iwlwifi: mvm: allow preventing dummy notifications
The firwmare now allows the driver to disable dummy
notifications. These notifications sent by the firmware
are an overhead for slow buses. They are still useful for
fast buses.
Add a hardware switch to prevent these notifications only
on devices that work on slow buses.
Signed-off-by: Eran <eran.harary@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/iwlwifi/mvm/fw-api.h
index 541b844..b599b52 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api.h
@@ -1601,6 +1601,8 @@
#define SF_LONG_DELAY_AGING_TIMER 1000000 /* 1 Sec */
+#define SF_CFG_DUMMY_NOTIF_OFF BIT(16)
+
/**
* Smart Fifo configuration command.
* @state: smart fifo state, types listed in enum %iwl_sf_sate.
diff --git a/drivers/net/wireless/iwlwifi/mvm/sf.c b/drivers/net/wireless/iwlwifi/mvm/sf.c
index f88410c..7eb78e2 100644
--- a/drivers/net/wireless/iwlwifi/mvm/sf.c
+++ b/drivers/net/wireless/iwlwifi/mvm/sf.c
@@ -179,6 +179,10 @@
struct ieee80211_sta *sta;
int ret = 0;
+ if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF &&
+ mvm->cfg->disable_dummy_notification)
+ sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
+
/*
* If an associated AP sta changed its antenna configuration, the state
* will remain FULL_ON but SF parameters need to be reconsidered.