[Intel-gfx] [PATCH 7/7] drm/i915/gem: Acquire all vma/objects under reservation_ww_class

[Thomas Hellström (Intel)]

Hi, Chris!

On 6/22/20 11:59 AM, Chris Wilson wrote:
> In order to actually handle eviction and what not, we need to process
> all the objects together under a common lock, reservation_ww_class. As
> such, do a memory reservation pass after looking up the object/vma,
> which then feeds into the rest of execbuf [relocation, cmdparsing,
> flushing and ofc execution].
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>   .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 91 ++++++++++++++-----
>   1 file changed, 70 insertions(+), 21 deletions(-)
>
Which tree is this against? The series doesn't apply cleanly against 
drm-tip?

...

> +static int eb_reserve_mm(struct i915_execbuffer *eb)
> +{
> +	const u64 idx = eb->context->timeline->fence_context;
> +	struct ww_acquire_ctx acquire;
> +	struct eb_vma *ev;
> +	int err;
> +
> +	eb->mm_fence = __dma_fence_create_proxy(0, 0);
> +	if (!eb->mm_fence)
> +		return -ENOMEM;

Where are the proxy fence functions defined?

Thanks,

Thomas