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8ceb0ea6d8
A simple driver for using a shared-memory bridge between two VMs. Change-Id: I3dac6dd88d1f658c95e799262a9720a44af00291 Signed-off-by: Carl van Schaik <carl@cog.systems> Git-commit: 18b0192bb16d90974af0401f1a46f20f0f5b9502 Git-repo: https://github.com/CogSystems/linux-msm/commits/msm-4.9-hyp [mnalajal@codeaurora: Resolve trivial merge conflicts] Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org> Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/*
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* User-visible interface to driver for inter-cell links using the
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* shared-buffer transport.
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*
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* Copyright (c) 2016 Cog Systems Pty Ltd.
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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
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#ifndef _LINUX_OKL4_LINK_SHBUF_H
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#define _LINUX_OKL4_LINK_SHBUF_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* Ioctl that indicates a request to raise the outgoing vIRQ. This value is
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* chosen to avoid conflict with the numbers documented in Linux 4.1's
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* ioctl-numbers.txt. The argument is a payload to transmit to the receiver.
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* Note that consecutive transmissions without an interleaved clear of the
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* interrupt results in the payloads being ORed together.
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*/
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#define OKL4_LINK_SHBUF_IOCTL_IRQ_TX _IOW(0x8d, 1, __u64)
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/*
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* Ioctl that indicates a request to clear any pending incoming vIRQ. The value
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* returned through the argument to the ioctl is the payload, which is also
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* cleared.
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*
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* The caller cannot distinguish between the cases of no pending interrupt and
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* a pending interrupt with payload 0. It is expected that the caller is
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* communicating with a cooperative sender and has polled their file descriptor
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* to determine there is a pending interrupt before using this ioctl.
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*/
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#define OKL4_LINK_SHBUF_IOCTL_IRQ_CLR _IOR(0x8d, 2, __u64)
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#endif /* _LINUX_OKL4_LINK_SHBUF_H */
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