- 08 Mar, 2018 12 commits
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Maarten Lankhorst authored
This will get rid of the following error: [ 74.730271] WARNING: CPU: 4 PID: 0 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0 [ 74.730311] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel crct10dif_pclmul snd_hda_codec crc32_pclmul snd_hwdep broadcom ghash_clmulni_intel snd_hda_core bcm_phy_lib snd_pcm tg3 lpc_ich mei_me mei prime_numbers [ 74.730353] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G U 4.16.0-rc2-CI-CI_DRM_3822+ #1 [ 74.730355] Hardware name: Dell Inc. XPS 8300 /0Y2MRG, BIOS A06 10/17/2011 [ 74.730359] RIP: 0010:drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0 [ 74.730361] RSP: 0018:ffff88022fb03d10 EFLAGS: 00010086 [ 74.730365] RAX: ffffffffa0291d20 RBX: ffff88021a180000 RCX: 0000000000000001 [ 74.730367] RDX: ffffffff820e7db8 RSI: 0000000000000001 RDI: ffffffff82068cea [ 74.730369] RBP: ffff88022fb03d70 R08: 0000000000000000 R09: ffffffff815d26d0 [ 74.730371] R10: 0000000000000000 R11: ffffffffa0161ca0 R12: 0000000000000001 [ 74.730373] R13: ffff880212448008 R14: ffff880212448330 R15: 0000000000000000 [ 74.730376] FS: 0000000000000000(0000) GS:ffff88022fb00000(0000) knlGS:0000000000000000 [ 74.730378] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.730380] CR2: 000055edcbec9000 CR3: 0000000002210001 CR4: 00000000000606e0 [ 74.730382] Call Trace: [ 74.730385] <IRQ> [ 74.730397] drm_get_last_vbltimestamp+0x36/0x50 [ 74.730401] drm_update_vblank_count+0x64/0x240 [ 74.730409] drm_crtc_accurate_vblank_count+0x41/0x90 [ 74.730453] display_pipe_crc_irq_handler+0x176/0x220 [i915] [ 74.730497] i9xx_pipe_crc_irq_handler+0xfe/0x150 [i915] [ 74.730537] ironlake_irq_handler+0x618/0xa30 [i915] [ 74.730548] __handle_irq_event_percpu+0x3c/0x340 [ 74.730556] handle_irq_event_percpu+0x1b/0x50 [ 74.730561] handle_irq_event+0x2f/0x50 [ 74.730566] handle_edge_irq+0xe4/0x1b0 [ 74.730572] handle_irq+0x11/0x20 [ 74.730576] do_IRQ+0x5e/0x120 [ 74.730584] common_interrupt+0x84/0x84 [ 74.730586] </IRQ> [ 74.730591] RIP: 0010:cpuidle_enter_state+0xaa/0x350 [ 74.730593] RSP: 0018:ffffc9000008beb8 EFLAGS: 00000212 ORIG_RAX: ffffffffffffffde [ 74.730597] RAX: ffff880226b80040 RBX: 000000000031fc3e RCX: 0000000000000001 [ 74.730599] RDX: 0000000000000000 RSI: ffffffff8210fb59 RDI: ffffffff820c02e7 [ 74.730601] RBP: 0000000000000004 R08: 00000000000040af R09: 0000000000000018 [ 74.730603] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 74.730606] R13: ffffe8ffffd00430 R14: 0000001166120bf4 R15: ffffffff82294460 [ 74.730621] ? cpuidle_enter_state+0xa6/0x350 [ 74.730629] do_idle+0x188/0x1d0 [ 74.730636] cpu_startup_entry+0x14/0x20 [ 74.730641] start_secondary+0x129/0x160 [ 74.730646] secondary_startup_64+0xa5/0xb0 [ 74.730660] Code: e1 48 c7 c2 b8 7d 0e 82 be 01 00 00 00 48 c7 c7 ea 8c 06 82 e8 64 ec ff ff 48 8b 83 c8 07 00 00 48 83 78 28 00 0f 84 e2 fe ff ff <0f> 0b 45 31 ed e9 db fe ff ff 41 b8 d3 4d 62 10 89 c8 6a 03 41 [ 74.730754] ---[ end trace 14b1345705b68565 ]--- Changes since v1: - Don't try to apply CRC workaround when enabling pipe, it should already be enabled. Changes since v2: - Make crc functions for !DEBUGFS case inline. - Pass intel_crtc to crc functions. - Add comments to callsites. Changes since v3: - Cache selected source to pipe_crc->source. - Set pipe_crc->skipped to MIN_INT during disable to close a race condition. Changes since v4: - Handle fallout from setting pipe_crc->source in irq handler. Cc: Marta Löfstedt <marta.lofstedt@intel.com> Reported-by:
Marta Löfstedt <marta.lofstedt@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105185Signed-off-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180308120202.52446-1-maarten.lankhorst@linux.intel.comReviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com>
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Chris Wilson authored
