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

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications 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
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/

#ifndef __fw_api_scan_h__
#define __fw_api_scan_h__

#include "fw-api.h"

/* Scan Commands, Responses, Notifications */

/* Masks for iwl_scan_channel.type flags */
#define SCAN_CHANNEL_TYPE_ACTIVE	BIT(0)
#define SCAN_CHANNEL_NARROW_BAND	BIT(22)

/* Max number of IEs for direct SSID scans in a command */
#define PROBE_OPTION_MAX		20

/**
 * struct iwl_scan_channel - entry in REPLY_SCAN_CMD channel table
 * @channel: band is selected by iwl_scan_cmd "flags" field
 * @tx_gain: gain for analog radio
 * @dsp_atten: gain for DSP
 * @active_dwell: dwell time for active scan in TU, typically 5-50
 * @passive_dwell: dwell time for passive scan in TU, typically 20-500
 * @type: type is broken down to these bits:
 *	bit 0: 0 = passive, 1 = active
 *	bits 1-20: SSID direct bit map. If any of these bits is set then
 *		the corresponding SSID IE is transmitted in probe request
 *		(bit i adds IE in position i to the probe request)
 *	bit 22: channel width, 0 = regular, 1 = TGj narrow channel
 *
 * @iteration_count:
 * @iteration_interval:
 * This struct is used once for each channel in the scan list.
 * Each channel can independently select:
 * 1)  SSID for directed active scans
 * 2)  Txpower setting (for rate specified within Tx command)
 * 3)  How long to stay on-channel (behavior may be modified by quiet_time,
 *     quiet_plcp_th, good_CRC_th)
 *
 * To avoid uCode errors, make sure the following are true (see comments
 * under struct iwl_scan_cmd about max_out_time and quiet_time):
 * 1)  If using passive_dwell (i.e. passive_dwell != 0):
 *     active_dwell <= passive_dwell (< max_out_time if max_out_time != 0)
 * 2)  quiet_time <= active_dwell
 * 3)  If restricting off-channel time (i.e. max_out_time !=0):
 *     passive_dwell < max_out_time
 *     active_dwell < max_out_time
 */
struct iwl_scan_channel {
	__le32 type;
	__le16 channel;
	__le16 iteration_count;
	__le32 iteration_interval;
	__le16 active_dwell;
	__le16 passive_dwell;
} __packed; /* SCAN_CHANNEL_CONTROL_API_S_VER_1 */

/**
 * struct iwl_ssid_ie - directed scan network information element
 *
 * Up to 20 of these may appear in REPLY_SCAN_CMD,
 * selected by "type" bit field in struct iwl_scan_channel;
 * each channel may select different ssids from among the 20 entries.
 * SSID IEs get transmitted in reverse order of entry.
 */
struct iwl_ssid_ie {
	u8 id;
	u8 len;
	u8 ssid[IEEE80211_MAX_SSID_LEN];
} __packed; /* SCAN_DIRECT_SSID_IE_API_S_VER_1 */

/**
 * iwl_scan_flags - masks for scan command flags
 *@SCAN_FLAGS_PERIODIC_SCAN:
 *@SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX:
 *@SCAN_FLAGS_DELAYED_SCAN_LOWBAND:
 *@SCAN_FLAGS_DELAYED_SCAN_HIGHBAND:
 *@SCAN_FLAGS_FRAGMENTED_SCAN:
 *@SCAN_FLAGS_PASSIVE2ACTIVE: use active scan on channels that was active
 *	in the past hour, even if they are marked as passive.
 */
enum iwl_scan_flags {
	SCAN_FLAGS_PERIODIC_SCAN		= BIT(0),
	SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX	= BIT(1),
	SCAN_FLAGS_DELAYED_SCAN_LOWBAND		= BIT(2),
	SCAN_FLAGS_DELAYED_SCAN_HIGHBAND	= BIT(3),
	SCAN_FLAGS_FRAGMENTED_SCAN		= BIT(4),
	SCAN_FLAGS_PASSIVE2ACTIVE		= BIT(5),
};

/**
 * enum iwl_scan_type - Scan types for scan command
 * @SCAN_TYPE_FORCED:
 * @SCAN_TYPE_BACKGROUND:
 * @SCAN_TYPE_OS:
 * @SCAN_TYPE_ROAMING:
 * @SCAN_TYPE_ACTION:
 * @SCAN_TYPE_DISCOVERY:
 * @SCAN_TYPE_DISCOVERY_FORCED:
 */
enum iwl_scan_type {
	SCAN_TYPE_FORCED		= 0,
	SCAN_TYPE_BACKGROUND		= 1,
	SCAN_TYPE_OS			= 2,
	SCAN_TYPE_ROAMING		= 3,
	SCAN_TYPE_ACTION		= 4,
	SCAN_TYPE_DISCOVERY		= 5,
	SCAN_TYPE_DISCOVERY_FORCED	= 6,
}; /* SCAN_ACTIVITY_TYPE_E_VER_1 */

