xref: /illumos-gate/usr/src/uts/common/sys/mac_provider.h (revision 86e5bb79)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2018, Joyent, Inc.
 * Copyright 2020 RackTop Systems, Inc.
 * Copyright 2023 Oxide Computer Company
 */

#ifndef	_SYS_MAC_PROVIDER_H
#define	_SYS_MAC_PROVIDER_H

#include <sys/types.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/stream.h>
#include <sys/mkdev.h>
#include <sys/mac.h>
#include <sys/mac_flow.h>

/*
 * MAC Provider Interface
 */

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * MAC version identifiers. Drivers compiled against the stable V1 version
 * of the API should register with MAC_VERSION_V1. ON drivers should use
 * MAC_VERSION. This is used by mac_alloc() mac_register() to
 * verify that incompatible drivers don't register.
 */
#define	MAC_VERSION_V1	0x1
#define	MAC_VERSION	MAC_VERSION_V1

/*
 * Possible values for ETHER_STAT_XCVR_INUSE statistic.
 */

#define	XCVR_UNDEFINED		0
#define	XCVR_NONE		1
#define	XCVR_10			2
#define	XCVR_100T4		3
#define	XCVR_100X		4
#define	XCVR_100T2		5
#define	XCVR_1000X		6
#define	XCVR_1000T		7

#ifdef	_KERNEL

/*
 * Definitions for MAC Drivers Capabilities
 */
/*
 * MAC layer capabilities.  These capabilities are handled by the drivers'
 * mc_capab_get() callbacks.  Some capabilities require the driver to fill
 * in a given data structure, and others are simply boolean capabilities.
 * Note that capability values must be powers of 2 so that consumers and
 * providers of this interface can keep track of which capabilities they
 * care about by keeping a bitfield of these things around somewhere.
 */
typedef enum {
	/*
	 * Public Capabilities (MAC_VERSION_V1)
	 */
	MAC_CAPAB_HCKSUM	= 0x00000001, /* data is a uint32_t */
	MAC_CAPAB_LSO		= 0x00000008, /* data is mac_capab_lso_t */

	/*
	 * Reserved capabilities, do not use
	 */
	MAC_CAPAB_RESERVED1	= 0x00000002,
	MAC_CAPAB_RESERVED2	= 0x00000004,

	/*
	 * Private driver capabilities
	 */
	MAC_CAPAB_RINGS		= 0x00000010, /* data is mac_capab_rings_t */
	MAC_CAPAB_SHARES	= 0x00000020, /* data is mac_capab_share_t */
	MAC_CAPAB_MULTIFACTADDR = 0x00000040, /* mac_data_multifactaddr_t */

	/*
	 * Private driver capabilities for use by the GLDv3 framework only
	 */
	MAC_CAPAB_VNIC		= 0x00010000, /* data is mac_capab_vnic_t */
	MAC_CAPAB_ANCHOR_VNIC	= 0x00020000, /* boolean only, no data */
	MAC_CAPAB_AGGR		= 0x00040000, /* data is mac_capab_aggr_t */
	MAC_CAPAB_NO_NATIVEVLAN	= 0x00080000, /* boolean only, no data */
	MAC_CAPAB_NO_ZCOPY	= 0x00100000, /* boolean only, no data */
	MAC_CAPAB_LEGACY	= 0x00200000, /* data is mac_capab_legacy_t */
	MAC_CAPAB_VRRP		= 0x00400000, /* data is mac_capab_vrrp_t */
	MAC_CAPAB_OVERLAY	= 0x00800000, /* boolean only, no data */
	MAC_CAPAB_TRANSCEIVER	= 0x01000000, /* mac_capab_transceiver_t */
	MAC_CAPAB_LED		= 0x02000000  /* data is mac_capab_led_t */
} mac_capab_t;

/*
 * LSO capability
 */
typedef struct lso_basic_tcp_ipv4_s {
	t_uscalar_t	lso_max;		/* maximum payload */
} lso_basic_tcp_ipv4_t;

typedef struct lso_basic_tcp_ipv6_s {
	t_uscalar_t	lso_max;		/* maximum payload */
} lso_basic_tcp_ipv6_t;

