Adding all project files

venv/Lib/site-packages/transformers/models/deepseek_v2/__init__.py

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+# Copyright 2025 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from typing import TYPE_CHECKING
+
+from ...utils import _LazyModule
+from ...utils.import_utils import define_import_structure
+
+
+if TYPE_CHECKING:
+    from .configuration_deepseek_v2 import *
+    from .modeling_deepseek_v2 import *
+else:
+    import sys
+
+    _file = globals()["__file__"]
+    sys.modules[__name__] = _LazyModule(__name__, _file, define_import_structure(_file), module_spec=__spec__)

venv/Lib/site-packages/transformers/models/deepseek_v2/configuration_deepseek_v2.py

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+#                🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
+#           This file was automatically generated from src/transformers/models/deepseek_v2/modular_deepseek_v2.py.
+#               Do NOT edit this file manually as any edits will be overwritten by the generation of
+#             the file from the modular. If any change should be done, please apply the change to the
+#                          modular_deepseek_v2.py file directly. One of our CI enforces this.
+#                🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
+# coding=utf-8
+# Copyright 2025 HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from ...configuration_utils import PretrainedConfig
+from ...modeling_rope_utils import rope_config_validation
+
+
+class DeepseekV2Config(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`DeepseekV2Model`]. It is used to instantiate a DeepSeek
+    model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
+    defaults will yield a similar configuration to that of DeepSeek-V2-Lite" [deepseek-ai/DeepSeek-V2-Lite"](https://huggingface.co/deepseek-ai/DeepSeek-V2-Lite").
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 32000):
+            Vocabulary size of the DeepSeek model. Defines the number of different tokens that can be represented by the
+            `input_ids` passed when calling [`DeepseekV2Model`].
+        hidden_size (`int`, *optional*, defaults to 4096):
+            Dimension of the hidden representations.
+        intermediate_size (`int`, *optional*, defaults to 11008):
+            Dimension of the MLP representations.
+        num_hidden_layers (`int`, *optional*, defaults to 32):
+            Number of hidden layers in the Transformer decoder.
+        num_attention_heads (`int`, *optional*, defaults to 32):
+            Number of attention heads for each attention layer in the Transformer decoder.
+        num_key_value_heads (`int`, *optional*):
+            The number of key-value heads used to implement Grouped Query Attention (GQA). If
+            `num_key_value_heads=num_attention_heads`, the model will use Multi-Head Attention (MHA). If
+            `num_key_value_heads=1`, the model will use Multi-Query Attention (MQA). Otherwise, GQA is used.
+        hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
+            The non-linear activation function (function or string) in the decoder.
+        max_position_embeddings (`int`, *optional*, defaults to 2048):
+            The maximum sequence length that this model might ever be used with.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated normal initializer for initializing all weight matrices.
+        rms_norm_eps (`float`, *optional*, defaults to 1e-06):
+            The epsilon value used by the RMS normalization layers.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether or not the model should return the last key/value attentions (useful for inference optimization).
+        pad_token_id (`int`, *optional*):
+            Padding token ID.
+        bos_token_id (`int`, *optional*, defaults to 1):
+            Beginning-of-sequence token ID.
+        eos_token_id (`int`, *optional*, defaults to 2):
+            End-of-sequence token ID.
+        tie_word_embeddings (`bool`, *optional*, defaults to `False`):
+            Whether to tie input and output embeddings.
+        rope_theta (`float`, *optional*, defaults to 10000.0):
+            The base period of the Rotary Position Embeddings (RoPE).
+        rope_scaling (`Dict`, *optional*):
+            Configuration for scaling RoPE embeddings. Supports `linear` and `dynamic` scaling strategies.
+        attention_bias (`bool`, *optional*, defaults to `False`):
+            Whether to use a bias in the query, key, value, and output projection layers during self-attention.
+        attention_dropout (`float`, *optional*, defaults to 0.0):
+            The dropout probability applied to attention weights.
+        mlp_bias (`bool`, *optional*, defaults to `False`):
+            Whether to use a bias term in the MLP layers.
+        aux_loss_alpha (`float`, *optional*, defaults to 0.001):
+            Weight coefficient for auxiliary loss in Mixture of Experts (MoE) models.
+        first_k_dense_replace (`int`, *optional*, defaults to 0):
+            Number of dense layers in the shallow layers before switching to MoE layers.
+        kv_lora_rank (`int`, *optional*, defaults to 512):
+            Rank of the LoRA decomposition for key-value projections.
+        q_lora_rank (`int`, *optional*, defaults to 1536):
+            Rank of the LoRA decomposition for query projections.
+            Specifically, it determines the dimensionality to which the query (q) vectors are compressed before being expanded back to their original size.
+            It reduces computational overhead while maintaining model performance.
+        n_group (`int`, *optional*):
+            Number of groups for routed experts.
+        n_routed_experts (`int`, *optional*, defaults to 64):
+            Number of routed experts (None indicates a dense model).
+        n_shared_experts (`int`, *optional*, defaults to 2):
+            Number of shared experts (None indicates a dense model).
+        qk_nope_head_dim (`int`, *optional*, defaults to 128):
+            The head dimension for the QK (query-key) projections when using NOPE (Neural Operator Position Encoding).
+        qk_rope_head_dim (`int`, *optional*, defaults to 64):
+            The head dimension for QK projections when using RoPE.
+        routed_scaling_factor (`float`, *optional*, defaults to 1.0):
+            Scaling factor for routed experts in MoE models.
+        seq_aux (`bool`, *optional*, defaults to `True`):
+            Whether to compute the auxiliary loss for each individual sequence.
+        topk_group (`int`, *optional*):
+            Number of selected groups per token for expert selection.
+        topk_method (`str`, *optional*, defaults to `"greedy"`):
+            The method used for selecting top-k experts in the routed gate mechanism.
+        v_head_dim (`int`, *optional*, defaults to 128):
+            The dimension of value projections in the attention layers.
+        num_experts_per_tok (`int`, *optional*):
+            The number of experts selected per token. If `None`, the model behaves as a dense Transformer.
+        norm_topk_prob (`bool`, *optional*, defaults to `False`):
+            Whether to normalize the probability distribution over top-k selected experts.
+        moe_intermediate_size (`int`, *optional*, defaults to 1407):
+            Dimension of the MoE (Mixture of Experts) representations.
