- 31 Oct, 2022 2 commits
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Anshuman Gupta authored
We had already grabbed the rpm wakeref at obj destruction path, but it also required to grab the wakeref when object moves. When i915_gem_object_release_mmap_offset() gets called by i915_ttm_move_notify(), it will release the mmap offset without grabbing the wakeref. We want to avoid that therefore, grab the wakeref at i915_ttm_unmap_virtual() accordingly. While doing that also changed the lmem_userfault_lock from mutex to spinlock, as spinlock widely used for list. Also changed if (obj->userfault_count) to GEM_BUG_ON(!obj->userfault_count). v2: - Removed lmem_userfault_{list,lock} from intel_gt. [Matt Auld] Fixes: ad74457a ("drm/i915/dgfx: Release mmap on rpm suspend") Suggested-by:Matthew Auld <matthew.auld@intel.com> Signed-off-by:
Anshuman Gupta <anshuman.gupta@intel.com> Reviewed-by:
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Anshuman Gupta authored
Runtime pm is not really per GT, therefore it make sense to move lmem_userfault_list, lmem_userfault_lock and userfault_wakeref from intel_gt to intel_runtime_pm structure, which is embedded to i915. No functional change. v2: - Fixes the code comment nit. [Matt Auld] Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221027092242.1476080-2-anshuman.gupta@intel.com
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- 29 Oct, 2022 1 commit
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Matt Roper authored
The termination entries were missing for a couple of the recently-added MTL steering tables. Fixes: f32898c9 ("drm/i915/xelpg: Add multicast steering") Fixes: a7ec65fc ("drm/i915/xelpmp: Add multicast steering for media GT") Signed-off-by:
Matt Roper <matthew.d.roper@intel.com> Reviewed-by:
Lucas De Marchi <lucas.demarchi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221028224022.964997-1-matthew.d.roper@intel.com
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- 27 Oct, 2022 22 commits
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Umesh Nerlige Ramappa authored
OA was disabled for DG2 as support was missing. Enable it back now. Signed-off-by:
Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Reviewed-by:
Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
John Harrison <John.C.Harrison@Intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221026222102.5526-17-umesh.nerlige.ramappa@intel.com
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Lionel Landwerlin authored
We have an additional register to select which slices contribute to OAG/OAG counter increments. Signed-off-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by:
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Vinay Belgaumkar authored
On DG2, a w/a resets RCS/CCS before it goes into RC6. This breaks OA since OA does not expect engine resets during its use. Fix it by disabling RC6. v2: (Ashutosh) - Bring back slpc_unset_param helper - Update commit msg - Use with_intel_runtime_pm helper for set/unset v3: (Ashutosh) - Just use intel_uc_uses_guc_rc Signed-off-by:
Vinay Belgaumkar <vinay.belgaumkar@intel.com> Signed-off-by:
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Umesh Nerlige Ramappa authored
If a drm client is killed, then hw contexts used by the client are reset immediately. This reset clears the EU flex counter configuration. If an OA use case is running in parallel, it would start seeing zeroed eu counter values following the reset even if the drm client is restarted. Save/restore the EU flex counter config so that the EU counters can be monitored continuously across resets. v2: - Save/restore eu flex config only for gen12, as for pre-gen12, these are saved and restored in the context image. Signed-off-by:
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Umesh Nerlige Ramappa authored
OA reports in the OA buffer contain an OA timestamp field that helps user calculate delta between 2 OA reports. The calculation relies on the CS timestamp frequency to convert the timestamp value to nanoseconds. The CS timestamp frequency is a function of the CTC_SHIFT value in RPM_CONFIG0. In DG2, OA unit assumes that the CTC_SHIFT is 3, instead of using the actual value from RPM_CONFIG0. At the user level, this results in an error in calculating delta between 2 OA reports since the OA timestamp is not shifted in the same manner as CS timestamp. Also the periodicity of the reports is different from what the user configured because of mismatch in the CS and OA frequencies. The issue also affects MI_REPORT_PERF_COUNT command. To resolve this, return actual OA timestamp frequency to the user in i915_getparam_ioctl, so that user can calculate the right OA exponent as well as interpret the reports correctly. MR: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18893 v2: - Use REG_FIELD_GET (Ashutosh) - Update commit msg Signed-off-by:
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Umesh Nerlige Ramappa authored
Disable Clock gating in EU when gathering the events so that EU events are not lost. v2: Fix checkpatch issues v3: User MCR helpers to write to MC reg v4: Indent correctly (checkpatch) Signed-off-by:
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Umesh Nerlige Ramappa authored
