Commit faec6f8a authored by Dan Williams's avatar Dan Williams
Browse files

libnvdimm, label: populate the type_guid property for v1.2 namespaces



The type_guid refers to the "Address Range Type GUID" for the region
backing a namespace as defined the ACPI NFIT (NVDIMM Firmware Interface
Table). This 'type' identifier specifies an access mechanism for the
given namespace. This capability replaces the confusing usage of the
'NSLABEL_FLAG_LOCAL' flag to indicate a block-aperture-mode namespace.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent f979b13c
......@@ -1743,15 +1743,17 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
struct nfit_set_info2 *info2;
struct nfit_set_info *info;
nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
if (!nd_set)
return -ENOMEM;
ndr_desc->nd_set = nd_set;
guid_copy(&nd_set->type_guid, (guid_t *) spa->range_guid);
if (spa_type == NFIT_SPA_PM || spa_type == NFIT_SPA_VOLATILE)
/* pass */;
else
return 0;
nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
if (!nd_set)
return -ENOMEM;
info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
if (!info)
return -ENOMEM;
......@@ -2228,7 +2230,7 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
struct acpi_nfit_system_address *spa = nfit_spa->spa;
struct nd_blk_region_desc *ndbr_desc;
struct nfit_mem *nfit_mem;
int blk_valid = 0;
int blk_valid = 0, rc;
if (!nvdimm) {
dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
......@@ -2260,6 +2262,9 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
ndbr_desc = to_blk_region_desc(ndr_desc);
ndbr_desc->enable = acpi_nfit_blk_region_enable;
ndbr_desc->do_io = acpi_desc->blk_do_io;
rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
if (rc)
return rc;
nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
ndr_desc);
if (!nfit_spa->nd_region)
......
......@@ -553,6 +553,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
int pos)
{
struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_ent *label_ent, *victim = NULL;
struct nd_namespace_label *nd_label;
......@@ -597,6 +598,8 @@ static int __pmem_label_update(struct nd_region *nd_region,
nd_label->rawsize = __cpu_to_le64(resource_size(res));
nd_label->dpa = __cpu_to_le64(res->start);
nd_label->slot = __cpu_to_le32(slot);
if (namespace_label_has(ndd, type_guid))
guid_copy(&nd_label->type_guid, &nd_set->type_guid);
nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__);
/* update label */
......@@ -684,6 +687,7 @@ static int __blk_label_update(struct nd_region *nd_region,
int num_labels)
{
int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO;
struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_label *nd_label;
struct nd_label_ent *label_ent, *e;
......@@ -788,6 +792,8 @@ static int __blk_label_update(struct nd_region *nd_region,
nd_label->rawsize = __cpu_to_le64(resource_size(res));
nd_label->lbasize = __cpu_to_le64(nsblk->lbasize);
nd_label->slot = __cpu_to_le32(slot);
if (namespace_label_has(ndd, type_guid))
guid_copy(&nd_label->type_guid, &nd_set->type_guid);
/* update label */
offset = nd_label_offset(ndd, nd_label);
......
......@@ -1639,6 +1639,8 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_label_ent *label_ent;
bool found_uuid = false;
......@@ -1659,8 +1661,17 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
continue;
if (namespace_label_has(ndd, type_guid)
&& !guid_equal(&nd_set->type_guid,
&nd_label->type_guid)) {
dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
nd_set->type_guid.b,
nd_label->type_guid.b);
continue;
}
if (found_uuid) {
dev_dbg(to_ndd(nd_mapping)->dev,
dev_dbg(ndd->dev,
"%s duplicate entry for uuid\n",
__func__);
return false;
......@@ -2047,12 +2058,21 @@ struct device *create_namespace_blk(struct nd_region *nd_region,
{
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
struct nd_interleave_set *nd_set = nd_region->nd_set;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_blk *nsblk;
char name[NSLABEL_NAME_LEN];
struct device *dev = NULL;
struct resource *res;
if (namespace_label_has(ndd, type_guid)
&& !guid_equal(&nd_set->type_guid,
&nd_label->type_guid)) {
dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
nd_set->type_guid.b, nd_label->type_guid.b);
return ERR_PTR(-EAGAIN);
}
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
if (!nsblk)
return ERR_PTR(-ENOMEM);
......@@ -2144,31 +2164,30 @@ static struct device **scan_labels(struct nd_region *nd_region)
kfree(devs);
devs = __devs;
if (is_nd_blk(&nd_region->dev)) {
if (is_nd_blk(&nd_region->dev))
dev = create_namespace_blk(nd_region, nd_label, count);
if (IS_ERR(dev))
goto err;
devs[count++] = dev;
} else {
else {
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_index *nsindex;
nsindex = to_namespace_index(ndd, ndd->ns_current);
dev = create_namespace_pmem(nd_region, nsindex, nd_label);
if (IS_ERR(dev)) {
switch (PTR_ERR(dev)) {
case -EAGAIN:
/* skip invalid labels */
continue;
case -ENODEV:
/* fallthrough to seed creation */
break;
default:
goto err;
}
} else
devs[count++] = dev;
}
if (IS_ERR(dev)) {
switch (PTR_ERR(dev)) {
case -EAGAIN:
/* skip invalid labels */
continue;
case -ENODEV:
/* fallthrough to seed creation */
break;
default:
goto err;
}
} else
devs[count++] = dev;
}
dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n",
......
......@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/sizes.h>
#include <linux/types.h>
#include <linux/uuid.h>
enum {
/* when a dimm supports both PMEM and BLK access a label is required */
......@@ -77,6 +78,8 @@ struct nd_interleave_set {
u64 cookie2;
/* compatibility with initial buggy Linux implementation */
u64 altcookie;
guid_t type_guid;
};
struct nd_mapping_desc {
......
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