1 files changed, 267 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c
new file mode 100644
index 000000000000..ff2cbf0652d8
--- /dev/null
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -0,0 +1,267 @@
+/*
+ * RPA Virtual I/O device functions 
+ * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com>
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <lxie@us.ibm.com>
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
+#include <linux/pci.h>
+#include <asm/rtas.h>
+#include "rpaphp.h"
+
+static ssize_t removable_read_file (struct hotplug_slot *php_slot, char *buf)
+{
+        u8 value;
+        int retval = -ENOENT;
+        struct slot *slot = (struct slot *)php_slot->private;
+
+        if (!slot)
+                return retval;
+
+        value = slot->removable;
+        retval = sprintf (buf, "%d\n", value);
+        return retval;
+}
+
+static struct hotplug_slot_attribute hotplug_slot_attr_removable = {
+        .attr = {.name = "phy_removable", .mode = S_IFREG | S_IRUGO},
+        .show = removable_read_file,
+};
+
+static void rpaphp_sysfs_add_attr_removable (struct hotplug_slot *slot)
+{
+        sysfs_create_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
+}
+
+static void rpaphp_sysfs_remove_attr_removable (struct hotplug_slot *slot)
+{
+        sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_removable.attr);
+}
+
+static ssize_t location_read_file (struct hotplug_slot *php_slot, char *buf)
+{
+        char *value;
+        int retval = -ENOENT;
+        struct slot *slot = (struct slot *)php_slot->private;
+
+        if (!slot)
+                return retval;
+
+        value = slot->location;
+        retval = sprintf (buf, "%s\n", value);
+        return retval;
+}
+
+static struct hotplug_slot_attribute hotplug_slot_attr_location = {
+        .attr = {.name = "phy_location", .mode = S_IFREG | S_IRUGO},
+        .show = location_read_file,
+};
+
+static void rpaphp_sysfs_add_attr_location (struct hotplug_slot *slot)
+{
+        sysfs_create_file(&slot->kobj, &hotplug_slot_attr_location.attr);
+}
+
+static void rpaphp_sysfs_remove_attr_location (struct hotplug_slot *slot)
+{
+        sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_location.attr);
+}
+
+/* free up the memory used by a slot */
+static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
+{
+        struct slot *slot = (struct slot *) hotplug_slot->private;
+
+        dealloc_slot_struct(slot);
+}
+
+void dealloc_slot_struct(struct slot *slot)
+{
+        kfree(slot->hotplug_slot->info);
+        kfree(slot->hotplug_slot->name);
+        kfree(slot->hotplug_slot);
+        kfree(slot);
+        return;
+}
+
+struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
+                  int power_domain)
+{
+        struct slot *slot;
+        
+        slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
+        if (!slot)
+                goto error_nomem;
+        memset(slot, 0, sizeof (struct slot));
+        slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
+        if (!slot->hotplug_slot)
+                goto error_slot;        
+        memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
+        slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info),
+                                           GFP_KERNEL);
+        if (!slot->hotplug_slot->info)
+                goto error_hpslot;
+        memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
+        slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
+        if (!slot->hotplug_slot->name)
+                goto error_info;        
+        slot->location = kmalloc(strlen(drc_name) + 1, GFP_KERNEL);
+        if (!slot->location)
+                goto error_name;
+        slot->name = slot->hotplug_slot->name;
+        slot->dn = dn;
+        slot->index = drc_index;
+        strcpy(slot->location, drc_name);
+        slot->power_domain = power_domain;
+        slot->hotplug_slot->private = slot;
+        slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
+        slot->hotplug_slot->release = &rpaphp_release_slot;
+        
+        return (slot);
+
+error_name:
+        kfree(slot->hotplug_slot->name);
+error_info:
+        kfree(slot->hotplug_slot->info);
+error_hpslot:
+        kfree(slot->hotplug_slot);
+error_slot:
+        kfree(slot);
+error_nomem:
+        return NULL;
+}
+
+static int is_registered(struct slot *slot)
+{
+        struct slot             *tmp_slot;
+
+        list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
+                if (!strcmp(tmp_slot->name, slot->name))
+                        return 1;
+        }       
+        return 0;
+}
+
+int deregister_slot(struct slot *slot)
+{
+        int retval = 0;
+        struct hotplug_slot *php_slot = slot->hotplug_slot;
+
+         dbg("%s - Entry: deregistering slot=%s\n",
+                __FUNCTION__, slot->name);
+
+        list_del(&slot->rpaphp_slot_list);
+        
+        /* remove "phy_location" file */
+        rpaphp_sysfs_remove_attr_location(php_slot);
+
+        /* remove "phy_removable" file */
+        rpaphp_sysfs_remove_attr_removable(php_slot);
+
+        retval = pci_hp_deregister(php_slot);
+        if (retval)
+                err("Problem unregistering a slot %s\n", slot->name);
+        else
+                num_slots--;
+
+        dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+        return retval;
+}
+
+int register_slot(struct slot *slot)
+{
+        int retval;
+
+        dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n", 
+                __FUNCTION__, slot->dn->full_name, slot->index, slot->name, 
+                slot->power_domain, slot->type);
+        /* should not try to register the same slot twice */
+        if (is_registered(slot)) { /* should't be here */
+                err("register_slot: slot[%s] is already registered\n", slot->name);
+                rpaphp_release_slot(slot->hotplug_slot);
+                return -EAGAIN;
+        }       
+        retval = pci_hp_register(slot->hotplug_slot);
+        if (retval) {
+                err("pci_hp_register failed with error %d\n", retval);
+                rpaphp_release_slot(slot->hotplug_slot);
+                return retval;
+        }
+        
+        /* create "phy_locatoin" file */
+        rpaphp_sysfs_add_attr_location(slot->hotplug_slot);     
+
+        /* create "phy_removable" file */
+        rpaphp_sysfs_add_attr_removable(slot->hotplug_slot);    
+
+        /* add slot to our internal list */
+        dbg("%s adding slot[%s] to rpaphp_slot_list\n",
+            __FUNCTION__, slot->name);
+
+        list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
+
+        if (slot->dev_type == VIO_DEV)
+                info("Slot [%s](VIO location=%s) registered\n",
+                     slot->name, slot->location);
+        else
+                info("Slot [%s](PCI location=%s) registered\n",
+                     slot->name, slot->location);
+        num_slots++;
+        return 0;
+}
+
+int rpaphp_get_power_status(struct slot *slot, u8 * value)
+{
+        int rc = 0, level;
+        
+        if (slot->type == HOTPLUG) {
+                rc = rtas_get_power_level(slot->power_domain, &level);
+                if (!rc) {
+                        dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
+                                __FUNCTION__, slot->name, slot->power_domain, level);
+                        *value = level;
+                } else
+                        err("failed to get power-level for slot(%s), rc=0x%x\n",
+                                slot->location, rc);
+        } else {
+                dbg("%s report POWER_ON for EMBEDDED or PHB slot %s\n",
+                        __FUNCTION__, slot->location);
+                *value = (u8) POWER_ON;
+        }
+
+        return rc;
+}
+
+int rpaphp_set_attention_status(struct slot *slot, u8 status)
+{
+        int rc;
+
+        /* status: LED_OFF or LED_ON */
+        rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
+        if (rc < 0)
+                err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
+                    slot->name, slot->location, slot->index, status, rc);
+
+        return rc;
+}