90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2004 Topspin Communications. All rights reserved.
|
|
* Copyright (c) 2005 Cisco Systems. All rights reserved.
|
|
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
|
|
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - 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.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
|
|
#include "c2.h"
|
|
#include "c2_provider.h"
|
|
|
|
int c2_pd_alloc(struct c2_dev *c2dev, int privileged, struct c2_pd *pd)
|
|
{
|
|
u32 obj;
|
|
int ret = 0;
|
|
|
|
spin_lock(&c2dev->pd_table.lock);
|
|
obj = find_next_zero_bit(c2dev->pd_table.table, c2dev->pd_table.max,
|
|
c2dev->pd_table.last);
|
|
if (obj >= c2dev->pd_table.max)
|
|
obj = find_first_zero_bit(c2dev->pd_table.table,
|
|
c2dev->pd_table.max);
|
|
if (obj < c2dev->pd_table.max) {
|
|
pd->pd_id = obj;
|
|
__set_bit(obj, c2dev->pd_table.table);
|
|
c2dev->pd_table.last = obj+1;
|
|
if (c2dev->pd_table.last >= c2dev->pd_table.max)
|
|
c2dev->pd_table.last = 0;
|
|
} else
|
|
ret = -ENOMEM;
|
|
spin_unlock(&c2dev->pd_table.lock);
|
|
return ret;
|
|
}
|
|
|
|
void c2_pd_free(struct c2_dev *c2dev, struct c2_pd *pd)
|
|
{
|
|
spin_lock(&c2dev->pd_table.lock);
|
|
__clear_bit(pd->pd_id, c2dev->pd_table.table);
|
|
spin_unlock(&c2dev->pd_table.lock);
|
|
}
|
|
|
|
int __devinit c2_init_pd_table(struct c2_dev *c2dev)
|
|
{
|
|
|
|
c2dev->pd_table.last = 0;
|
|
c2dev->pd_table.max = c2dev->props.max_pd;
|
|
spin_lock_init(&c2dev->pd_table.lock);
|
|
c2dev->pd_table.table = kmalloc(BITS_TO_LONGS(c2dev->props.max_pd) *
|
|
sizeof(long), GFP_KERNEL);
|
|
if (!c2dev->pd_table.table)
|
|
return -ENOMEM;
|
|
bitmap_zero(c2dev->pd_table.table, c2dev->props.max_pd);
|
|
return 0;
|
|
}
|
|
|
|
void __devexit c2_cleanup_pd_table(struct c2_dev *c2dev)
|
|
{
|
|
kfree(c2dev->pd_table.table);
|
|
}
|