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 set_settings() should validate all fields
 * other than @cmd that are not described as read-only or deprecated,
 * and must ignore all fields described as read-only.
 *
 * Deprecated fields should be ignored by both users and drivers.
 */
struct ethtool_cmd {
	__u32	cmd;
	__u32	supported;
	__u32	advertising;
	__u16	speed;
	__u8	duplex;
	__u8	port;
	__u8	phy_address;
	__u8	transceiver;
	__u8	autoneg;
	__u8	mdio_support;
	__u32	maxtxpkt;
	__u32	maxrxpkt;
	__u16	speed_hi;
	__u8	eth_tp_mdix;
	__u8	eth_tp_mdix_ctrl;
	__u32	lp_advertising;
	__u32	reserved[2];
};

static inline void ethtool_cmd_speed_set(struct ethtool_cmd *ep,
					 __u32 speed)
{

	ep->speed = (__u16)speed;
	ep->speed_hi = (__u16)(speed >> 16);
}

static inline __u32 ethtool_cmd_speed(const struct ethtool_cmd *ep)
{
	return (ep->speed_hi << 16) | ep->speed;
}

/* Device supports clause 22 register access to PHY or peripherals
 * using the interface defined in <linux/mii.h>.  This should not be
 * set if there are known to be no such peripherals present or if
 * the driver only emulates clause 22 registers for compatibility.
 */
#define ETH_MDIO_SUPPORTS_C22	1

/* Device supports clause 45 register access to PHY or peripherals
 * using the interface defined in <linux/mii.h> and <linux/mdio.h>.
 * This should not be set if there are known to be no such peripherals
 * present.
 */
#define ETH_MDIO_SUPPORTS_C45	2

#define ETHTOOL_FWVERS_LEN	32
#define ETHTOOL_BUSINFO_LEN	32

/**
 * struct ethtool_drvinfo - general driver and device information
 * @cmd: Command number = %ETHTOOL_GDRVINFO
 * @driver: Driver short name.  This should normally match the name
 *	in its bus driver structure (e.g. pci_driver::name).  Must
 *	not be an empty string.
 * @version: Driver version string; may be an empty string
 * @fw_version: Firmware version string; may be an empty string
 * @bus_info: Device bus address.  This should match the dev_name()
 *	string for the underlying bus device, if there is one.  May be
 *	an empty string.
 * @n_priv_flags: Number of flags valid for %ETHTOOL_GPFLAGS and
 *	%ETHTOOL_SPFLAGS commands; also the number of strings in the
 *	%ETH_SS_PRIV_FLAGS set
 * @n_stats: Number of u64 statistics returned by the %ETHTOOL_GSTATS
 *	command; also the number of strings in the %ETH_SS_STATS set
 * @testinfo_len: Number of results returned by the %ETHTOOL_TEST
 *	command; also the number of strings in the %ETH_SS_TEST set
 * @eedump_len: Size of EEPROM accessible through the %ETHTOOL_GEEPROM
 *	and %ETHTOOL_SEEPROM commands, in bytes
 * @regdump_len: Size of register dump returned by the %ETHTOOL_GREGS
 *	command, in bytes
 *
 * Users can use the %ETHTOOL_GSSET_INFO command to get the number of
 * strings in any string set (from Linux 2.6.34).
 *
 * Drivers should set at most @driver, @version, @fw_version and
 * @bus_info in their get_drvinfo() implementation.  The ethtool
 * core fills in the other fields using other driver operations.
 */
struct ethtool_drvinfo {
	__u32	cmd;
	char	driver[32];
	char	version[32];
	char	fw_version[ETHTOOL_FWVERS_LEN];
	char	bus_info[ETHTOOL_BUSINFO_LEN];
	char	reserved1[32];
	char	reserved2[12];
	__u32	n_priv_flags;
	__u32	n_stats;
	__u32	testinfo_len;
	__u32	eedump_len;
	__u32	regdump_len;
};

#define SOPASS_MAX	6

/**
 * struct ethtool_wolinfo - Wake-On-Lan configuration
 * @cmd: Command number = %ETHTOOL_GWOL or %ETHTOOL_SWOL
 * @supported: Bitmask of %WAKE_* flags for supported Wake-On-Lan modes.
 *	Read-only.
 * @wolopts: Bitmask of %WAKE_* flags for enabled Wake-On-Lan modes.
 * @sopass: SecureOn(tm) password; meaningful only if %WAKE_MAGICSECURE
 *	is set in @wolopts.
 */
struct ethtool_wolinfo {
	__u32	cmd;
	__u32	supported;
	__u32	wolopts;
	__u8	sopass[SOPASS_MAX];
};

