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authorTero Kristo <t-kristo@ti.com>2017-05-24 09:35:31 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2017-06-10 06:04:19 +0200
commitad18cc9d0f911928704cdc37f4d126853daa9e4e (patch)
tree1a16791b6ee2b5fdbe468743c529869c81bb15bc /drivers/crypto/omap-aes.h
parentcrypto: omap-aes - export some AES driver functionality locally (diff)
downloadlinux-ad18cc9d0f911928704cdc37f4d126853daa9e4e.tar.xz
linux-ad18cc9d0f911928704cdc37f4d126853daa9e4e.zip
crypto: omap-aes - Add support for GCM mode
OMAP AES hw supports AES-GCM mode. This patch adds support for GCM and RFC4106 GCM mode in omap-aes driver. The GCM implementation is mostly written into its own source file, which gets built into the same driver binary as the existing AES support. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [t-kristo@ti.com: forward port to latest upstream kernel, conversion to use omap-crypto lib and some additional fixes] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-aes.h')
-rw-r--r--drivers/crypto/omap-aes.h54
1 files changed, 47 insertions, 7 deletions
diff --git a/drivers/crypto/omap-aes.h b/drivers/crypto/omap-aes.h
index 11e1784cc4a5..8906342e2b9a 100644
--- a/drivers/crypto/omap-aes.h
+++ b/drivers/crypto/omap-aes.h
@@ -30,11 +30,13 @@
#define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
#define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
+#define AES_REG_CTRL_CONTEXT_READY BIT(31)
#define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)
#define AES_REG_CTRL_CTR_WIDTH_32 0
#define AES_REG_CTRL_CTR_WIDTH_64 BIT(7)
#define AES_REG_CTRL_CTR_WIDTH_96 BIT(8)
#define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7)
+#define AES_REG_CTRL_GCM GENMASK(17, 16)
#define AES_REG_CTRL_CTR BIT(6)
#define AES_REG_CTRL_CBC BIT(5)
#define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3)
@@ -43,7 +45,12 @@
#define AES_REG_CTRL_OUTPUT_READY BIT(0)
#define AES_REG_CTRL_MASK GENMASK(24, 2)
+#define AES_REG_C_LEN_0 0x54
+#define AES_REG_C_LEN_1 0x58
+#define AES_REG_A_LEN 0x5C
+
#define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
+#define AES_REG_TAG_N(dd, x) (0x70 + ((x) * 0x04))
#define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
@@ -65,30 +72,41 @@
#define DEFAULT_AUTOSUSPEND_DELAY 1000
-#define FLAGS_MODE_MASK 0x000f
+#define FLAGS_MODE_MASK 0x001f
#define FLAGS_ENCRYPT BIT(0)
#define FLAGS_CBC BIT(1)
-#define FLAGS_GIV BIT(2)
-#define FLAGS_CTR BIT(3)
+#define FLAGS_CTR BIT(2)
+#define FLAGS_GCM BIT(3)
+#define FLAGS_RFC4106_GCM BIT(4)
-#define FLAGS_INIT BIT(4)
-#define FLAGS_FAST BIT(5)
-#define FLAGS_BUSY BIT(6)
+#define FLAGS_INIT BIT(5)
+#define FLAGS_FAST BIT(6)
+#define FLAGS_BUSY BIT(7)
#define FLAGS_IN_DATA_ST_SHIFT 8
#define FLAGS_OUT_DATA_ST_SHIFT 10
+#define FLAGS_ASSOC_DATA_ST_SHIFT 12
#define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2)
+struct omap_aes_gcm_result {
+ struct completion completion;
+ int err;
+};
+
struct omap_aes_ctx {
int keylen;
u32 key[AES_KEYSIZE_256 / sizeof(u32)];
+ u8 nonce[4];
struct crypto_skcipher *fallback;
+ struct crypto_skcipher *ctr;
};
struct omap_aes_reqctx {
struct omap_aes_dev *dd;
unsigned long mode;
+ u8 iv[AES_BLOCK_SIZE];
+ u32 auth_tag[AES_BLOCK_SIZE / sizeof(u32)];
};
#define OMAP_AES_QUEUE_LENGTH 1
@@ -100,9 +118,16 @@ struct omap_aes_algs_info {
unsigned int registered;
};
+struct omap_aes_aead_algs {
+ struct aead_alg *algs_list;
+ unsigned int size;
+ unsigned int registered;
+};
+
struct omap_aes_pdata {
struct omap_aes_algs_info *algs_info;
unsigned int algs_info_size;
+ struct omap_aes_aead_algs *aead_algs_info;
void (*trigger)(struct omap_aes_dev *dd, int length);
@@ -135,8 +160,11 @@ struct omap_aes_dev {
int err;
struct tasklet_struct done_task;
+ struct aead_queue aead_queue;
+ spinlock_t lock;
struct ablkcipher_request *req;
+ struct aead_request *aead_req;
struct crypto_engine *engine;
/*
@@ -145,12 +173,14 @@ struct omap_aes_dev {
*/
size_t total;
size_t total_save;
+ size_t assoc_len;
+ size_t authsize;
struct scatterlist *in_sg;
struct scatterlist *out_sg;
/* Buffers for copying for unaligned cases */
- struct scatterlist in_sgl;
+ struct scatterlist in_sgl[2];
struct scatterlist out_sgl;
struct scatterlist *orig_out;
@@ -167,8 +197,18 @@ struct omap_aes_dev {
u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset);
void omap_aes_write(struct omap_aes_dev *dd, u32 offset, u32 value);
struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_reqctx *rctx);
+int omap_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
+ unsigned int keylen);
+int omap_aes_4106gcm_setkey(struct crypto_aead *tfm, const u8 *key,
+ unsigned int keylen);
+int omap_aes_gcm_encrypt(struct aead_request *req);
+int omap_aes_gcm_decrypt(struct aead_request *req);
+int omap_aes_4106gcm_encrypt(struct aead_request *req);
+int omap_aes_4106gcm_decrypt(struct aead_request *req);
int omap_aes_write_ctrl(struct omap_aes_dev *dd);
int omap_aes_crypt_dma_start(struct omap_aes_dev *dd);
int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd);
+void omap_aes_gcm_dma_out_callback(void *data);
+void omap_aes_clear_copy_flags(struct omap_aes_dev *dd);
#endif