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Chris Wilson f0c8602464 Revert "drm/i915: Don't save/restore hardware status page address register" 
This reverts commit a7a75c8f70.

There are two different variations on how Intel hardware addresses the
"Hardware Status Page". One as a location in physical memory and the
other as an offset into the virtual memory of the GPU, used in more
recent chipsets. (The HWS itself is a cacheable region of memory which
the GPU can write to without requiring CPU synchronisation, used for
updating various details of hardware state, such as the position of
the GPU head in the ringbuffer, the last breadcrumb seqno, etc).

These two types of addresses were updated in different locations of code
- one inline with the ringbuffer initialisation, and the other during
device initialisation. (The HWS page is logically associated with
the rings, and there is one HWS page per ring.) During resume, only the
ringbuffers were being re-initialised along with the virtual HWS page,
leaving the older physical address HWS untouched. This then caused a
hang on the older gen3/4 (915GM, 945GM, 965GM) the first time we tried
to synchronise the GPU as the breadcrumbs were never being updated.

Reported-and-tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Jan Niehusmann <jan@gondor.com>
Reported-and-tested-by: Justin P. Mattock <justinmattock@gmail.com>
Reported-and-tested-by: Michael "brot" Groh <brot@minad.de>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
 		2011-03-24 07:15:01 +00:00
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accessibility
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acpi ACPI / ACPICA: Implicit notify for multiple devices 2011-02-24 19:59:21 +01:00
amba
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ata libata: set queue DMA alignment to sector size for ATAPI too 2011-01-28 03:16:20 -05:00
atm ATM, Solos PCI ADSL2+: Don't deref NULL pointer if net_ratelimit() and alloc_skb() interact badly. 2011-02-13 16:55:46 -08:00
auxdisplay
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base PM / Runtime: Don't enable interrupts while running in_interrupt 2011-01-25 20:50:07 +01:00
block block: kill loop_mutex 2011-03-03 11:53:25 -05:00
bluetooth Revert "Bluetooth: Enable USB autosuspend by default on btusb" 2011-02-23 19:42:03 -08:00
cdrom cdrom: support devices that have check_events but not media_changed 2011-02-09 14:22:37 +01:00
char ipmi: Fix IPMI errors due to timing problems 2011-03-10 13:21:16 -08:00
clk
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clocksource drivers/clocksource/tcb_clksrc.c: fix init sequence 2011-01-26 10:50:04 +10:00
connector
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cpufreq [CPUFREQ] fix BUG on cpufreq policy init failure 2011-03-01 18:49:44 -05:00
cpuidle Merge branch 'cpuidle-perf-events' into idle-test 2011-01-12 18:06:19 -05:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2011-01-13 10:25:58 -08:00
dca dca: remove unneeded NULL check 2011-01-13 08:03:09 -08:00
dio
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dma Merge branch 'imx' into dmaengine-fixes 2011-02-14 02:40:46 -08:00
edac amd64_edac: Fix DIMMs per DCTs output 2011-02-10 14:41:49 +01:00
eisa
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firewire Merge branches 'fixes' and 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-01-21 13:34:39 -08:00
firmware x86, dmi, debug: Log board name (when present) in dmesg/oops output 2011-02-15 04:20:57 +01:00
gpio drivers/gpio/pca953x.c: add a mutex to fix race condition 2011-02-11 16:12:20 -08:00
gpu Revert "drm/i915: Don't save/restore hardware status page address register" 2011-03-24 07:15:01 +00:00
hid kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
hwmon hwmon: (adt7411) add MODULE_DEVICE_TABLE 2011-02-26 08:59:32 -08:00
i2c i2c-eg20t: include slab.h for memory allocations 2011-03-08 23:13:30 +00:00
ide kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
idle intel_idle: disable Atom/Lincroft HW C-state auto-demotion 2011-02-17 17:08:48 -05:00
ieee802154
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infiniband Merge branches 'nes' and 'qib' into for-next 2011-02-17 14:04:59 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-02-23 14:44:25 -08:00
isdn drivers:isdn:istream.c Fix typo pice to piece 2011-02-28 12:07:32 -08:00
