2017-05-30 21:13:50 +00:00
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/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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2017-10-18 17:14:30 +00:00
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#include "spdk/stdinc.h"
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2017-09-20 15:50:08 +00:00
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#include <sys/eventfd.h>
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2017-05-30 21:13:50 +00:00
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#include <linux/virtio_scsi.h>
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2017-11-15 13:52:32 +00:00
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#include <rte_config.h>
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2017-05-30 21:13:50 +00:00
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#include <rte_malloc.h>
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#include <rte_alarm.h>
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2017-11-03 12:22:50 +00:00
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#include "virtio_user/vhost.h"
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2017-10-16 21:46:01 +00:00
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#include "spdk/string.h"
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2019-03-17 13:20:05 +00:00
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#include "spdk/config.h"
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2017-10-16 21:46:01 +00:00
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2017-11-20 12:17:52 +00:00
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#include "spdk_internal/virtio.h"
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2018-07-02 10:43:05 +00:00
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#define VIRTIO_USER_SUPPORTED_PROTOCOL_FEATURES \
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2018-07-02 11:24:43 +00:00
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((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
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(1ULL << VHOST_USER_PROTOCOL_F_CONFIG))
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2018-07-02 10:43:05 +00:00
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2017-11-03 11:44:41 +00:00
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static int
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virtio_user_create_queue(struct virtio_dev *vdev, uint32_t queue_sel)
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{
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2017-11-03 14:39:45 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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2017-11-03 11:44:41 +00:00
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/* Of all per virtqueue MSGs, make sure VHOST_SET_VRING_CALL come
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* firstly because vhost depends on this msg to allocate virtqueue
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* pair.
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*/
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struct vhost_vring_file file;
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file.index = queue_sel;
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file.fd = dev->callfds[queue_sel];
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2018-03-30 18:17:23 +00:00
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return dev->ops->send_request(dev, VHOST_USER_SET_VRING_CALL, &file);
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2017-11-03 11:44:41 +00:00
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}
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static int
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2019-01-07 21:26:14 +00:00
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virtio_user_set_vring_addr(struct virtio_dev *vdev, uint32_t queue_sel)
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2017-11-03 11:44:41 +00:00
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{
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2017-11-03 14:39:45 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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2017-11-03 11:44:41 +00:00
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struct vring *vring = &dev->vrings[queue_sel];
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struct vhost_vring_addr addr = {
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.index = queue_sel,
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.desc_user_addr = (uint64_t)(uintptr_t)vring->desc,
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.avail_user_addr = (uint64_t)(uintptr_t)vring->avail,
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.used_user_addr = (uint64_t)(uintptr_t)vring->used,
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.log_guest_addr = 0,
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.flags = 0, /* disable log */
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};
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2019-01-07 21:26:14 +00:00
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return dev->ops->send_request(dev, VHOST_USER_SET_VRING_ADDR, &addr);
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}
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static int
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virtio_user_kick_queue(struct virtio_dev *vdev, uint32_t queue_sel)
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{
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struct virtio_user_dev *dev = vdev->ctx;
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struct vhost_vring_file file;
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struct vhost_vring_state state;
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struct vring *vring = &dev->vrings[queue_sel];
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2018-03-30 18:17:23 +00:00
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int rc;
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2017-11-03 11:44:41 +00:00
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state.index = queue_sel;
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state.num = vring->num;
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2018-03-30 18:17:23 +00:00
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rc = dev->ops->send_request(dev, VHOST_USER_SET_VRING_NUM, &state);
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if (rc < 0) {
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return rc;
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}
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2017-11-03 11:44:41 +00:00
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state.index = queue_sel;
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state.num = 0; /* no reservation */
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2018-03-30 18:17:23 +00:00
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rc = dev->ops->send_request(dev, VHOST_USER_SET_VRING_BASE, &state);
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if (rc < 0) {
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return rc;
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}
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2017-11-03 11:44:41 +00:00
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2019-01-07 21:26:14 +00:00
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virtio_user_set_vring_addr(vdev, queue_sel);
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2017-11-03 11:44:41 +00:00
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/* Of all per virtqueue MSGs, make sure VHOST_USER_SET_VRING_KICK comes
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* lastly because vhost depends on this msg to judge if
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* virtio is ready.
