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 +1,119 @@
+#include "ggml-remoting.h"
+
+#define BUFFER_TO_GPU(name) ((ggml_backend_remoting_buffer_context *) (name)->context)->gpu
+
+static void * ggml_backend_remoting_buffer_get_base(ggml_backend_buffer_t buffer) {
+    ggml_backend_remoting_buffer_context * context = (ggml_backend_remoting_buffer_context *) buffer->context;
+    if (context->base) {
+        return context->base;
+    }
+
+    context->base = apir_buffer_get_base(BUFFER_TO_GPU(buffer), BUFFER_TO_APIR_CONTEXT(buffer));
+
+    return context->base;
+}
+
+static void ggml_backend_remoting_buffer_set_tensor(ggml_backend_buffer_t buffer,
+                                                    ggml_tensor *         tensor,
+                                                    const void *          data,
+                                                    size_t                offset,
+                                                    size_t                size) {
+    virtgpu * gpu = BUFFER_TO_GPU(buffer);
+
+    ggml_backend_remoting_buffer_context * context = BUFFER_TO_GGML_CONTEXT(buffer);
+    if (context->is_from_ptr) {
+        memcpy((char *) tensor->data + offset, data, size);
+    } else {
+        apir_buffer_set_tensor(gpu, BUFFER_TO_APIR_CONTEXT(buffer), tensor, data, offset, size);
+    }
+
+    return;
+}
+
+static void ggml_backend_remoting_buffer_get_tensor(ggml_backend_buffer_t buffer,
+                                                    const ggml_tensor *   tensor,
+                                                    void *                data,
+                                                    size_t                offset,
+                                                    size_t                size) {
+    virtgpu *                              gpu     = BUFFER_TO_GPU(buffer);
+    ggml_backend_remoting_buffer_context * context = BUFFER_TO_GGML_CONTEXT(buffer);
+    if (context->is_from_ptr) {
+        memcpy(data, (const char *) tensor->data + offset, size);
+    } else {
+        apir_buffer_get_tensor(gpu, BUFFER_TO_APIR_CONTEXT(buffer), tensor, data, offset, size);
+    }
+}
+
+static void ggml_backend_remoting_buffer_set_tensor_from_ptr(ggml_backend_buffer_t buffer,
+                                                             ggml_tensor *         tensor,
+                                                             const void *          data,
+                                                             size_t                offset,
+                                                             size_t                size) {
+    UNUSED(buffer);
+
+    memcpy((char *) tensor->data + offset, data, size);
+
+    return;
+}
+
+static void ggml_backend_remoting_buffer_get_tensor_from_ptr(ggml_backend_buffer_t buffer,
+                                                             const ggml_tensor *   tensor,
+                                                             void *                data,
+                                                             size_t                offset,
+                                                             size_t                size) {
+    UNUSED(buffer);
+
+    memcpy(data, (const char *) tensor->data + offset, size);
+}
+
+static bool ggml_backend_remoting_buffer_cpy_tensor(ggml_backend_buffer_t buffer,
+                                                    const ggml_tensor *   src,
+                                                    ggml_tensor *         dst) {
+    virtgpu * gpu = BUFFER_TO_GPU(buffer);
+
+    bool ret = apir_buffer_cpy_tensor(gpu, BUFFER_TO_APIR_CONTEXT(buffer), src, dst);
+
+    return ret;
+}
+
+static void ggml_backend_remoting_buffer_clear(ggml_backend_buffer_t buffer, uint8_t value) {
+    virtgpu * gpu = BUFFER_TO_GPU(buffer);
+
+    apir_buffer_clear(gpu, BUFFER_TO_APIR_CONTEXT(buffer), value);
+
+    return;
+}
+
+static void ggml_backend_remoting_buffer_free_buffer(ggml_backend_buffer_t buffer) {
+    virtgpu * gpu = BUFFER_TO_GPU(buffer);
+
+    apir_buffer_free_buffer(gpu, BUFFER_TO_APIR_CONTEXT(buffer));
+
+    ggml_backend_remoting_buffer_context * context = BUFFER_TO_GGML_CONTEXT(buffer);
+    free(context);
+    buffer->context = NULL;
+}
+
+const ggml_backend_buffer_i ggml_backend_remoting_buffer_interface = {
+    /* .free_buffer     = */ ggml_backend_remoting_buffer_free_buffer,
+    /* .get_base        = */ ggml_backend_remoting_buffer_get_base,
+    /* .init_tensor     = */ NULL,
+    /* .memset_tensor   = */ NULL,
+    /* .set_tensor      = */ ggml_backend_remoting_buffer_set_tensor,
+    /* .get_tensor      = */ ggml_backend_remoting_buffer_get_tensor,
+    /* .cpy_tensor      = */ ggml_backend_remoting_buffer_cpy_tensor,
+    /* .clear           = */ ggml_backend_remoting_buffer_clear,
+    /* .reset           = */ NULL,
+};
+
+const ggml_backend_buffer_i ggml_backend_remoting_buffer_from_ptr_interface = {
+    /* .free_buffer     = */ ggml_backend_remoting_buffer_free_buffer,
+    /* .get_base        = */ ggml_backend_remoting_buffer_get_base,
+    /* .init_tensor     = */ NULL,
+    /* .memset_tensor   = */ NULL,
+    /* .set_tensor      = */ ggml_backend_remoting_buffer_set_tensor_from_ptr,
+    /* .get_tensor      = */ ggml_backend_remoting_buffer_get_tensor_from_ptr,
+    /* .cpy_tensor      = */ ggml_backend_remoting_buffer_cpy_tensor,
+    /* .clear           = */ ggml_backend_remoting_buffer_clear,
+    /* .reset           = */ NULL,
+};