diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00dev.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00dev.c | 883 |
1 files changed, 714 insertions, 169 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c index 06c43ca39bf..4fa43a2eeb7 100644 --- a/drivers/net/wireless/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/rt2x00/rt2x00dev.c @@ -1,5 +1,6 @@ /* - Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> + Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> + Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> <http://rt2x00.serialmonkey.com> This program is free software; you can redistribute it and/or modify @@ -13,9 +14,7 @@ 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., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* @@ -25,11 +24,29 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/slab.h> +#include <linux/log2.h> #include "rt2x00.h" #include "rt2x00lib.h" /* + * Utility functions. + */ +u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) +{ + /* + * When in STA mode, bssidx is always 0 otherwise local_address[5] + * contains the bss number, see BSS_ID_MASK comments for details. + */ + if (rt2x00dev->intf_sta_count) + return 0; + return vif->addr[5] & (rt2x00dev->ops->max_ap_intf - 1); +} +EXPORT_SYMBOL_GPL(rt2x00lib_get_bssidx); + +/* * Radio control handlers. */ int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) @@ -64,14 +81,18 @@ int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags); /* - * Enable RX. + * Enable queues. */ - rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); + rt2x00queue_start_queues(rt2x00dev); + rt2x00link_start_tuner(rt2x00dev); + rt2x00link_start_agc(rt2x00dev); + if (rt2x00_has_cap_vco_recalibration(rt2x00dev)) + rt2x00link_start_vcocal(rt2x00dev); /* - * Start the TX queues. + * Start watchdog monitoring. */ - ieee80211_wake_queues(rt2x00dev->hw); + rt2x00link_start_watchdog(rt2x00dev); return 0; } @@ -82,15 +103,19 @@ void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) return; /* - * Stop the TX queues in mac80211. + * Stop watchdog monitoring. */ - ieee80211_stop_queues(rt2x00dev->hw); - rt2x00queue_stop_queues(rt2x00dev); + rt2x00link_stop_watchdog(rt2x00dev); /* - * Disable RX. + * Stop all queues */ - rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); + rt2x00link_stop_agc(rt2x00dev); + if (rt2x00_has_cap_vco_recalibration(rt2x00dev)) + rt2x00link_stop_vcocal(rt2x00dev); + rt2x00link_stop_tuner(rt2x00dev); + rt2x00queue_stop_queues(rt2x00dev); + rt2x00queue_flush_queues(rt2x00dev, true); /* * Disable radio. @@ -101,41 +126,11 @@ void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) rt2x00leds_led_radio(rt2x00dev, false); } -void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) -{ - /* - * When we are disabling the RX, we should also stop the link tuner. - */ - if (state == STATE_RADIO_RX_OFF) - rt2x00link_stop_tuner(rt2x00dev); - - rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); - - /* - * When we are enabling the RX, we should also start the link tuner. - */ - if (state == STATE_RADIO_RX_ON) - rt2x00link_start_tuner(rt2x00dev); -} - static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct rt2x00_dev *rt2x00dev = data; struct rt2x00_intf *intf = vif_to_intf(vif); - int delayed_flags; - - /* - * Copy all data we need during this action under the protection - * of a spinlock. Otherwise race conditions might occur which results - * into an invalid configuration. - */ - spin_lock(&intf->lock); - - delayed_flags = intf->delayed_flags; - intf->delayed_flags = 0; - - spin_unlock(&intf->lock); /* * It is possible the radio was disabled while the work had been @@ -146,8 +141,8 @@ static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return; - if (delayed_flags & DELAYED_UPDATE_BEACON) - rt2x00queue_update_beacon(rt2x00dev, vif, true); + if (test_and_clear_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags)) + rt2x00queue_update_beacon(rt2x00dev, vif); } static void rt2x00lib_intf_scheduled(struct work_struct *work) @@ -160,17 +155,54 @@ static void rt2x00lib_intf_scheduled(struct work_struct *work) * requested configurations. */ ieee80211_iterate_active_interfaces(rt2x00dev->hw, + IEEE80211_IFACE_ITER_RESUME_ALL, rt2x00lib_intf_scheduled_iter, rt2x00dev); } +static void rt2x00lib_autowakeup(struct work_struct *work) +{ + struct rt2x00_dev *rt2x00dev = + container_of(work, struct rt2x00_dev, autowakeup_work.work); + + if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) + return; + + if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE)) + rt2x00_err(rt2x00dev, "Device failed to