On 8/16/24 01:57, Jim Quinlan wrote: > Provide support for new chips with multiple inbound windows while > keeping the legacy support for the older chips. > > In existing chips there are three inbound windows with fixed purposes: the > first was for mapping SoC internal registers, the second was for memory, > and the third was for memory but with the endian swapped. Typically, only > one window was used. > > Complicating the inbound window usage was the fact that the PCIe HW would > do a baroque internal mapping of system memory, and concatenate the regions > of multiple memory controllers. > > Newer chips such as the 7712 and Cable Modem SOCs take a step forward and > drop the internal mapping while providing for multiple inbound windows. > This works in concert with the dma-ranges property, where each provided > range becomes an inbound window. > > Signed-off-by: Jim Quinlan <james.quinlan@xxxxxxxxxxxx> > --- > drivers/pci/controller/pcie-brcmstb.c | 235 ++++++++++++++++++++------ > 1 file changed, 181 insertions(+), 54 deletions(-) Reviewed-by: Stanimir Varbanov <svarbanov@xxxxxxx> ~Stan
