numam-dpdk/drivers/net/xenvirt/rte_eth_xenvirt.c
Jan Viktorin 2695c6df69 eal: remove unused PMD types
- All devices register themselfs by calling a kind of DRIVER_REGISTER_XXX.
  The PMD_REGISTER_DRIVER is not used anymore.
- PMD_VDEV type is also not being used - can be removed from all VDEVs.

Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
Acked-by: David Marchand <david.marchand@6wind.com>
2016-10-03 16:33:51 +02:00

770 lines
20 KiB
C

/*-
* BSD LICENSE
*
* Copyright(c) 2010-2015 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.
*/
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <errno.h>
#include <sys/user.h>
#ifndef PAGE_SIZE
#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#endif
#include <linux/binfmts.h>
#include <xen/xen-compat.h>
#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
#include <xs.h>
#else
#include <xenstore.h>
#endif
#include <linux/virtio_ring.h>
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>
#include <rte_string_fns.h>
#include <rte_vdev.h>
#include <cmdline_parse.h>
#include <cmdline_parse_etheraddr.h>
#include "rte_xen_lib.h"
#include "virtqueue.h"
#include "rte_eth_xenvirt.h"
#define VQ_DESC_NUM 256
#define VIRTIO_MBUF_BURST_SZ 64
/* virtio_idx is increased after new device is created.*/
static int virtio_idx = 0;
static const char *drivername = "xen virtio PMD";
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_SPEED_FIXED
};
static void
eth_xenvirt_free_queues(struct rte_eth_dev *dev);
static uint16_t
eth_xenvirt_rx(void *q, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
struct virtqueue *rxvq = q;
struct rte_mbuf *rxm, *new_mbuf;
uint16_t nb_used, num;
uint32_t len[VIRTIO_MBUF_BURST_SZ];
uint32_t i;
struct pmd_internals *pi = rxvq->internals;
nb_used = VIRTQUEUE_NUSED(rxvq);
rte_smp_rmb();
num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ) ? num : VIRTIO_MBUF_BURST_SZ);
if (unlikely(num == 0)) return 0;
num = virtqueue_dequeue_burst(rxvq, rx_pkts, len, num);
PMD_RX_LOG(DEBUG, "used:%d dequeue:%d\n", nb_used, num);
for (i = 0; i < num ; i ++) {
rxm = rx_pkts[i];
PMD_RX_LOG(DEBUG, "packet len:%d\n", len[i]);
rxm->next = NULL;
rxm->data_off = RTE_PKTMBUF_HEADROOM;
rxm->data_len = (uint16_t)(len[i] - sizeof(struct virtio_net_hdr));
rxm->nb_segs = 1;
rxm->port = pi->port_id;
rxm->pkt_len = (uint32_t)(len[i] - sizeof(struct virtio_net_hdr));
}
/* allocate new mbuf for the used descriptor */
while (likely(!virtqueue_full(rxvq))) {
new_mbuf = rte_mbuf_raw_alloc(rxvq->mpool);
if (unlikely(new_mbuf == NULL)) {
break;
}
if (unlikely(virtqueue_enqueue_recv_refill(rxvq, new_mbuf))) {
rte_pktmbuf_free_seg(new_mbuf);
break;
}
}
pi->eth_stats.ipackets += num;
return num;
}
static uint16_t
eth_xenvirt_tx(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
struct virtqueue *txvq = tx_queue;
struct rte_mbuf *txm;
uint16_t nb_used, nb_tx, num, i;
int error;
uint32_t len[VIRTIO_MBUF_BURST_SZ];
struct rte_mbuf *snd_pkts[VIRTIO_MBUF_BURST_SZ];
struct pmd_internals *pi = txvq->internals;
nb_tx = 0;
if (unlikely(nb_pkts == 0))
return 0;
PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
nb_used = VIRTQUEUE_NUSED(txvq);
rte_smp_rmb();
num = (uint16_t)(likely(nb_used <= VIRTIO_MBUF_BURST_SZ) ? nb_used : VIRTIO_MBUF_BURST_SZ);
num = virtqueue_dequeue_burst(txvq, snd_pkts, len, num);
for (i = 0; i < num ; i ++) {
/* mergable not supported, one segment only */
rte_pktmbuf_free_seg(snd_pkts[i]);
}
while (nb_tx < nb_pkts) {
if (likely(!virtqueue_full(txvq))) {
/* TODO drop tx_pkts if it contains multiple segments */
txm = tx_pkts[nb_tx];
error = virtqueue_enqueue_xmit(txvq, txm);
if (unlikely(error)) {
if (error == ENOSPC)
PMD_TX_LOG(ERR, "virtqueue_enqueue Free count = 0\n");
else if (error == EMSGSIZE)
PMD_TX_LOG(ERR, "virtqueue_enqueue Free count < 1\n");
else
PMD_TX_LOG(ERR, "virtqueue_enqueue error: %d\n", error);
break;
}
nb_tx++;
} else {
PMD_TX_LOG(ERR, "No free tx descriptors to transmit\n");
/* virtqueue_notify not needed in our para-virt solution */
break;
}
}
pi->eth_stats.opackets += nb_tx;
return nb_tx;
}
static int
eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
{
RTE_LOG(ERR, PMD, "%s\n", __func__);
return 0;
}
/*
* Create a shared page between guest and host.
