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 rx_offload_capa;
1456
1457         RTE_SET_USED(dev);
1458         rx_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 rx_offload_capa;
1467 }
1468
1469 uint64_t
1470 igb_get_tx_queue_offloads_capa(struct rte_eth_dev *dev)
1471 {
1472         uint64_t rx_queue_offload_capa;
1473
1474         rx_queue_offload_capa = igb_get_tx_port_offloads_capa(dev);
1475
1476         return rx_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_CRC_STRIP   |
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         rxq->crc_len = (uint8_t)((dev->data->dev_conf.rxmode.offloads &
1724                         DEV_RX_OFFLOAD_CRC_STRIP) ? 0 : ETHER_CRC_LEN);
1725
1726         /*
1727          *  Allocate RX ring hardware descriptors. A memzone large enough to
1728          *  handle the maximum ring size is allocated in order to allow for
1729          *  resizing in later calls to the queue setup function.
1730          */
1731         size = sizeof(union e1000_adv_rx_desc) * E1000_MAX_RING_DESC;
1732         rz = rte_eth_dma_zone_reserve(dev, "rx_ring", queue_idx, size,
1733                                       E1000_ALIGN, socket_id);
1734         if (rz == NULL) {
1735                 igb_rx_queue_release(rxq);
1736                 return -ENOMEM;
1737         }
1738         rxq->rdt_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDT(rxq->reg_idx));
1739         rxq->rdh_reg_addr = E1000_PCI_REG_ADDR(hw, E1000_RDH(rxq->reg_idx));
1740         rxq->rx_ring_phys_addr = rz->iova;
1741         rxq->rx_ring = (union e1000_adv_rx_desc *) rz->addr;
1742
1743         /* Allocate software ring. */
1744         rxq->sw_ring = rte_zmalloc("rxq->sw_ring",
1745                                    sizeof(struct igb_rx_entry) * nb_desc,
1746                                    RTE_CACHE_LINE_SIZE);
1747         if (rxq->sw_ring == NULL) {
1748                 igb_rx_queue_release(rxq);
1749                 return -ENOMEM;
1750         }
1751         PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
1752                      rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr);
1753
1754         dev->data->rx_queues[queue_idx] = rxq;
1755         igb_reset_rx_queue(rxq);
1756
1757         return 0;
1758 }
1759
1760 uint32_t
1761 eth_igb_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1762 {
1763 #define IGB_RXQ_SCAN_INTERVAL 4
1764         volatile union e1000_adv_rx_desc *rxdp;
1765         struct igb_rx_queue *rxq;
1766         uint32_t desc = 0;
1767
1768         rxq = dev->data->rx_queues[rx_queue_id];
1769         rxdp = &(rxq->rx_ring[rxq->rx_tail]);
1770
1771         while ((desc < rxq->nb_rx_desc) &&
1772                 (rxdp->wb.upper.status_error & E1000_RXD_STAT_DD)) {
1773                 desc += IGB_RXQ_SCAN_INTERVAL;
1774                 rxdp += IGB_RXQ_SCAN_INTERVAL;
1775                 if (rxq->rx_tail + desc >= rxq->nb_rx_desc)
1776                         rxdp = &(rxq->rx_ring[rxq->rx_tail +
1777                                 desc - rxq->nb_rx_desc]);
1778         }
1779
1780         return desc;
1781 }
1782
1783 int
1784 eth_igb_rx_descriptor_done(void *rx_queue, uint16_t offset)
1785 {
1786         volatile union e1000_adv_rx_desc *rxdp;
1787         struct igb_rx_queue *rxq = rx_queue;
1788         uint32_t desc;
1789
1790         if (unlikely(offset >= rxq->nb_rx_desc))
1791                 return 0;
1792         desc = rxq->rx_tail + offset;
1793         if (desc >= rxq->nb_rx_desc)
1794                 desc -= rxq->nb_rx_desc;
1795
1796         rxdp = &rxq->rx_ring[desc];
1797         return !!(rxdp->wb.upper.status_error & E1000_RXD_STAT_DD);
1798 }
1799
1800 int
1801 eth_igb_rx_descriptor_status(void *rx_queue, uint16_t offset)
1802 {
1803         struct igb_rx_queue *rxq = rx_queue;
1804         volatile uint32_t *status;
1805         uint32_t desc;
1806
1807         if (unlikely(offset >= rxq->nb_rx_desc))
1808                 return -EINVAL;
1809
1810         if (offset >= rxq->nb_rx_desc - rxq->nb_rx_hold)
1811                 return RTE_ETH_RX_DESC_UNAVAIL;
1812
1813         desc = rxq->rx_tail + offset;
1814         if (desc >= rxq->nb_rx_desc)
1815                 desc -= rxq->nb_rx_desc;
1816
1817         status = &rxq->rx_ring[desc].wb.upper.status_error;
1818         if (*status & rte_cpu_to_le_32(E1000_RXD_STAT_DD))
1819                 return RTE_ETH_RX_DESC_DONE;
1820
1821         return RTE_ETH_RX_DESC_AVAIL;
1822 }
1823
1824 int
1825 eth_igb_tx_descriptor_status(void *tx_queue, uint16_t offset)
1826 {
1827         struct igb_tx_queue *txq = tx_queue;
1828         volatile uint32_t *status;
1829         int32_t desc;
1830
1831         if (unlikely(offset >= txq->nb_tx_desc))
1832                 return -EINVAL;
1833
1834         desc = txq->tx_tail - offset - 1;
1835         if (desc < 0)
1836                 desc += txq->nb_tx_desc;
1837         desc = txq->sw_ring[desc].last_id;
1838
1839         status = &txq->tx_ring[desc].wb.status;
1840         if (*status & rte_cpu_to_le_32(E1000_TXD_STAT_DD))
1841                 return RTE_ETH_TX_DESC_DONE;
1842
1843         return RTE_ETH_TX_DESC_FULL;
1844 }
1845
1846 void
1847 igb_dev_clear_queues(struct rte_eth_dev *dev)
1848 {
1849         uint16_t i;
1850         struct igb_tx_queue *txq;
1851         struct igb_rx_queue *rxq;
1852
1853         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1854                 txq = dev->data->tx_queues[i];
1855                 if (txq != NULL) {
1856                         igb_tx_queue_release_mbufs(txq);
1857                         igb_reset_tx_queue(txq, dev);
1858                 }
1859         }
1860
1861         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1862                 rxq = dev->data->rx_queues[i];
1863                 if (rxq != NULL) {
1864                         igb_rx_queue_release_mbufs(rxq);
1865                         igb_reset_rx_queue(rxq);
1866                 }
1867         }
1868 }
1869
1870 void
1871 igb_dev_free_queues(struct rte_eth_dev *dev)
1872 {
1873         uint16_t i;
1874
1875         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1876                 eth_igb_rx_queue_release(dev->data->rx_queues[i]);
1877                 dev->data->rx_queues[i] = NULL;
1878         }
1879         dev->data->nb_rx_queues = 0;
1880
1881         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1882                 eth_igb_tx_queue_release(dev->data->tx_queues[i]);
1883                 dev->data->tx_queues[i] = NULL;
1884         }
1885         dev->data->nb_tx_queues = 0;
1886 }
1887
1888 /**
1889  * Receive Side Scaling (RSS).
