[Intel-gfx] [PATCH 37/40] drm/i915: Replace engine->timeline with a plain list
Chris Wilson
chris at chris-wilson.co.uk
Wed May 8 08:07:01 UTC 2019
To continue the onslaught of removing the assumption of a global
execution ordering, another casualty is the engine->timeline. Without an
actual timeline to track, it is overkill and we can replace it with a
much less grand plain list. We still need a list of requests inflight,
for the simple purpose of finding inflight requests (for retiring,
resetting, preemption etc).
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine.h | 6 ++
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 62 ++++++------
drivers/gpu/drm/i915/gt/intel_engine_types.h | 6 +-
drivers/gpu/drm/i915/gt/intel_lrc.c | 95 ++++++++++---------
drivers/gpu/drm/i915/gt/intel_reset.c | 10 +-
drivers/gpu/drm/i915/gt/intel_ringbuffer.c | 15 ++-
drivers/gpu/drm/i915/gt/mock_engine.c | 18 ++--
drivers/gpu/drm/i915/i915_gpu_error.c | 5 +-
drivers/gpu/drm/i915/i915_request.c | 43 +++------
drivers/gpu/drm/i915/i915_request.h | 2 +-
drivers/gpu/drm/i915/i915_scheduler.c | 36 +++----
drivers/gpu/drm/i915/i915_timeline.c | 1 -
drivers/gpu/drm/i915/i915_timeline.h | 19 ----
drivers/gpu/drm/i915/i915_timeline_types.h | 4 -
drivers/gpu/drm/i915/intel_guc_submission.c | 16 ++--
.../gpu/drm/i915/selftests/mock_timeline.c | 1 -
16 files changed, 152 insertions(+), 187 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 1ae2934b7ecc..b8f5c4e1d39e 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -544,4 +544,10 @@ static inline bool inject_preempt_hang(struct intel_engine_execlists *execlists)
#endif
+void intel_engine_init_active(struct intel_engine_cs *engine,
+ unsigned int subclass);
+#define ENGINE_PHYSICAL 0
+#define ENGINE_MOCK 1
+#define ENGINE_VIRTUAL 2
+
#endif /* _INTEL_RINGBUFFER_H_ */
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 794aa8b11742..f2e28510433b 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -567,14 +567,7 @@ static int intel_engine_setup_common(struct intel_engine_cs *engine)
if (err)
return err;
- err = i915_timeline_init(engine->i915,
- &engine->timeline,
- engine->status_page.vma);
- if (err)
- goto err_hwsp;
-
- i915_timeline_set_subclass(&engine->timeline, TIMELINE_ENGINE);
-
+ intel_engine_init_active(engine, ENGINE_PHYSICAL);
intel_engine_init_breadcrumbs(engine);
intel_engine_init_execlists(engine);
intel_engine_init_hangcheck(engine);
@@ -587,10 +580,6 @@ static int intel_engine_setup_common(struct intel_engine_cs *engine)
intel_sseu_from_device_info(&RUNTIME_INFO(engine->i915)->sseu);
return 0;
-
-err_hwsp:
- cleanup_status_page(engine);
- return err;
}
/**
@@ -747,6 +736,27 @@ static int pin_context(struct i915_gem_context *ctx,
return 0;
}
+void
+intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass)
+{
+ INIT_LIST_HEAD(&engine->active.requests);
+
+ spin_lock_init(&engine->active.lock);
+ lockdep_set_subclass(&engine->active.lock, subclass);
+
+ /*
+ * Due to an interesting quirk in lockdep's internal debug tracking,
+ * after setting a subclass we must ensure the lock is used. Otherwise,
+ * nr_unused_locks is incremented once too often.
+ */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ local_irq_disable();
+ lock_map_acquire(&engine->active.lock.dep_map);
+ lock_map_release(&engine->active.lock.dep_map);
+ local_irq_enable();
+#endif
+}
+
/**
* intel_engines_init_common - initialize cengine state which might require hw access
* @engine: Engine to initialize.