+
+    ```python
+    >>> from transformers import DeepseekV2Model, DeepseekV2Config
+    >>> # Initializing a DeepSeek-V2 style configuration
+    >>> configuration = DeepseekV2Config()
+    >>> # Accessing the model configuration
+    >>> model = DeepseekV2Model(configuration)
+    >>> print(model.config)
+    ```
+    """
+
+    model_type = "deepseek_v2"
+    keys_to_ignore_at_inference = ["past_key_values"]
+
+    base_model_tp_plan = {
+        "layers.*.self_attn.q_proj": "colwise",
+        "layers.*.self_attn.q_a_proj": "colwise",
+        "layers.*.self_attn.q_b_proj": "colwise",
+        "layers.*.self_attn.kv_b_proj": "colwise",
+        "layers.*.self_attn.o_proj": "rowwise",
+        "layers.*.mlp.gate_proj": "colwise",
+        "layers.*.mlp.up_proj": "colwise",
+        "layers.*.mlp.down_proj": "rowwise",
+    }
+    base_model_pp_plan = {
+        "embed_tokens": (["input_ids"], ["inputs_embeds"]),
+        "layers": (["hidden_states", "attention_mask"], ["hidden_states"]),
+        "norm": (["hidden_states"], ["hidden_states"]),
+    }
+
+    def __init__(
+        self,
+        vocab_size=32000,
+        hidden_size=4096,
+        intermediate_size=11008,
+        num_hidden_layers=32,
+        num_attention_heads=32,
+        num_key_value_heads=None,
+        hidden_act="silu",
+        max_position_embeddings=2048,
+        initializer_range=0.02,
+        rms_norm_eps=1e-6,
+        use_cache=True,
+        pad_token_id=None,
+        bos_token_id=1,
+        eos_token_id=2,
+        tie_word_embeddings=False,
+        rope_theta=10000.0,
+        rope_scaling=None,
+        attention_bias=False,
+        attention_dropout=0.0,
+        mlp_bias=False,
+        aux_loss_alpha=0.001,
+        first_k_dense_replace=0,
+        kv_lora_rank=512,
+        q_lora_rank=1536,
+        n_group=None,
+        n_routed_experts=64,
+        n_shared_experts=2,
+        qk_nope_head_dim=128,
+        qk_rope_head_dim=64,
+        routed_scaling_factor=1.0,
+        seq_aux=True,
+        topk_group=None,
+        topk_method="greedy",
+        v_head_dim=128,
+        num_experts_per_tok=None,
+        norm_topk_prob=False,
+        moe_intermediate_size=1407,
+        **kwargs,
+    ):
+        super().__init__(
+            pad_token_id=pad_token_id,
+            bos_token_id=bos_token_id,
+            eos_token_id=eos_token_id,
+            tie_word_embeddings=tie_word_embeddings,
+            **kwargs,
+        )
+        self.vocab_size = vocab_size
+        self.max_position_embeddings = max_position_embeddings
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+
+        # for backward compatibility
+        if num_key_value_heads is None:
+            num_key_value_heads = num_attention_heads
+
+        self.num_key_value_heads = num_key_value_heads
+        self.hidden_act = hidden_act
+        self.initializer_range = initializer_range
+        self.rms_norm_eps = rms_norm_eps
+        self.use_cache = use_cache
+        self.rope_theta = rope_theta
+        self.rope_scaling = rope_scaling
+        self.attention_bias = attention_bias
+        self.attention_dropout = attention_dropout
+        self.mlp_bias = mlp_bias
+        self.head_dim = qk_rope_head_dim
+        # Validate the correctness of rotary position embeddings parameters
+        # BC: if there is a 'type' field, copy it it to 'rope_type'.
+        if self.rope_scaling is not None and "type" in self.rope_scaling:
+            self.rope_scaling["rope_type"] = self.rope_scaling["type"]
+        rope_config_validation(self)
+        self.aux_loss_alpha = aux_loss_alpha
+        self.first_k_dense_replace = first_k_dense_replace
+        self.kv_lora_rank = kv_lora_rank
+        self.q_lora_rank = q_lora_rank
+        self.n_group = n_group
+        self.n_routed_experts = n_routed_experts
+        self.n_shared_experts = n_shared_experts
+        self.qk_nope_head_dim = qk_nope_head_dim
+        self.qk_rope_head_dim = qk_rope_head_dim
+        self.routed_scaling_factor = routed_scaling_factor
+        self.seq_aux = seq_aux
+        self.topk_group = topk_group
+        self.topk_method = topk_method
+        self.v_head_dim = v_head_dim
+        self.num_experts_per_tok = num_experts_per_tok
+        self.norm_topk_prob = norm_topk_prob
+        self.moe_intermediate_size = moe_intermediate_size
+
+
+__all__ = ["DeepseekV2Config"]

venv/Lib/site-packages/transformers/models/deepseek_v2/modeling_deepseek_v2.py

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+#                🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
+#           This file was automatically generated from src/transformers/models/deepseek_v2/modular_deepseek_v2.py.
+#               Do NOT edit this file manually as any edits will be overwritten by the generation of
+#             the file from the modular. If any change should be done, please apply the change to the
+#                          modular_deepseek_v2.py file directly. One of our CI enforces this.
+#                🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
+# coding=utf-8
+# Copyright 2025 HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import warnings
+from typing import Callable, Optional, Union
+
+import torch
+import torch.nn.functional as F
+from torch import nn
+
+from ...activations import ACT2FN
+from ...cache_utils import Cache, DynamicCache
+from ...generation import GenerationMixin
+from ...integrations import use_kernel_forward_from_hub
+from ...masking_utils import create_causal_mask
+from ...modeling_layers import GenericForSequenceClassification, GradientCheckpointingLayer
+from ...modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast
+from ...modeling_rope_utils import ROPE_INIT_FUNCTIONS, dynamic_rope_update
+from ...modeling_utils import ALL_ATTENTION_FUNCTIONS, PreTrainedModel
+from ...processing_utils import Unpack
+from ...utils import TransformersKwargs, auto_docstring, can_return_tuple
+from ...utils.generic import check_model_inputs
+from .configuration_deepseek_v2 import DeepseekV2Config
+
+
+class DeepseekV2MoEGate(nn.Module):
+    def __init__(self, config: DeepseekV2Config):
+        super().__init__()
+        self.config = config
+        self.top_k = config.num_experts_per_tok
+        self.num_experts = config.n_routed_experts
+        self.routed_scaling_factor = config.routed_scaling_factor
+        self.alpha = config.aux_loss_alpha
+        self.seq_aux = config.seq_aux
+        self.topk_method = config.topk_method
+        self.num_group = config.n_group
+        self.topk_group = config.topk_group
+
+        # topk selection algorithm
+        self.norm_topk_prob = config.norm_topk_prob
+        self.gating_dim = config.hidden_size
+        self.weight = nn.Parameter(torch.empty((self.num_experts, self.gating_dim)))
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        batch_size, seq_len, hidden_dim = hidden_states.shape
+        ### compute gating score
+        hidden_states = hidden_states.view(-1, hidden_dim)
+        logits = F.linear(hidden_states.type(torch.float32), self.weight.type(torch.float32), None)
+        scores = logits.softmax(dim=-1, dtype=torch.float32)
+
+        # select top-k experts
+        # greedy method is used for DeepSeek-V2-Lite
+        # group_limited_greedy for DeepSeek-V2 and DeepSeek-V2-Chat
+        if self.topk_method == "greedy":
+            topk_weight, topk_idx = torch.topk(scores, k=self.top_k, dim=-1, sorted=False)
+        elif self.topk_method == "group_limited_greedy":
+            group_scores = scores.view(batch_size * seq_len, self.num_group, -1).max(dim=-1).values  # [n, num_group]
+            group_idx = torch.topk(group_scores, k=self.topk_group, dim=-1, sorted=False)[1]  # [n, top_k_group]
+            group_mask = torch.zeros_like(group_scores)  # [n, num_group]
+            group_mask.scatter_(1, group_idx, 1)  # [n, num_group]
+            score_mask = (
+                group_mask.unsqueeze(-1)
+                .expand(batch_size * seq_len, self.num_group, self.num_experts // self.num_group)
+                .reshape(batch_size * seq_len, -1)
+            )  # [n, e]
+            tmp_scores = scores.masked_fill(~score_mask.bool(), 0.0)  # [n, e]
+            topk_weight, topk_idx = torch.topk(tmp_scores, k=self.top_k, dim=-1, sorted=False)
+
+        topk_weight = topk_weight * self.routed_scaling_factor
+        ### expert-level computation auxiliary loss
+        return topk_idx, topk_weight
+
+
+class DeepseekV2MoE(nn.Module):
+    """
+    A mixed expert module containing shared experts.
