diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/mac80211.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/mac80211.c | 2498 |
1 files changed, 2498 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c new file mode 100644 index 00000000000..98556d03c1e --- /dev/null +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -0,0 +1,2498 @@ +/****************************************************************************** + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, + * USA + * + * The full GNU General Public License is included in this distribution + * in the file called COPYING. + * + * Contact Information: + * Intel Linux Wireless <ilw@linux.intel.com> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + * BSD LICENSE + * + * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *****************************************************************************/ +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ip.h> +#include <linux/if_arp.h> +#include <net/mac80211.h> +#include <net/ieee80211_radiotap.h> +#include <net/tcp.h> + +#include "iwl-op-mode.h" +#include "iwl-io.h" +#include "mvm.h" +#include "sta.h" +#include "time-event.h" +#include "iwl-eeprom-parse.h" +#include "fw-api-scan.h" +#include "iwl-phy-db.h" +#include "testmode.h" + +static const struct ieee80211_iface_limit iwl_mvm_limits[] = { + { + .max = 1, + .types = BIT(NL80211_IFTYPE_STATION), + }, + { + .max = 1, + .types = BIT(NL80211_IFTYPE_AP) | + BIT(NL80211_IFTYPE_P2P_CLIENT) | + BIT(NL80211_IFTYPE_P2P_GO), + }, + { + .max = 1, + .types = BIT(NL80211_IFTYPE_P2P_DEVICE), + }, +}; + +static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = { + { + .num_different_channels = 1, + .max_interfaces = 3, + .limits = iwl_mvm_limits, + .n_limits = ARRAY_SIZE(iwl_mvm_limits), + }, +}; + +#ifdef CONFIG_PM_SLEEP +static const struct nl80211_wowlan_tcp_data_token_feature +iwl_mvm_wowlan_tcp_token_feature = { + .min_len = 0, + .max_len = 255, + .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS, +}; + +static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = { + .tok = &iwl_mvm_wowlan_tcp_token_feature, + .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN - + sizeof(struct ethhdr) - + sizeof(struct iphdr) - + sizeof(struct tcphdr), + .data_interval_max = 65535, /* __le16 in API */ + .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN - + sizeof(struct ethhdr) - + sizeof(struct iphdr) - + sizeof(struct tcphdr), + .seq = true, +}; +#endif + +#ifdef CONFIG_IWLWIFI_BCAST_FILTERING +/* + * Use the reserved field to indicate magic values. + * these values will only be used internally by the driver, + * and won't make it to the fw (reserved will be 0). + * BC_FILTER_MAGIC_IP - configure the val of this attribute to + * be the vif's ip address. in case there is not a single + * ip address (0, or more than 1), this attribute will + * be skipped. + * BC_FILTER_MAGIC_MAC - set the val of this attribute to + * the LSB bytes of the vif's mac address + */ +enum { + BC_FILTER_MAGIC_NONE = 0, + BC_FILTER_MAGIC_IP, + BC_FILTER_MAGIC_MAC, +}; + +static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = { + { + /* arp */ + .discard = 0, + .frame_type = BCAST_FILTER_FRAME_TYPE_ALL, + .attrs = { + { + /* frame type - arp, hw type - ethernet */ + .offset_type = + BCAST_FILTER_OFFSET_PAYLOAD_START, + .offset = sizeof(rfc1042_header), + .val = cpu_to_be32(0x08060001), + .mask = cpu_to_be32(0xffffffff), + }, + { + /* arp dest ip */ + .offset_type = + BCAST_FILTER_OFFSET_PAYLOAD_START, + .offset = sizeof(rfc1042_header) + 2 + + sizeof(struct arphdr) + + ETH_ALEN + sizeof(__be32) + + ETH_ALEN, + .mask = cpu_to_be32(0xffffffff), + /* mark it as special field */ + .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP), + }, + }, + }, + { + /* dhcp offer bcast */ + .discard = 0, + .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4, + .attrs = { + { + /* udp dest port - 68 (bootp client)*/ + .offset_type = BCAST_FILTER_OFFSET_IP_END, + .offset = offsetof(struct udphdr, dest), + .val = cpu_to_be32(0x00440000), + .mask = cpu_to_be32(0xffff0000), + }, + { + /* dhcp - lsb bytes of client hw address */ + .offset_type = BCAST_FILTER_OFFSET_IP_END, + .offset = 38, + .mask = cpu_to_be32(0xffffffff), + /* mark it as special field */ + .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC), + }, + }, + }, + /* last filter must be empty */ + {}, +}; +#endif + +void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type) +{ + if (!iwl_mvm_is_d0i3_supported(mvm)) + return; + + IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type); + WARN_ON(test_and_set_bit(ref_type, mvm->ref_bitmap)); + iwl_trans_ref(mvm->trans); +} + +void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type) +{ + if (!iwl_mvm_is_d0i3_supported(mvm)) + return; + + IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type); + WARN_ON(!test_and_clear_bit(ref_type, mvm->ref_bitmap)); + iwl_trans_unref(mvm->trans); +} + +static void +iwl_mvm_unref_all_except(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref) +{ + int i; + + if (!iwl_mvm_is_d0i3_supported(mvm)) + return; + + for_each_set_bit(i, mvm->ref_bitmap, IWL_MVM_REF_COUNT) { + if (ref == i) + continue; + + IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d\n", i); + clear_bit(i, mvm->ref_bitmap); + iwl_trans_unref(mvm->trans); + } +} + +static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm) +{ + int i; + + memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts)); + for (i = 0; i < NUM_PHY_CTX; i++) { + mvm->phy_ctxts[i].id = i; + mvm->phy_ctxts[i].ref = 0; + } +} + +static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) +{ + /* we create the 802.11 header and SSID element */ + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) + return mvm->fw->ucode_capa.max_probe_length - 24 - 2; + return mvm->fw->ucode_capa.max_probe_length - 24 - 34; +} + +int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm) +{ + struct ieee80211_hw *hw = mvm->hw; + int num_mac, ret, i; + + /* Tell mac80211 our characteristics */ + hw->flags = IEEE80211_HW_SIGNAL_DBM | + IEEE80211_HW_SPECTRUM_MGMT | + IEEE80211_HW_REPORTS_TX_ACK_STATUS | + IEEE80211_HW_QUEUE_CONTROL | + IEEE80211_HW_WANT_MONITOR_VIF | + IEEE80211_HW_SUPPORTS_PS | + IEEE80211_HW_SUPPORTS_DYNAMIC_PS | + IEEE80211_HW_AMPDU_AGGREGATION | + IEEE80211_HW_TIMING_BEACON_ONLY | + IEEE80211_HW_CONNECTION_MONITOR | + IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | + IEEE80211_HW_SUPPORTS_STATIC_SMPS; + + hw->queues = mvm->first_agg_queue; + hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE; + hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC | + IEEE80211_RADIOTAP_MCS_HAVE_STBC; + hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC; + hw->rate_control_algorithm = "iwl-mvm-rs"; + + /* + * Enable 11w if advertised by firmware and software crypto + * is not enabled (as the firmware will interpret some mgmt + * packets, so enabling it with software crypto isn't safe) + */ + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && + !iwlwifi_mod_params.sw_crypto) + hw->flags |= IEEE80211_HW_MFP_CAPABLE; + + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT && + IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 && + !iwlwifi_mod_params.uapsd_disable) { + hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD; + hw->uapsd_queues = IWL_UAPSD_AC_INFO; + hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP; + } + + hw->sta_data_size = sizeof(struct iwl_mvm_sta); + hw->vif_data_size = sizeof(struct iwl_mvm_vif); + hw->chanctx_data_size = sizeof(u16); + + hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | + BIT(NL80211_IFTYPE_P2P_CLIENT) | + BIT(NL80211_IFTYPE_AP) | + BIT(NL80211_IFTYPE_P2P_GO) | + BIT(NL80211_IFTYPE_P2P_DEVICE) | + BIT(NL80211_IFTYPE_ADHOC); + + hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; + hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | + REGULATORY_DISABLE_BEACON_HINTS; + + if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD) + hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD; + + if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW) + hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH; + + hw->wiphy->iface_combinations = iwl_mvm_iface_combinations; + hw->wiphy->n_iface_combinations = + ARRAY_SIZE(iwl_mvm_iface_combinations); + + hw->wiphy->max_remain_on_channel_duration = 10000; + hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; + + /* Extract MAC address */ + memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN); + hw->wiphy->addresses = mvm->addresses; + hw->wiphy->n_addresses = 1; + + /* Extract additional MAC addresses if available */ + num_mac = (mvm->nvm_data->n_hw_addrs > 1) ? + min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1; + + for (i = 1; i < num_mac; i++) { + memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr, + ETH_ALEN); + mvm->addresses[i].addr[5]++; + hw->wiphy->n_addresses++; + } + + iwl_mvm_reset_phy_ctxts(mvm); + + hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm); + + hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; + + if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) + hw->wiphy->bands[IEEE80211_BAND_2GHZ] = + &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; + if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) + hw->wiphy->bands[IEEE80211_BAND_5GHZ] = + &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; + + hw->wiphy->hw_version = mvm->trans->hw_id; + + if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM) + hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; + else + hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; + + hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; + hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX; + hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES; + /* we create the 802.11 header and zero length SSID IE. */ + hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2; + + hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN | + NL80211_FEATURE_P2P_GO_OPPPS; + + mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; + + /* currently FW API supports only one optional cipher scheme */ + if (mvm->fw->cs[0].cipher) { + mvm->hw->n_cipher_schemes = 1; + mvm->hw->cipher_schemes = &mvm->fw->cs[0]; + } + +#ifdef CONFIG_PM_SLEEP + if (iwl_mvm_is_d0i3_supported(mvm) && + device_can_wakeup(mvm->trans->dev)) { + mvm->wowlan.flags = WIPHY_WOWLAN_ANY; + hw->wiphy->wowlan = &mvm->wowlan; + } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len && + mvm->trans->ops->d3_suspend && + mvm->trans->ops->d3_resume && + device_can_wakeup(mvm->trans->dev)) { + mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT | + WIPHY_WOWLAN_DISCONNECT | + WIPHY_WOWLAN_EAP_IDENTITY_REQ | + WIPHY_WOWLAN_RFKILL_RELEASE; + if (!iwlwifi_mod_params.sw_crypto) + mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | + WIPHY_WOWLAN_GTK_REKEY_FAILURE | + WIPHY_WOWLAN_4WAY_HANDSHAKE; + + mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS; + mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN; + mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN; + mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support; + hw->wiphy->wowlan = &mvm->wowlan; + } +#endif + +#ifdef CONFIG_IWLWIFI_BCAST_FILTERING + /* assign default bcast filtering configuration */ + mvm->bcast_filters = iwl_mvm_default_bcast_filters; +#endif + + ret = iwl_mvm_leds_init(mvm); + if (ret) + return ret; + + ret = ieee80211_register_hw(mvm->hw); + if (ret) + iwl_mvm_leds_exit(mvm); + + return ret; +} + +static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm, + struct ieee80211_sta *sta, + struct sk_buff *skb) +{ + struct iwl_mvm_sta *mvmsta; + bool defer = false; + + /* + * double check the IN_D0I3 flag both before and after + * taking the spinlock, in order to prevent taking + * the spinlock when not needed. + */ + if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))) + return false; + + spin_lock(&mvm->d0i3_tx_lock); + /* + * testing the flag again ensures the skb dequeue + * loop (on d0i3 exit) hasn't run yet. + */ + if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) + goto out; + + mvmsta = iwl_mvm_sta_from_mac80211(sta); + if (mvmsta->sta_id == IWL_MVM_STATION_COUNT || + mvmsta->sta_id != mvm->d0i3_ap_sta_id) + goto out; + + __skb_queue_tail(&mvm->d0i3_tx, skb); + ieee80211_stop_queues(mvm->hw); + + /* trigger wakeup */ + iwl_mvm_ref(mvm, IWL_MVM_REF_TX); + iwl_mvm_unref(mvm, IWL_MVM_REF_TX); + + defer = true; +out: + spin_unlock(&mvm->d0i3_tx_lock); + return defer; +} + +static void iwl_mvm_mac_tx(struct ieee80211_hw *hw, + struct ieee80211_tx_control *control, + struct sk_buff *skb) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct ieee80211_sta *sta = control->sta; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (void *)skb->data; + + if (iwl_mvm_is_radio_killed(mvm)) { + IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n"); + goto drop; + } + + if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && + !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) + goto drop; + + /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */ + if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER && + ieee80211_is_mgmt(hdr->frame_control) && + !ieee80211_is_deauth(hdr->frame_control) && + !ieee80211_is_disassoc(hdr->frame_control) && + !ieee80211_is_action(hdr->frame_control))) + sta = NULL; + + if (sta) { + if (iwl_mvm_defer_tx(mvm, sta, skb)) + return; + if (iwl_mvm_tx_skb(mvm, skb, sta)) + goto drop; + return; + } + + if (iwl_mvm_tx_skb_non_sta(mvm, skb)) + goto drop; + return; + drop: + ieee80211_free_txskb(hw, skb); +} + +static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) +{ + if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) + return false; + return true; +} + +static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) +{ + if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) + return false; + if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) + return true; + + /* enabled by default */ + return true; +} + +static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + enum ieee80211_ampdu_mlme_action action, + struct ieee80211_sta *sta, u16 tid, + u16 *ssn, u8 buf_size) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + bool tx_agg_ref = false; + + IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n", + sta->addr, tid, action); + + if (!(mvm->nvm_data->sku_cap_11n_enable)) + return -EACCES; + + /* return from D0i3 before starting a new Tx aggregation */ + switch (action) { + case IEEE80211_AMPDU_TX_START: + case IEEE80211_AMPDU_TX_STOP_CONT: + case IEEE80211_AMPDU_TX_STOP_FLUSH: + case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: + case IEEE80211_AMPDU_TX_OPERATIONAL: + iwl_mvm_ref(mvm, IWL_MVM_REF_TX_AGG); + tx_agg_ref = true; + + /* + * for tx start, wait synchronously until D0i3 exit to + * get the correct sequence number for the tid. + * additionally, some other ampdu actions use direct + * target access, which is not handled automatically + * by the trans layer (unlike commands), so wait for + * d0i3 exit in these cases as well. + */ + if (!wait_event_timeout(mvm->d0i3_exit_waitq, + !