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libnvdimm, btt: BTT updates for UEFI 2.7 format

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The UEFI 2.7 specification defines an updated BTT metadata format,
bumping the revision to 2.0. Add support for the new format, while
retaining compatibility for the old 1.1 format.

Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Linda Knippers <linda.knippers@hpe.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Esse commit está contido em:
Vishal Verma
2017-06-28 14:25:00 -06:00
commit de Dan Williams
pai 5e93746f06
commit 14e4945426
9 arquivos alterados com 134 adições e 15 exclusões
Baixar arquivo de patch Baixar arquivo de diferenças Expandir todos os arquivos Colapsar todos os arquivos

46
drivers/nvdimm/btt_devs.c
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@@ -260,20 +260,55 @@ bool nd_btt_arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super)
}
EXPORT_SYMBOL(nd_btt_arena_is_valid);
int nd_btt_version(struct nd_btt *nd_btt, struct nd_namespace_common *ndns,
struct btt_sb *btt_sb)
{
if (ndns->claim_class == NVDIMM_CCLASS_BTT2) {
/* Probe/setup for BTT v2.0 */
nd_btt->initial_offset = 0;
nd_btt->version_major = 2;
nd_btt->version_minor = 0;
if (nvdimm_read_bytes(ndns, 0, btt_sb, sizeof(*btt_sb), 0))
return -ENXIO;
if (!nd_btt_arena_is_valid(nd_btt, btt_sb))
return -ENODEV;
if ((le16_to_cpu(btt_sb->version_major) != 2) ||
(le16_to_cpu(btt_sb->version_minor) != 0))
return -ENODEV;
} else {
/*
* Probe/setup for BTT v1.1 (NVDIMM_CCLASS_NONE or
* NVDIMM_CCLASS_BTT)
*/
nd_btt->initial_offset = SZ_4K;
nd_btt->version_major = 1;
nd_btt->version_minor = 1;
if (nvdimm_read_bytes(ndns, SZ_4K, btt_sb, sizeof(*btt_sb), 0))
return -ENXIO;
if (!nd_btt_arena_is_valid(nd_btt, btt_sb))
return -ENODEV;
if ((le16_to_cpu(btt_sb->version_major) != 1) ||
(le16_to_cpu(btt_sb->version_minor) != 1))
return -ENODEV;
}
return 0;
}
EXPORT_SYMBOL(nd_btt_version);
static int __nd_btt_probe(struct nd_btt *nd_btt,
struct nd_namespace_common *ndns, struct btt_sb *btt_sb)
{
int rc;
if (!btt_sb || !ndns || !nd_btt)
return -ENODEV;
if (nvdimm_read_bytes(ndns, SZ_4K, btt_sb, sizeof(*btt_sb), 0))
return -ENXIO;
if (nvdimm_namespace_capacity(ndns) < SZ_16M)
return -ENXIO;
if (!nd_btt_arena_is_valid(nd_btt, btt_sb))
return -ENODEV;
rc = nd_btt_version(nd_btt, ndns, btt_sb);
if (rc < 0)
return rc;
nd_btt->lbasize = le32_to_cpu(btt_sb->external_lbasize);
nd_btt->uuid = kmemdup(btt_sb->uuid, 16, GFP_KERNEL);
@@ -298,6 +333,7 @@ int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns)
switch (ndns->claim_class) {
case NVDIMM_CCLASS_NONE:
case NVDIMM_CCLASS_BTT:
case NVDIMM_CCLASS_BTT2:
break;
default:
return -ENODEV;