drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c - nest-learning-thermostat/6.0/linux-imx-4.9.88 - Git at Google

 /*
  * 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 "nv04.h"
 #include "channv04.h"
 #include "regsnv04.h"

 #include <core/client.h>
 #include <core/ramht.h>
 #include <subdev/instmem.h>
 #include <subdev/timer.h>
 #include <engine/sw.h>

 static const struct nv04_fifo_ramfc
 nv04_fifo_ramfc[] = {
 	{ 32,  0, 0x00,  0, NV04_PFIFO_CACHE1_DMA_PUT },
 	{ 32,  0, 0x04,  0, NV04_PFIFO_CACHE1_DMA_GET },
 	{ 16,  0, 0x08,  0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
 	{ 16, 16, 0x08,  0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
 	{ 32,  0, 0x0c,  0, NV04_PFIFO_CACHE1_DMA_STATE },
 	{ 32,  0, 0x10,  0, NV04_PFIFO_CACHE1_DMA_FETCH },
 	{ 32,  0, 0x14,  0, NV04_PFIFO_CACHE1_ENGINE },
 	{ 32,  0, 0x18,  0, NV04_PFIFO_CACHE1_PULL1 },
 	{}
 };

 void
 nv04_fifo_pause(struct nvkm_fifo *base, unsigned long *pflags)
 __acquires(fifo->base.lock)
 {
 	struct nv04_fifo *fifo = nv04_fifo(base);
 	struct nvkm_device *device = fifo->base.engine.subdev.device;
 	unsigned long flags;

 	spin_lock_irqsave(&fifo->base.lock, flags);
 	*pflags = flags;

 	nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000000);
 	nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000000);

 	/* in some cases the puller may be left in an inconsistent state
 	 * if you try to stop it while it's busy translating handles.
 	 * sometimes you get a CACHE_ERROR, sometimes it just fails
 	 * silently; sending incorrect instance offsets to PGRAPH after
 	 * it's started up again.
 	 *
 	 * to avoid this, we invalidate the most recently calculated
 	 * instance.
 	 */
 	nvkm_msec(device, 2000,
 		u32 tmp = nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0);
 		if (!(tmp & NV04_PFIFO_CACHE1_PULL0_HASH_BUSY))
 			break;
 	);

 	if (nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0) &
 			  NV04_PFIFO_CACHE1_PULL0_HASH_FAILED)
 		nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);

 	nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0x00000000);
 }

 void
 nv04_fifo_start(struct nvkm_fifo *base, unsigned long *pflags)
 __releases(fifo->base.lock)
 {
 	struct nv04_fifo *fifo = nv04_fifo(base);
 	struct nvkm_device *device = fifo->base.engine.subdev.device;
 	unsigned long flags = *pflags;

 	nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000001);
 	nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000001);

 	spin_unlock_irqrestore(&fifo->base.lock, flags);
 }

 static const char *
 nv_dma_state_err(u32 state)
 {
 	static const char * const desc[] = {
 		"NONE", "CALL_SUBR_ACTIVE", "INVALID_MTHD", "RET_SUBR_INACTIVE",
 		"INVALID_CMD", "IB_EMPTY"/* NV50+ */, "MEM_FAULT", "UNK"
 	};
 	return desc[(state >> 29) & 0x7];
 }

 static bool
 nv04_fifo_swmthd(struct nvkm_device *device, u32 chid, u32 addr, u32 data)
 {
 	struct nvkm_sw *sw = device->sw;
 	const int subc = (addr & 0x0000e000) >> 13;
 	const int mthd = (addr & 0x00001ffc);
 	const u32 mask = 0x0000000f << (subc * 4);
 	u32 engine = nvkm_rd32(device, 0x003280);
 	bool handled = false;

 	switch (mthd) {
 	case 0x0000 ... 0x0000: /* subchannel's engine -> software */
 		nvkm_wr32(device, 0x003280, (engine &= ~mask));
 	case 0x0180 ... 0x01fc: /* handle -> instance */
 		data = nvkm_rd32(device, 0x003258) & 0x0000ffff;
 	case 0x0100 ... 0x017c:
 	case 0x0200 ... 0x1ffc: /* pass method down to sw */
 		if (!(engine & mask) && sw)
 			handled = nvkm_sw_mthd(sw, chid, subc, mthd, data);
 		break;
 	default:
 		break;
 	}

 	return handled;
 }

 static void
 nv04_fifo_cache_error(struct nv04_fifo *fifo, u32 chid, u32 get)
 {
 	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	struct nvkm_fifo_chan *chan;
 	unsigned long flags;
 	u32 pull0 = nvkm_rd32(device, 0x003250);
 	u32 mthd, data;
 	int ptr;

