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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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ACPICA: Split large interpreter file
New file: exserial.c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Schmauss <erik.schmauss@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
e324e10109
commit
9e9f8733a9
4 changed files with 381 additions and 364 deletions
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@ -65,6 +65,7 @@ acpi-y += \
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exresnte.o \
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exresolv.o \
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exresop.o \
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exserial.o \
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exstore.o \
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exstoren.o \
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exstorob.o \
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@ -270,6 +270,26 @@ acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc,
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acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info);
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/*
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* exserial - field_unit support for serial address spaces
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*/
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acpi_status
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acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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acpi_status
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acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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acpi_status
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acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer);
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acpi_status
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acpi_ex_write_gpio(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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/*
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* exsystem - Interface to OS services
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*/
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@ -16,31 +16,12 @@
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exfield")
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/* Local prototypes */
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static acpi_status
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acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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static acpi_status
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acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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static acpi_status
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acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer);
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static acpi_status
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acpi_ex_write_gpio(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer);
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/*
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* This table maps the various Attrib protocols to the byte transfer
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* length. Used for the generic serial bus.
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*/
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#define ACPI_INVALID_PROTOCOL_ID 0x80
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#define ACPI_MAX_PROTOCOL_ID 0x0F
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const u8 acpi_protocol_lengths[] = {
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ACPI_INVALID_PROTOCOL_ID, /* 0 - reserved */
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ACPI_INVALID_PROTOCOL_ID, /* 1 - reserved */
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@ -343,348 +324,3 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_read_gpio
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*
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* PARAMETERS: obj_desc - The named field to read
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* buffer - Where the return data is returnd
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from a named field that references a Generic Serial Bus
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* field
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE_PTR(ex_read_gpio, obj_desc);
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/*
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* For GPIO (general_purpose_io), the Address will be the bit offset
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* from the previous Connection() operator, making it effectively a
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* pin number index. The bit_length is the length of the field, which
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* is thus the number of pins.
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"GPIO FieldRead [FROM]: Pin %u Bits %u\n",
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obj_desc->field.pin_number_index,
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obj_desc->field.bit_length));
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Perform the read */
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status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_READ);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_write_gpio
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*
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* PARAMETERS: source_desc - Contains data to write. Expect to be
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* an Integer object.
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* obj_desc - The named field
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* result_desc - Where the return value is returned, if any
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to a named field that references a General Purpose I/O
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* field.
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_write_gpio(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer)
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{
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acpi_status status;
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void *buffer;
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ACPI_FUNCTION_TRACE_PTR(ex_write_gpio, obj_desc);
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/*
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* For GPIO (general_purpose_io), we will bypass the entire field
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* mechanism and handoff the bit address and bit width directly to
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* the handler. The Address will be the bit offset
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* from the previous Connection() operator, making it effectively a
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* pin number index. The bit_length is the length of the field, which
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* is thus the number of pins.
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*/
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if (source_desc->common.type != ACPI_TYPE_INTEGER) {
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"GPIO FieldWrite [FROM]: (%s:%X), Value %.8X [TO]: Pin %u Bits %u\n",
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acpi_ut_get_type_name(source_desc->common.type),
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source_desc->common.type,
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(u32)source_desc->integer.value,
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obj_desc->field.pin_number_index,
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obj_desc->field.bit_length));
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buffer = &source_desc->integer.value;
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Perform the write */
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status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_WRITE);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_read_serial_bus
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*
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* PARAMETERS: obj_desc - The named field to read
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* return_buffer - Where the return value is returned, if any
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from a named field that references a serial bus
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* (SMBus, IPMI, or GSBus).
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer)
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{
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acpi_status status;
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u32 buffer_length;
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union acpi_operand_object *buffer_desc;
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u32 function;
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u16 accessor_type;
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ACPI_FUNCTION_TRACE_PTR(ex_read_serial_bus, obj_desc);
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/*
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* This is an SMBus, GSBus or IPMI read. We must create a buffer to
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* hold the data and then directly access the region handler.
