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, 19 insertions, 0 deletions

diff --git a/intern/cycles/device/CMakeLists.txt b/intern/cycles/device/CMakeLists.txt
index 6205775260a..6418801c572 100644
--- a/intern/cycles/device/CMakeLists.txt
+++ b/intern/cycles/device/CMakeLists.txt
@@ -82,6 +82,15 @@ set(SRC_HIP
   hip/util.h
 )
 
+set(SRC_ONEAPI
+  oneapi/device_impl.cpp
+  oneapi/device_impl.h
+  oneapi/device.cpp
+  oneapi/device.h
+  oneapi/queue.cpp
+  oneapi/queue.h
+)
+
 set(SRC_DUMMY
   dummy/device.cpp
   dummy/device.h
@@ -134,6 +143,7 @@ set(SRC
   ${SRC_DUMMY}
   ${SRC_MULTI}
   ${SRC_OPTIX}
+  ${SRC_ONEAPI}
   ${SRC_HEADERS}
 )
 
@@ -181,6 +191,9 @@ if(WITH_CYCLES_DEVICE_METAL)
     ${SRC_METAL}
   )
 endif()
+if (WITH_CYCLES_DEVICE_ONEAPI)
+  add_definitions(-DWITH_ONEAPI)
+endif()
 
 if(WITH_OPENIMAGEDENOISE)
   list(APPEND LIB
@@ -193,6 +206,11 @@ include_directories(SYSTEM ${INC_SYS})
 
 cycles_add_library(cycles_device "${LIB}" ${SRC})
 
+if(WITH_CYCLES_DEVICE_ONEAPI)
+  # Need to have proper rebuilding in case of changes in cycles_kernel_oneapi due external project behaviour
+  add_dependencies(cycles_device cycles_kernel_oneapi)
+endif()
+
 source_group("cpu" FILES ${SRC_CPU})
 source_group("cuda" FILES ${SRC_CUDA})
 source_group("dummy" FILES ${SRC_DUMMY})
@@ -200,4 +218,5 @@ source_group("hip" FILES ${SRC_HIP})
 source_group("multi" FILES ${SRC_MULTI})
 source_group("metal" FILES ${SRC_METAL})
 source_group("optix" FILES ${SRC_OPTIX})
+source_group("oneapi" FILES ${SRC_ONEAPI})
 source_group("common" FILES ${SRC_BASE} ${SRC_HEADERS})