235 lines
8 KiB
C
235 lines
8 KiB
C
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/*
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* Linux WiMax
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* API for user space
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*
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*
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* Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* Intel Corporation <linux-wimax@intel.com>
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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* - Initial implementation
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*
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*
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* This file declares the user/kernel protocol that is spoken over
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* Generic Netlink, as well as any type declaration that is to be used
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* by kernel and user space.
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*
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* It is intended for user space to clone it verbatim to use it as a
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* primary reference for definitions.
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*
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* Stuff intended for kernel usage as well as full protocol and stack
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* documentation is rooted in include/net/wimax.h.
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*/
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#ifndef __LINUX__WIMAX_H__
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#define __LINUX__WIMAX_H__
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#include <linux/types.h>
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enum {
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/**
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* Version of the interface (unsigned decimal, MMm, max 25.5)
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* M - Major: change if removing or modifying an existing call.
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* m - minor: change when adding a new call
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*/
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WIMAX_GNL_VERSION = 00,
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/* Generic NetLink attributes */
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WIMAX_GNL_ATTR_INVALID = 0x00,
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WIMAX_GNL_ATTR_MAX = 10,
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};
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/*
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* Generic NetLink operations
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*
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* Most of these map to an API call; _OP_ stands for operation, _RP_
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* for reply and _RE_ for report (aka: signal).
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*/
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enum {
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WIMAX_GNL_OP_MSG_FROM_USER, /* User to kernel message */
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WIMAX_GNL_OP_MSG_TO_USER, /* Kernel to user message */
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WIMAX_GNL_OP_RFKILL, /* Run wimax_rfkill() */
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WIMAX_GNL_OP_RESET, /* Run wimax_rfkill() */
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WIMAX_GNL_RE_STATE_CHANGE, /* Report: status change */
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};
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/* Message from user / to user */
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enum {
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WIMAX_GNL_MSG_IFIDX = 1,
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WIMAX_GNL_MSG_PIPE_NAME,
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WIMAX_GNL_MSG_DATA,
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};
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/*
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* wimax_rfkill()
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*
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* The state of the radio (ON/OFF) is mapped to the rfkill subsystem's
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* switch state (DISABLED/ENABLED).
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*/
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enum wimax_rf_state {
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WIMAX_RF_OFF = 0, /* Radio is off, rfkill on/enabled */
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WIMAX_RF_ON = 1, /* Radio is on, rfkill off/disabled */
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WIMAX_RF_QUERY = 2,
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};
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/* Attributes */
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enum {
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WIMAX_GNL_RFKILL_IFIDX = 1,
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WIMAX_GNL_RFKILL_STATE,
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};
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/* Attributes for wimax_reset() */
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enum {
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WIMAX_GNL_RESET_IFIDX = 1,
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};
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/*
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* Attributes for the Report State Change
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*
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* For now we just have the old and new states; new attributes might
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* be added later on.
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*/
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enum {
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WIMAX_GNL_STCH_IFIDX = 1,
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WIMAX_GNL_STCH_STATE_OLD,
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WIMAX_GNL_STCH_STATE_NEW,
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};
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/**
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* enum wimax_st - The different states of a WiMAX device
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* @__WIMAX_ST_NULL: The device structure has been allocated and zeroed,
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* but still wimax_dev_add() hasn't been called. There is no state.
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*
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* @WIMAX_ST_DOWN: The device has been registered with the WiMAX and
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* networking stacks, but it is not initialized (normally that is
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* done with 'ifconfig DEV up' [or equivalent], which can upload
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* firmware and enable communications with the device).
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* In this state, the device is powered down and using as less
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* power as possible.
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* This state is the default after a call to wimax_dev_add(). It
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* is ok to have drivers move directly to %WIMAX_ST_UNINITIALIZED
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* or %WIMAX_ST_RADIO_OFF in _probe() after the call to
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* wimax_dev_add().
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* It is recommended that the driver leaves this state when
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* calling 'ifconfig DEV up' and enters it back on 'ifconfig DEV
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* down'.
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*
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* @__WIMAX_ST_QUIESCING: The device is being torn down, so no API
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* operations are allowed to proceed except the ones needed to
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* complete the device clean up process.
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*
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* @WIMAX_ST_UNINITIALIZED: [optional] Communication with the device
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* is setup, but the device still requires some configuration
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* before being operational.
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* Some WiMAX API calls might work.
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*
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* @WIMAX_ST_RADIO_OFF: The device is fully up; radio is off (wether
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* by hardware or software switches).
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* It is recommended to always leave the device in this state
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* after initialization.
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*
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* @WIMAX_ST_READY: The device is fully up and radio is on.
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*
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* @WIMAX_ST_SCANNING: [optional] The device has been instructed to
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* scan. In this state, the device cannot be actively connected to
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* a network.
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*
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* @WIMAX_ST_CONNECTING: The device is connecting to a network. This
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* state exists because in some devices, the connect process can
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* include a number of negotiations between user space, kernel
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* space and the device. User space needs to know what the device
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* is doing. If the connect sequence in a device is atomic and
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* fast, the device can transition directly to CONNECTED
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*
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* @WIMAX_ST_CONNECTED: The device is connected to a network.
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*
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* @__WIMAX_ST_INVALID: This is an invalid state used to mark the
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* maximum numeric value of states.
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*
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* Description:
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*
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* Transitions from one state to another one are atomic and can only
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* be caused in kernel space with wimax_state_change(). To read the
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* state, use wimax_state_get().
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*
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* States starting with __ are internal and shall not be used or
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* referred to by drivers or userspace. They look ugly, but that's the
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* point -- if any use is made non-internal to the stack, it is easier
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* to catch on review.
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*
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* All API operations [with well defined exceptions] will take the
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* device mutex before starting and then check the state. If the state
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* is %__WIMAX_ST_NULL, %WIMAX_ST_DOWN, %WIMAX_ST_UNINITIALIZED or
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* %__WIMAX_ST_QUIESCING, it will drop the lock and quit with
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* -%EINVAL, -%ENOMEDIUM, -%ENOTCONN or -%ESHUTDOWN.
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*
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* The order of the definitions is important, so we can do numerical
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* comparisons (eg: < %WIMAX_ST_RADIO_OFF means the device is not ready
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* to operate).
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*/
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/*
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* The allowed state transitions are described in the table below
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* (states in rows can go to states in columns where there is an X):
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*
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* UNINI RADIO READY SCAN CONNEC CONNEC
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* NULL DOWN QUIESCING TIALIZED OFF NING TING TED
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* NULL - x
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* DOWN - x x x
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* QUIESCING x -
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* UNINITIALIZED x - x
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* RADIO_OFF x - x
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* READY x x - x x x
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* SCANNING x x x - x x
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* CONNECTING x x x x - x
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* CONNECTED x x x -
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*
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* This table not available in kernel-doc because the formatting messes it up.
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*/
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enum wimax_st {
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__WIMAX_ST_NULL = 0,
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WIMAX_ST_DOWN,
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__WIMAX_ST_QUIESCING,
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WIMAX_ST_UNINITIALIZED,
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WIMAX_ST_RADIO_OFF,
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WIMAX_ST_READY,
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WIMAX_ST_SCANNING,
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WIMAX_ST_CONNECTING,
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WIMAX_ST_CONNECTED,
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__WIMAX_ST_INVALID /* Always keep last */
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};
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#endif /* #ifndef __LINUX__WIMAX_H__ */
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