@@ -810,6 +820,8 @@ int intel_engine_init_common(struct intel_engine_cs *engine)
*/
void intel_engine_cleanup_common(struct intel_engine_cs *engine)
{
+ GEM_BUG_ON(!list_empty(&engine->active.requests));
+
cleanup_status_page(engine);
intel_engine_fini_breadcrumbs(engine);
@@ -824,8 +836,6 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine)
intel_context_unpin(engine->kernel_context);
GEM_BUG_ON(!llist_empty(&engine->barrier_tasks));
- i915_timeline_fini(&engine->timeline);
-
intel_wa_list_free(&engine->ctx_wa_list);
intel_wa_list_free(&engine->wa_list);
intel_wa_list_free(&engine->whitelist);
@@ -1431,16 +1441,6 @@ void intel_engine_dump(struct intel_engine_cs *engine,
drm_printf(m, "\tRequests:\n");
- rq = list_first_entry(&engine->timeline.requests,
- struct i915_request, link);
- if (&rq->link != &engine->timeline.requests)
- print_request(m, rq, "\t\tfirst ");
-
- rq = list_last_entry(&engine->timeline.requests,
- struct i915_request, link);
- if (&rq->link != &engine->timeline.requests)
- print_request(m, rq, "\t\tlast ");
-
rq = intel_engine_find_active_request(engine);
if (rq) {
print_request(m, rq, "\t\tactive ");
@@ -1521,7 +1521,7 @@ int intel_enable_engine_stats(struct intel_engine_cs *engine)
if (!intel_engine_supports_stats(engine))
return -ENODEV;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
write_seqlock(&engine->stats.lock);
if (unlikely(engine->stats.enabled == ~0)) {
@@ -1547,7 +1547,7 @@ int intel_enable_engine_stats(struct intel_engine_cs *engine)
unlock:
write_sequnlock(&engine->stats.lock);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
return err;
}
@@ -1632,22 +1632,22 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
* At all other times, we must assume the GPU is still running, but
* we only care about the snapshot of this moment.
*/
- spin_lock_irqsave(&engine->timeline.lock, flags);
- list_for_each_entry(request, &engine->timeline.requests, link) {
+ spin_lock_irqsave(&engine->active.lock, flags);
+ list_for_each_entry(request, &engine->active.requests, sched.link) {
if (i915_request_completed(request))
continue;
if (!i915_request_started(request))
- break;
+ continue;
/* More than one preemptible request may match! */
if (!match_ring(request))
- break;
+ continue;
active = request;
break;
}
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
return active;
}
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index d3d5a505f621..e00443f53b59 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -286,7 +286,11 @@ struct intel_engine_cs {
struct intel_ring *buffer;
- struct i915_timeline timeline;
+ struct {
+ spinlock_t lock;
+ struct list_head requests;
+ } active;
+
struct llist_head barrier_tasks;
struct intel_context *kernel_context; /* pinned */
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index bc135a9e6d42..d350ceadffc5 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -311,8 +311,8 @@ static inline bool need_preempt(const struct intel_engine_cs *engine,
* Check against the first request in ELSP[1], it will, thanks to the
* power of PI, be the highest priority of that context.
*/
- if (!list_is_last(&rq->link, &engine->timeline.requests) &&
- rq_prio(list_next_entry(rq, link)) > last_prio)
+ if (!list_is_last(&rq->sched.link, &engine->active.requests) &&
+ rq_prio(list_next_entry(rq, sched.link)) > last_prio)
return true;
if (rb) {
@@ -447,11 +447,11 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine, int boost)
struct list_head *uninitialized_var(pl);
int prio = I915_PRIORITY_INVALID | boost;
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
list_for_each_entry_safe_reverse(rq, rn,
- &engine->timeline.requests,
- link) {
+ &engine->active.requests,
+ sched.link) {
struct intel_engine_cs *owner;
if (i915_request_completed(rq))
@@ -478,7 +478,7 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine, int boost)
}
GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
- list_add(&rq->sched.link, pl);
+ list_move(&rq->sched.link, pl);
active = rq;
} else {
if (__i915_request_has_started(rq))
@@ -975,11 +975,11 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
rb_entry(rb, typeof(*ve), nodes[engine->id].rb);
struct i915_request *rq;
- spin_lock(&ve->base.timeline.lock);
+ spin_lock(&ve->base.active.lock);
rq = ve->request;
if (unlikely(!rq)) { /* lost the race to a sibling */
- spin_unlock(&ve->base.timeline.lock);
+ spin_unlock(&ve->base.active.lock);
rb_erase_cached(rb, &execlists->virtual);
RB_CLEAR_NODE(rb);
rb = rb_first_cached(&execlists->virtual);
@@ -992,13 +992,13 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
if (rq_prio(rq) >= queue_prio(execlists)) {
if (!virtual_matches(ve, rq, engine)) {
- spin_unlock(&ve->base.timeline.lock);
+ spin_unlock(&ve->base.active.lock);
rb = rb_next(rb);
continue;
}
if (last && !can_merge_rq(last, rq)) {
- spin_unlock(&ve->base.timeline.lock);
+ spin_unlock(&ve->base.active.lock);
return; /* leave this rq for another engine */
}
@@ -1053,7 +1053,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
last = rq;
}
- spin_unlock(&ve->base.timeline.lock);
+ spin_unlock(&ve->base.active.lock);
break;
}
@@ -1110,8 +1110,6 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
GEM_BUG_ON(port_isset(port));
}
- list_del_init(&rq->sched.link);
-
__i915_request_submit(rq);
trace_i915_request_in(rq, port_index(port, execlists));
@@ -1212,7 +1210,7 @@ static void process_csb(struct intel_engine_cs *engine)
const u8 num_entries = execlists->csb_size;
u8 head, tail;
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
/*
* Note that csb_write, csb_status may be either in HWSP or mmio.
