[Intel-gfx] [PATCH v2 09/38] drm/i915: Mock infrastructure for request emission
Chris Wilson
chris at chris-wilson.co.uk
Thu Jan 19 11:41:29 UTC 2017
Create a fake engine that runs requests using a timer to simulate hw.
v2: Prevent leaks of ctx->name along error paths
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
drivers/gpu/drm/i915/i915_gem_context.c | 4 +
drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c | 11 +-
drivers/gpu/drm/i915/selftests/mock_context.c | 78 ++++++++++
drivers/gpu/drm/i915/selftests/mock_context.h | 34 ++++
drivers/gpu/drm/i915/selftests/mock_engine.c | 172 +++++++++++++++++++--
drivers/gpu/drm/i915/selftests/mock_engine.h | 18 ++-
drivers/gpu/drm/i915/selftests/mock_gem_device.c | 95 +++++++++++-
drivers/gpu/drm/i915/selftests/mock_gem_device.h | 1 +
drivers/gpu/drm/i915/selftests/mock_request.c | 44 ++++++
drivers/gpu/drm/i915/selftests/mock_request.h | 44 ++++++
10 files changed, 483 insertions(+), 18 deletions(-)
create mode 100644 drivers/gpu/drm/i915/selftests/mock_context.c
create mode 100644 drivers/gpu/drm/i915/selftests/mock_context.h
create mode 100644 drivers/gpu/drm/i915/selftests/mock_request.c
create mode 100644 drivers/gpu/drm/i915/selftests/mock_request.h
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 17f90c618208..5dc596a86ab1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -1164,3 +1164,7 @@ int i915_gem_context_reset_stats_ioctl(struct drm_device *dev,
return 0;
}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftests/mock_context.c"
+#endif
diff --git a/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c b/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
index fe45c4c7c757..a023b8472d25 100644
--- a/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/selftests/intel_breadcrumbs.c
@@ -25,6 +25,7 @@
#include "i915_random.h"
#include "i915_selftest.h"
+#include "mock_gem_device.h"
#include "mock_engine.h"
static int check_rbtree(struct intel_engine_cs *engine,
@@ -440,15 +441,15 @@ int intel_breadcrumbs_mock_selftests(void)
SUBTEST(igt_insert_complete),
SUBTEST(igt_wakeup),
};
- struct intel_engine_cs *engine;
+ struct drm_i915_private *i915;
int err;
- engine = mock_engine("mock");
- if (!engine)
+ i915 = mock_gem_device();
+ if (!i915)
return -ENOMEM;
- err = i915_subtests(tests, engine);
- kfree(engine);
+ err = i915_subtests(tests, i915->engine[RCS]);
+ drm_dev_unref(&i915->drm);
return err;
}
diff --git a/drivers/gpu/drm/i915/selftests/mock_context.c b/drivers/gpu/drm/i915/selftests/mock_context.c
new file mode 100644
index 000000000000..8d3a90c3f8ac
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_context.c
@@ -0,0 +1,78 @@
+/*
+ * 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_context.h"
+#include "mock_gtt.h"
+
+struct i915_gem_context *
+mock_context(struct drm_i915_private *i915,
+ const char *name)
+{
+ struct i915_gem_context *ctx;
+ int ret;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
+
+ kref_init(&ctx->ref);
+ INIT_LIST_HEAD(&ctx->link);
+ ctx->i915 = i915;
+
+ ret = ida_simple_get(&i915->context_hw_ida,
+ 0, MAX_CONTEXT_HW_ID, GFP_KERNEL);
+ if (ret < 0)
+ goto err_free;
+ ctx->hw_id = ret;
+
+ if (name) {
+ ctx->name = kstrdup(name, GFP_KERNEL);
+ if (!ctx->name)
+ goto err_put;
+
+ ctx->ppgtt = mock_ppgtt(i915, name);
+ if (!ctx->ppgtt)
+ goto err_put;
+ }
+
+ return ctx;
+
+err_free:
+ kfree(ctx);
+ return NULL;
+
+err_put:
+ i915_gem_context_set_closed(ctx);
+ i915_gem_context_put(ctx);
+ return NULL;
+}
+
+void mock_context_close(struct i915_gem_context *ctx)
+{
+ i915_gem_context_set_closed(ctx);
+
+ i915_ppgtt_close(&ctx->ppgtt->base);
+
+ i915_gem_context_put(ctx);
+}
diff --git a/drivers/gpu/drm/i915/selftests/mock_context.h b/drivers/gpu/drm/i915/selftests/mock_context.h
new file mode 100644
index 000000000000..2427e5c0916a
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_context.h
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef __MOCK_CONTEXT_H
+#define __MOCK_CONTEXT_H
+
+struct i915_gem_context *
+mock_context(struct drm_i915_private *i915,
+ const char *name);
+
