![Helmut Schaa](/assets/img/avatar_default.png)
Instead of protecting delayed_flags with a spinlock use atomic bitops to make the code more readable. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Acked-by: Gertjan van Wingerde <gwingerde@gmail.com> Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1146 lines
28 KiB
C
1146 lines
28 KiB
C
/*
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Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
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Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 generic device routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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/*
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* Radio control handlers.
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*/
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int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
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{
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int status;
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/*
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* Don't enable the radio twice.
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* And check if the hardware button has been disabled.
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*/
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if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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return 0;
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/*
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* Initialize all data queues.
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*/
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rt2x00queue_init_queues(rt2x00dev);
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/*
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* Enable radio.
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*/
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status =
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
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if (status)
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return status;
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
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rt2x00leds_led_radio(rt2x00dev, true);
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rt2x00led_led_activity(rt2x00dev, true);
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set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
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/*
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* Enable queues.
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*/
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rt2x00queue_start_queues(rt2x00dev);
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rt2x00link_start_tuner(rt2x00dev);
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/*
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* Start watchdog monitoring.
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*/
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rt2x00link_start_watchdog(rt2x00dev);
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return 0;
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}
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void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
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{
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if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Stop watchdog monitoring.
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*/
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rt2x00link_stop_watchdog(rt2x00dev);
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/*
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* Stop all queues
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*/
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rt2x00link_stop_tuner(rt2x00dev);
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rt2x00queue_stop_queues(rt2x00dev);
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rt2x00queue_flush_queues(rt2x00dev, true);
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/*
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* Disable radio.
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*/
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
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rt2x00led_led_activity(rt2x00dev, false);
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rt2x00leds_led_radio(rt2x00dev, false);
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}
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static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct rt2x00_dev *rt2x00dev = data;
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struct rt2x00_intf *intf = vif_to_intf(vif);
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/*
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* It is possible the radio was disabled while the work had been
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* scheduled. If that happens we should return here immediately,
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* note that in the spinlock protected area above the delayed_flags
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* have been cleared correctly.
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*/
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if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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if (test_and_clear_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags))
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rt2x00queue_update_beacon(rt2x00dev, vif, true);
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}
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static void rt2x00lib_intf_scheduled(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, intf_work);
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/*
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* Iterate over each interface and perform the
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* requested configurations.
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*/
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ieee80211_iterate_active_interfaces(rt2x00dev->hw,
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rt2x00lib_intf_scheduled_iter,
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rt2x00dev);
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}
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/*
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* Interrupt context handlers.
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*/
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static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct rt2x00_dev *rt2x00dev = data;
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struct sk_buff *skb;
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/*
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* Only AP mode interfaces do broad- and multicast buffering
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*/
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if (vif->type != NL80211_IFTYPE_AP)
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return;
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/*
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* Send out buffered broad- and multicast frames
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*/
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skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
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while (skb) {
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rt2x00mac_tx(rt2x00dev->hw, skb);
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skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
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}
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}
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static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct rt2x00_dev *rt2x00dev = data;
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if (vif->type != NL80211_IFTYPE_AP &&
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vif->type != NL80211_IFTYPE_ADHOC &&
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vif->type != NL80211_IFTYPE_MESH_POINT &&
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vif->type != NL80211_IFTYPE_WDS)
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return;
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rt2x00queue_update_beacon(rt2x00dev, vif, true);
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}
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void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
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{
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if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/* send buffered bc/mc frames out for every bssid */
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ieee80211_iterate_active_interfaces(rt2x00dev->hw,
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rt2x00lib_bc_buffer_iter,
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rt2x00dev);
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/*
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* Devices with pre tbtt interrupt don't need to update the beacon
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* here as they will fetch the next beacon directly prior to
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* transmission.
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*/
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if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT, &rt2x00dev->flags))
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return;
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/* fetch next beacon */
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ieee80211_iterate_active_interfaces(rt2x00dev->hw,
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rt2x00lib_beaconupdate_iter,
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rt2x00dev);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
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void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev)
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{
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if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/* fetch next beacon */
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ieee80211_iterate_active_interfaces(rt2x00dev->hw,
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rt2x00lib_beaconupdate_iter,
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rt2x00dev);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt);
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void rt2x00lib_dmastart(struct queue_entry *entry)
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{
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set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
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rt2x00queue_index_inc(entry->queue, Q_INDEX);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_dmastart);
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void rt2x00lib_dmadone(struct queue_entry *entry)
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{
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set_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags);
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clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
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rt2x00queue_index_inc(entry->queue, Q_INDEX_DMA_DONE);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_dmadone);
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void rt2x00lib_txdone(struct queue_entry *entry,
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struct txdone_entry_desc *txdesc)
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{
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
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struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
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unsigned int header_length, i;
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u8 rate_idx, rate_flags, retry_rates;
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u8 skbdesc_flags = skbdesc->flags;
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bool success;
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/*
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* Unmap the skb.