1890  * See section 7.1.1.7 in the following document:
1891  *     "Intel 82576 GbE Controller Datasheet" - Revision 2.45 October 2009
1892  *
1893  * Principles:
1894  * The source and destination IP addresses of the IP header and the source and
1895  * destination ports of TCP/UDP headers, if any, of received packets are hashed
1896  * against a configurable random key to compute a 32-bit RSS hash result.
1897  * The seven (7) LSBs of the 32-bit hash result are used as an index into a
1898  * 128-entry redirection table (RETA).  Each entry of the RETA provides a 3-bit
1899  * RSS output index which is used as the RX queue index where to store the
1900  * received packets.
1901  * The following output is supplied in the RX write-back descriptor:
1902  *     - 32-bit result of the Microsoft RSS hash function,
1903  *     - 4-bit RSS type field.
1904  */
1905
1906 /*
1907  * RSS random key supplied in section 7.1.1.7.3 of the Intel 82576 datasheet.
1908  * Used as the default key.
1909  */
1910 static uint8_t rss_intel_key[40] = {
1911         0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
1912         0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
1913         0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
1914         0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
1915         0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
1916 };
1917
1918 static void
1919 igb_rss_disable(struct rte_eth_dev *dev)
1920 {
1921         struct e1000_hw *hw;
1922         uint32_t mrqc;
1923
1924         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1925         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1926         mrqc &= ~E1000_MRQC_ENABLE_MASK;
1927         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1928 }
1929
1930 static void
1931 igb_hw_rss_hash_set(struct e1000_hw *hw, struct rte_eth_rss_conf *rss_conf)
1932 {
1933         uint8_t  *hash_key;
1934         uint32_t rss_key;
1935         uint32_t mrqc;
1936         uint64_t rss_hf;
1937         uint16_t i;
1938
1939         hash_key = rss_conf->rss_key;
1940         if (hash_key != NULL) {
1941                 /* Fill in RSS hash key */
1942                 for (i = 0; i < 10; i++) {
1943                         rss_key  = hash_key[(i * 4)];
1944                         rss_key |= hash_key[(i * 4) + 1] << 8;
1945                         rss_key |= hash_key[(i * 4) + 2] << 16;
1946                         rss_key |= hash_key[(i * 4) + 3] << 24;
1947                         E1000_WRITE_REG_ARRAY(hw, E1000_RSSRK(0), i, rss_key);
1948                 }
1949         }
1950
1951         /* Set configured hashing protocols in MRQC register */
1952         rss_hf = rss_conf->rss_hf;
1953         mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* RSS enabled. */
1954         if (rss_hf & ETH_RSS_IPV4)
1955                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4;
1956         if (rss_hf & ETH_RSS_NONFRAG_IPV4_TCP)
1957                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_TCP;
1958         if (rss_hf & ETH_RSS_IPV6)
1959                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6;
1960         if (rss_hf & ETH_RSS_IPV6_EX)
1961                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_EX;
1962         if (rss_hf & ETH_RSS_NONFRAG_IPV6_TCP)
1963                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP;
1964         if (rss_hf & ETH_RSS_IPV6_TCP_EX)
1965                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
1966         if (rss_hf & ETH_RSS_NONFRAG_IPV4_UDP)
1967                 mrqc |= E1000_MRQC_RSS_FIELD_IPV4_UDP;
1968         if (rss_hf & ETH_RSS_NONFRAG_IPV6_UDP)
1969                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP;
1970         if (rss_hf & ETH_RSS_IPV6_UDP_EX)
1971                 mrqc |= E1000_MRQC_RSS_FIELD_IPV6_UDP_EX;
1972         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
1973 }
1974
1975 int
1976 eth_igb_rss_hash_update(struct rte_eth_dev *dev,
1977                         struct rte_eth_rss_conf *rss_conf)
1978 {
1979         struct e1000_hw *hw;
1980         uint32_t mrqc;
1981         uint64_t rss_hf;
1982
1983         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
1984
1985         /*
1986          * Before changing anything, first check that the update RSS operation
1987          * does not attempt to disable RSS, if RSS was enabled at
1988          * initialization time, or does not attempt to enable RSS, if RSS was
1989          * disabled at initialization time.
