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linux/drivers/video/fbdev/core/fbcon.c
Dave Airlie 86fdf61e71 drm-misc-fixes for v5.9: 
- Small doc fix.
 - Re-add FB_ARMCLCD for android.
 - Fix global-out-of-bounds read in fbcon_get_font().
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Merge tag 'drm-misc-fixes-2020-10-01' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v5.9:
- Small doc fix.
- Re-add FB_ARMCLCD for android.
- Fix global-out-of-bounds read in fbcon_get_font().

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8585daa2-fcbc-3924-ac4f-e7b5668808e0@linux.intel.com
2020-10-06 12:38:28 +10:00

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/*
* linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
*
* Copyright (C) 1995 Geert Uytterhoeven
*
*
* This file is based on the original Amiga console driver (amicon.c):
*
* Copyright (C) 1993 Hamish Macdonald
* Greg Harp
* Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
*
* with work by William Rucklidge (wjr@cs.cornell.edu)
* Geert Uytterhoeven
* Jes Sorensen (jds@kom.auc.dk)
* Martin Apel
*
* and on the original Atari console driver (atacon.c):
*
* Copyright (C) 1993 Bjoern Brauel
* Roman Hodek
*
* with work by Guenther Kelleter
* Martin Schaller
* Andreas Schwab
*
* Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
* Smart redraw scrolling, arbitrary font width support, 512char font support
* and software scrollback added by
* Jakub Jelinek (jj@ultra.linux.cz)
*
* Random hacking by Martin Mares <mj@ucw.cz>
*
* 2001 - Documented with DocBook
* - Brad Douglas <brad@neruo.com>
*
* The low level operations for the various display memory organizations are
* now in separate source files.
*
* Currently the following organizations are supported:
*
* o afb Amiga bitplanes
* o cfb{2,4,8,16,24,32} Packed pixels
* o ilbm Amiga interleaved bitplanes
* o iplan2p[248] Atari interleaved bitplanes
* o mfb Monochrome
* o vga VGA characters/attributes
*
* To do:
*
* - Implement 16 plane mode (iplan2p16)
*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#undef FBCONDEBUG
#include <linux/module.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/delay.h> /* MSch: for IRQ probe */
#include <linux/console.h>
#include <linux/string.h>
#include <linux/kd.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/fbcon.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
#include <linux/font.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/crc32.h> /* For counting font checksums */
#include <linux/uaccess.h>
#include <asm/fb.h>
#include <asm/irq.h>
#include "fbcon.h"
#ifdef FBCONDEBUG
# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
#else
# define DPRINTK(fmt, args...)
#endif
/*
* FIXME: Locking
*
* - fbcon state itself is protected by the console_lock, and the code does a
* pretty good job at making sure that lock is held everywhere it's needed.
*
* - access to the registered_fb array is entirely unprotected. This should use
* proper object lifetime handling, i.e. get/put_fb_info. This also means
* switching from indices to proper pointers for fb_info everywhere.
*
* - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
* means concurrent access to the same fbdev from both fbcon and userspace
* will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
* of fb_lock/unlock protected sections, since otherwise we'll recurse and
* deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
* fbmem.c cannot use locking asserts, and there's lots of callers which get
* the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
*/
enum {
FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
};
static struct fbcon_display fb_display[MAX_NR_CONSOLES];
static signed char con2fb_map[MAX_NR_CONSOLES];
static signed char con2fb_map_boot[MAX_NR_CONSOLES];
static int logo_lines;
/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
enums. */
static int logo_shown = FBCON_LOGO_CANSHOW;
/* console mappings */
static int first_fb_vc;
static int last_fb_vc = MAX_NR_CONSOLES - 1;
static int fbcon_is_default = 1;
static int primary_device = -1;
static int fbcon_has_console_bind;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
static int map_override;
static inline void fbcon_map_override(void)
{
map_override = 1;
}
#else
static inline void fbcon_map_override(void)
{
}
#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
static bool deferred_takeover = true;
#else
#define deferred_takeover false
#endif
/* font data */
static char fontname[40];
/* current fb_info */
static int info_idx = -1;
/* console rotation */
static int initial_rotation = -1;
static int fbcon_has_sysfs;
static int margin_color;
static const struct consw fb_con;
#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
static int fbcon_set_origin(struct vc_data *);
static int fbcon_cursor_noblink;
#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
/*
* Interface used by the world
*/
static const char *fbcon_startup(void);
static void fbcon_init(struct vc_data *vc, int init);
static void fbcon_deinit(struct vc_data *vc);
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
int width);
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
int count, int ypos, int xpos);
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
static void fbcon_cursor(struct vc_data *vc, int mode);
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
int height, int width);
static int fbcon_switch(struct vc_data *vc);
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
/*
* Internal routines
*/
static __inline__ void ywrap_up(struct vc_data *vc, int count);
static __inline__ void ywrap_down(struct vc_data *vc, int count);
static __inline__ void ypan_up(struct vc_data *vc, int count);
static __inline__ void ypan_down(struct vc_data *vc, int count);
static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
int dy, int dx, int height, int width, u_int y_break);
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit);
static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
int line, int count, int dy);
static void fbcon_modechanged(struct fb_info *info);
static void fbcon_set_all_vcs(struct fb_info *info);
static void fbcon_start(void);
static void fbcon_exit(void);
static struct device *fbcon_device;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
static inline void fbcon_set_rotation(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
ops->p->con_rotate < 4)
ops->rotate = ops->p->con_rotate;
else
ops->rotate = 0;
}
static void fbcon_rotate(struct fb_info *info, u32 rotate)
{
struct fbcon_ops *ops= info->fbcon_par;
struct fb_info *fb_info;
if (!ops || ops->currcon == -1)
return;
fb_info = registered_fb[con2fb_map[ops->currcon]];
if (info == fb_info) {
struct fbcon_display *p = &fb_display[ops->currcon];
if (rotate < 4)
p->con_rotate = rotate;
else
p->con_rotate = 0;
fbcon_modechanged(info);
}
}
static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
struct fbcon_display *p;
int i;
if (!ops || ops->currcon < 0 || rotate > 3)
return;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
vc = vc_cons[i].d;
if (!vc || vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[i]] != info)
continue;
p = &fb_display[vc->vc_num];
p->con_rotate = rotate;
}
fbcon_set_all_vcs(info);
}
#else
static inline void fbcon_set_rotation(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
ops->rotate = FB_ROTATE_UR;
}
static void fbcon_rotate(struct fb_info *info, u32 rotate)
{
return;
}
static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
{
return;
}
#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
static int fbcon_get_rotate(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
return (ops) ? ops->rotate : 0;
}
static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
return (info->state != FBINFO_STATE_RUNNING ||
vc->vc_mode != KD_TEXT || ops->graphics);
}
static int get_color(struct vc_data *vc, struct fb_info *info,
u16 c, int is_fg)
{
int depth = fb_get_color_depth(&info->var, &info->fix);
int color = 0;
if (console_blanked) {
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
c = vc->vc_video_erase_char & charmask;
}
if (depth != 1)
color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
: attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
switch (depth) {
case 1:
{
int col = mono_col(info);
/* 0 or 1 */
int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
if (console_blanked)
fg = bg;
color = (is_fg) ? fg : bg;
break;
}
case 2:
/*
* Scale down 16-colors to 4 colors. Default 4-color palette
* is grayscale. However, simply dividing the values by 4
* will not work, as colors 1, 2 and 3 will be scaled-down
* to zero rendering them invisible. So empirically convert
* colors to a sane 4-level grayscale.
*/
switch (color) {
case 0:
color = 0; /* black */
break;
case 1 ... 6:
color = 2; /* white */
break;
case 7 ... 8:
color = 1; /* gray */
break;
default:
color = 3; /* intense white */
break;
}
break;
case 3:
/*
* Last 8 entries of default 16-color palette is a more intense
* version of the first 8 (i.e., same chrominance, different
* luminance).
