Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

19 files changed, 228 insertions, 150 deletions

diff --git a/dom/webgpu/Adapter.cpp b/dom/webgpu/Adapter.cpp
index 434ba7c6fa..7c0e72eac4 100644
--- a/dom/webgpu/Adapter.cpp
+++ b/dom/webgpu/Adapter.cpp
@@ -128,9 +128,6 @@ static Maybe<ffi::WGPUFeatures> ToWGPUFeatures(
 
     case dom::GPUFeatureName::Float32_filterable:
       return Some(WGPUFeatures_FLOAT32_FILTERABLE);
-
-    case dom::GPUFeatureName::EndGuard_:
-      break;
   }
   MOZ_CRASH("Bad GPUFeatureName.");
 }
@@ -141,11 +138,11 @@ static Maybe<ffi::WGPUFeatures> MakeFeatureBits(
   for (const auto& feature : aFeatures) {
     const auto bit = ToWGPUFeatures(feature);
     if (!bit) {
-      const auto featureStr = dom::GPUFeatureNameValues::GetString(feature);
+      const auto featureStr = dom::GetEnumString(feature);
       (void)featureStr;
       NS_WARNING(
           nsPrintfCString("Requested feature bit for '%s' is not implemented.",
-                          featureStr.data())
+                          featureStr.get())
               .get());
       return Nothing();
     }
@@ -169,7 +166,7 @@ Adapter::Adapter(Instance* const aParent, WebGPUChild* const aBridge,
     auto ret = std::unordered_map<ffi::WGPUFeatures, dom::GPUFeatureName>{};
 
     for (const auto feature :
-         MakeEnumeratedRange(dom::GPUFeatureName::EndGuard_)) {
+         dom::MakeWebIDLEnumeratedRange<dom::GPUFeatureName>()) {
       const auto bitForFeature = ToWGPUFeatures(feature);
       if (!bitForFeature) {
         // There are some features that don't have bits.
@@ -363,12 +360,12 @@ already_AddRefed<dom::Promise> Adapter::RequestDevice(
     for (const auto requested : aDesc.mRequiredFeatures) {
       const bool supported = mFeatures->Features().count(requested);
       if (!supported) {
-        const auto fstr = dom::GPUFeatureNameValues::GetString(requested);
+        const auto fstr = dom::GetEnumString(requested);
         const auto astr = this->LabelOrId();
         nsPrintfCString msg(
             "requestDevice: Feature '%s' requested must be supported by "
             "adapter %s",
-            fstr.data(), astr.get());
+            fstr.get(), astr.get());
         promise->MaybeRejectWithTypeError(msg);
         return;
       }
diff --git a/dom/webgpu/CanvasContext.h b/dom/webgpu/CanvasContext.h
index 58ef04e861..057287b26e 100644
--- a/dom/webgpu/CanvasContext.h
+++ b/dom/webgpu/CanvasContext.h
@@ -84,6 +84,8 @@ class CanvasContext final : public nsICanvasRenderingContextInternal,
   already_AddRefed<layers::FwdTransactionTracker> UseCompositableForwarder(
       layers::CompositableForwarder* aForwarder) override;
 
+  bool IsOffscreenCanvas() { return !!mOffscreenCanvas; }
+
  public:
   void GetCanvas(dom::OwningHTMLCanvasElementOrOffscreenCanvas&) const;
 
diff --git a/dom/webgpu/CommandBuffer.cpp b/dom/webgpu/CommandBuffer.cpp
index ff9bbd8d5d..59023018ef 100644
--- a/dom/webgpu/CommandBuffer.cpp
+++ b/dom/webgpu/CommandBuffer.cpp
@@ -16,10 +16,13 @@ namespace mozilla::webgpu {
 GPU_IMPL_CYCLE_COLLECTION(CommandBuffer, mParent)
 GPU_IMPL_JS_WRAP(CommandBuffer)
 
-CommandBuffer::CommandBuffer(Device* const aParent, RawId aId,
-                             nsTArray<WeakPtr<CanvasContext>>&& aTargetContexts,
-                             RefPtr<CommandEncoder>&& aEncoder)
-    : ChildOf(aParent), mId(aId), mTargetContexts(std::move(aTargetContexts)) {
+CommandBuffer::CommandBuffer(
+    Device* const aParent, RawId aId,
+    nsTArray<WeakPtr<CanvasContext>>&& aPresentationContexts,
+    RefPtr<CommandEncoder>&& aEncoder)
+    : ChildOf(aParent),
+      mId(aId),
+      mPresentationContexts(std::move(aPresentationContexts)) {
   mEncoder = std::move(aEncoder);
   MOZ_RELEASE_ASSERT(aId);
 }
@@ -33,9 +36,9 @@ Maybe<RawId> CommandBuffer::Commit() {
     return Nothing();
   }
   mValid = false;
-  for (const auto& targetContext : mTargetContexts) {
-    if (targetContext) {
-      targetContext->MaybeQueueSwapChainPresent();
+  for (const auto& presentationContext : mPresentationContexts) {
+    if (presentationContext) {
+      presentationContext->MaybeQueueSwapChainPresent();
     }
   }
   return Some(mId);
diff --git a/dom/webgpu/CommandBuffer.h b/dom/webgpu/CommandBuffer.h
index b9c2495fb7..dff3e14d75 100644
--- a/dom/webgpu/CommandBuffer.h
+++ b/dom/webgpu/CommandBuffer.h
@@ -22,7 +22,7 @@ class CommandBuffer final : public ObjectBase, public ChildOf<Device> {
   GPU_DECL_JS_WRAP(CommandBuffer)
 
   CommandBuffer(Device* const aParent, RawId aId,
-                nsTArray<WeakPtr<CanvasContext>>&& aTargetContexts,
+                nsTArray<WeakPtr<CanvasContext>>&& aPresentationContexts,
                 RefPtr<CommandEncoder>&& aEncoder);
 
   Maybe<RawId> Commit();
@@ -33,7 +33,7 @@ class CommandBuffer final : public ObjectBase, public ChildOf<Device> {
   void Cleanup();
 
   const RawId mId;
-  const nsTArray<WeakPtr<CanvasContext>> mTargetContexts;
+  const nsTArray<WeakPtr<CanvasContext>> mPresentationContexts;
   // Command buffers and encoders share the same identity (this is a
   // simplifcation currently made by wgpu). To avoid dropping the same ID twice,
   // the wgpu resource lifetime is tied to the encoder which is held alive by
diff --git a/dom/webgpu/CommandEncoder.cpp b/dom/webgpu/CommandEncoder.cpp
index 15d95401d4..f254c9d8b9 100644
--- a/dom/webgpu/CommandEncoder.cpp
+++ b/dom/webgpu/CommandEncoder.cpp
@@ -3,6 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#include "mozilla/dom/UnionTypes.h"
 #include "mozilla/dom/WebGPUBinding.h"
 #include "CommandEncoder.h"
 