* Host monitors this page if it is cleared on unmap, and then
* do necessary clean up.
*/
static void
gntalloc_vring_flag(int vtidx)
{
char key_str[PATH_MAX];
char val_str[PATH_MAX];
uint32_t gref_tmp;
void *ptr;
if (grefwatch_from_alloc(&gref_tmp, &ptr)) {
RTE_LOG(ERR, PMD, "grefwatch_from_alloc error\n");
exit(0);
}
*(uint8_t *)ptr = MAP_FLAG;
snprintf(val_str, sizeof(val_str), "%u", gref_tmp);
snprintf(key_str, sizeof(key_str),
DPDK_XENSTORE_PATH"%d"VRING_FLAG_STR, vtidx);
xenstore_write(key_str, val_str);
}
/*
* Notify host this virtio device is started.
* Host could start polling this device.
*/
static void
dev_start_notify(int vtidx)
{
char key_str[PATH_MAX];
char val_str[PATH_MAX];
RTE_LOG(INFO, PMD, "%s: virtio %d is started\n", __func__, vtidx);
gntalloc_vring_flag(vtidx);
snprintf(key_str, sizeof(key_str), "%s%s%d",
DPDK_XENSTORE_PATH, EVENT_TYPE_START_STR,
vtidx);
snprintf(val_str, sizeof(val_str), "1");
xenstore_write(key_str, val_str);
}
/*
* Notify host this virtio device is stopped.
* Host could stop polling this device.
*/
static void
dev_stop_notify(int vtidx)
{
RTE_SET_USED(vtidx);
}
static int
update_mac_address(struct ether_addr *mac_addrs, int vtidx)
{
char key_str[PATH_MAX];
char val_str[PATH_MAX];
int rv;
if (mac_addrs == NULL) {
RTE_LOG(ERR, PMD, "%s: NULL pointer mac specified\n", __func__);
return -1;
}
rv = snprintf(key_str, sizeof(key_str),
DPDK_XENSTORE_PATH"%d_ether_addr", vtidx);
if (rv == -1)
return rv;
rv = snprintf(val_str, sizeof(val_str), "%02x:%02x:%02x:%02x:%02x:%02x",
mac_addrs->addr_bytes[0],
mac_addrs->addr_bytes[1],
mac_addrs->addr_bytes[2],
mac_addrs->addr_bytes[3],
mac_addrs->addr_bytes[4],
mac_addrs->addr_bytes[5]);
if (rv == -1)
return rv;
if (xenstore_write(key_str, val_str))
return rv;
return 0;
}
static int
eth_dev_start(struct rte_eth_dev *dev)
{
struct virtqueue *rxvq = dev->data->rx_queues[0];
struct virtqueue *txvq = dev->data->tx_queues[0];
struct rte_mbuf *m;
struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
int rv;
dev->data->dev_link.link_status = ETH_LINK_UP;
while (!virtqueue_full(rxvq)) {
m = rte_mbuf_raw_alloc(rxvq->mpool);
if (m == NULL)
break;
/* Enqueue allocated buffers. */
if (virtqueue_enqueue_recv_refill(rxvq, m)) {
rte_pktmbuf_free_seg(m);
break;
}
}
rxvq->internals = pi;
txvq->internals = pi;
rv = update_mac_address(dev->data->mac_addrs, pi->virtio_idx);
if (rv)
return -1;
dev_start_notify(pi->virtio_idx);
return 0;
}
static void
eth_dev_stop(struct rte_eth_dev *dev)
{
struct pmd_internals *pi = (struct pmd_internals *)dev->data->dev_private;
dev->data->dev_link.link_status = ETH_LINK_DOWN;
dev_stop_notify(pi->virtio_idx);
}
/*
* Notify host this virtio device is closed.
