On Tue, Apr 22, 2014 at 09:58:28AM +0100, Sandeepa Prabhu wrote: > 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? Yes, I have pushed them into git://linux-arm.org/linux-ld.git Best regards, Liviu > > 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 > -- ==================== | I would like to | | fix the world, | | but they're not | | giving me the | \ source code! / --------------- ¯\_(ツ)_/¯ -- 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
