ab4bb42406
As previously announced, this patch renames struct vhost_device_ops to struct rte_vhost_device_ops. Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2017 Intel Corporation
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*/
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#ifndef _VHOST_BLK_H_
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#define _VHOST_BLK_H_
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#include <stdio.h>
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#include <sys/uio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <linux/virtio_blk.h>
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#include <linux/virtio_ring.h>
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#include <rte_vhost.h>
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#ifndef VIRTIO_F_RING_PACKED
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#define VIRTIO_F_RING_PACKED 34
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struct vring_packed_desc {
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/* Buffer Address. */
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__le64 addr;
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/* Buffer Length. */
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__le32 len;
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/* Buffer ID. */
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__le16 id;
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/* The flags depending on descriptor type. */
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__le16 flags;
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};
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#endif
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struct vhost_blk_queue {
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struct rte_vhost_vring vring;
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struct rte_vhost_ring_inflight inflight_ring;
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uint16_t last_avail_idx;
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uint16_t last_used_idx;
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uint16_t id;
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bool avail_wrap_counter;
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bool used_wrap_counter;
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bool packed_ring;
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struct vhost_blk_task *tasks;
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};
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#define NUM_OF_BLK_QUEUES 1
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struct vhost_block_dev {
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/** Unique name for this block device. */
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char name[64];
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/** Unique product name for this kind of block device. */
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char product_name[256];
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/** Size in bytes of a logical block for the backend */
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uint32_t blocklen;
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/** Number of blocks */
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uint64_t blockcnt;
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/** write cache enabled, not used at the moment */
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int write_cache;
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/** use memory as disk storage space */
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uint8_t *data;
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};
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struct vhost_blk_ctrlr {
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uint8_t started;
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/** ID for vhost library. */
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int vid;
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/** Queues for the block device */
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struct vhost_blk_queue queues[NUM_OF_BLK_QUEUES];
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/** Only support 1 LUN for the example */
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struct vhost_block_dev *bdev;
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/** VM memory region */
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struct rte_vhost_memory *mem;
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} __rte_cache_aligned;
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#define VHOST_BLK_MAX_IOVS 128
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enum blk_data_dir {
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BLK_DIR_NONE = 0,
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BLK_DIR_TO_DEV = 1,
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BLK_DIR_FROM_DEV = 2,
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};
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struct vhost_blk_task {
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uint8_t req_idx;
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uint16_t chain_num;
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uint16_t inflight_idx;
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uint16_t buffer_id;
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uint32_t dxfer_dir;
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uint32_t data_len;
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struct virtio_blk_outhdr *req;
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volatile uint8_t *status;
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struct iovec iovs[VHOST_BLK_MAX_IOVS];
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uint32_t iovs_cnt;
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struct vhost_blk_queue *vq;
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struct vhost_blk_ctrlr *ctrlr;
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};
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extern struct vhost_blk_ctrlr *g_vhost_ctrlr;
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extern struct rte_vhost_device_ops vhost_blk_device_ops;
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int vhost_bdev_process_blk_commands(struct vhost_block_dev *bdev,
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struct vhost_blk_task *task);
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void vhost_session_install_rte_compat_hooks(uint32_t vid);
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void vhost_dev_install_rte_compat_hooks(const char *path);
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struct vhost_blk_ctrlr *vhost_blk_ctrlr_find(const char *ctrlr_name);
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#endif /* _VHOST_blk_H_ */
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