@@ -89,6 +90,14 @@ void CommandEncoder::Cleanup() {
   }
 }
 
+void CommandEncoder::TrackPresentationContext(CanvasContext* aTargetContext) {
+  if (aTargetContext) {
+    if (!aTargetContext->IsOffscreenCanvas()) {
+      mPresentationContexts.AppendElement(aTargetContext);
+    }
+  }
+}
+
 void CommandEncoder::CopyBufferToBuffer(const Buffer& aSource,
                                         BufferAddress aSourceOffset,
                                         const Buffer& aDestination,
@@ -121,10 +130,7 @@ void CommandEncoder::CopyBufferToTexture(
       ConvertExtent(aCopySize), ToFFI(&bb));
   mBridge->SendCommandEncoderAction(mId, mParent->mId, std::move(bb));
 
-  const auto& targetContext = aDestination.mTexture->mTargetContext;
-  if (targetContext) {
-    mTargetContexts.AppendElement(targetContext);
-  }
+  TrackPresentationContext(aDestination.mTexture->mTargetContext);
 }
 void CommandEncoder::CopyTextureToBuffer(
     const dom::GPUImageCopyTexture& aSource,
@@ -156,10 +162,7 @@ void CommandEncoder::CopyTextureToTexture(
       ConvertExtent(aCopySize), ToFFI(&bb));
   mBridge->SendCommandEncoderAction(mId, mParent->mId, std::move(bb));
 
-  const auto& targetContext = aDestination.mTexture->mTargetContext;
-  if (targetContext) {
-    mTargetContexts.AppendElement(targetContext);
-  }
+  TrackPresentationContext(aDestination.mTexture->mTargetContext);
 }
 
 void CommandEncoder::ClearBuffer(const Buffer& aBuffer, const uint64_t aOffset,
@@ -216,13 +219,9 @@ already_AddRefed<ComputePassEncoder> CommandEncoder::BeginComputePass(
 already_AddRefed<RenderPassEncoder> CommandEncoder::BeginRenderPass(
     const dom::GPURenderPassDescriptor& aDesc) {
   for (const auto& at : aDesc.mColorAttachments) {
-    auto* targetContext = at.mView->GetTargetContext();
-    if (targetContext) {
-      mTargetContexts.AppendElement(targetContext);
-    }
+    TrackPresentationContext(at.mView->GetTargetContext());
     if (at.mResolveTarget.WasPassed()) {
-      targetContext = at.mResolveTarget.Value().GetTargetContext();
-      mTargetContexts.AppendElement(targetContext);
+      TrackPresentationContext(at.mResolveTarget.Value().GetTargetContext());
     }
   }
 
@@ -230,24 +229,24 @@ already_AddRefed<RenderPassEncoder> CommandEncoder::BeginRenderPass(
   return pass.forget();
 }
 
-void CommandEncoder::EndComputePass(ffi::WGPUComputePass& aPass) {
+void CommandEncoder::EndComputePass(ffi::WGPURecordedComputePass& aPass) {
   if (!mBridge->IsOpen()) {
     return;
   }
 
   ipc::ByteBuf byteBuf;
   ffi::wgpu_compute_pass_finish(&aPass, ToFFI(&byteBuf));
-  mBridge->SendCommandEncoderAction(mId, mParent->mId, std::move(byteBuf));
+  mBridge->SendComputePass(mId, mParent->mId, std::move(byteBuf));
 }
 
-void CommandEncoder::EndRenderPass(ffi::WGPURenderPass& aPass) {
+void CommandEncoder::EndRenderPass(ffi::WGPURecordedRenderPass& aPass) {
   if (!mBridge->IsOpen()) {
     return;
   }
 
   ipc::ByteBuf byteBuf;
   ffi::wgpu_render_pass_finish(&aPass, ToFFI(&byteBuf));
-  mBridge->SendCommandEncoderAction(mId, mParent->mId, std::move(byteBuf));
+  mBridge->SendRenderPass(mId, mParent->mId, std::move(byteBuf));
 }
 
 already_AddRefed<CommandBuffer> CommandEncoder::Finish(
@@ -263,7 +262,7 @@ already_AddRefed<CommandBuffer> CommandEncoder::Finish(
 
   RefPtr<CommandEncoder> me(this);
   RefPtr<CommandBuffer> comb = new CommandBuffer(
-      mParent, mId, std::move(mTargetContexts), std::move(me));
+      mParent, mId, std::move(mPresentationContexts), std::move(me));
   return comb.forget();
 }
 
diff --git a/dom/webgpu/CommandEncoder.h b/dom/webgpu/CommandEncoder.h
index 52b10a5b2e..99a2fb15b4 100644
--- a/dom/webgpu/CommandEncoder.h
+++ b/dom/webgpu/CommandEncoder.h
@@ -32,7 +32,7 @@ using GPUExtent3D = RangeEnforcedUnsignedLongSequenceOrGPUExtent3DDict;
 namespace webgpu {
 namespace ffi {
 struct WGPUComputePass;
-struct WGPURenderPass;
+struct WGPURecordedRenderPass;
 struct WGPUImageDataLayout;
 struct WGPUImageCopyTexture_TextureId;
 struct WGPUExtent3d;
@@ -67,13 +67,15 @@ class CommandEncoder final : public ObjectBase, public ChildOf<Device> {
   void Cleanup();
 
   RefPtr<WebGPUChild> mBridge;
-  nsTArray<WeakPtr<CanvasContext>> mTargetContexts;
+  nsTArray<WeakPtr<CanvasContext>> mPresentationContexts;
+
+  void TrackPresentationContext(CanvasContext* aTargetContext);
 
  public:
   const auto& GetDevice() const { return mParent; };
 
-  void EndComputePass(ffi::WGPUComputePass& aPass);
-  void EndRenderPass(ffi::WGPURenderPass& aPass);
+  void EndComputePass(ffi::WGPURecordedComputePass& aPass);
+  void EndRenderPass(ffi::WGPURecordedRenderPass& aPass);
 
   void CopyBufferToBuffer(const Buffer& aSource, BufferAddress aSourceOffset,
                           const Buffer& aDestination,
diff --git a/dom/webgpu/ComputePassEncoder.cpp b/dom/webgpu/ComputePassEncoder.cpp
index 2820a575e8..190bbf00a7 100644
--- a/dom/webgpu/ComputePassEncoder.cpp
+++ b/dom/webgpu/ComputePassEncoder.cpp
@@ -17,13 +17,13 @@ GPU_IMPL_CYCLE_COLLECTION(ComputePassEncoder, mParent, mUsedBindGroups,
                           mUsedPipelines)
 GPU_IMPL_JS_WRAP(ComputePassEncoder)
 
-void ffiWGPUComputePassDeleter::operator()(ffi::WGPUComputePass* raw) {
+void ffiWGPUComputePassDeleter::operator()(ffi::WGPURecordedComputePass* raw) {
   if (raw) {
     ffi::wgpu_compute_pass_destroy(raw);
   }
 }
 
