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| author | Dan Williams | 2015-05-31 21:02:11 +0200 |
|---|---|---|
| committer | Dan Williams | 2015-06-25 03:24:10 +0200 |
| commit | 3d88002e4a7bd40f355550284c6cd140e6fe29dc (patch) | |
| tree | 5934604ed6e21153ada873c7042c4037ef20ecdc /include/linux/libnvdimm.h | |
| parent | libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory) (diff) | |
| download | kernel-qcow2-linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.tar.gz kernel-qcow2-linux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.tar.xz kernel-qcow2-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 'include/linux/libnvdimm.h')
| -rw-r--r-- | include/linux/libnvdimm.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 39e7e606092a..37f966aff386 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -71,8 +71,11 @@ struct nd_region_desc { struct nvdimm_bus; struct device; -struct nvdimm_bus *nvdimm_bus_register(struct device *parent, - struct nvdimm_bus_descriptor *nfit_desc); +struct module; +struct nvdimm_bus *__nvdimm_bus_register(struct device *parent, + struct nvdimm_bus_descriptor *nfit_desc, struct module *module); +#define nvdimm_bus_register(parent, desc) \ + __nvdimm_bus_register(parent, desc, THIS_MODULE) void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus); struct nvdimm_bus *to_nvdimm_bus(struct device *dev); struct nvdimm *to_nvdimm(struct device *dev); |