[linux-2.6-block.git] / include / linux / mii.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * linux/mii.h: definitions for MII-compatible transceivers
 * Originally drivers/net/sunhme.h.
 *
 * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
 */
#ifndef __LINUX_MII_H__
#define __LINUX_MII_H__


#include <linux/if.h>
#include <linux/linkmode.h>
#include <uapi/linux/mii.h>

struct ethtool_cmd;

struct mii_if_info {
	int phy_id;
	int advertising;
	int phy_id_mask;
	int reg_num_mask;

	unsigned int full_duplex : 1;	/* is full duplex? */
	unsigned int force_media : 1;	/* is autoneg. disabled? */
	unsigned int supports_gmii : 1; /* are GMII registers supported? */

	struct net_device *dev;
	int (*mdio_read) (struct net_device *dev, int phy_id, int location);
	void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
};

extern int mii_link_ok (struct mii_if_info *mii);
extern int mii_nway_restart (struct mii_if_info *mii);
extern void mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
extern void mii_ethtool_get_link_ksettings(
	struct mii_if_info *mii, struct ethtool_link_ksettings *cmd);
extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
extern int mii_ethtool_set_link_ksettings(
	struct mii_if_info *mii, const struct ethtool_link_ksettings *cmd);
extern int mii_check_gmii_support(struct mii_if_info *mii);
extern void mii_check_link (struct mii_if_info *mii);
extern unsigned int mii_check_media (struct mii_if_info *mii,
				     unsigned int ok_to_print,
				     unsigned int init_media);
extern int generic_mii_ioctl(struct mii_if_info *mii_if,
			     struct mii_ioctl_data *mii_data, int cmd,
			     unsigned int *duplex_changed);


static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
{
	return (struct mii_ioctl_data *) &rq->ifr_ifru;
}

/**
 * mii_nway_result
 * @negotiated: value of MII ANAR and'd with ANLPAR
 *
 * Given a set of MII abilities, check each bit and returns the
 * currently supported media, in the priority order defined by
 * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
 * value of LPA solely, as described above.
 *
 * The one exception to IEEE 802.3u is that 100baseT4 is placed
 * between 100T-full and 100T-half.  If your phy does not support
 * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
 * priority order, you will need to roll your own function.
 */
static inline unsigned int mii_nway_result (unsigned int negotiated)
{
	unsigned int ret;

	if (negotiated & LPA_100FULL)
		ret = LPA_100FULL;
	else if (negotiated & LPA_100BASE4)
		ret = LPA_100BASE4;
	else if (negotiated & LPA_100HALF)
		ret = LPA_100HALF;
	else if (negotiated & LPA_10FULL)
		ret = LPA_10FULL;
	else
		ret = LPA_10HALF;

	return ret;
}

/**
 * mii_duplex
 * @duplex_lock: Non-zero if duplex is locked at full
 * @negotiated: value of MII ANAR and'd with ANLPAR
 *
 * A small helper function for a common case.  Returns one
 * if the media is operating or locked at full duplex, and
 * returns zero otherwise.
 */
static inline unsigned int mii_duplex (unsigned int duplex_lock,
				       unsigned int negotiated)
{
	if (duplex_lock)
		return 1;
	if (mii_nway_result(negotiated) & LPA_DUPLEX)
		return 1;
	return 0;
}

/**
 * ethtool_adv_to_mii_adv_t
 * @ethadv: the ethtool advertisement settings
 *
 * A small helper function that translates ethtool advertisement
 * settings to phy autonegotiation advertisements for the
 * MII_ADVERTISE register.
 */
static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
{
	u32 result = 0;

	if (ethadv & ADVERTISED_10baseT_Half)
		result |= ADVERTISE_10HALF;
	if (ethadv & ADVERTISED_10baseT_Full)
		result |= ADVERTISE_10FULL;
	if (ethadv & ADVERTISED_100baseT_Half)
		result |= ADVERTISE_100HALF;
	if (ethadv & ADVERTISED_100baseT_Full)
		result |= ADVERTISE_100FULL;
	if (ethadv & ADVERTISED_Pause)
		result |= ADVERTISE_PAUSE_CAP;
	if (ethadv & ADVERTISED_Asym_Pause)
		result |= ADVERTISE_PAUSE_ASYM;

	return result;
}

/**
 * linkmode_adv_to_mii_adv_t
 * @advertising: the linkmode advertisement settings
 *
 * A small helper function that translates linkmode advertisement
 * settings to phy autonegotiation advertisements for the
 * MII_ADVERTISE register.
 */
static inline u32 linkmode_adv_to_mii_adv_t(const unsigned long *advertising)
{
	u32 result = 0;

	if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, advertising))
		result |= ADVERTISE_10HALF;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, advertising))
		result |= ADVERTISE_10FULL;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, advertising))
		result |= ADVERTISE_100HALF;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, advertising))
		result |= ADVERTISE_100FULL;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
		result |= ADVERTISE_PAUSE_CAP;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
		result |= ADVERTISE_PAUSE_ASYM;

