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

drivers/acpi/nfit/core.c

+10 −5
Original line number Diff line number Diff line
@@ -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)

drivers/nvdimm/label.c

+6 −0
Original line number Diff line number Diff line
@@ -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);

drivers/nvdimm/namespace_devs.c

+38 −19
Original line number Diff line number Diff line
@@ -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);
@@ -2144,17 +2164,16 @@ 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:
@@ -2168,7 +2187,7 @@ static struct device **scan_labels(struct nd_region *nd_region) 
			}

		} else

			devs[count++] = dev;

		}



	}



	dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n",

include/linux/libnvdimm.h

+3 −0
Original line number Diff line number Diff line
@@ -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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