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authorOpenmoko anonymizer key <devel@lists.openmoko.org>2007-09-02 22:14:36 +0000
committerOpenmoko anonymizer key <devel@lists.openmoko.org>2007-09-02 22:14:36 +0000
commitc1cfc8256ffcde3d0afd4de42b6f36b715c60dcb (patch)
treedbd86d9a8c2879937d1b40602fc97597470329e6 /packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch
parent98081bc36be3bb72de6ff3e57bc1a713fb453879 (diff)
parent31d144ff07c336393c2bc55ee5e486e17ee0bcfb (diff)
merge of '761183d571c60b5df965993faf1c23d3f933718b'
and 'd52a54d5f2ae378fe03f9c8d4cfb66d2d6a45d41'
Diffstat (limited to 'packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch')
-rw-r--r--packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch3141
1 files changed, 3141 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch b/packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch
new file mode 100644
index 0000000000..b1b0fc3549
--- /dev/null
+++ b/packages/linux/linux-rp-2.6.22/vesafb-tng-1.0-rc2-2.6.20-rc2.patch
@@ -0,0 +1,3141 @@
+diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
+index ee277dd..93d6e6e 100644
+--- a/Documentation/fb/vesafb.txt
++++ b/Documentation/fb/vesafb.txt
+@@ -2,16 +2,18 @@
+ What is vesafb?
+ ===============
+
+-This is a generic driver for a graphic framebuffer on intel boxes.
++Vesafb is a generic framebuffer driver for x86 and x86_64 boxes.
+
+-The idea is simple: Turn on graphics mode at boot time with the help
+-of the BIOS, and use this as framebuffer device /dev/fb0, like the m68k
+-(and other) ports do.
++VESA BIOS Extensions Version 2.0 are required, because we need access to
++a linear frame buffer. VBE 3.0 is required if you want to use modes with a
++higher (than the standard 60 Hz) refresh rate.
+
+-This means we decide at boot time whenever we want to run in text or
+-graphics mode. Switching mode later on (in protected mode) is
+-impossible; BIOS calls work in real mode only. VESA BIOS Extensions
+-Version 2.0 are required, because we need a linear frame buffer.
++The VESA framebuffer driver comes in two flavors - the standard 'vesafb'
++and 'vesafb-tng'. Vesafb-tng is available only on 32-bit x86 due to the
++technology it uses (vm86). Vesafb-tng has more features than vesafb
++(adjusting the refresh rate on VBE 3.0 compliant boards, switching the
++video mode without rebooting, selecting a mode by providing its
++modedb name, and more).
+
+ Advantages:
+
+@@ -29,26 +31,35 @@ Disadvantages:
+ How to use it?
+ ==============
+
+-Switching modes is done using the vga=... boot parameter. Read
+-Documentation/svga.txt for details.
++If you are running a 32-bit x86 system and you decide to use vesafb-tng,
++you can either compile the driver into the kernel or use it as a module.
++The graphics mode you want to use is in both cases specified using the
++standard modedb format.
+
+-You should compile in both vgacon (for text mode) and vesafb (for
+-graphics mode). Which of them takes over the console depends on
+-whenever the specified mode is text or graphics.
++If your system doesn't support vm86 calls, things get a little more tricky.
++Since on such systems you can't do BIOS calls from protected mode in which
++kernel runs, you have to decide at boot time whenever you want to run in text
++or in graphics mode. Switching mode later on is impossible. Switching modes
++is done using the vga=... boot parameter. Read Documentation/svga.txt for
++details. Below is a more detailed description of what to do on systems using
++the standard vesafb driver.
+
+-The graphic modes are NOT in the list which you get if you boot with
+-vga=ask and hit return. The mode you wish to use is derived from the
+-VESA mode number. Here are those VESA mode numbers:
++You should compile in both vgacon (for text mode) and vesafb (for graphics
++mode). Which of them takes over the console depends on whenever the
++specified mode is text or graphics.
++
++The graphic modes are NOT in the list which you get if you boot with vga=ask
++and hit return. The mode you wish to use is derived from the VESA mode number.
++Here are those VESA mode numbers:
+
+ | 640x480 800x600 1024x768 1280x1024
+ ----+-------------------------------------
+-256 | 0x101 0x103 0x105 0x107
+-32k | 0x110 0x113 0x116 0x119
+-64k | 0x111 0x114 0x117 0x11A
+-16M | 0x112 0x115 0x118 0x11B
++256 | 0x101 0x103 0x105 0x107
++32k | 0x110 0x113 0x116 0x119
++64k | 0x111 0x114 0x117 0x11A
++16M | 0x112 0x115 0x118 0x11B
+
+-The video mode number of the Linux kernel is the VESA mode number plus
+-0x200.
++The video mode number of the Linux kernel is the VESA mode number plus 0x200.
+
+ Linux_kernel_mode_number = VESA_mode_number + 0x200
+
+@@ -56,15 +67,15 @@ So the table for the Kernel mode numbers are:
+
+ | 640x480 800x600 1024x768 1280x1024
+ ----+-------------------------------------
+-256 | 0x301 0x303 0x305 0x307
+-32k | 0x310 0x313 0x316 0x319
+-64k | 0x311 0x314 0x317 0x31A
+-16M | 0x312 0x315 0x318 0x31B
++256 | 0x301 0x303 0x305 0x307
++32k | 0x310 0x313 0x316 0x319
++64k | 0x311 0x314 0x317 0x31A
++16M | 0x312 0x315 0x318 0x31B
+
+-To enable one of those modes you have to specify "vga=ask" in the
+-lilo.conf file and rerun LILO. Then you can type in the desired
+-mode at the "vga=ask" prompt. For example if you like to use
+-1024x768x256 colors you have to say "305" at this prompt.
++To enable one of those modes you have to specify "vga=ask" in the lilo.conf
++file and rerun LILO. Then you can type in the desired mode at the "vga=ask"
++prompt. For example if you like to use 1024x768x256 colors you have to say
++"305" at this prompt.
+
+ If this does not work, this might be because your BIOS does not support
+ linear framebuffers or because it does not support this mode at all.
+@@ -72,11 +83,12 @@ Even if your board does, it might be the BIOS which does not. VESA BIOS
+ Extensions v2.0 are required, 1.2 is NOT sufficient. You will get a
+ "bad mode number" message if something goes wrong.
+
+-1. Note: LILO cannot handle hex, for booting directly with
++1. Note: LILO cannot handle hex, for booting directly with
+ "vga=mode-number" you have to transform the numbers to decimal.
+ 2. Note: Some newer versions of LILO appear to work with those hex values,
+ if you set the 0x in front of the numbers.
+
++
+ X11
+ ===
+
+@@ -84,98 +96,164 @@ XF68_FBDev should work just fine, but it is non-accelerated. Running
+ another (accelerated) X-Server like XF86_SVGA might or might not work.
+ It depends on X-Server and graphics board.
+
+-The X-Server must restore the video mode correctly, else you end up
++The X-Server must restore the video mode correctly, or else you end up
+ with a broken console (and vesafb cannot do anything about this).
++With vesafb-tng chances are that the console will be restored properly
++even if the X server messes up the video mode.
+
+
+ Refresh rates
+ =============
+
+-There is no way to change the vesafb video mode and/or timings after
+-booting linux. If you are not happy with the 60 Hz refresh rate, you
+-have these options:
++With VBE 3.0 compatible BIOSes and vesafb-tng it is possible to change
++the refresh rate either at boot time (by specifying the @<rr> part of
++the mode name) or later, using the fbset utility.
++
++If you want to use the default BIOS refresh rate while switching modes
++on a running system, set pixclock to 0.
+
+- * configure and load the DOS-Tools for your the graphics board (if
+- available) and boot linux with loadlin.
+- * use a native driver (matroxfb/atyfb) instead if vesafb. If none
++With VBE 2.0 there is no way to change the mode timings after booting
++Linux. If you are not happy with the 60 Hz refresh rate, you have
++the following options:
++
++ * Configure and load the DOS tools for your the graphics board (if
++ available) and boot Linux with loadlin.
++ * Use a native driver (matroxfb/atyfb) instead of vesafb. If none
+ is available, write a new one!
+- * VBE 3.0 might work too. I have neither a gfx board with VBE 3.0
+- support nor the specs, so I have not checked this yet.
++ * Use a BIOS editor to change the default refresh rate (such an
++ editor does exist at least for ATI Radeon BIOSes).
++ * If you're running a non-vm86 and VBE 3.0 compatible system, you can
++ use a kernel patch (vesafb-rrc) to hard-code some mode timings in
++ the kernel and use these while setting the video mode at boot time.
++
++Note that there are some boards (nVidia 59**, 57** and newer models)
++claiming that their Video BIOS is VBE 3.0 compliant, while ignoring the
++CRTC values provided by software such as vesafb-tng. You'll not be able
++to adjust the refresh rate if you're using one of these boards.
+
+
+ Configuration
+ =============
+
+-The VESA BIOS provides protected mode interface for changing
+-some parameters. vesafb can use it for palette changes and
+-to pan the display. It is turned off by default because it
+-seems not to work with some BIOS versions, but there are options
+-to turn it on.
+-
+-You can pass options to vesafb using "video=vesafb:option" on
+-the kernel command line. Multiple options should be separated
+-by comma, like this: "video=vesafb:ypan,invers"
+-
+-Accepted options:
+-
+-invers no comment...
+-
+-ypan enable display panning using the VESA protected mode
+- interface. The visible screen is just a window of the
+- video memory, console scrolling is done by changing the
+- start of the window.
+- pro: * scrolling (fullscreen) is fast, because there is
+- no need to copy around data.
+- * You'll get scrollback (the Shift-PgUp thing),
+- the video memory can be used as scrollback buffer
+- kontra: * scrolling only parts of the screen causes some
+- ugly flicker effects (boot logo flickers for
+- example).
+-
+-ywrap Same as ypan, but assumes your gfx board can wrap-around
+- the video memory (i.e. starts reading from top if it
+- reaches the end of video memory). Faster than ypan.
+-
+-redraw scroll by redrawing the affected part of the screen, this
+- is the safe (and slow) default.
+-
+-
+-vgapal Use the standard vga registers for palette changes.
+- This is the default.
+-pmipal Use the protected mode interface for palette changes.
+-
+-mtrr:n setup memory type range registers for the vesafb framebuffer
+- where n:
+- 0 - disabled (equivalent to nomtrr) (default)
+- 1 - uncachable
+- 2 - write-back
+- 3 - write-combining
+- 4 - write-through
+-
+- If you see the following in dmesg, choose the type that matches the
+- old one. In this example, use "mtrr:2".
++The VESA BIOS provides protected mode interface for changing some parameters.
++vesafb can use it for palette changes and to pan the display. It is turned
++off by default because it seems not to work with some BIOS versions, but
++there are options to turn it on.
++
++You can pass options to vesafb using "video=vesafb:option" on the kernel
++command line. Multiple options should be separated by a comma, like this:
++"video=vesafb:ypan,1024x768-32@85"
++
++Note that vesafb-tng still uses the "video=vesafb:option" format of the
++kernel command line video parameter. "video=vesafb-tng:xxx" is incorrect.
++
++Accepted options (both vesafb and vesafb-tng):
++
++ypan Enable display panning using the VESA protected mode interface
++ The visible screen is just a window of the video memory,
++ console scrolling is done by changing the start of the window.
++ pro: * scrolling (fullscreen) is fast, because there is
++ no need to copy around data.
++ * you'll get scrollback (the Shift-PgUp thing),
++ the video memory can be used as scrollback buffer
++ con: * scrolling only parts of the screen causes some
++ ugly flicker effects (boot logo flickers for
++ example).
++
++ywrap Same as ypan, but assumes your gfx board can wrap-around the video
++ memory (i.e. starts reading from top if it reaches the end of
++ video memory). Faster than ypan.
++
++redraw Scroll by redrawing the affected part of the screen, this is the
++ safe (and slow) default.
++
++vgapal Use the standard VGA registers for palette changes.
++
++pmipal Use the protected mode interface for palette changes.
++ This is the default is the protected mode interface is available.
++
++mtrr:n Setup memory type range registers for the vesafb framebuffer
++ where n:
++ 0 - disabled (equivalent to nomtrr) (default)
++ 1 - uncachable
++ 2 - write-back
++ 3 - write-combining
++ 4 - write-through
++
++ If you see the following in dmesg, choose the type that matches
++ the old one. In this example, use "mtrr:2".
+ ...
+ mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
+ ...
+
+-nomtrr disable mtrr
++nomtrr Do not use memory type range registers for vesafb.
+
+ vremap:n
+ remap 'n' MiB of video RAM. If 0 or not specified, remap memory
+- according to video mode. (2.5.66 patch/idea by Antonino Daplas
+- reversed to give override possibility (allocate more fb memory
+- than the kernel would) to 2.4 by tmb@iki.fi)
++ according to video mode. (2.5.66 patch/idea by Antonino Daplas
++ reversed to give override possibility (allocate more fb memory
++ than the kernel would) to 2.4 by tmb@iki.fi)
+
+ vtotal:n
+ if the video BIOS of your card incorrectly determines the total
+ amount of video RAM, use this option to override the BIOS (in MiB).
+
+-Have fun!
++Options accepted only by vesafb-tng:
++
++<mode> The mode you want to set, in the standard modedb format. Refer to
++ modedb.txt for a detailed description. If you specify a mode that is
++ not supported by your board's BIOS, vesafb-tng will attempt to set a
++ similar mode. The list of supported modes can be found in
++ /proc/fbx/modes, where x is the framebuffer number (usually 0).
++ When vesafb-tng is compiled as a module, the mode string should be
++ provided as a value of the parameter 'mode'.
++
++vbemode:x
++ Force the use of VBE mode x. The mode will only be set if it's
++ found in the VBE-provided list of supported modes.
++ NOTE: The mode number 'x' should be specified in VESA mode number
++ notation, not the Linux kernel one (eg. 257 instead of 769).
++ HINT: If you use this option because normal <mode> parameter does
++ not work for you and you use a X server, you'll probably want to
++ set the 'nocrtc' option to ensure that the video mode is properly
++ restored after console <-> X switches.
