drivers/net/wireless/intel/iwlwifi/fw/api/cmdhdr.h

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <linuxwifi@intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  * BSD LICENSE
  29  *
  30  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  31  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  32  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  *
  39  *  * Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  *  * Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in
  43  *    the documentation and/or other materials provided with the
  44  *    distribution.
  45  *  * Neither the name Intel Corporation nor the names of its
  46  *    contributors may be used to endorse or promote products derived
  47  *    from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  50  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  51  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  52  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  53  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  54  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  55  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  56  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  57  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  58  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  59  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  60  *
  61  *****************************************************************************/
  62 #ifndef __iwl_fw_api_cmdhdr_h__
  63 #define __iwl_fw_api_cmdhdr_h__
  64
  65 /**
  66  * DOC: Host command section
  67  *
  68  * A host command is a command issued by the upper layer to the fw. There are
  69  * several versions of fw that have several APIs. The transport layer is
  70  * completely agnostic to these differences.
  71  * The transport does provide helper functionality (i.e. SYNC / ASYNC mode),
  72  */
  73 #define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f)
  74 #define QUEUE_TO_SEQ(q) (((q) & 0x1f) << 8)
  75 #define SEQ_TO_INDEX(s) ((s) & 0xff)
  76 #define INDEX_TO_SEQ(i) ((i) & 0xff)
  77 #define SEQ_RX_FRAME    cpu_to_le16(0x8000)
  78
  79 /*
  80  * those functions retrieve specific information from
  81  * the id field in the iwl_host_cmd struct which contains
  82  * the command id, the group id and the version of the command
  83  * and vice versa
  84 */
  85 static inline u8 iwl_cmd_opcode(u32 cmdid)
  86 {
  87         return cmdid & 0xFF;
  88 }
  89
  90 static inline u8 iwl_cmd_groupid(u32 cmdid)
  91 {
  92         return ((cmdid & 0xFF00) >> 8);
  93 }
  94
  95 static inline u8 iwl_cmd_version(u32 cmdid)
  96 {
  97         return ((cmdid & 0xFF0000) >> 16);
  98 }
  99
 100 static inline u32 iwl_cmd_id(u8 opcode, u8 groupid, u8 version)
 101 {
 102         return opcode + (groupid << 8) + (version << 16);
 103 }
 104
 105 /* make u16 wide id out of u8 group and opcode */
 106 #define WIDE_ID(grp, opcode) (((grp) << 8) | (opcode))
 107 #define DEF_ID(opcode) ((1 << 8) | (opcode))
 108
 109 /* due to the conversion, this group is special; new groups
 110  * should be defined in the appropriate fw-api header files
 111  */
 112 #define IWL_ALWAYS_LONG_GROUP   1
 113
 114 /**
 115  * struct iwl_cmd_header - (short) command header format
 116  *
 117  * This header format appears in the beginning of each command sent from the
 118  * driver, and each response/notification received from uCode.
 119  */
 120 struct iwl_cmd_header {
 121         /**
 122          * @cmd: Command ID: REPLY_RXON, etc.
 123          */
 124         u8 cmd;
 125         /**
 126          * @group_id: group ID, for commands with groups
 127          */
 128         u8 group_id;
 129         /**
 130          * @sequence:
 131          * Sequence number for the command.
 132          *
 133          * The driver sets up the sequence number to values of its choosing.
 134          * uCode does not use this value, but passes it back to the driver
 135          * when sending the response to each driver-originated command, so
 136          * the driver can match the response to the command.  Since the values
 137          * don't get used by uCode, the driver may set up an arbitrary format.
 138          *
 139          * There is one exception:  uCode sets bit 15 when it originates
 140          * the response/notification, i.e. when the response/notification
 141          * is not a direct response to a command sent by the driver.  For
 142          * example, uCode issues REPLY_RX when it sends a received frame
 143          * to the driver; it is not a direct response to any driver command.
 144          *
 145          * The Linux driver uses the following format:
 146          *
 147          *  0:7         tfd index - position within TX queue
 148          *  8:12        TX queue id
 149          *  13:14       reserved
 150          *  15          unsolicited RX or uCode-originated notification
 151          */
 152         __le16 sequence;
 153 } __packed;
 154
 155 /**
 156  * struct iwl_cmd_header_wide
 157  *
 158  * This header format appears in the beginning of each command sent from the
 159  * driver, and each response/notification received from uCode.
 160  * this is the wide version that contains more information about the command
 161  * like length, version and command type
 162  *
 163  * @cmd: command ID, like in &struct iwl_cmd_header
 164  * @group_id: group ID, like in &struct iwl_cmd_header
 165  * @sequence: sequence, like in &struct iwl_cmd_header
 166  * @length: length of the command
 167  * @reserved: reserved
 168  * @version: command version
 169  */
 170 struct iwl_cmd_header_wide {
 171         u8 cmd;
 172         u8 group_id;
 173         __le16 sequence;
 174         __le16 length;
 175         u8 reserved;
 176         u8 version;
 177 } __packed;
 178
 179 /**
 180  * struct iwl_calib_res_notif_phy_db - Receive phy db chunk after calibrations
 181  * @type: type of the result - mostly ignored
 182  * @length: length of the data
 183  * @data: data, length in @length
 184  */
 185 struct iwl_calib_res_notif_phy_db {
 186         __le16 type;
 187         __le16 length;
 188         u8 data[];
 189 } __packed;
 190
 191 /**
 192  * struct iwl_phy_db_cmd - configure operational ucode
 193  * @type: type of the data
 194  * @length: length of the data
 195  * @data: data, length in @length
 196  */
 197 struct iwl_phy_db_cmd {
 198         __le16 type;
 199         __le16 length;
 200         u8 data[];
 201 } __packed;
 202
 203 /**
 204  * struct iwl_cmd_response - generic response struct for most commands
 205  * @status: status of the command asked, changes for each one
 206  */
 207 struct iwl_cmd_response {
 208         __le32 status;
 209 };
 210
 211 #endif /* __iwl_fw_api_cmdhdr_h__ */