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acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle

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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>
This commit is contained in:
Tony Luck 2018-03-12 11:24:28 -07:00 committed by Borislav Petkov
parent 001f86137d
commit 23222f8f8d
2 changed files with 45 additions and 0 deletions
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27
drivers/acpi/nfit/core.c
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@ -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.

18
include/acpi/nfit.h Normal file
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@ -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 */