	return result;
}

/**
 * mii_adv_to_ethtool_adv_t
 * @adv: value of the MII_ADVERTISE register
 *
 * A small helper function that translates MII_ADVERTISE bits
 * to ethtool advertisement settings.
 */
static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
{
	u32 result = 0;

	if (adv & ADVERTISE_10HALF)
		result |= ADVERTISED_10baseT_Half;
	if (adv & ADVERTISE_10FULL)
		result |= ADVERTISED_10baseT_Full;
	if (adv & ADVERTISE_100HALF)
		result |= ADVERTISED_100baseT_Half;
	if (adv & ADVERTISE_100FULL)
		result |= ADVERTISED_100baseT_Full;
	if (adv & ADVERTISE_PAUSE_CAP)
		result |= ADVERTISED_Pause;
	if (adv & ADVERTISE_PAUSE_ASYM)
		result |= ADVERTISED_Asym_Pause;

	return result;
}

/**
 * ethtool_adv_to_mii_ctrl1000_t
 * @ethadv: the ethtool advertisement settings
 *
 * A small helper function that translates ethtool advertisement
 * settings to phy autonegotiation advertisements for the
 * MII_CTRL1000 register when in 1000T mode.
 */
static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
{
	u32 result = 0;

	if (ethadv & ADVERTISED_1000baseT_Half)
		result |= ADVERTISE_1000HALF;
	if (ethadv & ADVERTISED_1000baseT_Full)
		result |= ADVERTISE_1000FULL;

	return result;
}

/**
 * linkmode_adv_to_mii_ctrl1000_t
 * @advertising: the linkmode advertisement settings
 *
 * A small helper function that translates linkmode advertisement
 * settings to phy autonegotiation advertisements for the
 * MII_CTRL1000 register when in 1000T mode.
 */
static inline u32
linkmode_adv_to_mii_ctrl1000_t(const unsigned long *advertising)
{
	u32 result = 0;

	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
			      advertising))
		result |= ADVERTISE_1000HALF;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
			      advertising))
		result |= ADVERTISE_1000FULL;

	return result;
}

/**
 * mii_ctrl1000_to_ethtool_adv_t
 * @adv: value of the MII_CTRL1000 register
 *
 * A small helper function that translates MII_CTRL1000
 * bits, when in 1000Base-T mode, to ethtool
 * advertisement settings.
 */
static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
{
	u32 result = 0;

	if (adv & ADVERTISE_1000HALF)
		result |= ADVERTISED_1000baseT_Half;
	if (adv & ADVERTISE_1000FULL)
		result |= ADVERTISED_1000baseT_Full;

	return result;
}

/**
 * mii_lpa_to_ethtool_lpa_t
 * @adv: value of the MII_LPA register
 *
 * A small helper function that translates MII_LPA
 * bits, when in 1000Base-T mode, to ethtool
 * LP advertisement settings.
 */
static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
{
	u32 result = 0;

	if (lpa & LPA_LPACK)
		result |= ADVERTISED_Autoneg;

	return result | mii_adv_to_ethtool_adv_t(lpa);
}

/**
 * mii_stat1000_to_ethtool_lpa_t
 * @adv: value of the MII_STAT1000 register
 *
 * A small helper function that translates MII_STAT1000
 * bits, when in 1000Base-T mode, to ethtool
 * advertisement settings.
 */
static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
{
	u32 result = 0;

	if (lpa & LPA_1000HALF)
		result |= ADVERTISED_1000baseT_Half;
	if (lpa & LPA_1000FULL)
		result |= ADVERTISED_1000baseT_Full;

	return result;
}

/**
 * mii_stat1000_mod_linkmode_lpa_t
 * @advertising: target the linkmode advertisement settings
 * @adv: value of the MII_STAT1000 register
 *
 * A small helper function that translates MII_STAT1000 bits, when in
 * 1000Base-T mode, to linkmode advertisement settings. Other bits in
 * advertising are not changes.
 */
static inline void mii_stat1000_mod_linkmode_lpa_t(unsigned long *advertising,
						   u32 lpa)
{
	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
			 advertising, lpa & LPA_1000HALF);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
			 advertising, lpa & LPA_1000FULL);
}

/**
 * ethtool_adv_to_mii_adv_x
 * @ethadv: the ethtool advertisement settings
 *
 * A small helper function that translates ethtool advertisement
 * settings to phy autonegotiation advertisements for the
 * MII_CTRL1000 register when in 1000Base-X mode.
 */
static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
{
	u32 result = 0;

	if (ethadv & ADVERTISED_1000baseT_Half)
		result |= ADVERTISE_1000XHALF;
	if (ethadv & ADVERTISED_1000baseT_Full)
		result |= ADVERTISE_1000XFULL;
	if (ethadv & ADVERTISED_Pause)
		result |= ADVERTISE_1000XPAUSE;
	if (ethadv & ADVERTISED_Asym_Pause)
		result |= ADVERTISE_1000XPSE_ASYM;

	return result;
}

/**
 * mii_adv_to_ethtool_adv_x
 * @adv: value of the MII_CTRL1000 register
 *
 * A small helper function that translates MII_CTRL1000
 * bits, when in 1000Base-X mode, to ethtool
 * advertisement settings.
 */
static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
{
	u32 result = 0;

