mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-05 09:57:21 +02:00
Linus Torvalds
afac4c66d1
Pull fbdev updates from Helge Deller: "A major refactorization by Thomas Zimmermann from SUSE regarding handling of console font data, addition of helpers for console font rotation and split into individual components for glyphs, fonts and the overall fbcon state. And there is the round of usual code cleanups and fixes: Cleanups: - atyfb: Remove unused fb_list (Geert Uytterhoeven) - goldfishfb, wmt_ge_rops: use devm_platform_ioremap_resource() (Amin GATTOUT) - matroxfb: Mark variable with __maybe_unused (Andy Shevchenko) - omapfb: Add missing error check for clk_get() (Chen Ni) - tdfxfb: Make the VGA register initialisation a bit more obvious (Daniel Palmer) - macfb: Replace deprecated strcpy with strscpy (Thorsten Blum) Fixes: - tdfxfb, udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO (Greg Kroah-Hartman) - omap2: fix inconsistent lock returns in omapfb_mmap (Hongling Zeng) - viafb: check ioremap return value in viafb_lcd_get_mobile_state (Wang Jun)" * tag 'fbdev-for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (40 commits) fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO fbdev: tdfxfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO fbdev: omap2: fix inconsistent lock returns in omapfb_mmap MAINTAINERS: Add dedicated entry for fbcon fbcon: Put font-rotation state into separate struct fbcon: Fill cursor mask in helper function lib/fonts: Implement font rotation lib/fonts: Refactor glyph-rotation helpers lib/fonts: Refactor glyph-pattern helpers lib/fonts: Implement glyph rotation lib/fonts: Clean up Makefile lib/fonts: Provide helpers for calculating glyph pitch and size vt: Implement helpers for struct vc_font in source file fbcon: Avoid OOB font access if console rotation fails fbdev: atyfb: Remove unused fb_list fbdev: matroxfb: Mark variable with __maybe_unused to avoid W=1 build break fbdev: update help text for CONFIG_FB_NVIDIA fbdev: omapfb: Add missing error check for clk_get() fbdev: viafb: check ioremap return value in viafb_lcd_get_mobile_state lib/fonts: Remove internal symbols and macros from public header file ...
228 lines
8.1 KiB
C
228 lines
8.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* console_struct.h
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*
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* Data structure describing single virtual console except for data
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* used by vt.c.
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*
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* Fields marked with [#] must be set by the low-level driver.
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* Fields marked with [!] can be changed by the low-level driver
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* to achieve effects such as fast scrolling by changing the origin.
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*/
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#ifndef _LINUX_CONSOLE_STRUCT_H
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#define _LINUX_CONSOLE_STRUCT_H
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#include <linux/vt.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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struct uni_pagedict;
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#define NPAR 16
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#define VC_TABSTOPS_COUNT 256U
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enum vc_intensity {
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VCI_HALF_BRIGHT,
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VCI_NORMAL,
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VCI_BOLD,
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VCI_MASK = 0x3,
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};
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/**
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* struct vc_state -- state of a VC
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* @x: cursor's x-position
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* @y: cursor's y-position
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* @color: foreground & background colors
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* @Gx_charset: what's G0/G1 slot set to (like GRAF_MAP, LAT1_MAP)
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* @charset: what character set to use (0=G0 or 1=G1)
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* @intensity: see enum vc_intensity for values
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* @reverse: reversed foreground/background colors
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*
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* These members are defined separately from struct vc_data as we save &
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* restore them at times.
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*/
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struct vc_state {
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unsigned int x, y;
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unsigned char color;
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unsigned char Gx_charset[2];
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unsigned int charset : 1;
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/* attribute flags */
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enum vc_intensity intensity;
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bool italic;
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bool underline;
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bool blink;
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bool reverse;
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};
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/**
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* struct vc_font - Describes a font
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* @width: The width of a single glyph in bits
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* @height: The height of a single glyph in scanlines
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* @charcount: The number of glyphs in the font
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* @data: The raw font data
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*
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* Font data is organized as an array of glyphs. Each glyph is a bitmap with
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* set bits indicating the foreground color. Unset bits indicate background
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* color. The fields @width and @height store a single glyph's number of
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* horizontal bits and vertical scanlines. If width is not a multiple of 8,
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* there are trailing bits to fill up the byte. These bits should not be drawn.
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*
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* The field @data points to the first glyph's first byte. The value @charcount
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* gives the number of glyphs in the font. There are no empty scanlines between
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* two adjacent glyphs.
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*/
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struct vc_font {
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unsigned int width;
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unsigned int height;
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unsigned int charcount;
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const unsigned char *data;
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};
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unsigned int vc_font_pitch(const struct vc_font *font);
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unsigned int vc_font_size(const struct vc_font *font);
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/*
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* Example: vc_data of a console that was scrolled 3 lines down.
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*
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* Console buffer
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* vc_screenbuf ---------> +----------------------+-.
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* | initializing W | \
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* | initializing X | |
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* | initializing Y | > scroll-back area
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* | initializing Z | |
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* | | /
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* vc_visible_origin ---> ^+----------------------+-:
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* (changes by scroll) || Welcome to linux | \
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* || | |
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* vc_rows --->< | login: root | | visible on console
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* || password: | > (vc_screenbuf_size is
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* vc_origin -----------> || | | vc_size_row * vc_rows)
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* (start when no scroll) || Last login: 12:28 | /
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* v+----------------------+-:
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* | Have a lot of fun... | \
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* vc_pos -----------------|--------v | > scroll-front area
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* | ~ # cat_ | /
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* vc_scr_end -----------> +----------------------+-:
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* (vc_origin + | | \ EMPTY, to be filled by
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* vc_screenbuf_size) | | / vc_video_erase_char
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* +----------------------+-'
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* <---- 2 * vc_cols ----->
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* <---- vc_size_row ----->
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*
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* Note that every character in the console buffer is accompanied with an
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* attribute in the buffer right after the character. This is not depicted
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* in the figure.
