i965: Record mipmap resolver for unmapping

When mapping a region of the mipmap_tree, record which complementary
method to use to unmap it afterwards. By doing so we can avoid
duplicating the decision tree used when mapping and thereby eliminate
trivial errors that can be introduced if the two if-chains become out of
sync.

Signed-off-by: Chris Wilson <[email protected]>
Reviewed-by: Scott D Phillips <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

2 files changed, 22 insertions, 17 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index c0fe3c6623d..b9a564552df 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -3066,7 +3066,10 @@ intel_miptree_unmap_raw(struct intel_mipmap_tree *mt)
 }
 
 static void
-intel_miptree_unmap_gtt(struct intel_mipmap_tree *mt)
+intel_miptree_unmap_gtt(struct brw_context *brw,
+                        struct intel_mipmap_tree *mt,
+                        struct intel_miptree_map *map,
+                        unsigned int level, unsigned int slice)
 {
    intel_miptree_unmap_raw(mt);
 }
@@ -3116,6 +3119,8 @@ intel_miptree_map_gtt(struct brw_context *brw,
        map->x, map->y, map->w, map->h,
        mt, _mesa_get_format_name(mt->format),
        x, y, map->ptr, map->stride);
+
+   map->unmap = intel_miptree_unmap_gtt;
 }
 
 static void
@@ -3181,6 +3186,7 @@ intel_miptree_map_blit(struct brw_context *brw,
        mt, _mesa_get_format_name(mt->format),
        level, slice, map->ptr, map->stride);
 
+   map->unmap = intel_miptree_unmap_blit;
    return;
 
 fail:
@@ -3262,6 +3268,8 @@ intel_miptree_map_movntdqa(struct brw_context *brw,
    }
 
    intel_miptree_unmap_raw(mt);
+
+   map->unmap = intel_miptree_unmap_movntdqa;
 }
 #endif
 
@@ -3338,6 +3346,8 @@ intel_miptree_map_s8(struct brw_context *brw,
 	  map->x, map->y, map->w, map->h,
 	  mt, map->ptr, map->stride);
    }
+
+   map->unmap = intel_miptree_unmap_s8;
 }
 
 static void
@@ -3390,6 +3400,7 @@ intel_miptree_map_etc(struct brw_context *brw,
    map->buffer = malloc(_mesa_format_image_size(mt->etc_format,
                                                 map->w, map->h, 1));
    map->ptr = map->buffer;
+   map->unmap = intel_miptree_unmap_etc;
 }
 
 /**
@@ -3531,6 +3542,8 @@ intel_miptree_map_depthstencil(struct brw_context *brw,
 	  map->x, map->y, map->w, map->h,
 	  mt, map->ptr, map->stride);
    }
+
+   map->unmap = intel_miptree_unmap_depthstencil;
 }
 
 /**
@@ -3702,22 +3715,8 @@ intel_miptree_unmap(struct brw_context *brw,
    DBG("%s: mt %p (%s) level %d slice %d\n", __func__,
        mt, _mesa_get_format_name(mt->format), level, slice);
 
-   if (mt->format == MESA_FORMAT_S_UINT8) {
-      intel_miptree_unmap_s8(brw, mt, map, level, slice);
-   } else if (mt->etc_format != MESA_FORMAT_NONE &&
-              !(map->mode & BRW_MAP_DIRECT_BIT)) {
-      intel_miptree_unmap_etc(brw, mt, map, level, slice);
-   } else if (mt->stencil_mt && !(map->mode & BRW_MAP_DIRECT_BIT)) {
-      intel_miptree_unmap_depthstencil(brw, mt, map, level, slice);
-   } else if (map->linear_mt) {
-      intel_miptree_unmap_blit(brw, mt, map, level, slice);
-#if defined(USE_SSE41)
-   } else if (map->buffer && cpu_has_sse4_1) {
-      intel_miptree_unmap_movntdqa(brw, mt, map, level, slice);
-#endif
-   } else {
-      intel_miptree_unmap_gtt(mt);
-   }
+   if (map->unmap)
+	   map->unmap(brw, mt, map, level, slice);
 
    intel_miptree_release_map(mt, level, slice);
 }
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index e99ea44b809..8cea562dfa4 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -88,6 +88,12 @@ struct intel_miptree_map {
    void *ptr;
    /** Stride of the mapping. */
    int stride;
+
+   void (*unmap)(struct brw_context *brw,
+                 struct intel_mipmap_tree *mt,
+                 struct intel_miptree_map *map,
+                 unsigned int level,
+                 unsigned int slice);
 };
 
 /**