length.
1138                  *   - If the last buffer only contains the whole CRC or a part
1139                  *     of it, free the mbuf associated to the last buffer.
1140                  *     If part of the CRC is also contained in the previous
1141                  *     mbuf, subtract the length of that CRC part from the
1142                  *     data length of the previous mbuf.
1143                  */
1144                 rxm->next = NULL;
1145                 if (unlikely(rxq->crc_len > 0)) {
1146                         first_seg->pkt_len -= ETHER_CRC_LEN;
1147                         if (data_len <= ETHER_CRC_LEN) {
1148                                 rte_pktmbuf_free_seg(rxm);
1149                                 first_seg->nb_segs--;
1150                                 last_seg->data_len = (uint16_t)
1151                                         (last_seg->data_len -
1152                                          (ETHER_CRC_LEN - data_len));
1153                                 last_seg->next = NULL;
1154                         } else
1155                                 rxm->data_len =
1156                                         (uint16_t) (data_len - ETHER_CRC_LEN);
1157                 }
1158
1159                 /*
1160                  * Initialize the first mbuf of the returned packet:
1161                  *    - RX port identifier,
1162                  *    - hardware offload data, if any:
1163                  *      - RSS flag & hash,
1164                  *      - IP checksum flag,
1165                  *      - VLAN TCI, if any,
1166                  *      - error flags.
1167                  */
1168                 first_seg->port = rxq->port_id;
1169                 first_seg->hash.rss = rxd.wb.lower.hi_dword.rss;
1170
1171                 /*
1172                  * The vlan_tci field is only valid when PKT_RX_VLAN is
1173                  * set in the pkt_flags field and must be in CPU byte order.
1174                  */
1175                 if ((staterr & rte_cpu_to_le_32(E1000_RXDEXT_STATERR_LB)) &&
1176                                 (rxq->flags & IGB_RXQ_FLAG_LB_BSWAP_VLAN)) {
1177                         first_seg->vlan_tci =
1178                                 rte_be_to_cpu_16(rxd.wb.upper.vlan);
1179                 } else {
1180                         first_seg->vlan_tci =
1181                                 rte_le_to_cpu_16(rxd.wb.upper.vlan);
1182                 }
1183                 hlen_type_rss = rte_le_to_cpu_32(rxd.wb.lower.lo_dword.data);
1184                 pkt_flags = rx_desc_hlen_type_rss_to_pkt_flags(rxq, hlen_type_rss);
1185                 pkt_flags = pkt_flags | rx_desc_status_to_pkt_flags(staterr);
1186                 pkt_flags = pkt_flags | rx_desc_error_to_pkt_flags(staterr);
1187                 first_seg->ol_flags = pkt_flags;
1188                 first_seg->packet_type = igb_rxd_pkt_info_to_pkt_type(rxd.wb.
1189                                         lower.lo_dword.hs_rss.pkt_info);
1190
1191                 /* Prefetch data of first segment, if configured to do so. */
1192                 rte_packet_prefetch((char *)first_seg->buf_addr +
1193                         first_seg->data_off);
1194
1195                 /*
1196                  * Store the mbuf address into the next entry of the array
1197                  * of returned packets.
1198                  */
1199                 rx_pkts[nb_rx++] = first_seg;
1200
1201                 /*
1202                  * Setup receipt context for a new packet.
1203                  */
1204                 first_seg = NULL;
1205         }
1206
1207         /*
1208          * Record index of the next RX descriptor to probe.
1209          */
1210         rxq->rx_tail = rx_id;
1211
1212         /*
1213          * Save receive context.
1214          */
1215         rxq->pkt_first_seg = first_seg;
1216         rxq->pkt_last_seg = last_seg;
1217
1218         /*
1219          * If the number of free RX descriptors is greater than the RX free
1220          * threshold of the queue, advance the Receive Descriptor Tail (RDT)
1221          * register.
1222          * Update the RDT with the value of the last processed RX descriptor
1223          * minus 1, to guarantee that the RDT register is never equal to the
1224          * RDH register, which creates a "full" ring situtation from the
1225          * hardware point of view...
1226          */
1227         nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
1228         if (nb_hold > rxq->rx_free_thresh) {
1229                 PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
1230                            "nb_hold=%u nb_rx=%u",
1231                            (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
1232                            (unsigned) rx_id, (unsigned) nb_hold,
1233                            (unsigned) nb_rx);
1234                 rx_id = (uint16_t) ((rx_id == 0) ?
1235                                      (rxq->nb_rx_desc - 1) : (rx_id - 1));
1236                 E1000_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
1237                 nb_hold = 0;
1238         }
1239         rxq->nb_rx_hold = nb_hold;
1240         return nb_rx;
1241 }
1242
1243 /*
1244  * Maximum number of Ring Descriptors.
1245  *
1246  * Since RDLEN/TDLEN should be multiple of 128bytes, the number of ring
1247  * desscriptors should meet the following condition:
1248  *      (num_ring_desc * sizeof(struct e1000_rx/tx_desc)) % 128 == 0
1249  */
1250
1251 static void
1252 igb_tx_queue_release_mbufs(struct igb_tx_queue *txq)
1253 {
1254         unsigned i;
1255
1256         if (txq->sw_ring != NULL) {
1257                 for (i = 0; i < txq->nb_tx_desc; i++) {
1258                         if (txq->sw_ring[i].mbuf != NULL) {
1259                                 rte_pktmbuf_free_seg(txq->sw_ring[i].mbuf);
1260                                 txq->sw_ring[i].mbuf = NULL;
1261                         }
1262                 }
1263         }
1264 }
1265
1266 static void
1267 igb_tx_queue_release(struct igb_tx_queue *txq)
1268 {
1269         if (txq != NULL) {
1270                 igb_tx_queue_release_mbufs(txq);
1271                 rte_free(txq->sw_ring);
1272                 rte_free(txq);
1273         }
1274 }
1275
1276 void
1277 eth_igb_tx_queue_release(void *txq)
1278 {
1279         igb_tx_queue_release(txq);
1280 }
1281
1282 static int
1283 igb_tx_done_cleanup(struct igb_tx_queue *txq, uint32_t free_cnt)
1284 {
1285         struct igb_tx_entry *sw_ring;
1286         volatile union e1000_adv_tx_desc *txr;
1287         uint16_t tx_first; /* First segment analyzed. */
1288         uint16_t tx_id;    /* Current segment being processed. */
1289         uint16_t tx_last;  /* Last segment in the current packet. */
1290         uint16_t tx_next;  /* First segment of the next packet. */
1291         int count;
1292
1293         if (txq != NULL) {
1294                 count = 0;
1295                 sw_ring = txq->sw_ring;
1296                 txr = txq->tx_ring;
1297
1298                 /*
1299                  * tx_tail is the last sent packet on the sw_ring. Goto the end
1300                  * of that packet (the last segment in the packet chain) and
1301                  * then the next segment will be the start of the oldest segment
1302                  * in the sw_ring. This is the first packet that will be
1303                  * attempted to be freed.
1304                  */
1305
1306                 /* Get last segment in most recently added packet. */
1307                 tx_first = sw_ring[txq->tx_tail].last_id;
1308
1309                 /* Get the next segment, which is the oldest segment in ring. */
1310                 tx_first = sw_ring[tx_first].next_id;
1311
1312                 /* Set the current index to the first. */
1313                 tx_id = tx_first;
1314
1315                 /*
1316                  * Loop through each packet. For each packet, verify that an
1317                  * mbuf exists and that the last segment is free. If so, free
1318                  * it and move on.
1319                  */
1320                 while (1) {
1321                         tx_last = sw_ring[tx_id].last_id;
1322
1323                         if (sw_ring[tx_last].mbuf) {
1324                                 if (txr[tx_last].wb.status &
1325                                                 E1000_TXD_STAT_DD) {
1326                                         /*
1327                                          * Increment the number of packets
1328                                          * freed.
1329                                          */
1330                                         count++;
1331
1332                                         /* Get the start of the next packet. */
1333                                         tx_next = sw_ring[tx_last].next_id;
1334
1335                                         /*
1336                                          * Loop through all segments in a
1337                                          * packet.
1338                                          */
1339                                         do {
1340                                                 rte_pktmbuf_free_seg(sw_ring[tx_id].mbuf);
1341                                                 sw_ring[tx_id].mbuf = NULL;
1342                                                 sw_ring[tx_id].last_id = tx_id;
1343
1344                                                 /* Move to next segemnt. */
1345                                                 tx_id = sw_ring[tx_id].next_id;
1346
1347                                         } while (tx_id != tx_next);
1348
1349                                         if (unlikely(count == (int)free_cnt))
1350                                                 break;
1351                                 } else
1352                                         /*
1353                                          * mbuf still in use, nothing left to
1354                                          * free.
