2  * NXP Wireless LAN device driver: scan ioctl and command handling
28 /* The maximum number of channels the firmware can scan per command */
33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
43 	scan */
59 	/* Scan configuration (variable length) */
448  * This function creates a channel list for the driver to scan, based
451  * This routine is used for any scan that is not provided with a
452  * specific channel list to scan.
575 /* This function appends rate TLV to scan config command. */
608  * This function constructs and sends multiple scan config commands to
611  * Previous routines in the code flow have created a scan command configuration
613  * channels supported per scan lists and sends the portion of the channel TLV,
635 			    "info: Scan: Null detect: %p, %p, %p\n",  in mwifiex_scan_channel_list()
640 	/* Check csa channel expiry before preparing scan list */  in mwifiex_scan_channel_list()
649 	/* Loop through the desired channel list, sending a new firmware scan  in mwifiex_scan_channel_list()
662 		 * Construct the Channel TLV for the scan command.  Continue to  in mwifiex_scan_channel_list()
664 		 *   - the tlv_idx hits the maximum configured per scan command  in mwifiex_scan_channel_list()
680 				    "info: Scan: Chan(%3d), Radio(%d),\t"  in mwifiex_scan_channel_list()
721 			/* Count the total scan time per command */  in mwifiex_scan_channel_list()
750 		/* The total scan time should be less than scan command timeout  in mwifiex_scan_channel_list()
754 				    "total scan time %dms\t"  in mwifiex_scan_channel_list()
755 				    "is over limit (%dms), scan skipped\n",  in mwifiex_scan_channel_list()
767 		/* Send the scan command to the firmware with the specified  in mwifiex_scan_channel_list()
777 		/* rate IE is updated per scan command but same starting  in mwifiex_scan_channel_list()
797  * This function constructs a scan command configuration structure to use
798  * in scan commands.
801  * with a scan configuration supplied in a user scan configuration structure.
802  * This structure is used as the basis of one or many scan command configuration
806  * This function creates a scan command configuration structure  based on the
845 	/* The tlv_buf_len is calculated for each scan command.  The TLVs added  in mwifiex_config_scan()
857 	/* Initialize the scan as un-filtered; the flag is later set to TRUE  in mwifiex_config_scan()
861 	/* Initialize the scan as not being only on the current channel.  If  in mwifiex_config_scan()
871 		   of an SSID list before marking the scan as filtered */  in mwifiex_config_scan()
874 		/* Set the BSS type scan filter, use Adapter setting if  in mwifiex_config_scan()
919 			 * specific scan for the SSID filled, whereas  in mwifiex_config_scan()
921 			 * wildcard scan.  in mwifiex_config_scan()
940 				    "info: scan: ssid[%d]: %s, %d\n",  in mwifiex_config_scan()
946 			   not treat the scan as  in mwifiex_config_scan()
955 		 *  truncate scan results.  That is not an issue with an SSID  in mwifiex_config_scan()
956 		 *  or BSSID filter applied to the scan results in the firmware.  in mwifiex_config_scan()
965 				    "info: scan: channel gap = %d\n",  in mwifiex_config_scan()
999 	 *  scan command will be increased to the absolute maximum.  in mwifiex_config_scan()
1025 			    "info: scan: num_probes = %d\n",  in mwifiex_config_scan()
1059 	 *   Channel TLVs will be added past this for each scan command,  in mwifiex_config_scan()
1068 			    "info: Scan: Using supplied channel list\n");  in mwifiex_config_scan()
1119 				    "info: Scan: Scanning current channel only\n");  in mwifiex_config_scan()
1123 			    "info: Scan: Creating full region channel list\n");  in mwifiex_config_scan()
1132  * This function inspects the scan response buffer for pointers to
1135  * TLVs can be included at the end of the scan response BSS information.
1471  * This function converts radio type scan parameter to a band configuration
1487  * This is an internal function used to start a scan based on an input
1490  * This uses the input user scan configuration information when provided in
1491  * order to send the appropriate scan commands to firmware to populate or
1492  * update the internal driver scan table.
