drivers/net/af_xdp/rte_eth_af_xdp.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019-2020 Intel Corporation.
   3  */
   4 #include <unistd.h>
   5 #include <errno.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <netinet/in.h>
   9 #include <net/if.h>
  10 #include <sys/socket.h>
  11 #include <sys/ioctl.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/if_xdp.h>
  14 #include <linux/if_link.h>
  15 #include <linux/ethtool.h>
  16 #include <linux/sockios.h>
  17 #include "af_xdp_deps.h"
  18 #include <bpf/xsk.h>
  19
  20 #include <rte_ethdev.h>
  21 #include <ethdev_driver.h>
  22 #include <ethdev_vdev.h>
  23 #include <rte_kvargs.h>
  24 #include <rte_bus_vdev.h>
  25 #include <rte_string_fns.h>
  26 #include <rte_branch_prediction.h>
  27 #include <rte_common.h>
  28 #include <rte_dev.h>
  29 #include <rte_eal.h>
  30 #include <rte_ether.h>
  31 #include <rte_lcore.h>
  32 #include <rte_log.h>
  33 #include <rte_memory.h>
  34 #include <rte_memzone.h>
  35 #include <rte_mempool.h>
  36 #include <rte_mbuf.h>
  37 #include <rte_malloc.h>
  38 #include <rte_ring.h>
  39 #include <rte_spinlock.h>
  40 #include <rte_power_intrinsics.h>
  41
  42 #include "compat.h"
  43
  44 #ifndef SO_PREFER_BUSY_POLL
  45 #define SO_PREFER_BUSY_POLL 69
  46 #endif
  47 #ifndef SO_BUSY_POLL_BUDGET
  48 #define SO_BUSY_POLL_BUDGET 70
  49 #endif
  50
  51
  52 #ifndef SOL_XDP
  53 #define SOL_XDP 283
  54 #endif
  55
  56 #ifndef AF_XDP
  57 #define AF_XDP 44
  58 #endif
  59
  60 #ifndef PF_XDP
  61 #define PF_XDP AF_XDP
  62 #endif
  63
  64 RTE_LOG_REGISTER_DEFAULT(af_xdp_logtype, NOTICE);
  65
  66 #define AF_XDP_LOG(level, fmt, args...)                 \
  67         rte_log(RTE_LOG_ ## level, af_xdp_logtype,      \
  68                 "%s(): " fmt, __func__, ##args)
  69
  70 #define ETH_AF_XDP_FRAME_SIZE           2048
  71 #define ETH_AF_XDP_NUM_BUFFERS          4096
  72 #define ETH_AF_XDP_DFLT_NUM_DESCS       XSK_RING_CONS__DEFAULT_NUM_DESCS
  73 #define ETH_AF_XDP_DFLT_START_QUEUE_IDX 0
  74 #define ETH_AF_XDP_DFLT_QUEUE_COUNT     1
  75 #define ETH_AF_XDP_DFLT_BUSY_BUDGET     64
  76 #define ETH_AF_XDP_DFLT_BUSY_TIMEOUT    20
  77
  78 #define ETH_AF_XDP_RX_BATCH_SIZE        XSK_RING_CONS__DEFAULT_NUM_DESCS
  79 #define ETH_AF_XDP_TX_BATCH_SIZE        XSK_RING_CONS__DEFAULT_NUM_DESCS
  80
  81
  82 struct xsk_umem_info {
  83         struct xsk_umem *umem;
  84         struct rte_ring *buf_ring;
  85         const struct rte_memzone *mz;
  86         struct rte_mempool *mb_pool;
  87         void *buffer;
  88         uint8_t refcnt;
  89         uint32_t max_xsks;
  90 };
  91
  92 struct rx_stats {
  93         uint64_t rx_pkts;
  94         uint64_t rx_bytes;
  95         uint64_t rx_dropped;
  96 };
  97
  98 struct pkt_rx_queue {
  99         struct xsk_ring_cons rx;
 100         struct xsk_umem_info *umem;
 101         struct xsk_socket *xsk;
 102         struct rte_mempool *mb_pool;
 103
 104         struct rx_stats stats;
 105
 106         struct xsk_ring_prod fq;
 107         struct xsk_ring_cons cq;
 108
 109         struct pkt_tx_queue *pair;
 110         struct pollfd fds[1];
 111         int xsk_queue_idx;
 112         int busy_budget;
 113 };
 114
 115 struct tx_stats {
 116         uint64_t tx_pkts;
 117         uint64_t tx_bytes;
 118         uint64_t tx_dropped;
 119 };
 120
 121 struct pkt_tx_queue {
 122         struct xsk_ring_prod tx;
 123         struct xsk_umem_info *umem;
 124
 125         struct tx_stats stats;
 126
 127         struct pkt_rx_queue *pair;
 128         int xsk_queue_idx;
 129 };
 130
 131 struct pmd_internals {
 132         int if_index;
 133         char if_name[IFNAMSIZ];
 134         int start_queue_idx;
 135         int queue_cnt;
 136         int max_queue_cnt;
 137         int combined_queue_cnt;
 138         bool shared_umem;
 139         char prog_path[PATH_MAX];
 140         bool custom_prog_configured;
 141
 142         struct rte_ether_addr eth_addr;
 143
 144         struct pkt_rx_queue *rx_queues;
 145         struct pkt_tx_queue *tx_queues;
 146 };
 147
 148 #define ETH_AF_XDP_IFACE_ARG                    "iface"
 149 #define ETH_AF_XDP_START_QUEUE_ARG              "start_queue"
 150 #define ETH_AF_XDP_QUEUE_COUNT_ARG              "queue_count"
 151 #define ETH_AF_XDP_SHARED_UMEM_ARG              "shared_umem"
 152 #define ETH_AF_XDP_PROG_ARG                     "xdp_prog"
 153 #define ETH_AF_XDP_BUDGET_ARG                   "busy_budget"
 154
 155 static const char * const valid_arguments[] = {
 156         ETH_AF_XDP_IFACE_ARG,
 157         ETH_AF_XDP_START_QUEUE_ARG,
 158         ETH_AF_XDP_QUEUE_COUNT_ARG,
 159         ETH_AF_XDP_SHARED_UMEM_ARG,
 160         ETH_AF_XDP_PROG_ARG,
 161         ETH_AF_XDP_BUDGET_ARG,
 162         NULL
 163 };
 164
 165 static const struct rte_eth_link pmd_link = {
 166         .link_speed = ETH_SPEED_NUM_10G,
 167         .link_duplex = ETH_LINK_FULL_DUPLEX,
 168         .link_status = ETH_LINK_DOWN,
 169         .link_autoneg = ETH_LINK_AUTONEG
 170 };
 171
 172 /* List which tracks PMDs to facilitate sharing UMEMs across them. */
 173 struct internal_list {
 174         TAILQ_ENTRY(internal_list) next;
 175         struct rte_eth_dev *eth_dev;
 176 };
 177
 178 TAILQ_HEAD(internal_list_head, internal_list);
 179 static struct internal_list_head internal_list =
 180         TAILQ_HEAD_INITIALIZER(internal_list);
 181
 182 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
 183
 184 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 185 static inline int
 186 reserve_fill_queue_zc(struct xsk_umem_info *umem, uint16_t reserve_size,
 187                       struct rte_mbuf **bufs, struct xsk_ring_prod *fq)
 188 {
 189         uint32_t idx;
 190         uint16_t i;
 191
 192         if (unlikely(!xsk_ring_prod__reserve(fq, reserve_size, &idx))) {
 193                 for (i = 0; i < reserve_size; i++)
 194                         rte_pktmbuf_free(bufs[i]);
 195                 AF_XDP_LOG(DEBUG, "Failed to reserve enough fq descs.\n");
 196                 return -1;
 197         }
 198
 199         for (i = 0; i < reserve_size; i++) {
 200                 __u64 *fq_addr;
 201                 uint64_t addr;
 202
 203                 fq_addr = xsk_ring_prod__fill_addr(fq, idx++);
 204                 addr = (uint64_t)bufs[i] - (uint64_t)umem->buffer -
 205                                 umem->mb_pool->header_size;
 206                 *fq_addr = addr;
 207         }
 208
 209         xsk_ring_prod__submit(fq, reserve_size);
 210
 211         return 0;
 212 }
 213 #else
 214 static inline int
 215 reserve_fill_queue_cp(struct xsk_umem_info *umem, uint16_t reserve_size,
 216                       struct rte_mbuf **bufs __rte_unused,
 217                       struct xsk_ring_prod *fq)
 218 {
 219         void *addrs[reserve_size];
 220         uint32_t idx;
 221         uint16_t i;
 222
 223         if (rte_ring_dequeue_bulk(umem->buf_ring, addrs, reserve_size, NULL)
 224                     != reserve_size) {
 225                 AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
 226                 return -1;
 227         }
 228
 229         if (unlikely(!xsk_ring_prod__reserve(fq, reserve_size, &idx))) {
 230                 AF_XDP_LOG(DEBUG, "Failed to reserve enough fq descs.\n");
 231                 rte_ring_enqueue_bulk(umem->buf_ring, addrs,
 232                                 reserve_size, NULL);
 233                 return -1;
 234         }
 235
 236         for (i = 0; i < reserve_size; i++) {
 237                 __u64 *fq_addr;
 238
 239                 fq_addr = xsk_ring_prod__fill_addr(fq, idx++);
 240                 *fq_addr = (uint64_t)addrs[i];
 241         }
 242
 243         xsk_ring_prod__submit(fq, reserve_size);
 244
 245         return 0;
 246 }
 247 #endif
 248
 249 static inline int
 250 reserve_fill_queue(struct xsk_umem_info *umem, uint16_t reserve_size,
 251                    struct rte_mbuf **bufs, struct xsk_ring_prod *fq)
 252 {
 253 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 254         return reserve_fill_queue_zc(umem, reserve_size, bufs, fq);
 255 #else
 256         return reserve_fill_queue_cp(umem, reserve_size, bufs, fq);
 257 #endif
 258 }
 259
 260 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 261 static uint16_t
 262 af_xdp_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 263 {
 264         struct pkt_rx_queue *rxq = queue;
 265         struct xsk_ring_cons *rx = &rxq->rx;
 266         struct xsk_ring_prod *fq = &rxq->fq;
 267         struct xsk_umem_info *umem = rxq->umem;
 268         uint32_t idx_rx = 0;
 269         unsigned long rx_bytes = 0;
 270         int i;
 271         struct rte_mbuf *fq_bufs[ETH_AF_XDP_RX_BATCH_SIZE];
 272
 273         nb_pkts = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
 274
 275         if (nb_pkts == 0) {
 276                 /* we can assume a kernel >= 5.11 is in use if busy polling is
 277                  * enabled and thus we can safely use the recvfrom() syscall
 278                  * which is only supported for AF_XDP sockets in kernels >=
 279                  * 5.11.
