* Send feedback to <lxie@us.ibm.com>
*
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include "../pci.h" /* for pci_add_new_bus */
/* and pci_do_scan_bus */
#include "rpaphp.h"
-#include "pci_hotplug.h"
int debug;
static struct semaphore rpaphp_sem;
module_param(debug, bool, 0644);
-static int enable_slot(struct hotplug_slot *slot);
-static int disable_slot(struct hotplug_slot *slot);
-static int set_attention_status(struct hotplug_slot *slot, u8 value);
-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_adapter_status(struct hotplug_slot *slot, u8 * value);
-static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value);
-static int rpaphp_disable_slot(struct pci_dev *dev);
-
-struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
- .owner = THIS_MODULE,
- .enable_slot = enable_slot,
- .disable_slot = disable_slot,
- .set_attention_status = set_attention_status,
- .get_power_status = get_power_status,
- .get_attention_status = get_attention_status,
- .get_adapter_status = get_adapter_status,
- .get_max_bus_speed = get_max_bus_speed,
-};
-
static int rpaphp_get_attention_status(struct slot *slot)
{
return slot->hotplug_slot->info->attention_status;
int retval = 0;
down(&rpaphp_sem);
- /* have to go through this */
- switch (slot->dev_type) {
- case PCI_DEV:
- retval = rpaphp_get_pci_adapter_status(slot, 0, value);
- break;
- case VIO_DEV:
- retval = rpaphp_get_vio_adapter_status(slot, 0, value);
- break;
- default:
- retval = -EINVAL;
- }
+ retval = rpaphp_get_pci_adapter_status(slot, 0, value);
up(&rpaphp_sem);
return retval;
}
return 0;
}
-int rpaphp_remove_slot(struct slot *slot)
+static int get_children_props(struct device_node *dn, const int **drc_indexes,
+ const int **drc_names, const int **drc_types,
+ const int **drc_power_domains)
{
- return deregister_slot(slot);
-}
-
-static int get_dn_properties(struct device_node *dn, int **indexes, int **names,
- int **types, int **power_domains)
-{
- *indexes = (int *) get_property(dn, "ibm,drc-indexes", NULL);
-
- /* &names[1] contains NULL terminated slot names */
- *names = (int *) get_property(dn, "ibm,drc-names", NULL);
+ const int *indexes, *names, *types, *domains;
- /* &types[1] contains NULL terminated slot types */
- *types = (int *) get_property(dn, "ibm,drc-types", NULL);
+ indexes = get_property(dn, "ibm,drc-indexes", NULL);
+ names = get_property(dn, "ibm,drc-names", NULL);
+ types = get_property(dn, "ibm,drc-types", NULL);
+ domains = get_property(dn, "ibm,drc-power-domains", NULL);
- /* power_domains[1...n] are the slot power domains */
- *power_domains = (int *) get_property(dn, "ibm,drc-power-domains", NULL);
-
- if (*indexes && *names && *types && *power_domains)
- return (1);
-
- return (0);
-}
+ if (!indexes || !names || !types || !domains) {
+ /* Slot does not have dynamically-removable children */
+ return -EINVAL;
+ }
+ if (drc_indexes)
+ *drc_indexes = indexes;
+ if (drc_names)
+ /* &drc_names[1] contains NULL terminated slot names */
+ *drc_names = names;
+ if (drc_types)
+ /* &drc_types[1] contains NULL terminated slot types */
+ *drc_types = types;
+ if (drc_power_domains)
+ *drc_power_domains = domains;
-static int is_php_dn(struct device_node *dn, int **indexes, int **names, int **types,
- int **power_domains)
-{
- if (!is_hotplug_capable(dn))
- return (0);
- if (!get_dn_properties(dn, indexes, names, types, power_domains))
- return (0);
- return (1);
+ return 0;
}
-static int is_dr_dn(struct device_node *dn, int **indexes, int **names, int **types,
- int **power_domains, int **my_drc_index)
+/* To get the DRC props describing the current node, first obtain it's
+ * my-drc-index property. Next obtain the DRC list from it's parent. Use
+ * the my-drc-index for correlation, and obtain the requested properties.