/**
 * struct iwl_scan_cmd - scan request command
 * ( SCAN_REQUEST_CMD = 0x80 )
 * @len: command length in bytes
 * @scan_flags: scan flags from SCAN_FLAGS_*
 * @channel_count: num of channels in channel list
 *	(1 - ucode_capa.n_scan_channels)
 * @quiet_time: in msecs, dwell this time for active scan on quiet channels
 * @quiet_plcp_th: quiet PLCP threshold (channel is quiet if less than
 *	this number of packets were received (typically 1)
 * @passive2active: is auto switching from passive to active during scan allowed
 * @rxchain_sel_flags: RXON_RX_CHAIN_*
 * @max_out_time: in TUs, max out of serving channel time
 * @suspend_time: how long to pause scan when returning to service channel:
 *	bits 0-19: beacon interal in TUs (suspend before executing)
 *	bits 20-23: reserved
 *	bits 24-31: number of beacons (suspend between channels)
 * @rxon_flags: RXON_FLG_*
 * @filter_flags: RXON_FILTER_*
 * @tx_cmd: for active scans (zero for passive), w/o payload,
 *	no RS so specify TX rate
 * @direct_scan: direct scan SSIDs
 * @type: one of SCAN_TYPE_*
 * @repeats: how many time to repeat the scan
 */
struct iwl_scan_cmd {
	__le16 len;
	u8 scan_flags;
	u8 channel_count;
	__le16 quiet_time;
	__le16 quiet_plcp_th;
	__le16 passive2active;
	__le16 rxchain_sel_flags;
	__le32 max_out_time;
	__le32 suspend_time;
	/* RX_ON_FLAGS_API_S_VER_1 */
	__le32 rxon_flags;
	__le32 filter_flags;
	struct iwl_tx_cmd tx_cmd;
	struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
	__le32 type;
	__le32 repeats;

	/*
	 * Probe request frame, followed by channel list.
	 *
	 * Size of probe request frame is specified by byte count in tx_cmd.
	 * Channel list follows immediately after probe request frame.
	 * Number of channels in list is specified by channel_count.
	 * Each channel in list is of type:
	 *
	 * struct iwl_scan_channel channels[0];
	 *
	 * NOTE:  Only one band of channels can be scanned per pass.  You
	 * must not mix 2.4GHz channels and 5.2GHz channels, and you must wait
	 * for one scan to complete (i.e. receive SCAN_COMPLETE_NOTIFICATION)
	 * before requesting another scan.
	 */
	u8 data[0];
} __packed; /* SCAN_REQUEST_FIXED_PART_API_S_VER_5 */

/* Response to scan request contains only status with one of these values */
#define SCAN_RESPONSE_OK	0x1
#define SCAN_RESPONSE_ERROR	0x2

/*
 * SCAN_ABORT_CMD = 0x81
 * When scan abort is requested, the command has no fields except the common
 * header. The response contains only a status with one of these values.
 */
#define SCAN_ABORT_POSSIBLE	0x1
#define SCAN_ABORT_IGNORED	0x2 /* no pending scans */

/* TODO: complete documentation */
#define  SCAN_OWNER_STATUS 0x1
#define  MEASURE_OWNER_STATUS 0x2

/**
 * struct iwl_scan_start_notif - notifies start of scan in the device
 * ( SCAN_START_NOTIFICATION = 0x82 )
 * @tsf_low: TSF timer (lower half) in usecs
 * @tsf_high: TSF timer (higher half) in usecs
 * @beacon_timer: structured as follows:
 *	bits 0:19 - beacon interval in usecs
 *	bits 20:23 - reserved (0)
 *	bits 24:31 - number of beacons
 * @channel: which channel is scanned
 * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
 * @status: one of *_OWNER_STATUS
 */
struct iwl_scan_start_notif {
	__le32 tsf_low;
	__le32 tsf_high;
	__le32 beacon_timer;
	u8 channel;
	u8 band;
	u8 reserved[2];
	__le32 status;
} __packed; /* SCAN_START_NTF_API_S_VER_1 */

/* scan results probe_status first bit indicates success */
#define SCAN_PROBE_STATUS_OK		0
#define SCAN_PROBE_STATUS_TX_FAILED	BIT(0)
/* error statuses combined with TX_FAILED */
#define SCAN_PROBE_STATUS_FAIL_TTL	BIT(1)
#define SCAN_PROBE_STATUS_FAIL_BT	BIT(2)

/* How many statistics are gathered for each channel */
#define SCAN_RESULTS_STATISTICS 1

/**
 * enum iwl_scan_complete_status - status codes for scan complete notifications
 * @SCAN_COMP_STATUS_OK:  scan completed successfully
 * @SCAN_COMP_STATUS_ABORT: scan was aborted by user
 * @SCAN_COMP_STATUS_ERR_SLEEP: sending null sleep packet failed
 * @SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT: timeout before channel is ready
 * @SCAN_COMP_STATUS_ERR_PROBE: sending probe request failed
 * @SCAN_COMP_STATUS_ERR_WAKEUP: sending null wakeup packet failed
 * @SCAN_COMP_STATUS_ERR_ANTENNAS: invalid antennas chosen at scan command
 * @SCAN_COMP_STATUS_ERR_INTERNAL: internal error caused scan abort
 * @SCAN_COMP_STATUS_ERR_COEX: medium was lost ot WiMax
 * @SCAN_COMP_STATUS_P2P_ACTION_OK: P2P public action frame TX was successful
 *	(not an error!)
 * @SCAN_COMP_STATUS_ITERATION_END: indicates end of one repeatition the driver
 *	asked for
 * @SCAN_COMP_STATUS_ERR_ALLOC_TE: scan could not allocate time events
*/
enum iwl_scan_complete_status {
	SCAN_COMP_STATUS_OK = 0x1,
	SCAN_COMP_STATUS_ABORT = 0x2,
	SCAN_COMP_STATUS_ERR_SLEEP = 0x3,
	SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT = 0x4,
	SCAN_COMP_STATUS_ERR_PROBE = 0x5,
	SCAN_COMP_STATUS_ERR_WAKEUP = 0x6,
	SCAN_COMP_STATUS_ERR_ANTENNAS = 0x7,
	SCAN_COMP_STATUS_ERR_INTERNAL = 0x8,
	SCAN_COMP_STATUS_ERR_COEX = 0x9,
	SCAN_COMP_STATUS_P2P_ACTION_OK = 0xA,
	SCAN_COMP_STATUS_ITERATION_END = 0x0B,
	SCAN_COMP_STATUS_ERR_ALLOC_TE = 0x0C,
};