 280                  */
 281                 if (rxq->busy_budget) {
 282                         (void)recvfrom(xsk_socket__fd(rxq->xsk), NULL, 0,
 283                                        MSG_DONTWAIT, NULL, NULL);
 284                 } else if (xsk_ring_prod__needs_wakeup(fq)) {
 285                         (void)poll(&rxq->fds[0], 1, 1000);
 286                 }
 287
 288                 return 0;
 289         }
 290
 291         /* allocate bufs for fill queue replenishment after rx */
 292         if (rte_pktmbuf_alloc_bulk(umem->mb_pool, fq_bufs, nb_pkts)) {
 293                 AF_XDP_LOG(DEBUG,
 294                         "Failed to get enough buffers for fq.\n");
 295                 /* rollback cached_cons which is added by
 296                  * xsk_ring_cons__peek
 297                  */
 298                 rx->cached_cons -= nb_pkts;
 299                 return 0;
 300         }
 301
 302         for (i = 0; i < nb_pkts; i++) {
 303                 const struct xdp_desc *desc;
 304                 uint64_t addr;
 305                 uint32_t len;
 306                 uint64_t offset;
 307
 308                 desc = xsk_ring_cons__rx_desc(rx, idx_rx++);
 309                 addr = desc->addr;
 310                 len = desc->len;
 311
 312                 offset = xsk_umem__extract_offset(addr);
 313                 addr = xsk_umem__extract_addr(addr);
 314
 315                 bufs[i] = (struct rte_mbuf *)
 316                                 xsk_umem__get_data(umem->buffer, addr +
 317                                         umem->mb_pool->header_size);
 318                 bufs[i]->data_off = offset - sizeof(struct rte_mbuf) -
 319                         rte_pktmbuf_priv_size(umem->mb_pool) -
 320                         umem->mb_pool->header_size;
 321
 322                 rte_pktmbuf_pkt_len(bufs[i]) = len;
 323                 rte_pktmbuf_data_len(bufs[i]) = len;
 324                 rx_bytes += len;
 325         }
 326
 327         xsk_ring_cons__release(rx, nb_pkts);
 328         (void)reserve_fill_queue(umem, nb_pkts, fq_bufs, fq);
 329
 330         /* statistics */
 331         rxq->stats.rx_pkts += nb_pkts;
 332         rxq->stats.rx_bytes += rx_bytes;
 333
 334         return nb_pkts;
 335 }
 336 #else
 337 static uint16_t
 338 af_xdp_rx_cp(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 339 {
 340         struct pkt_rx_queue *rxq = queue;
 341         struct xsk_ring_cons *rx = &rxq->rx;
 342         struct xsk_umem_info *umem = rxq->umem;
 343         struct xsk_ring_prod *fq = &rxq->fq;
 344         uint32_t idx_rx = 0;
 345         unsigned long rx_bytes = 0;
 346         int i;
 347         uint32_t free_thresh = fq->size >> 1;
 348         struct rte_mbuf *mbufs[ETH_AF_XDP_RX_BATCH_SIZE];
 349
 350         if (xsk_prod_nb_free(fq, free_thresh) >= free_thresh)
 351                 (void)reserve_fill_queue(umem, nb_pkts, NULL, fq);
 352
 353         nb_pkts = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
 354         if (nb_pkts == 0) {
 355 #if defined(XDP_USE_NEED_WAKEUP)
 356                 if (xsk_ring_prod__needs_wakeup(fq))
 357                         (void)poll(rxq->fds, 1, 1000);
 358 #endif
 359                 return 0;
 360         }
 361
 362         if (unlikely(rte_pktmbuf_alloc_bulk(rxq->mb_pool, mbufs, nb_pkts))) {
 363                 /* rollback cached_cons which is added by
 364                  * xsk_ring_cons__peek
 365                  */
 366                 rx->cached_cons -= nb_pkts;
 367                 return 0;
 368         }
 369
 370         for (i = 0; i < nb_pkts; i++) {
 371                 const struct xdp_desc *desc;
 372                 uint64_t addr;
 373                 uint32_t len;
 374                 void *pkt;
 375
 376                 desc = xsk_ring_cons__rx_desc(rx, idx_rx++);
 377                 addr = desc->addr;
 378                 len = desc->len;
 379                 pkt = xsk_umem__get_data(rxq->umem->mz->addr, addr);
 380
 381                 rte_memcpy(rte_pktmbuf_mtod(mbufs[i], void *), pkt, len);
 382                 rte_ring_enqueue(umem->buf_ring, (void *)addr);
 383                 rte_pktmbuf_pkt_len(mbufs[i]) = len;
 384                 rte_pktmbuf_data_len(mbufs[i]) = len;
 385                 rx_bytes += len;
 386                 bufs[i] = mbufs[i];
 387         }
 388
 389         xsk_ring_cons__release(rx, nb_pkts);
 390
 391         /* statistics */
 392         rxq->stats.rx_pkts += nb_pkts;
 393         rxq->stats.rx_bytes += rx_bytes;
 394
 395         return nb_pkts;
 396 }
 397 #endif
 398
 399 static uint16_t
 400 af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 401 {
 402 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 403         return af_xdp_rx_zc(queue, bufs, nb_pkts);
 404 #else
 405         return af_xdp_rx_cp(queue, bufs, nb_pkts);
 406 #endif
 407 }
 408
 409 static uint16_t
 410 eth_af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 411 {
 412         uint16_t nb_rx;
 413
 414         if (likely(nb_pkts <= ETH_AF_XDP_RX_BATCH_SIZE))
 415                 return af_xdp_rx(queue, bufs, nb_pkts);
 416
 417         /* Split larger batch into smaller batches of size
 418          * ETH_AF_XDP_RX_BATCH_SIZE or less.
