--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2016 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 <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/eventfd.h>
+
+#include "vhost.h"
+#include "virtio_user_dev.h"
+#include "../virtio_ethdev.h"
+
+static int
+virtio_user_kick_queue(struct virtio_user_dev *dev, uint32_t queue_sel)
+{
+ int callfd, kickfd;
+ struct vhost_vring_file file;
+ struct vhost_vring_state state;
+ struct vring *vring = &dev->vrings[queue_sel];
+ struct vhost_vring_addr addr = {
+ .index = queue_sel,
+ .desc_user_addr = (uint64_t)(uintptr_t)vring->desc,
+ .avail_user_addr = (uint64_t)(uintptr_t)vring->avail,
+ .used_user_addr = (uint64_t)(uintptr_t)vring->used,
+ .log_guest_addr = 0,
+ .flags = 0, /* disable log */
+ };
+
+ /* May use invalid flag, but some backend leverages kickfd and callfd as
+ * criteria to judge if dev is alive. so finally we use real event_fd.
+ */
+ callfd = eventfd(0, O_CLOEXEC | O_NONBLOCK);
+ if (callfd < 0) {
+ PMD_DRV_LOG(ERR, "callfd error, %s\n", strerror(errno));
+ return -1;
+ }
+ kickfd = eventfd(0, O_CLOEXEC | O_NONBLOCK);
+ if (kickfd < 0) {
+ close(callfd);
+ PMD_DRV_LOG(ERR, "kickfd error, %s\n", strerror(errno));
+ return -1;
+ }
+
+ /* Of all per virtqueue MSGs, make sure VHOST_SET_VRING_CALL come
+ * firstly because vhost depends on this msg to allocate virtqueue
+ * pair.
+ */
+ file.index = queue_sel;
+ file.fd = callfd;
+ vhost_user_sock(dev->vhostfd, VHOST_USER_SET_VRING_CALL, &file);
+ dev->callfds[queue_sel] = callfd;
+
+ state.index = queue_sel;
+ state.num = vring->num;
+ vhost_user_sock(dev->vhostfd, VHOST_USER_SET_VRING_NUM, &state);
+
+ state.num = 0; /* no reservation */
+ vhost_user_sock(dev->vhostfd, VHOST_USER_SET_VRING_BASE, &state);
+
+ vhost_user_sock(dev->vhostfd, VHOST_USER_SET_VRING_ADDR, &addr);
+
+ /* Of all per virtqueue MSGs, make sure VHOST_USER_SET_VRING_KICK comes
+ * lastly because vhost depends on this msg to judge if
+ * virtio is ready.
+ */
+ file.fd = kickfd;
+ vhost_user_sock(dev->vhostfd, VHOST_USER_SET_VRING_KICK, &file);
+ dev->kickfds[queue_sel] = kickfd;
+
+ return 0;
+}
+
+int
+virtio_user_start_device(struct virtio_user_dev *dev)
+{
+ uint64_t features;
+ uint32_t i, queue_sel;
+ int ret;
+
+ /* construct memory region inside each implementation */
+ ret = vhost_user_sock(dev->vhostfd, VHOST_USER_SET_MEM_TABLE, NULL);
+ if (ret < 0)
+ goto error;
+
+ for (i = 0; i < dev->max_queue_pairs; ++i) {
+ queue_sel = 2 * i + VTNET_SQ_RQ_QUEUE_IDX;
+ if (virtio_user_kick_queue(dev, queue_sel) < 0) {
+ PMD_DRV_LOG(INFO, "kick rx vq fails: %u", i);
+ goto error;
+ }
+ }
+ for (i = 0; i < dev->max_queue_pairs; ++i) {
+ queue_sel = 2 * i + VTNET_SQ_TQ_QUEUE_IDX;
+ if (virtio_user_kick_queue(dev, queue_sel) < 0) {
+ PMD_DRV_LOG(INFO, "kick tx vq fails: %u", i);
+ goto error;
+ }
+ }
+
+ /* After setup all virtqueues, we need to set_features so that
+ * these features can be set into each virtqueue in vhost side.
+ * And before that, make sure VIRTIO_NET_F_MAC is stripped.
