[dpdk-dev] [RFC] librte_pmd_packet: add PMD for AF_PACKET-based virtual devices
John W. Linville
linville at tuxdriver.com
Fri Jun 6 21:25:54 CEST 2014
This is a Linux-specific virtual PMD driver backed by an AF_PACKET
socket. The current implementation uses mmap'ed ring buffers to
limit copying and user/kernel transitions. The intent is also to take
advantage of fanout and any future AF_PACKET optimizations as well.
This is intended to provide a means for using DPDK on a broad range
of hardware without hardware-specifi PMDs and hopefully with better
performance than what PCAP offers in Linux. This might be useful
as a development platform for DPDK applications when DPDK-supported
hardware is expensive or unavailable.
Signed-off-by: John W. Linville <linville at tuxdriver.com>
---
I've been toying with this for a while without a lot of progress.
I was about to post the original RFC patch just as the PMD
initialization flows got rewritten. I set this down while that was
settling-out, and only just recently got back to it.
Anyway, I figure it is better to get this out now and let people
comment on it and/or get some use out of it if they can. I have
posted this as RFC as it has only had very limited testing locally
and I'm sure it still could use some clean-ups and improvements
(like parameterizing block/frame size/count).
config/common_bsdapp | 5 +
config/common_linuxapp | 5 +
lib/Makefile | 1 +
lib/librte_eal/linuxapp/eal/Makefile | 1 +
lib/librte_pmd_packet/Makefile | 60 +++
lib/librte_pmd_packet/rte_eth_packet.c | 706 +++++++++++++++++++++++++++++++++
lib/librte_pmd_packet/rte_eth_packet.h | 53 +++
mk/rte.app.mk | 4 +
8 files changed, 835 insertions(+)
create mode 100644 lib/librte_pmd_packet/Makefile
create mode 100644 lib/librte_pmd_packet/rte_eth_packet.c
create mode 100644 lib/librte_pmd_packet/rte_eth_packet.h
diff --git a/config/common_bsdapp b/config/common_bsdapp
index 2cc7b800b37b..b28c22820719 100644
--- a/config/common_bsdapp
+++ b/config/common_bsdapp
@@ -187,6 +187,11 @@ CONFIG_RTE_PMD_RING_MAX_TX_RINGS=16
CONFIG_RTE_LIBRTE_PMD_PCAP=y
#
+# Compile software PMD backed by AF_PACKET sockets (Linux only)
+#
+CONFIG_RTE_LIBRTE_PMD_PACKET=n
+
+#
# Do prefetch of packet data within PMD driver receive function
#
CONFIG_RTE_PMD_PACKET_PREFETCH=y
diff --git a/config/common_linuxapp b/config/common_linuxapp
index 62619c6c3a38..3ee29e1dd7ed 100644
--- a/config/common_linuxapp
+++ b/config/common_linuxapp
@@ -210,6 +210,11 @@ CONFIG_RTE_PMD_RING_MAX_TX_RINGS=16
#
CONFIG_RTE_LIBRTE_PMD_PCAP=n
+#
+# Compile software PMD backed by AF_PACKET sockets (Linux only)
+#
+CONFIG_RTE_LIBRTE_PMD_PACKET=y
+
CONFIG_RTE_LIBRTE_PMD_XENVIRT=n
diff --git a/lib/Makefile b/lib/Makefile
index b92b3921e654..d530097e132b 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -44,6 +44,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_E1000_PMD) += librte_pmd_e1000
DIRS-$(CONFIG_RTE_LIBRTE_IXGBE_PMD) += librte_pmd_ixgbe
DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += librte_pmd_ring
DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += librte_pmd_pcap
+DIRS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += librte_pmd_packet
DIRS-$(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
diff --git a/lib/librte_eal/linuxapp/eal/Makefile b/lib/librte_eal/linuxapp/eal/Makefile
index b05282047709..95ab389d8d74 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -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$(RTE_SDK)/lib/librte_pmd_packet