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status), HZ)) { + WARN_ON_ONCE(1); + iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG); + return -EIO; + } + break; + default: + break; + } + + mutex_lock(&mvm->mutex); + + switch (action) { + case IEEE80211_AMPDU_RX_START: + if (!iwl_enable_rx_ampdu(mvm->cfg)) { + ret = -EINVAL; + break; + } + ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true); + break; + case IEEE80211_AMPDU_RX_STOP: + ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false); + break; + case IEEE80211_AMPDU_TX_START: + if (!iwl_enable_tx_ampdu(mvm->cfg)) { + ret = -EINVAL; + break; + } + ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn); + break; + case IEEE80211_AMPDU_TX_STOP_CONT: + ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid); + break; + case IEEE80211_AMPDU_TX_STOP_FLUSH: + case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: + ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid); + break; + case IEEE80211_AMPDU_TX_OPERATIONAL: + ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size); + break; + default: + WARN_ON_ONCE(1); + ret = -EINVAL; + break; + } + mutex_unlock(&mvm->mutex); + + /* + * If the tid is marked as started, we won't use it for offloaded + * traffic on the next D0i3 entry. It's safe to unref. + */ + if (tx_agg_ref) + iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG); + + return ret; +} + +static void iwl_mvm_cleanup_iterator(void *data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = data; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + mvmvif->uploaded = false; + mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; + + /* does this make sense at all? */ + mvmvif->color++; + + spin_lock_bh(&mvm->time_event_lock); + iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data); + spin_unlock_bh(&mvm->time_event_lock); + + mvmvif->phy_ctxt = NULL; +} + +static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm) +{ +#ifdef CONFIG_IWLWIFI_DEBUGFS + static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL }; + + iwl_mvm_fw_error_dump(mvm); + + /* notify the userspace about the error we had */ + kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env); +#endif + + iwl_trans_stop_device(mvm->trans); + + mvm->scan_status = IWL_MVM_SCAN_NONE; + + /* just in case one was running */ + ieee80211_remain_on_channel_expired(mvm->hw); + + ieee80211_iterate_active_interfaces_atomic( + mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + iwl_mvm_cleanup_iterator, mvm); + + mvm->p2p_device_vif = NULL; + mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; + + iwl_mvm_reset_phy_ctxts(mvm); + memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table)); + memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained)); + + ieee80211_wake_queues(mvm->hw); + + /* cleanup all stale references (scan, roc), but keep the + * ucode_down ref until reconfig is complete */ + iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN); + + mvm->vif_count = 0; + mvm->rx_ba_sessions = 0; +} + +static int iwl_mvm_mac_start(struct ieee80211_hw *hw) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + mutex_lock(&mvm->mutex); + + /* Clean up some internal and mac80211 state on restart */ + if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) + iwl_mvm_restart_cleanup(mvm); + + ret = iwl_mvm_up(mvm); + mutex_unlock(&mvm->mutex); + + return ret; +} + +static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + mutex_lock(&mvm->mutex); + + clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); + iwl_mvm_d0i3_enable_tx(mvm, NULL); + ret = iwl_mvm_update_quotas(mvm, NULL); + if (ret) + IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n", + ret); + + /* allow transport/FW low power modes */ + iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN); + + mutex_unlock(&mvm->mutex); +} + +static void iwl_mvm_mac_stop(struct ieee80211_hw *hw) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + flush_work(&mvm->d0i3_exit_work); + flush_work(&mvm->async_handlers_wk); + + mutex_lock(&mvm->mutex); + + /* disallow low power states when the FW is down */ + iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN); + + /* async_handlers_wk is now blocked */ + + /* + * The work item could be running or queued if the + * ROC time event stops just as we get here. + */ + cancel_work_sync(&mvm->roc_done_wk); + + iwl_trans_stop_device(mvm->trans); + + iwl_mvm_async_handlers_purge(mvm); + /* async_handlers_list is empty and will stay empty: HW is stopped */ + + /* the fw is stopped, the aux sta is dead: clean up driver state */ + iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); + + mutex_unlock(&mvm->mutex); + + /* + * The worker might have been waiting for the mutex, let it run and + * discover that its list is now empty. + */ + cancel_work_sync(&mvm->async_handlers_wk); +} + +static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm) +{ + u16 i; + + lockdep_assert_held(&mvm->mutex); + + for (i = 0; i < NUM_PHY_CTX; i++) + if (!mvm->phy_ctxts[i].ref) + return &mvm->phy_ctxts[i]; + + IWL_ERR(mvm, "No available PHY context\n"); + return NULL; +} + +static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + s8 tx_power) +{ + /* FW is in charge of regulatory enforcement */ + struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = { + .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id, + .pwr_restriction = cpu_to_le16(tx_power), + }; + + return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, + sizeof(reduce_txpwr_cmd), + &reduce_txpwr_cmd); +} + +static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ret; + + /* + * Not much to do here. The stack will not allow interface + * types or combinations that we didn't advertise, so we + * don't really have to check the types. + */ + + mutex_lock(&mvm->mutex); + + /* Allocate resources for the MAC context, and add it to the fw */ + ret = iwl_mvm_mac_ctxt_init(mvm, vif); + if (ret) + goto out_unlock; + + /* Counting number of interfaces is needed for legacy PM */ + if (vif->type != NL80211_IFTYPE_P2P_DEVICE) + mvm->vif_count++; + + /* + * The AP binding flow can be done only after the beacon + * template is configured (which happens only in the mac80211 + * start_ap() flow), and adding the broadcast station can happen + * only after the binding. + * In addition, since modifying the MAC before adding a bcast + * station is not allowed by the FW, delay the adding of MAC context to + * the point where we can also add the bcast station. + * In short: there's not much we can do at this point, other than + * allocating resources :) + */ + if (vif->type == NL80211_IFTYPE_AP || + vif->type == NL80211_IFTYPE_ADHOC) { + u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif); + ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, + qmask, + ieee80211_vif_type_p2p(vif)); + if (ret) { + IWL_ERR(mvm, "Failed to allocate bcast sta\n"); + goto out_release; + } + + iwl_mvm_vif_dbgfs_register(mvm, vif); + goto out_unlock; + } + + ret = iwl_mvm_mac_ctxt_add(mvm, vif); + if (ret) + goto out_release; + + ret = iwl_mvm_power_update_mac(mvm); + if (ret) + goto out_release; + + /* beacon filtering */ + ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0); + if (ret) + goto out_remove_mac; + + if (!mvm->bf_allowed_vif && + vif->type == NL80211_IFTYPE_STATION && !vif->p2p) { + mvm->bf_allowed_vif = mvmvif; + vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | + IEEE80211_VIF_SUPPORTS_CQM_RSSI; + } + + /* + * P2P_DEVICE interface does not have a channel context assigned to it, + * so a dedicated PHY context is allocated to it and the corresponding + * MAC context is bound to it at this stage. + */ + if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { + + mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); + if (!mvmvif->phy_ctxt) { + ret = -ENOSPC; + goto out_free_bf; + } + + iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); + ret = iwl_mvm_binding_add_vif(mvm, vif); + if (ret) + goto out_unref_phy; + + ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta); + if (ret) + goto out_unbind; + + /* Save a pointer to p2p device vif, so it can later be used to + * update the p2p device MAC when a GO is started/stopped */ + mvm->p2p_device_vif = vif; + } + + iwl_mvm_vif_dbgfs_register(mvm, vif); + goto out_unlock; + + out_unbind: + iwl_mvm_binding_remove_vif(mvm, vif); + out_unref_phy: + iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); + out_free_bf: + if (mvm->bf_allowed_vif == mvmvif) { + mvm->bf_allowed_vif = NULL; + vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER | + IEEE80211_VIF_SUPPORTS_CQM_RSSI); + } + out_remove_mac: + mvmvif->phy_ctxt = NULL; + iwl_mvm_mac_ctxt_remove(mvm, vif); + out_release: + if (vif->type != NL80211_IFTYPE_P2P_DEVICE) + mvm->vif_count--; + + iwl_mvm_mac_ctxt_release(mvm, vif); + out_unlock: + mutex_unlock(&mvm->mutex); + + return