[PATCH 00/28] Refine PCI scan interfaces and make generic pci host bridge

Yijing Wang
2015-01-16T01:43:58Z

This series is based on Bjorn's pci-next branch.

Patch 1-4 ripped out pci_bus_add_devices() from pci scan interfaces
for better pci scan flow.

Patch 5-11 make a generic pci_host_bridge to hold pci_host_bridge
related informations, and introduce a pci_host_bridge_ops to
support platform host drivers provide its own pci_host_bridge
related operations to setup pci_host_bridge during pci enumeration.

Patch 12-28 apply the new pci scan interfaces to platform pci host
bridge drivers.

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_legacy()
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_root_bridge()
for callers provide its own parent and io/mem/bus resources
and pci_host_bridge_ops.

Besides, above pci scan interfaces all need addtionally call pci_bus_add_devices()
to set match_driver true and try to attach drivers.

Also we could eliminate all arch specific pci_domain_nr() after applied this series.

I tested this series on x86 (with or without ACPI).
Comments and tests are warmly welcome!

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

Yijing Wang (27):
PCI: Rip out pci_bus_add_devices() from pci_scan_bus()
PCI: Rip out pci_bus_add_devices() from pci_scan_root_bus()
PCI: Remove deprecated pci_scan_bus_parented()
PCI: Rename pci_scan_bus() to pci_scan_bus_legacy()
PCI: Combine PCI domain and bus number in u32 arg
PCI: Pass PCI domain number combined with root bus number
PCI: Introduce pci_host_assign_domain_nr() to assign domain
PCI: Separate pci_host_bridge creation out of pci_create_root_bus()
PCI: Save sysdata in pci_host_bridge drvdata
PCI: Introduce pci_host_bridge_ops to setup host bridge
PCI: Introduce new scan function pci_scan_root_bridge()
PCI/x86: Refine pci_acpi_scan_root() with generic pci_host_bridge
PCI/IA64: Refine pci_acpi_scan_root() with generic pci_host_bridge
PCI/powerpc: Rename pcibios_root_bridge_prepare() for better
readability
PCI/powerpc: Use pci_scan_root_bridge() for simplicity
PCI: Remove weak pcibios_root_bridge_prepare()
PCI/sparc: Use pci_scan_root_bridge() for simplicity
PCI: Introduce pci_bus_child_max_busnr()
PCI/Parisc: 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: Export find_pci_host_bridge()
PCI: Remove platform specific pci_domain_nr()
PCI: Remove pci_bus_assign_domain_nr()

arch/alpha/include/asm/pci.h | 2 -
arch/alpha/kernel/pci.c | 7 +-
arch/alpha/kernel/sys_nautilus.c | 4 +-
arch/frv/mb93090-mb00/pci-vdk.c | 6 +-
arch/ia64/include/asm/pci.h | 1 -
arch/ia64/pci/pci.c | 34 +++---
arch/ia64/sn/kernel/io_init.c | 6 +-
arch/m68k/coldfire/pci.c | 3 +-
arch/microblaze/pci/pci-common.c | 17 +--
arch/mips/include/asm/pci.h | 2 -
arch/mips/pci/pci.c | 5 +-
arch/mn10300/unit-asb2305/pci.c | 5 +-
arch/powerpc/include/asm/machdep.h | 2 +-
arch/powerpc/kernel/pci-common.c | 73 ++++++-----
arch/powerpc/platforms/pseries/pci.c | 2 +-
arch/powerpc/platforms/pseries/pseries.h | 2 +-
arch/powerpc/platforms/pseries/setup.c | 2 +-
arch/s390/pci/pci.c | 13 +--
arch/sh/drivers/pci/pci.c | 6 +-
arch/sh/include/asm/pci.h | 2 -
arch/sparc/kernel/leon_pci.c | 1 +
arch/sparc/kernel/pci.c | 48 ++++----
arch/sparc/kernel/pcic.c | 4 +-
arch/tile/include/asm/pci.h | 2 -
arch/tile/kernel/pci.c | 6 +-
arch/tile/kernel/pci_gx.c | 7 +-
arch/unicore32/kernel/pci.c | 13 +--
arch/x86/include/asm/pci.h | 6 -
arch/x86/pci/acpi.c | 38 +++---
arch/x86/pci/common.c | 4 +-
arch/xtensa/kernel/pci.c | 2 +
drivers/parisc/dino.c | 11 +--
drivers/parisc/lba_pci.c | 6 +-
drivers/pci/host-bridge.c | 90 +++++++++++++-
drivers/pci/host/pci-mvebu.c | 18 +---
drivers/pci/host/pci-tegra.c | 15 ---
drivers/pci/host/pci-xgene.c | 3 +-
drivers/pci/host/pcie-designware.c | 4 +-
drivers/pci/hotplug/acpiphp_glue.c | 29 +----
drivers/pci/hotplug/ibmphp_core.c | 6 +-
drivers/pci/pci.c | 40 ++++++-
drivers/pci/probe.c | 198 ++++++++++++------------------
drivers/pci/xen-pcifront.c | 11 ++-
include/linux/pci.h | 51 +++++---
include/uapi/linux/pci.h | 3 +
45 files changed, 425 insertions(+), 385 deletions(-)