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Subject[PATCH 2/6] crypto: engine - Permit to enqueue all async requests
Date
The crypto engine could actually only enqueue hash and ablkcipher request.
This patch permit it to enqueue any type of crypto_async_request.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
---
crypto/crypto_engine.c | 230 ++++++++++++++++++++++++------------------------
include/crypto/engine.h | 59 +++++++------
2 files changed, 148 insertions(+), 141 deletions(-)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index 61e7c4e02fd2..036270b61648 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -15,7 +15,6 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <crypto/engine.h>
-#include <crypto/internal/hash.h>
#include <uapi/linux/sched/types.h>
#include "internal.h"

@@ -34,11 +33,10 @@ static void crypto_pump_requests(struct crypto_engine *engine,
bool in_kthread)
{
struct crypto_async_request *async_req, *backlog;
- struct ahash_request *hreq;
- struct ablkcipher_request *breq;
unsigned long flags;
bool was_busy = false;
- int ret, rtype;
+ int ret;
+ struct crypto_engine_reqctx *enginectx;

spin_lock_irqsave(&engine->queue_lock, flags);

@@ -94,7 +92,6 @@ static void crypto_pump_requests(struct crypto_engine *engine,

spin_unlock_irqrestore(&engine->queue_lock, flags);

- rtype = crypto_tfm_alg_type(engine->cur_req->tfm);
/* Until here we get the request need to be encrypted successfully */
if (!was_busy && engine->prepare_crypt_hardware) {
ret = engine->prepare_crypt_hardware(engine);
@@ -104,57 +101,31 @@ static void crypto_pump_requests(struct crypto_engine *engine,
}
}

- switch (rtype) {
- case CRYPTO_ALG_TYPE_AHASH:
- hreq = ahash_request_cast(engine->cur_req);
- if (engine->prepare_hash_request) {
- ret = engine->prepare_hash_request(engine, hreq);
- if (ret) {
- dev_err(engine->dev, "failed to prepare request: %d\n",
- ret);
- goto req_err;
- }
- engine->cur_req_prepared = true;
- }
- ret = engine->hash_one_request(engine, hreq);
- if (ret) {
- dev_err(engine->dev, "failed to hash 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) {
- ret = engine->prepare_cipher_request(engine, breq);
- if (ret) {
- dev_err(engine->dev, "failed to prepare request: %d\n",
- ret);
- goto req_err;
- }
- engine->cur_req_prepared = true;
- }
- ret = engine->cipher_one_request(engine, breq);
+ enginectx = crypto_tfm_ctx(async_req->tfm);
+
+ if (enginectx->op.prepare_request) {
+ ret = enginectx->op.prepare_request(engine, async_req);
if (ret) {
- dev_err(engine->dev, "failed to cipher one request from queue\n");
+ dev_err(engine->dev, "failed to prepare request: %d\n",
+ ret);
goto req_err;
}
- return;
- default:
- dev_err(engine->dev, "failed to prepare request of unknown type\n");
- return;
+ engine->cur_req_prepared = true;
+ }
+ if (!enginectx->op.do_one_request) {
+ dev_err(engine->dev, "failed to do request\n");
+ ret = -EINVAL;
+ goto req_err;
+ }
+ ret = enginectx->op.do_one_request(engine, async_req);
+ if (ret) {
+ dev_err(engine->dev, "Failed to do one request from queue: %d\n", ret);
+ goto req_err;
}
+ return;

req_err:
- switch (rtype) {
- case CRYPTO_ALG_TYPE_AHASH:
- hreq = ahash_request_cast(engine->cur_req);
- crypto_finalize_hash_request(engine, hreq, ret);
- break;
- case CRYPTO_ALG_TYPE_ABLKCIPHER:
- breq = ablkcipher_request_cast(engine->cur_req);
- crypto_finalize_cipher_request(engine, breq, ret);
- break;
- }
+ crypto_finalize_request(engine, async_req, ret);
return;

out:
@@ -170,13 +141,12 @@ static void crypto_pump_work(struct kthread_work *work)
}

/**
- * crypto_transfer_cipher_request - transfer the new request into the
- * enginequeue
+ * crypto_transfer_request - transfer the new request into the engine queue
* @engine: the hardware engine
* @req: the request need to be listed into the engine queue
*/
-int crypto_transfer_cipher_request(struct crypto_engine *engine,
- struct ablkcipher_request *req,
+static int crypto_transfer_request(struct crypto_engine *engine,
+ struct crypto_async_request *req,
bool need_pump)
{
unsigned long flags;
@@ -189,7 +159,7 @@ int crypto_transfer_cipher_request(struct crypto_engine *engine,
return -ESHUTDOWN;
}