+ */
+ features = dev->features;
+ features &= ~(1ull << VIRTIO_NET_F_MAC);
+ ret = vhost_user_sock(dev->vhostfd, VHOST_USER_SET_FEATURES, &features);
+ if (ret < 0)
+ goto error;
+ PMD_DRV_LOG(INFO, "set features: %" PRIx64, features);
+
+ return 0;
+error:
+ /* TODO: free resource here or caller to check */
+ return -1;
+}
+
+int virtio_user_stop_device(struct virtio_user_dev *dev)
+{
+ return vhost_user_sock(dev->vhostfd, VHOST_USER_RESET_OWNER, NULL);
+}
+
+static inline void
+parse_mac(struct virtio_user_dev *dev, const char *mac)
+{
+ int i, r;
+ uint32_t tmp[ETHER_ADDR_LEN];
+
+ if (!mac)
+ return;
+
+ r = sscanf(mac, "%x:%x:%x:%x:%x:%x", &tmp[0],
+ &tmp[1], &tmp[2], &tmp[3], &tmp[4], &tmp[5]);
+ if (r == ETHER_ADDR_LEN) {
+ for (i = 0; i < ETHER_ADDR_LEN; ++i)
+ dev->mac_addr[i] = (uint8_t)tmp[i];
+ dev->mac_specified = 1;
+ } else {
+ /* ignore the wrong mac, use random mac */
+ PMD_DRV_LOG(ERR, "wrong format of mac: %s", mac);
+ }
+}
+
+int
+virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
+ int cq, int queue_size, const char *mac)
+{
+ strncpy(dev->path, path, PATH_MAX);
+ dev->max_queue_pairs = queues;
+ dev->queue_pairs = 1; /* mq disabled by default */
+ dev->queue_size = queue_size;
+ dev->mac_specified = 0;
+ parse_mac(dev, mac);
+ dev->vhostfd = -1;
+ /* TODO: cq */
+ RTE_SET_USED(cq);
+
+ dev->vhostfd = vhost_user_setup(dev->path);
+ if (dev->vhostfd < 0) {
+ PMD_INIT_LOG(ERR, "backend set up fails");
+ return -1;
+ }
+ if (vhost_user_sock(dev->vhostfd, VHOST_USER_SET_OWNER, NULL) < 0) {
+ PMD_INIT_LOG(ERR, "set_owner fails: %s", strerror(errno));
+ return -1;
+ }
+
+ if (vhost_user_sock(dev->vhostfd, VHOST_USER_GET_FEATURES,
+ &dev->features) < 0) {
+ PMD_INIT_LOG(ERR, "get_features failed: %s", strerror(errno));
+ return -1;
+ }
+ if (dev->mac_specified)
+ dev->features |= (1ull << VIRTIO_NET_F_MAC);
+ /* disable it until we support CQ */
+ dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ);
+ dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_RX);
+
+ return 0;
+}
+
+void
+virtio_user_dev_uninit(struct virtio_user_dev *dev)
+{
+ uint32_t i;
+
+ for (i = 0; i < dev->max_queue_pairs * 2; ++i) {
+ close(dev->callfds[i]);
+ close(dev->kickfds[i]);
+ }
+
+ close(dev->vhostfd);
+}
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2016 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 _VIRTIO_USER_DEV_H
+#define _VIRTIO_USER_DEV_H
+
+#include <limits.h>
+#include "../virtio_pci.h"
+#include "../virtio_ring.h"
+
+struct virtio_user_dev {
+ int vhostfd;
+ int callfds[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
+ int kickfds[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
+ int mac_specified;
+ uint32_t max_queue_pairs;
+ uint32_t queue_pairs;
+ uint32_t queue_size;
+ uint64_t features;
+ uint8_t status;
+ uint8_t mac_addr[ETHER_ADDR_LEN];
+ char path[PATH_MAX];
+ struct vring vrings[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
+};
+
+int virtio_user_start_device(struct virtio_user_dev *dev);
+int virtio_user_stop_device(struct virtio_user_dev *dev);
+int virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
+ int cq, int queue_size, const char *mac);
+void virtio_user_dev_uninit(struct virtio_user_dev *dev);
+
+#endif
git.droids-corp.org / dpdk.git / commitdiff