From 0078930e0c374d327cd3281e5e2f7ff97b40b335 Mon Sep 17 00:00:00 2001
From: Chukun Pan <amadeus@jmu.edu.cn>
Date: Sun, 4 Aug 2024 16:15:12 +0800
Subject: [PATCH] r8168: print link speed and duplex mode
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Like other Ethernet drivers, print link speed and duplex mode
when the interface is up. Formatting output at the same time.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 src/r8168.h   |  2 ++
 src/r8168_n.c | 44 +++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 43 insertions(+), 3 deletions(-)

--- a/src/r8168.h
+++ b/src/r8168.h
@@ -1468,6 +1468,8 @@ enum RTL8168_register_content {
         LinkStatus = 0x02,
         FullDup = 0x01,
 
+#define RTL8168_FULL_DUPLEX_MASK (_1000bpsF | FullDup)
+
         /* DBG_reg */
         Fix_Nak_1 = (1 << 4),
         Fix_Nak_2 = (1 << 3),
--- a/src/r8168_n.c
+++ b/src/r8168_n.c
@@ -43,6 +43,7 @@
 #include <linux/module.h>
 #include <linux/version.h>
 #include <linux/pci.h>
+#include <linux/phy.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/delay.h>
@@ -5369,6 +5370,36 @@ rtl8168_link_down_patch(struct net_devic
 #endif
 }
 
+static unsigned int rtl8168_phy_duplex(u8 status)
+{
+        unsigned int duplex = DUPLEX_UNKNOWN;
+
+        if (status & LinkStatus) {
+                if (status & RTL8168_FULL_DUPLEX_MASK)
+                        duplex = DUPLEX_FULL;
+                else
+                        duplex = DUPLEX_HALF;
+        }
+
+        return duplex;
+}
+
+static int rtl8168_phy_speed(u8 status)
+{
+        int speed = SPEED_UNKNOWN;
+
+        if (status & LinkStatus) {
+                if (status & _1000bpsF)
+                        speed = SPEED_1000;
+                else if (status & _100bps)
+                        speed = SPEED_100;
+                else if (status & _10bps)
+                        speed = SPEED_10;
+        }
+
+        return speed;
+}
+
 static void
 rtl8168_check_link_status(struct net_device *dev)
 {
@@ -5388,11 +5419,18 @@ rtl8168_check_link_status(struct net_dev
                 if (link_status_on) {
                         rtl8168_link_on_patch(dev);
 
-                        if (netif_msg_ifup(tp))
-                                printk(KERN_INFO PFX "%s: link up\n", dev->name);
+                        if (netif_msg_ifup(tp)) {
+                                const u8 phy_status = RTL_R8(tp, PHYstatus);
+                                const unsigned int phy_duplex = rtl8168_phy_duplex(phy_status);
+                                const int phy_speed = rtl8168_phy_speed(phy_status);
+                                printk(KERN_INFO PFX "%s: Link is Up - %s/%s\n",
+                                       dev->name,
+                                       phy_speed_to_str(phy_speed),
+                                       phy_duplex_to_str(phy_duplex));
+                        }
                 } else {
                         if (netif_msg_ifdown(tp))
-                                printk(KERN_INFO PFX "%s: link down\n", dev->name);
+                                printk(KERN_INFO PFX "%s: Link is Down\n", dev->name);
 
                         rtl8168_link_down_patch(dev);
                 }