Currently, we only allow ourselves to prune the fences so long as all the waits completed (i.e. all the fences we checked were signaled), and that the reservation snapshot did not change across the wait. However, if we only waited for a subset of the reservation object, i.e. just waiting for the last writer to complete as opposed to all readers as well, then we would erroneously conclude we could prune the fences as indeed although all of our waits were successful, they did not represent the totality of the reservation object. v2: We only need to check the shared fences due to construction (i.e. all of the shared fences will be later than the exclusive fence, if any). Fixes: e54ca977 ("drm/i915: Remove completed fences after a wait") Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by:
Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180307171303.29466-1-chris@chris-wilson.co.uk
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Joonas Lahtinen authored
Signed-off-by:Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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https://github.com/intel/gvt-linuxJoonas Lahtinen authored
gvt-next-2018-03-08 - big refactor for shadow ppgtt (Changbin) - KBL context save/restore via LRI cmd (Weinan) - misc smatch fixes (Zhenyu) - Properly unmap dma for guest page (Changbin) - other misc fixes (Xiong, etc.) Signed-off-by:
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Weinan Li authored
There is one corner case missing schedule out notification of the preempted request. The preempted request is just completed when preemption happen, then it will be canceled and won't be resubmitted later, GVT-g will lost the schedule out notification. Here add schedule out notification if found the preempted request has been completed. v2: - refine description, add completed check and notification in execlists_cancel_port_requests. (Chris) v3: - use ternary confitional, remove local variable. (Tvrtko) Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Weinan Li <weinan.z.li@intel.com> Signed-off-by:
Zhenyu Wang <zhenyuw@linux.intel.com> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by:
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Lionel Landwerlin authored
With the introduction of asymmetric slices in CNL, we cannot rely on the previous SUBSLICE_MASK getparam to tell userspace what subslices are available. Here we introduce a more detailed way of querying the Gen's GPU topology that doesn't aggregate numbers. This is essential for monitoring parts of the GPU with the OA unit, because counters need to be normalized to the number of EUs/subslices/slices. The current aggregated numbers like EU_TOTAL do not gives us sufficient information. The Mesa series making use of this API is : https://patchwork.freedesktop.org/series/38795/ As a bonus we can draw representations of the GPU : https://imgur.com/a/vuqpa v2: Rename uapi struct s/_mask/_info/ (Tvrtko) Report max_slice/subslice/eus_per_subslice rather than strides (Tvrtko) Add uapi macros to read data from *_info structs (Tvrtko) v3: Use !!(v & DRM_I915_BIT()) for uapi macros instead of custom shifts (Tvrtko) v4: factorize query item writting (Tvrtko) tweak uapi struct/define names (Tvrtko) v5: Replace ALIGN() macro (Chris) v6: Updated uapi comments (Tvrtko) Moved flags != 0 checks into vfuncs (Tvrtko) v7: Use access_ok() before copying anything, to avoid overflows (Chris) Switch BUG_ON() to GEM_WARN_ON() (Tvrtko) v8: Tweak uapi comments style to match the coding style (Lionel) v9: Fix error in comment about computation of enabled subslice (Tvrtko) v10: Fix/update comments in uAPI (Sagar) v11: Drop drm_i915_query_(slice|subslice|eu)_info in favor of a single drm_i915_query_topology_info (Joonas) v12: Add subslice_stride/eu_stride in drm_i915_query_topology_info (Joonas) v13: Fix comment in uAPI (Joonas) Signed-off-by:Lionel Landwerlin <lionel.g.landwerlin@intel.com> Acked-by:
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Lionel Landwerlin authored
