From: Chris Wilson Date: Fri, 7 Oct 2016 06:53:26 +0000 (+0100) Subject: drm/i915: Reset the breadcrumbs IRQ more carefully X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=61a05870b939b9c5551817ad65b74194ea84140c;p=linux-beck.git drm/i915: Reset the breadcrumbs IRQ more carefully Along with the interrupt, we want to restore the fake-irq and wait-timeout detection. If we use the breadcrumbs interface to setup the interrupt as it wants, the auxiliary timers will also be restored. v2: Cancel both timers as well, sanitize the IMR. Fixes: 821ed7df6e2a ("drm/i915: Update reset path to fix incomplete requests") Signed-off-by: Chris Wilson Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20161007065327.24515-3-chris@chris-wilson.co.uk (cherry picked from commit ad07dfcddf1394e6fed094e7fb426b4242a6814e) Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c index 9bad14d22c95..495611b7068d 100644 --- a/drivers/gpu/drm/i915/intel_breadcrumbs.c +++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c @@ -578,6 +578,36 @@ int intel_engine_init_breadcrumbs(struct intel_engine_cs *engine) return 0; } +static void cancel_fake_irq(struct intel_engine_cs *engine) +{ + struct intel_breadcrumbs *b = &engine->breadcrumbs; + + del_timer_sync(&b->hangcheck); + del_timer_sync(&b->fake_irq); + clear_bit(engine->id, &engine->i915->gpu_error.missed_irq_rings); +} + +void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine) +{ + struct intel_breadcrumbs *b = &engine->breadcrumbs; + + cancel_fake_irq(engine); + spin_lock(&b->lock); + + __intel_breadcrumbs_disable_irq(b); + if (intel_engine_has_waiter(engine)) { + b->timeout = wait_timeout(); + __intel_breadcrumbs_enable_irq(b); + if (READ_ONCE(b->irq_posted)) + wake_up_process(b->first_wait->tsk); + } else { + /* sanitize the IMR and unmask any auxiliary interrupts */ + irq_disable(engine); + } + + spin_unlock(&b->lock); +} + void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine) { struct intel_breadcrumbs *b = &engine->breadcrumbs; @@ -585,8 +615,7 @@ void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine) if (!IS_ERR_OR_NULL(b->signaler)) kthread_stop(b->signaler); - del_timer_sync(&b->hangcheck); - del_timer_sync(&b->fake_irq); + cancel_fake_irq(engine); } unsigned int intel_kick_waiters(struct drm_i915_private *i915) diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index e405f1080296..025e232a4205 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -210,9 +210,6 @@ void intel_engine_init_seqno(struct intel_engine_cs *engine, u32 seqno) void intel_engine_init_hangcheck(struct intel_engine_cs *engine) { memset(&engine->hangcheck, 0, sizeof(engine->hangcheck)); - clear_bit(engine->id, &engine->i915->gpu_error.missed_irq_rings); - if (intel_engine_has_waiter(engine)) - i915_queue_hangcheck(engine->i915); } static void intel_engine_init_requests(struct intel_engine_cs *engine) @@ -307,18 +304,6 @@ int intel_engine_init_common(struct intel_engine_cs *engine) return 0; } -void intel_engine_reset_irq(struct intel_engine_cs *engine) -{ - struct drm_i915_private *dev_priv = engine->i915; - - spin_lock_irq(&dev_priv->irq_lock); - if (intel_engine_has_waiter(engine)) - engine->irq_enable(engine); - else - engine->irq_disable(engine); - spin_unlock_irq(&dev_priv->irq_lock); -} - /** * intel_engines_cleanup_common - cleans up the engine state created by * the common initiailizers. diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 7da83330257d..413760b1f1b9 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1235,7 +1235,7 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine) lrc_init_hws(engine); - intel_engine_reset_irq(engine); + intel_engine_reset_breadcrumbs(engine); I915_WRITE(RING_HWSTAM(engine->mmio_base), 0xffffffff); diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 7a74750076c5..ed9955dce156 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -564,7 +564,7 @@ static int init_ring_common(struct intel_engine_cs *engine) else intel_ring_setup_status_page(engine); - intel_engine_reset_irq(engine); + intel_engine_reset_breadcrumbs(engine); /* Enforce ordering by reading HEAD register back */ I915_READ_HEAD(engine); diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 1d8de09ec535..ec0b4a0c605d 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -493,7 +493,6 @@ int __intel_ring_space(int head, int tail, int size); void intel_ring_update_space(struct intel_ring *ring); void intel_engine_init_seqno(struct intel_engine_cs *engine, u32 seqno); -void intel_engine_reset_irq(struct intel_engine_cs *engine); void intel_engine_setup_common(struct intel_engine_cs *engine); int intel_engine_init_common(struct intel_engine_cs *engine); @@ -585,6 +584,7 @@ static inline bool intel_engine_wakeup(const struct intel_engine_cs *engine) return wakeup; } +void intel_engine_reset_breadcrumbs(struct intel_engine_cs *engine); void intel_engine_fini_breadcrumbs(struct intel_engine_cs *engine); unsigned int intel_kick_waiters(struct drm_i915_private *i915); unsigned int intel_kick_signalers(struct drm_i915_private *i915);