drivers/gpu/drm/nouveau/nve0_fifo.c - linux - Git at Google

 /*
  * Copyright 2010 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 <drm/drmP.h>

 #include "nouveau_drv.h"
 #include "nouveau_mm.h"
 #include "nouveau_fifo.h"

 #define NVE0_FIFO_ENGINE_NUM 32

 static void nve0_fifo_isr(struct drm_device *);

 struct nve0_fifo_engine {
 	struct nouveau_gpuobj *playlist[2];
 	int cur_playlist;
 };

 struct nve0_fifo_priv {
 	struct nouveau_fifo_priv base;
 	struct nve0_fifo_engine engine[NVE0_FIFO_ENGINE_NUM];
 	struct {
 		struct nouveau_gpuobj *mem;
 		struct nouveau_vma bar;
 	} user;
 	int spoon_nr;
 };

 struct nve0_fifo_chan {
 	struct nouveau_fifo_chan base;
 	u32 engine;
 };

 static void
 nve0_fifo_playlist_update(struct drm_device *dev, u32 engine)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
 	struct nve0_fifo_priv *priv = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 	struct nve0_fifo_engine *peng = &priv->engine[engine];
 	struct nouveau_gpuobj *cur;
 	u32 match = (engine << 16) | 0x00000001;
 	int ret, i, p;

 	cur = peng->playlist[peng->cur_playlist];
 	if (unlikely(cur == NULL)) {
 		ret = nouveau_gpuobj_new(dev, NULL, 0x8000, 0x1000, 0, &cur);
 		if (ret) {
 			NV_ERROR(dev, "PFIFO: playlist alloc failed\n");
 			return;
 		}

 		peng->playlist[peng->cur_playlist] = cur;
 	}

 	peng->cur_playlist = !peng->cur_playlist;

 	for (i = 0, p = 0; i < priv->base.channels; i++) {
 		u32 ctrl = nv_rd32(dev, 0x800004 + (i * 8)) & 0x001f0001;
 		if (ctrl != match)
 			continue;
 		nv_wo32(cur, p + 0, i);
 		nv_wo32(cur, p + 4, 0x00000000);
 		p += 8;
 	}
 	pinstmem->flush(dev);

 	nv_wr32(dev, 0x002270, cur->vinst >> 12);
 	nv_wr32(dev, 0x002274, (engine << 20) | (p >> 3));
 	if (!nv_wait(dev, 0x002284 + (engine * 4), 0x00100000, 0x00000000))
 		NV_ERROR(dev, "PFIFO: playlist %d update timeout\n", engine);
 }

 static int
 nve0_fifo_context_new(struct nouveau_channel *chan, int engine)
 {
 	struct drm_device *dev = chan->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
 	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
 	struct nve0_fifo_chan *fctx;
 	u64 usermem = priv->user.mem->vinst + chan->id * 512;
 	u64 ib_virt = chan->pushbuf_base + chan->dma.ib_base * 4;
 	int ret = 0, i;

 	fctx = chan->engctx[engine] = kzalloc(sizeof(*fctx), GFP_KERNEL);
 	if (!fctx)
 		return -ENOMEM;

 	fctx->engine = 0; /* PGRAPH */

 	/* allocate vram for control regs, map into polling area */
 	chan->user = ioremap_wc(pci_resource_start(dev->pdev, 1) +
 				priv->user.bar.offset + (chan->id * 512), 512);
 	if (!chan->user) {
 		ret = -ENOMEM;
 		goto error;
 	}

 	for (i = 0; i < 0x100; i += 4)
 		nv_wo32(chan->ramin, i, 0x00000000);
 	nv_wo32(chan->ramin, 0x08, lower_32_bits(usermem));
 	nv_wo32(chan->ramin, 0x0c, upper_32_bits(usermem));
 	nv_wo32(chan->ramin, 0x10, 0x0000face);
 	nv_wo32(chan->ramin, 0x30, 0xfffff902);
 	nv_wo32(chan->ramin, 0x48, lower_32_bits(ib_virt));
 	nv_wo32(chan->ramin, 0x4c, drm_order(chan->dma.ib_max + 1) << 16 |
 				     upper_32_bits(ib_virt));
 	nv_wo32(chan->ramin, 0x84, 0x20400000);
 	nv_wo32(chan->ramin, 0x94, 0x30000001);
 	nv_wo32(chan->ramin, 0x9c, 0x00000100);
 	nv_wo32(chan->ramin, 0xac, 0x0000001f);
 	nv_wo32(chan->ramin, 0xe4, 0x00000000);
 	nv_wo32(chan->ramin, 0xe8, chan->id);
 	nv_wo32(chan->ramin, 0xf8, 0x10003080); /* 0x002310 */
 	nv_wo32(chan->ramin, 0xfc, 0x10000010); /* 0x002350 */
 	pinstmem->flush(dev);

