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>

10 files changed, 505 insertions, 1 deletions

diff --git a/build_files/build_environment/cmake/download.cmake b/build_files/build_environment/cmake/download.cmake
index 81e7f7ab3fe..8b210992ada 100644
--- a/build_files/build_environment/cmake/download.cmake
+++ b/build_files/build_environment/cmake/download.cmake
@@ -101,3 +101,19 @@ download_source(ROBINMAP)
 download_source(IMATH)
 download_source(PYSTRING)
 download_source(LEVEL_ZERO)
+download_source(DPCPP)
+download_source(VCINTRINSICS)
+download_source(OPENCLHEADERS)
+download_source(ICDLOADER)
+download_source(MP11)
+download_source(SPIRV_HEADERS)
+download_source(IGC)
+download_source(IGC_LLVM)
+download_source(IGC_OPENCL_CLANG)
+download_source(IGC_VCINTRINSICS)
+download_source(IGC_SPIRV_HEADERS)
+download_source(IGC_SPIRV_TOOLS)
+download_source(IGC_SPIRV_TRANSLATOR)
+download_source(GMMLIB)
+download_source(OCLOC)
+
diff --git a/build_files/build_environment/cmake/dpcpp.cmake b/build_files/build_environment/cmake/dpcpp.cmake
new file mode 100644
index 00000000000..563bc7aeff4
--- /dev/null
+++ b/build_files/build_environment/cmake/dpcpp.cmake
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+
+if(WIN32)
+  set(LLVM_GENERATOR "Ninja")
+else()
+  set(LLVM_GENERATOR "Unix Makefiles")
+endif()
+
+set(DPCPP_CONFIGURE_ARGS
+  # When external deps dpcpp needs are not found it will automatically
+  # download the during the configure stage using FetchContent. Given
+  # we need to keep an archive of all source used during build for compliance
+  # reasons it CANNOT download anything we do not know about. By setting
+  # this property to ON, all downloads are disabled, and we will have to
+  # provide the missing deps some other way, a build error beats a compliance
+  # violation
+  --cmake-opt FETCHCONTENT_FULLY_DISCONNECTED=ON
+)
+set(DPCPP_SOURCE_ROOT ${BUILD_DIR}/dpcpp/src/external_dpcpp/)
+set(DPCPP_EXTRA_ARGS
+  # When external deps dpcpp needs are not found it will automatically
+  # download the during the configure stage using FetchContent. Given
+  # we need to keep an archive of all source used during build for compliance
+  # reasons it CANNOT download anything we do not know about. By setting
+  # this property to ON, all downloads are disabled, and we will have to
+  # provide the missing deps some other way, a build or configure error
+  # beats a compliance violation
+  -DFETCHCONTENT_FULLY_DISCONNECTED=ON
+  -DLLVMGenXIntrinsics_SOURCE_DIR=${BUILD_DIR}/vcintrinsics/src/external_vcintrinsics/
+  -DOpenCL_HEADERS=file://${PACKAGE_DIR}/${OPENCLHEADERS_FILE}
+  -DOpenCL_LIBRARY_SRC=file://${PACKAGE_DIR}/${ICDLOADER_FILE}
+  -DBOOST_MP11_SOURCE_DIR=${BUILD_DIR}/mp11/src/external_mp11/
+  -DLEVEL_ZERO_LIBRARY=${LIBDIR}/level-zero/lib/${LIBPREFIX}ze_loader${SHAREDLIBEXT}
+  -DLEVEL_ZERO_INCLUDE_DIR=${LIBDIR}/level-zero/include
+  -DLLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR=${BUILD_DIR}/spirvheaders/src/external_spirvheaders/
+  # Below here is copied from an invocation of buildbot/config.py
+  -DLLVM_ENABLE_ASSERTIONS=ON
+  -DLLVM_TARGETS_TO_BUILD=X86