+    """
+
+    def __init__(self, config: DeepseekV2Config):
+        super().__init__()
+        self.config = config
+        self.num_experts_per_tok = config.num_experts_per_tok
+
+        self.experts = nn.ModuleList(
+            [
+                (DeepseekV2MLP(config, intermediate_size=config.moe_intermediate_size))
+                for _ in range(config.n_routed_experts)
+            ]
+        )
+        self.gate = DeepseekV2MoEGate(config)
+        if config.n_shared_experts is not None:
+            intermediate_size = config.moe_intermediate_size * config.n_shared_experts
+            self.shared_experts = DeepseekV2MLP(config=config, intermediate_size=intermediate_size)
+        self.ep_rank = 0
+        self.experts_per_rank = config.n_routed_experts
+
+    def moe(self, hidden_states: torch.Tensor, topk_ids: torch.Tensor, topk_weight: torch.Tensor) -> torch.Tensor:
+        cnts = topk_ids.new_zeros((topk_ids.shape[0], len(self.experts)))
+        cnts.scatter_(1, topk_ids, 1)
+        tokens_per_expert = cnts.sum(dim=0)
+        indicies = topk_ids.view(-1).argsort()
+        sorted_tokens = hidden_states[indicies // topk_ids.shape[1]]
+
+        # Process experts
+        outputs = []
+        start_idx = 0
+        for i, num_tokens in enumerate(tokens_per_expert):
+            if num_tokens == 0:
+                continue
+            end_idx = start_idx + num_tokens
+            expert = self.experts[i + self.ep_rank * self.experts_per_rank]
+            tokens_for_this_expert = sorted_tokens[start_idx:end_idx]
+            expert_out = expert(tokens_for_this_expert)
+            outputs.append(expert_out)
+            start_idx = end_idx
+
+        outs = torch.cat(outputs, dim=0) if outputs else sorted_tokens.new_empty(0)
+
+        # Reorder and combine outputs
+        new_x = torch.empty_like(outs)
+        new_x[indicies] = outs
+        hidden_states = (
+            new_x.view(*topk_ids.shape, -1)
+            .type(topk_weight.dtype)
+            .mul_(topk_weight.unsqueeze(dim=-1))
+            .sum(dim=1)
+            .type(new_x.dtype)
+        )
+        return hidden_states
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        residuals = hidden_states
+        orig_shape = hidden_states.shape
+        topk_indices, topk_weights = self.gate(hidden_states)
+        hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
+        hidden_states = self.moe(hidden_states, topk_indices, topk_weights).view(*orig_shape)
+        hidden_states = hidden_states + self.shared_experts(residuals)
+        return hidden_states
+
+
+class DeepseekV2MLP(nn.Module):
+    def __init__(self, config: DeepseekV2Config, hidden_size=None, intermediate_size=None):
+        super().__init__()
+        self.config = config
+        self.hidden_size = config.hidden_size if hidden_size is None else hidden_size
+        self.intermediate_size = config.intermediate_size if intermediate_size is None else intermediate_size
+        self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=config.mlp_bias)
+        self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=config.mlp_bias)
+        self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=config.mlp_bias)
+        self.act_fn = ACT2FN[config.hidden_act]
+
+    def forward(self, x):
+        down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
+        return down_proj
+
+
+@use_kernel_forward_from_hub("RMSNorm")
+class DeepseekV2RMSNorm(nn.Module):
+    def __init__(self, hidden_size, eps=1e-6):
+        """
+        DeepseekV2RMSNorm is equivalent to T5LayerNorm
+        """
+        super().__init__()
+        self.weight = nn.Parameter(torch.ones(hidden_size))
+        self.variance_epsilon = eps
+
+    def forward(self, hidden_states):
+        input_dtype = hidden_states.dtype
+        hidden_states = hidden_states.to(torch.float32)
+        variance = hidden_states.pow(2).mean(-1, keepdim=True)
+        hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
+        return self.weight * hidden_states.to(input_dtype)
+
+    def extra_repr(self):
+        return f"{tuple(self.weight.shape)}, eps={self.variance_epsilon}"
+
+
+class DeepseekV2RotaryEmbedding(nn.Module):
+    def __init__(self, config: DeepseekV2Config, device=None):
+        super().__init__()
+        # BC: "rope_type" was originally "type"
+        self.rope_type = (
+            config.rope_scaling.get("rope_type", config.rope_scaling.get("type"))
+            if config.rope_scaling is not None
+            else "default"
+        )
+
+        self.max_seq_len_cached = config.max_position_embeddings
+        self.original_max_seq_len = config.max_position_embeddings
+
+        self.config = config
+        self.rope_init_fn = ROPE_INIT_FUNCTIONS[self.rope_type]
+
+        inv_freq, self.attention_scaling = self.rope_init_fn(self.config, device)
+        self.register_buffer("inv_freq", inv_freq, persistent=False)
+        self.original_inv_freq = self.inv_freq
+
+    @torch.no_grad()
+    @dynamic_rope_update  # power user: used with advanced RoPE types (e.g. dynamic rope)
+    def forward(self, x, position_ids):
+        inv_freq_expanded = self.inv_freq[None, :, None].float().expand(position_ids.shape[0], -1, 1)
+        position_ids_expanded = position_ids[:, None, :].float()
+
+        device_type = x.device.type if isinstance(x.device.type, str) and x.device.type != "mps" else "cpu"
+        with torch.autocast(device_type=device_type, enabled=False):  # Force float32
+            freqs = (inv_freq_expanded.to(x.device) @ position_ids_expanded).transpose(1, 2)
+            freqs_cis = torch.polar(torch.ones_like(freqs), freqs)  # Convert to complex representation
+            freqs_cis = freqs_cis * self.attention_scaling
+
+        return freqs_cis
+
+
+def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
+    """
+    This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
+    num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
+    """
+    batch, num_key_value_heads, slen, head_dim = hidden_states.shape
+    if n_rep == 1:
+        return hidden_states
+    hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
+    return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
+
+
+def eager_attention_forward(
+    module: nn.Module,
+    query: torch.Tensor,
+    key: torch.Tensor,
+    value: torch.Tensor,
+    attention_mask: Optional[torch.Tensor],
+    scaling: float,
+    dropout: float = 0.0,
+    **kwargs: Unpack[TransformersKwargs],
+):
+    key_states = repeat_kv(key, module.num_key_value_groups)
+    value_states = repeat_kv(value, module.num_key_value_groups)
+
+    attn_weights = torch.matmul(query, key_states.transpose(2, 3)) * scaling
+    if attention_mask is not None:
+        causal_mask = attention_mask[:, :, :, : key_states.shape[-2]]
+        attn_weights = attn_weights + causal_mask
+
+    attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query.dtype)
+    attn_weights = nn.functional.dropout(attn_weights, p=dropout, training=module.training)
+    attn_output = torch.matmul(attn_weights, value_states)
+    attn_output = attn_output.transpose(1, 2).contiguous()
+
+    return attn_output, attn_weights
+
+
+def apply_rotary_emb(
+    xq: torch.Tensor,
+    xk: torch.Tensor,
+    freqs_cis: torch.Tensor,
+) -> tuple[torch.Tensor, torch.Tensor]:
+    xq_ = torch.view_as_complex(xq.float().reshape(*xq.shape[:-1], -1, 2))
+    xk_ = torch.view_as_complex(xk.float().reshape(*xk.shape[:-1], -1, 2))
