linux-imx

/*

 * Virtio SCSI HBA driver

 *

 * Copyright IBM Corp. 2010

 * Copyright Red Hat, Inc. 2011

 *

 * Authors:

 *  Stefan Hajnoczi   <stefanha@linux.vnet.ibm.com>

 *  Paolo Bonzini   <pbonzini@redhat.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/mempool.h>

#include <linux/interrupt.h>

#include <linux/virtio.h>

#include <linux/virtio_ids.h>

#include <linux/virtio_config.h>

#include <linux/virtio_scsi.h>

#include <linux/cpu.h>

#include <linux/blkdev.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_tcq.h>

#include <scsi/scsi_devinfo.h>

#include <linux/seqlock.h>

#include <linux/blk-mq-virtio.h>

​

#define VIRTIO_SCSI_MEMPOOL_SZ 64

#define VIRTIO_SCSI_EVENT_LEN 8

#define VIRTIO_SCSI_VQ_BASE 2

​

/* Command queue element */

struct virtio_scsi_cmd {

    struct scsi_cmnd *sc;

    struct completion *comp;

    union {

        struct virtio_scsi_cmd_req       cmd;

        struct virtio_scsi_cmd_req_pi    cmd_pi;

        struct virtio_scsi_ctrl_tmf_req  tmf;

        struct virtio_scsi_ctrl_an_req   an;

    } req;

    union {

        struct virtio_scsi_cmd_resp      cmd;

        struct virtio_scsi_ctrl_tmf_resp tmf;

        struct virtio_scsi_ctrl_an_resp  an;

        struct virtio_scsi_event         evt;

    } resp;

} ____cacheline_aligned_in_smp;

​

struct virtio_scsi_event_node {

    struct virtio_scsi *vscsi;

    struct virtio_scsi_event event;

    struct work_struct work;

};

​