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*/
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rt2x00queue_unmap_skb(entry);
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/*
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* Remove the extra tx headroom from the skb.
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*/
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skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom);
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/*
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* Signal that the TX descriptor is no longer in the skb.
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*/
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skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;
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/*
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* Determine the length of 802.11 header.
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*/
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header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
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/*
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* Remove L2 padding which was added during
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*/
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if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
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rt2x00queue_remove_l2pad(entry->skb, header_length);
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/*
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* If the IV/EIV data was stripped from the frame before it was
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* passed to the hardware, we should now reinsert it again because
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* mac80211 will expect the same data to be present it the
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* frame as it was passed to us.
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*/
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if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
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rt2x00crypto_tx_insert_iv(entry->skb, header_length);
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/*
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* Send frame to debugfs immediately, after this call is completed
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* we are going to overwrite the skb->cb array.
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*/
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rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
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/*
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* Determine if the frame has been successfully transmitted.
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*/
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success =
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test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
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test_bit(TXDONE_UNKNOWN, &txdesc->flags);
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/*
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* Update TX statistics.
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*/
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rt2x00dev->link.qual.tx_success += success;
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rt2x00dev->link.qual.tx_failed += !success;
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rate_idx = skbdesc->tx_rate_idx;
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rate_flags = skbdesc->tx_rate_flags;
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retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?
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(txdesc->retry + 1) : 1;
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/*
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* Initialize TX status
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*/
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memset(&tx_info->status, 0, sizeof(tx_info->status));
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tx_info->status.ack_signal = 0;
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/*
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* Frame was send with retries, hardware tried
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* different rates to send out the frame, at each
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* retry it lowered the rate 1 step except when the
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* lowest rate was used.
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*/
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for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {
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tx_info->status.rates[i].idx = rate_idx - i;
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tx_info->status.rates[i].flags = rate_flags;
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if (rate_idx - i == 0) {
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/*
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* The lowest rate (index 0) was used until the
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* number of max retries was reached.
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*/
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tx_info->status.rates[i].count = retry_rates - i;
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i++;
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break;
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}
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tx_info->status.rates[i].count = 1;
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}
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if (i < (IEEE80211_TX_MAX_RATES - 1))
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tx_info->status.rates[i].idx = -1; /* terminate */
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if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
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if (success)
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tx_info->flags |= IEEE80211_TX_STAT_ACK;
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else
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rt2x00dev->low_level_stats.dot11ACKFailureCount++;
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}
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/*
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* Every single frame has it's own tx status, hence report
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* every frame as ampdu of size 1.
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*
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* TODO: if we can find out how many frames were aggregated
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* by the hw we could provide the real ampdu_len to mac80211
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* which would allow the rc algorithm to better decide on
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* which rates are suitable.
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*/
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if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
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tx_info->flags |= IEEE80211_TX_STAT_AMPDU;
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tx_info->status.ampdu_len = 1;
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tx_info->status.ampdu_ack_len = success ? 1 : 0;
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}
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if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
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if (success)
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rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
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else
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rt2x00dev->low_level_stats.dot11RTSFailureCount++;
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}
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/*
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* Only send the status report to mac80211 when it's a frame
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* that originated in mac80211. If this was a extra frame coming
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* through a mac80211 library call (RTS/CTS) then we should not
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* send the status report back.
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*/
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if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) {
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if (test_bit(DRIVER_REQUIRE_TASKLET_CONTEXT, &rt2x00dev->flags))
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ieee80211_tx_status(rt2x00dev->hw, entry->skb);
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else
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ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb);
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} else
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dev_kfree_skb_any(entry->skb);
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/*
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* Make this entry available for reuse.
