[PATCH 14/16] crypto: rockchip: add debugfs
Corentin Labbe
clabbe at baylibre.com
Mon Feb 28 11:40:35 PST 2022
This patch enable to access usage stats for each algorithm.
Signed-off-by: Corentin Labbe <clabbe at baylibre.com>
---
drivers/crypto/Kconfig | 10 +++++
drivers/crypto/rockchip/rk3288_crypto.c | 45 +++++++++++++++++++
drivers/crypto/rockchip/rk3288_crypto.h | 11 +++++
drivers/crypto/rockchip/rk3288_crypto_ahash.c | 8 ++++
.../crypto/rockchip/rk3288_crypto_skcipher.c | 19 +++++++-
5 files changed, 92 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 4f705674f94f..98e4b6c21087 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -796,6 +796,16 @@ config CRYPTO_DEV_ROCKCHIP
This driver interfaces with the hardware crypto accelerator.
Supporting cbc/ecb chainmode, and aes/des/des3_ede cipher mode.
+config CRYPTO_DEV_ROCKCHIP_DEBUG
+ bool "Enable Rockchip crypto stats"
+ depends on CRYPTO_DEV_ROCKCHIP
+ depends on DEBUG_FS
+ help
+ Say y to enable Rockchip crypto debug stats.
+ This will create /sys/kernel/debug/rk3288_crypto/stats for displaying
+ the number of requests per algorithm and other internal stats.
+
+
config CRYPTO_DEV_ZYNQMP_AES
tristate "Support for Xilinx ZynqMP AES hw accelerator"
depends on ZYNQMP_FIRMWARE || COMPILE_TEST
diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c
index 24a9e3fbf969..e342d66583d1 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.c
+++ b/drivers/crypto/rockchip/rk3288_crypto.c
@@ -87,6 +87,39 @@ static struct rk_crypto_tmp *rk_cipher_algs[] = {
&rk_ahash_md5,
};
+#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
+static int rk_crypto_debugfs_show(struct seq_file *seq, void *v)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
+ if (!rk_cipher_algs[i]->dev)
+ continue;
+ switch (rk_cipher_algs[i]->type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ seq_printf(seq, "%s %s reqs=%lu fallback=%lu fblen=%lu fbalign=%lu fbsgdiff=%lu\n",
+ rk_cipher_algs[i]->alg.skcipher.base.cra_driver_name,
+ rk_cipher_algs[i]->alg.skcipher.base.cra_name,
+ rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb,
+ rk_cipher_algs[i]->stat_fb_len,
+ rk_cipher_algs[i]->stat_fb_align,
+ rk_cipher_algs[i]->stat_fb_sgdiff
+ );
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
+ rk_cipher_algs[i]->alg.hash.halg.base.cra_driver_name,
+ rk_cipher_algs[i]->alg.hash.halg.base.cra_name,
+ rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb);
+ break;
+ }
+ }
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(rk_crypto_debugfs);
+#endif
+
static int rk_crypto_register(struct rk_crypto_info *crypto_info)
{
unsigned int i, k;
@@ -232,6 +265,15 @@ static int rk_crypto_probe(struct platform_device *pdev)
goto err_register_alg;
}
+#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
+ /* Ignore error of debugfs */
+ crypto_info->dbgfs_dir = debugfs_create_dir("rk3288_crypto", NULL);
+ crypto_info->dbgfs_stats = debugfs_create_file("stats", 0444,
+ crypto_info->dbgfs_dir,
+ crypto_info,
+ &rk_crypto_debugfs_fops);
+#endif
+
dev_info(dev, "Crypto Accelerator successfully registered\n");
return 0;
@@ -245,6 +287,9 @@ static int rk_crypto_remove(struct platform_device *pdev)
{
struct rk_crypto_info *crypto_tmp = platform_get_drvdata(pdev);
+#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
+ debugfs_remove_recursive(crypto_tmp->dbgfs_dir);
+#endif
rk_crypto_unregister();
rk_crypto_disable_clk(crypto_tmp);
return 0;
diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h
index c94ae950d2fa..e2a6d735f2e2 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.h
+++ b/drivers/crypto/rockchip/rk3288_crypto.h
@@ -7,6 +7,7 @@
#include <crypto/algapi.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/scatterlist.h>
