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path: root/drivers/crypto/inside-secure/safexcel_hash.c
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Diffstat (limited to 'drivers/crypto/inside-secure/safexcel_hash.c')
-rw-r--r--drivers/crypto/inside-secure/safexcel_hash.c92
1 files changed, 55 insertions, 37 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
index ac9282c1a5ec..a80a5e757b1f 100644
--- a/drivers/crypto/inside-secure/safexcel_hash.c
+++ b/drivers/crypto/inside-secure/safexcel_hash.c
@@ -41,19 +41,21 @@ struct safexcel_ahash_req {
u64 len[2];
u64 processed[2];
- u8 cache[SHA512_BLOCK_SIZE] __aligned(sizeof(u32));
+ u8 cache[SHA512_BLOCK_SIZE << 1] __aligned(sizeof(u32));
dma_addr_t cache_dma;
unsigned int cache_sz;
- u8 cache_next[SHA512_BLOCK_SIZE] __aligned(sizeof(u32));
+ u8 cache_next[SHA512_BLOCK_SIZE << 1] __aligned(sizeof(u32));
};
static inline u64 safexcel_queued_len(struct safexcel_ahash_req *req)
{
- if (req->len[1] > req->processed[1])
- return 0xffffffff - (req->len[0] - req->processed[0]);
+ u64 len, processed;
- return req->len[0] - req->processed[0];
+ len = (0xffffffff * req->len[1]) + req->len[0];
+ processed = (0xffffffff * req->processed[1]) + req->processed[0];
+
+ return len - processed;
}
static void safexcel_hash_token(struct safexcel_command_desc *cdesc,
@@ -87,6 +89,9 @@ static void safexcel_context_control(struct safexcel_ahash_ctx *ctx,
cdesc->control_data.control0 |= ctx->alg;
cdesc->control_data.control0 |= req->digest;
+ if (!req->finish)
+ cdesc->control_data.control0 |= CONTEXT_CONTROL_NO_FINISH_HASH;
+
if (req->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED) {
if (req->processed[0] || req->processed[1]) {
if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_MD5)
@@ -105,9 +110,6 @@ static void safexcel_context_control(struct safexcel_ahash_ctx *ctx,
cdesc->control_data.control0 |= CONTEXT_CONTROL_RESTART_HASH;
}
- if (!req->finish)
- cdesc->control_data.control0 |= CONTEXT_CONTROL_NO_FINISH_HASH;
-
/*
* Copy the input digest if needed, and setup the context
* fields. Do this now as we need it to setup the first command
@@ -183,6 +185,7 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin
dma_unmap_single(priv->dev, sreq->cache_dma, sreq->cache_sz,
DMA_TO_DEVICE);
sreq->cache_dma = 0;
+ sreq->cache_sz = 0;
}
if (sreq->finish)
@@ -209,11 +212,15 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
struct safexcel_command_desc *cdesc, *first_cdesc = NULL;
struct safexcel_result_desc *rdesc;
struct scatterlist *sg;
- int i, extra, n_cdesc = 0, ret = 0;
- u64 queued, len, cache_len;
+ int i, extra = 0, n_cdesc = 0, ret = 0;
+ u64 queued, len, cache_len, cache_max;
+
+ cache_max = crypto_ahash_blocksize(ahash);
+ if (req->digest == CONTEXT_CONTROL_DIGEST_HMAC)
+ cache_max <<= 1;
queued = len = safexcel_queued_len(req);
- if (queued <= crypto_ahash_blocksize(ahash))
+ if (queued <= cache_max)
cache_len = queued;
else
cache_len = queued - areq->nbytes;
@@ -223,26 +230,23 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
* fit into full blocks, cache it for the next send() call.
*/
extra = queued & (crypto_ahash_blocksize(ahash) - 1);
+
+ if (req->digest == CONTEXT_CONTROL_DIGEST_HMAC &&
+ extra < crypto_ahash_blocksize(ahash))
+ extra += crypto_ahash_blocksize(ahash);
+
+ /* If this is not the last request and the queued data
+ * is a multiple of a block, cache the last one for now.
+ */
if (!extra)
- /* If this is not the last request and the queued data
- * is a multiple of a block, cache the last one for now.
