1 files changed, 543 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
new file mode 100644
index 000000000..674faf002
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
@@ -0,0 +1,543 @@
+/*
+ * 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 "priv.h"
+#include "cgrp.h"
+#include "chan.h"
+#include "chid.h"
+#include "runl.h"
+
+#include "regsnv04.h"
+
+#include <core/ramht.h>
+#include <subdev/instmem.h>
+#include <subdev/mc.h>
+#include <subdev/timer.h>
+#include <engine/sw.h>
+
+#include <nvif/class.h>
+
+void
+nv04_chan_stop(struct nvkm_chan *chan)
+{
+	struct nvkm_fifo *fifo = chan->cgrp->runl->fifo;
+	struct nvkm_device *device = fifo->engine.subdev.device;
+	struct nvkm_memory *fctx = device->imem->ramfc;
+	const struct nvkm_ramfc_layout *c;
+	unsigned long flags;
+	u32 data = chan->ramfc_offset;
+	u32 chid;
+
+	/* prevent fifo context switches */
+	spin_lock_irqsave(&fifo->lock, flags);
+	nvkm_wr32(device, NV03_PFIFO_CACHES, 0);
+
+	/* if this channel is active, replace it with a null context */
+	chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & fifo->chid->mask;
+	if (chid == chan->id) {
+		nvkm_mask(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0x00000001, 0);
+		nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 0);
+		nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0);
+
+		c = chan->func->ramfc->layout;
+		nvkm_kmap(fctx);
+		do {
+			u32 rm = ((1ULL << c->bits) - 1) << c->regs;
+			u32 cm = ((1ULL << c->bits) - 1) << c->ctxs;
+			u32 rv = (nvkm_rd32(device, c->regp) &  rm) >> c->regs;
+			u32 cv = (nvkm_ro32(fctx, c->ctxp + data) & ~cm);
+			nvkm_wo32(fctx, c->ctxp + data, cv | (rv << c->ctxs));
+		} while ((++c)->bits);
+		nvkm_done(fctx);
+
+		c = chan->func->ramfc->layout;
+		do {
+			nvkm_wr32(device, c->regp, 0x00000000);
+		} while ((++c)->bits);
+
+		nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, 0);
+		nvkm_wr32(device, NV03_PFIFO_CACHE1_PUT, 0);
+		nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->chid->mask);
+		nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
+		nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
+	}
+
+	/* restore normal operation, after disabling dma mode */
+	nvkm_mask(device, NV04_PFIFO_MODE, BIT(chan->id), 0);
+	nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
+	spin_unlock_irqrestore(&fifo->lock, flags);
+}
+
+void
+nv04_chan_start(struct nvkm_chan *chan)
+{
+	struct nvkm_fifo *fifo = chan->cgrp->runl->fifo;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fifo->lock, flags);
+	nvkm_mask(fifo->engine.subdev.device, NV04_PFIFO_MODE, BIT(chan->id), BIT(chan->id));
+	spin_unlock_irqrestore(&fifo->lock, flags);
+}
+
+void
+nv04_chan_ramfc_clear(struct nvkm_chan *chan)
+{
+	struct nvkm_memory *ramfc = chan->cgrp->runl->fifo->engine.subdev.device->imem->ramfc;
+	const struct nvkm_ramfc_layout *c = chan->func->ramfc->layout;
+
+	nvkm_kmap(ramfc);
+	do {
+		nvkm_wo32(ramfc, chan->ramfc_offset + c->ctxp, 0x00000000);
+	} while ((++c)->bits);
+	nvkm_done(ramfc);
+}
+
+static int
+nv04_chan_ramfc_write(struct nvkm_chan *chan, u64 offset, u64 length, u32 devm, bool priv)
+{
