freebsd with flexible iflib nic queues
da28723ecd
o Add CTASSERTs ensuring that HME_NRXDESC and HME_NTXDESC are set to
legal values.
o Use appropriate maxsize, nsegments and maxsegsize parameters when
creating DMA tags and correct some comments related to them.
o The FreeBSD bus_dmamap_sync(9) supports ored together flags for quite
some time now so collapse calls accordingly.
o Add missing BUS_DMASYNC_PREREAD when syncing the control DMA maps in
hme_rint() and hme_start_locked().
o Keep state of the link state and use it to enable or disable the MAC
in hme_mii_statchg() accordingly as well as to return early from
hme_start_locked() in case the link is down.
o Introduce a sc_flags and use it to replace individual members like
sc_pci.
o Add bus_barrier(9) calls to hme_mac_bitflip(), hme_mii_readreg(),
hme_mii_writereg() and hme_stop() to ensure the respective bit
has been written before we starting polling on it and for the right
bits to change.
o Rather just returning in case hme_mac_bitflip() fails and leaving us
in an undefined state report the problem and move on; chances are
the requested configuration will become active shortly after.
o Don't call hme_start_locked() in hme_init_locked() unconditionally
but only after calls to hme_init_locked() when it's appropriate, i.e.
in hme_watchdog().
o Add a KASSERT which asserts nsegs is valid also to hme_load_txmbuf().
o In hme_load_txmbuf():
- use a maximum of the newly introduced HME_NTXSEGS segments instead
of the incorrect HME_NTXQ, which reflects the maximum TX queue
length, for loading the mbufs and put the DMA segments back onto
the stack instead of the softc as 16 should be ok there.
- use the common errno(2) return values instead of homegrown ones,
- given that hme_load_txmbuf() is allowed to fail resulting in a
packet drop for quite some time now implement the functionality of
hme_txcksum() by means of m_pullup(9), which de-obfuscates the code
and allows to always retrieve the correct length of the IP header, [1]
- also add a KASSERT which asserts nsegs is valid,
- take advantage of m_collapse(9) instead of m_defrag(9) for
performance reasons.
o Don't bother to check whether the interface is running or whether its
queue is empty before calling hme_start_locked() in hme_tint(), the
former will check these anyway.
o In hme_intr() call hme_rint() before hme_tint() as gem_tint() may
take quite a while to return when it calls hme_start_locked().
o Get rid of sc_debug and just check if_flags for IFF_DEBUG directly.
o Add a shadow sc_ifflags so we don't reset the chip when unnecessary.
o Handle IFF_ALLMULTI correctly. [2]
o Use PCIR_BAR instead of a homegrown macro.
o Replace sc_enaddr[6] with sc_enaddr[ETHER_ADDR_LEN].
o Use the maximum of 256 TX descriptors for better performance as using
all of them has no additional static cost rather than using just half
of them.
Reported by: rwatson [2]
Suggested by: yongari [1]
Reviewed by: yongari
MFC after: 1 month
|
||
|---|---|---|
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html