proxmox-mirrors/mirror_ubuntu-kernels
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_ubuntu-kernels.git synced 2026-01-05 21:31:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

dt-bindings: PCI: dwc: Add dma-coherent property

Browse Source 
DW PCIe EP/RP AXI- and TRGT1-master interfaces are responsible for the
application memory access. They are used by the RP/EP PCIe buses (MWr/MWr
TLPs emitted by the peripheral PCIe devices) and the eDMA block. Since all
of them mainly involve the system memory and basically mean DMA we can
expect the corresponding platforms can be designed in a way to make sure
the transactions are cache-coherent. As such the DW PCIe DT-nodes can have
the 'dma-coherent' property specified. Let's permit it in the DT-bindings
then.

Link: https://lore.kernel.org/r/20221113191301.5526-13-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Serge Semin 2022-11-13 22:12:53 +03:00 committed by Lorenzo Pieralisi
parent bd9504af91
commit 4a8972542a
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml
View File

@ -259,6 +259,8 @@ properties:
configuration space registers, Port Logic registers, DMA and iATU
registers. This feature has been available since DWC PCIe v4.80a.
dma-coherent: true
additionalProperties: true
...