/* for passing single values */
struct ethtool_value {
	__u32	cmd;
	__u32	data;
};

/**
 * struct ethtool_regs - hardware register dump
 * @cmd: Command number = %ETHTOOL_GREGS
 * @version: Dump format version.  This is driver-specific and may
 *	distinguish different chips/revisions.  Drivers must use new
 *	version numbers whenever the dump format changes in an
 *	incompatible way.
 * @len: On entry, the real length of @data.  On return, the number of
 *	bytes used.
 * @data: Buffer for the register dump
 *
 * Users should use %ETHTOOL_GDRVINFO to find the maximum length of
 * a register dump for the interface.  They must allocate the buffer
 * immediately following this structure.
 */
struct ethtool_regs {
	__u32	cmd;
	__u32	version;
	__u32	len;
	__u8	data[0];
};

/**
 * struct ethtool_eeprom - EEPROM dump
 * @cmd: Command number = %ETHTOOL_GEEPROM, %ETHTOOL_GMODULEEEPROM or
 *	%ETHTOOL_SEEPROM
 * @magic: A 'magic cookie' value to guard against accidental changes.
 *	The value passed in to %ETHTOOL_SEEPROM must match the value
 *	returned by %ETHTOOL_GEEPROM for the same device.  This is
 *	unused when @cmd is %ETHTOOL_GMODULEEEPROM.
 * @offset: Offset within the EEPROM to begin reading/writing, in bytes
 * @len: On entry, number of bytes to read/write.  On successful
 *	return, number of bytes actually read/written.  In case of
 *	error, this may indicate at what point the error occurred.
 * @data: Buffer to read/write from
 *
 * Users may use %ETHTOOL_GDRVINFO or %ETHTOOL_GMODULEINFO to find
 * the length of an on-board or module EEPROM, respectively.  They
 * must allocate the buffer immediately following this structure.
 */
struct ethtool_eeprom {
	__u32	cmd;
	__u32	magic;
	__u32	offset;
	__u32	len;
	__u8	data[0];
};

/**
 * struct ethtool_eee - Energy Efficient Ethernet information
 * @cmd: ETHTOOL_{G,S}EEE
 * @supported: Mask of %SUPPORTED_* flags for the speed/duplex combinations
 *	for which there is EEE support.
 * @advertised: Mask of %ADVERTISED_* flags for the speed/duplex combinations
 *	advertised as eee capable.
 * @lp_advertised: Mask of %ADVERTISED_* flags for the speed/duplex
 *	combinations advertised by the link partner as eee capable.
 * @eee_active: Result of the eee auto negotiation.
 * @eee_enabled: EEE configured mode (enabled/disabled).
 * @tx_lpi_enabled: Whether the interface should assert its tx lpi, given
 *	that eee was negotiated.
 * @tx_lpi_timer: Time in microseconds the interface delays prior to asserting
 *	its tx lpi (after reaching 'idle' state). Effective only when eee
 *	was negotiated and tx_lpi_enabled was set.
 */
struct ethtool_eee {
	__u32	cmd;
	__u32	supported;
	__u32	advertised;
	__u32	lp_advertised;
	__u32	eee_active;
	__u32	eee_enabled;
	__u32	tx_lpi_enabled;
	__u32	tx_lpi_timer;
	__u32	reserved[2];
};

/**
 * struct ethtool_modinfo - plugin module eeprom information
 * @cmd: %ETHTOOL_GMODULEINFO
 * @type: Standard the module information conforms to %ETH_MODULE_SFF_xxxx
 * @eeprom_len: Length of the eeprom
 *
 * This structure is used to return the information to
 * properly size memory for a subsequent call to %ETHTOOL_GMODULEEEPROM.
 * The type code indicates the eeprom data format
 */
struct ethtool_modinfo {
	__u32   cmd;
	__u32   type;
	__u32   eeprom_len;
	__u32   reserved[8];
};

