Update patch doc (#4869)

Update patch doc. After this PR is merged, all the new patch PR should
update this doc as well.
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

vllm_ascend/patch/__init__.py

@@ -30,18 +30,9 @@
 # --------------------------------
 # * Platform Patch:
 # =================
-# ** File: platform/patch_distributed.py**
+# ** 1. File: platform/patch_distributed.py**
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-#   1. `vllm.config.ParallelConfig.get_next_dp_init_port`
-#    Why:
-#       vllm doesn't support get port from environment.
-#    How：
-#       Add the logic to get port from environment.
-#    Related PR (if no, explain why):
-#       Need a PR to vllm to support get port from environment.
-#    Future Plan:
-#       Remove those patch when vllm merged them
-#   2. `torch.distributed.all_reduce`, `torch.distributed.broadcast`
+#   1. `torch.distributed.all_reduce`, `torch.distributed.broadcast`
 #    Why:
 #       tensor alignment for 310p
 #    How：
@@ -51,21 +42,85 @@
 #    Future Plan:
 #       Find a better way to support tensor alignment for 310p without this patch.
 #
-# ** File: worker/patch_multimodal_merge.py**
+# ** 2. File: platform/patch_ec_connector.py**
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-#   1. `vllm.model_executor.models.utils._merge_multimodal_embeddings`
+#   1. `vllm.distributed.ec_transfer.ec_connector.shared_storage_connector.ECSharedStorageConnector.start_load_caches`
 #    Why:
-#       '_merge_multimodal_embeddings' func of vllm is incompatible with Ascend.
+#       it's hard code to cuda
 #    How：
-#       Replace with CPU operation that can be executed asynchronously.
+#       change the cuda to npu
 #    Related PR (if no, explain why):
-#       This is a bug by Ascend only. It can' be fixed in vLLM.
+#       https://github.com/vllm-project/vllm/pull/30225
 #    Future Plan:
-#       Identify this pattern in torch-npu and remove this patch.
+#       Remove this patch when vllm merges the PR.
+#
+# ** 3. File: platform/patch_mamba_config.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.models.config.HybridAttentionMambaModelConfig.verify_and_update_config`
+#    Why:
+#       block size is set to 16 in vLLM which is not supported by Ascend.
+#    How：
+#       Set block size to 128 on npu.
+#    Related PR (if no, explain why):
+#       we'll fix this in vLLM soon.
+#    Future Plan:
+#       Remove this patch when vLLM merges the PR.
+#
+# ** 4. File: platform/patch_multiproc_executor.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.v1.executor.multiproc_executor.MultiprocExecutor`
+#    Why:
+#       vLLM create child process with daemon=True, which doesn't work with EPLB case, since EPLB will create
+#       a new process which is not allowed by daemon=True.
+#    How：
+#       Set daemon=False in MultiprocExecutor.
+#    Related PR (if no, explain why):
+#       Find a way to support daemon=False in vLLM
+#    Future Plan:
+#       Remove this patch when vLLM fix the issue.
+#
+# ** 5. File: platform/patch_sched_yield.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.distributed.utils.USE_SCHED_YIELD`
+#    Why:
+#       os.sched_yield() doesn't work on Arm systems.
+#    How：
+#       avoid using os.sched_yield() on Arm systems.
+#    Related PR (if no, explain why):
+#       https://github.com/vllm-project/vllm/pull/30228
+#    Future Plan:
+#       Remove this patch when vLLM merge the PR.
+#
 #
 # * Worker Patch:
 # ===============
-# ** File: worker/patch_minicpm.py **
+#
+# ** 1. File: worker/patch_deepseek.py **
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `DeepseekV2Model.forward`
+#    Why:
+#       getattr(self.config, "llama_4_scaling", None) will raise AttributeError
+#       on npu with graph mode.
+#    How：
+#       catch the AttributeError and set llama_4_scaling to None.
+#    Related PR (if no, explain why):
+#       No, this is a bug in vLLM Ascend
+#    Future Plan:
+#       Find the root cause of this bug and fix it in vLLM Ascend.
+#
+# ** 2. File: worker/patch_distributed.py **
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.distributed.parallel_state.GroupCoordinator`
+#    Why:
+#       vllm doesn't support all_to_all for GroupCoordinator.
+#    How：
+#       Add all_to_all implementation for GroupCoordinator.
+#    Related PR (if no, explain why):
+#       No, we should use vlLM all2all manager to support all_to_all for npu.
+#    Future Plan:
+#       Remove this patch when the refactor of all2all manager is done.
+#
+# ** 3. File: worker/patch_minicpm.py **
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 #   1. `vllm.model_executor.models.minicpm.MiniCPMAttention.forward`
 #    Why:
@@ -79,32 +134,65 @@
 #    Future Plan:
 #       Keep this patch in vllm-ascend.
 #
-# ** File: worker/patch_distributed.py **
-# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-#   1. `vllm.distributed.parallel_state.GroupCoordinator`
-#   (1) __init__()
+# ** 4. File: worker/patch_multimodal_merge.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.models.utils._merge_multimodal_embeddings`
 #    Why:
-#       The original GroupCoordinator initialization lacks pg_options to generate new
-#       process group with customized options.
-#    How:
-#       Inject HCCL options during process group initialization.
-#    Related PR (if no, explain why):
-#       Need a PR to vllm to support a dictionary as input while initializing distributed
-#       environment (e.g., Dict[str, torch.distributed.ProcessGroupHCCL.Options])
-#       https://github.com/vllm-project/vllm/pull/25417
-#    Future Plan:
-#       Remove this patch when vllm merges this PR.
-#   (2) all_to_all()
-#    Why:
-#       vllm doesn't support all_to_all for GroupCoordinator.
+#       '_merge_multimodal_embeddings' func of vllm is incompatible with Ascend.
 #    How：
-#       Add all_to_all implementation for GroupCoordinator.
+#       Replace with CPU operation that can be executed asynchronously.
 #    Related PR (if no, explain why):
-#       Need a PR to vllm to support all_to_all for GroupCoordinator.
+#       This is a bug by Ascend only. It can' be fixed in vLLM.
 #    Future Plan:
-#       Remove this patch when vllm merged them.
+#       Identify this pattern in torch-npu and remove this patch.
 #
-# ** File: worker/patch_roberta.py **
+# ** 5. File: worker/patch_qwen2_5_omni.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.models.qwen2_5_omni_thinker.Qwen2_5OmniThinkerForConditionalGeneration`
+#    Why:
+#       we have ascend forward context which doesn't work with upstream.
+#    How：
+#       override forward_context in the model file
+#    Related PR (if no, explain why):
+#       This is a bug by Ascend only. we should drop set_ascend_forward_context
+#    Future Plan:
+#       Remove this patch once forward_context is refactor.
+#
+# ** 6. File: worker/patch_qwen2_5_vl.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.models.qwen2_5_vl.Qwen2_5_VLForConditionalGeneration`
+#    Why:
+#       we have ascend forward context which doesn't work with upstream.
+#    How：
+#       override forward_context in the model file
+#    Related PR (if no, explain why):
+#       This is a bug by Ascend only. we should drop set_ascend_forward_context
+#    Future Plan:
+#       Remove this patch once forward_context is refactor.
+#
+#   2. `vllm.model_executor.models.qwen2_vl.Qwen2VisionAttention.forward`
+#    Why:
+#       the attention is not custom ops
+#    How：
+#       make it to custom ops and pluggable
+#    Related PR (if no, explain why):
+#       https://github.com/vllm-project/vllm/pull/30125
+#    Future Plan:
+#       Remove this patch one the PR is merged into vLLM.
+#
+# ** 7. File: worker/patch_qwen3_vl.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.models.qwen3_vl.Qwen3_VisionTransformer.forward`
+#    Why:
+#       the attention is not custom ops
+#    How：
+#       make it to custom ops and pluggable
+#    Related PR (if no, explain why):
+#       https://github.com/vllm-project/vllm/pull/30125
+#    Future Plan:
+#       Remove this patch one the PR is merged into vLLM.
+#
+# ** 8. File: worker/patch_roberta.py **
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 #   1. `vllm.model_executor.models.bert `
 #    Why:
@@ -116,18 +204,29 @@
 #    Future Plan:
 #       Revert this when CANN support shift aclnn operation
 #
-# ** File: worker/patch_deepseek_mtp.py**
+# ** 9. File: worker/patch_triton.py**
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-#   1. `vllm.model_executor.models.deepseek_mtp.DeepSeekMultiTokenPredictorLayer.__init__`
+#   1. `vllm.model_executor.layers.mamba.ops`, `vllm.model_executor.layers.fla.ops`
 #    Why:
-#       '__init__' func of DeepSeekMultiTokenPredictorLayer didn't pass prefix to SharedHead.
+#       triton ops in vLLM perform not good on NPU. And there is no dispatch mechanism for triton ops.
 #    How：
-#       Replace with a new __init__.
-#       Use a new SharedHead which passes prefix to ParallelLMHead.
+#       override triton ops in vLLM with ascend implementation
 #    Related PR (if no, explain why):
-#       https://github.com/vllm-project/vllm/pull/25805
+#       Let vLLM support triton ops dispatch.
 #    Future Plan:
-#       Remove this patch when adapted vllm version contains the above PR.
+#       Remove this patch when vLLM support the dispatch function.
+#
+# ** 10. File: worker/patch_weight_loader.py**
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+#   1. `vllm.model_executor.layers.linear.UnquantizedLinearMethod`
+#    Why:
+#       vLLM Ascend doesn't work with weight loader v2
+#    How：
+#       patch it to fix the bug.
+#    Related PR (if no, explain why):
+#       This is a bug by Ascend only.  We should fix it soon
+#    Future Plan:
+#       Remove this patch when the bug is fixed.
 #
 # ** File: worker/patch_qwen3_next_mtp.py**
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vllm_ascend/patch/worker/patch_qwen2_5_omni.py

