2  * Marvell 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.
1473  * This function converts radio type scan parameter to a band configuration
1489  * This is an internal function used to start a scan based on an input
1492  * This uses the input user scan configuration information when provided in
1493  * order to send the appropriate scan commands to firmware to populate or
1494  * update the internal driver scan table.
1512 			    "cmd: Scan already in process...\n");  in mwifiex_scan_networks()
1518 			    "cmd: Scan is blocked during association...\n");  in mwifiex_scan_networks()
1525 			    "Ignore scan. Card removed or firmware in bad state\n");  in mwifiex_scan_networks()
1557 	/* Get scan command from scan_pending_q and put to cmd_pending_q */  in mwifiex_scan_networks()
1569 			/* Perform internal scan synchronously */  in mwifiex_scan_networks()
1572 					    "wait internal scan\n");  in mwifiex_scan_networks()
1593  * This function prepares a scan command to be sent to the firmware.
1595  * This uses the scan command configuration sent to the command processing
1596  * module in command preparation stage to configure a scan command structure
1609 	struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;  in mwifiex_cmd_802_11_scan()
1611 	/* Set fixed field variables in scan command */  in mwifiex_cmd_802_11_scan()
1671 /* This function checks if any hidden SSID found in passive scan channels
1672  * and save those channels for specific SSID active scan
1805 	/* First 5 fields are bssid, RSSI(for legacy scan only),  in mwifiex_parse_single_response_buf()
1938 				    "complete internal scan\n");  in mwifiex_complete_scan()
1944 /* This function checks if any hidden SSID found in passive scan channels
1945  * and do specific SSID active scan for those channels
1991 		dev_err(priv->adapter->dev, "scan failed: %d\n", ret);  in mwifiex_active_scan_req_for_passive_chan()
2022 				    "info: notifying scan done\n");  in mwifiex_check_next_scan_command()
2029 				    "info: scan already aborted\n");  in mwifiex_check_next_scan_command()
2048 					    "info: aborting scan\n");  in mwifiex_check_next_scan_command()
2055 					    "info: scan already aborted\n");  in mwifiex_check_next_scan_command()
2059 		/* Get scan command from scan_pending_q and put to  in mwifiex_check_next_scan_command()
2094 					    "info: aborting scan\n");  in mwifiex_cancel_scan()
2104  * This function handles the command response of scan.
2106  * The response buffer for the scan command has the following
2159 	/* Check csa channel expiry before parsing scan response */  in mwifiex_ret_802_11_scan()
2190 	/* Search the TLV buffer space in the scan response for any valid  in mwifiex_ret_802_11_scan()
2197 	/* Search the TLV buffer space in the scan response for any valid  in mwifiex_ret_802_11_scan()
2221 		 * If the TSF TLV was appended to the scan results, save this  in mwifiex_ret_802_11_scan()
2264  * This function prepares an extended scan command to be sent to the firmware
2266  * This uses the scan command configuration sent to the command processing
2267  * module in command preparation stage to configure a extended scan command
2288 /* This function prepares an background scan config command to be sent
2321 	/*  stop sched scan  */  in mwifiex_cmd_802_11_bg_scan_config()
2381 		 * specific scan for the SSID filled, whereas  in mwifiex_cmd_802_11_bg_scan_config()
2383 		 * wildcard scan.  in mwifiex_cmd_802_11_bg_scan_config()
2553 /* This function handles the command response of extended scan */
2568 	mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");  in mwifiex_ret_802_11_scan_ext()
2582 				    "error processing scan response TLVs");  in mwifiex_ret_802_11_scan_ext()
2609 					    "Scan pending in command pending list");  in mwifiex_ret_802_11_scan_ext()
2624 /* This function This function handles the event extended scan report. It
2625  * parses extended scan results and informs to cfg80211 stack.
2729 		 * scan buffer withut any change  in mwifiex_handle_event_ext_scan_report()
2759  * This function prepares command for background scan query.
2763  *      - Setting background scan flush parameter
2781  * This function inserts scan command node to the scan pending queue.
2798  * This function sends a scan command for all available channels to the
2810 			    "cmd: Scan already in process...\n");  in mwifiex_scan_specific_ssid()
2816 			    "cmd: Scan is blocked during association...\n");  in mwifiex_scan_specific_ssid()
2834  * Sends IOCTL request to start a scan.
2839  * Scan command can be issued for both normal scan and specific SSID
2840  * scan, depending upon whether an SSID is provided or not.
2857 		/* Specific SSID scan */  in mwifiex_request_scan()
2860 		/* Normal scan */  in mwifiex_request_scan()
2885 	 * the selected(scan/assoc/adhoc) IE as TLV to the command  in mwifiex_cmd_append_vsie_tlv()
2921  *      - The current ssid was not found somehow in the last scan.
2922  *      - The current ssid was the last entry of the scan table and overloaded.