path: root/include/uapi/linux/ethtool.h

/*
 * ethtool.h: Defines for Linux ethtool.
 *
 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
 * Copyright 2001 Jeff Garzik <jgarzik@pobox.com>
 * Portions Copyright 2001 Sun Microsystems (thockin@sun.com)
 * Portions Copyright 2002 Intel (eli.kupermann@intel.com,
 *                                christopher.leech@intel.com,
 *                                scott.feldman@intel.com)
 * Portions Copyright (C) Sun Microsystems 2008
 */

#ifndef _UAPI_LINUX_ETHTOOL_H
#define _UAPI_LINUX_ETHTOOL_H

#include <linux/types.h>
#include <linux/if_ether.h>

/* All structures exposed to userland should be defined such that they
 * have the same layout for 32-bit and 64-bit userland.
 */

/**
 * struct ethtool_cmd - link control and status
 * @cmd: Command number = %ETHTOOL_GSET or %ETHTOOL_SSET
 * @supported: Bitmask of %SUPPORTED_* flags for the link modes,
 *	physical connectors and other link features for which the
 *	interface supports autonegotiation or auto-detection.
 *	Read-only.
 * @advertising: Bitmask of %ADVERTISED_* flags for the link modes,
 *	physical connectors and other link features that are
 *	advertised through autonegotiation or enabled for
 *	auto-detection.
 * @speed: Low bits of the speed
 * @duplex: Duplex mode; one of %DUPLEX_*
 * @port: Physical connector type; one of %PORT_*
 * @phy_address: MDIO address of PHY (transceiver); 0 or 255 if not
 *	applicable.  For clause 45 PHYs this is the PRTAD.
 * @transceiver: Historically used to distinguish different possible
 *	PHY types, but not in a consistent way.  Deprecated.
 * @autoneg: Enable/disable autonegotiation and auto-detection;
 *	either %AUTONEG_DISABLE or %AUTONEG_ENABLE
 * @mdio_support: Bitmask of %ETH_MDIO_SUPPORTS_* flags for the MDIO
 *	protocols supported by the interface; 0 if unknown.
 *	Read-only.
 * @maxtxpkt: Historically used to report TX IRQ coalescing; now
 *	obsoleted by &struct ethtool_coalesce.  Read-only; deprecated.
 * @maxrxpkt: Historically used to report RX IRQ coalescing; now
 *	obsoleted by &struct ethtool_coalesce.  Read-only; deprecated.
 * @speed_hi: High bits of the speed
 * @eth_tp_mdix: Ethernet twisted-pair MDI(-X) status; one of
 *	%ETH_TP_MDI_*.  If the status is unknown or not applicable, the
 *	value will be %ETH_TP_MDI_INVALID.  Read-only.
 * @eth_tp_mdix_ctrl: Ethernet twisted pair MDI(-X) control; one of
 *	%ETH_TP_MDI_*.  If MDI(-X) control is not implemented, reads
 *	yield %ETH_TP_MDI_INVALID and writes may be ignored or rejected.
 *	When written successfully, the link should be renegotiated if
 *	necessary.
 * @lp_advertising: Bitmask of %ADVERTISED_* flags for the link modes
 *	and other link features that the link partner advertised
 *	through autonegotiation; 0 if unknown or not applicable.
 *	Read-only.
 *
 * The link speed in Mbps is split between @speed and @speed_hi.  Use
 * the ethtool_cmd_speed() and ethtool_cmd_speed_set() functions to
 * access it.
 *
 * If autonegotiation is disabled, the speed and @duplex represent the
 * fixed link mode and are writable if the driver supports multiple
 * link modes.  If it is enabled then they are read-only; if the link
 * is up they represent the negotiated link mode; if the link is down,
 * the speed is 0, %SPEED_UNKNOWN or the highest enabled speed and
 * @duplex is %DUPLEX_UNKNOWN or the best enabled duplex mode.
 *
 * Some hardware interfaces may have multiple PHYs and/or physical
 * connectors fitted or do not allow the driver to detect which are
 * fitted.  For these interfaces @port and/or @phy_address may be
 * writable, possibly dependent on @autoneg being %AUTONEG_DISABLE.
 * Otherwise, attempts to write different values may be ignored or
 * rejected.
 *
 * Users should assume that all fields not marked read-only are
 * writable and subject to validation by the driver.  They should use
 * %ETHTOOL_GSET to get the current values before making specific
 * changes and then applying them with %ETHTOOL_SSET.
 *
 * Drivers that implement