Copyright (c) 2000 Theo de Raadt
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$FreeBSD: head/share/man/man4/hifn.4 107728 2002-12-10 14:21:55Z ru $
.Dd October 3, 2002 .Dt HIFN 4 .Os .Sh NAME .Nm hifn .Nd Hifn 7751/7951/7811 crypto accelerator .Sh SYNOPSIS .Cd device hifn .Sh DESCRIPTION The .Nm driver supports various cards containing the Hifn 7751, Hifn 7951, or Hifn 7811 chipsets, such as l -tag -width namenamenamena -offset indent t Invertex AEON No longer being made. Came as 128KB SRAM model, or 2MB DRAM model. t Hifn 7751 Reference board with 512KB SRAM. t PowerCrypt See
a http://www.powercrypt.com/ . Comes with 512KB SRAM. t XL-Crypt See
a http://www.powercrypt.com/ . Only board based on 7811 (which is faster than 7751 and has a random number generator). t NetSec 7751 See
a http://www.netsec.net/ . Supports the most IPsec sessions, with 1MB SRAM. t Soekris Engineering vpn1201 and vpn1211 See
a http://www.soekris.com/ . Contains a 7951 and supports symmetric and random number operations. .El
p The .Nm driver registers itself to accelerate DES, Triple-DES, ARC4, MD5, MD5-HMAC, SHA1, and SHA1-HMAC operations for .Xr ipsec 4 and .Xr crypto 4 .
p The .Tn Hifn 7951 and .Tn Hifn 7811 will also supply data to the kernel .Xr random 4 subsystem. .Sh BUGS The 7751 chip starts out at initialization by only supporting compression. A proprietary algorithm, which has been reverse engineered, is required to unlock the cryptographic functionality of the chip. It is possible for vendors to make boards which have a lock ID not known to the driver, but all vendors currently just use the obvious ID which is 13 bytes of 0. .Sh SEE ALSO .Xr crypt 3 , .Xr crypto 4 , .Xr intro 4 , .Xr ipsec 4 , .Xr random 4 , .Xr crypto 9 .Sh CAVEATS The Hifn 9751 shares the same PCI ID. This chip is basically a 7751, but with the cryptographic functions missing. Instead, the 9751 is only capable of doing compression. Since we do not currently attempt to use any of these chips to do compression, the 9751-based cards are not useful. .Sh HISTORY The .Nm device driver appeared in .Ox 2.7 . The .Nm device driver was imported to .Fx 5.0 .