[deliverable/linux.git] / drivers / net / wireless / rt2x00 / rt2x00mac.c

/*
	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00mac
	Abstract: rt2x00 generic mac80211 routines.
 */

#include <linux/kernel.h>
#include <linux/module.h>

#include "rt2x00.h"
#include "rt2x00lib.h"

static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
				struct data_ring *ring,
				struct sk_buff *frag_skb,
				struct ieee80211_tx_control *control)
{
	struct sk_buff *skb;
	int size;

	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
		size = sizeof(struct ieee80211_cts);
	else
		size = sizeof(struct ieee80211_rts);

	skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom);
	if (!skb) {
		WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
		return NETDEV_TX_BUSY;
	}

	skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
	skb_put(skb, size);

	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
		ieee80211_ctstoself_get(rt2x00dev->hw, rt2x00dev->interface.id,
					frag_skb->data, frag_skb->len, control,
					(struct ieee80211_cts *)(skb->data));
	else
		ieee80211_rts_get(rt2x00dev->hw, rt2x00dev->interface.id,
				  frag_skb->data, frag_skb->len, control,
				  (struct ieee80211_rts *)(skb->data));

	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
		WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
		return NETDEV_TX_BUSY;
	}

	return NETDEV_TX_OK;
}

int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
		 struct ieee80211_tx_control *control)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
	struct data_ring *ring;
	u16 frame_control;

	/*
	 * Mac80211 might be calling this function while we are trying
	 * to remove the device or perhaps suspending it.
	 * Note that we can only stop the TX queues inside the TX path
	 * due to possible race conditions in mac80211.
	 */
	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) {
		ieee80211_stop_queues(hw);
		return NETDEV_TX_OK;
	}

	/*
	 * Determine which ring to put packet on.
	 */
	ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
	if (unlikely(!ring)) {
		ERROR(rt2x00dev,
		      "Attempt to send packet over invalid queue %d.\n"
		      "Please file bug report to %s.\n",
		      control->queue, DRV_PROJECT);
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	/*
	 * If CTS/RTS is required. and this frame is not CTS or RTS,
	 * create and queue that frame first. But make sure we have
	 * at least enough entries available to send this CTS/RTS
	 * frame as well as the data frame.
	 */
	frame_control = le16_to_cpu(ieee80211hdr->frame_control);
	if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
	    (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS |
			       IEEE80211_TXCTL_USE_CTS_PROTECT))) {
		if (rt2x00_ring_free(ring) <= 1) {
			ieee80211_stop_queue(rt2x00dev->hw, control->queue);
			return NETDEV_TX_BUSY;
		}

		if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control)) {
			ieee80211_stop_queue(rt2x00dev->hw, control->queue);
			return NETDEV_TX_BUSY;
		}
	}

	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
		ieee80211_stop_queue(rt2x00dev->hw, control->queue);
		return NETDEV_TX_BUSY;
	}

	if (rt2x00_ring_full(ring))
		ieee80211_stop_queue(rt2x00dev->hw, control->queue);

	if (rt2x00dev->ops->lib->kick_tx_queue)
		rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);

	return NETDEV_TX_OK;
}
EXPORT_SYMBOL_GPL(rt2x00mac_tx);

int rt2x00mac_start(struct ieee80211_hw *hw)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;

	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
		return 0;

	return rt2x00lib_start(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00mac_start);

void rt2x00mac_stop(struct ieee80211_hw *hw)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;

	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
		return;

	rt2x00lib_stop(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00mac_stop);

int rt2x00mac_add_interface(struct ieee80211_hw *hw,
			    struct ieee80211_if_init_conf *conf)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct interface *intf = &rt2x00dev->interface;

	/* FIXME: Beaconing is broken in rt2x00. */
	if (conf->type == IEEE80211_IF_TYPE_IBSS ||
	    conf->type == IEEE80211_IF_TYPE_AP) {
		ERROR(rt2x00dev,
		      "rt2x00 does not support Adhoc or Master mode");
		return -EOPNOTSUPP;
	}

