142 lines
4.6 KiB
C
142 lines
4.6 KiB
C
/*
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*
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* (C) COPYRIGHT 2010, 2012-2015 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained
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* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/**
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* @file mali_uk.h
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* Types and definitions that are common across OSs for both the user
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* and kernel side of the User-Kernel interface.
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*/
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#ifndef _UK_H_
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#define _UK_H_
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* @addtogroup base_api
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* @{
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*/
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/**
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* @defgroup uk_api User-Kernel Interface API
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*
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* The User-Kernel Interface abstracts the communication mechanism between the user and kernel-side code of device
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* drivers developed as part of the Midgard DDK. Currently that includes the Base driver and the UMP driver.
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*
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* It exposes an OS independent API to user-side code (UKU) which routes functions calls to an OS-independent
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* kernel-side API (UKK) via an OS-specific communication mechanism.
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*
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* This API is internal to the Midgard DDK and is not exposed to any applications.
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*
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* @{
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*/
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/**
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* These are identifiers for kernel-side drivers implementing a UK interface, aka UKK clients. The
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* UK module maps this to an OS specific device name, e.g. "gpu_base" -> "GPU0:". Specify this
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* identifier to select a UKK client to the uku_open() function.
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*
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* When a new UKK client driver is created a new identifier needs to be added to the uk_client_id
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* enumeration and the uku_open() implemenation for the various OS ports need to be updated to
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* provide a mapping of the identifier to the OS specific device name.
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*
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*/
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enum uk_client_id {
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/**
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* Value used to identify the Base driver UK client.
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*/
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UK_CLIENT_MALI_T600_BASE,
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/** The number of uk clients supported. This must be the last member of the enum */
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UK_CLIENT_COUNT
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};
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/**
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* Each function callable through the UK interface has a unique number.
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* Functions provided by UK clients start from number UK_FUNC_ID.
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* Numbers below UK_FUNC_ID are used for internal UK functions.
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*/
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enum uk_func {
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UKP_FUNC_ID_CHECK_VERSION, /**< UKK Core internal function */
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/**
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* Each UK client numbers the functions they provide starting from
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* number UK_FUNC_ID. This number is then eventually assigned to the
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* id field of the union uk_header structure when preparing to make a
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* UK call. See your UK client for a list of their function numbers.
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*/
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UK_FUNC_ID = 512
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};
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/**
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* Arguments for a UK call are stored in a structure. This structure consists
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* of a fixed size header and a payload. The header carries a 32-bit number
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* identifying the UK function to be called (see uk_func). When the UKK client
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* receives this header and executed the requested UK function, it will use
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* the same header to store the result of the function in the form of a
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* int return code. The size of this structure is such that the
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* first member of the payload following the header can be accessed efficiently
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* on a 32 and 64-bit kernel and the structure has the same size regardless
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* of a 32 or 64-bit kernel. The uk_kernel_size_type type should be defined
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* accordingly in the OS specific mali_uk_os.h header file.
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*/
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union uk_header {
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/**
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* 32-bit number identifying the UK function to be called.
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* Also see uk_func.
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*/
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u32 id;
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/**
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* The int return code returned by the called UK function.
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* See the specification of the particular UK function you are
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* calling for the meaning of the error codes returned. All
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* UK functions return 0 on success.
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*/
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u32 ret;
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/*
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* Used to ensure 64-bit alignment of this union. Do not remove.
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* This field is used for padding and does not need to be initialized.
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*/
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u64 sizer;
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};
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/**
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* This structure carries a 16-bit major and minor number and is sent along with an internal UK call
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* used during uku_open to identify the versions of the UK module in use by the user-side and kernel-side.
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*/
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struct uku_version_check_args {
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union uk_header header;
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/**< UK call header */
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u16 major;
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/**< This field carries the user-side major version on input and the kernel-side major version on output */
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u16 minor;
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/**< This field carries the user-side minor version on input and the kernel-side minor version on output. */
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u8 padding[4];
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};
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/** @} end group uk_api */
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/** @} *//* end group base_api */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _UK_H_ */
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