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      1 /*
      2  * Copyright (c) 2011-2012, 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 GRALLOC_IONALLOC_H
     31 #define GRALLOC_IONALLOC_H
     32 
     33 #include <linux/msm_ion.h>
     34 #include "memalloc.h"
     35 #include "gr.h"
     36 
     37 namespace gralloc {
     38 
     39 class IonAlloc : public IMemAlloc  {
     40 
     41     public:
     42     virtual int alloc_buffer(alloc_data& data);
     43 
     44     virtual int free_buffer(void *base, size_t size,
     45                             int offset, int fd);
     46 
     47     virtual int map_buffer(void **pBase, size_t size,
     48                            int offset, int fd);
     49 
     50     virtual int unmap_buffer(void *base, size_t size,
     51                              int offset);
     52 
     53     virtual int clean_buffer(void*base, size_t size,
     54                              int offset, int fd, int op);
     55 
     56     IonAlloc() { mIonFd = FD_INIT; }
     57 
     58     ~IonAlloc() { close_device(); }
     59 
     60     private:
     61     int mIonFd;
     62 
     63     int open_device();
     64 
     65     void close_device();
     66 
     67     mutable Locker mLock;
     68 
     69 };
     70 
     71 }
     72 
     73 #endif /* GRALLOC_IONALLOC_H */
     74 
     75