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path: root/drivers/crypto/mediatek/mtk-aes.c
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Diffstat (limited to 'drivers/crypto/mediatek/mtk-aes.c')
-rw-r--r--drivers/crypto/mediatek/mtk-aes.c143
1 files changed, 102 insertions, 41 deletions
diff --git a/drivers/crypto/mediatek/mtk-aes.c b/drivers/crypto/mediatek/mtk-aes.c
index b7477ee32ca0..90c9644fb8a8 100644
--- a/drivers/crypto/mediatek/mtk-aes.c
+++ b/drivers/crypto/mediatek/mtk-aes.c
@@ -23,7 +23,7 @@
#define AES_CT_CTRL_HDR cpu_to_le32(0x00220000)
-/* AES-CBC/ECB/CTR command token */
+/* AES-CBC/ECB/CTR/OFB/CFB command token */
#define AES_CMD0 cpu_to_le32(0x05000000)
#define AES_CMD1 cpu_to_le32(0x2d060000)
#define AES_CMD2 cpu_to_le32(0xe4a63806)
@@ -50,6 +50,8 @@
/* AES transform information word 1 fields */
#define AES_TFM_ECB cpu_to_le32(0x0 << 0)
#define AES_TFM_CBC cpu_to_le32(0x1 << 0)
+#define AES_TFM_OFB cpu_to_le32(0x4 << 0)
+#define AES_TFM_CFB128 cpu_to_le32(0x5 << 0)
#define AES_TFM_CTR_INIT cpu_to_le32(0x2 << 0) /* init counter to 1 */
#define AES_TFM_CTR_LOAD cpu_to_le32(0x6 << 0) /* load/reuse counter */
#define AES_TFM_3IV cpu_to_le32(0x7 << 5) /* using IV 0-2 */
@@ -58,13 +60,15 @@
#define AES_TFM_ENC_HASH cpu_to_le32(0x1 << 17)
/* AES flags */
-#define AES_FLAGS_CIPHER_MSK GENMASK(2, 0)
+#define AES_FLAGS_CIPHER_MSK GENMASK(4, 0)
#define AES_FLAGS_ECB BIT(0)
#define AES_FLAGS_CBC BIT(1)
#define AES_FLAGS_CTR BIT(2)
-#define AES_FLAGS_GCM BIT(3)
-#define AES_FLAGS_ENCRYPT BIT(4)
-#define AES_FLAGS_BUSY BIT(5)
+#define AES_FLAGS_OFB BIT(3)
+#define AES_FLAGS_CFB128 BIT(4)
+#define AES_FLAGS_GCM BIT(5)
+#define AES_FLAGS_ENCRYPT BIT(6)
+#define AES_FLAGS_BUSY BIT(7)
#define AES_AUTH_TAG_ERR cpu_to_le32(BIT(26))
@@ -101,6 +105,7 @@ struct mtk_aes_reqctx {
struct mtk_aes_base_ctx {
struct mtk_cryp *cryp;
u32 keylen;
+ __le32 key[12];
__le32 keymode;
mtk_aes_fn start;
@@ -405,7 +410,7 @@ exit:
return mtk_aes_complete(cryp, aes, -EINVAL);
}
-/* Initialize transform information of CBC/ECB/CTR mode */
+/* Initialize transform information of CBC/ECB/CTR/OFB/CFB mode */
static void mtk_aes_info_init(struct mtk_cryp *cryp, struct mtk_aes_rec *aes,
size_t len)
{
@@ -434,7 +439,12 @@ static void mtk_aes_info_init(struct mtk_cryp *cryp, struct mtk_aes_rec *aes,
case AES_FLAGS_CTR:
info->tfm[1] = AES_TFM_CTR_LOAD;
goto ctr;
-
+ case AES_FLAGS_OFB:
+ info->tfm[1] = AES_TFM_OFB;
+ break;
+ case AES_FLAGS_CFB128:
+ info->tfm[1] = AES_TFM_CFB128;
+ break;
default:
/* Should not happen... */
return;
@@ -525,6 +535,8 @@ static int mtk_aes_handle_queue(struct mtk_cryp *cryp, u8 id,
backlog->complete(backlog, -EINPROGRESS);
ctx = crypto_tfm_ctx(areq->tfm);
+ /* Write key into state buffer */
+ memcpy(ctx->info.state, ctx->key, sizeof(ctx->key));