+	struct nvkm_memory *ramfc = chan->cgrp->runl->fifo->engine.subdev.device->imem->ramfc;
+	const u32 base = chan->id * 32;
+
+	chan->ramfc_offset = base;
+
+	nvkm_kmap(ramfc);
+	nvkm_wo32(ramfc, base + 0x00, offset);
+	nvkm_wo32(ramfc, base + 0x04, offset);
+	nvkm_wo32(ramfc, base + 0x08, chan->push->addr >> 4);
+	nvkm_wo32(ramfc, base + 0x10, NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
+				      NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
+#ifdef __BIG_ENDIAN
+				      NV_PFIFO_CACHE1_BIG_ENDIAN |
+#endif
+				      NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8);
+	nvkm_done(ramfc);
+	return 0;
+}
+
+static const struct nvkm_chan_func_ramfc
+nv04_chan_ramfc = {
+	.layout = (const struct nvkm_ramfc_layout[]) {
+		{ 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 },
+		{}
+	},
+	.write = nv04_chan_ramfc_write,
+	.clear = nv04_chan_ramfc_clear,
+	.ctxdma = true,
+};
+
+const struct nvkm_chan_func_userd
+nv04_chan_userd = {
+	.bar = 0,
+	.base = 0x800000,
+	.size = 0x010000,
+};
+
+const struct nvkm_chan_func_inst
+nv04_chan_inst = {
+	.size = 0x1000,
+};
+
+static const struct nvkm_chan_func
+nv04_chan = {
+	.inst = &nv04_chan_inst,
+	.userd = &nv04_chan_userd,
+	.ramfc = &nv04_chan_ramfc,
+	.start = nv04_chan_start,
+	.stop = nv04_chan_stop,
+};
+
+const struct nvkm_cgrp_func
+nv04_cgrp = {
+};
+
+void
+nv04_eobj_ramht_del(struct nvkm_chan *chan, int hash)
+{
+	struct nvkm_fifo *fifo = chan->cgrp->runl->fifo;
+	struct nvkm_instmem *imem = fifo->engine.subdev.device->imem;
+
+	mutex_lock(&fifo->mutex);
+	nvkm_ramht_remove(imem->ramht, hash);
+	mutex_unlock(&fifo->mutex);
+}
+
+static int
+nv04_eobj_ramht_add(struct nvkm_engn *engn, struct nvkm_object *eobj, struct nvkm_chan *chan)
+{
+	struct nvkm_fifo *fifo = chan->cgrp->runl->fifo;
+	struct nvkm_instmem *imem = fifo->engine.subdev.device->imem;
+	u32 context = 0x80000000 | chan->id << 24 | engn->id << 16;
+	int hash;
+
+	mutex_lock(&fifo->mutex);
+	hash = nvkm_ramht_insert(imem->ramht, eobj, chan->id, 4, eobj->handle, context);
+	mutex_unlock(&fifo->mutex);
+	return hash;
+}
+
+const struct nvkm_engn_func
+nv04_engn = {
+	.ramht_add = nv04_eobj_ramht_add,
+	.ramht_del = nv04_eobj_ramht_del,
+};
+
+void
+nv04_fifo_pause(struct nvkm_fifo *fifo, unsigned long *pflags)
+__acquires(fifo->lock)
+{
+	struct nvkm_device *device = fifo->engine.subdev.device;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fifo->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 *fifo, unsigned long *pflags)
+__releases(fifo->lock)
+{
+	struct nvkm_device *device = fifo->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->lock, flags);
+}
+
+const struct nvkm_runl_func
+nv04_runl = {
+};
+
+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));
+		fallthrough;
+	case 0x0180 ... 0x01fc: /* handle -> instance */
+		data = nvkm_rd32(device, 0x003258) & 0x0000ffff;
+		fallthrough;
+	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_intr_cache_error(struct nvkm_fifo *fifo, u32 chid, u32 get)
+{
+	struct nvkm_subdev *subdev = &fifo->engine.subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_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_chan_get_chid(&fifo->engine, chid, &flags);
