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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| target_sources( | ||
| mlx | ||
| PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/allocator.cpp | ||
| ${CMAKE_CURRENT_SOURCE_DIR}/copy.cpp | ||
| ${CMAKE_CURRENT_SOURCE_DIR}/metal.cpp | ||
| ${CMAKE_CURRENT_SOURCE_DIR}/primitives.cpp | ||
| ${CMAKE_CURRENT_SOURCE_DIR}/../no_metal/event.cpp) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| // Copyright © 2025 Apple Inc. | ||
|
|
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| #include "mlx/backend/webgpu/allocator.h" | ||
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| #include "mlx/array.h" | ||
| #include "mlx/backend/webgpu/utils.h" | ||
| #include "mlx/primitives.h" | ||
|
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| namespace mlx::core { | ||
|
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| namespace allocator { | ||
|
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| Allocator& allocator() { | ||
| return webgpu::allocator(); | ||
| } | ||
|
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| void* Buffer::raw_ptr() { | ||
| return static_cast<webgpu::DoubleBuffer*>(ptr_)->cpu_data(); | ||
| } | ||
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| } // namespace allocator | ||
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| namespace webgpu { | ||
|
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| DoubleBuffer::DoubleBuffer(size_t size) | ||
| : size_(size), cpu_data_(std::malloc(size)) {} | ||
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| DoubleBuffer::DoubleBuffer(betann::Device& device, Dtype dtype, size_t size) | ||
| : size_(size), | ||
| gpu_data_(device.CreateBuffer( | ||
| size * gpu_size_factor(dtype), | ||
| betann::BufferUsage::Storage | betann::BufferUsage::CopySrc)) {} | ||
|
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| DoubleBuffer::~DoubleBuffer() { | ||
| std::free(cpu_data_); | ||
| } | ||
|
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| WgpuAllocator::WgpuAllocator() : device_(webgpu::device(Device::gpu)) {} | ||
|
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| Buffer WgpuAllocator::malloc(size_t size, bool allow_swap) { | ||
| return Buffer(new DoubleBuffer(size)); | ||
| } | ||
|
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| void WgpuAllocator::free(Buffer buffer) { | ||
| delete static_cast<DoubleBuffer*>(buffer.ptr()); | ||
| } | ||
|
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| size_t WgpuAllocator::size(Buffer buffer) const { | ||
| return static_cast<DoubleBuffer*>(buffer.ptr())->size(); | ||
| } | ||
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| void WgpuAllocator::ensure_cpu_data(array& arr, const void* data) { | ||
| auto* dbuf = static_cast<DoubleBuffer*>(arr.buffer().ptr()); | ||
| if (dbuf->cpu_data() || dbuf->size() == 0) | ||
| return; | ||
| void* cpu_data = std::malloc(dbuf->size()); | ||
| size_t num_elements = dbuf->size() / arr.itemsize(); | ||
| switch (arr.dtype()) { | ||
| case int32: | ||
| case uint32: | ||
| case float16: | ||
| case float32: | ||
| std::memcpy(cpu_data, data, dbuf->size()); | ||
| break; | ||
| case bool_: | ||
| std::transform( | ||
| static_cast<const uint32_t*>(data), | ||
| static_cast<const uint32_t*>(data) + num_elements, | ||
| static_cast<bool*>(cpu_data), | ||
| [](uint32_t e) { return static_cast<bool>(e); }); | ||
| break; | ||
| case uint8: | ||
| std::transform( | ||
| static_cast<const uint32_t*>(data), | ||
| static_cast<const uint32_t*>(data) + num_elements, | ||
| static_cast<uint8_t*>(cpu_data), | ||
| [](uint32_t e) { return static_cast<uint8_t>(e); }); | ||
| break; | ||
| case uint16: | ||
| std::transform( | ||
| static_cast<const uint32_t*>(data), | ||
| static_cast<const uint32_t*>(data) + num_elements, | ||
| static_cast<uint16_t*>(cpu_data), | ||
| [](uint32_t e) { return static_cast<uint16_t>(e); }); | ||
| break; | ||
| case int8: | ||
| std::transform( | ||
| static_cast<const int32_t*>(data), | ||
| static_cast<const int32_t*>(data) + num_elements, | ||
| static_cast<int8_t*>(cpu_data), | ||
| [](int32_t e) { return static_cast<int8_t>(e); }); | ||
| break; | ||
| case int16: | ||
| std::transform( | ||
| static_cast<const int32_t*>(data), | ||
| static_cast<const int32_t*>(data) + num_elements, | ||
| static_cast<int16_t*>(cpu_data), | ||
| [](int32_t e) { return static_cast<int16_t>(e); }); | ||
| break; | ||
| default: | ||
| throw_unsupported_dtype_error(arr.dtype()); | ||
| } | ||
| dbuf->set_cpu_data(cpu_data); | ||
| } | ||
|
|
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| void WgpuAllocator::ensure_gpu_data(array& arr) { | ||
| auto* dbuf = static_cast<DoubleBuffer*>(arr.buffer().ptr()); | ||
| if (dbuf->gpu_data() || dbuf->size() == 0) | ||
| return; | ||
| size_t num_elements = dbuf->size() / arr.itemsize(); | ||
| switch (arr.dtype()) { | ||
| case int32: | ||
| case uint32: | ||
| case float16: | ||
| case float32: | ||
| dbuf->set_gpu_data( | ||
| device_.CreateBufferFromData(dbuf->cpu_data(), dbuf->size())); | ||
| break; | ||
| case bool_: | ||
| dbuf->set_gpu_data(device_.CreateBufferTransformTo<uint32_t>( | ||
| static_cast<bool*>(dbuf->cpu_data()), num_elements)); | ||
| break; | ||
| case uint8: | ||
| dbuf->set_gpu_data(device_.CreateBufferTransformTo<uint32_t>( | ||
| static_cast<uint8_t*>(dbuf->cpu_data()), num_elements)); | ||
| break; | ||
| case uint16: | ||