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*/
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struct vc_data {
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struct tty_port port; /* Upper level data */
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struct vc_state state, saved_state;
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unsigned short vc_num; /* Console number */
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unsigned int vc_cols; /* [#] Console size */
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unsigned int vc_rows;
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unsigned int vc_size_row; /* Bytes per row */
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unsigned int vc_scan_lines; /* # of scan lines */
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unsigned int vc_cell_height; /* CRTC character cell height */
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unsigned long vc_origin; /* [!] Start of real screen */
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unsigned long vc_scr_end; /* [!] End of real screen */
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unsigned long vc_visible_origin; /* [!] Top of visible window */
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unsigned int vc_top, vc_bottom; /* Scrolling region */
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const struct consw *vc_sw;
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unsigned short *vc_screenbuf; /* In-memory character/attribute buffer */
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unsigned int vc_screenbuf_size;
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unsigned char vc_mode; /* KD_TEXT, ... */
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/* attributes for all characters on screen */
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unsigned char vc_attr; /* Current attributes */
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unsigned char vc_def_color; /* Default colors */
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unsigned char vc_ulcolor; /* Color for underline mode */
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unsigned char vc_itcolor;
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unsigned char vc_halfcolor; /* Color for half intensity mode */
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/* cursor */
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unsigned int vc_cursor_type;
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unsigned short vc_complement_mask; /* [#] Xor mask for mouse pointer */
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unsigned short vc_s_complement_mask; /* Saved mouse pointer mask */
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unsigned long vc_pos; /* Cursor address */
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/* fonts */
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unsigned short vc_hi_font_mask; /* [#] Attribute set for upper 256 chars of font or 0 if not supported */
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struct vc_font vc_font; /* Current VC font set */
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unsigned short vc_video_erase_char; /* Background erase character */
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/* VT terminal data */
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unsigned int vc_state; /* Escape sequence parser state */
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unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */
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/* data for manual vt switching */
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struct vt_mode vt_mode;
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struct pid *vt_pid;
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int vt_newvt;
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wait_queue_head_t paste_wait;
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/* mode flags */
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unsigned int vc_disp_ctrl : 1; /* Display chars < 32? */
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unsigned int vc_toggle_meta : 1; /* Toggle high bit? */
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unsigned int vc_decscnm : 1; /* Screen Mode */
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unsigned int vc_decom : 1; /* Origin Mode */
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unsigned int vc_decawm : 1; /* Autowrap Mode */
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unsigned int vc_deccm : 1; /* Cursor Visible */
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unsigned int vc_decim : 1; /* Insert Mode */
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/* misc */
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unsigned int vc_priv : 3;
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unsigned int vc_need_wrap : 1;
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unsigned int vc_can_do_color : 1;
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unsigned int vc_report_mouse : 2;
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unsigned int vc_bracketed_paste : 1;
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unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */
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unsigned char vc_utf_count;
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int vc_utf_char;
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DECLARE_BITMAP(vc_tab_stop, VC_TABSTOPS_COUNT); /* Tab stops. 256 columns. */
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unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */
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unsigned short * vc_translate;
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unsigned int vc_bell_pitch; /* Console bell pitch */
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unsigned int vc_bell_duration; /* Console bell duration */
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unsigned short vc_cur_blink_ms; /* Cursor blink duration */
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struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */
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struct uni_pagedict *uni_pagedict;
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struct uni_pagedict **uni_pagedict_loc; /* [!] Location of uni_pagedict variable for this console */
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u32 **vc_uni_lines; /* unicode screen content */
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u16 *vc_saved_screen;
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u32 **vc_saved_uni_lines;
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unsigned int vc_saved_cols;
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unsigned int vc_saved_rows;
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/* additional information is in vt_kern.h */
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};
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struct vc {
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struct vc_data *d;
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struct work_struct SAK_work;
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/* might add scrmem, kbd at some time,
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to have everything in one place */
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};
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extern struct vc vc_cons [MAX_NR_CONSOLES];
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extern void vc_SAK(struct work_struct *work);
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#define CUR_MAKE(size, change, set) ((size) | ((change) << 8) | \
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((set) << 16))
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#define CUR_SIZE(c) ((c) & 0x00000f)
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# define CUR_DEF 0
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# define CUR_NONE 1
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# define CUR_UNDERLINE 2
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# define CUR_LOWER_THIRD 3
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# define CUR_LOWER_HALF 4
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# define CUR_TWO_THIRDS 5
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# define CUR_BLOCK 6
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#define CUR_SW 0x000010
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#define CUR_ALWAYS_BG 0x000020
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#define CUR_INVERT_FG_BG 0x000040
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#define CUR_FG 0x000700
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#define CUR_BG 0x007000
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#define CUR_CHANGE(c) ((c) & 0x00ff00)
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#define CUR_SET(c) (((c) & 0xff0000) >> 8)
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bool con_is_visible(const struct vc_data *vc);
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#endif /* _LINUX_CONSOLE_STRUCT_H */
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