1990          */
1991         rss_hf = rss_conf->rss_hf & IGB_RSS_OFFLOAD_ALL;
1992         mrqc = E1000_READ_REG(hw, E1000_MRQC);
1993         if (!(mrqc & E1000_MRQC_ENABLE_MASK)) { /* RSS disabled */
1994                 if (rss_hf != 0) /* Enable RSS */
1995                         return -(EINVAL);
1996                 return 0; /* Nothing to do */
1997         }
1998         /* RSS enabled */
1999         if (rss_hf == 0) /* Disable RSS */
2000                 return -(EINVAL);
2001         igb_hw_rss_hash_set(hw, rss_conf);
2002         return 0;
2003 }
2004
2005 int eth_igb_rss_hash_conf_get(struct rte_eth_dev *dev,
2006                               struct rte_eth_rss_conf *rss_conf)
2007 {
2008         struct e1000_hw *hw;
2009         uint8_t *hash_key;
2010         uint32_t rss_key;
2011         uint32_t mrqc;
2012         uint64_t rss_hf;
2013         uint16_t i;
2014
2015         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2016         hash_key = rss_conf->rss_key;
2017         if (hash_key != NULL) {
2018                 /* Return RSS hash key */
2019                 for (i = 0; i < 10; i++) {
2020                         rss_key = E1000_READ_REG_ARRAY(hw, E1000_RSSRK(0), i);
2021                         hash_key[(i * 4)] = rss_key & 0x000000FF;
2022                         hash_key[(i * 4) + 1] = (rss_key >> 8) & 0x000000FF;
2023                         hash_key[(i * 4) + 2] = (rss_key >> 16) & 0x000000FF;
2024                         hash_key[(i * 4) + 3] = (rss_key >> 24) & 0x000000FF;
2025                 }
2026         }
2027
2028         /* Get RSS functions configured in MRQC register */
2029         mrqc = E1000_READ_REG(hw, E1000_MRQC);
2030         if ((mrqc & E1000_MRQC_ENABLE_RSS_4Q) == 0) { /* RSS is disabled */
2031                 rss_conf->rss_hf = 0;
2032                 return 0;
2033         }
2034         rss_hf = 0;
2035         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4)
2036                 rss_hf |= ETH_RSS_IPV4;
2037         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_TCP)
2038                 rss_hf |= ETH_RSS_NONFRAG_IPV4_TCP;
2039         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6)
2040                 rss_hf |= ETH_RSS_IPV6;
2041         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_EX)
2042                 rss_hf |= ETH_RSS_IPV6_EX;
2043         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP)
2044                 rss_hf |= ETH_RSS_NONFRAG_IPV6_TCP;
2045         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_TCP_EX)
2046                 rss_hf |= ETH_RSS_IPV6_TCP_EX;
2047         if (mrqc & E1000_MRQC_RSS_FIELD_IPV4_UDP)
2048                 rss_hf |= ETH_RSS_NONFRAG_IPV4_UDP;
2049         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP)
2050                 rss_hf |= ETH_RSS_NONFRAG_IPV6_UDP;
2051         if (mrqc & E1000_MRQC_RSS_FIELD_IPV6_UDP_EX)
2052                 rss_hf |= ETH_RSS_IPV6_UDP_EX;
2053         rss_conf->rss_hf = rss_hf;
2054         return 0;
2055 }
2056
2057 static void
2058 igb_rss_configure(struct rte_eth_dev *dev)
2059 {
2060         struct rte_eth_rss_conf rss_conf;
2061         struct e1000_hw *hw;
2062         uint32_t shift;
2063         uint16_t i;
2064
2065         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2066
2067         /* Fill in redirection table. */
2068         shift = (hw->mac.type == e1000_82575) ? 6 : 0;
2069         for (i = 0; i < 128; i++) {
2070                 union e1000_reta {
2071                         uint32_t dword;
2072                         uint8_t  bytes[4];
2073                 } reta;
2074                 uint8_t q_idx;
2075
2076                 q_idx = (uint8_t) ((dev->data->nb_rx_queues > 1) ?
2077                                    i % dev->data->nb_rx_queues : 0);
2078                 reta.bytes[i & 3] = (uint8_t) (q_idx << shift);
2079                 if ((i & 3) == 3)
2080                         E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
2081         }
2082
2083         /*
2084          * Configure the RSS key and the RSS protocols used to compute
2085          * the RSS hash of input packets.
2086          */
2087         rss_conf = dev->data->dev_conf.rx_adv_conf.rss_conf;
2088         if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) {
2089                 igb_rss_disable(dev);
2090                 return;
2091         }
2092         if (rss_conf.rss_key == NULL)
2093                 rss_conf.rss_key = rss_intel_key; /* Default hash key */
2094         igb_hw_rss_hash_set(hw, &rss_conf);
2095 }
2096
2097 /*
2098  * Check if the mac type support VMDq or not.
2099  * Return 1 if it supports, otherwise, return 0.
2100  */
2101 static int
2102 igb_is_vmdq_supported(const struct rte_eth_dev *dev)
2103 {
2104         const struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2105
2106         switch (hw->mac.type) {
2107         case e1000_82576:
2108         case e1000_82580:
2109         case e1000_i350:
2110                 return 1;
2111         case e1000_82540:
2112         case e1000_82541:
2113         case e1000_82542:
2114         case e1000_82543:
2115         case e1000_82544:
2116         case e1000_82545:
2117         case e1000_82546:
2118         case e1000_82547:
2119         case e1000_82571:
2120         case e1000_82572:
2121         case e1000_82573:
2122         case e1000_82574:
2123         case e1000_82583:
2124         case e1000_i210:
2125         case e1000_i211:
2126         default:
2127                 PMD_INIT_LOG(ERR, "Cannot support VMDq feature");
2128                 return 0;
2129         }
2130 }
2131
2132 static int
2133 igb_vmdq_rx_hw_configure(struct rte_eth_dev *dev)
2134 {
2135         struct rte_eth_vmdq_rx_conf *cfg;
2136         struct e1000_hw *hw;
2137         uint32_t mrqc, vt_ctl, vmolr, rctl;
2138         int i;
2139
2140         PMD_INIT_FUNC_TRACE();
2141
2142         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2143         cfg = &dev->data->dev_conf.rx_adv_conf.vmdq_rx_conf;
2144
2145         /* Check if mac type can support VMDq, return value of 0 means NOT support */
2146         if (igb_is_vmdq_supported(dev) == 0)
2147                 return -1;
2148
2149         igb_rss_disable(dev);
2150
2151         /* RCTL: eanble VLAN filter */
2152         rctl = E1000_READ_REG(hw, E1000_RCTL);
2153         rctl |= E1000_RCTL_VFE;
2154         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
2155
2156         /* MRQC: enable vmdq */
2157         mrqc = E1000_READ_REG(hw, E1000_MRQC);
2158         mrqc |= E1000_MRQC_ENABLE_VMDQ;
2159         E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
2160
2161         /* VTCTL:  pool selection according to VLAN tag */
2162         vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
2163         if (cfg->enable_default_pool)
2164                 vt_ctl |= (cfg->default_pool << E1000_VT_CTL_DEFAULT_POOL_SHIFT);
