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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