drm/nouveau/fifo: turn all fifo modules into engine modules

Been tested on each major revision that's relevant here, but I'm sure there
are still bugs waiting to be ironed out.

This is a *very* invasive change.

There's a couple of pieces left that I don't like much (eg. other engines
using fifo_priv for the channel count), but that's an artefact of there
being a master channel list still.  This is changing, slowly.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv84_fifo.c b/drivers/gpu/drm/nouveau/nv84_fifo.c
new file mode 100644
index 000000000000..cc82d799fc3b
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv84_fifo.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2012 Ben Skeggs.
+ * All Rights Reserved.
+ *
+ * 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 (including the
+ * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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 "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_fifo.h"
+#include "nouveau_ramht.h"
+#include "nouveau_vm.h"
+
+struct nv84_fifo_priv {
+	struct nouveau_fifo_priv base;
+	struct nouveau_gpuobj *playlist[2];
+	int cur_playlist;
+};
+
+struct nv84_fifo_chan {
+	struct nouveau_fifo_chan base;
+	struct nouveau_gpuobj *ramfc;
+	struct nouveau_gpuobj *cache;
+};
+
+static int
+nv84_fifo_context_new(struct nouveau_channel *chan, int engine)
+{
+	struct nv84_fifo_priv *priv = nv_engine(chan->dev, engine);
+	struct nv84_fifo_chan *fctx;
+	struct drm_device *dev = chan->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+        u64 ib_offset = chan->pushbuf_base + chan->dma.ib_base * 4;
+	u64 instance;
+	unsigned long flags;
+	int ret;
+
+	fctx = chan->engctx[engine] = kzalloc(sizeof(*fctx), GFP_KERNEL);
+	if (!fctx)
+		return -ENOMEM;
+	atomic_inc(&chan->vm->engref[engine]);
+
+	chan->user = ioremap(pci_resource_start(dev->pdev, 0) +
+			     NV50_USER(chan->id), PAGE_SIZE);
+	if (!chan->user) {
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	ret = nouveau_gpuobj_new(dev, chan, 256, 256, NVOBJ_FLAG_ZERO_ALLOC |
+				 NVOBJ_FLAG_ZERO_FREE, &fctx->ramfc);
+	if (ret)
+		goto error;
+
+	instance = fctx->ramfc->vinst >> 8;
+
+	ret = nouveau_gpuobj_new(dev, chan, 4096, 1024, 0, &fctx->cache);
+	if (ret)
+		goto error;
+
+	nv_wo32(fctx->ramfc, 0x3c, 0x403f6078);
+	nv_wo32(fctx->ramfc, 0x40, 0x00000000);
+	nv_wo32(fctx->ramfc, 0x44, 0x01003fff);
+	nv_wo32(fctx->ramfc, 0x48, chan->pushbuf->cinst >> 4);
+	nv_wo32(fctx->ramfc, 0x50, lower_32_bits(ib_offset));
+	nv_wo32(fctx->ramfc, 0x54, upper_32_bits(ib_offset) |
+				   drm_order(chan->dma.ib_max + 1) << 16);
+	nv_wo32(fctx->ramfc, 0x60, 0x7fffffff);
+	nv_wo32(fctx->ramfc, 0x78, 0x00000000);
+	nv_wo32(fctx->ramfc, 0x7c, 0x30000001);
+	nv_wo32(fctx->ramfc, 0x80, ((chan->ramht->bits - 9) << 27) |
+				   (4 << 24) /* SEARCH_FULL */ |
+				   (chan->ramht->gpuobj->cinst >> 4));
+	nv_wo32(fctx->ramfc, 0x88, fctx->cache->vinst >> 10);
+	nv_wo32(fctx->ramfc, 0x98, chan->ramin->vinst >> 12);
+
+	nv_wo32(chan->ramin, 0x00, chan->id);
+	nv_wo32(chan->ramin, 0x04, fctx->ramfc->vinst >> 8);
+
+	dev_priv->engine.instmem.flush(dev);
+
+	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
+	nv_wr32(dev, 0x002600 + (chan->id * 4), 0x80000000 | instance);
+	nv50_fifo_playlist_update(dev);
+	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
+
+error:
+	if (ret)
+		priv->base.base.context_del(chan, engine);
+	return ret;
+}
+
+static void
+nv84_fifo_context_del(struct nouveau_channel *chan, int engine)
+{
