freebsd-dev/sys/net/netmap.h

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2011-2014 Matteo Landi, Luigi Rizzo. All rights reserved.
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``S IS''AND
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
/*
* $FreeBSD$
*
* Definitions of constants and the structures used by the netmap
* framework, for the part visible to both kernel and userspace.
* Detailed info on netmap is available with "man netmap" or at
*
* http://info.iet.unipi.it/~luigi/netmap/
*
* This API is also used to communicate with the VALE software switch
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
#ifndef _NET_NETMAP_H_
#define _NET_NETMAP_H_
#define NETMAP_API 14 /* current API version */
#define NETMAP_MIN_API 14 /* min and max versions accepted */
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
#define NETMAP_MAX_API 15
/*
* Some fields should be cache-aligned to reduce contention.
* The alignment is architecture and OS dependent, but rather than
* digging into OS headers to find the exact value we use an estimate
* that should cover most architectures.
*/
#define NM_CACHE_ALIGN 128
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
* --- Netmap data structures ---
*
* The userspace data structures used by netmap are shown below.
* They are allocated by the kernel and mmap()ed by userspace threads.
* Pointers are implemented as memory offsets or indexes,
* so that they can be easily dereferenced in kernel and userspace.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
KERNEL (opaque, obviously)
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
====================================================================
|
USERSPACE | struct netmap_ring
+---->+---------------+
/ | head,cur,tail |
struct netmap_if (nifp, 1 per fd) / | buf_ofs |
+----------------+ / | other fields |
| ni_tx_rings | / +===============+
| ni_rx_rings | / | buf_idx, len | slot[0]
| | / | flags, ptr |
| | / +---------------+
+================+ / | buf_idx, len | slot[1]
| txring_ofs[0] | (rel.to nifp)--' | flags, ptr |
| txring_ofs[1] | +---------------+
(tx+htx entries) (num_slots entries)
| txring_ofs[t] | | buf_idx, len | slot[n-1]
+----------------+ | flags, ptr |
| rxring_ofs[0] | +---------------+
| rxring_ofs[1] |
(rx+hrx entries)
| rxring_ofs[r] |
+----------------+
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
* For each "interface" (NIC, host stack, PIPE, VALE switch port) bound to
* a file descriptor, the mmap()ed region contains a (logically readonly)
* struct netmap_if pointing to struct netmap_ring's.
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
* There is one netmap_ring per physical NIC ring, plus at least one tx/rx ring
* pair attached to the host stack (these pairs are unused for non-NIC ports).
*
* All physical/host stack ports share the same memory region,
* so that zero-copy can be implemented between them.
* VALE switch ports instead have separate memory regions.
*
* The netmap_ring is the userspace-visible replica of the NIC ring.
* Each slot has the index of a buffer (MTU-sized and residing in the
* mmapped region), its length and some flags. An extra 64-bit pointer
* is provided for user-supplied buffers in the tx path.
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* In user space, the buffer address is computed as
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
* (char *)ring + buf_ofs + index * NETMAP_BUF_SIZE
*
* Added in NETMAP_API 11:
*
* + NIOCREGIF can request the allocation of extra spare buffers from
* the same memory pool. The desired number of buffers must be in
* nr_arg3. The ioctl may return fewer buffers, depending on memory
* availability. nr_arg3 will return the actual value, and, once
* mapped, nifp->ni_bufs_head will be the index of the first buffer.
*
* The buffers are linked to each other using the first uint32_t
* as the index. On close, ni_bufs_head must point to the list of
* buffers to be released.
*
* + NIOCREGIF can attach to PIPE rings sharing the same memory
* space with a parent device. The ifname indicates the parent device,
* which must already exist. Flags in nr_flags indicate if we want to
* bind the master or slave side, the index (from nr_ringid)
* is just a cookie and does not need to be sequential.
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
* + NIOCREGIF can also attach to 'monitor' rings that replicate
* the content of specific rings, also from the same memory space.
*
* Extra flags in nr_flags support the above functions.
* Application libraries may use the following naming scheme:
* netmap:foo all NIC rings pairs
* netmap:foo^ only host rings pairs
* netmap:foo^k the k-th host rings pair
* netmap:foo+ all NIC rings + host rings pairs
* netmap:foo-k the k-th NIC rings pair
* netmap:foo{k PIPE rings pair k, master side
* netmap:foo}k PIPE rings pair k, slave side
*
* Some notes about host rings:
*
* + The RX host rings are used to store those packets that the host network
* stack is trying to transmit through a NIC queue, but only if that queue
* is currently in netmap mode. Netmap will not intercept host stack mbufs
* designated to NIC queues that are not in netmap mode. As a consequence,
* registering a netmap port with netmap:foo^ is not enough to intercept
* mbufs in the RX host rings; the netmap port should be registered with
* netmap:foo*, or another registration should be done to open at least a
* NIC TX queue in netmap mode.
*
* + Netmap is not currently able to deal with intercepted transmit mbufs which
* require offloadings like TSO, UFO, checksumming offloadings, etc. It is
* responsibility of the user to disable those offloadings (e.g. using
* ifconfig on FreeBSD or ethtool -K on Linux) for an interface that is being
* used in netmap mode. If the offloadings are not disabled, GSO and/or
* unchecksummed packets may be dropped immediately or end up in the host RX
* rings, and will be dropped as soon as the packet reaches another netmap
* adapter.
*/
/*
* struct netmap_slot is a buffer descriptor
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
struct netmap_slot {
uint32_t buf_idx; /* buffer index */
uint16_t len; /* length for this slot */
uint16_t flags; /* buf changed, etc. */
uint64_t ptr; /* pointer for indirect buffers */
};
/*
* The following flags control how the slot is used
*/
#define NS_BUF_CHANGED 0x0001 /* buf_idx changed */
/*
* must be set whenever buf_idx is changed (as it might be
* necessary to recompute the physical address and mapping)
2015-07-10 05:51:36 +00:00
*
* It is also set by the kernel whenever the buf_idx is
* changed internally (e.g., by pipes). Applications may
* use this information to know when they can reuse the
* contents of previously prepared buffers.
