cregit-Linux how code gets into the kernel

Release 4.12 include/linux/io.h

Directory: include/linux
/*
 * 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

PersonTokensPropCommitsCommitProp
Paul Mundt2395.83%150.00%
Kenji Kaneshige14.17%150.00%
Total24100.00%2100.00%

#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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Toshi Kani8100.00%1100.00%
Total8100.00%1100.00%

#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; }

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Russell King25100.00%1100.00%
Total25100.00%1100.00%


static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) { }

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PersonTokensPropCommitsCommitProp
Russell King16100.00%1100.00%
Total16100.00%1100.00%

#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); }

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Lorenzo Pieralisi23100.00%1100.00%
Total23100.00%1100.00%

#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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Andrew Lutomirski20100.00%1100.00%
Total20100.00%1100.00%


static inline void arch_phys_wc_del(int handle) { }

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PersonTokensPropCommitsCommitProp
Andrew Lutomirski9100.00%1100.00%
Total9100.00%1100.00%

#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; }

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PersonTokensPropCommitsCommitProp
Luis R. Rodriguez14100.00%1100.00%
Total14100.00%1100.00%

#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; }

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PersonTokensPropCommitsCommitProp
Dave Airlie16100.00%1100.00%
Total16100.00%1100.00%


static inline void arch_io_free_memtype_wc(resource_size_t base, resource_size_t size) { }

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PersonTokensPropCommitsCommitProp
Dave Airlie12100.00%1100.00%
Total12100.00%1100.00%

#endif #endif /* _LINUX_IO_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo7813.13%13.33%
Christoph Hellwig579.60%26.67%
Russell King477.91%13.33%
Dan J Williams396.57%13.33%
Andrew Lutomirski396.57%13.33%
Lorenzo Pieralisi386.40%13.33%
Toshi Kani345.72%13.33%
Dave Airlie345.72%13.33%
Bryan O'Sullivan305.05%13.33%
Paul Mundt305.05%13.33%
Luis R. Rodriguez233.87%13.33%
Håvard Skinnemoen203.37%13.33%
Matthew Wilcox193.20%13.33%
Abhilash Kesavan172.86%13.33%
Brice Goglin172.86%13.33%
Stephen Boyd172.86%13.33%
Emil Medve132.19%13.33%
Haren Myneni111.85%13.33%
Matthias Brugger71.18%13.33%
Brian Starkey61.01%13.33%
Andrew Morton40.67%26.67%
Al Viro30.51%13.33%
Stephen Rothwell30.51%13.33%
Kumar Gala20.34%13.33%
Kenji Kaneshige20.34%13.33%
Cristian Stoica20.34%13.33%
Andi Kleen10.17%13.33%
Uwe Kleine-König10.17%13.33%
Total594100.00%30100.00%
Directory: include/linux
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