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kernel/drivers/gpu/drm/i915
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Chris Wilson 0a544a2a72 drm/i915: Fixup preempt-to-busy vs resubmission of a virtual request 
As preempt-to-busy leaves the request on the HW as the resubmission is
processed, that request may complete in the background and even cause a
second virtual request to enter queue. This second virtual request
breaks our "single request in the virtual pipeline" assumptions.
Furthermore, as the virtual request may be completed and retired, we
lose the reference the virtual engine assumes is held. Normally, just
removing the request from the scheduler queue removes it from the
engine, but the virtual engine keeps track of its singleton request via
its ve->request. This pointer needs protecting with a reference.

v2: Drop unnecessary motion of rq->engine = owner

Fixes: 22b7a426bb ("drm/i915/execlists: Preempt-to-busy")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190923152844.8914-1-chris@chris-wilson.co.uk
(cherry picked from commit b647c7df01)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2019-10-16 10:57:33 -07:00
..
display drm/i915: Favor last VBT child device with conflicting AUX ch/DDC pin 2019-10-16 10:56:50 -07:00
gem drm/i915/userptr: Never allow userptr into the mappable GGTT 2019-10-16 10:56:50 -07:00
gt drm/i915: Fixup preempt-to-busy vs resubmission of a virtual request 2019-10-16 10:57:33 -07:00
gvt drm main pull for 5.4-rc1 2019-09-19 16:24:24 -07:00
oa
selftests drm/i915: Perform GGTT restore much earlier during resume 2019-10-07 10:44:46 -07:00
i915_active.c drm/i915: i915_active.retire() is optional 2019-08-19 16:41:19 +01:00
i915_active.h drm/i915: Markup expected timeline locks for i915_active 2019-08-16 18:02:07 +01:00
i915_active_types.h drm/i915: Markup expected timeline locks for i915_active 2019-08-16 18:02:07 +01:00
i915_buddy.c drm/i915/buddy: use kmemleak_update_trace 2019-08-16 16:28:41 +01:00
i915_buddy.h
i915_cmd_parser.c
i915_debugfs.c drm/i915: Pull obj->userfault tracking under the ggtt->mutex 2019-08-22 08:53:41 +01:00
i915_debugfs.h
i915_drv.c drm/i915: Perform GGTT restore much earlier during resume 2019-10-07 10:44:46 -07:00
i915_drv.h drm/i915: to make vgpu ppgtt notificaiton as atomic operation 2019-09-06 09:53:12 -07:00
i915_fixed.h
i915_gem.c drm/i915/userptr: Never allow userptr into the mappable GGTT 2019-10-16 10:56:50 -07:00
i915_gem.h drm/i915/gt: execlists->active is serialised by the tasklet 2019-10-09 14:39:31 -07:00
i915_gem_evict.c drm/i915: Replace PIN_NONFAULT with calls to PIN_NOEVICT 2019-08-21 14:07:54 +01:00
i915_gem_fence_reg.c drm/i915: Replace i915_vma_put_fence() 2019-08-22 08:53:42 +01:00
i915_gem_fence_reg.h drm/i915: Track ggtt fence reservations under its own mutex 2019-08-22 08:53:40 +01:00
i915_gem_gtt.c drm/i915: to make vgpu ppgtt notificaiton as atomic operation 2019-09-06 09:53:12 -07:00
i915_gem_gtt.h drm/i915: Replace PIN_NONFAULT with calls to PIN_NOEVICT 2019-08-21 14:07:54 +01:00
i915_getparam.c