/**
 * struct iwl_scan_results_notif - scan results for one channel
 * ( SCAN_RESULTS_NOTIFICATION = 0x83 )
 * @channel: which channel the results are from
 * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
 * @probe_status: SCAN_PROBE_STATUS_*, indicates success of probe request
 * @num_probe_not_sent: # of request that weren't sent due to not enough time
 * @duration: duration spent in channel, in usecs
 * @statistics: statistics gathered for this channel
 */
struct iwl_scan_results_notif {
	u8 channel;
	u8 band;
	u8 probe_status;
	u8 num_probe_not_sent;
	__le32 duration;
	__le32 statistics[SCAN_RESULTS_STATISTICS];
} __packed; /* SCAN_RESULT_NTF_API_S_VER_2 */

/**
 * struct iwl_scan_complete_notif - notifies end of scanning (all channels)
 * ( SCAN_COMPLETE_NOTIFICATION = 0x84 )
 * @scanned_channels: number of channels scanned (and number of valid results)
 * @status: one of SCAN_COMP_STATUS_*
 * @bt_status: BT on/off status
 * @last_channel: last channel that was scanned
 * @tsf_low: TSF timer (lower half) in usecs
 * @tsf_high: TSF timer (higher half) in usecs
 * @results: array of scan results, only "scanned_channels" of them are valid
 */
struct iwl_scan_complete_notif {
	u8 scanned_channels;
	u8 status;
	u8 bt_status;
	u8 last_channel;
	__le32 tsf_low;
	__le32 tsf_high;
	struct iwl_scan_results_notif results[];
} __packed; /* SCAN_COMPLETE_NTF_API_S_VER_2 */

/* scan offload */
#define IWL_SCAN_MAX_BLACKLIST_LEN	64
#define IWL_SCAN_SHORT_BLACKLIST_LEN	16
#define IWL_SCAN_MAX_PROFILES		11
#define SCAN_OFFLOAD_PROBE_REQ_SIZE	512

/* Default watchdog (in MS) for scheduled scan iteration */
#define IWL_SCHED_SCAN_WATCHDOG cpu_to_le16(15000)

#define IWL_GOOD_CRC_TH_DEFAULT cpu_to_le16(1)
#define CAN_ABORT_STATUS 1

#define IWL_FULL_SCAN_MULTIPLIER 5
#define IWL_FAST_SCHED_SCAN_ITERATIONS 3

enum scan_framework_client {
	SCAN_CLIENT_SCHED_SCAN		= BIT(0),
	SCAN_CLIENT_NETDETECT		= BIT(1),
	SCAN_CLIENT_ASSET_TRACKING	= BIT(2),
};

/**
 * struct iwl_scan_offload_cmd - SCAN_REQUEST_FIXED_PART_API_S_VER_6
 * @scan_flags:		see enum iwl_scan_flags
 * @channel_count:	channels in channel list
 * @quiet_time:		dwell time, in milisiconds, on quiet channel
 * @quiet_plcp_th:	quiet channel num of packets threshold
 * @good_CRC_th:	passive to active promotion threshold
 * @rx_chain:		RXON rx chain.
 * @max_out_time:	max TUs to be out of assoceated channel
 * @suspend_time:	pause scan this TUs when returning to service channel
 * @flags:		RXON flags
 * @filter_flags:	RXONfilter
 * @tx_cmd:		tx command for active scan; for 2GHz and for 5GHz.
 * @direct_scan:	list of SSIDs for directed active scan
 * @scan_type:		see enum iwl_scan_type.
 * @rep_count:		repetition count for each scheduled scan iteration.
 */
struct iwl_scan_offload_cmd {
	__le16 len;
	u8 scan_flags;
	u8 channel_count;
	__le16 quiet_time;
	__le16 quiet_plcp_th;
	__le16 good_CRC_th;
	__le16 rx_chain;
	__le32 max_out_time;
	__le32 suspend_time;
	/* RX_ON_FLAGS_API_S_VER_1 */
	__le32 flags;
	__le32 filter_flags;
	struct iwl_tx_cmd tx_cmd[2];
	/* SCAN_DIRECT_SSID_IE_API_S_VER_1 */
	struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
	__le32 scan_type;
	__le32 rep_count;
} __packed;

enum iwl_scan_offload_channel_flags {
	IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE		= BIT(0),
	IWL_SCAN_OFFLOAD_CHANNEL_NARROW		= BIT(22),
	IWL_SCAN_OFFLOAD_CHANNEL_FULL		= BIT(24),
	IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL	= BIT(25),
};

