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include: net: ethernet.h: Clarify checksum offloading options

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Both ETHERNET_HW_TX_CHKSUM_OFFLOAD and ETHERNET_HW_RX_CHKSUM_OFFLOAD
apply to all of IPv4, UDP, and TCP heafers (there's no checksum in
IPv6 header). Consequently, these options should be enabled only for
hardware which supports offloading for all of these options. (And
hardware which has fine-grained control over individual protocol
headers, should enable them all).

Based on the handling in the current source code and discussion
in #21269.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This commit is contained in:
Paul Sokolovsky 2019-12-16 18:49:33 +03:00 • committed by Jukka Rissanen
commit 3e706833bd
1 changed files with 2 additions and 2 deletions
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4
include/net/ethernet.h
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@ -82,10 +82,10 @@ struct net_eth_addr {
/** Ethernet hardware capabilities */
enum ethernet_hw_caps {
/** TX Checksum offloading supported */
/** TX Checksum offloading supported for all of IPv4, UDP, TCP */
ETHERNET_HW_TX_CHKSUM_OFFLOAD = BIT(0),
/** RX Checksum offloading supported */
/** RX Checksum offloading supported for all of IPv4, UDP, TCP */
ETHERNET_HW_RX_CHKSUM_OFFLOAD = BIT(1),
/** VLAN supported */