- 06 Sep, 2022 2 commits
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Rodrigo Vivi authored
Specially in GT reset case this could be triggered and try to disable things that had never been enabled. Let's add some protection here. Cc: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by:
Ashutosh Dixit <ashutosh.dixit@intel.com> Acked-by:
Nirmoy Das <nirmoy.das@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220902095126.373036-1-rodrigo.vivi@intel.com
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Matthew Auld authored
Just move the HAS_FLAT_CCS() check into needs_ccs_pages. This also then fixes i915_ttm_memcpy_allowed() which was incorrectly reporting true on DG1, even though it doesn't have small-BAR or flat-CCS. References: https://gitlab.freedesktop.org/drm/intel/-/issues/6605 Fixes: efeb3caf ("drm/i915/ttm: disallow CPU fallback mode for ccs pages") Signed-off-by:
Matthew Auld <matthew.auld@intel.com> Cc: Nirmoy Das <nirmoy.das@intel.com> Reviewed-by:
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- 05 Sep, 2022 1 commit
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Nirmoy Das authored
On system suspend when system memory is low then i915_gem_obj_copy_ttm() could fail trying to backup a lmem obj. GEM_WARN_ON() is not enough, suspend shouldn't continue if i915_ttm_backup() throws an error. v2: Keep the fdo issue till we have a igt test(Matt). v3: Use %pe(Andrzej) References: https://gitlab.freedesktop.org/drm/intel/-/issues/6529Reviewed-by:
Andrzej Hajda <andrzej.hajda@intel.com> Suggested-by:
Chris P Wilson <chris.p.wilson@intel.com> Signed-off-by:
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- 01 Sep, 2022 1 commit
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Rodrigo Vivi authored
We need to inform PCODE of a desired ring frequencies so PCODE update the memory frequencies to us. rps->min_freq and rps->max_freq are the frequencies used in that request. However they were unset when SLPC was enabled and PCODE never updated the memory freq. v2 (as Suggested by Ashutosh): if SLPC is in use, let's pick the right frequencies from the get_ia_constants instead of the fake init of rps' min and max. v3: don't forget the max <= min return v4: Move all the freq conversion to intel_rps.c. And the max <= min check to where it belongs. v5: (Ashutosh) Fix old comment s/50 HZ/50 MHz and add a doc explaining the "raw format" Fixes: 7ba79a67 ("drm/i915/guc/slpc: Gate Host RPS when SLPC is enabled") Cc: <stable@vger.kernel.org> # v5.15+ Cc: Ashutosh Dixit <ashutosh.dixit@intel.com> Tested-by:Sushma Venkatesh Reddy <sushma.venkatesh.reddy@intel.com> Signed-off-by:
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- 31 Aug, 2022 1 commit
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Rodrigo Vivi authored
Fix for intel_guc_slpc_set_min_freq() warn: inconsistent returns '&slpc->lock'. v2: Avoid with_intel_runtime_pm with the internal goto/return. (Ashutosh) Also standardize the 'ret' if this came from the efficient setup. And avoid the 'unlikely'. Fixes: 95ccf312 ("drm/i915/guc/slpc: Allow SLPC to use efficient frequency") Reported-by:kernel test robot <lkp@intel.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Cc: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
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- 30 Aug, 2022 3 commits
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Matt Roper authored
On client DG2 platforms, optimal performance is achieved with the hardware's default "age based" thread execution setting. However on ATS-M, switching this to "round robin after dependencies" provides better performance. We'll add a new "tuning" feature flag to the ATS-M device info to enable/disable this setting. Bspec: 68331 Cc: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by:
Matt Roper <matthew.d.roper@intel.com> Reviewed-by:
Matt Atwood <matthew.s.atwood@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220826212718.409948-1-matthew.d.roper@intel.com
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Matt Roper authored
This reverts commit ca692081. The intent of Wa_14015141709 was to inform us that userspace can no longer control object-level preemption as it has on past platforms (i.e., by twiddling register bit CS_CHICKEN1[0]). The description of the workaround in the spec wasn't terribly well-written, and when we requested clarification from the hardware teams we were told that on the kernel side we should also probably stop setting FF_SLICE_CS_CHICKEN1[14], which is the register bit that directs the hardware to honor the settings in per-context register CS_CHICKEN1. It turns out that this guidance about FF_SLICE_CS_CHICKEN1[14] was a mistake; even though CS_CHICKEN1[0] is non-operational and useless to userspace, there are other bits in the register that do still work and might need to be adjusted by userspace in the future (e.g., to implement other workarounds that show up). If we don't set FF_SLICE_CS_CHICKEN1[14] in i915, then those future workarounds would not take effect. This miscommunication came to light because another workaround (Wa_16013994831) has now shown up that requires userspace to adjust the value of CS_CHICKEN[10] in certain circumstances. To ensure userspace's updates to this chicken bit are handled properly by the hardware, we need to make sure that FF_SLICE_CS_CHICKEN1[14] is once again set by the kernel. Signed-off-by:
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Andrzej Hajda authored
In case of Small BAR configurations stolen local memory can be unmappable. Since the test does not touch the memory, passing I915_BO_ALLOC_GPU_ONLY flag to i915_gem_object_create_region, will prevent -ENOSPC error from _i915_gem_object_stolen_init. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6565Signed-off-by:
