[PATCH 33/58] drm/i915: Move tasklet from execlists to sched
Chris Wilson
chris at chris-wilson.co.uk
Wed Jan 6 11:28:19 UTC 2021
Move the scheduling tasklists out of the execlists backend into the
per-engine scheduling bookkeeping.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine.h | 14 ----
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 11 ++--
drivers/gpu/drm/i915/gt/intel_engine_types.h | 5 --
.../drm/i915/gt/intel_execlists_submission.c | 64 +++++++++----------
drivers/gpu/drm/i915/gt/intel_gt_irq.c | 2 +-
drivers/gpu/drm/i915/gt/selftest_execlists.c | 16 ++---
drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 2 +-
drivers/gpu/drm/i915/gt/selftest_lrc.c | 6 +-
drivers/gpu/drm/i915/gt/selftest_reset.c | 6 +-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 14 ++--
drivers/gpu/drm/i915/i915_scheduler.c | 14 ++--
drivers/gpu/drm/i915/i915_scheduler.h | 20 ++++++
drivers/gpu/drm/i915/i915_scheduler_types.h | 6 ++
.../gpu/drm/i915/selftests/i915_scheduler.c | 16 ++---
14 files changed, 99 insertions(+), 97 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index 20974415e7d8..801ae54cf60d 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -122,20 +122,6 @@ 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! */
-}
-
static inline u32
intel_read_status_page(const struct intel_engine_cs *engine, int reg)
{
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index db17d9fe3333..eb429a90518e 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -915,7 +915,6 @@ int intel_engines_init(struct intel_gt *gt)
void intel_engine_cleanup_common(struct intel_engine_cs *engine)
{
i915_sched_fini_engine(&engine->active);
- tasklet_kill(&engine->execlists.tasklet); /* flush the callback */
intel_breadcrumbs_free(engine->breadcrumbs);
@@ -1189,7 +1188,7 @@ 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->active.tasklet;
if (!t->func)
return;
@@ -1454,8 +1453,8 @@ 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)),
+ &engine->active.tasklet.state)),
+ enableddisabled(!atomic_read(&engine->active.tasklet.count)),
repr_timer(&engine->execlists.preempt),
repr_timer(&engine->execlists.timer));
@@ -1479,7 +1478,7 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
idx, hws[idx * 2], hws[idx * 2 + 1]);
}
- execlists_active_lock_bh(execlists);
+ i915_sched_lock_bh(&engine->active);
rcu_read_lock();
for (port = execlists->active; (rq = *port); port++) {
char hdr[160];
@@ -1510,7 +1509,7 @@ 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);
+ i915_sched_unlock_bh(&engine->active);
} else if (INTEL_GEN(dev_priv) > 6) {
drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
ENGINE_READ(engine, RING_PP_DIR_BASE));
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index a785f6558e48..adb156e45325 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -139,11 +139,6 @@ 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
*/
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index e27b3be3f474..583fb96e8ac3 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -525,7 +525,7 @@ 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_kick(&ve->base.active);
}
static inline void __execlists_schedule_out(struct i915_request *rq)
@@ -695,9 +695,9 @@ trace_ports(const struct intel_engine_execlists *execlists,
}
static inline 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->active.tasklet));
}
static __maybe_unused bool
@@ -714,7 +714,7 @@ assert_pending_valid(const struct intel_engine_execlists *execlists,
trace_ports(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]) {
@@ -1084,7 +1084,7 @@ static void start_timeslice(struct intel_engine_cs *engine)
if (needs_timeslice(engine, *el->active)) {
if (el->timer.expires) {
if (!timer_pending(&el->timer))
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_kick(&engine->active);
return;
}
@@ -1646,8 +1646,8 @@ 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->active.tasklet) &&
+ !reset_in_progress(engine));
GEM_BUG_ON(!intel_engine_in_execlists_submission_mode(engine));
/*
@@ -2021,13 +2021,13 @@ 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->active.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->active.tasklet);
clear_and_wake_up_bit(bit, lock);
}
@@ -2091,8 +2091,10 @@ static void execlists_submission_tasklet(unsigned long data)
static void __execlists_kick(struct intel_engine_execlists *execlists)
{
- /* Kick the tasklet for some interrupt coalescing and reset handling */
- tasklet_hi_schedule(&execlists->tasklet);
+ struct intel_engine_cs *engine =
+ container_of(execlists, typeof(*engine), execlists);
+
+ i915_sched_kick(&engine->active);
}