DG2 introduces OA reports with 64 bit report header fields. Perf OA would need more information about the OA format in order to process such reports. Store all OA format info in oa_buffer instead of just the size and format-id. v2: Drop format_size variable (Ashutosh) Signed-off-by:
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Umesh Nerlige Ramappa authored
User passes uabi engine class and instance to the perf OA interface. Use gt corresponding to the engine to pin the buffers to the right ggtt. Signed-off-by:
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Umesh Nerlige Ramappa authored
With multi-gt, user can access multiple OA buffers concurrently. Use stream->lock instead of gt->perf.lock to serialize file operations. Signed-off-by:
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Umesh Nerlige Ramappa authored
Make perf part of gt as the OAG buffer is specific to a gt. The refactor eventually simplifies programming the right OA buffer and the right HW registers when supporting multiple gts. Signed-off-by:
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Umesh Nerlige Ramappa authored
Earlier code used exclusive_stream to check for user passed context. Simplify this by accessing stream->ctx. Signed-off-by:
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Umesh Nerlige Ramappa authored
XEHPSDV and DG2 provide a way to configure bytes per clock vs commands per clock reporting. Enable bytes per clock setting on enabling OA. Bspec: 51762 Bspec: 52201 v2: - Fix commit msg (Ashutosh) - Fix checkpatch issues v3: - s/commands/bytes/ in code comment and commmit msg Signed-off-by:
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Umesh Nerlige Ramappa authored
Some SKUs of same gen12 platform may have different oactxctrl offsets. For gen12, determine oactxctrl offsets at runtime. v2: (Lionel) - Move MI definitions to intel_gpu_commands.h - Ensure __find_reg_in_lri does read past context image size v3: (Ashutosh) - Drop unnecessary use of double underscores - fix find_reg_in_lri - Return error if oa context offset is U32_MAX - Error out if oa_ctx_ctrl_offset does not find offset v4: (Ashutosh) - Warn on odd MI LRI_LEN - Remove unnecessary check for valid_oactxctrl_offset - Drop valid_oactxctrl_offset macro v5: Drop unrelated comment Signed-off-by:
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Umesh Nerlige Ramappa authored
Predication for batch buffer commands changed in XEHPSDV. MI_BATCH_BUFFER_START predicates based on MI_SET_PREDICATE_RESULT register. The MI_SET_PREDICATE_RESULT register can only be modified with MI_SET_PREDICATE command. When configured, the MI_SET_PREDICATE command sets MI_SET_PREDICATE_RESULT based on bit 0 of MI_PREDICATE_RESULT_2. Use this to configure predication in noa_wait. Signed-off-by:
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Umesh Nerlige Ramappa authored
Add new OA formats for DG2. MR: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18893 v2: - Update commit title (Ashutosh) - Coding style fixes (Lionel) - 64 bit OA formats need UMD changes in GPUvis, drop for now and send in a separate series with UMD changes v3: - Update commit message to drop 64 bit related description Signed-off-by:
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Umesh Nerlige Ramappa authored
With GuC mode of submission, GuC is in control of defining the context id field that is part of the OA reports. To filter reports, UMD and KMD must know what sw context id was chosen by GuC. There is not interface between KMD and GuC to determine this, so read the upper-dword of EXECLIST_STATUS to filter/squash OA reports for the specific context. v2: Explain guc id stealing w.r.t OA use case Signed-off-by:
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Nathan Chancellor authored
When booting with CONFIG_CFI_CLANG, there are numerous violations when accessing the files under /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt/gt0: $ cd /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt/gt0 $ grep . * id:0 punit_req_freq_mhz:350 rc6_enable:1 rc6_residency_ms:214934 rps_act_freq_mhz:1300 rps_boost_freq_mhz:1300 rps_cur_freq_mhz:350 rps_max_freq_mhz:1300 rps_min_freq_mhz:350 rps_RP0_freq_mhz:1300 rps_RP1_freq_mhz:350 rps_RPn_freq_mhz:350 throttle_reason_pl1:0 throttle_reason_pl2:0 throttle_reason_pl4:0 throttle_reason_prochot:0 throttle_reason_ratl:0 throttle_reason_status:0 throttle_reason_thermal:0 throttle_reason_vr_tdc:0 throttle_reason_vr_thermalert:0 $ sudo dmesg &| grep "CFI failure at" [ 214.595903] CFI failure at kobj_attr_show+0x19/0x30 (target: id_show+0x0/0x70 [i915]; expected type: 0xc527b809) [ 214.596064] CFI failure at kobj_attr_show+0x19/0x30 (target: punit_req_freq_mhz_show+0x0/0x40 [i915]; expected type: 0xc527b809) [ 214.596407] CFI failure at kobj_attr_show+0x19/0x30 (target: rc6_enable_show+0x0/0x40 [i915]; expected type: 0xc527b809) [ 214.596528] CFI failure at kobj_attr_show+0x19/0x30 (target: rc6_residency_ms_show+0x0/0x270 [i915]; expected type: 0xc527b809) [ 214.596682] CFI failure at kobj_attr_show+0x19/0x30 (target: act_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.596792] CFI failure at kobj_attr_show+0x19/0x30 (target: boost_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.596893] CFI failure at kobj_attr_show+0x19/0x30 (target: cur_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.596996] CFI failure at kobj_attr_show+0x19/0x30 (target: max_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.597099] CFI failure at kobj_attr_show+0x19/0x30 (target: min_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.597198] CFI failure at kobj_attr_show+0x19/0x30 (target: RP0_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.597301] CFI failure at kobj_attr_show+0x19/0x30 (target: RP1_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.597405] CFI failure at kobj_attr_show+0x19/0x30 (target: RPn_freq_mhz_show+0x0/0xe0 [i915]; expected type: 0xc527b809) [ 214.597538] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.597701] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.597836] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.597952] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.598071] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.598177] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.598307] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.598439] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) [ 214.598542] CFI failure at kobj_attr_show+0x19/0x30 (target: throttle_reason_bool_show+0x0/0x50 [i915]; expected type: 0xc527b809) With kCFI, indirect calls are validated against their expected type versus actual type and failures occur when the two types do not match. The ultimate issue is that these sysfs functions are expecting to be called via dev_attr_show() but they may also be called via kobj_attr_show(), as certain files are created under two different kobjects that have two different sysfs_ops in intel_gt_sysfs_register(), hence the warnings above. When accessing the gt_ files under /sys/devices/pci0000:00/0000:00:02.0/drm/card0, which are using the same sysfs functions, there are no violations, meaning the functions are being called with the proper type. To make everything work properly, adjust certain functions to match the type of the ->show() and ->store() members in 'struct kobj_attribute'. Add a macro to generate functions for that can be called via both dev_attr_{show,store}() or kobj_attr_{show,store}() so that they can be called through both kobject locations without violating kCFI and adjust the attribute groups to account for this. Link: https://github.com/ClangBuiltLinux/linux/issues/1716Reviewed-by:Andi Shyti <andi.shyti@linux.intel.com> Reviewed-by:
Andrzej Hajda <andrzej.hajda@intel.com> Reviewed-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
Nathan Chancellor <nathan@kernel.org> Signed-off-by:
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Karolina Drobnik authored
We know that as long as GEM context create ioctl succeeds, a context was created. There is no need to write about it, especially when such a message heavily pollutes dmesg and makes debugging actual errors harder. Since commit baa89ba3 ("drm/i915/gem: initial conversion to new logging macros using coccinelle"), the logging for creating a new user context was moved under the driver debug output (for lack of a means for per-user logs, and a lack of user-focused drm.debug parameter). This only reveals how obnoxious having that spam be part of the driver debug logs, so remove it. [ from Chris Wilson ] Suggested-by:
Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Karolina Drobnik <karolina.drobnik@intel.com> Cc: Andi Shyti <andi.shyti@linux.intel.com> Reviewed-by:
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Robert Beckett authored
swiotlb_max_segment used to return either the maximum size that swiotlb could bounce, or for Xen PV PAGE_SIZE even if swiotlb could bounce buffer larger mappings. This made i915 on Xen PV work as it bypasses the coherency aspect of the DMA API and can't cope with bounce buffering and this avoided bounce buffering for the Xen/PV case. So instead of adding this hack back, check for Xen/PV directly in i915 for the Xen case and otherwise use the proper DMA API helper to query the maximum mapping size. Replace swiotlb_max_segment() calls with dma_max_mapping_size(). In i915_gem_object_get_pages_internal() no longer consider max_segment only if CONFIG_SWIOTLB is enabled. There can be other (iommu related) causes of specific max segment sizes. Fixes: a2daa27c ("swiotlb: simplify swiotlb_max_segment") Reported-by:
Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by:
Robert Beckett <bob.beckett@collabora.com> Signed-off-by:
Christoph Hellwig <hch@lst.de> [hch: added the Xen hack, rewrote the changelog] Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by:
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Matthew Auld authored
The process for merging uAPI is to have UMD side ready and reviewed and merged before merging. Revert for now until that is ready. This reverts commit d54576a0. Reported-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by:
Nirmoy Das <nirmoy.das@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221024101946.28974-1-matthew.auld@intel.com
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Alan Previn authored
