iwlwifi: mvm: add basic Time of Flight (802.11mc FTM) support

ToF is a time based method for measurement of the WiFi device
location within a WiFi environment. The driver functionality provided
by this patch is the interface for communication with FW and receiving
location related updates from the FW. The interface provided by this
patch is via debugfs.
Signed-off-by: NGregory Greenman <gregory.greenman@intel.com>
Reviewed-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

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

@@ -280,6 +280,7 @@ typedef unsigned int __bitwise__ iwl_ucode_tlv_capa_t;
  * @IWL_UCODE_TLV_CAPA_LAR_SUPPORT: supports Location Aware Regulatory
  * @IWL_UCODE_TLV_CAPA_UMAC_SCAN: supports UMAC scan.
  * @IWL_UCODE_TLV_CAPA_BEAMFORMER: supports Beamformer
+ * @IWL_UCODE_TLV_CAPA_TOF_SUPPORT: supports Time of Flight (802.11mc FTM)
  * @IWL_UCODE_TLV_CAPA_TDLS_SUPPORT: support basic TDLS functionality
  * @IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT: supports insertion of current
  *	tx power value into TPC Report action frame and Link Measurement Report
@@ -307,6 +308,7 @@ enum iwl_ucode_tlv_capa {
 	IWL_UCODE_TLV_CAPA_LAR_SUPPORT			= (__force iwl_ucode_tlv_capa_t)1,
 	IWL_UCODE_TLV_CAPA_UMAC_SCAN			= (__force iwl_ucode_tlv_capa_t)2,
 	IWL_UCODE_TLV_CAPA_BEAMFORMER			= (__force iwl_ucode_tlv_capa_t)3,
+	IWL_UCODE_TLV_CAPA_TOF_SUPPORT                  = (__force iwl_ucode_tlv_capa_t)5,
 	IWL_UCODE_TLV_CAPA_TDLS_SUPPORT			= (__force iwl_ucode_tlv_capa_t)6,
 	IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT	= (__force iwl_ucode_tlv_capa_t)8,
 	IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT	= (__force iwl_ucode_tlv_capa_t)9,

drivers/net/wireless/iwlwifi/mvm/Makefile

@@ -6,6 +6,7 @@ iwlmvm-y += power.o coex.o coex_legacy.o
 iwlmvm-y += tt.o offloading.o tdls.o
 iwlmvm-$(CONFIG_IWLWIFI_DEBUGFS) += debugfs.o debugfs-vif.o
 iwlmvm-$(CONFIG_IWLWIFI_LEDS) += led.o
+iwlmvm-y += tof.o
 iwlmvm-$(CONFIG_PM_SLEEP) += d3.o
 
 ccflags-y += -D__CHECK_ENDIAN__ -I$(src)/../

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

@@ -102,6 +102,7 @@
 #define IWL_MVM_QUOTA_THRESHOLD			4
 #define IWL_MVM_RS_RSSI_BASED_INIT_RATE         0
 #define IWL_MVM_RS_DISABLE_P2P_MIMO		0
+#define IWL_MVM_TOF_IS_RESPONDER		0
 #define IWL_MVM_RS_NUM_TRY_BEFORE_ANT_TOGGLE    1
 #define IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE      2
 #define IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE_TW   1

