diff options
Diffstat (limited to 'drivers/crypto/allwinner/sun8i-ss')
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/Makefile | 2 | ||||
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c | 16 | ||||
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c | 229 | ||||
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 444 | ||||
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c | 173 | ||||
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h | 89 |
6 files changed, 915 insertions, 38 deletions
diff --git a/drivers/crypto/allwinner/sun8i-ss/Makefile b/drivers/crypto/allwinner/sun8i-ss/Makefile index add7b0543fd5..aabfd893c817 100644 --- a/drivers/crypto/allwinner/sun8i-ss/Makefile +++ b/drivers/crypto/allwinner/sun8i-ss/Makefile @@ -1,2 +1,4 @@ obj-$(CONFIG_CRYPTO_DEV_SUN8I_SS) += sun8i-ss.o sun8i-ss-y += sun8i-ss-core.o sun8i-ss-cipher.o +sun8i-ss-$(CONFIG_CRYPTO_DEV_SUN8I_SS_PRNG) += sun8i-ss-prng.o +sun8i-ss-$(CONFIG_CRYPTO_DEV_SUN8I_SS_HASH) += sun8i-ss-hash.o diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c index 7b39b4495571..ed2a69f82e1c 100644 --- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c @@ -248,7 +248,6 @@ theend_iv: offset = areq->cryptlen - ivsize; if (rctx->op_dir & SS_DECRYPTION) { memcpy(areq->iv, backup_iv, ivsize); - memzero_explicit(backup_iv, ivsize); kfree_sensitive(backup_iv); } else { scatterwalk_map_and_copy(areq->iv, areq->dst, offset, @@ -368,10 +367,7 @@ void sun8i_ss_cipher_exit(struct crypto_tfm *tfm) { struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm); - if (op->key) { - memzero_explicit(op->key, op->keylen); - kfree(op->key); - } + kfree_sensitive(op->key); crypto_free_skcipher(op->fallback_tfm); pm_runtime_put_sync(op->ss->dev); } @@ -393,10 +389,7 @@ int sun8i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, dev_dbg(ss->dev, "ERROR: Invalid keylen %u\n", keylen); return -EINVAL; } - if (op->key) { - memzero_explicit(op->key, op->keylen); - kfree(op->key); - } + kfree_sensitive(op->key); op->keylen = keylen; op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA); if (!op->key) @@ -419,10 +412,7 @@ int sun8i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, return -EINVAL; } - if (op->key) { - memzero_explicit(op->key, op->keylen); - kfree(op->key); - } + kfree_sensitive(op->key); op->keylen = keylen; op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA); if (!op->key) diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c index 9a23515783a6..e0ddc684798d 100644 --- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c @@ -22,6 +22,7 @@ #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> +#include <crypto/internal/rng.h> #include <crypto/internal/skcipher.h> #include "sun8i-ss.h" @@ -40,6 +41,8 @@ static const struct ss_variant ss_a80_variant = { static const struct ss_variant ss_a83t_variant = { .alg_cipher = { SS_ALG_AES, SS_ALG_DES, SS_ALG_3DES, }, + .alg_hash = { SS_ALG_MD5, SS_ALG_SHA1, SS_ALG_SHA224, SS_ALG_SHA256, + }, .op_mode = { SS_OP_ECB, SS_OP_CBC, }, .ss_clks = { @@ -61,7 +64,7 @@ int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx const char *name) { int flow = rctx->flow; - u32 v = 1; + u32 v = SS_START; int i; #ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG @@ -264,13 +267,154 @@ static struct sun8i_ss_alg_template ss_algs[] = { .decrypt = sun8i_ss_skdecrypt, } }, +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_PRNG +{ + .type = CRYPTO_ALG_TYPE_RNG, + .alg.rng = { + .base = { + .cra_name = "stdrng", + .cra_driver_name = "sun8i-ss-prng", + .cra_priority = 300, + .cra_ctxsize = sizeof(struct sun8i_ss_rng_tfm_ctx), + .cra_module = THIS_MODULE, + .cra_init = sun8i_ss_prng_init, + .cra_exit = sun8i_ss_prng_exit, + }, + .generate = sun8i_ss_prng_generate, + .seed = sun8i_ss_prng_seed, + .seedsize = PRNG_SEED_SIZE, + } +}, +#endif +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_HASH +{ .type = CRYPTO_ALG_TYPE_AHASH, + .ss_algo_id = SS_ID_HASH_MD5, + .alg.hash = { + .init = sun8i_ss_hash_init, + .update = sun8i_ss_hash_update, + .final = sun8i_ss_hash_final, + .finup = sun8i_ss_hash_finup, + .digest = sun8i_ss_hash_digest, + .export = sun8i_ss_hash_export, + .import = sun8i_ss_hash_import, + .halg = { + .digestsize = MD5_DIGEST_SIZE, + .statesize = sizeof(struct md5_state), + .base = { + .cra_name = "md5", + .cra_driver_name = "md5-sun8i-ss", + .cra_priority = 300, + .cra_alignmask = 3, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = MD5_HMAC_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), + .cra_module = THIS_MODULE, + .cra_init = sun8i_ss_hash_crainit, + .cra_exit = sun8i_ss_hash_craexit, + } + } + } +}, +{ .type = CRYPTO_ALG_TYPE_AHASH, + .ss_algo_id = SS_ID_HASH_SHA1, + .alg.hash = { + .init = sun8i_ss_hash_init, + .update = sun8i_ss_hash_update, + .final = sun8i_ss_hash_final, + .finup = sun8i_ss_hash_finup, + .digest = sun8i_ss_hash_digest, + .export = sun8i_ss_hash_export, + .import = sun8i_ss_hash_import, + .halg = { + .digestsize = SHA1_DIGEST_SIZE, + .statesize = sizeof(struct sha1_state), + .base = { + .cra_name = "sha1", + .cra_driver_name = "sha1-sun8i-ss", + .cra_priority = 300, + .cra_alignmask = 3, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), + .cra_module = THIS_MODULE, + .cra_init = sun8i_ss_hash_crainit, + .cra_exit = sun8i_ss_hash_craexit, + } + } + } +}, +{ .type = CRYPTO_ALG_TYPE_AHASH, + .ss_algo_id = SS_ID_HASH_SHA224, + .alg.hash = { + .init = sun8i_ss_hash_init, + .update = sun8i_ss_hash_update, + .final = sun8i_ss_hash_final, + .finup = sun8i_ss_hash_finup, + .digest = sun8i_ss_hash_digest, + .export = sun8i_ss_hash_export, + .import = sun8i_ss_hash_import, + .halg = { + .digestsize = SHA224_DIGEST_SIZE, + .statesize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha224", + .cra_driver_name = "sha224-sun8i-ss", + .cra_priority = 300, + .cra_alignmask = 3, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), + .cra_module = THIS_MODULE, + .cra_init = sun8i_ss_hash_crainit, + .cra_exit = sun8i_ss_hash_craexit, + } + } + } +}, +{ .type = CRYPTO_ALG_TYPE_AHASH, + .ss_algo_id = SS_ID_HASH_SHA256, + .alg.hash = { + .init = sun8i_ss_hash_init, + .update = sun8i_ss_hash_update, + .final = sun8i_ss_hash_final, + .finup = sun8i_ss_hash_finup, + .digest = sun8i_ss_hash_digest, + .export = sun8i_ss_hash_export, + .import = sun8i_ss_hash_import, + .halg = { + .digestsize = SHA256_DIGEST_SIZE, + .statesize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha256", + .cra_driver_name = "sha256-sun8i-ss", + .cra_priority = 300, + .cra_alignmask = 3, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), + .cra_module = THIS_MODULE, + .cra_init = sun8i_ss_hash_crainit, + .cra_exit = sun8i_ss_hash_craexit, + } + } + } +}, +#endif }; #ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG -static int sun8i_ss_dbgfs_read(struct seq_file *seq, void *v) +static int sun8i_ss_debugfs_show(struct seq_file *seq, void *v) { struct sun8i_ss_dev *ss = seq->private; - int i; + unsigned int i; for (i = 0; i < MAXFLOW; i++) seq_printf(seq, "Channel %d: nreq %lu\n", i, ss->flows[i].stat_req); @@ -280,28 +424,29 @@ static int sun8i_ss_dbgfs_read(struct seq_file *seq, void *v) continue; switch (ss_algs[i].type) { case CRYPTO_ALG_TYPE_SKCIPHER: - seq_printf(seq, "%s %s %lu %lu\n", + seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n", ss_algs[i].alg.skcipher.base.cra_driver_name, ss_algs[i].alg.skcipher.base.cra_name, ss_algs[i].stat_req, ss_algs[i].stat_fb); 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 fallback=%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, ss_algs[i].stat_fb); + break; } } return 0; } -static int sun8i_ss_dbgfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, sun8i_ss_dbgfs_read, inode->i_private); -} - -static const struct file_operations sun8i_ss_debugfs_fops = { - .owner = THIS_MODULE, - .open = sun8i_ss_dbgfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(sun8i_ss_debugfs); #endif static void sun8i_ss_free_flows(struct