1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* QEMU NVM Express Virtual Namespace
*
* Copyright (c) 2019 CNEX Labs
* Copyright (c) 2020 Samsung Electronics
*
* Authors:
* Klaus Jensen <k.jensen@samsung.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See the
* COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/cutils.h"
#include "qemu/log.h"
#include "hw/block/block.h"
#include "hw/pci/pci.h"
#include "sysemu/sysemu.h"
#include "sysemu/block-backend.h"
#include "qapi/error.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-core.h"
#include "nvme.h"
#include "nvme-ns.h"
static void nvme_ns_init(NvmeNamespace *ns)
{
NvmeIdNs *id_ns = &ns->id_ns;
int lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
if (blk_get_flags(ns->blkconf.blk) & BDRV_O_UNMAP) {
ns->id_ns.dlfeat = 0x9;
}
id_ns->lbaf[lba_index].ds = 31 - clz32(ns->blkconf.logical_block_size);
id_ns->nsze = cpu_to_le64(nvme_ns_nlbas(ns));
/* no thin provisioning */
id_ns->ncap = id_ns->nsze;
id_ns->nuse = id_ns->ncap;
}
static int nvme_ns_init_blk(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
{
if (!blkconf_blocksizes(&ns->blkconf, errp)) {
return -1;
}
if (!blkconf_apply_backend_options(&ns->blkconf,
blk_is_read_only(ns->blkconf.blk),
false, errp)) {
return -1;
}
ns->size = blk_getlength(ns->blkconf.blk);
if (ns->size < 0) {
error_setg_errno(errp, -ns->size, "could not get blockdev size");
return -1;
}
if (blk_enable_write_cache(ns->blkconf.blk)) {
n->features.vwc = 0x1;
}
return 0;
}
static int nvme_ns_check_constraints(NvmeNamespace *ns, Error **errp)
{
if (!ns->blkconf.blk) {
error_setg(errp, "block backend not configured");
return -1;
}
return 0;
}
int nvme_ns_setup(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
{
if (nvme_ns_check_constraints(ns, errp)) {
return -1;
}
if (nvme_ns_init_blk(n, ns, errp)) {
return -1;
}
nvme_ns_init(ns);
if (nvme_register_namespace(n, ns, errp)) {
return -1;
}
return 0;
}
void nvme_ns_drain(NvmeNamespace *ns)
{
blk_drain(ns->blkconf.blk);
}
void nvme_ns_flush(NvmeNamespace *ns)
{
blk_flush(ns->blkconf.blk);
}
static void nvme_ns_realize(DeviceState *dev, Error **errp)
{
NvmeNamespace *ns = NVME_NS(dev);
BusState *s = qdev_get_parent_bus(dev);
NvmeCtrl *n = NVME(s->parent);
Error *local_err = NULL;
if (nvme_ns_setup(n, ns, &local_err)) {
error_propagate_prepend(errp, local_err,
"could not setup namespace: ");
return;
}
}
static Property nvme_ns_props[] = {
DEFINE_BLOCK_PROPERTIES(NvmeNamespace, blkconf),
DEFINE_PROP_UINT32("nsid", NvmeNamespace, params.nsid, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void nvme_ns_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
dc->bus_type = TYPE_NVME_BUS;
dc->realize = nvme_ns_realize;
device_class_set_props(dc, nvme_ns_props);
dc->desc = "Virtual NVMe namespace";
}
static void nvme_ns_instance_init(Object *obj)
{
NvmeNamespace *ns = NVME_NS(obj);
char *bootindex = g_strdup_printf("/namespace@%d,0", ns->params.nsid);
device_add_bootindex_property(obj, &ns->bootindex, "bootindex",
bootindex, DEVICE(obj));
g_free(bootindex);
}
static const TypeInfo nvme_ns_info = {
.name = TYPE_NVME_NS,
.parent = TYPE_DEVICE,
.class_init = nvme_ns_class_init,
.instance_size = sizeof(NvmeNamespace),
.instance_init = nvme_ns_instance_init,
};
static void nvme_ns_register_types(void)
{
type_register_static(&nvme_ns_info);
}
type_init(nvme_ns_register_types)
|