With the introduction of the delayed disable-sched behavior, we use the GuC's xarray of valid guc-id's as a way to identify if new requests had been added to a context when the said context is being checked for closure. Additionally that prior change also closes the race for when a new incoming request fails to cancel the pending delayed disable-sched worker. With these two complementary checks, we see no more use for intel_context:guc_state:number_committed_requests. Signed-off-by:
Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by:
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Matthew Brost authored
Add a delay, configurable via debugfs (default 34ms), to disable scheduling of a context after the pin count goes to zero. Disable scheduling is a costly operation as it requires synchronizing with the GuC. So the idea is that a delay allows the user to resubmit something before doing this operation. This delay is only done if the context isn't closed and less than a given threshold (default is 3/4) of the guc_ids are in use. Alan Previn: Matt Brost first introduced this patch back in Oct 2021. However no real world workload with measured performance impact was available to prove the intended results. Today, this series is being republished in response to a real world workload that benefited greatly from it along with measured performance improvement. Workload description: 36 containers were created on a DG2 device where each container was performing a combination of 720p 3d game rendering and 30fps video encoding. The workload density was configured in a way that guaranteed each container to ALWAYS be able to render and encode no less than 30fps with a predefined maximum render + encode latency time. That means the totality of all 36 containers and their workloads were not saturating the engines to their max (in order to maintain just enough headrooom to meet the min fps and max latencies of incoming container submissions). Problem statement: It was observed that the CPU core processing the i915 soft IRQ work was experiencing severe load. Using tracelogs and an instrumentation patch to count specific i915 IRQ events, it was confirmed that the majority of the CPU cycles were caused by the gen11_other_irq_handler() -> guc_irq_handler() code path. The vast majority of the cycles was determined to be processing a specific G2H IRQ: i.e. INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_DONE. These IRQs are sent by GuC in response to i915 KMD sending H2G requests: INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET. Those H2G requests are sent whenever a context goes idle so that we can unpin the context from GuC. The high CPU utilization % symptom was limiting density scaling. Root Cause Analysis: Because the incoming execution buffers were spread across 36 different containers (each with multiple contexts) but the system in totality was NOT saturated to the max, it was assumed that each context was constantly idling between submissions. This was causing a thrashing of unpinning contexts from GuC at one moment, followed quickly by repinning them due to incoming workload the very next moment. These event-pairs were being triggered across multiple contexts per container, across all containers at the rate of > 30 times per sec per context. Metrics: When running this workload without this patch, we measured an average of ~69K INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_DONE events every 10 seconds or ~10 million times over ~25+ mins. With this patch, the count reduced to ~480 every 10 seconds or about ~28K over ~10 mins. The improvement observed is ~99% for the average counts per 10 seconds. Design awareness: Selftest impact. As temporary WA disable this feature for the selftests. Selftests are very timing sensitive and any change in timing can cause failure. A follow up patch will fixup the selftests to understand this delay. Design awareness: Race between guc_request_alloc and guc_context_close. If a context close is issued while there is a request submission in flight and a delayed schedule disable is pending, guc_context_close and guc_request_alloc will race to cancel the delayed disable. To close the race, make sure that guc_request_alloc waits for guc_context_close to finish running before checking any state. Design awareness: GT Reset event. If a gt reset is triggered, as preparation steps, add an additional step to ensure all contexts that have a pending delay-disable-schedule task be flushed of it. Move them directly into the closed state after cancelling the worker. This is okay because the existing flow flushes all yet-to-arrive G2H's dropping them anyway. Signed-off-by:
Matthew Brost <matthew.brost@intel.com> Signed-off-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by:
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- 26 Oct, 2022 4 commits
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Alan Previn authored
