hw/virtio-scsi.h

   1 /*
   2  * Virtio SCSI HBA
   3  *
   4  * Copyright IBM, Corp. 2010
   5  *
   6  * Authors:
   7  *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef _QEMU_VIRTIO_SCSI_H
  15 #define _QEMU_VIRTIO_SCSI_H
  16
  17 #include "hw/virtio.h"
  18 #include "hw/pci/pci.h"
  19 #include "hw/scsi.h"
  20
  21 /* The ID for virtio_scsi */
  22 #define VIRTIO_ID_SCSI  8
  23
  24 /* Feature Bits */
  25 #define VIRTIO_SCSI_F_INOUT                    0
  26 #define VIRTIO_SCSI_F_HOTPLUG                  1
  27 #define VIRTIO_SCSI_F_CHANGE                   2
  28
  29 struct VirtIOSCSIConf {
  30     uint32_t num_queues;
  31     uint32_t max_sectors;
  32     uint32_t cmd_per_lun;
  33 };
  34
  35 typedef struct VirtIOSCSI {
  36     VirtIODevice vdev;
  37     DeviceState *qdev;
  38     VirtIOSCSIConf *conf;
  39
  40     SCSIBus bus;
  41     uint32_t sense_size;
  42     uint32_t cdb_size;
  43     int resetting;
  44     bool events_dropped;
  45     VirtQueue *ctrl_vq;
  46     VirtQueue *event_vq;
  47     VirtQueue *cmd_vqs[0];
  48 } VirtIOSCSI;
  49
  50 #define DEFINE_VIRTIO_SCSI_PROPERTIES(_state, _features_field, _conf_field) \
  51     DEFINE_VIRTIO_COMMON_FEATURES(_state, _features_field), \
  52     DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \
  53     DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF), \
  54     DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128), \
  55     DEFINE_PROP_BIT("hotplug", _state, _features_field, VIRTIO_SCSI_F_HOTPLUG, true), \
  56     DEFINE_PROP_BIT("param_change", _state, _features_field, VIRTIO_SCSI_F_CHANGE, true)
  57
  58 #endif /* _QEMU_VIRTIO_SCSI_H */