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*
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* Note: SMBus and GSBus protocol value is passed in upper 16-bits
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* of Function
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*
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* Common buffer format:
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* Status; (Byte 0 of the data buffer)
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* Length; (Byte 1 of the data buffer)
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* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
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*/
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switch (obj_desc->field.region_obj->region.space_id) {
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case ACPI_ADR_SPACE_SMBUS:
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buffer_length = ACPI_SMBUS_BUFFER_SIZE;
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function = ACPI_READ | (obj_desc->field.attribute << 16);
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break;
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case ACPI_ADR_SPACE_IPMI:
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buffer_length = ACPI_IPMI_BUFFER_SIZE;
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function = ACPI_READ;
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break;
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case ACPI_ADR_SPACE_GSBUS:
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accessor_type = obj_desc->field.attribute;
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if (accessor_type == AML_FIELD_ATTRIB_RAW_PROCESS_BYTES) {
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ACPI_ERROR((AE_INFO,
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"Invalid direct read using bidirectional write-then-read protocol"));
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return_ACPI_STATUS(AE_AML_PROTOCOL);
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}
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status =
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acpi_ex_get_protocol_buffer_length(accessor_type,
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&buffer_length);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO,
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"Invalid protocol ID for GSBus: 0x%4.4X",
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accessor_type));
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return_ACPI_STATUS(status);
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}
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/* Add header length to get the full size of the buffer */
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buffer_length += ACPI_SERIAL_HEADER_SIZE;
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function = ACPI_READ | (accessor_type << 16);
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break;
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default:
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return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
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}
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/* Create the local transfer buffer that is returned to the caller */
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buffer_desc = acpi_ut_create_buffer_object(buffer_length);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Call the region handler for the write-then-read */
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status = acpi_ex_access_region(obj_desc, 0,
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ACPI_CAST_PTR(u64,
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buffer_desc->buffer.
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pointer), function);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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*return_buffer = buffer_desc;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_write_serial_bus
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*
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* PARAMETERS: source_desc - Contains data to write
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* obj_desc - The named field
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* return_buffer - Where the return value is returned, if any
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write to a named field that references a serial bus
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* (SMBus, IPMI, GSBus).
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object **return_buffer)
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{
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acpi_status status;
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u32 buffer_length;
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u32 data_length;
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void *buffer;
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union acpi_operand_object *buffer_desc;
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u32 function;
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u16 accessor_type;
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ACPI_FUNCTION_TRACE_PTR(ex_write_serial_bus, obj_desc);
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/*
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* This is an SMBus, GSBus or IPMI write. We will bypass the entire
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* field mechanism and handoff the buffer directly to the handler.
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* For these address spaces, the buffer is bidirectional; on a
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* write, return data is returned in the same buffer.
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*
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* Source must be a buffer of sufficient size, these are fixed size:
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* ACPI_SMBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE.
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*
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* Note: SMBus and GSBus protocol type is passed in upper 16-bits
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* of Function
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*
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* Common buffer format:
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* Status; (Byte 0 of the data buffer)
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* Length; (Byte 1 of the data buffer)
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* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
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*/
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if (source_desc->common.type != ACPI_TYPE_BUFFER) {
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ACPI_ERROR((AE_INFO,
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"SMBus/IPMI/GenericSerialBus write requires "
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"Buffer, found type %s",
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acpi_ut_get_object_type_name(source_desc)));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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switch (obj_desc->field.region_obj->region.space_id) {
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case ACPI_ADR_SPACE_SMBUS:
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buffer_length = ACPI_SMBUS_BUFFER_SIZE;
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data_length = ACPI_SMBUS_DATA_SIZE;
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function = ACPI_WRITE | (obj_desc->field.attribute << 16);
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break;
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case ACPI_ADR_SPACE_IPMI:
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buffer_length = ACPI_IPMI_BUFFER_SIZE;
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data_length = ACPI_IPMI_DATA_SIZE;
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function = ACPI_WRITE;
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break;
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case ACPI_ADR_SPACE_GSBUS:
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accessor_type = obj_desc->field.attribute;
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status =
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acpi_ex_get_protocol_buffer_length(accessor_type,
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&buffer_length);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO,
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"Invalid protocol ID for GSBus: 0x%4.4X",
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accessor_type));
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return_ACPI_STATUS(status);
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}
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/* Add header length to get the full size of the buffer */
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buffer_length += ACPI_SERIAL_HEADER_SIZE;
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data_length = source_desc->buffer.pointer[1];
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function = ACPI_WRITE | (accessor_type << 16);
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break;
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default:
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return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
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}
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#if 0
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OBSOLETE ?