 	nv_wr32(dev, 0x800000 + (chan->id * 8), 0x80000000 |
 						(chan->ramin->vinst >> 12));
 	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000400, 0x00000400);
 	nve0_fifo_playlist_update(dev, fctx->engine);
 	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000400, 0x00000400);

 error:
 	if (ret)
 		priv->base.base.context_del(chan, engine);
 	return ret;
 }

 static void
 nve0_fifo_context_del(struct nouveau_channel *chan, int engine)
 {
 	struct nve0_fifo_chan *fctx = chan->engctx[engine];
 	struct drm_device *dev = chan->dev;

 	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000800, 0x00000800);
 	nv_wr32(dev, 0x002634, chan->id);
 	if (!nv_wait(dev, 0x0002634, 0xffffffff, chan->id))
 		NV_WARN(dev, "0x2634 != chid: 0x%08x\n", nv_rd32(dev, 0x2634));
 	nve0_fifo_playlist_update(dev, fctx->engine);
 	nv_wr32(dev, 0x800000 + (chan->id * 8), 0x00000000);

 	if (chan->user) {
 		iounmap(chan->user);
 		chan->user = NULL;
 	}

 	chan->engctx[NVOBJ_ENGINE_FIFO] = NULL;
 	kfree(fctx);
 }

 static int
 nve0_fifo_init(struct drm_device *dev, int engine)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
 	struct nve0_fifo_chan *fctx;
 	int i;

 	/* reset PFIFO, enable all available PSUBFIFO areas */
 	nv_mask(dev, 0x000200, 0x00000100, 0x00000000);
 	nv_mask(dev, 0x000200, 0x00000100, 0x00000100);
 	nv_wr32(dev, 0x000204, 0xffffffff);

 	priv->spoon_nr = hweight32(nv_rd32(dev, 0x000204));
 	NV_DEBUG(dev, "PFIFO: %d subfifo(s)\n", priv->spoon_nr);

 	/* PSUBFIFO[n] */
 	for (i = 0; i < priv->spoon_nr; i++) {
 		nv_mask(dev, 0x04013c + (i * 0x2000), 0x10000100, 0x00000000);
 		nv_wr32(dev, 0x040108 + (i * 0x2000), 0xffffffff); /* INTR */
 		nv_wr32(dev, 0x04010c + (i * 0x2000), 0xfffffeff); /* INTR_EN */
 	}

 	nv_wr32(dev, 0x002254, 0x10000000 | priv->user.bar.offset >> 12);

 	nv_wr32(dev, 0x002a00, 0xffffffff);
 	nv_wr32(dev, 0x002100, 0xffffffff);
 	nv_wr32(dev, 0x002140, 0xbfffffff);

 	/* restore PFIFO context table */
 	for (i = 0; i < priv->base.channels; i++) {
 		struct nouveau_channel *chan = dev_priv->channels.ptr[i];
 		if (!chan || !(fctx = chan->engctx[engine]))
 			continue;

 		nv_wr32(dev, 0x800000 + (i * 8), 0x80000000 |
 						 (chan->ramin->vinst >> 12));
 		nv_mask(dev, 0x800004 + (i * 8), 0x00000400, 0x00000400);
 		nve0_fifo_playlist_update(dev, fctx->engine);
 		nv_mask(dev, 0x800004 + (i * 8), 0x00000400, 0x00000400);
 	}

 	return 0;
 }

 static int
 nve0_fifo_fini(struct drm_device *dev, int engine, bool suspend)
 {
 	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
 	int i;

 	for (i = 0; i < priv->base.channels; i++) {
 		if (!(nv_rd32(dev, 0x800004 + (i * 8)) & 1))
 			continue;

