diff options
Diffstat (limited to 'drivers/nvdimm/nd.h')
| -rw-r--r-- | drivers/nvdimm/nd.h | 22 |
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__ */ |