Hi,
I know that this patch has been queued up, but ...
On 10/02/2015 09:01 AM, LABBE Corentin wrote:
> The qce driver use two dma_map_sg path according to SG are chained
> or not.
> Since dma_map_sg can handle both case, clean the code with all
> references to sg chained.
>
> Thus removing qce_mapsg, qce_unmapsg and qce_countsg functions.
>
> Signed-off-by: LABBE Corentin <clabbe.montj...@gmail.com>
> ---
> drivers/crypto/qce/ablkcipher.c | 30 ++++++++----------------
> drivers/crypto/qce/cipher.h | 4 ----
> drivers/crypto/qce/dma.c | 52
> -----------------------------------------
> drivers/crypto/qce/dma.h | 5 ----
> drivers/crypto/qce/sha.c | 18 ++++++--------
> drivers/crypto/qce/sha.h | 2 --
> 6 files changed, 17 insertions(+), 94 deletions(-)
>
<snip>
> diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
> index be2f504..0c9973e 100644
> --- a/drivers/crypto/qce/sha.c
> +++ b/drivers/crypto/qce/sha.c
> @@ -51,9 +51,8 @@ static void qce_ahash_done(void *data)
> 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);
> + dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
> + dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
>
> memcpy(rctx->digest, result->auth_iv, digestsize);
> if (req->result)
> @@ -92,16 +91,14 @@ static int qce_ahash_async_req_handle(struct
> crypto_async_request *async_req)
> rctx->authklen = AES_KEYSIZE_128;
> }
>
> - rctx->src_nents = qce_countsg(req->src, req->nbytes,
> - &rctx->src_chained);
> - ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE,
> - rctx->src_chained);
> + rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
sg_nents_for_len can return -EINVAL, and this error should be handled.
After added a check for the error I'm observing below:
#insmod tcrypt.ko mode=403 (test_ahash_speed("sha1"))
test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
qcrypto 73a000.crypto: sg_nents_for_len failed (-22) (nbytes:8192,
sg_len:4096)
hashing failed ret=-22
It seems that something is wrong with the test case? Looking further in
test_hash_sg_init() we can see:
#define TVMEMSIZE 4
sg_init_table(sg, TVMEMSIZE);
for (i = 0; i < TVMEMSIZE; i++) {
sg_set_buf(sg + i, tvmem[i], PAGE_SIZE);
memset(tvmem[i], 0xff, PAGE_SIZE);
}
so we have 4 SGs with sg->length = 4096, thus sg_nents_for_len() should
return 2 entries with 4096 bytes each.
What is wrong here?
> + 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 = qce_mapsg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE, 0);
> + ret = dma_map_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
> if (ret < 0)
> goto error_unmap_src;
>
<snip>
--
regards,
Stan
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