cregit-Linux how code gets into the kernel

Release 4.12 include/linux/vgaarb.h

Directory: include/linux
/*
 * 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>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS
 * IN THE SOFTWARE.
 *
 */

#ifndef LINUX_VGA_H

#define LINUX_VGA_H

#include <video/vga.h>

/* 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

/* Passing that instead of a pci_dev to use the system "default"
 * device, that is the one used by vgacon. Archs will probably
 * have to provide their own vga_default_device();
 */

#define VGA_DEFAULT_DEVICE     (NULL)

struct pci_dev;

/* For use by clients */

/**
 *     vga_set_legacy_decoding
 *
 *     @pdev: pci device of the VGA card
 *     @decodes: bit mask of what legacy regions the card decodes
 *
 *     Indicates to the arbiter if the card decodes legacy VGA IOs,
 *     legacy VGA Memory, both, or none. All cards default to both,
 *     the card driver (fbdev for example) should tell the arbiter
 *     if it has disabled legacy decoding, so the card can be left
 *     out of the arbitration process (and can be safe to take
 *     interrupts at any time.
 */
#if defined(CONFIG_VGA_ARB)
extern void vga_set_legacy_decoding(struct pci_dev *pdev,
				    unsigned int decodes);
#else

static inline void vga_set_legacy_decoding(struct pci_dev *pdev, unsigned int decodes) { }

Contributors

PersonTokensPropCommitsCommitProp
Alex Williamson15100.00%1100.00%
Total15100.00%1100.00%

; #endif #if defined(CONFIG_VGA_ARB) extern int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interruptible); #else
static inline int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interruptible) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chris Wilson22100.00%1100.00%
Total22100.00%1100.00%

#endif /** * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt26100.00%1100.00%
Total26100.00%1100.00%

/** * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt26100.00%1100.00%
Total26100.00%1100.00%

#if defined(CONFIG_VGA_ARB) extern int vga_tryget(struct pci_dev *pdev, unsigned int rsrc); #else
static inline int vga_tryget(struct pci_dev *pdev, unsigned int rsrc) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chris Wilson19100.00%1100.00%
Total19100.00%1100.00%

#endif #if defined(CONFIG_VGA_ARB) extern void vga_put(struct pci_dev *pdev, unsigned int rsrc); #else #define vga_put(pdev, rsrc) #endif #ifdef CONFIG_VGA_ARB extern struct pci_dev *vga_default_device(void); extern void vga_set_default_device(struct pci_dev *pdev); #else
static inline struct pci_dev *vga_default_device(void) { return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Garrett14100.00%1100.00%
Total14100.00%1100.00%

;
static inline void vga_set_default_device(struct pci_dev *pdev) { }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Garrett11100.00%1100.00%
Total11100.00%1100.00%

; #endif /* * Architectures should define this if they have several * independent PCI domains that can afford concurrent VGA * decoding */ #ifndef __ARCH_HAS_VGA_CONFLICT
static inline int vga_conflicts(struct pci_dev *p1, struct pci_dev *p2) { return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt20100.00%1100.00%
Total20100.00%1100.00%

#endif #if defined(CONFIG_VGA_ARB) int vga_client_register(struct pci_dev *pdev, void *cookie, void (*irq_set_state)(void *cookie, bool state), unsigned int (*set_vga_decode)(void *cookie, bool state)); #else static inline int vga_client_register(struct pci_dev *pdev, void *cookie, void (*irq_set_state)(void *cookie, bool state), unsigned int (*set_vga_decode)(void *cookie, bool state)) { return 0; } #endif #endif /* LINUX_VGA_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt22450.68%110.00%
Chris Wilson7917.87%110.00%
Ingo Molnar5612.67%110.00%
Matthew Garrett4710.63%220.00%
Alex Williamson265.88%110.00%
Daniel Vetter30.68%110.00%
Doug Goldstein30.68%110.00%
Randy Dunlap30.68%110.00%
Tiago Vignatti10.23%110.00%
Total442100.00%10100.00%
Directory: include/linux
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.