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/* Check for possible buffer overflow */
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if (data_length > source_desc->buffer.length) {
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ACPI_ERROR((AE_INFO,
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"Length in buffer header (%u)(%u) is greater than "
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"the physical buffer length (%u) and will overflow",
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data_length, buffer_length,
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source_desc->buffer.length));
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return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
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}
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#endif
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/* Create the transfer/bidirectional/return buffer */
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buffer_desc = acpi_ut_create_buffer_object(buffer_length);
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if (!buffer_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Copy the input buffer data to the transfer buffer */
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buffer = buffer_desc->buffer.pointer;
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memcpy(buffer, source_desc->buffer.pointer, data_length);
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/*
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* Perform the write (returns status and perhaps data in the
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* same buffer)
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*/
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status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, function);
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acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
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*return_buffer = buffer_desc;
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return_ACPI_STATUS(status);
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}
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360
drivers/acpi/acpica/exserial.c
Normal file
360
drivers/acpi/acpica/exserial.c
Normal file
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@ -0,0 +1,360 @@
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: exserial - field_unit support for serial address spaces
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*
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* Copyright (C) 2000 - 2018, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exserial")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_read_gpio
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*
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* PARAMETERS: obj_desc - The named field to read
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* buffer - Where the return data is returnd
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read from a named field that references a Generic Serial Bus
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* field
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*
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******************************************************************************/
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acpi_status acpi_ex_read_gpio(union acpi_operand_object *obj_desc, void *buffer)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE_PTR(ex_read_gpio, obj_desc);
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/*
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* For GPIO (general_purpose_io), the Address will be the bit offset
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* from the previous Connection() operator, making it effectively a
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* pin number index. The bit_length is the length of the field, which
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* is thus the number of pins.
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
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"GPIO FieldRead [FROM]: Pin %u Bits %u\n",
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obj_desc->field.pin_number_index,
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obj_desc->field.bit_length));
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/* Lock entire transaction if requested */
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acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
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/* Perform the read */
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|
||||
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_READ);
|
||||
|
||||
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: acpi_ex_write_gpio
|
||||
*
|
||||
* PARAMETERS: source_desc - Contains data to write. Expect to be
|
||||
* an Integer object.
|
||||
* obj_desc - The named field
|
||||
* result_desc - Where the return value is returned, if any
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Write to a named field that references a General Purpose I/O
|
||||
* field.
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
acpi_status
|
||||
acpi_ex_write_gpio(union acpi_operand_object *source_desc,
|
||||
union acpi_operand_object *obj_desc,
|
||||
union acpi_operand_object **return_buffer)
|
||||
{
|
||||
acpi_status status;
|
||||
void *buffer;
|
||||
|
||||
ACPI_FUNCTION_TRACE_PTR(ex_write_gpio, obj_desc);
|
||||
|
||||
/*
|
||||
* For GPIO (general_purpose_io), we will bypass the entire field
|
||||
* mechanism and handoff the bit address and bit width directly to
|
||||
* the handler. The Address will be the bit offset
|
||||
* from the previous Connection() operator, making it effectively a
|
||||
* pin number index. The bit_length is the length of the field, which
|
||||
* is thus the number of pins.
|
||||
*/
|
||||
if (source_desc->common.type != ACPI_TYPE_INTEGER) {
|
||||
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||||
}
|
||||
|
||||
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
|
||||
"GPIO FieldWrite [FROM]: (%s:%X), Value %.8X [TO]: Pin %u Bits %u\n",
|
||||
acpi_ut_get_type_name(source_desc->common.type),
|
||||
source_desc->common.type,
|
||||
(u32)source_desc->integer.value,
|
||||
obj_desc->field.pin_number_index,
|
||||
obj_desc->field.bit_length));
|
||||
|
||||
buffer = &source_desc->integer.value;
|
||||
|
||||
/* Lock entire transaction if requested */
|
||||
|
||||
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
||||
|
||||
/* Perform the write */
|
||||
|
||||
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, ACPI_WRITE);
|
||||
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: acpi_ex_read_serial_bus
|
||||
*
|
||||
* PARAMETERS: obj_desc - The named field to read
|
||||
* return_buffer - Where the return value is returned, if any
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Read from a named field that references a serial bus
|
||||
* (SMBus, IPMI, or GSBus).
