108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
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/*
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* Copyright (c) 2012, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef ION_CP_COMMON_H
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#define ION_CP_COMMON_H
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#include <asm-generic/errno-base.h>
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#include <linux/msm_ion.h>
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#define ION_CP_V1 1
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#define ION_CP_V2 2
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struct ion_cp_buffer {
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phys_addr_t buffer;
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atomic_t secure_cnt;
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int is_secure;
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int want_delayed_unsecure;
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/*
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* Currently all user/kernel mapping is protected by the heap lock.
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* This is sufficient to protect the map count as well. The lock
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* should be used to protect map_cnt if the whole heap lock is
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* ever removed.
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*/
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atomic_t map_cnt;
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/*
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* protects secure_cnt for securing.
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*/
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struct mutex lock;
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int version;
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void *data;
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};
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#if defined(CONFIG_ION_MSM)
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/*
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* ion_cp2_protect_mem - secures memory via trustzone
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*
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* @chunks - physical address of the array containing the chunks to
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* be locked down
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* @nchunks - number of entries in the array
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* @chunk_size - size of each memory chunk
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* @usage - usage hint
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* @lock - 1 for lock, 0 for unlock
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*
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* return value is the result of the scm call
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*/
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int ion_cp_change_chunks_state(unsigned long chunks, unsigned int nchunks,
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unsigned int chunk_size, enum cp_mem_usage usage,
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int lock);
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int ion_cp_protect_mem(unsigned int phy_base, unsigned int size,
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unsigned int permission_type, int version,
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void *data);
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int ion_cp_unprotect_mem(unsigned int phy_base, unsigned int size,
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unsigned int permission_type, int version,
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void *data);
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int ion_cp_secure_buffer(struct ion_buffer *buffer, int version, void *data,
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int flags);
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int ion_cp_unsecure_buffer(struct ion_buffer *buffer, int force_unsecure);
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#else
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static inline int ion_cp_change_chunks_state(unsigned long chunks,
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unsigned int nchunks, unsigned int chunk_size,
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enum cp_mem_usage usage, int lock)
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{
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return -ENODEV;
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}
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static inline int ion_cp_protect_mem(unsigned int phy_base, unsigned int size,
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unsigned int permission_type, int version,
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void *data)
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{
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return -ENODEV;
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}
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static inline int ion_cp_unprotect_mem(unsigned int phy_base, unsigned int size,
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unsigned int permission_type, int version,
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void *data)
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{
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return -ENODEV;
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}
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static inline int ion_cp_secure_buffer(struct ion_buffer *buffer, int version,
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void *data, int flags)
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{
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return -ENODEV;
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}
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static inline int ion_cp_unsecure_buffer(struct ion_buffer *buffer,
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int force_unsecure)
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{
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return -ENODEV;
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}
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#endif
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#endif
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