qemu/hw/mem/nvdimm.c
Shivaprasad G Bhat 6c5627bb24 nvdimm: add uuid property to nvdimm
For ppc64, PAPR requires the nvdimm device to have UUID property
set in the device tree. Add an option to get it from the user.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <158131056931.2897.14057087440721445976.stgit@lep8c.aus.stglabs.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-02-21 09:15:04 +11:00

267 lines
7.9 KiB
C

/*
* Non-Volatile Dual In-line Memory Module Virtualization Implementation
*
* Copyright(C) 2015 Intel Corporation.
*
* Author:
* Xiao Guangrong <guangrong.xiao@linux.intel.com>
*
* Currently, it only supports PMEM Virtualization.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "qemu/pmem.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "hw/mem/nvdimm.h"
#include "hw/qdev-properties.h"
#include "hw/mem/memory-device.h"
#include "sysemu/hostmem.h"
static void nvdimm_get_label_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(obj);
uint64_t value = nvdimm->label_size;
visit_type_size(v, name, &value, errp);
}
static void nvdimm_set_label_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(obj);
Error *local_err = NULL;
uint64_t value;
if (nvdimm->nvdimm_mr) {
error_setg(&local_err, "cannot change property value");
goto out;
}
visit_type_size(v, name, &value, &local_err);
if (local_err) {
goto out;
}
if (value < MIN_NAMESPACE_LABEL_SIZE) {
error_setg(&local_err, "Property '%s.%s' (0x%" PRIx64 ") is required"
" at least 0x%lx", object_get_typename(obj),
name, value, MIN_NAMESPACE_LABEL_SIZE);
goto out;
}
nvdimm->label_size = value;
out:
error_propagate(errp, local_err);
}
static void nvdimm_get_uuid(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(obj);
char *value = NULL;
value = qemu_uuid_unparse_strdup(&nvdimm->uuid);
visit_type_str(v, name, &value, errp);
g_free(value);
}
static void nvdimm_set_uuid(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(obj);
Error *local_err = NULL;
char *value;
visit_type_str(v, name, &value, &local_err);
if (local_err) {
goto out;
}
if (qemu_uuid_parse(value, &nvdimm->uuid) != 0) {
error_setg(errp, "Property '%s.%s' has invalid value",
object_get_typename(obj), name);
goto out;
}
g_free(value);
out:
error_propagate(errp, local_err);
}
static void nvdimm_init(Object *obj)
{
object_property_add(obj, NVDIMM_LABEL_SIZE_PROP, "int",
nvdimm_get_label_size, nvdimm_set_label_size, NULL,
NULL, NULL);
object_property_add(obj, NVDIMM_UUID_PROP, "QemuUUID", nvdimm_get_uuid,
nvdimm_set_uuid, NULL, NULL, NULL);
}
static void nvdimm_finalize(Object *obj)
{
NVDIMMDevice *nvdimm = NVDIMM(obj);
g_free(nvdimm->nvdimm_mr);
}
static void nvdimm_prepare_memory_region(NVDIMMDevice *nvdimm, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(nvdimm);
uint64_t align, pmem_size, size;
MemoryRegion *mr;
g_assert(!nvdimm->nvdimm_mr);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
return;
}
mr = host_memory_backend_get_memory(dimm->hostmem);
align = memory_region_get_alignment(mr);
size = memory_region_size(mr);
pmem_size = size - nvdimm->label_size;
nvdimm->label_data = memory_region_get_ram_ptr(mr) + pmem_size;
pmem_size = QEMU_ALIGN_DOWN(pmem_size, align);
if (size <= nvdimm->label_size || !pmem_size) {
HostMemoryBackend *hostmem = dimm->hostmem;
char *path = object_get_canonical_path_component(OBJECT(hostmem));
error_setg(errp, "the size of memdev %s (0x%" PRIx64 ") is too "
"small to contain nvdimm label (0x%" PRIx64 ") and "
"aligned PMEM (0x%" PRIx64 ")",
path, memory_region_size(mr), nvdimm->label_size, align);
g_free(path);
return;
}
nvdimm->nvdimm_mr = g_new(MemoryRegion, 1);
memory_region_init_alias(nvdimm->nvdimm_mr, OBJECT(dimm),
"nvdimm-memory", mr, 0, pmem_size);
memory_region_set_nonvolatile(nvdimm->nvdimm_mr, true);
nvdimm->nvdimm_mr->align = align;
}
static MemoryRegion *nvdimm_md_get_memory_region(MemoryDeviceState *md,
Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(md);
Error *local_err = NULL;
if (!nvdimm->nvdimm_mr) {
nvdimm_prepare_memory_region(nvdimm, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return NULL;
}
}
return nvdimm->nvdimm_mr;
}
static void nvdimm_realize(PCDIMMDevice *dimm, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(dimm);
if (!nvdimm->nvdimm_mr) {
nvdimm_prepare_memory_region(nvdimm, errp);
}
}
/*
* the caller should check the input parameters before calling
* label read/write functions.
*/
static void nvdimm_validate_rw_label_data(NVDIMMDevice *nvdimm, uint64_t size,
uint64_t offset)
{
assert((nvdimm->label_size >= size + offset) && (offset + size > offset));
}
static void nvdimm_read_label_data(NVDIMMDevice *nvdimm, void *buf,
uint64_t size, uint64_t offset)
{
nvdimm_validate_rw_label_data(nvdimm, size, offset);
memcpy(buf, nvdimm->label_data + offset, size);
}
static void nvdimm_write_label_data(NVDIMMDevice *nvdimm, const void *buf,
uint64_t size, uint64_t offset)
{
MemoryRegion *mr;
PCDIMMDevice *dimm = PC_DIMM(nvdimm);
bool is_pmem = object_property_get_bool(OBJECT(dimm->hostmem),
"pmem", NULL);
uint64_t backend_offset;
nvdimm_validate_rw_label_data(nvdimm, size, offset);
if (!is_pmem) {
memcpy(nvdimm->label_data + offset, buf, size);
} else {
pmem_memcpy_persist(nvdimm->label_data + offset, buf, size);
}
mr = host_memory_backend_get_memory(dimm->hostmem);
backend_offset = memory_region_size(mr) - nvdimm->label_size + offset;
memory_region_set_dirty(mr, backend_offset, size);
}
static Property nvdimm_properties[] = {
DEFINE_PROP_BOOL(NVDIMM_UNARMED_PROP, NVDIMMDevice, unarmed, false),
DEFINE_PROP_END_OF_LIST(),
};
static void nvdimm_class_init(ObjectClass *oc, void *data)
{
PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
NVDIMMClass *nvc = NVDIMM_CLASS(oc);
DeviceClass *dc = DEVICE_CLASS(oc);
ddc->realize = nvdimm_realize;
mdc->get_memory_region = nvdimm_md_get_memory_region;
device_class_set_props(dc, nvdimm_properties);
nvc->read_label_data = nvdimm_read_label_data;
nvc->write_label_data = nvdimm_write_label_data;
}
static TypeInfo nvdimm_info = {
.name = TYPE_NVDIMM,
.parent = TYPE_PC_DIMM,
.class_size = sizeof(NVDIMMClass),
.class_init = nvdimm_class_init,
.instance_size = sizeof(NVDIMMDevice),
.instance_init = nvdimm_init,
.instance_finalize = nvdimm_finalize,
};
static void nvdimm_register_types(void)
{
type_register_static(&nvdimm_info);
}
type_init(nvdimm_register_types)