Enable Launch Time Control (LTC) support for XDP zero copy via XDP Tx
metadata framework.
This patch has been tested with tools/testing/selftests/bpf/xdp_hw_metadata
on Intel I225-LM Ethernet controller. Below are the test steps and result.
Test 1: Send a single packet with the launch time set to
Refactor the code for inserting an empty frame into a new function
igc_insert_empty_frame(). This change extracts the logic for inserting
an empty packet from igc_xmit_frame_ring() into a separate function,
allowing it to be reused in future implementations, such as the XDP
zero copy transmit funct
Enable launch time (Time-Based Scheduling) support for XDP zero copy via
the XDP Tx metadata framework.
This patch has been tested with tools/testing/selftests/bpf/xdp_hw_metadata
on Intel Tiger Lake platform. Below are the test steps and result.
Test 1: Send a single packet with the launch time
Add launch time hardware offload request to xdp_hw_metadata. Users can
configure the delta of launch time relative to HW RX-time using the "-l"
argument. By default, the delta is set to 0 ns, which means the launch time
is disabled. By setting the delta to a non-zero value, the launch time
hardware
Extend the XDP Tx metadata framework so that user can requests launch time
hardware offload, where the Ethernet device will schedule the packet for
transmission at a pre-determined time called launch time. The value of
launch time is communicated from user space to Ethernet driver via
launch_time f
This series expands the XDP TX metadata framework to allow user
applications to pass per packet 64-bit launch time directly to the kernel
driver, requesting launch time hardware offload support. The XDP TX
metadata framework will not perform any clock conversion or packet
reordering.
Please note t
On Sunday, February 16, 2025 3:04 AM, Jakub Kicinski wrote:
>On Sat, 15 Feb 2025 11:01:59 -0800 Jakub Kicinski wrote:
>> On Fri, 7 Feb 2025 10:19:39 +0800 Song Yoong Siang wrote:
>> > Extend the XDP Tx metadata framework so that user can requests launch time
>> > hardware offload, where the Ether
On Sat, 15 Feb 2025 11:01:59 -0800 Jakub Kicinski wrote:
> On Fri, 7 Feb 2025 10:19:39 +0800 Song Yoong Siang wrote:
> > Extend the XDP Tx metadata framework so that user can requests launch time
> > hardware offload, where the Ethernet device will schedule the packet for
> > transmission at a pre
On Fri, 7 Feb 2025 10:19:39 +0800 Song Yoong Siang wrote:
> Extend the XDP Tx metadata framework so that user can requests launch time
> hardware offload, where the Ethernet device will schedule the packet for
> transmission at a pre-determined time called launch time. The value of
> launch time i
