585 lines
16 KiB
C
585 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/mii.h: definitions for MII-compatible transceivers
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* Originally drivers/net/sunhme.h.
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*
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* Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
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*/
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#ifndef __LINUX_MII_H__
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#define __LINUX_MII_H__
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#include <linux/if.h>
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#include <linux/linkmode.h>
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#include <uapi/linux/mii.h>
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struct ethtool_cmd;
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struct mii_if_info {
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int phy_id;
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int advertising;
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int phy_id_mask;
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int reg_num_mask;
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unsigned int full_duplex : 1; /* is full duplex? */
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unsigned int force_media : 1; /* is autoneg. disabled? */
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unsigned int supports_gmii : 1; /* are GMII registers supported? */
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struct net_device *dev;
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int (*mdio_read) (struct net_device *dev, int phy_id, int location);
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void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
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};
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extern int mii_link_ok (struct mii_if_info *mii);
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extern int mii_nway_restart (struct mii_if_info *mii);
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extern void mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
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extern void mii_ethtool_get_link_ksettings(
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struct mii_if_info *mii, struct ethtool_link_ksettings *cmd);
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extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
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extern int mii_ethtool_set_link_ksettings(
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struct mii_if_info *mii, const struct ethtool_link_ksettings *cmd);
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extern int mii_check_gmii_support(struct mii_if_info *mii);
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extern void mii_check_link (struct mii_if_info *mii);
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extern unsigned int mii_check_media (struct mii_if_info *mii,
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unsigned int ok_to_print,
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unsigned int init_media);
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extern int generic_mii_ioctl(struct mii_if_info *mii_if,
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struct mii_ioctl_data *mii_data, int cmd,
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unsigned int *duplex_changed);
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static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
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{
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return (struct mii_ioctl_data *) &rq->ifr_ifru;
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}
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/**
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* mii_nway_result
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* @negotiated: value of MII ANAR and'd with ANLPAR
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*
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* Given a set of MII abilities, check each bit and returns the
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* currently supported media, in the priority order defined by
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* IEEE 802.3u. We use LPA_xxx constants but note this is not the
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* value of LPA solely, as described above.
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*
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* The one exception to IEEE 802.3u is that 100baseT4 is placed
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* between 100T-full and 100T-half. If your phy does not support
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* 100T4 this is fine. If your phy places 100T4 elsewhere in the
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* priority order, you will need to roll your own function.
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*/
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static inline unsigned int mii_nway_result (unsigned int negotiated)
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{
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unsigned int ret;
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if (negotiated & LPA_100FULL)
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ret = LPA_100FULL;
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else if (negotiated & LPA_100BASE4)
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ret = LPA_100BASE4;
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else if (negotiated & LPA_100HALF)
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ret = LPA_100HALF;
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else if (negotiated & LPA_10FULL)
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ret = LPA_10FULL;
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else
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ret = LPA_10HALF;
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return ret;
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}
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/**
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* mii_duplex
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* @duplex_lock: Non-zero if duplex is locked at full
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* @negotiated: value of MII ANAR and'd with ANLPAR
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*
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* A small helper function for a common case. Returns one
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* if the media is operating or locked at full duplex, and
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* returns zero otherwise.
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*/
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static inline unsigned int mii_duplex (unsigned int duplex_lock,
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unsigned int negotiated)
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{
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if (duplex_lock)
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return 1;
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if (mii_nway_result(negotiated) & LPA_DUPLEX)
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return 1;
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return 0;
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}
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/**
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* ethtool_adv_to_mii_adv_t
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* @ethadv: the ethtool advertisement settings
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*
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* A small helper function that translates ethtool advertisement
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* settings to phy autonegotiation advertisements for the
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* MII_ADVERTISE register.
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*/
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static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
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{
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u32 result = 0;
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if (ethadv & ADVERTISED_10baseT_Half)
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result |= ADVERTISE_10HALF;
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if (ethadv & ADVERTISED_10baseT_Full)
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result |= ADVERTISE_10FULL;
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if (ethadv & ADVERTISED_100baseT_Half)
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result |= ADVERTISE_100HALF;
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if (ethadv & ADVERTISED_100baseT_Full)
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result |= ADVERTISE_100FULL;
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if (ethadv & ADVERTISED_Pause)
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result |= ADVERTISE_PAUSE_CAP;
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if (ethadv & ADVERTISED_Asym_Pause)
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result |= ADVERTISE_PAUSE_ASYM;
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return result;
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}
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/**
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* linkmode_adv_to_mii_adv_t
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* @advertising: the linkmode advertisement settings
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*
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* A small helper function that translates linkmode advertisement
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* settings to phy autonegotiation advertisements for the
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* MII_ADVERTISE register.