/*
 * Currently supported flags for LSO.
 */
#define	LSO_TX_BASIC_TCP_IPV4	0x01		/* TCPv4 LSO capability */
#define	LSO_TX_BASIC_TCP_IPV6	0x02		/* TCPv6 LSO capability */

/*
 * Future LSO capabilities can be added at the end of the mac_capab_lso_t.
 * When such capability is added to the GLDv3 framework, the size of the
 * mac_capab_lso_t it allocates and passes to the drivers increases. Older
 * drivers wil access only the (upper) sections of that structure, that is the
 * sections carrying the capabilities they understand. This ensures the
 * interface can be safely extended in a binary compatible way.
 */
typedef	struct mac_capab_lso_s {
	t_uscalar_t		lso_flags;
	lso_basic_tcp_ipv4_t	lso_basic_tcp_ipv4;
	lso_basic_tcp_ipv6_t	lso_basic_tcp_ipv6;
	/* Add future lso capabilities here */
} mac_capab_lso_t;

/*
 * Multiple Factory MAC Addresses Capability
 */
typedef struct mac_capab_multifactaddr_s {
	/*
	 * Number of factory addresses
	 */
	uint_t		mcm_naddr;

	/*
	 * Callbacks to query all the factory addresses.
	 */
	void		(*mcm_getaddr)(void *, uint_t, uint8_t *);
} mac_capab_multifactaddr_t;

/*
 * Info and callbacks of legacy devices.
 */
typedef struct mac_capab_legacy_s {
	/*
	 * Notifications that the legacy device does not support.
	 */
	uint32_t	ml_unsup_note;
	/*
	 * dev_t of the legacy device; can be held to force attach.
	 */
	dev_t		ml_dev;
	boolean_t	(*ml_active_set)(void *);
	void		(*ml_active_clear)(void *);
	int		(*ml_fastpath_disable)(void *);
	void		(*ml_fastpath_enable)(void *);
} mac_capab_legacy_t;

typedef struct __mac_prop_info_handle *mac_prop_info_handle_t;

/*
 * MAC driver entry point types.
 */
typedef int		(*mac_getstat_t)(void *, uint_t, uint64_t *);
typedef	int		(*mac_start_t)(void *);
typedef void		(*mac_stop_t)(void *);
typedef int		(*mac_setpromisc_t)(void *, boolean_t);
typedef int		(*mac_multicst_t)(void *, boolean_t, const uint8_t *);
typedef int		(*mac_unicst_t)(void *, const uint8_t *);
typedef void		(*mac_ioctl_t)(void *, queue_t *, mblk_t *);
typedef void		(*mac_resources_t)(void *);
typedef mblk_t		*(*mac_tx_t)(void *, mblk_t *);
typedef	boolean_t	(*mac_getcapab_t)(void *, mac_capab_t, void *);
typedef	int		(*mac_open_t)(void *);
typedef void		(*mac_close_t)(void *);
typedef	int		(*mac_set_prop_t)(void *, const char *, mac_prop_id_t,
			    uint_t, const void *);
typedef	int		(*mac_get_prop_t)(void *, const char *, mac_prop_id_t,
			    uint_t, void *);
typedef void		(*mac_prop_info_t)(void *, const char *, mac_prop_id_t,
			    mac_prop_info_handle_t);

