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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 #include "qom/object.h"
17
18 /* Override CDB/sense data size: they are dynamic (guest controlled) in QEMU */
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/scsi/scsi.h"
24 #include "chardev/char-fe.h"
25 #include "qapi/qapi-types-virtio.h"
26 #include "system/iothread.h"
27
28 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
29 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON)
30
31 #define TYPE_VIRTIO_SCSI "virtio-scsi-device"
32 OBJECT_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 /* Number of virtqueues that are always present */
39 #define VIRTIO_SCSI_VQ_NUM_FIXED 2
40
41 #define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX
42
43 typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
44 typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
45 typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
46 typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
47 typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
48 typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
49 typedef struct virtio_scsi_event VirtIOSCSIEvent;
50 typedef struct virtio_scsi_config VirtIOSCSIConfig;
51
52 struct VirtIOSCSIConf {
53 uint32_t num_queues;
54 uint32_t virtqueue_size;
55 bool worker_per_virtqueue;
56 bool seg_max_adjust;
57 uint32_t max_sectors;
58 uint32_t cmd_per_lun;
59 char *vhostfd;
60 char *wwpn;
61 CharFrontend chardev;
62 uint32_t boot_tpgt;
63 IOThread *iothread;
64 IOThreadVirtQueueMappingList *iothread_vq_mapping_list;
65 };
66
67 struct VirtIOSCSI;
68
69 struct 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
80 struct VirtIOSCSIReq;
81
82 struct VirtIOSCSI {
83 VirtIOSCSICommon parent_obj;
84
85 SCSIBus bus;
86 int resetting; /* written from main loop thread, read from any thread */
87
88 QemuMutex event_lock; /* protects event_vq and events_dropped */
89 bool events_dropped;
90
91 QemuMutex ctrl_lock; /* protects ctrl_vq */
92
93 /* Fields for dataplane below */
94 AioContext **vq_aio_context; /* per-virtqueue AioContext pointer */
95
96 bool dataplane_started;
97 bool dataplane_starting;
98 bool dataplane_stopping;
99 bool dataplane_fenced;
100 uint32_t host_features;
101 };
102
103 void virtio_scsi_common_realize(DeviceState *dev,
104 VirtIOHandleOutput ctrl,
105 VirtIOHandleOutput evt,
106 VirtIOHandleOutput cmd,
107 Error **errp);
108
109 void virtio_scsi_common_unrealize(DeviceState *dev);
110
111 void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
112 void virtio_scsi_dataplane_cleanup(VirtIOSCSI *s);
113 int virtio_scsi_dataplane_start(VirtIODevice *s);
114 void virtio_scsi_dataplane_stop(VirtIODevice *s);
115
116 #endif /* QEMU_VIRTIO_SCSI_H */