On Wed, Nov 02, 2022 at 10:10:47AM -0700, Daniele Ceraolo Spurio wrote:
> There is no userspace user for this CS yet, we only need it for internal
> kernel ops (e.g. HuC, PXP), so don't expose it.
>
> v2: even if it's not exposed, rename the engine so it is easier to
> identify in the debug logs (Matt)
>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
> Cc: Matt Roper <matthew.d.ro...@intel.com>
Reviewed-by: Matt Roper <matthew.d.ro...@intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_engine_user.c | 27 ++++++++++++++++-----
> 1 file changed, 21 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_user.c
> b/drivers/gpu/drm/i915/gt/intel_engine_user.c
> index 79312b734690..cd4f1b126f75 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_user.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_user.c
> @@ -191,6 +191,15 @@ static void add_legacy_ring(struct legacy_ring *ring,
> ring->instance++;
> }
>
> +static void engine_rename(struct intel_engine_cs *engine, const char *name,
> u16 instance)
> +{
> + char old[sizeof(engine->name)];
> +
> + memcpy(old, engine->name, sizeof(engine->name));
> + scnprintf(engine->name, sizeof(engine->name), "%s%u", name, instance);
> + drm_dbg(&engine->i915->drm, "renamed %s to %s\n", old, engine->name);
> +}
> +
> void intel_engines_driver_register(struct drm_i915_private *i915)
> {
> struct legacy_ring ring = {};
> @@ -206,11 +215,19 @@ void intel_engines_driver_register(struct
> drm_i915_private *i915)
> struct intel_engine_cs *engine =
> container_of((struct rb_node *)it, typeof(*engine),
> uabi_node);
> - char old[sizeof(engine->name)];
>
> if (intel_gt_has_unrecoverable_error(engine->gt))
> continue; /* ignore incomplete engines */
>
> + /*
> + * We don't want to expose the GSC engine to the users, but we
> + * still rename it so it is easier to identify in the debug logs
> + */
> + if (engine->id == GSC0) {
> + engine_rename(engine, "gsc", 0);
> + continue;
> + }
> +
> GEM_BUG_ON(engine->class >= ARRAY_SIZE(uabi_classes));
> engine->uabi_class = uabi_classes[engine->class];
>
> @@ -220,11 +237,9 @@ void intel_engines_driver_register(struct
> drm_i915_private *i915)
> i915->engine_uabi_class_count[engine->uabi_class]++;
>
> /* Replace the internal name with the final user facing name */
> - memcpy(old, engine->name, sizeof(engine->name));
> - scnprintf(engine->name, sizeof(engine->name), "%s%u",
> - intel_engine_class_repr(engine->class),
> - engine->uabi_instance);
> - DRM_DEBUG_DRIVER("renamed %s to %s\n", old, engine->name);
> + engine_rename(engine,
> + intel_engine_class_repr(engine->class),
> + engine->uabi_instance);
>
> rb_link_node(&engine->uabi_node, prev, p);
> rb_insert_color(&engine->uabi_node, &i915->uabi_engines);
> --
> 2.37.3
>
--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
