tree 931e72fdf65dbfde58b84ee4de4d7cb1f360dbcf
parent 7907cf80049df56d7a8f66c91626154986fa59e2
author Baruch Siach <baruch@tkos.co.il> 1698221324 +0300
committer Tom Rini <trini@konsulko.com> 1699218698 -0500

net: designware: add DMA offset awareness

Older DesignWare Ethernet MAC versions that this driver supports can
only work with 32-bit DMA source/destination addresses. Some platforms
have no physical RAM at the lowest 4GB address space. For these
platforms the driver must translate DMA addresses to/from physical
memory addresses.

Call translation routines so that properly configured platforms can use
the DesignWare Ethernet MAC. For platforms using device-tree this
usually means adding dma-ranges property to the bus the device node is
in.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>