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16 Feb 2025 01:43:47 -0800 From: Miri Korenblit To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org Subject: [PATCH 10/42] wifi: iwlwifi: mld: add file iface.h/c Date: Sun, 16 Feb 2025 11:42:49 +0200 Message-Id: <20250216111648.2d9de839e5b1.Ibb83c6a99c67eaa21e74ffa0e83596468c2a65ca@changeid> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250216094321.537988-1-miriam.rachel.korenblit@intel.com> References: <20250216094321.537988-1-miriam.rachel.korenblit@intel.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Organization: Intel Israel (74) Limited this file is handling the driver-level vif object Signed-off-by: Miri Korenblit --- .../net/wireless/intel/iwlwifi/mld/iface.c | 671 ++++++++++++++++++ .../net/wireless/intel/iwlwifi/mld/iface.h | 234 ++++++ 2 files changed, 905 insertions(+) create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/iface.c create mode 100644 drivers/net/wireless/intel/iwlwifi/mld/iface.h diff --git a/drivers/net/wireless/intel/iwlwifi/mld/iface.c b/drivers/net/wireless/intel/iwlwifi/mld/iface.c new file mode 100644 index 000000000000..0d1803ab665e --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mld/iface.c @@ -0,0 +1,671 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (C) 2024-2025 Intel Corporation + */ +#include + +#include "iface.h" +#include "hcmd.h" +#include "key.h" +#include "mlo.h" +#include "mac80211.h" + +#include "fw/api/context.h" +#include "fw/api/mac.h" +#include "fw/api/time-event.h" +#include "fw/api/datapath.h" + +/* Cleanup function for struct iwl_mld_vif, will be called in restart */ +void iwl_mld_cleanup_vif(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + struct iwl_mld *mld = mld_vif->mld; + struct iwl_mld_link *link; + + /* EMLSR is turned back on during recovery */ + vif->driver_flags &= ~IEEE80211_VIF_EML_ACTIVE; + + mld_vif->roc_activity = ROC_NUM_ACTIVITIES; + + for_each_mld_vif_valid_link(mld_vif, link) { + iwl_mld_cleanup_link(mld_vif->mld, link); + + /* Correctly allocated primary link in non-MLO mode */ + if (!ieee80211_vif_is_mld(vif) && + link_id == 0 && link == &mld_vif->deflink) + continue; + + if (vif->active_links & BIT(link_id)) + continue; + + /* Should not happen as link removal should always succeed */ + WARN_ON(1); + if (link != &mld_vif->deflink) + kfree_rcu(link, rcu_head); + RCU_INIT_POINTER(mld_vif->link[link_id], NULL); + } + + ieee80211_iter_keys(mld->hw, vif, iwl_mld_cleanup_keys_iter, NULL); + + CLEANUP_STRUCT(mld_vif); +} + +static int iwl_mld_send_mac_cmd(struct iwl_mld *mld, + struct iwl_mac_config_cmd *cmd) +{ + int ret; + + lockdep_assert_wiphy(mld->wiphy); + + ret = iwl_mld_send_cmd_pdu(mld, + WIDE_ID(MAC_CONF_GROUP, MAC_CONFIG_CMD), + cmd); + if (ret) + IWL_ERR(mld, "Failed to send MAC_CONFIG_CMD ret = %d\n", ret); + + return ret; +} + +int iwl_mld_mac80211_iftype_to_fw(const struct ieee80211_vif *vif) +{ + switch (vif->type) { + case NL80211_IFTYPE_STATION: + return vif->p2p ? FW_MAC_TYPE_P2P_STA : FW_MAC_TYPE_BSS_STA; + case NL80211_IFTYPE_AP: + return FW_MAC_TYPE_GO; + case NL80211_IFTYPE_MONITOR: + return FW_MAC_TYPE_LISTENER; + case NL80211_IFTYPE_P2P_DEVICE: + return FW_MAC_TYPE_P2P_DEVICE; + case NL80211_IFTYPE_ADHOC: + return FW_MAC_TYPE_IBSS; + default: + WARN_ON_ONCE(1); + } + return FW_MAC_TYPE_BSS_STA; +} + +static bool iwl_mld_is_nic_ack_enabled(struct iwl_mld *mld, + struct ieee80211_vif *vif) +{ + const struct ieee80211_supported_band *sband; + const struct ieee80211_sta_he_cap *own_he_cap; + + lockdep_assert_wiphy(mld->wiphy); + + /* This