drivers/net/wireless/iwlwifi/mvm/fw-api-tof.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) 2015 Intel Deutschland 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) 2015 Intel Deutschland 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_tof_h__
+#define __fw_api_tof_h__
+
+#include "fw-api.h"
+
+/* ToF sub-group command IDs */
+enum iwl_mvm_tof_sub_grp_ids {
+	TOF_RANGE_REQ_CMD = 0x1,
+	TOF_CONFIG_CMD = 0x2,
+	TOF_RANGE_ABORT_CMD = 0x3,
+	TOF_RANGE_REQ_EXT_CMD = 0x4,
+	TOF_RESPONDER_CONFIG_CMD = 0x5,
+	TOF_NW_INITIATED_RES_SEND_CMD = 0x6,
+	TOF_NEIGHBOR_REPORT_REQ_CMD = 0x7,
+	TOF_NEIGHBOR_REPORT_RSP_NOTIF = 0xFC,
+	TOF_NW_INITIATED_REQ_RCVD_NOTIF = 0xFD,
+	TOF_RANGE_RESPONSE_NOTIF = 0xFE,
+	TOF_MCSI_DEBUG_NOTIF = 0xFB,
+};
+
+/**
+ * struct iwl_tof_config_cmd - ToF configuration
+ * @tof_disabled: 0 enabled, 1 - disabled
+ * @one_sided_disabled: 0 enabled, 1 - disabled
+ * @is_debug_mode: 1 debug mode, 0 - otherwise
+ * @is_buf_required: 1 channel estimation buffer required, 0 - otherwise
+ */
+struct iwl_tof_config_cmd {
+	struct iwl_mvm_umac_cmd_hdr hdr;
+	__le32 sub_grp_cmd_id;
+	u8 tof_disabled;
+	u8 one_sided_disabled;
+	u8 is_debug_mode;
+	u8 is_buf_required;
+} __packed;
+
+/**
+ * struct iwl_tof_responder_config_cmd - ToF AP mode (for debug)
+ * @burst_period: future use: (currently hard coded in the LMAC)
+ *		  The interval between two sequential bursts.
+ * @min_delta_ftm: future use: (currently hard coded in the LMAC)
+ *		   The minimum delay between two sequential FTM Responses
+ *		   in the same burst.
+ * @burst_duration: future use: (currently hard coded in the LMAC)
+ *		   The total time for all FTMs handshake in the same burst.
+ *		   Affect the time events duration in the LMAC.
+ * @num_of_burst_exp: future use: (currently hard coded in the LMAC)
+ *		   The number of bursts for the current ToF request. Affect
+ *		   the number of events allocations in the current iteration.
+ * @get_ch_est: for xVT only, NA for driver
+ * @abort_responder: when set to '1' - Responder will terminate its activity
+ *		     (all other fields in the command are ignored)
+ * @recv_sta_req_params: 1 - Responder will ignore the other Responder's
+ *			 params and use the recomended Initiator params.
+ *			 0 - otherwise
+ * @channel_num: current AP Channel
+ * @bandwidth: current AP Bandwidth: 0  20MHz, 1  40MHz, 2  80MHz
+ * @rate: current AP rate
+ * @ctrl_ch_position: coding of the control channel position relative to
+ *	     the center frequency.
+ *	     40MHz  0 below center, 1 above center
+ *	     80MHz  bits [0..1]: 0  the near 20MHz to the center,
+ *				 1  the far  20MHz to the center
+ *		    bit[2]  as above 40MHz
+ * @ftm_per_burst: FTMs per Burst
+ * @ftm_resp_ts_avail: '0' - we don't measure over the Initial FTM Response,
+ *		  '1' - we measure over the Initial FTM Response
+ * @asap_mode: ASAP / Non ASAP mode for the current WLS station
+ * @sta_id: index of the AP STA when in AP mode
+ * @tsf_timer_offset_msecs: The dictated time offset (mSec) from the AP's TSF
+ * @toa_offset: Artificial addition [0.1nsec] for the ToA - to be used for debug
+ *		purposes, simulating station movement by adding various values
+ *		to this field
+ * @bssid: Current AP BSSID
+ */
+struct iwl_tof_responder_config_cmd {
+	struct iwl_mvm_umac_cmd_hdr hdr;
+	__le32 sub_grp_cmd_id;
+	__le16 burst_period;
+	u8 min_delta_ftm;
+	u8 burst_duration;
+	u8 num_of_burst_exp;
+	u8 get_ch_est;
+	u8 abort_responder;
+	u8 recv_sta_req_params;
+	u8 channel_num;
+	u8 bandwidth;
+	u8 rate;
+	u8 ctrl_ch_position;
+	u8 ftm_per_burst;
+	u8 ftm_resp_ts_avail;
+	u8 asap_mode;
+	u8 sta_id;
+	__le16 tsf_timer_offset_msecs;
+	__le16 toa_offset;
+	u8 bssid[ETH_ALEN];
+} __packed;
+
+/**
+ * struct iwl_tof_range_request_ext_cmd - extended range req for WLS
+ * @tsf_timer_offset_msec: the recommended time offset (mSec) from the AP's TSF
+ * @min_delta_ftm: Minimal time between two consecutive measurements,
+ *		   in units of 100us. 0 means no preference by station