1355                                          */
1356                                         break;
1357                         } else {
1358                                 /*
1359                                  * There are multiple reasons to be here:
1360                                  * 1) All the packets on the ring have been
1361                                  *    freed - tx_id is equal to tx_first
1362                                  *    and some packets have been freed.
1363                                  *    - Done, exit
1364                                  * 2) Interfaces has not sent a rings worth of
1365                                  *    packets yet, so the segment after tail is
1366                                  *    still empty. Or a previous call to this
1367                                  *    function freed some of the segments but
1368                                  *    not all so there is a hole in the list.
1369                                  *    Hopefully this is a rare case.
1370                                  *    - Walk the list and find the next mbuf. If
1371                                  *      there isn't one, then done.
1372                                  */
1373                                 if (likely((tx_id == tx_first) && (count != 0)))
1374                                         break;
1375
1376                                 /*
1377                                  * Walk the list and find the next mbuf, if any.
1378                                  */
1379                                 do {
1380                                         /* Move to next segemnt. */
1381                                         tx_id = sw_ring[tx_id].next_id;
1382
1383                                         if (sw_ring[tx_id].mbuf)
1384                                                 break;
1385
1386                                 } while (tx_id != tx_first);
1387
1388                                 /*
1389                                  * Determine why previous loop bailed. If there
1390                                  * is not an mbuf, done.
1391                                  */
1392                                 if (sw_ring[tx_id].mbuf == NULL)
1393                                         break;
1394                         }
1395                 }
1396         } else
1397                 count = -ENODEV;
1398
1399         return count;
1400 }
1401
1402 int
1403 eth_igb_tx_done_cleanup(void *txq, uint32_t free_cnt)
1404 {
1405         return igb_tx_done_cleanup(txq, free_cnt);
1406 }
1407
1408 static void
1409 igb_reset_tx_queue_stat(struct igb_tx_queue *txq)
1410 {
1411         txq->tx_head = 0;
1412         txq->tx_tail = 0;
1413         txq->ctx_curr = 0;
1414         memset((void*)&txq->ctx_cache, 0,
1415                 IGB_CTX_NUM * sizeof(struct igb_advctx_info));
1416 }
1417
1418 static void
1419 igb_reset_tx_queue(struct igb_tx_queue *txq, struct rte_eth_dev *dev)
1420 {
1421         static const union e1000_adv_tx_desc zeroed_desc = {{0}};
1422         struct igb_tx_entry *txe = txq->sw_ring;
1423         uint16_t i, prev;
1424         struct e1000_hw *hw;
1425
1426         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1427         /* Zero out HW ring memory */
1428         for (i = 0; i < txq->nb_tx_desc; i++) {
1429                 txq->tx_ring[i] = zeroed_desc;
1430         }
1431
1432         /* Initialize ring entries */
1433         prev = (uint16_t)(txq->nb_tx_desc - 1);
1434         for (i = 0; i < txq->nb_tx_desc; i++) {
1435                 volatile union e1000_adv_tx_desc *txd = &(txq->tx_ring[i]);
1436
1437                 txd->wb.status = E1000_TXD_STAT_DD;
1438                 txe[i].mbuf = NULL;
1439                 txe[i].last_id = i;
1440                 txe[prev].next_id = i;
1441                 prev = i;
1442         }
1443
1444         txq->txd_type = E1000_ADVTXD_DTYP_DATA;
1445         /* 82575 specific, each tx queue will use 2 hw contexts */
1446         if (hw->mac.type == e1000_82575)
1447                 txq->ctx_start = txq->queue_id * IGB_CTX_NUM;
1448
1449         igb_reset_tx_queue_stat(txq);
1450 }
1451
1452 uint64_t
1453 igb_get_tx_port_offloads_capa(struct rte_eth_dev *dev)
1454 {
1455         uint64_t tx_offload_capa;
1456
1457         RTE_SET_USED(dev);
1458         tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT |
1459                           DEV_TX_OFFLOAD_IPV4_CKSUM  |
1460                           DEV_TX_OFFLOAD_UDP_CKSUM   |
1461                           DEV_TX_OFFLOAD_TCP_CKSUM   |
1462                           DEV_TX_OFFLOAD_SCTP_CKSUM  |
1463                           DEV_TX_OFFLOAD_TCP_TSO     |
1464                           DEV_TX_OFFLOAD_MULTI_SEGS;
1465
1466         return tx_offload_capa;
1467 }
1468
1469 uint64_t
1470 igb_get_tx_queue_offloads_capa(struct rte_eth_dev *dev)
1471 {
1472         uint64_t tx_queue_offload_capa;
1473
1474         tx_queue_offload_capa = igb_get_tx_port_offloads_capa(dev);
1475
1476         return tx_queue_offload_capa;
1477 }
1478
1479 int
1480 eth_igb_tx_queue_setup(struct rte_eth_dev *dev,
1481                          uint16_t queue_idx,
1482                          uint16_t nb_desc,
1483                          unsigned int socket_id,
1484                          const struct rte_eth_txconf *tx_conf)
1485 {
1486         const struct rte_memzone *tz;
1487         struct igb_tx_queue *txq;
1488         struct e1000_hw     *hw;
1489         uint32_t size;
1490         uint64_t offloads;
1491
1492         offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1493
1494         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1495
1496         /*
1497          * Validate number of transmit descriptors.
1498          * It must not exceed hardware maximum, and must be multiple
1499          * of E1000_ALIGN.
1500          */
1501         if (nb_desc % IGB_TXD_ALIGN != 0 ||
1502                         (nb_desc > E1000_MAX_RING_DESC) ||
1503                         (nb_desc < E1000_MIN_RING_DESC)) {
1504                 return -EINVAL;
1505         }
1506
1507         /*
1508          * The tx_free_thresh and tx_rs_thresh values are not used in the 1G
1509          * driver.
1510          */
1511         if (tx_conf->tx_free_thresh != 0)
1512                 PMD_INIT_LOG(INFO, "The tx_free_thresh parameter is not "
1513                              "used for the 1G driver.");
1514         if (tx_conf->tx_rs_thresh != 0)
1515                 PMD_INIT_LOG(INFO, "The tx_rs_thresh parameter is not "
1516                              "used for the 1G driver.");
1517         if (tx_conf->tx_thresh.wthresh == 0 && hw->mac.type != e1000_82576)
1518                 PMD_INIT_LOG(INFO, "To improve 1G driver performance, "
1519                              "consider setting the TX WTHRESH value to 4, 8, "
1520                              "or 16.");
1521
1522         /* Free memory prior to re-allocation if needed */
1523         if (dev->data->tx_queues[queue_idx] != NULL) {
1524                 igb_tx_queue_release(dev->data->tx_queues[queue_idx]);
1525                 dev->data->tx_queues[queue_idx] = NULL;
1526         }
1527
1528         /* First allocate the tx queue data structure */
1529         txq = rte_zmalloc("ethdev TX queue", sizeof(struct igb_tx_queue),
1530                                                         RTE_CACHE_LINE_SIZE);
1531         if (txq == NULL)
1532                 return -ENOMEM;
1533
1534         /*
1535          * Allocate TX ring hardware descriptors. A memzone large enough to
1536          * handle the maximum ring size is allocated in order to allow for
1537          * resizing in later calls to the queue setup function.
