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c81d46138d
linux/drivers/gpu/drm/i915
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Chris Wilson c81d46138d drm/i915: Convert trace-irq to the breadcrumb waiter 
If we convert the tracing over from direct use of ring->irq_get() and
over to the breadcrumb infrastructure, we only have a single user of the
ring->irq_get and so we will be able to simplify the driver routines
(eliminating the redundant validation and irq refcounting).

Process context is preferred over softirq (or even hardirq) for a couple
of reasons:

 - we already utilize process context to have fast wakeup of a single
   client (i.e. the client waiting for the GPU inspects the seqno for
   itself following an interrupt to avoid the overhead of a context
   switch before it returns to userspace)

 - engine->irq_seqno() is not suitable for use from an softirq/hardirq
   context as we may require long waits (100-250us) to ensure the seqno
   write is posted before we read it from the CPU

A signaling framework is a requirement for enabling dma-fences.

v2: Move to a signaling framework based upon the waiter.
v3: Track the first-signal to avoid having to walk the rbtree everytime.
v4: Mark the signaler thread as RT priority to reduce latency in the
indirect wakeups.
v5: Make failure to allocate the thread fatal.
v6: Rename kthreads to i915/signal:%u

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467390209-3576-16-git-send-email-chris@chris-wilson.co.uk
2016-07-01 21:02:34 +01:00
..
gvt drm/i915: gvt: Introduce the basic architecture of GVT-g 2016-06-17 20:35:06 +01:00
dvo_ch7xxx.c
dvo_ch7017.c
dvo_ivch.c
dvo_ns2501.c
dvo_sil164.c
dvo_tfp410.c
dvo.h
i915_cmd_parser.c drm/i915: Fix a buch of kerneldoc warnings 2016-06-06 13:04:26 +01:00
i915_debugfs.c drm/i915: Use HWS for seqno tracking everywhere 2016-07-01 20:58:48 +01:00
i915_drv.c drm/i915: Remove the dedicated hangcheck workqueue 2016-07-01 20:42:29 +01:00
i915_drv.h drm/i915: Convert trace-irq to the breadcrumb waiter 2016-07-01 21:02:34 +01:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Mark all default contexts as uninitialised after context loss 2016-06-24 15:02:55 +01:00
i915_gem_debug.c
i915_gem_dmabuf.c
i915_gem_dmabuf.h drm/i915: Serialise presentation with imported dmabufs 2016-06-17 10:32:26 +01:00
i915_gem_evict.c drm/i915: Only switch to default context when evicting from GGTT 2016-06-24 15:03:32 +01:00
i915_gem_execbuffer.c drm: Extract drm_is_current_master 2016-06-21 21:58:12 +02:00
i915_gem_fence.c drm/i915: Introduce & use new lightweight SGL iterators 2016-05-20 13:43:00 +01:00
i915_gem_gtt.c drm/i915: tweak gen6_for_{each_pde, all_pdes} macros 2016-06-27 13:13:53 +01:00
i915_gem_gtt.h drm/i915: tweak gen6_for_{each_pde, all_pdes} macros 2016-06-27 13:13:53 +01:00
i915_gem_render_state.c drm/i915:bxt: Enable Pooled EU support 2016-06-14 10:42:35 +01:00
i915_gem_render_state.h
i915_gem_shrinker.c drm/i915/shrinker: Flush active on objects before counting 2016-07-01 20:42:27 +01:00
i915_gem_stolen.c drm/i915/kbl: Add WaSkipStolenMemoryFirstPage for A0 2016-06-08 16:20:23 +03:00
i915_gem_tiling.c Merge branch 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-06-02 07:58:36 +10:00
i915_gem_userptr.c drm/i915: Introduce & use new lightweight SGL iterators 2016-05-20 13:43:00 +01:00
i915_gem.c drm/i915: Convert trace-irq to the breadcrumb waiter 2016-07-01 21:02:34 +01:00
i915_gem.h
i915_gpu_error.c drm/i915: Use HWS for seqno tracking everywhere 2016-07-01 20:58:48 +01:00
i915_guc_reg.h drm/i915/bxt: reserve space for RC6 in the the GuC WOPCM 2016-05-18 12:49:19 +01:00
i915_guc_submission.c drm/i915/guc: Remove one unnecessary variable 2016-06-21 15:43:32 +01:00
i915_ioc32.c
i915_irq.c drm/i915: Only apply one barrier after a breadcrumb interrupt is posted 2016-07-01 21:00:54 +01:00
i915_params.c drm/i915: Set the access right of kernel param "i915.enable_gvt" to read-only. 2016-06-21 11:45:27 +01:00
i915_params.h drm/i915: gvt: Introduce the basic architecture of GVT-g 2016-06-17 20:35:06 +01:00
i915_pci.c drm/i915/bxt: Remove the preliminary_hw_support flag 2016-07-01 21:25:54 +03:00
i915_pvinfo.h drm/i915: Use offsetof() to calculate the offset of members in PVINFO page 2016-06-17 19:44:25 +01:00
i915_reg.h drm/i915/bxt: Fix sanity check for BIOS RC6 setup 2016-07-01 14:57:20 +03:00
i915_suspend.c
i915_sysfs.c drm/i915: No need to wait for idle on L3 remap 2016-06-24 15:03:06 +01:00
i915_trace_points.c
i915_trace.h drm/i915: Convert trace-irq to the breadcrumb waiter 2016-07-01 21:02:34 +01:00
i915_vgpu.c drm/i915: Fold vGPU active check into inner functions 2016-06-17 19:44:29 +01:00
i915_vgpu.h drm/i915: Fold vGPU active check into inner functions 2016-06-17 19:44:29 +01:00
intel_acpi.c
intel_atomic_plane.c drm/i915: Revert async unpin and nonblocking atomic commit 2016-06-01 09:46:46 +02:00
intel_atomic.c drm: Consolidate plane arrays in drm_atomic_state 2016-06-02 17:20:25 +02:00