*/
#define NS_REPORT 0x0002 /* ask the hardware to report results */
/*
* Request notification when slot is used by the hardware.
* Normally transmit completions are handled lazily and
* may be unreported. This flag lets us know when a slot
* has been sent (e.g. to terminate the sender).
*/
#define NS_FORWARD 0x0004 /* pass packet 'forward' */
/*
* (Only for physical ports, rx rings with NR_FORWARD set).
* Slot released to the kernel (i.e. before ring->head) with
* this flag set are passed to the peer ring (host/NIC),
* thus restoring the host-NIC connection for these slots.
* This supports efficient traffic monitoring or firewalling.
*/
#define NS_NO_LEARN 0x0008 /* disable bridge learning */
/*
* On a VALE switch, do not 'learn' the source port for
* this buffer.
*/
#define NS_INDIRECT 0x0010 /* userspace buffer */
/*
* (VALE tx rings only) data is in a userspace buffer,
* whose address is in the 'ptr' field in the slot.
*/
#define NS_MOREFRAG 0x0020 /* packet has more fragments */
/*
* (VALE ports, ptnetmap ports and some NIC ports, e.g.
* ixgbe and i40e on Linux)
* Set on all but the last slot of a multi-segment packet.
* The 'len' field refers to the individual fragment.
*/
#define NS_TXMON 0x0040
/* (monitor ports only) the packet comes from the TX
* ring of the monitored port
*/
#define NS_PORT_SHIFT 8
#define NS_PORT_MASK (0xff << NS_PORT_SHIFT)
/*
* The high 8 bits of the flag, if not zero, indicate the
* destination port for the VALE switch, overriding
* the lookup table.
*/
#define NS_RFRAGS(_slot) ( ((_slot)->flags >> 8) & 0xff)
/*
* (VALE rx rings only) the high 8 bits
* are the number of fragments.
*/
#define NETMAP_MAX_FRAGS 64 /* max number of fragments */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
* struct netmap_ring
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* Netmap representation of a TX or RX ring (also known as "queue").
* This is a queue implemented as a fixed-size circular array.
* At the software level the important fields are: head, cur, tail.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
* In TX rings:
*
* head first slot available for transmission.
* cur wakeup point. select() and poll() will unblock
* when 'tail' moves past 'cur'
* tail (readonly) first slot reserved to the kernel
*
* [head .. tail-1] can be used for new packets to send;
* 'head' and 'cur' must be incremented as slots are filled
* with new packets to be sent;
* 'cur' can be moved further ahead if we need more space
* for new transmissions. XXX todo (2014-03-12)
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
* In RX rings:
*
* head first valid received packet
* cur wakeup point. select() and poll() will unblock
* when 'tail' moves past 'cur'
* tail (readonly) first slot reserved to the kernel
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
* [head .. tail-1] contain received packets;
* 'head' and 'cur' must be incremented as slots are consumed
* and can be returned to the kernel;
* 'cur' can be moved further ahead if we want to wait for
* new packets without returning the previous ones.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
* DATA OWNERSHIP/LOCKING:
* The netmap_ring, and all slots and buffers in the range
* [head .. tail-1] are owned by the user program;
* the kernel only accesses them during a netmap system call
* and in the user thread context.
*
* Other slots and buffers are reserved for use by the kernel
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
struct netmap_ring {
/*
* buf_ofs is meant to be used through macros.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* It contains the offset of the buffer region from this
* descriptor.
*/
const int64_t buf_ofs;
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
const uint32_t num_slots; /* number of slots in the ring. */
const uint32_t nr_buf_size;
const uint16_t ringid;
const uint16_t dir; /* 0: tx, 1: rx */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
uint32_t head; /* (u) first user slot */
uint32_t cur; /* (u) wakeup point */
uint32_t tail; /* (k) first kernel slot */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
uint32_t flags;
struct timeval ts; /* (k) time of last *sync() */
/* offset_mask is used to isolate the part of the ptr field
* in the slots used to contain an offset in the buffer.
* It is zero if the ring has not be opened using the
* NETMAP_REQ_OPT_OFFSETS option.
*/
const uint64_t offset_mask;
/* the alignment requirement, in bytes, for the start
* of the packets inside the buffers.
* User programs should take this alignment into
* account when specifying buffer-offsets in TX slots.
*/
const uint64_t buf_align;
/* opaque room for a mutex or similar object */
#if !defined(_WIN32) || defined(__CYGWIN__)
uint8_t __attribute__((__aligned__(NM_CACHE_ALIGN))) sem[128];
#else
uint8_t __declspec(align(NM_CACHE_ALIGN)) sem[128];
#endif
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/* the slots follow. This struct has variable size */
struct netmap_slot slot[0]; /* array of slots. */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
};
/*
* RING FLAGS
*/
#define NR_TIMESTAMP 0x0002 /* set timestamp on *sync() */
/*
* updates the 'ts' field on each netmap syscall. This saves
* saves a separate gettimeofday(), and is not much worse than
* software timestamps generated in the interrupt handler.
*/
#define NR_FORWARD 0x0004 /* enable NS_FORWARD for ring */
/*
* Enables the NS_FORWARD slot flag for the ring.
*/
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/*
* Helper functions for kernel and userspace
*/
/*
* Check if space is available in the ring. We use ring->head, which
* points to the next netmap slot to be published to netmap. It is
* possible that the applications moves ring->cur ahead of ring->tail
* (e.g., by setting ring->cur <== ring->tail), if it wants more slots
* than the ones currently available, and it wants to be notified when
* more arrive. See netmap(4) for more details and examples.
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*/
static inline int
nm_ring_empty(struct netmap_ring *ring)
{
return (ring->head == ring->tail);
2018-04-12 07:20:50 +00:00
}
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
* Netmap representation of an interface and its queue(s).
