APPLE_object_purgeable: intel

Implement support for purgeable objects by using the GEM madvise ioctl.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/mesa/drivers/dri/intel/intel_buffer_objects.c

@@ -31,10 +31,12 @@
 #include "main/macros.h"
 #include "main/bufferobj.h"
 
-#include "intel_context.h"
 #include "intel_blit.h"
 #include "intel_buffer_objects.h"
 #include "intel_batchbuffer.h"
+#include "intel_context.h"
+#include "intel_fbo.h"
+#include "intel_mipmap_tree.h"
 #include "intel_regions.h"
 
 static GLboolean
@@ -588,6 +590,126 @@ intel_bufferobj_copy_subdata(GLcontext *ctx,
    intel_batchbuffer_emit_mi_flush(intel->batch);
 }
 
+#if FEATURE_APPLE_object_purgeable
+static GLenum
+intel_buffer_purgeable(GLcontext * ctx,
+                       drm_intel_bo *buffer,
+                       GLenum option)
+{
+   int retained = 0;
+
+   if (buffer != NULL)
+      retained = drm_intel_bo_madvise (buffer, I915_MADV_DONTNEED);
+
+   return retained ? GL_VOLATILE_APPLE : GL_RELEASED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_purgeable(GLcontext * ctx,
+                              struct gl_buffer_object *obj,
+                              GLenum option)
+{
+   struct intel_buffer_object *intel;
+
+   intel = intel_buffer_object (obj);
+   if (intel->buffer != NULL)
+      return intel_buffer_purgeable (ctx, intel->buffer, option);
+
+   if (option == GL_RELEASED_APPLE) {
+      if (intel->sys_buffer != NULL) {
+         free(intel->sys_buffer);
+         intel->sys_buffer = NULL;
+      }
+
+      return GL_RELEASED_APPLE;
+   } else {
+      /* XXX Create the buffer and madvise(MADV_DONTNEED)? */
+      return intel_buffer_purgeable (ctx,
+                                     intel_bufferobj_buffer(intel_context(ctx),
+                                                            intel, INTEL_READ),
+                                     option);
+   }
+}
+
+static GLenum
+intel_texture_object_purgeable(GLcontext * ctx,
+                               struct gl_texture_object *obj,
+                               GLenum option)
+{
+   struct intel_texture_object *intel;
+
+   intel = intel_texture_object(obj);
+   if (intel->mt == NULL || intel->mt->region == NULL)
+      return GL_RELEASED_APPLE;
+
+   return intel_buffer_purgeable (ctx, intel->mt->region->buffer, option);
+}
+
+static GLenum
+intel_render_object_purgeable(GLcontext * ctx,
+                              struct gl_renderbuffer *obj,
+                              GLenum option)
+{
+   struct intel_renderbuffer *intel;
+
+   intel = intel_renderbuffer(obj);
+   if (intel->region == NULL)
+      return GL_RELEASED_APPLE;
+
+   return intel_buffer_purgeable (ctx, intel->region->buffer, option);
+}
+
+static GLenum
+intel_buffer_unpurgeable(GLcontext * ctx,
+                         drm_intel_bo *buffer,
+                         GLenum option)
+{
+   int retained;
+
+   retained = 0;
+   if (buffer != NULL)
+      retained = drm_intel_bo_madvise (buffer, I915_MADV_WILLNEED);
+
+   return retained ? GL_RETAINED_APPLE : GL_UNDEFINED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_unpurgeable(GLcontext * ctx,
+                                struct gl_buffer_object *obj,
+                                GLenum option)
+{
+   return intel_buffer_unpurgeable (ctx, intel_buffer_object (obj)->buffer, option);
+}
+
+static GLenum
+intel_texture_object_unpurgeable(GLcontext * ctx,
+                                 struct gl_texture_object *obj,
+                                 GLenum option)
+{
+   struct intel_texture_object *intel;
+
+   intel = intel_texture_object(obj);
+   if (intel->mt == NULL || intel->mt->region == NULL)
+      return GL_UNDEFINED_APPLE;
+
+   return intel_buffer_unpurgeable (ctx, intel->mt->region->buffer, option);
+}
+
+static GLenum
+intel_render_object_unpurgeable(GLcontext * ctx,
+                                struct gl_renderbuffer *obj,
+                                GLenum option)
+{
+   struct intel_renderbuffer *intel;
+
+   intel = intel_renderbuffer(obj);
+   if (intel->region == NULL)
+      return GL_UNDEFINED_APPLE;
+
+   return intel_buffer_unpurgeable (ctx, intel->region->buffer, option);
+}
+#endif
+
 void
 intelInitBufferObjectFuncs(struct dd_function_table *functions)
 {
@@ -601,4 +723,14 @@ intelInitBufferObjectFuncs(struct dd_function_table *functions)
    functions->FlushMappedBufferRange = intel_bufferobj_flush_mapped_range;
    functions->UnmapBuffer = intel_bufferobj_unmap;
    functions->CopyBufferSubData = intel_bufferobj_copy_subdata;
+
+#if FEATURE_APPLE_object_purgeable
+   functions->BufferObjectPurgeable = intel_buffer_object_purgeable;
+   functions->TextureObjectPurgeable = intel_texture_object_purgeable;
+   functions->RenderObjectPurgeable = intel_render_object_purgeable;
+
+   functions->BufferObjectUnpurgeable = intel_buffer_object_unpurgeable;
+   functions->TextureObjectUnpurgeable = intel_texture_object_unpurgeable;
+   functions->RenderObjectUnpurgeable = intel_render_object_unpurgeable;
+#endif
 }

src/mesa/drivers/dri/intel/intel_extensions.c

@@ -58,6 +58,7 @@
 #define need_GL_EXT_secondary_color
 #define need_GL_EXT_stencil_two_side
 #define need_GL_APPLE_vertex_array_object
+#define need_GL_APPLE_object_purgeable
 #define need_GL_ATI_separate_stencil
 #define need_GL_ATI_envmap_bumpmap
 #define need_GL_NV_point_sprite
@@ -121,6 +122,7 @@ static const struct dri_extension card_extensions[] = {
    { "GL_EXT_texture_lod_bias",           NULL },
    { "GL_3DFX_texture_compression_FXT1",  NULL },
    { "GL_APPLE_client_storage",           NULL },
+   { "GL_APPLE_object_purgeable",         GL_APPLE_object_purgeable_functions },
    { "GL_APPLE_vertex_array_object",      GL_APPLE_vertex_array_object_functions},
    { "GL_MESA_pack_invert",               NULL },
    { "GL_MESA_ycbcr_texture",             NULL },
@@ -182,6 +184,7 @@ static const struct dri_extension arb_oq_extensions[] = {
    { NULL, NULL }
 };
 
+
 static const struct dri_extension fragment_shader_extensions[] = {
    { "GL_ARB_fragment_shader",            NULL },
    { NULL, NULL }