sun8i_ss_dev *ss, int i) @@ -415,7 +560,8 @@ static void sun8i_ss_pm_exit(struct sun8i_ss_dev *ss) static int sun8i_ss_register_algs(struct sun8i_ss_dev *ss) { - int ss_method, err, id, i; + int ss_method, err, id; + unsigned int i; for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { ss_algs[i].ss = ss; @@ -448,6 +594,34 @@ static int sun8i_ss_register_algs(struct sun8i_ss_dev *ss) return err; } break; + case CRYPTO_ALG_TYPE_RNG: + err = crypto_register_rng(&ss_algs[i].alg.rng); + if (err) { + dev_err(ss->dev, "Fail to register %s\n", + ss_algs[i].alg.rng.base.cra_name); + ss_algs[i].ss = NULL; + } + break; + case CRYPTO_ALG_TYPE_AHASH: + id = ss_algs[i].ss_algo_id; + ss_method = ss->variant->alg_hash[id]; + if (ss_method == SS_ID_NOTSUPP) { + dev_info(ss->dev, + "DEBUG: Algo of %s not supported\n", + ss_algs[i].alg.hash.halg.base.cra_name); + ss_algs[i].ss = NULL; + break; + } + dev_info(ss->dev, "Register %s\n", + ss_algs[i].alg.hash.halg.base.cra_name); + err = crypto_register_ahash(&ss_algs[i].alg.hash); + if (err) { + dev_err(ss->dev, "ERROR: Fail to register %s\n", + ss_algs[i].alg.hash.halg.base.cra_name); + ss_algs[i].ss = NULL; + return err; + } + break; default: ss_algs[i].ss = NULL; dev_err(ss->dev, "ERROR: tried to register an unknown algo\n"); @@ -458,7 +632,7 @@ static int sun8i_ss_register_algs(struct sun8i_ss_dev *ss) static void sun8i_ss_unregister_algs(struct sun8i_ss_dev *ss) { - int i; + unsigned int i; for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { if (!ss_algs[i].ss) @@ -469,6 +643,16 @@ static void sun8i_ss_unregister_algs(struct sun8i_ss_dev *ss) ss_algs[i].alg.skcipher.base.cra_name); crypto_unregister_skcipher(&ss_algs[i].alg.skcipher); break; + case CRYPTO_ALG_TYPE_RNG: + dev_info(ss->dev, "Unregister %d %s\n", i, + ss_algs[i].alg.rng.base.cra_name); + crypto_unregister_rng(&ss_algs[i].alg.rng); + break; + case CRYPTO_ALG_TYPE_AHASH: + dev_info(ss->dev, "Unregister %d %s\n", i, + ss_algs[i].alg.hash.halg.base.cra_name); + crypto_unregister_ahash(&ss_algs[i].alg.hash); + break; } } } @@ -545,12 +729,9 @@ static int sun8i_ss_probe(struct platform_device *pdev) return irq; ss->reset = devm_reset_control_get(&pdev->dev, NULL); - if (IS_ERR(ss->reset)) { - if (PTR_ERR(ss->reset) == -EPROBE_DEFER) - return PTR_ERR(ss->reset); - dev_err(&pdev->dev, "No reset control found\n"); - return PTR_ERR(ss->reset); - } + if (IS_ERR(ss->reset)) + return dev_err_probe(&pdev->dev, PTR_ERR(ss->reset), + "No reset control found\n"); mutex_init(&ss->mlock); diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c new file mode 100644 index 000000000000..b6ab2054f217 --- /dev/null +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c @@ -0,0 +1,444 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * sun8i-ss-hash.c - hardware cryptographic offloader for + * Allwinner A80/A83T SoC + * + * Copyright (C) 2015-2020 Corentin Labbe <clabbe@baylibre.com> + * + * This file add support for MD5 and SHA1/SHA224/SHA256. + * + * You could find the datasheet in Documentation/arm/sunxi.rst + */ +#include <linux/dma-mapping.h> +#include <linux/pm_runtime.h> +#include <linux/scatterlist.h> +#include <crypto/internal/hash.h> +#include <crypto/sha.h> +#include <crypto/md5.h> +#include "sun8i-ss.h" + +int sun8i_ss_hash_crainit(struct crypto_tfm *tfm) +{ + struct sun8i_ss_hash_tfm_ctx *op = crypto_tfm_ctx(tfm); + struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg); + struct sun8i_ss_alg_template *algt; + int err; + + memset(op, 0, sizeof(struct sun8i_ss_hash_tfm_ctx)); + + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + op->ss = algt->ss; + + op->enginectx.op.do_one_request = sun8i_ss_hash_run; + op->enginectx.op.prepare_request = NULL; + op->enginectx.op.unprepare_request = NULL; + + /* FALLBACK */ + op->fallback_tfm = crypto_alloc_ahash(crypto_tfm_alg_name(tfm), 0, + CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(op->fallback_tfm)) { + dev_err(algt->ss->dev, "Fallback driver could