+ * @ftm_format_and_bw20M: FTM Channel Spacing/Format for 20MHz: recommended
+ *			value be sent to the AP
+ * @ftm_format_and_bw40M: FTM Channel Spacing/Format for 40MHz: recommended
+ *			value to be sent to the AP
+ * @ftm_format_and_bw80M: FTM Channel Spacing/Format for 80MHz: recommended
+ *			value to be sent to the AP
+ */
+struct iwl_tof_range_req_ext_cmd {
+	struct iwl_mvm_umac_cmd_hdr hdr;
+	__le32 sub_grp_cmd_id;
+	__le16 tsf_timer_offset_msec;
+	__le16 reserved;
+	u8 min_delta_ftm;
+	u8 ftm_format_and_bw20M;
+	u8 ftm_format_and_bw40M;
+	u8 ftm_format_and_bw80M;
+} __packed;
+
+#define IWL_MVM_TOF_MAX_APS 21
+
+/**
+ * struct iwl_tof_range_req_ap_entry - AP configuration parameters
+ * @channel_num: Current AP Channel
+ * @bandwidth: Current AP Bandwidth: 0  20MHz, 1  40MHz, 2  80MHz
+ * @tsf_delta_direction: TSF relatively to the subject AP
+ * @ctrl_ch_position: Coding of the control channel position relative to the
+ *	     center frequency.
+ *	     40MHz  0 below center, 1 above center
+ *	     80MHz  bits [0..1]: 0  the near 20MHz to the center,
+ *				 1  the far  20MHz to the center
+ *		    bit[2]  as above 40MHz
+ * @bssid: AP's bss id
+ * @measure_type: Measurement type: 0 - two sided, 1 - One sided
+ * @num_of_bursts: Recommended value to be sent to the AP.  2s Exponent of the
+ *		   number of measurement iterations (min 2^0 = 1, max 2^14)
+ * @burst_period: Recommended value to be sent to the AP. Measurement
+ *		  periodicity In units of 100ms. ignored if num_of_bursts = 0
+ * @samples_per_burst: 2-sided: the number of FTMs pairs in single Burst (1-31)
+ *		       1-sided: how many rts/cts pairs should be used per burst.
+ * @retries_per_sample: Max number of retries that the LMAC should send
+ *			in case of no replies by the AP.
+ * @tsf_delta: TSF Delta in units of microseconds.
+ *	       The difference between the AP TSF and the device local clock.
+ * @location_req: Location Request Bit[0] LCI should be sent in the FTMR
+ *			      Bit[1] Civic should be sent in the FTMR
+ * @asap_mode: 0 - non asap mode, 1 - asap mode (not relevant for one sided)
+ * @enable_dyn_ack: Enable Dynamic ACK BW.
+ *	    0  Initiator interact with regular AP
+ *	    1  Initiator interact with Responder machine: need to send the
+ *	    Initiator Acks with HT 40MHz / 80MHz, since the Responder should
+ *	    use it for its ch est measurement (this flag will be set when we
+ *	    configure the opposite machine to be Responder).
+ * @rssi: Last received value
+ *	  leagal values: -128-0 (0x7f). above 0x0 indicating an invalid value.
+ */
+struct iwl_tof_range_req_ap_entry {
+	u8 channel_num;
+	u8 bandwidth;
+	u8 tsf_delta_direction;
+	u8 ctrl_ch_position;
+	u8 bssid[ETH_ALEN];
+	u8 measure_type;
+	u8 num_of_bursts;
+	__le16 burst_period;
+	u8 samples_per_burst;
+	u8 retries_per_sample;
+	__le32 tsf_delta;
+	u8 location_req;
+	u8 asap_mode;
+	u8 enable_dyn_ack;
+	s8 rssi;
+} __packed;
+
+/**
+ * enum iwl_tof_response_mode
+ * @IWL_MVM_TOF_RESPOSE_ASAP: report each AP measurement separately as soon as
+ *			      possible (not supported for this release)
+ * @IWL_MVM_TOF_RESPOSE_TIMEOUT: report all AP measurements as a batch upon
+ *				 timeout expiration
+ * @IWL_MVM_TOF_RESPOSE_COMPLETE: report all AP measurements as a batch at the
+ *				  earlier of: measurements completion / timeout
+ *				  expiration.
+ */
+enum iwl_tof_response_mode {
+	IWL_MVM_TOF_RESPOSE_ASAP = 1,
+	IWL_MVM_TOF_RESPOSE_TIMEOUT,
+	IWL_MVM_TOF_RESPOSE_COMPLETE,
+};
+
+/**
+ * struct iwl_tof_range_req_cmd - start measurement cmd
+ * @request_id: A Token incremented per request. The same Token will be
+ *		sent back in the range response
+ * @initiator: 0- NW initiated,  1 - Client Initiated
+ * @one_sided_los_disable: '0'- run ML-Algo for both ToF/OneSided,
+ *			   '1' - run ML-Algo for ToF only
+ * @req_timeout: Requested timeout of the response in units of 100ms.
+ *	     This is equivalent to the session time configured to the
+ *	     LMAC in Initiator Request
