diff options
-rw-r--r-- | drivers/pci/probe.c | 68 | ||||
-rw-r--r-- | include/linux/pci.h | 3 |
2 files changed, 71 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 674a477a648..7662ab7b264 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1714,6 +1714,74 @@ err_out: return NULL; } +int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max) +{ + struct resource *res = &b->busn_res; + struct resource *parent_res, *conflict; + + res->start = bus; + res->end = bus_max; + res->flags = IORESOURCE_BUS; + + if (!pci_is_root_bus(b)) + parent_res = &b->parent->busn_res; + else { + parent_res = get_pci_domain_busn_res(pci_domain_nr(b)); + res->flags |= IORESOURCE_PCI_FIXED; + } + + conflict = insert_resource_conflict(parent_res, res); + + if (conflict) + dev_printk(KERN_DEBUG, &b->dev, + "busn_res: can not insert %pR under %s%pR (conflicts with %s %pR)\n", + res, pci_is_root_bus(b) ? "domain " : "", + parent_res, conflict->name, conflict); + else + dev_printk(KERN_DEBUG, &b->dev, + "busn_res: %pR is inserted under %s%pR\n", + res, pci_is_root_bus(b) ? "domain " : "", + parent_res); + + return conflict == NULL; +} + +int pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max) +{ + struct resource *res = &b->busn_res; + struct resource old_res = *res; + resource_size_t size; + int ret; + + if (res->start > bus_max) + return -EINVAL; + + size = bus_max - res->start + 1; + ret = adjust_resource(res, res->start, size); + dev_printk(KERN_DEBUG, &b->dev, + "busn_res: %pR end %s updated to %02x\n", + &old_res, ret ? "can not be" : "is", bus_max); + + if (!ret && !res->parent) + pci_bus_insert_busn_res(b, res->start, res->end); + + return ret; +} + +void pci_bus_release_busn_res(struct pci_bus *b) +{ + struct resource *res = &b->busn_res; + int ret; + + if (!res->flags || !res->parent) + return; + + ret = release_resource(res); + dev_printk(KERN_DEBUG, &b->dev, + "busn_res: %pR %s released\n", + res, ret ? "can not be" : "is"); +} + struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources) { diff --git a/include/linux/pci.h b/include/linux/pci.h index 6b10966cd1b..c4df570f3bb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -667,6 +667,9 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); struct pci_bus *pci_create_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); +int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); +int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); +void pci_bus_release_busn_res(struct pci_bus *b); struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); |