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vlib: refactor checksum offload support

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Type: refactor

This patch refactors the offload flags in vlib_buffer_t.
There are two main reasons behind this refactoring.
First, offload flags are insufficient to represent outer
and inner headers offloads. Second, room for these flags
in first cacheline of vlib_buffer_t is also limited.

This patch introduces a generic offload flag in first
cacheline. And detailed offload flags in 2nd cacheline
of the structure for performance optimization.

Change-Id: Icc363a142fb9208ec7113ab5bbfc8230181f6004
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
This commit is contained in:
Mohsin Kazmi
2021-02-10 11:26:24 +01:00
committed by Damjan Marion
parent 99c6dc6a7a
commit 6809538e64
34 changed files with 376 additions and 263 deletions
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14
src/plugins/avf/output.c
View File

@@ -57,12 +57,12 @@ static_always_inline u64
avf_tx_prepare_cksum (vlib_buffer_t * b, u8 is_tso)
{
u64 flags = 0;
if (!is_tso && !(b->flags & ((VNET_BUFFER_F_OFFLOAD_IP_CKSUM |
VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))))
if (!is_tso && !(b->flags & VNET_BUFFER_F_OFFLOAD))
return 0;
u32 is_tcp = is_tso || b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
u32 is_udp = !is_tso && b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
u32 oflags = vnet_buffer2 (b)->oflags;
u32 is_tcp = is_tso || oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
u32 is_udp = !is_tso && oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
u32 is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
u32 is_ip6 = b->flags & VNET_BUFFER_F_IS_IP6;
ASSERT (!is_tcp || !is_udp);
@@ -173,9 +173,7 @@ avf_tx_enqueue (vlib_main_t * vm, vlib_node_runtime_t * node, avf_txq_t * txq,
{
u16 next = txq->next;
u64 bits = AVF_TXD_CMD_EOP | AVF_TXD_CMD_RSV;
const u32 offload_mask = VNET_BUFFER_F_OFFLOAD_IP_CKSUM |
VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
VNET_BUFFER_F_GSO;
const u32 offload_mask = VNET_BUFFER_F_OFFLOAD | VNET_BUFFER_F_GSO;
u64 one_by_one_offload_flags = 0;
int is_tso;
u16 n_desc = 0;