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linux/include/cxl/cxl.h

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cxl: export internal structs for external Type2 drivers In preparation for type2 support, move structs and functions a type2 driver will need to access to into a new shared header file. Differentiate between public and private data to be preserved by type2 drivers. Signed-off-by: Alejandro Lucero <alucerop@amd.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Gregory Price <gourry@gourry.net> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20260306164741.3796372-3-alejandro.lucero-palau@amd.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-03-06 16:47:39 +00:00
cxl/region: Introduce devm_cxl_probe_mem() To date, platform firmware maps accelerator memory and accelerator drivers simply want an address range that they can map themselves. This typically results in a single region being auto-assembled upon registration of a memory device. Use the @attach mechanism of devm_cxl_add_memdev() parameter to retrieve that region while also adhering to CXL subsystem locking and lifetime rules. As part of adhering to current object lifetime rules, if the region or the CXL port topology is invalidated, the CXL core arranges for the accelertor driver to be detached as well. The locking and lifetime rules were validated with Dave's work-in-progress cxl-type-2 support for cxl_test. devm_cxl_add_classdev() supports the general memory expansion flow where region assembly is optional, dynamic, and user controlled. Cc: Alejandro Lucero <alucerop@amd.com> Signed-off-by: Dan Williams <djbw@kernel.org> Reviewed-by: Alejandro Lucero <alucerop@amd.com> Tested-by: Alejandro Lucero <alucerop@amd.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Link: https://patch.msgid.link/20260519210158.1499795-6-djbw@kernel.org Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-05-19 14:01:58 -07:00
cxl: export internal structs for external Type2 drivers In preparation for type2 support, move structs and functions a type2 driver will need to access to into a new shared header file. Differentiate between public and private data to be preserved by type2 drivers. Signed-off-by: Alejandro Lucero <alucerop@amd.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Gregory Price <gourry@gourry.net> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20260306164741.3796372-3-alejandro.lucero-palau@amd.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-03-06 16:47:39 +00:00