Introduce skeleton of the GPU Compute Engine.

3 files changed, 202 insertions, 8 deletions

diff --git a/src/video_core/engines/kepler_compute.cpp b/src/video_core/engines/kepler_compute.cpp
index b1d950460..28f1f6a7d 100644
--- a/src/video_core/engines/kepler_compute.cpp
+++ b/src/video_core/engines/kepler_compute.cpp
@@ -4,12 +4,21 @@
 
 #include "common/assert.h"
 #include "common/logging/log.h"
+#include "core/core.h"
 #include "video_core/engines/kepler_compute.h"
+#include "video_core/engines/maxwell_3d.h"
 #include "video_core/memory_manager.h"
+#include "video_core/rasterizer_interface.h"
+#include "video_core/renderer_base.h"
+#include "video_core/textures/decoders.h"
 
 namespace Tegra::Engines {
 
-KeplerCompute::KeplerCompute(MemoryManager& memory_manager) : memory_manager{memory_manager} {}
+KeplerCompute::KeplerCompute(Core::System& system, VideoCore::RasterizerInterface& rasterizer,
+                             MemoryManager& memory_manager)
+    : system{system}, rasterizer{rasterizer}, memory_manager{memory_manager}, upload_state{
+                                                                                  memory_manager,
+                                                                                  regs.upload} {}
 
 KeplerCompute::~KeplerCompute() = default;
 
@@ -20,14 +29,34 @@ void KeplerCompute::CallMethod(const GPU::MethodCall& method_call) {
     regs.reg_array[method_call.method] = method_call.argument;
 
     switch (method_call.method) {
+    case KEPLER_COMPUTE_REG_INDEX(exec_upload): {
+        upload_state.ProcessExec(regs.exec_upload.linear != 0);
+        break;
+    }
+    case KEPLER_COMPUTE_REG_INDEX(data_upload): {
+        bool is_last_call = method_call.IsLastCall();
+        upload_state.ProcessData(method_call.argument, is_last_call);
+        if (is_last_call) {
+            system.GPU().Maxwell3D().dirty_flags.OnMemoryWrite();
+        }
+        break;
+    }
     case KEPLER_COMPUTE_REG_INDEX(launch):
-        // Abort execution since compute shaders can be used to alter game memory (e.g. CUDA
-        // kernels)
-        UNREACHABLE_MSG("Compute shaders are not implemented");
+        ProcessLaunch();
         break;
     default:
         break;
     }
 }
 
+void KeplerCompute::ProcessLaunch() {
+
+    const GPUVAddr launch_desc_loc = regs.launch_desc_loc.Address();
+    memory_manager.ReadBlockUnsafe(launch_desc_loc, &launch_description,
+                                   LaunchParams::NUM_LAUNCH_PARAMETERS * sizeof(u32));
+
+    const GPUVAddr code_loc = regs.code_loc.Address() + launch_description.program_start;
+    LOG_WARNING(HW_GPU, "Compute Kernel Execute at Address 0x{:016x}, STUBBED", code_loc);
+}
+
 } // namespace Tegra::Engines
diff --git a/src/video_core/engines/kepler_compute.h b/src/video_core/engines/kepler_compute.h
index fb6cdf432..ab2781b4b 100644
--- a/src/video_core/engines/kepler_compute.h
+++ b/src/video_core/engines/kepler_compute.h
@@ -6,14 +6,25 @@
 
 #include <array>
 #include <cstddef>
+#include <vector>
+#include "common/bit_field.h"
 #include "common/common_funcs.h"
 #include "common/common_types.h"
+#include "video_core/engines/engine_upload.h"
 #include "video_core/gpu.h"
 
+namespace Core {
+class System;
+}
+
 namespace Tegra {
 class MemoryManager;
 }
 
+namespace VideoCore {
+class RasterizerInterface;
+}
+
 namespace Tegra::Engines {
 
 #define KEPLER_COMPUTE_REG_INDEX(field_name)                                                       \
@@ -21,7 +32,8 @@ namespace Tegra::Engines {
 
 class KeplerCompute final {
 public:
-    explicit KeplerCompute(MemoryManager& memory_manager);
+    explicit KeplerCompute(Core::System& system, VideoCore::RasterizerInterface& rasterizer,
+                           MemoryManager& memory_manager);
     ~KeplerCompute();
 
     static constexpr std::size_t NumConstBuffers = 8;
@@ -31,30 +43,183 @@ public:
 
         union {
             struct {
-                INSERT_PADDING_WORDS(0xAF);
+                INSERT_PADDING_WORDS(0x60);
+
+                Upload::Data upload;
+
+                struct {
+                    union {
+                        BitField<0, 1, u32> linear;
+                    };
+                } exec_upload;
+
+                u32 data_upload;
+
+                INSERT_PADDING_WORDS(0x3F);
+
+                struct {
+                    u32 address;
+                    GPUVAddr Address() const {
+                        return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address) << 8));
+                    }
+                } launch_desc_loc;
+
+                INSERT_PADDING_WORDS(0x1);
 
                 u32 launch;
 
