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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 VhostUserState *user;
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 user = vhost_user_init();
90 if (!user) {
91 error_setg(errp, "vhost-user-scsi: failed to init vhost_user");
92 return;
93 }
94 user->chr = &vs->conf.chardev;
95
96 vsc->dev.nvqs = 2 + vs->conf.num_queues;
97 vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
98 vsc->dev.vq_index = 0;
99 vsc->dev.backend_features = 0;
100
101 ret = vhost_dev_init(&vsc->dev, user,
102 VHOST_BACKEND_TYPE_USER, 0);
103 if (ret < 0) {
104 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
105 strerror(-ret));
106 vhost_user_cleanup(user);
107 g_free(user);
108 return;
109 }
110
111 s->vhost_user = user;
112
113
114 vsc->channel = 0;
115 vsc->lun = 0;
116 vsc->target = vs->conf.boot_tpgt;
117}
118
119static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
120{
121 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
122 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
123 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
124
125
126 vhost_user_scsi_set_status(vdev, 0);
127
128 vhost_dev_cleanup(&vsc->dev);
129 g_free(vsc->dev.vqs);
130
131 virtio_scsi_common_unrealize(dev, errp);
132
133 if (s->vhost_user) {
134 vhost_user_cleanup(s->vhost_user);
135 g_free(s->vhost_user);
136 s->vhost_user = NULL;
137 }
138}
139
140static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev,
141 uint64_t features, Error **errp)
142{
143 VHostUserSCSI *s = VHOST_USER_SCSI(vdev);
144
145
146 features |= s->host_features;
147
148 return vhost_scsi_common_get_features(vdev, features, errp);
149}
150
151static Property vhost_user_scsi_properties[] = {
152 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
153 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
154 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
155 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
156 128),
157 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
158 0xFFFF),
159 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
160 DEFINE_PROP_BIT64("hotplug", VHostUserSCSI, host_features,
161 VIRTIO_SCSI_F_HOTPLUG,
162 true),
163 DEFINE_PROP_BIT64("param_change", VHostUserSCSI, host_features,
164 VIRTIO_SCSI_F_CHANGE,
165 true),
166 DEFINE_PROP_END_OF_LIST(),
167};
168
169static const VMStateDescription vmstate_vhost_scsi = {
170 .name = "virtio-scsi",
171 .minimum_version_id = 1,
172 .version_id = 1,
173 .fields = (VMStateField[]) {
174 VMSTATE_VIRTIO_DEVICE,
175 VMSTATE_END_OF_LIST()
176 },
177};
178
179static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
180{
181 DeviceClass *dc = DEVICE_CLASS(klass);
182 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
183 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
184
185 dc->props = vhost_user_scsi_properties;
186 dc->vmsd = &vmstate_vhost_scsi;
187 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
188 vdc->realize = vhost_user_scsi_realize;
189 vdc->unrealize = vhost_user_scsi_unrealize;
190 vdc->get_features = vhost_user_scsi_get_features;
191 vdc->set_config = vhost_scsi_common_set_config;
192 vdc->set_status = vhost_user_scsi_set_status;
193 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
194}
195
196static void vhost_user_scsi_instance_init(Object *obj)
197{
198 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
199
200 vsc->feature_bits = user_feature_bits;
201
202
203 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
204 DEVICE(vsc), NULL);
205}
206
207static const TypeInfo vhost_user_scsi_info = {
208 .name = TYPE_VHOST_USER_SCSI,
209 .parent = TYPE_VHOST_SCSI_COMMON,
210 .instance_size = sizeof(VHostUserSCSI),
211 .class_init = vhost_user_scsi_class_init,
212 .instance_init = vhost_user_scsi_instance_init,
213 .interfaces = (InterfaceInfo[]) {
214 { TYPE_FW_PATH_PROVIDER },
215 { }
216 },
217};
218
219static void virtio_register_types(void)
220{
221 type_register_static(&vhost_user_scsi_info);
222}
223
224type_init(virtio_register_types)
225
