1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
3 * Originally based upon librte_pmd_pcap code:
4 * Copyright(c) 2010-2015 Intel Corporation.
5 * Copyright(c) 2014 6WIND S.A.
9 #include <rte_string_fns.h>
11 #include <ethdev_driver.h>
12 #include <ethdev_vdev.h>
13 #include <rte_malloc.h>
14 #include <rte_kvargs.h>
15 #include <rte_bus_vdev.h>
18 #include <linux/if_ether.h>
19 #include <linux/if_packet.h>
20 #include <arpa/inet.h>
22 #include <net/if_arp.h>
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <sys/ioctl.h>
31 #define ETH_AF_PACKET_IFACE_ARG "iface"
32 #define ETH_AF_PACKET_NUM_Q_ARG "qpairs"
33 #define ETH_AF_PACKET_BLOCKSIZE_ARG "blocksz"
34 #define ETH_AF_PACKET_FRAMESIZE_ARG "framesz"
35 #define ETH_AF_PACKET_FRAMECOUNT_ARG "framecnt"
36 #define ETH_AF_PACKET_QDISC_BYPASS_ARG "qdisc_bypass"
38 #define DFLT_FRAME_SIZE (1 << 11)
39 #define DFLT_FRAME_COUNT (1 << 9)
46 unsigned int framecount;
47 unsigned int framenum;
49 struct rte_mempool *mb_pool;
53 volatile unsigned long rx_pkts;
54 volatile unsigned long rx_bytes;
59 unsigned int frame_data_size;
63 unsigned int framecount;
64 unsigned int framenum;
66 volatile unsigned long tx_pkts;
67 volatile unsigned long err_pkts;
68 volatile unsigned long tx_bytes;
71 struct pmd_internals {
76 struct rte_ether_addr eth_addr;
78 struct tpacket_req req;
80 struct pkt_rx_queue *rx_queue;
81 struct pkt_tx_queue *tx_queue;
85 static const char *valid_arguments[] = {
86 ETH_AF_PACKET_IFACE_ARG,
87 ETH_AF_PACKET_NUM_Q_ARG,
88 ETH_AF_PACKET_BLOCKSIZE_ARG,
89 ETH_AF_PACKET_FRAMESIZE_ARG,
90 ETH_AF_PACKET_FRAMECOUNT_ARG,
91 ETH_AF_PACKET_QDISC_BYPASS_ARG,
95 static struct rte_eth_link pmd_link = {
96 .link_speed = RTE_ETH_SPEED_NUM_10G,
97 .link_duplex = RTE_ETH_LINK_FULL_DUPLEX,
98 .link_status = RTE_ETH_LINK_DOWN,
99 .link_autoneg = RTE_ETH_LINK_FIXED,
102 RTE_LOG_REGISTER_DEFAULT(af_packet_logtype, NOTICE);
104 #define PMD_LOG(level, fmt, args...) \
105 rte_log(RTE_LOG_ ## level, af_packet_logtype, \
106 "%s(): " fmt "\n", __func__, ##args)
108 #define PMD_LOG_ERRNO(level, fmt, args...) \
109 rte_log(RTE_LOG_ ## level, af_packet_logtype, \
110 "%s(): " fmt ":%s\n", __func__, ##args, strerror(errno))
113 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
116 struct tpacket2_hdr *ppd;
117 struct rte_mbuf *mbuf;
119 struct pkt_rx_queue *pkt_q = queue;
121 unsigned long num_rx_bytes = 0;
122 unsigned int framecount, framenum;
124 if (unlikely(nb_pkts == 0))
128 * Reads the given number of packets from the AF_PACKET socket one by
129 * one and copies the packet data into a newly allocated mbuf.
