net: bnxt: Add TX inline buffer infrastructure

Browse source

Add per-ring pre-allocated inline buffer fields (tx_inline_buf,
tx_inline_dma, tx_inline_size) to bnxt_tx_ring_info and helpers to
allocate and free them. A producer and consumer (tx_inline_prod,
tx_inline_cons) are added to track which slot(s) of the inline buffer
are in-use.

The inline buffer will be used by the SW USO path for pre-allocated,
pre-DMA-mapped per-segment header copies. In the future, this
could be extended to support TX copybreak.

Allocation helper is marked __maybe_unused in this commit because it
will be wired in later.

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/20260408230607.2019402-6-joe@dama.to
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Joe Damato 2026-04-08 16:05:54 -07:00 • committed by Jakub Kicinski

parent 3cb430e62c

commit 0c26a0e765

2 changed files with 41 additions and 0 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

35

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

View file

6

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

View file