[PATCH 1/1] drm/i915: Introduce i915_sched_engine object
Matthew Brost
matthew.brost at intel.com
Wed May 26 20:03:18 UTC 2021
Introduce i915_sched_engine object which is lower level data structure
that i915_scheduler / generic code can operate on without touching
execlist specific structures. This allows additional submission backends
to be added without breaking the layering.
This is a bit of detour to integrating the i915 with the DRM scheduler
but this object will still exist when the DRM scheduler lands in the
i915. It will however look a bit different. It will encapsulate the
drm_gpu_scheduler object plus and common variables (to the backends)
related to scheduling. Regardless this is a step in the right direction.
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_wait.c | 4 +-
drivers/gpu/drm/i915/gt/intel_engine.h | 16 -
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 77 ++--
.../gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 +-
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 10 +-
drivers/gpu/drm/i915/gt/intel_engine_types.h | 42 +--
drivers/gpu/drm/i915/gt/intel_engine_user.c | 2 +-
.../drm/i915/gt/intel_execlists_submission.c | 350 +++++++++++-------
.../gpu/drm/i915/gt/intel_ring_submission.c | 13 +-
drivers/gpu/drm/i915/gt/mock_engine.c | 17 +-
drivers/gpu/drm/i915/gt/selftest_execlists.c | 36 +-
drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 6 +-
drivers/gpu/drm/i915/gt/selftest_lrc.c | 6 +-
drivers/gpu/drm/i915/gt/selftest_reset.c | 2 +-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 75 ++--
drivers/gpu/drm/i915/i915_gpu_error.c | 7 +-
drivers/gpu/drm/i915/i915_request.c | 50 +--
drivers/gpu/drm/i915/i915_request.h | 2 +-
drivers/gpu/drm/i915/i915_scheduler.c | 168 ++++-----
drivers/gpu/drm/i915/i915_scheduler.h | 65 +++-
drivers/gpu/drm/i915/i915_scheduler_types.h | 63 ++++
21 files changed, 575 insertions(+), 440 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_wait.c b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
index 4b9856d5ba14..af1fbf8e2a9a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_wait.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
@@ -104,8 +104,8 @@ static void fence_set_priority(struct dma_fence *fence,
engine = rq->engine;
rcu_read_lock(); /* RCU serialisation for set-wedged protection */
- if (engine->schedule)
- engine->schedule(rq, attr);
+ if (engine->sched_engine->schedule)
+ engine->sched_engine->schedule(rq, attr);
rcu_read_unlock();
}
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 8d9184920c51..988d9688ae4d 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -123,20 +123,6 @@ execlists_active(const struct intel_engine_execlists *execlists)
return active;
}
-static inline void
-execlists_active_lock_bh(struct intel_engine_execlists *execlists)
-{
- local_bh_disable(); /* prevent local softirq and lock recursion */
- tasklet_lock(&execlists->tasklet);
-}
-
-static inline void
-execlists_active_unlock_bh(struct intel_engine_execlists *execlists)
-{
- tasklet_unlock(&execlists->tasklet);
- local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
-}
-
struct i915_request *
execlists_unwind_incomplete_requests(struct intel_engine_execlists *execlists);
@@ -257,8 +243,6 @@ intel_engine_find_active_request(struct intel_engine_cs *engine);
u32 intel_engine_context_size(struct intel_gt *gt, u8 class);
-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
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 3f9a811eb02b..dc939c8ef288 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -8,6 +8,7 @@
#include "gem/i915_gem_context.h"
#include "i915_drv.h"
+#include "i915_scheduler.h"
#include "intel_breadcrumbs.h"
#include "intel_context.h"
@@ -326,9 +327,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id)
if (engine->context_size)
DRIVER_CAPS(i915)->has_logical_contexts = true;
- /* Nothing to do here, execute in order of dependencies */
- engine->schedule = NULL;
-
ewma__engine_latency_init(&engine->latency);
seqcount_init(&engine->stats.lock);
@@ -583,9 +581,6 @@ void intel_engine_init_execlists(struct intel_engine_cs *engine)
memset(execlists->pending, 0, sizeof(execlists->pending));
execlists->active =
memset(execlists->inflight, 0, sizeof(execlists->inflight));
-
- execlists->queue_priority_hint = INT_MIN;
- execlists->queue = RB_ROOT_CACHED;
}
static void cleanup_status_page(struct intel_engine_cs *engine)
@@ -712,11 +707,17 @@ static int engine_setup_common(struct intel_engine_cs *engine)
goto err_status;
}
+ engine->sched_engine = i915_sched_engine_create(ENGINE_PHYSICAL);
+ if (!engine->sched_engine) {
+ err = -ENOMEM;
+ goto err_sched_engine;
+ }
+ engine->sched_engine->engine = engine;
+
err = intel_engine_init_cmd_parser(engine);
if (err)
goto err_cmd_parser;
- intel_engine_init_active(engine, ENGINE_PHYSICAL);
intel_engine_init_execlists(engine);
intel_engine_init__pm(engine);
intel_engine_init_retire(engine);
@@ -735,6 +736,8 @@ static int engine_setup_common(struct intel_engine_cs *engine)
return 0;
err_cmd_parser:
+ i915_sched_engine_put(engine->sched_engine);
+err_sched_engine:
intel_breadcrumbs_free(engine->breadcrumbs);
err_status:
cleanup_status_page(engine);
@@ -773,11 +776,11 @@ static int measure_breadcrumb_dw(struct intel_context *ce)
frame->rq.ring = &frame->ring;
mutex_lock(&ce->timeline->mutex);
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs;
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
mutex_unlock(&ce->timeline->mutex);
GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */
@@ -786,28 +789,6 @@ static int measure_breadcrumb_dw(struct intel_context *ce)
return dw;
}
-void
-intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass)
-{
- INIT_LIST_HEAD(&engine->active.requests);
- INIT_LIST_HEAD(&engine->active.hold);
-
- 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
-}
-
static struct intel_context *
create_pinned_context(struct intel_engine_cs *engine,
unsigned int hwsp,
@@ -955,10 +936,10 @@ int intel_engines_init(struct intel_gt *gt)
*/
void intel_engine_cleanup_common(struct intel_engine_cs *engine)
{
- GEM_BUG_ON(!list_empty(&engine->active.requests));
- tasklet_kill(&engine->execlists.tasklet); /* flush the callback */
+ GEM_BUG_ON(!list_empty(&engine->sched_engine->requests));
intel_breadcrumbs_free(engine->breadcrumbs);
+ i915_sched_engine_put(engine->sched_engine);
intel_engine_fini_retire(engine);
intel_engine_cleanup_cmd_parser(engine);
@@ -1241,7 +1222,7 @@ static bool ring_is_idle(struct intel_engine_cs *engine)
void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync)
{
- struct tasklet_struct *t = &engine->execlists.tasklet;
+ struct tasklet_struct *t = &engine->sched_engine->tasklet;
if (!t->callback)
return;
@@ -1281,7 +1262,7 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine)
intel_engine_flush_submission(engine);
/* ELSP is empty, but there are ready requests? E.g. after reset */
- if (!RB_EMPTY_ROOT(&engine->execlists.queue.rb_root))
+ if (!i915_sched_engine_is_empty(engine->sched_engine))
return false;
/* Ring stopped? */
@@ -1347,7 +1328,7 @@ static struct intel_timeline *get_timeline(struct i915_request *rq)
struct intel_timeline *tl;
/*
- * Even though we are holding the engine->active.lock here, there
+ * Even though we are holding the engine->sched_engine->lock here, there
* is no control over the submission queue per-se and we are
* inspecting the active state at a random point in time, with an
* unknown queue. Play safe and make sure the timeline remains valid.
@@ -1502,10 +1483,10 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n",
yesno(test_bit(TASKLET_STATE_SCHED,
- &engine->execlists.tasklet.state)),
- enableddisabled(!atomic_read(&engine->execlists.tasklet.count)),
- repr_timer(&engine->execlists.preempt),
- repr_timer(&engine->execlists.timer));
+ &engine->sched_engine->tasklet.state)),
+ enableddisabled(!atomic_read(&engine->sched_engine->tasklet.count)),
+ repr_timer(&execlists->preempt),
+ repr_timer(&execlists->timer));
read = execlists->csb_head;
write = READ_ONCE(*execlists->csb_write);
@@ -1527,7 +1508,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
idx, hws[idx * 2], hws[idx * 2 + 1]);
}
- execlists_active_lock_bh(execlists);
+ sched_engine_active_lock_bh(engine->sched_engine);
rcu_read_lock();
for (port = execlists->active; (rq = *port); port++) {
char hdr[160];
@@ -1558,7 +1539,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
i915_request_show(m, rq, hdr, 0);
}
rcu_read_unlock();
- execlists_active_unlock_bh(execlists);
+ sched_engine_active_unlock_bh(engine->sched_engine);
} else if (INTEL_GEN(dev_priv) > 6) {
drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
ENGINE_READ(engine, RING_PP_DIR_BASE));
@@ -1694,7 +1675,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
drm_printf(m, "\tRequests:\n");
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
rq = intel_engine_find_active_request(engine);
if (rq) {
struct intel_timeline *tl = get_timeline(rq);
@@ -1725,8 +1706,9 @@ void intel_engine_dump(struct intel_engine_cs *engine,
hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
}
}
- drm_printf(m, "\tOn hold?: %lu\n", list_count(&engine->active.hold));
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ drm_printf(m, "\tOn hold?: %lu\n",
+ list_count(&engine->sched_engine->hold));
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base);
wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm);
@@ -1806,7 +1788,7 @@ 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.
*/
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
rcu_read_lock();
request = execlists_active(&engine->execlists);
@@ -1824,7 +1806,8 @@ intel_engine_find_active_request(struct intel_engine_cs *engine)
if (active)
return active;
- list_for_each_entry(request, &engine->active.requests, sched.link) {
+ list_for_each_entry(request, &engine->sched_engine->requests,
+ sched.link) {
if (__i915_request_is_complete(request))
continue;
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
index b99ac41695f3..b6a305e6a974 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
@@ -121,7 +121,7 @@ static void heartbeat(struct work_struct *wrk)
* but all other contexts, including the kernel
* context are stuck waiting for the signal.
*/
- } else if (engine->schedule &&
+ } else if (engine->sched_engine->schedule &&
rq->sched.attr.priority < I915_PRIORITY_BARRIER) {
/*
* Gradually raise the priority of the heartbeat to
@@ -136,7 +136,7 @@ static void heartbeat(struct work_struct *wrk)
attr.priority = I915_PRIORITY_BARRIER;
local_bh_disable();
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
local_bh_enable();
} else {
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index 47f4397095e5..ba6a9931c4e8 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -274,14 +274,16 @@ static int __engine_park(struct intel_wakeref *wf)
intel_engine_park_heartbeat(engine);
intel_breadcrumbs_park(engine->breadcrumbs);
- /* Must be reset upon idling, or we may miss the busy wakeup. */
- GEM_BUG_ON(engine->execlists.queue_priority_hint != INT_MIN);
+ /*
+ * XXX: Must be reset upon idling, or we may miss the busy wakeup.