- */
extra = crypto_ahash_blocksize(ahash);
- if (extra) {
- sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
- req->cache_next, extra,
- areq->nbytes - extra);
-
- queued -= extra;
- len -= extra;
+ sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
+ req->cache_next, extra,
+ areq->nbytes - extra);
- if (!queued) {
- *commands = 0;
- *results = 0;
- return 0;
- }
- }
+ queued -= extra;
+ len -= extra;
}
/* Add a command descriptor for the cached data, if any */
@@ -269,8 +273,7 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
}
/* Now handle the current ahash request buffer(s) */
- req->nents = dma_map_sg(priv->dev, areq->src,
- sg_nents_for_len(areq->src, areq->nbytes),
+ req->nents = dma_map_sg(priv->dev, areq->src, sg_nents(areq->src),
DMA_TO_DEVICE);
if (!req->nents) {
ret = -ENOMEM;
@@ -345,6 +348,7 @@ unmap_cache:
if (req->cache_dma) {
dma_unmap_single(priv->dev, req->cache_dma, req->cache_sz,
DMA_TO_DEVICE);
+ req->cache_dma = 0;
req->cache_sz = 0;
}
@@ -486,7 +490,7 @@ static int safexcel_ahash_exit_inv(struct crypto_tfm *tfm)
struct safexcel_inv_result result = {};
int ring = ctx->base.ring;
- memset(req, 0, sizeof(struct ahash_request));
+ memset(req, 0, EIP197_AHASH_REQ_SIZE);
/* create invalidation request */
init_completion(&result.completion);
@@ -519,10 +523,9 @@ static int safexcel_ahash_exit_inv(struct crypto_tfm *tfm)
/* safexcel_ahash_cache: cache data until at least one request can be sent to
* the engine, aka. when there is at least 1 block size in the pipe.
*/
-static int safexcel_ahash_cache(struct ahash_request *areq)
+static int safexcel_ahash_cache(struct ahash_request *areq, u32 cache_max)
{
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
- struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
u64 queued, cache_len;
/* queued: everything accepted by the driver which will be handled by
@@ -539,7 +542,7 @@ static int safexcel_ahash_cache(struct ahash_request *areq)
* In case there isn't enough bytes to proceed (less than a
* block size), cache the data until we have enough.
*/
- if (cache_len + areq->nbytes <= crypto_ahash_blocksize(ahash)) {
+ if (cache_len + areq->nbytes <= cache_max) {
sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
req->cache + cache_len,
areq->nbytes, 0);
@@ -599,6 +602,7 @@ static int safexcel_ahash_update(struct ahash_request *areq)
{
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
+ u32 cache_max;
/* If the request is 0 length, do nothing */
if (!areq->nbytes)
@@ -608,7 +612,11 @@ static int safexcel_ahash_update(struct ahash_request *areq)
if (req->len[0] < areq->nbytes)
req->len[1]++;
- safexcel_ahash_cache(areq);
+ cache_max = crypto_ahash_blocksize(ahash);
+ if (req->digest == CONTEXT_CONTROL_DIGEST_HMAC)
+ cache_max <<= 1;
+
+ safexcel_ahash_cache(areq, cache_max);
/*
* We're not doing partial updates when performing an hmac request.
@@ -621,7 +629,7 @@ static int safexcel_ahash_update(struct ahash_request *areq)
return safexcel_ahash_enqueue(areq);
if (!req->last_req &&
- safexcel_queued_len(req) > crypto_ahash_blocksize(ahash))
+ safexcel_queued_len(req) > cache_max)
return safexcel_ahash_enqueue(areq);
return 0;
@@ -678,6 +686,11 @@ static int safexcel_ahash_export(struct ahash_request *areq, void *out)
struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
struct safexcel_ahash_export_state *export = out;
+ u32 cache_sz;
+
+ cache_sz = crypto_ahash_blocksize(ahash);
+ if (req->digest == CONTEXT_CONTROL_DIGEST_HMAC)
+ cache_sz <<= 1;
export->len[0] = req->len[0];
export->len[1] = req->len[1];
@@ -687,7 +700,7 @@ static int safexcel_ahash_export(struct ahash_request *areq, void *out)
export->digest = req->digest;
memcpy(export->state, req->state, req->state_sz);
- memcpy(export->cache, req->cache, crypto_ahash_blocksize(ahash));
+ memcpy(export->cache, req->cache, cache_sz);
return 0;
}
@@ -697,12 +710,17 @@ static int safexcel_ahash_import(struct ahash_request *areq, const void *in)
struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
const struct safexcel_ahash_export_state *export = in;
+ u32 cache_sz;
int ret;
ret = crypto_ahash_init(areq);
if (ret)
return ret;
+ cache_sz = crypto_ahash_blocksize(ahash);
+ if (req->digest == CONTEXT_CONTROL_DIGEST_HMAC)
+ cache_sz <<= 1;
+
req->len[0] = export->len[0];
req->len[1] = export->len[1];
req->processed[0] = export->processed[0];
@@ -710,7 +728,7 @@ static int safexcel_ahash_import(struct ahash_request *areq, const void *in)
req->digest = export->digest;
- memcpy(req->cache, export->cache, crypto_ahash_blocksize(ahash));
+ memcpy(req->cache, export->cache, cache_sz);
memcpy(req->state, export->state, req->state_sz);
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 16:34:20 +0100