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 return iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_ADD); 93 } 94 95 int iwl_mvm_link_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 96 struct ieee80211_bss_conf *link_conf, 97 u32 changes, bool active) 98 { 99 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 100 unsigned int link_id = link_conf->link_id; 101 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 102 struct iwl_mvm_phy_ctxt *phyctxt; 103 struct iwl_link_config_cmd cmd = {}; 104 u32 ht_flag, flags = 0, flags_mask = 0; 105 int ret; 106 107 if (WARN_ON_ONCE(!link_info || 108 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 109 return -EINVAL; 110 111 if (changes & LINK_CONTEXT_MODIFY_ACTIVE) { 112 /* When activating a link, phy context should be valid; 113 * when deactivating a link, it also should be valid since 114 * the link was active before. So, do nothing in this case. 115 * Since a link is added first with FW_CTXT_INVALID, then we 116 * can get here in case it's removed before it was activated. 117 */ 118 if (!link_info->phy_ctxt) 119 return 0; 120 121 /* check there aren't too many active links */ 122 if (!link_info->active && active) { 123 int i, count = 0; 124 125 /* link with phy_ctxt is active in FW */ 126 for_each_mvm_vif_valid_link(mvmvif, i) 127 if (mvmvif->link[i]->phy_ctxt) 128 count++; 129 130 if (vif->type == NL80211_IFTYPE_AP) { 131 if (count > mvm->fw->ucode_capa.num_beacons) 132 return -EOPNOTSUPP; 133 /* this should be per HW or such */ 134 } else if (count >= IWL_MVM_FW_MAX_ACTIVE_LINKS_NUM) { 135 return -EOPNOTSUPP; 136 } 137 } 138 139 /* Catch early if driver tries to activate or deactivate a link 140 * twice. 141 */ 142 WARN_ON_ONCE(active == link_info->active); 143 144 /* When deactivating a link session protection should 145 * be stopped 146 */ 147 if (!active && vif->type == NL80211_IFTYPE_STATION) 148 iwl_mvm_stop_session_protection(mvm, vif); 149 } 150 151 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 152 153 /* The phy_id, link address and listen_lmac can be modified only until 154 * the link becomes active, otherwise they will be ignored. 155 */ 156 phyctxt = link_info->phy_ctxt; 157 if (phyctxt) 158 cmd.phy_id = cpu_to_le32(phyctxt->id); 159 else 160 cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID); 161 cmd.mac_id = cpu_to_le32(mvmvif->id); 162 163 memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN); 164 165 cmd.active = cpu_to_le32(active); 166 167 if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid) 168 memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN); 169 170 /* TODO: set a value to cmd.listen_lmac when system requiremens 171 * will define it 172 */ 173 174 iwl_mvm_set_fw_basic_rates(mvm, vif, link_conf, 175 &cmd.cck_rates, &cmd.ofdm_rates); 176 177 cmd.cck_short_preamble = cpu_to_le32(link_conf->use_short_preamble); 178 cmd.short_slot = cpu_to_le32(link_conf->use_short_slot); 179 180 /* The fw does not distinguish between ht and fat */ 181 ht_flag = LINK_PROT_FLG_HT_PROT | LINK_PROT_FLG_FAT_PROT; 182 iwl_mvm_set_fw_protection_flags(mvm, vif, link_conf, 183 &cmd.protection_flags, 184 ht_flag, LINK_PROT_FLG_TGG_PROTECT); 185 186 iwl_mvm_set_fw_qos_params(mvm, vif, link_conf, &cmd.ac[0], 187 &cmd.qos_flags); 188 189 190 cmd.bi = cpu_to_le32(link_conf->beacon_int); 191 cmd.dtim_interval = cpu_to_le32(link_conf->beacon_int * 192 link_conf->dtim_period); 193 194 if (!link_conf->he_support || iwlwifi_mod_params.disable_11ax || 195 (vif->type == NL80211_IFTYPE_STATION && !vif->cfg.assoc)) { 196 changes &= ~LINK_CONTEXT_MODIFY_HE_PARAMS; 197 goto send_cmd; 198 } 199 200 cmd.htc_trig_based_pkt_ext = link_conf->htc_trig_based_pkt_ext; 201 202 if (link_conf->uora_exists) { 203 cmd.rand_alloc_ecwmin = 204 link_conf->uora_ocw_range & 0x7; 205 cmd.rand_alloc_ecwmax = 206 (link_conf->uora_ocw_range >> 3) & 0x7; 207 } 208 209 /* TODO how to set ndp_fdbk_buff_th_exp? */ 210 211 if (iwl_mvm_set_fw_mu_edca_params(mvm, mvmvif, 212 &cmd.trig_based_txf[0])) { 213 flags |= LINK_FLG_MU_EDCA_CW; 214 flags_mask |= LINK_FLG_MU_EDCA_CW; 215 } 216 217 if (link_conf->eht_puncturing && !iwlwifi_mod_params.disable_11be) 218 cmd.puncture_mask = cpu_to_le16(link_conf->eht_puncturing); 219 else 220 /* This flag can be set only if the MAC has eht support */ 221 changes &= ~LINK_CONTEXT_MODIFY_EHT_PARAMS; 222 223 cmd.bss_color = link_conf->he_bss_color.color; 224 225 if (!link_conf->he_bss_color.enabled) { 226 flags |= LINK_FLG_BSS_COLOR_DIS; 227 flags_mask |= LINK_FLG_BSS_COLOR_DIS; 228 } 229 230 cmd.frame_time_rts_th = cpu_to_le16(link_conf->frame_time_rts_th); 231 232 /* Block 26-tone RU OFDMA transmissions */ 233 if (link_info->he_ru_2mhz_block) { 234 flags |= LINK_FLG_RU_2MHZ_BLOCK; 235 flags_mask |= LINK_FLG_RU_2MHZ_BLOCK; 236 } 237 238 if (link_conf->nontransmitted) { 239 ether_addr_copy(cmd.ref_bssid_addr, 240 link_conf->transmitter_bssid); 241 cmd.bssid_index = link_conf->bssid_index; 242 } 243 244 send_cmd: 245 cmd.modify_mask = cpu_to_le32(changes); 246 cmd.flags = cpu_to_le32(flags); 247 cmd.flags_mask = cpu_to_le32(flags_mask); 248 249 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_MODIFY); 250 if (!ret && (changes & LINK_CONTEXT_MODIFY_ACTIVE)) 251 link_info->active = active; 252 253 return ret; 254 } 255 256 int iwl_mvm_remove_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 257 struct ieee80211_bss_conf *link_conf) 258 { 259 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 260 unsigned int link_id = link_conf->link_id; 261 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id]; 262 struct iwl_link_config_cmd cmd = {}; 263 int ret; 264 265 if (WARN_ON(!link_info || 266 link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)) 267 return -EINVAL; 268 269 RCU_INIT_POINTER(mvm->link_id_to_link_conf[link_info->fw_link_id], 270 NULL); 271 cmd.link_id = cpu_to_le32(link_info->fw_link_id); 272 iwl_mvm_release_fw_link_id(mvm, link_info->fw_link_id); 273 link_info->fw_link_id = IWL_MVM_FW_LINK_ID_INVALID; 274 275 ret = iwl_mvm_link_cmd_send(mvm, &cmd, FW_CTXT_ACTION_REMOVE); 276 277 if (!ret) 278 if (iwl_mvm_sf_update(mvm, vif, true)) 279 IWL_ERR(mvm, "Failed to update SF state\n"); 280 281 return ret; 282 } 283 284 /* link should be deactivated before removal, so in most cases we need to 285 * perform these two operations together 286 */ 287 int iwl_mvm_disable_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 288 struct ieee80211_bss_conf *link_conf) 289 { 290 int ret; 291 292 ret = iwl_mvm_link_changed(mvm, vif, link_conf, 293 LINK_CONTEXT_MODIFY_ACTIVE, false); 294 if (ret) 295 return ret; 296 297 ret = iwl_mvm_remove_link(mvm, vif, link_conf); 298 if (ret) 299 return ret; 300 301 return ret; 302 } 303