131 framecount = pkt_q->framecount;
132 framenum = pkt_q->framenum;
133 for (i = 0; i < nb_pkts; i++) {
134 /* point at the next incoming frame */
135 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
136 if ((ppd->tp_status & TP_STATUS_USER) == 0)
139 /* allocate the next mbuf */
140 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
141 if (unlikely(mbuf == NULL))
144 /* packet will fit in the mbuf, go ahead and receive it */
145 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
146 pbuf = (uint8_t *) ppd + ppd->tp_mac;
147 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
149 /* check for vlan info */
150 if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
151 mbuf->vlan_tci = ppd->tp_vlan_tci;
152 mbuf->ol_flags |= (RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED);
154 if (!pkt_q->vlan_strip && rte_vlan_insert(&mbuf))
155 PMD_LOG(ERR, "Failed to reinsert VLAN tag");
158 /* release incoming frame and advance ring buffer */
159 ppd->tp_status = TP_STATUS_KERNEL;
160 if (++framenum >= framecount)
162 mbuf->port = pkt_q->in_port;
164 /* account for the receive frame */
167 num_rx_bytes += mbuf->pkt_len;
169 pkt_q->framenum = framenum;
170 pkt_q->rx_pkts += num_rx;
171 pkt_q->rx_bytes += num_rx_bytes;
176 * Check if there is an available frame in the ring
179 tx_ring_status_available(uint32_t tp_status)
182 * We eliminate the timestamp status from the packet status.
183 * This should only matter if timestamping is enabled on the socket,
184 * but there is a bug in the kernel which is fixed in newer releases.
186 * See the following kernel commit for reference:
187 * commit 171c3b151118a2fe0fc1e2a9d1b5a1570cfe82d2
188 * net: packetmmap: fix only tx timestamp on request
190 tp_status &= ~(TP_STATUS_TS_SOFTWARE | TP_STATUS_TS_RAW_HARDWARE);
192 return tp_status == TP_STATUS_AVAILABLE;
196 * Callback to handle sending packets through a real NIC.
199 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
201 struct tpacket2_hdr *ppd;
202 struct rte_mbuf *mbuf;
204 unsigned int framecount, framenum;
206 struct pkt_tx_queue *pkt_q = queue;
208 unsigned long num_tx_bytes = 0;
211 if (unlikely(nb_pkts == 0))
214 memset(&pfd, 0, sizeof(pfd));
215 pfd.fd = pkt_q->sockfd;
216 pfd.events = POLLOUT;
219 framecount = pkt_q->framecount;
220 framenum = pkt_q->framenum;
221 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
222 for (i = 0; i < nb_pkts; i++) {
225 /* drop oversized packets */
226 if (mbuf->pkt_len > pkt_q->frame_data_size) {
227 rte_pktmbuf_free(mbuf);
231 /* insert vlan info if necessary */
232 if (mbuf->ol_flags & RTE_MBUF_F_TX_VLAN) {
233 if (rte_vlan_insert(&mbuf)) {
234 rte_pktmbuf_free(mbuf);
239 /* point at the next incoming frame */
240 if (!tx_ring_status_available(ppd->tp_status)) {
241 if (poll(&pfd, 1, -1) < 0)
244 /* poll() can return POLLERR if the interface is down */
245 if (pfd.revents & POLLERR)
250 * poll() will almost always return POLLOUT, even if there
251 * are no extra buffers available
253 * This happens, because packet_poll() calls datagram_poll()
254 * which checks the space left in the socket buffer and,
255 * in the case of packet_mmap, the default socket buffer length
256 * doesn't match the requested size for the tx_ring.
257 * As such, there is almost always space left in socket buffer,
258 * which doesn't seem to be correlated to the requested size
259 * for the tx_ring in packet_mmap.
261 * This results in poll() returning POLLOUT.
