![Ivo van Doorn](/assets/img/avatar_default.png)
rt2x00 will only perform configuration changes from mac80211 when the configuration option has changed. This means it keeps track of the current active configuration and will check these values when the config() callback function is used. However this causes breakage when the interface has been brought down and up again, since all stored active values aren't reset while the registers might have. This is for example the case with rt61pci antenna registers which will jump to invalid values when the interface has been started. To make sure a full configuration takes place after the start() callback function, a new flag is added which will be checked during config() and skips the "what's changed" phase. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1291 lines
31 KiB
C
1291 lines
31 KiB
C
/*
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Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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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 "rt2x00.h"
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#include "rt2x00lib.h"
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/*
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* Link tuning handlers
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*/
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void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Reset link information.
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* Both the currently active vgc level as well as
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* the link tuner counter should be reset. Resetting
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* the counter is important for devices where the
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* device should only perform link tuning during the
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* first minute after being enabled.
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*/
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rt2x00dev->link.count = 0;
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rt2x00dev->link.vgc_level = 0;
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/*
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* Reset the link tuner.
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*/
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rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
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}
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static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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/*
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* Clear all (possibly) pre-existing quality statistics.
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*/
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memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
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/*
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* The RX and TX percentage should start at 50%
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* this will assure we will get at least get some
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* decent value when the link tuner starts.
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* The value will be dropped and overwritten with
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* the correct (measured )value anyway during the
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* first run of the link tuner.
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*/
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rt2x00dev->link.qual.rx_percentage = 50;
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rt2x00dev->link.qual.tx_percentage = 50;
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rt2x00lib_reset_link_tuner(rt2x00dev);
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queue_delayed_work(rt2x00dev->hw->workqueue,
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&rt2x00dev->link.work, LINK_TUNE_INTERVAL);
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}
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static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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cancel_delayed_work_sync(&rt2x00dev->link.work);
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}
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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_ENABLED_RADIO, &rt2x00dev->flags) ||
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test_bit(DEVICE_DISABLED_RADIO_HW, &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_rx(rt2x00dev);
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rt2x00queue_init_tx(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_ENABLED_RADIO, &rt2x00dev->flags);
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/*
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* Enable RX.
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*/
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
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/*
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* Start the TX queues.
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*/
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ieee80211_wake_queues(rt2x00dev->hw);
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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_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Stop the TX queues.
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*/
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ieee80211_stop_queues(rt2x00dev->hw);
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/*
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* Disable RX.
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*/
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
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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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void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
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{
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/*
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* When we are disabling the RX, we should also stop the link tuner.
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*/
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if (state == STATE_RADIO_RX_OFF)
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rt2x00lib_stop_link_tuner(rt2x00dev);
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
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/*
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* When we are enabling the RX, we should also start the link tuner.
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*/
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if (state == STATE_RADIO_RX_ON &&
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(rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
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rt2x00lib_start_link_tuner(rt2x00dev);
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}
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static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
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{
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enum antenna rx = rt2x00dev->link.ant.active.rx;
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enum antenna tx = rt2x00dev->link.ant.active.tx;
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int sample_a =
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rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
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int sample_b =
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rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
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/*
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* We are done sampling. Now we should evaluate the results.
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*/
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rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
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/*
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* During the last period we have sampled the RSSI
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* from both antenna's. It now is time to determine
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* which antenna demonstrated the best performance.
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* When we are already on the antenna with the best
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* performance, then there really is nothing for us
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* left to do.
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*/
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if (sample_a == sample_b)
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return;
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if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
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rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
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if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
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tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
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rt2x00lib_config_antenna(rt2x00dev, rx, tx);
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}
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static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
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{
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enum antenna rx = rt2x00dev->link.ant.active.rx;
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enum antenna tx = rt2x00dev->link.ant.active.tx;
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int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
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int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
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/*
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* Legacy driver indicates that we should swap antenna's
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* when the difference in RSSI is greater that 5. This
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* also should be done when the RSSI was actually better
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* then the previous sample.
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* When the difference exceeds the threshold we should
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* sample the rssi from the other antenna to make a valid
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* comparison between the 2 antennas.
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*/
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if (abs(rssi_curr - rssi_old) < 5)
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return;
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rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
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if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
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rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
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if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
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tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
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rt2x00lib_config_antenna(rt2x00dev, rx, tx);
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}
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static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
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{
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/*
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* Determine if software diversity is enabled for
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* either the TX or RX antenna (or both).
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* Always perform this check since within the link
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* tuner interval the configuration might have changed.