+ */
+int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
+ char **drc_name, char **drc_type, int *drc_power_domain)
{
- if (!is_hotplug_capable(dn))
- return (0);
+ const int *indexes, *names;
+ const int *types, *domains;
+ const unsigned int *my_index;
+ char *name_tmp, *type_tmp;
+ int i, rc;
+
+ my_index = get_property(dn, "ibm,my-drc-index", NULL);
+ if (!my_index) {
+ /* Node isn't DLPAR/hotplug capable */
+ return -EINVAL;
+ }
- *my_drc_index = (int *) get_property(dn, "ibm,my-drc-index", NULL);
- if(!*my_drc_index)
- return (0);
+ rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
+ if (rc < 0) {
+ return -EINVAL;
+ }
- if (!dn->parent)
- return (0);
+ name_tmp = (char *) &names[1];
+ type_tmp = (char *) &types[1];
+
+ /* Iterate through parent properties, looking for my-drc-index */
+ for (i = 0; i < indexes[0]; i++) {
+ if ((unsigned int) indexes[i + 1] == *my_index) {
+ if (drc_name)
+ *drc_name = name_tmp;
+ if (drc_type)
+ *drc_type = type_tmp;
+ if (drc_index)
+ *drc_index = *my_index;
+ if (drc_power_domain)
+ *drc_power_domain = domains[i+1];
+ return 0;
+ }
+ name_tmp += (strlen(name_tmp) + 1);
+ type_tmp += (strlen(type_tmp) + 1);
+ }
- return get_dn_properties(dn->parent, indexes, names, types, power_domains);
+ return -EINVAL;
}
-static inline int is_vdevice_root(struct device_node *dn)
+static int is_php_type(char *drc_type)
{
- return !strcmp(dn->name, "vdevice");
+ unsigned long value;
+ char *endptr;
+
+ /* PCI Hotplug nodes have an integer for drc_type */
+ value = simple_strtoul(drc_type, &endptr, 10);
+ if (endptr == drc_type)
+ return 0;
+
+ return 1;
}
-char *rpaphp_get_drc_name(struct device_node *dn)
+static int is_php_dn(struct device_node *dn, const int **indexes,
+ const int **names, const int **types, const int **power_domains)
{
- char *name, *ptr = NULL;
- int *drc_names, *drc_indexes, i;
- struct device_node *parent = dn->parent;
- u32 *my_drc_index;
-
- if (!parent)
- return NULL;
-
- my_drc_index = (u32 *) get_property(dn, "ibm,my-drc-index", NULL);
- if (!my_drc_index)
- return NULL;
-
- drc_names = (int *) get_property(parent, "ibm,drc-names", NULL);
- drc_indexes = (int *) get_property(parent, "ibm,drc-indexes", NULL);
- if (!drc_names || !drc_indexes)
- return NULL;
-
- name = (char *) &drc_names[1];
- for (i = 0; i < drc_indexes[0]; i++, name += (strlen(name) + 1)) {
- if (drc_indexes[i + 1] == *my_drc_index) {
- ptr = (char *) name;
- break;
+ const int *drc_types;
+ int rc;
+
+ rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
+ if (rc >= 0) {
+ if (is_php_type((char *) &drc_types[1])) {
+ *types = drc_types;
+ return 1;
}
}
- return ptr;
+ return 0;
}
-/****************************************************************
+/**
+ * rpaphp_add_slot -- add hotplug or dlpar slot
+ *
* rpaphp not only registers PCI hotplug slots(HOTPLUG),
* but also logical DR slots(EMBEDDED).
* HOTPLUG slot: An adapter can be physically added/removed.
* EMBEDDED slot: An adapter can be logically removed/added
* from/to a partition with the slot.
- ***************************************************************/
+ */
int rpaphp_add_slot(struct device_node *dn)
{
struct slot *slot;
int retval = 0;
- int i, *my_drc_index, slot_type;
- int *indexes, *names, *types, *power_domains;
+ int i;
+ const int *indexes, *names, *types, *power_domains;
char *name, *type;
dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
- if (dn->parent && is_vdevice_root(dn->parent)) {
- /* register a VIO device */
- retval = register_vio_slot(dn);
- goto exit;
- }
-
/* register PCI devices */
if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
- if (is_php_dn(dn, &indexes, &names, &types, &power_domains))
- slot_type = HOTPLUG;
- else if (is_dr_dn(dn, &indexes, &names, &types, &power_domains, &my_drc_index))
- slot_type = EMBEDDED;
- else goto exit;
+ if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
+ goto exit;
name = (char *) &names[1];
type = (char *) &types[1];
for (i = 0; i < indexes[0]; i++,
- name += (strlen(name) + 1), type += (strlen(type) + 1)) {
+ name += (strlen(name) + 1), type += (strlen(type) + 1)) {
- if ( slot_type == HOTPLUG ||
- (slot_type == EMBEDDED && indexes[i + 1] == my_drc_index[0])) {
-
- if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
- power_domains[i + 1]))) {
- retval = -ENOMEM;
- goto exit;
- }
- if (slot_type == EMBEDDED)
- slot->type = EMBEDDED;
- else
- slot->type = simple_strtoul(type, NULL, 10);
