intel: Add 'mode' param to intel_region_map

The 'mode' param is a bitset of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT.

A future commit will perform buffer resolves in intel_region_map().  So,
even though the access mode is irrelevant to the GTT, the extra
information allows us to intelligently avoid unneccessary buffer resolves.

Signed-off-by: Chad Versace <chad@chad-versace.us>

7 files changed, 34 insertions, 16 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index d96e751..bf6a0f6 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -395,8 +395,8 @@ intel_miptree_copy_teximage(struct intel_context *intel,
 
 	    fallback_debug("miptree validate blit for %s failed\n",
 			   _mesa_get_format_name(intelImage->base.Base.TexFormat));
-	    dst = intel_region_map(intel, dst_mt->region);
-	    src = intel_region_map(intel, src_mt->region);
+	    dst = intel_region_map(intel, dst_mt->region, GL_MAP_WRITE_BIT);
+	    src = intel_region_map(intel, src_mt->region, GL_MAP_READ_BIT);
 
 	    _mesa_copy_rect(dst,
 			    dst_mt->cpp,
@@ -410,7 +410,7 @@ intel_miptree_copy_teximage(struct intel_context *intel,
 	    intel_region_unmap(intel, src_mt->region);
 	 }
       } else {
-	 dst = intel_region_map(intel, dst_mt->region);
+	 dst = intel_region_map(intel, dst_mt->region, GL_MAP_WRITE_BIT);
 
 	 DBG("validate upload mt %p -> mt %p %d,%d/%d (%dx%d)\n",
 	     src,
diff --git a/src/mesa/drivers/dri/intel/intel_regions.c b/src/mesa/drivers/dri/intel/intel_regions.c
index 5518b3b..0b9ffe8 100644
--- a/src/mesa/drivers/dri/intel/intel_regions.c
+++ b/src/mesa/drivers/dri/intel/intel_regions.c
@@ -109,7 +109,8 @@ debug_backtrace(void)
 /* XXX: Thread safety?
  */
 GLubyte *
-intel_region_map(struct intel_context *intel, struct intel_region *region)
+intel_region_map(struct intel_context *intel, struct intel_region *region,
+                 GLbitfield mode)
 {
    /* We have the region->map_refcount controlling mapping of the BO because
     * in software fallbacks we may end up mapping the same buffer multiple
diff --git a/src/mesa/drivers/dri/intel/intel_regions.h b/src/mesa/drivers/dri/intel/intel_regions.h
index 78309d2..06e76ac 100644
--- a/src/mesa/drivers/dri/intel/intel_regions.h
+++ b/src/mesa/drivers/dri/intel/intel_regions.h
@@ -95,10 +95,14 @@ void intel_region_release(struct intel_region **ib);
 
 void intel_recreate_static_regions(struct intel_context *intel);
 
-/* Map/unmap regions.  This is refcounted also: 
+/**
+ * Map/unmap regions.  This is refcounted also:
+ *
+ * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
  */
 GLubyte *intel_region_map(struct intel_context *intel,
-                          struct intel_region *ib);
+                          struct intel_region *ib,
+                          GLbitfield mode);
 
 void intel_region_unmap(struct intel_context *intel, struct intel_region *ib);
 
diff --git a/src/mesa/drivers/dri/intel/intel_span.c b/src/mesa/drivers/dri/intel/intel_span.c
index 8da3b11..bdc4a0e 100644
--- a/src/mesa/drivers/dri/intel/intel_span.c
+++ b/src/mesa/drivers/dri/intel/intel_span.c
@@ -321,7 +321,8 @@ intelSpanRenderStart(struct gl_context * ctx)
          struct gl_texture_object *texObj = ctx->Texture.Unit[i]._Current;
 
          intel_finalize_mipmap_tree(intel, i);
-         intel_tex_map_images(intel, intel_texture_object(texObj));
+         intel_tex_map_images(intel, intel_texture_object(texObj),
+                              GL_MAP_READ_BIT | GL_MAP_WRITE_BIT);
       }
    }
 
@@ -379,7 +380,8 @@ intel_map_vertex_shader_textures(struct gl_context *ctx)
 	  ctx->VertexProgram._Current->Base.TexturesUsed[i] != 0) {
          struct gl_texture_object *texObj = ctx->Texture.Unit[i]._Current;
 
