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- From aa8b6bd2b1f235b262bd27f317a0516f196c2c6a Mon Sep 17 00:00:00 2001
- From: "Russell King (Oracle)" <[email protected]>
- Date: Tue, 23 May 2023 11:15:58 +0100
- Subject: [PATCH 18/21] 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) <[email protected]>
- Reviewed-by: Andrew Lunn <[email protected]>
- Signed-off-by: Jakub Kicinski <[email protected]>
- ---
- drivers/net/phy/phylink.c | 39 +++++++++++++++++++++++++++++++++++++++
- include/linux/phylink.h | 2 ++
- 2 files changed, 41 insertions(+)
- --- a/drivers/net/phy/phylink.c
- +++ b/drivers/net/phy/phylink.c
- @@ -3212,6 +3212,45 @@ static const struct sfp_upstream_ops sfp
-
- /* Helpers for MAC drivers */
-
- +static struct {
- + int bit;
- + int speed;
- +} phylink_c73_priority_resolution[] = {
- + { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 },
- + { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 },
- + /* 100GBASE-KP4 and 100GBASE-CR10 not supported */
- + { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 },
- + { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 },
- + { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 },
- + { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 },
- + /* 5GBASE-KR not supported */
- + { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 },
- + { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 },
- +};
- +
- +void phylink_resolve_c73(struct phylink_link_state *state)
- +{
- + int i;
- +
- + for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) {
- + int bit = phylink_c73_priority_resolution[i].bit;
- + if (linkmode_test_bit(bit, state->advertising) &&
- + linkmode_test_bit(bit, state->lp_advertising))
- + break;
- + }
- +
- + if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) {
- + state->speed = phylink_c73_priority_resolution[i].speed;
- + state->duplex = DUPLEX_FULL;
- + } else {
- + /* negotiation failure */
- + state->link = false;
- + }
- +
- + phylink_resolve_an_pause(state);
- +}
- +EXPORT_SYMBOL_GPL(phylink_resolve_c73);
- +
- static void phylink_decode_c37_word(struct phylink_link_state *state,
- uint16_t config_reg, int speed)
- {
- --- a/include/linux/phylink.h
- +++ b/include/linux/phylink.h
- @@ -656,6 +656,8 @@ int phylink_mii_c22_pcs_config(struct md
- const unsigned long *advertising);
- void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
-
- +void phylink_resolve_c73(struct phylink_link_state *state);
- +
- void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
- struct phylink_link_state *state);
-
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