mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
d88ca7e1a2
syzbot is reporting OOB read bug in vc_do_resize() [1] caused by memcpy()
based on outdated old_{rows,row_size} values, for resize_screen() can
recurse into vc_do_resize() which changes vc->vc_{cols,rows} that outdates
old_{rows,row_size} values which were saved before calling resize_screen().
Daniel Vetter explained that resize_screen() should not recurse into
fbcon_update_vcs() path due to FBINFO_MISC_USEREVENT being still set
when calling resize_screen().
Instead of masking FBINFO_MISC_USEREVENT before calling fbcon_update_vcs(),
we can remove FBINFO_MISC_USEREVENT by calling fbcon_update_vcs() only if
fb_set_var() returned 0. This change assumes that it is harmless to call
fbcon_update_vcs() when fb_set_var() returned 0 without reaching
fb_notifier_call_chain().
[1] https://syzkaller.appspot.com/bug?id=c70c88cfd16dcf6e1d3c7f0ab8648b3144b5b25e
Reported-and-tested-by: syzbot <syzbot+c37a14770d51a085a520@syzkaller.appspotmail.com>
Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: kernel test robot <lkp@intel.com> for missing #include
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/075b7e37-3278-cd7d-31ab-c5073cfa8e92@i-love.sakura.ne.jp
818 lines
28 KiB
C
818 lines
28 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FB_H
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#define _LINUX_FB_H
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#include <linux/kgdb.h>
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#include <uapi/linux/fb.h>
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#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/workqueue.h>
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#include <linux/notifier.h>
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#include <linux/list.h>
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#include <linux/backlight.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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struct vm_area_struct;
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struct fb_info;
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struct device;
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struct file;
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struct videomode;
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struct device_node;
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/* Definitions below are used in the parsed monitor specs */
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#define FB_DPMS_ACTIVE_OFF 1
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#define FB_DPMS_SUSPEND 2
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#define FB_DPMS_STANDBY 4
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#define FB_DISP_DDI 1
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#define FB_DISP_ANA_700_300 2
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#define FB_DISP_ANA_714_286 4
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#define FB_DISP_ANA_1000_400 8
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#define FB_DISP_ANA_700_000 16
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#define FB_DISP_MONO 32
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#define FB_DISP_RGB 64
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#define FB_DISP_MULTI 128
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#define FB_DISP_UNKNOWN 256
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#define FB_SIGNAL_NONE 0
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#define FB_SIGNAL_BLANK_BLANK 1
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#define FB_SIGNAL_SEPARATE 2
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#define FB_SIGNAL_COMPOSITE 4
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#define FB_SIGNAL_SYNC_ON_GREEN 8
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#define FB_SIGNAL_SERRATION_ON 16
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#define FB_MISC_PRIM_COLOR 1
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#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
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#define FB_MISC_HDMI 4
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struct fb_chroma {
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__u32 redx; /* in fraction of 1024 */
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__u32 greenx;
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__u32 bluex;
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__u32 whitex;
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__u32 redy;
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__u32 greeny;
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__u32 bluey;
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__u32 whitey;
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};
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struct fb_monspecs {
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struct fb_chroma chroma;
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struct fb_videomode *modedb; /* mode database */
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__u8 manufacturer[4]; /* Manufacturer */
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__u8 monitor[14]; /* Monitor String */
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__u8 serial_no[14]; /* Serial Number */
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__u8 ascii[14]; /* ? */
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__u32 modedb_len; /* mode database length */
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__u32 model; /* Monitor Model */
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__u32 serial; /* Serial Number - Integer */
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__u32 year; /* Year manufactured */
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__u32 week; /* Week Manufactured */
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__u32 hfmin; /* hfreq lower limit (Hz) */
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__u32 hfmax; /* hfreq upper limit (Hz) */
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__u32 dclkmin; /* pixelclock lower limit (Hz) */
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__u32 dclkmax; /* pixelclock upper limit (Hz) */
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__u16 input; /* display type - see FB_DISP_* */
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__u16 dpms; /* DPMS support - see FB_DPMS_ */
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__u16 signal; /* Signal Type - see FB_SIGNAL_* */
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__u16 vfmin; /* vfreq lower limit (Hz) */
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__u16 vfmax; /* vfreq upper limit (Hz) */
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__u16 gamma; /* Gamma - in fractions of 100 */
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__u16 gtf : 1; /* supports GTF */
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__u16 misc; /* Misc flags - see FB_MISC_* */
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__u8 version; /* EDID version... */
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__u8 revision; /* ...and revision */
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__u8 max_x; /* Maximum horizontal size (cm) */
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__u8 max_y; /* Maximum vertical size (cm) */
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};
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struct fb_cmap_user {
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__u32 start; /* First entry */
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__u32 len; /* Number of entries */
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__u16 __user *red; /* Red values */
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__u16 __user *green;
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__u16 __user *blue;
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__u16 __user *transp; /* transparency, can be NULL */
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};
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struct fb_image_user {
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__u32 dx; /* Where to place image */
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__u32 dy;
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__u32 width; /* Size of image */
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__u32 height;
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__u32 fg_color; /* Only used when a mono bitmap */
