target/arm/kvm: host cpu: Add support for sve<N> properties
[qemu/ar7.git] / hw / scsi / vhost-user-scsi.c
blob6a6c15dd32f07e0c38b03b45ec96047bf8d0ad6f
1 /*
2 * vhost-user-scsi host device
4 * Copyright (c) 2016 Nutanix Inc. All rights reserved.
6 * Author:
7 * Felipe Franciosi <felipe@nutanix.com>
9 * This work is largely based on the "vhost-scsi" implementation by:
10 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
11 * Nicholas Bellinger <nab@risingtidesystems.com>
13 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
14 * See the COPYING.LIB file in the top-level directory.
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"
33 /* Features supported by the host application */
34 static 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
42 static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
44 VHostUserSCSI *s = (VHostUserSCSI *)vdev;
45 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
46 bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
48 if (vsc->dev.started == start) {
49 return;
52 if (start) {
53 int ret;
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);
60 } else {
61 vhost_scsi_common_stop(vsc);
65 static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
69 static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
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;
78 if (!vs->conf.chardev.chr) {
79 error_setg(errp, "vhost-user-scsi: missing chardev");
80 return;
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;
91 if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
92 goto free_virtio;
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;
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;
109 /* Channel and lun both are 0 for bootable vhost-user-scsi disk */
110 vsc->channel = 0;
111 vsc->lun = 0;
112 vsc->target = vs->conf.boot_tpgt;
114 return;
116 free_vhost:
117 vhost_user_cleanup(&s->vhost_user);
118 g_free(vqs);
119 free_virtio:
120 virtio_scsi_common_unrealize(dev);
123 static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
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;
130 /* This will stop the vhost backend. */
131 vhost_user_scsi_set_status(vdev, 0);
133 vhost_dev_cleanup(&vsc->dev);
134 g_free(vqs);
136 virtio_scsi_common_unrealize(dev);
137 vhost_user_cleanup(&s->vhost_user);
140 static 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(),
161 static 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()
171 static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
173 DeviceClass *dc = DEVICE_CLASS(klass);
174 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
175 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
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;
188 static void vhost_user_scsi_instance_init(Object *obj)
190 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
192 vsc->feature_bits = user_feature_bits;
194 /* Add the bootindex property for this object */
195 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
196 DEVICE(vsc), NULL);
199 static 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 },
211 static void virtio_register_types(void)
213 type_register_static(&vhost_user_scsi_info);
216 type_init(virtio_register_types)