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* Add NVDIMM support to EDAC (Tony Luck)

Browse source 
* misc fixes
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Merge tag 'edac_for_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull EDAC updates from Borislav Petkov:
 "Noteworthy is the NVDIMM support:

   - NVDIMM support to EDAC (Tony Luck)

   - misc fixes"

* tag 'edac_for_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC, sb_edac: Remove variable length array usage
  EDAC, skx_edac: Detect non-volatile DIMMs
  firmware, DMI: Add function to look up a handle and return DIMM size
  acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle
  EDAC: Add new memory type for non-volatile DIMMs
  EDAC: Drop duplicated array of strings for memory type names
  EDAC, layerscape: Allow building for LS1021A
This commit is contained in:
Linus Torvalds 2018-04-05 14:21:13 -07:00
commit dd972f924d
10 changed files with 175 additions and 59 deletions
Download patch file Download diff file Expand all files Collapse all files

31
drivers/firmware/dmi_scan.c
View file

@ -32,6 +32,7 @@ static char dmi_ids_string[128] __initdata;
static struct dmi_memdev_info {
const char *device;
const char *bank;
u64 size; /* bytes */
u16 handle;
} *dmi_memdev;
static int dmi_memdev_nr;
@ -386,6 +387,8 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v)
{
const char *d = (const char *)dm;
static int nr;
u64 bytes;
u16 size;
if (dm->type != DMI_ENTRY_MEM_DEVICE || dm->length < 0x12)
return;
@ -396,6 +399,20 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v)
dmi_memdev[nr].handle = get_unaligned(&dm->handle);
dmi_memdev[nr].device = dmi_string(dm, d[0x10]);
dmi_memdev[nr].bank = dmi_string(dm, d[0x11]);
size = get_unaligned((u16 *)&d[0xC]);
if (size == 0)
bytes = 0;
else if (size == 0xffff)
bytes = ~0ull;
else if (size & 0x8000)
bytes = (u64)(size & 0x7fff) << 10;
else if (size != 0x7fff)
bytes = (u64)size << 20;
else
bytes = (u64)get_unaligned((u32 *)&d[0x1C]) << 20;
dmi_memdev[nr].size = bytes;
nr++;
}
@ -1085,3 +1102,17 @@ void dmi_memdev_name(u16 handle, const char **bank, const char **device)
}
}
EXPORT_SYMBOL_GPL(dmi_memdev_name);
u64 dmi_memdev_size(u16 handle)
{
int n;
if (dmi_memdev) {
for (n = 0; n < dmi_memdev_nr; n++) {
if (handle == dmi_memdev[n].handle)
return dmi_memdev[n].size;
}
}
return ~0ull;
}
EXPORT_SYMBOL_GPL(dmi_memdev_size);