glsl: lower mediump temporaries to 16 bits except structures (v2)
[mesa.git] / src / mesa / main / bufferobj.c
index 4afa2ee67798f705039c20755adbc266aaa9c3f6..db5fdaf6075e99cb617d08ccac42a3e616436883 100644 (file)
 #include "glheader.h"
 #include "enums.h"
 #include "hash.h"
-#include "imports.h"
 #include "context.h"
 #include "bufferobj.h"
+#include "externalobjects.h"
 #include "mtypes.h"
 #include "teximage.h"
 #include "glformats.h"
 #include "texstore.h"
 #include "transformfeedback.h"
 #include "varray.h"
+#include "util/u_atomic.h"
+#include "util/u_memory.h"
 
 
 /* Debug flags */
@@ -71,11 +73,11 @@ buffer_usage_warning(struct gl_context *ctx, GLuint *id, const char *fmt, ...)
    va_list args;
 
    va_start(args, fmt);
-   _mesa_gl_vdebug(ctx, id,
-                   MESA_DEBUG_SOURCE_API,
-                   MESA_DEBUG_TYPE_PERFORMANCE,
-                   MESA_DEBUG_SEVERITY_MEDIUM,
-                   fmt, args);
+   _mesa_gl_vdebugf(ctx, id,
+                    MESA_DEBUG_SOURCE_API,
+                    MESA_DEBUG_TYPE_PERFORMANCE,
+                    MESA_DEBUG_SEVERITY_MEDIUM,
+                    fmt, args);
    va_end(args);
 }
 
@@ -103,16 +105,31 @@ static struct gl_buffer_object DummyBufferObject;
 static inline struct gl_buffer_object **
 get_buffer_target(struct gl_context *ctx, GLenum target)
 {
-   /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0.
-    */
-   if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx)
-       && target != GL_ARRAY_BUFFER && target != GL_ELEMENT_ARRAY_BUFFER)
-      return NULL;
+   /* Other targets are only supported in desktop OpenGL and OpenGL ES 3.0. */
+   if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx)) {
+      switch (target) {
+      case GL_ARRAY_BUFFER:
+      case GL_ELEMENT_ARRAY_BUFFER:
+         break;
+      case GL_PIXEL_PACK_BUFFER:
+      case GL_PIXEL_UNPACK_BUFFER:
+         if (!ctx->Extensions.EXT_pixel_buffer_object)
+            return NULL;
+         break;
+      default:
+         return NULL;
+      }
+   }
 
    switch (target) {
    case GL_ARRAY_BUFFER_ARB:
+      if (ctx->Array.ArrayBufferObj)
+         ctx->Array.ArrayBufferObj->UsageHistory |= USAGE_ARRAY_BUFFER;
       return &ctx->Array.ArrayBufferObj;
    case GL_ELEMENT_ARRAY_BUFFER_ARB:
+      if (ctx->Array.VAO->IndexBufferObj)
+         ctx->Array.VAO->IndexBufferObj->UsageHistory
+            |= USAGE_ELEMENT_ARRAY_BUFFER;
       return &ctx->Array.VAO->IndexBufferObj;
    case GL_PIXEL_PACK_BUFFER_EXT:
       return &ctx->Pack.BufferObj;
@@ -127,8 +144,7 @@ get_buffer_target(struct gl_context *ctx, GLenum target)
          return &ctx->QueryBuffer;
       break;
    case GL_DRAW_INDIRECT_BUFFER:
-      if ((ctx->API == API_OPENGL_CORE &&
-           ctx->Extensions.ARB_draw_indirect) ||
+      if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_draw_indirect) ||
            _mesa_is_gles31(ctx)) {
          return &ctx->DrawIndirectBuffer;
       }
@@ -200,7 +216,7 @@ get_buffer(struct gl_context *ctx, const char *func, GLenum target,
       return NULL;
    }
 
-   if (!_mesa_is_bufferobj(*bufObj)) {
+   if (!*bufObj) {
       _mesa_error(ctx, error, "%s(no buffer bound)", func);
       return NULL;
    }
@@ -345,7 +361,8 @@ buffer_object_subdata_range_good(struct gl_context *ctx,
 
 /**
  * Test the format and type parameters and set the GL error code for
- * \c glClearBufferData and \c glClearBufferSubData.
+ * \c glClearBufferData, \c glClearNamedBufferData, \c glClearBufferSubData
+ * and \c glClearNamedBufferSubData.
  *
  * \param ctx             GL context.
  * \param internalformat  Format to which the data is to be converted.
@@ -355,7 +372,8 @@ buffer_object_subdata_range_good(struct gl_context *ctx,
  * \return   If internalformat, format and type are legal the mesa_format
  *           corresponding to internalformat, otherwise MESA_FORMAT_NONE.
  *
- * \sa glClearBufferData and glClearBufferSubData
+ * \sa glClearBufferData, glClearNamedBufferData, glClearBufferSubData and
+ *     glClearNamedBufferSubData.
  */
 static mesa_format
 validate_clear_buffer_format(struct gl_context *ctx,
@@ -385,14 +403,14 @@ validate_clear_buffer_format(struct gl_context *ctx,
    }
 
    if (!_mesa_is_color_format(format)) {
-      _mesa_error(ctx, GL_INVALID_ENUM,
+      _mesa_error(ctx, GL_INVALID_VALUE,
                   "%s(format is not a color format)", caller);
       return MESA_FORMAT_NONE;
    }
 
    errorFormatType = _mesa_error_check_format_and_type(ctx, format, type);
    if (errorFormatType != GL_NO_ERROR) {
-      _mesa_error(ctx, GL_INVALID_ENUM,
+      _mesa_error(ctx, GL_INVALID_VALUE,
                   "%s(invalid format or type)", caller);
       return MESA_FORMAT_NONE;
    }
@@ -443,11 +461,10 @@ convert_clear_buffer_data(struct gl_context *ctx,
 static struct gl_buffer_object *
 _mesa_new_buffer_object(struct gl_context *ctx, GLuint name)
 {
-   struct gl_buffer_object *obj;
-
-   (void) ctx;
+   struct gl_buffer_object *obj = MALLOC_STRUCT(gl_buffer_object);
+   if (!obj)
+      return NULL;
 
-   obj = MALLOC_STRUCT(gl_buffer_object);
    _mesa_initialize_buffer_object(ctx, obj, name);
    return obj;
 }
@@ -465,13 +482,13 @@ _mesa_delete_buffer_object(struct gl_context *ctx,
    (void) ctx;
 
    vbo_delete_minmax_cache(bufObj);
-   _mesa_align_free(bufObj->Data);
+   align_free(bufObj->Data);
 
    /* assign strange values here to help w/ debugging */
    bufObj->RefCount = -1000;
    bufObj->Name = ~0;
 
-   mtx_destroy(&bufObj->Mutex);
+   simple_mtx_destroy(&bufObj->MinMaxCacheMutex);
    free(bufObj->Label);
    free(bufObj);
 }
@@ -490,16 +507,9 @@ _mesa_reference_buffer_object_(struct gl_context *ctx,
 {
    if (*ptr) {
       /* Unreference the old buffer */
-      GLboolean deleteFlag = GL_FALSE;
       struct gl_buffer_object *oldObj = *ptr;
 
-      mtx_lock(&oldObj->Mutex);
-      assert(oldObj->RefCount > 0);
-      oldObj->RefCount--;
-      deleteFlag = (oldObj->RefCount == 0);
-      mtx_unlock(&oldObj->Mutex);
-
-      if (deleteFlag) {
+      if (p_atomic_dec_zero(&oldObj->RefCount)) {
         assert(ctx->Driver.DeleteBuffer);
          ctx->Driver.DeleteBuffer(ctx, oldObj);
       }
@@ -510,12 +520,8 @@ _mesa_reference_buffer_object_(struct gl_context *ctx,
 
    if (bufObj) {
       /* reference new buffer */
-      mtx_lock(&bufObj->Mutex);
-      assert(bufObj->RefCount > 0);
-
-      bufObj->RefCount++;
+      p_atomic_inc(&bufObj->RefCount);
       *ptr = bufObj;
-      mtx_unlock(&bufObj->Mutex);
    }
 }
 
@@ -547,11 +553,11 @@ _mesa_initialize_buffer_object(struct gl_context *ctx,
                                GLuint name)
 {
    memset(obj, 0, sizeof(struct gl_buffer_object));
-   mtx_init(&obj->Mutex, mtx_plain);
    obj->RefCount = 1;
    obj->Name = name;
    obj->Usage = GL_STATIC_DRAW_ARB;
 
+   simple_mtx_init(&obj->MinMaxCacheMutex, mtx_plain);
    if (get_no_minmax_cache())
       obj->UsageHistory |= USAGE_DISABLE_MINMAX_CACHE;
 }
@@ -608,7 +614,7 @@ _mesa_total_buffer_object_memory(struct gl_context *ctx)
  * \sa glBufferDataARB, dd_function_table::BufferData.
  */
 static GLboolean
-buffer_data_fallback(struct gl_context *ctx, GLenum target, GLsizeiptr size,
+buffer_data_fallback(struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
                      const GLvoid *data, GLenum usage, GLenum storageFlags,
                      struct gl_buffer_object *bufObj)
 {
@@ -616,9 +622,9 @@ buffer_data_fallback(struct gl_context *ctx, GLenum target, GLsizeiptr size,
 
    (void) target;
 
-   _mesa_align_free( bufObj->Data );
+   align_free( bufObj->Data );
 
-   new_data = _mesa_align_malloc( size, ctx->Const.MinMapBufferAlignment );
+   new_data = align_malloc( size, ctx->Const.MinMapBufferAlignment );
    if (new_data) {
       bufObj->Data = (GLubyte *) new_data;
       bufObj->Size = size;
@@ -654,8 +660,8 @@ buffer_data_fallback(struct gl_context *ctx, GLenum target, GLsizeiptr size,
  * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
  */
 static void
-buffer_sub_data_fallback(struct gl_context *ctx, GLintptr offset,
-                         GLsizeiptr size, const GLvoid *data,
+buffer_sub_data_fallback(struct gl_context *ctx, GLintptrARB offset,
+                         GLsizeiptrARB size, const GLvoid *data,
                          struct gl_buffer_object *bufObj)
 {
    (void) ctx;
@@ -870,42 +876,13 @@ _mesa_init_buffer_objects( struct gl_context *ctx )
    GLuint i;
 
    memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
-   mtx_init(&DummyBufferObject.Mutex, mtx_plain);
+   simple_mtx_init(&DummyBufferObject.MinMaxCacheMutex, mtx_plain);
    DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
 
-   _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj,
-                                 ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer,
-                                 ctx->Shared->NullBufferObj);
-   _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer,
-                                 ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer,
-                                ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer,
-                                 ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->AtomicBuffer,
-                                ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->DrawIndirectBuffer,
-                                ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->ParameterBuffer,
-                                ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->DispatchIndirectBuffer,
-                                ctx->Shared->NullBufferObj);
-
-   _mesa_reference_buffer_object(ctx, &ctx->QueryBuffer,
-                                 ctx->Shared->NullBufferObj);
-
    for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
                                    &ctx->UniformBufferBindings[i].BufferObject,
-                                   ctx->Shared->NullBufferObj);
+                                   NULL);
       ctx->UniformBufferBindings[i].Offset = -1;
       ctx->UniformBufferBindings[i].Size = -1;
    }
@@ -913,7 +890,7 @@ _mesa_init_buffer_objects( struct gl_context *ctx )
    for (i = 0; i < MAX_COMBINED_SHADER_STORAGE_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
                                     &ctx->ShaderStorageBufferBindings[i].BufferObject,
-                                    ctx->Shared->NullBufferObj);
+                                    NULL);
       ctx->ShaderStorageBufferBindings[i].Offset = -1;
       ctx->ShaderStorageBufferBindings[i].Size = -1;
    }
@@ -921,7 +898,7 @@ _mesa_init_buffer_objects( struct gl_context *ctx )
    for (i = 0; i < MAX_COMBINED_ATOMIC_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
                                    &ctx->AtomicBufferBindings[i].BufferObject,
-                                   ctx->Shared->NullBufferObj);
+                                   NULL);
       ctx->AtomicBufferBindings[i].Offset = 0;
       ctx->AtomicBufferBindings[i].Size = 0;
    }
@@ -989,7 +966,6 @@ _mesa_handle_bind_buffer_gen(struct gl_context *ctx,
       /* If this is a new buffer object id, or one which was generated but
        * never used before, allocate a buffer object now.
        */
-      assert(ctx->Driver.NewBufferObject);
       buf = ctx->Driver.NewBufferObject(ctx, buffer);
       if (!buf) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", caller);
@@ -1017,29 +993,23 @@ bind_buffer_object(struct gl_context *ctx,
 