263 if (!tx_ring_status_available(ppd->tp_status))
266 /* copy the tx frame data */
267 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
268 sizeof(struct sockaddr_ll);
270 struct rte_mbuf *tmp_mbuf = mbuf;
272 uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf);
273 memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len);
275 tmp_mbuf = tmp_mbuf->next;
278 ppd->tp_len = mbuf->pkt_len;
279 ppd->tp_snaplen = mbuf->pkt_len;
281 /* release incoming frame and advance ring buffer */
282 ppd->tp_status = TP_STATUS_SEND_REQUEST;
283 if (++framenum >= framecount)
285 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
288 num_tx_bytes += mbuf->pkt_len;
289 rte_pktmbuf_free(mbuf);
292 /* kick-off transmits */
293 if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1 &&
294 errno != ENOBUFS && errno != EAGAIN) {
296 * In case of a ENOBUFS/EAGAIN error all of the enqueued
297 * packets will be considered successful even though only some
305 pkt_q->framenum = framenum;
306 pkt_q->tx_pkts += num_tx;
307 pkt_q->err_pkts += i - num_tx;
308 pkt_q->tx_bytes += num_tx_bytes;
313 eth_dev_start(struct rte_eth_dev *dev)
315 dev->data->dev_link.link_status = RTE_ETH_LINK_UP;
320 * This function gets called when the current port gets stopped.
323 eth_dev_stop(struct rte_eth_dev *dev)
327 struct pmd_internals *internals = dev->data->dev_private;
329 for (i = 0; i < internals->nb_queues; i++) {
330 sockfd = internals->rx_queue[i].sockfd;
334 /* Prevent use after free in case tx fd == rx fd */
335 if (sockfd != internals->tx_queue[i].sockfd) {
336 sockfd = internals->tx_queue[i].sockfd;
341 internals->rx_queue[i].sockfd = -1;
342 internals->tx_queue[i].sockfd = -1;
345 dev->data->dev_link.link_status = RTE_ETH_LINK_DOWN;
350 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
352 struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
353 const struct rte_eth_rxmode *rxmode = &dev_conf->rxmode;
354 struct pmd_internals *internals = dev->data->dev_private;
356 internals->vlan_strip = !!(rxmode->offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP);
361 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
363 struct pmd_internals *internals = dev->data->dev_private;
365 dev_info->if_index = internals->if_index;
366 dev_info->max_mac_addrs = 1;
367 dev_info->max_rx_pktlen = RTE_ETHER_MAX_LEN;
368 dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
369 dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
370 dev_info->min_rx_bufsize = 0;
371 dev_info->tx_offload_capa = RTE_ETH_TX_OFFLOAD_MULTI_SEGS |
372 RTE_ETH_TX_OFFLOAD_VLAN_INSERT;
373 dev_info->rx_offload_capa = RTE_ETH_RX_OFFLOAD_VLAN_STRIP;
379 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
382 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
383 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
384 const struct pmd_internals *internal = dev->data->dev_private;
386 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
387 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
388 for (i = 0; i < imax; i++) {
389 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
390 igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
391 rx_total += igb_stats->q_ipackets[i];
392 rx_bytes_total += igb_stats->q_ibytes[i];
395 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
396 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
397 for (i = 0; i < imax; i++) {
398 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
399 igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
400 tx_total += igb_stats->q_opackets[i];
401 tx_err_total += internal->tx_queue[i].err_pkts;
402 tx_bytes_total += igb_stats->q_obytes[i];
405 igb_stats->ipackets = rx_total;
406 igb_stats->ibytes = rx_bytes_total;
407 igb_stats->opackets = tx_total;
408 igb_stats->oerrors = tx_err_total;
409 igb_stats->obytes = tx_bytes_total;
414 eth_stats_reset(struct rte_eth_dev *dev)