 	/* NV_PFIFO_CACHE1_GET actually goes to 0xffc before wrapping on my
 	 * G80 chips, but CACHE1 isn't big enough for this much data.. Tests
 	 * show that it wraps around to the start at GET=0x800.. No clue as to
 	 * why..
 	 */
 	ptr = (get & 0x7ff) >> 2;

 	if (device->card_type < NV_40) {
 		mthd = nvkm_rd32(device, NV04_PFIFO_CACHE1_METHOD(ptr));
 		data = nvkm_rd32(device, NV04_PFIFO_CACHE1_DATA(ptr));
 	} else {
 		mthd = nvkm_rd32(device, NV40_PFIFO_CACHE1_METHOD(ptr));
 		data = nvkm_rd32(device, NV40_PFIFO_CACHE1_DATA(ptr));
 	}

 	if (!(pull0 & 0x00000100) ||
 	    !nv04_fifo_swmthd(device, chid, mthd, data)) {
 		chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
 		nvkm_error(subdev, "CACHE_ERROR - "
 			   "ch %d [%s] subc %d mthd %04x data %08x\n",
 			   chid, chan ? chan->object.client->name : "unknown",
 			   (mthd >> 13) & 7, mthd & 0x1ffc, data);
 		nvkm_fifo_chan_put(&fifo->base, flags, &chan);
 	}

 	nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0);
 	nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);

 	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
 		nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) & ~1);
 	nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
 	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
 		nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) | 1);
 	nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0);

 	nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH,
 		nvkm_rd32(device, NV04_PFIFO_CACHE1_DMA_PUSH) | 1);
 	nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 }

 static void
 nv04_fifo_dma_pusher(struct nv04_fifo *fifo, u32 chid)
 {
 	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 dma_get = nvkm_rd32(device, 0x003244);
 	u32 dma_put = nvkm_rd32(device, 0x003240);
 	u32 push = nvkm_rd32(device, 0x003220);
 	u32 state = nvkm_rd32(device, 0x003228);
 	struct nvkm_fifo_chan *chan;
 	unsigned long flags;
 	const char *name;

 	chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
 	name = chan ? chan->object.client->name : "unknown";
 	if (device->card_type == NV_50) {
 		u32 ho_get = nvkm_rd32(device, 0x003328);
 		u32 ho_put = nvkm_rd32(device, 0x003320);
 		u32 ib_get = nvkm_rd32(device, 0x003334);
 		u32 ib_put = nvkm_rd32(device, 0x003330);

 		nvkm_error(subdev, "DMA_PUSHER - "
 			   "ch %d [%s] get %02x%08x put %02x%08x ib_get %08x "
 			   "ib_put %08x state %08x (err: %s) push %08x\n",
 			   chid, name, ho_get, dma_get, ho_put, dma_put,
 			   ib_get, ib_put, state, nv_dma_state_err(state),
 			   push);

 		/* METHOD_COUNT, in DMA_STATE on earlier chipsets */
 		nvkm_wr32(device, 0x003364, 0x00000000);
 		if (dma_get != dma_put || ho_get != ho_put) {
 			nvkm_wr32(device, 0x003244, dma_put);
 			nvkm_wr32(device, 0x003328, ho_put);
 		} else
 		if (ib_get != ib_put)
 			nvkm_wr32(device, 0x003334, ib_put);
 	} else {
 		nvkm_error(subdev, "DMA_PUSHER - ch %d [%s] get %08x put %08x "
 				   "state %08x (err: %s) push %08x\n",
 			   chid, name, dma_get, dma_put, state,
 			   nv_dma_state_err(state), push);

 		if (dma_get != dma_put)
 			nvkm_wr32(device, 0x003244, dma_put);
 	}
 	nvkm_fifo_chan_put(&fifo->base, flags, &chan);

 	nvkm_wr32(device, 0x003228, 0x00000000);
 	nvkm_wr32(device, 0x003220, 0x00000001);
 	nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
 }

 void
 nv04_fifo_intr(struct nvkm_fifo *base)
 {
 	struct nv04_fifo *fifo = nv04_fifo(base);
 	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	u32 mask = nvkm_rd32(device, NV03_PFIFO_INTR_EN_0);
 	u32 stat = nvkm_rd32(device, NV03_PFIFO_INTR_0) & mask;
 	u32 reassign, chid, get, sem;

