34018fd419
Removing the sysfs stubs for the Tx FIFOCFG and ATTRELI (stashing) config registers, as these registers may only be configured after a MAC reset, with the controller stopped (i.e. during hw init, at probe() time). The current sysfs stubs allow on-the-fly updates of these registers (the locking measures are useless and only add unecessary code). Changing these registers is discouraged. Only the default values will be used instead. Moreover, the stashing (ATTRELI) configuration options were effectively disabled (didn't get to the hw anyway if changed) because the stashing device_flags (HAS_BD_STASHING|HAS_BUF_STASHING) were "accidentally" cleared during probe(). Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
42 lines
1.3 KiB
Text
42 lines
1.3 KiB
Text
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.
|