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d31d7cb146
linux-next/drivers/gpu/drm
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Chris Wilson d31d7cb146 drm/i915: Support for creating write combined type vmaps 
vmaps has a provision for controlling the page protection bits, with which
we can use to control the mapping type, e.g. WB, WC, UC or even WT.
To allow the caller to choose their mapping type, we add a parameter to
i915_gem_object_pin_map - but we still only allow one vmap to be cached
per object. If the object is currently not pinned, then we recreate the
previous vmap with the new access type, but if it was pinned we report an
error. This effectively limits the access via i915_gem_object_pin_map to a
single mapping type for the lifetime of the object. Not usually a problem,
but something to be aware of when setting up the object's vmap.

We will want to vary the access type to enable WC mappings of ringbuffer
and context objects on !llc platforms, as well as other objects where we
need coherent access to the GPU's pages without going through the GTT

v2: Remove the redundant braces around pin count check and fix the marker
     in documentation (Chris)

v3:
- Add a new enum for the vmalloc mapping type & pass that as an argument to
   i915_object_pin_map. (Tvrtko)
- Use PAGE_MASK to extract or filter the mapping type info and remove a
   superfluous BUG_ON.(Tvrtko)

v4:
- Rename the enums and clean up the pin_map function. (Chris)

v5: Drop the VM_NO_GUARD, minor cosmetics.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Akash Goel <akash.goel@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471001999-17787-1-git-send-email-chris@chris-wilson.co.uk
2016-08-12 13:06:36 +01:00
..
amd drm/amd/powerplay: remove enable_clock_power_gatings_tasks from initialize and resume events 2016-07-29 14:37:13 -04:00
arc drm/arc: Remove redundant dev_err call in arcpgu_load() 2016-07-19 15:33:50 -04:00
arm drm/arm: mali-dp: Fix error return code in malidp_bind() 2016-07-28 12:59:56 +02:00
armada drm/armada: make fbdev support really optional 2016-07-18 09:11:33 +02:00
ast Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
atmel-hlcdc Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
bochs Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
bridge Merge tag 'topic/drm-misc-2016-07-28' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-30 05:26:07 +10:00
cirrus Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
etnaviv drm/etnaviv: Optimize error handling in etnaviv_gem_new_userptr() 2016-07-22 13:51:49 -04:00
exynos GPU-DRM-Exynos: Delete an unnecessary check before the function call "vunmap" 2016-07-21 14:06:33 -04:00
fsl-dcu Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-27 10:33:08 +10:00
gma500 drm/gma500: remove unnecessary stub for fb_ioctl() 2016-07-28 10:04:03 +02:00
hisilicon drm/hisilicon: Fix ADE vblank on/off handling 2016-07-12 14:17:03 +02:00
i2c drm/i2c: adv7511: Move to bridge folder 2016-07-13 14:24:35 +05:30
i810
i915 drm/i915: Support for creating write combined type vmaps 2016-08-12 13:06:36 +01:00
imx imx-drm ldb mode set fix 2016-07-30 05:45:30 +10:00
mediatek Merge tag 'topic/drm-misc-2016-07-14' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-15 11:01:37 +10:00
mga
mgag200 drm/mgag200: Delete an unnecessary check before drm_gem_object_unreference_unlocked() 2016-07-22 11:23:39 -04:00
msm drm/msm: Delete an unnecessary check before drm_gem_object_unreference() 2016-07-16 10:29:35 -04:00
nouveau Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-27 10:33:08 +10:00
omapdrm GPU-DRM-OMAP: Delete unnecessary checks before two function calls 2016-07-22 10:27:59 +02:00
panel drm/panel: simple: Add support for Starry KR122EA0SRA panel 2016-07-11 14:30:43 +02:00
qxl drm/qxl: Delete an unnecessary check before drm_gem_object_unreference_unlocked() 2016-07-22 11:23:39 -04:00
r128
radeon drm/radeon: Remove deprecated create_singlethread_workqueue 2016-07-29 14:36:55 -04:00
rcar-du Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-27 10:33:08 +10:00
rockchip Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-27 10:33:08 +10:00
savage
shmobile drm/shmobile: make fbdev support really optional 2016-07-18 09:11:37 +02:00
sis drm: Move master pointer from drm_minor to drm_device 2016-06-21 21:43:24 +02:00
