Felix Kuehling
40c46cc6cb
So far we have assumed that userptrs are always memory outside reserved SVM apertures that are mapped into the SVM aperture for GPU access. With an unreserved SVM aperture that covers the entire virtual address range, this distinction will no longer be true. Userptrs will generally be inside the unreserved SVM aperture. Take that into consideration when registering, mapping and unmapping virtual addresses. We now need a retry logic when looking up buffers from addresses. If it is not found by its GPU address, try it as a userptr. We also need to consider the new possibility that a userptr is registered at the same address for CPU and GPU access. So a buffer found by its GPU address may also turn out to be a userptr. In that case use a stricter lookup using the userptr and size (if the size is known), to identify the correct one of multiple overlapping objects. Change-Id: Ia43633aaa40f9fd2a74918ae969a631d2ff68419 Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
ROCt Library
This repository includes the user-mode API interfaces used to interact with the ROCk driver. Currently supported agents include only the AMD/ATI Fiji family of discrete GPUs.
Starting at 1.7 release, ROCt uses drm render device. This requires the user to belong to video group. Add the user account to video group with "sudo usermod -a -G video username" command if the user if not part of video group yet.
ROCk Driver
The ROCt library is not a standalone product and requires that you have the correct ROCk driver set installed. We recommend reading the full compatibility and installation details which are available in the ROCk github:
https://github.com/RadeonOpenCompute/ROCK-Radeon-Open-Compute-Kernel-Driver
Building the Thunk
A simple cmake-based system is available for building thunk. To build the thunk from the the ROCT-Thunk-Interface directory, execute:
mkdir -p build
cd build
cmake ..
make
If the hsakmt-roct and hsakmt-roct-dev packages are desired:
mkdir -p build
cd build
cmake ..
make package
make package-dev
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