The Q6 modem sub-system has direct access to DDR through memnoc and
an indirect access routed through a SMMU which MSS CE (crypto engine
sub-component of MSS) uses during out of reset sequence. Request direct
mapping for the modem-firmware subdevice since smmu is not expected
to provide access control/translation for these SIDs (sandboxing of the
modem is achieved through XPUs engaged using SMC calls).
Sibi Sankar (3):
iommu: Export "iommu_request_dm_for_dev"
dt-bindings: remoteproc: qcom: Add modem-firmware bindings
remoteproc: qcom_q6v5_mss: Request direct mapping for firmware
subdevice
.../bindings/remoteproc/qcom,q6v5.txt | 4 ++
drivers/iommu/iommu.c | 1 +
drivers/remoteproc/qcom_q6v5_mss.c | 68 +++++++++++++++++++
3 files changed, 73 insertions(+)
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
