openwrt/package/kernel/r8126/patches/200-r8126-print-link-speed-and-duplex-mode.patch

From 5ca1d47e065c0318774a946ffdf76010c78cc164 Mon Sep 17 00:00:00 2001
From: Chukun Pan <amadeus@jmu.edu.cn>
Date: Sat, 10 Aug 2024 20:16:32 +0800
Subject: [PATCH] r8126: 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: Chukun Pan <amadeus@jmu.edu.cn>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---
 src/r8126.h   |  2 ++
 src/r8126_n.c | 48 +++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 47 insertions(+), 3 deletions(-)

--- a/src/r8126.h
+++ b/src/r8126.h
@@ -1561,6 +1561,8 @@ enum RTL8126_register_content {
         LinkStatus = 0x02,
         FullDup = 0x01,
 
+#define RTL8126_FULL_DUPLEX_MASK (_5000bpsF | _2500bpsF | _1000bpsF | FullDup)
+
         /* DBG_reg */
         Fix_Nak_1 = (1 << 4),
         Fix_Nak_2 = (1 << 3),
--- a/src/r8126_n.c
+++ b/src/r8126_n.c
@@ -39,6 +39,7 @@
 #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>
@@ -4740,6 +4741,40 @@ rtl8126_link_down_patch(struct net_devic
 #endif
 }
 
+static unsigned int rtl8126_phy_duplex(u16 status)
+{
+        unsigned int duplex = DUPLEX_UNKNOWN;
+
+        if (status & LinkStatus) {
+                if (status & RTL8126_FULL_DUPLEX_MASK)
+                        duplex = DUPLEX_FULL;
+                else
+                        duplex = DUPLEX_HALF;
+        }
+
+        return duplex;
+}
+
+static int rtl8126_phy_speed(u16 status)
+{
+        int speed = SPEED_UNKNOWN;
+
+        if (status & LinkStatus) {
+                if (status & _5000bpsF)
+                        speed = SPEED_5000;
+                else if (status & _2500bpsF)
+                        speed = SPEED_2500;
+                else if (status & _1000bpsF)
+                        speed = SPEED_1000;
+                else if (status & _100bps)
+                        speed = SPEED_100;
+                else if (status & _10bps)
+                        speed = SPEED_10;
+        }
+
+        return speed;
+}
+
 static void
 _rtl8126_check_link_status(struct net_device *dev)
 {
@@ -4748,11 +4783,18 @@ _rtl8126_check_link_status(struct net_de
         if (tp->link_ok(dev)) {
                 rtl8126_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 u16 phy_status = RTL_R16(tp, PHYstatus);
+                        const unsigned int phy_duplex = rtl8126_phy_duplex(phy_status);
+                        const int phy_speed = rtl8126_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);
 
                 rtl8126_link_down_patch(dev);
         }