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*/
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file.index = queue_sel;
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file.fd = dev->kickfds[queue_sel];
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2018-03-30 18:17:23 +00:00
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return dev->ops->send_request(dev, VHOST_USER_SET_VRING_KICK, &file);
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2017-11-03 11:44:41 +00:00
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}
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static int
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virtio_user_stop_queue(struct virtio_dev *vdev, uint32_t queue_sel)
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{
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2017-11-03 14:39:45 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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2017-11-03 11:44:41 +00:00
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struct vhost_vring_state state;
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state.index = queue_sel;
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state.num = 0;
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2018-03-30 18:17:23 +00:00
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return dev->ops->send_request(dev, VHOST_USER_GET_VRING_BASE, &state);
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2017-11-03 11:44:41 +00:00
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}
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static int
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virtio_user_queue_setup(struct virtio_dev *vdev,
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int (*fn)(struct virtio_dev *, uint32_t))
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{
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uint32_t i;
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2018-07-11 16:54:35 +00:00
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int rc;
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2017-11-03 11:44:41 +00:00
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for (i = 0; i < vdev->max_queues; ++i) {
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2018-07-11 16:54:35 +00:00
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rc = fn(vdev, i);
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if (rc < 0) {
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2017-11-03 11:44:41 +00:00
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SPDK_ERRLOG("setup tx vq fails: %"PRIu32".\n", i);
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2018-07-11 16:54:35 +00:00
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return rc;
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2017-11-03 11:44:41 +00:00
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}
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}
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return 0;
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}
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2018-08-16 16:10:18 +00:00
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static int
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virtio_user_map_notify(void *cb_ctx, struct spdk_mem_map *map,
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enum spdk_mem_map_notify_action action,
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void *vaddr, size_t size)
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{
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struct virtio_dev *vdev = cb_ctx;
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struct virtio_user_dev *dev = vdev->ctx;
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uint64_t features;
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int ret;
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/* We have to resend all mappings anyway, so don't bother with any
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* page tracking.
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*/
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ret = dev->ops->send_request(dev, VHOST_USER_SET_MEM_TABLE, NULL);
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if (ret < 0) {
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return ret;
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}
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2019-02-25 08:55:59 +00:00
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#ifdef SPDK_CONFIG_VHOST_INTERNAL_LIB
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/* Our internal rte_vhost lib requires SET_VRING_ADDR to flush a pending
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* SET_MEM_TABLE. On the other hand, the upstream rte_vhost will invalidate
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* the entire queue upon receiving SET_VRING_ADDR message, so we mustn't
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* send it here. Both behaviors are strictly implementation specific, but
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* this message isn't needed from the point of the spec, so send it only
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* if vhost is compiled with our internal lib.
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2018-08-16 16:10:18 +00:00
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*/
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2019-01-07 21:26:14 +00:00
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ret = virtio_user_queue_setup(vdev, virtio_user_set_vring_addr);
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2018-08-16 16:10:18 +00:00
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if (ret < 0) {
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return ret;
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}
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2019-02-25 08:55:59 +00:00
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#endif
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2018-08-16 16:10:18 +00:00
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/* Since we might want to use that mapping straight away, we have to
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* make sure the guest has already processed our SET_MEM_TABLE message.
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* F_REPLY_ACK is just a feature and the host is not obliged to
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* support it, so we send a simple message that always has a response
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* and we wait for that response. Messages are always processed in order.
