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drm/i915: Introduce struct class_instance for engines across the uAPI

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SSEU reprogramming of the context introduced the notion of engine class
and instance for a forwards compatible method of describing any engine
beyond the old execbuf interface. We wish to adopt this class:instance
description for more interfaces, so pull it out into a separate type for
userspace convenience.

Fixes: e46c2e99f6 ("drm/i915: Expose RPCS (SSEU) configuration to userspace (Gen11 only)")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Lionel Landwerlin <[email protected]>
Cc: Dmitry Rogozhkin <[email protected]>
Cc: Tony Ye <[email protected]>
Cc: Andi Shyti <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Acked-by: Tony Ye <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Chris Wilson committed 2019-04-17 07:25:42 +01:00
1 parent b16b2a2f70
commit d1172ab3d4
2 files changed
+17 -6
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drivers/gpu/drm/i915/i915_gem_context.c
+4 -4
View File
@@ -1386,8 +1386,8 @@ static int set_sseu(struct i915_gem_context *ctx,
return -EINVAL;
engine = intel_engine_lookup_user(i915,
user_sseu.engine_class,
user_sseu.engine_instance);
user_sseu.engine.engine_class,
user_sseu.engine.engine_instance);
if (!engine)
return -EINVAL;
@@ -1626,8 +1626,8 @@ static int get_sseu(struct i915_gem_context *ctx,
return -EINVAL;
engine = intel_engine_lookup_user(ctx->i915,
user_sseu.engine_class,
user_sseu.engine_instance);
user_sseu.engine.engine_class,
user_sseu.engine.engine_instance);
if (!engine)
return -EINVAL;
include/uapi/drm/i915_drm.h
+13 -2
View File
@@ -126,6 +126,18 @@ enum drm_i915_gem_engine_class {
I915_ENGINE_CLASS_INVALID = -1
};
/*
* There may be more than one engine fulfilling any role within the system.
* Each engine of a class is given a unique instance number and therefore
* any engine can be specified by its class:instance tuplet. APIs that allow
* access to any engine in the system will use struct i915_engine_class_instance
* for this identification.
*/
struct i915_engine_class_instance {
__u16 engine_class; /* see enum drm_i915_gem_engine_class */
__u16 engine_instance;
};
/**
* DOC: perf_events exposed by i915 through /sys/bus/event_sources/drivers/i915
*
@@ -1525,8 +1537,7 @@ struct drm_i915_gem_context_param_sseu {
/*
* Engine class & instance to be configured or queried.
*/
__u16 engine_class;
__u16 engine_instance;
struct i915_engine_class_instance engine;
/*
* Unused for now. Must be cleared to zero.