crypto: inside-secure - move hash result dma mapping to request

In heavy traffic the DMA mapping is overwritten by multiple requests as
the DMA address is stored in a global context. This patch moves this
information to the per-hash request context so that it can't be
overwritten.

Fixes: 1b44c5a60c13 ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
Signed-off-by: Ofer Heifetz <oferh@marvell.com>
[Antoine: rebased the patch, small fixes, commit message.]
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index 956a376..0c33bdb 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -538,15 +538,10 @@ finalize:
 }
 
 void safexcel_free_context(struct safexcel_crypto_priv *priv,
-                          struct crypto_async_request *req,
-                          int result_sz)
+                          struct crypto_async_request *req)
 {
        struct safexcel_context *ctx = crypto_tfm_ctx(req->tfm);
 
-       if (ctx->result_dma)
-               dma_unmap_single(priv->dev, ctx->result_dma, result_sz,
-                                DMA_FROM_DEVICE);
-
        if (ctx->cache) {
                dma_unmap_single(priv->dev, ctx->cache_dma, ctx->cache_sz,
                                 DMA_TO_DEVICE);

diff --git a/drivers/crypto/inside-secure/safexcel.h b/drivers/crypto/inside-secure/safexcel.h
index caaf6a8..4e14c7e 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel.h
+++ b/drivers/crypto/inside-secure/safexcel.h
@@ -580,7 +580,6 @@ struct safexcel_context {
        bool exit_inv;
 
        /* Used for ahash requests */
-       dma_addr_t result_dma;
        void *cache;
        dma_addr_t cache_dma;
        unsigned int cache_sz;
@@ -608,8 +607,7 @@ struct safexcel_inv_result {
 void safexcel_dequeue(struct safexcel_crypto_priv *priv, int ring);
 void safexcel_complete(struct safexcel_crypto_priv *priv, int ring);
 void safexcel_free_context(struct safexcel_crypto_priv *priv,
-                                 struct crypto_async_request *req,
-                                 int result_sz);
+                                 struct crypto_async_request *req);
 int safexcel_invalidate_cache(struct crypto_async_request *async,
                              struct safexcel_crypto_priv *priv,
                              dma_addr_t ctxr_dma, int ring,

diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
index a4960a9..e33f089 100644 (file)
--- a/drivers/crypto/inside-secure/safexcel_hash.c
+++ b/drivers/crypto/inside-secure/safexcel_hash.c
@@ -34,6 +34,7 @@ struct safexcel_ahash_req {
        bool needs_inv;
 
        int nents;
+       dma_addr_t result_dma;
 
        u8 state_sz;    /* expected sate size, only set once */
        u32 state[SHA256_DIGEST_SIZE / sizeof(u32)] __aligned(sizeof(u32));
@@ -158,7 +159,13 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin
                sreq->nents = 0;
        }
 
-       safexcel_free_context(priv, async, sreq->state_sz);
+       if (sreq->result_dma) {
+               dma_unmap_single(priv->dev, sreq->result_dma, sreq->state_sz,
+                                DMA_FROM_DEVICE);
+               sreq->result_dma = 0;
+       }
+
+       safexcel_free_context(priv, async);
 
        cache_len = sreq->len - sreq->processed;
        if (cache_len)
@@ -291,15 +298,15 @@ send_command:
        /* Add the token */
        safexcel_hash_token(first_cdesc, len, req->state_sz);
 
-       ctx->base.result_dma = dma_map_single(priv->dev, req->state,
-                                             req->state_sz, DMA_FROM_DEVICE);
-       if (dma_mapping_error(priv->dev, ctx->base.result_dma)) {
+       req->result_dma = dma_map_single(priv->dev, req->state, req->state_sz,
+                                        DMA_FROM_DEVICE);
+       if (dma_mapping_error(priv->dev, req->result_dma)) {
                ret = -EINVAL;
                goto cdesc_rollback;
        }
 
        /* Add a result descriptor */
-       rdesc = safexcel_add_rdesc(priv, ring, 1, 1, ctx->base.result_dma,
+       rdesc = safexcel_add_rdesc(priv, ring, 1, 1, req->result_dma,
                                   req->state_sz);
        if (IS_ERR(rdesc)) {
                ret = PTR_ERR(rdesc);