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*/
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static inline u32 linkmode_adv_to_mii_adv_t(const unsigned long *advertising)
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{
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u32 result = 0;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, advertising))
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result |= ADVERTISE_10HALF;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, advertising))
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result |= ADVERTISE_10FULL;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, advertising))
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result |= ADVERTISE_100HALF;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, advertising))
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result |= ADVERTISE_100FULL;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
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result |= ADVERTISE_PAUSE_CAP;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
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result |= ADVERTISE_PAUSE_ASYM;
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return result;
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}
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/**
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* mii_adv_to_ethtool_adv_t
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* @adv: value of the MII_ADVERTISE register
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*
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* A small helper function that translates MII_ADVERTISE bits
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* to ethtool advertisement settings.
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*/
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static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
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{
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u32 result = 0;
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if (adv & ADVERTISE_10HALF)
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result |= ADVERTISED_10baseT_Half;
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if (adv & ADVERTISE_10FULL)
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result |= ADVERTISED_10baseT_Full;
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if (adv & ADVERTISE_100HALF)
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result |= ADVERTISED_100baseT_Half;
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if (adv & ADVERTISE_100FULL)
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result |= ADVERTISED_100baseT_Full;
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if (adv & ADVERTISE_PAUSE_CAP)
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result |= ADVERTISED_Pause;
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if (adv & ADVERTISE_PAUSE_ASYM)
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result |= ADVERTISED_Asym_Pause;
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return result;
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}
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/**
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* ethtool_adv_to_mii_ctrl1000_t
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* @ethadv: the ethtool advertisement settings
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*
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* A small helper function that translates ethtool advertisement
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* settings to phy autonegotiation advertisements for the
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* MII_CTRL1000 register when in 1000T mode.
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*/
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static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
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{
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u32 result = 0;
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if (ethadv & ADVERTISED_1000baseT_Half)
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result |= ADVERTISE_1000HALF;
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if (ethadv & ADVERTISED_1000baseT_Full)
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result |= ADVERTISE_1000FULL;
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return result;
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}
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/**
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* linkmode_adv_to_mii_ctrl1000_t
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* @advertising: the linkmode advertisement settings
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*
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* A small helper function that translates linkmode advertisement
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* settings to phy autonegotiation advertisements for the
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* MII_CTRL1000 register when in 1000T mode.
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*/
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static inline u32
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linkmode_adv_to_mii_ctrl1000_t(const unsigned long *advertising)
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{
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u32 result = 0;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
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advertising))
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result |= ADVERTISE_1000HALF;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
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advertising))
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result |= ADVERTISE_1000FULL;
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return result;
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}
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/**
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* mii_ctrl1000_to_ethtool_adv_t
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* @adv: value of the MII_CTRL1000 register
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*
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* A small helper function that translates MII_CTRL1000
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* bits, when in 1000Base-T mode, to ethtool
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* advertisement settings.
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*/
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static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
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{
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u32 result = 0;
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if (adv & ADVERTISE_1000HALF)
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result |= ADVERTISED_1000baseT_Half;
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if (adv & ADVERTISE_1000FULL)
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result |= ADVERTISED_1000baseT_Full;
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return result;
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}
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/**
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* mii_lpa_to_ethtool_lpa_t
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* @adv: value of the MII_LPA register
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*
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* A small helper function that translates MII_LPA
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* bits, when in 1000Base-T mode, to ethtool
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* LP advertisement settings.
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*/
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static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
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{
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u32 result = 0;
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if (lpa & LPA_LPACK)
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result |= ADVERTISED_Autoneg;
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return result | mii_adv_to_ethtool_adv_t(lpa);
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}
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/**
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* mii_stat1000_to_ethtool_lpa_t
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* @adv: value of the MII_STAT1000 register
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*
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* A small helper function that translates MII_STAT1000
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* bits, when in 1000Base-T mode, to ethtool
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* advertisement settings.
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*/
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static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
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{
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u32 result = 0;
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if (lpa & LPA_1000HALF)
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result |= ADVERTISED_1000baseT_Half;
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if (lpa & LPA_1000FULL)
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result |= ADVERTISED_1000baseT_Full;
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return result;
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}
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/**
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* mii_stat1000_mod_linkmode_lpa_t
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* @advertising: target the linkmode advertisement settings
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* @adv: value of the MII_STAT1000 register
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*
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* A small helper function that translates MII_STAT1000 bits, when in
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* 1000Base-T mode, to linkmode advertisement settings. Other bits in
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* advertising are not changes.
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*/
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static inline void mii_stat1000_mod_linkmode_lpa_t(unsigned long *advertising,
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u32 lpa)
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{
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linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
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advertising, lpa & LPA_1000HALF);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
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advertising, lpa & LPA_1000FULL);
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}
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/**
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* ethtool_adv_to_mii_adv_x
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* @ethadv: the ethtool advertisement settings
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*
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* A small helper function that translates ethtool advertisement
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* settings to phy autonegotiation advertisements for the
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* MII_CTRL1000 register when in 1000Base-X mode.
