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Subject[PATCH v3 1/3] crypto: engine - permit to enqueue aead_request
Date
The current crypto engine allows ablkcipher_request and ahash_request to
be enqueued. Extend this to aead_request.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
crypto/crypto_engine.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++
include/crypto/engine.h | 16 ++++++++
2 files changed, 117 insertions(+)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index 61e7c4e..3cdf051 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <crypto/engine.h>
+#include <crypto/internal/aead.h>
#include <crypto/internal/hash.h>
#include <uapi/linux/sched/types.h>
#include "internal.h"
@@ -35,6 +36,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
{
struct crypto_async_request *async_req, *backlog;
struct ahash_request *hreq;
+ struct aead_request *areq;
struct ablkcipher_request *breq;
unsigned long flags;
bool was_busy = false;
@@ -122,6 +124,22 @@ static void crypto_pump_requests(struct crypto_engine *engine,
goto req_err;
}
return;
+ case CRYPTO_ALG_TYPE_AEAD:
+ areq = aead_request_cast(engine->cur_req);
+ if (engine->prepare_aead_request) {
+ ret = engine->prepare_aead_request(engine, areq);
+ if (ret) {
+ pr_err("failed to prepare request: %d\n", ret);
+ goto req_err;
+ }
+ engine->cur_req_prepared = true;
+ }
+ ret = engine->aead_one_request(engine, areq);
+ if (ret) {
+ pr_err("failed to do aead one request from queue\n");
+ goto req_err;
+ }
+ return;
case CRYPTO_ALG_TYPE_ABLKCIPHER:
breq = ablkcipher_request_cast(engine->cur_req);
if (engine->prepare_cipher_request) {
@@ -150,6 +168,10 @@ static void crypto_pump_requests(struct crypto_engine *engine,
hreq = ahash_request_cast(engine->cur_req);
crypto_finalize_hash_request(engine, hreq, ret);
break;
+ case CRYPTO_ALG_TYPE_AEAD:
+ areq = aead_request_cast(engine->cur_req);
+ crypto_finalize_aead_request(engine, areq, ret);
+ break;
case CRYPTO_ALG_TYPE_ABLKCIPHER:
breq = ablkcipher_request_cast(engine->cur_req);
crypto_finalize_cipher_request(engine, breq, ret);
@@ -255,6 +277,48 @@ int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
EXPORT_SYMBOL_GPL(crypto_transfer_hash_request_to_engine);

/**
+ * crypto_transfer_aead_request - transfer the new request into the
+ * enginequeue
+ * @engine: the hardware engine
+ * @req: the request need to be listed into the engine queue
+ */
+int crypto_transfer_aead_request(struct crypto_engine *engine,
+ struct aead_request *req, bool need_pump)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&engine->queue_lock, flags);
+
+ if (!engine->running) {
+ spin_unlock_irqrestore(&engine->queue_lock, flags);
+ return -ESHUTDOWN;
+ }
+
+ ret = aead_enqueue_request((struct aead_queue *)&engine->queue, req);
+
+ if (!engine->busy && need_pump)
+ kthread_queue_work(engine->kworker, &engine->pump_requests);
+
+ spin_unlock_irqrestore(&engine->queue_lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_transfer_aead_request);
+
+/**
+ * crypto_transfer_aead_request_to_engine - transfer one request to list
+ * into the engine queue
+ * @engine: the hardware engine
+ * @req: the request need to be listed into the engine queue
+ */
+int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
+ struct aead_request *req)
+{
+ return crypto_transfer_aead_request(engine, req, true);
+}
+EXPORT_SYMBOL_GPL(crypto_transfer_aead_request_to_engine);
+
+/**
* crypto_finalize_cipher_request - finalize one request if the request is done
* @engine: the hardware engine
* @req: the request need to be finalized
@@ -329,6 +393,43 @@ void crypto_finalize_hash_request(struct crypto_engine *engine,
EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);

