• Arnd Bergmann's avatar
    ARM: footbridge: remove custom DMA address handling · be7f3f90
    Arnd Bergmann authored
    Footbridge is the last Arm platform that has its own
    __virt_to_bus()/__bus_to_virt()/phys_to_dma()/dma_to_phys() abstraction,
    but this is just a simple offset now.
    
    For PCI devices, the offset that is programmed into the PCI bridge must
    also be set in each device using dma_direct_set_offset().  As Arm does
    not have a pcibios_bus_add_device() helper yet, just use a bus notifier
    for this.
    
    For the ISA DMA, drivers now pass a non-translated physical address into
    set_dma_addr(), so they have to be converted back with the corresponding
    isa_bus_to_virt() function and then into the correct bus address with
    the offset using the isa_dma_dev.
    Tested-by: default avatarMarc Zyngier <maz@kernel.org>
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    be7f3f90
dma-isa.c 5.2 KB