	/*
	 * Don't allow interfaces to be added while
	 * either the device has disappeared or when
	 * another interface is already present.
	 */
	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) ||
	    is_interface_present(intf))
		return -ENOBUFS;

	intf->id = conf->vif;
	intf->type = conf->type;
	if (conf->type == IEEE80211_IF_TYPE_AP)
		memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
	memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);

	/*
	 * The MAC adddress must be configured after the device
	 * has been initialized. Otherwise the device can reset
	 * the MAC registers.
	 */
	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	rt2x00lib_config_type(rt2x00dev, conf->type);

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);

void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
				struct ieee80211_if_init_conf *conf)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct interface *intf = &rt2x00dev->interface;

	/*
	 * Don't allow interfaces to be remove while
	 * either the device has disappeared or when
	 * no interface is present.
	 */
	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) ||
	    !is_interface_present(intf))
		return;

	intf->id = 0;
	intf->type = IEEE80211_IF_TYPE_INVALID;
	memset(&intf->bssid, 0x00, ETH_ALEN);
	memset(&intf->mac, 0x00, ETH_ALEN);

	/*
	 * Make sure the bssid and mac address registers
	 * are cleared to prevent false ACKing of frames.
	 */
	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
	rt2x00lib_config_type(rt2x00dev, intf->type);
}
EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);

int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;

	/*
	 * Mac80211 might be calling this function while we are trying
	 * to remove the device or perhaps suspending it.
	 */
	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
		return 0;

	/*
	 * Check if we need to disable the radio,
	 * if this is not the case, at least the RX must be disabled.
	 */
	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) {
		if (!conf->radio_enabled)
			rt2x00lib_disable_radio(rt2x00dev);
		else
			rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
	}

	rt2x00lib_config(rt2x00dev, conf, 0);

	/*
	 * Reenable RX only if the radio should be on.
	 */
	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
		rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
	else if (conf->radio_enabled)
		return rt2x00lib_enable_radio(rt2x00dev);

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00mac_config);

int rt2x00mac_config_interface(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
			       struct ieee80211_if_conf *conf)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct interface *intf = &rt2x00dev->interface;
	int status;

	/*
	 * Mac80211 might be calling this function while we are trying
	 * to remove the device or perhaps suspending it.
	 */
	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
		return 0;

	/*
	 * If the given type does not match the configured type,
	 * there has been a problem.
	 */
	if (conf->type != intf->type)
		return -EINVAL;

	/*
	 * If the interface does not work in master mode,
	 * then the bssid value in the interface structure
	 * should now be set.
	 */
	if (conf->type != IEEE80211_IF_TYPE_AP)
		memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);

	/*
	 * We only need to initialize the beacon when master mode is enabled.
	 */
	if (conf->type != IEEE80211_IF_TYPE_AP || !conf->beacon)
		return 0;

	status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
						   conf->beacon,
						   conf->beacon_control);
	if (status)
		dev_kfree_skb(conf->beacon);

	return status;
}
EXPORT_SYMBOL_GPL(rt2x00mac_config_interface);

int rt2x00mac_get_stats(struct ieee80211_hw *hw,
			struct ieee80211_low_level_stats *stats)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;

	/*
	 * The dot11ACKFailureCount, dot11RTSFailureCount and
	 * dot11RTSSuccessCount are updated in interrupt time.
	 * dot11FCSErrorCount is updated in the link tuner.
	 */
	memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);

int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
			   struct ieee80211_tx_queue_stats *stats)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	unsigned int i;

	for (i = 0; i < hw->queues; i++)
		memcpy(&stats->data[i], &rt2x00dev->tx[i].stats,
		       sizeof(rt2x00dev->tx[i].stats));

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);

void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif,
				struct ieee80211_bss_conf *bss_conf,
				u32 changes)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	int short_preamble;
	int ack_timeout;
	int ack_consume_time;
	int difs;
	int preamble;

