iwlwifi: mvm: add CT-KILL notification

Up to today the driver was notified of the temperature from the FW
and decided whether to enter CT-kill or not.
From now on, the FW will decide when to enter CT-kill and will notify
the driver.
Add support for this notification.

Signed-off-by: Chaya Rachel Ivgi <chaya.rachel.ivgi@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

5 files changed, 61 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
index e2dbc67a367b..724a3eef78b1 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-fw-file.h
@@ -318,6 +318,9 @@ typedef unsigned int __bitwise__ iwl_ucode_tlv_capa_t;
  * @IWL_UCODE_TLV_CAPA_BEACON_STORING: firmware will store the latest beacon
  *      from AP and will send it upon d0i3 exit.
  * @IWL_UCODE_TLV_CAPA_LAR_SUPPORT_V2: support LAR API V2
+ * @IWL_UCODE_TLV_CAPA_CT_KILL_BY_FW: firmware responsible for CT-kill
+ * @IWL_UCODE_TLV_CAPA_TEMP_THS_REPORT_SUPPORT: supports temperature
+ *      thresholds reporting
  *
  * @NUM_IWL_UCODE_TLV_CAPA: number of bits used
  */
@@ -351,6 +354,8 @@ enum iwl_ucode_tlv_capa {
         IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION         = (__force iwl_ucode_tlv_capa_t)71,
         IWL_UCODE_TLV_CAPA_BEACON_STORING               = (__force iwl_ucode_tlv_capa_t)72,
         IWL_UCODE_TLV_CAPA_LAR_SUPPORT_V2               = (__force iwl_ucode_tlv_capa_t)73,
+        IWL_UCODE_TLV_CAPA_CT_KILL_BY_FW                = (__force iwl_ucode_tlv_capa_t)74,
+        IWL_UCODE_TLV_CAPA_TEMP_THS_REPORT_SUPPORT      = (__force iwl_ucode_tlv_capa_t)75,
 
         NUM_IWL_UCODE_TLV_CAPA
 #ifdef __CHECKER__
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
index f332497e29d1..ecbf7cb600ce 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
@@ -279,6 +279,7 @@ enum {
  */
 enum iwl_phy_ops_subcmd_ids {
         CMD_DTS_MEASUREMENT_TRIGGER_WIDE = 0x0,
+        CT_KILL_NOTIFICATION = 0xFE,
         DTS_MEASUREMENT_NOTIF_WIDE = 0xFF,
 };
 
@@ -1685,6 +1686,17 @@ struct iwl_dts_measurement_notif {
         __le32 voltage;
 } __packed; /* TEMPERATURE_MEASUREMENT_TRIGGER_NTFY_S */
 
+/**
+ * struct ct_kill_notif - CT-kill entry notification
+ *
+ * @temperature: the current temperature in celsius
+ * @reserved: reserved
+ */
+struct ct_kill_notif {
+        __le16 temperature;
+        __le16 reserved;
+} __packed; /* GRP_PHY_CT_KILL_NTF */
+
 /***********************************
  * TDLS API
  ***********************************/
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index ebe37bb0ce4c..200bbb76ff0a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016        Intel Deutschland GmbH
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -33,6 +34,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016        Intel Deutschland GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1028,6 +1030,18 @@ static inline bool iwl_mvm_has_new_rx_api(struct iwl_mvm *mvm)
                            IWL_UCODE_TLV_CAPA_MULTI_QUEUE_RX_SUPPORT);
 }
 
+static inline bool iwl_mvm_is_tt_in_fw(struct iwl_mvm *mvm)
+{
+        /* these two TLV are redundant since the responsibility to CT-kill by
+         * FW happens only after we send at least one command of
+         * temperature THs report.
+         */
+        return fw_has_capa(&mvm->fw->ucode_capa,
+                           IWL_UCODE_TLV_CAPA_CT_KILL_BY_FW) &&
+               fw_has_capa(&mvm->fw->ucode_capa,
+                           IWL_UCODE_TLV_CAPA_TEMP_THS_REPORT_SUPPORT);
+}
+
 extern const u8 iwl_mvm_ac_to_tx_fifo[];
 
 struct iwl_rate_info {
@@ -1502,6 +1516,7 @@ void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff);
 void iwl_mvm_tt_exit(struct iwl_mvm *mvm);
 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state);
 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp);
+void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 
 /* Location Aware Regulatory */
 struct iwl_mcc_update_resp *
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 09a94a5efb61..ecc371e1f3f0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -263,6 +263,8 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
         RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
                        iwl_mvm_temp_notif, true),
+        RX_HANDLER_GRP(PHY_OPS_GROUP, CT_KILL_NOTIFICATION,
+                       iwl_mvm_ct_kill_notif, false),
 
         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
                    true),
@@ -387,6 +389,7 @@ static const struct iwl_hcmd_names iwl_mvm_legacy_names[] = {
  */
 static const struct iwl_hcmd_names iwl_mvm_phy_names[] = {
         HCMD_NAME(CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
+        HCMD_NAME(CT_KILL_NOTIFICATION),
         HCMD_NAME(DTS_MEASUREMENT_NOTIF_WIDE),
 };
 
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index 758d05a8c6aa..6ba391099d7e 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -33,7 +34,7 @@
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
- * Copyright(c) 2015 Intel Deutschland GmbH
+ * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -171,6 +172,24 @@ void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
         iwl_mvm_tt_temp_changed(mvm, temp);
 }
 
+void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct ct_kill_notif *notif;
+        int len = iwl_rx_packet_payload_len(pkt);
+
+        if (WARN_ON_ONCE(len != sizeof(*notif))) {
+                IWL_ERR(mvm, "Invalid CT_KILL_NOTIFICATION\n");
+                return;
+        }
+
+        notif = (struct ct_kill_notif *)pkt->data;
+        IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
+                       notif->temperature);
+
+        iwl_mvm_enter_ctkill(mvm);
+}
+
 static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
 {
         struct iwl_dts_measurement_cmd cmd = {
@@ -236,6 +255,12 @@ static void check_exit_ctkill(struct work_struct *work)
         tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
         mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
 
+        if (iwl_mvm_is_tt_in_fw(mvm)) {
+                iwl_mvm_exit_ctkill(mvm);
+
+                return;
+        }
+
         duration = tt->params.ct_kill_duration;
 
         mutex_lock(&mvm->mutex);