diff options
| author | Tony Luck <tony.luck@intel.com> | 2018-03-12 11:24:28 -0700 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2018-03-14 12:43:50 +0100 |
| commit | 23222f8f8dce6a6d014bc5b7107a83ebe2a9c022 (patch) | |
| tree | d44949bbc2b3ccb51cb2cf2c815019063255c061 | |
| parent | 001f86137d3fca3c9002beaa7609c666715ebc70 (diff) | |
acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle
EDAC driver needs to look up attributes of NVDIMMs provided in SMBIOS.
Provide a function that looks up an acpi_nfit_memory_map from a device
handle (node/socket/mc/channel/dimm) and returns the SMBIOS handle.
Also pass back the "flags" so we can see if the NVDIMM is OK.
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Aristeu Rozanski <aris@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Erik Schmauss <erik.schmauss@intel.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Robert Moore <robert.moore@intel.com>
Cc: devel@acpica.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-nvdimm@lists.01.org
Link: http://lkml.kernel.org/r/20180312182430.10335-4-tony.luck@intel.com
Signed-off-by: Borislav Petkov <bp@suse.de>
| -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 */ |