The SINGLE_TIMELINE flag can be used to create a context such that all
engine instances within that context share a common timeline. This can
be useful for mixing operations between real and virtual engines, or
when using a composite context for a single client API context.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_context.c | 4 ----
include/uapi/drm/i915_drm.h | 3 ++-
2 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 5c8fed7717f6..4909acbeee23 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -96,8 +96,6 @@
#include "i915_trace.h"
#include "i915_user_extensions.h"
-#define I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE (1 << 1)
-
#define ALL_L3_SLICES(dev) (1 << NUM_L3_SLICES(dev)) - 1
static struct i915_global_gem_context {
@@ -496,8 +494,6 @@ i915_gem_create_context(struct drm_i915_private *dev_priv, unsigned int flags)
lockdep_assert_held(&dev_priv->drm.struct_mutex);
- BUILD_BUG_ON(I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE &
- ~I915_CONTEXT_CREATE_FLAGS_UNKNOWN);
if (flags & I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE &&
!HAS_EXECLISTS(dev_priv))
return ERR_PTR(-EINVAL);
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index ab30bcd7c1f1..303d3dd980e4 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1458,8 +1458,9 @@ struct drm_i915_gem_context_create_ext {
__u32 ctx_id; /* output: id of new context*/
__u32 flags;
#define I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS (1u << 0)
+#define I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE (1u << 1)
#define I915_CONTEXT_CREATE_FLAGS_UNKNOWN \
- (-(I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS << 1))
+ (-(I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE << 1))
__u64 extensions;
};
--
2.20.1
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