    /* Get pointer to old buffer object (to be unbound) */
    oldBufObj = *bindTarget;
-   if (oldBufObj && oldBufObj->Name == buffer && !oldBufObj->DeletePending)
+   if ((oldBufObj && oldBufObj->Name == buffer && !oldBufObj->DeletePending) ||
+       (!oldBufObj && buffer == 0))
       return;   /* rebinding the same buffer object- no change */
 
    /*
     * Get pointer to new buffer object (newBufObj)
     */
-   if (buffer == 0) {
-      /* The spec says there's not a buffer object named 0, but we use
-       * one internally because it simplifies things.
-       */
-      newBufObj = ctx->Shared->NullBufferObj;
-   }
-   else {
+   if (buffer != 0) {
       /* non-default buffer object */
       newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
       if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
                                         &newBufObj, "glBindBuffer"))
          return;
-   }
 
-   /* record usage history */
-   if (bindTarget == &ctx->Pack.BufferObj) {
-      newBufObj->UsageHistory |= USAGE_PIXEL_PACK_BUFFER;
+      /* record usage history */
+      if (bindTarget == &ctx->Pack.BufferObj)
+         newBufObj->UsageHistory |= USAGE_PIXEL_PACK_BUFFER;
    }
 
    /* bind new buffer */
@@ -1055,9 +1025,7 @@ bind_buffer_object(struct gl_context *ctx,
 void
 _mesa_update_default_objects_buffer_objects(struct gl_context *ctx)
 {
-   /* Bind the NullBufferObj to remove references to those
-    * in the shared context hash table.
-    */
+   /* Bind 0 to remove references to those in the shared context hash table. */
    bind_buffer_object(ctx, &ctx->Array.ArrayBufferObj, 0);
    bind_buffer_object(ctx, &ctx->Array.VAO->IndexBufferObj, 0);
    bind_buffer_object(ctx, &ctx->Pack.BufferObj, 0);
@@ -1121,10 +1089,9 @@ _mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
  * of an existing buffer object.
  *
  * If the buffer ID refers to an existing buffer object, a pointer
- * to the buffer object is returned.  If the ID is zero, a pointer
- * to the shared NullBufferObj is returned.  If the ID is not zero
- * and does not refer to a valid buffer object, this function
- * returns NULL.
+ * to the buffer object is returned.  If the ID is zero, NULL is returned.
+ * If the ID is not zero and does not refer to a valid buffer object, this
+ * function returns NULL.
  *
  * This function assumes that the caller has already locked the
  * hash table mutex by calling
@@ -1133,9 +1100,12 @@ _mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
 struct gl_buffer_object *
 _mesa_multi_bind_lookup_bufferobj(struct gl_context *ctx,
                                   const GLuint *buffers,
-                                  GLuint index, const char *caller)
+                                  GLuint index, const char *caller,
+                                  bool *error)
 {
-   struct gl_buffer_object *bufObj;
+   struct gl_buffer_object *bufObj = NULL;
+
+   *error = false;
 
    if (buffers[index] != 0) {
       bufObj = _mesa_lookup_bufferobj_locked(ctx, buffers[index]);
@@ -1144,20 +1114,20 @@ _mesa_multi_bind_lookup_bufferobj(struct gl_context *ctx,
          when they don't exist. */
       if (bufObj == &DummyBufferObject)
          bufObj = NULL;
-   } else
-      bufObj = ctx->Shared->NullBufferObj;
 
-   if (!bufObj) {
-      /* The ARB_multi_bind spec says:
-       *
-       *    "An INVALID_OPERATION error is generated if any value
-       *     in <buffers> is not zero or the name of an existing
-       *     buffer object (per binding)."
-       */
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "%s(buffers[%u]=%u is not zero or the name "
-                  "of an existing buffer object)",
-                  caller, index, buffers[index]);
+      if (!bufObj) {
+         /* The ARB_multi_bind spec says:
+          *
+          *    "An INVALID_OPERATION error is generated if any value
+          *     in <buffers> is not zero or the name of an existing
+          *     buffer object (per binding)."
+          */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "%s(buffers[%u]=%u is not zero or the name "
+                     "of an existing buffer object)",
+                     caller, index, buffers[index]);
+         *error = true;
+      }
    }
 
    return bufObj;
@@ -1176,9 +1146,9 @@ unbind(struct gl_context *ctx,
        struct gl_buffer_object *obj)
 {
    if (vao->BufferBinding[index].BufferObj == obj) {
-      _mesa_bind_vertex_buffer(ctx, vao, index, ctx->Shared->NullBufferObj,
+      _mesa_bind_vertex_buffer(ctx, vao, index, NULL,
                                vao->BufferBinding[index].Offset,
-                               vao->BufferBinding[index].Stride);
+                               vao->BufferBinding[index].Stride, true, false);
    }
 }
 
@@ -1228,6 +1198,16 @@ _mesa_buffer_unmap_all_mappings(struct gl_context *ctx,
 /* API Functions                                                      */
 /**********************************************************************/
 
+void GLAPIENTRY
+_mesa_BindBuffer_no_error(GLenum target, GLuint buffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object **bindTarget = get_buffer_target(ctx, target);
+   bind_buffer_object(ctx, bindTarget, buffer);
+}
+
+
 void GLAPIENTRY
 _mesa_BindBuffer(GLenum target, GLuint buffer)
 {
@@ -1248,28 +1228,238 @@ _mesa_BindBuffer(GLenum target, GLuint buffer)
    bind_buffer_object(ctx, bindTarget, buffer);
 }
 
+void
+_mesa_InternalBindElementBuffer(struct gl_context *ctx,
+                                struct gl_buffer_object *buf)
+{
+   struct gl_buffer_object **bindTarget =
+      get_buffer_target(ctx, GL_ELEMENT_ARRAY_BUFFER);
+
+   /* Move the buffer reference from the parameter to the bind point. */
+   _mesa_reference_buffer_object(ctx, bindTarget, NULL);
+   if (buf)
+      *bindTarget = buf;
+}
 
 /**
- * Delete a set of buffer objects.
+ * Binds a buffer object to a binding point.
  *
- * \param n      Number of buffer objects to delete.
- * \param ids    Array of \c n buffer object IDs.
+ * The caller is responsible for validating the offset,
+ * flushing the vertices and updating NewDriverState.
  */
-void GLAPIENTRY
-_mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
+static void
+set_buffer_binding(struct gl_context *ctx,
+                   struct gl_buffer_binding *binding,
+                   struct gl_buffer_object *bufObj,
+                   GLintptr offset,
+                   GLsizeiptr size,
+                   bool autoSize, gl_buffer_usage usage)
 {
-   GET_CURRENT_CONTEXT(ctx);
-   GLsizei i;
+   _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
+
+   binding->Offset = offset;
+   binding->Size = size;
+   binding->AutomaticSize = autoSize;
+
+   /* If this is a real buffer object, mark it has having been used
+    * at some point as an atomic counter buffer.
+    */
+   if (size >= 0)
+      bufObj->UsageHistory |= usage;
+}
+
+static void
+set_buffer_multi_binding(struct gl_context *ctx,
+                         const GLuint *buffers,
+                         int idx,
+                         const char *caller,
+                         struct gl_buffer_binding *binding,
+                         GLintptr offset,
+                         GLsizeiptr size,
+                         bool range,
+                         gl_buffer_usage usage)
+{
+   struct gl_buffer_object *bufObj;
+
+   if (binding->BufferObject && binding->BufferObject->Name == buffers[idx])
+      bufObj = binding->BufferObject;
+   else {
+      bool error;
+      bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, idx, caller,
+                                                 &error);
+      if (error)
+         return;
+   }
+
+   if (!bufObj)
+      set_buffer_binding(ctx, binding, bufObj, -1, -1, !range, usage);
+   else
+      set_buffer_binding(ctx, binding, bufObj, offset, size, !range, usage);
+}
+
+static void
+bind_buffer(struct gl_context *ctx,
+            struct gl_buffer_binding *binding,
+            struct gl_buffer_object *bufObj,
+            GLintptr offset,
+            GLsizeiptr size,
+            GLboolean autoSize,
+            uint64_t driver_state,
+            gl_buffer_usage usage)
+{
+   if (binding->BufferObject == bufObj &&
+       binding->Offset == offset &&
+       binding->Size == size &&
+       binding->AutomaticSize == autoSize) {
+      return;
+   }
+
    FLUSH_VERTICES(ctx, 0);
+   ctx->NewDriverState |= driver_state;
 
-   if (n < 0) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)");
+   set_buffer_binding(ctx, binding, bufObj, offset, size, autoSize, usage);
+}
+
+/**
+ * Binds a buffer object to a uniform buffer binding point.
+ *
+ * Unlike set_buffer_binding(), this function also flushes vertices
+ * and updates NewDriverState.  It also checks if the binding
+ * has actually changed before updating it.
+ */
+static void
+bind_uniform_buffer(struct gl_context *ctx,
+                    GLuint index,
+                    struct gl_buffer_object *bufObj,
+                    GLintptr offset,
+                    GLsizeiptr size,
+                    GLboolean autoSize)
+{
+   bind_buffer(ctx, &ctx->UniformBufferBindings[index],
+               bufObj, offset, size, autoSize,
+               ctx->DriverFlags.NewUniformBuffer,
+               USAGE_UNIFORM_BUFFER);
+}
+
+/**
+ * Binds a buffer object to a shader storage buffer binding point.
+ *
+ * Unlike set_ssbo_binding(), this function also flushes vertices
+ * and updates NewDriverState.  It also checks if the binding
+ * has actually changed before updating it.
+ */
+static void
+bind_shader_storage_buffer(struct gl_context *ctx,
+                           GLuint index,
+                           struct gl_buffer_object *bufObj,
+                           GLintptr offset,
+                           GLsizeiptr size,
+                           GLboolean autoSize)
+{
+   bind_buffer(ctx, &ctx->ShaderStorageBufferBindings[index],
+               bufObj, offset, size, autoSize,
+               ctx->DriverFlags.NewShaderStorageBuffer,
+               USAGE_SHADER_STORAGE_BUFFER);
+}
+
+/**
+ * Binds a buffer object to an atomic buffer binding point.
+ *
+ * Unlike set_atomic_binding(), this function also flushes vertices
+ * and updates NewDriverState.  It also checks if the binding
+ * has actually changed before updating it.
+ */
+static void
+bind_atomic_buffer(struct gl_context *ctx, unsigned index,
+                   struct gl_buffer_object *bufObj, GLintptr offset,
+                   GLsizeiptr size, GLboolean autoSize)
+{
+   bind_buffer(ctx, &ctx->AtomicBufferBindings[index],
+               bufObj, offset, size, autoSize,
+               ctx->DriverFlags.NewAtomicBuffer,
+               USAGE_ATOMIC_COUNTER_BUFFER);
+}
+
+/**
+ * Bind a buffer object to a uniform block binding point.
+ * As above, but offset = 0.
+ */
+static void
+bind_buffer_base_uniform_buffer(struct gl_context *ctx,
+                               GLuint index,
+                               struct gl_buffer_object *bufObj)
+{
+   if (index >= ctx->Const.MaxUniformBufferBindings) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
+      return;
+   }
+
+   _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
+
+   if (!bufObj)
+      bind_uniform_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
+   else
+      bind_uniform_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
+}
+
+/**
+ * Bind a buffer object to a shader storage block binding point.
+ * As above, but offset = 0.
+ */
+static void
+bind_buffer_base_shader_storage_buffer(struct gl_context *ctx,
+                                       GLuint index,
+                                       struct gl_buffer_object *bufObj)
+{
+   if (index >= ctx->Const.MaxShaderStorageBufferBindings) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
+      return;
+   }
+
+   _mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer, bufObj);
+
+   if (!bufObj)
+      bind_shader_storage_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
+   else
+      bind_shader_storage_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
+}
+
+/**
+ * Bind a buffer object to a shader storage block binding point.
+ * As above, but offset = 0.
+ */
+static void
+bind_buffer_base_atomic_buffer(struct gl_context *ctx,
+                               GLuint index,
+                               struct gl_buffer_object *bufObj)
+{
+   if (index >= ctx->Const.MaxAtomicBufferBindings) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
       return;
    }
 