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*/
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rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
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rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
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if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
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rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
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rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
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if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
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rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
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rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
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if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
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!(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
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rt2x00dev->link.ant.flags = 0;
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return;
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}
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/*
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* If we have only sampled the data over the last period
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* we should now harvest the data. Otherwise just evaluate
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* the data. The latter should only be performed once
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* every 2 seconds.
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*/
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if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
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rt2x00lib_evaluate_antenna_sample(rt2x00dev);
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else if (rt2x00dev->link.count & 1)
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rt2x00lib_evaluate_antenna_eval(rt2x00dev);
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}
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static void rt2x00lib_update_link_stats(struct link *link, int rssi)
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{
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int avg_rssi = rssi;
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/*
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* Update global RSSI
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*/
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if (link->qual.avg_rssi)
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avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
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link->qual.avg_rssi = avg_rssi;
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/*
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* Update antenna RSSI
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*/
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if (link->ant.rssi_ant)
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rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
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link->ant.rssi_ant = rssi;
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}
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static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
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{
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if (qual->rx_failed || qual->rx_success)
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qual->rx_percentage =
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(qual->rx_success * 100) /
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(qual->rx_failed + qual->rx_success);
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else
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qual->rx_percentage = 50;
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if (qual->tx_failed || qual->tx_success)
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qual->tx_percentage =
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(qual->tx_success * 100) /
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(qual->tx_failed + qual->tx_success);
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else
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qual->tx_percentage = 50;
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qual->rx_success = 0;
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qual->rx_failed = 0;
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qual->tx_success = 0;
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qual->tx_failed = 0;
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}
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static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
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int rssi)
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{
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int rssi_percentage = 0;
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int signal;
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/*
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* We need a positive value for the RSSI.
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*/
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if (rssi < 0)
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rssi += rt2x00dev->rssi_offset;
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/*
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* Calculate the different percentages,
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* which will be used for the signal.
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*/
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if (rt2x00dev->rssi_offset)
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rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
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/*
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* Add the individual percentages and use the WEIGHT
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* defines to calculate the current link signal.
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*/
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signal = ((WEIGHT_RSSI * rssi_percentage) +
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(WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
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(WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
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return (signal > 100) ? 100 : signal;
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}
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static void rt2x00lib_link_tuner(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, link.work.work);
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/*
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* When the radio is shutting down we should
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* immediately cease all link tuning.
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*/
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Update statistics.
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*/
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rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
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rt2x00dev->low_level_stats.dot11FCSErrorCount +=
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rt2x00dev->link.qual.rx_failed;
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/*
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* Only perform the link tuning when Link tuning
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* has been enabled (This could have been disabled from the EEPROM).
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*/
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if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
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rt2x00dev->ops->lib->link_tuner(rt2x00dev);
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/*
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* Precalculate a portion of the link signal which is
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* in based on the tx/rx success/failure counters.
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*/
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rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
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/*
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* Send a signal to the led to update the led signal strength.
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*/
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rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
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/*
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* Evaluate antenna setup, make this the last step since this could
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* possibly reset some statistics.
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*/
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rt2x00lib_evaluate_antenna(rt2x00dev);
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/*
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* Increase tuner counter, and reschedule the next link tuner run.
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*/
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rt2x00dev->link.count++;
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queue_delayed_work(rt2x00dev->hw->workqueue,
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&rt2x00dev->link.work, LINK_TUNE_INTERVAL);
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}
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static void rt2x00lib_packetfilter_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, filter_work);
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rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
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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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struct ieee80211_bss_conf conf;
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int delayed_flags;
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/*
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* Copy all data we need during this action under the protection
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* of a spinlock. Otherwise race conditions might occur which results
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* into an invalid configuration.
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*/
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spin_lock(&intf->lock);
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memcpy(&conf, &intf->conf, sizeof(conf));
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delayed_flags = intf->delayed_flags;
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intf->delayed_flags = 0;
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spin_unlock(&intf->lock);
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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_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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if (delayed_flags & DELAYED_UPDATE_BEACON)
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rt2x00queue_update_beacon(rt2x00dev, vif);
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if (delayed_flags & DELAYED_CONFIG_ERP)
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rt2x00lib_config_erp(rt2x00dev, intf, &conf);
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if (delayed_flags & DELAYED_LED_ASSOC)
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rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
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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_beacondone_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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if (vif->type != IEEE80211_IF_TYPE_AP &&
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vif->type != IEEE80211_IF_TYPE_IBSS)
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return;
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/*
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* Clean up the beacon skb.
