#include "rpaphp.h"
int debug;
-static struct semaphore rpaphp_sem;
LIST_HEAD(rpaphp_slot_head);
-int num_slots;
#define DRIVER_VERSION "0.1"
#define DRIVER_AUTHOR "Linda Xie <lxie@us.ibm.com>"
module_param(debug, bool, 0644);
-static int rpaphp_get_attention_status(struct slot *slot)
-{
- return slot->hotplug_slot->info->attention_status;
-}
-
/**
* set_attention_status - set attention LED
* echo 0 > attention -- set LED OFF
*/
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
{
- int retval = 0;
+ int rc;
struct slot *slot = (struct slot *)hotplug_slot->private;
- down(&rpaphp_sem);
switch (value) {
case 0:
- retval = rpaphp_set_attention_status(slot, LED_OFF);
- hotplug_slot->info->attention_status = 0;
- break;
case 1:
- default:
- retval = rpaphp_set_attention_status(slot, LED_ON);
- hotplug_slot->info->attention_status = 1;
- break;
case 2:
- retval = rpaphp_set_attention_status(slot, LED_ID);
- hotplug_slot->info->attention_status = 2;
+ break;
+ default:
+ value = 1;
break;
}
- up(&rpaphp_sem);
- return retval;
+
+ rc = rtas_set_indicator(DR_INDICATOR, slot->index, value);
+ if (!rc)
+ hotplug_slot->info->attention_status = value;
+
+ return rc;
}
/**
* get_power_status - get power status of a slot
* @hotplug_slot: slot to get status
* @value: pointer to store status
- *
- *
*/
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
- int retval;
+ int retval, level;
struct slot *slot = (struct slot *)hotplug_slot->private;
- down(&rpaphp_sem);
- retval = rpaphp_get_power_status(slot, value);
- up(&rpaphp_sem);
+ retval = rtas_get_power_level (slot->power_domain, &level);
+ if (!retval)
+ *value = level;
return retval;
}
/**
* get_attention_status - get attention LED status
- *
- *
*/
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
- int retval = 0;
struct slot *slot = (struct slot *)hotplug_slot->private;
-
- down(&rpaphp_sem);
- *value = rpaphp_get_attention_status(slot);
- up(&rpaphp_sem);
- return retval;
+ *value = slot->hotplug_slot->info->attention_status;
+ return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
{
struct slot *slot = (struct slot *)hotplug_slot->private;
- int retval = 0;
+ int rc, state;
- down(&rpaphp_sem);
- retval = rpaphp_get_pci_adapter_status(slot, 0, value);
- up(&rpaphp_sem);
- return retval;
+ rc = rpaphp_get_sensor_state(slot, &state);
+
+ *value = NOT_VALID;
+ if (rc)
+ return rc;
+
+ if (state == EMPTY)
+ *value = EMPTY;
+ else if (state == PRESENT)
+ *value = slot->state;
+
+ return 0;
}
static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
struct slot *slot = (struct slot *)hotplug_slot->private;
- down(&rpaphp_sem);
switch (slot->type) {
case 1:
case 2:
break;
}
- up(&rpaphp_sem);
return 0;
}
return 1;
}
+/**
+ * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0
+ *
+ * This routine will return true only if the device node is
+ * a hotpluggable slot. This routine will return false
+ * for built-in pci slots (even when the built-in slots are
+ * dlparable.)
+ */
static int is_php_dn(struct device_node *dn, const int **indexes,
const int **names, const int **types, const int **power_domains)
{
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;
- }
- }
+ if (rc < 0)
+ return 0;
- return 0;
+ if (!is_php_type((char *) &drc_types[1]))
+ return 0;
+
+ *types = drc_types;
+ return 1;
}
/**
- * rpaphp_add_slot -- add hotplug or dlpar slot
+ * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem.
+ * @dn device node of slot
+ *
+ * This subroutine will register a hotplugable slot with the
+ * PCI hotplug infrastructure. This routine is typicaly called
+ * during boot time, if the hotplug slots are present at boot time,
+ * or is called later, by the dlpar add code, if the slot is
+ * being dynamically added during runtime.
+ *
+ * If the device node points at an embedded (built-in) slot, this
+ * routine will just return without doing anything, since embedded
+ * slots cannot be hotplugged.
*
- * 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.
+ * To remove a slot, it suffices to call rpaphp_deregister_slot()
*/
int rpaphp_add_slot(struct device_node *dn)
{
const int *indexes, *names, *types, *power_domains;
char *name, *type;
+ if (!dn->name || strcmp(dn->name, "pci"))
+ return 0;
+
+ /* If this is not a hotplug slot, return without doing anything. */
+ if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
+ return 0;
+
dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
/* register PCI devices */
- if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
- 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)) {
-
- 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);
+ name = (char *) &names[1];
+ type = (char *) &types[1];
+ for (i = 0; i < indexes[0]; i++) {
+
+ slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
+ if (!slot)
+ return -ENOMEM;
+
+ slot->type = simple_strtoul(type, NULL, 10);
- dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
- indexes[i + 1], name, type);
+ dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
+ indexes[i + 1], name, type);
- retval = rpaphp_register_pci_slot(slot);
- }
+ retval = rpaphp_enable_slot(slot);
+ if (!retval)
+ retval = rpaphp_register_slot(slot);
+
+ if (retval)
+ dealloc_slot_struct(slot);
+
+ name += strlen(name) + 1;
+ type += strlen(type) + 1;
}
-exit:
- dbg("%s - Exit: num_slots=%d rc[%d]\n",
- __FUNCTION__, num_slots, retval);
+ dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+
+ /* XXX FIXME: reports a failure only if last entry in loop failed */
return retval;
}
struct device_node *dn = NULL;
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
- init_MUTEX(&rpaphp_sem);
while ((dn = of_find_node_by_name(dn, "pci")))
rpaphp_add_slot(dn);
cleanup_slots();
}
-static int __enable_slot(struct slot *slot)
+static int enable_slot(struct hotplug_slot *hotplug_slot)
{
+ struct slot *slot = (struct slot *)hotplug_slot->private;
int state;
int retval;
return 0;
}
-static int enable_slot(struct hotplug_slot *hotplug_slot)
+static int disable_slot(struct hotplug_slot *hotplug_slot)
{
- int retval;
struct slot *slot = (struct slot *)hotplug_slot->private;
-
- down(&rpaphp_sem);
- retval = __enable_slot(slot);
- up(&rpaphp_sem);
-
- return retval;
-}
-
-static int __disable_slot(struct slot *slot)
-{
- 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);
- }
-
+ pcibios_remove_pci_devices(slot->bus);
slot->state = NOT_CONFIGURED;
return 0;
}
-static int disable_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = (struct slot *)hotplug_slot->private;
- int retval;
-
- down(&rpaphp_sem);
- retval = __disable_slot (slot);
- up(&rpaphp_sem);
-
- return retval;
-}
-
struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
.owner = THIS_MODULE,
.enable_slot = enable_slot,
projects / linux-drm-fsl-dcu.git / blobdiff