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