#define execlists_kick(t, member) \
@@ -2403,10 +2405,8 @@ 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;
-
ENGINE_TRACE(engine, "depth<-%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&engine->active.tasklet.count));
/*
* Prevent request submission to the hardware until we have
@@ -2417,8 +2417,8 @@ 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(&engine->active.tasklet);
+ GEM_BUG_ON(!reset_in_progress(engine));
/*
* We stop engines, otherwise we might get failed reset and a
@@ -2652,8 +2652,8 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
execlists->queue_priority_hint = INT_MIN;
engine->active.queue = RB_ROOT_CACHED;
- GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
- execlists->tasklet.func = nop_submission_tasklet;
+ GEM_BUG_ON(__tasklet_is_enabled(&engine->active.tasklet));
+ engine->active.tasklet.func = nop_submission_tasklet;
spin_unlock_irqrestore(&engine->active.lock, flags);
rcu_read_unlock();
@@ -2661,8 +2661,6 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
static void execlists_reset_finish(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
-
/*
* After a GPU reset, we may have requests to replay. Do so now while
* we still have the forcewake to be sure that the GPU is not allowed
@@ -2673,14 +2671,14 @@ 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(&engine->active.tasklet))
+ i915_sched_kick(&engine->active);
ENGINE_TRACE(engine, "depth->%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&engine->active.tasklet.count));
}
static void gen8_logical_ring_enable_irq(struct intel_engine_cs *engine)
@@ -2713,7 +2711,7 @@ static bool can_preempt(struct intel_engine_cs *engine)
void intel_execlists_set_default_submission(struct intel_engine_cs *engine)
{
engine->submit_request = i915_request_enqueue;
- engine->execlists.tasklet.func = execlists_submission_tasklet;
+ engine->active.tasklet.func = execlists_submission_tasklet;
engine->reset.prepare = execlists_reset_prepare;
engine->reset.rewind = execlists_reset_rewind;
@@ -2748,7 +2746,7 @@ 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);
+ tasklet_kill(&engine->active.tasklet);
}
static void execlists_release(struct intel_engine_cs *engine)
@@ -2841,7 +2839,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
struct intel_uncore *uncore = engine->uncore;
u32 base = engine->mmio_base;
- tasklet_init(&engine->execlists.tasklet,
+ tasklet_init(&engine->active.tasklet,
execlists_submission_tasklet, (unsigned long)engine);
timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
@@ -2930,7 +2928,7 @@ 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);
+ tasklet_kill(&ve->base.active.tasklet);
/* Decouple ourselves from the siblings, no more access allowed. */
for (n = 0; n < ve->num_siblings; n++) {
@@ -2948,7 +2946,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
spin_unlock_irq(&sibling->active.lock);
}
- GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet));
+ GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.active.tasklet));
GEM_BUG_ON(!list_empty(virtual_queue(ve)));
lrc_fini(&ve->context);
@@ -3162,7 +3160,7 @@ static void virtual_submission_tasklet(unsigned long data)
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);
+ i915_sched_kick(&sibling->active);
unlock_engine:
spin_unlock_irq(&sibling->active.lock);
@@ -3203,7 +3201,7 @@ static void virtual_submit_request(struct i915_request *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_kick(&ve->base.active);
unlock:
spin_unlock_irqrestore(&ve->base.active.lock, flags);
@@ -3301,7 +3299,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
INIT_LIST_HEAD(virtual_queue(ve));
ve->base.execlists.queue_priority_hint = INT_MIN;
- tasklet_init(&ve->base.execlists.tasklet,
+ tasklet_init(&ve->base.active.tasklet,
virtual_submission_tasklet,
(unsigned long)ve);
@@ -3331,7 +3329,7 @@ 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.func !=
+ if (sibling->active.tasklet.func !=
execlists_submission_tasklet) {
err = -ENODEV;
goto err_put;
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
index 9830342aa6f4..2106fb403c3e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -60,7 +60,7 @@ cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
}
if (tasklet)
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_kick(&engine->active);
}
static u32
diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm/i915/gt/selftest_execlists.c
index 530c5ac9031c..f2c676cbdb6a 100644
--- a/drivers/gpu/drm/i915/gt/selftest_execlists.c
+++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c
@@ -44,7 +44,7 @@ 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_kick(&engine->active);
