Commit b1f578b8 authored by Corentin Labbe's avatar Corentin Labbe Committed by Herbert Xu
Browse files

crypto: sun4i-ss - enabled stats via debugfs 



This patch enable to access usage stats for each algorithm.

Signed-off-by: default avatarCorentin Labbe <clabbe@baylibre.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 9bc3dd24

drivers/crypto/allwinner/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -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

drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c

+20 −0
Original line number Diff line number Diff line
@@ -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++)

drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c

+52 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
 */

#include <linux/clk.h>

#include <linux/crypto.h>

#include <linux/debugfs.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of.h>
@@ -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--;

drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c

+6 −0
Original line number Diff line number Diff line
@@ -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) {

drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c

+5 −0
Original line number Diff line number Diff line
@@ -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);