 419          */
 420         nb_rx = 0;
 421         while (nb_pkts) {
 422                 uint16_t ret, n;
 423
 424                 n = (uint16_t)RTE_MIN(nb_pkts, ETH_AF_XDP_RX_BATCH_SIZE);
 425                 ret = af_xdp_rx(queue, &bufs[nb_rx], n);
 426                 nb_rx = (uint16_t)(nb_rx + ret);
 427                 nb_pkts = (uint16_t)(nb_pkts - ret);
 428                 if (ret < n)
 429                         break;
 430         }
 431
 432         return nb_rx;
 433 }
 434
 435 static void
 436 pull_umem_cq(struct xsk_umem_info *umem, int size, struct xsk_ring_cons *cq)
 437 {
 438         size_t i, n;
 439         uint32_t idx_cq = 0;
 440
 441         n = xsk_ring_cons__peek(cq, size, &idx_cq);
 442
 443         for (i = 0; i < n; i++) {
 444                 uint64_t addr;
 445                 addr = *xsk_ring_cons__comp_addr(cq, idx_cq++);
 446 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 447                 addr = xsk_umem__extract_addr(addr);
 448                 rte_pktmbuf_free((struct rte_mbuf *)
 449                                         xsk_umem__get_data(umem->buffer,
 450                                         addr + umem->mb_pool->header_size));
 451 #else
 452                 rte_ring_enqueue(umem->buf_ring, (void *)addr);
 453 #endif
 454         }
 455
 456         xsk_ring_cons__release(cq, n);
 457 }
 458
 459 static void
 460 kick_tx(struct pkt_tx_queue *txq, struct xsk_ring_cons *cq)
 461 {
 462         struct xsk_umem_info *umem = txq->umem;
 463
 464         pull_umem_cq(umem, XSK_RING_CONS__DEFAULT_NUM_DESCS, cq);
 465
 466         if (tx_syscall_needed(&txq->tx))
 467                 while (send(xsk_socket__fd(txq->pair->xsk), NULL,
 468                             0, MSG_DONTWAIT) < 0) {
 469                         /* some thing unexpected */
 470                         if (errno != EBUSY && errno != EAGAIN && errno != EINTR)
 471                                 break;
 472
 473                         /* pull from completion queue to leave more space */
 474                         if (errno == EAGAIN)
 475                                 pull_umem_cq(umem,
 476                                              XSK_RING_CONS__DEFAULT_NUM_DESCS,
 477                                              cq);
 478                 }
 479 }
 480
 481 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 482 static uint16_t
 483 af_xdp_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 484 {
 485         struct pkt_tx_queue *txq = queue;
 486         struct xsk_umem_info *umem = txq->umem;
 487         struct rte_mbuf *mbuf;
 488         unsigned long tx_bytes = 0;
 489         int i;
 490         uint32_t idx_tx;
 491         uint16_t count = 0;
 492         struct xdp_desc *desc;
 493         uint64_t addr, offset;
 494         struct xsk_ring_cons *cq = &txq->pair->cq;
 495         uint32_t free_thresh = cq->size >> 1;
 496
 497         if (xsk_cons_nb_avail(cq, free_thresh) >= free_thresh)
 498                 pull_umem_cq(umem, XSK_RING_CONS__DEFAULT_NUM_DESCS, cq);
 499
 500         for (i = 0; i < nb_pkts; i++) {
 501                 mbuf = bufs[i];
 502
 503                 if (mbuf->pool == umem->mb_pool) {
 504                         if (!xsk_ring_prod__reserve(&txq->tx, 1, &idx_tx)) {
 505                                 kick_tx(txq, cq);
 506                                 if (!xsk_ring_prod__reserve(&txq->tx, 1,
 507                                                             &idx_tx))
 508                                         goto out;
 509                         }
 510                         desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx);
 511                         desc->len = mbuf->pkt_len;
 512                         addr = (uint64_t)mbuf - (uint64_t)umem->buffer -
 513                                         umem->mb_pool->header_size;
 514                         offset = rte_pktmbuf_mtod(mbuf, uint64_t) -
 515                                         (uint64_t)mbuf +
 516                                         umem->mb_pool->header_size;
 517                         offset = offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT;
 518                         desc->addr = addr | offset;
 519                         count++;
 520                 } else {
 521                         struct rte_mbuf *local_mbuf =
 522                                         rte_pktmbuf_alloc(umem->mb_pool);
 523                         void *pkt;
 524
 525                         if (local_mbuf == NULL)
 526                                 goto out;
 527
 528                         if (!xsk_ring_prod__reserve(&txq->tx, 1, &idx_tx)) {
 529                                 rte_pktmbuf_free(local_mbuf);
 530                                 kick_tx(txq, cq);
 531                                 goto out;
 532                         }
 533
 534                         desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx);
 535                         desc->len = mbuf->pkt_len;
 536
 537                         addr = (uint64_t)local_mbuf - (uint64_t)umem->buffer -
 538                                         umem->mb_pool->header_size;
 539                         offset = rte_pktmbuf_mtod(local_mbuf, uint64_t) -
 540                                         (uint64_t)local_mbuf +
 541                                         umem->mb_pool->header_size;
 542                         pkt = xsk_umem__get_data(umem->buffer, addr + offset);
 543                         offset = offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT;
 544                         desc->addr = addr | offset;
 545                         rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *),
 546                                         desc->len);
 547                         rte_pktmbuf_free(mbuf);
 548                         count++;
 549                 }
 550
 551                 tx_bytes += mbuf->pkt_len;
 552         }
 553
 554         kick_tx(txq, cq);
 555
 556 out:
 557         xsk_ring_prod__submit(&txq->tx, count);
 558
 559         txq->stats.tx_pkts += count;
 560         txq->stats.tx_bytes += tx_bytes;
 561         txq->stats.tx_dropped += nb_pkts - count;
 562
 563         return count;
 564 }
 565 #else
 566 static uint16_t
 567 af_xdp_tx_cp(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 568 {
 569         struct pkt_tx_queue *txq = queue;
 570         struct xsk_umem_info *umem = txq->umem;
 571         struct rte_mbuf *mbuf;
 572         void *addrs[ETH_AF_XDP_TX_BATCH_SIZE];
 573         unsigned long tx_bytes = 0;
 574         int i;
 575         uint32_t idx_tx;
 576         struct xsk_ring_cons *cq = &txq->pair->cq;
 577
 578         pull_umem_cq(umem, nb_pkts, cq);
 579
 580         nb_pkts = rte_ring_dequeue_bulk(umem->buf_ring, addrs,
 581                                         nb_pkts, NULL);
 582         if (nb_pkts == 0)
 583                 return 0;
 584
 585         if (xsk_ring_prod__reserve(&txq->tx, nb_pkts, &idx_tx) != nb_pkts) {
 586                 kick_tx(txq, cq);
 587                 rte_ring_enqueue_bulk(umem->buf_ring, addrs, nb_pkts, NULL);
 588                 return 0;
 589         }
 590
 591         for (i = 0; i < nb_pkts; i++) {
 592                 struct xdp_desc *desc;
 593                 void *pkt;
 594
 595                 desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx + i);
 596                 mbuf = bufs[i];
 597                 desc->len = mbuf->pkt_len;
 598
 599                 desc->addr = (uint64_t)addrs[i];
 600                 pkt = xsk_umem__get_data(umem->mz->addr,
 601                                          desc->addr);
 602                 rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *), desc->len);
 603                 tx_bytes += mbuf->pkt_len;
 604                 rte_pktmbuf_free(mbuf);
 605         }
 606
 607         xsk_ring_prod__submit(&txq->tx, nb_pkts);
 608
 609         kick_tx(txq, cq);
 610
 611         txq->stats.tx_pkts += nb_pkts;
 612         txq->stats.tx_bytes += tx_bytes;
 613
 614         return nb_pkts;
 615 }
 616
 617 static uint16_t
 618 af_xdp_tx_cp_batch(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 619 {
 620         uint16_t nb_tx;
 621
 622         if (likely(nb_pkts <= ETH_AF_XDP_TX_BATCH_SIZE))
 623                 return af_xdp_tx_cp(queue, bufs, nb_pkts);
 624
 625         nb_tx = 0;
 626         while (nb_pkts) {
 627                 uint16_t ret, n;
 628
 629                 /* Split larger batch into smaller batches of size
 630                  * ETH_AF_XDP_TX_BATCH_SIZE or less.
