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| author | Dan Williams <dan.j.williams@intel.com> | 2015-05-31 21:02:11 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-25 03:24:10 +0200 |
| commit | 3d88002e4a7bd40f355550284c6cd140e6fe29dc (patch) | |
| tree | 5934604ed6e21153ada873c7042c4037ef20ecdc /drivers/nvdimm/nd-core.h | |
| parent | libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory) (diff) | |
| download | linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.tar.xz linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.zip | |
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-core.h')
| -rw-r--r-- | drivers/nvdimm/nd-core.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index 1d760bf24857..0e9b41fd2546 100644 --- a/drivers/nvdimm/nd-core.h +++ b/drivers/nvdimm/nd-core.h @@ -21,9 +21,11 @@ extern int nvdimm_major; struct nvdimm_bus { struct nvdimm_bus_descriptor *nd_desc; + struct module *module; struct list_head list; struct device dev; int id; + struct mutex reconfig_mutex; }; struct nvdimm { @@ -34,6 +36,9 @@ struct nvdimm { int id; }; +bool is_nvdimm(struct device *dev); +bool is_nd_blk(struct device *dev); +bool is_nd_pmem(struct device *dev); struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev); int __init nvdimm_bus_init(void); void nvdimm_bus_exit(void); @@ -43,5 +48,4 @@ void nd_synchronize(void); int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus); int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus); int nd_match_dimm(struct device *dev, void *data); -bool is_nvdimm(struct device *dev); #endif /* __ND_CORE_H__ */ |