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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 "chan.h"
#include <core/client.h>
#include <engine/dma.h>
#include <nvif/class.h>
int
_nvkm_fifo_channel_ntfy(struct nvkm_object *object, u32 type,
struct nvkm_event **event)
{
struct nvkm_fifo *fifo = (void *)object->engine;
switch (type) {
case G82_CHANNEL_DMA_V0_NTFY_UEVENT:
if (nv_mclass(object) >= G82_CHANNEL_DMA) {
*event = &fifo->uevent;
return 0;
}
break;
default:
break;
}
return -EINVAL;
}
int
_nvkm_fifo_channel_map(struct nvkm_object *object, u64 *addr, u32 *size)
{
struct nvkm_fifo_chan *chan = (void *)object;
*addr = chan->addr;
*size = chan->size;
return 0;
}
u32
_nvkm_fifo_channel_rd32(struct nvkm_object *object, u64 addr)
{
struct nvkm_fifo_chan *chan = (void *)object;
if (unlikely(!chan->user)) {
chan->user = ioremap(chan->addr, chan->size);
if (WARN_ON_ONCE(chan->user == NULL))
return 0;
}
return ioread32_native(chan->user + addr);
}
void
_nvkm_fifo_channel_wr32(struct nvkm_object *object, u64 addr, u32 data)
{
struct nvkm_fifo_chan *chan = (void *)object;
if (unlikely(!chan->user)) {
chan->user = ioremap(chan->addr, chan->size);
if (WARN_ON_ONCE(chan->user == NULL))
return;
}
iowrite32_native(data, chan->user + addr);
}
void
nvkm_fifo_channel_destroy(struct nvkm_fifo_chan *chan)
{
struct nvkm_fifo *fifo = (void *)nv_object(chan)->engine;
unsigned long flags;
if (chan->user)
iounmap(chan->user);
spin_lock_irqsave(&fifo->lock, flags);
fifo->channel[chan->chid] = NULL;
spin_unlock_irqrestore(&fifo->lock, flags);
nvkm_gpuobj_del(&chan->pushgpu);
nvkm_namedb_destroy(&chan->namedb);
}
void
_nvkm_fifo_channel_dtor(struct nvkm_object *object)
{
struct nvkm_fifo_chan *chan = (void *)object;
nvkm_fifo_channel_destroy(chan);
}
int
nvkm_fifo_channel_create_(struct nvkm_object *parent,
struct nvkm_object *engine,
struct nvkm_oclass *oclass,
int bar, u32 addr, u32 size, u64 pushbuf,
u64 engmask, int len, void **ptr)
{
struct nvkm_client *client = nvkm_client(parent);
struct nvkm_fifo *fifo = (void *)engine;
struct nvkm_fifo_base *base = (void *)parent;
struct nvkm_fifo_chan *chan;
struct nvkm_subdev *subdev = &fifo->engine.subdev;
struct nvkm_device *device = subdev->device;
struct nvkm_dmaobj *dmaobj;
unsigned long flags;
int ret;
/* create base object class */
ret = nvkm_namedb_create_(parent, engine, oclass, 0, NULL,
engmask, len, ptr);
chan = *ptr;
if (ret)
return ret;
/* validate dma object representing push buffer */
if (pushbuf) {
dmaobj = nvkm_dma_search(device->dma, client, pushbuf);
if (!dmaobj)
return -ENOENT;
ret = nvkm_object_bind(&dmaobj->object, &base->gpuobj, 16,
&chan->pushgpu);
if (ret)
return ret;
}
/* find a free fifo channel */
spin_lock_irqsave(&fifo->lock, flags);
for (chan->chid = fifo->min; chan->chid < fifo->max; chan->chid++) {
if (!fifo->channel[chan->chid]) {
fifo->channel[chan->chid] = nv_object(chan);
break;
}
}
spin_unlock_irqrestore(&fifo->lock, flags);
if (chan->chid == fifo->max) {
nvkm_error(subdev, "no free channels\n");
return -ENOSPC;
}
chan->addr = nv_device_resource_start(device, bar) +
addr + size * chan->chid;
chan->size = size;
nvkm_event_send(&fifo->cevent, 1, 0, NULL, 0);
return 0;
}
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