 	reassign = nvkm_rd32(device, NV03_PFIFO_CACHES) & 1;
 	nvkm_wr32(device, NV03_PFIFO_CACHES, 0);

 	chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & (fifo->base.nr - 1);
 	get  = nvkm_rd32(device, NV03_PFIFO_CACHE1_GET);

 	if (stat & NV_PFIFO_INTR_CACHE_ERROR) {
 		nv04_fifo_cache_error(fifo, chid, get);
 		stat &= ~NV_PFIFO_INTR_CACHE_ERROR;
 	}

 	if (stat & NV_PFIFO_INTR_DMA_PUSHER) {
 		nv04_fifo_dma_pusher(fifo, chid);
 		stat &= ~NV_PFIFO_INTR_DMA_PUSHER;
 	}

 	if (stat & NV_PFIFO_INTR_SEMAPHORE) {
 		stat &= ~NV_PFIFO_INTR_SEMAPHORE;
 		nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_SEMAPHORE);

 		sem = nvkm_rd32(device, NV10_PFIFO_CACHE1_SEMAPHORE);
 		nvkm_wr32(device, NV10_PFIFO_CACHE1_SEMAPHORE, sem | 0x1);

 		nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
 		nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 	}

 	if (device->card_type == NV_50) {
 		if (stat & 0x00000010) {
 			stat &= ~0x00000010;
 			nvkm_wr32(device, 0x002100, 0x00000010);
 		}

 		if (stat & 0x40000000) {
 			nvkm_wr32(device, 0x002100, 0x40000000);
 			nvkm_fifo_uevent(&fifo->base);
 			stat &= ~0x40000000;
 		}
 	}

 	if (stat) {
 		nvkm_warn(subdev, "intr %08x\n", stat);
 		nvkm_mask(device, NV03_PFIFO_INTR_EN_0, stat, 0x00000000);
 		nvkm_wr32(device, NV03_PFIFO_INTR_0, stat);
 	}

 	nvkm_wr32(device, NV03_PFIFO_CACHES, reassign);
 }

 void
 nv04_fifo_init(struct nvkm_fifo *base)
 {
 	struct nv04_fifo *fifo = nv04_fifo(base);
 	struct nvkm_device *device = fifo->base.engine.subdev.device;
 	struct nvkm_instmem *imem = device->imem;
 	struct nvkm_ramht *ramht = imem->ramht;
 	struct nvkm_memory *ramro = imem->ramro;
 	struct nvkm_memory *ramfc = imem->ramfc;

 	nvkm_wr32(device, NV04_PFIFO_DELAY_0, 0x000000ff);
 	nvkm_wr32(device, NV04_PFIFO_DMA_TIMESLICE, 0x0101ffff);

 	nvkm_wr32(device, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ |
 					    ((ramht->bits - 9) << 16) |
 					    (ramht->gpuobj->addr >> 8));
 	nvkm_wr32(device, NV03_PFIFO_RAMRO, nvkm_memory_addr(ramro) >> 8);
 	nvkm_wr32(device, NV03_PFIFO_RAMFC, nvkm_memory_addr(ramfc) >> 8);

 	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->base.nr - 1);

 	nvkm_wr32(device, NV03_PFIFO_INTR_0, 0xffffffff);
 	nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);

 	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
 	nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 	nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
 }

 int
 nv04_fifo_new_(const struct nvkm_fifo_func *func, struct nvkm_device *device,
 	       int index, int nr, const struct nv04_fifo_ramfc *ramfc,
 	       struct nvkm_fifo **pfifo)
 {
 	struct nv04_fifo *fifo;
 	int ret;

 	if (!(fifo = kzalloc(sizeof(*fifo), GFP_KERNEL)))
 		return -ENOMEM;
 	fifo->ramfc = ramfc;
 	*pfifo = &fifo->base;

 	ret = nvkm_fifo_ctor(func, device, index, nr, &fifo->base);
 	if (ret)
 		return ret;

 	set_bit(nr - 1, fifo->base.mask); /* inactive channel */
 	return 0;
 }

 static const struct nvkm_fifo_func
 nv04_fifo = {
 	.init = nv04_fifo_init,
 	.intr = nv04_fifo_intr,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.chan = {
 		&nv04_fifo_dma_oclass,
 		NULL
 	},
 };

 int
 nv04_fifo_new(struct nvkm_device *device, int index, struct nvkm_fifo **pfifo)
 {
 	return nv04_fifo_new_(&nv04_fifo, device, index, 16,
 			      nv04_fifo_ramfc, pfifo);
 }
	/*
	* 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 "nv04.h"
	#include "channv04.h"
	#include "regsnv04.h"

