diff options
Diffstat (limited to 'drivers/pci/probe.c')
-rw-r--r-- | drivers/pci/probe.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index cefd636681b6..c03ecbffc50b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -661,6 +661,32 @@ static void pci_set_bus_speed(struct pci_bus *bus) } } +static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) +{ + /* + * Any firmware interface that can resolve the msi_domain + * should be called from here. + */ + + return NULL; +} + +static void pci_set_bus_msi_domain(struct pci_bus *bus) +{ + struct irq_domain *d; + + /* + * Either bus is the root, and we must obtain it from the + * firmware, or we inherit it from the bridge device. + */ + if (pci_is_root_bus(bus)) + d = pci_host_bridge_msi_domain(bus); + else + d = dev_get_msi_domain(&bus->self->dev); + + dev_set_msi_domain(&bus->dev, d); +} + static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, struct pci_dev *bridge, int busnr) { @@ -714,6 +740,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, bridge->subordinate = child; add_dev: + pci_set_bus_msi_domain(child); ret = device_register(&child->dev); WARN_ON(ret < 0); @@ -1544,6 +1571,17 @@ static void pci_init_capabilities(struct pci_dev *dev) pci_enable_acs(dev); } +static void pci_set_msi_domain(struct pci_dev *dev) +{ + /* + * If no domain has been set through the pcibios_add_device + * callback, inherit the default from the bus device. + */ + if (!dev_get_msi_domain(&dev->dev)) + dev_set_msi_domain(&dev->dev, + dev_get_msi_domain(&dev->bus->dev)); +} + void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { int ret; @@ -1585,6 +1623,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) ret = pcibios_add_device(dev); WARN_ON(ret < 0); + /* Setup MSI irq domain */ + pci_set_msi_domain(dev); + /* Notifier could use PCI capabilities */ dev->match_driver = false; ret = device_add(&dev->dev); @@ -1975,6 +2016,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, b->bridge = get_device(&bridge->dev); device_enable_async_suspend(b->bridge); pci_set_bus_of_node(b); + pci_set_bus_msi_domain(b); if (!parent) set_dev_node(b->bridge, pcibus_to_node(b)); |