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vgacon: clean up global screen_info instances

Browse Source 
To prepare for completely separating the VGA console screen_info from
the one used in EFI/sysfb, rename the vgacon instances and make them
local as much as possible.

ia64 and arm both have confurations with vgacon and efi, but the contents
never overlaps because ia64 has no EFI framebuffer, and arm only has
vga console on legacy platforms without EFI. Renaming these is required
before the EFI screen_info can be moved into drivers/firmware.

The ia64 vga console is actually registered in two places from
setup_arch(), but one of them is wrong, so drop the one in pcdp.c and
fix the one in setup.c to use the correct conditional.

x86 has to keep them together, as the boot protocol is used to switch
between VGA text console and framebuffer through the screen_info data.

Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Khalid Aziz <khalid@gonehiking.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231009211845.3136536-7-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2023-10-09 23:18:42 +02:00 committed by Greg Kroah-Hartman
parent acfc788233
commit 555624c0d1
13 changed files with 74 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/alpha/kernel/proto.h
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@ -1,5 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/interrupt.h>
#include <linux/screen_info.h>
#include <linux/io.h>
/* Prototypes of functions used across modules here in this directory. */
@ -113,6 +114,7 @@ extern int boot_cpuid;
#ifdef CONFIG_VERBOSE_MCHECK
extern unsigned long alpha_verbose_mcheck;
#endif
extern struct screen_info vgacon_screen_info;
/* srmcons.c */
#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_SRM)

6
arch/alpha/kernel/setup.c
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@ -138,7 +138,7 @@ static char __initdata command_line[COMMAND_LINE_SIZE];
* code think we're on a VGA color display.
*/
struct screen_info screen_info = {
struct screen_info vgacon_screen_info = {
.orig_x = 0,
.orig_y = 25,
.orig_video_cols = 80,
@ -146,8 +146,6 @@ struct screen_info screen_info = {
.orig_video_isVGA = 1,
.orig_video_points = 16
};
EXPORT_SYMBOL(screen_info);
#endif
/*
@ -654,7 +652,7 @@ setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
vgacon_register_screen(&screen_info);
vgacon_register_screen(&vgacon_screen_info);
#endif
#endif

6
arch/alpha/kernel/sys_sio.c
View File

@ -60,9 +60,9 @@ alphabook1_init_arch(void)
#ifdef CONFIG_VGA_CONSOLE
/* The AlphaBook1 has LCD video fixed at 800x600,
37 rows and 100 cols. */
screen_info.orig_y = 37;
screen_info.orig_video_cols = 100;
screen_info.orig_video_lines = 37;
vgacon_screen_info.orig_y = 37;
vgacon_screen_info.orig_video_cols = 100;
vgacon_screen_info.orig_video_lines = 37;
#endif
lca_init_arch();

5
arch/arm/include/asm/setup.h
View File

@ -11,6 +11,7 @@
#ifndef __ASMARM_SETUP_H
#define __ASMARM_SETUP_H
#include <linux/screen_info.h>
#include <uapi/asm/setup.h>
@ -35,4 +36,8 @@ void early_mm_init(const struct machine_desc *);
void adjust_lowmem_bounds(void);
void setup_dma_zone(const struct machine_desc *desc);
#ifdef CONFIG_VGA_CONSOLE
extern struct screen_info vgacon_screen_info;
#endif
#endif

18
arch/arm/kernel/atags_parse.c
View File

@ -72,15 +72,15 @@ __tagtable(ATAG_MEM, parse_tag_mem32);
#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_VGA_CONSOLE)
static int __init parse_tag_videotext(const struct tag *tag)
{
screen_info.orig_x = tag->u.videotext.x;
screen_info.orig_y = tag->u.videotext.y;
screen_info.orig_video_page = tag->u.videotext.video_page;
screen_info.orig_video_mode = tag->u.videotext.video_mode;
screen_info.orig_video_cols = tag->u.videotext.video_cols;
screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
screen_info.orig_video_lines = tag->u.videotext.video_lines;
screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
screen_info.orig_video_points = tag->u.videotext.video_points;
vgacon_screen_info.orig_x = tag->u.videotext.x;
vgacon_screen_info.orig_y = tag->u.videotext.y;
vgacon_screen_info.orig_video_page = tag->u.videotext.video_page;
vgacon_screen_info.orig_video_mode = tag->u.videotext.video_mode;
vgacon_screen_info.orig_video_cols = tag->u.videotext.video_cols;
vgacon_screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
vgacon_screen_info.orig_video_lines = tag->u.videotext.video_lines;
vgacon_screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
vgacon_screen_info.orig_video_points = tag->u.videotext.video_points;
return 0;
}

