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crypto: omap-crypto - Verify page zone scatterlists before starting DMA

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In certain platforms like DRA7xx having memory > 2GB with LPAE enabled
has a constraint that DMA can be done with the initial 2GB and marks it
as ZONE_DMA. But openssl when used with cryptodev does not make sure that
input buffer is DMA capable. So, adding a check to verify if the input
buffer is capable of DMA.

Signed-off-by: Tero Kristo <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Tero Kristo 2018-02-27 15:30:35 +02:00 • committed by Herbert Xu
commit 065fa2523d
1 changed files with 4 additions and 0 deletions
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4
drivers/crypto/omap-crypto.c
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@ -104,6 +104,10 @@ static int omap_crypto_check_sg(struct scatterlist *sg, int total, int bs,
return OMAP_CRYPTO_NOT_ALIGNED;
if (!IS_ALIGNED(sg->length, bs))
return OMAP_CRYPTO_NOT_ALIGNED;
#ifdef CONFIG_ZONE_DMA
if (page_zonenum(sg_page(sg)) != ZONE_DMA)
return OMAP_CRYPTO_NOT_ALIGNED;
#endif
len += sg->length;
sg = sg_next(sg);