-ffi::WGPUComputePass* BeginComputePass(
+ffi::WGPURecordedComputePass* BeginComputePass(
     RawId aEncoderId, const dom::GPUComputePassDescriptor& aDesc) {
   MOZ_RELEASE_ASSERT(aEncoderId);
   ffi::WGPUComputePassDescriptor desc = {};
@@ -31,7 +31,7 @@ ffi::WGPUComputePass* BeginComputePass(
   webgpu::StringHelper label(aDesc.mLabel);
   desc.label = label.Get();
 
-  return ffi::wgpu_command_encoder_begin_compute_pass(aEncoderId, &desc);
+  return ffi::wgpu_command_encoder_begin_compute_pass(&desc);
 }
 
 ComputePassEncoder::ComputePassEncoder(
@@ -49,16 +49,16 @@ void ComputePassEncoder::SetBindGroup(
     const dom::Sequence<uint32_t>& aDynamicOffsets) {
   if (mValid) {
     mUsedBindGroups.AppendElement(&aBindGroup);
-    ffi::wgpu_compute_pass_set_bind_group(mPass.get(), aSlot, aBindGroup.mId,
-                                          aDynamicOffsets.Elements(),
-                                          aDynamicOffsets.Length());
+    ffi::wgpu_recorded_compute_pass_set_bind_group(
+        mPass.get(), aSlot, aBindGroup.mId, aDynamicOffsets.Elements(),
+        aDynamicOffsets.Length());
   }
 }
 
 void ComputePassEncoder::SetPipeline(const ComputePipeline& aPipeline) {
   if (mValid) {
     mUsedPipelines.AppendElement(&aPipeline);
-    ffi::wgpu_compute_pass_set_pipeline(mPass.get(), aPipeline.mId);
+    ffi::wgpu_recorded_compute_pass_set_pipeline(mPass.get(), aPipeline.mId);
   }
 }
 
@@ -66,7 +66,7 @@ void ComputePassEncoder::DispatchWorkgroups(uint32_t workgroupCountX,
                                             uint32_t workgroupCountY,
                                             uint32_t workgroupCountZ) {
   if (mValid) {
-    ffi::wgpu_compute_pass_dispatch_workgroups(
+    ffi::wgpu_recorded_compute_pass_dispatch_workgroups(
         mPass.get(), workgroupCountX, workgroupCountY, workgroupCountZ);
   }
 }
@@ -74,7 +74,7 @@ void ComputePassEncoder::DispatchWorkgroups(uint32_t workgroupCountX,
 void ComputePassEncoder::DispatchWorkgroupsIndirect(
     const Buffer& aIndirectBuffer, uint64_t aIndirectOffset) {
   if (mValid) {
-    ffi::wgpu_compute_pass_dispatch_workgroups_indirect(
+    ffi::wgpu_recorded_compute_pass_dispatch_workgroups_indirect(
         mPass.get(), aIndirectBuffer.mId, aIndirectOffset);
   }
 }
@@ -82,18 +82,20 @@ void ComputePassEncoder::DispatchWorkgroupsIndirect(
 void ComputePassEncoder::PushDebugGroup(const nsAString& aString) {
   if (mValid) {
     const NS_ConvertUTF16toUTF8 utf8(aString);
-    ffi::wgpu_compute_pass_push_debug_group(mPass.get(), utf8.get(), 0);
+    ffi::wgpu_recorded_compute_pass_push_debug_group(mPass.get(), utf8.get(),
+                                                     0);
   }
 }
 void ComputePassEncoder::PopDebugGroup() {
   if (mValid) {
-    ffi::wgpu_compute_pass_pop_debug_group(mPass.get());
+    ffi::wgpu_recorded_compute_pass_pop_debug_group(mPass.get());
   }
 }
 void ComputePassEncoder::InsertDebugMarker(const nsAString& aString) {
   if (mValid) {
     const NS_ConvertUTF16toUTF8 utf8(aString);
-    ffi::wgpu_compute_pass_insert_debug_marker(mPass.get(), utf8.get(), 0);
+    ffi::wgpu_recorded_compute_pass_insert_debug_marker(mPass.get(), utf8.get(),
+                                                        0);
   }
 }
 
diff --git a/dom/webgpu/ComputePassEncoder.h b/dom/webgpu/ComputePassEncoder.h
index 8160a09e2e..2455822f79 100644
--- a/dom/webgpu/ComputePassEncoder.h
+++ b/dom/webgpu/ComputePassEncoder.h
@@ -18,7 +18,7 @@ struct GPUComputePassDescriptor;
 
 namespace webgpu {
 namespace ffi {
-struct WGPUComputePass;
+struct WGPURecordedComputePass;
 }  // namespace ffi
 
 class BindGroup;
@@ -27,7 +27,7 @@ class CommandEncoder;
 class ComputePipeline;
 
 struct ffiWGPUComputePassDeleter {
-  void operator()(ffi::WGPUComputePass*);
+  void operator()(ffi::WGPURecordedComputePass*);
 };
 
 class ComputePassEncoder final : public ObjectBase,
@@ -43,7 +43,8 @@ class ComputePassEncoder final : public ObjectBase,
   virtual ~ComputePassEncoder();
   void Cleanup() {}
 
-  std::unique_ptr<ffi::WGPUComputePass, ffiWGPUComputePassDeleter> mPass;
+  std::unique_ptr<ffi::WGPURecordedComputePass, ffiWGPUComputePassDeleter>
+      mPass;
   // keep all the used objects alive while the pass is recorded
   nsTArray<RefPtr<const BindGroup>> mUsedBindGroups;
   nsTArray<RefPtr<const ComputePipeline>> mUsedPipelines;
diff --git a/dom/webgpu/Device.cpp b/dom/webgpu/Device.cpp
index a659047af1..a9fd5ee44c 100644
--- a/dom/webgpu/Device.cpp
+++ b/dom/webgpu/Device.cpp
@@ -247,6 +247,7 @@ already_AddRefed<Sampler> Device::CreateSampler(
   desc.mipmap_filter = ffi::WGPUFilterMode(aDesc.mMipmapFilter);
   desc.lod_min_clamp = aDesc.mLodMinClamp;
   desc.lod_max_clamp = aDesc.mLodMaxClamp;
+  desc.max_anisotropy = aDesc.mMaxAnisotropy;
 