wakeup\n"); + clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags); +} + /* * Interrupt context handlers. */ -static void rt2x00lib_beacondone_iter(void *data, u8 *mac, - struct ieee80211_vif *vif) +static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac, + struct ieee80211_vif *vif) { - struct rt2x00_intf *intf = vif_to_intf(vif); + struct ieee80211_tx_control control = {}; + struct rt2x00_dev *rt2x00dev = data; + struct sk_buff *skb; + + /* + * Only AP mode interfaces do broad- and multicast buffering + */ + if (vif->type != NL80211_IFTYPE_AP) + return; + + /* + * Send out buffered broad- and multicast frames + */ + skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); + while (skb) { + rt2x00mac_tx(rt2x00dev->hw, &control, skb); + skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); + } +} + +static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct rt2x00_dev *rt2x00dev = data; if (vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_ADHOC && @@ -178,9 +210,13 @@ static void rt2x00lib_beacondone_iter(void *data, u8 *mac, vif->type != NL80211_IFTYPE_WDS) return; - spin_lock(&intf->lock); - intf->delayed_flags |= DELAYED_UPDATE_BEACON; - spin_unlock(&intf->lock); + /* + * Update the beacon without locking. This is safe on PCI devices + * as they only update the beacon periodically here. This should + * never be called for USB devices. + */ + WARN_ON(rt2x00_is_usb(rt2x00dev)); + rt2x00queue_update_beacon_locked(rt2x00dev, vif); } void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) @@ -188,45 +224,140 @@ void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return; - ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, - rt2x00lib_beacondone_iter, - rt2x00dev); + /* send buffered bc/mc frames out for every bssid */ + ieee80211_iterate_active_interfaces_atomic( + rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + rt2x00lib_bc_buffer_iter, rt2x00dev); + /* + * Devices with pre tbtt interrupt don't need to update the beacon + * here as they will fetch the next beacon directly prior to + * transmission. + */ + if (rt2x00_has_cap_pre_tbtt_interrupt(rt2x00dev)) + return; - ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); + /* fetch next beacon */ + ieee80211_iterate_active_interfaces_atomic( + rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + rt2x00lib_beaconupdate_iter, rt2x00dev); } EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); +void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev) +{ + if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) + return; + + /* fetch next beacon */ + ieee80211_iterate_active_interfaces_atomic( + rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + rt2x00lib_beaconupdate_iter, rt2x00dev); +} +EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt); + +void rt2x00lib_dmastart(struct queue_entry *entry) +{ + set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); + rt2x00queue_index_inc(entry, Q_INDEX); +} +EXPORT_SYMBOL_GPL(rt2x00lib_dmastart); + +void rt2x00lib_dmadone(struct queue_entry *entry) +{ + set_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags); + clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); + rt2x00queue_index_inc(entry, Q_INDEX_DMA_DONE); +} +EXPORT_SYMBOL_GPL(rt2x00lib_dmadone); + +static inline int rt2x00lib_txdone_bar_status(struct queue_entry *entry) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct ieee80211_bar *bar = (void *) entry->skb->data; + struct rt2x00_bar_list_entry *bar_entry; + int ret; + + if (likely(!ieee80211_is_back_req(bar->frame_control))) + return 0; + + /* + * Unlike all other frames, the status report for BARs does + * not directly come from the hardware as it is incapable of + * matching a BA to a previously send BAR. The hardware will + * report all BARs as if they weren't acked at all. + * + * Instead the RX-path will scan for incoming BAs and set the + * block_acked flag if it sees one that was likely caused by + * a BAR from us. + * + * Remove remaining BARs here and return their status for + * TX done processing. + */ + ret = 0; + rcu_read_lock(); + list_for_each_entry_rcu(bar_entry, &rt2x00dev->bar_list, list) { + if (bar_entry->entry != entry) + continue; + + spin_lock_bh(&rt2x00dev->bar_list_lock); + /* Return whether this BAR was blockacked or not */ + ret = bar_entry->block_acked; + /* Remove the BAR from our checklist */ + list_del_rcu(&bar_entry->list); + spin_unlock_bh(&rt2x00dev->bar_list_lock); + kfree_rcu(bar_entry, head); + + break; + } + rcu_read_unlock(); + + return ret; +} + void rt2x00lib_txdone(struct queue_entry *entry, struct txdone_entry_desc *txdesc) { struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); - enum data_queue_qid