Re: [PATCH 2/6] crypto: engine - Permit to enqueue all async requests

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(adding my tested by)


On 10/01/18 15:19, Fabien DESSENNE wrote:
> On 03/01/18 21:11, Corentin Labbe wrote:
>> 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@xxxxxxxxx>

Tested-by: Fabien Dessenne <fabien.dessenne@xxxxxx>

>> ---
>>    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);
> Do not export this function which is a static one.
>
>>    
>>    /**
>> - * 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);
>>    
> Please add this EXPORTed function:
>
> crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
> struct aead_request *req)
>
>>    /**
>> - * 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,
> shall be static
>
>> +			     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);
> Add
> crypto_finalize_aead_request(struct crypto_engine *engine, struct
> aead_request *req, int err)
>
>>    
>> 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);
> + transfer_aead
>
>> +void crypto_finalize_request(struct crypto_engine *engine,
>> +			     struct crypto_async_request *req, int err);
> static (+move to  .c file?)
>
>> +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);
> + finalize_aead
>
>>    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);
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