[PATCH 1/4] drm/amdgpu: Warn when bad pages approaches threshold

[Kent Russell]

Currently dmesg doesn't warn when the number of bad pages approaches the
threshold for page retirement. WARN when the number of bad pages
is at 90% or greater for easier checks and planning, instead of waiting
until the GPU is full of bad pages

Cc: Luben Tuikov <luben.tuikov at amd.com>
Cc: Mukul Joshi <Mukul.Joshi at amd.com>
Signed-off-by: Kent Russell <kent.russell at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
index 98732518543e..8270aad23a06 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
@@ -1077,6 +1077,16 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
 		if (res)
 			DRM_ERROR("RAS table incorrect checksum or error:%d\n",
 				  res);
+
+		/* threshold = -1 is automatic, threshold = 0 means that page
+		 * retirement is disabled.
+		 */
+		if (amdgpu_bad_page_threshold > 0 &&
+		    control->ras_num_recs >= 0 &&
+		    control->ras_num_recs >= (amdgpu_bad_page_threshold * 9 / 10))
+			DRM_WARN("RAS records:%u approaching threshold:%d",
+					control->ras_num_recs,
+					amdgpu_bad_page_threshold);
 	} else if (hdr->header == RAS_TABLE_HDR_BAD &&
 		   amdgpu_bad_page_threshold != 0) {
 		res = __verify_ras_table_checksum(control);
-- 
2.25.1