*/
color &= 7;
break;
}
return color;
}
static void fb_flashcursor(struct work_struct *work)
{
struct fb_info *info = container_of(work, struct fb_info, queue);
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc = NULL;
int c;
int mode;
int ret;
/* FIXME: we should sort out the unbind locking instead */
/* instead we just fail to flash the cursor if we can't get
* the lock instead of blocking fbcon deinit */
ret = console_trylock();
if (ret == 0)
return;
if (ops && ops->currcon != -1)
vc = vc_cons[ops->currcon].d;
if (!vc || !con_is_visible(vc) ||
registered_fb[con2fb_map[vc->vc_num]] != info ||
vc->vc_deccm != 1) {
console_unlock();
return;
}
c = scr_readw((u16 *) vc->vc_pos);
mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
CM_ERASE : CM_DRAW;
ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
console_unlock();
}
static void cursor_timer_handler(struct timer_list *t)
{
struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
struct fb_info *info = ops->info;
queue_work(system_power_efficient_wq, &info->queue);
mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
}
static void fbcon_add_cursor_timer(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
!(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
!fbcon_cursor_noblink) {
if (!info->queue.func)
INIT_WORK(&info->queue, fb_flashcursor);
timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
}
}
static void fbcon_del_cursor_timer(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
if (info->queue.func == fb_flashcursor &&
ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
del_timer_sync(&ops->cursor_timer);
ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
}
}
#ifndef MODULE
static int __init fb_console_setup(char *this_opt)
{
char *options;
int i, j;
if (!this_opt || !*this_opt)
return 1;
while ((options = strsep(&this_opt, ",")) != NULL) {
if (!strncmp(options, "font:", 5)) {
strlcpy(fontname, options + 5, sizeof(fontname));
continue;
}
if (!strncmp(options, "scrollback:", 11)) {
pr_warn("Ignoring scrollback size option\n");
continue;
}
if (!strncmp(options, "map:", 4)) {
options += 4;
if (*options) {
for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
if (!options[j])
j = 0;
con2fb_map_boot[i] =
(options[j++]-'0') % FB_MAX;
}
fbcon_map_override();
}
continue;
}
if (!strncmp(options, "vc:", 3)) {
options += 3;
if (*options)
first_fb_vc = simple_strtoul(options, &options, 10) - 1;
if (first_fb_vc < 0)
first_fb_vc = 0;
if (*options++ == '-')
last_fb_vc = simple_strtoul(options, &options, 10) - 1;
fbcon_is_default = 0;
continue;
}
if (!strncmp(options, "rotate:", 7)) {
options += 7;
if (*options)
initial_rotation = simple_strtoul(options, &options, 0);
if (initial_rotation > 3)
initial_rotation = 0;
continue;
}
if (!strncmp(options, "margin:", 7)) {
options += 7;
if (*options)
margin_color = simple_strtoul(options, &options, 0);
continue;
}
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
if (!strcmp(options, "nodefer")) {
deferred_takeover = false;
continue;
}
#endif
if (!strncmp(options, "logo-pos:", 9)) {
options += 9;
if (!strcmp(options, "center"))
fb_center_logo = true;
continue;
}
if (!strncmp(options, "logo-count:", 11)) {
options += 11;
if (*options)
fb_logo_count = simple_strtol(options, &options, 0);
continue;
}
}
return 1;
}
__setup("fbcon=", fb_console_setup);
#endif
static int search_fb_in_map(int idx)
{
int i, retval = 0;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] == idx)
retval = 1;
}
return retval;
}
static int search_for_mapped_con(void)
{
int i, retval = 0;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] != -1)
retval = 1;
}
return retval;
}
static int do_fbcon_takeover(int show_logo)
{
int err, i;
if (!num_registered_fb)
return -ENODEV;
if (!show_logo)
logo_shown = FBCON_LOGO_DONTSHOW;
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map[i] = info_idx;
err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
fbcon_is_default);
if (err) {
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map[i] = -1;
info_idx = -1;
} else {
fbcon_has_console_bind = 1;
}
return err;
}
#ifdef MODULE
static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
int cols, int rows, int new_cols, int new_rows)
{
logo_shown = FBCON_LOGO_DONTSHOW;
}
#else
static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
int cols, int rows, int new_cols, int new_rows)
{
/* Need to make room for the logo */
struct fbcon_ops *ops = info->fbcon_par;
int cnt, erase = vc->vc_video_erase_char, step;
unsigned short *save = NULL, *r, *q;
int logo_height;
if (info->fbops->owner) {
logo_shown = FBCON_LOGO_DONTSHOW;
return;
}
/*
* remove underline attribute from erase character
* if black and white framebuffer.
*/
if (fb_get_color_depth(&info->var, &info->fix) == 1)
erase &= ~0x400;
logo_height = fb_prepare_logo(info, ops->rotate);
logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row * rows);
step = logo_lines * cols;
for (r = q - logo_lines * cols; r < q; r++)
if (scr_readw(r) != vc->vc_video_erase_char)
break;
if (r != q && new_rows >= rows + logo_lines) {
save = kmalloc(array3_size(logo_lines, new_cols, 2),
GFP_KERNEL);
if (save) {
int i = cols < new_cols ? cols : new_cols;
scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
r = q - step;
for (cnt = 0; cnt < logo_lines; cnt++, r += i)
scr_memcpyw(save + cnt * new_cols, r, 2 * i);
r = q;
}
}
if (r == q) {
/* We can scroll screen down */
r = q - step - cols;
for (cnt = rows - logo_lines; cnt > 0; cnt--) {
scr_memcpyw(r + step, r, vc->vc_size_row);
r -= cols;
}
if (!save) {
int lines;
if (vc->state.y + logo_lines >= rows)
lines = rows - vc->state.y - 1;
else
lines = logo_lines;
vc->state.y += lines;
vc->vc_pos += lines * vc->vc_size_row;
}
}
scr_memsetw((unsigned short *) vc->vc_origin,
erase,
vc->vc_size_row * logo_lines);
if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
fbcon_clear_margins(vc, 0);
update_screen(vc);
}
if (save) {
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row *
rows);
scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
vc->state.y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
kfree(save);
}
if (logo_shown == FBCON_LOGO_DONTSHOW)
return;
if (logo_lines > vc->vc_bottom) {
logo_shown = FBCON_LOGO_CANSHOW;
printk(KERN_INFO
"fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
} else {
logo_shown = FBCON_LOGO_DRAW;
vc->vc_top = logo_lines;
}
}
#endif /* MODULE */
#ifdef CONFIG_FB_TILEBLITTING
static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
ops->p = &fb_display[vc->vc_num];
if ((info->flags & FBINFO_MISC_TILEBLITTING))
fbcon_set_tileops(vc, info);
else {
fbcon_set_rotation(info);
fbcon_set_bitops(ops);
}
}
static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
{
int err = 0;
if (info->flags & FBINFO_MISC_TILEBLITTING &&
info->tileops->fb_get_tilemax(info) < charcount)
err = 1;
return err;
}
#else
static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
info->flags &= ~FBINFO_MISC_TILEBLITTING;
ops->p = &fb_display[vc->vc_num];
fbcon_set_rotation(info);
fbcon_set_bitops(ops);
}
static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
{
return 0;
}
#endif /* CONFIG_MISC_TILEBLITTING */
static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
int unit, int oldidx)
{
struct fbcon_ops *ops = NULL;
int err = 0;
if (!try_module_get(info->fbops->owner))
err = -ENODEV;
if (!err && info->fbops->fb_open &&
info->fbops->fb_open(info, 0))
err = -ENODEV;
if (!err) {
ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
if (!ops)
err = -ENOMEM;
}
if (!err) {
ops->cur_blink_jiffies = HZ / 5;
ops->info = info;
info->fbcon_par = ops;
if (vc)
set_blitting_type(vc, info);
}
if (err) {
con2fb_map[unit] = oldidx;
module_put(info->fbops->owner);
}
return err;
}
static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
struct fb_info *newinfo, int unit,
int oldidx, int found)
{
struct fbcon_ops *ops = oldinfo->fbcon_par;
int err = 0, ret;
if (oldinfo->fbops->fb_release &&
oldinfo->fbops->fb_release(oldinfo, 0)) {
con2fb_map[unit] = oldidx;
if (!found && newinfo->fbops->fb_release)
newinfo->fbops->fb_release(newinfo, 0);
if (!found)
module_put(newinfo->fbops->owner);
err = -ENODEV;
}
if (!err) {
fbcon_del_cursor_timer(oldinfo);
kfree(ops->cursor_state.mask);
kfree(ops->cursor_data);
kfree(ops->cursor_src);
kfree(ops->fontbuffer);
kfree(oldinfo->fbcon_par);
oldinfo->fbcon_par = NULL;
module_put(oldinfo->fbops->owner);
/*
If oldinfo and newinfo are driving the same hardware,
the fb_release() method of oldinfo may attempt to
restore the hardware state. This will leave the
newinfo in an undefined state. Thus, a call to
fb_set_par() may be needed for the newinfo.
*/
if (newinfo && newinfo->fbops->fb_set_par) {
ret = newinfo->fbops->fb_set_par(newinfo);
if (ret)
printk(KERN_ERR "con2fb_release_oldinfo: "
"detected unhandled fb_set_par error, "
"error code %d\n", ret);
}
}
return err;
}
static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
int unit, int show_logo)
{
struct fbcon_ops *ops = info->fbcon_par;
int ret;
ops->currcon = fg_console;
if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
ret = info->fbops->fb_set_par(info);
if (ret)
printk(KERN_ERR "con2fb_init_display: detected "
"unhandled fb_set_par error, "
"error code %d\n", ret);
}
ops->flags |= FBCON_FLAGS_INIT;
ops->graphics = 0;
fbcon_set_disp(info, &info->var, unit);
if (show_logo) {
struct vc_data *fg_vc = vc_cons[fg_console].d;
struct fb_info *fg_info =
registered_fb[con2fb_map[fg_console]];
fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
fg_vc->vc_rows, fg_vc->vc_cols,
fg_vc->vc_rows);
}
update_screen(vc_cons[fg_console].d);
}
/**
* set_con2fb_map - map console to frame buffer device
* @unit: virtual console number to map
* @newidx: frame buffer index to map virtual console to
* @user: user request
*
* Maps a virtual console @unit to a frame buffer device
* @newidx.
*
* This should be called with the console lock held.