1538          */
1539         size = sizeof(union e1000_adv_tx_desc) * E1000_MAX_RING_DESC;
1540         tz = rte_eth_dma_zone_reserve(dev, "tx_ring", queue_idx, size,
1541                                       E1000_ALIGN, socket_id);
1542         if (tz == NULL) {
1543                 igb_tx_queue_release(txq);
1544                 return -ENOMEM;
1545         }
1546
1547         txq->nb_tx_desc = nb_desc;
1548         txq->pthresh = tx_conf->tx_thresh.pthresh;
1549         txq->hthresh = tx_conf->tx_thresh.hthresh;
1550         txq->wthresh = tx_conf->tx_thresh.wthresh;
1551         if (txq->wthresh > 0 && hw->mac.type == e1000_82576)
1552                 txq->wthresh = 1;
1553         txq->queue_id = queue_idx;
1554         txq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1555                 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1556         txq->port_id = dev->data->port_id;
1557
1558         txq->tdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_TDT(txq->reg_idx));
1559         txq->tx_ring_phys_addr = tz->iova;
1560
1561         txq->tx_ring = (union e1000_adv_tx_desc *) tz->addr;
1562         /* Allocate software ring */
1563         txq->sw_ring = rte_zmalloc("txq->sw_ring",
1564                                    sizeof(struct igb_tx_entry) * nb_desc,
1565                                    RTE_CACHE_LINE_SIZE);
1566         if (txq->sw_ring == NULL) {
1567                 igb_tx_queue_release(txq);
1568                 return -ENOMEM;
1569         }
1570         PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
1571                      txq->sw_ring, txq->tx_ring, txq->tx_ring_phys_addr);
1572
1573         igb_reset_tx_queue(txq, dev);
1574         dev->tx_pkt_burst = eth_igb_xmit_pkts;
1575         dev->tx_pkt_prepare = &eth_igb_prep_pkts;
1576         dev->data->tx_queues[queue_idx] = txq;
1577         txq->offloads = offloads;
1578
1579         return 0;
1580 }
1581
1582 static void
1583 igb_rx_queue_release_mbufs(struct igb_rx_queue *rxq)
1584 {
1585         unsigned i;
1586
1587         if (rxq->sw_ring != NULL) {
1588                 for (i = 0; i < rxq->nb_rx_desc; i++) {
1589                         if (rxq->sw_ring[i].mbuf != NULL) {
1590                                 rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
1591                                 rxq->sw_ring[i].mbuf = NULL;
1592                         }
1593                 }
1594         }
1595 }
1596
1597 static void
1598 igb_rx_queue_release(struct igb_rx_queue *rxq)
1599 {
1600         if (rxq != NULL) {
1601                 igb_rx_queue_release_mbufs(rxq);
1602                 rte_free(rxq->sw_ring);
1603                 rte_free(rxq);
1604         }
1605 }
1606
1607 void
1608 eth_igb_rx_queue_release(void *rxq)
1609 {
1610         igb_rx_queue_release(rxq);
1611 }
1612
1613 static void
1614 igb_reset_rx_queue(struct igb_rx_queue *rxq)
1615 {
1616         static const union e1000_adv_rx_desc zeroed_desc = {{0}};
1617         unsigned i;
1618
1619         /* Zero out HW ring memory */
1620         for (i = 0; i < rxq->nb_rx_desc; i++) {
1621                 rxq->rx_ring[i] = zeroed_desc;
1622         }
1623
1624         rxq->rx_tail = 0;
1625         rxq->pkt_first_seg = NULL;
1626         rxq->pkt_last_seg = NULL;
1627 }
1628
1629 uint64_t
1630 igb_get_rx_port_offloads_capa(struct rte_eth_dev *dev)
1631 {
1632         uint64_t rx_offload_capa;
1633
1634         RTE_SET_USED(dev);
1635         rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP  |
1636                           DEV_RX_OFFLOAD_VLAN_FILTER |
1637                           DEV_RX_OFFLOAD_IPV4_CKSUM  |
1638                           DEV_RX_OFFLOAD_UDP_CKSUM   |
1639                           DEV_RX_OFFLOAD_TCP_CKSUM   |
1640                           DEV_RX_OFFLOAD_JUMBO_FRAME |
1641                           DEV_RX_OFFLOAD_KEEP_CRC    |
1642                           DEV_RX_OFFLOAD_SCATTER;
1643
1644         return rx_offload_capa;
1645 }
1646
1647 uint64_t
1648 igb_get_rx_queue_offloads_capa(struct rte_eth_dev *dev)
1649 {
1650         struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1651         uint64_t rx_queue_offload_capa;
1652
1653         switch (hw->mac.type) {
1654         case e1000_vfadapt_i350:
1655                 /*
1656                  * As only one Rx queue can be used, let per queue offloading
1657                  * capability be same to per port queue offloading capability
1658                  * for better convenience.
1659                  */
1660                 rx_queue_offload_capa = igb_get_rx_port_offloads_capa(dev);
1661                 break;
1662         default:
1663                 rx_queue_offload_capa = 0;
1664         }
1665         return rx_queue_offload_capa;
1666 }
1667
1668 int
1669 eth_igb_rx_queue_setup(struct rte_eth_dev *dev,
1670                          uint16_t queue_idx,
1671                          uint16_t nb_desc,
1672                          unsigned int socket_id,
1673                          const struct rte_eth_rxconf *rx_conf,
1674                          struct rte_mempool *mp)
1675 {
1676         const struct rte_memzone *rz;
1677         struct igb_rx_queue *rxq;
1678         struct e1000_hw     *hw;
1679         unsigned int size;
1680         uint64_t offloads;
1681
1682         offloads = rx_conf->offloads | dev->data->dev_conf.rxmode.offloads;
1683
1684         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1685
1686         /*
1687          * Validate number of receive descriptors.
1688          * It must not exceed hardware maximum, and must be multiple
1689          * of E1000_ALIGN.
1690          */
1691         if (nb_desc % IGB_RXD_ALIGN != 0 ||
1692                         (nb_desc > E1000_MAX_RING_DESC) ||
1693                         (nb_desc < E1000_MIN_RING_DESC)) {
1694                 return -EINVAL;
1695         }
1696
1697         /* Free memory prior to re-allocation if needed */
1698         if (dev->data->rx_queues[queue_idx] != NULL) {
1699                 igb_rx_queue_release(dev->data->rx_queues[queue_idx]);
1700                 dev->data->rx_queues[queue_idx] = NULL;
1701         }
1702
1703         /* First allocate the RX queue data structure. */
1704         rxq = rte_zmalloc("ethdev RX queue", sizeof(struct igb_rx_queue),
1705                           RTE_CACHE_LINE_SIZE);
1706         if (rxq == NULL)
1707                 return -ENOMEM;
1708         rxq->offloads = offloads;
1709         rxq->mb_pool = mp;
1710         rxq->nb_rx_desc = nb_desc;
1711         rxq->pthresh = rx_conf->rx_thresh.pthresh;
1712         rxq->hthresh = rx_conf->rx_thresh.hthresh;
1713         rxq->wthresh = rx_conf->rx_thresh.wthresh;
1714         if (rxq->wthresh > 0 &&
1715             (hw->mac.type == e1000_82576 || hw->mac.type == e1000_vfadapt_i350))
1716                 rxq->wthresh = 1;
1717         rxq->drop_en = rx_conf->rx_drop_en;
1718         rxq->rx_free_thresh = rx_conf->rx_free_thresh;
1719         rxq->queue_id = queue_idx;
1720         rxq->reg_idx = (uint16_t)((RTE_ETH_DEV_SRIOV(dev).active == 0) ?
1721                 queue_idx : RTE_ETH_DEV_SRIOV(dev).def_pool_q_idx + queue_idx);
1722         rxq->port_id = dev->data->port_id;
1723         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC)
1724                 rxq->crc_len = ETHER_CRC_LEN;
1725         else
1726                 rxq->crc_len = 0;
1727
1728         /*
1729          *  Allocate RX ring hardware descriptors. A memzone large enough to
1730          *  handle the maximum ring size is allocated in order to allow for
1731          *  resizing in later calls to the queue setup function.
