From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../device_drivers/ethernet/freescale/gianfar.rst | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst (limited to 'Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst') diff --git a/Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst b/Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst new file mode 100644 index 000000000..9c4a91d38 --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst @@ -0,0 +1,51 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=========================== +The Gianfar Ethernet Driver +=========================== + +:Author: Andy Fleming +:Updated: 2005-07-28 + + +Checksum Offloading +=================== + +The eTSEC controller (first included in parts from late 2005 like +the 8548) has the ability to perform TCP, UDP, and IP checksums +in hardware. The Linux kernel only offloads the TCP and UDP +checksums (and always performs the pseudo header checksums), so +the driver only supports checksumming for TCP/IP and UDP/IP +packets. Use ethtool to enable or disable this feature for RX +and TX. + +VLAN +==== + +In order to use VLAN, please consult Linux documentation on +configuring VLANs. The gianfar driver supports hardware insertion and +extraction of VLAN headers, but not filtering. Filtering will be +done by the kernel. + +Multicasting +============ + +The gianfar driver supports using the group hash table on the +TSEC (and the extended hash table on the eTSEC) for multicast +filtering. On the eTSEC, the exact-match MAC registers are used +before the hash tables. See Linux documentation on how to join +multicast groups. + +Padding +======= + +The gianfar driver supports padding received frames with 2 bytes +to align the IP header to a 16-byte boundary, when supported by +hardware. + +Ethtool +======= + +The gianfar driver supports the use of ethtool for many +configuration options. You must run ethtool only on currently +open interfaces. See ethtool documentation for details. -- cgit v1.2.3