iwlwifi: differentiate between alive timeout and alive flow failure

There are two cases that can cause the alive flow to fail,
an assert or a timeout.
Currently we mask any incoming asserts when we wait for alive.

Solve this by differentiating between the two cases:
1. Let the regular error handling to handle a received assert
2. Do a dump collection in the case of a timeout
Signed-off-by: NShahar S Matityahu <shahar.s.matityahu@intel.com>
Fixes: f38efdb2 ("iwlwifi: add dump collection in case alive flow fails")
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>

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

@@ -1373,29 +1373,35 @@ void iwl_fw_assert_error_dump(struct iwl_fw_runtime *fwrt)
 }
 IWL_EXPORT_SYMBOL(iwl_fw_assert_error_dump);
 
-void iwl_fw_alive_error_dump(struct iwl_fw_runtime *fwrt)
+void iwl_fw_alive_timeout_dump(struct iwl_fw_runtime *fwrt)
 {
-	struct iwl_fw_dump_desc *iwl_dump_desc_no_alive =
-		kmalloc(sizeof(*iwl_dump_desc_no_alive), GFP_KERNEL);
+	struct iwl_fw_dump_desc *iwl_dump_desc_alive_timeout;
 
-	if (!iwl_dump_desc_no_alive)
+	if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status))
 		return;
 
-	iwl_dump_desc_no_alive->trig_desc.type =
-		cpu_to_le32(FW_DBG_TRIGGER_NO_ALIVE);
-	iwl_dump_desc_no_alive->len = 0;
+	iwl_dump_desc_alive_timeout =
+		kmalloc(sizeof(*iwl_dump_desc_alive_timeout), GFP_KERNEL);
+	if (!iwl_dump_desc_alive_timeout)
+		return;
+
+	iwl_dump_desc_alive_timeout->trig_desc.type =
+		cpu_to_le32(FW_DBG_TRIGGER_ALIVE_TIMEOUT);
+	iwl_dump_desc_alive_timeout->len = 0;
 
 	if (WARN_ON(fwrt->dump.desc))
 		iwl_fw_free_dump_desc(fwrt);
 
 	IWL_WARN(fwrt, "Collecting data: trigger %d fired.\n",
-		 FW_DBG_TRIGGER_NO_ALIVE);
+		 FW_DBG_TRIGGER_ALIVE_TIMEOUT);
+
+	/* set STATUS_FW_ERROR to collect all memory regions. */
+	set_bit(STATUS_FW_ERROR, &fwrt->trans->status);
 
-	fwrt->dump.desc = iwl_dump_desc_no_alive;
+	fwrt->dump.desc = iwl_dump_desc_alive_timeout;
 	iwl_fw_error_dump(fwrt);
-	clear_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status);
 }
-IWL_EXPORT_SYMBOL(iwl_fw_alive_error_dump);
+IWL_EXPORT_SYMBOL(iwl_fw_alive_timeout_dump);
 
 int iwl_fw_dbg_collect_desc(struct iwl_fw_runtime *fwrt,
 			    const struct iwl_fw_dump_desc *desc,
@@ -1418,8 +1424,7 @@ int iwl_fw_dbg_collect_desc(struct iwl_fw_runtime *fwrt,
 	    fwrt->smem_cfg.num_lmacs)
 		return -EIO;
 
-	if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status) ||
-	    test_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status))
+	if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status))
 		return -EBUSY;
 
 	if (WARN_ON(fwrt->dump.desc))

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

@@ -435,7 +435,7 @@ static inline void iwl_fw_resume_timestamp(struct iwl_fw_runtime *fwrt) {}
 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 
 void iwl_fw_assert_error_dump(struct iwl_fw_runtime *fwrt);
-void iwl_fw_alive_error_dump(struct iwl_fw_runtime *fwrt);
+void iwl_fw_alive_timeout_dump(struct iwl_fw_runtime *fwrt);
 void iwl_fw_dbg_collect_sync(struct iwl_fw_runtime *fwrt);
 void iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
 			    enum iwl_fw_ini_apply_point apply_point);

drivers/net/wireless/intel/iwlwifi/fw/error-dump.h

@@ -355,7 +355,7 @@ iwl_fw_error_next_data(struct iwl_fw_error_dump_data *data)
  * @FW_DBG_TDLS: trigger log collection upon TDLS related events.
  * @FW_DBG_TRIGGER_TX_STATUS: trigger log collection upon tx status when
  *  the firmware sends a tx reply.
- * @FW_DBG_TRIGGER_NO_ALIVE: trigger log collection if alive flow fails
+ * @FW_DBG_TRIGGER_ALIVE_TIMEOUT: trigger log collection if alive flow timeouts
  */
 enum iwl_fw_dbg_trigger {
 	FW_DBG_TRIGGER_INVALID = 0,
@@ -373,7 +373,7 @@ enum iwl_fw_dbg_trigger {
 	FW_DBG_TRIGGER_TX_LATENCY,
 	FW_DBG_TRIGGER_TDLS,
 	FW_DBG_TRIGGER_TX_STATUS,
-	FW_DBG_TRIGGER_NO_ALIVE,
+	FW_DBG_TRIGGER_ALIVE_TIMEOUT,
 
 	/* must be last */
 	FW_DBG_TRIGGER_MAX,

drivers/net/wireless/intel/iwlwifi/fw/runtime.h

@@ -90,7 +90,6 @@ struct iwl_fwrt_shared_mem_cfg {
 
 enum iwl_fw_runtime_status {
 	IWL_FWRT_STATUS_DUMPING = 0,
-	IWL_FWRT_STATUS_WAIT_ALIVE,
 };
 
 /**

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

@@ -299,7 +299,6 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 	enum iwl_ucode_type old_type = mvm->fwrt.cur_fw_img;
 	static const u16 alive_cmd[] = { MVM_ALIVE };
 
-	set_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &mvm->fwrt.status);
 	if (ucode_type == IWL_UCODE_REGULAR &&
 	    iwl_fw_dbg_conf_usniffer(mvm->fw, FW_DBG_START_FROM_ALIVE) &&
 	    !(fw_has_capa(&mvm->fw->ucode_capa,
@@ -332,6 +331,9 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 	if (ret) {
 		struct iwl_trans *trans = mvm->trans;
 
+		if (ret == -ETIMEDOUT)
+			iwl_fw_alive_timeout_dump(&mvm->fwrt);
+
 		if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000)
 			IWL_ERR(mvm,
 				"SecBoot CPU1 Status: 0x%x, CPU2 Status: 0x%x\n",
@@ -377,7 +379,6 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 	iwl_fw_set_dbg_rec_on(&mvm->fwrt);
 #endif
-	clear_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &mvm->fwrt.status);
 
 	return 0;
 }

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

@@ -818,8 +818,6 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 	mutex_lock(&mvm->mutex);
 	iwl_mvm_ref(mvm, IWL_MVM_REF_INIT_UCODE);
 	err = iwl_run_init_mvm_ucode(mvm, true);
-	if (test_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &mvm->fwrt.status))
-		iwl_fw_alive_error_dump(&mvm->fwrt);
 	if (!iwlmvm_mod_params.init_dbg || !err)
 		iwl_mvm_stop_device(mvm);
 	iwl_mvm_unref(mvm, IWL_MVM_REF_INIT_UCODE);