CFLAGS += -I$(RTE_SDK)/lib/librte_pmd_xenvirt
CFLAGS += $(WERROR_FLAGS) -O3
diff --git a/lib/librte_pmd_packet/Makefile b/lib/librte_pmd_packet/Makefile
new file mode 100644
index 000000000000..e1266fb992cd
--- /dev/null
+++ b/lib/librte_pmd_packet/Makefile
@@ -0,0 +1,60 @@
+# BSD LICENSE
+#
+# Copyright(c) 2014 John W. Linville <linville at 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_packet.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += rte_eth_packet.c
+
+#
+# Export include files
+#
+SYMLINK-y-include += rte_eth_packet.h
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += lib/librte_malloc
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PACKET) += lib/librte_kvargs
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_pmd_packet/rte_eth_packet.c b/lib/librte_pmd_packet/rte_eth_packet.c
new file mode 100644
index 000000000000..5fb62df40d92
--- /dev/null
+++ b/lib/librte_pmd_packet/rte_eth_packet.c
@@ -0,0 +1,706 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2014 John W. Linville <linville at 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_packet.h"
+
+#define ETH_PACKET_IFACE_ARG "iface"
+
+/* These should be parameterized... */
+#define BLOCKSIZ (1 << 16)
+#define BLOCKCNT (1 << 2)
+#define FRAMESIZ (1 << 11)
+#define FRAMECNT ((BLOCKSIZ * BLOCKCNT) / FRAMESIZ)
+#define FRMCNTMSK (FRAMECNT - 1)
+
+struct pkt_rx_queue {
+ int sockfd;
+
+ struct iovec *rd;
+ uint8_t *map;
+ 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 framenum;
+
+ volatile unsigned long tx_pkts;
+ volatile unsigned long err_pkts;
+};
+
+struct pmd_internals {
+ unsigned nb_rx_queues;
+ unsigned nb_tx_queues;
+
+ int if_index;
+ struct ether_addr eth_addr;
+
+ struct tpacket_req req;
+
+ struct pkt_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
+ struct pkt_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
+};
+
+static const char *valid_arguments[] = {
+ ETH_PACKET_IFACE_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_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 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.
+ */
+ 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 */
+ mbuf->pkt.pkt_len = mbuf->pkt.data_len = ppd->tp_snaplen;
+ pbuf = (uint8_t *) ppd + ppd->tp_mac;
+ memcpy(mbuf->pkt.data, pbuf, mbuf->pkt.data_len);
+
+ /* release incoming frame and advance ring buffer */
+ ppd->tp_status = TP_STATUS_KERNEL;
+ framenum = (framenum + 1) & FRMCNTMSK;
+
+ /* 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_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 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;
+
+ 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, mbuf->pkt.data, mbuf->pkt.data_len);
+ ppd->tp_len = ppd->tp_snaplen = mbuf->pkt.data_len;
+
+ /* release incoming frame and advance ring buffer */
+ ppd->tp_status = TP_STATUS_SEND_REQUEST;
+ framenum = (framenum + 1) & FRMCNTMSK;
+ ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
+
+ num_tx++;
+ rte_pktmbuf_free(mbuf);
+ }
+
+ /* kick-off transmits */
+ send(pkt_q->sockfd, NULL, 0, 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_tx_queues; i++) {
+ 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_rx_queues;
+ dev_info->max_tx_queues = (uint16_t)internals->nb_tx_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_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
