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      1 /*
      2  * Copyright (C) 2008, The Android Open Source Project
      3  * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 #include <unistd.h>
     19 #include <fcntl.h>
     20 
     21 #include <sys/mman.h>
     22 #include <sys/stat.h>
     23 #include <sys/types.h>
     24 #include <sys/ioctl.h>
     25 #include <cutils/properties.h>
     26 
     27 #include "gr.h"
     28 #include "gpu.h"
     29 #include "memalloc.h"
     30 #include "alloc_controller.h"
     31 
     32 using namespace gralloc;
     33 
     34 int fb_device_open(const hw_module_t* module, const char* name,
     35                    hw_device_t** device);
     36 
     37 static int gralloc_device_open(const hw_module_t* module, const char* name,
     38                                hw_device_t** device);
     39 
     40 extern int gralloc_lock(gralloc_module_t const* module,
     41                         buffer_handle_t handle, int usage,
     42                         int l, int t, int w, int h,
     43                         void** vaddr);
     44 
     45 extern int gralloc_lock_ycbcr(gralloc_module_t const* module,
     46                         buffer_handle_t handle, int usage,
     47                         int l, int t, int w, int h,
     48                         struct android_ycbcr *ycbcr);
     49 
     50 extern int gralloc_unlock(gralloc_module_t const* module,
     51                           buffer_handle_t handle);
     52 
     53 extern int gralloc_register_buffer(gralloc_module_t const* module,
     54                                    buffer_handle_t handle);
     55 
     56 extern int gralloc_unregister_buffer(gralloc_module_t const* module,
     57                                      buffer_handle_t handle);
     58 
     59 extern int gralloc_perform(struct gralloc_module_t const* module,
     60                            int operation, ... );
     61 
     62 // HAL module methods
     63 static struct hw_module_methods_t gralloc_module_methods = {
     64     .open = gralloc_device_open
     65 };
     66 
     67 // HAL module initialize
     68 struct private_module_t HAL_MODULE_INFO_SYM = {
     69     .base = {
     70         .common = {
     71             .tag = HARDWARE_MODULE_TAG,
     72             .module_api_version = GRALLOC_MODULE_API_VERSION_0_2,
     73             .hal_api_version = 0,
     74             .id = GRALLOC_HARDWARE_MODULE_ID,
     75             .name = "Graphics Memory Allocator Module",
     76             .author = "The Android Open Source Project",
     77             .methods = &gralloc_module_methods,
     78             .dso = 0,
     79         },
     80         .registerBuffer = gralloc_register_buffer,
     81         .unregisterBuffer = gralloc_unregister_buffer,
     82         .lock = gralloc_lock,
     83         .unlock = gralloc_unlock,
     84         .perform = gralloc_perform,
     85         .lock_ycbcr = gralloc_lock_ycbcr,
     86     },
     87     .framebuffer = 0,
     88     .fbFormat = 0,
     89     .flags = 0,
     90     .numBuffers = 0,
     91     .bufferMask = 0,
     92     .lock = PTHREAD_MUTEX_INITIALIZER,
     93     .currentBuffer = 0,
     94 };
     95 
     96 // Open Gralloc device
     97 int gralloc_device_open(const hw_module_t* module, const char* name,
     98                         hw_device_t** device)
     99 {
    100     int status = -EINVAL;
    101     if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) {
    102         const private_module_t* m = reinterpret_cast<const private_module_t*>(
    103             module);
    104         gpu_context_t *dev;
    105         IAllocController* alloc_ctrl = IAllocController::getInstance();
    106         dev = new gpu_context_t(m, alloc_ctrl);
    107         *device = &dev->common;
    108         status = 0;
    109     } else {
    110         status = fb_device_open(module, name, device);
    111     }
    112     return status;
    113 }
    114