mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
3.4 KiB
109 lines
3.4 KiB
/* |
|
* 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. |
|
*/ |
|
|
|
#include <linux/types.h> |
|
|
|
#define MTHCA_RD_DOORBELL 0x00 |
|
#define MTHCA_SEND_DOORBELL 0x10 |
|
#define MTHCA_RECEIVE_DOORBELL 0x18 |
|
#define MTHCA_CQ_DOORBELL 0x20 |
|
#define MTHCA_EQ_DOORBELL 0x28 |
|
|
|
#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 MTHCA_DECLARE_DOORBELL_LOCK(name) |
|
#define MTHCA_INIT_DOORBELL_LOCK(ptr) do { } while (0) |
|
#define MTHCA_GET_DOORBELL_LOCK(ptr) (NULL) |
|
|
|
static inline void mthca_write64_raw(__be64 val, void __iomem *dest) |
|
{ |
|
__raw_writeq((__force u64) val, dest); |
|
} |
|
|
|
static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest, |
|
spinlock_t *doorbell_lock) |
|
{ |
|
__raw_writeq((__force u64) cpu_to_be64((u64) hi << 32 | lo), dest); |
|
} |
|
|
|
static inline void mthca_write_db_rec(__be32 val[2], __be32 *db) |
|
{ |
|
*(u64 *) db = *(u64 *) val; |
|
} |
|
|
|
#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 MTHCA_DECLARE_DOORBELL_LOCK(name) spinlock_t name; |
|
#define MTHCA_INIT_DOORBELL_LOCK(ptr) spin_lock_init(ptr) |
|
#define MTHCA_GET_DOORBELL_LOCK(ptr) (ptr) |
|
|
|
static inline void mthca_write64_raw(__be64 val, void __iomem *dest) |
|
{ |
|
__raw_writel(((__force u32 *) &val)[0], dest); |
|
__raw_writel(((__force u32 *) &val)[1], dest + 4); |
|
} |
|
|
|
static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest, |
|
spinlock_t *doorbell_lock) |
|
{ |
|
unsigned long flags; |
|
|
|
hi = (__force u32) cpu_to_be32(hi); |
|
lo = (__force u32) cpu_to_be32(lo); |
|
|
|
spin_lock_irqsave(doorbell_lock, flags); |
|
__raw_writel(hi, dest); |
|
__raw_writel(lo, dest + 4); |
|
spin_unlock_irqrestore(doorbell_lock, flags); |
|
} |
|
|
|
static inline void mthca_write_db_rec(__be32 val[2], __be32 *db) |
|
{ |
|
db[0] = val[0]; |
|
wmb(); |
|
db[1] = val[1]; |
|
} |
|
|
|
#endif
|
|
|