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685dc743 |
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16-Aug-2023 |
Warner Losh <imp@FreeBSD.org> |
sys: Remove $FreeBSD$: one-line .c pattern Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
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4d846d26 |
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10-May-2023 |
Warner Losh <imp@FreeBSD.org> |
spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
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954712e8 |
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30-May-2022 |
Justin Hibbits <jhibbits@FreeBSD.org> |
Mechanically convert cxgb(4) and cxgbe(4) to IfAPI Reviewed by: np Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D38597
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bddf7343 |
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21-Nov-2019 |
John Baldwin <jhb@FreeBSD.org> |
NIC KTLS for Chelsio T6 adapters. This adds support for ifnet (NIC) KTLS using Chelsio T6 adapters. Unlike the TOE-based KTLS in r353328, NIC TLS works with non-TOE connections. NIC KTLS on T6 is not able to use the normal TSO (LSO) path to segment the encrypted TLS frames output by the crypto engine. Instead, the TOE is placed into a special setup to permit "dummy" connections to be associated with regular sockets using KTLS. This permits using the TOE to segment the encrypted TLS records. However, this approach does have some limitations: 1) Regular TOE sockets cannot be used when the TOE is in this special mode. One can use either TOE and TOE-based KTLS or NIC KTLS, but not both at the same time. 2) In NIC KTLS mode, the TOE is only able to accept a per-connection timestamp offset that varies in the upper 4 bits. Put another way, only connections whose timestamp offset has the 28 lower bits cleared can use NIC KTLS and generate correct timestamps. The driver will refuse to enable NIC KTLS on connections with a timestamp offset with any of the lower 28 bits set. To use NIC KTLS, users can either disable TCP timestamps by setting the net.inet.tcp.rfc1323 sysctl to 0, or apply a local patch to the tcp_new_ts_offset() function to clear the lower 28 bits of the generated offset. 3) Because the TCP segmentation relies on fields mirrored in a TCB in the TOE, not all fields in a TCP packet can be sent in the TCP segments generated from a TLS record. Specifically, for packets containing TCP options other than timestamps, the driver will inject an "empty" TCP packet holding the requested options (e.g. a SACK scoreboard) along with the segments from the TLS record. These empty TCP packets are counted by the dev.cc.N.txq.M.kern_tls_options sysctls. Unlike TOE TLS which is able to buffer encrypted TLS records in on-card memory to handle retransmits, NIC KTLS must re-encrypt TLS records for retransmit requests as well as non-retransmit requests that do not include the start of a TLS record but do include the trailer. The T6 NIC KTLS code tries to optimize some of the cases for requests to transmit partial TLS records. In particular it attempts to minimize sending "waste" bytes that have to be given as input to the crypto engine but are not needed on the wire to satisfy mbufs sent from the TCP stack down to the driver. TCP packets for TLS requests are broken down into the following classes (with associated counters): - Mbufs that send an entire TLS record in full do not have any waste bytes (dev.cc.N.txq.M.kern_tls_full). - Mbufs that send a short TLS record that ends before the end of the trailer (dev.cc.N.txq.M.kern_tls_short). For sockets using AES-CBC, the encryption must always start at the beginning, so if the mbuf starts at an offset into the TLS record, the offset bytes will be "waste" bytes. For sockets using AES-GCM, the encryption can start at the 16 byte block before the starting offset capping the waste at 15 bytes. - Mbufs that send a partial TLS record that has a non-zero starting offset but ends at the end of the trailer (dev.cc.N.txq.M.kern_tls_partial). In order to compute the authentication hash stored in the trailer, the entire TLS record must be sent as input to the crypto engine, so the bytes before the offset are always "waste" bytes. In addition, other per-txq sysctls are provided: - dev.cc.N.txq.M.kern_tls_cbc: Count of sockets sent via this txq using AES-CBC. - dev.cc.N.txq.M.kern_tls_gcm: Count of sockets sent via this txq using AES-GCM. - dev.cc.N.txq.M.kern_tls_fin: Count of empty FIN-only packets sent to compensate for the TOE engine not being able to set FIN on the last segment of a TLS record if the TLS record mbuf had FIN set. - dev.cc.N.txq.M.kern_tls_records: Count of TLS records sent via this txq including full, short, and partial records. - dev.cc.N.txq.M.kern_tls_octets: Count of non-waste bytes (TLS header and payload) sent for TLS record requests. - dev.cc.N.txq.M.kern_tls_waste: Count of waste bytes sent for TLS record requests. To enable NIC KTLS with T6, set the following tunables prior to loading the cxgbe(4) driver: hw.cxgbe.config_file=kern_tls hw.cxgbe.kern_tls=1 Reviewed by: np Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D21962
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061bbaf7 |
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21-Sep-2018 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Reuse existing "switching" L2T entries when possible. Approved by: re@ (rgrimes@) Sponsored by: Chelsio Communications
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37310a98 |
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11-Aug-2018 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Move all control queues to the adapter. There used to be one control queue per adapter (the mgmtq) that was initialized during adapter init and one per port that was initialized later during port init. This change moves all the control queues (one per port/channel) to the adapter so that they are initialized during adapter init and are available before any port is up. This allows the driver to issue ctrlq work requests over any channel without having to bring up any port. MFH: 2 weeks Sponsored by: Chelsio Communications
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b9330ed7 |
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31-May-2018 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Retire an old check.
