From 5106787a9e08dc2901d6b2513ed8f377671befa8 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 27 Nov 2014 09:54:09 +0100 Subject: [PATCH] PCI: tegra: Use physical range for I/O mapping Commit 0b0b0893d49b ("of/pci: Fix the conversion of IO ranges into IO resources") changed how I/O resources are parsed from DT. Rather than containing the physical address of the I/O region, the addresses will now be in I/O address space. On Tegra the union of all ranges is used to expose a top-level memory- mapped resource for the PCI host bridge. This helps to make /proc/iomem more readable. Combining both of the above, the union would now include the I/O space region. This causes a regression on Tegra20, where the physical base address of the PCIe controller (and therefore of the union) is located at physical address 0x80000000. Since I/O space starts at 0, the union will now include all of system RAM which starts at 0x00000000. This commit fixes this by keeping two copies of the I/O range: one that represents the range in the CPU's physical address space, the other for the range in the I/O address space. This allows the translation setup within the driver to reuse the physical addresses. The code registering the I/O region with the PCI core uses both ranges to establish the mapping. Fixes: 0b0b0893d49b ("of/pci: Fix the conversion of IO ranges into IO resources") Reported-by: Marc Zyngier Tested-by: Marc Zyngier Suggested-by: Arnd Bergmann Signed-off-by: Thierry Reding Signed-off-by: Bjorn Helgaas Reviewed-by: Arnd Bergmann --- Reading git-format-patch failed