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

2026-01-28 10:49:40 +01:00
parent 6ad70c5a77
commit b7feacf7f3
47 changed files with 4711 additions and 0 deletions
@@ -0,0 +1,69 @@
+#include "ggml-remoting.h"
+#include "../../include/ggml-virtgpu.h"
+
+static const char * ggml_backend_remoting_get_name(ggml_backend_t backend) {
+    UNUSED(backend);
+
+    return "API Remoting backend";
+}
+
+static void ggml_backend_remoting_free(ggml_backend_t backend) {
+    delete backend;
+}
+
+static ggml_status ggml_backend_remoting_graph_compute(ggml_backend_t backend, ggml_cgraph * cgraph) {
+    virtgpu * gpu = DEV_TO_GPU(backend->device);
+
+    return apir_backend_graph_compute(gpu, cgraph);
+}
+
+static void ggml_backend_remoting_graph_optimize(ggml_backend_t backend, ggml_cgraph * cgraph) {
+    virtgpu * gpu = DEV_TO_GPU(backend->device);
+#if true
+    UNUSED(gpu);
+    UNUSED(cgraph);
+#else
+    // not working yet
+
+    apir_backend_graph_optimize(gpu, cgraph);
+#endif
+}
+
+static ggml_backend_i ggml_backend_remoting_interface = {
+    /* .get_name                = */ ggml_backend_remoting_get_name,
+    /* .free                    = */ ggml_backend_remoting_free,
+    /* .set_tensor_async        = */ NULL,  // ggml_backend_remoting_set_tensor_async,
+    /* .get_tensor_async        = */ NULL,  // ggml_backend_remoting_get_tensor_async,
+    /* .cpy_tensor_async        = */ NULL,  // ggml_backend_remoting_cpy_tensor_async,
+    /* .synchronize             = */ NULL,  // ggml_backend_remoting_synchronize,
+    /* .graph_plan_create       = */ NULL,
+    /* .graph_plan_free         = */ NULL,
+    /* .graph_plan_update       = */ NULL,
+    /* .graph_plan_compute      = */ NULL,
+    /* .graph_compute           = */ ggml_backend_remoting_graph_compute,
+    /* .event_record            = */ NULL,
+    /* .event_wait              = */ NULL,
+    /* .graph_optimize          = */ ggml_backend_remoting_graph_optimize,
+};
+
+static ggml_guid_t ggml_backend_remoting_guid() {
+    static ggml_guid guid = { 0xb8, 0xf7, 0x4f, 0x86, 0x14, 0x03, 0x86, 0x02,
+                              0x91, 0xc8, 0xdd, 0xe9, 0x02, 0x3f, 0xc0, 0x2b };
+
+    return &guid;
+}
+
+ggml_backend_t ggml_backend_remoting_device_init(ggml_backend_dev_t dev, const char * params) {
+    UNUSED(params);
+
+    ggml_backend_remoting_device_context * ctx = (ggml_backend_remoting_device_context *) dev->context;
+
+    ggml_backend_t remoting_backend = new ggml_backend{
+        /* .guid      = */ ggml_backend_remoting_guid(),
+        /* .interface = */ ggml_backend_remoting_interface,
+        /* .device    = */ ggml_backend_reg_dev_get(ggml_backend_virtgpu_reg(), ctx->device),
+        /* .context   = */ ctx,
+    };
+
+    return remoting_backend;
+}