timeout += jiffies;
do {
@@ -603,9 +603,9 @@ static int live_hold_reset(void *arg)
err = -EBUSY;
goto out;
}
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
- engine->execlists.tasklet.func(engine->execlists.tasklet.data);
+ engine->active.tasklet.func(engine->active.tasklet.data);
GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
i915_request_get(rq);
@@ -615,7 +615,7 @@ 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->active.tasklet);
clear_and_wake_up_bit(I915_RESET_ENGINE + id,
>->reset.flags);
local_bh_enable();
@@ -1177,7 +1177,7 @@ 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_kick(&engine->active);
intel_engine_flush_submission(engine);
}
/* -> ELSP[] = { { A:rq1 }, { B:rq1 } } */
@@ -4574,9 +4574,9 @@ static int reset_virtual_engine(struct intel_gt *gt,
err = -EBUSY;
goto out_heartbeat;
}
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
- engine->execlists.tasklet.func(engine->execlists.tasklet.data);
+ engine->active.tasklet.func(engine->active.tasklet.data);
GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
/* Fake a preemption event; failed of course */
@@ -4593,7 +4593,7 @@ 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->active.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 927d54c702f4..cc0120411d62 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -1568,7 +1568,7 @@ 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->active.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 01c63e898e1b..d2efcaef31fe 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_kick(&engine->active);
timeout += jiffies;
do {
@@ -1609,12 +1609,12 @@ 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->active.tasklet);
if (!rq->fence.error)
__intel_engine_reset_bh(engine, NULL);
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.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 b7befcfbdcde..428e522fc50a 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) {
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
intel_engine_pm_get(engine);
for (p = igt_atomic_phases; p->name; p++) {
@@ -345,8 +345,8 @@ static int igt_atomic_engine_reset(void *arg)
}
intel_engine_pm_put(engine);
- tasklet_enable(&engine->execlists.tasklet);
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.tasklet);
+ tasklet_hi_schedule(&engine->active.tasklet);
if (err)
break;
}
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 6d97b5ad09b5..b9cb6807d101 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -372,8 +372,6 @@ static void guc_submission_tasklet(unsigned long data)
static void guc_reset_prepare(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
-
ENGINE_TRACE(engine, "\n");
/*
@@ -385,7 +383,7 @@ static void guc_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);
+ __tasklet_disable_sync_once(&engine->active.tasklet);
}
static void
@@ -508,14 +506,12 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
static void guc_reset_finish(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
-
- if (__tasklet_enable(&execlists->tasklet))
+ if (__tasklet_enable(&engine->active.tasklet))
/* And kick in case we missed a new request submission. */
- tasklet_hi_schedule(&execlists->tasklet);
+ tasklet_hi_schedule(&engine->active.tasklet);
ENGINE_TRACE(engine, "depth->%d\n",
- atomic_read(&execlists->tasklet.count));
+ atomic_read(&engine->active.tasklet.count));
}
/*
@@ -613,7 +609,7 @@ static void guc_set_default_submission(struct intel_engine_cs *engine)
*/
intel_execlists_set_default_submission(engine);
- engine->execlists.tasklet.func = guc_submission_tasklet;
+ engine->active.tasklet.func = guc_submission_tasklet;
/* do not use execlists park/unpark */
engine->park = engine->unpark = NULL;
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index 8e4fd65d040f..75909f6d0f53 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -125,6 +125,7 @@ void i915_sched_park_engine(struct i915_sched_engine *se)
void i915_sched_fini_engine(struct i915_sched_engine *se)
{
GEM_BUG_ON(!list_empty(&se->requests));
+ tasklet_kill(&se->tasklet); /* flush the callback */
}
static void __ipi_add(struct i915_request *rq)
@@ -339,7 +340,7 @@ static void kick_submission(struct intel_engine_cs *engine,
engine->execlists.queue_priority_hint = prio;
if (need_preempt(prio, rq_prio(inflight)))
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_kick(&engine->active);
}
static void ipi_priority(struct i915_request *rq, int prio)
@@ -621,16 +622,17 @@ static bool ancestor_on_hold(const struct intel_engine_cs *engine,
void i915_request_enqueue(struct i915_request *rq)
{
struct intel_engine_cs *engine = rq->engine;