* Host could do necessary clean up to this device.
*/
static void
eth_dev_close(struct rte_eth_dev *dev)
{
eth_xenvirt_free_queues(dev);
}
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;
RTE_SET_USED(internals);
dev_info->driver_name = drivername;
dev_info->max_mac_addrs = 1;
dev_info->max_rx_pktlen = (uint32_t)2048;
dev_info->max_rx_queues = (uint16_t)1;
dev_info->max_tx_queues = (uint16_t)1;
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 *stats)
{
struct pmd_internals *internals = dev->data->dev_private;
if(stats)
rte_memcpy(stats, &internals->eth_stats, sizeof(*stats));
}
static void
eth_stats_reset(struct rte_eth_dev *dev)
{
struct pmd_internals *internals = dev->data->dev_private;
/* Reset software totals */
memset(&internals->eth_stats, 0, sizeof(internals->eth_stats));
}
static void
eth_queue_release(void *q)
{
rte_free(q);
}
static int
eth_link_update(struct rte_eth_dev *dev __rte_unused,
int wait_to_complete __rte_unused)
{
return 0;
}
/*
* Create shared vring between guest and host.
* Memory is allocated through grant alloc driver, so it is not physical continuous.
*/
static void *
gntalloc_vring_create(int queue_type, uint32_t size, int vtidx)
{
char key_str[PATH_MAX] = {0};
char val_str[PATH_MAX] = {0};
void *va = NULL;
int pg_size;
uint32_t pg_num;
uint32_t *gref_arr = NULL;
phys_addr_t *pa_arr = NULL;
uint64_t start_index;
int rv;
pg_size = getpagesize();
size = RTE_ALIGN_CEIL(size, pg_size);
pg_num = size / pg_size;
gref_arr = calloc(pg_num, sizeof(gref_arr[0]));
pa_arr = calloc(pg_num, sizeof(pa_arr[0]));
if (gref_arr == NULL || pa_arr == NULL) {
RTE_LOG(ERR, PMD, "%s: calloc failed\n", __func__);
goto out;
}
va = gntalloc(size, gref_arr, &start_index);
if (va == NULL) {
RTE_LOG(ERR, PMD, "%s: gntalloc failed\n", __func__);
goto out;
}
if (get_phys_map(va, pa_arr, pg_num, pg_size))
goto out;
/* write in xenstore gref and pfn for each page of vring */
if (grant_node_create(pg_num, gref_arr, pa_arr, val_str, sizeof(val_str))) {
gntfree(va, size, start_index);
va = NULL;
goto out;
}
if (queue_type == VTNET_RQ)
rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"RXVRING_XENSTORE_STR, vtidx);
else
rv = snprintf(key_str, sizeof(key_str), DPDK_XENSTORE_PATH"%d"TXVRING_XENSTORE_STR, vtidx);
if (rv == -1 || xenstore_write(key_str, val_str) == -1) {
gntfree(va, size, start_index);
va = NULL;
}
out:
free(pa_arr);
free(gref_arr);
return va;
}
static struct virtqueue *
virtio_queue_setup(struct rte_eth_dev *dev, int queue_type)
{
struct virtqueue *vq = NULL;
uint16_t vq_size = VQ_DESC_NUM;
int i = 0;
char vq_name[VIRTQUEUE_MAX_NAME_SZ];
size_t size;
struct vring *vr;
/* Allocate memory for virtqueue. */
if (queue_type == VTNET_RQ) {
snprintf(vq_name, sizeof(vq_name), "port%d_rvq",
dev->data->port_id);
vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
if (vq == NULL) {
RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
return NULL;
}
memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
} else if(queue_type == VTNET_TQ) {
snprintf(vq_name, sizeof(vq_name), "port%d_tvq",
dev->data->port_id);
vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
if (vq == NULL) {
RTE_LOG(ERR, PMD, "%s: unabled to allocate virtqueue\n", __func__);
return NULL;
}
memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
}
memcpy(vq->vq_name, vq_name, sizeof(vq->vq_name));
vq->vq_alignment = VIRTIO_PCI_VRING_ALIGN;
vq->vq_nentries = vq_size;
vq->vq_free_cnt = vq_size;
/* Calcuate vring size according to virtio spec */
size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
/* Allocate memory for virtio vring through gntalloc driver*/
vq->vq_ring_virt_mem = gntalloc_vring_create(queue_type, vq->vq_ring_size,
((struct pmd_internals *)dev->data->dev_private)->virtio_idx);
memset(vq->vq_ring_virt_mem, 0, vq->vq_ring_size);
vr = &vq->vq_ring;
vring_init(vr, vq_size, vq->vq_ring_virt_mem, vq->vq_alignment);
/*
* Locally maintained last consumed index, this idex trails
* vq_ring.used->idx.