+
+    # Broadcast to [1, 1, seq_len, dim // 2]
+    freqs_cis = freqs_cis.unsqueeze(1).to(xq_.device)
+
+    xq_out = torch.view_as_real(xq_ * freqs_cis).flatten(3).type_as(xq)
+    xk_out = torch.view_as_real(xk_ * freqs_cis).flatten(3).type_as(xk)
+    return xq_out, xk_out
+
+
+class DeepseekV2Attention(nn.Module):
+    """Multi-headed attention from 'Attention Is All You Need' paper"""
+
+    def __init__(self, config: DeepseekV2Config, layer_idx: Optional[int] = None):
+        super().__init__()
+        self.config = config
+        self.layer_idx = layer_idx
+        self.attention_dropout = config.attention_dropout
+        self.hidden_size = config.hidden_size
+        self.num_heads = config.num_attention_heads
+        self.head_dim = config.head_dim
+        self.max_position_embeddings = config.max_position_embeddings
+        self.rope_theta = config.rope_theta
+        self.q_lora_rank = config.q_lora_rank
+        self.qk_rope_head_dim = config.qk_rope_head_dim
+        self.kv_lora_rank = config.kv_lora_rank
+        self.v_head_dim = config.v_head_dim
+        self.qk_nope_head_dim = config.qk_nope_head_dim
+        self.qk_head_dim = config.qk_nope_head_dim + config.qk_rope_head_dim
+        self.num_key_value_groups = config.num_attention_heads // config.num_key_value_heads
+
+        self.is_causal = True
+
+        if self.q_lora_rank is None:
+            self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.qk_head_dim, bias=False)
+        else:
+            self.q_a_proj = nn.Linear(self.hidden_size, config.q_lora_rank, bias=config.attention_bias)
+            self.q_a_layernorm = DeepseekV2RMSNorm(config.q_lora_rank)
+            self.q_b_proj = nn.Linear(config.q_lora_rank, self.num_heads * self.qk_head_dim, bias=False)
+
+        self.kv_a_proj_with_mqa = nn.Linear(
+            self.hidden_size,
+            config.kv_lora_rank + config.qk_rope_head_dim,
+            bias=config.attention_bias,
+        )
+        self.kv_a_layernorm = DeepseekV2RMSNorm(config.kv_lora_rank)
+        self.kv_b_proj = nn.Linear(
+            config.kv_lora_rank,
+            self.num_heads * (self.qk_head_dim - self.qk_rope_head_dim + self.v_head_dim),
+            bias=False,
+        )
+
+        self.o_proj = nn.Linear(
+            self.num_heads * self.v_head_dim,
+            self.hidden_size,
+            bias=config.attention_bias,
+        )
+
+        self.scaling = self.qk_head_dim ** (-0.5)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        past_key_value: Optional[Cache] = None,
+        cache_position: Optional[torch.LongTensor] = None,
+        position_embeddings: Optional[tuple[torch.Tensor, torch.Tensor]] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        **kwargs,
+    ) -> tuple[torch.Tensor, Optional[torch.Tensor], Optional[tuple[torch.Tensor]]]:
+        if "padding_mask" in kwargs:
+            warnings.warn(
+                "Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
+            )
+        batch_size, seq_length = hidden_states.shape[:-1]
+        query_shape = (batch_size, seq_length, -1, self.qk_head_dim)
+        key_shape = (batch_size, seq_length, -1, self.qk_nope_head_dim + self.v_head_dim)
+
+        if self.q_lora_rank is None:
+            q = self.q_proj(hidden_states)
+        else:
+            q = self.q_b_proj(self.q_a_layernorm(self.q_a_proj(hidden_states)))
+        q = q.view(query_shape).transpose(1, 2)
+        q_nope, q_pe = torch.split(q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1)
+
+        compressed_kv = self.kv_a_proj_with_mqa(hidden_states)
+        k_nope, k_pe = torch.split(compressed_kv, [self.kv_lora_rank, self.qk_rope_head_dim], dim=-1)
+        k_nope = self.kv_b_proj(self.kv_a_layernorm(k_nope)).view(key_shape).transpose(1, 2)
+        k_nope, value_states = torch.split(k_nope, [self.qk_nope_head_dim, self.v_head_dim], dim=-1)
+
+        k_pe = k_pe.view(batch_size, 1, seq_length, self.qk_rope_head_dim)
+        q_pe, k_pe = apply_rotary_emb(q_pe, k_pe, position_embeddings.to(q_pe.device))
+
+        k_pe = k_pe.expand(*k_nope.shape[:-1], -1)
+        query_states = torch.cat((q_nope, q_pe), dim=-1)
+        key_states = torch.cat((k_nope, k_pe), dim=-1)
+
+        if past_key_value is not None:
+            # sin and cos are specific to RoPE models; cache_position needed for the static cache
+            cache_kwargs = {"cache_position": cache_position}
+            key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
+
+        if self.config._attn_implementation == "flash_attention_2" and self.qk_head_dim != self.v_head_dim:
+            value_states = F.pad(value_states, [0, self.qk_head_dim - self.v_head_dim])
+
+        attention_interface: Callable = eager_attention_forward
+        if self.config._attn_implementation != "eager":
+            attention_interface = ALL_ATTENTION_FUNCTIONS[self.config._attn_implementation]
+
+        attn_output, attn_weights = attention_interface(
+            self,
+            query_states,
+            key_states,
+            value_states,
+            attention_mask,
+            dropout=0.0 if not self.training else self.attention_dropout,
+            scaling=self.scaling,
+            **kwargs,
+        )
+
+        if self.config._attn_implementation == "flash_attention_2" and self.qk_head_dim != self.v_head_dim:
+            attn_output = attn_output[:, :, :, : self.v_head_dim]
+
+        attn_output = attn_output.reshape(batch_size, seq_length, -1).contiguous()
+        attn_output = self.o_proj(attn_output)
+        return attn_output, attn_weights
+
+
+class DeepseekV2DecoderLayer(GradientCheckpointingLayer):
+    def __init__(self, config: DeepseekV2Config, layer_idx: int):
+        super().__init__()
+        self.hidden_size = config.hidden_size
+
+        self.self_attn = DeepseekV2Attention(config=config, layer_idx=layer_idx)
+        self.mlp = DeepseekV2MoE(config) if layer_idx >= config.first_k_dense_replace else DeepseekV2MLP(config)
+
+        self.input_layernorm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.post_attention_layernorm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Cache] = None,
+        use_cache: Optional[bool] = False,
+        cache_position: Optional[torch.LongTensor] = None,
+        position_embeddings: Optional[tuple[torch.Tensor, torch.Tensor]] = None,  # necessary, but kept here for BC
+        **kwargs: Unpack[TransformersKwargs],
+    ) -> tuple[torch.Tensor]:
+        residual = hidden_states
+        hidden_states = self.input_layernorm(hidden_states)
+        # Self Attention
+        hidden_states, _ = self.self_attn(
+            hidden_states=hidden_states,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_value=past_key_value,
+            use_cache=use_cache,
+            cache_position=cache_position,
+            position_embeddings=position_embeddings,
+            **kwargs,
+        )
+        hidden_states = residual + hidden_states
+
+        # Fully Connected
+        residual = hidden_states
+        hidden_states = self.post_attention_layernorm(hidden_states)
+        hidden_states = self.mlp(hidden_states)
+        hidden_states = residual + hidden_states
+        return hidden_states
+
+
+@auto_docstring
+class DeepseekV2PreTrainedModel(PreTrainedModel):
+    config: DeepseekV2Config
+    base_model_prefix = "model"
+    supports_gradient_checkpointing = True
+    _no_split_modules = ["DeepseekV2DecoderLayer"]