417 struct pmd_internals *internal = dev->data->dev_private;
419 for (i = 0; i < internal->nb_queues; i++) {
420 internal->rx_queue[i].rx_pkts = 0;
421 internal->rx_queue[i].rx_bytes = 0;
424 for (i = 0; i < internal->nb_queues; i++) {
425 internal->tx_queue[i].tx_pkts = 0;
426 internal->tx_queue[i].err_pkts = 0;
427 internal->tx_queue[i].tx_bytes = 0;
434 eth_dev_close(struct rte_eth_dev *dev)
436 struct pmd_internals *internals;
437 struct tpacket_req *req;
440 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
443 PMD_LOG(INFO, "Closing AF_PACKET ethdev on NUMA socket %u",
446 internals = dev->data->dev_private;
447 req = &internals->req;
448 for (q = 0; q < internals->nb_queues; q++) {
449 munmap(internals->rx_queue[q].map,
450 2 * req->tp_block_size * req->tp_block_nr);
451 rte_free(internals->rx_queue[q].rd);
452 rte_free(internals->tx_queue[q].rd);
454 free(internals->if_name);
455 rte_free(internals->rx_queue);
456 rte_free(internals->tx_queue);
458 /* mac_addrs must not be freed alone because part of dev_private */
459 dev->data->mac_addrs = NULL;
464 eth_link_update(struct rte_eth_dev *dev __rte_unused,
465 int wait_to_complete __rte_unused)
471 eth_rx_queue_setup(struct rte_eth_dev *dev,
472 uint16_t rx_queue_id,
473 uint16_t nb_rx_desc __rte_unused,
474 unsigned int socket_id __rte_unused,
475 const struct rte_eth_rxconf *rx_conf __rte_unused,
476 struct rte_mempool *mb_pool)
478 struct pmd_internals *internals = dev->data->dev_private;
479 struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
480 unsigned int buf_size, data_size;
482 pkt_q->mb_pool = mb_pool;
484 /* Now get the space available for data in the mbuf */
485 buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
486 RTE_PKTMBUF_HEADROOM;
487 data_size = internals->req.tp_frame_size;
488 data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
490 if (data_size > buf_size) {
492 "%s: %d bytes will not fit in mbuf (%d bytes)",
493 dev->device->name, data_size, buf_size);
497 dev->data->rx_queues[rx_queue_id] = pkt_q;
498 pkt_q->in_port = dev->data->port_id;
499 pkt_q->vlan_strip = internals->vlan_strip;
505 eth_tx_queue_setup(struct rte_eth_dev *dev,
506 uint16_t tx_queue_id,
507 uint16_t nb_tx_desc __rte_unused,
508 unsigned int socket_id __rte_unused,
509 const struct rte_eth_txconf *tx_conf __rte_unused)
512 struct pmd_internals *internals = dev->data->dev_private;
514 dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
519 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
521 struct pmd_internals *internals = dev->data->dev_private;
522 struct ifreq ifr = { .ifr_mtu = mtu };
525 unsigned int data_size = internals->req.tp_frame_size -
531 s = socket(PF_INET, SOCK_DGRAM, 0);
535 strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
536 ret = ioctl(s, SIOCSIFMTU, &ifr);
546 eth_dev_macaddr_set(struct rte_eth_dev *dev, struct rte_ether_addr *addr)
548 struct pmd_internals *internals = dev->data->dev_private;
549 struct ifreq ifr = { };
550 int sockfd = internals->rx_queue[0].sockfd;
554 PMD_LOG(ERR, "receive socket not found");
558 strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
559 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
560 memcpy(ifr.ifr_hwaddr.sa_data, addr, sizeof(*addr));
561 ret = ioctl(sockfd, SIOCSIFHWADDR, &ifr);
564 PMD_LOG_ERRNO(ERR, "ioctl(SIOCSIFHWADDR) failed");
572 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
578 s = socket(PF_INET, SOCK_DGRAM, 0);
582 strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
583 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
587 ifr.ifr_flags &= mask;
588 ifr.ifr_flags |= flags;
589 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
599 eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
601 struct pmd_internals *internals = dev->data->dev_private;
603 return eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
