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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/qdev-properties.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#include "sysemu/sysemu.h"
32
33
34static const int user_feature_bits[] = {
35 VIRTIO_F_NOTIFY_ON_EMPTY,
36 VIRTIO_RING_F_INDIRECT_DESC,
37 VIRTIO_RING_F_EVENT_IDX,
38 VIRTIO_SCSI_F_HOTPLUG,
39 VHOST_INVALID_FEATURE_BIT
40};
41
42static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
43{
44 VHostUserSCSI *s = (VHostUserSCSI *)vdev;
45 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
46 bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
47
48 if (vsc->dev.started == start) {
49 return;
50 }
51
52 if (start) {
53 int ret;
54
55 ret = vhost_scsi_common_start(vsc);
56 if (ret < 0) {
57 error_report("unable to start vhost-user-scsi: %s", strerror(-ret));
58 exit(1);
59 }
60 } else {
61 vhost_scsi_common_stop(vsc);
62 }
63}
64
65static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
66{
67}
68
69static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
70{
71 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
72 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
73 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
74 struct vhost_virtqueue *vqs = NULL;
75 Error *err = NULL;
76 int ret;
77
78 if (!vs->conf.chardev.chr) {
79 error_setg(errp, "vhost-user-scsi: missing chardev");
80 return;
81 }
82
83 virtio_scsi_common_realize(dev, vhost_dummy_handle_output,
84 vhost_dummy_handle_output,
85 vhost_dummy_handle_output, &err);
86 if (err != NULL) {
87 error_propagate(errp, err);
88 return;
89 }
90
91 if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
92 goto free_virtio;
93 }
94
95 vsc->dev.nvqs = 2 + vs->conf.num_queues;
96 vsc->dev.vqs = g_new0(struct vhost_virtqueue, vsc->dev.nvqs);
97 vsc->dev.vq_index = 0;
98 vsc->dev.backend_features = 0;
99 vqs = vsc->dev.vqs;
100
101 ret = vhost_dev_init(&vsc->dev, &s->vhost_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 goto free_vhost;
107 }
108
109
110 vsc->channel = 0;
111 vsc->lun = 0;
112 vsc->target = vs->conf.boot_tpgt;
113
114 return;
115
116free_vhost:
117 vhost_user_cleanup(&s->vhost_user);
118 g_free(vqs);
119free_virtio:
120 virtio_scsi_common_unrealize(dev);
121}
122
123static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
124{
125 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
126 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
127 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
128 struct vhost_virtqueue *vqs = vsc->dev.vqs;
129
130
131 vhost_user_scsi_set_status(vdev, 0);
132
133 vhost_dev_cleanup(&vsc->dev);
134 g_free(vqs);
135
136 virtio_scsi_common_unrealize(dev);
137 vhost_user_cleanup(&s->vhost_user);
138}
139
140static Property vhost_user_scsi_properties[] = {
141 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
142 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
143 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
144 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
145 128),
146 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
147 0xFFFF),
148 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
149 DEFINE_PROP_BIT64("hotplug", VHostSCSICommon, host_features,
150 VIRTIO_SCSI_F_HOTPLUG,
151 true),
152 DEFINE_PROP_BIT64("param_change", VHostSCSICommon, host_features,
153 VIRTIO_SCSI_F_CHANGE,
154 true),
155 DEFINE_PROP_BIT64("t10_pi", VHostSCSICommon, host_features,
156 VIRTIO_SCSI_F_T10_PI,
157 false),
158 DEFINE_PROP_END_OF_LIST(),
159};
160
161static const VMStateDescription vmstate_vhost_scsi = {
162 .name = "virtio-scsi",
163 .minimum_version_id = 1,
164 .version_id = 1,
165 .fields = (VMStateField[]) {
166 VMSTATE_VIRTIO_DEVICE,
167 VMSTATE_END_OF_LIST()
168 },
169};
170
171static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
172{
173 DeviceClass *dc = DEVICE_CLASS(klass);
174 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
175 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
176
177 dc->props = vhost_user_scsi_properties;
178 dc->vmsd = &vmstate_vhost_scsi;
179 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
180 vdc->realize = vhost_user_scsi_realize;
181 vdc->unrealize = vhost_user_scsi_unrealize;
182 vdc->get_features = vhost_scsi_common_get_features;
183 vdc->set_config = vhost_scsi_common_set_config;
184 vdc->set_status = vhost_user_scsi_set_status;
185 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
186}
187
188static void vhost_user_scsi_instance_init(Object *obj)
189{
190 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
191
192 vsc->feature_bits = user_feature_bits;
193
194
195 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
196 DEVICE(vsc), NULL);
197}
198
199static const TypeInfo vhost_user_scsi_info = {
200 .name = TYPE_VHOST_USER_SCSI,
201 .parent = TYPE_VHOST_SCSI_COMMON,
202 .instance_size = sizeof(VHostUserSCSI),
203 .class_init = vhost_user_scsi_class_init,
204 .instance_init = vhost_user_scsi_instance_init,
205 .interfaces = (InterfaceInfo[]) {
206 { TYPE_FW_PATH_PROVIDER },
207 { }
208 },
209};
210
211static void virtio_register_types(void)
212{
213 type_register_static(&vhost_user_scsi_info);
214}
215
216type_init(virtio_register_types)
217