@@ -67,6 +67,6 @@ class AscendQwen2_5OmniThinkerForConditionalGeneration(nn.Module):
         return video_embeds.split(sizes.tolist())
 
 
-# NOTE: These will be removed after https://github.com/vllm-project/vllm/pull/29388 is merged.
+# NOTE: These will be removed after ascend_forward_context is refactored.
 Qwen2_5OmniThinkerForConditionalGeneration._process_image_input = AscendQwen2_5OmniThinkerForConditionalGeneration._process_image_input
 Qwen2_5OmniThinkerForConditionalGeneration._process_video_input = AscendQwen2_5OmniThinkerForConditionalGeneration._process_video_input

vllm_ascend/patch/worker/patch_qwen2_5_vl.py

@@ -170,6 +170,6 @@ class AscendQwen2_5_VLForConditionalGeneration(nn.Module):
 Qwen2VisionAttention.forward = AscendQwen2_5_VisionAttention.forward
 Qwen2_5_VisionAttention.forward = AscendQwen2_5_VisionAttention.forward
 
-# NOTE: These will be removed after https://github.com/vllm-project/vllm/pull/29388 is merged.
+# NOTE: These will be removed after ascend_forward_context is refactored.
 Qwen2_5_VLForConditionalGeneration._process_image_input = AscendQwen2_5_VLForConditionalGeneration._process_image_input
 Qwen2_5_VLForConditionalGeneration._process_video_input = AscendQwen2_5_VLForConditionalGeneration._process_video_input