Hi Daniel,
On 10/1/20 10:48 AM, Daniel Vetter wrote:
On Wed, Sep 30, 2020 at 01:53:46PM +0200, Alexandre Bailon wrote:
This adds a RPMsg driver that implements communication between the CPU and an
APU.
This uses VirtIO buffer to exchange messages but for sharing data, this uses
a dmabuf, mapped to be shared between CPU (userspace) and APU.
The driver is relatively generic, and should work with any SoC implementing
hardware accelerator for AI if they use support remoteproc and VirtIO.
For the people interested by the firmware or userspace library,
the sources are available here:
https://github.com/BayLibre/open-amp/tree/v2020.01-mtk/apps/examples/apu
Since this has open userspace (from a very cursory look), and smells very
much like an acceleration driver, and seems to use dma-buf for memory
management: Why is this not just a drm driver?
I have never though to DRM since for me it was only a RPMsg driver.
I don't know well DRM. Could you tell me how you would do it so I could
have a look ?
Thanks,
Alexandre
-Daniel
Alexandre Bailon (3):
Add a RPMSG driver for the APU in the mt8183
rpmsg: apu_rpmsg: update the way to store IOMMU mapping
rpmsg: apu_rpmsg: Add an IOCTL to request IOMMU mapping
Julien STEPHAN (1):
rpmsg: apu_rpmsg: Add support for async apu request
drivers/rpmsg/Kconfig | 9 +
drivers/rpmsg/Makefile | 1 +
drivers/rpmsg/apu_rpmsg.c | 752 +++++++++++++++++++++++++++++++++
drivers/rpmsg/apu_rpmsg.h | 52 +++
include/uapi/linux/apu_rpmsg.h | 47 +++
5 files changed, 861 insertions(+)
create mode 100644 drivers/rpmsg/apu_rpmsg.c
create mode 100644 drivers/rpmsg/apu_rpmsg.h
create mode 100644 include/uapi/linux/apu_rpmsg.h
--
2.26.2
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