- 13 Oct, 2016 3 commits
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Tvrtko Ursulin authored
Pack the struct _sdvo_cmd_name to save 736 bytes of .rodata. This is fine since the name pointers are used only for debug. Signed-off-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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Tvrtko Ursulin authored
unsigned long is too wide - use smaller types in struct cxsr_latency to save 800-something bytes of .rodata. v2: All data even fits in u16 for even more saving. (Ville Syrjala) v3: Move bitfields to the end of the struct. (Joonas Lahtinen) Signed-off-by:
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Imre Deak authored
Currently resuming on HSW from S3 pm_test/devices state leads to an unrecoverable GPU hang. Resetting the GPU during suspend fixes this. For a full S3 cycle this change only means the reset happens earlier (before reaching S3). For S4 the reset will happen now both during the freeze and quiesce phases, which is a benefit since it will guarantee that the GPU is idle before creating and loading the hibernation image. Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Suggested-by:
Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Imre Deak <imre.deak@intel.com> Reviewed-by:
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- 12 Oct, 2016 11 commits
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Chris Wilson authored
Treat a framebuffer reference with the same priority as an active reference whilst shrinking. Framebuffers are likely to be reused and typically cost more to migrate to and from GPU memory (on LLC architectures we need to clflush), so defer the temptation to purge them during a kswapd run until we have run out of cheap buffers. Signed-off-by:
John Harrison <john.c.harrison@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161012124824.23521-1-chris@chris-wilson.co.uk
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Chris Wilson authored
The current meaning of whether an object has a GGTT vma is very ill-defined (and note we don't check for any partials either), it just means that at some point it was in the GGTT but it may not be now. The information we really care about here is whether it is taking up precious mappable aperture space. This is the obj->fault_mappable flag. We have a redundant long form reprinting of this information, so remove that in favour of the compact flag. Signed-off-by:
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Chris Wilson authored
During rpm resume we restore the fences, but we do not have the protection of struct_mutex. This rules out updating the activity tracking on the fences, and requires us to rely on the rpm as the serialisation barrier instead. [ 350.298052] [drm:intel_runtime_resume [i915]] Resuming device [ 350.308606] [ 350.310520] =============================== [ 350.315560] [ INFO: suspicious RCU usage. ] [ 350.320554] 4.8.0-rc8-bsw-rapl+ #3133 Tainted: G U W [ 350.327208] ------------------------------- [ 350.331977] ../drivers/gpu/drm/i915/i915_gem_request.h:371 suspicious rcu_dereference_protected() usage! [ 350.342619] [ 350.342619] other info that might help us debug this: [ 350.342619] [ 350.351593] [ 350.351593] rcu_scheduler_active = 1, debug_locks = 0 [ 350.358952] 3 locks held by Xorg/320: [ 350.363077] #0: (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffffa030589c>] drm_modeset_lock_all+0x3c/0xd0 [drm] [ 350.375162] #1: (crtc_ww_class_acquire){+.+.+.}, at: [<ffffffffa03058a6>] drm_modeset_lock_all+0x46/0xd0 [drm] [ 350.387022] #2: (crtc_ww_class_mutex){+.+.+.}, at: [<ffffffffa0305056>] drm_modeset_lock+0x36/0x110 [drm] [ 350.398236] [ 350.398236] stack backtrace: [ 350.403196] CPU: 1 PID: 320 Comm: Xorg Tainted: G U W 4.8.0-rc8-bsw-rapl+ #3133 [ 350.412457] Hardware name: Intel Corporation CHERRYVIEW C0 PLATFORM/Braswell CRB, BIOS BRAS.X64.X088.R00.1510270350 10/27/2015 [ 350.425212] 0000000000000000 ffff8801680a78c8 ffffffff81332187 ffff88016c5c5000 [ 350.433611] 0000000000000001 ffff8801680a78f8 ffffffff810ca6da ffff88016cc8b0f0 [ 350.442012] ffff88016cc80000 ffff88016cc80000 ffff880177ad0000 ffff8801680a7948 [ 350.450409] Call Trace: [ 350.453165] [<ffffffff81332187>] dump_stack+0x67/0x90 [ 350.458931] [<ffffffff810ca6da>] lockdep_rcu_suspicious+0xea/0x120 [ 350.466002] [<ffffffffa039e8dd>] fence_update+0xbd/0x670 [i915] [ 350.472766] [<ffffffffa039efe2>] i915_gem_restore_fences+0x52/0x70 [i915] [ 350.480496] [<ffffffffa0368f42>] vlv_resume_prepare+0x72/0x570 [i915] [ 350.487839] [<ffffffffa0369802>] intel_runtime_resume+0x102/0x210 [i915] [ 350.495442] [<ffffffff8137f26f>] pci_pm_runtime_resume+0x7f/0xb0 [ 350.502274] [<ffffffff8137f1f0>] ? pci_restore_standard_config+0x40/0x40 [ 350.509883] [<ffffffff814401c5>] __rpm_callback+0x35/0x70 [ 350.516037] [<ffffffff8137f1f0>] ? pci_restore_standard_config+0x40/0x40 [ 350.523646] [<ffffffff81440224>] rpm_callback+0x24/0x80 [ 350.529604] [<ffffffff8137f1f0>] ? pci_restore_standard_config+0x40/0x40 [ 350.537212] [<ffffffff814417bd>] rpm_resume+0x4ad/0x740 [ 350.543161] [<ffffffff81441aa1>] __pm_runtime_resume+0x51/0x80 [ 350.549824] [<ffffffffa03889c8>] intel_runtime_pm_get+0x28/0x90 [i915] [ 350.557265] [<ffffffffa0388a53>] intel_display_power_get+0x23/0x50 [i915] [ 350.565001] [<ffffffffa03ef23d>] intel_atomic_commit_tail+0xdfd/0x10b0 [i915] [ 350.573106] [<ffffffffa034b2e9>] ? drm_atomic_helper_swap_state+0x159/0x300 [drm_kms_helper] [ 350.582659] [<ffffffff81615091>] ? _raw_spin_unlock+0x31/0x50 [ 350.589205] [<ffffffffa034b2e9>] ? drm_atomic_helper_swap_state+0x159/0x300 [drm_kms_helper] [ 350.598787] [<ffffffffa03ef8a5>] intel_atomic_commit+0x3b5/0x500 [i915] [ 350.606319] [<ffffffffa03061dc>] ? drm_atomic_set_crtc_for_connector+0xcc/0x100 [drm] [ 350.615209] [<ffffffffa0306b49>] drm_atomic_commit+0x49/0x50 [drm] [ 350.622242] [<ffffffffa034dee8>] drm_atomic_helper_set_config+0x88/0xc0 [drm_kms_helper] [ 350.631419] [<ffffffffa02f94ac>] drm_mode_set_config_internal+0x6c/0x120 [drm] [ 350.639623] [<ffffffffa02fa94c>] drm_mode_setcrtc+0x22c/0x4d0 [drm] [ 350.646760] [<ffffffffa02f0f19>] drm_ioctl+0x209/0x460 [drm] [ 350.653217] [<ffffffffa02fa720>] ? drm_mode_getcrtc+0x150/0x150 [drm] [ 350.660536] [<ffffffff810c984a>] ? __lock_is_held+0x4a/0x70 [ 350.666885] [<ffffffff81202303>] do_vfs_ioctl+0x93/0x6b0 [ 350.672939] [<ffffffff8120f843>] ? __fget+0x113/0x200 [ 350.678797] [<ffffffff8120f735>] ? __fget+0x5/0x200 [ 350.684361] [<ffffffff81202964>] SyS_ioctl+0x44/0x80 [ 350.690030] [<ffffffff81001deb>] do_syscall_64+0x5b/0x120 [ 350.696184] [<ffffffff81615ada>] entry_SYSCALL64_slow_path+0x25/0x25 Note we also have to remember the lesson from commit 4fc788f5 ("drm/i915: Flush delayed fence releases after reset") where we have to flush any changes to the fence on restore. v2: Replace call to release user mmaps with an assertion that they have already been zapped. Fixes: 49ef5294 ("drm/i915: Move fence tracking from object to vma") Reported-by:Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
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Chris Wilson authored
Our error states are quickly growing, pinning kernel memory with them. The majority of the space is taken up by the error objects. These compress well using zlib and without decode are mostly meaningless, so encoding them does not hinder quickly parsing the error state for familiarity. v2: Make the zlib dependency optional Signed-off-by:
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Chris Wilson authored
Leave all the pretty printing to userspace and simplify the error capture to only have a single common object printer. It makes the kernel code more compact, and the refactoring allows us to apply more complex transformations like compressing the output. Signed-off-by:
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Chris Wilson authored
Since the GTT provides universal access to any GPU page, we can use it to reduce our plethora of read methods to just one. It also has the important characteristic of being exactly what the GPU sees - if there are incoherency problems, seeing the batch as executed (rather than as trapped inside the cpu cache) is important. Signed-off-by:
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Chris Wilson authored