	/*
	 * We only support changing preamble mode.
	 */
	if (!(changes & BSS_CHANGED_ERP_PREAMBLE))
		return;

	short_preamble = bss_conf->use_short_preamble;
	preamble = bss_conf->use_short_preamble ?
				SHORT_PREAMBLE : PREAMBLE;

	difs = (hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
		SHORT_DIFS : DIFS;
	ack_timeout = difs + PLCP + preamble + get_duration(ACK_SIZE, 10);

	ack_consume_time = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);

	if (short_preamble)
		__set_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
	else
		__clear_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);

	rt2x00dev->ops->lib->config_preamble(rt2x00dev, short_preamble,
					     ack_timeout, ack_consume_time);
}
EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);

int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
		      const struct ieee80211_tx_queue_params *params)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct data_ring *ring;

	ring = rt2x00lib_get_ring(rt2x00dev, queue);
	if (unlikely(!ring))
		return -EINVAL;

	/*
	 * The passed variables are stored as real value ((2^n)-1).
	 * Ralink registers require to know the bit number 'n'.
	 */
	if (params->cw_min)
		ring->tx_params.cw_min = fls(params->cw_min);
	else
		ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */

	if (params->cw_max)
		ring->tx_params.cw_max = fls(params->cw_max);
	else
		ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */

	if (params->aifs)
		ring->tx_params.aifs = params->aifs;
	else
		ring->tx_params.aifs = 2;

	INFO(rt2x00dev,
	     "Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
	     queue, ring->tx_params.cw_min, ring->tx_params.cw_max,
	     ring->tx_params.aifs);