qid = skb_get_queue_mapping(entry->skb); - unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb); + unsigned int header_length, i; u8 rate_idx, rate_flags, retry_rates; u8 skbdesc_flags = skbdesc->flags; - unsigned int i; bool success; /* * Unmap the skb. */ - rt2x00queue_unmap_skb(rt2x00dev, entry->skb); + rt2x00queue_unmap_skb(entry); + + /* + * Remove the extra tx headroom from the skb. + */ + skb_pull(entry->skb, rt2x00dev->extra_tx_headroom); + + /* + * Signal that the TX descriptor is no longer in the skb. + */ + skbdesc->flags &= ~SKBDESC_DESC_IN_SKB; + + /* + * Determine the length of 802.11 header. + */ + header_length = ieee80211_get_hdrlen_from_skb(entry->skb); /* * Remove L2 padding which was added during */ - if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags)) + if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) rt2x00queue_remove_l2pad(entry->skb, header_length); /* * If the IV/EIV data was stripped from the frame before it was * passed to the hardware, we should now reinsert it again because - * mac80211 will expect the the same data to be present it the + * mac80211 will expect the same data to be present it the * frame as it was passed to us. */ - if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) + if (rt2x00_has_cap_hw_crypto(rt2x00dev)) rt2x00crypto_tx_insert_iv(entry->skb, header_length); /* @@ -236,12 +367,14 @@ void rt2x00lib_txdone(struct queue_entry *entry, rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb); /* - * Determine if the frame has been successfully transmitted. + * Determine if the frame has been successfully transmitted and + * remove BARs from our check list while checking for their + * TX status. */ success = + rt2x00lib_txdone_bar_status(entry) || test_bit(TXDONE_SUCCESS, &txdesc->flags) || - test_bit(TXDONE_UNKNOWN, &txdesc->flags) || - test_bit(TXDONE_FALLBACK, &txdesc->flags); + test_bit(TXDONE_UNKNOWN, &txdesc->flags); /* * Update TX statistics. @@ -263,11 +396,22 @@ void rt2x00lib_txdone(struct queue_entry *entry, /* * Frame was send with retries, hardware tried * different rates to send out the frame, at each - * retry it lowered the rate 1 step. + * retry it lowered the rate 1 step except when the + * lowest rate was used. */ for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) { tx_info->status.rates[i].idx = rate_idx - i; tx_info->status.rates[i].flags = rate_flags; + + if (rate_idx - i == 0) { + /* + * The lowest rate (index 0) was used until the + * number of max retries was reached. + */ + tx_info->status.rates[i].count = retry_rates - i; + i++; + break; + } tx_info->status.rates[i].count = 1; } if (i < (IEEE80211_TX_MAX_RATES - 1)) @@ -280,6 +424,25 @@ void rt2x00lib_txdone(struct queue_entry *entry, rt2x00dev->low_level_stats.dot11ACKFailureCount++; } + /* + * Every single frame has it's own tx status, hence report + * every frame as ampdu of size 1. + * + * TODO: if we can find out how many frames were aggregated + * by the hw we could provide the real ampdu_len to mac80211 + * which would allow the rc algorithm to better decide on + * which rates are suitable. + */ + if (test_bit(TXDONE_AMPDU, &txdesc->flags) || + tx_info->flags & IEEE80211_TX_CTL_AMPDU) { + tx_info->flags |= IEEE80211_TX_STAT_AMPDU; + tx_info->status.ampdu_len = 1; + tx_info->status.ampdu_ack_len = success ? 1 : 0; + + if (!success) + tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; + } + if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) { if (success) rt2x00dev->low_level_stats.dot11RTSSuccessCount++; @@ -293,10 +456,13 @@ void rt2x00lib_txdone(struct queue_entry *entry, * through a mac80211 library call (RTS/CTS) then we should not * send the status report back. */ - if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) - ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb); - else - dev_kfree_skb_irq(entry->skb); + if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) { + if (test_bit(REQUIRE_TASKLET_CONTEXT, &rt2x00dev->cap_flags)) + ieee80211_tx_status(rt2x00dev->hw, entry->skb); + else + ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb); + } else + dev_kfree_skb_any(entry->skb); /* * Make this entry available for reuse. @@ -306,78 +472,239 @@ void rt2x00lib_txdone(struct queue_entry *entry, rt2x00dev->ops->lib->clear_entry(entry); - clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); - rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE); + rt2x00queue_index_inc(entry, Q_INDEX_DONE); /* * If the data queue was below the threshold before the txdone * handler we must make sure the packet queue in the mac80211 stack - * is reenabled when the txdone handler has finished. + * is