aes->areq = areq;
aes->ctx = ctx;
@@ -644,21 +656,26 @@ static int mtk_aes_setkey(struct crypto_ablkcipher *tfm,
}
ctx->keylen = SIZE_IN_WORDS(keylen);
- mtk_aes_write_state_le(ctx->info.state, (const u32 *)key, keylen);
+ mtk_aes_write_state_le(ctx->key, (const u32 *)key, keylen);
return 0;
}
static int mtk_aes_crypt(struct ablkcipher_request *req, u64 mode)
{
- struct mtk_aes_base_ctx *ctx;
+ struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
+ struct mtk_aes_base_ctx *ctx = crypto_ablkcipher_ctx(ablkcipher);
struct mtk_aes_reqctx *rctx;
+ struct mtk_cryp *cryp;
+
+ cryp = mtk_aes_find_dev(ctx);
+ if (!cryp)
+ return -ENODEV;
- ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
rctx = ablkcipher_request_ctx(req);
rctx->mode = mode;
- return mtk_aes_handle_queue(ctx->cryp, !(mode & AES_FLAGS_ENCRYPT),
+ return mtk_aes_handle_queue(cryp, !(mode & AES_FLAGS_ENCRYPT),
&req->base);
}
@@ -692,16 +709,29 @@ static int mtk_aes_ctr_decrypt(struct ablkcipher_request *req)
return mtk_aes_crypt(req, AES_FLAGS_CTR);
}
+static int mtk_aes_ofb_encrypt(struct ablkcipher_request *req)
+{
+ return mtk_aes_crypt(req, AES_FLAGS_ENCRYPT | AES_FLAGS_OFB);
+}
+
+static int mtk_aes_ofb_decrypt(struct ablkcipher_request *req)
+{
+ return mtk_aes_crypt(req, AES_FLAGS_OFB);
+}
+
+static int mtk_aes_cfb_encrypt(struct ablkcipher_request *req)
+{
+ return mtk_aes_crypt(req, AES_FLAGS_ENCRYPT | AES_FLAGS_CFB128);
+}
+
+static int mtk_aes_cfb_decrypt(struct ablkcipher_request *req)
+{
+ return mtk_aes_crypt(req, AES_FLAGS_CFB128);
+}
+
static int mtk_aes_cra_init(struct crypto_tfm *tfm)
{
struct mtk_aes_ctx *ctx = crypto_tfm_ctx(tfm);
- struct mtk_cryp *cryp = NULL;
-
- cryp = mtk_aes_find_dev(&ctx->base);
- if (!cryp) {
- pr_err("can't find crypto device\n");
- return -ENODEV;
- }
tfm->crt_ablkcipher.reqsize = sizeof(struct mtk_aes_reqctx);
ctx->base.start = mtk_aes_start;
@@ -711,13 +741,6 @@ static int mtk_aes_cra_init(struct crypto_tfm *tfm)
static int mtk_aes_ctr_cra_init(struct crypto_tfm *tfm)
{
struct mtk_aes_ctx *ctx = crypto_tfm_ctx(tfm);
- struct mtk_cryp *cryp = NULL;
-
- cryp = mtk_aes_find_dev(&ctx->base);
- if (!cryp) {
- pr_err("can't find crypto device\n");
- return -ENODEV;
- }
tfm->crt_ablkcipher.reqsize = sizeof(struct mtk_aes_reqctx);
ctx->base.start = mtk_aes_ctr_start;
@@ -787,6 +810,48 @@ static struct crypto_alg aes_algs[] = {
.decrypt = mtk_aes_ctr_decrypt,
}
},
+{
+ .cra_name = "ofb(aes)",
+ .cra_driver_name = "ofb-aes-mtk",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_init = mtk_aes_cra_init,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct mtk_aes_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = mtk_aes_setkey,
+ .encrypt = mtk_aes_ofb_encrypt,
+ .decrypt = mtk_aes_ofb_decrypt,