2165         vt_ctl |= E1000_VT_CTL_IGNORE_MAC;
2166         E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
2167
2168         for (i = 0; i < E1000_VMOLR_SIZE; i++) {
2169                 vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
2170                 vmolr &= ~(E1000_VMOLR_AUPE | E1000_VMOLR_ROMPE |
2171                         E1000_VMOLR_ROPE | E1000_VMOLR_BAM |
2172                         E1000_VMOLR_MPME);
2173
2174                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_UNTAG)
2175                         vmolr |= E1000_VMOLR_AUPE;
2176                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_MC)
2177                         vmolr |= E1000_VMOLR_ROMPE;
2178                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_HASH_UC)
2179                         vmolr |= E1000_VMOLR_ROPE;
2180                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_BROADCAST)
2181                         vmolr |= E1000_VMOLR_BAM;
2182                 if (cfg->rx_mode & ETH_VMDQ_ACCEPT_MULTICAST)
2183                         vmolr |= E1000_VMOLR_MPME;
2184
2185                 E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
2186         }
2187
2188         /*
2189          * VMOLR: set STRVLAN as 1 if IGMAC in VTCTL is set as 1
2190          * Both 82576 and 82580 support it
2191          */
2192         if (hw->mac.type != e1000_i350) {
2193                 for (i = 0; i < E1000_VMOLR_SIZE; i++) {
2194                         vmolr = E1000_READ_REG(hw, E1000_VMOLR(i));
2195                         vmolr |= E1000_VMOLR_STRVLAN;
2196                         E1000_WRITE_REG(hw, E1000_VMOLR(i), vmolr);
2197                 }
2198         }
2199
2200         /* VFTA - enable all vlan filters */
2201         for (i = 0; i < IGB_VFTA_SIZE; i++)
2202                 E1000_WRITE_REG(hw, (E1000_VFTA+(i*4)), UINT32_MAX);
2203
2204         /* VFRE: 8 pools enabling for rx, both 82576 and i350 support it */
2205         if (hw->mac.type != e1000_82580)
2206                 E1000_WRITE_REG(hw, E1000_VFRE, E1000_MBVFICR_VFREQ_MASK);
2207
2208         /*
2209          * RAH/RAL - allow pools to read specific mac addresses
2210          * In this case, all pools should be able to read from mac addr 0
2211          */
2212         E1000_WRITE_REG(hw, E1000_RAH(0), (E1000_RAH_AV | UINT16_MAX));
2213         E1000_WRITE_REG(hw, E1000_RAL(0), UINT32_MAX);
2214
2215         /* VLVF: set up filters for vlan tags as configured */
2216         for (i = 0; i < cfg->nb_pool_maps; i++) {
2217                 /* set vlan id in VF register and set the valid bit */
2218                 E1000_WRITE_REG(hw, E1000_VLVF(i), (E1000_VLVF_VLANID_ENABLE | \
2219                         (cfg->pool_map[i].vlan_id & ETH_VLAN_ID_MAX) | \
2220                         ((cfg->pool_map[i].pools << E1000_VLVF_POOLSEL_SHIFT ) & \
2221                         E1000_VLVF_POOLSEL_MASK)));
2222         }
2223
2224         E1000_WRITE_FLUSH(hw);
2225
2226         return 0;
2227 }
2228
2229
2230 /*********************************************************************
2231  *
2232  *  Enable receive unit.
2233  *
2234  **********************************************************************/
2235
2236 static int
2237 igb_alloc_rx_queue_mbufs(struct igb_rx_queue *rxq)
2238 {
2239         struct igb_rx_entry *rxe = rxq->sw_ring;
2240         uint64_t dma_addr;
2241         unsigned i;
2242
2243         /* Initialize software ring entries. */
2244         for (i = 0; i < rxq->nb_rx_desc; i++) {
2245                 volatile union e1000_adv_rx_desc *rxd;
2246                 struct rte_mbuf *mbuf = rte_mbuf_raw_alloc(rxq->mb_pool);
2247
2248                 if (mbuf == NULL) {
2249                         PMD_INIT_LOG(ERR, "RX mbuf alloc failed "
2250                                      "queue_id=%hu", rxq->queue_id);
2251                         return -ENOMEM;
2252                 }
2253                 dma_addr =
2254                         rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
2255                 rxd = &rxq->rx_ring[i];
2256                 rxd->read.hdr_addr = 0;
2257                 rxd->read.pkt_addr = dma_addr;
2258                 rxe[i].mbuf = mbuf;
2259         }
2260
2261         return 0;
2262 }
2263
2264 #define E1000_MRQC_DEF_Q_SHIFT               (3)
2265 static int
2266 igb_dev_mq_rx_configure(struct rte_eth_dev *dev)
2267 {
2268         struct e1000_hw *hw =
2269                 E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2270         uint32_t mrqc;
2271
2272         if (RTE_ETH_DEV_SRIOV(dev).active == ETH_8_POOLS) {
2273                 /*
2274                  * SRIOV active scheme
2275                  * FIXME if support RSS together with VMDq & SRIOV
2276                  */
2277                 mrqc = E1000_MRQC_ENABLE_VMDQ;
2278                 /* 011b Def_Q ignore, according to VT_CTL.DEF_PL */
2279                 mrqc |= 0x3 << E1000_MRQC_DEF_Q_SHIFT;
2280                 E1000_WRITE_REG(hw, E1000_MRQC, mrqc);
2281         } else if(RTE_ETH_DEV_SRIOV(dev).active == 0) {
2282                 /*
2283                  * SRIOV inactive scheme
2284                  */
2285                 switch (dev->data->dev_conf.rxmode.mq_mode) {
2286                         case ETH_MQ_RX_RSS:
2287                                 igb_rss_configure(dev);
2288                                 break;
2289                         case ETH_MQ_RX_VMDQ_ONLY:
2290                                 /*Configure general VMDQ only RX parameters*/
2291                                 igb_vmdq_rx_hw_configure(dev);
2292                                 break;
2293                         case ETH_MQ_RX_NONE:
2294                                 /* if mq_mode is none, disable rss mode.*/
2295                         default:
2296                                 igb_rss_disable(dev);
2297                                 break;
2298                 }
2299         }
2300
2301         return 0;
2302 }
2303
2304 int
2305 eth_igb_rx_init(struct rte_eth_dev *dev)
2306 {
2307         struct rte_eth_rxmode *rxmode;
2308         struct e1000_hw     *hw;
2309         struct igb_rx_queue *rxq;
2310         uint32_t rctl;
2311         uint32_t rxcsum;
2312         uint32_t srrctl;
2313         uint16_t buf_size;
2314         uint16_t rctl_bsize;
2315         uint16_t i;
2316         int ret;
2317
2318         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2319         srrctl = 0;
2320
2321         /*
2322          * Make sure receives are disabled while setting
2323          * up the descriptor ring.
2324          */
2325         rctl = E1000_READ_REG(hw, E1000_RCTL);
2326         E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN);
2327
2328         rxmode = &dev->data->dev_conf.rxmode;
2329
2330         /*
2331          * Configure support of jumbo frames, if any.
