diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 52db2bde44a3..efe9a7a89ede 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -93,79 +93,6 @@ static void intel_context_active_release(struct intel_context *ce) i915_active_release(&ce->active); } -int __intel_context_do_pin(struct intel_context *ce) -{ - int err; - - if (unlikely(!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))) { - err = intel_context_alloc_state(ce); - if (err) - return err; - } - - err = i915_active_acquire(&ce->active); - if (err) - return err; - - if (mutex_lock_interruptible(&ce->pin_mutex)) { - err = -EINTR; - goto out_release; - } - - if (unlikely(intel_context_is_closed(ce))) { - err = -ENOENT; - goto out_unlock; - } - - if (likely(!atomic_add_unless(&ce->pin_count, 1, 0))) { - err = intel_context_active_acquire(ce); - if (unlikely(err)) - goto out_unlock; - - err = ce->ops->pin(ce); - if (unlikely(err)) - goto err_active; - - CE_TRACE(ce, "pin ring:{start:%08x, head:%04x, tail:%04x}\n", - i915_ggtt_offset(ce->ring->vma), - ce->ring->head, ce->ring->tail); - - smp_mb__before_atomic(); /* flush pin before it is visible */ - atomic_inc(&ce->pin_count); - } - - GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */ - GEM_BUG_ON(i915_active_is_idle(&ce->active)); - goto out_unlock; - -err_active: - intel_context_active_release(ce); -out_unlock: - mutex_unlock(&ce->pin_mutex); -out_release: - i915_active_release(&ce->active); - return err; -} - -void intel_context_unpin(struct intel_context *ce) -{ - if (!atomic_dec_and_test(&ce->pin_count)) - return; - - CE_TRACE(ce, "unpin\n"); - ce->ops->unpin(ce); - - /* - * Once released, we may asynchronously drop the active reference. - * As that may be the only reference keeping the context alive, - * take an extra now so that it is not freed before we finish - * dereferencing it. - */ - intel_context_get(ce); - intel_context_active_release(ce); - intel_context_put(ce); -} - static int __context_pin_state(struct i915_vma *vma) { unsigned int bias = i915_ggtt_pin_bias(vma) | PIN_OFFSET_BIAS; @@ -225,37 +152,15 @@ static void __ring_retire(struct intel_ring *ring) intel_ring_unpin(ring); } -__i915_active_call -static void __intel_context_retire(struct i915_active *active) +static int intel_context_pre_pin(struct intel_context *ce) { - struct intel_context *ce = container_of(active, typeof(*ce), active); - - CE_TRACE(ce, "retire runtime: { total:%lluns, avg:%lluns }\n", - intel_context_get_total_runtime_ns(ce), - intel_context_get_avg_runtime_ns(ce)); - - set_bit(CONTEXT_VALID_BIT, &ce->flags); - if (ce->state) - __context_unpin_state(ce->state); - - intel_timeline_unpin(ce->timeline); - __ring_retire(ce->ring); - - intel_context_put(ce); -} - -static int __intel_context_active(struct i915_active *active) -{ - struct intel_context *ce = container_of(active, typeof(*ce), active); int err; CE_TRACE(ce, "active\n"); - intel_context_get(ce); - err = __ring_active(ce->ring); if (err) - goto err_put; + return err; err = intel_timeline_pin(ce->timeline); if (err) @@ -268,10 +173,155 @@ static int __intel_context_active(struct i915_active *active) if (err) goto err_timeline; + return 0; err_timeline: intel_timeline_unpin(ce->timeline); +err_ring: + __ring_retire(ce->ring); + return err; +} + +static void intel_context_post_unpin(struct intel_context *ce) +{ + if (ce->state) + __context_unpin_state(ce->state); + + intel_timeline_unpin(ce->timeline); + __ring_retire(ce->ring); +} + +int __intel_context_do_pin(struct intel_context *ce) +{ + bool handoff = false; + void *vaddr; + int err = 0; + + if (unlikely(!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))) { + err = intel_context_alloc_state(ce); + if (err) + return err; + } + + /* + * We always pin the context/ring/timeline here, to ensure a pin + * refcount for __intel_context_active(), which prevent a lock + * inversion of ce->pin_mutex vs dma_resv_lock(). + */ + err = intel_context_pre_pin(ce); + if (err) + return err; + + err = i915_active_acquire(&ce->active); + if (err) + goto err_ctx_unpin; + + err = ce->ops->pre_pin(ce, &vaddr); + if (err) + goto err_release; + + err = mutex_lock_interruptible(&ce->pin_mutex); + if (err) + goto err_post_unpin; + + if (unlikely(intel_context_is_closed(ce))) { + err = -ENOENT; + goto err_unlock; + } + + if (likely(!atomic_add_unless(&ce->pin_count, 1, 0))) { + err = intel_context_active_acquire(ce); + if (unlikely(err)) + goto err_unlock; + + err = ce->ops->pin(ce, vaddr); + if (err) { + intel_context_active_release(ce); + goto err_unlock; + } + + CE_TRACE(ce, "pin ring:{start:%08x, head:%04x, tail:%04x}\n", + i915_ggtt_offset(ce->ring->vma), + ce->ring->head, ce->ring->tail); + + handoff = true; + smp_mb__before_atomic(); /* flush pin before it is visible */ + atomic_inc(&ce->pin_count); + } + + GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */ + +err_unlock: + mutex_unlock(&ce->pin_mutex); +err_post_unpin: + if (!handoff) + ce->ops->post_unpin(ce); +err_release: + i915_active_release(&ce->active); +err_ctx_unpin: + intel_context_post_unpin(ce); + return err; +} + +void intel_context_unpin(struct intel_context *ce) +{ + if (!atomic_dec_and_test(&ce->pin_count)) + return; + + CE_TRACE(ce, "unpin\n"); + ce->ops->unpin(ce); + ce->ops->post_unpin(ce); + + /* + * Once released, we may asynchronously drop the active reference. + * As that may be the only reference keeping the context alive, + * take an extra now so that it is not freed before we finish + * dereferencing it. + */ + intel_context_get(ce); + intel_context_active_release(ce); + intel_context_put(ce); +} + +__i915_active_call +static void __intel_context_retire(struct i915_active *active) +{ + struct intel_context *ce = container_of(active, typeof(*ce), active); + + CE_TRACE(ce, "retire runtime: { total:%lluns, avg:%lluns }\n", + intel_context_get_total_runtime_ns(ce), + intel_context_get_avg_runtime_ns(ce)); + + set_bit(CONTEXT_VALID_BIT, &ce->flags); + intel_context_post_unpin(ce); + intel_context_put(ce); +} + +static int __intel_context_active(struct i915_active *active) +{ + struct intel_context *ce = container_of(active, typeof(*ce), active); + int err; + + intel_context_get(ce); + + /* everything should already be activated by intel_context_pre_pin() */ + err = __ring_active(ce->ring); + if (GEM_WARN_ON(err)) + goto err_put; + + err = intel_timeline_pin(ce->timeline); + if (GEM_WARN_ON(err)) + goto err_ring; + + if (ce->state) { + GEM_WARN_ON(!i915_active_acquire_if_busy(&ce->state->active)); + __i915_vma_pin(ce->state); + i915_vma_make_unshrinkable(ce->state); + } + + return 0; + err_ring: __ring_retire(ce->ring); err_put: diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h index 4954b0df4864..ca8e05b4d3ef 100644 --- a/drivers/gpu/drm/i915/gt/intel_context_types.h +++ b/drivers/gpu/drm/i915/gt/intel_context_types.h @@ -30,8 +30,10 @@ struct intel_ring; struct intel_context_ops { int (*alloc)(struct intel_context *ce); - int (*pin)(struct intel_context *ce); + int (*pre_pin)(struct intel_context *ce, void **vaddr); + int (*pin)(struct intel_context *ce, void *vaddr); void (*unpin)(struct intel_context *ce); + void (*post_unpin)(struct intel_context *ce); void (*enter)(struct intel_context *ce); void (*exit)(struct intel_context *ce); diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 801ebe1326f3..1f6dc69b2490 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -3296,7 +3296,10 @@ static void execlists_context_unpin(struct intel_context *ce) { check_redzone((void *)ce->lrc_reg_state - LRC_STATE_OFFSET, ce->engine); +} +static void execlists_context_post_unpin(struct intel_context *ce) +{ i915_gem_object_unpin_map(ce->state->obj); } @@ -3458,20 +3461,23 @@ __execlists_update_reg_state(const struct intel_context *ce, } static int -__execlists_context_pin(struct intel_context *ce, - struct intel_engine_cs *engine) +execlists_context_pre_pin(struct intel_context *ce, void **vaddr) { - void *vaddr; - GEM_BUG_ON(!ce->state); GEM_BUG_ON(!i915_vma_is_pinned(ce->state)); - vaddr = i915_gem_object_pin_map(ce->state->obj, - i915_coherent_map_type(engine->i915) | + *vaddr = i915_gem_object_pin_map(ce->state->obj, + i915_coherent_map_type(ce->engine->i915) | I915_MAP_OVERRIDE); - if (IS_ERR(vaddr)) - return PTR_ERR(vaddr); + return PTR_ERR_OR_ZERO(*vaddr); +} + +static int +__execlists_context_pin(struct intel_context *ce, + struct intel_engine_cs *engine, + void *vaddr) +{ ce->lrc.lrca = lrc_descriptor(ce, engine) | CTX_DESC_FORCE_RESTORE; ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET; __execlists_update_reg_state(ce, engine, ce->ring->tail); @@ -3479,9 +3485,9 @@ __execlists_context_pin(struct intel_context *ce, return 0; } -static int execlists_context_pin(struct intel_context *ce) +static int execlists_context_pin(struct intel_context *ce, void *vaddr) { - return __execlists_context_pin(ce, ce->engine); + return __execlists_context_pin(ce, ce->engine, vaddr); } static int execlists_context_alloc(struct intel_context *ce) @@ -3507,8 +3513,10 @@ static void execlists_context_reset(struct intel_context *ce) static const struct intel_context_ops execlists_context_ops = { .alloc = execlists_context_alloc, + .pre_pin = execlists_context_pre_pin, .pin = execlists_context_pin, .unpin = execlists_context_unpin, + .post_unpin = execlists_context_post_unpin, .enter = intel_context_enter_engine, .exit = intel_context_exit_engine, @@ -5447,12 +5455,12 @@ static int virtual_context_alloc(struct intel_context *ce) return __execlists_context_alloc(ce, ve->siblings[0]); } -static int virtual_context_pin(struct intel_context *ce) +static int virtual_context_pin(struct intel_context *ce, void *vaddr) { struct virtual_engine *ve = container_of(ce, typeof(*ve), context); /* Note: we must use a real engine class for setting up reg state */ - return __execlists_context_pin(ce, ve->siblings[0]); + return __execlists_context_pin(ce, ve->siblings[0], vaddr); } static void virtual_context_enter(struct intel_context *ce) @@ -5480,8 +5488,10 @@ static void virtual_context_exit(struct intel_context *ce) static const struct intel_context_ops virtual_context_ops = { .alloc = virtual_context_alloc, + .pre_pin = execlists_context_pre_pin, .pin = virtual_context_pin, .unpin = execlists_context_unpin, + .post_unpin = execlists_context_post_unpin, .enter = virtual_context_enter, .exit = virtual_context_exit, diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c index a3b10f3c83eb..93cf72cfd318 100644 --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c @@ -499,6 +499,10 @@ static void __context_unpin_ppgtt(struct intel_context *ce) } static void ring_context_unpin(struct intel_context *ce) +{ +} + +static void ring_context_post_unpin(struct intel_context *ce) { __context_unpin_ppgtt(ce); } @@ -587,11 +591,16 @@ static int ring_context_alloc(struct intel_context *ce) return 0; } -static int ring_context_pin(struct intel_context *ce) +static int ring_context_pre_pin(struct intel_context *ce, void **unused) { return __context_pin_ppgtt(ce); } +static int ring_context_pin(struct intel_context *ce, void *unused) +{ + return 0; +} + static void ring_context_reset(struct intel_context *ce) { intel_ring_reset(ce->ring, ce->ring->emit); @@ -600,8 +609,10 @@ static void ring_context_reset(struct intel_context *ce) static const struct intel_context_ops ring_context_ops = { .alloc = ring_context_alloc, + .pre_pin = ring_context_pre_pin, .pin = ring_context_pin, .unpin = ring_context_unpin, + .post_unpin = ring_context_post_unpin, .enter = intel_context_enter_engine, .exit = intel_context_exit_engine, diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c index 79764305b8ec..c8e631222f23 100644 --- a/drivers/gpu/drm/i915/gt/mock_engine.c +++ b/drivers/gpu/drm/i915/gt/mock_engine.c @@ -131,6 +131,10 @@ static void mock_context_unpin(struct intel_context *ce) { } +static void mock_context_post_unpin(struct intel_context *ce) +{ +} + static void mock_context_destroy(struct kref *ref) { struct intel_context *ce = container_of(ref, typeof(*ce), ref); @@ -163,7 +167,12 @@ static int mock_context_alloc(struct intel_context *ce) return 0; } -static int mock_context_pin(struct intel_context *ce) +static int mock_context_pre_pin(struct intel_context *ce, void **unused) +{ + return 0; +} + +static int mock_context_pin(struct intel_context *ce, void *unused) { return 0; } @@ -175,8 +184,10 @@ static void mock_context_reset(struct intel_context *ce) static const struct intel_context_ops mock_context_ops = { .alloc = mock_context_alloc, + .pre_pin = mock_context_pre_pin, .pin = mock_context_pin, .unpin = mock_context_unpin, + .post_unpin = mock_context_post_unpin, .enter = intel_context_enter_engine, .exit = intel_context_exit_engine,