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__u32 bg_color;
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__u8 depth; /* Depth of the image */
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const char __user *data; /* Pointer to image data */
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struct fb_cmap_user cmap; /* color map info */
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};
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struct fb_cursor_user {
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__u16 set; /* what to set */
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__u16 enable; /* cursor on/off */
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__u16 rop; /* bitop operation */
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const char __user *mask; /* cursor mask bits */
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struct fbcurpos hot; /* cursor hot spot */
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struct fb_image_user image; /* Cursor image */
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};
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/*
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* Register/unregister for framebuffer events
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*/
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/* The resolution of the passed in fb_info about to change */
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#define FB_EVENT_MODE_CHANGE 0x01
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#ifdef CONFIG_GUMSTIX_AM200EPD
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/* only used by mach-pxa/am200epd.c */
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#define FB_EVENT_FB_REGISTERED 0x05
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#define FB_EVENT_FB_UNREGISTERED 0x06
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#endif
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/* A display blank is requested */
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#define FB_EVENT_BLANK 0x09
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struct fb_event {
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struct fb_info *info;
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void *data;
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};
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struct fb_blit_caps {
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u32 x;
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u32 y;
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u32 len;
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u32 flags;
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};
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#ifdef CONFIG_FB_NOTIFY
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extern int fb_register_client(struct notifier_block *nb);
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extern int fb_unregister_client(struct notifier_block *nb);
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extern int fb_notifier_call_chain(unsigned long val, void *v);
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#else
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static inline int fb_register_client(struct notifier_block *nb)
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{
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return 0;
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};
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static inline int fb_unregister_client(struct notifier_block *nb)
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{
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return 0;
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};
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static inline int fb_notifier_call_chain(unsigned long val, void *v)
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{
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return 0;
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};
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#endif
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/*
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* Pixmap structure definition
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*
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* The purpose of this structure is to translate data
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* from the hardware independent format of fbdev to what
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* format the hardware needs.
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*/
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#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
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#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
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#define FB_PIXMAP_IO 4 /* memory is iomapped */
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#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
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struct fb_pixmap {
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u8 *addr; /* pointer to memory */
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u32 size; /* size of buffer in bytes */
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u32 offset; /* current offset to buffer */
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u32 buf_align; /* byte alignment of each bitmap */
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u32 scan_align; /* alignment per scanline */
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u32 access_align; /* alignment per read/write (bits) */
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u32 flags; /* see FB_PIXMAP_* */
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u32 blit_x; /* supported bit block dimensions (1-32)*/
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u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
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/* blit_y = 1 << (height - 1) */
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/* if 0, will be set to 0xffffffff (all)*/
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/* access methods */
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void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
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void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
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};
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#ifdef CONFIG_FB_DEFERRED_IO
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struct fb_deferred_io {
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/* delay between mkwrite and deferred handler */
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unsigned long delay;
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struct mutex lock; /* mutex that protects the page list */
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struct list_head pagelist; /* list of touched pages */
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/* callback */
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void (*first_io)(struct fb_info *info);
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void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
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};
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#endif
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/*
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* Frame buffer operations
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*
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* LOCKING NOTE: those functions must _ALL_ be called with the console
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* semaphore held, this is the only suitable locking mechanism we have
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* in 2.6. Some may be called at interrupt time at this point though.
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*
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* The exception to this is the debug related hooks. Putting the fb
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* into a debug state (e.g. flipping to the kernel console) and restoring
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* it must be done in a lock-free manner, so low level drivers should
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* keep track of the initial console (if applicable) and may need to
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* perform direct, unlocked hardware writes in these hooks.
