drm/amdgpu: Warn when bad pages approaches 90% threshold

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@amd.com>
Cc: Mukul Joshi <Mukul.Joshi@amd.com>
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c

@@ -1077,6 +1077,13 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
 		if (res)
 			DRM_ERROR("RAS table incorrect checksum or error:%d\n",
 				  res);
+
+		/* Warn if we are at 90% of the threshold or above
+		 */
+		if (10 * control->ras_num_recs >= 9 * ras->bad_page_cnt_threshold)
+			dev_warn(adev->dev, "RAS records:%u exceeds 90%% of threshold:%d",
+					control->ras_num_recs,
+					ras->bad_page_cnt_threshold);
 	} else if (hdr->header == RAS_TABLE_HDR_BAD &&
 		   amdgpu_bad_page_threshold != 0) {
 		res = __verify_ras_table_checksum(control);