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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/infiniband/hw/qib/qib_pio_copy.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/infiniband/hw/qib/qib_pio_copy.c')
-rw-r--r-- | kernel/drivers/infiniband/hw/qib/qib_pio_copy.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/drivers/infiniband/hw/qib/qib_pio_copy.c b/kernel/drivers/infiniband/hw/qib/qib_pio_copy.c new file mode 100644 index 000000000..10b8c444d --- /dev/null +++ b/kernel/drivers/infiniband/hw/qib/qib_pio_copy.c @@ -0,0 +1,64 @@ +/* + * 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 +} |