capability is the same for all bands, + * so take it from one of them. + */ + sband = mld->hw->wiphy->bands[NL80211_BAND_2GHZ]; + own_he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); + + return own_he_cap && (own_he_cap->he_cap_elem.mac_cap_info[2] & + IEEE80211_HE_MAC_CAP2_ACK_EN); +} + +/* fill the common part for all interface types */ +static void iwl_mld_mac_cmd_fill_common(struct iwl_mld *mld, + struct ieee80211_vif *vif, + struct iwl_mac_config_cmd *cmd, + u32 action) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + struct ieee80211_bss_conf *link_conf; + unsigned int link_id; + + lockdep_assert_wiphy(mld->wiphy); + + cmd->id_and_color = cpu_to_le32(mld_vif->fw_id); + cmd->action = cpu_to_le32(action); + + cmd->mac_type = + cpu_to_le32(iwl_mld_mac80211_iftype_to_fw(vif)); + + memcpy(cmd->local_mld_addr, vif->addr, ETH_ALEN); + + if (iwlwifi_mod_params.disable_11ax) + return; + + cmd->nic_not_ack_enabled = + cpu_to_le32(!iwl_mld_is_nic_ack_enabled(mld, vif)); + + /* If we have MLO enabled, then the firmware needs to enable + * address translation for the station(s) we add. That depends + * on having EHT enabled in firmware, which in turn depends on + * mac80211 in the code below. + * However, mac80211 doesn't enable HE/EHT until it has parsed + * the association response successfully, so just skip all that + * and enable both when we have MLO. + */ + if (ieee80211_vif_is_mld(vif)) { + if (vif->type == NL80211_IFTYPE_AP) + cmd->he_ap_support = cpu_to_le16(1); + else + cmd->he_support = cpu_to_le16(1); + + cmd->eht_support = cpu_to_le32(1); + return; + } + + for_each_vif_active_link(vif, link_conf, link_id) { + if (!link_conf->he_support) + continue; + + if (vif->type == NL80211_IFTYPE_AP) + cmd->he_ap_support = cpu_to_le16(1); + else + cmd->he_support = cpu_to_le16(1); + + /* EHT, if supported, was already set above */ + break; + } +} + +static void iwl_mld_fill_mac_cmd_sta(struct iwl_mld *mld, + struct ieee80211_vif *vif, u32 action, + struct iwl_mac_config_cmd *cmd) +{ + struct ieee80211_bss_conf *link; + u32 twt_policy = 0; + int link_id; + + lockdep_assert_wiphy(mld->wiphy); + + WARN_ON(vif->type != NL80211_IFTYPE_STATION); + + /* We always want to hear MCAST frames, if we're not authorized yet, + * we'll drop them. + */ + cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_GRP); + + /* Adding a MAC ctxt with is_assoc set is not allowed in fw + * (and shouldn't happen) + */ + if (vif->cfg.assoc && action != FW_CTXT_ACTION_ADD) { + cmd->client.is_assoc = 1; + + if (!iwl_mld_vif_from_mac80211(vif)->authorized) + cmd->client.data_policy |= + cpu_to_le16(COEX_HIGH_PRIORITY_ENABLE); + } else { + /* Allow beacons to pass through as long as we are not + * associated + */ + cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON); + } + + cmd->client.assoc_id = cpu_to_le16(vif->cfg.aid); + + if (ieee80211_vif_is_mld(vif)) { + u16 esr_transition_timeout = + u16_get_bits(vif->cfg.eml_cap, + IEEE80211_EML_CAP_TRANSITION_TIMEOUT); + + cmd->client.esr_transition_timeout = + min_t(u16, IEEE80211_EML_CAP_TRANSITION_TIMEOUT_128TU, + esr_transition_timeout); + cmd->client.medium_sync_delay = + cpu_to_le16(vif->cfg.eml_med_sync_delay); + } + + for_each_vif_active_link(vif, link, link_id) { + if (!link->he_support) + continue; + + if (link->twt_requester) + twt_policy |= TWT_SUPPORTED; + if (link->twt_protected) + twt_policy |= PROTECTED_TWT_SUPPORTED; + if (link->twt_broadcast) + twt_policy |= BROADCAST_TWT_SUPPORTED; + } + + if (!iwlwifi_mod_params.disable_11ax) + cmd->client.data_policy |= cpu_to_le16(twt_policy); + + if (vif->probe_req_reg && vif->cfg.assoc && vif->p2p) + cmd->filter_flags |= + cpu_to_le32(MAC_CFG_FILTER_ACCEPT_PROBE_REQ); + + if (vif->p2p) + cmd->client.ctwin = + cpu_to_le32(vif->bss_conf.p2p_noa_attr.oppps_ctwindow & + IEEE80211_P2P_OPPPS_CTWINDOW_MASK); +} + +static void iwl_mld_fill_mac_cmd_ap(struct iwl_mld *mld, + struct ieee80211_vif *vif, + struct iwl_mac_config_cmd *cmd) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + + lockdep_assert_wiphy(mld->wiphy); + + WARN_ON(vif->type != NL80211_IFTYPE_AP); + + cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_PROBE_REQ); + + /* in AP mode, pass beacons from other APs (needed for ht protection). + * When there're no any associated station, which means that we are not + * TXing anyway, don't ask FW to pass beacons to prevent unnecessary + * wake-ups. + */ + if (mld_vif->num_associated_stas) + cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON); +} + +static void iwl_mld_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) +{ + bool *go_active = _data; + + if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO && + iwl_mld_vif_from_mac80211(vif)->ap_ibss_active) + *go_active = true; +} + +static bool iwl_mld_p2p_dev_has_extended_disc(struct iwl_mld *mld) +{ + bool go_active = false; + + /* This flag should be set to true when the P2P Device is + * discoverable and there is at least a P2P GO. Setting + * this flag will allow the P2P Device to be discoverable on other + * channels in addition to its listen channel. + * Note that this flag should not be set in other cases as it opens the + * Rx filters on all MAC and increases the number of interrupts. + */ + ieee80211_iterate_active_interfaces(mld->hw, + IEEE80211_IFACE_ITER_RESUME_ALL, + iwl_mld_go_iterator, &go_active); + + return go_active; +} + +static void iwl_mld_fill_mac_cmd_p2p_dev(struct iwl_mld *mld, + struct ieee80211_vif *vif, + struct iwl_mac_config_cmd *cmd) +{ + bool ext_disc = iwl_mld_p2p_dev_has_extended_disc(mld); + + lockdep_assert_wiphy(mld->wiphy); + + /* Override the filter flags to accept all management frames. This is + * needed to support both P2P device discovery using probe requests and + * P2P service discovery using action frames + */ + cmd->filter_flags = cpu_to_le32(MAC_CFG_FILTER_ACCEPT_CONTROL_AND_MGMT); + + if (ext_disc) + cmd->p2p_dev.is_disc_extended = cpu_to_le32(1); +} + +static void iwl_mld_fill_mac_cmd_ibss(struct iwl_mld *mld, + struct ieee80211_vif *vif, + struct iwl_mac_config_cmd *cmd) +{ + lockdep_assert_wiphy(mld->wiphy); + + WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); + + cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON | + MAC_CFG_FILTER_ACCEPT_PROBE_REQ | + MAC_CFG_FILTER_ACCEPT_GRP); +} + +static int +iwl_mld_rm_mac_from_fw(struct iwl_mld *mld, struct ieee80211_vif *vif) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + struct iwl_mac_config_cmd cmd = { + .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), + .id_and_color = cpu_to_le32(mld_vif->fw_id), + }; + + return iwl_mld_send_mac_cmd(mld, &cmd); +} + +int iwl_mld_mac_fw_action(struct iwl_mld *mld, struct ieee80211_vif *vif, + u32 action) +{ + struct iwl_mac_config_cmd cmd = {}; + + lockdep_assert_wiphy(mld->wiphy); + + if (action == FW_CTXT_ACTION_REMOVE) + return iwl_mld_rm_mac_from_fw(mld, vif); + + iwl_mld_mac_cmd_fill_common(mld, vif, &cmd, action); + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + iwl_mld_fill_mac_cmd_sta(mld, vif, action, &cmd); + break; + case NL80211_IFTYPE_AP: + iwl_mld_fill_mac_cmd_ap(mld, vif, &cmd); + break; + case