+	struct nv84_fifo_chan *fctx = chan->engctx[engine];
+	struct drm_device *dev = chan->dev;
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	unsigned long flags;
+
+	/* remove channel from playlist, will context switch if active */
+	spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
+	nv_mask(dev, 0x002600 + (chan->id * 4), 0x80000000, 0x00000000);
+	nv50_fifo_playlist_update(dev);
+
+	/* tell any engines on this channel to unload their contexts */
+	nv_wr32(dev, 0x0032fc, chan->ramin->vinst >> 12);
+	if (!nv_wait_ne(dev, 0x0032fc, 0xffffffff, 0xffffffff))
+		NV_INFO(dev, "PFIFO: channel %d unload timeout\n", chan->id);
+
+	nv_wr32(dev, 0x002600 + (chan->id * 4), 0x00000000);
+	spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
+
+	/* clean up */
+	if (chan->user) {
+		iounmap(chan->user);
+		chan->user = NULL;
+	}
+
+	nouveau_gpuobj_ref(NULL, &fctx->ramfc);
+	nouveau_gpuobj_ref(NULL, &fctx->cache);
+
+	atomic_dec(&chan->vm->engref[engine]);
+	chan->engctx[engine] = NULL;
+	kfree(fctx);
+}
+
+static int
+nv84_fifo_init(struct drm_device *dev, int engine)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nv84_fifo_chan *fctx;
+	u32 instance;
+	int i;
+
+	nv_mask(dev, 0x000200, 0x00000100, 0x00000000);
+	nv_mask(dev, 0x000200, 0x00000100, 0x00000100);
+	nv_wr32(dev, 0x00250c, 0x6f3cfc34);
+	nv_wr32(dev, 0x002044, 0x01003fff);
+
+	nv_wr32(dev, 0x002100, 0xffffffff);
+	nv_wr32(dev, 0x002140, 0xffffffff);
+
+	for (i = 0; i < 128; i++) {
+		struct nouveau_channel *chan = dev_priv->channels.ptr[i];
+		if (chan && (fctx = chan->engctx[engine]))
+			instance = 0x80000000 | fctx->ramfc->vinst >> 8;
+		else
+			instance = 0x00000000;
+		nv_wr32(dev, 0x002600 + (i * 4), instance);
+	}
+
+	nv50_fifo_playlist_update(dev);
+
+	nv_wr32(dev, 0x003200, 1);
+	nv_wr32(dev, 0x003250, 1);
+	nv_wr32(dev, 0x002500, 1);
+	return 0;
+}
+
+static int
+nv84_fifo_fini(struct drm_device *dev, int engine, bool suspend)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nv84_fifo_priv *priv = nv_engine(dev, engine);
+	int i;
+
+	/* set playlist length to zero, fifo will unload context */
+	nv_wr32(dev, 0x0032ec, 0);
+
+	/* tell all connected engines to unload their contexts */
+	for (i = 0; i < priv->base.channels; i++) {
+		struct nouveau_channel *chan = dev_priv->channels.ptr[i];
+		if (chan)
+			nv_wr32(dev, 0x0032fc, chan->ramin->vinst >> 12);
+		if (!nv_wait_ne(dev, 0x0032fc, 0xffffffff, 0xffffffff)) {
+			NV_INFO(dev, "PFIFO: channel %d unload timeout\n", i);
+			return -EBUSY;
+		}
+	}
+
+	nv_wr32(dev, 0x002140, 0);
+	return 0;
+}
+
+int
+nv84_fifo_create(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nv84_fifo_priv *priv;
+	int ret;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base.base.destroy = nv50_fifo_destroy;
+	priv->base.base.init = nv84_fifo_init;
+	priv->base.base.fini = nv84_fifo_fini;
+	priv->base.base.context_new = nv84_fifo_context_new;
+	priv->base.base.context_del = nv84_fifo_context_del;
+	priv->base.base.tlb_flush = nv50_fifo_tlb_flush;
+	priv->base.channels = 127;
+	dev_priv->eng[NVOBJ_ENGINE_FIFO] = &priv->base.base;
+
+	ret = nouveau_gpuobj_new(dev, NULL, priv->base.channels * 4, 0x1000,
+				 NVOBJ_FLAG_ZERO_ALLOC, &priv->playlist[0]);
+	if (ret)
+		goto error;
+
+	ret = nouveau_gpuobj_new(dev, NULL, priv->base.channels * 4, 0x1000,
+				 NVOBJ_FLAG_ZERO_ALLOC, &priv->playlist[1]);
+	if (ret)
+		goto error;
+
+	nouveau_irq_register(dev, 8, nv04_fifo_isr);
+error:
+	if (ret)
+		priv->base.base.destroy(dev, NVOBJ_ENGINE_FIFO);
+	return ret;
+}