   ffi::WGPUCompareFunction comparison = ffi::WGPUCompareFunction_Sentinel;
   if (aDesc.mCompare.WasPassed()) {
@@ -320,8 +321,6 @@ already_AddRefed<BindGroupLayout> Device::CreateBindGroupLayout(
         case dom::GPUTextureSampleType::Depth:
           data.type = ffi::WGPURawTextureSampleType_Depth;
           break;
-        case dom::GPUTextureSampleType::EndGuard_:
-          MOZ_ASSERT_UNREACHABLE();
       }
     }
     if (entry.mStorageTexture.WasPassed()) {
@@ -349,8 +348,6 @@ already_AddRefed<BindGroupLayout> Device::CreateBindGroupLayout(
         case dom::GPUBufferBindingType::Read_only_storage:
           e.ty = ffi::WGPURawBindingType_ReadonlyStorageBuffer;
           break;
-        case dom::GPUBufferBindingType::EndGuard_:
-          MOZ_ASSERT_UNREACHABLE();
       }
       e.has_dynamic_offset = entry.mBuffer.Value().mHasDynamicOffset;
     }
@@ -361,10 +358,23 @@ already_AddRefed<BindGroupLayout> Device::CreateBindGroupLayout(
       e.multisampled = entry.mTexture.Value().mMultisampled;
     }
     if (entry.mStorageTexture.WasPassed()) {
-      e.ty = entry.mStorageTexture.Value().mAccess ==
-                     dom::GPUStorageTextureAccess::Write_only
-                 ? ffi::WGPURawBindingType_WriteonlyStorageTexture
-                 : ffi::WGPURawBindingType_ReadonlyStorageTexture;
+      switch (entry.mStorageTexture.Value().mAccess) {
+        case dom::GPUStorageTextureAccess::Write_only: {
+          e.ty = ffi::WGPURawBindingType_WriteonlyStorageTexture;
+          break;
+        }
+        case dom::GPUStorageTextureAccess::Read_only: {
+          e.ty = ffi::WGPURawBindingType_ReadonlyStorageTexture;
+          break;
+        }
+        case dom::GPUStorageTextureAccess::Read_write: {
+          e.ty = ffi::WGPURawBindingType_ReadWriteStorageTexture;
+          break;
+        }
+        default: {
+          MOZ_ASSERT_UNREACHABLE();
+        }
+      }
       e.view_dimension = &optional[i].dim;
       e.storage_texture_format = &optional[i].format;
     }
@@ -379,8 +389,6 @@ already_AddRefed<BindGroupLayout> Device::CreateBindGroupLayout(
         case dom::GPUSamplerBindingType::Comparison:
           e.sampler_compare = true;
           break;
-        case dom::GPUSamplerBindingType::EndGuard_:
-          MOZ_ASSERT_UNREACHABLE();
       }
     }
     entries.AppendElement(e);
@@ -671,8 +679,12 @@ RawId CreateComputePipelineImpl(PipelineCreationContext* const aContext,
     MOZ_ASSERT_UNREACHABLE();
   }
   desc.stage.module = aDesc.mCompute.mModule->mId;
-  CopyUTF16toUTF8(aDesc.mCompute.mEntryPoint, entryPoint);
-  desc.stage.entry_point = entryPoint.get();
+  if (aDesc.mCompute.mEntryPoint.WasPassed()) {
+    CopyUTF16toUTF8(aDesc.mCompute.mEntryPoint.Value(), entryPoint);
+    desc.stage.entry_point = entryPoint.get();
+  } else {
+    desc.stage.entry_point = nullptr;
+  }
 
   RawId implicit_bgl_ids[WGPUMAX_BIND_GROUPS] = {};
   RawId id = ffi::wgpu_client_create_compute_pipeline(
@@ -717,8 +729,12 @@ RawId CreateRenderPipelineImpl(PipelineCreationContext* const aContext,
   {
     const auto& stage = aDesc.mVertex;
     vertexState.stage.module = stage.mModule->mId;
-    CopyUTF16toUTF8(stage.mEntryPoint, vsEntry);
-    vertexState.stage.entry_point = vsEntry.get();
+    if (stage.mEntryPoint.WasPassed()) {
+      CopyUTF16toUTF8(stage.mEntryPoint.Value(), vsEntry);
+      vertexState.stage.entry_point = vsEntry.get();
+    } else {
+      vertexState.stage.entry_point = nullptr;
+    }
 
     for (const auto& vertex_desc : stage.mBuffers) {
       ffi::WGPUVertexBufferLayout vb_desc = {};
@@ -753,8 +769,12 @@ RawId CreateRenderPipelineImpl(PipelineCreationContext* const aContext,
   if (aDesc.mFragment.WasPassed()) {
     const auto& stage = aDesc.mFragment.Value();
     fragmentState.stage.module = stage.mModule->mId;
-    CopyUTF16toUTF8(stage.mEntryPoint, fsEntry);
-    fragmentState.stage.entry_point = fsEntry.get();
+    if (stage.mEntryPoint.WasPassed()) {
+      CopyUTF16toUTF8(stage.mEntryPoint.Value(), fsEntry);
+      fragmentState.stage.entry_point = fsEntry.get();
+    } else {
+      fragmentState.stage.entry_point = nullptr;
+    }
 
     // Note: we pre-collect the blend states into a different array
     // so that we can have non-stale pointers into it.
diff --git a/dom/webgpu/Queue.cpp b/dom/webgpu/Queue.cpp
index 26952ee173..ca25b2f290 100644
--- a/dom/webgpu/Queue.cpp
+++ b/dom/webgpu/Queue.cpp
@@ -69,18 +69,36 @@ void Queue::WriteBuffer(const Buffer& aBuffer, uint64_t aBufferOffset,
     return;
   }
 
-  dom::ProcessTypedArraysFixed(aData, [&](const Span<const uint8_t>& aData) {
-    uint64_t length = aData.Length();
-    const auto checkedSize = aSize.WasPassed()
-                                 ? CheckedInt<size_t>(aSize.Value())
-                                 : CheckedInt<size_t>(length) - aDataOffset;
-    if (!checkedSize.isValid()) {
+  size_t elementByteSize = 1;
+  if (aData.IsArrayBufferView()) {
+    auto type = aData.GetAsArrayBufferView().Type();
+    if (type != JS::Scalar::MaxTypedArrayViewType) {
+      elementByteSize = byteSize(type);
+    }
+  }
+  dom::ProcessTypedArraysFixed(aData, [&, elementByteSize](
+                                          const Span<const uint8_t>& aData) {
+    uint64_t byteLength = aData.Length();
+
+    auto checkedByteOffset =
+        CheckedInt<uint64_t>(aDataOffset) * elementByteSize;
+    if (!checkedByteOffset.isValid()) {
+      aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+      return;
+    }
+    auto offset = checkedByteOffset.value();
+
+    const auto checkedByteSize =
+        aSize.WasPassed() ? CheckedInt<size_t>(aSize.Value()) * elementByteSize
+                          : CheckedInt<size_t>(byteLength) - offset;
+    if (!checkedByteSize.isValid()) {
       aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
       return;
     }
+    auto size = checkedByteSize.value();
 
-    const auto& size = checkedSize.value();
-    if (aDataOffset + size > length) {
+    auto checkedByteEnd = CheckedInt<uint64_t>(offset) + size;
+    if (!checkedByteEnd.isValid() || checkedByteEnd.value() > byteLength) {
       aRv.ThrowAbortError(nsPrintfCString("Wrong data size %" PRIuPTR, size));
       return;
     }
diff --git a/dom/webgpu/RenderPassEncoder.cpp b/dom/webgpu/RenderPassEncoder.cpp
index c5cb19ce15..03c16ea3a4 100644
--- a/dom/webgpu/RenderPassEncoder.cpp
+++ b/dom/webgpu/RenderPassEncoder.cpp
@@ -18,7 +18,7 @@ GPU_IMPL_CYCLE_COLLECTION(RenderPassEncoder, mParent, mUsedBindGroups,
                           mUsedRenderBundles)
 GPU_IMPL_JS_WRAP(RenderPassEncoder)
 
