[SYCL] remove global variables (#7710)

* separate DPCT helpers outside

* replace global variables with context

* remove useless extra

* update mul_mat condition

* remove duplicate buft initialization

* remove duplicate extra and global work group size

* remove useless backend check

* remove duplicated extras

* use macro for group_size and remove cuda-related

Author: airMeng

src/ggml-sycl/backend.hpp

@@ -0,0 +1,18 @@
+//
+// MIT license
+// Copyright (C) 2024 Intel Corporation
+// SPDX-License-Identifier: MIT
+//
+
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+
+#ifndef GGML_SYCL_BACKEND_HPP
+#define GGML_SYCL_BACKEND_HPP
+
+#include "common.hpp"
+
+#endif // GGML_SYCL_BACKEND_HPP

src/ggml-sycl/common.cpp

@@ -0,0 +1,53 @@
+//
+// MIT license
+// Copyright (C) 2024 Intel Corporation
+// SPDX-License-Identifier: MIT
+//
+
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+
+#include "common.hpp"
+
+int get_current_device_id() {
+  return dpct::dev_mgr::instance().current_device_id();
+}
+
+void* ggml_sycl_host_malloc(size_t size) try {
+  if (getenv("GGML_SYCL_NO_PINNED") != nullptr) {
+    return nullptr;
+  }
+
+  void* ptr = nullptr;
+  // allow to use dpct::get_in_order_queue() for host malloc
+  dpct::err0 err = CHECK_TRY_ERROR(
+      ptr = (void*)sycl::malloc_host(size, dpct::get_in_order_queue()));
+
+  if (err != 0) {
+    // clear the error
+    fprintf(
+        stderr,
+        "WARNING: failed to allocate %.2f MB of pinned memory: %s\n",
+        size / 1024.0 / 1024.0,
+        "syclGetErrorString is not supported");
+    return nullptr;
+  }
+
+  return ptr;
+} catch (sycl::exception const& exc) {
+  std::cerr << exc.what() << "Exception caught at file:" << __FILE__
+            << ", line:" << __LINE__ << std::endl;
+  std::exit(1);
+}
+
+void ggml_sycl_host_free(void* ptr) try {
+  // allow to use dpct::get_in_order_queue() for host malloc
+  SYCL_CHECK(CHECK_TRY_ERROR(sycl::free(ptr, dpct::get_in_order_queue())));
+} catch (sycl::exception const& exc) {
+  std::cerr << exc.what() << "Exception caught at file:" << __FILE__
+            << ", line:" << __LINE__ << std::endl;
+  std::exit(1);
+}

