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

/*
	Copyright (C) 2004 - 2007 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 0;
	}

	/*
	 * 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)
			return NETDEV_TX_BUSY;

		if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control))
			return NETDEV_TX_BUSY;
	}

	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control))
		return NETDEV_TX_BUSY;

	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;
	int status;

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

	/*
	 * If this is the first interface which is added,
	 * we should load the firmware now.
	 */
	if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
		status = rt2x00lib_load_firmware(rt2x00dev);
		if (status)
			return status;
	}

	/*
	 * Initialize the device.
	 */
	status = rt2x00lib_initialize(rt2x00dev);
	if (status)
		return status;

	/*
	 * Enable radio.
	 */
	status = rt2x00lib_enable_radio(rt2x00dev);
	if (status) {
		rt2x00lib_uninitialize(rt2x00dev);
		return status;
	}

	__set_bit(DEVICE_STARTED, &rt2x00dev->flags);

	return 0;
}
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;

	/*
	 * Perhaps we can add something smarter here,
	 * but for now just disabling the radio should do.
	 */
	rt2x00lib_disable_radio(rt2x00dev);

	__clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
}
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->if_id;
	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, int if_id,
			       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_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
			      int cts_protection, int preamble)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	int short_preamble;
	int ack_timeout;
	int ack_consume_time;
	int difs;

	/*
	 * We only support changing preamble mode.
	 */
	if (!(changes & IEEE80211_ERP_CHANGE_PREAMBLE))
		return;