 		nv_mask(dev, 0x800004 + (i * 8), 0x00000800, 0x00000800);
 		nv_wr32(dev, 0x002634, i);
 		if (!nv_wait(dev, 0x002634, 0xffffffff, i)) {
 			NV_INFO(dev, "PFIFO: kick ch %d failed: 0x%08x\n",
 				i, nv_rd32(dev, 0x002634));
 			return -EBUSY;
 		}
 	}

 	nv_wr32(dev, 0x002140, 0x00000000);
 	return 0;
 }

 struct nouveau_enum nve0_fifo_fault_unit[] = {
 	{}
 };

 struct nouveau_enum nve0_fifo_fault_reason[] = {
 	{ 0x00, "PT_NOT_PRESENT" },
 	{ 0x01, "PT_TOO_SHORT" },
 	{ 0x02, "PAGE_NOT_PRESENT" },
 	{ 0x03, "VM_LIMIT_EXCEEDED" },
 	{ 0x04, "NO_CHANNEL" },
 	{ 0x05, "PAGE_SYSTEM_ONLY" },
 	{ 0x06, "PAGE_READ_ONLY" },
 	{ 0x0a, "COMPRESSED_SYSRAM" },
 	{ 0x0c, "INVALID_STORAGE_TYPE" },
 	{}
 };

 struct nouveau_enum nve0_fifo_fault_hubclient[] = {
 	{}
 };

 struct nouveau_enum nve0_fifo_fault_gpcclient[] = {
 	{}
 };

 struct nouveau_bitfield nve0_fifo_subfifo_intr[] = {
 	{ 0x00200000, "ILLEGAL_MTHD" },
 	{ 0x00800000, "EMPTY_SUBC" },
 	{}
 };

 static void
 nve0_fifo_isr_vm_fault(struct drm_device *dev, int unit)
 {
 	u32 inst = nv_rd32(dev, 0x2800 + (unit * 0x10));
 	u32 valo = nv_rd32(dev, 0x2804 + (unit * 0x10));
 	u32 vahi = nv_rd32(dev, 0x2808 + (unit * 0x10));
 	u32 stat = nv_rd32(dev, 0x280c + (unit * 0x10));
 	u32 client = (stat & 0x00001f00) >> 8;

 	NV_INFO(dev, "PFIFO: %s fault at 0x%010llx [",
 		(stat & 0x00000080) ? "write" : "read", (u64)vahi << 32 | valo);
 	nouveau_enum_print(nve0_fifo_fault_reason, stat & 0x0000000f);
 	printk("] from ");
 	nouveau_enum_print(nve0_fifo_fault_unit, unit);
 	if (stat & 0x00000040) {
 		printk("/");
 		nouveau_enum_print(nve0_fifo_fault_hubclient, client);
 	} else {
 		printk("/GPC%d/", (stat & 0x1f000000) >> 24);
 		nouveau_enum_print(nve0_fifo_fault_gpcclient, client);
 	}
 	printk(" on channel 0x%010llx\n", (u64)inst << 12);
 }

 static int
 nve0_fifo_page_flip(struct drm_device *dev, u32 chid)
 {
 	struct nve0_fifo_priv *priv = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_channel *chan = NULL;
 	unsigned long flags;
 	int ret = -EINVAL;

 	spin_lock_irqsave(&dev_priv->channels.lock, flags);
 	if (likely(chid >= 0 && chid < priv->base.channels)) {
 		chan = dev_priv->channels.ptr[chid];
 		if (likely(chan))
 			ret = nouveau_finish_page_flip(chan, NULL);
 	}
 	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 	return ret;
 }

 static void
 nve0_fifo_isr_subfifo_intr(struct drm_device *dev, int unit)
 {
 	u32 stat = nv_rd32(dev, 0x040108 + (unit * 0x2000));
 	u32 addr = nv_rd32(dev, 0x0400c0 + (unit * 0x2000));
 	u32 data = nv_rd32(dev, 0x0400c4 + (unit * 0x2000));
 	u32 chid = nv_rd32(dev, 0x040120 + (unit * 0x2000)) & 0x7f;
 	u32 subc = (addr & 0x00070000);
 	u32 mthd = (addr & 0x00003ffc);
 	u32 show = stat;