There are a number of information that are readable from hardware registers and that we would like to make accessible to userspace. One particular example is the topology of the execution units (how are execution units grouped in subslices and slices and also which ones have been fused off for die recovery). At the moment the GET_PARAM ioctl covers some basic needs, but generally is only able to return a single value for each defined parameter. This is a bit problematic with topology descriptions which are array/maps of available units. This change introduces a new ioctl that can deal with requests to fill structures of potentially variable lengths. The user is expected fill a query with length fields set at 0 on the first call, the kernel then sets the length fields to the their expected values. A second call to the kernel with length fields at their expected values will trigger a copy of the data to the pointed memory locations. The scope of this uAPI is only to provide information to userspace, not to allow configuration of the device. v2: Simplify dispatcher code iteration (Tvrtko) Tweak uapi drm_i915_query_item structure (Tvrtko) v3: Rename pad fields into flags (Chris) Return error on flags field != 0 (Chris) Only copy length back to userspace in drm_i915_query_item (Chris) v4: Use array of functions instead of switch (Chris) v5: More comments in uapi (Tvrtko) Return query item errors in length field (All) v6: Tweak uapi comments style to match the coding style (Lionel) v7: Add i915_query.h (Joonas) v8: (Lionel) Change the behavior of the item iterator to report invalid queries into the query item rather than stopping the iteration. This enables userspace applications to query newer items on older kernels and only have failure on the items that are not supported. v9: Edit copyright headers (Joonas) v10: Typos & comments in uapi (Joonas) Signed-off-by: -
Lionel Landwerlin authored
This might be useful information for developers looking at an error state. v2: Place topology towards the end of the error state (Chris) v3: Reuse common printing code (Michal) v4: Make this a one-liner (Chris) Signed-off-by:
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Lionel Landwerlin authored
While the end goal is to make this information available to userspace through a new ioctl, there is no reason we can't display it in a human readable fashion through debugfs. slice0: 3 subslice(s) (0x7): subslice0: 8 EUs (0xff) subslice1: 8 EUs (0xff) subslice2: 8 EUs (0xff) subslice3: 0 EUs (0x0) slice1: 3 subslice(s) (0x7): subslice0: 8 EUs (0xff) subslice1: 8 EUs (0xff) subslice2: 8 EUs (0xff) subslice3: 0 EUs (0x0) slice2: 3 subslice(s) (0x7): subslice0: 8 EUs (0xff) subslice1: 8 EUs (0xff) subslice2: 8 EUs (0xff) subslice3: 0 EUs (0x0) v2: Reformat debugfs printing (Tvrtko) Use the new EU mask helper (Tvrtko) v3: Move printing code to intel_device_info.c to be shared with error state (Michal) v4: Bump u8 to u16 when using sseu_get_eus() (Lionel) Suggested-by: -
Lionel Landwerlin authored
Now that we have that information in topology fields, let's just reuse it. v2: Style tweaks (Tvrtko) Signed-off-by:
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Lionel Landwerlin authored
Up to now, subslice mask was assumed to be uniform across slices. But starting with Cannonlake, slices can be asymmetric (for example slice0 has different number of subslices as slice1+). This change stores all subslices masks for all slices rather than having a single mask that applies to all slices. v2: Rework how we store total numbers in sseu_dev_info (Tvrtko) Fix CHV eu masks, was reading disabled as enabled (Tvrtko) Readability changes (Tvrtko) Add EU index helper (Tvrtko) v3: Turn ALIGN(v, 8) / 8 into DIV_ROUND_UP(v, BITS_PER_BYTE) (Tvrtko) Reuse sseu_eu_idx() for setting eu_mask on CHV (Tvrtko) Reformat debug prints for subslices (Tvrtko) v4: Change eu_mask helper into sseu_set_eus() (Tvrtko) v5: With Haswell reporting masks & counts, bump sseu_*_eus() functions to use u16 (Lionel) v6: Fix sseu_get_eus() for > 8 EUs per subslice (Lionel) v7: Change debugfs enabels for number of subslices per slice, will need a small igt/pm_sseu change (Lionel) Drop subslice_total field from sseu_dev_info, rely on sseu_subslice_total() to recompute the value instead (Lionel) v8: Remove unused function compute_subslice_total() (Lionel) Signed-off-by: -
Andrew Morton authored
gcc-4.4.4 has problems with initalizers of anon unions. drivers/gpu/drm/i915/intel_guc_log.c: In function 'guc_log_control': drivers/gpu/drm/i915/intel_guc_log.c:64: error: unknown field 'logging_enabled' specified in initializer Work around this. Fixes: 35fe703c ("drm/i915/guc: Change values for i915_guc_log_control") Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180308001333.rI2vrNRTY%akpm@linux-foundation.org
