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/*
* Copyright 2010 Tilera Corporation. All Rights Reserved.
*
* 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 in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*
* This header defines a wrapper interface for managing hypervisor
* device calls that will result in an interrupt at some later time.
* In particular, this provides wrappers for hv_preada() and
* hv_pwritea().
*/
#ifndef _ASM_TILE_HV_DRIVER_H
#define _ASM_TILE_HV_DRIVER_H
#include <hv/hypervisor.h>
struct hv_driver_cb;
/* A callback to be invoked when an operation completes. */
typedef void hv_driver_callback_t(struct hv_driver_cb *cb, __hv32 result);
/*
* A structure to hold information about an outstanding call.
* The driver must allocate a separate structure for each call.
*/
struct hv_driver_cb {
hv_driver_callback_t *callback; /* Function to call on interrupt. */
void *dev; /* Driver-specific state variable. */
};
/* Wrapper for invoking hv_dev_preada(). */
static inline int
tile_hv_dev_preada(int devhdl, __hv32 flags, __hv32 sgl_len,
HV_SGL sgl[/* sgl_len */], __hv64 offset,
struct hv_driver_cb *callback)
{
return hv_dev_preada(devhdl, flags, sgl_len, sgl,
offset, (HV_IntArg)callback);
}
/* Wrapper for invoking hv_dev_pwritea(). */
static inline int
tile_hv_dev_pwritea(int devhdl, __hv32 flags, __hv32 sgl_len,
HV_SGL sgl[/* sgl_len */], __hv64 offset,
struct hv_driver_cb *callback)
{
return hv_dev_pwritea(devhdl, flags, sgl_len, sgl,
offset, (HV_IntArg)callback);
}
#endif /* _ASM_TILE_HV_DRIVER_H */