From be2021baeed64d8947a56529fc383308918ecc41 Mon Sep 17 00:00:00 2001 From: Tomasz Nowicki Date: Mon, 12 Sep 2016 20:32:22 +0200 Subject: [PATCH] PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table It is possible to provide information about which MSI controller to use on a per-device basis for DT. This patch supply this with ACPI support. Currently, IORT is the only one ACPI table which can provide such mapping. In order to plug IORT into MSI infrastructure we are adding ACPI equivalents for finding PCI device domain and its RID translation (pci_msi_domain_get_msi_rid and pci_msi_domain_get_msi_rid calls). Signed-off-by: Tomasz Nowicki Reviewed-by: Hanjun Guo Acked-by: Marc Zyngier Acked-by: Bjorn Helgaas Signed-off-by: Marc Zyngier --- drivers/pci/msi.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 98f12223c734..137b4c5fb638 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -1502,8 +1503,8 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); of_node = irq_domain_get_of_node(domain); - if (of_node) - rid = of_msi_map_rid(&pdev->dev, of_node, rid); + rid = of_node ? of_msi_map_rid(&pdev->dev, of_node, rid) : + iort_msi_map_rid(&pdev->dev, rid); return rid; } @@ -1519,9 +1520,13 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) */ struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev) { + struct irq_domain *dom; u32 rid = 0; pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); - return of_msi_map_get_device_domain(&pdev->dev, rid); + dom = of_msi_map_get_device_domain(&pdev->dev, rid); + if (!dom) + dom = iort_get_device_domain(&pdev->dev, rid); + return dom; } #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */