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Subject[PATCH v2 08/10] crypto: caam - add crypto_engine support for AEAD algorithms
Date
Add crypto_engine support for AEAD algorithms, to make use of
the engine queue.
The requests, with backlog flag, will be listed into crypto-engine
queue and processed by CAAM when free.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
---
drivers/crypto/caam/caamalg.c | 106 ++++++++++++++++++++++++++++++------------
1 file changed, 76 insertions(+), 30 deletions(-)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 8911c04..7cefd0a 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -122,6 +122,12 @@ struct caam_skcipher_req_ctx {
void *context);
};

+struct caam_aead_req_ctx {
+ struct aead_edesc *edesc;
+ void (*aead_op_done)(struct device *jrdev, u32 *desc, u32 err,
+ void *context);
+};
+
static int aead_null_set_sh_desc(struct crypto_aead *aead)
{
struct caam_ctx *ctx = crypto_aead_ctx(aead);
@@ -999,12 +1005,14 @@ static void aead_crypt_done(struct device *jrdev, u32 *desc, u32 err,
{
struct caam_aead_request_entry *jrentry = context;
struct aead_request *req = jrentry->base;
+ struct caam_aead_req_ctx *rctx = aead_request_ctx(req);
+ struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
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]);
+ edesc = rctx->edesc;

if (err)
ecode = caam_jr_strstatus(jrdev, err);
@@ -1013,7 +1021,14 @@ static void aead_crypt_done(struct device *jrdev, u32 *desc, u32 err,

kfree(edesc);

- aead_request_complete(req, ecode);
+ /*
+ * If no backlog flag, the completion of the request is done
+ * by CAAM, not crypto engine.
+ */
+ if (!jrentry->bklog)
+ aead_request_complete(req, ecode);
+ else
+ crypto_finalize_aead_request(jrp->engine, req, ecode);
}

static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
@@ -1309,6 +1324,7 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
+ struct caam_aead_req_ctx *rctx = aead_request_ctx(req);
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
@@ -1411,6 +1427,9 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
desc_bytes;
edesc->jrentry.base = req;

+ rctx->edesc = edesc;
+ rctx->aead_op_done = aead_crypt_done;
+
*all_contig_ptr = !(mapped_src_nents > 1);

sec4_sg_index = 0;
@@ -1441,6 +1460,28 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
return edesc;
}

+static int aead_enqueue_req(struct device *jrdev, u32 *desc,
+ void (*cbk)(struct device *jrdev, u32 *desc,
+ u32 err, void *context),
+ struct aead_request *req, struct aead_edesc *edesc)
+{
+ struct caam_drv_private_jr *jrpriv = dev_get_drvdata(jrdev);
+ int ret;
+
+ if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
+ return crypto_transfer_aead_request_to_engine(jrpriv->engine,
+ req);
+ else
+ ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done,
+ &edesc->jrentry);
+ if (ret != -EINPROGRESS) {
+ aead_unmap(jrdev, edesc, req);
+ kfree(edesc);
+ }
+
+ return ret;
+}
+
static inline int chachapoly_crypt(struct aead_request *req, bool encrypt)
{
struct aead_edesc *edesc;
@@ -1449,7 +1490,6 @@ static inline int chachapoly_crypt(struct aead_request *req, bool encrypt)
struct device *jrdev = ctx->jrdev;
bool all_contig;
u32 *desc;
- int ret;

edesc = aead_edesc_alloc(req, CHACHAPOLY_DESC_JOB_IO_LEN, &all_contig,
encrypt);
@@ -1463,13 +1503,7 @@ static inline int chachapoly_crypt(struct aead_request *req, bool encrypt)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- ret = caam_jr_enqueue(jrdev, desc, aead_crypt_done, &edesc->jrentry);
- if (ret != -EINPROGRESS) {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
-
- return ret;
+ return aead_enqueue_req(jrdev, desc, aead_crypt_done, req, edesc);
}

static int chachapoly_encrypt(struct aead_request *req)
@@ -1489,8 +1523,6 @@ static inline int aead_crypt(struct aead_request *req, bool encrypt)
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, AUTHENC_DESC_JOB_IO_LEN,
@@ -1505,14 +1537,8 @@ static inline int aead_crypt(struct aead_request *req, bool encrypt)
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_crypt_done, &edesc->jrentry);
- if (ret != -EINPROGRESS) {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
-
- return ret;
+ return aead_enqueue_req(jrdev, edesc->hw_desc, aead_crypt_done, req,
+ edesc);
}

static int aead_encrypt(struct aead_request *req)
@@ -1525,6 +1551,30 @@ static int aead_decrypt(struct aead_request *req)
return aead_crypt(req, false);
}

+static int aead_do_one_req(struct crypto_engine *engine, void *areq)
+{
+ struct aead_request *req = aead_request_cast(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+ struct caam_aead_req_ctx *rctx = aead_request_ctx(req);
+ struct caam_aead_request_entry *jrentry;
+ u32 *desc = rctx->edesc->hw_desc;
+ int ret;
+
+ jrentry = &rctx->edesc->jrentry;
+ jrentry->bklog = true;
+
+ ret = caam_jr_enqueue(ctx->jrdev, desc, rctx->aead_op_done, jrentry);
+
+ if (ret != -EINPROGRESS) {
+ aead_unmap(ctx->jrdev, rctx->edesc, req);
+ kfree(rctx->edesc);
+ } else {
+ ret = 0;
+ }
+
+ return ret;
+}
+
static inline int gcm_crypt(struct aead_request *req, bool encrypt)
{
struct aead_edesc *edesc;
@@ -1532,8 +1582,6 @@ static inline int gcm_crypt(struct aead_request *req, bool encrypt)
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,
@@ -1548,14 +1596,8 @@ static inline int gcm_crypt(struct aead_request *req, bool encrypt)
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_crypt_done, &edesc->jrentry);
- if (ret != -EINPROGRESS) {
- aead_unmap(jrdev, edesc, req);
- kfree(edesc);
- }
-
- return ret;
+ return aead_enqueue_req(jrdev, edesc->hw_desc, aead_crypt_done, req,
+ edesc);
}

static int gcm_encrypt(struct aead_request *req)
@@ -3385,6 +3427,10 @@ static int caam_aead_init(struct crypto_aead *tfm)
container_of(alg, struct caam_aead_alg, aead);
struct caam_ctx *ctx = crypto_aead_ctx(tfm);

+ crypto_aead_set_reqsize(tfm, sizeof(struct caam_aead_req_ctx));
+
+ ctx->enginectx.op.do_one_request = aead_do_one_req;
+
return caam_init_common(ctx, &caam_alg->caam, !caam_alg->caam.nodkp);
}

--
2.1.0
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