*/
static int set_con2fb_map(int unit, int newidx, int user)
{
struct vc_data *vc = vc_cons[unit].d;
int oldidx = con2fb_map[unit];
struct fb_info *info = registered_fb[newidx];
struct fb_info *oldinfo = NULL;
int found, err = 0;
WARN_CONSOLE_UNLOCKED();
if (oldidx == newidx)
return 0;
if (!info)
return -EINVAL;
if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
info_idx = newidx;
return do_fbcon_takeover(0);
}
if (oldidx != -1)
oldinfo = registered_fb[oldidx];
found = search_fb_in_map(newidx);
con2fb_map[unit] = newidx;
if (!err && !found)
err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
/*
* If old fb is not mapped to any of the consoles,
* fbcon should release it.
*/
if (!err && oldinfo && !search_fb_in_map(oldidx))
err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
found);
if (!err) {
int show_logo = (fg_console == 0 && !user &&
logo_shown != FBCON_LOGO_DONTSHOW);
if (!found)
fbcon_add_cursor_timer(info);
con2fb_map_boot[unit] = newidx;
con2fb_init_display(vc, info, unit, show_logo);
}
if (!search_fb_in_map(info_idx))
info_idx = newidx;
return err;
}
/*
* Low Level Operations
*/
/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
static int var_to_display(struct fbcon_display *disp,
struct fb_var_screeninfo *var,
struct fb_info *info)
{
disp->xres_virtual = var->xres_virtual;
disp->yres_virtual = var->yres_virtual;
disp->bits_per_pixel = var->bits_per_pixel;
disp->grayscale = var->grayscale;
disp->nonstd = var->nonstd;
disp->accel_flags = var->accel_flags;
disp->height = var->height;
disp->width = var->width;
disp->red = var->red;
disp->green = var->green;
disp->blue = var->blue;
disp->transp = var->transp;
disp->rotate = var->rotate;
disp->mode = fb_match_mode(var, &info->modelist);
if (disp->mode == NULL)
/* This should not happen */
return -EINVAL;
return 0;
}
static void display_to_var(struct fb_var_screeninfo *var,
struct fbcon_display *disp)
{
fb_videomode_to_var(var, disp->mode);
var->xres_virtual = disp->xres_virtual;
var->yres_virtual = disp->yres_virtual;
var->bits_per_pixel = disp->bits_per_pixel;
var->grayscale = disp->grayscale;
var->nonstd = disp->nonstd;
var->accel_flags = disp->accel_flags;
var->height = disp->height;
var->width = disp->width;
var->red = disp->red;
var->green = disp->green;
var->blue = disp->blue;
var->transp = disp->transp;
var->rotate = disp->rotate;
}
static const char *fbcon_startup(void)
{
const char *display_desc = "frame buffer device";
struct fbcon_display *p = &fb_display[fg_console];
struct vc_data *vc = vc_cons[fg_console].d;
const struct font_desc *font = NULL;
struct module *owner;
struct fb_info *info = NULL;
struct fbcon_ops *ops;
int rows, cols;
/*
* If num_registered_fb is zero, this is a call for the dummy part.
* The frame buffer devices weren't initialized yet.
*/
if (!num_registered_fb || info_idx == -1)
return display_desc;
/*
* Instead of blindly using registered_fb[0], we use info_idx, set by
* fb_console_init();
*/
info = registered_fb[info_idx];
if (!info)
return NULL;
owner = info->fbops->owner;
if (!try_module_get(owner))
return NULL;
if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
module_put(owner);
return NULL;
}
ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
if (!ops) {
module_put(owner);
return NULL;
}
ops->currcon = -1;
ops->graphics = 1;
ops->cur_rotate = -1;
ops->cur_blink_jiffies = HZ / 5;
ops->info = info;
info->fbcon_par = ops;
p->con_rotate = initial_rotation;
if (p->con_rotate == -1)
p->con_rotate = info->fbcon_rotate_hint;
if (p->con_rotate == -1)
p->con_rotate = FB_ROTATE_UR;
set_blitting_type(vc, info);
/* Setup default font */
if (!p->fontdata && !vc->vc_font.data) {
if (!fontname[0] || !(font = find_font(fontname)))
font = get_default_font(info->var.xres,
info->var.yres,
info->pixmap.blit_x,
info->pixmap.blit_y);
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.data = (void *)(p->fontdata = font->data);
vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
} else {
p->fontdata = vc->vc_font.data;
}
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
cols /= vc->vc_font.width;
rows /= vc->vc_font.height;
vc_resize(vc, cols, rows);
DPRINTK("mode: %s\n", info->fix.id);
DPRINTK("visual: %d\n", info->fix.visual);
DPRINTK("res: %dx%d-%d\n", info->var.xres,
info->var.yres,
info->var.bits_per_pixel);
fbcon_add_cursor_timer(info);
return display_desc;
}
static void fbcon_init(struct vc_data *vc, int init)
{
struct fb_info *info;
struct fbcon_ops *ops;
struct vc_data **default_mode = vc->vc_display_fg;
struct vc_data *svc = *default_mode;
struct fbcon_display *t, *p = &fb_display[vc->vc_num];
int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
int cap, ret;
if (WARN_ON(info_idx == -1))
return;
if (con2fb_map[vc->vc_num] == -1)
con2fb_map[vc->vc_num] = info_idx;
info = registered_fb[con2fb_map[vc->vc_num]];
cap = info->flags;
if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
logo_shown = FBCON_LOGO_DONTSHOW;
if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
(info->fix.type == FB_TYPE_TEXT))
logo = 0;
if (var_to_display(p, &info->var, info))
return;
if (!info->fbcon_par)
con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
/* If we are not the first console on this
fb, copy the font from that console */
t = &fb_display[fg_console];
if (!p->fontdata) {
if (t->fontdata) {
struct vc_data *fvc = vc_cons[fg_console].d;
vc->vc_font.data = (void *)(p->fontdata =
fvc->vc_font.data);
vc->vc_font.width = fvc->vc_font.width;
vc->vc_font.height = fvc->vc_font.height;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
} else {
const struct font_desc *font = NULL;
if (!fontname[0] || !(font = find_font(fontname)))
font = get_default_font(info->var.xres,
info->var.yres,
info->pixmap.blit_x,
info->pixmap.blit_y);
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.data = (void *)(p->fontdata = font->data);
vc->vc_font.charcount = 256; /* FIXME Need to
support more fonts */
}
}
if (p->userfont)
charcnt = FNTCHARCNT(p->fontdata);
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
if (charcnt == 256) {
vc->vc_hi_font_mask = 0;
} else {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color)
vc->vc_complement_mask <<= 1;
}
if (!*svc->vc_uni_pagedir_loc)
con_set_default_unimap(svc);
if (!*vc->vc_uni_pagedir_loc)
con_copy_unimap(vc, svc);
ops = info->fbcon_par;
ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
p->con_rotate = initial_rotation;
if (p->con_rotate == -1)
p->con_rotate = info->fbcon_rotate_hint;
if (p->con_rotate == -1)
p->con_rotate = FB_ROTATE_UR;
set_blitting_type(vc, info);
cols = vc->vc_cols;
rows = vc->vc_rows;
new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
new_cols /= vc->vc_font.width;
new_rows /= vc->vc_font.height;
/*
* We must always set the mode. The mode of the previous console
* driver could be in the same resolution but we are using different
* hardware so we have to initialize the hardware.
*
* We need to do it in fbcon_init() to prevent screen corruption.
*/
if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
if (info->fbops->fb_set_par &&
!(ops->flags & FBCON_FLAGS_INIT)) {
ret = info->fbops->fb_set_par(info);
if (ret)
printk(KERN_ERR "fbcon_init: detected "
"unhandled fb_set_par error, "
"error code %d\n", ret);
}
ops->flags |= FBCON_FLAGS_INIT;
}
ops->graphics = 0;
if ((cap & FBINFO_HWACCEL_COPYAREA) &&
!(cap & FBINFO_HWACCEL_DISABLED))
p->scrollmode = SCROLL_MOVE;
else /* default to something safe */
p->scrollmode = SCROLL_REDRAW;
/*
* ++guenther: console.c:vc_allocate() relies on initializing
* vc_{cols,rows}, but we must not set those if we are only
* resizing the console.
