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