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Commit abefd674 authored by Gilad Ben-Yossef's avatar Gilad Ben-Yossef Committed by Greg Kroah-Hartman
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staging: ccree: introduce CryptoCell HW driver 



Introduce basic low level Arm TrustZone CryptoCell HW support.
This first patch doesn't actually register any Crypto API
transformations, these will follow up in the next patch.

This first revision supports the CC 712 REE component.

Signed-off-by: default avatarGilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f55a6d45

drivers/staging/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -104,4 +104,6 @@ source "drivers/staging/greybus/Kconfig" 


source "drivers/staging/vc04_services/Kconfig"



source "drivers/staging/ccree/Kconfig"



endif # STAGING

drivers/staging/Makefile

+1 −0
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@@ -41,4 +41,5 @@ obj-$(CONFIG_MOST) += most/ 
obj-$(CONFIG_KS7010)		+= ks7010/

obj-$(CONFIG_GREYBUS)		+= greybus/

obj-$(CONFIG_BCM2835_VCHIQ)	+= vc04_services/

obj-$(CONFIG_CRYPTO_DEV_CCREE)	+= ccree/

drivers/staging/ccree/Kconfig

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+19 −0
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config CRYPTO_DEV_CCREE

	tristate "Support for ARM TrustZone CryptoCell C7XX family of Crypto accelerators"

	depends on CRYPTO_HW && OF && HAS_DMA

	default n

	help

	  Say 'Y' to enable a driver for the Arm TrustZone CryptoCell 

	  C7xx. Currently only the CryptoCell 712 REE is supported.

	  Choose this if you wish to use hardware acceleration of

	  cryptographic operations on the system REE.

	  If unsure say Y.



config CCREE_DISABLE_COHERENT_DMA_OPS

	bool "Disable Coherent DMA operations for the CCREE driver"

	depends on CRYPTO_DEV_CCREE

	default n

	help

	  Say 'Y' to disable the use of coherent DMA operations by the

	  CCREE driver for debugging purposes.  

	  If unsure say N.

drivers/staging/ccree/Makefile

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obj-$(CONFIG_CRYPTO_DEV_CCREE) := ccree.o

ccree-y := ssi_driver.o ssi_sysfs.o ssi_buffer_mgr.o ssi_request_mgr.o ssi_sram_mgr.o ssi_pm.o ssi_pm_ext.o

drivers/staging/ccree/cc_bitops.h

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/*

 * Copyright (C) 2012-2017 ARM Limited or its affiliates.

 * 

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 */



/*!

 * \file cc_bitops.h

 * Bit fields operations macros.

 */

#ifndef _CC_BITOPS_H_

#define _CC_BITOPS_H_



#define BITMASK(mask_size) (((mask_size) < 32) ?	\

	((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL)

#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset))



#define BITFIELD_GET(word, bit_offset, bit_size) \

	(((word) >> (bit_offset)) & BITMASK(bit_size))

#define BITFIELD_SET(word, bit_offset, bit_size, new_val)   do {    \

	word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) |	    \

		(((new_val) & BITMASK(bit_size)) << (bit_offset));  \

} while (0)



/* Is val aligned to "align" ("align" must be power of 2) */

#ifndef IS_ALIGNED

#define IS_ALIGNED(val, align)		\

	(((uintptr_t)(val) & ((align) - 1)) == 0)

#endif



#define SWAP_ENDIAN(word)		\

	(((word) >> 24) | (((word) & 0x00FF0000) >> 8) | \

	(((word) & 0x0000FF00) << 8) | (((word) & 0x000000FF) << 24))



#ifdef BIG__ENDIAN

#define SWAP_TO_LE(word) SWAP_ENDIAN(word)

#define SWAP_TO_BE(word) word

#else

#define SWAP_TO_LE(word) word

#define SWAP_TO_BE(word) SWAP_ENDIAN(word)

#endif







/* Is val a multiple of "mult" ("mult" must be power of 2) */

#define IS_MULT(val, mult)              \

	(((val) & ((mult) - 1)) == 0)



#define IS_NULL_ADDR(adr)		\

	(!(adr))



#endif /*_CC_BITOPS_H_*/