	if (adv & ADVERTISE_1000XHALF)
		result |= ADVERTISED_1000baseT_Half;
	if (adv & ADVERTISE_1000XFULL)
		result |= ADVERTISED_1000baseT_Full;
	if (adv & ADVERTISE_1000XPAUSE)
		result |= ADVERTISED_Pause;
	if (adv & ADVERTISE_1000XPSE_ASYM)
		result |= ADVERTISED_Asym_Pause;

	return result;
}

/**
 * mii_adv_mod_linkmode_adv_t
 * @advertising:pointer to destination link mode.
 * @adv: value of the MII_ADVERTISE register
 *
 * A small helper function that translates MII_ADVERTISE bits to
 * linkmode advertisement settings. Leaves other bits unchanged.
 */
static inline void mii_adv_mod_linkmode_adv_t(unsigned long *advertising,
					      u32 adv)
{
	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
			 advertising, adv & ADVERTISE_10HALF);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
			 advertising, adv & ADVERTISE_10FULL);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
			 advertising, adv & ADVERTISE_100HALF);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
			 advertising, adv & ADVERTISE_100FULL);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
			 adv & ADVERTISE_PAUSE_CAP);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
			 advertising, adv & ADVERTISE_PAUSE_ASYM);
}

/**
 * mii_adv_to_linkmode_adv_t
 * @advertising:pointer to destination link mode.
 * @adv: value of the MII_ADVERTISE register
 *
 * A small helper function that translates MII_ADVERTISE bits
 * to linkmode advertisement settings. Clears the old value
 * of advertising.
 */
static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising,
					     u32 adv)
{
	linkmode_zero(advertising);

	mii_adv_mod_linkmode_adv_t(advertising, adv);
}

/**
 * mii_lpa_to_linkmode_lpa_t
 * @adv: value of the MII_LPA register
 *
 * A small helper function that translates MII_LPA bits, when in
 * 1000Base-T mode, to linkmode LP advertisement settings. Clears the
 * old value of advertising
 */
static inline void mii_lpa_to_linkmode_lpa_t(unsigned long *lp_advertising,
					     u32 lpa)
{
	mii_adv_to_linkmode_adv_t(lp_advertising, lpa);

	if (lpa & LPA_LPACK)
		linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
				 lp_advertising);

}

/**
 * mii_lpa_mod_linkmode_lpa_t
 * @adv: value of the MII_LPA register
 *
 * A small helper function that translates MII_LPA bits, when in
 * 1000Base-T mode, to linkmode LP advertisement settings. Leaves
 * other bits unchanged.
 */
static inline void mii_lpa_mod_linkmode_lpa_t(unsigned long *lp_advertising,
					      u32 lpa)
{
	mii_adv_mod_linkmode_adv_t(lp_advertising, lpa);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
			 lp_advertising, lpa & LPA_LPACK);
}

static inline void mii_ctrl1000_mod_linkmode_adv_t(unsigned long *advertising,
						   u32 ctrl1000)
{
	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, advertising,
			 ctrl1000 & ADVERTISE_1000HALF);
	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, advertising,
			 ctrl1000 & ADVERTISE_1000FULL);
}

/**
 * linkmode_adv_to_lcl_adv_t
 * @advertising:pointer to linkmode advertising
 *
 * A small helper function that translates linkmode advertising to LVL
 * pause capabilities.
 */
static inline u32 linkmode_adv_to_lcl_adv_t(const unsigned long *advertising)
{
	u32 lcl_adv = 0;

	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
			      advertising))
		lcl_adv |= ADVERTISE_PAUSE_CAP;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
			      advertising))
		lcl_adv |= ADVERTISE_PAUSE_ASYM;

	return lcl_adv;
}

/**
 * mii_lpa_mod_linkmode_x - decode the link partner's config_reg to linkmodes
 * @linkmodes: link modes array
 * @lpa: config_reg word from link partner
 * @fd_bit: link mode for 1000XFULL bit
 */
static inline void mii_lpa_mod_linkmode_x(unsigned long *linkmodes, u16 lpa,
					 int fd_bit)
{
	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, linkmodes,
			 lpa & LPA_LPACK);
	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes,
			 lpa & LPA_1000XPAUSE);
	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes,
			 lpa & LPA_1000XPAUSE_ASYM);
	linkmode_mod_bit(fd_bit, linkmodes,
			 lpa & LPA_1000XFULL);
}