+ * queue_priority_hint only used in execlists submission but works in
+ * other modes as default is INT_MIN.
+ */
+ GEM_BUG_ON(engine->sched_engine->queue_priority_hint != INT_MIN);
if (engine->park)
engine->park(engine);
- engine->execlists.no_priolist = false;
-
/* While gt calls i915_vma_parked(), we have to break the lock cycle */
intel_gt_pm_put_async(engine->gt);
return 0;
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index 9ef349cd5cea..93aa22680db0 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -59,6 +59,7 @@ struct drm_i915_reg_table;
struct i915_gem_context;
struct i915_request;
struct i915_sched_attr;
+struct i915_sched_engine;
struct intel_gt;
struct intel_ring;
struct intel_uncore;
@@ -137,11 +138,6 @@ struct st_preempt_hang {
* driver and the hardware state for execlist mode of submission.
*/
struct intel_engine_execlists {
- /**
- * @tasklet: softirq tasklet for bottom handler
- */
- struct tasklet_struct tasklet;
-
/**
* @timer: kick the current context if its timeslice expires
*/
@@ -152,11 +148,6 @@ struct intel_engine_execlists {
*/
struct timer_list preempt;
- /**
- * @default_priolist: priority list for I915_PRIORITY_NORMAL
- */
- struct i915_priolist default_priolist;
-
/**
* @ccid: identifier for contexts submitted to this engine
*/
@@ -191,11 +182,6 @@ struct intel_engine_execlists {
*/
u32 reset_ccid;
- /**
- * @no_priolist: priority lists disabled
- */
- bool no_priolist;
-
/**
* @submit_reg: gen-specific execlist submission register
* set to the ExecList Submission Port (elsp) register pre-Gen11 and to
@@ -238,23 +224,8 @@ struct intel_engine_execlists {
unsigned int port_mask;
/**
- * @queue_priority_hint: Highest pending priority.
- *
- * When we add requests into the queue, or adjust the priority of
- * executing requests, we compute the maximum priority of those
- * pending requests. We can then use this value to determine if
- * we need to preempt the executing requests to service the queue.
- * However, since the we may have recorded the priority of an inflight
- * request we wanted to preempt but since completed, at the time of
- * dequeuing the priority hint may no longer may match the highest
- * available request priority.
+ * @virtual: virtual of requests, in priority lists
*/
- int queue_priority_hint;
-
- /**
- * @queue: queue of requests, in priority lists
- */
- struct rb_root_cached queue;
struct rb_root_cached virtual;
/**
@@ -326,11 +297,7 @@ struct intel_engine_cs {
struct intel_sseu sseu;
- struct {
- spinlock_t lock;
- struct list_head requests;
- struct list_head hold; /* ready requests, but on hold */
- } active;
+ struct i915_sched_engine *sched_engine;
/* keep a request in reserve for a [pm] barrier under oom */
struct i915_request *request_pool;
@@ -459,9 +426,6 @@ struct intel_engine_cs {
* dependencies may need rescheduling. Note the request itself may
* not be ready to run!
*/
- void (*schedule)(struct i915_request *request,
- const struct i915_sched_attr *attr);
-
void (*release)(struct intel_engine_cs *engine);
struct intel_engine_execlists execlists;
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_user.c b/drivers/gpu/drm/i915/gt/intel_engine_user.c
index 3cca7ea2d6ea..84142127ebd8 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_user.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_user.c
@@ -108,7 +108,7 @@ static void set_scheduler_caps(struct drm_i915_private *i915)
for_each_uabi_engine(engine, i915) { /* all engines must agree! */
int i;
- if (engine->schedule)
+ if (engine->sched_engine->schedule)
enabled |= (I915_SCHEDULER_CAP_ENABLED |
I915_SCHEDULER_CAP_PRIORITY);
else
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 8db200422950..0927a2416b52 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -273,11 +273,11 @@ static int effective_prio(const struct i915_request *rq)
return prio;
}
-static int queue_prio(const struct intel_engine_execlists *execlists)
+static int queue_prio(const struct i915_sched_engine *sched_engine)
{
struct rb_node *rb;
- rb = rb_first_cached(&execlists->queue);
+ rb = rb_first_cached(&sched_engine->queue);
if (!rb)
return INT_MIN;
@@ -318,14 +318,14 @@ static bool need_preempt(const struct intel_engine_cs *engine,
* to preserve FIFO ordering of dependencies.
*/
last_prio = max(effective_prio(rq), I915_PRIORITY_NORMAL - 1);
- if (engine->execlists.queue_priority_hint <= last_prio)
+ if (engine->sched_engine->queue_priority_hint <= last_prio)
return false;
/*
* 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->sched.link, &engine->active.requests) &&
+ if (!list_is_last(&rq->sched.link, &engine->sched_engine->requests) &&
rq_prio(list_next_entry(rq, sched.link)) > last_prio)
return true;
@@ -340,7 +340,7 @@ static bool need_preempt(const struct intel_engine_cs *engine,
* context, it's priority would not exceed ELSP[0] aka last_prio.
*/
return max(virtual_prio(&engine->execlists),
- queue_prio(&engine->execlists)) > last_prio;
+ queue_prio(engine->sched_engine)) > last_prio;
}
__maybe_unused static bool
@@ -367,10 +367,10 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine)
struct list_head *pl;
int prio = I915_PRIORITY_INVALID;
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
list_for_each_entry_safe_reverse(rq, rn,
- &engine->active.requests,
+ &engine->sched_engine->requests,
sched.link) {
if (__i915_request_is_complete(rq)) {
list_del_init(&rq->sched.link);
@@ -382,9 +382,10 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine)
GEM_BUG_ON(rq_prio(rq) == I915_PRIORITY_INVALID);
if (rq_prio(rq) != prio) {
prio = rq_prio(rq);
- pl = i915_sched_lookup_priolist(engine, prio);
+ pl = i915_sched_lookup_priolist(engine->sched_engine,
+ prio);
}
- GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
+ GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
list_move(&rq->sched.link, pl);
set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
@@ -534,13 +535,13 @@ resubmit_virtual_request(struct i915_request *rq, struct virtual_engine *ve)
{
struct intel_engine_cs *engine = rq->engine;
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
WRITE_ONCE(rq->engine, &ve->base);
ve->base.submit_request(rq);
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
}
static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
@@ -569,7 +570,7 @@ static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
resubmit_virtual_request(rq, ve);
if (READ_ONCE(ve->request))
- tasklet_hi_schedule(&ve->base.execlists.tasklet);
+ i915_sched_engine_hi_kick(ve->base.sched_engine);
}
static void __execlists_schedule_out(struct i915_request * const rq,
@@ -579,7 +580,7 @@ static void __execlists_schedule_out(struct i915_request * const rq,
unsigned int ccid;
/*
- * NB process_csb() is not under the engine->active.lock and hence
+ * NB process_csb() is not under the engine->sched_engine->lock and hence
* schedule_out can race with schedule_in meaning that we should
* refrain from doing non-trivial work here.
*/
@@ -721,12 +722,11 @@ dump_port(char *buf, int buflen, const char *prefix, struct i915_request *rq)
}
static __maybe_unused noinline void
-trace_ports(const struct intel_engine_execlists *execlists,
+trace_ports(const struct intel_engine_cs *engine,
+ const struct intel_engine_execlists *execlists,
const char *msg,
struct i915_request * const *ports)
{
- const struct intel_engine_cs *engine =
- container_of(execlists, typeof(*engine), execlists);
char __maybe_unused p0[40], p1[40];
if (!ports[0])
@@ -738,25 +738,24 @@ trace_ports(const struct intel_engine_execlists *execlists,
}
static bool
-reset_in_progress(const struct intel_engine_execlists *execlists)
+reset_in_progress(const struct intel_engine_cs *engine)
{
- return unlikely(!__tasklet_is_enabled(&execlists->tasklet));
+ return unlikely(!__tasklet_is_enabled(&engine->sched_engine->tasklet));
}
static __maybe_unused noinline bool
-assert_pending_valid(const struct intel_engine_execlists *execlists,
+assert_pending_valid(struct intel_engine_cs *engine,
+ const struct intel_engine_execlists *execlists,
const char *msg)
{
- struct intel_engine_cs *engine =
- container_of(execlists, typeof(*engine), execlists);
struct i915_request * const *port, *rq, *prev = NULL;
struct intel_context *ce = NULL;
u32 ccid = -1;
- trace_ports(execlists, msg, execlists->pending);
+ trace_ports(engine, execlists, msg, execlists->pending);
/* We may be messing around with the lists during reset, lalala */
- if (reset_in_progress(execlists))
+ if (reset_in_progress(engine))
return true;
if (!execlists->pending[0]) {
@@ -878,7 +877,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
struct intel_engine_execlists *execlists = &engine->execlists;
unsigned int n;
- GEM_BUG_ON(!assert_pending_valid(execlists, "submit"));
+ GEM_BUG_ON(!assert_pending_valid(engine, execlists, "submit"));
/*
* We can skip acquiring intel_runtime_pm_get() here as it was taken
@@ -1096,7 +1095,8 @@ static void defer_active(struct intel_engine_cs *engine)
if (!rq)
return;
- defer_request(rq, i915_sched_lookup_priolist(engine, rq_prio(rq)));
+ defer_request(rq, i915_sched_lookup_priolist(engine->sched_engine,
+ rq_prio(rq)));
}
static bool
@@ -1133,13 +1133,14 @@ static bool needs_timeslice(const struct intel_engine_cs *engine,
return false;
/* If ELSP[1] is occupied, always check to see if worth slicing */
- if (!list_is_last_rcu(&rq->sched.link, &engine->active.requests)) {
+ if (!list_is_last_rcu(&rq->sched.link,
+ &engine->sched_engine->requests)) {
ENGINE_TRACE(engine, "timeslice required for second inflight context\n");
return true;
}
/* Otherwise, ELSP[0] is by itself, but may be waiting in the queue */
- if (!RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)) {
+ if (!i915_sched_engine_is_empty(engine->sched_engine)) {
ENGINE_TRACE(engine, "timeslice required for queue\n");
return true;
}
@@ -1187,7 +1188,7 @@ static void start_timeslice(struct intel_engine_cs *engine)
* its timeslice, so recheck.
*/
if (!timer_pending(&el->timer))
- tasklet_hi_schedule(&el->tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
return;
}
@@ -1235,6 +1236,7 @@ static bool completed(const struct i915_request *rq)
static void execlists_dequeue(struct intel_engine_cs *engine)
{
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
struct intel_engine_execlists * const execlists = &engine->execlists;
struct i915_request **port = execlists->pending;
struct i915_request ** const last_port = port + execlists->port_mask;
@@ -1265,7 +1267,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
* and context switches) submission.
