diff options
Diffstat (limited to 'include/linux/vgaarb.h')
| -rw-r--r-- | include/linux/vgaarb.h | 143 |
1 files changed, 46 insertions, 97 deletions
diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h index 977caf96c8d2..97129a1bbb7d 100644 --- a/include/linux/vgaarb.h +++ b/include/linux/vgaarb.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: MIT */ + /* * 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. @@ -5,27 +7,6 @@ * (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 @@ -33,6 +14,8 @@ #include <video/vga.h> +struct pci_dev; + /* Legacy VGA regions */ #define VGA_RSRC_NONE 0x00 #define VGA_RSRC_LEGACY_IO 0x01 @@ -42,42 +25,45 @@ #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 +#ifdef CONFIG_VGA_ARB +void 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) { }; -#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; } -#endif + 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 @@ -91,7 +77,7 @@ static inline int vga_get(struct pci_dev *pdev, unsigned int rsrc, int interrupt static inline int vga_get_interruptible(struct pci_dev *pdev, unsigned int rsrc) { - return vga_get(pdev, rsrc, 1); + return vga_get(pdev, rsrc, 1); } /** @@ -106,49 +92,12 @@ static inline int vga_get_interruptible(struct pci_dev *pdev, static inline int vga_get_uninterruptible(struct pci_dev *pdev, unsigned int rsrc) { - return vga_get(pdev, rsrc, 0); + return vga_get(pdev, rsrc, 0); } -#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); -extern int vga_remove_vgacon(struct pci_dev *pdev); -#else -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; }; -#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) +static inline void vga_client_unregister(struct pci_dev *pdev) { - return 1; -} -#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; + vga_client_register(pdev, NULL); } -#endif #endif /* LINUX_VGA_H */ |