freebsd-dev/sys/dev/sfxge
Hans Petter Selasky c25290420e Start process of removing the use of the deprecated "M_FLOWID" flag
from the FreeBSD network code. The flag is still kept around in the
"sys/mbuf.h" header file, but does no longer have any users. Instead
the "m_pkthdr.rsstype" field in the mbuf structure is now used to
decide the meaning of the "m_pkthdr.flowid" field. To modify the
"m_pkthdr.rsstype" field please use the existing "M_HASHTYPE_XXX"
macros as defined in the "sys/mbuf.h" header file.

This patch introduces new behaviour in the transmit direction.
Previously network drivers checked if "M_FLOWID" was set in "m_flags"
before using the "m_pkthdr.flowid" field. This check has now now been
replaced by checking if "M_HASHTYPE_GET(m)" is different from
"M_HASHTYPE_NONE". In the future more hashtypes will be added, for
example hashtypes for hardware dedicated flows.

"M_HASHTYPE_OPAQUE" indicates that the "m_pkthdr.flowid" value is
valid and has no particular type. This change removes the need for an
"if" statement in TCP transmit code checking for the presence of a
valid flowid value. The "if" statement mentioned above is now a direct
variable assignment which is then later checked by the respective
network drivers like before.

Additional notes:
- The SCTP code changes will be committed as a separate patch.
- Removal of the "M_FLOWID" flag will also be done separately.
- The FreeBSD version has been bumped.

MFC after:	1 month
Sponsored by:	Mellanox Technologies
2014-12-01 11:45:24 +00:00
..
common cleanup: code style fixes 2014-09-30 20:18:10 +00:00
sfxge_dma.c Properly handle a case that should never happen (the bus_dma 2014-10-02 15:03:51 +00:00
sfxge_ev.c Make size of Tx and Rx rings configurable 2014-09-30 20:36:07 +00:00
sfxge_intr.c cleanup: code style fixes 2014-09-30 20:18:10 +00:00
sfxge_mcdi.c
sfxge_port.c Fixup the setting of the baud rate. 2014-10-02 22:05:48 +00:00
sfxge_rx.c Start process of removing the use of the deprecated "M_FLOWID" flag 2014-12-01 11:45:24 +00:00
sfxge_rx.h Make size of Tx and Rx rings configurable 2014-09-30 20:36:07 +00:00
sfxge_tx.c Start process of removing the use of the deprecated "M_FLOWID" flag 2014-12-01 11:45:24 +00:00
sfxge_tx.h Support tunable to control Tx deferred packet list limits 2014-09-30 20:57:25 +00:00
sfxge.c Make size of Tx and Rx rings configurable 2014-09-30 20:36:07 +00:00
sfxge.h The patch allows to check state of the software Tx queues at run time. 2014-09-30 20:43:21 +00:00