[PATCH v6 00/30] Refine PCI scan interfaces and make generic pci host bridge
Yijing Wang
wangyijing at huawei.com
Sun Mar 8 19:33:57 PDT 2015
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-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()
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
Arnd Bergmann (1):
xen/PCI: Don't use deprecated function pci_scan_bus_parented()
Yijing Wang (29):
PCI: Rip out pci_bus_add_devices() from pci_scan_bus()
PCI: Rip out pci_bus_add_devices() from pci_scan_root_bus()
PCI: Export busn_resource to drivers/pci
PCI: Remove deprecated pci_scan_bus_parented()
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: Introduce pci_host_bridge_list to manage host bridges
PCI: Save sysdata in pci_host_bridge drvdata
PCI: Introduce pci_host_bridge_ops to support host specific
operations
PCI: Introduce new scan function pci_scan_host_bridge()
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: Rename pcibios_root_bridge_prepare()
powerpc/pci: Use pci_scan_host_bridge() for simplicity
PCI: Remove weak pcibios_root_bridge_prepare()
sparc/PCI: Claim bus resources before pci_bus_add_devices()
sparc/PCI: Use pci_scan_host_bridge() for simplicity
PCI: Introduce pci_bus_child_max_busnr()
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: Export find_pci_host_bridge() and rename to
pci_find_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 | 14 ++-
arch/alpha/kernel/sys_nautilus.c | 6 +-
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 | 7 +-
arch/m68k/coldfire/pci.c | 1 +
arch/microblaze/pci/pci-common.c | 19 +--
arch/mips/include/asm/pci.h | 2 -
arch/mips/pci/pci.c | 5 +-
arch/mn10300/unit-asb2305/pci.c | 7 +-
arch/powerpc/include/asm/machdep.h | 2 +-
arch/powerpc/kernel/pci-common.c | 77 ++++++------
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 | 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 | 51 ++++-----
arch/sparc/kernel/pcic.c | 3 +
arch/tile/include/asm/pci.h | 2 -
arch/tile/kernel/pci.c | 7 +-
arch/tile/kernel/pci_gx.c | 7 +-
arch/unicore32/kernel/pci.c | 11 +--
arch/x86/include/asm/pci.h | 6 -
arch/x86/pci/acpi.c | 37 +++---
arch/x86/pci/common.c | 4 +-
arch/xtensa/kernel/pci.c | 11 ++-
drivers/parisc/dino.c | 8 +-
drivers/parisc/lba_pci.c | 7 +-
drivers/pci/host-bridge.c | 93 ++++++++++++++-
drivers/pci/host/pci-mvebu.c | 18 +---
drivers/pci/host/pci-tegra.c | 16 ---
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 | 8 +-
drivers/pci/pci.c | 50 +++++++-
drivers/pci/pci.h | 9 ++
drivers/pci/probe.c | 196 ++++++++++++------------------
drivers/pci/xen-pcifront.c | 13 ++-
include/linux/pci.h | 42 ++++---
include/uapi/linux/pci.h | 3 +
46 files changed, 458 insertions(+), 397 deletions(-)
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