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Subject[PATCH v2 01/10] crypto: caam - refactor skcipher/aead/gcm/chachapoly {en,de}crypt functions
Date
Create a common crypt function for each skcipher/aead/gcm/chachapoly
algorithms and call it for encrypt/decrypt with the specific boolean -
true for encrypt and false for decrypt.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
---
drivers/crypto/caam/caamalg.c | 268 +++++++++---------------------------------
1 file changed, 53 insertions(+), 215 deletions(-)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 2912006..6e021692 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -960,8 +960,8 @@ static void skcipher_unmap(struct device *dev, struct skcipher_edesc *edesc,
edesc->sec4_sg_dma, edesc->sec4_sg_bytes);
}

-static void aead_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
- void *context)
+static void aead_crypt_done(struct device *jrdev, u32 *desc, u32 err,
+ void *context)
{
struct aead_request *req = context;
struct aead_edesc *edesc;
@@ -981,69 +981,8 @@ static void aead_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
aead_request_complete(req, ecode);
}

-static void aead_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
- void *context)
-{
- struct aead_request *req = context;
- struct aead_edesc *edesc;
- int ecode = 0;
-
- dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
-
- edesc = container_of(desc, struct aead_edesc, hw_desc[0]);
-
- if (err)
- ecode = caam_jr_strstatus(jrdev, err);
-
- aead_unmap(jrdev, edesc, req);
-
- kfree(edesc);
-
- aead_request_complete(req, ecode);
-}
-
-static void skcipher_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
- void *context)
-{
- struct skcipher_request *req = context;
- struct skcipher_edesc *edesc;
- struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
- int ivsize = crypto_skcipher_ivsize(skcipher);
- int ecode = 0;
-
- dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
-
- edesc = container_of(desc, struct skcipher_edesc, hw_desc[0]);
-
- if (err)
- ecode = caam_jr_strstatus(jrdev, err);
-
- skcipher_unmap(jrdev, edesc, req);
-
- /*
- * The crypto API expects us to set the IV (req->iv) to the last
- * ciphertext block (CBC mode) or last counter (CTR mode).
- * This is used e.g. by the CTS mode.
- */
- if (ivsize && !ecode) {
- memcpy(req->iv, (u8 *)edesc->sec4_sg + edesc->sec4_sg_bytes,
- ivsize);
- print_hex_dump_debug("dstiv @"__stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, req->iv,
- edesc->src_nents > 1 ? 100 : ivsize, 1);
- }
-
- caam_dump_sg("dst @" __stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, req->dst,
- edesc->dst_nents > 1 ? 100 : req->cryptlen, 1);
-
- kfree(edesc);
-
- skcipher_request_complete(req, ecode);
-}
-
-static void skcipher_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
- void *context)
+static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
+ void *context)
{
struct skcipher_request *req = context;
struct skcipher_edesc *edesc;
@@ -1455,41 +1394,7 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
return edesc;
}

-static int gcm_encrypt(struct aead_request *req)
-{
- struct aead_edesc *edesc;
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct caam_ctx *ctx = crypto_aead_ctx(aead);
- struct device *jrdev = ctx->jrdev;
- bool all_contig;
- u32 *desc;
- int ret = 0;
-
- /* allocate extended descriptor */
- edesc = aead_edesc_alloc(req, GCM_DESC_JOB_IO_LEN, &all_contig, true);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- /* Create and submit job descriptor */
- init_gcm_job(req, edesc, all_contig, true);
-
- print_hex_dump_debug("aead jobdesc@"__stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
- desc_bytes(edesc->hw_desc), 1);
-
- desc = edesc->hw_desc;
- ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
-
- return ret;
-}
-
-static int chachapoly_encrypt(struct aead_request *req)
+static inline int chachapoly_crypt(struct aead_request *req, bool encrypt)
{
struct aead_edesc *edesc;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
@@ -1500,18 +1405,18 @@ static int chachapoly_encrypt(struct aead_request *req)
int ret;

edesc = aead_edesc_alloc(req, CHACHAPOLY_DESC_JOB_IO_LEN, &all_contig,
- true);
+ encrypt);
if (IS_ERR(edesc))
return PTR_ERR(edesc);

desc = edesc->hw_desc;

