[deliverable/linux.git] / include / crypto / algapi.h

/*
 * Cryptographic API for algorithms (i.e., low-level API).
 *
 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */
#ifndef _CRYPTO_ALGAPI_H
#define _CRYPTO_ALGAPI_H

#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/skbuff.h>

struct crypto_aead;
struct crypto_instance;
struct module;
struct rtattr;
struct seq_file;

struct crypto_type {
	unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
	unsigned int (*extsize)(struct crypto_alg *alg);
	int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
	int (*init_tfm)(struct crypto_tfm *tfm);
	void (*show)(struct seq_file *m, struct crypto_alg *alg);
	int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
	struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
	void (*free)(struct crypto_instance *inst);

	unsigned int type;
	unsigned int maskclear;
	unsigned int maskset;
	unsigned int tfmsize;
};

struct crypto_instance {
	struct crypto_alg alg;

	struct crypto_template *tmpl;
	struct hlist_node list;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct crypto_template {
	struct list_head list;
	struct hlist_head instances;
	struct module *module;

	struct crypto_instance *(*alloc)(struct rtattr **tb);
	void (*free)(struct crypto_instance *inst);
	int (*create)(struct crypto_template *tmpl, struct rtattr **tb);

	char name[CRYPTO_MAX_ALG_NAME];
};

struct crypto_spawn {
	struct list_head list;
	struct crypto_alg *alg;
	struct crypto_instance *inst;
	const struct crypto_type *frontend;
	u32 mask;
};

struct crypto_queue {
	struct list_head list;
	struct list_head *backlog;

	unsigned int qlen;
	unsigned int max_qlen;
};

struct scatter_walk {
	struct scatterlist *sg;
	unsigned int offset;
};

struct blkcipher_walk {
	union {
		struct {
			struct page *page;
			unsigned long offset;
		} phys;

		struct {
			u8 *page;
			u8 *addr;
		} virt;
	} src, dst;

	struct scatter_walk in;
	unsigned int nbytes;

	struct scatter_walk out;
	unsigned int total;

	void *page;
	u8 *buffer;
	u8 *iv;
	unsigned int ivsize;

	int flags;
	unsigned int walk_blocksize;
	unsigned int cipher_blocksize;
	unsigned int alignmask;
};

struct ablkcipher_walk {
	struct {
		struct page *page;
		unsigned int offset;
	} src, dst;

	struct scatter_walk	in;
	unsigned int		nbytes;
	struct scatter_walk	out;
	unsigned int		total;
	struct list_head	buffers;
	u8			*iv_buffer;
	u8			*iv;
	int			flags;
	unsigned int		blocksize;
};

#define ENGINE_NAME_LEN	30
/*
 * struct crypto_engine - crypto hardware engine
 * @name: the engine name
 * @idling: the engine is entering idle state
 * @busy: request pump is busy
 * @running: the engine is on working
 * @cur_req_prepared: current request is prepared
 * @list: link with the global crypto engine list
 * @queue_lock: spinlock to syncronise access to request queue
 * @queue: the crypto queue of the engine
 * @rt: whether this queue is set to run as a realtime task
 * @prepare_crypt_hardware: a request will soon arrive from the queue
 * so the subsystem requests the driver to prepare the hardware
 * by issuing this call
 * @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_request: do some prepare if need before handle the current request
 * @unprepare_request: undo any work done by prepare_message()
 * @crypt_one_request: do encryption for current request
 * @kworker: thread struct for request pump
 * @kworker_task: pointer to task for request pump kworker thread
 * @pump_requests: work struct for scheduling work to the request pump
 * @priv_data: the engine private data
 * @cur_req: the current request which is on processing
 */
struct crypto_engine {
	char			name[ENGINE_NAME_LEN];
	bool			idling;
	bool			busy;
	bool			running;
	bool			cur_req_prepared;

	struct list_head	list;
	spinlock_t		queue_lock;
	struct crypto_queue	queue;

	bool			rt;

