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powerpc/vas: Define VAS_TX_WIN_OPEN ioctl API

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Define the VAS_TX_WIN_OPEN ioctl interface for NX GZIP access
from user space. This interface is used to open GZIP send window and
mmap region which can be used by userspace to send requests to NX
directly with copy/paste instructions.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1587114065.2275.1106.camel@hbabu-laptop
This commit is contained in:
Haren Myneni 2020-04-17 02:01:05 -07:00 committed by Michael Ellerman
parent a8c0c69b5e
commit 45f25a79fe
2 changed files with 23 additions and 0 deletions
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1
Documentation/userspace-api/ioctl/ioctl-number.rst
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@ -286,6 +286,7 @@ Code Seq# Include File Comments
'v' 00-1F linux/fs.h conflict!
'v' 00-0F linux/sonypi.h conflict!
'v' 00-0F media/v4l2-subdev.h conflict!
'v' 20-27 arch/powerpc/include/uapi/asm/vas-api.h VAS API
'v' C0-FF linux/meye.h conflict!
'w' all CERN SCI driver
'y' 00-1F packet based user level communications

22
arch/powerpc/include/uapi/asm/vas-api.h Normal file
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@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* Copyright 2019 IBM Corp.
*/
#ifndef _UAPI_MISC_VAS_H
#define _UAPI_MISC_VAS_H
#include <asm/ioctl.h>
#define VAS_MAGIC 'v'
#define VAS_TX_WIN_OPEN _IOW(VAS_MAGIC, 0x20, struct vas_tx_win_open_attr)
struct vas_tx_win_open_attr {
__u32 version;
__s16 vas_id; /* specific instance of vas or -1 for default */
__u16 reserved1;
__u64 flags; /* Future use */
__u64 reserved2[6];
};
#endif /* _UAPI_MISC_VAS_H */