diff options
Diffstat (limited to 'drivers/pci/of.c')
| -rw-r--r-- | drivers/pci/of.c | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index e81835bdf4fa..c7136e259698 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -92,7 +92,6 @@ struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus) #endif } - static inline int __of_pci_pci_compare(struct device_node *node, unsigned int data) { @@ -598,3 +597,55 @@ int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin) } EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci); #endif /* CONFIG_OF_IRQ */ + +int pci_parse_request_of_pci_ranges(struct device *dev, + struct list_head *resources, + struct resource **bus_range) +{ + int err, res_valid = 0; + struct device_node *np = dev->of_node; + resource_size_t iobase; + struct resource_entry *win, *tmp; + + INIT_LIST_HEAD(resources); + err = of_pci_get_host_bridge_resources(np, 0, 0xff, resources, &iobase); + if (err) + return err; + + err = devm_request_pci_bus_resources(dev, resources); + if (err) + goto out_release_res; + + resource_list_for_each_entry_safe(win, tmp, resources) { + struct resource *res = win->res; + + switch (resource_type(res)) { + case IORESOURCE_IO: + err = pci_remap_iospace(res, iobase); + if (err) { + dev_warn(dev, "error %d: failed to map resource %pR\n", + err, res); + resource_list_destroy_entry(win); + } + break; + case IORESOURCE_MEM: + res_valid |= !(res->flags & IORESOURCE_PREFETCH); + break; + case IORESOURCE_BUS: + if (bus_range) + *bus_range = res; + break; + } + } + + if (res_valid) + return 0; + + dev_err(dev, "non-prefetchable memory resource required\n"); + err = -EINVAL; + + out_release_res: + pci_free_resource_list(resources); + return err; +} + |