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[net-next,v1,0/3] GVE Raw Addressing

Message ID 20200918180720.2080407-1-awogbemila@google.com
Headers show
Series GVE Raw Addressing | expand

Message

David Awogbemila Sept. 18, 2020, 6:07 p.m. UTC 
This  patch set introduces "raw addressing" mode to the GVE driver.
Previously (in "queue_page_list" or "qpl" mode), the driver would
pre-allocate and dma_map buffers to be used on egress and ingress.
On egress, it would copy data from the skb provided to the
pre-allocated buffers - this was expensive.
In raw addressing mode, the driver can avoid this copy and simply
dma_map the skb's data so that the NIC can use it.
On ingress, the driver passes buffers up to the networking stack and
then frees and reallocates buffers when necessary instead of using
skb_copy_to_linear_data.

Catherine Sullivan (3):
  gve: Add support for raw addressing device option
  gve: Add support for raw addressing to the rx path
  gve: Add support for raw addressing in the tx path

 drivers/net/ethernet/google/gve/gve.h        |  40 ++-
 drivers/net/ethernet/google/gve/gve_adminq.c |  61 +++-
 drivers/net/ethernet/google/gve/gve_adminq.h |  15 +-
 drivers/net/ethernet/google/gve/gve_desc.h   |  18 +-
 drivers/net/ethernet/google/gve/gve_main.c   |  12 +-
 drivers/net/ethernet/google/gve/gve_rx.c     | 342 ++++++++++++++-----
 drivers/net/ethernet/google/gve/gve_tx.c     | 207 +++++++++--
 7 files changed, 549 insertions(+), 146 deletions(-)