1732          */
1733         size = sizeof(union e1000_adv_rx_desc) * E1000_MAX_RING_DESC;
1734         rz = rte_eth_dma_zone_reserve(dev, "rx_ring", queue_idx, size,
1735                                       E1000_ALIGN, socket_id);
1736         if (rz == NULL) {
1737                 igb_rx_queue_release(rxq);
1738                 return -ENOMEM;
1739         }
1740         rxq->rdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDT(rxq->reg_idx));
1741         rxq->rdh_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDH(rxq->reg_idx));
1742         rxq->rx_ring_phys_addr = rz->iova;
1743         rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr;
1744
1745         /* Allocate software ring. */
1746         rxq->sw_ring = rte_zmalloc("rxq->sw_ring",
1747                                    sizeof(struct igb_rx_entry) * nb_desc,
1748                                    RTE_CACHE_LINE_SIZE);
1749         if (rxq->sw_ring == NULL) {
1750                 igb_rx_queue_release(rxq);
1751                 return -ENOMEM;
1752         }
1753         PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
1754                      rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr);
1755
1756         dev->data->rx_queues[queue_idx] = rxq;
1757         igb_reset_rx_queue(rxq);
1758
1759         return 0;
1760 }
1761
1762 uint32_t
1763 eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1764 {
1765 #define IGB_RXQ_SCAN_INTERVAL 4
1766         volatile union e1000_adv_rx_desc *rxdp;
1767         struct igb_rx_queue *rxq;
1768         uint32_t desc = 0;
1769
1770         rxq = dev->data->rx_queues[rx_queue_id];
1771         rxdp = &(rxq->rx_ring[rxq->rx_tail]);
1772
1773         while ((desc < rxq->nb_rx_desc) &&
1774                 (rxdp->wb.upper.status_error & E1000_RXD_STAT_DD)) {
1775                 desc += IGB_RXQ_SCAN_INTERVAL;
1776                 rxdp += IGB_RXQ_SCAN_INTERVAL;
1777                 if (rxq->rx_tail + desc >= rxq->nb_rx_desc)
1778                         rxdp = &(rxq->rx_ring[rxq->rx_tail +
1779                                 desc - rxq->nb_rx_desc]);
1780         }
1781
1782         return desc;
1783 }
1784
1785 int
1786 eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)
1787 {
1788         volatile union e1000_adv_rx_desc *rxdp;
1789         struct igb_rx_queue *rxq = rx_queue;
1790         uint32_t desc;
1791
1792         if (unlikely(offset >= rxq->nb_rx_desc))
1793                 return 0;
1794         desc = rxq->rx_tail + offset;
1795         if (desc >= rxq->nb_rx_desc)
1796                 desc -= rxq->nb_rx_desc;
1797
1798         rxdp = &rxq->rx_ring[desc];
1799         return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD);
1800 }
1801
1802 int
1803 eth_igb_rx_descriptor_status(void *rx_queue, uint16_t offset)
1804 {
1805         struct igb_rx_queue *rxq = rx_queue;
1806         volatile uint32_t *status;
1807         uint32_t desc;
1808
1809         if (unlikely(offset >= rxq->nb_rx_desc))
1810                 return -EINVAL;
1811
1812         if (offset >= rxq->nb_rx_desc - rxq->nb_rx_hold)
1813                 return RTE_ETH_RX_DESC_UNAVAIL;
1814
1815         desc = rxq->rx_tail + offset;
1816         if (desc >= rxq->nb_rx_desc)
1817                 desc -= rxq->nb_rx_desc;
1818
1819         status = &rxq->rx_ring[desc].wb.upper.status_error;
1820         if (*status & rte_cpu_to_le_32(E1000_RXD_STAT_DD))
1821                 return RTE_ETH_RX_DESC_DONE;
1822
1823         return RTE_ETH_RX_DESC_AVAIL;
1824 }
1825
1826 int
1827 eth_igb_tx_descriptor_status(void *tx_queue, uint16_t offset)
1828 {
1829         struct igb_tx_queue *txq = tx_queue;
1830         volatile uint32_t *status;
1831         uint32_t desc;
1832
1833         if (unlikely(offset >= txq->nb_tx_desc))
1834                 return -EINVAL;
1835
1836         desc = txq->tx_tail + offset;
1837         if (desc >= txq->nb_tx_desc)
1838                 desc -= txq->nb_tx_desc;
1839
1840         status = &txq->tx_ring[desc].wb.status;
1841         if (*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD))
1842                 return RTE_ETH_TX_DESC_DONE;
1843
1844         return RTE_ETH_TX_DESC_FULL;
1845 }
1846
1847 void
1848 igb_dev_clear_queues(struct rte_eth_dev *dev)
1849 {
1850         uint16_t i;
1851         struct igb_tx_queue *txq;
1852         struct igb_rx_queue *rxq;
1853
1854         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1855                 txq = dev->data->tx_queues[i];
1856                 if (txq != NULL) {
1857                         igb_tx_queue_release_mbufs(txq);
1858                         igb_reset_tx_queue(txq, dev);
1859                 }
1860         }
1861
1862         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1863                 rxq = dev->data->rx_queues[i];
1864                 if (rxq != NULL) {
1865                         igb_rx_queue_release_mbufs(rxq);
1866                         igb_reset_rx_queue(rxq);
1867                 }
1868         }
1869 }
1870
1871 void
1872 igb_dev_free_queues(struct rte_eth_dev *dev)
1873 {
1874         uint16_t i;
1875
1876         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1877                 eth_igb_rx_queue_release(dev->data->rx_queues[i]);
1878                 dev->data->rx_queues[i] = NULL;
1879         }
1880         dev->data->nb_rx_queues = 0;
1881
1882         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1883                 eth_igb_tx_queue_release(dev->data->tx_queues[i]);
1884                 dev->data->tx_queues[i] = NULL;
1885         }
1886         dev->data->nb_tx_queues = 0;
1887 }
1888
1889 /**
1890  * Receive Side Scaling (RSS).
1891  * See section 7.1.1.7 in the following document:
1892  *     "Intel 82576 GbE Controller Datasheet" - Revision 2.45 October 2009
1893  *
1894  * Principles:
1895  * The source and destination IP addresses of the IP header and the source and
1896  * destination ports of TCP/UDP headers, if any, of received packets are hashed
1897  * against a configurable random key to compute a 32-bit RSS hash result.
1898  * The seven (7) LSBs of the 32-bit hash result are used as an index into a
1899  * 128-entry redirection table (RETA).  Each entry of the RETA provides a 3-bit
1900  * RSS output index which is used as the RX queue index where to store the
1901  * received packets.
1902  * The following output is supplied in the RX write-back descriptor:
1903  *     - 32-bit result of the Microsoft RSS hash function,
1904  *     - 4-bit RSS type field.
1905  */
1906
1907 /*
1908  * RSS random key supplied in section 7.1.1.7.3 of the Intel 82576 datasheet.
1909  * Used as the default key.
1910  */
1911 static uint8_t rss_intel_key[40] = {
1912         0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
1913         0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
1914         0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
1915         0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
1916         0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
1917 };
1918
1919 static void
1920 igb_rss_disable(struct rte_eth_dev *dev)
1921 {
1922         struct e1000_hw *hw;
1923         uint32_t mrqc;
1924
1925         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1926         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1927         mrqc &= ~E1000_MRQC_ENABLE_MASK;
1928         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1929 }
1930
1931 static void
1932 igb_hw_rss_hash_set(struct e1000_hw *hw, struct rte_eth_rss_conf *rss_conf)
1933 {
1934         uint8_t  *hash_key;
1935         uint32_t rss_key;
1936         uint32_t mrqc;
1937         uint64_t rss_hf;
1938         uint16_t i;
1939
1940         hash_key = rss_conf->rss_key;
1941         if (hash_key != NULL) {
1942                 /* Fill in RSS hash key */
1943                 for (i = 0; i < 10; i++) {
1944                         rss_key  = hash_key[(i * 4)];
1945                         rss_key |= hash_key[(i * 4) + 1] << 8;
1946                         rss_key |= hash_key[(i * 4) + 2] << 16;
1947                         rss_key |= hash_key[(i * 4) + 3] << 24;
1948                         E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
1949                 }
1950         }
1951
1952         /* Set configured hashing protocols in MRQC register */
1953         rss_hf = rss_conf->rss_hf;
1954         mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */
1955         if (rss_hf & ETH_RSS_IPV4)
1956                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4;
1957         if (rss_hf & ETH_RSS_NONFRAG_IPV4_TCP)
1958                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_TCP;
1959         if (rss_hf & ETH_RSS_IPV6)
1960                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6;
1961         if (rss_hf & ETH_RSS_IPV6_EX)
1962                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_EX;
1963         if (rss_hf & ETH_RSS_NONFRAG_IPV6_TCP)
1964                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP;
1965         if (rss_hf & ETH_RSS_IPV6_TCP_EX)
1966                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
1967         if (rss_hf & ETH_RSS_NONFRAG_IPV4_UDP)
1968                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP;
1969         if (rss_hf & ETH_RSS_NONFRAG_IPV6_UDP)
1970                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP;
1971         if (rss_hf & ETH_RSS_IPV6_UDP_EX)
1972                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP_EX;
1973         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1974 }
1975
1976 int
1977 eth_igb_rss_hash_update(struct rte_eth_dev *dev,
1978                         struct rte_eth_rss_conf *rss_conf)
1979 {
1980         struct e1000_hw *hw;
1981         uint32_t mrqc;
1982         uint64_t rss_hf;
1983
1984         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1985
1986         /*
1987          * Before changing anything, first check that the update RSS operation
1988          * does not attempt to disable RSS, if RSS was enabled at
1989          * initialization time, or does not attempt to enable RSS, if RSS was
1990          * disabled at initialization time.