@@ -1372,7 +1370,7 @@ static void process_csb(struct intel_engine_cs *engine)
static void __execlists_submission_tasklet(struct intel_engine_cs *const engine)
{
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
process_csb(engine);
if (!execlists_is_active(&engine->execlists, EXECLISTS_ACTIVE_PREEMPT))
@@ -1393,15 +1391,16 @@ static void execlists_submission_tasklet(unsigned long data)
!!intel_wakeref_active(&engine->wakeref),
engine->execlists.active);
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__execlists_submission_tasklet(engine);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void queue_request(struct intel_engine_cs *engine,
struct i915_sched_node *node,
int prio)
{
+ GEM_BUG_ON(!list_empty(&node->link));
list_add_tail(&node->link, i915_sched_lookup_priolist(engine, prio));
}
@@ -1432,7 +1431,7 @@ static void execlists_submit_request(struct i915_request *request)
unsigned long flags;
/* Will be called from irq-context when using foreign fences. */
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
queue_request(engine, &request->sched, rq_prio(request));
@@ -1441,7 +1440,7 @@ static void execlists_submit_request(struct i915_request *request)
submit_queue(engine, rq_prio(request));
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void __execlists_context_fini(struct intel_context *ce)
@@ -2092,8 +2091,8 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine)
intel_engine_stop_cs(engine);
/* And flush any current direct submission. */
- spin_lock_irqsave(&engine->timeline.lock, flags);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static bool lrc_regs_ok(const struct i915_request *rq)
@@ -2136,11 +2135,11 @@ static void reset_csb_pointers(struct intel_engine_execlists *execlists)
static struct i915_request *active_request(struct i915_request *rq)
{
- const struct list_head * const list = &rq->engine->timeline.requests;
+ const struct list_head * const list = &rq->engine->active.requests;
const struct intel_context * const context = rq->hw_context;
struct i915_request *active = NULL;
- list_for_each_entry_from_reverse(rq, list, link) {
+ list_for_each_entry_from_reverse(rq, list, sched.link) {
if (i915_request_completed(rq))
break;
@@ -2257,11 +2256,11 @@ static void execlists_reset(struct intel_engine_cs *engine, bool stalled)
GEM_TRACE("%s\n", engine->name);
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__execlists_reset(engine, stalled);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void nop_submission_tasklet(unsigned long data)
@@ -2292,12 +2291,12 @@ static void execlists_cancel_requests(struct intel_engine_cs *engine)
* submission's irq state, we also wish to remind ourselves that
* it is irq state.)
*/
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__execlists_reset(engine, true);
/* Mark all executing requests as skipped. */
- list_for_each_entry(rq, &engine->timeline.requests, link) {
+ list_for_each_entry(rq, &engine->active.requests, sched.link) {
if (!i915_request_signaled(rq))
dma_fence_set_error(&rq->fence, -EIO);
@@ -2328,7 +2327,7 @@ static void execlists_cancel_requests(struct intel_engine_cs *engine)
rb_erase_cached(rb, &execlists->virtual);
RB_CLEAR_NODE(rb);
- spin_lock(&ve->base.timeline.lock);
+ spin_lock(&ve->base.active.lock);
if (ve->request) {
ve->request->engine = engine;
__i915_request_submit(ve->request);
@@ -2337,7 +2336,7 @@ static void execlists_cancel_requests(struct intel_engine_cs *engine)
ve->base.execlists.queue_priority_hint = INT_MIN;
ve->request = NULL;
}
- spin_unlock(&ve->base.timeline.lock);
+ spin_unlock(&ve->base.active.lock);
}
/* Remaining _unready_ requests will be nop'ed when submitted */
@@ -2349,7 +2348,7 @@ static void execlists_cancel_requests(struct intel_engine_cs *engine)
GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
execlists->tasklet.func = nop_submission_tasklet;
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void execlists_reset_finish(struct intel_engine_cs *engine)
@@ -3050,12 +3049,18 @@ static int execlists_context_deferred_alloc(struct intel_context *ce,
return ret;
}
+static struct list_head *virtual_queue(struct virtual_engine *ve)
+{
+ return &ve->base.execlists.default_priolist.requests[0];
+}
+
static void virtual_context_destroy(struct kref *kref)
{
struct virtual_engine *ve =
container_of(kref, typeof(*ve), context.ref);
unsigned int n;
+ GEM_BUG_ON(!list_empty(virtual_queue(ve)));
GEM_BUG_ON(ve->request);
GEM_BUG_ON(ve->context.inflight);
@@ -3066,13 +3071,13 @@ static void virtual_context_destroy(struct kref *kref)
if (RB_EMPTY_NODE(node))
continue;
