/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2014 John W. Linville * Originally based upon librte_pmd_pcap code: * Copyright(c) 2010-2015 Intel Corporation. * Copyright(c) 2014 6WIND S.A. * All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ETH_AF_PACKET_IFACE_ARG "iface" #define ETH_AF_PACKET_NUM_Q_ARG "qpairs" #define ETH_AF_PACKET_BLOCKSIZE_ARG "blocksz" #define ETH_AF_PACKET_FRAMESIZE_ARG "framesz" #define ETH_AF_PACKET_FRAMECOUNT_ARG "framecnt" #define ETH_AF_PACKET_QDISC_BYPASS_ARG "qdisc_bypass" #define DFLT_BLOCK_SIZE (1 << 12) #define DFLT_FRAME_SIZE (1 << 11) #define DFLT_FRAME_COUNT (1 << 9) #define RTE_PMD_AF_PACKET_MAX_RINGS 16 struct pkt_rx_queue { int sockfd; struct iovec *rd; uint8_t *map; unsigned int framecount; unsigned int framenum; struct rte_mempool *mb_pool; uint16_t in_port; volatile unsigned long rx_pkts; volatile unsigned long err_pkts; volatile unsigned long rx_bytes; }; struct pkt_tx_queue { int sockfd; unsigned int frame_data_size; struct iovec *rd; uint8_t *map; unsigned int framecount; unsigned int framenum; volatile unsigned long tx_pkts; volatile unsigned long err_pkts; volatile unsigned long tx_bytes; }; struct pmd_internals { unsigned nb_queues; int if_index; char *if_name; struct ether_addr eth_addr; struct tpacket_req req; struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS]; struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS]; }; static const char *valid_arguments[] = { ETH_AF_PACKET_IFACE_ARG, ETH_AF_PACKET_NUM_Q_ARG, ETH_AF_PACKET_BLOCKSIZE_ARG, ETH_AF_PACKET_FRAMESIZE_ARG, ETH_AF_PACKET_FRAMECOUNT_ARG, ETH_AF_PACKET_QDISC_BYPASS_ARG, NULL }; static struct rte_eth_link pmd_link = { .link_speed = ETH_SPEED_NUM_10G, .link_duplex = ETH_LINK_FULL_DUPLEX, .link_status = ETH_LINK_DOWN, .link_autoneg = ETH_LINK_FIXED, }; static int af_packet_logtype; #define PMD_LOG(level, fmt, args...) \ rte_log(RTE_LOG_ ## level, af_packet_logtype, \ "%s(): " fmt "\n", __func__, ##args) static uint16_t eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) { unsigned i; struct tpacket2_hdr *ppd; struct rte_mbuf *mbuf; uint8_t *pbuf; struct pkt_rx_queue *pkt_q = queue; uint16_t num_rx = 0; unsigned long num_rx_bytes = 0; unsigned int framecount, framenum; if (unlikely(nb_pkts == 0)) return 0; /* * Reads the given number of packets from the AF_PACKET socket one by * one and copies the packet data into a newly allocated mbuf. */ framecount = pkt_q->framecount; framenum = pkt_q->framenum; for (i = 0; i < nb_pkts; i++) { /* point at the next incoming frame */ ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; if ((ppd->tp_status & TP_STATUS_USER) == 0) break; /* allocate the next mbuf */ mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool); if (unlikely(mbuf == NULL)) break; /* packet will fit in the mbuf, go ahead and receive it */ rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen; pbuf = (uint8_t *) ppd + ppd->tp_mac; memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf)); /* check for vlan info */ if (ppd->tp_status & TP_STATUS_VLAN_VALID) { mbuf->vlan_tci = ppd->tp_vlan_tci; mbuf->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED); } /* release incoming frame and advance ring buffer */ ppd->tp_status = TP_STATUS_KERNEL; if (++framenum >= framecount) framenum = 0; mbuf->port = pkt_q->in_port; /* account for the receive frame */ bufs[i] = mbuf; num_rx++; num_rx_bytes += mbuf->pkt_len; } pkt_q->framenum = framenum; pkt_q->rx_pkts += num_rx; pkt_q->rx_bytes += num_rx_bytes; return num_rx; } /* * Callback to handle sending packets through a real NIC. */ static uint16_t eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) { struct tpacket2_hdr *ppd; struct rte_mbuf *mbuf; uint8_t *pbuf; unsigned int framecount, framenum; struct pollfd pfd; struct pkt_tx_queue *pkt_q = queue; uint16_t num_tx = 0; unsigned long num_tx_bytes = 0; int i; if (unlikely(nb_pkts == 0)) return 0; memset(&pfd, 0, sizeof(pfd)); pfd.fd = pkt_q->sockfd; pfd.events = POLLOUT; pfd.revents = 0; framecount = pkt_q->framecount; framenum = pkt_q->framenum; ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; for (i = 0; i < nb_pkts; i++) { mbuf = *bufs++; /* drop oversized packets */ if (mbuf->pkt_len > pkt_q->frame_data_size) { rte_pktmbuf_free(mbuf); continue; } /* insert vlan info if necessary */ if (mbuf->ol_flags & PKT_TX_VLAN_PKT) { if (rte_vlan_insert(&mbuf)) { rte_pktmbuf_free(mbuf); continue; } } /* point at the next incoming frame */ if ((ppd->tp_status != TP_STATUS_AVAILABLE) && (poll(&pfd, 1, -1) < 0)) break; /* copy the tx frame data */ pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); struct rte_mbuf *tmp_mbuf = mbuf; while (tmp_mbuf) { uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf); memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len); pbuf += data_len; tmp_mbuf = tmp_mbuf->next; } ppd->tp_len = mbuf->pkt_len; ppd->tp_snaplen = mbuf->pkt_len; /* release incoming frame and advance ring buffer */ ppd->tp_status = TP_STATUS_SEND_REQUEST; if (++framenum >= framecount) framenum = 0; ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base; num_tx++; num_tx_bytes += mbuf->pkt_len; rte_pktmbuf_free(mbuf); } /* kick-off transmits */ if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1) { /* error sending -- no packets transmitted */ num_tx = 0; num_tx_bytes = 0; } pkt_q->framenum = framenum; pkt_q->tx_pkts += num_tx; pkt_q->err_pkts += i - num_tx; pkt_q->tx_bytes += num_tx_bytes; return i; } static int eth_dev_start(struct rte_eth_dev *dev) { dev->data->dev_link.link_status = ETH_LINK_UP; return 0; } /* * This function gets called when the current port gets stopped. */ static void eth_dev_stop(struct rte_eth_dev *dev) { unsigned i; int sockfd; struct pmd_internals *internals = dev->data->dev_private; for (i = 0; i < internals->nb_queues; i++) { sockfd = internals->rx_queue[i].sockfd; if (sockfd != -1) close(sockfd); /* Prevent use after free in case tx fd == rx fd */ if (sockfd != internals->tx_queue[i].sockfd) { sockfd = internals->tx_queue[i].sockfd; if (sockfd != -1) close(sockfd); } internals->rx_queue[i].sockfd = -1; internals->tx_queue[i].sockfd = -1; } dev->data->dev_link.link_status = ETH_LINK_DOWN; } static int eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; } static void eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) { struct pmd_internals *internals = dev->data->dev_private; dev_info->if_index = internals->if_index; dev_info->max_mac_addrs = 1; dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN; dev_info->max_rx_queues = (uint16_t)internals->nb_queues; dev_info->max_tx_queues = (uint16_t)internals->nb_queues; dev_info->min_rx_bufsize = 0; } static int eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats) { unsigned i, imax; unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0; unsigned long rx_bytes_total = 0, tx_bytes_total = 0; const struct pmd_internals *internal = dev->data->dev_private; imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ? internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS); for (i = 0; i < imax; i++) { igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts; igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes; rx_total += igb_stats->q_ipackets[i]; rx_bytes_total += igb_stats->q_ibytes[i]; } imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ? internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS); for (i = 0; i < imax; i++) { igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts; igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts; igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes; tx_total += igb_stats->q_opackets[i]; tx_err_total += igb_stats->q_errors[i]; tx_bytes_total += igb_stats->q_obytes[i]; } igb_stats->ipackets = rx_total; igb_stats->ibytes = rx_bytes_total; igb_stats->opackets = tx_total; igb_stats->oerrors = tx_err_total; igb_stats->obytes = tx_bytes_total; return 0; } static void eth_stats_reset(struct rte_eth_dev *dev) { unsigned i; struct pmd_internals *internal = dev->data->dev_private; for (i = 0; i < internal->nb_queues; i++) { internal->rx_queue[i].rx_pkts = 0; internal->rx_queue[i].rx_bytes = 0; } for (i = 0; i < internal->nb_queues; i++) { internal->tx_queue[i].tx_pkts = 0; internal->tx_queue[i].err_pkts = 0; internal->tx_queue[i].tx_bytes = 0; } } static void eth_dev_close(struct rte_eth_dev *dev __rte_unused) { } static void eth_queue_release(void *q __rte_unused) { } static int eth_link_update(struct rte_eth_dev *dev __rte_unused, int wait_to_complete __rte_unused) { return 0; } static int eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id, uint16_t nb_rx_desc __rte_unused, unsigned int socket_id __rte_unused, const struct rte_eth_rxconf *rx_conf __rte_unused, struct rte_mempool *mb_pool) { struct pmd_internals *internals = dev->data->dev_private; struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id]; unsigned int buf_size, data_size; pkt_q->mb_pool = mb_pool; /* Now get the space available for data in the mbuf */ buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) - RTE_PKTMBUF_HEADROOM; data_size = internals->req.tp_frame_size; data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); if (data_size > buf_size) { PMD_LOG(ERR, "%s: %d bytes will not fit in mbuf (%d bytes)", dev->device->name, data_size, buf_size); return -ENOMEM; } dev->data->rx_queues[rx_queue_id] = pkt_q; pkt_q->in_port = dev->data->port_id; return 0; } static int eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id, uint16_t nb_tx_desc __rte_unused, unsigned int socket_id __rte_unused, const struct rte_eth_txconf *tx_conf __rte_unused) { struct pmd_internals *internals = dev->data->dev_private; dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id]; return 0; } static int eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) { struct pmd_internals *internals = dev->data->dev_private; struct ifreq ifr = { .ifr_mtu = mtu }; int ret; int s; unsigned int data_size = internals->req.tp_frame_size - TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); if (mtu > data_size) return -EINVAL; s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) return -EINVAL; snprintf(ifr.ifr_name, IFNAMSIZ, "%s", internals->if_name); ret = ioctl(s, SIOCSIFMTU, &ifr); close(s); if (ret < 0) return -EINVAL; return 0; } static void eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask) { struct ifreq ifr; int s; s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) return; snprintf(ifr.ifr_name, IFNAMSIZ, "%s", if_name); if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) goto out; ifr.ifr_flags &= mask; ifr.ifr_flags |= flags; if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) goto out; out: close(s); } static void eth_dev_promiscuous_enable(struct rte_eth_dev *dev) { struct pmd_internals *internals = dev->data->dev_private; eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0); } static void eth_dev_promiscuous_disable(struct rte_eth_dev *dev) { struct pmd_internals *internals = dev->data->dev_private; eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC); } static const struct eth_dev_ops ops = { .dev_start = eth_dev_start, .dev_stop = eth_dev_stop, .dev_close = eth_dev_close, .dev_configure = eth_dev_configure, .dev_infos_get = eth_dev_info, .mtu_set = eth_dev_mtu_set, .promiscuous_enable = eth_dev_promiscuous_enable, .promiscuous_disable = eth_dev_promiscuous_disable, .rx_queue_setup = eth_rx_queue_setup, .tx_queue_setup = eth_tx_queue_setup, .rx_queue_release = eth_queue_release, .tx_queue_release = eth_queue_release, .link_update = eth_link_update, .stats_get = eth_stats_get, .stats_reset = eth_stats_reset, }; /* * Opens an