| dbuf->set_gpu_data(device_.CreateBufferTransformTo<uint32_t>( | ||
| static_cast<uint16_t*>(dbuf->cpu_data()), num_elements)); | ||
| break; | ||
| case int8: | ||
| dbuf->set_gpu_data(device_.CreateBufferTransformTo<int32_t>( | ||
| static_cast<int8_t*>(dbuf->cpu_data()), num_elements)); | ||
| break; | ||
| case int16: | ||
| dbuf->set_gpu_data(device_.CreateBufferTransformTo<int32_t>( | ||
| static_cast<int16_t*>(dbuf->cpu_data()), num_elements)); | ||
| break; | ||
| default: | ||
| throw_unsupported_dtype_error(arr.dtype()); | ||
| } | ||
| } | ||
|
|
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| Buffer WgpuAllocator::malloc_gpu(array& arr) { | ||
| return malloc_gpu(arr, arr.nbytes()); | ||
| } | ||
|
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| Buffer WgpuAllocator::malloc_gpu(array& arr, size_t size) { | ||
| return Buffer(new DoubleBuffer(device_, arr.dtype(), size)); | ||
| } | ||
|
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| WgpuAllocator& allocator() { | ||
| static WgpuAllocator allocator_; | ||
| return allocator_; | ||
| } | ||
|
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| betann::Device& device(mlx::core::Device) { | ||
| static betann::Device device; | ||
| return device; | ||
| } | ||
|
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| betann::Device& device(array& arr) { | ||
| return device(arr.primitive().device()); | ||
| } | ||
|
|
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| } // namespace webgpu | ||
|
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| namespace metal { | ||
|
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| size_t get_active_memory() { | ||
| return 0; | ||
| } | ||
| size_t get_peak_memory() { | ||
| return 0; | ||
| } | ||
| void reset_peak_memory() {} | ||
| size_t get_cache_memory() { | ||
| return 0; | ||
| } | ||
| size_t set_memory_limit(size_t, bool) { | ||
| return 0; | ||
| } | ||
| size_t set_cache_limit(size_t) { | ||
| return 0; | ||
| } | ||
| size_t set_wired_limit(size_t) { | ||
| return 0; | ||
| } | ||
|
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| std::unordered_map<std::string, std::variant<std::string, size_t>> | ||
| device_info() { | ||
| throw std::runtime_error("[webgpu::device_info] Not implemented"); | ||
| }; | ||
|
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| void clear_cache() {} | ||
|
|
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| } // namespace metal | ||
|
|
||
| } // namespace mlx::core |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // Copyright © 2025 Apple Inc. | ||
|
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| #pragma once | ||
|
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| #include "mlx/allocator.h" | ||
| #include "mlx/device.h" | ||
|
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| #include <betann/betann.h> | ||
|
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| namespace mlx::core { | ||
| class array; | ||
| struct Dtype; | ||
| } // namespace mlx::core | ||
|
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| namespace mlx::core::webgpu { | ||
|
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| using allocator::Buffer; | ||
|
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| // Holds data for both CPU and GPU. | ||
| class DoubleBuffer { | ||
| public: | ||
| // Allocates memory in CPU. | ||
| explicit DoubleBuffer(size_t size); | ||
| // Allocates memory in GPU. | ||
| DoubleBuffer(betann::Device& device, Dtype dtype, size_t size); | ||
|
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| ~DoubleBuffer(); | ||
|
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| void set_cpu_data(void* data) { | ||
| assert(!cpu_data_); | ||
| cpu_data_ = data; | ||
| } | ||
| void set_gpu_data(betann::Buffer buffer) { | ||
| gpu_data_ = std::move(buffer); | ||
| } | ||
|
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| void* cpu_data() const { | ||
| return cpu_data_; | ||
| } | ||
| const betann::Buffer& gpu_data() const { | ||
| return gpu_data_; | ||
| } | ||
|
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| size_t size() const { | ||
| return size_; | ||
| } | ||
|
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| private: | ||
| size_t size_; | ||
| void* cpu_data_ = nullptr; | ||
| betann::Buffer gpu_data_; | ||
| }; | ||
|
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| class WgpuAllocator : public allocator::Allocator { | ||
| public: | ||
| Buffer malloc(size_t size, bool allow_swap) override; | ||
| void free(Buffer buffer) override; | ||
| size_t size(Buffer buffer) const override; | ||
|
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| void ensure_cpu_data(array& arr, const void* data); | ||
| void ensure_gpu_data(array& arr); | ||
| Buffer malloc_gpu(array& arr); | ||
| Buffer malloc_gpu(array& arr, size_t size); | ||
|
|
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| private: | ||
| WgpuAllocator(); | ||
| friend WgpuAllocator& allocator(); | ||
|
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| betann::Device& device_; | ||
| }; | ||
|
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| WgpuAllocator& allocator(); | ||
|
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| betann::Device& device(mlx::core::Device); | ||
| betann::Device& device(array& arr); | ||
|
|
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| } // namespace mlx::core::webgpu |
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