/* channel configuration for struct iwl_scan_offload_cfg. Each channels needs:
 * __le32 type:	bitmap; bits 1-20 are for directed scan to i'th ssid and
 *	see enum iwl_scan_offload_channel_flags.
 * __le16 channel_number: channel number 1-13 etc.
 * __le16 iter_count: repetition count for the channel.
 * __le32 iter_interval: interval between two innteration on one channel.
 * u8 active_dwell.
 * u8 passive_dwell.
 */
#define IWL_SCAN_CHAN_SIZE 14

/**
 * iwl_scan_offload_cfg - SCAN_OFFLOAD_CONFIG_API_S
 * @scan_cmd:		scan command fixed part
 * @data:		scan channel configuration and probe request frames
 */
struct iwl_scan_offload_cfg {
	struct iwl_scan_offload_cmd scan_cmd;
	u8 data[0];
} __packed;

/**
 * iwl_scan_offload_blacklist - SCAN_OFFLOAD_BLACKLIST_S
 * @ssid:		MAC address to filter out
 * @reported_rssi:	AP rssi reported to the host
 * @client_bitmap: clients ignore this entry  - enum scan_framework_client
 */
struct iwl_scan_offload_blacklist {
	u8 ssid[ETH_ALEN];
	u8 reported_rssi;
	u8 client_bitmap;
} __packed;

enum iwl_scan_offload_network_type {
	IWL_NETWORK_TYPE_BSS	= 1,
	IWL_NETWORK_TYPE_IBSS	= 2,
	IWL_NETWORK_TYPE_ANY	= 3,
};

enum iwl_scan_offload_band_selection {
	IWL_SCAN_OFFLOAD_SELECT_2_4	= 0x4,
	IWL_SCAN_OFFLOAD_SELECT_5_2	= 0x8,
	IWL_SCAN_OFFLOAD_SELECT_ANY	= 0xc,
};

/**
 * iwl_scan_offload_profile - SCAN_OFFLOAD_PROFILE_S
 * @ssid_index:		index to ssid list in fixed part
 * @unicast_cipher:	encryption olgorithm to match - bitmap
 * @aut_alg:		authentication olgorithm to match - bitmap
 * @network_type:	enum iwl_scan_offload_network_type
 * @band_selection:	enum iwl_scan_offload_band_selection
 * @client_bitmap:	clients waiting for match - enum scan_framework_client
 */
struct iwl_scan_offload_profile {
	u8 ssid_index;
	u8 unicast_cipher;
	u8 auth_alg;
	u8 network_type;
	u8 band_selection;
	u8 client_bitmap;
	u8 reserved[2];
} __packed;

/**
 * iwl_scan_offload_profile_cfg - SCAN_OFFLOAD_PROFILES_CFG_API_S_VER_1
 * @blaclist:		AP list to filter off from scan results
 * @profiles:		profiles to search for match
 * @blacklist_len:	length of blacklist
 * @num_profiles:	num of profiles in the list
 * @match_notify:	clients waiting for match found notification
 * @pass_match:		clients waiting for the results
 * @active_clients:	active clients bitmap - enum scan_framework_client
 * @any_beacon_notify:	clients waiting for match notification without match
 */
struct iwl_scan_offload_profile_cfg {
	struct iwl_scan_offload_profile profiles[IWL_SCAN_MAX_PROFILES];
	u8 blacklist_len;
	u8 num_profiles;
	u8 match_notify;
	u8 pass_match;
	u8 active_clients;
	u8 any_beacon_notify;
	u8 reserved[2];
} __packed;

/**
 * iwl_scan_offload_schedule - schedule of scan offload
 * @delay:		delay between iterations, in seconds.
 * @iterations:		num of scan iterations
 * @full_scan_mul:	number of partial scans before each full scan
 */
struct iwl_scan_offload_schedule {
	__le16 delay;
	u8 iterations;
	u8 full_scan_mul;
} __packed;

/*
 * iwl_scan_offload_flags
 *
 * 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_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_EBS_QUICK_MODE	= BIT(5),
	IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE	= BIT(6),
};

/**
 * iwl_scan_offload_req - scan offload request command
 * @flags:		bitmap - enum iwl_scan_offload_flags.
 * @watchdog:		maximum scan duration in TU.
 * @delay:		delay in seconds before first iteration.
 * @schedule_line:	scan offload schedule, for fast and regular scan.
 */
struct iwl_scan_offload_req {
	__le16 flags;
	__le16 watchdog;
	__le16 delay;
	__le16 reserved;
	struct iwl_scan_offload_schedule schedule_line[2];
} __packed;

enum iwl_scan_offload_compleate_status {
	IWL_SCAN_OFFLOAD_COMPLETED	= 1,
	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 ebs_status;
} __packed;

/**
 * iwl_sched_scan_results - SCAN_OFFLOAD_MATCH_FOUND_NTF_API_S_VER_1
 * @ssid_bitmap:	SSIDs indexes found in this iteration
 * @client_bitmap:	clients that are active and wait for this notification
 */
struct iwl_sched_scan_results {
	__le16 ssid_bitmap;
	u8 client_bitmap;
	u8 reserved;
};

