diff options
Diffstat (limited to 'arch/arm64/kernel/pci.c')
| -rw-r--r-- | arch/arm64/kernel/pci.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 570988c7a7ff..95c06f634f49 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -13,11 +13,14 @@ #include <linux/mm.h> #include <linux/of_pci.h> #include <linux/of_platform.h> +#include <linux/of_irq.h> #include <linux/pci.h> #include <linux/pci-acpi.h> #include <linux/pci-ecam.h> #include <linux/slab.h> +#include "../../../drivers/pci/pcie/portdrv.h" + #ifdef CONFIG_ACPI /* * Try to assign the IRQ number when probing a new device @@ -32,6 +35,47 @@ int pcibios_alloc_irq(struct pci_dev *dev) #endif /* + * Check device tree if the service interrupts are there + */ +int pcibios_check_service_irqs(struct pci_dev *dev, int *irqs, int mask) +{ + int ret, count = 0; + struct device_node *np = NULL; + + if (dev->bus->dev.of_node) + np = dev->bus->dev.of_node; + + if (np == NULL) + return 0; + + if (!IS_ENABLED(CONFIG_OF_IRQ)) + return 0; + + /* If root port doesn't support MSI/MSI-X/INTx in RC mode, + * request irq for aer + */ + if (mask & PCIE_PORT_SERVICE_AER) { + ret = of_irq_get_byname(np, "aer"); + if (ret > 0) { + irqs[PCIE_PORT_SERVICE_AER_SHIFT] = ret; + count++; + } + } + + if (mask & PCIE_PORT_SERVICE_PME) { + ret = of_irq_get_byname(np, "pme"); + if (ret > 0) { + irqs[PCIE_PORT_SERVICE_PME_SHIFT] = ret; + count++; + } + } + + /* TODO: add more service interrupts if there it is in the device tree*/ + + return count; +} + +/* * raw_pci_read/write - Platform-specific PCI config space access. */ int raw_pci_read(unsigned int domain, unsigned int bus, |