/*
 * Driver callbacks. The following capabilities are optional, and if
 * implemented by the driver, must have a corresponding MC_ flag set
 * in the mc_callbacks field.
 *
 * Any future additions to this list must also be accompanied by an
 * associated mc_callbacks flag so that the framework can grow without
 * affecting the binary compatibility of the interface.
 */
typedef struct mac_callbacks_s {
	uint_t		mc_callbacks;	/* Denotes which callbacks are set */
	mac_getstat_t	mc_getstat;	/* Get the value of a statistic */
	mac_start_t	mc_start;	/* Start the device */
	mac_stop_t	mc_stop;	/* Stop the device */
	mac_setpromisc_t mc_setpromisc;	/* Enable or disable promiscuous mode */
	mac_multicst_t	mc_multicst;	/* Enable or disable a multicast addr */
	mac_unicst_t	mc_unicst;	/* Set the unicast MAC address */
	mac_tx_t	mc_tx;		/* Transmit a packet */
	void		*mc_reserved;	/* Reserved, do not use */
	mac_ioctl_t	mc_ioctl;	/* Process an unknown ioctl */
	mac_getcapab_t	mc_getcapab;	/* Get capability information */
	mac_open_t	mc_open;	/* Open the device */
	mac_close_t	mc_close;	/* Close the device */
	mac_set_prop_t	mc_setprop;
	mac_get_prop_t	mc_getprop;
	mac_prop_info_t	mc_propinfo;
} mac_callbacks_t;

/*
 * Flags for mc_callbacks.  Requiring drivers to set the flags associated
 * with optional callbacks initialized in the structure allows the mac
 * module to add optional callbacks in the future without requiring drivers
 * to recompile.
 */
#define	MC_RESERVED	0x0001
#define	MC_IOCTL	0x0002
#define	MC_GETCAPAB	0x0004
#define	MC_OPEN		0x0008
#define	MC_CLOSE	0x0010
#define	MC_SETPROP	0x0020
#define	MC_GETPROP	0x0040
#define	MC_PROPINFO	0x0080
#define	MC_PROPERTIES	(MC_SETPROP | MC_GETPROP | MC_PROPINFO)

/*
 * Virtualization Capabilities
 */

/*
 * The type of ring classification. This is used by MAC to determine
 * what, if any, processing it has to do upon receiving traffic on a
 * particular Rx ring.
 *
 * MAC_NO_CLASSIFIER
 *
 *	No classification has been set. No traffic should cross an Rx
 *	ring in this state.
 *
 * MAC_SW_CLASSIFIER
 *
 *	The driver delivers traffic for multiple clients to this ring.
 *	All traffic must be software classified by MAC to guarantee
 *	delivery to the correct client. This classification type may
 *	be chosen for several reasons.
 *
 *	o The driver provides only one group and there are multiple
 *	  clients using the MAC.
 *
 *	o The driver provides some hardware filtering but not enough
 *	  to fully classify the traffic. E.g., a VLAN VNIC requires L2
 *	  unicast address filtering as well as VLAN filtering, but
 *	  some drivers may only support the former.
 *
 *	o The ring belongs to the default group. The default group
 *	  acts as a spillover for all clients that can't reserve an
 *	  exclusive group. It also handles multicast traffic for all
 *	  clients. For these reasons, the default group's rings are
 *	  always software classified.
 *
 * MAC_HW_CLASSIFIER
 *
 *	The driver delivers traffic for a single MAC client across
 *	this ring. With this guarantee, MAC can simply pass the
 *	traffic up the stack or even allow polling of the ring.
 *
 * MAC_PASSTHRU_CLASSIFIER
 *
 *	The ring is in "passthru" mode. In this mode we bypass all of
 *	the typical MAC processing and pass the traffic directly to
 *	the mr_pt_fn callback, see mac_rx_common(). This is used in
 *	cases where there is another module acting as MAC provider on
 *	behalf of the driver. E.g., link aggregations use this mode to
 *	take full control of the port's rings; allowing it to enforce
 *	LACP protocols and aggregate rings across discrete drivers.
 */
typedef enum {
	MAC_NO_CLASSIFIER = 0,
	MAC_SW_CLASSIFIER,
	MAC_HW_CLASSIFIER,
	MAC_PASSTHRU_CLASSIFIER
} mac_classify_type_t;

typedef	void	(*mac_rx_func_t)(void *, mac_resource_handle_t, mblk_t *,
    boolean_t);

