On Fri, Oct 18, 2019 at 01:00:44PM +0200, Nicolas Saenz Julienne wrote: > The devices found behind this PCIe chip have unusual DMA mapping > constraints as there is an AMBA interconnect placed in between them and > the different PCI endpoints. The offset between physical memory > addresses and AMBA's view is provided by reading a PCI config register, > which is saved and used whenever DMA mapping is needed. > > It turns out that this DMA setup can be represented by properly setting > 'dma_pfn_offset', 'dma_bus_mask' and 'dma_mask' during the PCI device > enable fixup. And ultimately allows us to get rid of this device's > custom DMA functions. > > Aside from the code deletion and DMA setup, sta2x11_pdev_to_mapping() is > moved to avoid warnings whenever CONFIG_PM is not enabled. Looks sensible to me: Reviewed-by: Christoph Hellwig <hch@xxxxxx> But I can't tested it either, and kinda wonder if this code is actually still used by anyone..
