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
 10struct 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
 20static 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
 69static 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
 89static 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
131int 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
148int 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}