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);
Commit	Line	Data
95ea3627	1	/*
811aa9ca	2	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
95ea3627 ID	3	<http://rt2x00.serialmonkey.com>
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the
	17	Free Software Foundation, Inc.,
	18	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	19	*/
	20
	21	/*
	22	Module: rt2x00mac
	23	Abstract: rt2x00 generic mac80211 routines.
	24	*/
	25
95ea3627 ID	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28
	29	#include "rt2x00.h"
	30	#include "rt2x00lib.h"
	31
	32	static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
	33	struct data_ring *ring,
	34	struct sk_buff *frag_skb,
	35	struct ieee80211_tx_control *control)
	36	{
	37	struct sk_buff *skb;
	38	int size;
	39
	40	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
	41	size = sizeof(struct ieee80211_cts);
	42	else
	43	size = sizeof(struct ieee80211_rts);
	44
	45	skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom);
	46	if (!skb) {
	47	WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
	48	return NETDEV_TX_BUSY;
	49	}
	50
	51	skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
	52	skb_put(skb, size);
	53
	54	if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
	55	ieee80211_ctstoself_get(rt2x00dev->hw, rt2x00dev->interface.id,
	56	frag_skb->data, frag_skb->len, control,
	57	(struct ieee80211_cts *)(skb->data));
	58	else
	59	ieee80211_rts_get(rt2x00dev->hw, rt2x00dev->interface.id,
	60	frag_skb->data, frag_skb->len, control,
	61	(struct ieee80211_rts *)(skb->data));
	62
	63	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
	64	WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
	65	return NETDEV_TX_BUSY;
	66	}
	67
	68	return NETDEV_TX_OK;
	69	}
	70
	71	int rt2x00mac_tx(struct ieee80211_hw hw, struct sk_buff skb,
	72	struct ieee80211_tx_control *control)
	73	{
	74	struct rt2x00_dev *rt2x00dev = hw->priv;
	75	struct ieee80211_hdr ieee80211hdr = (struct ieee80211_hdr )skb->data;
	76	struct data_ring *ring;
	77	u16 frame_control;
	78
066cb637 ID	79	/*
	80	* Mac80211 might be calling this function while we are trying
	81	* to remove the device or perhaps suspending it.
	82	* Note that we can only stop the TX queues inside the TX path
	83	* due to possible race conditions in mac80211.
	84	*/
	85	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) {
	86	ieee80211_stop_queues(hw);
1230cb83	87	return NETDEV_TX_OK;
066cb637 ID	88	}
066cb637 ID	89
95ea3627 ID	90	/*
	91	* Determine which ring to put packet on.
	92	*/
	93	ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
	94	if (unlikely(!ring)) {
	95	ERROR(rt2x00dev,
	96	"Attempt to send packet over invalid queue %d.\n"
	97	"Please file bug report to %s.\n",
	98	control->queue, DRV_PROJECT);
	99	dev_kfree_skb_any(skb);
	100	return NETDEV_TX_OK;
	101	}
	102
	103	/*
	104	* If CTS/RTS is required. and this frame is not CTS or RTS,
	105	* create and queue that frame first. But make sure we have
	106	* at least enough entries available to send this CTS/RTS
	107	* frame as well as the data frame.
	108	*/
	109	frame_control = le16_to_cpu(ieee80211hdr->frame_control);
	110	if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
	111	(control->flags & (IEEE80211_TXCTL_USE_RTS_CTS \|
	112	IEEE80211_TXCTL_USE_CTS_PROTECT))) {
1230cb83 ID	113	if (rt2x00_ring_free(ring) <= 1) {
1230cb83 ID	114	ieee80211_stop_queue(rt2x00dev->hw, control->queue);
95ea3627	115	return NETDEV_TX_BUSY;
1230cb83	116	}
95ea3627	117
1230cb83 ID	118	if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control)) {
1230cb83 ID	119	ieee80211_stop_queue(rt2x00dev->hw, control->queue);
95ea3627	120	return NETDEV_TX_BUSY;
1230cb83	121	}
95ea3627 ID	122	}
95ea3627 ID	123
1230cb83 ID	124	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) {
1230cb83 ID	125	ieee80211_stop_queue(rt2x00dev->hw, control->queue);
95ea3627	126	return NETDEV_TX_BUSY;
1230cb83 ID	127	}
	128
	129	if (rt2x00_ring_full(ring))
	130	ieee80211_stop_queue(rt2x00dev->hw, control->queue);
95ea3627 ID	131
	132	if (rt2x00dev->ops->lib->kick_tx_queue)
	133	rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
	134
	135	return NETDEV_TX_OK;
	136	}
	137	EXPORT_SYMBOL_GPL(rt2x00mac_tx);
	138
	139	int rt2x00mac_start(struct ieee80211_hw *hw)
	140	{
	141	struct rt2x00_dev *rt2x00dev = hw->priv;
95ea3627	142
e37ea213	143	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
95ea3627 ID	144	return 0;
95ea3627 ID	145
e37ea213	146	return rt2x00lib_start(rt2x00dev);
95ea3627 ID	147	}
