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net: phylink: add function to resolve clause 73 negotiation
Add a function to resolve clause 73 negotiation according to the priority resolution function described in clause 73.3.6. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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2 changed files with 41 additions and 0 deletions
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@ -3212,6 +3212,45 @@ static const struct sfp_upstream_ops sfp_phylink_ops = {
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/* Helpers for MAC drivers */
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static struct {
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int bit;
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int speed;
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} phylink_c73_priority_resolution[] = {
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{ ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 },
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{ ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 },
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/* 100GBASE-KP4 and 100GBASE-CR10 not supported */
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{ ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 },
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{ ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 },
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{ ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 },
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{ ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 },
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/* 5GBASE-KR not supported */
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{ ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 },
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{ ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 },
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};
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void phylink_resolve_c73(struct phylink_link_state *state)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) {
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int bit = phylink_c73_priority_resolution[i].bit;
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if (linkmode_test_bit(bit, state->advertising) &&
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linkmode_test_bit(bit, state->lp_advertising))
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break;
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}
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if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) {
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state->speed = phylink_c73_priority_resolution[i].speed;
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state->duplex = DUPLEX_FULL;
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} else {
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/* negotiation failure */
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state->link = false;
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}
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phylink_resolve_an_pause(state);
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}
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EXPORT_SYMBOL_GPL(phylink_resolve_c73);
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static void phylink_decode_c37_word(struct phylink_link_state *state,
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uint16_t config_reg, int speed)
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{
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@ -656,6 +656,8 @@ int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
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const unsigned long *advertising);
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void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
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void phylink_resolve_c73(struct phylink_link_state *state);
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void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
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struct phylink_link_state *state);
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