/*
 * 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 "drmP.h"

#include "nouveau_drv.h"
#include "nouveau_ramht.h"
#include "nouveau_software.h"

#include "nv50_display.h"

struct nvc0_software_priv {
	struct nouveau_software_priv base;
};

struct nvc0_software_chan {
	struct nouveau_software_chan base;
	struct nouveau_vma dispc_vma[4];
};

u64
nvc0_software_crtc(struct nouveau_channel *chan, int crtc)
{
	struct nvc0_software_chan *pch = chan->engctx[NVOBJ_ENGINE_SW];
	return pch->dispc_vma[crtc].offset;
}

static int
nvc0_software_context_new(struct nouveau_channel *chan, int engine)
{
	struct drm_device *dev = chan->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nvc0_software_priv *psw = nv_engine(dev, NVOBJ_ENGINE_SW);
	struct nvc0_software_chan *pch;
	int ret = 0, i;

	pch = kzalloc(sizeof(*pch), GFP_KERNEL);
	if (!pch)
		return -ENOMEM;

	nouveau_software_context_new(&pch->base);
	chan->engctx[engine] = pch;

	/* map display semaphore buffers into channel's vm */
	for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
		struct nouveau_bo *bo;
		if (dev_priv->card_type >= NV_D0)
			bo = nvd0_display_crtc_sema(dev, i);
		else
			bo = nv50_display(dev)->crtc[i].sem.bo;

		ret = nouveau_bo_vma_add(bo, chan->vm, &pch->dispc_vma[i]);
	}

	if (ret)
		psw->base.base.context_del(chan, engine);
	return ret;
}

static void
nvc0_software_context_del(struct nouveau_channel *chan, int engine)
{
	struct drm_device *dev = chan->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nvc0_software_chan *pch = chan->engctx[engine];
	int i;

	if (dev_priv->card_type >= NV_D0) {
		for (i = 0; i < dev->mode_config.num_crtc; i++) {
			struct nouveau_bo *bo = nvd0_display_crtc_sema(dev, i);
			nouveau_bo_vma_del(bo, &pch->dispc_vma[i]);
		}
	} else
	if (dev_priv->card_type >= NV_50) {
		struct nv50_display *disp = nv50_display(dev);
		for (i = 0; i < dev->mode_config.num_crtc; i++) {
			struct nv50_display_crtc *dispc = &disp->crtc[i];
			nouveau_bo_vma_del(dispc->sem.bo, &pch->dispc_vma[i]);
		}
	}

	chan->engctx[engine] = NULL;
	kfree(pch);
}

static int
nvc0_software_object_new(struct nouveau_channel *chan, int engine,
			 u32 handle, u16 class)
{
	return 0;
}

static int
nvc0_software_init(struct drm_device *dev, int engine)
{
	return 0;
}

static int
nvc0_software_fini(struct drm_device *dev, int engine, bool suspend)
{
	return 0;
}

static void
nvc0_software_destroy(struct drm_device *dev, int engine)
{
	struct nvc0_software_priv *psw = nv_engine(dev, engine);

	NVOBJ_ENGINE_DEL(dev, SW);
	kfree(psw);
}

int
nvc0_software_create(struct drm_device *dev)
{
	struct nvc0_software_priv *psw = kzalloc(sizeof(*psw), GFP_KERNEL);
	if (!psw)
		return -ENOMEM;

	psw->base.base.destroy = nvc0_software_destroy;
	psw->base.base.init = nvc0_software_init;
	psw->base.base.fini = nvc0_software_fini;
	psw->base.base.context_new = nvc0_software_context_new;
	psw->base.base.context_del = nvc0_software_context_del;
	psw->base.base.object_new = nvc0_software_object_new;
	nouveau_software_create(&psw->base);

	NVOBJ_ENGINE_ADD(dev, SW, &psw->base.base);
	NVOBJ_CLASS(dev, 0x906e, SW);
	return 0;
}