+ * @report_policy: Supported partially for this release: For current release -
+ *		   the range report will be uploaded as a batch when ready or
+ *		   when the session is done (successfully / partially).
+ *		   one of iwl_tof_response_mode.
+ * @num_of_ap: Number of APs to measure (error if > IWL_MVM_TOF_MAX_APS)
+ * @macaddr_random: '0' Use default source MAC address (i.e. p2_p),
+ *	            '1' Use MAC Address randomization according to the below
+ * @macaddr_mask: Bits set to 0 shall be copied from the MAC address template.
+ *		  Bits set to 1 shall be randomized by the UMAC
+ */
+struct iwl_tof_range_req_cmd {
+	struct iwl_mvm_umac_cmd_hdr hdr;
+	__le32 sub_grp_cmd_id;
+	u8 request_id;
+	u8 initiator;
+	u8 one_sided_los_disable;
+	u8 req_timeout;
+	u8 report_policy;
+	u8 los_det_disable;
+	u8 num_of_ap;
+	u8 macaddr_random;
+	u8 macaddr_template[ETH_ALEN];
+	u8 macaddr_mask[ETH_ALEN];
+	struct iwl_tof_range_req_ap_entry ap[IWL_MVM_TOF_MAX_APS];
+} __packed;
+
+/**
+ * struct iwl_tof_gen_resp_cmd - generic ToF response
+ */
+struct iwl_tof_gen_resp_cmd {
+	__le32 sub_grp_cmd_id;
+	u8 data[];
+} __packed;
+
+/**
+ * struct iwl_tof_range_rsp_ap_entry_ntfy - AP parameters (response)
+ * @measure_status: current APs measurement status
+ * @measure_bw: Current AP Bandwidth: 0  20MHz, 1  40MHz, 2  80MHz
+ * @rtt: The Round Trip Time that took for the last measurement for
+ *	 current AP [nSec]
+ * @rtt_variance: The Variance of the RTT values measured for current AP
+ * @rtt_spread: The Difference between the maximum and the minimum RTT
+ *	       values measured for current AP in the current session [nsec]
+ * @rssi: RSSI as uploaded in the Channel Estimation notification
+ * @rssi_spread: The Difference between the maximum and the minimum RSSI values
+ *	        measured for current AP in the current session
+ * @range: Measured range [cm]
+ * @range_variance: Measured range variance [cm]
+ * @timestamp: The GP2 Clock [usec] where Channel Estimation notification was
+ *	       uploaded by the LMAC
+ */
+struct iwl_tof_range_rsp_ap_entry_ntfy {
+	u8 bssid[ETH_ALEN];
+	u8 measure_status;
+	u8 measure_bw;
+	__le32 rtt;
+	__le32 rtt_variance;
+	__le32 rtt_spread;
+	s8 rssi;
+	u8 rssi_spread;
+	__le16 reserved;
+	__le32 range;
+	__le32 range_variance;
+	__le32 timestamp;
+} __packed;
+
+/**
+ * struct iwl_tof_range_rsp_ntfy -
+ * @request_id: A Token ID of the corresponding Range request
+ * @request_status: status of current measurement session
+ * @last_in_batch: reprot policy (when not all responses are uploaded at once)
+ * @num_of_aps: Number of APs to measure (error if > IWL_MVM_TOF_MAX_APS)
+ */
+struct iwl_tof_range_rsp_ntfy {
+	u8 request_id;
+	u8 request_status;
+	u8 last_in_batch;
+	u8 num_of_aps;
+	struct iwl_tof_range_rsp_ap_entry_ntfy ap[IWL_MVM_TOF_MAX_APS];
+} __packed;
+
+#define IWL_MVM_TOF_MCSI_BUF_SIZE  (245)
+/**
+ * struct iwl_tof_mcsi_notif - used for debug
+ * @token: token ID for the current session
+ * @role: '0' - initiator, '1' - responder
+ * @initiator_bssid: initiator machine
+ * @responder_bssid: responder machine
+ * @mcsi_buffer: debug data
+ */
+struct iwl_tof_mcsi_notif {
+	u8 token;
+	u8 role;
+	__le16 reserved;
+	u8 initiator_bssid[ETH_ALEN];
+	u8 responder_bssid[ETH_ALEN];
+	u8 mcsi_buffer[IWL_MVM_TOF_MCSI_BUF_SIZE * 4];
+} __packed;
+
+/**
+ * struct iwl_tof_neighbor_report_notif
+ * @bssid: BSSID of the AP which sent the report
+ * @request_token: same token as the corresponding request
+ * @status:
+ * @report_ie_len: the length of the response frame starting from the Element ID
+ * @data: the IEs
+ */
+struct iwl_tof_neighbor_report {
+	u8 bssid[ETH_ALEN];
+	u8 request_token;
+	u8 status;
+	__le16 report_ie_len;
+	u8 data[];
+} __packed;
+
+/**
+ * struct iwl_tof_range_abort_cmd
+ * @request_id: corresponds to a range request
+ */
+struct iwl_tof_range_abort_cmd {
+	struct iwl_mvm_umac_cmd_hdr hdr;
+	__le32 sub_grp_cmd_id;
+	u8 request_id;
+	u8 reserved[3];
+} __packed;
+
+#endif

