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 struct iwl_mvm_phy_ctxt *phyctxt; 57 58 if (WARN_ON_ONCE(!link_info)) 59 return -EINVAL; 60 61 if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) { 62 link_info->fw_link_id = iwl_mvm_get_free_fw_link_id(mvm, 63 mvmvif); 64 if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) 65 return -EINVAL; 66 67 rcu_assign_pointer(mvm->link_id_to_link_conf[link_info->fw_link_id], 68 link_conf); 69 } 70 71 /* Update SF - Disable if needed. if this fails, SF might still be on 72 * while many macs are bound, which is forbidden - so fail the binding. 73 */ 74 if (iwl_mvm_sf_update(mvm, vif, false)) 75 return -EINVAL; 76 77 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 78 cmd.mac_id = cpu_to_le32(mvmvif->id); 79 cmd.spec_link_id = link_conf->link_id; 80 /* P2P-Device already has a valid PHY context during add */ 81 phyctxt = link_info->phy_ctxt; 82 if (phyctxt) 83 cmd.phy_id = cpu_to_le32(phyctxt->id); 84 else 85 cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID); 86 87 memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN); 88 89 if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid) 90 memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN); 91 92 cmd.listen_lmac = cpu_to_le32(link_info->listen_lmac); 93 94 return iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_ADD); 95 } 96 97 int iwl_mvm_link_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 98 struct ieee80211_bss_conf *link_conf, 99 u32 changes, bool active) 100 { 101 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 102 unsigned int link_id = link_conf->link_id; 103 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 104 struct iwl_mvm_phy_ctxt *phyctxt; 105 struct iwl_link_config_cmd cmd = {}; 106 u32 ht_flag, flags = 0, flags_mask = 0; 107 int ret; 108 109 if (WARN_ON_ONCE(!link_info || 110 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 111 return -EINVAL; 112 113 if (changes & LINK_CONTEXT_MODIFY_ACTIVE) { 114 /* When activating a link, phy context should be valid; 115 * when deactivating a link, it also should be valid since 116 * the link was active before. So, do nothing in this case. 117 * Since a link is added first with FW_CTXT_INVALID, then we 118 * can get here in case it's removed before it was activated. 119 */ 120 if (!link_info->phy_ctxt) 121 return 0; 122 123 /* Catch early if driver tries to activate or deactivate a link 124 * twice. 125 */ 126 WARN_ON_ONCE(active == link_info->active); 127 128 /* When deactivating a link session protection should 129 * be stopped 130 */ 131 if (!active && vif->type == NL80211_IFTYPE_STATION) 132 iwl_mvm_stop_session_protection(mvm, vif); 133 } 134 135 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 136 137 /* The phy_id, link address and listen_lmac can be modified only until 138 * the link becomes active, otherwise they will be ignored. 139 */ 140 phyctxt = link_info->phy_ctxt; 141 if (phyctxt) 142 cmd.phy_id = cpu_to_le32(phyctxt->id); 143 else 144 cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID); 145 cmd.mac_id = cpu_to_le32(mvmvif->id); 146 147 memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN); 148 149 cmd.active = cpu_to_le32(active); 150 151 if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid) 152 memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN); 153 154 iwl_mvm_set_fw_basic_rates(mvm, vif, link_conf, 155 &cmd.cck_rates, &cmd.ofdm_rates); 156 157 cmd.cck_short_preamble = cpu_to_le32(link_conf->use_short_preamble); 158 cmd.short_slot = cpu_to_le32(link_conf->use_short_slot); 159 160 /* The fw does not distinguish between ht and fat */ 161 ht_flag = LINK_PROT_FLG_HT_PROT | LINK_PROT_FLG_FAT_PROT; 162 iwl_mvm_set_fw_protection_flags(mvm, vif, link_conf, 