/*
 * 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.
 *
 */

#include "drmP.h"

#include "nouveau_drv.h"
#include "nouveau_dma.h"
#include "nouveau_abi16.h"
#include "nouveau_ramht.h"
#include "nouveau_software.h"

int
nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct drm_nouveau_getparam *getparam = data;

	switch (getparam->param) {
	case NOUVEAU_GETPARAM_CHIPSET_ID:
		getparam->value = dev_priv->chipset;
		break;
	case NOUVEAU_GETPARAM_PCI_VENDOR:
		getparam->value = dev->pci_vendor;
		break;
	case NOUVEAU_GETPARAM_PCI_DEVICE:
		getparam->value = dev->pci_device;
		break;
	case NOUVEAU_GETPARAM_BUS_TYPE:
		if (drm_pci_device_is_agp(dev))
			getparam->value = 0;
		else
		if (!pci_is_pcie(dev->pdev))
			getparam->value = 1;
		else
			getparam->value = 2;
		break;
	case NOUVEAU_GETPARAM_FB_SIZE:
		getparam->value = dev_priv->fb_available_size;
		break;
	case NOUVEAU_GETPARAM_AGP_SIZE:
		getparam->value = dev_priv->gart_info.aper_size;
		break;
	case NOUVEAU_GETPARAM_VM_VRAM_BASE:
		getparam->value = 0; /* deprecated */
		break;
	case NOUVEAU_GETPARAM_PTIMER_TIME:
		getparam->value = dev_priv->engine.timer.read(dev);
		break;
	case NOUVEAU_GETPARAM_HAS_BO_USAGE:
		getparam->value = 1;
		break;
	case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
		getparam->value = 1;
		break;
	case NOUVEAU_GETPARAM_GRAPH_UNITS:
		/* NV40 and NV50 versions are quite different, but register
		 * address is the same. User is supposed to know the card
		 * family anyway... */
		if (dev_priv->chipset >= 0x40) {
			getparam->value = nv_rd32(dev, NV40_PMC_GRAPH_UNITS);
			break;
		}
		/* FALLTHRU */
	default:
		NV_DEBUG(dev, "unknown parameter %lld\n", getparam->param);
		return -EINVAL;
	}

	return 0;
}

int
nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
{
	return -EINVAL;
}

int
nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct drm_nouveau_channel_alloc *init = data;
	struct nouveau_channel *chan;
	int ret;

	if (!dev_priv->eng[NVOBJ_ENGINE_GR])
		return -ENODEV;

	if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
		return -EINVAL;

	ret = nouveau_channel_alloc(dev, &chan, file_priv,
				    init->fb_ctxdma_handle,
				    init->tt_ctxdma_handle);
	if (ret)
		return ret;
	init->channel  = chan->id;

	if (nouveau_vram_pushbuf == 0) {
		if (chan->dma.ib_max)
			init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
						NOUVEAU_GEM_DOMAIN_GART;
		else if (chan->pushbuf_bo->bo.mem.mem_type == TTM_PL_VRAM)
			init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
		else
			init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
	} else {
		init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
	}

	if (dev_priv->card_type < NV_C0) {
		init->subchan[0].handle = 0x00000000;
		init->subchan[0].grclass = 0x0000;
		init->subchan[1].handle = NvSw;
		init->subchan[1].grclass = NV_SW;
		init->nr_subchan = 2;
	}

	/* Named memory object area */
	ret = drm_gem_handle_create(file_priv, chan->notifier_bo->gem,
				    &init->notifier_handle);

	if (ret == 0)
		atomic_inc(&chan->users); /* userspace reference */
	nouveau_channel_put(&chan);
	return ret;
}

int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_channel_free *req = data;
	struct nouveau_channel *chan;

	chan = nouveau_channel_get(file_priv, req->channel);
	if (IS_ERR(chan))
		return PTR_ERR(chan);

	list_del(&chan->list);
	atomic_dec(&chan->users);
	nouveau_channel_put(&chan);
	return 0;
}

int
nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_grobj_alloc *init = data;
	struct nouveau_channel *chan;
	int ret;

	if (init->handle == ~0)
		return -EINVAL;

	/* compatibility with userspace that assumes 506e for all chipsets */
	if (init->class == 0x506e) {
		init->class = nouveau_software_class(dev);
		if (init->class == 0x906e)
			return 0;
	} else
	if (init->class == 0x906e) {
		NV_DEBUG(dev, "906e not supported yet\n");
		return -EINVAL;
	}

	chan = nouveau_channel_get(file_priv, init->channel);
	if (IS_ERR(chan))
		return PTR_ERR(chan);

	if (nouveau_ramht_find(chan, init->handle)) {
		ret = -EEXIST;
		goto out;
	}

	ret = nouveau_gpuobj_gr_new(chan, init->handle, init->class);
	if (ret) {
		NV_ERROR(dev, "Error creating object: %d (%d/0x%08x)\n",
			 ret, init->channel, init->handle);
	}

out:
	nouveau_channel_put(&chan);
	return ret;
}

int
nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct drm_nouveau_notifierobj_alloc *na = data;
	struct nouveau_channel *chan;
	int ret;

	/* completely unnecessary for these chipsets... */
	if (unlikely(dev_priv->card_type >= NV_C0))
		return -EINVAL;

	chan = nouveau_channel_get(file_priv, na->channel);
	if (IS_ERR(chan))
		return PTR_ERR(chan);

	ret = nouveau_notifier_alloc(chan, na->handle, na->size, 0, 0x1000,
				     &na->offset);
	nouveau_channel_put(&chan);
	return ret;
}

int
nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
{
	struct drm_nouveau_gpuobj_free *objfree = data;
	struct nouveau_channel *chan;
	int ret;

	chan = nouveau_channel_get(file_priv, objfree->channel);
	if (IS_ERR(chan))
		return PTR_ERR(chan);

	/* Synchronize with the user channel */
	nouveau_channel_idle(chan);

	ret = nouveau_ramht_remove(chan, objfree->handle);
	nouveau_channel_put(&chan);
	return ret;
}