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/*
* QEMU NVM Express Subsystem: nvme-subsys
*
* Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
*
* This code is licensed under the GNU GPL v2. Refer COPYING.
*/
#include "qemu/units.h"
#include "qemu/osdep.h"
#include "qemu/uuid.h"
#include "qemu/iov.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-core.h"
#include "hw/block/block.h"
#include "block/aio.h"
#include "block/accounting.h"
#include "sysemu/sysemu.h"
#include "hw/pci/pci.h"
#include "nvme.h"
#include "nvme-subsys.h"
int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
{
NvmeSubsystem *subsys = n->subsys;
int cntlid;
for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
if (!subsys->ctrls[cntlid]) {
break;
}
}
if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
error_setg(errp, "no more free controller id");
return -1;
}
subsys->ctrls[cntlid] = n;
return cntlid;
}
int nvme_subsys_register_ns(NvmeNamespace *ns, Error **errp)
{
NvmeSubsystem *subsys = ns->subsys;
NvmeCtrl *n;
int i;
if (subsys->namespaces[nvme_nsid(ns)]) {
error_setg(errp, "namespace %d already registerd to subsy %s",
nvme_nsid(ns), subsys->parent_obj.id);
return -1;
}
subsys->namespaces[nvme_nsid(ns)] = ns;
for (i = 0; i < ARRAY_SIZE(subsys->ctrls); i++) {
n = subsys->ctrls[i];
if (n && nvme_register_namespace(n, ns, errp)) {
return -1;
}
}
return 0;
}
static void nvme_subsys_setup(NvmeSubsystem *subsys)
{
const char *nqn = subsys->params.nqn ?
subsys->params.nqn : subsys->parent_obj.id;
snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn),
"nqn.2019-08.org.qemu:%s", nqn);
}
static void nvme_subsys_realize(DeviceState *dev, Error **errp)
{
NvmeSubsystem *subsys = NVME_SUBSYS(dev);
nvme_subsys_setup(subsys);
}
static Property nvme_subsystem_props[] = {
DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn),
DEFINE_PROP_END_OF_LIST(),
};
static void nvme_subsys_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
dc->realize = nvme_subsys_realize;
dc->desc = "Virtual NVMe subsystem";
device_class_set_props(dc, nvme_subsystem_props);
}
static const TypeInfo nvme_subsys_info = {
.name = TYPE_NVME_SUBSYS,
.parent = TYPE_DEVICE,
.class_init = nvme_subsys_class_init,
.instance_size = sizeof(NvmeSubsystem),
};
static void nvme_subsys_register_types(void)
{
type_register_static(&nvme_subsys_info);
}
type_init(nvme_subsys_register_types)
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