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authoreytan lifshitz <eytan.lifshitz@intel.com>2013-06-18 14:28:56 +0300
committerJohannes Berg <johannes.berg@intel.com>2013-06-25 12:12:24 +0200
commitdafe6c4335d042fa6573f40795ccfadc4e4fc7c6 (patch)
tree140765aa5fa6cd92fc80f1f93a2d1f61c9f3a4c9 /drivers/net/wireless/iwlwifi/mvm
parente715c3a939071bacf33296b0b8dc58a29bbc5cf8 (diff)
iwlwifi: mvm: add thermal throttling debugging
Add prints visible to the user when entering and exiting thrermal throttling, because so users can tell that the NIC is getting too hot (and throughput will decrease.) Signed-off-by: eytan lifshitz <eytan.lifshitz@intel.com> Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/mvm.h2
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/tt.c22
2 files changed, 22 insertions, 2 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index 7d216ddecf4..1c6476eac49 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -352,12 +352,14 @@ struct iwl_tt_params {
* @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.
+ * @throttle: Is thermal throttling is active?
*/
struct iwl_mvm_tt_mgmt {
struct delayed_work ct_kill_exit;
bool dynamic_smps;
u32 tx_backoff;
const struct iwl_tt_params *params;
+ bool throttle;
};
struct iwl_mvm {
diff --git a/drivers/net/wireless/iwlwifi/mvm/tt.c b/drivers/net/wireless/iwlwifi/mvm/tt.c
index a7e3b8ddf22..d6ae7f16ac1 100644
--- a/drivers/net/wireless/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/iwlwifi/mvm/tt.c
@@ -427,6 +427,7 @@ void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
const struct iwl_tt_params *params = mvm->thermal_throttle.params;
struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
s32 temperature = mvm->temperature;
+ bool throttle_enable = false;
int i;
u32 tx_backoff;
@@ -445,6 +446,7 @@ void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_tt_smps_iterator, mvm);
+ throttle_enable = true;
} else if (tt->dynamic_smps &&
temperature <= params->dynamic_smps_exit) {
IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
@@ -456,10 +458,12 @@ void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
}
if (params->support_tx_protection) {
- if (temperature >= params->tx_protection_entry)
+ if (temperature >= params->tx_protection_entry) {
iwl_mvm_tt_tx_protection(mvm, true);
- else if (temperature <= params->tx_protection_exit)
+ throttle_enable = true;
+ } else if (temperature <= params->tx_protection_exit) {
iwl_mvm_tt_tx_protection(mvm, false);
+ }
}
if (params->support_tx_backoff) {
@@ -469,9 +473,22 @@ void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
break;
tx_backoff = params->tx_backoff[i].backoff;
}
+ if (tx_backoff != 0)
+ throttle_enable = true;
if (tt->tx_backoff != tx_backoff)
iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
}
+
+ if (!tt->throttle && throttle_enable) {
+ IWL_WARN(mvm,
+ "Due to high temperature thermal throttling initiated\n");
+ tt->throttle = true;
+ } else if (tt->throttle && !tt->dynamic_smps && tt->tx_backoff == 0 &&
+ temperature <= params->tx_protection_exit) {
+ IWL_WARN(mvm,
+ "Temperature is back to normal thermal throttling stopped\n");
+ tt->throttle = false;
+ }
}
static const struct iwl_tt_params iwl7000_tt_params = {
@@ -502,6 +519,7 @@ void iwl_mvm_tt_initialize(struct iwl_mvm *mvm)
IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
tt->params = &iwl7000_tt_params;
+ tt->throttle = false;
INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
}