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 * Copyright(c) 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
30 * Copyright(c) 2016 Intel Deutschland GmbH
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 *
37 * * Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
42 * distribution.
43 * * Neither the name Intel Corporation nor the names of its
44 * contributors may be used to endorse or promote products derived
45 * from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 *
59 *****************************************************************************/
60
61 #include <net/mac80211.h>
62 #include "fw-api.h"
63 #include "mvm.h"
64
65 struct iwl_mvm_iface_iterator_data {
66 struct ieee80211_vif *ignore_vif;
67 int idx;
68
69 struct iwl_mvm_phy_ctxt *phyctxt;
70
71 u16 ids[MAX_MACS_IN_BINDING];
72 u16 colors[MAX_MACS_IN_BINDING];
73 };
74
75 static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
76 struct iwl_mvm_iface_iterator_data *data)
77 {
78 struct iwl_binding_cmd cmd;
79 struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
80 int i, ret;
81 u32 status;
82 int size;
83
84 memset(&cmd, 0, sizeof(cmd));
85
86 if (fw_has_capa(&mvm->fw->ucode_capa,
87 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
88 size = sizeof(cmd);
89 if (phyctxt->channel->band == NL80211_BAND_2GHZ ||
90 !iwl_mvm_is_cdb_supported(mvm))
91 cmd.lmac_id = cpu_to_le32(IWL_LMAC_24G_INDEX);
92 else
93 cmd.lmac_id = cpu_to_le32(IWL_LMAC_5G_INDEX);
94 } else {
95 size = IWL_BINDING_CMD_SIZE_V1;
96 }
97
98 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
99 phyctxt->color));
100 cmd.action = cpu_to_le32(action);
101 cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
102 phyctxt->color));
103
104 for (i = 0; i < MAX_MACS_IN_BINDING; i++)
105 cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
106 for (i = 0; i < data->idx; i++)
107 cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
108 data->colors[i]));
109
110 status = 0;
111 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
112 size, &cmd, &status);
113 if (ret) {
114 IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
115 action, ret);
116 return ret;
117 }
118
119 if (status) {
120 IWL_ERR(mvm, "Binding command failed: %u\n", status);
121 ret = -EIO;
122 }
123
124 return ret;
125 }
126
127 static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
128 struct ieee80211_vif *vif)
129 {
130 struct iwl_mvm_iface_iterator_data *data = _data;
131 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
132
133 if (vif == data->ignore_vif)
134 return;
135
136 if (mvmvif->phy_ctxt != data->phyctxt)
137 return;
138
139 if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
140 return;
141
142 data->ids[data->idx] = mvmvif->id;
143 data->colors[data->idx] = mvmvif->color;
144 data->idx++;
145 }
146
147 static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
148 struct ieee80211_vif *vif,
149 struct iwl_mvm_phy_ctxt *phyctxt,
150 bool add)
151 {
152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
153 struct iwl_mvm_iface_iterator_data data = {
154 .ignore_vif = vif,
155 .phyctxt = phyctxt,
156 };
157 u32 action = FW_CTXT_ACTION_MODIFY;
158
159 lockdep_assert_held(&mvm->mutex);
160
161 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
162 IEEE80211_IFACE_ITER_NORMAL,
163 iwl_mvm_iface_iterator,
164 &data);
165
166 /*
167 * If there are no other interfaces yet we
168 * need to create a new binding.
169 */
170 if (data.idx == 0) {
171 if (add)
172 action = FW_CTXT_ACTION_ADD;
173 else
174 action = FW_CTXT_ACTION_REMOVE;
175 }
176
177 if (add) {
178 if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
179 return -EINVAL;
180
181 data.ids[data.idx] = mvmvif->id;
182 data.colors[data.idx] = mvmvif->color;
183 data.idx++;
184 }
185
186 return iwl_mvm_binding_cmd(mvm, action, &data);
187 }
188
189 int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
190 {
191 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
192
193 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
194 return -EINVAL;
195
196 /*
197 * Update SF - Disable if needed. if this fails, SF might still be on
198 * while many macs are bound, which is forbidden - so fail the binding.
199 */
200 if (iwl_mvm_sf_update(mvm, vif, false))
201 return -EINVAL;
202
203 return iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, true);
204 }
205
206 int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
207 {
208 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
209 int ret;
210
211 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
212 return -EINVAL;
213
214 ret = iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, false);
215
216 if (!ret)
217 if (iwl_mvm_sf_update(mvm, vif, true))
218 IWL_ERR(mvm, "Failed to update SF state\n");
219
220 return ret;
221 }