NL80211_IFTYPE_MONITOR: + cmd.filter_flags = + cpu_to_le32(MAC_CFG_FILTER_PROMISC | + MAC_CFG_FILTER_ACCEPT_CONTROL_AND_MGMT | + MAC_CFG_FILTER_ACCEPT_BEACON | + MAC_CFG_FILTER_ACCEPT_PROBE_REQ | + MAC_CFG_FILTER_ACCEPT_GRP); + break; + case NL80211_IFTYPE_P2P_DEVICE: + iwl_mld_fill_mac_cmd_p2p_dev(mld, vif, &cmd); + break; + case NL80211_IFTYPE_ADHOC: + iwl_mld_fill_mac_cmd_ibss(mld, vif, &cmd); + break; + default: + WARN(1, "not supported yet\n"); + return -EOPNOTSUPP; + } + + return iwl_mld_send_mac_cmd(mld, &cmd); +} + +IWL_MLD_ALLOC_FN(vif, vif) + +/* Constructor function for struct iwl_mld_vif */ +static int +iwl_mld_init_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + int ret; + + lockdep_assert_wiphy(mld->wiphy); + + mld_vif->mld = mld; + mld_vif->roc_activity = ROC_NUM_ACTIVITIES; + + ret = iwl_mld_allocate_vif_fw_id(mld, &mld_vif->fw_id, vif); + if (ret) + return ret; + + if (!mld->fw_status.in_hw_restart) { + wiphy_work_init(&mld_vif->emlsr.unblock_tpt_wk, + iwl_mld_emlsr_unblock_tpt_wk); + wiphy_delayed_work_init(&mld_vif->emlsr.check_tpt_wk, + iwl_mld_emlsr_check_tpt); + wiphy_delayed_work_init(&mld_vif->emlsr.prevent_done_wk, + iwl_mld_emlsr_prevent_done_wk); + wiphy_delayed_work_init(&mld_vif->emlsr.tmp_non_bss_done_wk, + iwl_mld_emlsr_tmp_non_bss_done_wk); + } + + return 0; +} + +int iwl_mld_add_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + int ret; + + lockdep_assert_wiphy(mld->wiphy); + + ret = iwl_mld_init_vif(mld, vif); + if (ret) + return ret; + + ret = iwl_mld_mac_fw_action(mld, vif, FW_CTXT_ACTION_ADD); + if (ret) + RCU_INIT_POINTER(mld->fw_id_to_vif[mld_vif->fw_id], NULL); + + return ret; +} + +int iwl_mld_rm_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + int ret; + + lockdep_assert_wiphy(mld->wiphy); + + ret = iwl_mld_mac_fw_action(mld, vif, FW_CTXT_ACTION_REMOVE); + + if (WARN_ON(mld_vif->fw_id >= ARRAY_SIZE(mld->fw_id_to_vif))) + return -EINVAL; + + RCU_INIT_POINTER(mld->fw_id_to_vif[mld_vif->fw_id], NULL); + + iwl_mld_cancel_notifications_of_object(mld, IWL_MLD_OBJECT_TYPE_VIF, + mld_vif->fw_id); + + return ret; +} + +void iwl_mld_set_vif_associated(struct iwl_mld *mld, + struct ieee80211_vif *vif) +{ + struct ieee80211_bss_conf *link; + unsigned int link_id; + + for_each_vif_active_link(vif, link, link_id) { + if (iwl_mld_link_set_associated(mld, vif, link)) + IWL_ERR(mld, "failed to update link %d\n", link_id); + } + + iwl_mld_recalc_multicast_filter(mld); +} + +static void iwl_mld_get_fw_id_bss_bitmap_iter(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + u8 *fw_id_bitmap = _data; + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + + if (ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_STATION) + return; + + *fw_id_bitmap |= BIT(mld_vif->fw_id); +} + +u8 iwl_mld_get_fw_bss_vifs_ids(struct iwl_mld *mld) +{ + u8 fw_id_bitmap = 0; + + ieee80211_iterate_interfaces(mld->hw, + IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER, + iwl_mld_get_fw_id_bss_bitmap_iter, + &fw_id_bitmap); + + return fw_id_bitmap; +} + +void iwl_mld_handle_probe_resp_data_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt) +{ + const struct iwl_probe_resp_data_notif *notif = (void *)pkt->data; + struct iwl_probe_resp_data *old_data, *new_data; + struct ieee80211_vif *vif; + struct iwl_mld_link *mld_link; + + IWL_DEBUG_INFO(mld, "Probe response data notif: noa %d, csa %d\n", + notif->noa_active, notif->csa_counter); + + if (IWL_FW_CHECK(mld, le32_to_cpu(notif->mac_id) >= + ARRAY_SIZE(mld->fw_id_to_vif), + "mac id is invalid: %d\n", + le32_to_cpu(notif->mac_id))) + return; + + vif = wiphy_dereference(mld->wiphy, + mld->fw_id_to_vif[le32_to_cpu(notif->mac_id)]); + + /* the firmware gives us the mac_id (and not the link_id), mac80211 + * gets a vif and not a link, bottom line, this flow is not MLD ready + * yet. + */ + if (WARN_ON(!vif) || ieee80211_vif_is_mld(vif)) + return; + + if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA && + notif->csa_counter >= 1) + ieee80211_beacon_set_cntdwn(vif, notif->csa_counter); + + if (!vif->p2p) + return; + + mld_link = &iwl_mld_vif_from_mac80211(vif)->deflink; + + new_data = kzalloc(sizeof(*new_data), GFP_KERNEL); + if (!new_data) + return; + + memcpy(&new_data->notif, notif, sizeof(new_data->notif)); + + /* noa_attr contains 1 reserved byte, need to substruct it */ + new_data->noa_len = sizeof(struct ieee80211_vendor_ie) + + sizeof(new_data->notif.noa_attr) - 1; + + /* + * If it's a one time NoA, only one descriptor is needed, + * adjust the length according to len_low. + */ + if (new_data->notif.noa_attr.len_low == + sizeof(struct ieee80211_p2p_noa_desc) + 2) + new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc); + + old_data = wiphy_dereference(mld->wiphy, mld_link->probe_resp_data); + rcu_assign_pointer(mld_link->probe_resp_data, new_data); + + if (old_data) + kfree_rcu(old_data, rcu_head); +} + +void iwl_mld_handle_uapsd_misbehaving_ap_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt) +{ + struct iwl_uapsd_misbehaving_ap_notif *notif = (void *)pkt->data; + struct ieee80211_vif *vif; + + if (IWL_FW_CHECK(mld, notif->mac_id >= ARRAY_SIZE(mld->fw_id_to_vif), + "mac id is invalid: %d\n", notif->mac_id)) + return; + + vif = wiphy_dereference(mld->wiphy, mld->fw_id_to_vif[notif->mac_id]); + + if (WARN_ON(!vif) || ieee80211_vif_is_mld(vif)) + return; + + IWL_WARN(mld, "uapsd misbehaving AP: %pM\n", vif->bss_conf.bssid); +} + +void iwl_mld_handle_datapath_monitor_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt) +{ + struct iwl_datapath_monitor_notif *notif = (void *)pkt->data; + struct ieee80211_bss_conf *link; + struct ieee80211_supported_band *sband; + const struct ieee80211_sta_he_cap *he_cap; + struct ieee80211_vif *vif; + struct iwl_mld_vif *mld_vif; + + if (notif->type != cpu_to_le32(IWL_DP_MON_NOTIF_TYPE_EXT_CCA)) + return; + + link = iwl_mld_fw_id_to_link_conf(mld, notif->link_id); + if (WARN_ON(!link)) + return; + + vif = link->vif; + if (WARN_ON(!vif) || vif->type != NL80211_IFTYPE_STATION || + !vif->cfg.assoc) + return; + + if (!link->chanreq.oper.chan || + link->chanreq.oper.chan->band != NL80211_BAND_2GHZ || + link->chanreq.oper.width < NL80211_CHAN_WIDTH_40) + return; + + mld_vif = iwl_mld_vif_from_mac80211(vif); + + /* this shouldn't happen *again*, ignore it */ + if (mld_vif->cca_40mhz_workaround != CCA_40_MHZ_WA_NONE) + return; + + mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_RECONNECT; + + /* + * This capability manipulation isn't really ideal, but it's the + * easiest choice - otherwise we'd have to do some major changes + * in mac80211 to support this, which isn't worth it. This does + * mean that userspace may have outdated information, but that's + * actually not an issue at all. + */ + sband = mld->wiphy->bands[NL80211_BAND_2GHZ]; + + WARN_ON(!sband->ht_cap.ht_supported); + WARN_ON(!(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)); + sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; + + he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); + + if (he_cap) { + /* we know that ours is writable */ + struct ieee80211_sta_he_cap *he = (void *)(uintptr_t)he_cap; + + WARN_ON(!he->has_he); + WARN_ON(!