drivers/net/wireless/intel/iwlwifi/mvm/binding.c

   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, 2024 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
  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
  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
  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
 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
 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 && iwl_mvm_sf_update(mvm, vif, true))
 162                 IWL_ERR(mvm, "Failed to update SF state\n");
 163
 164         return ret;
 165 }
 166
 167 u32 iwl_mvm_get_lmac_id(struct iwl_mvm *mvm, enum nl80211_band band)
 168 {
 169         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CDB_SUPPORT) ||
 170             band == NL80211_BAND_2GHZ)
 171                 return IWL_LMAC_24G_INDEX;
 172         return IWL_LMAC_5G_INDEX;
 173 }