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Marek Olšák dfadbbdb57 drm/ttm: add a way to bo_wait for either the last read or last write 
Sometimes we want to know whether a buffer is busy and wait for it (bo_wait).
However, sometimes it would be more useful to be able to query whether
a buffer is busy and being either read or written, and wait until it's stopped
being either read or written. The point of this is to be able to avoid
unnecessary waiting, e.g. if a GPU has written something to a buffer and is now
reading that buffer, and a CPU wants to map that buffer for read, it needs to
only wait for the last write. If there were no write, there wouldn't be any
waiting needed.

This, or course, requires user space drivers to send read/write flags
with each relocation (like we have read/write domains in radeon, so we can
actually use those for something useful now).

Now how this patch works:

The read/write flags should passed to ttm_validate_buffer. TTM maintains
separate sync objects of the last read and write for each buffer, in addition
to the sync object of the last use of a buffer. ttm_bo_wait then operates
with one the sync objects.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-08-31 19:25:35 +01:00
..
accessibility
acpi Merge branch 'battery' into release 2011-08-05 22:16:42 -04:00
amba
ata drivers/ata/sata_dwc_460ex.c: add missing kfree 2011-08-18 23:58:11 -04:00
atm
auxdisplay
base Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2011-08-28 10:05:39 -07:00
bcma
block Merge branch 'stable/for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus 2011-08-09 20:43:26 +02:00
bluetooth
cdrom drivers/cdrom/cdrom.c: relax check on dvd manufacturer value 2011-08-02 12:43:50 +02:00
char drivers/char/msm_smd_pkt.c: don't use IS_ERR() 2011-08-25 16:25:33 -07:00
clk
clocksource
connector proc_fork_connector: a lockless ->real_parent usage is not safe 2011-07-28 18:26:32 -07:00
cpufreq
cpuidle cpuidle: stop depending on pm_idle 2011-08-03 19:06:37 -04:00
crypto n2_crypto: Attach on Niagara-T3. 2011-07-28 01:30:07 -07:00
dca
dio
dma Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-08-10 17:37:17 -07:00
edac i7core_edac: fixed typo in error count calculation 2011-08-18 14:07:15 -07:00
eisa eisa/pci_eisa.c: fix BUG introduced by 005bdad7b8 2011-08-04 06:32:51 -10:00
firewire Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-08-27 09:32:08 -07:00
firmware firmware: fix google/gsmi.c build warning 2011-08-08 13:53:49 -07:00
gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-08-01 06:13:48 -10:00
gpu drm/ttm: add a way to bo_wait for either the last read or last write 2011-08-31 19:25:35 +01:00
hid Merge branches 'wiimote' and 'upstream-fixes' into for-linus 2011-08-24 16:41:52 +02:00
hwmon hwmon: (i5k_amb) Drop i5k_channel_pci_id 2011-08-23 21:04:28 -07:00
hwspinlock
i2c i2c-nomadik: fix kerneldoc warning 2011-08-24 23:28:49 +01:00
ide drivers/ide/cy82c693.c: Add missing pci_dev_put 2011-08-04 01:30:34 -07:00
idle
ieee802154
infiniband Merge branches 'ipoib' and 'iser' into for-next 2011-08-17 10:57:43 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-08-24 09:19:03 -07:00
iommu
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-07-28 05:58:19 -07:00
leds drivers/leds/leds-bd2802.c: bd2802_unregister_led_classdev() should unregister all registered leds 2011-08-25 16:25:35 -07:00
lguest
macintosh
mca
md dm table: set flush capability based on underlying devices 2011-08-02 12:32:08 +01:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-07-30 00:08:53 -07:00
memstick
message Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-30 08:36:02 -10:00
mfd mfd: Fix mismatch in twl4030 mutex lock-unlock 2011-07-31 23:28:27 +02:00
misc Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-08-26 13:05:09 -07:00
mmc mmc: dw_mmc: Fix DDR mode support. 2011-08-13 14:50:32 -04:00
mtd
net rapidio: fix use of non-compatible registers 2011-08-25 16:25:34 -07:00
nfc
nubus
of Revert "dt: add of_alias_scan and of_alias_get_id" 2011-08-04 11:26:24 +01:00
oprofile
parisc
parport
pci pci: fix new kernel-doc warning in pci.c 2011-08-20 18:02:32 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2011-07-31 06:23:08 -10:00
platform acer-wmi: support Lenovo ideapad S205 wifi switch 2011-08-05 15:21:52 -04:00
pnp
power s3c-adc-battery: Fix compilation error due to missing header (module.h) 2011-08-19 21:01:46 +04:00
pps
ps3
ptp
rapidio rapidio: fix use of non-compatible registers 2011-08-25 16:25:34 -07:00
regulator Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6 2011-08-01 14:05:46 -10:00
rtc drivers/rtc/rtc-s3c.c: allow multiple open / allow no-ioctl-open'ed rtc to have irq. 2011-08-25 18:51:00 -07:00
s390 [S390] memory hotplug: only unassign assigned increments 2011-08-24 17:15:24 +02:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-30 08:36:02 -10:00
sfi
sh Merge branch 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x 2011-08-01 06:10:16 -10:00
sn
spi spi/pl022: remove function cannot exit 2011-08-02 14:54:11 +01:00
ssb
staging staging: tidspbridge: fix compilation on dsp clock functions 2011-08-24 14:35:26 -07:00
target target: Convert acl_node_lock to be IRQ-disabling 2011-08-22 19:28:36 +00:00
tc
telephony
thermal thermal: make THERMAL_HWMON implementation fully internal 2011-08-02 14:51:57 -04:00
tty Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2011-08-28 10:05:39 -07:00
uio
usb USB: ftdi_sio: add Calao reference board support 2011-08-25 09:44:50 -07:00
uwb
vhost
video backlight: fix module alias prefix for adp8870_bl 2011-08-25 16:25:34 -07:00
virt
virtio
vlynq
w1 MAINTAINERS: Evgeniy has moved 2011-08-25 16:25:33 -07:00
watchdog watchdog: Cleanup WATCHDOG_CORE help text 2011-08-02 08:23:07 +00:00
xen xen: self-balloon needs module.h 2011-08-16 07:23:34 -07:00
zorro
Kconfig
Makefile