-void ffiWGPURenderPassDeleter::operator()(ffi::WGPURenderPass* raw) {
+void ffiWGPURenderPassDeleter::operator()(ffi::WGPURecordedRenderPass* raw) {
   if (raw) {
     ffi::wgpu_render_pass_destroy(raw);
   }
@@ -30,8 +30,6 @@ static ffi::WGPULoadOp ConvertLoadOp(const dom::GPULoadOp& aOp) {
       return ffi::WGPULoadOp_Load;
     case dom::GPULoadOp::Clear:
       return ffi::WGPULoadOp_Clear;
-    case dom::GPULoadOp::EndGuard_:
-      break;
   }
   MOZ_CRASH("bad GPULoadOp");
 }
@@ -42,8 +40,6 @@ static ffi::WGPUStoreOp ConvertStoreOp(const dom::GPUStoreOp& aOp) {
       return ffi::WGPUStoreOp_Store;
     case dom::GPUStoreOp::Discard:
       return ffi::WGPUStoreOp_Discard;
-    case dom::GPUStoreOp::EndGuard_:
-      break;
   }
   MOZ_CRASH("bad GPUStoreOp");
 }
@@ -87,7 +83,7 @@ static ffi::WGPUColor ConvertColor(
   return ffi::WGPUColor();
 }
 
-ffi::WGPURenderPass* BeginRenderPass(
+ffi::WGPURecordedRenderPass* BeginRenderPass(
     CommandEncoder* const aParent, const dom::GPURenderPassDescriptor& aDesc) {
   ffi::WGPURenderPassDescriptor desc = {};
 
@@ -155,7 +151,7 @@ ffi::WGPURenderPass* BeginRenderPass(
     }
   }
 
-  return ffi::wgpu_command_encoder_begin_render_pass(aParent->mId, &desc);
+  return ffi::wgpu_command_encoder_begin_render_pass(&desc);
 }
 
 RenderPassEncoder::RenderPassEncoder(CommandEncoder* const aParent,
@@ -186,16 +182,16 @@ void RenderPassEncoder::SetBindGroup(
     const dom::Sequence<uint32_t>& aDynamicOffsets) {
   if (mValid) {
     mUsedBindGroups.AppendElement(&aBindGroup);
-    ffi::wgpu_render_pass_set_bind_group(mPass.get(), aSlot, aBindGroup.mId,
-                                         aDynamicOffsets.Elements(),
-                                         aDynamicOffsets.Length());
+    ffi::wgpu_recorded_render_pass_set_bind_group(
+        mPass.get(), aSlot, aBindGroup.mId, aDynamicOffsets.Elements(),
+        aDynamicOffsets.Length());
   }
 }
 
 void RenderPassEncoder::SetPipeline(const RenderPipeline& aPipeline) {
   if (mValid) {
     mUsedPipelines.AppendElement(&aPipeline);
-    ffi::wgpu_render_pass_set_pipeline(mPass.get(), aPipeline.mId);
+    ffi::wgpu_recorded_render_pass_set_pipeline(mPass.get(), aPipeline.mId);
   }
 }
 
@@ -207,8 +203,8 @@ void RenderPassEncoder::SetIndexBuffer(const Buffer& aBuffer,
     const auto iformat = aIndexFormat == dom::GPUIndexFormat::Uint32
                              ? ffi::WGPUIndexFormat_Uint32
                              : ffi::WGPUIndexFormat_Uint16;
-    ffi::wgpu_render_pass_set_index_buffer(mPass.get(), aBuffer.mId, iformat,
-                                           aOffset, aSize);
+    ffi::wgpu_recorded_render_pass_set_index_buffer(mPass.get(), aBuffer.mId,
+                                                    iformat, aOffset, aSize);
   }
 }
 
@@ -216,16 +212,17 @@ void RenderPassEncoder::SetVertexBuffer(uint32_t aSlot, const Buffer& aBuffer,
                                         uint64_t aOffset, uint64_t aSize) {
   if (mValid) {
     mUsedBuffers.AppendElement(&aBuffer);
-    ffi::wgpu_render_pass_set_vertex_buffer(mPass.get(), aSlot, aBuffer.mId,
-                                            aOffset, aSize);
+    ffi::wgpu_recorded_render_pass_set_vertex_buffer(
+        mPass.get(), aSlot, aBuffer.mId, aOffset, aSize);
   }
 }
 
 void RenderPassEncoder::Draw(uint32_t aVertexCount, uint32_t aInstanceCount,
                              uint32_t aFirstVertex, uint32_t aFirstInstance) {
   if (mValid) {
-    ffi::wgpu_render_pass_draw(mPass.get(), aVertexCount, aInstanceCount,
-                               aFirstVertex, aFirstInstance);
+    ffi::wgpu_recorded_render_pass_draw(mPass.get(), aVertexCount,
+                                        aInstanceCount, aFirstVertex,
+                                        aFirstInstance);
   }
 }
 
@@ -234,24 +231,24 @@ void RenderPassEncoder::DrawIndexed(uint32_t aIndexCount,
                                     uint32_t aFirstIndex, int32_t aBaseVertex,
                                     uint32_t aFirstInstance) {
   if (mValid) {
-    ffi::wgpu_render_pass_draw_indexed(mPass.get(), aIndexCount, aInstanceCount,
-                                       aFirstIndex, aBaseVertex,
-                                       aFirstInstance);
+    ffi::wgpu_recorded_render_pass_draw_indexed(mPass.get(), aIndexCount,
+                                                aInstanceCount, aFirstIndex,
+                                                aBaseVertex, aFirstInstance);
   }
 }
 
 void RenderPassEncoder::DrawIndirect(const Buffer& aIndirectBuffer,
                                      uint64_t aIndirectOffset) {
   if (mValid) {
-    ffi::wgpu_render_pass_draw_indirect(mPass.get(), aIndirectBuffer.mId,
-                                        aIndirectOffset);
+    ffi::wgpu_recorded_render_pass_draw_indirect(
+        mPass.get(), aIndirectBuffer.mId, aIndirectOffset);
   }
 }
 
 void RenderPassEncoder::DrawIndexedIndirect(const Buffer& aIndirectBuffer,
                                             uint64_t aIndirectOffset) {
   if (mValid) {
-    ffi::wgpu_render_pass_draw_indexed_indirect(
+    ffi::wgpu_recorded_render_pass_draw_indexed_indirect(
         mPass.get(), aIndirectBuffer.mId, aIndirectOffset);
   }
 }
@@ -259,15 +256,16 @@ void RenderPassEncoder::DrawIndexedIndirect(const Buffer& aIndirectBuffer,
 void RenderPassEncoder::SetViewport(float x, float y, float width, float height,
                                     float minDepth, float maxDepth) {
   if (mValid) {
-    ffi::wgpu_render_pass_set_viewport(mPass.get(), x, y, width, height,
-                                       minDepth, maxDepth);
+    ffi::wgpu_recorded_render_pass_set_viewport(mPass.get(), x, y, width,
+                                                height, minDepth, maxDepth);
   }
 }
 
 void RenderPassEncoder::SetScissorRect(uint32_t x, uint32_t y, uint32_t width,
                                        uint32_t height) {
   if (mValid) {
-    ffi::wgpu_render_pass_set_scissor_rect(mPass.get(), x, y, width, height);
+    ffi::wgpu_recorded_render_pass_set_scissor_rect(mPass.get(), x, y, width,
+                                                    height);
   }
 }
 
