On Mon, 09 Oct 2023, Tvrtko Ursulin <[email protected]> wrote: > On 06/10/2023 19:20, Jonathan Cavitt wrote: >> In case of GT is suspended, don't allow submission of new TLB invalidation >> request and cancel all pending requests. The TLB entries will be >> invalidated either during GuC reload or on system resume. >> >> Signed-off-by: Fei Yang <[email protected]> >> Signed-off-by: Jonathan Cavitt <[email protected]> >> CC: John Harrison <[email protected]> >> --- >> drivers/gpu/drm/i915/gt/intel_gt.h | 1 + >> drivers/gpu/drm/i915/gt/uc/intel_guc.h | 1 + >> .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 23 +++++++++++++++---- >> drivers/gpu/drm/i915/gt/uc/intel_uc.c | 8 +++++++ >> drivers/gpu/drm/i915/i915_driver.c | 2 ++ >> 5 files changed, 31 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h >> b/drivers/gpu/drm/i915/gt/intel_gt.h >> index 970bedf6b78a7..4e3bb221d2f4d 100644 >> --- a/drivers/gpu/drm/i915/gt/intel_gt.h >> +++ b/drivers/gpu/drm/i915/gt/intel_gt.h >> @@ -179,4 +179,5 @@ enum i915_map_type intel_gt_coherent_map_type(struct >> intel_gt *gt, >> void intel_gt_bind_context_set_ready(struct intel_gt *gt); >> void intel_gt_bind_context_set_unready(struct intel_gt *gt); >> bool intel_gt_is_bind_context_ready(struct intel_gt *gt); >> + > > Zap this. > >> #endif /* __INTEL_GT_H__ */ >> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h >> b/drivers/gpu/drm/i915/gt/uc/intel_guc.h >> index 88deb43bbdc48..add74000e621e 100644 >> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h >> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h >> @@ -536,4 +536,5 @@ void intel_guc_dump_time_info(struct intel_guc *guc, >> struct drm_printer *p); >> >> int intel_guc_sched_disable_gucid_threshold_max(struct intel_guc *guc); >> >> +void wake_up_all_tlb_invalidate(struct intel_guc *guc); >> #endif >> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c >> b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c >> index 0c5ccda1b3e87..4ed6e9e759007 100644 >> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c >> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c >> @@ -1796,13 +1796,23 @@ static void __guc_reset_context(struct intel_context >> *ce, intel_engine_mask_t st >> intel_context_put(parent); >> } >> >> -void intel_guc_submission_reset(struct intel_guc *guc, intel_engine_mask_t >> stalled) >> +void wake_up_all_tlb_invalidate(struct intel_guc *guc) >> { >> struct intel_guc_tlb_wait *wait; >> + unsigned long i; >> + >> + if (!HAS_GUC_TLB_INVALIDATION(guc_to_gt(guc)->i915)) >> + return; >> + xa_for_each(&guc->tlb_lookup, i, wait) { >> + wake_up(&wait->wq); >> + } > > Drop the curlies? > >> +} >> + >> +void intel_guc_submission_reset(struct intel_guc *guc, intel_engine_mask_t >> stalled) >> +{ >> struct intel_context *ce; >> unsigned long index; >> unsigned long flags; >> - unsigned long i; >> >> if (unlikely(!guc_submission_initialized(guc))) { >> /* Reset called during driver load? GuC not yet initialised! */ >> @@ -1838,8 +1848,7 @@ void intel_guc_submission_reset(struct intel_guc *guc, >> intel_engine_mask_t stall >> * invalidations on GT reset, and there's a large window of time >> * between the GT reset and GuC becoming available. >> */ >> - xa_for_each(&guc->tlb_lookup, i, wait) >> - wake_up(&wait->wq); >> + wake_up_all_tlb_invalidate(guc); >> } >> >> static void guc_cancel_context_requests(struct intel_context *ce) >> @@ -1935,6 +1944,12 @@ void intel_guc_submission_cancel_requests(struct >> intel_guc *guc) >> >> /* GuC is blown away, drop all references to contexts */ >> xa_destroy(&guc->context_lookup); >> + >> + /* >> + * Wedged GT won't respond to any TLB invalidation request. Simply >> + * release all the blocked waiters. >> + */ >> + wake_up_all_tlb_invalidate(guc); > > This goes to the following patch I think. > >> } >> >> void intel_guc_submission_reset_finish(struct intel_guc *guc) >> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c >> b/drivers/gpu/drm/i915/gt/uc/intel_uc.c >> index 98b103375b7ab..8d6a4d8ce61bb 100644 >> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c >> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c >> @@ -688,6 +688,9 @@ void intel_uc_suspend(struct intel_uc *uc) >> /* flush the GSC worker */ >> intel_gsc_uc_flush_work(&uc->gsc); >> >> + if (HAS_GUC_TLB_INVALIDATION(guc_to_gt(guc)->i915)) >> + wake_up_all_tlb_invalidate(guc); >> + >> if (!intel_guc_is_ready(guc)) { >> guc->interrupts.enabled = false; >> return; >> @@ -736,6 +739,11 @@ static int __uc_resume(struct intel_uc *uc, bool >> enable_communication) >> >> intel_gsc_uc_resume(&uc->gsc); >> >> + if (HAS_GUC_TLB_INVALIDATION(gt->i915)) { >> + intel_guc_invalidate_tlb_engines(guc); >> + intel_guc_invalidate_tlb_guc(guc); >> + } >> + >> return 0; >> } >> >> diff --git a/drivers/gpu/drm/i915/i915_driver.c >> b/drivers/gpu/drm/i915/i915_driver.c >> index ccbb2834cde07..85ac9400c2dc7 100644 >> --- a/drivers/gpu/drm/i915/i915_driver.c >> +++ b/drivers/gpu/drm/i915/i915_driver.c >> @@ -72,6 +72,7 @@ >> #include "gt/intel_gt.h" >> #include "gt/intel_gt_pm.h" >> #include "gt/intel_rc6.h" >> +#include "gt/intel_tlb.h"
Does not belong in this patch. >> >> #include "pxp/intel_pxp.h" >> #include "pxp/intel_pxp_debugfs.h" >> @@ -1093,6 +1094,7 @@ static int i915_drm_suspend(struct drm_device *dev) >> intel_dp_mst_suspend(dev_priv); >> >> intel_runtime_pm_disable_interrupts(dev_priv); >> + > > Zap this too please. > >> intel_hpd_cancel_work(dev_priv); >> >> intel_suspend_encoders(dev_priv); > > Patch got smaller and will be smaller still which is neat! If it is > still functionally correct it is a win-win. > > Regards, > > Tvrtko -- Jani Nikula, Intel
