diff options
Diffstat (limited to 'drivers/acpi/nfit.c')
| -rw-r--r-- | drivers/acpi/nfit.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index c067d7414007..d0f35e63640b 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -1658,6 +1658,48 @@ static int ars_status_process_records(struct nvdimm_bus *nvdimm_bus, return 0; } +static void acpi_nfit_remove_resource(void *data) +{ + struct resource *res = data; + + remove_resource(res); +} + +static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc, + struct nd_region_desc *ndr_desc) +{ + struct resource *res, *nd_res = ndr_desc->res; + int is_pmem, ret; + + /* No operation if the region is already registered as PMEM */ + is_pmem = region_intersects(nd_res->start, resource_size(nd_res), + IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY); + if (is_pmem == REGION_INTERSECTS) + return 0; + + res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL); + if (!res) + return -ENOMEM; + + res->name = "Persistent Memory"; + res->start = nd_res->start; + res->end = nd_res->end; + res->flags = IORESOURCE_MEM; + res->desc = IORES_DESC_PERSISTENT_MEMORY; + + ret = insert_resource(&iomem_resource, res); + if (ret) + return ret; + + ret = devm_add_action(acpi_desc->dev, acpi_nfit_remove_resource, res); + if (ret) { + remove_resource(res); + return ret; + } + + return 0; +} + static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc, struct nd_mapping *nd_mapping, struct nd_region_desc *ndr_desc, struct acpi_nfit_memory_map *memdev, @@ -1773,6 +1815,14 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, nvdimm_bus = acpi_desc->nvdimm_bus; if (nfit_spa_type(spa) == NFIT_SPA_PM) { + rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc); + if (rc) { + dev_warn(acpi_desc->dev, + "failed to insert pmem resource to iomem: %d\n", + rc); + goto out; + } + nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus, ndr_desc); if (!nfit_spa->nd_region) |