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/*
* Keystone Navigator Queue Management Sub-System header
*
* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
* Author: Sandeep Nair <[email protected]>
* Cyril Chemparathy <[email protected]>
* Santosh Shilimkar <[email protected]>
*
* 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);
bool knav_qmss_device_ready(void);
#endif /* __SOC_TI_KNAV_QMSS_H__ */
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