text: /*
   * Copyright 2012 Red Hat Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   * Authors: Ben Skeggs
   */
  #include "channv50.h"
  #include "rootnv50.h"
  
  #include <core/client.h>
  
  #include <nvif/class.h>
  #include <nvif/unpack.h>
  
  int
  nv50_disp_oimm_new(const struct nv50_disp_chan_func *func,
  		   const struct nv50_disp_chan_mthd *mthd,
  		   struct nv50_disp_root *root, int chid,
  		   const struct nvkm_oclass *oclass, void *data, u32 size,
  		   struct nvkm_object **pobject)
  {
  	union {
  		struct nv50_disp_overlay_v0 v0;
  	} *args = data;
  	struct nvkm_object *parent = oclass->parent;
  	struct nv50_disp *disp = root->disp;
  	int head, ret;
  
  	nvif_ioctl(parent, "create disp overlay size %d\n", size);
  	if (nvif_unpack(args->v0, 0, 0, false)) {
  		nvif_ioctl(parent, "create disp overlay vers %d head %d\n",
  			   args->v0.version, args->v0.head);
  		if (args->v0.head > disp->base.head.nr)
  			return -EINVAL;
  		head = args->v0.head;
  	} else
  		return ret;
  
  	return nv50_disp_chan_new_(func, mthd, root, chid + head,
  				   head, oclass, pobject);
  }
  
  const struct nv50_disp_pioc_oclass
  nv50_disp_oimm_oclass = {
  	.base.oclass = NV50_DISP_OVERLAY,
  	.base.minver = 0,
  	.base.maxver = 0,
  	.ctor = nv50_disp_oimm_new,
  	.func = &nv50_disp_pioc_func,
  	.chid = 5,
  };
  