/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (c) 2003 Evgeniy Polyakov <[email protected]> */ #ifndef __W1_NETLINK_H #define __W1_NETLINK_H #include <asm/types.h> #include <linux/connector.h> #include "w1_internal.h" /** * enum w1_cn_msg_flags - bitfield flags for struct cn_msg.flags * * @W1_CN_BUNDLE: Request bundling replies into fewer messagse. Be prepared * to handle multiple struct cn_msg, struct w1_netlink_msg, and * struct w1_netlink_cmd in one packet. */ enum w1_cn_msg_flags { … }; /** * enum w1_netlink_message_types - message type * * @W1_SLAVE_ADD: notification that a slave device was added * @W1_SLAVE_REMOVE: notification that a slave device was removed * @W1_MASTER_ADD: notification that a new bus master was added * @W1_MASTER_REMOVE: notification that a bus masterwas removed * @W1_MASTER_CMD: initiate operations on a specific master * @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch * operation * @W1_LIST_MASTERS: used to determine the bus master identifiers */ enum w1_netlink_message_types { … }; /** * struct w1_netlink_msg - holds w1 message type, id, and result * * @type: one of enum w1_netlink_message_types * @status: kernel feedback for success 0 or errno failure value * @len: length of data following w1_netlink_msg * @id: union holding bus master id (msg.id) and slave device id (id[8]). * @id.id: Slave ID (8 bytes) * @id.mst: bus master identification * @id.mst.id: bus master ID * @id.mst.res: bus master reserved * @data: start address of any following data * * The base message structure for w1 messages over netlink. * The netlink connector data sequence is, struct nlmsghdr, struct cn_msg, * then one or more struct w1_netlink_msg (each with optional data). */ struct w1_netlink_msg { … }; /** * enum w1_commands - commands available for master or slave operations * * @W1_CMD_READ: read len bytes * @W1_CMD_WRITE: write len bytes * @W1_CMD_SEARCH: initiate a standard search, returns only the slave * devices found during that search * @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming * @W1_CMD_TOUCH: Touches a series of bytes. * @W1_CMD_RESET: sends a bus reset on the given master * @W1_CMD_SLAVE_ADD: adds a slave to the given master, * 8 byte slave id at data[0] * @W1_CMD_SLAVE_REMOVE: removes a slave to the given master, * 8 byte slave id at data[0] * @W1_CMD_LIST_SLAVES: list of slaves registered on this master * @W1_CMD_MAX: number of available commands */ enum w1_commands { … }; /** * struct w1_netlink_cmd - holds the command and data * * @cmd: one of enum w1_commands * @res: reserved * @len: length of data following w1_netlink_cmd * @data: start address of any following data * * One or more struct w1_netlink_cmd is placed starting at w1_netlink_msg.data * each with optional data. */ struct w1_netlink_cmd { … }; #ifdef __KERNEL__ void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *); int w1_init_netlink(void); void w1_fini_netlink(void); #endif /* __KERNEL__ */ #endif /* __W1_NETLINK_H */
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