++
++nocrtc Do not use CRTC timings while setting the video mode. This option
++ makes sence only with VBE 3.0 compliant systems. Use it if you have
++ problems with modes set in the standard way. Note that using this
++ option means that any refresh rate adjustments will be ignored
++ and the refresh rate will stay at your BIOS default (60 Hz).
++
++noedid Do not try to fetch and use EDID-provided modes.
++
++noblank Disable hardware blanking.
++
++gtf Force the use of VESA's GTF (Generalized Timing Formula). Specifying
++ this will cause vesafb to skip its internal modedb and EDID-modedb
++ and jump straight to the GTF part of the code (normally used only if
++ everything else failed). This can be useful if you want to get as
++ much as possible from your graphics board but your BIOS doesn't
++ support modes with the refresh rates you require. Note that you may
++ need to specify the maxhf, maxvf and maxclk parameters if they are not
++ provided by the EDID block.
++
++Additionally, the following parameters may be provided. They all override the
++EDID-provided values and BIOS defaults. Refer to your monitor's specs to get
++the correct values for maxhf, maxvf and maxclk for your hardware.
++
++maxhf:n Maximum horizontal frequency (in kHz).
++maxvf:n Maximum vertical frequency (in Hz).
++maxclk:n Maximum pixel clock (in MHz).
+
+- Gerd
++Have fun!
+
+ --
++Original document for the vesafb driver by
+ Gerd Knorr <kraxel@goldbach.in-berlin.de>
+
+-Minor (mostly typo) changes
+-by Nico Schmoigl <schmoigl@rumms.uni-mannheim.de>
++Minor (mostly typo) changes by
++Nico Schmoigl <schmoigl@rumms.uni-mannheim.de>
++
++Extended documentation for vm86, VBE 3.0 and vesafb-tng by
++Michal Januszewski <spock@gentoo.org>
++
+diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
+index 2c5b5cc..2c2d4b5 100644
+--- a/arch/i386/boot/video.S
++++ b/arch/i386/boot/video.S
+@@ -163,10 +163,12 @@ basret: ret
+ # parameters in the default 80x25 mode -- these are set directly,
+ # because some very obscure BIOSes supply insane values.
+ mode_params:
++#ifdef CONFIG_FB_VESA_STD
+ #ifdef CONFIG_VIDEO_SELECT
+ cmpb $0, graphic_mode
+ jnz mopar_gr
+ #endif
++#endif
+ movb $0x03, %ah # Read cursor position
+ xorb %bh, %bh
+ int $0x10
+@@ -199,6 +201,7 @@ mopar2: movb %al, %fs:(PARAM_VIDEO_LINES)
+ ret
+
+ #ifdef CONFIG_VIDEO_SELECT
++#ifdef CONFIG_FB_VESA_STD
+ # Fetching of VESA frame buffer parameters
+ mopar_gr:
+ leaw modelist+1024, %di
+@@ -281,6 +284,7 @@ dac_done:
+ movw %es, %fs:(PARAM_VESAPM_SEG)
+ movw %di, %fs:(PARAM_VESAPM_OFF)
+ no_pm: ret
++#endif
+
+ # The video mode menu
+ mode_menu:
+@@ -495,10 +499,12 @@ mode_set:
+
+ cmpb $VIDEO_FIRST_V7>>8, %ah
+ jz setv7
+-
++
++#ifdef CONFIG_FB_VESA_STD
+ cmpb $VIDEO_FIRST_VESA>>8, %ah
+ jnc check_vesa
+-
++#endif
++
+ orb %ah, %ah
+ jz setmenu
+
+@@ -570,6 +576,7 @@ setr1: lodsw
+ movw -4(%si), %ax # Fetch mode ID
+ jmp _m_s
+
++#ifdef CONFIG_FB_VESA_STD
+ check_vesa:
+ leaw modelist+1024, %di
+ subb $VIDEO_FIRST_VESA>>8, %bh
+@@ -603,6 +610,7 @@ check_vesa:
+ ret
+
+ _setbad: jmp setbad # Ugly...
++#endif
+
+ # Recalculate vertical display end registers -- this fixes various
+ # inconsistencies of extended modes on many adapters. Called when
+diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
+index 1393523..8a05f95 100644
+--- a/drivers/char/sysrq.c
++++ b/drivers/char/sysrq.c
+@@ -240,7 +240,7 @@ static void send_sig_all(int sig)
+ struct task_struct *p;
+
+ for_each_process(p) {
+- if (p->mm && !is_init(p))
++ if (p->mm && !is_init(p) && !(p->flags & PF_BORROWED_MM))
+ /* Not swapper, init nor kernel thread */
+ force_sig(sig, p);
+ }
+diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
+index 4e83f01..ae122fd 100644
+--- a/drivers/video/Kconfig
++++ b/drivers/video/Kconfig
+@@ -547,8 +547,22 @@ config FB_TGA
+ cards. Say Y if you have one of those.
+
+ config FB_VESA
+- bool "VESA VGA graphics support"
+- depends on (FB = y) && X86
++ tristate "VESA VGA graphics support"
++ depends on (FB = y) && (X86 || X86_64)
++ help
++ This is the frame buffer device driver for generic VESA 2.0
++ compliant graphic cards. The older VESA 1.2 cards are not supported.
++ You will get a boot time penguin logo at no additional cost. Please
++ read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
++
++choice
++ prompt "VESA driver type"
++ depends on FB_VESA
++ default FB_VESA_STD if X86_64
++ default FB_VESA_TNG if X86
++
++config FB_VESA_STD
++ bool "vesafb"
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+@@ -557,7 +571,43 @@ config FB_VESA
+ This is the frame buffer device driver for generic VESA 2.0
+ compliant graphic cards. The older VESA 1.2 cards are not supported.
+ You will get a boot time penguin logo at no additional cost. Please
+- read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
++ read <file:Documentation/fb/vesafb.txt>. Choose this driver if you
++ are experiencing problems with vesafb-tng or if you own a 64-bit system.
++
++ Note that this driver cannot be compiled as a module.
++
++config FB_VESA_TNG
++ bool "vesafb-tng"
++ depends on !X86_64
++ select FB_MODE_HELPERS
++ select FB_CFB_FILLRECT
++ select FB_CFB_COPYAREA
++ select FB_CFB_IMAGEBLIT
++ help
++ This is an enhanced generic frame buffer device driver for
++ VBE 2.0 compliant graphic cards. It can take advantage of VBE 3.0
++ features (refresh rate adjustment) when these are available.
++ The driver also makes it possible to change the video mode
++ on the fly and to switch back to text mode when it's unloaded.
++
++ If the driver is compiled as a module, the module will be called
++ vesafb-tng.
++
++endchoice
++
++config FB_VESA_DEFAULT_MODE
++ string "VESA default mode"
++ depends on FB_VESA_TNG
++ default "640x480@60"
++ help
++ This option is used to determine the default mode vesafb is
++ supposed to switch to in case no mode is provided as a kernel
++ command line parameter.
++
++config VIDEO_SELECT
++ bool
++ depends on FB_VESA
++ default y
+
+ config FB_IMAC
+ bool "Intel-based Macintosh Framebuffer Support"
+diff --git a/drivers/video/Makefile b/drivers/video/Makefile
+index 309a26d..e57b0e7 100644
+--- a/drivers/video/Makefile
++++ b/drivers/video/Makefile
+@@ -102,7 +102,11 @@ obj-$(CONFIG_FB_PNX4008_DUM_RGB) += pnx4008/
+ obj-$(CONFIG_FB_IBM_GXT4500) += gxt4500.o
+
+ # Platform or fallback drivers go here
+-obj-$(CONFIG_FB_VESA) += vesafb.o
++ifeq ($(CONFIG_FB_VESA_STD),y)
++ obj-y += vesafb.o
++else
++ obj-$(CONFIG_FB_VESA) += vesafb-thread.o vesafb-tng.o
++endif
+ obj-$(CONFIG_FB_IMAC) += imacfb.o
+ obj-$(CONFIG_FB_VGA16) += vga16fb.o vgastate.o
+ obj-$(CONFIG_FB_OF) += offb.o
+diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
+index 3cfea31..bfb39cc 100644
+--- a/drivers/video/fbmem.c
++++ b/drivers/video/fbmem.c
+@@ -1408,6 +1408,7 @@ fbmem_init(void)
+ printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
+ fb_class = NULL;
+ }
++
+ return 0;
+ }
+
+diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
+index 5df41f6..f838a53 100644
+--- a/drivers/video/modedb.c
++++ b/drivers/video/modedb.c
+@@ -674,6 +674,7 @@ void fb_var_to_videomode(struct fb_videomode *mode,
+ {
+ u32 pixclock, hfreq, htotal, vtotal;
+
++ mode->refresh = 0;
+ mode->name = NULL;
+ mode->xres = var->xres;
+ mode->yres = var->yres;
+@@ -1025,3 +1026,4 @@ EXPORT_SYMBOL(fb_find_best_mode);
+ EXPORT_SYMBOL(fb_find_nearest_mode);
+ EXPORT_SYMBOL(fb_videomode_to_modelist);
+ EXPORT_SYMBOL(fb_find_mode);
++EXPORT_SYMBOL(fb_destroy_modelist);
+diff --git a/drivers/video/vesafb-thread.c b/drivers/video/vesafb-thread.c
+new file mode 100644
+index 0000000..543e202
+--- /dev/null
++++ b/drivers/video/vesafb-thread.c
+@@ -0,0 +1,751 @@
++/*
++ * Framebuffer driver for VBE 2.0+ compliant graphic boards.
++ * Kernel thread and vm86 routines.
++ *
++ * (c) 2004-2006 Michal Januszewski <spock@gentoo.org>
++ *
++ */
++
++#include <linux/workqueue.h>
++#include <linux/completion.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/signal.h>
++#include <linux/freezer.h>
++#include <linux/suspend.h>
++#include <linux/unistd.h>
++#include <video/vesa.h>
++#include <video/edid.h>
++#include <asm/mman.h>
++#include <asm/page.h>
++#include <asm/vm86.h>
++#include <asm/thread_info.h>
++#include <asm/uaccess.h>
++#include <asm/mmu_context.h>
++#include "edid.h"
++
++static int errno;
++
++static DECLARE_COMPLETION(vesafb_th_completion);
++static DECLARE_MUTEX(vesafb_task_list_sem);
++static LIST_HEAD(vesafb_task_list);
++static DECLARE_WAIT_QUEUE_HEAD(vesafb_wait);
++
++static struct vm86_struct vm86;
++static int vesafb_pid = 0;
++
++#define DEFAULT_VM86_FLAGS (IF_MASK | IOPL_MASK)
++#define VM86_PUSHW(x) \
++do { \
++ vm86.regs.esp -= 2; \
++ *(u16*)(STACK_ADDR + vm86.regs.esp) = x; \
++} while(0);
++
++/* Stack, the return code and buffers will be put into
++ * one contiguous memory chunk:
++ *
++ * [ STACK | RET_CODE | BUFFER ]
++ *
++ * Some video BIOSes (sis6326) try to store data somewhere
++ * in 0x7000-0x7fff, so we zeromap more memory to be safe.