ret; +} + +static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + u32 tfd_msk = 0, ac; + + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) + if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) + tfd_msk |= BIT(vif->hw_queue[ac]); + + if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE) + tfd_msk |= BIT(vif->cab_queue); + + if (tfd_msk) { + mutex_lock(&mvm->mutex); + iwl_mvm_flush_tx_path(mvm, tfd_msk, true); + mutex_unlock(&mvm->mutex); + } + + if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { + /* + * Flush the ROC worker which will flush the OFFCHANNEL queue. + * We assume here that all the packets sent to the OFFCHANNEL + * queue are sent in ROC session. + */ + flush_work(&mvm->roc_done_wk); + } else { + /* + * By now, all the AC queues are empty. The AGG queues are + * empty too. We already got all the Tx responses for all the + * packets in the queues. The drain work can have been + * triggered. Flush it. + */ + flush_work(&mvm->sta_drained_wk); + } +} + +static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + iwl_mvm_prepare_mac_removal(mvm, vif); + + mutex_lock(&mvm->mutex); + + if (mvm->bf_allowed_vif == mvmvif) { + mvm->bf_allowed_vif = NULL; + vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER | + IEEE80211_VIF_SUPPORTS_CQM_RSSI); + } + + iwl_mvm_vif_dbgfs_clean(mvm, vif); + + /* + * For AP/GO interface, the tear down of the resources allocated to the + * interface is be handled as part of the stop_ap flow. + */ + if (vif->type == NL80211_IFTYPE_AP || + vif->type == NL80211_IFTYPE_ADHOC) { +#ifdef CONFIG_NL80211_TESTMODE + if (vif == mvm->noa_vif) { + mvm->noa_vif = NULL; + mvm->noa_duration = 0; + } +#endif + iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); + goto out_release; + } + + if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { + mvm->p2p_device_vif = NULL; + iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta); + iwl_mvm_binding_remove_vif(mvm, vif); + iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); + mvmvif->phy_ctxt = NULL; + } + + if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE) + mvm->vif_count--; + + iwl_mvm_power_update_mac(mvm); + iwl_mvm_mac_ctxt_remove(mvm, vif); + +out_release: + iwl_mvm_mac_ctxt_release(mvm, vif); + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed) +{ + return 0; +} + +struct iwl_mvm_mc_iter_data { + struct iwl_mvm *mvm; + int port_id; +}; + +static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_mc_iter_data *data = _data; + struct iwl_mvm *mvm = data->mvm; + struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd; + int ret, len; + + /* if we don't have free ports, mcast frames will be dropped */ + if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM)) + return; + + if (vif->type != NL80211_IFTYPE_STATION || + !vif->bss_conf.assoc) + return; + + cmd->port_id = data->port_id++; + memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN); + len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4); + + ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd); + if (ret) + IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret); +} + +static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm) +{ + struct iwl_mvm_mc_iter_data iter_data = { + .mvm = mvm, + }; + + lockdep_assert_held(&mvm->mutex); + + if (WARN_ON_ONCE(!mvm->mcast_filter_cmd)) + return; + + ieee80211_iterate_active_interfaces_atomic( + mvm->hw, IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_mc_iface_iterator, &iter_data); +} + +static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw, + struct netdev_hw_addr_list *mc_list) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mcast_filter_cmd *cmd; + struct netdev_hw_addr *addr; + int addr_count = netdev_hw_addr_list_count(mc_list); + bool pass_all = false; + int len; + + if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) { + pass_all = true; + addr_count = 0; + } + + len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4); + cmd = kzalloc(len, GFP_ATOMIC); + if (!cmd) + return 0; + + if (pass_all) { + cmd->pass_all = 1; + return (u64)(unsigned long)cmd; + } + + netdev_hw_addr_list_for_each(addr, mc_list) { + IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n", + cmd->count, addr->addr); + memcpy(&cmd->addr_list[cmd->count * ETH_ALEN], + addr->addr, ETH_ALEN); + cmd->count++; + } + + return (u64)(unsigned long)cmd; +} + +static void iwl_mvm_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + u64 multicast) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast; + + mutex_lock(&mvm->mutex); + + /* replace previous configuration */ + kfree(mvm->mcast_filter_cmd); + mvm->mcast_filter_cmd = cmd; + + if (!cmd) + goto out; + + iwl_mvm_recalc_multicast(mvm); +out: + mutex_unlock(&mvm->mutex); + *total_flags = 0; +} + +#ifdef CONFIG_IWLWIFI_BCAST_FILTERING +struct iwl_bcast_iter_data { + struct iwl_mvm *mvm; + struct iwl_bcast_filter_cmd *cmd; + u8 current_filter; +}; + +static void +iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif, + const struct iwl_fw_bcast_filter *in_filter, + struct iwl_fw_bcast_filter *out_filter) +{ + struct iwl_fw_bcast_filter_attr *attr; + int i; + + memcpy(out_filter, in_filter, sizeof(*out_filter)); + + for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) { + attr = &out_filter->attrs[i]; + + if (!attr->mask) + break; + + switch (attr->reserved1) { + case cpu_to_le16(BC_FILTER_MAGIC_IP): + if (vif->bss_conf.arp_addr_cnt != 1) { + attr->mask = 0; + continue; + } + + attr->val = vif->bss_conf.arp_addr_list[0]; + break; + case cpu_to_le16(BC_FILTER_MAGIC_MAC): + attr->val = *(__be32 *)&vif->addr[2]; + break; + default: + break; + } + attr->reserved1 = 0; + out_filter->num_attrs++; + } +} + +static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_bcast_iter_data *data = _data; + struct iwl_mvm *mvm = data->mvm; + struct iwl_bcast_filter_cmd *cmd = data->cmd; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_fw_bcast_mac *bcast_mac; + int i; + + if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs))) + return; + + bcast_mac = &cmd->macs[mvmvif->id]; + + /* + * enable filtering only for associated stations, but not for P2P + * Clients + */ + if (vif->type != NL80211_IFTYPE_STATION || vif->p2p || + !vif->bss_conf.assoc) + return; + + bcast_mac->default_discard = 1; + + /* copy all configured filters */ + for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) { + /* + * Make sure we don't exceed our filters limit. + * if there is still a valid filter to be configured, + * be on the safe side and just allow bcast for this mac. + */ + if (WARN_ON_ONCE(data->current_filter >= + ARRAY_SIZE(cmd->filters))) { + bcast_mac->default_discard = 0; + bcast_mac->attached_filters = 0; + break; + } + + iwl_mvm_set_bcast_filter(vif, + &mvm->bcast_filters[i], + &cmd->filters[data->current_filter]); + + /* skip current filter if it contains no attributes */ + if (!cmd->filters[data->current_filter].num_attrs) + continue; + + /* attach the filter to current mac */ + bcast_mac->attached_filters |= + cpu_to_le16(BIT(data->current_filter)); + + data->current_filter++; + } +} + +bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm, + struct iwl_bcast_filter_cmd *cmd) +{ + struct iwl_bcast_iter_data iter_data = { + .mvm = mvm, + .cmd = cmd, + }; + + memset(cmd, 0, sizeof(*cmd)); + cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters); + cmd->max_macs = ARRAY_SIZE(cmd->macs); + +#ifdef CONFIG_IWLWIFI_DEBUGFS + /* use debugfs filters/macs if override is configured */ + if (mvm->dbgfs_bcast_filtering.override) { + memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters, + sizeof(cmd->filters)); + memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs, + sizeof(cmd->macs)); + return true; + } +#endif + + /* if no filters are configured, do nothing */ + if (!mvm->bcast_filters) + return false; + + /* configure and attach these filters for each associated sta vif */ + ieee80211_iterate_active_interfaces( + mvm->hw, IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_bcast_filter_iterator, &iter_data); + + return