- 26 Nov, 2020 3 commits
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Chris Wilson authored
Pull the repeated check for the last active request being completed to a single spot, when deciding whether or not execlist preemption is required. In doing so, we remove the tasklet kick, introduced with the completion checks in commit 35f3fd81 ("drm/i915/execlists: Workaround switching back to a completed context"), if we find the request was completed but have not yet seen the corresponding CS event. This was devolving into a busy spin of the tasklet while we waited for the event as the delivery was not as instantaneous as expected. Under load this is sufficient to exhaust the tasklet softirq timeslice, and force ksoftirqd. Quite noticeable overhead for no apparent improvement in latency. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201126140407.31952-2-chris@chris-wilson.co.uk
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Chris Wilson authored
Since the introduction of preempt-to-busy, requests can complete in the background, even while they are not on the engine->active.requests list. As such, the engine->active.request list itself is not in strict retirement order, and we have to scan the entire list while unwinding to not miss any. However, if the request is completed we currently leave it on the list [until retirement], but we could just as simply remove it and stop treating it as active. We would only have to then traverse it once while unwinding in quick succession. Signed-off-by:
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Chris Wilson authored
Ville noticed that the last mocs entry is used unconditionally by the HW when it performs cache evictions, and noted that while the value is not meant to be writable by the driver, we should program it to a reasonable value nevertheless. As it turns out, we can change the value of mocs:63 and the value we were programming into it would cause hard hangs in conjunction with atomic operations. v2: Add details from bspec about how it is used by HW Suggested-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2707 Fixes: 3bbaba0c ("drm/i915: Added Programming of the MOCS") Signed-off-by:
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- 24 Nov, 2020 2 commits
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Tvrtko Ursulin authored
CT event handler is called under the gt->irq_lock from the interrupt handling paths so make it the same from the init path. I don't think this mismatch caused any functional issue but we need to wean the code of the global i915->irq_lock. Signed-off-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201120095636.1987395-2-tvrtko.ursulin@linux.intel.com
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Tvrtko Ursulin authored
Guc->mmio_msg is set under the guc->irq_lock in guc_get_mmio_msg so it should be consumed under the same lock from guc_handle_mmio_msg. I am not sure if the overall flow here makes complete sense but at least the correct lock is now used. Signed-off-by:
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- 23 Nov, 2020 4 commits
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Chris Wilson authored
Since preempt-to-busy, we may unsubmit a request while it is still on the HW and completes asynchronously. That means it may be retired and in the process destroy the virtual engine (as the user has closed their context), but that engine may still be holding onto the unsubmitted compelted request. Therefore we need to potentially cleanup the old request on destroying the virtual engine. We also have to keep the virtual_engine alive until after the sibling's execlists_dequeue() have finished peeking into the virtual engines, for which we serialise with RCU. v2: Be paranoid and flush the tasklet as well. v3: And flush the tasklet before the engines, as the tasklet may re-attach an rb_node after our removal from the siblings. Fixes: 6d06779e ("drm/i915: Load balancing across a virtual engine") Signed-off-by:
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Chris Wilson authored
We currently want to keep the interrupt enabled until the interrupt after which we have no more work to do. This heuristic was broken by us kicking the irq-work on adding a completed request without attaching a signaler -- hence it appearing to the irq-worker that an interrupt had fired when we were idle. Fixes: 2854d866 ("drm/i915/gt: Replace intel_engine_transfer_stale_breadcrumbs") Signed-off-by:
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Chris Wilson authored
Make b->signaled_requests a lockless-list so that we can manipulate it outside of the b->irq_lock. Signed-off-by:
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Chris Wilson authored
