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linux/drivers/video
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Benjamin Herrenschmidt deb2d2ecd4 PCI/GPU: implement VGA arbitration on Linux 
Background:
Graphic devices are accessed through ranges in I/O or memory space. While most
modern devices allow relocation of such ranges, some "Legacy" VGA devices
implemented on PCI will typically have the same "hard-decoded" addresses as
they did on ISA. For more details see "PCI Bus Binding to IEEE Std 1275-1994
Standard for Boot (Initialization Configuration) Firmware Revision 2.1"
Section 7, Legacy Devices.

The Resource Access Control (RAC) module inside the X server currently does
the task of arbitration when more than one legacy device co-exists on the same
machine. But the problem happens when these devices are trying to be accessed
by different userspace clients (e.g. two server in parallel). Their address
assignments conflict. Therefore an arbitration scheme _outside_ of the X
server is needed to control the sharing of these resources. This document
introduces the operation of the VGA arbiter implemented for Linux kernel.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-09-09 13:29:36 -07:00
..
aty atyfb: fix alignment for block writes 2009-06-30 18:56:01 -07:00
backlight drivers/video/backlight/jornada720_bl.c: fix build 2009-07-29 19:10:35 -07:00
console fbcon: don't use vc_resize() on initialization 2009-08-07 10:39:56 -07:00
display device create: video: convert device_create_drvdata to device_create 2008-10-16 09:24:45 -07:00
geode gx1fb: properly alloc cmap and plug cmap leak 2009-02-11 14:25:34 -08:00
i810 i810fb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-08 09:19:49 -07:00
intelfb intelfb: fix a bug when changing video timing 2009-06-16 19:48:00 -07:00
kyro
logo fbdev: move logo externs to header file 2009-06-16 19:47:57 -07:00
matrox Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
mb862xx mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF 2009-06-16 19:47:59 -07:00
mbx
nvidia nvidiafb: fix boot-time printk string 2009-06-23 12:50:05 -07:00
omap omap: video: remove direct access of driver_data 2009-07-12 13:02:10 -07:00
pnx4008 [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
riva
savage i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
sis sisfb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-06 13:44:37 -07:00
vermilion removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
via viafb: fix rmmod bug 2009-08-07 10:39:56 -07:00
68328fb.c 68328fb: fix cmap memory leaks 2009-04-01 08:59:31 -07:00
acornfb.c acornfb: remove fb_mmap function 2009-06-16 19:47:59 -07:00
acornfb.h
amba-clcd.c Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
amifb.c amifb: check fb_alloc_cmap return value and handle failure properly 2009-04-01 08:59:31 -07:00
arcfb.c
arkfb.c arkfb: fix misplaced parentheses 2009-04-01 08:59:32 -07:00
asiliantfb.c asiliantfb: add missing return statement 2009-04-21 13:41:47 -07:00
atafb_iplan2p2.c
atafb_iplan2p4.c
atafb_iplan2p8.c
atafb_mfb.c
atafb_utils.h
atafb.c atafb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-08 09:19:49 -07:00
atafb.h
atmel_lcdfb.c atmel_lcdfb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-08 14:18:35 -07:00
au1100fb.c platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver' 2009-03-24 16:38:25 -07:00
au1100fb.h
au1200fb.c platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver' 2009-03-24 16:38:25 -07:00
au1200fb.h
bf54x-lq043fb.c fbdev: bf54x-lq043fb: use kzalloc over kmalloc/memset 2009-06-16 19:48:03 -07:00
bfin-t350mcqb-fb.c fbdev: *bfin*: fix __dev{init,exit} markings 2009-06-16 19:48:03 -07:00
broadsheetfb.c [ARM] 5353/1: fbdev: add E-Ink Broadsheet controller support v3 2009-02-10 11:27:59 +00:00
bt431.h
bt455.h
bw2.c bw2: use standard fields for framebuffer physical address and length 2009-06-16 04:56:30 -07:00
