mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
f931551baf
Add a low-level IB driver for QLogic PCIe adapters. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
|
|
* Copyright (c) 2009 QLogic Corporation. 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 "qib.h"
|
|
|
|
/**
|
|
* qib_pio_copy - copy data to MMIO space, in multiples of 32-bits
|
|
* @to: destination, in MMIO space (must be 64-bit aligned)
|
|
* @from: source (must be 64-bit aligned)
|
|
* @count: number of 32-bit quantities to copy
|
|
*
|
|
* Copy data from kernel space to MMIO space, in multiples of 32 bits at a
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
|
* performed afterwards.
|
|
*/
|
|
void qib_pio_copy(void __iomem *to, const void *from, size_t count)
|
|
{
|
|
#ifdef CONFIG_64BIT
|
|
u64 __iomem *dst = to;
|
|
const u64 *src = from;
|
|
const u64 *end = src + (count >> 1);
|
|
|
|
while (src < end)
|
|
__raw_writeq(*src++, dst++);
|
|
if (count & 1)
|
|
__raw_writel(*(const u32 *)src, dst);
|
|
#else
|
|
u32 __iomem *dst = to;
|
|
const u32 *src = from;
|
|
const u32 *end = src + count;
|
|
|
|
while (src < end)
|
|
__raw_writel(*src++, dst++);
|
|
#endif
|
|
}
|