cregit-Linux how code gets into the kernel

Release 4.12 include/linux/fb.h

Directory: include/linux
#ifndef _LINUX_FB_H

#define _LINUX_FB_H

#include <linux/kgdb.h>
#include <uapi/linux/fb.h>

#define FBIO_CURSOR            _IOWR('F', 0x08, struct fb_cursor_user)

#include <linux/fs.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/notifier.h>
#include <linux/list.h>
#include <linux/backlight.h>
#include <linux/slab.h>
#include <asm/io.h>

struct vm_area_struct;
struct fb_info;
struct device;
struct file;
struct videomode;
struct device_node;

/* Definitions below are used in the parsed monitor specs */


#define FB_DPMS_SUSPEND		2

#define FB_DPMS_STANDBY		4

#define FB_DISP_DDI		1

#define FB_DISP_ANA_700_300	2

#define FB_DISP_ANA_714_286	4

#define FB_DISP_ANA_1000_400	8

#define FB_DISP_ANA_700_000	16

#define FB_DISP_MONO		32

#define FB_DISP_RGB		64

#define FB_DISP_MULTI		128

#define FB_DISP_UNKNOWN		256

#define FB_SIGNAL_NONE		0







#define FB_MISC_1ST_DETAIL	2	
/* First Detailed Timing is preferred */

#define FB_MISC_HDMI		4

struct fb_chroma {
__u32 redx;	/* in fraction of 1024 */
__u32 greenx;
__u32 bluex;
__u32 whitex;
__u32 redy;
__u32 greeny;
__u32 bluey;
__u32 whitey;

struct fb_monspecs {
struct fb_chroma chroma;
struct fb_videomode *modedb;	/* mode database */
__u8  manufacturer[4];		/* Manufacturer */
__u8  monitor[14];		/* Monitor String */
__u8  serial_no[14];		/* Serial Number */
__u8  ascii[14];		/* ? */
__u32 modedb_len;		/* mode database length */
__u32 model;			/* Monitor Model */
__u32 serial;			/* Serial Number - Integer */
__u32 year;			/* Year manufactured */
__u32 week;			/* Week Manufactured */
__u32 hfmin;			/* hfreq lower limit (Hz) */
__u32 hfmax;			/* hfreq upper limit (Hz) */
__u32 dclkmin;			/* pixelclock lower limit (Hz) */
__u32 dclkmax;			/* pixelclock upper limit (Hz) */
__u16 input;			/* display type - see FB_DISP_* */
__u16 dpms;			/* DPMS support - see FB_DPMS_ */
__u16 signal;			/* Signal Type - see FB_SIGNAL_* */
__u16 vfmin;			/* vfreq lower limit (Hz) */
__u16 vfmax;			/* vfreq upper limit (Hz) */
__u16 gamma;			/* Gamma - in fractions of 100 */
__u16 gtf	: 1;		/* supports GTF */
__u16 misc;			/* Misc flags - see FB_MISC_* */
__u8  version;			/* EDID version... */
__u8  revision;			/* ...and revision */
__u8  max_x;			/* Maximum horizontal size (cm) */
__u8  max_y;			/* Maximum vertical size (cm) */

struct fb_cmap_user {
__u32 start;			/* First entry  */
__u32 len;			/* Number of entries */
__u16 __user *red;		/* Red values   */
__u16 __user *green;
__u16 __user *blue;
__u16 __user *transp;		/* transparency, can be NULL */

struct fb_image_user {
__u32 dx;			/* Where to place image */
__u32 dy;
__u32 width;			/* Size of image */
__u32 height;
__u32 fg_color;			/* Only used when a mono bitmap */
__u32 bg_color;
__u8  depth;			/* Depth of the image */
const char __user *data;	/* Pointer to image data */
struct fb_cmap_user cmap;	/* color map info */

struct fb_cursor_user {
__u16 set;			/* what to set */
__u16 enable;			/* cursor on/off */
__u16 rop;			/* bitop operation */
const char __user *mask;	/* cursor mask bits */
struct fbcurpos hot;		/* cursor hot spot */
struct fb_image_user image;	/* Cursor image */

 * Register/unregister for framebuffer events

/*      The resolution of the passed in fb_info about to change */ 

#define FB_EVENT_MODE_CHANGE		0x01
/*      The display on this fb_info is beeing suspended, no access to the
 *      framebuffer is allowed any more after that call returns

#define FB_EVENT_SUSPEND		0x02
/*      The display on this fb_info was resumed, you can restore the display
 *      if you own it

#define FB_EVENT_RESUME			0x03
/*      An entry from the modelist was removed */

#define FB_EVENT_MODE_DELETE            0x04
/*      A driver registered itself */

#define FB_EVENT_FB_REGISTERED          0x05
/*      A driver unregistered itself */

#define FB_EVENT_FB_UNREGISTERED        0x06
/*      CONSOLE-SPECIFIC: get console to framebuffer mapping */

