svga: invalidate new surface before it is bound to a render target view

Invalidate a "new" surface before it is bound to a render target view or
depth stencil view in order to avoid the unnecessary host side copy
of the surface data before it is rendered to.
Note that, recycled surface is already invalidated before it is reused.

Reviewed-by: Brian Paul <brianp@vmware.com>

src/gallium/drivers/svga/svga_resource_buffer_upload.c

@@ -146,6 +146,8 @@ svga_buffer_create_host_surface(struct svga_screen *ss,
    assert(!sbuf->user);
 
    if (!sbuf->handle) {
+      boolean validated;
+
       sbuf->key.flags = 0;
 
       sbuf->key.format = SVGA3D_BUFFER;
@@ -187,7 +189,8 @@ svga_buffer_create_host_surface(struct svga_screen *ss,
                sbuf->b.b.width0);
 
       sbuf->handle = svga_screen_surface_create(ss, sbuf->b.b.bind,
-                                                sbuf->b.b.usage, &sbuf->key);
+                                                sbuf->b.b.usage,
+                                                &validated, &sbuf->key);
       if (!sbuf->handle)
          return PIPE_ERROR_OUT_OF_MEMORY;
 

src/gallium/drivers/svga/svga_resource_texture.c

@@ -1102,7 +1102,8 @@ svga_texture_create(struct pipe_screen *screen,
 
    SVGA_DBG(DEBUG_DMA, "surface_create for texture\n", tex->handle);
    tex->handle = svga_screen_surface_create(svgascreen, bindings,
-                                            tex->b.b.usage, &tex->key);
+                                            tex->b.b.usage,
+                                            &tex->validated, &tex->key);
    if (!tex->handle) {
       goto fail;
    }

src/gallium/drivers/svga/svga_resource_texture.h

@@ -77,6 +77,13 @@ struct svga_texture
     */
    struct svga_winsys_surface *handle;
 
+   /**
+    * Whether the host side surface is validated, either through the
+    * InvalidateGBSurface command or after the surface is updated
+    * or rendered to.
+    */
+   boolean validated;
+
    /**
     * Whether the host side surface is imported and not created by this
     * driver.
@@ -195,6 +202,7 @@ svga_define_texture_level(struct svga_texture *tex,
 {
    check_face_level(tex, face, level);
    tex->defined[face] |= 1 << level;
+   tex->validated = TRUE;
 }
 
 
@@ -213,6 +221,7 @@ svga_set_texture_rendered_to(struct svga_texture *tex,
 {
    check_face_level(tex, face, level);
    tex->rendered_to[face] |= 1 << level;
+   tex->validated = TRUE;
 }
 
 

src/gallium/drivers/svga/svga_screen_cache.c

@@ -433,10 +433,12 @@ svga_screen_cache_init(struct svga_screen *svgascreen)
  * allocate a new surface.
  * \param bind_flags  bitmask of PIPE_BIND_x flags
  * \param usage  one of PIPE_USAGE_x values
+ * \param validated return True if the surface is a reused surface
  */
 struct svga_winsys_surface *
 svga_screen_surface_create(struct svga_screen *svgascreen,
                            unsigned bind_flags, enum pipe_resource_usage usage,
+                           boolean *validated,
                            struct svga_host_surface_cache_key *key)
 {
    struct svga_winsys_screen *sws = svgascreen->sws;
@@ -510,6 +512,7 @@ svga_screen_surface_create(struct svga_screen *svgascreen,
                      key->numMipLevels,
                      key->numFaces,
                      key->arraySize);
+         *validated = TRUE;
       }
    }
 
@@ -536,6 +539,8 @@ svga_screen_surface_create(struct svga_screen *svgascreen,
                   key->size.width,
                   key->size.height,
                   key->size.depth);
+
+      *validated = FALSE;
    }
 
    return handle;

src/gallium/drivers/svga/svga_screen_cache.h

@@ -145,6 +145,7 @@ svga_screen_cache_init(struct svga_screen *svgascreen);
 struct svga_winsys_surface *
 svga_screen_surface_create(struct svga_screen *svgascreen,
                            unsigned bind_flags, enum pipe_resource_usage usage,
+                           boolean *validated,
                            struct svga_host_surface_cache_key *key);
 
 void

src/gallium/drivers/svga/svga_surface.c

@@ -120,6 +120,7 @@ svga_texture_view_surface(struct svga_context *svga,
    struct svga_winsys_surface *handle;
    uint32_t i, j;
    unsigned z_offset = 0;
+   boolean validated;
 
    SVGA_DBG(DEBUG_PERF,
             "svga: Create surface view: layer %d zslice %d mips %d..%d\n",
@@ -156,7 +157,8 @@ svga_texture_view_surface(struct svga_context *svga,
    }
 
    SVGA_DBG(DEBUG_DMA, "surface_create for texture view\n");
-   handle = svga_screen_surface_create(ss, bind_flags, PIPE_USAGE_DEFAULT, key);
+   handle = svga_screen_surface_create(ss, bind_flags, PIPE_USAGE_DEFAULT,
+                                       &validated, key);
    if (!handle) {
       key->cachable = 0;
       return NULL;
@@ -434,6 +436,23 @@ svga_validate_surface_view(struct svga_context *svga, struct svga_surface *s)
    if (s && s->view_id == SVGA3D_INVALID_ID) {
       SVGA3dResourceType resType;
       SVGA3dRenderTargetViewDesc desc;
+      struct svga_texture *stex = svga_texture(s->base.texture);
+
+      if (stex->validated == FALSE) {
+         assert(stex->handle);
+
+         /* We are about to render into a surface that has not been validated.
+          * First invalidate the surface so that the device does not
+          * need to update the host-side copy with the invalid
+          * content when the associated mob is first bound to the surface.
+          */
+         ret = SVGA3D_InvalidateGBSurface(svga->swc, stex->handle);
+         if (ret != PIPE_OK) {
+            s = NULL;
+            goto done;
+         }
+         stex->validated = TRUE;
+      }
 
       desc.tex.mipSlice = s->real_level;
       desc.tex.firstArraySlice = s->real_layer + s->real_zslice;
@@ -481,6 +500,7 @@ svga_validate_surface_view(struct svga_context *svga, struct svga_surface *s)
       }
    }
    
+done:
    SVGA_STATS_TIME_POP(svga_sws(svga));
 
    return s ? &s->base : NULL;