no be loaded\n"); + return PTR_ERR(op->fallback_tfm); + } + + if (algt->alg.hash.halg.statesize < crypto_ahash_statesize(op->fallback_tfm)) + algt->alg.hash.halg.statesize = crypto_ahash_statesize(op->fallback_tfm); + + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct sun8i_ss_hash_reqctx) + + crypto_ahash_reqsize(op->fallback_tfm)); + + dev_info(op->ss->dev, "Fallback for %s is %s\n", + crypto_tfm_alg_driver_name(tfm), + crypto_tfm_alg_driver_name(&op->fallback_tfm->base)); + err = pm_runtime_get_sync(op->ss->dev); + if (err < 0) + goto error_pm; + return 0; +error_pm: + pm_runtime_put_noidle(op->ss->dev); + crypto_free_ahash(op->fallback_tfm); + return err; +} + +void sun8i_ss_hash_craexit(struct crypto_tfm *tfm) +{ + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_tfm_ctx(tfm); + + crypto_free_ahash(tfmctx->fallback_tfm); + pm_runtime_put_sync_suspend(tfmctx->ss->dev); +} + +int sun8i_ss_hash_init(struct ahash_request *areq) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); + + memset(rctx, 0, sizeof(struct sun8i_ss_hash_reqctx)); + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; + + return crypto_ahash_init(&rctx->fallback_req); +} + +int sun8i_ss_hash_export(struct ahash_request *areq, void *out) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; + + return crypto_ahash_export(&rctx->fallback_req, out); +} + +int sun8i_ss_hash_import(struct ahash_request *areq, const void *in) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; + + return crypto_ahash_import(&rctx->fallback_req, in); +} + +int sun8i_ss_hash_final(struct ahash_request *areq) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); + struct sun8i_ss_alg_template *algt; +#endif + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & + CRYPTO_TFM_REQ_MAY_SLEEP; + rctx->fallback_req.result = areq->result; + +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + algt->stat_fb++; +#endif + + return crypto_ahash_final(&rctx->fallback_req); +} + +int sun8i_ss_hash_update(struct ahash_request *areq) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & + CRYPTO_TFM_REQ_MAY_SLEEP; + rctx->fallback_req.nbytes = areq->nbytes; + rctx->fallback_req.src = areq->src; + + return crypto_ahash_update(&rctx->fallback_req); +} + +int sun8i_ss_hash_finup(struct ahash_request *areq) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); + struct sun8i_ss_alg_template *algt; +#endif + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & + CRYPTO_TFM_REQ_MAY_SLEEP; + + rctx->fallback_req.nbytes = areq->nbytes; + rctx->fallback_req.src = areq->src; + rctx->fallback_req.result = areq->result; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + algt->stat_fb++; +#endif + + return crypto_ahash_finup(&rctx->fallback_req); +} + +static int sun8i_ss_hash_digest_fb(struct ahash_request *areq) +{ + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm); +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); + struct sun8i_ss_alg_template *algt; +#endif + + ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm); + rctx->fallback_req.base.flags = areq->base.flags & + CRYPTO_TFM_REQ_MAY_SLEEP; + + rctx->fallback_req.nbytes = areq->nbytes; + rctx->fallback_req.src = areq->src; + rctx->fallback_req.result = areq->result; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + algt->stat_fb++; +#endif + + return crypto_ahash_digest(&rctx->fallback_req); +} + +static int sun8i_ss_run_hash_task(struct sun8i_ss_dev *ss, + struct sun8i_ss_hash_reqctx *rctx, + const char *name) +{ + int flow = rctx->flow; + u32 v = SS_START; + int i; + +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + ss->flows[flow].stat_req++; +#endif + + /* choose between stream0/stream1 */ + if (flow) + v |= SS_FLOW1; + else + v |= SS_FLOW0; + + v |= rctx->method; + + for (i = 0; i < MAX_SG; i++) { + if (!rctx->t_dst[i].addr) + break; + + mutex_lock(&ss->mlock); + if (i > 0) { + v |= BIT(17); + writel(rctx->t_dst[i - 1].addr, ss->base + SS_KEY_ADR_REG); + writel(rctx->t_dst[i - 