#define FB_EVENT_GET_CONSOLE_MAP        0x07
/*      CONSOLE-SPECIFIC: set console to framebuffer mapping */

#define FB_EVENT_SET_CONSOLE_MAP        0x08
/*      A hardware display blank change occurred */

#define FB_EVENT_BLANK                  0x09
/*      Private modelist is to be replaced */

#define FB_EVENT_NEW_MODELIST           0x0A
/*      The resolution of the passed in fb_info about to change and
        all vc's should be changed         */

/*      A software display blank change occurred */

#define FB_EVENT_CONBLANK               0x0C
/*      Get drawing requirements        */

#define FB_EVENT_GET_REQ                0x0D
/*      Unbind from the console if possible */

#define FB_EVENT_FB_UNBIND              0x0E
/*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */

/*      A hardware display blank early change occured */

#define FB_EARLY_EVENT_BLANK		0x10
/*      A hardware display blank revert early change occured */

#define FB_R_EARLY_EVENT_BLANK		0x11

struct fb_event {
struct fb_info *info;
void *data;

struct fb_blit_caps {
u32 x;
u32 y;
u32 len;
u32 flags;

extern int fb_register_client(struct notifier_block *nb);
extern int fb_unregister_client(struct notifier_block *nb);
extern int fb_notifier_call_chain(unsigned long val, void *v);

static inline int fb_register_client(struct notifier_block *nb) { return 0; }


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static inline int fb_unregister_client(struct notifier_block *nb) { return 0; }


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static inline int fb_notifier_call_chain(unsigned long val, void *v) { return 0; }


