1 files changed, 259 insertions, 0 deletions
diff --git a/driver/product/kernel/drivers/gpu/arm/midgard/mali_kbase_event.c b/driver/product/kernel/drivers/gpu/arm/midgard/mali_kbase_event.c
new file mode 100755
index 0000000..1881486
--- /dev/null
+++ b/driver/product/kernel/drivers/gpu/arm/midgard/mali_kbase_event.c
@@ -0,0 +1,259 @@
+/*
+ *
+ * (C) COPYRIGHT 2010-2016 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained
+ * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+
+
+
+#include <mali_kbase.h>
+#include <mali_kbase_debug.h>
+#include <mali_kbase_tlstream.h>
+
+static struct base_jd_udata kbase_event_process(struct kbase_context *kctx, struct kbase_jd_atom *katom)
+{
+	struct base_jd_udata data;
+
+	lockdep_assert_held(&kctx->jctx.lock);
+
+	KBASE_DEBUG_ASSERT(kctx != NULL);
+	KBASE_DEBUG_ASSERT(katom != NULL);
+	KBASE_DEBUG_ASSERT(katom->status == KBASE_JD_ATOM_STATE_COMPLETED);
+
+	data = katom->udata;
+
+	KBASE_TIMELINE_ATOMS_IN_FLIGHT(kctx, atomic_sub_return(1, &kctx->timeline.jd_atoms_in_flight));
+
+	KBASE_TLSTREAM_TL_NRET_ATOM_CTX(katom, kctx);
+	KBASE_TLSTREAM_TL_DEL_ATOM(katom);
+
+	katom->status = KBASE_JD_ATOM_STATE_UNUSED;
+
+	wake_up(&katom->completed);
+
+	return data;
+}
+
+int kbase_event_pending(struct kbase_context *ctx)
+{
+	KBASE_DEBUG_ASSERT(ctx);
+
+	return (atomic_read(&ctx->event_count) != 0) ||
+			(atomic_read(&ctx->event_closed) != 0);
+}
+
+KBASE_EXPORT_TEST_API(kbase_event_pending);
+
+int kbase_event_dequeue(struct kbase_context *ctx, struct base_jd_event_v2 *uevent)
+{
+	struct kbase_jd_atom *atom;
+
+	KBASE_DEBUG_ASSERT(ctx);
+
+	mutex_lock(&ctx->event_mutex);
+
+	if (list_empty(&ctx->event_list)) {
+		if (!atomic_read(&ctx->event_closed)) {
+			mutex_unlock(&ctx->event_mutex);
+			return -1;
+		}
+
+		/* generate the BASE_JD_EVENT_DRV_TERMINATED message on the fly */
+		mutex_unlock(&ctx->event_mutex);
+		uevent->event_code = BASE_JD_EVENT_DRV_TERMINATED;
+		memset(&uevent->udata, 0, sizeof(uevent->udata));
+		dev_dbg(ctx->kbdev->dev,
+				"event system closed, returning BASE_JD_EVENT_DRV_TERMINATED(0x%X)\n",
+				BASE_JD_EVENT_DRV_TERMINATED);
+		return 0;
+	}
+
+	/* normal event processing */
+	atomic_dec(&ctx->event_count);
+	atom = list_entry(ctx->event_list.next, struct kbase_jd_atom, dep_item[0]);
+	list_del(ctx->event_list.next);
+
+	mutex_unlock(&ctx->event_mutex);
+
+	dev_dbg(ctx->kbdev->dev, "event dequeuing %p\n", (void *)atom);
+	uevent->event_code = atom->event_code;
+	uevent->atom_number = (atom - ctx->jctx.atoms);
+
+	if (atom->core_req & BASE_JD_REQ_EXTERNAL_RESOURCES)
+		kbase_jd_free_external_resources(atom);
+
+	mutex_lock(&ctx->jctx.lock);
+	uevent->udata = kbase_event_process(ctx, atom);
+	mutex_unlock(&ctx->jctx.lock);
+
+	return 0;
+}
+
+KBASE_EXPORT_TEST_API(kbase_event_dequeue);
+
+/**
+ * kbase_event_process_noreport_worker - Worker for processing atoms that do not
+ *                                       return an event but do have external
+ *                                       resources
+ * @data:  Work structure
+ */
+static void kbase_event_process_noreport_worker(struct work_struct *data)
+{
+	struct kbase_jd_atom *katom = container_of(data, struct kbase_jd_atom,
+			work);
+	struct kbase_context *kctx = katom->kctx;
+
+	if (katom->core_req & BASE_JD_REQ_EXTERNAL_RESOURCES)
+		kbase_jd_free_external_resources(katom);
+
+	mutex_lock(&kctx->jctx.lock);
+	kbase_event_process(kctx, katom);
+	mutex_unlock(&kctx->jctx.lock);
+}
+
+/**
+ * kbase_event_process_noreport - Process atoms that do not return an event
+ * @kctx:  Context pointer
+ * @katom: Atom to be processed
+ *
+ * Atoms that do not have external resources will be processed immediately.