 	if (stat & 0x00200000) {
 		if (mthd == 0x0054) {
 			if (!nve0_fifo_page_flip(dev, chid))
 				show &= ~0x00200000;
 		}
 	}

 	if (show) {
 		NV_INFO(dev, "PFIFO%d:", unit);
 		nouveau_bitfield_print(nve0_fifo_subfifo_intr, show);
 		NV_INFO(dev, "PFIFO%d: ch %d subc %d mthd 0x%04x data 0x%08x\n",
 			unit, chid, subc, mthd, data);
 	}

 	nv_wr32(dev, 0x0400c0 + (unit * 0x2000), 0x80600008);
 	nv_wr32(dev, 0x040108 + (unit * 0x2000), stat);
 }

 static void
 nve0_fifo_isr(struct drm_device *dev)
 {
 	u32 mask = nv_rd32(dev, 0x002140);
 	u32 stat = nv_rd32(dev, 0x002100) & mask;

 	if (stat & 0x00000100) {
 		NV_INFO(dev, "PFIFO: unknown status 0x00000100\n");
 		nv_wr32(dev, 0x002100, 0x00000100);
 		stat &= ~0x00000100;
 	}

 	if (stat & 0x10000000) {
 		u32 units = nv_rd32(dev, 0x00259c);
 		u32 u = units;

 		while (u) {
 			int i = ffs(u) - 1;
 			nve0_fifo_isr_vm_fault(dev, i);
 			u &= ~(1 << i);
 		}

 		nv_wr32(dev, 0x00259c, units);
 		stat &= ~0x10000000;
 	}

 	if (stat & 0x20000000) {
 		u32 units = nv_rd32(dev, 0x0025a0);
 		u32 u = units;

 		while (u) {
 			int i = ffs(u) - 1;
 			nve0_fifo_isr_subfifo_intr(dev, i);
 			u &= ~(1 << i);
 		}

 		nv_wr32(dev, 0x0025a0, units);
 		stat &= ~0x20000000;
 	}

 	if (stat & 0x40000000) {
 		NV_INFO(dev, "PFIFO: unknown status 0x40000000\n");
 		nv_mask(dev, 0x002a00, 0x00000000, 0x00000000);
 		stat &= ~0x40000000;
 	}

 	if (stat) {
 		NV_INFO(dev, "PFIFO: unhandled status 0x%08x\n", stat);
 		nv_wr32(dev, 0x002100, stat);
 		nv_wr32(dev, 0x002140, 0);
 	}
 }

 static void
 nve0_fifo_destroy(struct drm_device *dev, int engine)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
 	int i;

 	nouveau_vm_put(&priv->user.bar);
 	nouveau_gpuobj_ref(NULL, &priv->user.mem);

 	for (i = 0; i < NVE0_FIFO_ENGINE_NUM; i++) {
 		nouveau_gpuobj_ref(NULL, &priv->engine[i].playlist[0]);
 		nouveau_gpuobj_ref(NULL, &priv->engine[i].playlist[1]);
 	}

 	dev_priv->eng[engine] = NULL;
 	kfree(priv);
 }

 int
 nve0_fifo_create(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nve0_fifo_priv *priv;
 	int ret;

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

 	priv->base.base.destroy = nve0_fifo_destroy;
 	priv->base.base.init = nve0_fifo_init;
 	priv->base.base.fini = nve0_fifo_fini;
 	priv->base.base.context_new = nve0_fifo_context_new;
 	priv->base.base.context_del = nve0_fifo_context_del;
 	priv->base.channels = 4096;
 	dev_priv->eng[NVOBJ_ENGINE_FIFO] = &priv->base.base;

 	ret = nouveau_gpuobj_new(dev, NULL, priv->base.channels * 512, 0x1000,
 				 NVOBJ_FLAG_ZERO_ALLOC, &priv->user.mem);
 	if (ret)
 		goto error;

 	ret = nouveau_vm_get(dev_priv->bar1_vm, priv->user.mem->size,
 			     12, NV_MEM_ACCESS_RW, &priv->user.bar);
 	if (ret)
 		goto error;

 	nouveau_vm_map(&priv->user.bar, *(struct nouveau_mem **)priv->user.mem->node);

 	nouveau_irq_register(dev, 8, nve0_fifo_isr);
 error:
 	if (ret)
 		priv->base.base.destroy(dev, NVOBJ_ENGINE_FIFO);
 	return ret;
 }
	/*
	* Copyright 2010 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 <drm/drmP.h>