++ */
++#define IVTBDA_SIZE PAGE_SIZE
++#define RET_CODE_SIZE 0x0010
++#define STACK_SIZE 0x0500
++#define BUFFER_SIZE 0x10000
++
++/* The amount of memory that will be allocated should be a multiple
++ * of PAGE_SIZE. */
++#define __MEM_SIZE (RET_CODE_SIZE + STACK_SIZE + BUFFER_SIZE)
++#define REAL_MEM_SIZE (((__MEM_SIZE / PAGE_SIZE) + 1) * PAGE_SIZE)
++
++#define IVTBDA_ADDR 0x00000
++#define STACK_ADDR (IVTBDA_ADDR + IVTBDA_SIZE)
++#define RET_CODE_ADDR (STACK_ADDR + STACK_SIZE)
++#define BUF_ADDR (RET_CODE_ADDR + RET_CODE_SIZE)
++
++#define FLAG_D (1 << 10)
++
++/* Syscalls used by the vesafb thread */
++static int vm86old(struct vm86_struct __user* v86)
++{
++ long res;
++ __asm__ volatile ("push %%ebx; movl %2, %%ebx ; int $0x80 ; pop %%ebx"
++ : "=a" (res)
++ : "0" (__NR_vm86old), "ri" ((long)(v86)) : "memory");
++
++ if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) {
++ errno = -res;
++ res = -1;
++ }
++ return (int)res;
++}
++
++static int ioperm(unsigned long a, unsigned long b, unsigned long c)
++{
++ long res;
++ __asm__ volatile ("push %%ebx; movl %2, %%ebx ; int $0x80 ; pop %%ebx"
++ : "=a" (res)
++ : "0" (__NR_ioperm), "ri" ((long)(a)), "c" ((long)(b)),
++ "d" ((long)(c)) : "memory");
++
++ if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) {
++ errno = -res;
++ res = -1;
++ }
++ return (int)res;
++}
++
++/* Segment prefix opcodes */
++enum {
++ P_CS = 0x2e,
++ P_SS = 0x36,
++ P_DS = 0x3e,
++ P_ES = 0x26,
++ P_FS = 0x64,
++ P_GS = 0x65
++};
++
++/* Emulated vm86 ins instruction */
++static void vm86_ins(int size)
++{
++ u32 edx, edi;
++ edx = vm86.regs.edx & 0xffff;
++ edi = (vm86.regs.edi & 0xffff) + (u32)(vm86.regs.es << 4);
++
++ if (vm86.regs.eflags & FLAG_D)
++ asm volatile ("std\n");
++ else
++ asm volatile ("cld\n");
++
++ switch (size) {
++ case 4:
++ asm volatile ("insl\n" : "=D" (edi) : "d" (edx), "0" (edi));
++ break;
++ case 2:
++ asm volatile ("insw\n" : "=D" (edi) : "d" (edx), "0" (edi));
++ break;
++ case 1:
++ asm volatile ("insb\n" : "=D" (edi) : "d" (edx), "0" (edi));
++ break;
++ }
++
++ if (vm86.regs.eflags & FLAG_D)
++ asm volatile ("cld\n");
++
++ edi -= (u32)(vm86.regs.es << 4);
++
++ vm86.regs.edi &= 0xffff0000;
++ vm86.regs.edi |= edi & 0xffff;
++}
++
++static void vm86_rep_ins(int size)
++{
++ u16 cx = vm86.regs.ecx;
++ while (cx--)
++ vm86_ins(size);
++
++ vm86.regs.ecx &= 0xffff0000;
++}
++
++/* Emulated vm86 outs instruction */
++static void vm86_outs(int size, int segment)
++{
++ u32 edx, esi, base;
++
++ edx = vm86.regs.edx & 0xffff;
++ esi = vm86.regs.esi & 0xffff;
++
++ switch (segment) {
++ case P_CS: base = vm86.regs.cs; break;
++ case P_SS: base = vm86.regs.ss; break;
++ case P_ES: base = vm86.regs.es; break;
++ case P_FS: base = vm86.regs.fs; break;
++ case P_GS: base = vm86.regs.gs; break;
++ default: base = vm86.regs.ds; break;
++ }
++
++ esi += base << 4;
++
++ if (vm86.regs.eflags & FLAG_D)
++ asm volatile ("std\n");
++ else
++ asm volatile ("cld\n");
++
++ switch (size) {
++ case 4:
++ asm volatile ("outsl\n" : "=S" (esi) : "d" (edx), "0" (esi));
++ break;
++ case 2:
++ asm volatile ("outsw\n" : "=S" (esi) : "d" (edx), "0" (esi));
++ break;
++ case 1:
++ asm volatile ("outsb\n" : "=S" (esi) : "d" (edx), "0" (esi));
++ break;
++ }
++
++ if (vm86.regs.eflags & FLAG_D)
++ asm volatile ("cld");
++
++ esi -= base << 4;
++ vm86.regs.esi &= 0xffff0000;
++ vm86.regs.esi |= (esi & 0xffff);
++}
++
++static void vm86_rep_outs(int size, int segment)
++{
++ u16 cx = vm86.regs.ecx;
++ while (cx--)
++ vm86_outs(size, segment);
++
++ vm86.regs.ecx &= 0xffff0000;
++}
++
++static int vm86_do_unknown(void)
++{
++ u8 data32 = 0, segment = P_DS, rep = 0;
++ u8 *instr;
++ int ret = 0, i = 0;
++
++ instr = (u8*)((vm86.regs.cs << 4) + vm86.regs.eip);
++
++ while (1) {
++ switch(instr[i]) {
++ case 0x66: /* operand size prefix */
++ data32 = 1 - data32;
++ i++;
++ break;
++ case 0xf2: /* repnz */
++ case 0xf3: /* rep */
++ rep = 1;
++ i++;
++ break;
++ case P_CS: /* segment prefix */
++ case P_SS:
++ case P_DS:
++ case P_ES:
++ case P_FS:
++ case P_GS:
++ segment = instr[i];
++ i++;
++ break;
++ case 0xf0: /* LOCK - ignored */
++ case 0x67: /* address size prefix - ignored */
++ i++;
++ break;
++ case 0x6c: /* insb */
++ if (rep)
++ vm86_rep_ins(1);
++ else
++ vm86_ins(1);
++ i++;
++ goto out;
++ case 0x6d: /* insw / insd */
++ if (rep) {
++ if (data32)
++ vm86_rep_ins(4);
++ else
++ vm86_rep_ins(2);
++ } else {
++ if (data32)
++ vm86_ins(4);
++ else
++ vm86_ins(2);
++ }
++ i++;
++ goto out;
++ case 0x6e: /* outsb */
++ if (rep)
++ vm86_rep_outs(1, segment);
++ else
++ vm86_outs(1, segment);
++ i++;
++ goto out;
++ case 0x6f: /* outsw / outsd */
++ if (rep) {
++ if (data32)
++ vm86_rep_outs(4, segment);
++ else
++ vm86_rep_outs(2, segment);
++ } else {
++ if (data32)
++ vm86_outs(4, segment);
++ else
++ vm86_outs(2, segment);
++ }
++ i++;
++ goto out;
++ case 0xe4: /* inb xx */
++ asm volatile (
++ "inb %w1, %b0"
++ : "=a" (vm86.regs.eax)
++ : "d" (instr[i+1]), "0" (vm86.regs.eax));
++ i += 2;
++ goto out;
++ case 0xe5: /* inw xx / ind xx */
++ if (data32) {
++ asm volatile (
++ "inl %w1, %0"
++ : "=a" (vm86.regs.eax)
++ : "d" (instr[i+1]),
++ "0" (vm86.regs.eax));
++ } else {
++ asm volatile (
++ "inw %w1, %w0"
++ : "=a" (vm86.regs.eax)
++ : "d" (instr[i+1]),
++ "0" (vm86.regs.eax));
++ }
++ i += 2;
++ goto out;
++
++ case 0xec: /* inb dx */
++ asm volatile (
++ "inb %w1, %b0"
++ : "=a" (vm86.regs.eax)
++ : "d" (vm86.regs.edx), "0" (vm86.regs.eax));
++ i++;
++ goto out;
++ case 0xed: /* inw dx / ind dx */
++ if (data32) {
++ asm volatile (
++ "inl %w1, %0"
++ : "=a" (vm86.regs.eax)
++ : "d" (vm86.regs.edx));
++ } else {
++ asm volatile (
++ "inw %w1, %w0"
++ : "=a" (vm86.regs.eax)
++ : "d" (vm86.regs.edx));
++ }
++ i++;
++ goto out;
++ case 0xe6: /* outb xx */
++ asm volatile (
++ "outb %b0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax), "d" (instr[i+1]));
++ i += 2;
++ goto out;
++ case 0xe7: /* outw xx / outd xx */
++ if (data32) {
++ asm volatile (
++ "outl %0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax),
++ "d" (instr[i+1]));
++ } else {
++ asm volatile (
++ "outw %w0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax),
++ "d" (instr[i+1]));
++ }
++ i += 2;
++ goto out;
++ case 0xee: /* outb dx */
++ asm volatile (
++ "outb %b0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax), "d" (vm86.regs.edx));
++ i++;
++ goto out;
++ case 0xef: /* outw dx / outd dx */
++ if (data32) {
++ asm volatile (
++ "outl %0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax),
++ "d" (vm86.regs.edx));
++ } else {
++ asm volatile (
++ "outw %w0, %w1"
++ : /* no return value */
++ : "a" (vm86.regs.eax),
++ "d" (vm86.regs.edx));
++ }
++ i++;
++ goto out;
++ default:
++ printk(KERN_ERR "vesafb: BUG, opcode 0x%x emulation "
++ "not supported (EIP: 0x%lx)\n",
++ instr[i], (u32)(vm86.regs.cs << 4) +
++ vm86.regs.eip);
++ ret = 1;
++ goto out;
++ }
++ }
++out: vm86.regs.eip += i;
++ return ret;
++}
++
++void vesafb_do_vm86(struct vm86_regs *regs)
++{
++ unsigned int ret;
++ u8 *retcode = (void*)RET_CODE_ADDR;
++
++ memset(&vm86,0,sizeof(vm86));
++ memcpy(&vm86.regs, regs, sizeof(struct vm86_regs));
++
++ /* The return code */
++ retcode[0] = 0xcd; /* int opcode */
++ retcode[1] = 0xff; /* int number (255) */
++
++ /* We use int 0xff to get back to protected mode */
++ memset(&vm86.int_revectored, 0, sizeof(vm86.int_revectored));
++ ((unsigned char *)&vm86.int_revectored)[0xff / 8] |= (1 << (0xff % 8));
++
++ /*
++ * We want to call int 0x10, so we set:
++ * CS = 0x42 = 0x10 * 4 + 2
++ * IP = 0x40 = 0x10 * 4
++ * and SS:ESP. It's up to the caller to set the rest of the registers.
++ */
++ vm86.regs.eflags = DEFAULT_VM86_FLAGS;
++ vm86.regs.cs = *(unsigned short *)0x42;
++ vm86.regs.eip = *(unsigned short *)0x40;
++ vm86.regs.ss = (STACK_ADDR >> 4);
++ vm86.regs.esp = ((STACK_ADDR & 0x0000f) + STACK_SIZE);
++
++ /* These will be fetched off the stack when we come to an iret in the
++ * int's 0x10 code. */
++ VM86_PUSHW(DEFAULT_VM86_FLAGS);
++ VM86_PUSHW((RET_CODE_ADDR >> 4)); /* return code segment */
++ VM86_PUSHW((RET_CODE_ADDR & 0x0000f)); /* return code offset */
++
++ while(1) {
++ ret = vm86old(&vm86);
++
++ if (VM86_TYPE(ret) == VM86_INTx) {
++ int vint = VM86_ARG(ret);
++
++ /* If exit from vm86 was caused by int 0xff, then
++ * we're done.. */
++ if (vint == 0xff)
++ goto out;
++
++ /* .. otherwise, we have to call the int handler
++ * manually */
++ VM86_PUSHW(vm86.regs.eflags);
++ VM86_PUSHW(vm86.regs.cs);
++ VM86_PUSHW(vm86.regs.eip);
++
++ vm86.regs.cs = *(u16 *)((vint << 2) + 2);
++ vm86.regs.eip = *(u16 *)(vint << 2);
++ vm86.regs.eflags &= ~(VIF_MASK | TF_MASK);
++ } else if (VM86_TYPE(ret) == VM86_UNKNOWN) {
++ if (vm86_do_unknown())
++ goto out;
++ } else {
++ printk(KERN_ERR "vesafb: BUG, returned from "
++ "vm86 with %x (EIP: 0x%lx)\n",
++ ret, (u32)(vm86.regs.cs << 4) +
++ vm86.regs.eip);
++ goto out;
++ }
++ }
++
++out: /* copy the registers' state back to the caller's struct */
++ memcpy(regs, &vm86.regs, sizeof(struct vm86_regs));
++}
++
++static int vesafb_remap_pfn_range(unsigned long start, unsigned long end,
++ unsigned long pgoff, unsigned long prot,
++ int type)
++{
++ struct vm_area_struct *vma;
++ struct mm_struct *mm = current->mm;
++ int ret = 0;
++
++ vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
++ if (!vma)
++ return -ENOMEM;
++ memset(vma, 0, sizeof(*vma));
++ down_write(&mm->mmap_sem);
++ vma->vm_mm = mm;
++ vma->vm_start = start;
++ vma->vm_end = end;
++ vma->vm_flags = VM_READ | VM_WRITE | VM_EXEC;
++ vma->vm_flags |= mm->def_flags;
++ vma->vm_page_prot.pgprot = prot;
++ vma->vm_pgoff = pgoff;
++
++ if ((ret = insert_vm_struct(mm, vma))) {
++ up_write(&mm->mmap_sem);
++ kmem_cache_free(vm_area_cachep, vma);
++ return ret;
++ }
++
++ if (type) {
++ ret = zeromap_page_range(vma,
++ vma->vm_start,
++ vma->vm_end - vma->vm_start,
++ vma->vm_page_prot);
++ } else {
++ vma->vm_flags |= VM_SHARED;
++ ret = remap_pfn_range(vma,
++ vma->vm_start,
++ vma->vm_pgoff,
++ vma->vm_end - vma->vm_start,
++ vma->vm_page_prot);
++ }
++ up_write(&mm->mmap_sem);
++ return ret;
++}
++
++static inline int vesafb_init_mem(void)
++{
++ int ret = 0;
++
++ /* The memory chunks we're remapping here should be multiples
++ * of PAGE_SIZE. */
++ ret += vesafb_remap_pfn_range(0x00000, IVTBDA_SIZE, 0,
++ PROT_READ | PROT_EXEC | PROT_WRITE, 0);
++ ret += vesafb_remap_pfn_range(IVTBDA_SIZE, REAL_MEM_SIZE, 0,
++ PROT_READ | PROT_EXEC | PROT_WRITE, 1);
++ ret += vesafb_remap_pfn_range(0x9f000, 0x100000,
++ 0x9f000 >> PAGE_SHIFT,
++ PROT_READ | PROT_EXEC | PROT_WRITE, 0);
++ if (ret)
++ printk(KERN_ERR "vesafb thread: memory remapping failed\n");
++
++ return ret;
++}
++
++#define vesafb_get_string(str) \
++{ \
++ /* The address is in the form ssssoooo, where oooo = offset, \
++ * ssss = segment */ \
++ addr = ((p_vbe(tsk->buf)->str & 0xffff0000) >> 12) + \
++ (p_vbe(tsk->buf)->str & 0x0000ffff); \
++ \
++ /* The data is in ROM which is shared between processes, so we \
++ * just translate the real mode address into one visible from \
++ * kernel space */ \
++ if (addr >= 0xa0000) { \
++ p_vbe(tsk->buf)->str = (u32) __va(addr); \
++ \
++ /* The data is in the buffer, we just have to convert the \
++ * address so that it points into the buffer user provided. */ \
++ } else if (addr > BUF_ADDR && addr < BUF_ADDR + \
++ sizeof(struct vesafb_vbe_ib)) { \
++ addr -= BUF_ADDR; \
++ p_vbe(tsk->buf)->str = (u32) (tsk->buf + addr); \
++ \
++ /* This should never happen: someone was insane enough to put \
++ * the data somewhere in RAM.. */ \
++ } else { \
++ p_vbe(tsk->buf)->str = (u32) ""; \
++ } \
++}
++
++void vesafb_handle_getvbeib(struct vesafb_task *tsk)
++{
++ int addr, res;
++
++ tsk->regs.es = (BUF_ADDR >> 4);
++ tsk->regs.edi = (BUF_ADDR & 0x000f);
++ strncpy(p_vbe(BUF_ADDR)->vbe_signature, "VBE2", 4);
++
++ vesafb_do_vm86(&tsk->regs);
++ memcpy(tsk->buf, (void*)(BUF_ADDR), sizeof(struct vesafb_vbe_ib));
++
++ /* The OEM fields were not defined prior to VBE 2.0 */
++ if (p_vbe(tsk->buf)->vbe_version >= 0x200) {
++ vesafb_get_string(oem_string_ptr);
++ vesafb_get_string(oem_vendor_name_ptr);
++ vesafb_get_string(oem_product_name_ptr);
++ vesafb_get_string(oem_product_rev_ptr);
++ }
++
++ /* This is basically the same as vesafb_get_string() */
++ addr = ((p_vbe(tsk->buf)->mode_list_ptr & 0xffff0000) >> 12) +
++ (p_vbe(tsk->buf)->mode_list_ptr & 0x0000ffff);
++
++ if (addr >= 0xa0000) {
++ p_vbe(tsk->buf)->mode_list_ptr = (u32) __va(addr);
++ } else if (addr > BUF_ADDR && addr < BUF_ADDR +
++ sizeof(struct vesafb_vbe_ib)) {
++ addr -= BUF_ADDR;
++ p_vbe(tsk->buf)->mode_list_ptr = (u32) (tsk->buf + addr);
++ } else {
++ res = 0;
++ printk(KERN_WARNING "vesafb: warning, copying modelist "
++ "from somewhere in RAM!\n");
++ while (*(u16*)(addr+res) != 0xffff &&
++ res < (sizeof(p_vbe(tsk->buf)->reserved) - 2)) {
++ *(u16*) ((u32)&(p_vbe(tsk->buf)->reserved) + res) =
++ *(u16*)(addr+res);
++ res += 2;
++ }
++ *(u16*) ((u32)&(p_vbe(tsk->buf)->reserved) + res) = 0xffff;
++ }
++}
++
++int vesafb_handle_tasks(void)
++{
++ struct vesafb_task *tsk;
++ struct list_head *curr, *next;
++ int ret = 0;
++
++ down(&vesafb_task_list_sem);
++ list_for_each_safe(curr, next, &vesafb_task_list) {
++ tsk = list_entry(curr, struct vesafb_task, node);
++
++ if (tsk->flags & TF_EXIT) {
++ ret = 1;
++ goto task_done;
++ }
++ if (tsk->flags & TF_GETVBEIB) {
++ vesafb_handle_getvbeib(tsk);
++ goto task_done;
++ }
++ /* Do we need to store a pointer to the buffer in ES:EDI? */
++ if (tsk->flags & TF_BUF_DI) {
++ tsk->regs.es = (BUF_ADDR >> 4);
++ tsk->regs.edi = (BUF_ADDR & 0x000f);
++ }
++ /* Sometimes the pointer has to be in ES:EBX. */
++ if (tsk->flags & TF_BUF_BX) {
++ tsk->regs.es = (BUF_ADDR >> 4);
++ tsk->regs.ebx = (BUF_ADDR & 0x000f);
++ }
++ if (tsk->flags & (TF_BUF_DI | TF_BUF_BX))
++ memcpy((void*)BUF_ADDR, tsk->buf, tsk->buf_len);
++
++ vesafb_do_vm86(&tsk->regs);
++
++ if (tsk->flags & TF_RETURN_BUF)
++ memcpy(tsk->buf, (void*)BUF_ADDR, tsk->buf_len);
++
++task_done: list_del(curr);
++ complete(&tsk->done);
++ }
++
++ /* If we're going to kill this thread, don't allow any elements
++ * to be added to the task list. */
++ if (!ret)
++ up(&vesafb_task_list_sem);
++
++ return ret;
++}
++
++/*
++ * This 'hybrid' thread serves as a backend for vesafb-tng, handling all vm86
++ * calls. It is started as a kernel thread. It then creates its own mm struct,
++ * thus separating itself from any userspace processes. At this moment, it
++ * stops being a kernel thread (kernel threads have mm = NULL) and becomes
++ * a 'hybrid' thread -- one that has full access to kernel space, yet runs
++ * with its own address space.