1].addr, ss->base + SS_IV_ADR_REG); + } + + dev_dbg(ss->dev, + "Processing SG %d on flow %d %s ctl=%x %d to %d method=%x src=%x dst=%x\n", + i, flow, name, v, + rctx->t_src[i].len, rctx->t_dst[i].len, + rctx->method, rctx->t_src[i].addr, rctx->t_dst[i].addr); + + writel(rctx->t_src[i].addr, ss->base + SS_SRC_ADR_REG); + writel(rctx->t_dst[i].addr, ss->base + SS_DST_ADR_REG); + writel(rctx->t_src[i].len, ss->base + SS_LEN_ADR_REG); + writel(BIT(0) | BIT(1), ss->base + SS_INT_CTL_REG); + + reinit_completion(&ss->flows[flow].complete); + ss->flows[flow].status = 0; + wmb(); + + writel(v, ss->base + SS_CTL_REG); + mutex_unlock(&ss->mlock); + wait_for_completion_interruptible_timeout(&ss->flows[flow].complete, + msecs_to_jiffies(2000)); + if (ss->flows[flow].status == 0) { + dev_err(ss->dev, "DMA timeout for %s\n", name); + return -EFAULT; + } + } + + return 0; +} + +static bool sun8i_ss_hash_need_fallback(struct ahash_request *areq) +{ + struct scatterlist *sg; + + if (areq->nbytes == 0) + return true; + /* we need to reserve one SG for the padding one */ + if (sg_nents(areq->src) > MAX_SG - 1) + return true; + sg = areq->src; + while (sg) { + /* SS can operate hash only on full block size + * since SS support only MD5,sha1,sha224 and sha256, blocksize + * is always 64 + * TODO: handle request if last SG is not len%64 + * but this will need to copy data on a new SG of size=64 + */ + if (sg->length % 64 || !IS_ALIGNED(sg->offset, sizeof(u32))) + return true; + sg = sg_next(sg); + } + return false; +} + +int sun8i_ss_hash_digest(struct ahash_request *areq) +{ + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct sun8i_ss_alg_template *algt; + struct sun8i_ss_dev *ss; + struct crypto_engine *engine; + struct scatterlist *sg; + int nr_sgs, e, i; + + if (sun8i_ss_hash_need_fallback(areq)) + return sun8i_ss_hash_digest_fb(areq); + + nr_sgs = sg_nents(areq->src); + if (nr_sgs > MAX_SG - 1) + return sun8i_ss_hash_digest_fb(areq); + + for_each_sg(areq->src, sg, nr_sgs, i) { + if (sg->length % 4 || !IS_ALIGNED(sg->offset, sizeof(u32))) + return sun8i_ss_hash_digest_fb(areq); + } + + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + ss = algt->ss; + + e = sun8i_ss_get_engine_number(ss); + rctx->flow = e; + engine = ss->flows[e].engine; + + return crypto_transfer_hash_request_to_engine(engine, areq); +} + +/* sun8i_ss_hash_run - run an ahash request + * Send the data of the request to the SS along with an extra SG with padding + */ +int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq) +{ + struct ahash_request *areq = container_of(breq, struct ahash_request, base); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); + struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg); + struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq); + struct sun8i_ss_alg_template *algt; + struct sun8i_ss_dev *ss; + struct scatterlist *sg; + int nr_sgs, err, digestsize; + unsigned int len; + u64 fill, min_fill, byte_count; + void *pad, *result; + int j, i, todo; + __be64 *bebits; + __le64 *lebits; + dma_addr_t addr_res, addr_pad; + __le32 *bf; + + algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash); + ss = algt->ss; + + digestsize = algt->alg.hash.halg.digestsize; + if (digestsize == SHA224_DIGEST_SIZE) + digestsize = SHA256_DIGEST_SIZE; + + /* the padding could be up to two block. */ + pad = kzalloc(algt->alg.hash.halg.base.cra_blocksize * 2, GFP_KERNEL | GFP_DMA); + if (!pad) + return -ENOMEM; + bf = (__le32 *)pad; + + result = kzalloc(digestsize, GFP_KERNEL | GFP_DMA); + if (!result) + return -ENOMEM; + + for (i = 0; i < MAX_SG; i++) { + rctx->t_dst[i].addr = 0; + rctx->t_dst[i].len = 0; + } + +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + algt->stat_req++; +#endif + + rctx->method = ss->variant->alg_hash[algt->ss_algo_id]; + + nr_sgs = dma_map_sg(ss->dev, areq->src, sg_nents(areq->src), DMA_TO_DEVICE); + if (nr_sgs <= 0 || nr_sgs > MAX_SG) { + dev_err(ss->dev, "Invalid sg number %d\n", nr_sgs); + err = -EINVAL; + goto theend; + } + + addr_res = dma_map_single(ss->dev, result, digestsize, DMA_FROM_DEVICE); + if (dma_mapping_error(ss->dev, addr_res)) { + dev_err(ss->dev, "DMA map dest\n"); + err = -EINVAL; + goto theend; + } + + len = areq->nbytes; + for_each_sg(areq->src, sg, nr_sgs, i) { + rctx->t_src[i].addr = sg_dma_address(sg); + todo = min(len, sg_dma_len(sg)); + rctx->t_src[i].len = todo / 4; + len -= todo; + rctx->t_dst[i].addr = addr_res; + rctx->t_dst[i].len = digestsize / 4; + } + if (len > 0) { + dev_err(ss->dev, "remaining len %d\n", len); + err = -EINVAL; + goto theend; + } + + byte_count = areq->nbytes; + j = 0; + bf[j++] = cpu_to_le32(0x80); + + fill = 64 - (byte_count % 64); + min_fill = 3 * sizeof(u32); + + if (fill < min_fill) + fill += 64; + + j += (fill - min_fill) / sizeof(u32); + + switch (algt->ss_algo_id) { + case SS_ID_HASH_MD5: + lebits = (__le64 *)&bf[j]; + *lebits = cpu_to_le64(byte_count << 3); + j += 2; + break; + case SS_ID_HASH_SHA1: + case SS_ID_HASH_SHA224: + case SS_ID_HASH_SHA256: + bebits = (__be64 *)&bf[j]; + *bebits = cpu_to_be64(byte_count << 3); + j += 2; + break; + } + + addr_pad = dma_map_single(ss->dev, pad, j * 4, DMA_TO_DEVICE); + rctx->t_src[i].addr = addr_pad; + rctx->t_src[i].len = j; + rctx->t_dst[i].addr = addr_res; + rctx->t_dst[i].len = digestsize / 4; + if (dma_mapping_error(ss->dev, addr_pad)) { + dev_err(ss->dev, "DMA error on padding SG\n"); + err = -EINVAL; + goto theend; + } + + err = sun8i_ss_run_hash_task(ss, rctx, crypto_tfm_alg_name(areq->base.tfm)); + + dma_unmap_single(ss->dev, addr_pad, j * 4, DMA_TO_DEVICE); + dma_unmap_sg(ss->dev, areq->src, nr_sgs, DMA_TO_DEVICE); + dma_unmap_single(ss->dev, addr_res, digestsize, DMA_FROM_DEVICE); + + kfree(pad); + + memcpy(areq->result, result, algt->alg.hash.halg.digestsize); + kfree(result); +theend: + crypto_finalize_hash_request(engine, breq, err); + return 0; +} diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c new file mode 100644 index 000000000000..08a1473b2145 --- /dev/null +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * sun8i-ss-prng.c - hardware cryptographic offloader for + * Allwinner A80/A83T SoC + * + * Copyright (C) 2015-2020 Corentin Labbe <clabbe@baylibre.com> + * + * This file handle the PRNG found in the SS + * + * You could find a link for the datasheet in Documentation/arm/sunxi.rst + */ +#include "sun8i-ss.h" +#include <linux/dma-mapping.h> +#include <linux/pm_runtime.h> +#include <crypto/internal/rng.h> + +int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, + unsigned int slen) +{ + struct sun8i_ss_rng_tfm_ctx *ctx = crypto_rng_ctx(tfm); + + if (ctx->seed && ctx->slen != slen) { + memzero_explicit(ctx->seed, ctx->slen); + kfree(ctx->seed); + ctx->slen = 0; + ctx->seed = NULL; + } + if (!ctx->seed) + ctx->seed = kmalloc(slen, GFP_KERNEL | GFP_DMA); + if (!ctx->seed) + return -ENOMEM; + + memcpy(ctx->seed, seed, slen); + ctx->slen = slen; + + return 0; +} + +int sun8i_ss_prng_init(struct crypto_tfm *tfm) +{ + struct sun8i_ss_rng_tfm_ctx *ctx = crypto_tfm_ctx(tfm); + + memset(ctx, 0, sizeof(struct sun8i_ss_rng_tfm_ctx)); + return 0; +} + +void sun8i_ss_prng_exit(struct crypto_tfm *tfm) +{ + struct sun8i_ss_rng_tfm_ctx *ctx = crypto_tfm_ctx(tfm); + + memzero_explicit(ctx->seed, ctx->slen); + kfree(ctx->seed); + ctx->seed = NULL; + ctx->slen = 0; +} + +int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int dlen) +{ + struct sun8i_ss_rng_tfm_ctx *ctx = crypto_rng_ctx(tfm); + struct rng_alg *alg = crypto_rng_alg(tfm); + struct sun8i_ss_alg_template *algt; + struct sun8i_ss_dev *ss; + dma_addr_t dma_iv, dma_dst; + unsigned int todo; + int err = 0; + int flow; + void *d; + u32 v; + + algt = container_of(alg, struct sun8i_ss_alg_template, alg.rng); + ss = algt->ss; + + if (ctx->slen == 0) { + dev_err(ss->dev, "The PRNG is not seeded\n"); + return -EINVAL; + } + + /* The SS does not give an updated seed, so we need to get a new one. + * So we will ask for an extra PRNG_SEED_SIZE