/*
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* Keystone Navigator Queue Management Sub-System header
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
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* Author: Sandeep Nair <sandeep_n@ti.com>
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __SOC_TI_KNAV_QMSS_H__
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#define __SOC_TI_KNAV_QMSS_H__
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#include <linux/err.h>
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#include <linux/time.h>
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#include <linux/atomic.h>
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#include <linux/device.h>
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#include <linux/fcntl.h>
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#include <linux/dma-mapping.h>
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/* queue types */
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#define KNAV_QUEUE_QPEND ((unsigned)-2) /* interruptible qpend queue */
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#define KNAV_QUEUE_ACC ((unsigned)-3) /* Accumulated queue */
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#define KNAV_QUEUE_GP ((unsigned)-4) /* General purpose queue */
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/* queue flags */
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#define KNAV_QUEUE_SHARED 0x0001 /* Queue can be shared */
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/**
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* enum knav_queue_ctrl_cmd - queue operations.
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* @KNAV_QUEUE_GET_ID: Get the ID number for an open queue
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* @KNAV_QUEUE_FLUSH: forcibly empty a queue if possible
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* @KNAV_QUEUE_SET_NOTIFIER: Set a notifier callback to a queue handle.
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* @KNAV_QUEUE_ENABLE_NOTIFY: Enable notifier callback for a queue handle.
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* @KNAV_QUEUE_DISABLE_NOTIFY: Disable notifier callback for a queue handle.
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* @KNAV_QUEUE_GET_COUNT: Get number of queues.
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*/
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enum knav_queue_ctrl_cmd {
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KNAV_QUEUE_GET_ID,
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KNAV_QUEUE_FLUSH,
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KNAV_QUEUE_SET_NOTIFIER,
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KNAV_QUEUE_ENABLE_NOTIFY,
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KNAV_QUEUE_DISABLE_NOTIFY,
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KNAV_QUEUE_GET_COUNT
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};
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/* Queue notifier callback prototype */
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typedef void (*knav_queue_notify_fn)(void *arg);
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/**
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* struct knav_queue_notify_config: Notifier configuration
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* @fn: Notifier function
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* @fn_arg: Notifier function arguments
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*/
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struct knav_queue_notify_config {
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knav_queue_notify_fn fn;
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void *fn_arg;
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};
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void *knav_queue_open(const char *name, unsigned id,
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unsigned flags);
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void knav_queue_close(void *qhandle);
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int knav_queue_device_control(void *qhandle,
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enum knav_queue_ctrl_cmd cmd,
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unsigned long arg);
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dma_addr_t knav_queue_pop(void *qhandle, unsigned *size);
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int knav_queue_push(void *qhandle, dma_addr_t dma,
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unsigned size, unsigned flags);
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void *knav_pool_create(const char *name,
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int num_desc, int region_id);
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void knav_pool_destroy(void *ph);
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int knav_pool_count(void *ph);
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void *knav_pool_desc_get(void *ph);
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void knav_pool_desc_put(void *ph, void *desc);
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int knav_pool_desc_map(void *ph, void *desc, unsigned size,
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dma_addr_t *dma, unsigned *dma_sz);
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void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz);
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dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt);
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void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma);
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bool knav_qmss_device_ready(void);
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#endif /* __SOC_TI_KNAV_QMSS_H__ */
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