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

	int (*prepare_request)(struct crypto_engine *engine,
			       struct ablkcipher_request *req);
	int (*unprepare_request)(struct crypto_engine *engine,
				 struct ablkcipher_request *req);
	int (*crypt_one_request)(struct crypto_engine *engine,
				 struct ablkcipher_request *req);

	struct kthread_worker           kworker;
	struct task_struct              *kworker_task;
	struct kthread_work             pump_requests;

	void				*priv_data;
	struct ablkcipher_request	*cur_req;
};

int crypto_transfer_request(struct crypto_engine *engine,
			    struct ablkcipher_request *req, bool need_pump);
int crypto_transfer_request_to_engine(struct crypto_engine *engine,
				      struct ablkcipher_request *req);
void crypto_finalize_request(struct crypto_engine *engine,
			     struct ablkcipher_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);
int crypto_engine_exit(struct crypto_engine *engine);

extern const struct crypto_type crypto_ablkcipher_type;
extern const struct crypto_type crypto_blkcipher_type;

void crypto_mod_put(struct crypto_alg *alg);

int crypto_register_template(struct crypto_template *tmpl);
void crypto_unregister_template(struct crypto_template *tmpl);
struct crypto_template *crypto_lookup_template(const char *name);

int crypto_register_instance(struct crypto_template *tmpl,
			     struct crypto_instance *inst);
int crypto_unregister_instance(struct crypto_instance *inst);

int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
		      struct crypto_instance *inst, u32 mask);
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
		       struct crypto_instance *inst,
		       const struct crypto_type *frontend);
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
		      u32 type, u32 mask);

void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
				    u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);

static inline void crypto_set_spawn(struct crypto_spawn *spawn,
				    struct crypto_instance *inst)
{
	spawn->inst = inst;
}

struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta);
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
				    const struct crypto_type *frontend,
				    u32 type, u32 mask);

static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
						 u32 type, u32 mask)
{
	return crypto_attr_alg2(rta, NULL, type, mask);
}

int crypto_attr_u32(struct rtattr *rta, u32 *num);
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
			     unsigned int head);
struct crypto_instance *crypto_alloc_instance(const char *name,
					      struct crypto_alg *alg);

void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
int crypto_enqueue_request(struct crypto_queue *queue,
			   struct crypto_async_request *request);
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
{
	return queue->qlen;
}

/* These functions require the input/output to be aligned as u32. */
void crypto_inc(u8 *a, unsigned int size);
void crypto_xor(u8 *dst, const u8 *src, unsigned int size);

int blkcipher_walk_done(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk, int err);
int blkcipher_walk_virt(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_phys(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
			      struct blkcipher_walk *walk,
			      unsigned int blocksize);
int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
				   struct blkcipher_walk *walk,
				   struct crypto_aead *tfm,
				   unsigned int blocksize);

int ablkcipher_walk_done(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk, int err);
int ablkcipher_walk_phys(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk);
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);

static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
	return PTR_ALIGN(crypto_tfm_ctx(tfm),
			 crypto_tfm_alg_alignmask(tfm) + 1);
}

static inline struct crypto_instance *crypto_tfm_alg_instance(
	struct crypto_tfm *tfm)
{
	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
}

static inline void *crypto_instance_ctx(struct crypto_instance *inst)
{
	return inst->__ctx;
}

static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	struct crypto_ablkcipher *tfm)
{
	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
}

static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_cipher *crypto_spawn_cipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
{
	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
}

static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
				       struct scatterlist *dst,
				       struct scatterlist *src,
				       unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
}

static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
					struct scatterlist *dst,
					struct scatterlist *src,
					unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
	INIT_LIST_HEAD(&walk->buffers);
}

static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
{
	if (unlikely(!list_empty(&walk->buffers)))
		__ablkcipher_walk_complete(walk);
}

static inline struct crypto_async_request *crypto_get_backlog(
	struct crypto_queue *queue)
{
	return queue->backlog == &queue->list ? NULL :
	       container_of(queue->backlog, struct crypto_async_request, list);
}

static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
					     struct ablkcipher_request *request)
{
	return crypto_enqueue_request(queue, &request->base);
}

static inline struct ablkcipher_request *ablkcipher_dequeue_request(
	struct crypto_queue *queue)
{
	return ablkcipher_request_cast(crypto_dequeue_request(queue));
}

static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
{
	return req->__ctx;
}

static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
					  struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
}

static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
						     u32 type, u32 mask)
{
	return crypto_attr_alg(tb[1], type, mask);
}