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*/
|
|
rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
|
|
intf->beacon->skb = NULL;
|
|
|
|
spin_lock(&intf->lock);
|
|
intf->delayed_flags |= DELAYED_UPDATE_BEACON;
|
|
spin_unlock(&intf->lock);
|
|
}
|
|
|
|
void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
|
|
return;
|
|
|
|
ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
|
|
rt2x00lib_beacondone_iter,
|
|
rt2x00dev);
|
|
|
|
schedule_work(&rt2x00dev->intf_work);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
|
|
|
|
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);
|
|
enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
|
|
|
|
/*
|
|
* Unmap the skb.
|
|
*/
|
|
rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
|
|
|
|
/*
|
|
* Send frame to debugfs immediately, after this call is completed
|
|
* we are going to overwrite the skb->cb array.
|
|
*/
|
|
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
|
|
|
|
/*
|
|
* Update TX statistics.
|
|
*/
|
|
rt2x00dev->link.qual.tx_success +=
|
|
test_bit(TXDONE_SUCCESS, &txdesc->flags);
|
|
rt2x00dev->link.qual.tx_failed +=
|
|
test_bit(TXDONE_FAILURE, &txdesc->flags);
|
|
|
|
/*
|
|
* Initialize TX status
|
|
*/
|
|
memset(&tx_info->status, 0, sizeof(tx_info->status));
|
|
tx_info->status.ack_signal = 0;
|
|
tx_info->status.excessive_retries =
|
|
test_bit(TXDONE_EXCESSIVE_RETRY, &txdesc->flags);
|
|
tx_info->status.retry_count = txdesc->retry;
|
|
|
|
if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
|
|
if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
|
|
tx_info->flags |= IEEE80211_TX_STAT_ACK;
|
|
else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11ACKFailureCount++;
|
|
}
|
|
|
|
if (tx_info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
|
|
if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
|
|
else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11RTSFailureCount++;
|
|
}
|
|
|
|
/*
|
|
* Only send the status report to mac80211 when TX status was
|
|
* requested by it. If this was a extra frame coming through
|
|
* a mac80211 library call (RTS/CTS) then we should not send the
|
|
* status report back.
|
|
*/
|
|
if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
|
|
ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
|
|
else
|
|
dev_kfree_skb_irq(entry->skb);
|
|
|
|
/*
|
|
* Make this entry available for reuse.
|
|
*/
|
|
entry->skb = NULL;
|
|
entry->flags = 0;
|
|
|
|
rt2x00dev->ops->lib->init_txentry(rt2x00dev, entry);
|
|
|
|
__clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
|
|
rt2x00queue_index_inc(entry->queue, 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.
|
|
*/
|
|
if (!rt2x00queue_threshold(entry->queue))
|
|
ieee80211_wake_queue(rt2x00dev->hw, qid);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
|
|
|
|
void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
|
|
struct queue_entry *entry)
|
|
{
|
|
struct rxdone_entry_desc rxdesc;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_hdr *hdr;
|
|
const struct rt2x00_rate *rate;
|
|
unsigned int header_size;
|
|
unsigned int align;
|
|
unsigned int i;
|
|
int idx = -1;
|
|
|
|
/*
|
|
* 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);
|
|
if (!skb)
|
|
return;
|
|
|
|
/*
|
|
* Unmap the skb.
|
|
*/
|
|
rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
|
|
|
|
/*
|
|
* Extract the RXD details.
|
|
*/
|
|
memset(&rxdesc, 0, sizeof(rxdesc));
|
|
rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
|
|
|
|
/*
|
|
* The data behind the ieee80211 header must be
|
|
* aligned on a 4 byte boundary.
|
|
*/
|
|
header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
|
|
align = ((unsigned long)(entry->skb->data + header_size)) & 3;
|
|
|
|
if (align) {
|
|
skb_push(entry->skb, align);
|
|
/* Move entire frame in 1 command */
|
|
memmove(entry->skb->data, entry->skb->data + align,
|
|
rxdesc.size);
|
|
}
|
|
|
|
/* Update data pointers, trim buffer to correct size */
|
|
skb_trim(entry->skb, rxdesc.size);
|
|
|
|
/*
|
|
* Update RX statistics.
|
|
*/
|
|
sband = &rt2x00dev->bands[rt2x00dev->curr_band];
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
|
|
|
|
if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
|
|
(rate->plcp == rxdesc.signal)) ||
|
|
(!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
|
|
(rate->bitrate == rxdesc.signal))) {
|
|
idx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (idx < 0) {
|
|
WARNING(rt2x00dev, "Frame received with unrecognized signal,"
|
|
"signal=0x%.2x, plcp=%d.\n", rxdesc.signal,
|
|
!!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP));
|
|
idx = 0;
|
|
}
|
|
|
|
/*
|
|
* Only update link status if this is a beacon frame carrying our bssid.
