Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/xe: Move exponential sleep logic to helper
We want to reuse the same increased sleep logic in other places.
To avoid code duplication, move it to the helper.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260127193727.601-3-michal.wajdeczko@intel.com
+22
-4
+1
-4
drivers/gpu/drm/xe/xe_guc_submit.c
+1
-4
drivers/gpu/drm/xe/xe_guc_submit.c
···
1049
1049
return -ENODEV;
1050
1050
}
1051
1051
1052
-
msleep(sleep_period_ms);
1053
-
sleep_total_ms += sleep_period_ms;
1054
-
if (sleep_period_ms < 64)
1055
-
sleep_period_ms <<= 1;
1052
+
sleep_total_ms += xe_sleep_exponential_ms(&sleep_period_ms, 64);
1056
1053
goto try_again;
1057
1054
}
1058
1055
}
+21
drivers/gpu/drm/xe/xe_sleep.h
+21
drivers/gpu/drm/xe/xe_sleep.h
···
33
33
usleep_range(min_us, max_us);
34
34
}
35
35
36
+
/**
37
+
* xe_sleep_exponential_ms() - Sleep for a exponentially increased time.
38
+
* @sleep_period_ms: current time in msec to sleep
39
+
* @max_sleep_ms: maximum time in msec to sleep
40
+
*
41
+
* Sleep for the @sleep_period_ms and exponentially increase this time for the
42
+
* next loop, unless reaching the @max_sleep_ms limit.
43
+
*
44
+
* Return: approximate time in msec the task was delayed.
45
+
*/
46
+
static inline unsigned int xe_sleep_exponential_ms(unsigned int *sleep_period_ms,
47
+
unsigned int max_sleep_ms)
48
+
{
49
+
unsigned int delay_ms = *sleep_period_ms;
50
+
unsigned int next_delay_ms = 2 * delay_ms;
51
+
52
+
xe_sleep_relaxed_ms(delay_ms);
53
+
*sleep_period_ms = min(next_delay_ms, max_sleep_ms);
54
+
return delay_ms;
55
+
}
56
+
36
57
#endif