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Felipe Franciosif12c1eb2017-03-02 10:25:52 -08001/*
2 * vhost-user-scsi host device
3 *
4 * Copyright (c) 2016 Nutanix Inc. All rights reserved.
5 *
6 * Author:
7 * Felipe Franciosi <felipe@nutanix.com>
8 *
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>
12 *
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.
15 *
16 */
17
18#include "qemu/osdep.h"
19#include "qapi/error.h"
20#include "qemu/error-report.h"
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080021#include "hw/fw-path-provider.h"
22#include "hw/qdev-core.h"
Markus Armbrustera27bd6c2019-08-12 07:23:51 +020023#include "hw/qdev-properties.h"
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080024#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"
Markus Armbruster2f780b62019-08-12 07:23:58 +020030#include "sysemu/sysemu.h"
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080031
32/* Features supported by the host application */
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
Raphael Norwitzf0472432019-10-29 17:38:03 -040041enum VhostUserProtocolFeature {
42 VHOST_USER_PROTOCOL_F_RESET_DEVICE = 13,
43};
44
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080045static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
46{
47 VHostUserSCSI *s = (VHostUserSCSI *)vdev;
48 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
49 bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
50
51 if (vsc->dev.started == start) {
52 return;
53 }
54
55 if (start) {
56 int ret;
57
58 ret = vhost_scsi_common_start(vsc);
59 if (ret < 0) {
60 error_report("unable to start vhost-user-scsi: %s", strerror(-ret));
61 exit(1);
62 }
63 } else {
64 vhost_scsi_common_stop(vsc);
65 }
66}
67
Raphael Norwitzf0472432019-10-29 17:38:03 -040068static void vhost_user_scsi_reset(VirtIODevice *vdev)
69{
70 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
71 struct vhost_dev *dev = &vsc->dev;
72
73 /*
74 * Historically, reset was not implemented so only reset devices
75 * that are expecting it.
76 */
77 if (!virtio_has_feature(dev->protocol_features,
78 VHOST_USER_PROTOCOL_F_RESET_DEVICE)) {
79 return;
80 }
81
82 if (dev->vhost_ops->vhost_reset_device) {
83 dev->vhost_ops->vhost_reset_device(dev);
84 }
85}
86
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080087static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
88{
89}
90
91static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
92{
93 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
94 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
95 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
Jie Wang386cff42019-04-30 15:15:00 +080096 struct vhost_virtqueue *vqs = NULL;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -080097 Error *err = NULL;
98 int ret;
99
100 if (!vs->conf.chardev.chr) {
101 error_setg(errp, "vhost-user-scsi: missing chardev");
102 return;
103 }
104
105 virtio_scsi_common_realize(dev, vhost_dummy_handle_output,
106 vhost_dummy_handle_output,
107 vhost_dummy_handle_output, &err);
108 if (err != NULL) {
109 error_propagate(errp, err);
110 return;
111 }
112
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100113 if (!vhost_user_init(&s->vhost_user, &vs->conf.chardev, errp)) {
Xie Yongji68fa7ca2019-07-17 08:46:06 +0800114 goto free_virtio;
Tiwei Bie4d0cf552018-05-24 18:33:33 +0800115 }
Tiwei Bie4d0cf552018-05-24 18:33:33 +0800116
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800117 vsc->dev.nvqs = 2 + vs->conf.num_queues;
Raphael Norwitz5d4c1ed2019-06-11 17:35:17 -0700118 vsc->dev.vqs = g_new0(struct vhost_virtqueue, vsc->dev.nvqs);
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800119 vsc->dev.vq_index = 0;
120 vsc->dev.backend_features = 0;
Jie Wang386cff42019-04-30 15:15:00 +0800121 vqs = vsc->dev.vqs;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800122
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100123 ret = vhost_dev_init(&vsc->dev, &s->vhost_user,
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800124 VHOST_BACKEND_TYPE_USER, 0);
125 if (ret < 0) {
126 error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
127 strerror(-ret));
Xie Yongji68fa7ca2019-07-17 08:46:06 +0800128 goto free_vhost;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800129 }
130
131 /* Channel and lun both are 0 for bootable vhost-user-scsi disk */
132 vsc->channel = 0;
133 vsc->lun = 0;
134 vsc->target = vs->conf.boot_tpgt;
Xie Yongji68fa7ca2019-07-17 08:46:06 +0800135
