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/*
* Copyright (c) 2000, 2011 Mellanox Technology 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.
*/
#ifndef BITMAP_H
#define BITMAP_H
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <errno.h>
#include "mlx5.h"
/* Only ia64 requires this */
#ifdef __ia64__
#define MLX5_SHM_ADDR ((void *)0x8000000000000000UL)
#define MLX5_SHMAT_FLAGS (SHM_RND)
#else
#define MLX5_SHM_ADDR NULL
#define MLX5_SHMAT_FLAGS 0
#endif
#define BITS_PER_LONG (8 * sizeof(long))
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_LONG)
#ifndef HPAGE_SIZE
#define HPAGE_SIZE (2UL * 1024 * 1024)
#endif
#define MLX5_SHM_LENGTH HPAGE_SIZE
#define MLX5_Q_CHUNK_SIZE 32768
#define MLX5_SHM_NUM_REGION 64
static inline unsigned long mlx5_ffz(uint32_t word)
{
return __builtin_ffs(~word) - 1;
}
static inline uint32_t mlx5_find_first_zero_bit(const unsigned long *addr,
uint32_t size)
{
const unsigned long *p = addr;
uint32_t result = 0;
unsigned long tmp;
while (size & ~(BITS_PER_LONG - 1)) {
tmp = *(p++);
if (~tmp)
goto found;
result += BITS_PER_LONG;
size -= BITS_PER_LONG;
}
if (!size)
return result;
tmp = (*p) | (~0UL << size);
if (tmp == (uint32_t)~0UL) /* Are any bits zero? */
return result + size; /* Nope. */
found:
return result + mlx5_ffz(tmp);
}
static inline void mlx5_set_bit(unsigned int nr, unsigned long *addr)
{
addr[(nr / BITS_PER_LONG)] |= (1 << (nr % BITS_PER_LONG));
}
static inline void mlx5_clear_bit(unsigned int nr, unsigned long *addr)
{
addr[(nr / BITS_PER_LONG)] &= ~(1 << (nr % BITS_PER_LONG));
}
static inline int mlx5_test_bit(unsigned int nr, const unsigned long *addr)
{
return !!(addr[(nr / BITS_PER_LONG)] & (1 << (nr % BITS_PER_LONG)));
}
#endif
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