reenabled when the txdone handler has finished. This has to be + * serialized with rt2x00mac_tx(), otherwise we can wake up queue + * before it was stopped. */ + spin_lock_bh(&entry->queue->tx_lock); if (!rt2x00queue_threshold(entry->queue)) - ieee80211_wake_queue(rt2x00dev->hw, qid); + rt2x00queue_unpause_queue(entry->queue); + spin_unlock_bh(&entry->queue->tx_lock); } EXPORT_SYMBOL_GPL(rt2x00lib_txdone); -static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev, - struct rxdone_entry_desc *rxdesc) +void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status) { - struct ieee80211_supported_band *sband; - const struct rt2x00_rate *rate; - unsigned int i; - int signal; - int type; + struct txdone_entry_desc txdesc; + + txdesc.flags = 0; + __set_bit(status, &txdesc.flags); + txdesc.retry = 0; + + rt2x00lib_txdone(entry, &txdesc); +} +EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo); + +static u8 *rt2x00lib_find_ie(u8 *data, unsigned int len, u8 ie) +{ + struct ieee80211_mgmt *mgmt = (void *)data; + u8 *pos, *end; + + pos = (u8 *)mgmt->u.beacon.variable; + end = data + len; + while (pos < end) { + if (pos + 2 + pos[1] > end) + return NULL; + + if (pos[0] == ie) + return pos; + + pos += 2 + pos[1]; + } + + return NULL; +} + +static void rt2x00lib_sleep(struct work_struct *work) +{ + struct rt2x00_dev *rt2x00dev = + container_of(work, struct rt2x00_dev, sleep_work); + + if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) + return; /* - * For non-HT rates the MCS value needs to contain the - * actually used rate modulation (CCK or OFDM). + * Check again is powersaving is enabled, to prevent races from delayed + * work execution. */ - if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS) - signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal); - else - signal = rxdesc->signal; + if (!test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags)) + rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, + IEEE80211_CONF_CHANGE_PS); +} + +static void rt2x00lib_rxdone_check_ba(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, + struct rxdone_entry_desc *rxdesc) +{ + struct rt2x00_bar_list_entry *entry; + struct ieee80211_bar *ba = (void *)skb->data; + + if (likely(!ieee80211_is_back(ba->frame_control))) + return; + + if (rxdesc->size < sizeof(*ba) + FCS_LEN) + return; + + rcu_read_lock(); + list_for_each_entry_rcu(entry, &rt2x00dev->bar_list, list) { + + if (ba->start_seq_num != entry->start_seq_num) + continue; + +#define TID_CHECK(a, b) ( \ + ((a) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK)) == \ + ((b) & cpu_to_le16(IEEE80211_BAR_CTRL_TID_INFO_MASK))) \ + + if (!TID_CHECK(ba->control, entry->control)) + continue; - type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK); +#undef TID_CHECK + + if (!ether_addr_equal_64bits(ba->ra, entry->ta)) + continue; + + if (!ether_addr_equal_64bits(ba->ta, entry->ra)) + continue; + + /* Mark BAR since we received the according BA */ + spin_lock_bh(&rt2x00dev->bar_list_lock); + entry->block_acked = 1; + spin_unlock_bh(&rt2x00dev->bar_list_lock); + break; + } + rcu_read_unlock(); + +} + +static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, + struct rxdone_entry_desc *rxdesc) +{ + struct ieee80211_hdr *hdr = (void *) skb->data; + struct ieee80211_tim_ie *tim_ie; + u8 *tim; + u8 tim_len; + bool cam; + + /* If this is not a beacon, or if mac80211 has no powersaving + * configured, or if the device is already in powersaving mode + * we can exit now. */ + if (likely(!ieee80211_is_beacon(hdr->frame_control) || + !(rt2x00dev->hw->conf.flags & IEEE80211_CONF_PS))) + return; + + /* min. beacon length + FCS_LEN */ + if (skb->len <= 40 + FCS_LEN) + return; + + /* and only beacons from the associated BSSID, please */ + if (!(rxdesc->dev_flags & RXDONE_MY_BSS) || + !rt2x00dev->aid) + return; + + rt2x00dev->last_beacon = jiffies; + + tim = rt2x00lib_find_ie(skb->data, skb->len - FCS_LEN, WLAN_EID_TIM); + if (!tim) + return; + + if (tim[1] < sizeof(*tim_ie)) + return; - sband = &rt2x00dev->bands[rt2x00dev->curr_band]; - for (i = 0; i < sband->n_bitrates; i++) { - rate = rt2x00_get_rate(sband->bitrates[i].hw_value); + tim_len = tim[1]; + tim_ie = (struct ieee80211_tim_ie *) &tim[2]; - if (((type == RXDONE_SIGNAL_PLCP) && - (rate->plcp == signal)) || - ((type == RXDONE_SIGNAL_BITRATE) && - (rate->bitrate == signal)) || - ((type == RXDONE_SIGNAL_MCS) && - (rate->mcs == signal))) { - return i; + /* Check whenever the PHY can be turned off again. */ + + /* 1. What about buffered unicast traffic for our AID? */ + cam = ieee80211_check_tim(tim_ie, tim_len, rt2x00dev->aid); + + /* 2. Maybe the AP wants to send