static int crc32c_digest(struct ahash_request *req)
{
struct crypto_hash_walk walk;
u32 *mctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
u32 crc = *mctx;
int nbytes;
for (nbytes = crypto_hash_walk_first(req, &walk); nbytes;
nbytes = crypto_hash_walk_done(&walk, 0))
crc = crc32c(crc, walk.data, nbytes);
*(__le32 *)req->result = ~cpu_to_le32(crc);
return 0;
}
static int crc32c_update(struct ahash_request *req)
{
struct crypto_hash_walk walk;
u32 *crcp = ahash_request_ctx(req);
u32 crc = *crcp;
int nbytes;
for (nbytes = crypto_hash_walk_first(req, &walk); nbytes;
nbytes = crypto_hash_walk_done(&walk, 0))
crc = crc32c(crc, walk.data, nbytes);
*crcp = crc;
return 0;
}
static int n2_hash_async_digest(struct ahash_request *req,
unsigned int auth_type, unsigned int digest_size,
unsigned int result_size, void *hash_loc)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
struct cwq_initial_entry *ent;
struct crypto_hash_walk walk;
struct spu_queue *qp;
unsigned long flags;
int err = -ENODEV;
int nbytes, cpu;
/* The total effective length of the operation may not
* exceed 2^16.
*/
if (unlikely(req->nbytes > (1 << 16))) {
struct n2_hash_req_ctx *rctx = ahash_request_ctx(req);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags =
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
rctx->fallback_req.nbytes = req->nbytes;
rctx->fallback_req.src = req->src;
rctx->fallback_req.result = req->result;
return crypto_ahash_digest(&rctx->fallback_req);
}
n2_base_ctx_init(&ctx->base);
nbytes = crypto_hash_walk_first(req, &walk);
cpu = get_cpu();
qp = cpu_to_cwq[cpu];
if (!qp)
goto out;
spin_lock_irqsave(&qp->lock, flags);
/* XXX can do better, improve this later by doing a by-hand scatterlist
* XXX walk, etc.
*/
ent = qp->q + qp->tail;
ent->control = control_word_base(nbytes, 0, 0,
auth_type, digest_size,
false, true, false, false,
OPCODE_INPLACE_BIT |
OPCODE_AUTH_MAC);
ent->src_addr = __pa(walk.data);
ent->auth_key_addr = 0UL;
ent->auth_iv_addr = __pa(hash_loc);
ent->final_auth_state_addr = 0UL;
ent->enc_key_addr = 0UL;
ent->enc_iv_addr = 0UL;
ent->dest_addr = __pa(hash_loc);
nbytes = crypto_hash_walk_done(&walk, 0);
while (nbytes > 0) {
ent = spu_queue_next(qp, ent);
ent->control = (nbytes - 1);
ent->src_addr = __pa(walk.data);
ent->auth_key_addr = 0UL;
ent->auth_iv_addr = 0UL;
ent->final_auth_state_addr = 0UL;
ent->enc_key_addr = 0UL;
ent->enc_iv_addr = 0UL;
ent->dest_addr = 0UL;
nbytes = crypto_hash_walk_done(&walk, 0);
}
ent->control |= CONTROL_END_OF_BLOCK;
if (submit_and_wait_for_tail(qp, ent) != HV_EOK)
err = -EINVAL;
else
err = 0;
spin_unlock_irqrestore(&qp->lock, flags);
if (!err)
memcpy(req->result, hash_loc, result_size);
out:
put_cpu();
return err;
}