- spin_lock_irq(&sibling->timeline.lock);
+ spin_lock_irq(&sibling->active.lock);
/* Detachment is lazily performed in the execlists tasklet */
if (!RB_EMPTY_NODE(node))
rb_erase_cached(node, &sibling->execlists.virtual);
- spin_unlock_irq(&sibling->timeline.lock);
+ spin_unlock_irq(&sibling->active.lock);
}
GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet));
@@ -3080,8 +3085,6 @@ static void virtual_context_destroy(struct kref *kref)
__execlists_context_fini(&ve->context);
kfree(ve->bonds);
-
- i915_timeline_fini(&ve->base.timeline);
kfree(ve);
}
@@ -3201,16 +3204,16 @@ static void virtual_submission_tasklet(unsigned long data)
if (unlikely(!(mask & sibling->mask))) {
if (!RB_EMPTY_NODE(&node->rb)) {
- spin_lock(&sibling->timeline.lock);
+ spin_lock(&sibling->active.lock);
rb_erase_cached(&node->rb,
&sibling->execlists.virtual);
RB_CLEAR_NODE(&node->rb);
- spin_unlock(&sibling->timeline.lock);
+ spin_unlock(&sibling->active.lock);
}
continue;
}
- spin_lock(&sibling->timeline.lock);
+ spin_lock(&sibling->active.lock);
if (!RB_EMPTY_NODE(&node->rb)) {
/*
@@ -3254,7 +3257,7 @@ static void virtual_submission_tasklet(unsigned long data)
tasklet_hi_schedule(&sibling->execlists.tasklet);
}
- spin_unlock(&sibling->timeline.lock);
+ spin_unlock(&sibling->active.lock);
}
local_irq_enable();
}
@@ -3271,9 +3274,13 @@ static void virtual_submit_request(struct i915_request *rq)
GEM_BUG_ON(ve->base.submit_request != virtual_submit_request);
GEM_BUG_ON(ve->request);
+ GEM_BUG_ON(!list_empty(virtual_queue(ve)));
+
ve->base.execlists.queue_priority_hint = rq_prio(rq);
WRITE_ONCE(ve->request, rq);
+ list_move_tail(&rq->sched.link, virtual_queue(ve));
+
tasklet_schedule(&ve->base.execlists.tasklet);
}
@@ -3337,10 +3344,7 @@ intel_execlists_create_virtual(struct i915_gem_context *ctx,
snprintf(ve->base.name, sizeof(ve->base.name), "virtual");
- err = i915_timeline_init(ctx->i915, &ve->base.timeline, NULL);
- if (err)
- goto err_put;
- i915_timeline_set_subclass(&ve->base.timeline, TIMELINE_VIRTUAL);
+ intel_engine_init_active(&ve->base, ENGINE_VIRTUAL);
intel_engine_init_execlists(&ve->base);
@@ -3351,6 +3355,7 @@ intel_execlists_create_virtual(struct i915_gem_context *ctx,
ve->base.submit_request = virtual_submit_request;
ve->base.bond_execute = virtual_bond_execute;
+ INIT_LIST_HEAD(virtual_queue(ve));
ve->base.execlists.queue_priority_hint = INT_MIN;
tasklet_init(&ve->base.execlists.tasklet,
virtual_submission_tasklet,
@@ -3505,11 +3510,11 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
unsigned int count;
struct rb_node *rb;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
last = NULL;
count = 0;
- list_for_each_entry(rq, &engine->timeline.requests, link) {
+ list_for_each_entry(rq, &engine->active.requests, sched.link) {
if (count++ < max - 1)
show_request(m, rq, "\t\tE ");
else
@@ -3572,7 +3577,7 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
show_request(m, last, "\t\tV ");
}
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
void intel_lr_context_reset(struct intel_engine_cs *engine,
diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index aa605d79fa94..2b0b08096ea5 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -49,12 +49,12 @@ static void engine_skip_context(struct i915_request *rq)
struct intel_engine_cs *engine = rq->engine;
struct i915_gem_context *hung_ctx = rq->gem_context;
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
if (!i915_request_is_active(rq))
return;
- list_for_each_entry_continue(rq, &engine->timeline.requests, link)
+ list_for_each_entry_continue(rq, &engine->active.requests, sched.link)
if (rq->gem_context == hung_ctx)
i915_request_skip(rq, -EIO);
}
@@ -130,7 +130,7 @@ void i915_reset_request(struct i915_request *rq, bool guilty)
rq->fence.seqno,
yesno(guilty));
- lockdep_assert_held(&rq->engine->timeline.lock);
+ lockdep_assert_held(&rq->engine->active.lock);
GEM_BUG_ON(i915_request_completed(rq));
if (guilty) {
@@ -785,10 +785,10 @@ static void nop_submit_request(struct i915_request *request)
engine->name, request->fence.context, request->fence.seqno);
dma_fence_set_error(&request->fence, -EIO);
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__i915_request_submit(request);
i915_request_mark_complete(request);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
intel_engine_queue_breadcrumbs(engine);
}
diff --git a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
index fc596adc637a..93b0893c736b 100644
--- a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
@@ -730,14 +730,13 @@ static void reset_prepare(struct intel_engine_cs *engine)
