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/*
* Copyright (c) 2007 Cisco, 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 DOORBELL_H
#define DOORBELL_H
#include <stdint.h>
#include <pthread.h>
#include "mlx4.h"
#include "mmio.h"
struct mlx4_context;
#if SIZEOF_LONG == 8
#if __BYTE_ORDER == __LITTLE_ENDIAN
# define MLX4_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0])
#elif __BYTE_ORDER == __BIG_ENDIAN
# define MLX4_PAIR_TO_64(val) ((uint64_t) val[0] << 32 | val[1])
#else
# error __BYTE_ORDER not defined
#endif
static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset)
{
mmio_writeq((unsigned long)(ctx->uar + offset), MLX4_PAIR_TO_64(val));
}
#else
static inline void mlx4_write64(uint32_t val[2], struct mlx4_context *ctx, int offset)
{
pthread_spin_lock(&ctx->uar_lock);
mmio_writel((unsigned long)(ctx->uar + offset), val[0]);
mmio_writel((unsigned long)(ctx->uar + offset + 4), val[1]);
pthread_spin_unlock(&ctx->uar_lock);
}
#endif
#endif /* DOORBELL_H */
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