From the functionality point of view this series might be split into the
following logic parts: 1. Make MMCONFIG code arch-agnostic which allows all architectures to collect PCI config regions and used when necessary. 2. Move non-arch specific bits to the core code. 3. Use MMCONFIG code and implement generic ACPI based PCI host controller driver. 4. Enable above driver on ARM64
Patches has been built on top of 4.5-rc1 and can be found here: git@github.com:semihalf-nowicki-tomasz/linux.git (pci-acpi-v4)
NOTE, this patch set depends on Lorenzo's fixes: https://patchwork.ozlabs.org/patch/576450/ which can be found in pci-acpi-v4 branch.
This has been tested on Cavium ThunderX server, JunoR2, HP RX2660 IA64, x86, Hip05, X-Gene and QEMU-aarch64. Any help in reviewing and testing is very appreciated.
v3 -> v4 - dropped Jiang's fix http://lkml.iu.edu/hypermail/linux/kernel/1601.1/04318.html - added Lorenzo's fix patch 19/24 - ACPI PCI bus domain number assigning cleanup - changed resource management, we now claim and reassign resources - improvements for applying quirks - dropped Matthew's http://www.spinics.net/lists/linux-pci/msg45950.html dependency - rebased to 4.5-rc1
v2 -> v3 - fix legacy IRQ assigning and IO ports registration - remove reference to arch specific companion device for ia64 - move ACPI PCI host controller driver to pci_root.c - drop generic domain assignment for x86 and ia64 as I am not able to run all necessary test variants - drop patch which cleaned legacy IRQ assignment since it belongs to Mathew's series: https://patchwork.ozlabs.org/patch/557504/ - extend MCFG quirk code - rebased to 4.4
v1 -> v2 - moved non-arch specific piece of code to dirver/acpi/ directory - fixed IO resource handling - introduced PCI config accessors quirks matching - moved ACPI_COMPANION_SET to generic code
v1 - https://lkml.org/lkml/2015/10/27/504 v2 - https://lkml.org/lkml/2015/12/16/246 v3 - http://lkml.iu.edu/hypermail/linux/kernel/1601.1/04308.html
Lorenzo Pieralisi (1): drivers: pci: add generic code to claim bus resources
Tomasz Nowicki (22): x86, pci: Reorder logic of pci_mmconfig_insert() function x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory pci, acpi, mcfg: Provide generic implementation of MCFG code initialization. x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication. x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver. XEN / PCI: Remove the dependence on arch x86 when PCI_MMCONFIG=y pci, acpi, mcfg: Provide default RAW ACPI PCI config space accessors. arm64, acpi: Use MCFG and empty PCI config space accessors from mcfg.c file. pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not. x86, pci: Cleanup platform specific MCFG data by using ECAM hot_added flag. pci, acpi: Move ACPI host bridge device companion assignment to core code. x86, ia64, pci: Remove ACPI companion device from platform specific data. pci, acpi: Provide generic way to assign bus domain number. x86, ia64: Include acpi_pci_{add|remove}_bus to the default pcibios_{add|remove}_bus implementation. acpi, mcfg: Implement two calls that might be used to inject/remove MCFG region. x86, acpi, pci: Use equivalent function from mcfg.c driver. acpi, mcfg: Add default PCI config accessors implementation and initial support for related quirks. pci, of: Move the PCI I/O space management to PCI core code. pci, acpi: Support for ACPI based generic PCI host controller init pci, acpi: Match PCI config space accessors against platfrom specific quirks. arm64, pci, acpi: Assign legacy IRQs once device is enable. arm64, pci, acpi: Start using ACPI based PCI host bridge driver for ARM64.
arch/arm64/Kconfig | 8 ++ arch/arm64/kernel/pci.c | 37 ++---- arch/ia64/hp/common/sba_iommu.c | 2 +- arch/ia64/include/asm/pci.h | 1 - arch/ia64/pci/pci.c | 26 ---- arch/ia64/sn/kernel/io_acpi_init.c | 4 +- arch/x86/Kconfig | 4 + arch/x86/include/asm/pci.h | 3 - arch/x86/include/asm/pci_x86.h | 28 +---- arch/x86/pci/acpi.c | 56 ++------- arch/x86/pci/common.c | 10 -- arch/x86/pci/mmconfig-shared.c | 250 ++++++------------------------------- arch/x86/pci/mmconfig_32.c | 11 +- arch/x86/pci/mmconfig_64.c | 67 +--------- arch/x86/pci/numachip.c | 1 + drivers/acpi/Kconfig | 7 ++ drivers/acpi/Makefile | 1 + drivers/acpi/mcfg.c | 201 +++++++++++++++++++++++++++++ drivers/acpi/pci_root.c | 134 +++++++++++++++++++- drivers/of/address.c | 116 +---------------- drivers/pci/Kconfig | 10 ++ drivers/pci/Makefile | 5 + drivers/pci/ecam.c | 234 ++++++++++++++++++++++++++++++++++ drivers/pci/pci.c | 126 ++++++++++++++++++- drivers/pci/probe.c | 5 + drivers/pci/setup-bus.c | 63 ++++++++++ drivers/xen/pci.c | 7 +- include/acpi/acpi_bus.h | 1 + include/asm-generic/vmlinux.lds.h | 7 ++ include/linux/acpi.h | 2 + include/linux/ecam.h | 62 +++++++++ include/linux/of_address.h | 9 -- include/linux/pci-acpi.h | 19 +++ include/linux/pci.h | 6 + 34 files changed, 962 insertions(+), 561 deletions(-) create mode 100644 drivers/acpi/mcfg.c create mode 100644 drivers/pci/ecam.c create mode 100644 include/linux/ecam.h