From 2c66555ec19235efd689741c44bbeb893aa8e7de Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 4 Apr 2018 10:33:29 +0100 Subject: [PATCH] drm/i915/selftests: Add basic sanitychecks for execlists MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Before adding a new feature to execlists submission, we should endeavour to cover the baseline behaviour with selftests. So start the ball rolling. Signed-off-by: Chris Wilson Cc: Michał Winiarski CC: Michel Thierry Cc: Jeff McGee Cc: Tvrtko Ursulin Cc: Mika Kuoppala Reviewed-by: Joonas Lahtinen Link: https://patchwork.freedesktop.org/patch/msgid/20180404093329.5383-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_lrc.c | 4 + .../gpu/drm/i915/selftests/i915_live_selftests.h | 1 + drivers/gpu/drm/i915/selftests/intel_lrc.c | 507 +++++++++++++++++++++ 3 files changed, 512 insertions(+) create mode 100644 drivers/gpu/drm/i915/selftests/intel_lrc.c diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 88472845ce96..3592288e4696 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -2609,3 +2609,7 @@ void intel_lr_context_resume(struct drm_i915_private *dev_priv) } } } + +#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) +#include "selftests/intel_lrc.c" +#endif diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h index 9c76f0305b6a..8bf6aa573226 100644 --- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h +++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h @@ -20,4 +20,5 @@ selftest(evict, i915_gem_evict_live_selftests) selftest(hugepages, i915_gem_huge_page_live_selftests) selftest(contexts, i915_gem_context_live_selftests) selftest(hangcheck, intel_hangcheck_live_selftests) +selftest(execlists, intel_execlists_live_selftests) selftest(guc, intel_guc_live_selftest) diff --git a/drivers/gpu/drm/i915/selftests/intel_lrc.c b/drivers/gpu/drm/i915/selftests/intel_lrc.c new file mode 100644 index 000000000000..0481e2e01146 --- /dev/null +++ b/drivers/gpu/drm/i915/selftests/intel_lrc.c @@ -0,0 +1,507 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2018 Intel Corporation + */ + +#include "../i915_selftest.h" + +#include "mock_context.h" + +struct spinner { + struct drm_i915_private *i915; + struct drm_i915_gem_object *hws; + struct drm_i915_gem_object *obj; + u32 *batch; + void *seqno; +}; + +static int spinner_init(struct spinner *spin, struct drm_i915_private *i915) +{ + unsigned int mode; + void *vaddr; + int err; + + GEM_BUG_ON(INTEL_GEN(i915) < 8); + + memset(spin, 0, sizeof(*spin)); + spin->i915 = i915; + + spin->hws = i915_gem_object_create_internal(i915, PAGE_SIZE); + if (IS_ERR(spin->hws)) { + err = PTR_ERR(spin->hws); + goto err; + } + + spin->obj = i915_gem_object_create_internal(i915, PAGE_SIZE); + if (IS_ERR(spin->obj)) { + err = PTR_ERR(spin->obj); + goto err_hws; + } + + i915_gem_object_set_cache_level(spin->hws, I915_CACHE_LLC); + vaddr = i915_gem_object_pin_map(spin->hws, I915_MAP_WB); + if (IS_ERR(vaddr)) { + err = PTR_ERR(vaddr); + goto err_obj; + } + spin->seqno = memset(vaddr, 0xff, PAGE_SIZE); + + mode = HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC; + vaddr = i915_gem_object_pin_map(spin->obj, mode); + if (IS_ERR(vaddr)) { + err = PTR_ERR(vaddr); + goto err_unpin_hws; + } + spin->batch = vaddr; + + return 