diff options
author | David S. Miller <davem@davemloft.net> | 2021-04-14 12:56:44 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-04-14 12:56:44 -0700 |
commit | 945c6ff851d8cc41571a8bb5735fb40a925a7aa2 (patch) | |
tree | be28579efa57ff394abed7b253f319f30dacc940 | |
parent | 87b7e5c05c98c5f3947345d7fba68472e43cf611 (diff) | |
parent | d7029f55cc46066d833cbf7f532b1ae8d6835859 (diff) | |
download | linux-945c6ff851d8cc41571a8bb5735fb40a925a7aa2.tar.bz2 |
Merge branch 'marvell-88x2222-improvements'
Ivan Bornyakov says:
====================
net: phy: marvell-88x2222: a couple of improvements
First, there are some SFP modules that only uses RX_LOS for link
indication. Add check that link is operational before actual read of
line-side status.
Second, it is invalid to set 10G speed without autonegotiation,
according to phy_ethtool_ksettings_set(). Implement switching between
10GBase-R and 1000Base-X/SGMII if autonegotiation can't complete but
there is signal in line.
Changelog:
v1 -> v2:
* make checking that link is operational more friendly for
trancievers without SFP cages.
* split swapping 1G/10G modes into non-functional and functional
commits for the sake of easier review.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/phy/marvell-88x2222.c | 314 |
1 files changed, 209 insertions, 105 deletions
diff --git a/drivers/net/phy/marvell-88x2222.c b/drivers/net/phy/marvell-88x2222.c index eca8c2f20684..9b9ac3ef735d 100644 --- a/drivers/net/phy/marvell-88x2222.c +++ b/drivers/net/phy/marvell-88x2222.c @@ -32,6 +32,10 @@ #define MV_HOST_RST_SW BIT(7) #define MV_PORT_RST_SW (MV_LINE_RST_SW | MV_HOST_RST_SW) +/* PMD Receive Signal Detect */ +#define MV_RX_SIGNAL_DETECT 0x000A +#define MV_RX_SIGNAL_DETECT_GLOBAL BIT(0) + /* 1000Base-X/SGMII Control Register */ #define MV_1GBX_CTRL (0x2000 + MII_BMCR) @@ -48,9 +52,12 @@ #define MV_1GBX_PHY_STAT_SPEED100 BIT(14) #define MV_1GBX_PHY_STAT_SPEED1000 BIT(15) +#define AUTONEG_TIMEOUT 3 + struct mv2222_data { phy_interface_t line_interface; __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); + bool sfp_link; }; /* SFI PMA transmit enable */ @@ -81,86 +88,6 @@ static int mv2222_soft_reset(struct phy_device *phydev) 5000, 1000000, true); } -/* Returns negative on error, 0 if link is down, 1 if link is up */ -static int mv2222_read_status_10g(struct phy_device *phydev) -{ - int val, link = 0; - - val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1); - if (val < 0) - return val; - - if (val & MDIO_STAT1_LSTATUS) { - link = 1; - - /* 10GBASE-R do not support auto-negotiation */ - phydev->autoneg = AUTONEG_DISABLE; - phydev->speed = SPEED_10000; - phydev->duplex = DUPLEX_FULL; - } - - return link; -} - -/* Returns negative on error, 0 if link is down, 1 if link is up */ -static int mv2222_read_status_1g(struct phy_device *phydev) -{ - int val, link = 0; - - val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT); - if (val < 0) - return val; - - if (!(val & BMSR_LSTATUS) || - (phydev->autoneg == AUTONEG_ENABLE && - !(val & BMSR_ANEGCOMPLETE))) - return 0; - - link = 1; - - val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_PHY_STAT); - if (val < 0) - return val; - - if (val & MV_1GBX_PHY_STAT_AN_RESOLVED) { - if (val & MV_1GBX_PHY_STAT_DUPLEX) - phydev->duplex = DUPLEX_FULL; - else - phydev->duplex = DUPLEX_HALF; - - if (val & MV_1GBX_PHY_STAT_SPEED1000) - phydev->speed = SPEED_1000; - else if (val & MV_1GBX_PHY_STAT_SPEED100) - phydev->speed = SPEED_100; - else - phydev->speed = SPEED_10; - } - - return link; -} - -static int mv2222_read_status(struct phy_device *phydev) -{ - struct mv2222_data *priv = phydev->priv; - int link; - - phydev->link = 0; - phydev->speed = SPEED_UNKNOWN; - phydev->duplex = DUPLEX_UNKNOWN; - - if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) - link = mv2222_read_status_10g(phydev); - else - link = mv2222_read_status_1g(phydev); - - if (link < 0) - return link; - - phydev->link = link; - - return 0; -} - static int mv2222_disable_aneg(struct phy_device *phydev) { int ret = phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL, @@ -248,6 +175,24 @@ static bool mv2222_is_1gbx_capable(struct phy_device *phydev) priv->supported); } +static bool mv2222_is_sgmii_capable(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + + return (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, + priv->supported) || + linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, + priv->supported)); +} + static int mv2222_config_line(struct phy_device *phydev) { struct mv2222_data *priv = phydev->priv; @@ -267,7 +212,8 @@ static int mv2222_config_line(struct phy_device *phydev) } } -static int mv2222_setup_forced(struct phy_device *phydev) +/* Switch between 1G (1000Base-X/SGMII) and 10G (10GBase-R) modes */ +static int mv2222_swap_line_type(struct phy_device *phydev) { struct mv2222_data *priv = phydev->priv; bool changed = false; @@ -275,25 +221,23 @@ static int mv2222_setup_forced(struct phy_device *phydev) switch (priv->line_interface) { case PHY_INTERFACE_MODE_10GBASER: - if (phydev->speed == SPEED_1000 && - mv2222_is_1gbx_capable(phydev)) { + if (mv2222_is_1gbx_capable(phydev)) { priv->line_interface = PHY_INTERFACE_MODE_1000BASEX; changed = true; } - break; - case PHY_INTERFACE_MODE_1000BASEX: - if (phydev->speed == SPEED_10000 && - mv2222_is_10g_capable(phydev)) { - priv->line_interface = PHY_INTERFACE_MODE_10GBASER; + if (mv2222_is_sgmii_capable(phydev)) { + priv->line_interface = PHY_INTERFACE_MODE_SGMII; changed = true; } break; + case PHY_INTERFACE_MODE_1000BASEX: case PHY_INTERFACE_MODE_SGMII: - ret = mv2222_set_sgmii_speed(phydev); - if (ret < 0) - return ret; + if (mv2222_is_10g_capable(phydev)) { + priv->line_interface = PHY_INTERFACE_MODE_10GBASER; + changed = true; + } break; default: @@ -306,6 +250,29 @@ static int mv2222_setup_forced(struct phy_device *phydev) return ret; } + return 0; +} + +static int mv2222_setup_forced(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int ret; + + if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) { + if (phydev->speed < SPEED_10000 && + phydev->speed != SPEED_UNKNOWN) { + ret = mv2222_swap_line_type(phydev); + if (ret < 0) + return ret; + } + } + + if (priv->line_interface == PHY_INTERFACE_MODE_SGMII) { + ret = mv2222_set_sgmii_speed(phydev); + if (ret < 0) + return ret; + } + return mv2222_disable_aneg(phydev); } @@ -319,17 +286,9 @@ static int mv2222_config_aneg(struct phy_device *phydev) return 0; if (phydev->autoneg == AUTONEG_DISABLE || - phydev->speed == SPEED_10000) + priv->line_interface == PHY_INTERFACE_MODE_10GBASER) return mv2222_setup_forced(phydev); - if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER && - mv2222_is_1gbx_capable(phydev)) { - priv->line_interface = PHY_INTERFACE_MODE_1000BASEX; - ret = mv2222_config_line(phydev); - if (ret < 0) - return ret; - } - adv = linkmode_adv_to_mii_adv_x(priv->supported, ETHTOOL_LINK_MODE_1000baseX_Full_BIT); @@ -363,6 +322,135 @@ static int mv2222_aneg_done(struct phy_device *phydev) return (ret & BMSR_ANEGCOMPLETE); } +/* Returns negative on error, 0 if link is down, 1 if link is up */ +static int mv2222_read_status_10g(struct phy_device *phydev) +{ + static