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-rw-r--r--drivers/pci/hotplug/rpadlpar_core.c44
-rw-r--r--drivers/pci/hotplug/rpaphp.h7
-rw-r--r--drivers/pci/hotplug/rpaphp_pci.c141
3 files changed, 75 insertions, 117 deletions
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index d7f1319f167..7f868edaa72 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -198,28 +198,6 @@ static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
return dev;
}
-static int dlpar_pci_remove_bus(struct pci_dev *bridge_dev)
-{
- struct pci_bus *secondary_bus;
-
- if (!bridge_dev) {
- printk(KERN_ERR "%s: unexpected null device\n",
- __FUNCTION__);
- return -EINVAL;
- }
-
- secondary_bus = bridge_dev->subordinate;
-
- if (unmap_bus_range(secondary_bus)) {
- printk(KERN_ERR "%s: failed to unmap bus range\n",
- __FUNCTION__);
- return -ERANGE;
- }
-
- pci_remove_bus_device(bridge_dev);
- return 0;
-}
-
static inline int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
{
struct pci_dev *dev;
@@ -415,14 +393,7 @@ static int dlpar_remove_vio_slot(struct device_node *dn, char *drc_name)
*/
int dlpar_remove_pci_slot(struct slot *slot, char *drc_name)
{
- struct pci_dev *bridge_dev;
-
- bridge_dev = slot->bridge;
- if (!bridge_dev) {
- printk(KERN_ERR "%s: unexpected null bridge device\n",
- __FUNCTION__);
- return -EIO;
- }
+ struct pci_bus *bus = slot->bus;
/* Remove hotplug slot */
if (rpaphp_remove_slot(slot)) {
@@ -431,13 +402,14 @@ int dlpar_remove_pci_slot(struct slot *slot, char *drc_name)
return -EIO;
}
- /* Remove pci bus */
-
- if (dlpar_pci_remove_bus(bridge_dev)) {
- printk(KERN_ERR "%s: unable to remove pci bus %s\n",
- __FUNCTION__, drc_name);
- return -EIO;
+ if (unmap_bus_range(bus)) {
+ printk(KERN_ERR "%s: failed to unmap bus range\n",
+ __FUNCTION__);
+ return -ERANGE;
}
+
+ BUG_ON(!bus->self);
+ pci_remove_bus_device(bus->self);
return 0;
}
diff --git a/drivers/pci/hotplug/rpaphp.h b/drivers/pci/hotplug/rpaphp.h
index 2d9f420dfa4..9f050fde80c 100644
--- a/drivers/pci/hotplug/rpaphp.h
+++ b/drivers/pci/hotplug/rpaphp.h
@@ -80,10 +80,9 @@ struct slot {
char *name;
char *location;
u8 removable;
- struct device_node *dn; /* slot's device_node in OFDT */
- /* dn has phb info */
- struct pci_dev *bridge; /* slot's pci_dev in pci_devices */
- struct list_head *pci_devs; /* pci_devs in PCI slot */
+ struct device_node *dn;
+ struct pci_bus *bus;
+ struct list_head *pci_devs;
struct hotplug_slot *hotplug_slot;
};
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 30d10fcc24b..54fff5fb009 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -45,6 +45,32 @@ struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn)
return dev;
}
+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)
+{
+ BUG_ON(!dn->phb || !dn->phb->bus);
+
+ return find_bus_among_children(dn->phb->bus, dn);
+}
+
EXPORT_SYMBOL_GPL(rpaphp_find_pci_dev);
int rpaphp_claim_resource(struct pci_dev *dev, int resource)
@@ -69,11 +95,6 @@ int rpaphp_claim_resource(struct pci_dev *dev, int resource)
EXPORT_SYMBOL_GPL(rpaphp_claim_resource);
-static struct pci_dev *rpaphp_find_bridge_pdev(struct slot *slot)
-{
- return rpaphp_find_pci_dev(slot->dn);
-}
-
static int rpaphp_get_sensor_state(struct slot *slot, int *state)
{
int rc;
@@ -226,20 +247,22 @@ static int rpaphp_pci_config_bridge(struct pci_dev *dev)
static struct pci_dev *
rpaphp_pci_config_slot(struct device_node *dn, struct pci_bus *bus)
{
- struct device_node *eads_first_child = dn->child;
struct pci_dev *dev = NULL;
+ int slotno;
int num;
dbg("Enter %s: dn=%s bus=%s\n", __FUNCTION__, dn->full_name, bus->name);
