| .. SPDX-License-Identifier: GPL-2.0-only |
| |
| ===================================================== |
| Intel(R) Gaussian & Neural Accelerator (Intel(R) GNA) |
| ===================================================== |
| |
| Acronyms |
| -------- |
| GNA - Gaussian & Neural Accelerator |
| GMM - Gaussian Mixer Model |
| CNN - Convolutional Neural Network |
| RNN - Recurrent Neural Networks |
| DNN - Deep Neural Networks |
| |
| Introduction |
| ------------ |
| The Intel(R) GNA is an internal PCI fixed device available on several Intel platforms/SoCs. |
| Feature set depends on the Intel chipset SKU. |
| |
| Intel(R) GNA provides hardware accelerated computation for GMMs and Neural Networks. |
| It supports several layer types: affine, recurrent, and convolutional among others. |
| Hardware also provides helper layer types for copying and transposing matrices. |
| |
| Linux Driver |
| ------------ |
| The driver also registers a character device to expose file operations via dev node. |
| |
| The driver probes/removes a PCI device, implements file operations, handles runtime |
| power management, and interacts with hardware through MMIO registers. |
| |
| Multiple processes can independently file many requests to the driver. These requests are |
| processed in a FIFO manner. The hardware can process one request at a time by using a FIFO |
| queue. |
| |
| IOCTL |
| ----- |
| Intel(R) GNA driver controls the device through IOCTL interfaces. |
| Following IOCTL commands are supported: |
| |
| GNA_IOCTL_PARAM_GET gets driver and device capabilities. |
| |
| GNA_IOCTL_MEMORY_MAP locks user pages and GNA MMU setups for DMA transfer. |
| |
| GNA_IOCTL_MEMORY_UNMAP unlocks user pages and releases GNA MMU structures. |
| |
| GNA_IOCTL_COMPUTE submits a request to the device queue. |
| |
| GNA_IOCTL_WAIT blocks and waits on the submitted request. |