+void mock_context_close(struct i915_gem_context *ctx);
+
+#endif /* !__MOCK_CONTEXT_H */
diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.c b/drivers/gpu/drm/i915/selftests/mock_engine.c
index 4a090bbe807b..8d5ba037064c 100644
--- a/drivers/gpu/drm/i915/selftests/mock_engine.c
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.c
@@ -23,33 +23,185 @@
*/
#include "mock_engine.h"
+#include "mock_request.h"
-struct intel_engine_cs *mock_engine(const char *name)
+static struct mock_request *first_request(struct mock_engine *engine)
{
- struct intel_engine_cs *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);
+ ring->last_retired_head = -1;
+ 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;
- /* minimal engine setup for seqno */
- engine->name = name;
- engine->id = id++;
- engine->status_page.page_addr = (void *)(engine + 1);
+ engine->base.buffer = mock_ring(&engine->base);
+ if (!engine->base.buffer) {
+ kfree(engine);
+ return NULL;
+ }
- /* minimal breadcrumbs init */
- spin_lock_init(&engine->breadcrumbs.lock);
- engine->breadcrumbs.mock = true;
+ /* 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);
- return engine;
+ 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);
+}
diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.h b/drivers/gpu/drm/i915/selftests/mock_engine.h
index 9cfe9671f860..d080d0a10a4f 100644
--- a/drivers/gpu/drm/i915/selftests/mock_engine.h
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.h
@@ -25,9 +25,25 @@
#ifndef __MOCK_ENGINE_H__
#define __MOCK_ENGINE_H__
-struct intel_engine_cs *mock_engine(const char *name);
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+
+#include "intel_ringbuffer.h"
+
+struct mock_engine {
+ struct intel_engine_cs base;
+
+ spinlock_t hw_lock;
+ struct list_head hw_queue;
+ struct timer_list hw_delay;
+};
+
+struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
+ const char *name);
void mock_engine_flush(struct intel_engine_cs *engine);
void mock_engine_reset(struct intel_engine_cs *engine);
+void mock_engine_free(struct intel_engine_cs *engine);
static inline void mock_seqno_advance(struct intel_engine_cs *engine, u32 seqno)
{
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 73fefa78a2cf..ee1caa7a8079 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -24,14 +24,46 @@
#include <linux/pm_runtime.h>
+#include "mock_engine.h"
+#include "mock_context.h"
+#include "mock_request.h"
#include "mock_gem_device.h"
#include "mock_gem_object.h"
#include "mock_gtt.h"
+void mock_device_flush(struct drm_i915_private *i915)
+{
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ lockdep_assert_held(&i915->drm.struct_mutex);
+
+ for_each_engine(engine, i915, id)
+ mock_engine_flush(engine);
+
+ i915_gem_retire_requests(i915);
+}
+
static void mock_device_release(struct drm_device *dev)
{
struct drm_i915_private *i915 = to_i915(dev);
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ mock_device_flush(i915);
+ mutex_unlock(&i915->drm.struct_mutex);
+ cancel_delayed_work_sync(&i915->gt.retire_work);
+ cancel_delayed_work_sync(&i915->gt.idle_work);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ for_each_engine(engine, i915, id)
+ mock_engine_free(engine);
+ i915_gem_context_fini(i915);
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ drain_workqueue(i915->wq);
i915_gem_drain_freed_objects(i915);
mutex_lock(&i915->drm.struct_mutex);
@@ -39,6 +71,10 @@ static void mock_device_release(struct drm_device *dev)
i915_gem_timeline_fini(&i915->gt.global_timeline);
mutex_unlock(&i915->drm.struct_mutex);
+ destroy_workqueue(i915->wq);
+
+ kmem_cache_destroy(i915->dependencies);
+ kmem_cache_destroy(i915->requests);
kmem_cache_destroy(i915->vmas);
kmem_cache_destroy(i915->objects);
put_device(&i915->drm.pdev->dev);
@@ -60,9 +96,19 @@ static void release_dev(struct device *dev)
kfree(pdev);
}
+static void mock_retire_work_handler(struct work_struct *work)
+{
+}
+
+static void mock_idle_work_handler(struct work_struct *work)
+{
+}
+
struct drm_i915_private *mock_gem_device(void)
{
struct drm_i915_private *i915;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
