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sfxge(4): report support for Tx checksum op descriptors

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FreeBSD driver needs a patch to provide a means for packets
which do not need checksum offload but have flow ID set
to avoid hitting only the first Tx queue (which has been used
for packets not needing checksum offload).

This should be possible on Huntington, Medford or Medford2 chips
since these support toggling checksum offload on any given queue
dynamically by means of pushing option descriptors.

The patch for FreeBSD driver will then need a means to figure out
whether the feature can be used, and testing adapter family might
not be a good solution.

This patch adds a feature bit specifically to indicate support
for checksum option descriptors. The new feature bits may have
more users in future, apart from the mentioned FreeBSD patch.

Submitted by:   Ivan Malov <Ivan.Malov at oktetlabs.ru>
Sponsored by:   Solarflare Communications, Inc.
MFC after:      1 week
Differential Revision:  https://reviews.freebsd.org/D18388
This commit is contained in:
arybchik 2018-12-10 09:35:45 +00:00
parent 61f3f706aa
commit 641fe3596f
2 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/dev/sfxge/common/efx.h
View File

@ -1261,6 +1261,7 @@ efx_bist_stop(
#define EFX_FEATURE_FW_ASSISTED_TSO 0x00001000
#define EFX_FEATURE_FW_ASSISTED_TSO_V2 0x00002000
#define EFX_FEATURE_PACKED_STREAM 0x00004000
#define EFX_FEATURE_TXQ_CKSUM_OP_DESC 0x00008000
typedef enum efx_tunnel_protocol_e {
EFX_TUNNEL_PROTOCOL_NONE = 0,

9
sys/dev/sfxge/common/efx_nic.c
View File

@ -257,7 +257,8 @@ efx_nic_create(
EFX_FEATURE_PIO_BUFFERS |
EFX_FEATURE_FW_ASSISTED_TSO |
EFX_FEATURE_FW_ASSISTED_TSO_V2 |
EFX_FEATURE_PACKED_STREAM;
EFX_FEATURE_PACKED_STREAM |
EFX_FEATURE_TXQ_CKSUM_OP_DESC;
break;
#endif /* EFSYS_OPT_HUNTINGTON */
@ -277,7 +278,8 @@ efx_nic_create(
EFX_FEATURE_MCDI_DMA |
EFX_FEATURE_PIO_BUFFERS |
EFX_FEATURE_FW_ASSISTED_TSO_V2 |
EFX_FEATURE_PACKED_STREAM;
EFX_FEATURE_PACKED_STREAM |
EFX_FEATURE_TXQ_CKSUM_OP_DESC;
break;
#endif /* EFSYS_OPT_MEDFORD */
@ -293,7 +295,8 @@ efx_nic_create(
EFX_FEATURE_MCDI_DMA |
EFX_FEATURE_PIO_BUFFERS |
EFX_FEATURE_FW_ASSISTED_TSO_V2 |
EFX_FEATURE_PACKED_STREAM;
EFX_FEATURE_PACKED_STREAM |
EFX_FEATURE_TXQ_CKSUM_OP_DESC;
break;
#endif /* EFSYS_OPT_MEDFORD2 */