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
 68struct 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
 78static 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
117static 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
137static 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
179int 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
196int 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}