2332          */
2333         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
2334                 rctl |= E1000_RCTL_LPE;
2335
2336                 /*
2337                  * Set maximum packet length by default, and might be updated
2338                  * together with enabling/disabling dual VLAN.
2339                  */
2340                 E1000_WRITE_REG(hw, E1000_RLPML,
2341                         dev->data->dev_conf.rxmode.max_rx_pkt_len +
2342                                                 VLAN_TAG_SIZE);
2343         } else
2344                 rctl &= ~E1000_RCTL_LPE;
2345
2346         /* Configure and enable each RX queue. */
2347         rctl_bsize = 0;
2348         dev->rx_pkt_burst = eth_igb_recv_pkts;
2349         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2350                 uint64_t bus_addr;
2351                 uint32_t rxdctl;
2352
2353                 rxq = dev->data->rx_queues[i];
2354
2355                 rxq->flags = 0;
2356                 /*
2357                  * i350 and i354 vlan packets have vlan tags byte swapped.
2358                  */
2359                 if (hw->mac.type == e1000_i350 || hw->mac.type == e1000_i354) {
2360                         rxq->flags |= IGB_RXQ_FLAG_LB_BSWAP_VLAN;
2361                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap required");
2362                 } else {
2363                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap not required");
2364                 }
2365
2366                 /* Allocate buffers for descriptor rings and set up queue */
2367                 ret = igb_alloc_rx_queue_mbufs(rxq);
2368                 if (ret)
2369                         return ret;
2370
2371                 /*
2372                  * Reset crc_len in case it was changed after queue setup by a
2373                  *  call to configure
2374                  */
2375                 rxq->crc_len = (uint8_t)(dev->data->dev_conf.rxmode.offloads &
2376                                 DEV_RX_OFFLOAD_CRC_STRIP ? 0 : ETHER_CRC_LEN);
2377
2378                 bus_addr = rxq->rx_ring_phys_addr;
2379                 E1000_WRITE_REG(hw, E1000_RDLEN(rxq->reg_idx),
2380                                 rxq->nb_rx_desc *
2381                                 sizeof(union e1000_adv_rx_desc));
2382                 E1000_WRITE_REG(hw, E1000_RDBAH(rxq->reg_idx),
2383                                 (uint32_t)(bus_addr >> 32));
2384                 E1000_WRITE_REG(hw, E1000_RDBAL(rxq->reg_idx), (uint32_t)bus_addr);
2385
2386                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2387
2388                 /*
2389                  * Configure RX buffer size.
2390                  */
2391                 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
2392                         RTE_PKTMBUF_HEADROOM);
2393                 if (buf_size >= 1024) {
2394                         /*
2395                          * Configure the BSIZEPACKET field of the SRRCTL
2396                          * register of the queue.
2397                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
2398                          * If this field is equal to 0b, then RCTL.BSIZE
2399                          * determines the RX packet buffer size.
2400                          */
2401                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2402                                    E1000_SRRCTL_BSIZEPKT_MASK);
2403                         buf_size = (uint16_t) ((srrctl &
2404                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
2405                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
2406
2407                         /* It adds dual VLAN length for supporting dual VLAN */
2408                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2409                                                 2 * VLAN_TAG_SIZE) > buf_size){
2410                                 if (!dev->data->scattered_rx)
2411                                         PMD_INIT_LOG(DEBUG,
2412                                                      "forcing scatter mode");
2413                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2414                                 dev->data->scattered_rx = 1;
2415                         }
2416                 } else {
2417                         /*
2418                          * Use BSIZE field of the device RCTL register.
2419                          */
2420                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2421                                 rctl_bsize = buf_size;
2422                         if (!dev->data->scattered_rx)
2423                                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2424                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2425                         dev->data->scattered_rx = 1;
2426                 }
2427
2428                 /* Set if packets are dropped when no descriptors available */
2429                 if (rxq->drop_en)
2430                         srrctl |= E1000_SRRCTL_DROP_EN;
2431
2432                 E1000_WRITE_REG(hw, E1000_SRRCTL(rxq->reg_idx), srrctl);
2433
2434                 /* Enable this RX queue. */
2435                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(rxq->reg_idx));
2436                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2437                 rxdctl &= 0xFFF00000;
2438                 rxdctl |= (rxq->pthresh & 0x1F);
2439                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2440                 rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2441                 E1000_WRITE_REG(hw, E1000_RXDCTL(rxq->reg_idx), rxdctl);
2442         }
2443
2444         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_SCATTER) {
2445                 if (!dev->data->scattered_rx)
2446                         PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2447                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2448                 dev->data->scattered_rx = 1;
2449         }
2450
2451         /*
2452          * Setup BSIZE field of RCTL register, if needed.
2453          * Buffer sizes >= 1024 are not [supposed to be] setup in the RCTL
2454          * register, since the code above configures the SRRCTL register of
2455          * the RX queue in such a case.
2456          * All configurable sizes are:
2457          * 16384: rctl |= (E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX);
2458          *  8192: rctl |= (E1000_RCTL_SZ_8192  | E1000_RCTL_BSEX);
2459          *  4096: rctl |= (E1000_RCTL_SZ_4096  | E1000_RCTL_BSEX);
2460          *  2048: rctl |= E1000_RCTL_SZ_2048;
2461          *  1024: rctl |= E1000_RCTL_SZ_1024;
2462          *   512: rctl |= E1000_RCTL_SZ_512;
2463          *   256: rctl |= E1000_RCTL_SZ_256;
2464          */
2465         if (rctl_bsize > 0) {
2466                 if (rctl_bsize >= 512) /* 512 <= buf_size < 1024 - use 512 */
2467                         rctl |= E1000_RCTL_SZ_512;
2468                 else /* 256 <= buf_size < 512 - use 256 */
2469                         rctl |= E1000_RCTL_SZ_256;
2470         }
2471
2472         /*
2473          * Configure RSS if device configured with multiple RX queues.
2474          */
2475         igb_dev_mq_rx_configure(dev);
2476
2477         /* Update the rctl since igb_dev_mq_rx_configure may change its value */
2478         rctl |= E1000_READ_REG(hw, E1000_RCTL);
2479
2480         /*
2481          * Setup the Checksum Register.
2482          * Receive Full-Packet Checksum Offload is mutually exclusive with RSS.