data. + * We want dlen + seedsize rounded up to a multiple of PRNG_DATA_SIZE + */ + todo = dlen + PRNG_SEED_SIZE + PRNG_DATA_SIZE; + todo -= todo % PRNG_DATA_SIZE; + + d = kzalloc(todo, GFP_KERNEL | GFP_DMA); + if (!d) + return -ENOMEM; + + flow = sun8i_ss_get_engine_number(ss); + +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + algt->stat_req++; + algt->stat_bytes += todo; +#endif + + v = SS_ALG_PRNG | SS_PRNG_CONTINUE | SS_START; + if (flow) + v |= SS_FLOW1; + else + v |= SS_FLOW0; + + dma_iv = dma_map_single(ss->dev, ctx->seed, ctx->slen, DMA_TO_DEVICE); + if (dma_mapping_error(ss->dev, dma_iv)) { + dev_err(ss->dev, "Cannot DMA MAP IV\n"); + return -EFAULT; + } + + dma_dst = dma_map_single(ss->dev, d, todo, DMA_FROM_DEVICE); + if (dma_mapping_error(ss->dev, dma_dst)) { + dev_err(ss->dev, "Cannot DMA MAP DST\n"); + err = -EFAULT; + goto err_iv; + } + + err = pm_runtime_get_sync(ss->dev); + if (err < 0) { + pm_runtime_put_noidle(ss->dev); + goto err_pm; + } + err = 0; + + mutex_lock(&ss->mlock); + writel(dma_iv, ss->base + SS_IV_ADR_REG); + /* the PRNG act badly (failing rngtest) without SS_KEY_ADR_REG set */ + writel(dma_iv, ss->base + SS_KEY_ADR_REG); + writel(dma_dst, ss->base + SS_DST_ADR_REG); + writel(todo / 4, ss->base + SS_LEN_ADR_REG); + + reinit_completion(&ss->flows[flow].complete); + ss->flows[flow].status = 0; + /* Be sure all data is written before enabling the task */ + wmb(); + + writel(v, ss->base + SS_CTL_REG); + + wait_for_completion_interruptible_timeout(&ss->flows[flow].complete, + msecs_to_jiffies(todo)); + if (ss->flows[flow].status == 0) { + dev_err(ss->dev, "DMA timeout for PRNG (size=%u)\n", todo); + err = -EFAULT; + } + /* Since cipher and hash use the linux/cryptoengine and that we have + * a cryptoengine per flow, we are sure that they will issue only one + * request per flow. + * Since the cryptoengine wait for completion before submitting a new + * one, the mlock could be left just after the final writel. + * But cryptoengine cannot handle crypto_rng, so we need to be sure + * nothing will use our flow. + * The easiest way is to grab mlock until the hardware end our requests. + * We could have used a per flow lock, but this would increase + * complexity. + * The drawback is that no request could be handled for the other flow. + */ + mutex_unlock(&ss->mlock); + + pm_runtime_put(ss->dev); + +err_pm: + dma_unmap_single(ss->dev, dma_dst, todo, DMA_FROM_DEVICE); +err_iv: + dma_unmap_single(ss->dev, dma_iv, ctx->slen, DMA_TO_DEVICE); + + if (!err) { + memcpy(dst, d, dlen); + /* Update seed */ + memcpy(ctx->seed, d + dlen, ctx->slen); + } + memzero_explicit(d, todo); + kfree(d); + + return err; +} diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h index 0405767f1f7e..1a66457f4a20 100644 --- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h @@ -8,10 +8,16 @@ #include <crypto/aes.h> #include <crypto/des.h> #include <crypto/engine.h> +#include <crypto/rng.h> #include <crypto/skcipher.h> #include <linux/atomic.h> #include <linux/debugfs.h> #include <linux/crypto.h> +#include <crypto/internal/hash.h> +#include <crypto/md5.h> +#include <crypto/sha.h> + +#define SS_START 1 #define SS_ENCRYPTION 0 #define SS_DECRYPTION BIT(6) @@ -19,6 +25,11 @@ #define SS_ALG_AES 0 #define SS_ALG_DES (1 << 2) #define SS_ALG_3DES (2 << 2) +#define SS_ALG_MD5 (3 << 2) +#define SS_ALG_PRNG (4 << 2) +#define SS_ALG_SHA1 (6 << 2) +#define SS_ALG_SHA224 (7 << 2) +#define SS_ALG_SHA256 (8 << 2) #define SS_CTL_REG 0x00 #define SS_INT_CTL_REG 0x04 @@ -47,9 +58,17 @@ #define SS_OP_ECB 0 #define SS_OP_CBC (1 << 13) +#define SS_ID_HASH_MD5 0 +#define SS_ID_HASH_SHA1 1 +#define SS_ID_HASH_SHA224 2 +#define SS_ID_HASH_SHA256 3 +#define SS_ID_HASH_MAX 4 + #define SS_FLOW0 BIT(30) #define SS_FLOW1 BIT(31) +#define SS_PRNG_CONTINUE BIT(18) + #define MAX_SG 8 #define MAXFLOW 2 @@ -59,6 +78,9 @@ #define SS_DIE_ID_SHIFT 20 #define SS_DIE_ID_MASK 0x07 +#define PRNG_DATA_SIZE (160 / 8) +#define PRNG_SEED_SIZE