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authorDan Williams <dan.j.williams@intel.com>2015-05-31 22:02:11 +0300
committerDan Williams <dan.j.williams@intel.com>2015-06-25 04:24:10 +0300
commit3d88002e4a7bd40f355550284c6cd140e6fe29dc (patch)
tree5934604ed6e21153ada873c7042c4037ef20ecdc /include/linux/libnvdimm.h
parent1f7df6f88b9245a7f2d0f8ecbc97dc88c8d0d8e1 (diff)
downloadlinux-3d88002e4a7bd40f355550284c6cd140e6fe29dc.tar.xz
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.h7
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);