projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f7f5316 | 1 | The Gianfar Ethernet Driver |
| 7f7f5316 AF |
2 | |
| 3 | Author: Andy Fleming <afleming@freescale.com> | |
| 4 | Updated: 2005-07-28 | |
| 5 | ||
| 7f7f5316 AF |
6 | |
| 7 | CHECKSUM OFFLOADING | |
| 8 | ||
| 9 | The eTSEC controller (first included in parts from late 2005 like | |
| 10 | the 8548) has the ability to perform TCP, UDP, and IP checksums | |
| 11 | in hardware. The Linux kernel only offloads the TCP and UDP | |
| 12 | checksums (and always performs the pseudo header checksums), so | |
| 13 | the driver only supports checksumming for TCP/IP and UDP/IP | |
| 14 | packets. Use ethtool to enable or disable this feature for RX | |
| 15 | and TX. | |
| 16 | ||
| 17 | VLAN | |
| 18 | ||
| 19 | In order to use VLAN, please consult Linux documentation on | |
| 20 | configuring VLANs. The gianfar driver supports hardware insertion and | |
| 21 | extraction of VLAN headers, but not filtering. Filtering will be | |
| 22 | done by the kernel. | |
| 23 | ||
| 24 | MULTICASTING | |
| 25 | ||
| 26 | The gianfar driver supports using the group hash table on the | |
| 27 | TSEC (and the extended hash table on the eTSEC) for multicast | |
| 28 | filtering. On the eTSEC, the exact-match MAC registers are used | |
| 29 | before the hash tables. See Linux documentation on how to join | |
| 30 | multicast groups. | |
| 31 | ||
| 32 | PADDING | |
| 33 | ||
| 34 | The gianfar driver supports padding received frames with 2 bytes | |
| 35 | to align the IP header to a 16-byte boundary, when supported by | |
| 36 | hardware. | |
| 37 | ||
| 38 | ETHTOOL | |
| 39 | ||
| 40 | The gianfar driver supports the use of ethtool for many | |
| 41 | configuration options. You must run ethtool only on currently | |
| 42 | open interfaces. See ethtool documentation for details. |