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*/
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return dev->ops->send_request(dev, VHOST_USER_GET_FEATURES, &features);
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}
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static int
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virtio_user_register_mem(struct virtio_dev *vdev)
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{
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struct virtio_user_dev *dev = vdev->ctx;
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const struct spdk_mem_map_ops virtio_user_map_ops = {
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.notify_cb = virtio_user_map_notify,
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.are_contiguous = NULL
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};
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dev->mem_map = spdk_mem_map_alloc(0, &virtio_user_map_ops, vdev);
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if (dev->mem_map == NULL) {
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SPDK_ERRLOG("spdk_mem_map_alloc() failed\n");
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return -1;
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}
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return 0;
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}
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static void
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virtio_user_unregister_mem(struct virtio_dev *vdev)
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{
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struct virtio_user_dev *dev = vdev->ctx;
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spdk_mem_map_free(&dev->mem_map);
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}
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2017-11-03 11:44:41 +00:00
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static int
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virtio_user_start_device(struct virtio_dev *vdev)
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{
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2017-11-03 14:39:45 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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2017-12-27 14:51:17 +00:00
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uint64_t host_max_queues;
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2017-11-03 11:44:41 +00:00
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int ret;
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2018-07-02 10:54:11 +00:00
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if ((dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) == 0 &&
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vdev->max_queues > 1 + vdev->fixed_queues_num) {
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SPDK_WARNLOG("%s: requested %"PRIu16" request queues, but the "
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"host doesn't support VHOST_USER_PROTOCOL_F_MQ. "
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"Only one request queue will be used.\n",
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vdev->name, vdev->max_queues - vdev->fixed_queues_num);
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vdev->max_queues = 1 + vdev->fixed_queues_num;
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}
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2017-12-27 14:51:17 +00:00
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/* negotiate the number of I/O queues. */
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ret = dev->ops->send_request(dev, VHOST_USER_GET_QUEUE_NUM, &host_max_queues);
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if (ret < 0) {
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2018-07-11 16:54:35 +00:00
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return ret;
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2017-12-27 14:51:17 +00:00
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}
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if (vdev->max_queues > host_max_queues + vdev->fixed_queues_num) {
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SPDK_WARNLOG("%s: requested %"PRIu16" request queues"
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"but only %"PRIu64" available\n",
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vdev->name, vdev->max_queues - vdev->fixed_queues_num,
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host_max_queues);
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vdev->max_queues = host_max_queues;
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}
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2017-11-03 11:44:41 +00:00
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/* tell vhost to create queues */
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2018-07-11 16:54:35 +00:00
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ret = virtio_user_queue_setup(vdev, virtio_user_create_queue);
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if (ret < 0) {
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return ret;
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2017-12-07 23:23:48 +00:00
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}
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2017-11-03 11:44:41 +00:00
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2018-08-16 16:10:18 +00:00
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ret = virtio_user_register_mem(vdev);
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2018-07-11 16:54:35 +00:00
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if (ret < 0) {
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return ret;
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2017-12-07 23:23:48 +00:00
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}
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2017-11-03 11:44:41 +00:00
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2019-01-07 21:26:14 +00:00
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return virtio_user_queue_setup(vdev, virtio_user_kick_queue);
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2017-11-03 11:44:41 +00:00
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}
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2018-08-16 16:10:18 +00:00
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static int
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virtio_user_stop_device(struct virtio_dev *vdev)
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2017-11-03 11:44:41 +00:00
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{
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2018-08-16 16:10:18 +00:00
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int ret;
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ret = virtio_user_queue_setup(vdev, virtio_user_stop_queue);
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/* a queue might fail to stop for various reasons, e.g. socket
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* connection going down, but this mustn't prevent us from freeing
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* the mem map.