+    _skip_keys_device_placement = ["past_key_values"]
+    _supports_flash_attn = True
+    _supports_sdpa = True
+    _supports_flex_attn = True
+
+    _can_compile_fullgraph = True
+    _supports_attention_backend = True
+    _can_record_outputs = {
+        "hidden_states": DeepseekV2DecoderLayer,
+        "attentions": DeepseekV2Attention,
+    }
+
+    def _init_weights(self, module):
+        super()._init_weights(module)
+        if isinstance(module, DeepseekV2MoEGate):
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+
+
+@auto_docstring
+class DeepseekV2Model(DeepseekV2PreTrainedModel):
+    def __init__(self, config: DeepseekV2Config):
+        super().__init__(config)
+        self.padding_idx = config.pad_token_id
+        self.vocab_size = config.vocab_size
+
+        self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
+        self.layers = nn.ModuleList(
+            [DeepseekV2DecoderLayer(config, layer_idx) for layer_idx in range(config.num_hidden_layers)]
+        )
+        self.norm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.rotary_emb = DeepseekV2RotaryEmbedding(config=config)
+        self.gradient_checkpointing = False
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    @check_model_inputs
+    @auto_docstring
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[Cache] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        cache_position: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        **kwargs: Unpack[TransformersKwargs],
+    ) -> BaseModelOutputWithPast:
+        if (input_ids is None) ^ (inputs_embeds is not None):
+            raise ValueError("You must specify exactly one of input_ids or inputs_embeds")
+
+        if inputs_embeds is None:
+            inputs_embeds: torch.Tensor = self.embed_tokens(input_ids)
+
+        if use_cache and past_key_values is None:
+            past_key_values = DynamicCache()
+
+        if cache_position is None:
+            past_seen_tokens = past_key_values.get_seq_length() if past_key_values is not None else 0
+            cache_position: torch.Tensor = torch.arange(
+                past_seen_tokens, past_seen_tokens + inputs_embeds.shape[1], device=inputs_embeds.device
+            )
+
+        if position_ids is None:
+            position_ids = cache_position.unsqueeze(0)
+
+        causal_mask = create_causal_mask(
+            config=self.config,
+            input_embeds=inputs_embeds,
+            attention_mask=attention_mask,
+            cache_position=cache_position,
+            past_key_values=past_key_values,
+            position_ids=position_ids,
+        )
+
+        hidden_states = inputs_embeds
+        position_embeddings = self.rotary_emb(hidden_states, position_ids)
+
+        for decoder_layer in self.layers[: self.config.num_hidden_layers]:
+            hidden_states = decoder_layer(
+                hidden_states,
+                attention_mask=causal_mask,
+                position_ids=position_ids,
+                past_key_value=past_key_values,
+                cache_position=cache_position,
+                position_embeddings=position_embeddings,
+                **kwargs,
+            )
+
+        hidden_states = self.norm(hidden_states)
+        return BaseModelOutputWithPast(
+            last_hidden_state=hidden_states,
+            past_key_values=past_key_values,
+        )
+
+
+@auto_docstring
+class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel, GenerationMixin):
+    _tied_weights_keys = ["lm_head.weight"]
+    _tp_plan = {"lm_head": "colwise_rep"}
+    _pp_plan = {"lm_head": (["hidden_states"], ["logits"])}
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.model = DeepseekV2Model(config)
+        self.vocab_size = config.vocab_size
+        self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def set_decoder(self, decoder):
+        self.model = decoder
+
+    def get_decoder(self):
+        return self.model
+
+    @can_return_tuple
+    @auto_docstring
+    def forward(
+        self,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[Cache] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        cache_position: Optional[torch.LongTensor] = None,
+        logits_to_keep: Union[int, torch.Tensor] = 0,
+        **kwargs: Unpack[TransformersKwargs],
+    ) -> CausalLMOutputWithPast:
+        r"""
+        Example:
+
+        ```python
+        >>> from transformers import AutoTokenizer, DeepseekV2ForCausalLM
+
+        >>> model = DeepseekV2ForCausalLM.from_pretrained("meta-deepseek_v2/DeepseekV2-2-7b-hf")
+        >>> tokenizer = AutoTokenizer.from_pretrained("meta-deepseek_v2/DeepseekV2-2-7b-hf")
+
+        >>> prompt = "Hey, are you conscious? Can you talk to me?"
+        >>> inputs = tokenizer(prompt, return_tensors="pt")
+
+        >>> # Generate
+        >>> generate_ids = model.generate(inputs.input_ids, max_length=30)
+        >>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
+        "Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
+        ```"""
+        outputs: BaseModelOutputWithPast = self.model(
+            input_ids=input_ids,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_values=past_key_values,
+            inputs_embeds=inputs_embeds,
+            use_cache=use_cache,
+            cache_position=cache_position,
+            **kwargs,
+        )
+
+        hidden_states = outputs.last_hidden_state
+        # Only compute necessary logits, and do not upcast them to float if we are not computing the loss
+        slice_indices = slice(-logits_to_keep, None) if isinstance(logits_to_keep, int) else logits_to_keep
+        logits = self.lm_head(hidden_states[:, slice_indices, :])
+
+        loss = None
+        if labels is not None:
+            loss = self.loss_function(logits=logits, labels=labels, vocab_size=self.config.vocab_size, **kwargs)
+
+        return CausalLMOutputWithPast(
+            loss=loss,
+            logits=logits,
+            past_key_values=outputs.past_key_values,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )
+
+
+class DeepseekV2ForSequenceClassification(GenericForSequenceClassification, DeepseekV2PreTrainedModel):
+    pass
+
+
+__all__ = [
+    "DeepseekV2PreTrainedModel",
+    "DeepseekV2Model",
+    "DeepseekV2ForCausalLM",
+    "DeepseekV2ForSequenceClassification",
+]

venv/Lib/site-packages/transformers/models/deepseek_v2/modular_deepseek_v2.py

@@ -0,0 +1,529 @@
+# coding=utf-8
+# Copyright 2025 HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import warnings
+from typing import Callable, Optional
+
+import torch
+import torch.nn.functional as F
+from torch import nn
+
+from ...cache_utils import Cache
+from ...modeling_utils import ALL_ATTENTION_FUNCTIONS
+from ...utils import (
+    logging,
+)
+from ..llama.configuration_llama import LlamaConfig
+from ..llama.modeling_llama import (
+    LlamaDecoderLayer,
+    LlamaForCausalLM,
+    LlamaForSequenceClassification,
+    LlamaMLP,
+    LlamaModel,
+    LlamaPreTrainedModel,
+    LlamaRMSNorm,
+    eager_attention_forward,
+)
+from ..llama4.modeling_llama4 import Llama4TextRotaryEmbedding
+
+
+logger = logging.get_logger(__name__)
+
+
+class DeepseekV2Config(LlamaConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`DeepseekV2Model`]. It is used to instantiate a DeepSeek
+    model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
+    defaults will yield a similar configuration to that of DeepSeek-V2-Lite" [deepseek-ai/DeepSeek-V2-Lite"](https://huggingface.co/deepseek-ai/DeepSeek-V2-Lite").
