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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* 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.
*
*/
#ifndef NVME_NS_H
#define NVME_NS_H
#define TYPE_NVME_NS "nvme-ns"
#define NVME_NS(obj) \
OBJECT_CHECK(NvmeNamespace, (obj), TYPE_NVME_NS)
typedef struct NvmeZone {
NvmeZoneDescr d;
uint64_t w_ptr;
QTAILQ_ENTRY(NvmeZone) entry;
} NvmeZone;
typedef struct NvmeNamespaceParams {
bool detached;
uint32_t nsid;
QemuUUID uuid;
uint16_t mssrl;
uint32_t mcl;
uint8_t msrc;
bool zoned;
bool cross_zone_read;
uint64_t zone_size_bs;
uint64_t zone_cap_bs;
uint32_t max_active_zones;
uint32_t max_open_zones;
uint32_t zd_extension_size;
} NvmeNamespaceParams;
typedef struct NvmeNamespace {
DeviceState parent_obj;
BlockConf blkconf;
int32_t bootindex;
int64_t size;
NvmeIdNs id_ns;
const uint32_t *iocs;
uint8_t csi;
NvmeSubsystem *subsys;
QTAILQ_ENTRY(NvmeNamespace) entry;
NvmeIdNsZoned *id_ns_zoned;
NvmeZone *zone_array;
QTAILQ_HEAD(, NvmeZone) exp_open_zones;
QTAILQ_HEAD(, NvmeZone) imp_open_zones;
QTAILQ_HEAD(, NvmeZone) closed_zones;
QTAILQ_HEAD(, NvmeZone) full_zones;
uint32_t num_zones;
uint64_t zone_size;
uint64_t zone_capacity;
uint32_t zone_size_log2;
uint8_t *zd_extensions;
int32_t nr_open_zones;
int32_t nr_active_zones;
NvmeNamespaceParams params;
struct {
uint32_t err_rec;
} features;
} NvmeNamespace;
static inline uint32_t nvme_nsid(NvmeNamespace *ns)
{
if (ns) {
return ns->params.nsid;
}
return -1;
}
static inline bool nvme_ns_shared(NvmeNamespace *ns)
{
return !!ns->subsys;
}
static inline NvmeLBAF *nvme_ns_lbaf(NvmeNamespace *ns)
{
NvmeIdNs *id_ns = &ns->id_ns;
return &id_ns->lbaf[NVME_ID_NS_FLBAS_INDEX(id_ns->flbas)];
}
static inline uint8_t nvme_ns_lbads(NvmeNamespace *ns)
{
return nvme_ns_lbaf(ns)->ds;
}
/* calculate the number of LBAs that the namespace can accomodate */
static inline uint64_t nvme_ns_nlbas(NvmeNamespace *ns)
{
return ns->size >> nvme_ns_lbads(ns);
}
/* convert an LBA to the equivalent in bytes */
static inline size_t nvme_l2b(NvmeNamespace *ns, uint64_t lba)
{
return lba << nvme_ns_lbads(ns);
}
typedef struct NvmeCtrl NvmeCtrl;
static inline NvmeZoneState nvme_get_zone_state(NvmeZone *zone)
{
return zone->d.zs >> 4;
}
static inline void nvme_set_zone_state(NvmeZone *zone, NvmeZoneState state)
{
zone->d.zs = state << 4;
}
static inline uint64_t nvme_zone_rd_boundary(NvmeNamespace *ns, NvmeZone *zone)
{
return zone->d.zslba + ns->zone_size;
}
static inline uint64_t nvme_zone_wr_boundary(NvmeZone *zone)
{
return zone->d.zslba + zone->d.zcap;
}
static inline bool nvme_wp_is_valid(NvmeZone *zone)
{
uint8_t st = nvme_get_zone_state(zone);
return st != NVME_ZONE_STATE_FULL &&
st != NVME_ZONE_STATE_READ_ONLY &&
st != NVME_ZONE_STATE_OFFLINE;
}
static inline uint8_t *nvme_get_zd_extension(NvmeNamespace *ns,
uint32_t zone_idx)
{
return &ns->zd_extensions[zone_idx * ns->params.zd_extension_size];
}
static inline void nvme_aor_inc_open(NvmeNamespace *ns)
{
assert(ns->nr_open_zones >= 0);
if (ns->params.max_open_zones) {
ns->nr_open_zones++;
assert(ns->nr_open_zones <= ns->params.max_open_zones);
}
}
static inline void nvme_aor_dec_open(NvmeNamespace *ns)
{
if (ns->params.max_open_zones) {
assert(ns->nr_open_zones > 0);
ns->nr_open_zones--;
}
assert(ns->nr_open_zones >= 0);
}
static inline void nvme_aor_inc_active(NvmeNamespace *ns)
{
assert(ns->nr_active_zones >= 0);
if (ns->params.max_active_zones) {
ns->nr_active_zones++;
assert(ns->nr_active_zones <= ns->params.max_active_zones);
}
}
static inline void nvme_aor_dec_active(NvmeNamespace *ns)
{
if (ns->params.max_active_zones) {
assert(ns->nr_active_zones > 0);
ns->nr_active_zones--;
assert(ns->nr_active_zones >= ns->nr_open_zones);
}
assert(ns->nr_active_zones >= 0);
}
int nvme_ns_setup(NvmeNamespace *ns, Error **errp);
void nvme_ns_drain(NvmeNamespace *ns);
void nvme_ns_shutdown(NvmeNamespace *ns);
void nvme_ns_cleanup(NvmeNamespace *ns);
#endif /* NVME_NS_H */
|