Ezequiel García18100.00%1100.00%

; #endif /* * Pixmap structure definition * * The purpose of this structure is to translate data * from the hardware independent format of fbdev to what * format the hardware needs. */ #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ #define FB_PIXMAP_IO 4 /* memory is iomapped */ #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ struct fb_pixmap { u8 *addr; /* pointer to memory */ u32 size; /* size of buffer in bytes */ u32 offset; /* current offset to buffer */ u32 buf_align; /* byte alignment of each bitmap */ u32 scan_align; /* alignment per scanline */ u32 access_align; /* alignment per read/write (bits) */ u32 flags; /* see FB_PIXMAP_* */ u32 blit_x; /* supported bit block dimensions (1-32)*/ u32 blit_y; /* Format: blit_x = 1 << (width - 1) */ /* blit_y = 1 << (height - 1) */ /* if 0, will be set to 0xffffffff (all)*/ /* access methods */ void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); }; #ifdef CONFIG_FB_DEFERRED_IO struct fb_deferred_io { /* delay between mkwrite and deferred handler */ unsigned long delay; struct mutex lock; /* mutex that protects the page list */ struct list_head pagelist; /* list of touched pages */ /* callback */ void (*first_io)(struct fb_info *info); void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); }; #endif /* * Frame buffer operations * * LOCKING NOTE: those functions must _ALL_ be called with the console * semaphore held, this is the only suitable locking mechanism we have * in 2.6. Some may be called at interrupt time at this point though. * * The exception to this is the debug related hooks. Putting the fb * into a debug state (e.g. flipping to the kernel console) and restoring * it must be done in a lock-free manner, so low level drivers should * keep track of the initial console (if applicable) and may need to * perform direct, unlocked hardware writes in these hooks. */ struct fb_ops { /* open/release and usage marking */ struct module *owner; int (*fb_open)(struct fb_info *info, int user); int (*fb_release)(struct fb_info *info, int user); /* For framebuffers with strange non linear layouts or that do not * work with normal memory mapped access */ ssize_t (*fb_read)(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos); ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos); /* checks var and eventually tweaks it to something supported, * DO NOT MODIFY PAR */ int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); /* set the video mode according to info->var */ int (*fb_set_par)(struct fb_info *info); /* set color register */ int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info); /* set color registers in batch */ int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); /* blank display */ int (*fb_blank)(int blank, struct fb_info *info); /* pan display */ int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); /* Draws a rectangle */ void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); /* Copy data from area to another */ void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); /* Draws a image to the display */ void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); /* Draws cursor */ int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); /* wait for blit idle, optional */ int (*fb_sync)(struct fb_info *info); /* perform fb specific ioctl (optional) */ int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, unsigned long arg); /* Handle 32bit compat ioctl (optional) */ int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, unsigned long arg); /* perform fb specific mmap */ int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); /* get capability given var */ void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, struct fb_var_screeninfo *var); /* teardown any resources to do with this framebuffer */ void (*fb_destroy)(struct fb_info *info); /* called at KDB enter and leave time to prepare the console */ int (*fb_debug_enter)(struct fb_info *info); int (*fb_debug_leave)(struct fb_info *info); }; #ifdef CONFIG_FB_TILEBLITTING #define FB_TILE_CURSOR_NONE 0 #define FB_TILE_CURSOR_UNDERLINE 1 #define FB_TILE_CURSOR_LOWER_THIRD 2 #define FB_TILE_CURSOR_LOWER_HALF 3 #define FB_TILE_CURSOR_TWO_THIRDS 4 #define FB_TILE_CURSOR_BLOCK 5 struct fb_tilemap { __u32 width; /* width of each tile in pixels */ __u32 height; /* height of each tile in scanlines */ __u32 depth; /* color depth of each tile */ __u32 length; /* number of tiles in the map */ const __u8 *data; /* actual tile map: a bitmap array, packed to the nearest byte */ }; struct fb_tilerect { __u32 sx; /* origin in the x-axis */ __u32 sy; /* origin in the y-axis */ __u32 width; /* number of tiles in the x-axis */ __u32 height; /* number of tiles in the y-axis */ __u32 index; /* what tile to use: index to tile map */ __u32 fg; /* foreground color */ __u32 bg; /* background color */ __u32 rop; /* raster operation */ }; struct fb_tilearea { __u32 sx; /* source origin in the x-axis */ __u32 sy; /* source origin in the y-axis */ __u32 dx; /* destination origin in the x-axis */ __u32 dy; /* destination origin in the y-axis */ __u32 width; /* number of tiles in the x-axis */ __u32 height; /* number of tiles in the y-axis */ }; struct fb_tileblit { __u32 sx; /* origin in the x-axis */ __u32 sy; /* origin in the y-axis */ __u32 width; /* number of tiles in the x-axis */ __u32 height; /* number of tiles in the y-axis */ __u32 fg; /* foreground color */ __u32 bg; /* background color */ __u32 length; /* number of tiles to draw */ __u32 *indices; /* array of indices to tile map */ }; struct fb_tilecursor { __u32 sx; /* cursor position in the x-axis */ __u32 sy; /* cursor position in the y-axis */ __u32 mode; /* 0 = erase, 1 = draw */ __u32 shape; /* see FB_TILE_CURSOR_* */ __u32 fg; /* foreground color */ __u32 bg; /* background color */ }; struct fb_tile_ops { /* set tile characteristics */ void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); /* all dimensions from hereon are in terms of tiles */ /* move a rectangular region of tiles from one area to another*/ void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); /* fill a rectangular region with a tile */ void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); /* copy an array of tiles */ void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); /* cursor */ void (*fb_tilecursor)(struct fb_info *info, struct fb_tilecursor *cursor); /* get maximum length of the tile map */ int (*fb_get_tilemax)(struct fb_info *info); }; #endif /* CONFIG_FB_TILEBLITTING */ /* FBINFO_* = fb_info.flags bit flags */ #define FBINFO_MODULE 0x0001 /* Low-level driver is a module */ #define FBINFO_HWACCEL_DISABLED 0x0002 /* When FBINFO_HWACCEL_DISABLED is set: * Hardware acceleration is turned off. Software implementations * of required functions (copyarea(), fillrect(), and imageblit()) * takes over; acceleration engine should be in a quiescent state */ /* hints */ #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ /* hardware supported ops */ /* semantics: when a bit is set, it indicates that the operation is * accelerated by hardware. * required functions will still work even if the bit is not set. * optional functions may not even exist if the flag bit is not set. */ #define FBINFO_HWACCEL_NONE 0x0000 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ #define FBINFO_MISC_USEREVENT 0x10000 /* event request from userspace */ #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ /* A driver may set this flag to indicate that it does want a set_par to be * called every time when fbcon_switch is executed. The advantage is that with * this flag set you can really be sure that set_par is always called before * any of the functions dependent on the correct hardware state or altering * that state, even if you are using some broken X releases. The disadvantage * is that it introduces unwanted delays to every console switch if set_par * is slow. It is a good idea to try this flag in the drivers initialization * code whenever there is a bug report related to switching between X and the * framebuffer console. */ #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 /* where the fb is a firmware driver, and can be replaced with a proper one */ #define FBINFO_MISC_FIRMWARE 0x80000 /* * Host and GPU endianness differ. */ #define FBINFO_FOREIGN_ENDIAN 0x100000 /* * Big endian math. This is the same flags as above, but with different * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag * and host endianness. Drivers should not use this flag. */ #define FBINFO_BE_MATH 0x100000 /* report to the VT layer that this fb driver can accept forced console output like oopses */ #define FBINFO_CAN_FORCE_OUTPUT 0x200000 struct fb_info { atomic_t count; int node; int flags; 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 */ #ifdef 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 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 = kzalloc(sizeof(struct apertures_struct) + max_num * sizeof(struct aperture), GFP_KERNEL); if (!a) return NULL; a->count = max_num; return a; }


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#ifdef MODULE #define FBINFO_DEFAULT FBINFO_MODULE #else #define FBINFO_DEFAULT 0 #endif // This will go away #define FBINFO_FLAG_MODULE FBINFO_MODULE #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(__avr32__) || defined(__bfin__) || defined(__arm__) #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 int unregister_framebuffer(struct fb_info *fb_info); extern int unlink_framebuffer(struct fb_info *fb_info); 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