/*
 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
 * Otherwise returns zero.
 */
static inline int crypto_requires_sync(u32 type, u32 mask)
{
	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
}

noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);

/**
 * crypto_memneq - Compare two areas of memory without leaking
 *		   timing information.
 *
 * @a: One area of memory
 * @b: Another area of memory
 * @size: The size of the area.
 *
 * Returns 0 when data is equal, 1 otherwise.
 */
static inline int crypto_memneq(const void *a, const void *b, size_t size)
{
	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
}

static inline void crypto_yield(u32 flags)
{
	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
		cond_resched();
}

#endif	/* _CRYPTO_ALGAPI_H */
Commit	Line	Data
	1	/*
	2	* Cryptographic API for algorithms (i.e., low-level API).
	3	*
	4	* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	*/
	12	#ifndef _CRYPTO_ALGAPI_H
	13	#define _CRYPTO_ALGAPI_H
	14
	15	#include <linux/crypto.h>
	16	#include <linux/list.h>
	17	#include <linux/kernel.h>
	18	#include <linux/kthread.h>
	19	#include <linux/skbuff.h>
	20
	21	struct crypto_aead;
	22	struct crypto_instance;
	23	struct module;
	24	struct rtattr;
	25	struct seq_file;
	26
	27	struct crypto_type {
	28	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
	29	unsigned int (extsize)(struct crypto_alg alg);
	30	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
	31	int (init_tfm)(struct crypto_tfm tfm);
	32	void (show)(struct seq_file m, struct crypto_alg *alg);
	33	int (report)(struct sk_buff skb, struct crypto_alg *alg);
	34	struct crypto_alg (lookup)(const char *name, u32 type, u32 mask);
	35	void (free)(struct crypto_instance inst);
	36
	37	unsigned int type;
	38	unsigned int maskclear;
	39	unsigned int maskset;
	40	unsigned int tfmsize;
	41	};
	42
	43	struct crypto_instance {
	44	struct crypto_alg alg;
	45
	46	struct crypto_template *tmpl;
	47	struct hlist_node list;
	48
	49	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	50	};
	51
	52	struct crypto_template {
	53	struct list_head list;
	54	struct hlist_head instances;
	55	struct module *module;
	56
	57	struct crypto_instance (alloc)(struct rtattr **tb);
	58	void (free)(struct crypto_instance inst);
	59	int (create)(struct crypto_template tmpl, struct rtattr **tb);
	60
	61	char name[CRYPTO_MAX_ALG_NAME];
	62	};
	63
	64	struct crypto_spawn {
	65	struct list_head list;
	66	struct crypto_alg *alg;
	67	struct crypto_instance *inst;
	68	const struct crypto_type *frontend;
	69	u32 mask;
	70	};
	71
	72	struct crypto_queue {
	73	struct list_head list;
	74	struct list_head *backlog;
	75
	76	unsigned int qlen;
	77	unsigned int max_qlen;
	78	};
	79
	80	struct scatter_walk {
	81	struct scatterlist *sg;
	82	unsigned int offset;
	83	};
	84
	85	struct blkcipher_walk {
	86	union {
	87	struct {
	88	struct page *page;
	89	unsigned long offset;
	90	} phys;
	91
	92	struct {
	93	u8 *page;
	94	u8 *addr;
	95	} virt;
	96	} src, dst;
	97
	98	struct scatter_walk in;
	99	unsigned int nbytes;
	100
	101	struct scatter_walk out;
	102	unsigned int total;
	103
	104	void *page;
	105	u8 *buffer;
	106	u8 *iv;
	107	unsigned int ivsize;
	108
	109	int flags;
	110	unsigned int walk_blocksize;
	111	unsigned int cipher_blocksize;
	112	unsigned int alignmask;
	113	};
	114
	115	struct ablkcipher_walk {
	116	struct {
	117	struct page *page;
	118	unsigned int offset;
	119	} src, dst;
	120
	121	struct scatter_walk in;
	122	unsigned int nbytes;
	123	struct scatter_walk out;
	124	unsigned int total;
	125	struct list_head buffers;
	126	u8 *iv_buffer;
	127	u8 *iv;
	128	int flags;
	129	unsigned int blocksize;