+   _mesa_reference_buffer_object(ctx, &ctx->AtomicBuffer, bufObj);
+
+   if (!bufObj)
+      bind_atomic_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
+   else
+      bind_atomic_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
+}
+
+/**
+ * Delete a set of buffer objects.
+ *
+ * \param n      Number of buffer objects to delete.
+ * \param ids    Array of \c n buffer object IDs.
+ */
+static void
+delete_buffers(struct gl_context *ctx, GLsizei n, const GLuint *ids)
+{
+   FLUSH_VERTICES(ctx, 0);
+
    _mesa_HashLockMutex(ctx->Shared->BufferObjects);
 
-   for (i = 0; i < n; i++) {
+   for (GLsizei i = 0; i < n; i++) {
       struct gl_buffer_object *bufObj =
          _mesa_lookup_bufferobj_locked(ctx, ids[i]);
       if (bufObj) {
@@ -1321,14 +1511,16 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
          }
          for (j = 0; j < MAX_FEEDBACK_BUFFERS; j++) {
             if (ctx->TransformFeedback.CurrentObject->Buffers[j] == bufObj) {
-               _mesa_BindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, j, 0 );
+               _mesa_bind_buffer_base_transform_feedback(ctx,
+                                           ctx->TransformFeedback.CurrentObject,
+                                           j, NULL, false);
             }
          }
 
          /* unbind UBO binding points */
          for (j = 0; j < ctx->Const.MaxUniformBufferBindings; j++) {
             if (ctx->UniformBufferBindings[j].BufferObject == bufObj) {
-               _mesa_BindBufferBase( GL_UNIFORM_BUFFER, j, 0 );
+               bind_buffer_base_uniform_buffer(ctx, j, NULL);
             }
          }
 
@@ -1339,7 +1531,7 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
          /* unbind SSBO binding points */
          for (j = 0; j < ctx->Const.MaxShaderStorageBufferBindings; j++) {
             if (ctx->ShaderStorageBufferBindings[j].BufferObject == bufObj) {
-               _mesa_BindBufferBase(GL_SHADER_STORAGE_BUFFER, j, 0);
+               bind_buffer_base_shader_storage_buffer(ctx, j, NULL);
             }
          }
 
@@ -1350,7 +1542,7 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
          /* unbind Atomci Buffer binding points */
          for (j = 0; j < ctx->Const.MaxAtomicBufferBindings; j++) {
             if (ctx->AtomicBufferBindings[j].BufferObject == bufObj) {
-               _mesa_BindBufferBase( GL_ATOMIC_COUNTER_BUFFER, j, 0 );
+               bind_buffer_base_atomic_buffer(ctx, j, NULL);
             }
          }
 
@@ -1400,31 +1592,41 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
 }
 
 
+void GLAPIENTRY
+_mesa_DeleteBuffers_no_error(GLsizei n, const GLuint *ids)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   delete_buffers(ctx, n, ids);
+}
+
+
+void GLAPIENTRY
+_mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)");
+      return;
+   }
+
+   delete_buffers(ctx, n, ids);
+}
+
+
 /**
  * This is the implementation for glGenBuffers and glCreateBuffers. It is not
  * exposed to the rest of Mesa to encourage the use of nameless buffers in
  * driver internals.
  */
 static void
-create_buffers(GLsizei n, GLuint *buffers, bool dsa)
+create_buffers(struct gl_context *ctx, GLsizei n, GLuint *buffers, bool dsa)
 {
-   GET_CURRENT_CONTEXT(ctx);
    GLuint first;
    struct gl_buffer_object *buf;
 
-   const char *func = dsa ? "glCreateBuffers" : "glGenBuffers";
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "%s(%d)\n", func, n);
-
-   if (n < 0) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(n %d < 0)", func, n);
-      return;
-   }
-
-   if (!buffers) {
+   if (!buffers)
       return;
-   }
 
    /*
     * This must be atomic (generation and allocation of buffer object IDs)
@@ -1443,7 +1645,7 @@ create_buffers(GLsizei n, GLuint *buffers, bool dsa)
          assert(ctx->Driver.NewBufferObject);
          buf = ctx->Driver.NewBufferObject(ctx, buffers[i]);
          if (!buf) {
-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", func);
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCreateBuffers");
             _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
             return;
          }
@@ -1457,16 +1659,42 @@ create_buffers(GLsizei n, GLuint *buffers, bool dsa)
    _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
 }
 
-/**
- * Generate a set of unique buffer object IDs and store them in \c buffers.
- *
- * \param n        Number of IDs to generate.
- * \param buffers  Array of \c n locations to store the IDs.
- */
-void GLAPIENTRY
+
+static void
+create_buffers_err(struct gl_context *ctx, GLsizei n, GLuint *buffers, bool dsa)
+{
+   const char *func = dsa ? "glCreateBuffers" : "glGenBuffers";
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "%s(%d)\n", func, n);
+
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "%s(n %d < 0)", func, n);
+      return;
+   }
+
+   create_buffers(ctx, n, buffers, dsa);
+}
+
+/**
+ * Generate a set of unique buffer object IDs and store them in \c buffers.
+ *
+ * \param n        Number of IDs to generate.
+ * \param buffers  Array of \c n locations to store the IDs.
+ */
+void GLAPIENTRY
+_mesa_GenBuffers_no_error(GLsizei n, GLuint *buffers)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   create_buffers(ctx, n, buffers, false);
+}
+
+
+void GLAPIENTRY
 _mesa_GenBuffers(GLsizei n, GLuint *buffers)
 {
-   create_buffers(n, buffers, false);
+   GET_CURRENT_CONTEXT(ctx);
+   create_buffers_err(ctx, n, buffers, false);
 }
 
 /**
@@ -1475,10 +1703,19 @@ _mesa_GenBuffers(GLsizei n, GLuint *buffers)
  * \param n        Number of IDs to generate.
  * \param buffers  Array of \c n locations to store the IDs.
  */
+void GLAPIENTRY
+_mesa_CreateBuffers_no_error(GLsizei n, GLuint *buffers)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   create_buffers(ctx, n, buffers, true);
+}
+
+
 void GLAPIENTRY
 _mesa_CreateBuffers(GLsizei n, GLuint *buffers)
 {
-   create_buffers(n, buffers, true);
+   GET_CURRENT_CONTEXT(ctx);
+   create_buffers_err(ctx, n, buffers, true);
 }
 
 
@@ -1552,7 +1789,7 @@ validate_buffer_storage(struct gl_context *ctx,
       return false;
    }
 
-   if (bufObj->Immutable) {
+   if (bufObj->Immutable || bufObj->HandleAllocated) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(immutable)", func);
       return false;
    }
@@ -1563,21 +1800,33 @@ validate_buffer_storage(struct gl_context *ctx,
 
 static void
 buffer_storage(struct gl_context *ctx, struct gl_buffer_object *bufObj,
-               GLenum target, GLsizeiptr size, const GLvoid *data,
-               GLbitfield flags, const char *func)
+               struct gl_memory_object *memObj, GLenum target,
+               GLsizeiptr size, const GLvoid *data, GLbitfield flags,
+               GLuint64 offset, const char *func)
 {
+   GLboolean res;
+
    /* Unmap the existing buffer.  We'll replace it now.  Not an error. */
    _mesa_buffer_unmap_all_mappings(ctx, bufObj);
 
-   FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
+   FLUSH_VERTICES(ctx, 0);
 
    bufObj->Written = GL_TRUE;
    bufObj->Immutable = GL_TRUE;
    bufObj->MinMaxCacheDirty = true;
 
-   assert(ctx->Driver.BufferData);
-   if (!ctx->Driver.BufferData(ctx, target, size, data, GL_DYNAMIC_DRAW,
-                               flags, bufObj)) {
+   if (memObj) {
+      assert(ctx->Driver.BufferDataMem);
+      res = ctx->Driver.BufferDataMem(ctx, target, size, memObj, offset,
+                                      GL_DYNAMIC_DRAW, bufObj);
+   }
+   else {
+      assert(ctx->Driver.BufferData);
+      res = ctx->Driver.BufferData(ctx, target, size, data, GL_DYNAMIC_DRAW,
+                                   flags, bufObj);
+   }
+
+   if (!res) {
       if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
          /* Even though the interaction between AMD_pinned_memory and
           * glBufferStorage is not described in the spec, Graham Sellers
@@ -1594,24 +1843,77 @@ buffer_storage(struct gl_context *ctx, struct gl_buffer_object *bufObj,
 
 static ALWAYS_INLINE void
 inlined_buffer_storage(GLenum target, GLuint buffer, GLsizeiptr size,
-                       const GLvoid *data, GLbitfield flags, bool dsa,
-                       const char *func)
+                       const GLvoid *data, GLbitfield flags,
+                       GLuint memory, GLuint64 offset,
+                       bool dsa, bool mem, bool no_error, const char *func)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;
+   struct gl_memory_object *memObj = NULL;
 
-   if (dsa) {
-      bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, func);
-      if (!bufObj)
+   if (mem) {
+      if (!no_error) {
+         if (!ctx->Extensions.EXT_memory_object) {
+            _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unsupported)", func);
+            return;
+         }
+
+         /* From the EXT_external_objects spec:
+          *
+          *   "An INVALID_VALUE error is generated by BufferStorageMemEXT and
+          *   NamedBufferStorageMemEXT if <memory> is 0, or ..."
+          */
+         if (memory == 0) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "%s(memory == 0)", func);
+         }
+      }
+
+      memObj = _mesa_lookup_memory_object(ctx, memory);
+      if (!memObj)
          return;
-   } else {
-      bufObj = get_buffer(ctx, func, target, GL_INVALID_OPERATION);
-      if (!bufObj)
+
+      /* From the EXT_external_objects spec:
+       *
+       *   "An INVALID_OPERATION error is generated if <memory> names a
+       *   valid memory object which has no associated memory."
+       */
+      if (!no_error && !memObj->Immutable) {
+         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(no associated memory)",
+                     func);
          return;
+      }
    }
 
-   if (validate_buffer_storage(ctx, bufObj, size, flags, func))
-      buffer_storage(ctx, bufObj, target, size, data, flags, func);
+   if (dsa) {
+      if (no_error) {
+         bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+      } else {
+         bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, func);
+         if (!bufObj)
+            return;
+      }
+   } else {
+      if (no_error) {
+         struct gl_buffer_object **bufObjPtr = get_buffer_target(ctx, target);
+         bufObj = *bufObjPtr;
+      } else {
+         bufObj = get_buffer(ctx, func, target, GL_INVALID_OPERATION);
+         if (!bufObj)
+            return;
+      }
+   }
+
+   if (no_error || validate_buffer_storage(ctx, bufObj, size, flags, func))
+      buffer_storage(ctx, bufObj, memObj, target, size, data, flags, offset, func);
+}
+
+
+void GLAPIENTRY
+_mesa_BufferStorage_no_error(GLenum target, GLsizeiptr size,
+                             const GLvoid *data, GLbitfield flags)
+{
+   inlined_buffer_storage(target, 0, size, data, flags, GL_NONE, 0,
+                          false, false, true, "glBufferStorage");
 }
 
 
@@ -1619,10 +1921,56 @@ void GLAPIENTRY
 _mesa_BufferStorage(GLenum target, GLsizeiptr size, const GLvoid *data,
                     GLbitfield flags)
 {
-   inlined_buffer_storage(target, 0, size, data, flags, false,
-                          "glBufferStorage");
+   inlined_buffer_storage(target, 0, size, data, flags, GL_NONE, 0,
+                          false, false, false, "glBufferStorage");
 }
 