*/
if (init) {
vc->vc_cols = new_cols;
vc->vc_rows = new_rows;
} else
vc_resize(vc, new_cols, new_rows);
if (logo)
fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
if (ops->rotate_font && ops->rotate_font(info, vc)) {
ops->rotate = FB_ROTATE_UR;
set_blitting_type(vc, info);
}
ops->p = &fb_display[fg_console];
}
static void fbcon_free_font(struct fbcon_display *p, bool freefont)
{
if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
p->fontdata = NULL;
p->userfont = 0;
}
static void set_vc_hi_font(struct vc_data *vc, bool set);
static void fbcon_deinit(struct vc_data *vc)
{
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fb_info *info;
struct fbcon_ops *ops;
int idx;
bool free_font = true;
idx = con2fb_map[vc->vc_num];
if (idx == -1)
goto finished;
info = registered_fb[idx];
if (!info)
goto finished;
if (info->flags & FBINFO_MISC_FIRMWARE)
free_font = false;
ops = info->fbcon_par;
if (!ops)
goto finished;
if (con_is_visible(vc))
fbcon_del_cursor_timer(info);
ops->flags &= ~FBCON_FLAGS_INIT;
finished:
fbcon_free_font(p, free_font);
if (free_font)
vc->vc_font.data = NULL;
if (vc->vc_hi_font_mask && vc->vc_screenbuf)
set_vc_hi_font(vc, false);
if (!con_is_bound(&fb_con))
fbcon_exit();
if (vc->vc_num == logo_shown)
logo_shown = FBCON_LOGO_CANSHOW;
return;
}
/* ====================================================================== */
/* fbcon_XXX routines - interface used by the world
*
* This system is now divided into two levels because of complications
* caused by hardware scrolling. Top level functions:
*
* fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
*
* handles y values in range [0, scr_height-1] that correspond to real
* screen positions. y_wrap shift means that first line of bitmap may be
* anywhere on this display. These functions convert lineoffsets to
* bitmap offsets and deal with the wrap-around case by splitting blits.
*
* fbcon_bmove_physical_8() -- These functions fast implementations
* fbcon_clear_physical_8() -- of original fbcon_XXX fns.
* fbcon_putc_physical_8() -- (font width != 8) may be added later
*
* WARNING:
*
* At the moment fbcon_putc() cannot blit across vertical wrap boundary
* Implies should only really hardware scroll in rows. Only reason for
* restriction is simplicity & efficiency at the moment.
*/
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
int width)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
u_int y_break;
if (fbcon_is_inactive(vc, info))
return;
if (!height || !width)
return;
if (sy < vc->vc_top && vc->vc_top == logo_lines) {
vc->vc_top = 0;
/*
* If the font dimensions are not an integral of the display
* dimensions then the ops->clear below won't end up clearing
* the margins. Call clear_margins here in case the logo
* bitmap stretched into the margin area.
*/
fbcon_clear_margins(vc, 0);
}
/* Split blits that cross physical y_wrap boundary */
y_break = p->vrows - p->yscroll;
if (sy < y_break && sy + height - 1 >= y_break) {
u_int b = y_break - sy;
ops->clear(vc, info, real_y(p, sy), sx, b, width);
ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
width);
} else
ops->clear(vc, info, real_y(p, sy), sx, height, width);
}
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
int count, int ypos, int xpos)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
if (!fbcon_is_inactive(vc, info))
ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
get_color(vc, info, scr_readw(s), 1),
get_color(vc, info, scr_readw(s), 0));
}
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
{
unsigned short chr;
scr_writew(c, &chr);
fbcon_putcs(vc, &chr, 1, ypos, xpos);
}
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
if (!fbcon_is_inactive(vc, info))
ops->clear_margins(vc, info, margin_color, bottom_only);
}
static void fbcon_cursor(struct vc_data *vc, int mode)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
int c = scr_readw((u16 *) vc->vc_pos);
ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
return;
if (vc->vc_cursor_type & CUR_SW)
fbcon_del_cursor_timer(info);
else
fbcon_add_cursor_timer(info);
ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
}
static int scrollback_phys_max = 0;
static int scrollback_max = 0;
static int scrollback_current = 0;
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit)
{
struct fbcon_display *p, *t;
struct vc_data **default_mode, *vc;
struct vc_data *svc;
struct fbcon_ops *ops = info->fbcon_par;
int rows, cols, charcnt = 256;
p = &fb_display[unit];
if (var_to_display(p, var, info))
return;
vc = vc_cons[unit].d;
if (!vc)
return;
default_mode = vc->vc_display_fg;
svc = *default_mode;
t = &fb_display[svc->vc_num];
if (!vc->vc_font.data) {
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
vc->vc_font.width = (*default_mode)->vc_font.width;
vc->vc_font.height = (*default_mode)->vc_font.height;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
}
if (p->userfont)
charcnt = FNTCHARCNT(p->fontdata);
var->activate = FB_ACTIVATE_NOW;
info->var.activate = var->activate;
var->yoffset = info->var.yoffset;
var->xoffset = info->var.xoffset;
fb_set_var(info, var);
ops->var = info->var;
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
if (charcnt == 256) {
vc->vc_hi_font_mask = 0;
} else {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color)
vc->vc_complement_mask <<= 1;
}
if (!*svc->vc_uni_pagedir_loc)
con_set_default_unimap(svc);
if (!*vc->vc_uni_pagedir_loc)
con_copy_unimap(vc, svc);
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
cols /= vc->vc_font.width;
rows /= vc->vc_font.height;
vc_resize(vc, cols, rows);
if (con_is_visible(vc)) {
update_screen(vc);
}
}
static __inline__ void ywrap_up(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
p->yscroll += count;
if (p->yscroll >= p->vrows) /* Deal with wrap */
p->yscroll -= p->vrows;
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode |= FB_VMODE_YWRAP;
ops->update_start(info);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ywrap_down(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
p->yscroll -= count;
if (p->yscroll < 0) /* Deal with wrap */
p->yscroll += p->vrows;
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode |= FB_VMODE_YWRAP;
ops->update_start(info);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static __inline__ void ypan_up(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
p->yscroll += count;
if (p->yscroll > p->vrows - vc->vc_rows) {
ops->bmove(vc, info, p->vrows - vc->vc_rows,
0, 0, 0, vc->vc_rows, vc->vc_cols);
p->yscroll -= p->vrows - vc->vc_rows;
}
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
fbcon_clear_margins(vc, 1);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
p->yscroll += count;
if (p->yscroll > p->vrows - vc->vc_rows) {
p->yscroll -= p->vrows - vc->vc_rows;
fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
}
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
fbcon_clear_margins(vc, 1);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ypan_down(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
p->yscroll -= count;
if (p->yscroll < 0) {
ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
0, vc->vc_rows, vc->vc_cols);
p->yscroll += p->vrows - vc->vc_rows;
}
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
fbcon_clear_margins(vc, 1);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
p->yscroll -= count;
if (p->yscroll < 0) {
p->yscroll += p->vrows - vc->vc_rows;
fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
}
ops->var.xoffset = 0;
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
fbcon_clear_margins(vc, 1);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
int line, int count, int dy)
{
unsigned short *s = (unsigned short *)
(vc->vc_origin + vc->vc_size_row * line);
while (count--) {
unsigned short *start = s;
unsigned short *le = advance_row(s, 1);
unsigned short c;
int x = 0;
unsigned short attr = 1;
do {
c = scr_readw(s);
if (attr != (c & 0xff00)) {
attr = c & 0xff00;
if (s > start) {
fbcon_putcs(vc, start, s - start,
dy, x);
x += s - start;
start = s;
}
}
console_conditional_schedule();
s++;
} while (s < le);
if (s > start)
fbcon_putcs(vc, start, s - start, dy, x);
console_conditional_schedule();
dy++;
}
}
static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
struct fbcon_display *p, int line, int count, int ycount)
{
int offset = ycount * vc->vc_cols;
unsigned short *d = (unsigned short *)
(vc->vc_origin + vc->vc_size_row * line);
unsigned short *s = d + offset;
struct fbcon_ops *ops = info->fbcon_par;
while (count--) {
unsigned short *start = s;
unsigned short *le = advance_row(s, 1);
unsigned short c;
int x = 0;
do {
c = scr_readw(s);
if (c == scr_readw(d)) {
if (s > start) {
ops->bmove(vc, info, line + ycount, x,
line, x, 1, s-start);
x += s - start + 1;
start = s + 1;
} else {
x++;
start++;
}
}
scr_writew(c, d);
console_conditional_schedule();
s++;
d++;
} while (s < le);
if (s > start)
ops->bmove(vc, info, line + ycount, x, line, x, 1,
s-start);
console_conditional_schedule();
if (ycount > 0)
line++;
else {
line--;
/* NOTE: We subtract two lines from these pointers */
s -= vc->vc_size_row;
d -= vc->vc_size_row;
}
}
}
static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
int line, int count, int offset)
{
unsigned short *d = (unsigned short *)
(vc->vc_origin + vc->vc_size_row * line);
unsigned short *s = d + offset;
while (count--) {
unsigned short *start = s;
unsigned short *le = advance_row(s, 1);
unsigned short c;
int x = 0;
unsigned short attr = 1;
do {
c = scr_readw(s);
if (attr != (c & 0xff00)) {
attr = c & 0xff00;
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start;
start = s;
}
}
if (c == scr_readw(d)) {
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start + 1;
start = s + 1;
} else {
x++;
start++;
}
}
scr_writew(c, d);
console_conditional_schedule();
s++;
d++;
} while (s < le);
if (s > start)
fbcon_putcs(vc, start, s - start, line, x);
console_conditional_schedule();
if (offset > 0)
line++;
else {
line--;
/* NOTE: We subtract two lines from these pointers */
s -= vc->vc_size_row;
d -= vc->vc_size_row;
}
}
}
static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
enum con_scroll dir, unsigned int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_display *p = &fb_display[vc->vc_num];
int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
if (fbcon_is_inactive(vc, info))
return true;
fbcon_cursor(vc, CM_ERASE);
/*
* ++Geert: Only use ywrap/ypan if the console is in text mode
* ++Andrew: Only use ypan on hardware text mode when scrolling the
* whole screen (prevents flicker).
