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| -rw-r--r-- | Documentation/networking/gianfar.txt | 42 |
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diff --git a/Documentation/networking/gianfar.txt b/Documentation/networking/gianfar.txt new file mode 100644 index 000000000..ba1daea7f --- /dev/null +++ b/Documentation/networking/gianfar.txt @@ -0,0 +1,42 @@ +The Gianfar Ethernet Driver + +Author: Andy Fleming <afleming@freescale.com> +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. |