On ke, 2017-05-31 at 10:35 +0800, Weinan Li wrote:
> I915_GEM_GET_APERTURE ioctl is used to probe aperture size from userspace.
> In gvt environment, each vm only use the ballooned part of aperture, so we
> should return the correct available aperture size exclude the reserved part
> by balloon.
>
> v2: add 'reserved' in struct i915_address_space to record the reserved size
> in ggtt (Chris)
>
> v3: remain aper_size as total, adjust aper_available_size exclude reserved
> and pinned. UMD driver need to adjust the max allocation size according to
> the available aperture size but not total size. KMD return the correct
> usable aperture size any time (Chris, Joonas)
>
> v4: decrease reserved in deballoon (Joonas)
>
> v5: add onion teardown in balloon, add vgt_deballoon_space (Joonas)
>
> v6: change title name (Zhenyu)
>
> v7: code style refine (Joonas)
>
> Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Suggested-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
> Signed-off-by: Weinan Li <weinan.z.li@xxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Comment below for Chris, if you don't merging this.
<SNIP>
> @@ -127,9 +134,12 @@ static int vgt_balloon_space(struct i915_ggtt *ggtt,
>
> DRM_INFO("balloon space: range [ 0x%lx - 0x%lx ] %lu KiB.\n",
> start, end, size / 1024);
> - return i915_gem_gtt_reserve(&ggtt->base, node,
> + ret = i915_gem_gtt_reserve(&ggtt->base, node,
> size, start, I915_COLOR_UNEVICTABLE,
> 0);
> + if (!ret)
> + ggtt->base.reserved += size;
Add newline here while applying the patch.
Regards, Joonas
> + return ret;
> }
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
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