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crypto: mxs-dcp - Align the bounce buffers 

The DCP needs the bounce buffers, DMA descriptors and result buffers aligned
to 64 bytes (yet another hardware limitation). Make sure they are aligned by
properly aligning the structure which contains them during allocation.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Marek Vasut 2014-03-03 01:23:15 +01:00 committed by Herbert Xu
parent 26f25b2695
commit 1a7c685611
1 changed files with 7 additions and 1 deletions
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8
drivers/crypto/mxs-dcp.c
View File

@ -29,6 +29,8 @@
#define DCP_MAX_CHANS 4
#define DCP_BUF_SZ PAGE_SIZE
#define DCP_ALIGNMENT 64
/* DCP DMA descriptor. */
struct dcp_dma_desc {
uint32_t next_cmd_addr;
@ -947,12 +949,16 @@ static int mxs_dcp_probe(struct platform_device *pdev)
}
/* Allocate coherent helper block. */
sdcp->coh = devm_kzalloc(dev, sizeof(*sdcp->coh), GFP_KERNEL);
sdcp->coh = devm_kzalloc(dev, sizeof(*sdcp->coh) + DCP_ALIGNMENT,
GFP_KERNEL);
if (!sdcp->coh) {
ret = -ENOMEM;
goto err_mutex;
}
/* Re-align the structure so it fits the DCP constraints. */
sdcp->coh = PTR_ALIGN(sdcp->coh, DCP_ALIGNMENT);
/* Restart the DCP block. */
ret = stmp_reset_block(sdcp->base);
if (ret)