/*
 * Crypto engine API
 *
 * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
 *
 * 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_ENGINE_H
#define _CRYPTO_ENGINE_H

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

#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_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
 * @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_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;

	void				*priv_data;
	struct crypto_async_request	*cur_req;
};

int crypto_transfer_cipher_request(struct crypto_engine *engine,
				   struct ablkcipher_request *req,
				   bool need_pump);
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);
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
					   struct ahash_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);
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);

#endif /* _CRYPTO_ENGINE_H */
elect></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-30 19:27:10 -0500</td></tr>
<tr><th>committer</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-31 09:13:49 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/stub_rx.c?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>79c6f448c8b79c321e4a1f31f98194e4f6b6cae7</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/usbip/stub_rx.c?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>370efda701f03cccf21e02bb1fdd3b852547d75c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/usbip/stub_rx.c?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>drivers/usb/usbip/stub_rx.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/usbip/stub_rx.c?id=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>0c744ea4f77d72b3dcebb7a8f2684633ec79be88</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/usbip/stub_rx.c?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&amp;id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff</a>)</td></tr></table>
<div class='commit-subject'>tracing: Fix hwlat kthread migration</div><div class='commit-msg'>The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'drivers/usb/usbip/stub_rx.c')</div><table summary='diffstat' class='diffstat'>