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/*
* Copyright 2015 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*
*/
#ifndef _CGS_LINUX_H
#define _CGS_LINUX_H
#include "cgs_common.h"
/**
* cgs_irq_source_set_func() - Callback for enabling/disabling interrupt sources
* @private_data: private data provided to cgs_add_irq_source
* @src_id: interrupt source ID
* @type: interrupt type
* @enabled: 0 = disable source, non-0 = enable source
*
* Return: 0 on success, -errno otherwise
*/
typedef int (*cgs_irq_source_set_func_t)(void *private_data,
unsigned src_id, unsigned type,
int enabled);
/**
* cgs_irq_handler_func() - Interrupt handler callback
* @private_data: private data provided to cgs_add_irq_source
* @src_id: interrupt source ID
* @iv_entry: pointer to raw ih ring entry
*
* This callback runs in interrupt context.
*
* Return: 0 on success, -errno otherwise
*/
typedef int (*cgs_irq_handler_func_t)(void *private_data,
unsigned src_id, const uint32_t *iv_entry);
/**
* cgs_add_irq_source() - Add an IRQ source
* @cgs_device: opaque device handle
* @src_id: interrupt source ID
* @num_types: number of interrupt types that can be independently enabled
* @set: callback function to enable/disable an interrupt type
* @handler: interrupt handler callback
* @private_data: private data to pass to callback functions
*
* The same IRQ source can be added only once. Adding an IRQ source
* indicates ownership of that IRQ source and all its IRQ types.
*
* Return: 0 on success, -errno otherwise
*/
typedef int (*cgs_add_irq_source_t)(struct cgs_device *cgs_device, unsigned src_id,
unsigned num_types,
cgs_irq_source_set_func_t set,
cgs_irq_handler_func_t handler,
void *private_data);
/**
* cgs_irq_get() - Request enabling an IRQ source and type
* @cgs_device: opaque device handle
* @src_id: interrupt source ID
* @type: interrupt type
*
* cgs_irq_get and cgs_irq_put calls must be balanced. They count
* "references" to IRQ sources.
*
* Return: 0 on success, -errno otherwise
*/
typedef int (*cgs_irq_get_t)(struct cgs_device *cgs_device, unsigned src_id, unsigned type);
/**
* cgs_irq_put() - Indicate IRQ source is no longer needed
* @cgs_device: opaque device handle
* @src_id: interrupt source ID
* @type: interrupt type
*
* cgs_irq_get and cgs_irq_put calls must be balanced. They count
* "references" to IRQ sources. Even after cgs_irq_put is called, the
* IRQ handler may still be called if there are more refecences to
* the IRQ source.
*
* Return: 0 on success, -errno otherwise
*/
typedef int (*cgs_irq_put_t)(struct cgs_device *cgs_device, unsigned src_id, unsigned type);
struct cgs_os_ops {
/* IRQ handling */
cgs_add_irq_source_t add_irq_source;
cgs_irq_get_t irq_get;
cgs_irq_put_t irq_put;
};
#define cgs_add_irq_source(dev,src_id,num_types,set,handler,private_data) \
CGS_OS_CALL(add_irq_source,dev,src_id,num_types,set,handler, \
private_data)
#define cgs_irq_get(dev,src_id,type) \
CGS_OS_CALL(irq_get,dev,src_id,type)
#define cgs_irq_put(dev,src_id,type) \
CGS_OS_CALL(irq_put,dev,src_id,type)
#endif /* _CGS_LINUX_H */
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