projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| deb2d2ec | 1 | /* |
| e2d4304b JB |
2 | * The VGA aribiter manages VGA space routing and VGA resource decode to |
| 3 | * allow multiple VGA devices to be used in a system in a safe way. | |
| deb2d2ec BH |
4 | * |
| 5 | * (C) Copyright 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
| 6 | * (C) Copyright 2007 Paulo R. Zanoni <przanoni@gmail.com> | |
| 7 | * (C) Copyright 2007, 2009 Tiago Vignatti <vignatti@freedesktop.org> | |
| c0db9cbc TV |
8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
| 10 | * copy of this software and associated documentation files (the "Software"), | |
| 11 | * to deal in the Software without restriction, including without limitation | |
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| 13 | * and/or sell copies of the Software, and to permit persons to whom the | |
| 14 | * Software is furnished to do so, subject to the following conditions: | |
| 15 | * | |
| 16 | * The above copyright notice and this permission notice (including the next | |
| 17 | * paragraph) shall be included in all copies or substantial portions of the | |
| 18 | * Software. | |
| 19 | * | |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| 23 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| 25 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| 26 | * DEALINGS | |
| 27 | * IN THE SOFTWARE. | |
| 28 | * | |
| deb2d2ec BH |
29 | */ |
| 30 | ||
| 31 | #ifndef LINUX_VGA_H | |
| a6a1a095 | 32 | #define LINUX_VGA_H |
| deb2d2ec | 33 | |
| 1a39b310 | 34 | #include <video/vga.h> |
| deb2d2ec | 35 | |
| 6609176f CH |
36 | struct pci_dev; |
| 37 | ||
| deb2d2ec BH |
38 | /* Legacy VGA regions */ |
| 39 | #define VGA_RSRC_NONE 0x00 | |
| 40 | #define VGA_RSRC_LEGACY_IO 0x01 | |
| 41 | #define VGA_RSRC_LEGACY_MEM 0x02 | |
| 42 | #define VGA_RSRC_LEGACY_MASK (VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM) | |
| 43 | /* Non-legacy access */ | |
| 44 | #define VGA_RSRC_NORMAL_IO 0x04 | |
| 45 | #define VGA_RSRC_NORMAL_MEM 0x08 | |
| 46 | ||
| 6609176f CH |
47 | #ifdef CONFIG_VGA_ARB |
| 48 | void vga_set_legacy_decoding(struct pci_dev *pdev, unsigned int decodes); | |
| 49 | int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interruptible); | |
| 50 | void vga_put(struct pci_dev *pdev, unsigned int rsrc); | |
| 51 | struct pci_dev *vga_default_device(void); | |
| 52 | void vga_set_default_device(struct pci_dev *pdev); | |
| 53 | int vga_remove_vgacon(struct pci_dev *pdev); | |
| bf44e8ce CH |
54 | int vga_client_register(struct pci_dev *pdev, |
| 55 | unsigned int (*set_decode)(struct pci_dev *pdev, bool state)); | |
| 6609176f | 56 | #else /* CONFIG_VGA_ARB */ |
| 0ea18b40 | 57 | static inline void vga_set_legacy_decoding(struct pci_dev *pdev, |
| 6609176f CH |
58 | unsigned int decodes) |
| 59 | { | |
| 60 | }; | |
| 61 | static inline int vga_get(struct pci_dev *pdev, unsigned int rsrc, | |
| 62 | int interruptible) | |
| 63 | { | |
| 64 | return 0; | |
| 65 | } | |
| 66 | static inline void vga_put(struct pci_dev *pdev, unsigned int rsrc) | |
| 67 | { | |
| 68 | } | |
| 69 | static inline struct pci_dev *vga_default_device(void) | |
| 70 | { | |
| 71 | return NULL; | |
| 72 | } | |
| 73 | static inline void vga_set_default_device(struct pci_dev *pdev) | |
| 74 | { | |
| 75 | } | |
| 76 | static inline int vga_remove_vgacon(struct pci_dev *pdev) | |
| 77 | { | |
| 78 | return 0; | |
| 79 | } | |
| bf44e8ce CH |
80 | static inline int vga_client_register(struct pci_dev *pdev, |
| 81 | unsigned int (*set_decode)(struct pci_dev *pdev, bool state)) | |
| 6609176f CH |
82 | { |
| 83 | return 0; | |
| 84 | } | |
| 85 | #endif /* CONFIG_VGA_ARB */ | |
| deb2d2ec BH |
86 | |
| 87 | /** | |
| b754b35b DV |
88 | * vga_get_interruptible |
| 89 | * @pdev: pci device of the VGA card or NULL for the system default | |
| 90 | * @rsrc: bit mask of resources to acquire and lock | |
| deb2d2ec | 91 | * |
| b754b35b DV |
92 | * Shortcut to vga_get with interruptible set to true. |
| 93 | * | |
| 94 | * On success, release the VGA resource again with vga_put(). | |
| deb2d2ec | 95 | */ |
| deb2d2ec | 96 | static inline int vga_get_interruptible(struct pci_dev *pdev, |
| 6ac3bd52 | 97 | unsigned int rsrc) |
| deb2d2ec BH |
98 | { |
| 99 | return vga_get(pdev, rsrc, 1); | |
| 100 | } | |
| 101 | ||
| 102 | /** | |
| b754b35b DV |
103 | * vga_get_uninterruptible - shortcut to vga_get() |
| 104 | * @pdev: pci device of the VGA card or NULL for the system default | |
| 105 | * @rsrc: bit mask of resources to acquire and lock | |
| deb2d2ec | 106 | * |
| b754b35b DV |
107 | * Shortcut to vga_get with interruptible set to false. |
| 108 | * | |
| 109 | * On success, release the VGA resource again with vga_put(). | |
| deb2d2ec | 110 | */ |
| deb2d2ec | 111 | static inline int vga_get_uninterruptible(struct pci_dev *pdev, |
| 6ac3bd52 | 112 | unsigned int rsrc) |
| deb2d2ec BH |
113 | { |
| 114 | return vga_get(pdev, rsrc, 0); | |
| 115 | } | |
| 116 | ||
| b8779475 CH |
117 | static inline void vga_client_unregister(struct pci_dev *pdev) |
| 118 | { | |
| bf44e8ce | 119 | vga_client_register(pdev, NULL); |
| b8779475 CH |
120 | } |
| 121 | ||
| deb2d2ec | 122 | #endif /* LINUX_VGA_H */ |