src/ggml-sycl/common.hpp

@@ -0,0 +1,298 @@
+//
+// MIT license
+// Copyright (C) 2024 Intel Corporation
+// SPDX-License-Identifier: MIT
+//
+
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+
+#ifndef GGML_SYCL_COMMON_HPP
+#define GGML_SYCL_COMMON_HPP
+
+#include <fstream>
+#include <iostream>
+
+#include "dpct/helper.hpp"
+#include "presets.hpp"
+
+#define GGML_COMMON_DECL_SYCL
+#define GGML_COMMON_IMPL_SYCL
+#include "ggml-common.h"
+
+void* ggml_sycl_host_malloc(size_t size);
+void ggml_sycl_host_free(void* ptr);
+
+static int g_ggml_sycl_debug = 0;
+#define GGML_SYCL_DEBUG(...)        \
+  do {                              \
+    if (g_ggml_sycl_debug)          \
+      fprintf(stderr, __VA_ARGS__); \
+  } while (0)
+
+#define CHECK_TRY_ERROR(expr)                                            \
+  [&]() {                                                                \
+    try {                                                                \
+      expr;                                                              \
+      return dpct::success;                                              \
+    } catch (std::exception const& e) {                                  \
+      std::cerr << e.what() << "\nException caught at file:" << __FILE__ \
+                << ", line:" << __LINE__ << ", func:" << __func__        \
+                << std::endl;                                            \
+      return dpct::default_error;                                        \
+    }                                                                    \
+  }()
+
+// #define DEBUG_SYCL_MALLOC
+
+static int g_work_group_size = 0;
+// typedef sycl::half ggml_fp16_t;
+
+#define __SYCL_ARCH__ DPCT_COMPATIBILITY_TEMP
+#define VER_4VEC 610 // todo for hardward optimize.
+#define VER_GEN9 700 // todo for hardward optimize.
+#define VER_GEN12 1000000 // todo for hardward optimize.
+#define VER_GEN13 (VER_GEN12 + 1030) // todo for hardward optimize.
+
+#define GGML_SYCL_MAX_NODES 8192 // TODO: adapt to hardwares
+
+// define for XMX in Intel GPU
+// TODO: currently, it's not used for XMX really.
+#if !defined(GGML_SYCL_FORCE_MMQ)
+    #define SYCL_USE_XMX
+#endif
+
+// max batch size to use MMQ kernels when tensor cores are available
+#define MMQ_MAX_BATCH_SIZE 32
+
+#if defined(_MSC_VER)
+#pragma warning(disable : 4244 4267) // possible loss of data
+#endif
+
+// dmmv = dequantize_mul_mat_vec
+#ifndef GGML_SYCL_DMMV_X
+#define GGML_SYCL_DMMV_X 32
+#endif
+#ifndef GGML_SYCL_MMV_Y
+#define GGML_SYCL_MMV_Y 1
+#endif
+
+typedef sycl::queue *queue_ptr;
+
+enum ggml_sycl_backend_gpu_mode {
+  SYCL_UNSET_GPU_MODE = -1,
+  SYCL_SINGLE_GPU_MODE = 0,
+  SYCL_MUL_GPU_MODE
+};
+
+static_assert(sizeof(sycl::half) == sizeof(ggml_fp16_t), "wrong fp16 size");
+
+static void crash() {
+  int* ptr = NULL;
+  *ptr = 0;
+}
+
+[[noreturn]] static void ggml_sycl_error(
+    const char* stmt,
+    const char* func,
+    const char* file,
+    const int line,
+    const char* msg) {
+  fprintf(stderr, "SYCL error: %s: %s\n", stmt, msg);
+  fprintf(stderr, "  in function %s at %s:%d\n", func, file, line);
+  GGML_ASSERT(!"SYCL error");
+}
+
+#define SYCL_CHECK(err)                     \
+  do {                                      \
+    auto err_ = (err);                      \
+    if (err_ != 0)                          \
+      ggml_sycl_error(                      \
+          #err,                             \
+          __func__,                         \
+          __FILE__,                         \
+          __LINE__,                         \
+          "Meet error in this line code!"); \
+  } while (0)
+
+#if DPCT_COMPAT_RT_VERSION >= 11100
+#define GGML_SYCL_ASSUME(x) __builtin_assume(x)
+#else
+#define GGML_SYCL_ASSUME(x)
+#endif // DPCT_COMPAT_RT_VERSION >= 11100
+
+#ifdef GGML_SYCL_F16
+typedef sycl::half dfloat; // dequantize float
+typedef sycl::half2 dfloat2;
+#else
+typedef float dfloat; // dequantize float
+typedef sycl::float2 dfloat2;
+#endif // GGML_SYCL_F16
+
+#define MMVQ_MAX_BATCH_SIZE  8
+
+static const int8_t kvalues_iq4nl[16]={-127, -104, -83, -65, -49, -35, -22, -10, 1, 13, 25, 38, 53, 69, 89, 113};
+
+static int g_all_sycl_device_count = -1;
+static bool g_ggml_backend_sycl_buffer_type_initialized = false;
+
+static ggml_sycl_backend_gpu_mode g_ggml_sycl_backend_gpu_mode =
+    SYCL_UNSET_GPU_MODE;
+
+static void* g_scratch_buffer = nullptr;
+static size_t g_scratch_size = 0; // disabled by default