*/
- spin_lock(&engine->active.lock);
+ spin_lock(&engine->sched_engine->lock);
/*
* If the queue is higher priority than the last
@@ -1287,7 +1289,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
last->fence.context,
last->fence.seqno,
last->sched.attr.priority,
- execlists->queue_priority_hint);
+ sched_engine->queue_priority_hint);
record_preemption(execlists);
/*
@@ -1313,7 +1315,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
yesno(timer_expired(&execlists->timer)),
last->fence.context, last->fence.seqno,
rq_prio(last),
- execlists->queue_priority_hint,
+ sched_engine->queue_priority_hint,
yesno(timeslice_yield(execlists, last)));
/*
@@ -1365,7 +1367,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
* Even if ELSP[1] is occupied and not worthy
* of timeslices, our queue might be.
*/
- spin_unlock(&engine->active.lock);
+ spin_unlock(&sched_engine->lock);
return;
}
}
@@ -1375,7 +1377,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
while ((ve = first_virtual_engine(engine))) {
struct i915_request *rq;
- spin_lock(&ve->base.active.lock);
+ spin_lock(&ve->base.sched_engine->lock);
rq = ve->request;
if (unlikely(!virtual_matches(ve, rq, engine)))
@@ -1384,14 +1386,14 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
GEM_BUG_ON(rq->engine != &ve->base);
GEM_BUG_ON(rq->context != &ve->context);
- if (unlikely(rq_prio(rq) < queue_prio(execlists))) {
- spin_unlock(&ve->base.active.lock);
+ if (unlikely(rq_prio(rq) < queue_prio(sched_engine))) {
+ spin_unlock(&ve->base.sched_engine->lock);
break;
}
if (last && !can_merge_rq(last, rq)) {
- spin_unlock(&ve->base.active.lock);
- spin_unlock(&engine->active.lock);
+ spin_unlock(&ve->base.sched_engine->lock);
+ spin_unlock(&sched_engine->lock);
return; /* leave this for another sibling */
}
@@ -1405,7 +1407,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
yesno(engine != ve->siblings[0]));
WRITE_ONCE(ve->request, NULL);
- WRITE_ONCE(ve->base.execlists.queue_priority_hint, INT_MIN);
+ WRITE_ONCE(ve->base.sched_engine->queue_priority_hint, INT_MIN);
rb = &ve->nodes[engine->id].rb;
rb_erase_cached(rb, &execlists->virtual);
@@ -1437,7 +1439,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
i915_request_put(rq);
unlock:
- spin_unlock(&ve->base.active.lock);
+ spin_unlock(&ve->base.sched_engine->lock);
/*
* Hmm, we have a bunch of virtual engine requests,
@@ -1450,7 +1452,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
break;
}
- while ((rb = rb_first_cached(&execlists->queue))) {
+ while ((rb = rb_first_cached(&sched_engine->queue))) {
struct i915_priolist *p = to_priolist(rb);
struct i915_request *rq, *rn;
@@ -1529,7 +1531,7 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
}
}
- rb_erase_cached(&p->node, &execlists->queue);
+ rb_erase_cached(&p->node, &sched_engine->queue);
i915_priolist_free(p);
}
done:
@@ -1551,8 +1553,9 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
* request triggering preemption on the next dequeue (or subsequent
* interrupt for secondary ports).
*/
- execlists->queue_priority_hint = queue_prio(execlists);
- spin_unlock(&engine->active.lock);
+ sched_engine->queue_priority_hint = queue_prio(sched_engine);
+ i915_sched_engine_reset_on_empty(sched_engine);
+ spin_unlock(&sched_engine->lock);
/*
* We can skip poking the HW if we ended up with exactly the same set
@@ -1767,8 +1770,8 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
* access. Either we are inside the tasklet, or the tasklet is disabled
* and we assume that is only inside the reset paths and so serialised.
*/
- GEM_BUG_ON(!tasklet_is_locked(&execlists->tasklet) &&
- !reset_in_progress(execlists));
+ GEM_BUG_ON(!tasklet_is_locked(&engine->sched_engine->tasklet) &&
+ !reset_in_progress(engine));
/*
* Note that csb_write, csb_status may be either in HWSP or mmio.
@@ -1866,12 +1869,12 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
smp_wmb(); /* notify execlists_active() */
/* cancel old inflight, prepare for switch */
- trace_ports(execlists, "preempted", old);
+ trace_ports(engine, execlists, "preempted", old);
while (*old)
*inactive++ = *old++;
/* switch pending to inflight */
- GEM_BUG_ON(!assert_pending_valid(execlists, "promote"));
+ GEM_BUG_ON(!assert_pending_valid(engine, execlists, "promote"));
copy_ports(execlists->inflight,
execlists->pending,
execlists_num_ports(execlists));
@@ -1889,7 +1892,7 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
}
/* port0 completed, advanced to port1 */
- trace_ports(execlists, "completed", execlists->active);
+ trace_ports(engine, execlists, "completed", execlists->active);
/*
* We rely on the hardware being strongly
@@ -1979,7 +1982,7 @@ static void __execlists_hold(struct i915_request *rq)
__i915_request_unsubmit(rq);
clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
- list_move_tail(&rq->sched.link, &rq->engine->active.hold);
+ list_move_tail(&rq->sched.link, &rq->engine->sched_engine->hold);
i915_request_set_hold(rq);
RQ_TRACE(rq, "on hold\n");
@@ -2016,7 +2019,7 @@ static bool execlists_hold(struct intel_engine_cs *engine,
if (i915_request_on_hold(rq))
return false;
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
if (__i915_request_is_complete(rq)) { /* too late! */
rq = NULL;
@@ -2032,10 +2035,10 @@ static bool execlists_hold(struct intel_engine_cs *engine,
GEM_BUG_ON(i915_request_on_hold(rq));
GEM_BUG_ON(rq->engine != engine);
__execlists_hold(rq);
- GEM_BUG_ON(list_empty(&engine->active.hold));
+ GEM_BUG_ON(list_empty(&engine->sched_engine->hold));
unlock:
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
return rq;
}
@@ -2079,7 +2082,7 @@ static void __execlists_unhold(struct i915_request *rq)
i915_request_clear_hold(rq);
list_move_tail(&rq->sched.link,
- i915_sched_lookup_priolist(rq->engine,
+ i915_sched_lookup_priolist(rq->engine->sched_engine,
rq_prio(rq)));
set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
@@ -2115,7 +2118,7 @@ static void __execlists_unhold(struct i915_request *rq)
static void execlists_unhold(struct intel_engine_cs *engine,
struct i915_request *rq)
{
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
/*
* Move this request back to the priority queue, and all of its
@@ -2123,12 +2126,12 @@ static void execlists_unhold(struct intel_engine_cs *engine,
*/
__execlists_unhold(rq);
- if (rq_prio(rq) > engine->execlists.queue_priority_hint) {
- engine->execlists.queue_priority_hint = rq_prio(rq);
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ if (rq_prio(rq) > engine->sched_engine->queue_priority_hint) {
+ engine->sched_engine->queue_priority_hint = rq_prio(rq);
+ i915_sched_engine_hi_kick(engine->sched_engine);
}
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
}
struct execlists_capture {
@@ -2258,13 +2261,13 @@ static void execlists_capture(struct intel_engine_cs *engine)
if (!cap)
return;
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
cap->rq = active_context(engine, active_ccid(engine));
if (cap->rq) {
cap->rq = active_request(cap->rq->context->timeline, cap->rq);
cap->rq = i915_request_get_rcu(cap->rq);
}
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
if (!cap->rq)
goto err_free;
@@ -2316,13 +2319,13 @@ static void execlists_reset(struct intel_engine_cs *engine, const char *msg)
ENGINE_TRACE(engine, "reset for %s\n", msg);
/* Mark this tasklet as disabled to avoid waiting for it to complete */
- tasklet_disable_nosync(&engine->execlists.tasklet);
+ tasklet_disable_nosync(&engine->sched_engine->tasklet);
ring_set_paused(engine, 1); /* Freeze the current request in place */
execlists_capture(engine);
intel_engine_reset(engine, msg);
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->sched_engine->tasklet);
clear_and_wake_up_bit(bit, lock);
}
@@ -2345,8 +2348,9 @@ static bool preempt_timeout(const struct intel_engine_cs *const engine)
*/
static void execlists_submission_tasklet(struct tasklet_struct *t)
{
- struct intel_engine_cs * const engine =
- from_tasklet(engine, t, execlists.tasklet);
+ struct i915_sched_engine *sched_engine =
+ from_tasklet(sched_engine, t, tasklet);
+ struct intel_engine_cs * const engine = sched_engine->engine;
struct i915_request *post[2 * EXECLIST_MAX_PORTS];
struct i915_request **inactive;
@@ -2421,13 +2425,16 @@ static void execlists_irq_handler(struct intel_engine_cs *engine, u16 iir)
intel_engine_signal_breadcrumbs(engine);
if (tasklet)
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
}
static void __execlists_kick(struct intel_engine_execlists *execlists)
{
+ struct intel_engine_cs *engine =
+ container_of(execlists, typeof(*engine), execlists);
+
/* Kick the tasklet for some interrupt coalescing and reset handling */
- tasklet_hi_schedule(&execlists->tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
}
#define execlists_kick(t, member) \
@@ -2448,19 +2455,20 @@ static void queue_request(struct intel_engine_cs *engine,
{
GEM_BUG_ON(!list_empty(&rq->sched.link));
list_add_tail(&rq->sched.link,
- i915_sched_lookup_priolist(engine, rq_prio(rq)));
+ i915_sched_lookup_priolist(engine->sched_engine,
+ rq_prio(rq)));
set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
}
static bool submit_queue(struct intel_engine_cs *engine,
const struct i915_request *rq)
{
- struct intel_engine_execlists *execlists = &engine->execlists;
+ struct i915_sched_engine *sched_engine = engine->sched_engine;
- if (rq_prio(rq) <= execlists->queue_priority_hint)
+ if (rq_prio(rq) <= sched_engine->queue_priority_hint)
return false;
- execlists->queue_priority_hint = rq_prio(rq);
+ sched_engine->queue_priority_hint = rq_prio(rq);
return true;
}
@@ -2468,7 +2476,7 @@ static bool ancestor_on_hold(const struct intel_engine_cs *engine,
const struct i915_request *rq)
{
GEM_BUG_ON(i915_request_on_hold(rq));
- return !list_empty(&engine->active.hold) && hold_request(rq);
+ return !list_empty(&engine->sched_engine->hold) && hold_request(rq);
}
static void execlists_submit_request(struct i915_request *request)
@@ -2477,23 +2485,24 @@ 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->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
if (unlikely(ancestor_on_hold(engine, request))) {
RQ_TRACE(request, "ancestor on hold\n");
- list_add_tail(&request->sched.link, &engine->active.hold);
+ list_add_tail(&request->sched.link,
+ &engine->sched_engine->hold);
i915_request_set_hold(request);
} else {
queue_request(engine, request);
- GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
+ GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
GEM_BUG_ON(list_empty(&request->sched.link));
if (submit_queue(engine, request))
- __execlists_kick(&engine->execlists);
+ i915_sched_engine_hi_kick(engine->sched_engine);
}
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static int
@@ -2800,10 +2809,10 @@ static int execlists_resume(struct intel_engine_cs *engine)
static void execlists_reset_prepare(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
ENGINE_TRACE(engine, "depth<-%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&sched_engine->tasklet.count));
/*
* Prevent request submission to the hardware until we have
@@ -2814,8 +2823,8 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine)
* Turning off the execlists->tasklet until the reset is over
* prevents the race.
