Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 272 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.c b/drivers/gpu/drm/i915/selftests/mock_engine.c
new file mode 100644
index 000000000..22a73da45
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "mock_engine.h"
+#include "mock_request.h"
+
+struct mock_ring {
+	struct intel_ring base;
+	struct i915_timeline timeline;
+};
+
+static struct mock_request *first_request(struct mock_engine *engine)
+{
+	return list_first_entry_or_null(&engine->hw_queue,
+					struct mock_request,
+					link);
+}
+
+static void advance(struct mock_engine *engine,
+		    struct mock_request *request)
+{
+	list_del_init(&request->link);
+	mock_seqno_advance(&engine->base, request->base.global_seqno);
+}
+
+static void hw_delay_complete(struct timer_list *t)
+{
+	struct mock_engine *engine = from_timer(engine, t, hw_delay);
+	struct mock_request *request;
+
+	spin_lock(&engine->hw_lock);
+
+	/* Timer fired, first request is complete */
+	request = first_request(engine);
+	if (request)
+		advance(engine, request);
+
+	/*
+	 * Also immediately signal any subsequent 0-delay requests, but
+	 * requeue the timer for the next delayed request.
+	 */
+	while ((request = first_request(engine))) {
+		if (request->delay) {
+			mod_timer(&engine->hw_delay, jiffies + request->delay);
+			break;
+		}
+
+		advance(engine, request);
+	}
+
+	spin_unlock(&engine->hw_lock);
+}
+
+static void mock_context_unpin(struct intel_context *ce)
+{
+	i915_gem_context_put(ce->gem_context);
+}
+
+static void mock_context_destroy(struct intel_context *ce)
+{
+	GEM_BUG_ON(ce->pin_count);
+}
+
+static const struct intel_context_ops mock_context_ops = {
+	.unpin = mock_context_unpin,
+	.destroy = mock_context_destroy,
+};
+
+static struct intel_context *
+mock_context_pin(struct intel_engine_cs *engine,
+		 struct i915_gem_context *ctx)
+{
+	struct intel_context *ce = to_intel_context(ctx, engine);
+
+	if (!ce->pin_count++) {
+		i915_gem_context_get(ctx);
+		ce->ring = engine->buffer;
+		ce->ops = &mock_context_ops;
+	}
+
+	return ce;
+}
+
+static int mock_request_alloc(struct i915_request *request)
+{
+	struct mock_request *mock = container_of(request, typeof(*mock), base);
+
+	INIT_LIST_HEAD(&mock->link);
+	mock->delay = 0;
+
+	return 0;
+}
+
+static int mock_emit_flush(struct i915_request *request,
+			   unsigned int flags)
+{
+	return 0;
+}
+
+static void mock_emit_breadcrumb(struct i915_request *request,
+				 u32 *flags)
+{
+}
+
+static void mock_submit_request(struct i915_request *request)
+{
+	struct mock_request *mock = container_of(request, typeof(*mock), base);
+	struct mock_engine *engine =
+		container_of(request->engine, typeof(*engine), base);
+
+	i915_request_submit(request);
+	GEM_BUG_ON(!request->global_seqno);
+
+	spin_lock_irq(&engine->hw_lock);
+	list_add_tail(&mock->link, &engine->hw_queue);
+	if (mock->link.prev == &engine->hw_queue) {
+		if (mock->delay)
+			mod_timer(&engine->hw_delay, jiffies + mock->delay);
+		else
+			advance(engine, mock);
+	}
+	spin_unlock_irq(&engine->hw_lock);
+}
+
+static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
+{
+	const unsigned long sz = PAGE_SIZE / 2;
+	struct mock_ring *ring;
+
+	BUILD_BUG_ON(MIN_SPACE_FOR_ADD_REQUEST > sz);
+
