wehub-resource-sync
95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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from abc import ABC, abstractmethod
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from collections.abc import Callable
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from dataclasses import dataclass
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import torch
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from vllm.model_executor.layers.quantization.utils import replace_parameter
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from vllm.scalar_type import ScalarType
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@dataclass
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class MPLinearLayerConfig:
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full_weight_shape: tuple[int, int] # [in, out]
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partition_weight_shape: tuple[int, int]
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weight_type: ScalarType
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act_type: torch.dtype
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group_size: int
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zero_points: bool
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has_g_idx: bool
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out_type: torch.dtype | None = None
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class MPLinearKernel(ABC):
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@classmethod
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@abstractmethod
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def get_min_capability(cls) -> int:
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raise NotImplementedError
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@classmethod
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@abstractmethod
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def can_implement(cls, c: MPLinearLayerConfig) -> tuple[bool, str | None]:
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raise NotImplementedError
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def __init__(
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self,
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c: MPLinearLayerConfig,
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w_q_param_name: str,
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w_s_param_name: str,
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w_zp_param_name: str | None = None,
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w_gidx_param_name: str | None = None,
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) -> None:
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assert self.can_implement(c)
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self.config = c
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self.w_q_name = w_q_param_name
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self.w_s_name = w_s_param_name
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if c.zero_points:
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assert w_zp_param_name is not None
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if c.has_g_idx:
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assert w_gidx_param_name is not None
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self.w_zp_name: str | None = w_zp_param_name
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self.w_gidx_name: str | None = w_gidx_param_name
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@abstractmethod
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def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
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raise NotImplementedError
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@abstractmethod
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def apply_weights(
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self,
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layer: torch.nn.Module,
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x: torch.Tensor,
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bias: torch.Tensor | None = None,
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) -> torch.Tensor:
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raise NotImplementedError
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def _transform_param(
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self, layer: torch.nn.Module, name: str | None, fn: Callable
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) -> None:
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if name is not None and getattr(layer, name, None) is not None:
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old_param = getattr(layer, name)
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new_param = fn(old_param)
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# replace the parameter with torch.nn.Parameter for TorchDynamo
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# compatibility
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replace_parameter(
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layer, name, torch.nn.Parameter(new_param.data, requires_grad=False)
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)
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def _get_weight_params(
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self, layer: torch.nn.Module
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) -> tuple[
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torch.Tensor, # w_q
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torch.Tensor, # w_s
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torch.Tensor | None, # w_zp,
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torch.Tensor | None, # w_gidx
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]:
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return (
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getattr(layer, self.w_q_name),
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getattr(layer, self.w_s_name),
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getattr(layer, self.w_zp_name or "", None),
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getattr(layer, self.w_gidx_name or "", None),
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)
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