true; +} +static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + struct iwl_bcast_filter_cmd cmd; + + if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING)) + return 0; + + if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd)) + return 0; + + return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0, + sizeof(cmd), &cmd); +} +#else +static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + return 0; +} +#endif + +static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changes) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ret; + + /* + * Re-calculate the tsf id, as the master-slave relations depend on the + * beacon interval, which was not known when the station interface was + * added. + */ + if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) + iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif); + + ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false); + if (ret) + IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr); + + if (changes & BSS_CHANGED_ASSOC) { + if (bss_conf->assoc) { + /* add quota for this interface */ + ret = iwl_mvm_update_quotas(mvm, vif); + if (ret) { + IWL_ERR(mvm, "failed to update quotas\n"); + return; + } + + if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, + &mvm->status)) { + /* + * If we're restarting then the firmware will + * obviously have lost synchronisation with + * the AP. It will attempt to synchronise by + * itself, but we can make it more reliable by + * scheduling a session protection time event. + * + * The firmware needs to receive a beacon to + * catch up with synchronisation, use 110% of + * the beacon interval. + * + * Set a large maximum delay to allow for more + * than a single interface. + */ + u32 dur = (11 * vif->bss_conf.beacon_int) / 10; + iwl_mvm_protect_session(mvm, vif, dur, dur, + 5 * dur); + } + + iwl_mvm_sf_update(mvm, vif, false); + iwl_mvm_power_vif_assoc(mvm, vif); + if (vif->p2p) + iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT); + } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { + /* + * If update fails - SF might be running in associated + * mode while disassociated - which is forbidden. + */ + WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false), + "Failed to update SF upon disassociation\n"); + + /* remove AP station now that the MAC is unassoc */ + ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id); + if (ret) + IWL_ERR(mvm, "failed to remove AP station\n"); + + if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) + mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; + mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; + /* remove quota for this interface */ + ret = iwl_mvm_update_quotas(mvm, NULL); + if (ret) + IWL_ERR(mvm, "failed to update quotas\n"); + + if (vif->p2p) + iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT); + } + + iwl_mvm_recalc_multicast(mvm); + iwl_mvm_configure_bcast_filter(mvm, vif); + + /* reset rssi values */ + mvmvif->bf_data.ave_beacon_signal = 0; + + iwl_mvm_bt_coex_vif_change(mvm); + iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, + IEEE80211_SMPS_AUTOMATIC); + } else if (changes & BSS_CHANGED_BEACON_INFO) { + /* + * We received a beacon _after_ association so + * remove the session protection. + */ + iwl_mvm_remove_time_event(mvm, mvmvif, + &mvmvif->time_event_data); + iwl_mvm_sf_update(mvm, vif, false); + WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0)); + } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | + BSS_CHANGED_QOS)) { + ret = iwl_mvm_power_update_mac(mvm); + if (ret) + IWL_ERR(mvm, "failed to update power mode\n"); + } + if (changes & BSS_CHANGED_TXPOWER) { + IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n", + bss_conf->txpower); + iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower); + } + + if (changes & BSS_CHANGED_CQM) { + IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n"); + /* reset cqm events tracking */ + mvmvif->bf_data.last_cqm_event = 0; + if (mvmvif->bf_data.bf_enabled) { + ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0); + if (ret) + IWL_ERR(mvm, + "failed to update CQM thresholds\n"); + } + } + + if (changes & BSS_CHANGED_ARP_FILTER) { + IWL_DEBUG_MAC80211(mvm, "arp filter changed\n"); + iwl_mvm_configure_bcast_filter(mvm, vif); + } +} + +static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ret; + + mutex_lock(&mvm->mutex); + + /* Send the beacon template */ + ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif); + if (ret) + goto out_unlock; + + /* + * Re-calculate the tsf id, as the master-slave relations depend on the + * beacon interval, which was not known when the AP interface was added. + */ + if (vif->type == NL80211_IFTYPE_AP) + iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif); + + /* Add the mac context */ + ret = iwl_mvm_mac_ctxt_add(mvm, vif); + if (ret) + goto out_unlock; + + /* Perform the binding */ + ret = iwl_mvm_binding_add_vif(mvm, vif); + if (ret) + goto out_remove; + + /* Send the bcast station. At this stage the TBTT and DTIM time events + * are added and applied to the scheduler */ + ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta); + if (ret) + goto out_unbind; + + /* must be set before quota calculations */ + mvmvif->ap_ibss_active = true; + + /* power updated needs to be done before quotas */ + iwl_mvm_power_update_mac(mvm); + + ret = iwl_mvm_update_quotas(mvm, vif); + if (ret) + goto out_quota_failed; + + /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */ + if (vif->p2p && mvm->p2p_device_vif) + iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false); + + iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS); + + iwl_mvm_bt_coex_vif_change(mvm); + + mutex_unlock(&mvm->mutex); + return 0; + +out_quota_failed: + iwl_mvm_power_update_mac(mvm); + mvmvif->ap_ibss_active = false; + iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta); +out_unbind: + iwl_mvm_binding_remove_vif(mvm, vif); +out_remove: + iwl_mvm_mac_ctxt_remove(mvm, vif); +out_unlock: + mutex_unlock(&mvm->mutex); + return ret; +} + +static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + iwl_mvm_prepare_mac_removal(mvm, vif); + + mutex_lock(&mvm->mutex); + + mvmvif->ap_ibss_active = false; + + iwl_mvm_bt_coex_vif_change(mvm); + + iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS); + + /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */ + if (vif->p2p && mvm->p2p_device_vif) + iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false); + + iwl_mvm_update_quotas(mvm, NULL); + iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta); + iwl_mvm_binding_remove_vif(mvm, vif); + + iwl_mvm_power_update_mac(mvm); + + iwl_mvm_mac_ctxt_remove(mvm, vif); + + mutex_unlock(&mvm->mutex); +} + +static void +iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changes) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + /* Changes will be applied when the AP/IBSS is started */ + if (!mvmvif->ap_ibss_active) + return; + + if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT | + BSS_CHANGED_BANDWIDTH) && + iwl_mvm_mac_ctxt_changed(mvm, vif, false)) + IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr); + + /* Need to send a new beacon template to the FW */ + if (changes & BSS_CHANGED_BEACON && + iwl_mvm_mac_ctxt_beacon_changed(mvm, vif)) + IWL_WARN(mvm, "Failed updating beacon data\n"); +} + +static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changes) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + mutex_lock(&mvm->mutex); + + if (changes & BSS_CHANGED_IDLE && !bss_conf->idle) + iwl_mvm_sched_scan_stop(mvm, true); + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes); + break; + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_ADHOC: + iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes); + break; + default: + /* shouldn't happen */ + WARN_ON_ONCE(1); + } + + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_scan_request *req) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS) + return -EINVAL; + + mutex_lock(&mvm->mutex); + + switch (mvm->scan_status) { + case IWL_MVM_SCAN_SCHED: + ret = iwl_mvm_sched_scan_stop(mvm, true); + if (ret) { + ret = -EBUSY; + goto out; + } + break; + case IWL_MVM_SCAN_NONE: + break; + default: + ret = -EBUSY; + goto out; + } + + iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); + + ret = iwl_mvm_scan_request(mvm, vif, req); + if (ret) + iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); +out: + mutex_unlock(&mvm->mutex); + /* make sure to flush the Rx handler before the next scan arrives */ + iwl_mvm_wait_for_async_handlers(mvm); + return ret; +} + +static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + mutex_lock(&mvm->mutex); + + iwl_mvm_cancel_scan(mvm); + + mutex_unlock(&mvm->mutex); +} + +static void +iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, u16 tids, + int num_frames, + enum ieee80211_frame_release_type reason, + bool more_data) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + /* Called when we need to transmit (a) frame(s) from mac80211 */ + + iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames, + tids, more_data, false); +} + +static void +iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, u16 tids, + int num_frames, + enum ieee80211_frame_release_type reason, + bool more_data) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + /* Called when we need to transmit (a) frame(s) from agg queue */ + + iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames, + tids, more_data, true); +} + +static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + enum sta_notify_cmd cmd, + struct ieee80211_sta *sta) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); + int tid; + + switch (cmd) { + case STA_NOTIFY_SLEEP: + if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0) + ieee80211_sta_block_awake(hw, sta, true); + spin_lock_bh(&mvmsta->lock); + for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) { + struct iwl_mvm_tid_data *tid_data; + + tid_data = &mvmsta->tid_data[tid]; + if (tid_data->state != IWL_AGG_ON && + tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA) + continue; + if (iwl_mvm_tid_queued(tid_data) == 0) + continue; + ieee80211_sta_set_buffered(sta, tid, true); + } + spin_unlock_bh(&mvmsta->lock); + /* + * The fw updates the STA to be asleep. Tx packets on the Tx + * queues to this station will not be transmitted. The fw will + * send a Tx response with TX_STATUS_FAIL_DEST_PS. + */ + break; + case STA_NOTIFY_AWAKE: + if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) + break; + iwl_mvm_sta_modify_ps_wake(mvm, sta); + break; + default: + break; + } +} + +static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; + + /* + * This is called before mac80211 does RCU synchronisation, + * so here we already invalidate our internal RCU-protected + * station pointer. The rest of the code will thus no longer + * be able to find the station this way, and we don't rely + * on further RCU synchronisation after the sta_state() + * callback deleted the station. + */ + mutex_lock(&mvm->mutex); + if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id])) + rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], + ERR_PTR(-ENOENT)); + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + enum ieee80211_sta_state old_state, + enum ieee80211_sta_state new_state) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ret; + + IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n", + sta->addr, old_state, new_state); + + /* this would be a mac80211 bug ... but don't crash */ + if (WARN_ON_ONCE(!mvmvif->phy_ctxt)) + return -EINVAL; + + /* if a STA is being removed, reuse its ID */ + flush_work(&mvm->sta_drained_wk); + + mutex_lock(&mvm->mutex); + if (old_state == IEEE80211_STA_NOTEXIST && + new_state == IEEE80211_STA_NONE) { + /* + * Firmware bug - it'll crash if the beacon interval is less + * than 16. We can't avoid connecting at all, so refuse the + * station state change, this will cause mac80211 to abandon + * attempts to connect to this AP, and eventually wpa_s will + * blacklist the AP... + */ + if (vif->type == NL80211_IFTYPE_STATION && + vif->bss_conf.beacon_int < 16) { + IWL_ERR(mvm, + "AP %pM beacon interval is %d, refusing due to firmware bug!\n", + sta->addr, vif->bss_conf.beacon_int); + ret = -EINVAL; + goto out_unlock; + } + ret = iwl_mvm_add_sta(mvm, vif, sta); + } else if (old_state == IEEE80211_STA_NONE && + new_state == IEEE80211_STA_AUTH) { + /* + * EBS may be disabled due to previous failures reported by FW. + * Reset EBS status here assuming environment has been changed. + */ + mvm->last_ebs_successful = true; + ret = 0; + } else if (old_state == IEEE80211_STA_AUTH && + new_state == IEEE80211_STA_ASSOC) { + ret = iwl_mvm_update_sta(mvm, vif, sta); + if (ret == 0) + iwl_mvm_rs_rate_init(mvm, sta, + mvmvif->phy_ctxt->channel->band, + true); + } else if (old_state == IEEE80211_STA_ASSOC && + new_state == IEEE80211_STA_AUTHORIZED) { + /* enable beacon filtering */ + WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0)); + ret = 0; + } else if (old_state == IEEE80211_STA_AUTHORIZED && + new_state == IEEE80211_STA_ASSOC) { + /* disable beacon filtering */ + WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0)); + ret = 0; + } else if (old_state == IEEE80211_STA_ASSOC && + new_state == IEEE80211_STA_AUTH) { + ret = 0; + } else if (old_state == IEEE80211_STA_AUTH && + new_state == IEEE80211_STA_NONE) { + ret = 0; + } else if (old_state == IEEE80211_STA_NONE && + new_state == IEEE80211_STA_NOTEXIST) { + ret = iwl_mvm_rm_sta(mvm, vif, sta); + } else { + ret = -EIO; + } + out_unlock: + mutex_unlock(&mvm->mutex); + + return ret; +} + +static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + mvm->rts_threshold = value; + + return 0; +} + +static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, u32 changed) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + if (vif->type == NL80211_IFTYPE_STATION && + changed & IEEE80211_RC_NSS_CHANGED) + iwl_mvm_sf_update(mvm, vif, false); +} + +static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u16 ac, + const struct ieee80211_tx_queue_params *params) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + mvmvif->queue_params[ac] = *params; + + /* + * No need to update right away, we'll get BSS_CHANGED_QOS + * The exception is P2P_DEVICE interface which needs immediate update. + */ + if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { + int ret; + + mutex_lock(&mvm->mutex); + ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false); + mutex_unlock(&mvm->mutex); + return ret; + } + return 0; +} + +static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS, + 200 + vif->bss_conf.beacon_int); + u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS, + 100 + vif->bss_conf.beacon_int); + + if (WARN_ON_ONCE(vif->bss_conf.assoc)) + return; + + mutex_lock(&mvm->mutex); + /* Try really hard to protect the session and hear a beacon */ + iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500); + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_sched_scan_ies *ies) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + mutex_lock(&mvm->mutex); + + if (!iwl_mvm_is_idle(mvm)) { + ret = -EBUSY; + goto out; + } + + switch (mvm->scan_status) { + case IWL_MVM_SCAN_OS: + IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n"); + ret = iwl_mvm_cancel_scan(mvm); + if (ret) { + ret = -EBUSY; + goto out; + } + + /* + * iwl_mvm_rx_scan_complete() will be called soon but will + * not reset the scan status as it won't be IWL_MVM_SCAN_OS + * any more since we queue the next scan immediately (below). + * We make sure it is called before the next scan starts by + * flushing the async-handlers work. + */ + break; + case IWL_MVM_SCAN_NONE: + break; + default: + ret = -EBUSY; + goto out; + } + + mvm->scan_status = IWL_MVM_SCAN_SCHED; + + ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies); + if (ret) + goto err; + + ret = iwl_mvm_config_sched_scan_profiles(mvm, req); + if (ret) + goto err; + + ret = iwl_mvm_sched_scan_start(mvm, req); + if (!ret) + goto out; +err: + mvm->scan_status = IWL_MVM_SCAN_NONE; +out: + mutex_unlock(&mvm->mutex); + /* make sure to flush the Rx handler before the next scan arrives */ + iwl_mvm_wait_for_async_handlers(mvm); + return ret; +} + +static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + mutex_lock(&mvm->mutex); + ret = iwl_mvm_sched_scan_stop(mvm, false); + mutex_unlock(&mvm->mutex); + iwl_mvm_wait_for_async_handlers(mvm); + + return ret; +} + +static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw, + enum set_key_cmd cmd, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int ret; + + if (iwlwifi_mod_params.sw_crypto) { + IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n"); + return -EOPNOTSUPP; + } + + switch (key->cipher) { + case WLAN_CIPHER_SUITE_TKIP: + key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; + /* fall-through */ + case WLAN_CIPHER_SUITE_CCMP: + key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; + break; + case WLAN_CIPHER_SUITE_AES_CMAC: + WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE)); + break; + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + /* + * Support for TX only, at least for now, so accept + * the key and do nothing else. Then mac80211 will + * pass it for TX but we don't have to use it for RX. + */ + return 0; + default: + /* currently FW supports only one optional cipher scheme */ + if (hw->n_cipher_schemes && + hw->cipher_schemes->cipher == key->cipher) + key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE; + else + return -EOPNOTSUPP; + } + + mutex_lock(&mvm->mutex); + + switch (cmd) { + case SET_KEY: + if ((vif->type == NL80211_IFTYPE_ADHOC || + vif->type == NL80211_IFTYPE_AP) && !sta) { + /* + * GTK on AP interface is a TX-only key, return 0; + * on IBSS they're per-station and because we're lazy + * we don't support them for RX, so do the same. + */ + ret = 0; + key->hw_key_idx = STA_KEY_IDX_INVALID; + break; + } + + IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n"); + ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false); + if (ret) { + IWL_WARN(mvm, "set key failed\n"); + /* + * can't add key for RX, but we don't need it + * in the device for TX so still return 0 + */ + key->hw_key_idx = STA_KEY_IDX_INVALID; + ret = 0; + } + + break; + case DISABLE_KEY: + if (key->hw_key_idx == STA_KEY_IDX_INVALID) { + ret = 0; + break; + } + + IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n"); + ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key); + break; + default: + ret = -EINVAL; + } + + mutex_unlock(&mvm->mutex); + return ret; +} + +static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_key_conf *keyconf, + struct ieee80211_sta *sta, + u32 iv32, u16 *phase1key) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) + return; + + iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key); +} + + +static int iwl_mvm_roc(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_channel *channel, + int duration, + enum ieee80211_roc_type type) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct cfg80211_chan_def chandef; + struct iwl_mvm_phy_ctxt *phy_ctxt; + int ret, i; + + IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value, + duration, type); + + if (vif->type != NL80211_IFTYPE_P2P_DEVICE) { + IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type); + return -EINVAL; + } + + mutex_lock(&mvm->mutex); + + for (i = 0; i < NUM_PHY_CTX; i++) { + phy_ctxt = &mvm->phy_ctxts[i]; + if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt) + continue; + + if (phy_ctxt->ref && channel == phy_ctxt->channel) { + /* + * Unbind the P2P_DEVICE from the current PHY context, + * and if the PHY context is not used remove it. + */ + ret = iwl_mvm_binding_remove_vif(mvm, vif); + if (WARN(ret, "Failed unbinding P2P_DEVICE\n")) + goto out_unlock; + + iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); + + /* Bind the P2P_DEVICE to the current PHY Context */ + mvmvif->phy_ctxt = phy_ctxt; + + ret = iwl_mvm_binding_add_vif(mvm, vif); + if (WARN(ret, "Failed binding P2P_DEVICE\n")) + goto out_unlock; + + iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); + goto schedule_time_event; + } + } + + /* Need to update the PHY context only if the ROC channel changed */ + if (channel == mvmvif->phy_ctxt->channel) + goto schedule_time_event; + + cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); + + /* + * Change the PHY context configuration as it is currently referenced + * only by the P2P Device MAC + */ + if (mvmvif->phy_ctxt->ref == 1) { + ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt, + &chandef, 1, 1); + if (ret) + goto out_unlock; + } else { + /* + * The PHY context is shared with other MACs. Need to remove the + * P2P Device from the binding, allocate an new PHY context and + * create a new binding + */ + phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); + if (!phy_ctxt) { + ret = -ENOSPC; + goto out_unlock; + } + + ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef, + 1, 1); + if (ret) { + IWL_ERR(mvm, "Failed to change PHY context\n"); + goto out_unlock; + } + + /* Unbind the P2P_DEVICE from the current PHY context */ + ret = iwl_mvm_binding_remove_vif(mvm, vif); + if (WARN(ret, "Failed unbinding P2P_DEVICE\n")) + goto out_unlock; + + iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); + + /* Bind the P2P_DEVICE to the new allocated PHY context */ + mvmvif->phy_ctxt = phy_ctxt; + + ret = iwl_mvm_binding_add_vif(mvm, vif); + if (WARN(ret, "Failed binding P2P_DEVICE\n")) + goto out_unlock; + + iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); + } + +schedule_time_event: + /* Schedule the time events */ + ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type); + +out_unlock: + mutex_unlock(&mvm->mutex); + IWL_DEBUG_MAC80211(mvm, "leave\n"); + return ret; +} + +static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + IWL_DEBUG_MAC80211(mvm, "enter\n"); + + mutex_lock(&mvm->mutex); + iwl_mvm_stop_p2p_roc(mvm); + mutex_unlock(&mvm->mutex); + + IWL_DEBUG_MAC80211(mvm, "leave\n"); + return 0; +} + +static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw, + struct ieee80211_chanctx_conf *ctx) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; + struct iwl_mvm_phy_ctxt *phy_ctxt; + int ret; + + IWL_DEBUG_MAC80211(mvm, "Add channel context\n"); + + mutex_lock(&mvm->mutex); + phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); + if (!phy_ctxt) { + ret = -ENOSPC; + goto out; + } + + ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def, + ctx->rx_chains_static, + ctx->rx_chains_dynamic); + if (ret) { + IWL_ERR(mvm, "Failed to add PHY context\n"); + goto out; + } + + iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt); + *phy_ctxt_id = phy_ctxt->id; +out: + mutex_unlock(&mvm->mutex); + return ret; +} + +static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw, + struct ieee80211_chanctx_conf *ctx) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; + struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; + + mutex_lock(&mvm->mutex); + iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt); + mutex_unlock(&mvm->mutex); +} + +static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw, + struct ieee80211_chanctx_conf *ctx, + u32 changed) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; + struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; + + if (WARN_ONCE((phy_ctxt->ref > 1) && + (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH | + IEEE80211_CHANCTX_CHANGE_RX_CHAINS | + IEEE80211_CHANCTX_CHANGE_RADAR | + IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)), + "Cannot change PHY. Ref=%d, changed=0x%X\n", + phy_ctxt->ref, changed)) + return; + + mutex_lock(&mvm->mutex); + iwl_mvm_bt_coex_vif_change(mvm); + iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def, + ctx->rx_chains_static, + ctx->rx_chains_dynamic); + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_chanctx_conf *ctx) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; + struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ret; + + mutex_lock(&mvm->mutex); + + mvmvif->phy_ctxt = phy_ctxt; + + switch (vif->type) { + case NL80211_IFTYPE_AP: + /* Unless it's a CSA flow we have nothing to do here */ + if (vif->csa_active) { + mvmvif->ap_ibss_active = true; + break; + } + case NL80211_IFTYPE_ADHOC: + /* + * The AP binding flow is handled as part of the start_ap flow + * (in bss_info_changed), similarly for IBSS. + */ + ret = 0; + goto out_unlock; + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_MONITOR: + break; + default: + ret = -EINVAL; + goto out_unlock; + } + + ret = iwl_mvm_binding_add_vif(mvm, vif); + if (ret) + goto out_unlock; + + /* + * Power state must be updated before quotas, + * otherwise fw will complain. + */ + iwl_mvm_power_update_mac(mvm); + + /* Setting the quota at this stage is only required for monitor + * interfaces. For the other types, the bss_info changed flow + * will handle quota settings. + */ + if (vif->type == NL80211_IFTYPE_MONITOR) { + mvmvif->monitor_active = true; + ret = iwl_mvm_update_quotas(mvm, vif); + if (ret) + goto out_remove_binding; + } + + /* Handle binding during CSA */ + if (vif->type == NL80211_IFTYPE_AP) { + iwl_mvm_update_quotas(mvm, vif); + iwl_mvm_mac_ctxt_changed(mvm, vif, false); + } + + goto out_unlock; + + out_remove_binding: + iwl_mvm_binding_remove_vif(mvm, vif); + iwl_mvm_power_update_mac(mvm); + out_unlock: + mutex_unlock(&mvm->mutex); + if (ret) + mvmvif->phy_ctxt = NULL; + return ret; +} + +static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_chanctx_conf *ctx) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + mutex_lock(&mvm->mutex); + + iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data); + + switch (vif->type) { + case NL80211_IFTYPE_ADHOC: + goto out_unlock; + case NL80211_IFTYPE_MONITOR: + mvmvif->monitor_active = false; + iwl_mvm_update_quotas(mvm, NULL); + break; + case NL80211_IFTYPE_AP: + /* This part is triggered only during CSA */ + if (!vif->csa_active || !mvmvif->ap_ibss_active) + goto out_unlock; + + mvmvif->ap_ibss_active = false; + iwl_mvm_update_quotas(mvm, NULL); + /*TODO: bt_coex notification here? */ + default: + break; + } + + iwl_mvm_binding_remove_vif(mvm, vif); + +out_unlock: + mvmvif->phy_ctxt = NULL; + iwl_mvm_power_update_mac(mvm); + mutex_unlock(&mvm->mutex); +} + +static int iwl_mvm_set_tim(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + bool set) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; + + if (!mvm_sta || !mvm_sta->vif) { + IWL_ERR(mvm, "Station is not associated to a vif\n"); + return -EINVAL; + } + + return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif); +} + +#ifdef CONFIG_NL80211_TESTMODE +static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = { + [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 }, + [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 }, + [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 }, +}; + +static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + void *data, int len) +{ + struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1]; + int err; + u32 noa_duration; + + err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy); + if (err) + return err; + + if (!tb[IWL_MVM_TM_ATTR_CMD]) + return -EINVAL; + + switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) { + case IWL_MVM_TM_CMD_SET_NOA: + if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p || + !vif->bss_conf.enable_beacon || + !tb[IWL_MVM_TM_ATTR_NOA_DURATION]) + return -EINVAL; + + noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]); + if (noa_duration >= vif->bss_conf.beacon_int) + return -EINVAL; + + mvm->noa_duration = noa_duration; + mvm->noa_vif = vif; + + return iwl_mvm_update_quotas(mvm, NULL); + case IWL_MVM_TM_CMD_SET_BEACON_FILTER: + /* must be associated client vif - ignore authorized */ + if (!vif || vif->type != NL80211_IFTYPE_STATION || + !vif->bss_conf.assoc || !vif->bss_conf.dtim_period || + !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]) + return -EINVAL; + + if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])) + return iwl_mvm_enable_beacon_filter(mvm, vif, 0); + return iwl_mvm_disable_beacon_filter(mvm, vif, 0); + } + + return -EOPNOTSUPP; +} + +static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + void *data, int len) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + int err; + + mutex_lock(&mvm->mutex); + err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len); + mutex_unlock(&mvm->mutex); + + return err; +} +#endif + +static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_chan_def *chandef) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + + mutex_lock(&mvm->mutex); + if (WARN(mvm->csa_vif && mvm->csa_vif->csa_active, + "Another CSA is already in progress")) + goto out_unlock; + + IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n", + chandef->center_freq1); + mvm->csa_vif = vif; + +out_unlock: + mutex_unlock(&mvm->mutex); +} + +static void iwl_mvm_mac_flush(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u32 queues, bool drop) +{ + struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); + struct iwl_mvm_vif *mvmvif; + struct iwl_mvm_sta *mvmsta; + + if (!vif || vif->type != NL80211_IFTYPE_STATION) + return; + + mutex_lock(&mvm->mutex); + mvmvif = iwl_mvm_vif_from_mac80211(vif); + mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id); + + if (WARN_ON_ONCE(!mvmsta)) + goto done; + + if (drop) { + if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true)) + IWL_ERR(mvm, "flush request fail\n"); + } else { + iwl_trans_wait_tx_queue_empty(mvm->trans, + mvmsta->tfd_queue_msk); + } +done: + mutex_unlock(&mvm->mutex); +} + +const struct ieee80211_ops iwl_mvm_hw_ops = { + .tx = iwl_mvm_mac_tx, + .ampdu_action = iwl_mvm_mac_ampdu_action, + .start = iwl_mvm_mac_start, + .restart_complete = iwl_mvm_mac_restart_complete, + .stop = iwl_mvm_mac_stop, + .add_interface = iwl_mvm_mac_add_interface, + .remove_interface = iwl_mvm_mac_remove_interface, + .config = iwl_mvm_mac_config, + .prepare_multicast = iwl_mvm_prepare_multicast, + .configure_filter = iwl_mvm_configure_filter, + .bss_info_changed = iwl_mvm_bss_info_changed, + .hw_scan = iwl_mvm_mac_hw_scan, + .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan, + .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove, + .sta_state = iwl_mvm_mac_sta_state, + .sta_notify = iwl_mvm_mac_sta_notify, + .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames, + .release_buffered_frames = iwl_mvm_mac_release_buffered_frames, + .set_rts_threshold = iwl_mvm_mac_set_rts_threshold, + .sta_rc_update = iwl_mvm_sta_rc_update, + .conf_tx = iwl_mvm_mac_conf_tx, + .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx, + .flush = iwl_mvm_mac_flush, + .sched_scan_start = iwl_mvm_mac_sched_scan_start, + .sched_scan_stop = iwl_mvm_mac_sched_scan_stop, + .set_key = iwl_mvm_mac_set_key, + .update_tkip_key = iwl_mvm_mac_update_tkip_key, + .remain_on_channel = iwl_mvm_roc, + .cancel_remain_on_channel = iwl_mvm_cancel_roc, + .add_chanctx = iwl_mvm_add_chanctx, + .remove_chanctx = iwl_mvm_remove_chanctx, + .change_chanctx = iwl_mvm_change_chanctx, + .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx, + .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx, + + .start_ap = iwl_mvm_start_ap_ibss, + .stop_ap = iwl_mvm_stop_ap_ibss, + .join_ibss = iwl_mvm_start_ap_ibss, + .leave_ibss = iwl_mvm_stop_ap_ibss, + + .set_tim = iwl_mvm_set_tim, + + .channel_switch_beacon = iwl_mvm_channel_switch_beacon, + + CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd) + +#ifdef CONFIG_PM_SLEEP + /* look at d3.c */ + .suspend = iwl_mvm_suspend, + .resume = iwl_mvm_resume, + .set_wakeup = iwl_mvm_set_wakeup, + .set_rekey_data = iwl_mvm_set_rekey_data, +#if IS_ENABLED(CONFIG_IPV6) + .ipv6_addr_change = iwl_mvm_ipv6_addr_change, +#endif + .set_default_unicast_key = iwl_mvm_set_default_unicast_key, +#endif +}; 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