diff options
| author |   Horia Geant? <horia.geanta@freescale.com> | 2015-07-17 16:54:52 +0300 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2015-07-20 15:53:41 +0800 |
| commit | f109674951440912b645de2761d5d851e261af98 (patch) | |
| tree | d71d16a08892cbad2b3e047d71589cb52b771937 /drivers/crypto/caam | |
| parent | crypto: caam - fix ERA property reading (diff) | |
| download | linux-dev-f109674951440912b645de2761d5d851e261af98.tar.xz linux-dev-f109674951440912b645de2761d5d851e261af98.zip | |
crypto: caam - fix snooping for write transactions
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, i.e. AXI3 Cacheable bit set.
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
Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 5 | ||||
| -rw-r--r-- | drivers/crypto/caam/regs.h | 6 |
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 598823746a3b..b924477c0d83 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -444,8 +444,9 @@ static int caam_probe(struct platform_device *pdev) * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel, * long pointers in master configuration register */ - setbits32(&ctrl->mcr, MCFGR_WDENABLE | - (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0)); + clrsetbits_be32(&ctrl->mcr, MCFGR_AWCACHE_MASK, MCFGR_AWCACHE_CACH | + MCFGR_WDENABLE | (sizeof(dma_addr_t) == sizeof(u64) ? + MCFGR_LONG_PTR : 0)); /* * Read the Compile Time paramters and SCFGR to determine diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h index 672c97489505..5e643523de15 100644 --- a/drivers/crypto/caam/regs.h +++ b/drivers/crypto/caam/regs.h @@ -395,10 +395,16 @@ struct caam_ctrl { /* AXI read cache control */ #define MCFGR_ARCACHE_SHIFT 12 #define MCFGR_ARCACHE_MASK (0xf << MCFGR_ARCACHE_SHIFT) +#define MCFGR_ARCACHE_BUFF (0x1 << MCFGR_ARCACHE_SHIFT) +#define MCFGR_ARCACHE_CACH (0x2 << MCFGR_ARCACHE_SHIFT) +#define MCFGR_ARCACHE_RALL (0x4 << MCFGR_ARCACHE_SHIFT) /* AXI write cache control */ #define MCFGR_AWCACHE_SHIFT 8 #define MCFGR_AWCACHE_MASK (0xf << MCFGR_AWCACHE_SHIFT) +#define MCFGR_AWCACHE_BUFF (0x1 << MCFGR_AWCACHE_SHIFT) +#define MCFGR_AWCACHE_CACH (0x2 << MCFGR_AWCACHE_SHIFT) +#define MCFGR_AWCACHE_WALL (0x8 << MCFGR_AWCACHE_SHIFT) /* AXI pipeline depth */ #define MCFGR_AXIPIPE_SHIFT 4 |