#include "../pci.h" /* for pci_add_new_bus */
#include "rpaphp.h"
-static struct pci_bus *find_bus_among_children(struct pci_bus *bus,
- struct device_node *dn)
-{
- struct pci_bus *child = NULL;
- struct list_head *tmp;
- struct device_node *busdn;
-
- busdn = pci_bus_to_OF_node(bus);
- if (busdn == dn)
- return bus;
-
- list_for_each(tmp, &bus->children) {
- child = find_bus_among_children(pci_bus_b(tmp), dn);
- if (child)
- break;
- }
- return child;
-}
-
-struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
-{
- struct pci_dn *pdn = dn->data;
-
- if (!pdn || !pdn->phb || !pdn->phb->bus)
- return NULL;
-
- return find_bus_among_children(pdn->phb->bus, dn);
-}
-EXPORT_SYMBOL_GPL(rpaphp_find_pci_bus);
-
-int rpaphp_claim_resource(struct pci_dev *dev, int resource)
-{
- struct resource *res = &dev->resource[resource];
- struct resource *root = pci_find_parent_resource(dev, res);
- char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
- int err = -EINVAL;
-
- if (root != NULL) {
- err = request_resource(root, res);
- }
-
- if (err) {
- err("PCI: %s region %d of %s %s [%lx:%lx]\n",
- root ? "Address space collision on" :
- "No parent found for",
- resource, dtype, pci_name(dev), res->start, res->end);
- }
- return err;
-}
-
-EXPORT_SYMBOL_GPL(rpaphp_claim_resource);
-
-static int rpaphp_get_sensor_state(struct slot *slot, int *state)
+int rpaphp_get_sensor_state(struct slot *slot, int *state)
{
int rc;
int setlevel;
if (rc < 0) {
if (rc == -EFAULT || rc == -EEXIST) {
dbg("%s: slot must be power up to get sensor-state\n",
- __FUNCTION__);
+ __func__);
/* some slots have to be powered up
* before get-sensor will succeed.
&setlevel);
if (rc < 0) {
dbg("%s: power on slot[%s] failed rc=%d.\n",
- __FUNCTION__, slot->name, rc);
+ __func__, slot->name, rc);
} else {
rc = rtas_get_sensor(DR_ENTITY_SENSE,
slot->index, state);
}
} else if (rc == -ENODEV)
- info("%s: slot is unusable\n", __FUNCTION__);
+ info("%s: slot is unusable\n", __func__);
else
- err("%s failed to get sensor state\n", __FUNCTION__);
+ err("%s failed to get sensor state\n", __func__);
}
return rc;
}
/**
- * get_pci_adapter_status - get the status of a slot
- *
- * 0-- slot is empty
- * 1-- adapter is configured
- * 2-- adapter is not configured
- * 3-- not valid
+ * rpaphp_enable_slot - record slot state, config pci device
+ * @slot: target &slot
+ *
+ * Initialize values in the slot, and the hotplug_slot info
+ * structures to indicate if there is a pci card plugged into
+ * the slot. If the slot is not empty, run the pcibios routine
+ * to get pcibios stuff correctly set up.
*/
-int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
+int rpaphp_enable_slot(struct slot *slot)
{
+ int rc, level, state;
struct pci_bus *bus;
- int state, rc;
-
- *value = NOT_VALID;
- rc = rpaphp_get_sensor_state(slot, &state);
- if (rc)
- goto exit;
-
- if (state == EMPTY)
- *value = EMPTY;
- else if (state == PRESENT) {
- if (!is_init) {
- /* at run-time slot->state can be changed by */
- /* config/unconfig adapter */
- *value = slot->state;
- } else {
- bus = rpaphp_find_pci_bus(slot->dn);
- if (bus && !list_empty(&bus->devices))
- *value = CONFIGURED;
- else
- *value = NOT_CONFIGURED;
- }
- }
-exit:
- return rc;
-}
-
-/* Must be called before pci_bus_add_devices */
-void rpaphp_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
-{
- struct pci_dev *dev;
-
- list_for_each_entry(dev, &bus->devices, bus_list) {
- /*
- * Skip already-present devices (which are on the
- * global device list.)
