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net/sfc: conditionally compile support for tunnel packets

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Equal stride super-buffer Rx datapath does not support tunnels, code to
parse tunnel packet types and inner checksum offload is not required and
it is important to be able to compile it out on build time to avoid
extra CPU load.

Cutting of tunnels support relies on compiler optimizaitons to
be able to drop extra checks and branches if tun_ptype is always 0.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>
This commit is contained in:
Andrew Rybchenko 2018-04-19 12:36:52 +01:00 committed by Ferruh Yigit
parent c121f00836
commit 7ee7e57c34
2 changed files with 4 additions and 0 deletions
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2
drivers/net/sfc/sfc_ef10_rx.c
View File

@ -25,6 +25,8 @@
#include "sfc_dp_rx.h"
#include "sfc_kvargs.h"
#include "sfc_ef10.h"
#define SFC_EF10_RX_EV_ENCAP_SUPPORT 1
#include "sfc_ef10_rx_ev.h"
#define sfc_ef10_rx_err(dpq, ...) \

2
drivers/net/sfc/sfc_ef10_rx_ev.h
View File

@ -37,6 +37,7 @@ sfc_ef10_rx_ev_to_offloads(const efx_qword_t rx_ev, struct rte_mbuf *m,
if (unlikely(EFX_TEST_QWORD_BIT(rx_ev, ESF_DZ_RX_PARSE_INCOMPLETE_LBN)))
goto done;
#if SFC_EF10_RX_EV_ENCAP_SUPPORT
switch (EFX_QWORD_FIELD(rx_ev, ESF_EZ_RX_ENCAP_HDR)) {
default:
/* Unexpected encapsulation tag class */
@ -58,6 +59,7 @@ sfc_ef10_rx_ev_to_offloads(const efx_qword_t rx_ev, struct rte_mbuf *m,
tun_ptype = RTE_PTYPE_TUNNEL_NVGRE;
break;
}
#endif
if (tun_ptype == 0) {
ip_csum_err_bit = ESF_DZ_RX_IPCKSUM_ERR_LBN;