Initial commit to add LoRA support

Remove dependency on LoRA worker class

First working version with simple example

Fixed BS>1 case

Fix in platform.py to avoid error due to missing vllm_config

Fix No LoRA case

Fix warmup with LoRA

Minor Cleanup

Disable HPU Graphs

Clean-up. Minor fixes

Signed-off-by: Vivek <[email protected]>

Author: vivekgoe

vllm_gaudi/lora/punica_wrapper/punica_hpu.py

@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+from typing import Optional, Union, final
+
+import torch
+from vllm_gaudi.extension.ops import (dispatch_bgmv_embedding,
+                                      dispatch_bgmv_linear)
+
+from vllm.lora.punica_wrapper.punica_base import PunicaWrapperBase
+
+
+@final
+class PunicaWrapperHPU(PunicaWrapperBase):
+
+    def __init__(self, max_num_batched_tokens: int, max_batches: int,
+                 device: Union[torch.device, str], **kwargs):
+        # Increasing max_num_batched_tokens by 3x to handle increase in
+        # tensor size due to padding.
+        # TODO: Need to check if this override is still required
+        PunicaWrapperBase.__init__(self, 3 * max_num_batched_tokens,
+                                   max_batches, device)
+
+    def add_lora_embedding(self,
+                           y: torch.Tensor,
+                           x: torch.Tensor,
+                           lora_b_stacked: torch.Tensor,
+                           add_inputs: bool = True,
+                           **kwargs) -> None:
+        dispatch_bgmv_embedding(y, x, lora_b_stacked, 0)
+
+    def add_lora_linear(self,
+                        y: torch.Tensor,
+                        x: torch.Tensor,
+                        lora_a_stacked: tuple[torch.Tensor, ...],
+                        lora_b_stacked: tuple[torch.Tensor, ...],
+                        lora_bias_stacked: Optional[tuple[torch.Tensor, ...]],
+                        scale: float,
+                        output_slices: tuple[int, ...],
+                        *,
+                        buffer: Optional[tuple[torch.Tensor, ...]] = None,
+                        **kwargs) -> None:
+        x = x.view(-1, x.shape[-1])
+        offset_left = 0
+
+        for slice_idx in range(len(output_slices)):
+            dispatch_bgmv_linear(
+                y[:, offset_left:offset_left + output_slices[slice_idx]], x,
+                lora_a_stacked[slice_idx], lora_b_stacked[slice_idx], 0, scale)
+            offset_left += output_slices[slice_idx]
+
+    def add_lora_logits(self,
+                        y: torch.Tensor,
+                        x: torch.Tensor,
+                        lora_a_stacked: torch.Tensor,
+                        lora_b_stacked: torch.Tensor,
+                        scale,
+                        *,
+                        buffer: Optional[torch.Tensor] = None,
+                        **kwargs) -> None:
+        y_org = y
+        y = y.view(-1, y.shape[-1])
+        x = x.view(-1, x.shape[-1])
+        dispatch_bgmv_linear(y, x, lora_a_stacked, lora_b_stacked, 0, scale)
+        y = y.view_as(y_org)
+
+    def add_shrink(
+        self,
+        y: Union[tuple[torch.Tensor, ...], torch.Tensor],
+        x: torch.Tensor,
+        lora_a_stacked: tuple[torch.Tensor, ...],
+        scale: float,
+        **kwargs,
+    ) -> None:
+        raise NotImplementedError
+
+    def add_expand(
+        self,
+        y: torch.Tensor,
+        x: Union[tuple[torch.Tensor, ...], torch.Tensor],
+        lora_b_stacked: tuple[torch.Tensor, ...],
+        lora_bias_stacked: Optional[tuple[torch.Tensor, ...]],
+        output_slices: tuple[int, ...],
+        offset_start: int = 0,
+        add_inputs=True,
+        **kwargs,
+    ) -> None:
+        raise NotImplementedError

vllm_gaudi/platform.py

@@ -93,11 +93,18 @@ def check_and_update_config(cls, vllm_config: VllmConfig) -> None:
                     "VLLM_WORKER_MULTIPROC_METHOD=fork explicitly.")
                 os.environ["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"
 
-        if vllm_config.model_config.dtype in (torch.float16, torch.float32):
+        model_config = vllm_config.model_config
+        if model_config is not None and model_config.dtype in (torch.float16,
+                                                               torch.float32):
+            logger.warning(
+                "The TPU backend currently does not support %s. "
+                "Using bfloat16 instead.", model_config.dtype)
+            model_config.dtype = torch.bfloat16
+        '''if vllm_config.model_config.dtype in (torch.float16, torch.float32):
             logger.warning(
                 "The TPU backend currently does not support %s. "
                 "Using bfloat16 instead.", vllm_config.model_config.dtype)
-            vllm_config.model_config.dtype = torch.bfloat16
+            vllm_config.model_config.dtype = torch.bfloat16'''
 
         if envs.VLLM_USE_V1:
             from vllm.config import CompilationLevel