1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2022 - 2023 Intel Corporation 4 */ 5 #include "mvm.h" 6 #include "time-event.h" 7 8 static u32 iwl_mvm_get_free_fw_link_id(struct iwl_mvm *mvm, 9 struct iwl_mvm_vif *mvm_vif) 10 { 11 u32 link_id; 12 13 lockdep_assert_held(&mvm->mutex); 14 15 link_id = ffz(mvm->fw_link_ids_map); 16 17 /* this case can happen if there're deactivated but not removed links */ 18 if (link_id > IWL_MVM_FW_MAX_LINK_ID) 19 return IWL_MVM_FW_LINK_ID_INVALID; 20 21 mvm->fw_link_ids_map |= BIT(link_id); 22 return link_id; 23 } 24 25 static void iwl_mvm_release_fw_link_id(struct iwl_mvm *mvm, u32 link_id) 26 { 27 lockdep_assert_held(&mvm->mutex); 28 29 if (!WARN_ON(link_id > IWL_MVM_FW_MAX_LINK_ID)) 30 mvm->fw_link_ids_map &= ~BIT(link_id); 31 } 32 33 static int iwl_mvm_link_cmd_send(struct iwl_mvm *mvm, 34 struct iwl_link_config_cmd *cmd, 35 enum iwl_ctxt_action action) 36 { 37 int ret; 38 39 cmd->action = cpu_to_le32(action); 40 ret = iwl_mvm_send_cmd_pdu(mvm, 41 WIDE_ID(MAC_CONF_GROUP, LINK_CONFIG_CMD), 0, 42 sizeof(*cmd), cmd); 43 if (ret) 44 IWL_ERR(mvm, "Failed to send LINK_CONFIG_CMD (action:%d): %d\n", 45 action, ret); 46 return ret; 47 } 48 49 int iwl_mvm_add_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 50 struct ieee80211_bss_conf *link_conf) 51 { 52 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 53 unsigned int link_id = link_conf->link_id; 54 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 55 struct iwl_link_config_cmd cmd = {}; 56 57 if (WARN_ON_ONCE(!link_info)) 58 return -EINVAL; 59 60 if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) { 61 link_info->fw_link_id = iwl_mvm_get_free_fw_link_id(mvm, 62 mvmvif); 63 if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) 64 return -EINVAL; 65 66 rcu_assign_pointer(mvm->link_id_to_link_conf[link_info->fw_link_id], 67 link_conf); 68 } 69 70 /* Update SF - Disable if needed. if this fails, SF might still be on 71 * while many macs are bound, which is forbidden - so fail the binding. 72 */ 73 if (iwl_mvm_sf_update(mvm, vif, false)) 74 return -EINVAL; 75 76 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 77 cmd.mac_id = cpu_to_le32(mvmvif->id); 78 cmd.spec_link_id = link_conf->link_id; 79 WARN_ON_ONCE(link_info->phy_ctxt); 80 cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID); 81 82 memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN); 83 84 if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid) 85 memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN); 86 87 cmd.listen_lmac = cpu_to_le32(link_info->listen_lmac); 88 89 return iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_ADD); 90 } 91 92 int iwl_mvm_link_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 93 struct ieee80211_bss_conf *link_conf, 94 u32 changes, bool active) 95 { 96 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 97 unsigned int link_id = link_conf->link_id; 98 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 99 struct iwl_mvm_phy_ctxt *phyctxt; 100 struct iwl_link_config_cmd cmd = {}; 101 u32 ht_flag, flags = 0, flags_mask = 0; 102 int ret; 103 104 if (WARN_ON_ONCE(!link_info || 105 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 106 return -EINVAL; 107 108 if (changes & LINK_CONTEXT_MODIFY_ACTIVE) { 109 /* When activating a link, phy context should be valid; 110 * when deactivating a link, it also should be valid since 111 * the link was active before. So, do nothing in this case. 112 * Since a link is added first with FW_CTXT_INVALID, then we 113 * can get here in case it's removed before it was activated. 114 */ 115 if (!link_info->phy_ctxt) 116 return 0; 117 118 /* Catch early if driver tries to activate or deactivate a link 119 * twice. 120 */ 121 WARN_ON_ONCE(active == link_info->active); 122 123 /* When deactivating a link session protection should 124 * be stopped 125 */ 126 if (!active && vif->type == NL80211_IFTYPE_STATION) 127 iwl_mvm_stop_session_protection(mvm, vif); 128 } 129 130 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 131 132 /* The phy_id, link address and listen_lmac can be modified only until 133 * the link becomes active, otherwise they will be ignored. 