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wimax.h
/* * Linux WiMax * API for user space * * * Copyright (C) 2007-2008 Intel Corporation. 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 of 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. * * * Intel Corporation <linux-wimax@intel.com> * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> * - Initial implementation * * * This file declares the user/kernel protocol that is spoken over * Generic Netlink, as well as any type declaration that is to be used * by kernel and user space. * * It is intended for user space to clone it verbatim to use it as a * primary reference for definitions. * * Stuff intended for kernel usage as well as full protocol and stack * documentation is rooted in include/net/wimax.h. */ #ifndef __LINUX__WIMAX_H__ #define __LINUX__WIMAX_H__ #include <linux/types.h> enum { /** * Version of the interface (unsigned decimal, MMm, max 25.5) * M - Major: change if removing or modifying an existing call. * m - minor: change when adding a new call */ WIMAX_GNL_VERSION = 01, /* Generic NetLink attributes */ WIMAX_GNL_ATTR_INVALID = 0x00, WIMAX_GNL_ATTR_MAX = 10, }; /* * Generic NetLink operations * * Most of these map to an API call; _OP_ stands for operation, _RP_ * for reply and _RE_ for report (aka: signal). */ enum { WIMAX_GNL_OP_MSG_FROM_USER, /* User to kernel message */ WIMAX_GNL_OP_MSG_TO_USER, /* Kernel to user message */ WIMAX_GNL_OP_RFKILL, /* Run wimax_rfkill() */ WIMAX_GNL_OP_RESET, /* Run wimax_rfkill() */ WIMAX_GNL_RE_STATE_CHANGE, /* Report: status change */ WIMAX_GNL_OP_STATE_GET, /* Request for current state */ }; /* Message from user / to user */ enum { WIMAX_GNL_MSG_IFIDX = 1, WIMAX_GNL_MSG_PIPE_NAME, WIMAX_GNL_MSG_DATA, }; /* * wimax_rfkill() * * The state of the radio (ON/OFF) is mapped to the rfkill subsystem's * switch state (DISABLED/ENABLED). */ enum wimax_rf_state { WIMAX_RF_OFF = 0, /* Radio is off, rfkill on/enabled */ WIMAX_RF_ON = 1, /* Radio is on, rfkill off/disabled */ WIMAX_RF_QUERY = 2, }; /* Attributes */ enum { WIMAX_GNL_RFKILL_IFIDX = 1, WIMAX_GNL_RFKILL_STATE, }; /* Attributes for wimax_reset() */ enum { WIMAX_GNL_RESET_IFIDX = 1, }; /* Attributes for wimax_state_get() */ enum { WIMAX_GNL_STGET_IFIDX = 1, }; /* * Attributes for the Report State Change * * For now we just have the old and new states; new attributes might * be added later on. */ enum { WIMAX_GNL_STCH_IFIDX = 1, WIMAX_GNL_STCH_STATE_OLD, WIMAX_GNL_STCH_STATE_NEW, }; /** * enum wimax_st - The different states of a WiMAX device * @__WIMAX_ST_NULL: The device structure has been allocated and zeroed, * but still wimax_dev_add() hasn't been called. There is no state. * * @WIMAX_ST_DOWN: The device has been registered with the WiMAX and * networking stacks, but it is not initialized (normally that is * done with 'ifconfig DEV up' [or equivalent], which can upload * firmware and enable communications with the device). * In this state, the device is powered down and using as less * power as possible. * This state is the default after a call to wimax_dev_add(). It * is ok to have drivers move directly to %WIMAX_ST_UNINITIALIZED * or %WIMAX_ST_RADIO_OFF in _probe() after the call to * wimax_dev_add(). * It is recommended that the driver leaves this state when * calling 'ifconfig DEV up' and enters it back on 'ifconfig DEV * down'. * * @__WIMAX_ST_QUIESCING: The device is being torn down, so no API * operations are allowed to proceed except the ones needed to * complete the device clean up process. * * @WIMAX_ST_UNINITIALIZED: [optional] Communication with the device * is setup, but the device still requires some configuration * before being operational. * Some WiMAX API calls might work. * * @WIMAX_ST_RADIO_OFF: The device is fully up; radio is off (wether * by hardware or software switches). * It is recommended to always leave the device in this state * after initialization. * * @WIMAX_ST_READY: The device is fully up and radio is on. * * @WIMAX_ST_SCANNING: [optional] The device has been instructed to * scan. In this state, the device cannot be actively connected to * a network. * * @WIMAX_ST_CONNECTING: The device is connecting to a network. This * state exists because in some devices, the connect process can * include a number of negotiations between user space, kernel * space and the device. User space needs to know what the device * is doing. If the connect sequence in a device is atomic and * fast, the device can transition directly to CONNECTED * * @WIMAX_ST_CONNECTED: The device is connected to a network. * * @__WIMAX_ST_INVALID: This is an invalid state used to mark the * maximum numeric value of states. * * Description: * * Transitions from one state to another one are atomic and can only * be caused in kernel space with wimax_state_change(). To read the * state, use wimax_state_get(). * * States starting with __ are internal and shall not be used or * referred to by drivers or userspace. They look ugly, but that's the * point -- if any use is made non-internal to the stack, it is easier * to catch on review. * * All API operations [with well defined exceptions] will take the * device mutex before starting and then check the state. If the state * is %__WIMAX_ST_NULL, %WIMAX_ST_DOWN, %WIMAX_ST_UNINITIALIZED or * %__WIMAX_ST_QUIESCING, it will drop the lock and quit with * -%EINVAL, -%ENOMEDIUM, -%ENOTCONN or -%ESHUTDOWN. * * The order of the definitions is important, so we can do numerical * comparisons (eg: < %WIMAX_ST_RADIO_OFF means the device is not ready * to operate). */ /* * The allowed state transitions are described in the table below * (states in rows can go to states in columns where there is an X): * * UNINI RADIO READY SCAN CONNEC CONNEC * NULL DOWN QUIESCING TIALIZED OFF NING TING TED * NULL - x * DOWN - x x x * QUIESCING x - * UNINITIALIZED x - x * RADIO_OFF x - x * READY x x - x x x * SCANNING x x x - x x * CONNECTING x x x x - x * CONNECTED x x x - * * This table not available in kernel-doc because the formatting messes it up. */ enum wimax_st { __WIMAX_ST_NULL = 0, WIMAX_ST_DOWN, __WIMAX_ST_QUIESCING, WIMAX_ST_UNINITIALIZED, WIMAX_ST_RADIO_OFF, WIMAX_ST_READY, WIMAX_ST_SCANNING, WIMAX_ST_CONNECTING, WIMAX_ST_CONNECTED, __WIMAX_ST_INVALID /* Always keep last */ }; #endif /* #ifndef __LINUX__WIMAX_H__ */
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