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Current File : //lib/modules/4.15.0-1044-aws/build/include/linux/soc/ti/knav_qmss.h
/*
 * Keystone Navigator Queue Management Sub-System header
 *
 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
 * Author:	Sandeep Nair <sandeep_n@ti.com>
 *		Cyril Chemparathy <cyril@ti.com>
 *		Santosh Shilimkar <santosh.shilimkar@ti.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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __SOC_TI_KNAV_QMSS_H__
#define __SOC_TI_KNAV_QMSS_H__

#include <linux/err.h>
#include <linux/time.h>
#include <linux/atomic.h>
#include <linux/device.h>
#include <linux/fcntl.h>
#include <linux/dma-mapping.h>

/* queue types */
#define KNAV_QUEUE_QPEND	((unsigned)-2) /* interruptible qpend queue */
#define KNAV_QUEUE_ACC		((unsigned)-3) /* Accumulated queue */
#define KNAV_QUEUE_GP		((unsigned)-4) /* General purpose queue */

/* queue flags */
#define KNAV_QUEUE_SHARED	0x0001		/* Queue can be shared */

/**
 * enum knav_queue_ctrl_cmd -	queue operations.
 * @KNAV_QUEUE_GET_ID:		Get the ID number for an open queue
 * @KNAV_QUEUE_FLUSH:		forcibly empty a queue if possible
 * @KNAV_QUEUE_SET_NOTIFIER:	Set a notifier callback to a queue handle.
 * @KNAV_QUEUE_ENABLE_NOTIFY:	Enable notifier callback for a queue handle.
 * @KNAV_QUEUE_DISABLE_NOTIFY:	Disable notifier callback for a queue handle.
 * @KNAV_QUEUE_GET_COUNT:	Get number of queues.
 */
enum knav_queue_ctrl_cmd {
	KNAV_QUEUE_GET_ID,
	KNAV_QUEUE_FLUSH,
	KNAV_QUEUE_SET_NOTIFIER,
	KNAV_QUEUE_ENABLE_NOTIFY,
	KNAV_QUEUE_DISABLE_NOTIFY,
	KNAV_QUEUE_GET_COUNT
};

/* Queue notifier callback prototype */
typedef void (*knav_queue_notify_fn)(void *arg);

/**
 * struct knav_queue_notify_config:	Notifier configuration
 * @fn:					Notifier function
 * @fn_arg:				Notifier function arguments
 */
struct knav_queue_notify_config {
	knav_queue_notify_fn fn;
	void *fn_arg;
};

void *knav_queue_open(const char *name, unsigned id,
					unsigned flags);
void knav_queue_close(void *qhandle);
int knav_queue_device_control(void *qhandle,
				enum knav_queue_ctrl_cmd cmd,
				unsigned long arg);
dma_addr_t knav_queue_pop(void *qhandle, unsigned *size);
int knav_queue_push(void *qhandle, dma_addr_t dma,
				unsigned size, unsigned flags);

void *knav_pool_create(const char *name,
				int num_desc, int region_id);
void knav_pool_destroy(void *ph);
int knav_pool_count(void *ph);
void *knav_pool_desc_get(void *ph);
void knav_pool_desc_put(void *ph, void *desc);
int knav_pool_desc_map(void *ph, void *desc, unsigned size,
					dma_addr_t *dma, unsigned *dma_sz);
void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz);
dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt);
void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma);

#endif /* __SOC_TI_KNAV_QMSS_H__ */

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