drm/amdgpu: store only one RAS bad page record for all pages in one row

So eeprom space can be saved, compatible with legacy way.

Signed-off-by: Tao Zhou <[e-mail]>
Reviewed-by: Hawking Zhang <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_err_handler_data *data;
 	struct amdgpu_ras_eeprom_control *control;
-	int save_count;
+	int save_count, unit_num, bad_page_num, i;
 
 	if (!con || !con->eh_data) {
 		if (new_cnt)
···
 	mutex_lock(&con->recovery_lock);
 	control = &con->eeprom_control;
 	data = con->eh_data;
-	save_count = data->count - control->ras_num_recs;
+	bad_page_num = control->ras_num_recs;
+	/* one record on eeprom stands for all pages in one memory row
+	 * in this mode
+	 */
+	if (control->rec_type == AMDGPU_RAS_EEPROM_REC_MCA)
+		bad_page_num = control->ras_num_recs * adev->umc.retire_unit;
+
+	save_count = data->count - bad_page_num;
 	mutex_unlock(&con->recovery_lock);
 
+	unit_num = save_count / adev->umc.retire_unit;
 	if (new_cnt)
-		*new_cnt = save_count / adev->umc.retire_unit;
+		*new_cnt = unit_num;
 
 	/* only new entries are saved */
 	if (save_count > 0) {
-		if (amdgpu_ras_eeprom_append(control,
-					     &data->bps[control->ras_num_recs],
-					     save_count)) {
-			dev_err(adev->dev, "Failed to save EEPROM table data!");
-			return -EIO;
+		if (control->rec_type == AMDGPU_RAS_EEPROM_REC_PA) {
+			if (amdgpu_ras_eeprom_append(control,
+						     &data->bps[control->ras_num_recs],
+						     save_count)) {
+				dev_err(adev->dev, "Failed to save EEPROM table data!");
+				return -EIO;
+			}
+		} else {
+			for (i = 0; i < unit_num; i++) {
+				if (amdgpu_ras_eeprom_append(control,
+						&data->bps[bad_page_num + i * adev->umc.retire_unit],
+						1)) {
+					dev_err(adev->dev, "Failed to save EEPROM table data!");
+					return -EIO;
+				}
+			}
 		}
 
 		dev_info(adev->dev, "Saved %d pages to EEPROM table.\n", save_count);