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/iwl-8000.c b/drivers/net/wireless/iwlwifi/iwl-8000.c
index 3c576ee..c1ef165 100644
--- a/drivers/net/wireless/iwlwifi/iwl-8000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-8000.c
@@ -144,6 +144,7 @@
.nvm_calib_ver = IWL8000_TX_POWER_VERSION,
.default_nvm_file = DEFAULT_NVM_FILE_FAMILY_8000,
.max_rx_agg_size = MAX_RX_AGG_SIZE_8260_SDIO,
+ .disable_dummy_notification = true,
};
MODULE_FIRMWARE(IWL8000_MODULE_FIRMWARE(IWL8000_UCODE_API_OK));
diff --git a/drivers/net/wireless/iwlwifi/iwl-config.h b/drivers/net/wireless/iwlwifi/iwl-config.h
index 1b9c77d..687e9e1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-config.h
+++ b/drivers/net/wireless/iwlwifi/iwl-config.h
@@ -282,6 +282,7 @@
bool no_power_up_nic_in_init;
const char *default_nvm_file;
unsigned int max_rx_agg_size;
+ bool disable_dummy_notification;
};
/*
diff --git a/drivers/net/wireless/iwlwifi/iwl-fw.h b/drivers/net/wireless/iwlwifi/iwl-fw.h
index f68cba4e0..62c46eb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-fw.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw.h
@@ -127,6 +127,7 @@
* @IWL_UCODE_TLV_API_CSA_FLOW: ucode can do unbind-bind flow for CSA.
* @IWL_UCODE_TLV_API_DISABLE_STA_TX: ucode supports tx_disable bit.
* @IWL_UCODE_TLV_API_LMAC_SCAN: This ucode uses LMAC unified scan API.
+ * @IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF: ucode supports disabling dummy notif.
* @IWL_UCODE_TLV_API_FRAGMENTED_SCAN: This ucode supports active dwell time
* longer than the passive one, which is essential for fragmented scan.
*/
@@ -137,6 +138,7 @@
IWL_UCODE_TLV_API_CSA_FLOW = BIT(4),
IWL_UCODE_TLV_API_DISABLE_STA_TX = BIT(5),
IWL_UCODE_TLV_API_LMAC_SCAN = BIT(6),
+ IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF = BIT(7),
IWL_UCODE_TLV_API_FRAGMENTED_SCAN = BIT(8),
};
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.