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c7302f2044
linux_dsm_epyc7002/drivers/gpu/drm/i915
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Chris Wilson c7302f2044 drm/i915: Defer final intel_wakeref_put to process context 
As we need to acquire a mutex to serialise the final
intel_wakeref_put, we need to ensure that we are in process context at
that time. However, we want to allow operation on the intel_wakeref from
inside timer and other hardirq context, which means that need to defer
that final put to a workqueue.

Inside the final wakeref puts, we are safe to operate in any context, as
we are simply marking up the HW and state tracking for the potential
sleep. It's only the serialisation with the potential sleeping getting
that requires careful wait avoidance. This allows us to retain the
immediate processing as before (we only need to sleep over the same
races as the current mutex_lock).

v2: Add a selftest to ensure we exercise the code while lockdep watches.
v3: That test was extremely loud and complained about many things!
v4: Not a whale!

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111295
References: https://bugs.freedesktop.org/show_bug.cgi?id=111245
References: https://bugs.freedesktop.org/show_bug.cgi?id=111256
Fixes: 18398904ca ("drm/i915: Only recover active engines")
Fixes: 51fbd8de87 ("drm/i915/pmu: Atomically acquire the gt_pm wakeref")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190808202758.10453-1-chris@chris-wilson.co.uk
2019-08-08 21:28:51 +01:00
..
display drm/i915/tgl: Fix the read of the DDI that transcoder is attached to 2019-08-08 12:21:58 -07:00
gem drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
gt drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
gvt drm/i915: Allocate kernel_contexts directly 2019-08-08 15:45:34 +01:00
oa drm/i915/perf: Refactor oa object to better manage resources 2019-08-07 20:34:39 +01:00
selftests drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
i915_active_types.h drm/i915: Allow sharing the idle-barrier from other kernel requests 2019-08-02 11:53:04 +01:00
i915_active.c drm/i915: Allow sharing the idle-barrier from other kernel requests 2019-08-02 11:53:04 +01:00
i915_active.h drm/i915: Allow sharing the idle-barrier from other kernel requests 2019-08-02 11:53:04 +01:00
i915_cmd_parser.c drm/i915/gt: Move the [class][inst] lookup for engines onto the GT 2019-08-06 15:00:43 +01:00
i915_debugfs.c drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
i915_debugfs.h
i915_drv.c drm/i915: split out intel_pch.[ch] from i915_drv.[ch] 2019-08-08 11:38:22 +03:00
i915_drv.h drm/i915: split out intel_pch.[ch] from i915_drv.[ch] 2019-08-08 11:38:22 +03:00
i915_fixed.h drm/i915: make i915_fixed.h self-contained 2019-06-27 10:50:24 +03:00
i915_gem_evict.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_gem_fence_reg.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_gem_fence_reg.h drm/i915: Convert i915_gem_init_swizzling to intel_gt 2019-06-21 13:48:22 +01:00
i915_gem_gtt.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_gem_gtt.h drm/i915: Move aliasing_ppgtt underneath its i915_ggtt 2019-07-30 16:09:32 +01:00
i915_gem.c drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
i915_gem.h drm/i915: avoid including intel_drv.h via i915_drv.h->i915_trace.h 2019-08-07 12:43:14 +03:00
i915_getparam.c drm/i915: Isolate i915_getparam_ioctl() 2019-08-07 16:48:24 +01:00
i915_globals.c drm/i915: Move more GEM objects under gem/ 2019-05-28 12:45:29 +01:00
i915_globals.h drm/i915: make i915_globals.h self-contained 2019-06-27 10:50:32 +03:00
i915_gpu_error.c drm/i915: Include the DRIVER_DATE in the error state 2019-08-07 14:30:59 +01:00
i915_gpu_error.h drm/i915: Rely on spinlock protection for GPU error capture 2019-07-23 00:22:20 +01:00
i915_ioc32.c
i915_irq.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
i915_irq.h drm/i915/irq: un-inline functions to avoid i915_drv.h include 2019-08-07 12:01:40 +03:00
i915_memcpy.c
i915_mm.c drm/i915: Drop expectations of VM_IO from our GGTT mmappings 2019-08-07 12:06:07 +01:00
i915_params.c Revert "drm/i915: Update description of i915.enable_guc modparam" 2019-07-19 15:36:21 +01:00
