net: phylink: add pcs_inband_caps() method

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Add a pcs_inband_caps() method to query the PCS for its inband link
capabilities, and use this to determine whether link modes used with
optical SFPs can be supported.

When a PCS does not provide a method, we allow inband negotiation to
be either on or off, making this a no-op until the pcs_inband_caps()
method is implemented by a PCS driver.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tIUs4-006IUU-7K@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Russell King (Oracle) 2024-12-03 15:31:28 +00:00 • committed by Jakub Kicinski

parent a219912e0f

commit df874f9e52

2 changed files with 77 additions and 0 deletions

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60

drivers/net/phy/phylink.c

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17

include/linux/phylink.h

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