From 08f56f8f3799b2ed1c5ac7eed6d86a4926289655 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 2 Mar 2020 08:57:57 +0000 Subject: [PATCH] drm/i915/perf: Reintroduce wait on OA configuration completion We still need to wait for the initial OA configuration to happen before we enable OA report writes to the OA buffer. Reported-by: Lionel Landwerlin Fixes: 15d0ace1f876 ("drm/i915/perf: execute OA configuration from command stream") Closes: https://gitlab.freedesktop.org/drm/intel/issues/1356 Testcase: igt/perf/stream-open-close Signed-off-by: Chris Wilson Cc: Lionel Landwerlin Reviewed-by: Lionel Landwerlin Link: https://patchwork.freedesktop.org/patch/msgid/20200302085812.4172450-7-chris@chris-wilson.co.uk (cherry picked from commit 4b4e973d5eb89244b67d3223b60f752d0479f253) Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_perf.c | 58 ++++++++++++++++++-------- drivers/gpu/drm/i915/i915_perf_types.h | 3 +- 2 files changed, 43 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index 0f556d80ba36..3b6b913bd27a 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -1954,9 +1954,10 @@ out: return i915_vma_get(oa_bo->vma); } -static int emit_oa_config(struct i915_perf_stream *stream, - struct i915_oa_config *oa_config, - struct intel_context *ce) +static struct i915_request * +emit_oa_config(struct i915_perf_stream *stream, + struct i915_oa_config *oa_config, + struct intel_context *ce) { struct i915_request *rq; struct i915_vma *vma; @@ -1964,7 +1965,7 @@ static int emit_oa_config(struct i915_perf_stream *stream, vma = get_oa_vma(stream, oa_config); if (IS_ERR(vma)) - return PTR_ERR(vma); + return ERR_CAST(vma); err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH); if (err) @@ -1989,13 +1990,17 @@ static int emit_oa_config(struct i915_perf_stream *stream, err = rq->engine->emit_bb_start(rq, vma->node.start, 0, I915_DISPATCH_SECURE); + if (err) + goto err_add_request; + + i915_request_get(rq); err_add_request: i915_request_add(rq); err_vma_unpin: i915_vma_unpin(vma); err_vma_put: i915_vma_put(vma); - return err; + return err ? ERR_PTR(err) : rq; } static struct intel_context *oa_context(struct i915_perf_stream *stream) @@ -2003,7 +2008,8 @@ static struct intel_context *oa_context(struct i915_perf_stream *stream) return stream->pinned_ctx ?: stream->engine->kernel_context; } -static int hsw_enable_metric_set(struct i915_perf_stream *stream) +static struct i915_request * +hsw_enable_metric_set(struct i915_perf_stream *stream) { struct intel_uncore *uncore = stream->uncore; @@ -2406,7 +2412,8 @@ static int lrc_configure_all_contexts(struct i915_perf_stream *stream, return oa_configure_all_contexts(stream, regs, ARRAY_SIZE(regs)); } -static int gen8_enable_metric_set(struct i915_perf_stream *stream) +static struct i915_request * +gen8_enable_metric_set(struct i915_perf_stream *stream) { struct intel_uncore *uncore = stream->uncore; struct i915_oa_config *oa_config = stream->oa_config; @@ -2448,7 +2455,7 @@ static int gen8_enable_metric_set(struct i915_perf_stream *stream) */ ret = lrc_configure_all_contexts(stream, oa_config); if (ret) - return ret; + return ERR_PTR(ret); return emit_oa_config(stream, oa_config, oa_context(stream)); } @@ -2460,7 +2467,8 @@ static u32 oag_report_ctx_switches(const struct i915_perf_stream *stream) 0 : GEN12_OAG_OA_DEBUG_DISABLE_CTX_SWITCH_REPORTS); } -static int gen12_enable_metric_set(struct i915_perf_stream *stream) +static struct i915_request * +gen12_enable_metric_set(struct i915_perf_stream *stream) { struct intel_uncore *uncore = stream->uncore; struct i915_oa_config *oa_config = stream->oa_config; @@ -2491,7 +2499,7 @@ static int gen12_enable_metric_set(struct i915_perf_stream *stream) */ ret = gen12_configure_all_contexts(stream, oa_config); if (ret) - return ret; + return ERR_PTR(ret); /* * For Gen12, performance counters are context @@ -2501,7 +2509,7 @@ static int gen12_enable_metric_set(struct i915_perf_stream *stream) if (stream->ctx) { ret = gen12_configure_oar_context(stream, true); if (ret) - return ret; + return ERR_PTR(ret); } return emit_oa_config(stream, oa_config, oa_context(stream)); @@ -2696,6 +2704,20 @@ static const struct i915_perf_stream_ops i915_oa_stream_ops = { .read = i915_oa_read, }; +static int i915_perf_stream_enable_sync(struct i915_perf_stream *stream) +{ + struct i915_request *rq; + + rq = stream->perf->ops.enable_metric_set(stream); + if (IS_ERR(rq)) + return PTR_ERR(rq); + + i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT); + i915_request_put(rq); + + return 0; +} + /** * i915_oa_stream_init - validate combined props for OA stream and init * @stream: An i915 perf stream @@ -2829,7 +2851,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, stream->ops = &i915_oa_stream_ops; perf->exclusive_stream = stream; - ret = perf->ops.enable_metric_set(stream); + ret = i915_perf_stream_enable_sync(stream); if (ret) { DRM_DEBUG("Unable to enable metric set\n"); goto err_enable; @@ -3147,7 +3169,7 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream, return -EINVAL; if (config != stream->oa_config) { - int err; + struct i915_request *rq; /* * If OA is bound to a specific context, emit the @@ -3158,11 +3180,13 @@ static long i915_perf_config_locked(struct i915_perf_stream *stream, * When set globally, we use a low priority kernel context, * so it will effectively take effect when idle. */ - err = emit_oa_config(stream, config, oa_context(stream)); - if (err == 0) + rq = emit_oa_config(stream, config, oa_context(stream)); + if (!IS_ERR(rq)) { config = xchg(&stream->oa_config, config); - else - ret = err; + i915_request_put(rq); + } else { + ret = PTR_ERR(rq); + } } i915_oa_config_put(config); diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h index 45e581455f5d..a0e22f00f6cf 100644 --- a/drivers/gpu/drm/i915/i915_perf_types.h +++ b/drivers/gpu/drm/i915/i915_perf_types.h @@ -339,7 +339,8 @@ struct i915_oa_ops { * counter reports being sampled. May apply system constraints such as * disabling EU clock gating as required. */ - int (*enable_metric_set)(struct i915_perf_stream *stream); + struct i915_request * + (*enable_metric_set)(struct i915_perf_stream *stream); /** * @disable_metric_set: Remove system constraints associated with using -- 2.20.1