Cycles: Add support for rendering on Intel GPUs using oneAPI

This patch adds a new Cycles device with similar functionality to the
existing GPU devices.  Kernel compilation and runtime interaction happen
via oneAPI DPC++ compiler and SYCL API.

This implementation is primarly focusing on Intel® Arc™ GPUs and other
future Intel GPUs.  The first supported drivers are 101.1660 on Windows
and 22.10.22597 on Linux.

The necessary tools for compilation are:
- A SYCL compiler such as oneAPI DPC++ compiler or
  https://github.com/intel/llvm
- Intel® oneAPI Level Zero which is used for low level device queries:
  https://github.com/oneapi-src/level-zero
- To optionally generate prebuilt graphics binaries: Intel® Graphics
  Compiler All are included in Linux precompiled libraries on svn:
  https://svn.blender.org/svnroot/bf-blender/trunk/lib The same goes for
  Windows precompiled binaries but for the graphics compiler, available
  as "Intel® Graphics Offline Compiler for OpenCL™ Code" from
  https://www.intel.com/content/www/us/en/developer/articles/tool/oneapi-standalone-components.html,
  for which path can be set as OCLOC_INSTALL_DIR.

Being based on the open SYCL standard, this implementation could also be
extended to run on other compatible non-Intel hardware in the future.

Reviewed By: sergey, brecht

Differential Revision: https://developer.blender.org/D15254

Co-authored-by: Nikita Sirgienko <nikita.sirgienko@intel.com>
Co-authored-by: Stefan Werner <stefan.werner@intel.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/build_files/cmake/config/blender_release.cmake b/build_files/cmake/config/blender_release.cmake
index 8ece5eec39e..42759fec7cc 100644
--- a/build_files/cmake/config/blender_release.cmake
+++ b/build_files/cmake/config/blender_release.cmake
@@ -70,7 +70,8 @@ if(NOT WIN32)
   set(WITH_JACK                ON  CACHE BOOL "" FORCE)
 endif()
 if(WIN32)
-  set(WITH_WASAPI              ON  CACHE BOOL "" FORCE)
+  set(WITH_WASAPI               ON  CACHE BOOL "" FORCE)
+  set(WITH_CYCLES_DEVICE_ONEAPI ON  CACHE BOOL "" FORCE)
 endif()
 if(UNIX AND NOT APPLE)
   set(WITH_DOC_MANPAGE         ON  CACHE BOOL "" FORCE)
@@ -78,6 +79,11 @@ if(UNIX AND NOT APPLE)
   set(WITH_PULSEAUDIO          ON  CACHE BOOL "" FORCE)
   set(WITH_X11_XINPUT          ON  CACHE BOOL "" FORCE)
   set(WITH_X11_XF86VMODE       ON  CACHE BOOL "" FORCE)
+
+  # Disable oneAPI on Linux for the time being.
+  # The AoT compilation takes too long to be used officially in the buildbot CI/CD and the JIT
+  # compilation has ABI compatibility issues when running builds made on centOS on Ubuntu.
+  set(WITH_CYCLES_DEVICE_ONEAPI OFF  CACHE BOOL "" FORCE)
 endif()
 if(NOT APPLE)
   set(WITH_XR_OPENXR              ON  CACHE BOOL "" FORCE)
@@ -86,4 +92,7 @@ if(NOT APPLE)
   set(WITH_CYCLES_CUDA_BINARIES   ON  CACHE BOOL "" FORCE)
   set(WITH_CYCLES_CUBIN_COMPILER  OFF CACHE BOOL "" FORCE)
   set(WITH_CYCLES_HIP_BINARIES    ON  CACHE BOOL "" FORCE)
+
+  # Disable AoT kernels compilations until buildbot can deliver them in a reasonabel time.
+  set(WITH_CYCLES_ONEAPI_BINARIES OFF CACHE BOOL "" FORCE)
 endif()