freebsd-dev/sys/dev/mlx4/doorbell.h
Hans Petter Selasky 97549c34ec Move the ConnectX-3 and ConnectX-2 driver from sys/ofed into sys/dev/mlx4
like other PCI network drivers. The sys/ofed directory is now mainly
reserved for generic infiniband code, with exception of the mthca driver.

- Add new manual page, mlx4en(4), describing how to configure and load
mlx4en.

- All relevant driver C-files are now prefixed mlx4, mlx4_en and
mlx4_ib respectivly to avoid object filename collisions when compiling
the kernel. This also fixes an issue with proper dependency file
generation for the C-files in question.

- Device mlxen is now device mlx4en and depends on device mlx4, see
mlx4en(4). Only the network device name remains unchanged.

- The mlx4 and mlx4en modules are now built by default on i386 and
amd64 targets. Only building the mlx4ib module depends on
WITH_OFED=YES .

Sponsored by:	Mellanox Technologies
2016-09-30 08:23:06 +00:00

87 lines
2.8 KiB
C

/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. 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 MLX4_DOORBELL_H
#define MLX4_DOORBELL_H
#include <linux/types.h>
#include <linux/io.h>
#define MLX4_SEND_DOORBELL 0x14
#define MLX4_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 MLX4_DECLARE_DOORBELL_LOCK(name)
#define MLX4_INIT_DOORBELL_LOCK(ptr) do { } while (0)
#define MLX4_GET_DOORBELL_LOCK(ptr) (NULL)
static inline void mlx4_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 MLX4_DECLARE_DOORBELL_LOCK(name) spinlock_t name;
#define MLX4_INIT_DOORBELL_LOCK(ptr) spin_lock_init(ptr)
#define MLX4_GET_DOORBELL_LOCK(ptr) (ptr)
static inline void mlx4_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], (u8 *)dest + 4);
spin_unlock_irqrestore(doorbell_lock, flags);
}
#endif
#endif /* MLX4_DOORBELL_H */