drivers/net/af_xdp/rte_eth_af_xdp.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019 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 <rte_ethdev_driver.h>
  23 #include <rte_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
  41 #ifndef SOL_XDP
  42 #define SOL_XDP 283
  43 #endif
  44
  45 #ifndef AF_XDP
  46 #define AF_XDP 44
  47 #endif
  48
  49 #ifndef PF_XDP
  50 #define PF_XDP AF_XDP
  51 #endif
  52
  53 static int af_xdp_logtype;
  54
  55 #define AF_XDP_LOG(level, fmt, args...)                 \
  56         rte_log(RTE_LOG_ ## level, af_xdp_logtype,      \
  57                 "%s(): " fmt, __func__, ##args)
  58
  59 #define ETH_AF_XDP_FRAME_SIZE           2048
  60 #define ETH_AF_XDP_NUM_BUFFERS          4096
  61 #ifdef XDP_UMEM_UNALIGNED_CHUNK_FLAG
  62 #define ETH_AF_XDP_MBUF_OVERHEAD        128 /* sizeof(struct rte_mbuf) */
  63 #define ETH_AF_XDP_DATA_HEADROOM \
  64         (ETH_AF_XDP_MBUF_OVERHEAD + RTE_PKTMBUF_HEADROOM)
  65 #else
  66 #define ETH_AF_XDP_DATA_HEADROOM        0
  67 #endif
  68 #define ETH_AF_XDP_DFLT_NUM_DESCS       XSK_RING_CONS__DEFAULT_NUM_DESCS
  69 #define ETH_AF_XDP_DFLT_START_QUEUE_IDX 0
  70 #define ETH_AF_XDP_DFLT_QUEUE_COUNT     1
  71
  72 #define ETH_AF_XDP_RX_BATCH_SIZE        32
  73 #define ETH_AF_XDP_TX_BATCH_SIZE        32
  74
  75
  76 struct xsk_umem_info {
  77         struct xsk_ring_prod fq;
  78         struct xsk_ring_cons cq;
  79         struct xsk_umem *umem;
  80         struct rte_ring *buf_ring;
  81         const struct rte_memzone *mz;
  82         struct rte_mempool *mb_pool;
  83         void *buffer;
  84 };
  85
  86 struct rx_stats {
  87         uint64_t rx_pkts;
  88         uint64_t rx_bytes;
  89         uint64_t rx_dropped;
  90 };
  91
  92 struct pkt_rx_queue {
  93         struct xsk_ring_cons rx;
  94         struct xsk_umem_info *umem;
  95         struct xsk_socket *xsk;
  96         struct rte_mempool *mb_pool;
  97
  98         struct rx_stats stats;
  99
 100         struct pkt_tx_queue *pair;
 101         struct pollfd fds[1];
 102         int xsk_queue_idx;
 103 };
 104
 105 struct tx_stats {
 106         uint64_t tx_pkts;
 107         uint64_t tx_bytes;
 108         uint64_t tx_dropped;
 109 };
 110
 111 struct pkt_tx_queue {
 112         struct xsk_ring_prod tx;
 113         struct xsk_umem_info *umem;
 114
 115         struct tx_stats stats;
 116
 117         struct pkt_rx_queue *pair;
 118         int xsk_queue_idx;
 119 };
 120
 121 struct pmd_internals {
 122         int if_index;
 123         char if_name[IFNAMSIZ];
 124         int start_queue_idx;
 125         int queue_cnt;
 126         int max_queue_cnt;
 127         int combined_queue_cnt;
 128
 129         struct rte_ether_addr eth_addr;
 130
 131         struct pkt_rx_queue *rx_queues;
 132         struct pkt_tx_queue *tx_queues;
 133 };
 134
 135 #define ETH_AF_XDP_IFACE_ARG                    "iface"
 136 #define ETH_AF_XDP_START_QUEUE_ARG              "start_queue"
 137 #define ETH_AF_XDP_QUEUE_COUNT_ARG              "queue_count"
 138
 139 static const char * const valid_arguments[] = {
 140         ETH_AF_XDP_IFACE_ARG,
 141         ETH_AF_XDP_START_QUEUE_ARG,
 142         ETH_AF_XDP_QUEUE_COUNT_ARG,
 143         NULL
 144 };
 145
 146 static const struct rte_eth_link pmd_link = {
 147         .link_speed = ETH_SPEED_NUM_10G,
 148         .link_duplex = ETH_LINK_FULL_DUPLEX,
 149         .link_status = ETH_LINK_DOWN,
 150         .link_autoneg = ETH_LINK_AUTONEG
 151 };
 152
 153 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 154 static inline int
 155 reserve_fill_queue_zc(struct xsk_umem_info *umem, uint16_t reserve_size,
 156                       struct rte_mbuf **bufs)
 157 {
 158         struct xsk_ring_prod *fq = &umem->fq;
 159         uint32_t idx;
 160         uint16_t i;
 161
 162         if (unlikely(!xsk_ring_prod__reserve(fq, reserve_size, &idx))) {
 163                 for (i = 0; i < reserve_size; i++)
 164                         rte_pktmbuf_free(bufs[i]);
 165                 AF_XDP_LOG(DEBUG, "Failed to reserve enough fq descs.\n");
 166                 return -1;
 167         }
 168
 169         for (i = 0; i < reserve_size; i++) {
 170                 __u64 *fq_addr;
 171                 uint64_t addr;
 172
 173                 fq_addr = xsk_ring_prod__fill_addr(fq, idx++);
 174                 addr = (uint64_t)bufs[i] - (uint64_t)umem->buffer -
 175                                 umem->mb_pool->header_size;
 176                 *fq_addr = addr;
 177         }
 178
 179         xsk_ring_prod__submit(fq, reserve_size);
 180
 181         return 0;
 182 }
 183 #else
 184 static inline int
 185 reserve_fill_queue_cp(struct xsk_umem_info *umem, uint16_t reserve_size,
 186                       struct rte_mbuf **bufs __rte_unused)
 187 {
 188         struct xsk_ring_prod *fq = &umem->fq;
 189         void *addrs[reserve_size];
 190         uint32_t idx;
 191         uint16_t i;
 192
 193         if (rte_ring_dequeue_bulk(umem->buf_ring, addrs, reserve_size, NULL)
 194                     != reserve_size) {
 195                 AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
 196                 return -1;
 197         }
 198
 199         if (unlikely(!xsk_ring_prod__reserve(fq, reserve_size, &idx))) {
 200                 AF_XDP_LOG(DEBUG, "Failed to reserve enough fq descs.\n");
 201                 rte_ring_enqueue_bulk(umem->buf_ring, addrs,
 202                                 reserve_size, NULL);
 203                 return -1;
 204         }
 205
 206         for (i = 0; i < reserve_size; i++) {
 207                 __u64 *fq_addr;
 208
 209                 fq_addr = xsk_ring_prod__fill_addr(fq, idx++);
 210                 *fq_addr = (uint64_t)addrs[i];
 211         }
 212
 213         xsk_ring_prod__submit(fq, reserve_size);
 214
 215         return 0;
 216 }
 217 #endif
 218
 219 static inline int
 220 reserve_fill_queue(struct xsk_umem_info *umem, uint16_t reserve_size,
 221                    struct rte_mbuf **bufs)
 222 {
 223 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 224         return reserve_fill_queue_zc(umem, reserve_size, bufs);
 225 #else
 226         return reserve_fill_queue_cp(umem, reserve_size, bufs);