- ret = ablkcipher_enqueue_request(&engine->queue, req);
+ ret = crypto_enqueue_request(&engine->queue, req);

if (!engine->busy && need_pump)
kthread_queue_work(engine->kworker, &engine->pump_requests);
@@ -197,85 +167,97 @@ int crypto_transfer_cipher_request(struct crypto_engine *engine,
spin_unlock_irqrestore(&engine->queue_lock, flags);
return ret;
}
-EXPORT_SYMBOL_GPL(crypto_transfer_cipher_request);
+EXPORT_SYMBOL_GPL(crypto_transfer_request);

/**
- * crypto_transfer_cipher_request_to_engine - transfer one request to list
+ * crypto_transfer_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
*/
+static int crypto_transfer_request_to_engine(struct crypto_engine *engine,
+ struct crypto_async_request *req)
+{
+ return crypto_transfer_request(engine, req, true);
+}
+
+/**
+ * crypto_transfer_cipher_request_to_engine - transfer one ablkcipher_request
+ * to list into the engine queue
+ * @engine: the hardware engine
+ * @req: the request need to be listed into the engine queue
+ * TODO: Remove this function when skcipher conversion is finished
+ */
int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,
struct ablkcipher_request *req)
{
- return crypto_transfer_cipher_request(engine, req, true);
+ return crypto_transfer_request_to_engine(engine, &req->base);
}
EXPORT_SYMBOL_GPL(crypto_transfer_cipher_request_to_engine);

/**
- * crypto_transfer_hash_request - transfer the new request into the
- * enginequeue
+ * crypto_transfer_skcipher_request_to_engine - transfer one skcipher_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_hash_request(struct crypto_engine *engine,
- struct ahash_request *req, bool need_pump)
+int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
+ struct skcipher_request *req)
{
- 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 = ahash_enqueue_request(&engine->queue, req);
-
- if (!engine->busy && need_pump)
- kthread_queue_work(engine->kworker, &engine->pump_requests);
+ return crypto_transfer_request_to_engine(engine, &req->base);
+}
+EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_request_to_engine);

- spin_unlock_irqrestore(&engine->queue_lock, flags);
- return ret;
+/**
+ * crypto_transfer_akcipher_request_to_engine - transfer one akcipher_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_akcipher_request_to_engine(struct crypto_engine *engine,
+ struct akcipher_request *req)
+{
+ return crypto_transfer_request_to_engine(engine, &req->base);
}
-EXPORT_SYMBOL_GPL(crypto_transfer_hash_request);
+EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_request_to_engine);

/**
- * crypto_transfer_hash_request_to_engine - transfer one request to list
- * into the engine queue
+ * crypto_transfer_hash_request_to_engine - transfer one ahash_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_hash_request_to_engine(struct crypto_engine *engine,
struct ahash_request *req)
{
- return crypto_transfer_hash_request(engine, req, true);
+ return crypto_transfer_request_to_engine(engine, &req->base);
}
EXPORT_SYMBOL_GPL(crypto_transfer_hash_request_to_engine);

/**
- * crypto_finalize_cipher_request - finalize one request if the request is done
+ * crypto_finalize_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_cipher_request(struct crypto_engine *engine,
- struct ablkcipher_request *req, int err)
+void crypto_finalize_request(struct crypto_engine *engine,
+ struct crypto_async_request *req, int err)
{
unsigned long flags;
bool finalize_cur_req = false;
int ret;
+ struct crypto_engine_reqctx *enginectx;

spin_lock_irqsave(&engine->queue_lock, flags);
- if (engine->cur_req == &req->base)
+ if (engine->cur_req == req)
finalize_cur_req = true;
spin_unlock_irqrestore(&engine->queue_lock, flags);

if (finalize_cur_req) {
+ enginectx = crypto_tfm_ctx(req->tfm);
if (engine->cur_req_prepared &&
- engine->unprepare_cipher_request) {
- ret = engine->unprepare_cipher_request(engine, req);
+ enginectx->op.unprepare_request) {
+ ret = enginectx->op.unprepare_request(engine, req);
if (ret)
dev_err(engine->dev, "failed to unprepare request\n");
}
@@ -285,46 +267,64 @@ void crypto_finalize_cipher_request(struct crypto_engine *engine,
spin_unlock_irqrestore(&engine->queue_lock, flags);
}

- req->base.complete(&req->base, err);
+ req->complete(req, err);

kthread_queue_work(engine->kworker, &engine->pump_requests);
}
-EXPORT_SYMBOL_GPL(crypto_finalize_cipher_request);

/**
- * crypto_finalize_hash_request - finalize one request if the request is done
+ * crypto_finalize_cipher_request - finalize one ablkcipher_request if
+ * the request is done
* @engine: the hardware engine
* @req: the request need to be finalized
* @err: error number
*/
-void crypto_finalize_hash_request(struct crypto_engine *engine,
- struct ahash_request *req, int err)
+void crypto_finalize_cipher_request(struct crypto_engine *engine,
+ struct ablkcipher_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);
+ return crypto_finalize_request(engine, &req->base, err);
+}
+EXPORT_SYMBOL_GPL(crypto_finalize_cipher_request);