Move the register slow register write and readback from out of the critical path for execlists submission and delay it until the following worker, shaving off around 200us. Note that the same signal_irq_work() is allowed to run concurrently on each CPU (but it will only be queued once, once running though it can be requeued and reexecuted) so we have to remember to lock the global interactions as we cannot rely on the signal_irq_work() itself providing the serialisation (in constrast to a tasklet). By pushing the arm/disarm into the central signaling worker we can close the race for disarming the interrupt (and dropping its associated GT wakeref) on parking the engine. If we loose the race, that GT wakeref may be held indefinitely, preventing the machine from sleeping while the GPU is ostensibly idle. v2: Move the self-arming parking of the signal_irq_work to a flush of the irq-work from intel_breadcrumbs_park(). Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2271 Fixes: e2300560 ("drm/i915/gt: Hold context/request reference while breadcrumbs are active") Signed-off-by:
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- 21 Nov, 2020 1 commit
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Chris Wilson authored
The old IPS interface did not match the RPS interface that we tried to plug it into (bool vs int return). Once repaired, our minimal selftesting is finally happy! Signed-off-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201121190352.15996-1-chris@chris-wilson.co.uk
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- 20 Nov, 2020 3 commits
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Chris Wilson authored
If we run out of ring space, or exceed the desired runtime, we wish to stop the subtest. Put these checks together, so that we always keep the requests flushed on completion. Signed-off-by:
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Chris Wilson authored
Allow us to validate mocs configurations after reset if we have either engine or global reset. Signed-off-by:
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Chris Wilson authored
We print out the "logical" context support before we discover whether or not the engines have logical contexts. No one, except Tvrtko, seems to have noticed the error, so the debug message must not be useful to anyone. Signed-off-by:
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- 19 Nov, 2020 7 commits
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Tvrtko Ursulin authored
Include the signalers each request in the timeline is waiting on, as a means to try and identify the cause of a stall. This can be quite verbose, even as for now we only show each request in the timeline and its immediate antecedents. This generates output like: Timeline 886: { count 1, ready: 0, inflight: 0, seqno: { current: 664, last: 666 }, engine: rcs0 } U 886:29a- prio=0 @ 134ms: gem_exec_parall<4621> U bc1:27a- prio=0 @ 134ms: gem_exec_parall[4917] Timeline 825: { count 1, ready: 0, inflight: 0, seqno: { current: 802, last: 804 }, engine: vcs0 } U 825:324 prio=0 @ 107ms: gem_exec_parall<4518> U b75:140- prio=0 @ 110ms: gem_exec_parall<5486> Timeline b46: { count 1, ready: 0, inflight: 0, seqno: { current: 782, last: 784 }, engine: vcs0 } U b46:310- prio=0 @ 70ms: gem_exec_parall<5428> U c11:170- prio=0 @ 70ms: gem_exec_parall[5501] Timeline 96b: { count 1, ready: 0, inflight: 0, seqno: { current: 632, last: 634 }, engine: vcs0 } U 96b:27a- prio=0 @ 67ms: gem_exec_parall<4878> U b75:19e- prio=0 @ 67ms: gem_exec_parall<5486> Signed-off-by: -
Chris Wilson authored
Lift the list iteration defines for traversing the signaler/waiter lists into i915_scheduler.h for reuse. Signed-off-by:
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Chris Wilson authored
Include the active timelines for debugfs/i915_engine_info, so that we can see which have unready requests inflight which are not shown otherwise. Suggested-by:
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Chris Wilson authored
We plan to expand upon the number of available statuses for when we pretty-print the requests along the timelines, and so need a new set of flags. We have settled upon: Unready [U] - initial status after being submitted, the request is not ready for execution as it is waiting for external fences Ready [R] - all fences the request was waiting on have been signaled, and the request is now ready for execution and will be in a backend queue - a ready request may still need to wait on semaphores [internal fences] Ready/virtual [V] - same as ready, but queued over multiple backends Executing [E] - the request has been transferred from the backend queue and submitted for execution on HW - a completed request may still be regarded as executing, its status may not be updated until it is retired and removed from the lists Signed-off-by: -
Chris Wilson authored
Extract i915_request_show for reuse in other request chain pretty printers. For a bonus point, quietly change the seqno format from %llx to %lld to match everywhere else. Signed-off-by:
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Chris Wilson authored