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
acpi_status
|
||||
acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
|
||||
union acpi_operand_object **return_buffer)
|
||||
{
|
||||
acpi_status status;
|
||||
u32 buffer_length;
|
||||
union acpi_operand_object *buffer_desc;
|
||||
u32 function;
|
||||
u16 accessor_type;
|
||||
|
||||
ACPI_FUNCTION_TRACE_PTR(ex_read_serial_bus, obj_desc);
|
||||
|
||||
/*
|
||||
* This is an SMBus, GSBus or IPMI read. We must create a buffer to
|
||||
* hold the data and then directly access the region handler.
|
||||
*
|
||||
* Note: SMBus and GSBus protocol value is passed in upper 16-bits
|
||||
* of Function
|
||||
*
|
||||
* Common buffer format:
|
||||
* Status; (Byte 0 of the data buffer)
|
||||
* Length; (Byte 1 of the data buffer)
|
||||
* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
|
||||
*/
|
||||
switch (obj_desc->field.region_obj->region.space_id) {
|
||||
case ACPI_ADR_SPACE_SMBUS:
|
||||
|
||||
buffer_length = ACPI_SMBUS_BUFFER_SIZE;
|
||||
function = ACPI_READ | (obj_desc->field.attribute << 16);
|
||||
break;
|
||||
|
||||
case ACPI_ADR_SPACE_IPMI:
|
||||
|
||||
buffer_length = ACPI_IPMI_BUFFER_SIZE;
|
||||
function = ACPI_READ;
|
||||
break;
|
||||
|
||||
case ACPI_ADR_SPACE_GSBUS:
|
||||
|
||||
accessor_type = obj_desc->field.attribute;
|
||||
if (accessor_type == AML_FIELD_ATTRIB_RAW_PROCESS_BYTES) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"Invalid direct read using bidirectional write-then-read protocol"));
|
||||
|
||||
return_ACPI_STATUS(AE_AML_PROTOCOL);
|
||||
}
|
||||
|
||||
status =
|
||||
acpi_ex_get_protocol_buffer_length(accessor_type,
|
||||
&buffer_length);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"Invalid protocol ID for GSBus: 0x%4.4X",
|
||||
accessor_type));
|
||||
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
/* Add header length to get the full size of the buffer */
|
||||
|
||||
buffer_length += ACPI_SERIAL_HEADER_SIZE;
|
||||
function = ACPI_READ | (accessor_type << 16);
|
||||
break;
|
||||
|
||||
default:
|
||||
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
|
||||
}
|
||||
|
||||
/* Create the local transfer buffer that is returned to the caller */
|
||||
|
||||
buffer_desc = acpi_ut_create_buffer_object(buffer_length);
|
||||
if (!buffer_desc) {
|
||||
return_ACPI_STATUS(AE_NO_MEMORY);
|
||||
}
|
||||
|
||||
/* Lock entire transaction if requested */
|
||||
|
||||
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
||||
|
||||
/* Call the region handler for the write-then-read */
|
||||
|
||||
status = acpi_ex_access_region(obj_desc, 0,
|
||||
ACPI_CAST_PTR(u64,
|
||||
buffer_desc->buffer.
|
||||
pointer), function);
|
||||
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
||||
|
||||
*return_buffer = buffer_desc;
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: acpi_ex_write_serial_bus
|
||||
*
|
||||
* PARAMETERS: source_desc - Contains data to write
|
||||
* obj_desc - The named field
|
||||
* return_buffer - Where the return value is returned, if any
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Write to a named field that references a serial bus
|
||||
* (SMBus, IPMI, GSBus).