The error state is purposefully racy as we expect it to be called at any time and so have avoided any locking whilst capturing the crash dump. However, with multi-engine GPUs and multiple CPUs, those races can manifest into OOPSes as we attempt to chase dangling pointers freed on other CPUs. Under discussion are lots of ways to slow down normal operation in order to protect the post-mortem error capture, but what it we take the opposite approach and freeze the machine whilst the error capture runs (note the GPU may still running, but as long as we don't process any of the results the driver's bookkeeping will be static). Note that by of itself, this is not a complete fix. It also depends on the compiler barriers in list_add/list_del to prevent traversing the lists into the void. We also depend that we only require state from carefully controlled sources - i.e. all the state we require for post-mortem debugging should be reachable from the request itself so that we only have to worry about retrieving the request carefully. Once we have the request, we know that all pointers from it are intact. v2: Avoid drm_clflush_pages() inside stop_machine() as it may use stop_machine() itself for its wbinvd fallback. Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161012090522.367-3-chris@chris-wilson.co.uk
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Chris Wilson authored
We currently capture the GPU state after we detect a hang. This is vital for us to both triage and debug hangs in the wild (post-mortem debugging). However, it comes at the cost of running some potentially dangerous code (since it has to make very few assumption about the state of the driver) that is quite resource intensive. This patch introduces both a method to disable error capture at runtime (for users who hit bugs at runtime and need a workaround) and to disable error capture at compiletime (for realtime users who want to minimise any possible latency, and never require error capture, saving ~30k of code). The cost is that we now have to be wary of (and test!) a kconfig flag and a module parameter. The effect of the module parameter is easy to verify through code inspection and runtime testing, but a kconfig flag needs regular compile checking. Signed-off-by:
Jani Nikula <jani.nikula@linux.intel.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch Link: http://patchwork.freedesktop.org/patch/msgid/20161012090522.367-2-chris@chris-wilson.co.uk
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Chris Wilson authored
In the next patch, I want to conditionally compile i915_gpu_error.c and that requires moving the functions used by debug out of i915_gpu_error.c! Signed-off-by:
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Joonas Lahtinen authored
Remove never used BSM{,_MASK}. BSM_MASK #define also causes a warning. include/drm/i915_drm.h:96:34: warning: result of ‘65535 << 20’ requires 37 bits to represent, but ‘int’ only has 32 bits [-Wshiftoverflow=] #define INTEL_BSM_MASK (0xFFFF << 20) Reported-by:Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Daniel Vetter authored
It's been over two months, git definitely lost it's marbles. Conflicts resolved by picking our version, plus manually checking the diff with the parent in drm-intel-next-queued to make sure git didn't do anything stupid. It did, so I removed 2 occasions where it double-inserted a bit of code. The diff is now just - kernel-doc changes - drm format/name changes - display-info changes so looks all reasonable. Signed-off-by:Daniel Vetter <daniel.vetter@intel.com>
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- 11 Oct, 2016 14 commits
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
Just flushing out my -misc queue. Slightly important are the prime refcount/unload fixes from Chris. There's also the reservation stuff from Chris still pending, and Sumits hasn't landed that yet. Might get another pull for that, but pls don't hold up the main pull for it ;-) * tag 'topic/drm-misc-2016-10-11' of git://anongit.freedesktop.org/drm-intel: drm/crtc: constify drm_crtc_index parameter drm: use the right function name in documentation drm: Release resources with a safer function drm: Fix up kerneldoc for new drm_gem_dmabuf_export() drm/bridge: Drop drm_connector_unregister and call drm_connector_cleanup directly drm/fb-helper: fix sphinx markup for DRM_FB_HELPER_DEFAULT_OPS drm/bridge: Add RGB to VGA bridge support drm/prime: Take a ref on the drm_dev when exporting a dma_buf drm/prime: Pass the right module owner through to dma_buf_export() drm/bridge: Call drm_connector_cleanup directly drm: simple_kms_helper: Add prepare_fb and cleanup_fb hooks drm: Release resources with a safer function
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Dave Airlie authored