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*/
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struct fb_ops {
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/* open/release and usage marking */
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struct module *owner;
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int (*fb_open)(struct fb_info *info, int user);
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int (*fb_release)(struct fb_info *info, int user);
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/* For framebuffers with strange non linear layouts or that do not
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* work with normal memory mapped access
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*/
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ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
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size_t count, loff_t *ppos);
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ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
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size_t count, loff_t *ppos);
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/* checks var and eventually tweaks it to something supported,
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* DO NOT MODIFY PAR */
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int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
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/* set the video mode according to info->var */
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int (*fb_set_par)(struct fb_info *info);
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/* set color register */
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int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp, struct fb_info *info);
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/* set color registers in batch */
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int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
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/* blank display */
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int (*fb_blank)(int blank, struct fb_info *info);
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/* pan display */
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int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
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/* Draws a rectangle */
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void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
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/* Copy data from area to another */
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void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
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/* Draws a image to the display */
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void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
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/* Draws cursor */
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int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
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/* wait for blit idle, optional */
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int (*fb_sync)(struct fb_info *info);
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/* perform fb specific ioctl (optional) */
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int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
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unsigned long arg);
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/* Handle 32bit compat ioctl (optional) */
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int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
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unsigned long arg);
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/* perform fb specific mmap */
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int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
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/* get capability given var */
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void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
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struct fb_var_screeninfo *var);
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/* teardown any resources to do with this framebuffer */
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void (*fb_destroy)(struct fb_info *info);
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/* called at KDB enter and leave time to prepare the console */
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int (*fb_debug_enter)(struct fb_info *info);
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int (*fb_debug_leave)(struct fb_info *info);
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};
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#ifdef CONFIG_FB_TILEBLITTING
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#define FB_TILE_CURSOR_NONE 0
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#define FB_TILE_CURSOR_UNDERLINE 1
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#define FB_TILE_CURSOR_LOWER_THIRD 2
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#define FB_TILE_CURSOR_LOWER_HALF 3
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#define FB_TILE_CURSOR_TWO_THIRDS 4
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#define FB_TILE_CURSOR_BLOCK 5
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struct fb_tilemap {
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__u32 width; /* width of each tile in pixels */
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__u32 height; /* height of each tile in scanlines */
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__u32 depth; /* color depth of each tile */
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__u32 length; /* number of tiles in the map */
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const __u8 *data; /* actual tile map: a bitmap array, packed
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to the nearest byte */
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};
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struct fb_tilerect {
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__u32 sx; /* origin in the x-axis */
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__u32 sy; /* origin in the y-axis */
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__u32 width; /* number of tiles in the x-axis */
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__u32 height; /* number of tiles in the y-axis */
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__u32 index; /* what tile to use: index to tile map */
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__u32 fg; /* foreground color */
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__u32 bg; /* background color */
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__u32 rop; /* raster operation */
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};
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struct fb_tilearea {
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__u32 sx; /* source origin in the x-axis */
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__u32 sy; /* source origin in the y-axis */
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__u32 dx; /* destination origin in the x-axis */
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__u32 dy; /* destination origin in the y-axis */
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__u32 width; /* number of tiles in the x-axis */
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__u32 height; /* number of tiles in the y-axis */
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};
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struct fb_tileblit {
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__u32 sx; /* origin in the x-axis */
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__u32 sy; /* origin in the y-axis */
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__u32 width; /* number of tiles in the x-axis */
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__u32 height; /* number of tiles in the y-axis */
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__u32 fg; /* foreground color */
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__u32 bg; /* background color */
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__u32 length; /* number of tiles to draw */
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__u32 *indices; /* array of indices to tile map */
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};
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struct fb_tilecursor {
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__u32 sx; /* cursor position in the x-axis */
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__u32 sy; /* cursor position in the y-axis */
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__u32 mode; /* 0 = erase, 1 = draw */
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__u32 shape; /* see FB_TILE_CURSOR_* */
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__u32 fg; /* foreground color */
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__u32 bg; /* background color */
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};
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struct fb_tile_ops {
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/* set tile characteristics */
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void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
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/* all dimensions from hereon are in terms of tiles */
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/* move a rectangular region of tiles from one area to another*/
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void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
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/* fill a rectangular region with a tile */
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void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
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/* copy an array of tiles */
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void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
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/* cursor */
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void (*fb_tilecursor)(struct fb_info *info,
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struct fb_tilecursor *cursor);
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/* get maximum length of the tile map */
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int (*fb_get_tilemax)(struct fb_info *info);
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};
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#endif /* CONFIG_FB_TILEBLITTING */
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/* FBINFO_* = fb_info.flags bit flags */
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#define FBINFO_DEFAULT 0
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#define FBINFO_HWACCEL_DISABLED 0x0002
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/* When FBINFO_HWACCEL_DISABLED is set:
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* Hardware acceleration is turned off. Software implementations
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* of required functions (copyarea(), fillrect(), and imageblit())
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* takes over; acceleration engine should be in a quiescent state */
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/* hints */
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#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
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#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
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#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
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/* hardware supported ops */
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/* semantics: when a bit is set, it indicates that the operation is
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* accelerated by hardware.