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- 07 Mar, 2018 8 commits
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Rodrigo Vivi authored
"Clock gating bug in GWL may not clear barrier state when an EOT is received, causing a hang the next time that barrier is used." HSDES: 2201832410 Cc: Rafael Antognolli <rafael.antognolli@intel.com> Signed-off-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by:
Rafael Antognolli <rafael.antognolli@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180307220912.3681-1-rodrigo.vivi@intel.com
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Daniele Ceraolo Spurio authored
The main difference with previous GENs is that starting from Gen11 each VCS and VECS engine has its own power well, which only exist if the related engine exists in the HW. The fallback forcewake request workaround is only needed on gen9 according to the HSDES WA entry (1604254524), so we can go back to using the simpler fw_domains_get/put functions. BSpec: 18331 v2: fix fwtable, use array to test shadow tables, create new accessors to avoid check on every access (Tvrtko) v3 (from Paulo): Rebase. v4: - Range 09400-097FF should be FORCEWAKE_ALL (Daniele) - Use the BIT macro for forcewake domains (Daniele) - Add a comment about the range ordering (Oscar) - Updated commit message (Oscar) v5: Rebased v6: Use I915_MAX_VCS/VECS (Michal) v7: translate FORCEWAKE_ALL to available domains v8: rebase, add clarification on fallback ack in commit message. v9: fix rebase issue, change check in fw_domains_init from IS_GEN11 to GEN >= 11 v10: Generate is_genX_shadowed with a macro (Daniele) Include gen11_fw_ranges in the selftest (Michel) v11: Simplify FORCEWAKE_ALL, new line between NEEDS_FORCEWAKEs (Tvrtko) Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Acked-by:Michel Thierry <michel.thierry@intel.com> Signed-off-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by:
Oscar Mateo <oscar.mateo@intel.com> Signed-off-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com>
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Michel Thierry authored
v2: rebased to intel_lr_indirect_ctx_offset v3: rebase, move define to intel_lrc_reg.h BSpec: 11740 Signed-off-by:
Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by:
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Thomas Daniel authored
Enhanced Execlists is an upgraded version of execlists which supports up to 8 ports. The lrcs to be submitted are written to a submit queue (the ExecLists Submission Queue - ELSQ), which is then loaded on the HW. When writing to the ELSP register, the lrcs are written cyclically in the queue from position 0 to position 7. Alternatively, it is possible to write directly in the individual positions of the queue using the ELSQC registers. To be able to re-use all the existing code we're using the latter method and we're currently limiting ourself to only using 2 elements. v2: Rebase. v3: Switch from !IS_GEN11 to GEN < 11 (Daniele Ceraolo Spurio). v4: Use the elsq registers instead of elsp. (Daniele Ceraolo Spurio) v5: Reword commit, rename regs to be closer to specs, turn off preemption (Daniele), reuse engine->execlists.elsp (Chris) v6: use has_logical_ring_elsq to differentiate the new paths v7: add preemption support, rename els to submit_reg (Chris) v8: save the ctrl register inside the execlists struct, drop CSB handling updates (superseded by preempt_complete_status) (Chris) v9: s/drm_i915_gem_request/i915_request (Mika) v10: resolved conflict in inject_preempt_context (Mika) Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Signed-off-by:Thomas Daniel <thomas.daniel@intel.com> Signed-off-by:
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Daniele Ceraolo Spurio authored