* This is initialized by the kernel when binding a file
* descriptor to a port, and should be considered as readonly
* by user programs. The kernel never uses it.
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* There is one netmap_if for each file descriptor on which we want
* to select/poll.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* select/poll operates on one or all pairs depending on the value of
* nmr_queueid passed on the ioctl.
*/
struct netmap_if {
char ni_name[IFNAMSIZ]; /* name of the interface. */
const uint32_t ni_version; /* API version, currently unused */
const uint32_t ni_flags; /* properties */
#define NI_PRIV_MEM 0x1 /* private memory region */
/*
* The number of packet rings available in netmap mode.
* Physical NICs can have different numbers of tx and rx rings.
* Physical NICs also have at least a 'host' rings pair.
* Additionally, clients can request additional ring pairs to
* be used for internal communication.
*/
const uint32_t ni_tx_rings; /* number of HW tx rings */
const uint32_t ni_rx_rings; /* number of HW rx rings */
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
uint32_t ni_bufs_head; /* head index for extra bufs */
const uint32_t ni_host_tx_rings; /* number of SW tx rings */
const uint32_t ni_host_rx_rings; /* number of SW rx rings */
uint32_t ni_spare1[3];
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
* The following array contains the offset of each netmap ring
* from this structure, in the following order:
* - NIC tx rings (ni_tx_rings);
* - host tx rings (ni_host_tx_rings);
* - NIC rx rings (ni_rx_rings);
* - host rx ring (ni_host_rx_rings);
*
* The area is filled up by the kernel on NETMAP_REQ_REGISTER,
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
* and then only read by userspace code.
*/
const ssize_t ring_ofs[0];
};
2018-04-12 07:20:50 +00:00
/* Legacy interface to interact with a netmap control device.
* Included for backward compatibility. The user should not include this
* file directly. */
#include "netmap_legacy.h"
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
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* New API to control netmap control devices. New applications should only use
* nmreq_xyz structs with the NIOCCTRL ioctl() command.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
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* NIOCCTRL takes a nmreq_header struct, which contains the required
* API version, the name of a netmap port, a command type, and pointers
* to request body and options.
*
* nr_name (in)
* The name of the port (em0, valeXXX:YYY, eth0{pn1 etc.)
*
* nr_version (in/out)
* Must match NETMAP_API as used in the kernel, error otherwise.
* Always returns the desired value on output.
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
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* nr_reqtype (in)
* One of the NETMAP_REQ_* command types below
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
2018-04-12 07:20:50 +00:00
* nr_body (in)
* Pointer to a command-specific struct, described by one
* of the struct nmreq_xyz below.
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
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* nr_options (in)
* Command specific options, if any.
*
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* A NETMAP_REQ_REGISTER command activates netmap mode on the netmap
* port (e.g. physical interface) specified by nmreq_header.nr_name.
* The request body (struct nmreq_register) has several arguments to
* specify how the port is to be registered.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*
* nr_tx_slots, nr_tx_slots, nr_tx_rings, nr_rx_rings,
* nr_host_tx_rings, nr_host_rx_rings (in/out)
2018-04-12 07:20:50 +00:00
* On input, non-zero values may be used to reconfigure the port
* according to the requested values, but this is not guaranteed.
* On output the actual values in use are reported.
*
2018-04-12 07:20:50 +00:00
* nr_mode (in)
* Indicate what set of rings must be bound to the netmap
* device (e.g. all NIC rings, host rings only, NIC and
* host rings, ...). Values are in NR_REG_*.
*
2018-04-12 07:20:50 +00:00
* nr_ringid (in)
* If nr_mode == NR_REG_ONE_NIC (only a single couple of TX/RX
* rings), indicate which NIC TX and/or RX ring is to be bound
* (0..nr_*x_rings-1).
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
*
2018-04-12 07:20:50 +00:00
* nr_flags (in)
* Indicate special options for how to open the port.
Update to the current version of netmap. Mostly bugfixes or features developed in the past 6 months, so this is a 10.1 candidate. Basically no user API changes (some bugfixes in sys/net/netmap_user.h). In detail: 1. netmap support for virtio-net, including in netmap mode. Under bhyve and with a netmap backend [2] we reach over 1Mpps with standard APIs (e.g. libpcap), and 5-8 Mpps in netmap mode. 2. (kernel) add support for multiple memory allocators, so we can better partition physical and virtual interfaces giving access to separate users. The most visible effect is one additional argument to the various kernel functions to compute buffer addresses. All netmap-supported drivers are affected, but changes are mechanical and trivial 3. (kernel) simplify the prototype for *txsync() and *rxsync() driver methods. All netmap drivers affected, changes mostly mechanical. 4. add support for netmap-monitor ports. Think of it as a mirroring port on a physical switch: a netmap monitor port replicates traffic present on the main port. Restrictions apply. Drive carefully. 5. if_lem.c: support for various paravirtualization features, experimental and disabled by default. Most of these are described in our ANCS'13 paper [1]. Paravirtualized support in netmap mode is new, and beats the numbers in the paper by a large factor (under qemu-kvm, we measured gues-host throughput up to 10-12 Mpps). A lot of refactoring and additional documentation in the files in sys/dev/netmap, but apart from #2 and #3 above, almost nothing of this stuff is visible to other kernel parts. Example programs in tools/tools/netmap have been updated with bugfixes and to support more of the existing features. This is meant to go into 10.1 so we plan an MFC before the Aug.22 deadline. A lot of this code has been contributed by my colleagues at UNIPI, including Giuseppe Lettieri, Vincenzo Maffione, Stefano Garzarella. MFC after: 3 days.
2014-08-16 15:00:01 +00:00
*
2018-04-12 07:20:50 +00:00
* NR_NO_TX_POLL can be OR-ed to make select()/poll() push
* packets on tx rings only if POLLOUT is set.
