| import torch |
|
|
| import lyco_helpers |
| import network |
| from modules import devices |
|
|
|
|
| class ModuleTypeLora(network.ModuleType): |
| def create_module(self, net: network.Network, weights: network.NetworkWeights): |
| if all(x in weights.w for x in ["lora_up.weight", "lora_down.weight"]): |
| return NetworkModuleLora(net, weights) |
|
|
| return None |
|
|
|
|
| class NetworkModuleLora(network.NetworkModule): |
| def __init__(self, net: network.Network, weights: network.NetworkWeights): |
| super().__init__(net, weights) |
|
|
| self.up_model = self.create_module(weights.w, "lora_up.weight") |
| self.down_model = self.create_module(weights.w, "lora_down.weight") |
| self.mid_model = self.create_module(weights.w, "lora_mid.weight", none_ok=True) |
|
|
| self.dim = weights.w["lora_down.weight"].shape[0] |
|
|
| def create_module(self, weights, key, none_ok=False): |
| weight = weights.get(key) |
|
|
| if weight is None and none_ok: |
| return None |
|
|
| is_linear = type(self.sd_module) in [torch.nn.Linear, torch.nn.modules.linear.NonDynamicallyQuantizableLinear, torch.nn.MultiheadAttention] |
| is_conv = type(self.sd_module) in [torch.nn.Conv2d] |
|
|
| if is_linear: |
| weight = weight.reshape(weight.shape[0], -1) |
| module = torch.nn.Linear(weight.shape[1], weight.shape[0], bias=False) |
| elif is_conv and key == "lora_down.weight" or key == "dyn_up": |
| if len(weight.shape) == 2: |
| weight = weight.reshape(weight.shape[0], -1, 1, 1) |
|
|
| if weight.shape[2] != 1 or weight.shape[3] != 1: |
| module = torch.nn.Conv2d(weight.shape[1], weight.shape[0], self.sd_module.kernel_size, self.sd_module.stride, self.sd_module.padding, bias=False) |
| else: |
| module = torch.nn.Conv2d(weight.shape[1], weight.shape[0], (1, 1), bias=False) |
| elif is_conv and key == "lora_mid.weight": |
| module = torch.nn.Conv2d(weight.shape[1], weight.shape[0], self.sd_module.kernel_size, self.sd_module.stride, self.sd_module.padding, bias=False) |
| elif is_conv and key == "lora_up.weight" or key == "dyn_down": |
| module = torch.nn.Conv2d(weight.shape[1], weight.shape[0], (1, 1), bias=False) |
| else: |
| raise AssertionError(f'Lora layer {self.network_key} matched a layer with unsupported type: {type(self.sd_module).__name__}') |
|
|
| with torch.no_grad(): |
| if weight.shape != module.weight.shape: |
| weight = weight.reshape(module.weight.shape) |
| module.weight.copy_(weight) |
|
|
| module.to(device=devices.cpu, dtype=devices.dtype) |
| module.weight.requires_grad_(False) |
|
|
| return module |
|
|
| def calc_updown(self, orig_weight): |
| up = self.up_model.weight.to(orig_weight.device, dtype=orig_weight.dtype) |
| down = self.down_model.weight.to(orig_weight.device, dtype=orig_weight.dtype) |
|
|
| output_shape = [up.size(0), down.size(1)] |
| if self.mid_model is not None: |
| |
| mid = self.mid_model.weight.to(orig_weight.device, dtype=orig_weight.dtype) |
| updown = lyco_helpers.rebuild_cp_decomposition(up, down, mid) |
| output_shape += mid.shape[2:] |
| else: |
| if len(down.shape) == 4: |
| output_shape += down.shape[2:] |
| updown = lyco_helpers.rebuild_conventional(up, down, output_shape, self.network.dyn_dim) |
|
|
| return self.finalize_updown(updown, orig_weight, output_shape) |
|
|
| def forward(self, x, y): |
| self.up_model.to(device=devices.device) |
| self.down_model.to(device=devices.device) |
|
|
| return y + self.up_model(self.down_model(x)) * self.multiplier() * self.calc_scale() |
|
|
|
|
|
|
