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/****************************************************************************
*
* The MIT License (MIT)
*
* Copyright (c) 2014 - 2018 Vivante Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*****************************************************************************
*
* The GPL License (GPL)
*
* Copyright (C) 2014 - 2018 Vivante Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*****************************************************************************
*
* Note: This software is released under dual MIT and GPL licenses. A
* recipient may use this file under the terms of either the MIT license or
* GPL License. If you wish to use only one license not the other, you can
* indicate your decision by deleting one of the above license notices in your
* version of this file.
*
*****************************************************************************/
#ifndef _GC_HAL_SECURITY_INTERFACE_H_
#define _GC_HAL_SECURITY_INTERFACE_H_
/*!
@brief Command codes between kernel module and TrustZone
@discussion
Critical services must be done in TrustZone to avoid sensitive content leak. Most of kernel module is kept in non-Secure os to minimize
code in TrustZone.
*/
typedef enum kernel_packet_command {
KERNEL_START_COMMAND,
KERNEL_SUBMIT,
KERNEL_MAP_MEMORY, /* */
KERNEL_UNMAP_MEMORY,
KERNEL_ALLOCATE_SECRUE_MEMORY, /*! Security memory management. */
KERNEL_FREE_SECURE_MEMORY,
KERNEL_EXECUTE, /* Execute a command buffer. */
KERNEL_DUMP_MMU_EXCEPTION,
KERNEL_HANDLE_MMU_EXCEPTION,
KERNEL_READ_MMU_EXCEPTION,
} kernel_packet_command_t;
struct kernel_start_command {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
gctUINT32 address;
gctUINT32 bytes;
};
/*!
@brief gckCOMMAND Object requests TrustZone to submit command buffer.
@discussion
Code in trustzone will check content of command buffer after copying command buffer to TrustZone.
*/
struct kernel_submit {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
gctUINT8 kernel_command; /*! Whether it is a kernel command. */
gctUINT32 command_buffer_handle; /*! Handle to command buffer. */
gctUINT32 offset; /* Offset in command buffer. */
gctUINT32 * command_buffer; /*! Content of command buffer need to be submit. */
gctUINT32 command_buffer_length; /*! Length of command buffer. */
};
/*!
@brief gckVIDMEM Object requests TrustZone to allocate security memory.
@discussion
Allocate a buffer from security GPU memory.
*/
struct kernel_allocate_security_memory {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT32 bytes; /*! Requested bytes. */
gctUINT32 memory_handle; /*! Handle of allocated memory. */
};
/*!
@brief gckVIDMEM Object requests TrustZone to allocate security memory.
@discussion
Free a video memory buffer from security GPU memory.
*/
struct kernel_free_security_memory {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT32 memory_handle; /*! Handle of allocated memory. */
};
struct kernel_execute {
kernel_packet_command_t command; /*! The command (always needs to be the first entry in a structure). */
gctUINT8 gpu; /*! Which GPU. */
gctUINT8 kernel_command; /*! Whether it is a kernel command. */
gctUINT32 * command_buffer; /*! Content of command buffer need to be submit. */
gctUINT32 command_buffer_length; /*! Length of command buffer. */
};
typedef struct kernel_map_scatter_gather {
gctUINT32 bytes;
gctUINT32 physical;
struct kernel_map_scatter_gather *next;
}
kernel_map_scatter_gather_t;
struct kernel_map_memory {
kernel_packet_command_t command;
kernel_map_scatter_gather_t *scatter;
gctUINT32 *physicals;
gctPHYS_ADDR_T physical; /*! Contiguous physical address range. */
gctUINT32 pageCount;
gctUINT32 gpuAddress;
};
struct kernel_unmap_memory {
gctUINT32 gpuAddress;
gctUINT32 pageCount;
};
struct kernel_read_mmu_exception {
gctUINT32 mmuStatus;
gctUINT32 mmuException;
};
struct kernel_handle_mmu_exception {
gctUINT32 mmuStatus;
gctPHYS_ADDR_T physical;
gctUINT32 gpuAddress;
};
typedef struct _gcsTA_INTERFACE {
kernel_packet_command_t command;
union {
struct kernel_submit Submit;
struct kernel_start_command StartCommand;
struct kernel_allocate_security_memory AllocateSecurityMemory;
struct kernel_execute Execute;
struct kernel_map_memory MapMemory;
struct kernel_unmap_memory UnmapMemory;
struct kernel_read_mmu_exception ReadMMUException;
struct kernel_handle_mmu_exception HandleMMUException;
} u;
gceSTATUS result;
} gcsTA_INTERFACE;
enum {
gcvTA_COMMAND_INIT,
gcvTA_COMMAND_DISPATCH,
gcvTA_CALLBACK_ALLOC_SECURE_MEM,
gcvTA_CALLBACK_FREE_SECURE_MEM,
};
#endif
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