On 14 March 2014 21:04, Liviu Dudau <Liviu.Dudau@xxxxxxx> wrote: > Hi, > > This patch adds support for PCI to AArch64. It is based on my v7 patch > that adds support for creating generic host bridge structure from > device tree. With that in place, I was able to boot a platform that > has PCIe host bridge support and use a PCIe network card. Hi Liviu, Are these patches (including your other patchset for device tree host bridge support ) available on a public git repo I can checkout from? Thanks, ~Sandeepa > > I have dropped the RFC tag from the subject as I now have the ambitious goal > of trying to get it mainlined. > > Changes from v6: > - Guard the pci_domain_nr() inline implementation with #ifdef CONFIG_PCI as > to avoid conflict with default empty version present in include/linux/pci.h. > Thanks to Jingoo Han for catching this. > > Changes from v5: > - Removed pcibios_fixup_bridge_ranges() as the week default version is fine. > - Removed the ALIGN() call in pcibios_align_resource() > - Stopped exporting pcibios_align_resource() > > Changes from v4: > - Fixed the pci_domain_nr() implementation for arm64. Now we use > find_pci_host_bride() to find the host bridge before we retrieve > the domain number. > > Changes from v3: > - Added Acks accumulated so far ;) > - Still carrying Catalin's patch for moving the PCI_IO_BASE until it > lands in linux-next or mainline, in order to ease applying the series > > Changes from v2: > - Implement an arch specific version of pci_register_io_range() and > pci_address_to_pio(). > - Return 1 from pci_proc_domain(). > > Changes from v1: > - Added Catalin's patch for moving the PCI_IO_BASE location and extend > its size to 16MB > - Integrated Arnd's version of pci_ioremap_io that uses a bitmap for > keeping track of assigned IO space and returns an io_offset. At the > moment the code is added in arch/arm64 but it can be moved in drivers/pci. > - Added a fix for the generic ioport_map() function when !CONFIG_GENERIC_IOMAP > as suggested by Arnd. > > v6 thread here: https://lkml.org/lkml/2014/3/5/41 > v5 thread here: https://lkml.org/lkml/2014/3/4/307 > v4 thread here: https://lkml.org/lkml/2014/3/3/298 > v3 thread here: https://lkml.org/lkml/2014/2/28/211 > v2 thread here: https://lkml.org/lkml/2014/2/27/255 > v1 thread here: https://lkml.org/lkml/2014/2/3/389 > > > The API used is different from the one used by ARM architecture. There is > no pci_common_init_dev() function and no hw_pci structure, as that is no > longer needed. Once the last signature is added to the legal agreement, I > will post the host bridge driver code that I am using. Meanwhile, here > is an example of what the probe function looks like, posted as an example: > > static int myhostbridge_probe(struct platform_device *pdev) > { > int err; > struct device_node *dev; > struct pci_host_bridge *bridge; > struct myhostbridge_port *pp; > resource_size_t lastbus; > > dev = pdev->dev.of_node; > > if (!of_device_is_available(dev)) { > pr_warn("%s: disabled\n", dev->full_name); > return -ENODEV; > } > > pp = kzalloc(sizeof(struct myhostbridge_port), GFP_KERNEL); > if (!pp) > return -ENOMEM; > > bridge = of_create_pci_host_bridge(&pdev->dev, &myhostbridge_ops, pp); > if (IS_ERR(bridge)) { > err = PTR_ERR(bridge); > goto bridge_create_fail; > } > > err = myhostbridge_setup(bridge->bus); > if (err) > goto bridge_setup_fail; > > /* We always enable PCI domains and we keep domain 0 backward > * compatible in /proc for video cards > */ > pci_add_flags(PCI_ENABLE_PROC_DOMAINS); > pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC); > > lastbus = pci_scan_child_bus(bridge->bus); > pci_bus_update_busn_res_end(bridge->bus, lastbus); > > pci_assign_unassigned_bus_resources(bridge->bus); > > pci_bus_add_devices(bridge->bus); > > return 0; > > bridge_setup_fail: > put_device(&bridge->dev); > device_unregister(&bridge->dev); > bridge_create_fail: > kfree(pp); > return err; > } > > Best regards, > Liviu > > > Catalin Marinas (1): > arm64: Extend the PCI I/O space to 16MB > > Liviu Dudau (2): > Fix ioport_map() for !CONFIG_GENERIC_IOMAP cases. > arm64: Add architecture support for PCI > > Documentation/arm64/memory.txt | 16 +-- > arch/arm64/Kconfig | 19 +++- > arch/arm64/include/asm/Kbuild | 1 + > arch/arm64/include/asm/io.h | 5 +- > arch/arm64/include/asm/pci.h | 51 +++++++++ > arch/arm64/kernel/Makefile | 1 + > arch/arm64/kernel/pci.c | 173 +++++++++++++++++++++++++++++++ > include/asm-generic/io.h | 2 +- > 8 files changed, 258 insertions(+), 10 deletions(-) > create mode 100644 arch/arm64/include/asm/pci.h > create mode 100644 arch/arm64/kernel/pci.c > > -- > 1.9.0 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
