OPenCL方面，rk3588上使用clImportMemoryARM()崩溃

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在RK3588上使用clImportMemoryARM()导入AHardwareBuffer时崩溃，可能由以下原因及解决方案导致：

1. 检查AHardwareBuffer分配参数

• 格式兼容性：确保AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM被GPU支持。部分设备可能要求特定格式（如AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM）。


• 使用标志（Usage Flags）：添加AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER以确保OpenCL可访问：
  

   .usage = AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN |
  
            AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
  
            AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |
  
            AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER



• 步长（Stride）：避免硬编码stride=0，分配后查询实际步长：
  

   AHardwareBuffer_describe(hardwareBuffer, &bufferDesc);
  
   int stride = bufferDesc.stride;

2. 验证clImportMemoryARM参数

• 上下文（Context）：确保context由兼容设备（如RK3588的Mali GPU）创建。


• 标志（Flags）：使用CL_IMPORT_MEMORY_WHOLE_ALLOCATION_ARM：
  

   cl_mem cl_buffer = clImportMemoryARM(context, CL_MEM_READ_WRITE,
  
                                       CL_IMPORT_MEMORY_WHOLE_ALLOCATION_ARM,
  
                                       hardwareBuffer, &error);



• 扩展支持：确认设备支持CL_ARM_import_memory_ahardwarebuffer扩展：
  

   cl_device_id device;
  
   clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL);
  
   size_t extensionSize;
  
   clGetDeviceInfo(device, CL_DEVICE_EXTENSIONS, 0, NULL, &extensionSize);
  
   char* extensions = (char*)malloc(extensionSize);
  
   clGetDeviceInfo(device, CL_DEVICE_EXTENSIONS, extensionSize, extensions, NULL);
  
   assert(strstr(extensions, "CL_ARM_import_memory_ahardwarebuffer") != NULL);

3. 驱动和兼容性

• 更新驱动：确保RK3588的OpenCL驱动为最新版本，修复潜在Bug。


• 内存对齐：确保宽度/高度是GPU要求的倍数（如16的倍数），例如256x256通常安全。

4. 错误处理与调试

• 检查返回值：验证每个API调用是否成功：
  

   int result = AHardwareBuffer_allocate(&bufferDesc, &hardwareBuffer);
  
   if (result != 0 || hardwareBuffer == NULL) {
  
       LOGE("AHardwareBuffer_allocate failed: %d", result);
  
   }



• 检查OpenCL错误码：
  

   cl_int error;
  
   cl_mem cl_buffer = clImportMemoryARM(...);
  
   if (error != CL_SUCCESS) {
  
       LOGE("clImportMemoryARM failed: %d", error);
  
   }

5. 替代方案

如仍崩溃，尝试其他内存分配方式：

• 使用clCreateBuffer或clCreateImage：分配OpenCL原生内存。


• 通过ION/DMA-BUF共享内存：部分平台需通过clImportMemory导入DMA-BUF句柄。

示例修正代码

AHardwareBuffer_Desc bufferDesc = {

    .width = 256,

    .height = 256,

    .layers = 1,

    .format = AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM,

    .usage = AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN |

             AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |

             AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |

             AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER,

    .stride = 0  // Let system calculate

};



AHardwareBuffer* hardwareBuffer = nullptr;

int result = AHardwareBuffer_allocate(&bufferDesc, &hardwareBuffer);

if (result != 0 || !hardwareBuffer) {

    LOGE("Failed to allocate AHardwareBuffer: %d", result);

    return;

}



// 获取实际stride（可选）

AHardwareBuffer_describe(hardwareBuffer, &bufferDesc);

LOGD("Allocated stride: %d", bufferDesc.stride);



// 导入到OpenCL

cl_int error;

cl_mem cl_buffer = clImportMemoryARM(

    context, 

    CL_MEM_READ_WRITE,

    CL_IMPORT_MEMORY_WHOLE_ALLOCATION_ARM,

    hardwareBuffer,

    &error

);



if (error != CL_SUCCESS) {

    LOGE("clImportMemoryARM error: %d", error);

    AHardwareBuffer_release(hardwareBuffer);

    return;

}

通过以上步骤，可系统性排查崩溃原因，确保参数兼容性并正确使用OpenCL扩展。若问题依旧，建议联系Rockchip或Mali GPU支持团队获取设备特定指导。