During GuC error capture initialization, we estimate the amount of size we need for the error-capture-region of the shared GuC-log-buffer. This calculation was incorrect so fix that. With the fixed calculation we can reduce the allocation of error-capture region from 4MB to 1MB (see note2 below for reasoning). Additionally, switch from drm_notice to drm_debug for the 3X spare size check since that would be impossible to hit without redesigning gpu_coredump framework to hold multiple captures. NOTE1: Even for 1x the min size estimation case, actually running out of space is a corner case because it can only occur if all engine instances get reset all at once and i915 isn't able extract the capture data fast enough within G2H handler worker. NOTE2: With the corrected calculation, a DG2 part required ~77K and a PVC required ~115K (1X min-est-size that is calculated as one-shot all-engine- reset scenario). Fixes: d7c15d76 ("drm/i915/guc: Check sizing of guc_capture output") Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: John Harrison <John.C.Harrison@Intel.com> Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris.p.wilson@intel.com> Signed-off-by:
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Vinay Belgaumkar authored
GuC will set the min/max frequencies to theoretical max on ATS-M. This will break kernel ABI, so limit min/max frequency to RP0(platform max) instead. Also modify the SLPC selftest to update the min frequency when we have a server part so that we can iterate between platform min and max. v2: Check softlimits instead of platform limits (Riana) v3: More review comments (Ashutosh) v4: No need to use saved_min_freq and other comments (Ashutosh) Bug: https://gitlab.freedesktop.org/drm/intel/-/issues/7030Acked-by:
Riana Tauro <riana.tauro@intel.com> Signed-off-by:
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Vinay Belgaumkar authored
Waitboost (when SLPC is enabled) results in a H2G message. This can result in thousands of messages during a stress test and fill up an already full CTB. There is no need to request for boost if min softlimit is equal or greater than it. v2: Add the tracing back, and check requested freq in the worker thread (Tvrtko) v3: Check requested freq in dec_waiters as well v4: Only check min_softlimit against boost_freq. Limit this optimization for server parts for now. v5: min_softlimit can be greater than boost (Ashutosh) Reviewed-by:
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Gustavo Sousa authored
Workaround to be applied to platforms using XE_LP graphics. BSpec: 52890 Signed-off-by:
Gustavo Sousa <gustavo.sousa@intel.com> Reviewed-by:
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- 24 Oct, 2022 8 commits
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Alan Previn authored
We missed this at initial upstream because at that time none of the GuC enabled platforms had a compute engine. Add this now. Signed-off-by:
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Alan Previn authored
If GuC is being used and we initialized GuC-error-capture, we need to be warning if we don't provide an error-capture register list in the firmware ADS, for valid GT engines. A warning makes sense as this would impact debugability without realizing why a reglist wasn't retrieved and reported by GuC. However, depending on the platform, we might have certain engines that have a register list for engine instance error state but not for engine class. Thus, add a check only to warn if the register list was non existent vs an empty list (use the empty lists to skip the warning). NOTE: if a future platform were to introduce new registers in place of what was an empty list on existing / legacy hardware engines no warning is provided as the empty list is meant to be used intentionally. As an example, if a future hardware were to add blitter engine-class-registers (new) on top of the legacy blitter engine-instance-register (HEAD, TAIL, etc.), no warning is generated. Signed-off-by:
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John Harrison authored
A workaround was added to the driver to allow compute workloads to run 'forever' by disabling pre-emption on the RCS engine for Gen12. It is not totally unbound as the heartbeat will kick in eventually and cause a reset of the hung engine. However, this does not work well in GuC submission mode. In GuC mode, the pre-emption timeout is how GuC detects hung contexts and triggers a per engine reset. Thus, disabling the timeout means also losing all per engine reset ability. A full GT reset will still occur when the heartbeat finally expires, but that is a much more destructive and undesirable mechanism. The purpose of the workaround is actually to give compute tasks longer to reach a pre-emption point after a pre-emption request has been issued. This is necessary because Gen12 does not support mid-thread pre-emption and compute tasks can have long running threads. So, rather than disabling the timeout completely, just set it to a 'long' value. v2: Review feedback from Tvrtko - must hard code the 'long' value instead of determining it algorithmically. So make it an extra CONFIG definition. Also, remove the execlist centric comment from the existing pre-emption timeout CONFIG option given that it applies to more than just execlists. Signed-off-by:
Michal Mrozek <michal.mrozek@intel.com> Acked-by:
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John Harrison authored