Starting from Gen11 the context descriptor format has been updated in the HW. The hw_id field has been considerably reduced in size and engine class and instance fields have been added. There is a slight name clashing issue because the field that we call hw_id is actually called SW Context ID in the specs for Gen11+. With the current size of the hw_id field we can have a maximum of 2k contexts at any time, but we could use the sw_counter field (which is sw defined) to increase that because the HW requirement is that engine_id + sw id + sw_counter is a unique number. GuC uses a similar method to support more contexts but does its tracking at lrc level. To avoid doing an implementation that will need to be reworked once GuC support lands, defer it for now and mark it as TODO. v2: rebased, add documentation, fix GEN11_ENGINE_INSTANCE_SHIFT v3: rebased, bring back lost code from i915_gem_context.c v4: make TODO comment more generic v5: be consistent with bit ordering, add extra checks (Chris) Cc: Oscar Mateo <oscar.mateo@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Signed-off-by:
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Oscar Mateo authored
Gen11 has up to 4 VCS and up to 2 VECS engines, this patch adds mmio base definitions for all of them. Bspec: 20944 Bspec: 7021 v2: Set the correct mmio_base in intel_engines_init_mmio; updating the base mmio values any later would cause incorrect reads in i915_gem_sanitize (Michel). Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Ceraolo Spurio, Daniele <daniele.ceraolospurio@intel.com> Signed-off-by:
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Chris Wilson authored
After we call dma_fence_signal(), confirm that the request was indeed complete. Signed-off-by:
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Maarten Lankhorst authored
If i915.enable_fbc is cleared at runtime, but FBC was previously enabled then we don't disable FBC until the next time the crtc is disabled. Make sure that if the module param is changed, we disable FBC in intel_fbc_post_update so we never have to worry about disabling. Signed-off-by:
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- 06 Mar, 2018 20 commits
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Ville Syrjälä authored
LSPCON likes to throw short HPDs during the enable seqeunce prior to the link being trained. These obviously result in the channel CR/EQ check failing and thus we schedule a pointless hotplug work to retrain the link. Avoid that by ignoring the bad CR/EQ status until we've actually initially trained the link. I've not actually investigated to see what LSPCON is trying to signal with the short pulse. But as long as it signals anything I think we're supposed to check the link status anyway, so I don't really see other good ways to solve this. I've not seen these short pulses being generated by normal DP sinks. Signed-off-by:
Lyude Paul <lyude@redhat.com> Signed-off-by:
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Ville Syrjälä authored
intel_dp->channel_eq_status is used in exactly one function, and we don't need it to persist between calls. So just go back to using a local variable instead. Signed-off-by:
Manasi Navare <manasi.d.navare@intel.com> Signed-off-by:
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Ville Syrjälä authored
Doing link retraining from the short pulse handler is problematic since that might introduce deadlocks with MST sideband processing. Currently we don't retrain MST links from this code, but we want to change that. So better to move the entire thing to the hotplug work. We can utilize the new encoder->hotplug() hook for this. The only thing we leave in the short pulse handler is the link status check. That one still depends on the link parameters stored under intel_dp, so no locking around that but races should be mostly harmless as the actual retraining code will recheck the link state if we end up there by mistake. v2: Rebase due to ->post_hotplug() now being just ->hotplug() Check the connector type to figure out if we should do the HDMI thing or the DP think for DDI [pushed with whitespace changes for sparse] Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: -
Ville Syrjälä authored
The LG 4k TV I have doesn't deassert HPD when I turn the TV off, but when I turn it back on it will pulse the HPD line. By that time it has forgotten everything we told it about scrambling and the clock ratio. Hence if we want to get a picture out if it again we have to tell it whether we're currently sending scrambled data or not. Implement that via the encoder->hotplug() hook. v2: Force a full modeset to not follow the HDMI 2.0 spec more closely (Shashank) [pushed with whitespace fixes to make sparse happy] Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: -
