Crypto hw acceleration for openssl

[Winston Tsai]

I got roughly the same performance results when I use the openssl speed
test with and without a hifn 7956 cryto card
Here's what I did:
After the card is plugged in, kldload hifn; kldload cryptodev;
I got the message:
hifn0 mem 0xfc8f0000-0xfc8f7ffff, 0xfc8f0000-0xfc8f7ffff,
0xfc8f0000-0xfc8f7ffff irg 28 at device 3.0 on pci1
hifn0: Hifn 7956, rev 0, 32KB dram, pll=0x800<pci clk, 4x mult>
Then I ran:
Openssl speed des-cbc
And got the following result:
16 bytes   64 bytes   256 bytes  1024 bytes  8192 bytes
43251.97k  44919.41k  45342.43k  45506.13k   45579.98k
Then I did kldunload hifn; kldunload cryptodev and ran the same test
again, and got
16 bytes   64 bytes   256 bytes  1024 bytes  8192 bytes
43108.10k  44917.96k  45460.88k  45532.15k   45566.26k

Version of FreeBSD is 5.3-RELEASE. I believe both crypto and cryptodev
drivers are supported since v5.0.
 
My understanding is that openssl will detect the presence of an
accelerator card and use it (via \dev\crypto) instead of the crypto
library.
Did I miss something here?
TIA,
Winston