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 - 2014 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 - 2014 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_iface_iterator_data {
69 struct ieee80211_vif *ignore_vif;
70 int idx;
71
72 struct iwl_mvm_phy_ctxt *phyctxt;
73
74 u16 ids[MAX_MACS_IN_BINDING];
75 u16 colors[MAX_MACS_IN_BINDING];
76 };
77
iwl_mvm_binding_cmd(struct iwl_mvm * mvm,u32 action,struct iwl_mvm_iface_iterator_data * data)78 static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
79 struct iwl_mvm_iface_iterator_data *data)
80 {
81 struct iwl_binding_cmd cmd;
82 struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
83 int i, ret;
84 u32 status;
85
86 memset(&cmd, 0, sizeof(cmd));
87
88 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
89 phyctxt->color));
90 cmd.action = cpu_to_le32(action);
91 cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
92 phyctxt->color));
93
94 for (i = 0; i < MAX_MACS_IN_BINDING; i++)
95 cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
96 for (i = 0; i < data->idx; i++)
97 cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
98 data->colors[i]));
99
100 status = 0;
101 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
102 sizeof(cmd), &cmd, &status);
103 if (ret) {
104 IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
105 action, ret);
106 return ret;
107 }
108
109 if (status) {
110 IWL_ERR(mvm, "Binding command failed: %u\n", status);
111 ret = -EIO;
112 }
113
114 return ret;
115 }
116
iwl_mvm_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)117 static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
118 struct ieee80211_vif *vif)
119 {
120 struct iwl_mvm_iface_iterator_data *data = _data;
121 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
122
123 if (vif == data->ignore_vif)
124 return;
125
126 if (mvmvif->phy_ctxt != data->phyctxt)
127 return;
128
129 if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
130 return;
131
132 data->ids[data->idx] = mvmvif->id;
133 data->colors[data->idx] = mvmvif->color;
134 data->idx++;
135 }
136
iwl_mvm_binding_update(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_phy_ctxt * phyctxt,bool add)137 static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
138 struct ieee80211_vif *vif,
139 struct iwl_mvm_phy_ctxt *phyctxt,
140 bool add)
141 {
142 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
143 struct iwl_mvm_iface_iterator_data data = {
144 .ignore_vif = vif,
145 .phyctxt = phyctxt,
146 };
147 u32 action = FW_CTXT_ACTION_MODIFY;
148
149 lockdep_assert_held(&mvm->mutex);
150
151 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
152 IEEE80211_IFACE_ITER_NORMAL,
153 iwl_mvm_iface_iterator,
154 &data);
155
156 /*
157 * If there are no other interfaces yet we
158 * need to create a new binding.
159 */
160 if (data.idx == 0) {
161 if (add)
162 action = FW_CTXT_ACTION_ADD;
163 else
164 action = FW_CTXT_ACTION_REMOVE;
165 }
166
167 if (add) {
168 if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
169 return -EINVAL;
170
171 data.ids[data.idx] = mvmvif->id;
172 data.colors[data.idx] = mvmvif->color;
173 data.idx++;
174 }
175
176 return iwl_mvm_binding_cmd(mvm, action, &data);
177 }
178
iwl_mvm_binding_add_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)179 int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
180 {
181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
182
183 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
184 return -EINVAL;
185
186 /*
187 * Update SF - Disable if needed. if this fails, SF might still be on
188 * while many macs are bound, which is forbidden - so fail the binding.
189 */
190 if (iwl_mvm_sf_update(mvm, vif, false))
191 return -EINVAL;
192
193 return iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, true);
194 }
195
iwl_mvm_binding_remove_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)196 int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
197 {
198 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
199 int ret;
200
201 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
202 return -EINVAL;
203
204 ret = iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, false);
205
206 if (!ret)
207 if (iwl_mvm_sf_update(mvm, vif, true))
208 IWL_ERR(mvm, "Failed to update SF state\n");
209
210 return ret;
211 }
212