+ internal->nb_rx_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_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
+ internal->nb_tx_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_rx_queues; i++)
+ internal->rx_queue[i].rx_pkts = 0;
+
+ for (i = 0; i < internal->nb_tx_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,
+ "AF_PACKET %d bytes will not fit in mbuf (%d bytes)\n",
+ 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 int sockfd,
+ const unsigned nb_rx_queues,
+ const unsigned nb_tx_queues,
+ 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, rdsize;
+
+
+ for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
+ pair = &kvlist->pairs[k_idx];
+ if (strstr(pair->key, ETH_PACKET_IFACE_ARG) != NULL)
+ break;
+ }
+ if (pair == NULL) {
+ RTE_LOG(ERR, PMD,
+ "No interface specified for AF_PACKET ethdev\n");
+ goto error;
+ }
+
+ RTE_LOG(INFO, PMD,
+ "Creating AF_PACKET-backed ethdev on numa socket %u\n",
+ numa_node);
+
+ /*
+ * now do all data allocation - for eth_dev structure, dummy pci driver
+ * and internal (private) data
+ */
+ data = rte_zmalloc_socket(NULL, sizeof(*data), 0, numa_node);
+ if (data == NULL)
+ goto error;
+
+ pci_dev = rte_zmalloc_socket(NULL, sizeof(*pci_dev), 0, numa_node);
+ if (pci_dev == NULL)
+ goto error;
+
+ *internals = rte_zmalloc_socket(NULL, sizeof(**internals),
+ 0, numa_node);
+ if (*internals == NULL)
+ goto error;
+
+ tpver = TPACKET_V2;
+ rc = setsockopt(sockfd, SOL_PACKET, PACKET_VERSION,
+ &tpver, sizeof(tpver));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not set PACKET_VERSION on AF_PACKET "
+ "socket for %s\n", pair->value);
+ goto error;
+ }
+
+ discard = 1;
+ rc = setsockopt(sockfd, SOL_PACKET, PACKET_LOSS,
+ &discard, sizeof(discard));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not set PACKET_LOSS on AF_PACKET socket "
+ "for %s\n", pair->value);
+ goto error;
+ }
+
+ bypass = 1;
+ rc = setsockopt(sockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
+ &bypass, sizeof(bypass));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not set PACKET_QDISC_BYPASS on AF_PACKET socket "
+ "for %s\n", pair->value);
+ goto error;
+ }
+
+ req = &((*internals)->req);
+
+ req->tp_block_size = BLOCKSIZ;
+ req->tp_block_nr = BLOCKCNT;
+ req->tp_frame_size = FRAMESIZ;
+ req->tp_frame_nr = FRAMECNT;
+
+ rc = setsockopt(sockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not set PACKET_RX_RING on AF_PACKET "
+ "socket for %s\n", pair->value);
+ goto error;
+ }
+
+ rc = setsockopt(sockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not set PACKET_TX_RING on AF_PACKET "
+ "socket for %s\n", pair->value);
+ goto error;
+ }
+
+ rx_queue = &((*internals)->rx_queue[0]);
+
+ rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
+ sockfd, 0);
+ if (rx_queue->map == MAP_FAILED) {
+ RTE_LOG(ERR, PMD,
+ "Call to mmap failed on AF_PACKET socket for %s\n",
+ 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(NULL, rdsize, 0, numa_node);
+ for (i = 0; i < req->tp_frame_nr; ++i) {
+ rx_queue->rd[i].iov_base = rx_queue->map + (i * FRAMESIZ);
+ rx_queue->rd[i].iov_len = req->tp_frame_size;
+ }
+
+ tx_queue = &((*internals)->tx_queue[0]);
+
+ tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
+
+ tx_queue->rd = rte_zmalloc_socket(NULL, rdsize, 0, numa_node);
+ for (i = 0; i < req->tp_frame_nr; ++i) {
+ tx_queue->rd[i].iov_base = tx_queue->map + (i * FRAMESIZ);
+ tx_queue->rd[i].iov_len = req->tp_frame_size;
+ }
+
+ 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,
