diff options
| author | Ben Widawsky <bwidawsk@kernel.org> | 2021-05-27 23:30:41 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-07-25 22:18:06 +0300 |
| commit | dd5ba0ebbdc414f4dda4dc4ec076f46fb6f26ffd (patch) | |
| tree | b7ef6ad525ee44eadd80f382ab5adbace28b8837 /drivers/cxl/cxl.h | |
| parent | 779dd20cfb56c510f89877cca45529fa9f8bc450 (diff) | |
| download | linux-dd5ba0ebbdc414f4dda4dc4ec076f46fb6f26ffd.tar.xz | |
cxl/region: Add a 'uuid' attribute
The process of provisioning a region involves triggering the creation of
a new region object, pouring in the configuration, and then binding that
configured object to the region driver to start its operation. For
persistent memory regions the CXL specification mandates that it
identified by a uuid. Add an ABI for userspace to specify a region's
uuid.
Signed-off-by: Ben Widawsky <bwidawsk@kernel.org>
[djbw: simplify locking]
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/165784334465.1758207.8224025435884752570.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 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 0b38ee99bddf..ea7255020808 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -295,18 +295,43 @@ struct cxl_root_decoder { struct cxl_switch_decoder cxlsd; }; +/* + * enum cxl_config_state - State machine for region configuration + * @CXL_CONFIG_IDLE: Any sysfs attribute can be written freely + * @CXL_CONFIG_ACTIVE: All targets have been added the region is now + * active + */ +enum cxl_config_state { + CXL_CONFIG_IDLE, + CXL_CONFIG_ACTIVE, +}; + +/** + * struct cxl_region_params - region settings + * @state: allow the driver to lockdown further parameter changes + * @uuid: unique id for persistent regions + * + * State transitions are protected by the cxl_region_rwsem + */ +struct cxl_region_params { + enum cxl_config_state state; + uuid_t uuid; +}; + /** * struct cxl_region - CXL region * @dev: This region's device * @id: This region's id. Id is globally unique across all regions * @mode: Endpoint decoder allocation / access mode * @type: Endpoint decoder target type + * @params: active + config params for the region */ struct cxl_region { struct device dev; int id; enum cxl_decoder_mode mode; enum cxl_decoder_type type; + struct cxl_region_params params; }; /** |