/* Unified LMAC scan API */

#define IWL_MVM_BASIC_PASSIVE_DWELL 110

/**
 * iwl_scan_req_tx_cmd - SCAN_REQ_TX_CMD_API_S
 * @tx_flags: combination of TX_CMD_FLG_*
 * @rate_n_flags: rate for *all* Tx attempts, if TX_CMD_FLG_STA_RATE_MSK is
 *	cleared. Combination of RATE_MCS_*
 * @sta_id: index of destination station in FW station table
 * @reserved: for alignment and future use
 */
struct iwl_scan_req_tx_cmd {
	__le32 tx_flags;
	__le32 rate_n_flags;
	u8 sta_id;
	u8 reserved[3];
} __packed;

enum iwl_scan_channel_flags_lmac {
	IWL_UNIFIED_SCAN_CHANNEL_FULL		= BIT(27),
	IWL_UNIFIED_SCAN_CHANNEL_PARTIAL	= BIT(28),
};

/**
 * iwl_scan_channel_cfg_lmac - SCAN_CHANNEL_CFG_S_VER2
 * @flags:		bits 1-20: directed scan to i'th ssid
 *			other bits &enum iwl_scan_channel_flags_lmac
 * @channel_number:	channel number 1-13 etc
 * @iter_count:		scan iteration on this channel
 * @iter_interval:	interval in seconds between iterations on one channel
 */
struct iwl_scan_channel_cfg_lmac {
	__le32 flags;
	__le16 channel_num;
	__le16 iter_count;
	__le32 iter_interval;
} __packed;

/*
 * iwl_scan_probe_segment - PROBE_SEGMENT_API_S_VER_1
 * @offset: offset in the data block
 * @len: length of the segment
 */
struct iwl_scan_probe_segment {
	__le16 offset;
	__le16 len;
} __packed;

/* iwl_scan_probe_req - PROBE_REQUEST_FRAME_API_S_VER_2
 * @mac_header: first (and common) part of the probe
 * @band_data: band specific data
 * @common_data: last (and common) part of the probe
 * @buf: raw data block
 */
struct iwl_scan_probe_req {
	struct iwl_scan_probe_segment mac_header;
	struct iwl_scan_probe_segment band_data[2];
	struct iwl_scan_probe_segment common_data;
	u8 buf[SCAN_OFFLOAD_PROBE_REQ_SIZE];
} __packed;

enum iwl_scan_channel_flags {
	IWL_SCAN_CHANNEL_FLAG_EBS		= BIT(0),
	IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE	= BIT(1),
	IWL_SCAN_CHANNEL_FLAG_CACHE_ADD		= BIT(2),
};

/* iwl_scan_channel_opt - CHANNEL_OPTIMIZATION_API_S
 * @flags: enum iwl_scan_channel_flgs
 * @non_ebs_ratio: how many regular scan iteration before EBS
 */
struct iwl_scan_channel_opt {
	__le16 flags;
	__le16 non_ebs_ratio;
} __packed;

/**
 * iwl_mvm_lmac_scan_flags
 * @IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL: pass all beacons and probe responses
 *	without filtering.
 * @IWL_MVM_LMAC_SCAN_FLAG_PASSIVE: force passive scan on all channels
 * @IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION: single channel scan
 * @IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE: send iteration complete notification
 * @IWL_MVM_LMAC_SCAN_FLAG_MULTIPLE_SSIDS multiple SSID matching
 * @IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED: all passive scans will be fragmented
 * @IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED: insert WFA vendor-specific TPC report
 *	and DS parameter set IEs into probe requests.
 */
enum iwl_mvm_lmac_scan_flags {
	IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL		= BIT(0),
	IWL_MVM_LMAC_SCAN_FLAG_PASSIVE		= BIT(1),
	IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION	= BIT(2),
	IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE	= BIT(3),
	IWL_MVM_LMAC_SCAN_FLAG_MULTIPLE_SSIDS	= BIT(4),
	IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED	= BIT(5),
	IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED	= BIT(6),
};

enum iwl_scan_priority {
	IWL_SCAN_PRIORITY_LOW,
	IWL_SCAN_PRIORITY_MEDIUM,
	IWL_SCAN_PRIORITY_HIGH,
};