0; + +err_unpin_hws: + i915_gem_object_unpin_map(spin->hws); +err_obj: + i915_gem_object_put(spin->obj); +err_hws: + i915_gem_object_put(spin->hws); +err: + return err; +} + +static unsigned int seqno_offset(u64 fence) +{ + return offset_in_page(sizeof(u32) * fence); +} + +static u64 hws_address(const struct i915_vma *hws, + const struct i915_request *rq) +{ + return hws->node.start + seqno_offset(rq->fence.context); +} + +static int emit_recurse_batch(struct spinner *spin, + struct i915_request *rq, + u32 arbitration_command) +{ + struct i915_address_space *vm = &rq->ctx->ppgtt->base; + struct i915_vma *hws, *vma; + u32 *batch; + int err; + + vma = i915_vma_instance(spin->obj, vm, NULL); + if (IS_ERR(vma)) + return PTR_ERR(vma); + + hws = i915_vma_instance(spin->hws, vm, NULL); + if (IS_ERR(hws)) + return PTR_ERR(hws); + + err = i915_vma_pin(vma, 0, 0, PIN_USER); + if (err) + return err; + + err = i915_vma_pin(hws, 0, 0, PIN_USER); + if (err) + goto unpin_vma; + + i915_vma_move_to_active(vma, rq, 0); + if (!i915_gem_object_has_active_reference(vma->obj)) { + i915_gem_object_get(vma->obj); + i915_gem_object_set_active_reference(vma->obj); + } + + i915_vma_move_to_active(hws, rq, 0); + if (!i915_gem_object_has_active_reference(hws->obj)) { + i915_gem_object_get(hws->obj); + i915_gem_object_set_active_reference(hws->obj); + } + + batch = spin->batch; + + *batch++ = MI_STORE_DWORD_IMM_GEN4; + *batch++ = lower_32_bits(hws_address(hws, rq)); + *batch++ = upper_32_bits(hws_address(hws, rq)); + *batch++ = rq->fence.seqno; + + *batch++ = arbitration_command; + + *batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1; + *batch++ = lower_32_bits(vma->node.start); + *batch++ = upper_32_bits(vma->node.start); + *batch++ = MI_BATCH_BUFFER_END; /* not reached */ + + i915_gem_chipset_flush(spin->i915); + + err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, 0); + + i915_vma_unpin(hws); +unpin_vma: + i915_vma_unpin(vma); + return err; +} + +static struct i915_request * +spinner_create_request(struct spinner *spin, + struct i915_gem_context *ctx, + struct intel_engine_cs *engine, + u32 arbitration_command) +{ + struct i915_request *rq; + int err; + + rq = i915_request_alloc(engine, ctx); + if (IS_ERR(rq)) + return rq; + + err = emit_recurse_batch(spin, rq, arbitration_command); + if (err) { + __i915_request_add(rq, false); + return ERR_PTR(err); + } + + return rq; +} + +static u32 hws_seqno(const struct spinner *spin, const struct i915_request *rq) +{ + u32 *seqno = spin->seqno + seqno_offset(rq->fence.context); + + return READ_ONCE(*seqno); +} + +struct wedge_me { + struct delayed_work work; + struct drm_i915_private *i915; + const void *symbol; +}; + +static void wedge_me(struct work_struct *work) +{ + struct wedge_me *w = container_of(work, typeof(*w), work.work); + + pr_err("%pS timed out, cancelling all further testing.\n", w->symbol); + + GEM_TRACE("%pS timed out.