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