1991          */
1992         rss_hf = rss_conf->rss_hf & IGB_RSS_OFFLOAD_ALL;
1993         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1994         if (!(mrqc & E1000_MRQC_ENABLE_MASK)) { /* RSS disabled */
1995                 if (rss_hf != 0) /* Enable RSS */
1996                         return -(EINVAL);
1997                 return 0; /* Nothing to do */
1998         }
1999         /* RSS enabled */
2000         if (rss_hf == 0) /* Disable RSS */
2001                 return -(EINVAL);
2002         igb_hw_rss_hash_set(hw, rss_conf);
2003         return 0;
2004 }
2005
2006 int eth_igb_rss_hash_conf_get(struct rte_eth_dev *dev,
2007                               struct rte_eth_rss_conf *rss_conf)
2008 {
2009         struct e1000_hw *hw;
2010         uint8_t *hash_key;
2011         uint32_t rss_key;
2012         uint32_t mrqc;
2013         uint64_t rss_hf;
2014         uint16_t i;
2015
2016         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2017         hash_key = rss_conf->rss_key;
2018         if (hash_key != NULL) {
2019                 /* Return RSS hash key */
2020                 for (i = 0; i < 10; i++) {
2021                         rss_key = E1000_READ_REG_ARRAY(hw, E1000_RSSRK(0), i);
2022                         hash_key[(i * 4)] = rss_key & 0x000000FF;
2023                         hash_key[(i * 4) + 1] = (rss_key >> 8) & 0x000000FF;
2024                         hash_key[(i * 4) + 2] = (rss_key >> 16) & 0x000000FF;
2025                         hash_key[(i * 4) + 3] = (rss_key >> 24) & 0x000000FF;
2026                 }
2027         }
2028
2029         /* Get RSS functions configured in MRQC register */
2030         mrqc = E1000_READ_REG(hw, E1000_MRQC);
2031         if ((mrqc & E1000_MRQC_ENABLE_RSS_4Q) == 0) { /* RSS is disabled */
2032                 rss_conf->rss_hf = 0;
2033                 return 0;
2034         }
2035         rss_hf = 0;
2036         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4)
2037                 rss_hf |= ETH_RSS_IPV4;
2038         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_TCP)
2039                 rss_hf |= ETH_RSS_NONFRAG_IPV4_TCP;
2040         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6)
2041                 rss_hf |= ETH_RSS_IPV6;
2042         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_EX)
2043                 rss_hf |= ETH_RSS_IPV6_EX;
2044         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP)
2045                 rss_hf |= ETH_RSS_NONFRAG_IPV6_TCP;
2046         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP_EX)
2047                 rss_hf |= ETH_RSS_IPV6_TCP_EX;
2048         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_UDP)
2049                 rss_hf |= ETH_RSS_NONFRAG_IPV4_UDP;
2050         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP)
2051                 rss_hf |= ETH_RSS_NONFRAG_IPV6_UDP;
2052         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP_EX)
2053                 rss_hf |= ETH_RSS_IPV6_UDP_EX;
2054         rss_conf->rss_hf = rss_hf;
2055         return 0;
2056 }
2057
2058 static void
2059 igb_rss_configure(struct rte_eth_dev *dev)
2060 {
2061         struct rte_eth_rss_conf rss_conf;
2062         struct e1000_hw *hw;
2063         uint32_t shift;
2064         uint16_t i;
2065
2066         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2067
2068         /* Fill in redirection table. */
2069         shift = (hw->mac.type == e1000_82575) ? 6 : 0;
2070         for (i = 0; i < 128; i++) {
2071                 union e1000_reta {
2072                         uint32_t dword;
2073                         uint8_t  bytes[4];
2074                 } reta;
2075                 uint8_t q_idx;
2076
2077                 q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
2078                                    i % dev->data->nb_rx_queues : 0);
2079                 reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
2080                 if ((i & 3) == 3)
2081                         E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
2082         }
2083
2084         /*
2085          * Configure the RSS key and the RSS protocols used to compute
2086          * the RSS hash of input packets.
2087          */
2088         rss_conf = dev->data->dev_conf.rx_adv_conf.rss_conf;
2089         if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) {
2090                 igb_rss_disable(dev);
2091                 return;
2092         }
2093         if (rss_conf.rss_key == NULL)
2094                 rss_conf.rss_key = rss_intel_key; /* Default hash key */
2095         igb_hw_rss_hash_set(hw, &rss_conf);
2096 }
2097
2098 /*
2099  * Check if the mac type support VMDq or not.
2100  * Return 1 if it supports, otherwise, return 0.
2101  */
2102 static int
2103 igb_is_vmdq_supported(const struct rte_eth_dev *dev)
2104 {
2105         const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2106
2107         switch (hw->mac.type) {
2108         case e1000_82576:
2109         case e1000_82580:
2110         case e1000_i350:
2111                 return 1;
2112         case e1000_82540:
2113         case e1000_82541:
2114         case e1000_82542:
2115         case e1000_82543:
2116         case e1000_82544:
2117         case e1000_82545:
2118         case e1000_82546:
2119         case e1000_82547:
2120         case e1000_82571:
2121         case e1000_82572:
2122         case e1000_82573:
2123         case e1000_82574:
2124         case e1000_82583:
2125         case e1000_i210:
2126         case e1000_i211:
2127         default:
2128                 PMD_INIT_LOG(ERR, "Cannot support VMDq feature");
2129                 return 0;
2130         }
2131 }
2132
2133 static int
2134 igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
2135 {
2136         struct rte_eth_vmdq_rx_conf *cfg;
2137         struct e1000_hw *hw;
2138         uint32_t mrqc, vt_ctl, vmolr, rctl;
2139         int i;
2140
2141         PMD_INIT_FUNC_TRACE();
2142
2143         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2144         cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf;
2145
2146         /* Check if mac type can support VMDq, return value of 0 means NOT support */
2147         if (igb_is_vmdq_supported(dev) == 0)
2148                 return -1;
2149
2150         igb_rss_disable(dev);
2151
2152         /* RCTL: eanble VLAN filter */
2153         rctl = E1000_READ_REG(hw, E1000_RCTL);
2154         rctl |= E1000_RCTL_VFE;
2155         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
2156
2157         /* MRQC: enable vmdq */
2158         mrqc = E1000_READ_REG(hw, E1000_MRQC);
2159         mrqc |= E1000_MRQC_ENABLE_VMDQ;
2160         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
2161
2162         /* VTCTL:  pool selection according to VLAN tag */
2163         vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
2164         if (cfg->enable_default_pool)
2165                 vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT);
2166         vt_ctl |= E1000_VT_CTL_IGNORE_MAC;
2167         E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
2168
2169         for (i = 0; i < E1000_VMOLR_SIZE; i++) {
2170                 vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
2171                 vmolr &= ~(E1000_VMOLR_AUPE | E1000_VMOLR_ROMPE |
2172                         E1000_VMOLR_ROPE | E1000_VMOLR_BAM |
2173                         E1000_VMOLR_MPME);
2174
2175                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_UNTAG)
2176                         vmolr |= E1000_VMOLR_AUPE;
2177                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_MC)
2178                         vmolr |= E1000_VMOLR_ROMPE;
2179                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_UC)
2180                         vmolr |= E1000_VMOLR_ROPE;
2181                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_BROADCAST)
2182                         vmolr |= E1000_VMOLR_BAM;
2183                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_MULTICAST)
2184                         vmolr |= E1000_VMOLR_MPME;
2185
2186                 E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
2187         }
2188
2189         /*
2190          * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1
2191          * Both 82576 and 82580 support it
2192          */
2193         if (hw->mac.type != e1000_i350) {
2194                 for (i = 0; i < E1000_VMOLR_SIZE; i++) {
2195                         vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
2196                         vmolr |= E1000_VMOLR_STRVLAN;
2197                         E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
2198                 }
2199         }
2200
2201         /* VFTA - enable all vlan filters */
2202         for (i = 0; i < IGB_VFTA_SIZE; i++)
2203                 E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX);
2204
2205         /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */
2206         if (hw->mac.type != e1000_82580)
2207                 E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK);
2208
2209         /*
2210          * RAH/RAL - allow pools to read specific mac addresses
2211          * In this case, all pools should be able to read from mac addr 0
2212          */
2213         E1000_WRITE_REG(hw, E1000_RAH(0), (E1000_RAH_AV | UINT16_MAX));
2214         E1000_WRITE_REG(hw, E1000_RAL(0), UINT32_MAX);
2215
2216         /* VLVF: set up filters for vlan tags as configured */
2217         for (i = 0; i < cfg->nb_pool_maps; i++) {
2218                 /* set vlan id in VF register and set the valid bit */
2219                 E1000_WRITE_REG(hw, E1000_VLVF(i), (E1000_VLVF_VLANID_ENABLE | \
2220                         (cfg->pool_map[i].vlan_id & ETH_VLAN_ID_MAX) | \
2221                         ((cfg->pool_map[i].pools << E1000_VLVF_POOLSEL_SHIFT ) & \
2222                         E1000_VLVF_POOLSEL_MASK)));
2223         }
2224
2225         E1000_WRITE_FLUSH(hw);
2226
2227         return 0;
2228 }
2229
2230
2231 /*********************************************************************
2232  *
2233  *  Enable receive unit.
