Commit 49cc215a authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Add xe_gt_clock_interval_to_ms helper 



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: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarJonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611144053.2805091-6-matthew.brost@intel.com
parent 1bf1ca4e

drivers/gpu/drm/xe/xe_gt_clock.c

+20 −0
Original line number Diff line number Diff line
@@ -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);

}

drivers/gpu/drm/xe/xe_gt_clock.h

+1 −0
Original line number Diff line number Diff line
@@ -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