1 /* 2 * Copyright (c) 2011-2017, The Linux Foundation. All rights reserved. 3 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef __GR_ION_ALLOC_H__ 31 #define __GR_ION_ALLOC_H__ 32 33 #include <linux/msm_ion.h> 34 35 #define FD_INIT -1 36 37 namespace gralloc1 { 38 39 enum { 40 CACHE_CLEAN = 0x1, 41 CACHE_INVALIDATE, 42 CACHE_CLEAN_AND_INVALIDATE, 43 }; 44 45 struct AllocData { 46 void *base = NULL; 47 int fd = -1; 48 int ion_handle = -1; 49 unsigned int offset = 0; 50 unsigned int size = 0; 51 unsigned int align = 1; 52 uintptr_t handle = 0; 53 bool uncached = false; 54 unsigned int flags = 0x0; 55 unsigned int heap_id = 0x0; 56 unsigned int alloc_type = 0x0; 57 }; 58 59 class IonAlloc { 60 public: IonAlloc()61 IonAlloc() { ion_dev_fd_ = FD_INIT; } 62 ~IonAlloc()63 ~IonAlloc() { CloseIonDevice(); } 64 65 bool Init(); 66 int AllocBuffer(AllocData *data); 67 int FreeBuffer(void *base, unsigned int size, unsigned int offset, int fd, int ion_handle); 68 int MapBuffer(void **base, unsigned int size, unsigned int offset, int fd); 69 int UnmapBuffer(void *base, unsigned int size, unsigned int offset); 70 int CleanBuffer(void *base, unsigned int size, unsigned int offset, int fd, int op); 71 72 private: 73 const char *kIonDevice = "/dev/ion"; 74 75 int OpenIonDevice(); 76 void CloseIonDevice(); 77 78 int ion_dev_fd_; 79 }; 80 81 } // namespace gralloc1 82 83 #endif // __GR_ION_ALLOC_H__ 84