[Beignet] [Intel-gfx] [PATCH 1/2 v2] intel: Export total subslice and EU counts
Damien Lespiau
damien.lespiau at intel.com
Wed Mar 18 11:18:31 PDT 2015
On Mon, Mar 09, 2015 at 04:13:03PM -0700, jeff.mcgee at intel.com wrote:
> From: Jeff McGee <jeff.mcgee at intel.com>
>
> Update kernel interface with new I915_GETPARAM ioctl entries for
> subslice total and EU total. Add a wrapping function for each
> parameter. Userspace drivers need these values when constructing
> GPGPU commands. This kernel query method is intended to replace
> the PCI ID-based tables that userspace drivers currently maintain.
> The kernel driver can employ fuse register reads as needed to
> ensure the most accurate determination of GT config attributes.
> This first became important with Cherryview in which the config
> could differ between devices with the same PCI ID.
>
> The kernel detection of these values is device-specific. Userspace
> drivers should continue to maintain ID-based tables for older
> devices which return ENODEV when using this query.
>
> v2: remove unnecessary include of <stdbool.h> and increment the
> I915_GETPARAM indices to match updated kernel patch.
>
> For: VIZ-4636
> Signed-off-by: Jeff McGee <jeff.mcgee at intel.com>
Pushed to libdrm.
--
Damien
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