 227 #endif
 228 }
 229
 230 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 231 static uint16_t
 232 af_xdp_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 233 {
 234         struct pkt_rx_queue *rxq = queue;
 235         struct xsk_ring_cons *rx = &rxq->rx;
 236         struct xsk_umem_info *umem = rxq->umem;
 237         uint32_t idx_rx = 0;
 238         unsigned long rx_bytes = 0;
 239         int rcvd, i;
 240         struct rte_mbuf *fq_bufs[ETH_AF_XDP_RX_BATCH_SIZE];
 241
 242         /* allocate bufs for fill queue replenishment after rx */
 243         if (rte_pktmbuf_alloc_bulk(umem->mb_pool, fq_bufs, nb_pkts)) {
 244                 AF_XDP_LOG(DEBUG,
 245                         "Failed to get enough buffers for fq.\n");
 246                 return -1;
 247         }
 248
 249         rcvd = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
 250
 251         if (rcvd == 0) {
 252 #if defined(XDP_USE_NEED_WAKEUP)
 253                 if (xsk_ring_prod__needs_wakeup(&umem->fq))
 254                         (void)poll(rxq->fds, 1, 1000);
 255 #endif
 256
 257                 goto out;
 258         }
 259
 260         for (i = 0; i < rcvd; i++) {
 261                 const struct xdp_desc *desc;
 262                 uint64_t addr;
 263                 uint32_t len;
 264                 uint64_t offset;
 265
 266                 desc = xsk_ring_cons__rx_desc(rx, idx_rx++);
 267                 addr = desc->addr;
 268                 len = desc->len;
 269
 270                 offset = xsk_umem__extract_offset(addr);
 271                 addr = xsk_umem__extract_addr(addr);
 272
 273                 bufs[i] = (struct rte_mbuf *)
 274                                 xsk_umem__get_data(umem->buffer, addr +
 275                                         umem->mb_pool->header_size);
 276                 bufs[i]->data_off = offset - sizeof(struct rte_mbuf) -
 277                         rte_pktmbuf_priv_size(umem->mb_pool) -
 278                         umem->mb_pool->header_size;
 279
 280                 rte_pktmbuf_pkt_len(bufs[i]) = len;
 281                 rte_pktmbuf_data_len(bufs[i]) = len;
 282                 rx_bytes += len;
 283         }
 284
 285         xsk_ring_cons__release(rx, rcvd);
 286
 287         (void)reserve_fill_queue(umem, rcvd, fq_bufs);
 288
 289         /* statistics */
 290         rxq->stats.rx_pkts += rcvd;
 291         rxq->stats.rx_bytes += rx_bytes;
 292
 293 out:
 294         if (rcvd != nb_pkts)
 295                 rte_mempool_put_bulk(umem->mb_pool, (void **)&fq_bufs[rcvd],
 296                                      nb_pkts - rcvd);
 297
 298         return rcvd;
 299 }
 300 #else
 301 static uint16_t
 302 af_xdp_rx_cp(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 303 {
 304         struct pkt_rx_queue *rxq = queue;
 305         struct xsk_ring_cons *rx = &rxq->rx;
 306         struct xsk_umem_info *umem = rxq->umem;
 307         struct xsk_ring_prod *fq = &umem->fq;
 308         uint32_t idx_rx = 0;
 309         unsigned long rx_bytes = 0;
 310         int rcvd, i;
 311         uint32_t free_thresh = fq->size >> 1;
 312         struct rte_mbuf *mbufs[ETH_AF_XDP_RX_BATCH_SIZE];
 313
 314         if (unlikely(rte_pktmbuf_alloc_bulk(rxq->mb_pool, mbufs, nb_pkts) != 0))
 315                 return 0;
 316
 317         rcvd = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
 318         if (rcvd == 0) {
 319 #if defined(XDP_USE_NEED_WAKEUP)
 320                 if (xsk_ring_prod__needs_wakeup(fq))
 321                         (void)poll(rxq->fds, 1, 1000);
 322 #endif
 323
 324                 goto out;
 325         }
 326
 327         if (xsk_prod_nb_free(fq, free_thresh) >= free_thresh)
 328                 (void)reserve_fill_queue(umem, ETH_AF_XDP_RX_BATCH_SIZE, NULL);
 329
 330         for (i = 0; i < rcvd; i++) {
 331                 const struct xdp_desc *desc;
 332                 uint64_t addr;
 333                 uint32_t len;
 334                 void *pkt;
 335
 336                 desc = xsk_ring_cons__rx_desc(rx, idx_rx++);
 337                 addr = desc->addr;
 338                 len = desc->len;
 339                 pkt = xsk_umem__get_data(rxq->umem->mz->addr, addr);
 340
 341                 rte_memcpy(rte_pktmbuf_mtod(mbufs[i], void *), pkt, len);
 342                 rte_ring_enqueue(umem->buf_ring, (void *)addr);
 343                 rte_pktmbuf_pkt_len(mbufs[i]) = len;
 344                 rte_pktmbuf_data_len(mbufs[i]) = len;
 345                 rx_bytes += len;
 346                 bufs[i] = mbufs[i];
 347         }
 348
 349         xsk_ring_cons__release(rx, rcvd);
 350
 351         /* statistics */
 352         rxq->stats.rx_pkts += rcvd;
 353         rxq->stats.rx_bytes += rx_bytes;
 354
 355 out:
 356         if (rcvd != nb_pkts)
 357                 rte_mempool_put_bulk(rxq->mb_pool, (void **)&mbufs[rcvd],
 358                                      nb_pkts - rcvd);
 359
 360         return rcvd;
 361 }
 362 #endif
 363
 364 static uint16_t
 365 eth_af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 366 {
 367         nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_RX_BATCH_SIZE);
 368
 369 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 370         return af_xdp_rx_zc(queue, bufs, nb_pkts);
 371 #else
 372         return af_xdp_rx_cp(queue, bufs, nb_pkts);
 373 #endif
 374 }
 375
 376 static void
 377 pull_umem_cq(struct xsk_umem_info *umem, int size)
 378 {
 379         struct xsk_ring_cons *cq = &umem->cq;
 380         size_t i, n;
 381         uint32_t idx_cq = 0;
 382
 383         n = xsk_ring_cons__peek(cq, size, &idx_cq);
 384
 385         for (i = 0; i < n; i++) {
 386                 uint64_t addr;
 387                 addr = *xsk_ring_cons__comp_addr(cq, idx_cq++);
 388 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 389                 addr = xsk_umem__extract_addr(addr);
 390                 rte_pktmbuf_free((struct rte_mbuf *)
 391                                         xsk_umem__get_data(umem->buffer,
 392                                         addr + umem->mb_pool->header_size));
 393 #else
 394                 rte_ring_enqueue(umem->buf_ring, (void *)addr);
