iwlwifi: mvm: add thermal throttling and CT kill

In order to avoid NIC destruction due to high temperature,
CT kill will power down the NIC.

To avoid this, thermal throttling will decrease throughput
to prevent the NIC from reaching the temperature at which
CT kill is performed.

Signed-off-by: Eytan Lifshitz <eytan.lifshitz@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 95 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index 4e87a321e107..a288552491b3 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -150,6 +150,12 @@ enum iwl_power_scheme {
 
 #define IWL_CONN_MAX_LISTEN_INTERVAL    70
 
+enum iwl_mvm_smps_type_request {
+        IWL_MVM_SMPS_REQ_BT_COEX,
+        IWL_MVM_SMPS_REQ_TT,
+        NUM_IWL_MVM_SMPS_REQ,
+};
+
 /**
  * struct iwl_mvm_vif - data per Virtual Interface, it is a MAC context
  * @id: between 0 and 3
@@ -164,6 +170,8 @@ enum iwl_power_scheme {
  * @bcast_sta: station used for broadcast packets. Used by the following
  *  vifs: P2P_DEVICE, GO and AP.
  * @beacon_skb: the skb used to hold the AP/GO beacon template
+ * @smps_requests: the requests of of differents parts of the driver, regard
+        the desired smps mode.
  */
 struct iwl_mvm_vif {
         u16 id;
@@ -218,6 +226,8 @@ struct iwl_mvm_vif {
         struct dentry *dbgfs_slink;
         void *dbgfs_data;
 #endif
+
+        enum ieee80211_smps_mode smps_requests[NUM_IWL_MVM_SMPS_REQ];
 };
 
 static inline struct iwl_mvm_vif *
@@ -226,12 +236,6 @@ iwl_mvm_vif_from_mac80211(struct ieee80211_vif *vif)
         return (void *)vif->drv_priv;
 }
 
-enum iwl_mvm_status {
-        IWL_MVM_STATUS_HW_RFKILL,
-        IWL_MVM_STATUS_ROC_RUNNING,
-        IWL_MVM_STATUS_IN_HW_RESTART,
-};
-
 enum iwl_scan_status {
         IWL_MVM_SCAN_NONE,
         IWL_MVM_SCAN_OS,
@@ -249,6 +253,63 @@ struct iwl_nvm_section {
         const u8 *data;
 };
 
+/*
+ * Tx-backoff threshold
+ * @temperature: The threshold in Celsius
+ * @backoff: The tx-backoff in uSec
+ */
+struct iwl_tt_tx_backoff {
+        s32 temperature;
+        u32 backoff;
+};
+
+#define TT_TX_BACKOFF_SIZE 6
+
+/**
+ * struct iwl_tt_params - thermal throttling parameters
+ * @ct_kill_entry: CT Kill entry threshold
+ * @ct_kill_exit: CT Kill exit threshold
+ * @ct_kill_duration: The time  intervals (in uSec) in which the driver needs
+ *      to checks whether to exit CT Kill.
+ * @dynamic_smps_entry: Dynamic SMPS entry threshold
+ * @dynamic_smps_exit: Dynamic SMPS exit threshold
+ * @tx_protection_entry: TX protection entry threshold
+ * @tx_protection_exit: TX protection exit threshold
+ * @tx_backoff: Array of thresholds for tx-backoff , in ascending order.
+ * @support_ct_kill: Support CT Kill?
+ * @support_dynamic_smps: Support dynamic SMPS?
+ * @support_tx_protection: Support tx protection?
+ * @support_tx_backoff: Support tx-backoff?
+ */
+struct iwl_tt_params {
+        s32 ct_kill_entry;
+        s32 ct_kill_exit;
+        u32 ct_kill_duration;
+        s32 dynamic_smps_entry;
+        s32 dynamic_smps_exit;
+        s32 tx_protection_entry;
+        s32 tx_protection_exit;
+        struct iwl_tt_tx_backoff tx_backoff[TT_TX_BACKOFF_SIZE];
+        bool support_ct_kill;
+        bool support_dynamic_smps;
+        bool support_tx_protection;
+        bool support_tx_backoff;
+};
+
+/**
+ * struct iwl_mvm_tt_mgnt - Thermal Throttling Management structure
+ * @ct_kill_exit: worker to exit thermal kill
+ * @dynamic_smps: Is thermal throttling enabled dynamic_smps?
+ * @tx_backoff: The current thremal throttling tx backoff in uSec.
+ * @params: Parameters to configure the thermal throttling algorithm.
+ */
+struct iwl_mvm_tt_mgmt {
+        struct delayed_work ct_kill_exit;
+        bool dynamic_smps;
+        u32 tx_backoff;
+        const struct iwl_tt_params *params;
+};
+
 struct iwl_mvm {
         /* for logger access */
         struct device *dev;
@@ -356,6 +417,10 @@ struct iwl_mvm {
         /* BT-Coex */
         u8 bt_kill_msk;
         struct iwl_bt_coex_profile_notif last_bt_notif;
+
+        /* Thermal Throttling and CTkill */
+        struct iwl_mvm_tt_mgmt thermal_throttle;
+        s32 temperature;        /* Celsius */
 };
 
 /* Extract MVM priv from op_mode and _hw */
@@ -365,6 +430,19 @@ struct iwl_mvm {
 #define IWL_MAC80211_GET_MVM(_hw)                       \
         IWL_OP_MODE_GET_MVM((struct iwl_op_mode *)((_hw)->priv))
 
+enum iwl_mvm_status {
+        IWL_MVM_STATUS_HW_RFKILL,
+        IWL_MVM_STATUS_HW_CTKILL,
+        IWL_MVM_STATUS_ROC_RUNNING,
+        IWL_MVM_STATUS_IN_HW_RESTART,
+};
+
+static inline bool iwl_mvm_is_radio_killed(struct iwl_mvm *mvm)
+{
+        return test_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status) ||
+               test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
+}
+
 extern const u8 iwl_mvm_ac_to_tx_fifo[];
 
 struct iwl_rate_info {
@@ -555,4 +633,15 @@ int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
                                   struct ieee80211_vif *vif);
 
+/* SMPS */
+void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
+                                enum iwl_mvm_smps_type_request req_type,
+                                enum ieee80211_smps_mode smps_request);
+
+/* Thermal management and CT-kill */
+void iwl_mvm_tt_handler(struct iwl_mvm *mvm);
+void iwl_mvm_tt_initialize(struct iwl_mvm *mvm);
+void iwl_mvm_tt_exit(struct iwl_mvm *mvm);
+void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state);
+
 #endif /* __IWL_MVM_H__ */