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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Interface for Dynamic Logical Partitioning of I/O Slots on
4 * RPA-compliant PPC64 platform.
5 *
6 * John Rose <johnrose@austin.ibm.com>
7 * October 2003
8 *
9 * Copyright (C) 2003 IBM.
10 */
11#include <linux/kobject.h>
12#include <linux/string.h>
13#include <linux/pci.h>
14#include <linux/pci_hotplug.h>
15#include "rpaphp.h"
16#include "rpadlpar.h"
17#include "../pci.h"
18
19#define DLPAR_KOBJ_NAME "control"
20
21/* Those two have no quotes because they are passed to __ATTR() which
22 * stringifies the argument (yuck !)
23 */
24#define ADD_SLOT_ATTR_NAME add_slot
25#define REMOVE_SLOT_ATTR_NAME remove_slot
26
27static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr,
28 const char *buf, size_t nbytes)
29{
30 char drc_name[MAX_DRC_NAME_LEN];
31 char *end;
32 int rc;
33
34 if (nbytes >= MAX_DRC_NAME_LEN)
35 return 0;
36
37 strscpy(drc_name, buf, nbytes + 1);
38
39 end = strchr(drc_name, '\n');
40 if (end)
41 *end = '\0';
42
43 rc = dlpar_add_slot(drc_name);
44 if (rc)
45 return rc;
46
47 return nbytes;
48}
49
50static ssize_t add_slot_show(struct kobject *kobj,
51 struct kobj_attribute *attr, char *buf)
52{
53 return sysfs_emit(buf, "0\n");
54}
55
56static ssize_t remove_slot_store(struct kobject *kobj,
57 struct kobj_attribute *attr,
58 const char *buf, size_t nbytes)
59{
60 char drc_name[MAX_DRC_NAME_LEN];
61 int rc;
62 char *end;
63
64 if (nbytes >= MAX_DRC_NAME_LEN)
65 return 0;
66
67 strscpy(drc_name, buf, nbytes + 1);
68
69 end = strchr(drc_name, '\n');
70 if (end)
71 *end = '\0';
72
73 rc = dlpar_remove_slot(drc_name);
74 if (rc)
75 return rc;
76
77 return nbytes;
78}
79
80static ssize_t remove_slot_show(struct kobject *kobj,
81 struct kobj_attribute *attr, char *buf)
82{
83 return sysfs_emit(buf, "0\n");
84}
85
86static struct kobj_attribute add_slot_attr =
87 __ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store);
88
89static struct kobj_attribute remove_slot_attr =
90 __ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store);
91
92static struct attribute *default_attrs[] = {
93 &add_slot_attr.attr,
94 &remove_slot_attr.attr,
95 NULL,
96};
97
98static const struct attribute_group dlpar_attr_group = {
99 .attrs = default_attrs,
100};
101
102static struct kobject *dlpar_kobj;
103
104int dlpar_sysfs_init(void)
105{
106 int error;
107
108 dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME,
109 &pci_slots_kset->kobj);
110 if (!dlpar_kobj)
111 return -EINVAL;
112
113 error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group);
114 if (error)
115 kobject_put(dlpar_kobj);
116 return error;
117}
118
119void dlpar_sysfs_exit(void)
120{
121 sysfs_remove_group(dlpar_kobj, &dlpar_attr_group);
122 kobject_put(dlpar_kobj);
123}
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>
17#include <linux/pci.h>
18#include <linux/pci_hotplug.h>
19#include "rpadlpar.h"
20#include "../pci.h"
21
22#define DLPAR_KOBJ_NAME "control"
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
29
30#define MAX_DRC_NAME_LEN 64
31
32static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr,
33 const char *buf, size_t nbytes)
34{
35 char drc_name[MAX_DRC_NAME_LEN];
36 char *end;
37 int rc;
38
39 if (nbytes >= MAX_DRC_NAME_LEN)
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
49 rc = dlpar_add_slot(drc_name);
50 if (rc)
51 return rc;
52
53 return nbytes;
54}
55
56static ssize_t add_slot_show(struct kobject *kobj,
57 struct kobj_attribute *attr, char *buf)
58{
59 return sprintf(buf, "0\n");
60}
61
62static ssize_t remove_slot_store(struct kobject *kobj,
63 struct kobj_attribute *attr,
64 const char *buf, size_t nbytes)
65{
66 char drc_name[MAX_DRC_NAME_LEN];
67 int rc;
68 char *end;
69
70 if (nbytes >= MAX_DRC_NAME_LEN)
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
80 rc = dlpar_remove_slot(drc_name);
81 if (rc)
82 return rc;
83
84 return nbytes;
85}
86
87static ssize_t remove_slot_show(struct kobject *kobj,
88 struct kobj_attribute *attr, char *buf)
89{
90 return sprintf(buf, "0\n");
91}
92
93static struct kobj_attribute add_slot_attr =
94 __ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store);
95
96static struct kobj_attribute remove_slot_attr =
97 __ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store);
98
99static struct attribute *default_attrs[] = {
100 &add_slot_attr.attr,
101 &remove_slot_attr.attr,
102 NULL,
103};
104
105static struct attribute_group dlpar_attr_group = {
106 .attrs = default_attrs,
107};
108
109static struct kobject *dlpar_kobj;
110
111int dlpar_sysfs_init(void)
112{
113 int error;
114
115 dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME,
116 &pci_slots_kset->kobj);
117 if (!dlpar_kobj)
118 return -EINVAL;
119
120 error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group);
121 if (error)
122 kobject_put(dlpar_kobj);
123 return error;
124}
125
126void dlpar_sysfs_exit(void)
127{
128 sysfs_remove_group(dlpar_kobj, &dlpar_attr_group);
129 kobject_put(dlpar_kobj);
130}