i915_params.h Revert "drm/i915/guc: Turn on GuC/HuC auto mode" 2019-07-19 15:35:58 +01:00
i915_pci.c drm/i915: Use drm_i915_private directly from drv_get_drvdata() 2019-08-06 09:36:22 +01:00
i915_perf.c drm/i915/perf: Refactor oa object to better manage resources 2019-08-07 20:34:39 +01:00
i915_pmu.c drm/i915/gt: Move the [class][inst] lookup for engines onto the GT 2019-08-06 15:00:43 +01:00
i915_pmu.h
i915_priolist_types.h drm/i915: add infrastructure to hold off preemption on a request 2019-07-09 21:26:40 +01:00
i915_pvinfo.h drm/i915: make i915_pvinfo.h self-contained 2019-06-27 10:50:35 +03:00
i915_query.c drm/i915/gt: Move the [class][inst] lookup for engines onto the GT 2019-08-06 15:00:43 +01:00
i915_query.h
i915_reg.h drm/i915/tgl: Fix the read of the DDI that transcoder is attached to 2019-08-08 12:21:58 -07:00
i915_request.c drm/i915: avoid including intel_drv.h via i915_drv.h->i915_trace.h 2019-08-07 12:43:14 +03:00
i915_request.h drm/i915: add infrastructure to hold off preemption on a request 2019-07-09 21:26:40 +01:00
i915_scatterlist.c drm/i915: Pull scatterlist utils out of i915_gem.h 2019-05-28 12:45:29 +01:00
i915_scatterlist.h drm/i915: Pull scatterlist utils out of i915_gem.h 2019-05-28 12:45:29 +01:00
i915_scheduler_types.h drm/i915/execlists: Minimalistic timeslicing 2019-06-20 16:52:36 +01:00
i915_scheduler.c drm/i915/execlists: Minimalistic timeslicing 2019-06-20 16:52:36 +01:00
i915_scheduler.h
i915_selftest.h drm/i915: make i915_selftest.h self-contained 2019-07-30 13:41:35 -07:00
i915_suspend.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_sw_fence.c
i915_sw_fence.h
i915_syncmap.c
i915_syncmap.h
i915_sysfs.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_trace_points.c
i915_trace.h drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
i915_user_extensions.c
i915_user_extensions.h
i915_utils.h drm/i915/execlists: Preempt-to-busy 2019-06-20 16:52:36 +01:00
i915_vgpu.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
i915_vgpu.h drm/i915: make i915_vgpu.h self-contained 2019-06-27 10:50:38 +03:00
i915_vma.c drm/i915: avoid including intel_drv.h via i915_drv.h->i915_trace.h 2019-08-07 12:43:14 +03:00
i915_vma.h drm/i915: Hide unshrinkable context objects from the shrinker 2019-08-02 23:39:46 +01:00
intel_csr.c drm/i915/dmc: Load DMC on TGL 2019-08-06 08:32:38 -07:00
intel_csr.h
intel_device_info.c drm/i915/tgl: Check if pipe D is fused 2019-07-11 16:31:03 -07:00
intel_device_info.h drm/i915/tgl: Tigerlake only has global MOCS registers 2019-07-31 07:40:32 -07:00
intel_gvt.c drm/i915: Add i915 to i915_inject_probe_failure 2019-08-02 21:14:29 +01:00
intel_gvt.h drm/i915: Propagate "_remove" function name suffix down 2019-07-12 13:05:08 +01:00
intel_pch.c drm/i915: split out intel_pch.[ch] from i915_drv.[ch] 2019-08-08 11:38:22 +03:00
intel_pch.h drm/i915: split out intel_pch.[ch] from i915_drv.[ch] 2019-08-08 11:38:22 +03:00
intel_pm.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_pm.h drm/i915: Convert most of atomic commit to take more intel state 2019-07-01 10:32:14 +02:00
intel_runtime_pm.c drm/i915: avoid including intel_drv.h via i915_drv.h->i915_trace.h 2019-08-07 12:43:14 +03:00
intel_runtime_pm.h Merge drm/drm-next into drm-intel-next-queued 2019-07-29 08:51:48 -07:00
intel_sideband.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
intel_sideband.h
intel_uncore.c drm/i915: remove unnecessary includes of intel_display_types.h header 2019-08-07 12:43:55 +03:00
intel_uncore.h drm/i915/uc: Move uC WOPCM setup in uc_init_hw 2019-07-31 10:19:28 +01:00
intel_wakeref.c drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
intel_wakeref.h drm/i915: Defer final intel_wakeref_put to process context 2019-08-08 21:28:51 +01:00
intel_wopcm.c drm/i915: Make wopcm_to_i915() private 2019-08-07 20:53:17 +01:00
intel_wopcm.h drm/i915/wopcm: Don't fail on WOPCM partitioning failure 2019-08-02 21:14:32 +01:00
Kconfig drm/i915: add force_probe module parameter to replace alpha_support 2019-05-31 16:20:30 +03:00
Kconfig.debug drm/i915: use upstream version of header tests 2019-07-30 12:11:57 +03:00
Kconfig.profile drm/i915: Add a label for config DRM_I915_SPIN_REQUEST 2019-06-12 11:18:55 +01:00
Makefile drm/i915: Allocate kernel_contexts directly 2019-08-08 15:45:34 +01:00