	short_preamble = !preamble;
	preamble = !!(preamble) ? PREAMBLE : SHORT_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_erp_ie_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 ID	1	/*
	2	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
	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);
	87	return 0;
	88	}
	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))) {
	113	if (rt2x00_ring_free(ring) <= 1)
	114	return NETDEV_TX_BUSY;
	115
	116	if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control))
	117	return NETDEV_TX_BUSY;
	118	}
	119
	120	if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control))
	121	return NETDEV_TX_BUSY;
	122
	123	if (rt2x00dev->ops->lib->kick_tx_queue)
	124	rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
	125
	126	return NETDEV_TX_OK;
	127	}
	128	EXPORT_SYMBOL_GPL(rt2x00mac_tx);
	129
	130	int rt2x00mac_start(struct ieee80211_hw *hw)
	131	{
	132	struct rt2x00_dev *rt2x00dev = hw->priv;
	133	int status;
	134
066cb637 ID	135	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) \|\|
066cb637 ID	136	test_bit(DEVICE_STARTED, &rt2x00dev->flags))
95ea3627 ID	137	return 0;
	138
	139	/*
	140	* If this is the first interface which is added,
	141	* we should load the firmware now.
	142	*/
066cb637	143	if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
95ea3627 ID	144	status = rt2x00lib_load_firmware(rt2x00dev);
	145	if (status)
	146	return status;
	147	}
	148
	149	/*
	150	* Initialize the device.
	151	*/
	152	status = rt2x00lib_initialize(rt2x00dev);
	153	if (status)
	154	return status;
	155
	156	/*
	157	* Enable radio.
	158	*/
	159	status = rt2x00lib_enable_radio(rt2x00dev);
	160	if (status) {
	161	rt2x00lib_uninitialize(rt2x00dev);
	162	return status;
	163	}
	164
066cb637 ID	165	__set_bit(DEVICE_STARTED, &rt2x00dev->flags);
066cb637 ID	166
95ea3627 ID	167	return 0;
	168	}
	169	EXPORT_SYMBOL_GPL(rt2x00mac_start);
	170
	171	void rt2x00mac_stop(struct ieee80211_hw *hw)
	172	{
	173	struct rt2x00_dev *rt2x00dev = hw->priv;
	174
066cb637 ID	175	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
	176	return;
	177
95ea3627 ID	178	/*
	179	* Perhaps we can add something smarter here,
	180	* but for now just disabling the radio should do.
	181	*/
	182	rt2x00lib_disable_radio(rt2x00dev);
066cb637 ID	183
066cb637 ID	184	__clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
95ea3627 ID	185	}
	186	EXPORT_SYMBOL_GPL(rt2x00mac_stop);
	187
	188	int rt2x00mac_add_interface(struct ieee80211_hw *hw,
	189	struct ieee80211_if_init_conf *conf)
	190	{
	191	struct rt2x00_dev *rt2x00dev = hw->priv;
	192	struct interface *intf = &rt2x00dev->interface;
95ea3627	193
453a3fb9 ID	194	/* FIXME: Beaconing is broken in rt2x00. */
	195	if (conf->type == IEEE80211_IF_TYPE_IBSS \|\|
	196	conf->type == IEEE80211_IF_TYPE_AP) {
	197	ERROR(rt2x00dev,
	198	"rt2x00 does not support Adhoc or Master mode");
	199	return -EOPNOTSUPP;
	200	}
	201
95ea3627	202	/*
066cb637 ID	203	* Don't allow interfaces to be added while
	204	* either the device has disappeared or when
	205	* another interface is already present.
95ea3627	206	*/
066cb637 ID	207	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) \|\|
066cb637 ID	208	is_interface_present(intf))
95ea3627 ID	209	return -ENOBUFS;
95ea3627 ID	210
4150c572 JB	211	intf->id = conf->if_id;
	212	intf->type = conf->type;
	213	if (conf->type == IEEE80211_IF_TYPE_AP)
	214	memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
	215	memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);
95ea3627 ID	216
95ea3627 ID	217	/*
95ea3627	218	* The MAC adddress must be configured after the device
4150c572 JB	219	* has been initialized. Otherwise the device can reset
4150c572 JB	220	* the MAC registers.
95ea3627 ID	221	*/
	222	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	223	rt2x00lib_config_type(rt2x00dev, conf->type);
95ea3627 ID	224
	225	return 0;
	226	}
	227	EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
	228
	229	void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
	230	struct ieee80211_if_init_conf *conf)
	231	{
	232	struct rt2x00_dev *rt2x00dev = hw->priv;
	233	struct interface *intf = &rt2x00dev->interface;
	234
	235	/*
066cb637 ID	236	* Don't allow interfaces to be remove while
	237	* either the device has disappeared or when
	238	* no interface is present.
95ea3627	239	*/
066cb637 ID	240	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) \|\|
066cb637 ID	241	!is_interface_present(intf))
95ea3627 ID	242	return;
95ea3627 ID	243
4150c572	244	intf->id = 0;
d28c2561	245	intf->type = IEEE80211_IF_TYPE_INVALID;
4150c572 JB	246	memset(&intf->bssid, 0x00, ETH_ALEN);
4150c572 JB	247	memset(&intf->mac, 0x00, ETH_ALEN);
95ea3627 ID	248
	249	/*
	250	* Make sure the bssid and mac address registers
	251	* are cleared to prevent false ACKing of frames.
	252	*/
	253	rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
	254	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
	255	rt2x00lib_config_type(rt2x00dev, intf->type);
95ea3627 ID	256	}
	257	EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
	258
	259	int rt2x00mac_config(struct ieee80211_hw hw, struct ieee80211_conf conf)
	260	{
	261	struct rt2x00_dev *rt2x00dev = hw->priv;
	262
	263	/*
066cb637 ID	264	* Mac80211 might be calling this function while we are trying
066cb637 ID	265	* to remove the device or perhaps suspending it.
95ea3627	266	*/
066cb637	267	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
