PCI: qcom: Add support for configuring BDF to SID mapping for SM8250

Browse source

For SM8250, we need to write the BDF to SID mapping in PCIe controller
register space for proper working. This is accomplished by extracting
the BDF and SID values from "iommu-map" property in DT and writing those
in the register address calculated from the hash value of BDF. In case
of collisions, the index of the next entry will also be written.

For the sake of it, let's introduce a "config_sid" callback and do it
conditionally for SM8250.

Link: https://lore.kernel.org/r/20201208121402.178011-4-mani@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

...

This commit is contained in:

Manivannan Sadhasivam 2020-12-08 17:44:02 +05:30 • committed by Lorenzo Pieralisi

parent e1dd639e37

commit 4c93988221

2 changed files with 89 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/pci/controller/dwc/Kconfig

View file

88

drivers/pci/controller/dwc/pcie-qcom.c

View file