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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 vsc->dev.nvqs = 2 + vs->conf.num_queues;
89 vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
90 vsc->dev.vq_index = 0;
91 vsc->dev.backend_features = 0;
92
93 ret = vhost_dev_init(&vsc->dev, (void *)&vs->conf.chardev,
94 VHOST_BACKEND_TYPE_USER, 0);
95 if (ret < 0) {
96 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
97 strerror(-ret));
98 return;
99 }
100
101
102 vsc->channel = 0;
103 vsc->lun = 0;
104 vsc->target = vs->conf.boot_tpgt;
105}
106
107static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
108{
109 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
110 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
111 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
112
113
114 vhost_user_scsi_set_status(vdev, 0);
115
116 vhost_dev_cleanup(&vsc->dev);
117 g_free(vsc->dev.vqs);
118
119 virtio_scsi_common_unrealize(dev, errp);
120}
121
122static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev,
123 uint64_t features, Error **errp)
124{
125 VHostUserSCSI *s = VHOST_USER_SCSI(vdev);
126
127
128 features |= s->host_features;
129
130 return vhost_scsi_common_get_features(vdev, features, errp);
131}
132
133static Property vhost_user_scsi_properties[] = {
134 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
135 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
136 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
137 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
138 128),
139 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
140 0xFFFF),
141 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
142 DEFINE_PROP_BIT64("hotplug", VHostUserSCSI, host_features,
143 VIRTIO_SCSI_F_HOTPLUG,
144 true),
145 DEFINE_PROP_BIT64("param_change", VHostUserSCSI, host_features,
146 VIRTIO_SCSI_F_CHANGE,
147 true),
148 DEFINE_PROP_END_OF_LIST(),
149};
150
151static const VMStateDescription vmstate_vhost_scsi = {
152 .name = "virtio-scsi",
153 .minimum_version_id = 1,
154 .version_id = 1,
155 .fields = (VMStateField[]) {
156 VMSTATE_VIRTIO_DEVICE,
157 VMSTATE_END_OF_LIST()
158 },
159};
160
161static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
162{
163 DeviceClass *dc = DEVICE_CLASS(klass);
164 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
165 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
166
167 dc->props = vhost_user_scsi_properties;
168 dc->vmsd = &vmstate_vhost_scsi;
169 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
170 vdc->realize = vhost_user_scsi_realize;
171 vdc->unrealize = vhost_user_scsi_unrealize;
172 vdc->get_features = vhost_user_scsi_get_features;
173 vdc->set_config = vhost_scsi_common_set_config;
174 vdc->set_status = vhost_user_scsi_set_status;
175 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
176}
177
178static void vhost_user_scsi_instance_init(Object *obj)
179{
180 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
181
182 vsc->feature_bits = user_feature_bits;
183
184
185 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
186 DEVICE(vsc), NULL);
187}
188
189static const TypeInfo vhost_user_scsi_info = {
190 .name = TYPE_VHOST_USER_SCSI,
191 .parent = TYPE_VHOST_SCSI_COMMON,
192 .instance_size = sizeof(VHostUserSCSI),
193 .class_init = vhost_user_scsi_class_init,
194 .instance_init = vhost_user_scsi_instance_init,
195 .interfaces = (InterfaceInfo[]) {
196 { TYPE_FW_PATH_PROVIDER },
197 { }
198 },
199};
200
201static void virtio_register_types(void)
202{
203 type_register_static(&vhost_user_scsi_info);
204}
205
206type_init(virtio_register_types)
207