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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2015-07-10 11:06:14 -0600 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-07-10 14:43:50 -0400 |
| commit | f0f2c072cf530d5b8890be5051cc8b36b0c54cce (patch) | |
| tree | 3f57708f1babe641e193e06dbb433fd5bb8fea0e /drivers/acpi/nfit.h | |
| parent | c2ad29540cb913bd9e526fae77c35c7fb45f24a3 (diff) | |
| download | blackbird-op-linux-f0f2c072cf530d5b8890be5051cc8b36b0c54cce.tar.gz blackbird-op-linux-f0f2c072cf530d5b8890be5051cc8b36b0c54cce.zip | |
nfit: add support for NVDIMM "latch" flag
Add support in the NFIT BLK I/O path for the "latch" flag
defined in the "Get Block NVDIMM Flags" _DSM function:
http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf
This flag requires the driver to read back the command register after it
is written in the block I/O path. This ensures that the hardware has
fully processed the new command and moved the aperture appropriately.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit.h')
| -rw-r--r-- | drivers/acpi/nfit.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h index 815cb561cdba..79b6d83875c1 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit.h @@ -40,6 +40,10 @@ enum nfit_uuids { NFIT_UUID_MAX, }; +enum { + ND_BLK_DCR_LATCH = 2, +}; + struct nfit_spa { struct acpi_nfit_system_address *spa; struct list_head list; @@ -131,6 +135,7 @@ struct nfit_blk { u64 stat_offset; u64 cmd_offset; void __iomem *nvdimm_flush; + u32 dimm_flags; }; enum spa_map_type { |