- if (finalize_cur_req) {
- if (engine->cur_req_prepared &&
- engine->unprepare_hash_request) {
- ret = engine->unprepare_hash_request(engine, req);
- if (ret)
- dev_err(engine->dev, "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);
- }
+/**
+ * crypto_finalize_skcipher_request - finalize one skcipher_request if
+ * the request is done
+ * @engine: the hardware engine
+ * @req: the request need to be finalized
+ * @err: error number
+ */
+void crypto_finalize_skcipher_request(struct crypto_engine *engine,
+ struct skcipher_request *req, int err)
+{
+ return crypto_finalize_request(engine, &req->base, err);
+}
+EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_request);

- req->base.complete(&req->base, err);
+/**
+ * crypto_finalize_akcipher_request - finalize one akcipher_request if
+ * the request is done
+ * @engine: the hardware engine
+ * @req: the request need to be finalized
+ * @err: error number
+ */
+void crypto_finalize_akcipher_request(struct crypto_engine *engine,
+ struct akcipher_request *req, int err)
+{
+ return crypto_finalize_request(engine, &req->base, err);
+}
+EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_request);

- kthread_queue_work(engine->kworker, &engine->pump_requests);
+/**
+ * crypto_finalize_hash_request - finalize one ahash_request if
+ * the request is done
+ * @engine: the hardware engine
+ * @req: the request need to be finalized
+ * @err: error number
+ */
+void crypto_finalize_hash_request(struct crypto_engine *engine,
+ struct ahash_request *req, int err)
+{
+ return crypto_finalize_request(engine, &req->base, err);
}
EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);

diff --git a/include/crypto/engine.h b/include/crypto/engine.h
index dd04c1699b51..1ea7cbe92eaf 100644
--- a/include/crypto/engine.h
+++ b/include/crypto/engine.h
@@ -17,7 +17,9 @@
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <crypto/algapi.h>
+#include <crypto/akcipher.h>
#include <crypto/hash.h>
+#include <crypto/skcipher.h>

#define ENGINE_NAME_LEN 30
/*
@@ -37,12 +39,6 @@
* @unprepare_crypt_hardware: there are currently no more requests on the
* queue so the subsystem notifies the driver that it may relax the
* hardware by issuing this call
- * @prepare_cipher_request: do some prepare if need before handle the current request
- * @unprepare_cipher_request: undo any work done by prepare_cipher_request()
- * @cipher_one_request: do encryption for current request
- * @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
* @kworker: kthread worker struct for request pump
* @pump_requests: work struct for scheduling work to the request pump
* @priv_data: the engine private data
@@ -65,19 +61,6 @@ struct crypto_engine {
int (*prepare_crypt_hardware)(struct crypto_engine *engine);
int (*unprepare_crypt_hardware)(struct crypto_engine *engine);

- int (*prepare_cipher_request)(struct crypto_engine *engine,
- struct ablkcipher_request *req);
- int (*unprepare_cipher_request)(struct crypto_engine *engine,
- struct ablkcipher_request *req);
- int (*prepare_hash_request)(struct crypto_engine *engine,
- struct ahash_request *req);
- int (*unprepare_hash_request)(struct crypto_engine *engine,
- struct ahash_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);
-
struct kthread_worker *kworker;
struct kthread_work pump_requests;

@@ -85,19 +68,43 @@ struct crypto_engine {
struct crypto_async_request *cur_req;
};

-int crypto_transfer_cipher_request(struct crypto_engine *engine,
- struct ablkcipher_request *req,
- bool need_pump);
+/*
+ * struct crypto_engine_op - crypto hardware engine operations
+ * @prepare__request: do some prepare if need before handle the current request
+ * @unprepare_request: undo any work done by prepare_request()
+ * @do_one_request: do encryption for current request
+ */
+struct crypto_engine_op {
+ int (*prepare_request)(struct crypto_engine *engine,
+ void *areq);
+ int (*unprepare_request)(struct crypto_engine *engine,
+ void *areq);
+ int (*do_one_request)(struct crypto_engine *engine,
+ void *areq);
+};
+
+struct crypto_engine_reqctx {
+ struct crypto_engine_op op;
+};
+
+int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
+ struct akcipher_request *req);
int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,
- struct ablkcipher_request *req);
-int crypto_transfer_hash_request(struct crypto_engine *engine,
- struct ahash_request *req, bool need_pump);
+ struct ablkcipher_request *req);
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
- struct ahash_request *req);
+ struct ahash_request *req);
+int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
+ struct skcipher_request *req);
+void crypto_finalize_request(struct crypto_engine *engine,
+ struct crypto_async_request *req, int err);
+void crypto_finalize_akcipher_request(struct crypto_engine *engine,
+ struct akcipher_request *req, int err);
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_skcipher_request(struct crypto_engine *engine,
+ struct skcipher_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);
--
2.13.6
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