 395 #endif
 396         }
 397
 398         xsk_ring_cons__release(cq, n);
 399 }
 400
 401 static void
 402 kick_tx(struct pkt_tx_queue *txq)
 403 {
 404         struct xsk_umem_info *umem = txq->umem;
 405
 406 #if defined(XDP_USE_NEED_WAKEUP)
 407         if (xsk_ring_prod__needs_wakeup(&txq->tx))
 408 #endif
 409                 while (send(xsk_socket__fd(txq->pair->xsk), NULL,
 410                             0, MSG_DONTWAIT) < 0) {
 411                         /* some thing unexpected */
 412                         if (errno != EBUSY && errno != EAGAIN && errno != EINTR)
 413                                 break;
 414
 415                         /* pull from completion queue to leave more space */
 416                         if (errno == EAGAIN)
 417                                 pull_umem_cq(umem, ETH_AF_XDP_TX_BATCH_SIZE);
 418                 }
 419 #ifndef XDP_UMEM_UNALIGNED_CHUNK_FLAG
 420         pull_umem_cq(umem, ETH_AF_XDP_TX_BATCH_SIZE);
 421 #endif
 422 }
 423
 424 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 425 static uint16_t
 426 af_xdp_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 427 {
 428         struct pkt_tx_queue *txq = queue;
 429         struct xsk_umem_info *umem = txq->umem;
 430         struct rte_mbuf *mbuf;
 431         unsigned long tx_bytes = 0;
 432         int i;
 433         uint32_t idx_tx;
 434         uint16_t count = 0;
 435         struct xdp_desc *desc;
 436         uint64_t addr, offset;
 437
 438         pull_umem_cq(umem, nb_pkts);
 439
 440         for (i = 0; i < nb_pkts; i++) {
 441                 mbuf = bufs[i];
 442
 443                 if (mbuf->pool == umem->mb_pool) {
 444                         if (!xsk_ring_prod__reserve(&txq->tx, 1, &idx_tx)) {
 445                                 kick_tx(txq);
 446                                 goto out;
 447                         }
 448                         desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx);
 449                         desc->len = mbuf->pkt_len;
 450                         addr = (uint64_t)mbuf - (uint64_t)umem->buffer -
 451                                         umem->mb_pool->header_size;
 452                         offset = rte_pktmbuf_mtod(mbuf, uint64_t) -
 453                                         (uint64_t)mbuf +
 454                                         umem->mb_pool->header_size;
 455                         offset = offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT;
 456                         desc->addr = addr | offset;
 457                         count++;
 458                 } else {
 459                         struct rte_mbuf *local_mbuf =
 460                                         rte_pktmbuf_alloc(umem->mb_pool);
 461                         void *pkt;
 462
 463                         if (local_mbuf == NULL)
 464                                 goto out;
 465
 466                         if (!xsk_ring_prod__reserve(&txq->tx, 1, &idx_tx)) {
 467                                 rte_pktmbuf_free(local_mbuf);
 468                                 kick_tx(txq);
 469                                 goto out;
 470                         }
 471
 472                         desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx);
 473                         desc->len = mbuf->pkt_len;
 474
 475                         addr = (uint64_t)local_mbuf - (uint64_t)umem->buffer -
 476                                         umem->mb_pool->header_size;
 477                         offset = rte_pktmbuf_mtod(local_mbuf, uint64_t) -
 478                                         (uint64_t)local_mbuf +
 479                                         umem->mb_pool->header_size;
 480                         pkt = xsk_umem__get_data(umem->buffer, addr + offset);
 481                         offset = offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT;
 482                         desc->addr = addr | offset;
 483                         rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *),
 484                                         desc->len);
 485                         rte_pktmbuf_free(mbuf);
 486                         count++;
 487                 }
 488
 489                 tx_bytes += mbuf->pkt_len;
 490         }
 491
 492         kick_tx(txq);
 493
 494 out:
 495         xsk_ring_prod__submit(&txq->tx, count);
 496
 497         txq->stats.tx_pkts += count;
 498         txq->stats.tx_bytes += tx_bytes;
 499         txq->stats.tx_dropped += nb_pkts - count;
 500
 501         return count;
 502 }
 503 #else
 504 static uint16_t
 505 af_xdp_tx_cp(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 506 {
 507         struct pkt_tx_queue *txq = queue;
 508         struct xsk_umem_info *umem = txq->umem;
 509         struct rte_mbuf *mbuf;
 510         void *addrs[ETH_AF_XDP_TX_BATCH_SIZE];
 511         unsigned long tx_bytes = 0;
 512         int i;
 513         uint32_t idx_tx;
 514
 515         nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
 516
 517         pull_umem_cq(umem, nb_pkts);
 518
 519         nb_pkts = rte_ring_dequeue_bulk(umem->buf_ring, addrs,
 520                                         nb_pkts, NULL);
 521         if (nb_pkts == 0)
 522                 return 0;
 523
 524         if (xsk_ring_prod__reserve(&txq->tx, nb_pkts, &idx_tx) != nb_pkts) {
 525                 kick_tx(txq);
 526                 rte_ring_enqueue_bulk(umem->buf_ring, addrs, nb_pkts, NULL);
 527                 return 0;
 528         }
 529
 530         for (i = 0; i < nb_pkts; i++) {
 531                 struct xdp_desc *desc;
 532                 void *pkt;
 533
 534                 desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx + i);
 535                 mbuf = bufs[i];
 536                 desc->len = mbuf->pkt_len;
 537
 538                 desc->addr = (uint64_t)addrs[i];
 539                 pkt = xsk_umem__get_data(umem->mz->addr,
 540                                          desc->addr);
 541                 rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *), desc->len);
 542                 tx_bytes += mbuf->pkt_len;
 543                 rte_pktmbuf_free(mbuf);
 544         }
 545