	#include "nouveau_drv.h"
	#include "nouveau_mm.h"
	#include "nouveau_fifo.h"

	#define NVE0_FIFO_ENGINE_NUM 32

	static void nve0_fifo_isr(struct drm_device *);

	struct nve0_fifo_engine {
	struct nouveau_gpuobj *playlist[2];
	int cur_playlist;
	};

	struct nve0_fifo_priv {
	struct nouveau_fifo_priv base;
	struct nve0_fifo_engine engine[NVE0_FIFO_ENGINE_NUM];
	struct {
	struct nouveau_gpuobj *mem;
	struct nouveau_vma bar;
	} user;
	int spoon_nr;
	};

	struct nve0_fifo_chan {
	struct nouveau_fifo_chan base;
	u32 engine;
	};

	static void
	nve0_fifo_playlist_update(struct drm_device *dev, u32 engine)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
	struct nve0_fifo_priv *priv = nv_engine(dev, NVOBJ_ENGINE_FIFO);
	struct nve0_fifo_engine *peng = &priv->engine[engine];
	struct nouveau_gpuobj *cur;
	u32 match = (engine << 16) \| 0x00000001;
	int ret, i, p;

	cur = peng->playlist[peng->cur_playlist];
	if (unlikely(cur == NULL)) {
	ret = nouveau_gpuobj_new(dev, NULL, 0x8000, 0x1000, 0, &cur);
	if (ret) {
	NV_ERROR(dev, "PFIFO: playlist alloc failed\n");
	return;
	}

	peng->playlist[peng->cur_playlist] = cur;
	}

	peng->cur_playlist = !peng->cur_playlist;

	for (i = 0, p = 0; i < priv->base.channels; i++) {
	u32 ctrl = nv_rd32(dev, 0x800004 + (i * 8)) & 0x001f0001;
	if (ctrl != match)
	continue;
	nv_wo32(cur, p + 0, i);
	nv_wo32(cur, p + 4, 0x00000000);
	p += 8;
	}
	pinstmem->flush(dev);

	nv_wr32(dev, 0x002270, cur->vinst >> 12);
	nv_wr32(dev, 0x002274, (engine << 20) \| (p >> 3));
	if (!nv_wait(dev, 0x002284 + (engine * 4), 0x00100000, 0x00000000))
	NV_ERROR(dev, "PFIFO: playlist %d update timeout\n", engine);
	}

	static int
	nve0_fifo_context_new(struct nouveau_channel *chan, int engine)
	{
	struct drm_device *dev = chan->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
	struct nve0_fifo_chan *fctx;
	u64 usermem = priv->user.mem->vinst + chan->id * 512;
	u64 ib_virt = chan->pushbuf_base + chan->dma.ib_base * 4;
	int ret = 0, i;

	fctx = chan->engctx[engine] = kzalloc(sizeof(*fctx), GFP_KERNEL);
	if (!fctx)
	return -ENOMEM;

	fctx->engine = 0; /* PGRAPH */

	/* allocate vram for control regs, map into polling area */
	chan->user = ioremap_wc(pci_resource_start(dev->pdev, 1) +
	priv->user.bar.offset + (chan->id * 512), 512);
	if (!chan->user) {
	ret = -ENOMEM;
	goto error;
	}

