| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com> |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file COPYING in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/screen_info.h> |
| 13 | #include <linux/vgaarb.h> |
| 14 | |
| 15 | #include <asm/video.h> |
| 16 | |
| 17 | pgprot_t pgprot_framebuffer(pgprot_t prot, |
| 18 | unsigned long vm_start, unsigned long vm_end, |
| 19 | unsigned long offset) |
| 20 | { |
| 21 | pgprot_val(prot) &= ~_PAGE_CACHE_MASK; |
| 22 | if (boot_cpu_data.x86 > 3) |
| 23 | pgprot_val(prot) |= cachemode2protval(pcm: _PAGE_CACHE_MODE_UC_MINUS); |
| 24 | |
| 25 | return prot; |
| 26 | } |
| 27 | EXPORT_SYMBOL(pgprot_framebuffer); |
| 28 | |
| 29 | bool video_is_primary_device(struct device *dev) |
| 30 | { |
| 31 | #ifdef CONFIG_SCREEN_INFO |
| 32 | struct screen_info *si = &screen_info; |
| 33 | struct resource res[SCREEN_INFO_MAX_RESOURCES]; |
| 34 | ssize_t i, numres; |
| 35 | #endif |
| 36 | struct pci_dev *pdev; |
| 37 | |
| 38 | if (!dev_is_pci(dev)) |
| 39 | return false; |
| 40 | |
| 41 | pdev = to_pci_dev(dev); |
| 42 | |
| 43 | if (!pci_is_display(pdev)) |
| 44 | return false; |
| 45 | |
| 46 | if (pdev == vga_default_device()) |
| 47 | return true; |
| 48 | |
| 49 | #ifdef CONFIG_SCREEN_INFO |
| 50 | numres = screen_info_resources(si, r: res, ARRAY_SIZE(res)); |
| 51 | for (i = 0; i < numres; ++i) { |
| 52 | if (!(res[i].flags & IORESOURCE_MEM)) |
| 53 | continue; |
| 54 | |
| 55 | if (pci_find_resource(dev: pdev, res: &res[i])) |
| 56 | return true; |
| 57 | } |
| 58 | #endif |
| 59 | |
| 60 | return false; |
| 61 | } |
| 62 | EXPORT_SYMBOL(video_is_primary_device); |
| 63 | |
| 64 | MODULE_LICENSE("GPL"); |
| 65 |