virglrenderer: report structures virglrenderer_execute supports

"out_supported_structure_mask" is a bitmask representing the structures that
virglrenderer knows how to handle for a given "in_stype_version".

Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/virglrenderer.h

@@ -99,8 +99,9 @@ VIRGL_EXPORT int virgl_renderer_get_fd_for_texture2(uint32_t tex_id, int *fd, in
 #define VIRGL_RES_BIND_SHARED        (1 << 20)
 
 enum virgl_renderer_structure_type_v0 {
-   VIRGL_RENDERER_STRUCTURE_TYPE_NONE = 0x00000000,
+   VIRGL_RENDERER_STRUCTURE_TYPE_NONE = 0,
-   VIRGL_RENDERER_STRUCTURE_TYPE_EXPORT_QUERY = 0x00000001,
+   VIRGL_RENDERER_STRUCTURE_TYPE_EXPORT_QUERY = (1 << 0),
+   VIRGL_RENDERER_STRUCTURE_TYPE_SUPPORTED_STRUCTURES = (1 << 1),
 };
 
 struct virgl_renderer_resource_create_args {
@@ -144,6 +145,17 @@ struct virgl_renderer_export_query {
    uint64_t out_modifier;
 };
 
+/*
+ * "out_supported_structures_mask" is a bitmask representing the structures that
+ * virglrenderer knows how to handle for a given "in_stype_version".
+ */
+
+struct virgl_renderer_supported_structures {
+   struct virgl_renderer_hdr hdr;
+   uint32_t in_stype_version;
+   uint32_t out_supported_structures_mask;
+};
+
 /* new API */
 /* This typedef must be kept in sync with vrend_debug.h */
 typedef void (*virgl_debug_callback_type)(const char *fmt, va_list ap);

src/vrend_renderer.c

@@ -9937,19 +9937,14 @@ int vrend_renderer_get_poll_fd(void)
    return vrend_state.eventfd;
 }
 
-int vrend_renderer_execute(void *execute_args, uint32_t execute_size)
+static int vrend_renderer_export_query(void *execute_args, uint32_t execute_size)
 {
-   /*
-    * This function only supports VIRGL_RENDERER_STRUCTURE_TYPE_RESOURCE_QUERY currently.
-    */
    struct vrend_resource *res;
    struct virgl_renderer_export_query *export_query = execute_args;
    if (execute_size != sizeof(struct virgl_renderer_export_query))
       return -EINVAL;
 
-   if (export_query->hdr.stype != VIRGL_RENDERER_STRUCTURE_TYPE_EXPORT_QUERY ||
+   if (export_query->hdr.size != sizeof(struct virgl_renderer_export_query))
-       export_query->hdr.stype_version != 0 ||
-       export_query->hdr.size != sizeof(struct virgl_renderer_export_query))
       return -EINVAL;
 
    res = vrend_resource_lookup(export_query->in_resource_id, 0);
@@ -9972,3 +9967,39 @@ int vrend_renderer_execute(void *execute_args, uint32_t execute_size)
 
    return 0;
 }
+
+static int vrend_renderer_supported_structures(void *execute_args, uint32_t execute_size)
+{
+   struct virgl_renderer_supported_structures *supported_structures = execute_args;
+   if (execute_size != sizeof(struct virgl_renderer_supported_structures))
+      return -EINVAL;
+
+   if (supported_structures->hdr.size != sizeof(struct virgl_renderer_supported_structures))
+      return -EINVAL;
+
+   if (supported_structures->in_stype_version == 0) {
+      supported_structures->out_supported_structures_mask =
+         VIRGL_RENDERER_STRUCTURE_TYPE_EXPORT_QUERY |
+         VIRGL_RENDERER_STRUCTURE_TYPE_SUPPORTED_STRUCTURES;
+   } else {
+      supported_structures->out_supported_structures_mask = 0;
+   }
+
+   return 0;
+}
+
+int vrend_renderer_execute(void *execute_args, uint32_t execute_size)
+{
+   struct virgl_renderer_hdr *hdr = execute_args;
+   if (hdr->stype_version != 0)
+      return -EINVAL;
+
+   switch (hdr->stype) {
+      case VIRGL_RENDERER_STRUCTURE_TYPE_SUPPORTED_STRUCTURES:
+         return vrend_renderer_supported_structures(execute_args, execute_size);
+      case VIRGL_RENDERER_STRUCTURE_TYPE_EXPORT_QUERY:
+         return vrend_renderer_export_query(execute_args, execute_size);
+      default:
+         return -EINVAL;
+   }
+}