*/
- __tasklet_disable_sync_once(&execlists->tasklet);
- GEM_BUG_ON(!reset_in_progress(execlists));
+ __tasklet_disable_sync_once(&sched_engine->tasklet);
+ GEM_BUG_ON(!reset_in_progress(engine));
/*
* We stop engines, otherwise we might get failed reset and a
@@ -2957,23 +2966,25 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
/* Push back any incomplete requests for replay after the reset. */
rcu_read_lock();
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
__unwind_incomplete_requests(engine);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
rcu_read_unlock();
}
static void nop_submission_tasklet(struct tasklet_struct *t)
{
- struct intel_engine_cs * const engine =
- from_tasklet(engine, t, execlists.tasklet);
+ struct i915_sched_engine *sched_engine =
+ from_tasklet(sched_engine, t, tasklet);
+ struct intel_engine_cs * const engine = sched_engine->engine;
/* The driver is wedged; don't process any more events. */
- WRITE_ONCE(engine->execlists.queue_priority_hint, INT_MIN);
+ WRITE_ONCE(engine->sched_engine->queue_priority_hint, INT_MIN);
}
static void execlists_reset_cancel(struct intel_engine_cs *engine)
{
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
struct intel_engine_execlists * const execlists = &engine->execlists;
struct i915_request *rq, *rn;
struct rb_node *rb;
@@ -2998,15 +3009,15 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
execlists_reset_csb(engine, true);
rcu_read_lock();
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&sched_engine->lock, flags);
/* Mark all executing requests as skipped. */
- list_for_each_entry(rq, &engine->active.requests, sched.link)
+ list_for_each_entry(rq, &sched_engine->requests, sched.link)
i915_request_put(i915_request_mark_eio(rq));
intel_engine_signal_breadcrumbs(engine);
/* Flush the queued requests to the timeline list (for retiring). */
- while ((rb = rb_first_cached(&execlists->queue))) {
+ while ((rb = rb_first_cached(&sched_engine->queue))) {
struct i915_priolist *p = to_priolist(rb);
priolist_for_each_request_consume(rq, rn, p) {
@@ -3016,12 +3027,12 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
}
}
- rb_erase_cached(&p->node, &execlists->queue);
+ rb_erase_cached(&p->node, &sched_engine->queue);
i915_priolist_free(p);
}
/* On-hold requests will be flushed to timeline upon their release */
- list_for_each_entry(rq, &engine->active.hold, sched.link)
+ list_for_each_entry(rq, &sched_engine->hold, sched.link)
i915_request_put(i915_request_mark_eio(rq));
/* Cancel all attached virtual engines */
@@ -3032,7 +3043,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
rb_erase_cached(rb, &execlists->virtual);
RB_CLEAR_NODE(rb);
- spin_lock(&ve->base.active.lock);
+ spin_lock(&ve->base.sched_engine->lock);
rq = fetch_and_zero(&ve->request);
if (rq) {
if (i915_request_mark_eio(rq)) {
@@ -3042,26 +3053,26 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
}
i915_request_put(rq);
- ve->base.execlists.queue_priority_hint = INT_MIN;
+ ve->base.sched_engine->queue_priority_hint = INT_MIN;
}
- spin_unlock(&ve->base.active.lock);
+ spin_unlock(&ve->base.sched_engine->lock);
}
/* Remaining _unready_ requests will be nop'ed when submitted */
- execlists->queue_priority_hint = INT_MIN;
- execlists->queue = RB_ROOT_CACHED;
+ sched_engine->queue_priority_hint = INT_MIN;
+ sched_engine->queue = RB_ROOT_CACHED;
- GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
- execlists->tasklet.callback = nop_submission_tasklet;
+ GEM_BUG_ON(__tasklet_is_enabled(&sched_engine->tasklet));
+ sched_engine->tasklet.callback = nop_submission_tasklet;
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
rcu_read_unlock();
}
static void execlists_reset_finish(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
/*
* After a GPU reset, we may have requests to replay. Do so now while
@@ -3073,14 +3084,14 @@ static void execlists_reset_finish(struct intel_engine_cs *engine)
* reset as the next level of recovery, and as a final resort we
* will declare the device wedged.
*/
- GEM_BUG_ON(!reset_in_progress(execlists));
+ GEM_BUG_ON(!reset_in_progress(engine));
/* And kick in case we missed a new request submission. */
- if (__tasklet_enable(&execlists->tasklet))
- __execlists_kick(execlists);
+ if (__tasklet_enable(&sched_engine->tasklet))
+ i915_sched_engine_hi_kick(sched_engine);
ENGINE_TRACE(engine, "depth->%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&sched_engine->tasklet.count));
}
static void gen8_logical_ring_enable_irq(struct intel_engine_cs *engine)
@@ -3110,11 +3121,59 @@ static bool can_preempt(struct intel_engine_cs *engine)
return engine->class != RENDER_CLASS;
}
+static void kick_execlists(const struct i915_request *rq, int prio)
+{
+ struct i915_sched_engine *sched_engine = rq->engine->sched_engine;
+ const struct i915_request *inflight;
+
+ /*
+ * We only need to kick the tasklet once for the high priority
+ * new context we add into the queue.
+ */
+ if (prio <= sched_engine->queue_priority_hint)
+ return;
+
+ rcu_read_lock();
+
+ /* Nothing currently active? We're overdue for a submission! */
+ inflight = execlists_active(&rq->engine->execlists);
+ if (!inflight)
+ goto unlock;
+
+ /*
+ * If we are already the currently executing context, don't
+ * bother evaluating if we should preempt ourselves.
+ */
+ if (inflight->context == rq->context)
+ goto unlock;
+
+ ENGINE_TRACE(rq->engine,
+ "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
+ prio,
+ rq->fence.context, rq->fence.seqno,
+ inflight->fence.context, inflight->fence.seqno,
+ inflight->sched.attr.priority);
+
+ sched_engine->queue_priority_hint = prio;
+
+ /*
+ * Allow preemption of low -> normal -> high, but we do
+ * not allow low priority tasks to preempt other low priority
+ * tasks under the impression that latency for low priority
+ * tasks does not matter (as much as background throughput),
+ * so kiss.
+ */
+ if (prio >= max(I915_PRIORITY_NORMAL, rq_prio(inflight)))
+ i915_sched_engine_hi_kick(sched_engine);
+
+unlock:
+ rcu_read_unlock();
+}
+
static void execlists_set_default_submission(struct intel_engine_cs *engine)
{
engine->submit_request = execlists_submit_request;
- engine->schedule = i915_schedule;
- engine->execlists.tasklet.callback = execlists_submission_tasklet;
+ engine->sched_engine->tasklet.callback = execlists_submission_tasklet;
}
static void execlists_shutdown(struct intel_engine_cs *engine)
@@ -3122,7 +3181,7 @@ static void execlists_shutdown(struct intel_engine_cs *engine)
/* Synchronise with residual timers and any softirq they raise */
del_timer_sync(&engine->execlists.timer);
del_timer_sync(&engine->execlists.preempt);
- tasklet_kill(&engine->execlists.tasklet);
+ i915_sched_engine_kill(engine->sched_engine);
}
static void execlists_release(struct intel_engine_cs *engine)
@@ -3238,10 +3297,14 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
struct intel_uncore *uncore = engine->uncore;
u32 base = engine->mmio_base;
- tasklet_setup(&engine->execlists.tasklet, execlists_submission_tasklet);
+ tasklet_setup(&engine->sched_engine->tasklet,
+ execlists_submission_tasklet);
timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
+ engine->sched_engine->schedule = i915_schedule;
+ engine->sched_engine->kick_backend = kick_execlists;
+
logical_ring_default_vfuncs(engine);
logical_ring_default_irqs(engine);
@@ -3286,7 +3349,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
static struct list_head *virtual_queue(struct virtual_engine *ve)
{
- return &ve->base.execlists.default_priolist.requests;
+ return &ve->base.sched_engine->default_priolist.requests;
}
static void rcu_virtual_context_destroy(struct work_struct *wrk)
@@ -3301,7 +3364,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
if (unlikely(ve->request)) {
struct i915_request *old;
- spin_lock_irq(&ve->base.active.lock);
+ spin_lock_irq(&ve->base.sched_engine->lock);
old = fetch_and_zero(&ve->request);
if (old) {
@@ -3310,7 +3373,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
i915_request_put(old);
}
- spin_unlock_irq(&ve->base.active.lock);
+ spin_unlock_irq(&ve->base.sched_engine->lock);
}
/*
@@ -3320,7 +3383,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
* rbtrees as in the case it is running in parallel, it may reinsert
* the rb_node into a sibling.