++ *
++ * This is necessary because in order to make vm86 calls some parts of the
++ * first 1MB of RAM have to be setup to mimic the real mode. These are:
++ * - interrupt vector table [0x00000-0x003ff]
++ * - BIOS data area [0x00400-0x004ff]
++ * - Extended BIOS data area [0x9fc00-0x9ffff]
++ * - the video RAM [0xa0000-0xbffff]
++ * - video BIOS [0xc0000-0xcffff]
++ * - motherboard BIOS [0xf0000-0xfffff]
++ */
++int vesafb_thread(void *unused)
++{
++ int err = 0;
++
++ set_fs(KERNEL_DS);
++ daemonize("vesafb");
++
++ if (set_new_mm()) {
++ err = -ENOMEM;
++ goto thr_end;
++ }
++ if (vesafb_init_mem()) {
++ err = -ENOMEM;
++ goto thr_end;
++ }
++
++ DPRINTK("started vesafb thread\n");
++
++ /* Having an IO bitmap makes things faster as we avoid GPFs
++ * when running vm86 code. We can live if it fails, though,
++ * so don't bother checking for errors. */
++ ioperm(0,1024,1);
++ set_user_nice(current, -10);
++
++ complete(&vesafb_th_completion);
++
++ while (1) {
++ if (vesafb_handle_tasks())
++ break;
++ wait_event_interruptible(vesafb_wait,
++ !list_empty(&vesafb_task_list));
++ try_to_freeze();
++ }
++
++out: DPRINTK("exiting the vesafb thread\n");
++ vesafb_pid = -1;
++
++ /* Now that all callers know this thread is no longer running
++ * (pid < 0), allow them to continue. */
++ up(&vesafb_task_list_sem);
++ return err;
++thr_end:
++ down(&vesafb_task_list_sem);
++ complete(&vesafb_th_completion);
++ goto out;
++}
++
++int vesafb_queue_task(struct vesafb_task *tsk)
++{
++ down(&vesafb_task_list_sem);
++ if (vesafb_pid < 0)
++ return -1;
++ list_add_tail(&tsk->node, &vesafb_task_list);
++ up(&vesafb_task_list_sem);
++ wake_up(&vesafb_wait);
++ return 0;
++}
++
++int vesafb_wait_for_thread(void)
++{
++ /* PID 0 means that the thread is still initializing. */
++ if (vesafb_pid < 0)
++ return -1;
++ wait_for_completion(&vesafb_th_completion);
++ return 0;
++}
++
++int __init vesafb_init_thread(void)
++{
++ vesafb_pid = kernel_thread(vesafb_thread,NULL,0);
++ return 0;
++}
++
++#ifdef MODULE
++void __exit vesafb_kill_thread(void)
++{
++ struct vesafb_task *tsk;
++ if (vesafb_pid <= 0)
++ return;
++
++ vesafb_create_task(tsk);
++ if (!tsk)
++ return;
++ tsk->flags |= TF_EXIT;
++ vesafb_queue_task(tsk);
++ vesafb_wait_for_task(tsk);
++ kfree(tsk);
++ return;
++}
++module_exit(vesafb_kill_thread);
++#endif
++module_init(vesafb_init_thread);
++
++EXPORT_SYMBOL_GPL(vesafb_queue_task);
++EXPORT_SYMBOL_GPL(vesafb_wait_for_thread);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Michal Januszewski");
++
+diff --git a/drivers/video/vesafb-tng.c b/drivers/video/vesafb-tng.c
+new file mode 100644
+index 0000000..b4d4394
+--- /dev/null
++++ b/drivers/video/vesafb-tng.c
+@@ -0,0 +1,1586 @@
++/*
++ * Framebuffer driver for VBE 2.0+ compliant graphic boards
++ *
++ * (c) 2004-2006 Michal Januszewski <spock@gentoo.org>
++ * Based upon vesafb code by Gerd Knorr <kraxel@goldbach.in-berlin.de>
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/tty.h>
++#include <linux/delay.h>
++#include <linux/fb.h>
++#include <linux/ioport.h>
++#include <linux/init.h>
++#include <linux/proc_fs.h>
++#include <linux/completion.h>
++#include <linux/platform_device.h>
++#include <video/edid.h>
++#include <video/vesa.h>
++#include <video/vga.h>
++#include <asm/io.h>
++#include <asm/mtrr.h>
++#include <asm/page.h>
++#include <asm/pgtable.h>
++#include "edid.h"
++
++#define dac_reg (0x3c8)
++#define dac_val (0x3c9)
++
++#define VESAFB_NEED_EXACT_RES 1
++#define VESAFB_NEED_EXACT_DEPTH 2
++
++/* --------------------------------------------------------------------- */
++
++static struct fb_var_screeninfo vesafb_defined __initdata = {
++ .activate = FB_ACTIVATE_NOW,
++ .height = 0,
++ .width = 0,
++ .right_margin = 32,
++ .upper_margin = 16,
++ .lower_margin = 4,
++ .vsync_len = 4,
++ .vmode = FB_VMODE_NONINTERLACED,
++};
++
++static struct fb_fix_screeninfo vesafb_fix __initdata = {
++ .id = "VESA VGA",
++ .type = FB_TYPE_PACKED_PIXELS,
++ .accel = FB_ACCEL_NONE,
++};
++
++static int mtrr = 0; /* disable mtrr by default */
++static int blank = 1; /* enable blanking by default */
++static int ypan = 0; /* 0 - nothing, 1 - ypan, 2 - ywrap */
++static int pmi_setpal = 1; /* pmi for palette changes */
++static u16 *pmi_base = NULL; /* protected mode interface location */
++static void (*pmi_start)(void) = NULL;
++static void (*pmi_pal)(void) = NULL;
++static struct vesafb_vbe_ib vbe_ib;
++static struct vesafb_mode_ib *vbe_modes;
++static int vbe_modes_cnt = 0;
++static struct fb_info *vesafb_info = NULL;
++static int nocrtc = 0; /* ignore CRTC settings */
++static int noedid __initdata = 0; /* don't try DDC transfers */
++static int vram_remap __initdata = 0; /* set amount of memory to be used */
++static int vram_total __initdata = 0; /* set total amount of memory */
++static u16 maxclk __initdata = 0; /* maximum pixel clock */
++static u16 maxvf __initdata = 0; /* maximum vertical frequency */
++static u16 maxhf __initdata = 0; /* maximum horizontal frequency */
++static int gtf __initdata = 0; /* forces use of the GTF */
++static char *mode_option __initdata = NULL;
++static u16 vbemode __initdata = 0;
++
++/* --------------------------------------------------------------------- */
++
++static int vesafb_find_vbe_mode(int xres, int yres, int depth,
++ unsigned char flags)
++{
++ int i, match = -1, h = 0, d = 0x7fffffff;
++
++ for (i = 0; i < vbe_modes_cnt; i++) {
++ h = abs(vbe_modes[i].x_res - xres) +
++ abs(vbe_modes[i].y_res - yres) +
++ abs(depth - vbe_modes[i].depth);
++ if (h == 0)
++ return i;
++ if (h < d || (h == d && vbe_modes[i].depth > depth)) {
++ d = h;
++ match = i;
++ }
++ }
++ i = 1;
++
++ if (flags & VESAFB_NEED_EXACT_DEPTH && vbe_modes[match].depth != depth)
++ i = 0;
++ if (flags & VESAFB_NEED_EXACT_RES && d > 24)
++ i = 0;
++ if (i != 0)
++ return match;
++ else
++ return -1;
++}
++
++static int vesafb_pan_display(struct fb_var_screeninfo *var,
++ struct fb_info *info)
++{
++ int offset;
++
++ offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
++
++ /* It turns out it's not the best idea to do panning via vm86,
++ * so we only allow it if we have a PMI. */
++ if (pmi_start) {
++ __asm__ __volatile__(
++ "call *(%%edi)"
++ : /* no return value */
++ : "a" (0x4f07), /* EAX */
++ "b" (0), /* EBX */
++ "c" (offset), /* ECX */
++ "d" (offset >> 16), /* EDX */
++ "D" (&pmi_start)); /* EDI */
++ }
++ return 0;
++}
++
++static int vesafb_blank(int blank, struct fb_info *info)
++{
++ struct vesafb_task *tsk;
++ int err = 1;
++
++ if (vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
++ int loop = 10000;
++ u8 seq = 0, crtc17 = 0;
++
++ if (blank == FB_BLANK_POWERDOWN) {
++ seq = 0x20;
++ crtc17 = 0x00;
++ err = 0;
++ } else {
++ seq = 0x00;
++ crtc17 = 0x80;
++ err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
++ }
++
++ vga_wseq(NULL, 0x00, 0x01);
++ seq |= vga_rseq(NULL, 0x01) & ~0x20;
++ vga_wseq(NULL, 0x00, seq);
++
++ crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
++ while (loop--);
++ vga_wcrt(NULL, 0x17, crtc17);
++ vga_wseq(NULL, 0x00, 0x03);
++ } else {
++ vesafb_create_task (tsk);
++ if (!tsk)
++ return -ENOMEM;
++ tsk->regs.eax = 0x4f10;
++ switch (blank) {
++ case FB_BLANK_UNBLANK:
++ tsk->regs.ebx = 0x0001;
++ break;
++ case FB_BLANK_NORMAL:
++ tsk->regs.ebx = 0x0101; /* standby */
++ break;
++ case FB_BLANK_POWERDOWN:
++ tsk->regs.ebx = 0x0401; /* powerdown */
++ break;
++ default:
++ goto out;
++ }
++ tsk->flags = TF_CALL;
++ if (!vesafb_queue_task (tsk))
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) == 0x004f)
++ err = 0;
++out: kfree(tsk);
++ }
++ return err;
++}
++
++static int vesafb_setpalette(struct vesafb_pal_entry *entries, int count,
++ int start, struct fb_info *info)
++{
++ struct vesafb_task *tsk;
++ int i = ((struct vesafb_par*)info->par)->mode_idx;
++ int ret = 0;
++
++ /* We support palette modifications for 8 bpp modes only, so
++ * there can never be more than 256 entries. */
++ if (start + count > 256)
++ return -EINVAL;
++
++ /* Use VGA registers if mode is VGA-compatible. */
++ if (i >= 0 && i < vbe_modes_cnt &&
++ vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
++ for (i = 0; i < count; i++) {
++ outb_p(start + i, dac_reg);
++ outb_p(entries[i].red, dac_val);
++ outb_p(entries[i].green, dac_val);
++ outb_p(entries[i].blue, dac_val);
++ }
++ } else if (pmi_setpal) {
++ __asm__ __volatile__(
++ "call *(%%esi)"
++ : /* no return value */
++ : "a" (0x4f09), /* EAX */
++ "b" (0), /* EBX */
++ "c" (count), /* ECX */
++ "d" (start), /* EDX */
++ "D" (entries), /* EDI */
++ "S" (&pmi_pal)); /* ESI */
++ } else {
++ vesafb_create_task (tsk);
++ if (!tsk)
++ return -ENOMEM;
++ tsk->regs.eax = 0x4f09;
++ tsk->regs.ebx = 0x0;
++ tsk->regs.ecx = count;
++ tsk->regs.edx = start;
++ tsk->buf = entries;
++ tsk->buf_len = sizeof(struct vesafb_pal_entry) * count;
++ tsk->flags = TF_CALL | TF_BUF_DI;
++
++ if (!vesafb_queue_task (tsk))
++ vesafb_wait_for_task(tsk);
++ if ((tsk->regs.eax & 0xffff) != 0x004f)
++ ret = 1;
++ kfree(tsk);
++ }
++ return ret;
++}
++
++static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
++ unsigned blue, unsigned transp,
++ struct fb_info *info)
++{
++ struct vesafb_pal_entry entry;
++ int shift = 16 - info->var.green.length;
++ int ret = 0;
++
++ if (regno >= info->cmap.len)
++ return -EINVAL;
++
++ if (info->var.bits_per_pixel == 8) {
