[PATCH 6/8] drm/amdkfd: New IOCTL to allocate queue GWS

Kuehling, Felix Felix.Kuehling at amd.com
Fri May 31 20:04:11 UTC 2019

On 2019-05-30 11:13 p.m., Dave Airlie wrote:
> On Sat, 25 May 2019 at 05:48, Kuehling, Felix <Felix.Kuehling at amd.com> wrote:
>> On 2019-05-23 6:41 p.m., Zeng, Oak wrote:
>>> Add a new kfd ioctl to allocate queue GWS. Queue
>>> GWS is released on queue destroy.
>>> Change-Id: I60153c26a577992ad873e4292e759e5c3d5bbd15
>>> Signed-off-by: Oak Zeng <Oak.Zeng at amd.com>
>> Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>
> btw just noticed in passing we are adding new features to kfd, is
> there an open source developed userspace to go along with this, there
> needs to a dev branch in public before new ioctls/uapi surfaces should
> be added to the kernel.
> The commits should probably have pointers to that branch.

Ah, a chicken and egg problem. I think this is the first time we're 
adding a new ioctl to upstream KFD rather than upstreaming one that's 
been developed internally first. Maybe not the right way to do it.

I should be able to publish the user mode code in libhsakmt next week. 
Then we'll work on a kfdtest to validate the firmware functionality. 
Finally we'll use GWS further up the software stack for synchronization 
of concurrent compute workgroups.


> Dave.

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