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

@@ -75,6 +75,7 @@
 #include "fw-api-coex.h"
 #include "fw-api-scan.h"
 #include "fw-api-stats.h"
+#include "fw-api-tof.h"
 
 /* Tx queue numbers */
 enum {
@@ -163,6 +164,10 @@ enum {
 	CALIB_RES_NOTIF_PHY_DB = 0x6b,
 	/* PHY_DB_CMD = 0x6c, */
 
+	/* ToF - 802.11mc FTM */
+	TOF_CMD = 0x10,
+	TOF_NOTIFICATION = 0x11,
+
 	/* Power - legacy power table command */
 	POWER_TABLE_CMD = 0x77,
 	PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION = 0x78,

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

@@ -80,6 +80,7 @@
 #include "sta.h"
 #include "fw-api.h"
 #include "constants.h"
+#include "tof.h"
 
 #define IWL_INVALID_MAC80211_QUEUE	0xff
 #define IWL_MVM_MAX_ADDRESSES		5
@@ -823,6 +824,7 @@ struct iwl_mvm {
 	struct iwl_mvm_shared_mem_cfg shared_mem_cfg;
 
 	u32 ciphers[6];
+	struct iwl_mvm_tof_data tof_data;
 };
 
 /* Extract MVM priv from op_mode and _hw */

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

@@ -259,6 +259,7 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 	RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 		   true),
 	RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
+	RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
 
