[PATCH 2/3] drm/amdgpu: Fix RAS function interface

[Luben Tuikov]

The correctable and uncorrectable errors
are calculated at each invocation of this
function. Therefore, it is highly inefficient to
return just one of them based on a Boolean
input. If the caller wants both, twice the work
would be done. (And this work is O(n^3) on
Vega20.)

Fix this "interface" to simply return what it had
calculated--both values. Let the caller choose
what it wants to record, inspect, use.

Cc: Alexander Deucher <Alexander.Deucher at amd.com>
Cc: John Clements <john.clements at amd.com>
Cc: Hawking Zhang <Hawking.Zhang at amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov at amd.com>
Reviewed-by: Alexander Deucher <Alexander.Deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 23 +++++++++++++++--------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  5 +++--
 2 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index e3a4c3a7635a..ed3c43e8b0b5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1043,29 +1043,36 @@ int amdgpu_ras_error_inject(struct amdgpu_device *adev,
 }
 
 /* get the total error counts on all IPs */
-unsigned long amdgpu_ras_query_error_count(struct amdgpu_device *adev,
-		bool is_ce)
+void amdgpu_ras_query_error_count(struct amdgpu_device *adev,
+				  unsigned long *ce_count,
+				  unsigned long *ue_count)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_manager *obj;
-	struct ras_err_data data = {0, 0};
+	unsigned long ce, ue;
 
 	if (!adev->ras_enabled || !con)
-		return 0;
+		return;
 
+	ce = 0;
+	ue = 0;
 	list_for_each_entry(obj, &con->head, node) {
 		struct ras_query_if info = {
 			.head = obj->head,
 		};
 
 		if (amdgpu_ras_query_error_status(adev, &info))
-			return 0;
+			return;
 
-		data.ce_count += info.ce_count;
-		data.ue_count += info.ue_count;
+		ce += info.ce_count;
+		ue += info.ue_count;
 	}
 
-	return is_ce ? data.ce_count : data.ue_count;
+	if (ce_count)
+		*ce_count = ce;
+
+	if (ue_count)
+		*ue_count = ue;
 }
 /* query/inject/cure end */
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index bfa40c8ecc94..10fca0393106 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -485,8 +485,9 @@ int amdgpu_ras_request_reset_on_boot(struct amdgpu_device *adev,
 void amdgpu_ras_resume(struct amdgpu_device *adev);
 void amdgpu_ras_suspend(struct amdgpu_device *adev);
 
-unsigned long amdgpu_ras_query_error_count(struct amdgpu_device *adev,
-		bool is_ce);
+void amdgpu_ras_query_error_count(struct amdgpu_device *adev,
+				  unsigned long *ce_count,
+				  unsigned long *ue_count);
 
 /* error handling functions */
 int amdgpu_ras_add_bad_pages(struct amdgpu_device *adev,
-- 
2.31.1.527.g2d677e5b15