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 "qemu/typedefs.h"
22#include "qom/object.h"
23#include "hw/fw-path-provider.h"
24#include "hw/qdev-core.h"
25#include "hw/virtio/vhost.h"
26#include "hw/virtio/vhost-backend.h"
27#include "hw/virtio/vhost-user-scsi.h"
28#include "hw/virtio/virtio.h"
29#include "hw/virtio/virtio-access.h"
30#include "chardev/char-fe.h"
31
32
33static const int user_feature_bits[] = {
34 VIRTIO_F_NOTIFY_ON_EMPTY,
35 VIRTIO_RING_F_INDIRECT_DESC,
36 VIRTIO_RING_F_EVENT_IDX,
37 VIRTIO_SCSI_F_HOTPLUG,
38 VHOST_INVALID_FEATURE_BIT
39};
40
41static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
42{
43 VHostUserSCSI *s = (VHostUserSCSI *)vdev;
44 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
45 bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
46
47 if (vsc->dev.started == start) {
48 return;
49 }
50
51 if (start) {
52 int ret;
53
54 ret = vhost_scsi_common_start(vsc);
55 if (ret < 0) {
56 error_report("unable to start vhost-user-scsi: %s", strerror(-ret));
57 exit(1);
58 }
59 } else {
60 vhost_scsi_common_stop(vsc);
61 }
62}
63
64static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
65{
66}
67
68static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
69{
70 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
71 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
72 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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 vsc->dev.nvqs = 2 + vs->conf.num_queues;
90 vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
91 vsc->dev.vq_index = 0;
92 vsc->dev.backend_features = 0;
93
94 ret = vhost_dev_init(&vsc->dev, (void *)&vs->conf.chardev,
95 VHOST_BACKEND_TYPE_USER, 0);
96 if (ret < 0) {
97 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
98 strerror(-ret));
99 return;
100 }
101
102
103 vsc->channel = 0;
104 vsc->lun = 0;
105 vsc->target = vs->conf.boot_tpgt;
106}
107
108static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
109{
110 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
111 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
112 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
113
114
115 vhost_user_scsi_set_status(vdev, 0);
116
117 vhost_dev_cleanup(&vsc->dev);
118 g_free(vsc->dev.vqs);
119
120 virtio_scsi_common_unrealize(dev, errp);
121}
122
123static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev,
124 uint64_t features, Error **errp)
125{
126 VHostUserSCSI *s = VHOST_USER_SCSI(vdev);
127
128
129 features |= s->host_features;
130
131 return vhost_scsi_common_get_features(vdev, features, errp);
132}
133
134static Property vhost_user_scsi_properties[] = {
135 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
136 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
137 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
138 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
139 128),
140 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
141 0xFFFF),
142 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
143 DEFINE_PROP_BIT64("hotplug", VHostUserSCSI, host_features,
144 VIRTIO_SCSI_F_HOTPLUG,
145 true),
146 DEFINE_PROP_BIT64("param_change", VHostUserSCSI, host_features,
147 VIRTIO_SCSI_F_CHANGE,
148 true),
149 DEFINE_PROP_END_OF_LIST(),
150};
151
152static const VMStateDescription vmstate_vhost_scsi = {
153 .name = "virtio-scsi",
154 .minimum_version_id = 1,
155 .version_id = 1,
156 .fields = (VMStateField[]) {
157 VMSTATE_VIRTIO_DEVICE,
158 VMSTATE_END_OF_LIST()
159 },
160};
161
162static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
163{
164 DeviceClass *dc = DEVICE_CLASS(klass);
165 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
166 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
167
168 dc->props = vhost_user_scsi_properties;
169 dc->vmsd = &vmstate_vhost_scsi;
170 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
171 vdc->realize = vhost_user_scsi_realize;
172 vdc->unrealize = vhost_user_scsi_unrealize;
173 vdc->get_features = vhost_user_scsi_get_features;
174 vdc->set_config = vhost_scsi_common_set_config;
175 vdc->set_status = vhost_user_scsi_set_status;
176 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
177}
178
179static void vhost_user_scsi_instance_init(Object *obj)
180{
181 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
182
183 vsc->feature_bits = user_feature_bits;
184
185
186 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
187 DEVICE(vsc), NULL);
188}
189
190static const TypeInfo vhost_user_scsi_info = {
191 .name = TYPE_VHOST_USER_SCSI,
192 .parent = TYPE_VHOST_SCSI_COMMON,
193 .instance_size = sizeof(VHostUserSCSI),
194 .class_init = vhost_user_scsi_class_init,
195 .instance_init = vhost_user_scsi_instance_init,
196 .interfaces = (InterfaceInfo[]) {
197 { TYPE_FW_PATH_PROVIDER },
198 { }
199 },
200};
201
202static void virtio_register_types(void)
203{
204 type_register_static(&vhost_user_scsi_info);
205}
206
207type_init(virtio_register_types)
208