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* required functions will still work even if the bit is not set.
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* optional functions may not even exist if the flag bit is not set.
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*/
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#define FBINFO_HWACCEL_NONE 0x0000
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#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
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#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
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#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
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#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
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#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
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#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
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#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
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#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
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/* A driver may set this flag to indicate that it does want a set_par to be
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* called every time when fbcon_switch is executed. The advantage is that with
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* this flag set you can really be sure that set_par is always called before
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* any of the functions dependent on the correct hardware state or altering
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* that state, even if you are using some broken X releases. The disadvantage
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* is that it introduces unwanted delays to every console switch if set_par
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* is slow. It is a good idea to try this flag in the drivers initialization
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* code whenever there is a bug report related to switching between X and the
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* framebuffer console.
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*/
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#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
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/* where the fb is a firmware driver, and can be replaced with a proper one */
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#define FBINFO_MISC_FIRMWARE 0x80000
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/*
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* Host and GPU endianness differ.
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*/
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#define FBINFO_FOREIGN_ENDIAN 0x100000
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/*
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* Big endian math. This is the same flags as above, but with different
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* meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
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* and host endianness. Drivers should not use this flag.
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*/
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#define FBINFO_BE_MATH 0x100000
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/*
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* Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
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* drivers to stop userspace from trying to share buffers behind the kernel's
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* back. Instead dma-buf based buffer sharing should be used.
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*/
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#define FBINFO_HIDE_SMEM_START 0x200000
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struct fb_info {
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atomic_t count;
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int node;
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int flags;
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/*