+ * Atoms that do have external resources will be processed on a workqueue, in
+ * order to avoid locking issues.
+ */
+static void kbase_event_process_noreport(struct kbase_context *kctx,
+		struct kbase_jd_atom *katom)
+{
+	if (katom->core_req & BASE_JD_REQ_EXTERNAL_RESOURCES) {
+		INIT_WORK(&katom->work, kbase_event_process_noreport_worker);
+		queue_work(kctx->event_workq, &katom->work);
+	} else {
+		kbase_event_process(kctx, katom);
+	}
+}
+
+/**
+ * kbase_event_coalesce - Move pending events to the main event list
+ * @kctx:  Context pointer
+ *
+ * kctx->event_list and kctx->event_coalesce_count must be protected
+ * by a lock unless this is the last thread using them
+ * (and we're about to terminate the lock).
+ *
+ * Return: The number of pending events moved to the main event list
+ */
+static int kbase_event_coalesce(struct kbase_context *kctx)
+{
+	const int event_count = kctx->event_coalesce_count;
+
+	/* Join the list of pending events onto the tail of the main list
+	   and reset it */
+	list_splice_tail_init(&kctx->event_coalesce_list, &kctx->event_list);
+	kctx->event_coalesce_count = 0;
+
+	/* Return the number of events moved */
+	return event_count;
+}
+
+void kbase_event_post(struct kbase_context *ctx, struct kbase_jd_atom *atom)
+{
+	if (atom->core_req & BASE_JD_REQ_EVENT_ONLY_ON_FAILURE) {
+		if (atom->event_code == BASE_JD_EVENT_DONE) {
+			/* Don't report the event */
+			kbase_event_process_noreport(ctx, atom);
+			return;
+		}
+	}
+
+	if (atom->core_req & BASEP_JD_REQ_EVENT_NEVER) {
+		/* Don't report the event */
+		kbase_event_process_noreport(ctx, atom);
+		return;
+	}
+	KBASE_TLSTREAM_TL_ATTRIB_ATOM_STATE(atom, TL_ATOM_STATE_POSTED);
+	if (atom->core_req & BASE_JD_REQ_EVENT_COALESCE) {
+		/* Don't report the event until other event(s) have completed */
+		mutex_lock(&ctx->event_mutex);
+		list_add_tail(&atom->dep_item[0], &ctx->event_coalesce_list);
+		++ctx->event_coalesce_count;
+		mutex_unlock(&ctx->event_mutex);
+	} else {
+		/* Report the event and any pending events now */
+		int event_count = 1;
+
+		mutex_lock(&ctx->event_mutex);
+		event_count += kbase_event_coalesce(ctx);
+		list_add_tail(&atom->dep_item[0], &ctx->event_list);
+		atomic_add(event_count, &ctx->event_count);
+		mutex_unlock(&ctx->event_mutex);
+
+		kbase_event_wakeup(ctx);
+	}
+}
+KBASE_EXPORT_TEST_API(kbase_event_post);
+
+void kbase_event_close(struct kbase_context *kctx)
+{
+	mutex_lock(&kctx->event_mutex);
+	atomic_set(&kctx->event_closed, true);
+	mutex_unlock(&kctx->event_mutex);
+	kbase_event_wakeup(kctx);
+}
+
+int kbase_event_init(struct kbase_context *kctx)
+{
+	KBASE_DEBUG_ASSERT(kctx);
+
+	INIT_LIST_HEAD(&kctx->event_list);
+	INIT_LIST_HEAD(&kctx->event_coalesce_list);
+	mutex_init(&kctx->event_mutex);
+	atomic_set(&kctx->event_count, 0);
+	kctx->event_coalesce_count = 0;
+	atomic_set(&kctx->event_closed, false);
+	kctx->event_workq = alloc_workqueue("kbase_event", WQ_MEM_RECLAIM, 1);
+
+	if (NULL == kctx->event_workq)
+		return -EINVAL;
+
+	return 0;
+}
+
+KBASE_EXPORT_TEST_API(kbase_event_init);
+
+void kbase_event_cleanup(struct kbase_context *kctx)
+{
+	int event_count;
+
+	KBASE_DEBUG_ASSERT(kctx);
+	KBASE_DEBUG_ASSERT(kctx->event_workq);
+
+	flush_workqueue(kctx->event_workq);
+	destroy_workqueue(kctx->event_workq);
+
+	/* We use kbase_event_dequeue to remove the remaining events as that
+	 * deals with all the cleanup needed for the atoms.
+	 *
+	 * Note: use of kctx->event_list without a lock is safe because this must be the last
+	 * thread using it (because we're about to terminate the lock)
+	 */
+	event_count = kbase_event_coalesce(kctx);
+	atomic_add(event_count, &kctx->event_count);
+
+	while (!list_empty(&kctx->event_list)) {
+		struct base_jd_event_v2 event;
+
+		kbase_event_dequeue(kctx, &event);
+	}
+}
+
+KBASE_EXPORT_TEST_API(kbase_event_cleanup);