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authorLokesh Vutla <lokeshvutla@ti.com>2013-08-20 20:32:35 +0530
committerHerbert Xu <herbert@gondor.apana.org.au>2013-08-21 21:28:08 +1000
commitf5e4626097f865783177f265d7793995bd8a2a76 (patch)
treefb3e80ece1d2ab75c89c5275da67a19b63db9c78 /drivers/crypto
parentb8411ccd613fc7c504104f56265bd640b6c42d8e (diff)
crypto: omap-sham - correct dma burst size
Each cycle of SHA512 operates on 32 data words where as SHA256 operates on 16 data words. This needs to be updated while configuring DMA channels. Doing the same. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-sham.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 0a2bd160849a..8bdde57f6bb1 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -46,9 +46,6 @@
#define MD5_DIGEST_SIZE 16
-#define DST_MAXBURST 16
-#define DMA_MIN (DST_MAXBURST * sizeof(u32))
-
#define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04))
#define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04))
#define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs)
@@ -558,7 +555,7 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
struct dma_async_tx_descriptor *tx;
struct dma_slave_config cfg;
- int len32, ret;
+ int len32, ret, dma_min = get_block_size(ctx);
dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
ctx->digcnt, length, final);
@@ -567,7 +564,7 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- cfg.dst_maxburst = DST_MAXBURST;
+ cfg.dst_maxburst = dma_min / DMA_SLAVE_BUSWIDTH_4_BYTES;
ret = dmaengine_slave_config(dd->dma_lch, &cfg);
if (ret) {
@@ -575,7 +572,7 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
return ret;
}
- len32 = DIV_ROUND_UP(length, DMA_MIN) * DMA_MIN;
+ len32 = DIV_ROUND_UP(length, dma_min) * dma_min;
if (is_sg) {
/*
@@ -729,7 +726,7 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
* the dmaengine infrastructure will calculate that it needs
* to transfer 0 frames which ultimately fails.
*/
- if (ctx->total < (DST_MAXBURST * sizeof(u32)))
+ if (ctx->total < get_block_size(ctx))
return omap_sham_update_dma_slow(dd);
dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",