intel_audio.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2016-05-23 11:48:48 -07:00
intel_bios.c drm/i915: Check VBT for port presence in addition to the strap on VLV/CHV 2016-06-07 18:45:43 +03:00
intel_bios.h drm/i915: Parse LFP brightness control field in VBT 2016-05-02 16:17:38 +03:00
intel_breadcrumbs.c drm/i915: Convert trace-irq to the breadcrumb waiter 2016-07-01 21:02:34 +01:00
intel_color.c drm: drm_helper_crtc_enable_color_mgmt() => drm_crtc_enable_color_mgmt() 2016-06-07 17:10:49 +03:00
intel_crt.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:02 +01:00
intel_csr.c drm/i915/dmc: Step away from symbolic links 2016-06-27 14:26:16 -07:00
intel_ddi.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:03 +01:00
intel_display.c drm/i915: Spin after waking up for an interrupt 2016-07-01 20:58:47 +01:00
intel_dp_aux_backlight.c
intel_dp_link_training.c drm/i915: Revert DisplayPort fast link training feature 2016-06-20 12:37:07 +03:00
intel_dp_mst.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:15 +01:00
intel_dp.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:14 +01:00
intel_dpio_phy.c drm/i915: Move VLV HDMI lane reset work around logic to intel_dpio_phy.c 2016-04-29 09:59:00 +03:00
intel_dpll_mgr.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:16 +01:00
intel_dpll_mgr.h
intel_drv.h drm/i915: Use atomic waits for short non-atomic ones 2016-06-29 15:53:15 +01:00
intel_dsi_dcs_backlight.c drm/i915/dsi: CABC support for Panel PWM backlight control 2016-05-17 16:12:39 +03:00
intel_dsi_panel_vbt.c
intel_dsi_pll.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:20 +01:00
intel_dsi.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:19 +01:00
intel_dsi.h drm/i915/dsi: CABC support for Panel PWM backlight control 2016-05-17 16:12:39 +03:00
intel_dvo.c drm/i915: Move connector registration to driver registration 2016-06-24 14:43:26 +01:00
intel_fbc.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:21 +01:00
intel_fbdev.c drm/i915/fbdev: Flush mode configuration before lastclose 2016-06-21 09:36:56 +01:00
intel_fifo_underrun.c
intel_frontbuffer.c
intel_guc_fwif.h drm/i915/guc: rework guc_add_workqueue_item() 2016-05-23 14:21:53 +01:00
intel_guc_loader.c drm/i915/guc: don't ever forward VBlank to the GuC 2016-06-27 13:21:59 +01:00
intel_guc.h drm/i915/guc: index host arrays by i915 engine ID, not guc_id 2016-06-21 11:24:25 +01:00
intel_gvt.c drm/i915/gvt: Mark i915.enable_gvt as false if loading fails 2016-06-21 12:40:13 +01:00
intel_gvt.h drm/i915: gvt: Introduce the basic architecture of GVT-g 2016-06-17 20:35:06 +01:00
intel_hdmi.c drm/i915: Move connector registration to driver registration 2016-06-24 14:43:26 +01:00
intel_hotplug.c drm/i915: Small display interrupt handlers tidy 2016-05-09 13:38:16 +01:00
intel_i2c.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:22 +01:00
intel_lrc.c drm/i915: Refactor scratch object allocation for gen2 w/a buffer 2016-07-01 21:00:50 +01:00
intel_lrc.h drm/i915: Introduce execlist context status change notification 2016-06-17 20:36:19 +01:00
intel_lvds.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:23 +01:00
intel_mocs.c drm/i915/mocs: || vs | typo in get_mocs_settings() 2016-06-13 17:38:01 +03:00
intel_mocs.h
intel_modes.c
intel_opregion.c drm/i915/opregion: handle missing connector types for acpi display types 2016-06-29 17:41:50 +03:00
intel_overlay.c Merge branch 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-06-02 07:58:36 +10:00
intel_panel.c drm/i915: Move backlight registration to connector registration 2016-06-24 14:43:14 +01:00
intel_pm.c drm/i915: Spin after waking up for an interrupt 2016-07-01 20:58:47 +01:00
intel_psr.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:25 +01:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c drm/i915: Add a delay between interrupt and inspecting the final seqno (ilk) 2016-07-01 21:00:53 +01:00
intel_ringbuffer.h drm/i915: Convert trace-irq to the breadcrumb waiter 2016-07-01 21:02:34 +01:00
intel_runtime_pm.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 17:05:41 +01:00
intel_sdvo_regs.h
intel_sdvo.c drm/i915: Move connector registration to driver registration 2016-06-24 14:43:26 +01:00
intel_sideband.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 15:42:33 +01:00
intel_sprite.c drm/i915: Signal drm events for atomic 2016-06-16 14:28:34 +02:00
intel_tv.c drm/i915: Move connector registration to driver registration 2016-06-24 14:43:26 +01:00
intel_uncore.c drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 2016-06-30 17:05:07 +01:00
intel_vbt_defs.h drm/i915: Extract physical display dimensions from VBT 2016-06-02 14:33:09 +03:00
Kconfig drm/i915: gvt: Introduce the basic architecture of GVT-g 2016-06-17 20:35:06 +01:00
Kconfig.debug drm/i915/debug: Select PREEMPT_COUNT when enabling debugging 2016-06-29 15:53:14 +01:00
Makefile drm/i915: Slaughter the thundering i915_wait_request herd 2016-07-01 20:58:43 +01:00