From b1f578b85a13c4228d7862a203b428e774f87653 Mon Sep 17 00:00:00 2001 From: Corentin Labbe Date: Mon, 14 Dec 2020 20:02:31 +0000 Subject: crypto: sun4i-ss - enabled stats via debugfs This patch enable to access usage stats for each algorithm. Signed-off-by: Corentin Labbe Signed-off-by: Herbert Xu --- drivers/crypto/allwinner/Kconfig | 9 ++++ .../crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c | 20 +++++++++ drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 52 ++++++++++++++++++++++ drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c | 6 +++ drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c | 5 +++ drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h | 6 +++ 6 files changed, 98 insertions(+) diff --git a/drivers/crypto/allwinner/Kconfig b/drivers/crypto/allwinner/Kconfig index 180c8a9db819..856fb2045656 100644 --- a/drivers/crypto/allwinner/Kconfig +++ b/drivers/crypto/allwinner/Kconfig @@ -32,6 +32,15 @@ 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 ffa628c89e21..d5275d914d09 100644 --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c @@ -36,6 +36,8 @@ 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; @@ -52,6 +54,12 @@ 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(&ss->slock, flags); for (i = 0; i < op->keylen / 4; i++) @@ -147,6 +155,13 @@ 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(&ctx->fallback_req, op->fallback_tfm); skcipher_request_set_callback(&ctx->fallback_req, areq->base.flags, @@ -236,6 +251,11 @@ 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(&ss->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..709905ec4680 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 +235,51 @@ static struct sun4i_ss_alg_template ss_algs[] = { #endif }; +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 %s reqs=%lu tsize=%lu\n", + ss_algs[i].alg.rng.base.cra_driver_name, + ss_algs[i].alg.rng.base.cra_name, + ss_algs[i].stat_req, ss_algs[i].stat_bytes); + break; + case CRYPTO_ALG_TYPE_AHASH: + seq_printf(seq, "%s %s reqs=%lu\n", + ss_algs[i].alg.hash.halg.base.cra_driver_name, + ss_algs[i].alg.hash.halg.base.cra_name, + ss_algs[i].stat_req); + break; + } + } + return 0; +} + +static int sun4i_ss_dbgfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, sun4i_ss_dbgfs_read, inode->i_private); +} + +static const struct file_operations sun4i_ss_debugfs_fops = { + .owner = THIS_MODULE, + .open = sun4i_ss_dbgfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + /* * Power management strategy: The device is suspended unless a TFM exists for * one of the algorithms proposed by this driver. @@ -454,6 +500,12 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } + + /* Ignore error of debugfs */ + ss->dbgfs_dir = debugfs_create_dir("sun4i-ss", NULL); + ss->dbgfs_stats = debugfs_create_file("stats", 0444, ss->dbgfs_dir, ss, + &sun4i_ss_debugfs_fops); + return 0; error_alg: i--; diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c index 1dff48558f53..c1b4585e9bbc 100644 --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c @@ -191,8 +191,10 @@ static int sun4i_hash(struct ahash_request *areq) u32 spaces, rx_cnt = SS_RX_DEFAULT, bf[32] = {0}, v, ivmode = 0; struct sun4i_req_ctx *op = ahash_request_ctx(areq); struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); struct sun4i_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); struct sun4i_ss_ctx *ss = tfmctx->ss; + struct sun4i_ss_alg_template *algt; struct scatterlist *in_sg = areq->src; struct sg_mapping_iter mi; int in_r, err = 0; @@ -398,6 +400,10 @@ static int sun4i_hash(struct ahash_request *areq) */ hash_final: + if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) { + algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash); + algt->stat_req++; + } /* write the remaining words of the wait buffer */ if (op->len) { diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c index 729aafdbea84..152841076e3a 100644 --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c @@ -32,6 +32,11 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, if (err < 0) return err; + if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) { + algt->stat_req++; + algt->stat_bytes += todo; + } + spin_lock_bh(&ss->slock); writel(mode, ss->base + SS_CTL); diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h index c242fccb2ab6..0fee6f4e2d90 100644 --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h @@ -154,6 +154,8 @@ struct sun4i_ss_ctx { #ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG u32 seed[SS_SEED_LEN / BITS_PER_LONG]; #endif + struct dentry *dbgfs_dir; + struct dentry *dbgfs_stats; }; struct sun4i_ss_alg_template { @@ -165,6 +167,10 @@ struct sun4i_ss_alg_template { struct rng_alg rng; } alg; struct sun4i_ss_ctx *ss; + unsigned long stat_req; + unsigned long stat_fb; + unsigned long stat_bytes; + unsigned long stat_opti; }; struct sun4i_tfm_ctx { -- cgit v1.2.3-59-g8ed1b