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    SubjectRe: [PATCH 6/8 v4] PCI: support the SR-IOV capability
    On Tue, Oct 14, 2008 at 06:59:28PM +0800, Yu Zhao wrote:
    > +++ b/drivers/pci/pci.h
    > @@ -176,4 +176,59 @@ static inline int pci_ari_enabled(struct pci_dev *dev)
    > +struct pci_iov {
    > + int cap; /* capability position */
    > + int align; /* page size used to map memory space */
    > + int is_enabled; /* status of SR-IOV */
    > + int nentries; /* number of sysfs entries used by PF driver */
    > + u16 totalvfs; /* total VFs associated with the PF */
    > + u16 initialvfs; /* initial VFs associated with the PF */
    > + u16 numvfs; /* number of VFs available */
    > + u16 offset; /* first VF Routing ID offset */
    > + u16 stride; /* following VF stride */
    > + struct mutex mutex; /* lock for SR-IOV */
    > + struct kobject kobj; /* koject for IOV */
    > + struct pci_dev *dev; /* Physical Function */
    > + struct vf_entry *ve; /* Virtual Function related */
    > + int (*notify)(struct pci_dev *, u32); /* event callback function */
    > +};

    > +++ b/include/linux/pci.h
    > @@ -87,6 +87,12 @@ enum {
    > /* #6: expansion ROM */
    > PCI_ROM_RESOURCE,
    >
    > + /* device specific resources */
    > +#ifdef CONFIG_PCI_IOV
    > + PCI_IOV_RESOURCES,
    > + PCI_IOV_RESOURCES_END = PCI_IOV_RESOURCES + PCI_IOV_NUM_BAR - 1,
    > +#endif
    > +
    > /* address space assigned to buses behind the bridge */
    > #ifndef PCI_BRIDGE_RES_NUM
    > #define PCI_BRIDGE_RES_NUM 4

    Why expand the number of resources in struct pci_dev instead of putting
    the new resources in struct pci_iov?

    --
    Matthew Wilcox Intel Open Source Technology Centre
    "Bill, look, we understand that you're interested in selling us this
    operating system, but compare it to ours. We can't possibly take such
    a retrograde step."


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