diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/775-v5.16-3-net-phylink-use-supported_interfaces-for-phylink-val.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/775-v5.16-3-net-phylink-use-supported_interfaces-for-phylink-val.patch | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/775-v5.16-3-net-phylink-use-supported_interfaces-for-phylink-val.patch b/pkgs/patches-linux-5.15/775-v5.16-3-net-phylink-use-supported_interfaces-for-phylink-val.patch new file mode 100644 index 0000000..fad5044 --- /dev/null +++ b/pkgs/patches-linux-5.15/775-v5.16-3-net-phylink-use-supported_interfaces-for-phylink-val.patch @@ -0,0 +1,105 @@ +From d25f3a74f30aace819163dfa54f2a4b8ca1dc932 Mon Sep 17 00:00:00 2001 +From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk> +Date: Tue, 26 Oct 2021 11:06:11 +0100 +Subject: [PATCH 3/3] net: phylink: use supported_interfaces for phylink + validation + +If the network device supplies a supported interface bitmap, we can use +that during phylink's validation to simplify MAC drivers in two ways by +using the supported_interfaces bitmap to: + +1. reject unsupported interfaces before calling into the MAC driver. +2. generate the set of all supported link modes across all supported + interfaces (used mainly for SFP, but also some 10G PHYs.) + +Suggested-by: Sean Anderson <sean.anderson@seco.com> +Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/phy/phylink.c | 36 ++++++++++++++++++++++++++++++++++++ + include/linux/phylink.h | 12 ++++++++++-- + 2 files changed, 46 insertions(+), 2 deletions(-) + +diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c +index 14c7d73790b4..6da245dacca4 100644 +--- a/drivers/net/phy/phylink.c ++++ b/drivers/net/phy/phylink.c +@@ -155,9 +155,45 @@ static const char *phylink_an_mode_str(unsigned int mode) + return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; + } + ++static int phylink_validate_any(struct phylink *pl, unsigned long *supported, ++ struct phylink_link_state *state) ++{ ++ __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; ++ __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; ++ __ETHTOOL_DECLARE_LINK_MODE_MASK(s); ++ struct phylink_link_state t; ++ int intf; ++ ++ for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { ++ if (test_bit(intf, pl->config->supported_interfaces)) { ++ linkmode_copy(s, supported); ++ ++ t = *state; ++ t.interface = intf; ++ pl->mac_ops->validate(pl->config, s, &t); ++ linkmode_or(all_s, all_s, s); ++ linkmode_or(all_adv, all_adv, t.advertising); ++ } ++ } ++ ++ linkmode_copy(supported, all_s); ++ linkmode_copy(state->advertising, all_adv); ++ ++ return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; ++} ++ + static int phylink_validate(struct phylink *pl, unsigned long *supported, + struct phylink_link_state *state) + { ++ if (!phy_interface_empty(pl->config->supported_interfaces)) { ++ if (state->interface == PHY_INTERFACE_MODE_NA) ++ return phylink_validate_any(pl, supported, state); ++ ++ if (!test_bit(state->interface, ++ pl->config->supported_interfaces)) ++ return -EINVAL; ++ } ++ + pl->mac_ops->validate(pl->config, supported, state); + + return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; +diff --git a/include/linux/phylink.h b/include/linux/phylink.h +index bc4b866cd99b..f037470b6fb3 100644 +--- a/include/linux/phylink.h ++++ b/include/linux/phylink.h +@@ -67,6 +67,8 @@ enum phylink_op_type { + * @ovr_an_inband: if true, override PCS to MLO_AN_INBAND + * @get_fixed_state: callback to execute to determine the fixed link state, + * if MAC link is at %MLO_AN_FIXED mode. ++ * @supported_interfaces: bitmap describing which PHY_INTERFACE_MODE_xxx ++ * are supported by the MAC/PCS. + */ + struct phylink_config { + struct device *dev; +@@ -134,8 +136,14 @@ struct phylink_mac_ops { + * based on @state->advertising and/or @state->speed and update + * @state->interface accordingly. See phylink_helper_basex_speed(). + * +- * When @state->interface is %PHY_INTERFACE_MODE_NA, phylink expects the +- * MAC driver to return all supported link modes. ++ * When @config->supported_interfaces has been set, phylink will iterate ++ * over the supported interfaces to determine the full capability of the ++ * MAC. The validation function must not print errors if @state->interface ++ * is set to an unexpected value. ++ * ++ * When @config->supported_interfaces is empty, phylink will call this ++ * function with @state->interface set to %PHY_INTERFACE_MODE_NA, and ++ * expects the MAC driver to return all supported link modes. + * + * If the @state->interface mode is not supported, then the @supported + * mask must be cleared. +-- +2.35.1 + |