Refactor model class. Add LLaMa support (LLaMa-2, Vicuna, etc).

awq/models/__init__.py

 from .mpt import MptAWQForCausalLM
+from .llama import LlamaAWQForCausalLM
\ No newline at end of file

awq/models/auto.py

 from transformers import AutoConfig
-from awq.models import MptAWQForCausalLM
+from awq.models import *
 from awq.models.base import BaseAWQForCausalLM
 
 AWQ_CAUSAL_LM_MODEL_MAP = {
     "mpt": MptAWQForCausalLM,
+    'llama': LlamaAWQForCausalLM
 }
 
 def check_and_get_model_type(model_dir, trust_remote_code=True):

awq/models/base.py

@@ -270,13 +270,13 @@ class BaseAWQForCausalLM:
     
     @staticmethod
     def _scale_activations(self, layer):
-        act_function = self.get_act_from_layer(layer)
+        scale_dict = self.get_act_for_scaling(layer)
 
-        if act_function is not None and not isinstance(act_function, ScaledActivation):
+        if scale_dict['is_scalable']:
+            if not isinstance(scale_dict['scale_layer'], ScaledActivation):
                 param = next(layer.parameters())
 
                 # get activation scale
-            scale_dict = self.get_act_for_scaling(layer)
                 scale_like = torch.ones(scale_dict['scale_shape'], dtype=param.dtype, device=param.device)
 
                 # scale activation

awq/models/llama.py

+from .base import BaseAWQForCausalLM
+from transformers.models.llama.modeling_llama import LlamaDecoderLayer, LlamaForCausalLM
+
+class LlamaAWQForCausalLM(BaseAWQForCausalLM):
+    layer_type = "LlamaDecoderLayer"
+
+    @staticmethod
+    def get_model_layers(model: LlamaForCausalLM):
+        return model.model.layers
+    
+    @staticmethod
+    def get_act_for_scaling(module: LlamaDecoderLayer):
+        return dict(
+            is_scalable=False
+        )
+    
+    @staticmethod
+    def move_embed(model: LlamaForCausalLM, device: str):
+        model.model.embed_tokens = model.model.embed_tokens.to(device)
+    
+    @staticmethod
+    def get_layers_for_scaling(module: LlamaDecoderLayer, input_feat, module_kwargs):
+        layers = []
+
+        # attention input
+        layers.append(dict(
+            prev_op=module.input_layernorm,
+            layers=[module.self_attn.q_proj,
+                    module.self_attn.k_proj, module.self_attn.v_proj],
+            inp=input_feat['self_attn.q_proj'],
+            module2inspect=module.self_attn, kwargs=module_kwargs,
+        ))
+
+        # attention out
+        # Please refer to https://github.com/mit-han-lab/llm-awq/pull/67#issue-1850622696
+        if module.self_attn.v_proj.weight.shape == module.self_attn.o_proj.weight.shape:
+            layers.append(dict(
+                prev_op=module.self_attn.v_proj,
+                layers=[module.self_attn.o_proj],
+                inp=input_feat['self_attn.o_proj'],
+            ))
+        # fc1
+        layers.append(dict(
+            prev_op=module.post_attention_layernorm,
+            layers=[module.mlp.gate_proj, module.mlp.up_proj],
+            inp=input_feat['mlp.gate_proj'],
+            module2inspect=module.mlp,
+        ))
+        # fc2
+        layers.append(dict(
+            prev_op=module.mlp.up_proj,
+            layers=[module.mlp.down_proj],
+            inp=input_feat['mlp.down_proj'],
+        ))
+
+        return layers
\ No newline at end of file

awq/models/mpt.py

@@ -7,6 +7,20 @@ class MptAWQForCausalLM(BaseAWQForCausalLM):
     def get_model_layers(model):
         return model.transformer.blocks
     
+    @staticmethod
+    def get_act_for_scaling(module):
+        return dict(
+            is_scalable=True,
+            scale_name="ffn.act",
+            scale_layer=module.ffn.act,
+            scale_shape=module.ffn.up_proj.out_features
+        )
+    
+    @staticmethod
+    def move_embed(model, device):
+        model.transformer.wte = model.transformer.wte.to(device)
+        model.transformer.emb_drop = model.transformer.emb_drop.to(device)
+    
     @staticmethod
     def get_layers_for_scaling(module, input_feat, module_kwargs):
         layers = []
@@ -43,20 +57,3 @@ class MptAWQForCausalLM(BaseAWQForCausalLM):
         ))
 
         return layers
\ No newline at end of file
-    
-    @staticmethod
-    def get_act_from_layer(layer):
-        return layer.ffn.act
-    
-    @staticmethod
-    def get_act_for_scaling(module):
-        return dict(
-            scale_name="ffn.act",
-            scale_layer=module.ffn.act,
-            scale_shape=module.ffn.up_proj.out_features
-        )
-    
-    @staticmethod
-    def move_embed(model, device):
-        model.transformer.wte = model.transformer.wte.to(device)
-        model.transformer.emb_drop = model.transformer.emb_drop.to(device)
\ No newline at end of file