int timeout; + int val, link = 0; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1); + if (val < 0) + return val; + + if (val & MDIO_STAT1_LSTATUS) { + link = 1; + + /* 10GBASE-R do not support auto-negotiation */ + phydev->autoneg = AUTONEG_DISABLE; + phydev->speed = SPEED_10000; + phydev->duplex = DUPLEX_FULL; + } else { + if (phydev->autoneg == AUTONEG_ENABLE) { + timeout++; + + if (timeout > AUTONEG_TIMEOUT) { + timeout = 0; + + val = mv2222_swap_line_type(phydev); + if (val < 0) + return val; + + return mv2222_config_aneg(phydev); + } + } + } + + return link; +} + +/* Returns negative on error, 0 if link is down, 1 if link is up */ +static int mv2222_read_status_1g(struct phy_device *phydev) +{ + static int timeout; + int val, link = 0; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT); + if (val < 0) + return val; + + if (phydev->autoneg == AUTONEG_ENABLE && + !(val & BMSR_ANEGCOMPLETE)) { + timeout++; + + if (timeout > AUTONEG_TIMEOUT) { + timeout = 0; + + val = mv2222_swap_line_type(phydev); + if (val < 0) + return val; + + return mv2222_config_aneg(phydev); + } + + return 0; + } + + if (!(val & BMSR_LSTATUS)) + return 0; + + link = 1; + + val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_PHY_STAT); + if (val < 0) + return val; + + if (val & MV_1GBX_PHY_STAT_AN_RESOLVED) { + if (val & MV_1GBX_PHY_STAT_DUPLEX) + phydev->duplex = DUPLEX_FULL; + else + phydev->duplex = DUPLEX_HALF; + + if (val & MV_1GBX_PHY_STAT_SPEED1000) + phydev->speed = SPEED_1000; + else if (val & MV_1GBX_PHY_STAT_SPEED100) + phydev->speed = SPEED_100; + else + phydev->speed = SPEED_10; + } + + return link; +} + +static bool mv2222_link_is_operational(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int val; + + val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_RX_SIGNAL_DETECT); + if (val < 0 || !(val & MV_RX_SIGNAL_DETECT_GLOBAL)) + return false; + + if (phydev->sfp_bus && !priv->sfp_link) + return false; + + return true; +} + +static int mv2222_read_status(struct phy_device *phydev) +{ + struct mv2222_data *priv = phydev->priv; + int link; + + phydev->link = 0; + phydev->speed = SPEED_UNKNOWN; + phydev->duplex = DUPLEX_UNKNOWN; + + if (!mv2222_link_is_operational(phydev)) + return 0; + + if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) + link = mv2222_read_status_10g(phydev); + else + link = mv2222_read_status_1g(phydev); + + if (link < 0) + return link; + + phydev->link = link; + + return 0; +} + static int mv2222_resume(struct phy_device *phydev) { return mv2222_tx_enable(phydev); @@ -424,11 +512,7 @@ static int mv2222_sfp_insert(void *upstream, const struct sfp_eeprom_id *id) return ret; if (mutex_trylock(&phydev->lock)) { - if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER) - ret = mv2222_setup_forced(phydev); - else - ret = mv2222_config_aneg(phydev); - + ret = mv2222_config_aneg(phydev); mutex_unlock(&phydev->lock); } @@ -446,9 +530,29 @@ static void mv2222_sfp_remove(void *upstream) linkmode_zero(priv->supported); } +static void mv2222_sfp_link_up(void *upstream) +{ + struct phy_device *phydev = upstream; + struct mv2222_data *priv; + + priv = phydev->priv; + priv->sfp_link = true; +} + +static void mv2222_sfp_link_down(void *upstream) +{ + struct phy_device *phydev = upstream; + struct mv2222_data *priv; + + priv = phydev->priv; + priv->sfp_link = false; +} + static const struct sfp_upstream_ops sfp_phy_ops = { .module_insert = mv2222_sfp_insert, .module_remove = mv2222_sfp_remove, + .link_up = mv2222_sfp_link_up, + .link_down = mv2222_sfp_link_down, .attach = phy_sfp_attach, .detach = phy_sfp_detach, }; |