163 &cmd.protection_flags, 164 ht_flag, LINK_PROT_FLG_TGG_PROTECT); 165 166 iwl_mvm_set_fw_qos_params(mvm, vif, link_conf, cmd.ac, 167 &cmd.qos_flags); 168 169 170 cmd.bi = cpu_to_le32(link_conf->beacon_int); 171 cmd.dtim_interval = cpu_to_le32(link_conf->beacon_int * 172 link_conf->dtim_period); 173 174 if (!link_conf->he_support || iwlwifi_mod_params.disable_11ax || 175 (vif->type == NL80211_IFTYPE_STATION && !vif->cfg.assoc)) { 176 changes &= ~LINK_CONTEXT_MODIFY_HE_PARAMS; 177 goto send_cmd; 178 } 179 180 cmd.htc_trig_based_pkt_ext = link_conf->htc_trig_based_pkt_ext; 181 182 if (link_conf->uora_exists) { 183 cmd.rand_alloc_ecwmin = 184 link_conf->uora_ocw_range & 0x7; 185 cmd.rand_alloc_ecwmax = 186 (link_conf->uora_ocw_range >> 3) & 0x7; 187 } 188 189 /* TODO how to set ndp_fdbk_buff_th_exp? */ 190 191 if (iwl_mvm_set_fw_mu_edca_params(mvm, mvmvif->link[link_id], 192 &cmd.trig_based_txf[0])) { 193 flags |= LINK_FLG_MU_EDCA_CW; 194 flags_mask |= LINK_FLG_MU_EDCA_CW; 195 } 196 197 if (link_conf->eht_puncturing && !iwlwifi_mod_params.disable_11be) 198 cmd.puncture_mask = cpu_to_le16(link_conf->eht_puncturing); 199 else 200 /* This flag can be set only if the MAC has eht support */ 201 changes &= ~LINK_CONTEXT_MODIFY_EHT_PARAMS; 202 203 cmd.bss_color = link_conf->he_bss_color.color; 204 205 if (!link_conf->he_bss_color.enabled) { 206 flags |= LINK_FLG_BSS_COLOR_DIS; 207 flags_mask |= LINK_FLG_BSS_COLOR_DIS; 208 } 209 210 cmd.frame_time_rts_th = cpu_to_le16(link_conf->frame_time_rts_th); 211 212 /* Block 26-tone RU OFDMA transmissions */ 213 if (link_info->he_ru_2mhz_block) { 214 flags |= LINK_FLG_RU_2MHZ_BLOCK; 215 flags_mask |= LINK_FLG_RU_2MHZ_BLOCK; 216 } 217 218 if (link_conf->nontransmitted) { 219 ether_addr_copy(cmd.ref_bssid_addr, 220 link_conf->transmitter_bssid); 221 cmd.bssid_index = link_conf->bssid_index; 222 } 223 224 send_cmd: 225 cmd.modify_mask = cpu_to_le32(changes); 226 cmd.flags = cpu_to_le32(flags); 227 cmd.flags_mask = cpu_to_le32(flags_mask); 228 cmd.spec_link_id = link_conf->link_id; 229 cmd.listen_lmac = cpu_to_le32(link_info->listen_lmac); 230 231 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_MODIFY); 232 if (!ret && (changes & LINK_CONTEXT_MODIFY_ACTIVE)) 233 link_info->active = active; 234 235 return ret; 236 } 237 238 int iwl_mvm_remove_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 239 struct ieee80211_bss_conf *link_conf) 240 { 241 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 242 unsigned int link_id = link_conf->link_id; 243 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 244 struct iwl_link_config_cmd cmd = {}; 245 int ret; 246 247 if (WARN_ON(!link_info || 248 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 249 return -EINVAL; 250 251 RCU_INIT_POINTER(mvm->link_id_to_link_conf[link_info->fw_link_id], 252 NULL); 253 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 254 iwl_mvm_release_fw_link_id(mvm, link_info->fw_link_id); 255 link_info->fw_link_id = IWL_MVM_FW_LINK_ID_INVALID; 256 cmd.spec_link_id = link_conf->link_id; 257 258 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_REMOVE); 259 260 if (!ret) 261 if (iwl_mvm_sf_update(mvm, vif, true)) 262 IWL_ERR(mvm, "Failed to update SF state\n"); 263 264 return ret; 265 } 266 267 /* link should be deactivated before removal, so in most cases we need to 268 * perform these two operations together 269 */ 270 int iwl_mvm_disable_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 271 struct ieee80211_bss_conf *link_conf) 272 { 273 int ret; 274 275 ret = iwl_mvm_link_changed(mvm, vif, link_conf, 276 LINK_CONTEXT_MODIFY_ACTIVE, false); 277 if (ret) 278 return ret; 279 280 ret = iwl_mvm_remove_link(mvm, vif, link_conf); 281 if (ret) 282 return ret; 283 284 return ret; 285 } 286