+  -DLLVM_EXTERNAL_PROJECTS=sycl^^llvm-spirv^^opencl^^libdevice^^xpti^^xptifw
+  -DLLVM_EXTERNAL_SYCL_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/sycl
+  -DLLVM_EXTERNAL_LLVM_SPIRV_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/llvm-spirv
+  -DLLVM_EXTERNAL_XPTI_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/xpti
+  -DXPTI_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/xpti
+  -DLLVM_EXTERNAL_XPTIFW_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/xptifw
+  -DLLVM_EXTERNAL_LIBDEVICE_SOURCE_DIR=${DPCPP_SOURCE_ROOT}/libdevice
+  -DLLVM_ENABLE_PROJECTS=clang^^sycl^^llvm-spirv^^opencl^^libdevice^^xpti^^xptifw
+  -DLIBCLC_TARGETS_TO_BUILD=
+  -DLIBCLC_GENERATE_REMANGLED_VARIANTS=OFF
+  -DSYCL_BUILD_PI_HIP_PLATFORM=AMD
+  -DLLVM_BUILD_TOOLS=ON
+  -DSYCL_ENABLE_WERROR=OFF
+  -DSYCL_INCLUDE_TESTS=ON
+  -DLLVM_ENABLE_DOXYGEN=OFF
+  -DLLVM_ENABLE_SPHINX=OFF
+  -DBUILD_SHARED_LIBS=OFF
+  -DSYCL_ENABLE_XPTI_TRACING=ON
+  -DLLVM_ENABLE_LLD=OFF
+  -DXPTI_ENABLE_WERROR=OFF
+  -DSYCL_CLANG_EXTRA_FLAGS=
+  -DSYCL_ENABLE_PLUGINS=level_zero
+  -DCMAKE_INSTALL_RPATH=\$ORIGIN
+  -DPython3_ROOT_DIR=${LIBDIR}/python/
+  -DPython3_EXECUTABLE=${PYTHON_BINARY}
+  -DPYTHON_EXECUTABLE=${PYTHON_BINARY}
+)
+
+if(WIN32)
+   list(APPEND DPCPP_EXTRA_ARGS -DPython3_FIND_REGISTRY=NEVER)
+endif()
+
+ExternalProject_Add(external_dpcpp
+  URL file://${PACKAGE_DIR}/${DPCPP_FILE}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH ${DPCPP_HASH_TYPE}=${DPCPP_HASH}
+  PREFIX ${BUILD_DIR}/dpcpp
+  CMAKE_GENERATOR ${LLVM_GENERATOR}
+  SOURCE_SUBDIR llvm
+  LIST_SEPARATOR ^^
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/dpcpp ${DEFAULT_CMAKE_FLAGS} ${DPCPP_EXTRA_ARGS}
+  #CONFIGURE_COMMAND ${PYTHON_BINARY} ${BUILD_DIR}/dpcpp/src/external_dpcpp/buildbot/configure.py ${DPCPP_CONFIGURE_ARGS}
+  #BUILD_COMMAND echo "." #${PYTHON_BINARY} ${BUILD_DIR}/dpcpp/src/external_dpcpp/buildbot/compile.py
+  INSTALL_COMMAND ${CMAKE_COMMAND} --build . -- deploy-sycl-toolchain
+  PATCH_COMMAND ${PATCH_CMD} -p 1 -d ${BUILD_DIR}/dpcpp/src/external_dpcpp < ${PATCH_DIR}/dpcpp.diff
+  INSTALL_DIR ${LIBDIR}/dpcpp
+)
+
+add_dependencies(
+  external_dpcpp
+  external_python
+  external_python_site_packages
+  external_vcintrinsics
+  external_openclheaders
+  external_icdloader
+  external_mp11
+  external_level-zero
+  external_spirvheaders
+)
+
+if(BUILD_MODE STREQUAL Release AND WIN32)
+  ExternalProject_Add_Step(external_dpcpp after_install
+      COMMAND ${CMAKE_COMMAND} -E rm -f ${LIBDIR}/dpcpp/bin/clang-cl.exe
+      COMMAND ${CMAKE_COMMAND} -E rm -f ${LIBDIR}/dpcpp/bin/clang-cpp.exe
+      COMMAND ${CMAKE_COMMAND} -E rm -f ${LIBDIR}/dpcpp/bin/clang.exe
+      COMMAND ${CMAKE_COMMAND} -E copy_directory ${LIBDIR}/dpcpp ${HARVEST_TARGET}/dpcpp
+  )
+endif()
diff --git a/build_files/build_environment/cmake/dpcpp_deps.cmake b/build_files/build_environment/cmake/dpcpp_deps.cmake
new file mode 100644
index 00000000000..17cb9de3bf7
--- /dev/null
+++ b/build_files/build_environment/cmake/dpcpp_deps.cmake
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# These are build time requirements for dpcpp
+# We only have to unpack these dpcpp will build
+# them.
