crypto: marvell - Copy IV vectors by DMA transfers for acipher requests
Add a TDMA descriptor at the end of the request for copying the
output IV vector via a DMA transfer. This is a good way for offloading
as much as processing as possible to the DMA and the crypto engine.
This is also required for processing multiple cipher requests
in chained mode, otherwise the content of the IV vector would be
overwritten by the last processed request.
Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/marvell/tdma.c b/drivers/crypto/marvell/tdma.c
index 4d23bf9..dc07335 100644
--- a/drivers/crypto/marvell/tdma.c
+++ b/drivers/crypto/marvell/tdma.c
@@ -69,6 +69,9 @@
if (type == CESA_TDMA_OP)
dma_pool_free(cesa_dev->dma->op_pool, tdma->op,
le32_to_cpu(tdma->src));
+ else if (type == CESA_TDMA_IV)
+ dma_pool_free(cesa_dev->dma->iv_pool, tdma->data,
+ le32_to_cpu(tdma->dst));
tdma = tdma->next;
dma_pool_free(cesa_dev->dma->tdma_desc_pool, old_tdma,
@@ -120,6 +123,32 @@
return new_tdma;
}
+int mv_cesa_dma_add_iv_op(struct mv_cesa_tdma_chain *chain, dma_addr_t src,
+ u32 size, u32 flags, gfp_t gfp_flags)
+{
+
+ struct mv_cesa_tdma_desc *tdma;
+ u8 *iv;
+ dma_addr_t dma_handle;
+
+ tdma = mv_cesa_dma_add_desc(chain, gfp_flags);
+ if (IS_ERR(tdma))
+ return PTR_ERR(tdma);
+
+ iv = dma_pool_alloc(cesa_dev->dma->iv_pool, flags, &dma_handle);
+ if (!iv)
+ return -ENOMEM;
+
+ tdma->byte_cnt = cpu_to_le32(size | BIT(31));
+ tdma->src = src;
+ tdma->dst = cpu_to_le32(dma_handle);
+ tdma->data = iv;
+
+ flags &= (CESA_TDMA_DST_IN_SRAM | CESA_TDMA_SRC_IN_SRAM);
+ tdma->flags = flags | CESA_TDMA_IV;
+ return 0;
+}
+
struct mv_cesa_op_ctx *mv_cesa_dma_add_op(struct mv_cesa_tdma_chain *chain,
const struct mv_cesa_op_ctx *op_templ,
bool skip_ctx,