From: Gwan-gyeong Mun <gwan-gyeong....@intel.com>
Add xe_eu_attentions structure to capture and store eu attention bits.
Add a function to count the number of eu threads that have turned on from
eu attentions, and add a function to count the number of eu threads that
have changed on a state between eu attentions.
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong....@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
drivers/gpu/drm/xe/xe_gt_debug.c | 64 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/xe/xe_gt_debug.h | 15 ++++++++
2 files changed, 79 insertions(+)
diff --git a/drivers/gpu/drm/xe/xe_gt_debug.c b/drivers/gpu/drm/xe/xe_gt_debug.c
index 49f24db9da9c..a20e1e57212c 100644
--- a/drivers/gpu/drm/xe/xe_gt_debug.c
+++ b/drivers/gpu/drm/xe/xe_gt_debug.c
@@ -3,6 +3,7 @@
* Copyright © 2023 Intel Corporation
*/
+#include <linux/delay.h>
#include "regs/xe_gt_regs.h"
#include "xe_device.h"
#include "xe_force_wake.h"
@@ -146,3 +147,66 @@ int xe_gt_eu_threads_needing_attention(struct xe_gt *gt)
return err < 0 ? 0 : err;
}
+
+static inline unsigned int
+xe_eu_attentions_count(const struct xe_eu_attentions *a)
+{
+ return bitmap_weight((void *)a->att, a->size * BITS_PER_BYTE);
+}
+
+void xe_gt_eu_attentions_read(struct xe_gt *gt,
+ struct xe_eu_attentions *a,
+ const unsigned int settle_time_ms)
+{
+ unsigned int prev = 0;
+ ktime_t end, now;
+
+ now = ktime_get_raw();
+ end = ktime_add_ms(now, settle_time_ms);
+
+ a->ts = 0;
+ a->size = min_t(int,
+ xe_gt_eu_attention_bitmap_size(gt),
+ sizeof(a->att));
+
+ do {
+ unsigned int attn;
+
+ xe_gt_eu_attention_bitmap(gt, a->att, a->size);
+ attn = xe_eu_attentions_count(a);
+
+ now = ktime_get_raw();
+
+ if (a->ts == 0)
+ a->ts = now;
+ else if (attn && attn != prev)
+ a->ts = now;
+
+ prev = attn;
+
+ if (settle_time_ms)
+ udelay(5);
+
+ /*
+ * XXX We are gathering data for production SIP to find
+ * the upper limit of settle time. For now, we wait full
+ * timeout value regardless.
+ */
+ } while (ktime_before(now, end));
+}
+
+unsigned int xe_eu_attentions_xor_count(const struct xe_eu_attentions *a,
+ const struct xe_eu_attentions *b)
+{
+ unsigned int count = 0;
+ unsigned int i;
+
+ if (XE_WARN_ON(a->size != b->size))
+ return -EINVAL;
+
+ for (i = 0; i < a->size; i++)
+ if (a->att[i] ^ b->att[i])
+ count++;
+
+ return count;
+}
diff --git a/drivers/gpu/drm/xe/xe_gt_debug.h b/drivers/gpu/drm/xe/xe_gt_debug.h
index 1edb667154f1..1d50b93235ae 100644
--- a/drivers/gpu/drm/xe/xe_gt_debug.h
+++ b/drivers/gpu/drm/xe/xe_gt_debug.h
@@ -11,6 +11,15 @@
#define XE_GT_ATTENTION_TIMEOUT_MS 100
+struct xe_eu_attentions {
+#define XE_MAX_EUS 1024
+#define XE_MAX_THREADS 10
+
+ u8 att[DIV_ROUND_UP(XE_MAX_EUS * XE_MAX_THREADS, BITS_PER_BYTE)];
+ unsigned int size;
+ ktime_t ts;
+};
+
static inline unsigned int xe_gt_debug_eu_att_rows(struct xe_gt *gt)
{
return (GRAPHICS_VERx100(gt_to_xe(gt)) >= 3000) ? 4u : 2u;
@@ -28,4 +37,10 @@ int xe_gt_eu_attention_bitmap_size(struct xe_gt *gt);
int xe_gt_eu_attention_bitmap(struct xe_gt *gt, u8 *bits,
unsigned int bitmap_size);
+void xe_gt_eu_attentions_read(struct xe_gt *gt,
+ struct xe_eu_attentions *a,
+ const unsigned int settle_time_ms);
+
+unsigned int xe_eu_attentions_xor_count(const struct xe_eu_attentions *a,
+ const struct xe_eu_attentions *b);
#endif
--
2.43.0