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- 29 Aug, 2022 1 commit
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Joonas Lahtinen authored
Remove the module parameters for configuring GuC log size. We should instead rely on tuning the defaults to be usable for reporting bugs. v2: - Use correct 1M unit Fixes: 8ad0152a ("drm/i915/guc: Make GuC log sizes runtime configurable") Signed-off-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: John Harrison <John.C.Harrison@Intel.com> Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Reviewed-by:
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- 26 Aug, 2022 1 commit
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Matt Roper authored
Although register tuning settings are generally implemented via the workaround infrastructure, it turns out that the DRAW_WATERMARK register is not properly saved/restored by hardware around power events (i.e., RC6 entry) so updates to the value cannot be applied in the usual manner. New workaround Wa_16014892111 informs us that any tuning updates to this register must instead be applied via an INDIRECT_CTX batch buffer. This will ensure that the necessary value is re-applied when a context begins running, even if an RC6 entry had wiped the register back to hardware defaults since the last context ran. Fixes: 6dc85721 ("drm/i915/dg2: Add additional tuning settings") Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6642Signed-off-by:
Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220823202449.83727-1-matthew.d.roper@intel.com
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- 25 Aug, 2022 4 commits
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Juston Li authored
pxp will not start correctly until after mei_pxp bind completes and intel_pxp_init_hw() is called. Wait for the bind to complete before proceeding with startup. This fixes a race condition during bootup where we observed a small window for pxp commands to be sent, starting pxp before mei_pxp bind completed. Changes since v2: - wait for pxp_component to bind instead of returning -EAGAIN (Daniele) Changes since v1: - check pxp_component instead of pxp_component_added (Daniele) - pxp_component needs tee_mutex (Daniele) - return -EAGAIN so caller knows to retry (Daniele) Signed-off-by:
Juston Li <justonli@chromium.org> Reviewed-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220818174205.2412730-1-justonli@chromium.org
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Matt Roper authored
Unlike the Xe_HP platforms, MTL only has a single CCS engine; the quad-based engine masking logic does not apply to this platform (or presumably any future platforms that only have 0 or 1 CCS). Signed-off-by:
Radhakrishna Sripada <radhakrishna.sripada@intel.com> Reviewed-by:
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Matt Roper authored
Previously only dgfx platforms had a 4MB MMIO range, but starting with MTL we now use the larger range for all platforms. Bspec: 63834, 63830 Signed-off-by:
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Radhakrishna Sripada authored
Bit12 of the Forcewake request register should not be cleared post gen12. Do not touch this bit while clearing during fw domain reset. v2: Tweak the comment to drop older platforms(MattR) Bspec: 52542 Signed-off-by:
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- 24 Aug, 2022 2 commits
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Vinay Belgaumkar authored
Host Turbo operates at efficient frequency when GT is not idle unless the user or workload has forced it to a higher level. Replicate the same behavior in SLPC by allowing the algorithm to use efficient frequency. We had disabled it during boot due to concerns that it might break kernel ABI for min frequency. However, this is not the case since SLPC will still abide by the (min,max) range limits. With this change, min freq will be at efficient frequency level at init instead of fused min (RPn). If user chooses to reduce min freq below the efficient freq, we will turn off usage of efficient frequency and honor the user request. When a higher value is written, it will get toggled back again. The patch also corrects the register which needs to be read for obtaining the correct efficient frequency for Gen9+. We see much better perf numbers with benchmarks like glmark2 with efficient frequency usage enabled as expected. v2: Address review comments (Rodrigo) v3: with efficient frequency being dynamic, it is possible that the req frequency may go beyond max freq. This will cause SLPC selftests to fail. Add a FIXME there to start the test with [RPn, RP0] instead and restore it afterwards. BugLink: https://gitlab.freedesktop.org/drm/intel/-/issues/5468 Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
Vinay Belgaumkar <vinay.belgaumkar@intel.com> Signed-off-by:
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Jani Nikula authored
Commit 368d179a ("drm/i915/guc: Add GuC <-> kernel time stamp translation information") added intel_device_info_print_runtime() in the time info dump for no obvious reason or explanation in the commit message. It only logs the rawclk freq. Remove it. Cc: John Harrison <John.C.Harrison@Intel.com> Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Signed-off-by:
John Harrison <John.C.Harrison@Intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/b395ac4c909042f5daabf29959d8733993545aa2.1660910433.git.jani.nikula@intel.com
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- 20 Aug, 2022 1 commit
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Matthew Auld authored
