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gpu: host1x: Timestamp syncpoint wait completions

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Collect CLOCK_MONOTONIC timestamps in the interrupt handler when
a syncpoint wait completes, and report it back in dma_fences and
syncpoint wait UAPI.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I9f783833698df7d96c99c9ffef3205aa82adceb5
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2801167
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Mikko Perttunen
2022-11-01 12:01:19 +02:00
committed by Laxman Dewangan
parent f6865a3c2d
commit a351c7681e
7 changed files with 40 additions and 11 deletions
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28
drivers/gpu/host1x/syncpt.c
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@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/dma-fence.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>
#include <trace/events/host1x.h>
@@ -211,14 +212,15 @@ int host1x_syncpt_incr(struct host1x_syncpt *sp)
EXPORT_SYMBOL(host1x_syncpt_incr);
/**
* host1x_syncpt_wait() - wait for a syncpoint to reach a given value
* host1x_syncpt_wait_ts() - wait for a syncpoint to reach a given value
* @sp: host1x syncpoint
* @thresh: threshold
* @timeout: maximum time to wait for the syncpoint to reach the given value
* @value: return location for the syncpoint value
* @ts: return location for completion timestamp
*/
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
u32 *value)
int host1x_syncpt_wait_ts(struct host1x_syncpt *sp, u32 thresh, long timeout, u32 *value,
ktime_t *ts)
{
struct dma_fence *fence;
long wait_err;
@@ -227,6 +229,8 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
if (value)
*value = host1x_syncpt_load(sp);
if (ts)
*ts = ktime_get();
if (host1x_syncpt_is_expired(sp, thresh))
return 0;
@@ -243,10 +247,13 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
wait_err = dma_fence_wait_timeout(fence, true, timeout);
if (wait_err == 0)
host1x_fence_cancel(fence);
dma_fence_put(fence);
if (value)
*value = host1x_syncpt_load(sp);
if (ts)
*ts = fence->timestamp;
dma_fence_put(fence);
if (wait_err == 0)
return -EAGAIN;
@@ -255,6 +262,19 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
else
return 0;
}
EXPORT_SYMBOL(host1x_syncpt_wait_ts);
/**
* host1x_syncpt_wait() - wait for a syncpoint to reach a given value
* @sp: host1x syncpoint
* @thresh: threshold
* @timeout: maximum time to wait for the syncpoint to reach the given value
* @value: return location for the syncpoint value
*/
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout, u32 *value)
{
return host1x_syncpt_wait_ts(sp, thresh, timeout, value, NULL);
}
EXPORT_SYMBOL(host1x_syncpt_wait);
/*