 };
 #undef RX_HANDLER
@@ -574,6 +575,8 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 	/* rpm starts with a taken ref. only set the appropriate bit here. */
 	mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 
+	iwl_mvm_tof_init(mvm);
+
 	return op_mode;
 
  out_unregister:
@@ -621,6 +624,8 @@ static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 	for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 		kfree(mvm->nvm_sections[i].data);
 
+	iwl_mvm_tof_clean(mvm);
+
 	ieee80211_free_hw(mvm->hw);
 }
 

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

+/******************************************************************************
+ *
+ * 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) 2015 Intel Deutschland 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) 2015 Intel Deutschland 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.
+ *
+ *****************************************************************************/
+#include "mvm.h"
+#include "fw-api-tof.h"
+
+#define IWL_MVM_TOF_RANGE_REQ_MAX_ID 256
+
+void iwl_mvm_tof_init(struct iwl_mvm *mvm)
+{
+	struct iwl_mvm_tof_data *tof_data = &mvm->tof_data;
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return;
+
+	memset(tof_data, 0, sizeof(*tof_data));
+
+	tof_data->tof_cfg.hdr.size =
+		cpu_to_le16(sizeof(struct iwl_tof_config_cmd) -
+			    sizeof(struct iwl_mvm_umac_cmd_hdr));
+	tof_data->tof_cfg.sub_grp_cmd_id = cpu_to_le32(TOF_CONFIG_CMD);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (IWL_MVM_TOF_IS_RESPONDER) {
+		tof_data->responder_cfg.hdr.size =
+			cpu_to_le16(sizeof(struct iwl_tof_responder_config_cmd) -
+				    sizeof(struct iwl_mvm_umac_cmd_hdr));
+		tof_data->responder_cfg.sub_grp_cmd_id =
+			cpu_to_le32(TOF_RESPONDER_CONFIG_CMD);
+		tof_data->responder_cfg.sta_id = IWL_MVM_STATION_COUNT;
+	}
+#endif
+
+	tof_data->range_req.hdr.size =
+		cpu_to_le16(sizeof(struct iwl_tof_range_req_cmd) -
+			    sizeof(struct iwl_mvm_umac_cmd_hdr));
+	tof_data->range_req.sub_grp_cmd_id = cpu_to_le32(TOF_RANGE_REQ_CMD);
+	tof_data->range_req.req_timeout = 1;
+	tof_data->range_req.initiator = 1;
+	tof_data->range_req.report_policy = 3;
+
+	tof_data->range_req_ext.hdr.size =
+		cpu_to_le16(sizeof(struct iwl_tof_range_req_ext_cmd) -
+			    sizeof(struct iwl_mvm_umac_cmd_hdr));
+	tof_data->range_req_ext.sub_grp_cmd_id =
+		cpu_to_le32(TOF_RANGE_REQ_EXT_CMD);
+
+	mvm->tof_data.active_range_request = IWL_MVM_TOF_RANGE_REQ_MAX_ID;
+}
+
+void iwl_mvm_tof_clean(struct iwl_mvm *mvm)
+{
+	struct iwl_mvm_tof_data *tof_data = &mvm->tof_data;
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return;
+
+	memset(tof_data, 0, sizeof(*tof_data));
+	mvm->tof_data.active_range_request = IWL_MVM_TOF_RANGE_REQ_MAX_ID;
+}
+
+static void iwl_tof_iterator(void *_data, u8 *mac,
+			     struct ieee80211_vif *vif)
+{
+	bool *enabled = _data;
+
+	/* non bss vif exists */
+	if (ieee80211_vif_type_p2p(vif) !=  NL80211_IFTYPE_STATION)
+		*enabled = false;
+}
+
+int iwl_mvm_tof_config_cmd(struct iwl_mvm *mvm)
+{
+	struct iwl_tof_config_cmd *cmd = &mvm->tof_data.tof_cfg;
+	bool enabled;
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return -EINVAL;
+
+	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
+						   IEEE80211_IFACE_ITER_NORMAL,
+						   iwl_tof_iterator, &enabled);
+	if (!enabled) {
+		IWL_DEBUG_INFO(mvm, "ToF is not supported (non bss vif)\n");
+		return -EINVAL;
+	}
+
+	mvm->tof_data.active_range_request = IWL_MVM_TOF_RANGE_REQ_MAX_ID;
+	return iwl_mvm_send_cmd_pdu(mvm, TOF_CMD, 0, sizeof(*cmd), cmd);
+}
+
+int iwl_mvm_tof_range_abort_cmd(struct iwl_mvm *mvm, u8 id)
+{
+	struct iwl_tof_range_abort_cmd cmd = {
+		.sub_grp_cmd_id = cpu_to_le32(TOF_RANGE_ABORT_CMD),
+		.hdr.size = cpu_to_le16(sizeof(struct iwl_tof_range_abort_cmd) -
+					sizeof(struct iwl_mvm_umac_cmd_hdr)),
+		.request_id = id,
+	};
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return -EINVAL;
+
+	if (id != mvm->tof_data.active_range_request) {
+		IWL_ERR(mvm, "Invalid range request id %d (active %d)\n",