- if (eads_first_child) {
- /* pci_scan_slot should find all children of EADs */
- num = pci_scan_slot(bus, PCI_DEVFN(PCI_SLOT(eads_first_child->devfn), 0));
+ if (dn->child) {
+ slotno = PCI_SLOT(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);
}
- dev = rpaphp_find_pci_dev(eads_first_child);
+ dev = rpaphp_find_pci_dev(dn->child);
if (!dev) {
err("No new device found\n");
return NULL;
@@ -273,31 +296,19 @@ static void print_slot_pci_funcs(struct slot *slot)
static int rpaphp_config_pci_adapter(struct slot *slot)
{
- struct pci_bus *pci_bus;
struct pci_dev *dev;
int rc = -ENODEV;
dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
- if (slot->bridge) {
-
- pci_bus = slot->bridge->subordinate;
- if (!pci_bus) {
- err("%s: can't find bus structure\n", __FUNCTION__);
- goto exit;
- }
- enable_eeh(slot->dn);
- dev = rpaphp_pci_config_slot(slot->dn, pci_bus);
- if (!dev) {
- err("%s: can't find any devices.\n", __FUNCTION__);
- goto exit;
- }
- print_slot_pci_funcs(slot);
- rc = 0;
- } else {
- /* slot is not enabled */
- err("slot doesn't have pci_dev structure\n");
+ enable_eeh(slot->dn);
+ dev = rpaphp_pci_config_slot(slot->dn, slot->bus);
+ if (!dev) {
+ err("%s: can't find any devices.\n", __FUNCTION__);
+ goto exit;
}
+ print_slot_pci_funcs(slot);
+ rc = 0;
exit:
dbg("Exit %s: rc=%d\n", __FUNCTION__, rc);
return rc;
@@ -323,13 +334,14 @@ static void rpaphp_eeh_remove_bus_device(struct pci_dev *dev)
int rpaphp_unconfig_pci_adapter(struct slot *slot)
{
- struct pci_dev *dev;
+ struct pci_dev *dev, *tmp;
int retval = 0;
- list_for_each_entry(dev, slot->pci_devs, bus_list)
+ list_for_each_entry_safe(dev, tmp, slot->pci_devs, bus_list) {
rpaphp_eeh_remove_bus_device(dev);
+ pci_remove_bus_device(dev);
+ }
- pci_remove_behind_bridge(slot->bridge);
slot->state = NOT_CONFIGURED;
info("%s: devices in slot[%s] unconfigured.\n", __FUNCTION__,
slot->name);
@@ -352,66 +364,41 @@ static int setup_pci_hotplug_slot_info(struct slot *slot)
return 0;
}
-static int set_phb_slot_name(struct slot *slot)
+static void set_slot_name(struct slot *slot)
{
- struct device_node *dn;
- struct pci_controller *phb;
- struct pci_bus *bus;
-
- dn = slot->dn;
- if (!dn) {
- return -EINVAL;
- }
- phb = dn->phb;
- if (!phb) {
- return -EINVAL;
- }
- bus = phb->bus;
- if (!bus) {
- return -EINVAL;
- }
+ struct pci_bus *bus = slot->bus;
+ struct pci_dev *bridge;
- sprintf(slot->name, "%04x:%02x:%02x.%x", pci_domain_nr(bus),
- bus->number, 0, 0);
- return 0;
+ 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);
}
static int setup_pci_slot(struct slot *slot)
{
+ struct device_node *dn = slot->dn;
struct pci_bus *bus;
- int rc;
- if (slot->type == PHB) {
- rc = set_phb_slot_name(slot);
- if (rc < 0) {
- err("%s: failed to set phb slot name\n", __FUNCTION__);
- goto exit_rc;
- }
- } else {
- slot->bridge = rpaphp_find_bridge_pdev(slot);
- if (!slot->bridge) {
- /* slot being added doesn't have pci_dev yet */
- err("%s: no pci_dev for bridge dn %s\n",
- __FUNCTION__, slot->name);
- goto exit_rc;
- }
-
- bus = slot->bridge->subordinate;
- if (!bus)
- goto exit_rc;
- slot->pci_devs = &bus->devices;
-
- dbg("%s set slot->name to %s\n", __FUNCTION__,
- pci_name(slot->bridge));
- strcpy(slot->name, pci_name(slot->bridge));
+ BUG_ON(!dn);
+ bus = rpaphp_find_pci_bus(dn);
+ if (!bus) {
+ err("%s: no pci_bus for dn %s\n", __FUNCTION__, dn->full_name);
+ goto exit_rc;
}
+ 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 (!(slot->dn->child)) {
+ 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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 17:13:52 +0000