@@ -275,13 +273,14 @@ void RenderPassEncoder::SetBlendConstant(
     const dom::DoubleSequenceOrGPUColorDict& color) {
   if (mValid) {
     ffi::WGPUColor aColor = ConvertColor(color);
-    ffi::wgpu_render_pass_set_blend_constant(mPass.get(), &aColor);
+    ffi::wgpu_recorded_render_pass_set_blend_constant(mPass.get(), &aColor);
   }
 }
 
 void RenderPassEncoder::SetStencilReference(uint32_t reference) {
   if (mValid) {
-    ffi::wgpu_render_pass_set_stencil_reference(mPass.get(), reference);
+    ffi::wgpu_recorded_render_pass_set_stencil_reference(mPass.get(),
+                                                         reference);
   }
 }
 
@@ -293,26 +292,27 @@ void RenderPassEncoder::ExecuteBundles(
       mUsedRenderBundles.AppendElement(bundle);
       renderBundles.AppendElement(bundle->mId);
     }
-    ffi::wgpu_render_pass_execute_bundles(mPass.get(), renderBundles.Elements(),
-                                          renderBundles.Length());
+    ffi::wgpu_recorded_render_pass_execute_bundles(
+        mPass.get(), renderBundles.Elements(), renderBundles.Length());
   }
 }
 
 void RenderPassEncoder::PushDebugGroup(const nsAString& aString) {
   if (mValid) {
     const NS_ConvertUTF16toUTF8 utf8(aString);
-    ffi::wgpu_render_pass_push_debug_group(mPass.get(), utf8.get(), 0);
+    ffi::wgpu_recorded_render_pass_push_debug_group(mPass.get(), utf8.get(), 0);
   }
 }
 void RenderPassEncoder::PopDebugGroup() {
   if (mValid) {
-    ffi::wgpu_render_pass_pop_debug_group(mPass.get());
+    ffi::wgpu_recorded_render_pass_pop_debug_group(mPass.get());
   }
 }
 void RenderPassEncoder::InsertDebugMarker(const nsAString& aString) {
   if (mValid) {
     const NS_ConvertUTF16toUTF8 utf8(aString);
-    ffi::wgpu_render_pass_insert_debug_marker(mPass.get(), utf8.get(), 0);
+    ffi::wgpu_recorded_render_pass_insert_debug_marker(mPass.get(), utf8.get(),
+                                                       0);
   }
 }
 
diff --git a/dom/webgpu/RenderPassEncoder.h b/dom/webgpu/RenderPassEncoder.h
index 5ca414b4ea..b6008bd013 100644
--- a/dom/webgpu/RenderPassEncoder.h
+++ b/dom/webgpu/RenderPassEncoder.h
@@ -24,7 +24,7 @@ class AutoSequence;
 }  // namespace dom
 namespace webgpu {
 namespace ffi {
-struct WGPURenderPass;
+struct WGPURecordedRenderPass;
 }  // namespace ffi
 
 class BindGroup;
@@ -35,7 +35,7 @@ class RenderPipeline;
 class TextureView;
 
 struct ffiWGPURenderPassDeleter {
-  void operator()(ffi::WGPURenderPass*);
+  void operator()(ffi::WGPURecordedRenderPass*);
 };
 
 class RenderPassEncoder final : public ObjectBase,
@@ -51,7 +51,7 @@ class RenderPassEncoder final : public ObjectBase,
   virtual ~RenderPassEncoder();
   void Cleanup() {}
 
-  std::unique_ptr<ffi::WGPURenderPass, ffiWGPURenderPassDeleter> mPass;
+  std::unique_ptr<ffi::WGPURecordedRenderPass, ffiWGPURenderPassDeleter> mPass;
   // keep all the used objects alive while the pass is recorded
   nsTArray<RefPtr<const BindGroup>> mUsedBindGroups;
   nsTArray<RefPtr<const Buffer>> mUsedBuffers;
diff --git a/dom/webgpu/SupportedFeatures.cpp b/dom/webgpu/SupportedFeatures.cpp
index 294524bc81..a32879a2b0 100644
--- a/dom/webgpu/SupportedFeatures.cpp
+++ b/dom/webgpu/SupportedFeatures.cpp
@@ -5,6 +5,7 @@
 
 #include "SupportedFeatures.h"
 #include "Adapter.h"
+#include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/WebGPUBinding.h"
 
 namespace mozilla::webgpu {
@@ -17,7 +18,7 @@ SupportedFeatures::SupportedFeatures(Adapter* const aParent)
 
 void SupportedFeatures::Add(const dom::GPUFeatureName aFeature,
                             ErrorResult& aRv) {
-  const auto u8 = dom::GPUFeatureNameValues::GetString(aFeature);
+  const auto u8 = dom::GetEnumString(aFeature);
   const auto u16 = NS_ConvertUTF8toUTF16(u8);
   dom::GPUSupportedFeatures_Binding::SetlikeHelpers::Add(this, u16, aRv);
 
diff --git a/dom/webgpu/Utility.cpp b/dom/webgpu/Utility.cpp
index fdb5732e8a..111bac4416 100644
--- a/dom/webgpu/Utility.cpp
+++ b/dom/webgpu/Utility.cpp
@@ -228,8 +228,6 @@ ffi::WGPUTextureFormat ConvertTextureFormat(
     case dom::GPUTextureFormat::Depth32float_stencil8:
       result.tag = ffi::WGPUTextureFormat_Depth32FloatStencil8;
       break;
-    case dom::GPUTextureFormat::EndGuard_:
-      MOZ_ASSERT_UNREACHABLE();
   }
 
