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7e13ad8964
linux/drivers/gpu/drm/i915
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Chris Wilson 7e13ad8964 drm: Avoid drm_global_mutex for simple inc/dec of dev->open_count 
Since drm_global_mutex is a true global mutex across devices, we don't
want to acquire it unless absolutely necessary. For maintaining the
device local open_count, we can use atomic operations on the counter
itself, except when making the transition to/from 0. Here, we tackle the
easy portion of delaying acquiring the drm_global_mutex for the final
release by using atomic_dec_and_mutex_lock(), leaving the global
serialisation across the device opens.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Thomas Hellström (VMware) <thomas_os@shipmail.org>
Reviewed-by: Thomas Hellström <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200124130107.125404-1-chris@chris-wilson.co.uk
2020-01-24 17:41:34 +00:00
..
display drm/connector: Split out orientation quirk detection (v2) 2020-01-11 11:57:58 +01:00
gem i915 features for v5.6: 2019-12-27 15:25:04 +10:00
gt drm/i915: Mark the GEM context link as RCU protected 2019-12-23 13:08:47 +00:00
gvt drm/i915: Remove i915->kernel_context 2019-12-21 16:37:10 +00:00
oa drm/i915/tgl: Add perf support on TGL 2019-10-29 12:53:54 +02:00
selftests drm/i915/selftests: make mock_drm.h self-contained 2019-12-23 12:38:43 +02:00
i915_active_types.h drm/i915: Serialise i915_active_fence_set() with itself 2019-11-27 17:02:14 +00:00
i915_active.c drm/i915: Remove i915->kernel_context 2019-12-21 16:37:10 +00:00
i915_active.h drm/i915: Specialise i915_active.work lock classes 2019-12-02 21:57:23 +00:00
i915_buddy.c
i915_buddy.h
i915_cmd_parser.c Correct function name in comment 2019-12-16 23:13:12 +00:00
i915_debugfs.c drm/i915/rps: Add frequency translation helpers 2019-12-13 22:22:05 +00:00
i915_debugfs.h
i915_drv.c drm: Release filp before global lock 2020-01-24 17:41:34 +00:00
i915_drv.h drm/i915: Update DRIVER_DATE to 20191223 2019-12-23 19:08:14 +02:00
i915_fixed.h
i915_gem_evict.c drm/i915: Ignore most failures during evict-vm 2019-12-05 13:50:39 +00:00
i915_gem_fence_reg.c drm/i915: set num_fence_regs to 0 if there is no aperture 2019-10-29 10:35:47 +00:00
i915_gem_fence_reg.h
i915_gem_gtt.c drm/i915: Introduce a vma.kref 2019-12-23 12:31:54 +00:00
i915_gem_gtt.h drm/i915/gen7: Re-enable full-ppgtt for ivb & hsw 2019-11-30 09:21:12 +00:00
i915_gem.c drm/i915: Introduce a vma.kref 2019-12-23 12:31:54 +00:00
i915_gem.h i915 features for v5.6: 2019-12-27 15:25:04 +10:00
i915_getparam.c drm/i915: Introduce DRM_I915_GEM_MMAP_OFFSET 2019-12-04 15:11:44 +00:00
i915_globals.c drm/i915: Ratelimit i915_globals_park 2019-12-18 17:38:56 +00:00
i915_globals.h
i915_gpu_error.c drm/i915: Mark the GEM context link as RCU protected 2019-12-23 13:08:47 +00:00
i915_gpu_error.h drm/i915/tgl: Add gam instdone 2019-10-30 09:15:27 +00:00
i915_ioc32.c
i915_irq.c drm/i915/gt: Remove direct invocation of breadcrumb signaling 2019-12-18 17:11:28 +00:00
i915_irq.h drm/i915: Extract the GuC interrupt handlers 2019-10-26 19:28:59 +01:00
i915_memcpy.c drm/i915: Align start for memcpy_from_wc 2019-12-11 22:40:41 +00:00
i915_memcpy.h drm/i915: Align start for memcpy_from_wc 2019-12-11 22:40:41 +00:00
i915_mm.c
i915_params.c drm/i915/lmem: add the fake lmem region 2019-10-31 20:41:47 +00:00
i915_params.h drm/i915/lmem: add the fake lmem region 2019-10-31 20:41:47 +00:00
i915_pci.c drm/i915/perf: Register sysctl path globally 2019-12-13 20:16:23 +00:00
i915_perf_types.h drm/i915/perf: Register sysctl path globally 2019-12-13 20:16:23 +00:00
i915_perf.c drm/i915: Remove i915->kernel_context 2019-12-21 16:37:10 +00:00