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*/
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entry->skb = NULL;
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entry->flags = 0;
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rt2x00dev->ops->lib->clear_entry(entry);
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rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
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/*
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* If the data queue was below the threshold before the txdone
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* handler we must make sure the packet queue in the mac80211 stack
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* is reenabled when the txdone handler has finished.
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*/
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if (!rt2x00queue_threshold(entry->queue))
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rt2x00queue_unpause_queue(entry->queue);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
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void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status)
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{
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struct txdone_entry_desc txdesc;
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txdesc.flags = 0;
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__set_bit(status, &txdesc.flags);
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txdesc.retry = 0;
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rt2x00lib_txdone(entry, &txdesc);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo);
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static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
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struct rxdone_entry_desc *rxdesc)
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{
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struct ieee80211_supported_band *sband;
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const struct rt2x00_rate *rate;
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unsigned int i;
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int signal = rxdesc->signal;
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int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
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switch (rxdesc->rate_mode) {
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case RATE_MODE_CCK:
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case RATE_MODE_OFDM:
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/*
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* For non-HT rates the MCS value needs to contain the
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* actually used rate modulation (CCK or OFDM).
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*/
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if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
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signal = RATE_MCS(rxdesc->rate_mode, signal);
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sband = &rt2x00dev->bands[rt2x00dev->curr_band];
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for (i = 0; i < sband->n_bitrates; i++) {
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rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
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if (((type == RXDONE_SIGNAL_PLCP) &&
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(rate->plcp == signal)) ||
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((type == RXDONE_SIGNAL_BITRATE) &&
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(rate->bitrate == signal)) ||
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((type == RXDONE_SIGNAL_MCS) &&
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(rate->mcs == signal))) {
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return i;
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}
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}
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break;
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case RATE_MODE_HT_MIX:
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case RATE_MODE_HT_GREENFIELD:
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if (signal >= 0 && signal <= 76)
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return signal;
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break;
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default:
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break;
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}
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|
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WARNING(rt2x00dev, "Frame received with unrecognized signal, "
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"mode=0x%.4x, signal=0x%.4x, type=%d.\n",
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rxdesc->rate_mode, signal, type);
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return 0;
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}
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|
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void rt2x00lib_rxdone(struct queue_entry *entry)
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{
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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struct rxdone_entry_desc rxdesc;
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struct sk_buff *skb;
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struct ieee80211_rx_status *rx_status;
|
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unsigned int header_length;
|
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int rate_idx;
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if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
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!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
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goto submit_entry;
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|
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if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
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goto submit_entry;
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|
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/*
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* Allocate a new sk_buffer. If no new buffer available, drop the
|
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* received frame and reuse the existing buffer.
|
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*/
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skb = rt2x00queue_alloc_rxskb(entry);
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if (!skb)
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goto submit_entry;
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|
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/*
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* Unmap the skb.
|
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*/
|
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rt2x00queue_unmap_skb(entry);
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|
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/*
|
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* Extract the RXD details.
|
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*/
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memset(&rxdesc, 0, sizeof(rxdesc));
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rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
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|
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/*
|
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* The data behind the ieee80211 header must be
|
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* aligned on a 4 byte boundary.
|
|
*/
|
|
header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
|
|
|
|
/*
|
|
* Hardware might have stripped the IV/EIV/ICV data,
|
|
* in that case it is possible that the data was
|
|
* 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 (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);
|
|
|
|
/*
|
|
* Translate the signal to the correct bitrate index.
|
|
*/
|
|
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;
|
|
|
|
/*
|
|
* 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);
|
|
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->flag = rxdesc.flags;
|
|
rx_status->antenna = rt2x00dev->link.ant.active.rx;
|
|
|
|
ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
|
|
|
|
/*
|
|
* Replace the skb with the freshly allocated one.
|
|
*/
|
|
entry->skb = skb;
|
|
|
|
submit_entry:
|
|
entry->flags = 0;
|
|
rt2x00queue_index_inc(entry->queue, 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);
|
|
|
|
/*
|
|
* Driver initialization handlers.
