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* netmap: bridge: fix transmission in busy-wait modeVincenzo Maffione2021-03-301-7/+17
| | | | | | | | | | In busy-wait mode (BUSYWAIT defined), NIOCTXSYNC should be performed after packets have been moved to the TX ring (rather than before). Before the change, moved packets may stall for an indefinite time in the TX ring. MFC after: 1 week
* netmap: bridge: fix NS_MOREFRAG supportVincenzo Maffione2021-01-071-5/+7
| | | | | | | | | | | Support for NS_MOREFRAG is broken, as NS_MOREFRAG is copied from the TX slot to the RX slot rather than the other way around. Also, the NS_MOREFRAG must be copied also in case of packet copy (no zerocopy). Reported by: rajesh1.kumar_amd.com MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D27980
* netmap: bridge: improve readabilityVincenzo Maffione2020-11-221-42/+74
| | | | | | | | | | Multiple cosmetic changes, plus a fix to a verbose print (indicating wrong net->host/host->net direction). MFC after: 3 days Notes: svn path=/head/; revision=367936
* netmap: bridge: switch to libnetmapVincenzo Maffione2020-11-221-17/+20
| | | | | | | | Use the newer libnetmap (included in base) rather than the older nm_open()/nm_close() defined in netmap_user.h Notes: svn path=/head/; revision=367931
* netmap: tools: fix several compiler warningsVincenzo Maffione2020-10-031-2/+2
| | | | | | | MFC after: 1 week Notes: svn path=/head/; revision=366393
* netmap: add man page for the bridge programVincenzo Maffione2018-10-231-39/+60
| | | | | | | | | | | | | | | | Added bridge(8). Also, minor fixes to the netmap "bridge" application: - indentation fixes and code cleanup - better usage description - better processing of netmap flags Reviewed by: 0mp Approved by: gnn (mentor) MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D17664 Notes: svn path=/head/; revision=339659
* Import the current version of netmap, aligned with the one on github.Luigi Rizzo2016-10-161-6/+24
| | | | | | | | | | | | | | | | | | | This commit, long overdue, contains contributions in the last 2 years from Stefano Garzarella, Giuseppe Lettieri, Vincenzo Maffione, including: + fixes on monitor ports + the 'ptnet' virtual device driver, and ptnetmap backend, for high speed virtual passthrough on VMs (bhyve fixes in an upcoming commit) + improved emulated netmap mode + more robust error handling + removal of stale code + various fixes to code and documentation (some mixup between RX and TX parameters, and private and public variables) We also include an additional tool, nmreplay, which is functionally equivalent to tcpreplay but operating on netmap ports. Notes: svn path=/head/; revision=307394
* This new version of netmap brings you the following:Luigi Rizzo2014-02-151-43/+71
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - netmap pipes, providing bidirectional blocking I/O while moving 100+ Mpps between processes using shared memory channels (no mistake: over one hundred million. But mind you, i said *moving* not *processing*); - kqueue support (BHyVe needs it); - improved user library. Just the interface name lets you select a NIC, host port, VALE switch port, netmap pipe, and individual queues. The upcoming netmap-enabled libpcap will use this feature. - optional extra buffers associated to netmap ports, for applications that need to buffer data yet don't want to make copies. - segmentation offloading for the VALE switch, useful between VMs. and a number of bug fixes and performance improvements. My colleagues Giuseppe Lettieri and Vincenzo Maffione did a substantial amount of work on these features so we owe them a big thanks. There are some external repositories that can be of interest: https://code.google.com/p/netmap our public repository for netmap/VALE code, including linux versions and other stuff that does not belong here, such as python bindings. https://code.google.com/p/netmap-libpcap a clone of the libpcap repository with netmap support. With this any libpcap client has access to most netmap feature with no recompilation. E.g. tcpdump can filter packets at 10-15 Mpps. https://code.google.com/p/netmap-ipfw a userspace version of ipfw+dummynet which uses netmap to send/receive packets. Speed is up in the 7-10 Mpps range per core for simple rulesets. Both netmap-libpcap and netmap-ipfw will be merged upstream at some point, but while this happens it is useful to have access to them. And yes, this code will be merged soon. It is infinitely better than the version currently in 10 and 9. MFC after: 3 days Notes: svn path=/head/; revision=261909
* netmap_user.h:Luigi Rizzo2014-01-161-57/+32
| | | | | | | | | | | | | | | | | | | | | add separate rx/tx ring indexes add ring specifier in nm_open device name netmap.c, netmap_vale.c more consistent errno numbers netmap_generic.c correctly handle failure in registering interfaces. tools/tools/netmap/ massive cleanup of the example programs (a lot of common code is now in netmap_user.h.) nm_util.[ch] are going away soon. pcap.c will also go when i commit the native netmap support for libpcap. Notes: svn path=/head/; revision=260700
