gpu: queue GDS release interrupts behind earlier interrupts

src/graphics/guest_gpu/graphicsRun.cpp

@@ -979,11 +979,7 @@ void CommandProcessor::ReleaseMem(uint32_t data_sel, uint32_t interrupt_selector
 			const auto gds = static_cast<uint32_t>(data);
 			Sync::ReadGds(*m_renderer.GetBufferCache().GetGdsBuffer(),
 			              static_cast<uint32_t*>(address), gds & 0xffffu, gds >> 16u);
-			if (interrupt) {
-				// The GPU is idle, so the interrupt needs no fence.
-				m_renderer.TriggerInterrupt(m_interrupt_event_id, interrupt_context_id);
-			}
-			return;
+			break;
 		}
 		default: EXIT("unknown release_mem data selector: %" PRIu32 "\n", data_sel);
 	}

tests/ShaderRecompilerComputeTests.cpp

@@ -3362,6 +3362,38 @@ public:
                 interrupt_event.ident == 0x20 && interrupt_event.data == 0x789u,
             "kSendIntCtx lost its interrupt or context id");
 
+    // A GDS release interrupt follows the interrupts queued before it, so
+    // neither arrives while the priority thread is parked.
+    std::binary_semaphore priority_parked{0};
+    gpu.SendCommandSync([&] {
+      auto &scheduler = context.GetCommandScheduler();
+      scheduler.Finish();
+      scheduler.DeferPriorityOperation([&] { priority_parked.acquire(); });
+    });
+    uint32_t ordered_gds_label = 0;
+    const auto ordered_first = make_interrupt_packet(0, 2, nullptr, 0, 0xa1u);
+    const auto ordered_gds =
+        make_interrupt_packet(5, 2, &ordered_gds_label, 1u << 16u, 0xa2u);
+    std::array<uint32_t, 16> ordered_commands{};
+    std::copy(ordered_first.begin(), ordered_first.end(), ordered_commands.begin());
+    std::copy(ordered_gds.begin(), ordered_gds.end(), ordered_commands.begin() + 8);
+    gpu.SubmitCompute(0x20, ordered_commands);
+    gpu.WaitForIdle();
+    interrupt_count = 0;
+    const auto parked_wait = wait_for_interrupt(interrupt_event, interrupt_count);
+    priority_parked.release();
+    finish_gpu();
+    LibKernel::EventQueue::KernelEvent second_event{};
+    int second_count = 0;
+    interrupt_count = 0;
+    const auto first_wait = wait_for_interrupt(interrupt_event, interrupt_count);
+    const auto second_wait = wait_for_interrupt(second_event, second_count);
+    Require("GpuCommandLane", "GDS interrupt order",
+            parked_wait == LibKernel::KERNEL_ERROR_ETIMEDOUT && first_wait == 0 &&
+                interrupt_count == 1 && interrupt_event.data == 0xa1u &&
+                second_wait == 0 && second_count == 1 && second_event.data == 0xa2u,
+            "a GDS release interrupt overtook an earlier interrupt");
+
     interrupt_count = 0;
     const auto extra_interrupt_wait =
         wait_for_interrupt(interrupt_event, interrupt_count);