*/
- tasklet_kill(&ve->base.execlists.tasklet);
+ i915_sched_engine_kill(ve->base.sched_engine);
/* Decouple ourselves from the siblings, no more access allowed. */
for (n = 0; n < ve->num_siblings; n++) {
@@ -3330,21 +3393,23 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
if (RB_EMPTY_NODE(node))
continue;
- spin_lock_irq(&sibling->active.lock);
+ spin_lock_irq(&sibling->sched_engine->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->active.lock);
+ spin_unlock_irq(&sibling->sched_engine->lock);
}
- GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet));
+ GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.sched_engine->tasklet));
GEM_BUG_ON(!list_empty(virtual_queue(ve)));
lrc_fini(&ve->context);
intel_context_fini(&ve->context);
intel_breadcrumbs_free(ve->base.breadcrumbs);
+ if (ve->base.sched_engine)
+ i915_sched_engine_put(ve->base.sched_engine);
intel_engine_free_request_pool(&ve->base);
kfree(ve->bonds);
@@ -3475,16 +3540,18 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve)
ENGINE_TRACE(&ve->base, "rq=%llx:%lld, mask=%x, prio=%d\n",
rq->fence.context, rq->fence.seqno,
- mask, ve->base.execlists.queue_priority_hint);
+ mask, ve->base.sched_engine->queue_priority_hint);
return mask;
}
static void virtual_submission_tasklet(struct tasklet_struct *t)
{
+ struct i915_sched_engine *sched_engine =
+ from_tasklet(sched_engine, t, tasklet);
struct virtual_engine * const ve =
- from_tasklet(ve, t, base.execlists.tasklet);
- const int prio = READ_ONCE(ve->base.execlists.queue_priority_hint);
+ (struct virtual_engine *)sched_engine->engine;
+ const int prio = READ_ONCE(ve->base.sched_engine->queue_priority_hint);
intel_engine_mask_t mask;
unsigned int n;
@@ -3503,7 +3570,7 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
if (!READ_ONCE(ve->request))
break; /* already handled by a sibling's tasklet */
- spin_lock_irq(&sibling->active.lock);
+ spin_lock_irq(&sibling->sched_engine->lock);
if (unlikely(!(mask & sibling->mask))) {
if (!RB_EMPTY_NODE(&node->rb)) {
@@ -3552,11 +3619,11 @@ static void virtual_submission_tasklet(struct tasklet_struct *t)
submit_engine:
GEM_BUG_ON(RB_EMPTY_NODE(&node->rb));
node->prio = prio;
- if (first && prio > sibling->execlists.queue_priority_hint)
- tasklet_hi_schedule(&sibling->execlists.tasklet);
+ if (first && prio > sibling->sched_engine->queue_priority_hint)
+ i915_sched_engine_hi_kick(sibling->sched_engine);
unlock_engine:
- spin_unlock_irq(&sibling->active.lock);
+ spin_unlock_irq(&sibling->sched_engine->lock);
if (intel_context_inflight(&ve->context))
break;
@@ -3574,7 +3641,7 @@ static void virtual_submit_request(struct i915_request *rq)
GEM_BUG_ON(ve->base.submit_request != virtual_submit_request);
- spin_lock_irqsave(&ve->base.active.lock, flags);
+ spin_lock_irqsave(&ve->base.sched_engine->lock, flags);
/* By the time we resubmit a request, it may be completed */
if (__i915_request_is_complete(rq)) {
@@ -3588,16 +3655,16 @@ static void virtual_submit_request(struct i915_request *rq)
i915_request_put(ve->request);
}
- ve->base.execlists.queue_priority_hint = rq_prio(rq);
+ ve->base.sched_engine->queue_priority_hint = rq_prio(rq);
ve->request = i915_request_get(rq);
GEM_BUG_ON(!list_empty(virtual_queue(ve)));
list_move_tail(&rq->sched.link, virtual_queue(ve));
- tasklet_hi_schedule(&ve->base.execlists.tasklet);
+ i915_sched_engine_hi_kick(ve->base.sched_engine);
unlock:
- spin_unlock_irqrestore(&ve->base.active.lock, flags);
+ spin_unlock_irqrestore(&ve->base.sched_engine->lock, flags);
}
static struct ve_bond *
@@ -3681,19 +3748,24 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
snprintf(ve->base.name, sizeof(ve->base.name), "virtual");
- intel_engine_init_active(&ve->base, ENGINE_VIRTUAL);
- intel_engine_init_execlists(&ve->base);
+ ve->base.sched_engine = i915_sched_engine_create(ENGINE_VIRTUAL);
+ if (!ve->base.sched_engine) {
+ kfree(ve);
+ return ERR_PTR(-ENOMEM);
+ }
+ ve->base.sched_engine->engine = &ve->base;
ve->base.cops = &virtual_context_ops;
ve->base.request_alloc = execlists_request_alloc;
- ve->base.schedule = i915_schedule;
+ ve->base.sched_engine->schedule = i915_schedule;
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_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet);
+ ve->base.sched_engine->queue_priority_hint = INT_MIN;
+ tasklet_setup(&ve->base.sched_engine->tasklet,
+ virtual_submission_tasklet);
intel_context_init(&ve->context, &ve->base);
@@ -3721,7 +3793,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
* layering if we handle cloning of the requests and
* submitting a copy into each backend.
*/
- if (sibling->execlists.tasklet.callback !=
+ if (sibling->sched_engine->tasklet.callback !=
execlists_submission_tasklet) {
err = -ENODEV;
goto err_put;
@@ -3756,6 +3828,9 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
"v%dx%d", ve->base.class, count);
ve->base.context_size = sibling->context_size;
+ ve->base.sched_engine->kick_backend =
+ sibling->sched_engine->kick_backend;
+
ve->base.emit_bb_start = sibling->emit_bb_start;
ve->base.emit_flush = sibling->emit_flush;
ve->base.emit_init_breadcrumb = sibling->emit_init_breadcrumb;
@@ -3848,17 +3923,18 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
int indent),
unsigned int max)
{
+ const struct i915_sched_engine *sched_engine = engine->sched_engine;
const struct intel_engine_execlists *execlists = &engine->execlists;
struct i915_request *rq, *last;
unsigned long flags;
unsigned int count;
struct rb_node *rb;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
last = NULL;
count = 0;
- list_for_each_entry(rq, &engine->active.requests, sched.link) {
+ list_for_each_entry(rq, &sched_engine->requests, sched.link) {
if (count++ < max - 1)
show_request(m, rq, "\t\t", 0);
else
@@ -3873,13 +3949,13 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
show_request(m, last, "\t\t", 0);
}
- if (execlists->queue_priority_hint != INT_MIN)
+ if (sched_engine->queue_priority_hint != INT_MIN)
drm_printf(m, "\t\tQueue priority hint: %d\n",
- READ_ONCE(execlists->queue_priority_hint));
+ READ_ONCE(sched_engine->queue_priority_hint));
last = NULL;
count = 0;
- for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) {
+ for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) {
struct i915_priolist *p = rb_entry(rb, typeof(*p), node);
priolist_for_each_request(rq, p) {
@@ -3921,7 +3997,7 @@ void intel_execlists_show_requests(struct intel_engine_cs *engine,
show_request(m, last, "\t\t", 0);
}
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 2b6dffcc2262..14aa31879a37 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -339,9 +339,9 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
u32 head;
rq = NULL;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
rcu_read_lock();
- list_for_each_entry(pos, &engine->active.requests, sched.link) {
+ list_for_each_entry(pos, &engine->sched_engine->requests, sched.link) {
if (!__i915_request_is_complete(pos)) {
rq = pos;
break;
@@ -396,7 +396,7 @@ static void reset_rewind(struct intel_engine_cs *engine, bool stalled)
}
engine->legacy.ring->head = intel_ring_wrap(engine->legacy.ring, head);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void reset_finish(struct intel_engine_cs *engine)
@@ -408,16 +408,17 @@ static void reset_cancel(struct intel_engine_cs *engine)
struct i915_request *request;
unsigned long flags;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
/* Mark all submitted requests as skipped. */
- list_for_each_entry(request, &engine->active.requests, sched.link)
+ list_for_each_entry(request, &engine->sched_engine->requests,
+ sched.link)
i915_request_put(i915_request_mark_eio(request));
intel_engine_signal_breadcrumbs(engine);
/* Remaining _unready_ requests will be nop'ed when submitted */
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void i9xx_submit_request(struct i915_request *request)
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 32589c6625e1..bd005c1b6fd5 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -253,10 +253,10 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
del_timer_sync(&mock->hw_delay);
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
/* Mark all submitted requests as skipped. */
- list_for_each_entry(rq, &engine->active.requests, sched.link)
+ list_for_each_entry(rq, &engine->sched_engine->requests, sched.link)
i915_request_put(i915_request_mark_eio(rq));
intel_engine_signal_breadcrumbs(engine);
@@ -269,7 +269,7 @@ static void mock_reset_cancel(struct intel_engine_cs *engine)
}
INIT_LIST_HEAD(&mock->hw_queue);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void mock_reset_finish(struct intel_engine_cs *engine)
@@ -283,6 +283,7 @@ static void mock_engine_release(struct intel_engine_cs *engine)
GEM_BUG_ON(timer_pending(&mock->hw_delay));
+ i915_sched_engine_put(engine->sched_engine);
intel_breadcrumbs_free(engine->breadcrumbs);
intel_context_unpin(engine->kernel_context);
@@ -345,14 +346,18 @@ int mock_engine_init(struct intel_engine_cs *engine)
{
struct intel_context *ce;
- intel_engine_init_active(engine, ENGINE_MOCK);
+ engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK);
+ if (!engine->sched_engine)
+ return -ENOMEM;
+ engine->sched_engine->engine = engine;
+
intel_engine_init_execlists(engine);
intel_engine_init__pm(engine);
intel_engine_init_retire(engine);
engine->breadcrumbs = intel_breadcrumbs_create(NULL);
if (!engine->breadcrumbs)
- return -ENOMEM;
+ goto err_schedule;
ce = create_kernel_context(engine);
if (IS_ERR(ce))
@@ -366,6 +371,8 @@ int mock_engine_init(struct intel_engine_cs *engine)
err_breadcrumbs:
intel_breadcrumbs_free(engine->breadcrumbs);
+err_schedule:
+ i915_sched_engine_put(engine->sched_engine);
return -ENOMEM;
}
diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c
index 1f93591a8c69..f349048ccbf6 100644
--- a/drivers/gpu/drm/i915/gt/selftest_execlists.c
+++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c
@@ -43,7 +43,7 @@ static int wait_for_submit(struct intel_engine_cs *engine,
unsigned long timeout)
{
/* Ignore our own attempts to suppress excess tasklets */
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
timeout += jiffies;
do {
@@ -273,7 +273,7 @@ static int live_unlite_restore(struct intel_gt *gt, int prio)
};
/* Alternatively preempt the spinner with ce[1] */
- engine->schedule(rq[1], &attr);
+ engine->sched_engine->schedule(rq[1], &attr);
}
/* And switch back to ce[0] for good measure */
@@ -606,9 +606,9 @@ static int live_hold_reset(void *arg)
err = -EBUSY;
goto out;
}
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->sched_engine->tasklet);
- engine->execlists.tasklet.callback(&engine->execlists.tasklet);
+ engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet);
GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
i915_request_get(rq);
@@ -618,7 +618,7 @@ static int live_hold_reset(void *arg)
__intel_engine_reset_bh(engine, NULL);
GEM_BUG_ON(rq->fence.error != -EIO);
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->sched_engine->tasklet);
clear_and_wake_up_bit(I915_RESET_ENGINE + id,
>->reset.flags);
local_bh_enable();
@@ -900,7 +900,7 @@ release_queue(struct intel_engine_cs *engine,
i915_request_add(rq);
local_bh_disable();
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
local_bh_enable(); /* kick tasklet */
i915_request_put(rq);
@@ -1183,7 +1183,7 @@ static int live_timeslice_rewind(void *arg)
while (i915_request_is_active(rq[A2])) { /* semaphore yield! */
/* Wait for the timeslice to kick in */
del_timer(&engine->execlists.timer);
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
intel_engine_flush_submission(engine);
}
/* -> ELSP[] = { { A:rq1 }, { B:rq1 } } */
@@ -1325,7 +1325,7 @@ static int live_timeslice_queue(void *arg)
err = PTR_ERR(rq);
goto err_heartbeat;
}
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
err = wait_for_submit(engine, rq, HZ / 2);
if (err) {
pr_err("%s: Timed out trying to submit semaphores\n",
@@ -1867,7 +1867,7 @@ static int live_late_preempt(void *arg)
}
attr.priority = I915_PRIORITY_MAX;
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
if (!igt_wait_for_spinner(&spin_hi, rq)) {
pr_err("High priority context failed to preempt the low priority context\n");
@@ -2480,7 +2480,7 @@ static int live_suppress_self_preempt(void *arg)
i915_request_add(rq_b);
GEM_BUG_ON(i915_request_completed(rq_a));
- engine->schedule(rq_a, &attr);
+ engine->sched_engine->schedule(rq_a, &attr);
igt_spinner_end(&a.spin);
if (!igt_wait_for_spinner(&b.spin, rq_b)) {
@@ -2612,7 +2612,7 @@ static int live_chain_preempt(void *arg)
i915_request_get(rq);
i915_request_add(rq);
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
igt_spinner_end(&hi.spin);
