/*
* 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 <drm/drmP.h>
#include "nouveau_drv.h"
#include "nouveau_fifo.h"
#include "nouveau_ramht.h"
#include "nouveau_vm.h"
struct nv50_fifo_priv {
struct nouveau_fifo_priv base;
struct nouveau_gpuobj *playlist[2];
int cur_playlist;
};
struct nv50_fifo_chan {
struct nouveau_fifo_chan base;
};
void
nv50_fifo_playlist_update(struct drm_device *dev)
{
struct nv50_fifo_priv *priv = nv_engine(dev, NVOBJ_ENGINE_FIFO);
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpuobj *cur;
int i, p;
cur = priv->playlist[priv->cur_playlist];
priv->cur_playlist = !priv->cur_playlist;
for (i = 0, p = 0; i < priv->base.channels; i++) {
if (nv_rd32(dev, 0x002600 + (i * 4)) & 0x80000000)
nv_wo32(cur, p++ * 4, i);
}
dev_priv->engine.instmem.flush(dev);
nv_wr32(dev, 0x0032f4, cur->vinst >> 12);
nv_wr32(dev, 0x0032ec, p);
nv_wr32(dev, 0x002500, 0x00000101);
}
static int
nv50_fifo_context_new(struct nouveau_channel *chan, int engine)
{
struct nv50_fifo_priv *priv = nv_engine(chan->dev, engine);
struct nv50_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 = chan->ramin->vinst >> 12;
unsigned long flags;
int ret = 0, i;
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;
}
for (i = 0; i < 0x100; i += 4)
nv_wo32(chan->ramin, i, 0x00000000);
nv_wo32(chan->ramin, 0x3c, 0x403f6078);
nv_wo32(chan->ramin, 0x40, 0x00000000);
nv_wo32(chan->ramin, 0x44, 0x01003fff);
nv_wo32(chan->ramin, 0x48, chan->pushbuf->cinst >> 4);
nv_wo32(chan->ramin, 0x50, lower_32_bits(ib_offset));
nv_wo32(chan->ramin, 0x54, upper_32_bits(ib_offset) |
drm_order(chan->dma.ib_max + 1) << 16);
nv_wo32(chan->ramin, 0x60, 0x7fffffff);
nv_wo32(chan->ramin, 0x78, 0x00000000);
nv_wo32(chan->ramin, 0x7c, 0x30000001);
nv_wo32(chan->ramin, 0x80, ((chan->ramht->bits - 9) << 27) |
(4 << 24) /* SEARCH_FULL */ |
(chan->ramht->gpuobj->cinst >> 4));
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 bool
nv50_fifo_kickoff(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
bool done = true;
u32 me;
/* HW bug workaround:
*
* PFIFO will hang forever if the connected engines don't report
* that they've processed the context switch request.
*
* In order for the kickoff to work, we need to ensure all the
* connected engines are in a state where they can answer.
*
* Newer chipsets don't seem to suffer from this issue, and well,
* there's also a "ignore these engines" bitmask reg we can use
* if we hit the issue there..
*/
/* PME: make sure engine is enabled */
me = nv_mask(dev, 0x00b860, 0x00000001, 0x00000001);
/* do the kickoff... */
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);
done = false;
}
/* restore any engine states we changed, and exit */
nv_wr32(dev, 0x00b860, me);
return done;
}
static void
nv50_fifo_context_del(struct nouveau_channel *chan, int engine)
{
struct nv50_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 */
nv50_fifo_kickoff(chan);
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;
}
atomic_dec(&chan->vm->engref[engine]);
chan->engctx[engine] = NULL;
kfree(fctx);
}
static int
nv50_fifo_init(struct drm_device *dev, int engine)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
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 && chan->engctx[engine])
instance = 0x80000000 | chan->ramin->vinst >> 12;
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
nv50_fifo_fini(struct drm_device *dev, int engine, bool suspend)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_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 && !nv50_fifo_kickoff(chan))
return -EBUSY;
}
nv_wr32(dev, 0x002140, 0);
return 0;
}
void
nv50_fifo_tlb_flush(struct drm_device *dev, int engine)
{
nv50_vm_flush_engine(dev, 5);
}
void
nv50_fifo_destroy(struct drm_device *dev, int engine)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_fifo_priv *priv = nv_engine(dev, engine);
nouveau_irq_unregister(dev, 8);
nouveau_gpuobj_ref(NULL, &priv->playlist[0]);
nouveau_gpuobj_ref(NULL, &priv->playlist[1]);
dev_priv->eng[engine] = NULL;
kfree(priv);
}
int
nv50_fifo_create(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nv50_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 = nv50_fifo_init;
priv->base.base.fini = nv50_fifo_fini;
priv->base.base.context_new = nv50_fifo_context_new;
priv->base.base.context_del = nv50_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;
}