Merge tag 'drm-intel-next-fixes-2016-10-11' of git://anongit.freedesktop.org/drm-intel into drm-next A big bunch of i915 fixes for drm-next / v4.9 merge window, with more than half of them also cc: stable. We also continue to have more Fixes: annotations for our fixes, which should help the backporters and archeologists. * tag 'drm-intel-next-fixes-2016-10-11' of git://anongit.freedesktop.org/drm-intel: (27 commits) drm/i915: Fix conflict resolution from backmerge of v4.8-rc8 to drm-next drm/i915/guc: Unwind GuC workqueue reservation if request construction fails drm/i915: Reset the breadcrumbs IRQ more carefully drm/i915: Force relocations via cpu if we run out of idle aperture drm/i915: Distinguish last emitted request from last submitted request drm/i915: Allow DP to work w/o EDID drm/i915: Move long hpd handling into the hotplug work drm/i915/execlists: Reinitialise context image after GPU hang drm/i915: Use correct index for backtracking HUNG semaphores drm/i915: Unalias obj->phys_handle and obj->userptr drm/i915: Just clear the mmiodebug before a register access drm/i915/gen9: only add the planes actually affected by ddb changes drm/i915: Allow PCH DPLL sharing regardless of DPLL_SDVO_HIGH_SPEED drm/i915/bxt: Fix HDMI DPLL configuration drm/i915/gen9: fix the watermark res_blocks value drm/i915/gen9: fix plane_blocks_per_line on watermarks calculations drm/i915/gen9: minimum scanlines for Y tile is not always 4 drm/i915/gen9: fix the WaWmMemoryReadLatency implementation drm/i915/kbl: KBL also needs to run the SAGV code drm/i915: introduce intel_has_sagv() ...
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Paulo Zanoni authored
With the previous code we were only recomputing the DDB partitioning for the CRTCs included in the atomic commit, so any other active CRTCs would end up having their DDB registers zeroed. In this patch we make sure that the computed state starts as a copy of the current partitioning, and then we only zero the DDBs that we're actually going to recompute. How to reproduce the bug: 1 - Enable the primary plane on pipe A 2 - Enable the primary plane on pipe B 3 - Enable the cursor or sprite plane on pipe A Step 3 will zero the DDB partitioning for pipe B since it's not included in the commit that enabled the cursor or sprite for pipe A. I expect this to fix many FIFO underrun problems on gen9+. v2: - Mention the cursor on the steps to reproduce the problem (Paulo). - Add Testcase tag provided by Maarten (Maarten). Testcase: kms_cursor_legacy.cursorA-vs-flipB-atomic-transitions Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96226 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96828 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97450 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97596 Bugzilla: https://www.phoronix.com/scan.php?page=news_item&px=Intel-Skylake-Multi-Screen-Woes Cc: stable@vger.kernel.org Signed-off-by:
Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by:
Lyude <cpaul@redhat.com> Link: http://patchwork.freedesktop.org/patch/msgid/1475602652-17326-1-git-send-email-paulo.r.zanoni@intel.com
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Jani Nikula authored
We'll be getting a function and a table for dp parameters soon enough, so rename the function and table for hdmi. No functional changes. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
Libin Yang <libin.yang@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/3d1c61cab70b6a2966db9b6115b76edbd747a835.1476111629.git.jani.nikula@intel.com
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Jani Nikula authored
Have generic macros in line with the rest of the register bit definition macros instead of a dedicated function in intel_audio.c, and use them. No functional changes. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
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Libin Yang authored
HDMI audio should use crtc_clock to get the TMDS clock. This patch renames mode to adjusted_mode to unify the name. Reviewed-by:
Libin Yang <libin.yang@linux.intel.com> Signed-off-by:
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Libin Yang authored
This patch applies setting proper N/M, N/CTS on more platforms. Reviewed-by:
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Jani Nikula authored
The code for dp and hdmi are already different, and they're about to diverge even more. Split them for clarity in future work. No functional changes. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
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Jani Nikula authored
