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drm/i915: add support for perf configuration queries

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Listing configurations at the moment is supported only through sysfs.
This might cause issues for applications wanting to list
configurations from a container where sysfs isn't available.

This change adds a way to query the number of configurations and their
content through the i915 query uAPI.

v2: Fix sparse warnings (Lionel)
    Add support to query configuration using uuid (Lionel)

v3: Fix some inconsistency in uapi header (Lionel)
    Fix unlocking when not locked issue (Lionel)
    Add debug messages (Lionel)

v4: Fix missing unlock (Dan)

v5: Drop lock when copying config content to userspace (Chris)

v6: Drop lock when copying config list to userspace (Chris)
    Fix deadlock when calling i915_perf_get_oa_config() under
    perf.metrics_lock (Lionel)
    Add i915_oa_config_get() (Chris)

Link: https://gitlab.freedesktop.org/mesa/mesa/merge_requests/932
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191014201404.22468-2-chris@chris-wilson.co.uk
This commit is contained in:
Lionel Landwerlin
2019-10-14 21:14:02 +01:00
committed by Chris Wilson
parent b8d49f28aa
commit 4f6ccc74a8
3 changed files with 358 additions and 3 deletions
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3
drivers/gpu/drm/i915/i915_perf.c
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@@ -3806,8 +3806,7 @@ int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
GEM_BUG_ON(*arg != oa_config->id);
sysfs_remove_group(perf->metrics_kobj,
&oa_config->sysfs_metric);
sysfs_remove_group(perf->metrics_kobj, &oa_config->sysfs_metric);
idr_remove(&perf->metrics_idr, *arg);