	#include <core/client.h>
	#include <core/ramht.h>
	#include <subdev/instmem.h>
	#include <subdev/timer.h>
	#include <engine/sw.h>

	static const struct nv04_fifo_ramfc
	nv04_fifo_ramfc[] = {
	{ 32, 0, 0x00, 0, NV04_PFIFO_CACHE1_DMA_PUT },
	{ 32, 0, 0x04, 0, NV04_PFIFO_CACHE1_DMA_GET },
	{ 16, 0, 0x08, 0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
	{ 16, 16, 0x08, 0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
	{ 32, 0, 0x0c, 0, NV04_PFIFO_CACHE1_DMA_STATE },
	{ 32, 0, 0x10, 0, NV04_PFIFO_CACHE1_DMA_FETCH },
	{ 32, 0, 0x14, 0, NV04_PFIFO_CACHE1_ENGINE },
	{ 32, 0, 0x18, 0, NV04_PFIFO_CACHE1_PULL1 },
	{}
	};

	void
	nv04_fifo_pause(struct nvkm_fifo base, unsigned long pflags)
	__acquires(fifo->base.lock)
	{
	struct nv04_fifo *fifo = nv04_fifo(base);
	struct nvkm_device *device = fifo->base.engine.subdev.device;
	unsigned long flags;

	spin_lock_irqsave(&fifo->base.lock, flags);
	*pflags = flags;

	nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000000);
	nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000000);

	/* in some cases the puller may be left in an inconsistent state
	* if you try to stop it while it's busy translating handles.
	* sometimes you get a CACHE_ERROR, sometimes it just fails
	* silently; sending incorrect instance offsets to PGRAPH after
	* it's started up again.
	*
	* to avoid this, we invalidate the most recently calculated
	* instance.
	*/
	nvkm_msec(device, 2000,
	u32 tmp = nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0);
	if (!(tmp & NV04_PFIFO_CACHE1_PULL0_HASH_BUSY))
	break;
	);

	if (nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0) &
	NV04_PFIFO_CACHE1_PULL0_HASH_FAILED)
	nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);

	nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0x00000000);
	}

	void
	nv04_fifo_start(struct nvkm_fifo base, unsigned long pflags)
	__releases(fifo->base.lock)
	{
	struct nv04_fifo *fifo = nv04_fifo(base);
	struct nvkm_device *device = fifo->base.engine.subdev.device;
	unsigned long flags = *pflags;

	nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000001);
	nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000001);

	spin_unlock_irqrestore(&fifo->base.lock, flags);
	}

	static const char *
	nv_dma_state_err(u32 state)
	{
	static const char * const desc[] = {
	"NONE", "CALL_SUBR_ACTIVE", "INVALID_MTHD", "RET_SUBR_INACTIVE",
	"INVALID_CMD", "IB_EMPTY"/* NV50+ */, "MEM_FAULT", "UNK"
	};
	return desc[(state >> 29) & 0x7];
	}

	static bool
	nv04_fifo_swmthd(struct nvkm_device *device, u32 chid, u32 addr, u32 data)
	{
	struct nvkm_sw *sw = device->sw;
	const int subc = (addr & 0x0000e000) >> 13;
	const int mthd = (addr & 0x00001ffc);
	const u32 mask = 0x0000000f << (subc * 4);
	u32 engine = nvkm_rd32(device, 0x003280);
	bool handled = false;

	switch (mthd) {
	case 0x0000 ... 0x0000: /* subchannel's engine -> software */
	nvkm_wr32(device, 0x003280, (engine &= ~mask));
	case 0x0180 ... 0x01fc: /* handle -> instance */
	data = nvkm_rd32(device, 0x003258) & 0x0000ffff;
	case 0x0100 ... 0x017c:
	case 0x0200 ... 0x1ffc: /* pass method down to sw */
	if (!(engine & mask) && sw)
	handled = nvkm_sw_mthd(sw, chid, subc, mthd, data);
	break;
	default:
	break;
	}

	return handled;
	}

	static void
	nv04_fifo_cache_error(struct nv04_fifo *fifo, u32 chid, u32 get)
	{
	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
	struct nvkm_device *device = subdev->device;
	struct nvkm_fifo_chan *chan;
	unsigned long flags;
	u32 pull0 = nvkm_rd32(device, 0x003250);
	u32 mthd, data;
	int ptr;