2234  *
2235  **********************************************************************/
2236
2237 static int
2238 igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq)
2239 {
2240         struct igb_rx_entry *rxe = rxq->sw_ring;
2241         uint64_t dma_addr;
2242         unsigned i;
2243
2244         /* Initialize software ring entries. */
2245         for (i = 0; i < rxq->nb_rx_desc; i++) {
2246                 volatile union e1000_adv_rx_desc *rxd;
2247                 struct rte_mbuf *mbuf = rte_mbuf_raw_alloc(rxq->mb_pool);
2248
2249                 if (mbuf == NULL) {
2250                         PMD_INIT_LOG(ERR, "RX mbuf alloc failed "
2251                                      "queue_id=%hu", rxq->queue_id);
2252                         return -ENOMEM;
2253                 }
2254                 dma_addr =
2255                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
2256                 rxd = &rxq->rx_ring[i];
2257                 rxd->read.hdr_addr = 0;
2258                 rxd->read.pkt_addr = dma_addr;
2259                 rxe[i].mbuf = mbuf;
2260         }
2261
2262         return 0;
2263 }
2264
2265 #define E1000_MRQC_DEF_Q_SHIFT               (3)
2266 static int
2267 igb_dev_mq_rx_configure(struct rte_eth_dev *dev)
2268 {
2269         struct e1000_hw *hw =
2270                 E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2271         uint32_t mrqc;
2272
2273         if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) {
2274                 /*
2275                  * SRIOV active scheme
2276                  * FIXME if support RSS together with VMDq & SRIOV
2277                  */
2278                 mrqc = E1000_MRQC_ENABLE_VMDQ;
2279                 /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */
2280                 mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT;
2281                 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
2282         } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) {
2283                 /*
2284                  * SRIOV inactive scheme
2285                  */
2286                 switch (dev->data->dev_conf.rxmode.mq_mode) {
2287                         case ETH_MQ_RX_RSS:
2288                                 igb_rss_configure(dev);
2289                                 break;
2290                         case ETH_MQ_RX_VMDQ_ONLY:
2291                                 /*Configure general VMDQ only RX parameters*/
2292                                 igb_vmdq_rx_hw_configure(dev);
2293                                 break;
2294                         case ETH_MQ_RX_NONE:
2295                                 /* if mq_mode is none, disable rss mode.*/
2296                         default:
2297                                 igb_rss_disable(dev);
2298                                 break;
2299                 }
2300         }
2301
2302         return 0;
2303 }
2304
2305 int
2306 eth_igb_rx_init(struct rte_eth_dev *dev)
2307 {
2308         struct rte_eth_rxmode *rxmode;
2309         struct e1000_hw     *hw;
2310         struct igb_rx_queue *rxq;
2311         uint32_t rctl;
2312         uint32_t rxcsum;
2313         uint32_t srrctl;
2314         uint16_t buf_size;
2315         uint16_t rctl_bsize;
2316         uint16_t i;
2317         int ret;
2318
2319         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2320         srrctl = 0;
2321
2322         /*
2323          * Make sure receives are disabled while setting
2324          * up the descriptor ring.
2325          */
2326         rctl = E1000_READ_REG(hw, E1000_RCTL);
2327         E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
2328
2329         rxmode = &dev->data->dev_conf.rxmode;
2330
2331         /*
2332          * Configure support of jumbo frames, if any.
2333          */
2334         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
2335                 rctl |= E1000_RCTL_LPE;
2336
2337                 /*
2338                  * Set maximum packet length by default, and might be updated
2339                  * together with enabling/disabling dual VLAN.
2340                  */
2341                 E1000_WRITE_REG(hw, E1000_RLPML,
2342                         dev->data->dev_conf.rxmode.max_rx_pkt_len +
2343                                                 VLAN_TAG_SIZE);
2344         } else
2345                 rctl &= ~E1000_RCTL_LPE;
2346
2347         /* Configure and enable each RX queue. */
2348         rctl_bsize = 0;
2349         dev->rx_pkt_burst = eth_igb_recv_pkts;
2350         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2351                 uint64_t bus_addr;
2352                 uint32_t rxdctl;
2353
2354                 rxq = dev->data->rx_queues[i];
2355
2356                 rxq->flags = 0;
2357                 /*
2358                  * i350 and i354 vlan packets have vlan tags byte swapped.
2359                  */
2360                 if (hw->mac.type == e1000_i350 || hw->mac.type == e1000_i354) {
2361                         rxq->flags |= IGB_RXQ_FLAG_LB_BSWAP_VLAN;
2362                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap required");
2363                 } else {
2364                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap not required");
2365                 }
2366
2367                 /* Allocate buffers for descriptor rings and set up queue */
2368                 ret = igb_alloc_rx_queue_mbufs(rxq);
2369                 if (ret)
2370                         return ret;
2371
2372                 /*
2373                  * Reset crc_len in case it was changed after queue setup by a
2374                  *  call to configure
2375                  */
2376                 if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC)
2377                         rxq->crc_len = ETHER_CRC_LEN;
2378                 else
2379                         rxq->crc_len = 0;
2380
2381                 bus_addr = rxq->rx_ring_phys_addr;
2382                 E1000_WRITE_REG(hw, E1000_RDLEN(rxq->reg_idx),
2383                                 rxq->nb_rx_desc *
2384                                 sizeof(union e1000_adv_rx_desc));
2385                 E1000_WRITE_REG(hw, E1000_RDBAH(rxq->reg_idx),
2386                                 (uint32_t)(bus_addr >> 32));
2387                 E1000_WRITE_REG(hw, E1000_RDBAL(rxq->reg_idx), (uint32_t)bus_addr);
2388
2389                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2390
2391                 /*
2392                  * Configure RX buffer size.
2393                  */
2394                 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
2395                         RTE_PKTMBUF_HEADROOM);
2396                 if (buf_size >= 1024) {
2397                         /*
2398                          * Configure the BSIZEPACKET field of the SRRCTL
2399                          * register of the queue.
2400                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
2401                          * If this field is equal to 0b, then RCTL.BSIZE
2402                          * determines the RX packet buffer size.
2403                          */
2404                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2405                                    E1000_SRRCTL_BSIZEPKT_MASK);
2406                         buf_size = (uint16_t) ((srrctl &
2407                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
2408                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
2409
2410                         /* It adds dual VLAN length for supporting dual VLAN */
2411                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2412                                                 2 * VLAN_TAG_SIZE) > buf_size){
2413                                 if (!dev->data->scattered_rx)
2414                                         PMD_INIT_LOG(DEBUG,
2415                                                      "forcing scatter mode");
2416                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2417                                 dev->data->scattered_rx = 1;
2418                         }
2419                 } else {
2420                         /*
2421                          * Use BSIZE field of the device RCTL register.
2422                          */
2423                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2424                                 rctl_bsize = buf_size;
2425                         if (!dev->data->scattered_rx)
2426                                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2427                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2428                         dev->data->scattered_rx = 1;
2429                 }
2430
2431                 /* Set if packets are dropped when no descriptors available */
2432                 if (rxq->drop_en)
2433                         srrctl |= E1000_SRRCTL_DROP_EN;
2434
2435                 E1000_WRITE_REG(hw, E1000_SRRCTL(rxq->reg_idx), srrctl);
2436
2437                 /* Enable this RX queue. */
2438                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(rxq->reg_idx));
2439                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2440                 rxdctl &= 0xFFF00000;
2441                 rxdctl |= (rxq->pthresh & 0x1F);
2442                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2443                 rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2444                 E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl);
2445         }
2446
2447         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_SCATTER) {
2448                 if (!dev->data->scattered_rx)
2449                         PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2450                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2451                 dev->data->scattered_rx = 1;
2452         }
2453
2454         /*
2455          * Setup BSIZE field of RCTL register, if needed.
2456          * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL
2457          * register, since the code above configures the SRRCTL register of
2458          * the RX queue in such a case.
2459          * All configurable sizes are:
2460          * 16384: rctl |= (E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX);
2461          *  8192: rctl |= (E1000_RCTL_SZ_8192  | E1000_RCTL_BSEX);
2462          *  4096: rctl |= (E1000_RCTL_SZ_4096  | E1000_RCTL_BSEX);
2463          *  2048: rctl |= E1000_RCTL_SZ_2048;
2464          *  1024: rctl |= E1000_RCTL_SZ_1024;
2465          *   512: rctl |= E1000_RCTL_SZ_512;
2466          *   256: rctl |= E1000_RCTL_SZ_256;
2467          */
2468         if (rctl_bsize > 0) {
2469                 if (rctl_bsize >= 512) /* 512 <= buf_size < 1024 - use 512 */
2470                         rctl |= E1000_RCTL_SZ_512;
2471                 else /* 256 <= buf_size < 512 - use 256 */
2472                         rctl |= E1000_RCTL_SZ_256;
2473         }
2474
2475         /*
2476          * Configure RSS if device configured with multiple RX queues.
2477          */
2478         igb_dev_mq_rx_configure(dev);
2479
2480         /* Update the rctl since igb_dev_mq_rx_configure may change its value */
2481         rctl |= E1000_READ_REG(hw, E1000_RCTL);
2482
2483         /*
2484          * Setup the Checksum Register.
2485          * Receive Full-Packet Checksum Offload is mutually exclusive with RSS.