+void GLAPIENTRY
+_mesa_NamedBufferStorageEXT(GLuint buffer, GLsizeiptr size,
+                            const GLvoid *data, GLbitfield flags)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glNamedBufferStorageEXT"))
+      return;
+
+   inlined_buffer_storage(GL_NONE, buffer, size, data, flags, GL_NONE, 0,
+                          true, false, false, "glNamedBufferStorageEXT");
+}
+
+
+void GLAPIENTRY
+_mesa_BufferStorageMemEXT(GLenum target, GLsizeiptr size,
+                          GLuint memory, GLuint64 offset)
+{
+   inlined_buffer_storage(target, 0, size, NULL, 0, memory, offset,
+                          false, true, false, "glBufferStorageMemEXT");
+}
+
+
+void GLAPIENTRY
+_mesa_BufferStorageMemEXT_no_error(GLenum target, GLsizeiptr size,
+                                   GLuint memory, GLuint64 offset)
+{
+   inlined_buffer_storage(target, 0, size, NULL, 0, memory, offset,
+                          false, true, true, "glBufferStorageMemEXT");
+}
+
+
+void GLAPIENTRY
+_mesa_NamedBufferStorage_no_error(GLuint buffer, GLsizeiptr size,
+                                  const GLvoid *data, GLbitfield flags)
+{
+   /* In direct state access, buffer objects have an unspecified target
+    * since they are not required to be bound.
+    */
+   inlined_buffer_storage(GL_NONE, buffer, size, data, flags, GL_NONE, 0,
+                          true, false, true, "glNamedBufferStorage");
+}
+
+
 void GLAPIENTRY
 _mesa_NamedBufferStorage(GLuint buffer, GLsizeiptr size, const GLvoid *data,
                          GLbitfield flags)
@@ -1630,15 +1978,32 @@ _mesa_NamedBufferStorage(GLuint buffer, GLsizeiptr size, const GLvoid *data,
    /* In direct state access, buffer objects have an unspecified target
     * since they are not required to be bound.
     */
-   inlined_buffer_storage(GL_NONE, buffer, size, data, flags, true,
-                          "glNamedBufferStorage");
+   inlined_buffer_storage(GL_NONE, buffer, size, data, flags, GL_NONE, 0,
+                          true, false, false, "glNamedBufferStorage");
 }
 
+void GLAPIENTRY
+_mesa_NamedBufferStorageMemEXT(GLuint buffer, GLsizeiptr size,
+                               GLuint memory, GLuint64 offset)
+{
+   inlined_buffer_storage(GL_NONE, buffer, size, GL_NONE, 0, memory, offset,
+                          true, true, false, "glNamedBufferStorageMemEXT");
+}
 
-void
-_mesa_buffer_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
-                  GLenum target, GLsizeiptr size, const GLvoid *data,
-                  GLenum usage, const char *func)
+
+void GLAPIENTRY
+_mesa_NamedBufferStorageMemEXT_no_error(GLuint buffer, GLsizeiptr size,
+                                        GLuint memory, GLuint64 offset)
+{
+   inlined_buffer_storage(GL_NONE, buffer, size, GL_NONE, 0, memory, offset,
+                          true, true, true, "glNamedBufferStorageMemEXT");
+}
+
+
+static ALWAYS_INLINE void
+buffer_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
+            GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage,
+            const char *func, bool no_error)
 {
    bool valid_usage;
 
@@ -1650,50 +2015,49 @@ _mesa_buffer_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
                   _mesa_enum_to_string(usage));
    }
 
-   if (size < 0) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", func);
-      return;
-   }
-
-   switch (usage) {
-   case GL_STREAM_DRAW_ARB:
-      valid_usage = (ctx->API != API_OPENGLES);
-      break;
-
-   case GL_STATIC_DRAW_ARB:
-   case GL_DYNAMIC_DRAW_ARB:
-      valid_usage = true;
-      break;
-
-   case GL_STREAM_READ_ARB:
-   case GL_STREAM_COPY_ARB:
-   case GL_STATIC_READ_ARB:
-   case GL_STATIC_COPY_ARB:
-   case GL_DYNAMIC_READ_ARB:
-   case GL_DYNAMIC_COPY_ARB:
-      valid_usage = _mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx);
-      break;
+   if (!no_error) {
+      if (size < 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", func);
+         return;
+      }
 
-   default:
-      valid_usage = false;
-      break;
-   }
+      switch (usage) {
+      case GL_STREAM_DRAW_ARB:
+         valid_usage = (ctx->API != API_OPENGLES);
+         break;
+      case GL_STATIC_DRAW_ARB:
+      case GL_DYNAMIC_DRAW_ARB:
+         valid_usage = true;
+         break;
+      case GL_STREAM_READ_ARB:
+      case GL_STREAM_COPY_ARB:
+      case GL_STATIC_READ_ARB:
+      case GL_STATIC_COPY_ARB:
+      case GL_DYNAMIC_READ_ARB:
+      case GL_DYNAMIC_COPY_ARB:
+         valid_usage = _mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx);
+         break;
+      default:
+         valid_usage = false;
+         break;
+      }
 
-   if (!valid_usage) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "%s(invalid usage: %s)", func,
-                  _mesa_enum_to_string(usage));
-      return;
-   }
+      if (!valid_usage) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "%s(invalid usage: %s)", func,
+                     _mesa_enum_to_string(usage));
+         return;
+      }
 
-   if (bufObj->Immutable) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(immutable)", func);
-      return;
+      if (bufObj->Immutable || bufObj->HandleAllocated) {
+         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(immutable)", func);
+         return;
+      }
    }
 
    /* Unmap the existing buffer.  We'll replace it now.  Not an error. */
    _mesa_buffer_unmap_all_mappings(ctx, bufObj);
 
-   FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
+   FLUSH_VERTICES(ctx, 0);
 
    bufObj->Written = GL_TRUE;
    bufObj->MinMaxCacheDirty = true;
@@ -1714,20 +2078,56 @@ _mesa_buffer_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
                                GL_DYNAMIC_STORAGE_BIT,
                                bufObj)) {
       if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
-         /* From GL_AMD_pinned_memory:
-          *
-          *   INVALID_OPERATION is generated by BufferData if <target> is
-          *   EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, and the store cannot be
-          *   mapped to the GPU address space.
-          */
-         _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
-      }
-      else {
+         if (!no_error) {
+            /* From GL_AMD_pinned_memory:
+             *
+             *   INVALID_OPERATION is generated by BufferData if <target> is
+             *   EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, and the store cannot be
+             *   mapped to the GPU address space.
+             */
+            _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
+         }
+      } else {
          _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", func);
       }
    }
 }
 
+static void
+buffer_data_error(struct gl_context *ctx, struct gl_buffer_object *bufObj,
+                  GLenum target, GLsizeiptr size, const GLvoid *data,
+                  GLenum usage, const char *func)
+{
+   buffer_data(ctx, bufObj, target, size, data, usage, func, false);
+}
+
+static void
+buffer_data_no_error(struct gl_context *ctx, struct gl_buffer_object *bufObj,
+                     GLenum target, GLsizeiptr size, const GLvoid *data,
+                     GLenum usage, const char *func)
+{
+   buffer_data(ctx, bufObj, target, size, data, usage, func, true);
+}
+
+void
+_mesa_buffer_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
+                  GLenum target, GLsizeiptr size, const GLvoid *data,
+                  GLenum usage, const char *func)
+{
+   buffer_data_error(ctx, bufObj, target, size, data, usage, func);
+}
+
+void GLAPIENTRY
+_mesa_BufferData_no_error(GLenum target, GLsizeiptr size, const GLvoid *data,
+                          GLenum usage)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
+   buffer_data_no_error(ctx, *bufObj, target, size, data, usage,
+                        "glBufferData");
+}
+
 void GLAPIENTRY
 _mesa_BufferData(GLenum target, GLsizeiptr size,
                  const GLvoid *data, GLenum usage)
@@ -1743,6 +2143,17 @@ _mesa_BufferData(GLenum target, GLsizeiptr size,
                      "glBufferData");
 }
 
+void GLAPIENTRY
+_mesa_NamedBufferData_no_error(GLuint buffer, GLsizeiptr size,
+                               const GLvoid *data, GLenum usage)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   buffer_data_no_error(ctx, bufObj, GL_NONE, size, data, usage,
+                        "glNamedBufferData");
+}
+
 void GLAPIENTRY
 _mesa_NamedBufferData(GLuint buffer, GLsizeiptr size, const GLvoid *data,
                       GLenum usage)
@@ -1761,43 +2172,49 @@ _mesa_NamedBufferData(GLuint buffer, GLsizeiptr size, const GLvoid *data,
                      "glNamedBufferData");
 }
 
+void GLAPIENTRY
+_mesa_NamedBufferDataEXT(GLuint buffer, GLsizeiptr size, const GLvoid *data,
+                         GLenum usage)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj;
 
-/**
- * Implementation for glBufferSubData and glNamedBufferSubData.
- *
- * \param ctx     GL context.
- * \param bufObj  The buffer object.
- * \param offset  Offset of the first byte of the subdata range.
- * \param size    Size, in bytes, of the subdata range.
- * \param data    The data store.
- * \param func  Name of calling function for recording errors.
- *
- */
-void
-_mesa_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
-                      GLintptr offset, GLsizeiptr size, const GLvoid *data,
-                      const char *func)
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glNamedBufferDataEXT(buffer=0)");
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glNamedBufferDataEXT"))
+      return;
+
+   _mesa_buffer_data(ctx, bufObj, GL_NONE, size, data, usage,
+                     "glNamedBufferDataEXT");
+}
+
+static bool
+validate_buffer_sub_data(struct gl_context *ctx,
+                         struct gl_buffer_object *bufObj,
+                         GLintptr offset, GLsizeiptr size,
+                         const char *func)
 {
    if (!buffer_object_subdata_range_good(ctx, bufObj, offset, size,
                                          true, func)) {
       /* error already recorded */
-      return;
+      return false;
    }
 
    if (bufObj->Immutable &&
        !(bufObj->StorageFlags & GL_DYNAMIC_STORAGE_BIT)) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
-      return;
+      return false;
    }
 
-   if (size == 0)
-      return;
-
-   bufObj->NumSubDataCalls++;
-
    if ((bufObj->Usage == GL_STATIC_DRAW ||
         bufObj->Usage == GL_STATIC_COPY) &&
-       bufObj->NumSubDataCalls >= BUFFER_WARNING_CALL_COUNT) {
+       bufObj->NumSubDataCalls >= BUFFER_WARNING_CALL_COUNT - 1) {
       /* If the application declared the buffer as static draw/copy or stream
        * draw, it should not be frequently modified with glBufferSubData.
        */
@@ -1808,6 +2225,29 @@ _mesa_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
                            _mesa_enum_to_string(bufObj->Usage));
    }
 
+   return true;
+}
+
+
+/**
+ * Implementation for glBufferSubData and glNamedBufferSubData.
+ *
+ * \param ctx     GL context.
+ * \param bufObj  The buffer object.
+ * \param offset  Offset of the first byte of the subdata range.
+ * \param size    Size, in bytes, of the subdata range.
+ * \param data    The data store.
+ * \param func  Name of calling function for recording errors.
+ *
+ */
+void
+_mesa_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
+                      GLintptr offset, GLsizeiptr size, const GLvoid *data)
+{
+   if (size == 0)
+      return;
+
+   bufObj->NumSubDataCalls++;
    bufObj->Written = GL_TRUE;
    bufObj->MinMaxCacheDirty = true;
 
@@ -1815,33 +2255,94 @@ _mesa_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
    ctx->Driver.BufferSubData(ctx, offset, size, data, bufObj);
 }
 
-void GLAPIENTRY
-_mesa_BufferSubData(GLenum target, GLintptr offset,
-                    GLsizeiptr size, const GLvoid *data)
+
+static ALWAYS_INLINE void
+buffer_sub_data(GLenum target, GLuint buffer, GLintptr offset,
+                GLsizeiptr size, const GLvoid *data,
+                bool dsa, bool no_error, const char *func)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;
 
