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33 .Nd inform a PF driver that a VF is being created
41 .Fn PCI_ADD_VF "device_t dev" "uint16_t vfnum" "const nvlist_t *vf_config"
45 method is called by the PCI Single-Root I/O Virtualization
47 infrastructure when it is initializating a new Virtual Function (VF) as a child
48 of the given Physical Function (PF) device.
49 This method will not be called until a successful call to
52 It is not guaranteed that this method will be called following a successful call
55 If the infrastructure encounters a failure to allocate resources following the
58 the VF creation will be aborted and
60 will be called immediately without any preceding calls to
63 The index of the VF being initialized is passed in the
66 VFs are always numbered sequentially starting at 0.
68 If the driver requested device-specific configuration parameters via a VF schema
70 .Xr pci_iov_attach 9 ,
71 those parameters will be contained in the
74 All configuration parameters that were either set as required parameters or that
75 had a default value set in the VF schema are guaranteed to be present in
77 Configuration parameters that were neither set as required nor were given a
78 default value are optional and may or may not be present in
81 will not contain any configuration parameters that were not specified in the VF
83 All configuration parameters will have the correct type and will be in the range
84 of valid values specified in the schema.
86 Note that it is possible for the user to set different configuration values on
87 different VF devices that are children of the same PF.
88 The PF driver must not cache configuration parameters passed in previous calls
91 for other VFs and apply those parameters to the current VF.
93 This function will not be called twice for the same
95 on the same PF device without
99 first being called, in that order.
101 This method returns 0 on success, otherwise an appropriate error is returned.
102 If this method returns an error then the current VF device will be destroyed
103 but the rest of the VF devices will be created and SR-IOV will be enabled on
108 .Xr pci_iov_schema 9 ,
112 This manual page was written by
113 .An Ryan Stone Aq Mt rstone@FreeBSD.org .