+static size_t g_scratch_offset = 0;
+
+[[noreturn]] static inline void bad_arch(const sycl::stream& stream_ct1) {
+  stream_ct1 << "ERROR: ggml-sycl was compiled without support for the "
+                "current GPU architecture.\n";
+  // __trap();
+  std::exit(1);
+
+  (void)bad_arch; // suppress unused function warning
+}
+
+int get_current_device_id();
+
+inline dpct::err0 ggml_sycl_set_device(const int device) try {
+
+  int current_device_id;
+  SYCL_CHECK(CHECK_TRY_ERROR(current_device_id = get_current_device_id()));
+
+  // GGML_SYCL_DEBUG("ggml_sycl_set_device device_id=%d,
+  // current_device_id=%d\n", device, current_device);
+  if (device == current_device_id) {
+    return 0;
+  }
+
+  return CHECK_TRY_ERROR(dpct::select_device(device));
+} catch (sycl::exception const& exc) {
+  std::cerr << exc.what() << "Exception caught at file:" << __FILE__
+            << ", line:" << __LINE__ << std::endl;
+  crash();
+  std::exit(1);
+}
+
+//////////////////////
+
+struct ggml_sycl_device_info {
+    int device_count;
+
+    struct sycl_device_info {
+        int     cc;                 // compute capability
+        // int     nsm;                // number of streaming multiprocessors
+        // size_t  smpb;               // max. shared memory per block
+        bool    vmm;                // virtual memory support
+        size_t  total_vram;
+    };
+
+    sycl_device_info devices[GGML_SYCL_MAX_DEVICES] = {};
+
+    std::array<float, GGML_SYCL_MAX_DEVICES> default_tensor_split = {};
+};
+
+const ggml_sycl_device_info & ggml_sycl_info();
+
+struct ggml_sycl_pool {
+    virtual ~ggml_sycl_pool() = default;
+
+    virtual void * alloc(size_t size, size_t * actual_size) = 0;
+    virtual void free(void * ptr, size_t size) = 0;
+};
+
+template<typename T>
+struct ggml_sycl_pool_alloc {
+    ggml_sycl_pool * pool = nullptr;
+    T * ptr = nullptr;
+    size_t actual_size = 0;
+
+    explicit ggml_sycl_pool_alloc(ggml_sycl_pool & pool) : pool(&pool) {
+    }
+
+    ggml_sycl_pool_alloc(ggml_sycl_pool & pool, size_t size) : pool(&pool) {
+        alloc(size);
+    }
+
+    ~ggml_sycl_pool_alloc() {
+        if (ptr != nullptr) {
+            pool->free(ptr, actual_size);
+        }
+    }
+
+    // size is in number of elements
+    T * alloc(size_t size) {
+        GGML_ASSERT(pool != nullptr);
+        GGML_ASSERT(ptr == nullptr);
+        ptr = (T *) pool->alloc(size * sizeof(T), &this->actual_size);
+        return ptr;
+    }
+
+    T * alloc(ggml_sycl_pool & pool, size_t size) {
+        this->pool = &pool;
+        return alloc(size);
+    }
+
+    T * get() {
+        return ptr;
+    }
+
+    ggml_sycl_pool_alloc() = default;
+    ggml_sycl_pool_alloc(const ggml_sycl_pool_alloc &) = delete;
+    ggml_sycl_pool_alloc(ggml_sycl_pool_alloc &&) = delete;
+    ggml_sycl_pool_alloc& operator=(const ggml_sycl_pool_alloc &) = delete;
+    ggml_sycl_pool_alloc& operator=(ggml_sycl_pool_alloc &&) = delete;
+};
+
+// backend interface
+
+struct ggml_tensor_extra_gpu {
+  void* data_device[GGML_SYCL_MAX_DEVICES]; // 1 pointer for each device for split
+                                       // tensors
+  dpct::event_ptr events[GGML_SYCL_MAX_DEVICES]
+                        [GGML_SYCL_MAX_STREAMS]; // events for synchronizing multiple GPUs
+};
+
+struct ggml_backend_sycl_context {
+    int device;
+    std::string name;
+
+    queue_ptr qptrs[GGML_SYCL_MAX_DEVICES][GGML_SYCL_MAX_STREAMS] = { { nullptr } };
+
+    explicit ggml_backend_sycl_context(int device) :
+        device(device),
+        name(GGML_SYCL_NAME + std::to_string(device)) {
+    }
+
+    queue_ptr stream(int device, int stream) {
+        if (qptrs[device][stream] == nullptr) {
+            qptrs[device][stream] = &(dpct::get_current_device().default_queue());
+        }
+        return qptrs[device][stream];
+    }
+
+    queue_ptr stream() {
+        return stream(device, 0);
+    }
+
+    // pool
+    std::unique_ptr<ggml_sycl_pool> pools[GGML_SYCL_MAX_DEVICES];
+
+    static std::unique_ptr<ggml_sycl_pool> new_pool_for_device(queue_ptr qptr, int device);
+
+    ggml_sycl_pool & pool(int device) {
+        if (pools[device] == nullptr) {
+            pools[device] = new_pool_for_device(stream(device,0), device);
+        }
+        return *pools[device];
+    }
+
+    ggml_sycl_pool & pool() {
+        return pool(device);
+    }
+};
+
+
+#endif // GGML_SYCL_COMMON_HPP