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drm/nouveau: Provide a means to have arbitrary work run on fence completion. 

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-09-21 20:49:39 +02:00 committed by Ben Skeggs
parent 2730723bbc
commit 8ac3891b48
2 changed files with 33 additions and 0 deletions
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3
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -1243,6 +1243,9 @@ extern void nouveau_fence_update(struct nouveau_channel *);
extern int nouveau_fence_new(struct nouveau_channel *, struct nouveau_fence **,
bool emit);
extern int nouveau_fence_emit(struct nouveau_fence *);
extern void nouveau_fence_work(struct nouveau_fence *fence,
void (*work)(void *priv, bool signalled),
void *priv);
struct nouveau_channel *nouveau_fence_channel(struct nouveau_fence *);
extern bool nouveau_fence_signalled(void *obj, void *arg);
extern int nouveau_fence_wait(void *obj, void *arg, bool lazy, bool intr);

30
drivers/gpu/drm/nouveau/nouveau_fence.c
View File

@ -39,6 +39,9 @@ struct nouveau_fence {
uint32_t sequence;
bool signalled;
void (*work)(void *priv, bool signalled);
void *priv;
};
static inline struct nouveau_fence *
@ -78,6 +81,10 @@ nouveau_fence_update(struct nouveau_channel *chan)
sequence = fence->sequence;
fence->signalled = true;
list_del(&fence->entry);
if (unlikely(fence->work))
fence->work(fence->priv, true);
kref_put(&fence->refcount, nouveau_fence_del);
if (sequence == chan->fence.sequence_ack)
@ -147,6 +154,25 @@ nouveau_fence_emit(struct nouveau_fence *fence)
return 0;
}
void
nouveau_fence_work(struct nouveau_fence *fence,
void (*work)(void *priv, bool signalled),
void *priv)
{
BUG_ON(fence->work);
spin_lock(&fence->channel->fence.lock);
if (fence->signalled) {
work(priv, true);
} else {
fence->work = work;
fence->priv = priv;
}
spin_unlock(&fence->channel->fence.lock);
}
void
nouveau_fence_unref(void **sync_obj)
{
@ -268,6 +294,10 @@ nouveau_fence_channel_fini(struct nouveau_channel *chan)
list_for_each_entry_safe(fence, tmp, &chan->fence.pending, entry) {
fence->signalled = true;
list_del(&fence->entry);
if (unlikely(fence->work))
fence->work(fence->priv, false);
kref_put(&fence->refcount, nouveau_fence_del);
}
}