+		nvkm_error(subdev, "CACHE_ERROR - "
+			   "ch %d [%s] subc %d mthd %04x data %08x\n",
+			   chid, chan ? chan->name : "unknown",
+			   (mthd >> 13) & 7, mthd & 0x1ffc, data);
+		nvkm_chan_put(&chan, flags);
+	}
+
+	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_intr_dma_pusher(struct nvkm_fifo *fifo, u32 chid)
+{
+	struct nvkm_subdev *subdev = &fifo->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_chan *chan;
+	unsigned long flags;
+	const char *name;
+
+	chan = nvkm_chan_get_chid(&fifo->engine, chid, &flags);
+	name = chan ? chan->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_chan_put(&chan, flags);
+
+	nvkm_wr32(device, 0x003228, 0x00000000);
+	nvkm_wr32(device, 0x003220, 0x00000001);
+	nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
+}
+
+irqreturn_t
+nv04_fifo_intr(struct nvkm_inth *inth)
+{
+	struct nvkm_fifo *fifo = container_of(inth, typeof(*fifo), engine.subdev.inth);
+	struct nvkm_subdev *subdev = &fifo->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->chid->mask;
+	get  = nvkm_rd32(device, NV03_PFIFO_CACHE1_GET);
+
+	if (stat & NV_PFIFO_INTR_CACHE_ERROR) {
+		nv04_fifo_intr_cache_error(fifo, chid, get);
+		stat &= ~NV_PFIFO_INTR_CACHE_ERROR;
+	}
+
+	if (stat & NV_PFIFO_INTR_DMA_PUSHER) {
+		nv04_fifo_intr_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_event_ntfy(&fifo->nonstall.event, 0, NVKM_FIFO_NONSTALL_EVENT);
+			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);
+	return IRQ_HANDLED;
+}
+
+void
+nv04_fifo_init(struct nvkm_fifo *fifo)
+{
+	struct nvkm_device *device = fifo->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->chid->mask);
+
+	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_runl_ctor(struct nvkm_fifo *fifo)
+{
+	struct nvkm_runl *runl;
+
+	runl = nvkm_runl_new(fifo, 0, 0, 0);
+	if (IS_ERR(runl))
+		return PTR_ERR(runl);
+
+	nvkm_runl_add(runl, 0, fifo->func->engn_sw, NVKM_ENGINE_SW, 0);
+	nvkm_runl_add(runl, 0, fifo->func->engn_sw, NVKM_ENGINE_DMAOBJ, 0);
+	nvkm_runl_add(runl, 1, fifo->func->engn   , NVKM_ENGINE_GR, 0);
+	nvkm_runl_add(runl, 2, fifo->func->engn   , NVKM_ENGINE_MPEG, 0); /* NV31- */
+	return 0;
+}
+
+int
+nv04_fifo_chid_ctor(struct nvkm_fifo *fifo, int nr)
+{
+	/* The last CHID is reserved by HW as a "channel invalid" marker. */
+	return nvkm_chid_new(&nvkm_chan_event, &fifo->engine.subdev, nr, 0, nr - 1, &fifo->chid);
+}
+
+static int
+nv04_fifo_chid_nr(struct nvkm_fifo *fifo)
+{
+	return 16;
+}
+
+static const struct nvkm_fifo_func
+nv04_fifo = {
+	.chid_nr = nv04_fifo_chid_nr,
+	.chid_ctor = nv04_fifo_chid_ctor,
+	.runl_ctor = nv04_fifo_runl_ctor,
+	.init = nv04_fifo_init,
+	.intr = nv04_fifo_intr,
+	.pause = nv04_fifo_pause,
+	.start = nv04_fifo_start,
+	.runl = &nv04_runl,
+	.engn = &nv04_engn,
+	.engn_sw = &nv04_engn,
+	.cgrp = {{                        }, &nv04_cgrp },
+	.chan = {{ 0, 0, NV03_CHANNEL_DMA }, &nv04_chan },
+};
+
+int
+nv04_fifo_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+	      struct nvkm_fifo **pfifo)
+{
+	return nvkm_fifo_new_(&nv04_fifo, device, type, inst, pfifo);
+}