2486          */
2487         rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
2488         rxcsum |= E1000_RXCSUM_PCSD;
2489
2490         /* Enable both L3/L4 rx checksum offload */
2491         if (rxmode->offloads & DEV_RX_OFFLOAD_IPV4_CKSUM)
2492                 rxcsum |= E1000_RXCSUM_IPOFL;
2493         else
2494                 rxcsum &= ~E1000_RXCSUM_IPOFL;
2495         if (rxmode->offloads &
2496                 (DEV_RX_OFFLOAD_TCP_CKSUM | DEV_RX_OFFLOAD_UDP_CKSUM))
2497                 rxcsum |= E1000_RXCSUM_TUOFL;
2498         else
2499                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2500         if (rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
2501                 rxcsum |= E1000_RXCSUM_CRCOFL;
2502         else
2503                 rxcsum &= ~E1000_RXCSUM_CRCOFL;
2504
2505         E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
2506
2507         /* Setup the Receive Control Register. */
2508         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC) {
2509                 rctl &= ~E1000_RCTL_SECRC; /* Do not Strip Ethernet CRC. */
2510
2511                 /* clear STRCRC bit in all queues */
2512                 if (hw->mac.type == e1000_i350 ||
2513                     hw->mac.type == e1000_i210 ||
2514                     hw->mac.type == e1000_i211 ||
2515                     hw->mac.type == e1000_i354) {
2516                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2517                                 rxq = dev->data->rx_queues[i];
2518                                 uint32_t dvmolr = E1000_READ_REG(hw,
2519                                         E1000_DVMOLR(rxq->reg_idx));
2520                                 dvmolr &= ~E1000_DVMOLR_STRCRC;
2521                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
2522                         }
2523                 }
2524         } else {
2525                 rctl |= E1000_RCTL_SECRC; /* Strip Ethernet CRC. */
2526
2527                 /* set STRCRC bit in all queues */
2528                 if (hw->mac.type == e1000_i350 ||
2529                     hw->mac.type == e1000_i210 ||
2530                     hw->mac.type == e1000_i211 ||
2531                     hw->mac.type == e1000_i354) {
2532                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2533                                 rxq = dev->data->rx_queues[i];
2534                                 uint32_t dvmolr = E1000_READ_REG(hw,
2535                                         E1000_DVMOLR(rxq->reg_idx));
2536                                 dvmolr |= E1000_DVMOLR_STRCRC;
2537                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
2538                         }
2539                 }
2540         }
2541
2542         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2543         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
2544                 E1000_RCTL_RDMTS_HALF |
2545                 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2546
2547         /* Make sure VLAN Filters are off. */
2548         if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_VMDQ_ONLY)
2549                 rctl &= ~E1000_RCTL_VFE;
2550         /* Don't store bad packets. */
2551         rctl &= ~E1000_RCTL_SBP;
2552
2553         /* Enable Receives. */
2554         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
2555
2556         /*
2557          * Setup the HW Rx Head and Tail Descriptor Pointers.
2558          * This needs to be done after enable.
2559          */
2560         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2561                 rxq = dev->data->rx_queues[i];
2562                 E1000_WRITE_REG(hw, E1000_RDH(rxq->reg_idx), 0);
2563                 E1000_WRITE_REG(hw, E1000_RDT(rxq->reg_idx), rxq->nb_rx_desc - 1);
2564         }
2565
2566         return 0;
2567 }
2568
2569 /*********************************************************************
2570  *
2571  *  Enable transmit unit.
2572  *
2573  **********************************************************************/
2574 void
2575 eth_igb_tx_init(struct rte_eth_dev *dev)
2576 {
2577         struct e1000_hw     *hw;
2578         struct igb_tx_queue *txq;
2579         uint32_t tctl;
2580         uint32_t txdctl;
2581         uint16_t i;
2582
2583         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2584
2585         /* Setup the Base and Length of the Tx Descriptor Rings. */
2586         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2587                 uint64_t bus_addr;
2588                 txq = dev->data->tx_queues[i];
2589                 bus_addr = txq->tx_ring_phys_addr;
2590
2591                 E1000_WRITE_REG(hw, E1000_TDLEN(txq->reg_idx),
2592                                 txq->nb_tx_desc *
2593                                 sizeof(union e1000_adv_tx_desc));
2594                 E1000_WRITE_REG(hw, E1000_TDBAH(txq->reg_idx),
2595                                 (uint32_t)(bus_addr >> 32));
2596                 E1000_WRITE_REG(hw, E1000_TDBAL(txq->reg_idx), (uint32_t)bus_addr);
2597
2598                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2599                 E1000_WRITE_REG(hw, E1000_TDT(txq->reg_idx), 0);
2600                 E1000_WRITE_REG(hw, E1000_TDH(txq->reg_idx), 0);
2601
2602                 /* Setup Transmit threshold registers. */
2603                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(txq->reg_idx));
2604                 txdctl |= txq->pthresh & 0x1F;
2605                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2606                 txdctl |= ((txq->wthresh & 0x1F) << 16);
2607                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2608                 E1000_WRITE_REG(hw, E1000_TXDCTL(txq->reg_idx), txdctl);
2609         }
2610
2611         /* Program the Transmit Control Register. */
2612         tctl = E1000_READ_REG(hw, E1000_TCTL);
2613         tctl &= ~E1000_TCTL_CT;
2614         tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN |
2615                  (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT));
2616
2617         e1000_config_collision_dist(hw);
2618
2619         /* This write will effectively turn on the transmit unit. */
2620         E1000_WRITE_REG(hw, E1000_TCTL, tctl);
2621 }
2622
2623 /*********************************************************************
2624  *
2625  *  Enable VF receive unit.
2626  *
2627  **********************************************************************/
2628 int
2629 eth_igbvf_rx_init(struct rte_eth_dev *dev)
2630 {
2631         struct e1000_hw     *hw;
2632         struct igb_rx_queue *rxq;
2633         uint32_t srrctl;
2634         uint16_t buf_size;
2635         uint16_t rctl_bsize;
2636         uint16_t i;
2637         int ret;
2638
2639         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2640
2641         /* setup MTU */
2642         e1000_rlpml_set_vf(hw,
2643                 (uint16_t)(dev->data->dev_conf.rxmode.max_rx_pkt_len +
2644                 VLAN_TAG_SIZE));
2645
2646         /* Configure and enable each RX queue. */
2647         rctl_bsize = 0;
2648         dev->rx_pkt_burst = eth_igb_recv_pkts;
2649         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2650                 uint64_t bus_addr;
2651                 uint32_t rxdctl;
2652
2653                 rxq = dev->data->rx_queues[i];
2654
2655                 rxq->flags = 0;
2656                 /*
2657                  * i350VF LB vlan packets have vlan tags byte swapped.
2658                  */
2659                 if (hw->mac.type == e1000_vfadapt_i350) {
2660                         rxq->flags |= IGB_RXQ_FLAG_LB_BSWAP_VLAN;
2661                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap required");
2662                 } else {
2663                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap not required");
2664                 }
2665
2666                 /* Allocate buffers for descriptor rings and set up queue */
2667                 ret = igb_alloc_rx_queue_mbufs(rxq);
2668                 if (ret)
2669                         return ret;
2670
2671                 bus_addr = rxq->rx_ring_phys_addr;
2672                 E1000_WRITE_REG(hw, E1000_RDLEN(i),
2673                                 rxq->nb_rx_desc *
2674                                 sizeof(union e1000_adv_rx_desc));
2675                 E1000_WRITE_REG(hw, E1000_RDBAH(i),
2676                                 (uint32_t)(bus_addr >> 32));
2677                 E1000_WRITE_REG(hw, E1000_RDBAL(i), (uint32_t)bus_addr);
2678
2679                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2680
2681                 /*
2682                  * Configure RX buffer size.
2683                  */
2684                 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
2685                         RTE_PKTMBUF_HEADROOM);
2686                 if (buf_size >= 1024) {
2687                         /*
2688                          * Configure the BSIZEPACKET field of the SRRCTL
2689                          * register of the queue.
2690                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
2691                          * If this field is equal to 0b, then RCTL.BSIZE
2692                          * determines the RX packet buffer size.
2693                          */
2694                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2695                                    E1000_SRRCTL_BSIZEPKT_MASK);
2696                         buf_size = (uint16_t) ((srrctl &
2697                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
2698                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
2699
2700                         /* It adds dual VLAN length for supporting dual VLAN */
2701                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2702                                                 2 * VLAN_TAG_SIZE) > buf_size){
2703                                 if (!dev->data->scattered_rx)
2704                                         PMD_INIT_LOG(DEBUG,
2705                                                      "forcing scatter mode");
2706                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2707                                 dev->data->scattered_rx = 1;
2708                         }
2709                 } else {
2710                         /*
2711                          * Use BSIZE field of the device RCTL register.
