[PATCH v9 00/30] Refine PCI scan interfaces and make generic pci host bridge

Yijing Wang
2015-04-03T09:31:01Z

v8->v9:
Add Thierry's Acked-by and Tested-by.
Fix the building error for powerpc found by Daniel.
Change pci_host_assign_domain_nr() to static.
v7->v8:
Fix some cross building errors found by kbuild test.
Drop the rename patch for find_pci_host_bridge().
v6->v7:
Drop previous patch which combined the domain and bus in one argument.
Make the pci_host_bridge hold the default busn resource, so we could
check whether new host busn resource is conflict with existing ones.
Move pci_host_assign_domain_nr() to drivers/pci/host-bridge.c
Other changes suggested by Bjorn and Suravee.
v5->v6:
Fix cross building errors found by kbuild test.
Export busn_resource to Xen pcifront driver.
v4->v5:
Fix some code style issues and rename some functions suggested by Bjorn.
Fix some code flaw(Eg. call pci_bus_add_devices() before resources claim
or lack the return checking).
v3->v4:
Fix the rebase issue.
v2->v3:
Rebase this series on v4.0-rc1.
v1->v2:
Split pci_host_bridge_list into a new patch, remove .phb_probe_mode
and rework powerpc .phb_of_scan_bus() for simpilicty suggested by
Arnd. Refresh some patch description log, and add a new patch to fix
build warning in ia64.

This series is based on Bjorn's pci/enumeration branch.
You could pull it from https://github.com/YijingWang/linux-pci.git enumer9

Now in kernel, we scan pci bus use the following ways:
1. pci_scan_bus.
parent = NULL, default io/mem/bus resources
call pci_bus_add_devices()

2. pci_scan_bus_parented() + pci_bus_add_devices()
default io/mem/bus resources, only used by xen

3. pci_scan_root_bus() + pci_bus_add_devices()

4. pci_create_root_bus() + pci_scan_child_bus() + pci_bus_add_devices()

5. pci_create_root_bus() + xx_of_scan_bus() + pci_bus_add_devices()

And we have a lot of arch specific pci_domain_nr() and other platform
specific weak function like pcibios_root_bridge_prepare().

After applied this series, we have following scan interfaces:

1. pci_scan_bus()
parent = NULL, default io/mem/bus resources.
for legacy pci scan

2. pci_scan_root_bus()
for callers provide its own parent and io/mem/bus resources
but no platform specific pci_host_bridge operations

3. pci_scan_host_bridge()
for callers provide its own parent and io/mem/bus resources

Arnd Bergmann (1):
xen/PCI: Don't use deprecated function pci_scan_bus_parented()

Yijing Wang (29):
PCI: Remove deprecated pci_scan_bus_parented()
PCI: Save domain in pci_host_bridge
PCI: Move pci_bus_assign_domain_nr() declaration into
drivers/pci/pci.h
PCI: Introduce pci_host_assign_domain_nr() to assign domain
PCI: Separate pci_host_bridge creation out of pci_create_root_bus()
PCI: Add default bus resource in pci_host_bridge
PCI: Update pci_host_bridge bus resource
PCI: Introduce pci_host_first_busnr() function
PCI: Introduce pci_host_bridge_list to manage host bridges
PCI: Save sysdata in pci_host_bridge drvdata
powerpc/PCI: Rename pcibios_root_bridge_prepare() to
pcibios_set_root_bus_speed()
PCI: Move pcibios_root_bridge_prepare() to pci_create_host_bridge()
PCI: Introduce pci_host_bridge_ops to support host specific
operations
PCI: Introduce new scan function pci_scan_host_bridge()
PCI: Introduce pci_bus_child_max_busnr()
x86/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge
ia64/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge
powerpc/pci: Use pci_scan_host_bridge() for simplicity
PCI: Remove pcibios_root_bridge_prepare() and
pcibos_set_root_bus_speed()
sparc/PCI: Use pci_scan_host_bridge() for simplicity
parisc/PCI: Use pci_scan_root_bus() for simplicity
PCI/mvebu: Use pci_common_init_dev() to simplify code
PCI/tegra: Remove redundant tegra_pcie_scan_bus()
PCI/designware: Use pci_scan_root_bus() for simplicity
PCI/xgene: Use pci_scan_root_bus() instead of pci_create_root_bus()
PCI: Rename __pci_create_root_bus() to pci_create_root_bus()
PCI: Remove platform specific pci_domain_nr()
PCI: Remove pci_bus_assign_domain_nr()
PCI: Clean up CONFIG_PCI_DOMAINS_GENERIC

