PR: Refine ggml-hexagon backend(Qualcomm Hexagon NPU backend) for latest ggml,whisper.cpp,llama.cpp

CMakeLists.txt

@@ -7,6 +7,21 @@ set(CMAKE_WARN_UNUSED_CLI YES)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+if(CMAKE_SYSTEM_NAME STREQUAL "Android")
+    if(DEFINED HTP_ARCH_VERSION)
+        if (${HTP_ARCH_VERSION} STREQUAL "v75" OR ${HTP_ARCH_VERSION} STREQUAL "v79")
+            #works fine on Snapdragon 8Gen3&8Elite with 1.5x - 3x performance gains with the default ggml backend
+            #refer to:https://github.com/kantv-ai/kantv/issues/287
+            set(OPT_FLAG " -O3 -march=armv8.7-a -flto -D_GNU_SOURCE -fvectorize -ffp-model=fast -fno-finite-math-only")
+            message("OPT_FLAG:${OPT_FLAG}")
+            set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+            set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+            set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+        endif()
+    endif()
+endif()
+
 if (NOT XCODE AND NOT MSVC AND NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
     set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
@@ -120,6 +135,7 @@ llama_option_depr(WARNING     LLAMA_RPC                 GGML_RPC)
 llama_option_depr(WARNING     LLAMA_SYCL                GGML_SYCL)
 llama_option_depr(WARNING     LLAMA_SYCL_F16            GGML_SYCL_F16)
 llama_option_depr(WARNING     LLAMA_CANN                GGML_CANN)
+llama_option_depr(WARNING     LLAMA_HEXAGON             GGML_HEXAGON)
 
 if (NOT MSVC)
     if (LLAMA_SANITIZE_THREAD)

ggml/CMakeLists.txt

@@ -204,6 +204,7 @@ option(GGML_OPENCL_EMBED_KERNELS            "ggml: embed kernels"
 option(GGML_OPENCL_USE_ADRENO_KERNELS       "ggml: use optimized kernels for Adreno"          ON)
 set   (GGML_OPENCL_TARGET_VERSION "300" CACHE STRING
                                             "gmml: OpenCL API version to target")
+option(GGML_HEXAGON                         "ggml: use HEXAGON"                               OFF)
 
 # toolchain for vulkan-shaders-gen
 set   (GGML_VULKAN_SHADERS_GEN_TOOLCHAIN "" CACHE FILEPATH "ggml: toolchain file for vulkan-shaders-gen")
@@ -269,6 +270,7 @@ set(GGML_PUBLIC_HEADERS
     include/ggml-rpc.h
     include/ggml-sycl.h
     include/ggml-vulkan.h
+    include/ggml-hexagon.h
     include/gguf.h)
 
 set_target_properties(ggml PROPERTIES PUBLIC_HEADER "${GGML_PUBLIC_HEADERS}")

ggml/include/ggml-hexagon.h

@@ -0,0 +1,54 @@
+ /*
+ * Copyright (c) 2024-2025 The ggml authors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#pragma once
+
+#include "ggml.h"
+#include "ggml-backend.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GGML_HEXAGON_MAX_DEVICES    4
+#define GGML_HEXAGON_BACKEND_NAME   "hexagon"
+
+enum HEXAGONBackend {
+    HEXAGON_BACKEND_QNNCPU  = 0,
+    HEXAGON_BACKEND_QNNGPU  = 1,
+    HEXAGON_BACKEND_QNNNPU  = 2,
+    HEXAGON_BACKEND_CDSP    = 3,
+    HEXAGON_BACKEND_GGML    = 4, //"fake" HEXAGON backend for compare performance between HEXAGON backend and ggml backend
+};
+
+GGML_BACKEND_API ggml_backend_t ggml_backend_hexagon_init(size_t dev_num, const char * qnn_lib_path);
+
+GGML_BACKEND_API bool           ggml_backend_is_hexagon(ggml_backend_t backend);
+
+GGML_BACKEND_API int            ggml_backend_hexagon_get_device_count(void);
+
+GGML_BACKEND_API ggml_backend_reg_t ggml_backend_hexagon_reg(void);
+
+const char * ggml_backend_hexagon_get_devname(size_t dev_num);
+
+#ifdef __cplusplus
+}
+#endif

ggml/src/CMakeLists.txt

@@ -313,6 +313,7 @@ ggml_add_backend(RPC)
 ggml_add_backend(SYCL)
 ggml_add_backend(Vulkan)
 ggml_add_backend(OpenCL)
+ggml_add_backend(HEXAGON)
 
 foreach (target ggml-base ggml)
     target_include_directories(${target} PUBLIC    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include> $<INSTALL_INTERFACE:include>)