	130	};
	131
	132	#define ENGINE_NAME_LEN 30
	133	/*
	134	* struct crypto_engine - crypto hardware engine
	135	* @name: the engine name
	136	* @idling: the engine is entering idle state
	137	* @busy: request pump is busy
	138	* @running: the engine is on working
	139	* @cur_req_prepared: current request is prepared
	140	* @list: link with the global crypto engine list
	141	* @queue_lock: spinlock to syncronise access to request queue
	142	* @queue: the crypto queue of the engine
	143	* @rt: whether this queue is set to run as a realtime task
	144	* @prepare_crypt_hardware: a request will soon arrive from the queue
	145	* so the subsystem requests the driver to prepare the hardware
	146	* by issuing this call
	147	* @unprepare_crypt_hardware: there are currently no more requests on the
	148	* queue so the subsystem notifies the driver that it may relax the
	149	* hardware by issuing this call
	150	* @prepare_request: do some prepare if need before handle the current request
	151	* @unprepare_request: undo any work done by prepare_message()
	152	* @crypt_one_request: do encryption for current request
	153	* @kworker: thread struct for request pump
	154	* @kworker_task: pointer to task for request pump kworker thread
	155	* @pump_requests: work struct for scheduling work to the request pump
	156	* @priv_data: the engine private data
	157	* @cur_req: the current request which is on processing
	158	*/
	159	struct crypto_engine {
	160	char name[ENGINE_NAME_LEN];
	161	bool idling;
	162	bool busy;
	163	bool running;
	164	bool cur_req_prepared;
	165
	166	struct list_head list;
	167	spinlock_t queue_lock;
	168	struct crypto_queue queue;
	169
	170	bool rt;
	171
	172	int (prepare_crypt_hardware)(struct crypto_engine engine);
	173	int (unprepare_crypt_hardware)(struct crypto_engine engine);
	174
	175	int (prepare_request)(struct crypto_engine engine,
	176	struct ablkcipher_request *req);
	177	int (unprepare_request)(struct crypto_engine engine,
	178	struct ablkcipher_request *req);
	179	int (crypt_one_request)(struct crypto_engine engine,
	180	struct ablkcipher_request *req);
	181
	182	struct kthread_worker kworker;
	183	struct task_struct *kworker_task;
	184	struct kthread_work pump_requests;
	185
	186	void *priv_data;
	187	struct ablkcipher_request *cur_req;
	188	};
	189
	190	int crypto_transfer_request(struct crypto_engine *engine,
	191	struct ablkcipher_request *req, bool need_pump);
	192	int crypto_transfer_request_to_engine(struct crypto_engine *engine,
	193	struct ablkcipher_request *req);
	194	void crypto_finalize_request(struct crypto_engine *engine,
	195	struct ablkcipher_request *req, int err);
	196	int crypto_engine_start(struct crypto_engine *engine);
	197	int crypto_engine_stop(struct crypto_engine *engine);
	198	struct crypto_engine crypto_engine_alloc_init(struct device dev, bool rt);
	199	int crypto_engine_exit(struct crypto_engine *engine);
	200
	201	extern const struct crypto_type crypto_ablkcipher_type;
	202	extern const struct crypto_type crypto_blkcipher_type;
	203
	204	void crypto_mod_put(struct crypto_alg *alg);
	205
	206	int crypto_register_template(struct crypto_template *tmpl);
	207	void crypto_unregister_template(struct crypto_template *tmpl);
	208	struct crypto_template crypto_lookup_template(const char name);
	209
	210	int crypto_register_instance(struct crypto_template *tmpl,
	211	struct crypto_instance *inst);
	212	int crypto_unregister_instance(struct crypto_instance *inst);
	213
	214	int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,
	215	struct crypto_instance *inst, u32 mask);
	216	int crypto_init_spawn2(struct crypto_spawn spawn, struct crypto_alg alg,
