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HIFN(4)		       FreeBSD Kernel Interfaces Manual		       HIFN(4)

     hifn -- Hifn 7751/7951/7811/7955/7956 crypto accelerator

     device hifn

     The hifn driver supports various cards containing the Hifn	7751, 7951,
     7811, 7955, and 7956 chipsets, such as

	   Invertex AEON   No longer being made.  Came as 128KB	SRAM model, or
			   2MB DRAM model.

	   Hifn	7751	   Reference board with	512KB SRAM.

	   PowerCrypt	   See  Comes with 512KB

	   XL-Crypt	   See  Only board based
			   on 7811 (which is faster than 7751 and has a	random
			   number generator).

	   NetSec 7751	   See	Supports the most
			   IPsec sessions, with	1MB SRAM.

	   Soekris Engineering vpn1201 and vpn1211
			   See	 Contains a 7951 and
			   supports symmetric and random number	operations.

	   Soekris Engineering vpn1401 and vpn1411
			   See	 Contains a 7955 and
			   supports symmetric and random number	operations.

     The hifn driver registers itself to accelerate DES, Triple-DES, AES (7955
     and 7956 only), ARC4, MD5,	MD5-HMAC, SHA1,	and SHA1-HMAC operations for
     ipsec(4) and crypto(4).

     The Hifn 7951, 7811, 7955,	and 7956 will also supply data to the kernel
     random(4) subsystem.

     The 7751 chip starts out at initialization	by only	supporting compres-
     sion.  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.

     crypt(3), crypto(4), intro(4), ipsec(4), random(4), crypto(9)

     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	use-

     Support for the 7955 and 7956 is incomplete; the asymetric	crypto facili-
     ties are to be added and the performance is suboptimal.

     The hifn device driver appeared in	OpenBSD	2.7.  The hifn device driver
     was imported to FreeBSD 5.0.

FreeBSD	11.1			October	8, 2003			  FreeBSD 11.1


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