diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2016-03-11 10:15:36 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-05-09 15:35:42 -0700 |
| commit | cd03412a51ac4cb3001a8cdfae4560c9602f3387 (patch) | |
| tree | c2d501759d7d96fab9a0f70eefba139876bb12de /include/uapi/linux/ndctl.h | |
| parent | 0bfb8dd3edd6e423b5053c86e10c97e92cf205ea (diff) | |
libnvdimm, dax: introduce device-dax infrastructure
Device DAX is the device-centric analogue of Filesystem DAX
(CONFIG_FS_DAX). It allows persistent memory ranges to be allocated and
mapped without need of an intervening file system. This initial
infrastructure arranges for a libnvdimm pfn-device to be represented as
a different device-type so that it can be attached to a driver other
than the pmem driver.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/uapi/linux/ndctl.h')
| -rw-r--r-- | include/uapi/linux/ndctl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index 7cc28ab05b87..4f29d247f709 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -206,6 +206,7 @@ static inline const char *nvdimm_cmd_name(unsigned cmd) #define ND_DEVICE_NAMESPACE_IO 4 /* legacy persistent memory */ #define ND_DEVICE_NAMESPACE_PMEM 5 /* PMEM namespace (may alias with BLK) */ #define ND_DEVICE_NAMESPACE_BLK 6 /* BLK namespace (may alias with PMEM) */ +#define ND_DEVICE_DAX_PMEM 7 /* Device DAX interface to pmem */ enum nd_driver_flags { ND_DRIVER_DIMM = 1 << ND_DEVICE_DIMM, @@ -214,6 +215,7 @@ enum nd_driver_flags { ND_DRIVER_NAMESPACE_IO = 1 << ND_DEVICE_NAMESPACE_IO, ND_DRIVER_NAMESPACE_PMEM = 1 << ND_DEVICE_NAMESPACE_PMEM, ND_DRIVER_NAMESPACE_BLK = 1 << ND_DEVICE_NAMESPACE_BLK, + ND_DRIVER_DAX_PMEM = 1 << ND_DEVICE_DAX_PMEM, }; enum { |