From 9a61363a6310dda769b8c7601fc9de8ed81e6bc8 Mon Sep 17 00:00:00 2001 From: Lionel Landwerlin Date: Thu, 10 Oct 2019 16:05:19 +0100 Subject: [PATCH] drm/i915/perf: store the associated engine of a stream We'll use this information later to verify that a client trying to reconfigure the stream does so on the right engine. For now, we want to pull the knowledge of which engine we use into a central property. Signed-off-by: Lionel Landwerlin Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20191010150520.26488-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_perf.c | 30 ++++++++++++++++++++++++++---- drivers/gpu/drm/i915/i915_perf_types.h | 5 +++++ 2 files changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index 5a34cad7d824..1a5c6591b9bb 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -197,6 +197,7 @@ #include "gem/i915_gem_context.h" #include "gem/i915_gem_pm.h" +#include "gt/intel_engine_user.h" #include "gt/intel_lrc_reg.h" #include "i915_drv.h" @@ -347,6 +348,7 @@ static const struct i915_oa_format gen8_plus_oa_formats[I915_OA_FORMAT_MAX] = { * @oa_format: An OA unit HW report format * @oa_periodic: Whether to enable periodic OA unit sampling * @oa_period_exponent: The OA unit sampling period is derived from this + * @engine: The engine (typically rcs0) being monitored by the OA unit * * As read_properties_unlocked() enumerates and validates the properties given * to open a stream of metrics the configuration is built up in the structure @@ -363,6 +365,8 @@ struct perf_open_properties { int oa_format; bool oa_periodic; int oa_period_exponent; + + struct intel_engine_cs *engine; }; static enum hrtimer_restart oa_poll_check_timer_cb(struct hrtimer *hrtimer); @@ -1205,7 +1209,7 @@ static struct intel_context *oa_pin_context(struct i915_perf_stream *stream) int err; for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { - if (ce->engine->class != RENDER_CLASS) + if (ce->engine != stream->engine) /* first match! */ continue; /* @@ -2127,7 +2131,13 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, int format_size; int ret; - /* If the sysfs metrics/ directory wasn't registered for some + if (!props->engine) { + DRM_DEBUG("OA engine not specified\n"); + return -EINVAL; + } + + /* + * If the sysfs metrics/ directory wasn't registered for some * reason then don't let userspace try their luck with config * IDs */ @@ -2146,7 +2156,8 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, return -ENODEV; } - /* To avoid the complexity of having to accurately filter + /* + * To avoid the complexity of having to accurately filter * counter reports and marshal to the appropriate client * we currently only allow exclusive access */ @@ -2160,6 +2171,9 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream, return -EINVAL; } + stream->engine = props->engine; + stream->gt = stream->engine->gt; + stream->sample_size = sizeof(struct drm_i915_perf_record_header); format_size = perf->oa_formats[props->oa_format].size; @@ -2711,7 +2725,6 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf, } stream->perf = perf; - stream->gt = &perf->i915->gt; stream->ctx = specific_ctx; ret = i915_oa_stream_init(stream, param, props); @@ -2796,6 +2809,15 @@ static int read_properties_unlocked(struct i915_perf *perf, return -EINVAL; } + /* At the moment we only support using i915-perf on the RCS. */ + props->engine = intel_engine_lookup_user(perf->i915, + I915_ENGINE_CLASS_RENDER, + 0); + if (!props->engine) { + DRM_DEBUG("No RENDER-capable engines\n"); + return -EINVAL; + } + /* Considering that ID = 0 is reserved and assuming that we don't * (currently) expect any configurations to ever specify duplicate * values for a particular property ID then the last _PROP_MAX value is diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h index 2d17059d32ee..82cd3b295037 100644 --- a/drivers/gpu/drm/i915/i915_perf_types.h +++ b/drivers/gpu/drm/i915/i915_perf_types.h @@ -141,6 +141,11 @@ struct i915_perf_stream { intel_wakeref_t wakeref; /** + * @engine: Engine associated with this performance stream. + */ + struct intel_engine_cs *engine; + + /** * @sample_flags: Flags representing the `DRM_I915_PERF_PROP_SAMPLE_*` * properties given when opening a stream, representing the contents * of a single sample as read() by userspace. -- 2.11.0