diff options
Diffstat (limited to 'include/uapi/linux/stm.h')
-rw-r--r-- | include/uapi/linux/stm.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/uapi/linux/stm.h b/include/uapi/linux/stm.h new file mode 100644 index 000000000..de3579c2c --- /dev/null +++ b/include/uapi/linux/stm.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * System Trace Module (STM) userspace interfaces + * Copyright (c) 2014, Intel Corporation. + * + * STM class implements generic infrastructure for System Trace Module devices + * as defined in MIPI STPv2 specification. + */ + +#ifndef _UAPI_LINUX_STM_H +#define _UAPI_LINUX_STM_H + +#include <linux/types.h> + +/* Maximum allowed master and channel values */ +#define STP_MASTER_MAX 0xffff +#define STP_CHANNEL_MAX 0xffff + +/** + * struct stp_policy_id - identification for the STP policy + * @size: size of the structure including real id[] length + * @master: assigned master + * @channel: first assigned channel + * @width: number of requested channels + * @id: identification string + * + * User must calculate the total size of the structure and put it into + * @size field, fill out the @id and desired @width. In return, kernel + * fills out @master, @channel and @width. + */ +struct stp_policy_id { + __u32 size; + __u16 master; + __u16 channel; + __u16 width; + /* padding */ + __u16 __reserved_0; + __u32 __reserved_1; + char id[]; +}; + +#define STP_POLICY_ID_SET _IOWR('%', 0, struct stp_policy_id) +#define STP_POLICY_ID_GET _IOR('%', 1, struct stp_policy_id) +#define STP_SET_OPTIONS _IOW('%', 2, __u64) + +#endif /* _UAPI_LINUX_STM_H */ |