 631                  */
 632                 n = (uint16_t)RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
 633                 ret = af_xdp_tx_cp(queue, &bufs[nb_tx], n);
 634                 nb_tx = (uint16_t)(nb_tx + ret);
 635                 nb_pkts = (uint16_t)(nb_pkts - ret);
 636                 if (ret < n)
 637                         break;
 638         }
 639
 640         return nb_tx;
 641 }
 642 #endif
 643
 644 static uint16_t
 645 eth_af_xdp_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 646 {
 647 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 648         return af_xdp_tx_zc(queue, bufs, nb_pkts);
 649 #else
 650         return af_xdp_tx_cp_batch(queue, bufs, nb_pkts);
 651 #endif
 652 }
 653
 654 static int
 655 eth_dev_start(struct rte_eth_dev *dev)
 656 {
 657         dev->data->dev_link.link_status = ETH_LINK_UP;
 658
 659         return 0;
 660 }
 661
 662 /* This function gets called when the current port gets stopped. */
 663 static int
 664 eth_dev_stop(struct rte_eth_dev *dev)
 665 {
 666         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 667         return 0;
 668 }
 669
 670 /* Find ethdev in list */
 671 static inline struct internal_list *
 672 find_internal_resource(struct pmd_internals *port_int)
 673 {
 674         int found = 0;
 675         struct internal_list *list = NULL;
 676
 677         if (port_int == NULL)
 678                 return NULL;
 679
 680         pthread_mutex_lock(&internal_list_lock);
 681
 682         TAILQ_FOREACH(list, &internal_list, next) {
 683                 struct pmd_internals *list_int =
 684                                 list->eth_dev->data->dev_private;
 685                 if (list_int == port_int) {
 686                         found = 1;
 687                         break;
 688                 }
 689         }
 690
 691         pthread_mutex_unlock(&internal_list_lock);
 692
 693         if (!found)
 694                 return NULL;
 695
 696         return list;
 697 }
 698
 699 /* Check if the netdev,qid context already exists */
 700 static inline bool
 701 ctx_exists(struct pkt_rx_queue *rxq, const char *ifname,
 702                 struct pkt_rx_queue *list_rxq, const char *list_ifname)
 703 {
 704         bool exists = false;
 705
 706         if (rxq->xsk_queue_idx == list_rxq->xsk_queue_idx &&
 707                         !strncmp(ifname, list_ifname, IFNAMSIZ)) {
 708                 AF_XDP_LOG(ERR, "ctx %s,%i already exists, cannot share umem\n",
 709                                         ifname, rxq->xsk_queue_idx);
 710                 exists = true;
 711         }
 712
 713         return exists;
 714 }
 715
 716 /* Get a pointer to an existing UMEM which overlays the rxq's mb_pool */
 717 static inline int
 718 get_shared_umem(struct pkt_rx_queue *rxq, const char *ifname,
 719                         struct xsk_umem_info **umem)
 720 {
 721         struct internal_list *list;
 722         struct pmd_internals *internals;
 723         int i = 0, ret = 0;
 724         struct rte_mempool *mb_pool = rxq->mb_pool;
 725
 726         if (mb_pool == NULL)
 727                 return ret;
 728
 729         pthread_mutex_lock(&internal_list_lock);
 730
 731         TAILQ_FOREACH(list, &internal_list, next) {
 732                 internals = list->eth_dev->data->dev_private;
 733                 for (i = 0; i < internals->queue_cnt; i++) {
 734                         struct pkt_rx_queue *list_rxq =
 735                                                 &internals->rx_queues[i];
 736                         if (rxq == list_rxq)
 737                                 continue;
 738                         if (mb_pool == internals->rx_queues[i].mb_pool) {
 739                                 if (ctx_exists(rxq, ifname, list_rxq,
 740                                                 internals->if_name)) {
 741                                         ret = -1;
 742                                         goto out;
 743                                 }
 744                                 if (__atomic_load_n(
 745                                         &internals->rx_queues[i].umem->refcnt,
 746                                                         __ATOMIC_ACQUIRE)) {
 747                                         *umem = internals->rx_queues[i].umem;
 748                                         goto out;
 749                                 }
 750                         }
 751                 }
 752         }
 753
 754 out:
 755         pthread_mutex_unlock(&internal_list_lock);
 756
 757         return ret;
 758 }
 759
 760 static int
 761 eth_dev_configure(struct rte_eth_dev *dev)
 762 {
 763         struct pmd_internals *internal = dev->data->dev_private;
 764
 765         /* rx/tx must be paired */
 766         if (dev->data->nb_rx_queues != dev->data->nb_tx_queues)
 767                 return -EINVAL;
 768
 769         if (internal->shared_umem) {
 770                 struct internal_list *list = NULL;
 771                 const char *name = dev->device->name;
 772
 773                 /* Ensure PMD is not already inserted into the list */
 774                 list = find_internal_resource(internal);
 775                 if (list)
 776                         return 0;
 777
 778                 list = rte_zmalloc_socket(name, sizeof(*list), 0,
 779                                         dev->device->numa_node);
 780                 if (list == NULL)
 781                         return -1;
 782
 783                 list->eth_dev = dev;
 784                 pthread_mutex_lock(&internal_list_lock);
 785                 TAILQ_INSERT_TAIL(&internal_list, list, next);
 786                 pthread_mutex_unlock(&internal_list_lock);
 787         }
 788
 789         return 0;
 790 }
 791
 792 #define CLB_VAL_IDX 0
 793 static int
 794 eth_monitor_callback(const uint64_t value,
 795                 const uint64_t opaque[RTE_POWER_MONITOR_OPAQUE_SZ])
 796 {
 797         const uint64_t v = opaque[CLB_VAL_IDX];
 798         const uint64_t m = (uint32_t)~0;
 799
 800         /* if the value has changed, abort entering power optimized state */
 801         return (value & m) == v ? 0 : -1;
 802 }
 803
 804 static int
 805 eth_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc)
 806 {
 807         struct pkt_rx_queue *rxq = rx_queue;
 808         unsigned int *prod = rxq->rx.producer;
 809         const uint32_t cur_val = rxq->rx.cached_prod; /* use cached value */
 810
 811         /* watch for changes in producer ring */
 812         pmc->addr = (void *)prod;
 813
 814         /* store current value */
 815         pmc->opaque[CLB_VAL_IDX] = cur_val;
 816         pmc->fn = eth_monitor_callback;
 817
 818         /* AF_XDP producer ring index is 32-bit */
 819         pmc->size = sizeof(uint32_t);
 820
 821         return 0;
 822 }
 823
 824 static int
 825 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 826 {
 827         struct pmd_internals *internals = dev->data->dev_private;
 828
 829         dev_info->if_index = internals->if_index;
 830         dev_info->max_mac_addrs = 1;
 831         dev_info->max_rx_pktlen = ETH_FRAME_LEN;
 832         dev_info->max_rx_queues = internals->queue_cnt;
 833         dev_info->max_tx_queues = internals->queue_cnt;
 834
 835         dev_info->min_mtu = RTE_ETHER_MIN_MTU;
 836 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 837         dev_info->max_mtu = getpagesize() -
 838                                 sizeof(struct rte_mempool_objhdr) -
 839                                 sizeof(struct rte_mbuf) -
 840                                 RTE_PKTMBUF_HEADROOM - XDP_PACKET_HEADROOM;
 841 #else
 842         dev_info->max_mtu = ETH_AF_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM;
 843 #endif
 844
 845         dev_info->default_rxportconf.burst_size = ETH_AF_XDP_DFLT_BUSY_BUDGET;
 846         dev_info->default_txportconf.burst_size = ETH_AF_XDP_DFLT_BUSY_BUDGET;
 847         dev_info->default_rxportconf.nb_queues = 1;
 848         dev_info->default_txportconf.nb_queues = 1;
 849         dev_info->default_rxportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
 850         dev_info->default_txportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
 851
 852         return 0;
 853 }
 854
 855 static int
 856 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 857 {
 858         struct pmd_internals *internals = dev->data->dev_private;
 859         struct xdp_statistics xdp_stats;
 860         struct pkt_rx_queue *rxq;
 861         struct pkt_tx_queue *txq;
 862         socklen_t optlen;
 863         int i, ret;
 864
 865         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 866                 optlen = sizeof(struct xdp_statistics);
 867                 rxq = &internals->rx_queues[i];
 868                 txq = rxq->pair;
 869                 stats->q_ipackets[i] = rxq->stats.rx_pkts;
 870                 stats->q_ibytes[i] = rxq->stats.rx_bytes;
 871
 872                 stats->q_opackets[i] = txq->stats.tx_pkts;
 873                 stats->q_obytes[i] = txq->stats.tx_bytes;
 874
 875                 stats->ipackets += stats->q_ipackets[i];
 876                 stats->ibytes += stats->q_ibytes[i];
 877                 stats->imissed += rxq->stats.rx_dropped;
 878                 stats->oerrors += txq->stats.tx_dropped;
 879                 ret = getsockopt(xsk_socket__fd(rxq->xsk), SOL_XDP,
 880                                 XDP_STATISTICS, &xdp_stats, &optlen);
 881                 if (ret != 0) {
 882                         AF_XDP_LOG(ERR, "getsockopt() failed for XDP_STATISTICS.\n");
 883                         return -1;
 884                 }
 885                 stats->imissed += xdp_stats.rx_dropped;
 886
 887                 stats->opackets += stats->q_opackets[i];
 888                 stats->obytes += stats->q_obytes[i];
 889         }
 890
 891         return 0;
 892 }
 893
 894 static int
 895 eth_stats_reset(struct rte_eth_dev *dev)
 896 {
 897         struct pmd_internals *internals = dev->data->dev_private;
 898         int i;
 899
 900         for (i = 0; i < internals->queue_cnt; i++) {
 901                 memset(&internals->rx_queues[i].stats, 0,
 902                                         sizeof(struct rx_stats));
 903                 memset(&internals->tx_queues[i].stats, 0,
 904                                         sizeof(struct tx_stats));
 905         }
 906
 907         return 0;
 908 }
 909
 910 static void
 911 remove_xdp_program(struct pmd_internals *internals)
 912 {
 913         uint32_t curr_prog_id = 0;
 914
 915         if (bpf_get_link_xdp_id(internals->if_index, &curr_prog_id,
 916                                 XDP_FLAGS_UPDATE_IF_NOEXIST)) {
 917                 AF_XDP_LOG(ERR, "bpf_get_link_xdp_id failed\n");
 918                 return;
 919         }
 920         bpf_set_link_xdp_fd(internals->if_index, -1,
 921                         XDP_FLAGS_UPDATE_IF_NOEXIST);
 922 }
 923
 924 static void
 925 xdp_umem_destroy(struct xsk_umem_info *umem)
 926 {
 927 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 928         umem->mb_pool = NULL;
 929 #else
 930         rte_memzone_free(umem->mz);
 931         umem->mz = NULL;
 932
 933         rte_ring_free(umem->buf_ring);
 934         umem->buf_ring = NULL;
 935 #endif
 936
 937         rte_free(umem);
 938 }
 939
 940 static int
 941 eth_dev_close(struct rte_eth_dev *dev)
 942 {
 943         struct pmd_internals *internals = dev->data->dev_private;
 944         struct pkt_rx_queue *rxq;
 945         int i;
 946
 947         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 948                 return 0;
 949
 950         AF_XDP_LOG(INFO, "Closing AF_XDP ethdev on numa socket %u\n",
 951                 rte_socket_id());
 952
 953         for (i = 0; i < internals->queue_cnt; i++) {
 954                 rxq = &internals->rx_queues[i];
 955                 if (rxq->umem == NULL)
 956                         break;
 957                 xsk_socket__delete(rxq->xsk);
 958
 959                 if (__atomic_sub_fetch(&rxq->umem->refcnt, 1, __ATOMIC_ACQUIRE)
 960                                 == 0) {
 961                         (void)xsk_umem__delete(rxq->umem->umem);
 962                         xdp_umem_destroy(rxq->umem);
 963                 }
 964
 965                 /* free pkt_tx_queue */
 966                 rte_free(rxq->pair);
 967                 rte_free(rxq);
 968         }
 969
 970         /*
 971          * MAC is not allocated dynamically, setting it to NULL would prevent
 972          * from releasing it in rte_eth_dev_release_port.