When pretty-printing the requests for debug, also show the status of any semaphore waits as part of its runnable status. Signed-off-by:
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Chris Wilson authored
Just a normal comment, not a kerneldoc function description. drivers/gpu/drm/i915/gvt/handlers.c:1666: warning: Function parameter or member 'vgpu' not described in 'bxt_ppat_low_write' drivers/gpu/drm/i915/gvt/handlers.c:1666: warning: Function parameter or member 'offset' not described in 'bxt_ppat_low_write' drivers/gpu/drm/i915/gvt/handlers.c:1666: warning: Function parameter or member 'p_data' not described in 'bxt_ppat_low_write' drivers/gpu/drm/i915/gvt/handlers.c:1666: warning: Function parameter or member 'bytes' not described in 'bxt_ppat_low_write' Signed-off-by:
Zhenyu Wang <zhenyuw@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201103204307.15723-1-chris@chris-wilson.co.uk
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- 18 Nov, 2020 1 commit
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Chris Wilson authored
Since we allocate some breadcrumbs for the virtual engine, and the virtual engine has a custom destructor, we also need to free the breadcrumbs after use. Fixes: b3786b29 ("drm/i915/gt: Distinguish the virtual breadcrumbs from the irq breadcrumbs") Signed-off-by:
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- 17 Nov, 2020 2 commits
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Chris Wilson authored
The presumption was that some time would always elapse between recording the start and the finish of a context switch. This turns out to be a regular occurrence and emitting a debug statement superfluous. Signed-off-by:
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Lucas De Marchi authored
Just like for rkl and tgl, this should be permanent as well for dg1 instead just for A0. The commit making it permanent for those platforms ended up "racing" with the commit adding the DG1 WAs, so now fix that up. v2: Add "tgl,dg1" to WA comment (Matt) Cc: Swathi Dhanavanthri <swathi.dhanavanthri@intel.com> Signed-off-by:
Lucas De Marchi <lucas.demarchi@intel.com> Reviewed-by:
Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201027043228.696518-3-lucas.demarchi@intel.com
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- 16 Nov, 2020 3 commits
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Zhang Xiaoxu authored
If intel context create failed, the perf_request_latency() will return 0 rather than error, because we doesn't initialize the return value. Fixes: 25c26f18 ("drm/i915/selftests: Measure dispatch latency") Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
Zhang Xiaoxu <zhangxiaoxu5@huawei.com> Reviewed-by:
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Zhang Xiaoxu authored
If intel context create failed, the perf_series_engines() will return 0 rather than error, because we doesn't initialize the return value. Fixes: cbfd3a0c ("drm/i915/selftests: Add request throughput measurement to perf") Reported-by:
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Tvrtko Ursulin authored
I forgot to free the old list when growing past 16 entries. Luckily, as much as I checked, none of the current platforms has more than 16 workarounds on a single list. Signed-off-by:
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- 15 Nov, 2020 1 commit
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git://github.com/skeggsb/linuxDave Airlie authored
-next fix for type stuff. Signed-off-by:
Dave Airlie <airlied@redhat.com> From: Ben Skeggs <skeggsb@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/CACAvsv5vuM54oU1Yp8sX5ZVmJAv+-oQRQj-AeaKFb3qs1EtP-g@mail.gmail.com
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- 14 Nov, 2020 1 commit
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Ben Skeggs authored
Pre-NV50 chipsets don't currently use the MMU subsystem that later chipsets use, and type_vram is negative here, leading to an OOB memory access. This was previously guarded by a chipset check, restore that. Reported-by:
Thomas Zimmermann <tzimmermann@suse.de> Fixes: 5839172f ("drm/nouveau: explicitly specify caching to use") Signed-off-by:
Ben Skeggs <bskeggs@redhat.com> Reviewed-by:
Michael J. Ruhl <michael.j.ruhl@intel.com> Reviewed-by:
Christian König <christian.koenig@amd.com>
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- 13 Nov, 2020 3 commits
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Dave Airlie authored