AF_PACKET socket */ static int open_packet_iface(const char *key __rte_unused, const char *value __rte_unused, void *extra_args) { int *sockfd = extra_args; /* Open an AF_PACKET socket... */ *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if (*sockfd == -1) { PMD_LOG(ERR, "Could not open AF_PACKET socket"); return -1; } return 0; } static struct rte_vdev_driver pmd_af_packet_drv; static int rte_pmd_init_internals(struct rte_vdev_device *dev, const int sockfd, const unsigned nb_queues, unsigned int blocksize, unsigned int blockcnt, unsigned int framesize, unsigned int framecnt, unsigned int qdisc_bypass, struct pmd_internals **internals, struct rte_eth_dev **eth_dev, struct rte_kvargs *kvlist) { const char *name = rte_vdev_device_name(dev); const unsigned int numa_node = dev->device.numa_node; struct rte_eth_dev_data *data = NULL; struct rte_kvargs_pair *pair = NULL; struct ifreq ifr; size_t ifnamelen; unsigned k_idx; struct sockaddr_ll sockaddr; struct tpacket_req *req; struct pkt_rx_queue *rx_queue; struct pkt_tx_queue *tx_queue; int rc, tpver, discard; int qsockfd = -1; unsigned int i, q, rdsize; #if defined(PACKET_FANOUT) int fanout_arg; #endif for (k_idx = 0; k_idx < kvlist->count; k_idx++) { pair = &kvlist->pairs[k_idx]; if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL) break; } if (pair == NULL) { PMD_LOG(ERR, "%s: no interface specified for AF_PACKET ethdev", name); return -1; } PMD_LOG(INFO, "%s: creating AF_PACKET-backed ethdev on numa socket %u", name, numa_node); *internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node); if (*internals == NULL) return -1; for (q = 0; q < nb_queues; q++) { (*internals)->rx_queue[q].map = MAP_FAILED; (*internals)->tx_queue[q].map = MAP_FAILED; } req = &((*internals)->req); req->tp_block_size = blocksize; req->tp_block_nr = blockcnt; req->tp_frame_size = framesize; req->tp_frame_nr = framecnt; ifnamelen = strlen(pair->value); if (ifnamelen < sizeof(ifr.ifr_name)) { memcpy(ifr.ifr_name, pair->value, ifnamelen); ifr.ifr_name[ifnamelen] = '\0'; } else { PMD_LOG(ERR, "%s: I/F name too long (%s)", name, pair->value); return -1; } if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) { PMD_LOG(ERR, "%s: ioctl failed (SIOCGIFINDEX)", name); return -1; } (*internals)->if_name = strdup(pair->value); if ((*internals)->if_name == NULL) return -1; (*internals)->if_index = ifr.ifr_ifindex; if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) { PMD_LOG(ERR, "%s: ioctl failed (SIOCGIFHWADDR)", name); return -1; } memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN); memset(&sockaddr, 0, sizeof(sockaddr)); sockaddr.sll_family = AF_PACKET; sockaddr.sll_protocol = htons(ETH_P_ALL); sockaddr.sll_ifindex = (*internals)->if_index; #if defined(PACKET_FANOUT) fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff; fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16; #if defined(PACKET_FANOUT_FLAG_ROLLOVER) fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16; #endif #endif for (q = 0; q < nb_queues; q++) { /* Open an AF_PACKET socket for this queue... */ qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if (qsockfd == -1) { PMD_LOG(ERR, "%s: could not open AF_PACKET socket", name); return -1; } tpver = TPACKET_V2; rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION, &tpver, sizeof(tpver)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_VERSION on AF_PACKET socket for %s", name, pair->value); goto error; } discard = 1; rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS, &discard, sizeof(discard)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_LOSS on AF_PACKET socket for %s", name, pair->value); goto error; } #if defined(PACKET_QDISC_BYPASS) rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS, &qdisc_bypass, sizeof(qdisc_bypass)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s", name, pair->value); goto error; } #else