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4 .\" Copyright (c) 2000 Theo de Raadt
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33 .Nd Hifn 7751/7951/7811/7955/7956 crypto accelerator
35 To compile this driver into the kernel,
36 place the following lines in your
37 kernel configuration file:
38 .Bd -ragged -offset indent
40 .Cd "device cryptodev"
44 Alternatively, to load the driver as a
45 module at boot time, place the following line in
47 .Bd -literal -offset indent
53 driver supports various cards containing the Hifn 7751, 7951,
54 7811, 7955, and 7956 chipsets.
58 driver registers itself to accelerate DES, Triple-DES,
59 AES (7955 and 7956 only), ARC4, MD5,
60 MD5-HMAC, SHA1, and SHA1-HMAC operations for
71 will also supply data to the kernel
77 driver supports various cards containing the Hifn 7751, 7951,
80 .Bl -tag -width namenamenamena -offset indent
83 Came as 128KB SRAM model, or 2MB DRAM model.
85 Reference board with 512KB SRAM.
87 Comes with 512KB SRAM.
89 Only board based on 7811 (which is faster than 7751 and has
90 a random number generator).
92 Supports the most IPsec sessions, with 1MB SRAM.
93 .It Soekris Engineering vpn1201 and vpn1211
95 .Pa http://www.soekris.com/ .
96 Contains a 7951 and supports symmetric and random number operations.
97 .It Soekris Engineering vpn1401 and vpn1411
99 .Pa http://www.soekris.com/ .
100 Contains a 7955 and supports symmetric and random number operations.
110 The Hifn 9751 shares the same PCI ID.
111 This chip is basically a 7751, but with the cryptographic functions missing.
112 Instead, the 9751 is only capable of doing compression.
113 Since we do not currently attempt to use any of these chips to do
114 compression, the 9751-based cards are not useful.
116 Support for the 7955 and 7956 is incomplete; the asymmetric crypto
117 facilities are to be added and the performance is suboptimal.
121 device driver appeared in
125 device driver was imported to
128 The 7751 chip starts out at initialization by only supporting compression.
129 A proprietary algorithm, which has been reverse engineered, is required to
130 unlock the cryptographic functionality of the chip.
131 It is possible for vendors to make boards which have a lock ID not known
132 to the driver, but all vendors currently just use the obvious ID which is