CUDA devices corresponding to a D3D11 device

Gets the CUDA device corresponding to a display adapter.

Parameters

pCudaDevice

- Returned CUDA device corresponding to pAdapter

pAdapter

- Adapter to query for CUDA device

Returns

CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_NO_DEVICE, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_NOT_FOUND, CUDA_ERROR_UNKNOWN

Description

Returns in *pCudaDevice the CUDA-compatible device corresponding to the adapter pAdapter obtained from IDXGIFactory::EnumAdapters.

If no device on pAdapter is CUDA-compatible the call will return CUDA_ERROR_NO_DEVICE.

See also:

cuD3D11GetDevices, cudaD3D11GetDevice

Gets the CUDA devices corresponding to a Direct3D 11 device.

Parameters

pCudaDeviceCount

- Returned number of CUDA devices corresponding to pD3D11Device

pCudaDevices

- Returned CUDA devices corresponding to pD3D11Device

cudaDeviceCount

- The size of the output device array pCudaDevices

pD3D11Device

- Direct3D 11 device to query for CUDA devices

deviceList

- The set of devices to return. This set may be CU_D3D11_DEVICE_LIST_ALL for all devices, CU_D3D11_DEVICE_LIST_CURRENT_FRAME for the devices used to render the current frame (in SLI), or CU_D3D11_DEVICE_LIST_NEXT_FRAME for the devices used to render the next frame (in SLI).

Returns

CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_NO_DEVICE, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_NOT_FOUND, CUDA_ERROR_UNKNOWN

Description

Returns in *pCudaDeviceCount the number of CUDA-compatible device corresponding to the Direct3D 11 device pD3D11Device. Also returns in *pCudaDevices at most cudaDeviceCount of the CUDA-compatible devices corresponding to the Direct3D 11 device pD3D11Device.

If any of the GPUs being used to render pDevice are not CUDA capable then the call will return CUDA_ERROR_NO_DEVICE.

See also:

cuD3D11GetDevice, cudaD3D11GetDevices

Register a Direct3D 11 resource for access by CUDA.

Parameters

pCudaResource

- Returned graphics resource handle

pD3DResource

- Direct3D resource to register

Flags

- Parameters for resource registration

Returns

CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_INVALID_HANDLE, CUDA_ERROR_OUT_OF_MEMORY, CUDA_ERROR_UNKNOWN

Description

Registers the Direct3D 11 resource pD3DResource for access by CUDA and returns a CUDA handle to pD3Dresource in pCudaResource. The handle returned in pCudaResource may be used to map and unmap this resource until it is unregistered. On success this call will increase the internal reference count on pD3DResource. This reference count will be decremented when this resource is unregistered through cuGraphicsUnregisterResource().

This call is potentially high-overhead and should not be called every frame in interactive applications.

The type of pD3DResource must be one of the following.

• ID3D11Buffer: may be accessed through a device pointer.

• ID3D11Texture1D: individual subresources of the texture may be accessed via arrays

• ID3D11Texture2D: individual subresources of the texture may be accessed via arrays

• ID3D11Texture3D: individual subresources of the texture may be accessed via arrays

The Flags argument may be used to specify additional parameters at register time. The valid values for this parameter are

• CU_GRAPHICS_REGISTER_FLAGS_NONE: Specifies no hints about how this resource will be used.

• CU_GRAPHICS_REGISTER_FLAGS_SURFACE_LDST: Specifies that CUDA will bind this resource to a surface reference.

• CU_GRAPHICS_REGISTER_FLAGS_TEXTURE_GATHER: Specifies that CUDA will perform texture gather operations on this resource.

Not all Direct3D resources of the above types may be used for interoperability with CUDA. The following are some limitations.

• The primary rendertarget may not be registered with CUDA.

• Textures which are not of a format which is 1, 2, or 4 channels of 8, 16, or 32-bit integer or floating-point data cannot be shared.

• Surfaces of depth or stencil formats cannot be shared.

A complete list of supported DXGI formats is as follows. For compactness the notation A_{B,C,D} represents A_B, A_C, and A_D.

• DXGI_FORMAT_A8_UNORM

• DXGI_FORMAT_B8G8R8A8_UNORM

• DXGI_FORMAT_B8G8R8X8_UNORM

• DXGI_FORMAT_R16_FLOAT

• DXGI_FORMAT_R16G16B16A16_{FLOAT,SINT,SNORM,UINT,UNORM}

• DXGI_FORMAT_R16G16_{FLOAT,SINT,SNORM,UINT,UNORM}

• DXGI_FORMAT_R16_{SINT,SNORM,UINT,UNORM}

• DXGI_FORMAT_R32_FLOAT

• DXGI_FORMAT_R32G32B32A32_{FLOAT,SINT,UINT}

• DXGI_FORMAT_R32G32_{FLOAT,SINT,UINT}

• DXGI_FORMAT_R32_{SINT,UINT}

• DXGI_FORMAT_R8G8B8A8_{SINT,SNORM,UINT,UNORM,UNORM_SRGB}

• DXGI_FORMAT_R8G8_{SINT,SNORM,UINT,UNORM}

• DXGI_FORMAT_R8_{SINT,SNORM,UINT,UNORM}

If pD3DResource is of incorrect type or is already registered then CUDA_ERROR_INVALID_HANDLE is returned. If pD3DResource cannot be registered then CUDA_ERROR_UNKNOWN is returned. If Flags is not one of the above specified value then CUDA_ERROR_INVALID_VALUE is returned.

See also:

cuGraphicsUnregisterResource, cuGraphicsMapResources, cuGraphicsSubResourceGetMappedArray, cuGraphicsResourceGetMappedPointer, cudaGraphicsD3D11RegisterResource