 546         xsk_ring_prod__submit(&txq->tx, nb_pkts);
 547
 548         kick_tx(txq);
 549
 550         txq->stats.tx_pkts += nb_pkts;
 551         txq->stats.tx_bytes += tx_bytes;
 552
 553         return nb_pkts;
 554 }
 555 #endif
 556
 557 static uint16_t
 558 eth_af_xdp_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 559 {
 560 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 561         return af_xdp_tx_zc(queue, bufs, nb_pkts);
 562 #else
 563         return af_xdp_tx_cp(queue, bufs, nb_pkts);
 564 #endif
 565 }
 566
 567 static int
 568 eth_dev_start(struct rte_eth_dev *dev)
 569 {
 570         dev->data->dev_link.link_status = ETH_LINK_UP;
 571
 572         return 0;
 573 }
 574
 575 /* This function gets called when the current port gets stopped. */
 576 static void
 577 eth_dev_stop(struct rte_eth_dev *dev)
 578 {
 579         dev->data->dev_link.link_status = ETH_LINK_DOWN;
 580 }
 581
 582 static int
 583 eth_dev_configure(struct rte_eth_dev *dev)
 584 {
 585         /* rx/tx must be paired */
 586         if (dev->data->nb_rx_queues != dev->data->nb_tx_queues)
 587                 return -EINVAL;
 588
 589         return 0;
 590 }
 591
 592 static int
 593 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 594 {
 595         struct pmd_internals *internals = dev->data->dev_private;
 596
 597         dev_info->if_index = internals->if_index;
 598         dev_info->max_mac_addrs = 1;
 599         dev_info->max_rx_pktlen = ETH_FRAME_LEN;
 600         dev_info->max_rx_queues = internals->queue_cnt;
 601         dev_info->max_tx_queues = internals->queue_cnt;
 602
 603         dev_info->min_mtu = RTE_ETHER_MIN_MTU;
 604         dev_info->max_mtu = ETH_AF_XDP_FRAME_SIZE - ETH_AF_XDP_DATA_HEADROOM;
 605
 606         dev_info->default_rxportconf.nb_queues = 1;
 607         dev_info->default_txportconf.nb_queues = 1;
 608         dev_info->default_rxportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
 609         dev_info->default_txportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
 610
 611         return 0;
 612 }
 613
 614 static int
 615 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 616 {
 617         struct pmd_internals *internals = dev->data->dev_private;
 618         struct xdp_statistics xdp_stats;
 619         struct pkt_rx_queue *rxq;
 620         struct pkt_tx_queue *txq;
 621         socklen_t optlen;
 622         int i, ret;
 623
 624         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 625                 optlen = sizeof(struct xdp_statistics);
 626                 rxq = &internals->rx_queues[i];
 627                 txq = rxq->pair;
 628                 stats->q_ipackets[i] = rxq->stats.rx_pkts;
 629                 stats->q_ibytes[i] = rxq->stats.rx_bytes;
 630
 631                 stats->q_opackets[i] = txq->stats.tx_pkts;
 632                 stats->q_obytes[i] = txq->stats.tx_bytes;
 633
 634                 stats->ipackets += stats->q_ipackets[i];
 635                 stats->ibytes += stats->q_ibytes[i];
 636                 stats->imissed += rxq->stats.rx_dropped;
 637                 stats->oerrors += txq->stats.tx_dropped;
 638                 ret = getsockopt(xsk_socket__fd(rxq->xsk), SOL_XDP,
 639                                 XDP_STATISTICS, &xdp_stats, &optlen);
 640                 if (ret != 0) {
 641                         AF_XDP_LOG(ERR, "getsockopt() failed for XDP_STATISTICS.\n");
 642                         return -1;
 643                 }
 644                 stats->imissed += xdp_stats.rx_dropped;
 645
 646                 stats->opackets += stats->q_opackets[i];
 647                 stats->obytes += stats->q_obytes[i];
 648         }
 649
 650         return 0;
 651 }
 652
 653 static int
 654 eth_stats_reset(struct rte_eth_dev *dev)
 655 {
 656         struct pmd_internals *internals = dev->data->dev_private;
 657         int i;
 658
 659         for (i = 0; i < internals->queue_cnt; i++) {
 660                 memset(&internals->rx_queues[i].stats, 0,
 661                                         sizeof(struct rx_stats));
 662                 memset(&internals->tx_queues[i].stats, 0,
 663                                         sizeof(struct tx_stats));
 664         }
 665
 666         return 0;
 667 }
 668
 669 static void
 670 remove_xdp_program(struct pmd_internals *internals)
 671 {
 672         uint32_t curr_prog_id = 0;
 673
 674         if (bpf_get_link_xdp_id(internals->if_index, &curr_prog_id,
 675                                 XDP_FLAGS_UPDATE_IF_NOEXIST)) {
 676                 AF_XDP_LOG(ERR, "bpf_get_link_xdp_id failed\n");
 677                 return;
 678         }
 679         bpf_set_link_xdp_fd(internals->if_index, -1,
 680                         XDP_FLAGS_UPDATE_IF_NOEXIST);
 681 }
 682
 683 static void
 684 xdp_umem_destroy(struct xsk_umem_info *umem)
 685 {
 686 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 687         rte_mempool_free(umem->mb_pool);
 688         umem->mb_pool = NULL;
 689 #else
 690         rte_memzone_free(umem->mz);
 691         umem->mz = NULL;
 692
 693         rte_ring_free(umem->buf_ring);
 694         umem->buf_ring = NULL;
 695 #endif
 696
 697         rte_free(umem);
 698         umem = NULL;
 699 }
 700
 701 static void
 702 eth_dev_close(struct rte_eth_dev *dev)
 703 {
 704         struct pmd_internals *internals = dev->data->dev_private;
 705         struct pkt_rx_queue *rxq;
 706         int i;
 707
 708         AF_XDP_LOG(INFO, "Closing AF_XDP ethdev on numa socket %u\n",
 709                 rte_socket_id());
 710
 711         for (i = 0; i < internals->queue_cnt; i++) {
 712                 rxq = &internals->rx_queues[i];
 713                 if (rxq->umem == NULL)
 714                         break;
 715                 xsk_socket__delete(rxq->xsk);
 716                 (void)xsk_umem__delete(rxq->umem->umem);
 717                 xdp_umem_destroy(rxq->umem);
 718
 719                 /* free pkt_tx_queue */
 720                 rte_free(rxq->pair);
 721                 rte_free(rxq);
 722         }
 723
 724         /*
 725          * MAC is not allocated dynamically, setting it to NULL would prevent
 726          * from releasing it in rte_eth_dev_release_port.
