diff options
| author | Shravani Dingari <shravanid@nvidia.com> | 2013-11-28 11:28:58 +0530 |
|---|---|---|
| committer | Shravani Dingari <shravanid@nvidia.com> | 2013-12-09 02:36:10 -0800 |
| commit | 2424b48879583dbb3f44376851387b120ea3350e (patch) | |
| tree | 0797cc10149ea93979ac330d9087d3cc6419fb80 /drivers/crypto | |
| parent | d677810e4927d7e8cfe7f9411356810f0a8bce01 (diff) | |
crypto: tegra-se: Support RSA Context Restore test
Support for RSA Context Restore test and also allocate
RSA key slot only if it is not done for current context
Change-Id: I50c9f3fca6c189a17d07ba3325118a0fa6e13906
Signed-off-by: Shravani Dingari <shravanid@nvidia.com>
Reviewed-on: http://git-master/r/299945
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/tegra-se.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/drivers/crypto/tegra-se.c b/drivers/crypto/tegra-se.c index 8d4166c25366..f13e40e8e8f5 100644 --- a/drivers/crypto/tegra-se.c +++ b/drivers/crypto/tegra-se.c @@ -1923,7 +1923,8 @@ struct tegra_se_rsa_slot { struct tegra_se_aes_rsa_context { struct tegra_se_dev *se_dev; /* Security Engine device */ struct tegra_se_rsa_slot *slot; /* Security Engine rsa key slot */ - u32 keylen; /* key length in bits */ + u32 mod_len; + u32 exp_len; }; static void tegra_se_rsa_free_key_slot(struct tegra_se_rsa_slot *slot) @@ -2010,13 +2011,14 @@ int tegra_se_rsa_setkey(struct crypto_ahash *tfm, const u8 *key, return -EINVAL; /* Allocate rsa key slot */ - pslot = tegra_se_alloc_rsa_key_slot(); - if (!pslot) { - dev_err(se_dev->dev, "no free key slot\n"); - return -ENOMEM; + if (!ctx->slot) { + pslot = tegra_se_alloc_rsa_key_slot(); + if (!pslot) { + dev_err(se_dev->dev, "no free key slot\n"); + return -ENOMEM; + } + ctx->slot = pslot; } - ctx->slot = pslot; - ctx->keylen = keylen; module_key_length = (keylen >> 16); exponent_key_length = (keylen & (0xFFFF)); @@ -2025,6 +2027,9 @@ int tegra_se_rsa_setkey(struct crypto_ahash *tfm, const u8 *key, ((module_key_length / 64) <= 4))) return -EINVAL; + ctx->mod_len = module_key_length; + ctx->exp_len = exponent_key_length; + freq = se_dev->chipdata->rsa_freq; if (se_dev->pclk) { @@ -2039,14 +2044,6 @@ int tegra_se_rsa_setkey(struct crypto_ahash *tfm, const u8 *key, mutex_lock(&se_hw_lock); pm_runtime_get_sync(se_dev->dev); - /* Write key length */ - se_writel(se_dev, ((module_key_length / 64) - 1), - SE_RSA_KEY_SIZE_REG_OFFSET); - - /* Write exponent size in 32 bytes */ - se_writel(se_dev, (exponent_key_length / 4), - SE_RSA_EXP_SIZE_REG_OFFSET); - if (exponent_key_length) { key_size_words = (exponent_key_length / key_word_size); /* Write exponent */ @@ -2078,6 +2075,7 @@ int tegra_se_rsa_setkey(struct crypto_ahash *tfm, const u8 *key, se_writel(se_dev, val, SE_RSA_KEYTABLE_ADDR); } } + pm_runtime_put(se_dev->dev); mutex_unlock(&se_hw_lock); return 0; @@ -2158,6 +2156,14 @@ int tegra_se_rsa_digest(struct ahash_request *req) mutex_lock(&se_hw_lock); pm_runtime_get_sync(se_dev->dev); + /* Write key length */ + se_writel(se_dev, ((rsa_ctx->mod_len / 64) - 1), + SE_RSA_KEY_SIZE_REG_OFFSET); + + /* Write exponent size in 32 bytes */ + se_writel(se_dev, (rsa_ctx->exp_len / 4), + SE_RSA_EXP_SIZE_REG_OFFSET); + val = SE_CONFIG_ENC_ALG(ALG_RSA) | SE_CONFIG_DEC_ALG(ALG_NOP) | SE_CONFIG_DST(DST_RSAREG); @@ -2195,7 +2201,6 @@ int tegra_se_rsa_cra_init(struct crypto_tfm *tfm) void tegra_se_rsa_cra_exit(struct crypto_tfm *tfm) { struct tegra_se_aes_rsa_context *ctx = crypto_tfm_ctx(tfm); - tegra_se_rsa_free_key_slot(ctx->slot); ctx->slot = NULL; } |