[PATCH net-next v3 11/47] [RFC] net: phylink: Add support for CRS-based rate adaptation
From: Sean Anderson <hidden>
Date: 2022-07-15 22:02:23
Also in:
linux-arm-kernel, lkml
Subsystem:
ethernet phy library, networking drivers, sff/sfp/sfp+ module support, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Russell King, Linus Torvalds
This adds support for CRS-based rate adaptation, such as the type used for 10PASS-TS and 2BASE-TL. As these link modes are not supported by any in-tree phy, this patch is marked as RFC. It serves chiefly to illustrate the approach to adding support for another rate adaptation type. Signed-off-by: Sean Anderson <redacted> --- Changes in v3: - New drivers/net/phy/phylink.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 7f65413aa778..d27f6d23861c 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c@@ -476,7 +476,15 @@ void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface, break; } case RATE_ADAPT_CRS: - /* TODO */ + /* We can only adapt if the MAC supports half-duplex at the + * interface speed + */ + if (caps & MAC_1000) { + if (mac_capabilities & MAC_1000HD) + caps |= MAC_100 | MAC_10; + } else if (caps & MAC_100 && mac_capabilities & MAC_100HD) { + caps |= MAC_10; + } break; case RATE_ADAPT_OPEN_LOOP: open_loop:
@@ -1448,6 +1456,8 @@ static void phylink_phy_change(struct phy_device *phydev, bool up) if (phydev->rate_adaptation == RATE_ADAPT_PAUSE) { pl->phy_state.duplex = DUPLEX_FULL; rx_pause = true; + } else if (phydev->rate_adaptation == RATE_ADAPT_CRS) { + pl->phy_state.duplex = DUPLEX_HALF; } pl->phy_state.pause = MLO_PAUSE_NONE; if (tx_pause)
--
2.35.1.1320.gc452695387.dirty