 727          */
 728         dev->data->mac_addrs = NULL;
 729
 730         remove_xdp_program(internals);
 731 }
 732
 733 static void
 734 eth_queue_release(void *q __rte_unused)
 735 {
 736 }
 737
 738 static int
 739 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 740                 int wait_to_complete __rte_unused)
 741 {
 742         return 0;
 743 }
 744
 745 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 746 static inline uint64_t get_base_addr(struct rte_mempool *mp)
 747 {
 748         struct rte_mempool_memhdr *memhdr;
 749
 750         memhdr = STAILQ_FIRST(&mp->mem_list);
 751         return (uint64_t)memhdr->addr & ~(getpagesize() - 1);
 752 }
 753
 754 static struct
 755 xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals __rte_unused,
 756                                   struct pkt_rx_queue *rxq)
 757 {
 758         struct xsk_umem_info *umem;
 759         int ret;
 760         struct xsk_umem_config usr_config = {
 761                 .fill_size = ETH_AF_XDP_DFLT_NUM_DESCS,
 762                 .comp_size = ETH_AF_XDP_DFLT_NUM_DESCS,
 763                 .flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG};
 764         void *base_addr = NULL;
 765         struct rte_mempool *mb_pool = rxq->mb_pool;
 766
 767         usr_config.frame_size = rte_mempool_calc_obj_size(mb_pool->elt_size,
 768                                                                 mb_pool->flags,
 769                                                                 NULL);
 770         usr_config.frame_headroom = mb_pool->header_size +
 771                                         sizeof(struct rte_mbuf) +
 772                                         rte_pktmbuf_priv_size(mb_pool) +
 773                                         RTE_PKTMBUF_HEADROOM;
 774
 775         umem = rte_zmalloc_socket("umem", sizeof(*umem), 0, rte_socket_id());
 776         if (umem == NULL) {
 777                 AF_XDP_LOG(ERR, "Failed to allocate umem info");
 778                 return NULL;
 779         }
 780
 781         umem->mb_pool = mb_pool;
 782         base_addr = (void *)get_base_addr(mb_pool);
 783
 784         ret = xsk_umem__create(&umem->umem, base_addr,
 785                                mb_pool->populated_size * usr_config.frame_size,
 786                                &umem->fq, &umem->cq,
 787                                &usr_config);
 788
 789         if (ret) {
 790                 AF_XDP_LOG(ERR, "Failed to create umem");
 791                 goto err;
 792         }
 793         umem->buffer = base_addr;
 794
 795 #else
 796 static struct
 797 xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
 798                                   struct pkt_rx_queue *rxq)
 799 {
 800         struct xsk_umem_info *umem;
 801         const struct rte_memzone *mz;
 802         struct xsk_umem_config usr_config = {
 803                 .fill_size = ETH_AF_XDP_DFLT_NUM_DESCS,
 804                 .comp_size = ETH_AF_XDP_DFLT_NUM_DESCS,
 805                 .frame_size = ETH_AF_XDP_FRAME_SIZE,
 806                 .frame_headroom = ETH_AF_XDP_DATA_HEADROOM };
 807         char ring_name[RTE_RING_NAMESIZE];
 808         char mz_name[RTE_MEMZONE_NAMESIZE];
 809         int ret;
 810         uint64_t i;
 811
 812         umem = rte_zmalloc_socket("umem", sizeof(*umem), 0, rte_socket_id());
 813         if (umem == NULL) {
 814                 AF_XDP_LOG(ERR, "Failed to allocate umem info");
 815                 return NULL;
 816         }
 817
 818         snprintf(ring_name, sizeof(ring_name), "af_xdp_ring_%s_%u",
 819                        internals->if_name, rxq->xsk_queue_idx);
 820         umem->buf_ring = rte_ring_create(ring_name,
 821                                          ETH_AF_XDP_NUM_BUFFERS,
 822                                          rte_socket_id(),
 823                                          RING_F_SP_ENQ | RING_F_SC_DEQ);
 824         if (umem->buf_ring == NULL) {
 825                 AF_XDP_LOG(ERR, "Failed to create rte_ring\n");
 826                 goto err;
 827         }
 828
 829         for (i = 0; i < ETH_AF_XDP_NUM_BUFFERS; i++)
 830                 rte_ring_enqueue(umem->buf_ring,
 831                                  (void *)(i * ETH_AF_XDP_FRAME_SIZE +
 832                                           ETH_AF_XDP_DATA_HEADROOM));
 833
 834         snprintf(mz_name, sizeof(mz_name), "af_xdp_umem_%s_%u",
 835                        internals->if_name, rxq->xsk_queue_idx);
 836         mz = rte_memzone_reserve_aligned(mz_name,
 837                         ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
 838                         rte_socket_id(), RTE_MEMZONE_IOVA_CONTIG,
 839                         getpagesize());
 840         if (mz == NULL) {
 841                 AF_XDP_LOG(ERR, "Failed to reserve memzone for af_xdp umem.\n");
 842                 goto err;
 843         }
 844
 845         ret = xsk_umem__create(&umem->umem, mz->addr,
 846                                ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
 847                                &umem->fq, &umem->cq,
 848                                &usr_config);
 849
 850         if (ret) {
 851                 AF_XDP_LOG(ERR, "Failed to create umem");
 852                 goto err;
 853         }
 854         umem->mz = mz;
 855
 856 #endif
 857         return umem;
 858
 859 err:
 860         xdp_umem_destroy(umem);
 861         return NULL;
 862 }
 863
 864 static int
 865 xsk_configure(struct pmd_internals *internals, struct pkt_rx_queue *rxq,
 866               int ring_size)
 867 {
 868         struct xsk_socket_config cfg;
 869         struct pkt_tx_queue *txq = rxq->pair;
 870         int ret = 0;
 871         int reserve_size = ETH_AF_XDP_DFLT_NUM_DESCS / 2;
 872         struct rte_mbuf *fq_bufs[reserve_size];
 873
 874         rxq->umem = xdp_umem_configure(internals, rxq);
 875         if (rxq->umem == NULL)
 876                 return -ENOMEM;
 877         txq->umem = rxq->umem;
