478428c5d9
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
279 lines
5.7 KiB
Plaintext
279 lines
5.7 KiB
Plaintext
# Firmware configuration file.
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#
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# Global limits (some are hardware limits, others are due to the firmware).
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# nvi = 128 virtual interfaces
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# niqflint = 1023 ingress queues with freelists and/or interrupts
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# nethctrl = 64K Ethernet or ctrl egress queues
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# neq = 64K egress queues of all kinds, including freelists
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# nexactf = 512 MPS TCAM entries, can oversubscribe.
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[global]
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rss_glb_config_mode = basicvirtual
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rss_glb_config_options = tnlmapen,hashtoeplitz,tnlalllkp
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# PL_TIMEOUT register
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pl_timeout_value = 200 # the timeout value in units of us
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sge_timer_value = 1, 5, 10, 50, 100, 200 # SGE_TIMER_VALUE* in usecs
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reg[0x10c4] = 0x20000000/0x20000000 # GK_CONTROL, enable 5th thread
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reg[0x7dc0] = 0x0e2f8849 # TP_SHIFT_CNT
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#Tick granularities in kbps
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tsch_ticks = 100000, 10000, 1000, 10
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filterMode = fragmentation, mpshittype, protocol, vlan, port, fcoe
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filterMask = protocol
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tp_pmrx = 10, 512
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tp_pmrx_pagesize = 64K
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# TP number of RX channels (0 = auto)
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tp_nrxch = 0
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tp_pmtx = 10, 512
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tp_pmtx_pagesize = 64K
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# TP number of TX channels (0 = auto)
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tp_ntxch = 0
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# TP OFLD MTUs
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tp_mtus = 88, 256, 512, 576, 808, 1024, 1280, 1488, 1500, 2002, 2048, 4096, 4352, 8192, 9000, 9600
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# enable TP_OUT_CONFIG.IPIDSPLITMODE and CRXPKTENC
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reg[0x7d04] = 0x00010008/0x00010008
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# TP_GLOBAL_CONFIG
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reg[0x7d08] = 0x00000800/0x00000800 # set IssFromCplEnable
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# TP_PC_CONFIG
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reg[0x7d48] = 0x00000000/0x00000400 # clear EnableFLMError
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# TP_PARA_REG0
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reg[0x7d60] = 0x06000000/0x07000000 # set InitCWND to 6
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# cluster, lan, or wan.
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tp_tcptuning = lan
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# LE_DB_CONFIG
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reg[0x19c04] = 0x00000000/0x00440000 # LE Server SRAM disabled
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# LE IPv4 compression disabled
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# LE_DB_HASH_CONFIG
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reg[0x19c28] = 0x00800000/0x01f00000 # LE Hash bucket size 8,
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# ULP_TX_CONFIG
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reg[0x8dc0] = 0x00000104/0x00000104 # Enable ITT on PI err
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# Enable more error msg for ...
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# TPT error.
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# ULP_RX_MISC_FEATURE_ENABLE
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#reg[0x1925c] = 0x01003400/0x01003400 # iscsi tag pi bit
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# Enable offset decrement after ...
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# PI extraction and before DDP
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# ulp insert pi source info in DIF
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# iscsi_eff_offset_en
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#Enable iscsi completion moderation feature
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reg[0x1925c] = 0x000041c0/0x000031c0 # Enable offset decrement after
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# PI extraction and before DDP.
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# ulp insert pi source info in
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# DIF.
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# Enable iscsi hdr cmd mode.
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# iscsi force cmd mode.
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# Enable iscsi cmp mode.
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# MC configuration
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#mc_mode_brc[0] = 1 # mc0 - 1: enable BRC, 0: enable RBC
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# PFs 0-3. These get 8 MSI/8 MSI-X vectors each. VFs are supported by
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# these 4 PFs only.
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[function "0"]
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wx_caps = all
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r_caps = all
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x1
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[function "1"]
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wx_caps = all
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r_caps = all
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x2
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[function "2"]
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wx_caps = all
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r_caps = all
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x4
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[function "3"]
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wx_caps = all
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r_caps = all
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x8
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# PF4 is the resource-rich PF that the bus/nexus driver attaches to.
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# It gets 32 MSI/128 MSI-X vectors.
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[function "4"]
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wx_caps = all
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r_caps = all
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nvi = 32
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rssnvi = 32
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niqflint = 512
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nethctrl = 1024
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neq = 2048
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nqpcq = 8192
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nexactf = 456
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cmask = all
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pmask = all
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ncrypto_lookaside = 16
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nclip = 320
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nethofld = 8192
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# TCAM has 6K cells; each region must start at a multiple of 128 cell.
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# Each entry in these categories takes 2 cells each. nhash will use the
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# TCAM iff there is room left (that is, the rest don't add up to 3072).
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nfilter = 48
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nserver = 64
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nhpfilter = 0
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nhash = 524288
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protocol = ofld, tlskeys, crypto_lookaside
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tp_l2t = 4096
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tp_ddp = 2
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tp_ddp_iscsi = 2
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tp_tls_key = 3
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tp_tls_mxrxsize = 17408 # 16384 + 1024, governs max rx data, pm max xfer len, rx coalesce sizes
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tp_stag = 2
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tp_pbl = 5
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tp_rq = 7
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tp_srq = 128
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# PF5 is the SCSI Controller PF. It gets 32 MSI/40 MSI-X vectors.
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# Not used right now.
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[function "5"]
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nvi = 1
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rssnvi = 0
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# PF6 is the FCoE Controller PF. It gets 32 MSI/40 MSI-X vectors.
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# Not used right now.
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[function "6"]
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nvi = 1
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rssnvi = 0
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# The following function, 1023, is not an actual PCIE function but is used to
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# configure and reserve firmware internal resources that come from the global
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# resource pool.
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#
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[function "1023"]
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wx_caps = all
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r_caps = all
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nvi = 4
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rssnvi = 0
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cmask = all
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pmask = all
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nexactf = 8
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nfilter = 16
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# For Virtual functions, we only allow NIC functionality and we only allow
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# access to one port (1 << PF). Note that because of limitations in the
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# Scatter Gather Engine (SGE) hardware which checks writes to VF KDOORBELL
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# and GTS registers, the number of Ingress and Egress Queues must be a power
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# of 2.
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#
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[function "0/*"]
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wx_caps = 0x82
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r_caps = 0x86
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x1
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[function "1/*"]
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wx_caps = 0x82
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r_caps = 0x86
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x2
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[function "2/*"]
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wx_caps = 0x82
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r_caps = 0x86
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x1
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[function "3/*"]
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wx_caps = 0x82
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r_caps = 0x86
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nvi = 1
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rssnvi = 0
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niqflint = 2
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nethctrl = 2
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neq = 4
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nexactf = 2
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cmask = all
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pmask = 0x2
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# MPS has 192K buffer space for ingress packets from the wire as well as
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# loopback path of the L2 switch.
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[port "0"]
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dcb = none
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#bg_mem = 25
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#lpbk_mem = 25
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hwm = 60
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lwm = 15
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dwm = 30
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[port "1"]
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dcb = none
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#bg_mem = 25
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#lpbk_mem = 25
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hwm = 60
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lwm = 15
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dwm = 30
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[fini]
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version = 0x1
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checksum = 0xa737b06f
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#
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# $FreeBSD$
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#
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