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*/
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virtio_user_unregister_mem(vdev);
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return ret;
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2017-11-03 11:44:41 +00:00
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}
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static int
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virtio_user_dev_setup(struct virtio_dev *vdev)
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{
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2017-11-03 14:39:45 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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2017-11-03 11:44:41 +00:00
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uint16_t i;
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dev->vhostfd = -1;
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2017-11-20 22:22:02 +00:00
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for (i = 0; i < SPDK_VIRTIO_MAX_VIRTQUEUES; ++i) {
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2017-11-03 11:44:41 +00:00
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dev->callfds[i] = -1;
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dev->kickfds[i] = -1;
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}
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dev->ops = &ops_user;
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2018-07-11 16:54:35 +00:00
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return dev->ops->setup(dev);
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2017-11-03 11:44:41 +00:00
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}
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2018-07-02 11:13:52 +00:00
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static int
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2017-09-01 17:33:53 +00:00
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virtio_user_read_dev_config(struct virtio_dev *vdev, size_t offset,
|
2017-10-18 17:06:51 +00:00
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void *dst, int length)
|
2017-05-30 21:13:50 +00:00
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{
|
2018-02-07 15:08:13 +00:00
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struct virtio_user_dev *dev = vdev->ctx;
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struct vhost_user_config cfg = {0};
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2018-07-11 16:54:35 +00:00
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int rc;
|
2018-02-07 15:08:13 +00:00
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|
|
2018-07-03 07:26:33 +00:00
|
|
|
if ((dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_CONFIG)) == 0) {
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2018-02-07 15:08:13 +00:00
|
|
|
cfg.offset = 0;
|
|
|
|
cfg.size = VHOST_USER_MAX_CONFIG_SIZE;
|
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
rc = dev->ops->send_request(dev, VHOST_USER_GET_CONFIG, &cfg);
|
|
|
|
if (rc < 0) {
|
|
|
|
SPDK_ERRLOG("get_config failed: %s\n", spdk_strerror(-rc));
|
|
|
|
return rc;
|
2018-02-07 15:08:13 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(dst, cfg.region + offset, length);
|
2018-07-02 11:13:52 +00:00
|
|
|
return 0;
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
2018-07-02 11:13:52 +00:00
|
|
|
static int
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_write_dev_config(struct virtio_dev *vdev, size_t offset,
|
2017-10-18 17:06:51 +00:00
|
|
|
const void *src, int length)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2018-02-07 15:08:13 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
|
|
|
struct vhost_user_config cfg = {0};
|
2018-07-11 16:54:35 +00:00
|
|
|
int rc;
|
2018-02-07 15:08:13 +00:00
|
|
|
|
2018-07-03 07:26:33 +00:00
|
|
|
if ((dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_CONFIG)) == 0) {
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2018-02-07 15:08:13 +00:00
|
|
|
cfg.offset = offset;
|
|
|
|
cfg.size = length;
|
|
|
|
memcpy(cfg.region, src, length);
|
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
rc = dev->ops->send_request(dev, VHOST_USER_SET_CONFIG, &cfg);
|
|
|
|
if (rc < 0) {
|
|
|
|
SPDK_ERRLOG("set_config failed: %s\n", spdk_strerror(-rc));
|
|
|
|
return rc;
|
2018-02-07 15:08:13 +00:00
|
|
|
}
|
2018-07-02 11:13:52 +00:00
|
|
|
|
|
|
|
return 0;
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_set_status(struct virtio_dev *vdev, uint8_t status)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2018-03-30 17:24:17 +00:00