 973          */
 974         dev->data->mac_addrs = NULL;
 975
 976         remove_xdp_program(internals);
 977
 978         if (internals->shared_umem) {
 979                 struct internal_list *list;
 980
 981                 /* Remove ethdev from list used to track and share UMEMs */
 982                 list = find_internal_resource(internals);
 983                 if (list) {
 984                         pthread_mutex_lock(&internal_list_lock);
 985                         TAILQ_REMOVE(&internal_list, list, next);
 986                         pthread_mutex_unlock(&internal_list_lock);
 987                         rte_free(list);
 988                 }
 989         }
 990
 991         return 0;
 992 }
 993
 994 static void
 995 eth_queue_release(void *q __rte_unused)
 996 {
 997 }
 998
 999 static int
1000 eth_link_update(struct rte_eth_dev *dev __rte_unused,
1001                 int wait_to_complete __rte_unused)
1002 {
1003         return 0;
1004 }
1005
1006 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
1007 static inline uintptr_t get_base_addr(struct rte_mempool *mp, uint64_t *align)
1008 {
1009         struct rte_mempool_memhdr *memhdr;
1010         uintptr_t memhdr_addr, aligned_addr;
1011
1012         memhdr = STAILQ_FIRST(&mp->mem_list);
1013         memhdr_addr = (uintptr_t)memhdr->addr;
1014         aligned_addr = memhdr_addr & ~(getpagesize() - 1);
1015         *align = memhdr_addr - aligned_addr;
1016
1017         return aligned_addr;
1018 }
1019
1020 static struct
1021 xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
1022                                   struct pkt_rx_queue *rxq)
1023 {
1024         struct xsk_umem_info *umem = NULL;
1025         int ret;
1026         struct xsk_umem_config usr_config = {
1027                 .fill_size = ETH_AF_XDP_DFLT_NUM_DESCS * 2,
1028                 .comp_size = ETH_AF_XDP_DFLT_NUM_DESCS,
1029                 .flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG};
1030         void *base_addr = NULL;
1031         struct rte_mempool *mb_pool = rxq->mb_pool;
1032         uint64_t umem_size, align = 0;
1033
1034         if (internals->shared_umem) {
1035                 if (get_shared_umem(rxq, internals->if_name, &umem) < 0)
1036                         return NULL;
1037
1038                 if (umem != NULL &&
1039                         __atomic_load_n(&umem->refcnt, __ATOMIC_ACQUIRE) <
1040                                         umem->max_xsks) {
1041                         AF_XDP_LOG(INFO, "%s,qid%i sharing UMEM\n",
1042                                         internals->if_name, rxq->xsk_queue_idx);
1043                         __atomic_fetch_add(&umem->refcnt, 1, __ATOMIC_ACQUIRE);
1044                 }
1045         }
1046
1047         if (umem == NULL) {
1048                 usr_config.frame_size =
1049                         rte_mempool_calc_obj_size(mb_pool->elt_size,
1050                                                   mb_pool->flags, NULL);
1051                 usr_config.frame_headroom = mb_pool->header_size +
1052                                                 sizeof(struct rte_mbuf) +
1053                                                 rte_pktmbuf_priv_size(mb_pool) +
1054                                                 RTE_PKTMBUF_HEADROOM;
1055
1056                 umem = rte_zmalloc_socket("umem", sizeof(*umem), 0,
1057                                           rte_socket_id());
1058                 if (umem == NULL) {
1059                         AF_XDP_LOG(ERR, "Failed to allocate umem info");
1060                         return NULL;
1061                 }
1062
1063                 umem->mb_pool = mb_pool;
1064                 base_addr = (void *)get_base_addr(mb_pool, &align);
1065                 umem_size = (uint64_t)mb_pool->populated_size *
1066                                 (uint64_t)usr_config.frame_size +
1067                                 align;
1068
1069                 ret = xsk_umem__create(&umem->umem, base_addr, umem_size,
1070                                 &rxq->fq, &rxq->cq, &usr_config);
1071                 if (ret) {
1072                         AF_XDP_LOG(ERR, "Failed to create umem");
1073                         goto err;
1074                 }
1075                 umem->buffer = base_addr;
1076
1077                 if (internals->shared_umem) {
1078                         umem->max_xsks = mb_pool->populated_size /
1079                                                 ETH_AF_XDP_NUM_BUFFERS;
1080                         AF_XDP_LOG(INFO, "Max xsks for UMEM %s: %u\n",
1081                                                 mb_pool->name, umem->max_xsks);
1082                 }
1083
1084                 __atomic_store_n(&umem->refcnt, 1, __ATOMIC_RELEASE);
1085         }
1086
1087 #else
1088 static struct
1089 xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
1090                                   struct pkt_rx_queue *rxq)
1091 {
1092         struct xsk_umem_info *umem;
1093         const struct rte_memzone *mz;
1094         struct xsk_umem_config usr_config = {
1095                 .fill_size = ETH_AF_XDP_DFLT_NUM_DESCS,
1096                 .comp_size = ETH_AF_XDP_DFLT_NUM_DESCS,
1097                 .frame_size = ETH_AF_XDP_FRAME_SIZE,
1098                 .frame_headroom = 0 };
1099         char ring_name[RTE_RING_NAMESIZE];
1100         char mz_name[RTE_MEMZONE_NAMESIZE];
1101         int ret;
1102         uint64_t i;
1103
1104         umem = rte_zmalloc_socket("umem", sizeof(*umem), 0, rte_socket_id());
1105         if (umem == NULL) {
1106                 AF_XDP_LOG(ERR, "Failed to allocate umem info");
1107                 return NULL;
1108         }
1109
1110         snprintf(ring_name, sizeof(ring_name), "af_xdp_ring_%s_%u",
1111                        internals->if_name, rxq->xsk_queue_idx);
1112         umem->buf_ring = rte_ring_create(ring_name,
1113                                          ETH_AF_XDP_NUM_BUFFERS,
1114                                          rte_socket_id(),
1115                                          0x0);
1116         if (umem->buf_ring == NULL) {
1117                 AF_XDP_LOG(ERR, "Failed to create rte_ring\n");
1118                 goto err;
1119         }
1120
1121         for (i = 0; i < ETH_AF_XDP_NUM_BUFFERS; i++)
1122                 rte_ring_enqueue(umem->buf_ring,
1123                                  (void *)(i * ETH_AF_XDP_FRAME_SIZE));
1124
1125         snprintf(mz_name, sizeof(mz_name), "af_xdp_umem_%s_%u",
1126                        internals->if_name, rxq->xsk_queue_idx);
1127         mz = rte_memzone_reserve_aligned(mz_name,
1128                         ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
1129                         rte_socket_id(), RTE_MEMZONE_IOVA_CONTIG,
1130                         getpagesize());
1131         if (mz == NULL) {
1132                 AF_XDP_LOG(ERR, "Failed to reserve memzone for af_xdp umem.\n");
1133                 goto err;
1134         }
1135
1136         ret = xsk_umem__create(&umem->umem, mz->addr,
1137                                ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
1138                                &rxq->fq, &rxq->cq,
1139                                &usr_config);
1140
1141         if (ret) {
1142                 AF_XDP_LOG(ERR, "Failed to create umem");
1143                 goto err;
1144         }
1145         umem->mz = mz;
1146
1147 #endif
1148         return umem;
1149
1150 err:
1151         xdp_umem_destroy(umem);
1152         return NULL;
1153 }
1154
1155 static int
1156 load_custom_xdp_prog(const char *prog_path, int if_index)
1157 {
1158         int ret, prog_fd = -1;
1159         struct bpf_object *obj;
1160         struct bpf_map *map;
1161
1162         ret = bpf_prog_load(prog_path, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
1163         if (ret) {
1164                 AF_XDP_LOG(ERR, "Failed to load program %s\n", prog_path);
1165                 return ret;
1166         }
1167
1168         /*
1169          * The loaded program must provision for a map of xsks, such that some
1170          * traffic can be redirected to userspace. When the xsk is created,
1171          * libbpf inserts it into the map.
