smmu_device_add

Synopsis:

#include <smmu.h>

int smmu_device_add_pci(struct smmu_object *const sop,
                               unsigned const pbus,
                               unsigned const pdev,
                               unsigned const pfunc);

Arguments:

sop: Pointer to the SMMU object to which the device will be attached, or NULL to remove the device from any SMMU objects owned by the current client.
pbus: The PCI device's bus number.
pdev: The PCI device's device number.
pfunc: The PCI device's function number.

For pbus, pdev, and pfunc, you can use the SMMU_PCI_FIELD_ANY constant for wildcarding.

CAUTION:

If you use wildcarding for all bus, device and function combinations, smmu_device_add_pci() checks the buses, devices, and functions on the entire system, which may take a long time.

To avoid this, use wildcarding for only one or two of bus, device, function.

Library:

libsmmu.a

Description:

The smmu_device_add_pci() function is a convenience function. It calls smmu_device_add_generic() to add a Peripheral Component Interconnect (PCI) device to a SMMU object.

To remove a PCI device from SMMU objects, call this function with the sop argument set to NULL.

Returns:

-1

Failure: errno is set.

EBUSY

Failure when attempting to add to a SMMU object a DMA device that is owned by another smmuman client.

ENOENT

Failure: when attempting to:

add a device – the smmuman service doesn't know which IOMMU/SMMU unit controls the device being added
remove a device – the smmuman client making the call doesn't own the SMMU object to which the device is attached

0

Success

+1

Success, but the client must call smmu_mapping_add() to reissue the memory mappings for this object (see “Preferred sequence for adding memory mappings and devices” for more information about why memory mappings may need to be reissued).