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/*
* 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 <core/object.h>
#include <core/handle.h>
#include <core/class.h>
#include <engine/dmaobj.h>
#include <engine/fifo.h>
int
nouveau_fifo_channel_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass,
int bar, u32 addr, u32 size, u32 pushbuf,
u64 engmask, int len, void **ptr)
{
struct nouveau_device *device = nv_device(engine);
struct nouveau_fifo *priv = (void *)engine;
struct nouveau_fifo_chan *chan;
struct nouveau_dmaeng *dmaeng;
unsigned long flags;
int ret;
/* create base object class */
ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
engmask, len, ptr);
chan = *ptr;
if (ret)
return ret;
/* validate dma object representing push buffer */
chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
if (!chan->pushdma)
return -ENOENT;
dmaeng = (void *)chan->pushdma->base.engine;
switch (chan->pushdma->base.oclass->handle) {
case NV_DMA_FROM_MEMORY_CLASS:
case NV_DMA_IN_MEMORY_CLASS:
break;
default:
return -EINVAL;
}
ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu);
if (ret)
return ret;
/* find a free fifo channel */
spin_lock_irqsave(&priv->lock, flags);
for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) {
if (!priv->channel[chan->chid]) {
priv->channel[chan->chid] = nv_object(chan);
break;
}
}
spin_unlock_irqrestore(&priv->lock, flags);
if (chan->chid == priv->max) {
nv_error(priv, "no free channels\n");
return -ENOSPC;
}
/* map fifo control registers */
chan->user = ioremap(pci_resource_start(device->pdev, bar) + addr +
(chan->chid * size), size);
if (!chan->user)
return -EFAULT;
chan->size = size;
return 0;
}
void
nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan)
{
struct nouveau_fifo *priv = (void *)nv_object(chan)->engine;
unsigned long flags;
iounmap(chan->user);
spin_lock_irqsave(&priv->lock, flags);
priv->channel[chan->chid] = NULL;
spin_unlock_irqrestore(&priv->lock, flags);
nouveau_gpuobj_ref(NULL, &chan->pushgpu);
nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma);
nouveau_namedb_destroy(&chan->base);
}
void
_nouveau_fifo_channel_dtor(struct nouveau_object *object)
{
struct nouveau_fifo_chan *chan = (void *)object;
nouveau_fifo_channel_destroy(chan);
}
u32
_nouveau_fifo_channel_rd32(struct nouveau_object *object, u64 addr)
{
struct nouveau_fifo_chan *chan = (void *)object;
return ioread32_native(chan->user + addr);
}
void
_nouveau_fifo_channel_wr32(struct nouveau_object *object, u64 addr, u32 data)
{
struct nouveau_fifo_chan *chan = (void *)object;
iowrite32_native(data, chan->user + addr);
}
static int
nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object)
{
int engidx = nv_hclass(priv) & 0xff;
while (object && object->parent) {
if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) &&
(nv_hclass(object->parent) & 0xff) == engidx)
return nouveau_fifo_chan(object)->chid;
object = object->parent;
}
return -1;
}
void
nouveau_fifo_destroy(struct nouveau_fifo *priv)
{
kfree(priv->channel);
nouveau_engine_destroy(&priv->base);
}
int
nouveau_fifo_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass,
int min, int max, int length, void **pobject)
{
struct nouveau_fifo *priv;
int ret;
ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO",
"fifo", length, pobject);
priv = *pobject;
if (ret)
return ret;
priv->min = min;
priv->max = max;
priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL);
if (!priv->channel)
return -ENOMEM;
priv->chid = nouveau_fifo_chid;
spin_lock_init(&priv->lock);
return 0;
}
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