136 return;
137
138free_vhost:
139 vhost_user_cleanup(&s->vhost_user);
140 g_free(vqs);
141free_virtio:
142 virtio_scsi_common_unrealize(dev);
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800143}
144
Markus Armbrusterb69c3c22020-05-05 17:29:24 +0200145static void vhost_user_scsi_unrealize(DeviceState *dev)
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800146{
147 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
148 VHostUserSCSI *s = VHOST_USER_SCSI(dev);
149 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
Jian Wanga5390d92018-12-22 18:27:28 +0800150 struct vhost_virtqueue *vqs = vsc->dev.vqs;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800151
152 /* This will stop the vhost backend. */
153 vhost_user_scsi_set_status(vdev, 0);
154
155 vhost_dev_cleanup(&vsc->dev);
Jian Wanga5390d92018-12-22 18:27:28 +0800156 g_free(vqs);
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800157
Paolo Bonzini12e1dc42019-07-17 11:46:50 +0200158 virtio_scsi_common_unrealize(dev);
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100159 vhost_user_cleanup(&s->vhost_user);
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800160}
161
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800162static Property vhost_user_scsi_properties[] = {
163 DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
164 DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
165 DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
Dariusz Stojaczyk92003612017-11-14 17:28:36 +0100166 DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
167 128),
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800168 DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
169 0xFFFF),
170 DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
Greg Edwardseb5757f2018-08-08 13:52:33 -0600171 DEFINE_PROP_BIT64("hotplug", VHostSCSICommon, host_features,
172 VIRTIO_SCSI_F_HOTPLUG,
173 true),
174 DEFINE_PROP_BIT64("param_change", VHostSCSICommon, host_features,
175 VIRTIO_SCSI_F_CHANGE,
176 true),
Greg Edwardsf287fdd2018-08-08 13:52:35 -0600177 DEFINE_PROP_BIT64("t10_pi", VHostSCSICommon, host_features,
178 VIRTIO_SCSI_F_T10_PI,
179 false),
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800180 DEFINE_PROP_END_OF_LIST(),
181};
182
183static const VMStateDescription vmstate_vhost_scsi = {
184 .name = "virtio-scsi",
185 .minimum_version_id = 1,
186 .version_id = 1,
187 .fields = (VMStateField[]) {
188 VMSTATE_VIRTIO_DEVICE,
189 VMSTATE_END_OF_LIST()
190 },
191};
192
193static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
194{
195 DeviceClass *dc = DEVICE_CLASS(klass);
196 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
197 FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
198
Marc-André Lureau4f67d302020-01-10 19:30:32 +0400199 device_class_set_props(dc, vhost_user_scsi_properties);
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800200 dc->vmsd = &vmstate_vhost_scsi;
201 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
202 vdc->realize = vhost_user_scsi_realize;
203 vdc->unrealize = vhost_user_scsi_unrealize;
Greg Edwardsb1110d82018-08-08 13:52:34 -0600204 vdc->get_features = vhost_scsi_common_get_features;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800205 vdc->set_config = vhost_scsi_common_set_config;
206 vdc->set_status = vhost_user_scsi_set_status;
Raphael Norwitzf0472432019-10-29 17:38:03 -0400207 vdc->reset = vhost_user_scsi_reset;
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800208 fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
209}
210
211static void vhost_user_scsi_instance_init(Object *obj)
212{
213 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
214
215 vsc->feature_bits = user_feature_bits;
216
217 /* Add the bootindex property for this object */
218 device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
Markus Armbruster40c22812020-05-05 17:29:23 +0200219 DEVICE(vsc));
Felipe Franciosif12c1eb2017-03-02 10:25:52 -0800220}
221
222static const TypeInfo vhost_user_scsi_info = {
223 .name = TYPE_VHOST_USER_SCSI,
224 .parent = TYPE_VHOST_SCSI_COMMON,
225 .instance_size = sizeof(VHostUserSCSI),
226 .class_init = vhost_user_scsi_class_init,
227 .instance_init = vhost_user_scsi_instance_init,
228 .interfaces = (InterfaceInfo[]) {
229 { TYPE_FW_PATH_PROVIDER },
230 { }
231 },
232};
233
234static void virtio_register_types(void)
235{
236 type_register_static(&vhost_user_scsi_info);
237}
238
239type_init(virtio_register_types)