|
|
|
int rc = 0;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
2018-03-30 17:24:17 +00:00
|
|
|
if ((dev->status & VIRTIO_CONFIG_S_NEEDS_RESET) &&
|
|
|
|
status != VIRTIO_CONFIG_S_RESET) {
|
|
|
|
rc = -1;
|
|
|
|
} else if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
|
|
|
|
rc = virtio_user_start_device(vdev);
|
2017-10-04 10:19:04 +00:00
|
|
|
} else if (status == VIRTIO_CONFIG_S_RESET &&
|
2017-10-18 17:06:51 +00:00
|
|
|
(dev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
2018-03-30 17:24:17 +00:00
|
|
|
rc = virtio_user_stop_device(vdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc != 0) {
|
|
|
|
dev->status |= VIRTIO_CONFIG_S_NEEDS_RESET;
|
|
|
|
} else {
|
|
|
|
dev->status = status;
|
2017-09-20 16:06:28 +00:00
|
|
|
}
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static uint8_t
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_get_status(struct virtio_dev *vdev)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
|
|
|
return dev->status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint64_t
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_get_features(struct virtio_dev *vdev)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-10-05 12:46:24 +00:00
|
|
|
uint64_t features;
|
2018-07-11 16:54:35 +00:00
|
|
|
int rc;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
rc = dev->ops->send_request(dev, VHOST_USER_GET_FEATURES, &features);
|
|
|
|
if (rc < 0) {
|
|
|
|
SPDK_ERRLOG("get_features failed: %s\n", spdk_strerror(-rc));
|
2017-10-05 12:46:24 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return features;
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
2017-10-05 12:46:24 +00:00
|
|
|
static int
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_set_features(struct virtio_dev *vdev, uint64_t features)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2018-07-02 10:43:05 +00:00
|
|
|
uint64_t protocol_features;
|
2017-10-05 12:46:24 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = dev->ops->send_request(dev, VHOST_USER_SET_FEATURES, &features);
|
|
|
|
if (ret < 0) {
|
2018-07-11 16:54:35 +00:00
|
|
|
return ret;
|
2017-10-05 12:46:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
vdev->negotiated_features = features;
|
2017-11-02 16:10:56 +00:00
|
|
|
vdev->modern = virtio_dev_has_feature(vdev, VIRTIO_F_VERSION_1);
|
2017-05-30 21:13:50 +00:00
|
|
|
|
2018-07-02 10:43:05 +00:00
|
|
|
if (!virtio_dev_has_feature(vdev, VHOST_USER_F_PROTOCOL_FEATURES)) {
|
|
|
|
/* nothing else to do */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = dev->ops->send_request(dev, VHOST_USER_GET_PROTOCOL_FEATURES, &protocol_features);
|
|
|
|
if (ret < 0) {
|
2018-07-11 16:54:35 +00:00
|
|
|
return ret;
|
2018-07-02 10:43:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
protocol_features &= VIRTIO_USER_SUPPORTED_PROTOCOL_FEATURES;
|
|
|
|
ret = dev->ops->send_request(dev, VHOST_USER_SET_PROTOCOL_FEATURES, &protocol_features);
|
|
|
|
if (ret < 0) {
|
2018-07-11 16:54:35 +00:00
|
|
|
return ret;
|
2018-07-02 10:43:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
dev->protocol_features = protocol_features;
|
2017-10-05 12:46:24 +00:00
|
|
|
return 0;
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static uint16_t
|
2018-04-18 11:37:48 +00:00
|
|
|
virtio_user_get_queue_size(struct virtio_dev *vdev, uint16_t queue_id)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
2018-04-18 11:37:48 +00:00
|
|
|
/* Currently each queue has same queue size */
|
2017-05-30 21:13:50 +00:00
|
|
|
return dev->queue_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_setup_queue(struct virtio_dev *vdev, struct virtqueue *vq)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2018-07-02 10:43:05 +00:00
|
|
|
struct vhost_vring_state state;
|
2017-05-30 21:13:50 +00:00
|
|
|
uint16_t queue_idx = vq->vq_queue_index;
|
2018-06-27 10:33:19 +00:00
|
|
|
void *queue_mem;
|
2017-05-30 21:13:50 +00:00
|
|
|
uint64_t desc_addr, avail_addr, used_addr;
|
2018-07-11 16:54:35 +00:00
|
|
|
int callfd, kickfd, rc;
|
2017-09-20 15:50:08 +00:00
|
|
|
|
|
|
|
if (dev->callfds[queue_idx] != -1 || dev->kickfds[queue_idx] != -1) {
|
2017-10-14 10:43:58 +00:00
|
|
|
SPDK_ERRLOG("queue %"PRIu16" already exists\n", queue_idx);
|
2018-07-11 16:54:35 +00:00
|
|
|
return -EEXIST;
|
2017-09-20 15:50:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* May use invalid flag, but some backend uses kickfd and
|
|
|
|
* callfd as criteria to judge if dev is alive. so finally we
|
|
|
|
* use real event_fd.
