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177 lines
4.6 KiB
177 lines
4.6 KiB
From: Russell King <rmk+kernel@arm.linux.org.uk>
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Date: Thu, 24 Sep 2015 11:01:13 +0100
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Subject: [PATCH] phylink: add hooks for SFP support
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Add support to phylink for SFP, which needs to control and configure
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the ethernet MAC link state. Specifically, SFP needs to:
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1. set the negotiation mode between SGMII and 1000base-X
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2. attach and detach the module PHY
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3. prevent the link coming up when errors are reported
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In the absence of a PHY, we also need to set the ethtool port type
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according to the module plugged in.
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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- rework phylink_set_link_*(), combining into a single function.
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---
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--- a/drivers/net/phy/phylink.c
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+++ b/drivers/net/phy/phylink.c
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@@ -11,6 +11,7 @@
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#include <linux/ethtool.h>
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#include <linux/export.h>
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#include <linux/gpio/consumer.h>
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+#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/of.h>
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#include <linux/of_mdio.h>
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@@ -29,11 +30,16 @@
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(ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
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ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
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+static LIST_HEAD(phylinks);
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+static DEFINE_MUTEX(phylink_mutex);
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+
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enum {
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PHYLINK_DISABLE_STOPPED,
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+ PHYLINK_DISABLE_LINK,
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};
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struct phylink {
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+ struct list_head node;
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struct net_device *netdev;
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const struct phylink_mac_ops *ops;
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struct mutex config_mutex;
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@@ -375,12 +381,20 @@ struct phylink *phylink_create(struct ne
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phylink_init_advert(pl, pl->link_an_mode, pl->supported,
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pl->link_config.advertising);
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+ mutex_lock(&phylink_mutex);
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+ list_add_tail(&pl->node, &phylinks);
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+ mutex_unlock(&phylink_mutex);
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+
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return pl;
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}
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EXPORT_SYMBOL_GPL(phylink_create);
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void phylink_destroy(struct phylink *pl)
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{
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+ mutex_lock(&phylink_mutex);
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+ list_del(&pl->node);
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+ mutex_unlock(&phylink_mutex);
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+
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cancel_work_sync(&pl->resolve);
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kfree(pl);
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}
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@@ -900,4 +914,93 @@ int phylink_mii_ioctl(struct phylink *pl
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}
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EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
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+
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+
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+void phylink_disable(struct phylink *pl)
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+{
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+ set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
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+ flush_work(&pl->resolve);
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+
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+ netif_carrier_off(pl->netdev);
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+}
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+EXPORT_SYMBOL_GPL(phylink_disable);
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+
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+void phylink_enable(struct phylink *pl)
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+{
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+ clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
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+ phylink_run_resolve(pl);
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+}
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+EXPORT_SYMBOL_GPL(phylink_enable);
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+
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+int phylink_set_link(struct phylink *pl, unsigned int mode, u8 port,
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+ const unsigned long *support)
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+{
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+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
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+ int ret = 0;
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+
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+ netdev_dbg(pl->netdev, "requesting link mode %s with support %*pb\n",
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+ phylink_an_mode_str(mode),
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+ __ETHTOOL_LINK_MODE_MASK_NBITS, support);
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+
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+ if (mode == MLO_AN_FIXED)
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+ return -EINVAL;
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+
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+ linkmode_copy(mask, support);
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+
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+ /* Ignore errors if we're expecting a PHY to attach later */
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+ ret = phylink_validate_support(pl, mode, mask);
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+ if (ret && mode != MLO_AN_PHY)
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+ return ret;
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+
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+ mutex_lock(&pl->config_mutex);
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+ if (mode == MLO_AN_8023Z && pl->phydev) {
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+ ret = -EINVAL;
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+ } else {
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+ bool changed = !bitmap_equal(pl->supported, mask,
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+ __ETHTOOL_LINK_MODE_MASK_NBITS);
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+ if (changed) {
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+ linkmode_copy(pl->supported, mask);
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+
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+ phylink_init_advert(pl, mode, mask,
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+ pl->link_config.advertising);
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+ }
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+
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+ if (pl->link_an_mode != mode) {
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+ pl->link_an_mode = mode;
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+
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+ changed = true;
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+
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+ netdev_info(pl->netdev, "switched to %s link mode\n",
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+ phylink_an_mode_str(mode));
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+ }
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+
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+ pl->link_port = port;
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+
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+ if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
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+ &pl->phylink_disable_state))
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+ phylink_mac_config(pl, &pl->link_config);
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+ }
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+ mutex_unlock(&pl->config_mutex);
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+
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+ return ret;
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+}
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+EXPORT_SYMBOL_GPL(phylink_set_link);
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+
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+struct phylink *phylink_lookup_by_netdev(struct net_device *ndev)
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+{
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+ struct phylink *pl, *found = NULL;
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+
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+ mutex_lock(&phylink_mutex);
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+ list_for_each_entry(pl, &phylinks, node)
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+ if (pl->netdev == ndev) {
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+ found = pl;
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+ break;
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+ }
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+
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+ mutex_unlock(&phylink_mutex);
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+
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+ return found;
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+}
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+EXPORT_SYMBOL_GPL(phylink_lookup_by_netdev);
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+
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MODULE_LICENSE("GPL");
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--- a/include/linux/phylink.h
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+++ b/include/linux/phylink.h
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@@ -88,6 +88,12 @@ int phylink_ethtool_ksettings_set(struct
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const struct ethtool_link_ksettings *);
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int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
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+int phylink_set_link(struct phylink *pl, unsigned int mode, u8 port,
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+ const unsigned long *support);
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+void phylink_disable(struct phylink *pl);
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+void phylink_enable(struct phylink *pl);
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+struct phylink *phylink_lookup_by_netdev(struct net_device *ndev);
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+
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#define phylink_zero(bm) \
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bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
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#define __phylink_do_bit(op, bm, mode) \
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