(he->he_cap_elem.phy_cap_info[0] & + IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)); + he->he_cap_elem.phy_cap_info[0] &= + ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; + } + + ieee80211_disconnect(vif, true); +} + +void iwl_mld_reset_cca_40mhz_workaround(struct iwl_mld *mld, + struct ieee80211_vif *vif) +{ + struct ieee80211_supported_band *sband; + const struct ieee80211_sta_he_cap *he_cap; + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); + + if (vif->type != NL80211_IFTYPE_STATION) + return; + + if (mld_vif->cca_40mhz_workaround == CCA_40_MHZ_WA_NONE) + return; + + /* Now we are just reconnecting with the new capabilities, + * but remember to reset the capabilities when we disconnect for real + */ + if (mld_vif->cca_40mhz_workaround == CCA_40_MHZ_WA_RECONNECT) { + mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_RESET; + return; + } + + /* Now cca_40mhz_workaround == CCA_40_MHZ_WA_RESET */ + + sband = mld->wiphy->bands[NL80211_BAND_2GHZ]; + + sband->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; + + he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); + + if (he_cap) { + /* we know that ours is writable */ + struct ieee80211_sta_he_cap *he = (void *)(uintptr_t)he_cap; + + he->he_cap_elem.phy_cap_info[0] |= + IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; + } + + mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_NONE; +} + +struct ieee80211_vif *iwl_mld_get_bss_vif(struct iwl_mld *mld) +{ + unsigned long fw_id_bitmap = iwl_mld_get_fw_bss_vifs_ids(mld); + int fw_id; + + if (hweight8(fw_id_bitmap) != 1) + return NULL; + + fw_id = __ffs(fw_id_bitmap); + + return wiphy_dereference(mld->wiphy, + mld->fw_id_to_vif[fw_id]); +} diff --git a/drivers/net/wireless/intel/iwlwifi/mld/iface.h b/drivers/net/wireless/intel/iwlwifi/mld/iface.h new file mode 100644 index 000000000000..7d0dfbe0ab48 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mld/iface.h @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (C) 2024-2025 Intel Corporation + */ +#ifndef __iwl_mld_iface_h__ +#define __iwl_mld_iface_h__ + +#include + +#include "link.h" +#include "session-protect.h" +#include "d3.h" + +enum iwl_mld_cca_40mhz_wa_status { + CCA_40_MHZ_WA_NONE, + CCA_40_MHZ_WA_RESET, + CCA_40_MHZ_WA_RECONNECT, +}; + +/** + * enum iwl_mld_emlsr_blocked - defines reasons for which EMLSR is blocked + * + * These blocks are applied/stored per-VIF. + * + * @IWL_MLD_EMLSR_BLOCKED_PREVENTION: Prevent repeated EMLSR enter/exit + * @IWL_MLD_EMLSR_BLOCKED_WOWLAN: WOWLAN is preventing EMLSR + * @IWL_MLD_EMLSR_BLOCKED_FW: FW did not recommend MLO + * @IWL_MLD_EMLSR_BLOCKED_ROC: remain-on-channel is preventing EMLSR + * @IWL_MLD_EMLSR_BLOCKED_NON_BSS: An active non-BSS interface's link is + * preventing EMLSR + * @IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS: An expected active non-BSS interface's + * link is preventing EMLSR. This is a temporary blocking that is set when + * there is an indication that a non-BSS interface is to be added. + * @IWL_MLD_EMLSR_BLOCKED_TPT: throughput is too low to make EMLSR worthwhile + */ +enum iwl_mld_emlsr_blocked { + IWL_MLD_EMLSR_BLOCKED_PREVENTION = 0x1, + IWL_MLD_EMLSR_BLOCKED_WOWLAN = 0x2, + IWL_MLD_EMLSR_BLOCKED_FW = 0x4, + IWL_MLD_EMLSR_BLOCKED_ROC = 0x8, + IWL_MLD_EMLSR_BLOCKED_NON_BSS = 0x10, + IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS = 0x20, + IWL_MLD_EMLSR_BLOCKED_TPT = 0x40, +}; + +/** + * enum iwl_mld_emlsr_exit - defines reasons for exiting EMLSR + * + * Reasons to exit EMLSR may be either link