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0f46daa1a2
linux/drivers/gpu/drm
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Chris Wilson 0f46daa1a2 drm/i915: Force CPU synchronisation even if userspace requests ASYNC 
The goal here was to minimise doing any thing or any check inside the
kernel that was not strictly required. For a userspace that assumes
complete control over the cache domains, the kernel is usually using
outdated information and may trigger clflushes where none were
required.

However, swapping is a situation where userspace has no knowledge of the
domain transfer, and will leave the object in the CPU cache. The kernel
must flush this out to the backing storage prior to use with the GPU. As
we use an asynchronous task tracked by an implicit fence for this, we
also need to cancel the ASYNC flag on the object so that the object will
wait for the clflush to complete before being executed. This also absolves
userspace of the responsibility imposed by commit 77ae995789 ("drm/i915:
Enable userspace to opt-out of implicit fencing") that its needed to ensure
that the object was out of the CPU cache prior to use on the GPU.

Fixes: 77ae995789 ("drm/i915: Enable userspace to opt-out of implicit fencing")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101571
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-5-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-07-27 09:39:00 +02:00
..
amd Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
arc drm: Convert atomic drivers from CRTC .disable() to .atomic_disable() 2017-06-30 14:53:15 +02:00
arm drm/mali: Use new atomic iterator macros 2017-07-13 09:54:12 +02:00
armada drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
ast drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
atmel-hlcdc drm/atmel-hlcdc: Handle drm_atomic_helper_swap_state failure 2017-07-26 13:22:41 +02:00
bochs drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
bridge Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
cirrus drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
etnaviv main drm pull for v4.13 2017-07-09 18:48:37 -07:00
exynos drm/atomic: implement drm_atomic_helper_commit_tail for runtime_pm users 2017-07-26 13:45:08 +02:00
fsl-dcu drm: Add old state pointer to CRTC .enable() helper function 2017-06-30 14:53:14 +02:00
gma500 drm/gma500: remove an unneeded NULL check 2017-06-28 19:17:38 +02:00
hisilicon drm/hisilicon: fix build error without fbdev emulation 2017-07-26 13:45:09 +02:00
i2c drm: handle HDMI 2.0 VICs in AVI info-frames 2017-07-14 21:23:54 +03:00
i810 drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
i915 drm/i915: Force CPU synchronisation even if userspace requests ASYNC 2017-07-27 09:39:00 +02:00
imx Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
lib
mediatek drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
meson drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
mga Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
mgag200 drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
msm drm/msm: Handle drm_atomic_helper_swap_state failure 2017-07-26 13:22:42 +02:00
mxsfb drm/mxsfb: Use gem_free_object_unlocked 2017-07-18 08:40:54 +02:00
nouveau Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
omapdrm drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
panel drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
pl111 drm/pl111: Use gem_free_object_unlocked 2017-07-18 08:40:54 +02:00
qxl drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
r128 drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
radeon Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
rcar-du drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
rockchip drm/atomic: implement drm_atomic_helper_commit_tail for runtime_pm users 2017-07-26 13:45:08 +02:00
savage drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
selftests
shmobile drm/shmob: Drop drm_vblank_cleanup 2017-06-22 08:41:15 +02:00
sis drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
sti drm: handle HDMI 2.0 VICs in AVI info-frames 2017-07-14 21:23:54 +03:00
stm drm/stm: ltdc: Add panel-bridge support 2017-07-18 12:06:42 +05:30
sun4i drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
tdfx drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
tegra drm/tegra: Handle drm_atomic_helper_swap_state failure 2017-07-26 13:22:42 +02:00
tilcdc drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
tinydrm drm/tinydrm: Add RePaper e-ink driver 2017-07-14 19:30:08 +02:00
ttm drm/ttm: Fix use-after-free in ttm_bo_clean_mm 2017-07-03 16:25:43 -04:00
udl drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
vc4 Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
vgem drm/vgem: add compat_ioctl support 2017-07-17 21:08:31 +02:00
via drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
virtio drm/<drivers>: Drop fbdev info flags 2017-07-26 13:22:40 +02:00
vmwgfx Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
zte drm/zte: Use gem_free_object_unlocked 2017-07-18 08:40:54 +02:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c Merge airlied/drm-next into drm-intel-next-queued 2017-07-27 09:33:49 +02:00
drm_atomic.c drm: rename, adjust and export drm_atomic_replace_property_blob 2017-07-14 15:53:06 +02:00
drm_auth.c
drm_blend.c
drm_bridge.c
drm_bufs.c switch compat_drm_mapbufs() to drm_ioctl_kernel() 2017-07-04 13:16:26 -04:00
drm_cache.c
drm_color_mgmt.c drm: More links for gamma support helpers 2017-06-20 12:13:11 +02:00
drm_connector.c Linux 4.12-rc7 2017-06-27 08:28:30 +10:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c
drm_crtc_internal.h
drm_crtc.c
drm_debugfs_crc.c drm/crc: Only open CRC on atomic drivers when the CRTC is active. 2017-07-17 16:34:51 +02:00
drm_debugfs.c
drm_dma.c
drm_dp_aux_dev.c drm_dp_aux_dev: switch to read_iter/write_iter 2017-07-08 20:51:46 -04:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c
drm_dp_mst_topology.c Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
drm_drv.c drm: inhibit drm drivers register to uninitialized drm core 2017-07-11 12:03:11 +02:00
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c drm/edid: parse ycbcr 420 deep color information 2017-07-14 21:23:54 +03:00
drm_encoder_slave.c
drm_encoder.c
drm_fb_cma_helper.c drm: Convert CMA fbdev console suspend helpers to use bool 2017-06-20 16:23:40 +02:00
drm_fb_helper.c drm/fb-helper: Support deferred setup 2017-07-26 13:45:07 +02:00
drm_file.c Merge remote-tracking branch 'airlied/drm-next' into drm-misc-next 2017-06-27 09:18:17 -04:00
drm_flip_work.c
drm_fourcc.c
drm_framebuffer.c Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_gem_cma_helper.c drm: Update docs around gem_free_object 2017-07-26 13:22:39 +02:00
drm_gem.c drm: Don't complain too much about struct_mutex. 2017-07-18 09:17:22 +02:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_ioc32.c Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_ioctl.c Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_irq.c
drm_kms_helper_common.c
drm_legacy.h switch compat_drm_mapbufs() to drm_ioctl_kernel() 2017-07-04 13:16:26 -04:00
drm_lock.c
drm_memory.c
drm_mipi_dsi.c drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
drm_mm.c
drm_mode_config.c
drm_mode_object.c
drm_modes.c drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
drm_modeset_helper.c
drm_modeset_lock.c drm: Improve kerneldoc for drm_modeset_lock 2017-07-26 13:45:08 +02:00
drm_of.c drm: Convert to using %pOF instead of full_name 2017-07-26 13:45:06 +02:00
drm_panel.c
drm_pci.c drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
drm_plane_helper.c
drm_plane.c
drm_prime.c
drm_print.c
drm_probe_helper.c drm: add helper to validate YCBCR420 modes 2017-07-14 21:23:54 +03:00
drm_property.c drm: rename, adjust and export drm_atomic_replace_property_blob 2017-07-14 15:53:06 +02:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c
drm_simple_kms_helper.c drm/simple-kms-helper: Fix the check for the mismatch between plane and CRTC enabled. 2017-07-13 09:44:51 +02:00
drm_syncobj.c Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h
drm_vblank.c Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
drm_vm.c
drm_vma_manager.c
Kconfig
Makefile Merge tag 'drm-misc-next-2017-06-15' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-06-16 09:33:43 +10:00