|
|
|
|
*/
|
|
|
|
callfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
|
|
|
|
if (callfd < 0) {
|
2017-11-07 12:56:52 +00:00
|
|
|
SPDK_ERRLOG("callfd error, %s\n", spdk_strerror(errno));
|
2018-07-11 16:54:35 +00:00
|
|
|
return -errno;
|
2017-09-20 15:50:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
kickfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
|
|
|
|
if (kickfd < 0) {
|
2017-11-07 12:56:52 +00:00
|
|
|
SPDK_ERRLOG("kickfd error, %s\n", spdk_strerror(errno));
|
2017-09-20 15:50:08 +00:00
|
|
|
close(callfd);
|
2018-07-11 16:54:35 +00:00
|
|
|
return -errno;
|
2017-09-20 15:50:08 +00:00
|
|
|
}
|
|
|
|
|
2019-04-08 21:35:25 +00:00
|
|
|
queue_mem = spdk_zmalloc(vq->vq_ring_size, VIRTIO_PCI_VRING_ALIGN, NULL,
|
|
|
|
SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
|
2018-07-11 15:43:15 +00:00
|
|
|
if (queue_mem == NULL) {
|
|
|
|
close(kickfd);
|
|
|
|
close(callfd);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
vq->vq_ring_mem = SPDK_VTOPHYS_ERROR;
|
|
|
|
vq->vq_ring_virt_mem = queue_mem;
|
|
|
|
|
2018-07-02 10:43:05 +00:00
|
|
|
state.index = vq->vq_queue_index;
|
|
|
|
state.num = 0;
|
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
if (virtio_dev_has_feature(vdev, VHOST_USER_F_PROTOCOL_FEATURES)) {
|
|
|
|
rc = dev->ops->send_request(dev, VHOST_USER_SET_VRING_ENABLE, &state);
|
|
|
|
if (rc < 0) {
|
|
|
|
SPDK_ERRLOG("failed to send VHOST_USER_SET_VRING_ENABLE: %s\n",
|
|
|
|
spdk_strerror(-rc));
|
2019-04-08 21:35:25 +00:00
|
|
|
spdk_free(queue_mem);
|
2018-07-11 16:54:35 +00:00
|
|
|
return -rc;
|
|
|
|
}
|
2018-07-02 10:43:05 +00:00
|
|
|
}
|
|
|
|
|
2017-09-20 15:50:08 +00:00
|
|
|
dev->callfds[queue_idx] = callfd;
|
|
|
|
dev->kickfds[queue_idx] = kickfd;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
|
|
|
desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
|
|
|
|
avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
|
|
|
|
used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
|
2017-10-18 17:06:51 +00:00
|
|
|
ring[vq->vq_nentries]),
|
2017-05-30 21:13:50 +00:00
|
|
|
VIRTIO_PCI_VRING_ALIGN);
|
|
|
|
|
|
|
|
dev->vrings[queue_idx].num = vq->vq_nentries;
|
|
|
|
dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
|
|
|
|
dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr;
|
|
|
|
dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_del_queue(struct virtio_dev *vdev, struct virtqueue *vq)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
|
|
|
/* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU
|
|
|
|
* correspondingly stops the ioeventfds, and reset the status of
|
|
|
|
* the device.
|
|
|
|
* For modern devices, set queue desc, avail, used in PCI bar to 0,
|
|
|
|
* not see any more behavior in QEMU.
|
|
|
|
*
|
2018-07-02 09:33:33 +00:00
|
|
|
* Here we just care about what information to deliver to vhost-user.
