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af_packet: add PMD for AF_PACKET-based virtual devices

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This is a Linux-specific virtual PMD driver backed by an AF_PACKET
socket.  This implementation uses mmap'ed ring buffers to limit copying
and user/kernel transitions.  The PACKET_FANOUT_HASH behavior of
AF_PACKET is used for frame reception.  In the current implementation,
Tx and Rx queues are always paired, and therefore are always equal
in number -- changing this would be a Simple Matter Of Programming.

Interfaces of this type are created with a command line option like
"--vdev=eth_af_packet0,iface=...".  There are a number of options available
as arguments:

 - Interface is chosen by "iface" (required)
 - Number of queue pairs set by "qpairs" (optional, default: 1)
 - AF_PACKET MMAP block size set by "blocksz" (optional, default: 4096)
 - AF_PACKET MMAP frame size set by "framesz" (optional, default: 2048)
 - AF_PACKET MMAP frame count set by "framecnt" (optional, default: 512)

Signed-off-by: John W. Linville <linville@tuxdriver.com>
[Thomas: disable because of incompatibility with some kernels]
This commit is contained in:
John W. Linville 2014-11-17 10:57:58 -05:00 committed by Thomas Monjalon
parent 70cb699206
commit 364e08f2bb
7 changed files with 950 additions and 0 deletions
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5
config/common_linuxapp
View File

@ -246,6 +246,11 @@ CONFIG_RTE_LIBRTE_PMD_PCAP=n
#
CONFIG_RTE_LIBRTE_PMD_BOND=y
#
# Compile software PMD backed by AF_PACKET sockets (Linux only)
#
CONFIG_RTE_LIBRTE_PMD_AF_PACKET=n
#
# Compile Xen PMD
#

1
lib/Makefile
View File

@ -47,6 +47,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += librte_pmd_i40e
DIRS-$(CONFIG_RTE_LIBRTE_PMD_BOND) += librte_pmd_bond
DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += librte_pmd_ring
DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += librte_pmd_pcap
DIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += librte_pmd_af_packet
DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += librte_pmd_virtio
DIRS-$(CONFIG_RTE_LIBRTE_VMXNET3_PMD) += librte_pmd_vmxnet3
DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += librte_pmd_xenvirt

1
lib/librte_eal/linuxapp/eal/Makefile
View File

@ -44,6 +44,7 @@ CFLAGS += -I$(RTE_SDK)/lib/librte_ether
CFLAGS += -I$(RTE_SDK)/lib/librte_ivshmem
CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_ring
CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_pcap
CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_af_packet
CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_xenvirt
CFLAGS += $(WERROR_FLAGS) -O3

60
lib/librte_pmd_af_packet/Makefile Normal file
View File

@ -0,0 +1,60 @@
# BSD LICENSE
#
# Copyright(c) 2014 John W. Linville <linville@redhat.com>
# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
# Copyright(c) 2014 6WIND S.A.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Intel Corporation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
include $(RTE_SDK)/mk/rte.vars.mk
#
# library name
#
LIB = librte_pmd_af_packet.a
CFLAGS += -O3
CFLAGS += $(WERROR_FLAGS)
#
# all source are stored in SRCS-y
#
SRCS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += rte_eth_af_packet.c
#
# Export include files
#
SYMLINK-y-include += rte_eth_af_packet.h
# this lib depends upon:
DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += lib/librte_mbuf
DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += lib/librte_ether
DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += lib/librte_malloc
DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += lib/librte_kvargs
include $(RTE_SDK)/mk/rte.lib.mk

