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gpu: host1x: External timeout/cancellation for fences

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Currently all fences have a 30 second timeout to ensure they are
cleaned up if the fence never completes otherwise. However, this
one size fits all solution doesn't actually fit in every case,
such as syncpoint waiting where we want to be able to have timeouts
longer than 30 seconds. As such, we want to be able to give control
over fence cancellation to the caller (and maybe eventually get rid
of the internal timeout altogether).

Here we add this cancellation mechanism by essentially adding a
function for entering the timeout path by function call, and changing
the syncpoint wait function to use it.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I4600544afe21efdd3f7d06362bd124130ddec3db
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2786637
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Mikko Perttunen
2022-09-21 12:51:55 +03:00
committed by Laxman Dewangan
parent 33a40367c0
commit 25f41bc212
5 changed files with 35 additions and 16 deletions
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4
drivers/gpu/host1x/syncpt.c
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@@ -236,11 +236,13 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
else if (timeout == 0)
return -EAGAIN;
fence = host1x_fence_create(sp, thresh);
fence = host1x_fence_create(sp, thresh, false);
if (IS_ERR(fence))
return PTR_ERR(fence);
wait_err = dma_fence_wait_timeout(fence, true, timeout);
if (wait_err == 0)
host1x_fence_cancel(fence);
dma_fence_put(fence);
if (value)