multicast/broadcast data? */ + cam |= (tim_ie->bitmap_ctrl & 0x01); + + if (!cam && !test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags)) + queue_work(rt2x00dev->workqueue, &rt2x00dev->sleep_work); +} + +static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev, + struct rxdone_entry_desc *rxdesc) +{ + struct ieee80211_supported_band *sband; + const struct rt2x00_rate *rate; + unsigned int i; + int signal = rxdesc->signal; + int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK); + + switch (rxdesc->rate_mode) { + case RATE_MODE_CCK: + case RATE_MODE_OFDM: + /* + * For non-HT rates the MCS value needs to contain the + * actually used rate modulation (CCK or OFDM). + */ + if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS) + signal = RATE_MCS(rxdesc->rate_mode, signal); + + sband = &rt2x00dev->bands[rt2x00dev->curr_band]; + for (i = 0; i < sband->n_bitrates; i++) { + rate = rt2x00_get_rate(sband->bitrates[i].hw_value); + if (((type == RXDONE_SIGNAL_PLCP) && + (rate->plcp == signal)) || + ((type == RXDONE_SIGNAL_BITRATE) && + (rate->bitrate == signal)) || + ((type == RXDONE_SIGNAL_MCS) && + (rate->mcs == signal))) { + return i; + } } + break; + case RATE_MODE_HT_MIX: + case RATE_MODE_HT_GREENFIELD: + if (signal >= 0 && signal <= 76) + return signal; + break; + default: + break; } - WARNING(rt2x00dev, "Frame received with unrecognized signal, " - "signal=0x%.4x, type=%d.\n", signal, type); + rt2x00_warn(rt2x00dev, "Frame received with unrecognized signal, mode=0x%.4x, signal=0x%.4x, type=%d\n", + rxdesc->rate_mode, signal, type); return 0; } -void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev, - struct queue_entry *entry) +void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp) { + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; struct rxdone_entry_desc rxdesc; struct sk_buff *skb; - struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; + struct ieee80211_rx_status *rx_status; unsigned int header_length; int rate_idx; + + if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || + !test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) + goto submit_entry; + + if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) + goto submit_entry; + /* * Allocate a new sk_buffer. If no new buffer available, drop the * received frame and reuse the existing buffer. */ - skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry); + skb = rt2x00queue_alloc_rxskb(entry, gfp); if (!skb) - return; + goto submit_entry; /* * Unmap the skb. */ - rt2x00queue_unmap_skb(rt2x00dev, entry->skb); + rt2x00queue_unmap_skb(entry); /* * Extract the RXD details. @@ -385,8 +712,17 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev, memset(&rxdesc, 0, sizeof(rxdesc)); rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); - /* Trim buffer to correct size */ - skb_trim(entry->skb, rxdesc.size); + /* + * Check for valid size in case we get corrupted descriptor from + * hardware. + */ + if (unlikely(rxdesc.size == 0 || + rxdesc.size > entry->queue->data_size)) { + rt2x00_err(rt2x00dev, "Wrong frame size %d max %d\n", + rxdesc.size, entry->queue->data_size); + dev_kfree_skb(entry->skb); + goto renew_skb; + } /* * The data behind the ieee80211 header must be @@ -397,62 +733,83 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev, /* * Hardware might have stripped the IV/EIV/ICV data, * in that case it is possible that the data was - * provided seperately (through hardware descriptor) + * provided separately (through hardware descriptor) * in which case we should reinsert the data into the frame. */ if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) && (rxdesc.flags & RX_FLAG_IV_STRIPPED)) rt2x00crypto_rx_insert_iv(entry->skb, header_length, &rxdesc); - else if (rxdesc.dev_flags & RXDONE_L2PAD) + else if (header_length && + (rxdesc.size > header_length) && + (rxdesc.dev_flags & RXDONE_L2PAD)) rt2x00queue_remove_l2pad(entry->skb, header_length); - else - rt2x00queue_align_payload(entry->skb, header_length); + + /* Trim buffer to correct size */ + skb_trim(entry->skb, rxdesc.size); /* - * Check if the frame was received using HT. In that case, - * the rate is the MCS index and should be passed to mac80211 - * directly. Otherwise we need to translate the signal to - * the correct bitrate index. + * Translate the signal to the correct bitrate index. */ - if (rxdesc.rate_mode == RATE_MODE_CCK || - rxdesc.rate_mode == RATE_MODE_OFDM) { - rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc); - } else { + rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc); + if (rxdesc.rate_mode == RATE_MODE_HT_MIX || + rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD) rxdesc.flags |= RX_FLAG_HT; - rate_idx = rxdesc.signal; - } + + /* + * Check if this is a beacon, and more frames have been + * buffered while we were in powersaving mode. + */ + rt2x00lib_rxdone_check_ps(rt2x00dev, entry->skb, &rxdesc); + + /* + * Check for incoming BlockAcks to match to the BlockAckReqs + * we've send out. + */ + rt2x00lib_rxdone_check_ba(rt2x00dev, entry->skb, &rxdesc); /* * Update extra components */ rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc); rt2x00debug_update_crypto(rt2x00dev, &rxdesc); + rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); + + /* + * Initialize RX status information, and send frame + * to mac80211. + */ + rx_status = IEEE80211_SKB_RXCB(entry->skb); + + /* Ensure that all fields of rx_status are initialized + * properly. The skb->cb array was used for driver + * specific informations, so rx_status might contain + * garbage. + */ + memset(rx_status, 0, sizeof(*rx_status)); rx_status->mactime = rxdesc.timestamp; + rx_status->band = rt2x00dev->curr_band; + rx_status->freq = rt2x00dev->curr_freq; rx_status->rate_idx = rate_idx; rx_status->signal = rxdesc.rssi; - rx_status->noise = rxdesc.noise; rx_status->flag = rxdesc.flags; rx_status->antenna = rt2x00dev->link.ant.active.rx; - /* - * Send frame to mac80211 & debugfs. - * mac80211 will clean up the skb structure. - */ - rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); - memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status)); - ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb); + ieee80211_rx_ni(rt2x00dev->hw, entry->skb); +renew_skb: /* * Replace the skb with the freshly allocated one. */ entry->skb = skb; - entry->flags = 0; - rt2x00dev->ops->lib->clear_entry(entry); - - rt2x00queue_index_inc(entry->queue, Q_INDEX); +submit_entry: + entry->flags = 0; + rt2x00queue_index_inc(entry, Q_INDEX_DONE); + if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && + test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) + rt2x00dev->ops->lib->clear_entry(entry); } EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); @@ -550,7 +907,10 @@ static void rt2x00lib_channel(struct ieee80211_channel *entry, const int channel, const int tx_power, const int value) { - entry->center_freq = ieee80211_channel_to_frequency(channel); + /* XXX: this assumption about the band is wrong for 802.11j */ + entry->band = channel <= 14 ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; + entry->center_freq = ieee80211_channel_to_frequency(channel, + entry->band); entry->hw_value = value; entry->max_power = tx_power; entry->max_antenna_gain = 0xff; @@ -561,7 +921,7 @@ static void rt2x00lib_rate(struct ieee80211_rate *entry, { entry->flags = 0; entry->bitrate = rate->bitrate; - entry->hw_value =index; + entry->hw_value = index; entry->hw_value_short = index; if (rate->flags & DEV_RATE_SHORT_PREAMBLE) @@ -583,11 +943,11 @@ static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, if (spec->supported_rates & SUPPORT_RATE_OFDM) num_rates += 8; - channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); + channels = kcalloc(spec->num_channels, sizeof(*channels), GFP_KERNEL); if (!channels) return -ENOMEM; - rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL); + rates = kcalloc(num_rates, sizeof(*rates), GFP_KERNEL); if (!rates) goto exit_free_channels; @@ -603,7 +963,7 @@ static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, for (i = 0; i < spec->num_channels; i++) { rt2x00lib_channel(&channels[i], spec->channels[i].channel, - spec->channels_info[i].tx_power1, i); + spec->channels_info[i].max_power, i); } /* @@ -644,7 +1004,7 @@ static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, exit_free_channels: kfree(channels); - ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); + rt2x00_err(rt2x00dev, "Allocation ieee80211 modes failed\n"); return -ENOMEM; } @@ -686,7 +1046,64 @@ static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) /* * Initialize extra TX headroom required. */ - rt2x00dev->hw->extra_tx_headroom = rt2x00dev->ops->extra_tx_headroom; + rt2x00dev->hw->extra_tx_headroom = + max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM, + rt2x00dev->extra_tx_headroom); + + /* + * Take TX headroom required for alignment into account. + */ + if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) + rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE; + else if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) + rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE; + + /* + * Tell mac80211 about the size of our private STA structure. + */ + rt2x00dev->hw->sta_data_size = sizeof(struct rt2x00_sta); + + /* + * Allocate tx status