From f48c84b18ea62ffec89a2021f58bf621163f83de Mon Sep 17 00:00:00 2001
From: logicog <git@logicog.de>
Date: Wed, 31 Dec 2025 19:40:54 +0100
Subject: [PATCH] Document checksum calculation offload in hardware

---
 uip/uip-conf.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/uip/uip-conf.h b/uip/uip-conf.h
index 8cc73a0..a413c83 100644
--- a/uip/uip-conf.h
+++ b/uip/uip-conf.h
@@ -133,6 +133,10 @@ typedef unsigned short uip_stats_t;
 
 /**
  * UDP checksums on or off
+ * The RTL8372/3 are able to calculate and verify all L2 and L3 checksums
+ * in hardware. The TX checksums are configured in the CPU-tag of outgoing
+ * packets, while the RTL837X_NIC_RX_CTRL register configures the verification
+ * of the checksum of inbound packets and subsequent possible drop.
  *
  * \hideinitializer
  */