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Message-Id: <20220302211113.4003816-15-clabbe@baylibre.com> Date: Wed, 2 Mar 2022 21:11:09 +0000 From: Corentin Labbe <clabbe@...libre.com> To: heiko@...ech.de, herbert@...dor.apana.org.au, robh+dt@...nel.org Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org, john@...anate.com, Corentin Labbe <clabbe@...libre.com> Subject: [PATCH v2 14/18] crypto: rockchip: add debugfs This patch enable to access usage stats for each algorithm. Signed-off-by: Corentin Labbe <clabbe@...libre.com> --- drivers/crypto/Kconfig | 10 ++++ drivers/crypto/rockchip/rk3288_crypto.c | 47 +++++++++++++++++++ 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, 94 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 6c939214833f..04c8e332c5a1 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -797,6 +797,16 @@ 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 5eabac0ea047..cd0755731cf7 100644 --- a/drivers/crypto/rockchip/rk3288_crypto.c +++ b/drivers/crypto/rockchip/rk3288_crypto.c @@ -87,6 +87,41 @@ 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\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); + seq_printf(seq, "\tfallback due to length: %lu\n", + rk_cipher_algs[i]->stat_fb_len); + seq_printf(seq, "\tfallback due to alignment: %lu\n", + rk_cipher_algs[i]->stat_fb_align); + seq_printf(seq, "\tfallback due to SGs: %lu\n", + 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 +267,15 @@ 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 +289,9 @@ 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 d08e2438d356..8856c6226be6 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 df1c11e126dd..a8cfb520eaf8 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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