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authorDan Williams <dan.j.williams@intel.com>2015-05-31 15:02:11 -0400
committerDan Williams <dan.j.williams@intel.com>2015-06-24 21:24:10 -0400
commit3d88002e4a7bd40f355550284c6cd140e6fe29dc (patch)
tree5934604ed6e21153ada873c7042c4037ef20ecdc /drivers/nvdimm/nd.h
parent1f7df6f88b9245a7f2d0f8ecbc97dc88c8d0d8e1 (diff)
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libnvdimm: support for legacy (non-aliasing) nvdimms
The libnvdimm region driver is an intermediary driver that translates non-volatile "region"s into "namespace" sub-devices that are surfaced by persistent memory block-device drivers (PMEM and BLK). ACPI 6 introduces the concept that a given nvdimm may simultaneously offer multiple access modes to its media through direct PMEM load/store access, or windowed BLK mode. Existing nvdimms mostly implement a PMEM interface, some offer a BLK-like mode, but never both as ACPI 6 defines. If an nvdimm is single interfaced, then there is no need for dimm metadata labels. For these devices we can take the region boundaries directly to create a child namespace device (nd_namespace_io). Acked-by: Christoph Hellwig <hch@lst.de> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/nd.h')
-rw-r--r--drivers/nvdimm/nd.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index ea0cca3..bc5a08e 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -23,6 +23,11 @@ struct nvdimm_drvdata {
void *data;
};
+struct nd_region_namespaces {
+ int count;
+ int active;
+};
+
struct nd_region {
struct device dev;
u16 ndr_mappings;
@@ -41,7 +46,15 @@ enum nd_async_mode {
void nd_device_register(struct device *dev);
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
int __init nvdimm_init(void);
+int __init nd_region_init(void);
void nvdimm_exit(void);
+void nd_region_exit(void);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
+struct nd_region *to_nd_region(struct device *dev);
+int nd_region_to_nstype(struct nd_region *nd_region);
+int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
+void nvdimm_bus_lock(struct device *dev);
+void nvdimm_bus_unlock(struct device *dev);
+bool is_nvdimm_bus_locked(struct device *dev);
#endif /* __ND_H__ */
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