From 3ef2412de6680c751abd39047cadff7e052a0f51 Mon Sep 17 00:00:00 2001 From: "horia.geanta@freescale.com" Date: Wed, 8 Jul 2015 17:24:57 +0300 Subject: [PATCH] drivers/crypto/fsl: fix snooping for write transactions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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: b9eebfade974c ("fsl_sec: Add hardware accelerated SHA256 and SHA1") Signed-off-by: Horia Geantă Reviewed-by: Aneesh Bansal Reviewed-by: Mingkai Hu Acked-by: Ruchika Gupta Reviewed-by: York Sun --- drivers/crypto/fsl/jr.c | 10 ++++++---- drivers/crypto/fsl/jr.h | 2 ++ 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/crypto/fsl/jr.c b/drivers/crypto/fsl/jr.c index 3560668..17392c9 100644 --- a/drivers/crypto/fsl/jr.c +++ b/drivers/crypto/fsl/jr.c @@ -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"); diff --git a/drivers/crypto/fsl/jr.h b/drivers/crypto/fsl/jr.h index cce2c58..1526060 100644 --- a/drivers/crypto/fsl/jr.h +++ b/drivers/crypto/fsl/jr.h @@ -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