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
acpi_status
|
||||
acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
|
||||
union acpi_operand_object *obj_desc,
|
||||
union acpi_operand_object **return_buffer)
|
||||
{
|
||||
acpi_status status;
|
||||
u32 buffer_length;
|
||||
u32 data_length;
|
||||
void *buffer;
|
||||
union acpi_operand_object *buffer_desc;
|
||||
u32 function;
|
||||
u16 accessor_type;
|
||||
|
||||
ACPI_FUNCTION_TRACE_PTR(ex_write_serial_bus, obj_desc);
|
||||
|
||||
/*
|
||||
* This is an SMBus, GSBus or IPMI write. We will bypass the entire
|
||||
* field mechanism and handoff the buffer directly to the handler.
|
||||
* For these address spaces, the buffer is bidirectional; on a
|
||||
* write, return data is returned in the same buffer.
|
||||
*
|
||||
* Source must be a buffer of sufficient size, these are fixed size:
|
||||
* ACPI_SMBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE.
|
||||
*
|
||||
* Note: SMBus and GSBus protocol type is passed in upper 16-bits
|
||||
* of Function
|
||||
*
|
||||
* Common buffer format:
|
||||
* Status; (Byte 0 of the data buffer)
|
||||
* Length; (Byte 1 of the data buffer)
|
||||
* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
|
||||
*/
|
||||
if (source_desc->common.type != ACPI_TYPE_BUFFER) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"SMBus/IPMI/GenericSerialBus write requires "
|
||||
"Buffer, found type %s",
|
||||
acpi_ut_get_object_type_name(source_desc)));
|
||||
|
||||
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||||
}
|
||||
|
||||
switch (obj_desc->field.region_obj->region.space_id) {
|
||||
case ACPI_ADR_SPACE_SMBUS:
|
||||
|
||||
buffer_length = ACPI_SMBUS_BUFFER_SIZE;
|
||||
data_length = ACPI_SMBUS_DATA_SIZE;
|
||||
function = ACPI_WRITE | (obj_desc->field.attribute << 16);
|
||||
break;
|
||||
|
||||
case ACPI_ADR_SPACE_IPMI:
|
||||
|
||||
buffer_length = ACPI_IPMI_BUFFER_SIZE;
|
||||
data_length = ACPI_IPMI_DATA_SIZE;
|
||||
function = ACPI_WRITE;
|
||||
break;
|
||||
|
||||
case ACPI_ADR_SPACE_GSBUS:
|
||||
|
||||
accessor_type = obj_desc->field.attribute;
|
||||
status =
|
||||
acpi_ex_get_protocol_buffer_length(accessor_type,
|
||||
&buffer_length);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"Invalid protocol ID for GSBus: 0x%4.4X",
|
||||
accessor_type));
|
||||
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
/* Add header length to get the full size of the buffer */
|
||||
|
||||
buffer_length += ACPI_SERIAL_HEADER_SIZE;
|
||||
data_length = source_desc->buffer.pointer[1];
|
||||
function = ACPI_WRITE | (accessor_type << 16);
|
||||
break;
|
||||
|
||||
default:
|
||||
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
|
||||
}
|
||||
|
||||
#if 0
|
||||
OBSOLETE ?
|
||||
/* Check for possible buffer overflow */
|
||||
if (data_length > source_desc->buffer.length) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"Length in buffer header (%u)(%u) is greater than "
|
||||
"the physical buffer length (%u) and will overflow",
|
||||
data_length, buffer_length,
|
||||
source_desc->buffer.length));
|
||||
|
||||
return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Create the transfer/bidirectional/return buffer */
|
||||
|
||||
buffer_desc = acpi_ut_create_buffer_object(buffer_length);
|
||||
if (!buffer_desc) {
|
||||
return_ACPI_STATUS(AE_NO_MEMORY);
|
||||
}
|
||||
|
||||
/* Copy the input buffer data to the transfer buffer */
|
||||
|
||||
buffer = buffer_desc->buffer.pointer;
|
||||
memcpy(buffer, source_desc->buffer.pointer, data_length);
|
||||
|
||||
/* Lock entire transaction if requested */
|
||||
|
||||
acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags);
|
||||
|
||||
/*
|
||||
* Perform the write (returns status and perhaps data in the
|
||||
* same buffer)
|
||||
*/
|
||||
status = acpi_ex_access_region(obj_desc, 0, (u64 *)buffer, function);
|
||||
acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
|
||||
|
||||
*return_buffer = buffer_desc;
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
Loading…
Reference in a new issue