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381e8ae377
linux_dsm_epyc7002/drivers/gpu/drm/i915
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Tomas Elf 381e8ae377 drm/i915: Early exit from semaphore_waits_for for execlist mode. 
When submitting semaphores in execlist mode the hang checker crashes in this
function because it is only runnable in ring submission mode. The reason this
is of particular interest to the TDR patch series is because we use semaphores
as a mean to induce hangs during testing (which is the recommended way to
induce hangs for gen8+). It's not clear how this is supposed to work in
execlist mode since:

1. This function requires a ring buffer.

2. Retrieving a ring buffer in execlist mode requires us to retrieve the
corresponding context, which we get from a request.

3. Retieving a request from the hang checker is not straight-forward since that
requires us to grab the struct_mutex in order to synchronize against the
request retirement thread.

4. Grabbing the struct_mutex from the hang checker is nothing that we will do
since that puts us at risk of deadlock since a hung thread might be holding the
struct_mutex already.

Therefore it's not obvious how we're supposed to deal with this. For now, we're
doing an early exit from this function, which avoids any kernel panic situation
when running our own internal TDR ULT.

* v2: (Chris Wilson)
Turned the execlist mode check into a ringbuffer NULL check to make it more
submission mode agnostic and less of a layering violation.

Signed-off-by: Tomas Elf <tomas.elf@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-10-09 10:22:38 +02:00
..
dvo_ch7xxx.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo_ch7017.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo_ivch.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo_ns2501.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo_sil164.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo_tfp410.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
dvo.h drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
i915_cmd_parser.c drm/i915: Add GEN7_GPGPU_DISPATCHDIMX/Y/Z to the register whitelist 2015-10-06 10:40:22 +02:00
i915_debugfs.c drm/i915: unlock on error in i915_ppgtt_info() 2015-10-05 10:01:02 +02:00
i915_dma.c Merge remote-tracking branch 'takashi/topic/drm-sync-audio-rate' into drm-intel-next-queued 2015-10-07 16:05:04 +02:00
i915_drv.c drm/i915/guc: Add host2guc notification for suspend and resume 2015-10-06 10:32:22 +02:00
i915_drv.h drm/i915: Avoid GPU stalls from kswapd 2015-10-07 16:05:41 +02:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Remove wrong warning from i915_gem_context_clean 2015-10-09 10:19:48 +02:00
i915_gem_debug.c
i915_gem_dmabuf.c drm/i915: remove unused has_dma_mapping flag 2015-07-13 22:42:41 +02:00
i915_gem_evict.c drm/i915: Remove dead i915_gem_evict_everything() 2015-10-07 16:05:40 +02:00
i915_gem_execbuffer.c drm/i915: Kill DRI1 cliprects 2015-10-07 16:05:41 +02:00
i915_gem_fence.c drm/i915: Parametrize fence registers 2015-09-30 10:20:03 +02:00
i915_gem_gtt.c drm/i915: Add LO/HI PRIVATE_PAT registers 2015-09-30 10:20:13 +02:00
i915_gem_gtt.h drm/i915: prevent out of range pt in the PDE macros (take 3) 2015-10-06 14:15:29 +02:00
i915_gem_render_state.c drm/i915: Add provision to extend Golden context batch 2015-07-21 09:30:57 +02:00
i915_gem_render_state.h drm/i915: Add provision to extend Golden context batch 2015-07-21 09:30:57 +02:00
i915_gem_shrinker.c drm/i915: Avoid GPU stalls from kswapd 2015-10-07 16:05:41 +02:00
i915_gem_stolen.c drm/i915: Determine the stolen memory base address on gen2 2015-10-09 10:14:43 +02:00
i915_gem_tiling.c Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
i915_gem_userptr.c drm/i915: Use a task to cancel the userptr on invalidate_range 2015-10-06 14:15:30 +02:00
i915_gem.c drm/i915/snb: remove pre-production hardware workaround 2015-10-07 16:28:35 +02:00
i915_gpu_error.c drm/i915: rename INSTDONE1 to GEN4_INSTDONE1 2015-10-02 14:25:19 +02:00
i915_guc_reg.h drm/i915: Parametrize UOS_RSA_SCRATCH 2015-09-30 10:20:13 +02:00
i915_guc_submission.c drm/i915/guc: Add host2guc notification for suspend and resume 2015-10-06 10:32:22 +02:00
i915_ioc32.c Merge tag 'drm-intel-fixes-2015-07-15' into drm-intel-next-queued 2015-07-15 16:36:50 +02:00
i915_irq.c drm/i915: Early exit from semaphore_waits_for for execlist mode. 2015-10-09 10:22:38 +02:00
i915_params.c drm/i915: Mark debug mod options as _unsafe 2015-09-22 17:10:53 +02:00
i915_reg.h drm/i915/bxt: Set time interval unit to 0.833us 2015-10-07 16:06:24 +02:00
i915_suspend.c drm/i915: use dev_priv for the FBC functions 2015-07-08 11:39:45 +02:00