ggml/src/ggml-backend-reg.cpp

@@ -65,6 +65,10 @@
 #include "ggml-kompute.h"
 #endif
 
+#ifdef GGML_USE_HEXAGON
+#include "ggml-hexagon.h"
+#endif
+
 // disable C++17 deprecation warning for std::codecvt_utf8
 #if defined(__clang__)
 #    pragma clang diagnostic push
@@ -187,6 +191,9 @@ struct ggml_backend_registry {
 #ifdef GGML_USE_KOMPUTE
         register_backend(ggml_backend_kompute_reg());
 #endif
+#ifdef GGML_USE_HEXAGON
+        register_backend(ggml_backend_hexagon_reg());
+#endif
 #ifdef GGML_USE_CPU
         register_backend(ggml_backend_cpu_reg());
 #endif
@@ -577,6 +584,7 @@ void ggml_backend_load_all_from_path(const char * dir_path) {
     ggml_backend_load_best("vulkan", silent, dir_path);
     ggml_backend_load_best("opencl", silent, dir_path);
     ggml_backend_load_best("musa", silent, dir_path);
+    ggml_backend_load_best("hexagon", silent, dir_path);
     ggml_backend_load_best("cpu", silent, dir_path);
     // check the environment variable GGML_BACKEND_PATH to load an out-of-tree backend
     const char * backend_path = std::getenv("GGML_BACKEND_PATH");

