tree 58958a838ca5473e40db5bc47b13dd1b78365c49
parent 9463db0a70b31e87fbaac18878b9e59992011c9d
author Pranjal Shrivastava <praan@google.com> 1757359053 +0000
committer Kevin Berry <kpberry@google.com> 1757470437 -0700

BACKPORT: gve: support unreadable netmem

Declare PP_FLAG_ALLOW_UNREADABLE_NETMEM to turn on unreadable netmem
support in GVE.

We also drop any net_iov packets where header split is not enabled.
We're unable to process packets where the header landed in unreadable
netmem.

Use page_pool_dma_sync_netmem_for_cpu in lieu of
dma_sync_single_range_for_cpu to correctly handle unreadable netmem
that should not be dma-sync'd.

Disable rx_copybreak optimization if payload is unreadable netmem as
that needs access to the payload.

cos-patch: bug
Change-Id: Ifda3d6aaf353da7dfc818ea3eb21ca16723bf936
Signed-off-by: Mina Almasry <almasrymina@google.com>
Signed-off-by: Ziwei Xiao <ziweixiao@google.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Pranjal Shrivastava <praan@google.com>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/110942
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Kevin Berry <kpberry@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>