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PCI/IOV: Add pci_vf_drivers_autoprobe() interface

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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: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: Juan J. Alvarez <jjalvare@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Bryant G. Ly 2017-11-09 08:00:35 -06:00 committed by Michael Ellerman
parent dae7253f9f
commit 608c0d8804
3 changed files with 15 additions and 0 deletions
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2
arch/powerpc/platforms/pseries/pci.c
View file

@ -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

11
drivers/pci/iov.c
View file

@ -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

2
include/linux/pci.h
View file

@ -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)