iwlwifi: mvm: allow to configure the timeout for the Tx queues

Sometimes we will want to configure the timeouts for the
Tx queues based on the vif type. Allow to do that using the
trigger mechanism.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

7 files changed, 80 insertions, 12 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
index 37b38a585dd1..46cbae8f821d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
@@ -250,6 +250,8 @@ iwl_fw_error_next_data(struct iwl_fw_error_dump_data *data)
  * @FW_DBG_TRIGGER_STATS: trigger log collection upon statistics threshold.
  * @FW_DBG_TRIGGER_RSSI: trigger log collection when the rssi of the beacon
  *	goes below a threshold.
+ * @FW_DBG_TRIGGER_TXQ_TIMERS: configures the timers for the Tx queue hang
+ *	detection.
  */
 enum iwl_fw_dbg_trigger {
 	FW_DBG_TRIGGER_INVALID = 0,
@@ -261,6 +263,7 @@ enum iwl_fw_dbg_trigger {
 	FW_DB_TRIGGER_RESERVED,
 	FW_DBG_TRIGGER_STATS,
 	FW_DBG_TRIGGER_RSSI,
+	FW_DBG_TRIGGER_TXQ_TIMERS,
 
 	/* must be last */
 	FW_DBG_TRIGGER_MAX,
diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
index 60f3f86904fb..0cfc66d1aef2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-file.h
@@ -579,6 +579,29 @@ struct iwl_fw_dbg_trigger_low_rssi {
 } __packed;
 
 /**
+ * struct iwl_fw_dbg_trigger_txq_timer - configures the Tx queue's timer
+ * @command_queue: timeout for the command queue in ms
+ * @bss: timeout for the queues of a BSS (except for TDLS queues) in ms
+ * @softap: timeout for the queues of a softAP in ms
+ * @p2p_go: timeout for the queues of a P2P GO in ms
+ * @p2p_client: timeout for the queues of a P2P client in ms
+ * @p2p_device: timeout for the queues of a P2P device in ms
+ * @ibss: timeout for the queues of an IBSS in ms
+ * @tdls: timeout for the queues of a TDLS station in ms
+ */
+struct iwl_fw_dbg_trigger_txq_timer {
+	__le32 command_queue;
+	__le32 bss;
+	__le32 softap;
+	__le32 p2p_go;
+	__le32 p2p_client;
+	__le32 p2p_device;
+	__le32 ibss;
+	__le32 tdls;
+	__le32 reserved[4];
+} __packed;
+
+/**
  * struct iwl_fw_dbg_conf_tlv - a TLV that describes a debug configuration.
  * @id: conf id
  * @usniffer: should the uSniffer image be used
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
index 581b3b8f29f9..09f0124db76e 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c
@@ -470,9 +470,8 @@ exit_fail:
 
 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 {
-	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
-					mvm->cfg->base_params->wd_timeout :
-					IWL_WATCHDOG_DISABLED;
+	unsigned int wdg_timeout =
+		iwl_mvm_get_wd_timeout(mvm, vif, false, false);
 	u32 ac;
 	int ret;
 
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index 91c74d4f0754..3513f27c888f 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -1480,7 +1480,9 @@ void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm);
 int iwl_mvm_fw_dbg_collect_trig(struct iwl_mvm *mvm,
 				struct iwl_fw_dbg_trigger_tlv *trigger,
 				const char *str, size_t len);
-
+unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
+				    struct ieee80211_vif *vif,
+				    bool tdls, bool cmd_q);
 static inline bool
 iwl_fw_dbg_trigger_vif_match(struct iwl_fw_dbg_trigger_tlv *trig,
 			     struct ieee80211_vif *vif)
diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c
index 91361be3ecd8..388886ce419d 100644
--- a/drivers/net/wireless/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/iwlwifi/mvm/ops.c
@@ -488,8 +488,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 
 	/* Set a short watchdog for the command queue */
 	trans_cfg.cmd_q_wdg_timeout =
-		iwlmvm_mod_params.tfd_q_hang_detect ? IWL_DEF_WD_TIMEOUT :
-						      IWL_WATCHDOG_DISABLED;
+		iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 
 	snprintf(mvm->hw->wiphy->fw_version,
 		 sizeof(mvm->hw->wiphy->fw_version),
diff --git a/drivers/net/wireless/iwlwifi/mvm/sta.c b/drivers/net/wireless/iwlwifi/mvm/sta.c
index 9bf512bdbbd6..231e7dd6c8f0 100644
--- a/drivers/net/wireless/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/iwlwifi/mvm/sta.c
@@ -209,9 +209,8 @@ static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 {
 	unsigned long used_hw_queues;
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
-	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
-					mvm->cfg->base_params->wd_timeout :
-					IWL_WATCHDOG_DISABLED;
+	unsigned int wdg_timeout =
+		iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 	u32 ac;
 
 	lockdep_assert_held(&mvm->mutex);
@@ -981,9 +980,8 @@ int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
-	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
-					mvm->cfg->base_params->wd_timeout :
-					IWL_WATCHDOG_DISABLED;
+	unsigned int wdg_timeout =
+		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
 	int queue, fifo, ret;
 	u16 ssn;
 
diff --git a/drivers/net/wireless/iwlwifi/mvm/utils.c b/drivers/net/wireless/iwlwifi/mvm/utils.c
index 435faee0a28e..593a810fe53e 100644
--- a/drivers/net/wireless/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/iwlwifi/mvm/utils.c
@@ -921,3 +921,47 @@ struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
 
 	return bss_iter_data.vif;
 }
+
+unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
+				    struct ieee80211_vif *vif,
+				    bool tdls, bool cmd_q)
+{
+	struct iwl_fw_dbg_trigger_tlv *trigger;
+	struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
+	unsigned int default_timeout =
+		cmd_q ? IWL_DEF_WD_TIMEOUT : mvm->cfg->base_params->wd_timeout;
+
+	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS))
+		return iwlmvm_mod_params.tfd_q_hang_detect ?
+			default_timeout : IWL_WATCHDOG_DISABLED;
+
+	trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
+	txq_timer = (void *)trigger->data;
+
+	if (tdls)
+		return le32_to_cpu(txq_timer->tdls);
+
+	if (cmd_q)
+		return le32_to_cpu(txq_timer->command_queue);
+
+	if (WARN_ON(!vif))
+		return default_timeout;
+
+	switch (ieee80211_vif_type_p2p(vif)) {
+	case NL80211_IFTYPE_ADHOC:
+		return le32_to_cpu(txq_timer->ibss);
+	case NL80211_IFTYPE_STATION:
+		return le32_to_cpu(txq_timer->bss);
+	case NL80211_IFTYPE_AP:
+		return le32_to_cpu(txq_timer->softap);
+	case NL80211_IFTYPE_P2P_CLIENT:
+		return le32_to_cpu(txq_timer->p2p_client);
+	case NL80211_IFTYPE_P2P_GO:
+		return le32_to_cpu(txq_timer->p2p_go);
+	case NL80211_IFTYPE_P2P_DEVICE:
+		return le32_to_cpu(txq_timer->p2p_device);
+	default:
+		WARN_ON(1);
+		return mvm->cfg->base_params->wd_timeout;
+	}
+}