if (i915_request_wait(rq, 0, HZ / 5) < 0) {
@@ -2971,7 +2971,7 @@ static int live_preempt_gang(void *arg)
break;
/* Submit each spinner at increasing priority */
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
} while (prio <= I915_PRIORITY_MAX &&
!__igt_timeout(end_time, NULL));
pr_debug("%s: Preempt chain of %d requests\n",
@@ -3219,7 +3219,7 @@ static int preempt_user(struct intel_engine_cs *engine,
i915_request_get(rq);
i915_request_add(rq);
- engine->schedule(rq, &attr);
+ engine->sched_engine->schedule(rq, &attr);
if (i915_request_wait(rq, 0, HZ / 2) < 0)
err = -ETIME;
@@ -4593,15 +4593,15 @@ static int reset_virtual_engine(struct intel_gt *gt,
err = -EBUSY;
goto out_heartbeat;
}
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->sched_engine->tasklet);
- engine->execlists.tasklet.callback(&engine->execlists.tasklet);
+ engine->sched_engine->tasklet.callback(&engine->sched_engine->tasklet);
GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
/* Fake a preemption event; failed of course */
- spin_lock_irq(&engine->active.lock);
+ spin_lock_irq(&engine->sched_engine->lock);
__unwind_incomplete_requests(engine);
- spin_unlock_irq(&engine->active.lock);
+ spin_unlock_irq(&engine->sched_engine->lock);
GEM_BUG_ON(rq->engine != engine);
/* Reset the engine while keeping our active request on hold */
@@ -4612,7 +4612,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
GEM_BUG_ON(rq->fence.error != -EIO);
/* Release our grasp on the engine, letting CS flow again */
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->sched_engine->tasklet);
clear_and_wake_up_bit(I915_RESET_ENGINE + engine->id, >->reset.flags);
local_bh_enable();
diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 5b63d4df8c93..cbcb800e2ca0 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -858,12 +858,12 @@ static int active_engine(void *data)
rq[idx] = i915_request_get(new);
i915_request_add(new);
- if (engine->schedule && arg->flags & TEST_PRIORITY) {
+ if (engine->sched_engine->schedule && arg->flags & TEST_PRIORITY) {
struct i915_sched_attr attr = {
.priority =
i915_prandom_u32_max_state(512, &prng),
};
- engine->schedule(rq[idx], &attr);
+ engine->sched_engine->schedule(rq[idx], &attr);
}
err = active_request_put(old);
@@ -1702,7 +1702,7 @@ static int __igt_atomic_reset_engine(struct intel_engine_cs *engine,
const struct igt_atomic_section *p,
const char *mode)
{
- struct tasklet_struct * const t = &engine->execlists.tasklet;
+ struct tasklet_struct * const t = &engine->sched_engine->tasklet;
int err;
GEM_TRACE("i915_reset_engine(%s:%s) under %s\n",
diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index d8f6623524e8..5b40def7cd9d 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -49,7 +49,7 @@ static int wait_for_submit(struct intel_engine_cs *engine,
unsigned long timeout)
{
/* Ignore our own attempts to suppress excess tasklets */
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
timeout += jiffies;
do {
@@ -1613,12 +1613,12 @@ static void garbage_reset(struct intel_engine_cs *engine,
local_bh_disable();
if (!test_and_set_bit(bit, lock)) {
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->sched_engine->tasklet);
if (!rq->fence.error)
__intel_engine_reset_bh(engine, NULL);
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->sched_engine->tasklet);
clear_and_wake_up_bit(bit, lock);
}
local_bh_enable();
diff --git a/drivers/gpu/drm/i915/gt/selftest_reset.c b/drivers/gpu/drm/i915/gt/selftest_reset.c
index 8784257ec808..7a50c9f4071b 100644
--- a/drivers/gpu/drm/i915/gt/selftest_reset.c
+++ b/drivers/gpu/drm/i915/gt/selftest_reset.c
@@ -321,7 +321,7 @@ static int igt_atomic_engine_reset(void *arg)
goto out_unlock;
for_each_engine(engine, gt, id) {
- struct tasklet_struct *t = &engine->execlists.tasklet;
+ struct tasklet_struct *t = &engine->sched_engine->tasklet;
if (t->func)
tasklet_disable(t);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 335719f17490..068e5de27e31 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -181,6 +181,7 @@ static void schedule_out(struct i915_request *rq)
static void __guc_dequeue(struct intel_engine_cs *engine)
{
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
struct intel_engine_execlists * const execlists = &engine->execlists;
struct i915_request **first = execlists->inflight;
struct i915_request ** const last_port = first + execlists->port_mask;
@@ -189,7 +190,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
bool submit = false;
struct rb_node *rb;
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
if (last) {
if (*++first)
@@ -204,7 +205,7 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
* event.
*/
port = first;
- while ((rb = rb_first_cached(&execlists->queue))) {
+ while ((rb = rb_first_cached(&sched_engine->queue))) {
struct i915_priolist *p = to_priolist(rb);
struct i915_request *rq, *rn;
@@ -224,11 +225,11 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
last = rq;
}
- rb_erase_cached(&p->node, &execlists->queue);
+ rb_erase_cached(&p->node, &sched_engine->queue);
i915_priolist_free(p);
}
done:
- execlists->queue_priority_hint =
+ sched_engine->queue_priority_hint =
rb ? to_priolist(rb)->priority : INT_MIN;
if (submit) {
*port = schedule_in(last, port - execlists->inflight);
@@ -240,13 +241,14 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
static void guc_submission_tasklet(struct tasklet_struct *t)
{
- struct intel_engine_cs * const engine =
- from_tasklet(engine, t, execlists.tasklet);
+ struct i915_sched_engine *sched_engine =
+ from_tasklet(sched_engine, t, tasklet);
+ struct intel_engine_cs * const engine = sched_engine->engine;
struct intel_engine_execlists * const execlists = &engine->execlists;
struct i915_request **port, *rq;
unsigned long flags;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
for (port = execlists->inflight; (rq = *port); port++) {
if (!i915_request_completed(rq))
@@ -262,20 +264,22 @@ static void guc_submission_tasklet(struct tasklet_struct *t)
__guc_dequeue(engine);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ i915_sched_engine_reset_on_empty(engine->sched_engine);
+
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void cs_irq_handler(struct intel_engine_cs *engine, u16 iir)
{
if (iir & GT_RENDER_USER_INTERRUPT) {
intel_engine_signal_breadcrumbs(engine);
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
}
}
static void guc_reset_prepare(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
ENGINE_TRACE(engine, "\n");
@@ -283,12 +287,12 @@ static void guc_reset_prepare(struct intel_engine_cs *engine)
* Prevent request submission to the hardware until we have
* completed the reset in i915_gem_reset_finish(). If a request
* is completed by one engine, it may then queue a request
- * to a second via its execlists->tasklet *just* as we are
+ * to a second via its sched_engine->tasklet *just* as we are
* calling engine->init_hw() and also writing the ELSP.
- * Turning off the execlists->tasklet until the reset is over
+ * Turning off the sched_engine->tasklet until the reset is over
* prevents the race.
*/
- __tasklet_disable_sync_once(&execlists->tasklet);
+ __tasklet_disable_sync_once(&sched_engine->tasklet);
}
static void guc_reset_state(struct intel_context *ce,
@@ -319,7 +323,7 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
struct i915_request *rq;
unsigned long flags;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
/* Push back any incomplete requests for replay after the reset. */
rq = execlists_unwind_incomplete_requests(execlists);
@@ -333,12 +337,12 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
guc_reset_state(rq->context, engine, rq->head, stalled);
out_unlock:
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void guc_reset_cancel(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
struct i915_request *rq, *rn;
struct rb_node *rb;
unsigned long flags;
@@ -359,16 +363,16 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
* submission's irq state, we also wish to remind ourselves that
* it is irq state.)
*/
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
/* Mark all executing requests as skipped. */
- list_for_each_entry(rq, &engine->active.requests, sched.link) {
+ list_for_each_entry(rq, &engine->sched_engine->requests, sched.link) {
i915_request_set_error_once(rq, -EIO);
i915_request_mark_complete(rq);
}
/* Flush the queued requests to the timeline list (for retiring). */
- while ((rb = rb_first_cached(&execlists->queue))) {
+ while ((rb = rb_first_cached(&sched_engine->queue))) {
struct i915_priolist *p = to_priolist(rb);
priolist_for_each_request_consume(rq, rn, p) {
@@ -378,28 +382,28 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
i915_request_mark_complete(rq);
}
- rb_erase_cached(&p->node, &execlists->queue);
+ rb_erase_cached(&p->node, &sched_engine->queue);
i915_priolist_free(p);
}
/* Remaining _unready_ requests will be nop'ed when submitted */
- execlists->queue_priority_hint = INT_MIN;
- execlists->queue = RB_ROOT_CACHED;
+ sched_engine->queue_priority_hint = INT_MIN;
+ sched_engine->queue = RB_ROOT_CACHED;
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void guc_reset_finish(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
+ struct i915_sched_engine * const sched_engine = engine->sched_engine;
- if (__tasklet_enable(&execlists->tasklet))
+ if (__tasklet_enable(&sched_engine->tasklet))
/* And kick in case we missed a new request submission. */
- tasklet_hi_schedule(&execlists->tasklet);
+ i915_sched_engine_hi_kick(sched_engine);
ENGINE_TRACE(engine, "depth->%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&sched_engine->tasklet.count));
}
/*
@@ -526,7 +530,7 @@ static inline void queue_request(struct intel_engine_cs *engine,
{
GEM_BUG_ON(!list_empty(&rq->sched.link));
list_add_tail(&rq->sched.link,
- i915_sched_lookup_priolist(engine, prio));
+ i915_sched_lookup_priolist(engine->sched_engine, prio));
set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
}
@@ -536,16 +540,16 @@ static void guc_submit_request(struct i915_request *rq)
unsigned long flags;
/* Will be called from irq-context when using foreign fences. */
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
queue_request(engine, rq, rq_prio(rq));
- GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
+ GEM_BUG_ON(i915_sched_engine_is_empty(engine->sched_engine));
GEM_BUG_ON(list_empty(&rq->sched.link));
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_engine_hi_kick(engine->sched_engine);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void sanitize_hwsp(struct intel_engine_cs *engine)
@@ -623,7 +627,7 @@ static void guc_release(struct intel_engine_cs *engine)
{
engine->sanitize = NULL; /* no longer in control, nothing to sanitize */
- tasklet_kill(&engine->execlists.tasklet);
+ tasklet_kill(&engine->sched_engine->tasklet);
intel_engine_cleanup_common(engine);
lrc_fini_wa_ctx(engine);
@@ -638,7 +642,7 @@ static void guc_default_vfuncs(struct intel_engine_cs *engine)
engine->cops = &guc_context_ops;
engine->request_alloc = guc_request_alloc;
- engine->schedule = i915_schedule;
+ engine->sched_engine->schedule = i915_schedule;
engine->reset.prepare = guc_reset_prepare;
engine->reset.rewind = guc_reset_rewind;
@@ -702,7 +706,8 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine)
*/
GEM_BUG_ON(INTEL_GEN(i915) < 11);
- tasklet_setup(&engine->execlists.tasklet, guc_submission_tasklet);
+ tasklet_setup(&engine->sched_engine->tasklet, guc_submission_tasklet);
+ engine->sched_engine->schedule = i915_schedule;
guc_default_vfuncs(engine);
guc_default_irqs(engine);
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 8b964e355cb5..dea8eb5cd3fa 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1242,7 +1242,8 @@ static void record_request(const struct i915_request *request,
static void engine_record_execlists(struct intel_engine_coredump *ee)
{
- const struct intel_engine_execlists * const el = &ee->engine->execlists;
+ const struct intel_engine_execlists * const el =
+ &ee->engine->execlists;
struct i915_request * const *port = el->active;
unsigned int n = 0;
@@ -1436,12 +1437,12 @@ capture_engine(struct intel_engine_cs *engine,
if (!ee)
return NULL;
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
rq = intel_engine_find_active_request(engine);
if (rq)
capture = intel_engine_coredump_add_request(ee, rq,
ATOMIC_MAYFAIL);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
if (!capture) {
kfree(ee);
return NULL;
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 970d8f4986bb..4c0df56e3b86 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -272,11 +272,11 @@ i915_request_active_engine(struct i915_request *rq,
* check that we have acquired the lock on the final engine.
