Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
PCI_IOV_ADD_VF(9)      FreeBSD Kernel Developer's Manual     PCI_IOV_ADD_VF(9)

     PCI_IOV_ADD_VF -- inform a	PF driver that a VF is being created

     #include <sys/bus.h>
     #include <machine/stdarg.h>
     #include <sys/nv.h>
     #include <dev/pci/pci_iov.h>

     PCI_IOV_ADD_VF(device_t dev, uint16_t vfnum, const	nvlist_t *vf_config);

     The PCI_IOV_ADD_VF() method is called by the PCI Single-Root I/O Virtual-
     ization (SR-IOV) infrastructure when it is	initializating a new Virtual
     Function (VF) as a	child of the given Physical Function (PF) device.
     This method will not be called until a successful call to PCI_IOV_INIT(9)
     has been made.  It	is not guaranteed that this method will	be called fol-
     lowing a successful call to PCI_IOV_INIT(9).  If the infrastructure en-
     counters a	failure	to allocate resources following	the call to
     PCI_IOV_INIT(9), the VF creation will be aborted and PCI_IOV_UNINIT(9)
     will be called immediately	without	any preceding calls to PCI_IOV_ADD_VF.

     The index of the VF being initialized is passed in	the vfnum argument.
     VFs are always numbered sequentially starting at 0.

     If	the driver requested device-specific configuration parameters via a VF
     schema in its call	to pci_iov_attach(9), those parameters will be con-
     tained in the vf_config argument.	All configuration parameters that were
     either set	as required parameters or that had a default value set in the
     VF	schema are guaranteed to be present in vf_config.  Configuration pa-
     rameters that were	neither	set as required	nor were given a default value
     are optional and may or may not be	present	in vf_config.  vf_config will
     not contain any configuration parameters that were	not specified in the
     VF	schema.	 All configuration parameters will have	the correct type and
     will be in	the range of valid values specified in the schema.

     Note that it is possible for the user to set different configuration val-
     ues on different VF devices that are children of the same PF.  The	PF
     driver must not cache configuration parameters passed in previous calls
     to	PCI_IOV_ADD_VF() for other VFs and apply those parameters to the cur-
     rent VF.

     This function will	not be called twice for	the same vf_num	on the same PF
     device without PCI_IOV_UNINIT(9) and PCI_IOV_INIT(9) first	being called,
     in	that order.

     This method returns 0 on success, otherwise an appropriate	error is re-
     turned.  If this method returns an	error then the current VF device will
     be	destroyed but the rest of the VF devices will be created and SR-IOV
     will be enabled on	the PF.

     nv(9), pci(9), PCI_IOV_INIT(9), pci_iov_schema(9),	PCI_IOV_UNINIT(9)

     This manual page was written by Ryan Stone	<>.

FreeBSD	13.0			 May 28, 2015			  FreeBSD 13.0


Want to link to this manual page? Use this URL:

home | help