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Diffstat (limited to 'drivers/gpu/drm/i915/selftests/mock_engine.c')
-rw-r--r--drivers/gpu/drm/i915/selftests/mock_engine.c206
1 files changed, 206 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 000000000000..0ad624a1db90
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.c
@@ -0,0 +1,206 @@
+/*
+ * 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"
+
+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 hw_delay_complete(unsigned long data)
+{
+ struct mock_engine *engine = (typeof(engine))data;
+ struct mock_request *request;
+
+ spin_lock(&engine->hw_lock);
+
+ request = first_request(engine);
+ if (request) {
+ list_del_init(&request->link);
+ mock_seqno_advance(&engine->base, request->base.global_seqno);
+ }
+
+ request = first_request(engine);
+ if (request)
+ mod_timer(&engine->hw_delay, jiffies + request->delay);
+
+ spin_unlock(&engine->hw_lock);
+}
+
+static int mock_context_pin(struct intel_engine_cs *engine,
+ struct i915_gem_context *ctx)
+{
+ i915_gem_context_get(ctx);
+ return 0;
+}
+
+static void mock_context_unpin(struct intel_engine_cs *engine,
+ struct i915_gem_context *ctx)
+{
+ i915_gem_context_put(ctx);
+}
+
+static int mock_request_alloc(struct drm_i915_gem_request *request)
+{
+ struct mock_request *mock = container_of(request, typeof(*mock), base);
+
+ INIT_LIST_HEAD(&mock->link);
+ mock->delay = 0;
+
+ request->ring = request->engine->buffer;
+ return 0;
+}
+
+static int mock_emit_flush(struct drm_i915_gem_request *request,
+ unsigned int flags)
+{
+ return 0;
+}
+
+static void mock_emit_breadcrumb(struct drm_i915_gem_request *request,
+ u32 *flags)
+{
+}
+
+static void mock_submit_request(struct drm_i915_gem_request *request)
+{
+ struct mock_request *mock = container_of(request, typeof(*mock), base);
+ struct mock_engine *engine =
+ container_of(request->engine, typeof(*engine), base);
+
+ i915_gem_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)
+ mod_timer(&engine->hw_delay, jiffies + mock->delay);
+ spin_unlock_irq(&engine->hw_lock);
+}
+
+static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
+{
+ const unsigned long sz = roundup_pow_of_two(sizeof(struct intel_ring));
+ struct intel_ring *ring;
+
+ ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
+ if (!ring)
+ return NULL;
+
+ ring->engine = engine;
+ ring->size = sz;
+ ring->effective_size = sz;
+ ring->vaddr = (void *)(ring + 1);
+
+ INIT_LIST_HEAD(&ring->request_list);
+ intel_ring_update_space(ring);
+
+ return ring;
+}
+
+struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
+ const char *name)
+{
+ struct mock_engine *engine;
+ static int id;
+
+ engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
+ if (!engine)
+ return NULL;
+
+ engine->base.buffer = mock_ring(&engine->base);
+ if (!engine->base.buffer) {
+ kfree(engine);
+ return NULL;
+ }
+
+ /* minimal engine setup for requests */
+ engine->base.i915 = i915;
+ engine->base.name = name;
+ engine->base.id = id++;
+ engine->base.status_page.page_addr = (void *)(engine + 1);
+
+ engine->base.context_pin = mock_context_pin;
+ engine->base.context_unpin = mock_context_unpin;
+ 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;
+
+ engine->base.timeline =
+ &i915->gt.global_timeline.engine[engine->base.id];
+
+ 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);
+ setup_timer(&engine->hw_delay,
+ hw_delay_complete,
+ (unsigned long)engine);
+ INIT_LIST_HEAD(&engine->hw_queue);
+
+ return &engine->base;
+}
+
+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);
+
+ GEM_BUG_ON(timer_pending(&mock->hw_delay));
+
+ if (engine->last_retired_context)
+ engine->context_unpin(engine, engine->last_retired_context);
+
+ intel_engine_fini_breadcrumbs(engine);
+
+ kfree(engine->buffer);
+ kfree(engine);
+}