[mirror_ubuntu-artful-kernel.git] / include / linux / irqchip / chained_irq.h

/*
 * Chained IRQ handlers support.
 *
 * Copyright (C) 2011 ARM Ltd.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __IRQCHIP_CHAINED_IRQ_H
#define __IRQCHIP_CHAINED_IRQ_H

#include <linux/irq.h>

/*
 * Entry/exit functions for chained handlers where the primary IRQ chip
 * may implement either fasteoi or level-trigger flow control.
 */
static inline void chained_irq_enter(struct irq_chip *chip,
				     struct irq_desc *desc)
{
	/* FastEOI controllers require no action on entry. */
	if (chip->irq_eoi)
		return;

	if (chip->irq_mask_ack) {
		chip->irq_mask_ack(&desc->irq_data);
	} else {
		chip->irq_mask(&desc->irq_data);
		if (chip->irq_ack)
			chip->irq_ack(&desc->irq_data);
	}
}

static inline void chained_irq_exit(struct irq_chip *chip,
				    struct irq_desc *desc)
{
	if (chip->irq_eoi)
		chip->irq_eoi(&desc->irq_data);
	else
		chip->irq_unmask(&desc->irq_data);
}

#endif /* __IRQCHIP_CHAINED_IRQ_H */
Commit	Line	Data
de88cbb7 CM	1	/*
	2	* Chained IRQ handlers support.
	3	*
	4	* Copyright (C) 2011 ARM Ltd.
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	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, see <http://www.gnu.org/licenses/>.
	17	*/
	18	#ifndef __IRQCHIP_CHAINED_IRQ_H
	19	#define __IRQCHIP_CHAINED_IRQ_H
	20
	21	#include <linux/irq.h>
	22
	23	/*
	24	* Entry/exit functions for chained handlers where the primary IRQ chip
	25	* may implement either fasteoi or level-trigger flow control.
	26	*/
	27	static inline void chained_irq_enter(struct irq_chip *chip,
	28	struct irq_desc *desc)
	29	{
	30	/* FastEOI controllers require no action on entry. */
	31	if (chip->irq_eoi)
	32	return;
	33
	34	if (chip->irq_mask_ack) {
	35	chip->irq_mask_ack(&desc->irq_data);
	36	} else {
	37	chip->irq_mask(&desc->irq_data);
	38	if (chip->irq_ack)
	39	chip->irq_ack(&desc->irq_data);
	40	}
	41	}
	42
	43	static inline void chained_irq_exit(struct irq_chip *chip,
	44	struct irq_desc *desc)
	45	{
	46	if (chip->irq_eoi)
	47	chip->irq_eoi(&desc->irq_data);
	48	else
	49	chip->irq_unmask(&desc->irq_data);
	50	}
	51
	52	#endif /* __IRQCHIP_CHAINED_IRQ_H */