1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2020 Intel Corporation
4 * Copyright (C) 2016 Intel Deutschland GmbH
5 * Copyright (C) 2022 Intel Corporation
6 */
7 #include <net/mac80211.h>
8 #include "fw-api.h"
9 #include "mvm.h"
10
11 struct iwl_mvm_iface_iterator_data {
12 struct ieee80211_vif *ignore_vif;
13 int idx;
14
15 struct iwl_mvm_phy_ctxt *phyctxt;
16
17 u16 ids[MAX_MACS_IN_BINDING];
18 u16 colors[MAX_MACS_IN_BINDING];
19 };
20
iwl_mvm_binding_cmd(struct iwl_mvm * mvm,u32 action,struct iwl_mvm_iface_iterator_data * data)21 static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
22 struct iwl_mvm_iface_iterator_data *data)
23 {
24 struct iwl_binding_cmd cmd;
25 struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
26 int i, ret;
27 u32 status;
28 int size;
29
30 memset(&cmd, 0, sizeof(cmd));
31
32 if (fw_has_capa(&mvm->fw->ucode_capa,
33 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
34 size = sizeof(cmd);
35 cmd.lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm,
36 phyctxt->channel->band));
37 } else {
38 size = IWL_BINDING_CMD_SIZE_V1;
39 }
40
41 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
42 phyctxt->color));
43 cmd.action = cpu_to_le32(action);
44 cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
45 phyctxt->color));
46
47 for (i = 0; i < MAX_MACS_IN_BINDING; i++)
48 cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
49 for (i = 0; i < data->idx; i++)
50 cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
51 data->colors[i]));
52
53 status = 0;
54 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
55 size, &cmd, &status);
56 if (ret) {
57 IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
58 action, ret);
59 return ret;
60 }
61
62 if (status) {
63 IWL_ERR(mvm, "Binding command failed: %u\n", status);
64 ret = -EIO;
65 }
66
67 return ret;
68 }
69
iwl_mvm_iface_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)70 static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
71 struct ieee80211_vif *vif)
72 {
73 struct iwl_mvm_iface_iterator_data *data = _data;
74 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
75
76 if (vif == data->ignore_vif)
77 return;
78
79 if (mvmvif->deflink.phy_ctxt != data->phyctxt)
80 return;
81
82 if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
83 return;
84
85 data->ids[data->idx] = mvmvif->id;
86 data->colors[data->idx] = mvmvif->color;
87 data->idx++;
88 }
89
iwl_mvm_binding_update(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_phy_ctxt * phyctxt,bool add)90 static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
91 struct ieee80211_vif *vif,
92 struct iwl_mvm_phy_ctxt *phyctxt,
93 bool add)
94 {
95 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
96 struct iwl_mvm_iface_iterator_data data = {
97 .ignore_vif = vif,
98 .phyctxt = phyctxt,
99 };
100 u32 action = FW_CTXT_ACTION_MODIFY;
101
102 lockdep_assert_held(&mvm->mutex);
103
104 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
105 IEEE80211_IFACE_ITER_NORMAL,
106 iwl_mvm_iface_iterator,
107 &data);
108
109 /*
110 * If there are no other interfaces yet we
111 * need to create a new binding.
112 */
113 if (data.idx == 0) {
114 if (add)
115 action = FW_CTXT_ACTION_ADD;
116 else
117 action = FW_CTXT_ACTION_REMOVE;
118 }
119
120 if (add) {
121 if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
122 return -EINVAL;
123
124 data.ids[data.idx] = mvmvif->id;
125 data.colors[data.idx] = mvmvif->color;
126 data.idx++;
127 }
128
129 return iwl_mvm_binding_cmd(mvm, action, &data);
130 }
131
iwl_mvm_binding_add_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)132 int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
133 {
134 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
135
136 if (WARN_ON_ONCE(!mvmvif->deflink.phy_ctxt))
137 return -EINVAL;
138
139 /*
140 * Update SF - Disable if needed. if this fails, SF might still be on
141 * while many macs are bound, which is forbidden - so fail the binding.
142 */
143 if (iwl_mvm_sf_update(mvm, vif, false))
144 return -EINVAL;
145
146 return iwl_mvm_binding_update(mvm, vif, mvmvif->deflink.phy_ctxt,
147 true);
148 }
149
iwl_mvm_binding_remove_vif(struct iwl_mvm * mvm,struct ieee80211_vif * vif)150 int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
151 {
152 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
153 int ret;
154
155 if (WARN_ON_ONCE(!mvmvif->deflink.phy_ctxt))
156 return -EINVAL;
157
158 ret = iwl_mvm_binding_update(mvm, vif, mvmvif->deflink.phy_ctxt,
159 false);
160
161 if (!ret)
162 if (iwl_mvm_sf_update(mvm, vif, true))
163 IWL_ERR(mvm, "Failed to update SF state\n");
164
165 return ret;
166 }
167
iwl_mvm_get_lmac_id(struct iwl_mvm * mvm,enum nl80211_band band)168 u32 iwl_mvm_get_lmac_id(struct iwl_mvm *mvm, enum nl80211_band band)
169 {
170 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CDB_SUPPORT) ||
171 band == NL80211_BAND_2GHZ)
172 return IWL_LMAC_24G_INDEX;
173 return IWL_LMAC_5G_INDEX;
174 }
175