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