+
+ExternalProject_Add(external_vcintrinsics
+  URL file://${PACKAGE_DIR}/${VCINTRINSICS_FILE}
+  URL_HASH ${VCINTRINSICS_HASH_TYPE}=${VCINTRINSICS_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/vcintrinsics
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+)
+
+# opencl headers do not have to be unpacked, dpcpp will do it
+# but it wouldn't hurt to do it anyway as an opertunity to validate
+# the hash is correct.
+ExternalProject_Add(external_openclheaders
+  URL file://${PACKAGE_DIR}/${OPENCLHEADERS_FILE}
+  URL_HASH ${OPENCLHEADERS_HASH_TYPE}=${OPENCLHEADERS_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/openclheaders
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+)
+
+# icdloader does not have to be unpacked, dpcpp will do it
+# but it wouldn't hurt to do it anyway as an opertunity to validate
+# the hash is correct.
+ExternalProject_Add(external_icdloader
+  URL file://${PACKAGE_DIR}/${ICDLOADER_FILE}
+  URL_HASH ${ICDLOADER_HASH_TYPE}=${ICDLOADER_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/icdloader
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+)
+
+ExternalProject_Add(external_mp11
+  URL file://${PACKAGE_DIR}/${MP11_FILE}
+  URL_HASH ${MP11_HASH_TYPE}=${MP11_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/mp11
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+)
+
+ExternalProject_Add(external_spirvheaders
+  URL file://${PACKAGE_DIR}/${SPIRV_HEADERS_FILE}
+  URL_HASH ${SPIRV_HEADERS_HASH_TYPE}=${SPIRV_HEADERS_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/spirvheaders
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+)
+
diff --git a/build_files/build_environment/cmake/gmmlib.cmake b/build_files/build_environment/cmake/gmmlib.cmake
new file mode 100644
index 00000000000..d3ddfd39ac6
--- /dev/null
+++ b/build_files/build_environment/cmake/gmmlib.cmake
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set(GMMLIB_EXTRA_ARGS
+)
+
+ExternalProject_Add(external_gmmlib
+  URL file://${PACKAGE_DIR}/${GMMLIB_FILE}
+  URL_HASH ${GMMLIB_HASH_TYPE}=${GMMLIB_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/gmmlib
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/gmmlib ${DEFAULT_CMAKE_FLAGS} ${GMMLIB_EXTRA_ARGS}
+  INSTALL_DIR ${LIBDIR}/gmmlib
+)
+
diff --git a/build_files/build_environment/cmake/harvest.cmake b/build_files/build_environment/cmake/harvest.cmake
index aeaa6fbd2b5..2865a5304d7 100644
--- a/build_files/build_environment/cmake/harvest.cmake
+++ b/build_files/build_environment/cmake/harvest.cmake
@@ -192,6 +192,10 @@ harvest(zstd/lib zstd/lib "*.a")
 if(UNIX AND NOT APPLE)
   harvest(libglu/lib mesa/lib "*.so*")
   harvest(mesa/lib64 mesa/lib "*.so*")
-endif()
+
+  harvest(dpcpp dpcpp "*")
+  harvest(igc dpcpp/lib/igc "*")
+  harvest(ocloc dpcpp/lib/ocloc "*")
+ endif()
 
 endif()
diff --git a/build_files/build_environment/cmake/igc.cmake b/build_files/build_environment/cmake/igc.cmake
new file mode 100644
index 00000000000..64f30064a3a
--- /dev/null
+++ b/build_files/build_environment/cmake/igc.cmake
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+unpack_only(igc_vcintrinsics)
+unpack_only(igc_spirv_headers)
+unpack_only(igc_spirv_tools)
+
+#
+# igc_opencl_clang contains patches that need to be applied
+# to external_igc_llvm and igc_spirv_translator, we unpack
+# igc_opencl_clang first, then have the patch stages of 
+# external_igc_llvm and igc_spirv_translator apply them.