	217	struct crypto_instance *inst,
	218	const struct crypto_type *frontend);
	219	int crypto_grab_spawn(struct crypto_spawn spawn, const char name,
	220	u32 type, u32 mask);
	221
	222	void crypto_drop_spawn(struct crypto_spawn *spawn);
	223	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
	224	u32 mask);
	225	void crypto_spawn_tfm2(struct crypto_spawn spawn);
	226
	227	static inline void crypto_set_spawn(struct crypto_spawn *spawn,
	228	struct crypto_instance *inst)
	229	{
	230	spawn->inst = inst;
	231	}
	232
	233	struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb);
	234	int crypto_check_attr_type(struct rtattr **tb, u32 type);
	235	const char crypto_attr_alg_name(struct rtattr rta);
	236	struct crypto_alg crypto_attr_alg2(struct rtattr rta,
	237	const struct crypto_type *frontend,
	238	u32 type, u32 mask);
	239
	240	static inline struct crypto_alg crypto_attr_alg(struct rtattr rta,
	241	u32 type, u32 mask)
	242	{
	243	return crypto_attr_alg2(rta, NULL, type, mask);
	244	}
	245
	246	int crypto_attr_u32(struct rtattr rta, u32 num);
	247	void crypto_alloc_instance2(const char name, struct crypto_alg *alg,
	248	unsigned int head);
	249	struct crypto_instance crypto_alloc_instance(const char name,
	250	struct crypto_alg *alg);
	251
	252	void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
	253	int crypto_enqueue_request(struct crypto_queue *queue,
	254	struct crypto_async_request *request);
	255	struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue);
	256	int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm);
	257	static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
	258	{
	259	return queue->qlen;
	260	}
	261
	262	/* These functions require the input/output to be aligned as u32. */
	263	void crypto_inc(u8 *a, unsigned int size);
	264	void crypto_xor(u8 dst, const u8 src, unsigned int size);
	265
	266	int blkcipher_walk_done(struct blkcipher_desc *desc,
	267	struct blkcipher_walk *walk, int err);
	268	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	269	struct blkcipher_walk *walk);
	270	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	271	struct blkcipher_walk *walk);
	272	int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
	273	struct blkcipher_walk *walk,
	274	unsigned int blocksize);
	275	int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
	276	struct blkcipher_walk *walk,
	277	struct crypto_aead *tfm,
	278	unsigned int blocksize);
	279
	280	int ablkcipher_walk_done(struct ablkcipher_request *req,
	281	struct ablkcipher_walk *walk, int err);
	282	int ablkcipher_walk_phys(struct ablkcipher_request *req,
	283	struct ablkcipher_walk *walk);
	284	void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
	285
	286	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
	287	{
	288	return PTR_ALIGN(crypto_tfm_ctx(tfm),
	289	crypto_tfm_alg_alignmask(tfm) + 1);
	290	}
	291
	292	static inline struct crypto_instance *crypto_tfm_alg_instance(
	293	struct crypto_tfm *tfm)
	294	{
	295	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
	296	}
	297
	298	static inline void crypto_instance_ctx(struct crypto_instance inst)
	299	{
	300	return inst->__ctx;
	301	}
	302
	303	static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	304	struct crypto_ablkcipher *tfm)
	305	{
	306	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
	307	}
	308
	309	static inline void crypto_ablkcipher_ctx(struct crypto_ablkcipher tfm)
	310	{
	311	return crypto_tfm_ctx(&tfm->base);
	312	}
	313
	314	static inline void crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher tfm)
	315	{
	316	return crypto_tfm_ctx_aligned(&tfm->base);
	317	}
	318