/**
 * iwl_scan_req_unified_lmac - SCAN_REQUEST_CMD_API_S_VER_1
 * @reserved1: for alignment and future use
 * @channel_num: num of channels to scan
 * @active-dwell: dwell time for active channels
 * @passive-dwell: dwell time for passive channels
 * @fragmented-dwell: dwell time for fragmented passive scan
 * @reserved2: for alignment and future use
 * @rx_chain_selct: PHY_RX_CHAIN_* flags
 * @scan_flags: &enum iwl_mvm_lmac_scan_flags
 * @max_out_time: max time (in TU) to be out of associated channel
 * @suspend_time: pause scan this long (TUs) when returning to service channel
 * @flags: RXON flags
 * @filter_flags: RXON filter
 * @tx_cmd: tx command for active scan; for 2GHz and for 5GHz
 * @direct_scan: list of SSIDs for directed active scan
 * @scan_prio: enum iwl_scan_priority
 * @iter_num: number of scan iterations
 * @delay: delay in seconds before first iteration
 * @schedule: two scheduling plans. The first one is finite, the second one can
 *	be infinite.
 * @channel_opt: channel optimization options, for full and partial scan
 * @data: channel configuration and probe request packet.
 */
struct iwl_scan_req_unified_lmac {
	/* SCAN_REQUEST_FIXED_PART_API_S_VER_7 */
	__le32 reserved1;
	u8 n_channels;
	u8 active_dwell;
	u8 passive_dwell;
	u8 fragmented_dwell;
	__le16 reserved2;
	__le16 rx_chain_select;
	__le32 scan_flags;
	__le32 max_out_time;
	__le32 suspend_time;
	/* RX_ON_FLAGS_API_S_VER_1 */
	__le32 flags;
	__le32 filter_flags;
	struct iwl_scan_req_tx_cmd tx_cmd[2];
	struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
	__le32 scan_prio;
	/* SCAN_REQ_PERIODIC_PARAMS_API_S */
	__le32 iter_num;
	__le32 delay;
	struct iwl_scan_offload_schedule schedule[2];
	struct iwl_scan_channel_opt channel_opt[2];
	u8 data[];
} __packed;

/**
 * struct iwl_lmac_scan_results_notif - scan results for one channel -
 *	SCAN_RESULT_NTF_API_S_VER_3
 * @channel: which channel the results are from
 * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
 * @probe_status: SCAN_PROBE_STATUS_*, indicates success of probe request
 * @num_probe_not_sent: # of request that weren't sent due to not enough time
 * @duration: duration spent in channel, in usecs
 */
struct iwl_lmac_scan_results_notif {
	u8 channel;
	u8 band;
	u8 probe_status;
	u8 num_probe_not_sent;
	__le32 duration;
} __packed;

/**
 * struct iwl_lmac_scan_complete_notif - notifies end of scanning (all channels)
 *	SCAN_COMPLETE_NTF_API_S_VER_3
 * @scanned_channels: number of channels scanned (and number of valid results)
 * @status: one of SCAN_COMP_STATUS_*
 * @bt_status: BT on/off status
 * @last_channel: last channel that was scanned
 * @tsf_low: TSF timer (lower half) in usecs
 * @tsf_high: TSF timer (higher half) in usecs
 * @results: an array of scan results, only "scanned_channels" of them are valid
 */
struct iwl_lmac_scan_complete_notif {
	u8 scanned_channels;
	u8 status;
	u8 bt_status;
	u8 last_channel;
	__le32 tsf_low;
	__le32 tsf_high;
	struct iwl_scan_results_notif results[];
} __packed;

/**
 * iwl_scan_offload_complete - PERIODIC_SCAN_COMPLETE_NTF_API_S_VER_2
 * @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_complete_status
 * @ebs_status: EBS success status &enum iwl_scan_ebs_status
 * @time_after_last_iter; time in seconds elapsed after last iteration
 */
struct iwl_periodic_scan_complete {
	u8 last_schedule_line;
	u8 last_schedule_iteration;
	u8 status;
	u8 ebs_status;
	__le32 time_after_last_iter;
	__le32 reserved;
} __packed;

/* UMAC Scan API */

/**
 * struct iwl_mvm_umac_cmd_hdr - Command header for UMAC commands
 * @size:	size of the command (not including header)
 * @reserved0:	for future use and alignment
 * @ver:	API version number
 */
struct iwl_mvm_umac_cmd_hdr {
	__le16 size;
	u8 reserved0;
	u8 ver;
} __packed;

#define IWL_MVM_MAX_SIMULTANEOUS_SCANS 8

enum scan_config_flags {
	SCAN_CONFIG_FLAG_ACTIVATE			= BIT(0),
	SCAN_CONFIG_FLAG_DEACTIVATE			= BIT(1),
	SCAN_CONFIG_FLAG_FORBID_CHUB_REQS		= BIT(2),
	SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS		= BIT(3),
	SCAN_CONFIG_FLAG_SET_TX_CHAINS			= BIT(8),
	SCAN_CONFIG_FLAG_SET_RX_CHAINS			= BIT(9),
	SCAN_CONFIG_FLAG_SET_AUX_STA_ID			= BIT(10),
	SCAN_CONFIG_FLAG_SET_ALL_TIMES			= BIT(11),
	SCAN_CONFIG_FLAG_SET_EFFECTIVE_TIMES		= BIT(12),
	SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS		= BIT(13),
	SCAN_CONFIG_FLAG_SET_LEGACY_RATES		= BIT(14),
	SCAN_CONFIG_FLAG_SET_MAC_ADDR			= BIT(15),
	SCAN_CONFIG_FLAG_SET_FRAGMENTED			= BIT(16),
	SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED		= BIT(17),
	SCAN_CONFIG_FLAG_SET_CAM_MODE			= BIT(18),
	SCAN_CONFIG_FLAG_CLEAR_CAM_MODE			= BIT(19),
	SCAN_CONFIG_FLAG_SET_PROMISC_MODE		= BIT(20),
	SCAN_CONFIG_FLAG_CLEAR_PROMISC_MODE		= BIT(21),