++ entry.red = red >> shift;
++ entry.green = green >> shift;
++ entry.blue = blue >> shift;
++ entry.pad = 0;
++
++ ret = vesafb_setpalette(&entry, 1, regno, info);
++ } else if (regno < 16) {
++ switch (info->var.bits_per_pixel) {
++ case 16:
++ if (info->var.red.offset == 10) {
++ /* 1:5:5:5 */
++ ((u32*) (info->pseudo_palette))[regno] =
++ ((red & 0xf800) >> 1) |
++ ((green & 0xf800) >> 6) |
++ ((blue & 0xf800) >> 11);
++ } else {
++ /* 0:5:6:5 */
++ ((u32*) (info->pseudo_palette))[regno] =
++ ((red & 0xf800) ) |
++ ((green & 0xfc00) >> 5) |
++ ((blue & 0xf800) >> 11);
++ }
++ break;
++
++ case 24:
++ case 32:
++ red >>= 8;
++ green >>= 8;
++ blue >>= 8;
++ ((u32 *)(info->pseudo_palette))[regno] =
++ (red << info->var.red.offset) |
++ (green << info->var.green.offset) |
++ (blue << info->var.blue.offset);
++ break;
++ }
++ }
++ return ret;
++}
++
++static int vesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
++{
++ struct vesafb_pal_entry *entries;
++ int shift = 16 - info->var.green.length;
++ int i, ret = 0;
++
++ if (info->var.bits_per_pixel == 8) {
++ if (cmap->start + cmap->len > info->cmap.start +
++ info->cmap.len || cmap->start < info->cmap.start)
++ return -EINVAL;
++
++ entries = vmalloc(sizeof(struct vesafb_pal_entry) * cmap->len);
++ if (!entries)
++ return -ENOMEM;
++ for (i = 0; i < cmap->len; i++) {
++ entries[i].red = cmap->red[i] >> shift;
++ entries[i].green = cmap->green[i] >> shift;
++ entries[i].blue = cmap->blue[i] >> shift;
++ entries[i].pad = 0;
++ }
++ ret = vesafb_setpalette(entries, cmap->len, cmap->start, info);
++ vfree(entries);
++ } else {
++ /* For modes with bpp > 8, we only set the pseudo palette in
++ * the fb_info struct. We rely on vesafb_setcolreg to do all
++ * sanity checking. */
++ for (i = 0; i < cmap->len; i++) {
++ ret += vesafb_setcolreg(cmap->start + i, cmap->red[i],
++ cmap->green[i], cmap->blue[i],
++ 0, info);
++ }
++ }
++ return ret;
++}
++
++static int vesafb_set_par(struct fb_info *info)
++{
++ struct vesafb_par *par = (struct vesafb_par *) info->par;
++ struct vesafb_task *tsk;
++ struct vesafb_crtc_ib *crtc = NULL;
++ struct vesafb_mode_ib *mode = NULL;
++ int i, err = 0, depth = info->var.bits_per_pixel;
++
++ if (depth > 8 && depth != 32)
++ depth = info->var.red.length + info->var.green.length +
++ info->var.blue.length;
++
++ i = vesafb_find_vbe_mode(info->var.xres, info->var.yres, depth,
++ VESAFB_NEED_EXACT_RES |
++ VESAFB_NEED_EXACT_DEPTH);
++ if (i >= 0)
++ mode = &vbe_modes[i];
++ else
++ return -EINVAL;
++
++ vesafb_create_task (tsk);
++ if (!tsk)
++ return -ENOMEM;
++ tsk->regs.eax = 0x4f02;
++ tsk->regs.ebx = mode->mode_id | 0x4000; /* use LFB */
++ tsk->flags = TF_CALL;
++
++ if (vbe_ib.vbe_version >= 0x0300 && !nocrtc &&
++ info->var.pixclock != 0) {
++ tsk->regs.ebx |= 0x0800; /* use CRTC data */
++ tsk->flags |= TF_BUF_DI;
++ crtc = kmalloc(sizeof(struct vesafb_crtc_ib), GFP_KERNEL);
++ if (!crtc) {
++ err = -ENOMEM;
++ goto out;
++ }
++ crtc->horiz_start = info->var.xres + info->var.right_margin;
++ crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
++ crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
++
++ crtc->vert_start = info->var.yres + info->var.lower_margin;
++ crtc->vert_end = crtc->vert_start + info->var.vsync_len;
++ crtc->vert_total = crtc->vert_end + info->var.upper_margin;
++
++ crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
++ crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
++ (crtc->vert_total * crtc->horiz_total)));
++ crtc->flags = 0;
++
++ if (info->var.vmode & FB_VMODE_DOUBLE)
++ crtc->flags |= 0x1;
++ if (info->var.vmode & FB_VMODE_INTERLACED)
++ crtc->flags |= 0x2;
++ if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
++ crtc->flags |= 0x4;
++ if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
++ crtc->flags |= 0x8;
++ memcpy(&par->crtc, crtc, sizeof(struct vesafb_crtc_ib));
++ } else
++ memset(&par->crtc, 0, sizeof(struct vesafb_crtc_ib));
++
++ tsk->buf = (void*)crtc;
++ tsk->buf_len = sizeof(struct vesafb_crtc_ib);
++
++ if (vesafb_queue_task (tsk)) {
++ err = -EINVAL;
++ goto out;
++ }
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f) {
++ printk(KERN_ERR "vesafb: mode switch failed (eax: 0x%lx)\n",
++ tsk->regs.eax);
++ err = -EINVAL;
++ goto out;
++ }
++ par->mode_idx = i;
++
++ /* For 8bpp modes, always try to set the DAC to 8 bits. */
++ if (vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
++ mode->bits_per_pixel <= 8) {
++ vesafb_reset_task(tsk);
++ tsk->flags = TF_CALL;
++ tsk->regs.eax = 0x4f08;
++ tsk->regs.ebx = 0x0800;
++
++ if (!vesafb_queue_task (tsk))
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f ||
++ ((tsk->regs.ebx & 0xff00) >> 8) != 8) {
++ /* We've failed to set the DAC palette format -
++ * time to correct var. */
++ info->var.red.length = 6;
++ info->var.green.length = 6;
++ info->var.blue.length = 6;
++ }
++ }
++
++ info->fix.visual = (info->var.bits_per_pixel == 8) ?
++ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
++ info->fix.line_length = mode->bytes_per_scan_line;
++
++ DPRINTK("set new mode %dx%d-%d (0x%x)\n",
++ info->var.xres, info->var.yres, info->var.bits_per_pixel,
++ mode->mode_id);
++
++out: if (crtc != NULL)
++ kfree(crtc);
++ kfree(tsk);
++
++ return err;
++}
++
++static void vesafb_setup_var(struct fb_var_screeninfo *var, struct fb_info *info,
++ struct vesafb_mode_ib *mode)
++{
++ var->xres = mode->x_res;
++ var->yres = mode->y_res;
++ var->xres_virtual = mode->x_res;
++ var->yres_virtual = (ypan) ?
++ info->fix.smem_len / mode->bytes_per_scan_line :
++ mode->y_res;
++ var->xoffset = 0;
++ var->yoffset = 0;
++ var->bits_per_pixel = mode->bits_per_pixel;
++
++ if (var->bits_per_pixel == 15)
++ var->bits_per_pixel = 16;
++
++ if (var->bits_per_pixel > 8) {
++ var->red.offset = mode->red_off;
++ var->red.length = mode->red_len;
++ var->green.offset = mode->green_off;
++ var->green.length = mode->green_len;
++ var->blue.offset = mode->blue_off;
++ var->blue.length = mode->blue_len;
++ var->transp.offset = mode->rsvd_off;
++ var->transp.length = mode->rsvd_len;
++
++ DPRINTK("directcolor: size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
++ mode->rsvd_len,
++ mode->red_len,
++ mode->green_len,
++ mode->blue_len,
++ mode->rsvd_off,
++ mode->red_off,
++ mode->green_off,
++ mode->blue_off);
++ } else {
++ var->red.offset = 0;
++ var->green.offset = 0;
++ var->blue.offset = 0;
++ var->transp.offset = 0;
++
++ /* We're assuming that we can switch the DAC to 8 bits. If
++ * this proves to be incorrect, we'll update the fields
++ * later in set_par(). */
++ if (vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
++ var->red.length = 8;
++ var->green.length = 8;
++ var->blue.length = 8;
++ var->transp.length = 0;
++ } else {
++ var->red.length = 6;
++ var->green.length = 6;
++ var->blue.length = 6;
++ var->transp.length = 0;
++ }
++ }
++}
++
++static void inline vesafb_check_limits(struct fb_var_screeninfo *var,
++ struct fb_info *info)
++{
++ struct fb_videomode *mode;
++
++ if (!var->pixclock)
++ return;
++ if (vbe_ib.vbe_version < 0x0300) {
++ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
++ return;
++ }
++ if (!fb_validate_mode(var, info))
++ return;
++ mode = fb_find_best_mode(var, &info->modelist);
++ if (mode) {
++ DPRINTK("find_best_mode: %d %d @ %d (vmode: %d)\n",
++ mode->xres, mode->yres, mode->refresh, mode->vmode);
++ if (mode->xres == var->xres && mode->yres == var->yres &&
++ !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
++ fb_videomode_to_var(var, mode);
++ return;
++ }
++ }
++ if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
++ return;
++ /* Use default refresh rate */
++ var->pixclock = 0;
++}
++
++static int vesafb_check_var(struct fb_var_screeninfo *var,
++ struct fb_info *info)
++{
++ int match = -1;
++ int depth = var->red.length + var->green.length + var->blue.length;
++
++ /* Various apps will use bits_per_pixel to set the color depth,
++ * which is theoretically incorrect, but which we'll try to handle
++ * here. */
++ if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
++ depth = var->bits_per_pixel;
++ match = vesafb_find_vbe_mode(var->xres, var->yres, depth,
++ VESAFB_NEED_EXACT_RES);
++
++ if (match == -1) {
++ DPRINTK("vesafb: mode %dx%d-%d not found\n", var->xres,
++ var->yres, depth);
++ return -EINVAL;
++ }
++
++ vesafb_setup_var(var, info, &vbe_modes[match]);
++ DPRINTK("found mode 0x%x (%dx%d-%dbpp)\n",
++ vbe_modes[match].mode_id, vbe_modes[match].x_res,
++ vbe_modes[match].y_res, vbe_modes[match].depth);
++
++ /* Check whether we have remapped enough memory for this mode. */
++ if (var->yres * vbe_modes[match].bytes_per_scan_line >
++ info->fix.smem_len) {
++ return -EINVAL;
++ }
++
++ if ((var->vmode & FB_VMODE_DOUBLE) &&
++ !(vbe_modes[match].mode_attr & 0x100))
++ var->vmode &= ~FB_VMODE_DOUBLE;
++ if ((var->vmode & FB_VMODE_INTERLACED) &&
++ !(vbe_modes[match].mode_attr & 0x200))
++ var->vmode &= ~FB_VMODE_INTERLACED;
++ vesafb_check_limits(var, info);
++ return 0;
++}
++
++static int vesafb_open(struct fb_info *info, int user)
++{
++ struct vesafb_task *tsk = NULL;
++ struct vesafb_par *par = info->par;
++ int cnt = atomic_read(&par->ref_count);
++
++ if (!cnt) {
++ vesafb_create_task(tsk);
++ if (!tsk)
++ goto out;
++
++ /* Get the VBE state buffer size. We want all available
++ * hardware state data (CL = 0x0f). */
