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 "rpaphp.h" 20 #include "rpadlpar.h" 21 #include "../pci.h" 22 23 #define DLPAR_KOBJ_NAME "control" 24 25 /* Those two have no quotes because they are passed to __ATTR() which 26 * stringifies the argument (yuck !) 27 */ 28 #define ADD_SLOT_ATTR_NAME add_slot 29 #define REMOVE_SLOT_ATTR_NAME remove_slot 30 31 static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr, 32 const char *buf, size_t nbytes) 33 { 34 char drc_name[MAX_DRC_NAME_LEN]; 35 char *end; 36 int rc; 37 38 if (nbytes >= MAX_DRC_NAME_LEN) 39 return 0; 40 41 memcpy(drc_name, buf, nbytes); 42 43 end = strchr(drc_name, '\n'); 44 if (!end) 45 end = &drc_name[nbytes]; 46 *end = '\0'; 47 48 rc = dlpar_add_slot(drc_name); 49 if (rc) 50 return rc; 51 52 return nbytes; 53 } 54 55 static ssize_t add_slot_show(struct kobject *kobj, 56 struct kobj_attribute *attr, char *buf) 57 { 58 return sprintf(buf, "0\n"); 59 } 60 61 static ssize_t remove_slot_store(struct kobject *kobj, 62 struct kobj_attribute *attr, 63 const char *buf, size_t nbytes) 64 { 65 char drc_name[MAX_DRC_NAME_LEN]; 66 int rc; 67 char *end; 68 69 if (nbytes >= MAX_DRC_NAME_LEN) 70 return 0; 71 72 memcpy(drc_name, buf, nbytes); 73 74 end = strchr(drc_name, '\n'); 75 if (!end) 76 end = &drc_name[nbytes]; 77 *end = '\0'; 78 79 rc = dlpar_remove_slot(drc_name); 80 if (rc) 81 return rc; 82 83 return nbytes; 84 } 85 86 static ssize_t remove_slot_show(struct kobject *kobj, 87 struct kobj_attribute *attr, char *buf) 88 { 89 return sprintf(buf, "0\n"); 90 } 91 92 static struct kobj_attribute add_slot_attr = 93 __ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store); 94 95 static struct kobj_attribute remove_slot_attr = 96 __ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store); 97 98 static struct attribute *default_attrs[] = { 99 &add_slot_attr.attr, 100 &remove_slot_attr.attr, 101 NULL, 102 }; 103 104 static const struct attribute_group dlpar_attr_group = { 105 .attrs = default_attrs, 106 }; 107 108 static struct kobject *dlpar_kobj; 109 110 int dlpar_sysfs_init(void) 111 { 112 int error; 113 114 dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME, 115 &pci_slots_kset->kobj); 116 if (!dlpar_kobj) 117 return -EINVAL; 118 119 error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group); 120 if (error) 121 kobject_put(dlpar_kobj); 122 return error; 123 } 124 125 void dlpar_sysfs_exit(void) 126 { 127 sysfs_remove_group(dlpar_kobj, &dlpar_attr_group); 128 kobject_put(dlpar_kobj); 129 } 130