[linux-2.6-block.git] / net / mac802154 / util.c

/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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.
 *
 * Authors:
 * Alexander Aring <aar@pengutronix.de>
 *
 * Based on: net/mac80211/util.c
 */

#include "ieee802154_i.h"
#include "driver-ops.h"

/* privid for wpan_phys to determine whether they belong to us or not */
const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;

void ieee802154_wake_queue(struct ieee802154_hw *hw)
{
	struct ieee802154_local *local = hw_to_local(hw);
	struct ieee802154_sub_if_data *sdata;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (!sdata->dev)
			continue;

		netif_wake_queue(sdata->dev);
	}
	rcu_read_unlock();
}
EXPORT_SYMBOL(ieee802154_wake_queue);

void ieee802154_stop_queue(struct ieee802154_hw *hw)
{
	struct ieee802154_local *local = hw_to_local(hw);
	struct ieee802154_sub_if_data *sdata;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (!sdata->dev)
			continue;

		netif_stop_queue(sdata->dev);
	}
	rcu_read_unlock();
}
EXPORT_SYMBOL(ieee802154_stop_queue);

enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
{
	struct ieee802154_local *local =
		container_of(timer, struct ieee802154_local, ifs_timer);

	ieee802154_wake_queue(&local->hw);

	return HRTIMER_NORESTART;
}

void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
			      bool ifs_handling)
{
	if (ifs_handling) {
		struct ieee802154_local *local = hw_to_local(hw);
		u8 max_sifs_size;

		/* If transceiver sets CRC on his own we need to use lifs
		 * threshold len above 16 otherwise 18, because it's not
		 * part of skb->len.
		 */
		if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
					IEEE802154_FCS_LEN;
		else
			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;

		if (skb->len > max_sifs_size)
			hrtimer_start(&local->ifs_timer,
				      ktime_set(0, hw->phy->lifs_period * NSEC_PER_USEC),
				      HRTIMER_MODE_REL);
		else
			hrtimer_start(&local->ifs_timer,
				      ktime_set(0, hw->phy->sifs_period * NSEC_PER_USEC),
				      HRTIMER_MODE_REL);
	} else {
		ieee802154_wake_queue(hw);
	}

	dev_consume_skb_any(skb);
}
EXPORT_SYMBOL(ieee802154_xmit_complete);

void ieee802154_stop_device(struct ieee802154_local *local)
{
	flush_workqueue(local->workqueue);
	hrtimer_cancel(&local->ifs_timer);
	drv_stop(local);
}
Commit	Line	Data
c2085103 AA	1	/* This program is free software; you can redistribute it and/or modify
	2	* it under the terms of the GNU General Public License version 2
	3	* as published by the Free Software Foundation.
	4	*
	5	* This program is distributed in the hope that it will be useful,
	6	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	7	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	8	* GNU General Public License for more details.
	9	*
	10	* Authors:
	11	* Alexander Aring <aar@pengutronix.de>
	12	*
	13	* Based on: net/mac80211/util.c
	14	*/
	15
	16	#include "ieee802154_i.h"
c4227c8a	17	#include "driver-ops.h"
c2085103	18
6322d50d AA	19	/* privid for wpan_phys to determine whether they belong to us or not */
	20	const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
	21
c2085103 AA	22	void ieee802154_wake_queue(struct ieee802154_hw *hw)
	23	{
	24	struct ieee802154_local *local = hw_to_local(hw);
	25	struct ieee802154_sub_if_data *sdata;
	26
	27	rcu_read_lock();
	28	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
	29	if (!sdata->dev)
	30	continue;
	31
	32	netif_wake_queue(sdata->dev);
	33	}
	34	rcu_read_unlock();
	35	}
	36	EXPORT_SYMBOL(ieee802154_wake_queue);
	37
	38	void ieee802154_stop_queue(struct ieee802154_hw *hw)
	39	{
	40	struct ieee802154_local *local = hw_to_local(hw);
	41	struct ieee802154_sub_if_data *sdata;
	42
	43	rcu_read_lock();
	44	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
	45	if (!sdata->dev)
	46	continue;
	47
	48	netif_stop_queue(sdata->dev);
	49	}
	50	rcu_read_unlock();
	51	}
	52	EXPORT_SYMBOL(ieee802154_stop_queue);
	53
61f2dcba	54	enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
c2085103	55	{
61f2dcba AA	56	struct ieee802154_local *local =
	57	container_of(timer, struct ieee802154_local, ifs_timer);
	58
	59	ieee802154_wake_queue(&local->hw);
	60
	61	return HRTIMER_NORESTART;
	62	}
	63
	64	void ieee802154_xmit_complete(struct ieee802154_hw hw, struct sk_buff skb,
	65	bool ifs_handling)
	66	{
	67	if (ifs_handling) {
	68	struct ieee802154_local *local = hw_to_local(hw);
3f3c4bb5	69	u8 max_sifs_size;
61f2dcba	70
3f3c4bb5 AA	71	/* If transceiver sets CRC on his own we need to use lifs
	72	* threshold len above 16 otherwise 18, because it's not
	73	* part of skb->len.
	74	*/
	75	if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
	76	max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
	77	IEEE802154_FCS_LEN;
	78	else
	79	max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
	80
	81	if (skb->len > max_sifs_size)
61f2dcba AA	82	hrtimer_start(&local->ifs_timer,
	83	ktime_set(0, hw->phy->lifs_period * NSEC_PER_USEC),
	84	HRTIMER_MODE_REL);
	85	else
	86	hrtimer_start(&local->ifs_timer,
	87	ktime_set(0, hw->phy->sifs_period * NSEC_PER_USEC),
	88	HRTIMER_MODE_REL);
61f2dcba AA	89	} else {
61f2dcba AA	90	ieee802154_wake_queue(hw);
61f2dcba	91	}
3862eba6 AA	92
3862eba6 AA	93	dev_consume_skb_any(skb);
c2085103 AA	94	}
c2085103 AA	95	EXPORT_SYMBOL(ieee802154_xmit_complete);
c4227c8a AA	96
	97	void ieee802154_stop_device(struct ieee802154_local *local)
	98	{
	99	flush_workqueue(local->workqueue);
	100	hrtimer_cancel(&local->ifs_timer);
	101	drv_stop(local);
	102	}