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Commit 608c0d88 authored by Bryant G. Ly's avatar Bryant G. Ly Committed by Michael Ellerman
Browse files

PCI/IOV: Add pci_vf_drivers_autoprobe() interface 



Add a pci_vf_drivers_autoprobe() interface. Setting autoprobe to false
on the PF prevents drivers from binding to VFs when they are enabled.

Signed-off-by: default avatarBryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: default avatarJuan J. Alvarez <jjalvare@linux.vnet.ibm.com>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarRussell Currey <ruscur@russell.cc>
Reviewed-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent dae7253f

arch/powerpc/platforms/pseries/pci.c

+2 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) 
{

	/* Allocate PCI data */

	add_dev_pci_data(pdev);

	pci_vf_drivers_autoprobe(pdev, false);

	return 0;

}
@@ -70,6 +71,7 @@ int pseries_pcibios_sriov_disable(struct pci_dev *pdev) 
{

	/* Release PCI data */

	remove_dev_pci_data(pdev);

	pci_vf_drivers_autoprobe(pdev, true);

	return 0;

}

#endif

drivers/pci/iov.c

+11 −0
Original line number Diff line number Diff line
@@ -635,6 +635,17 @@ void pci_restore_iov_state(struct pci_dev *dev) 
		sriov_restore_state(dev);

}



/**

 * pci_vf_drivers_autoprobe - set PF property drivers_autoprobe for VFs

 * @dev: the PCI device

 * @auto_probe: set VF drivers auto probe flag

 */

void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool auto_probe)

{

	if (dev->is_physfn)

		dev->sriov->drivers_autoprobe = auto_probe;

}



/**

 * pci_iov_bus_range - find bus range used by Virtual Function

 * @bus: the PCI bus

include/linux/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -1961,6 +1961,7 @@ int pci_vfs_assigned(struct pci_dev *dev); 
int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);

int pci_sriov_get_totalvfs(struct pci_dev *dev);

resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);

void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);

#else

static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)

{
@@ -1988,6 +1989,7 @@ static inline int pci_sriov_get_totalvfs(struct pci_dev *dev) 
{ return 0; }

static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)

{ return 0; }

static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }

#endif



#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)