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* -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
|
|
* a lcd is not mounted upright and fbcon should rotate to compensate.
|
|
*/
|
|
int fbcon_rotate_hint;
|
|
struct mutex lock; /* Lock for open/release/ioctl funcs */
|
|
struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
|
|
struct fb_var_screeninfo var; /* Current var */
|
|
struct fb_fix_screeninfo fix; /* Current fix */
|
|
struct fb_monspecs monspecs; /* Current Monitor specs */
|
|
struct work_struct queue; /* Framebuffer event queue */
|
|
struct fb_pixmap pixmap; /* Image hardware mapper */
|
|
struct fb_pixmap sprite; /* Cursor hardware mapper */
|
|
struct fb_cmap cmap; /* Current cmap */
|
|
struct list_head modelist; /* mode list */
|
|
struct fb_videomode *mode; /* current mode */
|
|
|
|
#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
|
|
/* assigned backlight device */
|
|
/* set before framebuffer registration,
|
|
remove after unregister */
|
|
struct backlight_device *bl_dev;
|
|
|
|
/* Backlight level curve */
|
|
struct mutex bl_curve_mutex;
|
|
u8 bl_curve[FB_BACKLIGHT_LEVELS];
|
|
#endif
|
|
#ifdef CONFIG_FB_DEFERRED_IO
|
|
struct delayed_work deferred_work;
|
|
struct fb_deferred_io *fbdefio;
|
|
#endif
|
|
|
|
const struct fb_ops *fbops;
|
|
struct device *device; /* This is the parent */
|
|
struct device *dev; /* This is this fb device */
|
|
int class_flag; /* private sysfs flags */
|
|
#ifdef CONFIG_FB_TILEBLITTING
|
|
struct fb_tile_ops *tileops; /* Tile Blitting */
|
|
#endif
|
|
union {
|
|
char __iomem *screen_base; /* Virtual address */
|
|
char *screen_buffer;
|
|
};
|
|
unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
|
|
void *pseudo_palette; /* Fake palette of 16 colors */
|
|
#define FBINFO_STATE_RUNNING 0
|
|
#define FBINFO_STATE_SUSPENDED 1
|
|
u32 state; /* Hardware state i.e suspend */
|
|
void *fbcon_par; /* fbcon use-only private area */
|
|
/* From here on everything is device dependent */
|
|
void *par;
|
|
/* we need the PCI or similar aperture base/size not
|
|
smem_start/size as smem_start may just be an object
|
|
allocated inside the aperture so may not actually overlap */
|
|
struct apertures_struct {
|
|
unsigned int count;
|
|
struct aperture {
|
|
resource_size_t base;
|
|
resource_size_t size;
|
|
} ranges[0];
|
|
} *apertures;
|
|
|
|
bool skip_vt_switch; /* no VT switch on suspend/resume required */
|
|
};
|
|
|
|
static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
|
|
struct apertures_struct *a;
|
|
|
|
a = kzalloc(struct_size(a, ranges, max_num), GFP_KERNEL);
|
|
if (!a)
|
|
return NULL;
|
|
a->count = max_num;
|
|
return a;
|
|
}
|
|
|
|
#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
|
|
|
|
/* This will go away
|
|
* fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
|
|
* when it wants to turn the acceleration engine on. This is
|
|
* really a separate operation, and should be modified via sysfs.
|
|
* But for now, we leave it broken with the following define
|
|
*/
|
|
#define STUPID_ACCELF_TEXT_SHIT
|
|
|
|
// This will go away
|
|
#if defined(__sparc__)
|
|
|
|
/* We map all of our framebuffers such that big-endian accesses
|
|
* are what we want, so the following is sufficient.
|
|
*/
|
|
|
|
// This will go away
|
|
#define fb_readb sbus_readb
|
|
#define fb_readw sbus_readw
|
|
#define fb_readl sbus_readl
|
|
#define fb_readq sbus_readq
|
|
#define fb_writeb sbus_writeb
|
|
#define fb_writew sbus_writew
|
|
#define fb_writel sbus_writel
|
|
#define fb_writeq sbus_writeq
|
|
#define fb_memset sbus_memset_io
|
|
#define fb_memcpy_fromfb sbus_memcpy_fromio
|
|
#define fb_memcpy_tofb sbus_memcpy_toio
|
|
|
|
#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
|
|
defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
|
|
defined(__arm__) || defined(__aarch64__)
|
|
|
|
#define fb_readb __raw_readb
|
|
#define fb_readw __raw_readw
|
|
#define fb_readl __raw_readl
|
|
#define fb_readq __raw_readq
|
|
#define fb_writeb __raw_writeb
|
|
#define fb_writew __raw_writew
|
|
#define fb_writel __raw_writel
|
|
#define fb_writeq __raw_writeq
|
|
#define fb_memset memset_io
|
|
#define fb_memcpy_fromfb memcpy_fromio
|
|
#define fb_memcpy_tofb memcpy_toio
|
|
|
|
#else
|
|
|
|
#define fb_readb(addr) (*(volatile u8 *) (addr))
|
|
#define fb_readw(addr) (*(volatile u16 *) (addr))
|
|
#define fb_readl(addr) (*(volatile u32 *) (addr))
|
|
#define fb_readq(addr) (*(volatile u64 *) (addr))
|
|
#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
|
|
