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
ACPI: export acpi_pci_root and friends
2009-09-09 13:29:22 -07:00
ata_piix: parallel scanning on PATA needs an extra locking
2009-08-31 17:25:00 -10:00
PM / Driver Core: Kill dev_pm_ops platform warning for now
2009-08-10 23:41:18 +02:00
aoe: allocate unused request_queue for sysfs
2009-09-09 14:10:18 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel
2009-09-07 11:38:30 -07:00
sh: CMT suspend/resume
2009-08-15 12:58:45 +09:00
[CPUFREQ] Re-enable cpufreq suspend and resume code
2009-09-01 12:45:08 -04:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
2009-07-30 16:46:31 -07:00
amd64_edac: print debug statements only on error
2009-08-04 12:10:06 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
2009-09-05 14:59:00 -07:00
PCI/GPU: implement VGA arbitration on Linux
2009-09-09 13:29:36 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2009-07-22 09:30:07 -07:00
hwmon: (asus_atk0110) Fix upper limit readings
2009-07-28 16:31:39 +02:00
i2c-stu300: I2C STU300 stability updates
2009-08-20 22:27:58 +01:00
pcmcia: add CNF-CDROM-ID for ide
2009-08-14 13:09:32 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2009-09-05 13:41:29 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2009-08-04 15:38:34 -07:00
leds: after setting inverted attribute, we must update the LED
2009-08-26 20:06:53 -07:00
lguest and virtio: cleanup struct definitions to Linux style.
2009-07-30 16:03:46 +09:30
m68k: count can reach 51, not 50
2009-08-26 23:14:49 +02:00
dm snapshot: fix on disk chunk size validation
2009-09-04 20:40:43 +01:00
V4L/DVB (12502): gspca - sn9c20x: Fix gscpa sn9c20x build errors.
2009-08-31 02:24:54 -03:00
mfd: twl4030 irq fixes
2009-08-04 20:31:32 +02:00
cb710: use SG_MITER_TO_SG/SG_MITER_FROM_SG
2009-07-31 12:28:46 +02:00
drivers/mmc: correct error-handling code
2009-08-07 10:39:56 -07:00
mtd: nftl: fix offset alignments
2009-09-03 14:59:16 +01:00
gianfar: Fix build.
2009-09-06 01:41:24 -07:00
of/mdio: Add support function for Ethernet fixed-link property
2009-07-22 09:27:18 -07:00
parisc: hppb.c - fix printk format strings
2009-08-02 15:42:39 +02:00
PCI/GPU: implement VGA arbitration on Linux
2009-09-09 13:29:36 -07:00
yenta: Use pci_claim_resource
2009-09-09 13:29:19 -07:00
toshiba_acpi: return on a fail path
2009-08-28 15:17:07 -04:00
Merge git://git.infradead.org/users/cbou/battery-2.6.31
2009-07-30 16:45:53 -07:00
pps: fix incorrect verdict check
2009-08-26 20:06:52 -07:00
rtc: mark if rtc-cmos drivers were successfully registered
2009-07-29 19:10:35 -07:00
[S390] drivers/s390: put NULL test before dereference
2009-08-23 18:10:00 +02:00
[SCSI] mpt2sas: fix config request and diag reset deadlock
2009-08-14 09:16:05 -05:00
ARM: S3C64XX: serial: Fix a typo in Kconfig
2009-08-14 00:43:46 +01:00
spi_s3c24xx: fix transfer setup code
2009-08-18 16:31:13 -07:00
Staging: rspiusb: Fix buffer overflow
2009-08-07 16:12:03 -07:00
thermal_sys: check get_temp return value
2009-08-26 20:06:52 -07:00
USB: fix oops on disconnect in cdc-acm
2009-08-07 16:05:14 -07:00
PCI/GPU: implement VGA arbitration on Linux
2009-09-09 13:29:36 -07:00
virtio: refactor find_vqs
2009-07-30 16:03:45 +09:30
drivers/w1/masters/omap_hdq.c: fix missing mutex unlock
2009-08-07 10:39:55 -07:00
[WATCHDOG] ar7_wdt: fix path to ar7-specific headers
2009-08-15 13:05:01 +00:00
deb2d2ecd4