FIFO for driver use. + */ + if (test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags)) { + /* + * Allocate the txstatus fifo. In the worst case the tx + * status fifo has to hold the tx status of all entries + * in all tx queues. Hence, calculate the kfifo size as + * tx_queues * entry_num and round up to the nearest + * power of 2. + */ + int kfifo_size = + roundup_pow_of_two(rt2x00dev->ops->tx_queues * + rt2x00dev->tx->limit * + sizeof(u32)); + + status = kfifo_alloc(&rt2x00dev->txstatus_fifo, kfifo_size, + GFP_KERNEL); + if (status) + return status; + } + + /* + * Initialize tasklets if used by the driver. Tasklets are + * disabled until the interrupts are turned on. The driver + * has to handle that. + */ +#define RT2X00_TASKLET_INIT(taskletname) \ + if (rt2x00dev->ops->lib->taskletname) { \ + tasklet_init(&rt2x00dev->taskletname, \ + rt2x00dev->ops->lib->taskletname, \ + (unsigned long)rt2x00dev); \ + } + + RT2X00_TASKLET_INIT(txstatus_tasklet); + RT2X00_TASKLET_INIT(pretbtt_tasklet); + RT2X00_TASKLET_INIT(tbtt_tasklet); + RT2X00_TASKLET_INIT(rxdone_tasklet); + RT2X00_TASKLET_INIT(autowake_tasklet); + +#undef RT2X00_TASKLET_INIT /* * Register HW. @@ -709,9 +1126,10 @@ static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) return; /* - * Unregister extra components. + * Stop rfkill polling. */ - rt2x00rfkill_unregister(rt2x00dev); + if (test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags)) + rt2x00rfkill_unregister(rt2x00dev); /* * Allow the HW to uninitialize. @@ -750,9 +1168,10 @@ static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags); /* - * Register the extra components. + * Start rfkill polling. */ - rt2x00rfkill_register(rt2x00dev); + if (test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags)) + rt2x00rfkill_register(rt2x00dev); return 0; } @@ -785,10 +1204,8 @@ int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) /* Enable the radio */ retval = rt2x00lib_enable_radio(rt2x00dev); - if (retval) { - rt2x00queue_uninitialize(rt2x00dev); + if (retval) return retval; - } set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags); @@ -811,6 +1228,51 @@ void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) rt2x00dev->intf_associated = 0; } +static inline void rt2x00lib_set_if_combinations(struct rt2x00_dev *rt2x00dev) +{ + struct ieee80211_iface_limit *if_limit; + struct ieee80211_iface_combination *if_combination; + + if (rt2x00dev->ops->max_ap_intf < 2) + return; + + /* + * Build up AP interface limits structure. + */ + if_limit = &rt2x00dev->if_limits_ap; + if_limit->max = rt2x00dev->ops->max_ap_intf; + if_limit->types = BIT(NL80211_IFTYPE_AP); +#ifdef CONFIG_MAC80211_MESH + if_limit->types |= BIT(NL80211_IFTYPE_MESH_POINT); +#endif + + /* + * Build up AP interface combinations structure. + */ + if_combination = &rt2x00dev->if_combinations[IF_COMB_AP]; + if_combination->limits = if_limit; + if_combination->n_limits = 1; + if_combination->max_interfaces = if_limit->max; + if_combination->num_different_channels = 1; + + /* + * Finally, specify the possible combinations to mac80211. + */ + rt2x00dev->hw->wiphy->iface_combinations = rt2x00dev->if_combinations; + rt2x00dev->hw->wiphy->n_iface_combinations = 1; +} + +static unsigned int rt2x00dev_extra_tx_headroom(struct rt2x00_dev *rt2x00dev) +{ + if (WARN_ON(!rt2x00dev->tx)) + return 0; + + if (rt2x00_is_usb(rt2x00dev)) + return rt2x00dev->tx[0].winfo_size + rt2x00dev->tx[0].desc_size; + + return rt2x00dev->tx[0].winfo_size; +} + /* * driver allocation handlers. */ @@ -818,7 +1280,27 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) { int retval = -ENOMEM; + /* + * Set possible interface combinations. + */ + rt2x00lib_set_if_combinations(rt2x00dev); + + /* + * Allocate the driver data memory, if necessary. + */ + if (rt2x00dev->ops->drv_data_size > 0) { + rt2x00dev->drv_data = kzalloc(rt2x00dev->ops->drv_data_size, + GFP_KERNEL); + if (!rt2x00dev->drv_data) { + retval = -ENOMEM; + goto exit; + } + } + + spin_lock_init(&rt2x00dev->irqmask_lock); mutex_init(&rt2x00dev->csr_mutex); + INIT_LIST_HEAD(&rt2x00dev->bar_list); + spin_lock_init(&rt2x00dev->bar_list_lock); set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); @@ -829,31 +1311,34 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); /* - * Determine which operating modes are supported, all modes - * which require beaconing, depend on the availability of - * beacon entries. + * rt2x00 devices can only use the last n bits of the MAC address + * for virtual interfaces. */ - rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); - if (rt2x00dev->ops->bcn->entry_num > 0) - rt2x00dev->hw->wiphy->interface_modes |= - BIT(NL80211_IFTYPE_ADHOC) | - BIT(NL80211_IFTYPE_AP) | - BIT(NL80211_IFTYPE_MESH_POINT) | - BIT(NL80211_IFTYPE_WDS); + rt2x00dev->hw->wiphy->addr_mask[ETH_ALEN - 1] = + (rt2x00dev->ops->max_ap_intf - 1); /* - * Let the driver probe the device to detect the capabilities. + * Initialize work. */ - retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); - if (retval) { - ERROR(rt2x00dev, "Failed to allocate device.