The per-device heaps don't support HEAP_QUERY ioctl, since
the name is provided in the devnode path and the heapid isn't
useful with the new interface (one uses the fd of heapdevice).
But, one missing bit of functionality is a way to find the
heap type. So provide a HEAP_INFO ioctl which exposes t
On Fri, Feb 15, 2019 at 2:51 AM Brian Starkey wrote:
>
> Hi John,
>
> On Thu, Feb 14, 2019 at 09:38:29AM -0800, John Stultz wrote:
> >
> [snip]
>
> > Some thoughts, as this ABI break has the potential to be pretty painful.
> >
> > 1) Unfortunately, this ABI is exposed *through* libion via
> > ion_
This is a *very early RFC* (it builds, that's all I'll say :)
but I wanted to share it to get some initial feedback before I
go down the rabit hole of trying to adapt the Android userland
code to get this fully validated.
This patchset tries to implement the per-heap devices for ION.
The main bene
With all the slight interface changes ion has had
through its time in staging, keeping userland working
properly has been a pain. Assuming more churn going
forward, provide a proper version interface.
Cc: Laura Abbott
Cc: Sumit Semwal
Cc: Liam Mark
Cc: Brian Starkey
Cc: Andrew F. Davis
Cc: Al
On Fri, Feb 15, 2019 at 12:52 PM Andrew F. Davis wrote:
> On 2/15/19 1:58 PM, John Stultz wrote:
> > So yea, I don't think we should tie our hands in reworking the
> > interfaces, but it would be nice to avoid having subtle ABI changes
> > that don't have clear ways for userland to detect which in
Add a config option to make the "legacy" /dev/ion
interface optional.
Not yet clear if this will come out of staging or
not, but to help with the transition.
Cc: Laura Abbott
Cc: Sumit Semwal
Cc: Liam Mark
Cc: Brian Starkey
Cc: Andrew F. Davis
Cc: Alistair Strachan
Cc: dri-devel@lists.freed
On Fri, Feb 15, 2019 at 11:22 AM Andrew F. Davis wrote:
>
> On 2/15/19 1:01 PM, John Stultz wrote:
> > On Fri, Feb 15, 2019 at 2:51 AM Brian Starkey wrote:
> >> On Thu, Feb 14, 2019 at 09:38:29AM -0800, John Stultz wrote:
> >>> 2) For patches that cause ABI breaks, it might be good to make it
> >
One of the issues w/ the /dev/ion interface is that we have to
provide the complexity of a heap query interface and we end up
multiplexing all the heap access through that one interface via
a bit mask (which currently limits the heaps to 32).
There has been a long running todo to provide per-heap
On Mon, Jan 28, 2019 at 1:44 PM Andrew F. Davis wrote:
>
> Previously the heap to allocate from was selected by a mask of allowed
> heap types. This may have been done as a primitive form of constraint
> solving, the first heap type that matched any set bit of the heap mask
> was allocated from, u