- init_chachapoly_job(req, edesc, all_contig, true);
+ init_chachapoly_job(req, edesc, all_contig, encrypt);
print_hex_dump_debug("chachapoly jobdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
+ ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
@@ -1522,45 +1427,17 @@ static int chachapoly_encrypt(struct aead_request *req)
return ret;
}

-static int chachapoly_decrypt(struct aead_request *req)
+static int chachapoly_encrypt(struct aead_request *req)
{
- struct aead_edesc *edesc;
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct caam_ctx *ctx = crypto_aead_ctx(aead);
- struct device *jrdev = ctx->jrdev;
- bool all_contig;
- u32 *desc;
- int ret;
-
- edesc = aead_edesc_alloc(req, CHACHAPOLY_DESC_JOB_IO_LEN, &all_contig,
- false);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- desc = edesc->hw_desc;
-
- init_chachapoly_job(req, edesc, all_contig, false);
- print_hex_dump_debug("chachapoly jobdesc@" __stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
- 1);
-
- ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
-
- return ret;
+ return chachapoly_crypt(req, true);
}

-static int ipsec_gcm_encrypt(struct aead_request *req)
+static int chachapoly_decrypt(struct aead_request *req)
{
- return crypto_ipsec_check_assoclen(req->assoclen) ? : gcm_encrypt(req);
+ return chachapoly_crypt(req, false);
}

-static int aead_encrypt(struct aead_request *req)
+static inline int aead_crypt(struct aead_request *req, bool encrypt)
{
struct aead_edesc *edesc;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
@@ -1572,19 +1449,19 @@ static int aead_encrypt(struct aead_request *req)

/* allocate extended descriptor */
edesc = aead_edesc_alloc(req, AUTHENC_DESC_JOB_IO_LEN,
- &all_contig, true);
+ &all_contig, encrypt);
if (IS_ERR(edesc))
return PTR_ERR(edesc);

/* Create and submit job descriptor */
- init_authenc_job(req, edesc, all_contig, true);
+ init_authenc_job(req, edesc, all_contig, encrypt);

print_hex_dump_debug("aead jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);

desc = edesc->hw_desc;
- ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
+ ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
@@ -1595,7 +1472,17 @@ static int aead_encrypt(struct aead_request *req)
return ret;
}

-static int gcm_decrypt(struct aead_request *req)
+static int aead_encrypt(struct aead_request *req)
+{
+ return aead_crypt(req, true);
+}
+
+static int aead_decrypt(struct aead_request *req)
+{
+ return aead_crypt(req, false);
+}
+
+static inline int gcm_crypt(struct aead_request *req, bool encrypt)
{
struct aead_edesc *edesc;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
@@ -1606,19 +1493,20 @@ static int gcm_decrypt(struct aead_request *req)
int ret = 0;

/* allocate extended descriptor */
- edesc = aead_edesc_alloc(req, GCM_DESC_JOB_IO_LEN, &all_contig, false);
+ edesc = aead_edesc_alloc(req, GCM_DESC_JOB_IO_LEN, &all_contig,
+ encrypt);
if (IS_ERR(edesc))
return PTR_ERR(edesc);

- /* Create and submit job descriptor*/
- init_gcm_job(req, edesc, all_contig, false);
+ /* Create and submit job descriptor */
+ init_gcm_job(req, edesc, all_contig, encrypt);

print_hex_dump_debug("aead jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);

desc = edesc->hw_desc;
- ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
+ ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
@@ -1629,48 +1517,24 @@ static int gcm_decrypt(struct aead_request *req)
return ret;
}

-static int ipsec_gcm_decrypt(struct aead_request *req)
+static int gcm_encrypt(struct aead_request *req)
{
- return crypto_ipsec_check_assoclen(req->assoclen) ? : gcm_decrypt(req);
+ return gcm_crypt(req, true);
}

