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/*
* User-visible interface to driver for inter-cell links using the
* shared-buffer transport.
*
* Copyright (c) 2016 Cog Systems Pty Ltd.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifndef _LINUX_OKL4_LINK_SHBUF_H
#define _LINUX_OKL4_LINK_SHBUF_H
#include <linux/ioctl.h>
#include <linux/types.h>
/*
* Ioctl that indicates a request to raise the outgoing vIRQ. This value is
* chosen to avoid conflict with the numbers documented in Linux 4.1's
* ioctl-numbers.txt. The argument is a payload to transmit to the receiver.
* Note that consecutive transmissions without an interleaved clear of the
* interrupt results in the payloads being ORed together.
*/
#define OKL4_LINK_SHBUF_IOCTL_IRQ_TX _IOW(0x8d, 1, __u64)
/*
* Ioctl that indicates a request to clear any pending incoming vIRQ. The value
* returned through the argument to the ioctl is the payload, which is also
* cleared.
*
* The caller cannot distinguish between the cases of no pending interrupt and
* a pending interrupt with payload 0. It is expected that the caller is
* communicating with a cooperative sender and has polled their file descriptor
* to determine there is a pending interrupt before using this ioctl.
*/
#define OKL4_LINK_SHBUF_IOCTL_IRQ_CLR _IOR(0x8d, 2, __u64)
#endif /* _LINUX_OKL4_LINK_SHBUF_H */
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