826
lib/librte_pmd_af_packet/rte_eth_af_packet.c Normal file
View File

@ -0,0 +1,826 @@
/*-
* BSD LICENSE
*
* Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
*
* Originally based upon librte_pmd_pcap code:
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* Copyright(c) 2014 6WIND S.A.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_kvargs.h>
#include <rte_dev.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <poll.h>
#include "rte_eth_af_packet.h"
#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 DFLT_BLOCK_SIZE (1 << 12)
#define DFLT_FRAME_SIZE (1 << 11)
#define DFLT_FRAME_COUNT (1 << 9)
struct pkt_rx_queue {
int sockfd;
struct iovec *rd;
uint8_t *map;
unsigned int framecount;
unsigned int framenum;
struct rte_mempool *mb_pool;
volatile unsigned long rx_pkts;
volatile unsigned long err_pkts;
};
struct pkt_tx_queue {
int sockfd;
struct iovec *rd;
uint8_t *map;
unsigned int framecount;
unsigned int framenum;
volatile unsigned long tx_pkts;
volatile unsigned long err_pkts;
};
struct pmd_internals {
unsigned nb_queues;
int if_index;
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,
NULL
};
static const char *drivername = "AF_PACKET PMD";
static struct rte_eth_link pmd_link = {
.link_speed = 10000,
.link_duplex = ETH_LINK_FULL_DUPLEX,
.link_status = 0
};
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 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));
/* release incoming frame and advance ring buffer */
ppd->tp_status = TP_STATUS_KERNEL;
if (++framenum >= framecount)
framenum = 0;
/* account for the receive frame */
bufs[i] = mbuf;
num_rx++;
}
pkt_q->framenum = framenum;
pkt_q->rx_pkts += num_rx;
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;
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++) {
/* point at the next incoming frame */
if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
(poll(&pfd, 1, -1) < 0))
continue;
/* copy the tx frame data */
mbuf = bufs[num_tx];
pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
sizeof(struct sockaddr_ll);
memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf));
ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf);
/* 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++;
rte_pktmbuf_free(mbuf);
}
/* kick-off transmits */
sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
pkt_q->framenum = framenum;
pkt_q->tx_pkts += num_tx;
pkt_q->err_pkts += nb_pkts - num_tx;
return num_tx;
}
static int
eth_dev_start(struct rte_eth_dev *dev)
{
dev->data->dev_link.link_status = 1;
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);
sockfd = internals->tx_queue[i].sockfd;
if (sockfd != -1)
close(sockfd);
}
dev->data->dev_link.link_status = 0;
}
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->driver_name = drivername;
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;
dev_info->pci_dev = NULL;
}
static void
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;
const struct pmd_internals *internal = dev->data->dev_private;
memset(igb_stats, 0, sizeof(*igb_stats));
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;
rx_total += igb_stats->q_ipackets[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;
tx_total += igb_stats->q_opackets[i];
tx_err_total += igb_stats->q_errors[i];
}
igb_stats->ipackets = rx_total;
igb_stats->opackets = tx_total;
igb_stats->oerrors = tx_err_total;
}
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;
for (i = 0; i < internal->nb_queues; i++) {
internal->tx_queue[i].tx_pkts = 0;
internal->tx_queue[i].err_pkts = 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];
struct rte_pktmbuf_pool_private *mbp_priv;
uint16_t buf_size;
pkt_q->mb_pool = mb_pool;
/* Now get the space available for data in the mbuf */
mbp_priv = rte_mempool_get_priv(pkt_q->mb_pool);
buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
RTE_PKTMBUF_HEADROOM);
if (ETH_FRAME_LEN > buf_size) {
RTE_LOG(ERR, PMD,
"%s: %d bytes will not fit in mbuf (%d bytes)\n",
