Commit 273a2397 authored by Arthur Kiyanovski's avatar Arthur Kiyanovski Committed by Jakub Kicinski
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net: ena: Update LLQ header length in ena documentation 



LLQ entry length is 128 bytes. Therefore the maximum header in
the entry is calculated by:
tx_max_header_size =
LLQ_ENTRY_SIZE - DESCRIPTORS_NUM_BEFORE_HEADER * 16 =
128 - 2 * 16 = 96

This patch updates the documentation so that it states the correct
max header length.

Signed-off-by: default avatarShay Agroskin <shayagr@amazon.com>
Signed-off-by: default avatarArthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 394c48e0

Documentation/networking/device_drivers/ethernet/amazon/ena.rst

+1 −1
Original line number Diff line number Diff line
@@ -135,7 +135,7 @@ The ENA driver supports two Queue Operation modes for Tx SQs: 


- **Low Latency Queue (LLQ) mode or "push-mode":**

  In this mode the driver pushes the transmit descriptors and the

  first 128 bytes of the packet directly to the ENA device memory

  first 96 bytes of the packet directly to the ENA device memory

  space. The rest of the packet payload is fetched by the

  device. For this operation mode, the driver uses a dedicated PCI

  device memory BAR, which is mapped with write-combine capability.