mirror of
https://github.com/LineageOS/android_kernel_samsung_msm8226.git
synced 2026-09-29 00:00:25 +02:00
Olav Haugan
8726caf1e6
Due to performance issues with 4K pages and the IOMMU we should use 64K pages. However, minimum allocation from ION is 4K so instead of mapping on demand we need to map the full heap into the IOMMU when the first request for mapping comes. Only unmap everything from the IOMMU when the last buffer is freed. CRs-fixed: 348606 Change-Id: Ic1793f5caaff2f69bf1fb7e8c8b3bd03378131b8 Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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*
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* Copyright (c) 2011-2012, Code Aurora Forum. 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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*/
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#ifndef _FMEM_H_
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#define _FMEM_H_
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#include <linux/vmalloc.h>
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struct fmem_platform_data {
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unsigned long phys;
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unsigned long size;
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unsigned long reserved_size_low;
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unsigned long reserved_size_high;
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unsigned long align;
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};
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struct fmem_data {
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unsigned long phys;
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void *virt;
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struct vm_struct *area;
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unsigned long size;
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unsigned long reserved_size_low;
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unsigned long reserved_size_high;
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};
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enum fmem_state {
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FMEM_UNINITIALIZED = 0,
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FMEM_C_STATE,
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FMEM_T_STATE,
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FMEM_O_STATE,
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};
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#ifdef CONFIG_QCACHE
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struct fmem_data *fmem_get_info(void);
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int fmem_set_state(enum fmem_state);
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void lock_fmem_state(void);
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void unlock_fmem_state(void);
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void *fmem_map_virtual_area(int cacheability);
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void fmem_unmap_virtual_area(void);
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#else
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static inline struct fmem_data *fmem_get_info(void) { return NULL; }
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static inline int fmem_set_state(enum fmem_state f) { return -ENODEV; }
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static inline void lock_fmem_state(void) { return; }
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static inline void unlock_fmem_state(void) { return; }
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static inline void *fmem_map_virtual_area(int cacheability) { return NULL; }
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static inline void fmem_unmap_virtual_area(void) { return; }
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#endif
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int request_fmem_c_region(void *unused);
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int release_fmem_c_region(void *unused);
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#endif
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