-                INSERT_PADDING_WORDS(0xC48);
+                INSERT_PADDING_WORDS(0x4A7);
+
+                struct {
+                    u32 address_high;
+                    u32 address_low;
+                    u32 limit;
+                    GPUVAddr Address() const {
+                        return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address_high) << 32) |
+                                                     address_low);
+                    }
+                } tsc;
+
+                INSERT_PADDING_WORDS(0x3);
+
+                struct {
+                    u32 address_high;
+                    u32 address_low;
+                    u32 limit;
+                    GPUVAddr Address() const {
+                        return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address_high) << 32) |
+                                                     address_low);
+                    }
+                } tic;
+
+                INSERT_PADDING_WORDS(0x22);
+
+                struct {
+                    u32 address_high;
+                    u32 address_low;
+                    GPUVAddr Address() const {
+                        return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address_high) << 32) |
+                                                     address_low);
+                    }
+                } code_loc;
+
+                INSERT_PADDING_WORDS(0x3FE);
+
+                u32 texture_const_buffer_index;
+
+                INSERT_PADDING_WORDS(0x374);
             };
             std::array<u32, NUM_REGS> reg_array;
         };
     } regs{};
+
+    struct LaunchParams {
+        static constexpr std::size_t NUM_LAUNCH_PARAMETERS = 0x40;
+
+        INSERT_PADDING_WORDS(0x8);
+
+        u32 program_start;
+
+        INSERT_PADDING_WORDS(0x2);
+
+        BitField<30, 1, u32> linked_tsc;
+
+        BitField<0, 31, u32> grid_dim_x;
+
+        union {
+            BitField<0, 16, u32> grid_dim_y;
+            BitField<16, 16, u32> grid_dim_z;
+        };
+
+        INSERT_PADDING_WORDS(0x3);
+
+        BitField<0, 16, u32> shared_alloc;
+
+        BitField<0, 31, u32> block_dim_x;
+
+        union {
+            BitField<0, 16, u32> block_dim_y;
+            BitField<16, 16, u32> block_dim_z;
+        };
+
+        union {
+            BitField<0, 8, u32> const_buffer_enable_mask;
+            BitField<29, 2, u32> cache_layout;
+        } memory_config;
+
+        INSERT_PADDING_WORDS(0x8);
+
+        struct {
+            u32 address_low;
+            union {
+                BitField<0, 8, u32> address_high;
+                BitField<15, 17, u32> size;
+            };
+            GPUVAddr Address() const {
+                return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address_high.Value()) << 32) |
+                                             address_low);
+            }
+        } const_buffer_config[8];
+
+        union {
+            BitField<0, 20, u32> local_pos_alloc;
+            BitField<27, 5, u32> barrier_alloc;
+        };
+
+        union {
+            BitField<0, 20, u32> local_neg_alloc;
+            BitField<24, 5, u32> gpr_alloc;
+        };
+
+        INSERT_PADDING_WORDS(0x11);
+    } launch_description;
+
+    struct {
+        u32 write_offset = 0;
+        u32 copy_size = 0;
+        std::vector<u8> inner_buffer;
+    } state{};
+
     static_assert(sizeof(Regs) == Regs::NUM_REGS * sizeof(u32),
                   "KeplerCompute Regs has wrong size");
 
+    static_assert(sizeof(LaunchParams) == LaunchParams::NUM_LAUNCH_PARAMETERS * sizeof(u32),
+                  "KeplerCompute LaunchParams has wrong size");
+
     /// Write the value to the register identified by method.
     void CallMethod(const GPU::MethodCall& method_call);
 
 private:
+    Core::System& system;
+    VideoCore::RasterizerInterface& rasterizer;
     MemoryManager& memory_manager;
+    Upload::State upload_state;
+
+    void ProcessLaunch();
 };
 
 #define ASSERT_REG_POSITION(field_name, position)                                                  \
     static_assert(offsetof(KeplerCompute::Regs, field_name) == position * 4,                       \
                   "Field " #field_name " has invalid position")
 
+#define ASSERT_LAUNCH_PARAM_POSITION(field_name, position)                                         \
+    static_assert(offsetof(KeplerCompute::LaunchParams, field_name) == position * 4,               \
+                  "Field " #field_name " has invalid position")
+
+ASSERT_REG_POSITION(upload, 0x60);
+ASSERT_REG_POSITION(exec_upload, 0x6C);
+ASSERT_REG_POSITION(data_upload, 0x6D);
 ASSERT_REG_POSITION(launch, 0xAF);
+ASSERT_REG_POSITION(tsc, 0x557);
+ASSERT_REG_POSITION(tic, 0x55D);
+ASSERT_REG_POSITION(code_loc, 0x582);
+ASSERT_REG_POSITION(texture_const_buffer_index, 0x982);
+ASSERT_LAUNCH_PARAM_POSITION(program_start, 0x8);
+ASSERT_LAUNCH_PARAM_POSITION(grid_dim_x, 0xC);
+ASSERT_LAUNCH_PARAM_POSITION(shared_alloc, 0x11);
+ASSERT_LAUNCH_PARAM_POSITION(block_dim_x, 0x12);
+ASSERT_LAUNCH_PARAM_POSITION(memory_config, 0x14);
+ASSERT_LAUNCH_PARAM_POSITION(const_buffer_config, 0x1D);
 
 #undef ASSERT_REG_POSITION
 
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 9db6e4763..52706505b 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -35,7 +35,7 @@ GPU::GPU(Core::System& system, VideoCore::RendererBase& renderer) : renderer{ren
     dma_pusher = std::make_unique<Tegra::DmaPusher>(*this);
     maxwell_3d = std::make_unique<Engines::Maxwell3D>(system, rasterizer, *memory_manager);
     fermi_2d = std::make_unique<Engines::Fermi2D>(rasterizer, *memory_manager);
-    kepler_compute = std::make_unique<Engines::KeplerCompute>(*memory_manager);
+    kepler_compute = std::make_unique<Engines::KeplerCompute>(system, rasterizer, *memory_manager);
     maxwell_dma = std::make_unique<Engines::MaxwellDMA>(system, rasterizer, *memory_manager);
     kepler_memory = std::make_unique<Engines::KeplerMemory>(system, *memory_manager);
 }