1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 *****************************************************************************/
68 #include <net/mac80211.h>
72 #define QUOTA_100 IWL_MVM_MAX_QUOTA
73 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
75 struct iwl_mvm_quota_iterator_data
{
76 int n_interfaces
[MAX_BINDINGS
];
77 int colors
[MAX_BINDINGS
];
78 int low_latency
[MAX_BINDINGS
];
79 #ifdef CONFIG_IWLWIFI_DEBUGFS
80 int dbgfs_min
[MAX_BINDINGS
];
82 int n_low_latency_bindings
;
83 struct ieee80211_vif
*disabled_vif
;
86 static void iwl_mvm_quota_iterator(void *_data
, u8
*mac
,
87 struct ieee80211_vif
*vif
)
89 struct iwl_mvm_quota_iterator_data
*data
= _data
;
90 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
93 /* skip disabled interfaces here immediately */
94 if (vif
== data
->disabled_vif
)
97 if (!mvmvif
->phy_ctxt
)
100 /* currently, PHY ID == binding ID */
101 id
= mvmvif
->phy_ctxt
->id
;
103 /* need at least one binding per PHY */
104 BUILD_BUG_ON(NUM_PHY_CTX
> MAX_BINDINGS
);
106 if (WARN_ON_ONCE(id
>= MAX_BINDINGS
))
110 case NL80211_IFTYPE_STATION
:
111 if (vif
->bss_conf
.assoc
)
114 case NL80211_IFTYPE_AP
:
115 case NL80211_IFTYPE_ADHOC
:
116 if (mvmvif
->ap_ibss_active
)
119 case NL80211_IFTYPE_MONITOR
:
120 if (mvmvif
->monitor_active
)
123 case NL80211_IFTYPE_P2P_DEVICE
:
130 if (data
->colors
[id
] < 0)
131 data
->colors
[id
] = mvmvif
->phy_ctxt
->color
;
133 WARN_ON_ONCE(data
->colors
[id
] != mvmvif
->phy_ctxt
->color
);
135 data
->n_interfaces
[id
]++;
137 #ifdef CONFIG_IWLWIFI_DEBUGFS
138 if (mvmvif
->dbgfs_quota_min
)
139 data
->dbgfs_min
[id
] = max(data
->dbgfs_min
[id
],
140 mvmvif
->dbgfs_quota_min
);
143 if (iwl_mvm_vif_low_latency(mvmvif
) && !data
->low_latency
[id
]) {
144 data
->n_low_latency_bindings
++;
145 data
->low_latency
[id
] = true;
149 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm
*mvm
,
150 struct iwl_time_quota_cmd
*cmd
)
152 #ifdef CONFIG_NL80211_TESTMODE
153 struct iwl_mvm_vif
*mvmvif
;
154 int i
, phy_id
= -1, beacon_int
= 0;
156 if (!mvm
->noa_duration
|| !mvm
->noa_vif
)
159 mvmvif
= iwl_mvm_vif_from_mac80211(mvm
->noa_vif
);
160 if (!mvmvif
->ap_ibss_active
)
163 phy_id
= mvmvif
->phy_ctxt
->id
;
164 beacon_int
= mvm
->noa_vif
->bss_conf
.beacon_int
;
166 for (i
= 0; i
< MAX_BINDINGS
; i
++) {
167 u32 id_n_c
= le32_to_cpu(cmd
->quotas
[i
].id_and_color
);
168 u32 id
= (id_n_c
& FW_CTXT_ID_MSK
) >> FW_CTXT_ID_POS
;
169 u32 quota
= le32_to_cpu(cmd
->quotas
[i
].quota
);
174 quota
*= (beacon_int
- mvm
->noa_duration
);
177 IWL_DEBUG_QUOTA(mvm
, "quota: adjust for NoA from %d to %d\n",
178 le32_to_cpu(cmd
->quotas
[i
].quota
), quota
);
180 cmd
->quotas
[i
].quota
= cpu_to_le32(quota
);
185 int iwl_mvm_update_quotas(struct iwl_mvm
*mvm
,
187 struct ieee80211_vif
*disabled_vif
)
189 struct iwl_time_quota_cmd cmd
= {};
190 int i
, idx
, err
, num_active_macs
, quota
, quota_rem
, n_non_lowlat
;
191 struct iwl_mvm_quota_iterator_data data
= {
193 .colors
= { -1, -1, -1, -1 },
194 .disabled_vif
= disabled_vif
,
196 struct iwl_time_quota_cmd
*last
= &mvm
->last_quota_cmd
;
199 lockdep_assert_held(&mvm
->mutex
);
201 /* update all upon completion */
202 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART
, &mvm
->status
))
205 /* iterator data above must match */
206 BUILD_BUG_ON(MAX_BINDINGS
!= 4);
208 ieee80211_iterate_active_interfaces_atomic(
209 mvm
->hw
, IEEE80211_IFACE_ITER_NORMAL
,
210 iwl_mvm_quota_iterator
, &data
);
213 * The FW's scheduling session consists of
214 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
215 * equally between all the bindings that require quota
218 for (i
= 0; i
< MAX_BINDINGS
; i
++) {
219 cmd
.quotas
[i
].id_and_color
= cpu_to_le32(FW_CTXT_INVALID
);
220 num_active_macs
+= data
.n_interfaces
[i
];
223 n_non_lowlat
= num_active_macs
;
225 if (data
.n_low_latency_bindings
== 1) {
226 for (i
= 0; i
< MAX_BINDINGS
; i
++) {
227 if (data
.low_latency
[i
]) {
228 n_non_lowlat
-= data
.n_interfaces
[i
];
234 if (data
.n_low_latency_bindings
== 1 && n_non_lowlat
) {
236 * Reserve quota for the low latency binding in case that
237 * there are several data bindings but only a single
238 * low latency one. Split the rest of the quota equally
239 * between the other data interfaces.
