meson: convert hw/vfio
[qemu.git] / hw / scsi / vhost-scsi-common.c
1 /*
2 * vhost-scsi-common
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 "qemu/error-report.h"
20 #include "qemu/module.h"
21 #include "hw/virtio/vhost.h"
22 #include "hw/virtio/vhost-scsi-common.h"
23 #include "hw/virtio/virtio-scsi.h"
24 #include "hw/virtio/virtio-bus.h"
25 #include "hw/virtio/virtio-access.h"
26 #include "hw/fw-path-provider.h"
27
28 int vhost_scsi_common_start(VHostSCSICommon *vsc)
29 {
30 int ret, i;
31 VirtIODevice *vdev = VIRTIO_DEVICE(vsc);
32 BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
33 VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
34
35 if (!k->set_guest_notifiers) {
36 error_report("binding does not support guest notifiers");
37 return -ENOSYS;
38 }
39
40 ret = vhost_dev_enable_notifiers(&vsc->dev, vdev);
41 if (ret < 0) {
42 return ret;
43 }
44
45 ret = k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, true);
46 if (ret < 0) {
47 error_report("Error binding guest notifier");
48 goto err_host_notifiers;
49 }
50
51 vsc->dev.acked_features = vdev->guest_features;
52 ret = vhost_dev_start(&vsc->dev, vdev);
53 if (ret < 0) {
54 error_report("Error start vhost dev");
55 goto err_guest_notifiers;
56 }
57
58 /* guest_notifier_mask/pending not used yet, so just unmask
59 * everything here. virtio-pci will do the right thing by
60 * enabling/disabling irqfd.
61 */
62 for (i = 0; i < vsc->dev.nvqs; i++) {
63 vhost_virtqueue_mask(&vsc->dev, vdev, vsc->dev.vq_index + i, false);
64 }
65
66 return ret;
67
68 err_guest_notifiers:
69 k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, false);
70 err_host_notifiers:
71 vhost_dev_disable_notifiers(&vsc->dev, vdev);
72 return ret;
73 }
74
75 void vhost_scsi_common_stop(VHostSCSICommon *vsc)
76 {
77 VirtIODevice *vdev = VIRTIO_DEVICE(vsc);
78 BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
79 VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
80 int ret = 0;
81
82 vhost_dev_stop(&vsc->dev, vdev);
83
84 if (k->set_guest_notifiers) {
85 ret = k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, false);
86 if (ret < 0) {
87 error_report("vhost guest notifier cleanup failed: %d", ret);
88 }
89 }
90 assert(ret >= 0);
91
92 vhost_dev_disable_notifiers(&vsc->dev, vdev);
93 }
94
95 uint64_t vhost_scsi_common_get_features(VirtIODevice *vdev, uint64_t features,
96 Error **errp)
97 {
98 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
99
100 /* Turn on predefined features supported by this device */
101 features |= vsc->host_features;
102
103 return vhost_get_features(&vsc->dev, vsc->feature_bits, features);
104 }
105
106 void vhost_scsi_common_set_config(VirtIODevice *vdev, const uint8_t *config)
107 {
108 VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
109 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
110
111 if ((uint32_t)virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size ||
112 (uint32_t)virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
113 error_report("vhost-scsi does not support changing the sense data and "
114 "CDB sizes");
115 exit(1);
116 }
117 }
118
119 /*
120 * Implementation of an interface to adjust firmware path
121 * for the bootindex property handling.
122 */
123 char *vhost_scsi_common_get_fw_dev_path(FWPathProvider *p, BusState *bus,
124 DeviceState *dev)
125 {
126 VHostSCSICommon *vsc = VHOST_SCSI_COMMON(dev);
127 /* format: /channel@channel/vhost-scsi@target,lun */
128 return g_strdup_printf("/channel@%x/%s@%x,%x", vsc->channel,
129 qdev_fw_name(dev), vsc->target, vsc->lun);
130 }
131
132 static const TypeInfo vhost_scsi_common_info = {
133 .name = TYPE_VHOST_SCSI_COMMON,
134 .parent = TYPE_VIRTIO_SCSI_COMMON,
135 .instance_size = sizeof(VHostSCSICommon),
136 .abstract = true,
137 };
138
139 static void virtio_register_types(void)
140 {
141 type_register_static(&vhost_scsi_common_info);
142 }
143
144 type_init(virtio_register_types)