1 files changed, 181 insertions, 35 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 4033184f13b9..b1b8695ba7c9 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -6,29 +6,30 @@
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_pm.h"
 
+#include "i915_drm_client.h"
 #include "i915_drv.h"
-#include "i915_globals.h"
+#include "i915_trace.h"
 
 #include "intel_context.h"
 #include "intel_engine.h"
 #include "intel_engine_pm.h"
 #include "intel_ring.h"
 
-static struct i915_global_context {
-	struct i915_global base;
-	struct kmem_cache *slab_ce;
-} global;
+static struct kmem_cache *slab_ce;
 
 static struct intel_context *intel_context_alloc(void)
 {
-	return kmem_cache_zalloc(global.slab_ce, GFP_KERNEL);
+	return kmem_cache_zalloc(slab_ce, GFP_KERNEL);
 }
 
 static void rcu_context_free(struct rcu_head *rcu)
 {
 	struct intel_context *ce = container_of(rcu, typeof(*ce), rcu);
 
-	kmem_cache_free(global.slab_ce, ce);
+	trace_intel_context_free(ce);
+	if (intel_context_has_own_state(ce))
+		fput(ce->default_state);
+	kmem_cache_free(slab_ce, ce);
 }
 
 void intel_context_free(struct intel_context *ce)
@@ -46,11 +47,13 @@ intel_context_create(struct intel_engine_cs *engine)
 		return ERR_PTR(-ENOMEM);
 
 	intel_context_init(ce, engine);
+	trace_intel_context_create(ce);
 	return ce;
 }
 
 int intel_context_alloc_state(struct intel_context *ce)
 {
+	struct i915_gem_context *ctx;
 	int err = 0;
 
 	if (mutex_lock_interruptible(&ce->pin_mutex))
@@ -67,6 +70,18 @@ int intel_context_alloc_state(struct intel_context *ce)
 			goto unlock;
 
 		set_bit(CONTEXT_ALLOC_BIT, &ce->flags);
+
+		rcu_read_lock();
+		ctx = rcu_dereference(ce->gem_context);
+		if (ctx && !kref_get_unless_zero(&ctx->ref))
+			ctx = NULL;
+		rcu_read_unlock();
+		if (ctx) {
+			if (ctx->client)
+				i915_drm_client_add_context_objects(ctx->client,
+								    ce);
+			i915_gem_context_put(ctx);
+		}
 	}
 
 unlock:
@@ -80,7 +95,8 @@ static int intel_context_active_acquire(struct intel_context *ce)
 
 	__i915_active_acquire(&ce->active);
 
-	if (intel_context_is_barrier(ce))
+	if (intel_context_is_barrier(ce) || intel_engine_uses_guc(ce->engine) ||
+	    intel_context_is_parallel(ce))
 		return 0;
 
 	/* Preallocate tracking nodes */
@@ -220,7 +236,7 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
 	 */
 
 	err = i915_gem_object_lock(ce->timeline->hwsp_ggtt->obj, ww);
-	if (!err && ce->ring->vma->obj)
+	if (!err)
 		err = i915_gem_object_lock(ce->ring->vma->obj, ww);
 	if (!err && ce->state)
 		err = i915_gem_object_lock(ce->state->obj, ww);
@@ -229,17 +245,19 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
 	if (err)
 		return err;
 
-	err = i915_active_acquire(&ce->active);
+	err = ce->ops->pre_pin(ce, ww, &vaddr);
 	if (err)
 		goto err_ctx_unpin;
 
-	err = ce->ops->pre_pin(ce, ww, &vaddr);
+	err = i915_active_acquire(&ce->active);
 	if (err)
-		goto err_release;
+		goto err_post_unpin;
 
 	err = mutex_lock_interruptible(&ce->pin_mutex);
 	if (err)
-		goto err_post_unpin;
+		goto err_release;
+
+	intel_engine_pm_might_get(ce->engine);
 
 	if (unlikely(intel_context_is_closed(ce))) {
 		err = -ENOENT;
@@ -268,13 +286,15 @@ int __intel_context_do_pin_ww(struct intel_context *ce,
 