1172          */
1173         map = bpf_object__find_map_by_name(obj, "xsks_map");
1174         if (!map) {
1175                 AF_XDP_LOG(ERR, "Failed to find xsks_map in %s\n", prog_path);
1176                 return -1;
1177         }
1178
1179         /* Link the program with the given network device */
1180         ret = bpf_set_link_xdp_fd(if_index, prog_fd,
1181                                         XDP_FLAGS_UPDATE_IF_NOEXIST);
1182         if (ret) {
1183                 AF_XDP_LOG(ERR, "Failed to set prog fd %d on interface\n",
1184                                 prog_fd);
1185                 return -1;
1186         }
1187
1188         AF_XDP_LOG(INFO, "Successfully loaded XDP program %s with fd %d\n",
1189                                 prog_path, prog_fd);
1190
1191         return 0;
1192 }
1193
1194 /* Detect support for busy polling through setsockopt(). */
1195 static int
1196 configure_preferred_busy_poll(struct pkt_rx_queue *rxq)
1197 {
1198         int sock_opt = 1;
1199         int fd = xsk_socket__fd(rxq->xsk);
1200         int ret = 0;
1201
1202         ret = setsockopt(fd, SOL_SOCKET, SO_PREFER_BUSY_POLL,
1203                         (void *)&sock_opt, sizeof(sock_opt));
1204         if (ret < 0) {
1205                 AF_XDP_LOG(DEBUG, "Failed to set SO_PREFER_BUSY_POLL\n");
1206                 goto err_prefer;
1207         }
1208
1209         sock_opt = ETH_AF_XDP_DFLT_BUSY_TIMEOUT;
1210         ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL, (void *)&sock_opt,
1211                         sizeof(sock_opt));
1212         if (ret < 0) {
1213                 AF_XDP_LOG(DEBUG, "Failed to set SO_BUSY_POLL\n");
1214                 goto err_timeout;
1215         }
1216
1217         sock_opt = rxq->busy_budget;
1218         ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL_BUDGET,
1219                         (void *)&sock_opt, sizeof(sock_opt));
1220         if (ret < 0) {
1221                 AF_XDP_LOG(DEBUG, "Failed to set SO_BUSY_POLL_BUDGET\n");
1222         } else {
1223                 AF_XDP_LOG(INFO, "Busy polling budget set to: %u\n",
1224                                         rxq->busy_budget);
1225                 return 0;
1226         }
1227
1228         /* setsockopt failure - attempt to restore xsk to default state and
1229          * proceed without busy polling support.
1230          */
1231         sock_opt = 0;
1232         ret = setsockopt(fd, SOL_SOCKET, SO_BUSY_POLL, (void *)&sock_opt,
1233                         sizeof(sock_opt));
1234         if (ret < 0) {
1235                 AF_XDP_LOG(ERR, "Failed to unset SO_BUSY_POLL\n");
1236                 return -1;
1237         }
1238
1239 err_timeout:
1240         sock_opt = 0;
1241         ret = setsockopt(fd, SOL_SOCKET, SO_PREFER_BUSY_POLL,
1242                         (void *)&sock_opt, sizeof(sock_opt));
1243         if (ret < 0) {
1244                 AF_XDP_LOG(ERR, "Failed to unset SO_PREFER_BUSY_POLL\n");
1245                 return -1;
1246         }
1247
1248 err_prefer:
1249         rxq->busy_budget = 0;
1250         return 0;
1251 }
1252
1253 static int
1254 xsk_configure(struct pmd_internals *internals, struct pkt_rx_queue *rxq,
1255               int ring_size)
1256 {
1257         struct xsk_socket_config cfg;
1258         struct pkt_tx_queue *txq = rxq->pair;
1259         int ret = 0;
1260         int reserve_size = ETH_AF_XDP_DFLT_NUM_DESCS;
1261         struct rte_mbuf *fq_bufs[reserve_size];
1262
1263         rxq->umem = xdp_umem_configure(internals, rxq);
1264         if (rxq->umem == NULL)
1265                 return -ENOMEM;
1266         txq->umem = rxq->umem;
1267
1268         cfg.rx_size = ring_size;
1269         cfg.tx_size = ring_size;
1270         cfg.libbpf_flags = 0;
1271         cfg.xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
1272         cfg.bind_flags = 0;
1273
1274 #if defined(XDP_USE_NEED_WAKEUP)
1275         cfg.bind_flags |= XDP_USE_NEED_WAKEUP;
1276 #endif
1277
1278         if (strnlen(internals->prog_path, PATH_MAX) &&
1279                                 !internals->custom_prog_configured) {
1280                 ret = load_custom_xdp_prog(internals->prog_path,
1281                                            internals->if_index);
1282                 if (ret) {
1283                         AF_XDP_LOG(ERR, "Failed to load custom XDP program %s\n",
1284                                         internals->prog_path);
1285                         goto err;
1286                 }
1287                 internals->custom_prog_configured = 1;
1288         }
1289
1290         if (internals->shared_umem)
1291                 ret = create_shared_socket(&rxq->xsk, internals->if_name,
1292                                 rxq->xsk_queue_idx, rxq->umem->umem, &rxq->rx,
1293                                 &txq->tx, &rxq->fq, &rxq->cq, &cfg);
1294         else
1295                 ret = xsk_socket__create(&rxq->xsk, internals->if_name,
1296                                 rxq->xsk_queue_idx, rxq->umem->umem, &rxq->rx,
1297                                 &txq->tx, &cfg);
1298
1299         if (ret) {
1300                 AF_XDP_LOG(ERR, "Failed to create xsk socket.\n");
1301                 goto err;
1302         }
1303
1304 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
1305         ret = rte_pktmbuf_alloc_bulk(rxq->umem->mb_pool, fq_bufs, reserve_size);
1306         if (ret) {
1307                 AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
1308                 goto err;
1309         }
1310 #endif
1311
1312         if (rxq->busy_budget) {
1313                 ret = configure_preferred_busy_poll(rxq);
1314                 if (ret) {
1315                         AF_XDP_LOG(ERR, "Failed configure busy polling.\n");
1316                         goto err;
1317                 }
1318         }
1319
1320         ret = reserve_fill_queue(rxq->umem, reserve_size, fq_bufs, &rxq->fq);
1321         if (ret) {
1322                 xsk_socket__delete(rxq->xsk);
1323                 AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
1324                 goto err;
1325         }
1326
1327         return 0;
1328
1329 err:
1330         if (__atomic_sub_fetch(&rxq->umem->refcnt, 1, __ATOMIC_ACQUIRE) == 0)
1331                 xdp_umem_destroy(rxq->umem);
1332
1333         return ret;
1334 }
1335
1336 static int
1337 eth_rx_queue_setup(struct rte_eth_dev *dev,
1338                    uint16_t rx_queue_id,
1339                    uint16_t nb_rx_desc,
1340                    unsigned int socket_id __rte_unused,
1341                    const struct rte_eth_rxconf *rx_conf __rte_unused,
1342                    struct rte_mempool *mb_pool)
1343 {
1344         struct pmd_internals *internals = dev->data->dev_private;
1345         struct pkt_rx_queue *rxq;
1346         int ret;
1347
1348         rxq = &internals->rx_queues[rx_queue_id];
1349
1350         AF_XDP_LOG(INFO, "Set up rx queue, rx queue id: %d, xsk queue id: %d\n",
1351                    rx_queue_id, rxq->xsk_queue_idx);
1352
1353 #ifndef XDP_UMEM_UNALIGNED_CHUNK_FLAG
1354         uint32_t buf_size, data_size;
1355
1356         /* Now get the space available for data in the mbuf */
1357         buf_size = rte_pktmbuf_data_room_size(mb_pool) -
1358                 RTE_PKTMBUF_HEADROOM;
1359         data_size = ETH_AF_XDP_FRAME_SIZE;
1360
1361         if (data_size > buf_size) {
1362                 AF_XDP_LOG(ERR, "%s: %d bytes will not fit in mbuf (%d bytes)\n",