2712                          */
2713                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2714                                 rctl_bsize = buf_size;
2715                         if (!dev->data->scattered_rx)
2716                                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2717                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2718                         dev->data->scattered_rx = 1;
2719                 }
2720
2721                 /* Set if packets are dropped when no descriptors available */
2722                 if (rxq->drop_en)
2723                         srrctl |= E1000_SRRCTL_DROP_EN;
2724
2725                 E1000_WRITE_REG(hw, E1000_SRRCTL(i), srrctl);
2726
2727                 /* Enable this RX queue. */
2728                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i));
2729                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2730                 rxdctl &= 0xFFF00000;
2731                 rxdctl |= (rxq->pthresh & 0x1F);
2732                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2733                 if (hw->mac.type == e1000_vfadapt) {
2734                         /*
2735                          * Workaround of 82576 VF Erratum
2736                          * force set WTHRESH to 1
2737                          * to avoid Write-Back not triggered sometimes
2738                          */
2739                         rxdctl |= 0x10000;
2740                         PMD_INIT_LOG(DEBUG, "Force set RX WTHRESH to 1 !");
2741                 }
2742                 else
2743                         rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2744                 E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
2745         }
2746
2747         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_SCATTER) {
2748                 if (!dev->data->scattered_rx)
2749                         PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2750                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2751                 dev->data->scattered_rx = 1;
2752         }
2753
2754         /*
2755          * Setup the HW Rx Head and Tail Descriptor Pointers.
2756          * This needs to be done after enable.
2757          */
2758         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2759                 rxq = dev->data->rx_queues[i];
2760                 E1000_WRITE_REG(hw, E1000_RDH(i), 0);
2761                 E1000_WRITE_REG(hw, E1000_RDT(i), rxq->nb_rx_desc - 1);
2762         }
2763
2764         return 0;
2765 }
2766
2767 /*********************************************************************
2768  *
2769  *  Enable VF transmit unit.
2770  *
2771  **********************************************************************/
2772 void
2773 eth_igbvf_tx_init(struct rte_eth_dev *dev)
2774 {
2775         struct e1000_hw     *hw;
2776         struct igb_tx_queue *txq;
2777         uint32_t txdctl;
2778         uint16_t i;
2779
2780         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2781
2782         /* Setup the Base and Length of the Tx Descriptor Rings. */
2783         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2784                 uint64_t bus_addr;
2785
2786                 txq = dev->data->tx_queues[i];
2787                 bus_addr = txq->tx_ring_phys_addr;
2788                 E1000_WRITE_REG(hw, E1000_TDLEN(i),
2789                                 txq->nb_tx_desc *
2790                                 sizeof(union e1000_adv_tx_desc));
2791                 E1000_WRITE_REG(hw, E1000_TDBAH(i),
2792                                 (uint32_t)(bus_addr >> 32));
2793                 E1000_WRITE_REG(hw, E1000_TDBAL(i), (uint32_t)bus_addr);
2794
2795                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2796                 E1000_WRITE_REG(hw, E1000_TDT(i), 0);
2797                 E1000_WRITE_REG(hw, E1000_TDH(i), 0);
2798
2799                 /* Setup Transmit threshold registers. */
2800                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(i));
2801                 txdctl |= txq->pthresh & 0x1F;
2802                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2803                 if (hw->mac.type == e1000_82576) {
2804                         /*
2805                          * Workaround of 82576 VF Erratum
2806                          * force set WTHRESH to 1
2807                          * to avoid Write-Back not triggered sometimes
2808                          */
2809                         txdctl |= 0x10000;
2810                         PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !");
2811                 }
2812                 else
2813                         txdctl |= ((txq->wthresh & 0x1F) << 16);
2814                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2815                 E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl);
2816         }
2817
2818 }
2819
2820 void
2821 igb_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
2822         struct rte_eth_rxq_info *qinfo)
2823 {
2824         struct igb_rx_queue *rxq;
2825
2826         rxq = dev->data->rx_queues[queue_id];
2827
2828         qinfo->mp = rxq->mb_pool;
2829         qinfo->scattered_rx = dev->data->scattered_rx;
2830         qinfo->nb_desc = rxq->nb_rx_desc;
2831
2832         qinfo->conf.rx_free_thresh = rxq->rx_free_thresh;
2833         qinfo->conf.rx_drop_en = rxq->drop_en;
2834         qinfo->conf.offloads = rxq->offloads;
2835 }
2836
2837 void
2838 igb_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
2839         struct rte_eth_txq_info *qinfo)
2840 {
2841         struct igb_tx_queue *txq;
2842
2843         txq = dev->data->tx_queues[queue_id];
2844
2845         qinfo->nb_desc = txq->nb_tx_desc;
2846
2847         qinfo->conf.tx_thresh.pthresh = txq->pthresh;
2848         qinfo->conf.tx_thresh.hthresh = txq->hthresh;
2849         qinfo->conf.tx_thresh.wthresh = txq->wthresh;
2850         qinfo->conf.offloads = txq->offloads;
2851 }
2852
2853 int
2854 igb_rss_conf_init(struct igb_rte_flow_rss_conf *out,
2855                   const struct rte_flow_action_rss *in)
2856 {
2857         if (in->key_len > RTE_DIM(out->key) ||
2858             in->queue_num > RTE_DIM(out->queue))
2859                 return -EINVAL;
2860         out->conf = (struct rte_flow_action_rss){
2861                 .func = in->func,
2862                 .level = in->level,
2863                 .types = in->types,
2864                 .key_len = in->key_len,
2865                 .queue_num = in->queue_num,
2866                 .key = memcpy(out->key, in->key, in->key_len),
2867                 .queue = memcpy(out->queue, in->queue,
2868                                 sizeof(*in->queue) * in->queue_num),
2869         };
2870         return 0;
2871 }
2872
2873 int
2874 igb_action_rss_same(const struct rte_flow_action_rss *comp,
2875                     const struct rte_flow_action_rss *with)
2876 {
2877         return (comp->func == with->func &&
2878                 comp->level == with->level &&
2879                 comp->types == with->types &&
2880                 comp->key_len == with->key_len &&
2881                 comp->queue_num == with->queue_num &&
2882                 !memcmp(comp->key, with->key, with->key_len) &&
2883                 !memcmp(comp->queue, with->queue,
2884                         sizeof(*with->queue) * with->queue_num));
2885 }
2886
2887 int
2888 igb_config_rss_filter(struct rte_eth_dev *dev,
2889                 struct igb_rte_flow_rss_conf *conf, bool add)
2890 {
2891         uint32_t shift;
2892         uint16_t i, j;
2893         struct rte_eth_rss_conf rss_conf = {
2894                 .rss_key = conf->conf.key_len ?
2895                         (void *)(uintptr_t)conf->conf.key : NULL,
2896                 .rss_key_len = conf->conf.key_len,
2897                 .rss_hf = conf->conf.types,
2898         };
2899         struct e1000_filter_info *filter_info =
2900                 E1000_DEV_PRIVATE_TO_FILTER_INFO(dev->data->dev_private);
2901         struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2902
2903         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2904
2905         if (!add) {
2906                 if (igb_action_rss_same(&filter_info->rss_info.conf,
2907                                         &conf->conf)) {
2908                         igb_rss_disable(dev);
2909                         memset(&filter_info->rss_info, 0,
2910                                 sizeof(struct igb_rte_flow_rss_conf));
2911                         return 0;
2912                 }
2913                 return -EINVAL;
2914         }
2915
2916         if (filter_info->rss_info.conf.queue_num)
2917                 return -EINVAL;
2918
2919         /* Fill in redirection table. */
2920         shift = (hw->mac.type == e1000_82575) ? 6 : 0;
2921         for (i = 0, j = 0; i < 128; i++, j++) {
2922                 union e1000_reta {
2923                         uint32_t dword;
2924                         uint8_t  bytes[4];
2925                 } reta;
2926                 uint8_t q_idx;
2927
2928                 if (j == conf->conf.queue_num)
2929                         j = 0;
2930                 q_idx = conf->conf.queue[j];
2931                 reta.bytes[i & 3] = (uint8_t)(q_idx << shift);
2932                 if ((i & 3) == 3)
2933                         E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
2934         }
2935
2936         /* Configure the RSS key and the RSS protocols used to compute
2937          * the RSS hash of input packets.
2938          */
2939         if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) {
2940                 igb_rss_disable(dev);
2941                 return 0;
2942         }
2943         if (rss_conf.rss_key == NULL)
2944                 rss_conf.rss_key = rss_intel_key; /* Default hash key */
2945         igb_hw_rss_hash_set(hw, &rss_conf);
2946
2947         if (igb_rss_conf_init(&filter_info->rss_info, &conf->conf))
2948                 return -EINVAL;
2949
2950         return 0;
2951 }