| From | Sean Anderson <> | Subject | [PATCH net-next v3 11/47] [RFC] net: phylink: Add support for CRS-based rate adaptation | Date | Fri, 15 Jul 2022 17:59:18 -0400 |
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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 <sean.anderson@seco.com> ---
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
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