*/
vq->vq_used_cons_idx = 0;
vq->vq_desc_head_idx = 0;
vq->vq_free_cnt = vq->vq_nentries;
memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
/* Chain all the descriptors in the ring with an END */
for (i = 0; i < vq_size - 1; i++)
vr->desc[i].next = (uint16_t)(i + 1);
vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
return vq;
}
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 virtqueue *vq;
vq = dev->data->rx_queues[rx_queue_id] = virtio_queue_setup(dev, VTNET_RQ);
vq->mpool = mb_pool;
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)
{
dev->data->tx_queues[tx_queue_id] = virtio_queue_setup(dev, VTNET_TQ);
return 0;
}
static void
eth_xenvirt_free_queues(struct rte_eth_dev *dev)
{
int i;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
eth_queue_release(dev->data->rx_queues[i]);
dev->data->rx_queues[i] = NULL;
}
dev->data->nb_rx_queues = 0;
for (i = 0; i < dev->data->nb_tx_queues; i++) {
eth_queue_release(dev->data->tx_queues[i]);
dev->data->tx_queues[i] = NULL;
}
dev->data->nb_tx_queues = 0;
}
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,
.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,
};
static int
rte_eth_xenvirt_parse_args(struct xenvirt_dict *dict,
const char *name, const char *params)
{
int i;
char *pairs[RTE_ETH_XENVIRT_MAX_ARGS];
int num_of_pairs;
char *pair[2];
char *args;
int ret = -1;
if (params == NULL)
return 0;
args = rte_zmalloc(NULL, strlen(params) + 1, RTE_CACHE_LINE_SIZE);
if (args == NULL) {
RTE_LOG(ERR, PMD, "Couldn't parse %s device \n", name);
return -1;
}
rte_memcpy(args, params, strlen(params));
num_of_pairs = rte_strsplit(args, strnlen(args, MAX_ARG_STRLEN),
pairs,
RTE_ETH_XENVIRT_MAX_ARGS ,
RTE_ETH_XENVIRT_PAIRS_DELIM);
for (i = 0; i < num_of_pairs; i++) {
pair[0] = NULL;
pair[1] = NULL;
rte_strsplit(pairs[i], strnlen(pairs[i], MAX_ARG_STRLEN),
pair, 2,
RTE_ETH_XENVIRT_KEY_VALUE_DELIM);
if (pair[0] == NULL || pair[1] == NULL || pair[0][0] == 0
|| pair[1][0] == 0) {
RTE_LOG(ERR, PMD,
"Couldn't parse %s device,"
"wrong key or value \n", name);
goto err;
}
if (!strncmp(pair[0], RTE_ETH_XENVIRT_MAC_PARAM,
sizeof(RTE_ETH_XENVIRT_MAC_PARAM))) {
if (cmdline_parse_etheraddr(NULL,
pair[1],
&dict->addr,
sizeof(dict->addr)) < 0) {
RTE_LOG(ERR, PMD,
"Invalid %s device ether address\n",
name);
goto err;
}
dict->addr_valid = 1;
}
}
ret = 0;
err:
rte_free(args);
return ret;
}
enum dev_action {
DEV_CREATE,
DEV_ATTACH
};
static int
eth_dev_xenvirt_create(const char *name, const char *params,
const unsigned numa_node,
enum dev_action action)
{
struct rte_eth_dev_data *data = NULL;
struct pmd_internals *internals = NULL;
struct rte_eth_dev *eth_dev = NULL;
struct xenvirt_dict dict;
memset(&dict, 0, sizeof(struct xenvirt_dict));
RTE_LOG(INFO, PMD, "Creating virtio rings backed ethdev on numa socket %u\n",