/*
 * The virtualization level conveys the extent of the NIC hardware assistance
 * for traffic steering employed for virtualization:
 *
 * MAC_VIRT_NONE:	No assist for v12n.
 *
 * MAC_VIRT_LEVEL1:	Multiple Rx rings with MAC address level
 *			classification between groups of rings.
 *			Requires the support of the MAC_CAPAB_RINGS
 *			capability.
 *
 * MAC_VIRT_HIO:	Hybrid I/O capable MAC. Require the support
 *			of the MAC_CAPAB_SHARES capability.
 */
#define	MAC_VIRT_NONE		0x0
#define	MAC_VIRT_LEVEL1		0x1
#define	MAC_VIRT_HIO		0x2

typedef enum {
	MAC_RING_TYPE_RX = 1,	/* Receive ring */
	MAC_RING_TYPE_TX	/* Transmit ring */
} mac_ring_type_t;

/*
 * The value VLAN_ID_NONE (VID 0) means a client does not have
 * membership to any VLAN. However, this statement is true for both
 * untagged packets and priority tagged packets leading to confusion
 * over what semantic is intended. To the provider, VID 0 is a valid
 * VID when priority tagging is in play. To MAC and everything above
 * VLAN_ID_NONE almost universally implies untagged traffic. Thus, we
 * convert VLAN_ID_NONE to a sentinel value (MAC_VLAN_UNTAGGED) at the
 * border between MAC and MAC provider. This informs the provider that
 * the client is interested in untagged traffic and the provider
 * should set any relevant bits to receive such traffic.
 *
 * Currently, the API between MAC and the provider passes the VID as a
 * unit16_t. In the future this could actually be the entire TCI mask
 * (PCP, DEI, and VID). This current scheme is safe in that potential
 * future world as well; as 0xFFFF is not a valid TCI (the 0xFFF VID
 * is reserved and never transmitted across networks).
 */
#define	MAC_VLAN_UNTAGGED		UINT16_MAX
#define	MAC_VLAN_UNTAGGED_VID(vid)	\
	(((vid) == VLAN_ID_NONE) ? MAC_VLAN_UNTAGGED : (vid))

/*
 * Grouping type of a ring group
 *
 * MAC_GROUP_TYPE_STATIC: The ring group can not be re-grouped.
 * MAC_GROUP_TYPE_DYNAMIC: The ring group support dynamic re-grouping
 */
typedef enum {
	MAC_GROUP_TYPE_STATIC = 1,	/* Static ring group */
	MAC_GROUP_TYPE_DYNAMIC		/* Dynamic ring group */
} mac_group_type_t;

typedef	struct __mac_ring_driver	*mac_ring_driver_t;
typedef	struct __mac_group_driver	*mac_group_driver_t;

typedef	struct mac_ring_info_s mac_ring_info_t;
typedef	struct mac_group_info_s mac_group_info_t;

typedef void	(*mac_get_ring_t)(void *, mac_ring_type_t, const int, const int,
    mac_ring_info_t *, mac_ring_handle_t);
typedef void	(*mac_get_group_t)(void *, mac_ring_type_t, const int,
    mac_group_info_t *, mac_group_handle_t);

typedef void	(*mac_group_add_ring_t)(mac_group_driver_t,
    mac_ring_driver_t, mac_ring_type_t);
typedef void	(*mac_group_rem_ring_t)(mac_group_driver_t,
    mac_ring_driver_t, mac_ring_type_t);

/*
 * Multiple Rings Capability
 */
typedef struct	mac_capab_rings_s {
	mac_ring_type_t		mr_type;	/* Ring type: Rx vs Tx */
	mac_group_type_t	mr_group_type;	/* Dynamic vs static grouping */
	uint_t			mr_rnum;	/* Number of rings */
	uint_t			mr_gnum;	/* Number of ring groups */
	mac_get_ring_t		mr_rget;	/* Get ring from driver */
	mac_get_group_t		mr_gget;	/* Get ring group from driver */
	mac_group_add_ring_t	mr_gaddring;	/* Add ring into a group */
	mac_group_rem_ring_t	mr_gremring;	/* Remove ring from a group */
} mac_capab_rings_t;

