[virtio-comment] [PATCH REQUIREMENTS v2 7/7] net-features: Add header data split requirements

[Parav Pandit <parav@nvidia.com>]

Add header data split requirements for the receive packets.

Signed-off-by: Parav Pandit <parav@nvidia.com>
---
 net-workstream/features-1.4.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/net-workstream/features-1.4.md b/net-workstream/features-1.4.md
index 466e4db..1bbf430 100644
--- a/net-workstream/features-1.4.md
+++ b/net-workstream/features-1.4.md
@@ -11,6 +11,7 @@ together is desired while updating the virtio net interface.
 3. Virtqueue notification coalescing re-arming support
 4  Virtqueue receive flow filters (RFF)
 5. Device timestamp for tx and rx packets
+6. Header data split for the receive virtqueue
 
 # 3. Requirements
 ## 3.1 Device counters
@@ -293,3 +294,15 @@ struct virtio_net_rff_delete {
    point of reception from the network.
 3. The device should provide a receive packet timestamp in a single DMA
    transaction along with the rest of the receive completion fields.
+
+## 3.6 Header data split for the receive virtqueue
+1. The device should be able to DMA the packet header and data to two different
+   memory locations, this enables driver and networking stack to perform zero
+   copy to application buffer(s).
+2. The driver should be able to configure maximum header buffer size per
+   virtqueue.
+3. The header buffer to be in a physically contiguous memory per virtqueue
+4. The device should be able to indicate header data split in the receive
+   completion.
+5. The device should be able to zero pad the header buffer when the received
+   header is shorter than cpu cache line size.
-- 
2.26.2


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