diff options
Diffstat (limited to 'drivers/pci/hotplug')
| -rw-r--r-- | drivers/pci/hotplug/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 1 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp.h | 1 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 12 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 31 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pcihp_slot.c | 5 | ||||
| -rw-r--r-- | drivers/pci/hotplug/s390_pci_hpc.c | 63 |
7 files changed, 49 insertions, 66 deletions
diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig index d85009de713..0a648af8953 100644 --- a/drivers/pci/hotplug/Kconfig +++ b/drivers/pci/hotplug/Kconfig @@ -146,7 +146,7 @@ config HOTPLUG_PCI_SGI When in doubt, say N. config HOTPLUG_PCI_S390 - tristate "System z PCI Hotplug Support" + bool "System z PCI Hotplug Support" depends on S390 && 64BIT help Say Y here if you want to use the System z PCI Hotplug diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 9d6e535e74a..0b7d23b4ad9 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -581,7 +581,6 @@ static void __ref enable_slot(struct acpiphp_slot *slot) acpiphp_sanitize_bus(bus); acpiphp_set_hpp_values(bus); acpiphp_set_acpi_region(slot); - pci_enable_bridges(bus); list_for_each_entry(dev, &bus->devices, bus_list) { /* Assume that newly added devices are powered on already. */ diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index 7fb326983ed..541bbe6d534 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -155,6 +155,7 @@ void pciehp_green_led_off(struct slot *slot); void pciehp_green_led_blink(struct slot *slot); int pciehp_check_link_status(struct controller *ctrl); void pciehp_release_ctrl(struct controller *ctrl); +int pciehp_reset_slot(struct slot *slot, int probe); static inline const char *slot_name(struct slot *slot) { diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 7d72c5e2eba..f4a18f51a29 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -69,6 +69,7 @@ static int get_power_status (struct hotplug_slot *slot, u8 *value); static int get_attention_status (struct hotplug_slot *slot, u8 *value); static int get_latch_status (struct hotplug_slot *slot, u8 *value); static int get_adapter_status (struct hotplug_slot *slot, u8 *value); +static int reset_slot (struct hotplug_slot *slot, int probe); /** * release_slot - free up the memory used by a slot @@ -111,6 +112,7 @@ static int init_slot(struct controller *ctrl) ops->disable_slot = disable_slot; ops->get_power_status = get_power_status; ops->get_adapter_status = get_adapter_status; + ops->reset_slot = reset_slot; if (MRL_SENS(ctrl)) ops->get_latch_status = get_latch_status; if (ATTN_LED(ctrl)) { @@ -223,6 +225,16 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) return pciehp_get_adapter_status(slot, value); } +static int reset_slot(struct hotplug_slot *hotplug_slot, int probe) +{ + struct slot *slot = hotplug_slot->private; + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + return pciehp_reset_slot(slot, probe); +} + static int pciehp_probe(struct pcie_device *dev) { int rc; diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index b2255736ac8..51f56ef4ab6 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -749,6 +749,37 @@ static void pcie_disable_notification(struct controller *ctrl) ctrl_warn(ctrl, "Cannot disable software notification\n"); } +/* + * pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary + * bus reset of the bridge, but if the slot supports surprise removal we need + * to disable presence detection around the bus reset and clear any spurious + * events after. + */ +int pciehp_reset_slot(struct slot *slot, int probe) +{ + struct controller *ctrl = slot->ctrl; + + if (probe) + return 0; + + if (HP_SUPR_RM(ctrl)) { + pcie_write_cmd(ctrl, 0, PCI_EXP_SLTCTL_PDCE); + if (pciehp_poll_mode) + del_timer_sync(&ctrl->poll_timer); + } + + pci_reset_bridge_secondary_bus(ctrl->pcie->port); + + if (HP_SUPR_RM(ctrl)) { + pciehp_writew(ctrl, PCI_EXP_SLTSTA, PCI_EXP_SLTSTA_PDC); + pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PDCE, PCI_EXP_SLTCTL_PDCE); + if (pciehp_poll_mode) + int_poll_timeout(ctrl->poll_timer.data); + } + + return 0; +} + int pcie_init_notification(struct controller *ctrl) { if (pciehp_request_irq(ctrl)) diff --git a/drivers/pci/hotplug/pcihp_slot.c b/drivers/pci/hotplug/pcihp_slot.c index fec2d5b7544..16f92035231 100644 --- a/drivers/pci/hotplug/pcihp_slot.c +++ b/drivers/pci/hotplug/pcihp_slot.c @@ -160,9 +160,8 @@ void pci_configure_slot(struct pci_dev *dev) (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) return; - if (dev->bus && dev->bus->self) - pcie_bus_configure_settings(dev->bus, - dev->bus->self->pcie_mpss); + if (dev->bus) + pcie_bus_configure_settings(dev->bus); memset(&hpp, 0, sizeof(hpp)); ret = pci_get_hp_params(dev, &hpp); diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c index ea3fa90d020..66e505ca24e 100644 --- a/drivers/pci/hotplug/s390_pci_hpc.c +++ b/drivers/pci/hotplug/s390_pci_hpc.c @@ -79,8 +79,6 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) if (rc) goto out_deconfigure; - slot->zdev->state = ZPCI_FN_STATE_ONLINE; - pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN); pci_bus_add_devices(slot->zdev->bus); @@ -148,7 +146,7 @@ static struct hotplug_slot_ops s390_hotplug_slot_ops = { .get_adapter_status = get_adapter_status, }; -static int init_pci_slot(struct zpci_dev *zdev) +int zpci_init_slot(struct zpci_dev *zdev) { struct hotplug_slot *hotplug_slot; struct hotplug_slot_info *info; @@ -202,7 +200,7 @@ error: return -ENOMEM; } -static void exit_pci_slot(struct zpci_dev *zdev) +void zpci_exit_slot(struct zpci_dev *zdev) { struct list_head *tmp, *n; struct slot *slot; @@ -215,60 +213,3 @@ static void exit_pci_slot(struct zpci_dev *zdev) pci_hp_deregister(slot->hotplug_slot); } } - -static struct pci_hp_callback_ops hp_ops = { - .create_slot = init_pci_slot, - .remove_slot = exit_pci_slot, -}; - -static void __init init_pci_slots(void) -{ - struct zpci_dev *zdev; - - /* - * Create a structure for each slot, and register that slot - * with the pci_hotplug subsystem. - */ - mutex_lock(&zpci_list_lock); - list_for_each_entry(zdev, &zpci_list, entry) { - init_pci_slot(zdev); - } - mutex_unlock(&zpci_list_lock); -} - -static void __exit exit_pci_slots(void) -{ - struct list_head *tmp, *n; - struct slot *slot; - - /* - * Unregister all of our slots with the pci_hotplug subsystem. - * Memory will be freed in release_slot() callback after slot's - * lifespan is finished. - */ - list_for_each_safe(tmp, n, &s390_hotplug_slot_list) { - slot = list_entry(tmp, struct slot, slot_list); - list_del(&slot->slot_list); - pci_hp_deregister(slot->hotplug_slot); - } -} - -static int __init pci_hotplug_s390_init(void) -{ - if (!s390_pci_probe) - return -EOPNOTSUPP; - - zpci_register_hp_ops(&hp_ops); - init_pci_slots(); - - return 0; -} - -static void __exit pci_hotplug_s390_exit(void) -{ - exit_pci_slots(); - zpci_deregister_hp_ops(); -} - -module_init(pci_hotplug_s390_init); -module_exit(pci_hotplug_s390_exit); |