-         intel_tex_map_images(intel, intel_texture_object(texObj));
+         intel_tex_map_images(intel, intel_texture_object(texObj),
+                              GL_MAP_READ_BIT | GL_MAP_WRITE_BIT);
       }
    }
 }
diff --git a/src/mesa/drivers/dri/intel/intel_tex.c b/src/mesa/drivers/dri/intel/intel_tex.c
index fff2dae..054ae42 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.c
+++ b/src/mesa/drivers/dri/intel/intel_tex.c
@@ -125,6 +125,7 @@ intel_free_texture_image_buffer(struct gl_context * ctx,
 /**
  * Map texture memory/buffer into user space.
  * Note: the region of interest parameters are ignored here.
+ * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
  * \param mapOut  returns start of mapping of region of interest
  * \param rowStrideOut  returns row stride in bytes
  */
@@ -164,7 +165,7 @@ intel_map_texture_image(struct gl_context *ctx,
    y /= bh;
 
    if (likely(mt)) {
-      void *base = intel_region_map(intel, mt->region);
+      void *base = intel_region_map(intel, mt->region, mode);
       unsigned int image_x, image_y;
 
       intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
diff --git a/src/mesa/drivers/dri/intel/intel_tex.h b/src/mesa/drivers/dri/intel/intel_tex.h
index 85aff5f..8450f29 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.h
+++ b/src/mesa/drivers/dri/intel/intel_tex.h
@@ -57,14 +57,16 @@ GLuint intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit);
 
 void intel_tex_map_level_images(struct intel_context *intel,
 				struct intel_texture_object *intelObj,
-				int level);
+				int level,
+				GLbitfield mode);
 
 void intel_tex_unmap_level_images(struct intel_context *intel,
 				  struct intel_texture_object *intelObj,
 				  int level);
 
 void intel_tex_map_images(struct intel_context *intel,
-                          struct intel_texture_object *intelObj);
+                          struct intel_texture_object *intelObj,
+                          GLbitfield mode);
 
 void intel_tex_unmap_images(struct intel_context *intel,
                             struct intel_texture_object *intelObj);
diff --git a/src/mesa/drivers/dri/intel/intel_tex_validate.c b/src/mesa/drivers/dri/intel/intel_tex_validate.c
index 1782792..4012400 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_validate.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_validate.c
@@ -124,9 +124,13 @@ intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
    return true;
 }
 
+/**
+ * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
+ */
 static void
 intel_tex_map_image_for_swrast(struct intel_context *intel,
-			       struct intel_texture_image *intel_image)
+			       struct intel_texture_image *intel_image,
+			       GLbitfield mode)
 {
    int level = intel_image->base.Base.Level;
    int face = intel_image->base.Base.Face;
@@ -163,7 +167,7 @@ intel_tex_map_image_for_swrast(struct intel_context *intel,
 
       DBG("%s \n", __FUNCTION__);
 
-      intel_image->base.Base.Data = intel_region_map(intel, mt->region);
+      intel_image->base.Base.Data = intel_region_map(intel, mt->region, mode);
    } else {
       assert(mt->level[level].depth == 1);
       intel_miptree_get_image_offset(mt, level, face, 0, &x, &y);
@@ -172,7 +176,7 @@ intel_tex_map_image_for_swrast(struct intel_context *intel,
       DBG("%s: (%d,%d) -> (%d, %d)/%d\n",
 	  __FUNCTION__, face, level, x, y, mt->region->pitch * mt->cpp);
 
-      intel_image->base.Base.Data = intel_region_map(intel, mt->region) +
+      intel_image->base.Base.Data = intel_region_map(intel, mt->region, mode) +
 	 (x + y * mt->region->pitch) * mt->cpp;
    }
 
@@ -189,9 +193,13 @@ intel_tex_unmap_image_for_swrast(struct intel_context *intel,
    }
 }
 
+/**
+ * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
+ */
 void
 intel_tex_map_images(struct intel_context *intel,
-		     struct intel_texture_object *intelObj)
+		     struct intel_texture_object *intelObj,
+		     GLbitfield mode)
 {
    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
    int i, face;
@@ -203,7 +211,7 @@ intel_tex_map_images(struct intel_context *intel,
 	 struct intel_texture_image *intel_image =
 	    intel_texture_image(intelObj->base.Image[face][i]);
 
-	 intel_tex_map_image_for_swrast(intel, intel_image);
+	 intel_tex_map_image_for_swrast(intel, intel_image, mode);
       }
    }
 }