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 #define TYPE_VIRTIO_SCSI "virtio-scsi"
  22 #define VIRTIO_SCSI(obj) \
  23         OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
  24
  25
  26 /* The ID for virtio_scsi */
  27 #define VIRTIO_ID_SCSI  8
  28
  29 /* Feature Bits */
  30 #define VIRTIO_SCSI_F_INOUT                    0
  31 #define VIRTIO_SCSI_F_HOTPLUG                  1
  32 #define VIRTIO_SCSI_F_CHANGE                   2
  33
  34 struct VirtIOSCSIConf {
  35     uint32_t num_queues;
  36     uint32_t max_sectors;
  37     uint32_t cmd_per_lun;
  38 };
  39
  40 typedef struct VirtIOSCSI {
  41     VirtIODevice parent_obj;
  42     VirtIOSCSIConf conf;
  43
  44     SCSIBus bus;
  45     uint32_t sense_size;
  46     uint32_t cdb_size;
  47     int resetting;
  48     bool events_dropped;
  49     VirtQueue *ctrl_vq;
  50     VirtQueue *event_vq;
  51     VirtQueue **cmd_vqs;
  52 } VirtIOSCSI;
  53
  54 #define DEFINE_VIRTIO_SCSI_PROPERTIES(_state, _conf_field)                     \
  55     DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1),       \
  56     DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF),\
  57     DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128)
  58
  59 #define DEFINE_VIRTIO_SCSI_FEATURES(_state, _feature_field)                    \
  60     DEFINE_VIRTIO_COMMON_FEATURES(_state, _feature_field),                     \
  61     DEFINE_PROP_BIT("hotplug", _state, _feature_field, VIRTIO_SCSI_F_HOTPLUG,  \
  62                                                        true),                  \
  63     DEFINE_PROP_BIT("param_change", _state, _feature_field,                    \
  64                                             VIRTIO_SCSI_F_CHANGE, true)
  65
  66 #endif /* _QEMU_VIRTIO_SCSI_H */