\n"); + rt2x00dev->workqueue = + alloc_ordered_workqueue("%s", 0, wiphy_name(rt2x00dev->hw->wiphy)); + if (!rt2x00dev->workqueue) { + retval = -ENOMEM; goto exit; } + INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); + INIT_DELAYED_WORK(&rt2x00dev->autowakeup_work, rt2x00lib_autowakeup); + INIT_WORK(&rt2x00dev->sleep_work, rt2x00lib_sleep); + /* - * Initialize configuration work. + * Let the driver probe the device to detect the capabilities. */ - INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); + retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); + if (retval) { + rt2x00_err(rt2x00dev, "Failed to allocate device\n"); + goto exit; + } /* * Allocate queue array. @@ -862,12 +1347,32 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) if (retval) goto exit; + /* Cache TX headroom value */ + rt2x00dev->extra_tx_headroom = rt2x00dev_extra_tx_headroom(rt2x00dev); + + /* + * Determine which operating modes are supported, all modes + * which require beaconing, depend on the availability of + * beacon entries. + */ + rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); + if (rt2x00dev->bcn->limit > 0) + rt2x00dev->hw->wiphy->interface_modes |= + BIT(NL80211_IFTYPE_ADHOC) | + BIT(NL80211_IFTYPE_AP) | +#ifdef CONFIG_MAC80211_MESH + BIT(NL80211_IFTYPE_MESH_POINT) | +#endif + BIT(NL80211_IFTYPE_WDS); + + rt2x00dev->hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; + /* * Initialize ieee80211 structure. */ retval = rt2x00lib_probe_hw(rt2x00dev); if (retval) { - ERROR(rt2x00dev, "Failed to initialize hw.\n"); + rt2x00_err(rt2x00dev, "Failed to initialize hw\n"); goto exit; } @@ -878,6 +1383,12 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) rt2x00leds_register(rt2x00dev); rt2x00debug_register(rt2x00dev); + /* + * Start rfkill polling. + */ + if (!test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags)) + rt2x00rfkill_register(rt2x00dev); + return 0; exit: @@ -892,6 +1403,12 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); /* + * Stop rfkill polling. + */ + if (!test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags)) + rt2x00rfkill_unregister(rt2x00dev); + + /* * Disable radio. */ rt2x00lib_disable_radio(rt2x00dev); @@ -900,6 +1417,29 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) * Stop all work. */ cancel_work_sync(&rt2x00dev->intf_work); + cancel_delayed_work_sync(&rt2x00dev->autowakeup_work); + cancel_work_sync(&rt2x00dev->sleep_work); + if (rt2x00_is_usb(rt2x00dev)) { + hrtimer_cancel(&rt2x00dev->txstatus_timer); + cancel_work_sync(&rt2x00dev->rxdone_work); + cancel_work_sync(&rt2x00dev->txdone_work); + } + if (rt2x00dev->workqueue) + destroy_workqueue(rt2x00dev->workqueue); + + /* + * Free the tx status fifo. + */ + kfifo_free(&rt2x00dev->txstatus_fifo); + + /* + * Kill the tx status tasklet. + */ + tasklet_kill(&rt2x00dev->txstatus_tasklet); + tasklet_kill(&rt2x00dev->pretbtt_tasklet); + tasklet_kill(&rt2x00dev->tbtt_tasklet); + tasklet_kill(&rt2x00dev->rxdone_tasklet); + tasklet_kill(&rt2x00dev->autowake_tasklet); /* * Uninitialize device. @@ -926,6 +1466,12 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) * Free queue structures. */ rt2x00queue_free(rt2x00dev); + + /* + * Free the driver data. + */ + if (rt2x00dev->drv_data) + kfree(rt2x00dev->drv_data); } EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); @@ -935,7 +1481,7 @@ EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); #ifdef CONFIG_PM int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) { - NOTICE(rt2x00dev, "Going to sleep.\n"); + rt2x00_dbg(rt2x00dev, "Going to sleep\n"); /* * Prevent mac80211 from accessing driver while suspended. @@ -966,8 +1512,7 @@ int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) * device is as good as disabled. */ if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP)) - WARNING(rt2x00dev, "Device failed to enter sleep state, " - "continue suspending.\n"); + rt2x00_warn(rt2x00dev, "Device failed to enter sleep state, continue suspending\n"); return 0; } @@ -975,7 +1520,7 @@ EXPORT_SYMBOL_GPL(rt2x00lib_suspend); int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) { - NOTICE(rt2x00dev, "Waking up.\n"); + rt2x00_dbg(rt2x00dev, "Waking up\n"); /* * Restore/enable extra components. |