	/* Bits 26-31 are for num of channels in channel_array */
#define SCAN_CONFIG_N_CHANNELS(n) ((n) << 26)
};

enum scan_config_rates {
	/* OFDM basic rates */
	SCAN_CONFIG_RATE_6M	= BIT(0),
	SCAN_CONFIG_RATE_9M	= BIT(1),
	SCAN_CONFIG_RATE_12M	= BIT(2),
	SCAN_CONFIG_RATE_18M	= BIT(3),
	SCAN_CONFIG_RATE_24M	= BIT(4),
	SCAN_CONFIG_RATE_36M	= BIT(5),
	SCAN_CONFIG_RATE_48M	= BIT(6),
	SCAN_CONFIG_RATE_54M	= BIT(7),
	/* CCK basic rates */
	SCAN_CONFIG_RATE_1M	= BIT(8),
	SCAN_CONFIG_RATE_2M	= BIT(9),
	SCAN_CONFIG_RATE_5M	= BIT(10),
	SCAN_CONFIG_RATE_11M	= BIT(11),

	/* Bits 16-27 are for supported rates */
#define SCAN_CONFIG_SUPPORTED_RATE(rate)	((rate) << 16)
};

enum iwl_channel_flags {
	IWL_CHANNEL_FLAG_EBS				= BIT(0),
	IWL_CHANNEL_FLAG_ACCURATE_EBS			= BIT(1),
	IWL_CHANNEL_FLAG_EBS_ADD			= BIT(2),
	IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE	= BIT(3),
};

/**
 * struct iwl_scan_config
 * @hdr: umac command header
 * @flags:			enum scan_config_flags
 * @tx_chains:			valid_tx antenna - ANT_* definitions
 * @rx_chains:			valid_rx antenna - ANT_* definitions
 * @legacy_rates:		default legacy rates - enum scan_config_rates
 * @out_of_channel_time:	default max out of serving channel time
 * @suspend_time:		default max suspend time
 * @dwell_active:		default dwell time for active scan
 * @dwell_passive:		default dwell time for passive scan
 * @dwell_fragmented:		default dwell time for fragmented scan
 * @reserved:			for future use and alignment
 * @mac_addr:			default mac address to be used in probes
 * @bcast_sta_id:		the index of the station in the fw
 * @channel_flags:		default channel flags - enum iwl_channel_flags
 *				scan_config_channel_flag
 * @channel_array:		default supported channels
 */
struct iwl_scan_config {
	struct iwl_mvm_umac_cmd_hdr hdr;
	__le32 flags;
	__le32 tx_chains;
	__le32 rx_chains;
	__le32 legacy_rates;
	__le32 out_of_channel_time;
	__le32 suspend_time;
	u8 dwell_active;
	u8 dwell_passive;
	u8 dwell_fragmented;
	u8 reserved;
	u8 mac_addr[ETH_ALEN];
	u8 bcast_sta_id;
	u8 channel_flags;
	u8 channel_array[];
} __packed; /* SCAN_CONFIG_DB_CMD_API_S */

/**
 * iwl_umac_scan_flags
 *@IWL_UMAC_SCAN_FLAG_PREEMPTIVE: scan process triggered by this scan request
 *	can be preempted by other scan requests with higher priority.
 *	The low priority scan is aborted.
 *@IWL_UMAC_SCAN_FLAG_START_NOTIF: notification will be sent to the driver
 *	when scan starts.
 */
enum iwl_umac_scan_flags {
	IWL_UMAC_SCAN_FLAG_PREEMPTIVE		= BIT(0),
	IWL_UMAC_SCAN_FLAG_START_NOTIF		= BIT(1),
};

enum iwl_umac_scan_uid_offsets {
	IWL_UMAC_SCAN_UID_TYPE_OFFSET		= 0,
	IWL_UMAC_SCAN_UID_SEQ_OFFSET		= 8,
};

enum iwl_umac_scan_general_flags {
	IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC	= BIT(0),
	IWL_UMAC_SCAN_GEN_FLAGS_OVER_BT		= BIT(1),
	IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL	= BIT(2),
	IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE		= BIT(3),
	IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT	= BIT(4),
	IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE	= BIT(5),
	IWL_UMAC_SCAN_GEN_FLAGS_MULTIPLE_SSID	= BIT(6),
	IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED	= BIT(7),
	IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED	= BIT(8),
	IWL_UMAC_SCAN_GEN_FLAGS_MATCH		= BIT(9)
};

/**
 * struct iwl_scan_channel_cfg_umac
 * @flags:		bitmap - 0-19:	directed scan to i'th ssid.
 * @channel_num:	channel number 1-13 etc.
 * @iter_count:		repetition count for the channel.
 * @iter_interval:	interval between two scan interations on one channel.
 */
struct iwl_scan_channel_cfg_umac {
	__le32 flags;
	u8 channel_num;
	u8 iter_count;
	__le16 iter_interval;
} __packed; /* SCAN_CHANNEL_CFG_S_VER2 */

/**
 * struct iwl_scan_umac_schedule
 * @interval: interval in seconds between scan iterations
 * @iter_count: num of scan iterations for schedule plan, 0xff for infinite loop
 * @reserved: for alignment and future use
 */
struct iwl_scan_umac_schedule {
	__le16 interval;
	u8 iter_count;
	u8 reserved;
} __packed; /* SCAN_SCHED_PARAM_API_S_VER_1 */