#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
|
|
#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
|
|
#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
|
|
#define fb_memset memset
|
|
#define fb_memcpy_fromfb memcpy
|
|
#define fb_memcpy_tofb memcpy
|
|
|
|
#endif
|
|
|
|
#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
|
|
#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
|
|
(val) << (bits))
|
|
#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
|
|
(val) >> (bits))
|
|
|
|
/*
|
|
* `Generic' versions of the frame buffer device operations
|
|
*/
|
|
|
|
extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
|
|
extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
|
|
extern int fb_blank(struct fb_info *info, int blank);
|
|
extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
|
|
extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
|
|
extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
|
|
/*
|
|
* Drawing operations where framebuffer is in system RAM
|
|
*/
|
|
extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
|
|
extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
|
|
extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
|
|
extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
|
|
size_t count, loff_t *ppos);
|
|
extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
|
|
size_t count, loff_t *ppos);
|
|
|
|
/* drivers/video/fbmem.c */
|
|
extern int register_framebuffer(struct fb_info *fb_info);
|
|
extern void unregister_framebuffer(struct fb_info *fb_info);
|
|
extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
|
|
const char *name);
|
|
extern int remove_conflicting_framebuffers(struct apertures_struct *a,
|
|
const char *name, bool primary);
|
|
extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
|
|
extern int fb_show_logo(struct fb_info *fb_info, int rotate);
|
|
extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
|
|
extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
|
|
u32 height, u32 shift_high, u32 shift_low, u32 mod);
|
|
extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
|
|
extern void fb_set_suspend(struct fb_info *info, int state);
|
|
extern int fb_get_color_depth(struct fb_var_screeninfo *var,
|
|
struct fb_fix_screeninfo *fix);
|
|
extern int fb_get_options(const char *name, char **option);
|
|
extern int fb_new_modelist(struct fb_info *info);
|
|
|
|
extern struct fb_info *registered_fb[FB_MAX];
|
|
extern int num_registered_fb;
|
|
extern bool fb_center_logo;
|
|
extern int fb_logo_count;
|
|
extern struct class *fb_class;
|
|
|
|
#define for_each_registered_fb(i) \
|
|
for (i = 0; i < FB_MAX; i++) \
|
|
if (!registered_fb[i]) {} else
|
|
|
|
static inline void lock_fb_info(struct fb_info *info)
|
|
{
|
|
mutex_lock(&info->lock);
|
|
}
|
|
|
|
static inline void unlock_fb_info(struct fb_info *info)
|
|
{
|
|
mutex_unlock(&info->lock);
|
|
}
|
|
|
|
static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
|
|
u8 *src, u32 s_pitch, u32 height)
|
|
{
|
|
u32 i, j;
|
|
|
|
d_pitch -= s_pitch;
|
|
|
|
for (i = height; i--; ) {
|
|
/* s_pitch is a few bytes at the most, memcpy is suboptimal */
|
|
for (j = 0; j < s_pitch; j++)
|
|
*dst++ = *src++;
|
|
dst += d_pitch;
|
|
}
|
|
}
|
|
|
|
/* drivers/video/fb_defio.c */
|
|
int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
|
|
extern void fb_deferred_io_init(struct fb_info *info);
|
|
extern void fb_deferred_io_open(struct fb_info *info,
|
|
struct inode *inode,
|
|
struct file *file);
|
|
extern void fb_deferred_io_cleanup(struct fb_info *info);
|
|
extern int fb_deferred_io_fsync(struct file *file, loff_t start,
|
|
loff_t end, int datasync);
|
|
|
|
static inline bool fb_be_math(struct fb_info *info)
|
|
{
|
|
#ifdef CONFIG_FB_FOREIGN_ENDIAN
|
|
#if defined(CONFIG_FB_BOTH_ENDIAN)
|
|
return info->flags & FBINFO_BE_MATH;
|
|
#elif defined(CONFIG_FB_BIG_ENDIAN)
|
|
return true;
|
|
#elif defined(CONFIG_FB_LITTLE_ENDIAN)
|
|
return false;
|
|
#endif /* CONFIG_FB_BOTH_ENDIAN */
|
|
#else
|
|
#ifdef __BIG_ENDIAN
|
|
return true;
|
|
#else
|
|
return false;
|
|
#endif /* __BIG_ENDIAN */
|
|
#endif /* CONFIG_FB_FOREIGN_ENDIAN */
|
|
}
|
|
|
|
/* drivers/video/fbsysfs.c */
|
|
extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
|
|
extern void framebuffer_release(struct fb_info *info);
|
|
extern int fb_init_device(struct fb_info *fb_info);
|
|
extern void fb_cleanup_device(struct fb_info *head);
|
|
extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