specific or even specific to a + * combination of links. + * + * @IWL_MLD_EMLSR_EXIT_BLOCK: Exit due to a block reason being set + * @IWL_MLD_EMLSR_EXIT_MISSED_BEACON: Exit due to missed beacons + * @IWL_MLD_EMLSR_EXIT_FAIL_ENTRY: FW failed to enter EMLSR + * @IWL_MLD_EMLSR_EXIT_CSA: EMLSR prevented due to channel switch on link + * @IWL_MLD_EMLSR_EXIT_EQUAL_BAND: EMLSR prevented as both links share the band + * @IWL_MLD_EMLSR_EXIT_BANDWIDTH: Bandwidths of primary and secondary links are + * not equal + * @IWL_MLD_EMLSR_EXIT_LOW_RSSI: Link RSSI is unsuitable for EMLSR + * @IWL_MLD_EMLSR_EXIT_LINK_USAGE: Exit EMLSR due to low TPT on secondary link + * @IWL_MLD_EMLSR_EXIT_BT_COEX: Exit EMLSR due to BT coexistence + * @IWL_MLD_EMLSR_EXIT_CHAN_LOAD: Exit EMLSR because the primary channel is not + * loaded enough to justify EMLSR. + * @IWL_MLD_EMLSR_EXIT_RFI: Exit EMLSR due to RFI + */ +enum iwl_mld_emlsr_exit { + IWL_MLD_EMLSR_EXIT_BLOCK = 0x1, + IWL_MLD_EMLSR_EXIT_MISSED_BEACON = 0x2, + IWL_MLD_EMLSR_EXIT_FAIL_ENTRY = 0x4, + IWL_MLD_EMLSR_EXIT_CSA = 0x8, + IWL_MLD_EMLSR_EXIT_EQUAL_BAND = 0x10, + IWL_MLD_EMLSR_EXIT_BANDWIDTH = 0x20, + IWL_MLD_EMLSR_EXIT_LOW_RSSI = 0x40, + IWL_MLD_EMLSR_EXIT_LINK_USAGE = 0x80, + IWL_MLD_EMLSR_EXIT_BT_COEX = 0x100, + IWL_MLD_EMLSR_EXIT_CHAN_LOAD = 0x200, + IWL_MLD_EMLSR_EXIT_RFI = 0x400, +}; + +/** + * struct iwl_mld_emlsr - per-VIF data about EMLSR operation + * + * @primary: The current primary link + * @selected_primary: Primary link as selected during the last link selection + * @selected_links: Links as selected during the last link selection + * @blocked_reasons: Reasons preventing EMLSR from being enabled + * @last_exit_reason: Reason for the last EMLSR exit + * @last_exit_ts: Time of the last EMLSR exit (if @last_exit_reason is non-zero) + * @exit_repeat_count: Number of times EMLSR was exited for the same reason + * @unblock_tpt_wk: Unblock EMLSR because the throughput limit was reached + * @check_tpt_wk: a worker to check if IWL_MLD_EMLSR_BLOCKED_TPT should be + * added, for example if there is no longer enough traffic. + * @prevent_done_wk: Worker to remove %IWL_MLD_EMLSR_BLOCKED_PREVENTION + * @tmp_non_bss_done_wk: Worker to remove %IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS + */ +struct iwl_mld_emlsr { + struct_group(zeroed_on_not_authorized, + u8 primary; + + u8 selected_primary; + u16 selected_links; + + enum iwl_mld_emlsr_blocked blocked_reasons; + + enum iwl_mld_emlsr_exit last_exit_reason; + unsigned long last_exit_ts; + u8 exit_repeat_count; + ); + + struct wiphy_work unblock_tpt_wk; + struct wiphy_delayed_work check_tpt_wk; + + struct wiphy_delayed_work prevent_done_wk; + struct wiphy_delayed_work tmp_non_bss_done_wk; +}; + +/** + * struct iwl_mld_vif - virtual interface (MAC context) configuration parameters + * + * @fw_id: fw id of the mac context. + * @session_protect: session protection parameters + * @ap_sta: pointer to AP sta, for easier access to it. + * Relevant only for STA vifs. + * @authorized: indicates the AP station was set to authorized + * @bigtks: BIGTKs of the AP, for beacon protection. + * Only valid for STA. (FIXME: needs to be per link) + * @num_associated_stas: number of associated STAs. Relevant only for AP mode. + * @ap_ibss_active: whether the AP/IBSS was started + * @roc_activity: the id of the roc_activity running. Relevant for p2p device + * only. Set to %ROC_NUM_ACTIVITIES when not in use. + * @cca_40mhz_workaround: When we are connected in 2.4 GHz and 40 MHz, and the + * environment is too loaded, we work around this by