Release 4.12 include/linux/io.h
/*
* Copyright 2006 PathScale, Inc. All Rights Reserved.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _LINUX_IO_H
#define _LINUX_IO_H
#include <linux/types.h>
#include <linux/init.h>
#include <linux/bug.h>
#include <linux/err.h>
#include <asm/io.h>
#include <asm/page.h>
struct device;
struct resource;
__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
void __ioread32_copy(void *to, const void __iomem *from, size_t count);
void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
#ifdef CONFIG_MMU
int ioremap_page_range(unsigned long addr, unsigned long end,
phys_addr_t phys_addr, pgprot_t prot);
#else
static inline int ioremap_page_range(unsigned long addr, unsigned long end,
phys_addr_t phys_addr, pgprot_t prot)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Mundt | 23 | 95.83% | 1 | 50.00% |
| Kenji Kaneshige | 1 | 4.17% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
#endif
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
void __init ioremap_huge_init(void);
int arch_ioremap_pud_supported(void);
int arch_ioremap_pmd_supported(void);
#else
static inline void ioremap_huge_init(void) { }
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| Person | Tokens | Prop | Commits | CommitProp |
| Toshi Kani | 8 | 100.00% | 1 | 100.00% |
| Total | 8 | 100.00% | 1 | 100.00% |
#endif
/*
* Managed iomap interface
*/
#ifdef CONFIG_HAS_IOPORT_MAP
void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
unsigned int nr);
void devm_ioport_unmap(struct device *dev, void __iomem *addr);
#else
static inline void __iomem *devm_ioport_map(struct device *dev,
unsigned long port,
unsigned int nr)
{
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
#endif
#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
resource_size_t size);
void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
resource_size_t size);
void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
resource_size_t size);
void devm_iounmap(struct device *dev, void __iomem *addr);
int check_signature(const volatile void __iomem *io_addr,
const unsigned char *signature, int length);
void devm_ioremap_release(struct device *dev, void *res);
void *devm_memremap(struct device *dev, resource_size_t offset,
size_t size, unsigned long flags);
void devm_memunmap(struct device *dev, void *addr);
void *__devm_memremap_pages(struct device *dev, struct resource *res);
#ifdef CONFIG_PCI
/*
* The PCI specifications (Rev 3.0, 3.2.5 "Transaction Ordering and
* Posting") mandate non-posted configuration transactions. There is
* no ioremap API in the kernel that can guarantee non-posted write
* semantics across arches so provide a default implementation for
* mapping PCI config space that defaults to ioremap_nocache(); arches
* should override it if they have memory mapping implementations that
* guarantee non-posted writes semantics to make the memory mapping
* compliant with the PCI specification.
*/
#ifndef pci_remap_cfgspace
#define pci_remap_cfgspace pci_remap_cfgspace
static inline void __iomem *pci_remap_cfgspace(phys_addr_t offset,
size_t size)
{
return ioremap_nocache(offset, size);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lorenzo Pieralisi | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
#endif
#endif
/*
* Some systems do not have legacy ISA devices.
* /dev/port is not a valid interface on these systems.
* So for those archs, <asm/io.h> should define the following symbol.
*/
#ifndef arch_has_dev_port
#define arch_has_dev_port() (1)
#endif
/*
* Some systems (x86 without PAT) have a somewhat reliable way to mark a
* physical address range such that uncached mappings will actually
* end up write-combining. This facility should be used in conjunction
* with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
* no effect if the per-page mechanisms are functional.
* (On x86 without PAT, these functions manipulate MTRRs.)
*
* arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
* to have no effect.
*/
#ifndef arch_phys_wc_add
static inline int __must_check arch_phys_wc_add(unsigned long base,
unsigned long size)
{
return 0; /* It worked (i.e. did nothing). */
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Andrew Lutomirski | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static inline void arch_phys_wc_del(int handle)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrew Lutomirski | 9 | 100.00% | 1 | 100.00% |
| Total | 9 | 100.00% | 1 | 100.00% |
#define arch_phys_wc_add arch_phys_wc_add
#ifndef arch_phys_wc_index
static inline int arch_phys_wc_index(int handle)
{
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Luis R. Rodriguez | 14 | 100.00% | 1 | 100.00% |
| Total | 14 | 100.00% | 1 | 100.00% |
#define arch_phys_wc_index arch_phys_wc_index
#endif
#endif
enum {
/* See memremap() kernel-doc for usage description... */
MEMREMAP_WB = 1 << 0,
MEMREMAP_WT = 1 << 1,
MEMREMAP_WC = 1 << 2,
};
void *memremap(resource_size_t offset, size_t size, unsigned long flags);
void memunmap(void *addr);
/*
* On x86 PAT systems we have memory tracking that keeps track of
* the allowed mappings on memory ranges. This tracking works for
* all the in-kernel mapping APIs (ioremap*), but where the user
* wishes to map a range from a physical device into user memory
* the tracking won't be updated. This API is to be used by
* drivers which remap physical device pages into userspace,
* and wants to make sure they are mapped WC and not UC.
*/
#ifndef arch_io_reserve_memtype_wc
static inline int arch_io_reserve_memtype_wc(resource_size_t base,
resource_size_t size)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Airlie | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline void arch_io_free_memtype_wc(resource_size_t base,
resource_size_t size)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Airlie | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
#endif
#endif /* _LINUX_IO_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tejun Heo | 78 | 13.13% | 1 | 3.33% |
| Christoph Hellwig | 57 | 9.60% | 2 | 6.67% |
| Russell King | 47 | 7.91% | 1 | 3.33% |
| Dan J Williams | 39 | 6.57% | 1 | 3.33% |
| Andrew Lutomirski | 39 | 6.57% | 1 | 3.33% |
| Lorenzo Pieralisi | 38 | 6.40% | 1 | 3.33% |
| Toshi Kani | 34 | 5.72% | 1 | 3.33% |
| Dave Airlie | 34 | 5.72% | 1 | 3.33% |
| Bryan O'Sullivan | 30 | 5.05% | 1 | 3.33% |
| Paul Mundt | 30 | 5.05% | 1 | 3.33% |
| Luis R. Rodriguez | 23 | 3.87% | 1 | 3.33% |
| Håvard Skinnemoen | 20 | 3.37% | 1 | 3.33% |
| Matthew Wilcox | 19 | 3.20% | 1 | 3.33% |
| Abhilash Kesavan | 17 | 2.86% | 1 | 3.33% |
| Brice Goglin | 17 | 2.86% | 1 | 3.33% |
| Stephen Boyd | 17 | 2.86% | 1 | 3.33% |
| Emil Medve | 13 | 2.19% | 1 | 3.33% |
| Haren Myneni | 11 | 1.85% | 1 | 3.33% |
| Matthias Brugger | 7 | 1.18% | 1 | 3.33% |
| Brian Starkey | 6 | 1.01% | 1 | 3.33% |
| Andrew Morton | 4 | 0.67% | 2 | 6.67% |
| Al Viro | 3 | 0.51% | 1 | 3.33% |
| Stephen Rothwell | 3 | 0.51% | 1 | 3.33% |
| Kumar Gala | 2 | 0.34% | 1 | 3.33% |
| Kenji Kaneshige | 2 | 0.34% | 1 | 3.33% |
| Cristian Stoica | 2 | 0.34% | 1 | 3.33% |
| Andi Kleen | 1 | 0.17% | 1 | 3.33% |
| Uwe Kleine-König | 1 | 0.17% | 1 | 3.33% |
| Total | 594 | 100.00% | 30 | 100.00% |
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