	for (i = 0; i < 0x100; i += 4)
	nv_wo32(chan->ramin, i, 0x00000000);
	nv_wo32(chan->ramin, 0x08, lower_32_bits(usermem));
	nv_wo32(chan->ramin, 0x0c, upper_32_bits(usermem));
	nv_wo32(chan->ramin, 0x10, 0x0000face);
	nv_wo32(chan->ramin, 0x30, 0xfffff902);
	nv_wo32(chan->ramin, 0x48, lower_32_bits(ib_virt));
	nv_wo32(chan->ramin, 0x4c, drm_order(chan->dma.ib_max + 1) << 16 \|
	upper_32_bits(ib_virt));
	nv_wo32(chan->ramin, 0x84, 0x20400000);
	nv_wo32(chan->ramin, 0x94, 0x30000001);
	nv_wo32(chan->ramin, 0x9c, 0x00000100);
	nv_wo32(chan->ramin, 0xac, 0x0000001f);
	nv_wo32(chan->ramin, 0xe4, 0x00000000);
	nv_wo32(chan->ramin, 0xe8, chan->id);
	nv_wo32(chan->ramin, 0xf8, 0x10003080); /* 0x002310 */
	nv_wo32(chan->ramin, 0xfc, 0x10000010); /* 0x002350 */
	pinstmem->flush(dev);

	nv_wr32(dev, 0x800000 + (chan->id * 8), 0x80000000 \|
	(chan->ramin->vinst >> 12));
	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000400, 0x00000400);
	nve0_fifo_playlist_update(dev, fctx->engine);
	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000400, 0x00000400);

	error:
	if (ret)
	priv->base.base.context_del(chan, engine);
	return ret;
	}

	static void
	nve0_fifo_context_del(struct nouveau_channel *chan, int engine)
	{
	struct nve0_fifo_chan *fctx = chan->engctx[engine];
	struct drm_device *dev = chan->dev;

	nv_mask(dev, 0x800004 + (chan->id * 8), 0x00000800, 0x00000800);
	nv_wr32(dev, 0x002634, chan->id);
	if (!nv_wait(dev, 0x0002634, 0xffffffff, chan->id))
	NV_WARN(dev, "0x2634 != chid: 0x%08x\n", nv_rd32(dev, 0x2634));
	nve0_fifo_playlist_update(dev, fctx->engine);
	nv_wr32(dev, 0x800000 + (chan->id * 8), 0x00000000);

	if (chan->user) {
	iounmap(chan->user);
	chan->user = NULL;
	}

	chan->engctx[NVOBJ_ENGINE_FIFO] = NULL;
	kfree(fctx);
	}

	static int
	nve0_fifo_init(struct drm_device *dev, int engine)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
	struct nve0_fifo_chan *fctx;
	int i;

	/* reset PFIFO, enable all available PSUBFIFO areas */
	nv_mask(dev, 0x000200, 0x00000100, 0x00000000);
	nv_mask(dev, 0x000200, 0x00000100, 0x00000100);
	nv_wr32(dev, 0x000204, 0xffffffff);

	priv->spoon_nr = hweight32(nv_rd32(dev, 0x000204));
	NV_DEBUG(dev, "PFIFO: %d subfifo(s)\n", priv->spoon_nr);

	/* PSUBFIFO[n] */
	for (i = 0; i < priv->spoon_nr; i++) {
	nv_mask(dev, 0x04013c + (i * 0x2000), 0x10000100, 0x00000000);
	nv_wr32(dev, 0x040108 + (i * 0x2000), 0xffffffff); /* INTR */
	nv_wr32(dev, 0x04010c + (i * 0x2000), 0xfffffeff); /* INTR_EN */
	}

	nv_wr32(dev, 0x002254, 0x10000000 \| priv->user.bar.offset >> 12);

	nv_wr32(dev, 0x002a00, 0xffffffff);
	nv_wr32(dev, 0x002100, 0xffffffff);
	nv_wr32(dev, 0x002140, 0xbfffffff);

	/* restore PFIFO context table */
	for (i = 0; i < priv->base.channels; i++) {
	struct nouveau_channel *chan = dev_priv->channels.ptr[i];
	if (!chan \|\| !(fctx = chan->engctx[engine]))
	continue;

	nv_wr32(dev, 0x800000 + (i * 8), 0x80000000 \|
	(chan->ramin->vinst >> 12));
	nv_mask(dev, 0x800004 + (i * 8), 0x00000400, 0x00000400);
	nve0_fifo_playlist_update(dev, fctx->engine);
	nv_mask(dev, 0x800004 + (i * 8), 0x00000400, 0x00000400);
	}

	return 0;
	}

	static int
	nve0_fifo_fini(struct drm_device *dev, int engine, bool suspend)
	{
	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
	int i;

	for (i = 0; i < priv->base.channels; i++) {
	if (!(nv_rd32(dev, 0x800004 + (i * 8)) & 1))
	continue;

