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Date: Fri, 27 Nov 2009 23:36:45 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>, Jesse Barnes <jbarnes@...tuousgeek.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Alex Chiang <achiang@...com>, Bjorn Helgaas <bjorn.helgaas@...com> CC: Ingo Molnar <mingo@...e.hu>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>, Ivan Kokshaysky <ink@...assic.park.msu.ru> Subject: [PATCH 9/9] pci: pciehp second try to get big range for pcie devices -v2 handle the case the slot bridge that doesn't get pre-allocated big enough res from FW. for example pcie devices need 256M, but the bridge only get preallocated 2M... -v2: use resource_list_x Signed-off-by: Yinghai Lu <yinghai@...nel.org> --- drivers/pci/setup-bus.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 48 insertions(+), 1 deletion(-) Index: linux-2.6/drivers/pci/setup-bus.c =================================================================== --- linux-2.6.orig/drivers/pci/setup-bus.c +++ linux-2.6/drivers/pci/setup-bus.c @@ -985,13 +985,60 @@ void pci_assign_unassigned_bridge_resour { struct pci_bus *bus; struct pci_bus *parent = bridge->subordinate; + bool second_tried = false; + struct resource_list_x head, *list; int retval; + unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | + IORESOURCE_PREFETCH; + head.next = NULL; + +again: pci_bus_size_bridges(parent); pci_clear_master(bridge); - __pci_bridge_assign_resources(bridge, NULL); + __pci_bridge_assign_resources(bridge, &head); retval = pci_reenable_device(bridge); pci_set_master(bridge); pci_enable_bridges(parent); + + /* any device complain? */ + if (!head.next) + return; + + if (second_tried) { + /* still fail, don't need to try more */ + free_failed_list(&head); + return; + } + + second_tried = true; + printk(KERN_DEBUG "PCI: second try to assign unassigned res\n"); + + /* + * Try to release leaf bridge's resources that doesn't fit resource of + * child device under that bridge + */ + for (list = head.next; list;) { + unsigned long flags = list->flags; + + bus = list->dev->bus; + pci_bus_release_unused_bridge_res(bus, flags & type_mask, 0); + list = list->next; + } + /* retore size and flags */ + for (list = head.next; list;) { + struct resource *res = list->res; + + res->start = list->start; + res->end = list->end; + res->flags = list->flags; + if (list->dev->subordinate) + res->flags = 0; + + list = list->next; + } + free_failed_list(&head); + + goto again; } EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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