	148	EXPORT_SYMBOL_GPL(rt2x00mac_start);
	149
	150	void rt2x00mac_stop(struct ieee80211_hw *hw)
	151	{
	152	struct rt2x00_dev *rt2x00dev = hw->priv;
	153
066cb637 ID	154	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
	155	return;
	156
e37ea213	157	rt2x00lib_stop(rt2x00dev);
95ea3627 ID	158	}
	159	EXPORT_SYMBOL_GPL(rt2x00mac_stop);
	160
	161	int rt2x00mac_add_interface(struct ieee80211_hw *hw,
	162	struct ieee80211_if_init_conf *conf)
	163	{
	164	struct rt2x00_dev *rt2x00dev = hw->priv;
	165	struct interface *intf = &rt2x00dev->interface;
95ea3627	166
453a3fb9 ID	167	/* FIXME: Beaconing is broken in rt2x00. */
	168	if (conf->type == IEEE80211_IF_TYPE_IBSS \|\|
	169	conf->type == IEEE80211_IF_TYPE_AP) {
	170	ERROR(rt2x00dev,
	171	"rt2x00 does not support Adhoc or Master mode");
	172	return -EOPNOTSUPP;
	173	}
	174
95ea3627	175	/*
066cb637 ID	176	* Don't allow interfaces to be added while
	177	* either the device has disappeared or when
	178	* another interface is already present.
95ea3627	179	*/
066cb637 ID	180	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) \|\|
066cb637 ID	181	is_interface_present(intf))
95ea3627 ID	182	return -ENOBUFS;
95ea3627 ID	183
32bfd35d	184	intf->id = conf->vif;
4150c572 JB	185	intf->type = conf->type;
	186	if (conf->type == IEEE80211_IF_TYPE_AP)
	187	memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
	188	memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);
95ea3627 ID	189
95ea3627 ID	190	/*
95ea3627	191	* The MAC adddress must be configured after the device
4150c572 JB	192	* has been initialized. Otherwise the device can reset
4150c572 JB	193	* the MAC registers.
95ea3627 ID	194	*/
	195	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	196	rt2x00lib_config_type(rt2x00dev, conf->type);
95ea3627 ID	197
	198	return 0;
	199	}
	200	EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
	201
	202	void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
	203	struct ieee80211_if_init_conf *conf)
	204	{
	205	struct rt2x00_dev *rt2x00dev = hw->priv;
	206	struct interface *intf = &rt2x00dev->interface;
	207
	208	/*
066cb637 ID	209	* Don't allow interfaces to be remove while
	210	* either the device has disappeared or when
	211	* no interface is present.
95ea3627	212	*/
066cb637 ID	213	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) \|\|
066cb637 ID	214	!is_interface_present(intf))
95ea3627 ID	215	return;
95ea3627 ID	216
4150c572	217	intf->id = 0;
d28c2561	218	intf->type = IEEE80211_IF_TYPE_INVALID;
4150c572 JB	219	memset(&intf->bssid, 0x00, ETH_ALEN);
4150c572 JB	220	memset(&intf->mac, 0x00, ETH_ALEN);
95ea3627 ID	221
	222	/*
	223	* Make sure the bssid and mac address registers
	224	* are cleared to prevent false ACKing of frames.
	225	*/
	226	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	227	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
	228	rt2x00lib_config_type(rt2x00dev, intf->type);
95ea3627 ID	229	}
	230	EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
	231
	232	int rt2x00mac_config(struct ieee80211_hw hw, struct ieee80211_conf conf)
	233	{
	234	struct rt2x00_dev *rt2x00dev = hw->priv;
	235
	236	/*
066cb637 ID	237	* Mac80211 might be calling this function while we are trying
066cb637 ID	238	* to remove the device or perhaps suspending it.
95ea3627	239	*/
066cb637	240	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
95ea3627 ID	241	return 0;
	242
	243	/*
	244	* Check if we need to disable the radio,
	245	* if this is not the case, at least the RX must be disabled.
	246	*/
	247	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) {
	248	if (!conf->radio_enabled)
	249	rt2x00lib_disable_radio(rt2x00dev);
	250	else
5cbf830e	251	rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
95ea3627 ID	252	}
95ea3627 ID	253
066cb637	254	rt2x00lib_config(rt2x00dev, conf, 0);
95ea3627	255
95ea3627 ID	256	/*
	257	* Reenable RX only if the radio should be on.
	258	*/
	259	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
5cbf830e	260	rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
95ea3627 ID	261	else if (conf->radio_enabled)
	262	return rt2x00lib_enable_radio(rt2x00dev);
	263
	264	return 0;
	265	}
	266	EXPORT_SYMBOL_GPL(rt2x00mac_config);
	267
32bfd35d JB	268	int rt2x00mac_config_interface(struct ieee80211_hw *hw,
32bfd35d JB	269	struct ieee80211_vif *vif,
95ea3627 ID	270	struct ieee80211_if_conf *conf)
	271	{
	272	struct rt2x00_dev *rt2x00dev = hw->priv;
	273	struct interface *intf = &rt2x00dev->interface;
	274	int status;
	275
	276	/*
