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14#ifndef QEMU_VIRTIO_SCSI_H
15#define QEMU_VIRTIO_SCSI_H
16
17
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 "chardev/char-fe.h"
25#include "sysemu/iothread.h"
26
27#define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
28#define VIRTIO_SCSI_COMMON(obj) \
29 OBJECT_CHECK(VirtIOSCSICommon, (obj), TYPE_VIRTIO_SCSI_COMMON)
30
31#define TYPE_VIRTIO_SCSI "virtio-scsi-device"
32#define VIRTIO_SCSI(obj) \
33 OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
34
35#define VIRTIO_SCSI_MAX_CHANNEL 0
36#define VIRTIO_SCSI_MAX_TARGET 255
37#define VIRTIO_SCSI_MAX_LUN 16383
38
39typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
40typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
41typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
42typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
43typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
44typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
45typedef struct virtio_scsi_event VirtIOSCSIEvent;
46typedef struct virtio_scsi_config VirtIOSCSIConfig;
47
48struct VirtIOSCSIConf {
49 uint32_t num_queues;
50 uint32_t virtqueue_size;
51 bool seg_max_adjust;
52 uint32_t max_sectors;
53 uint32_t cmd_per_lun;
54#ifdef CONFIG_VHOST_SCSI
55 char *vhostfd;
56 char *wwpn;
57#endif
58 CharBackend chardev;
59 uint32_t boot_tpgt;
60 IOThread *iothread;
61};
62
63struct VirtIOSCSI;
64
65typedef struct VirtIOSCSICommon {
66 VirtIODevice parent_obj;
67 VirtIOSCSIConf conf;
68
69 uint32_t sense_size;
70 uint32_t cdb_size;
71 VirtQueue *ctrl_vq;
72 VirtQueue *event_vq;
73 VirtQueue **cmd_vqs;
74} VirtIOSCSICommon;
75
76typedef struct VirtIOSCSI {
77 VirtIOSCSICommon parent_obj;
78
79 SCSIBus bus;
80 int resetting;
81 bool events_dropped;
82
83
84 AioContext *ctx;
85
86 bool dataplane_started;
87 bool dataplane_starting;
88 bool dataplane_stopping;
89 bool dataplane_fenced;
90 uint32_t host_features;
91} VirtIOSCSI;
92
93typedef struct VirtIOSCSIReq {
94
95
96
97
98 VirtQueueElement elem;
99
100 VirtIOSCSI *dev;
101 VirtQueue *vq;
102 QEMUSGList qsgl;
103 QEMUIOVector resp_iov;
104
105 union {
106
107 QTAILQ_ENTRY(VirtIOSCSIReq) next;
108
109
110 int remaining;
111 };
112
113 SCSIRequest *sreq;
114 size_t resp_size;
115 enum SCSIXferMode mode;
116 union {
117 VirtIOSCSICmdResp cmd;
118 VirtIOSCSICtrlTMFResp tmf;
119 VirtIOSCSICtrlANResp an;
120 VirtIOSCSIEvent event;
121 } resp;
122 union {
123 VirtIOSCSICmdReq cmd;
124 VirtIOSCSICtrlTMFReq tmf;
125 VirtIOSCSICtrlANReq an;
126 } req;
127} VirtIOSCSIReq;
128
129static inline void virtio_scsi_acquire(VirtIOSCSI *s)
130{
131 if (s->ctx) {
132 aio_context_acquire(s->ctx);
133 }
134}
135
136static inline void virtio_scsi_release(VirtIOSCSI *s)
137{
138 if (s->ctx) {
139 aio_context_release(s->ctx);
140 }
141}
142
143void virtio_scsi_common_realize(DeviceState *dev,
144 VirtIOHandleOutput ctrl,
145 VirtIOHandleOutput evt,
146 VirtIOHandleOutput cmd,
147 Error **errp);
148
149void virtio_scsi_common_unrealize(DeviceState *dev);
150bool virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq);
151bool virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq);
152bool virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq);
153void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req);
154void virtio_scsi_free_req(VirtIOSCSIReq *req);
155void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
156 uint32_t event, uint32_t reason);
157
158void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
159int virtio_scsi_dataplane_start(VirtIODevice *s);
160void virtio_scsi_dataplane_stop(VirtIODevice *s);
161
162#endif
163