1 /******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63
64 #include <net/mac80211.h>
65 #include "fw-api.h"
66 #include "mvm.h"
67
68 struct iwl_mvm_quota_iterator_data {
69 int n_interfaces[MAX_BINDINGS];
70 int colors[MAX_BINDINGS];
71 struct ieee80211_vif *new_vif;
72 };
73
iwl_mvm_quota_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)74 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
75 struct ieee80211_vif *vif)
76 {
77 struct iwl_mvm_quota_iterator_data *data = _data;
78 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
79 u16 id;
80
81 /*
82 * We'll account for the new interface (if any) below,
83 * skip it here in case we're not called from within
84 * the add_interface callback (otherwise it won't show
85 * up in iteration)
86 */
87 if (vif == data->new_vif)
88 return;
89
90 if (!mvmvif->phy_ctxt)
91 return;
92
93 /* currently, PHY ID == binding ID */
94 id = mvmvif->phy_ctxt->id;
95
96 /* need at least one binding per PHY */
97 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
98
99 if (WARN_ON_ONCE(id >= MAX_BINDINGS))
100 return;
101
102 if (data->colors[id] < 0)
103 data->colors[id] = mvmvif->phy_ctxt->color;
104 else
105 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
106
107 switch (vif->type) {
108 case NL80211_IFTYPE_STATION:
109 if (vif->bss_conf.assoc)
110 data->n_interfaces[id]++;
111 break;
112 case NL80211_IFTYPE_AP:
113 if (mvmvif->ap_active)
114 data->n_interfaces[id]++;
115 break;
116 case NL80211_IFTYPE_MONITOR:
117 if (mvmvif->monitor_active)
118 data->n_interfaces[id]++;
119 break;
120 case NL80211_IFTYPE_P2P_DEVICE:
121 break;
122 case NL80211_IFTYPE_ADHOC:
123 if (vif->bss_conf.ibss_joined)
124 data->n_interfaces[id]++;
125 break;
126 default:
127 WARN_ON_ONCE(1);
128 break;
129 }
130 }
131
iwl_mvm_update_quotas(struct iwl_mvm * mvm,struct ieee80211_vif * newvif)132 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
133 {
134 struct iwl_time_quota_cmd cmd;
135 int i, idx, ret, num_active_bindings, quota, quota_rem;
136 struct iwl_mvm_quota_iterator_data data = {
137 .n_interfaces = {},
138 .colors = { -1, -1, -1, -1 },
139 .new_vif = newvif,
140 };
141
142 /* update all upon completion */
143 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
144 return 0;
145
146 BUILD_BUG_ON(data.colors[MAX_BINDINGS - 1] != -1);
147
148 lockdep_assert_held(&mvm->mutex);
149
150 memset(&cmd, 0, sizeof(cmd));
151
152 ieee80211_iterate_active_interfaces_atomic(
153 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
154 iwl_mvm_quota_iterator, &data);
155 if (newvif) {
156 data.new_vif = NULL;
157 iwl_mvm_quota_iterator(&data, newvif->addr, newvif);
158 }
159
160 /*
161 * The FW's scheduling session consists of
162 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
163 * equally between all the bindings that require quota
164 */
165 num_active_bindings = 0;
166 for (i = 0; i < MAX_BINDINGS; i++) {
167 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
168 if (data.n_interfaces[i] > 0)
169 num_active_bindings++;
170 }
171
172 if (!num_active_bindings)
173 goto send_cmd;
174
175 quota = IWL_MVM_MAX_QUOTA / num_active_bindings;
176 quota_rem = IWL_MVM_MAX_QUOTA % num_active_bindings;
177
178 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
179 if (data.n_interfaces[i] <= 0)
180 continue;
181
182 cmd.quotas[idx].id_and_color =
183 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
184 cmd.quotas[idx].quota = cpu_to_le32(quota);
185 cmd.quotas[idx].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
186 idx++;
187 }
188
189 /* Give the remainder of the session to the first binding */
190 le32_add_cpu(&cmd.quotas[0].quota, quota_rem);
191
192 send_cmd:
193 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
194 sizeof(cmd), &cmd);
195 if (ret)
196 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
197 return ret;
198 }
199