46 lines
1.4 KiB
C
Executable file
46 lines
1.4 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* DMABUF Heap Secure Structure header to interface ldfw
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*
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* Copyright (C) 2021 Samsung Electronics Co., Ltd.
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* Author: <hyesoo.yu@samsung.com> for Samsung
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*/
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#ifndef _SECURE_BUFFER_H
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#define _SECURE_BUFFER_H
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#include <linux/arm-smccc.h>
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/*
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* struct buffer_prot_info - buffer protection information
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* @chunk_count: number of physically contiguous memory chunks to protect
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* each chunk should has the same size.
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* @dma_addr: device virtual address for protected memory access
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* @flags: protection flags but actually, protectid
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* @chunk_size: length in bytes of each chunk.
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* @bus_address: if @chunk_count is 1, this is the physical address the chunk.
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* if @chunk_count > 1, this is the physical address of unsigned
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* long array of @chunk_count elements that contains the physical
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* address of each chunk.
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*/
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struct buffer_prot_info {
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unsigned int chunk_count;
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unsigned int dma_addr;
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unsigned int flags;
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unsigned int chunk_size;
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unsigned long bus_address;
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};
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#define SMC_DRM_PPMP_PROT (0x82002110)
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#define SMC_DRM_PPMP_UNPROT (0x82002111)
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static inline unsigned long ppmp_smc(unsigned long cmd, unsigned long arg0,
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unsigned long arg1, unsigned long arg2)
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{
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struct arm_smccc_res res;
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arm_smccc_smc(cmd, arg0, arg1, arg2, 0, 0, 0, 0, &res);
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return (unsigned long)res.a0;
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}
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#endif
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