+ }
+},
+{
+ .cra_name = "cfb(aes)",
+ .cra_driver_name = "cfb-aes-mtk",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_init = mtk_aes_cra_init,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct mtk_aes_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = mtk_aes_setkey,
+ .encrypt = mtk_aes_cfb_encrypt,
+ .decrypt = mtk_aes_cfb_decrypt,
+ }
+},
};
static inline struct mtk_aes_gcm_ctx *
@@ -905,14 +970,11 @@ static int mtk_aes_gcm_start(struct mtk_cryp *cryp, struct mtk_aes_rec *aes)
aes->resume = mtk_aes_transfer_complete;
/* Compute total process length. */
aes->total = len + gctx->authsize;
- /* Compute text length. */
- gctx->textlen = req->cryptlen;
/* Hardware will append authenticated tag to output buffer */
scatterwalk_map_and_copy(tag, req->dst, len, gctx->authsize, 1);
} else {
aes->resume = mtk_aes_gcm_tag_verify;
aes->total = len;
- gctx->textlen = req->cryptlen - gctx->authsize;
}
return mtk_aes_gcm_dma(cryp, aes, req->src, req->dst, len);
@@ -923,6 +985,15 @@ static int mtk_aes_gcm_crypt(struct aead_request *req, u64 mode)
struct mtk_aes_base_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
struct mtk_aes_gcm_ctx *gctx = mtk_aes_gcm_ctx_cast(ctx);
struct mtk_aes_reqctx *rctx = aead_request_ctx(req);
+ struct mtk_cryp *cryp;
+ bool enc = !!(mode & AES_FLAGS_ENCRYPT);
+
+ cryp = mtk_aes_find_dev(ctx);
+ if (!cryp)
+ return -ENODEV;
+
+ /* Compute text length. */
+ gctx->textlen = req->cryptlen - (enc ? 0 : gctx->authsize);
/* Empty messages are not supported yet */
if (!gctx->textlen && !req->assoclen)
@@ -930,8 +1001,7 @@ static int mtk_aes_gcm_crypt(struct aead_request *req, u64 mode)
rctx->mode = AES_FLAGS_GCM | mode;
- return mtk_aes_handle_queue(ctx->cryp, !!(mode & AES_FLAGS_ENCRYPT),
- &req->base);
+ return mtk_aes_handle_queue(cryp, enc, &req->base);
}
/*
@@ -1003,10 +1073,8 @@ static int mtk_aes_gcm_setkey(struct crypto_aead *aead, const u8 *key,
if (err)
goto out;
- /* Write key into state buffer */
- mtk_aes_write_state_le(ctx->info.state, (const u32 *)key, keylen);
- /* Write key(H) into state buffer */
- mtk_aes_write_state_be(ctx->info.state + ctx->keylen, data->hash,
+ mtk_aes_write_state_le(ctx->key, (const u32 *)key, keylen);
+ mtk_aes_write_state_be(ctx->key + ctx->keylen, data->hash,
AES_BLOCK_SIZE);
out:
kzfree(data);
@@ -1046,13 +1114,6 @@ static int mtk_aes_gcm_decrypt(struct aead_request *req)
static int mtk_aes_gcm_init(struct crypto_aead *aead)
{
struct mtk_aes_gcm_ctx *ctx = crypto_aead_ctx(aead);
- struct mtk_cryp *cryp = NULL;
-
- cryp = mtk_aes_find_dev(&ctx->base);
- if (!cryp) {
- pr_err("can't find crypto device\n");
- return -ENODEV;
- }
ctx->ctr = crypto_alloc_skcipher("ctr(aes)", 0,
CRYPTO_ALG_ASYNC);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-05 11:01:58 +0300