#include <crypto/engine.h>
@@ -198,6 +199,10 @@ struct rk_crypto_info {
struct crypto_engine *engine;
struct completion complete;
int status;
+#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
+ struct dentry *dbgfs_dir;
+ struct dentry *dbgfs_stats;
+#endif
};
/* the private variable of hash */
@@ -238,6 +243,12 @@ struct rk_crypto_tmp {
struct skcipher_alg skcipher;
struct ahash_alg hash;
} alg;
+ unsigned long stat_req;
+ unsigned long stat_fb;
+ unsigned long stat_fb_len;
+ unsigned long stat_fb_sglen;
+ unsigned long stat_fb_align;
+ unsigned long stat_fb_sgdiff;
};
extern struct rk_crypto_tmp rk_ecb_aes_alg;
diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
index 87d6a03fa1bb..628ede48b868 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
@@ -39,6 +39,10 @@ static int rk_ahash_digest_fb(struct ahash_request *areq)
struct rk_ahash_rctx *rctx = ahash_request_ctx(areq);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct rk_ahash_ctx *tfmctx = crypto_ahash_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
+
+ algt->stat_fb++;
ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
rctx->fallback_req.base.flags = areq->base.flags &
@@ -249,6 +253,8 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct rk_ahash_rctx *rctx = ahash_request_ctx(areq);
struct rk_ahash_ctx *tctx = crypto_ahash_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
struct scatterlist *sg = areq->src;
int err = 0;
int i;
@@ -256,6 +262,8 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
rctx->mode = 0;
+ algt->stat_req++;
+
switch (crypto_ahash_digestsize(tfm)) {
case SHA1_DIGEST_SIZE:
rctx->mode = RK_CRYPTO_HASH_SHA1;
diff --git a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
index fe67ac6a911c..94c51e760afc 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
@@ -16,6 +16,9 @@
static int rk_cipher_need_fallback(struct skcipher_request *req)
{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
struct scatterlist *sgs, *sgd;
if (!req->cryptlen)
@@ -24,9 +27,11 @@ static int rk_cipher_need_fallback(struct skcipher_request *req)
sgs = req->src;
while (sgs) {
if (!IS_ALIGNED(sgs->offset, sizeof(u32))) {
+ algt->stat_fb_align++;
return true;
}
if (sgs->length % 16) {
+ algt->stat_fb_len++;
return true;
}
sgs = sg_next(sgs);
@@ -34,9 +39,11 @@ static int rk_cipher_need_fallback(struct skcipher_request *req)
sgd = req->dst;
while (sgd) {
if (!IS_ALIGNED(sgd->offset, sizeof(u32))) {
+ algt->stat_fb_align++;
return true;
}
if (sgd->length % 16) {
+ algt->stat_fb_len++;
return true;
}
sgd = sg_next(sgd);
@@ -44,8 +51,10 @@ static int rk_cipher_need_fallback(struct skcipher_request *req)
sgs = req->src;
sgd = req->dst;
while (sgs && sgd) {
- if (sgs->length != sgd->length)
+ if (sgs->length != sgd->length) {
+ algt->stat_fb_sgdiff++;
return true;
+ }
sgs = sg_next(sgs);
sgd = sg_next(sgd);
}
@@ -57,8 +66,12 @@ static int rk_cipher_fallback(struct skcipher_request *areq)
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
struct rk_cipher_ctx *op = crypto_skcipher_ctx(tfm);
struct rk_cipher_rctx *rctx = skcipher_request_ctx(areq);
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
int err;
+ algt->stat_fb++;
+
skcipher_request_set_tfm(&rctx->fallback_req, op->fallback_tfm);
skcipher_request_set_callback(&rctx->fallback_req, areq->base.flags,
areq->base.complete, areq->base.data);
@@ -325,6 +338,10 @@ static int rk_cipher_run(struct crypto_engine *engine, void *async_req)
u8 *ivtouse = areq->iv;
unsigned int len = areq->cryptlen;
unsigned int todo;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
+
+ algt->stat_req++;
ivsize = crypto_skcipher_ivsize(tfm);
if (areq->iv && crypto_skcipher_ivsize(tfm) > 0) {
--
2.34.1
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