static void reset_ring(struct intel_engine_cs *engine, bool stalled)
{
- struct i915_timeline *tl = &engine->timeline;
struct i915_request *pos, *rq;
unsigned long flags;
u32 head;
rq = NULL;
- spin_lock_irqsave(&tl->lock, flags);
- list_for_each_entry(pos, &tl->requests, link) {
+ spin_lock_irqsave(&engine->active.lock, flags);
+ list_for_each_entry(pos, &engine->active.requests, sched.link) {
if (!i915_request_completed(pos)) {
rq = pos;
break;
@@ -791,7 +790,7 @@ static void reset_ring(struct intel_engine_cs *engine, bool stalled)
}
engine->buffer->head = intel_ring_wrap(engine->buffer, head);
- spin_unlock_irqrestore(&tl->lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void reset_finish(struct intel_engine_cs *engine)
@@ -877,10 +876,10 @@ static void cancel_requests(struct intel_engine_cs *engine)
struct i915_request *request;
unsigned long flags;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
/* Mark all submitted requests as skipped. */
- list_for_each_entry(request, &engine->timeline.requests, link) {
+ list_for_each_entry(request, &engine->active.requests, sched.link) {
if (!i915_request_signaled(request))
dma_fence_set_error(&request->fence, -EIO);
@@ -889,7 +888,7 @@ static void cancel_requests(struct intel_engine_cs *engine)
/* Remaining _unready_ requests will be nop'ed when submitted */
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void i9xx_submit_request(struct i915_request *request)
@@ -1267,8 +1266,6 @@ intel_engine_create_ring(struct intel_engine_cs *engine,
GEM_BUG_ON(!is_power_of_2(size));
GEM_BUG_ON(RING_CTL_SIZE(size) & ~RING_NR_PAGES);
- GEM_BUG_ON(timeline == &engine->timeline);
- lockdep_assert_held(&engine->i915->drm.struct_mutex);
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
if (!ring)
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index b7675ef18523..00c666d3e652 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -229,17 +229,17 @@ static void mock_cancel_requests(struct intel_engine_cs *engine)
struct i915_request *request;
unsigned long flags;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
/* Mark all submitted requests as skipped. */
- list_for_each_entry(request, &engine->timeline.requests, sched.link) {
+ 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->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
@@ -285,28 +285,23 @@ 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);
- if (i915_timeline_init(i915, &engine->timeline, NULL))
- goto err_breadcrumbs;
- i915_timeline_set_subclass(&engine->timeline, TIMELINE_ENGINE);
-
engine->kernel_context =
i915_gem_context_get_engine(i915->kernel_context, engine->id);
if (IS_ERR(engine->kernel_context))
- goto err_timeline;
+ goto err_breadcrumbs;
err = intel_context_pin(engine->kernel_context);
intel_context_put(engine->kernel_context);
if (err)
- goto err_timeline;
+ goto err_breadcrumbs;
return 0;
-err_timeline:
- i915_timeline_fini(&engine->timeline);
err_breadcrumbs:
intel_engine_fini_breadcrumbs(engine);
return -ENOMEM;
@@ -340,7 +335,6 @@ void mock_engine_free(struct intel_engine_cs *engine)
intel_context_unpin(engine->kernel_context);
intel_engine_fini_breadcrumbs(engine);
- i915_timeline_fini(&engine->timeline);
kfree(engine);
}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 707811256501..4cc900e432e2 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1269,7 +1269,7 @@ static void engine_record_requests(struct intel_engine_cs *engine,
count = 0;
request = first;
- list_for_each_entry_from(request, &engine->timeline.requests, link)
+ list_for_each_entry_from(request, &engine->active.requests, sched.link)
count++;
if (!count)
return;
@@ -1282,7 +1282,8 @@ static void engine_record_requests(struct intel_engine_cs *engine,
count = 0;
request = first;
- list_for_each_entry_from(request, &engine->timeline.requests, link) {
+ list_for_each_entry_from(request,
+ &engine->active.requests, sched.link) {
if (count >= ee->num_requests) {
/*
* If the ring request list was changed in
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index c6fc0e8c3876..03f15ac63ec9 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -232,9 +232,9 @@ static bool i915_request_retire(struct i915_request *rq)
local_irq_disable();
- spin_lock(&rq->engine->timeline.lock);
- list_del(&rq->link);
- spin_unlock(&rq->engine->timeline.lock);
+ spin_lock(&rq->engine->active.lock);
+ list_del(&rq->sched.link);
+ spin_unlock(&rq->engine->active.lock);
spin_lock(&rq->lock);
i915_request_mark_complete(rq);
@@ -254,6 +254,7 @@ static bool i915_request_retire(struct i915_request *rq)
intel_context_unpin(rq->hw_context);
