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/*
* 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 {
uint32_t nsid;
QemuUUID uuid;
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;
} 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;
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;
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 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 enum NvmeZoneState nvme_get_zone_state(NvmeZone *zone)
{
return zone->d.zs >> 4;
}
static inline void nvme_set_zone_state(NvmeZone *zone, enum 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 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(NvmeCtrl *n, 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 */
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