|
|
*/
|
|
const struct rt2x00_rate rt2x00_supported_rates[12] = {
|
|
{
|
|
.flags = DEV_RATE_CCK,
|
|
.bitrate = 10,
|
|
.ratemask = BIT(0),
|
|
.plcp = 0x00,
|
|
.mcs = RATE_MCS(RATE_MODE_CCK, 0),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
|
|
.bitrate = 20,
|
|
.ratemask = BIT(1),
|
|
.plcp = 0x01,
|
|
.mcs = RATE_MCS(RATE_MODE_CCK, 1),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
|
|
.bitrate = 55,
|
|
.ratemask = BIT(2),
|
|
.plcp = 0x02,
|
|
.mcs = RATE_MCS(RATE_MODE_CCK, 2),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
|
|
.bitrate = 110,
|
|
.ratemask = BIT(3),
|
|
.plcp = 0x03,
|
|
.mcs = RATE_MCS(RATE_MODE_CCK, 3),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 60,
|
|
.ratemask = BIT(4),
|
|
.plcp = 0x0b,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 0),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 90,
|
|
.ratemask = BIT(5),
|
|
.plcp = 0x0f,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 1),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 120,
|
|
.ratemask = BIT(6),
|
|
.plcp = 0x0a,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 2),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 180,
|
|
.ratemask = BIT(7),
|
|
.plcp = 0x0e,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 3),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 240,
|
|
.ratemask = BIT(8),
|
|
.plcp = 0x09,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 4),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 360,
|
|
.ratemask = BIT(9),
|
|
.plcp = 0x0d,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 5),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 480,
|
|
.ratemask = BIT(10),
|
|
.plcp = 0x08,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 6),
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 540,
|
|
.ratemask = BIT(11),
|
|
.plcp = 0x0c,
|
|
.mcs = RATE_MCS(RATE_MODE_OFDM, 7),
|
|
},
|
|
};
|
|
|
|
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);
|
|
entry->hw_value = value;
|
|
entry->max_power = tx_power;
|
|
entry->max_antenna_gain = 0xff;
|
|
}
|
|
|
|
static void rt2x00lib_rate(struct ieee80211_rate *entry,
|
|
const u16 index, const struct rt2x00_rate *rate)
|
|
{
|
|
entry->flags = 0;
|
|
entry->bitrate = rate->bitrate;
|
|
entry->hw_value = index;
|
|
entry->hw_value_short = index;
|
|
|
|
if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
|
|
entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
|
|
struct hw_mode_spec *spec)
|
|
{
|
|
struct ieee80211_hw *hw = rt2x00dev->hw;
|
|
struct ieee80211_channel *channels;
|
|
struct ieee80211_rate *rates;
|
|
unsigned int num_rates;
|
|
unsigned int i;
|
|
|
|
num_rates = 0;
|
|
if (spec->supported_rates & SUPPORT_RATE_CCK)
|
|
num_rates += 4;
|
|
if (spec->supported_rates & SUPPORT_RATE_OFDM)
|
|
num_rates += 8;
|
|
|
|
channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
|
|
if (!channels)
|
|
return -ENOMEM;
|
|
|
|
rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
|
|
if (!rates)
|
|
goto exit_free_channels;
|
|
|
|
/*
|
|
* Initialize Rate list.
|
|
*/
|
|
for (i = 0; i < num_rates; i++)
|
|
rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
|
|
|
|
/*
|
|
* Initialize Channel list.
|
|
*/
|
|
for (i = 0; i < spec->num_channels; i++) {
|
|
rt2x00lib_channel(&channels[i],
|
|
spec->channels[i].channel,
|
|
spec->channels_info[i].max_power, i);
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11b, 802.11g
|
|
* Rates: CCK, OFDM.
|
|
* Channels: 2.4 GHz
|
|
*/
|
|
if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
|
|
hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
|
|
&rt2x00dev->bands[IEEE80211_BAND_2GHZ];
|
|
memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap,
|
|
&spec->ht, sizeof(spec->ht));
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11a
|
|
* Rates: OFDM.
|
|
* Channels: OFDM, UNII, HiperLAN2.
|
|
*/
|
|
if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
|
|
spec->num_channels - 14;
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
|
|
num_rates - 4;
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
|
|
hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
|
|
&rt2x00dev->bands[IEEE80211_BAND_5GHZ];
|
|
memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap,
|
|
&spec->ht, sizeof(spec->ht));
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_free_channels:
|
|
kfree(channels);
|
|
ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
|
|
ieee80211_unregister_hw(rt2x00dev->hw);
|
|
|
|
if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
|
|
kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
|
|
kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
|
|
rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
|
|
rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
|
|
}
|
|
|
|
kfree(rt2x00dev->spec.channels_info);
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct hw_mode_spec *spec = &rt2x00dev->spec;
|
|
int status;
|
|
|
|
if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Initialize HW modes.
