Commit 8d908226 authored by Iuliana Prodan's avatar Iuliana Prodan Committed by Herbert Xu
Browse files

crypto: engine - support for batch requests 



Added support for batch requests, per crypto engine.
A new callback is added, do_batch_requests, which executes a
batch of requests. This has the crypto_engine structure as argument
(for cases when more than one crypto-engine is used).
The crypto_engine_alloc_init_and_set function, initializes
crypto-engine, but also, sets the do_batch_requests callback.
On crypto_pump_requests, if do_batch_requests callback is
implemented in a driver, this will be executed. The link between
the requests will be done in driver, if possible.
do_batch_requests is available only if the hardware has support
for multiple request.

Signed-off-by: default avatarIuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 6a89f492

crypto/crypto_engine.c

+26 −1
Original line number Diff line number Diff line
@@ -227,6 +227,18 @@ retry: 


out:

	spin_unlock_irqrestore(&engine->queue_lock, flags);



	/*

	 * Batch requests is possible only if

	 * hardware can enqueue multiple requests

	 */

	if (engine->do_batch_requests) {

		ret = engine->do_batch_requests(engine);

		if (ret)

			dev_err(engine->dev, "failed to do batch requests: %d\n",

				ret);

	}



	return;

}
@@ -456,6 +468,12 @@ EXPORT_SYMBOL_GPL(crypto_engine_stop); 
 * crypto-engine queue.

 * @dev: the device attached with one hardware engine

 * @retry_support: whether hardware has support for retry mechanism

 * @cbk_do_batch: pointer to a callback function to be invoked when executing a

 *                a batch of requests.

 *                This has the form:

 *                callback(struct crypto_engine *engine)

 *                where:

 *                @engine: the crypto engine structure.

 * @rt: whether this queue is set to run as a realtime task

 * @qlen: maximum size of the crypto-engine queue

 *
@@ -464,6 +482,7 @@ EXPORT_SYMBOL_GPL(crypto_engine_stop); 
 */

struct crypto_engine *crypto_engine_alloc_init_and_set(struct device *dev,

						       bool retry_support,

						       int (*cbk_do_batch)(struct crypto_engine *engine),

						       bool rt, int qlen)

{

	struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
@@ -483,6 +502,12 @@ struct crypto_engine *crypto_engine_alloc_init_and_set(struct device *dev, 
	engine->idling = false;

	engine->retry_support = retry_support;

	engine->priv_data = dev;

	/*

	 * Batch requests is possible only if

	 * hardware has support for retry mechanism.

	 */

	engine->do_batch_requests = retry_support ? cbk_do_batch : NULL;



	snprintf(engine->name, sizeof(engine->name),

		 "%s-engine", dev_name(dev));
@@ -516,7 +541,7 @@ EXPORT_SYMBOL_GPL(crypto_engine_alloc_init_and_set); 
 */

struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)

{

	return crypto_engine_alloc_init_and_set(dev, false, rt,

	return crypto_engine_alloc_init_and_set(dev, false, NULL, rt,

						CRYPTO_ENGINE_MAX_QLEN);

}

EXPORT_SYMBOL_GPL(crypto_engine_alloc_init);

include/crypto/engine.h

+5 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ 
 * @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

 * @do_batch_requests: execute a batch of requests. Depends on multiple

 * requests support.

 * @kworker: kthread worker struct for request pump

 * @pump_requests: work struct for scheduling work to the request pump

 * @priv_data: the engine private data
@@ -59,6 +61,8 @@ struct crypto_engine { 


	int (*prepare_crypt_hardware)(struct crypto_engine *engine);

	int (*unprepare_crypt_hardware)(struct crypto_engine *engine);

	int (*do_batch_requests)(struct crypto_engine *engine);





	struct kthread_worker           *kworker;

	struct kthread_work             pump_requests;
@@ -107,6 +111,7 @@ int crypto_engine_stop(struct crypto_engine *engine); 
struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);

struct crypto_engine *crypto_engine_alloc_init_and_set(struct device *dev,

						       bool retry_support,

						       int (*cbk_do_batch)(struct crypto_engine *engine),

						       bool rt, int qlen);

int crypto_engine_exit(struct crypto_engine *engine);

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