241 quota
= (QUOTA_100
- QUOTA_LOWLAT_MIN
) / n_non_lowlat
;
242 quota_rem
= QUOTA_100
- n_non_lowlat
* quota
-
245 "quota: low-latency binding active, remaining quota per other binding: %d\n",
247 } else if (num_active_macs
) {
249 * There are 0 or more than 1 low latency bindings, or all the
250 * data interfaces belong to the single low latency binding.
251 * Split the quota equally between the data interfaces.
253 quota
= QUOTA_100
/ num_active_macs
;
254 quota_rem
= QUOTA_100
% num_active_macs
;
256 "quota: splitting evenly per binding: %d\n",
259 /* values don't really matter - won't be used */
264 for (idx
= 0, i
= 0; i
< MAX_BINDINGS
; i
++) {
265 if (data
.colors
[i
] < 0)
268 cmd
.quotas
[idx
].id_and_color
=
269 cpu_to_le32(FW_CMD_ID_AND_COLOR(i
, data
.colors
[i
]));
271 if (data
.n_interfaces
[i
] <= 0)
272 cmd
.quotas
[idx
].quota
= cpu_to_le32(0);
273 #ifdef CONFIG_IWLWIFI_DEBUGFS
274 else if (data
.dbgfs_min
[i
])
275 cmd
.quotas
[idx
].quota
=
276 cpu_to_le32(data
.dbgfs_min
[i
] * QUOTA_100
/ 100);
278 else if (data
.n_low_latency_bindings
== 1 && n_non_lowlat
&&
281 * There is more than one binding, but only one of the
282 * bindings is in low latency. For this case, allocate
283 * the minimal required quota for the low latency
286 cmd
.quotas
[idx
].quota
= cpu_to_le32(QUOTA_LOWLAT_MIN
);
288 cmd
.quotas
[idx
].quota
=
289 cpu_to_le32(quota
* data
.n_interfaces
[i
]);
291 WARN_ONCE(le32_to_cpu(cmd
.quotas
[idx
].quota
) > QUOTA_100
,
292 "Binding=%d, quota=%u > max=%u\n",
293 idx
, le32_to_cpu(cmd
.quotas
[idx
].quota
), QUOTA_100
);
295 cmd
.quotas
[idx
].max_duration
= cpu_to_le32(0);
300 /* Give the remainder of the session to the first data binding */
301 for (i
= 0; i
< MAX_BINDINGS
; i
++) {
302 if (le32_to_cpu(cmd
.quotas
[i
].quota
) != 0) {
303 le32_add_cpu(&cmd
.quotas
[i
].quota
, quota_rem
);
305 "quota: giving remainder of %d to binding %d\n",
311 iwl_mvm_adjust_quota_for_noa(mvm
, &cmd
);
313 /* check that we have non-zero quota for all valid bindings */
314 for (i
= 0; i
< MAX_BINDINGS
; i
++) {
315 if (cmd
.quotas
[i
].id_and_color
!= last
->quotas
[i
].id_and_color
)
317 if (cmd
.quotas
[i
].max_duration
!= last
->quotas
[i
].max_duration
)
319 if (abs((int)le32_to_cpu(cmd
.quotas
[i
].quota
) -
320 (int)le32_to_cpu(last
->quotas
[i
].quota
))
321 > IWL_MVM_QUOTA_THRESHOLD
)
323 if (cmd
.quotas
[i
].id_and_color
== cpu_to_le32(FW_CTXT_INVALID
))
325 WARN_ONCE(cmd
.quotas
[i
].quota
== 0,
326 "zero quota on binding %d\n", i
);
329 if (!send
&& !force_update
) {
330 /* don't send a practically unchanged command, the firmware has
331 * to re-initialize a lot of state and that can have an adverse
337 err
= iwl_mvm_send_cmd_pdu(mvm
, TIME_QUOTA_CMD
, 0, sizeof(cmd
), &cmd
);
340 IWL_ERR(mvm
, "Failed to send quota: %d\n", err
);
342 mvm
->last_quota_cmd
= cmd
;