1 /* 2 * Copyright (c) 2009 QLogic Corporation. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * 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 OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include "qib.h" 34 35 /** 36 * qib_pio_copy - copy data to MMIO space, in multiples of 32-bits 37 * @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 copy 40 * 41 * Copy data from kernel space to MMIO space, in multiples of 32 bits at a 42 * time. Order of access is not guaranteed, nor is a memory barrier 43 * performed afterwards. 44 */ 45 void qib_pio_copy(void __iomem *to, const void *from, size_t count) 46 { 47 #ifdef CONFIG_64BIT 48 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 #else 57 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 #endif 64 } 65