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ACPICA: Add support for FFH Opregion special context data

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ACPICA commit fad527b6e76babc7527c41325bfbef6bd1a1132b

FFH(Fixed Function Hardware) Opregion is approved to be added in ACPI 6.5 via
code first approach [1]. It requires special context data similar to GPIO and
Generic Serial Bus as it needs to know platform specific offset and length.

Add support for the special context data needed by FFH Opregion.

FFH op_region enables advanced use of FFH on some architectures. For example,
it could be used to easily proxy AML code to architecture-specific behavior
(to ensure it is OS initiated)

Actual behavior of FFH is ofcourse architecture specific and depends on
the FFH bindings. The offset and length could have arch specific meaning
or usage.

Link: https://bugzilla.tianocore.org/show_bug.cgi?id=3598 # [1]
Link: https://github.com/acpica/acpica/commit/fad527b6
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sudeep Holla 2022-10-27 19:54:32 +02:00 committed by Rafael J. Wysocki
parent e92e4a451c
commit ee64b827a9
5 changed files with 30 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/acpi/acpica/evregion.c
View File

@ -172,6 +172,15 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
ctx->subspace_id = (u8)region_obj->region.address;
}
if (region_obj->region.space_id ==
ACPI_ADR_SPACE_FIXED_HARDWARE) {
struct acpi_ffh_info *ctx =
handler_desc->address_space.context;
ctx->length = region_obj->region.length;
ctx->offset = region_obj->region.address;
}
/*
* We must exit the interpreter because the region setup will
* potentially execute control methods (for example, the _REG method

8
drivers/acpi/acpica/exfield.c
View File

@ -141,7 +141,9 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_IPMI
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_PLATFORM_RT)) {
ACPI_ADR_SPACE_PLATFORM_RT
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_FIXED_HARDWARE)) {
/* SMBus, GSBus, IPMI serial */
@ -305,7 +307,9 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_IPMI
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_PLATFORM_RT)) {
ACPI_ADR_SPACE_PLATFORM_RT
|| obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_FIXED_HARDWARE)) {
/* SMBus, GSBus, IPMI serial */

6
drivers/acpi/acpica/exserial.c
View File

@ -323,6 +323,12 @@ acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
function = ACPI_WRITE;
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
buffer_length = ACPI_FFH_INPUT_BUFFER_SIZE;
function = ACPI_WRITE;
break;
default:
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
}

2
include/acpi/acconfig.h
View File

@ -190,6 +190,8 @@
#define ACPI_PRM_INPUT_BUFFER_SIZE 26
#define ACPI_FFH_INPUT_BUFFER_SIZE 256
/* _sx_d and _sx_w control methods */
#define ACPI_NUM_sx_d_METHODS 4

7
include/acpi/actypes.h
View File

@ -1116,6 +1116,13 @@ struct acpi_pcc_info {
u8 *internal_buffer;
};
/* Special Context data for FFH Opregion (ACPI 6.5) */
struct acpi_ffh_info {
u64 offset;
u64 length;
};
typedef
acpi_status (*acpi_adr_space_setup) (acpi_handle region_handle,
u32 function,