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        vocab_size (`int`, *optional*, defaults to 32000):
+            Vocabulary size of the DeepSeek model. Defines the number of different tokens that can be represented by the
+            `input_ids` passed when calling [`DeepseekV2Model`].
+        hidden_size (`int`, *optional*, defaults to 4096):
+            Dimension of the hidden representations.
+        intermediate_size (`int`, *optional*, defaults to 11008):
+            Dimension of the MLP representations.
+        num_hidden_layers (`int`, *optional*, defaults to 32):
+            Number of hidden layers in the Transformer decoder.
+        num_attention_heads (`int`, *optional*, defaults to 32):
+            Number of attention heads for each attention layer in the Transformer decoder.
+        num_key_value_heads (`int`, *optional*):
+            The number of key-value heads used to implement Grouped Query Attention (GQA). If
+            `num_key_value_heads=num_attention_heads`, the model will use Multi-Head Attention (MHA). If
+            `num_key_value_heads=1`, the model will use Multi-Query Attention (MQA). Otherwise, GQA is used.
+        hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
+            The non-linear activation function (function or string) in the decoder.
+        max_position_embeddings (`int`, *optional*, defaults to 2048):
+            The maximum sequence length that this model might ever be used with.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated normal initializer for initializing all weight matrices.
+        rms_norm_eps (`float`, *optional*, defaults to 1e-06):
+            The epsilon value used by the RMS normalization layers.
+        use_cache (`bool`, *optional*, defaults to `True`):
+            Whether or not the model should return the last key/value attentions (useful for inference optimization).
+        pad_token_id (`int`, *optional*):
+            Padding token ID.
+        bos_token_id (`int`, *optional*, defaults to 1):
+            Beginning-of-sequence token ID.
+        eos_token_id (`int`, *optional*, defaults to 2):
+            End-of-sequence token ID.
+        tie_word_embeddings (`bool`, *optional*, defaults to `False`):
+            Whether to tie input and output embeddings.
+        rope_theta (`float`, *optional*, defaults to 10000.0):
+            The base period of the Rotary Position Embeddings (RoPE).
+        rope_scaling (`Dict`, *optional*):
+            Configuration for scaling RoPE embeddings. Supports `linear` and `dynamic` scaling strategies.
+        attention_bias (`bool`, *optional*, defaults to `False`):
+            Whether to use a bias in the query, key, value, and output projection layers during self-attention.
+        attention_dropout (`float`, *optional*, defaults to 0.0):
+            The dropout probability applied to attention weights.
+        mlp_bias (`bool`, *optional*, defaults to `False`):
+            Whether to use a bias term in the MLP layers.
+        aux_loss_alpha (`float`, *optional*, defaults to 0.001):
+            Weight coefficient for auxiliary loss in Mixture of Experts (MoE) models.
+        first_k_dense_replace (`int`, *optional*, defaults to 0):
+            Number of dense layers in the shallow layers before switching to MoE layers.
+        kv_lora_rank (`int`, *optional*, defaults to 512):
+            Rank of the LoRA decomposition for key-value projections.
+        q_lora_rank (`int`, *optional*, defaults to 1536):
+            Rank of the LoRA decomposition for query projections.
+            Specifically, it determines the dimensionality to which the query (q) vectors are compressed before being expanded back to their original size.
+            It reduces computational overhead while maintaining model performance.
+        n_group (`int`, *optional*):
+            Number of groups for routed experts.
+        n_routed_experts (`int`, *optional*, defaults to 64):
+            Number of routed experts (None indicates a dense model).
+        n_shared_experts (`int`, *optional*, defaults to 2):
+            Number of shared experts (None indicates a dense model).
+        qk_nope_head_dim (`int`, *optional*, defaults to 128):
+            The head dimension for the QK (query-key) projections when using NOPE (Neural Operator Position Encoding).
+        qk_rope_head_dim (`int`, *optional*, defaults to 64):
+            The head dimension for QK projections when using RoPE.
+        routed_scaling_factor (`float`, *optional*, defaults to 1.0):
+            Scaling factor for routed experts in MoE models.
+        seq_aux (`bool`, *optional*, defaults to `True`):
+            Whether to compute the auxiliary loss for each individual sequence.
+        topk_group (`int`, *optional*):
+            Number of selected groups per token for expert selection.
+        topk_method (`str`, *optional*, defaults to `"greedy"`):
+            The method used for selecting top-k experts in the routed gate mechanism.
+        v_head_dim (`int`, *optional*, defaults to 128):
+            The dimension of value projections in the attention layers.
+        num_experts_per_tok (`int`, *optional*):
+            The number of experts selected per token. If `None`, the model behaves as a dense Transformer.
+        norm_topk_prob (`bool`, *optional*, defaults to `False`):
+            Whether to normalize the probability distribution over top-k selected experts.
+        moe_intermediate_size (`int`, *optional*, defaults to 1407):
+            Dimension of the MoE (Mixture of Experts) representations.
