+Stefan
On Fri, Nov 20, 2020 at 1:49 AM Nicolas Saenz Julienne nsaenzjulienne@suse.de wrote:
So far we've been content with passing physical addresses when configuring memory addresses into XHCI controllers, but not all platforms have buses with transparent mappings. Specifically the Raspberry Pi 4 might introduce an offset to memory accesses incoming from its PCIe port.
Introduce xhci_virt_to_bus() and xhci_bus_to_virt() to cater with these limitations and make sure we don't break non DM users.
I believe this was already addressed by Stefan before, to support xHCI in MIPS.
Signed-off-by: Nicolas Saenz Julienne nsaenzjulienne@suse.de
drivers/usb/host/xhci-mem.c | 45 +++++++++++++++++++----------------- drivers/usb/host/xhci-ring.c | 11 +++++---- drivers/usb/host/xhci.c | 4 ++-- include/usb/xhci.h | 22 +++++++++++++++++- 4 files changed, 54 insertions(+), 28 deletions(-)
Regards, Bin