Merge tag 'drm-intel-gt-next-2020-11-12-1' of git://anongit.freedesktop.org/drm/drm-intel into drm-next Cross-subsystem Changes: - DMA mapped scatterlist fixes in i915 to unblock merging of https://lkml.org/lkml/2020/9/27/70 (Tvrtko, Tom) Driver Changes: - Fix for user reported issue #2381 (Graphical output stops with "switching to inteldrmfb from simple"): Mark ininitial fb obj as WT on eLLC machines to avoid rcu lockup during fbdev init (Ville, Chris) - Fix for Tigerlake (and earlier) to avoid spurious empty CSB events leading to hang (Chris, Bruce) - Delay execlist processing for Tigerlake to avoid hang (Chris) - Fix for Tigerlake RCS engine health check through heartbeat (Chris) - Fix for Tigerlake reserved MOCS entries (Ayaz, Chris) - Fix Media power gate sequence on Tigerlake (Rodrigo) - Enable eLLC caching of display buffers for SKL+ (Ville) - Support parsing of oversize batches on Gen9 (Matt, Chris) - Exclude low pages (128KiB) of stolen from use to avoid thrashing during reset (Chris) - Flush engines before Tigerlake breadcrumbs (Chris) - Use the local HWSP offset during submission (Chris) - Flush coherency domains on first set-domain-ioctl (Chris, Zbigniew) - Use the active reference on the vma while capturing to avoid use-after-free (Chris) - Fix MOCS PTE setting for gen9+ (Ville) - Avoid NULL dereference on IPS driver callback while unbinding i915 (Chris) - Avoid NULL dereference from PT/PD stash allocation error (Matt) - Hold request reference for canceling an active context (Chris) - Avoid infinite loop on x86-32 when mapping a lot of objects (Chris) - Disallow WC mappings when processor doesn't support them (Chris) - Return correct error in i915_gem_object_copy_blt() error path (Dan) - Return correct error in intel_context_create_request() error path (Maarten) - Tune down GuC communication enabled/disabled messages to debug (Jani) - Fix rebased commit "Remove i915_request.lock requirement for execution callbacks" (Chris) - Cancel outstanding work after disabling heartbeats on an engine (Chris) - Signal cancelled requests (Chris) - Retire cancelled requests on unload (Chris) - Scrub HW state on driver remove (Chris) - Undo forced context restores after trivial preemptions (Chris) - Handle PCI unbind in PMU code (Tvrtko) - Fix CPU hotplug with multiple GPUs in PMU code (Trtkko) - Correctly set SFC capability for video engines (Venkata) - Update GuC code to use firmware v49.0.1 (John, Matthew B., Daniele, Oscar, Michel, Rodrigo, Michal) - Improve GuC warnings on loading failure (John) - Avoid ownership race in buffer pool by clearing age (Chris) - Use MMIO to read CSB in case of failure (Chris, Mika) - Show engine properties in engine state dump to indicate changes (Chris, Joonas) - Break up error capture compression loops with cond_resched() (Chris) - Reduce GPU error capture mutex hold time to avoid khungtaskd (Chris) - Serialise debugfs i915_gem_objects with ctx->mutex (Chris) - Always test execution status on closing the context and close if not persistent (Chris) - Avoid mixing integer types during batch copies (Chris, Jared) - Skip over MI_NOOP when parsing to avoid overhead (Chris) - Hold onto an explicit ref to i915_vma_work.pinned (Chris) - Perform all asynchronous waits prior to marking payload start (Chris) - Pull phys pread/pwrite implementations to the backend (Matt) - Improve record of hung engines in error state (Tvrtko) - Allow backends to override pread implementation (Matt) - Reinforce LRC poisoning checks to confirm context survives execution (Chris) - Fix memory region max size calculation (Matt) - Fix order when adding blocks to memory region (Matt) - Eliminate unused intel_virtual_engine_get_sibling func (Chris) - Cleanup kasan warning for on-stack (unsigned long) casting (Chris) - Onion unwind for scratch page allocation failure (Chris) - Poison stolen pages before use (Chris) - Selftest improvements (Chris) Signed-off-by:
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Dave Airlie authored
This all caps looked ugly. Signed-off-by: -
git://anongit.freedesktop.org/drm/drm-miscDave Airlie authored
drm-misc-next for 5.11: UAPI Changes: Cross-subsystem Changes: Core Changes: - Remove pgprot_decrypt() before calling io_remap_pfn_range() - Revert "drm/dp_mst: Retrieve extended DPCD caps for topology manager" - ttm: Add multihop infrastructure - doc: Update dma-buf Driver Changes: - amdgpu: Use TTM multihop - kmb: select DRM_MIPI_DSI and depend on ARCH_KEEMBAY; Fix build warning; Fix typos - nouveau: Use TTM multihop; Fix out-of-bounds access - radeon: Use TTM multihop - ingenic: Search for scaling coefficients to to 102% of screen size Signed-off-by:
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- 11 Nov, 2020 9 commits
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Colin Ian King authored
There are two spelling mistakes of the word sync in drm_info and drm_dbg messages. Fix these. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20201109111225.1485190-1-colin.king@canonical.com
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Anitha Chrisanthus authored
Fixed the following W=1 kernel build warnings drivers/gpu/drm/kmb/kmb_plane.h:74:18: warning: ‘kmb_formats_v’ defined but not used [-Wunused-const-variable=] drivers/gpu/drm/kmb/kmb_plane.h:61:18: warning: ‘kmb_formats_g’ defined but not used [-Wunused-const-variable=] Signed-off-by:
Anitha Chrisanthus <anitha.chrisanthus@intel.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Thomas Zimmermann authored
The value of struct drm_device.ttm.type_vram can become -1 for unknown types of memory (see nouveau_ttm_init()). This leads to an out-of-bounds error when accessing struct nvif_mmu.type[]: [ 18.304116] ================================================================== [ 18.311649] BUG: KASAN: slab-out-of-bounds in nouveau_ttm_io_mem_reserve+0x17a/0x7e0 [nouveau] [ 18.320415] Read of size 1 at addr ffff88810ffac1fe by task systemd-udevd/342 [ 18.327681] [ 18.329208] CPU: 1 PID: 342 Comm: systemd-udevd Tainted: G E 5.10.0-rc2-1-default+ #581 [ 18.338681] Hardware name: Dell Inc. OptiPlex 9020/0N4YC8, BIOS A24 10/24/2018 [ 18.346032] Call Trace: [ 18.348536] dump_stack+0xae/0xe5 [ 18.351919] print_address_description.constprop.0+0x17/0xf0 [ 18.357787] ? nouveau_ttm_io_mem_reserve+0x17a/0x7e0 [nouveau] [ 18.363818] __kasan_report.cold+0x20/0x38 [ 18.368099] ? nouveau_ttm_io_mem_reserve+0x17a/0x7e0 [nouveau] [ 18.374133] kasan_report+0x3a/0x50 [ 18.377789] nouveau_ttm_io_mem_reserve+0x17a/0x7e0 [nouveau] <...> [ 18.767690] Allocated by task 342: [ 18.773087] kasan_save_stack+0x1b/0x40 [ 18.778890] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 18.785646] __kmalloc_track_caller+0x1be/0x390 [ 18.792165] kstrdup_const+0x46/0x70 [ 18.797686] kobject_set_name_vargs+0x2f/0xb0 [ 18.803992] kobject_init_and_add+0x9d/0xf0 [ 18.810117] ttm_mem_global_init+0x12c/0x210 [ttm] [ 18.816853] ttm_bo_global_init+0x4a/0x160 [ttm] [ 18.823420] ttm_bo_device_init+0x39/0x220 [ttm] [ 18.830046] nouveau_ttm_init+0x2c3/0x830 [nouveau] [ 18.836929] nouveau_drm_device_init+0x1b4/0x3f0 [nouveau] <...> [ 19.105336] ================================================================== Fix this error, by not using type_vram as an index if it's negative. Assume default values instead. The error was seen on Nvidia G72 hardware. Signed-off-by:
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Jianxin Xiong authored
The fact that the size of dma-buf is invariant over the lifetime of the buffer is mentioned in the comment of 'dma_buf_ops.mmap', but is not documented at where the info is defined. Add the missing documentation. Signed-off-by:
Jianxin Xiong <jianxin.xiong@intel.com> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1605044477-51833-7-git-send-email-jianxin.xiong@intel.com
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Rodrigo Vivi authored
Some media power gates are disabled by default. commit 5d869230 ("drm/i915/tgl: Enable VD HCP/MFX sub-pipe power gating") tried to enable it, but it duplicated an existent register. So, the main PG setup sequences ended up overwriting it. So, let's now merge this to the main PG setup sequence. v2: (Chris): s/BIT/REG_BIT, remove useless comment, remove useless =0, use the right gt, remove rc6 sequence doubt from commit message. Fixes: 5d869230 ("drm/i915/tgl: Enable VD HCP/MFX sub-pipe power gating") Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: stable@vger.kernel.org#v5.5+ Cc: Dale B Stimson <dale.b.stimson@intel.com> Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
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Paul Cercueil authored
Increase the scaled image's theorical width/height until we find a configuration that has valid scaling coefficients, up to 102% of the screen's resolution. This makes sure that we can scale from almost every resolution possible at the cost of a very small distorsion. The CRTC_W / CRTC_H are not modified. This algorithm was already in place but would not try to go above the screen's resolution, and as a result would only work if the CRTC_W / CRTC_H were smaller than the screen resolution. It will now try until it reaches 102% of the screen's resolution. Note that this algorithm exists mostly as a band-aid for a missing functionality: it is not possible for userspace to request the closest mode that would encapsulate the provided one, because the GEM buffer is created beforehand. If there was a way to let the kernel tweak the mode, I could write a better algorithm that would result in a better looking picture. Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Acked-by:
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Dave Airlie authored
This removes the code to move resources directly between SYSTEM and VRAM in favour of using the core ttm mulithop code. Signed-off-by:
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Dave Airlie authored
This removes the code to move resources directly between SYSTEM and VRAM in favour of using the core ttm mulithop code. Signed-off-by:
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Dave Airlie authored
This removes the code to move resources directly between SYSTEM and VRAM in favour of using the core ttm mulithop code. Signed-off-by:
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