+#
+
+ExternalProject_Add(external_igc_opencl_clang
+  URL file://${PACKAGE_DIR}/${IGC_OPENCL_CLANG_FILE}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH ${IGC_OPENCL_CLANG_HASH_TYPE}=${IGC_OPENCL_CLANG_HASH}
+  PREFIX ${BUILD_DIR}/igc_opencl_clang
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+  PATCH_COMMAND ${PATCH_CMD} -p 1 -d ${BUILD_DIR}/igc_opencl_clang/src/external_igc_opencl_clang/ < ${PATCH_DIR}/igc_opencl_clang.diff
+)
+
+set(IGC_OPENCL_CLANG_PATCH_DIR ${BUILD_DIR}/igc_opencl_clang/src/external_igc_opencl_clang/patches)
+set(IGC_LLVM_SOURCE_DIR ${BUILD_DIR}/igc_llvm/src/external_igc_llvm)
+set(IGC_SPIRV_TRANSLATOR_SOURCE_DIR ${BUILD_DIR}/igc_spirv_translator/src/external_igc_spirv_translator)
+
+ExternalProject_Add(external_igc_llvm
+  URL file://${PACKAGE_DIR}/${IGC_LLVM_FILE}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH ${IGC_LLVM_HASH_TYPE}=${IGC_LLVM_HASH}
+  PREFIX ${BUILD_DIR}/igc_llvm
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+  PATCH_COMMAND ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/clang/0001-OpenCL-3.0-support.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/clang/0002-Remove-__IMAGE_SUPPORT__-macro-for-SPIR.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/clang/0003-Avoid-calling-ParseCommandLineOptions-in-BackendUtil.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/clang/0004-OpenCL-support-cl_ext_float_atomics.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/clang/0005-OpenCL-Add-cl_khr_integer_dot_product.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/llvm/0001-Memory-leak-fix-for-Managed-Static-Mutex.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_LLVM_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/llvm/0002-Remove-repo-name-in-LLVM-IR.patch
+)
+add_dependencies(
+  external_igc_llvm
+  external_igc_opencl_clang
+)
+
+ExternalProject_Add(external_igc_spirv_translator
+  URL file://${PACKAGE_DIR}/${IGC_SPIRV_TRANSLATOR_FILE}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH ${IGC_SPIRV_TRANSLATOR_HASH_TYPE}=${IGC_SPIRV_TRANSLATOR_HASH}
+  PREFIX ${BUILD_DIR}/igc_spirv_translator
+  CONFIGURE_COMMAND echo .
+  BUILD_COMMAND echo .
+  INSTALL_COMMAND echo .
+  PATCH_COMMAND ${PATCH_CMD} -p 1 -d ${IGC_SPIRV_TRANSLATOR_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/spirv/0001-update-SPIR-V-headers-for-SPV_INTEL_split_barrier.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_SPIRV_TRANSLATOR_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/spirv/0002-Add-support-for-split-barriers-extension-SPV_INTEL_s.patch &&
+    ${PATCH_CMD} -p 1 -d ${IGC_SPIRV_TRANSLATOR_SOURCE_DIR} < ${IGC_OPENCL_CLANG_PATCH_DIR}/spirv/0003-Support-cl_bf16_conversions.patch
+)
+add_dependencies(
+  external_igc_spirv_translator
+  external_igc_opencl_clang
+)
+
+if(WIN32)
+  set(IGC_GENERATOR "Ninja")
+  set(IGC_TARGET Windows64)
+else()
+  set(IGC_GENERATOR "Unix Makefiles")
+  set(IGC_TARGET Linux64)
+endif()
+
+set(IGC_EXTRA_ARGS
+  -DIGC_OPTION__ARCHITECTURE_TARGET=${IGC_TARGET}
+  -DIGC_OPTION__ARCHITECTURE_HOST=${IGC_TARGET}
+)
+
+if(UNIX AND NOT APPLE)
+  list(APPEND IGC_EXTRA_ARGS
+       -DFLEX_EXECUTABLE=${LIBDIR}/flex/bin/flex
+       -DFLEX_INCLUDE_DIR=${LIBDIR}/flex/include
+  )
+endif()
+
+ExternalProject_Add(external_igc
+  URL file://${PACKAGE_DIR}/${IGC_FILE}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  URL_HASH ${IGC_HASH_TYPE}=${IGC_HASH}
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/igc ${DEFAULT_CMAKE_FLAGS} ${IGC_EXTRA_ARGS}
+
+  # IGC is pretty set in its way where sub projects ought to live, for some it offers
+  # hooks to supply alternatives folders, other are just hardocded with no way to configure
+  # we symlink everything here, since it's less work than trying to convince the cmake
+  # scripts to accept alternative locations.
