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crypto: stm32 - CRC use relaxed function 

In case of arm soc support, readl and writel will
be optimized using relaxed functions

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
lionel.debieve@st.com 2017-07-13 15:06:31 +02:00 committed by Herbert Xu
parent 430f13389b
commit 391775191f
1 changed files with 8 additions and 7 deletions
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15
drivers/crypto/stm32/stm32_crc32.c
View File

@ -107,12 +107,12 @@ static int stm32_crc_init(struct shash_desc *desc)
spin_unlock_bh(&crc_list.lock);
/* Reset, set key, poly and configure in bit reverse mode */
writel(bitrev32(mctx->key), ctx->crc->regs + CRC_INIT);
writel(bitrev32(mctx->poly), ctx->crc->regs + CRC_POL);
writel(CRC_CR_RESET | CRC_CR_REVERSE, ctx->crc->regs + CRC_CR);
writel_relaxed(bitrev32(mctx->key), ctx->crc->regs + CRC_INIT);
writel_relaxed(bitrev32(mctx->poly), ctx->crc->regs + CRC_POL);
writel_relaxed(CRC_CR_RESET | CRC_CR_REVERSE, ctx->crc->regs + CRC_CR);
/* Store partial result */
ctx->partial = readl(ctx->crc->regs + CRC_DR);
ctx->partial = readl_relaxed(ctx->crc->regs + CRC_DR);
ctx->crc->nb_pending_bytes = 0;
return 0;
@ -135,7 +135,8 @@ static int stm32_crc_update(struct shash_desc *desc, const u8 *d8,
if (crc->nb_pending_bytes == sizeof(u32)) {
/* Process completed pending data */
writel(*(u32 *)crc->pending_data, crc->regs + CRC_DR);
writel_relaxed(*(u32 *)crc->pending_data,
crc->regs + CRC_DR);
crc->nb_pending_bytes = 0;
}
}
@ -143,10 +144,10 @@ static int stm32_crc_update(struct shash_desc *desc, const u8 *d8,
d32 = (u32 *)d8;
for (i = 0; i < length >> 2; i++)
/* Process 32 bits data */
writel(*(d32++), crc->regs + CRC_DR);
writel_relaxed(*(d32++), crc->regs + CRC_DR);
/* Store partial result */
ctx->partial = readl(crc->regs + CRC_DR);
ctx->partial = readl_relaxed(crc->regs + CRC_DR);
/* Check for pending data (non 32 bits) */
length &= 3;