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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
|
/******************************************************************************
*
* 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
* Copyright(c) 2017 Intel Deutschland GmbH
* Copyright(c) 2018 Intel Corporation
*
* 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.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@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
* Copyright(c) 2018 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 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.
*
*****************************************************************************/
#include <net/mac80211.h>
#include "fw-api.h"
#include "mvm.h"
/* Maps the driver specific channel width definition to the fw values */
u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
{
switch (chandef->width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
return PHY_VHT_CHANNEL_MODE20;
case NL80211_CHAN_WIDTH_40:
return PHY_VHT_CHANNEL_MODE40;
case NL80211_CHAN_WIDTH_80:
return PHY_VHT_CHANNEL_MODE80;
case NL80211_CHAN_WIDTH_160:
return PHY_VHT_CHANNEL_MODE160;
default:
WARN(1, "Invalid channel width=%u", chandef->width);
return PHY_VHT_CHANNEL_MODE20;
}
}
/*
* Maps the driver specific control channel position (relative to the center
* freq) definitions to the the fw values
*/
u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
{
switch (chandef->chan->center_freq - chandef->center_freq1) {
case -70:
return PHY_VHT_CTRL_POS_4_BELOW;
case -50:
return PHY_VHT_CTRL_POS_3_BELOW;
case -30:
return PHY_VHT_CTRL_POS_2_BELOW;
case -10:
return PHY_VHT_CTRL_POS_1_BELOW;
case 10:
return PHY_VHT_CTRL_POS_1_ABOVE;
case 30:
return PHY_VHT_CTRL_POS_2_ABOVE;
case 50:
return PHY_VHT_CTRL_POS_3_ABOVE;
case 70:
return PHY_VHT_CTRL_POS_4_ABOVE;
default:
WARN(1, "Invalid channel definition");
case 0:
/*
* The FW is expected to check the control channel position only
* when in HT/VHT and the channel width is not 20MHz. Return
* this value as the default one.
*/
return PHY_VHT_CTRL_POS_1_BELOW;
}
}
/*
* Construct the generic fields of the PHY context command
*/
static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
struct iwl_phy_context_cmd *cmd,
u32 action, u32 apply_time)
{
memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));
cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
ctxt->color));
cmd->action = cpu_to_le32(action);
cmd->apply_time = cpu_to_le32(apply_time);
}
/*
* Add the phy configuration to the PHY context command
*/
static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
struct iwl_phy_context_cmd *cmd,
struct cfg80211_chan_def *chandef,
u8 chains_static, u8 chains_dynamic)
{
u8 active_cnt, idle_cnt;
struct iwl_phy_context_cmd_tail *tail =
iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);
/* Set the channel info data */
iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
/* Set rx the chains */
idle_cnt = chains_static;
active_cnt = chains_dynamic;
/* In scenarios where we only ever use a single-stream rates,
* i.e. legacy 11b/g/a associations, single-stream APs or even
* static SMPS, enable both chains to get diversity, improving
* the case where we're far enough from the AP that attenuation
* between the two antennas is sufficiently different to impact
* performance.
*/
if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) {
idle_cnt = 2;
active_cnt = 2;
}
tail->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
PHY_RX_CHAIN_VALID_POS);
tail->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
tail->rxchain_info |= cpu_to_le32(active_cnt <<
PHY_RX_CHAIN_MIMO_CNT_POS);
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (unlikely(mvm->dbgfs_rx_phyinfo))
tail->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
#endif
tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
}
/*
* Send a command to apply the current phy configuration. The command is send
* only if something in the configuration changed: in case that this is the
* first time that the phy configuration is applied or in case that the phy
* configuration changed from the previous apply.
*/
static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
struct iwl_mvm_phy_ctxt *ctxt,
struct cfg80211_chan_def *chandef,
u8 chains_static, u8 chains_dynamic,
u32 action, u32 apply_time)
{
struct iwl_phy_context_cmd cmd;
int ret;
u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
/* Set the command header fields */
iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time);
/* Set the command data */
iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef,
chains_static, chains_dynamic);
ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0, len, &cmd);
if (ret)
IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
return ret;
}
/*
* Send a command to add a PHY context based on the current HW configuration.
*/
int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
struct cfg80211_chan_def *chandef,
u8 chains_static, u8 chains_dynamic)
{
WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
ctxt->ref);
lockdep_assert_held(&mvm->mutex);
ctxt->channel = chandef->chan;
return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
chains_static, chains_dynamic,
FW_CTXT_ACTION_ADD, 0);
}
/*
* Update the number of references to the given PHY context. This is valid only
* in case the PHY context was already created, i.e., its reference count > 0.
*/
void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
{
lockdep_assert_held(&mvm->mutex);
ctxt->ref++;
}
/*
* Send a command to modify the PHY context based on the current HW
* configuration. Note that the function does not check that the configuration
* changed.
*/
int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
struct cfg80211_chan_def *chandef,
u8 chains_static, u8 chains_dynamic)
{
enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
lockdep_assert_held(&mvm->mutex);
if (fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
ctxt->channel->band != chandef->chan->band) {
int ret;
/* ... remove it here ...*/
ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
chains_static, chains_dynamic,
FW_CTXT_ACTION_REMOVE, 0);
if (ret)
return ret;
/* ... and proceed to add it again */
action = FW_CTXT_ACTION_ADD;
}
ctxt->channel = chandef->chan;
ctxt->width = chandef->width;
return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
chains_static, chains_dynamic,
action, 0);
}
void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
{
lockdep_assert_held(&mvm->mutex);
if (WARN_ON_ONCE(!ctxt))
return;
ctxt->ref--;
/*
* Move unused phy's to a default channel. When the phy is moved the,
* fw will cleanup immediate quiet bit if it was previously set,
* otherwise we might not be able to reuse this phy.
*/
if (ctxt->ref == 0) {
struct ieee80211_channel *chan;
struct cfg80211_chan_def chandef;
chan = &mvm->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[0];
cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1);
}
}
static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
unsigned long *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (!mvmvif->phy_ctxt)
return;
if (vif->type == NL80211_IFTYPE_STATION ||
vif->type == NL80211_IFTYPE_AP)
__set_bit(mvmvif->phy_ctxt->id, data);
}
int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
{
unsigned long phy_ctxt_counter = 0;
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_binding_iterator,
&phy_ctxt_counter);
return hweight8(phy_ctxt_counter);
}
|