i915_request_remove_from_client(rq);
+ list_del(&rq->link);
free_capture_list(rq);
i915_sched_node_fini(&rq->sched);
@@ -373,28 +374,17 @@ __i915_request_await_execution(struct i915_request *rq,
return 0;
}
-static void move_to_timeline(struct i915_request *request,
- struct i915_timeline *timeline)
-{
- GEM_BUG_ON(request->timeline == &request->engine->timeline);
- lockdep_assert_held(&request->engine->timeline.lock);
-
- spin_lock(&request->timeline->lock);
- list_move_tail(&request->link, &timeline->requests);
- spin_unlock(&request->timeline->lock);
-}
-
void __i915_request_submit(struct i915_request *request)
{
struct intel_engine_cs *engine = request->engine;
- GEM_TRACE("%s fence %llx:%lld -> current %d\n",
+ GEM_TRACE("%s fence %llx:%lld, current %d\n",
engine->name,
request->fence.context, request->fence.seqno,
hwsp_seqno(request));
GEM_BUG_ON(!irqs_disabled());
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
if (i915_gem_context_is_banned(request->gem_context))
i915_request_skip(request, -EIO);
@@ -422,6 +412,8 @@ void __i915_request_submit(struct i915_request *request)
/* We may be recursing from the signal callback of another i915 fence */
spin_lock_nested(&request->lock, SINGLE_DEPTH_NESTING);
+ list_move_tail(&request->sched.link, &engine->active.requests);
+
GEM_BUG_ON(test_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags));
set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags);
@@ -437,9 +429,6 @@ void __i915_request_submit(struct i915_request *request)
engine->emit_fini_breadcrumb(request,
request->ring->vaddr + request->postfix);
- /* Transfer from per-context onto the global per-engine timeline */
- move_to_timeline(request, &engine->timeline);
-
engine->serial++;
trace_i915_request_execute(request);
@@ -451,11 +440,11 @@ void i915_request_submit(struct i915_request *request)
unsigned long flags;
/* Will be called from irq-context when using foreign fences. */
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__i915_request_submit(request);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
void __i915_request_unsubmit(struct i915_request *request)
@@ -468,7 +457,7 @@ void __i915_request_unsubmit(struct i915_request *request)
hwsp_seqno(request));
GEM_BUG_ON(!irqs_disabled());
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
/*
* Only unwind in reverse order, required so that the per-context list
@@ -486,9 +475,6 @@ void __i915_request_unsubmit(struct i915_request *request)
spin_unlock(&request->lock);
- /* Transfer back from the global per-engine timeline to per-context */
- move_to_timeline(request, request->timeline);
-
/*
* We don't need to wake_up any waiters on request->execute, they
* will get woken by any other event or us re-adding this request
@@ -504,11 +490,11 @@ void i915_request_unsubmit(struct i915_request *request)
unsigned long flags;
/* Will be called from irq-context when using foreign fences. */
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
__i915_request_unsubmit(request);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static int __i915_sw_fence_call
@@ -674,7 +660,6 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp)
rq->engine = ce->engine;
rq->ring = ce->ring;
rq->timeline = tl;
- GEM_BUG_ON(rq->timeline == &ce->engine->timeline);
rq->hwsp_seqno = tl->hwsp_seqno;
rq->hwsp_cacheline = tl->hwsp_cacheline;
rq->rcustate = get_state_synchronize_rcu(); /* acts as smp_mb() */
@@ -1135,9 +1120,7 @@ __i915_request_add_to_timeline(struct i915_request *rq)
0);
}
- spin_lock_irq(&timeline->lock);
list_add_tail(&rq->link, &timeline->requests);
- spin_unlock_irq(&timeline->lock);
/*
* Make sure that no request gazumped us - if it was allocated after
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index c9f7d07991c8..edbbdfec24ab 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -217,7 +217,7 @@ struct i915_request {
bool waitboost;
- /** engine->request_list entry for this request */
+ /** timeline->request entry for this request */
struct list_head link;
/** ring->request_list entry for this request */
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index 78ceb56d7801..2cba5b9b34bb 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -77,7 +77,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
bool first = true;
int idx, i;
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
assert_priolists(execlists);
/* buckets sorted from highest [in slot 0] to lowest priority */
@@ -162,9 +162,9 @@ sched_lock_engine(const struct i915_sched_node *node,
* check that the rq still belongs to the newly locked engine.