* The default is to push any pending packet.
Update to the current version of netmap. Mostly bugfixes or features developed in the past 6 months, so this is a 10.1 candidate. Basically no user API changes (some bugfixes in sys/net/netmap_user.h). In detail: 1. netmap support for virtio-net, including in netmap mode. Under bhyve and with a netmap backend [2] we reach over 1Mpps with standard APIs (e.g. libpcap), and 5-8 Mpps in netmap mode. 2. (kernel) add support for multiple memory allocators, so we can better partition physical and virtual interfaces giving access to separate users. The most visible effect is one additional argument to the various kernel functions to compute buffer addresses. All netmap-supported drivers are affected, but changes are mechanical and trivial 3. (kernel) simplify the prototype for *txsync() and *rxsync() driver methods. All netmap drivers affected, changes mostly mechanical. 4. add support for netmap-monitor ports. Think of it as a mirroring port on a physical switch: a netmap monitor port replicates traffic present on the main port. Restrictions apply. Drive carefully. 5. if_lem.c: support for various paravirtualization features, experimental and disabled by default. Most of these are described in our ANCS'13 paper [1]. Paravirtualized support in netmap mode is new, and beats the numbers in the paper by a large factor (under qemu-kvm, we measured gues-host throughput up to 10-12 Mpps). A lot of refactoring and additional documentation in the files in sys/dev/netmap, but apart from #2 and #3 above, almost nothing of this stuff is visible to other kernel parts. Example programs in tools/tools/netmap have been updated with bugfixes and to support more of the existing features. This is meant to go into 10.1 so we plan an MFC before the Aug.22 deadline. A lot of this code has been contributed by my colleagues at UNIPI, including Giuseppe Lettieri, Vincenzo Maffione, Stefano Garzarella. MFC after: 3 days.
2014-08-16 15:00:01 +00:00
*
2018-04-12 07:20:50 +00:00
* NR_DO_RX_POLL can be OR-ed to make select()/poll() release
* packets on rx rings also when POLLIN is NOT set.
* The default is to touch the rx ring only with POLLIN.
* Note that this is the opposite of TX because it
* reflects the common usage.
*
* Other options are NR_MONITOR_TX, NR_MONITOR_RX, NR_ZCOPY_MON,
* NR_EXCLUSIVE, NR_RX_RINGS_ONLY, NR_TX_RINGS_ONLY and
* NR_ACCEPT_VNET_HDR.
*
* nr_mem_id (in/out)
* The identity of the memory region used.
* On input, 0 means the system decides autonomously,
* other values may try to select a specific region.
* On return the actual value is reported.
* Region '1' is the global allocator, normally shared
* by all interfaces. Other values are private regions.
* If two ports the same region zero-copy is possible.
*
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* nr_extra_bufs (in/out)
* Number of extra buffers to be allocated.
*
2018-04-12 07:20:50 +00:00
* The other NETMAP_REQ_* commands are described below.
*
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
2018-04-12 07:20:50 +00:00
/* maximum size of a request, including all options */
#define NETMAP_REQ_MAXSIZE 4096
/* Header common to all request options. */
struct nmreq_option {
/* Pointer to the next option. */
2018-04-12 07:20:50 +00:00
uint64_t nro_next;
/* Option type. */
uint32_t nro_reqtype;
/* (out) status of the option:
* 0: recognized and processed
* !=0: errno value
*/
uint32_t nro_status;
/* Option size, used only for options that can have variable size
* (e.g. because they contain arrays). For fixed-size options this
* field should be set to zero. */
uint64_t nro_size;
2018-04-12 07:20:50 +00:00
};
/* Header common to all requests. Do not reorder these fields, as we need
* the second one (nr_reqtype) to know how much to copy from/to userspace. */
struct nmreq_header {
uint16_t nr_version; /* API version */
uint16_t nr_reqtype; /* nmreq type (NETMAP_REQ_*) */
uint32_t nr_reserved; /* must be zero */
#define NETMAP_REQ_IFNAMSIZ 64
char nr_name[NETMAP_REQ_IFNAMSIZ]; /* port name */
uint64_t nr_options; /* command-specific options */
uint64_t nr_body; /* ptr to nmreq_xyz struct */
};
enum {
/* Register a netmap port with the device. */
NETMAP_REQ_REGISTER = 1,
/* Get information from a netmap port. */
NETMAP_REQ_PORT_INFO_GET,
/* Attach a netmap port to a VALE switch. */
NETMAP_REQ_VALE_ATTACH,
/* Detach a netmap port from a VALE switch. */
NETMAP_REQ_VALE_DETACH,
/* List the ports attached to a VALE switch. */
NETMAP_REQ_VALE_LIST,
/* Set the port header length (was virtio-net header length). */
NETMAP_REQ_PORT_HDR_SET,
/* Get the port header length (was virtio-net header length). */
NETMAP_REQ_PORT_HDR_GET,
/* Create a new persistent VALE port. */
NETMAP_REQ_VALE_NEWIF,
/* Delete a persistent VALE port. */
NETMAP_REQ_VALE_DELIF,
/* Enable polling kernel thread(s) on an attached VALE port. */
NETMAP_REQ_VALE_POLLING_ENABLE,
/* Disable polling kernel thread(s) on an attached VALE port. */
NETMAP_REQ_VALE_POLLING_DISABLE,
/* Get info about the pools of a memory allocator. */
NETMAP_REQ_POOLS_INFO_GET,
/* Start an in-kernel loop that syncs the rings periodically or
* on notifications. The loop runs in the context of the ioctl
* syscall, and only stops on NETMAP_REQ_SYNC_KLOOP_STOP. */
NETMAP_REQ_SYNC_KLOOP_START,
/* Stops the thread executing the in-kernel loop. The thread
* returns from the ioctl syscall. */
NETMAP_REQ_SYNC_KLOOP_STOP,
/* Enable CSB mode on a registered netmap control device. */
NETMAP_REQ_CSB_ENABLE,
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};
enum {
/* On NETMAP_REQ_REGISTER, ask netmap to use memory allocated
* from user-space allocated memory pools (e.g. hugepages).
