Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Interface for Dynamic Logical Partitioning of I/O Slots on | |
3 | * RPA-compliant PPC64 platform. | |
4 | * | |
5 | * John Rose <johnrose@austin.ibm.com> | |
6 | * October 2003 | |
7 | * | |
8 | * Copyright (C) 2003 IBM. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | #include <linux/kobject.h> | |
16 | #include <linux/string.h> | |
f46753c5 | 17 | #include <linux/pci.h> |
7a54f25c | 18 | #include <linux/pci_hotplug.h> |
1da177e4 | 19 | #include "rpadlpar.h" |
f46753c5 | 20 | #include "../pci.h" |
1da177e4 LT |
21 | |
22 | #define DLPAR_KOBJ_NAME "control" | |
a9b841e1 BH |
23 | |
24 | /* Those two have no quotes because they are passed to __ATTR() which | |
25 | * stringifies the argument (yuck !) | |
26 | */ | |
27 | #define ADD_SLOT_ATTR_NAME add_slot | |
28 | #define REMOVE_SLOT_ATTR_NAME remove_slot | |
1da177e4 LT |
29 | |
30 | #define MAX_DRC_NAME_LEN 64 | |
31 | ||
f55842f2 GKH |
32 | static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr, |
33 | const char *buf, size_t nbytes) | |
1da177e4 LT |
34 | { |
35 | char drc_name[MAX_DRC_NAME_LEN]; | |
36 | char *end; | |
f55842f2 | 37 | int rc; |
1da177e4 | 38 | |
02fe75a9 | 39 | if (nbytes >= MAX_DRC_NAME_LEN) |
1da177e4 LT |
40 | return 0; |
41 | ||
42 | memcpy(drc_name, buf, nbytes); | |
43 | ||
44 | end = strchr(drc_name, '\n'); | |
45 | if (!end) | |
46 | end = &drc_name[nbytes]; | |
47 | *end = '\0'; | |
48 | ||
f55842f2 GKH |
49 | rc = dlpar_add_slot(drc_name); |
50 | if (rc) | |
51 | return rc; | |
1da177e4 LT |
52 | |
53 | return nbytes; | |
54 | } | |
55 | ||
f55842f2 GKH |
56 | static ssize_t add_slot_show(struct kobject *kobj, |
57 | struct kobj_attribute *attr, char *buf) | |
58 | { | |
59 | return sprintf(buf, "0\n"); | |
60 | } | |
61 | ||
62 | static ssize_t remove_slot_store(struct kobject *kobj, | |
63 | struct kobj_attribute *attr, | |
64 | const char *buf, size_t nbytes) | |
1da177e4 LT |
65 | { |
66 | char drc_name[MAX_DRC_NAME_LEN]; | |
f55842f2 | 67 | int rc; |
1da177e4 LT |
68 | char *end; |
69 | ||
02fe75a9 | 70 | if (nbytes >= MAX_DRC_NAME_LEN) |
1da177e4 LT |
71 | return 0; |
72 | ||
73 | memcpy(drc_name, buf, nbytes); | |
74 | ||
75 | end = strchr(drc_name, '\n'); | |
76 | if (!end) | |
77 | end = &drc_name[nbytes]; | |
78 | *end = '\0'; | |
79 | ||
f55842f2 GKH |
80 | rc = dlpar_remove_slot(drc_name); |
81 | if (rc) | |
82 | return rc; | |
1da177e4 LT |
83 | |
84 | return nbytes; | |
85 | } | |
86 | ||
f55842f2 GKH |
87 | static ssize_t remove_slot_show(struct kobject *kobj, |
88 | struct kobj_attribute *attr, char *buf) | |
89 | { | |
90 | return sprintf(buf, "0\n"); | |
91 | } | |
1da177e4 | 92 | |
f55842f2 GKH |
93 | static struct kobj_attribute add_slot_attr = |
94 | __ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store); | |
95 | ||
96 | static struct kobj_attribute remove_slot_attr = | |
97 | __ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store); | |
1da177e4 LT |
98 | |
99 | static struct attribute *default_attrs[] = { | |
100 | &add_slot_attr.attr, | |
101 | &remove_slot_attr.attr, | |
102 | NULL, | |
103 | }; | |
104 | ||
f55842f2 GKH |
105 | static struct attribute_group dlpar_attr_group = { |
106 | .attrs = default_attrs, | |
1da177e4 LT |
107 | }; |
108 | ||
f55842f2 | 109 | static struct kobject *dlpar_kobj; |
1da177e4 LT |
110 | |
111 | int dlpar_sysfs_init(void) | |
112 | { | |
f55842f2 GKH |
113 | int error; |
114 | ||
115 | dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME, | |
f46753c5 | 116 | &pci_slots_kset->kobj); |
f55842f2 | 117 | if (!dlpar_kobj) |
1da177e4 | 118 | return -EINVAL; |
1da177e4 | 119 | |
f55842f2 GKH |
120 | error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group); |
121 | if (error) | |
c10997f6 | 122 | kobject_put(dlpar_kobj); |
f55842f2 | 123 | return error; |
1da177e4 LT |
124 | } |
125 | ||
126 | void dlpar_sysfs_exit(void) | |
127 | { | |
f55842f2 | 128 | sysfs_remove_group(dlpar_kobj, &dlpar_attr_group); |
c10997f6 | 129 | kobject_put(dlpar_kobj); |
1da177e4 | 130 | } |