leds leds: leds-pwm: return proper error if pwm_request failed 2011-01-26 10:49:58 +10:00
lguest lguest: compile fixes 2011-01-20 21:37:29 +10:30
macintosh powerpc/macintosh: Fix wrong test in fan_{read,write}_reg() 2011-01-21 14:08:34 +11:00
mca
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md md: Fix - again - partition detection when array becomes active 2011-02-24 17:26:41 +11:00
media Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-03-10 13:22:10 -08:00
memstick workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable' 2011-02-16 17:48:59 +01:00
message [SCSI] mptfusion: Bump version 03.04.18 2011-02-12 12:51:21 -06:00
mfd mfd: Avoid tps6586x burst writes 2011-03-02 10:57:50 +01:00
misc drivers/misc/bmp085.c: add MODULE_DEVICE_TABLE 2011-03-04 17:53:38 -08:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc 2011-03-09 14:00:44 -08:00
mtd workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable' 2011-02-16 17:48:59 +01:00
net r8169: disable ASPM 2011-03-03 11:55:43 -08:00
nfc drivers/nfc/pn544.c: add missing regulator 2011-02-25 15:07:36 -08:00
nubus
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of of/promtree: allow DT device matching by fixing 'name' brokenness (v5) 2011-03-02 13:45:19 -07:00
oprofile
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parisc
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parport parport: make lockdep happy with waitlist_lock 2011-01-26 10:49:59 +10:00
pci pci: use security_capable() when checking capablities during config space read 2011-02-15 19:06:31 +11:00
pcmcia Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-03-07 20:45:42 -08:00
platform dell-laptop: Toggle the unsupported hardware killswitch 2011-02-21 17:06:21 -05:00
pnp Merge branch 'pnp' into release 2011-01-12 04:59:44 -05:00
power Merge git://git.infradead.org/battery-2.6 2011-01-14 09:25:59 -08:00
pps pps: make pps_gen_parport depend on BROKEN 2011-03-04 17:53:38 -08:00
ps3
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rapidio rapidio: fix sysfs config attribute to access 16MB of maint space 2011-02-25 15:07:37 -08:00
regulator regulator, mc13xxx: Remove pointless test for unsigned less than zero 2011-02-25 08:51:07 +00:00
rtc drivers/rtc/rtc-s3c.c: fix prototype for s3c_rtc_setaie() 2011-03-04 17:53:38 -08:00
s390 [S390] tape: deadlock on system work queue 2011-03-03 17:56:14 +01:00
sbus
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scsi block: add @force_kblockd to __blk_run_queue() 2011-03-02 08:48:05 -05:00
sfi SFI: use ioremap_cache() instead of ioremap() 2011-01-11 23:27:25 -05:00
sh sh: update INTC to clear IRQ sense valid flag 2011-01-19 19:02:35 +09:00
sn
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spi spi/pxa2xx pci: fix the release - remove race 2011-02-15 13:25:36 -07:00
ssb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2011-02-08 12:03:54 -08:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-02-10 12:19:23 -08:00
target [SCSI] target: fix use after free detected by SLUB poison 2011-02-12 12:32:41 -06:00
tc
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telephony Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-01-13 10:05:56 -08:00
thermal ACPI: Fix build for CONFIG_NET unset 2011-02-28 18:00:31 -08:00
tty fmvj18x_cs: add new id 2011-02-28 12:06:20 -08:00
uio
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usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2011-03-03 15:43:15 -08:00
uwb
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vhost vhost: rcu annotation fixup 2011-02-01 16:48:46 +02:00
video drivers/video/backlight/ltv350qv.c: fix a memory leak 2011-03-04 17:53:38 -08:00
virtio virtio: remove virtio-pci root device 2011-01-20 21:37:30 +10:30
vlynq
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w1 drivers/w1/masters/omap_hdq.c: add missing clk_put 2011-02-11 16:12:20 -08:00
watchdog watchdog: sbc_fitpc2_wdt, fix crash on systems without DMI_BOARD_NAME 2011-03-09 21:33:37 +00:00
xen xen: suspend and resume system devices when running PVHVM 2011-02-17 10:31:20 +00:00
zorro
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Kconfig [SCSI] target: Add LIO target core v4.0.0-rc6 2011-01-14 10:12:29 -06:00
Makefile Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-01-20 16:39:23 -08:00