ggml/src/ggml-hexagon/CMakeLists.txt

@@ -0,0 +1,133 @@
+project(ggml-hexagon)
+message(STATUS "Using HEXAGON backend")
+message("CMAKE_SYSTEM_NAME : ${CMAKE_SYSTEM_NAME}")
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if(NOT DEFINED QNN_SDK_PATH)
+    message(FATAL_ERROR "QNN_SDK_PATH not defined")
+endif()
+
+if(NOT DEFINED HEXAGON_SDK_PATH)
+    message(FATAL_ERROR "HEXAGON_SDK_PATH not defined")
+endif()
+
+message("QNN_SDK_PATH    : ${QNN_SDK_PATH}")
+message("HEXAGON_SDK_PATH: ${HEXAGON_SDK_PATH}")
+message("HTP_ARCH_VERSION: ${HTP_ARCH_VERSION}")
+
+if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+    set(DEBUG_FLAG "-Wall")
+    message("Debug mode:${DEBUG_FLAG}")
+else()
+    set(DEBUG_FLAG "-DNDEBUG -Wall")
+#manually disable all verbose logs in ggml-hexagon/CMakeLists.txt to
+#make compare NPU performance through llama-bench more clear
+#set(DEBUG_FLAG "-DNDEBUG -Wall -DDISABLE_ALL_LOG")
+    message("Release mode:${DEBUG_FLAG}")
+endif()
+
+#v68 --- Snapdragon 888
+#v69 --- Snapdragon 8 Gen1
+#v73 --- Snapdragon 8 Gen2
+#v75 --- Snapdragon 8 Gen3
+#v79 --- Snapdragon 8 Elite(aka Gen4)
+if(NOT DEFINED HTP_ARCH_VERSION)
+    message(FATAL_ERROR "HTP_ARCH_VERSION not defined, valid htp arch: v68,v69,v73,v75,v79")
+endif()
+
+#check whether user's specified htp arch is valid
+set(CHECK_HTP_ARCH "WRONG")
+foreach (feat v68 v69 v73 v75 v79)
+    if (${feat} STREQUAL ${HTP_ARCH_VERSION})
+        set(CHECK_HTP_ARCH "GOOD")
+    endif()
+endforeach()
+if (${CHECK_HTP_ARCH} STREQUAL "WRONG")
+    message(FATAL_ERROR "ggml-hexagon backend only support htp arch v68,v69,v73,v75,v79")
+endif()
+
+#check optimization flags
+set(OPT_FLAG " ")
+if (${HTP_ARCH_VERSION} STREQUAL "v75" OR ${HTP_ARCH_VERSION} STREQUAL "v79")
+    #works fine on Snapdragon 8Gen3&8Elite with 1.5x - 3x performance gains with the default ggml backend
+    set(OPT_FLAG " -O3 -march=armv8.7-a -mcpu=cortex-x1 -mtune=cortex-x1 -flto -D_GNU_SOURCE -fvectorize -ffp-model=fast -fno-finite-math-only")
+endif()
+message("OPT_FLAG:${OPT_FLAG}")
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Android")
+    find_library(LOG_LIB log)
+
+    add_library(cdsprpc
+        SHARED
+        IMPORTED)
+    set_target_properties(cdsprpc
+        PROPERTIES
+        IMPORTED_LOCATION
+        ${HEXAGON_SDK_PATH}/ipc/fastrpc/remote/ship/android_aarch64/libcdsprpc.so)
+
+    set(QNN_LINK_LIBRARIES ${LOG_LIB} cdsprpc)
+    set(QNN_DEFAULT_LIB_SEARCH_PATH "/data/local/tmp/" CACHE STRING "customized library search path for QNN backend")
+
+    include_directories(${HEXAGON_SDK_PATH}/incs)
+    include_directories(${HEXAGON_SDK_PATH}/incs/stddef)
+    include_directories(${HEXAGON_SDK_PATH}/ipc/fastrpc/incs)
+    include_directories(${HEXAGON_SDK_PATH}/ipc/fastrpc/rpcmem/inc)
+    include_directories(${HEXAGON_SDK_PATH}/ipc/fastrpc/remote/ship/android_Debug_aarch64)
+    include_directories(${HEXAGON_SDK_PATH}/utils/examples)
+    include_directories(${HEXAGON_SDK_PATH}/ipc/fastrpc/rtld/ship/android_aarch64)
+    include_directories(${HEXAGON_SDK_PATH}/libs/atomic/inc)
+    include_directories(${HEXAGON_SDK_PATH}/libs/atomic/android_Debug_aarch64/ship)
+    include_directories(${CMAKE_SOURCE_DIR}/ggml/src/ggml-hexagon/)
+    include_directories(${CMAKE_SOURCE_DIR}/ggml/src/ggml-hexagon/kernels/)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+    set(QNN_DEFAULT_LIB_SEARCH_PATH "C:\\" CACHE STRING "customized library search path for QNN backend")
+else()
+    message(FATAL_ERROR "ggml-hexagon now only available on Android and Windows(Windows on ARM)")
+endif()
+
+set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DGGML_USE_HEXAGON ${DEBUG_FLAG} ${OPT_FLAG}")
+
+file(GLOB HEXAGON_SOURCES "${CMAKE_CURRENT_LIST_DIR}/*.cpp" "${CMAKE_CURRENT_LIST_DIR}/kernels/stub.c")
+ggml_add_backend_library(ggml-hexagon ${HEXAGON_SOURCES})
+
+target_include_directories(ggml-hexagon PRIVATE ${QNN_SDK_PATH}/include/QNN ${HEXAGON_SDK_PATH} ${CMAKE_CURRENT_LIST_DIR})
+target_link_libraries(ggml-hexagon PRIVATE ${QNN_LINK_LIBRARIES})
+
+string(REGEX REPLACE "/$" "" QNN_DEFAULT_LIB_SEARCH_PATH "${QNN_DEFAULT_LIB_SEARCH_PATH}")
+target_compile_definitions(ggml-hexagon PRIVATE QNN_DEFAULT_LIB_SEARCH_PATH="${QNN_DEFAULT_LIB_SEARCH_PATH}/")
+
+#cross compiling source codes of hexagon kernels which running on cDSP side
+function(ggml_hexagon_build_kernel KNAME)
+    message(STATUS "ggml_hexagon: build hexagon-kernel ${KNAME}")
+
+    add_custom_command(
+        TARGET ${PROJECT_NAME}
+        POST_BUILD
+        COMMAND echo "current working path:`pwd`\n"
+        COMMAND echo "${CMAKE_CURRENT_LIST_DIR}/kernels"
+        COMMAND make -C ${CMAKE_CURRENT_LIST_DIR}/kernels/ clean
+        COMMAND make -C ${CMAKE_CURRENT_LIST_DIR}/kernels/ HEXAGON_SDK_PATH=${HEXAGON_SDK_PATH} HTP_ARCH_VERSION=${HTP_ARCH_VERSION} DEBUG_FLAG=${DEBUG_FLAG}
+        COMMAND echo "current working path:`pwd`\n"
+        COMMAND ls -l  ../../../bin/libggmlop-skel.so
+        COMMENT "build hexagon-kernel"
+    )
+endfunction()
+
+function(ggml_hexagon_setup_cfg KNAME)
+    message(STATUS "ggml_hexagon: setup runtime configuration file ${KNAME}")
+    add_custom_command(
+        TARGET ${PROJECT_NAME}
+        POST_BUILD
+        COMMAND echo "current working path:`pwd`\n"
+        COMMAND /bin/cp -fv ../../../../../scripts/${KNAME}  ../../../bin/
+        COMMENT "setup runtime configuration file"
+    )
+endfunction()
+
+ggml_hexagon_build_kernel("cdsp")
+ggml_hexagon_setup_cfg("ggml-hexagon.cfg")