-static int aead_decrypt(struct aead_request *req)
+static int gcm_decrypt(struct aead_request *req)
{
- struct aead_edesc *edesc;
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct caam_ctx *ctx = crypto_aead_ctx(aead);
- struct device *jrdev = ctx->jrdev;
- bool all_contig;
- u32 *desc;
- int ret = 0;
-
- caam_dump_sg("dec src@" __stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, req->src,
- req->assoclen + req->cryptlen, 1);
-
- /* allocate extended descriptor */
- edesc = aead_edesc_alloc(req, AUTHENC_DESC_JOB_IO_LEN,
- &all_contig, false);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- /* Create and submit job descriptor*/
- init_authenc_job(req, edesc, all_contig, false);
-
- print_hex_dump_debug("aead jobdesc@"__stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
- desc_bytes(edesc->hw_desc), 1);
+ return gcm_crypt(req, false);
+}

- desc = edesc->hw_desc;
- ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
+static int ipsec_gcm_encrypt(struct aead_request *req)
+{
+ return crypto_ipsec_check_assoclen(req->assoclen) ? : gcm_encrypt(req);
+}

- return ret;
+static int ipsec_gcm_decrypt(struct aead_request *req)
+{
+ return crypto_ipsec_check_assoclen(req->assoclen) ? : gcm_decrypt(req);
}

/*
@@ -1834,7 +1698,7 @@ static struct skcipher_edesc *skcipher_edesc_alloc(struct skcipher_request *req,
return edesc;
}

-static int skcipher_encrypt(struct skcipher_request *req)
+static inline int skcipher_crypt(struct skcipher_request *req, bool encrypt)
{
struct skcipher_edesc *edesc;
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
@@ -1852,14 +1716,14 @@ static int skcipher_encrypt(struct skcipher_request *req)
return PTR_ERR(edesc);

/* Create and submit job descriptor*/
- init_skcipher_job(req, edesc, true);
+ init_skcipher_job(req, edesc, encrypt);

print_hex_dump_debug("skcipher jobdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);

desc = edesc->hw_desc;
- ret = caam_jr_enqueue(jrdev, desc, skcipher_encrypt_done, req);
+ ret = caam_jr_enqueue(jrdev, desc, skcipher_crypt_done, req);

if (!ret) {
ret = -EINPROGRESS;
@@ -1871,40 +1735,14 @@ static int skcipher_encrypt(struct skcipher_request *req)
return ret;
}

-static int skcipher_decrypt(struct skcipher_request *req)
+static int skcipher_encrypt(struct skcipher_request *req)
{
- struct skcipher_edesc *edesc;
- struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
- struct caam_ctx *ctx = crypto_skcipher_ctx(skcipher);
- struct device *jrdev = ctx->jrdev;
- u32 *desc;
- int ret = 0;
-
- if (!req->cryptlen)
- return 0;
-
- /* allocate extended descriptor */
- edesc = skcipher_edesc_alloc(req, DESC_JOB_IO_LEN * CAAM_CMD_SZ);
- if (IS_ERR(edesc))
- return PTR_ERR(edesc);
-
- /* Create and submit job descriptor*/
- init_skcipher_job(req, edesc, false);
- desc = edesc->hw_desc;
-
- print_hex_dump_debug("skcipher jobdesc@" __stringify(__LINE__)": ",
- DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
- desc_bytes(edesc->hw_desc), 1);
-
- ret = caam_jr_enqueue(jrdev, desc, skcipher_decrypt_done, req);
- if (!ret) {
- ret = -EINPROGRESS;
- } else {
- skcipher_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
+ return skcipher_crypt(req, true);
+}

- return ret;
+static int skcipher_decrypt(struct skcipher_request *req)
+{
+ return skcipher_crypt(req, false);
}

static struct caam_skcipher_alg driver_algs[] = {
--
2.1.0
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