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linux/drivers/gpu/drm/i915
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Chris Wilson d0a57789d5 drm/i915: Only insert the mb() before updating the fence parameter 
With a fence, we only need to insert a memory barrier around the actual
fence alteration for CPU accesses through the GTT. Performing the
barrier in flush-fence was inserting unnecessary and expensive barriers
for never fenced objects.

Note removing the barriers from flush-fence, which was effectively a
barrier before every direct access through the GTT, revealed that we
where missing a barrier before the first access through the GTT. Lack of
that barrier was sufficient to cause GPU hangs.

v2: Add a couple more comments to explain the new barriers

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-01-20 13:11:16 +01:00
..
dvo.h Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-10-03 23:29:23 -07:00
dvo_ch7xxx.c drm/i915/dvo-ch7xxx: fix get_hw_state 2012-10-12 10:59:11 +02:00
dvo_ch7017.c drm/i915/dvo: implement get_hw_state 2012-09-06 07:58:52 +02:00
dvo_ivch.c drm/i915/dvo: implement get_hw_state 2012-09-06 07:58:52 +02:00
dvo_ns2501.c drm/i915/dvo: implement get_hw_state 2012-09-06 07:58:52 +02:00
dvo_sil164.c drm/i915/dvo: implement get_hw_state 2012-09-06 07:58:52 +02:00
dvo_tfp410.c drm/i915/dvo: implement get_hw_state 2012-09-06 07:58:52 +02:00
i915_debugfs.c drm/i915: clear up wedged transitions 2013-01-20 13:11:16 +01:00
i915_dma.c drm/i915: extract hangcheck/reset/error_state state into substruct 2013-01-20 13:11:14 +01:00
i915_drv.c drm/i915: extract hangcheck/reset/error_state state into substruct 2013-01-20 13:11:14 +01:00
i915_drv.h drm/i915: clear up wedged transitions 2013-01-20 13:11:16 +01:00
i915_gem.c drm/i915: Only insert the mb() before updating the fence parameter 2013-01-20 13:11:16 +01:00
i915_gem_context.c drm/i915: Preallocate next seqno before touching the ring 2012-11-29 11:43:52 +01:00
i915_gem_debug.c UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/ 2012-10-02 18:01:07 +01:00
i915_gem_dmabuf.c Merge tag 'drm-intel-next-2012-12-21' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-01-17 20:34:08 +10:00
i915_gem_evict.c drm/i915: Create a gtt structure 2013-01-17 22:33:56 +01:00
i915_gem_execbuffer.c drm/i915: Create a gtt structure 2013-01-17 22:33:56 +01:00
i915_gem_gtt.c drm/i915: Needs_dmar, not 2013-01-20 13:11:12 +01:00
i915_gem_stolen.c drm/i915: fixup overlay stolen memory leak 2012-12-18 16:06:51 +01:00
i915_gem_tiling.c drm/i915: Create a gtt structure 2013-01-17 22:33:56 +01:00
i915_ioc32.c UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/ 2012-10-02 18:01:07 +01:00
i915_irq.c drm/i915: clear up wedged transitions 2013-01-20 13:11:16 +01:00
i915_reg.h drm/i915: Fix RGB color range property for PCH platforms 2013-01-20 13:09:43 +01:00
i915_suspend.c drm/i915: Remove save/restore of physical HWS_PGA register 2012-11-21 17:45:02 +01:00
i915_sysfs.c drm/i915: fixup l3 parity sysfs access check 2012-12-05 19:10:20 +01:00
i915_trace.h drm/i915: Allow DRM_ROOT_ONLY|DRM_MASTER to submit privileged batchbuffers 2012-10-17 21:06:59 +02:00
i915_trace_points.c drm/i915: [sparse] trivial sparse fixes 2012-04-18 10:34:49 +02:00
intel_acpi.c UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/ 2012-10-02 18:01:07 +01:00
intel_bios.c Merge branch 'drm-next-3.8' of git://people.freedesktop.org/~agd5f/linux into drm-next 2012-12-10 20:03:58 +10:00
intel_bios.h UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/ 2012-10-02 18:01:07 +01:00
intel_crt.c Merge tag 'drm-intel-next-2012-12-21' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-01-17 20:34:08 +10:00
intel_ddi.c Merge tag 'drm-intel-next-2012-12-21' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-01-17 20:34:08 +10:00
intel_display.c drm/i915: clear up wedged transitions 2013-01-20 13:11:16 +01:00
intel_dp.c drm/i915: Add "Automatic" mode for the "Broadcast RGB" property 2013-01-20 13:09:44 +01:00
intel_drv.h drm/i915: Provide the quantization range in the AVI infoframe 2013-01-20 13:09:45 +01:00
intel_dvo.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-10-03 23:29:23 -07:00
intel_fb.c drm/i915: Remove use of gtt_mappable_entries 2013-01-20 13:09:20 +01:00
intel_hdmi.c drm/i915: Provide the quantization range in the AVI infoframe 2013-01-20 13:09:45 +01:00
intel_i2c.c drm/i915: use _NOTRACE for gmbus/dp aux wait loops 2012-12-06 13:19:13 +01:00
intel_lvds.c drm/i915: Return the real error code from intel_set_mode() 2012-12-20 21:09:55 +01:00
intel_modes.c drm/i915: Add "Automatic" mode for the "Broadcast RGB" property 2013-01-20 13:09:44 +01:00
intel_opregion.c Linux 3.7-rc2 2012-10-22 14:34:51 +02:00
intel_overlay.c drm/i915: Create a gtt structure 2013-01-17 22:33:56 +01:00
intel_panel.c drm/i915: do not access BLC_PWM_CTL2 on pre-gen4 hardware 2012-12-04 22:30:25 +01:00
intel_pm.c Merge tag 'drm-intel-next-2012-12-21' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-01-17 20:34:08 +10:00
intel_ringbuffer.c drm/i915: move wedged to the other gpu error handling stuff 2013-01-20 13:11:15 +01:00
intel_ringbuffer.h Merge tag 'drm-intel-next-2012-12-21' of git://people.freedesktop.org/~danvet/drm-intel into drm-next 2013-01-17 20:34:08 +10:00
intel_sdvo.c drm/i915: Provide the quantization range in the AVI infoframe 2013-01-20 13:09:45 +01:00
intel_sdvo_regs.h drm/i915: clear the entire sdvo infoframe buffer 2012-10-24 15:12:48 +02:00
intel_sprite.c drm/i915: Bad pixel formats can't reach the sprite code 2012-11-11 23:51:14 +01:00
intel_tv.c drm/i915: Return the real error code from intel_set_mode() 2012-12-20 21:09:55 +01:00
Makefile drm/i915: Support for ns2501-DVO 2012-07-25 18:23:48 +02:00