reconnecting to the + * same AP with 20 MHz. This manages the status of the workaround. + * @beacon_inject_active: indicates an active debugfs beacon ie injection + * @low_latency_causes: bit flags, indicating the causes for low-latency, + * see @iwl_mld_low_latency_cause. + * @mld: pointer to the mld structure. + * @deflink: default link data, for use in non-MLO, + * @link: reference to link data for each valid link, for use in MLO. + * @emlsr: information related to EMLSR + * @wowlan_data: data used by the wowlan suspend flow + * @use_ps_poll: use ps_poll frames + * @disable_bf: disable beacon filter + * @dbgfs_slink: debugfs symlink for this interface + */ +struct iwl_mld_vif { + /* Add here fields that need clean up on restart */ + struct_group(zeroed_on_hw_restart, + u8 fw_id; + struct iwl_mld_session_protect session_protect; + struct ieee80211_sta *ap_sta; + bool authorized; + struct ieee80211_key_conf __rcu *bigtks[2]; + u8 num_associated_stas; + bool ap_ibss_active; + u32 roc_activity; + enum iwl_mld_cca_40mhz_wa_status cca_40mhz_workaround; +#ifdef CONFIG_IWLWIFI_DEBUGFS + bool beacon_inject_active; +#endif + u8 low_latency_causes; + ); + /* And here fields that survive a fw restart */ + struct iwl_mld *mld; + struct iwl_mld_link deflink; + struct iwl_mld_link __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS]; + + struct iwl_mld_emlsr emlsr; + +#if CONFIG_PM_SLEEP + struct iwl_mld_wowlan_data wowlan_data; +#endif +#ifdef CONFIG_IWLWIFI_DEBUGFS + bool use_ps_poll; + bool disable_bf; + struct dentry *dbgfs_slink; +#endif +}; + +static inline struct iwl_mld_vif * +iwl_mld_vif_from_mac80211(struct ieee80211_vif *vif) +{ + return (void *)vif->drv_priv; +} + +#define iwl_mld_link_dereference_check(mld_vif, link_id) \ + rcu_dereference_check((mld_vif)->link[link_id], \ + lockdep_is_held(&mld_vif->mld->wiphy->mtx)) + +#define for_each_mld_vif_valid_link(mld_vif, mld_link) \ + for (int link_id = 0; link_id < ARRAY_SIZE((mld_vif)->link); \ + link_id++) \ + if ((mld_link = iwl_mld_link_dereference_check(mld_vif, link_id))) + +/* Retrieve pointer to mld link from mac80211 structures */ +static inline struct iwl_mld_link * +iwl_mld_link_from_mac80211(struct ieee80211_bss_conf *bss_conf) +{ + struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(bss_conf->vif); + + return iwl_mld_link_dereference_check(mld_vif, bss_conf->link_id); +} + +int iwl_mld_mac80211_iftype_to_fw(const struct ieee80211_vif *vif); + +/* Cleanup function for struct iwl_mld_vif, will be called in restart */ +void iwl_mld_cleanup_vif(void *data, u8 *mac, struct ieee80211_vif *vif); +int iwl_mld_mac_fw_action(struct iwl_mld *mld, struct ieee80211_vif *vif, + u32 action); +int iwl_mld_add_vif(struct iwl_mld *mld, struct ieee80211_vif *vif); +int iwl_mld_rm_vif(struct iwl_mld *mld, struct ieee80211_vif *vif); +void iwl_mld_set_vif_associated(struct iwl_mld *mld, + struct ieee80211_vif *vif); +u8 iwl_mld_get_fw_bss_vifs_ids(struct iwl_mld *mld); +void iwl_mld_handle_probe_resp_data_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt); + +void iwl_mld_handle_datapath_monitor_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt); + +void iwl_mld_handle_uapsd_misbehaving_ap_notif(struct iwl_mld *mld, + struct iwl_rx_packet *pkt); + +void iwl_mld_reset_cca_40mhz_workaround(struct iwl_mld *mld, + struct ieee80211_vif *vif); + +static inline bool iwl_mld_vif_low_latency(const struct iwl_mld_vif *mld_vif) +{ + return !!mld_vif->low_latency_causes; +} + +struct ieee80211_vif *iwl_mld_get_bss_vif(struct iwl_mld *mld); + +#endif /* __iwl_mld_iface_h__ */