linux-kernel - [PATCH 0/3] Request direct mapping for modem firmware subdevice

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Message-Id: <20200309182255.20142-1-sibis@codeaurora.org>
Date:   Mon,  9 Mar 2020 23:52:52 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org, robh+dt@...nel.org, joro@...tes.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-remoteproc@...r.kernel.org, ohad@...ery.com,
        agross@...nel.org, Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH 0/3] Request direct mapping for modem firmware subdevice

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(+)

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