-   bufObj = get_buffer(ctx, "glBufferSubData", target, GL_INVALID_OPERATION);
-   if (!bufObj)
-      return;
+   if (dsa) {
+      if (no_error) {
+         bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+      } else {
+         bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, func);
+         if (!bufObj)
+            return;
+      }
+   } else {
+      if (no_error) {
+         struct gl_buffer_object **bufObjPtr = get_buffer_target(ctx, target);
+         bufObj = *bufObjPtr;
+      } else {
+         bufObj = get_buffer(ctx, func, target, GL_INVALID_OPERATION);
+         if (!bufObj)
+            return;
+      }
+   }
+
+   if (no_error || validate_buffer_sub_data(ctx, bufObj, offset, size, func))
+      _mesa_buffer_sub_data(ctx, bufObj, offset, size, data);
+}
 
-   _mesa_buffer_sub_data(ctx, bufObj, offset, size, data, "glBufferSubData");
+
+void GLAPIENTRY
+_mesa_BufferSubData_no_error(GLenum target, GLintptr offset,
+                             GLsizeiptr size, const GLvoid *data)
+{
+   buffer_sub_data(target, 0, offset, size, data, false, true,
+                   "glBufferSubData");
+}
+
+
+void GLAPIENTRY
+_mesa_BufferSubData(GLenum target, GLintptr offset,
+                    GLsizeiptr size, const GLvoid *data)
+{
+   buffer_sub_data(target, 0, offset, size, data, false, false,
+                   "glBufferSubData");
+}
+
+void GLAPIENTRY
+_mesa_NamedBufferSubData_no_error(GLuint buffer, GLintptr offset,
+                                  GLsizeiptr size, const GLvoid *data)
+{
+   buffer_sub_data(0, buffer, offset, size, data, true, true,
+                   "glNamedBufferSubData");
 }
 
 void GLAPIENTRY
 _mesa_NamedBufferSubData(GLuint buffer, GLintptr offset,
                          GLsizeiptr size, const GLvoid *data)
+{
+   buffer_sub_data(0, buffer, offset, size, data, true, false,
+                   "glNamedBufferSubData");
+}
+
+void GLAPIENTRY
+_mesa_NamedBufferSubDataEXT(GLuint buffer, GLintptr offset,
+                            GLsizeiptr size, const GLvoid *data)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;
 
-   bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, "glNamedBufferSubData");
-   if (!bufObj)
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glNamedBufferSubDataEXT(buffer=0)");
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glNamedBufferSubDataEXT"))
       return;
 
-   _mesa_buffer_sub_data(ctx, bufObj, offset, size, data,
-                         "glNamedBufferSubData");
+   if (validate_buffer_sub_data(ctx, bufObj, offset, size,
+                                "glNamedBufferSubDataEXT")) {
+      _mesa_buffer_sub_data(ctx, bufObj, offset, size, data);
+   }
 }
 
 
@@ -1888,34 +2389,65 @@ _mesa_GetNamedBufferSubData(GLuint buffer, GLintptr offset,
 }
 
 
+void GLAPIENTRY
+_mesa_GetNamedBufferSubDataEXT(GLuint buffer, GLintptr offset,
+                               GLsizeiptr size, GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj;
+
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetNamedBufferSubDataEXT(buffer=0)");
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glGetNamedBufferSubDataEXT"))
+      return;
+
+   if (!buffer_object_subdata_range_good(ctx, bufObj, offset, size, false,
+                                         "glGetNamedBufferSubDataEXT")) {
+      return;
+   }
+
+   assert(ctx->Driver.GetBufferSubData);
+   ctx->Driver.GetBufferSubData(ctx, offset, size, data, bufObj);
+}
+
 /**
  * \param subdata   true if caller is *SubData, false if *Data
  */
-static void
+static ALWAYS_INLINE void
 clear_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
                       GLenum internalformat, GLintptr offset, GLsizeiptr size,
                       GLenum format, GLenum type, const GLvoid *data,
-                      const char *func, bool subdata)
+                      const char *func, bool subdata, bool no_error)
 {
    mesa_format mesaFormat;
    GLubyte clearValue[MAX_PIXEL_BYTES];
    GLsizeiptr clearValueSize;
 
    /* This checks for disallowed mappings. */
-   if (!buffer_object_subdata_range_good(ctx, bufObj, offset, size,
-                                         subdata, func)) {
+   if (!no_error && !buffer_object_subdata_range_good(ctx, bufObj, offset, size,
+                                                      subdata, func)) {
       return;
    }
 
-   mesaFormat = validate_clear_buffer_format(ctx, internalformat,
-                                             format, type, func);
+   if (no_error) {
+      mesaFormat = _mesa_get_texbuffer_format(ctx, internalformat);
+   } else {
+      mesaFormat = validate_clear_buffer_format(ctx, internalformat,
+                                                format, type, func);
+   }
 
-   if (mesaFormat == MESA_FORMAT_NONE) {
+   if (mesaFormat == MESA_FORMAT_NONE)
       return;
-   }
 
    clearValueSize = _mesa_get_format_bytes(mesaFormat);
-   if (offset % clearValueSize != 0 || size % clearValueSize != 0) {
+   if (!no_error &&
+       (offset % clearValueSize != 0 || size % clearValueSize != 0)) {
       _mesa_error(ctx, GL_INVALID_VALUE,
                   "%s(offset or size is not a multiple of "
                   "internalformat size)", func);
@@ -1935,15 +2467,53 @@ clear_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *bufObj,
       return;
    }
 
-   if (!convert_clear_buffer_data(ctx, mesaFormat, clearValue,
-                                  format, type, data, func)) {
-      return;
-   }
+   if (!convert_clear_buffer_data(ctx, mesaFormat, clearValue,
+                                  format, type, data, func)) {
+      return;
+   }
+
+   ctx->Driver.ClearBufferSubData(ctx, offset, size,
+                                  clearValue, clearValueSize, bufObj);
+}
+
+static void
+clear_buffer_sub_data_error(struct gl_context *ctx,
+                            struct gl_buffer_object *bufObj,
+                            GLenum internalformat, GLintptr offset,
+                            GLsizeiptr size, GLenum format, GLenum type,
+                            const GLvoid *data, const char *func, bool subdata)
+{
+   clear_buffer_sub_data(ctx, bufObj, internalformat, offset, size, format,
+                         type, data, func, subdata, false);
+}
+
+
+static void
+clear_buffer_sub_data_no_error(struct gl_context *ctx,
+                               struct gl_buffer_object *bufObj,
+                               GLenum internalformat, GLintptr offset,
+                               GLsizeiptr size, GLenum format, GLenum type,
+                               const GLvoid *data, const char *func,
+                               bool subdata)
+{
+   clear_buffer_sub_data(ctx, bufObj, internalformat, offset, size, format,
+                         type, data, func, subdata, true);
+}
+
 
-   ctx->Driver.ClearBufferSubData(ctx, offset, size,
-                                  clearValue, clearValueSize, bufObj);
+void GLAPIENTRY
+_mesa_ClearBufferData_no_error(GLenum target, GLenum internalformat,
+                               GLenum format, GLenum type, const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
+   clear_buffer_sub_data_no_error(ctx, *bufObj, internalformat, 0,
+                                  (*bufObj)->Size, format, type, data,
+                                  "glClearBufferData", false);
 }
 
+
 void GLAPIENTRY
 _mesa_ClearBufferData(GLenum target, GLenum internalformat, GLenum format,
                       GLenum type, const GLvoid *data)
@@ -1955,10 +2525,25 @@ _mesa_ClearBufferData(GLenum target, GLenum internalformat, GLenum format,
    if (!bufObj)
       return;
 
-   clear_buffer_sub_data(ctx, bufObj, internalformat, 0, bufObj->Size,
-                         format, type, data, "glClearBufferData", false);
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, 0, bufObj->Size,
+                               format, type, data, "glClearBufferData", false);
 }
 
+
+void GLAPIENTRY
+_mesa_ClearNamedBufferData_no_error(GLuint buffer, GLenum internalformat,
+                                    GLenum format, GLenum type,
+                                    const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   clear_buffer_sub_data_no_error(ctx, bufObj, internalformat, 0, bufObj->Size,
+                                  format, type, data, "glClearNamedBufferData",
+                                  false);
+}
+
+
 void GLAPIENTRY
 _mesa_ClearNamedBufferData(GLuint buffer, GLenum internalformat,
                            GLenum format, GLenum type, const GLvoid *data)
@@ -1970,8 +2555,40 @@ _mesa_ClearNamedBufferData(GLuint buffer, GLenum internalformat,
    if (!bufObj)
       return;
 
-   clear_buffer_sub_data(ctx, bufObj, internalformat, 0, bufObj->Size,
-                         format, type, data, "glClearNamedBufferData", false);
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, 0, bufObj->Size,
+                               format, type, data, "glClearNamedBufferData",
+                               false);
+}
+
+
+void GLAPIENTRY
+_mesa_ClearNamedBufferDataEXT(GLuint buffer, GLenum internalformat,
+                              GLenum format, GLenum type, const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glClearNamedBufferDataEXT"))
+      return;
+
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, 0, bufObj->Size,
+                               format, type, data, "glClearNamedBufferDataEXT",
+                               false);
+}
+
+
+void GLAPIENTRY
+_mesa_ClearBufferSubData_no_error(GLenum target, GLenum internalformat,
+                                  GLintptr offset, GLsizeiptr size,
+                                  GLenum format, GLenum type,
+                                  const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
+   clear_buffer_sub_data_no_error(ctx, *bufObj, internalformat, offset, size,
+                                  format, type, data, "glClearBufferSubData",
+                                  true);
 }
 
 
@@ -1988,10 +2605,27 @@ _mesa_ClearBufferSubData(GLenum target, GLenum internalformat,
    if (!bufObj)
       return;
 
-   clear_buffer_sub_data(ctx, bufObj, internalformat, offset, size,
-                         format, type, data, "glClearBufferSubData", true);
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, offset, size,
+                               format, type, data, "glClearBufferSubData",
+                               true);
+}
+
+
+void GLAPIENTRY
+_mesa_ClearNamedBufferSubData_no_error(GLuint buffer, GLenum internalformat,
+                                       GLintptr offset, GLsizeiptr size,
+                                       GLenum format, GLenum type,
+                                       const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   clear_buffer_sub_data_no_error(ctx, bufObj, internalformat, offset, size,
+                                  format, type, data,
+                                  "glClearNamedBufferSubData", true);
 }
 
+
 void GLAPIENTRY
 _mesa_ClearNamedBufferSubData(GLuint buffer, GLenum internalformat,
                               GLintptr offset, GLsizeiptr size,
@@ -2006,8 +2640,26 @@ _mesa_ClearNamedBufferSubData(GLuint buffer, GLenum internalformat,
    if (!bufObj)
       return;
 
-   clear_buffer_sub_data(ctx, bufObj, internalformat, offset, size, format,
-                         type, data, "glClearNamedBufferSubData", true);
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, offset, size,
+                               format, type, data, "glClearNamedBufferSubData",
+                               true);
+}
+
+void GLAPIENTRY
+_mesa_ClearNamedBufferSubDataEXT(GLuint buffer, GLenum internalformat,
+                                 GLintptr offset, GLsizeiptr size,
+                                 GLenum format, GLenum type,
+                                 const GLvoid *data)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glClearNamedBufferSubDataEXT"))
+      return;
+
+   clear_buffer_sub_data_error(ctx, bufObj, internalformat, offset, size,
+                               format, type, data, "glClearNamedBufferSubDataEXT",
+                               true);
 }
 
 static GLboolean
@@ -2098,7 +2750,7 @@ _mesa_UnmapBuffer(GLenum target)
 }
 
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer_no_error(GLuint buffer)
+_mesa_UnmapNamedBufferEXT_no_error(GLuint buffer)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
@@ -2107,11 +2759,17 @@ _mesa_UnmapNamedBuffer_no_error(GLuint buffer)
 }
 
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer(GLuint buffer)
+_mesa_UnmapNamedBufferEXT(GLuint buffer)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;
 
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glUnmapNamedBufferEXT(buffer=0)");
+      return GL_FALSE;
+   }
+
    bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, "glUnmapNamedBuffer");
    if (!bufObj)
       return GL_FALSE;
@@ -2233,6 +2891,31 @@ _mesa_GetNamedBufferParameteriv(GLuint buffer, GLenum pname, GLint *params)
    *params = (GLint) parameter;
 }
 
