/*
* 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 "gem/i915_gem_context.h"
#include "i915_drv.h"
#include "intel_context.h"
#include "intel_engine_pm.h"
#include "mock_engine.h"
#include "selftests/mock_request.h"
struct mock_ring {
struct intel_ring base;
struct i915_timeline timeline;
};
static void mock_timeline_pin(struct i915_timeline *tl)
{
tl->pin_count++;
}
static void mock_timeline_unpin(struct i915_timeline *tl)
{
GEM_BUG_ON(!tl->pin_count);
tl->pin_count--;
}
static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
{
const unsigned long sz = PAGE_SIZE / 2;
struct mock_ring *ring;
ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
if (!ring)
return NULL;
if (i915_timeline_init(engine->i915, &ring->timeline, NULL)) {
kfree(ring);
return NULL;
}
kref_init(&ring->base.ref);
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);
}
static struct i915_request *first_request(struct mock_engine *engine)
{
return list_first_entry_or_null(&engine->hw_queue,
struct i915_request,
mock.link);
}
static void advance(struct i915_request *request)
{
list_del_init(&request->mock.link);
i915_request_mark_complete(request);
GEM_BUG_ON(!i915_request_completed(request));
intel_engine_queue_breadcrumbs(request->engine);
}
static void hw_delay_complete(struct timer_list *t)
{
struct mock_engine *engine = from_timer(engine, t, hw_delay);
struct i915_request *request;
unsigned long flags;
spin_lock_irqsave(&engine->hw_lock, flags);
/* Timer fired, first request is complete */
request = first_request(engine);
if (request)
advance(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->mock.delay) {
mod_timer(&engine->hw_delay,
jiffies + request->mock.delay);
break;
}
advance(request);
}
spin_unlock_irqrestore(&engine->hw_lock, flags);
}
static void mock_context_unpin(struct intel_context *ce)
{
mock_timeline_unpin(ce->ring->timeline);
}
static void mock_context_destroy(struct kref *ref)
{
struct intel_context *ce = container_of(ref, typeof(*ce), ref);
GEM_BUG_ON(intel_context_is_pinned(ce));
if (ce->ring)
mock_ring_free(ce->ring);
intel_context_free(ce);
}
static int mock_context_pin(struct intel_context *ce)
{
int ret;
if (!ce->ring) {
ce->ring = mock_ring(ce->engine);
if (!ce->ring)
return -ENOMEM;
}
ret = intel_context_active_acquire(ce, PIN_HIGH);
if (ret)
return ret;
mock_timeline_pin(ce->ring->timeline);
return 0;
}
static const struct intel_context_ops mock_context_ops = {
.pin = mock_context_pin,
.unpin = mock_context_unpin,
.enter = intel_context_enter_engine,
.exit = intel_context_exit_engine,
.destroy = mock_context_destroy,
};
static int mock_request_alloc(struct i915_request *request)
{
INIT_LIST_HEAD(&request->mock.link);
request->mock.delay = 0;
return 0;
}
static int mock_emit_flush(struct i915_request *request,
unsigned int flags)
{
return 0;
}
static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs)
{
return cs;
}
static void mock_submit_request(struct i915_request *request)
{
struct mock_engine *engine =
container_of(request->engine, typeof(*engine), base);
unsigned long flags;
i915_request_submit(request);
spin_lock_irqsave(&engine->hw_lock, flags);
list_add_tail(&request->mock.link, &engine->hw_queue);
if (list_is_first(&request->mock.link, &engine->hw_queue)) {
if (request->mock.delay)
mod_timer(&engine->hw_delay,
jiffies + request->mock.delay);
else
advance(request);
}
spin_unlock_irqrestore(&engine->hw_lock, flags);
}
static void mock_reset_prepare(struct intel_engine_cs *engine)
{
}
static void mock_reset(struct intel_engine_cs *engine, bool stalled)
{
GEM_BUG_ON(stalled);
}
static void mock_reset_finish(struct intel_engine_cs *engine)
{
}
static void mock_cancel_requests(struct intel_engine_cs *engine)
{
struct i915_request *request;
unsigned long flags;
spin_lock_irqsave(&engine->active.lock, flags);
/* Mark all submitted requests as skipped. */
list_for_each_entry(request, &engine->active.requests, sched.link) {
if (!i915_request_signaled(request))
dma_fence_set_error(&request->fence, -EIO);
i915_request_mark_complete(request);
}
spin_unlock_irqrestore(&engine->active.lock, flags);
}
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.mask = BIT(id);
engine->base.status_page.addr = (void *)(engine + 1);
engine->base.cops = &mock_context_ops;
engine->base.request_alloc = mock_request_alloc;
engine->base.emit_flush = mock_emit_flush;
engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb;
engine->base.submit_request = mock_submit_request;
engine->base.reset.prepare = mock_reset_prepare;
engine->base.reset.reset = mock_reset;
engine->base.reset.finish = mock_reset_finish;
engine->base.cancel_requests = mock_cancel_requests;
/* fake hw queue */
spin_lock_init(&engine->hw_lock);
timer_setup(&engine->hw_delay, hw_delay_complete, 0);
INIT_LIST_HEAD(&engine->hw_queue);
return &engine->base;
}
int mock_engine_init(struct intel_engine_cs *engine)
{
struct drm_i915_private *i915 = engine->i915;
int err;
intel_engine_init_active(engine, ENGINE_MOCK);
intel_engine_init_breadcrumbs(engine);
intel_engine_init_execlists(engine);
intel_engine_init__pm(engine);
engine->kernel_context =
i915_gem_context_get_engine(i915->kernel_context, engine->id);
if (IS_ERR(engine->kernel_context))
goto err_breadcrumbs;
err = intel_context_pin(engine->kernel_context);
intel_context_put(engine->kernel_context);
if (err)
goto err_breadcrumbs;
return 0;
err_breadcrumbs:
intel_engine_fini_breadcrumbs(engine);
return -ENOMEM;
}
void mock_engine_flush(struct intel_engine_cs *engine)
{
struct mock_engine *mock =
container_of(engine, typeof(*mock), base);
struct i915_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, mock.link)
advance(request);
spin_unlock_irq(&mock->hw_lock);
}
void mock_engine_reset(struct intel_engine_cs *engine)
{
}
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));
intel_context_unpin(engine->kernel_context);
intel_engine_fini_breadcrumbs(engine);
kfree(engine);
}