+  #
+  PATCH_COMMAND ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_llvm/src/external_igc_llvm/ ${BUILD_DIR}/igc/src/llvm-project &&
+    ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_opencl_clang/src/external_igc_opencl_clang/ ${BUILD_DIR}/igc/src/llvm-project/llvm/projects/opencl-clang &&
+    ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_spirv_translator/src/external_igc_spirv_translator/ ${BUILD_DIR}/igc/src/llvm-project/llvm/projects/llvm-spirv &&
+    ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_spirv_tools/src/external_igc_spirv_tools/ ${BUILD_DIR}/igc/src/SPIRV-Tools &&
+    ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_spirv_headers/src/external_igc_spirv_headers/ ${BUILD_DIR}/igc/src/SPIRV-Headers &&
+    ${CMAKE_COMMAND} -E create_symlink ${BUILD_DIR}/igc_vcintrinsics/src/external_igc_vcintrinsics/ ${BUILD_DIR}/igc/src/vc-intrinsics
+  PREFIX ${BUILD_DIR}/igc
+  INSTALL_DIR ${LIBDIR}/igc
+  INSTALL_COMMAND ${CMAKE_COMMAND} --install . --strip
+  CMAKE_GENERATOR ${IGC_GENERATOR}
+)
+
+add_dependencies(
+  external_igc
+  external_igc_vcintrinsics
+  external_igc_llvm
+  external_igc_opencl_clang
+  external_igc_vcintrinsics
+  external_igc_spirv_headers
+  external_igc_spirv_tools
+  external_igc_spirv_translator
+)
+
+if(UNIX AND NOT APPLE)
+  add_dependencies(
+    external_igc
+    external_flex
+  )
+endif()
diff --git a/build_files/build_environment/cmake/macros.cmake b/build_files/build_environment/cmake/macros.cmake
new file mode 100644
index 00000000000..82fc151a038
--- /dev/null
+++ b/build_files/build_environment/cmake/macros.cmake
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# shorthand to only unpack a certain dependency
+macro(unpack_only name)
+  string(TOUPPER ${name} UPPER_NAME)
+  set(TARGET_FILE ${${UPPER_NAME}_FILE})
+  set(TARGET_HASH_TYPE ${${UPPER_NAME}_HASH_TYPE})
+  set(TARGET_HASH ${${UPPER_NAME}_HASH})
+  ExternalProject_Add(external_${name}
+    URL file://${PACKAGE_DIR}/${TARGET_FILE}
+    URL_HASH ${TARGET_HASH_TYPE}=${TARGET_HASH}
+    DOWNLOAD_DIR ${DOWNLOAD_DIR}
+    PREFIX ${BUILD_DIR}/${name}
+    CONFIGURE_COMMAND echo .
+    BUILD_COMMAND echo .
+    INSTALL_COMMAND echo .
