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1/*2 * Copyright (c) 2009 QLogic Corporation. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include "qib.h"34 35/**36 * qib_pio_copy - copy data to MMIO space, in multiples of 32-bits37 * @to: destination, in MMIO space (must be 64-bit aligned)38 * @from: source (must be 64-bit aligned)39 * @count: number of 32-bit quantities to copy40 *41 * Copy data from kernel space to MMIO space, in multiples of 32 bits at a42 * time. Order of access is not guaranteed, nor is a memory barrier43 * performed afterwards.44 */45void qib_pio_copy(void __iomem *to, const void *from, size_t count)46{47#ifdef CONFIG_64BIT48 u64 __iomem *dst = to;49 const u64 *src = from;50 const u64 *end = src + (count >> 1);51 52 while (src < end)53 __raw_writeq(*src++, dst++);54 if (count & 1)55 __raw_writel(*(const u32 *)src, dst);56#else57 u32 __iomem *dst = to;58 const u32 *src = from;59 const u32 *end = src + count;60 61 while (src < end)62 __raw_writel(*src++, dst++);63#endif64}65