linux_dsm_epyc7002/drivers/gpu/drm/i915/selftests/mock_engine.c
Chris Wilson 3ec0af7f22 drm/i915: Supply the engine-id for our mock_engine()
In the original selftest, we didn't care what the engine->id was, just
that it could uniquely identify it. Later though, we started tracking
the mock engines in the fixed size arrays around the drm_i915_private and
so we now require their indices to be correct. This becomes an issue when
using the standalone harness which runs all available tests at module load,
and so we quickly assign an out-of-bounds index to an engine as we
reallocate the mock GEM device between tests. It doesn't show up in
igt/drv_selftest as that runs each subtest individually.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102045
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170809163930.26470-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
2017-08-10 12:18:35 +01:00

208 lines
5.6 KiB
C

/*
* 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 struct intel_ring *
mock_context_pin(struct intel_engine_cs *engine,
struct i915_gem_context *ctx)
{
i915_gem_context_get(ctx);
return engine->buffer;
}
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;
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->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,
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;
engine->base.buffer = mock_ring(&engine->base);
if (!engine->base.buffer) {
kfree(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.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);
}