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Add PCI_ID_OFW_IOMMU to the pci ecam ACPI driver

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Teach the pci host generic ACPI attachment about PCI_ID_OFW_IOMMU. This
will be used by the arm64 smmu IOMMU driver to read the xref and ID
this interface provides in a bus-agnostic way.

Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D39182
This commit is contained in:
Andrew Turner 2023-04-24 12:47:38 +01:00
parent 117beba8a8
commit 913d04deed
1 changed files with 29 additions and 2 deletions
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31
sys/dev/pci/pci_host_generic_acpi.c
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@ -412,6 +412,31 @@ generic_pcie_map_id(device_t pci, device_t child, uintptr_t *id)
return (0);
}
static int
generic_pcie_get_iommu(device_t pci, device_t child, uintptr_t *id)
{
struct generic_pcie_acpi_softc *sc;
struct pci_id_ofw_iommu *iommu;
u_int iommu_sid, iommu_xref;
uintptr_t rid;
int err;
iommu = (struct pci_id_ofw_iommu *)id;
sc = device_get_softc(pci);
err = pcib_get_id(pci, child, PCI_ID_RID, &rid);
if (err != 0)
return (err);
err = acpi_iort_map_pci_smmuv3(sc->base.ecam, rid, &iommu_xref,
&iommu_sid);
if (err == 0) {
iommu->id = iommu_sid;
iommu->xref = iommu_xref;
}
return (err);
}
static int
generic_pcie_acpi_alloc_msi(device_t pci, device_t child, int count,
int maxcount, int *irqs)
@ -479,11 +504,13 @@ static int
generic_pcie_acpi_get_id(device_t pci, device_t child, enum pci_id_type type,
uintptr_t *id)
{
if (type == PCI_ID_OFW_IOMMU)
return (generic_pcie_get_iommu(pci, child, id));
if (type == PCI_ID_MSI)
return (generic_pcie_map_id(pci, child, id));
else
return (pcib_get_id(pci, child, type, id));
return (pcib_get_id(pci, child, type, id));
}
static device_method_t generic_pcie_acpi_methods[] = {