|
|
*/
|
|
hdr = (struct ieee80211_hdr *)entry->skb->data;
|
|
if (ieee80211_is_beacon(hdr->frame_control) &&
|
|
(rxdesc.dev_flags & RXDONE_MY_BSS))
|
|
rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc.rssi);
|
|
|
|
rt2x00dev->link.qual.rx_success++;
|
|
|
|
rx_status->mactime = rxdesc.timestamp;
|
|
rx_status->rate_idx = idx;
|
|
rx_status->qual =
|
|
rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc.rssi);
|
|
rx_status->signal = rxdesc.rssi;
|
|
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);
|
|
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
|
|
|
|
/*
|
|
* Replace the skb with the freshly allocated one.
|
|
*/
|
|
entry->skb = skb;
|
|
entry->flags = 0;
|
|
|
|
rt2x00dev->ops->lib->init_rxentry(rt2x00dev, entry);
|
|
|
|
rt2x00queue_index_inc(entry->queue, Q_INDEX);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
|
|
|
|
/*
|
|
* Driver initialization handlers.
|
|
*/
|
|
const struct rt2x00_rate rt2x00_supported_rates[12] = {
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_BASIC,
|
|
.bitrate = 10,
|
|
.ratemask = BIT(0),
|
|
.plcp = 0x00,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 20,
|
|
.ratemask = BIT(1),
|
|
.plcp = 0x01,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 55,
|
|
.ratemask = BIT(2),
|
|
.plcp = 0x02,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 110,
|
|
.ratemask = BIT(3),
|
|
.plcp = 0x03,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 60,
|
|
.ratemask = BIT(4),
|
|
.plcp = 0x0b,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 90,
|
|
.ratemask = BIT(5),
|
|
.plcp = 0x0f,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 120,
|
|
.ratemask = BIT(6),
|
|
.plcp = 0x0a,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 180,
|
|
.ratemask = BIT(7),
|
|
.plcp = 0x0e,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 240,
|
|
.ratemask = BIT(8),
|
|
.plcp = 0x09,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 360,
|
|
.ratemask = BIT(9),
|
|
.plcp = 0x0d,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 480,
|
|
.ratemask = BIT(10),
|
|
.plcp = 0x08,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 540,
|
|
.ratemask = BIT(11),
|
|
.plcp = 0x0c,
|
|
},
|
|
};
|
|
|
|
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 = rt2x00_create_rate_hw_value(index, 0);
|
|
entry->hw_value_short = entry->hw_value;
|
|
|
|
if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
|
|
entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
|
|
entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
|
|
}
|
|
}
|
|
|
|
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;
|
|
unsigned char tx_power;
|
|
|
|
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++) {
|
|
if (spec->channels[i].channel <= 14) {
|
|
if (spec->tx_power_bg)
|
|
tx_power = spec->tx_power_bg[i];
|
|
else
|
|
tx_power = spec->tx_power_default;
|
|
} else {
|
|
if (spec->tx_power_a)
|
|
tx_power = spec->tx_power_a[i];
|
|
else
|
|
tx_power = spec->tx_power_default;
|
|
}
|
|
|
|
rt2x00lib_channel(&channels[i],
|
|
spec->channels[i].channel, tx_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];
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
}
|
|
|
|
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_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;
|
|
}
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct hw_mode_spec *spec = &rt2x00dev->spec;
|
|
int status;
|
|
|
|
/*
|
|
* Initialize HW modes.
|
|
*/
|
|
status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
|
|
if (status)
|
|
return status;
|
|
|
|
/*
|
|
* Initialize HW fields.
|
|
*/
|
|
rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
|
|
|
|
/*
|
|
* Register HW.
|
|
*/
|
|
status = ieee80211_register_hw(rt2x00dev->hw);
|
|
if (status) {
|
|
rt2x00lib_remove_hw(rt2x00dev);
|
|
return status;
|
|
}
|
|
|
|
__set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialization/uninitialization handlers.
|
|
*/
|
|
static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!__test_and_clear_bit(DEVICE_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_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_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_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;
|
|
|
|
/*
|
|
* Enable radio.
