7b9b93a8dd
While at it bump some copyright dates. MFC after: 1 week Sponsored by: Mellanox Technologies
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/*-
|
|
* Copyright (c) 2013-2017, Mellanox Technologies, Ltd. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef MLX5_DOORBELL_H
|
|
#define MLX5_DOORBELL_H
|
|
|
|
#define MLX5_BF_OFFSET 0x800
|
|
#define MLX5_CQ_DOORBELL 0x20
|
|
|
|
#if BITS_PER_LONG == 64
|
|
/* Assume that we can just write a 64-bit doorbell atomically. s390
|
|
* actually doesn't have writeq() but S/390 systems don't even have
|
|
* PCI so we won't worry about it.
|
|
*/
|
|
|
|
#define MLX5_DECLARE_DOORBELL_LOCK(name)
|
|
#define MLX5_INIT_DOORBELL_LOCK(ptr) do { } while (0)
|
|
#define MLX5_GET_DOORBELL_LOCK(ptr) (NULL)
|
|
|
|
static inline void mlx5_write64(__be32 val[2], void __iomem *dest,
|
|
spinlock_t *doorbell_lock)
|
|
{
|
|
__raw_writeq(*(u64 *)val, dest);
|
|
}
|
|
|
|
#else
|
|
|
|
/* Just fall back to a spinlock to protect the doorbell if
|
|
* BITS_PER_LONG is 32 -- there's no portable way to do atomic 64-bit
|
|
* MMIO writes.
|
|
*/
|
|
|
|
#define MLX5_DECLARE_DOORBELL_LOCK(name) spinlock_t name;
|
|
#define MLX5_INIT_DOORBELL_LOCK(ptr) spin_lock_init(ptr)
|
|
#define MLX5_GET_DOORBELL_LOCK(ptr) (ptr)
|
|
|
|
static inline void mlx5_write64(__be32 val[2], void __iomem *dest,
|
|
spinlock_t *doorbell_lock)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(doorbell_lock, flags);
|
|
__raw_writel((__force u32) val[0], dest);
|
|
__raw_writel((__force u32) val[1], dest + 4);
|
|
spin_unlock_irqrestore(doorbell_lock, flags);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* MLX5_DOORBELL_H */
|