+
+    ```python
+    >>> from transformers import DeepseekV2Model, DeepseekV2Config
+    >>> # Initializing a DeepSeek-V2 style configuration
+    >>> configuration = DeepseekV2Config()
+    >>> # Accessing the model configuration
+    >>> model = DeepseekV2Model(configuration)
+    >>> print(model.config)
+    ```
+    """
+
+    base_model_tp_plan = {
+        "layers.*.self_attn.q_proj": "colwise",
+        "layers.*.self_attn.q_a_proj": "colwise",
+        "layers.*.self_attn.q_b_proj": "colwise",
+        "layers.*.self_attn.kv_b_proj": "colwise",
+        "layers.*.self_attn.o_proj": "rowwise",
+        "layers.*.mlp.gate_proj": "colwise",
+        "layers.*.mlp.up_proj": "colwise",
+        "layers.*.mlp.down_proj": "rowwise",
+    }
+
+    model_type = "deepseek_v2"
+    keys_to_ignore_at_inference = ["past_key_values"]
+
+    def __init__(
+        self,
+        vocab_size=32000,
+        hidden_size=4096,
+        intermediate_size=11008,
+        num_hidden_layers=32,
+        num_attention_heads=32,
+        num_key_value_heads=None,
+        hidden_act="silu",
+        max_position_embeddings=2048,
+        initializer_range=0.02,
+        rms_norm_eps=1e-6,
+        use_cache=True,
+        pad_token_id=None,
+        bos_token_id=1,
+        eos_token_id=2,
+        tie_word_embeddings=False,
+        rope_theta=10000.0,
+        rope_scaling=None,
+        attention_bias=False,
+        attention_dropout=0.0,
+        mlp_bias=False,
+        aux_loss_alpha=0.001,
+        first_k_dense_replace=0,
+        kv_lora_rank=512,
+        q_lora_rank=1536,
+        n_group=None,
+        n_routed_experts=64,
+        n_shared_experts=2,
+        qk_nope_head_dim=128,
+        qk_rope_head_dim=64,
+        routed_scaling_factor=1.0,
+        seq_aux=True,
+        topk_group=None,
+        topk_method="greedy",
+        v_head_dim=128,
+        num_experts_per_tok=None,
+        norm_topk_prob=False,
+        moe_intermediate_size=1407,
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+
+        del self.pretraining_tp
+        self.aux_loss_alpha = aux_loss_alpha
+        self.first_k_dense_replace = first_k_dense_replace
+        self.kv_lora_rank = kv_lora_rank
+        self.q_lora_rank = q_lora_rank
+        self.n_group = n_group
+        self.n_routed_experts = n_routed_experts
+        self.n_shared_experts = n_shared_experts
+        self.qk_nope_head_dim = qk_nope_head_dim
+        self.qk_rope_head_dim = qk_rope_head_dim
+        self.routed_scaling_factor = routed_scaling_factor
+        self.seq_aux = seq_aux
+        self.topk_group = topk_group
+        self.topk_method = topk_method
+        self.v_head_dim = v_head_dim
+        self.num_experts_per_tok = num_experts_per_tok
+        self.norm_topk_prob = norm_topk_prob
+        self.moe_intermediate_size = moe_intermediate_size
+        self.head_dim = qk_rope_head_dim
+
+
+def apply_rotary_emb(
+    xq: torch.Tensor,
+    xk: torch.Tensor,
+    freqs_cis: torch.Tensor,
+) -> tuple[torch.Tensor, torch.Tensor]:
+    xq_ = torch.view_as_complex(xq.float().reshape(*xq.shape[:-1], -1, 2))
+    xk_ = torch.view_as_complex(xk.float().reshape(*xk.shape[:-1], -1, 2))
+
+    # Broadcast to [1, 1, seq_len, dim // 2]
+    freqs_cis = freqs_cis.unsqueeze(1).to(xq_.device)
+
+    xq_out = torch.view_as_real(xq_ * freqs_cis).flatten(3).type_as(xq)
+    xk_out = torch.view_as_real(xk_ * freqs_cis).flatten(3).type_as(xk)
+    return xq_out, xk_out
+
+
+class DeepseekV2MoEGate(nn.Module):
+    def __init__(self, config: DeepseekV2Config):
+        super().__init__()
+        self.config = config
+        self.top_k = config.num_experts_per_tok
+        self.num_experts = config.n_routed_experts
+        self.routed_scaling_factor = config.routed_scaling_factor
+        self.alpha = config.aux_loss_alpha
+        self.seq_aux = config.seq_aux
+        self.topk_method = config.topk_method
+        self.num_group = config.n_group
+        self.topk_group = config.topk_group
+
+        # topk selection algorithm
+        self.norm_topk_prob = config.norm_topk_prob
+        self.gating_dim = config.hidden_size
+        self.weight = nn.Parameter(torch.empty((self.num_experts, self.gating_dim)))
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        batch_size, seq_len, hidden_dim = hidden_states.shape
+        ### compute gating score
+        hidden_states = hidden_states.view(-1, hidden_dim)
+        logits = F.linear(hidden_states.type(torch.float32), self.weight.type(torch.float32), None)
+        scores = logits.softmax(dim=-1, dtype=torch.float32)
+
+        # select top-k experts
+        # greedy method is used for DeepSeek-V2-Lite
+        # group_limited_greedy for DeepSeek-V2 and DeepSeek-V2-Chat
+        if self.topk_method == "greedy":
+            topk_weight, topk_idx = torch.topk(scores, k=self.top_k, dim=-1, sorted=False)
+        elif self.topk_method == "group_limited_greedy":
+            group_scores = scores.view(batch_size * seq_len, self.num_group, -1).max(dim=-1).values  # [n, num_group]
+            group_idx = torch.topk(group_scores, k=self.topk_group, dim=-1, sorted=False)[1]  # [n, top_k_group]
+            group_mask = torch.zeros_like(group_scores)  # [n, num_group]
+            group_mask.scatter_(1, group_idx, 1)  # [n, num_group]
+            score_mask = (
+                group_mask.unsqueeze(-1)
+                .expand(batch_size * seq_len, self.num_group, self.num_experts // self.num_group)
+                .reshape(batch_size * seq_len, -1)
+            )  # [n, e]
+            tmp_scores = scores.masked_fill(~score_mask.bool(), 0.0)  # [n, e]
+            topk_weight, topk_idx = torch.topk(tmp_scores, k=self.top_k, dim=-1, sorted=False)
+
+        topk_weight = topk_weight * self.routed_scaling_factor
+        ### expert-level computation auxiliary loss
+        return topk_idx, topk_weight
+
+
+class DeepseekV2MoE(nn.Module):
+    """
+    A mixed expert module containing shared experts.
+    """
+
+    def __init__(self, config: DeepseekV2Config):
+        super().__init__()
+        self.config = config
+        self.num_experts_per_tok = config.num_experts_per_tok
+
+        self.experts = nn.ModuleList(
+            [
+                (DeepseekV2MLP(config, intermediate_size=config.moe_intermediate_size))
+                for _ in range(config.n_routed_experts)
+            ]
+        )
+        self.gate = DeepseekV2MoEGate(config)
+        if config.n_shared_experts is not None:
+            intermediate_size = config.moe_intermediate_size * config.n_shared_experts
+            self.shared_experts = DeepseekV2MLP(config=config, intermediate_size=intermediate_size)
+        self.ep_rank = 0
+        self.experts_per_rank = config.n_routed_experts
+
+    def moe(self, hidden_states: torch.Tensor, topk_ids: torch.Tensor, topk_weight: torch.Tensor) -> torch.Tensor:
+        cnts = topk_ids.new_zeros((topk_ids.shape[0], len(self.experts)))
+        cnts.scatter_(1, topk_ids, 1)
+        tokens_per_expert = cnts.sum(dim=0)
+        indicies = topk_ids.view(-1).argsort()
+        sorted_tokens = hidden_states[indicies // topk_ids.shape[1]]
+
+        # Process experts
+        outputs = []
+        start_idx = 0
+        for i, num_tokens in enumerate(tokens_per_expert):
+            if num_tokens == 0:
+                continue
+            end_idx = start_idx + num_tokens
+            expert = self.experts[i + self.ep_rank * self.experts_per_rank]
+            tokens_for_this_expert = sorted_tokens[start_idx:end_idx]
+            expert_out = expert(tokens_for_this_expert)
+            outputs.append(expert_out)
+            start_idx = end_idx
+
+        outs = torch.cat(outputs, dim=0) if outputs else sorted_tokens.new_empty(0)
+
+        # Reorder and combine outputs
+        new_x = torch.empty_like(outs)
+        new_x[indicies] = outs
+        hidden_states = (
+            new_x.view(*topk_ids.shape, -1)
