3998e2a072
Replace the BSD license header with the SPDX tag for files with only an Intel copyright on them. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
80 lines
1.7 KiB
C
80 lines
1.7 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_SCSI_H_
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#define _VHOST_SCSI_H_
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#include <sys/uio.h>
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#include <stdint.h>
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#include <linux/virtio_scsi.h>
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#include <linux/virtio_ring.h>
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#include <rte_vhost.h>
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struct vhost_scsi_queue {
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struct rte_vhost_vring vq;
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uint16_t last_avail_idx;
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uint16_t last_used_idx;
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};
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#define NUM_OF_SCSI_QUEUES 3
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struct vhost_block_dev {
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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_scsi_queue queues[NUM_OF_SCSI_QUEUES];
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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_scsi_ctrlr {
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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_SCSI_MAX_IOVS 128
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enum scsi_data_dir {
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SCSI_DIR_NONE = 0,
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SCSI_DIR_TO_DEV = 1,
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SCSI_DIR_FROM_DEV = 2,
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};
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struct vhost_scsi_task {
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int req_idx;
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uint32_t dxfer_dir;
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uint32_t data_len;
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struct virtio_scsi_cmd_req *req;
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struct virtio_scsi_cmd_resp *resp;
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struct iovec iovs[VHOST_SCSI_MAX_IOVS];
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uint32_t iovs_cnt;
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struct vring_desc *desc;
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struct rte_vhost_vring *vq;
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struct vhost_block_dev *bdev;
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struct vhost_scsi_ctrlr *ctrlr;
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};
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int vhost_bdev_process_scsi_commands(struct vhost_block_dev *bdev,
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struct vhost_scsi_task *task);
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#endif /* _VHOST_SCSI_H_ */
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