*/
switch (dir) {
case SM_UP:
if (count > vc->vc_rows) /* Maximum realistic size */
count = vc->vc_rows;
if (logo_shown >= 0)
goto redraw_up;
switch (p->scrollmode) {
case SCROLL_MOVE:
fbcon_redraw_blit(vc, info, p, t, b - t - count,
count);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
(b - count)),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return true;
break;
case SCROLL_WRAP_MOVE:
if (b - t - count > 3 * vc->vc_rows >> 2) {
if (t > 0)
fbcon_bmove(vc, 0, 0, count, 0, t,
vc->vc_cols);
ywrap_up(vc, count);
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b - count, 0, b, 0,
vc->vc_rows - b,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
else
goto redraw_up;
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_REDRAW:
if ((p->yscroll + count <=
2 * (p->vrows - vc->vc_rows))
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (t > 0)
fbcon_redraw_move(vc, p, 0, t, count);
ypan_up_redraw(vc, t, count);
if (vc->vc_rows - b > 0)
fbcon_redraw_move(vc, p, b,
vc->vc_rows - b, b);
} else
fbcon_redraw_move(vc, p, t + count, b - t - count, t);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_MOVE:
if ((p->yscroll + count <=
2 * (p->vrows - vc->vc_rows))
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (t > 0)
fbcon_bmove(vc, 0, 0, count, 0, t,
vc->vc_cols);
ypan_up(vc, count);
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b - count, 0, b, 0,
vc->vc_rows - b,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
else
goto redraw_up;
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_REDRAW:
redraw_up:
fbcon_redraw(vc, p, t, b - t - count,
count * vc->vc_cols);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
(b - count)),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return true;
}
break;
case SM_DOWN:
if (count > vc->vc_rows) /* Maximum realistic size */
count = vc->vc_rows;
if (logo_shown >= 0)
goto redraw_down;
switch (p->scrollmode) {
case SCROLL_MOVE:
fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
-count);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
t),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return true;
break;
case SCROLL_WRAP_MOVE:
if (b - t - count > 3 * vc->vc_rows >> 2) {
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b, 0, b - count, 0,
vc->vc_rows - b,
vc->vc_cols);
ywrap_down(vc, count);
if (t > 0)
fbcon_bmove(vc, count, 0, 0, 0, t,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
else
goto redraw_down;
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_MOVE:
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b, 0, b - count, 0,
vc->vc_rows - b,
vc->vc_cols);
ypan_down(vc, count);
if (t > 0)
fbcon_bmove(vc, count, 0, 0, 0, t,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
else
goto redraw_down;
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_REDRAW:
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (vc->vc_rows - b > 0)
fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
b - count);
ypan_down_redraw(vc, t, count);
if (t > 0)
fbcon_redraw_move(vc, p, count, t, 0);
} else
fbcon_redraw_move(vc, p, t, b - t - count, t + count);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_REDRAW:
redraw_down:
fbcon_redraw(vc, p, b - 1, b - t - count,
-count * vc->vc_cols);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
t),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return true;
}
}
return false;
}
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
int height, int width)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_display *p = &fb_display[vc->vc_num];
if (fbcon_is_inactive(vc, info))
return;
if (!width || !height)
return;
/* Split blits that cross physical y_wrap case.
* Pathological case involves 4 blits, better to use recursive
* code rather than unrolled case
*
* Recursive invocations don't need to erase the cursor over and
* over again, so we use fbcon_bmove_rec()
*/
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
p->vrows - p->yscroll);
}
static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
int dy, int dx, int height, int width, u_int y_break)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
u_int b;
if (sy < y_break && sy + height > y_break) {
b = y_break - sy;
if (dy < sy) { /* Avoid trashing self */
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
} else {
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
}
return;
}
if (dy < y_break && dy + height > y_break) {
b = y_break - dy;
if (dy < sy) { /* Avoid trashing self */
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
} else {
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
}
return;
}
ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
height, width);
}
static void updatescrollmode(struct fbcon_display *p,
struct fb_info *info,
struct vc_data *vc)
{
struct fbcon_ops *ops = info->fbcon_par;
int fh = vc->vc_font.height;
int cap = info->flags;
u16 t = 0;
int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
info->fix.xpanstep);
int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
info->var.xres_virtual);
int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
divides(ypan, vc->vc_font.height) && vyres > yres;
int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
divides(ywrap, vc->vc_font.height) &&
divides(vc->vc_font.height, vyres) &&
divides(vc->vc_font.height, yres);
int reading_fast = cap & FBINFO_READS_FAST;
int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
!(cap & FBINFO_HWACCEL_DISABLED);
int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
!(cap & FBINFO_HWACCEL_DISABLED);
p->vrows = vyres/fh;
if (yres > (fh * (vc->vc_rows + 1)))
p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
if ((yres % fh) && (vyres % fh < yres % fh))
p->vrows--;
if (good_wrap || good_pan) {
if (reading_fast || fast_copyarea)
p->scrollmode = good_wrap ?
SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
else
p->scrollmode = good_wrap ? SCROLL_REDRAW :
SCROLL_PAN_REDRAW;
} else {
if (reading_fast || (fast_copyarea && !fast_imageblit))
p->scrollmode = SCROLL_MOVE;
else
p->scrollmode = SCROLL_REDRAW;
}
}
#define PITCH(w) (((w) + 7) >> 3)
#define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
static int fbcon_resize(struct vc_data *vc, unsigned int width,
unsigned int height, unsigned int user)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fb_var_screeninfo var = info->var;
int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
if (p->userfont && FNTSIZE(vc->vc_font.data)) {
int size;
int pitch = PITCH(vc->vc_font.width);
/*
* If user font, ensure that a possible change to user font
* height or width will not allow a font data out-of-bounds access.
* NOTE: must use original charcount in calculation as font
* charcount can change and cannot be used to determine the
* font data allocated size.
*/
if (pitch <= 0)
return -EINVAL;
size = CALC_FONTSZ(vc->vc_font.height, pitch, FNTCHARCNT(vc->vc_font.data));
if (size > FNTSIZE(vc->vc_font.data))
return -EINVAL;
}
virt_w = FBCON_SWAP(ops->rotate, width, height);
virt_h = FBCON_SWAP(ops->rotate, height, width);
virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
vc->vc_font.height);
virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
vc->vc_font.width);
var.xres = virt_w * virt_fw;
var.yres = virt_h * virt_fh;
x_diff = info->var.xres - var.xres;
y_diff = info->var.yres - var.yres;
if (x_diff < 0 || x_diff > virt_fw ||
y_diff < 0 || y_diff > virt_fh) {
const struct fb_videomode *mode;
DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
mode = fb_find_best_mode(&var, &info->modelist);
if (mode == NULL)
return -EINVAL;
display_to_var(&var, p);
fb_videomode_to_var(&var, mode);
if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
return -EINVAL;
DPRINTK("resize now %ix%i\n", var.xres, var.yres);
if (con_is_visible(vc)) {
var.activate = FB_ACTIVATE_NOW |
FB_ACTIVATE_FORCE;
fb_set_var(info, &var);
}
var_to_display(p, &info->var, info);
ops->var = info->var;
}
updatescrollmode(p, info, vc);
return 0;
}
static int fbcon_switch(struct vc_data *vc)
{
struct fb_info *info, *old_info = NULL;
struct fbcon_ops *ops;
struct fbcon_display *p = &fb_display[vc->vc_num];
struct fb_var_screeninfo var;
int i, ret, prev_console, charcnt = 256;
info = registered_fb[con2fb_map[vc->vc_num]];
ops = info->fbcon_par;
if (logo_shown >= 0) {
struct vc_data *conp2 = vc_cons[logo_shown].d;
if (conp2->vc_top == logo_lines
&& conp2->vc_bottom == conp2->vc_rows)
conp2->vc_top = 0;
logo_shown = FBCON_LOGO_CANSHOW;
}
prev_console = ops->currcon;
if (prev_console != -1)
old_info = registered_fb[con2fb_map[prev_console]];
/*
* FIXME: If we have multiple fbdev's loaded, we need to
* update all info->currcon. Perhaps, we can place this
* in a centralized structure, but this might break some
* drivers.