*/
locked = READ_ONCE(rq->engine);
- spin_lock_irq(&locked->active.lock);
+ spin_lock_irq(&locked->sched_engine->lock);
while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
- spin_unlock(&locked->active.lock);
+ spin_unlock(&locked->sched_engine->lock);
locked = engine;
- spin_lock(&locked->active.lock);
+ spin_lock(&locked->sched_engine->lock);
}
if (i915_request_is_active(rq)) {
@@ -285,7 +285,7 @@ i915_request_active_engine(struct i915_request *rq,
ret = true;
}
- spin_unlock_irq(&locked->active.lock);
+ spin_unlock_irq(&locked->sched_engine->lock);
return ret;
}
@@ -302,10 +302,10 @@ static void remove_from_engine(struct i915_request *rq)
* check that the rq still belongs to the newly locked engine.
*/
locked = READ_ONCE(rq->engine);
- spin_lock_irq(&locked->active.lock);
+ spin_lock_irq(&locked->sched_engine->lock);
while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
- spin_unlock(&locked->active.lock);
- spin_lock(&engine->active.lock);
+ spin_unlock(&locked->sched_engine->lock);
+ spin_lock(&engine->sched_engine->lock);
locked = engine;
}
list_del_init(&rq->sched.link);
@@ -316,7 +316,7 @@ static void remove_from_engine(struct i915_request *rq)
/* Prevent further __await_execution() registering a cb, then flush */
set_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags);
- spin_unlock_irq(&locked->active.lock);
+ spin_unlock_irq(&locked->sched_engine->lock);
__notify_execute_cb_imm(rq);
}
@@ -481,7 +481,7 @@ static bool __request_in_flight(const struct i915_request *signal)
* may either perform a context switch to the second inflight execlists,
* or it may switch to the pending set of execlists. In the case of the
* latter, it may send the ACK and we process the event copying the
- * pending[] over top of inflight[], _overwriting_ our *active. Since
+ * pending[] over top of inflight[], _overwriting_ our *active-> Since
* this implies the HW is arbitrating and not struck in *active, we do
* not worry about complete accuracy, but we do require no read/write
* tearing of the pointer [the read of the pointer must be valid, even
@@ -490,7 +490,7 @@ static bool __request_in_flight(const struct i915_request *signal)
*
* Note that the read of *execlists->active may race with the promotion
* of execlists->pending[] to execlists->inflight[], overwritting
- * the value at *execlists->active. This is fine. The promotion implies
+ * the value at *execlists->active-> This is fine. The promotion implies
* that we received an ACK from the HW, and so the context is not
* stuck -- if we do not see ourselves in *active, the inflight status
* is valid. If instead we see ourselves being copied into *active,
@@ -545,7 +545,7 @@ __await_execution(struct i915_request *rq,
/*
* Register the callback first, then see if the signaler is already
- * active. This ensures that if we race with the
+ * active-> This ensures that if we race with the
* __notify_execute_cb from i915_request_submit() and we are not
* included in that list, we get a second bite of the cherry and
* execute it ourselves. After this point, a future
@@ -637,7 +637,7 @@ bool __i915_request_submit(struct i915_request *request)
RQ_TRACE(request, "\n");
GEM_BUG_ON(!irqs_disabled());
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
/*
* With the advent of preempt-to-busy, we frequently encounter
@@ -649,9 +649,9 @@ bool __i915_request_submit(struct i915_request *request)
*
* We must remove the request from the caller's priority queue,
* and the caller must only call us when the request is in their
- * priority queue, under the active.lock. This ensures that the
+ * priority queue, under the active->lock. This ensures that the
* request has *not* yet been retired and we can safely move
- * the request into the engine->active.list where it will be
+ * the request into the engine->sched_engine->list where it will be
* dropped upon retiring. (Otherwise if resubmit a *retired*
* request, this would be a horrible use-after-free.)
*/
@@ -694,7 +694,7 @@ bool __i915_request_submit(struct i915_request *request)
result = true;
GEM_BUG_ON(test_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags));
- list_move_tail(&request->sched.link, &engine->active.requests);
+ list_move_tail(&request->sched.link, &engine->sched_engine->requests);
active:
clear_bit(I915_FENCE_FLAG_PQUEUE, &request->fence.flags);
set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags);
@@ -724,11 +724,11 @@ 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->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
__i915_request_submit(request);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
void __i915_request_unsubmit(struct i915_request *request)
@@ -742,7 +742,7 @@ void __i915_request_unsubmit(struct i915_request *request)
RQ_TRACE(request, "\n");
GEM_BUG_ON(!irqs_disabled());
- lockdep_assert_held(&engine->active.lock);
+ lockdep_assert_held(&engine->sched_engine->lock);
/*
* Before we remove this breadcrumb from the signal list, we have
@@ -775,11 +775,11 @@ 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->active.lock, flags);
+ spin_lock_irqsave(&engine->sched_engine->lock, flags);
__i915_request_unsubmit(request);
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
}
static void __cancel_request(struct i915_request *rq)
@@ -1343,7 +1343,7 @@ __i915_request_await_execution(struct i915_request *to,
}
/* Couple the dependency tree for PI on this exposed to->fence */
- if (to->engine->schedule) {
+ if (to->engine->sched_engine->schedule) {
err = i915_sched_node_add_dependency(&to->sched,
&from->sched,
I915_DEPENDENCY_WEAK);
@@ -1484,7 +1484,7 @@ i915_request_await_request(struct i915_request *to, struct i915_request *from)
return 0;
}
- if (to->engine->schedule) {
+ if (to->engine->sched_engine->schedule) {
ret = i915_sched_node_add_dependency(&to->sched,
&from->sched,
I915_DEPENDENCY_EXTERNAL);
@@ -1671,7 +1671,7 @@ __i915_request_add_to_timeline(struct i915_request *rq)
__i915_sw_fence_await_dma_fence(&rq->submit,
&prev->fence,
&rq->dmaq);
- if (rq->engine->schedule)
+ if (rq->engine->sched_engine->schedule)
__i915_sched_node_add_dependency(&rq->sched,
&prev->sched,
&rq->dep,
@@ -1743,8 +1743,8 @@ void __i915_request_queue(struct i915_request *rq,
* decide whether to preempt the entire chain so that it is ready to
* run at the earliest possible convenience.
*/
- if (attr && rq->engine->schedule)
- rq->engine->schedule(rq, attr);
+ if (attr && rq->engine->sched_engine->schedule)
+ rq->engine->sched_engine->schedule(rq, attr);
local_bh_disable();
__i915_request_queue_bh(rq);
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index 270f6cd37650..239964bec1fa 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -613,7 +613,7 @@ i915_request_active_timeline(const struct i915_request *rq)
* this submission.
*/
return rcu_dereference_protected(rq->timeline,
- lockdep_is_held(&rq->engine->active.lock));
+ lockdep_is_held(&rq->engine->sched_engine->lock));
}
static inline u32
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index efa638c3acc7..28d403a8d7d2 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -40,7 +40,7 @@ static inline struct i915_priolist *to_priolist(struct rb_node *rb)
return rb_entry(rb, struct i915_priolist, node);
}
-static void assert_priolists(struct intel_engine_execlists * const execlists)
+static void assert_priolists(struct i915_sched_engine * const sched_engine)
{
struct rb_node *rb;
long last_prio;
@@ -48,11 +48,11 @@ static void assert_priolists(struct intel_engine_execlists * const execlists)
if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
return;
- GEM_BUG_ON(rb_first_cached(&execlists->queue) !=
- rb_first(&execlists->queue.rb_root));
+ GEM_BUG_ON(rb_first_cached(&sched_engine->queue) !=
+ rb_first(&sched_engine->queue.rb_root));
last_prio = INT_MAX;
- for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) {
+ for (rb = rb_first_cached(&sched_engine->queue); rb; rb = rb_next(rb)) {
const struct i915_priolist *p = to_priolist(rb);
GEM_BUG_ON(p->priority > last_prio);
@@ -61,23 +61,22 @@ static void assert_priolists(struct intel_engine_execlists * const execlists)
}
struct list_head *
-i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
+i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
struct i915_priolist *p;
struct rb_node **parent, *rb;
bool first = true;
- lockdep_assert_held(&engine->active.lock);
- assert_priolists(execlists);
+ lockdep_assert_held(&sched_engine->lock);
+ assert_priolists(sched_engine);
- if (unlikely(execlists->no_priolist))
+ if (unlikely(sched_engine->no_priolist))
prio = I915_PRIORITY_NORMAL;
find_priolist:
/* most positive priority is scheduled first, equal priorities fifo */
rb = NULL;
- parent = &execlists->queue.rb_root.rb_node;
+ parent = &sched_engine->queue.rb_root.rb_node;
while (*parent) {
rb = *parent;
p = to_priolist(rb);
@@ -92,7 +91,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
}
if (prio == I915_PRIORITY_NORMAL) {
- p = &execlists->default_priolist;
+ p = &sched_engine->default_priolist;
} else {
p = kmem_cache_alloc(global.slab_priorities, GFP_ATOMIC);
/* Convert an allocation failure to a priority bump */
@@ -107,7 +106,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
* requests, so if userspace lied about their
* dependencies that reordering may be visible.