|
|
*/
|
|
status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
|
|
if (status)
|
|
return status;
|
|
|
|
/*
|
|
* Initialize HW fields.
|
|
*/
|
|
rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
|
|
|
|
/*
|
|
* Initialize extra TX headroom required.
|
|
*/
|
|
rt2x00dev->hw->extra_tx_headroom =
|
|
max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM,
|
|
rt2x00dev->ops->extra_tx_headroom);
|
|
|
|
/*
|
|
* Take TX headroom required for alignment into account.
|
|
*/
|
|
if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
|
|
rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE;
|
|
else if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
|
|
rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE;
|
|
|
|
/*
|
|
* Allocate tx status FIFO for driver use.
|
|
*/
|
|
if (test_bit(DRIVER_REQUIRE_TXSTATUS_FIFO, &rt2x00dev->flags)) {
|
|
/*
|
|
* Allocate txstatus fifo and tasklet, we use a size of 512
|
|
* for the kfifo which is big enough to store 512/4=128 tx
|
|
* status reports. In the worst case (tx status for all tx
|
|
* queues gets reported before we've got a chance to handle
|
|
* them) 24*4=384 tx status reports need to be cached.
|
|
*/
|
|
status = kfifo_alloc(&rt2x00dev->txstatus_fifo, 512,
|
|
GFP_KERNEL);
|
|
if (status)
|
|
return status;
|
|
|
|
/* tasklet for processing the tx status reports. */
|
|
if (rt2x00dev->ops->lib->txstatus_tasklet)
|
|
tasklet_init(&rt2x00dev->txstatus_tasklet,
|
|
rt2x00dev->ops->lib->txstatus_tasklet,
|
|
(unsigned long)rt2x00dev);
|
|
|
|
}
|
|
|
|
/*
|
|
* Register HW.
|
|
*/
|
|
status = ieee80211_register_hw(rt2x00dev->hw);
|
|
if (status)
|
|
return status;
|
|
|
|
set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialization/uninitialization handlers.
|
|
*/
|
|
static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
|
|
return;
|
|
|
|
/*
|
|
* Unregister extra components.
|
|
*/
|
|
rt2x00rfkill_unregister(rt2x00dev);
|
|
|
|
/*
|
|
* Allow the HW to uninitialize.
|
|
*/
|
|
rt2x00dev->ops->lib->uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Free allocated queue entries.
|
|
*/
|
|
rt2x00queue_uninitialize(rt2x00dev);
|
|
}
|
|
|
|
static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int status;
|
|
|
|
if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Allocate all queue entries.
|
|
*/
|
|
status = rt2x00queue_initialize(rt2x00dev);
|
|
if (status)
|
|
return status;
|
|
|
|
/*
|
|
* Initialize the device.
|
|
*/
|
|
status = rt2x00dev->ops->lib->initialize(rt2x00dev);
|
|
if (status) {
|
|
rt2x00queue_uninitialize(rt2x00dev);
|
|
return status;
|
|
}
|
|
|
|
set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Register the extra components.
|
|
*/
|
|
rt2x00rfkill_register(rt2x00dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int retval;
|
|
|
|
if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* If this is the first interface which is added,
|
|
* we should load the firmware now.
|
|
*/
|
|
retval = rt2x00lib_load_firmware(rt2x00dev);
|
|
if (retval)
|
|
return retval;
|
|
|
|
/*
|
|
* Initialize the device.
|
|
*/
|
|
retval = rt2x00lib_initialize(rt2x00dev);
|
|
if (retval)
|
|
return retval;
|
|
|
|
rt2x00dev->intf_ap_count = 0;
|
|
rt2x00dev->intf_sta_count = 0;
|
|
rt2x00dev->intf_associated = 0;
|
|
|
|
/* Enable the radio */
|
|
retval = rt2x00lib_enable_radio(rt2x00dev);
|
|
if (retval)
|
|
return retval;
|
|
|
|
set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
|
|
return;
|
|
|
|
/*
|
|
* Perhaps we can add something smarter here,
|
|
* but for now just disabling the radio should do.
|
|
*/
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
|
|
rt2x00dev->intf_ap_count = 0;
|
|
rt2x00dev->intf_sta_count = 0;
|
|
rt2x00dev->intf_associated = 0;
|
|
}
|
|
|
|
/*
|
|
* driver allocation handlers.
