include/uapi/linux/stm.h

   1 /*
   2  * System Trace Module (STM) userspace interfaces
   3  * Copyright (c) 2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * STM class implements generic infrastructure for  System Trace Module devices
  15  * as defined in MIPI STPv2 specification.
  16  */
  17
  18 #ifndef _UAPI_LINUX_STM_H
  19 #define _UAPI_LINUX_STM_H
  20
  21 #include <linux/types.h>
  22
  23 /**
  24  * struct stp_policy_id - identification for the STP policy
  25  * @size:       size of the structure including real id[] length
  26  * @master:     assigned master
  27  * @channel:    first assigned channel
  28  * @width:      number of requested channels
  29  * @id:         identification string
  30  *
  31  * User must calculate the total size of the structure and put it into
  32  * @size field, fill out the @id and desired @width. In return, kernel
  33  * fills out @master, @channel and @width.
  34  */
  35 struct stp_policy_id {
  36         __u32           size;
  37         __u16           master;
  38         __u16           channel;
  39         __u16           width;
  40         /* padding */
  41         __u16           __reserved_0;
  42         __u32           __reserved_1;
  43         char            id[0];
  44 };
  45
  46 #define STP_POLICY_ID_SET       _IOWR('%', 0, struct stp_policy_id)
  47 #define STP_POLICY_ID_GET       _IOR('%', 1, struct stp_policy_id)
  48 #define STP_SET_OPTIONS         _IOW('%', 2, __u64)
  49
  50 #endif /* _UAPI_LINUX_STM_H */