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QCA808x does not currently fill in the possible_interfaces. This leads to Phylink not being aware that it supports 2500Base-X as well so in cases where it is connected to a DSA switch like MV88E6393 it will limit that port to phy-mode set in the DTS. That means that if SGMII is used you are limited to 1G only while if 2500Base-X was set you are limited to 2.5G only. Populating the possible_interfaces fixes this, so lets backport the patches from kernel 6.9. This also includes a backport of the Phylink PHY validation series from kernel 6.8 that allows the use of possible_interfaces. Link: https://github.com/openwrt/openwrt/pull/15765 Signed-off-by: Robert Marko <robimarko@gmail.com>
131 lines
4.6 KiB
Diff
131 lines
4.6 KiB
Diff
From 8f7a9799c5949f94ecc3acfd71b36437a7ade73b Mon Sep 17 00:00:00 2001
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From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
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Date: Fri, 24 Nov 2023 12:28:39 +0000
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Subject: [PATCH 7/7] net: phylink: use the PHY's possible_interfaces if
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populated
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Some PHYs such as Aquantia, Broadcom 84881, and Marvell 88X33x0 can
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switch between a set of interface types depending on the negotiated
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media speed, or can use rate adaption for some or all of these
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interface types.
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We currently assume that these are Clause 45 PHYs that are configured
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not to use a specific set of interface modes, which has worked so far,
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but is just a work-around. In this workaround, we validate using all
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interfaces that the MAC supports, which can lead to extra modes being
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advertised that can not be supported.
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To properly address this, switch to using the newly introduced PHY
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possible_interfaces bitmap which indicates which interface modes will
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be used by the PHY as configured. We calculate the union of the PHY's
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possible interfaces and MACs supported interfaces, checking that is
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non-empty. If the PHY is on a SFP, we further reduce the set by those
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which can be used on a SFP module, again checking that is non-empty.
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Finally, we validate the subset of interfaces, taking account of
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whether rate matching will be used for each individual interface mode.
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This becomes independent of whether the PHY is clause 22 or clause 45.
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It is encouraged that all PHYs that switch interface modes or use
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rate matching should populate phydev->possible_interfaces.
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Tested-by: Luo Jie <quic_luoj@quicinc.com>
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Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Link: https://lore.kernel.org/r/E1r6VIV-00DDMF-Pi@rmk-PC.armlinux.org.uk
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/phy/phylink.c | 67 +++++++++++++++++++++++++++++++--------
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1 file changed, 54 insertions(+), 13 deletions(-)
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--- a/drivers/net/phy/phylink.c
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+++ b/drivers/net/phy/phylink.c
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@@ -121,6 +121,19 @@ do { \
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})
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#endif
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+static const phy_interface_t phylink_sfp_interface_preference[] = {
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+ PHY_INTERFACE_MODE_25GBASER,
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+ PHY_INTERFACE_MODE_USXGMII,
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+ PHY_INTERFACE_MODE_10GBASER,
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+ PHY_INTERFACE_MODE_5GBASER,
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+ PHY_INTERFACE_MODE_2500BASEX,
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+ PHY_INTERFACE_MODE_SGMII,
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+ PHY_INTERFACE_MODE_1000BASEX,
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+ PHY_INTERFACE_MODE_100BASEX,
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+};
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+
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+static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces);
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+
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/**
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* phylink_set_port_modes() - set the port type modes in the ethtool mask
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* @mask: ethtool link mode mask
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@@ -1742,6 +1755,47 @@ static int phylink_validate_phy(struct p
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unsigned long *supported,
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struct phylink_link_state *state)
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{
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+ DECLARE_PHY_INTERFACE_MASK(interfaces);
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+
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+ /* If the PHY provides a bitmap of the interfaces it will be using
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+ * depending on the negotiated media speeds, use this to validate
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+ * which ethtool link modes can be used.
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+ */
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+ if (!phy_interface_empty(phy->possible_interfaces)) {
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+ /* We only care about the union of the PHY's interfaces and
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+ * those which the host supports.
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+ */
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+ phy_interface_and(interfaces, phy->possible_interfaces,
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+ pl->config->supported_interfaces);
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+
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+ if (phy_interface_empty(interfaces)) {
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+ phylink_err(pl, "PHY has no common interfaces\n");
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+ return -EINVAL;
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+ }
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+
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+ if (phy_on_sfp(phy)) {
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+ /* If the PHY is on a SFP, limit the interfaces to
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+ * those that can be used with a SFP module.
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+ */
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+ phy_interface_and(interfaces, interfaces,
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+ phylink_sfp_interfaces);
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+
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+ if (phy_interface_empty(interfaces)) {
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+ phylink_err(pl, "SFP PHY's possible interfaces becomes empty\n");
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+ return -EINVAL;
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+ }
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+ }
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+
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+ phylink_dbg(pl, "PHY %s uses interfaces %*pbl, validating %*pbl\n",
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+ phydev_name(phy),
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+ (int)PHY_INTERFACE_MODE_MAX,
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+ phy->possible_interfaces,
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+ (int)PHY_INTERFACE_MODE_MAX, interfaces);
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+
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+ return phylink_validate_mask(pl, phy, supported, state,
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+ interfaces);
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+ }
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+
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/* Check whether we would use rate matching for the proposed interface
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* mode.
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*/
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@@ -2985,19 +3039,6 @@ static void phylink_sfp_detach(void *ups
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pl->netdev->sfp_bus = NULL;
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}
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-static const phy_interface_t phylink_sfp_interface_preference[] = {
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- PHY_INTERFACE_MODE_25GBASER,
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- PHY_INTERFACE_MODE_USXGMII,
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- PHY_INTERFACE_MODE_10GBASER,
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- PHY_INTERFACE_MODE_5GBASER,
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- PHY_INTERFACE_MODE_2500BASEX,
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- PHY_INTERFACE_MODE_SGMII,
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- PHY_INTERFACE_MODE_1000BASEX,
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- PHY_INTERFACE_MODE_100BASEX,
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-};
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-
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-static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces);
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-
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static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl,
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const unsigned long *intf)
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{
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