*
* info->currcon = vc->vc_num;
*/
for_each_registered_fb(i) {
if (registered_fb[i]->fbcon_par) {
struct fbcon_ops *o = registered_fb[i]->fbcon_par;
o->currcon = vc->vc_num;
}
}
memset(&var, 0, sizeof(struct fb_var_screeninfo));
display_to_var(&var, p);
var.activate = FB_ACTIVATE_NOW;
/*
* make sure we don't unnecessarily trip the memcmp()
* in fb_set_var()
*/
info->var.activate = var.activate;
var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
fb_set_var(info, &var);
ops->var = info->var;
if (old_info != NULL && (old_info != info ||
info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
if (info->fbops->fb_set_par) {
ret = info->fbops->fb_set_par(info);
if (ret)
printk(KERN_ERR "fbcon_switch: detected "
"unhandled fb_set_par error, "
"error code %d\n", ret);
}
if (old_info != info)
fbcon_del_cursor_timer(old_info);
}
if (fbcon_is_inactive(vc, info) ||
ops->blank_state != FB_BLANK_UNBLANK)
fbcon_del_cursor_timer(info);
else
fbcon_add_cursor_timer(info);
set_blitting_type(vc, info);
ops->cursor_reset = 1;
if (ops->rotate_font && ops->rotate_font(info, vc)) {
ops->rotate = FB_ROTATE_UR;
set_blitting_type(vc, info);
}
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
if (p->userfont)
charcnt = FNTCHARCNT(vc->vc_font.data);
if (charcnt > 256)
vc->vc_complement_mask <<= 1;
updatescrollmode(p, info, vc);
switch (p->scrollmode) {
case SCROLL_WRAP_MOVE:
scrollback_phys_max = p->vrows - vc->vc_rows;
break;
case SCROLL_PAN_MOVE:
case SCROLL_PAN_REDRAW:
scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
if (scrollback_phys_max < 0)
scrollback_phys_max = 0;
break;
default:
scrollback_phys_max = 0;
break;
}
scrollback_max = 0;
scrollback_current = 0;
if (!fbcon_is_inactive(vc, info)) {
ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
ops->update_start(info);
}
fbcon_set_palette(vc, color_table);
fbcon_clear_margins(vc, 0);
if (logo_shown == FBCON_LOGO_DRAW) {
logo_shown = fg_console;
/* This is protected above by initmem_freed */
fb_show_logo(info, ops->rotate);
update_region(vc,
vc->vc_origin + vc->vc_size_row * vc->vc_top,
vc->vc_size_row * (vc->vc_bottom -
vc->vc_top) / 2);
return 0;
}
return 1;
}
static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
int blank)
{
if (blank) {
unsigned short charmask = vc->vc_hi_font_mask ?
0x1ff : 0xff;
unsigned short oldc;
oldc = vc->vc_video_erase_char;
vc->vc_video_erase_char &= charmask;
fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
vc->vc_video_erase_char = oldc;
}
}
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
if (mode_switch) {
struct fb_var_screeninfo var = info->var;
ops->graphics = 1;
if (!blank) {
var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
FB_ACTIVATE_KD_TEXT;
fb_set_var(info, &var);
ops->graphics = 0;
ops->var = info->var;
}
}
if (!fbcon_is_inactive(vc, info)) {
if (ops->blank_state != blank) {
ops->blank_state = blank;
fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
ops->cursor_flash = (!blank);
if (fb_blank(info, blank))
fbcon_generic_blank(vc, info, blank);
}
if (!blank)
update_screen(vc);
}
if (mode_switch || fbcon_is_inactive(vc, info) ||
ops->blank_state != FB_BLANK_UNBLANK)
fbcon_del_cursor_timer(info);
else
fbcon_add_cursor_timer(info);
return 0;
}
static int fbcon_debug_enter(struct vc_data *vc)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
ops->save_graphics = ops->graphics;
ops->graphics = 0;
if (info->fbops->fb_debug_enter)
info->fbops->fb_debug_enter(info);
fbcon_set_palette(vc, color_table);
return 0;
}
static int fbcon_debug_leave(struct vc_data *vc)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
ops->graphics = ops->save_graphics;
if (info->fbops->fb_debug_leave)
info->fbops->fb_debug_leave(info);
return 0;
}
static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
{
u8 *fontdata = vc->vc_font.data;
u8 *data = font->data;
int i, j;
font->width = vc->vc_font.width;
font->height = vc->vc_font.height;
font->charcount = vc->vc_hi_font_mask ? 512 : 256;
if (!font->data)
return 0;
if (font->width <= 8) {
j = vc->vc_font.height;
if (font->charcount * j > FNTSIZE(fontdata))
return -EINVAL;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 32 - j);
data += 32;
fontdata += j;
}
} else if (font->width <= 16) {
j = vc->vc_font.height * 2;
if (font->charcount * j > FNTSIZE(fontdata))
return -EINVAL;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 64 - j);
data += 64;
fontdata += j;
}
} else if (font->width <= 24) {
if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
return -EINVAL;
for (i = 0; i < font->charcount; i++) {
for (j = 0; j < vc->vc_font.height; j++) {
*data++ = fontdata[0];
*data++ = fontdata[1];
*data++ = fontdata[2];
fontdata += sizeof(u32);
}
memset(data, 0, 3 * (32 - j));
data += 3 * (32 - j);
}
} else {
j = vc->vc_font.height * 4;
if (font->charcount * j > FNTSIZE(fontdata))
return -EINVAL;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 128 - j);
data += 128;
fontdata += j;
}
}
return 0;
}
/* set/clear vc_hi_font_mask and update vc attrs accordingly */
static void set_vc_hi_font(struct vc_data *vc, bool set)
{
if (!set) {
vc->vc_hi_font_mask = 0;
if (vc->vc_can_do_color) {
vc->vc_complement_mask >>= 1;
vc->vc_s_complement_mask >>= 1;
}
/* ++Edmund: reorder the attribute bits */
if (vc->vc_can_do_color) {
unsigned short *cp =
(unsigned short *) vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
unsigned short c;
for (; count > 0; count--, cp++) {
c = scr_readw(cp);
scr_writew(((c & 0xfe00) >> 1) |
(c & 0xff), cp);
}
c = vc->vc_video_erase_char;
vc->vc_video_erase_char =
((c & 0xfe00) >> 1) | (c & 0xff);
vc->vc_attr >>= 1;
}
} else {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color) {
vc->vc_complement_mask <<= 1;
vc->vc_s_complement_mask <<= 1;
}
/* ++Edmund: reorder the attribute bits */
{
unsigned short *cp =
(unsigned short *) vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
unsigned short c;
for (; count > 0; count--, cp++) {
unsigned short newc;
c = scr_readw(cp);
if (vc->vc_can_do_color)
newc =
((c & 0xff00) << 1) | (c &
0xff);
else
newc = c & ~0x100;
scr_writew(newc, cp);
}
c = vc->vc_video_erase_char;
if (vc->vc_can_do_color) {
vc->vc_video_erase_char =
((c & 0xff00) << 1) | (c & 0xff);
vc->vc_attr <<= 1;
} else
vc->vc_video_erase_char = c & ~0x100;
}
}
}
static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
const u8 * data, int userfont)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct fbcon_display *p = &fb_display[vc->vc_num];
int resize;
int cnt;
char *old_data = NULL;
resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
if (p->userfont)
old_data = vc->vc_font.data;
if (userfont)
cnt = FNTCHARCNT(data);
else
cnt = 256;
vc->vc_font.data = (void *)(p->fontdata = data);
if ((p->userfont = userfont))
REFCOUNT(data)++;
vc->vc_font.width = w;
vc->vc_font.height = h;
if (vc->vc_hi_font_mask && cnt == 256)
set_vc_hi_font(vc, false);
else if (!vc->vc_hi_font_mask && cnt == 512)
set_vc_hi_font(vc, true);
if (resize) {
int cols, rows;
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
cols /= w;
rows /= h;
vc_resize(vc, cols, rows);
} else if (con_is_visible(vc)
&& vc->vc_mode == KD_TEXT) {
fbcon_clear_margins(vc, 0);
update_screen(vc);
}
if (old_data && (--REFCOUNT(old_data) == 0))
kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
return 0;
}
static int fbcon_copy_font(struct vc_data *vc, int con)
{
struct fbcon_display *od = &fb_display[con];
struct console_font *f = &vc->vc_font;
if (od->fontdata == f->data)
return 0; /* already the same font... */
return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
}
/*
* User asked to set font; we are guaranteed that
* a) width and height are in range 1..32
* b) charcount does not exceed 512
* but lets not assume that, since someone might someday want to use larger
* fonts. And charcount of 512 is small for unicode support.
*
* However, user space gives the font in 32 rows , regardless of
* actual font height. So a new API is needed if support for larger fonts
* is ever implemented.
*/
static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
unsigned int flags)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
unsigned charcount = font->charcount;
int w = font->width;
int h = font->height;
int size;
int i, csum;
u8 *new_data, *data = font->data;
int pitch = PITCH(font->width);
/* Is there a reason why fbconsole couldn't handle any charcount >256?