sti drm/sti: use new Reset API 2016-07-26 10:25:00 -04:00
sun4i Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-27 10:33:08 +10:00
tdfx
tegra Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
tilcdc drm/tilcdc: make fbdev support really optional 2016-07-18 09:11:38 +02:00
ttm drm/ttm: partial revert "cleanup ttm_tt_(unbind|destroy)" v3 2016-07-29 14:37:04 -04:00
udl drm/udl: make fbdev support really optional 2016-07-18 09:11:40 +02:00
vc4 Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc 2016-07-19 09:27:29 +02:00
vgem drm/vgem: Fix non static symbol warning 2016-07-19 15:01:52 +02:00
via drm: Move master pointer from drm_minor to drm_device 2016-06-21 21:43:24 +02:00
virtio drm/virtio: Fix non static symbol warning 2016-07-19 15:44:10 -04:00
vmwgfx Merge tag 'topic/drm-misc-2016-07-28' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-07-30 05:26:07 +10:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c drm/atomic-helpers: Clear up cleanup_done a bit 2016-06-15 17:25:36 +02:00
drm_atomic.c drm/atomic: Delete an unnecessary check before drm_property_unreference_blob() 2016-07-20 13:23:39 -04:00
drm_auth.c drm: document drm_auth.c 2016-06-21 22:10:55 +02:00
drm_bridge.c
drm_bufs.c drm: Move master pointer from drm_minor to drm_device 2016-06-21 21:43:24 +02:00
drm_cache.c drm: Restore double clflush on the last partial cacheline 2016-07-12 15:57:13 +02:00
drm_context.c
drm_crtc_helper.c Linux 4.7-rc5 2016-07-02 15:56:01 +10:00
drm_crtc_internal.h Revert "drm: Resurrect atomic rmfb code" 2016-07-14 15:18:15 +02:00
drm_crtc.c drm: drm_connector->s/connector_id/index/ for consistency 2016-07-19 21:51:17 +02:00
drm_debugfs.c drm: Nuke legacy maps debugfs files 2016-06-16 10:16:11 +02:00
drm_dma.c
drm_dp_aux_dev.c drm_aux-dev: fix error handling in drm_dp_aux_dev_init() 2016-07-12 14:10:57 +02:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm: aux ->transfer() can return 0, deal with it 2016-07-29 14:13:03 +10:00
drm_dp_mst_topology.c drm/dp-mst: Missing kernel doc 2016-07-19 10:31:53 +02:00
drm_drv.c drm: Do a full device unregister when unplugging 2016-07-12 13:01:49 +02:00
drm_edid_load.c
drm_edid.c
drm_encoder_slave.c
drm_fb_cma_helper.c Merge branch 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu into drm-next 2016-07-02 16:21:35 +10:00
drm_fb_helper.c drm/fb-helper: Reduce READ_ONCE(master) to lockless_dereference 2016-06-22 10:07:28 +02:00
drm_flip_work.c
drm_fops.c drm: Clean up drm_crtc.h 2016-06-21 21:43:28 +02:00
drm_fourcc.c drm: Move format-related helpers to drm_fourcc.c 2016-06-09 11:58:50 +02:00
drm_gem_cma_helper.c
drm_gem.c
drm_global.c
drm_hashtab.c
drm_info.c drm: Extract drm_is_current_master 2016-06-21 21:58:12 +02:00
drm_internal.h drm: Nuke SET_UNIQUE ioctl 2016-06-21 21:43:46 +02:00
drm_ioc32.c
drm_ioctl.c drm: Don't overwrite user ioctl arg unless requested 2016-07-14 10:12:50 +02:00
drm_irq.c drm: Extract&Document drm_irq.h 2016-07-19 10:29:47 +02:00
drm_kms_helper_common.c
drm_legacy.h drm: Hide hw.lock cleanup in filp->release better 2016-06-16 10:16:37 +02:00
drm_lock.c drm: Extract drm_is_current_master 2016-06-21 21:58:12 +02:00
drm_memory.c drm: Fix broken use of _PAGE_NO_CACHE on powerpc 2016-07-12 13:20:39 +02:00
drm_mipi_dsi.c drm/dsi: Make set_tear_scanline command consistent 2016-07-12 13:19:26 +02:00
drm_mm.c
drm_modes.c
drm_modeset_lock.c
drm_of.c
drm_panel.c
drm_pci.c drm: Nuke SET_UNIQUE ioctl 2016-06-21 21:43:46 +02:00
drm_plane_helper.c drm: Deal with rotation in drm_plane_helper_check_update() 2016-06-17 16:41:25 +02:00
drm_platform.c drm: Lobotomize set_busid nonsense for !pci drivers 2016-06-21 21:56:23 +02:00
drm_prime.c drm/prime: fix error path deadlock fail 2016-06-13 17:32:18 +02:00
drm_probe_helper.c
drm_rect.c
drm_scatter.c drm: Fix broken use of _PAGE_NO_CACHE on powerpc 2016-07-12 13:20:39 +02:00
drm_simple_kms_helper.c drm: Deal with rotation in drm_plane_helper_check_update() 2016-06-17 16:41:25 +02:00
drm_sysfs.c drm: Remove dev_pm_ops from drm_class 2016-06-09 08:43:25 +02:00
drm_trace_points.c
drm_trace.h
drm_vm.c drm: Fix broken use of _PAGE_NO_CACHE on powerpc 2016-07-12 13:20:39 +02:00
drm_vma_manager.c
Kconfig
Makefile drm: Add helper for simple display pipeline 2016-06-10 17:33:17 +02:00