Hi Jisheng, On Fri, Apr 03, 2015 at 10:46:21AM +0100, Jisheng Zhang wrote: > Hi all, > > Currently, the pci designware driver still lacks of arm64 support and I noticed > that many works are done to achieve this goal. > > Some patches are merged and some are under discussion. And Per my understanding, > even w/ these patches merged, the driver still doesn't support arm64. Could you > please kindly point out the direction to add arm64 support to the PCIe > designware driver? We should remove pci_sys_data dependency since ARM depends on that. I removed it from a couple of places already (eg pci_mmap_page_range). Now, pcibios_align_resource and pcibios_msi_controller need patching. I have a patch for pcibios_align_resource() (I am waiting for Yijing Wang series to get merged so that we can move the align_resource function pointer in the host bridge): https://lkml.org/lkml/2015/4/3/171 For MSI, code converted to use CONFIG_PCI_MSI_IRQ_DOMAIN should not need pcibios_msi_controller ARM function, but if we still compile that function in we do need pci_sys_data on ARM, so we have to have it even if it can be dead code in some platforms, I have to vet all ARM PCI host controllers to check, but removing it would break MSI support. Does it help ? MSIs are the most important change required, align_resource() pointer can be sorted out easily once Yijing's code gets in. Lorenzo -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
