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crypto: sun8i-ss - rework debugging 

The "Fallback for xxx" message is annoying, remove it and store the
information in the debugfs.
In the same time, reports more fallback statistics.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Corentin Labbe 2022-05-02 20:19:22 +00:00 committed by Herbert Xu
parent c35e523a8b
commit f95f61d0b2
4 changed files with 83 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
View File

@ -22,35 +22,54 @@
static bool sun8i_ss_need_fallback(struct skcipher_request *areq)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
struct sun8i_ss_alg_template *algt = container_of(alg, struct sun8i_ss_alg_template, alg.skcipher);
struct scatterlist *in_sg = areq->src;
struct scatterlist *out_sg = areq->dst;
struct scatterlist *sg;
if (areq->cryptlen == 0 || areq->cryptlen % 16)
if (areq->cryptlen == 0 || areq->cryptlen % 16) {
algt->stat_fb_len++;
return true;
}
if (sg_nents_for_len(areq->src, areq->cryptlen) > 8 ||
sg_nents_for_len(areq->dst, areq->cryptlen) > 8)
sg_nents_for_len(areq->dst, areq->cryptlen) > 8) {
algt->stat_fb_sgnum++;
return true;
}
sg = areq->src;
while (sg) {
if ((sg->length % 16) != 0)
if ((sg->length % 16) != 0) {
algt->stat_fb_sglen++;
return true;
if ((sg_dma_len(sg) % 16) != 0)
}
if ((sg_dma_len(sg) % 16) != 0) {
algt->stat_fb_sglen++;
return true;
if (!IS_ALIGNED(sg->offset, 16))
}
if (!IS_ALIGNED(sg->offset, 16)) {
algt->stat_fb_align++;
return true;
}
sg = sg_next(sg);
}
sg = areq->dst;
while (sg) {
if ((sg->length % 16) != 0)
if ((sg->length % 16) != 0) {
algt->stat_fb_sglen++;
return true;
if ((sg_dma_len(sg) % 16) != 0)
}
if ((sg_dma_len(sg) % 16) != 0) {
algt->stat_fb_sglen++;
return true;
if (!IS_ALIGNED(sg->offset, 16))
}
if (!IS_ALIGNED(sg->offset, 16)) {
algt->stat_fb_align++;
return true;
}
sg = sg_next(sg);
}
@ -385,9 +404,9 @@ int sun8i_ss_cipher_init(struct crypto_tfm *tfm)
crypto_skcipher_reqsize(op->fallback_tfm);
dev_info(op->ss->dev, "Fallback for %s is %s\n",
crypto_tfm_alg_driver_name(&sktfm->base),
crypto_tfm_alg_driver_name(crypto_skcipher_tfm(op->fallback_tfm)));
memcpy(algt->fbname,
crypto_tfm_alg_driver_name(crypto_skcipher_tfm(op->fallback_tfm)),
CRYPTO_MAX_ALG_NAME);
op->enginectx.op.do_one_request = sun8i_ss_handle_cipher_request;
op->enginectx.op.prepare_request = NULL;

