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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
* Copyright(c) 2019-2020 Realtek Corporation
*/
#ifndef __RTW89_UTIL_H__
#define __RTW89_UTIL_H__
#include "core.h"
#define rtw89_iterate_vifs_bh(rtwdev, iterator, data) \
ieee80211_iterate_active_interfaces_atomic((rtwdev)->hw, \
IEEE80211_IFACE_ITER_NORMAL, iterator, data)
/* call this function with rtwdev->mutex is held */
#define rtw89_for_each_rtwvif(rtwdev, rtwvif) \
list_for_each_entry(rtwvif, &(rtwdev)->rtwvifs_list, list)
/* The result of negative dividend and positive divisor is undefined, but it
* should be one case of round-down or round-up. So, make it round-down if the
* result is round-up.
* Note: the maximum value of divisor is 0x7FFF_FFFF, because we cast it to
* signed value to make compiler to use signed divide instruction.
*/
static inline s32 s32_div_u32_round_down(s32 dividend, u32 divisor, s32 *remainder)
{
s32 i_divisor = (s32)divisor;
s32 i_remainder;
s32 quotient;
quotient = dividend / i_divisor;
i_remainder = dividend % i_divisor;
if (i_remainder < 0) {
quotient--;
i_remainder += i_divisor;
}
if (remainder)
*remainder = i_remainder;
return quotient;
}
static inline s32 s32_div_u32_round_closest(s32 dividend, u32 divisor)
{
return s32_div_u32_round_down(dividend + divisor / 2, divisor, NULL);
}
static inline void ether_addr_copy_mask(u8 *dst, const u8 *src, u8 mask)
{
int i;
eth_zero_addr(dst);
for (i = 0; i < ETH_ALEN; i++) {
if (mask & BIT(i))
dst[i] = src[i];
}
}
#endif
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