Messages in this thread | | | Subject | Re: [RFC 0/2] staging: ion: of_ion_device_get | From | Laura Abbott <> | Date | Tue, 22 Mar 2016 15:51:39 -0700 |
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On 03/22/2016 03:33 PM, Moritz Fischer wrote: > Hi all, > > probably I'm doing this all wrong. I'm playing around with a bunch of accelerators > and I need to share buffers between them. I have my heaps implemented as a > platform device and from what I understand I'll need a reference to the > struct ion_device in each of them. > I couldn't find a way to get to that via devicetree, though. I'll admit that hacking > up miscdevice is quite hacky, maybe I should add a foo_get_ion_device() to my > heap implementing platform device? > If someone can explain me how to correctly do that with what we currently have, > even better. > > Cheers, > > Moritz > > Moritz Fischer (2): > misc: Add of_get_misc get a reference from devicetree > staging: android: ion: Add of_ion_device_get function > > drivers/char/misc.c | 38 ++++++++++++++++++++++++++++++++++++++ > drivers/staging/android/ion/ion.c | 10 ++++++++++ > include/linux/miscdevice.h | 3 +++ > 3 files changed, 51 insertions(+) >
In the past what drivers have done is a foo_ion_client_create which has the reference to the ion_device created from ion_device_create. Drivers then call the foo_ion_client_create function.
Can you elaborate more on your sharing and allocation flow? This might suggest another idea.
Thanks, Laura
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