21
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
View File

@ -430,6 +430,17 @@ static int sun8i_ss_debugfs_show(struct seq_file *seq, void *v)
ss_algs[i].alg.skcipher.base.cra_driver_name,
ss_algs[i].alg.skcipher.base.cra_name,
ss_algs[i].stat_req, ss_algs[i].stat_fb);
seq_printf(seq, "\tLast fallback is: %s\n",
ss_algs[i].fbname);
seq_printf(seq, "\tFallback due to length: %lu\n",
ss_algs[i].stat_fb_len);
seq_printf(seq, "\tFallback due to SG length: %lu\n",
ss_algs[i].stat_fb_sglen);
seq_printf(seq, "\tFallback due to alignment: %lu\n",
ss_algs[i].stat_fb_align);
seq_printf(seq, "\tFallback due to SG numbers: %lu\n",
ss_algs[i].stat_fb_sgnum);
break;
case CRYPTO_ALG_TYPE_RNG:
seq_printf(seq, "%s %s reqs=%lu tsize=%lu\n",
@ -442,6 +453,16 @@ static int sun8i_ss_debugfs_show(struct seq_file *seq, void *v)
ss_algs[i].alg.hash.halg.base.cra_driver_name,
ss_algs[i].alg.hash.halg.base.cra_name,
ss_algs[i].stat_req, ss_algs[i].stat_fb);
seq_printf(seq, "\tLast fallback is: %s\n",
ss_algs[i].fbname);
seq_printf(seq, "\tFallback due to length: %lu\n",
ss_algs[i].stat_fb_len);
seq_printf(seq, "\tFallback due to SG length: %lu\n",
ss_algs[i].stat_fb_sglen);
seq_printf(seq, "\tFallback due to alignment: %lu\n",
ss_algs[i].stat_fb_align);
seq_printf(seq, "\tFallback due to SG numbers: %lu\n",
ss_algs[i].stat_fb_sgnum);
break;
}
}

36
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
View File

@ -51,9 +51,8 @@ int sun8i_ss_hash_crainit(struct crypto_tfm *tfm)
sizeof(struct sun8i_ss_hash_reqctx) +
crypto_ahash_reqsize(op->fallback_tfm));
dev_info(op->ss->dev, "Fallback for %s is %s\n",
crypto_tfm_alg_driver_name(tfm),
crypto_tfm_alg_driver_name(&op->fallback_tfm->base));
memcpy(algt->fbname, crypto_tfm_alg_driver_name(&op->fallback_tfm->base), CRYPTO_MAX_ALG_NAME);
err = pm_runtime_get_sync(op->ss->dev);
if (err < 0)
goto error_pm;
@ -259,16 +258,29 @@ static int sun8i_ss_run_hash_task(struct sun8i_ss_dev *ss,
static bool sun8i_ss_hash_need_fallback(struct ahash_request *areq)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
struct sun8i_ss_alg_template *algt;
struct scatterlist *sg;
if (areq->nbytes == 0)
algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
if (areq->nbytes == 0) {
algt->stat_fb_len++;
return true;
if (areq->nbytes >= MAX_PAD_SIZE - 64)
}
if (areq->nbytes >= MAX_PAD_SIZE - 64) {
algt->stat_fb_len++;
return true;
}
/* we need to reserve one SG for the padding one */
if (sg_nents(areq->src) > MAX_SG - 1)
if (sg_nents(areq->src) > MAX_SG - 1) {
algt->stat_fb_sgnum++;
return true;
}
sg = areq->src;
while (sg) {
/* SS can operate hash only on full block size
@ -276,12 +288,18 @@ static bool sun8i_ss_hash_need_fallback(struct ahash_request *areq)
* is always 64
*/
/* Only the last block could be bounced to the pad buffer */
if (sg->length % 64 && sg_next(sg))
if (sg->length % 64 && sg_next(sg)) {
algt->stat_fb_sglen++;
return true;
if (!IS_ALIGNED(sg->offset, sizeof(u32)))
}
if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
algt->stat_fb_align++;
return true;
if (sg->length % 4)
}
if (sg->length % 4) {
algt->stat_fb_sglen++;
return true;
}
sg = sg_next(sg);
}
return false;

7
drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h
View File

@ -279,11 +279,14 @@ struct sun8i_ss_alg_template {
struct rng_alg rng;
struct ahash_alg hash;
} alg;
#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
unsigned long stat_req;
unsigned long stat_fb;
unsigned long stat_bytes;
#endif
unsigned long stat_fb_len;
unsigned long stat_fb_sglen;
unsigned long stat_fb_align;
unsigned long stat_fb_sgnum;
char fbname[CRYPTO_MAX_ALG_NAME];
};
int sun8i_ss_enqueue(struct crypto_async_request *areq, u32 type);