+ "AF_PACKET I/F name too long (%s)\n",
+ pair->value);
+ goto error;
+ }
+ if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
+ RTE_LOG(ERR, PMD,
+ "AF_PACKET ioctl failed (SIOCGIFINDEX)\n");
+ goto error;
+ }
+ (*internals)->if_index = ifr.ifr_ifindex;
+
+ if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
+ RTE_LOG(ERR, PMD,
+ "AF_PACKET ioctl failed (SIOCGIFHWADDR)\n");
+ 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;
+
+ rc = bind(sockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
+ if (rc == -1) {
+ RTE_LOG(ERR, PMD,
+ "Could not bind AF_PACKET socket to %s\n", pair->value);
+ goto error;
+ }
+
+ /* reserve an ethdev entry */
+ *eth_dev = rte_eth_dev_allocate();
+ 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_rx_queues = nb_rx_queues;
+ (*internals)->nb_tx_queues = nb_tx_queues;
+
+ data->dev_private = *internals;
+ data->port_id = (*eth_dev)->data->port_id;
+ data->nb_rx_queues = (uint16_t)nb_rx_queues;
+ data->nb_tx_queues = (uint16_t)nb_tx_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);
+ if ((*internals)->rx_queue[0].rd)
+ rte_free((*internals)->rx_queue[0].rd);
+ if ((*internals)->tx_queue[0].rd)
+ rte_free((*internals)->tx_queue[0].rd);
+ if (*internals)
+ rte_free(*internals);
+ return -1;
+}
+
+static int
+rte_eth_from_packet(int const *sockfd,
+ const unsigned nb_rx_queues,
+ const unsigned nb_tx_queues,
+ const unsigned numa_node,
+ struct rte_kvargs *kvlist)
+{
+ struct pmd_internals *internals = NULL;
+ struct rte_eth_dev *eth_dev = NULL;
+
+ /* do some parameter checking */
+ if (*sockfd < 0)
+ return -1;
+ if (nb_rx_queues < 1 || nb_tx_queues < 1)
+ return -1;
+
+ if (rte_pmd_init_internals(*sockfd,
+ nb_rx_queues, nb_tx_queues,
+ numa_node, &internals,
+ ð_dev, kvlist) < 0)
+ return -1;
+
+ internals->rx_queue->sockfd = *sockfd;
+ internals->tx_queue->sockfd = *sockfd;
+
+ eth_dev->rx_pkt_burst = eth_packet_rx;
+ eth_dev->tx_pkt_burst = eth_packet_tx;
+
+ return 0;
+}
+
+int
+rte_pmd_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_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_PACKET_IFACE_ARG) == 1) {
+
+ ret = rte_kvargs_process(kvlist, ETH_PACKET_IFACE_ARG,
+ &open_packet_iface, &sockfd);
+ if (ret < 0)
+ return -1;
+ }
+
+ ret = rte_eth_from_packet(&sockfd, 1, 1, numa_node, kvlist);
+
+ if (ret < 0) {
+ close(sockfd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static struct rte_driver pmd_packet_drv = {
+ .name = "eth_packet",
+ .type = PMD_VDEV,
+ .init = rte_pmd_packet_devinit,
+};
+
+PMD_REGISTER_DRIVER(pmd_packet_drv);
diff --git a/lib/librte_pmd_packet/rte_eth_packet.h b/lib/librte_pmd_packet/rte_eth_packet.h
new file mode 100644
index 000000000000..957e551c1d28
--- /dev/null
+++ b/lib/librte_pmd_packet/rte_eth_packet.h
@@ -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_PACKET_H_
+#define _RTE_ETH_PACKET_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RTE_ETH_PACKET_PARAM_NAME "eth_packet"
+
+/**
+ * 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_packet_devinit(const char *name, const char *params);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index a8365775f176..e1439712f1d8 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -177,6 +177,10 @@ ifeq ($(CONFIG_RTE_LIBRTE_PMD_PCAP),y)
LDLIBS += -lrte_pmd_pcap -lpcap
endif
+ifeq ($(CONFIG_RTE_LIBRTE_PMD_PACKET),y)
+LDLIBS += -lrte_pmd_packet
+endif
+
endif
LDLIBS += $(EXECENV_LDLIBS)
--
1.9.3
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