134 */ 135 phyctxt = link_info->phy_ctxt; 136 if (phyctxt) 137 cmd.phy_id = cpu_to_le32(phyctxt->id); 138 else 139 cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID); 140 cmd.mac_id = cpu_to_le32(mvmvif->id); 141 142 memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN); 143 144 cmd.active = cpu_to_le32(active); 145 146 if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid) 147 memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN); 148 149 iwl_mvm_set_fw_basic_rates(mvm, vif, link_conf, 150 &cmd.cck_rates, &cmd.ofdm_rates); 151 152 cmd.cck_short_preamble = cpu_to_le32(link_conf->use_short_preamble); 153 cmd.short_slot = cpu_to_le32(link_conf->use_short_slot); 154 155 /* The fw does not distinguish between ht and fat */ 156 ht_flag = LINK_PROT_FLG_HT_PROT | LINK_PROT_FLG_FAT_PROT; 157 iwl_mvm_set_fw_protection_flags(mvm, vif, link_conf, 158 &cmd.protection_flags, 159 ht_flag, LINK_PROT_FLG_TGG_PROTECT); 160 161 iwl_mvm_set_fw_qos_params(mvm, vif, link_conf, cmd.ac, 162 &cmd.qos_flags); 163 164 165 cmd.bi = cpu_to_le32(link_conf->beacon_int); 166 cmd.dtim_interval = cpu_to_le32(link_conf->beacon_int * 167 link_conf->dtim_period); 168 169 if (!link_conf->he_support || iwlwifi_mod_params.disable_11ax || 170 (vif->type == NL80211_IFTYPE_STATION && !vif->cfg.assoc)) { 171 changes &= ~LINK_CONTEXT_MODIFY_HE_PARAMS; 172 goto send_cmd; 173 } 174 175 cmd.htc_trig_based_pkt_ext = link_conf->htc_trig_based_pkt_ext; 176 177 if (link_conf->uora_exists) { 178 cmd.rand_alloc_ecwmin = 179 link_conf->uora_ocw_range & 0x7; 180 cmd.rand_alloc_ecwmax = 181 (link_conf->uora_ocw_range >> 3) & 0x7; 182 } 183 184 /* TODO how to set ndp_fdbk_buff_th_exp? */ 185 186 if (iwl_mvm_set_fw_mu_edca_params(mvm, mvmvif->link[link_id], 187 &cmd.trig_based_txf[0])) { 188 flags |= LINK_FLG_MU_EDCA_CW; 189 flags_mask |= LINK_FLG_MU_EDCA_CW; 190 } 191 192 if (changes & LINK_CONTEXT_MODIFY_EHT_PARAMS) { 193 if (iwlwifi_mod_params.disable_11be || 194 !link_conf->eht_support) 195 changes &= ~LINK_CONTEXT_MODIFY_EHT_PARAMS; 196 else 197 cmd.puncture_mask = 198 cpu_to_le16(link_conf->eht_puncturing); 199 } 200 201 cmd.bss_color = link_conf->he_bss_color.color; 202 203 if (!link_conf->he_bss_color.enabled) { 204 flags |= LINK_FLG_BSS_COLOR_DIS; 205 flags_mask |= LINK_FLG_BSS_COLOR_DIS; 206 } 207 208 cmd.frame_time_rts_th = cpu_to_le16(link_conf->frame_time_rts_th); 209 210 /* Block 26-tone RU OFDMA transmissions */ 211 if (link_info->he_ru_2mhz_block) { 212 flags |= LINK_FLG_RU_2MHZ_BLOCK; 213 flags_mask |= LINK_FLG_RU_2MHZ_BLOCK; 214 } 215 216 if (link_conf->nontransmitted) { 217 ether_addr_copy(cmd.ref_bssid_addr, 218 link_conf->transmitter_bssid); 219 cmd.bssid_index = link_conf->bssid_index; 220 } 221 222 send_cmd: 223 cmd.modify_mask = cpu_to_le32(changes); 224 cmd.flags = cpu_to_le32(flags); 225 cmd.flags_mask = cpu_to_le32(flags_mask); 226 cmd.spec_link_id = link_conf->link_id; 227 cmd.listen_lmac = cpu_to_le32(link_info->listen_lmac); 228 229 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_MODIFY); 230 if (!ret && (changes & LINK_CONTEXT_MODIFY_ACTIVE)) 231 link_info->active = active; 232 233 return ret; 234 } 235 236 int iwl_mvm_remove_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 237 struct ieee80211_bss_conf *link_conf) 238 { 239 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 240 unsigned int link_id = link_conf->link_id; 241 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 242 struct iwl_link_config_cmd cmd = {}; 243 int ret; 244 245 if (WARN_ON(!link_info || 246 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 247 return -EINVAL; 248 249 RCU_INIT_POINTER(mvm->link_id_to_link_conf[link_info->fw_link_id], 250 NULL); 251 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 252 iwl_mvm_release_fw_link_id(mvm, link_info->fw_link_id); 253 link_info->fw_link_id = IWL_MVM_FW_LINK_ID_INVALID; 254 cmd.spec_link_id = link_conf->link_id; 255 256 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_REMOVE); 257 258 if (!ret) 259 if (iwl_mvm_sf_update(mvm, vif, true)) 260 IWL_ERR(mvm, "Failed to update SF state\n"); 261 262 return ret; 263 } 264 265 /* link should be deactivated before removal, so in most cases we need to 266 * perform these two operations together 267 */ 268 int iwl_mvm_disable_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 269 struct ieee80211_bss_conf *link_conf) 270 { 271 int ret; 272 273 ret = iwl_mvm_link_changed(mvm, vif, link_conf, 274 LINK_CONTEXT_MODIFY_ACTIVE, false); 275 if (ret) 276 return ret; 277 278 ret = iwl_mvm_remove_link(mvm, vif, link_conf); 279 if (ret) 280 return ret; 281 282 return ret; 283 } 284