Compute workloads are inherently not pre-emptible for long periods on current hardware. As a workaround for this, the pre-emption timeout for compute capable engines was disabled. This is undesirable with GuC submission as it prevents per engine reset of hung contexts. Hence the next patch will re-enable the timeout but bumped up by an order of magnitude. However, the heartbeat might not respect that. Depending upon current activity, a pre-emption to the heartbeat pulse might not even be attempted until the last heartbeat period. Which means that only one period is granted for the pre-emption to occur. With the aforesaid bump, the pre-emption timeout could be significantly larger than this heartbeat period. So adjust the heartbeat code to take the pre-emption timeout into account. When it reaches the final (high priority) period, it now ensures the delay before hitting reset is bigger than the pre-emption timeout. v2: Fix for selftests which adjust the heartbeat period manually. v3: Add FIXME comment about selftests. Add extra FIXME comment and drm_notices when setting heartbeat to a non-default value (review feedback from Tvrtko) Signed-off-by:
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John Harrison authored
An earlier patch added support for compute engines. However, it missed enabling the anti-pre-emption w/a for the new engine class. So move the 'compute capable' flag earlier and use it for the pre-emption w/a test. Fixes: c674c5b9 ("drm/i915/xehp: CCS should use RCS setup functions") Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Aravind Iddamsetty <aravind.iddamsetty@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: John Harrison <John.C.Harrison@Intel.com> Cc: Jason Ekstrand <jason@jlekstrand.net> Cc: "Michał Winiarski" <michal.winiarski@intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com> Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com> Cc: Stuart Summers <stuart.summers@intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Ramalingam C <ramalingam.c@intel.com> Cc: Akeem G Abodunrin <akeem.g.abodunrin@intel.com> Signed-off-by:
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John Harrison authored
GuC converts the pre-emption timeout and timeslice quantum values into clock ticks internally. That significantly reduces the point of 32bit overflow. On current platforms, worst case scenario is approximately 110 seconds. Rather than allowing the user to set higher values and then get confused by early timeouts, add limits when setting these values. v2: Add helper functions for clamping (review feedback from Tvrtko). v3: Add a bunch of BUG_ON range checks in addition to the checks already in the clamping functions (Tvrtko) Signed-off-by:
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Andrzej Hajda authored
This patch replaces all occurences of the form intel_uncore_write(reg, intel_uncore_read(reg) OP val) with intel_uncore_rmw. Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Andrzej Hajda authored
This patch replaces all occurences of the form intel_uncore_write(reg, intel_uncore_read(reg) OP val) with intel_uncore_rmw. Signed-off-by:
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- 21 Oct, 2022 1 commit
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Matt Roper authored
A misplaced closing parenthesis caused the groupid/instanceid values to be considered part of the ternary operator's condition instead of being OR'd into the resulting value. Fixes: f32898c9 ("drm/i915/xelpg: Add multicast steering") Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Arun R Murthy <arun.r.murthy@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221019222437.3035182-1-matthew.d.roper@intel.com
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- 20 Oct, 2022 2 commits
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Tvrtko Ursulin authored
Since a7c01fa9 ("signal: break out of wait loops on kthread_stop()") kthread_stop() started asserting a pending signal which wreaks havoc with a few of our selftests. Mainly because they are not fully expecting to handle signals, but also cutting the intended test runtimes short due signal_pending() now returning true (via __igt_timeout), which therefore breaks both the patterns of: kthread_run() ..sleep for igt_timeout_ms to allow test to exercise stuff.. kthread_stop() And check for errors recorded in the thread. And also: Main thread | Test thread ---------------+------------------------------ kthread_run() | kthread_stop() | do stuff until __igt_timeout | -- exits early due signal -- Where this kthread_stop() was assume would have a "join" semantics, which it would have had if not the new signal assertion issue. To recap, threads are now likely to catch a previously impossible ERESTARTSYS or EINTR, marking the test as failed, or have a pointlessly short run time. To work around this start using kthread_work(er) API which provides an explicit way of waiting for threads to exit. And for cases where parent controls the test duration we add explicit signaling which threads will now use instead of relying on kthread_should_stop(). Signed-off-by:
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Ville Syrjälä authored
The fact that LMEMBAR is BAR2 should be of no real interest to anyone. So use the name of the BAR rather than its index. Signed-off-by:
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