i915_sysfs.c drm/i915/bxt: fix RC6 residency time calculation 2015-09-30 17:15:13 +02:00
i915_trace_points.c
i915_trace.h drm/i915: Add a tracepoint for the shrinker 2015-10-07 16:05:38 +02:00
i915_vgpu.c
i915_vgpu.h drm/i915: Update PV INFO page definition for Intel GVT-g 2015-09-02 11:46:12 +02:00
intel_acpi.c drm/i915: Spell vga_switcheroo consistently 2015-09-22 17:10:52 +02:00
intel_atomic_plane.c drm/i915: Do not handle a null plane state. 2015-09-10 18:27:17 +02:00
intel_atomic.c drm/i915/ivb: Move WaCxSRDisabledForSpriteScaling w/a to atomic check 2015-09-30 17:15:42 +02:00
intel_audio.c drm/i915: DocBook add i915_component.h support 2015-10-07 16:05:38 +02:00
intel_bios.c Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next 2015-09-30 08:47:41 +02:00
intel_bios.h drm/i915: Ignore "digital output" and "not HDMI output" bits for eDP detection 2015-09-23 16:58:29 +02:00
intel_crt.c drm/i915: s/_FDI_RXA_.../FDI_RX_...(PIPE_A)/ 2015-09-30 17:15:11 +02:00
intel_csr.c drm/i915/skl: Added a check for the hardware status of csr fw before loading. 2015-09-30 10:14:22 +02:00
intel_ddi.c drm/i915: Rename DP link training functions 2015-10-06 10:53:52 +02:00
intel_display.c drm/i915: remove pre-atomic check from SKL update_primary_plane 2015-10-09 09:35:19 +02:00
intel_dp_mst.c drm/i915: Rename DP link training functions 2015-10-06 10:53:52 +02:00
intel_dp.c drm/i915: use error path 2015-10-08 16:30:13 +02:00
intel_drv.h drm/i915: Rename DP link training functions 2015-10-06 10:53:52 +02:00
intel_dsi_panel_vbt.c
intel_dsi_pll.c drm/i915/bxt: vlv_dsi_reset_clocks() can be static 2015-10-06 10:57:06 +02:00
intel_dsi.c drm/i915/bxt: get DSI pixelclock 2015-10-02 14:45:51 +02:00
intel_dsi.h drm/i915/bxt: get DSI pixelclock 2015-10-02 14:45:51 +02:00
intel_dvo.c drm/i915: Constify adjusted_mode 2015-09-30 10:20:11 +02:00
intel_fbc.c drm/i915: fix FBC buffer size checks 2015-10-09 09:35:50 +02:00
intel_fbdev.c drm/i915: don't allocate fbcon from stolen memory if it's too big 2015-10-09 09:31:58 +02:00
intel_fifo_underrun.c
intel_frontbuffer.c drm/i915: fix FBC frontbuffer tracking flushing code 2015-08-05 09:59:44 +02:00
intel_guc_fwif.h drm/i915/guc: Add host2guc notification for suspend and resume 2015-10-06 10:32:22 +02:00
intel_guc_loader.c drm/i915/guc: Add host2guc notification for suspend and resume 2015-10-06 10:32:22 +02:00
intel_guc.h drm/i915/guc: Add host2guc notification for suspend and resume 2015-10-06 10:32:22 +02:00
intel_hdmi.c Revert "drm/i915: Add hot_plug hook for hdmi encoder" 2015-10-08 21:50:57 +02:00
intel_hotplug.c Revert "drm/i915: Call encoder hotplug for init and resume cases" 2015-10-08 21:51:57 +02:00
intel_i2c.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-06-26 13:18:51 -07:00
intel_lrc.c drm/i915: Kill DRI1 cliprects 2015-10-07 16:05:41 +02:00
intel_lrc.h drm/i915: Parametrize LRC registers 2015-09-23 17:13:01 +02:00
intel_lvds.c drm/i915: Always call the adjusted mode 'adjusted_mode' 2015-09-30 10:19:52 +02:00
intel_mocs.c drm/i915: Added Programming of the MOCS 2015-07-14 17:13:14 +02:00
intel_mocs.h drm/i915: Added Programming of the MOCS 2015-07-14 17:13:14 +02:00
intel_modes.c drm/i915: Add HDMI aspect ratio property for SDVO 2015-09-30 10:20:12 +02:00
intel_opregion.c drm/i915/bxt: DSI encoder support in CRTC modeset 2015-10-02 14:27:55 +02:00
intel_overlay.c drm/i915: Update intel_ring_begin() to take a request structure 2015-06-23 14:02:29 +02:00
intel_panel.c drm/i915/bxt: Modify BXT BLC according to VBT changes 2015-10-02 14:59:25 +02:00
intel_pm.c drm/i915/chv: remove pre-production hardware workarounds 2015-10-07 16:31:22 +02:00
intel_psr.c drm/i915: VLV/CHV PSR: Increase wait delay time before active PSR. 2015-08-05 10:07:44 +02:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c drm/i915: Hook up ring workaround writes at context creation time on Gen6-7. 2015-10-07 16:37:48 +02:00
intel_ringbuffer.h drm/i915: Refactor common ringbuffer allocation code 2015-09-04 10:17:00 +02:00
intel_runtime_pm.c drm/i915: Skip CHV PHY asserts until PHY has been fully reset 2015-10-06 10:29:40 +02:00
intel_sdvo_regs.h
intel_sdvo.c Revert "drm/i915: Call encoder hotplug for init and resume cases" 2015-10-08 21:51:57 +02:00
intel_sideband.c
intel_sprite.c drm/i915: Drop intel_update_sprite_watermarks 2015-09-30 17:15:47 +02:00
intel_tv.c Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next 2015-09-30 08:47:41 +02:00
intel_uncore.c drm/i915: Include MCHBAR_MIRROR_BASE in ILK_GDSR 2015-09-30 10:20:15 +02:00
Kconfig drm/i915: Use CONFIG_DRM_FBDEV_EMULATION 2015-08-11 14:00:29 +02:00
Makefile Merge tag 'drm-intel-next-fixes-2015-09-02' into drm-intel-next-queued 2015-09-02 14:33:42 +02:00