|
|
*/
|
|
retval = rt2x00lib_enable_radio(rt2x00dev);
|
|
if (retval) {
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
return retval;
|
|
}
|
|
|
|
rt2x00dev->intf_ap_count = 0;
|
|
rt2x00dev->intf_sta_count = 0;
|
|
rt2x00dev->intf_associated = 0;
|
|
|
|
__set_bit(DEVICE_STARTED, &rt2x00dev->flags);
|
|
__set_bit(DEVICE_DIRTY_CONFIG, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!test_bit(DEVICE_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;
|
|
|
|
__clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
|
|
}
|
|
|
|
/*
|
|
* driver allocation handlers.
|
|
*/
|
|
int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int retval = -ENOMEM;
|
|
|
|
/*
|
|
* Make room for rt2x00_intf inside the per-interface
|
|
* structure ieee80211_vif.
|
|
*/
|
|
rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* Initialize configuration work.
|
|
*/
|
|
INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
|
|
INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
|
|
INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
rt2x00leds_register(rt2x00dev);
|
|
rt2x00rfkill_allocate(rt2x00dev);
|
|
rt2x00debug_register(rt2x00dev);
|
|
|
|
__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
|
|
|
|
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_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Disable radio.
|
|
*/
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
|
|
/*
|
|
* Uninitialize device.
|
|
*/
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Free extra components
|
|
*/
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
rt2x00rfkill_free(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)
|
|
{
|
|
int retval;
|
|
|
|
NOTICE(rt2x00dev, "Going to sleep.\n");
|
|
__clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Only continue if mac80211 has open interfaces.
|
|
*/
|
|
if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
|
|
goto exit;
|
|
__set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Disable radio.
|
|
*/
|
|
rt2x00lib_stop(rt2x00dev);
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Suspend/disable extra components.
|
|
*/
|
|
rt2x00leds_suspend(rt2x00dev);
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
|
|
exit:
|
|
/*
|
|
* 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.
|
|
*/
|
|
retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
|
|
if (retval)
|
|
WARNING(rt2x00dev, "Device failed to enter sleep state, "
|
|
"continue suspending.\n");
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
|
|
|
|
static void rt2x00lib_resume_intf(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif)
|
|
{
|
|
struct rt2x00_dev *rt2x00dev = data;
|
|
struct rt2x00_intf *intf = vif_to_intf(vif);
|
|
|
|
spin_lock(&intf->lock);
|
|
|
|
rt2x00lib_config_intf(rt2x00dev, intf,
|
|
vif->type, intf->mac, intf->bssid);
|
|
|
|
|
|
/*
|
|
* Master or Ad-hoc mode require a new beacon update.
|
|
*/
|
|
if (vif->type == IEEE80211_IF_TYPE_AP ||
|
|
vif->type == IEEE80211_IF_TYPE_IBSS)
|
|
intf->delayed_flags |= DELAYED_UPDATE_BEACON;
|
|
|
|
spin_unlock(&intf->lock);
|
|
}
|
|
|
|
int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int retval;
|
|
|
|
NOTICE(rt2x00dev, "Waking up.\n");
|
|
|
|
/*
|
|
* Restore/enable extra components.
|
|
*/
|
|
rt2x00debug_register(rt2x00dev);
|
|
rt2x00leds_resume(rt2x00dev);
|
|
|
|
/*
|
|
* Only continue if mac80211 had open interfaces.
|
|
*/
|
|
if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Reinitialize device and all active interfaces.
|
|
*/
|
|
retval = rt2x00lib_start(rt2x00dev);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Reconfigure device.
|
|
*/
|
|
retval = rt2x00mac_config(rt2x00dev->hw, &rt2x00dev->hw->conf);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Iterator over each active interface to
|
|
* reconfigure the hardware.
|
|
*/
|
|
ieee80211_iterate_active_interfaces(rt2x00dev->hw,
|
|
rt2x00lib_resume_intf, rt2x00dev);
|
|
|
|
/*
|
|
* We are ready again to receive requests from mac80211.
|
|
*/
|
|
__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* It is possible that during that mac80211 has attempted
|
|
* to send frames while we were suspending or resuming.
|
|
* In that case we have disabled the TX queue and should
|
|
* now enable it again
|
|
*/
|
|
ieee80211_wake_queues(rt2x00dev->hw);
|
|
|
|
/*
|
|
* During interface iteration we might have changed the
|
|
* delayed_flags, time to handles the event by calling
|
|
* the work handler directly.
|
|
*/
|
|
rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
|
|
|
|
return 0;
|
|
|
|
exit:
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
|
|
return retval;
|
|
}
|
|
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");
|