1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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 struct vhost_virtqueue *vqs = NULL;
73 Error *err = NULL;
74 int ret;
75
76 if (!vs->conf.chardev.chr) {
77 error_setg(errp, "vhost-user-scsi: missing chardev");
78 return;
79 }
80
81 virtio_scsi_common_realize(dev, vhost_dummy_handle_output,
82 vhost_dummy_handle_output,
83 vhost_dummy_handle_output, &err);
84 if (err != NULL) {
85 error_propagate(errp, err);
86 return;
87 }
88
89 if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
90 goto free_virtio;
91 }
92
93 vsc->dev.nvqs = 2 + vs->conf.num_queues;
94 vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
95 vsc->dev.vq_index = 0;
96 vsc->dev.backend_features = 0;
97 vqs = vsc->dev.vqs;
98
99 ret = vhost_dev_init(&vsc->dev, &s->vhost_user,
100 VHOST_BACKEND_TYPE_USER, 0);
101 if (ret < 0) {
102 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
103 strerror(-ret));
104 goto free_vhost;
105 }
106
107
108 vsc->channel = 0;
109 vsc->lun = 0;
110 vsc->target = vs->conf.boot_tpgt;
111
112 return;
113
114free_vhost:
115 vhost_user_cleanup(&s->vhost_user);
116 g_free(vqs);
117free_virtio:
118 virtio_scsi_common_unrealize(dev);
119}
120
121static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
122{
123 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
124 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
125 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
126 struct vhost_virtqueue *vqs = vsc->dev.vqs;
127
128
129 vhost_user_scsi_set_status(vdev, 0);
130
131 vhost_dev_cleanup(&vsc->dev);
132 g_free(vqs);
133
134 virtio_scsi_common_unrealize(dev);
135 vhost_user_cleanup(&s->vhost_user);
136}
137
138static Property vhost_user_scsi_properties[] = {
139 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
140 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
141 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
142 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
143 128),
144 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
145 0xFFFF),
146 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
147 DEFINE_PROP_BIT64("hotplug", VHostSCSICommon, host_features,
148 VIRTIO_SCSI_F_HOTPLUG,
149 true),
150 DEFINE_PROP_BIT64("param_change", VHostSCSICommon, host_features,
151 VIRTIO_SCSI_F_CHANGE,
152 true),
153 DEFINE_PROP_BIT64("t10_pi", VHostSCSICommon, host_features,
154 VIRTIO_SCSI_F_T10_PI,
155 false),
156 DEFINE_PROP_END_OF_LIST(),
157};
158
159static const VMStateDescription vmstate_vhost_scsi = {
160 .name = "virtio-scsi",
161 .minimum_version_id = 1,
162 .version_id = 1,
163 .fields = (VMStateField[]) {
164 VMSTATE_VIRTIO_DEVICE,
165 VMSTATE_END_OF_LIST()
166 },
167};
168
169static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
170{
171 DeviceClass *dc = DEVICE_CLASS(klass);
172 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
173 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
174
175 dc->props = vhost_user_scsi_properties;
176 dc->vmsd = &vmstate_vhost_scsi;
177 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
178 vdc->realize = vhost_user_scsi_realize;
179 vdc->unrealize = vhost_user_scsi_unrealize;
180 vdc->get_features = vhost_scsi_common_get_features;
181 vdc->set_config = vhost_scsi_common_set_config;
182 vdc->set_status = vhost_user_scsi_set_status;
183 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
184}
185
186static void vhost_user_scsi_instance_init(Object *obj)
187{
188 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
189
190 vsc->feature_bits = user_feature_bits;
191
192
193 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
194 DEVICE(vsc), NULL);
195}
196
197static const TypeInfo vhost_user_scsi_info = {
198 .name = TYPE_VHOST_USER_SCSI,
199 .parent = TYPE_VHOST_SCSI_COMMON,
200 .instance_size = sizeof(VHostUserSCSI),
201 .class_init = vhost_user_scsi_class_init,
202 .instance_init = vhost_user_scsi_instance_init,
203 .interfaces = (InterfaceInfo[]) {
204 { TYPE_FW_PATH_PROVIDER },
205 { }
206 },
207};
208
209static void virtio_register_types(void)
210{
211 type_register_static(&vhost_user_scsi_info);
212}
213
214type_init(virtio_register_types)
215