 878
 879         cfg.rx_size = ring_size;
 880         cfg.tx_size = ring_size;
 881         cfg.libbpf_flags = 0;
 882         cfg.xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
 883         cfg.bind_flags = 0;
 884
 885 #if defined(XDP_USE_NEED_WAKEUP)
 886         cfg.bind_flags |= XDP_USE_NEED_WAKEUP;
 887 #endif
 888
 889         ret = xsk_socket__create(&rxq->xsk, internals->if_name,
 890                         rxq->xsk_queue_idx, rxq->umem->umem, &rxq->rx,
 891                         &txq->tx, &cfg);
 892         if (ret) {
 893                 AF_XDP_LOG(ERR, "Failed to create xsk socket.\n");
 894                 goto err;
 895         }
 896
 897 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
 898         if (rte_pktmbuf_alloc_bulk(rxq->umem->mb_pool, fq_bufs, reserve_size)) {
 899                 AF_XDP_LOG(DEBUG, "Failed to get enough buffers for fq.\n");
 900                 goto err;
 901         }
 902 #endif
 903         ret = reserve_fill_queue(rxq->umem, reserve_size, fq_bufs);
 904         if (ret) {
 905                 xsk_socket__delete(rxq->xsk);
 906                 AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
 907                 goto err;
 908         }
 909
 910         return 0;
 911
 912 err:
 913         xdp_umem_destroy(rxq->umem);
 914
 915         return ret;
 916 }
 917
 918 static int
 919 eth_rx_queue_setup(struct rte_eth_dev *dev,
 920                    uint16_t rx_queue_id,
 921                    uint16_t nb_rx_desc,
 922                    unsigned int socket_id __rte_unused,
 923                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 924                    struct rte_mempool *mb_pool)
 925 {
 926         struct pmd_internals *internals = dev->data->dev_private;
 927         struct pkt_rx_queue *rxq;
 928         int ret;
 929
 930         rxq = &internals->rx_queues[rx_queue_id];
 931
 932         AF_XDP_LOG(INFO, "Set up rx queue, rx queue id: %d, xsk queue id: %d\n",
 933                    rx_queue_id, rxq->xsk_queue_idx);
 934
 935 #ifndef XDP_UMEM_UNALIGNED_CHUNK_FLAG
 936         uint32_t buf_size, data_size;
 937
 938         /* Now get the space available for data in the mbuf */
 939         buf_size = rte_pktmbuf_data_room_size(mb_pool) -
 940                 RTE_PKTMBUF_HEADROOM;
 941         data_size = ETH_AF_XDP_FRAME_SIZE - ETH_AF_XDP_DATA_HEADROOM;
 942
 943         if (data_size > buf_size) {
 944                 AF_XDP_LOG(ERR, "%s: %d bytes will not fit in mbuf (%d bytes)\n",
 945                         dev->device->name, data_size, buf_size);
 946                 ret = -ENOMEM;
 947                 goto err;
 948         }
 949 #endif
 950
 951         rxq->mb_pool = mb_pool;
 952
 953         if (xsk_configure(internals, rxq, nb_rx_desc)) {
 954                 AF_XDP_LOG(ERR, "Failed to configure xdp socket\n");
 955                 ret = -EINVAL;
 956                 goto err;
 957         }
 958
 959         rxq->fds[0].fd = xsk_socket__fd(rxq->xsk);
 960         rxq->fds[0].events = POLLIN;
 961
 962         dev->data->rx_queues[rx_queue_id] = rxq;
 963         return 0;
 964
 965 err:
 966         return ret;
 967 }
 968
 969 static int
 970 eth_tx_queue_setup(struct rte_eth_dev *dev,
 971                    uint16_t tx_queue_id,
 972                    uint16_t nb_tx_desc __rte_unused,
 973                    unsigned int socket_id __rte_unused,
 974                    const struct rte_eth_txconf *tx_conf __rte_unused)
 975 {
 976         struct pmd_internals *internals = dev->data->dev_private;
 977         struct pkt_tx_queue *txq;
 978
 979         txq = &internals->tx_queues[tx_queue_id];
 980
 981         dev->data->tx_queues[tx_queue_id] = txq;
 982         return 0;
 983 }
 984
 985 static int
 986 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 987 {
 988         struct pmd_internals *internals = dev->data->dev_private;
 989         struct ifreq ifr = { .ifr_mtu = mtu };
 990         int ret;
 991         int s;
 992
 993         s = socket(PF_INET, SOCK_DGRAM, 0);
 994         if (s < 0)
 995                 return -EINVAL;
 996
 997         strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
 998         ret = ioctl(s, SIOCSIFMTU, &ifr);
 999         close(s);
1000
1001         return (ret < 0) ? -errno : 0;
1002 }
1003
1004 static int
1005 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
1006 {
1007         struct ifreq ifr;
1008         int ret = 0;
1009         int s;
1010
1011         s = socket(PF_INET, SOCK_DGRAM, 0);
1012         if (s < 0)
1013                 return -errno;
1014
1015         strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
1016         if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
1017                 ret = -errno;
1018                 goto out;
1019         }
1020         ifr.ifr_flags &= mask;
1021         ifr.ifr_flags |= flags;
1022         if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
1023                 ret = -errno;
1024                 goto out;
1025         }
1026 out:
1027         close(s);
1028         return ret;
1029 }
1030
1031 static int
1032 eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
1033 {
1034         struct pmd_internals *internals = dev->data->dev_private;
1035
1036         return eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
1037 }
1038
1039 static int
1040 eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
1041 {
1042         struct pmd_internals *internals = dev->data->dev_private;
1043
1044         return eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
1045 }
1046
1047 static const struct eth_dev_ops ops = {
1048         .dev_start = eth_dev_start,
1049         .dev_stop = eth_dev_stop,
1050         .dev_close = eth_dev_close,
1051         .dev_configure = eth_dev_configure,
1052         .dev_infos_get = eth_dev_info,
1053         .mtu_set = eth_dev_mtu_set,
1054         .promiscuous_enable = eth_dev_promiscuous_enable,