066cb637 ID	277	* Mac80211 might be calling this function while we are trying
066cb637 ID	278	* to remove the device or perhaps suspending it.
95ea3627	279	*/
066cb637	280	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
95ea3627 ID	281	return 0;
	282
	283	/*
95ea3627 ID	284	* If the given type does not match the configured type,
	285	* there has been a problem.
	286	*/
4150c572	287	if (conf->type != intf->type)
95ea3627 ID	288	return -EINVAL;
	289
	290	/*
	291	* If the interface does not work in master mode,
	292	* then the bssid value in the interface structure
	293	* should now be set.
	294	*/
	295	if (conf->type != IEEE80211_IF_TYPE_AP)
	296	memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
	297	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
	298
	299	/*
	300	* We only need to initialize the beacon when master mode is enabled.
	301	*/
	302	if (conf->type != IEEE80211_IF_TYPE_AP \|\| !conf->beacon)
	303	return 0;
	304
	305	status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
	306	conf->beacon,
	307	conf->beacon_control);
	308	if (status)
	309	dev_kfree_skb(conf->beacon);
	310
	311	return status;
	312	}
	313	EXPORT_SYMBOL_GPL(rt2x00mac_config_interface);
	314
95ea3627 ID	315	int rt2x00mac_get_stats(struct ieee80211_hw *hw,
	316	struct ieee80211_low_level_stats *stats)
	317	{
	318	struct rt2x00_dev *rt2x00dev = hw->priv;
	319
	320	/*
	321	* The dot11ACKFailureCount, dot11RTSFailureCount and
	322	* dot11RTSSuccessCount are updated in interrupt time.
	323	* dot11FCSErrorCount is updated in the link tuner.
	324	*/
	325	memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
	326
	327	return 0;
	328	}
	329	EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
	330
	331	int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
	332	struct ieee80211_tx_queue_stats *stats)
	333	{
	334	struct rt2x00_dev *rt2x00dev = hw->priv;
	335	unsigned int i;
	336
	337	for (i = 0; i < hw->queues; i++)
	338	memcpy(&stats->data[i], &rt2x00dev->tx[i].stats,
	339	sizeof(rt2x00dev->tx[i].stats));
	340
	341	return 0;
	342	}
	343	EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);
	344
471b3efd JB	345	void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
	346	struct ieee80211_vif *vif,
	347	struct ieee80211_bss_conf *bss_conf,
	348	u32 changes)
5c58ee51 ID	349	{
	350	struct rt2x00_dev *rt2x00dev = hw->priv;
	351	int short_preamble;
	352	int ack_timeout;
	353	int ack_consume_time;
	354	int difs;
471b3efd	355	int preamble;
5c58ee51 ID	356
	357	/*
	358	* We only support changing preamble mode.
	359	*/
471b3efd	360	if (!(changes & BSS_CHANGED_ERP_PREAMBLE))
5c58ee51 ID	361	return;
5c58ee51 ID	362
471b3efd JB	363	short_preamble = bss_conf->use_short_preamble;
	364	preamble = bss_conf->use_short_preamble ?
	365	SHORT_PREAMBLE : PREAMBLE;
5c58ee51 ID	366
	367	difs = (hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
	368	SHORT_DIFS : DIFS;
	369	ack_timeout = difs + PLCP + preamble + get_duration(ACK_SIZE, 10);
	370
	371	ack_consume_time = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);
	372
	373	if (short_preamble)
	374	__set_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
	375	else
	376	__clear_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
	377
	378	rt2x00dev->ops->lib->config_preamble(rt2x00dev, short_preamble,
	379	ack_timeout, ack_consume_time);
	380	}
471b3efd	381	EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);
5c58ee51	382
95ea3627 ID	383	int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
	384	const struct ieee80211_tx_queue_params *params)
	385	{
	386	struct rt2x00_dev *rt2x00dev = hw->priv;
	387	struct data_ring *ring;
	388
	389	ring = rt2x00lib_get_ring(rt2x00dev, queue);
	390	if (unlikely(!ring))
	391	return -EINVAL;
	392
	393	/*
	394	* The passed variables are stored as real value ((2^n)-1).
	395	* Ralink registers require to know the bit number 'n'.
	396	*/
	397	if (params->cw_min)
	398	ring->tx_params.cw_min = fls(params->cw_min);
	399	else
	400	ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */
	401
	402	if (params->cw_max)
	403	ring->tx_params.cw_max = fls(params->cw_max);
	404	else
	405	ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */
	406
	407	if (params->aifs)
	408	ring->tx_params.aifs = params->aifs;
	409	else
	410	ring->tx_params.aifs = 2;
	411
	412	INFO(rt2x00dev,
	413	"Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
	414	queue, ring->tx_params.cw_min, ring->tx_params.cw_max,
	415	ring->tx_params.aifs);
	416
	417	return 0;
	418	}
	419	EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);