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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-06-11 23:05:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-11 23:43:56 +0300 |
| commit | a853c68e29bb974ca0cc0a8eaf88c333217556aa (patch) | |
| tree | 2d464b8d4156ca7df078c77b45a5ad359e40d372 /include/linux/pcs | |
| parent | f7380bba42fd0654bf8195fb741d5f92b0f46df9 (diff) | |
| download | linux-a853c68e29bb974ca0cc0a8eaf88c333217556aa.tar.xz | |
net: pcs: xpcs: export xpcs_do_config and xpcs_link_up
The sja1105 hardware has a quirk in that some changes require a switch
reset, which loses all configuration. When the reset is initiated,
everything needs to be reprogrammed, including the MACs and the PCS.
This is currently done in sja1105_static_config_reload() - we manually
call sja1105_adjust_port_config(), sja1105_sgmii_pcs_config() and
sja1105_sgmii_pcs_force_speed() which are all internal functions.
There is a desire for sja1105 to use the common xpcs driver, and that
means that the equivalents of those functions, xpcs_do_config() and
xpcs_link_up() respectively, will no longer be local functions.
Forcing phylink to retrigger a resolve somehow, say by doing dev_close()
followed by dev_open() is not really an option, because the CPU port
might have a PCS as well, and there is no net device which we can close
and reopen for that. Additionally, the dev_close/dev_open sequence might
force a renegotiation of the copper-side link for SGMII ports connected
to a PHY, and this is undesirable as well, because the switch reset is
much quicker than a PHY autoneg, so we would have a lot more downtime.
The only solution I see is for the sja1105 driver to keep doing what
it's doing, and that means we need to export the equivalents from xpcs
for sja1105_sgmii_pcs_config and sja1105_sgmii_pcs_force_speed, and call
them directly in sja1105_static_config_reload(). This will be done
during the conversion patch.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/pcs')
| -rw-r--r-- | include/linux/pcs/pcs-xpcs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h index dae7dd8ac683..add077a81b21 100644 --- a/include/linux/pcs/pcs-xpcs.h +++ b/include/linux/pcs/pcs-xpcs.h @@ -27,6 +27,10 @@ struct dw_xpcs { }; int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface); +void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode, + phy_interface_t interface, int speed, int duplex); +int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, + unsigned int mode); void xpcs_validate(struct dw_xpcs *xpcs, unsigned long *supported, struct phylink_link_state *state); int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, |