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drivers/crypto/fsl: fix snooping for write transactions

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HW coherency won't work properly for CAAM write transactions
if AWCACHE is left to default (POR) value - 4'b0001.
It has to be programmed to 4'b0010.

For platforms that have HW coherency support:
-PPC-based: the update has no effect; CAAM coherency already works
due to the IOMMU (PAMU) driver setting the correct memory coherency
attributes
-ARM-based: the update fixes cache coherency issues,
since IOMMU (SMMU) driver is not programmed to behave similar to PAMU

Fixes: b9eebfade9 ("fsl_sec: Add hardware accelerated SHA256 and SHA1")
Signed-off-by: Horia Geantă <horia.geanta@freescale.com>
Reviewed-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Reviewed-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Acked-by: Ruchika Gupta<ruchika.gupta@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
horia.geanta@freescale.com 2015-07-08 17:24:57 +03:00 committed by York Sun
parent e5d08b4d60
commit 3ef2412de6
2 changed files with 8 additions and 4 deletions
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10
drivers/crypto/fsl/jr.c
View file

@ -468,14 +468,16 @@ static int rng_init(void)
int sec_init(void)
{
int ret = 0;
#ifdef CONFIG_PHYS_64BIT
ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
uint32_t mcr = sec_in32(&sec->mcfgr);
int ret = 0;
sec_out32(&sec->mcfgr, mcr | 1 << MCFGR_PS_SHIFT);
mcr = (mcr & ~MCFGR_AWCACHE_MASK) | (0x2 << MCFGR_AWCACHE_SHIFT);
#ifdef CONFIG_PHYS_64BIT
mcr |= (1 << MCFGR_PS_SHIFT);
#endif
sec_out32(&sec->mcfgr, mcr);
ret = jr_init();
if (ret < 0) {
printf("SEC initialization failed\n");

2
drivers/crypto/fsl/jr.h
View file

@ -21,6 +21,8 @@
#define MCFGR_SWRST ((uint32_t)(1)<<31) /* Software Reset */
#define MCFGR_DMA_RST ((uint32_t)(1)<<28) /* DMA Reset */
#define MCFGR_PS_SHIFT 16
#define MCFGR_AWCACHE_SHIFT 8
#define MCFGR_AWCACHE_MASK (0xf << MCFGR_AWCACHE_SHIFT)
#define JR_INTMASK 0x00000001
#define JRCR_RESET 0x01
#define JRINT_ERR_HALT_INPROGRESS 0x4