[PATCH] crypto: fsl - Add cache flush after job descriptor swap

[Pawel Kochanowski]

On devices with CONFIG_SYS_FSL_SEC_BE an endianess swap is done before
sending descriptor to SEC/CAAM engine. A cache flush needs to be
performed to ensure that the updated descriptor is taken into account.

Signed-off-by: Pawel Kochanowski <pkochanowski at sii.pl>
---
 drivers/crypto/fsl/jr.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/fsl/jr.c b/drivers/crypto/fsl/jr.c
index 8f7a821ebf3..5a69e1f6bd8 100644
--- a/drivers/crypto/fsl/jr.c
+++ b/drivers/crypto/fsl/jr.c
@@ -162,6 +162,8 @@ static int jr_enqueue(uint32_t *desc_addr,
 	uint32_t desc_word;
 	int length = desc_len(desc_addr);
 	int i;
+	unsigned long start;
+	unsigned long end;
 #ifdef CONFIG_CAAM_64BIT
 	uint32_t *addr_hi, *addr_lo;
 #endif
@@ -176,6 +178,11 @@ static int jr_enqueue(uint32_t *desc_addr,
 		sec_out32((uint32_t *)&desc_addr[i], desc_word);
 	}
 
+	start = (unsigned long)desc_addr & ~(ARCH_DMA_MINALIGN - 1);
+	end = ALIGN((unsigned long)desc_addr +
+				length * sizeof(desc_addr[0]), ARCH_DMA_MINALIGN);
+	flush_dcache_range(start, end);
+
 	caam_dma_addr_t desc_phys_addr = virt_to_phys(desc_addr);
 
 	jr->info[head].desc_phys_addr = desc_phys_addr;
@@ -183,9 +190,9 @@ static int jr_enqueue(uint32_t *desc_addr,
 	jr->info[head].arg = arg;
 	jr->info[head].op_done = 0;
 
-	unsigned long start = (unsigned long)&jr->info[head] &
+	start = (unsigned long)&jr->info[head] &
 					~(ARCH_DMA_MINALIGN - 1);
-	unsigned long end = ALIGN((unsigned long)&jr->info[head] +
+	end = ALIGN((unsigned long)&jr->info[head] +
 				  sizeof(struct jr_info), ARCH_DMA_MINALIGN);
 	flush_dcache_range(start, end);
 
-- 
2.43.0