QAT_C2XXX(4) FreeBSD Kernel Interfaces Manual QAT_C2XXX(4)
NAME
qat_c2xxx - Intel QuickAssist Technology (QAT) driver for Atom C2000
chipsets
SYNOPSIS
To compile this driver into the kernel, place the following lines in your
kernel configuration file:
device crypto
device cryptodev
device qat
Alternatively, to load the driver as a module at boot time, place the
following lines in loader.conf(5):
qat_c2xxx_load="YES"
qat_c2xxxfw_load="YES"
DESCRIPTION
The qat_c2xxx driver implements crypto(4) support for some of the
cryptographic acceleration functions of the Intel QuickAssist (QAT)
device found on Atom C2000 devices. QAT devices are enumerated through
PCIe and are thus visible in pciconf(8) output.
The qat_c2xxx driver can accelerate AES in CBC, CTR, and GCM modes, and
can perform authenticated encryption combining the CBC, and CTR modes
with SHA1-HMAC and SHA2-HMAC. The qat_c2xxx driver can also compute SHA1
and SHA2 digests. The implementation of AES-GCM has a firmware-imposed
constraint that the length of any additional authenticated data (AAD)
must not exceed 240 bytes. The driver thus rejects crypto(9) requests
that do not satisfy this constraint.
SEE ALSO
crypto(4), ipsec(4), pci(4), qat(4), random(4), crypto(7), crypto(9)
HISTORY
The qat_c2xxx driver first appeared in FreeBSD 13.0.
AUTHORS
The qat_c2xxx driver was written for NetBSD by Hikaru Abe
<
[email protected]>.
Mark Johnston <
[email protected]> ported the driver to FreeBSD.
BUGS
Some Atom C2000 QAT devices have two acceleration engines instead of one.
The qat_c2xxx driver currently misbehaves when both are enabled and thus
does not enable the second acceleration engine if one is present.
FreeBSD 14.1-RELEASE-p8 July 21, 2022 FreeBSD 14.1-RELEASE-p8