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Message-ID: <1424914187-21027-1-git-send-email-wangyijing@huawei.com>
Date: Thu, 26 Feb 2015 09:29:17 +0800
From: Yijing Wang <wangyijing@...wei.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
CC: Jiang Liu <jiang.liu@...ux.intel.com>, <linux-pci@...r.kernel.org>,
Yinghai Lu <yinghai@...nel.org>,
<linux-kernel@...r.kernel.org>,
Marc Zyngier <marc.zyngier@....com>,
<linux-arm-kernel@...ts.infradead.org>,
Russell King <linux@....linux.org.uk>, <x86@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Rusty Russell <rusty@...tcorp.com.au>,
Tony Luck <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
"David S. Miller" <davem@...emloft.net>,
"Guan Xuetao" <gxt@...c.pku.edu.cn>, <linux-alpha@...r.kernel.org>,
<linux-m68k@...ts.linux-m68k.org>, Liviu Dudau <liviu@...au.co.uk>,
"Arnd Bergmann" <arnd@...db.de>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
"Yijing Wang" <wangyijing@...wei.com>
Subject: [PATCH v3 00/30] Refine PCI scan interfaces and make generic pci host bridge
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_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 (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: 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: 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_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/IA64: Fix the build warning about pci_domain_nr()
PCI/powerpc: Rename pcibios_root_bridge_prepare()
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_acpi_init.c | 6 +-
arch/ia64/sn/kernel/io_init.c | 8 +-
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 | 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 | 50 ++++----
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 | 7 +-
drivers/pci/host-bridge.c | 90 ++++++++++++++-
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 | 6 +-
drivers/pci/pci.c | 42 ++++++-
drivers/pci/probe.c | 195 ++++++++++++------------------
drivers/pci/xen-pcifront.c | 11 ++-
include/linux/pci.h | 47 +++++---
include/uapi/linux/pci.h | 3 +
46 files changed, 423 insertions(+), 404 deletions(-)
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