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linux-imx/include/linux/mii.h
Vladimir Oltean a87111adf5 net: mii: add C73 link mode and base page helpers 
IEEE 802.3 clause 73 defines auto-negotiation for backplanes and copper
cable assemblies. This is a medium type (link mode) just like Ethernet
over twisted pairs (BASE-T / BASE-TX) and over two wires for automotive
(BASE-T1) for which the PHY library currently contains support.

As a minimal framework for backplane PHY drivers, introduce a set of
helpers that parse and interpret the base pages that are exchanged by
PHYs during the clause 73 negotiation.

The placement in the "legacy" mii code is perhaps not the best, but I
tried to put them somewhere accessible by phylib, phylink and non-phylib
drivers. Note that phylink also has its own phylink_resolve_c73() which
is more or less similar in purpose, but:

- it requires constructing a struct phylink_link_state which is deeply
  embedded with the phylink API and that may not be desirable for
  drivers

- the presence of some link modes in phylink's own
  phylink_c73_priority_resolution[] is "interesting", like
  ETHTOOL_LINK_MODE_2500baseX_Full_BIT, which is not a backplane mode
  negotiable through C73 at all. That comes from the xpcs driver which
  may have a non-standard C73 autoneg, and this makes it difficult for
  me to e.g. refactor phylink_resolve_c73() to use the more generic
  linkmode_c73_priority_resolution(). Also see the attached link where I
  had previously pointed this out.

Link: https://lore.kernel.org/netdev/20230516090009.ssq3uedjl53kzsjr@skbuf/
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
2023-10-30 17:16:55 +08:00

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/* 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>
/* 802.3-2018 clause 73.6 Link codeword encoding */
#define C73_BASE_PAGE_SELECTOR(x) ((x) & GENMASK(4, 0))
#define C73_BASE_PAGE_ECHOED_NONCE(x) (((x) << 5) & GENMASK(9, 5))
#define C73_BASE_PAGE_ECHOED_NONCE_X(x) (((x) & GENMASK(9, 5)) >> 5)
#define C73_BASE_PAGE_ECHOED_NONCE_MSK GENMASK(9, 5)
#define C73_BASE_PAGE_PAUSE BIT(10)
#define C73_BASE_PAGE_ASM_DIR BIT(11)
#define C73_BASE_PAGE_RF BIT(13)
#define C73_BASE_PAGE_ACK BIT(14)
#define C73_BASE_PAGE_NP BIT(15)
#define C73_BASE_PAGE_TRANSMITTED_NONCE(x) (((x) << 16) & GENMASK(20, 16))
#define C73_BASE_PAGE_TRANSMITTED_NONCE_X(x) (((x) & GENMASK(20, 16)) >> 16)
#define C73_BASE_PAGE_TRANSMITTED_NONCE_MSK GENMASK(20, 16)
#define C73_BASE_PAGE_A(x) BIT(21 + (x))
#define C73_BASE_PAGE_TECH_ABL_1000BASEKX C73_BASE_PAGE_A(0)
#define C73_BASE_PAGE_TECH_ABL_10GBASEKX4 C73_BASE_PAGE_A(1)
#define C73_BASE_PAGE_TECH_ABL_10GBASEKR C73_BASE_PAGE_A(2)
#define C73_BASE_PAGE_TECH_ABL_40GBASEKR4 C73_BASE_PAGE_A(3)
#define C73_BASE_PAGE_TECH_ABL_40GBASECR4 C73_BASE_PAGE_A(4)
#define C73_BASE_PAGE_TECH_ABL_100GBASECR10 C73_BASE_PAGE_A(5)
#define C73_BASE_PAGE_TECH_ABL_100GBASEKP4 C73_BASE_PAGE_A(6)
#define C73_BASE_PAGE_TECH_ABL_100GBASEKR4 C73_BASE_PAGE_A(7)
#define C73_BASE_PAGE_TECH_ABL_100GBASECR4 C73_BASE_PAGE_A(8)
#define C73_BASE_PAGE_TECH_ABL_25GBASEKRS C73_BASE_PAGE_A(9)
#define C73_BASE_PAGE_TECH_ABL_25GBASEKR C73_BASE_PAGE_A(10)
#define C73_BASE_PAGE_25G_RS_FEC_REQ BIT_ULL(44)
#define C73_BASE_PAGE_25G_BASER_FEC_REQ BIT_ULL(45)
#define C73_BASE_PAGE_10G_BASER_FEC_ABL BIT_ULL(46)
#define C73_BASE_PAGE_10G_BASER_FEC_REQ BIT_ULL(47)
#define C73_NEXT_PAGE_MESSAGE_CODE(x) ((x) & GENMASK(10, 0))
#define C73_NEXT_PAGE_TOGGLE BIT(11)
#define C73_NEXT_PAGE_ACK2 BIT(12)
#define C73_NEXT_PAGE_MP BIT(13)
#define C73_NEXT_PAGE_ACK BIT(14)
#define C73_NEXT_PAGE_NP BIT(15)
#define C73_NEXT_PAGE_U_MSK GENMASK(47, 16)
#define C73_NEXT_PAGE_U_X(x) (((x) & C73_NEXT_PAGE_U_MSK) >> 16)
#define C73_NEXT_PAGE_U(x) (((x) << 16) & C73_NEXT_PAGE_U_MSK)
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);
extern int
linkmode_c73_priority_resolution(const unsigned long *modes,
enum ethtool_link_mode_bit_indices *resolved);
extern void linkmode_support_c73(unsigned long *modes);
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(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(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(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;
}
static inline u64 linkmode_adv_to_c73_base_page(const unsigned long *advertising)
{
u64 result = 0;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_1000BASEKX;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_10GBASEKX4;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_10GBASEKR;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_40GBASEKR4;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_40GBASECR4;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_100GBASEKR4;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_100GBASECR4;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
advertising))
result |= C73_BASE_PAGE_TECH_ABL_25GBASEKR;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
result |= C73_BASE_PAGE_PAUSE;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
result |= C73_BASE_PAGE_ASM_DIR;
return result;
}
static inline void mii_c73_mod_linkmode_lpa_t(unsigned long *advertising,
u64 base_page)
{
linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_1000BASEKX);
linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_10GBASEKX4);
linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_10GBASEKR);
linkmode_mod_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_40GBASEKR4);
linkmode_mod_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_40GBASECR4);
linkmode_mod_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_100GBASEKR4);
linkmode_mod_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_100GBASECR4);
linkmode_mod_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, advertising,
base_page & C73_BASE_PAGE_TECH_ABL_25GBASEKR);
linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
base_page & C73_BASE_PAGE_PAUSE);
linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising,
base_page & C73_BASE_PAGE_ASM_DIR);
}
/**
* 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__ */
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