++ tsk->regs.eax = 0x4f04;
++ tsk->regs.ecx = 0x000f;
++ tsk->regs.edx = 0x0000;
++ tsk->flags = TF_CALL;
++
++ if (vesafb_queue_task(tsk))
++ goto out;
++
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f) {
++ printk(KERN_WARNING "vesafb: VBE state buffer size "
++ "cannot be determined (eax: 0x%lx)\n",
++ tsk->regs.eax);
++ goto out;
++ }
++
++ par->vbe_state_size = 64 * (tsk->regs.ebx & 0xffff);
++ par->vbe_state = kzalloc(par->vbe_state_size, GFP_KERNEL);
++ if (!par->vbe_state)
++ goto out;
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f04;
++ tsk->regs.ecx = 0x000f;
++ tsk->regs.edx = 0x0001;
++ tsk->flags = TF_CALL | TF_BUF_BX | TF_RETURN_BUF;
++ tsk->buf = (void*)(par->vbe_state);
++ tsk->buf_len = par->vbe_state_size;
++
++ if (vesafb_queue_task(tsk))
++ goto getstate_failed;
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f) {
++ printk(KERN_WARNING "vesafb: VBE get state call "
++ "failed (eax: 0x%lx)\n", tsk->regs.eax);
++ goto getstate_failed;
++ }
++ }
++out:
++ atomic_inc(&par->ref_count);
++ if (tsk)
++ kfree(tsk);
++ return 0;
++
++getstate_failed:
++ kfree(par->vbe_state);
++ par->vbe_state = NULL;
++ par->vbe_state_size = 0;
++ goto out;
++}
++
++static int vesafb_release(struct fb_info *info, int user)
++{
++ struct vesafb_task *tsk = NULL;
++ struct vesafb_par *par = info->par;
++ int cnt = atomic_read(&par->ref_count);
++
++ if (!cnt)
++ return -EINVAL;
++
++ if (cnt == 1 && par->vbe_state && par->vbe_state_size) {
++ vesafb_create_task(tsk);
++ if (!tsk)
++ goto out;
++
++ tsk->regs.eax = 0x0003;
++ tsk->regs.ebx = 0x0000;
++ tsk->flags = TF_CALL;
++
++ if (vesafb_queue_task(tsk))
++ goto out;
++
++ vesafb_wait_for_task(tsk);
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f04;
++ tsk->regs.ecx = 0x000f;
++ tsk->regs.edx = 0x0002;
++ tsk->buf = (void*)(par->vbe_state);
++ tsk->buf_len = par->vbe_state_size;
++ tsk->flags = TF_CALL | TF_BUF_BX;
++
++ if (vesafb_queue_task(tsk))
++ goto out;
++
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f)
++ printk(KERN_WARNING "vesafb: VBE state restore call "
++ "failed (eax: 0x%lx)\n",
++ tsk->regs.eax);
++ }
++out:
++ atomic_dec(&par->ref_count);
++ if (tsk)
++ kfree(tsk);
++ return 0;
++}
++
++static int __init vesafb_probe(struct platform_device *device);
++
++static struct fb_ops vesafb_ops = {
++ .owner = THIS_MODULE,
++ .fb_open = vesafb_open,
++ .fb_release = vesafb_release,
++ .fb_setcolreg = vesafb_setcolreg,
++ .fb_setcmap = vesafb_setcmap,
++ .fb_pan_display = vesafb_pan_display,
++ .fb_blank = vesafb_blank,
++ .fb_fillrect = cfb_fillrect,
++ .fb_copyarea = cfb_copyarea,
++ .fb_imageblit = cfb_imageblit,
++ .fb_check_var = vesafb_check_var,
++ .fb_set_par = vesafb_set_par
++};
++
++static struct platform_driver vesafb_driver = {
++ .probe = vesafb_probe,
++ .driver = {
++ .name = "vesafb",
++ },
++};
++
++static struct platform_device *vesafb_device;
++
++#ifndef MODULE
++int __init vesafb_setup(char *options)
++{
++ char *this_opt;
++
++ if (!options || !*options)
++ return 0;
++
++ DPRINTK("options %s\n",options);
++
++ while ((this_opt = strsep(&options, ",")) != NULL) {
++ if (!*this_opt) continue;
++
++ DPRINTK("this_opt: %s\n",this_opt);
++
++ if (! strcmp(this_opt, "redraw"))
++ ypan=0;
++ else if (! strcmp(this_opt, "ypan"))
++ ypan=1;
++ else if (! strcmp(this_opt, "ywrap"))
++ ypan=2;
++ else if (! strcmp(this_opt, "vgapal"))
++ pmi_setpal=0;
++ else if (! strcmp(this_opt, "pmipal"))
++ pmi_setpal=1;
++ else if (! strncmp(this_opt, "mtrr:", 5))
++ mtrr = simple_strtoul(this_opt+5, NULL, 0);
++ else if (! strcmp(this_opt, "nomtrr"))
++ mtrr=0;
++ else if (! strcmp(this_opt, "nocrtc"))
++ nocrtc=1;
++ else if (! strcmp(this_opt, "noedid"))
++ noedid=1;
++ else if (! strcmp(this_opt, "noblank"))
++ blank=0;
++ else if (! strcmp(this_opt, "gtf"))
++ gtf=1;
++ else if (! strncmp(this_opt, "vtotal:", 7))
++ vram_total = simple_strtoul(this_opt + 7, NULL, 0);
++ else if (! strncmp(this_opt, "vremap:", 7))
++ vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
++ else if (! strncmp(this_opt, "maxhf:", 6))
++ maxhf = simple_strtoul(this_opt + 6, NULL, 0);
++ else if (! strncmp(this_opt, "maxvf:", 6))
++ maxvf = simple_strtoul(this_opt + 6, NULL, 0);
++ else if (! strncmp(this_opt, "maxclk:", 7))
++ maxclk = simple_strtoul(this_opt + 7, NULL, 0);
++ else if (! strncmp(this_opt, "vbemode:", 8))
++ vbemode = simple_strtoul(this_opt + 8, NULL,0);
++ else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
++ DPRINTK("mode_option: %s\n",this_opt);
++ mode_option = this_opt;
++ } else {
++ printk(KERN_WARNING
++ "vesafb: unrecognized option %s\n", this_opt);
++ }
++ }
++
++ return 0;
++}
++#endif /* !MODULE */
++
++static int vesafb_read_proc_modes(char *buf, char **start, off_t offset,
++ int len, int *eof, void *private)
++{
++ int clen = 0, i;
++
++ for (i = 0; i < vbe_modes_cnt; i++) {
++ clen += min(snprintf(buf + clen, len - clen, "%dx%d-%d\n", vbe_modes[i].x_res,
++ vbe_modes[i].y_res, vbe_modes[i].depth), len - clen);
++ }
++ *eof = 1;
++ return clen;
++}
++
++static int vesafb_read_proc_vbe_info(char *buf, char **start, off_t offset,
++ int len, int *eof, void *private)
++{
++ int clen = 0;
++
++ clen += min(snprintf(buf + clen, len, "Version: %d.%d\n",
++ ((vbe_ib.vbe_version & 0xff00) >> 8),
++ vbe_ib.vbe_version & 0xff), len);
++ clen += min(snprintf(buf + clen, len - clen, "Vendor: %s\n",
++ (char*)vbe_ib.oem_vendor_name_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "Product: %s\n",
++ (char*)vbe_ib.oem_product_name_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "OEM rev: %s\n",
++ (char*)vbe_ib.oem_product_rev_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "OEM string: %s\n",
++ (char*)vbe_ib.oem_string_ptr), len - clen);
++
++ *eof = 1;
++ return clen;
++}
++
++static int __init inline vesafb_vbe_getinfo(struct vesafb_task *tsk)
++{
++ tsk->regs.eax = 0x4f00;
++ tsk->flags = TF_CALL | TF_GETVBEIB;
++ tsk->buf = &vbe_ib;
++ tsk->buf_len = sizeof(vbe_ib);
++ if (vesafb_queue_task (tsk))
++ return -EINVAL;
++ vesafb_wait_for_task(tsk);
++
++ if (vbe_ib.vbe_version < 0x0200) {
++ printk(KERN_ERR "vesafb: Sorry, pre-VBE 2.0 cards are "
++ "not supported.\n");
++ return -EINVAL;
++ }
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f) {
++ printk(KERN_ERR "vesafb: Getting mode info block failed "
++ "(eax=0x%x)\n", (u32)tsk->regs.eax);
++ return -EINVAL;
++ }
++
++ printk(KERN_INFO "vesafb: %s, %s, %s (OEM: %s)\n",
++ (char*)vbe_ib.oem_vendor_name_ptr,
++ (char*)vbe_ib.oem_product_name_ptr,
++ (char*)vbe_ib.oem_product_rev_ptr,
++ (char*)vbe_ib.oem_string_ptr);
++
++ printk(KERN_INFO "vesafb: VBE version: %d.%d\n",
++ ((vbe_ib.vbe_version & 0xff00) >> 8),
++ vbe_ib.vbe_version & 0xff);
++ return 0;
++}
++
++static int __init inline vesafb_vbe_getmodes(struct vesafb_task *tsk)
++{
++ u16 *mode = 0;
++ int off = 0;
++
++ /* Count available modes. */
++ mode = (u16*)vbe_ib.mode_list_ptr;
++ while (*mode != 0xffff) {
++ vbe_modes_cnt++;
++ mode++;
++ }
++
++ vbe_modes = kmalloc(sizeof(struct vesafb_mode_ib)*
++ vbe_modes_cnt, GFP_KERNEL);
++ if (!vbe_modes)
++ return -ENOMEM;
++
++ /* Get mode info for all available modes. */
++ mode = (u16*)vbe_ib.mode_list_ptr;
++
++ while (*mode != 0xffff) {
++ struct vesafb_mode_ib *mib;
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f01;
++ tsk->regs.ecx = (u32) *mode;
++ tsk->flags = TF_CALL | TF_RETURN_BUF | TF_BUF_DI;
++ tsk->buf = vbe_modes+off;
++ tsk->buf_len = sizeof(struct vesafb_mode_ib);
++ if (vesafb_queue_task(tsk))
++ return -EINVAL;
++ vesafb_wait_for_task(tsk);
++ mib = p_mode(tsk->buf);
++ mib->mode_id = *mode;
++
++ /* We only want modes that are supported with the currennt
++ * hardware configuration (D0), color (D3), graphics (D4)
++ * and that have support for the LFB (D7). */
++ if ((mib->mode_attr & 0x99) == 0x99 &&
++ mib->bits_per_pixel >= 8) {
++ off++;
++ } else {
++ vbe_modes_cnt--;
++ }
++ mode++;
++ mib->depth = mib->red_len + mib->green_len + mib->blue_len;
++ /* Handle 8bpp modes and modes with broken color component
++ * lengths. */
++ if (mib->depth == 0 ||
++ (mib->depth == 24 && mib->bits_per_pixel == 32))
++ mib->depth = mib->bits_per_pixel;
++ }
++
++ return 0;
++}
++
++static int __init inline vesafb_vbe_getpmi(struct vesafb_task *tsk)
++{
++ int i;
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f0a;
++ tsk->regs.ebx = 0x0;
++ tsk->flags = TF_CALL;
++ if (vesafb_queue_task(tsk))
++ return -EINVAL;
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f || tsk->regs.es < 0xc000) {
++ pmi_setpal = ypan = 0;
++ } else {
++ pmi_base = (u16*)phys_to_virt(((u32)tsk->regs.es << 4) +
++ tsk->regs.edi);
++ pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
++ pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
++ printk(KERN_INFO "vesafb: protected mode interface info at "
++ "%04x:%04x\n",
++ (u16)tsk->regs.es, (u16)tsk->regs.edi);
++ printk(KERN_INFO "vesafb: pmi: set display start = %p, "
++ "set palette = %p\n", pmi_start, pmi_pal);
++
++ if (pmi_base[3]) {
++ printk(KERN_INFO "vesafb: pmi: ports = ");
++ for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
++ printk("%x ",pmi_base[i]);
++ printk("\n");
++
++ /*
++ * memory areas not supported (yet?)
++ *
++ * Rules are: we have to set up a descriptor for the
++ * requested memory area and pass it in the ES register
++ * to the BIOS function.