/**
 * linkmode_adv_to_mii_adv_x - encode a linkmode to config_reg
 * @linkmodes: linkmodes
 * @fd_bit: full duplex bit
 */
static inline u16 linkmode_adv_to_mii_adv_x(const unsigned long *linkmodes,
					    int fd_bit)
{
	u16 adv = 0;

	if (linkmode_test_bit(fd_bit, linkmodes))
		adv |= ADVERTISE_1000XFULL;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes))
		adv |= ADVERTISE_1000XPAUSE;
	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes))
		adv |= ADVERTISE_1000XPSE_ASYM;

	return adv;
}

/**
 * mii_advertise_flowctrl - get flow control advertisement flags
 * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
 */
static inline u16 mii_advertise_flowctrl(int cap)
{
	u16 adv = 0;

	if (cap & FLOW_CTRL_RX)
		adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
	if (cap & FLOW_CTRL_TX)
		adv ^= ADVERTISE_PAUSE_ASYM;

	return adv;
}

/**
 * mii_resolve_flowctrl_fdx
 * @lcladv: value of MII ADVERTISE register
 * @rmtadv: value of MII LPA register
 *
 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
 */
static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
{
	u8 cap = 0;

	if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
		cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
	} else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
		if (lcladv & ADVERTISE_PAUSE_CAP)
			cap = FLOW_CTRL_RX;
		else if (rmtadv & ADVERTISE_PAUSE_CAP)
			cap = FLOW_CTRL_TX;
	}

	return cap;
}

/**
 * mii_bmcr_encode_fixed - encode fixed speed/duplex settings to a BMCR value
 * @speed: a SPEED_* value
 * @duplex: a DUPLEX_* value
 *
 * Encode the speed and duplex to a BMCR value. 2500, 1000, 100 and 10 Mbps are
 * supported. 2500Mbps is encoded to 1000Mbps. Other speeds are encoded as 10
 * Mbps. Unknown duplex values are encoded to half-duplex.
 */
static inline u16 mii_bmcr_encode_fixed(int speed, int duplex)
{
	u16 bmcr;

	switch (speed) {
	case SPEED_2500:
	case SPEED_1000:
		bmcr = BMCR_SPEED1000;
		break;

	case SPEED_100:
		bmcr = BMCR_SPEED100;
		break;

	case SPEED_10:
	default:
		bmcr = BMCR_SPEED10;
		break;
	}

	if (duplex == DUPLEX_FULL)
		bmcr |= BMCR_FULLDPLX;