95ea3627 ID	268	return 0;
	269
	270	/*
	271	* Check if we need to disable the radio,
	272	* if this is not the case, at least the RX must be disabled.
	273	*/
	274	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) {
	275	if (!conf->radio_enabled)
	276	rt2x00lib_disable_radio(rt2x00dev);
	277	else
5cbf830e	278	rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
95ea3627 ID	279	}
95ea3627 ID	280
066cb637	281	rt2x00lib_config(rt2x00dev, conf, 0);
95ea3627	282
95ea3627 ID	283	/*
	284	* Reenable RX only if the radio should be on.
	285	*/
	286	if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
5cbf830e	287	rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
95ea3627 ID	288	else if (conf->radio_enabled)
	289	return rt2x00lib_enable_radio(rt2x00dev);
	290
	291	return 0;
	292	}
	293	EXPORT_SYMBOL_GPL(rt2x00mac_config);
	294
	295	int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id,
	296	struct ieee80211_if_conf *conf)
	297	{
	298	struct rt2x00_dev *rt2x00dev = hw->priv;
	299	struct interface *intf = &rt2x00dev->interface;
	300	int status;
	301
	302	/*
066cb637 ID	303	* Mac80211 might be calling this function while we are trying
066cb637 ID	304	* to remove the device or perhaps suspending it.
95ea3627	305	*/
066cb637	306	if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
95ea3627 ID	307	return 0;
	308
	309	/*
95ea3627 ID	310	* If the given type does not match the configured type,
	311	* there has been a problem.
	312	*/
4150c572	313	if (conf->type != intf->type)
95ea3627 ID	314	return -EINVAL;
	315
	316	/*
	317	* If the interface does not work in master mode,
	318	* then the bssid value in the interface structure
	319	* should now be set.
	320	*/
	321	if (conf->type != IEEE80211_IF_TYPE_AP)
	322	memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
	323	rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
	324
	325	/*
	326	* We only need to initialize the beacon when master mode is enabled.
	327	*/
	328	if (conf->type != IEEE80211_IF_TYPE_AP \|\| !conf->beacon)
	329	return 0;
	330
	331	status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
	332	conf->beacon,
	333	conf->beacon_control);
	334	if (status)
	335	dev_kfree_skb(conf->beacon);
	336
	337	return status;
	338	}
	339	EXPORT_SYMBOL_GPL(rt2x00mac_config_interface);
	340
95ea3627 ID	341	int rt2x00mac_get_stats(struct ieee80211_hw *hw,
	342	struct ieee80211_low_level_stats *stats)
	343	{
	344	struct rt2x00_dev *rt2x00dev = hw->priv;
	345
	346	/*
	347	* The dot11ACKFailureCount, dot11RTSFailureCount and
	348	* dot11RTSSuccessCount are updated in interrupt time.
	349	* dot11FCSErrorCount is updated in the link tuner.
	350	*/
	351	memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
	352
	353	return 0;
	354	}
	355	EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
	356
	357	int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
	358	struct ieee80211_tx_queue_stats *stats)
	359	{
	360	struct rt2x00_dev *rt2x00dev = hw->priv;
	361	unsigned int i;
	362
	363	for (i = 0; i < hw->queues; i++)
	364	memcpy(&stats->data[i], &rt2x00dev->tx[i].stats,
	365	sizeof(rt2x00dev->tx[i].stats));
	366
	367	return 0;
	368	}
	369	EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);
	370
5c58ee51 ID	371	void rt2x00mac_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
	372	int cts_protection, int preamble)
	373	{
	374	struct rt2x00_dev *rt2x00dev = hw->priv;
	375	int short_preamble;
	376	int ack_timeout;
	377	int ack_consume_time;
	378	int difs;
	379
	380	/*
	381	* We only support changing preamble mode.
	382	*/
	383	if (!(changes & IEEE80211_ERP_CHANGE_PREAMBLE))
	384	return;
	385
	386	short_preamble = !preamble;
	387	preamble = !!(preamble) ? PREAMBLE : SHORT_PREAMBLE;
	388
	389	difs = (hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
	390	SHORT_DIFS : DIFS;
	391	ack_timeout = difs + PLCP + preamble + get_duration(ACK_SIZE, 10);
	392
	393	ack_consume_time = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);
	394
	395	if (short_preamble)
	396	__set_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
	397	else
	398	__clear_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
	399
	400	rt2x00dev->ops->lib->config_preamble(rt2x00dev, short_preamble,
	401	ack_timeout, ack_consume_time);
	402	}
	403	EXPORT_SYMBOL_GPL(rt2x00mac_erp_ie_changed);
	404
95ea3627 ID	405	int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
	406	const struct ieee80211_tx_queue_params *params)
	407	{
	408	struct rt2x00_dev *rt2x00dev = hw->priv;
	409	struct data_ring *ring;
	410
	411	ring = rt2x00lib_get_ring(rt2x00dev, queue);
	412	if (unlikely(!ring))
	413	return -EINVAL;
	414
	415	/*
	416	* The passed variables are stored as real value ((2^n)-1).
	417	* Ralink registers require to know the bit number 'n'.
	418	*/
	419	if (params->cw_min)
	420	ring->tx_params.cw_min = fls(params->cw_min);
	421	else
	422	ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */
	423
	424	if (params->cw_max)
	425	ring->tx_params.cw_max = fls(params->cw_max);
	426	else
	427	ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */
	428
	429	if (params->aifs)
	430	ring->tx_params.aifs = params->aifs;
	431	else
	432	ring->tx_params.aifs = 2;
	433
	434	INFO(rt2x00dev,
	435	"Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n",
	436	queue, ring->tx_params.cw_min, ring->tx_params.cw_max,
	437	ring->tx_params.aifs);
	438
	439	return 0;
	440	}
	441	EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);