|
|
|
|
* So we just close ioeventfd for now.
|
2017-05-30 21:13:50 +00:00
|
|
|
*/
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
|
|
|
close(dev->callfds[vq->vq_queue_index]);
|
|
|
|
close(dev->kickfds[vq->vq_queue_index]);
|
2017-09-20 15:50:08 +00:00
|
|
|
dev->callfds[vq->vq_queue_index] = -1;
|
|
|
|
dev->kickfds[vq->vq_queue_index] = -1;
|
2018-06-27 10:33:19 +00:00
|
|
|
|
2019-04-08 21:35:25 +00:00
|
|
|
spdk_free(vq->vq_ring_virt_mem);
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2017-09-01 17:33:53 +00:00
|
|
|
virtio_user_notify_queue(struct virtio_dev *vdev, struct virtqueue *vq)
|
2017-05-30 21:13:50 +00:00
|
|
|
{
|
|
|
|
uint64_t buf = 1;
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-05-30 21:13:50 +00:00
|
|
|
|
2017-10-18 11:30:18 +00:00
|
|
|
if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) {
|
2017-11-07 12:56:52 +00:00
|
|
|
SPDK_ERRLOG("failed to kick backend: %s.\n", spdk_strerror(errno));
|
2017-10-18 11:30:18 +00:00
|
|
|
}
|
2017-05-30 21:13:50 +00:00
|
|
|
}
|
|
|
|
|
2017-09-29 11:03:45 +00:00
|
|
|
static void
|
2017-11-20 18:24:24 +00:00
|
|
|
virtio_user_destroy(struct virtio_dev *vdev)
|
2017-09-29 11:03:45 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-09-29 11:03:45 +00:00
|
|
|
|
2017-11-03 12:28:07 +00:00
|
|
|
close(dev->vhostfd);
|
|
|
|
free(dev);
|
2017-09-29 11:03:45 +00:00
|
|
|
}
|
|
|
|
|
2017-10-09 18:45:13 +00:00
|
|
|
static void
|
2018-03-27 13:45:10 +00:00
|
|
|
virtio_user_dump_json_info(struct virtio_dev *vdev, struct spdk_json_write_ctx *w)
|
2017-10-09 18:45:13 +00:00
|
|
|
{
|
2017-11-03 14:39:45 +00:00
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
2017-10-09 18:45:13 +00:00
|
|
|
|
2019-02-01 05:41:15 +00:00
|
|
|
spdk_json_write_named_string(w, "type", "user");
|
|
|
|
spdk_json_write_named_string(w, "socket", dev->path);
|
2017-10-09 18:45:13 +00:00
|
|
|
}
|
|
|
|
|
2018-03-27 13:45:10 +00:00
|
|
|
static void
|
|
|
|
virtio_user_write_json_config(struct virtio_dev *vdev, struct spdk_json_write_ctx *w)
|
|
|
|
{
|
|
|
|
struct virtio_user_dev *dev = vdev->ctx;
|
|
|
|
|
|
|
|
spdk_json_write_named_string(w, "trtype", "user");
|
|
|
|
spdk_json_write_named_string(w, "traddr", dev->path);
|
|
|
|
spdk_json_write_named_uint32(w, "vq_count", vdev->max_queues - vdev->fixed_queues_num);
|
2018-04-18 11:37:48 +00:00
|
|
|
spdk_json_write_named_uint32(w, "vq_size", virtio_dev_backend_ops(vdev)->get_queue_size(vdev, 0));
|
2018-03-27 13:45:10 +00:00
|
|
|
}
|
|
|
|
|
2017-11-03 15:55:38 +00:00
|
|
|
static const struct virtio_dev_ops virtio_user_ops = {
|
2017-05-30 21:13:50 +00:00
|
|
|
.read_dev_cfg = virtio_user_read_dev_config,
|
|
|
|