1363                         dev->device->name, data_size, buf_size);
1364                 ret = -ENOMEM;
1365                 goto err;
1366         }
1367 #endif
1368
1369         rxq->mb_pool = mb_pool;
1370
1371         if (xsk_configure(internals, rxq, nb_rx_desc)) {
1372                 AF_XDP_LOG(ERR, "Failed to configure xdp socket\n");
1373                 ret = -EINVAL;
1374                 goto err;
1375         }
1376
1377         if (!rxq->busy_budget)
1378                 AF_XDP_LOG(DEBUG, "Preferred busy polling not enabled\n");
1379
1380         rxq->fds[0].fd = xsk_socket__fd(rxq->xsk);
1381         rxq->fds[0].events = POLLIN;
1382
1383         dev->data->rx_queues[rx_queue_id] = rxq;
1384         return 0;
1385
1386 err:
1387         return ret;
1388 }
1389
1390 static int
1391 eth_tx_queue_setup(struct rte_eth_dev *dev,
1392                    uint16_t tx_queue_id,
1393                    uint16_t nb_tx_desc __rte_unused,
1394                    unsigned int socket_id __rte_unused,
1395                    const struct rte_eth_txconf *tx_conf __rte_unused)
1396 {
1397         struct pmd_internals *internals = dev->data->dev_private;
1398         struct pkt_tx_queue *txq;
1399
1400         txq = &internals->tx_queues[tx_queue_id];
1401
1402         dev->data->tx_queues[tx_queue_id] = txq;
1403         return 0;
1404 }
1405
1406 static int
1407 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1408 {
1409         struct pmd_internals *internals = dev->data->dev_private;
1410         struct ifreq ifr = { .ifr_mtu = mtu };
1411         int ret;
1412         int s;
1413
1414         s = socket(PF_INET, SOCK_DGRAM, 0);
1415         if (s < 0)
1416                 return -EINVAL;
1417
1418         strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
1419         ret = ioctl(s, SIOCSIFMTU, &ifr);
1420         close(s);
1421
1422         return (ret < 0) ? -errno : 0;
1423 }
1424
1425 static int
1426 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
1427 {
1428         struct ifreq ifr;
1429         int ret = 0;
1430         int s;
1431
1432         s = socket(PF_INET, SOCK_DGRAM, 0);
1433         if (s < 0)
1434                 return -errno;
1435
1436         strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
1437         if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
1438                 ret = -errno;
1439                 goto out;
1440         }
1441         ifr.ifr_flags &= mask;
1442         ifr.ifr_flags |= flags;
1443         if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
1444                 ret = -errno;
1445                 goto out;
1446         }
1447 out:
1448         close(s);
1449         return ret;
1450 }
1451
1452 static int
1453 eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
1454 {
1455         struct pmd_internals *internals = dev->data->dev_private;
1456
1457         return eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
1458 }
1459
1460 static int
1461 eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
1462 {
1463         struct pmd_internals *internals = dev->data->dev_private;
1464
1465         return eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
1466 }
1467
1468 static const struct eth_dev_ops ops = {
1469         .dev_start = eth_dev_start,
1470         .dev_stop = eth_dev_stop,
1471         .dev_close = eth_dev_close,
1472         .dev_configure = eth_dev_configure,
1473         .dev_infos_get = eth_dev_info,
1474         .mtu_set = eth_dev_mtu_set,
1475         .promiscuous_enable = eth_dev_promiscuous_enable,
1476         .promiscuous_disable = eth_dev_promiscuous_disable,
1477         .rx_queue_setup = eth_rx_queue_setup,
1478         .tx_queue_setup = eth_tx_queue_setup,
1479         .rx_queue_release = eth_queue_release,
1480         .tx_queue_release = eth_queue_release,
1481         .link_update = eth_link_update,
1482         .stats_get = eth_stats_get,
1483         .stats_reset = eth_stats_reset,
1484         .get_monitor_addr = eth_get_monitor_addr,
1485 };
1486
1487 /** parse busy_budget argument */
1488 static int
1489 parse_budget_arg(const char *key __rte_unused,
1490                   const char *value, void *extra_args)
1491 {
1492         int *i = (int *)extra_args;
1493         char *end;
1494
1495         *i = strtol(value, &end, 10);
1496         if (*i < 0 || *i > UINT16_MAX) {
1497                 AF_XDP_LOG(ERR, "Invalid busy_budget %i, must be >= 0 and <= %u\n",
1498                                 *i, UINT16_MAX);
1499                 return -EINVAL;
1500         }
1501
1502         return 0;
1503 }
1504
1505 /** parse integer from integer argument */
1506 static int
1507 parse_integer_arg(const char *key __rte_unused,
1508                   const char *value, void *extra_args)
1509 {
1510         int *i = (int *)extra_args;
1511         char *end;
1512
1513         *i = strtol(value, &end, 10);
1514         if (*i < 0) {
1515                 AF_XDP_LOG(ERR, "Argument has to be positive.\n");
1516                 return -EINVAL;
1517         }
1518
1519         return 0;
1520 }
1521
1522 /** parse name argument */
1523 static int
1524 parse_name_arg(const char *key __rte_unused,
1525                const char *value, void *extra_args)
1526 {
1527         char *name = extra_args;
1528
1529         if (strnlen(value, IFNAMSIZ) > IFNAMSIZ - 1) {
1530                 AF_XDP_LOG(ERR, "Invalid name %s, should be less than %u bytes.\n",
1531                            value, IFNAMSIZ);
1532                 return -EINVAL;
1533         }
1534
1535         strlcpy(name, value, IFNAMSIZ);
1536
1537         return 0;
1538 }
1539
1540 /** parse xdp prog argument */
1541 static int
1542 parse_prog_arg(const char *key __rte_unused,
1543                const char *value, void *extra_args)
1544 {
1545         char *path = extra_args;
1546
1547         if (strnlen(value, PATH_MAX) == PATH_MAX) {
1548                 AF_XDP_LOG(ERR, "Invalid path %s, should be less than %u bytes.\n",
1549                            value, PATH_MAX);
1550                 return -EINVAL;
1551         }
1552
1553         if (access(value, F_OK) != 0) {
1554                 AF_XDP_LOG(ERR, "Error accessing %s: %s\n",
1555                            value, strerror(errno));
1556                 return -EINVAL;
1557         }
1558
1559         strlcpy(path, value, PATH_MAX);
1560
1561         return 0;
1562 }
1563
1564 static int
1565 xdp_get_channels_info(const char *if_name, int *max_queues,
1566                                 int *combined_queues)
1567 {
1568         struct ethtool_channels channels;
1569         struct ifreq ifr;
1570         int fd, ret;
1571
1572         fd = socket(AF_INET, SOCK_DGRAM, 0);
1573         if (fd < 0)
1574                 return -1;
1575
1576         channels.cmd = ETHTOOL_GCHANNELS;
1577         ifr.ifr_data = (void *)&channels;
1578         strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
1579         ret = ioctl(fd, SIOCETHTOOL, &ifr);
1580         if (ret) {
1581                 if (errno == EOPNOTSUPP) {
1582                         ret = 0;
1583                 } else {
1584                         ret = -errno;
1585                         goto out;
1586                 }
1587         }
1588
1589         if (channels.max_combined == 0 || errno == EOPNOTSUPP) {
1590                 /* If the device says it has no channels, then all traffic
1591                  * is sent to a single stream, so max queues = 1.