+void GLAPIENTRY
+_mesa_GetNamedBufferParameterivEXT(GLuint buffer, GLenum pname, GLint *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj;
+   GLint64 parameter;
+
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetNamedBufferParameterivEXT: buffer=0");
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glGetNamedBufferParameterivEXT"))
+      return;
+
+   if (!get_buffer_parameter(ctx, bufObj, pname, &parameter,
+                             "glGetNamedBufferParameterivEXT"))
+      return; /* Error already recorded. */
+
+   *params = (GLint) parameter;
+}
+
 void GLAPIENTRY
 _mesa_GetNamedBufferParameteri64v(GLuint buffer, GLenum pname,
                                   GLint64 *params)
@@ -2294,6 +2977,30 @@ _mesa_GetNamedBufferPointerv(GLuint buffer, GLenum pname, GLvoid **params)
    *params = bufObj->Mappings[MAP_USER].Pointer;
 }
 
+void GLAPIENTRY
+_mesa_GetNamedBufferPointervEXT(GLuint buffer, GLenum pname, GLvoid **params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj;
+
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetNamedBufferPointervEXT(buffer=0)");
+      return;
+   }
+   if (pname != GL_BUFFER_MAP_POINTER) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetNamedBufferPointervEXT(pname != "
+                  "GL_BUFFER_MAP_POINTER)");
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glGetNamedBufferPointervEXT"))
+      return;
+
+   *params = bufObj->Mappings[MAP_USER].Pointer;
+}
 
 static void
 copy_buffer_sub_data(struct gl_context *ctx, struct gl_buffer_object *src,
@@ -2404,6 +3111,30 @@ _mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
                         "glCopyBufferSubData");
 }
 
+void GLAPIENTRY
+_mesa_NamedCopyBufferSubDataEXT(GLuint readBuffer, GLuint writeBuffer,
+                                GLintptr readOffset, GLintptr writeOffset,
+                                GLsizeiptr size)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *src, *dst;
+
+   src = _mesa_lookup_bufferobj(ctx, readBuffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, readBuffer,
+                                     &src,
+                                     "glNamedCopyBufferSubDataEXT"))
+      return;
+
+   dst = _mesa_lookup_bufferobj(ctx, writeBuffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, writeBuffer,
+                                     &dst,
+                                     "glNamedCopyBufferSubDataEXT"))
+      return;
+
+   copy_buffer_sub_data(ctx, src, dst, readOffset, writeOffset, size,
+                        "glNamedCopyBufferSubDataEXT");
+}
+
 void GLAPIENTRY
 _mesa_CopyNamedBufferSubData_no_error(GLuint readBuffer, GLuint writeBuffer,
                                       GLintptr readOffset,
@@ -2441,6 +3172,47 @@ _mesa_CopyNamedBufferSubData(GLuint readBuffer, GLuint writeBuffer,
                         "glCopyNamedBufferSubData");
 }
 
+void GLAPIENTRY
+_mesa_InternalBufferSubDataCopyMESA(GLintptr srcBuffer, GLuint srcOffset,
+                                    GLuint dstTargetOrName, GLintptr dstOffset,
+                                    GLsizeiptr size, GLboolean named,
+                                    GLboolean ext_dsa)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *src = (struct gl_buffer_object *)srcBuffer;
+   struct gl_buffer_object *dst;
+   const char *func;
+
+   /* Handle behavior for all 3 variants. */
+   if (named && ext_dsa) {
+      func = "glNamedBufferSubDataEXT";
+      dst = _mesa_lookup_bufferobj(ctx, dstTargetOrName);
+      if (!_mesa_handle_bind_buffer_gen(ctx, dstTargetOrName, &dst, func))
+         goto done;
+   } else if (named) {
+      func = "glNamedBufferSubData";
+      dst = _mesa_lookup_bufferobj_err(ctx, dstTargetOrName, func);
+      if (!dst)
+         goto done;
+   } else {
+      assert(!ext_dsa);
+      func = "glBufferSubData";
+      dst = get_buffer(ctx, func, dstTargetOrName, GL_INVALID_OPERATION);
+      if (!dst)
+         goto done;
+   }
+
+   if (!validate_buffer_sub_data(ctx, dst, dstOffset, size, func))
+      goto done; /* the error is already set */
+
+   dst->MinMaxCacheDirty = true;
+   ctx->Driver.CopyBufferSubData(ctx, src, dst, srcOffset, dstOffset, size);
+
+done:
+   /* The caller passes the reference to this function, so unreference it. */
+   _mesa_reference_buffer_object(ctx, &src, NULL);
+}
+
 static bool
 validate_map_buffer_range(struct gl_context *ctx,
                           struct gl_buffer_object *bufObj, GLintptr offset,
@@ -2687,30 +3459,55 @@ _mesa_MapNamedBufferRange_no_error(GLuint buffer, GLintptr offset,
                            "glMapNamedBufferRange");
 }
 
-void * GLAPIENTRY
-_mesa_MapNamedBufferRange(GLuint buffer, GLintptr offset, GLsizeiptr length,
-                          GLbitfield access)
+static void *
+map_named_buffer_range(GLuint buffer, GLintptr offset, GLsizeiptr length,
+                       GLbitfield access, bool dsa_ext, const char *func)
 {
    GET_CURRENT_CONTEXT(ctx);
-   struct gl_buffer_object *bufObj;
+   struct gl_buffer_object *bufObj = NULL;
 
    if (!ctx->Extensions.ARB_map_buffer_range) {
       _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "glMapNamedBufferRange("
-                  "ARB_map_buffer_range not supported)");
+                  "%s(ARB_map_buffer_range not supported)", func);
       return NULL;
    }
 
-   bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, "glMapNamedBufferRange");
-   if (!bufObj)
+   if (dsa_ext) {
+      bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+      if (!_mesa_handle_bind_buffer_gen(ctx, buffer, &bufObj, func))
+         return NULL;
+   } else {
+      bufObj = _mesa_lookup_bufferobj_err(ctx, buffer, func);
+      if (!bufObj)
+         return NULL;
+   }
+
+   if (!validate_map_buffer_range(ctx, bufObj, offset, length, access, func))
       return NULL;
 
-   if (!validate_map_buffer_range(ctx, bufObj, offset, length, access,
-                                  "glMapNamedBufferRange"))
+   return map_buffer_range(ctx, bufObj, offset, length, access, func);
+}
+
+void * GLAPIENTRY
+_mesa_MapNamedBufferRangeEXT(GLuint buffer, GLintptr offset, GLsizeiptr length,
+                             GLbitfield access)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glMapNamedBufferRangeEXT(buffer=0)");
       return NULL;
+   }
+   return map_named_buffer_range(buffer, offset, length, access, true,
+                                 "glMapNamedBufferRangeEXT");
+}
 
-   return map_buffer_range(ctx, bufObj, offset, length, access,
-                           "glMapNamedBufferRange");
+void * GLAPIENTRY
+_mesa_MapNamedBufferRange(GLuint buffer, GLintptr offset, GLsizeiptr length,
+                          GLbitfield access)
+{
+   return map_named_buffer_range(buffer, offset, length, access, false,
+                                 "glMapNamedBufferRange");
 }
 
 /**
@@ -2734,6 +3531,7 @@ get_map_buffer_access_flags(struct gl_context *ctx, GLenum access,
       *flags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
       return _mesa_is_desktop_gl(ctx);
    default:
+      *flags = 0;
       return false;
    }
 }
@@ -2815,6 +3613,34 @@ _mesa_MapNamedBuffer(GLuint buffer, GLenum access)
                            "glMapNamedBuffer");
 }
 
+void * GLAPIENTRY
+_mesa_MapNamedBufferEXT(GLuint buffer, GLenum access)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   GLbitfield accessFlags;
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glMapNamedBufferEXT(buffer=0)");
+      return NULL;
+   }
+   if (!get_map_buffer_access_flags(ctx, access, &accessFlags)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glMapNamedBufferEXT(invalid access)");
+      return NULL;
+   }
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glMapNamedBufferEXT"))
+      return NULL;
+
+   if (!validate_map_buffer_range(ctx, bufObj, 0, bufObj->Size, accessFlags,
+                                  "glMapNamedBufferEXT"))
+      return NULL;
+
+   return map_buffer_range(ctx, bufObj, 0, bufObj->Size, accessFlags,
+                           "glMapNamedBufferEXT");
+}
 
 static void
 flush_mapped_buffer_range(struct gl_context *ctx,
@@ -2924,123 +3750,42 @@ _mesa_FlushMappedNamedBufferRange(GLuint buffer, GLintptr offset,
 
    flush_mapped_buffer_range(ctx, bufObj, offset, length,
                              "glFlushMappedNamedBufferRange");
-}
-
-
-/**
- * Binds a buffer object to a uniform buffer binding point.
- *
- * The caller is responsible for flushing vertices and updating
- * NewDriverState.
- */
-static void
-set_ubo_binding(struct gl_context *ctx,
-                struct gl_uniform_buffer_binding *binding,
-                struct gl_buffer_object *bufObj,
-                GLintptr offset,
-                GLsizeiptr size,
-                GLboolean autoSize)
-{
-   _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
-
-   binding->Offset = offset;
-   binding->Size = size;
-   binding->AutomaticSize = autoSize;
-
-   /* If this is a real buffer object, mark it has having been used
-    * at some point as a UBO.
-    */
-   if (size >= 0)
-      bufObj->UsageHistory |= USAGE_UNIFORM_BUFFER;
-}
-
-/**
- * Binds a buffer object to a shader storage buffer binding point.
- *
- * The caller is responsible for flushing vertices and updating
- * NewDriverState.
- */
-static void
-set_ssbo_binding(struct gl_context *ctx,
-                 struct gl_shader_storage_buffer_binding *binding,
-                 struct gl_buffer_object *bufObj,
-                 GLintptr offset,
-                 GLsizeiptr size,
-                 GLboolean autoSize)
-{
-   _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
-
-   binding->Offset = offset;
-   binding->Size = size;
-   binding->AutomaticSize = autoSize;
-
-   /* If this is a real buffer object, mark it has having been used
-    * at some point as a SSBO.
-    */
-   if (size >= 0)
-      bufObj->UsageHistory |= USAGE_SHADER_STORAGE_BUFFER;
-}
-
-/**
- * Binds a buffer object to a uniform buffer binding point.
- *
- * Unlike set_ubo_binding(), this function also flushes vertices
- * and updates NewDriverState.  It also checks if the binding
- * has actually changed before updating it.
- */
-static void
-bind_uniform_buffer(struct gl_context *ctx,
-                    GLuint index,
-                    struct gl_buffer_object *bufObj,
-                    GLintptr offset,
-                    GLsizeiptr size,
-                    GLboolean autoSize)
-{
-   struct gl_uniform_buffer_binding *binding =
-      &ctx->UniformBufferBindings[index];
-
-   if (binding->BufferObject == bufObj &&
-       binding->Offset == offset &&
-       binding->Size == size &&
-       binding->AutomaticSize == autoSize) {
-      return;
-   }
-
-   FLUSH_VERTICES(ctx, 0);
-   ctx->NewDriverState |= ctx->DriverFlags.NewUniformBuffer;
-
-   set_ubo_binding(ctx, binding, bufObj, offset, size, autoSize);
-}
-
-/**
- * Binds a buffer object to a shader storage buffer binding point.
- *
- * Unlike set_ssbo_binding(), this function also flushes vertices
- * and updates NewDriverState.  It also checks if the binding
- * has actually changed before updating it.
- */
-static void
-bind_shader_storage_buffer(struct gl_context *ctx,
-                           GLuint index,
-                           struct gl_buffer_object *bufObj,
-                           GLintptr offset,
-                           GLsizeiptr size,
-                           GLboolean autoSize)
+}
+
+void GLAPIENTRY
+_mesa_FlushMappedNamedBufferRangeEXT(GLuint buffer, GLintptr offset,
+                                     GLsizeiptr length)
 {
-   struct gl_shader_storage_buffer_binding *binding =
-      &ctx->ShaderStorageBufferBindings[index];
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj;
 