6
arch/arm/kernel/efi.c
View File

@ -123,12 +123,6 @@ void __init arm_efi_init(void)
{
efi_init();
if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) {
/* dummycon on ARM needs non-zero values for columns/lines */
screen_info.orig_video_cols = 80;
screen_info.orig_video_lines = 25;
}
/* ARM does not permit early mappings to persist across paging_init() */
efi_memmap_unmap();

6
arch/arm/kernel/setup.c
View File

@ -928,8 +928,8 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
request_resource(&ioport_resource, &lp2);
}
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_EFI)
struct screen_info screen_info = {
#if defined(CONFIG_VGA_CONSOLE)
static struct screen_info vgacon_screen_info = {
.orig_video_lines = 30,
.orig_video_cols = 80,
.orig_video_mode = 0,
@ -1192,7 +1192,7 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
vgacon_register_screen(&screen_info);
vgacon_register_screen(&vgacon_screen_info);
#endif
#endif

49
arch/ia64/kernel/setup.c
View File

@ -86,7 +86,8 @@ EXPORT_SYMBOL(local_per_cpu_offset);
#endif
unsigned long ia64_cycles_per_usec;
struct ia64_boot_param *ia64_boot_param;
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_EFI)
#if defined(CONFIG_EFI)
/* No longer used on ia64, but needed for linking */
struct screen_info screen_info;
#endif
#ifdef CONFIG_VGA_CONSOLE
@ -503,8 +504,9 @@ screen_info_setup(void)
{
#ifdef CONFIG_VGA_CONSOLE
unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
static struct screen_info si;
memset(&screen_info, 0, sizeof(screen_info));
memset(&si, 0, sizeof(si));
if (!ia64_boot_param->console_info.num_rows ||
!ia64_boot_param->console_info.num_cols) {
@ -522,14 +524,26 @@ screen_info_setup(void)
font_height = 400 / num_rows;
}
screen_info.orig_x = orig_x;
screen_info.orig_y = orig_y;
screen_info.orig_video_cols = num_cols;
screen_info.orig_video_lines = num_rows;
screen_info.orig_video_points = font_height;
screen_info.orig_video_mode = 3; /* XXX fake */
screen_info.orig_video_isVGA = 1; /* XXX fake */
screen_info.orig_video_ega_bx = 3; /* XXX fake */
si.orig_x = orig_x;
si.orig_y = orig_y;
si.orig_video_cols = num_cols;
si.orig_video_lines = num_rows;
si.orig_video_points = font_height;
si.orig_video_mode = 3; /* XXX fake */
si.orig_video_isVGA = 1; /* XXX fake */
si.orig_video_ega_bx = 3; /* XXX fake */
if (!conswitchp) {
/*
* Non-legacy systems may route legacy VGA MMIO range to system
* memory. vga_con probes the MMIO hole, so memory looks like
* a VGA device to it. The EFI memory map can tell us if it's
* memory so we can avoid this problem.
*/
if (efi_mem_type(vga_console_membase + 0xA0000) !=
EFI_CONVENTIONAL_MEMORY) {
vgacon_register_screen(&si);
}
#endif
}
@ -609,21 +623,6 @@ setup_arch (char **cmdline_p)
cpu_init(); /* initialize the bootstrap CPU */
mmu_context_init(); /* initialize context_id bitmap */
#ifdef CONFIG_VT
if (!conswitchp) {
# if defined(CONFIG_VGA_CONSOLE)
/*
* Non-legacy systems may route legacy VGA MMIO range to system
* memory. vga_con probes the MMIO hole, so memory looks like
* a VGA device to it. The EFI memory map can tell us if it's
* memory so we can avoid this problem.
*/
if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
vgacon_register_screen(&screen_info);
# endif
}
#endif
/* enable IA-64 Machine Check Abort Handling unless disabled */
if (!nomca)
ia64_mca_init();