607 eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
609 struct pmd_internals *internals = dev->data->dev_private;
611 return eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
614 static const struct eth_dev_ops ops = {
615 .dev_start = eth_dev_start,
616 .dev_stop = eth_dev_stop,
617 .dev_close = eth_dev_close,
618 .dev_configure = eth_dev_configure,
619 .dev_infos_get = eth_dev_info,
620 .mac_addr_set = eth_dev_macaddr_set,
621 .mtu_set = eth_dev_mtu_set,
622 .promiscuous_enable = eth_dev_promiscuous_enable,
623 .promiscuous_disable = eth_dev_promiscuous_disable,
624 .rx_queue_setup = eth_rx_queue_setup,
625 .tx_queue_setup = eth_tx_queue_setup,
626 .link_update = eth_link_update,
627 .stats_get = eth_stats_get,
628 .stats_reset = eth_stats_reset,
632 * Opens an AF_PACKET socket
635 open_packet_iface(const char *key __rte_unused,
636 const char *value __rte_unused,
639 int *sockfd = extra_args;
641 /* Open an AF_PACKET socket... */
642 *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
644 PMD_LOG(ERR, "Could not open AF_PACKET socket");
652 rte_pmd_init_internals(struct rte_vdev_device *dev,
654 const unsigned nb_queues,
655 unsigned int blocksize,
656 unsigned int blockcnt,
657 unsigned int framesize,
658 unsigned int framecnt,
659 unsigned int qdisc_bypass,
660 struct pmd_internals **internals,
661 struct rte_eth_dev **eth_dev,
662 struct rte_kvargs *kvlist)
664 const char *name = rte_vdev_device_name(dev);
665 const unsigned int numa_node = dev->device.numa_node;
666 struct rte_eth_dev_data *data = NULL;
667 struct rte_kvargs_pair *pair = NULL;
671 struct sockaddr_ll sockaddr;
672 struct tpacket_req *req;
673 struct pkt_rx_queue *rx_queue;
674 struct pkt_tx_queue *tx_queue;
675 int rc, tpver, discard;
677 unsigned int i, q, rdsize;
678 #if defined(PACKET_FANOUT)
682 for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
683 pair = &kvlist->pairs[k_idx];
684 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
689 "%s: no interface specified for AF_PACKET ethdev",
695 "%s: creating AF_PACKET-backed ethdev on numa socket %u",
698 *internals = rte_zmalloc_socket(name, sizeof(**internals),
700 if (*internals == NULL)
704 (*internals)->rx_queue = rte_calloc_socket("af_packet_rx",
706 sizeof(struct pkt_rx_queue),
708 (*internals)->tx_queue = rte_calloc_socket("af_packet_tx",
710 sizeof(struct pkt_tx_queue),
712 if (!(*internals)->rx_queue || !(*internals)->tx_queue) {
716 for (q = 0; q < nb_queues; q++) {
717 (*internals)->rx_queue[q].map = MAP_FAILED;
718 (*internals)->tx_queue[q].map = MAP_FAILED;
719 (*internals)->rx_queue[q].sockfd = -1;
720 (*internals)->tx_queue[q].sockfd = -1;
723 req = &((*internals)->req);
725 req->tp_block_size = blocksize;
726 req->tp_block_nr = blockcnt;
727 req->tp_frame_size = framesize;
728 req->tp_frame_nr = framecnt;
730 ifnamelen = strlen(pair->value);
731 if (ifnamelen < sizeof(ifr.ifr_name)) {
732 memcpy(ifr.ifr_name, pair->value, ifnamelen);
733 ifr.ifr_name[ifnamelen] = '\0';
736 "%s: I/F name too long (%s)",
740 if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
741 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFINDEX)", name);
744 (*internals)->if_name = strdup(pair->value);
745 if ((*internals)->if_name == NULL)
747 (*internals)->if_index = ifr.ifr_ifindex;
749 if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
750 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFHWADDR)", name);
753 memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
755 memset(&sockaddr, 0, sizeof(sockaddr));
756 sockaddr.sll_family = AF_PACKET;
757 sockaddr.sll_protocol = htons(ETH_P_ALL);
758 sockaddr.sll_ifindex = (*internals)->if_index;
760 #if defined(PACKET_FANOUT)
761 fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
762 fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
763 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
