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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
44 lines
998 B
C
44 lines
998 B
C
/*
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* Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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*/
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#include <linux/fb.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/vgaarb.h>
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#include <asm/fb.h>
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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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pgprot_val(prot) &= ~_PAGE_CACHE_MASK;
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if (boot_cpu_data.x86 > 3)
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pgprot_val(prot) |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
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return prot;
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}
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EXPORT_SYMBOL(pgprot_framebuffer);
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int fb_is_primary_device(struct fb_info *info)
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{
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struct device *device = info->device;
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struct pci_dev *pci_dev;
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if (!device || !dev_is_pci(device))
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return 0;
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pci_dev = to_pci_dev(device);
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if (pci_dev == vga_default_device())
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return 1;
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return 0;
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}
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EXPORT_SYMBOL(fb_is_primary_device);
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MODULE_LICENSE("GPL");
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