+	ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
+	if (!ring)
+		return NULL;
+
+	i915_timeline_init(engine->i915, &ring->timeline, engine->name);
+
+	ring->base.size = sz;
+	ring->base.effective_size = sz;
+	ring->base.vaddr = (void *)(ring + 1);
+	ring->base.timeline = &ring->timeline;
+
+	INIT_LIST_HEAD(&ring->base.request_list);
+	intel_ring_update_space(&ring->base);
+
+	return &ring->base;
+}
+
+static void mock_ring_free(struct intel_ring *base)
+{
+	struct mock_ring *ring = container_of(base, typeof(*ring), base);
+
+	i915_timeline_fini(&ring->timeline);
+	kfree(ring);
+}
+
+struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
+				    const char *name,
+				    int id)
+{
+	struct mock_engine *engine;
+
+	GEM_BUG_ON(id >= I915_NUM_ENGINES);
+
+	engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
+	if (!engine)
+		return NULL;
+
+	/* minimal engine setup for requests */
+	engine->base.i915 = i915;
+	snprintf(engine->base.name, sizeof(engine->base.name), "%s", name);
+	engine->base.id = id;
+	engine->base.status_page.page_addr = (void *)(engine + 1);
+
+	engine->base.context_pin = mock_context_pin;
+	engine->base.request_alloc = mock_request_alloc;
+	engine->base.emit_flush = mock_emit_flush;
+	engine->base.emit_breadcrumb = mock_emit_breadcrumb;
+	engine->base.submit_request = mock_submit_request;
+
+	i915_timeline_init(i915, &engine->base.timeline, engine->base.name);
+	lockdep_set_subclass(&engine->base.timeline.lock, TIMELINE_ENGINE);
+
+	intel_engine_init_breadcrumbs(&engine->base);
+	engine->base.breadcrumbs.mock = true; /* prevent touching HW for irqs */
+
+	/* fake hw queue */
+	spin_lock_init(&engine->hw_lock);
+	timer_setup(&engine->hw_delay, hw_delay_complete, 0);
+	INIT_LIST_HEAD(&engine->hw_queue);
+
+	engine->base.buffer = mock_ring(&engine->base);
+	if (!engine->base.buffer)
+		goto err_breadcrumbs;
+
+	if (IS_ERR(intel_context_pin(i915->kernel_context, &engine->base)))
+		goto err_ring;
+
+	return &engine->base;
+
+err_ring:
+	mock_ring_free(engine->base.buffer);
+err_breadcrumbs:
+	intel_engine_fini_breadcrumbs(&engine->base);
+	i915_timeline_fini(&engine->base.timeline);
+	kfree(engine);
+	return NULL;
+}
+
+void mock_engine_flush(struct intel_engine_cs *engine)
+{
+	struct mock_engine *mock =
+		container_of(engine, typeof(*mock), base);
+	struct mock_request *request, *rn;
+
+	del_timer_sync(&mock->hw_delay);
+
+	spin_lock_irq(&mock->hw_lock);
+	list_for_each_entry_safe(request, rn, &mock->hw_queue, link) {
+		list_del_init(&request->link);
+		mock_seqno_advance(&mock->base, request->base.global_seqno);
+	}
+	spin_unlock_irq(&mock->hw_lock);
+}
+
+void mock_engine_reset(struct intel_engine_cs *engine)
+{
+	intel_write_status_page(engine, I915_GEM_HWS_INDEX, 0);
+}
+
+void mock_engine_free(struct intel_engine_cs *engine)
+{
+	struct mock_engine *mock =
+		container_of(engine, typeof(*mock), base);
+	struct intel_context *ce;
+
+	GEM_BUG_ON(timer_pending(&mock->hw_delay));
+
+	ce = fetch_and_zero(&engine->last_retired_context);
+	if (ce)
+		intel_context_unpin(ce);
+
+	__intel_context_unpin(engine->i915->kernel_context, engine);
+
+	mock_ring_free(engine->buffer);
+
+	intel_engine_fini_breadcrumbs(engine);
+	i915_timeline_fini(&engine->timeline);
+
+	kfree(engine);
+}