764 fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
768 for (q = 0; q < nb_queues; q++) {
769 /* Open an AF_PACKET socket for this queue... */
770 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
773 "%s: could not open AF_PACKET socket",
779 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
780 &tpver, sizeof(tpver));
783 "%s: could not set PACKET_VERSION on AF_PACKET socket for %s",
789 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
790 &discard, sizeof(discard));
793 "%s: could not set PACKET_LOSS on AF_PACKET socket for %s",
799 #if defined(PACKET_QDISC_BYPASS)
800 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
801 &qdisc_bypass, sizeof(qdisc_bypass));
804 "%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s",
811 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
814 "%s: could not set PACKET_RX_RING on AF_PACKET socket for %s",
819 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
822 "%s: could not set PACKET_TX_RING on AF_PACKET "
823 "socket for %s", name, pair->value);
827 rx_queue = &((*internals)->rx_queue[q]);
828 rx_queue->framecount = req->tp_frame_nr;
830 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
831 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
833 if (rx_queue->map == MAP_FAILED) {
835 "%s: call to mmap failed on AF_PACKET socket for %s",
840 /* rdsize is same for both Tx and Rx */
841 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
843 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
844 if (rx_queue->rd == NULL)
846 for (i = 0; i < req->tp_frame_nr; ++i) {
847 rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
848 rx_queue->rd[i].iov_len = req->tp_frame_size;
850 rx_queue->sockfd = qsockfd;
852 tx_queue = &((*internals)->tx_queue[q]);
853 tx_queue->framecount = req->tp_frame_nr;
854 tx_queue->frame_data_size = req->tp_frame_size;
855 tx_queue->frame_data_size -= TPACKET2_HDRLEN -
856 sizeof(struct sockaddr_ll);
858 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
860 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
861 if (tx_queue->rd == NULL)
863 for (i = 0; i < req->tp_frame_nr; ++i) {
864 tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
865 tx_queue->rd[i].iov_len = req->tp_frame_size;
867 tx_queue->sockfd = qsockfd;
869 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
872 "%s: could not bind AF_PACKET socket to %s",
877 #if defined(PACKET_FANOUT)
878 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
879 &fanout_arg, sizeof(fanout_arg));
882 "%s: could not set PACKET_FANOUT on AF_PACKET socket for %s",
889 /* reserve an ethdev entry */
890 *eth_dev = rte_eth_vdev_allocate(dev, 0);
891 if (*eth_dev == NULL)
895 * now put it all together
896 * - store queue data in internals,
897 * - store numa_node in eth_dev
898 * - point eth_dev_data to internals
899 * - and point eth_dev structure to new eth_dev_data structure
902 (*internals)->nb_queues = nb_queues;
904 data = (*eth_dev)->data;
905 data->dev_private = *internals;
906 data->nb_rx_queues = (uint16_t)nb_queues;
907 data->nb_tx_queues = (uint16_t)nb_queues;
908 data->dev_link = pmd_link;
909 data->mac_addrs = &(*internals)->eth_addr;
910 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
912 (*eth_dev)->dev_ops = &ops;
919 for (q = 0; q < nb_queues; q++) {
920 if ((*internals)->rx_queue[q].map != MAP_FAILED)
921 munmap((*internals)->rx_queue[q].map,
922 2 * req->tp_block_size * req->tp_block_nr);
924 rte_free((*internals)->rx_queue[q].rd);
925 rte_free((*internals)->tx_queue[q].rd);
926 if (((*internals)->rx_queue[q].sockfd >= 0) &&
927 ((*internals)->rx_queue[q].sockfd != qsockfd))
928 close((*internals)->rx_queue[q].sockfd);
931 rte_free((*internals)->rx_queue);
932 rte_free((*internals)->tx_queue);
933 free((*internals)->if_name);
934 rte_free(*internals);
939 rte_eth_from_packet(struct rte_vdev_device *dev,