It gets fragile to duplicate the code for updating HSW_AUD_CFG. The only change should be that the hdmi pixel clock is also updated in i915_audio_component_sync_audio_rate(), but it should not be any different. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
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Jani Nikula authored
If it was wrong, we'd be screwed already. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
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Jani Nikula authored
Prepare for using the same code for updating HSW_AUD_CFG register. No functional changes. Cc: Libin Yang <libin.yang@linux.intel.com> Reviewed-by:
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Chris Wilson authored
If we want to know how many pages a VMA spans, we can use vma_pages() to find out. We have one such invocation inside our faulthandler, so convert it. (We have two other that want the size in bytes rather than pages, food for future thought.) Signed-off-by:
Matthew Auld <matthew.auld@intel.com>
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Chris Wilson authored
commit 1625e7e5 ("drm/i915: make compact dma scatter lists creation work with SWIOTLB backend") took a heavy handed approach to undo the scatterlist compaction in the face of SWIOTLB. (The compaction hit a bug whereby we tried to pass a segment larger than SWIOTLB could handle.) We can be a little more intelligent and try compacting the scatterlist up to the maximum SWIOTLB segment size (when using SWIOTLB). v2: Tidy sg_mark_end() and cpp Signed-off-by:
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161011082021.14606-2-chris@chris-wilson.co.uk
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Chris Wilson authored
When we notice the system under memory pressure, we try to evict some driver pages before asking the VM to shrink all caches. As a final step in that process, we tried to evict everything, including active buffers. This is harming ourselves, and we can mix shrinking all caches as well as our residual buffers (after the first pass of trying to shrink just our own buffers). Signed-off-by:
Michał Winiarski <michal.winiarski@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161011082021.14606-1-chris@chris-wilson.co.uk
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- 10 Oct, 2016 12 commits
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Jani Nikula authored
Signed-off-by:
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Chris Wilson authored
The conflict resolution of v4.8-rc8 backmerge to drm-next pulled back in a few lines of dead code due to the code movement around i915_gem_reset(), fix that up. Fixes: ca09fb9f ("Merge tag 'v4.8-rc8' into drm-next") Signed-off-by:
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Chris Wilson authored
We reserve space in the GuC workqueue for submitting the request in the future. However, if we fail to construct the request, we need to give that reserved space back to the system. Fixes: dadd481b ("drm/i915/guc: Prepare for nonblocking execbuf submission") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97978Signed-off-by:
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Chris Wilson authored
Along with the interrupt, we want to restore the fake-irq and wait-timeout detection. If we use the breadcrumbs interface to setup the interrupt as it wants, the auxiliary timers will also be restored. v2: Cancel both timers as well, sanitize the IMR. Fixes: 821ed7df ("drm/i915: Update reset path to fix incomplete requests") Signed-off-by:
Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161007065327.24515-3-chris@chris-wilson.co.uk (cherry picked from commit ad07dfcd) Signed-off-by:
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Chris Wilson authored
If we run out of enough aperture space to fit the entire object, we fallback to trying to insert a single page. However, if that also fails, we currently fail to userspace with an unexpected ENOSPC. (ENOSPC means to userspace that their batch could not be fitted within the GTT.) Prior to commit e8cb909a ("drm/i915: Fallback to single page GTT mmappings for relocations") the approach is to fallback to using the slow CPU relocation path in case of iomapping failure, and that is the behaviour we need to restore. Fixes: e8cb909a ("drm/i915: Fallback to single page GTT mmappings...") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98101Signed-off-by:
