RE: [RFC PATCH 0/3] prerequisites for device reserved local mem rework

[Laurentiu Tudor]

Hi Robin,

> -----Original Message-----
> From: Robin Murphy <robin.murphy@xxxxxxx>
> Sent: Friday, May 10, 2019 6:04 PM
> 
> Hi Laurentiu,
> 
> On 10/05/2019 15:56,  wrote:
> > From: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>
> >
> > For HCs that have local memory, replace the current DMA API usage
> > with a genalloc generic allocator to manage the mappings for these
> > devices.
> > This is in preparation for dropping the existing "coherent" dma
> > mem declaration APIs. Current implementation was relying on a short
> > circuit in the DMA API that in the end, was acting as an allocator
> > for these type of devices.
> >
> > Only compiled tested, so any volunteers willing to test are most welcome.
> 
> Based on my diggings into this in the past, I would expect that you need
> to do something about hcd_alloc_coherent() as well.

Indeed looks like it. Thanks a lot for the pointer, I'll dig into it.

---
Best Regards, Laurentiu

> 
> >
> > Thank you!
> >
> > For context, see thread here:
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org
> %2Flkml%2F2019%2F4%2F22%2F357&amp;data=02%7C01%7Claurentiu.tudor%40nxp.com
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> DS%2Fotl4%3D&amp;reserved=0
> >
> > Laurentiu Tudor (3):
> >    ohci-hcd: use genalloc for USB HCs with local memory
> >    usb: host: ohci-sm501: init genalloc for local memory
> >    usb: host: ohci-tmio: init genalloc for local memory
> >
> >   drivers/usb/host/ohci-hcd.c   | 21 +++++++++---
> >   drivers/usb/host/ohci-sm501.c | 63 +++++++++++++++++++----------------
> >   drivers/usb/host/ohci-tmio.c  | 23 ++++++++-----
> >   drivers/usb/host/ohci.h       |  3 ++
> >   4 files changed, 69 insertions(+), 41 deletions(-)
> >