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- * Texas Instruments Keystone Security Accelerator Crypto Driver
- The Security Accelerator (SA) is one of the main components of the Network
- Coprocessor (NETCP) peripheral. The SA works together with the Packet
- Accelerator (PA) and the Gigabit Ethernet (GbE) switch subsystem to
- form a network processing solution. The purpose of the SA is to assist
- the host by performing security related tasks. The SA provides hardware
- engines to perform encryption, decryption, and authentication operations on
- packets for commonly supported protocols, including IPsec ESP and AH, SRTP,
- and Air Cipher.
- See the http://www.ti.com/lit/ug/sprugy6b/sprugy6b.pdf for details.
- Keystone Linux kernel implements a crypto driver which offloads crypto
- algorithm processing to CP_ACE. Crypto driver registers algorithm implementations
- in the kernel's crypto algorithm management framework. Since the primary use
- case for this driver is IPSec ESP offload, it currently registers only AEAD
- algorithms.
- Following algorithms are supported by the driver:
- 1. authenc(hmac(sha1),cbc(aes))
- 2. authenc(hmac(sha1),cbc(des3-ede))
- 3. authenc(xcbc(aes),cbc(aes))
- 4. authenc(xcbc(aes),cbc(des3-ede))
- The driver source code:
- drivers/crypto/keystone-*.[ch]
- See the Documentation/devicetree/bindings/soc/ti/keystone-crypto.txt for
- configuration.
- In order to work driver requires the sa_mci.fw firmware. By default driver compiled as kernel
- module and loaded after root file system is mounted, it is enough to place the firmware to
- the /lib/firmware directory.
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