| Carl van Schaik | 2f4ca29 | 2018-06-12 01:46:33 +1000 | [diff] [blame] | 1 | /* |
| 2 | * User-visible interface to driver for inter-cell links using the |
| 3 | * shared-buffer transport. |
| 4 | * |
| 5 | * Copyright (c) 2016 Cog Systems Pty Ltd. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | */ |
| 13 | #ifndef _LINUX_OKL4_LINK_SHBUF_H |
| 14 | #define _LINUX_OKL4_LINK_SHBUF_H |
| 15 | |
| 16 | #include <linux/ioctl.h> |
| 17 | #include <linux/types.h> |
| 18 | |
| 19 | /* |
| 20 | * Ioctl that indicates a request to raise the outgoing vIRQ. This value is |
| 21 | * chosen to avoid conflict with the numbers documented in Linux 4.1's |
| 22 | * ioctl-numbers.txt. The argument is a payload to transmit to the receiver. |
| 23 | * Note that consecutive transmissions without an interleaved clear of the |
| 24 | * interrupt results in the payloads being ORed together. |
| 25 | */ |
| 26 | #define OKL4_LINK_SHBUF_IOCTL_IRQ_TX _IOW(0x8d, 1, __u64) |
| 27 | |
| 28 | /* |
| 29 | * Ioctl that indicates a request to clear any pending incoming vIRQ. The value |
| 30 | * returned through the argument to the ioctl is the payload, which is also |
| 31 | * cleared. |
| 32 | * |
| 33 | * The caller cannot distinguish between the cases of no pending interrupt and |
| 34 | * a pending interrupt with payload 0. It is expected that the caller is |
| 35 | * communicating with a cooperative sender and has polled their file descriptor |
| 36 | * to determine there is a pending interrupt before using this ioctl. |
| 37 | */ |
| 38 | #define OKL4_LINK_SHBUF_IOCTL_IRQ_CLR _IOR(0x8d, 2, __u64) |
| 39 | |
| 40 | #endif /* _LINUX_OKL4_LINK_SHBUF_H */ |