Ville Syrjälä authored
Allow encoders to customize their hotplug processing by moving the intel_hpd_irq_event() code into an encoder hotplug vfunc. Currently only SDVO needs this to re-enable hotplug signalling in the SDVO chip. We'll use this same hook for DP/HDMI link management later. Reviewed-by:
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Rodrigo Vivi authored
No functional change since WA is already applied. But since it has different names on different databases, let's document it here to avoid future confusion. Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Signed-off-by:
Radhakrishna Sripada <radhakrishna.sripada@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180306012812.19779-1-rodrigo.vivi@intel.com
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Rodrigo Vivi authored
No functional change. WA is already properly applied. but in different databases it has different names. Let's document all of them to avoid future confusion. Cc: Rafael Antognolli <rafael.antognolli@intel.com> Signed-off-by:
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Dhinakaran Pandiyan authored
In fact, apply the Cannonlake resolution check for all >= Gen-10 platforms to be safe. v3: Update GLK too. (Ville) Longer variable names. if-else in place of ternary operator. v2: Use local variables for resolution limits and print them (Ville) Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Elio Martinez Monroy <elio.martinez.monroy@intel.com> Signed-off-by:Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Reviewed-by:
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Chris Wilson authored
Previously, we would spin waiting for all waiters to wake up and notice their request had completed before we would reset the seqno upon wraparound. However, we can mark their waits as complete and wake them up directly using the existing machinery for handling the flushing of missed wakeups when idling. Suggested-by:
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Chris Wilson authored
Since commit fd10e2ce ("drm/i915/breadcrumbs: Ignore unsubmitted signalers"), we cancel the signaler when retiring the request and so upon wraparound, where we wait for all requests to be retired, we no longer need to spin waiting for the signaling thread to release its references to the in-flight requests, and so we can assert that the signaler is idle. References: fd10e2ce ("drm/i915/breadcrumbs: Ignore unsubmitted signalers") Signed-off-by:
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Chris Wilson authored
When parking the engines and their breadcrumbs, if we have waiters left then they missed their wakeup. Verify that each waiter's seqno did complete. Signed-off-by:
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Chris Wilson authored
The goal here is to try and reduce the latency of signaling additional requests following the wakeup from interrupt by reducing the list of to-be-signaled requests from an rbtree to a sorted linked list. The original choice of using an rbtree was to facilitate random insertions of request into the signaler while maintaining a sorted list. However, if we assume that most new requests are added when they are submitted, we see those new requests in execution order making a insertion sort fast, and the reduction in overhead of each signaler iteration significant. Since commit 56299fb7 ("drm/i915: Signal first fence from irq handler if complete"), we signal most fences directly from notify_ring() in the interrupt handler greatly reducing the amount of work that actually needs to be done by the signaler kthread. All the thread is then required to do is operate as the bottom-half, cleaning up after the interrupt handler and preparing the next waiter. This includes signaling all later completed fences in a saturated system, but on a mostly idle system we only have to rebuild the wait rbtree in time for the next interrupt. With this de-emphasis of the signaler's role, we want to rejig it's datastructures to reduce the amount of work we require to both setup the signal tree and maintain it on every interrupt. References: 56299fb7 ("drm/i915: Signal first fence from irq handler if complete") Signed-off-by:
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Daniele Ceraolo Spurio authored
error->device_info.has_guc, which we check in capture_uc_state, is set in capture_gen_state, so the latter needs to be performed first. v2: rebased Reported-by:
Vinay Belgaumkar <vinay.belgaumkar@intel.com> Fixes: 7d41ef34 (drm/i915: Add Guc/HuC firmware details to error state) Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
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Daniele Ceraolo Spurio authored
some of the static functions used from capture() have the "i915_" prefix while other don't; most of them take i915 as a parameter, but one of them derives it internally from error->i915. Let's be consistent by avoiding prefix for static functions and by getting i915 from error->i915. While at it, s/dev_priv/i915 in functions that don't perform register reads. v2: take i915 from error->i915 (Michal), s/dev_priv/i915, update commit message Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: -
Daniele Ceraolo Spurio authored
Leftover from Gen8 ringbuffer support removal Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
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Xiong Zhang authored
In XenGT, ioreq copy is used to trap mmio write and ppgtt write. Both of them are memory write, ioreq handler couldn't distinguish them. So ioreq handler probe the ppgtt write handler, if it is succuess, this ioreq is ppgtt write, otherwise it is mmio write. So ppgtt write handler should return an error at the failure of finding page track, it is fatal to implement ioreq handler in XenGT. Signed-off-by:
Xiong Zhang <xiong.y.zhang@intel.com> Signed-off-by:
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Xiong Zhang authored
page_track_handler take lock at the beginning, the lock should be released at the failure of finding page track. Otherwise deadlock will happen. Fixes: e502a2af ("drm/i915/gvt: Provide generic page_track infrastructure for write-protected page") Signed-off-by:
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Changbin Du authored
Add a new debugfs entry kvmgt_nr_cache_entries under vgpu which shows the number of entry in dma cache. $ cat /sys/kernel/debug/gvt/vgpu1/kvmgt_nr_cache_entries 10101 v3: fix compiling error for some configuration. (Xiong Zhang <xiong.y.zhang@intel.com>) v2: keep debugfs layout flat. Signed-off-by:
Changbin Du <changbin.du@intel.com> Signed-off-by:
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Changbin Du authored
The implementation of current kvmgt implicitly setup dma mapping at MPT API gfn_to_mfn. First this design against the API's original purpose. Second, there is no unmap hit in this design. The result is that the dma mapping keep growing larger and larger. For mutl-vm case, they will consume IOMMU IOVA low 4GB address space quickly and so tons of rbtree entries crated in the IOMMU IOVA allocator. Finally, single IOVA allocation can take as long as ~70ms. Such latency is intolerable. To address both above issues, this patch introduced two new MPT API: o dma_map_guest_page - setup dma map for guest page o dma_unmap_guest_page - cancel dma map for guest page The kvmgt implements these 2 API. And to reduce dma setup overhead for duplicated pages (eg. scratch pages), two caches are used: one is for mapping gfn to struct gvt_dma, another is for mapping dma addr to struct gvt_dma. With these 2 new API, the gtt now is able to cancel dma mapping when page table is invalidated. The dma mapping is not in a gradual increase now. v2: follow the old logic for VFIO_IOMMU_NOTIFY_DMA_UNMAP at this point. Cc: Hang Yuan <hang.yuan@intel.com> Cc: Xiong Zhang <xiong.y.zhang@intel.com> Signed-off-by:
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Zhenyu Wang authored
Fix below check error by using proper failure message output. drivers/gpu/drm/i915//gvt/handlers.c:1392 hws_pga_write() error: 'vgpu' dereferencing possible ERR_PTR() drivers/gpu/drm/i915//gvt/handlers.c:1402 hws_pga_write() error: 'vgpu' dereferencing possible ERR_PTR() Reviewed-by:
Zhi Wang <zhi.a.wang@intel.com> Signed-off-by:
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