/*
 * Common ring functions and driver interfaces
 */
typedef	int	(*mac_ring_start_t)(mac_ring_driver_t, uint64_t);
typedef	void	(*mac_ring_stop_t)(mac_ring_driver_t);

typedef	mblk_t	*(*mac_ring_send_t)(void *, mblk_t *);
typedef	mblk_t	*(*mac_ring_poll_t)(void *, int);

typedef int	(*mac_ring_stat_t)(mac_ring_driver_t, uint_t, uint64_t *);

typedef struct mac_ring_info_s {
	mac_ring_driver_t	mri_driver;
	mac_ring_start_t	mri_start;
	mac_ring_stop_t		mri_stop;
	mac_intr_t		mri_intr;
	union {
		mac_ring_send_t	send;
		mac_ring_poll_t	poll;
	} mrfunion;
	mac_ring_stat_t		mri_stat;

	/*
	 * mri_flags will have some bits set to indicate some special
	 * property/feature of a ring like serialization needed for a
	 * Tx ring or packets should always need enqueuing on Rx side,
	 * etc.
	 */
	uint_t			mri_flags;
} mac_ring_info_s;

#define	mri_tx			mrfunion.send
#define	mri_poll		mrfunion.poll

/*
 * #defines for mri_flags. The flags are temporary flags that are provided
 * only to workaround issues in specific drivers, and they will be
 * removed in the future.
 *
 * These are consumed only by sun4v and neptune (nxge).
 */
#define	MAC_RING_TX_SERIALIZE		0x1
#define	MAC_RING_RX_ENQUEUE		0x2

typedef	int	(*mac_group_start_t)(mac_group_driver_t);
typedef	void	(*mac_group_stop_t)(mac_group_driver_t);
typedef	int	(*mac_add_mac_addr_t)(void *, const uint8_t *);
typedef	int	(*mac_rem_mac_addr_t)(void *, const uint8_t *);
typedef int	(*mac_add_vlan_filter_t)(mac_group_driver_t, uint16_t);
typedef int	(*mac_rem_vlan_filter_t)(mac_group_driver_t, uint16_t);

struct mac_group_info_s {
	mac_group_driver_t	mgi_driver;	/* Driver reference */
	mac_group_start_t	mgi_start;	/* Start the group */
	mac_group_stop_t	mgi_stop;	/* Stop the group */
	uint_t			mgi_count;	/* Count of rings */
	mac_intr_t		mgi_intr;	/* Optional per-group intr */

	/* Only used for Rx groups */
	mac_add_mac_addr_t	mgi_addmac;	/* Add a MAC address */
	mac_rem_mac_addr_t	mgi_remmac;	/* Remove a MAC address */
	mac_add_vlan_filter_t	mgi_addvlan;	/* Add a VLAN filter */
	mac_rem_vlan_filter_t	mgi_remvlan;	/* Remove a VLAN filter */
};

/*
 * Share management functions.
 */
typedef uint64_t mac_share_handle_t;

/*
 * Allocate and free a share. Returns ENOSPC if all shares have been
 * previously allocated.
 */
typedef int (*mac_alloc_share_t)(void *, mac_share_handle_t *);
typedef void (*mac_free_share_t)(mac_share_handle_t);

/*
 * Bind and unbind a share. Binding a share allows a domain
 * to have direct access to the groups and rings associated with
 * that share.
 */
typedef int (*mac_bind_share_t)(mac_share_handle_t, uint64_t, uint64_t *);
typedef void (*mac_unbind_share_t)(mac_share_handle_t);

/*
 * Return information on about a share.
 */
typedef void (*mac_share_query_t)(mac_share_handle_t, mac_ring_type_t,
    mac_ring_handle_t *, uint_t *);

/*
 * Basic idea, bind previously created ring groups to shares
 * for them to be exported (or shared) by another domain.
 * These interfaces bind/unbind the ring group to a share.
 * The groups and their rings will be shared with the guest
 * as soon as the share is bound.
 */
typedef int (*mac_share_add_group_t)(mac_share_handle_t,
    mac_group_driver_t);
typedef int (*mac_share_rem_group_t)(mac_share_handle_t,
    mac_group_driver_t);