	/* NV_PFIFO_CACHE1_GET actually goes to 0xffc before wrapping on my
	* G80 chips, but CACHE1 isn't big enough for this much data.. Tests
	* show that it wraps around to the start at GET=0x800.. No clue as to
	* why..
	*/
	ptr = (get & 0x7ff) >> 2;

	if (device->card_type < NV_40) {
	mthd = nvkm_rd32(device, NV04_PFIFO_CACHE1_METHOD(ptr));
	data = nvkm_rd32(device, NV04_PFIFO_CACHE1_DATA(ptr));
	} else {
	mthd = nvkm_rd32(device, NV40_PFIFO_CACHE1_METHOD(ptr));
	data = nvkm_rd32(device, NV40_PFIFO_CACHE1_DATA(ptr));
	}

	if (!(pull0 & 0x00000100) \|\|
	!nv04_fifo_swmthd(device, chid, mthd, data)) {
	chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
	nvkm_error(subdev, "CACHE_ERROR - "
	"ch %d [%s] subc %d mthd %04x data %08x\n",
	chid, chan ? chan->object.client->name : "unknown",
	(mthd >> 13) & 7, mthd & 0x1ffc, data);
	nvkm_fifo_chan_put(&fifo->base, flags, &chan);
	}

	nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0);
	nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);

	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
	nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) & ~1);
	nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
	nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) \| 1);
	nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0);

	nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH,
	nvkm_rd32(device, NV04_PFIFO_CACHE1_DMA_PUSH) \| 1);
	nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
	}

	static void
	nv04_fifo_dma_pusher(struct nv04_fifo *fifo, u32 chid)
	{
	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
	struct nvkm_device *device = subdev->device;
	u32 dma_get = nvkm_rd32(device, 0x003244);
	u32 dma_put = nvkm_rd32(device, 0x003240);
	u32 push = nvkm_rd32(device, 0x003220);
	u32 state = nvkm_rd32(device, 0x003228);
	struct nvkm_fifo_chan *chan;
	unsigned long flags;
	const char *name;

	chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
	name = chan ? chan->object.client->name : "unknown";
	if (device->card_type == NV_50) {
	u32 ho_get = nvkm_rd32(device, 0x003328);
	u32 ho_put = nvkm_rd32(device, 0x003320);
	u32 ib_get = nvkm_rd32(device, 0x003334);
	u32 ib_put = nvkm_rd32(device, 0x003330);

	nvkm_error(subdev, "DMA_PUSHER - "
	"ch %d [%s] get %02x%08x put %02x%08x ib_get %08x "
	"ib_put %08x state %08x (err: %s) push %08x\n",
	chid, name, ho_get, dma_get, ho_put, dma_put,
	ib_get, ib_put, state, nv_dma_state_err(state),
	push);

	/* METHOD_COUNT, in DMA_STATE on earlier chipsets */
	nvkm_wr32(device, 0x003364, 0x00000000);
	if (dma_get != dma_put \|\| ho_get != ho_put) {
	nvkm_wr32(device, 0x003244, dma_put);
	nvkm_wr32(device, 0x003328, ho_put);
	} else
	if (ib_get != ib_put)
	nvkm_wr32(device, 0x003334, ib_put);
	} else {
	nvkm_error(subdev, "DMA_PUSHER - ch %d [%s] get %08x put %08x "
	"state %08x (err: %s) push %08x\n",
	chid, name, dma_get, dma_put, state,
	nv_dma_state_err(state), push);

	if (dma_get != dma_put)
	nvkm_wr32(device, 0x003244, dma_put);
	}
	nvkm_fifo_chan_put(&fifo->base, flags, &chan);

	nvkm_wr32(device, 0x003228, 0x00000000);
	nvkm_wr32(device, 0x003220, 0x00000001);
	nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
	}

	void
	nv04_fifo_intr(struct nvkm_fifo *base)
	{
	struct nv04_fifo *fifo = nv04_fifo(base);
	struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
	struct nvkm_device *device = subdev->device;
	u32 mask = nvkm_rd32(device, NV03_PFIFO_INTR_EN_0);
	u32 stat = nvkm_rd32(device, NV03_PFIFO_INTR_0) & mask;
	u32 reassign, chid, get, sem;