-   if (binding->BufferObject == bufObj &&
-       binding->Offset == offset &&
-       binding->Size == size &&
-       binding->AutomaticSize == autoSize) {
+   if (!buffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glFlushMappedNamedBufferRangeEXT(buffer=0)");
       return;
    }
 
-   FLUSH_VERTICES(ctx, 0);
-   ctx->NewDriverState |= ctx->DriverFlags.NewShaderStorageBuffer;
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                     &bufObj, "glFlushMappedNamedBufferRangeEXT"))
+      return;
+
+   flush_mapped_buffer_range(ctx, bufObj, offset, length,
+                             "glFlushMappedNamedBufferRangeEXT");
+}
+
+static void
+bind_buffer_range_uniform_buffer(struct gl_context *ctx, GLuint index,
+                                 struct gl_buffer_object *bufObj,
+                                 GLintptr offset, GLsizeiptr size)
+{
+   if (!bufObj) {
+      offset = -1;
+      size = -1;
+   }
 
-   set_ssbo_binding(ctx, binding, bufObj, offset, size, autoSize);
+   _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
+   bind_uniform_buffer(ctx, index, bufObj, offset, size, GL_FALSE);
 }
 
 /**
@@ -3051,11 +3796,9 @@ bind_shader_storage_buffer(struct gl_context *ctx,
  * \param size  size of the buffer object region
  */
 static void
-bind_buffer_range_uniform_buffer(struct gl_context *ctx,
-                                GLuint index,
-                                struct gl_buffer_object *bufObj,
-                                GLintptr offset,
-                                GLsizeiptr size)
+bind_buffer_range_uniform_buffer_err(struct gl_context *ctx, GLuint index,
+                                     struct gl_buffer_object *bufObj,
+                                     GLintptr offset, GLsizeiptr size)
 {
    if (index >= ctx->Const.MaxUniformBufferBindings) {
       _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
@@ -3069,13 +3812,23 @@ bind_buffer_range_uniform_buffer(struct gl_context *ctx,
       return;
    }
 
-   if (bufObj == ctx->Shared->NullBufferObj) {
+   bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
+}
+
+static void
+bind_buffer_range_shader_storage_buffer(struct gl_context *ctx,
+                                        GLuint index,
+                                        struct gl_buffer_object *bufObj,
+                                        GLintptr offset,
+                                        GLsizeiptr size)
+{
+   if (!bufObj) {
       offset = -1;
       size = -1;
    }
 
-   _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
-   bind_uniform_buffer(ctx, index, bufObj, offset, size, GL_FALSE);
+   _mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer, bufObj);
+   bind_shader_storage_buffer(ctx, index, bufObj, offset, size, GL_FALSE);
 }
 
 /**
@@ -3086,11 +3839,10 @@ bind_buffer_range_uniform_buffer(struct gl_context *ctx,
  * \param size  size of the buffer object region
  */
 static void
-bind_buffer_range_shader_storage_buffer(struct gl_context *ctx,
-                                        GLuint index,
-                                        struct gl_buffer_object *bufObj,
-                                        GLintptr offset,
-                                        GLsizeiptr size)
+bind_buffer_range_shader_storage_buffer_err(struct gl_context *ctx,
+                                            GLuint index,
+                                            struct gl_buffer_object *bufObj,
+                                            GLintptr offset, GLsizeiptr size)
 {
    if (index >= ctx->Const.MaxShaderStorageBufferBindings) {
       _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
@@ -3104,127 +3856,49 @@ bind_buffer_range_shader_storage_buffer(struct gl_context *ctx,
       return;
    }
 
-   if (bufObj == ctx->Shared->NullBufferObj) {
-      offset = -1;
-      size = -1;
-   }
-
-   _mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer, bufObj);
-   bind_shader_storage_buffer(ctx, index, bufObj, offset, size, GL_FALSE);
-}
-
-/**
- * Bind a buffer object to a uniform block binding point.
- * As above, but offset = 0.
- */
-static void
-bind_buffer_base_uniform_buffer(struct gl_context *ctx,
-                               GLuint index,
-                               struct gl_buffer_object *bufObj)
-{
-   if (index >= ctx->Const.MaxUniformBufferBindings) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
-      return;
-   }
-
-   _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
-
-   if (bufObj == ctx->Shared->NullBufferObj)
-      bind_uniform_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
-   else
-      bind_uniform_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
+   bind_buffer_range_shader_storage_buffer(ctx, index, bufObj, offset, size);
 }
 
-/**
- * Bind a buffer object to a shader storage block binding point.
- * As above, but offset = 0.
- */
 static void
-bind_buffer_base_shader_storage_buffer(struct gl_context *ctx,
-                                       GLuint index,
-                                       struct gl_buffer_object *bufObj)
+bind_buffer_range_atomic_buffer(struct gl_context *ctx, GLuint index,
+                                 struct gl_buffer_object *bufObj,
+                                 GLintptr offset, GLsizeiptr size)
 {
-   if (index >= ctx->Const.MaxShaderStorageBufferBindings) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
-      return;
+   if (!bufObj) {
+      offset = -1;
+      size = -1;
    }
 
-   _mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer, bufObj);
-
-   if (bufObj == ctx->Shared->NullBufferObj)
-      bind_shader_storage_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
-   else
-      bind_shader_storage_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
-}
-
-/**
- * Binds a buffer object to an atomic buffer binding point.
- *
- * The caller is responsible for validating the offset,
- * flushing the vertices and updating NewDriverState.
- */
-static void
-set_atomic_buffer_binding(struct gl_context *ctx,
-                          struct gl_atomic_buffer_binding *binding,
-                          struct gl_buffer_object *bufObj,
-                          GLintptr offset,
-                          GLsizeiptr size)
-{
-   _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
-
-   if (bufObj == ctx->Shared->NullBufferObj) {
-      binding->Offset = 0;
-      binding->Size = 0;
-   } else {
-      binding->Offset = offset;
-      binding->Size = size;
-      bufObj->UsageHistory |= USAGE_ATOMIC_COUNTER_BUFFER;
-   }
+   _mesa_reference_buffer_object(ctx, &ctx->AtomicBuffer, bufObj);
+   bind_atomic_buffer(ctx, index, bufObj, offset, size, GL_FALSE);
 }
 
 /**
- * Binds a buffer object to an atomic buffer binding point.
- *
- * Unlike set_atomic_buffer_binding(), this function also validates the
- * index and offset, flushes vertices, and updates NewDriverState.
- * It also checks if the binding has actually changing before
- * updating it.
+ * Bind a region of a buffer object to an atomic storage block binding point.
+ * \param index  the shader storage buffer binding point index
+ * \param bufObj  the buffer object
+ * \param offset  offset to the start of buffer object region
+ * \param size  size of the buffer object region
  */
 static void
-bind_atomic_buffer(struct gl_context *ctx,
-                   unsigned index,
-                   struct gl_buffer_object *bufObj,
-                   GLintptr offset,
-                   GLsizeiptr size,
-                   const char *name)
+bind_buffer_range_atomic_buffer_err(struct gl_context *ctx,
+                                    GLuint index,
+                                    struct gl_buffer_object *bufObj,
+                                    GLintptr offset, GLsizeiptr size)
 {
-   struct gl_atomic_buffer_binding *binding;
-
    if (index >= ctx->Const.MaxAtomicBufferBindings) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%d)", name, index);
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
       return;
    }
 
    if (offset & (ATOMIC_COUNTER_SIZE - 1)) {
       _mesa_error(ctx, GL_INVALID_VALUE,
-                  "%s(offset misaligned %d/%d)", name, (int) offset,
-                  ATOMIC_COUNTER_SIZE);
-      return;
-   }
-
-   _mesa_reference_buffer_object(ctx, &ctx->AtomicBuffer, bufObj);
-
-   binding = &ctx->AtomicBufferBindings[index];
-   if (binding->BufferObject == bufObj &&
-       binding->Offset == offset &&
-       binding->Size == size) {
+                 "glBindBufferRange(offset misaligned %d/%d)", (int) offset,
+                 ATOMIC_COUNTER_SIZE);
       return;
    }
 
-   FLUSH_VERTICES(ctx, 0);
-   ctx->NewDriverState |= ctx->DriverFlags.NewAtomicBuffer;
-
-   set_atomic_buffer_binding(ctx, binding, bufObj, offset, size);
+   bind_buffer_range_atomic_buffer(ctx, index, bufObj, offset, size);
 }
 
 static inline bool
@@ -3325,11 +3999,9 @@ error_check_bind_shader_storage_buffers(struct gl_context *ctx,
 static void
 unbind_uniform_buffers(struct gl_context *ctx, GLuint first, GLsizei count)
 {
-   struct gl_buffer_object *bufObj = ctx->Shared->NullBufferObj;
-
    for (int i = 0; i < count; i++)
-      set_ubo_binding(ctx, &ctx->UniformBufferBindings[first + i],
-                      bufObj, -1, -1, GL_TRUE);
+      set_buffer_binding(ctx, &ctx->UniformBufferBindings[first + i],
+                         NULL, -1, -1, GL_TRUE, 0);
 }
 
 /**
@@ -3340,11 +4012,9 @@ static void
 unbind_shader_storage_buffers(struct gl_context *ctx, GLuint first,
                               GLsizei count)
 {
-   struct gl_buffer_object *bufObj = ctx->Shared->NullBufferObj;
-
    for (int i = 0; i < count; i++)
-      set_ssbo_binding(ctx, &ctx->ShaderStorageBufferBindings[first + i],
-                       bufObj, -1, -1, GL_TRUE);
+      set_buffer_binding(ctx, &ctx->ShaderStorageBufferBindings[first + i],
+                         NULL, -1, -1, GL_TRUE, 0);
 }
 
 static void
@@ -3396,9 +4066,8 @@ bind_uniform_buffers(struct gl_context *ctx, GLuint first, GLsizei count,
    _mesa_HashLockMutex(ctx->Shared->BufferObjects);
 
    for (int i = 0; i < count; i++) {
-      struct gl_uniform_buffer_binding *binding =
+      struct gl_buffer_binding *binding =
          &ctx->UniformBufferBindings[first + i];
-      struct gl_buffer_object *bufObj;
       GLintptr offset = 0;
       GLsizeiptr size = 0;
 
@@ -3440,17 +4109,9 @@ bind_uniform_buffers(struct gl_context *ctx, GLuint first, GLsizei count,
          size = sizes[i];
       }
 
-      if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
-         bufObj = binding->BufferObject;
-      else
-         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, caller);
-
-      if (bufObj) {
-         if (bufObj == ctx->Shared->NullBufferObj)
-            set_ubo_binding(ctx, binding, bufObj, -1, -1, !range);
-         else
-            set_ubo_binding(ctx, binding, bufObj, offset, size, !range);
-      }
+      set_buffer_multi_binding(ctx, buffers, i, caller,
+                               binding, offset, size, range,
+                               USAGE_UNIFORM_BUFFER);
    }
 
    _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
@@ -3506,9 +4167,8 @@ bind_shader_storage_buffers(struct gl_context *ctx, GLuint first,
    _mesa_HashLockMutex(ctx->Shared->BufferObjects);
 
    for (int i = 0; i < count; i++) {
-      struct gl_shader_storage_buffer_binding *binding =
+      struct gl_buffer_binding *binding =
          &ctx->ShaderStorageBufferBindings[first + i];
-      struct gl_buffer_object *bufObj;
       GLintptr offset = 0;
       GLsizeiptr size = 0;
 
@@ -3550,17 +4210,9 @@ bind_shader_storage_buffers(struct gl_context *ctx, GLuint first,
          size = sizes[i];
       }
 
-      if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
-         bufObj = binding->BufferObject;
-      else
-         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, caller);
-
-      if (bufObj) {
-         if (bufObj == ctx->Shared->NullBufferObj)
-            set_ssbo_binding(ctx, binding, bufObj, -1, -1, !range);
-         else
-            set_ssbo_binding(ctx, binding, bufObj, offset, size, !range);
-      }
+      set_buffer_multi_binding(ctx, buffers, i, caller,
+                               binding, offset, size, range,
+                               USAGE_SHADER_STORAGE_BUFFER);
    }
 