/**
 * struct iwl_scan_req_umac_tail - the rest of the UMAC scan request command
 *      parameters following channels configuration array.
 * @schedule: two scheduling plans.
 * @delay: delay in TUs before starting the first scan iteration
 * @reserved: for future use and alignment
 * @preq: probe request with IEs blocks
 * @direct_scan: list of SSIDs for directed active scan
 */
struct iwl_scan_req_umac_tail {
	/* SCAN_PERIODIC_PARAMS_API_S_VER_1 */
	struct iwl_scan_umac_schedule schedule[2];
	__le16 delay;
	__le16 reserved;
	/* SCAN_PROBE_PARAMS_API_S_VER_1 */
	struct iwl_scan_probe_req preq;
	struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
} __packed;

/**
 * struct iwl_scan_req_umac
 * @hdr: umac command header
 * @flags: &enum iwl_umac_scan_flags
 * @uid: scan id, &enum iwl_umac_scan_uid_offsets
 * @ooc_priority: out of channel priority - &enum iwl_scan_priority
 * @general_flags: &enum iwl_umac_scan_general_flags
 * @reserved1: for future use and alignment
 * @active_dwell: dwell time for active scan
 * @passive_dwell: dwell time for passive scan
 * @fragmented_dwell: dwell time for fragmented passive scan
 * @max_out_time: max out of serving channel time
 * @suspend_time: max suspend time
 * @scan_priority: scan internal prioritization &enum iwl_scan_priority
 * @channel_flags: &enum iwl_scan_channel_flags
 * @n_channels: num of channels in scan request
 * @reserved2: for future use and alignment
 * @data: &struct iwl_scan_channel_cfg_umac and
 *	&struct iwl_scan_req_umac_tail
 */
struct iwl_scan_req_umac {
	struct iwl_mvm_umac_cmd_hdr hdr;
	__le32 flags;
	__le32 uid;
	__le32 ooc_priority;
	/* SCAN_GENERAL_PARAMS_API_S_VER_1 */
	__le32 general_flags;
	u8 reserved1;
	u8 active_dwell;
	u8 passive_dwell;
	u8 fragmented_dwell;
	__le32 max_out_time;
	__le32 suspend_time;
	__le32 scan_priority;
	/* SCAN_CHANNEL_PARAMS_API_S_VER_1 */
	u8 channel_flags;
	u8 n_channels;
	__le16 reserved2;
	u8 data[];
} __packed; /* SCAN_REQUEST_CMD_UMAC_API_S_VER_1 */

/**
 * struct iwl_umac_scan_abort
 * @hdr: umac command header
 * @uid: scan id, &enum iwl_umac_scan_uid_offsets
 * @flags: reserved
 */
struct iwl_umac_scan_abort {
	struct iwl_mvm_umac_cmd_hdr hdr;
	__le32 uid;
	__le32 flags;
} __packed; /* SCAN_ABORT_CMD_UMAC_API_S_VER_1 */

/**
 * struct iwl_umac_scan_complete
 * @uid: scan id, &enum iwl_umac_scan_uid_offsets
 * @last_schedule: last scheduling line
 * @last_iter:	last scan iteration number
 * @scan status: &enum iwl_scan_offload_complete_status
 * @ebs_status: &enum iwl_scan_ebs_status
 * @time_from_last_iter: time elapsed from last iteration
 * @reserved: for future use
 */
struct iwl_umac_scan_complete {
	__le32 uid;
	u8 last_schedule;
	u8 last_iter;
	u8 status;
	u8 ebs_status;
	__le32 time_from_last_iter;
	__le32 reserved;
} __packed; /* SCAN_COMPLETE_NTF_UMAC_API_S_VER_1 */

#define SCAN_OFFLOAD_MATCHING_CHANNELS_LEN 5
/**
 * struct iwl_scan_offload_profile_match - match information
 * @bssid: matched bssid
 * @channel: channel where the match occurred
 * @energy:
 * @matching_feature:
 * @matching_channels: bitmap of channels that matched, referencing
 *	the channels passed in tue scan offload request
 */
struct iwl_scan_offload_profile_match {
	u8 bssid[ETH_ALEN];
	__le16 reserved;
	u8 channel;
	u8 energy;
	u8 matching_feature;
	u8 matching_channels[SCAN_OFFLOAD_MATCHING_CHANNELS_LEN];
} __packed; /* SCAN_OFFLOAD_PROFILE_MATCH_RESULTS_S_VER_1 */

/**
 * struct iwl_scan_offload_profiles_query - match results query response
 * @matched_profiles: bitmap of matched profiles, referencing the
 *	matches passed in the scan offload request
 * @last_scan_age: age of the last offloaded scan
 * @n_scans_done: number of offloaded scans done
 * @gp2_d0u: GP2 when D0U occurred
 * @gp2_invoked: GP2 when scan offload was invoked
 * @resume_while_scanning: not used
 * @self_recovery: obsolete
 * @reserved: reserved
 * @matches: array of match information, one for each match
 */
struct iwl_scan_offload_profiles_query {
	__le32 matched_profiles;
	__le32 last_scan_age;
	__le32 n_scans_done;
	__le32 gp2_d0u;
	__le32 gp2_invoked;
	u8 resume_while_scanning;
	u8 self_recovery;
	__le16 reserved;
	struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
} __packed; /* SCAN_OFFLOAD_PROFILES_QUERY_RSP_S_VER_2 */

#endif