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
240
241
242
243
244
245
246
247
248
249
250
|
/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
* 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 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.
*
*****************************************************************************/
#ifndef __time_event_h__
#define __time_event_h__
#include "fw-api.h"
#include "mvm.h"
/**
* DOC: Time Events - what is it?
*
* Time Events are a fw feature that allows the driver to control the presence
* of the device on the channel. Since the fw supports multiple channels
* concurrently, the fw may choose to jump to another channel at any time.
* In order to make sure that the fw is on a specific channel at a certain time
* and for a certain duration, the driver needs to issue a time event.
*
* The simplest example is for BSS association. The driver issues a time event,
* waits for it to start, and only then tells mac80211 that we can start the
* association. This way, we make sure that the association will be done
* smoothly and won't be interrupted by channel switch decided within the fw.
*/
/**
* DOC: The flow against the fw
*
* When the driver needs to make sure we are in a certain channel, at a certain
* time and for a certain duration, it sends a Time Event. The flow against the
* fw goes like this:
* 1) Driver sends a TIME_EVENT_CMD to the fw
* 2) Driver gets the response for that command. This response contains the
* Unique ID (UID) of the event.
* 3) The fw sends notification when the event starts.
*
* Of course the API provides various options that allow to cover parameters
* of the flow.
* What is the duration of the event?
* What is the start time of the event?
* Is there an end-time for the event?
* How much can the event be delayed?
* Can the event be split?
* If yes what is the maximal number of chunks?
* etc...
*/
/**
* DOC: Abstraction to the driver
*
* In order to simplify the use of time events to the rest of the driver,
* we abstract the use of time events. This component provides the functions
* needed by the driver.
*/
#define IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS 500
#define IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS 400
/**
* iwl_mvm_protect_session - start / extend the session protection.
* @mvm: the mvm component
* @vif: the virtual interface for which the session is issued
* @duration: the duration of the session in TU.
* @min_duration: will start a new session if the current session will end
* in less than min_duration.
* @max_delay: maximum delay before starting the time event (in TU)
* @wait_for_notif: true if it is required that a time event notification be
* waited for (that the time event has been scheduled before returning)
*
* This function can be used to start a session protection which means that the
* fw will stay on the channel for %duration_ms milliseconds. This function
* can block (sleep) until the session starts. This function can also be used
* to extend a currently running session.
* This function is meant to be used for BSS association for example, where we
* want to make sure that the fw stays on the channel during the association.
*/
void iwl_mvm_protect_session(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 duration, u32 min_duration,
u32 max_delay, bool wait_for_notif);
/**
* iwl_mvm_stop_session_protection - cancel the session protection.
* @mvm: the mvm component
* @vif: the virtual interface for which the session is issued
*
* This functions cancels the session protection which is an act of good
* citizenship. If it is not needed any more it should be cancelled because
* the other bindings wait for the medium during that time.
* This funtions doesn't sleep.
*/
void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
struct ieee80211_vif *vif);
/*
* iwl_mvm_rx_time_event_notif - handles %TIME_EVENT_NOTIFICATION.
*/
int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
/**
* iwl_mvm_start_p2p_roc - start remain on channel for p2p device functionlity
* @mvm: the mvm component
* @vif: the virtual interface for which the roc is requested. It is assumed
* that the vif type is NL80211_IFTYPE_P2P_DEVICE
* @duration: the requested duration in millisecond for the fw to be on the
* channel that is bound to the vif.
* @type: the remain on channel request type
*
* This function can be used to issue a remain on channel session,
* which means that the fw will stay in the channel for the request %duration
* milliseconds. The function is async, meaning that it only issues the ROC
* request but does not wait for it to start. Once the FW is ready to serve the
* ROC request, it will issue a notification to the driver that it is on the
* requested channel. Once the FW completes the ROC request it will issue
* another notification to the driver.
*/
int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
int duration, enum ieee80211_roc_type type);
/**
* iwl_mvm_stop_roc - stop remain on channel functionality
* @mvm: the mvm component
*
* This function can be used to cancel an ongoing ROC session.
* The function is async, it will instruct the FW to stop serving the ROC
* session, but will not wait for the actual stopping of the session.
*/
void iwl_mvm_stop_roc(struct iwl_mvm *mvm);
/**
* iwl_mvm_remove_time_event - general function to clean up of time event
* @mvm: the mvm component
* @vif: the vif to which the time event belongs
* @te_data: the time event data that corresponds to that time event
*
* This function can be used to cancel a time event regardless its type.
* It is useful for cleaning up time events running before removing an
* interface.
*/
void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
struct iwl_mvm_vif *mvmvif,
struct iwl_mvm_time_event_data *te_data);
/**
* iwl_mvm_te_clear_data - remove time event from list
* @mvm: the mvm component
* @te_data: the time event data to remove
*
* This function is mostly internal, it is made available here only
* for firmware restart purposes.
*/
void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
struct iwl_mvm_time_event_data *te_data);
void iwl_mvm_roc_done_wk(struct work_struct *wk);
/**
* iwl_mvm_schedule_csa_period - request channel switch absence period
* @mvm: the mvm component
* @vif: the virtual interface for which the channel switch is issued
* @duration: the duration of the NoA in TU.
* @apply_time: NoA start time in GP2.
*
* This function is used to schedule NoA time event and is used to perform
* the channel switch flow.
*/
int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 duration, u32 apply_time);
/**
* iwl_mvm_te_scheduled - check if the fw received the TE cmd
* @te_data: the time event data that corresponds to that time event
*
* This function returns true iff this TE is added to the fw.
*/
static inline bool
iwl_mvm_te_scheduled(struct iwl_mvm_time_event_data *te_data)
{
if (!te_data)
return false;
return !!te_data->uid;
}
#endif /* __time_event_h__ */
|
