cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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w1_netlink.h (3625B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copyright (c) 2003 Evgeniy Polyakov <zbr@ioremap.net>
      4 */
      5
      6#ifndef __W1_NETLINK_H
      7#define __W1_NETLINK_H
      8
      9#include <asm/types.h>
     10#include <linux/connector.h>
     11
     12#include "w1_internal.h"
     13
     14/**
     15 * enum w1_cn_msg_flags - bitfield flags for struct cn_msg.flags
     16 *
     17 * @W1_CN_BUNDLE: Request bundling replies into fewer messagse.  Be prepared
     18 * to handle multiple struct cn_msg, struct w1_netlink_msg, and
     19 * struct w1_netlink_cmd in one packet.
     20 */
     21enum w1_cn_msg_flags {
     22	W1_CN_BUNDLE = 1,
     23};
     24
     25/**
     26 * enum w1_netlink_message_types - message type
     27 *
     28 * @W1_SLAVE_ADD: notification that a slave device was added
     29 * @W1_SLAVE_REMOVE: notification that a slave device was removed
     30 * @W1_MASTER_ADD: notification that a new bus master was added
     31 * @W1_MASTER_REMOVE: notification that a bus masterwas removed
     32 * @W1_MASTER_CMD: initiate operations on a specific master
     33 * @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch
     34 * operation
     35 * @W1_LIST_MASTERS: used to determine the bus master identifiers
     36 */
     37enum w1_netlink_message_types {
     38	W1_SLAVE_ADD = 0,
     39	W1_SLAVE_REMOVE,
     40	W1_MASTER_ADD,
     41	W1_MASTER_REMOVE,
     42	W1_MASTER_CMD,
     43	W1_SLAVE_CMD,
     44	W1_LIST_MASTERS,
     45};
     46
     47/**
     48 * struct w1_netlink_msg - holds w1 message type, id, and result
     49 *
     50 * @type: one of enum w1_netlink_message_types
     51 * @status: kernel feedback for success 0 or errno failure value
     52 * @len: length of data following w1_netlink_msg
     53 * @id: union holding bus master id (msg.id) and slave device id (id[8]).
     54 * @id.id: Slave ID (8 bytes)
     55 * @id.mst: bus master identification
     56 * @id.mst.id: bus master ID
     57 * @id.mst.res: bus master reserved
     58 * @data: start address of any following data
     59 *
     60 * The base message structure for w1 messages over netlink.
     61 * The netlink connector data sequence is, struct nlmsghdr, struct cn_msg,
     62 * then one or more struct w1_netlink_msg (each with optional data).
     63 */
     64struct w1_netlink_msg
     65{
     66	__u8				type;
     67	__u8				status;
     68	__u16				len;
     69	union {
     70		__u8			id[8];
     71		struct w1_mst {
     72			__u32		id;
     73			__u32		res;
     74		} mst;
     75	} id;
     76	__u8				data[];
     77};
     78
     79/**
     80 * enum w1_commands - commands available for master or slave operations
     81 *
     82 * @W1_CMD_READ: read len bytes
     83 * @W1_CMD_WRITE: write len bytes
     84 * @W1_CMD_SEARCH: initiate a standard search, returns only the slave
     85 * devices found during that search
     86 * @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming
     87 * @W1_CMD_TOUCH: Touches a series of bytes.
     88 * @W1_CMD_RESET: sends a bus reset on the given master
     89 * @W1_CMD_SLAVE_ADD: adds a slave to the given master,
     90 * 8 byte slave id at data[0]
     91 * @W1_CMD_SLAVE_REMOVE: removes a slave to the given master,
     92 * 8 byte slave id at data[0]
     93 * @W1_CMD_LIST_SLAVES: list of slaves registered on this master
     94 * @W1_CMD_MAX: number of available commands
     95 */
     96enum w1_commands {
     97	W1_CMD_READ = 0,
     98	W1_CMD_WRITE,
     99	W1_CMD_SEARCH,
    100	W1_CMD_ALARM_SEARCH,
    101	W1_CMD_TOUCH,
    102	W1_CMD_RESET,
    103	W1_CMD_SLAVE_ADD,
    104	W1_CMD_SLAVE_REMOVE,
    105	W1_CMD_LIST_SLAVES,
    106	W1_CMD_MAX
    107};
    108
    109/**
    110 * struct w1_netlink_cmd - holds the command and data
    111 *
    112 * @cmd: one of enum w1_commands
    113 * @res: reserved
    114 * @len: length of data following w1_netlink_cmd
    115 * @data: start address of any following data
    116 *
    117 * One or more struct w1_netlink_cmd is placed starting at w1_netlink_msg.data
    118 * each with optional data.
    119 */
    120struct w1_netlink_cmd
    121{
    122	__u8				cmd;
    123	__u8				res;
    124	__u16				len;
    125	__u8				data[];
    126};
    127
    128#ifdef __KERNEL__
    129
    130void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *);
    131int w1_init_netlink(void);
    132void w1_fini_netlink(void);
    133
    134#endif /* __KERNEL__ */
    135#endif /* __W1_NETLINK_H */