*/
while (locked != (engine = READ_ONCE(rq->engine))) {
- spin_unlock(&locked->timeline.lock);
+ spin_unlock(&locked->active.lock);
memset(cache, 0, sizeof(*cache));
- spin_lock(&engine->timeline.lock);
+ spin_lock(&engine->active.lock);
locked = engine;
}
@@ -278,7 +278,7 @@ static void __i915_schedule(struct i915_sched_node *node,
memset(&cache, 0, sizeof(cache));
engine = node_to_request(node)->engine;
- spin_lock(&engine->timeline.lock);
+ spin_lock(&engine->active.lock);
/* Fifo and depth-first replacement ensure our deps execute before us */
engine = sched_lock_engine(node, engine, &cache);
@@ -287,7 +287,7 @@ static void __i915_schedule(struct i915_sched_node *node,
node = dep->signaler;
engine = sched_lock_engine(node, engine, &cache);
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
/* Recheck after acquiring the engine->timeline.lock */
if (prio <= node->attr.priority || node_signaled(node))
@@ -296,14 +296,8 @@ static void __i915_schedule(struct i915_sched_node *node,
GEM_BUG_ON(node_to_request(node)->engine != engine);
node->attr.priority = prio;
- if (!list_empty(&node->link)) {
- GEM_BUG_ON(intel_engine_is_virtual(engine));
- if (!cache.priolist)
- cache.priolist =
- i915_sched_lookup_priolist(engine,
- prio);
- list_move_tail(&node->link, cache.priolist);
- } else {
+
+ if (list_empty(&node->link)) {
/*
* If the request is not in the priolist queue because
* it is not yet runnable, then it doesn't contribute
@@ -312,8 +306,16 @@ static void __i915_schedule(struct i915_sched_node *node,
* queue; but in that case we may still need to reorder
* the inflight requests.
*/
- if (!i915_sw_fence_done(&node_to_request(node)->submit))
- continue;
+ continue;
+ }
+
+ if (!intel_engine_is_virtual(engine) &&
+ !i915_request_is_active(node_to_request(node))) {
+ if (!cache.priolist)
+ cache.priolist =
+ i915_sched_lookup_priolist(engine,
+ prio);
+ list_move_tail(&node->link, cache.priolist);
}
if (prio <= engine->execlists.queue_priority_hint)
@@ -325,7 +327,7 @@ static void __i915_schedule(struct i915_sched_node *node,
kick_submission(engine, prio);
}
- spin_unlock(&engine->timeline.lock);
+ spin_unlock(&engine->active.lock);
}
void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr)
@@ -439,8 +441,6 @@ void i915_sched_node_fini(struct i915_sched_node *node)
{
struct i915_dependency *dep, *tmp;
- GEM_BUG_ON(!list_empty(&node->link));
-
spin_lock_irq(&schedule_lock);
/*
diff --git a/drivers/gpu/drm/i915/i915_timeline.c b/drivers/gpu/drm/i915/i915_timeline.c
index 000e1a9b6750..c311ce9c6f9d 100644
--- a/drivers/gpu/drm/i915/i915_timeline.c
+++ b/drivers/gpu/drm/i915/i915_timeline.c
@@ -251,7 +251,6 @@ int i915_timeline_init(struct drm_i915_private *i915,
timeline->fence_context = dma_fence_context_alloc(1);
- spin_lock_init(&timeline->lock);
mutex_init(&timeline->mutex);
INIT_ACTIVE_REQUEST(&timeline->last_request);
diff --git a/drivers/gpu/drm/i915/i915_timeline.h b/drivers/gpu/drm/i915/i915_timeline.h
index 27668a1a69a3..36e5e5a65155 100644
--- a/drivers/gpu/drm/i915/i915_timeline.h
+++ b/drivers/gpu/drm/i915/i915_timeline.h
@@ -36,25 +36,6 @@ int i915_timeline_init(struct drm_i915_private *i915,
struct i915_vma *hwsp);
void i915_timeline_fini(struct i915_timeline *tl);
-static inline void
-i915_timeline_set_subclass(struct i915_timeline *timeline,
- unsigned int subclass)
-{
- lockdep_set_subclass(&timeline->lock, subclass);
-
- /*
- * Due to an interesting quirk in lockdep's internal debug tracking,
- * after setting a subclass we must ensure the lock is used. Otherwise,
- * nr_unused_locks is incremented once too often.