11
arch/mips/kernel/setup.c
View File

@ -15,7 +15,6 @@
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/export.h>
#include <linux/screen_info.h>
#include <linux/memblock.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
@ -54,10 +53,6 @@ struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(cpu_data);
#ifdef CONFIG_VGA_CONSOLE
struct screen_info screen_info;
#endif
/*
* Setup information
*
@ -792,12 +787,6 @@ void __init setup_arch(char **cmdline_p)
if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
check_bugs64_early();
#if defined(CONFIG_VT)
#if defined(CONFIG_VGA_CONSOLE)
vgacon_register_screen(&screen_info);
#endif
#endif
arch_mem_init(cmdline_p);
dmi_setup();

4
arch/mips/mti-malta/malta-setup.c
View File

@ -161,7 +161,7 @@ static void __init pci_clock_check(void)
#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
static void __init screen_info_setup(void)
{
screen_info = (struct screen_info) {
static struct screen_info si = {
.orig_x = 0,
.orig_y = 25,
.ext_mem_k = 0,
@ -175,6 +175,8 @@ static void __init screen_info_setup(void)
.orig_video_isVGA = VIDEO_TYPE_VGAC,
.orig_video_points = 16
};
vgacon_register_screen(&si);
}
#endif

24
arch/mips/sibyte/swarm/setup.c
View File

@ -112,6 +112,19 @@ int update_persistent_clock64(struct timespec64 now)
}
}
#ifdef CONFIG_VGA_CONSOLE
static struct screen_info vgacon_screen_info = {
.orig_video_page = 52,
.orig_video_mode = 3,
.orig_video_cols = 80,
.flags = 12,
.orig_video_ega_bx = 3,
.orig_video_lines = 25,
.orig_video_isVGA = 0x22,
.orig_video_points = 16,
};
#endif
void __init plat_mem_setup(void)
{
#ifdef CONFIG_SIBYTE_BCM1x80
@ -130,16 +143,7 @@ void __init plat_mem_setup(void)
swarm_rtc_type = RTC_M41T81;
#ifdef CONFIG_VGA_CONSOLE
screen_info = (struct screen_info) {
.orig_video_page = 52,
.orig_video_mode = 3,
.orig_video_cols = 80,
.flags = 12,
.orig_video_ega_bx = 3,
.orig_video_lines = 25,
.orig_video_isVGA = 0x22,
.orig_video_points = 16,
};
vgacon_register_screen(&vgacon_screen_info);
/* XXXKW for CFE, get lines/cols from environment */
#endif
}

16
arch/mips/sni/setup.c
View File

@ -39,18 +39,20 @@ extern void sni_machine_power_off(void);
static void __init sni_display_setup(void)
{
#if defined(CONFIG_VGA_CONSOLE) && defined(CONFIG_FW_ARC)
struct screen_info *si = &screen_info;
static struct screen_info si;
DISPLAY_STATUS *di;
di = ArcGetDisplayStatus(1);
if (di) {
si->orig_x = di->CursorXPosition;
si->orig_y = di->CursorYPosition;
si->orig_video_cols = di->CursorMaxXPosition;
si->orig_video_lines = di->CursorMaxYPosition;
si->orig_video_isVGA = VIDEO_TYPE_VGAC;
si->orig_video_points = 16;
si.orig_x = di->CursorXPosition;
si.orig_y = di->CursorYPosition;
si.orig_video_cols = di->CursorMaxXPosition;
si.orig_video_lines = di->CursorMaxYPosition;
si.orig_video_isVGA = VIDEO_TYPE_VGAC;
si.orig_video_points = 16;
vgacon_register_screen(&si);
}
#endif
}

1
drivers/firmware/pcdp.c
View File

@ -72,7 +72,6 @@ setup_vga_console(struct pcdp_device *dev)
return -ENODEV;
}
vgacon_register_screen(&screen_info);
printk(KERN_INFO "PCDP: VGA console\n");
return 0;
#else