+  )
+endmacro()
diff --git a/build_files/build_environment/cmake/ocloc.cmake b/build_files/build_environment/cmake/ocloc.cmake
new file mode 100644
index 00000000000..f686d2dd4fc
--- /dev/null
+++ b/build_files/build_environment/cmake/ocloc.cmake
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set(OCLOC_EXTRA_ARGS
+  -DNEO_SKIP_UNIT_TESTS=1
+  -DNEO_BUILD_WITH_OCL=0
+  -DBUILD_WITH_L0=0
+  -DIGC_DIR=${LIBDIR}/igc
+  -DGMM_DIR=${LIBDIR}/gmmlib
+)
+
+ExternalProject_Add(external_ocloc
+  URL file://${PACKAGE_DIR}/${OCLOC_FILE}
+  URL_HASH ${OCLOC_HASH_TYPE}=${OCLOC_HASH}
+  DOWNLOAD_DIR ${DOWNLOAD_DIR}
+  PREFIX ${BUILD_DIR}/ocloc
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/ocloc ${DEFAULT_CMAKE_FLAGS} ${OCLOC_EXTRA_ARGS}
+  INSTALL_DIR ${LIBDIR}/ocloc
+)
+
+add_dependencies(
+  external_ocloc
+  external_igc
+  external_gmmlib
+)
diff --git a/build_files/build_environment/cmake/options.cmake b/build_files/build_environment/cmake/options.cmake
index 7b9529068f4..9015ef9ac7c 100644
--- a/build_files/build_environment/cmake/options.cmake
+++ b/build_files/build_environment/cmake/options.cmake
@@ -38,6 +38,7 @@ message("BUILD_DIR = ${BUILD_DIR}")
 if(WIN32)
   set(PATCH_CMD ${DOWNLOAD_DIR}/mingw/mingw64/msys/1.0/bin/patch.exe)
   set(LIBEXT ".lib")
+  set(SHAREDLIBEXT ".lib")
   set(LIBPREFIX "")
 
   # For OIIO and OSL
@@ -96,6 +97,7 @@ if(WIN32)
 else()
   set(PATCH_CMD patch)
   set(LIBEXT ".a")
+  set(SHAREDLIBEXT ".so")
   set(LIBPREFIX "lib")
 
   if(APPLE)
diff --git a/build_files/build_environment/cmake/versions.cmake b/build_files/build_environment/cmake/versions.cmake
index c8699c3773c..1a4ad291581 100644
--- a/build_files/build_environment/cmake/versions.cmake
+++ b/build_files/build_environment/cmake/versions.cmake
@@ -502,3 +502,134 @@ set(LEVEL_ZERO_URI https://github.com/oneapi-src/level-zero/archive/refs/tags/${
 set(LEVEL_ZERO_HASH c39bb05a8e5898aa6c444e1704105b93d3f1888b9c333f8e7e73825ffbfb2617)
 set(LEVEL_ZERO_HASH_TYPE SHA256)
 set(LEVEL_ZERO_FILE level-zero-${LEVEL_ZERO_VERSION}.tar.gz)
+
+set(DPCPP_VERSION 20220620)
+set(DPCPP_URI https://github.com/intel/llvm/archive/refs/tags/sycl-nightly/${DPCPP_VERSION}.tar.gz)
+set(DPCPP_HASH a5f41abd5229d28afa92cbd8a5d8d786ee698bf239f722929fd686276bad692c)
+set(DPCPP_HASH_TYPE SHA256)
+set(DPCPP_FILE DPCPP-${DPCPP_VERSION}.tar.gz)
+
+########################
+### DPCPP DEPS BEGIN ###
+########################
+# The following deps are build time requirements for dpcpp, when possible
+# the source in the dpcpp source tree for the version chosen is documented
+# by each dep, these will only have to be downloaded and unpacked, dpcpp
+# will take care of building them, unpack is being done in dpcpp_deps.cmake
+
+# Source llvm/lib/SYCLLowerIR/CMakeLists.txt
+set(VCINTRINSICS_VERSION 984bb27baacce6ee5c716c2e64845f2a1928025b)
+set(VCINTRINSICS_URI https://github.com/intel/vc-intrinsics/archive/${VCINTRINSICS_VERSION}.tar.gz)
+set(VCINTRINSICS_HASH abea415a15a0dd11fdc94dee8fb462910f2548311b787e02f42509789e1b0d7b)
+set(VCINTRINSICS_HASH_TYPE SHA256)
+set(VCINTRINSICS_FILE vc-intrinsics-${VCINTRINSICS_VERSION}.tar.gz)
+
+# Source opencl/CMakeLists.txt
+set(OPENCLHEADERS_VERSION dcd5bede6859d26833cd85f0d6bbcee7382dc9b3)
+set(OPENCLHEADERS_URI https://github.com/KhronosGroup/OpenCL-Headers/archive/${OPENCLHEADERS_VERSION}.tar.gz)
+set(OPENCLHEADERS_HASH ca8090359654e94f2c41e946b7e9d826253d795ae809ce7c83a7d3c859624693)
+set(OPENCLHEADERS_HASH_TYPE SHA256)
+set(OPENCLHEADERS_FILE opencl_headers-${OPENCLHEADERS_VERSION}.tar.gz)
+
+# Source opencl/CMakeLists.txt
+set(ICDLOADER_VERSION aec3952654832211636fc4af613710f80e203b0a)
+set(ICDLOADER_URI https://github.com/KhronosGroup/OpenCL-ICD-Loader/archive/${ICDLOADER_VERSION}.tar.gz)
+set(ICDLOADER_HASH e1880551d67bd8dc31d13de63b94bbfd6b1f315b6145dad1ffcd159b89bda93c)
+set(ICDLOADER_HASH_TYPE SHA256)
+set(ICDLOADER_FILE icdloader-${ICDLOADER_VERSION}.tar.gz)
+
+# Source sycl/cmake/modules/AddBoostMp11Headers.cmake
+# Using external MP11 here, getting AddBoostMp11Headers.cmake to recognize
+# our copy in boost directly was more trouble than it was worth.
