Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e820c2da authored by Haim Dreyfuss's avatar Haim Dreyfuss Committed by Emmanuel Grumbach
Browse files

iwlwifi: mvm: Add support for Energy based scan (EBS) 



This patch enables Energy Based Scan (EBS) - intended to detect energy
on 5 GHz band channels. Passive scan on this band takes up to 2.64 sec
assuming 110mSec per-channel * 24 channels. EBS is designed to detect
energy on channels with intensive Wifi activity as well as those where
only beacons are transmitted. EBS completes sampling all channels within
shortest beacon frame transmission time. Total EBS duration is about 100
msec (typical beacon interval).
Detecting Wifi activity on 5 GHz band channels can significantly reduce
scan duration thus saving time and power. EBS failure reported by FW
disables EBS for current connection. It is re-enabled upon new
connection attempt on any WLAN interface.

Signed-off-by: default avatarHaim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: default avatarAlexander Bondar <alexander.bondar@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent ae397472

drivers/net/wireless/iwlwifi/iwl-fw.h

+2 −0
Original line number Diff line number Diff line
@@ -91,6 +91,7 @@ 
 * @IWL_UCODE_TLV_FLAGS_P2P_PS_UAPSD: P2P client supports uAPSD power save

 * @IWL_UCODE_TLV_FLAGS_BCAST_FILTERING: uCode supports broadcast filtering.

 * @IWL_UCODE_TLV_FLAGS_GO_UAPSD: AP/GO interfaces support uAPSD clients

 * @IWL_UCODE_TLV_FLAGS_EBS_SUPPORT: this uCode image supports EBS.

 */

enum iwl_ucode_tlv_flag {

	IWL_UCODE_TLV_FLAGS_PAN			= BIT(0),
@@ -106,6 +107,7 @@ enum iwl_ucode_tlv_flag { 
	IWL_UCODE_TLV_FLAGS_P2P_PM		= BIT(21),

	IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM	= BIT(22),

	IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_SCM	= BIT(23),

	IWL_UCODE_TLV_FLAGS_EBS_SUPPORT		= BIT(25),

	IWL_UCODE_TLV_FLAGS_P2P_PS_UAPSD	= BIT(26),

	IWL_UCODE_TLV_FLAGS_BCAST_FILTERING	= BIT(29),

	IWL_UCODE_TLV_FLAGS_GO_UAPSD		= BIT(30),

drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h

+14 −4
Original line number Diff line number Diff line
@@ -538,13 +538,16 @@ struct iwl_scan_offload_schedule { 
 *

 * IWL_SCAN_OFFLOAD_FLAG_PASS_ALL: pass all results - no filtering.

 * IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL: add cached channels to partial scan.

 * IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN: use energy based scan before partial scan

 *	on A band.

 * IWL_SCAN_OFFLOAD_FLAG_EBS_QUICK_MODE: EBS duration is 100mSec - typical

 *	beacon period. Finding channel activity in this mode is not guaranteed.

 * IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE: EBS duration is 200mSec.

 *	Assuming beacon period is 100ms finding channel activity is guaranteed.

 */

enum iwl_scan_offload_flags {

	IWL_SCAN_OFFLOAD_FLAG_PASS_ALL		= BIT(0),

	IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL	= BIT(2),

	IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN	= BIT(3),

	IWL_SCAN_OFFLOAD_FLAG_EBS_QUICK_MODE	= BIT(5),

	IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE	= BIT(6),

};



/**
@@ -567,17 +570,24 @@ enum iwl_scan_offload_compleate_status { 
	IWL_SCAN_OFFLOAD_ABORTED	= 2,

};



enum iwl_scan_ebs_status {

	IWL_SCAN_EBS_SUCCESS,

	IWL_SCAN_EBS_FAILED,

	IWL_SCAN_EBS_CHAN_NOT_FOUND,

};



/**

 * iwl_scan_offload_complete - SCAN_OFFLOAD_COMPLETE_NTF_API_S_VER_1

 * @last_schedule_line:		last schedule line executed (fast or regular)

 * @last_schedule_iteration:	last scan iteration executed before scan abort

 * @status:			enum iwl_scan_offload_compleate_status

 * @ebs_status: last EBS status, see IWL_SCAN_EBS_*

 */

struct iwl_scan_offload_complete {

	u8 last_schedule_line;

	u8 last_schedule_iteration;

	u8 status;

	u8 reserved;

	u8 ebs_status;

} __packed;



/**

drivers/net/wireless/iwlwifi/mvm/fw-api.h

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ 
#include "fw-api-power.h"

#include "fw-api-d3.h"

#include "fw-api-coex.h"

#include "fw-api-scan.h"



/* maximal number of Tx queues in any platform */

#define IWL_MVM_MAX_QUEUES	20

drivers/net/wireless/iwlwifi/mvm/mac80211.c

+5 −0
Original line number Diff line number Diff line
@@ -1694,6 +1694,11 @@ static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw, 
		ret = iwl_mvm_add_sta(mvm, vif, sta);

	} else if (old_state == IEEE80211_STA_NONE &&

		   new_state == IEEE80211_STA_AUTH) {

		/*

		 * EBS may be disabled due to previous failures reported by FW.

		 * Reset EBS status here assuming environment has been changed.

		 */

		mvm->last_ebs_successful = true;

		ret = 0;

	} else if (old_state == IEEE80211_STA_AUTH &&

		   new_state == IEEE80211_STA_ASSOC) {

drivers/net/wireless/iwlwifi/mvm/mvm.h

+2 −0
Original line number Diff line number Diff line
@@ -535,6 +535,8 @@ struct iwl_mvm { 
	/* Internal station */

	struct iwl_mvm_int_sta aux_sta;



	bool last_ebs_successful;



	u8 scan_last_antenna_idx; /* to toggle TX between antennas */

	u8 mgmt_last_antenna_idx;