c2p_core.h fbdev: c2p/atafb - Add support for Atari interleaved bitplanes 2009-01-12 20:56:31 +01:00
c2p_iplan2.c fbdev: c2p/atafb - Add support for Atari interleaved bitplanes 2009-01-12 20:56:31 +01:00
c2p_planar.c fbdev: c2p - Rename c2p to c2p_planar 2009-01-12 20:56:32 +01:00
c2p.h fbdev: c2p - Rename c2p to c2p_planar 2009-01-12 20:56:32 +01:00
carminefb_regs.h fbdev: add the carmine FB driver 2008-07-24 10:47:34 -07:00
carminefb.c carminefb: fix possible access beyond end of carmine_modedb[] 2009-06-16 19:47:59 -07:00
carminefb.h fbdev: add the carmine FB driver 2008-07-24 10:47:34 -07:00
cfbcopyarea.c
cfbfillrect.c fbdev: fix fillrect for 24bpp modes 2009-05-06 16:36:10 -07:00
cfbimgblt.c
cg3.c cg3: use standard fields for framebuffer physical address and length 2009-06-16 04:56:34 -07:00
cg6.c cg6: use standard fields for framebuffer physical address and length 2009-06-16 04:56:35 -07:00
cg14.c cg14: use standard fields for framebuffer physical address and length 2009-06-16 04:56:31 -07:00
chipsfb.c chipsfb: remove redundant assignment 2009-06-16 19:47:58 -07:00
cirrusfb.c cirrusfb: do not allow unsupported pixel depth 2009-04-13 15:04:30 -07:00
clps711xfb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
cobalt_lcdfb.c Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
controlfb.c powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED 2008-12-21 14:21:16 +11:00
controlfb.h
cyber2000fb.c cyber2000fb.c: use proper method for stopping unload if CONFIG_ARCH_SHARK 2009-06-12 21:46:53 +09:30
cyber2000fb.h
dnfb.c
edid.h
efifb.c fbdev: add support for handoff from firmware to hw framebuffers 2009-06-16 19:48:00 -07:00
epson1355fb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
fb_ddc.c
fb_defio.c mm: page_mkwrite change prototype to match fault 2009-04-01 08:59:14 -07:00
fb_draw.h fbdev: fix fillrect for 24bpp modes 2009-05-06 16:36:10 -07:00
fb_notify.c
fb_sys_fops.c
fbcmap.c fbmem: don't call copy_from/to_user() with mutex held 2009-02-05 12:56:46 -08:00
fbcvt.c
fbmem.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
fbmon.c fbmon: work around compiler bug in gcc-2.4.2 2009-07-22 08:49:22 -07:00
fbsysfs.c Revert "fb: Initialize fb_info mutexes in framebuffer_alloc()" 2009-07-08 09:20:11 -07:00
ffb.c sparc: Annotate of_device_id arrays with const or __initdata. 2008-08-31 01:23:17 -07:00
fm2fb.c
fsl-diu-fb.c fsl-diu-fb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-08 14:18:35 -07:00
fsl-diu-fb.h
g364fb.c
gbefb.c MIPS: gbe: Make needlessly global symbols static in drivers/video/gbefb.c 2009-05-14 13:50:25 +01:00
gxt4500.c pci: use pci_ioremap_bar() in drivers/video 2009-01-06 15:59:26 -08:00
hecubafb.c
hgafb.c hgafb: convert to new platform driver API 2008-07-24 10:47:39 -07:00
hitfb.c video: hitfb: Move over to dev_pm_ops. 2009-07-07 11:50:57 +09:00
hpfb.c
igafb.c igafb: use framebuffer_alloc() to allocate fb_info struct 2009-06-16 19:47:58 -07:00
imsttfb.c
imxfb.c imxfb: Fix TFT mode 2009-03-27 14:51:15 +01:00
Kconfig PCI/GPU: implement VGA arbitration on Linux 2009-09-09 13:29:36 -07:00
leo.c leo: use standard fields for framebuffer physical address and length 2009-06-16 04:56:37 -07:00
macfb.c macfb annotations and compiler warning fix 2008-12-28 20:00:05 +01:00
macmodes.c
macmodes.h
Makefile fb: add support of LCD display controller on pxa168/910 (base layer) 2009-06-13 00:09:09 +08:00
maxinefb.c
metronomefb.c metronomefb: Fix warning when building 64bit 2008-10-15 10:19:51 -07:00
modedb.c fbdev: add video modes for resolutions and timings of PAL RGB 2009-06-16 19:47:58 -07:00
mx3fb.c i.MX31: fix framebuffer locking regressions 2009-08-07 10:39:56 -07:00
n411.c
neofb.c neofb: fix sparse warnings 2009-01-06 15:59:27 -08:00
offb.c fbdev: use framebuffer_release() for freeing fb_info structures 2009-06-16 19:48:00 -07:00