941 struct rte_kvargs *kvlist)
943 const char *name = rte_vdev_device_name(dev);
944 struct pmd_internals *internals = NULL;
945 struct rte_eth_dev *eth_dev = NULL;
946 struct rte_kvargs_pair *pair = NULL;
948 unsigned int blockcount;
949 unsigned int blocksize;
950 unsigned int framesize = DFLT_FRAME_SIZE;
951 unsigned int framecount = DFLT_FRAME_COUNT;
952 unsigned int qpairs = 1;
953 unsigned int qdisc_bypass = 1;
955 /* do some parameter checking */
959 blocksize = getpagesize();
962 * Walk arguments for configurable settings
964 for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
965 pair = &kvlist->pairs[k_idx];
966 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
967 qpairs = atoi(pair->value);
970 "%s: invalid qpairs value",
976 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
977 blocksize = atoi(pair->value);
980 "%s: invalid blocksize value",
986 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
987 framesize = atoi(pair->value);
990 "%s: invalid framesize value",
996 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
997 framecount = atoi(pair->value);
1000 "%s: invalid framecount value",
1006 if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) {
1007 qdisc_bypass = atoi(pair->value);
1008 if (qdisc_bypass > 1) {
1010 "%s: invalid bypass value",
1018 if (framesize > blocksize) {
1020 "%s: AF_PACKET MMAP frame size exceeds block size!",
1025 blockcount = framecount / (blocksize / framesize);
1028 "%s: invalid AF_PACKET MMAP parameters", name);
1032 PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name);
1033 PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize);
1034 PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount);
1035 PMD_LOG(INFO, "%s:\tframe size %d", name, framesize);
1036 PMD_LOG(INFO, "%s:\tframe count %d", name, framecount);
1038 if (rte_pmd_init_internals(dev, *sockfd, qpairs,
1039 blocksize, blockcount,
1040 framesize, framecount,
1042 &internals, ð_dev,
1046 eth_dev->rx_pkt_burst = eth_af_packet_rx;
1047 eth_dev->tx_pkt_burst = eth_af_packet_tx;
1049 rte_eth_dev_probing_finish(eth_dev);
1054 rte_pmd_af_packet_probe(struct rte_vdev_device *dev)
1057 struct rte_kvargs *kvlist;
1059 struct rte_eth_dev *eth_dev;
1060 const char *name = rte_vdev_device_name(dev);
1062 PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name);
1064 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1065 eth_dev = rte_eth_dev_attach_secondary(name);
1067 PMD_LOG(ERR, "Failed to probe %s", name);
1070 /* TODO: request info from primary to set up Rx and Tx */
1071 eth_dev->dev_ops = &ops;
1072 eth_dev->device = &dev->device;
1073 rte_eth_dev_probing_finish(eth_dev);
1077 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1078 if (kvlist == NULL) {
1084 * If iface argument is passed we open the NICs and use them for
1087 if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
1089 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
1090 &open_packet_iface, &sockfd);
1095 if (dev->device.numa_node == SOCKET_ID_ANY)
1096 dev->device.numa_node = rte_socket_id();
1098 ret = rte_eth_from_packet(dev, &sockfd, kvlist);
1099 close(sockfd); /* no longer needed */
1102 rte_kvargs_free(kvlist);
1107 rte_pmd_af_packet_remove(struct rte_vdev_device *dev)
1109 struct rte_eth_dev *eth_dev;
1114 /* find the ethdev entry */
1115 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1116 if (eth_dev == NULL)
1117 return 0; /* port already released */
1119 eth_dev_close(eth_dev);
1120 rte_eth_dev_release_port(eth_dev);
1125 static struct rte_vdev_driver pmd_af_packet_drv = {
1126 .probe = rte_pmd_af_packet_probe,
1127 .remove = rte_pmd_af_packet_remove,
1130 RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
1131 RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
1132 RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
1138 "qdisc_bypass=<0|1>");