Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 9f6b77af2f6ddf547cb133ca8994aab9d63c0034 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 * 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__ */