* It is 2014 and we have a new version of netmap.Luigi Rizzo2014-01-061-18/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most relevant features: - netmap emulation on any NIC, even those without native netmap support. On the ixgbe we have measured about 4Mpps/core/queue in this mode, which is still a lot more than with sockets/bpf. - seamless interconnection of VALE switch, NICs and host stack. If you disable accelerations on your NIC (say em0) ifconfig em0 -txcsum -txcsum you can use the VALE switch to connect the NIC and the host stack: vale-ctl -h valeXX:em0 allowing sharing the NIC with other netmap clients. - THE USER API HAS SLIGHTLY CHANGED (head/cur/tail pointers instead of pointers/count as before). This was unavoidable to support, in the future, multiple threads operating on the same rings. Netmap clients require very small source code changes to compile again. On the plus side, the new API should be easier to understand and the internals are a lot simpler. The manual page has been updated extensively to reflect the current features and give some examples. This is the result of work of several people including Giuseppe Lettieri, Vincenzo Maffione, Michio Honda and myself, and has been financially supported by EU projects CHANGE and OPENLAB, from NetApp University Research Fund, NEC, and of course the Universita` di Pisa. Notes: svn path=/head/; revision=260368
* add a compile-time option to copy packets instead of doingLuigi Rizzo2013-05-301-3/+12
| | | | | | | the buffer swapping. Notes: svn path=/head/; revision=251131
* update the netmap example programs merging some common code in nm_util.cLuigi Rizzo2013-02-171-218/+17
| | | | | | | | pkt-gen now implements several functions (unlimited transmit, receive, ping-pong) and can operate on a 'tap' device. Notes: svn path=/head/; revision=246896
* Fix ioctl type for compiling with clangEd Maste2012-06-281-2/+2
| | | | Notes: svn path=/head/; revision=237729
* A bit of cleanup in the names of fields of netmap-related structures.Luigi Rizzo2012-04-131-3/+5
| | | | | | | | Use the name 'ring' instead of 'queue' in all fields. Bump NETMAP_API. Notes: svn path=/head/; revision=234227
* use getopt to parse options, add one option to setLuigi Rizzo2012-04-121-19/+61
| | | | | | | the wait time for link-up events Notes: svn path=/head/; revision=234168
* A bunch of netmap fixes:Luigi Rizzo2012-02-271-8/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | USERSPACE: 1. add support for devices with different number of rx and tx queues; 2. add better support for zero-copy operation, adding an extra field to the netmap ring to indicate how many buffers we have already processed but not yet released (with help from Eddie Kohler); 3. The two changes above unfortunately require an API change, so while at it add a version field and some spares to the ioctl() argument to help detect mismatches. 4. update the manual page for the two changes above; 5. update sample applications in tools/tools/netmap KERNEL: 1. simplify the internal structures moving the global wait queues to the 'struct netmap_adapter'; 2. simplify the functions that map kring<->nic ring indexes 3. normalize device-specific code, helps mainteinance; 4. start exploring the impact of micro-optimizations (prefetch etc.) in the ixgbe driver. Use 'legacy' descriptors on the tx ring and prefetch slots gives about 20% speedup at 900 MHz. Another 7-10% would come from removing the explict calls to bus_dmamap* in the core (they are effectively NOPs in this case, but it takes expensive load of the per-buffer dma maps to figure out that they are all NULL. Rx performance not investigated. I am postponing the MFC so i can import a few more improvements before merging. Notes: svn path=/head/; revision=232238
* Spelling fixes for tools/Ulrich Spörlein2011-12-301-1/+1
| | | | | | | Add some $FreeBSD$ tags so svn will allow the commit. Notes: svn path=/head/; revision=228975
* Bring in support for netmap, a framework for very efficient packetLuigi Rizzo2011-11-171-0/+456
I/O from userspace, capable of line rate at 10G, see http://info.iet.unipi.it/~luigi/netmap/ At this time I am bringing in only the generic code (sys/dev/netmap/ plus two headers under sys/net/), and some sample applications in tools/tools/netmap. There is also a manpage in share/man/man4 [1] In order to make use of the framework you need to build a kernel with "device netmap", and patch individual drivers with the code that you can find in sys/dev/netmap/head.diff The file will go away as the relevant pieces are committed to the various device drivers, which should happen in a few days after talking to the driver maintainers. Netmap support is available at the moment for Intel 10G and 1G cards (ixgbe, em/lem/igb), and for the Realtek 1G card ("re"). I have partial patches for "bge" and am starting to work on "cxgbe". Hopefully changes are trivial enough so interested third parties can submit their patches. Interested people can contact me for advice on how to add netmap support to specific devices. CREDITS: Netmap has been developed by Luigi Rizzo and other collaborators at the Universita` di Pisa, and supported by EU project CHANGE (http://www.change-project.eu/) The code is distributed under a BSD Copyright. [1] In my opinion is a bad idea to have all manpage in one directory. We should place kernel documentation in the same dir that contains the code, which would make it much simpler to keep doc and code in sync, reduce the clutter in share/man/ and incidentally is the policy used for all of userspace code. Makefiles and doc tools can be trivially adjusted to find the manpages in the relevant subdirs. Notes: svn path=/head/; revision=227614