	return bmcr;
}

#endif /* __LINUX_MII_H__ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* linux/mii.h: definitions for MII-compatible transceivers
	4	* Originally drivers/net/sunhme.h.
	5	*
	6	* Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
	7	*/
1da177e4 LT	8	#ifndef __LINUX_MII_H__
	9	#define __LINUX_MII_H__
	10
c3ce7e20 DW	11
c3ce7e20 DW	12	#include <linux/if.h>
b31cdffa	13	#include <linux/linkmode.h>
607ca46e	14	#include <uapi/linux/mii.h>
c3ce7e20 DW	15
	16	struct ethtool_cmd;
	17
1da177e4 LT	18	struct mii_if_info {
	19	int phy_id;
	20	int advertising;
	21	int phy_id_mask;
	22	int reg_num_mask;
	23
	24	unsigned int full_duplex : 1; /* is full duplex? */
	25	unsigned int force_media : 1; /* is autoneg. disabled? */
	26	unsigned int supports_gmii : 1; /* are GMII registers supported? */
	27
	28	struct net_device *dev;
	29	int (mdio_read) (struct net_device dev, int phy_id, int location);
	30	void (mdio_write) (struct net_device dev, int phy_id, int location, int val);
	31	};
	32
1da177e4 LT	33	extern int mii_link_ok (struct mii_if_info *mii);
1da177e4 LT	34	extern int mii_nway_restart (struct mii_if_info *mii);
2274af1d	35	extern void mii_ethtool_gset(struct mii_if_info mii, struct ethtool_cmd ecmd);
82c01a84	36	extern void mii_ethtool_get_link_ksettings(
bc8ee596	37	struct mii_if_info mii, struct ethtool_link_ksettings cmd);
1da177e4	38	extern int mii_ethtool_sset(struct mii_if_info mii, struct ethtool_cmd ecmd);
bc8ee596 PR	39	extern int mii_ethtool_set_link_ksettings(
bc8ee596 PR	40	struct mii_if_info mii, const struct ethtool_link_ksettings cmd);
43ec6e95	41	extern int mii_check_gmii_support(struct mii_if_info *mii);
1da177e4 LT	42	extern void mii_check_link (struct mii_if_info *mii);
	43	extern unsigned int mii_check_media (struct mii_if_info *mii,
	44	unsigned int ok_to_print,
	45	unsigned int init_media);
	46	extern int generic_mii_ioctl(struct mii_if_info *mii_if,
c44f7eb4	47	struct mii_ioctl_data *mii_data, int cmd,
1da177e4 LT	48	unsigned int *duplex_changed);
	49
	50
1da177e4 LT	51	static inline struct mii_ioctl_data if_mii(struct ifreq rq)
	52	{
	53	return (struct mii_ioctl_data *) &rq->ifr_ifru;
	54	}
	55
1da177e4 LT	56	/**
	57	* mii_nway_result
	58	* @negotiated: value of MII ANAR and'd with ANLPAR
	59	*
	60	* Given a set of MII abilities, check each bit and returns the
	61	* currently supported media, in the priority order defined by
	62	* IEEE 802.3u. We use LPA_xxx constants but note this is not the
	63	* value of LPA solely, as described above.
	64	*
	65	* The one exception to IEEE 802.3u is that 100baseT4 is placed
	66	* between 100T-full and 100T-half. If your phy does not support
	67	* 100T4 this is fine. If your phy places 100T4 elsewhere in the
	68	* priority order, you will need to roll your own function.
	69	*/
	70	static inline unsigned int mii_nway_result (unsigned int negotiated)
	71	{
	72	unsigned int ret;
	73
	74	if (negotiated & LPA_100FULL)
	75	ret = LPA_100FULL;
	76	else if (negotiated & LPA_100BASE4)
	77	ret = LPA_100BASE4;
	78	else if (negotiated & LPA_100HALF)
	79	ret = LPA_100HALF;
	80	else if (negotiated & LPA_10FULL)
	81	ret = LPA_10FULL;
	82	else
	83	ret = LPA_10HALF;
	84
	85	return ret;
	86	}
	87
	88	/**
	89	* mii_duplex
	90	* @duplex_lock: Non-zero if duplex is locked at full
	91	* @negotiated: value of MII ANAR and'd with ANLPAR
	92	*
	93	* A small helper function for a common case. Returns one
	94	* if the media is operating or locked at full duplex, and
	95	* returns zero otherwise.
	96	*/
	97	static inline unsigned int mii_duplex (unsigned int duplex_lock,
	98	unsigned int negotiated)
	99	{
	100	if (duplex_lock)
	101	return 1;
	102	if (mii_nway_result(negotiated) & LPA_DUPLEX)
	103	return 1;
	104	return 0;
	105	}
	106
28011cf1	107	/**
37f07023	108	* ethtool_adv_to_mii_adv_t
28011cf1 MC	109	* @ethadv: the ethtool advertisement settings
	110	*
	111	* A small helper function that translates ethtool advertisement
	112	* settings to phy autonegotiation advertisements for the
	113	* MII_ADVERTISE register.
	114	*/
37f07023	115	static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
28011cf1 MC	116	{
	117	u32 result = 0;
	118
	119	if (ethadv & ADVERTISED_10baseT_Half)
	120	result \|= ADVERTISE_10HALF;
	121	if (ethadv & ADVERTISED_10baseT_Full)
	122	result \|= ADVERTISE_10FULL;
	123	if (ethadv & ADVERTISED_100baseT_Half)
	124	result \|= ADVERTISE_100HALF;
	125	if (ethadv & ADVERTISED_100baseT_Full)
	126	result \|= ADVERTISE_100FULL;
	127	if (ethadv & ADVERTISED_Pause)
	128	result \|= ADVERTISE_PAUSE_CAP;
	129	if (ethadv & ADVERTISED_Asym_Pause)
	130	result \|= ADVERTISE_PAUSE_ASYM;
	131
	132	return result;
	133	}
	134
f954a04e AL	135	/**
	136	* linkmode_adv_to_mii_adv_t
	137	* @advertising: the linkmode advertisement settings
	138	*