struct pci_dev *pdev;
int err;
@@ -98,36 +144,81 @@ struct drm_i915_private *mock_gem_device(void)
spin_lock_init(&i915->mm.object_stat_lock);
+ init_waitqueue_head(&i915->gpu_error.wait_queue);
+ init_waitqueue_head(&i915->gpu_error.reset_queue);
+
+ i915->wq = alloc_ordered_workqueue("mock", 0);
+ if (!i915->wq)
+ goto put_device;
+
INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);
init_llist_head(&i915->mm.free_list);
INIT_LIST_HEAD(&i915->mm.unbound_list);
INIT_LIST_HEAD(&i915->mm.bound_list);
+ ida_init(&i915->context_hw_ida);
+
+ INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
+ INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);
+
+ i915->gt.awake = true;
+
i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
if (!i915->objects)
- goto put_device;
+ goto err_wq;
i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
if (!i915->vmas)
goto err_objects;
+ i915->requests = KMEM_CACHE(mock_request,
+ SLAB_HWCACHE_ALIGN |
+ SLAB_RECLAIM_ACCOUNT |
+ SLAB_DESTROY_BY_RCU);
+ if (!i915->requests)
+ goto err_vmas;
+
+ i915->dependencies = KMEM_CACHE(i915_dependency,
+ SLAB_HWCACHE_ALIGN |
+ SLAB_RECLAIM_ACCOUNT);
+ if (!i915->dependencies)
+ goto err_requests;
+
mutex_lock(&i915->drm.struct_mutex);
INIT_LIST_HEAD(&i915->gt.timelines);
err = i915_gem_timeline_init__global(i915);
if (err) {
mutex_unlock(&i915->drm.struct_mutex);
- goto err_vmas;
+ goto err_dependencies;
}
mock_init_ggtt(i915);
mutex_unlock(&i915->drm.struct_mutex);
+ mkwrite_device_info(i915)->ring_mask = BIT(0);
+ i915->engine[RCS] = mock_engine(i915, "mock");
+ if (!i915->engine[RCS])
+ goto err_dependencies;
+
+ i915->kernel_context = mock_context(i915, NULL);
+ if (!i915->kernel_context)
+ goto err_engine;
+
return i915;
+err_engine:
+ for_each_engine(engine, i915, id)
+ mock_engine_free(engine);
+err_dependencies:
+ kmem_cache_destroy(i915->dependencies);
+err_requests:
+ kmem_cache_destroy(i915->requests);
err_vmas:
kmem_cache_destroy(i915->vmas);
err_objects:
kmem_cache_destroy(i915->objects);
+err_wq:
+ destroy_workqueue(i915->wq);
put_device:
put_device(&pdev->dev);
free_device:
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.h b/drivers/gpu/drm/i915/selftests/mock_gem_device.h
index 7ff7c848f731..7eceff766957 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.h
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.h
@@ -4,5 +4,6 @@
#include "i915_drv.h"
struct drm_i915_private *mock_gem_device(void);
+void mock_device_flush(struct drm_i915_private *i915);
#endif /* !__MOCK_GEM_DEVICE_H__ */
diff --git a/drivers/gpu/drm/i915/selftests/mock_request.c b/drivers/gpu/drm/i915/selftests/mock_request.c
new file mode 100644
index 000000000000..e23242d1b88a
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_request.c
@@ -0,0 +1,44 @@
+/*
+ * 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_request.h"
+
+struct drm_i915_gem_request *
+mock_request(struct intel_engine_cs *engine,
+ struct i915_gem_context *context,
+ unsigned long delay)
+{
+ struct drm_i915_gem_request *request;
+ struct mock_request *mock;
+
+ /* NB the i915->requests slab cache is enlarged to fit mock_request */
+ request = i915_gem_request_alloc(engine, context);
+ if (!request)
+ return NULL;
+
+ mock = container_of(request, typeof(*mock), base);
+ mock->delay = delay;
+
+ return &mock->base;
+}
diff --git a/drivers/gpu/drm/i915/selftests/mock_request.h b/drivers/gpu/drm/i915/selftests/mock_request.h
new file mode 100644
index 000000000000..9c739125cab5
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/mock_request.h
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef __MOCK_REQUEST__
+#define __MOCK_REQUEST__
+
+#include <linux/list.h>
+
+#include "i915_gem_request.h"
+
+struct mock_request {
+ struct drm_i915_gem_request base;
+
+ struct list_head link;
+ unsigned long delay;
+};
+
+struct drm_i915_gem_request *
+mock_request(struct intel_engine_cs *engine,
+ struct i915_gem_context *context,
+ unsigned long delay);
+
+#endif /* !__MOCK_REQUEST__ */
--
2.11.0
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