1055         .promiscuous_disable = eth_dev_promiscuous_disable,
1056         .rx_queue_setup = eth_rx_queue_setup,
1057         .tx_queue_setup = eth_tx_queue_setup,
1058         .rx_queue_release = eth_queue_release,
1059         .tx_queue_release = eth_queue_release,
1060         .link_update = eth_link_update,
1061         .stats_get = eth_stats_get,
1062         .stats_reset = eth_stats_reset,
1063 };
1064
1065 /** parse integer from integer argument */
1066 static int
1067 parse_integer_arg(const char *key __rte_unused,
1068                   const char *value, void *extra_args)
1069 {
1070         int *i = (int *)extra_args;
1071         char *end;
1072
1073         *i = strtol(value, &end, 10);
1074         if (*i < 0) {
1075                 AF_XDP_LOG(ERR, "Argument has to be positive.\n");
1076                 return -EINVAL;
1077         }
1078
1079         return 0;
1080 }
1081
1082 /** parse name argument */
1083 static int
1084 parse_name_arg(const char *key __rte_unused,
1085                const char *value, void *extra_args)
1086 {
1087         char *name = extra_args;
1088
1089         if (strnlen(value, IFNAMSIZ) > IFNAMSIZ - 1) {
1090                 AF_XDP_LOG(ERR, "Invalid name %s, should be less than %u bytes.\n",
1091                            value, IFNAMSIZ);
1092                 return -EINVAL;
1093         }
1094
1095         strlcpy(name, value, IFNAMSIZ);
1096
1097         return 0;
1098 }
1099
1100 static int
1101 xdp_get_channels_info(const char *if_name, int *max_queues,
1102                                 int *combined_queues)
1103 {
1104         struct ethtool_channels channels;
1105         struct ifreq ifr;
1106         int fd, ret;
1107
1108         fd = socket(AF_INET, SOCK_DGRAM, 0);
1109         if (fd < 0)
1110                 return -1;
1111
1112         channels.cmd = ETHTOOL_GCHANNELS;
1113         ifr.ifr_data = (void *)&channels;
1114         strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
1115         ret = ioctl(fd, SIOCETHTOOL, &ifr);
1116         if (ret) {
1117                 if (errno == EOPNOTSUPP) {
1118                         ret = 0;
1119                 } else {
1120                         ret = -errno;
1121                         goto out;
1122                 }
1123         }
1124
1125         if (channels.max_combined == 0 || errno == EOPNOTSUPP) {
1126                 /* If the device says it has no channels, then all traffic
1127                  * is sent to a single stream, so max queues = 1.
1128                  */
1129                 *max_queues = 1;
1130                 *combined_queues = 1;
1131         } else {
1132                 *max_queues = channels.max_combined;
1133                 *combined_queues = channels.combined_count;
1134         }
1135
1136  out:
1137         close(fd);
1138         return ret;
1139 }
1140
1141 static int
1142 parse_parameters(struct rte_kvargs *kvlist, char *if_name, int *start_queue,
1143                         int *queue_cnt)
1144 {
1145         int ret;
1146
1147         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_IFACE_ARG,
1148                                  &parse_name_arg, if_name);
1149         if (ret < 0)
1150                 goto free_kvlist;
1151
1152         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_START_QUEUE_ARG,
1153                                  &parse_integer_arg, start_queue);
1154         if (ret < 0)
1155                 goto free_kvlist;
1156
1157         ret = rte_kvargs_process(kvlist, ETH_AF_XDP_QUEUE_COUNT_ARG,
1158                                  &parse_integer_arg, queue_cnt);
1159         if (ret < 0 || *queue_cnt <= 0) {
1160                 ret = -EINVAL;
1161                 goto free_kvlist;
1162         }
1163
1164 free_kvlist:
1165         rte_kvargs_free(kvlist);
1166         return ret;
1167 }
1168
1169 static int
1170 get_iface_info(const char *if_name,
1171                struct rte_ether_addr *eth_addr,
1172                int *if_index)
1173 {
1174         struct ifreq ifr;
1175         int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
1176
1177         if (sock < 0)
1178                 return -1;
1179
1180         strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
1181         if (ioctl(sock, SIOCGIFINDEX, &ifr))
1182                 goto error;
1183
1184         *if_index = ifr.ifr_ifindex;
1185
1186         if (ioctl(sock, SIOCGIFHWADDR, &ifr))
1187                 goto error;
1188
1189         rte_memcpy(eth_addr, ifr.ifr_hwaddr.sa_data, RTE_ETHER_ADDR_LEN);
1190
1191         close(sock);
1192         return 0;
1193
1194 error:
1195         close(sock);
1196         return -1;
1197 }
1198
1199 static struct rte_eth_dev *
1200 init_internals(struct rte_vdev_device *dev, const char *if_name,
1201                         int start_queue_idx, int queue_cnt)
1202 {
1203         const char *name = rte_vdev_device_name(dev);
1204         const unsigned int numa_node = dev->device.numa_node;
1205         struct pmd_internals *internals;
1206         struct rte_eth_dev *eth_dev;
1207         int ret;
1208         int i;
1209
1210         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
1211         if (internals == NULL)
1212                 return NULL;
1213
1214         internals->start_queue_idx = start_queue_idx;
1215         internals->queue_cnt = queue_cnt;
1216         strlcpy(internals->if_name, if_name, IFNAMSIZ);
1217
1218         if (xdp_get_channels_info(if_name, &internals->max_queue_cnt,
1219                                   &internals->combined_queue_cnt)) {
1220                 AF_XDP_LOG(ERR, "Failed to get channel info of interface: %s\n",
1221                                 if_name);
1222                 goto err_free_internals;
1223         }
1224
1225         if (queue_cnt > internals->combined_queue_cnt) {
1226                 AF_XDP_LOG(ERR, "Specified queue count %d is larger than combined queue count %d.\n",
1227                                 queue_cnt, internals->combined_queue_cnt);
