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14#ifndef QEMU_VIRTIO_SCSI_H
15#define QEMU_VIRTIO_SCSI_H
16#include "qom/object.h"
17
18
19#define VIRTIO_SCSI_CDB_SIZE 0
20#define VIRTIO_SCSI_SENSE_SIZE 0
21#include "standard-headers/linux/virtio_scsi.h"
22#include "hw/virtio/virtio.h"
23#include "hw/pci/pci.h"
24#include "hw/scsi/scsi.h"
25#include "chardev/char-fe.h"
26#include "sysemu/iothread.h"
27
28#define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
29OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON)
30
31#define TYPE_VIRTIO_SCSI "virtio-scsi-device"
32OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSI, VIRTIO_SCSI)
33
34#define VIRTIO_SCSI_MAX_CHANNEL 0
35#define VIRTIO_SCSI_MAX_TARGET 255
36#define VIRTIO_SCSI_MAX_LUN 16383
37
38
39#define VIRTIO_SCSI_VQ_NUM_FIXED 2
40
41#define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX
42
43typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
44typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
45typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
46typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
47typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
48typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
49typedef struct virtio_scsi_event VirtIOSCSIEvent;
50typedef struct virtio_scsi_config VirtIOSCSIConfig;
51
52struct VirtIOSCSIConf {
53 uint32_t num_queues;
54 uint32_t virtqueue_size;
55 bool seg_max_adjust;
56 uint32_t max_sectors;
57 uint32_t cmd_per_lun;
58#ifdef CONFIG_VHOST_SCSI
59 char *vhostfd;
60 char *wwpn;
61#endif
62 CharBackend chardev;
63 uint32_t boot_tpgt;
64 IOThread *iothread;
65};
66
67struct VirtIOSCSI;
68
69struct VirtIOSCSICommon {
70 VirtIODevice parent_obj;
71 VirtIOSCSIConf conf;
72
73 uint32_t sense_size;
74 uint32_t cdb_size;
75 VirtQueue *ctrl_vq;
76 VirtQueue *event_vq;
77 VirtQueue **cmd_vqs;
78};
79
80struct VirtIOSCSI {
81 VirtIOSCSICommon parent_obj;
82
83 SCSIBus bus;
84 int resetting;
85 bool events_dropped;
86
87
88 AioContext *ctx;
89
90 bool dataplane_started;
91 bool dataplane_starting;
92 bool dataplane_stopping;
93 bool dataplane_fenced;
94 uint32_t host_features;
95};
96
97typedef struct VirtIOSCSIReq {
98
99
100
101
102 VirtQueueElement elem;
103
104 VirtIOSCSI *dev;
105 VirtQueue *vq;
106 QEMUSGList qsgl;
107 QEMUIOVector resp_iov;
108
109 union {
110
111 QTAILQ_ENTRY(VirtIOSCSIReq) next;
112
113
114 int remaining;
115 };
116
117 SCSIRequest *sreq;
118 size_t resp_size;
119 enum SCSIXferMode mode;
120 union {
121 VirtIOSCSICmdResp cmd;
122 VirtIOSCSICtrlTMFResp tmf;
123 VirtIOSCSICtrlANResp an;
124 VirtIOSCSIEvent event;
125 } resp;
126 union {
127 VirtIOSCSICmdReq cmd;
128 VirtIOSCSICtrlTMFReq tmf;
129 VirtIOSCSICtrlANReq an;
130 } req;
131} VirtIOSCSIReq;
132
133static inline void virtio_scsi_acquire(VirtIOSCSI *s)
134{
135 if (s->ctx) {
136 aio_context_acquire(s->ctx);
137 }
138}
139
140static inline void virtio_scsi_release(VirtIOSCSI *s)
141{
142 if (s->ctx) {
143 aio_context_release(s->ctx);
144 }
145}
146
147void virtio_scsi_common_realize(DeviceState *dev,
148 VirtIOHandleOutput ctrl,
149 VirtIOHandleOutput evt,
150 VirtIOHandleOutput cmd,
151 Error **errp);
152
153void virtio_scsi_common_unrealize(DeviceState *dev);
154bool virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq);
155bool virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq);
156bool virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq);
157void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req);
158void virtio_scsi_free_req(VirtIOSCSIReq *req);
159void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
160 uint32_t event, uint32_t reason);
161
162void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
163int virtio_scsi_dataplane_start(VirtIODevice *s);
164void virtio_scsi_dataplane_stop(VirtIODevice *s);
165
166#endif
167