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45 lines
3.0 KiB
45 lines
3.0 KiB
import numpy as np
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import functools
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from wgpu.utils._device import get_default_device # type: ignore
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from tinygrad.runtime.lib import RawBufferCopyIn, LRUAllocator
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from tinygrad.helpers import dtypes, DType
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from tinygrad.ops import Compiled
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from tinygrad.codegen.kernel import LinearizerOptions
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from tinygrad.renderer.cstyle import uops_to_cstyle
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from tinygrad.renderer.wgsl import WGSLLanguage
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import wgpu # type: ignore
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wgpu_device = get_default_device()
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class WebGPUProgram:
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def __init__(self, name: str, prg: str): self.name,self.prg = name,wgpu_device.create_shader_module(code=prg)
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def __call__(self, *bufs, global_size, local_size, wait=False):
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assert len(bufs) <= 8, "WEBGPU only supports 8 buffers"
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binding_layouts = [{"binding": i, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}} for i in range(len(bufs))]
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bindings = [{"binding": i, "resource": {"buffer": x._buf, "offset": 0, "size": x._buf.size}} for i, x in enumerate(bufs)]
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bind_group_layout = wgpu_device.create_bind_group_layout(entries=binding_layouts)
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pipeline_layout = wgpu_device.create_pipeline_layout(bind_group_layouts=[bind_group_layout])
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bind_group = wgpu_device.create_bind_group(layout=bind_group_layout, entries=bindings)
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compute_pipeline = wgpu_device.create_compute_pipeline(layout=pipeline_layout,compute={"module": self.prg, "entry_point": self.name},)
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command_encoder = wgpu_device.create_command_encoder()
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compute_pass = command_encoder.begin_compute_pass()
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compute_pass.set_pipeline(compute_pipeline)
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compute_pass.set_bind_group(0, bind_group, [], 0, 999999) # last 2 not used
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compute_pass.dispatch_workgroups(*global_size) # x y z
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compute_pass.end()
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wgpu_device.queue.submit([command_encoder.finish()])
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class RawWebGPUAllocator(LRUAllocator):
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def _do_alloc(self, size, dtype, device, **kwargs): return wgpu_device.create_buffer(size=size*dtype.itemsize, usage=wgpu.BufferUsage.STORAGE | wgpu.BufferUsage.COPY_DST | wgpu.BufferUsage.COPY_SRC)
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def _cached_bufkey(self, size, dtype, device): return (device, size*dtype.itemsize) # Buffers of the same length could be reused, no matter what dtype.
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WebGPUAlloc = RawWebGPUAllocator(wgpu_device.limits['max_buffer_size'])
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class RawWebGPUBuffer(RawBufferCopyIn):
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def __init__(self, size:int, dtype:DType):
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assert dtype not in [dtypes.int8,dtypes.uint8,dtypes.int64,dtypes.uint64,dtypes.double], f"dtype {dtype} not supported on WEBGPU"
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super().__init__(size, dtype, allocator=WebGPUAlloc)
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def _copyin(self, x:np.ndarray): wgpu_device.queue.write_buffer(self._buf, 0, np.ascontiguousarray(x))
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def toCPU(self) -> np.ndarray: return np.frombuffer(wgpu_device.queue.read_buffer(self._buf, 0), dtype=np.dtype(self.dtype.np, metadata={"backing": self})) # type: ignore
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renderer = functools.partial(uops_to_cstyle, WGSLLanguage())
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WebGpuBuffer = Compiled(RawWebGPUBuffer, LinearizerOptions(device="WEBGPU", supports_float4=False, local_max=[256, 256, 64], global_max=[65535, 65535, 65535]), renderer, lambda x: x, WebGPUProgram)
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