This patch enable to access usage stats for each algorithm.
Signed-off-by: Corentin Labbe
---
drivers/crypto/allwinner/Kconfig | 9 +++
.../allwinner/sun4i-ss/sun4i-ss-cipher.c | 20 +++
.../crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 56 +++
.../crypto/allwinner/sun4i-ss/sun4i-ss-hash.c | 6 ++
.../crypto/allwinner/sun4i-ss/sun4i-ss-prng.c | 5 ++
drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h | 6 ++
6 files changed, 102 insertions(+)
diff --git a/drivers/crypto/allwinner/Kconfig b/drivers/crypto/allwinner/Kconfig
index 0e72543ad1f1..e9b7f7e3d307 100644
--- a/drivers/crypto/allwinner/Kconfig
+++ b/drivers/crypto/allwinner/Kconfig
@@ -51,6 +51,15 @@ config CRYPTO_DEV_SUN4I_SS_PRNG
Select this option if you want to provide kernel-side support for
the Pseudo-Random Number Generator found in the Security System.
+config CRYPTO_DEV_SUN4I_SS_DEBUG
+ bool "Enable sun4i-ss stats"
+ depends on CRYPTO_DEV_SUN4I_SS
+ depends on DEBUG_FS
+ help
+ Say y to enable sun4i-ss debug stats.
+ This will create /sys/kernel/debug/sun4i-ss/stats for displaying
+ the number of requests per algorithm.
+
config CRYPTO_DEV_SUN8I_CE
tristate "Support for Allwinner Crypto Engine cryptographic offloader"
select CRYPTO_SKCIPHER
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
index 7f4c97cc9627..5af404f74a98 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
@@ -34,6 +34,8 @@ static int noinline_for_stack sun4i_ss_opti_poll(struct
skcipher_request *areq)
struct sg_mapping_iter mi, mo;
unsigned int oi, oo; /* offset for in and out */
unsigned long flags;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sun4i_ss_alg_template *algt;
if (!areq->cryptlen)
return 0;
@@ -50,6 +52,12 @@ static int noinline_for_stack sun4i_ss_opti_poll(struct
skcipher_request *areq)
scatterwalk_map_and_copy(backup_iv, areq->src, areq->cryptlen -
ivsize, ivsize, 0);
}
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt = container_of(alg, struct sun4i_ss_alg_template,
alg.crypto);
+ algt->stat_opti++;
+ algt->stat_bytes += areq->cryptlen;
+ }
+
spin_lock_irqsave(>slock, flags);
for (i = 0; i < op->keylen / 4; i++)
@@ -134,6 +142,13 @@ static int noinline_for_stack
sun4i_ss_cipher_poll_fallback(struct skcipher_requ
struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
struct sun4i_cipher_req_ctx *ctx = skcipher_request_ctx(areq);
int err;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sun4i_ss_alg_template *algt;
+
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt = container_of(alg, struct sun4i_ss_alg_template,
alg.crypto);
+ algt->stat_fb++;
+ }
skcipher_request_set_tfm(>fallback_req, op->fallback_tfm);
skcipher_request_set_callback(>fallback_req, areq->base.flags,
@@ -221,6 +236,11 @@ static int sun4i_ss_cipher_poll(struct skcipher_request
*areq)
scatterwalk_map_and_copy(backup_iv, areq->src, areq->cryptlen -
ivsize, ivsize, 0);
}
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt->stat_req++;
+ algt->stat_bytes += areq->cryptlen;
+ }
+
spin_lock_irqsave(>slock, flags);
for (i = 0; i < op->keylen / 4; i++)
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
index a2b67f7f8a81..9a8a5e246d87 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
@@ -10,6 +10,7 @@
*/
#include
#include
+#include
#include
#include
#include
@@ -234,6 +235,53 @@ static struct sun4i_ss_alg_template ss_algs[] = {
#endif
};
+#ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG
+static int sun4i_ss_dbgfs_read(struct seq_file *seq, void *v)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
+ if (!ss_algs[i].ss)
+ continue;
+ switch (ss_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ seq_printf(seq, "%s %s reqs=%lu opti=%lu fallback=%lu
tsize=%lu\n",
+ ss_algs[i].alg.crypto.base.cra_driver_name,
+ ss_algs[i].alg.crypto.base.cra_name,
+ ss_algs[i].stat_req, ss_algs[i].stat_opti,
ss_algs[i].stat_fb,
+ ss_algs[i].stat_bytes);
+ break;
+ case CRYPTO_ALG_TYPE_RNG:
+ seq_printf(seq, "%s