- */
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
- local_irq_disable();
- lock_map_acquire(&timeline->lock.dep_map);
- lock_map_release(&timeline->lock.dep_map);
- local_irq_enable();
-#endif
-}
-
struct i915_timeline *
i915_timeline_create(struct drm_i915_private *i915,
struct i915_vma *global_hwsp);
diff --git a/drivers/gpu/drm/i915/i915_timeline_types.h b/drivers/gpu/drm/i915/i915_timeline_types.h
index 1688705f4a2b..fce5cb4f1090 100644
--- a/drivers/gpu/drm/i915/i915_timeline_types.h
+++ b/drivers/gpu/drm/i915/i915_timeline_types.h
@@ -23,10 +23,6 @@ struct i915_timeline {
u64 fence_context;
u32 seqno;
- spinlock_t lock;
-#define TIMELINE_CLIENT 0 /* default subclass */
-#define TIMELINE_ENGINE 1
-#define TIMELINE_VIRTUAL 2
struct mutex mutex; /* protects the flow of requests */
unsigned int pin_count;
diff --git a/drivers/gpu/drm/i915/intel_guc_submission.c b/drivers/gpu/drm/i915/intel_guc_submission.c
index 389a9131d413..240c8a2aabc2 100644
--- a/drivers/gpu/drm/i915/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/intel_guc_submission.c
@@ -740,7 +740,7 @@ static bool __guc_dequeue(struct intel_engine_cs *engine)
bool submit = false;
struct rb_node *rb;
- lockdep_assert_held(&engine->timeline.lock);
+ lockdep_assert_held(&engine->active.lock);
if (port_isset(port)) {
if (intel_engine_has_preemption(engine)) {
@@ -822,7 +822,7 @@ static void guc_submission_tasklet(unsigned long data)
struct i915_request *rq;
unsigned long flags;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
rq = port_request(port);
while (rq && i915_request_completed(rq)) {
@@ -847,7 +847,7 @@ static void guc_submission_tasklet(unsigned long data)
if (!execlists_is_active(execlists, EXECLISTS_ACTIVE_PREEMPT))
guc_dequeue(engine);
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void guc_reset_prepare(struct intel_engine_cs *engine)
@@ -884,7 +884,7 @@ static void guc_reset(struct intel_engine_cs *engine, bool stalled)
struct i915_request *rq;
unsigned long flags;
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
execlists_cancel_port_requests(execlists);
@@ -900,7 +900,7 @@ static void guc_reset(struct intel_engine_cs *engine, bool stalled)
intel_lr_context_reset(engine, rq->hw_context, rq->head, stalled);
out_unlock:
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void guc_cancel_requests(struct intel_engine_cs *engine)
@@ -926,13 +926,13 @@ static void guc_cancel_requests(struct intel_engine_cs *engine)
* submission's irq state, we also wish to remind ourselves that
* it is irq state.)
*/
- spin_lock_irqsave(&engine->timeline.lock, flags);
+ spin_lock_irqsave(&engine->active.lock, flags);
/* Cancel the requests on the HW and clear the ELSP tracker. */
execlists_cancel_port_requests(execlists);
/* Mark all executing requests as skipped. */
- list_for_each_entry(rq, &engine->timeline.requests, link) {
+ list_for_each_entry(rq, &engine->active.requests, sched.link) {
if (!i915_request_signaled(rq))
dma_fence_set_error(&rq->fence, -EIO);
@@ -961,7 +961,7 @@ static void guc_cancel_requests(struct intel_engine_cs *engine)
execlists->queue = RB_ROOT_CACHED;
GEM_BUG_ON(port_isset(execlists->port));
- spin_unlock_irqrestore(&engine->timeline.lock, flags);
+ spin_unlock_irqrestore(&engine->active.lock, flags);
}
static void guc_reset_finish(struct intel_engine_cs *engine)
diff --git a/drivers/gpu/drm/i915/selftests/mock_timeline.c b/drivers/gpu/drm/i915/selftests/mock_timeline.c
index e084476469ef..65b52be23d42 100644
--- a/drivers/gpu/drm/i915/selftests/mock_timeline.c
+++ b/drivers/gpu/drm/i915/selftests/mock_timeline.c
@@ -13,7 +13,6 @@ void mock_timeline_init(struct i915_timeline *timeline, u64 context)
timeline->i915 = NULL;
timeline->fence_context = context;
- spin_lock_init(&timeline->lock);
mutex_init(&timeline->mutex);
INIT_ACTIVE_REQUEST(&timeline->last_request);
--
2.20.1
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