typedef struct  mac_capab_share_s {
	uint_t			ms_snum;	/* Number of shares (vr's) */
	void			*ms_handle;	/* Handle to driver. */
	mac_alloc_share_t	ms_salloc;	/* Get a share from driver. */
	mac_free_share_t	ms_sfree;	/* Return a share to driver. */
	mac_share_add_group_t	ms_sadd;	/* Add a group to the share. */
	mac_share_rem_group_t	ms_sremove;	/* Remove group from share. */
	mac_share_query_t	ms_squery;	/* Query share constraints */
	mac_bind_share_t	ms_sbind;	/* Bind a share */
	mac_unbind_share_t	ms_sunbind;	/* Unbind a share */
} mac_capab_share_t;

typedef struct mac_capab_vrrp_s {
	/* IPv6 or IPv4? */
	int		mcv_af;
} mac_capab_vrrp_t;

/*
 * Transceiver capability
 */
typedef struct mac_transceiver_info mac_transceiver_info_t;

typedef struct mac_capab_transceiver {
	uint_t	mct_flags;
	uint_t	mct_ntransceivers;
	int	(*mct_info)(void *, uint_t, mac_transceiver_info_t *);
	int	(*mct_read)(void *, uint_t, uint_t, void *, size_t, off_t,
		    size_t *);
} mac_capab_transceiver_t;

/*
 * LED capability
 */
typedef struct mac_capab_led {
	uint_t		mcl_flags;
	mac_led_mode_t	mcl_modes;
	int		(*mcl_set)(void *, mac_led_mode_t, uint_t);
} mac_capab_led_t;

/*
 * MAC registration interface
 */
typedef struct mac_register_s {
	uint_t			m_version;	/* set by mac_alloc() */
	const char		*m_type_ident;
	void			*m_driver;	/* Driver private data */
	dev_info_t		*m_dip;
	uint_t			m_instance;
	uint8_t			*m_src_addr;
	uint8_t			*m_dst_addr;
	mac_callbacks_t		*m_callbacks;
	uint_t			m_min_sdu;
	uint_t			m_max_sdu;
	void			*m_pdata;
	size_t			m_pdata_size;
	char			**m_priv_props;
	uint32_t		m_margin;
	uint32_t		m_v12n;		/* Virtualization level */
	uint_t			m_multicast_sdu;
} mac_register_t;

/*
 * Driver interface functions.
 */
extern mac_protect_t		*mac_protect_get(mac_handle_t);
extern void			mac_sdu_get(mac_handle_t, uint_t *, uint_t *);
extern void			mac_sdu_get2(mac_handle_t, uint_t *, uint_t *,
				    uint_t *);
extern int			mac_maxsdu_update(mac_handle_t, uint_t);
extern int			mac_maxsdu_update2(mac_handle_t, uint_t,
				    uint_t);

extern mac_register_t		*mac_alloc(uint_t);
extern void			mac_free(mac_register_t *);
extern int			mac_register(mac_register_t *, mac_handle_t *);
extern int			mac_disable_nowait(mac_handle_t);
extern int			mac_disable(mac_handle_t);
extern int			mac_unregister(mac_handle_t);
extern void			mac_rx(mac_handle_t, mac_resource_handle_t,
				    mblk_t *);
extern void			mac_rx_ring(mac_handle_t, mac_ring_handle_t,
				    mblk_t *, uint64_t);
extern void			mac_link_update(mac_handle_t, link_state_t);
extern void			mac_link_redo(mac_handle_t, link_state_t);
extern void			mac_unicst_update(mac_handle_t,
				    const uint8_t *);
extern void			mac_dst_update(mac_handle_t, const uint8_t *);
extern void			mac_tx_update(mac_handle_t);
extern void			mac_tx_ring_update(mac_handle_t,
				    mac_ring_handle_t);
extern void			mac_capab_update(mac_handle_t);
extern int			mac_pdata_update(mac_handle_t, void *,
				    size_t);
extern void			mac_multicast_refresh(mac_handle_t,
				    mac_multicst_t, void *, boolean_t);
extern void			mac_unicst_refresh(mac_handle_t, mac_unicst_t,
				    void *);
extern void			mac_promisc_refresh(mac_handle_t,
				    mac_setpromisc_t, void *);
extern boolean_t		mac_margin_update(mac_handle_t, uint32_t);
extern void			mac_margin_get(mac_handle_t, uint32_t *);
extern int			mac_margin_remove(mac_handle_t, uint32_t);
extern int			mac_margin_add(mac_handle_t, uint32_t *,
				    boolean_t);
extern void			mac_init_ops(struct dev_ops *, const char *);
extern void			mac_fini_ops(struct dev_ops *);
extern int			mac_devt_to_instance(dev_t);
extern int			mac_getinfo(dev_info_t *, ddi_info_cmd_t,
				    void *, void **);
extern minor_t			mac_private_minor(void);
extern void			mac_ring_intr_set(mac_ring_handle_t,
				    ddi_intr_handle_t);


