diff options
| -rw-r--r-- | drivers/acpi/nfit/core.c | 27 | ||||
| -rw-r--r-- | include/acpi/nfit.h | 18 |
2 files changed, 45 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index bbe48ad20886..4d6eeb1793e6 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -23,6 +23,7 @@ #include <linux/io.h> #include <linux/nd.h> #include <asm/cacheflush.h> +#include <acpi/nfit.h> #include "nfit.h" /* @@ -690,6 +691,32 @@ static bool add_memdev(struct acpi_nfit_desc *acpi_desc, return true; } +int nfit_get_smbios_id(u32 device_handle, u16 *flags) +{ + struct acpi_nfit_memory_map *memdev; + struct acpi_nfit_desc *acpi_desc; + struct nfit_mem *nfit_mem; + + mutex_lock(&acpi_desc_lock); + list_for_each_entry(acpi_desc, &acpi_descs, list) { + mutex_lock(&acpi_desc->init_mutex); + list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) { + memdev = __to_nfit_memdev(nfit_mem); + if (memdev->device_handle == device_handle) { + mutex_unlock(&acpi_desc->init_mutex); + mutex_unlock(&acpi_desc_lock); + *flags = memdev->flags; + return memdev->physical_id; + } + } + mutex_unlock(&acpi_desc->init_mutex); + } + mutex_unlock(&acpi_desc_lock); + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(nfit_get_smbios_id); + /* * An implementation may provide a truncated control region if no block windows * are defined. diff --git a/include/acpi/nfit.h b/include/acpi/nfit.h new file mode 100644 index 000000000000..86ed07c1200d --- /dev/null +++ b/include/acpi/nfit.h @@ -0,0 +1,18 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * Copyright (C) 2018 Intel Corporation + */ + +#ifndef __ACPI_NFIT_H +#define __ACPI_NFIT_H + +#if IS_ENABLED(CONFIG_ACPI_NFIT) +int nfit_get_smbios_id(u32 device_handle, u16 *flags); +#else +static inline int nfit_get_smbios_id(u32 device_handle, u16 *flags) +{ + return -EOPNOTSUPP; +} +#endif + +#endif /* __ACPI_NFIT_H */ |