summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/intel/iwlwifi/mvm/binding.c
blob: 0aac306304cbaa2927a099b92bf9e99551777fae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Copyright (C) 2012-2014, 2020 Intel Corporation
 * Copyright (C) 2016 Intel Deutschland GmbH
 */
#include <net/mac80211.h>
#include "fw-api.h"
#include "mvm.h"

struct iwl_mvm_iface_iterator_data {
	struct ieee80211_vif *ignore_vif;
	int idx;

	struct iwl_mvm_phy_ctxt *phyctxt;

	u16 ids[MAX_MACS_IN_BINDING];
	u16 colors[MAX_MACS_IN_BINDING];
};

static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
			       struct iwl_mvm_iface_iterator_data *data)
{
	struct iwl_binding_cmd cmd;
	struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
	int i, ret;
	u32 status;
	int size;

	memset(&cmd, 0, sizeof(cmd));

	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
		size = sizeof(cmd);
		cmd.lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw,
							      phyctxt->channel->band));
	} else {
		size = IWL_BINDING_CMD_SIZE_V1;
	}

	cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
							   phyctxt->color));
	cmd.action = cpu_to_le32(action);
	cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
						  phyctxt->color));

	for (i = 0; i < MAX_MACS_IN_BINDING; i++)
		cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
	for (i = 0; i < data->idx; i++)
		cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
							      data->colors[i]));

	status = 0;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
					  size, &cmd, &status);
	if (ret) {
		IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
			action, ret);
		return ret;
	}

	if (status) {
		IWL_ERR(mvm, "Binding command failed: %u\n", status);
		ret = -EIO;
	}

	return ret;
}

static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
				   struct ieee80211_vif *vif)
{
	struct iwl_mvm_iface_iterator_data *data = _data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (vif == data->ignore_vif)
		return;

	if (mvmvif->phy_ctxt != data->phyctxt)
		return;

	if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
		return;

	data->ids[data->idx] = mvmvif->id;
	data->colors[data->idx] = mvmvif->color;
	data->idx++;
}

static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
				  struct ieee80211_vif *vif,
				  struct iwl_mvm_phy_ctxt *phyctxt,
				  bool add)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_iface_iterator_data data = {
		.ignore_vif = vif,
		.phyctxt = phyctxt,
	};
	u32 action = FW_CTXT_ACTION_MODIFY;

	lockdep_assert_held(&mvm->mutex);

	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   iwl_mvm_iface_iterator,
						   &data);

	/*
	 * If there are no other interfaces yet we
	 * need to create a new binding.
	 */
	if (data.idx == 0) {
		if (add)
			action = FW_CTXT_ACTION_ADD;
		else
			action = FW_CTXT_ACTION_REMOVE;
	}

	if (add) {
		if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
			return -EINVAL;

		data.ids[data.idx] = mvmvif->id;
		data.colors[data.idx] = mvmvif->color;
		data.idx++;
	}

	return iwl_mvm_binding_cmd(mvm, action, &data);
}

int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
		return -EINVAL;

	/*
	 * Update SF - Disable if needed. if this fails, SF might still be on
	 * while many macs are bound, which is forbidden - so fail the binding.
	 */
	if (iwl_mvm_sf_update(mvm, vif, false))
		return -EINVAL;

	return iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, true);
}

int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
		return -EINVAL;

	ret = iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, false);

	if (!ret)
		if (iwl_mvm_sf_update(mvm, vif, true))
			IWL_ERR(mvm, "Failed to update SF state\n");

	return ret;
}