* If not this check should be changed to charcount < 256 */
if (charcount != 256 && charcount != 512)
return -EINVAL;
/* Make sure drawing engine can handle the font */
if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
!(info->pixmap.blit_y & (1 << (font->height - 1))))
return -EINVAL;
/* Make sure driver can handle the font length */
if (fbcon_invalid_charcount(info, charcount))
return -EINVAL;
size = CALC_FONTSZ(h, pitch, charcount);
new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
if (!new_data)
return -ENOMEM;
new_data += FONT_EXTRA_WORDS * sizeof(int);
FNTSIZE(new_data) = size;
FNTCHARCNT(new_data) = charcount;
REFCOUNT(new_data) = 0; /* usage counter */
for (i=0; i< charcount; i++) {
memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
}
/* Since linux has a nice crc32 function use it for counting font
* checksums. */
csum = crc32(0, new_data, size);
FNTSUM(new_data) = csum;
/* Check if the same font is on some other console already */
for (i = first_fb_vc; i <= last_fb_vc; i++) {
struct vc_data *tmp = vc_cons[i].d;
if (fb_display[i].userfont &&
fb_display[i].fontdata &&
FNTSUM(fb_display[i].fontdata) == csum &&
FNTSIZE(fb_display[i].fontdata) == size &&
tmp->vc_font.width == w &&
!memcmp(fb_display[i].fontdata, new_data, size)) {
kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
new_data = (u8 *)fb_display[i].fontdata;
break;
}
}
return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
}
static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
const struct font_desc *f;
if (!name)
f = get_default_font(info->var.xres, info->var.yres,
info->pixmap.blit_x, info->pixmap.blit_y);
else if (!(f = find_font(name)))
return -ENOENT;
font->width = f->width;
font->height = f->height;
return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
}
static u16 palette_red[16];
static u16 palette_green[16];
static u16 palette_blue[16];
static struct fb_cmap palette_cmap = {
0, 16, palette_red, palette_green, palette_blue, NULL
};
static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
int i, j, k, depth;
u8 val;
if (fbcon_is_inactive(vc, info))
return;
if (!con_is_visible(vc))
return;
depth = fb_get_color_depth(&info->var, &info->fix);
if (depth > 3) {
for (i = j = 0; i < 16; i++) {
k = table[i];
val = vc->vc_palette[j++];
palette_red[k] = (val << 8) | val;
val = vc->vc_palette[j++];
palette_green[k] = (val << 8) | val;
val = vc->vc_palette[j++];
palette_blue[k] = (val << 8) | val;
}
palette_cmap.len = 16;
palette_cmap.start = 0;
/*
* If framebuffer is capable of less than 16 colors,
* use default palette of fbcon.
*/
} else
fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
fb_set_cmap(&palette_cmap, info);
}
static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
{
return (u16 *) (vc->vc_origin + offset);
}
static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
int *px, int *py)
{
unsigned long ret;
int x, y;
if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
unsigned long offset = (pos - vc->vc_origin) / 2;
x = offset % vc->vc_cols;
y = offset / vc->vc_cols;
ret = pos + (vc->vc_cols - x) * 2;
} else {
/* Should not happen */
x = y = 0;
ret = vc->vc_origin;
}
if (px)
*px = x;
if (py)
*py = y;
return ret;
}
/* As we might be inside of softback, we may work with non-contiguous buffer,
that's why we have to use a separate routine. */
static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
{
while (cnt--) {
u16 a = scr_readw(p);
if (!vc->vc_can_do_color)
a ^= 0x0800;
else if (vc->vc_hi_font_mask == 0x100)
a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
(((a) & 0x0e00) << 4);
else
a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
(((a) & 0x0700) << 4);
scr_writew(a, p++);
}
}
static int fbcon_set_origin(struct vc_data *vc)
{
return 0;
}
void fbcon_suspended(struct fb_info *info)
{
struct vc_data *vc = NULL;
struct fbcon_ops *ops = info->fbcon_par;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
/* Clear cursor, restore saved data */
fbcon_cursor(vc, CM_ERASE);
}
void fbcon_resumed(struct fb_info *info)
{
struct vc_data *vc;
struct fbcon_ops *ops = info->fbcon_par;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
update_screen(vc);
}
static void fbcon_modechanged(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
struct fbcon_display *p;
int rows, cols;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
if (vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[ops->currcon]] != info)
return;
p = &fb_display[vc->vc_num];
set_blitting_type(vc, info);
if (con_is_visible(vc)) {
var_to_display(p, &info->var, info);
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
cols /= vc->vc_font.width;
rows /= vc->vc_font.height;
vc_resize(vc, cols, rows);
updatescrollmode(p, info, vc);
scrollback_max = 0;
scrollback_current = 0;
if (!fbcon_is_inactive(vc, info)) {
ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
ops->update_start(info);
}
fbcon_set_palette(vc, color_table);
update_screen(vc);
}
}
static void fbcon_set_all_vcs(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
struct fbcon_display *p;
int i, rows, cols, fg = -1;
if (!ops || ops->currcon < 0)
return;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
vc = vc_cons[i].d;
if (!vc || vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[i]] != info)
continue;
if (con_is_visible(vc)) {
fg = i;
continue;
}
p = &fb_display[vc->vc_num];
set_blitting_type(vc, info);
var_to_display(p, &info->var, info);
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
cols /= vc->vc_font.width;
rows /= vc->vc_font.height;
vc_resize(vc, cols, rows);
}
if (fg != -1)
fbcon_modechanged(info);
}
void fbcon_update_vcs(struct fb_info *info, bool all)
{
if (all)
fbcon_set_all_vcs(info);
else
fbcon_modechanged(info);
}
EXPORT_SYMBOL(fbcon_update_vcs);
int fbcon_mode_deleted(struct fb_info *info,
struct fb_videomode *mode)
{
struct fb_info *fb_info;
struct fbcon_display *p;
int i, j, found = 0;
/* before deletion, ensure that mode is not in use */
for (i = first_fb_vc; i <= last_fb_vc; i++) {
j = con2fb_map[i];
if (j == -1)
continue;
fb_info = registered_fb[j];
if (fb_info != info)
continue;
p = &fb_display[i];
if (!p || !p->mode)
continue;
if (fb_mode_is_equal(p->mode, mode)) {
found = 1;
break;
}
}
return found;
}
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
static void fbcon_unbind(void)
{
int ret;
ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
fbcon_is_default);
if (!ret)
fbcon_has_console_bind = 0;
}
#else
static inline void fbcon_unbind(void) {}
#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
/* called with console_lock held */
void fbcon_fb_unbind(struct fb_info *info)
{
int i, new_idx = -1, ret = 0;
int idx = info->node;
WARN_CONSOLE_UNLOCKED();
if (!fbcon_has_console_bind)
return;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] != idx &&
con2fb_map[i] != -1) {
new_idx = con2fb_map[i];
break;
}
}
if (new_idx != -1) {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] == idx)
set_con2fb_map(i, new_idx, 0);
}
} else {
struct fb_info *info = registered_fb[idx];
/* This is sort of like set_con2fb_map, except it maps
* the consoles to no device and then releases the
* oldinfo to free memory and cancel the cursor blink
* timer. I can imagine this just becoming part of
* set_con2fb_map where new_idx is -1
*/
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] == idx) {
con2fb_map[i] = -1;
if (!search_fb_in_map(idx)) {
ret = con2fb_release_oldinfo(vc_cons[i].d,
info, NULL, i,
idx, 0);
if (ret) {
con2fb_map[i] = idx;
return;
}
}
}
}
fbcon_unbind();
}
}
/* called with console_lock held */
void fbcon_fb_unregistered(struct fb_info *info)
{
int i, idx;
WARN_CONSOLE_UNLOCKED();
if (deferred_takeover)
return;
idx = info->node;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] == idx)
con2fb_map[i] = -1;
}
if (idx == info_idx) {
info_idx = -1;
for_each_registered_fb(i) {
info_idx = i;
break;
}
}
if (info_idx != -1) {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map[i] == -1)
con2fb_map[i] = info_idx;
}
}
if (primary_device == idx)
primary_device = -1;
if (!num_registered_fb)
do_unregister_con_driver(&fb_con);
}
void fbcon_remap_all(struct fb_info *info)
{
int i, idx = info->node;
console_lock();
if (deferred_takeover) {
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map_boot[i] = idx;
fbcon_map_override();
console_unlock();
return;
}
for (i = first_fb_vc; i <= last_fb_vc; i++)
set_con2fb_map(i, idx, 0);
if (con_is_bound(&fb_con)) {
printk(KERN_INFO "fbcon: Remapping primary device, "
"fb%i, to tty %i-%i\n", idx,
first_fb_vc + 1, last_fb_vc + 1);
info_idx = idx;
}
console_unlock();
}
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
static void fbcon_select_primary(struct fb_info *info)
{
if (!map_override && primary_device == -1 &&
fb_is_primary_device(info)) {
int i;
printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
info->fix.id, info->node);
primary_device = info->node;
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map_boot[i] = primary_device;
if (con_is_bound(&fb_con)) {
printk(KERN_INFO "fbcon: Remapping primary device, "
"fb%i, to tty %i-%i\n", info->node,
first_fb_vc + 1, last_fb_vc + 1);
info_idx = primary_device;
}
}
}
#else
static inline void fbcon_select_primary(struct fb_info *info)
{
return;
}
#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
/* called with console_lock held */
int fbcon_fb_registered(struct fb_info *info)
{
int ret = 0, i, idx;
WARN_CONSOLE_UNLOCKED();
idx = info->node;
fbcon_select_primary(info);
if (deferred_takeover) {
pr_info("fbcon: Deferring console take-over\n");
return 0;
}
if (info_idx == -1) {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map_boot[i] == idx) {
info_idx = idx;
break;
}
}
if (info_idx != -1)
ret = do_fbcon_takeover(1);
} else {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (con2fb_map_boot[i] == idx)
set_con2fb_map(i, idx, 0);
}
}
return ret;
}
void fbcon_fb_blanked(struct fb_info *info, int blank)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
if (vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[ops->currcon]] != info)
return;
if (con_is_visible(vc)) {
if (blank)
do_blank_screen(0);
else
do_unblank_screen(0);
}
ops->blank_state = blank;
}
void fbcon_new_modelist(struct fb_info *info)
{
int i;
struct vc_data *vc;
struct fb_var_screeninfo var;
const struct fb_videomode *mode;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
if (registered_fb[con2fb_map[i]] != info)
continue;
if (!fb_display[i].mode)
continue;
vc = vc_cons[i].d;
display_to_var(&var, &fb_display[i]);
mode = fb_find_nearest_mode(fb_display[i].mode,
&info->modelist);
fb_videomode_to_var(&var, mode);
fbcon_set_disp(info, &var, vc->vc_num);
}
}
void fbcon_get_requirement(struct fb_info *info,
struct fb_blit_caps *caps)
{
struct vc_data *vc;
struct fbcon_display *p;
if (caps->flags) {
int i, charcnt;
for (i = first_fb_vc; i <= last_fb_vc; i++) {
vc = vc_cons[i].d;
if (vc && vc->vc_mode == KD_TEXT &&
info->node == con2fb_map[i]) {
p = &fb_display[i];
caps->x |= 1 << (vc->vc_font.width - 1);
caps->y |= 1 << (vc->vc_font.height - 1);
charcnt = (p->userfont) ?
