diff options
Diffstat (limited to 'drivers/net/wireless/silabs/wfx/sta.c')
| -rw-r--r-- | drivers/net/wireless/silabs/wfx/sta.c | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/drivers/net/wireless/silabs/wfx/sta.c b/drivers/net/wireless/silabs/wfx/sta.c new file mode 100644 index 000000000..626dfb4b7 --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/sta.c @@ -0,0 +1,817 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Implementation of mac80211 API. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#include <linux/etherdevice.h> +#include <net/mac80211.h> + +#include "sta.h" +#include "wfx.h" +#include "fwio.h" +#include "bh.h" +#include "key.h" +#include "scan.h" +#include "debug.h" +#include "hif_tx.h" +#include "hif_tx_mib.h" + +#define HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES 2 + +u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates) +{ + int i; + u32 ret = 0; + /* The device only supports 2GHz */ + struct ieee80211_supported_band *sband = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]; + + for (i = 0; i < sband->n_bitrates; i++) { + if (rates & BIT(i)) { + if (i >= sband->n_bitrates) + dev_warn(wdev->dev, "unsupported basic rate\n"); + else + ret |= BIT(sband->bitrates[i].hw_value); + } + } + return ret; +} + +void wfx_cooling_timeout_work(struct work_struct *work) +{ + struct wfx_dev *wdev = container_of(to_delayed_work(work), struct wfx_dev, + cooling_timeout_work); + + wdev->chip_frozen = true; + wfx_tx_unlock(wdev); +} + +void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd) +{ + if (cmd == STA_NOTIFY_AWAKE) { + /* Device recover normal temperature */ + if (cancel_delayed_work(&wdev->cooling_timeout_work)) + wfx_tx_unlock(wdev); + } else { + /* Device is too hot */ + schedule_delayed_work(&wdev->cooling_timeout_work, 10 * HZ); + wfx_tx_lock(wdev); + } +} + +static void wfx_filter_beacon(struct wfx_vif *wvif, bool filter_beacon) +{ + static const struct wfx_hif_ie_table_entry filter_ies[] = { + { + .ie_id = WLAN_EID_VENDOR_SPECIFIC, + .has_changed = 1, + .no_longer = 1, + .has_appeared = 1, + .oui = { 0x50, 0x6F, 0x9A }, + }, { + .ie_id = WLAN_EID_HT_OPERATION, + .has_changed = 1, + .no_longer = 1, + .has_appeared = 1, + }, { + .ie_id = WLAN_EID_ERP_INFO, + .has_changed = 1, + .no_longer = 1, + .has_appeared = 1, + }, { + .ie_id = WLAN_EID_CHANNEL_SWITCH, + .has_changed = 1, + .no_longer = 1, + .has_appeared = 1, + } + }; + + if (!filter_beacon) { + wfx_hif_beacon_filter_control(wvif, 0, 1); + } else { + wfx_hif_set_beacon_filter_table(wvif, ARRAY_SIZE(filter_ies), filter_ies); + wfx_hif_beacon_filter_control(wvif, HIF_BEACON_FILTER_ENABLE, 0); + } +} + +void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, + unsigned int *total_flags, u64 unused) +{ + bool filter_bssid, filter_prbreq, filter_beacon; + struct ieee80211_vif *vif = NULL; + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = NULL; + + /* Notes: + * - Probe responses (FIF_BCN_PRBRESP_PROMISC) are never filtered + * - PS-Poll (FIF_PSPOLL) are never filtered + * - RTS, CTS and Ack (FIF_CONTROL) are always filtered + * - Broken frames (FIF_FCSFAIL and FIF_PLCPFAIL) are always filtered + * - Firmware does (yet) allow to forward unicast traffic sent to other stations (aka. + * promiscuous mode) + */ + *total_flags &= FIF_BCN_PRBRESP_PROMISC | FIF_ALLMULTI | FIF_OTHER_BSS | + FIF_PROBE_REQ | FIF_PSPOLL; + + mutex_lock(&wdev->conf_mutex); + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { + mutex_lock(&wvif->scan_lock); + + /* Note: FIF_BCN_PRBRESP_PROMISC covers probe response and + * beacons from other BSS + */ + if (*total_flags & FIF_BCN_PRBRESP_PROMISC) + filter_beacon = false; + else + filter_beacon = true; + wfx_filter_beacon(wvif, filter_beacon); + + if (*total_flags & FIF_OTHER_BSS) + filter_bssid = false; + else + filter_bssid = true; + + vif = wvif_to_vif(wvif); + /* In AP mode, chip can reply to probe request itself */ + if (*total_flags & FIF_PROBE_REQ && vif->type == NL80211_IFTYPE_AP) { + dev_dbg(wdev->dev, "do not forward probe request in AP mode\n"); + *total_flags &= ~FIF_PROBE_REQ; + } + + if (*total_flags & FIF_PROBE_REQ) + filter_prbreq = false; + else + filter_prbreq = true; + wfx_hif_set_rx_filter(wvif, filter_bssid, filter_prbreq); + + mutex_unlock(&wvif->scan_lock); + } + mutex_unlock(&wdev->conf_mutex); +} + +static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps) +{ + struct ieee80211_channel *chan0 = NULL, *chan1 = NULL; + struct ieee80211_conf *conf = &wvif->wdev->hw->conf; + struct ieee80211_vif *vif = wvif_to_vif(wvif); + + WARN(!vif->cfg.assoc && enable_ps, + "enable_ps is reliable only if associated"); + if (wdev_to_wvif(wvif->wdev, 0)) { + struct wfx_vif *wvif_ch0 = wdev_to_wvif(wvif->wdev, 0); + struct ieee80211_vif *vif_ch0 = wvif_to_vif(wvif_ch0); + + chan0 = vif_ch0->bss_conf.chandef.chan; + } + if (wdev_to_wvif(wvif->wdev, 1)) { + struct wfx_vif *wvif_ch1 = wdev_to_wvif(wvif->wdev, 1); + struct ieee80211_vif *vif_ch1 = wvif_to_vif(wvif_ch1); + + chan1 = vif_ch1->bss_conf.chandef.chan; + } + if (chan0 && chan1 && vif->type != NL80211_IFTYPE_AP) { + if (chan0->hw_value == chan1->hw_value) { + /* It is useless to enable PS if channels are the same. */ + if (enable_ps) + *enable_ps = false; + if (vif->cfg.assoc && vif->cfg.ps) + dev_info(wvif->wdev->dev, "ignoring requested PS mode"); + return -1; + } + /* It is necessary to enable PS if channels are different. */ + if (enable_ps) + *enable_ps = true; + if (wfx_api_older_than(wvif->wdev, 3, 2)) + return 0; + else + return 30; + } + if (enable_ps) + *enable_ps = vif->cfg.ps; + if (vif->cfg.assoc && vif->cfg.ps) + return conf->dynamic_ps_timeout; + else + return -1; +} + +int wfx_update_pm(struct wfx_vif *wvif) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + int ps_timeout; + bool ps; + + if (!vif->cfg.assoc) + return 0; + ps_timeout = wfx_get_ps_timeout(wvif, &ps); + if (!ps) + ps_timeout = 0; + WARN_ON(ps_timeout < 0); + if (wvif->uapsd_mask) + ps_timeout = 0; + + if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete, TU_TO_JIFFIES(512))) + dev_warn(wvif->wdev->dev, "timeout while waiting of set_pm_mode_complete\n"); + return wfx_hif_set_pm(wvif, ps, ps_timeout); +} + +int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + unsigned int link_id, u16 queue, + const struct ieee80211_tx_queue_params *params) +{ + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + int old_uapsd = wvif->uapsd_mask; + + WARN_ON(queue >= hw->queues); + + mutex_lock(&wdev->conf_mutex); + assign_bit(queue, &wvif->uapsd_mask, params->uapsd); + wfx_hif_set_edca_queue_params(wvif, queue, params); + if (vif->type == NL80211_IFTYPE_STATION && + old_uapsd != wvif->uapsd_mask) { + wfx_hif_set_uapsd_info(wvif, wvif->uapsd_mask); + wfx_update_pm(wvif); + } + mutex_unlock(&wdev->conf_mutex); + return 0; +} + +int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value) +{ + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = NULL; + + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) + wfx_hif_rts_threshold(wvif, value); + return 0; +} + +void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi) +{ + /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 + * RSSI = RCPI / 2 - 110 + */ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + int rcpi_rssi; + int cqm_evt; + + rcpi_rssi = raw_rcpi_rssi / 2 - 110; + if (rcpi_rssi <= vif->bss_conf.cqm_rssi_thold) + cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW; + else + cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; + ieee80211_cqm_rssi_notify(vif, cqm_evt, rcpi_rssi, GFP_KERNEL); +} + +static