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  • Alex Chiang's avatar
    PCI: introduce pci_slot · f46753c5
    Alex Chiang authored
    
    
    Currently, /sys/bus/pci/slots/ only exposes hotplug attributes when a
    hotplug driver is loaded, but PCI slots have attributes such as address,
    speed, width, etc.  that are not related to hotplug at all.
    
    Introduce pci_slot as the primary data structure and kobject model.
    Hotplug attributes described in hotplug_slot become a secondary
    structure associated with the pci_slot.
    
    This patch only creates the infrastructure that allows the separation of
    PCI slot attributes and hotplug attributes.  In this patch, the PCI
    hotplug core remains the only user of this infrastructure, and thus,
    /sys/bus/pci/slots/ will still only become populated when a hotplug
    driver is loaded.
    
    A later patch in this series will add a second user of this new
    infrastructure and demonstrate splitting the task of exposing pci_slot
    attributes from hotplug_slot attributes.
    
      - Make pci_slot the primary sysfs entity. hotplug_slot becomes a
        subsidiary structure.
        o pci_create_slot() creates and registers a slot with the PCI core
        o pci_slot_add_hotplug() gives it hotplug capability
    
      - Change the prototype of pci_hp_register() to take the bus and
        slot number (on parent bus) as parameters.
    
      - Remove all the ->get_address methods since this functionality is
        now handled by pci_slot directly.
    
    [achiang@hp.com: rpaphp-correctly-pci_hp_register-for-empty-pci-slots]
    Tested-by: default avatarBadari Pulavarty <pbadari@us.ibm.com>
    Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    [akpm@linux-foundation.org: build fix]
    [akpm@linux-foundation.org: make headers_check happy]
    [akpm@linux-foundation.org: nuther build fix]
    [akpm@linux-foundation.org: fix typo in #include]
    Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
    Signed-off-by: default avatarMatthew Wilcox <matthew@wil.cx>
    Cc: Greg KH <greg@kroah.com>
    Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
    Cc: Len Brown <lenb@kernel.org>
    Acked-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    f46753c5