	139	* A small helper function that translates linkmode advertisement
	140	* settings to phy autonegotiation advertisements for the
	141	* MII_ADVERTISE register.
	142	*/
aa9fbc5d	143	static inline u32 linkmode_adv_to_mii_adv_t(const unsigned long *advertising)
f954a04e AL	144	{
	145	u32 result = 0;
	146
	147	if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, advertising))
	148	result \|= ADVERTISE_10HALF;
	149	if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, advertising))
	150	result \|= ADVERTISE_10FULL;
	151	if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, advertising))
	152	result \|= ADVERTISE_100HALF;
	153	if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, advertising))
	154	result \|= ADVERTISE_100FULL;
	155	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
	156	result \|= ADVERTISE_PAUSE_CAP;
	157	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
	158	result \|= ADVERTISE_PAUSE_ASYM;
	159
	160	return result;
	161	}
	162
28011cf1	163	/**
37f07023	164	* mii_adv_to_ethtool_adv_t
28011cf1 MC	165	* @adv: value of the MII_ADVERTISE register
	166	*
	167	* A small helper function that translates MII_ADVERTISE bits
	168	* to ethtool advertisement settings.
	169	*/
37f07023	170	static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
28011cf1 MC	171	{
	172	u32 result = 0;
	173
	174	if (adv & ADVERTISE_10HALF)
	175	result \|= ADVERTISED_10baseT_Half;
	176	if (adv & ADVERTISE_10FULL)
	177	result \|= ADVERTISED_10baseT_Full;
	178	if (adv & ADVERTISE_100HALF)
	179	result \|= ADVERTISED_100baseT_Half;
	180	if (adv & ADVERTISE_100FULL)
	181	result \|= ADVERTISED_100baseT_Full;
	182	if (adv & ADVERTISE_PAUSE_CAP)
	183	result \|= ADVERTISED_Pause;
	184	if (adv & ADVERTISE_PAUSE_ASYM)
	185	result \|= ADVERTISED_Asym_Pause;
	186
	187	return result;
	188	}
	189
	190	/**
37f07023	191	* ethtool_adv_to_mii_ctrl1000_t
28011cf1 MC	192	* @ethadv: the ethtool advertisement settings
	193	*
	194	* A small helper function that translates ethtool advertisement
	195	* settings to phy autonegotiation advertisements for the
	196	* MII_CTRL1000 register when in 1000T mode.
	197	*/
37f07023	198	static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
28011cf1 MC	199	{
	200	u32 result = 0;
	201
	202	if (ethadv & ADVERTISED_1000baseT_Half)
	203	result \|= ADVERTISE_1000HALF;
	204	if (ethadv & ADVERTISED_1000baseT_Full)
	205	result \|= ADVERTISE_1000FULL;
	206
	207	return result;
	208	}
	209
f954a04e AL	210	/**
f954a04e AL	211	* linkmode_adv_to_mii_ctrl1000_t
fe191914	212	* @advertising: the linkmode advertisement settings
f954a04e AL	213	*
	214	* A small helper function that translates linkmode advertisement
	215	* settings to phy autonegotiation advertisements for the
	216	* MII_CTRL1000 register when in 1000T mode.
	217	*/
aa9fbc5d RKO	218	static inline u32
aa9fbc5d RKO	219	linkmode_adv_to_mii_ctrl1000_t(const unsigned long *advertising)
f954a04e AL	220	{
	221	u32 result = 0;
	222
	223	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
	224	advertising))
	225	result \|= ADVERTISE_1000HALF;
	226	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
	227	advertising))
	228	result \|= ADVERTISE_1000FULL;
	229
	230	return result;
	231	}
	232
28011cf1	233	/**
37f07023	234	* mii_ctrl1000_to_ethtool_adv_t
28011cf1 MC	235	* @adv: value of the MII_CTRL1000 register
	236	*
	237	* A small helper function that translates MII_CTRL1000
	238	* bits, when in 1000Base-T mode, to ethtool
	239	* advertisement settings.
	240	*/
37f07023	241	static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
28011cf1 MC	242	{
	243	u32 result = 0;
	244
	245	if (adv & ADVERTISE_1000HALF)
	246	result \|= ADVERTISED_1000baseT_Half;
	247	if (adv & ADVERTISE_1000FULL)
	248	result \|= ADVERTISED_1000baseT_Full;
	249
	250	return result;
	251	}
	252
37f07023 MC	253	/**
	254	* mii_lpa_to_ethtool_lpa_t
	255	* @adv: value of the MII_LPA register
	256	*
	257	* A small helper function that translates MII_LPA
	258	* bits, when in 1000Base-T mode, to ethtool
	259	* LP advertisement settings.
	260	*/
	261	static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
	262	{
	263	u32 result = 0;
	264
	265	if (lpa & LPA_LPACK)
	266	result \|= ADVERTISED_Autoneg;
	267
	268	return result \| mii_adv_to_ethtool_adv_t(lpa);
	269	}
28011cf1 MC	270
28011cf1 MC	271	/**
37f07023	272	* mii_stat1000_to_ethtool_lpa_t
28011cf1 MC	273	* @adv: value of the MII_STAT1000 register
	274	*
	275	* A small helper function that translates MII_STAT1000
	276	* bits, when in 1000Base-T mode, to ethtool
	277	* advertisement settings.
	278	*/
37f07023	279	static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
28011cf1 MC	280	{
	281	u32 result = 0;
	282
	283	if (lpa & LPA_1000HALF)
	284	result \|= ADVERTISED_1000baseT_Half;
	285	if (lpa & LPA_1000FULL)
	286	result \|= ADVERTISED_1000baseT_Full;
	287
	288	return result;
