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cdea31e305
freebsd-dev/sys/net
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Luigi Rizzo 506cc70cce 1. Fix the handling of link reset while in netmap more. 
A link reset now is completely transparent for the netmap client:
   even if the NIC resets its own ring (e.g. restarting from 0),
   the client will not see any change in the current rx/tx positions,
   because the driver will keep track of the offset between the two.

2. make the device-specific code more uniform across different drivers
   There were some inconsistencies in the implementation of the netmap
   support routines, now drivers have been aligned to a common
   code structure.

3. import netmap support for ixgbe . This is implemented as a very
   small patch for ixgbe.c (233 lines, 11 chunks, mostly comments:
   in total the patch has only 54 lines of new code) , as most of
   the code is in an external file sys/dev/netmap/ixgbe_netmap.h ,
   following some initial comments from Jack Vogel about making
   changes less intrusive.
   (Note, i have emailed Jack multiple times asking if he had
   comments on this structure of the code; i got no reply so
   i assume he is fine with it).

Support for other drivers (em, lem, re, igb) will come later.

"ixgbe" is now the reference driver for netmap support. Both the
external file (sys/dev/netmap/ixgbe_netmap.h) and the device-specific
patches (in sys/dev/ixgbe/ixgbe.c) are heavily commented and should
serve as a reference for other device drivers.

Tested on i386 and amd64 with the pkt-gen program in tools/tools/netmap,
the sender does 14.88 Mpps at 1050 Mhz and 14.2 Mpps at 900 MHz
on an i7-860 with 4 cores and 82599 card. Haven't tried yet more
aggressive optimizations such as adding 'prefetch' instructions
in the time-critical parts of the code.
2011-12-05 12:06:53 +00:00
..
bpf_buffer.c o Swap descriptions for net.bpf.bufsize and net.bpf.maxbufsize. 2010-11-24 05:50:19 +00:00
bpf_buffer.h
bpf_filter.c Clear the filter memory area before using it. Leaving it uninitialized may 2011-07-14 21:06:22 +00:00
bpf_jitter.c
bpf_jitter.h
bpf_zerocopy.c Introduce and use a new VM interface for temporarily pinning pages. This 2010-12-25 21:26:56 +00:00
bpf_zerocopy.h
bpf.c Revert r227778 in preparation for committing reworked patches in its place. 2011-11-29 12:55:26 +00:00
bpf.h Revert r227778 in preparation for committing reworked patches in its place. 2011-11-29 12:55:26 +00:00
bpfdesc.h
bridgestp.c Set curvnet context in a callout-trigerred code path. 2011-06-07 20:46:03 +00:00
bridgestp.h Set curvnet context in a callout-trigerred code path. 2011-06-07 20:46:03 +00:00
ethernet.h
fddi.h
firewire.h
flowtable.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
flowtable.h
ieee8023ad_lacp.c
ieee8023ad_lacp.h
if_arc.h
if_arcsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_arp.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_atm.h
if_atmsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_bridge.c In r191367 the need for if_free_type() was removed and a new member 2011-11-11 22:57:52 +00:00
if_bridgevar.h
if_clone.c - Use generic alloc_unr(9) allocator for if_clone, instead 2011-11-28 14:44:59 +00:00
if_clone.h - Use generic alloc_unr(9) allocator for if_clone, instead 2011-11-28 14:44:59 +00:00
if_dead.c
if_debug.c Add infrastructure to allow all frames/packets received on an interface 2011-07-03 12:22:02 +00:00
if_disc.c
if_dl.h
if_edsc.c
if_ef.c
if_enc.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_enc.h
if_epair.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_ethersubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_faith.c
if_fddisubr.c Tag mbufs of all incoming frames or packets with the interface's FIB 2011-07-03 16:08:38 +00:00
if_fwsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_gif.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_gif.h
if_gre.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_gre.h gre(4) was using a field in the softc to detect possible recursion. 2011-06-18 09:34:03 +00:00
if_iso88025subr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_lagg.c In r191367 the need for if_free_type() was removed and a new member 2011-11-11 22:57:52 +00:00
if_lagg.h
if_llatbl.c The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
if_llatbl.h Make KBI changes required for future MFCing of inpcb rtentry / llentry caching. 2011-09-20 20:27:26 +00:00
if_llc.h
if_loop.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
if_media.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
if_media.h - Add 10baseT as an alias for 10baseT/UTP. 2011-05-15 12:58:29 +00:00
if_mib.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_mib.h
if_sppp.h
if_spppfr.c Remove a few bits of FreeBSD 2.x compatibility code. 2011-11-14 18:21:27 +00:00
if_spppsubr.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
if_stf.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_stf.h
if_tap.c In r191367 the need for if_free_type() was removed and a new member 2011-11-11 22:57:52 +00:00
if_tap.h
if_tapvar.h
if_tun.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
if_tun.h
if_types.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_var.h Add macro IF_DEQUEUE_ALL(ifq, m), that takes the entire mbuf chain off 2011-10-27 09:45:12 +00:00
if_vlan_var.h - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_vlan.c Change the if_vlan driver to use if_transmit for forwarding packets to the 2011-11-28 19:35:08 +00:00
if.c Improve logging: 2011-11-22 19:42:17 +00:00
if.h Add missing #includes. 2011-10-21 12:58:34 +00:00
iso88025.h
netisr_internal.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netisr.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
netisr.h Rework netisr policy mechanism so that per-protocol dispatch policies can 2011-05-24 12:34:19 +00:00
netmap_user.h Bring in support for netmap, a framework for very efficient packet 2011-11-17 12:17:39 +00:00
netmap.h 1. Fix the handling of link reset while in netmap more. 2011-12-05 12:06:53 +00:00
pfil.c
pfil.h
pfkeyv2.h
ppp_defs.h
radix_mpath.c When the RADIX_MPATH kernel option is enabled, the RADIX_MPATH code tries 2011-08-25 04:31:20 +00:00
radix_mpath.h
radix.c whitespace cleanup 2010-07-15 14:41:59 +00:00
radix.h Make KBI changes required for future MFCing of inpcb rtentry / llentry caching. 2011-09-20 20:27:26 +00:00
raw_cb.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
raw_cb.h Pass the fibnum where we need filtering of the message on the 2011-09-28 13:48:36 +00:00
raw_usrreq.c Pass the fibnum where we need filtering of the message on the 2011-09-28 13:48:36 +00:00
route.c The host-id/interface-id can have a specific value and is properly 2011-10-25 00:34:39 +00:00
route.h Pass the fibnum where we need filtering of the message on the 2011-09-28 13:48:36 +00:00
rtsock.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
slcompress.c
slcompress.h
vnet.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
vnet.h Mfp4 CH=177255: 2011-02-11 14:17:58 +00:00
zlib.c
zlib.h
zutil.h