On Mon, Feb 06, 2023 at 08:41:43AM -0700, Jeffrey Hugo wrote: > From: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@xxxxxxxxxxx> > > Some of the MHI channels for an AIC100 device need to be routed to > userspace so that userspace can communicate directly with QSM. The MHI > bus does not support this, and while the WWAN subsystem does (for the same > reasons), AIC100 is not a WWAN device. Also, MHI is not something that > other accelerators are expected to share, thus an accel subsystem function > that meets this usecase is unlikely. > > Create a QAIC specific MHI userspace shim that exposes these channels. > > Start with QAIC_SAHARA which is required to boot AIC100 and is consumed by > the kickstart application as documented in aic100.rst > > Each AIC100 instance (currently, up to 16) in a system will create a > chardev for QAIC_SAHARA. This chardev will be found as > /dev/<mhi instance>_QAIC_SAHARA > For example - /dev/mhi0_QAIC_SAHARA > > Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@xxxxxxxxxxx> > Signed-off-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx> > Reviewed-by: Carl Vanderlip <quic_carlv@xxxxxxxxxxx> Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@xxxxxxxxxxxxxxx>
