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Diffstat (limited to 'drivers/nvdimm/nd.h')
-rw-r--r--drivers/nvdimm/nd.h22
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index d13eccbb67e9..1b937c235913 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -20,6 +20,12 @@
#include "label.h"
enum {
+ /*
+ * Limits the maximum number of block apertures a dimm can
+ * support and is an input to the geometry/on-disk-format of a
+ * BTT instance
+ */
+ ND_MAX_LANES = 256,
SECTOR_SHIFT = 9,
};
@@ -75,6 +81,11 @@ static inline struct nd_namespace_index *to_next_namespace_index(
for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
res; res = next, next = next ? next->sibling : NULL)
+struct nd_percpu_lane {
+ int count;
+ spinlock_t lock;
+};
+
struct nd_region {
struct device dev;
struct ida ns_ida;
@@ -84,9 +95,10 @@ struct nd_region {
u16 ndr_mappings;
u64 ndr_size;
u64 ndr_start;
- int id;
+ int id, num_lanes;
void *provider_data;
struct nd_interleave_set *nd_set;
+ struct nd_percpu_lane __percpu *lane;
struct nd_mapping mapping[0];
};
@@ -100,9 +112,11 @@ static inline unsigned nd_inc_seq(unsigned seq)
return next[seq & 3];
}
+struct btt;
struct nd_btt {
struct device dev;
struct nd_namespace_common *ndns;
+ struct btt *btt;
unsigned long lbasize;
u8 *uuid;
int id;
@@ -157,6 +171,8 @@ static inline struct device *nd_btt_create(struct nd_region *nd_region)
#endif
struct nd_region *to_nd_region(struct device *dev);
+unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
+void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
int nd_region_to_nstype(struct nd_region *nd_region);
int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
@@ -172,4 +188,8 @@ struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
resource_size_t n);
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
+int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
+int nvdimm_namespace_detach_btt(struct nd_namespace_common *ndns);
+const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
+ char *name);
#endif /* __ND_H__ */