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drm/i915: Re-expose SINGLE_TIMELINE flags for context creation 

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@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190521211134.16117-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-05-21 22:11:28 +01:00
parent e620f7b3a2
commit 8319f44c05
2 changed files with 2 additions and 5 deletions
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4
drivers/gpu/drm/i915/i915_gem_context.c
View File

@ -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 {
@ -505,8 +503,6 @@ 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);

3
include/uapi/drm/i915_drm.h
View File

@ -1469,8 +1469,9 @@ 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;
};