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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/* * The VGA aribiter manages VGA space routing and VGA resource decode to * allow multiple VGA devices to be used in a system in a safe way. * * (C) Copyright 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org> * (C) Copyright 2007 Paulo R. Zanoni <przanoni@gmail.com> * (C) Copyright 2007, 2009 Tiago Vignatti <vignatti@freedesktop.org> */
#ifndef LINUX_VGA_H#define LINUX_VGA_H
#include <video/vga.h>
struct pci_dev;
/* Legacy VGA regions */#define VGA_RSRC_NONE 0x00#define VGA_RSRC_LEGACY_IO 0x01#define VGA_RSRC_LEGACY_MEM 0x02#define VGA_RSRC_LEGACY_MASK (VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM)/* Non-legacy access */#define VGA_RSRC_NORMAL_IO 0x04#define VGA_RSRC_NORMAL_MEM 0x08
#ifdef CONFIG_VGA_ARBvoid vga_set_legacy_decoding(struct pci_dev *pdev, unsigned int decodes);int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interruptible);void vga_put(struct pci_dev *pdev, unsigned int rsrc);struct pci_dev *vga_default_device(void);void vga_set_default_device(struct pci_dev *pdev);int vga_remove_vgacon(struct pci_dev *pdev);int vga_client_register(struct pci_dev *pdev, unsigned int (*set_decode)(struct pci_dev *pdev, bool state));#else /* CONFIG_VGA_ARB */static inline void vga_set_legacy_decoding(struct pci_dev *pdev, unsigned int decodes){};static inline int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interruptible){ return 0;}static inline void vga_put(struct pci_dev *pdev, unsigned int rsrc){}static inline struct pci_dev *vga_default_device(void){ return NULL;}static inline void vga_set_default_device(struct pci_dev *pdev){}static inline int vga_remove_vgacon(struct pci_dev *pdev){ return 0;}static inline int vga_client_register(struct pci_dev *pdev, unsigned int (*set_decode)(struct pci_dev *pdev, bool state)){ return 0;}#endif /* CONFIG_VGA_ARB */
/** * vga_get_interruptible * @pdev: pci device of the VGA card or NULL for the system default * @rsrc: bit mask of resources to acquire and lock * * Shortcut to vga_get with interruptible set to true. * * On success, release the VGA resource again with vga_put(). */static inline int vga_get_interruptible(struct pci_dev *pdev, unsigned int rsrc){ return vga_get(pdev, rsrc, 1);}
/** * vga_get_uninterruptible - shortcut to vga_get() * @pdev: pci device of the VGA card or NULL for the system default * @rsrc: bit mask of resources to acquire and lock * * Shortcut to vga_get with interruptible set to false. * * On success, release the VGA resource again with vga_put(). */static inline int vga_get_uninterruptible(struct pci_dev *pdev, unsigned int rsrc){ return vga_get(pdev, rsrc, 0);}
static inline void vga_client_unregister(struct pci_dev *pdev){ vga_client_register(pdev, NULL);}
#endif /* LINUX_VGA_H */