*/
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NETMAP_REQ_OPT_EXTMEM = 1,
/* ON NETMAP_REQ_SYNC_KLOOP_START, ask netmap to use eventfd-based
* notifications to synchronize the kernel loop with the application.
*/
NETMAP_REQ_OPT_SYNC_KLOOP_EVENTFDS,
/* On NETMAP_REQ_REGISTER, ask netmap to work in CSB mode, where
* head, cur and tail pointers are not exchanged through the
* struct netmap_ring header, but rather using an user-provided
* memory area (see struct nm_csb_atok and struct nm_csb_ktoa).
*/
NETMAP_REQ_OPT_CSB,
/* An extension to NETMAP_REQ_OPT_SYNC_KLOOP_EVENTFDS, which specifies
* if the TX and/or RX rings are synced in the context of the VM exit.
* This requires the 'ioeventfd' fields to be valid (cannot be < 0).
*/
NETMAP_REQ_OPT_SYNC_KLOOP_MODE,
/* On NETMAP_REQ_REGISTER, ask for (part of) the ptr field in the
* slots of the registered rings to be used as an offset field
* for the start of the packets inside the netmap buffer.
*/
NETMAP_REQ_OPT_OFFSETS,
/* This is a marker to count the number of available options.
* New options must be added above it. */
NETMAP_REQ_OPT_MAX,
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};
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
/*
2018-04-12 07:20:50 +00:00
* nr_reqtype: NETMAP_REQ_REGISTER
* Bind (register) a netmap port to this control device.
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
*/
2018-04-12 07:20:50 +00:00
struct nmreq_register {
uint64_t nr_offset; /* nifp offset in the shared region */
uint64_t nr_memsize; /* size of the shared region */
uint32_t nr_tx_slots; /* slots in tx rings */
uint32_t nr_rx_slots; /* slots in rx rings */
uint16_t nr_tx_rings; /* number of tx rings */
uint16_t nr_rx_rings; /* number of rx rings */
uint16_t nr_host_tx_rings; /* number of host tx rings */
uint16_t nr_host_rx_rings; /* number of host rx rings */
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
2018-04-12 07:20:50 +00:00
uint16_t nr_mem_id; /* id of the memory allocator */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
uint16_t nr_ringid; /* ring(s) we care about */
2018-04-12 07:20:50 +00:00
uint32_t nr_mode; /* specify NR_REG_* modes */
uint32_t nr_extra_bufs; /* number of requested extra buffers */
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
2018-04-12 07:20:50 +00:00
uint64_t nr_flags; /* additional flags (see below) */
/* monitors use nr_ringid and nr_mode to select the rings to monitor */
This new version of netmap brings you the following: - 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
2014-02-15 04:53:04 +00:00
#define NR_MONITOR_TX 0x100
#define NR_MONITOR_RX 0x200
2015-07-10 05:51:36 +00:00
#define NR_ZCOPY_MON 0x400
/* request exclusive access to the selected rings */
#define NR_EXCLUSIVE 0x800
/* 0x1000 unused */
#define NR_RX_RINGS_ONLY 0x2000
#define NR_TX_RINGS_ONLY 0x4000
/* Applications set this flag if they are able to deal with virtio-net headers,
* that is send/receive frames that start with a virtio-net header.
* If not set, NETMAP_REQ_REGISTER will fail with netmap ports that require
* applications to use those headers. If the flag is set, the application can
* use the NETMAP_VNET_HDR_GET command to figure out the header length. */
#define NR_ACCEPT_VNET_HDR 0x8000
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/* The following two have the same meaning of NETMAP_NO_TX_POLL and
* NETMAP_DO_RX_POLL. */
#define NR_DO_RX_POLL 0x10000
#define NR_NO_TX_POLL 0x20000
};
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/* Valid values for nmreq_register.nr_mode (see above). */
enum { NR_REG_DEFAULT = 0, /* backward compat, should not be used. */
NR_REG_ALL_NIC = 1,
NR_REG_SW = 2,
NR_REG_NIC_SW = 3,
NR_REG_ONE_NIC = 4,
NR_REG_PIPE_MASTER = 5, /* deprecated, use "x{y" port name syntax */
NR_REG_PIPE_SLAVE = 6, /* deprecated, use "x}y" port name syntax */
NR_REG_NULL = 7,
NR_REG_ONE_SW = 8,
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};
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/* A single ioctl number is shared by all the new API command.
* Demultiplexing is done using the hdr.nr_reqtype field.
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* FreeBSD uses the size value embedded in the _IOWR to determine
* how much to copy in/out, so we define the ioctl() command
* specifying only nmreq_header, and copyin/copyout the rest. */
#define NIOCCTRL _IOWR('i', 151, struct nmreq_header)
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/* The ioctl commands to sync TX/RX netmap rings.
* NIOCTXSYNC, NIOCRXSYNC synchronize tx or rx queues,
* whose identity is set in NETMAP_REQ_REGISTER through nr_ringid.
2018-04-12 07:20:50 +00:00
* These are non blocking and take no argument. */
#define NIOCTXSYNC _IO('i', 148) /* sync tx queues */
#define NIOCRXSYNC _IO('i', 149) /* sync rx queues */
2018-04-12 07:20:50 +00:00
/*
* nr_reqtype: NETMAP_REQ_PORT_INFO_GET
* Get information about a netmap port, including number of rings.
* slots per ring, id of the memory allocator, etc. The netmap
* control device used for this operation does not need to be bound
* to a netmap port.
