| Current File : //usr/include/linux/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 <[email protected]>
* Inaky Perez-Gonzalez <[email protected]>
* - 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__ */