	289	}
	290
c0ec3c27	291	/**
78a24df3	292	* mii_stat1000_mod_linkmode_lpa_t
c0ec3c27 AL	293	* @advertising: target the linkmode advertisement settings
	294	* @adv: value of the MII_STAT1000 register
	295	*
	296	* A small helper function that translates MII_STAT1000 bits, when in
78a24df3 AL	297	* 1000Base-T mode, to linkmode advertisement settings. Other bits in
78a24df3 AL	298	* advertising are not changes.
c0ec3c27	299	*/
78a24df3 AL	300	static inline void mii_stat1000_mod_linkmode_lpa_t(unsigned long *advertising,
78a24df3 AL	301	u32 lpa)
c0ec3c27	302	{
78a24df3 AL	303	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
	304	advertising, lpa & LPA_1000HALF);
	305
	306	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
	307	advertising, lpa & LPA_1000FULL);
c0ec3c27 AL	308	}
c0ec3c27 AL	309
28011cf1	310	/**
37f07023	311	* ethtool_adv_to_mii_adv_x
28011cf1 MC	312	* @ethadv: the ethtool advertisement settings
	313	*
	314	* A small helper function that translates ethtool advertisement
	315	* settings to phy autonegotiation advertisements for the
	316	* MII_CTRL1000 register when in 1000Base-X mode.
	317	*/
37f07023	318	static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
28011cf1 MC	319	{
	320	u32 result = 0;
	321
	322	if (ethadv & ADVERTISED_1000baseT_Half)
	323	result \|= ADVERTISE_1000XHALF;
	324	if (ethadv & ADVERTISED_1000baseT_Full)
	325	result \|= ADVERTISE_1000XFULL;
	326	if (ethadv & ADVERTISED_Pause)
	327	result \|= ADVERTISE_1000XPAUSE;
	328	if (ethadv & ADVERTISED_Asym_Pause)
	329	result \|= ADVERTISE_1000XPSE_ASYM;
	330
	331	return result;
	332	}
	333
	334	/**
37f07023	335	* mii_adv_to_ethtool_adv_x
28011cf1 MC	336	* @adv: value of the MII_CTRL1000 register
	337	*
	338	* A small helper function that translates MII_CTRL1000
	339	* bits, when in 1000Base-X mode, to ethtool
	340	* advertisement settings.
	341	*/
37f07023	342	static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
28011cf1 MC	343	{
	344	u32 result = 0;
	345
	346	if (adv & ADVERTISE_1000XHALF)
	347	result \|= ADVERTISED_1000baseT_Half;
	348	if (adv & ADVERTISE_1000XFULL)
	349	result \|= ADVERTISED_1000baseT_Full;
	350	if (adv & ADVERTISE_1000XPAUSE)
	351	result \|= ADVERTISED_Pause;
	352	if (adv & ADVERTISE_1000XPSE_ASYM)
	353	result \|= ADVERTISED_Asym_Pause;
	354
	355	return result;
	356	}
	357
d3351931 AL	358	/**
	359	* mii_adv_mod_linkmode_adv_t
	360	* @advertising:pointer to destination link mode.
	361	* @adv: value of the MII_ADVERTISE register
	362	*
	363	* A small helper function that translates MII_ADVERTISE bits to
	364	* linkmode advertisement settings. Leaves other bits unchanged.
	365	*/
	366	static inline void mii_adv_mod_linkmode_adv_t(unsigned long *advertising,
	367	u32 adv)
	368	{
	369	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
	370	advertising, adv & ADVERTISE_10HALF);
	371
	372	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
	373	advertising, adv & ADVERTISE_10FULL);
	374
	375	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
	376	advertising, adv & ADVERTISE_100HALF);
	377
	378	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
	379	advertising, adv & ADVERTISE_100FULL);
	380
	381	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
	382	adv & ADVERTISE_PAUSE_CAP);
	383
	384	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
	385	advertising, adv & ADVERTISE_PAUSE_ASYM);
	386	}
	387
edc7ccbb AL	388	/**
	389	* mii_adv_to_linkmode_adv_t
	390	* @advertising:pointer to destination link mode.
	391	* @adv: value of the MII_ADVERTISE register
	392	*
	393	* A small helper function that translates MII_ADVERTISE bits
5f15eed2 AL	394	* to linkmode advertisement settings. Clears the old value
5f15eed2 AL	395	* of advertising.
edc7ccbb AL	396	*/
	397	static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising,
	398	u32 adv)
	399	{
	400	linkmode_zero(advertising);
	401
d3351931	402	mii_adv_mod_linkmode_adv_t(advertising, adv);
edc7ccbb AL	403	}
edc7ccbb AL	404
c0ec3c27 AL	405	/**
	406	* mii_lpa_to_linkmode_lpa_t
	407	* @adv: value of the MII_LPA register
	408	*
	409	* A small helper function that translates MII_LPA bits, when in
5f15eed2 AL	410	* 1000Base-T mode, to linkmode LP advertisement settings. Clears the
5f15eed2 AL	411	* old value of advertising
c0ec3c27 AL	412	*/
	413	static inline void mii_lpa_to_linkmode_lpa_t(unsigned long *lp_advertising,
	414	u32 lpa)
	415	{
5f15eed2 AL	416	mii_adv_to_linkmode_adv_t(lp_advertising, lpa);
5f15eed2 AL	417
c0ec3c27 AL	418	if (lpa & LPA_LPACK)
	419	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
	420	lp_advertising);
	421
c0ec3c27 AL	422	}
c0ec3c27 AL	423
d3351931 AL	424	/**
	425	* mii_lpa_mod_linkmode_lpa_t
	426	* @adv: value of the MII_LPA register
	427	*
	428	* A small helper function that translates MII_LPA bits, when in