2018-04-12 07:20:50 +00:00
*/
struct nmreq_port_info_get {
uint64_t nr_memsize; /* size of the shared region */
uint32_t nr_tx_slots; /* slots in tx rings */
uint32_t nr_rx_slots; /* slots in rx rings */
uint16_t nr_tx_rings; /* number of tx rings */
uint16_t nr_rx_rings; /* number of rx rings */
uint16_t nr_host_tx_rings; /* number of host tx rings */
uint16_t nr_host_rx_rings; /* number of host rx rings */
uint16_t nr_mem_id; /* memory allocator id (in/out) */
uint16_t pad[3];
2018-04-12 07:20:50 +00:00
};
2018-04-12 07:20:50 +00:00
#define NM_BDG_NAME "vale" /* prefix for bridge port name */
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
2018-04-12 07:20:50 +00:00
/*
* nr_reqtype: NETMAP_REQ_VALE_ATTACH
* Attach a netmap port to a VALE switch. Both the name of the netmap
* port and the VALE switch are specified through the nr_name argument.
* The attach operation could need to register a port, so at least
* the same arguments are available.
* port_index will contain the index where the port has been attached.
*/
struct nmreq_vale_attach {
struct nmreq_register reg;
uint32_t port_index;
uint32_t pad1;
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};
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/*
* nr_reqtype: NETMAP_REQ_VALE_DETACH
* Detach a netmap port from a VALE switch. Both the name of the netmap
* port and the VALE switch are specified through the nr_name argument.
* port_index will contain the index where the port was attached.
*/
struct nmreq_vale_detach {
uint32_t port_index;
uint32_t pad1;
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};
2018-04-12 07:20:50 +00:00
/*
* nr_reqtype: NETMAP_REQ_VALE_LIST
* List the ports of a VALE switch.
*/
struct nmreq_vale_list {
/* Name of the VALE port (valeXXX:YYY) or empty. */
uint16_t nr_bridge_idx;
uint16_t pad1;
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uint32_t nr_port_idx;
};
/*
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* nr_reqtype: NETMAP_REQ_PORT_HDR_SET or NETMAP_REQ_PORT_HDR_GET
* Set or get the port header length of the port identified by hdr.nr_name.
* The control device does not need to be bound to a netmap port.
*/
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struct nmreq_port_hdr {
uint32_t nr_hdr_len;
uint32_t pad1;
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};
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
2018-04-12 07:20:50 +00:00
/*
* nr_reqtype: NETMAP_REQ_VALE_NEWIF
* Create a new persistent VALE port.
*/
struct nmreq_vale_newif {
uint32_t nr_tx_slots; /* slots in tx rings */
uint32_t nr_rx_slots; /* slots in rx rings */
uint16_t nr_tx_rings; /* number of tx rings */
uint16_t nr_rx_rings; /* number of rx rings */
uint16_t nr_mem_id; /* id of the memory allocator */
uint16_t pad1;
2018-04-12 07:20:50 +00:00
};
/*
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* nr_reqtype: NETMAP_REQ_VALE_POLLING_ENABLE or NETMAP_REQ_VALE_POLLING_DISABLE
* Enable or disable polling kthreads on a VALE port.
*/
2018-04-12 07:20:50 +00:00
struct nmreq_vale_polling {
uint32_t nr_mode;
#define NETMAP_POLLING_MODE_SINGLE_CPU 1
#define NETMAP_POLLING_MODE_MULTI_CPU 2
uint32_t nr_first_cpu_id;
uint32_t nr_num_polling_cpus;
uint32_t pad1;
2018-04-12 07:20:50 +00:00
};
/*
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* nr_reqtype: NETMAP_REQ_POOLS_INFO_GET
* Get info about the pools of the memory allocator of the netmap
* port specified by hdr.nr_name and nr_mem_id. The netmap control
* device used for this operation does not need to be bound to a netmap
* port.
*/
2018-04-12 07:20:50 +00:00
struct nmreq_pools_info {
uint64_t nr_memsize;
uint16_t nr_mem_id; /* in/out argument */
uint16_t pad1[3];
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uint64_t nr_if_pool_offset;
uint32_t nr_if_pool_objtotal;
uint32_t nr_if_pool_objsize;
uint64_t nr_ring_pool_offset;
uint32_t nr_ring_pool_objtotal;
uint32_t nr_ring_pool_objsize;
uint64_t nr_buf_pool_offset;
uint32_t nr_buf_pool_objtotal;
uint32_t nr_buf_pool_objsize;
};
/*
* nr_reqtype: NETMAP_REQ_SYNC_KLOOP_START
* Start an in-kernel loop that syncs the rings periodically or on
* notifications. The loop runs in the context of the ioctl syscall,
* and only stops on NETMAP_REQ_SYNC_KLOOP_STOP.
* The registered netmap port must be open in CSB mode.
*/
struct nmreq_sync_kloop_start {
/* Sleeping is the default synchronization method for the kloop.
* The 'sleep_us' field specifies how many microseconds to sleep for
* when there is no work to do, before doing another kloop iteration.
