net: bnxt: Add SW GSO completion and teardown support

Browse source

Update __bnxt_tx_int and bnxt_free_one_tx_ring_skbs to handle SW GSO
segments:

- MID segments: adjust tx_pkts/tx_bytes accounting and skip skb free
  (the skb is shared across all segments and freed only once)

- LAST segments: call tso_dma_map_complete() to tear down the IOVA
  mapping if one was used. On the fallback path, payload DMA unmapping
  is handled by the existing per-BD dma_unmap_len walk.

Both MID and LAST completions advance tx_inline_cons to release the
segment's inline header slot back to the ring.

is_sw_gso is initialized to zero, so the new code paths are not run.

Add logic for feature advertisement and guardrails for ring sizing.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260408230607.2019402-9-joe@dama.to
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Joe Damato 2026-04-08 16:05:57 -07:00 • committed by Jakub Kicinski

parent cc5d90667d

commit 87550ba2dc

3 changed files with 92 additions and 11 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

75

drivers/net/ethernet/broadcom/bnxt/bnxt.c

View file

19

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

View file

9

drivers/net/ethernet/broadcom/bnxt/bnxt_gso.h

View file