Merge branch 'pci/msi' into next

}

EXPORT_SYMBOL_GPL(pci_msi_create_irq_domain);

/*

 * Users of the generic MSI infrastructure expect a device to have a single ID,

 * so with DMA aliases we have to pick the least-worst compromise. Devices with

 * DMA phantom functions tend to still emit MSIs from the real function number,

 * so we ignore those and only consider topological aliases where either the

 * alias device or RID appears on a different bus number. We also make the

 * reasonable assumption that bridges are walked in an upstream direction (so

 * the last one seen wins), and the much braver assumption that the most likely

 * case is that of PCI->PCIe so we should always use the alias RID. This echoes

 * the logic from intel_irq_remapping's set_msi_sid(), which presumably works

 * well enough in practice; in the face of the horrible PCIe<->PCI-X conditions

 * for taking ownership all we can really do is close our eyes and hope...

 */

static int get_msi_id_cb(struct pci_dev *pdev, u16 alias, void *data)

{

	u32 *pa = data;

	u8 bus = PCI_BUS_NUM(*pa);

	if (pdev->bus->number != bus || PCI_BUS_NUM(alias) != bus)

		*pa = alias;

	return 0;

}

/**

 * pci_msi_domain_get_msi_rid - Get the MSI requester id (RID)

 * @domain:	The interrupt domain

u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)

{

	struct device_node *of_node;

	u32 rid = 0;

	u32 rid = PCI_DEVID(pdev->bus->number, pdev->devfn);

	pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);

 * @pdev:	The PCI device

 *

 * Use the firmware data to find a device-specific MSI domain

 * (i.e. not one that is ste as a default).

 * (i.e. not one that is set as a default).

 *

 * Returns: The coresponding MSI domain or NULL if none has been found.

 * Returns: The corresponding MSI domain or NULL if none has been found.

 */

struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)

{

	struct irq_domain *dom;

	u32 rid = 0;

	u32 rid = PCI_DEVID(pdev->bus->number, pdev->devfn);

	pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);

	dom = of_msi_map_get_device_domain(&pdev->dev, rid);