Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst
Source file repositories/reference/linux-study-clean/Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/networking/device_drivers/ethernet/freescale/gianfar.rst- Extension
.rst- Size
- 1498 bytes
- Lines
- 52
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
.. SPDX-License-Identifier: GPL-2.0
===========================
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.Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.