arch/alpha/include/asm/pci.h | 2 -
arch/alpha/kernel/pci.c | 4 +-
arch/alpha/kernel/sys_nautilus.c | 2 +-
arch/arm/Kconfig | 3 -
arch/arm/kernel/bios32.c | 2 +-
arch/arm/mach-dove/pcie.c | 2 +-
arch/arm/mach-iop13xx/pci.c | 4 +-
arch/arm/mach-mv78xx0/pcie.c | 2 +-
arch/arm/mach-orion5x/pci.c | 4 +-
arch/arm64/Kconfig | 3 -
arch/frv/mb93090-mb00/pci-vdk.c | 3 +-
arch/ia64/include/asm/pci.h | 1 -
arch/ia64/pci/pci.c | 34 +++--
arch/ia64/sn/kernel/io_init.c | 4 +-
arch/m68k/coldfire/pci.c | 2 +-
arch/microblaze/pci/pci-common.c | 15 +--
arch/mips/include/asm/pci.h | 2 -
arch/mips/pci/pci.c | 4 +-
arch/mn10300/unit-asb2305/pci.c | 3 +-
arch/powerpc/include/asm/machdep.h | 2 +-
arch/powerpc/kernel/pci-common.c | 79 ++++++------
arch/powerpc/platforms/pseries/pci.c | 8 +-
arch/powerpc/platforms/pseries/pseries.h | 2 +-
arch/powerpc/platforms/pseries/setup.c | 2 +-
arch/s390/pci/pci.c | 10 +-
arch/sh/drivers/pci/pci.c | 4 +-
arch/sh/include/asm/pci.h | 2 -
arch/sparc/kernel/leon_pci.c | 2 +-
arch/sparc/kernel/pci.c | 45 +++----
arch/sparc/kernel/pcic.c | 2 +-
arch/tile/include/asm/pci.h | 2 -
arch/tile/kernel/pci.c | 4 +-
arch/tile/kernel/pci_gx.c | 4 +-
arch/unicore32/kernel/pci.c | 2 +-
arch/x86/include/asm/pci.h | 6 -
arch/x86/pci/acpi.c | 37 +++---
arch/x86/pci/common.c | 2 +-
arch/xtensa/kernel/pci.c | 2 +-
drivers/parisc/dino.c | 6 +-
drivers/parisc/lba_pci.c | 4 +-
drivers/pci/host-bridge.c | 202 ++++++++++++++++++++++++++++
drivers/pci/host/pci-mvebu.c | 18 +---
drivers/pci/host/pci-tegra.c | 16 ---
drivers/pci/host/pci-versatile.c | 3 +-
drivers/pci/host/pci-xgene.c | 3 +-
drivers/pci/host/pcie-designware.c | 4 +-
drivers/pci/host/pcie-xilinx.c | 2 +-
drivers/pci/hotplug/acpiphp_glue.c | 29 +----
drivers/pci/hotplug/ibmphp_core.c | 2 +-
drivers/pci/pci.c | 85 ++++---------
drivers/pci/pci.h | 15 ++
drivers/pci/probe.c | 212 ++++++++++++------------------
drivers/pci/xen-pcifront.c | 16 ++-
include/linux/pci.h | 46 +++----
54 files changed, 517 insertions(+), 459 deletions(-)