From 0acf24ad7e10f547809faefb8069f8f5482eb4d9 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Wed, 22 Dec 2021 17:32:54 +0100 Subject: [PATCH] ACPICA: Add support for PCC Opregion special context data ACPICA commit 55526e8a6133cbf5a9cc0fb75a95dbbac6eb98e6 PCC Opregion added in ACPIC 6.3 requires special context data similar to GPIO and Generic Serial Bus as it needs to know the internal PCC buffer and its length as well as the PCC channel index when the opregion handler is being executed by the OSPM. Lets add support for the special context data needed by PCC Opregion. Link: https://github.com/acpica/acpica/commit/55526e8a Signed-off-by: Sudeep Holla Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpica/evregion.c | 10 ++++++++++ include/acpi/actypes.h | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c index 4ef43c8ef5e7..80b68f216b46 100644 --- a/drivers/acpi/acpica/evregion.c +++ b/drivers/acpi/acpica/evregion.c @@ -162,6 +162,16 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, return_ACPI_STATUS(AE_NOT_EXIST); } + if (region_obj->region.space_id == ACPI_ADR_SPACE_PLATFORM_COMM) { + struct acpi_pcc_info *ctx = + handler_desc->address_space.context; + + ctx->internal_buffer = + field_obj->field.internal_pcc_buffer; + ctx->length = region_obj->region.length; + ctx->subspace_id = region_obj->region.address; + } + /* * We must exit the interpreter because the region setup will * potentially execute control methods (for example, the _REG method diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 83a7ee1fbd7c..69e89d572b9e 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -1103,6 +1103,14 @@ struct acpi_connection_info { u8 access_length; }; +/* Special Context data for PCC Opregion (ACPI 6.3) */ + +struct acpi_pcc_info { + u8 subspace_id; + u16 length; + u8 *internal_buffer; +}; + typedef acpi_status (*acpi_adr_space_setup) (acpi_handle region_handle, u32 function,