RTE_SET_USED(qdisc_bypass); #endif rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_RX_RING on AF_PACKET socket for %s", name, pair->value); goto error; } rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_TX_RING on AF_PACKET " "socket for %s", name, pair->value); goto error; } rx_queue = &((*internals)->rx_queue[q]); rx_queue->framecount = req->tp_frame_nr; rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, qsockfd, 0); if (rx_queue->map == MAP_FAILED) { PMD_LOG(ERR, "%s: call to mmap failed on AF_PACKET socket for %s", name, pair->value); goto error; } /* rdsize is same for both Tx and Rx */ rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd)); rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node); if (rx_queue->rd == NULL) goto error; for (i = 0; i < req->tp_frame_nr; ++i) { rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize); rx_queue->rd[i].iov_len = req->tp_frame_size; } rx_queue->sockfd = qsockfd; tx_queue = &((*internals)->tx_queue[q]); tx_queue->framecount = req->tp_frame_nr; tx_queue->frame_data_size = req->tp_frame_size; tx_queue->frame_data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr; tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node); if (tx_queue->rd == NULL) goto error; for (i = 0; i < req->tp_frame_nr; ++i) { tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize); tx_queue->rd[i].iov_len = req->tp_frame_size; } tx_queue->sockfd = qsockfd; rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr)); if (rc == -1) { PMD_LOG(ERR, "%s: could not bind AF_PACKET socket to %s", name, pair->value); goto error; } #if defined(PACKET_FANOUT) rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT, &fanout_arg, sizeof(fanout_arg)); if (rc == -1) { PMD_LOG(ERR, "%s: could not set PACKET_FANOUT on AF_PACKET socket " "for %s", name, pair->value); goto error; } #endif } /* reserve an ethdev entry */ *eth_dev = rte_eth_vdev_allocate(dev, 0); if (*eth_dev == NULL) goto error; /* * now put it all together * - store queue data in internals, * - store numa_node in eth_dev * - point eth_dev_data to internals * - and point eth_dev structure to new eth_dev_data structure */ (*internals)->nb_queues = nb_queues; data = (*eth_dev)->data; data->dev_private = *internals; data->nb_rx_queues = (uint16_t)nb_queues; data->nb_tx_queues = (uint16_t)nb_queues; data->dev_link = pmd_link; data->mac_addrs = &(*internals)->eth_addr; (*eth_dev)->dev_ops = &ops; return 0; error: if (qsockfd != -1) close(qsockfd); for (q = 0; q < nb_queues; q++) { munmap((*internals)->rx_queue[q].map, 2 * req->tp_block_size * req->tp_block_nr); rte_free((*internals)->rx_queue[q].rd); rte_free((*internals)->tx_queue[q].rd); if (((*internals)->rx_queue[q].sockfd != 0) && ((*internals)->rx_queue[q].sockfd != qsockfd)) close((*internals)->rx_queue[q].sockfd); } free((*internals)->if_name); rte_free(*internals); return -1; } static int rte_eth_from_packet(struct rte_vdev_device *dev, int const *sockfd, struct rte_kvargs *kvlist) { const char *name = rte_vdev_device_name(dev); struct pmd_internals *internals = NULL; struct rte_eth_dev *eth_dev = NULL; struct rte_kvargs_pair *pair = NULL; unsigned k_idx; unsigned int blockcount; unsigned int blocksize = DFLT_BLOCK_SIZE; unsigned int framesize = DFLT_FRAME_SIZE; unsigned int framecount = DFLT_FRAME_COUNT; unsigned int qpairs = 1; unsigned int qdisc_bypass = 1; /* do some parameter checking */ if (*sockfd < 0) return -1; /* * Walk arguments for configurable settings */ for (k_idx = 0; k_idx < kvlist->count; k_idx++) { pair = &kvlist->pairs[k_idx]; if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) { qpairs = atoi(pair->value); if (qpairs < 1 || qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) { PMD_LOG(ERR, "%s: invalid qpairs value", name); return -1; } continue; } if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) { blocksize = atoi(pair->value); if (!blocksize) { PMD_LOG(ERR, "%s: invalid blocksize value", name); return -1; } continue; } if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) { framesize = atoi(pair->value); if (!framesize) { PMD_LOG(ERR, "%s: invalid framesize value", name); return -1; } continue; } if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) { framecount = atoi(pair->value); if (!framecount) { PMD_LOG(ERR, "%s: invalid framecount value", name); return -1; } continue; } if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) { qdisc_bypass = atoi(pair->value); if (qdisc_bypass > 1) { PMD_LOG(ERR, "%s: invalid bypass value", name); return -1; } continue; } } if (framesize > blocksize) { PMD_LOG(ERR, "%s: AF_PACKET MMAP frame size exceeds block size!", name); return -1; } blockcount = framecount / (blocksize / framesize); if (!blockcount) { PMD_LOG(ERR, "%s: invalid AF_PACKET MMAP parameters", name); return -1; } PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name); PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize); PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount); PMD_LOG(INFO, "%s:\tframe size %d", name, framesize); PMD_LOG(INFO, "%s:\tframe count %d", name, framecount); if (rte_pmd_init_internals(dev, *sockfd, qpairs, blocksize, blockcount, framesize, framecount, qdisc_bypass, &internals, ð_dev, kvlist) < 0) return -1; eth_dev->rx_pkt_burst = eth_af_packet_rx; eth_dev->tx_pkt_burst = eth_af_packet_tx; rte_eth_dev_probing_finish(eth_dev); return 0; } static int rte_pmd_af_packet_probe(struct rte_vdev_device *dev) { int ret = 0; struct rte_kvargs *kvlist; int sockfd = -1; struct rte_eth_dev *eth_dev; const char *name = rte_vdev_device_name(dev); PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name); if (rte_eal_process_type() == RTE_PROC_SECONDARY && strlen(rte_vdev_device_args(dev)) == 0) { eth_dev = rte_eth_dev_attach_secondary(name); if (!eth_dev) { PMD_LOG(ERR, "Failed to probe %s", name); return -1; } /* TODO: request info from primary to set up Rx and Tx */ eth_dev->dev_ops = &ops; eth_dev->device = &dev->device; rte_eth_dev_probing_finish(eth_dev); return 0; } kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments); if (kvlist == NULL) { ret = -1; goto exit; } /* * If iface argument is passed we open the NICs and use them for * reading / writing */ if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) { ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG, &open_packet_iface, &sockfd); if (ret < 0) goto exit; } if (dev->device.numa_node == SOCKET_ID_ANY) dev->device.numa_node = rte_socket_id(); ret = rte_eth_from_packet(dev, &sockfd, kvlist); close(sockfd); /* no longer needed */ exit: rte_kvargs_free(kvlist); return ret; } static int rte_pmd_af_packet_remove(struct rte_vdev_device *dev) { struct rte_eth_dev *eth_dev = NULL; struct pmd_internals *internals; unsigned q; PMD_LOG(INFO, "Closing AF_PACKET ethdev on numa socket %u", rte_socket_id()); if (dev == NULL) return -1; /* find the ethdev entry */ eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev)); if (eth_dev == NULL) return -1; internals = eth_dev->data->dev_private; for (q = 0; q < internals->nb_queues; q++) { rte_free(internals->rx_queue[q].rd); rte_free(internals->tx_queue[q].rd); } free(internals->if_name); rte_free(eth_dev->data->dev_private); rte_eth_dev_release_port(eth_dev); return 0; } static struct rte_vdev_driver pmd_af_packet_drv = { .probe = rte_pmd_af_packet_probe, .remove = rte_pmd_af_packet_remove, }; RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv); RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet); RTE_PMD_REGISTER_PARAM_STRING(net_af_packet, "iface= " "qpairs= " "blocksz= " "framesz= " "framecnt= " "qdisc_bypass=<0|1>"); RTE_INIT(af_packet_init_log) { af_packet_logtype = rte_log_register("pmd.net.packet"); if (af_packet_logtype >= 0) rte_log_set_level(af_packet_logtype, RTE_LOG_NOTICE); }