+			id, mvm->tof_data.active_range_request);
+		return -EINVAL;
+	}
+
+	/* after abort is sent there's no active request anymore */
+	mvm->tof_data.active_range_request = IWL_MVM_TOF_RANGE_REQ_MAX_ID;
+
+	return iwl_mvm_send_cmd_pdu(mvm, TOF_CMD, 0, sizeof(cmd), &cmd);
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+int iwl_mvm_tof_responder_cmd(struct iwl_mvm *mvm,
+			      struct ieee80211_vif *vif)
+{
+	struct iwl_tof_responder_config_cmd *cmd = &mvm->tof_data.responder_cfg;
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return -EINVAL;
+
+	if (vif->p2p || vif->type != NL80211_IFTYPE_AP) {
+		IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
+		return -EIO;
+	}
+
+	cmd->sta_id = mvmvif->bcast_sta.sta_id;
+	return iwl_mvm_send_cmd_pdu(mvm, TOF_CMD, 0, sizeof(*cmd), cmd);
+}
+#endif
+
+int iwl_mvm_tof_range_request_cmd(struct iwl_mvm *mvm,
+				  struct ieee80211_vif *vif)
+{
+	struct iwl_host_cmd cmd = {
+		.id = TOF_CMD,
+		.len = { sizeof(mvm->tof_data.range_req), },
+		/* no copy because of the command size */
+		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
+	};
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return -EINVAL;
+
+	if (ieee80211_vif_type_p2p(vif) !=  NL80211_IFTYPE_STATION) {
+		IWL_ERR(mvm, "Cannot send range request, not STA mode\n");
+		return -EIO;
+	}
+
+	/* nesting of range requests is not supported in FW */
+	if (mvm->tof_data.active_range_request !=
+		IWL_MVM_TOF_RANGE_REQ_MAX_ID) {
+		IWL_ERR(mvm, "Cannot send range req, already active req %d\n",
+			mvm->tof_data.active_range_request);
+		return -EIO;
+	}
+
+	mvm->tof_data.active_range_request = mvm->tof_data.range_req.request_id;
+
+	cmd.data[0] = &mvm->tof_data.range_req;
+	return iwl_mvm_send_cmd(mvm, &cmd);
+}
+
+int iwl_mvm_tof_range_request_ext_cmd(struct iwl_mvm *mvm,
+				      struct ieee80211_vif *vif)
+{
+	lockdep_assert_held(&mvm->mutex);
+
+	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TOF_SUPPORT))
+		return -EINVAL;
+
+	if (ieee80211_vif_type_p2p(vif) !=  NL80211_IFTYPE_STATION) {
+		IWL_ERR(mvm, "Cannot send ext range req, not in STA mode\n");
+		return -EIO;
+	}
+
+	return iwl_mvm_send_cmd_pdu(mvm, TOF_CMD, 0,
+				    sizeof(mvm->tof_data.range_req_ext),
+				    &mvm->tof_data.range_req_ext);
+}
+
+static int iwl_mvm_tof_range_resp(struct iwl_mvm *mvm, void *data)
+{
+	struct iwl_tof_range_rsp_ntfy *resp = (void *)data;
+
+	if (resp->request_id != mvm->tof_data.active_range_request) {
+		IWL_ERR(mvm, "Request id mismatch, got %d, active %d\n",
+			resp->request_id, mvm->tof_data.active_range_request);
+		return -EIO;
+	}
+
+	memcpy(&mvm->tof_data.range_resp, resp,
+	       sizeof(struct iwl_tof_range_rsp_ntfy));
+	mvm->tof_data.active_range_request = IWL_MVM_TOF_RANGE_REQ_MAX_ID;
+
+	return 0;
+}
+
+static int iwl_mvm_tof_mcsi_notif(struct iwl_mvm *mvm, void *data)
+{
+	struct iwl_tof_mcsi_notif *resp = (struct iwl_tof_mcsi_notif *)data;
+
+	IWL_DEBUG_INFO(mvm, "MCSI notification, token %d\n", resp->token);
+	return 0;
+}
+
+static int iwl_mvm_tof_nb_report_notif(struct iwl_mvm *mvm, void *data)
+{
+	struct iwl_tof_neighbor_report *report =
+		(struct iwl_tof_neighbor_report *)data;
+
+	IWL_DEBUG_INFO(mvm, "NB report, bssid %pM, token %d, status 0x%x\n",
+		       report->bssid, report->request_token, report->status);
+	return 0;
+}
+
+void iwl_mvm_tof_resp_handler(struct iwl_mvm *mvm,
+			      struct iwl_rx_cmd_buffer *rxb)
+{
+	struct iwl_rx_packet *pkt = rxb_addr(rxb);
+	struct iwl_tof_gen_resp_cmd *resp = (void *)pkt->data;
+
+	lockdep_assert_held(&mvm->mutex);
+
+	switch (le32_to_cpu(resp->sub_grp_cmd_id)) {
+	case TOF_RANGE_RESPONSE_NOTIF:
+		iwl_mvm_tof_range_resp(mvm, resp->data);
+		break;
+	case TOF_MCSI_DEBUG_NOTIF:
+		iwl_mvm_tof_mcsi_notif(mvm, resp->data);
+		break;
+	case TOF_NEIGHBOR_REPORT_RSP_NOTIF:
+		iwl_mvm_tof_nb_report_notif(mvm, resp->data);
+		break;
+	default:
+	       IWL_ERR(mvm, "Unknown sub-group command 0x%x\n",
+		       resp->sub_grp_cmd_id);
+	       break;
+	}
+}