- */
- if (list_empty(&dev->global_list)) {
- int i;
-
- /* Need to setup IOMMU tables */
- ppc_md.iommu_dev_setup(dev);
-
- if(fix_bus)
- pcibios_fixup_device_resources(dev, bus);
- pci_read_irq_line(dev);
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
-
- if (r->parent || !r->start || !r->flags)
- continue;
- rpaphp_claim_resource(dev, i);
- }
- }
- }
-}
-
-static void rpaphp_eeh_add_bus_device(struct pci_bus *bus)
-{
- struct pci_dev *dev;
-
- list_for_each_entry(dev, &bus->devices, bus_list) {
- eeh_add_device_late(dev);
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
- struct pci_bus *subbus = dev->subordinate;
- if (subbus)
- rpaphp_eeh_add_bus_device (subbus);
- }
- }
-}
-
-static int rpaphp_pci_config_bridge(struct pci_dev *dev)
-{
- u8 sec_busno;
- struct pci_bus *child_bus;
- struct pci_dev *child_dev;
-
- dbg("Enter %s: BRIDGE dev=%s\n", __FUNCTION__, pci_name(dev));
-
- /* get busno of downstream bus */
- pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_busno);
-
- /* add to children of PCI bridge dev->bus */
- child_bus = pci_add_new_bus(dev->bus, dev, sec_busno);
- if (!child_bus) {
- err("%s: could not add second bus\n", __FUNCTION__);
- return -EIO;
- }
- sprintf(child_bus->name, "PCI Bus #%02x", child_bus->number);
- /* do pci_scan_child_bus */
- pci_scan_child_bus(child_bus);
-
- list_for_each_entry(child_dev, &child_bus->devices, bus_list) {
- eeh_add_device_late(child_dev);
- }
+ struct hotplug_slot_info *info = slot->hotplug_slot->info;
- /* fixup new pci devices without touching bus struct */
- rpaphp_fixup_new_pci_devices(child_bus, 0);
+ info->adapter_status = NOT_VALID;
+ slot->state = EMPTY;
- /* Make the discovered devices available */
- pci_bus_add_devices(child_bus);
- return 0;
-}
-
-void rpaphp_init_new_devs(struct pci_bus *bus)
-{
- rpaphp_fixup_new_pci_devices(bus, 0);
- rpaphp_eeh_add_bus_device(bus);
-}
-EXPORT_SYMBOL_GPL(rpaphp_init_new_devs);
-
-/*****************************************************************************
- rpaphp_pci_config_slot() will configure all devices under the
- given slot->dn and return the the first pci_dev.
- *****************************************************************************/
-static struct pci_dev *
-rpaphp_pci_config_slot(struct pci_bus *bus)
-{
- struct device_node *dn = pci_bus_to_OF_node(bus);
- struct pci_dev *dev = NULL;
- int slotno;
- int num;
-
- dbg("Enter %s: dn=%s bus=%s\n", __FUNCTION__, dn->full_name, bus->name);
- if (!dn || !dn->child)
- return NULL;
-
- if (systemcfg->platform == PLATFORM_PSERIES_LPAR) {
- of_scan_bus(dn, bus);
- if (list_empty(&bus->devices)) {
- err("%s: No new device found\n", __FUNCTION__);
- return NULL;
- }
-
- rpaphp_init_new_devs(bus);
- pci_bus_add_devices(bus);
- dev = list_entry(&bus->devices, struct pci_dev, bus_list);
- } else {
- slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
-
- /* pci_scan_slot should find all children */
- num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
- if (num) {
- rpaphp_fixup_new_pci_devices(bus, 1);
- pci_bus_add_devices(bus);
- }
- if (list_empty(&bus->devices)) {
- err("%s: No new device found\n", __FUNCTION__);
- return NULL;
- }
- list_for_each_entry(dev, &bus->devices, bus_list) {