DIV_ROUND_UP(175, 8) + /* * struct ss_clock - Describe clocks used by sun8i-ss * @name: Name of clock needed by this variant @@ -75,11 +97,14 @@ struct ss_clock { * struct ss_variant - Describe SS capability for each variant hardware * @alg_cipher: list of supported ciphers. for each SS_ID_ this will give the * coresponding SS_ALG_XXX value + * @alg_hash: list of supported hashes. for each SS_ID_ this will give the + * corresponding SS_ALG_XXX value * @op_mode: list of supported block modes - * @ss_clks! list of clock needed by this variant + * @ss_clks: list of clock needed by this variant */ struct ss_variant { char alg_cipher[SS_ID_CIPHER_MAX]; + char alg_hash[SS_ID_HASH_MAX]; u32 op_mode[SS_ID_OP_MAX]; struct ss_clock ss_clks[SS_MAX_CLOCKS]; }; @@ -170,6 +195,8 @@ struct sun8i_cipher_req_ctx { * @keylen: len of the key * @ss: pointer to the private data of driver handling this TFM * @fallback_tfm: pointer to the fallback TFM + * + * enginectx must be the first element */ struct sun8i_cipher_tfm_ctx { struct crypto_engine_ctx enginectx; @@ -180,6 +207,46 @@ struct sun8i_cipher_tfm_ctx { }; /* + * struct sun8i_ss_prng_ctx - context for PRNG TFM + * @seed: The seed to use + * @slen: The size of the seed + */ +struct sun8i_ss_rng_tfm_ctx { + void *seed; + unsigned int slen; +}; + +/* + * struct sun8i_ss_hash_tfm_ctx - context for an ahash TFM + * @enginectx: crypto_engine used by this TFM + * @fallback_tfm: pointer to the fallback TFM + * @ss: pointer to the private data of driver handling this TFM + * + * enginectx must be the first element + */ +struct sun8i_ss_hash_tfm_ctx { + struct crypto_engine_ctx enginectx; + struct crypto_ahash *fallback_tfm; + struct sun8i_ss_dev *ss; +}; + +/* + * struct sun8i_ss_hash_reqctx - context for an ahash request + * @t_src: list of DMA address and size for source SGs + * @t_dst: list of DMA address and size for destination SGs + * @fallback_req: pre-allocated fallback request + * @method: the register value for the algorithm used by this request + * @flow: the flow to use for this request + */ +struct sun8i_ss_hash_reqctx { + struct sginfo t_src[MAX_SG]; + struct sginfo t_dst[MAX_SG]; + struct ahash_request fallback_req; + u32 method; + int flow; +}; + +/* * struct sun8i_ss_alg_template - crypto_alg template * @type: the CRYPTO_ALG_TYPE for this template * @ss_algo_id: the SS_ID for this template @@ -189,6 +256,7 @@ struct sun8i_cipher_tfm_ctx { * @alg: one of sub struct must be used * @stat_req: number of request done on this template * @stat_fb: number of request which has fallbacked + * @stat_bytes: total data size done by this template */ struct sun8i_ss_alg_template { u32 type; @@ -197,10 +265,13 @@ struct sun8i_ss_alg_template { struct sun8i_ss_dev *ss; union { struct skcipher_alg skcipher; + struct rng_alg rng; + struct ahash_alg hash; } alg; #ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG unsigned long stat_req; unsigned long stat_fb; + unsigned long stat_bytes; #endif }; @@ -218,3 +289,19 @@ int sun8i_ss_skencrypt(struct skcipher_request *areq); int sun8i_ss_get_engine_number(struct sun8i_ss_dev *ss); int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx, const char *name); +int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int dlen); +int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); +int sun8i_ss_prng_init(struct crypto_tfm *tfm); +void sun8i_ss_prng_exit(struct crypto_tfm *tfm); + +int sun8i_ss_hash_crainit(struct crypto_tfm *tfm); +void sun8i_ss_hash_craexit(struct crypto_tfm *tfm); +int sun8i_ss_hash_init(struct ahash_request *areq); +int sun8i_ss_hash_export(struct ahash_request *areq, void *out); +int sun8i_ss_hash_import(struct ahash_request *areq, const void *in); +int sun8i_ss_hash_final(struct ahash_request *areq); +int sun8i_ss_hash_update(struct ahash_request *areq); +int sun8i_ss_hash_finup(struct ahash_request *areq); +int sun8i_ss_hash_digest(struct ahash_request *areq); +int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq); |