*/
uint32_t sleep_us;
uint32_t pad1;
};
/* A CSB entry for the application --> kernel direction. */
struct nm_csb_atok {
uint32_t head; /* AW+ KR+ the head of the appl netmap_ring */
uint32_t cur; /* AW+ KR+ the cur of the appl netmap_ring */
uint32_t appl_need_kick; /* AW+ KR+ kern --> appl notification enable */
uint32_t sync_flags; /* AW+ KR+ the flags of the appl [tx|rx]sync() */
uint32_t pad[12]; /* pad to a 64 bytes cacheline */
};
/* A CSB entry for the application <-- kernel direction. */
struct nm_csb_ktoa {
uint32_t hwcur; /* AR+ KW+ the hwcur of the kern netmap_kring */
uint32_t hwtail; /* AR+ KW+ the hwtail of the kern netmap_kring */
uint32_t kern_need_kick; /* AR+ KW+ appl-->kern notification enable */
uint32_t pad[13];
};
#ifdef __linux__
#ifdef __KERNEL__
#define nm_stst_barrier smp_wmb
#define nm_ldld_barrier smp_rmb
#define nm_stld_barrier smp_mb
#else /* !__KERNEL__ */
static inline void nm_stst_barrier(void)
{
/* A memory barrier with release semantic has the combined
* effect of a store-store barrier and a load-store barrier,
* which is fine for us. */
__atomic_thread_fence(__ATOMIC_RELEASE);
}
static inline void nm_ldld_barrier(void)
{
/* A memory barrier with acquire semantic has the combined
* effect of a load-load barrier and a store-load barrier,
* which is fine for us. */
__atomic_thread_fence(__ATOMIC_ACQUIRE);
}
#endif /* !__KERNEL__ */
#elif defined(__FreeBSD__)
#ifdef _KERNEL
#define nm_stst_barrier atomic_thread_fence_rel
#define nm_ldld_barrier atomic_thread_fence_acq
#define nm_stld_barrier atomic_thread_fence_seq_cst
#else /* !_KERNEL */
#ifdef __cplusplus
#include <atomic>
using std::memory_order_release;
using std::memory_order_acquire;
#else /* __cplusplus */
#include <stdatomic.h>
#endif /* __cplusplus */
static inline void nm_stst_barrier(void)
{
atomic_thread_fence(memory_order_release);
}
static inline void nm_ldld_barrier(void)
{
atomic_thread_fence(memory_order_acquire);
}
#endif /* !_KERNEL */
#else /* !__linux__ && !__FreeBSD__ */
#error "OS not supported"
#endif /* !__linux__ && !__FreeBSD__ */
/* Application side of sync-kloop: Write ring pointers (cur, head) to the CSB.
* This routine is coupled with sync_kloop_kernel_read(). */
static inline void
nm_sync_kloop_appl_write(struct nm_csb_atok *atok, uint32_t cur,
uint32_t head)
{
/* Issue a first store-store barrier to make sure writes to the
* netmap ring do not overcome updates on atok->cur and atok->head. */
nm_stst_barrier();
/*
* We need to write cur and head to the CSB but we cannot do it atomically.
* There is no way we can prevent the host from reading the updated value
* of one of the two and the old value of the other. However, if we make
* sure that the host never reads a value of head more recent than the
* value of cur we are safe. We can allow the host to read a value of cur
* more recent than the value of head, since in the netmap ring cur can be
* ahead of head and cur cannot wrap around head because it must be behind
* tail. Inverting the order of writes below could instead result into the
* host to think head went ahead of cur, which would cause the sync
* prologue to fail.
*
* The following memory barrier scheme is used to make this happen:
*
* Guest Host
*
* STORE(cur) LOAD(head)
* wmb() <-----------> rmb()
* STORE(head) LOAD(cur)
*
*/
atok->cur = cur;
nm_stst_barrier();
atok->head = head;
}
/* Application side of sync-kloop: Read kring pointers (hwcur, hwtail) from
* the CSB. This routine is coupled with sync_kloop_kernel_write(). */
static inline void
nm_sync_kloop_appl_read(struct nm_csb_ktoa *ktoa, uint32_t *hwtail,
uint32_t *hwcur)
{
/*
* We place a memory barrier to make sure that the update of hwtail never
* overtakes the update of hwcur.
* (see explanation in sync_kloop_kernel_write).
*/
*hwtail = ktoa->hwtail;
nm_ldld_barrier();
*hwcur = ktoa->hwcur;
/* Make sure that loads from ktoa->hwtail and ktoa->hwcur are not delayed
* after the loads from the netmap ring. */
nm_ldld_barrier();
}
Update to the current version of netmap. Mostly bugfixes or features developed in the past 6 months, so this is a 10.1 candidate. Basically no user API changes (some bugfixes in sys/net/netmap_user.h). In detail: 1. netmap support for virtio-net, including in netmap mode. Under bhyve and with a netmap backend [2] we reach over 1Mpps with standard APIs (e.g. libpcap), and 5-8 Mpps in netmap mode. 2. (kernel) add support for multiple memory allocators, so we can better partition physical and virtual interfaces giving access to separate users. The most visible effect is one additional argument to the various kernel functions to compute buffer addresses. All netmap-supported drivers are affected, but changes are mechanical and trivial 3. (kernel) simplify the prototype for *txsync() and *rxsync() driver methods. All netmap drivers affected, changes mostly mechanical. 4. add support for netmap-monitor ports. Think of it as a mirroring port on a physical switch: a netmap monitor port replicates traffic present on the main port. Restrictions apply. Drive carefully. 5. if_lem.c: support for various paravirtualization features, experimental and disabled by default. Most of these are described in our ANCS'13 paper [1]. Paravirtualized support in netmap mode is new, and beats the numbers in the paper by a large factor (under qemu-kvm, we measured gues-host throughput up to 10-12 Mpps). A lot of refactoring and additional documentation in the files in sys/dev/netmap, but apart from #2 and #3 above, almost nothing of this stuff is visible to other kernel parts. Example programs in tools/tools/netmap have been updated with bugfixes and to support more of the existing features. This is meant to go into 10.1 so we plan an MFC before the Aug.22 deadline. A lot of this code has been contributed by my colleagues at UNIPI, including Giuseppe Lettieri, Vincenzo Maffione, Stefano Garzarella. MFC after: 3 days.