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718cf2cc |
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27-Nov-2017 |
Pedro F. Giffuni <pfg@FreeBSD.org> |
sys/dev: further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
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671bf2b8 |
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04-Jul-2016 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Changes to the CPL-handler registration mechanism and code related to "shared" CPLs. a) Combine t4_set_tcb_field and t4_set_tcb_field_rpl into a single function. Allow callers to direct the response to any iq. Tidy up set_ulp_mode_iscsi while there to use names from t4_tcb.h instead of magic constants. b) Remove all CPL handler tables from struct adapter. This reduces its size by around 2KB. All handlers are now registered at MOD_LOAD instead of attach or some kind of initialization/activation. The registration functions do not need an adapter parameter any more. c) Add per-iq handlers to deal with CPLs whose destination cannot be determined solely from the opcode. There are 2 such CPLs in use right now: SET_TCB_RPL and L2T_WRITE_RPL. The base driver continues to send filter and L2T_WRITEs over the mgmtq and solicits the reply on fwq. t4_tom (including the DDP code) now uses the port's ctrlq to send L2T_WRITEs and SET_TCB_FIELDs and solicits the reply on an ofld_rxq. fwq and ofld_rxq have different handlers that know what kind of tid to expect in the reply. Update t4_write_l2e and callers to to support any wrq/iq combination. Approved by: re@ (kib@) Sponsored by: Chelsio Communications
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bf9363d7 |
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01-Jul-2016 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Avoid a NULL dereference while dumping the L2 table. Entries used by switching filters that rewrite L2 information do not have any associated ifnet. Approved by: re@ (gjb@) Sponsored by: Chelsio Communications
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453130d9 |
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02-May-2016 |
Pedro F. Giffuni <pfg@FreeBSD.org> |
sys/dev: minor spelling fixes. Most affect comments, very few have user-visible effects.
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b36424bd |
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14-Mar-2015 |
Ian Lepore <ian@FreeBSD.org> |
Revert r279934, r279938; this is going to be fixed in sbuf instead. PR: 195668
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2f01da78 |
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12-Mar-2015 |
Ian Lepore <ian@FreeBSD.org> |
Fix a paste-o, sb is already a pointer in this one.
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9bc58e3d |
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12-Mar-2015 |
Ian Lepore <ian@FreeBSD.org> |
Nullterminate strings returned via sysctl. PR: 195668
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7951040f |
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31-Dec-2014 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): major tx rework. a) Front load as much work as possible in if_transmit, before any driver lock or software queue has to get involved. b) Replace buf_ring with a brand new mp_ring (multiproducer ring). This is specifically for the tx multiqueue model where one of the if_transmit producer threads becomes the consumer and other producers carry on as usual. mp_ring is implemented as standalone code and it should be possible to use it in any driver with tx multiqueue. It also has: - the ability to enqueue/dequeue multiple items. This might become significant if packet batching is ever implemented. - an abdication mechanism to allow a thread to give up writing tx descriptors and have another if_transmit thread take over. A thread that's writing tx descriptors can end up doing so for an unbounded time period if a) there are other if_transmit threads continuously feeding the sofware queue, and b) the chip keeps up with whatever the thread is throwing at it. - accurate statistics about interesting events even when the stats come at the expense of additional branches/conditional code. The NIC txq lock is uncontested on the fast path at this point. I've left it there for synchronization with the control events (interface up/down, modload/unload). c) Add support for "type 1" coalescing work request in the normal NIC tx path. This work request is optimized for frames with a single item in the DMA gather list. These are very common when forwarding packets. Note that netmap tx in cxgbe already uses these "type 1" work requests. d) Do not request automatic cidx updates every 32 descriptors. Instead, request updates via bits in individual work requests (still every 32 descriptors approximately). Also, request an automatic final update when the queue idles after activity. This means NIC tx reclaim is still performed lazily but it will catch up quickly as soon as the queue idles. This seems to be the best middle ground and I'll probably do something similar for netmap tx as well. e) Implement a faster tx path for WRQs (used by TOE tx and control queues, _not_ by the normal NIC tx). Allow work requests to be written directly to the hardware descriptor ring if room is available. I will convert t4_tom and iw_cxgbe modules to this faster style gradually. MFC after: 2 months
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c3322cb9 |
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28-Oct-2013 |
Gleb Smirnoff <glebius@FreeBSD.org> |
Include necessary headers that now are available due to pollution via if_var.h. Sponsored by: Netflix Sponsored by: Nginx, Inc.
