diff options
Diffstat (limited to 'arch/arm64/kernel/pci.c')
| -rw-r--r-- | arch/arm64/kernel/pci.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 409abc4..0568ec3 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -17,6 +17,8 @@ #include <linux/mm.h> #include <linux/of_pci.h> #include <linux/of_platform.h> +#include <linux/of_irq.h> +#include <linux/pcieport_if.h> #include <linux/pci.h> #include <linux/pci-acpi.h> #include <linux/pci-ecam.h> @@ -55,6 +57,66 @@ int pcibios_alloc_irq(struct pci_dev *dev) } /* + * 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; +} + +int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, int write_combine) +{ + if (mmap_state == pci_mmap_io) + return -EINVAL; + + /* + * Mark this as IO + */ + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot)) + return -EAGAIN; + + return 0; +} + +/* * raw_pci_read/write - Platform-specific PCI config space access. */ int raw_pci_read(unsigned int domain, unsigned int bus, |