Date: Wed, 27 Jan 2021 20:32:21 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: e1b50e8184fc - main - qat.4: Minor tweaks Message-ID: <202101272032.10RKWLhx014674@gitrepo.freebsd.org>
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The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=e1b50e8184fca00520774d43bd7bdd0ccbe9a1d2 commit e1b50e8184fca00520774d43bd7bdd0ccbe9a1d2 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-01-27 20:31:10 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2021-01-27 20:31:10 +0000 qat.4: Minor tweaks - Document a constraint on the AAD size for AES-GCM. - Note that the list of supported platforms and add-on devices is not complete and indicate that QAT devices will show up in pciconf output. [1] PR: 252984 [1] MFC after: 3 days Sponsored by: Rubicon Communications, LLC ("Netgate") --- share/man/man4/qat.4 | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/share/man/man4/qat.4 b/share/man/man4/qat.4 index 9e9491f22aea..92ee85ac64eb 100644 --- a/share/man/man4/qat.4 +++ b/share/man/man4/qat.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 5, 2020 +.Dd January 27, 2021 .Dt QAT 4 .Os .Sh NAME @@ -57,17 +57,29 @@ The driver implements .Xr crypto 4 support for some of the cryptographic acceleration functions of the Intel -QuickAssist device. +QuickAssist (QAT) device. The .Nm driver supports the QAT devices integrated with Atom C2000 and C3000 and Xeon -C620 and D-1500 chipsets, and the Intel QAT Adapter 8950. -It can accelerate AES in CBC, CTR, XTS (except for the C2000) and GCM modes, +C620 and D-1500 platforms, and the Intel QAT Adapter 8950. +Other platforms and adapters not listed here may also be supported. +QAT devices are enumerated through PCIe and are thus visible in +.Xr pciconf 8 +output. +.Pp +The +.Nm +driver can accelerate AES in CBC, CTR, XTS (except for the C2000) and GCM modes, and can perform authenticated encryption combining the CBC, CTR and XTS modes with SHA1-HMAC and SHA2-HMAC. The .Nm 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 +.Xr crypto 9 +requests that do not satisfy this constraint. .Sh SEE ALSO .Xr crypto 4 , .Xr ipsec 4 ,
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