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
11struct 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
21static 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
70static 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
90static 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
132int 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
150int 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
168u32 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