virgl_hw: add allocator-specific bind flags

VIRGL_BIND_SHARED allows external allocators to intercept resource
creation. Reserve the upper byte of bind flags to allow passing
allocator-specific flags, and define a set of such flags for minigbm.

Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

src/virgl_gbm.c

@@ -409,9 +409,30 @@ uint32_t virgl_gbm_convert_flags(uint32_t virgl_bind_flags)
    if (virgl_bind_flags & VIRGL_BIND_LINEAR)
       flags |= GBM_BO_USE_LINEAR;
 
-   return flags;
+   if (virgl_bind_flags & VIRGL_BIND_MINIGBM_CAMERA_WRITE)
+      flags |= GBM_BO_USE_CAMERA_WRITE;
+   if (virgl_bind_flags & VIRGL_BIND_MINIGBM_CAMERA_READ)
+      flags |= GBM_BO_USE_CAMERA_READ;
+   if (virgl_bind_flags & VIRGL_BIND_MINIGBM_HW_VIDEO_DECODER)
+      flags |= GBM_BO_USE_HW_VIDEO_DECODER;
+   if (virgl_bind_flags & VIRGL_BIND_MINIGBM_HW_VIDEO_ENCODER)
+      flags |= GBM_BO_USE_HW_VIDEO_ENCODER;
+
+   if ((virgl_bind_flags & VIRGL_BIND_MINIGBM_PROTECTED) == VIRGL_BIND_MINIGBM_PROTECTED) {
+      flags |= GBM_BO_USE_PROTECTED;
+   } else {
+      if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_READ_OFTEN)
+         flags |= GBM_BO_USE_SW_READ_OFTEN;
+      if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_READ_RARELY)
+         flags |= GBM_BO_USE_SW_READ_RARELY;
+      if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_WRITE_OFTEN)
+         flags |= GBM_BO_USE_SW_WRITE_OFTEN;
+      if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_WRITE_RARELY)
+         flags |= GBM_BO_USE_SW_WRITE_RARELY;
    }
 
+   return flags;
+}
 
 int virgl_gbm_export_query(struct gbm_bo *bo, struct virgl_renderer_export_query *query)
 {

src/virgl_hw.h

@@ -431,6 +431,18 @@ enum virgl_formats {
 
 #define VIRGL_BIND_LINEAR (1 << 22)
 
+#define VIRGL_BIND_SHARED_SUBFLAGS (0xff << 24)
+
+#define VIRGL_BIND_MINIGBM_CAMERA_WRITE (1 << 24)
+#define VIRGL_BIND_MINIGBM_CAMERA_READ (1 << 25)
+#define VIRGL_BIND_MINIGBM_HW_VIDEO_DECODER (1 << 26)
+#define VIRGL_BIND_MINIGBM_HW_VIDEO_ENCODER (1 << 27)
+#define VIRGL_BIND_MINIGBM_SW_READ_OFTEN (1 << 28)
+#define VIRGL_BIND_MINIGBM_SW_READ_RARELY (1 << 29)
+#define VIRGL_BIND_MINIGBM_SW_WRITE_OFTEN (1 << 30)
+#define VIRGL_BIND_MINIGBM_SW_WRITE_RARELY (1 << 31)
+#define VIRGL_BIND_MINIGBM_PROTECTED (0xf << 28) // Mutually exclusive with SW_ flags
+
 struct virgl_caps_bool_set1 {
         unsigned indep_blend_enable:1;
         unsigned indep_blend_func:1;