void wfx_beacon_loss_work(struct work_struct *work) +{ + struct wfx_vif *wvif = container_of(to_delayed_work(work), struct wfx_vif, + beacon_loss_work); + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; + + ieee80211_beacon_loss(vif); + schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(bss_conf->beacon_int)); +} + +void wfx_set_default_unicast_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int idx) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + wfx_hif_wep_default_key_id(wvif, idx); +} + +void wfx_reset(struct wfx_vif *wvif) +{ + struct wfx_dev *wdev = wvif->wdev; + + wfx_tx_lock_flush(wdev); + wfx_hif_reset(wvif, false); + wfx_tx_policy_init(wvif); + if (wvif_count(wdev) <= 1) + wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); + wfx_tx_unlock(wdev); + wvif->join_in_progress = false; + cancel_delayed_work_sync(&wvif->beacon_loss_work); + wvif = NULL; + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) + wfx_update_pm(wvif); +} + +int wfx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv; + + sta_priv->vif_id = wvif->id; + + if (vif->type == NL80211_IFTYPE_STATION) + wfx_hif_set_mfp(wvif, sta->mfp, sta->mfp); + + /* In station mode, the firmware interprets new link-id as a TDLS peer */ + if (vif->type == NL80211_IFTYPE_STATION && !sta->tdls) + return 0; + sta_priv->link_id = ffz(wvif->link_id_map); + wvif->link_id_map |= BIT(sta_priv->link_id); + WARN_ON(!sta_priv->link_id); + WARN_ON(sta_priv->link_id >= HIF_LINK_ID_MAX); + wfx_hif_map_link(wvif, false, sta->addr, sta_priv->link_id, sta->mfp); + + return 0; +} + +int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv; + + /* See note in wfx_sta_add() */ + if (!sta_priv->link_id) + return 0; + /* FIXME add a mutex? */ + wfx_hif_map_link(wvif, true, sta->addr, sta_priv->link_id, false); + wvif->link_id_map &= ~BIT(sta_priv->link_id); + return 0; +} + +static int wfx_upload_ap_templates(struct wfx_vif *wvif) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct sk_buff *skb; + + skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0); + if (!skb) + return -ENOMEM; + wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN, API_RATE_INDEX_B_1MBPS); + dev_kfree_skb(skb); + + skb = ieee80211_proberesp_get(wvif->wdev->hw, vif); + if (!skb) + return -ENOMEM; + wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES, API_RATE_INDEX_B_1MBPS); + dev_kfree_skb(skb); + return 0; +} + +static void wfx_set_mfp_ap(struct wfx_vif *wvif) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0); + const int ieoffset = offsetof(struct ieee80211_mgmt, u.beacon.variable); + const u16 *ptr = (u16 *)cfg80211_find_ie(WLAN_EID_RSN, skb->data + ieoffset, + skb->len - ieoffset); + const int pairwise_cipher_suite_count_offset = 8 / sizeof(u16); + const int pairwise_cipher_suite_size = 4 / sizeof(u16); + const int akm_suite_size = 4 / sizeof(u16); + + if (ptr) { + ptr += pairwise_cipher_suite_count_offset; + if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) + return; + ptr += 1 + pairwise_cipher_suite_size * *ptr; + if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) + return; + ptr += 1 + akm_suite_size * *ptr; + if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb))) + return; + wfx_hif_set_mfp(wvif, *ptr & BIT(7), *ptr & BIT(6)); + } +} + +int wfx_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *link_conf) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + struct wfx_dev *wdev = wvif->wdev; + int ret; + + wvif = NULL; + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) + wfx_update_pm(wvif); + wvif = (struct wfx_vif *)vif->drv_priv; + wfx_upload_ap_templates(wvif); + ret = wfx_hif_start(wvif, &vif->bss_conf, wvif->channel); + if (ret > 0) + return -EIO; + wfx_set_mfp_ap(wvif); + return ret; +} + +void wfx_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *link_conf) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + wfx_reset(wvif); +} + +static void wfx_join(struct wfx_vif *wvif) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct ieee80211_bss_conf *conf = &vif->bss_conf; + struct cfg80211_bss *bss = NULL; + u8 ssid[IEEE80211_MAX_SSID_LEN]; + const u8 *ssid_ie = NULL; + int ssid_len = 0; + int ret; + + wfx_tx_lock_flush(wvif->wdev); + + bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel, conf->bssid, NULL, 0, + IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); + if (!bss && !vif->cfg.ibss_joined) { + wfx_tx_unlock(wvif->wdev); + return; + } + + rcu_read_lock(); /* protect ssid_ie */ + if (bss) + ssid_ie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); + if (ssid_ie) { + ssid_len = ssid_ie[1]; + if (ssid_len > IEEE80211_MAX_SSID_LEN) + ssid_len = IEEE80211_MAX_SSID_LEN; + memcpy(ssid, &ssid_ie[2], ssid_len); + } + rcu_read_unlock(); + + cfg80211_put_bss(wvif->wdev->hw->wiphy, bss); + + wvif->join_in_progress = true; + ret = wfx_hif_join(wvif, conf, wvif->channel, ssid, ssid_len); + if (ret) { + ieee80211_connection_loss(vif); + wfx_reset(wvif); + } else { + /* Due to beacon filtering it is possible that the AP's beacon is not known for the + * mac80211 stack. Disable filtering temporary to make sure the stack receives at + * least one + */ + wfx_filter_beacon(wvif, false); + } + wfx_tx_unlock(wvif->wdev); +} + +static void wfx_join_finalize(struct wfx_vif *wvif, struct ieee80211_bss_conf *info) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct ieee80211_sta *sta = NULL; + int ampdu_density = 0; + bool greenfield = false; + + rcu_read_lock(); /* protect sta */ + if (info->bssid && !vif->cfg.ibss_joined) + sta = ieee80211_find_sta(vif, info->bssid); + if (sta && sta->deflink.ht_cap.ht_supported) + ampdu_density = sta->deflink.ht_cap.ampdu_density; + if (sta && sta->deflink.ht_cap.ht_supported && + !(info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)) + greenfield = !!(sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD); + rcu_read_unlock(); + + wvif->join_in_progress = false; + wfx_hif_set_association_mode(wvif, ampdu_density, greenfield, info->use_short_preamble); + wfx_hif_keep_alive_period(wvif, 0); + /* beacon_loss_count is defined to 7 in net/mac80211/mlme.c. Let's use the same value. */ + wfx_hif_set_bss_params(wvif, vif->cfg.aid, 7); + wfx_hif_set_beacon_wakeup_period(wvif, 1, 1); + wfx_update_pm(wvif); +} + +int wfx_join_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + wfx_upload_ap_templates(wvif); + wfx_join(wvif); + return 0; +} + +void wfx_leave_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + wfx_reset(wvif); +} + +static void wfx_enable_beacon(struct wfx_vif *wvif, bool enable) +{ + /* Driver has Content After DTIM Beacon in queue. Driver is waiting for a signal from the + * firmware. Since we are going to stop to send beacons, this signal will never happens. See + * also wfx_suspend_resume_mc() + */ + if (!enable && wfx_tx_queues_has_cab(wvif)) { + wvif->after_dtim_tx_allowed = true; + wfx_bh_request_tx(wvif->wdev); + } + wfx_hif_beacon_transmit(wvif, enable); +} + +void wfx_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *info, u64 changed) +{ + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + int i; + + mutex_lock(&wdev->conf_mutex); + + if (changed & BSS_CHANGED_BASIC_RATES || + changed & BSS_CHANGED_BEACON_INT || + changed & BSS_CHANGED_BSSID) { + if (vif->type == NL80211_IFTYPE_STATION) + wfx_join(wvif); + } + + if (changed & BSS_CHANGED_ASSOC) { + if (vif->cfg.assoc || vif->cfg.ibss_joined) + wfx_join_finalize(wvif, info); + else if (!vif->cfg.assoc && vif->type == NL80211_IFTYPE_STATION) + wfx_reset(wvif); + else + dev_warn(wdev->dev, "misunderstood change: ASSOC\n"); + } + + if (changed & BSS_CHANGED_BEACON_INFO) { + if (vif->type != NL80211_IFTYPE_STATION) + dev_warn(wdev->dev, "misunderstood change: BEACON_INFO\n"); + wfx_hif_set_beacon_wakeup_period(wvif, info->dtim_period, info->dtim_period); + /* We temporary forwarded beacon for join process. It is now no more necessary. */ + wfx_filter_beacon(wvif, true); + } + + if (changed & BSS_CHANGED_ARP_FILTER) { + for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) { + __be32 *arp_addr = &vif->cfg.arp_addr_list[i]; + + if (vif->cfg.arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES) + arp_addr = NULL; + if (i >= vif->cfg.arp_addr_cnt) + arp_addr = NULL; + wfx_hif_set_arp_ipv4_filter(wvif, i, arp_addr); + } + } + + if (changed & BSS_CHANGED_AP_PROBE_RESP || changed & BSS_CHANGED_BEACON) + wfx_upload_ap_templates(wvif); + + if (changed & BSS_CHANGED_BEACON_ENABLED) + wfx_enable_beacon(wvif, info->enable_beacon); + + if (changed & BSS_CHANGED_KEEP_ALIVE) + wfx_hif_keep_alive_period(wvif, + info->max_idle_period * USEC_PER_TU / USEC_PER_MSEC); + + if (changed & BSS_CHANGED_ERP_CTS_PROT) + wfx_hif_erp_use_protection(wvif, info->use_cts_prot); + + if (changed & BSS_CHANGED_ERP_SLOT) + wfx_hif_slot_time(wvif, info->use_short_slot ? 9 : 20); + + if (changed & BSS_CHANGED_CQM) + wfx_hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold, info->cqm_rssi_hyst); + + if (changed & BSS_CHANGED_TXPOWER) + wfx_hif_set_output_power(wvif, info->txpower); + + if (changed & BSS_CHANGED_PS) + wfx_update_pm(wvif); + + mutex_unlock(&wdev->conf_mutex); +} + +static int wfx_update_tim(struct wfx_vif *wvif) +{ + struct ieee80211_vif *vif = wvif_to_vif(wvif); + struct sk_buff *skb; + u16 tim_offset, tim_length; + u8 *tim_ptr; + + skb = ieee80211_beacon_get_tim(wvif->wdev->hw, vif, &tim_offset, + &tim_length, 0); + if (!skb) + return -ENOENT; + tim_ptr = skb->data + tim_offset; + + if (tim_offset && tim_length >= 6) { + /* Firmware handles DTIM counter internally */ + tim_ptr[2] = 0; + + /* Set/reset aid0 bit */ + if (wfx_tx_queues_has_cab(wvif)) + tim_ptr[4] |= 1; + else + tim_ptr[4] &= ~1; + } + + wfx_hif_update_ie_beacon(wvif, tim_ptr, tim_length); + dev_kfree_skb(skb); + + return 0; +} + +static void wfx_update_tim_work(struct work_struct *work) +{ + struct wfx_vif *wvif = container_of(work, struct wfx_vif, update_tim_work); + + wfx_update_tim(wvif); +} + +int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) +{ + struct wfx_dev *wdev = hw->priv; + struct wfx_sta_priv *sta_dev = (struct wfx_sta_priv *)&sta->drv_priv; + struct wfx_vif *wvif = wdev_to_wvif(wdev, sta_dev->vif_id); + + if (!wvif) { + dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__); + return -EIO; + } + schedule_work(&wvif->update_tim_work); + return 0; +} + +void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd) +{ + struct wfx_vif *wvif_it; + + if (notify_cmd != STA_NOTIFY_AWAKE) + return; + + /* Device won't be able to honor CAB if a scan is in progress on any interface. Prefer to + * skip this DTIM and wait for the next one. + */ + wvif_it = NULL; + while ((wvif_it = wvif_iterate(wvif->wdev, wvif_it)) != NULL) + if (mutex_is_locked(&wvif_it->scan_lock)) + return; + + if (!wfx_tx_queues_has_cab(wvif) || wvif->after_dtim_tx_allowed) + dev_warn(wvif->wdev->dev, "incorrect sequence (%d CAB in queue)", + wfx_tx_queues_has_cab(wvif)); + wvif->after_dtim_tx_allowed = true; + wfx_bh_request_tx(wvif->wdev); +} + +int wfx_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_ampdu_params *params) +{ + /* Aggregation is implemented fully in firmware */ + switch (params->action) { + case IEEE80211_AMPDU_RX_START: + case IEEE80211_AMPDU_RX_STOP: + /* Just acknowledge it to enable frame re-ordering */ + return 0; + default: + /* Leave the firmware doing its business for tx aggregation */ + return -EOPNOTSUPP; + } +} + +int wfx_add_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf) +{ + return 0; +} + +void wfx_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf) +{ +} + +void wfx_change_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, u32 changed) +{ +} + +int wfx_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *link_conf, + struct ieee80211_chanctx_conf *conf) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + struct ieee80211_channel *ch = conf->def.chan; + + WARN(wvif->channel, "channel overwrite"); + wvif->channel = ch; + + return 0; +} + +void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *link_conf, + struct ieee80211_chanctx_conf *conf) +{ + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + struct ieee80211_channel *ch = conf->def.chan; + + WARN(wvif->channel != ch, "channel mismatch"); + wvif->channel = NULL; +} + +int wfx_config(struct ieee80211_hw *hw, u32 changed) +{ + return 0; +} + +int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + int i; + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | + IEEE80211_VIF_SUPPORTS_UAPSD | + IEEE80211_VIF_SUPPORTS_CQM_RSSI; + + mutex_lock(&wdev->conf_mutex); + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_ADHOC: + case NL80211_IFTYPE_AP: + break; + default: + mutex_unlock(&wdev->conf_mutex); + return -EOPNOTSUPP; + } + + wvif->wdev = wdev; + + wvif->link_id_map = 1; /* link-id 0 is reserved for multicast */ + INIT_WORK(&wvif->update_tim_work, wfx_update_tim_work); + INIT_DELAYED_WORK(&wvif->beacon_loss_work, wfx_beacon_loss_work); + + init_completion(&wvif->set_pm_mode_complete); + complete(&wvif->set_pm_mode_complete); + INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work); + + mutex_init(&wvif->scan_lock); + init_completion(&wvif->scan_complete); + INIT_WORK(&wvif->scan_work, wfx_hw_scan_work); + + wfx_tx_queues_init(wvif); + wfx_tx_policy_init(wvif); + + for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) { + if (!wdev->vif[i]) { + wdev->vif[i] = vif; + wvif->id = i; + break; + } + } + WARN(i == ARRAY_SIZE(wdev->vif), "try to instantiate more vif than supported"); + + wfx_hif_set_macaddr(wvif, vif->addr); + + mutex_unlock(&wdev->conf_mutex); + + wvif = NULL; + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { + /* Combo mode does not support Block Acks. We can re-enable them */ + if (wvif_count(wdev) == 1) + wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); + else + wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00); + } + return 0; +} + +void wfx_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) +{ + struct wfx_dev *wdev = hw->priv; + struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv; + + wait_for_completion_timeout(&wvif->set_pm_mode_complete, msecs_to_jiffies(300)); + wfx_tx_queues_check_empty(wvif); + + mutex_lock(&wdev->conf_mutex); + WARN(wvif->link_id_map != 1, "corrupted state"); + + wfx_hif_reset(wvif, false); + wfx_hif_set_macaddr(wvif, NULL); + wfx_tx_policy_init(wvif); + + cancel_delayed_work_sync(&wvif->beacon_loss_work); + wdev->vif[wvif->id] = NULL; + + mutex_unlock(&wdev->conf_mutex); + + wvif = NULL; + while ((wvif = wvif_iterate(wdev, wvif)) != NULL) { + /* Combo mode does not support Block Acks. We can re-enable them */ + if (wvif_count(wdev) == 1) + wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF); + else + wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00); + } +} + +int wfx_start(struct ieee80211_hw *hw) +{ + return 0; +} + +void wfx_stop(struct ieee80211_hw *hw) +{ + struct wfx_dev *wdev = hw->priv; + + WARN_ON(!skb_queue_empty_lockless(&wdev->tx_pending)); +} |