mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 09:12:07 +00:00
e7bc47b166
Complete switching the __iowriteXX_copy() routines over to use #define and arch provided inline/macro functions instead of weak symbols. S390 has an implementation that simply calls another memcpy function. Inline this so the callers don't have to do two jumps. Link: https://lore.kernel.org/r/3-v3-1893cd8b9369+1925-mlx5_arm_wc_jgg@nvidia.com Acked-by: Niklas Schnelle <schnelle@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2006 PathScale, Inc. All Rights Reserved.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/io.h>
|
|
|
|
/**
|
|
* __iowrite32_copy - copy data to MMIO space, in 32-bit units
|
|
* @to: destination, in MMIO space (must be 32-bit aligned)
|
|
* @from: source (must be 32-bit aligned)
|
|
* @count: number of 32-bit quantities to copy
|
|
*
|
|
* Copy data from kernel space to MMIO space, in units of 32 bits at a
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
|
* performed afterwards.
|
|
*/
|
|
#ifndef __iowrite32_copy
|
|
void __iowrite32_copy(void __iomem *to, const void *from, size_t count)
|
|
{
|
|
u32 __iomem *dst = to;
|
|
const u32 *src = from;
|
|
const u32 *end = src + count;
|
|
|
|
while (src < end)
|
|
__raw_writel(*src++, dst++);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__iowrite32_copy);
|
|
#endif
|
|
|
|
/**
|
|
* __ioread32_copy - copy data from MMIO space, in 32-bit units
|
|
* @to: destination (must be 32-bit aligned)
|
|
* @from: source, in MMIO space (must be 32-bit aligned)
|
|
* @count: number of 32-bit quantities to copy
|
|
*
|
|
* Copy data from MMIO space to kernel space, in units of 32 bits at a
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
|
* performed afterwards.
|
|
*/
|
|
void __ioread32_copy(void *to, const void __iomem *from, size_t count)
|
|
{
|
|
u32 *dst = to;
|
|
const u32 __iomem *src = from;
|
|
const u32 __iomem *end = src + count;
|
|
|
|
while (src < end)
|
|
*dst++ = __raw_readl(src++);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__ioread32_copy);
|
|
|
|
/**
|
|
* __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
|
|
* @to: destination, in MMIO space (must be 64-bit aligned)
|
|
* @from: source (must be 64-bit aligned)
|
|
* @count: number of 64-bit quantities to copy
|
|
*
|
|
* Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
|
* performed afterwards.
|
|
*/
|
|
#ifndef __iowrite64_copy
|
|
void __iowrite64_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;
|
|
|
|
while (src < end)
|
|
__raw_writeq(*src++, dst++);
|
|
#else
|
|
__iowrite32_copy(to, from, count * 2);
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL_GPL(__iowrite64_copy);
|
|
#endif
|