2014-08-16 15:00:01 +00:00
/*
2018-04-12 07:20:50 +00:00
* data for NETMAP_REQ_OPT_* options
Update to the current version of netmap. Mostly bugfixes or features developed in the past 6 months, so this is a 10.1 candidate. Basically no user API changes (some bugfixes in sys/net/netmap_user.h). In detail: 1. netmap support for virtio-net, including in netmap mode. Under bhyve and with a netmap backend [2] we reach over 1Mpps with standard APIs (e.g. libpcap), and 5-8 Mpps in netmap mode. 2. (kernel) add support for multiple memory allocators, so we can better partition physical and virtual interfaces giving access to separate users. The most visible effect is one additional argument to the various kernel functions to compute buffer addresses. All netmap-supported drivers are affected, but changes are mechanical and trivial 3. (kernel) simplify the prototype for *txsync() and *rxsync() driver methods. All netmap drivers affected, changes mostly mechanical. 4. add support for netmap-monitor ports. Think of it as a mirroring port on a physical switch: a netmap monitor port replicates traffic present on the main port. Restrictions apply. Drive carefully. 5. if_lem.c: support for various paravirtualization features, experimental and disabled by default. Most of these are described in our ANCS'13 paper [1]. Paravirtualized support in netmap mode is new, and beats the numbers in the paper by a large factor (under qemu-kvm, we measured gues-host throughput up to 10-12 Mpps). A lot of refactoring and additional documentation in the files in sys/dev/netmap, but apart from #2 and #3 above, almost nothing of this stuff is visible to other kernel parts. Example programs in tools/tools/netmap have been updated with bugfixes and to support more of the existing features. This is meant to go into 10.1 so we plan an MFC before the Aug.22 deadline. A lot of this code has been contributed by my colleagues at UNIPI, including Giuseppe Lettieri, Vincenzo Maffione, Stefano Garzarella. MFC after: 3 days.
2014-08-16 15:00:01 +00:00
*/
2018-04-12 07:20:50 +00:00
struct nmreq_opt_sync_kloop_eventfds {
struct nmreq_option nro_opt; /* common header */
/* An array of N entries for bidirectional notifications between
* the kernel loop and the application. The number of entries and
* their order must agree with the CSB arrays passed in the
* NETMAP_REQ_OPT_CSB option. Each entry contains a file descriptor
* backed by an eventfd.
*
* If any of the 'ioeventfd' entries is < 0, the event loop uses
* the sleeping synchronization strategy (according to sleep_us),
* and keeps kern_need_kick always disabled.
* Each 'irqfd' can be < 0, and in that case the corresponding queue
* is never notified.
*/
struct {
/* Notifier for the application --> kernel loop direction. */
int32_t ioeventfd;
/* Notifier for the kernel loop --> application direction. */
int32_t irqfd;
} eventfds[0];
};
struct nmreq_opt_sync_kloop_mode {
struct nmreq_option nro_opt; /* common header */
#define NM_OPT_SYNC_KLOOP_DIRECT_TX (1 << 0)
#define NM_OPT_SYNC_KLOOP_DIRECT_RX (1 << 1)
uint32_t mode;
};
2018-04-12 07:20:50 +00:00
struct nmreq_opt_extmem {
struct nmreq_option nro_opt; /* common header */
uint64_t nro_usrptr; /* (in) ptr to usr memory */
struct nmreq_pools_info nro_info; /* (in/out) */
Update to the current version of netmap. Mostly bugfixes or features developed in the past 6 months, so this is a 10.1 candidate. Basically no user API changes (some bugfixes in sys/net/netmap_user.h). In detail: 1. netmap support for virtio-net, including in netmap mode. Under bhyve and with a netmap backend [2] we reach over 1Mpps with standard APIs (e.g. libpcap), and 5-8 Mpps in netmap mode. 2. (kernel) add support for multiple memory allocators, so we can better partition physical and virtual interfaces giving access to separate users. The most visible effect is one additional argument to the various kernel functions to compute buffer addresses. All netmap-supported drivers are affected, but changes are mechanical and trivial 3. (kernel) simplify the prototype for *txsync() and *rxsync() driver methods. All netmap drivers affected, changes mostly mechanical. 4. add support for netmap-monitor ports. Think of it as a mirroring port on a physical switch: a netmap monitor port replicates traffic present on the main port. Restrictions apply. Drive carefully. 5. if_lem.c: support for various paravirtualization features, experimental and disabled by default. Most of these are described in our ANCS'13 paper [1]. Paravirtualized support in netmap mode is new, and beats the numbers in the paper by a large factor (under qemu-kvm, we measured gues-host throughput up to 10-12 Mpps). A lot of refactoring and additional documentation in the files in sys/dev/netmap, but apart from #2 and #3 above, almost nothing of this stuff is visible to other kernel parts. Example programs in tools/tools/netmap have been updated with bugfixes and to support more of the existing features. This is meant to go into 10.1 so we plan an MFC before the Aug.22 deadline. A lot of this code has been contributed by my colleagues at UNIPI, including Giuseppe Lettieri, Vincenzo Maffione, Stefano Garzarella. MFC after: 3 days.
2014-08-16 15:00:01 +00:00
};
struct nmreq_opt_csb {
struct nmreq_option nro_opt;
/* Array of CSB entries for application --> kernel communication
* (N entries). */
uint64_t csb_atok;
/* Array of CSB entries for kernel --> application communication
* (N entries). */
uint64_t csb_ktoa;
};
/* option NETMAP_REQ_OPT_OFFSETS */
struct nmreq_opt_offsets {
struct nmreq_option nro_opt;
/* the user must declare the maximum offset value that she is
* going to put into the offset slot-fields. Any larger value
* found at runtime will be cropped. On output the (possibly
* higher) effective max value is returned.
*/
uint64_t nro_max_offset;
/* optional initial offset value, to be set in all slots. */
uint64_t nro_initial_offset;
/* number of bits in the lower part of the 'ptr' field to be
* used as the offset field. On output the (possibly larger)
* effective number of bits is returned.
* 0 means: use the whole ptr field.
*/
uint32_t nro_offset_bits;
/* required alignment for the beginning of the packets
* (base of the buffer plus offset) in the TX slots.
*/
uint32_t nro_tx_align;
/* Reserved: set to zero. */
uint64_t nro_min_gap;
};
Bring in support for netmap, a framework for very efficient packet 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.
2011-11-17 12:17:39 +00:00
#endif /* _NET_NETMAP_H_ */