	nv_mask(dev, 0x800004 + (i * 8), 0x00000800, 0x00000800);
	nv_wr32(dev, 0x002634, i);
	if (!nv_wait(dev, 0x002634, 0xffffffff, i)) {
	NV_INFO(dev, "PFIFO: kick ch %d failed: 0x%08x\n",
	i, nv_rd32(dev, 0x002634));
	return -EBUSY;
	}
	}

	nv_wr32(dev, 0x002140, 0x00000000);
	return 0;
	}

	struct nouveau_enum nve0_fifo_fault_unit[] = {
	{}
	};

	struct nouveau_enum nve0_fifo_fault_reason[] = {
	{ 0x00, "PT_NOT_PRESENT" },
	{ 0x01, "PT_TOO_SHORT" },
	{ 0x02, "PAGE_NOT_PRESENT" },
	{ 0x03, "VM_LIMIT_EXCEEDED" },
	{ 0x04, "NO_CHANNEL" },
	{ 0x05, "PAGE_SYSTEM_ONLY" },
	{ 0x06, "PAGE_READ_ONLY" },
	{ 0x0a, "COMPRESSED_SYSRAM" },
	{ 0x0c, "INVALID_STORAGE_TYPE" },
	{}
	};

	struct nouveau_enum nve0_fifo_fault_hubclient[] = {
	{}
	};

	struct nouveau_enum nve0_fifo_fault_gpcclient[] = {
	{}
	};

	struct nouveau_bitfield nve0_fifo_subfifo_intr[] = {
	{ 0x00200000, "ILLEGAL_MTHD" },
	{ 0x00800000, "EMPTY_SUBC" },
	{}
	};

	static void
	nve0_fifo_isr_vm_fault(struct drm_device *dev, int unit)
	{
	u32 inst = nv_rd32(dev, 0x2800 + (unit * 0x10));
	u32 valo = nv_rd32(dev, 0x2804 + (unit * 0x10));
	u32 vahi = nv_rd32(dev, 0x2808 + (unit * 0x10));
	u32 stat = nv_rd32(dev, 0x280c + (unit * 0x10));
	u32 client = (stat & 0x00001f00) >> 8;

	NV_INFO(dev, "PFIFO: %s fault at 0x%010llx [",
	(stat & 0x00000080) ? "write" : "read", (u64)vahi << 32 \| valo);
	nouveau_enum_print(nve0_fifo_fault_reason, stat & 0x0000000f);
	printk("] from ");
	nouveau_enum_print(nve0_fifo_fault_unit, unit);
	if (stat & 0x00000040) {
	printk("/");
	nouveau_enum_print(nve0_fifo_fault_hubclient, client);
	} else {
	printk("/GPC%d/", (stat & 0x1f000000) >> 24);
	nouveau_enum_print(nve0_fifo_fault_gpcclient, client);
	}
	printk(" on channel 0x%010llx\n", (u64)inst << 12);
	}

	static int
	nve0_fifo_page_flip(struct drm_device *dev, u32 chid)
	{
	struct nve0_fifo_priv *priv = nv_engine(dev, NVOBJ_ENGINE_FIFO);
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_channel *chan = NULL;
	unsigned long flags;
	int ret = -EINVAL;

	spin_lock_irqsave(&dev_priv->channels.lock, flags);
	if (likely(chid >= 0 && chid < priv->base.channels)) {
	chan = dev_priv->channels.ptr[chid];
	if (likely(chan))
	ret = nouveau_finish_page_flip(chan, NULL);
	}
	spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
	return ret;
	}

	static void
	nve0_fifo_isr_subfifo_intr(struct drm_device *dev, int unit)
	{
	u32 stat = nv_rd32(dev, 0x040108 + (unit * 0x2000));
	u32 addr = nv_rd32(dev, 0x0400c0 + (unit * 0x2000));
	u32 data = nv_rd32(dev, 0x0400c4 + (unit * 0x2000));
	u32 chid = nv_rd32(dev, 0x040120 + (unit * 0x2000)) & 0x7f;
	u32 subc = (addr & 0x00070000);
	u32 mthd = (addr & 0x00003ffc);
	u32 show = stat;

