From: Sourab Gupta <sourab.gupta@xxxxxxxxx>
This patch adds a new ctx getparam ioctl parameter, which can be used to
retrieve ctx global_id for any particular ctx by userspace.
This can be used by userspace to map the i915 perf samples with their
particular ctx's, since those would be having ctx global_id's.
Otherwise the userspace has no way of maintaining this association,
since it has the knowledge of only per-drm file specific ctx handles.
Signed-off-by: Sourab Gupta <sourab.gupta@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_context.c | 3 +++
include/uapi/drm/i915_drm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 6db5e3a..83d0d34 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -987,6 +987,9 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
else
args->value = to_i915(dev)->ggtt.base.total;
break;
+ case I915_CONTEXT_PARAM_GLOBAL_ID:
+ args->value = ctx->global_id;
+ break;
default:
ret = -EINVAL;
break;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 4a1bcfd8..7e24ec4 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1171,6 +1171,7 @@ struct drm_i915_gem_context_param {
#define I915_CONTEXT_PARAM_BAN_PERIOD 0x1
#define I915_CONTEXT_PARAM_NO_ZEROMAP 0x2
#define I915_CONTEXT_PARAM_GTT_SIZE 0x3
+#define I915_CONTEXT_PARAM_GLOBAL_ID 0x4
__u64 value;
};
--
1.9.1
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