*/
- execlists->no_priolist = true;
+ sched_engine->no_priolist = true;
goto find_priolist;
}
}
@@ -116,7 +115,7 @@ i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio)
INIT_LIST_HEAD(&p->requests);
rb_link_node(&p->node, rb, parent);
- rb_insert_color_cached(&p->node, &execlists->queue, first);
+ rb_insert_color_cached(&p->node, &sched_engine->queue, first);
return &p->requests;
}
@@ -130,13 +129,13 @@ struct sched_cache {
struct list_head *priolist;
};
-static struct intel_engine_cs *
-sched_lock_engine(const struct i915_sched_node *node,
- struct intel_engine_cs *locked,
+static struct i915_sched_engine *
+lock_sched_engine(struct i915_sched_node *node,
+ struct i915_sched_engine *locked,
struct sched_cache *cache)
{
const struct i915_request *rq = node_to_request(node);
- struct intel_engine_cs *engine;
+ struct i915_sched_engine *sched_engine;
GEM_BUG_ON(!locked);
@@ -146,81 +145,22 @@ sched_lock_engine(const struct i915_sched_node *node,
* engine lock. The simple ploy we use is to take the lock then
* check that the rq still belongs to the newly locked engine.
*/
- while (locked != (engine = READ_ONCE(rq->engine))) {
- spin_unlock(&locked->active.lock);
+ while (locked != (sched_engine = rq->engine->sched_engine)) {
+ spin_unlock(&locked->lock);
memset(cache, 0, sizeof(*cache));
- spin_lock(&engine->active.lock);
- locked = engine;
+ spin_lock(&sched_engine->lock);
+ locked = sched_engine;
}
- GEM_BUG_ON(locked != engine);
+ GEM_BUG_ON(locked != sched_engine);
return locked;
}
-static inline int rq_prio(const struct i915_request *rq)
-{
- return rq->sched.attr.priority;
-}
-
-static inline bool need_preempt(int prio, int active)
-{
- /*
- * Allow preemption of low -> normal -> high, but we do
- * not allow low priority tasks to preempt other low priority
- * tasks under the impression that latency for low priority
- * tasks does not matter (as much as background throughput),
- * so kiss.
- */
- return prio >= max(I915_PRIORITY_NORMAL, active);
-}
-
-static void kick_submission(struct intel_engine_cs *engine,
- const struct i915_request *rq,
- int prio)
-{
- const struct i915_request *inflight;
-
- /*
- * We only need to kick the tasklet once for the high priority
- * new context we add into the queue.
- */
- if (prio <= engine->execlists.queue_priority_hint)
- return;
-
- rcu_read_lock();
-
- /* Nothing currently active? We're overdue for a submission! */
- inflight = execlists_active(&engine->execlists);
- if (!inflight)
- goto unlock;
-
- /*
- * If we are already the currently executing context, don't
- * bother evaluating if we should preempt ourselves.
- */
- if (inflight->context == rq->context)
- goto unlock;
-
- ENGINE_TRACE(engine,
- "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
- prio,
- rq->fence.context, rq->fence.seqno,
- inflight->fence.context, inflight->fence.seqno,
- inflight->sched.attr.priority);
-
- engine->execlists.queue_priority_hint = prio;
- if (need_preempt(prio, rq_prio(inflight)))
- tasklet_hi_schedule(&engine->execlists.tasklet);
-
-unlock:
- rcu_read_unlock();
-}
-
static void __i915_schedule(struct i915_sched_node *node,
const struct i915_sched_attr *attr)
{
const int prio = max(attr->priority, node->attr.priority);
- struct intel_engine_cs *engine;
+ struct i915_sched_engine *sched_engine;
struct i915_dependency *dep, *p;
struct i915_dependency stack;
struct sched_cache cache;
@@ -295,23 +235,24 @@ static void __i915_schedule(struct i915_sched_node *node,
}
memset(&cache, 0, sizeof(cache));
- engine = node_to_request(node)->engine;
- spin_lock(&engine->active.lock);
+ sched_engine = node_to_request(node)->engine->sched_engine;
+ spin_lock(&sched_engine->lock);
/* Fifo and depth-first replacement ensure our deps execute before us */
- engine = sched_lock_engine(node, engine, &cache);
+ sched_engine = lock_sched_engine(node, sched_engine, &cache);
list_for_each_entry_safe_reverse(dep, p, &dfs, dfs_link) {
INIT_LIST_HEAD(&dep->dfs_link);
node = dep->signaler;
- engine = sched_lock_engine(node, engine, &cache);
- lockdep_assert_held(&engine->active.lock);
+ sched_engine = lock_sched_engine(node, sched_engine, &cache);
+ lockdep_assert_held(&sched_engine->lock);
/* Recheck after acquiring the engine->timeline.lock */
if (prio <= node->attr.priority || node_signaled(node))
continue;
- GEM_BUG_ON(node_to_request(node)->engine != engine);
+ GEM_BUG_ON(node_to_request(node)->engine->sched_engine !=
+ sched_engine);
WRITE_ONCE(node->attr.priority, prio);
@@ -329,16 +270,17 @@ static void __i915_schedule(struct i915_sched_node *node,
if (i915_request_in_priority_queue(node_to_request(node))) {
if (!cache.priolist)
cache.priolist =
- i915_sched_lookup_priolist(engine,
+ i915_sched_lookup_priolist(sched_engine,
prio);
list_move_tail(&node->link, cache.priolist);
}
/* Defer (tasklet) submission until after all of our updates. */
- kick_submission(engine, node_to_request(node), prio);
+ if (sched_engine->kick_backend)
+ sched_engine->kick_backend(node_to_request(node), prio);
}
- spin_unlock(&engine->active.lock);
+ spin_unlock(&sched_engine->lock);
}
void i915_schedule(struct i915_request *rq, const struct i915_sched_attr *attr)
@@ -489,6 +431,50 @@ void i915_request_show_with_schedule(struct drm_printer *m,
rcu_read_unlock();
}
+void i915_sched_engine_free(struct kref *kref)
+{
+ struct i915_sched_engine *sched_engine =
+ container_of(kref, typeof(*sched_engine), ref);
+
+ i915_sched_engine_kill(sched_engine); /* flush the callback */
+ kfree(sched_engine);
+}
+
+struct i915_sched_engine *
+i915_sched_engine_create(unsigned int subclass)
+{
+ struct i915_sched_engine *sched_engine;
+
+ sched_engine = kzalloc(sizeof(*sched_engine), GFP_KERNEL);
+ if (!sched_engine)
+ return NULL;
+
+ kref_init(&sched_engine->ref);
+
+ sched_engine->queue = RB_ROOT_CACHED;
+ sched_engine->queue_priority_hint = INT_MIN;
+
+ INIT_LIST_HEAD(&sched_engine->requests);
+ INIT_LIST_HEAD(&sched_engine->hold);
+
+ spin_lock_init(&sched_engine->lock);
+ lockdep_set_subclass(&sched_engine->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(&sched_engine->lock.dep_map);
+ lock_map_release(&sched_engine->lock.dep_map);
+ local_irq_enable();
+#endif
+
+ return sched_engine;
+}
+
static void i915_global_scheduler_shrink(void)
{
kmem_cache_shrink(global.slab_dependencies);
diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
index 858a0938f47a..a78b1f50ecb4 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.h
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -39,7 +39,7 @@ void i915_schedule(struct i915_request *request,
const struct i915_sched_attr *attr);
struct list_head *
-i915_sched_lookup_priolist(struct intel_engine_cs *engine, int prio);
+i915_sched_lookup_priolist(struct i915_sched_engine *sched_engine, int prio);
void __i915_priolist_free(struct i915_priolist *p);
static inline void i915_priolist_free(struct i915_priolist *p)
@@ -53,4 +53,67 @@ void i915_request_show_with_schedule(struct drm_printer *m,
const char *prefix,
int indent);
+struct i915_sched_engine *
+i915_sched_engine_create(unsigned int subclass);
+
+void i915_sched_engine_free(struct kref *kref);
+
+static inline struct i915_sched_engine *
+i915_sched_engine_get(struct i915_sched_engine *sched_engine)
+{
+ kref_get(&sched_engine->ref);
+ return sched_engine;
+}
+
+static inline void
+i915_sched_engine_put(struct i915_sched_engine *sched_engine)
+{
+ kref_put(&sched_engine->ref, i915_sched_engine_free);
+}
+
+static inline bool
+i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
+{
+ return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
+}
+
+static inline void
+i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine)
+{
+ if (i915_sched_engine_is_empty(sched_engine))
+ sched_engine->no_priolist = false;
+}
+
+static inline void
+i915_sched_engine_hi_kick(struct i915_sched_engine *sched_engine)
+{
+ tasklet_hi_schedule(&sched_engine->tasklet);
+}
+
+static inline void
+i915_sched_engine_kick(struct i915_sched_engine *sched_engine)
+{
+ tasklet_schedule(&sched_engine->tasklet);
+}
+
+static inline void
+i915_sched_engine_kill(struct i915_sched_engine *sched_engine)
+{
+ tasklet_kill(&sched_engine->tasklet);
+}
+
+static inline void
+sched_engine_active_lock_bh(struct i915_sched_engine *sched_engine)
+{
+ local_bh_disable(); /* prevent local softirq and lock recursion */
+ tasklet_lock(&sched_engine->tasklet);
+}
+
+static inline void
+sched_engine_active_unlock_bh(struct i915_sched_engine *sched_engine)
+{
+ tasklet_unlock(&sched_engine->tasklet);
+ local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
+}
+
#endif /* _I915_SCHEDULER_H_ */
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 343ed44d5ed4..90b389ba661b 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -91,4 +91,67 @@ struct i915_dependency {
&(rq__)->sched.signalers_list, \
signal_link)
+struct i915_sched_engine {
+ struct kref ref;
+
+ /*
+ * @lock: Protects requests in priority lists, requests, hold, and
+ * tasklet while running.
+ */
+ spinlock_t lock;
+
+ /* Execlist specific lists, needed here as protected by lock */
+ struct list_head requests;
+ struct list_head hold; /* ready requests, but on hold */
+
+ /**
+ * @tasklet: softirq tasklet for bottom handler
+ */
+ struct tasklet_struct tasklet;
+
+ /**
+ * @default_priolist: priority list for I915_PRIORITY_NORMAL
+ */
+ struct i915_priolist default_priolist;
+
+ /**
+ * @queue_priority_hint: Highest pending priority.
+ *
+ * When we add requests into the queue, or adjust the priority of
+ * executing requests, we compute the maximum priority of those
+ * pending requests. We can then use this value to determine if
+ * we need to preempt the executing requests to service the queue.
+ * However, since the we may have recorded the priority of an inflight
+ * request we wanted to preempt but since completed, at the time of
+ * dequeuing the priority hint may no longer may match the highest
+ * available request priority.
+ */
+ int queue_priority_hint;
+
+ /**
+ * @queue: queue of requests, in priority lists
+ */
+ struct rb_root_cached queue;
+
+ /**
+ * @no_priolist: priority lists disabled
+ */
+ bool no_priolist;
+
+ /* Back pointer to engine */
+ struct intel_engine_cs *engine;
+
+ /* Kick backend */
+ void (*kick_backend)(const struct i915_request *rq,
+ int prio);
+
+ /*
+ * Call when the priority on a request has changed and it and its
+ * dependencies may need rescheduling. Note the request itself may
+ * not be ready to run!
+ */
+ void (*schedule)(struct i915_request *request,
+ const struct i915_sched_attr *attr);
+};
+
#endif /* _I915_SCHEDULER_TYPES_H_ */
--
2.28.0
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