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