This reverts commit 6a079903. Everything in CI using GuC is now timing out[1], and killing the machine with this change (perhaps a deadlock?). CI was recently on fire due to some changes coming in from -rc1, so likely the pre-merge CI results for this series were invalid? For now just revert, unless GuC experts already have a fix in mind. [1] https://intel-gfx-ci.01.org/tree/drm-tip/index.html? Signed-off-by:
Lucas De Marchi <lucas.demarchi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220819123904.913750-1-matthew.auld@intel.com
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- 18 Aug, 2022 2 commits
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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. 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. Alan Previn: Matt Brost first introduced this series 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. Signed-off-by:
Matthew Brost <matthew.brost@intel.com> Signed-off-by:
Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by:
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Matthew Brost authored
This will help in an upcoming patch where the live selftest wrappers are extended to do more. Signed-off-by:
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- 17 Aug, 2022 11 commits
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Daniele Ceraolo Spurio authored
If the GuC CTs are full and we need to stall the request submission while waiting for space, we save the stalled request and where the stall occurred; when the CTs have space again we pick up the request submission from where we left off. If a full GT reset occurs, the state of all contexts is cleared and all non-guilty requests are unsubmitted, therefore we need to restart the stalled request submission from scratch. To make sure that we do so, clear the saved request after a reset. Fixes note: the patch that introduced the bug is in 5.15, but no officially supported platform had GuC submission enabled by default in that kernel, so the backport to that particular version (and only that one) can potentially be skipped. Fixes: 925dc1cf ("drm/i915/guc: Implement GuC submission tasklet") Signed-off-by:
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Daniele Ceraolo Spurio authored
The test needs GT reset to trigger the scrubbing logic, so we can only run it when reset is enabled. Signed-off-by:
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John Harrison authored
Some debug code got left in when the GuC based register save for error capture was added. Remove that. Signed-off-by:
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John Harrison authored
The GuC log buffer sizes had to be configured statically at compile time. This can be quite troublesome when needing to get larger logs out of a released driver. So re-organise the code to allow a boot time module parameter override. Signed-off-by:
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Chris Wilson authored
Use a temporary page and mempy_from_wc to reduce the time it takes to dump the guc log to debugfs. Signed-off-by:
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John Harrison authored
When debugging GuC communication issues, it is useful to have the CTB info available. So add the state and buffer contents to the error capture log. Also, add a sub-structure for the GuC specific error capture info as it is now becoming numerous. Signed-off-by:
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John Harrison authored
It is useful to be able to match GuC events to kernel events when looking at the GuC log. That requires being able to convert GuC timestamps to kernel time. So, when dumping error captures and/or GuC logs, include a stamp in both time zones plus the clock frequency. Signed-off-by:
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John Harrison authored
There was a size check to warn if the GuC error state capture buffer allocation would be too small to fit a reasonable amount of capture data for the current platform. Unfortunately, the test was done too early in the boot sequence and was actually testing 'if(-ENODEV > size)'. Move the check to be later. The check is only used to print a warning message, so it doesn't really matter how early or late it is done. Note that it is not possible to dynamically size the buffer because the allocation needs to be done before the engine information is available (at least, it would be in the intended two-phase GuC init process). Now that the check works, it is reporting size too small for newer platforms. The check includes a 3x oversample multiplier to allow for multiple error captures to be bufferd by GuC before i915 has a chance to read them out. This is less important than simply being big enough to fit the first capture. So a) bump the default size to be large enough for one capture minimum and b) make the warning only if one capture won't fit, instead use a notice for the 3x size. Note that the size estimate is a worst case scenario. Actual captures will likely be smaller. Lastly, use drm_warn istead of DRM_WARN as the former provides more infmration and the latter is deprecated. Signed-off-by:
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Alan Previn authored
Add a helper to get GuC log buffer size. Signed-off-by:
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Matt Roper authored
Some additional MMIO tuning settings have appeared in the bspec's performance tuning guide section. One of the tuning settings here is also documented as formal workaround Wa_22012654132 for some steppings of DG2. However the tuning setting applies to all DG2 variants and steppings, making it a superset of the workaround. v2: - Move DRAW_WATERMARK to engine workaround section. It only moves into the engine context on future platforms. (Lucas) - CHICKEN_RASTER_2 needs to be handled as a masked register. (Lucas) Bspec: 68331 Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by:
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Matt Roper authored
The bspec performance tuning section gives recommended settings that the driver should program for various MMIO registers. Although these settings aren't "workarounds" we use the workaround infrastructure to do this programming to make sure it is handled at the appropriate places and doesn't conflict with any real workarounds. Since more of these are starting to show up on recent platforms, it's a good time to create a dedicated function to hold them so that there's less ambiguity about how/where to implement new ones. Cc: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by:
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- 09 Aug, 2022 2 commits
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Matthew Auld authored
Crucible + recent Mesa seems to sometimes hit: GEM_BUG_ON(num_ccs_blks > NUM_CCS_BLKS_PER_XFER) And it looks like we can also trigger this with gem_lmem_swapping, if we modify the test to use slightly larger object sizes. Looking closer it looks like we have the following issues in migrate_copy(): - We are using plain integer in various places, which we can easily overflow with a large object. - We pass the entire object size (when the src is lmem) into emit_pte() and then try to copy it, which doesn't work, since we only have a few fixed sized windows in which to map the pages and perform the copy. With an object > 8M we therefore aren't properly copying the pages. And then with an object > 64M we trigger the GEM_BUG_ON(num_ccs_blks > NUM_CCS_BLKS_PER_XFER). So it looks like our copy handling for any object > 8M (which is our CHUNK_SZ) is currently broken on DG2. Fixes: da0595ae ("drm/i915/migrate: Evict and restore the flatccs capable lmem obj") Testcase: igt@gem_lmem_swapping Signed-off-by: -
Matthew Auld authored
We only ever need to emit one ccs block copy command. Signed-off-by:
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- 08 Aug, 2022 1 commit
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Mauro Carvalho Chehab authored
WRITE_ONCE() should happen at the original var, not on a local copy of it. Cc: stable@vger.kernel.org Fixes: 5d36acb7 ("drm/i915/gt: Batch TLB invalidations") Signed-off-by:
Mauro Carvalho Chehab <mchehab@kernel.org> Reviewed-by:
Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by:
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- 03 Aug, 2022 1 commit
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Chris Wilson authored
The obj->base.resv may be shared across many objects, some of which may still be live and locked, preventing objects from being freed indefintely. We could individualise the lock during the free, or rely on a freed object having no contention and being able to immediately free the pages it owns. References: https://gitlab.freedesktop.org/drm/intel/-/issues/6469 Fixes: be7612fd ("drm/i915: Require object lock when freeing pages during destruction") Fixes: 6cb12fbd ("drm/i915: Use trylock instead of blocking lock for __i915_gem_free_objects.") Cc: <stable@vger.kernel.org> # v5.17+ Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Tested-by:
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- 02 Aug, 2022 2 commits
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Harish Chegondi authored
Bspec: 46052 Reviewed-by:
Harish Chegondi <harish.chegondi@intel.com> Signed-off-by:
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John Harrison authored
New release of GuC with a bunch of fixes specific to DG2. Some of these require follow up i915 changes to enable. Note also that it is not necessary to maintain backwards compatibility with 70.1.2 for DG2 because DG2 is still under force probe protection. Signed-off-by:
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- 01 Aug, 2022 1 commit
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Daniele Ceraolo Spurio authored
The GuC FW applies the parent context policy to all the children, so individual updates to the children are not supported and we should not send them. Note that sending the message did not have any functional consequences, because the GuC just drops it and logs an error; since we were trying to set the child policy to match the parent anyway the message being dropped was not a problem. Signed-off-by:
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- 29 Jul, 2022 3 commits
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John Harrison authored
When the KMD sends a CLIENT_RESET request to GuC (as part of the suspend sequence), GuC will mark the CTB buffer as 'UNUSED'. If the KMD then checked the CTB queue, it would see a non-zero status value and report the buffer as corrupted. Technically, no G2H messages should be received once the CLIENT_RESET has been sent. However, if a context was outstanding on an engine then it would get reset and a reset notification would be sent. So, don't actually treat UNUSED as a catastrophic error. Just flag it up as unexpected and keep going. Signed-off-by:
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Matthew Brost authored
The GuC needs a copy of a golden context for implementing watchdog resets (aka media resets). This context is larger on newer platforms. So adjust the size being allocated/copied accordingly. Signed-off-by:
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John Harrison authored
It is no longer guaranteed that there will always be an RCS engine. So, use the helper function for finding the first available engine that can be used for general purpose selftets. Signed-off-by:
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