    _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
@@ -3622,11 +4274,9 @@ unbind_xfb_buffers(struct gl_context *ctx,
                    struct gl_transform_feedback_object *tfObj,
                    GLuint first, GLsizei count)
 {
-   struct gl_buffer_object * const bufObj = ctx->Shared->NullBufferObj;
-
    for (int i = 0; i < count; i++)
       _mesa_set_transform_feedback_binding(ctx, tfObj, first + i,
-                                           bufObj, 0, 0);
+                                           NULL, 0, 0);
 }
 
 static void
@@ -3690,9 +4340,6 @@ bind_xfb_buffers(struct gl_context *ctx,
       GLsizeiptr size = 0;
 
       if (range) {
-         offset = offsets[i];
-         size = sizes[i];
-
          if (!bind_buffers_check_offset_and_size(ctx, i, offsets, sizes))
             continue;
 
@@ -3738,12 +4385,16 @@ bind_xfb_buffers(struct gl_context *ctx,
 
       if (boundBufObj && boundBufObj->Name == buffers[i])
          bufObj = boundBufObj;
-      else
-         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, caller);
+      else {
+         bool error;
+         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, caller,
+                                                    &error);
+         if (error)
+            continue;
+      }
 
-      if (bufObj)
-         _mesa_set_transform_feedback_binding(ctx, tfObj, index, bufObj,
-                                              offset, size);
+      _mesa_set_transform_feedback_binding(ctx, tfObj, index, bufObj,
+                                           offset, size);
    }
 
    _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
@@ -3784,11 +4435,9 @@ error_check_bind_atomic_buffers(struct gl_context *ctx,
 static void
 unbind_atomic_buffers(struct gl_context *ctx, GLuint first, GLsizei count)
 {
-   struct gl_buffer_object * const bufObj = ctx->Shared->NullBufferObj;
-
    for (int i = 0; i < count; i++)
-      set_atomic_buffer_binding(ctx, &ctx->AtomicBufferBindings[first + i],
-                                bufObj, -1, -1);
+      set_buffer_binding(ctx, &ctx->AtomicBufferBindings[first + i],
+                         NULL, -1, -1, GL_TRUE, 0);
 }
 
 static void
@@ -3843,9 +4492,8 @@ bind_atomic_buffers(struct gl_context *ctx,
    _mesa_HashLockMutex(ctx->Shared->BufferObjects);
 
    for (int i = 0; i < count; i++) {
-      struct gl_atomic_buffer_binding *binding =
+      struct gl_buffer_binding *binding =
          &ctx->AtomicBufferBindings[first + i];
-      struct gl_buffer_object *bufObj;
       GLintptr offset = 0;
       GLsizeiptr size = 0;
 
@@ -3884,21 +4532,17 @@ bind_atomic_buffers(struct gl_context *ctx,
          size = sizes[i];
       }
 
-      if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
-         bufObj = binding->BufferObject;
-      else
-         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, caller);
-
-      if (bufObj)
-         set_atomic_buffer_binding(ctx, binding, bufObj, offset, size);
+      set_buffer_multi_binding(ctx, buffers, i, caller,
+                               binding, offset, size, range,
+                               USAGE_ATOMIC_COUNTER_BUFFER);
    }
 
    _mesa_HashUnlockMutex(ctx->Shared->BufferObjects);
 }
 
-void GLAPIENTRY
-_mesa_BindBufferRange(GLenum target, GLuint index,
-                      GLuint buffer, GLintptr offset, GLsizeiptr size)
+static ALWAYS_INLINE void
+bind_buffer_range(GLenum target, GLuint index, GLuint buffer, GLintptr offset,
+                  GLsizeiptr size, bool no_error)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;
@@ -3910,51 +4554,92 @@ _mesa_BindBufferRange(GLenum target, GLuint index,
    }
 
    if (buffer == 0) {
-      bufObj = ctx->Shared->NullBufferObj;
+      bufObj = NULL;
    } else {
       bufObj = _mesa_lookup_bufferobj(ctx, buffer);
-   }
-   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
-                                     &bufObj, "glBindBufferRange"))
-      return;
+      if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                        &bufObj, "glBindBufferRange"))
+         return;
 
-   if (!bufObj) {
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "glBindBufferRange(invalid buffer=%u)", buffer);
-      return;
+      if (!no_error && !bufObj) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBindBufferRange(invalid buffer=%u)", buffer);
+         return;
+      }
    }
 
-   if (buffer != 0) {
-      if (size <= 0) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)",
-                     (int) size);
+   if (no_error) {
+      switch (target) {
+      case GL_TRANSFORM_FEEDBACK_BUFFER:
+         _mesa_bind_buffer_range_xfb(ctx, ctx->TransformFeedback.CurrentObject,
+                                     index, bufObj, offset, size);
          return;
+      case GL_UNIFORM_BUFFER:
+         bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
+         return;
+      case GL_SHADER_STORAGE_BUFFER:
+         bind_buffer_range_shader_storage_buffer(ctx, index, bufObj, offset,
+                                                 size);
+         return;
+      case GL_ATOMIC_COUNTER_BUFFER:
+         bind_buffer_range_atomic_buffer(ctx, index, bufObj, offset, size);
+         return;
+      default:
+         unreachable("invalid BindBufferRange target with KHR_no_error");
+      }
+   } else {
+      if (buffer != 0) {
+         if (size <= 0) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)",
+                        (int) size);
+            return;
+         }
       }
-   }
 
-   switch (target) {
-   case GL_TRANSFORM_FEEDBACK_BUFFER:
-      _mesa_bind_buffer_range_transform_feedback(ctx,
-                                                 ctx->TransformFeedback.CurrentObject,
-                                                 index, bufObj, offset, size,
-                                                 false);
-      return;
-   case GL_UNIFORM_BUFFER:
-      bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
-      return;
-   case GL_SHADER_STORAGE_BUFFER:
-      bind_buffer_range_shader_storage_buffer(ctx, index, bufObj, offset, size);
-      return;
-   case GL_ATOMIC_COUNTER_BUFFER:
-      bind_atomic_buffer(ctx, index, bufObj, offset, size,
-                         "glBindBufferRange");
-      return;
-   default:
-      _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)");
-      return;
+      switch (target) {
+      case GL_TRANSFORM_FEEDBACK_BUFFER:
+         if (!_mesa_validate_buffer_range_xfb(ctx,
+                                              ctx->TransformFeedback.CurrentObject,
+                                              index, bufObj, offset, size,
+                                              false))
+            return;
+
+         _mesa_bind_buffer_range_xfb(ctx, ctx->TransformFeedback.CurrentObject,
+                                     index, bufObj, offset, size);
+         return;
+      case GL_UNIFORM_BUFFER:
+         bind_buffer_range_uniform_buffer_err(ctx, index, bufObj, offset,
+                                              size);
+         return;
+      case GL_SHADER_STORAGE_BUFFER:
+         bind_buffer_range_shader_storage_buffer_err(ctx, index, bufObj,
+                                                     offset, size);
+         return;
+      case GL_ATOMIC_COUNTER_BUFFER:
+         bind_buffer_range_atomic_buffer_err(ctx, index, bufObj,
+                                             offset, size);
+         return;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)");
+         return;
+      }
    }
 }
 
+void GLAPIENTRY
+_mesa_BindBufferRange_no_error(GLenum target, GLuint index, GLuint buffer,
+                               GLintptr offset, GLsizeiptr size)
+{
+   bind_buffer_range(target, index, buffer, offset, size, true);
+}
+
+void GLAPIENTRY
+_mesa_BindBufferRange(GLenum target, GLuint index,
+                      GLuint buffer, GLintptr offset, GLsizeiptr size)
+{
+   bind_buffer_range(target, index, buffer, offset, size, false);
+}
+
 void GLAPIENTRY
 _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
 {
@@ -3967,18 +4652,18 @@ _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
    }
 
    if (buffer == 0) {
-      bufObj = ctx->Shared->NullBufferObj;
+      bufObj = NULL;
    } else {
       bufObj = _mesa_lookup_bufferobj(ctx, buffer);
-   }
-   if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
-                                     &bufObj, "glBindBufferBase"))
-      return;
+      if (!_mesa_handle_bind_buffer_gen(ctx, buffer,
+                                        &bufObj, "glBindBufferBase"))
+         return;
 
-   if (!bufObj) {
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "glBindBufferBase(invalid buffer=%u)", buffer);
-      return;
+      if (!bufObj) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBindBufferBase(invalid buffer=%u)", buffer);
+         return;
+      }
    }
 
    /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
@@ -4020,8 +4705,7 @@ _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
       bind_buffer_base_shader_storage_buffer(ctx, index, bufObj);
       return;
    case GL_ATOMIC_COUNTER_BUFFER:
-      bind_atomic_buffer(ctx, index, bufObj, 0, 0,
-                         "glBindBufferBase");
+      bind_buffer_base_atomic_buffer(ctx, index, bufObj);
       return;
    default:
       _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)");
@@ -4101,6 +4785,25 @@ _mesa_BindBuffersBase(GLenum target, GLuint first, GLsizei count,
    }
 }
 
+static ALWAYS_INLINE void
+invalidate_buffer_subdata(struct gl_context *ctx,
+                          struct gl_buffer_object *bufObj, GLintptr offset,
+                          GLsizeiptr length)
+{
+   if (ctx->Driver.InvalidateBufferSubData)
+      ctx->Driver.InvalidateBufferSubData(ctx, bufObj, offset, length);
+}
+
+void GLAPIENTRY
+_mesa_InvalidateBufferSubData_no_error(GLuint buffer, GLintptr offset,
+                                       GLsizeiptr length)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   invalidate_buffer_subdata(ctx, bufObj, offset, length);
+}
+
 void GLAPIENTRY
 _mesa_InvalidateBufferSubData(GLuint buffer, GLintptr offset,
                               GLsizeiptr length)
@@ -4150,8 +4853,16 @@ _mesa_InvalidateBufferSubData(GLuint buffer, GLintptr offset,
       return;
    }
 
-   if (ctx->Driver.InvalidateBufferSubData)
-      ctx->Driver.InvalidateBufferSubData(ctx, bufObj, offset, length);
+   invalidate_buffer_subdata(ctx, bufObj, offset, length);
+}
+
+void GLAPIENTRY
+_mesa_InvalidateBufferData_no_error(GLuint buffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_buffer_object *bufObj =_mesa_lookup_bufferobj(ctx, buffer);
+   invalidate_buffer_subdata(ctx, bufObj, 0, bufObj->Size);
 }
 
 void GLAPIENTRY
@@ -4188,8 +4899,7 @@ _mesa_InvalidateBufferData(GLuint buffer)
       return;
    }
 
-   if (ctx->Driver.InvalidateBufferSubData)
-      ctx->Driver.InvalidateBufferSubData(ctx, bufObj, 0, bufObj->Size);
+   invalidate_buffer_subdata(ctx, bufObj, 0, bufObj->Size);
 }
 
 static void
@@ -4269,3 +4979,31 @@ _mesa_NamedBufferPageCommitmentARB(GLuint buffer, GLintptr offset,
    buffer_page_commitment(ctx, bufferObj, offset, size, commit,
                           "glNamedBufferPageCommitmentARB");
 }
+
+void GLAPIENTRY
+_mesa_NamedBufferPageCommitmentEXT(GLuint buffer, GLintptr offset,
+                                   GLsizeiptr size, GLboolean commit)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufferObj;
+
+   /* Use NamedBuffer* functions logic from EXT_direct_state_access */
+   if (buffer != 0) {
+      bufferObj = _mesa_lookup_bufferobj(ctx, buffer);
+      if (!_mesa_handle_bind_buffer_gen(ctx, buffer, &bufferObj,
+                                        "glNamedBufferPageCommitmentEXT"))
+         return;
+   } else {
+      /* GL_EXT_direct_state_access says about NamedBuffer* functions:
+       *
+       *   There is no buffer corresponding to the name zero, these commands
+       *   generate the INVALID_OPERATION error if the buffer parameter is
+       *   zero.
+       */
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glNamedBufferPageCommitmentEXT(buffer = 0)");
+      return;
+   }
+   buffer_page_commitment(ctx, bufferObj, offset, size, commit,
+                          "glNamedBufferPageCommitmentEXT");
+}