/**
+ * crypto_finalize_aead_request - finalize one request if the request is done
+ * @engine: the hardware engine
+ * @req: the request need to be finalized
+ * @err: error number
+ */
+void crypto_finalize_aead_request(struct crypto_engine *engine,
+ struct aead_request *req, int err)
+{
+ unsigned long flags;
+ bool finalize_cur_req = false;
+ int ret;
+
+ spin_lock_irqsave(&engine->queue_lock, flags);
+ if (engine->cur_req == &req->base)
+ finalize_cur_req = true;
+ spin_unlock_irqrestore(&engine->queue_lock, flags);
+
+ if (finalize_cur_req) {
+ if (engine->cur_req_prepared &&
+ engine->unprepare_aead_request) {
+ ret = engine->unprepare_aead_request(engine, req);
+ if (ret)
+ pr_err("failed to unprepare request\n");
+ }
+ spin_lock_irqsave(&engine->queue_lock, flags);
+ engine->cur_req = NULL;
+ engine->cur_req_prepared = false;
+ spin_unlock_irqrestore(&engine->queue_lock, flags);
+ }
+
+ req->base.complete(&req->base, err);
+
+ kthread_queue_work(engine->kworker, &engine->pump_requests);
+}
+EXPORT_SYMBOL_GPL(crypto_finalize_aead_request);
+
+/**
* crypto_engine_start - start the hardware engine
* @engine: the hardware engine need to be started
*
diff --git a/include/crypto/engine.h b/include/crypto/engine.h
index dd04c16..9ee1722 100644
--- a/include/crypto/engine.h
+++ b/include/crypto/engine.h
@@ -16,6 +16,7 @@
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
+#include <crypto/aead.h>
#include <crypto/algapi.h>
#include <crypto/hash.h>

@@ -43,6 +44,9 @@
* @prepare_hash_request: do some prepare if need before handle the current request
* @unprepare_hash_request: undo any work done by prepare_hash_request()
* @hash_one_request: do hash for current request
+ * @prepare_aead_request: do some prepare if need before handle the current request
+ * @unprepare_aead_request: undo any work done by prepare_aead_request()
+ * @aead_one_request: do aead for current request
* @kworker: kthread worker struct for request pump
* @pump_requests: work struct for scheduling work to the request pump
* @priv_data: the engine private data
@@ -73,10 +77,16 @@ struct crypto_engine {
struct ahash_request *req);
int (*unprepare_hash_request)(struct crypto_engine *engine,
struct ahash_request *req);
+ int (*prepare_aead_request)(struct crypto_engine *engine,
+ struct aead_request *req);
+ int (*unprepare_aead_request)(struct crypto_engine *engine,
+ struct aead_request *req);
int (*cipher_one_request)(struct crypto_engine *engine,
struct ablkcipher_request *req);
int (*hash_one_request)(struct crypto_engine *engine,
struct ahash_request *req);
+ int (*aead_one_request)(struct crypto_engine *engine,
+ struct aead_request *req);

struct kthread_worker *kworker;
struct kthread_work pump_requests;
@@ -94,10 +104,16 @@ int crypto_transfer_hash_request(struct crypto_engine *engine,
struct ahash_request *req, bool need_pump);
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
struct ahash_request *req);
+int crypto_transfer_aead_request(struct crypto_engine *engine,
+ struct aead_request *req, bool need_pump);
+int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
+ struct aead_request *req);
void crypto_finalize_cipher_request(struct crypto_engine *engine,
struct ablkcipher_request *req, int err);
void crypto_finalize_hash_request(struct crypto_engine *engine,
struct ahash_request *req, int err);
+void crypto_finalize_aead_request(struct crypto_engine *engine,
+ struct aead_request *req, int err);
int crypto_engine_start(struct crypto_engine *engine);
int crypto_engine_stop(struct crypto_engine *engine);
struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
--
2.7.4
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