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| author | Dan Williams <dan.j.williams@intel.com> | 2022-04-25 20:43:44 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-07-25 21:18:06 +0200 |
| commit | 23a22cd1c98be518774fe7f7e8a5203af050525a (patch) | |
| tree | 023f45987cce6345b543ac60ecdb32654735a1db /drivers/cxl/cxl.h | |
| parent | cxl/region: Add interleave geometry attributes (diff) | |
| download | linux-23a22cd1c98be518774fe7f7e8a5203af050525a.tar.xz linux-23a22cd1c98be518774fe7f7e8a5203af050525a.zip | |
cxl/region: Allocate HPA capacity to regions
After a region's interleave parameters (ways and granularity) are set,
add a way for regions to allocate HPA (host physical address space) from
the free capacity in their parent root-decoder. The allocator for this
capacity reuses the 'struct resource' based allocator used for
CONFIG_DEVICE_PRIVATE.
Once the tuple of "ways, granularity, [uuid], and size" is set the
region configuration transitions to the CXL_CONFIG_INTERLEAVE_ACTIVE
state which is a precursor to allowing endpoint decoders to be added to
a region.
Co-developed-by: Ben Widawsky <bwidawsk@kernel.org>
Signed-off-by: Ben Widawsky <bwidawsk@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/165784335630.1758207.420216490941955417.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxl.h')
| -rw-r--r-- | drivers/cxl/cxl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index e36f7577978b..9518b57c19b6 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -341,6 +341,7 @@ enum cxl_config_state { * @uuid: unique id for persistent regions * @interleave_ways: number of endpoints in the region * @interleave_granularity: capacity each endpoint contributes to a stripe + * @res: allocated iomem capacity for this region * * State transitions are protected by the cxl_region_rwsem */ @@ -349,6 +350,7 @@ struct cxl_region_params { uuid_t uuid; int interleave_ways; int interleave_granularity; + struct resource *res; }; /** |