2483          */
2484         rxcsum = E1000_READ_REG(hw, E1000_RXCSUM);
2485         rxcsum |= E1000_RXCSUM_PCSD;
2486
2487         /* Enable both L3/L4 rx checksum offload */
2488         if (rxmode->offloads & DEV_RX_OFFLOAD_IPV4_CKSUM)
2489                 rxcsum |= E1000_RXCSUM_IPOFL;
2490         else
2491                 rxcsum &= ~E1000_RXCSUM_IPOFL;
2492         if (rxmode->offloads &
2493                 (DEV_RX_OFFLOAD_TCP_CKSUM | DEV_RX_OFFLOAD_UDP_CKSUM))
2494                 rxcsum |= E1000_RXCSUM_TUOFL;
2495         else
2496                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2497         if (rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
2498                 rxcsum |= E1000_RXCSUM_CRCOFL;
2499         else
2500                 rxcsum &= ~E1000_RXCSUM_CRCOFL;
2501
2502         E1000_WRITE_REG(hw, E1000_RXCSUM, rxcsum);
2503
2504         /* Setup the Receive Control Register. */
2505         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_CRC_STRIP) {
2506                 rctl |= E1000_RCTL_SECRC; /* Strip Ethernet CRC. */
2507
2508                 /* set STRCRC bit in all queues */
2509                 if (hw->mac.type == e1000_i350 ||
2510                     hw->mac.type == e1000_i210 ||
2511                     hw->mac.type == e1000_i211 ||
2512                     hw->mac.type == e1000_i354) {
2513                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2514                                 rxq = dev->data->rx_queues[i];
2515                                 uint32_t dvmolr = E1000_READ_REG(hw,
2516                                         E1000_DVMOLR(rxq->reg_idx));
2517                                 dvmolr |= E1000_DVMOLR_STRCRC;
2518                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
2519                         }
2520                 }
2521         } else {
2522                 rctl &= ~E1000_RCTL_SECRC; /* Do not Strip Ethernet CRC. */
2523
2524                 /* clear STRCRC bit in all queues */
2525                 if (hw->mac.type == e1000_i350 ||
2526                     hw->mac.type == e1000_i210 ||
2527                     hw->mac.type == e1000_i211 ||
2528                     hw->mac.type == e1000_i354) {
2529                         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2530                                 rxq = dev->data->rx_queues[i];
2531                                 uint32_t dvmolr = E1000_READ_REG(hw,
2532                                         E1000_DVMOLR(rxq->reg_idx));
2533                                 dvmolr &= ~E1000_DVMOLR_STRCRC;
2534                                 E1000_WRITE_REG(hw, E1000_DVMOLR(rxq->reg_idx), dvmolr);
2535                         }
2536                 }
2537         }
2538
2539         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2540         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
2541                 E1000_RCTL_RDMTS_HALF |
2542                 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2543
2544         /* Make sure VLAN Filters are off. */
2545         if (dev->data->dev_conf.rxmode.mq_mode != ETH_MQ_RX_VMDQ_ONLY)
2546                 rctl &= ~E1000_RCTL_VFE;
2547         /* Don't store bad packets. */
2548         rctl &= ~E1000_RCTL_SBP;
2549
2550         /* Enable Receives. */
2551         E1000_WRITE_REG(hw, E1000_RCTL, rctl);
2552
2553         /*
2554          * Setup the HW Rx Head and Tail Descriptor Pointers.
2555          * This needs to be done after enable.
2556          */
2557         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2558                 rxq = dev->data->rx_queues[i];
2559                 E1000_WRITE_REG(hw, E1000_RDH(rxq->reg_idx), 0);
2560                 E1000_WRITE_REG(hw, E1000_RDT(rxq->reg_idx), rxq->nb_rx_desc - 1);
2561         }
2562
2563         return 0;
2564 }
2565
2566 /*********************************************************************
2567  *
2568  *  Enable transmit unit.
2569  *
2570  **********************************************************************/
2571 void
2572 eth_igb_tx_init(struct rte_eth_dev *dev)
2573 {
2574         struct e1000_hw     *hw;
2575         struct igb_tx_queue *txq;
2576         uint32_t tctl;
2577         uint32_t txdctl;
2578         uint16_t i;
2579
2580         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2581
2582         /* Setup the Base and Length of the Tx Descriptor Rings. */
2583         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2584                 uint64_t bus_addr;
2585                 txq = dev->data->tx_queues[i];
2586                 bus_addr = txq->tx_ring_phys_addr;
2587
2588                 E1000_WRITE_REG(hw, E1000_TDLEN(txq->reg_idx),
2589                                 txq->nb_tx_desc *
2590                                 sizeof(union e1000_adv_tx_desc));
2591                 E1000_WRITE_REG(hw, E1000_TDBAH(txq->reg_idx),
2592                                 (uint32_t)(bus_addr >> 32));
2593                 E1000_WRITE_REG(hw, E1000_TDBAL(txq->reg_idx), (uint32_t)bus_addr);
2594
2595                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2596                 E1000_WRITE_REG(hw, E1000_TDT(txq->reg_idx), 0);
2597                 E1000_WRITE_REG(hw, E1000_TDH(txq->reg_idx), 0);
2598
2599                 /* Setup Transmit threshold registers. */
2600                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(txq->reg_idx));
2601                 txdctl |= txq->pthresh & 0x1F;
2602                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2603                 txdctl |= ((txq->wthresh & 0x1F) << 16);
2604                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2605                 E1000_WRITE_REG(hw, E1000_TXDCTL(txq->reg_idx), txdctl);
2606         }
2607
2608         /* Program the Transmit Control Register. */
2609         tctl = E1000_READ_REG(hw, E1000_TCTL);
2610         tctl &= ~E1000_TCTL_CT;
2611         tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN |
2612                  (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT));
2613
2614         e1000_config_collision_dist(hw);
2615
2616         /* This write will effectively turn on the transmit unit. */
2617         E1000_WRITE_REG(hw, E1000_TCTL, tctl);
2618 }
2619
2620 /*********************************************************************
2621  *
2622  *  Enable VF receive unit.