+ if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
+ power_domains[i + 1]))) {
+ retval = -ENOMEM;
+ goto exit;
+ }
+ slot->type = simple_strtoul(type, NULL, 10);
- dbg(" Found drc-index:0x%x drc-name:%s drc-type:%s\n",
+ dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
indexes[i + 1], name, type);
- retval = register_pci_slot(slot);
- if (slot_type == EMBEDDED)
- goto exit;
- }
+ retval = rpaphp_register_pci_slot(slot);
}
}
exit:
return retval;
}
-/*
- * init_slots - initialize 'struct slot' structures for each slot
- *
- */
-static void init_slots(void)
-{
- struct device_node *dn;
-
- for (dn = find_all_nodes(); dn; dn = dn->next)
- rpaphp_add_slot(dn);
-}
-
-static int __init init_rpa(void)
-{
-
- init_MUTEX(&rpaphp_sem);
-
- /* initialize internal data structure etc. */
- init_slots();
- if (!num_slots)
- return -ENODEV;
-
- return 0;
-}
-
static void __exit cleanup_slots(void)
{
struct list_head *tmp, *n;
static int __init rpaphp_init(void)
{
+ struct device_node *dn = NULL;
+
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ init_MUTEX(&rpaphp_sem);
- /* read all the PRA info from the system */
- return init_rpa();
+ while ((dn = of_find_node_by_name(dn, "pci")))
+ rpaphp_add_slot(dn);
+
+ return 0;
}
static void __exit rpaphp_exit(void)
cleanup_slots();
}
-static int enable_slot(struct hotplug_slot *hotplug_slot)
+static int __enable_slot(struct slot *slot)
{
- int retval = 0;
- struct slot *slot = (struct slot *)hotplug_slot->private;
+ int state;
+ int retval;
- if (slot->state == CONFIGURED) {
- dbg("%s: %s is already enabled\n", __FUNCTION__, slot->name);
- goto exit;
+ if (slot->state == CONFIGURED)
+ return 0;
+
+ retval = rpaphp_get_sensor_state(slot, &state);
+ if (retval)
+ return retval;
+
+ if (state == PRESENT) {
+ pcibios_add_pci_devices(slot->bus);
+ slot->state = CONFIGURED;
+ } else if (state == EMPTY) {
+ slot->state = EMPTY;
+ } else {
+ err("%s: slot[%s] is in invalid state\n", __FUNCTION__, slot->name);
+ slot->state = NOT_VALID;
+ return -EINVAL;
}
+ return 0;
+}
+
+static int enable_slot(struct hotplug_slot *hotplug_slot)
+{
+ int retval;
+ struct slot *slot = (struct slot *)hotplug_slot->private;
- dbg("ENABLING SLOT %s\n", slot->name);
down(&rpaphp_sem);
- switch (slot->dev_type) {
- case PCI_DEV:
- retval = rpaphp_enable_pci_slot(slot);
- break;
- case VIO_DEV:
- retval = rpaphp_enable_vio_slot(slot);
- break;
- default:
- retval = -EINVAL;
- }
+ retval = __enable_slot(slot);
up(&rpaphp_sem);
-exit:
- dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+
return retval;
}
-static int rpaphp_disable_slot(struct pci_dev *dev)
+static int __disable_slot(struct slot *slot)
{
- return disable_slot(rpaphp_find_hotplug_slot(dev));
+ struct pci_dev *dev, *tmp;
+
+ if (slot->state == NOT_CONFIGURED)
+ return -EINVAL;
+
+ list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
+ eeh_remove_bus_device(dev);
+ pci_remove_bus_device(dev);
+ }
+
+ slot->state = NOT_CONFIGURED;
+ return 0;
}
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
- int retval = -EINVAL;
struct slot *slot = (struct slot *)hotplug_slot->private;
+ int retval;
- dbg("%s - Entry: slot[%s]\n", __FUNCTION__, slot->name);
-
- if (slot->state == NOT_CONFIGURED) {
- dbg("%s: %s is already disabled\n", __FUNCTION__, slot->name);
- goto exit;
- }
-
- dbg("DISABLING SLOT %s\n", slot->name);
down(&rpaphp_sem);
- switch (slot->dev_type) {
- case PCI_DEV:
- retval = rpaphp_unconfig_pci_adapter(slot);
- break;
- case VIO_DEV:
- retval = rpaphp_unconfig_vio_adapter(slot);
- break;
- default:
- retval = -ENODEV;
- }
+ retval = __disable_slot (slot);
up(&rpaphp_sem);
-exit:
- dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+
return retval;
}
+struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
+ .owner = THIS_MODULE,
+ .enable_slot = enable_slot,
+ .disable_slot = disable_slot,
+ .set_attention_status = set_attention_status,
+ .get_power_status = get_power_status,
+ .get_attention_status = get_attention_status,
+ .get_adapter_status = get_adapter_status,
+ .get_max_bus_speed = get_max_bus_speed,
+};
+
module_init(rpaphp_init);
module_exit(rpaphp_exit);
EXPORT_SYMBOL_GPL(rpaphp_add_slot);
-EXPORT_SYMBOL_GPL(rpaphp_remove_slot);
EXPORT_SYMBOL_GPL(rpaphp_slot_head);
-EXPORT_SYMBOL_GPL(rpaphp_get_drc_name);
+EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);
git://git.onelab.eu / linux-2.6.git / blobdiff