Commit 56e6d568 authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Add clearing stats to GT debugfs 



It helpful to clear GT stats, run a test cases which is being profiled,
and look at the results of the stats from the individual test case. Make
stats entry writable and upon write clear the stats.

v5:
 - Drop clear_stats debugfs entry (Lucas)
v6:
 - Use xe_gt_stats_clear rather than helper (Michal)
 - Rework loop in xe_gt_stats_clear (Michal)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://lore.kernel.org/r/20250829172232.1308004-2-matthew.brost@intel.com
parent 8d6f16f1

drivers/gpu/drm/xe/xe_gt_debugfs.c

+19 −1
Original line number Diff line number Diff line
@@ -327,7 +327,6 @@ static const struct drm_info_list vf_safe_debugfs_list[] = { 
	{"default_lrc_bcs", .show = xe_gt_debugfs_simple_show, .data = bcs_default_lrc},

	{"default_lrc_vcs", .show = xe_gt_debugfs_simple_show, .data = vcs_default_lrc},

	{"default_lrc_vecs", .show = xe_gt_debugfs_simple_show, .data = vecs_default_lrc},

	{"stats", .show = xe_gt_debugfs_simple_show, .data = xe_gt_stats_print_info},

	{"hwconfig", .show = xe_gt_debugfs_simple_show, .data = hwconfig},

};
@@ -363,6 +362,24 @@ static ssize_t write_to_gt_call(const char __user *userbuf, size_t count, loff_t 
	return count;

}



static ssize_t stats_write(struct file *file, const char __user *userbuf,

			   size_t count, loff_t *ppos)

{

	struct seq_file *s = file->private_data;

	struct xe_gt *gt = s->private;



	return write_to_gt_call(userbuf, count, ppos, xe_gt_stats_clear, gt);

}



static int stats_show(struct seq_file *s, void *unused)

{

	struct drm_printer p = drm_seq_file_printer(s);

	struct xe_gt *gt = s->private;



	return xe_gt_stats_print_info(gt, &p);

}

DEFINE_SHOW_STORE_ATTRIBUTE(stats);



static void force_reset(struct xe_gt *gt)

{

	struct xe_device *xe = gt_to_xe(gt);
@@ -448,6 +465,7 @@ void xe_gt_debugfs_register(struct xe_gt *gt) 
	root->d_inode->i_private = gt;



	/* VF safe */

	debugfs_create_file("stats", 0600, root, gt, &stats_fops);

	debugfs_create_file("force_reset", 0600, root, gt, &force_reset_fops);

	debugfs_create_file("force_reset_sync", 0600, root, gt, &force_reset_sync_fops);

drivers/gpu/drm/xe/xe_gt_stats.c

+14 −0
Original line number Diff line number Diff line
@@ -50,3 +50,17 @@ int xe_gt_stats_print_info(struct xe_gt *gt, struct drm_printer *p) 


	return 0;

}



/**

 * xe_gt_stats_clear - Clear the GT stats

 * @gt: GT structure

 *

 * This clear (zeros) all the available GT stats.

 */

void xe_gt_stats_clear(struct xe_gt *gt)

{

	int id;



	for (id = 0; id < ARRAY_SIZE(gt->stats.counters); ++id)

		atomic64_set(&gt->stats.counters[id], 0);

}

drivers/gpu/drm/xe/xe_gt_stats.h

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ struct drm_printer; 


#ifdef CONFIG_DEBUG_FS

int xe_gt_stats_print_info(struct xe_gt *gt, struct drm_printer *p);

void xe_gt_stats_clear(struct xe_gt *gt);

void xe_gt_stats_incr(struct xe_gt *gt, const enum xe_gt_stats_id id, int incr);

#else

static inline void