text: #ifndef __NV50_KMS_H__
  #define __NV50_KMS_H__
  #include <nvif/mem.h>
  
  #include "nouveau_display.h"
  
  struct nv50_disp {
  	struct nvif_disp *disp;
  	struct nv50_core *core;
  
  #define NV50_DISP_SYNC(c, o)                                ((c) * 0x040 + (o))
  #define NV50_DISP_CORE_NTFY                       NV50_DISP_SYNC(0      , 0x00)
  #define NV50_DISP_WNDW_SEM0(c)                    NV50_DISP_SYNC(1 + (c), 0x00)
  #define NV50_DISP_WNDW_SEM1(c)                    NV50_DISP_SYNC(1 + (c), 0x10)
  #define NV50_DISP_WNDW_NTFY(c)                    NV50_DISP_SYNC(1 + (c), 0x20)
  #define NV50_DISP_BASE_SEM0(c)                    NV50_DISP_WNDW_SEM0(0 + (c))
  #define NV50_DISP_BASE_SEM1(c)                    NV50_DISP_WNDW_SEM1(0 + (c))
  #define NV50_DISP_BASE_NTFY(c)                    NV50_DISP_WNDW_NTFY(0 + (c))
  #define NV50_DISP_OVLY_SEM0(c)                    NV50_DISP_WNDW_SEM0(4 + (c))
  #define NV50_DISP_OVLY_SEM1(c)                    NV50_DISP_WNDW_SEM1(4 + (c))
  #define NV50_DISP_OVLY_NTFY(c)                    NV50_DISP_WNDW_NTFY(4 + (c))
  	struct nouveau_bo *sync;
  
  	struct mutex mutex;
  };
  
  static inline struct nv50_disp *
  nv50_disp(struct drm_device *dev)
  {
  	return nouveau_display(dev)->priv;
  }
  
  struct nv50_disp_interlock {
  	enum nv50_disp_interlock_type {
  		NV50_DISP_INTERLOCK_CORE = 0,
  		NV50_DISP_INTERLOCK_CURS,
  		NV50_DISP_INTERLOCK_BASE,
  		NV50_DISP_INTERLOCK_OVLY,
  		NV50_DISP_INTERLOCK_WNDW,
  		NV50_DISP_INTERLOCK_WIMM,
  		NV50_DISP_INTERLOCK__SIZE
  	} type;
  	u32 data;
  	u32 wimm;
  };
  
  void corec37d_ntfy_init(struct nouveau_bo *, u32);
  
  struct nv50_chan {
  	struct nvif_object user;
  	struct nvif_device *device;
  };
  
  struct nv50_dmac {
  	struct nv50_chan base;
  
  	struct nvif_mem push;
  	u32 *ptr;
  
  	struct nvif_object sync;
  	struct nvif_object vram;
  
  	/* Protects against concurrent pushbuf access to this channel, lock is
  	 * grabbed by evo_wait (if the pushbuf reservation is successful) and
  	 * dropped again by evo_kick. */
  	struct mutex lock;
  };
  
  int nv50_dmac_create(struct nvif_device *device, struct nvif_object *disp,
  		     const s32 *oclass, u8 head, void *data, u32 size,
  		     u64 syncbuf, struct nv50_dmac *dmac);
  void nv50_dmac_destroy(struct nv50_dmac *);
  
  u32 *evo_wait(struct nv50_dmac *, int nr);
  void evo_kick(u32 *, struct nv50_dmac *);
  
  #define evo_mthd(p, m, s) do {						\
  	const u32 _m = (m), _s = (s);					\
  	if (drm_debug & DRM_UT_KMS)					\
  		pr_err("%04x %d %s\n", _m, _s, __func__);		\
  	*((p)++) = ((_s << 18) | _m);					\
  } while(0)
  
  #define evo_data(p, d) do {						\
  	const u32 _d = (d);						\
  	if (drm_debug & DRM_UT_KMS)					\
  		pr_err("\t%08x\n", _d);					\
  	*((p)++) = _d;							\
  } while(0)
  #endif
  