4 * Copyright IBM, Corp. 2010
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #ifndef QEMU_VIRTIO_SCSI_H
15 #define QEMU_VIRTIO_SCSI_H
17 /* Override CDB/sense data size: they are dynamic (guest controlled) in QEMU */
18 #define VIRTIO_SCSI_CDB_SIZE 0
19 #define VIRTIO_SCSI_SENSE_SIZE 0
20 #include "standard-headers/linux/virtio_scsi.h"
21 #include "hw/virtio/virtio.h"
22 #include "hw/pci/pci.h"
23 #include "hw/scsi/scsi.h"
24 #include "sysemu/iothread.h"
26 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
27 #define VIRTIO_SCSI_COMMON(obj) \
28 OBJECT_CHECK(VirtIOSCSICommon, (obj), TYPE_VIRTIO_SCSI_COMMON)
30 #define TYPE_VIRTIO_SCSI "virtio-scsi-device"
31 #define VIRTIO_SCSI(obj) \
32 OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
34 #define VIRTIO_SCSI_VQ_SIZE 128
35 #define VIRTIO_SCSI_MAX_CHANNEL 0
36 #define VIRTIO_SCSI_MAX_TARGET 255
37 #define VIRTIO_SCSI_MAX_LUN 16383
39 typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
40 typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
41 typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
42 typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
43 typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
44 typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
45 typedef struct virtio_scsi_event VirtIOSCSIEvent;
46 typedef struct virtio_scsi_config VirtIOSCSIConfig;
48 struct VirtIOSCSIConf {
60 typedef struct VirtIOSCSICommon {
61 VirtIODevice parent_obj;
71 typedef struct VirtIOSCSI {
72 VirtIOSCSICommon parent_obj;
78 /* Fields for dataplane below */
79 AioContext *ctx; /* one iothread per virtio-scsi-pci for now */
81 bool dataplane_started;
82 bool dataplane_starting;
83 bool dataplane_stopping;
84 bool dataplane_fenced;
85 uint32_t host_features;
88 typedef struct VirtIOSCSIReq {
90 * - fields up to resp_iov are initialized by virtio_scsi_init_req;
91 * - fields starting at vring are zeroed by virtio_scsi_init_req.
93 VirtQueueElement elem;
98 QEMUIOVector resp_iov;
101 /* Used for two-stage request submission */
102 QTAILQ_ENTRY(VirtIOSCSIReq) next;
104 /* Used for cancellation of request during TMFs */
110 enum SCSIXferMode mode;
112 VirtIOSCSICmdResp cmd;
113 VirtIOSCSICtrlTMFResp tmf;
114 VirtIOSCSICtrlANResp an;
115 VirtIOSCSIEvent event;
118 VirtIOSCSICmdReq cmd;
119 VirtIOSCSICtrlTMFReq tmf;
120 VirtIOSCSICtrlANReq an;
124 typedef void (*HandleOutput)(VirtIODevice *, VirtQueue *);
126 void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
127 HandleOutput ctrl, HandleOutput evt,
130 void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp);
131 void virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq);
132 void virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq);
133 void virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq);
134 void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req);
135 void virtio_scsi_free_req(VirtIOSCSIReq *req);
136 void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
137 uint32_t event, uint32_t reason);
139 void virtio_scsi_set_iothread(VirtIOSCSI *s, IOThread *iothread);
140 void virtio_scsi_dataplane_start(VirtIOSCSI *s);
141 void virtio_scsi_dataplane_stop(VirtIOSCSI *s);
142 void virtio_scsi_dataplane_notify(VirtIODevice *vdev, VirtIOSCSIReq *req);
144 #endif /* QEMU_VIRTIO_SCSI_H */