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Chris Wilson authored
In order not to trigger hangcheck on a idle-but-waiting engine, we need to distinguish between the pending request queue and the actual execution queue. This is done later in "drm/i915: Enable multiple timelines" but for now we need a temporary fix to prevent blaming the wrong engine for a GPU hang. (Note that this causes a temporary subtle change in how we decide when to allow a waitboost to be re-awarded back to the waiter, the temporary effect is that if the wait is upon the most current execution the wait is given for free, instead of checking to see if the client stalled itself. This will be repaired in "drm/i915: Enable multiple timelines".) Fixes: 0a046a0e ("drm/i915: Nonblocking request submission") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98104Signed-off-by:
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Ville Syrjälä authored
Allow returning "connected" or "unknown" connector status for DP branch devices that don't have an EDID. Currently we'd claim the thing as "disconnected" if there is no EDID. This stuff used to broken already, I think, but it got more broken by commit f21a2198 ("drm/i915: Splitting intel_dp_detect") Cc: Damien Cassou <damien@cassou.me> Cc: freedesktop.org@gp.mailgun.org Cc: Arno <blouin.arno@gmail.com> Cc: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com> Cc: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com> Cc: Ander Conselvan de Oliveira <conselvan2@gmail.com> Cc: stable@vger.kernel.org Tested-by:
Arno <blouin.arno@gmail.com> Fixes: f21a2198 ("drm/i915: Splitting intel_dp_detect") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83348Signed-off-by:
Ander Conselvan de Oliveira <conselvan2@gmail.com> (cherry picked from commit 5cb651a7) Signed-off-by:
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Ville Syrjälä authored
We can't rely on connector->status in the detect() hook if the long hpd was already handled by the dig_port_work as that won't update connector->status. Thus we have to defer the long hpd handling entirely until the hotplug work runs to avoid the double long hpd handling the "detect_done" flag is trying to prevent. We'll start to depend on connector->status being up to date in a following patch. Cc: Damien Cassou <damien@cassou.me> Cc: freedesktop.org@gp.mailgun.org Cc: Arno <blouin.arno@gmail.com> Cc: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com> Cc: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com> Cc: Ander Conselvan de Oliveira <conselvan2@gmail.com> Cc: stable@vger.kernel.org Tested-by:
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Chris Wilson authored
On Braswell, at least, we observe that the context image is written in multiple phases. The first phase is to clear the register state, and subsequently rewrite it. A GPU reset at the right moment can interrupt the context update leaving it corrupt, and our update of the RING_HEAD is not sufficient to restart the engine afterwards. To recover, we need to reset the registers back to their original values. The context state is lost. What we need is a better mechanism to serialise the reset with pending flushes from the GPU. Fixes: 821ed7df ("drm/i915: Update reset path to fix incomplete requests") Signed-off-by:
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Chris Wilson authored
When decoding the semaphores inside hangcheck, we need to use the hw-id and not the local array index. Fixes: de1add36 ("drm/i915: Decouple execbuf uAPI ...") Testcase: igt/gem_exec_whisper/hang # gen6-7 Signed-off-by:
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Chris Wilson authored
We use obj->phys_handle to choose the pread/pwrite path, but as obj->phys_handle is a union with obj->userptr, we then mistakenly use the phys_handle path for userptr objects within pread/pwrite. Testcase: igt/gem_userptr_blits/forbidden-operations Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97519Signed-off-by:
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Chris Wilson authored
When we enable the per-register access mmiodebug, it is to detect which access is illegal. Reporting on earlier untraced access outside of the mmiodebug does not help debugging (as the suspicion is immediately put upon the current register which is not at fault)! References: https://bugs.freedesktop.org/show_bug.cgi?id=97985Signed-off-by:
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