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| author | Dan Williams <dan.j.williams@intel.com> | 2017-06-04 10:18:39 +0900 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-15 14:31:40 -0700 |
| commit | b3fde74ea195d2f9f49830a29f971a0aab4cd67a (patch) | |
| tree | 57919bab5e02417c880eb7887bb6672c5ac07d3d /drivers/nvdimm/pfn_devs.c | |
| parent | 355d838878e1baec494c228458238d078dc3ca51 (diff) | |
| download | linux-b3fde74ea195d2f9f49830a29f971a0aab4cd67a.tar.gz | |
libnvdimm, label: add address abstraction identifiers
Starting with v1.2 labels, 'address abstractions' can be hinted via an address abstraction id that implies an info-block format. The standard address abstraction in the specification is the v2 format of the Block-Translation-Table (BTT). Support for that is saved for a later patch, for now we add support for the Linux supported address abstractions BTT (v1), PFN, and DAX. The new 'holder_class' attribute for namespace devices is added for tooling to specify the 'abstraction_guid' to store in the namespace label. For v1.1 labels this field is undefined and any setting of 'holder_class' away from the default 'none' value will only have effect until the driver is unloaded. Setting 'holder_class' requires that whatever device tries to claim the namespace must be of the specified class. Cc: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
| -rw-r--r-- | drivers/nvdimm/pfn_devs.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c index a6c403600d19..5e4041276d6f 100644 --- a/drivers/nvdimm/pfn_devs.c +++ b/drivers/nvdimm/pfn_devs.c @@ -471,6 +471,14 @@ int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns) if (ndns->force_raw) return -ENODEV; + switch (ndns->claim_class) { + case NVDIMM_CCLASS_NONE: + case NVDIMM_CCLASS_PFN: + break; + default: + return -ENODEV; + } + nvdimm_bus_lock(&ndns->dev); nd_pfn = nd_pfn_alloc(nd_region); pfn_dev = nd_pfn_devinit(nd_pfn, ndns); |