wifi: iwlwifi: add STATUS_FW_ERROR API

Add iwl_trans_notify_fw_error() and iwl_trans_is_fw_error() for use by
op modes. These helpers provide a clean interface for marking and
checking firmware error state. This hides the trans internal
implementation details from callers.

Signed-off-by: Rotem Kerem <[email protected]>
Signed-off-by: Miri Korenblit <[email protected]>
Link: https://patch.msgid.link/20250909061931.23f5160b3265.Iba325ffa4c6c6f7fc3a702fb6c1827b0857d0db3@changeid

Author: rotemkerem

drivers/net/wireless/intel/iwlwifi/fw/dbg.c

@@ -830,7 +830,7 @@ iwl_fw_error_dump_file(struct iwl_fw_runtime *fwrt,
 	}
 
 	/* reading RXF/TXF sizes */
-	if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status)) {
+	if (iwl_trans_is_fw_error(fwrt->trans)) {
 		fifo_len = iwl_fw_rxf_len(fwrt, mem_cfg);
 		fifo_len += iwl_fw_txf_len(fwrt, mem_cfg);
 
@@ -3116,7 +3116,7 @@ static void iwl_send_dbg_dump_complete_cmd(struct iwl_fw_runtime *fwrt,
 		.len[0] = sizeof(hcmd_data),
 	};
 
-	if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status))
+	if (iwl_trans_is_fw_error(fwrt->trans))
 		return;
 
 	if (fw_has_capa(&fwrt->fw->ucode_capa,

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -1209,6 +1209,20 @@ static inline bool iwl_trans_is_dead(struct iwl_trans *trans)
 	return test_bit(STATUS_TRANS_DEAD, &trans->status);
 }
 
+static inline bool iwl_trans_is_fw_error(struct iwl_trans *trans)
+{
+	return test_bit(STATUS_FW_ERROR, &trans->status);
+}
+
+/*
+ * This function notifies the transport layer of firmware error, the recovery
+ * will be handled by the op mode
+ */
+static inline void iwl_trans_notify_fw_error(struct iwl_trans *trans)
+{
+	trans->state = IWL_TRANS_NO_FW;
+	set_bit(STATUS_FW_ERROR, &trans->status);
+}
 /*****************************************************
  * PCIe handling
  *****************************************************/

drivers/net/wireless/intel/iwlwifi/mld/d3.c

@@ -1213,8 +1213,7 @@ static int iwl_mld_wait_d3_notif(struct iwl_mld *mld,
 	ret = iwl_trans_d3_resume(mld->trans, false);
 	if (ret) {
 		/* Avoid sending commands if the FW is dead */
-		mld->trans->state = IWL_TRANS_NO_FW;
-		set_bit(STATUS_FW_ERROR, &mld->trans->status);
+		iwl_trans_notify_fw_error(mld->trans);
 		iwl_remove_notification(&mld->notif_wait, &wait_d3_notif);
 		return ret;
 	}
@@ -1267,8 +1266,7 @@ int iwl_mld_no_wowlan_suspend(struct iwl_mld *mld)
 	if (ret) {
 		IWL_ERR(mld, "d3 suspend: trans_d3_suspend failed %d\n", ret);
 		/* We are going to stop the FW. Avoid sending commands in that flow */
-		mld->trans->state = IWL_TRANS_NO_FW;
-		set_bit(STATUS_FW_ERROR, &mld->trans->status);
+		iwl_trans_notify_fw_error(mld->trans);
 	} else {
 		/* Async notification might send hcmds, which is not allowed in suspend */
 		iwl_mld_cancel_async_notifications(mld);

drivers/net/wireless/intel/iwlwifi/mvm/d3.c

@@ -3102,7 +3102,7 @@ static int __iwl_mvm_resume(struct iwl_mvm *mvm)
 
 	rt_status = iwl_mvm_check_rt_status(mvm, vif);
 	if (rt_status != FW_ALIVE) {
-		set_bit(STATUS_FW_ERROR, &mvm->trans->status);
+		iwl_trans_notify_fw_error(mvm->trans);
 		if (rt_status == FW_ERROR) {
 			IWL_ERR(mvm, "FW Error occurred during suspend. Restarting.\n");
 			iwl_mvm_dump_nic_error_log(mvm);
@@ -3272,7 +3272,7 @@ int iwl_mvm_fast_resume(struct iwl_mvm *mvm)
 
 	rt_status = iwl_mvm_check_rt_status(mvm, NULL);
 	if (rt_status != FW_ALIVE) {
-		set_bit(STATUS_FW_ERROR, &mvm->trans->status);
+		iwl_trans_notify_fw_error(mvm->trans);
 		if (rt_status == FW_ERROR) {
 			IWL_ERR(mvm,
 				"iwl_mvm_check_rt_status failed, device is gone during suspend\n");
@@ -3284,7 +3284,6 @@ int iwl_mvm_fast_resume(struct iwl_mvm *mvm)
 						&iwl_dump_desc_assert,
 						false, 0);
 		}
-		mvm->trans->state = IWL_TRANS_NO_FW;
 		ret = -ENODEV;
 
 		goto out;

drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/trans.c

@@ -3539,7 +3539,7 @@ iwl_trans_pcie_dump_data(struct iwl_trans *trans, u32 dump_mask,
 	struct iwl_trans_dump_data *dump_data;
 	u32 len, num_rbs = 0, monitor_len = 0;
 	int i, ptr;
-	bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
+	bool dump_rbs = iwl_trans_is_fw_error(trans) &&
 			!trans->mac_cfg->mq_rx_supported &&
 			dump_mask & BIT(IWL_FW_ERROR_DUMP_RB);