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0a0a697c |
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14-Jan-2013 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): Updates to the hardware L2 table management code. - Add full support for IPv6 addresses. - Read the size of the L2 table during attach. Do not assume that PCIe physical function 4 of the card has all of the table to itself. - Use FNV instead of Jenkins to hash L3 addresses and drop the private copy of jhash.h from the driver. MFC after: 1 week
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4cead976 |
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21-Dec-2012 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): must hold a write-lock on the table while allocating an L2 entry for switching. MFC after: 3 days
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a1ea9a82 |
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29-Jun-2012 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe(4): support for IPv6 TSO and LRO. Submitted by: bz (this is a modified version of that patch)
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09fe6320 |
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19-Jun-2012 |
Navdeep Parhar <np@FreeBSD.org> |
- Updated TOE support in the kernel. - Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs. These are available as t3_tom and t4_tom modules that augment cxgb(4) and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as usual with or without these extra features. - iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the works and will follow soon. Build-tested with make universe. 30s overview ============ What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the capabilities of an interface: # ifconfig -m | grep TOE Enable/disable TCP offload on an interface (just like any other ifnet capability): # ifconfig cxgbe0 toe # ifconfig cxgbe0 -toe Which connections are offloaded? Look for toe4 and/or toe6 in the output of netstat and sockstat: # netstat -np tcp | grep toe # sockstat -46c | grep toe Reviewed by: bz, gnn Sponsored by: Chelsio communications. MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)
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bfb08b6b |
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06-Feb-2012 |
Navdeep Parhar <np@FreeBSD.org> |
cxgbe: reduce diffs with other branches. Will help future MFCs from HEAD. MFC after: 3 days
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733b9277 |
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15-Dec-2011 |
Navdeep Parhar <np@FreeBSD.org> |
Many updates to cxgbe(4) - Device configuration via plain text config file. Also able to operate when not attached to the chip as the master driver. - Generic "work request" queue that serves as the base for both ctrl and ofld tx queues. - Generic interrupt handler routine that can process any event on any kind of ingress queue (via a dispatch table). - A couple of new driver ioctls. cxgbetool can now install a firmware to the card ("loadfw" command) and can read the card's memory ("memdump" and "tcb" commands). - Lots of assorted information within dev.t4nex.X.misc.* This is primarily for debugging and won't show up in sysctl -a. - Code to manage the L2 tables on the chip. - Updates to cxgbe(4) man page to go with the tunables that have changed. - Updates to the shared code in common/ - Updates to the driver-firmware interface (now at fw 1.4.16.0) MFC after: 1 month
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4dba21f1 |
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30-May-2011 |
Navdeep Parhar <np@FreeBSD.org> |
L2 table code. This is enough to get the T4's switch + L2 rewrite filters working. (All other filters - switch without L2 info rewrite, steer, and drop - were already fully-functional). Some contrived examples of "switch" filters with L2 rewriting: # cxgbetool t4nex0 iport 0 dport 80 action switch vlan +9 eport 3 Intercept all packets received on physical port 0 with TCP port 80 as destination, insert a vlan tag with VID 9, and send them out of port 3. # cxgbetool t4nex0 sip 192.168.1.1/32 ivlan 5 action switch \ vlan =9 smac aa:bb:cc:dd:ee:ff eport 0 Intercept all packets (received on any port) with source IP address 192.168.1.1 and VLAN id 5, rewrite the VLAN id to 9, rewrite source mac to aa:bb:cc:dd:ee:ff, and send it out of port 0. MFC after: 1 week
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