/*
 * 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 <core/event.h>

#include <subdev/bar.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);
	u32 crtc = *(u32 *)args;

	if ((nv_device(object)->card_type < NV_E0 && crtc > 1) || crtc > 3)
		return -EINVAL;

	nouveau_event_get(disp->vblank, crtc, &chan->base.vblank.event);
	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 int
nvc0_software_mthd_mp_control(struct nouveau_object *object, u32 mthd,
                              void *args, u32 size)
{
	struct nvc0_software_chan *chan = (void *)nv_engctx(object->parent);
	struct nvc0_software_priv *priv = (void *)nv_object(chan)->engine;
	u32 data = *(u32 *)args;

	switch (mthd) {
	case 0x600:
		nv_wr32(priv, 0x419e00, data); /* MP.PM_UNK000 */
		break;
	case 0x644:
		if (data & ~0x1ffffe)
			return -EINVAL;
		nv_wr32(priv, 0x419e44, data); /* MP.TRAP_WARP_ERROR_EN */
		break;
	case 0x6ac:
		nv_wr32(priv, 0x419eac, data); /* MP.PM_UNK0AC */
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static struct nouveau_omthds
nvc0_software_omthds[] = {
	{ 0x0400, 0x0400, nvc0_software_mthd_vblsem_offset },
	{ 0x0404, 0x0404, nvc0_software_mthd_vblsem_offset },
	{ 0x0408, 0x0408, nvc0_software_mthd_vblsem_value },
	{ 0x040c, 0x040c, nvc0_software_mthd_vblsem_release },
	{ 0x0500, 0x0500, nvc0_software_mthd_flip },
	{ 0x0600, 0x0600, nvc0_software_mthd_mp_control },
	{ 0x0644, 0x0644, nvc0_software_mthd_mp_control },
	{ 0x06ac, 0x06ac, nvc0_software_mthd_mp_control },
	{}
};

static struct nouveau_oclass
nvc0_software_sclass[] = {
	{ 0x906e, &nouveau_object_ofuncs, nvc0_software_omthds },
	{}
};

/*******************************************************************************
 * software context
 ******************************************************************************/

static int
nvc0_software_vblsem_release(struct nouveau_eventh *event, int head)
{
	struct nouveau_software_chan *chan =
		container_of(event, struct nouveau_software_chan, vblank.event);
	struct nvc0_software_priv *priv = (void *)nv_object(chan)->engine;
	struct nouveau_bar *bar = nouveau_bar(priv);

	nv_wr32(priv, 0x001718, 0x80000000 | chan->vblank.channel);
	bar->flush(bar);
	nv_wr32(priv, 0x06000c, upper_32_bits(chan->vblank.offset));
	nv_wr32(priv, 0x060010, lower_32_bits(chan->vblank.offset));
	nv_wr32(priv, 0x060014, chan->vblank.value);

	return NVKM_EVENT_DROP;
}

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;
	chan->base.vblank.event.func = nvc0_software_vblsem_release;
	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,
	},
};