--- /dev/null
+/*-
+ * 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);
Code Review / deb_dpdk.git / blobdiff