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*/
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static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
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{
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u32 result = 0;
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if (ethadv & ADVERTISED_1000baseT_Half)
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result |= ADVERTISE_1000XHALF;
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if (ethadv & ADVERTISED_1000baseT_Full)
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result |= ADVERTISE_1000XFULL;
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if (ethadv & ADVERTISED_Pause)
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result |= ADVERTISE_1000XPAUSE;
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if (ethadv & ADVERTISED_Asym_Pause)
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result |= ADVERTISE_1000XPSE_ASYM;
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return result;
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}
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/**
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* mii_adv_to_ethtool_adv_x
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* @adv: value of the MII_CTRL1000 register
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*
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* A small helper function that translates MII_CTRL1000
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* bits, when in 1000Base-X mode, to ethtool
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* advertisement settings.
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*/
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static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
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{
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u32 result = 0;
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if (adv & ADVERTISE_1000XHALF)
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result |= ADVERTISED_1000baseT_Half;
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if (adv & ADVERTISE_1000XFULL)
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result |= ADVERTISED_1000baseT_Full;
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if (adv & ADVERTISE_1000XPAUSE)
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result |= ADVERTISED_Pause;
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if (adv & ADVERTISE_1000XPSE_ASYM)
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result |= ADVERTISED_Asym_Pause;
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return result;
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}
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/**
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* mii_adv_mod_linkmode_adv_t
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* @advertising:pointer to destination link mode.
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* @adv: value of the MII_ADVERTISE register
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*
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* A small helper function that translates MII_ADVERTISE bits to
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* linkmode advertisement settings. Leaves other bits unchanged.
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*/
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static inline void mii_adv_mod_linkmode_adv_t(unsigned long *advertising,
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u32 adv)
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{
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
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advertising, adv & ADVERTISE_10HALF);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
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advertising, adv & ADVERTISE_10FULL);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
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advertising, adv & ADVERTISE_100HALF);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
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advertising, adv & ADVERTISE_100FULL);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
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adv & ADVERTISE_PAUSE_CAP);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
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advertising, adv & ADVERTISE_PAUSE_ASYM);
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}
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/**
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* mii_adv_to_linkmode_adv_t
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* @advertising:pointer to destination link mode.
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* @adv: value of the MII_ADVERTISE register
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*
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* A small helper function that translates MII_ADVERTISE bits
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* to linkmode advertisement settings. Clears the old value
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* of advertising.
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*/
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static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising,
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u32 adv)
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{
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linkmode_zero(advertising);
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mii_adv_mod_linkmode_adv_t(advertising, adv);
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}
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/**
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* mii_lpa_to_linkmode_lpa_t
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* @adv: value of the MII_LPA register
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*
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* A small helper function that translates MII_LPA bits, when in
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* 1000Base-T mode, to linkmode LP advertisement settings. Clears the
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* old value of advertising
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*/
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static inline void mii_lpa_to_linkmode_lpa_t(unsigned long *lp_advertising,
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u32 lpa)
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{
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mii_adv_to_linkmode_adv_t(lp_advertising, lpa);
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if (lpa & LPA_LPACK)
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linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
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lp_advertising);
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}
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/**
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* mii_lpa_mod_linkmode_lpa_t
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* @adv: value of the MII_LPA register
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*
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* A small helper function that translates MII_LPA bits, when in
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* 1000Base-T mode, to linkmode LP advertisement settings. Leaves
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* other bits unchanged.
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*/
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static inline void mii_lpa_mod_linkmode_lpa_t(unsigned long *lp_advertising,
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u32 lpa)
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{
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mii_adv_mod_linkmode_adv_t(lp_advertising, lpa);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
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lp_advertising, lpa & LPA_LPACK);
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}
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static inline void mii_ctrl1000_mod_linkmode_adv_t(unsigned long *advertising,
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u32 ctrl1000)
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{
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linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, advertising,
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ctrl1000 & ADVERTISE_1000HALF);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, advertising,
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ctrl1000 & ADVERTISE_1000FULL);
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}
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/**
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* linkmode_adv_to_lcl_adv_t
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* @advertising:pointer to linkmode advertising
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*
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* A small helper function that translates linkmode advertising to LVL
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* pause capabilities.
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*/
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static inline u32 linkmode_adv_to_lcl_adv_t(const unsigned long *advertising)
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{
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u32 lcl_adv = 0;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
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advertising))
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lcl_adv |= ADVERTISE_PAUSE_CAP;
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if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
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advertising))
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lcl_adv |= ADVERTISE_PAUSE_ASYM;
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return lcl_adv;
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}
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/**
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* mii_lpa_mod_linkmode_x - decode the link partner's config_reg to linkmodes
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* @linkmodes: link modes array
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* @lpa: config_reg word from link partner
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* @fd_bit: link mode for 1000XFULL bit
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*/
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static inline void mii_lpa_mod_linkmode_x(unsigned long *linkmodes, u16 lpa,
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int fd_bit)
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{
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, linkmodes,
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lpa & LPA_LPACK);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes,
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lpa & LPA_1000XPAUSE);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes,
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lpa & LPA_1000XPAUSE_ASYM);
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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__ */
|