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nfp: flower: implement ip fragmentation match offload 

Implement ip fragmentation match offloading for both IPv4 and IPv6. Allows
offloading frag, nofrag, first and nofirstfrag classification.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pieter Jansen van Vuuren 2018-03-26 10:16:38 +02:00 committed by David S. Miller
parent 07e1671cfc
commit 71ea5343a0
3 changed files with 30 additions and 0 deletions
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3
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View File

@ -61,6 +61,9 @@
#define NFP_FLOWER_MASK_MPLS_BOS BIT(8)
#define NFP_FLOWER_MASK_MPLS_Q BIT(0)
#define NFP_FL_IP_FRAG_FIRST BIT(7)
#define NFP_FL_IP_FRAGMENTED BIT(6)
/* Compressed HW representation of TCP Flags */
#define NFP_FL_TCP_FLAG_URG BIT(4)
#define NFP_FL_TCP_FLAG_PSH BIT(3)

12
drivers/net/ethernet/netronome/nfp/flower/match.c
View File

@ -190,6 +190,18 @@ nfp_flower_compile_ip_ext(struct nfp_flower_ip_ext *frame,
if (tcp_flags & TCPHDR_URG)
frame->flags |= NFP_FL_TCP_FLAG_URG;
}
if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_dissector_key_control *key;
key = skb_flow_dissector_target(flow->dissector,
FLOW_DISSECTOR_KEY_CONTROL,
target);
if (key->flags & FLOW_DIS_IS_FRAGMENT)
frame->flags |= NFP_FL_IP_FRAGMENTED;
if (key->flags & FLOW_DIS_FIRST_FRAG)
frame->flags |= NFP_FL_IP_FRAG_FIRST;
}
}
static void

15
drivers/net/ethernet/netronome/nfp/flower/offload.c
View File

@ -48,6 +48,10 @@
(TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST | \
TCPHDR_PSH | TCPHDR_URG)
#define NFP_FLOWER_SUPPORTED_CTLFLAGS \
(FLOW_DIS_IS_FRAGMENT | \
FLOW_DIS_FIRST_FRAG)
#define NFP_FLOWER_WHITELIST_DISSECTOR \
(BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
BIT(FLOW_DISSECTOR_KEY_BASIC) | \
@ -322,6 +326,17 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
}
}
if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
struct flow_dissector_key_control *key_ctl;
key_ctl = skb_flow_dissector_target(flow->dissector,
FLOW_DISSECTOR_KEY_CONTROL,
flow->key);
if (key_ctl->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS)
return -EOPNOTSUPP;
}
ret_key_ls->key_layer = key_layer;
ret_key_ls->key_layer_two = key_layer_two;
ret_key_ls->key_size = key_size;