acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle (23222f8f) · Commits · 戴 / test

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>

drivers/acpi/nfit/core.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -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.

include/acpi/nfit.h

0 → 100644

+18 −0

Original line number	Diff line number	Diff line
		/*
		* 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 */

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