/**
 * struct ethtool_coalesce - coalescing parameters for IRQs and stats updates
 * @cmd: ETHTOOL_{G,S}COALESCE
 * @rx_coalesce_usecs: How many usecs to delay an RX interrupt after
 *	a packet arrives.
 * @rx_max_coalesced_frames: Maximum number of packets to receive
 *	before an RX interrupt.
 * @rx_coalesce_usecs_irq: Same as @rx_coalesce_usecs, except that
 *	this value applies while an IRQ is being serviced by the host.
 * @rx_max_coalesced_frames_irq: Same as @rx_max_coalesced_frames,
 *	except that this value applies while an IRQ is being serviced
 *	by the host.
 * @tx_coalesce_usecs: How many usecs to delay a TX interrupt after
 *	a packet is sent.
 * @tx_max_coalesced_frames: Maximum number of packets to be sent
 *	before a TX interrupt.
 * @tx_coalesce_usecs_irq: Same as @tx_coalesce_usecs, except that
 *	this value applies while an IRQ is being serviced by the host.
 * @tx_max_coalesced_frames_irq: Same as @tx_max_coalesced_frames,
 *	except that this value applies while an IRQ is being serviced
 *	by the host.
 * @stats_block_coalesce_usecs: How many usecs to delay in-memory
 *	statistics block updates.  Some drivers do not have an
 *	in-memory statistic block, and in such cases this value is
 *	ignored.  This value must not be zero.
 * @use_adaptive_rx_coalesce: Enable adaptive RX coalescing.
 * @use_adaptive_tx_coalesce: Enable adaptive TX coalescing.
 * @pkt_rate_low: Threshold for low packet rate (packets per second).
 * @rx_coalesce_usecs_low: How many usecs to delay an RX interrupt after
 *	a packet arrives, when the packet rate is below @pkt_rate_low.
 * @rx_max_coalesced_frames_low: Maximum number of packets to be received
 *	before an RX interrupt, when the packet rate is below @pkt_rate_low.
 * @tx_coalesce_usecs_low: How many usecs to delay a TX interrupt after
 *	a packet is sent, when the packet rate is below @pkt_rate_low.
 * @tx_max_coalesced_frames_low: Maximum nuumber of packets to be sent before
 *	a TX interrupt, when the packet rate is below @pkt_rate_low.
 * @pkt_rate_high: Threshold for high packet rate (packets per second).
 * @rx_coalesce_usecs_high: How many usecs to delay an RX interrupt after
 *	a packet arrives, when the packet rate is above @pkt_rate_high.
 * @rx_max_coalesced_frames_high: Maximum number of packets to be received
 *	before an RX interrupt, when the packet rate is above @pkt_rate_high.
 * @tx_coalesce_usecs_high: How many usecs to delay a TX interrupt after
 *	a packet is sent, when the packet rate is above @pkt_rate_high.
 * @tx_max_coalesced_frames_high: Maximum number of packets to be sent before
 *	a TX interrupt, when the packet rate is above @pkt_rate_high.
 * @rate_sample_interval: How often to do adaptive coalescing packet rate
 *	sampling, measured in seconds.  Must not be zero.
 *
 * Each pair of (usecs, max_frames) fields specifies that interrupts
 * should be coalesced until
 *	(usecs > 0 && time_since_first_completion >= usecs) ||
 *	(max_frames > 0 && completed_frames >= max_frames)
 *
 * It is illegal to set both usecs and max_frames to zero as this
 * would cause interrupts to never be generated.  To disable
 * coalescing, set usecs = 0 and max_frames = 1.
 *
 * Some implementations ignore the value of max_frames and use the
 * condition time_since_first_completion >= usecs
 *
 * This is deprecated.  Drivers for hardware that does not support
 * counting completions should validate that max_frames == !rx_usecs.
 *
 * Adaptive RX/TX coalescing is an algorithm implemented by some
 * drivers to improve latency under low packet rates and improve
 * throughput under high packet rates.  Some drivers only implement
 * one of RX or TX adaptive coalescing.  Anything not implemented by
 * the driver causes these values to be silently ignored.
 *
 * When the packet rate is below @pkt_rate_high but above
 * @pkt_rate_low (both measured in packets per second) the
 * normal {rx,tx}_* coalescing parameters are used.
 */
struct ethtool_coalesce {
	__u32	cmd;
	__u32	rx_coalesce_usecs;
	__u32	rx_max_coalesced_frames;
	__u32	rx_coalesce_usecs_irq;
	__u32	rx_max_coalesced_frames_irq;
	__u32	tx_coalesce_usecs;
	__u32	tx_max_coalesced_frames;
	__u32	tx_coalesce_usecs_irq;
	__u32	tx_max_coalesced_frames_irq;
	__u32	stats_block_coalesce_usecs;
	__u32	use_adaptive_rx_coalesce;
	__u32	use_adaptive_tx_coalesce;
	__u32	pkt_rate_low;
	__u32	rx_coalesce_usecs_