   // Clang will check for us that the switch above is exhaustive,
diff --git a/dom/webgpu/ipc/PWebGPU.ipdl b/dom/webgpu/ipc/PWebGPU.ipdl
index 5146dd6826..451480a1c3 100644
--- a/dom/webgpu/ipc/PWebGPU.ipdl
+++ b/dom/webgpu/ipc/PWebGPU.ipdl
@@ -44,6 +44,8 @@ parent:
   async DeviceActionWithAck(RawId selfId, ByteBuf buf) returns (bool dummy);
   async TextureAction(RawId selfId, RawId aDeviceId, ByteBuf buf);
   async CommandEncoderAction(RawId selfId, RawId aDeviceId, ByteBuf buf);
+  async RenderPass(RawId selfId, RawId aDeviceId, ByteBuf buf);
+  async ComputePass(RawId selfId, RawId aDeviceId, ByteBuf buf);
   async BumpImplicitBindGroupLayout(RawId pipelineId, bool isCompute, uint32_t index, RawId assignId);
 
   async DeviceCreateBuffer(RawId deviceId, RawId bufferId, GPUBufferDescriptor desc, UnsafeSharedMemoryHandle shm);
diff --git a/dom/webgpu/ipc/WebGPUChild.cpp b/dom/webgpu/ipc/WebGPUChild.cpp
index 663dd5cb89..ab1a100736 100644
--- a/dom/webgpu/ipc/WebGPUChild.cpp
+++ b/dom/webgpu/ipc/WebGPUChild.cpp
@@ -40,10 +40,10 @@ void WebGPUChild::JsWarning(nsIGlobalObject* aGlobal,
   if (aGlobal) {
     dom::AutoJSAPI api;
     if (api.Init(aGlobal)) {
-      JS::WarnUTF8(api.cx(), "%s", flatString.get());
+      JS::WarnUTF8(api.cx(), "Uncaptured WebGPU error: %s", flatString.get());
     }
   } else {
-    printf_stderr("Validation error without device target: %s\n",
+    printf_stderr("Uncaptured WebGPU error without device target: %s\n",
                   flatString.get());
   }
 }
diff --git a/dom/webgpu/ipc/WebGPUParent.cpp b/dom/webgpu/ipc/WebGPUParent.cpp
index 9b79988245..1c0560d31e 100644
--- a/dom/webgpu/ipc/WebGPUParent.cpp
+++ b/dom/webgpu/ipc/WebGPUParent.cpp
@@ -154,6 +154,12 @@ class ErrorBuffer {
     }
     return Some(Error{*filterType, false, nsCString{mMessageUtf8}});
   }
+
+  void CoerceValidationToInternal() {
+    if (mType == ffi::WGPUErrorBufferType_Validation) {
+      mType = ffi::WGPUErrorBufferType_Internal;
+    }
+  }
 };
 
 struct PendingSwapChainDrop {
@@ -180,10 +186,9 @@ class PresentationData {
   Maybe<PendingSwapChainDrop> mPendingSwapChainDrop;
 
   const uint32_t mSourcePitch;
-  std::vector<RawId> mUnassignedBufferIds MOZ_GUARDED_BY(mBuffersLock);
-  std::vector<RawId> mAvailableBufferIds MOZ_GUARDED_BY(mBuffersLock);
-  std::vector<RawId> mQueuedBufferIds MOZ_GUARDED_BY(mBuffersLock);
-  Mutex mBuffersLock;
+  std::vector<RawId> mUnassignedBufferIds;
+  std::vector<RawId> mAvailableBufferIds;
+  std::vector<RawId> mQueuedBufferIds;
 
   PresentationData(WebGPUParent* aParent, bool aUseExternalTextureInSwapChain,
                    RawId aDeviceId, RawId aQueueId,
@@ -194,8 +199,7 @@ class PresentationData {
         mDeviceId(aDeviceId),
         mQueueId(aQueueId),
         mDesc(aDesc),
-        mSourcePitch(aSourcePitch),
-        mBuffersLock("WebGPU presentation buffers") {
+        mSourcePitch(aSourcePitch) {
     MOZ_COUNT_CTOR(PresentationData);
 
     for (const RawId id : aBufferIds) {
@@ -354,6 +358,11 @@ ipc::IPCResult WebGPUParent::RecvInstanceRequestAdapter(
   nsAutoCString message(aMessage);
   req->mParent->LoseDevice(deviceId, reason, message);
 
+  auto it = req->mParent->mDeviceFenceHandles.find(deviceId);
+  if (it != req->mParent->mDeviceFenceHandles.end()) {
+    req->mParent->mDeviceFenceHandles.erase(it);
+  }
+
   // We're no longer tracking the memory for this callback, so erase
   // it to ensure we don't leak memory.
   req->mParent->mDeviceLostRequests.erase(deviceId);
@@ -394,7 +403,9 @@ ipc::IPCResult WebGPUParent::RecvAdapterRequestDevice(
   HANDLE handle =
       wgpu_server_get_device_fence_handle(mContext.get(), aDeviceId);
   if (handle) {
-    mFenceHandle = new gfx::FileHandleWrapper(UniqueFileHandle(handle));
+    RefPtr<gfx::FileHandleWrapper> fenceHandle =
+        new gfx::FileHandleWrapper(UniqueFileHandle(handle));
+    mDeviceFenceHandles.emplace(aDeviceId, std::move(fenceHandle));
   }
 #endif
 
@@ -970,20 +981,16 @@ static void ReadbackPresentCallback(ffi::WGPUBufferMapAsyncStatus status,
     return;
   }
 
-  PresentationData* data = req->mData.get();
+  RefPtr<PresentationData> data = req->mData;
   // get the buffer ID
   RawId bufferId;
   {
-    MutexAutoLock lock(data->mBuffersLock);
     bufferId = data->mQueuedBufferIds.back();
     data->mQueuedBufferIds.pop_back();
   }
 
   // Ensure we'll make the bufferId available for reuse
-  auto releaseBuffer = MakeScopeExit([data = RefPtr{data}, bufferId] {
-    MutexAutoLock lock(data->mBuffersLock);
-    data->mAvailableBufferIds.push_back(bufferId);
-  });
+  data->mAvailableBufferIds.push_back(bufferId);
 
   MOZ_LOG(sLogger, LogLevel::Info,
           ("ReadbackPresentCallback for buffer %" PRIu64 " status=%d\n",
@@ -994,15 +1001,16 @@ static void ReadbackPresentCallback(ffi::WGPUBufferMapAsyncStatus status,
     ErrorBuffer getRangeError;
     const auto mapped = ffi::wgpu_server_buffer_get_mapped_range(
         req->mContext, bufferId, 0, bufferSize, getRangeError.ToFFI());
+    getRangeError.CoerceValidationToInternal();
     if (req->mData->mParent) {
       req->mData->mParent->ForwardError(data->mDeviceId, getRangeError);
-    } else if (auto innerError = getRangeError.GetError()) {
-      // If an error occured in get_mapped_range, treat it as an internal error
-      // and crash. The error handling story for something unexpected happening
-      // during the present glue needs to befigured out in a more global way.
+    }
+    if (auto innerError = getRangeError.GetError()) {
       MOZ_LOG(sLogger, LogLevel::Info,
-              ("WebGPU present: buffer get_mapped_range failed: %s\n",
+              ("WebGPU present: buffer get_mapped_range for internal "
+               "presentation readback failed: %s\n",
                innerError->message.get()));
+      return;
     }
 
     MOZ_RELEASE_ASSERT(mapped.length >= bufferSize);
@@ -1029,11 +1037,14 @@ static void ReadbackPresentCallback(ffi::WGPUBufferMapAsyncStatus status,
     }
     ErrorBuffer unmapError;
     wgpu_server_buffer_unmap(req->mContext, bufferId, unmapError.ToFFI());
+    unmapError.CoerceValidationToInternal();
     if (req->mData->mParent) {
       req->mData->mParent->ForwardError(data->mDeviceId, unmapError);
-    } else if (auto innerError = unmapError.GetError()) {
+    }
+    if (auto innerError = unmapError.GetError()) {
       MOZ_LOG(sLogger, LogLevel::Info,
-              ("WebGPU present: buffer unmap failed: %s\n",
+              ("WebGPU present: buffer unmap for internal presentation "
+               "readback failed: %s\n",
                innerError->message.get()));
     }
   } else {
@@ -1083,9 +1094,12 @@ void WebGPUParent::PostExternalTexture(
   const auto index = aExternalTexture->GetSubmissionIndex();
   MOZ_ASSERT(index != 0);
 
