mirror of
https://github.com/torvalds/linux
synced 2024-07-23 19:49:59 +00:00
052ddf7b86
Rename the fbdev mmap helper fb_pgprotect() to pgprot_framebuffer(). The helper sets VMA page-access flags for framebuffers in device I/O memory. Also clean up the helper's parameters and return value. Instead of the VMA instance, pass the individial parameters separately: existing page-access flags, the VMAs start and end addresses and the offset in the underlying device memory rsp file. Return the new page-access flags. These changes align pgprot_framebuffer() with other pgprot_() functions. v4: * fix commit message (Christophe) v3: * rename fb_pgprotect() to pgprot_framebuffer() (Arnd) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230922080636.26762-3-tzimmermann@suse.de
136 lines
2.8 KiB
C
136 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_GENERIC_FB_H_
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#define __ASM_GENERIC_FB_H_
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/*
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* Only include this header file from your architecture's <asm/fb.h>.
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*/
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#include <linux/io.h>
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#include <linux/mm_types.h>
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#include <linux/pgtable.h>
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struct fb_info;
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#ifndef pgprot_framebuffer
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#define pgprot_framebuffer pgprot_framebuffer
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static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
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unsigned long vm_start, unsigned long vm_end,
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unsigned long offset)
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{
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return pgprot_writecombine(prot);
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}
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#endif
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#ifndef fb_is_primary_device
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#define fb_is_primary_device fb_is_primary_device
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static inline int fb_is_primary_device(struct fb_info *info)
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{
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return 0;
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}
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#endif
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/*
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* I/O helpers for the framebuffer. Prefer these functions over their
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* regular counterparts. The regular I/O functions provide in-order
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* access and swap bytes to/from little-endian ordering. Neither is
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* required for framebuffers. Instead, the helpers read and write
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* raw framebuffer data. Independent operations can be reordered for
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* improved performance.
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*/
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#ifndef fb_readb
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static inline u8 fb_readb(const volatile void __iomem *addr)
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{
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return __raw_readb(addr);
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}
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#define fb_readb fb_readb
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#endif
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#ifndef fb_readw
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static inline u16 fb_readw(const volatile void __iomem *addr)
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{
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return __raw_readw(addr);
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}
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#define fb_readw fb_readw
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#endif
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#ifndef fb_readl
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static inline u32 fb_readl(const volatile void __iomem *addr)
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{
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return __raw_readl(addr);
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}
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#define fb_readl fb_readl
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#endif
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#ifndef fb_readq
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#if defined(__raw_readq)
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static inline u64 fb_readq(const volatile void __iomem *addr)
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{
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return __raw_readq(addr);
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}
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#define fb_readq fb_readq
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#endif
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#endif
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#ifndef fb_writeb
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static inline void fb_writeb(u8 b, volatile void __iomem *addr)
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{
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__raw_writeb(b, addr);
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}
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#define fb_writeb fb_writeb
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#endif
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#ifndef fb_writew
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static inline void fb_writew(u16 b, volatile void __iomem *addr)
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{
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__raw_writew(b, addr);
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}
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#define fb_writew fb_writew
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#endif
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#ifndef fb_writel
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static inline void fb_writel(u32 b, volatile void __iomem *addr)
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{
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__raw_writel(b, addr);
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}
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#define fb_writel fb_writel
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#endif
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#ifndef fb_writeq
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#if defined(__raw_writeq)
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static inline void fb_writeq(u64 b, volatile void __iomem *addr)
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{
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__raw_writeq(b, addr);
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}
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#define fb_writeq fb_writeq
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#endif
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#endif
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#ifndef fb_memcpy_fromio
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static inline void fb_memcpy_fromio(void *to, const volatile void __iomem *from, size_t n)
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{
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memcpy_fromio(to, from, n);
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}
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#define fb_memcpy_fromio fb_memcpy_fromio
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#endif
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#ifndef fb_memcpy_toio
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static inline void fb_memcpy_toio(volatile void __iomem *to, const void *from, size_t n)
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{
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memcpy_toio(to, from, n);
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}
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#define fb_memcpy_toio fb_memcpy_toio
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#endif
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#ifndef fb_memset
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static inline void fb_memset_io(volatile void __iomem *addr, int c, size_t n)
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{
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memset_io(addr, c, n);
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}
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#define fb_memset fb_memset_io
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#endif
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#endif /* __ASM_GENERIC_FB_H_ */
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