2 * RPA Virtual I/O device functions
3 * Copyright (C) 2004 Linda Xie <lxie@us.ibm.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * Send feedback to <lxie@us.ibm.com>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/kobject.h>
28 #include <linux/sysfs.h>
29 #include <linux/pci.h>
30 #include <linux/string.h>
31 #include <linux/slab.h>
36 static ssize_t
location_read_file (struct hotplug_slot
*php_slot
, char *buf
)
40 struct slot
*slot
= (struct slot
*)php_slot
->private;
45 value
= slot
->location
;
46 retval
= sprintf (buf
, "%s\n", value
);
50 static struct hotplug_slot_attribute php_attr_location
= {
51 .attr
= {.name
= "phy_location", .mode
= S_IFREG
| S_IRUGO
},
52 .show
= location_read_file
,
55 /* free up the memory used by a slot */
56 static void rpaphp_release_slot(struct hotplug_slot
*hotplug_slot
)
58 struct slot
*slot
= (struct slot
*) hotplug_slot
->private;
60 dealloc_slot_struct(slot
);
63 void dealloc_slot_struct(struct slot
*slot
)
65 kfree(slot
->hotplug_slot
->info
);
66 kfree(slot
->hotplug_slot
->name
);
67 kfree(slot
->hotplug_slot
);
72 struct slot
*alloc_slot_struct(struct device_node
*dn
, int drc_index
, char *drc_name
,
77 slot
= kzalloc(sizeof(struct slot
), GFP_KERNEL
);
80 slot
->hotplug_slot
= kzalloc(sizeof(struct hotplug_slot
), GFP_KERNEL
);
81 if (!slot
->hotplug_slot
)
83 slot
->hotplug_slot
->info
= kzalloc(sizeof(struct hotplug_slot_info
),
85 if (!slot
->hotplug_slot
->info
)
87 slot
->hotplug_slot
->name
= kmalloc(BUS_ID_SIZE
+ 1, GFP_KERNEL
);
88 if (!slot
->hotplug_slot
->name
)
90 slot
->location
= kmalloc(strlen(drc_name
) + 1, GFP_KERNEL
);
93 slot
->name
= slot
->hotplug_slot
->name
;
95 slot
->index
= drc_index
;
96 strcpy(slot
->location
, drc_name
);
97 slot
->power_domain
= power_domain
;
98 slot
->hotplug_slot
->private = slot
;
99 slot
->hotplug_slot
->ops
= &rpaphp_hotplug_slot_ops
;
100 slot
->hotplug_slot
->release
= &rpaphp_release_slot
;
105 kfree(slot
->hotplug_slot
->name
);
107 kfree(slot
->hotplug_slot
->info
);
109 kfree(slot
->hotplug_slot
);
116 static int is_registered(struct slot
*slot
)
118 struct slot
*tmp_slot
;
120 list_for_each_entry(tmp_slot
, &rpaphp_slot_head
, rpaphp_slot_list
) {
121 if (!strcmp(tmp_slot
->name
, slot
->name
))
127 int rpaphp_deregister_slot(struct slot
*slot
)
130 struct hotplug_slot
*php_slot
= slot
->hotplug_slot
;
132 dbg("%s - Entry: deregistering slot=%s\n",
133 __FUNCTION__
, slot
->name
);
135 list_del(&slot
->rpaphp_slot_list
);
137 /* remove "phy_location" file */
138 sysfs_remove_file(&php_slot
->kobj
, &php_attr_location
.attr
);
140 retval
= pci_hp_deregister(php_slot
);
142 err("Problem unregistering a slot %s\n", slot
->name
);
146 dbg("%s - Exit: rc[%d]\n", __FUNCTION__
, retval
);
149 EXPORT_SYMBOL_GPL(rpaphp_deregister_slot
);
151 int rpaphp_register_slot(struct slot
*slot
)
153 struct hotplug_slot
*php_slot
= slot
->hotplug_slot
;
156 dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
157 __FUNCTION__
, slot
->dn
->full_name
, slot
->index
, slot
->name
,
158 slot
->power_domain
, slot
->type
);
160 /* should not try to register the same slot twice */
161 if (is_registered(slot
)) {
162 err("rpaphp_register_slot: slot[%s] is already registered\n", slot
->name
);
167 retval
= pci_hp_register(php_slot
);
169 err("pci_hp_register failed with error %d\n", retval
);
173 /* create "phy_location" file */
174 retval
= sysfs_create_file(&php_slot
->kobj
, &php_attr_location
.attr
);
176 err("sysfs_create_file failed with error %d\n", retval
);
180 /* add slot to our internal list */
181 list_add(&slot
->rpaphp_slot_list
, &rpaphp_slot_head
);
182 info("Slot [%s](PCI location=%s) registered\n", slot
->name
,
188 pci_hp_deregister(php_slot
);
190 rpaphp_release_slot(php_slot
);
194 int rpaphp_get_power_status(struct slot
*slot
, u8
* value
)
198 rc
= rtas_get_power_level(slot
->power_domain
, &level
);
200 err("failed to get power-level for slot(%s), rc=0x%x\n",
205 dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
206 __FUNCTION__
, slot
->name
, slot
->power_domain
, level
);
212 int rpaphp_set_attention_status(struct slot
*slot
, u8 status
)
216 /* status: LED_OFF or LED_ON */
217 rc
= rtas_set_indicator(DR_INDICATOR
, slot
->index
, status
);
219 err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
220 slot
->name
, slot
->location
, slot
->index
, status
, rc
);