.write_dev_cfg = virtio_user_write_dev_config,
|
|
|
|
.get_status = virtio_user_get_status,
|
|
|
|
.set_status = virtio_user_set_status,
|
|
|
|
.get_features = virtio_user_get_features,
|
|
|
|
.set_features = virtio_user_set_features,
|
2017-11-20 18:24:24 +00:00
|
|
|
.destruct_dev = virtio_user_destroy,
|
2018-04-18 11:37:48 +00:00
|
|
|
.get_queue_size = virtio_user_get_queue_size,
|
2017-05-30 21:13:50 +00:00
|
|
|
.setup_queue = virtio_user_setup_queue,
|
|
|
|
.del_queue = virtio_user_del_queue,
|
|
|
|
.notify_queue = virtio_user_notify_queue,
|
2018-03-27 13:45:10 +00:00
|
|
|
.dump_json_info = virtio_user_dump_json_info,
|
|
|
|
.write_json_config = virtio_user_write_json_config,
|
2017-05-30 21:13:50 +00:00
|
|
|
};
|
2017-11-03 15:55:38 +00:00
|
|
|
|
2017-11-20 18:24:24 +00:00
|
|
|
int
|
|
|
|
virtio_user_dev_init(struct virtio_dev *vdev, const char *name, const char *path,
|
2017-12-27 14:51:17 +00:00
|
|
|
uint32_t queue_size)
|
2017-11-03 15:55:38 +00:00
|
|
|
{
|
|
|
|
struct virtio_user_dev *dev;
|
2017-11-20 18:24:24 +00:00
|
|
|
int rc;
|
2017-11-03 15:55:38 +00:00
|
|
|
|
|
|
|
if (name == NULL) {
|
|
|
|
SPDK_ERRLOG("No name gived for controller: %s\n", path);
|
2018-07-11 16:54:35 +00:00
|
|
|
return -EINVAL;
|
2017-11-03 15:55:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
dev = calloc(1, sizeof(*dev));
|
|
|
|
if (dev == NULL) {
|
2018-07-11 16:54:35 +00:00
|
|
|
return -ENOMEM;
|
2017-11-03 15:55:38 +00:00
|
|
|
}
|
|
|
|
|
2018-01-15 12:06:58 +00:00
|
|
|
rc = virtio_dev_construct(vdev, name, &virtio_user_ops, dev);
|
2017-11-20 18:24:24 +00:00
|
|
|
if (rc != 0) {
|
2017-11-03 15:55:38 +00:00
|
|
|
SPDK_ERRLOG("Failed to init device: %s\n", path);
|
|
|
|
free(dev);
|
2018-07-11 16:54:35 +00:00
|
|
|
return rc;
|
2017-11-03 15:55:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
vdev->is_hw = 0;
|
|
|
|
|
|
|
|
snprintf(dev->path, PATH_MAX, "%s", path);
|
|
|
|
dev->queue_size = queue_size;
|
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
rc = virtio_user_dev_setup(vdev);
|
|
|
|
if (rc < 0) {
|
2017-11-03 15:55:38 +00:00
|
|
|
SPDK_ERRLOG("backend set up fails\n");
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
2018-07-11 16:54:35 +00:00
|
|
|
rc = dev->ops->send_request(dev, VHOST_USER_SET_OWNER, NULL);
|
|
|
|
if (rc < 0) {
|
|
|
|
SPDK_ERRLOG("set_owner fails: %s\n", spdk_strerror(-rc));
|
2017-11-03 15:55:38 +00:00
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
2017-11-20 18:24:24 +00:00
|
|
|
return 0;
|
2017-11-03 15:55:38 +00:00
|
|
|
|
|
|
|
err:
|
2017-11-20 18:24:24 +00:00
|
|
|
virtio_dev_destruct(vdev);
|
2018-07-11 16:54:35 +00:00
|
|
|
return rc;
|
2017-11-03 15:55:38 +00:00
|
|
|
}
|