numa_node);
RTE_SET_USED(action);
if (rte_eth_xenvirt_parse_args(&dict, name, params) < 0) {
RTE_LOG(ERR, PMD, "%s: Failed to parse ethdev parameters\n", __func__);
return -1;
}
/* 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 err;
internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
if (internals == NULL)
goto err;
/* reserve an ethdev entry */
eth_dev = rte_eth_dev_allocate(name);
if (eth_dev == NULL)
goto err;
data->dev_private = internals;
data->port_id = eth_dev->data->port_id;
data->nb_rx_queues = (uint16_t)1;
data->nb_tx_queues = (uint16_t)1;
data->dev_link = pmd_link;
data->mac_addrs = rte_zmalloc("xen_virtio", ETHER_ADDR_LEN, 0);
if(dict.addr_valid)
memcpy(&data->mac_addrs->addr_bytes, &dict.addr, sizeof(struct ether_addr));
else
eth_random_addr(&data->mac_addrs->addr_bytes[0]);
eth_dev->data = data;
eth_dev->dev_ops = &ops;
eth_dev->data->dev_flags = RTE_PCI_DRV_DETACHABLE;
eth_dev->data->kdrv = RTE_KDRV_NONE;
eth_dev->data->drv_name = drivername;
eth_dev->driver = NULL;
eth_dev->data->numa_node = numa_node;
eth_dev->rx_pkt_burst = eth_xenvirt_rx;
eth_dev->tx_pkt_burst = eth_xenvirt_tx;
internals->virtio_idx = virtio_idx++;
internals->port_id = eth_dev->data->port_id;
return 0;
err:
rte_free(data);
rte_free(internals);
return -1;
}
static int
eth_dev_xenvirt_free(const char *name, const unsigned numa_node)
{
struct rte_eth_dev *eth_dev = NULL;
RTE_LOG(DEBUG, PMD,
"Free virtio rings backed ethdev on numa socket %u\n",
numa_node);
/* find an ethdev entry */
eth_dev = rte_eth_dev_allocated(name);
if (eth_dev == NULL)
return -1;
if (eth_dev->data->dev_started == 1) {
eth_dev_stop(eth_dev);
eth_dev_close(eth_dev);
}
eth_dev->rx_pkt_burst = NULL;
eth_dev->tx_pkt_burst = NULL;
eth_dev->dev_ops = NULL;
rte_free(eth_dev->data);
rte_free(eth_dev->data->dev_private);
rte_free(eth_dev->data->mac_addrs);
virtio_idx--;
return 0;
}
/*TODO: Support multiple process model */
static int
rte_pmd_xenvirt_devinit(const char *name, const char *params)
{
if (virtio_idx == 0) {
if (xenstore_init() != 0) {
RTE_LOG(ERR, PMD, "%s: xenstore init failed\n", __func__);
return -1;
}
if (gntalloc_open() != 0) {
RTE_LOG(ERR, PMD, "%s: grant init failed\n", __func__);
return -1;
}
}
eth_dev_xenvirt_create(name, params, rte_socket_id(), DEV_CREATE);
return 0;
}
static int
rte_pmd_xenvirt_devuninit(const char *name)
{
eth_dev_xenvirt_free(name, rte_socket_id());
if (virtio_idx == 0) {
if (xenstore_uninit() != 0)
RTE_LOG(ERR, PMD, "%s: xenstore uninit failed\n", __func__);
gntalloc_close();
}
return 0;
}
static struct rte_vdev_driver pmd_xenvirt_drv = {
.init = rte_pmd_xenvirt_devinit,
.uninit = rte_pmd_xenvirt_devuninit,
};
DRIVER_REGISTER_VDEV(net_xenvirt, pmd_xenvirt_drv);
DRIVER_REGISTER_PARAM_STRING(net_xenvirt,
"mac=<mac addr>");