	429	* 1000Base-T mode, to linkmode LP advertisement settings. Leaves
	430	* other bits unchanged.
	431	*/
	432	static inline void mii_lpa_mod_linkmode_lpa_t(unsigned long *lp_advertising,
	433	u32 lpa)
	434	{
	435	mii_adv_mod_linkmode_adv_t(lp_advertising, lpa);
	436
6dbd0090 AL	437	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
6dbd0090 AL	438	lp_advertising, lpa & LPA_LPACK);
d3351931 AL	439	}
d3351931 AL	440
4cf6c57e RK	441	static inline void mii_ctrl1000_mod_linkmode_adv_t(unsigned long *advertising,
	442	u32 ctrl1000)
	443	{
	444	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, advertising,
	445	ctrl1000 & ADVERTISE_1000HALF);
	446	linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, advertising,
	447	ctrl1000 & ADVERTISE_1000FULL);
	448	}
	449
5f991f7b	450	/**
3c1bcc86 AL	451	* linkmode_adv_to_lcl_adv_t
3c1bcc86 AL	452	* @advertising:pointer to linkmode advertising
5f991f7b	453	*
3c1bcc86	454	* A small helper function that translates linkmode advertising to LVL
5f991f7b AL	455	* pause capabilities.
5f991f7b AL	456	*/
aa9fbc5d	457	static inline u32 linkmode_adv_to_lcl_adv_t(const unsigned long *advertising)
5f991f7b AL	458	{
	459	u32 lcl_adv = 0;
	460
3c1bcc86 AL	461	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3c1bcc86 AL	462	advertising))
5f991f7b	463	lcl_adv \|= ADVERTISE_PAUSE_CAP;
7f07e5f1	464	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3c1bcc86	465	advertising))
5f991f7b AL	466	lcl_adv \|= ADVERTISE_PAUSE_ASYM;
	467
	468	return lcl_adv;
	469	}
	470
f6554187 RK	471	/**
	472	* mii_lpa_mod_linkmode_x - decode the link partner's config_reg to linkmodes
	473	* @linkmodes: link modes array
	474	* @lpa: config_reg word from link partner
	475	* @fd_bit: link mode for 1000XFULL bit
	476	*/
	477	static inline void mii_lpa_mod_linkmode_x(unsigned long *linkmodes, u16 lpa,
	478	int fd_bit)
	479	{
	480	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, linkmodes,
	481	lpa & LPA_LPACK);
	482	linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes,
	483	lpa & LPA_1000XPAUSE);
	484	linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes,
	485	lpa & LPA_1000XPAUSE_ASYM);
	486	linkmode_mod_bit(fd_bit, linkmodes,
	487	lpa & LPA_1000XFULL);
	488	}
	489
a9f28eba RK	490	/**
	491	* linkmode_adv_to_mii_adv_x - encode a linkmode to config_reg
	492	* @linkmodes: linkmodes
	493	* @fd_bit: full duplex bit
	494	*/
	495	static inline u16 linkmode_adv_to_mii_adv_x(const unsigned long *linkmodes,
	496	int fd_bit)
	497	{
	498	u16 adv = 0;
	499
	500	if (linkmode_test_bit(fd_bit, linkmodes))
	501	adv \|= ADVERTISE_1000XFULL;
	502	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes))
	503	adv \|= ADVERTISE_1000XPAUSE;
	504	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes))
	505	adv \|= ADVERTISE_1000XPSE_ASYM;
	506
	507	return adv;
	508	}
	509
a8c30832 BH	510	/**
	511	* mii_advertise_flowctrl - get flow control advertisement flags
	512	* @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
	513	*/
	514	static inline u16 mii_advertise_flowctrl(int cap)
	515	{
	516	u16 adv = 0;
	517
	518	if (cap & FLOW_CTRL_RX)
	519	adv = ADVERTISE_PAUSE_CAP \| ADVERTISE_PAUSE_ASYM;
	520	if (cap & FLOW_CTRL_TX)
	521	adv ^= ADVERTISE_PAUSE_ASYM;
	522
	523	return adv;
	524	}
	525
bc02ff95 SG	526	/**
	527	* mii_resolve_flowctrl_fdx
	528	* @lcladv: value of MII ADVERTISE register
	529	* @rmtadv: value of MII LPA register
	530	*
	531	* Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
	532	*/
	533	static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
	534	{
	535	u8 cap = 0;
	536
44c22ee9 BH	537	if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
	538	cap = FLOW_CTRL_TX \| FLOW_CTRL_RX;
	539	} else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
	540	if (lcladv & ADVERTISE_PAUSE_CAP)
	541	cap = FLOW_CTRL_RX;
	542	else if (rmtadv & ADVERTISE_PAUSE_CAP)
bc02ff95 SG	543	cap = FLOW_CTRL_TX;
	544	}
	545
	546	return cap;
	547	}
	548
bdb6cfe7 RKO	549	/**
	550	* mii_bmcr_encode_fixed - encode fixed speed/duplex settings to a BMCR value
	551	* @speed: a SPEED_* value
	552	* @duplex: a DUPLEX_* value
	553	*
	554	* Encode the speed and duplex to a BMCR value. 2500, 1000, 100 and 10 Mbps are
	555	* supported. 2500Mbps is encoded to 1000Mbps. Other speeds are encoded as 10
	556	* Mbps. Unknown duplex values are encoded to half-duplex.
	557	*/
	558	static inline u16 mii_bmcr_encode_fixed(int speed, int duplex)
	559	{
	560	u16 bmcr;
	561
	562	switch (speed) {
	563	case SPEED_2500:
	564	case SPEED_1000:
	565	bmcr = BMCR_SPEED1000;
	566	break;
	567
	568	case SPEED_100:
	569	bmcr = BMCR_SPEED100;
	570	break;
	571
	572	case SPEED_10:
	573	default:
	574	bmcr = BMCR_SPEED10;
	575	break;
	576	}
	577
	578	if (duplex == DUPLEX_FULL)
	579	bmcr \|= BMCR_FULLDPLX;
	580
	581	return bmcr;
	582	}
	583
1da177e4	584	#endif /* __LINUX_MII_H__ */