summaryrefslogtreecommitdiff
path: root/drivers/acpi/nfit
diff options
context:
space:
mode:
authorTony Luck <tony.luck@intel.com>2018-03-12 21:24:28 +0300
committerBorislav Petkov <bp@suse.de>2018-03-14 14:43:50 +0300
commit23222f8f8dce6a6d014bc5b7107a83ebe2a9c022 (patch)
treed44949bbc2b3ccb51cb2cf2c815019063255c061 /drivers/acpi/nfit
parent001f86137d3fca3c9002beaa7609c666715ebc70 (diff)
downloadlinux-23222f8f8dce6a6d014bc5b7107a83ebe2a9c022.tar.xz
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>
Diffstat (limited to 'drivers/acpi/nfit')
-rw-r--r--drivers/acpi/nfit/core.c27
1 files changed, 27 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.