diff options
Diffstat (limited to 'include/linux/io.h')
| -rw-r--r-- | include/linux/io.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h index fb5a99800e77..de64c1e53612 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -20,10 +20,13 @@ #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 __iowrite64_copy(void __iomem *to, const void *from, size_t count); @@ -80,6 +83,27 @@ 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_ZONE_DEVICE +void *devm_memremap_pages(struct device *dev, struct resource *res); +#else +static inline void *devm_memremap_pages(struct device *dev, struct resource *res) +{ + /* + * Fail attempts to call devm_memremap_pages() without + * ZONE_DEVICE support enabled, this requires callers to fall + * back to plain devm_memremap() based on config + */ + WARN_ON_ONCE(1); + return ERR_PTR(-ENXIO); +} +#endif + /* * Some systems do not have legacy ISA devices. * /dev/port is not a valid interface on these systems. @@ -121,4 +145,13 @@ static inline int arch_phys_wc_index(int handle) #endif #endif +enum { + /* See memremap() kernel-doc for usage description... */ + MEMREMAP_WB = 1 << 0, + MEMREMAP_WT = 1 << 1, +}; + +void *memremap(resource_size_t offset, size_t size, unsigned long flags); +void memunmap(void *addr); + #endif /* _LINUX_IO_H */ |