2623  *
2624  **********************************************************************/
2625 int
2626 eth_igbvf_rx_init(struct rte_eth_dev *dev)
2627 {
2628         struct e1000_hw     *hw;
2629         struct igb_rx_queue *rxq;
2630         uint32_t srrctl;
2631         uint16_t buf_size;
2632         uint16_t rctl_bsize;
2633         uint16_t i;
2634         int ret;
2635
2636         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2637
2638         /* setup MTU */
2639         e1000_rlpml_set_vf(hw,
2640                 (uint16_t)(dev->data->dev_conf.rxmode.max_rx_pkt_len +
2641                 VLAN_TAG_SIZE));
2642
2643         /* Configure and enable each RX queue. */
2644         rctl_bsize = 0;
2645         dev->rx_pkt_burst = eth_igb_recv_pkts;
2646         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2647                 uint64_t bus_addr;
2648                 uint32_t rxdctl;
2649
2650                 rxq = dev->data->rx_queues[i];
2651
2652                 rxq->flags = 0;
2653                 /*
2654                  * i350VF LB vlan packets have vlan tags byte swapped.
2655                  */
2656                 if (hw->mac.type == e1000_vfadapt_i350) {
2657                         rxq->flags |= IGB_RXQ_FLAG_LB_BSWAP_VLAN;
2658                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap required");
2659                 } else {
2660                         PMD_INIT_LOG(DEBUG, "IGB rx vlan bswap not required");
2661                 }
2662
2663                 /* Allocate buffers for descriptor rings and set up queue */
2664                 ret = igb_alloc_rx_queue_mbufs(rxq);
2665                 if (ret)
2666                         return ret;
2667
2668                 bus_addr = rxq->rx_ring_phys_addr;
2669                 E1000_WRITE_REG(hw, E1000_RDLEN(i),
2670                                 rxq->nb_rx_desc *
2671                                 sizeof(union e1000_adv_rx_desc));
2672                 E1000_WRITE_REG(hw, E1000_RDBAH(i),
2673                                 (uint32_t)(bus_addr >> 32));
2674                 E1000_WRITE_REG(hw, E1000_RDBAL(i), (uint32_t)bus_addr);
2675
2676                 srrctl = E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2677
2678                 /*
2679                  * Configure RX buffer size.
2680                  */
2681                 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
2682                         RTE_PKTMBUF_HEADROOM);
2683                 if (buf_size >= 1024) {
2684                         /*
2685                          * Configure the BSIZEPACKET field of the SRRCTL
2686                          * register of the queue.
2687                          * Value is in 1 KB resolution, from 1 KB to 127 KB.
2688                          * If this field is equal to 0b, then RCTL.BSIZE
2689                          * determines the RX packet buffer size.
2690                          */
2691                         srrctl |= ((buf_size >> E1000_SRRCTL_BSIZEPKT_SHIFT) &
2692                                    E1000_SRRCTL_BSIZEPKT_MASK);
2693                         buf_size = (uint16_t) ((srrctl &
2694                                                 E1000_SRRCTL_BSIZEPKT_MASK) <<
2695                                                E1000_SRRCTL_BSIZEPKT_SHIFT);
2696
2697                         /* It adds dual VLAN length for supporting dual VLAN */
2698                         if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
2699                                                 2 * VLAN_TAG_SIZE) > buf_size){
2700                                 if (!dev->data->scattered_rx)
2701                                         PMD_INIT_LOG(DEBUG,
2702                                                      "forcing scatter mode");
2703                                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2704                                 dev->data->scattered_rx = 1;
2705                         }
2706                 } else {
2707                         /*
2708                          * Use BSIZE field of the device RCTL register.
2709                          */
2710                         if ((rctl_bsize == 0) || (rctl_bsize > buf_size))
2711                                 rctl_bsize = buf_size;
2712                         if (!dev->data->scattered_rx)
2713                                 PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2714                         dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2715                         dev->data->scattered_rx = 1;
2716                 }
2717
2718                 /* Set if packets are dropped when no descriptors available */
2719                 if (rxq->drop_en)
2720                         srrctl |= E1000_SRRCTL_DROP_EN;
2721
2722                 E1000_WRITE_REG(hw, E1000_SRRCTL(i), srrctl);
2723
2724                 /* Enable this RX queue. */
2725                 rxdctl = E1000_READ_REG(hw, E1000_RXDCTL(i));
2726                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2727                 rxdctl &= 0xFFF00000;
2728                 rxdctl |= (rxq->pthresh & 0x1F);
2729                 rxdctl |= ((rxq->hthresh & 0x1F) << 8);
2730                 if (hw->mac.type == e1000_vfadapt) {
2731                         /*
2732                          * Workaround of 82576 VF Erratum
2733                          * force set WTHRESH to 1
2734                          * to avoid Write-Back not triggered sometimes
2735                          */
2736                         rxdctl |= 0x10000;
2737                         PMD_INIT_LOG(DEBUG, "Force set RX WTHRESH to 1 !");
2738                 }
2739                 else
2740                         rxdctl |= ((rxq->wthresh & 0x1F) << 16);
2741                 E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl);
2742         }
2743
2744         if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_SCATTER) {
2745                 if (!dev->data->scattered_rx)
2746                         PMD_INIT_LOG(DEBUG, "forcing scatter mode");
2747                 dev->rx_pkt_burst = eth_igb_recv_scattered_pkts;
2748                 dev->data->scattered_rx = 1;
2749         }
2750
2751         /*
2752          * Setup the HW Rx Head and Tail Descriptor Pointers.
2753          * This needs to be done after enable.
2754          */
2755         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2756                 rxq = dev->data->rx_queues[i];
2757                 E1000_WRITE_REG(hw, E1000_RDH(i), 0);
2758                 E1000_WRITE_REG(hw, E1000_RDT(i), rxq->nb_rx_desc - 1);
2759         }
2760
2761         return 0;
2762 }
2763
2764 /*********************************************************************
2765  *
2766  *  Enable VF transmit unit.
