iwlwifi: add dump collection in case alive flow fails

Trigger dump collection if the alive flow fails, regardless of the
reason.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

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

@@ -973,6 +973,30 @@ const struct iwl_fw_dump_desc iwl_dump_desc_assert = {
 };
 IWL_EXPORT_SYMBOL(iwl_dump_desc_assert);
 
+void iwl_fw_alive_error_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);
+
+	if (!iwl_dump_desc_no_alive)
+		return;
+
+	iwl_dump_desc_no_alive->trig_desc.type =
+		cpu_to_le32(FW_DBG_TRIGGER_NO_ALIVE);
+	iwl_dump_desc_no_alive->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);
+
+	fwrt->dump.desc = iwl_dump_desc_no_alive;
+	iwl_fw_error_dump(fwrt);
+	clear_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status);
+}
+IWL_EXPORT_SYMBOL(iwl_fw_alive_error_dump);
+
 int iwl_fw_dbg_collect_desc(struct iwl_fw_runtime *fwrt,
 			    const struct iwl_fw_dump_desc *desc,
 			    const struct iwl_fw_dbg_trigger_tlv *trigger)
@@ -998,7 +1022,8 @@ 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))
+	if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status) ||
+	    test_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status))
 		return -EBUSY;
 
 	if (WARN_ON(fwrt->dump.desc))

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

@@ -368,4 +368,5 @@ static inline void iwl_fw_resume_timestamp(struct iwl_fw_runtime *fwrt) {}
 
 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 
+void iwl_fw_alive_error_dump(struct iwl_fw_runtime *fwrt);
 #endif  /* __iwl_fw_dbg_h__ */

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

@@ -328,6 +328,7 @@ 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
  */
 enum iwl_fw_dbg_trigger {
 	FW_DBG_TRIGGER_INVALID = 0,
@@ -345,6 +346,7 @@ enum iwl_fw_dbg_trigger {
 	FW_DBG_TRIGGER_TX_LATENCY,
 	FW_DBG_TRIGGER_TDLS,
 	FW_DBG_TRIGGER_TX_STATUS,
+	FW_DBG_TRIGGER_NO_ALIVE,
 
 	/* must be last */
 	FW_DBG_TRIGGER_MAX,

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

@@ -88,6 +88,7 @@ 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

@@ -299,6 +299,7 @@ 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,
@@ -369,6 +370,7 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 		atomic_set(&mvm->mac80211_queue_stop_count[i], 0);
 
 	set_bit(IWL_MVM_STATUS_FIRMWARE_RUNNING, &mvm->status);
+	clear_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &mvm->fwrt.status);
 
 	return 0;
 }

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

@@ -788,6 +788,8 @@ 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);