diff options
author | Ralph Campbell <ralph.campbell@qlogic.com> | 2010-05-23 21:44:54 -0700 |
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committer | Roland Dreier <rolandd@cisco.com> | 2010-05-23 21:44:54 -0700 |
commit | f931551bafe1f10ded7f5282e2aa162c267a2e5d (patch) | |
tree | e81b4656a8116abf5fd0bc0bbc46560aff536159 /drivers/infiniband/hw/qib/qib_pio_copy.c | |
parent | 9a6edb60ec10d86b1025a0cdad68fd89f1ddaf02 (diff) | |
download | op-kernel-dev-f931551bafe1f10ded7f5282e2aa162c267a2e5d.zip op-kernel-dev-f931551bafe1f10ded7f5282e2aa162c267a2e5d.tar.gz |
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 0000000..10b8c44 --- /dev/null +++ b/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 +} |