1592                  */
1593                 *max_queues = 1;
1594                 *combined_queues = 1;
1595         } else {
1596                 *max_queues = channels.max_combined;
1597                 *combined_queues = channels.combined_count;
1598         }
1599
1600  out:
1601         close(fd);
1602         return ret;
1603 }
1604
1605 static int
1606 parse_parameters(struct rte_kvargs *kvlist, char *if_name, int *start_queue,
1607                         int *queue_cnt, int *shared_umem, char *prog_path,
1608                         int *busy_budget)
1609 {
1610         int ret;
1611
1612         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_IFACE_ARG,
1613                                  &parse_name_arg, if_name);
1614         if (ret < 0)
1615                 goto free_kvlist;
1616
1617         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_START_QUEUE_ARG,
1618                                  &parse_integer_arg, start_queue);
1619         if (ret < 0)
1620                 goto free_kvlist;
1621
1622         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_QUEUE_COUNT_ARG,
1623                                  &parse_integer_arg, queue_cnt);
1624         if (ret < 0 || *queue_cnt <= 0) {
1625                 ret = -EINVAL;
1626                 goto free_kvlist;
1627         }
1628
1629         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_SHARED_UMEM_ARG,
1630                                 &parse_integer_arg, shared_umem);
1631         if (ret < 0)
1632                 goto free_kvlist;
1633
1634         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_PROG_ARG,
1635                                  &parse_prog_arg, prog_path);
1636         if (ret < 0)
1637                 goto free_kvlist;
1638
1639         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_BUDGET_ARG,
1640                                 &parse_budget_arg, busy_budget);
1641         if (ret < 0)
1642                 goto free_kvlist;
1643
1644 free_kvlist:
1645         rte_kvargs_free(kvlist);
1646         return ret;
1647 }
1648
1649 static int
1650 get_iface_info(const char *if_name,
1651                struct rte_ether_addr *eth_addr,
1652                int *if_index)
1653 {
1654         struct ifreq ifr;
1655         int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
1656
1657         if (sock < 0)
1658                 return -1;
1659
1660         strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
1661         if (ioctl(sock, SIOCGIFINDEX, &ifr))
1662                 goto error;
1663
1664         *if_index = ifr.ifr_ifindex;
1665
1666         if (ioctl(sock, SIOCGIFHWADDR, &ifr))
1667                 goto error;
1668
1669         rte_memcpy(eth_addr, ifr.ifr_hwaddr.sa_data, RTE_ETHER_ADDR_LEN);
1670
1671         close(sock);
1672         return 0;
1673
1674 error:
1675         close(sock);
1676         return -1;
1677 }
1678
1679 static struct rte_eth_dev *
1680 init_internals(struct rte_vdev_device *dev, const char *if_name,
1681                 int start_queue_idx, int queue_cnt, int shared_umem,
1682                 const char *prog_path, int busy_budget)
1683 {
1684         const char *name = rte_vdev_device_name(dev);
1685         const unsigned int numa_node = dev->device.numa_node;
1686         struct pmd_internals *internals;
1687         struct rte_eth_dev *eth_dev;
1688         int ret;
1689         int i;
1690
1691         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
1692         if (internals == NULL)
1693                 return NULL;
1694
1695         internals->start_queue_idx = start_queue_idx;
1696         internals->queue_cnt = queue_cnt;
1697         strlcpy(internals->if_name, if_name, IFNAMSIZ);
1698         strlcpy(internals->prog_path, prog_path, PATH_MAX);
1699         internals->custom_prog_configured = 0;
1700
1701 #ifndef ETH_AF_XDP_SHARED_UMEM
1702         if (shared_umem) {
1703                 AF_XDP_LOG(ERR, "Shared UMEM feature not available. "
1704                                 "Check kernel and libbpf version\n");
1705                 goto err_free_internals;
1706         }
1707 #endif
1708         internals->shared_umem = shared_umem;
1709
1710         if (xdp_get_channels_info(if_name, &internals->max_queue_cnt,
1711                                   &internals->combined_queue_cnt)) {
1712                 AF_XDP_LOG(ERR, "Failed to get channel info of interface: %s\n",
1713                                 if_name);
1714                 goto err_free_internals;
1715         }
1716
1717         if (queue_cnt > internals->combined_queue_cnt) {
1718                 AF_XDP_LOG(ERR, "Specified queue count %d is larger than combined queue count %d.\n",
1719                                 queue_cnt, internals->combined_queue_cnt);
1720                 goto err_free_internals;
1721         }
1722
1723         internals->rx_queues = rte_zmalloc_socket(NULL,
1724                                         sizeof(struct pkt_rx_queue) * queue_cnt,
1725                                         0, numa_node);
1726         if (internals->rx_queues == NULL) {
1727                 AF_XDP_LOG(ERR, "Failed to allocate memory for rx queues.\n");
1728                 goto err_free_internals;
1729         }
1730
1731         internals->tx_queues = rte_zmalloc_socket(NULL,
1732                                         sizeof(struct pkt_tx_queue) * queue_cnt,
1733                                         0, numa_node);
1734         if (internals->tx_queues == NULL) {
1735                 AF_XDP_LOG(ERR, "Failed to allocate memory for tx queues.\n");
1736                 goto err_free_rx;
1737         }
1738         for (i = 0; i < queue_cnt; i++) {
1739                 internals->tx_queues[i].pair = &internals->rx_queues[i];
1740                 internals->rx_queues[i].pair = &internals->tx_queues[i];
1741                 internals->rx_queues[i].xsk_queue_idx = start_queue_idx + i;
1742                 internals->tx_queues[i].xsk_queue_idx = start_queue_idx + i;
1743                 internals->rx_queues[i].busy_budget = busy_budget;
1744         }
1745
1746         ret = get_iface_info(if_name, &internals->eth_addr,
1747                              &internals->if_index);
1748         if (ret)
1749                 goto err_free_tx;
1750
1751         eth_dev = rte_eth_vdev_allocate(dev, 0);
1752         if (eth_dev == NULL)
1753                 goto err_free_tx;
1754
1755         eth_dev->data->dev_private = internals;
1756         eth_dev->data->dev_link = pmd_link;
1757         eth_dev->data->mac_addrs = &internals->eth_addr;
1758         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1759         eth_dev->dev_ops = &ops;
1760         eth_dev->rx_pkt_burst = eth_af_xdp_rx;
1761         eth_dev->tx_pkt_burst = eth_af_xdp_tx;
1762
1763 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
1764         AF_XDP_LOG(INFO, "Zero copy between umem and mbuf enabled.\n");
1765 #endif
1766
1767         return eth_dev;
1768
1769 err_free_tx:
1770         rte_free(internals->tx_queues);
1771 err_free_rx:
1772         rte_free(internals->rx_queues);
1773 err_free_internals:
1774         rte_free(internals);
1775         return NULL;
1776 }
1777
1778 static int
1779 rte_pmd_af_xdp_probe(struct rte_vdev_device *dev)
1780 {
1781         struct rte_kvargs *kvlist;
1782         char if_name[IFNAMSIZ] = {'\0'};
1783         int xsk_start_queue_idx = ETH_AF_XDP_DFLT_START_QUEUE_IDX;
1784         int xsk_queue_cnt = ETH_AF_XDP_DFLT_QUEUE_COUNT;
1785         int shared_umem = 0;
1786         char prog_path[PATH_MAX] = {'\0'};
1787         int busy_budget = -1;
1788         struct rte_eth_dev *eth_dev = NULL;
1789         const char *name;
1790
1791         AF_XDP_LOG(INFO, "Initializing pmd_af_xdp for %s\n",
1792                 rte_vdev_device_name(dev));
1793
1794         name = rte_vdev_device_name(dev);
1795         if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1796                 strlen(rte_vdev_device_args(dev)) == 0) {
1797                 eth_dev = rte_eth_dev_attach_secondary(name);
1798                 if (eth_dev == NULL) {
1799                         AF_XDP_LOG(ERR, "Failed to probe %s\n", name);
1800                         return -EINVAL;
1801                 }
1802                 eth_dev->dev_ops = &ops;
1803                 rte_eth_dev_probing_finish(eth_dev);
1804                 return 0;
1805         }
1806
1807         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1808         if (kvlist == NULL) {
1809                 AF_XDP_LOG(ERR, "Invalid kvargs key\n");
1810                 return -EINVAL;
1811         }
1812
1813         if (dev->device.numa_node == SOCKET_ID_ANY)
1814                 dev->device.numa_node = rte_socket_id();
1815
1816         if (parse_parameters(kvlist, if_name, &xsk_start_queue_idx,
1817                              &xsk_queue_cnt, &shared_umem, prog_path,
1818                              &busy_budget) < 0) {
1819                 AF_XDP_LOG(ERR, "Invalid kvargs value\n");
1820                 return -EINVAL;
1821         }
1822
1823         if (strlen(if_name) == 0) {
1824                 AF_XDP_LOG(ERR, "Network interface must be specified\n");
1825                 return -EINVAL;
1826         }
1827
1828         busy_budget = busy_budget == -1 ? ETH_AF_XDP_DFLT_BUSY_BUDGET :
1829                                         busy_budget;
1830
1831         eth_dev = init_internals(dev, if_name, xsk_start_queue_idx,
1832                                         xsk_queue_cnt, shared_umem, prog_path,
1833                                         busy_budget);
1834         if (eth_dev == NULL) {
1835                 AF_XDP_LOG(ERR, "Failed to init internals\n");
1836                 return -1;
1837         }
1838
1839         rte_eth_dev_probing_finish(eth_dev);
1840
1841         return 0;
1842 }
1843
1844 static int
1845 rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
1846 {
1847         struct rte_eth_dev *eth_dev = NULL;
1848
1849         AF_XDP_LOG(INFO, "Removing AF_XDP ethdev on numa socket %u\n",
1850                 rte_socket_id());
1851
1852         if (dev == NULL)
1853                 return -1;
1854
1855         /* find the ethdev entry */
1856         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1857         if (eth_dev == NULL)
1858                 return 0;
1859
1860         eth_dev_close(eth_dev);
1861         rte_eth_dev_release_port(eth_dev);
1862
1863
1864         return 0;
1865 }
1866
1867 static struct rte_vdev_driver pmd_af_xdp_drv = {
1868         .probe = rte_pmd_af_xdp_probe,
1869         .remove = rte_pmd_af_xdp_remove,
1870 };
1871
1872 RTE_PMD_REGISTER_VDEV(net_af_xdp, pmd_af_xdp_drv);
1873 RTE_PMD_REGISTER_PARAM_STRING(net_af_xdp,
1874                               "iface=<string> "
1875                               "start_queue=<int> "
1876                               "queue_count=<int> "
1877                               "shared_umem=<int> "
1878                               "xdp_prog=<string> "
1879                               "busy_budget=<int>");