diff options
Diffstat (limited to 'drivers/crypto/s5p-sss.c')
| -rw-r--r-- | drivers/crypto/s5p-sss.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index 188f44b7eb27..bf7163042569 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -404,29 +404,31 @@ static const struct of_device_id s5p_sss_dt_match[] = { }; MODULE_DEVICE_TABLE(of, s5p_sss_dt_match); -static inline struct samsung_aes_variant *find_s5p_sss_version - (struct platform_device *pdev) +static inline const struct samsung_aes_variant *find_s5p_sss_version + (const struct platform_device *pdev) { if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node)) { const struct of_device_id *match; match = of_match_node(s5p_sss_dt_match, pdev->dev.of_node); - return (struct samsung_aes_variant *)match->data; + return (const struct samsung_aes_variant *)match->data; } - return (struct samsung_aes_variant *) + return (const struct samsung_aes_variant *) platform_get_device_id(pdev)->driver_data; } static struct s5p_aes_dev *s5p_dev; -static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) +static void s5p_set_dma_indata(struct s5p_aes_dev *dev, + const struct scatterlist *sg) { SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg)); SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg)); } -static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) +static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, + const struct scatterlist *sg) { SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg)); SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg)); @@ -619,7 +621,7 @@ static inline void s5p_hash_write(struct s5p_aes_dev *dd, * @sg: scatterlist ready to DMA transmit */ static void s5p_set_dma_hashdata(struct s5p_aes_dev *dev, - struct scatterlist *sg) + const struct scatterlist *sg) { dev->hash_sg_cnt--; SSS_WRITE(dev, FCHRDMAS, sg_dma_address(sg)); @@ -792,9 +794,9 @@ static void s5p_hash_read_msg(struct ahash_request *req) * @ctx: request context */ static void s5p_hash_write_ctx_iv(struct s5p_aes_dev *dd, - struct s5p_hash_reqctx *ctx) + const struct s5p_hash_reqctx *ctx) { - u32 *hash = (u32 *)ctx->digest; + const u32 *hash = (const u32 *)ctx->digest; unsigned int i; for (i = 0; i < ctx->nregs; i++) @@ -818,7 +820,7 @@ static void s5p_hash_write_iv(struct ahash_request *req) */ static void s5p_hash_copy_result(struct ahash_request *req) { - struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); + const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); if (!req->result) return; @@ -1210,9 +1212,6 @@ static int s5p_hash_prepare_request(struct ahash_request *req, bool update) int xmit_len, hash_later, nbytes; int ret; - if (!req) - return 0; - if (update) nbytes = req->nbytes; else @@ -1293,7 +1292,7 @@ static int s5p_hash_prepare_request(struct ahash_request *req, bool update) */ static void s5p_hash_update_dma_stop(struct s5p_aes_dev *dd) { - struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req); + const struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req); dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE); clear_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags); @@ -1720,7 +1719,7 @@ static void s5p_hash_cra_exit(struct crypto_tfm *tfm) */ static int s5p_hash_export(struct ahash_request *req, void *out) { - struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); + const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req); memcpy(out, ctx, sizeof(*ctx) + ctx->bufcnt); @@ -1834,7 +1833,8 @@ static struct ahash_alg algs_sha1_md5_sha256[] = { }; static void s5p_set_aes(struct s5p_aes_dev *dev, - uint8_t *key, uint8_t *iv, unsigned int keylen) + const uint8_t *key, const uint8_t *iv, + unsigned int keylen) { void __iomem *keystart; @@ -1922,15 +1922,21 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) uint32_t aes_control; unsigned long flags; int err; + u8 *iv; aes_control = SSS_AES_KEY_CHANGE_MODE; if (mode & FLAGS_AES_DECRYPT) aes_control |= SSS_AES_MODE_DECRYPT; - if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) + if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) { aes_control |= SSS_AES_CHAIN_MODE_CBC; - else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) + iv = req->info; + } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) { aes_control |= SSS_AES_CHAIN_MODE_CTR; + iv = req->info; + } else { + iv = NULL; /* AES_ECB */ + } if (dev->ctx->keylen == AES_KEYSIZE_192) aes_control |= SSS_AES_KEY_SIZE_192; @@ -1961,7 +1967,7 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) goto outdata_error; SSS_AES_WRITE(dev, AES_CONTROL, aes_control); - s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen); + s5p_set_aes(dev, dev->ctx->aes_key, iv, dev->ctx->keylen); s5p_set_dma_indata(dev, dev->sg_src); s5p_set_dma_outdata(dev, dev->sg_dst); @@ -2147,7 +2153,7 @@ static int s5p_aes_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; int i, j, err = -ENODEV; - struct samsung_aes_variant *variant; + const struct samsung_aes_variant *variant; struct s5p_aes_dev *pdata; struct resource *res; unsigned int hash_i; |