drivers/net/wireless/iwlwifi/mvm/tof.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) 2015 Intel Deutschland 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) 2015 Intel Deutschland 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 __tof
+#define __tof_h__
+
+#include "fw-api-tof.h"
+
+struct iwl_mvm_tof_data {
+	struct iwl_tof_config_cmd tof_cfg;
+	struct iwl_tof_range_req_cmd range_req;
+	struct iwl_tof_range_req_ext_cmd range_req_ext;
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	struct iwl_tof_responder_config_cmd responder_cfg;
+#endif
+	struct iwl_tof_range_rsp_ntfy range_resp;
+	u8 last_abort_id;
+	u16 active_range_request;
+};
+
+void iwl_mvm_tof_init(struct iwl_mvm *mvm);
+void iwl_mvm_tof_clean(struct iwl_mvm *mvm);
+int iwl_mvm_tof_config_cmd(struct iwl_mvm *mvm);
+int iwl_mvm_tof_range_abort_cmd(struct iwl_mvm *mvm, u8 id);
+int iwl_mvm_tof_range_request_cmd(struct iwl_mvm *mvm,
+				  struct ieee80211_vif *vif);
+void iwl_mvm_tof_resp_handler(struct iwl_mvm *mvm,
+			      struct iwl_rx_cmd_buffer *rxb);
+int iwl_mvm_tof_range_request_ext_cmd(struct iwl_mvm *mvm,
+				      struct ieee80211_vif *vif);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+int iwl_mvm_tof_responder_cmd(struct iwl_mvm *mvm,
+			      struct ieee80211_vif *vif);
+#endif
+#endif /* __tof_h__ */