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65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
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/*
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* Copyright (c) 2009 QLogic Corporation. 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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#include "qib.h"
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/**
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* qib_pio_copy - copy data to MMIO space, in multiples of 32-bits
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* @to: destination, in MMIO space (must be 64-bit aligned)
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* @from: source (must be 64-bit aligned)
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* @count: number of 32-bit quantities to copy
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*
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* Copy data from kernel space to MMIO space, in multiples of 32 bits at a
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* time. Order of access is not guaranteed, nor is a memory barrier
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* performed afterwards.
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*/
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void qib_pio_copy(void __iomem *to, const void *from, size_t count)
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{
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#ifdef CONFIG_64BIT
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u64 __iomem *dst = to;
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const u64 *src = from;
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const u64 *end = src + (count >> 1);
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while (src < end)
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__raw_writeq(*src++, dst++);
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if (count & 1)
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__raw_writel(*(const u32 *)src, dst);
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#else
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u32 __iomem *dst = to;
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const u32 *src = from;
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const u32 *end = src + count;
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while (src < end)
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__raw_writel(*src++, dst++);
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#endif
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}
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