+ struct i915_sched_engine *se = &engine->active;
unsigned long flags;
bool kick = false;
/* Will be called from irq-context when using foreign fences. */
- spin_lock_irqsave(&engine->active.lock, flags);
+ spin_lock_irqsave(&se->lock, flags);
GEM_BUG_ON(test_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags));
if (unlikely(ancestor_on_hold(engine, rq))) {
RQ_TRACE(rq, "ancestor on hold\n");
- list_add_tail(&rq->sched.link, &engine->active.hold);
+ list_add_tail(&rq->sched.link, &se->hold);
i915_request_set_hold(rq);
} else {
queue_request(engine, rq);
@@ -641,9 +643,9 @@ void i915_request_enqueue(struct i915_request *rq)
}
GEM_BUG_ON(list_empty(&rq->sched.link));
- spin_unlock_irqrestore(&engine->active.lock, flags);
+ spin_unlock_irqrestore(&se->lock, flags);
if (kick)
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_kick(se);
}
struct i915_request *
@@ -771,7 +773,7 @@ void __intel_engine_resume_request(struct intel_engine_cs *engine,
if (rq_prio(rq) > engine->execlists.queue_priority_hint) {
engine->execlists.queue_priority_hint = rq_prio(rq);
- tasklet_hi_schedule(&engine->execlists.tasklet);
+ i915_sched_kick(&engine->active);
}
/*
diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h
index e89bf5ed61b3..0ab47cbf0e9c 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.h
+++ b/drivers/gpu/drm/i915/i915_scheduler.h
@@ -79,6 +79,26 @@ i915_sched_is_last_request(const struct i915_sched_engine *se,
return list_is_last_rcu(&rq->sched.link, &se->requests);
}
+static inline void
+i915_sched_lock_bh(struct i915_sched_engine *se)
+{
+ local_bh_disable(); /* prevent local softirq and lock recursion */
+ tasklet_lock(&se->tasklet);
+}
+
+static inline void
+i915_sched_unlock_bh(struct i915_sched_engine *se)
+{
+ tasklet_unlock(&se->tasklet);
+ local_bh_enable(); /* restore softirq, and kick ksoftirqd! */
+}
+
+static inline void i915_sched_kick(struct i915_sched_engine *se)
+{
+ /* Kick the tasklet for some interrupt coalescing and reset handling */
+ tasklet_hi_schedule(&se->tasklet);
+}
+
void i915_request_show_with_schedule(struct drm_printer *m,
const struct i915_request *rq,
const char *prefix,
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 1a4cf7e52186..92332fb71b14 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -7,6 +7,7 @@
#ifndef _I915_SCHEDULER_TYPES_H_
#define _I915_SCHEDULER_TYPES_H_
+#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/workqueue.h>
@@ -101,6 +102,11 @@ struct i915_sched_engine {
* @no_priolist: priority lists disabled
*/
bool no_priolist;
+
+ /**
+ * @tasklet: softirq tasklet for bottom half
+ */
+ struct tasklet_struct tasklet;
};
struct i915_dependency {
diff --git a/drivers/gpu/drm/i915/selftests/i915_scheduler.c b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
index 5c5b574af253..5b1dd227e24e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/selftests/i915_scheduler.c
@@ -172,12 +172,12 @@ static int __single_chain(struct intel_engine_cs *engine, unsigned long length,
}
intel_engine_flush_submission(engine);
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
local_bh_disable();
if (fn(rq, count, count - 1) && !check_context_order(engine))
err = -EINVAL;
local_bh_enable();
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.tasklet);
igt_spinner_end(&spin);
err_context:
@@ -258,12 +258,12 @@ static int __wide_chain(struct intel_engine_cs *engine, unsigned long width,
}
intel_engine_flush_submission(engine);
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
local_bh_disable();
if (fn(rq[i - 1], i, count) && !check_context_order(engine))
err = -EINVAL;
local_bh_enable();
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.tasklet);
igt_spinner_end(&spin);
err_free:
@@ -348,12 +348,12 @@ static int __inv_chain(struct intel_engine_cs *engine, unsigned long width,
}
intel_engine_flush_submission(engine);
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
local_bh_disable();
if (fn(rq[i - 1], i, count) && !check_context_order(engine))
err = -EINVAL;
local_bh_enable();
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.tasklet);
igt_spinner_end(&spin);
err_free:
@@ -455,12 +455,12 @@ static int __sparse_chain(struct intel_engine_cs *engine, unsigned long width,
}
intel_engine_flush_submission(engine);
- tasklet_disable(&engine->execlists.tasklet);
+ tasklet_disable(&engine->active.tasklet);
local_bh_disable();
if (fn(rq[i - 1], i, count) && !check_context_order(engine))
err = -EINVAL;
local_bh_enable();
- tasklet_enable(&engine->execlists.tasklet);
+ tasklet_enable(&engine->active.tasklet);
igt_spinner_end(&spin);
err_free:
--
2.20.1
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