On 30/08/2016 09:18, Chris Wilson wrote:
Now that the user can opt-out of implicit fencing, we need to give them
back control over the fencing. We employ sync_file to wrap our
drm_i915_gem_request and provide an fd that userspace can merge with
other sync_file fds and pass back to the kernel to wait upon before
future execution.
+ args->rsvd2 &= ~((u64)0xffffffff << 32);
+ args->rsvd2 |= (u64)out_fence_fd << 32;
I didn't see a response to the suggestion of renaming rsvd2 to something
more useful or even replacing it with a pair of u32 values instead. At
the very least, I think it is worth adding a comment to the structure
declaration to say that the field is actually in use for something now.
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