dev->data->name, ETH_FRAME_LEN, buf_size);
return -ENOMEM;
}
dev->data->rx_queues[rx_queue_id] = pkt_q;
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 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,
.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) {
RTE_LOG(ERR, PMD, "Could not open AF_PACKET socket\n");
return -1;
}
return 0;
}
static int
rte_pmd_init_internals(const char *name,
const int sockfd,
const unsigned nb_queues,
unsigned int blocksize,
unsigned int blockcnt,
unsigned int framesize,
unsigned int framecnt,
const unsigned numa_node,
struct pmd_internals **internals,
struct rte_eth_dev **eth_dev,
struct rte_kvargs *kvlist)
{
struct rte_eth_dev_data *data = NULL;
struct rte_pci_device *pci_dev = 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, bypass;
unsigned int i, q, rdsize;
int qsockfd, fanout_arg;
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) {
RTE_LOG(ERR, PMD,
"%s: no interface specified for AF_PACKET ethdev\n",
name);
goto error;
}
RTE_LOG(INFO, PMD,
"%s: creating AF_PACKET-backed ethdev on numa socket %u\n",
name, numa_node);
/*
* now do all data allocation - for eth_dev structure, dummy pci driver
* and internal (private) data
*/
data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
if (data == NULL)
goto error;
pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
if (pci_dev == NULL)
goto error;
*internals = rte_zmalloc_socket(name, sizeof(**internals),
0, numa_node);
if (*internals == NULL)
goto error;
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 {
RTE_LOG(ERR, PMD,
"%s: I/F name too long (%s)\n",
name, pair->value);
goto error;
}
if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
RTE_LOG(ERR, PMD,
"%s: ioctl failed (SIOCGIFINDEX)\n",
name);
goto error;
}
(*internals)->if_index = ifr.ifr_ifindex;
if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
RTE_LOG(ERR, PMD,
"%s: ioctl failed (SIOCGIFHWADDR)\n",
name);
goto error;
}
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;
fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG |
PACKET_FANOUT_FLAG_ROLLOVER) << 16;
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) {
RTE_LOG(ERR, PMD,
"%s: could not open AF_PACKET socket\n",
name);
return -1;
}
tpver = TPACKET_V2;
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
&tpver, sizeof(tpver));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_VERSION on AF_PACKET "
"socket for %s\n", name, pair->value);
goto error;
}
discard = 1;
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
&discard, sizeof(discard));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_LOSS on "
"AF_PACKET socket for %s\n", name, pair->value);
goto error;
}
bypass = 1;
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
&bypass, sizeof(bypass));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_QDISC_BYPASS "
"on AF_PACKET socket for %s\n", name,
pair->value);
goto error;
}
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_RX_RING on AF_PACKET "
"socket for %s\n", name, pair->value);
goto error;
}
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_TX_RING on AF_PACKET "
"socket for %s\n", 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) {
RTE_LOG(ERR, PMD,
"%s: call to mmap failed on AF_PACKET socket for %s\n",
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);
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->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
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) {
RTE_LOG(ERR, PMD,
"%s: could not bind AF_PACKET socket to %s\n",
name, pair->value);
goto error;
}
rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
&fanout_arg, sizeof(fanout_arg));
if (rc == -1) {
RTE_LOG(ERR, PMD,
"%s: could not set PACKET_FANOUT on AF_PACKET socket "
"for %s\n", name, pair->value);
goto error;
}
}
/* reserve an ethdev entry */
*eth_dev = rte_eth_dev_allocate(name);
if (*eth_dev == NULL)
goto error;
/*
* now put it all together
