mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Jiri Pirko](/assets/img/avatar_default.png)
This introduces a infrastructure for management of linear priority areas. Priority order in an array matters, however order of items inside a priority group does not matter. As an initial implementation, L-sort algorithm is used. It is quite trivial. More advanced algorithm called P-sort will be introduced as a follow-up. The infrastructure is prepared for other algos. Alongside this, a testing module is introduced as well. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/*
|
|
* include/linux/parman.h - Manager for linear priority array areas
|
|
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
|
|
* Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _PARMAN_H
|
|
#define _PARMAN_H
|
|
|
|
#include <linux/list.h>
|
|
|
|
enum parman_algo_type {
|
|
PARMAN_ALGO_TYPE_LSORT,
|
|
};
|
|
|
|
struct parman_item {
|
|
struct list_head list;
|
|
unsigned long index;
|
|
};
|
|
|
|
struct parman_prio {
|
|
struct list_head list;
|
|
struct list_head item_list;
|
|
unsigned long priority;
|
|
};
|
|
|
|
struct parman_ops {
|
|
unsigned long base_count;
|
|
unsigned long resize_step;
|
|
int (*resize)(void *priv, unsigned long new_count);
|
|
void (*move)(void *priv, unsigned long from_index,
|
|
unsigned long to_index, unsigned long count);
|
|
enum parman_algo_type algo;
|
|
};
|
|
|
|
struct parman;
|
|
|
|
struct parman *parman_create(const struct parman_ops *ops, void *priv);
|
|
void parman_destroy(struct parman *parman);
|
|
void parman_prio_init(struct parman *parman, struct parman_prio *prio,
|
|
unsigned long priority);
|
|
void parman_prio_fini(struct parman_prio *prio);
|
|
int parman_item_add(struct parman *parman, struct parman_prio *prio,
|
|
struct parman_item *item);
|
|
void parman_item_remove(struct parman *parman, struct parman_prio *prio,
|
|
struct parman_item *item);
|
|
|
|
#endif
|