FNTCHARCNT(p->fontdata) : 256;
if (caps->len < charcnt)
caps->len = charcnt;
}
}
} else {
vc = vc_cons[fg_console].d;
if (vc && vc->vc_mode == KD_TEXT &&
info->node == con2fb_map[fg_console]) {
p = &fb_display[fg_console];
caps->x = 1 << (vc->vc_font.width - 1);
caps->y = 1 << (vc->vc_font.height - 1);
caps->len = (p->userfont) ?
FNTCHARCNT(p->fontdata) : 256;
}
}
}
int fbcon_set_con2fb_map_ioctl(void __user *argp)
{
struct fb_con2fbmap con2fb;
int ret;
if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
return -EFAULT;
if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
return -EINVAL;
if (con2fb.framebuffer >= FB_MAX)
return -EINVAL;
if (!registered_fb[con2fb.framebuffer])
request_module("fb%d", con2fb.framebuffer);
if (!registered_fb[con2fb.framebuffer]) {
return -EINVAL;
}
console_lock();
ret = set_con2fb_map(con2fb.console - 1,
con2fb.framebuffer, 1);
console_unlock();
return ret;
}
int fbcon_get_con2fb_map_ioctl(void __user *argp)
{
struct fb_con2fbmap con2fb;
if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
return -EFAULT;
if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
return -EINVAL;
console_lock();
con2fb.framebuffer = con2fb_map[con2fb.console - 1];
console_unlock();
return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
}
/*
* The console `switch' structure for the frame buffer based console
*/
static const struct consw fb_con = {
.owner = THIS_MODULE,
.con_startup = fbcon_startup,
.con_init = fbcon_init,
.con_deinit = fbcon_deinit,
.con_clear = fbcon_clear,
.con_putc = fbcon_putc,
.con_putcs = fbcon_putcs,
.con_cursor = fbcon_cursor,
.con_scroll = fbcon_scroll,
.con_switch = fbcon_switch,
.con_blank = fbcon_blank,
.con_font_set = fbcon_set_font,
.con_font_get = fbcon_get_font,
.con_font_default = fbcon_set_def_font,
.con_font_copy = fbcon_copy_font,
.con_set_palette = fbcon_set_palette,
.con_set_origin = fbcon_set_origin,
.con_invert_region = fbcon_invert_region,
.con_screen_pos = fbcon_screen_pos,
.con_getxy = fbcon_getxy,
.con_resize = fbcon_resize,
.con_debug_enter = fbcon_debug_enter,
.con_debug_leave = fbcon_debug_leave,
};
static ssize_t store_rotate(struct device *device,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct fb_info *info;
int rotate, idx;
char **last = NULL;
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate(info, rotate);
err:
console_unlock();
return count;
}
static ssize_t store_rotate_all(struct device *device,
struct device_attribute *attr,const char *buf,
size_t count)
{
struct fb_info *info;
int rotate, idx;
char **last = NULL;
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = simple_strtoul(buf, last, 0);
fbcon_rotate_all(info, rotate);
err:
console_unlock();
return count;
}
static ssize_t show_rotate(struct device *device,
struct device_attribute *attr,char *buf)
{
struct fb_info *info;
int rotate = 0, idx;
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
rotate = fbcon_get_rotate(info);
err:
console_unlock();
return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
}
static ssize_t show_cursor_blink(struct device *device,
struct device_attribute *attr, char *buf)
{
struct fb_info *info;
struct fbcon_ops *ops;
int idx, blink = -1;
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
ops = info->fbcon_par;
if (!ops)
goto err;
blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
err:
console_unlock();
return snprintf(buf, PAGE_SIZE, "%d\n", blink);
}
static ssize_t store_cursor_blink(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fb_info *info;
int blink, idx;
char **last = NULL;
console_lock();
idx = con2fb_map[fg_console];
if (idx == -1 || registered_fb[idx] == NULL)
goto err;
info = registered_fb[idx];
if (!info->fbcon_par)
goto err;
blink = simple_strtoul(buf, last, 0);
if (blink) {
fbcon_cursor_noblink = 0;
fbcon_add_cursor_timer(info);
} else {
fbcon_cursor_noblink = 1;
fbcon_del_cursor_timer(info);
}
err:
console_unlock();
return count;
}
static struct device_attribute device_attrs[] = {
__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
__ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
__ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
store_cursor_blink),
};
static int fbcon_init_device(void)
{
int i, error = 0;
fbcon_has_sysfs = 1;
for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
error = device_create_file(fbcon_device, &device_attrs[i]);
if (error)
break;
}
if (error) {
while (--i >= 0)
device_remove_file(fbcon_device, &device_attrs[i]);
fbcon_has_sysfs = 0;
}
return 0;
}
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
static void fbcon_register_existing_fbs(struct work_struct *work)
{
int i;
console_lock();
for_each_registered_fb(i)
fbcon_fb_registered(registered_fb[i]);
console_unlock();
}
static struct notifier_block fbcon_output_nb;
static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
static int fbcon_output_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
WARN_CONSOLE_UNLOCKED();
pr_info("fbcon: Taking over console\n");
dummycon_unregister_output_notifier(&fbcon_output_nb);
deferred_takeover = false;
logo_shown = FBCON_LOGO_DONTSHOW;
/* We may get called in atomic context */
schedule_work(&fbcon_deferred_takeover_work);
return NOTIFY_OK;
}
#endif
static void fbcon_start(void)
{
WARN_CONSOLE_UNLOCKED();
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
if (conswitchp != &dummy_con)
deferred_takeover = false;
if (deferred_takeover) {
fbcon_output_nb.notifier_call = fbcon_output_notifier;
dummycon_register_output_notifier(&fbcon_output_nb);
return;
}
#endif
if (num_registered_fb) {
int i;
for_each_registered_fb(i) {
info_idx = i;
break;
}
do_fbcon_takeover(0);
}
}
static void fbcon_exit(void)
{
struct fb_info *info;
int i, j, mapped;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
if (deferred_takeover) {
dummycon_unregister_output_notifier(&fbcon_output_nb);
deferred_takeover = false;
}
#endif
for_each_registered_fb(i) {
int pending = 0;
mapped = 0;
info = registered_fb[i];
if (info->queue.func)
pending = cancel_work_sync(&info->queue);
DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
"no"));
for (j = first_fb_vc; j <= last_fb_vc; j++) {
if (con2fb_map[j] == i) {
mapped = 1;
con2fb_map[j] = -1;
}
}
if (mapped) {
if (info->fbops->fb_release)
info->fbops->fb_release(info, 0);
module_put(info->fbops->owner);
if (info->fbcon_par) {
struct fbcon_ops *ops = info->fbcon_par;
fbcon_del_cursor_timer(info);
kfree(ops->cursor_src);
kfree(ops->cursor_state.mask);
kfree(info->fbcon_par);
info->fbcon_par = NULL;
}
if (info->queue.func == fb_flashcursor)
info->queue.func = NULL;
}
}
}
void __init fb_console_init(void)
{
int i;
console_lock();
fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
"fbcon");
if (IS_ERR(fbcon_device)) {
printk(KERN_WARNING "Unable to create device "
"for fbcon; errno = %ld\n",
PTR_ERR(fbcon_device));
fbcon_device = NULL;
} else
fbcon_init_device();
for (i = 0; i < MAX_NR_CONSOLES; i++)
con2fb_map[i] = -1;
fbcon_start();
console_unlock();
}
#ifdef MODULE
static void __exit fbcon_deinit_device(void)
{
int i;
if (fbcon_has_sysfs) {
for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
device_remove_file(fbcon_device, &device_attrs[i]);
fbcon_has_sysfs = 0;
}
}
void __exit fb_console_exit(void)
{
console_lock();
fbcon_deinit_device();
device_destroy(fb_class, MKDEV(0, 0));
fbcon_exit();
do_unregister_con_driver(&fb_con);
console_unlock();
}
#endif
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