[Mlir-commits] [mlir] [uArch][XeGPU] Add XeGPU uArch definition. (PR #153706)

[Artem Kroviakov]

================
@@ -0,0 +1,183 @@
+//===--- IntelGpuXe2.h ------------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// \file
+// Xe2 uArch definition. Xe2 is the second generation of Intel Xe GPUs.
+// This file defines the uArch details for Xe2 and its derived architectures.
+// This includes Ponte Vecchio (PVC) and Battlemage (BMG) architectures.
+//
+//===----------------------------------------------------------------------===//
+#ifndef MLIR_DIALECT_XEGPU_UARCH_INTELGPUXE2_H
+#define MLIR_DIALECT_XEGPU_UARCH_INTELGPUXE2_H
+
+#include "mlir/Dialect/XeGPU/uArch/uArchInterfaces.h"
+#include "mlir/IR/BuiltinTypes.h"
+#include "mlir/IR/TypeUtilities.h"
+#include <map>
+#include <string>
+#include <vector>
+
+namespace mlir {
+namespace xegpu {
+namespace uArch {
+namespace Xe2Plus {
+struct XeCoreInfo {
+  uint32_t num_threads;
+  SharedMemory shared_memory;
+  uint32_t num_vector_units;
+  uint32_t num_matrix_units;
+
+  // Constructor
+  XeCoreInfo(uint32_t num_threads, const SharedMemory &shared_memory,
+             uint32_t num_vector_units, uint32_t num_matrix_units)
+      : num_threads(num_threads), shared_memory(shared_memory),
+        num_vector_units(num_vector_units), num_matrix_units(num_matrix_units) {
+  }
+};
+
+struct Xe2Plus : public uArch {
+  XeCoreInfo xe_core;
+  Xe2Plus(
+      const std::string &archName, const std::string &archDescription,
+      const XeCoreInfo &xeCore,
+      const std::vector<uArchHierarchyComponent> &hierarchy = {},
+      const std::map<std::string, RegisterFileInfo> &regInfo = {},
+      const std::vector<CacheInfo> &cacheInfo = {},
+      const std::map<std::string, std::shared_ptr<Instruction>> &instrs = {})
+      : uArch(archName, archDescription, hierarchy, regInfo, cacheInfo, instrs),
+        xe_core(xeCore) {}
+};
+
+// struct to represent DPAS instruction
+struct DPASInstruction : public Instruction, public MMAInstructionInterface {
+  DPASInstruction()
+      : Instruction("dpas",                   // name
+                    "Dot Product Accumulate") // description
+  {}
+
+  // Override all virtuals from MatrixOpInterface
+  virtual std::vector<std::pair<uint32_t, uint32_t>>
+  getSupportedShapes(mlir::Type dataType, MMAOpndEnum matrixType) override;
+  virtual std::vector<mlir::Type>
+  getSupportedTypes(MLIRContext &context, MMAOpndEnum matrixType) override;
+  virtual bool
+  checkSupportedShapesAndTypes(std::pair<uint32_t, uint32_t> AShape,
+                               std::pair<uint32_t, uint32_t> BShape,
+                               std::pair<uint32_t, uint32_t> CShape,
+                               std::pair<uint32_t, uint32_t> DShape,
+                               mlir::Type AType, mlir::Type BType,
+                               mlir::Type CType, mlir::Type DType) override;
+  virtual bool checkSupportedTypes(mlir::Type AType, mlir::Type BType,
+                                   mlir::Type CType, mlir::Type DType) override;
+  virtual bool validate(std::pair<uint32_t, uint32_t> AShape,
+                        std::pair<uint32_t, uint32_t> BShape,
+                        std::pair<uint32_t, uint32_t> CShape,
+                        std::pair<uint32_t, uint32_t> DShape, mlir::Type AType,
+                        mlir::Type BType, mlir::Type CType,
+                        mlir::Type DType) override;
+  virtual std::vector<uint32_t> getSupportedM(mlir::Type type) override;
+  virtual std::vector<uint32_t> getSupportedK(mlir::Type type) override;
+  virtual std::vector<uint32_t> getSupportedN(mlir::Type type) override;
+};
+
+namespace PVCuArch {
+struct PVCuArch : public Xe2Plus {
+  // Maintaines ownership of the instructions owned by PVUarch
+  std::vector<std::shared_ptr<Instruction>> owned_instructions;
+  PVCuArch()
+      : Xe2Plus("pvc",                        // archName
+                "Ponte Vecchio Architecture", // archDescription
+                XeCoreInfo(8, SharedMemory(512 * 1024, 4), 8, 8), // xeCore
+                {/* register_file_info */}, // Optional: empty
+                {/* cache_info */},         // Optional: empty
+                {/* instructions */}        // Optional: empty
+        ) {
+    // Initialize uArchHierarchy
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("thread", 0));
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("XeCore", 8));
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("XeSlice", 16));
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("XeStack", 4));
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("gpu", 2));
+    // Intialize register file info
+    // GRF
+    this->register_file_info.emplace(
+        "GRF",
+        RegisterFileInfo(64 * 1024,          // size in bits
+                         {"small", "large"}, // GRF modes
+                         {128, 256},         // registers per thread per mode
+                         0,                  // number of banks
+                         0                   // bank size
+                         ));
+    // Initialize cache info
+    // L1 cache, XeCore level
+    this->cache_info.push_back(
+        CacheInfo(512 * 1024, 64, this->uArch_hierarchy[1]));
+    // L3 cache, XeStack level
+    this->cache_info.push_back(
+        CacheInfo(512 * 1024, 64, this->uArch_hierarchy[3]));
+
+    // Add the instructions
+    auto dpas = std::make_shared<DPASInstruction>();
+    instructions.emplace(dpas->getName(), dpas);
+    // instructions[dpas->name] = dpas.get();
+    owned_instructions.push_back(dpas);
+  }
+};
+} // namespace PVCuArch
+
+namespace BMGuArch {
+struct BMGuArch : public Xe2Plus {
+  // Maintaines ownership of the instructions owned by PVUarch
+  std::vector<std::shared_ptr<Instruction>> owned_instructions;
+  BMGuArch()
+      : Xe2Plus("bmg",                     // archName
+                "Battlemage Architecture", // archDescription
+                XeCoreInfo(8, SharedMemory(256 * 1024, 4), 8, 8), // xeCore
+                {/* register_file_info */}, // Optional: empty
+                {/* cache_info */},         // Optional: empty
+                {/* instructions */},       // Optional: empty
+                {/* restrictions */}        // Optional: empty
+        ) {
+    // Initialize uArchHierarchy
+    this->uArch_hierarchy.push_back(uArchHierarchyComponent("thread", 0));
----------------
akroviakov wrote:

How shall one interpret `no_of_component` being 0? The end of hierarchy? Where is this "lower level component count" semantics required, that it is better than a direct correspondence (eliminating the gpu level)?

https://github.com/llvm/llvm-project/pull/153706