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18#include "qemu/osdep.h"
19#include "qapi/error.h"
20#include "qemu/error-report.h"
21#include "qom/object.h"
22#include "hw/fw-path-provider.h"
23#include "hw/qdev-core.h"
24#include "hw/virtio/vhost.h"
25#include "hw/virtio/vhost-backend.h"
26#include "hw/virtio/vhost-user-scsi.h"
27#include "hw/virtio/virtio.h"
28#include "hw/virtio/virtio-access.h"
29#include "chardev/char-fe.h"
30
31
32static const int user_feature_bits[] = {
33 VIRTIO_F_NOTIFY_ON_EMPTY,
34 VIRTIO_RING_F_INDIRECT_DESC,
35 VIRTIO_RING_F_EVENT_IDX,
36 VIRTIO_SCSI_F_HOTPLUG,
37 VHOST_INVALID_FEATURE_BIT
38};
39
40static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
41{
42 VHostUserSCSI *s = (VHostUserSCSI *)vdev;
43 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
44 bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
45
46 if (vsc->dev.started == start) {
47 return;
48 }
49
50 if (start) {
51 int ret;
52
53 ret = vhost_scsi_common_start(vsc);
54 if (ret < 0) {
55 error_report("unable to start vhost-user-scsi: %s", strerror(-ret));
56 exit(1);
57 }
58 } else {
59 vhost_scsi_common_stop(vsc);
60 }
61}
62
63static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
64{
65}
66
67static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
68{
69 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
70 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
71 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
72 Error *err = NULL;
73 int ret;
74
75 if (!vs->conf.chardev.chr) {
76 error_setg(errp, "vhost-user-scsi: missing chardev");
77 return;
78 }
79
80 virtio_scsi_common_realize(dev, vhost_dummy_handle_output,
81 vhost_dummy_handle_output,
82 vhost_dummy_handle_output, &err);
83 if (err != NULL) {
84 error_propagate(errp, err);
85 return;
86 }
87
88 if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
89 return;
90 }
91
92 vsc->dev.nvqs = 2 + vs->conf.num_queues;
93 vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
94 vsc->dev.vq_index = 0;
95 vsc->dev.backend_features = 0;
96
97 ret = vhost_dev_init(&vsc->dev, &s->vhost_user,
98 VHOST_BACKEND_TYPE_USER, 0);
99 if (ret < 0) {
100 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
101 strerror(-ret));
102 vhost_user_cleanup(&s->vhost_user);
103 return;
104 }
105
106
107 vsc->channel = 0;
108 vsc->lun = 0;
109 vsc->target = vs->conf.boot_tpgt;
110}
111
112static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
113{
114 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
115 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
116 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
117 struct vhost_virtqueue *vqs = vsc->dev.vqs;
118
119
120 vhost_user_scsi_set_status(vdev, 0);
121
122 vhost_dev_cleanup(&vsc->dev);
123 g_free(vqs);
124
125 virtio_scsi_common_unrealize(dev, errp);
126 vhost_user_cleanup(&s->vhost_user);
127}
128
129static Property vhost_user_scsi_properties[] = {
130 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
131 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
132 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
133 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
134 128),
135 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
136 0xFFFF),
137 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
138 DEFINE_PROP_BIT64("hotplug", VHostSCSICommon, host_features,
139 VIRTIO_SCSI_F_HOTPLUG,
140 true),
141 DEFINE_PROP_BIT64("param_change", VHostSCSICommon, host_features,
142 VIRTIO_SCSI_F_CHANGE,
143 true),
144 DEFINE_PROP_BIT64("t10_pi", VHostSCSICommon, host_features,
145 VIRTIO_SCSI_F_T10_PI,
146 false),
147 DEFINE_PROP_END_OF_LIST(),
148};
149
150static const VMStateDescription vmstate_vhost_scsi = {
151 .name = "virtio-scsi",
152 .minimum_version_id = 1,
153 .version_id = 1,
154 .fields = (VMStateField[]) {
155 VMSTATE_VIRTIO_DEVICE,
156 VMSTATE_END_OF_LIST()
157 },
158};
159
160static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
161{
162 DeviceClass *dc = DEVICE_CLASS(klass);
163 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
164 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
165
166 dc->props = vhost_user_scsi_properties;
167 dc->vmsd = &vmstate_vhost_scsi;
168 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
169 vdc->realize = vhost_user_scsi_realize;
170 vdc->unrealize = vhost_user_scsi_unrealize;
171 vdc->get_features = vhost_scsi_common_get_features;
172 vdc->set_config = vhost_scsi_common_set_config;
173 vdc->set_status = vhost_user_scsi_set_status;
174 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
175}
176
177static void vhost_user_scsi_instance_init(Object *obj)
178{
179 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
180
181 vsc->feature_bits = user_feature_bits;
182
183
184 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
185 DEVICE(vsc), NULL);
186}
187
188static const TypeInfo vhost_user_scsi_info = {
189 .name = TYPE_VHOST_USER_SCSI,
190 .parent = TYPE_VHOST_SCSI_COMMON,
191 .instance_size = sizeof(VHostUserSCSI),
192 .class_init = vhost_user_scsi_class_init,
193 .instance_init = vhost_user_scsi_instance_init,
194 .interfaces = (InterfaceInfo[]) {
195 { TYPE_FW_PATH_PROVIDER },
196 { }
197 },
198};
199
200static void virtio_register_types(void)
201{
202 type_register_static(&vhost_user_scsi_info);
203}
204
205type_init(virtio_register_types)
206
