diff options
author | Ralph Campbell <ralph.campbell@qlogic.com> | 2010-05-24 00:44:54 -0400 |
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committer | Roland Dreier <rolandd@cisco.com> | 2010-05-24 00:44:54 -0400 |
commit | f931551bafe1f10ded7f5282e2aa162c267a2e5d (patch) | |
tree | e81b4656a8116abf5fd0bc0bbc46560aff536159 /drivers/infiniband/hw/qib/qib_pio_copy.c | |
parent | 9a6edb60ec10d86b1025a0cdad68fd89f1ddaf02 (diff) |
IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters
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>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_pio_copy.c')
-rw-r--r-- | drivers/infiniband/hw/qib/qib_pio_copy.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_pio_copy.c b/drivers/infiniband/hw/qib/qib_pio_copy.c new file mode 100644 index 00000000000..10b8c444dd3 --- /dev/null +++ b/drivers/infiniband/hw/qib/qib_pio_copy.c | |||
@@ -0,0 +1,64 @@ | |||
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 | } | ||