52 lines
1.5 KiB
ReStructuredText
52 lines
1.5 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0
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===========================
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The Gianfar Ethernet Driver
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===========================
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:Author: Andy Fleming <afleming@freescale.com>
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:Updated: 2005-07-28
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Checksum Offloading
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===================
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The eTSEC controller (first included in parts from late 2005 like
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the 8548) has the ability to perform TCP, UDP, and IP checksums
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in hardware. The Linux kernel only offloads the TCP and UDP
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checksums (and always performs the pseudo header checksums), so
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the driver only supports checksumming for TCP/IP and UDP/IP
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packets. Use ethtool to enable or disable this feature for RX
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and TX.
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VLAN
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====
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In order to use VLAN, please consult Linux documentation on
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configuring VLANs. The gianfar driver supports hardware insertion and
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extraction of VLAN headers, but not filtering. Filtering will be
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done by the kernel.
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Multicasting
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============
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The gianfar driver supports using the group hash table on the
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TSEC (and the extended hash table on the eTSEC) for multicast
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filtering. On the eTSEC, the exact-match MAC registers are used
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before the hash tables. See Linux documentation on how to join
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multicast groups.
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Padding
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=======
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The gianfar driver supports padding received frames with 2 bytes
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to align the IP header to a 16-byte boundary, when supported by
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hardware.
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Ethtool
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=======
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The gianfar driver supports the use of ethtool for many
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configuration options. You must run ethtool only on currently
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open interfaces. See ethtool documentation for details.
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