|
|
*/
|
|
int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int retval = -ENOMEM;
|
|
|
|
mutex_init(&rt2x00dev->csr_mutex);
|
|
|
|
set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Make room for rt2x00_intf inside the per-interface
|
|
* structure ieee80211_vif.
|
|
*/
|
|
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.
|
|
*/
|
|
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);
|
|
|
|
/*
|
|
* Initialize configuration work.
|
|
*/
|
|
INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
|
|
|
|
/*
|
|
* Let the driver probe the device to detect the capabilities.
|
|
*/
|
|
retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
|
|
if (retval) {
|
|
ERROR(rt2x00dev, "Failed to allocate device.\n");
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Allocate queue array.
|
|
*/
|
|
retval = rt2x00queue_allocate(rt2x00dev);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Initialize ieee80211 structure.
|
|
*/
|
|
retval = rt2x00lib_probe_hw(rt2x00dev);
|
|
if (retval) {
|
|
ERROR(rt2x00dev, "Failed to initialize hw.\n");
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Register extra components.
|
|
*/
|
|
rt2x00link_register(rt2x00dev);
|
|
rt2x00leds_register(rt2x00dev);
|
|
rt2x00debug_register(rt2x00dev);
|
|
|
|
return 0;
|
|
|
|
exit:
|
|
rt2x00lib_remove_dev(rt2x00dev);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
|
|
|
|
void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Disable radio.
|
|
*/
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
|
|
/*
|
|
* Stop all work.
|
|
*/
|
|
cancel_work_sync(&rt2x00dev->intf_work);
|
|
cancel_work_sync(&rt2x00dev->rxdone_work);
|
|
cancel_work_sync(&rt2x00dev->txdone_work);
|
|
|
|
/*
|
|
* Free the tx status fifo.
|
|
*/
|
|
kfifo_free(&rt2x00dev->txstatus_fifo);
|
|
|
|
/*
|
|
* Kill the tx status tasklet.
|
|
*/
|
|
tasklet_kill(&rt2x00dev->txstatus_tasklet);
|
|
|
|
/*
|
|
* Uninitialize device.
|
|
*/
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Free extra components
|
|
*/
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
rt2x00leds_unregister(rt2x00dev);
|
|
|
|
/*
|
|
* Free ieee80211_hw memory.
|
|
*/
|
|
rt2x00lib_remove_hw(rt2x00dev);
|
|
|
|
/*
|
|
* Free firmware image.
|
|
*/
|
|
rt2x00lib_free_firmware(rt2x00dev);
|
|
|
|
/*
|
|
* Free queue structures.
|
|
*/
|
|
rt2x00queue_free(rt2x00dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
|
|
|
|
/*
|
|
* Device state handlers
|
|
*/
|
|
#ifdef CONFIG_PM
|
|
int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
|
|
{
|
|
NOTICE(rt2x00dev, "Going to sleep.\n");
|
|
|
|
/*
|
|
* Prevent mac80211 from accessing driver while suspended.
|
|
*/
|
|
if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Cleanup as much as possible.
|
|
*/
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Suspend/disable extra components.
|
|
*/
|
|
rt2x00leds_suspend(rt2x00dev);
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
|
|
/*
|
|
* Set device mode to sleep for power management,
|
|
* on some hardware this call seems to consistently fail.
|
|
* From the specifications it is hard to tell why it fails,
|
|
* and if this is a "bad thing".
|
|
* Overall it is safe to just ignore the failure and
|
|
* continue suspending. The only downside is that the
|
|
* device will not be in optimal power save mode, but with
|
|
* the radio and the other components already disabled the
|
|
* 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");
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
|
|
|
|
int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
NOTICE(rt2x00dev, "Waking up.\n");
|
|
|
|
/*
|
|
* Restore/enable extra components.
|
|
*/
|
|
rt2x00debug_register(rt2x00dev);
|
|
rt2x00leds_resume(rt2x00dev);
|
|
|
|
/*
|
|
* We are ready again to receive requests from mac80211.
|
|
*/
|
|
set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_resume);
|
|
#endif /* CONFIG_PM */
|
|
|
|
/*
|
|
* rt2x00lib module information.
|
|
*/
|
|
MODULE_AUTHOR(DRV_PROJECT);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_DESCRIPTION("rt2x00 library");
|
|
MODULE_LICENSE("GPL");
|