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drm/xe: Add xe_gt_clock_interval_to_ms helper

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Add helper to convert GT clock ticks to msec. Useful for determining if
timeouts occur by examing GT clock ticks.

v6:
- s/nom/n , s/dom/d (Jonathan)
- include math64 (CI)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611144053.2805091-6-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2024-06-11 07:40:47 -07:00
parent 1bf1ca4e32
commit 49cc215aad
2 changed files with 21 additions and 0 deletions
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20
drivers/gpu/drm/xe/xe_gt_clock.c
View File

@ -3,6 +3,8 @@
* Copyright © 2022 Intel Corporation
*/
#include <linux/math64.h>
#include "xe_gt_clock.h"
#include "regs/xe_gt_regs.h"
@ -79,3 +81,21 @@ int xe_gt_clock_init(struct xe_gt *gt)
gt->info.reference_clock = freq;
return 0;
}
static u64 div_u64_roundup(u64 n, u32 d)
{
return div_u64(n + d - 1, d);
}
/**
* xe_gt_clock_interval_to_ms - Convert sampled GT clock ticks to msec
*
* @gt: the &xe_gt
* @count: count of GT clock ticks
*
* Returns: time in msec
*/
u64 xe_gt_clock_interval_to_ms(struct xe_gt *gt, u64 count)
{
return div_u64_roundup(count * MSEC_PER_SEC, gt->info.reference_clock);
}

1
drivers/gpu/drm/xe/xe_gt_clock.h
View File

@ -11,5 +11,6 @@
struct xe_gt;
int xe_gt_clock_init(struct xe_gt *gt);
u64 xe_gt_clock_interval_to_ms(struct xe_gt *gt, u64 count);
#endif