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 <core/os.h>
  #include <core/class.h>
  #include <core/engctx.h>
  
  #include <engine/software.h>
  #include <engine/disp.h>
  
  struct nvc0_software_priv {
  	struct nouveau_software base;
  };
  
  struct nvc0_software_chan {
  	struct nouveau_software_chan base;
  };
  
  /*******************************************************************************
   * software object classes
   ******************************************************************************/
  
  static int
  nvc0_software_mthd_vblsem_offset(struct nouveau_object *object, u32 mthd,
  				 void *args, u32 size)
  {
  	struct nvc0_software_chan *chan = (void *)nv_engctx(object->parent);
  	u64 data = *(u32 *)args;
  	if (mthd == 0x0400) {
  		chan->base.vblank.offset &= 0x00ffffffffULL;
  		chan->base.vblank.offset |= data << 32;
  	} else {
  		chan->base.vblank.offset &= 0xff00000000ULL;
  		chan->base.vblank.offset |= data;
  	}
  	return 0;
  }
  
  static int
  nvc0_software_mthd_vblsem_value(struct nouveau_object *object, u32 mthd,
  				void *args, u32 size)
  {
  	struct nvc0_software_chan *chan = (void *)nv_engctx(object->parent);
  	chan->base.vblank.value = *(u32 *)args;
  	return 0;
  }
  
  static int
  nvc0_software_mthd_vblsem_release(struct nouveau_object *object, u32 mthd,
  				  void *args, u32 size)
  {
  	struct nvc0_software_chan *chan = (void *)nv_engctx(object->parent);
  	struct nouveau_disp *disp = nouveau_disp(object);
  	unsigned long flags;
  	u32 crtc = *(u32 *)args;
  
  	if ((nv_device(object)->card_type < NV_E0 && crtc > 1) || crtc > 3)
  		return -EINVAL;
  
  	disp->vblank.get(disp->vblank.data, crtc);
  
  	spin_lock_irqsave(&disp->vblank.lock, flags);
  	list_add(&chan->base.vblank.head, &disp->vblank.list);
  	chan->base.vblank.crtc = crtc;
  	spin_unlock_irqrestore(&disp->vblank.lock, flags);
  	return 0;
  }
  
  static int
  nvc0_software_mthd_flip(struct nouveau_object *object, u32 mthd,
  			void *args, u32 size)
  {
  	struct nvc0_software_chan *chan = (void *)nv_engctx(object->parent);
  	if (chan->base.flip)
  		return chan->base.flip(chan->base.flip_data);
  	return -EINVAL;
  }
  
  static struct nouveau_omthds
  nvc0_software_omthds[] = {
  	{ 0x0400, nvc0_software_mthd_vblsem_offset },
  	{ 0x0404, nvc0_software_mthd_vblsem_offset },
  	{ 0x0408, nvc0_software_mthd_vblsem_value },
  	{ 0x040c, nvc0_software_mthd_vblsem_release },
  	{ 0x0500, nvc0_software_mthd_flip },
  	{}
  };
  
  static struct nouveau_oclass
  nvc0_software_sclass[] = {
  	{ 0x906e, &nouveau_object_ofuncs, nvc0_software_omthds },
  	{}
  };
  
  /*******************************************************************************
   * software context
   ******************************************************************************/
  
  static int
  nvc0_software_context_ctor(struct nouveau_object *parent,
  			   struct nouveau_object *engine,
  			   struct nouveau_oclass *oclass, void *data, u32 size,
  			   struct nouveau_object **pobject)
  {
  	struct nvc0_software_chan *chan;
  	int ret;
  
  	ret = nouveau_software_context_create(parent, engine, oclass, &chan);
  	*pobject = nv_object(chan);
  	if (ret)
  		return ret;
  
  	chan->base.vblank.channel = nv_gpuobj(parent->parent)->addr >> 12;
  	return 0;
  }
  
  static struct nouveau_oclass
  nvc0_software_cclass = {
  	.handle = NV_ENGCTX(SW, 0xc0),
  	.ofuncs = &(struct nouveau_ofuncs) {
  		.ctor = nvc0_software_context_ctor,
  		.dtor = _nouveau_software_context_dtor,
  		.init = _nouveau_software_context_init,
  		.fini = _nouveau_software_context_fini,
  	},
  };
  
  /*******************************************************************************
   * software engine/subdev functions
   ******************************************************************************/
  
  static int
  nvc0_software_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
  		   struct nouveau_oclass *oclass, void *data, u32 size,
  		   struct nouveau_object **pobject)
  {
  	struct nvc0_software_priv *priv;
  	int ret;
  
  	ret = nouveau_software_create(parent, engine, oclass, &priv);
  	*pobject = nv_object(priv);
  	if (ret)
  		return ret;
  
  	nv_engine(priv)->cclass = &nvc0_software_cclass;
  	nv_engine(priv)->sclass = nvc0_software_sclass;
  	nv_subdev(priv)->intr = nv04_software_intr;
  	return 0;
  }
  
  struct nouveau_oclass
  nvc0_software_oclass = {
  	.handle = NV_ENGINE(SW, 0xc0),
  	.ofuncs = &(struct nouveau_ofuncs) {
  		.ctor = nvc0_software_ctor,
  		.dtor = _nouveau_software_dtor,
  		.init = _nouveau_software_init,
  		.fini = _nouveau_software_fini,
  	},
  };
  