i915_globals.c
i915_globals.h
i915_gpu_error.c Merge drm/drm-next into drm-intel-next-queued 2019-08-22 00:10:36 -07:00
i915_gpu_error.h
i915_ioc32.c
i915_irq.c drm/i915/bdw+: Move misc display IRQ handling to it own function 2019-08-13 15:51:12 -07:00
i915_irq.h
i915_memcpy.c
i915_memcpy.h
i915_mm.c
i915_params.c
i915_params.h
i915_pci.c
i915_perf.c
i915_perf.h
i915_pmu.c drm/i915: Convert a few more bland dmesg info to be device specific 2019-08-15 13:13:23 +01:00
i915_pmu.h
i915_priolist_types.h drm/i915: Push the wakeref->count deferral to the backend 2019-08-13 21:09:49 +01:00
i915_pvinfo.h
i915_query.c
i915_query.h
i915_reg.h drm/i915/tgl: Updated Private PAT programming 2019-08-20 15:23:33 +01:00
i915_request.c drm/i915: Only enqueue already completed requests 2019-10-09 13:18:26 -07:00
i915_request.h drm/i915: Only enqueue already completed requests 2019-10-09 13:18:26 -07:00
i915_scatterlist.c
i915_scatterlist.h
i915_scheduler.c drm/i915: Push the wakeref->count deferral to the backend 2019-08-13 21:09:49 +01:00
i915_scheduler.h
i915_scheduler_types.h
i915_selftest.h
i915_suspend.c
i915_suspend.h
i915_sw_fence.c Merge drm/drm-next into drm-intel-next-queued 2019-08-22 00:10:36 -07:00
i915_sw_fence.h Merge drm/drm-next into drm-intel-next-queued 2019-08-22 00:10:36 -07:00
i915_sw_fence_work.c drm/i915: Generalise the clflush dma-worker 2019-08-22 08:27:44 +01:00
i915_sw_fence_work.h drm/i915: Generalise the clflush dma-worker 2019-08-22 08:27:44 +01:00
i915_syncmap.c
i915_syncmap.h
i915_sysfs.c
i915_sysfs.h
i915_trace.h
i915_trace_points.c
i915_user_extensions.c
i915_user_extensions.h
i915_utils.c
i915_utils.h drm/i915/execlists: Lift process_csb() out of the irq-off spinlock 2019-08-16 20:59:02 +01:00
i915_vgpu.c drm/i915: to make vgpu ppgtt notificaiton as atomic operation 2019-09-06 09:53:12 -07:00
i915_vgpu.h
i915_vma.c drm/i915: Replace i915_vma_put_fence() 2019-08-22 08:53:42 +01:00
i915_vma.h drm/i915: Replace i915_vma_put_fence() 2019-08-22 08:53:42 +01:00
intel_csr.c drm/i915/tgl: update DMC firmware to 2.04 2019-08-20 12:49:29 -07:00
intel_csr.h
intel_device_info.c drm/i915/tgl: add support for reading the timestamp frequency 2019-08-20 12:48:57 -07:00
intel_device_info.h
intel_gvt.c
intel_gvt.h
intel_pch.c drm/i915/cml: Add second PCH ID for CMP 2019-10-09 13:00:56 -07:00
intel_pch.h drm/i915/cml: Add second PCH ID for CMP 2019-10-09 13:00:56 -07:00
intel_pm.c drm/i915/tgl: Introduce initial Tiger Lake workarounds 2019-08-20 15:23:33 +01:00
intel_pm.h
intel_runtime_pm.c
intel_runtime_pm.h
intel_sideband.c
intel_sideband.h
intel_uncore.c
intel_uncore.h
intel_wakeref.c drm/i915: Push the wakeref->count deferral to the backend 2019-08-13 21:09:49 +01:00
intel_wakeref.h drm/i915: Push the wakeref->count deferral to the backend 2019-08-13 21:09:49 +01:00
intel_wopcm.c drm/i915/wopcm: Fix SPDX tag location 2019-08-16 16:50:03 +01:00
intel_wopcm.h
Kconfig
Kconfig.debug drm-misc-next for 5.4: 2019-08-27 17:21:04 +10:00
Kconfig.profile
Makefile Kbuild updates for v5.4 2019-09-20 08:36:47 -07:00