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path: root/drivers/nvdimm/pfn_devs.c
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Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
-rw-r--r--drivers/nvdimm/pfn_devs.c47
1 files changed, 30 insertions, 17 deletions
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 65cc171c721d..f5c4e8c6e29d 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -364,9 +364,9 @@ struct device *nd_pfn_create(struct nd_region *nd_region)
int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
{
u64 checksum, offset;
- unsigned long align;
enum nd_pfn_mode mode;
struct nd_namespace_io *nsio;
+ unsigned long align, start_pad;
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
struct nd_namespace_common *ndns = nd_pfn->ndns;
const u8 *parent_uuid = nd_dev_to_uuid(&ndns->dev);
@@ -410,6 +410,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
align = le32_to_cpu(pfn_sb->align);
offset = le64_to_cpu(pfn_sb->dataoff);
+ start_pad = le32_to_cpu(pfn_sb->start_pad);
if (align == 0)
align = 1UL << ilog2(offset);
mode = le32_to_cpu(pfn_sb->mode);
@@ -468,7 +469,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
return -EBUSY;
}
- if ((align && !IS_ALIGNED(offset, align))
+ if ((align && !IS_ALIGNED(nsio->res.start + offset + start_pad, align))
|| !IS_ALIGNED(offset, PAGE_SIZE)) {
dev_err(&nd_pfn->dev,
"bad offset: %#llx dax disabled align: %#lx\n",
@@ -541,9 +542,10 @@ static unsigned long init_altmap_reserve(resource_size_t base)
return reserve;
}
-static struct vmem_altmap *__nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
- struct resource *res, struct vmem_altmap *altmap)
+static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
{
+ struct resource *res = &pgmap->res;
+ struct vmem_altmap *altmap = &pgmap->altmap;
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
u64 offset = le64_to_cpu(pfn_sb->dataoff);
u32 start_pad = __le32_to_cpu(pfn_sb->start_pad);
@@ -560,11 +562,13 @@ static struct vmem_altmap *__nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
res->start += start_pad;
res->end -= end_trunc;
+ pgmap->type = MEMORY_DEVICE_HOST;
+
if (nd_pfn->mode == PFN_MODE_RAM) {
if (offset < SZ_8K)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
nd_pfn->npfns = le64_to_cpu(pfn_sb->npfns);
- altmap = NULL;
+ pgmap->altmap_valid = false;
} else if (nd_pfn->mode == PFN_MODE_PMEM) {
nd_pfn->npfns = PFN_SECTION_ALIGN_UP((resource_size(res)
- offset) / PAGE_SIZE);
@@ -576,10 +580,17 @@ static struct vmem_altmap *__nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
memcpy(altmap, &__altmap, sizeof(*altmap));
altmap->free = PHYS_PFN(offset - SZ_8K);
altmap->alloc = 0;
+ pgmap->altmap_valid = true;
} else
- return ERR_PTR(-ENXIO);
+ return -ENXIO;
+
+ return 0;
+}
- return altmap;
+static u64 phys_pmem_align_down(struct nd_pfn *nd_pfn, u64 phys)
+{
+ return min_t(u64, PHYS_SECTION_ALIGN_DOWN(phys),
+ ALIGN_DOWN(phys, nd_pfn->align));
}
static int nd_pfn_init(struct nd_pfn *nd_pfn)
@@ -637,13 +648,16 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
start = nsio->res.start;
size = PHYS_SECTION_ALIGN_UP(start + size) - start;
if (region_intersects(start, size, IORESOURCE_SYSTEM_RAM,
- IORES_DESC_NONE) == REGION_MIXED) {
+ IORES_DESC_NONE) == REGION_MIXED
+ || !IS_ALIGNED(start + resource_size(&nsio->res),
+ nd_pfn->align)) {
size = resource_size(&nsio->res);
- end_trunc = start + size - PHYS_SECTION_ALIGN_DOWN(start + size);
+ end_trunc = start + size - phys_pmem_align_down(nd_pfn,
+ start + size);
}
if (start_pad + end_trunc)
- dev_info(&nd_pfn->dev, "%s section collision, truncate %d bytes\n",
+ dev_info(&nd_pfn->dev, "%s alignment collision, truncate %d bytes\n",
dev_name(&ndns->dev), start_pad + end_trunc);
/*
@@ -698,19 +712,18 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
* Determine the effective resource range and vmem_altmap from an nd_pfn
* instance.
*/
-struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
- struct resource *res, struct vmem_altmap *altmap)
+int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
{
int rc;
if (!nd_pfn->uuid || !nd_pfn->ndns)
- return ERR_PTR(-ENODEV);
+ return -ENODEV;
rc = nd_pfn_init(nd_pfn);
if (rc)
- return ERR_PTR(rc);
+ return rc;
- /* we need a valid pfn_sb before we can init a vmem_altmap */
- return __nvdimm_setup_pfn(nd_pfn, res, altmap);
+ /* we need a valid pfn_sb before we can init a dev_pagemap */
+ return __nvdimm_setup_pfn(nd_pfn, pgmap);
}
EXPORT_SYMBOL_GPL(nvdimm_setup_pfn);
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