QAT_C2XXX(4)           FreeBSD Kernel Interfaces Manual           QAT_C2XXX(4)

NAME

     qat_c2xxx - Intel QuickAssist Technology crypto driver for Atom C2000

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
     <hikaru@iij.ad.jp>.
     Mark Johnston <markj@FreeBSD.org> 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 15.1-STABLE-HBSD         May 17, 2026                     QAT_C2XXX(4)