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Message-ID: <54CB4A96.1080008@huawei.com> Date: Fri, 30 Jan 2015 17:10:46 +0800 From: Yijing Wang <wangyijing@...wei.com> To: Yijing Wang <wangyijing@...wei.com>, 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> Subject: Re: [PATCH v2 00/30] Refine PCI scan interfaces and make generic pci host bridge Hi Bjorn, Any comments for this series ? I'm so sorry to bother you. :) On 2015/1/21 8:29, Yijing Wang wrote: > 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 | 196 ++++++++++++------------------ > drivers/pci/xen-pcifront.c | 11 ++- > include/linux/pci.h | 47 +++++--- > include/uapi/linux/pci.h | 3 + > 46 files changed, 424 insertions(+), 404 deletions(-) > > > . > -- Thanks! Yijing -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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