++ */
++ if (pmi_base[i] != 0xffff) {
++ printk(KERN_INFO "vesafb: can't handle memory "
++ "requests, pmi disabled\n");
++ ypan = pmi_setpal = 0;
++ }
++ }
++ }
++ return 0;
++}
++
++static int __init inline vesafb_vbe_getedid(struct vesafb_task *tsk,
++ struct fb_info *info)
++{
++ int res = 0;
++
++ if (noedid || vbe_ib.vbe_version < 0x0300)
++ return -EINVAL;
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f15;
++ tsk->regs.ebx = 0;
++ tsk->regs.ecx = 0;
++ if (vesafb_queue_task(tsk))
++ return -EINVAL;
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) != 0x004f)
++ return -EINVAL;
++
++ if ((tsk->regs.ebx & 0x3) == 3) {
++ printk(KERN_INFO "vesafb: VBIOS/hardware supports both "
++ "DDC1 and DDC2 transfers\n");
++ } else if ((tsk->regs.ebx & 0x3) == 2) {
++ printk(KERN_INFO "vesafb: VBIOS/hardware supports DDC2 "
++ "transfers\n");
++ } else if ((tsk->regs.ebx & 0x3) == 1) {
++ printk(KERN_INFO "vesafb: VBIOS/hardware supports DDC1 "
++ "transfers\n");
++ } else {
++ printk(KERN_INFO "vesafb: VBIOS/hardware doesn't support "
++ "DDC transfers\n");
++ return -EINVAL;
++ }
++
++ vesafb_reset_task(tsk);
++ tsk->regs.eax = 0x4f15;
++ tsk->regs.ebx = 1;
++ tsk->regs.ecx = tsk->regs.edx = 0;
++ tsk->flags = TF_CALL | TF_RETURN_BUF | TF_BUF_DI;
++ tsk->buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
++ tsk->buf_len = EDID_LENGTH;
++
++ if (vesafb_queue_task(tsk)) {
++ res = -EINVAL;
++ goto out;
++ }
++ vesafb_wait_for_task(tsk);
++
++ if ((tsk->regs.eax & 0xffff) == 0x004f) {
++ fb_edid_to_monspecs(tsk->buf, &info->monspecs);
++ fb_videomode_to_modelist(info->monspecs.modedb,
++ info->monspecs.modedb_len, &info->modelist);
++ if (info->monspecs.vfmax && info->monspecs.hfmax) {
++ /* If the maximum pixel clock wasn't specified in
++ * the EDID block, set it to 300 MHz. */
++ if (info->monspecs.dclkmax == 0)
++ info->monspecs.dclkmax = 300 * 1000000;
++ info->monspecs.gtf = 1;
++ } else {
++ res = -EINVAL;
++ }
++ }
++
++out: kfree(tsk->buf);
++ return res;
++}
++
++static void __init inline vesafb_vbe_getmonspecs(struct vesafb_task *tsk,
++ struct fb_info *info)
++{
++ struct fb_var_screeninfo var;
++ int i;
++ memset(&info->monspecs, 0, sizeof(struct fb_monspecs));
++
++ /* If we didn't get all necessary data from the EDID block,
++ * mark it as incompatible with the GTF. */
++ if (vesafb_vbe_getedid(tsk, info))
++ info->monspecs.gtf = 0;
++
++ /* Kernel command line overrides. */
++ if (maxclk)
++ info->monspecs.dclkmax = maxclk * 1000000;
++ if (maxvf)
++ info->monspecs.vfmax = maxvf;
++ if (maxhf)
++ info->monspecs.hfmax = maxhf * 1000;
++
++ /* In case DDC transfers are not supported the user can provide
++ * monitor limits manually. Lower limits are set to "safe" values. */
++ if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
++ info->monspecs.dclkmin = 0;
++ info->monspecs.vfmin = 60;
++ info->monspecs.hfmin = 29000;
++ info->monspecs.gtf = 1;
++ }
++
++ if (info->monspecs.gtf) {
++ printk(KERN_INFO
++ "vesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
++ "clk = %d MHz\n", info->monspecs.vfmax,
++ (int)(info->monspecs.hfmax / 1000),
++ (int)(info->monspecs.dclkmax / 1000000));
++ /* Add valid VESA video modes to our modelist. */
++ for (i = 0; i < VESA_MODEDB_SIZE; i++) {
++ fb_videomode_to_var(&var, (struct fb_videomode *)
++ &vesa_modes[i]);
++ if (!fb_validate_mode(&var, info))
++ fb_add_videomode((struct fb_videomode *)
++ &vesa_modes[i],
++ &info->modelist);
++ }
++ } else {
++ /* Add all VESA video modes to our modelist. */
++ fb_videomode_to_modelist((struct fb_videomode *)vesa_modes,
++ VESA_MODEDB_SIZE, &info->modelist);
++ printk(KERN_INFO "vesafb: no monitor limits have been set\n");
++ }
++ return;
++}
++
++static int __init inline vesafb_vbe_init(struct fb_info *info)
++{
++ struct vesafb_task *tsk;
++ int res = 0;
++
++ vesafb_create_task(tsk);
++ if (!tsk)
++ return -EINVAL;
++ if ((res = vesafb_vbe_getinfo(tsk)) != 0)
++ goto out;
++ if ((res = vesafb_vbe_getmodes(tsk)) != 0)
++ goto out;
++ if (pmi_setpal || ypan)
++ vesafb_vbe_getpmi(tsk);
++
++ INIT_LIST_HEAD(&info->modelist);
++ vesafb_vbe_getmonspecs(tsk, info);
++
++out: kfree(tsk);
++ return res;
++}
++
++static int __init decode_mode(u32 *xres, u32 *yres, u32 *bpp, u32 *refresh)
++{
++ int len = strlen(mode_option), i, err = 0;
++ u8 res_specified = 0, bpp_specified = 0, refresh_specified = 0,
++ yres_specified = 0;
++
++ for (i = len-1; i >= 0; i--) {
++ switch (mode_option[i]) {
++ case '@':
++ len = i;
++ if (!refresh_specified && !bpp_specified &&
++ !yres_specified) {
++ *refresh = simple_strtoul(&mode_option[i+1],
++ NULL, 0);
++ refresh_specified = 1;
++ } else
++ goto out;
++ break;
++ case '-':
++ len = i;
++ if (!bpp_specified && !yres_specified) {
++ *bpp = simple_strtoul(&mode_option[i+1],
++ NULL, 0);
++ bpp_specified = 1;
++ } else
++ goto out;
++ break;
++ case 'x':
++ if (!yres_specified) {
++ *yres = simple_strtoul(&mode_option[i+1],
++ NULL, 0);
++ yres_specified = 1;
++ } else
++ goto out;
++ break;
++ case '0'...'9':
++ break;
++ default:
++ goto out;
++ }
++ }
++
++ if (i < 0 && yres_specified) {
++ *xres = simple_strtoul(mode_option, NULL, 0);
++ res_specified = 1;
++ }
++
++out: if (!res_specified || !yres_specified) {
++ printk(KERN_ERR "vesafb: invalid resolution, "
++ "%s not specified\n",
++ (!res_specified) ? "width" : "height");
++ err = -EINVAL;
++ }
++
++ return err;
++}
++
++static int __init vesafb_init_set_mode(struct fb_info *info)
++{
++ struct fb_videomode *fbmode;
++ struct fb_videomode mode;
++ int i, modeid, refresh = 0;
++ u8 refresh_specified = 0;
++
++ if (!mode_option)
++ mode_option = CONFIG_FB_VESA_DEFAULT_MODE;
++
++ if (vbemode > 0) {
++ for (i = 0; i < vbe_modes_cnt; i++) {
++ if (vbe_modes[i].mode_id == vbemode) {
++ info->var.vmode = FB_VMODE_NONINTERLACED;
++ info->var.sync = FB_SYNC_VERT_HIGH_ACT;
++ vesafb_setup_var(&info->var, info,
++ &vbe_modes[i]);
++ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
++ 60, &info->var, info);
++ /* With pixclock set to 0, the default BIOS
++ * timings will be used in set_par(). */
++ info->var.pixclock = 0;
++ modeid = i;
++ goto out;
++ }
++ }
++ printk(KERN_INFO "specified VBE mode %d not found\n",
++ vbemode);
++ vbemode = 0;
++ }
++
++ /* Decode the mode specified on the kernel command line. We save
++ * the depth into bits_per_pixel, which is wrong, but will work
++ * anyway. */
++ if (decode_mode(&info->var.xres, &info->var.yres,
++ &info->var.bits_per_pixel, &refresh))
++ return -EINVAL;
++ if (refresh)
++ refresh_specified = 1;
++ else
++ refresh = 60;
++
++ /* Look for a matching VBE mode. We can live if an exact match
++ * cannot be found. */
++ modeid = vesafb_find_vbe_mode(info->var.xres, info->var.yres,
++ info->var.bits_per_pixel, 0);
++
++ if (modeid == -1) {
++ return -EINVAL;
++ } else {
++ info->var.vmode = FB_VMODE_NONINTERLACED;
++ info->var.sync = FB_SYNC_VERT_HIGH_ACT;
++ vesafb_setup_var(&info->var, info, &vbe_modes[modeid]);
++ }
++ if (vbe_ib.vbe_version < 0x0300) {
++ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
++ &info->var, info);
++ goto out;
++ }
++ if (!gtf) {
++ struct fb_videomode tmode;
++
++ if (refresh_specified) {
++ fb_var_to_videomode(&tmode, &info->var);
++ tmode.refresh = refresh;
++ fbmode = fb_find_nearest_mode(&tmode,
++ &info->modelist);
++ } else
++ fbmode = fb_find_best_mode(&info->var,
++ &info->modelist);
++
++ if (fbmode->xres == info->var.xres &&
++ fbmode->yres == info->var.yres &&
++ !(fbmode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))
++ && (!refresh_specified ||
++ abs(refresh - fbmode->refresh) <= 5)) {
++ fb_videomode_to_var(&info->var, fbmode);
++ return modeid;
++ }
++ }
++ i = FB_MAXTIMINGS;
++ if (!info->monspecs.gtf)
++ i = FB_IGNOREMON | FB_VSYNCTIMINGS;
++ else if (refresh_specified)
++ i = FB_VSYNCTIMINGS;
++ if (!fb_get_mode(i, refresh, &info->var, info))
++ goto out;
++ if (info->monspecs.gtf &&
++ !fb_get_mode(FB_MAXTIMINGS, 0, &info->var, info))
++ goto out;
++ /* Use default refresh rate */
++ printk(KERN_WARNING "vesafb: using default BIOS refresh rate\n");
++ info->var.pixclock = 0;
++
++out:
++ fb_var_to_videomode(&mode, &info->var);
++ fb_add_videomode(&mode, &info->modelist);
++ return modeid;
++}
++
++static int __init vesafb_probe(struct platform_device *dev)
++{
++ char entry[16];
++ struct fb_info *info;
++ struct vesafb_mode_ib *mode = NULL;
++ int err = 0, i, h;
++ unsigned int size_vmode;
++ unsigned int size_remap;
++ unsigned int size_total;
++
++ vesafb_info = info = framebuffer_alloc(sizeof(struct vesafb_par) +
++ sizeof(u32) * 256, &dev->dev);
++ if (!info)
++ return -ENOMEM;
++
++ if (vesafb_wait_for_thread()) {
++ printk(KERN_ERR "vesafb: vesafb thread not running\n");
++ framebuffer_release(info);
++ return -EINVAL;
++ }
++
++ if (vesafb_vbe_init(info)) {
++ printk(KERN_ERR "vesafb: vbe_init failed\n");
++ err = -EINVAL;
++ goto out;
++ }
++
++ vesafb_fix.ypanstep = ypan ? 1 : 0;
++ vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
++
++ info->pseudo_palette = ((u8*)info->par + sizeof(struct vesafb_par));
++ info->fbops = &vesafb_ops;
++ info->var = vesafb_defined;
++ info->fix = vesafb_fix;
++
++ if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
++ err = -ENXIO;
++ goto out;
++ }
++
++ i = vesafb_init_set_mode(info);
++ if (i < 0) {
++ err = -EINVAL;
++ goto out_cmap;
++ } else
++ mode = &vbe_modes[i];
++
++ /* Disable blanking if the user requested so. */
++ if (!blank) {
++ info->fbops->fb_blank = NULL;
++ }
++
++ /* Find out how much IO memory is required for the mode with
++ * the highest resolution. */
++ size_remap = 0;
++ for (i = 0; i < vbe_modes_cnt; i++) {
++ h = vbe_modes[i].bytes_per_scan_line * vbe_modes[i].y_res;
++ if (h > size_remap)
++ size_remap = h;
++ }
++ size_remap *= 2;
++
++ /* size_vmode -- that is the amount of memory needed for the
++ * used video mode, i.e. the minimum amount of
++ * memory we need. */
++ if (mode != NULL) {
++ size_vmode = info->var.yres * mode->bytes_per_scan_line;
++ } else {
++ size_vmode = info->var.yres * info->var.xres *
++ ((info->var.bits_per_pixel + 7) >> 3);
++ }
++
++ /* size_total -- all video memory we have. Used for mtrr
++ * entries, ressource allocation and bounds
++ * checking. */
++ size_total = vbe_ib.total_memory * 65536;
++ if (vram_total)
++ size_total = vram_total * 1024 * 1024;
++ if (size_total < size_vmode)
++ size_total = size_vmode;
++ ((struct vesafb_par*)(info->par))->mem_total = size_total;
++
++ /* size_remap -- the amount of video memory we are going to
++ * use for vesafb. With modern cards it is no
++ * option to simply use size_total as th
++ * wastes plenty of kernel address space. */
++ if (vram_remap)
++ size_remap = vram_remap * 1024 * 1024;
++ if (size_remap < size_vmode)
++ size_remap = size_vmode;
++ if (size_remap > size_total)
++ size_remap = size_total;
++
++ info->fix.smem_len = size_remap;
++ info->fix.smem_start = mode->phys_base_ptr;
++
++ /* We have to set it here, because when setup_var() was called,
++ * smem_len wasn't defined yet. */
++ info->var.yres_virtual = info->fix.smem_len /
++ mode->bytes_per_scan_line;
++
++ if (ypan && info->var.yres_virtual > info->var.yres) {
++ printk(KERN_INFO "vesafb: scrolling: %s "
++ "using protected mode interface, "
++ "yres_virtual=%d\n",
++ (ypan > 1) ? "ywrap" : "ypan",info->var.yres_virtual);
++ } else {
++ printk(KERN_INFO "vesafb: scrolling: redraw\n");
++ info->var.yres_virtual = info->var.yres;
++ ypan = 0;
++ }
++
++ info->flags = FBINFO_FLAG_DEFAULT |
++ (ypan) ? FBINFO_HWACCEL_YPAN : 0;
++
++ if (!ypan)
++ info->fbops->fb_pan_display = NULL;
++
++ if (!request_mem_region(info->fix.smem_start, size_total, "vesafb")) {
++ printk(KERN_WARNING "vesafb: cannot reserve video memory at "
++ "0x%lx\n", info->fix.smem_start);
++ /* We cannot make this fatal. Sometimes this comes from magic
++ spaces our resource handlers simply don't know about. */
++ }
++
++ info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
++
++ if (!info->screen_base) {
++ printk(KERN_ERR
++ "vesafb: abort, cannot ioremap video memory "
++ "0x%x @ 0x%lx\n",
++ info->fix.smem_len, info->fix.smem_start);
++ err = -EIO;
