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42 lines
1.3 KiB
42 lines
1.3 KiB
The Gianfar Ethernet Driver |
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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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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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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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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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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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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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