5fe9dec0d0
Make use of the blue flame registers allocator at mlx5_ib. Since blue flame was not really supported we remove all the code that is related to blue flame and we let all consumers to use the same blue flame register. Once blue flame is supported we will add the code. As part of this patch we also move the definition of struct mlx5_bf to mlx5_ib.h as it is only used by mlx5_ib. Signed-off-by: Eli Cohen <eli@mellanox.com> Reviewed-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/*
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* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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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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#ifndef MLX5_DOORBELL_H
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#define MLX5_DOORBELL_H
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#define MLX5_BF_OFFSET 0x800
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#define MLX5_CQ_DOORBELL 0x20
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#if BITS_PER_LONG == 64
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/* Assume that we can just write a 64-bit doorbell atomically. s390
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* actually doesn't have writeq() but S/390 systems don't even have
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* PCI so we won't worry about it.
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*/
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#define MLX5_DECLARE_DOORBELL_LOCK(name)
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#define MLX5_INIT_DOORBELL_LOCK(ptr) do { } while (0)
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#define MLX5_GET_DOORBELL_LOCK(ptr) (NULL)
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static inline void mlx5_write64(__be32 val[2], void __iomem *dest,
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spinlock_t *doorbell_lock)
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{
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__raw_writeq(*(u64 *)val, dest);
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}
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#else
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/* Just fall back to a spinlock to protect the doorbell if
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* BITS_PER_LONG is 32 -- there's no portable way to do atomic 64-bit
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* MMIO writes.
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*/
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#define MLX5_DECLARE_DOORBELL_LOCK(name) spinlock_t name;
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#define MLX5_INIT_DOORBELL_LOCK(ptr) spin_lock_init(ptr)
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#define MLX5_GET_DOORBELL_LOCK(ptr) (ptr)
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static inline void mlx5_write64(__be32 val[2], void __iomem *dest,
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spinlock_t *doorbell_lock)
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{
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unsigned long flags;
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if (doorbell_lock)
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spin_lock_irqsave(doorbell_lock, flags);
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__raw_writel((__force u32) val[0], dest);
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__raw_writel((__force u32) val[1], dest + 4);
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if (doorbell_lock)
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spin_unlock_irqrestore(doorbell_lock, flags);
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}
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#endif
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#endif /* MLX5_DOORBELL_H */
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