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drm/i915: Expose logical engine instance to user 

Expose logical engine instance to user via query engine info IOCTL. This
is required for split-frame workloads as these needs to be placed on
engines in a logically contiguous order. The logical mapping can change
based on fusing. Rather than having user have knowledge of the fusing we
simply just expose the logical mapping with the existing query engine
info IOCTL.

IGT: https://patchwork.freedesktop.org/patch/445637/?series=92854&rev=1
media UMD: https://github.com/intel/media-driver/pull/1252

v2:
 (Daniel Vetter)
  - Add IGT link, placeholder for media UMD

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211014172005.27155-7-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2021-10-14 10:19:46 -07:00 committed by John Harrison
parent 4f3059dc2d
commit 9409eb3594
2 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/i915_query.c
View File

@ -124,7 +124,9 @@ query_engine_info(struct drm_i915_private *i915,
for_each_uabi_engine(engine, i915) {
info.engine.engine_class = engine->uabi_class;
info.engine.engine_instance = engine->uabi_instance;
info.flags = I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE;
info.capabilities = engine->uabi_capabilities;
info.logical_instance = ilog2(engine->logical_mask);
if (copy_to_user(info_ptr, &info, sizeof(info)))
return -EFAULT;

8
include/uapi/drm/i915_drm.h
View File

@ -2775,14 +2775,20 @@ struct drm_i915_engine_info {
/** @flags: Engine flags. */
__u64 flags;
#define I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE (1 << 0)
/** @capabilities: Capabilities of this engine. */
__u64 capabilities;
#define I915_VIDEO_CLASS_CAPABILITY_HEVC (1 << 0)
#define I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC (1 << 1)
/** @logical_instance: Logical instance of engine */
__u16 logical_instance;
/** @rsvd1: Reserved fields. */
__u64 rsvd1[4];
__u16 rsvd1[3];
/** @rsvd2: Reserved fields. */
__u64 rsvd2[3];
};
/**