i915_perf.h drm/i915/perf: Register sysctl path globally 2019-12-13 20:16:23 +00:00
i915_pmu.c drm/i915/pmu: Ensure monotonic rc6 2019-12-18 15:23:41 +00:00
i915_pmu.h drm/i915/pmu: Ensure monotonic rc6 2019-12-18 15:23:41 +00:00
i915_priolist_types.h
i915_pvinfo.h
i915_query.c drm/i915/query: Align flavour of engine data lookup 2019-11-25 15:08:24 +02:00
i915_query.h
i915_reg.h drm/i915/tgl: Gen-12 render decompression 2019-12-23 13:50:57 +02:00
i915_request.c drm/i915: Mark the GEM context link as RCU protected 2019-12-23 13:08:47 +00:00
i915_request.h drm/i915: Mark the GEM context link as RCU protected 2019-12-23 13:08:47 +00:00
i915_scatterlist.c
i915_scatterlist.h
i915_scheduler_types.h
i915_scheduler.c drm/i915: Drop GEM context as a direct link from i915_request 2019-12-20 10:52:21 +00:00
i915_scheduler.h drm/i915: Use a ctor for TYPESAFE_BY_RCU i915_request 2019-11-22 10:47:38 +00:00
i915_selftest.h drm/i915/selftests: Perform some basic cycle counting of MI ops 2019-11-11 18:30:13 +00:00
i915_suspend.c
i915_suspend.h
i915_sw_fence_work.c drm/i915: Unpin vma->obj on early error 2019-12-18 10:13:03 +00:00
i915_sw_fence_work.h
i915_sw_fence.c drm/i915: Propagate errors on awaiting already signaled dma-fences 2019-12-06 19:09:46 +00:00
i915_sw_fence.h drm/i915: Check for error before calling cmpxchg() 2019-12-06 19:09:33 +00:00
i915_switcheroo.c drm: Avoid drm_global_mutex for simple inc/dec of dev->open_count 2020-01-24 17:41:34 +00:00
i915_switcheroo.h
i915_syncmap.c
i915_syncmap.h
i915_sysfs.c drm/i915/rps: Add frequency translation helpers 2019-12-13 22:22:05 +00:00
i915_sysfs.h
i915_trace_points.c
i915_trace.h drm/i915: Rename pipe update tracepoints 2019-12-19 22:29:58 +02:00
i915_user_extensions.c
i915_user_extensions.h
i915_utils.c drm-misc-next for v5.6: 2019-12-17 13:57:54 +01:00
i915_utils.h drm/i915: Improve i915_inject_probe_error macro 2019-12-12 12:35:17 +00:00
i915_vgpu.c
i915_vgpu.h
i915_vma.c drm/i915: Introduce a vma.kref 2019-12-23 12:31:54 +00:00
i915_vma.h drm/i915: Introduce a vma.kref 2019-12-23 12:31:54 +00:00
intel_csr.c
intel_csr.h
intel_device_info.c drm/i915/cml: Separate U series pci id from origianl list. 2019-12-12 22:15:16 +02:00
intel_device_info.h drm/i915: Flesh out device_info pretty printer 2019-12-09 09:58:51 +00:00
intel_gvt.c
intel_gvt.h
intel_memory_region.c drm/i915/gem: Apply lmem size restriction to get_pages 2019-12-16 23:13:12 +00:00
intel_memory_region.h drm/i915/lmem: add the fake lmem region 2019-10-31 20:41:47 +00:00
intel_pch.c drm/i915: Fix detection for a CMP-V PCH 2019-11-18 16:36:03 +02:00
intel_pch.h drm/i915: Fix detection for a CMP-V PCH 2019-11-18 16:36:03 +02:00
intel_pm.c i915 features for v5.6: 2019-12-27 15:25:04 +10:00
intel_pm.h drm/i915: Pass dev_priv to ilk_disable_lp_wm() 2019-12-04 15:37:30 +02:00
intel_region_lmem.c drm/i915/lmem: fixup fake lmem teardown 2019-11-06 14:34:10 +00:00
intel_region_lmem.h drm/i915/lmem: add the fake lmem region 2019-10-31 20:41:47 +00:00
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: Mark up the calling context for intel_wakeref_put() 2019-11-25 15:29:17 +02:00
intel_wakeref.h drm/i915: Mark up the calling context for intel_wakeref_put() 2019-11-25 15:29:17 +02:00
intel_wopcm.c
intel_wopcm.h
Kconfig drm/i915: Put future HW and their uAPIs under STAGING & BROKEN 2019-10-27 15:47:10 +00:00
Kconfig.debug Merge drm/drm-next into drm-intel-next-queued 2019-12-11 11:13:50 +02:00
Kconfig.profile drm/i915: Default to a more lenient forced preemption timeout 2019-11-27 10:12:14 +02:00
Kconfig.unstable drm/i915/lmem: add the fake lmem region 2019-10-31 20:41:47 +00:00
Makefile drm/i915/gt: Move pm debug files into a gt aware debugfs 2019-12-22 15:25:10 +00:00