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
- rpaphp_pci_config_bridge(dev);
-
- rpaphp_eeh_add_bus_device(bus);
- }
- }
-
- return dev;
-}
-
-void rpaphp_eeh_init_nodes(struct device_node *dn)
-{
- struct device_node *sib;
-
- for (sib = dn->child; sib; sib = sib->sibling)
- rpaphp_eeh_init_nodes(sib);
- eeh_add_device_early(dn);
- return;
-
-}
-EXPORT_SYMBOL_GPL(rpaphp_eeh_init_nodes);
-
-static void print_slot_pci_funcs(struct pci_bus *bus)
-{
- struct device_node *dn;
- struct pci_dev *dev;
-
- dn = pci_bus_to_OF_node(bus);
- if (!dn)
- return;
-
- dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, dn->full_name);
- list_for_each_entry (dev, &bus->devices, bus_list)
- dbg("\t%s\n", pci_name(dev));
- return;
-}
-
-int rpaphp_config_pci_adapter(struct pci_bus *bus)
-{
- struct device_node *dn = pci_bus_to_OF_node(bus);
- struct pci_dev *dev;
- int rc = -ENODEV;
-
- dbg("Entry %s: slot[%s]\n", __FUNCTION__, dn->full_name);
- if (!dn)
- goto exit;
-
- rpaphp_eeh_init_nodes(dn);
- dev = rpaphp_pci_config_slot(bus);
- if (!dev) {
- err("%s: can't find any devices.\n", __FUNCTION__);
- goto exit;
- }
- print_slot_pci_funcs(bus);
- rc = 0;
-exit:
- dbg("Exit %s: rc=%d\n", __FUNCTION__, rc);
- return rc;
-}
-EXPORT_SYMBOL_GPL(rpaphp_config_pci_adapter);
-
-static void rpaphp_eeh_remove_bus_device(struct pci_dev *dev)
-{
- eeh_remove_device(dev);
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
- struct pci_bus *bus = dev->subordinate;
- struct list_head *ln;
- if (!bus)
- return;
- for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
- struct pci_dev *pdev = pci_dev_b(ln);
- if (pdev)
- rpaphp_eeh_remove_bus_device(pdev);
- }
-
- }
- return;
-}
-
-int rpaphp_unconfig_pci_adapter(struct pci_bus *bus)
-{
- struct pci_dev *dev, *tmp;
-
- list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
- rpaphp_eeh_remove_bus_device(dev);
- pci_remove_bus_device(dev);
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(rpaphp_unconfig_pci_adapter);
-
-static int setup_pci_hotplug_slot_info(struct slot *slot)
-{
- dbg("%s Initilize the PCI slot's hotplug->info structure ...\n",
- __FUNCTION__);
- rpaphp_get_power_status(slot, &slot->hotplug_slot->info->power_status);
- rpaphp_get_pci_adapter_status(slot, 1,
- &slot->hotplug_slot->info->
- adapter_status);
- if (slot->hotplug_slot->info->adapter_status == NOT_VALID) {
- err("%s: NOT_VALID: skip dn->full_name=%s\n",
- __FUNCTION__, slot->dn->full_name);
- return -EINVAL;
- }
- return 0;
-}
-
-static void set_slot_name(struct slot *slot)
-{
- struct pci_bus *bus = slot->bus;
- struct pci_dev *bridge;
-
- bridge = bus->self;
- if (bridge)
- strcpy(slot->name, pci_name(bridge));
- else
- sprintf(slot->name, "%04x:%02x:00.0", pci_domain_nr(bus),
- bus->number);
-}
+ /* Find out if the power is turned on for the slot */
+ rc = rtas_get_power_level(slot->power_domain, &level);
+ if (rc)
+ return rc;
+ info->power_status = level;
-static int setup_pci_slot(struct slot *slot)
-{
- struct device_node *dn = slot->dn;
- struct pci_bus *bus;
+ /* Figure out if there is an adapter in the slot */
+ rc = rpaphp_get_sensor_state(slot, &state);
+ if (rc)
+ return rc;
- BUG_ON(!dn);
- bus = rpaphp_find_pci_bus(dn);
+ bus = pcibios_find_pci_bus(slot->dn);
if (!bus) {