++ goto out_mem;
++ }
++
++ /* Request failure does not faze us, as vgacon probably has this
++ region already (FIXME) */
++ request_region(0x3c0, 32, "vesafb");
++
++#ifdef CONFIG_MTRR
++ if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
++ int temp_size = size_total;
++ unsigned int type = 0;
++
++ switch (mtrr) {
++ case 1:
++ type = MTRR_TYPE_UNCACHABLE;
++ break;
++ case 2:
++ type = MTRR_TYPE_WRBACK;
++ break;
++ case 3:
++ type = MTRR_TYPE_WRCOMB;
++ break;
++ case 4:
++ type = MTRR_TYPE_WRTHROUGH;
++ break;
++ default:
++ type = 0;
++ break;
++ }
++
++ if (type) {
++ int rc;
++
++ /* Find the largest power-of-two */
++ while (temp_size & (temp_size - 1))
++ temp_size &= (temp_size - 1);
++
++ /* Try and find a power of two to add */
++ do {
++ rc = mtrr_add(info->fix.smem_start,
++ temp_size, type, 1);
++ temp_size >>= 1;
++ } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
++ }
++ }
++#endif /* CONFIG_MTRR */
++
++ if (register_framebuffer(info) < 0) {
++ printk(KERN_ERR
++ "vesafb: failed to register framebuffer device\n");
++ err = -EINVAL;
++ goto out_mem;
++ }
++
++ printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
++ "using %dk, total %dk\n", info->fix.smem_start,
++ info->screen_base, size_remap/1024, size_total/1024);
++ printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
++ info->fix.id);
++
++ sprintf(entry, "fb%d", info->node);
++ proc_mkdir(entry, 0);
++
++ sprintf(entry, "fb%d/modes", info->node);
++ create_proc_read_entry(entry, 0, 0, vesafb_read_proc_modes, NULL);
++
++ sprintf(entry, "fb%d/vbe_info", info->node);
++ create_proc_read_entry(entry, 0, 0, vesafb_read_proc_vbe_info, NULL);
++ return 0;
++
++out_mem:
++ release_mem_region(info->fix.smem_start, size_total);
++ if (!list_empty(&info->modelist))
++ fb_destroy_modelist(&info->modelist);
++ fb_destroy_modedb(info->monspecs.modedb);
++out_cmap:
++ fb_dealloc_cmap(&info->cmap);
++out:
++ framebuffer_release(info);
++ vesafb_info = NULL;
++ kfree(vbe_modes);
++ vbe_modes = NULL;
++ return err;
++}
++
++int __init vesafb_init(void)
++{
++ int ret;
++#ifndef MODULE
++ char *option = NULL;
++
++ if (fb_get_options("vesafb", &option))
++ return -ENODEV;
++ vesafb_setup(option);
++#endif
++ ret = platform_driver_register(&vesafb_driver);
++
++ if (!ret) {
++ vesafb_device = platform_device_alloc("vesafb", 0);
++
++ if (vesafb_device)
++ ret = platform_device_add(vesafb_device);
++ else
++ ret = -ENOMEM;
++
++ if (ret) {
++ platform_device_put(vesafb_device);
++ platform_driver_unregister(&vesafb_driver);
++ }
++ }
++ return ret;
++}
++
++module_init(vesafb_init);
++
++#ifdef MODULE
++void __exit vesafb_exit(void)
++{
++ char entry[16];
++
++ if (vesafb_info)
++ unregister_framebuffer(vesafb_info);
++
++ platform_device_unregister(vesafb_device);
++ platform_driver_unregister(&vesafb_driver);
++
++ if (vesafb_info) {
++ struct vesafb_par *par = (struct vesafb_par*)vesafb_info->par;
++
++ sprintf(entry, "fb%d/modes", vesafb_info->node);
++ remove_proc_entry(entry, NULL);
++
++ sprintf(entry, "fb%d/vbe_info", vesafb_info->node);
++ remove_proc_entry(entry, NULL);
++
++ sprintf(entry, "fb%d", vesafb_info->node);
++ remove_proc_entry(entry, NULL);
++
++ iounmap(vesafb_info->screen_base);
++ release_mem_region(vesafb_info->fix.smem_start,
++ par->mem_total);
++ fb_dealloc_cmap(&vesafb_info->cmap);
++ if (!list_empty(&vesafb_info->modelist))
++ fb_destroy_modelist(&vesafb_info->modelist);
++ fb_destroy_modedb(vesafb_info->monspecs.modedb);
++ framebuffer_release(vesafb_info);
++ }
++
++ if (vbe_modes != NULL)
++ kfree(vbe_modes);
++}
++
++module_exit(vesafb_exit);
++
++static inline int param_get_scroll(char *buffer, struct kernel_param *kp)
++{
++ return 0;
++}
++static inline int param_set_scroll(const char *val, struct kernel_param *kp)
++{
++ ypan = 0;
++
++ if (! strcmp(val, "redraw"))
++ ypan = 0;
++ else if (! strcmp(val, "ypan"))
++ ypan = 1;
++ else if (! strcmp(val, "ywrap"))
++ ypan = 2;
++
++ return 0;
++}
++
++#define param_check_scroll(name, p) __param_check(name, p, void);
++
++module_param_named(scroll, ypan, scroll, 0);
++MODULE_PARM_DESC(scroll,"Scrolling mode, set to 'redraw', 'ypan' or 'ywrap'");
++module_param_named(vgapal, pmi_setpal, invbool, 0);
++MODULE_PARM_DESC(vgapal,"bool: set palette using VGA registers");
++module_param_named(pmipal, pmi_setpal, bool, 0);
++MODULE_PARM_DESC(pmipal,"bool: set palette using PMI calls");
++module_param(mtrr, uint, 0);
++MODULE_PARM_DESC(mtrr,"Memory Type Range Registers setting. Use 0 to disable.");
++module_param(blank, bool, 1);
++MODULE_PARM_DESC(blank,"bool: enable hardware blanking");
++module_param(nocrtc, bool, 0);
++MODULE_PARM_DESC(nocrtc,"bool: ignore CRTC timings when setting modes");
++module_param(noedid, bool, 0);
++MODULE_PARM_DESC(noedid,"bool: ignore EDID-provided monitor limits "
++ "when setting modes");
++module_param(gtf, bool, 0);
++MODULE_PARM_DESC(gtf,"bool: force use of VESA GTF to calculate mode timings");
++module_param(vram_remap, uint, 0);
++MODULE_PARM_DESC(vram_remap,"Set amount of video memory to be used [MiB]");
++module_param(vram_total, uint, 0);
++MODULE_PARM_DESC(vram_total,"Set total amount of video memoery [MiB]");
++module_param(maxclk, ushort, 0);
++MODULE_PARM_DESC(maxclk,"Maximum pixelclock [MHz], overrides EDID data");
++module_param(maxhf, ushort, 0);
++MODULE_PARM_DESC(maxhf,"Maximum horizontal frequency [kHz], "
++ "overrides EDID data");
++module_param(maxvf, ushort, 0);
++MODULE_PARM_DESC(maxvf,"Maximum vertical frequency [Hz], "
++ "overrides EDID data");
++module_param_named(mode, mode_option, charp, 0);
++MODULE_PARM_DESC(mode, "Specify resolution as "
++ "\"<xres>x<yres>[-<bpp>][@<refresh>]\"");
++module_param(vbemode, ushort, 0);
++MODULE_PARM_DESC(vbemode,"VBE mode number to set, overrides 'mode' setting");
++
++#endif /* MODULE */
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Michal Januszewski");
++MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
++
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index 4463735..7283e48 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -1390,6 +1390,8 @@ extern void mmput(struct mm_struct *);
+ extern struct mm_struct *get_task_mm(struct task_struct *task);
+ /* Remove the current tasks stale references to the old mm_struct */
+ extern void mm_release(struct task_struct *, struct mm_struct *);
++/* Create a new mm for a kernel thread */
++extern int set_new_mm(void);
+
+ extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
+ extern void flush_thread(void);
+diff --git a/include/video/vesa.h b/include/video/vesa.h
+new file mode 100644
+index 0000000..bb5abcf
+--- /dev/null
++++ b/include/video/vesa.h
+@@ -0,0 +1,150 @@
++#if 0
++#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , \
++ ## args)
++#else
++#define DPRINTK(fmt, args...)
++#endif
++
++#define p_crtc(arg) ((struct vesafb_crtc_ib*)(arg))
++#define p_vbe(arg) ((struct vesafb_vbe_ib*)(arg))
++#define p_mode(arg) ((struct vesafb_mode_ib*)(arg))
++
++struct vesafb_task {
++ u8 flags;
++ void *buf;
++ int buf_len;
++ struct vm86_regs regs;
++ struct list_head node;
++ struct completion done;
++};
++
++/* Vesafb task flags and masks */
++#define TF_CALL 0x00
++#define TF_EXIT 0x01
++#define TF_GETVBEIB 0x02
++#define TF_BUF_DI 0x04
++#define TF_BUF_BX 0x08
++#define TF_RETURN_BUF 0x10
++
++/* Macros and functions for manipulating vesafb tasks */
++#define vesafb_create_task(task) \
++do { \
++ task = kmalloc(sizeof(struct vesafb_task), GFP_ATOMIC); \
++ if (task) \
++ memset(task, 0, sizeof(struct vesafb_task)); \
++ init_completion(&task->done); \
++} while (0)
++
++#define vesafb_wait_for_task(task) wait_for_completion(&task->done);
++#define vesafb_reset_task(task) init_completion(&task->done);
++int vesafb_queue_task(struct vesafb_task *task);
++
++/* Functions for controlling the vesafb thread */
++int vesafb_wait_for_thread(void);
++
++#define VBE_CAP_CAN_SWITCH_DAC 0x01
++#define VBE_CAP_VGACOMPAT 0x02
++
++/* This struct is 512 bytes long */
++struct vesafb_vbe_ib {
++ char vbe_signature[4];
++ u16 vbe_version;
++ u32 oem_string_ptr;
++ u32 capabilities;
++ u32 mode_list_ptr;
++ u16 total_memory;
++ u16 oem_software_rev;
++ u32 oem_vendor_name_ptr;
++ u32 oem_product_name_ptr;
++ u32 oem_product_rev_ptr;
++ u8 reserved[222];
++ char oem_data[256];
++} __attribute__ ((packed));
++
++struct vesafb_crtc_ib {
++ u16 horiz_total;
++ u16 horiz_start;
++ u16 horiz_end;
++ u16 vert_total;
++ u16 vert_start;
++ u16 vert_end;
++ u8 flags;
++ u32 pixel_clock;
++ u16 refresh_rate;
++ u8 reserved[40];
++} __attribute__ ((packed));
++
++#define VBE_MODE_VGACOMPAT 0x20
++
++struct vesafb_mode_ib {
++ /* for all VBE revisions */
++ u16 mode_attr;
++ u8 winA_attr;
++ u8 winB_attr;
++ u16 win_granularity;
++ u16 win_size;
++ u16 winA_seg;
++ u16 winB_seg;
++ u32 win_func_ptr;
++ u16 bytes_per_scan_line;
++
++ /* for VBE 1.2+ */
++ u16 x_res;
++ u16 y_res;
++ u8 x_char_size;
++ u8 y_char_size;
++ u8 planes;
++ u8 bits_per_pixel;
++ u8 banks;
++ u8 memory_model;
++ u8 bank_size;
++ u8 image_pages;
++ u8 reserved1;
++
++ /* Direct color fields for direct/6 and YUV/7 memory models. */
++ /* Offsets are bit positions of lsb in the mask. */
++ u8 red_len;
++ u8 red_off;
++ u8 green_len;
++ u8 green_off;
++ u8 blue_len;
++ u8 blue_off;
++ u8 rsvd_len;
++ u8 rsvd_off;
++ u8 direct_color_info; /* direct color mode attributes */
++
++ /* for VBE 2.0+ */
++ u32 phys_base_ptr;
++ u8 reserved2[6];
++
++ /* for VBE 3.0+ */
++ u16 lin_bytes_per_scan_line;
++ u8 bnk_image_pages;
++ u8 lin_image_pages;
++ u8 lin_red_len;
++ u8 lin_red_off;
++ u8 lin_green_len;
++ u8 lin_green_off;
++ u8 lin_blue_len;
++ u8 lin_blue_off;
++ u8 lin_rsvd_len;
++ u8 lin_rsvd_off;
++ u32 max_pixel_clock;
++ u16 mode_id;
++ u8 depth;
++} __attribute__ ((packed));
++
++struct vesafb_pal_entry {
++ u_char blue, green, red, pad;
++} __attribute__ ((packed));
++
++struct vesafb_par {
++ u8 *vbe_state;
++ int vbe_state_size;
++ atomic_t ref_count;
++
++ u32 mem_total;
++ int mode_idx;
++ struct vesafb_crtc_ib crtc;
++};
++
+diff --git a/kernel/fork.c b/kernel/fork.c
+index fc723e5..dc8f93b 100644
+--- a/kernel/fork.c
++++ b/kernel/fork.c
+@@ -100,6 +100,7 @@ struct kmem_cache *fs_cachep;
+
+ /* SLAB cache for vm_area_struct structures */
+ struct kmem_cache *vm_area_cachep;
++EXPORT_SYMBOL_GPL(vm_area_cachep);
+
+ /* SLAB cache for mm_struct structures (tsk->mm) */
+ static struct kmem_cache *mm_cachep;
+@@ -399,6 +400,40 @@ void mmput(struct mm_struct *mm)
+ EXPORT_SYMBOL_GPL(mmput);
+
+ /**
++ * set_new_mm - allocate, init and activate a new mm for a kernel thread
++ */
++int set_new_mm(void)
++{
++ struct mm_struct *mm;
++ struct task_struct *tsk = current;
++ struct mm_struct *active_mm;
++
++ mm = mm_alloc();
++ if (!mm)
++ goto fail_nomem;
++ if (init_new_context(current,mm))
++ goto fail_nocontext;
++
++ task_lock(tsk);
++ tsk->flags |= PF_BORROWED_MM;
++ active_mm = tsk->active_mm;
++ current->mm = mm;
++ current->active_mm = mm;
++ activate_mm(active_mm, mm);
++ task_unlock(current);
++
++ /* Drop the previous active_mm */
++ mmdrop(active_mm);
++ return 0;
++
++fail_nocontext:
++ mmdrop(mm);
++fail_nomem:
++ return -EINVAL;
++}
++EXPORT_SYMBOL_GPL(set_new_mm);
++
++/**
+ * get_task_mm - acquire a reference to the task's mm
+ *
+ * Returns %NULL if the task has no mm. Checks PF_BORROWED_MM (meaning
+diff --git a/mm/memory.c b/mm/memory.c
+index 563792f..a9519ea 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -1193,6 +1193,7 @@ int zeromap_page_range(struct vm_area_struct *vma,
+ } while (pgd++, addr = next, addr != end);
+ return err;
+ }
++EXPORT_SYMBOL_GPL(zeromap_page_range);
+
+ pte_t * fastcall get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl)
+ {
+diff --git a/mm/mmap.c b/mm/mmap.c
+index 9717337..6fa5b1c 100644
+--- a/mm/mmap.c
++++ b/mm/mmap.c
+@@ -2024,6 +2024,7 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
+ vma_link(mm, vma, prev, rb_link, rb_parent);
+ return 0;
+ }
++EXPORT_SYMBOL_GPL(insert_vm_struct);
+
+ /*
+ * Copy the vma structure to a new location in the same mm,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-19 16:23:06 +0000