 	GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */
 
+	trace_intel_context_do_pin(ce);
+
 err_unlock:
 	mutex_unlock(&ce->pin_mutex);
+err_release:
+	i915_active_release(&ce->active);
 err_post_unpin:
 	if (!handoff)
 		ce->ops->post_unpin(ce);
-err_release:
-	i915_active_release(&ce->active);
 err_ctx_unpin:
 	intel_context_post_unpin(ce);
 
@@ -306,9 +326,9 @@ retry:
 	return err;
 }
 
-void intel_context_unpin(struct intel_context *ce)
+void __intel_context_do_unpin(struct intel_context *ce, int sub)
 {
-	if (!atomic_dec_and_test(&ce->pin_count))
+	if (!atomic_sub_and_test(sub, &ce->pin_count))
 		return;
 
 	CE_TRACE(ce, "unpin\n");
@@ -323,6 +343,7 @@ void intel_context_unpin(struct intel_context *ce)
 	 */
 	intel_context_get(ce);
 	intel_context_active_release(ce);
+	trace_intel_context_do_unpin(ce);
 	intel_context_put(ce);
 }
 
@@ -360,6 +381,13 @@ static int __intel_context_active(struct i915_active *active)
 	return 0;
 }
 
+static int
+sw_fence_dummy_notify(struct i915_sw_fence *sf,
+		      enum i915_sw_fence_notify state)
+{
+	return NOTIFY_DONE;
+}
+
 void
 intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 {
@@ -371,9 +399,10 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 	ce->engine = engine;
 	ce->ops = engine->cops;
 	ce->sseu = engine->sseu;
-	ce->ring = __intel_context_ring_size(SZ_4K);
+	ce->ring = NULL;
+	ce->ring_size = SZ_4K;
 
-	ewma_runtime_init(&ce->runtime.avg);
+	ewma_runtime_init(&ce->stats.runtime.avg);
 
 	ce->vm = i915_vm_get(engine->gt->vm);
 
@@ -383,42 +412,58 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 
 	mutex_init(&ce->pin_mutex);
 
+	spin_lock_init(&ce->guc_state.lock);
+	INIT_LIST_HEAD(&ce->guc_state.fences);
+	INIT_LIST_HEAD(&ce->guc_state.requests);
+
+	ce->guc_id.id = GUC_INVALID_CONTEXT_ID;
+	INIT_LIST_HEAD(&ce->guc_id.link);
+
+	INIT_LIST_HEAD(&ce->destroyed_link);
+
+	INIT_LIST_HEAD(&ce->parallel.child_list);
+
+	/*
+	 * Initialize fence to be complete as this is expected to be complete
+	 * unless there is a pending schedule disable outstanding.
+	 */
+	i915_sw_fence_init(&ce->guc_state.blocked,
+			   sw_fence_dummy_notify);
+	i915_sw_fence_commit(&ce->guc_state.blocked);
+
 	i915_active_init(&ce->active,
 			 __intel_context_active, __intel_context_retire, 0);
 }
 
 void intel_context_fini(struct intel_context *ce)
 {
+	struct intel_context *child, *next;
+
 	if (ce->timeline)
 		intel_timeline_put(ce->timeline);
 	i915_vm_put(ce->vm);
 
+	/* Need to put the creation ref for the children */
+	if (intel_context_is_parent(ce))
+		for_each_child_safe(ce, child, next)
+			intel_context_put(child);
+
 	mutex_destroy(&ce->pin_mutex);
 	i915_active_fini(&ce->active);
+	i915_sw_fence_fini(&ce->guc_state.blocked);
 }
 
-static void i915_global_context_shrink(void)
-{
-	kmem_cache_shrink(global.slab_ce);
-}
-
-static void i915_global_context_exit(void)
+void i915_context_module_exit(void)
 {
-	kmem_cache_destroy(global.slab_ce);
+	kmem_cache_destroy(slab_ce);
 }
 