	if (stat & 0x00200000) {
	if (mthd == 0x0054) {
	if (!nve0_fifo_page_flip(dev, chid))
	show &= ~0x00200000;
	}
	}

	if (show) {
	NV_INFO(dev, "PFIFO%d:", unit);
	nouveau_bitfield_print(nve0_fifo_subfifo_intr, show);
	NV_INFO(dev, "PFIFO%d: ch %d subc %d mthd 0x%04x data 0x%08x\n",
	unit, chid, subc, mthd, data);
	}

	nv_wr32(dev, 0x0400c0 + (unit * 0x2000), 0x80600008);
	nv_wr32(dev, 0x040108 + (unit * 0x2000), stat);
	}

	static void
	nve0_fifo_isr(struct drm_device *dev)
	{
	u32 mask = nv_rd32(dev, 0x002140);
	u32 stat = nv_rd32(dev, 0x002100) & mask;

	if (stat & 0x00000100) {
	NV_INFO(dev, "PFIFO: unknown status 0x00000100\n");
	nv_wr32(dev, 0x002100, 0x00000100);
	stat &= ~0x00000100;
	}

	if (stat & 0x10000000) {
	u32 units = nv_rd32(dev, 0x00259c);
	u32 u = units;

	while (u) {
	int i = ffs(u) - 1;
	nve0_fifo_isr_vm_fault(dev, i);
	u &= ~(1 << i);
	}

	nv_wr32(dev, 0x00259c, units);
	stat &= ~0x10000000;
	}

	if (stat & 0x20000000) {
	u32 units = nv_rd32(dev, 0x0025a0);
	u32 u = units;

	while (u) {
	int i = ffs(u) - 1;
	nve0_fifo_isr_subfifo_intr(dev, i);
	u &= ~(1 << i);
	}

	nv_wr32(dev, 0x0025a0, units);
	stat &= ~0x20000000;
	}

	if (stat & 0x40000000) {
	NV_INFO(dev, "PFIFO: unknown status 0x40000000\n");
	nv_mask(dev, 0x002a00, 0x00000000, 0x00000000);
	stat &= ~0x40000000;
	}

	if (stat) {
	NV_INFO(dev, "PFIFO: unhandled status 0x%08x\n", stat);
	nv_wr32(dev, 0x002100, stat);
	nv_wr32(dev, 0x002140, 0);
	}
	}

	static void
	nve0_fifo_destroy(struct drm_device *dev, int engine)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nve0_fifo_priv *priv = nv_engine(dev, engine);
	int i;

	nouveau_vm_put(&priv->user.bar);
	nouveau_gpuobj_ref(NULL, &priv->user.mem);

	for (i = 0; i < NVE0_FIFO_ENGINE_NUM; i++) {
	nouveau_gpuobj_ref(NULL, &priv->engine[i].playlist[0]);
	nouveau_gpuobj_ref(NULL, &priv->engine[i].playlist[1]);
	}

	dev_priv->eng[engine] = NULL;
	kfree(priv);
	}

	int
	nve0_fifo_create(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nve0_fifo_priv *priv;
	int ret;

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

	priv->base.base.destroy = nve0_fifo_destroy;
	priv->base.base.init = nve0_fifo_init;
	priv->base.base.fini = nve0_fifo_fini;
	priv->base.base.context_new = nve0_fifo_context_new;
	priv->base.base.context_del = nve0_fifo_context_del;
	priv->base.channels = 4096;
	dev_priv->eng[NVOBJ_ENGINE_FIFO] = &priv->base.base;

	ret = nouveau_gpuobj_new(dev, NULL, priv->base.channels * 512, 0x1000,
	NVOBJ_FLAG_ZERO_ALLOC, &priv->user.mem);
	if (ret)
	goto error;

	ret = nouveau_vm_get(dev_priv->bar1_vm, priv->user.mem->size,
	12, NV_MEM_ACCESS_RW, &priv->user.bar);
	if (ret)
	goto error;

	nouveau_vm_map(&priv->user.bar, (struct nouveau_mem *)priv->user.mem->node);

	nouveau_irq_register(dev, 8, nve0_fifo_isr);
	error:
	if (ret)
	priv->base.base.destroy(dev, NVOBJ_ENGINE_FIFO);
	return ret;
	}