1509 			    "cmd: Scan already in process...\n");  in mwifiex_scan_networks()
1515 			    "cmd: Scan is blocked during association...\n");  in mwifiex_scan_networks()
1522 			    "Ignore scan. Card removed or firmware in bad state\n");  in mwifiex_scan_networks()
1554 	/* Get scan command from scan_pending_q and put to cmd_pending_q */  in mwifiex_scan_networks()
1565 			/* Perform internal scan synchronously */  in mwifiex_scan_networks()
1568 					    "wait internal scan\n");  in mwifiex_scan_networks()
1588  * This function prepares a scan command to be sent to the firmware.
1590  * This uses the scan command configuration sent to the command processing
1591  * module in command preparation stage to configure a scan command structure
1604 	struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;  in mwifiex_cmd_802_11_scan()
1606 	/* Set fixed field variables in scan command */  in mwifiex_cmd_802_11_scan()
1666 /* This function checks if any hidden SSID found in passive scan channels
1667  * and save those channels for specific SSID active scan
1799 	/* First 5 fields are bssid, RSSI(for legacy scan only),  in mwifiex_parse_single_response_buf()
1932 				    "complete internal scan\n");  in mwifiex_complete_scan()
1938 /* This function checks if any hidden SSID found in passive scan channels
1939  * and do specific SSID active scan for those channels
1985 		dev_err(priv->adapter->dev, "scan failed: %d\n", ret);  in mwifiex_active_scan_req_for_passive_chan()
2015 				    "info: notifying scan done\n");  in mwifiex_check_next_scan_command()
2022 				    "info: scan already aborted\n");  in mwifiex_check_next_scan_command()
2041 					    "info: aborting scan\n");  in mwifiex_check_next_scan_command()
2048 					    "info: scan already aborted\n");  in mwifiex_check_next_scan_command()
2052 		/* Get scan command from scan_pending_q and put to  in mwifiex_check_next_scan_command()
2086 					    "info: aborting scan\n");  in mwifiex_cancel_scan()
2096  * This function handles the command response of scan.
2098  * The response buffer for the scan command has the following
2151 	/* Check csa channel expiry before parsing scan response */  in mwifiex_ret_802_11_scan()
2182 	/* Search the TLV buffer space in the scan response for any valid  in mwifiex_ret_802_11_scan()
2189 	/* Search the TLV buffer space in the scan response for any valid  in mwifiex_ret_802_11_scan()
2213 		 * If the TSF TLV was appended to the scan results, save this  in mwifiex_ret_802_11_scan()
2256  * This function prepares an extended scan command to be sent to the firmware
2258  * This uses the scan command configuration sent to the command processing
2259  * module in command preparation stage to configure a extended scan command
2280 /* This function prepares an background scan config command to be sent
2313 	/*  stop sched scan  */  in mwifiex_cmd_802_11_bg_scan_config()
2373 		 * specific scan for the SSID filled, whereas  in mwifiex_cmd_802_11_bg_scan_config()
2375 		 * wildcard scan.  in mwifiex_cmd_802_11_bg_scan_config()
2545 /* This function handles the command response of extended scan */
2559 	mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");  in mwifiex_ret_802_11_scan_ext()
2573 				    "error processing scan response TLVs");  in mwifiex_ret_802_11_scan_ext()
2600 					    "Scan pending in command pending list");  in mwifiex_ret_802_11_scan_ext()
2615 /* This function This function handles the event extended scan report. It
2616  * parses extended scan results and informs to cfg80211 stack.
2720 		 * scan buffer withut any change  in mwifiex_handle_event_ext_scan_report()
2750  * This function prepares command for background scan query.
2754  *      - Setting background scan flush parameter
2772  * This function inserts scan command node to the scan pending queue.
2788  * This function sends a scan command for all available channels to the
2800 			    "cmd: Scan already in process...\n");  in mwifiex_scan_specific_ssid()
2806 			    "cmd: Scan is blocked during association...\n");  in mwifiex_scan_specific_ssid()
2824  * Sends IOCTL request to start a scan.
2829  * Scan command can be issued for both normal scan and specific SSID
2830  * scan, depending upon whether an SSID is provided or not.
2847 		/* Specific SSID scan */  in mwifiex_request_scan()
2850 		/* Normal scan */  in mwifiex_request_scan()
2875 	 * the selected(scan/assoc/adhoc) IE as TLV to the command  in mwifiex_cmd_append_vsie_tlv()
2911  *      - The current ssid was not found somehow in the last scan.
2912  *      - The current ssid was the last entry of the scan table and overloaded.