-static struct i915_global_context global = { {
-	.shrink = i915_global_context_shrink,
-	.exit = i915_global_context_exit,
-} };
-
-int __init i915_global_context_init(void)
+int __init i915_context_module_init(void)
 {
-	global.slab_ce = KMEM_CACHE(intel_context, SLAB_HWCACHE_ALIGN);
-	if (!global.slab_ce)
+	slab_ce = KMEM_CACHE(intel_context, SLAB_HWCACHE_ALIGN);
+	if (!slab_ce)
 		return -ENOMEM;
 
-	i915_global_register(&global.base);
 	return 0;
 }
 
@@ -499,6 +544,107 @@ retry:
 	return rq;
 }
 
+struct i915_request *intel_context_get_active_request(struct intel_context *ce)
+{
+	struct intel_context *parent = intel_context_to_parent(ce);
+	struct i915_request *rq, *active = NULL;
+	unsigned long flags;
+
+	GEM_BUG_ON(!intel_engine_uses_guc(ce->engine));
+
+	/*
+	 * We search the parent list to find an active request on the submitted
+	 * context. The parent list contains the requests for all the contexts
+	 * in the relationship so we have to do a compare of each request's
+	 * context.
+	 */
+	spin_lock_irqsave(&parent->guc_state.lock, flags);
+	list_for_each_entry_reverse(rq, &parent->guc_state.requests,
+				    sched.link) {
+		if (rq->context != ce)
+			continue;
+		if (i915_request_completed(rq))
+			break;
+
+		active = rq;
+	}
+	if (active)
+		active = i915_request_get_rcu(active);
+	spin_unlock_irqrestore(&parent->guc_state.lock, flags);
+
+	return active;
+}
+
+void intel_context_bind_parent_child(struct intel_context *parent,
+				     struct intel_context *child)
+{
+	/*
+	 * Callers responsibility to validate that this function is used
+	 * correctly but we use GEM_BUG_ON here ensure that they do.
+	 */
+	GEM_BUG_ON(intel_context_is_pinned(parent));
+	GEM_BUG_ON(intel_context_is_child(parent));
+	GEM_BUG_ON(intel_context_is_pinned(child));
+	GEM_BUG_ON(intel_context_is_child(child));
+	GEM_BUG_ON(intel_context_is_parent(child));
+
+	parent->parallel.child_index = parent->parallel.number_children++;
+	list_add_tail(&child->parallel.child_link,
+		      &parent->parallel.child_list);
+	child->parallel.parent = parent;
+}
+
+u64 intel_context_get_total_runtime_ns(struct intel_context *ce)
+{
+	u64 total, active;
+
+	if (ce->ops->update_stats)
+		ce->ops->update_stats(ce);
+
+	total = ce->stats.runtime.total;
+	if (ce->ops->flags & COPS_RUNTIME_CYCLES)
+		total *= ce->engine->gt->clock_period_ns;
+
+	active = READ_ONCE(ce->stats.active);
+	if (active)
+		active = intel_context_clock() - active;
+
+	return total + active;
+}
+
+u64 intel_context_get_avg_runtime_ns(struct intel_context *ce)
+{
+	u64 avg = ewma_runtime_read(&ce->stats.runtime.avg);
+
+	if (ce->ops->flags & COPS_RUNTIME_CYCLES)
+		avg *= ce->engine->gt->clock_period_ns;
+
+	return avg;
+}
+
+bool intel_context_ban(struct intel_context *ce, struct i915_request *rq)
+{
+	bool ret = intel_context_set_banned(ce);
+
+	trace_intel_context_ban(ce);
+
+	if (ce->ops->revoke)
+		ce->ops->revoke(ce, rq,
+				INTEL_CONTEXT_BANNED_PREEMPT_TIMEOUT_MS);
+
+	return ret;
+}
+
+bool intel_context_revoke(struct intel_context *ce)
+{
+	bool ret = intel_context_set_exiting(ce);
+
+	if (ce->ops->revoke)
+		ce->ops->revoke(ce, NULL, ce->engine->props.preempt_timeout_ms);
+
+	return ret;
+}
+
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftest_context.c"
 #endif