diff options
Diffstat (limited to 'drivers/pci/msi/irqdomain.c')
| -rw-r--r-- | drivers/pci/msi/irqdomain.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c index 765312c92d9b..0938ef7ebabf 100644 --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -429,6 +429,26 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) } /** + * pci_msi_map_rid_ctlr_node - Get the MSI controller node and MSI requester id (RID) + * @pdev: The PCI device + * @node: Pointer to store the MSI controller device node + * + * Use the firmware data to find the MSI controller node for @pdev. + * If found map the RID and initialize @node with it. @node value must + * be set to NULL on entry. + * + * Returns: The RID. + */ +u32 pci_msi_map_rid_ctlr_node(struct pci_dev *pdev, struct device_node **node) +{ + u32 rid = pci_dev_id(pdev); + + pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); + + return of_msi_xlate(&pdev->dev, node, rid); +} + +/** * pci_msi_get_device_domain - Get the MSI domain for a given PCI device * @pdev: The PCI device * |