\n", w->symbol); + GEM_TRACE_DUMP(); + + i915_gem_set_wedged(w->i915); +} + +static void __init_wedge(struct wedge_me *w, + struct drm_i915_private *i915, + long timeout, + const void *symbol) +{ + w->i915 = i915; + w->symbol = symbol; + + INIT_DELAYED_WORK_ONSTACK(&w->work, wedge_me); + schedule_delayed_work(&w->work, timeout); +} + +static void __fini_wedge(struct wedge_me *w) +{ + cancel_delayed_work_sync(&w->work); + destroy_delayed_work_on_stack(&w->work); + w->i915 = NULL; +} + +#define wedge_on_timeout(W, DEV, TIMEOUT) \ + for (__init_wedge((W), (DEV), (TIMEOUT), __builtin_return_address(0)); \ + (W)->i915; \ + __fini_wedge((W))) + +static noinline int +flush_test(struct drm_i915_private *i915, unsigned int flags) +{ + struct wedge_me w; + + cond_resched(); + + wedge_on_timeout(&w, i915, HZ) + i915_gem_wait_for_idle(i915, flags); + + return i915_terminally_wedged(&i915->gpu_error) ? -EIO : 0; +} + +static void spinner_end(struct spinner *spin) +{ + *spin->batch = MI_BATCH_BUFFER_END; + i915_gem_chipset_flush(spin->i915); +} + +static void spinner_fini(struct spinner *spin) +{ + spinner_end(spin); + + i915_gem_object_unpin_map(spin->obj); + i915_gem_object_put(spin->obj); + + i915_gem_object_unpin_map(spin->hws); + i915_gem_object_put(spin->hws); +} + +static bool wait_for_spinner(struct spinner *spin, struct i915_request *rq) +{ + if (!wait_event_timeout(rq->execute, + READ_ONCE(rq->global_seqno), + msecs_to_jiffies(10))) + return false; + + return !(wait_for_us(i915_seqno_passed(hws_seqno(spin, rq), + rq->fence.seqno), + 10) && + wait_for(i915_seqno_passed(hws_seqno(spin, rq), + rq->fence.seqno), + 1000)); +} + +static int live_sanitycheck(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct intel_engine_cs *engine; + struct i915_gem_context *ctx; + enum intel_engine_id id; + struct spinner spin; + int err = -ENOMEM; + + if (!HAS_LOGICAL_RING_CONTEXTS(i915)) + return 0; + + mutex_lock(&i915->drm.struct_mutex); + + if (spinner_init(&spin, i915)) + goto err_unlock; + + ctx = kernel_context(i915); + if (!ctx) + goto err_spin; + + for_each_engine(engine, i915, id) { + struct i915_request *rq; + + rq = spinner_create_request(&spin, ctx, engine, MI_NOOP); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ctx; + } + + i915_request_add(rq); + if (!wait_for_spinner(&spin, rq)) { + GEM_TRACE("spinner failed to start\n"); + GEM_TRACE_DUMP(); + i915_gem_set_wedged(i915); + err = -EIO; + goto err_ctx; + } + + spinner_end(&spin); + if (flush_test(i915, I915_WAIT_LOCKED)) { + err = -EIO; + goto err_ctx; + } + } + + err = 0; +err_ctx: + kernel_context_close(ctx); +err_spin: + spinner_fini(&spin); +err_unlock: + flush_test(i915, I915_WAIT_LOCKED); + mutex_unlock(&i915->drm.struct_mutex); + return err; +} + +static int live_preempt(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct i915_gem_context *ctx_hi, *ctx_lo; + struct spinner spin_hi, spin_lo; + struct intel_engine_cs *engine; + enum intel_engine_id id; + int err = -ENOMEM; + + if (!HAS_LOGICAL_RING_PREEMPTION(i915)) + return 0; + + mutex_lock(&i915->drm.struct_mutex); + + if (spinner_init(&spin_hi, i915)) + goto err_unlock; + + if (spinner_init(&spin_lo, i915)) + goto err_spin_hi; + + ctx_hi = kernel_context(i915); + if (!ctx_hi) + goto err_spin_lo; + ctx_hi->priority = I915_CONTEXT_MAX_USER_PRIORITY; + + ctx_lo = kernel_context(i915); + if (!ctx_lo) + goto err_ctx_hi; + ctx_lo->priority = I915_CONTEXT_MIN_USER_PRIORITY; + + for_each_engine(engine, i915, id) { + struct i915_request *rq; + + rq = spinner_create_request(&spin_lo, ctx_lo, engine, + MI_ARB_CHECK); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ctx_lo; + } + + i915_request_add(rq); + if (!wait_for_spinner(&spin_lo, rq)) { + GEM_TRACE("lo spinner failed to start\n"); + GEM_TRACE_DUMP(); + i915_gem_set_wedged(i915); + err = -EIO; + goto err_ctx_lo; + } + + rq = spinner_create_request(&spin_hi, ctx_hi, engine, + MI_ARB_CHECK); + if (IS_ERR(rq)) { + spinner_end(&spin_lo); + err = PTR_ERR(rq); + goto err_ctx_lo; + } + + i915_request_add(rq); + if (!wait_for_spinner(&spin_hi, rq)) { + GEM_TRACE("hi spinner failed to start\n"); + GEM_TRACE_DUMP(); + i915_gem_set_wedged(i915); + err = -EIO; + goto err_ctx_lo; + } + + spinner_end(&spin_hi); + spinner_end(&spin_lo); + if (flush_test(i915, I915_WAIT_LOCKED)) { + err = -EIO; + goto err_ctx_lo; + } + } + + err = 0; +err_ctx_lo: + kernel_context_close(ctx_lo); +err_ctx_hi: + kernel_context_close(ctx_hi); +err_spin_lo: + spinner_fini(&spin_lo); +err_spin_hi: + spinner_fini(&spin_hi); +err_unlock: + flush_test(i915, I915_WAIT_LOCKED); + mutex_unlock(&i915->drm.struct_mutex); + return err; +} + +static int live_late_preempt(void *arg) +{ + struct drm_i915_private *i915 = arg; + struct i915_gem_context *ctx_hi, *ctx_lo; + struct spinner spin_hi, spin_lo; + struct intel_engine_cs *engine; + enum intel_engine_id id; + int err = -ENOMEM; + + if (!HAS_LOGICAL_RING_PREEMPTION(i915)) + return 0; + + mutex_lock(&i915->drm.struct_mutex); + + if (spinner_init(&spin_hi, i915)) + goto err_unlock; + + if (spinner_init(&spin_lo, i915)) + goto err_spin_hi; + + ctx_hi = kernel_context(i915); + if (!ctx_hi) + goto err_spin_lo; + + ctx_lo = kernel_context(i915); + if (!ctx_lo) + goto err_ctx_hi; + + for_each_engine(engine, i915, id) { + struct i915_request *rq; + + rq = spinner_create_request(&spin_lo, ctx_lo, engine, + MI_ARB_CHECK); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ctx_lo; + } + + i915_request_add(rq); + if (!wait_for_spinner(&spin_lo, rq)) { + pr_err("First context failed to start\n"); + goto err_wedged; + } + + rq = spinner_create_request(&spin_hi, ctx_hi, engine, MI_NOOP); + if (IS_ERR(rq)) { + spinner_end(&spin_lo); + err = PTR_ERR(rq); + goto err_ctx_lo; + } + + i915_request_add(rq); + if (wait_for_spinner(&spin_hi, rq)) { + pr_err("Second context overtook first?\n"); + goto err_wedged; + } + + engine->schedule(rq, I915_PRIORITY_MAX); + + if (!wait_for_spinner(&spin_hi, rq)) { + pr_err("High priority context failed to preempt the low priority context\n"); + GEM_TRACE_DUMP(); + goto err_wedged; + } + + spinner_end(&spin_hi); + spinner_end(&spin_lo); + if (flush_test(i915, I915_WAIT_LOCKED)) { + err = -EIO; + goto err_ctx_lo; + } + } + + err = 0; +err_ctx_lo: + kernel_context_close(ctx_lo); +err_ctx_hi: + kernel_context_close(ctx_hi); +err_spin_lo: + spinner_fini(&spin_lo); +err_spin_hi: + spinner_fini(&spin_hi); +err_unlock: + flush_test(i915, I915_WAIT_LOCKED); + mutex_unlock(&i915->drm.struct_mutex); + return err; + +err_wedged: + spinner_end(&spin_hi); + spinner_end(&spin_lo); + i915_gem_set_wedged(i915); + err = -EIO; + goto err_ctx_lo; +} + +int intel_execlists_live_selftests(struct drm_i915_private *i915) +{ + static const struct i915_subtest tests[] = { + SUBTEST(live_sanitycheck), + SUBTEST(live_preempt), + SUBTEST(live_late_preempt), + }; + return i915_subtests(tests, i915); +} -- 2.11.0