|
|
|
|
/* drivers/video/fbmon.c */
|
|
#define FB_MAXTIMINGS 0
|
|
#define FB_VSYNCTIMINGS 1
|
|
#define FB_HSYNCTIMINGS 2
|
|
#define FB_DCLKTIMINGS 3
|
|
#define FB_IGNOREMON 0x100
|
|
|
|
#define FB_MODE_IS_UNKNOWN 0
|
|
#define FB_MODE_IS_DETAILED 1
|
|
#define FB_MODE_IS_STANDARD 2
|
|
#define FB_MODE_IS_VESA 4
|
|
#define FB_MODE_IS_CALCULATED 8
|
|
#define FB_MODE_IS_FIRST 16
|
|
#define FB_MODE_IS_FROM_VAR 32
|
|
|
|
extern int fbmon_dpms(const struct fb_info *fb_info);
|
|
extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
|
|
struct fb_info *info);
|
|
extern int fb_validate_mode(const struct fb_var_screeninfo *var,
|
|
struct fb_info *info);
|
|
extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
|
|
extern const unsigned char *fb_firmware_edid(struct device *device);
|
|
extern void fb_edid_to_monspecs(unsigned char *edid,
|
|
struct fb_monspecs *specs);
|
|
extern void fb_destroy_modedb(struct fb_videomode *modedb);
|
|
extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
|
|
extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
|
|
|
|
extern int of_get_fb_videomode(struct device_node *np,
|
|
struct fb_videomode *fb,
|
|
int index);
|
|
extern int fb_videomode_from_videomode(const struct videomode *vm,
|
|
struct fb_videomode *fbmode);
|
|
|
|
/* drivers/video/modedb.c */
|
|
#define VESA_MODEDB_SIZE 43
|
|
#define DMT_SIZE 0x50
|
|
|
|
extern void fb_var_to_videomode(struct fb_videomode *mode,
|
|
const struct fb_var_screeninfo *var);
|
|
extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
|
|
const struct fb_videomode *mode);
|
|
extern int fb_mode_is_equal(const struct fb_videomode *mode1,
|
|
const struct fb_videomode *mode2);
|
|
extern int fb_add_videomode(const struct fb_videomode *mode,
|
|
struct list_head *head);
|
|
extern void fb_delete_videomode(const struct fb_videomode *mode,
|
|
struct list_head *head);
|
|
extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
|
|
struct list_head *head);
|
|
extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
|
|
struct list_head *head);
|
|
extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
|
|
struct list_head *head);
|
|
extern void fb_destroy_modelist(struct list_head *head);
|
|
extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
|
|
struct list_head *head);
|
|
extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
|
|
struct list_head *head);
|
|
|
|
/* drivers/video/fbcmap.c */
|
|
extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
|
|
extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
|
|
extern void fb_dealloc_cmap(struct fb_cmap *cmap);
|
|
extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
|
|
extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
|
|
extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
|
|
extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
|
|
extern const struct fb_cmap *fb_default_cmap(int len);
|
|
extern void fb_invert_cmaps(void);
|
|
|
|
struct fb_videomode {
|
|
const char *name; /* optional */
|
|
u32 refresh; /* optional */
|
|
u32 xres;
|
|
u32 yres;
|
|
u32 pixclock;
|
|
u32 left_margin;
|
|
u32 right_margin;
|
|
u32 upper_margin;
|
|
u32 lower_margin;
|
|
u32 hsync_len;
|
|
u32 vsync_len;
|
|
u32 sync;
|
|
u32 vmode;
|
|
u32 flag;
|
|
};
|
|
|
|
struct dmt_videomode {
|
|
u32 dmt_id;
|
|
u32 std_2byte_code;
|
|
u32 cvt_3byte_code;
|
|
const struct fb_videomode *mode;
|
|
};
|
|
|
|
extern const char *fb_mode_option;
|
|
extern const struct fb_videomode vesa_modes[];
|
|
extern const struct dmt_videomode dmt_modes[];
|
|
|
|
struct fb_modelist {
|
|
struct list_head list;
|
|
struct fb_videomode mode;
|
|
};
|
|
|
|
extern int fb_find_mode(struct fb_var_screeninfo *var,
|
|
struct fb_info *info, const char *mode_option,
|
|
const struct fb_videomode *db,
|
|
unsigned int dbsize,
|
|
const struct fb_videomode *default_mode,
|
|
unsigned int default_bpp);
|
|
|
|
/* Convenience logging macros */
|
|
#define fb_err(fb_info, fmt, ...) \
|
|
pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
|
|
#define fb_notice(info, fmt, ...) \
|
|
pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
|
|
#define fb_warn(fb_info, fmt, ...) \
|
|
pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
|
|
#define fb_info(fb_info, fmt, ...) \
|
|
pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
|
|
#define fb_dbg(fb_info, fmt, ...) \
|
|
pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
|
|
|
|
#endif /* _LINUX_FB_H */
|