+set(MP11_VERSION 7bc4e1ae9b36ec8ee635c3629b59ec525bbe82b9)
+set(MP11_URI https://github.com/boostorg/mp11/archive/${MP11_VERSION}.tar.gz)
+set(MP11_HASH 071ee2bd3952ec89882edb3af25dd1816f6b61723f66e42eea32f4d02ceef426)
+set(MP11_HASH_TYPE SHA256)
+set(MP11_FILE mp11-${MP11_VERSION}.tar.gz)
+
+# Source llvm-spirv/CMakeLists.txt (repo)
+# Source llvm-spirv/spirv-headers-tag.conf (hash)
+set(SPIRV_HEADERS_VERSION 36c0c1596225e728bd49abb7ef56a3953e7ed468)
+set(SPIRV_HEADERS_URI https://github.com/KhronosGroup/SPIRV-Headers/archive/${SPIRV_HEADERS_VERSION}.tar.gz)
+set(SPIRV_HEADERS_HASH 7a5c89633f8740456fe8adee052033e134476d267411d1336c0cb1e587a9229a)
+set(SPIRV_HEADERS_HASH_TYPE SHA256)
+set(SPIRV_HEADERS_FILE SPIR-V-Headers-${SPIRV_HEADERS_VERSION}.tar.gz)
+
+######################
+### DPCPP DEPS END ###
+######################
+
+##########################################
+### Intel Graphics Compiler DEPS BEGIN ###
+##########################################
+# The following deps are build time requirements for the intel graphics
+# compiler, the versions used are taken from the following location
+# https://github.com/intel/intel-graphics-compiler/releases
+
+set(IGC_VERSION 1.0.11222)
+set(IGC_URI https://github.com/intel/intel-graphics-compiler/archive/refs/tags/igc-${IGC_VERSION}.tar.gz)
+set(IGC_HASH d92f0608dcbb52690855685f9447282e5c09c0ba98ae35fabf114fcf8b1e9fcf)
+set(IGC_HASH_TYPE SHA256)
+set(IGC_FILE igc-${IGC_VERSION}.tar.gz)
+
+set(IGC_LLVM_VERSION llvmorg-11.1.0)
+set(IGC_LLVM_URI https://github.com/llvm/llvm-project/archive/refs/tags/${IGC_LLVM_VERSION}.tar.gz)
+set(IGC_LLVM_HASH 53a0719f3f4b0388013cfffd7b10c7d5682eece1929a9553c722348d1f866e79)
+set(IGC_LLVM_HASH_TYPE SHA256)
+set(IGC_LLVM_FILE ${IGC_LLVM_VERSION}.tar.gz)
+
+# WARNING WARNING WARNING
+#
+# IGC_OPENCL_CLANG contains patches for some of its dependencies.
+#
+# Whenever IGC_OPENCL_CLANG_VERSION changes, one *MUST* inspect
+# IGC_OPENCL_CLANG's patches folder and update igc.cmake to account for
+# any added or removed patches.
