2011-03-21 09:58:24 +00:00
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/*
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2017-08-02 16:00:30 +00:00
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* Copyright (c) 2012 Mellanox Technologies, Inc. All rights reserved.
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2011-03-21 09:58:24 +00:00
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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2017-08-02 16:00:30 +00:00
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2011-03-21 09:58:24 +00:00
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#ifndef DOORBELL_H
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#define DOORBELL_H
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2017-08-02 16:00:30 +00:00
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#include <stdint.h>
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#include "mlx5.h"
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#if SIZEOF_LONG == 8
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2011-03-21 09:58:24 +00:00
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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2017-08-02 16:00:30 +00:00
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# define MLX5_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0])
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2011-03-21 09:58:24 +00:00
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#elif __BYTE_ORDER == __BIG_ENDIAN
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2017-08-02 16:00:30 +00:00
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# define MLX5_PAIR_TO_64(val) ((uint64_t) val[0] << 32 | val[1])
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2011-03-21 09:58:24 +00:00
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#else
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# error __BYTE_ORDER not defined
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#endif
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2017-08-02 16:00:30 +00:00
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static inline void mlx5_write64(uint32_t val[2], void *dest, struct mlx5_spinlock *lock)
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2011-03-21 09:58:24 +00:00
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{
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2017-08-02 16:00:30 +00:00
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*(volatile uint64_t *)dest = MLX5_PAIR_TO_64(val);
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2011-03-21 09:58:24 +00:00
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}
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#else
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2017-08-02 16:00:30 +00:00
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static inline void mlx5_write64(uint32_t val[2], void *dest, struct mlx5_spinlock *lock)
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2011-03-21 09:58:24 +00:00
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{
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2017-08-02 16:00:30 +00:00
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mlx5_spin_lock(lock);
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*(volatile uint32_t *)dest = val[0];
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*(volatile uint32_t *)(dest + 4) = val[1];
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mlx5_spin_unlock(lock);
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2011-03-21 09:58:24 +00:00
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}
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#endif
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#endif /* DOORBELL_H */
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