f3bb925153
Leaf drivers should not import the PCI bus interface to add IOV handling. Instead, move the IOV client methods to a separate kobj interface. Differential Revision: https://reviews.freebsd.org/D2584 Reviewed by: rstone
86 lines
3.2 KiB
Groff
86 lines
3.2 KiB
Groff
.\"
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.\" Copyright (c) 2014 Sandvine Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" SUCH DAMAGE.
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.\" $FreeBSD$
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.\"
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.Dd May 28, 2015
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.Dt PCI_IOV_INIT 9
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.Os
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.Sh NAME
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.Nm PCI_IOV_INIT
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.Nd enable SR-IOV on a PF device
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.Sh SYNOPSIS
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.In sys/bus.h
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.In machine/stdarg.h
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.In sys/nv.h
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.In dev/pci/pci_iov.h
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.Ft int
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.Fn PCI_IOV_INIT "device_t dev" "uint16_t num_vfs" "const nvlist_t *pf_config"
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.Sh DESCRIPTION
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The
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.Fn PCI_IOV_INIT
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method is called by the PCI Single-Root I/O Virtualization (SR-IOV)
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infrastucture when the user requests that SR-IOV be enabled on a Physical
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Function (PF).
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The number of Virtual Functions (VFs) that will be created is passed to this
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method in the
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.Fa num_vfs
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argument.
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.Pp
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If the driver requested device-specific PF configuration parameters via a PF
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schema in its call to
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.Xr pci_iov_attach 9 ,
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those parameters will be available in the
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.Fa pf_config
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argument.
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All configuration parameters that were either set as required parameters or that
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had a default value set in the PF schema are guaranteed to be present in
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.Fa pf_config .
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Configuration parameters that were neither set as required nor were given a
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default value are optional and may or may not be present in
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.Fa pf_config .
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.Fa pf_config
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will not contain any configuration parameters that were not specified in the PF
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schema.
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All configuration parameters will have the correct type and are in the range of
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valid values specified in the schema.
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.Pp
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If this method returns successfully, then this method will not be called again
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on the same device until after a call to
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.Xr PCI_IOV_UNINIT .
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.Sh RETURN VALUES
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Returns 0 on success, otherwise an appropriate error is returned.
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If this method returns an error then the SR-IOV configuration will be aborted
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and no VFs will be created.
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.Sh SEE ALSO
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.Xr nv 9 ,
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.Xr pci 9 ,
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.Xr pci_iov_schema 9 ,
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.Xr PCI_IOV_ADD_VF 9 ,
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.Xr PCI_IOV_UNINIT 9
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.Sh AUTHORS
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This manual page was written by
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.An Ryan Stone Aq Mt rstone@FreeBSD.org .
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