+#
+# WARNING WARNING WARNING
+
+set(IGC_OPENCL_CLANG_VERSION bbdd1587f577397a105c900be114b56755d1f7dc)
+set(IGC_OPENCL_CLANG_URI https://github.com/intel/opencl-clang/archive/${IGC_OPENCL_CLANG_VERSION}.tar.gz)
+set(IGC_OPENCL_CLANG_HASH d08315f1b0d8a6fef33de2b3e6aa7356534c324910634962c72523d970773efc)
+set(IGC_OPENCL_CLANG_HASH_TYPE SHA256)
+set(IGC_OPENCL_CLANG_FILE opencl-clang-${IGC_OPENCL_CLANG_VERSION}.tar.gz)
+
+set(IGC_VCINTRINSICS_VERSION v0.4.0)
+set(IGC_VCINTRINSICS_URI https://github.com/intel/vc-intrinsics/archive/refs/tags/${IGC_VCINTRINSICS_VERSION}.tar.gz)
+set(IGC_VCINTRINSICS_HASH c8b92682ad5031cf9d5b82a40e7d5c0e763cd9278660adbcaa69aab988e4b589)
+set(IGC_VCINTRINSICS_HASH_TYPE SHA256)
+set(IGC_VCINTRINSICS_FILE vc-intrinsics-${IGC_VCINTRINSICS_VERSION}.tar.gz)
+
+set(IGC_SPIRV_HEADERS_VERSION sdk-1.3.204.1)
+set(IGC_SPIRV_HEADERS_URI https://github.com/KhronosGroup/SPIRV-Headers/archive/refs/tags/${IGC_SPIRV_HEADERS_VERSION}.tar.gz)
+set(IGC_SPIRV_HEADERS_HASH 262864053968c217d45b24b89044a7736a32361894743dd6cfe788df258c746c)
+set(IGC_SPIRV_HEADERS_HASH_TYPE SHA256)
+set(IGC_SPIRV_HEADERS_FILE SPIR-V-Headers-${IGC_SPIRV_HEADERS_VERSION}.tar.gz)
+
+set(IGC_SPIRV_TOOLS_VERSION sdk-1.3.204.1)
+set(IGC_SPIRV_TOOLS_URI https://github.com/KhronosGroup/SPIRV-Tools/archive/refs/tags/${IGC_SPIRV_TOOLS_VERSION}.tar.gz)
+set(IGC_SPIRV_TOOLS_HASH 6e19900e948944243024aedd0a201baf3854b377b9cc7a386553bc103b087335)
+set(IGC_SPIRV_TOOLS_HASH_TYPE SHA256)
+set(IGC_SPIRV_TOOLS_FILE SPIR-V-Tools-${IGC_SPIRV_TOOLS_VERSION}.tar.gz)
+
+set(IGC_SPIRV_TRANSLATOR_VERSION 99420daab98998a7e36858befac9c5ed109d4920)
+set(IGC_SPIRV_TRANSLATOR_URI https://github.com/KhronosGroup/SPIRV-LLVM-Translator/archive/${IGC_SPIRV_TRANSLATOR_VERSION}.tar.gz)
+set(IGC_SPIRV_TRANSLATOR_HASH 77dfb4ddb6bfb993535562c02ddea23f0a0d1c5a0258c1afe7e27c894ff783a8)
+set(IGC_SPIRV_TRANSLATOR_HASH_TYPE SHA256)
+set(IGC_SPIRV_TRANSLATOR_FILE SPIR-V-Translator-${IGC_SPIRV_TRANSLATOR_VERSION}.tar.gz)
+
+########################################
+### Intel Graphics Compiler DEPS END ###
+########################################
+
+set(GMMLIB_VERSION intel-gmmlib-22.1.2)
+set(GMMLIB_URI https://github.com/intel/gmmlib/archive/refs/tags/${GMMLIB_VERSION}.tar.gz)
+set(GMMLIB_HASH 3b9a6d5e7e3f5748b3d0a2fb0e980ae943907fece0980bd9c0508e71c838e334)
+set(GMMLIB_HASH_TYPE SHA256)
+set(GMMLIB_FILE ${GMMLIB_VERSION}.tar.gz)
+
+set(OCLOC_VERSION 22.20.23198)
+set(OCLOC_URI https://github.com/intel/compute-runtime/archive/refs/tags/${OCLOC_VERSION}.tar.gz)
+set(OCLOC_HASH ab22b8bf2560a57fdd3def0e35a62ca75991406f959c0263abb00cd6cd9ae998)
+set(OCLOC_HASH_TYPE SHA256)
+set(OCLOC_FILE ocloc-${OCLOC_VERSION}.tar.gz)