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/*
* Copyright (C) 2007 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_dma.h"
static int
nouveau_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags);
/* DRM's channel always uses IRQs to signal fences */
if (class == dev_priv->channel.chan->id)
return 1;
/* Other channels don't use IRQs at all yet */
return 0;
}
static int
nouveau_fence_emit(struct drm_device *dev, uint32_t class, uint32_t flags,
uint32_t *breadcrumb, uint32_t *native_type)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_channel *chan = dev_priv->fifos[class];
struct nouveau_drm_channel *dchan = &dev_priv->channel;
DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags);
/* We can't emit fences on client channels, update sequence number
* and userspace will emit the fence
*/
*breadcrumb = ++chan->next_sequence;
*native_type = DRM_FENCE_TYPE_EXE;
if (chan != dchan->chan) {
DRM_DEBUG("user fence 0x%08x\n", *breadcrumb);
return 0;
}
DRM_DEBUG("emit 0x%08x\n", *breadcrumb);
BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_SET_REF, 1);
OUT_RING (*breadcrumb);
BEGIN_RING(NvSubM2MF, 0x0150, 1);
OUT_RING (0);
FIRE_RING ();
return 0;
}
static void
nouveau_fence_poll(struct drm_device *dev, uint32_t class, uint32_t waiting_types)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct drm_fence_class_manager *fc = &dev->fm.fence_class[class];
struct nouveau_channel *chan = dev_priv->fifos[class];
uint32_t pending_types = 0;
DRM_DEBUG("class=%d\n", class);
DRM_DEBUG("pending: 0x%08x 0x%08x\n", waiting_types, fc->waiting_types);
if (pending_types) {
uint32_t sequence = NV_READ(chan->ref_cnt);
DRM_DEBUG("got 0x%08x\n", sequence);
drm_fence_handler(dev, class, sequence, waiting_types, 0);
}
}
void
nouveau_fence_handler(struct drm_device *dev, int channel)
{
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[channel];
DRM_DEBUG("class=%d\n", channel);
write_lock(&fm->lock);
nouveau_fence_poll(dev, channel, fc->waiting_types);
write_unlock(&fm->lock);
}
struct drm_fence_driver nouveau_fence_driver = {
.num_classes = 8,
.wrap_diff = (1 << 30),
.flush_diff = (1 << 29),
.sequence_mask = 0xffffffffU,
.has_irq = nouveau_fence_has_irq,
.emit = nouveau_fence_emit,
.flush = NULL,
.poll = nouveau_fence_poll,
.needed_flush = NULL,
.wait = NULL
};
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