+ vmw_fifo_resource_dec(dev_priv);
+
+ return 0;
+}
+
+/*
+ * DX shader code:
+ */
+
+/**
+ * vmw_dx_shader_commit_notify - Notify that a shader operation has been
+ * committed to hardware from a user-supplied command stream.
+ *
+ * @res: Pointer to the shader resource.
+ * @state: Indicating whether a creation or removal has been committed.
+ *
+ */
+static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
+ enum vmw_cmdbuf_res_state state)
+{
+ struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
+ struct vmw_private *dev_priv = res->dev_priv;
+
+ if (state == VMW_CMDBUF_RES_ADD) {
+ mutex_lock(&dev_priv->binding_mutex);
+ vmw_cotable_add_resource(shader->cotable,
+ &shader->cotable_head);
+ shader->committed = true;
+ res->id = shader->id;
+ mutex_unlock(&dev_priv->binding_mutex);
+ } else {
+ mutex_lock(&dev_priv->binding_mutex);
+ list_del_init(&shader->cotable_head);
+ shader->committed = false;
+ res->id = -1;
+ mutex_unlock(&dev_priv->binding_mutex);
+ }
+}
+
+/**
+ * vmw_dx_shader_unscrub - Have the device reattach a MOB to a DX shader.
+ *
+ * @res: The shader resource
+ *
+ * This function reverts a scrub operation.
+ */
+static int vmw_dx_shader_unscrub(struct vmw_resource *res)
+{
+ struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdDXBindShader body;
+ } *cmd;
+
+ if (!list_empty(&shader->cotable_head) || !shader->committed)
+ return 0;
+
+ cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd),
+ shader->ctx->id);
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for shader "
+ "scrubbing.\n");
+ return -ENOMEM;
+ }
+
+ cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.cid = shader->ctx->id;
+ cmd->body.shid = shader->id;
+ cmd->body.mobid = res->backup->base.mem.start;
+ cmd->body.offsetInBytes = res->backup_offset;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ vmw_cotable_add_resource(shader->cotable, &shader->cotable_head);
+
+ return 0;
+}
+
+/**
+ * vmw_dx_shader_create - The DX shader create callback
+ *
+ * @res: The DX shader resource
+ *
+ * The create callback is called as part of resource validation and
+ * makes sure that we unscrub the shader if it's previously been scrubbed.
+ */
+static int vmw_dx_shader_create(struct vmw_resource *res)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
+ int ret = 0;
+
+ WARN_ON_ONCE(!shader->committed);
+
+ if (!list_empty(&res->mob_head)) {
+ mutex_lock(&dev_priv->binding_mutex);
+ ret = vmw_dx_shader_unscrub(res);
+ mutex_unlock(&dev_priv->binding_mutex);
+ }
+
+ res->id = shader->id;
+ return ret;
+}
+
+/**
+ * vmw_dx_shader_bind - The DX shader bind callback
+ *
+ * @res: The DX shader resource
+ * @val_buf: Pointer to the validate buffer.
+ *
+ */
+static int vmw_dx_shader_bind(struct vmw_resource *res,
+ struct ttm_validate_buffer *val_buf)
+{
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct ttm_buffer_object *bo = val_buf->bo;
+
+ BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
+ mutex_lock(&dev_priv->binding_mutex);
+ vmw_dx_shader_unscrub(res);
+ mutex_unlock(&dev_priv->binding_mutex);
+
+ return 0;
+}
+
+/**
+ * vmw_dx_shader_scrub - Have the device unbind a MOB from a DX shader.
+ *
+ * @res: The shader resource
+ *
+ * This function unbinds a MOB from the DX shader without requiring the
+ * MOB dma_buffer to be reserved. The driver still considers the MOB bound.
+ * However, once the driver eventually decides to unbind the MOB, it doesn't
+ * need to access the context.
+ */
+static int vmw_dx_shader_scrub(struct vmw_resource *res)
+{
+ struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
+ struct vmw_private *dev_priv = res->dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdDXBindShader body;
+ } *cmd;
+
+ if (list_empty(&shader->cotable_head))
+ return 0;
+
+ WARN_ON_ONCE(!shader->committed);
+ cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for shader "
+ "scrubbing.\n");
+ return -ENOMEM;
+ }
+
+ cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.cid = shader->ctx->id;
+ cmd->body.shid = res->id;
+ cmd->body.mobid = SVGA3D_INVALID_ID;
+ cmd->body.offsetInBytes = 0;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+ res->id = -1;
+ list_del_init(&shader->cotable_head);