---
name: "ccr"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/ccr/4"
---

# ccr(4)

Chelsio T6 crypto accelerator driver

## NAME

**ccr** – Chelsio T6 crypto accelerator driver

## SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

**device ccr** **device cxgbe**

To load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
ccr_load="YES"
```

## DESCRIPTION

The **ccr** driver provides support for the crypto accelerator engine included on PCI Express Ethernet adapters based on the Chelsio Terminator 6 ASIC (T6). The driver accelerates AES-CBC, AES-CCM, AES-CTR, AES-GCM, AES-XTS, SHA1, SHA2-224, SHA2-256, SHA2-384, SHA2-512, SHA1-HMAC, SHA2-224-HMAC, SHA2-256-HMAC, SHA2-384-HMAC, and SHA2-512-HMAC operations for [crypto(9)](/crypto/9.md) consumers such as [ktls(4)](/ktls/4.md), geli(4), and [ipsec(4)](/ipsec/4.md). The driver also supports chaining one of AES-CBC, AES-CTR, or AES-XTS with SHA1-HMAC, SHA2-224-HMAC, SHA2-256-HMAC, SHA2-384-HMAC, or SHA2-512-HMAC for encrypt-then-authenticate operations. For further hardware information and questions related to hardware requirements, see *http://www.chelsio.com/*.

The **ccr** driver attaches as a child of an existing Chelsio NIC device and thus requires that the [cxgbe(4)](/cxgbe/4.md) driver be active.

## HARDWARE

The **ccr** driver supports the crypto accelerator engine included on adapters based on the T6 ASIC:

- Chelsio T6225-CR

- Chelsio T6225-SO-CR

- Chelsio T62100-LP-CR

- Chelsio T62100-SO-CR

- Chelsio T62100-CR

## SUPPORT

For general information and support, go to the Chelsio support website at: *http://www.chelsio.com/*.

If an issue is identified with this driver with a supported adapter, email all the specific information related to the issue to ⟨*support@chelsio.com*⟩.

## SEE ALSO

[crypto(4)](/crypto/4.md), [cxgbe(4)](/cxgbe/4.md), geli(4), [ipsec(4)](/ipsec/4.md), [ktls(4)](/ktls/4.md), [crypto(7)](/crypto/7.md), [crypto(9)](/crypto/9.md)

## HISTORY

The **ccr** device driver first appeared in FreeBSD 12.0.

## AUTHORS

The **ccr** driver was written by John Baldwin ⟨*jhb@FreeBSD.org*⟩.