diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_pm.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_context.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_lrc.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_timeline.c | 98 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_timeline.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_timeline_types.h | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/selftest_timeline.c | 2 |
8 files changed, 64 insertions, 66 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_pm.c index 17e3618241c5..92e53c25424c 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pm.c @@ -37,7 +37,6 @@ static void i915_gem_park(struct drm_i915_private *i915) for_each_engine(engine, i915, id) call_idle_barriers(engine); /* cleanup after wedging */ - intel_timelines_park(i915); i915_vma_parked(i915); i915_globals_park(); diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 77833f1558a9..9114953bf920 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -280,10 +280,12 @@ int __init i915_global_context_init(void) void intel_context_enter_engine(struct intel_context *ce) { intel_engine_pm_get(ce->engine); + intel_timeline_enter(ce->timeline); } void intel_context_exit_engine(struct intel_context *ce) { + intel_timeline_exit(ce->timeline); intel_engine_pm_put(ce->engine); } diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c index 49ad02c3720f..f3f0109f9e22 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c @@ -66,6 +66,8 @@ static bool switch_to_kernel_context(struct intel_engine_cs *engine) /* Context switch failed, hope for the best! Maybe reset? */ return true; + intel_timeline_enter(rq->timeline); + /* Check again on the next retirement. */ engine->wakeref_serial = engine->serial + 1; i915_request_add_active_barriers(rq); diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index a5d9b902d6e3..b4c2662dbc75 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -3306,6 +3306,8 @@ static void virtual_context_enter(struct intel_context *ce) for (n = 0; n < ve->num_siblings; n++) intel_engine_pm_get(ve->siblings[n]); + + intel_timeline_enter(ce->timeline); } static void virtual_context_exit(struct intel_context *ce) @@ -3313,6 +3315,8 @@ static void virtual_context_exit(struct intel_context *ce) struct virtual_engine *ve = container_of(ce, typeof(*ve), context); unsigned int n; + intel_timeline_exit(ce->timeline); + for (n = 0; n < ve->num_siblings; n++) intel_engine_pm_put(ve->siblings[n]); } diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c index 6daa9eb59e19..4af0b9801d91 100644 --- a/drivers/gpu/drm/i915/gt/intel_timeline.c +++ b/drivers/gpu/drm/i915/gt/intel_timeline.c @@ -278,64 +278,11 @@ void intel_timelines_init(struct drm_i915_private *i915) timelines_init(&i915->gt); } -static void timeline_add_to_active(struct intel_timeline *tl) -{ - struct intel_gt_timelines *gt = &tl->gt->timelines; - - mutex_lock(>->mutex); - list_add(&tl->link, >->active_list); - mutex_unlock(>->mutex); -} - -static void timeline_remove_from_active(struct intel_timeline *tl) -{ - struct intel_gt_timelines *gt = &tl->gt->timelines; - - mutex_lock(>->mutex); - list_del(&tl->link); - mutex_unlock(>->mutex); -} - -static void timelines_park(struct intel_gt *gt) -{ - struct intel_gt_timelines *timelines = >->timelines; - struct intel_timeline *timeline; - - mutex_lock(&timelines->mutex); - list_for_each_entry(timeline, &timelines->active_list, link) { - /* - * All known fences are completed so we can scrap - * the current sync point tracking and start afresh, - * any attempt to wait upon a previous sync point - * will be skipped as the fence was signaled. - */ - i915_syncmap_free(&timeline->sync); - } - mutex_unlock(&timelines->mutex); -} - -/** - * intel_timelines_park - called when the driver idles - * @i915: the drm_i915_private device - * - * When the driver is completely idle, we know that all of our sync points - * have been signaled and our tracking is then entirely redundant. Any request - * to wait upon an older sync point will be completed instantly as we know - * the fence is signaled and therefore we will not even look them up in the - * sync point map. - */ -void intel_timelines_park(struct drm_i915_private *i915) -{ - timelines_park(&i915->gt); -} - void intel_timeline_fini(struct intel_timeline *timeline) { GEM_BUG_ON(timeline->pin_count); GEM_BUG_ON(!list_empty(&timeline->requests)); - i915_syncmap_free(&timeline->sync); - if (timeline->hwsp_cacheline) cacheline_free(timeline->hwsp_cacheline); else @@ -370,6 +317,7 @@ int intel_timeline_pin(struct intel_timeline *tl) if (tl->pin_count++) return 0; GEM_BUG_ON(!tl->pin_count); + GEM_BUG_ON(tl->active_count); err = i915_vma_pin(tl->hwsp_ggtt, 0, 0, PIN_GLOBAL | PIN_HIGH); if (err) @@ -380,7 +328,6 @@ int intel_timeline_pin(struct intel_timeline *tl) offset_in_page(tl->hwsp_offset); cacheline_acquire(tl->hwsp_cacheline); - timeline_add_to_active(tl); return 0; @@ -389,6 +336,40 @@ unpin: return err; } +void intel_timeline_enter(struct intel_timeline *tl) +{ + struct intel_gt_timelines *timelines = &tl->gt->timelines; + + GEM_BUG_ON(!tl->pin_count); + if (tl->active_count++) + return; + GEM_BUG_ON(!tl->active_count); /* overflow? */ + + mutex_lock(&timelines->mutex); + list_add(&tl->link, &timelines->active_list); + mutex_unlock(&timelines->mutex); +} + +void intel_timeline_exit(struct intel_timeline *tl) +{ + struct intel_gt_timelines *timelines = &tl->gt->timelines; + + GEM_BUG_ON(!tl->active_count); + if (--tl->active_count) + return; + + mutex_lock(&timelines->mutex); + list_del(&tl->link); + mutex_unlock(&timelines->mutex); + + /* + * Since this timeline is idle, all bariers upon which we were waiting + * must also be complete and so we can discard the last used barriers + * without loss of information. + */ + i915_syncmap_free(&tl->sync); +} + static u32 timeline_advance(struct intel_timeline *tl) { GEM_BUG_ON(!tl->pin_count); @@ -546,16 +527,9 @@ void intel_timeline_unpin(struct intel_timeline *tl) if (--tl->pin_count) return; - timeline_remove_from_active(tl); + GEM_BUG_ON(tl->active_count); cacheline_release(tl->hwsp_cacheline); - /* - * Since this timeline is idle, all bariers upon which we were waiting - * must also be complete and so we can discard the last used barriers - * without loss of information. - */ - i915_syncmap_free(&tl->sync); - __i915_vma_unpin(tl->hwsp_ggtt); } diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.h b/drivers/gpu/drm/i915/gt/intel_timeline.h index e08cebf64833..f583af1ba18d 100644 --- a/drivers/gpu/drm/i915/gt/intel_timeline.h +++ b/drivers/gpu/drm/i915/gt/intel_timeline.h @@ -77,9 +77,11 @@ static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl, } int intel_timeline_pin(struct intel_timeline *tl); +void intel_timeline_enter(struct intel_timeline *tl); int intel_timeline_get_seqno(struct intel_timeline *tl, struct i915_request *rq, u32 *seqno); +void intel_timeline_exit(struct intel_timeline *tl); void intel_timeline_unpin(struct intel_timeline *tl); int intel_timeline_read_hwsp(struct i915_request *from, @@ -87,7 +89,6 @@ int intel_timeline_read_hwsp(struct i915_request *from, u32 *hwsp_offset); void intel_timelines_init(struct drm_i915_private *i915); -void intel_timelines_park(struct drm_i915_private *i915); void intel_timelines_fini(struct drm_i915_private *i915); #endif diff --git a/drivers/gpu/drm/i915/gt/intel_timeline_types.h b/drivers/gpu/drm/i915/gt/intel_timeline_types.h index 9a71aea7a338..b1a9f0c54bf0 100644 --- a/drivers/gpu/drm/i915/gt/intel_timeline_types.h +++ b/drivers/gpu/drm/i915/gt/intel_timeline_types.h @@ -25,7 +25,25 @@ struct intel_timeline { struct mutex mutex; /* protects the flow of requests */ + /* + * pin_count and active_count track essentially the same thing: + * How many requests are in flight or may be under construction. + * + * We need two distinct counters so that we can assign different + * lifetimes to the events for different use-cases. For example, + * we want to permanently keep the timeline pinned for the kernel + * context so that we can issue requests at any time without having + * to acquire space in the GGTT. However, we want to keep tracking + * the activity (to be able to detect when we become idle) along that + * permanently pinned timeline and so end up requiring two counters. + * + * Note that the active_count is protected by the intel_timeline.mutex, + * but the pin_count is protected by a combination of serialisation + * from the intel_context caller plus internal atomicity. + */ unsigned int pin_count; + unsigned int active_count; + const u32 *hwsp_seqno; struct i915_vma *hwsp_ggtt; u32 hwsp_offset; diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c index f0a840030382..d54113697745 100644 --- a/drivers/gpu/drm/i915/gt/selftest_timeline.c +++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c @@ -816,8 +816,6 @@ static int live_hwsp_recycle(void *arg) if (err) goto out; - - intel_timelines_park(i915); /* Encourage recycling! */ } while (!__igt_timeout(end_time, NULL)); } |
