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157 lines
4.2 KiB
Diff
157 lines
4.2 KiB
Diff
From 0a0c4b3dd4f34df4532f254a5940b520015d766f Mon Sep 17 00:00:00 2001
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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 719/744] 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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---
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drivers/net/phy/phylink.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++
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include/linux/phylink.h | 6 ++++
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2 files changed, 88 insertions(+)
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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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@@ -341,12 +347,20 @@ struct phylink *phylink_create(struct ne
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return ERR_PTR(ret);
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}
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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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@@ -813,4 +827,72 @@ 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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+void phylink_set_link_port(struct phylink *pl, u32 support, u8 port)
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+{
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+ WARN_ON(support & ~SUPPORTED_INTERFACES);
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+
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+ mutex_lock(&pl->config_mutex);
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+ pl->link_port_support = support;
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+ pl->link_port = port;
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+ mutex_unlock(&pl->config_mutex);
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+}
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+EXPORT_SYMBOL_GPL(phylink_set_link_port);
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+
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+int phylink_set_link_an_mode(struct phylink *pl, unsigned int mode)
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+{
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+ int ret = 0;
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+
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+ mutex_lock(&pl->config_mutex);
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+ if (pl->link_an_mode != mode) {
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+ ret = phylink_get_support(pl, mode);
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+ if (ret == 0) {
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+ if (!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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+ 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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+ 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_an_mode);
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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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@@ -67,4 +67,10 @@ int phylink_ethtool_get_settings(struct
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int phylink_ethtool_set_settings(struct phylink *, struct ethtool_cmd *);
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int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
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+void phylink_set_link_port(struct phylink *pl, u32 support, u8 port);
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+int phylink_set_link_an_mode(struct phylink *pl, unsigned int mode);
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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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#endif
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