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* MFC r284988, r285220, and r285221.np2015-08-041-3/+12
| | | | | | | | | | | | | | | | | r284988: cxgbe(4): request an automatic tx update when a netmap tx queue idles. The NIC tx queues already do this. r285220: cxgbe(4): Do not override the the global defaults for congestion drops. The hw.cxgbe.cong_drop knob is not affected by this change because the driver sets up congestion drop on a per-queue basis. r285221: cxgbe(4): Add a new knob that controls the congestion response of netmap rx queues. The default is to drop rather than backpressure. This decouples the congestion settings of NIC and netmap rx queues.
* MFC r283858 and r284007.np2015-06-061-1/+1
| | | | | | | | | r283858: cxgbe: set minimum burst size when fetching freelist buffers to 128B. r284007: cxgbe: set the minimum burst size when fetching fl buffers to 128B for netmap rx queues too. This should have gone in as part of r283858.
* MFC r279243-r279246, r279251, r279691, r279700, and r279701.np2015-04-081-32/+124
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | r279243: cxgbe(4): request an automatic tx update when a netmap txq idles. r279244: cxgbe(4): wait for the hardware to catch up before destroying a netmap txq. r279245: cxgbe(4): do not set the netmap rxq interrupts on a hair-trigger. r279246: cxgbe(4): set up congestion management for netmap rx queues. The hw.cxgbe.cong_drop knob controls the response of the chip when netmap queues are congested. r279251: cxgbe(4): allow tx hardware checksumming on the netmap interface. It is disabled by default but users can set IFCAP_TXCSUM on the netmap ifnet (ifconfig ncxl0 txcsum) to override netmap and force the hardware to calculate and insert proper IP and L4 checksums in outbound frames. r279691: cxgbe(4): provide the correct size of freelists associated with netmap rx queues to the chip. This will fix many problems with native netmap rx on ncxl/ncxgbe interfaces. r279700: cxgbe(4): knobs to experiment with the interrupt coalescing timer for netmap rx queues, and the "batchiness" of rx updates sent to the chip. These knobs will probably become per-rxq in the near future and will be documented only after their final form is decided. r279701: cxgbe(4): experimental rx packet sink for netmap queues. This is not intended for general use.
* MFC r271328:np2014-11-121-1/+1
| | | | Whitespace nit.
* MFC r266571, r266757, r268536, r269076, r269364, r269366, r269411,np2014-08-211-0/+1138
r269413, r269428, r269440, r269537, r269644, r269731, and the cxgbe portion of r270063. r266571: cxgbe(4): Remove stray if_up from the code that creates the tracing ifnet. r266757: cxgbe(4): netmap support for Terminator 5 (T5) based 10G/40G cards. Netmap gets its own hardware-assisted virtual interface and won't take over or disrupt the "normal" interface in any way. You can use both simultaneously. For kernels with DEV_NETMAP, cxgbe(4) carves out an ncxl<N> interface (note the 'n' prefix) in the hardware to accompany each cxl<N> interface. These two ifnet's per port share the same wire but really are separate interfaces in the hardware and software. Each gets its own L2 MAC addresses (unicast and multicast), MTU, checksum caps, etc. You should run netmap on the 'n' interfaces only, that's what they are for. With this, pkt-gen is able to transmit > 45Mpps out of a single 40G port of a T580 card. 2 port tx is at ~56Mpps total (28M + 28M) as of now. Single port receive is at 33Mpps but this is very much a work in progress. I expect it to be closer to 40Mpps once done. In any case the current effort can already saturate multiple 10G ports of a T5 card at the smallest legal packet size. T4 gear is totally untested. trantor:~# ./pkt-gen -i ncxl0 -f tx -D 00:07:43:ab:cd:ef 881.952141 main [1621] interface is ncxl0 881.952250 extract_ip_range [275] range is 10.0.0.1:0 to 10.0.0.1:0 881.952253 extract_ip_range [275] range is 10.1.0.1:0 to 10.1.0.1:0 881.962540 main [1804] mapped 334980KB at 0x801dff000 Sending on netmap:ncxl0: 4 queues, 1 threads and 1 cpus. 10.0.0.1 -> 10.1.0.1 (00:00:00:00:00:00 -> 00:07:43:ab:cd:ef) 881.962562 main [1882] Sending 512 packets every 0.000000000 s 881.962563 main [1884] Wait 2 secs for phy reset 884.088516 main [1886] Ready... 884.088535 nm_open [457] overriding ifname ncxl0 ringid 0x0 flags 0x1 884.088607 sender_body [996] start 884.093246 sender_body [1064] drop copy 885.090435 main_thread [1418] 45206353 pps (45289533 pkts in 1001840 usec) 886.091600 main_thread [1418] 45322792 pps (45375593 pkts in 1001165 usec) 887.092435 main_thread [1418] 45313992 pps (45351784 pkts in 1000834 usec) 888.094434 main_thread [1418] 45315765 pps (45406397 pkts in 1002000 usec) 889.095434 main_thread [1418] 45333218 pps (45378551 pkts in 1001000 usec) 890.097434 main_thread [1418] 45315247 pps (45405877 pkts in 1002000 usec) 891.099434 main_thread [1418] 45326515 pps (45417168 pkts in 1002000 usec) 892.101434 main_thread [1418] 45333039 pps (45423705 pkts in 1002000 usec) 893.103434 main_thread [1418] 45324105 pps (45414708 pkts in 1001999 usec) 894.105434 main_thread [1418] 45318042 pps (45408723 pkts in 1002001 usec) 895.106434 main_thread [1418] 45332430 pps (45377762 pkts in 1001000 usec) 896.107434 main_thread [1418] 45338072 pps (45383410 pkts in 1001000 usec) ... r268536: cxgbe(4): Add an iSCSI softc to the adapter structure. r269076: Some hooks in cxgbe(4) for the offloaded iSCSI driver. r269364: Improve compliance with style.Makefile(5). r269366: List one file per line in the Makefiles. This makes it easier to read diffs when a file is added or removed. r269411: cxgbe(4): minor optimizations in ingress queue processing. Reorganize struct sge_iq. Make the iq entry size a compile time constant. While here, eliminate RX_FL_ESIZE and use EQ_ESIZE directly. r269413: cxgbe(4): Fix an off by one error when looking for the BAR2 doorbell address of an egress queue. r269428: cxgbe(4): some optimizations in freelist handling. r269440: cxgbe(4): Remove an unused version of t4_enable_vi. r269537: cxgbe(4): Do not run any sleepable code in the SIOCSIFFLAGS handler when IFF_PROMISC or IFF_ALLMULTI is being flipped. bpf(4) holds its global mutex around ifpromisc in at least the bpf_dtor path. r269644: cxgbe(4): Let caller specify whether it's ok to sleep in t4_sched_config and t4_sched_params. r269731: cxgbe(4): Do not poke T4-only registers on a T5 (and vice versa). Relnotes: Yes (native netmap support for Chelsio T4/T5 cards)
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