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Ben Widawsky 06fda602db drm/i915: Create page table allocators ... As we move toward dynamic page table allocation, it becomes much easier to manage our data structures if break do things less coarsely by breaking up all of our actions into individual tasks. This makes the code easier to write, read, and verify. Aside from the dissection of the allocation functions, the patch statically allocates the page table structures without a page directory. This remains the same for all platforms, The patch itself should not have much functional difference. The primary noticeable difference is the fact that page tables are no longer allocated, but rather statically declared as part of the page directory. This has non-zero overhead, but things gain additional complexity as a result. This patch exists for a few reasons: 1. Splitting out the functions allows easily combining GEN6 and GEN8 code. Page tables have no difference based on GEN8. As we'll see in a future patch when we add the DMA mappings to the allocations, it requires only one small change to make work, and error handling should just fall into place. 2. Unless we always want to allocate all page tables under a given PDE, we'll have to eventually break this up into an array of pointers (or pointer to pointer). 3. Having the discrete functions is easier to review, and understand. All allocations and frees now take place in just a couple of locations. Reviewing, and catching leaks should be easy. 4. Less important: the GFP flags are confined to one location, which makes playing around with such things trivial. v2: Updated commit message to explain why this patch exists v3: For lrc, s/pdp.page_directory[i].daddr/pdp.page_directory[i]->daddr/ v4: Renamed free_pt/pd_single functions to unmap_and_free_pt/pd (Daniel) v5: Added additional safety checks in gen8 clear/free/unmap. v6: Use WARN_ON and return -EINVAL in alloc_pt_range (Mika). v7: Make err_out loop symmetrical to the way we allocate in alloc_pt_range. Also s/page_tables/page_table and correct commit message (Mika) Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Michel Thierry <michel.thierry@intel.com> (v3+) Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		10 years ago
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accessibility	…
acpi	Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	10 years ago
amba	Char/Misc driver patches for 3.19-rc1	10 years ago
android	…
ata	libata: prevent HSM state change race between ISR and PIO	10 years ago
atm	…
auxdisplay	…
base	Merge branches 'pm-domains', 'powercap' and 'pm-tools'	10 years ago
bcma	…
block	NVMe: Fix locking on abort handling	10 years ago
bluetooth	Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next	10 years ago
bus	drivers: bus: check cci device tree node status	10 years ago
cdrom	…
char	agp/intel: Serialise after GTT updates	10 years ago
clk	clk: fix possible null pointer dereference	10 years ago
clocksource	Fixes for 3.19	10 years ago
connector	…
coresight	…
cpufreq	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	10 years ago
cpuidle	Merge branches 'pm-cpufreq' and 'pm-cpuidle'	10 years ago
crypto	…
dca	…
devfreq	…
dio	…
dma	dmaengine: dw: balance PM runtime calls	10 years ago
dma-buf	…
edac	…
eisa	…
extcon	Char/Misc driver patches for 3.19-rc1	10 years ago
firewire	…
firmware	…
fmc	…
gpio	A slew of fixes dealing with some irritating bugs (non-regressions)	10 years ago
gpu	drm/i915: Create page table allocators	10 years ago
hid	HID: roccat: potential out of bounds in pyra_sysfs_write_settings()	10 years ago
hsi	* misc. fixes in omap-ssi and nokia-modem drivers	10 years ago
hv	Char/Misc driver patches for 3.19-rc1	10 years ago
hwmon	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	10 years ago
hwspinlock	…
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	10 years ago
ide	…
idle	…
iio	First round of IIO fixes for the 3.19 cycle.	10 years ago
infiniband	net/mlx4: Don't disable vxlan offloads under DMFS-A0 optimized steering	10 years ago
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	10 years ago
iommu	iommu/rockchip: Drop owner assignment from platform_drivers	10 years ago
ipack	…
irqchip	Merge branch 'irq-irqdomain-arm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	10 years ago
isdn	isdn: fix NUL (\0 or \x00) specification in string	10 years ago
leds	leds: netxbig: fix oops at probe time	10 years ago
lguest	…
macintosh	macintosh: therm_pm72: delete deprecated driver	10 years ago
mailbox	…
mcb	mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0	10 years ago
md	dm: fix missed error code if .end_io isn't implemented by target_type	10 years ago
media	More ACPI and power management updates for 3.19-rc1	10 years ago
memory	MTD updates for 3.19:	10 years ago
memstick	…
message	…
mfd	- Avoid platform ID collision in da9052	10 years ago
misc	Char/Misc driver fixes for 3.19-rc5	10 years ago
mmc	mmc: sdhci: Set SDHCI_POWER_ON with external vmmc	10 years ago
mtd	MTD updates for 3.19:	10 years ago
net	s2io: use snprintf() as a safety feature	10 years ago
nfc	More ACPI and power management updates for 3.19-rc1	10 years ago
ntb	…
nubus	…
of	ARM: SoC/iommu configuration for 3.19	10 years ago
oprofile	…
parisc	…
parport	Char/Misc driver patches for 3.19-rc1	10 years ago
pci	Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	10 years ago
pcmcia	Char/Misc driver patches for 3.19-rc1	10 years ago
phy	phy: phy-ti-pipe3: fix inconsistent enumeration of PCIe gen2 cards	10 years ago
pinctrl	pinctrl: qcom: Don't iterate past end of function array	10 years ago
platform	platform-drivers-x86 for 3.19	10 years ago
pnp	…
power	More ACPI and power management updates for 3.19-rc1	10 years ago
powercap	powercap / RAPL: add IDs for future Xeon CPUs	10 years ago
pps	…
ps3	…
ptp	…
pwm	pwm: Changes for v3.19-rc1	10 years ago
rapidio	…
ras	…
regulator	regulator: Fix for v3.19	10 years ago
remoteproc	…
reset	reset: sunxi: fix spinlock initialization	10 years ago
rpmsg	…
rtc	…
s390	s390/zcrypt: kernel oops at insmod of the z90crypt device driver	10 years ago
sbus	…
scsi	scsi: ->queue_rq can't sleep	10 years ago
sfi	…
sh	…
sn	…
soc	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	10 years ago
spi	Merge remote-tracking branches 'spi/fix/img-spfi' and 'spi/fix/msiof' into spi-linus	10 years ago
spmi	…
ssb	…
staging	staging: vt6655: fix sparse warning: argument type	10 years ago
target	iscsi-target: Fix typos in enum cmd_flags_table	10 years ago
tc	…
thermal	Merge branch 'thermal-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	10 years ago
thunderbolt	…
tty	serial: samsung: Add the support for Exynos5433 SoC	10 years ago
uio	Char/Misc driver patches for 3.19-rc1	10 years ago
usb	usb: fixes for v3.19-rc6	10 years ago
uwb	…
vfio	vfio-pci: Fix the check on pci device type in vfio_pci_probe()	10 years ago
vhost	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	10 years ago
video	fbdev/broadsheetfb: fix memory leak	10 years ago
virt	…
virtio	virtio_pci: document why we defer kfree	10 years ago
vlynq	…
vme	…
w1	Char/Misc driver patches for 3.19-rc1	10 years ago
watchdog	watchdog: imx2_wdt: Fix the argument of watchdog_active()	10 years ago
xen	Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus	10 years ago
zorro	…
Kconfig	Staging patches for 3.19-rc1	10 years ago
Makefile	drivers: Move iommu/ before gpu/ in Makefile	10 years ago