diff options
author | C.J. Collier <cjcollier@linuxfoundation.org> | 2016-06-14 07:50:17 -0700 |
---|---|---|
committer | C.J. Collier <cjcollier@linuxfoundation.org> | 2016-06-14 12:17:54 -0700 |
commit | 97f17497d162afdb82c8704bf097f0fee3724b2e (patch) | |
tree | 1c6269614c0c15ffef8451c58ae8f8b30a1bc804 /drivers/net/xenvirt/rte_eth_xenvirt.c | |
parent | e04be89c2409570e0055b2cda60bd11395bb93b0 (diff) |
Imported Upstream version 16.04
Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>
Diffstat (limited to 'drivers/net/xenvirt/rte_eth_xenvirt.c')
-rw-r--r-- | drivers/net/xenvirt/rte_eth_xenvirt.c | 778 |
1 files changed, 778 insertions, 0 deletions
diff --git a/drivers/net/xenvirt/rte_eth_xenvirt.c b/drivers/net/xenvirt/rte_eth_xenvirt.c new file mode 100644 index 00000000..b9638d96 --- /dev/null +++ b/drivers/net/xenvirt/rte_eth_xenvirt.c @@ -0,0 +1,778 @@ +/*- + * 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> +#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_dev.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 inline struct rte_mbuf * +rte_rxmbuf_alloc(struct rte_mempool *mp) +{ + struct rte_mbuf *m; + + m = __rte_mbuf_raw_alloc(mp); + __rte_mbuf_sanity_check_raw(m, 0); + + return m; +} + + +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_rxmbuf_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_rxmbuf_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, RTE_ETH_DEV_VIRTUAL); + 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_driver pmd_xenvirt_drv = { + .name = "eth_xenvirt", + .type = PMD_VDEV, + .init = rte_pmd_xenvirt_devinit, + .uninit = rte_pmd_xenvirt_devuninit, +}; + +PMD_REGISTER_DRIVER(pmd_xenvirt_drv); |