output.c video: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:35 -08:00
p9100.c p9100: use standard fields for framebuffer physical address and length 2009-06-16 04:56:38 -07:00
platinumfb.c fbdev: add mutex for fb_mmap locking 2009-06-30 18:56:00 -07:00
platinumfb.h
pm2fb.c fbdev: use framebuffer_release() for freeing fb_info structures 2009-06-16 19:48:00 -07:00
pm3fb.c pm3fb: fix sparse warning 2009-01-06 15:59:27 -08:00
pmag-aa-fb.c
pmag-ba-fb.c video: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
pmagb-b-fb.c video: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
ps3fb.c ps3fb: Use ps3_system_bus_[gs]et_drvdata() instead of direct access 2009-06-15 16:47:25 +10:00
pvr2fb.c sh: dma: Make PVR2 DMA configurable. 2009-03-17 09:30:36 +09:00
pxa168fb.c fb: add support of LCD display controller on pxa168/910 (base layer) 2009-06-13 00:09:09 +08:00
pxa168fb.h fb: add support of LCD display controller on pxa168/910 (base layer) 2009-06-13 00:09:09 +08:00
pxafb.c fbdev: add mutex for fb_mmap locking 2009-06-30 18:56:00 -07:00
pxafb.h [ARM] pxafb: add support for overlay1 and overlay2 as framebuffer devices 2008-12-29 18:00:04 +08:00
q40fb.c
s1d13xxxfb.c fbdev: s1d13xxxfb: add accelerated bitblt functions 2009-06-16 19:48:00 -07:00
s3c2410fb.c s3c-fb: CPUFREQ frequency scaling support 2009-06-16 19:47:59 -07:00
s3c2410fb.h s3c-fb: CPUFREQ frequency scaling support 2009-06-16 19:47:59 -07:00
s3c-fb.c s3c-fb: fix off-by-one bug in loop indexes 2009-07-29 19:10:34 -07:00
s3fb.c s3fb: fix color component length for pseudocolor modes 2009-04-13 15:04:29 -07:00
sa1100fb.c sa1100fb: fix color component length for pseudocolor modes 2009-04-13 15:04:29 -07:00
sa1100fb.h sa1100fb: fix color component length for pseudocolor modes 2009-04-13 15:04:29 -07:00
sbuslib.c
sbuslib.h
sgivwfb.c drivers/video/sgivwfb.c: fix memory leaks in removal path 2009-04-01 08:59:30 -07:00
sh7760fb.c fbdev: add mutex for fb_mmap locking 2009-06-30 18:56:00 -07:00
sh_mobile_lcdcfb.c sh: skip disabled LCDC channels 2009-08-15 12:58:42 +09:00
skeletonfb.c fbdev: fix color component field length documentation 2009-04-13 15:04:29 -07:00
sm501fb.c sm501fb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-09 20:44:44 -07:00
sstfb.c sstfb: check fb_alloc_cmap return value and handle failure properly 2009-04-01 08:59:30 -07:00
sticore.h video/console/stico{n,re}.c: make code static 2008-07-26 12:00:12 -07:00
stifb.c Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
sunxvr500.c sunxvr500: fix cmap memory leaks 2009-04-01 08:59:31 -07:00
sunxvr2500.c
svgalib.c
syscopyarea.c
sysfillrect.c fbdev: fix fillrect for 24bpp modes 2009-05-06 16:36:10 -07:00
sysimgblt.c
tcx.c tcx: use standard fields for framebuffer physical address and length 2009-06-16 19:48:00 -07:00
tdfxfb.c i2c: Do not probe for TV chips on Voodoo3 adapters 2009-06-15 18:01:48 +02:00
tgafb.c tgafb: fix cmap memory leak 2009-04-01 08:59:31 -07:00
tmiofb.c video: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
tridentfb.c tridentfb: delete acceleration Kconfig option 2009-04-01 08:59:34 -07:00
uvesafb.c uvesafb: improve parameter handling. 2009-06-12 21:46:59 +09:30
valkyriefb.c valkyriefb: check fb_alloc_cmap return value and handle failure properly 2009-04-01 08:59:31 -07:00
valkyriefb.h
vesafb.c fbdev: add support for handoff from firmware to hw framebuffers 2009-06-16 19:48:00 -07:00
vfb.c fbdev: fix color component field length documentation 2009-04-13 15:04:29 -07:00
vga16fb.c vga16fb: remove open_lock mutex 2008-10-16 11:21:42 -07:00
vgastate.c
vt8623fb.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
w100fb.c w100fb: fix regression with uninitalized fb_info->mm_lock mutex 2009-07-08 09:19:49 -07:00
w100fb.h
xen-fbfront.c xenfb: connect to backend before registering fb 2009-08-27 12:31:18 -07:00
xilinxfb.c fbdev/xilinxfb: Fix improper casting and tighen up probe path 2009-06-17 00:30:02 -06:00