net: add helpers to resolve negotiated flow control

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Add a couple of helpers to resolve negotiated flow control. Two helpers
are provided:

- linkmode_resolve_pause() which takes the link partner and local
  advertisements, and decodes whether we should enable TX or RX pause
  at the MAC. This is useful outside of phylib, e.g. in phylink.
- phy_get_pause(), which returns the TX/RX enablement status for the
  current negotiation results of the PHY.

This allows us to centralise the flow control resolution, rather than
spreading it around.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Russell King 2020-02-15 15:49:27 +00:00 • committed by David S. Miller

parent 8062e2333f

commit a87ae8a963

5 changed files with 79 additions and 1 deletions

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4

include/linux/linkmode.h

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3

include/linux/phy.h

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