	reassign = nvkm_rd32(device, NV03_PFIFO_CACHES) & 1;
	nvkm_wr32(device, NV03_PFIFO_CACHES, 0);

	chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & (fifo->base.nr - 1);
	get = nvkm_rd32(device, NV03_PFIFO_CACHE1_GET);

	if (stat & NV_PFIFO_INTR_CACHE_ERROR) {
	nv04_fifo_cache_error(fifo, chid, get);
	stat &= ~NV_PFIFO_INTR_CACHE_ERROR;
	}

	if (stat & NV_PFIFO_INTR_DMA_PUSHER) {
	nv04_fifo_dma_pusher(fifo, chid);
	stat &= ~NV_PFIFO_INTR_DMA_PUSHER;
	}

	if (stat & NV_PFIFO_INTR_SEMAPHORE) {
	stat &= ~NV_PFIFO_INTR_SEMAPHORE;
	nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_SEMAPHORE);

	sem = nvkm_rd32(device, NV10_PFIFO_CACHE1_SEMAPHORE);
	nvkm_wr32(device, NV10_PFIFO_CACHE1_SEMAPHORE, sem \| 0x1);

	nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
	nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
	}

	if (device->card_type == NV_50) {
	if (stat & 0x00000010) {
	stat &= ~0x00000010;
	nvkm_wr32(device, 0x002100, 0x00000010);
	}

	if (stat & 0x40000000) {
	nvkm_wr32(device, 0x002100, 0x40000000);
	nvkm_fifo_uevent(&fifo->base);
	stat &= ~0x40000000;
	}
	}

	if (stat) {
	nvkm_warn(subdev, "intr %08x\n", stat);
	nvkm_mask(device, NV03_PFIFO_INTR_EN_0, stat, 0x00000000);
	nvkm_wr32(device, NV03_PFIFO_INTR_0, stat);
	}

	nvkm_wr32(device, NV03_PFIFO_CACHES, reassign);
	}

	void
	nv04_fifo_init(struct nvkm_fifo *base)
	{
	struct nv04_fifo *fifo = nv04_fifo(base);
	struct nvkm_device *device = fifo->base.engine.subdev.device;
	struct nvkm_instmem *imem = device->imem;
	struct nvkm_ramht *ramht = imem->ramht;
	struct nvkm_memory *ramro = imem->ramro;
	struct nvkm_memory *ramfc = imem->ramfc;

	nvkm_wr32(device, NV04_PFIFO_DELAY_0, 0x000000ff);
	nvkm_wr32(device, NV04_PFIFO_DMA_TIMESLICE, 0x0101ffff);

	nvkm_wr32(device, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ \|
	((ramht->bits - 9) << 16) \|
	(ramht->gpuobj->addr >> 8));
	nvkm_wr32(device, NV03_PFIFO_RAMRO, nvkm_memory_addr(ramro) >> 8);
	nvkm_wr32(device, NV03_PFIFO_RAMFC, nvkm_memory_addr(ramfc) >> 8);

	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->base.nr - 1);

	nvkm_wr32(device, NV03_PFIFO_INTR_0, 0xffffffff);
	nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);

	nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
	nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
	nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
	}

	int
	nv04_fifo_new_(const struct nvkm_fifo_func func, struct nvkm_device device,
	int index, int nr, const struct nv04_fifo_ramfc *ramfc,
	struct nvkm_fifo **pfifo)
	{
	struct nv04_fifo *fifo;
	int ret;

	if (!(fifo = kzalloc(sizeof(*fifo), GFP_KERNEL)))
	return -ENOMEM;
	fifo->ramfc = ramfc;
	*pfifo = &fifo->base;

	ret = nvkm_fifo_ctor(func, device, index, nr, &fifo->base);
	if (ret)
	return ret;

	set_bit(nr - 1, fifo->base.mask); /* inactive channel */
	return 0;
	}

	static const struct nvkm_fifo_func
	nv04_fifo = {
	.init = nv04_fifo_init,
	.intr = nv04_fifo_intr,
	.pause = nv04_fifo_pause,
	.start = nv04_fifo_start,
	.chan = {
	&nv04_fifo_dma_oclass,
	NULL
	},
	};

	int
	nv04_fifo_new(struct nvkm_device device, int index, struct nvkm_fifo *pfifo)
	{
	return nv04_fifo_new_(&nv04_fifo, device, index, 16,
	nv04_fifo_ramfc, pfifo);
	}