extern mactype_register_t	*mactype_alloc(uint_t);
extern void			mactype_free(mactype_register_t *);
extern int			mactype_register(mactype_register_t *);
extern int			mactype_unregister(const char *);

extern boolean_t		mac_unicst_verify(mac_handle_t,
				    const uint8_t *, uint_t);

extern int			mac_group_add_ring(mac_group_handle_t, int);
extern void			mac_group_rem_ring(mac_group_handle_t,
				    mac_ring_handle_t);
extern mac_ring_handle_t	mac_find_ring(mac_group_handle_t, int);

extern void			mac_prop_info_set_default_uint8(
				    mac_prop_info_handle_t, uint8_t);
extern void			mac_prop_info_set_default_str(
				    mac_prop_info_handle_t, const char *);
extern void			mac_prop_info_set_default_uint64(
				    mac_prop_info_handle_t, uint64_t);
extern void			mac_prop_info_set_default_uint32(
				    mac_prop_info_handle_t, uint32_t);
extern void			mac_prop_info_set_default_link_flowctrl(
				    mac_prop_info_handle_t, link_flowctrl_t);
extern void			mac_prop_info_set_default_fec(
				    mac_prop_info_handle_t, link_fec_t);
extern void			mac_prop_info_set_range_uint32(
				    mac_prop_info_handle_t,
				    uint32_t, uint32_t);
extern void			mac_prop_info_set_perm(mac_prop_info_handle_t,
				    uint8_t);

extern void			mac_hcksum_get(const mblk_t *, uint32_t *,
				    uint32_t *, uint32_t *, uint32_t *,
				    uint32_t *);
extern void			mac_hcksum_set(mblk_t *, uint32_t, uint32_t,
				    uint32_t, uint32_t, uint32_t);
extern void			mac_hcksum_clone(const mblk_t *, mblk_t *);

extern void			mac_lso_get(mblk_t *, uint32_t *, uint32_t *);

extern void			mac_transceiver_info_set_present(
				    mac_transceiver_info_t *,
				    boolean_t);
extern void			mac_transceiver_info_set_usable(
				    mac_transceiver_info_t *,
				    boolean_t);

/*
 * This represents a provisional set of currently illumos-private APIs to get
 * information about a mblk_t chain's type. This is an evolving interface.
 */
typedef enum mac_ether_offload_flags {
	MEOI_L2INFO_SET		= 1 << 0,
	MEOI_VLAN_TAGGED	= 1 << 1,
	MEOI_L3INFO_SET		= 1 << 2,
	MEOI_L4INFO_SET		= 1 << 3
} mac_ether_offload_flags_t;

typedef struct mac_ether_offload_info {
	mac_ether_offload_flags_t	meoi_flags;	/* What's valid? */
	size_t		meoi_len;	/* Total message length */
	uint8_t		meoi_l2hlen;	/* How long is the Ethernet header? */
	uint16_t	meoi_l3proto;	/* What's the Ethertype */
	uint8_t		meoi_l3hlen;	/* How long is the header? */
	uint8_t		meoi_l4proto;	/* What is the payload type? */
	uint8_t		meoi_l4hlen;	/* How long is the L4 header */
} mac_ether_offload_info_t;

extern int			mac_ether_offload_info(mblk_t *,
				    mac_ether_offload_info_t *);


#endif	/* _KERNEL */

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_MAC_PROVIDER_H */