+            .type(topk_weight.dtype)
+            .mul_(topk_weight.unsqueeze(dim=-1))
+            .sum(dim=1)
+            .type(new_x.dtype)
+        )
+        return hidden_states
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        residuals = hidden_states
+        orig_shape = hidden_states.shape
+        topk_indices, topk_weights = self.gate(hidden_states)
+        hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
+        hidden_states = self.moe(hidden_states, topk_indices, topk_weights).view(*orig_shape)
+        hidden_states = hidden_states + self.shared_experts(residuals)
+        return hidden_states
+
+
+class DeepseekV2MLP(LlamaMLP):
+    def __init__(self, config: DeepseekV2Config, hidden_size=None, intermediate_size=None):
+        super().__init__(config)
+        self.hidden_size = config.hidden_size if hidden_size is None else hidden_size
+        self.intermediate_size = config.intermediate_size if intermediate_size is None else intermediate_size
+
+
+class DeepseekV2RMSNorm(LlamaRMSNorm):
+    pass
+
+
+class DeepseekV2RotaryEmbedding(Llama4TextRotaryEmbedding):
+    def __init__(self, config: DeepseekV2Config, device=None):
+        super().__init__(config=config, device=device)
+        # BC: "rope_type" was originally "type"
+        self.rope_type = (
+            config.rope_scaling.get("rope_type", config.rope_scaling.get("type"))
+            if config.rope_scaling is not None
+            else "default"
+        )
+
+
+class DeepseekV2Attention(nn.Module):
+    """Multi-headed attention from 'Attention Is All You Need' paper"""
+
+    def __init__(self, config: DeepseekV2Config, layer_idx: Optional[int] = None):
+        super().__init__()
+        self.config = config
+        self.layer_idx = layer_idx
+        self.attention_dropout = config.attention_dropout
+        self.hidden_size = config.hidden_size
+        self.num_heads = config.num_attention_heads
+        self.head_dim = config.head_dim
+        self.max_position_embeddings = config.max_position_embeddings
+        self.rope_theta = config.rope_theta
+        self.q_lora_rank = config.q_lora_rank
+        self.qk_rope_head_dim = config.qk_rope_head_dim
+        self.kv_lora_rank = config.kv_lora_rank
+        self.v_head_dim = config.v_head_dim
+        self.qk_nope_head_dim = config.qk_nope_head_dim
+        self.qk_head_dim = config.qk_nope_head_dim + config.qk_rope_head_dim
+        self.num_key_value_groups = config.num_attention_heads // config.num_key_value_heads
+
+        self.is_causal = True
+
+        if self.q_lora_rank is None:
+            self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.qk_head_dim, bias=False)
+        else:
+            self.q_a_proj = nn.Linear(self.hidden_size, config.q_lora_rank, bias=config.attention_bias)
+            self.q_a_layernorm = DeepseekV2RMSNorm(config.q_lora_rank)
+            self.q_b_proj = nn.Linear(config.q_lora_rank, self.num_heads * self.qk_head_dim, bias=False)
+
+        self.kv_a_proj_with_mqa = nn.Linear(
+            self.hidden_size,
+            config.kv_lora_rank + config.qk_rope_head_dim,
+            bias=config.attention_bias,
+        )
+        self.kv_a_layernorm = DeepseekV2RMSNorm(config.kv_lora_rank)
+        self.kv_b_proj = nn.Linear(
+            config.kv_lora_rank,
+            self.num_heads * (self.qk_head_dim - self.qk_rope_head_dim + self.v_head_dim),
+            bias=False,
+        )
+
+        self.o_proj = nn.Linear(
+            self.num_heads * self.v_head_dim,
+            self.hidden_size,
+            bias=config.attention_bias,
+        )
+
+        self.scaling = self.qk_head_dim ** (-0.5)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        past_key_value: Optional[Cache] = None,
+        cache_position: Optional[torch.LongTensor] = None,
+        position_embeddings: Optional[tuple[torch.Tensor, torch.Tensor]] = None,
+        position_ids: Optional[torch.Tensor] = None,
+        **kwargs,
+    ) -> tuple[torch.Tensor, Optional[torch.Tensor], Optional[tuple[torch.Tensor]]]:
+        if "padding_mask" in kwargs:
+            warnings.warn(
+                "Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
+            )
+        batch_size, seq_length = hidden_states.shape[:-1]
+        query_shape = (batch_size, seq_length, -1, self.qk_head_dim)
+        key_shape = (batch_size, seq_length, -1, self.qk_nope_head_dim + self.v_head_dim)
+
+        if self.q_lora_rank is None:
+            q = self.q_proj(hidden_states)
+        else:
+            q = self.q_b_proj(self.q_a_layernorm(self.q_a_proj(hidden_states)))
+        q = q.view(query_shape).transpose(1, 2)
+        q_nope, q_pe = torch.split(q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1)
+
+        compressed_kv = self.kv_a_proj_with_mqa(hidden_states)
+        k_nope, k_pe = torch.split(compressed_kv, [self.kv_lora_rank, self.qk_rope_head_dim], dim=-1)
+        k_nope = self.kv_b_proj(self.kv_a_layernorm(k_nope)).view(key_shape).transpose(1, 2)
+        k_nope, value_states = torch.split(k_nope, [self.qk_nope_head_dim, self.v_head_dim], dim=-1)
+
+        k_pe = k_pe.view(batch_size, 1, seq_length, self.qk_rope_head_dim)
+        q_pe, k_pe = apply_rotary_emb(q_pe, k_pe, position_embeddings.to(q_pe.device))
+
+        k_pe = k_pe.expand(*k_nope.shape[:-1], -1)
+        query_states = torch.cat((q_nope, q_pe), dim=-1)
+        key_states = torch.cat((k_nope, k_pe), dim=-1)
+
+        if past_key_value is not None:
+            # sin and cos are specific to RoPE models; cache_position needed for the static cache
+            cache_kwargs = {"cache_position": cache_position}
+            key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
+
+        if self.config._attn_implementation == "flash_attention_2" and self.qk_head_dim != self.v_head_dim:
+            value_states = F.pad(value_states, [0, self.qk_head_dim - self.v_head_dim])
+
+        attention_interface: Callable = eager_attention_forward
+        if self.config._attn_implementation != "eager":
+            attention_interface = ALL_ATTENTION_FUNCTIONS[self.config._attn_implementation]
+
+        attn_output, attn_weights = attention_interface(
+            self,
+            query_states,
+            key_states,
+            value_states,
+            attention_mask,
+            dropout=0.0 if not self.training else self.attention_dropout,
+            scaling=self.scaling,
+            **kwargs,
+        )
+
+        if self.config._attn_implementation == "flash_attention_2" and self.qk_head_dim != self.v_head_dim:
+            attn_output = attn_output[:, :, :, : self.v_head_dim]
+
+        attn_output = attn_output.reshape(batch_size, seq_length, -1).contiguous()
+        attn_output = self.o_proj(attn_output)
+        return attn_output, attn_weights
+
+
+class DeepseekV2DecoderLayer(LlamaDecoderLayer):
+    def __init__(self, config: DeepseekV2Config, layer_idx: int):
+        super().__init__(config, layer_idx)
+
+        self.self_attn = DeepseekV2Attention(config=config, layer_idx=layer_idx)
+        self.mlp = DeepseekV2MoE(config) if layer_idx >= config.first_k_dense_replace else DeepseekV2MLP(config)
+
+        self.input_layernorm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.post_attention_layernorm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+
+
+class DeepseekV2PreTrainedModel(LlamaPreTrainedModel):
+    def _init_weights(self, module):
+        LlamaPreTrainedModel._init_weights(module)
+        if isinstance(module, DeepseekV2MoEGate):
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+
+
+class DeepseekV2Model(LlamaModel):
+    pass
+
+
+class DeepseekV2ForCausalLM(LlamaForCausalLM):
+    pass
+
+
+class DeepseekV2ForSequenceClassification(LlamaForSequenceClassification):
+    pass
+
+
+__all__ = [
+    "DeepseekV2PreTrainedModel",
+    "DeepseekV2Model",
+    "DeepseekV2ForCausalLM",
+    "DeepseekV2ForSequenceClassification",
+    "DeepseekV2Config",
+]