* - store queue data in internals,
* - store numa_node info in pci_driver
* - point eth_dev_data to internals and pci_driver
* - and point eth_dev structure to new eth_dev_data structure
*/
(*internals)->nb_queues = nb_queues;
data->dev_private = *internals;
data->port_id = (*eth_dev)->data->port_id;
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;
pci_dev->numa_node = numa_node;
(*eth_dev)->data = data;
(*eth_dev)->dev_ops = &ops;
(*eth_dev)->pci_dev = pci_dev;
return 0;
error:
if (data)
rte_free(data);
if (pci_dev)
rte_free(pci_dev);
for (q = 0; q < nb_queues; q++) {
if ((*internals)->rx_queue[q].rd)
rte_free((*internals)->rx_queue[q].rd);
if ((*internals)->tx_queue[q].rd)
rte_free((*internals)->tx_queue[q].rd);
}
if (*internals)
rte_free(*internals);
return -1;
}
static int
rte_eth_from_packet(const char *name,
int const *sockfd,
const unsigned numa_node,
struct rte_kvargs *kvlist)
{
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;
/* 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) {
RTE_LOG(ERR, PMD,
"%s: invalid qpairs value\n",
name);
return -1;
}
continue;
}
if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
blocksize = atoi(pair->value);
if (!blocksize) {
RTE_LOG(ERR, PMD,
"%s: invalid blocksize value\n",
name);
return -1;
}
continue;
}
if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
framesize = atoi(pair->value);
if (!framesize) {
RTE_LOG(ERR, PMD,
"%s: invalid framesize value\n",
name);
return -1;
}
continue;
}
if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
framecount = atoi(pair->value);
if (!framecount) {
RTE_LOG(ERR, PMD,
"%s: invalid framecount value\n",
name);
return -1;
}
continue;
}
}
if (framesize > blocksize) {
RTE_LOG(ERR, PMD,
"%s: AF_PACKET MMAP frame size exceeds block size!\n",
name);
return -1;
}
blockcount = framecount / (blocksize / framesize);
if (!blockcount) {
RTE_LOG(ERR, PMD,
"%s: invalid AF_PACKET MMAP parameters\n", name);
return -1;
}
RTE_LOG(INFO, PMD, "%s: AF_PACKET MMAP parameters:\n", name);
RTE_LOG(INFO, PMD, "%s:\tblock size %d\n", name, blocksize);
RTE_LOG(INFO, PMD, "%s:\tblock count %d\n", name, blockcount);
RTE_LOG(INFO, PMD, "%s:\tframe size %d\n", name, framesize);
RTE_LOG(INFO, PMD, "%s:\tframe count %d\n", name, framecount);
if (rte_pmd_init_internals(name, *sockfd, qpairs,
blocksize, blockcount,
framesize, framecount,
numa_node, &internals, &eth_dev,
kvlist) < 0)
return -1;
eth_dev->rx_pkt_burst = eth_af_packet_rx;
eth_dev->tx_pkt_burst = eth_af_packet_tx;
return 0;
}
int
rte_pmd_af_packet_devinit(const char *name, const char *params)
{
unsigned numa_node;
int ret;
struct rte_kvargs *kvlist;
int sockfd = -1;
RTE_LOG(INFO, PMD, "Initializing pmd_af_packet for %s\n", name);
numa_node = rte_socket_id();
kvlist = rte_kvargs_parse(params, valid_arguments);
if (kvlist == NULL)
return -1;
/*
* 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)
return -1;
}
ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
close(sockfd); /* no longer needed */
if (ret < 0)
return -1;
return 0;
}
static struct rte_driver pmd_af_packet_drv = {
.name = "eth_af_packet",
.type = PMD_VDEV,
.init = rte_pmd_af_packet_devinit,
};
PMD_REGISTER_DRIVER(pmd_af_packet_drv);

53
lib/librte_pmd_af_packet/rte_eth_af_packet.h Normal file
View File

@ -0,0 +1,53 @@
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_ETH_AF_PACKET_H_
#define _RTE_ETH_AF_PACKET_H_
#ifdef __cplusplus
extern "C" {
#endif
#define RTE_PMD_AF_PACKET_MAX_RINGS 16
/**
* For use by the EAL only. Called as part of EAL init to set up any dummy NICs
* configured on command line.
*/
int rte_pmd_af_packet_devinit(const char *name, const char *params);
#ifdef __cplusplus
}
#endif
#endif

4
mk/rte.app.mk
View File

@ -215,6 +215,10 @@ ifeq ($(CONFIG_RTE_LIBRTE_PMD_PCAP),y)
LDLIBS += -lrte_pmd_pcap -lpcap
endif
ifeq ($(CONFIG_RTE_LIBRTE_PMD_AF_PACKET),y)
LDLIBS += -lrte_pmd_af_packet
endif
endif # plugins
LDLIBS += $(EXECENV_LDLIBS)