1228                 goto err_free_internals;
1229         }
1230
1231         internals->rx_queues = rte_zmalloc_socket(NULL,
1232                                         sizeof(struct pkt_rx_queue) * queue_cnt,
1233                                         0, numa_node);
1234         if (internals->rx_queues == NULL) {
1235                 AF_XDP_LOG(ERR, "Failed to allocate memory for rx queues.\n");
1236                 goto err_free_internals;
1237         }
1238
1239         internals->tx_queues = rte_zmalloc_socket(NULL,
1240                                         sizeof(struct pkt_tx_queue) * queue_cnt,
1241                                         0, numa_node);
1242         if (internals->tx_queues == NULL) {
1243                 AF_XDP_LOG(ERR, "Failed to allocate memory for tx queues.\n");
1244                 goto err_free_rx;
1245         }
1246         for (i = 0; i < queue_cnt; i++) {
1247                 internals->tx_queues[i].pair = &internals->rx_queues[i];
1248                 internals->rx_queues[i].pair = &internals->tx_queues[i];
1249                 internals->rx_queues[i].xsk_queue_idx = start_queue_idx + i;
1250                 internals->tx_queues[i].xsk_queue_idx = start_queue_idx + i;
1251         }
1252
1253         ret = get_iface_info(if_name, &internals->eth_addr,
1254                              &internals->if_index);
1255         if (ret)
1256                 goto err_free_tx;
1257
1258         eth_dev = rte_eth_vdev_allocate(dev, 0);
1259         if (eth_dev == NULL)
1260                 goto err_free_tx;
1261
1262         eth_dev->data->dev_private = internals;
1263         eth_dev->data->dev_link = pmd_link;
1264         eth_dev->data->mac_addrs = &internals->eth_addr;
1265         eth_dev->dev_ops = &ops;
1266         eth_dev->rx_pkt_burst = eth_af_xdp_rx;
1267         eth_dev->tx_pkt_burst = eth_af_xdp_tx;
1268         /* Let rte_eth_dev_close() release the port resources. */
1269         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1270
1271 #if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG)
1272         AF_XDP_LOG(INFO, "Zero copy between umem and mbuf enabled.\n");
1273 #endif
1274
1275         return eth_dev;
1276
1277 err_free_tx:
1278         rte_free(internals->tx_queues);
1279 err_free_rx:
1280         rte_free(internals->rx_queues);
1281 err_free_internals:
1282         rte_free(internals);
1283         return NULL;
1284 }
1285
1286 static int
1287 rte_pmd_af_xdp_probe(struct rte_vdev_device *dev)
1288 {
1289         struct rte_kvargs *kvlist;
1290         char if_name[IFNAMSIZ] = {'\0'};
1291         int xsk_start_queue_idx = ETH_AF_XDP_DFLT_START_QUEUE_IDX;
1292         int xsk_queue_cnt = ETH_AF_XDP_DFLT_QUEUE_COUNT;
1293         struct rte_eth_dev *eth_dev = NULL;
1294         const char *name;
1295
1296         AF_XDP_LOG(INFO, "Initializing pmd_af_xdp for %s\n",
1297                 rte_vdev_device_name(dev));
1298
1299         name = rte_vdev_device_name(dev);
1300         if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1301                 strlen(rte_vdev_device_args(dev)) == 0) {
1302                 eth_dev = rte_eth_dev_attach_secondary(name);
1303                 if (eth_dev == NULL) {
1304                         AF_XDP_LOG(ERR, "Failed to probe %s\n", name);
1305                         return -EINVAL;
1306                 }
1307                 eth_dev->dev_ops = &ops;
1308                 rte_eth_dev_probing_finish(eth_dev);
1309                 return 0;
1310         }
1311
1312         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1313         if (kvlist == NULL) {
1314                 AF_XDP_LOG(ERR, "Invalid kvargs key\n");
1315                 return -EINVAL;
1316         }
1317
1318         if (dev->device.numa_node == SOCKET_ID_ANY)
1319                 dev->device.numa_node = rte_socket_id();
1320
1321         if (parse_parameters(kvlist, if_name, &xsk_start_queue_idx,
1322                              &xsk_queue_cnt) < 0) {
1323                 AF_XDP_LOG(ERR, "Invalid kvargs value\n");
1324                 return -EINVAL;
1325         }
1326
1327         if (strlen(if_name) == 0) {
1328                 AF_XDP_LOG(ERR, "Network interface must be specified\n");
1329                 return -EINVAL;
1330         }
1331
1332         eth_dev = init_internals(dev, if_name, xsk_start_queue_idx,
1333                                         xsk_queue_cnt);
1334         if (eth_dev == NULL) {
1335                 AF_XDP_LOG(ERR, "Failed to init internals\n");
1336                 return -1;
1337         }
1338
1339         rte_eth_dev_probing_finish(eth_dev);
1340
1341         return 0;
1342 }
1343
1344 static int
1345 rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
1346 {
1347         struct rte_eth_dev *eth_dev = NULL;
1348
1349         AF_XDP_LOG(INFO, "Removing AF_XDP ethdev on numa socket %u\n",
1350                 rte_socket_id());
1351
1352         if (dev == NULL)
1353                 return -1;
1354
1355         /* find the ethdev entry */
1356         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1357         if (eth_dev == NULL)
1358                 return 0;
1359
1360         eth_dev_close(eth_dev);
1361         rte_eth_dev_release_port(eth_dev);
1362
1363
1364         return 0;
1365 }
1366
1367 static struct rte_vdev_driver pmd_af_xdp_drv = {
1368         .probe = rte_pmd_af_xdp_probe,
1369         .remove = rte_pmd_af_xdp_remove,
1370 };
1371
1372 RTE_PMD_REGISTER_VDEV(net_af_xdp, pmd_af_xdp_drv);
1373 RTE_PMD_REGISTER_PARAM_STRING(net_af_xdp,
1374                               "iface=<string> "
1375                               "start_queue=<int> "
1376                               "queue_count=<int> ");
1377
1378 RTE_INIT(af_xdp_init_log)
1379 {
1380         af_xdp_logtype = rte_log_register("pmd.net.af_xdp");
1381         if (af_xdp_logtype >= 0)
1382                 rte_log_set_level(af_xdp_logtype, RTE_LOG_NOTICE);
1383 }