2767  *
2768  **********************************************************************/
2769 void
2770 eth_igbvf_tx_init(struct rte_eth_dev *dev)
2771 {
2772         struct e1000_hw     *hw;
2773         struct igb_tx_queue *txq;
2774         uint32_t txdctl;
2775         uint16_t i;
2776
2777         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2778
2779         /* Setup the Base and Length of the Tx Descriptor Rings. */
2780         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2781                 uint64_t bus_addr;
2782
2783                 txq = dev->data->tx_queues[i];
2784                 bus_addr = txq->tx_ring_phys_addr;
2785                 E1000_WRITE_REG(hw, E1000_TDLEN(i),
2786                                 txq->nb_tx_desc *
2787                                 sizeof(union e1000_adv_tx_desc));
2788                 E1000_WRITE_REG(hw, E1000_TDBAH(i),
2789                                 (uint32_t)(bus_addr >> 32));
2790                 E1000_WRITE_REG(hw, E1000_TDBAL(i), (uint32_t)bus_addr);
2791
2792                 /* Setup the HW Tx Head and Tail descriptor pointers. */
2793                 E1000_WRITE_REG(hw, E1000_TDT(i), 0);
2794                 E1000_WRITE_REG(hw, E1000_TDH(i), 0);
2795
2796                 /* Setup Transmit threshold registers. */
2797                 txdctl = E1000_READ_REG(hw, E1000_TXDCTL(i));
2798                 txdctl |= txq->pthresh & 0x1F;
2799                 txdctl |= ((txq->hthresh & 0x1F) << 8);
2800                 if (hw->mac.type == e1000_82576) {
2801                         /*
2802                          * Workaround of 82576 VF Erratum
2803                          * force set WTHRESH to 1
2804                          * to avoid Write-Back not triggered sometimes
2805                          */
2806                         txdctl |= 0x10000;
2807                         PMD_INIT_LOG(DEBUG, "Force set TX WTHRESH to 1 !");
2808                 }
2809                 else
2810                         txdctl |= ((txq->wthresh & 0x1F) << 16);
2811                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2812                 E1000_WRITE_REG(hw, E1000_TXDCTL(i), txdctl);
2813         }
2814
2815 }
2816
2817 void
2818 igb_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
2819         struct rte_eth_rxq_info *qinfo)
2820 {
2821         struct igb_rx_queue *rxq;
2822
2823         rxq = dev->data->rx_queues[queue_id];
2824
2825         qinfo->mp = rxq->mb_pool;
2826         qinfo->scattered_rx = dev->data->scattered_rx;
2827         qinfo->nb_desc = rxq->nb_rx_desc;
2828
2829         qinfo->conf.rx_free_thresh = rxq->rx_free_thresh;
2830         qinfo->conf.rx_drop_en = rxq->drop_en;
2831         qinfo->conf.offloads = rxq->offloads;
2832 }
2833
2834 void
2835 igb_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
2836         struct rte_eth_txq_info *qinfo)
2837 {
2838         struct igb_tx_queue *txq;
2839
2840         txq = dev->data->tx_queues[queue_id];
2841
2842         qinfo->nb_desc = txq->nb_tx_desc;
2843
2844         qinfo->conf.tx_thresh.pthresh = txq->pthresh;
2845         qinfo->conf.tx_thresh.hthresh = txq->hthresh;
2846         qinfo->conf.tx_thresh.wthresh = txq->wthresh;
2847         qinfo->conf.offloads = txq->offloads;
2848 }
2849
2850 int
2851 igb_rss_conf_init(struct igb_rte_flow_rss_conf *out,
2852                   const struct rte_flow_action_rss *in)
2853 {
2854         if (in->key_len > RTE_DIM(out->key) ||
2855             in->queue_num > RTE_DIM(out->queue))
2856                 return -EINVAL;
2857         out->conf = (struct rte_flow_action_rss){
2858                 .func = in->func,
2859                 .level = in->level,
2860                 .types = in->types,
2861                 .key_len = in->key_len,
2862                 .queue_num = in->queue_num,
2863                 .key = memcpy(out->key, in->key, in->key_len),
2864                 .queue = memcpy(out->queue, in->queue,
2865                                 sizeof(*in->queue) * in->queue_num),
2866         };
2867         return 0;
2868 }
2869
2870 int
2871 igb_action_rss_same(const struct rte_flow_action_rss *comp,
2872                     const struct rte_flow_action_rss *with)
2873 {
2874         return (comp->func == with->func &&
2875                 comp->level == with->level &&
2876                 comp->types == with->types &&
2877                 comp->key_len == with->key_len &&
2878                 comp->queue_num == with->queue_num &&
2879                 !memcmp(comp->key, with->key, with->key_len) &&
2880                 !memcmp(comp->queue, with->queue,
2881                         sizeof(*with->queue) * with->queue_num));
2882 }
2883
2884 int
2885 igb_config_rss_filter(struct rte_eth_dev *dev,
2886                 struct igb_rte_flow_rss_conf *conf, bool add)
2887 {
2888         uint32_t shift;
2889         uint16_t i, j;
2890         struct rte_eth_rss_conf rss_conf = {
2891                 .rss_key = conf->conf.key_len ?
2892                         (void *)(uintptr_t)conf->conf.key : NULL,
2893                 .rss_key_len = conf->conf.key_len,
2894                 .rss_hf = conf->conf.types,
2895         };
2896         struct e1000_filter_info *filter_info =
2897                 E1000_DEV_PRIVATE_TO_FILTER_INFO(dev->data->dev_private);
2898         struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2899
2900         hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
2901
2902         if (!add) {
2903                 if (igb_action_rss_same(&filter_info->rss_info.conf,
2904                                         &conf->conf)) {
2905                         igb_rss_disable(dev);
2906                         memset(&filter_info->rss_info, 0,
2907                                 sizeof(struct igb_rte_flow_rss_conf));
2908                         return 0;
2909                 }
2910                 return -EINVAL;
2911         }
2912
2913         if (filter_info->rss_info.conf.queue_num)
2914                 return -EINVAL;
2915
2916         /* Fill in redirection table. */
2917         shift = (hw->mac.type == e1000_82575) ? 6 : 0;
2918         for (i = 0, j = 0; i < 128; i++, j++) {
2919                 union e1000_reta {
2920                         uint32_t dword;
2921                         uint8_t  bytes[4];
2922                 } reta;
2923                 uint8_t q_idx;
2924
2925                 if (j == conf->conf.queue_num)
2926                         j = 0;
2927                 q_idx = conf->conf.queue[j];
2928                 reta.bytes[i & 3] = (uint8_t)(q_idx << shift);
2929                 if ((i & 3) == 3)
2930                         E1000_WRITE_REG(hw, E1000_RETA(i >> 2), reta.dword);
2931         }
2932
2933         /* Configure the RSS key and the RSS protocols used to compute
2934          * the RSS hash of input packets.
2935          */
2936         if ((rss_conf.rss_hf & IGB_RSS_OFFLOAD_ALL) == 0) {
2937                 igb_rss_disable(dev);
2938                 return 0;
2939         }
2940         if (rss_conf.rss_key == NULL)
2941                 rss_conf.rss_key = rss_intel_key; /* Default hash key */
2942         igb_hw_rss_hash_set(hw, &rss_conf);
2943
2944         if (igb_rss_conf_init(&filter_info->rss_info, &conf->conf))
2945                 return -EINVAL;
2946
2947         return 0;
2948 }