Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/src/spdk/dpdk/examples/vhost_scsi/vhost_scsi.h b/src/spdk/dpdk/examples/vhost_scsi/vhost_scsi.h
new file mode 100644
index 00000000..7f98d8d1
--- /dev/null
+++ b/src/spdk/dpdk/examples/vhost_scsi/vhost_scsi.h
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2017 Intel Corporation
+ */
+
+#ifndef _VHOST_SCSI_H_
+#define _VHOST_SCSI_H_
+
+#include <sys/uio.h>
+#include <stdint.h>
+#include <linux/virtio_scsi.h>
+#include <linux/virtio_ring.h>
+
+#include <rte_vhost.h>
+
+struct vhost_scsi_queue {
+	struct rte_vhost_vring vq;
+	uint16_t last_avail_idx;
+	uint16_t last_used_idx;
+};
+
+#define NUM_OF_SCSI_QUEUES 3
+
+struct vhost_block_dev {
+	/** ID for vhost library. */
+	int vid;
+	/** Queues for the block device */
+	struct vhost_scsi_queue queues[NUM_OF_SCSI_QUEUES];
+	/** Unique name for this block device. */
+	char name[64];
+
+	/** Unique product name for this kind of block device. */
+	char product_name[256];
+
+	/** Size in bytes of a logical block for the backend */
+	uint32_t blocklen;
+
+	/** Number of blocks */
+	uint64_t blockcnt;
+
+	/** write cache enabled, not used at the moment */
+	int write_cache;
+
+	/** use memory as disk storage space */
+	uint8_t *data;
+};
+
+struct vhost_scsi_ctrlr {
+	/** Only support 1 LUN for the example */
+	struct vhost_block_dev *bdev;
+	/** VM memory region */
+	struct rte_vhost_memory *mem;
+} __rte_cache_aligned;
+
+#define VHOST_SCSI_MAX_IOVS 128
+
+enum scsi_data_dir {
+	SCSI_DIR_NONE = 0,
+	SCSI_DIR_TO_DEV = 1,
+	SCSI_DIR_FROM_DEV = 2,
+};
+
+struct vhost_scsi_task {
+	int req_idx;
+	uint32_t dxfer_dir;
+	uint32_t data_len;
+	struct virtio_scsi_cmd_req *req;
+	struct virtio_scsi_cmd_resp *resp;
+	struct iovec iovs[VHOST_SCSI_MAX_IOVS];
+	uint32_t iovs_cnt;
+	struct vring_desc *desc;
+	struct rte_vhost_vring *vq;
+	struct vhost_block_dev *bdev;
+	struct vhost_scsi_ctrlr *ctrlr;
+};
+
+int vhost_bdev_process_scsi_commands(struct vhost_block_dev *bdev,
+				     struct vhost_scsi_task *task);
+
+#endif /* _VHOST_SCSI_H_ */