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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef GRALLOC_PRIV_H_
     18 #define GRALLOC_PRIV_H_
     19 
     20 #include <stdint.h>
     21 #include <limits.h>
     22 #include <sys/cdefs.h>
     23 #include <hardware/gralloc.h>
     24 #include <pthread.h>
     25 #include <errno.h>
     26 #include <unistd.h>
     27 
     28 #include <cutils/native_handle.h>
     29 
     30 #include <linux/fb.h>
     31 
     32 /*****************************************************************************/
     33 
     34 struct private_module_t;
     35 struct private_handle_t;
     36 
     37 struct private_module_t {
     38     gralloc_module_t base;
     39 
     40     struct private_handle_t* framebuffer;
     41     uint32_t flags;
     42     uint32_t numBuffers;
     43     uint32_t bufferMask;
     44     pthread_mutex_t lock;
     45     buffer_handle_t currentBuffer;
     46     int pmem_master;
     47     void* pmem_master_base;
     48     unsigned long master_phys;
     49     int gpu;
     50     void* gpu_base;
     51     int fb_map_offset;
     52 
     53     struct fb_var_screeninfo info;
     54     struct fb_fix_screeninfo finfo;
     55     float xdpi;
     56     float ydpi;
     57     float fps;
     58 };
     59 
     60 /*****************************************************************************/
     61 
     62 #ifdef __cplusplus
     63 struct private_handle_t : public native_handle {
     64 #else
     65 struct private_handle_t {
     66     native_handle_t nativeHandle;
     67 #endif
     68 
     69     enum {
     70         PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
     71         PRIV_FLAGS_USES_PMEM   = 0x00000002,
     72         PRIV_FLAGS_USES_GPU    = 0x00000004,
     73     };
     74 
     75     // file-descriptors
     76     int     fd;
     77     // ints
     78     int     magic;
     79     int     flags;
     80     int     size;
     81     int     offset;
     82     int     gpu_fd; // stored as an int, b/c we don't want it marshalled
     83 
     84     // FIXME: the attributes below should be out-of-line
     85     int     base;
     86     int     map_offset;
     87     int     pid;
     88 
     89 #ifdef __cplusplus
     90     static const int sNumInts = 8;
     91     static const int sNumFds = 1;
     92     static const int sMagic = 'gmsm';
     93 
     94     private_handle_t(int fd, int size, int flags) :
     95         fd(fd), magic(sMagic), flags(flags), size(size), offset(0),
     96         base(0), pid(getpid())
     97     {
     98         version = sizeof(native_handle);
     99         numInts = sNumInts;
    100         numFds = sNumFds;
    101     }
    102     ~private_handle_t() {
    103         magic = 0;
    104     }
    105 
    106     static int validate(const native_handle* h) {
    107         const private_handle_t* hnd = (const private_handle_t*)h;
    108         if (!h || h->version != sizeof(native_handle) ||
    109                 h->numInts != sNumInts || h->numFds != sNumFds ||
    110                 hnd->magic != sMagic)
    111         {
    112             LOGE("invalid gralloc handle (at %p)", h);
    113             return -EINVAL;
    114         }
    115         return 0;
    116     }
    117 #endif
    118 };
    119 
    120 #endif /* GRALLOC_PRIV_H_ */
    121