+  RefPtr<PresentationData> data = lookup->second.get();
+
   Maybe<gfx::FenceInfo> fenceInfo;
-  if (mFenceHandle) {
-    fenceInfo = Some(gfx::FenceInfo(mFenceHandle, index));
+  auto it = mDeviceFenceHandles.find(data->mDeviceId);
+  if (it != mDeviceFenceHandles.end()) {
+    fenceInfo = Some(gfx::FenceInfo(it->second, index));
   }
 
   Maybe<layers::SurfaceDescriptor> desc =
@@ -1098,8 +1112,6 @@ void WebGPUParent::PostExternalTexture(
   mRemoteTextureOwner->PushTexture(aRemoteTextureId, aOwnerId, aExternalTexture,
                                    size, surfaceFormat, *desc);
 
-  RefPtr<PresentationData> data = lookup->second.get();
-
   auto recycledTexture = mRemoteTextureOwner->GetRecycledExternalTexture(
       size, surfaceFormat, desc->type(), aOwnerId);
   if (recycledTexture) {
@@ -1140,7 +1152,6 @@ ipc::IPCResult WebGPUParent::RecvSwapChainPresent(
 
   // step 1: find an available staging buffer, or create one
   {
-    MutexAutoLock lock(data->mBuffersLock);
     if (!data->mAvailableBufferIds.empty()) {
       bufferId = data->mAvailableBufferIds.back();
       data->mAvailableBufferIds.pop_back();
@@ -1285,7 +1296,6 @@ ipc::IPCResult WebGPUParent::RecvSwapChainDrop(
 
   mPresentationDataMap.erase(lookup);
 
-  MutexAutoLock lock(data->mBuffersLock);
   ipc::ByteBuf dropByteBuf;
   for (const auto bid : data->mUnassignedBufferIds) {
     wgpu_server_buffer_free(bid, ToFFI(&dropByteBuf));
@@ -1351,6 +1361,24 @@ ipc::IPCResult WebGPUParent::RecvCommandEncoderAction(
   return IPC_OK();
 }
 
+ipc::IPCResult WebGPUParent::RecvRenderPass(RawId aEncoderId, RawId aDeviceId,
+                                            const ipc::ByteBuf& aByteBuf) {
+  ErrorBuffer error;
+  ffi::wgpu_server_render_pass(mContext.get(), aEncoderId, ToFFI(&aByteBuf),
+                               error.ToFFI());
+  ForwardError(aDeviceId, error);
+  return IPC_OK();
+}
+
+ipc::IPCResult WebGPUParent::RecvComputePass(RawId aEncoderId, RawId aDeviceId,
+                                             const ipc::ByteBuf& aByteBuf) {
+  ErrorBuffer error;
+  ffi::wgpu_server_compute_pass(mContext.get(), aEncoderId, ToFFI(&aByteBuf),
+                                error.ToFFI());
+  ForwardError(aDeviceId, error);
+  return IPC_OK();
+}
+
 ipc::IPCResult WebGPUParent::RecvBumpImplicitBindGroupLayout(RawId aPipelineId,
                                                              bool aIsCompute,
                                                              uint32_t aIndex,
@@ -1426,8 +1454,6 @@ ipc::IPCResult WebGPUParent::RecvDevicePopErrorScope(
         case dom::GPUErrorFilter::Internal:
           ret.resultType = PopErrorScopeResultType::InternalError;
           break;
-        case dom::GPUErrorFilter::EndGuard_:
-          MOZ_CRASH("Bad GPUErrorFilter");
       }
     }
     return ret;
diff --git a/dom/webgpu/ipc/WebGPUParent.h b/dom/webgpu/ipc/WebGPUParent.h
index 6ad539c21e..a1eb36d723 100644
--- a/dom/webgpu/ipc/WebGPUParent.h
+++ b/dom/webgpu/ipc/WebGPUParent.h
@@ -118,6 +118,10 @@ class WebGPUParent final : public PWebGPUParent, public SupportsWeakPtr {
                                    const ipc::ByteBuf& aByteBuf);
   ipc::IPCResult RecvCommandEncoderAction(RawId aEncoderId, RawId aDeviceId,
                                           const ipc::ByteBuf& aByteBuf);
+  ipc::IPCResult RecvRenderPass(RawId aEncoderId, RawId aDeviceId,
+                                const ipc::ByteBuf& aByteBuf);
+  ipc::IPCResult RecvComputePass(RawId aEncoderId, RawId aDeviceId,
+                                 const ipc::ByteBuf& aByteBuf);
   ipc::IPCResult RecvBumpImplicitBindGroupLayout(RawId aPipelineId,
                                                  bool aIsCompute,
                                                  uint32_t aIndex,
@@ -219,7 +223,7 @@ class WebGPUParent final : public PWebGPUParent, public SupportsWeakPtr {
   nsTHashSet<RawId> mLostDeviceIds;
 
   // Shared handle of wgpu device's fence.
-  RefPtr<gfx::FileHandleWrapper> mFenceHandle;
+  std::unordered_map<RawId, RefPtr<gfx::FileHandleWrapper>> mDeviceFenceHandles;
 
   // Store DeviceLostRequest structs for each device as unique_ptrs mapped
   // to their device ids. We keep these unique_ptrs alive as long as the
diff --git a/dom/webgpu/ipc/WebGPUSerialize.h b/dom/webgpu/ipc/WebGPUSerialize.h
index 8d78d784cb..03f9ee1676 100644
--- a/dom/webgpu/ipc/WebGPUSerialize.h
+++ b/dom/webgpu/ipc/WebGPUSerialize.h
@@ -9,6 +9,7 @@
 #include "WebGPUTypes.h"
 #include "ipc/EnumSerializer.h"
 #include "ipc/IPCMessageUtils.h"
+#include "mozilla/dom/BindingIPCUtils.h"
 #include "mozilla/dom/WebGPUBinding.h"
 #include "mozilla/webgpu/ffi/wgpu.h"
 
@@ -20,7 +21,9 @@ namespace IPC {
       : public ContiguousEnumSerializer<something, something(0), guard> {}
 
 #define DEFINE_IPC_SERIALIZER_DOM_ENUM(something) \
-  DEFINE_IPC_SERIALIZER_ENUM_GUARD(something, something::EndGuard_)
+  template <>                                     \
+  struct ParamTraits<something>                   \
+      : public mozilla::dom::WebIDLEnumSerializer<something> {}
 #define DEFINE_IPC_SERIALIZER_FFI_ENUM(something) \
   DEFINE_IPC_SERIALIZER_ENUM_GUARD(something, something##_Sentinel)