static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
{
struct ahash_request *req = ahash_request_cast(async_req);
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_sha_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
struct qce_alg_template *tmpl = to_ahash_tmpl(async_req->tfm);
struct qce_device *qce = tmpl->qce;
unsigned long flags = rctx->flags;
int ret;
if (IS_SHA_HMAC(flags)) {
rctx->authkey = ctx->authkey;
rctx->authklen = QCE_SHA_HMAC_KEY_SIZE;
} else if (IS_CMAC(flags)) {
rctx->authkey = ctx->authkey;
rctx->authklen = AES_KEYSIZE_128;
}
rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
if (rctx->src_nents < 0) {
dev_err(qce->dev, "Invalid numbers of src SG.\n");
return rctx->src_nents;
}
ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
if (ret < 0)
return ret;
sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
ret = dma_map_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
if (ret < 0)
goto error_unmap_src;
ret = qce_dma_prep_sgs(&qce->dma, req->src, rctx->src_nents,
&rctx->result_sg, 1, qce_ahash_done, async_req);
if (ret)
goto error_unmap_dst;
qce_dma_issue_pending(&qce->dma);
ret = qce_start(async_req, tmpl->crypto_alg_type, 0, 0);
if (ret)
goto error_terminate;
return 0;
error_terminate:
qce_dma_terminate_all(&qce->dma);
error_unmap_dst:
dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
error_unmap_src:
dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
return ret;
}
static int qce_ahash_init(struct ahash_request *req)
{
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
const u32 *std_iv = tmpl->std_iv;
memset(rctx, 0, sizeof(*rctx));
rctx->first_blk = true;
rctx->last_blk = false;
rctx->flags = tmpl->alg_flags;
memcpy(rctx->digest, std_iv, sizeof(rctx->digest));
return 0;
}
static int qce_ahash_digest(struct ahash_request *req)
{
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
struct qce_device *qce = tmpl->qce;
int ret;
ret = qce_ahash_init(req);
if (ret)
return ret;
rctx->src_orig = req->src;
rctx->nbytes_orig = req->nbytes;
rctx->first_blk = true;
rctx->last_blk = true;
return qce->async_req_enqueue(tmpl->qce, &req->base);
}
static void qce_ahash_done(void *data)
{
struct crypto_async_request *async_req = data;
struct ahash_request *req = ahash_request_cast(async_req);
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_alg_template *tmpl = to_ahash_tmpl(async_req->tfm);
struct qce_device *qce = tmpl->qce;
struct qce_result_dump *result = qce->dma.result_buf;
unsigned int digestsize = crypto_ahash_digestsize(ahash);
int error;
u32 status;
error = qce_dma_terminate_all(&qce->dma);
if (error)
dev_dbg(qce->dev, "ahash dma termination error (%d)\n", error);
qce_unmapsg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE,
rctx->src_chained);
qce_unmapsg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE, 0);
memcpy(rctx->digest, result->auth_iv, digestsize);
if (req->result)
memcpy(req->result, result->auth_iv, digestsize);
rctx->byte_count[0] = cpu_to_be32(result->auth_byte_count[0]);
rctx->byte_count[1] = cpu_to_be32(result->auth_byte_count[1]);
error = qce_check_status(qce, &status);
if (error < 0)
dev_dbg(qce->dev, "ahash operation error (%x)\n", status);
req->src = rctx->src_orig;
req->nbytes = rctx->nbytes_orig;
rctx->last_blk = false;
rctx->first_blk = false;
qce->async_req_done(tmpl->qce, error);
}
static int qce_ahash_final(struct ahash_request *req)
{
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
struct qce_device *qce = tmpl->qce;
if (!rctx->buflen)
return 0;
rctx->last_blk = true;
rctx->src_orig = req->src;
rctx->nbytes_orig = req->nbytes;
memcpy(rctx->tmpbuf, rctx->buf, rctx->buflen);
sg_init_one(rctx->sg, rctx->tmpbuf, rctx->buflen);
req->src = rctx->sg;
req->nbytes = rctx->buflen;
return qce->async_req_enqueue(tmpl->qce, &req->base);
}
static int qce_ahash_update(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
struct qce_device *qce = tmpl->qce;
struct scatterlist *sg_last, *sg;
unsigned int total, len;
unsigned int hash_later;
unsigned int nbytes;
unsigned int blocksize;
blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
rctx->count += req->nbytes;
/* check for buffer from previous updates and append it */
total = req->nbytes + rctx->buflen;
if (total <= blocksize) {
scatterwalk_map_and_copy(rctx->buf + rctx->buflen, req->src,
0, req->nbytes, 0);
rctx->buflen += req->nbytes;
return 0;
}
/* save the original req structure fields */
rctx->src_orig = req->src;
rctx->nbytes_orig = req->nbytes;
/*
* if we have data from previous update copy them on buffer. The old
* data will be combined with current request bytes.
*/
if (rctx->buflen)
memcpy(rctx->tmpbuf, rctx->buf, rctx->buflen);
/* calculate how many bytes will be hashed later */
hash_later = total % blocksize;
if (hash_later) {
unsigned int src_offset = req->nbytes - hash_later;
scatterwalk_map_and_copy(rctx->buf, req->src, src_offset,
hash_later, 0);
}
/* here nbytes is multiple of blocksize */
nbytes = total - hash_later;
len = rctx->buflen;
sg = sg_last = req->src;
while (len < nbytes && sg) {
if (len + sg_dma_len(sg) > nbytes)
break;
len += sg_dma_len(sg);
sg_last = sg;
sg = sg_next(sg);
}
if (!sg_last)
return -EINVAL;
sg_mark_end(sg_last);
if (rctx->buflen) {
sg_init_table(rctx->sg, 2);
sg_set_buf(rctx->sg, rctx->tmpbuf, rctx->buflen);
sg_chain(rctx->sg, 2, req->src);
req->src = rctx->sg;
}
req->nbytes = nbytes;
rctx->buflen = hash_later;
return qce->async_req_enqueue(tmpl->qce, &req->base);
}
