diff options
Diffstat (limited to 'drivers/pci/hotplug/acpiphp_glue.c')
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 111 |
1 files changed, 84 insertions, 27 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index d370f999782e..faf7eed5d963 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -116,6 +116,59 @@ is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv) } } +/* callback routine to check for the existance of a pci dock device */ +static acpi_status +is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv) +{ + int *count = (int *)context; + + if (is_dock_device(handle)) { + (*count)++; + return AE_CTRL_TERMINATE; + } else { + return AE_OK; + } +} + + + + +/* + * the _DCK method can do funny things... and sometimes not + * hah-hah funny. + * + * TBD - figure out a way to only call fixups for + * systems that require them. + */ +static int post_dock_fixups(struct notifier_block *nb, unsigned long val, + void *v) +{ + struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb); + struct pci_bus *bus = func->slot->bridge->pci_bus; + u32 buses; + + if (!bus->self) + return NOTIFY_OK; + + /* fixup bad _DCK function that rewrites + * secondary bridge on slot + */ + pci_read_config_dword(bus->self, + PCI_PRIMARY_BUS, + &buses); + + if (((buses >> 8) & 0xff) != bus->secondary) { + buses = (buses & 0xff000000) + | ((unsigned int)(bus->primary) << 0) + | ((unsigned int)(bus->secondary) << 8) + | ((unsigned int)(bus->subordinate) << 16); + pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); + } + return NOTIFY_OK; +} + + + /* callback routine to register each ACPI PCI slot object */ static acpi_status @@ -124,7 +177,6 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; struct acpiphp_slot *slot; struct acpiphp_func *newfunc; - struct dependent_device *dd; acpi_handle tmp; acpi_status status = AE_OK; unsigned long adr, sun; @@ -137,7 +189,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) status = acpi_get_handle(handle, "_EJ0", &tmp); - if (ACPI_FAILURE(status) && !(is_dependent_device(handle))) + if (ACPI_FAILURE(status) && !(is_dock_device(handle))) return AE_OK; device = (adr >> 16) & 0xffff; @@ -162,18 +214,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) newfunc->flags |= FUNC_HAS_PS3; - if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) { + if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) newfunc->flags |= FUNC_HAS_DCK; - /* add to devices dependent on dock station, - * because this may actually be the dock bridge - */ - dd = alloc_dependent_device(handle); - if (!dd) - err("Can't allocate memory for " - "new dependent device!\n"); - else - add_dependent_device(dd); - } status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); if (ACPI_FAILURE(status)) @@ -225,20 +267,23 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); } - /* if this is a device dependent on a dock station, - * associate the acpiphp_func to the dependent_device - * struct. - */ - if ((dd = get_dependent_device(handle))) { - newfunc->flags |= FUNC_IS_DD; - /* - * we don't want any devices which is dependent - * on the dock to have it's _EJ0 method executed. - * because we need to run _DCK first. + if (is_dock_device(handle)) { + /* we don't want to call this device's _EJ0 + * because we want the dock notify handler + * to call it after it calls _DCK */ newfunc->flags &= ~FUNC_HAS_EJ0; - dd->func = newfunc; - add_pci_dependent_device(dd); + if (register_hotplug_dock_device(handle, + handle_hotplug_event_func, newfunc)) + dbg("failed to register dock device\n"); + + /* we need to be notified when dock events happen + * outside of the hotplug operation, since we may + * need to do fixups before we can hotplug. + */ + newfunc->nb.notifier_call = post_dock_fixups; + if (register_dock_notifier(&newfunc->nb)) + dbg("failed to register a dock notifier"); } /* install notify handler */ @@ -277,6 +322,15 @@ static int detect_ejectable_slots(acpi_handle *bridge_handle) status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, is_ejectable_slot, (void *)&count, NULL); + /* + * we also need to add this bridge if there is a dock bridge or + * other pci device on a dock station (removable) + */ + if (!count) + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, + (u32)1, is_pci_dock_device, (void *)&count, + NULL); + return count; } @@ -487,8 +541,7 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) goto out; /* check if this bridge has ejectable slots */ - if ((detect_ejectable_slots(handle) > 0) || - (detect_dependent_devices(handle) > 0)) { + if ((detect_ejectable_slots(handle) > 0)) { dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); add_p2p_bridge(handle, dev); } @@ -605,6 +658,10 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge) list_for_each_safe (list, tmp, &slot->funcs) { struct acpiphp_func *func; func = list_entry(list, struct acpiphp_func, sibling); + if (is_dock_device(func->handle)) { + unregister_hotplug_dock_device(func->handle); + unregister_dock_notifier(&func->nb); + } if (!(func->flags & FUNC_HAS_DCK)) { status = acpi_remove_notify_handler(func->handle, ACPI_SYSTEM_NOTIFY, |