	319	static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	320	struct crypto_spawn *spawn)
	321	{
	322	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
	323	u32 mask = CRYPTO_ALG_TYPE_MASK;
	324
	325	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
	326	}
	327
	328	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	329	{
	330	return crypto_tfm_ctx(&tfm->base);
	331	}
	332
	333	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	334	{
	335	return crypto_tfm_ctx_aligned(&tfm->base);
	336	}
	337
	338	static inline struct crypto_cipher *crypto_spawn_cipher(
	339	struct crypto_spawn *spawn)
	340	{
	341	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	342	u32 mask = CRYPTO_ALG_TYPE_MASK;
	343
	344	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	345	}
	346
	347	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	348	{
	349	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	350	}
	351
	352	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	353	struct scatterlist *dst,
	354	struct scatterlist *src,
	355	unsigned int nbytes)
	356	{
	357	walk->in.sg = src;
	358	walk->out.sg = dst;
	359	walk->total = nbytes;
	360	}
	361
	362	static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
	363	struct scatterlist *dst,
	364	struct scatterlist *src,
	365	unsigned int nbytes)
	366	{
	367	walk->in.sg = src;
	368	walk->out.sg = dst;
	369	walk->total = nbytes;
	370	INIT_LIST_HEAD(&walk->buffers);
	371	}
	372
	373	static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
	374	{
	375	if (unlikely(!list_empty(&walk->buffers)))
	376	__ablkcipher_walk_complete(walk);
	377	}
	378
	379	static inline struct crypto_async_request *crypto_get_backlog(
	380	struct crypto_queue *queue)
	381	{
	382	return queue->backlog == &queue->list ? NULL :
	383	container_of(queue->backlog, struct crypto_async_request, list);
	384	}
	385
	386	static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
	387	struct ablkcipher_request *request)
	388	{
	389	return crypto_enqueue_request(queue, &request->base);
	390	}
	391
	392	static inline struct ablkcipher_request *ablkcipher_dequeue_request(
	393	struct crypto_queue *queue)
	394	{
	395	return ablkcipher_request_cast(crypto_dequeue_request(queue));
	396	}
	397
	398	static inline void ablkcipher_request_ctx(struct ablkcipher_request req)
	399	{
	400	return req->__ctx;
	401	}
	402
	403	static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
	404	struct crypto_ablkcipher *tfm)
	405	{
	406	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
	407	}
	408
	409	static inline struct crypto_alg crypto_get_attr_alg(struct rtattr *tb,
	410	u32 type, u32 mask)
	411	{
	412	return crypto_attr_alg(tb[1], type, mask);
	413	}
	414
	415	/*
	416	* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
	417	* Otherwise returns zero.
	418	*/
	419	static inline int crypto_requires_sync(u32 type, u32 mask)
	420	{
	421	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
	422	}
	423
	424	noinline unsigned long __crypto_memneq(const void a, const void b, size_t size);
	425
	426	/**
	427	* crypto_memneq - Compare two areas of memory without leaking
	428	* timing information.
	429	*
	430	* @a: One area of memory
	431	* @b: Another area of memory
	432	* @size: The size of the area.
	433	*
	434	* Returns 0 when data is equal, 1 otherwise.
	435	*/
	436	static inline int crypto_memneq(const void a, const void b, size_t size)
	437	{
	438	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
	439	}
	440
	441	static inline void crypto_yield(u32 flags)
	442	{
	443	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
	444	cond_resched();
	445	}
	446
	447	#endif /* _CRYPTO_ALGAPI_H */