ggml: new backend for Virglrenderer API Remoting acceleration (v2) (#18718)

2026-01-28 17:49:40 +08:00
parent 6ad70c5a77
commit b7feacf7f3
47 changed files with 4711 additions and 0 deletions
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "ggml-backend-impl.h"
+#include "ggml-backend.h"
+#include "ggml-impl.h"
+#include "virtgpu.h"
+
+#include <memory>
+#include <string>
+
+// USE_ALWAYS_TRUE_SUPPORTS_OP: 1 is fast, 0 avoid micro-benchmark crashes
+
+#define USE_ALWAYS_TRUE_SUPPORTS_OP 1
+#define USE_METAL_GUEST_SUPPORTS_OP 0
+
+#define DEV_TO_GPU(name) ((ggml_backend_remoting_device_context *) (name)->context)->gpu
+
+#define BUFFER_TO_GGML_CONTEXT(name) ((ggml_backend_remoting_buffer_context *) (name)->context)
+
+#define BUFFER_TO_APIR_CONTEXT(name) &((ggml_backend_remoting_buffer_context *) (name)->context)->apir_context
+
+#define BUFFER_TO_HOST_HANDLE(name) ((ggml_backend_remoting_buffer_context *) (name)->context)->apir_context.host_handle
+
+#define GET_DEVICE_CONTEXT() (ggml_backend_remoting_device_context *) ggml_backend_remoting_get_device(0)->context
+
+#define BUFT_TO_GPU(name) ((ggml_backend_remoting_device_context *) (name)->device->context)->gpu
+
+struct ggml_backend_remoting_device_context {
+    size_t      device;
+    std::string name;
+    std::string description;
+
+    std::vector<std::tuple<void *, size_t, virtgpu_shmem *>> shared_memory;
+
+    virtgpu * gpu;
+};
+
+struct ggml_backend_remoting_buffer_context {
+    apir_buffer_context_t apir_context;
+
+    virtgpu * gpu;
+
+    void * base;
+
+    bool is_from_ptr;
+};
+
+extern const ggml_backend_buffer_type_i ggml_backend_remoting_buffer_type_interface;
+extern const ggml_backend_device_i      ggml_backend_remoting_device_interface;
+extern const ggml_backend_buffer_i      ggml_backend_remoting_buffer_interface;
+extern const ggml_backend_buffer_type_i ggml_backend_remoting_buffer_from_ptr_type_interface;
+extern const ggml_backend_buffer_i      ggml_backend_remoting_buffer_from_ptr_interface;
+
+ggml_backend_dev_t         ggml_backend_remoting_get_device(size_t device);
+ggml_backend_t             ggml_backend_remoting_device_init(ggml_backend_dev_t dev, const char * params);
+ggml_backend_buffer_type_t ggml_backend_remoting_device_get_buffer_type(ggml_backend_dev_t dev);
+
+static inline apir_buffer_type_host_handle_t ggml_buffer_type_to_apir_handle(ggml_backend_buffer_type_t buft) {
+    // in the backend, the buffer handle is the buffer pointer
+    return (apir_buffer_type_host_handle_t) buft->context;
+}
+
+static inline apir_buffer_host_handle_t ggml_buffer_to_apir_handle(ggml_backend_buffer_t buffer) {
+    if (!buffer->context) {
+        GGML_ABORT("%s: no context available :/", __func__);
+    }
+    return BUFFER_TO_HOST_HANDLE(buffer);
+}