- err("%s: no pci_bus for dn %s\n", __FUNCTION__, dn->full_name);
- goto exit_rc;
+ err("%s: no pci_bus for dn %s\n", __func__, slot->dn->full_name);
+ return -EINVAL;
}
+ info->adapter_status = EMPTY;
slot->bus = bus;
slot->pci_devs = &bus->devices;
- set_slot_name(slot);
- /* find slot's pci_dev if it's not empty */
- if (slot->hotplug_slot->info->adapter_status == EMPTY) {
- slot->state = EMPTY; /* slot is empty */
- } else {
- /* slot is occupied */
- if (!dn->child) {
- /* non-empty slot has to have child */
- err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
- __FUNCTION__, slot->name);
- goto exit_rc;
+ /* if there's an adapter in the slot, go add the pci devices */
+ if (state == PRESENT) {
+ info->adapter_status = NOT_CONFIGURED;
+ slot->state = NOT_CONFIGURED;
+
+ /* non-empty slot has to have child */
+ if (!slot->dn->child) {
+ err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
+ __func__, slot->name);
+ return -EINVAL;
}
- if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) {
- dbg("%s CONFIGURING pci adapter in slot[%s]\n",
- __FUNCTION__, slot->name);
- if (rpaphp_config_pci_adapter(slot->bus)) {
- err("%s: CONFIG pci adapter failed\n", __FUNCTION__);
- goto exit_rc;
- }
+ if (list_empty(&bus->devices))
+ pcibios_add_pci_devices(bus);
- } else if (slot->hotplug_slot->info->adapter_status != CONFIGURED) {
- err("%s: slot[%s]'s adapter_status is NOT_VALID.\n",
- __FUNCTION__, slot->name);
- goto exit_rc;
- }
- print_slot_pci_funcs(slot->bus);
- if (!list_empty(slot->pci_devs)) {
+ if (!list_empty(&bus->devices)) {
+ info->adapter_status = CONFIGURED;
slot->state = CONFIGURED;
- } else {
- /* DLPAR add as opposed to
- * boot time */
- slot->state = NOT_CONFIGURED;
}
- }
- return 0;
-exit_rc:
- dealloc_slot_struct(slot);
- return -EINVAL;
-}
-
-int register_pci_slot(struct slot *slot)
-{
- int rc = -EINVAL;
-
- if (setup_pci_hotplug_slot_info(slot))
- goto exit_rc;
- if (setup_pci_slot(slot))
- goto exit_rc;
- rc = register_slot(slot);
-exit_rc:
- return rc;
-}
-
-int rpaphp_enable_pci_slot(struct slot *slot)
-{
- int retval = 0, state;
- retval = rpaphp_get_sensor_state(slot, &state);
- if (retval)
- goto exit;
- dbg("%s: sensor state[%d]\n", __FUNCTION__, state);
- /* if slot is not empty, enable the adapter */
- if (state == PRESENT) {
- dbg("%s : slot[%s] is occupied.\n", __FUNCTION__, slot->name);
- retval = rpaphp_config_pci_adapter(slot->bus);
- if (!retval) {
- slot->state = CONFIGURED;
- info("%s: devices in slot[%s] configured\n",
- __FUNCTION__, slot->name);
- } else {
- slot->state = NOT_CONFIGURED;
- dbg("%s: no pci_dev struct for adapter in slot[%s]\n",
- __FUNCTION__, slot->name);
+ if (rpaphp_debug) {
+ struct pci_dev *dev;
+ dbg("%s: pci_devs of slot[%s]\n", __func__, slot->dn->full_name);
+ list_for_each_entry (dev, &bus->devices, bus_list)
+ dbg("\t%s\n", pci_name(dev));
}
- } else if (state == EMPTY) {
- dbg("%s : slot[%s] is empty\n", __FUNCTION__, slot->name);
- slot->state = EMPTY;
- } else {
- err("%s: slot[%s] is in invalid state\n", __FUNCTION__,
- slot->name);
- slot->state = NOT_VALID;
- retval = -EINVAL;
}
-exit:
- dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
- return retval;
+
+ return 0;
}
+
projects / linux-2.6-omap-h63xx.git / blobdiff