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 32 static 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 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) 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 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 } 92 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); 98 99 static struct attribute *default_attrs[] = { 100 &add_slot_attr.attr, 101 &remove_slot_attr.attr, 102 NULL, 103 }; 104 105 static struct attribute_group dlpar_attr_group = { 106 .attrs = default_attrs, 107 }; 108 109 static struct kobject *dlpar_kobj; 110 111 int 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 } 125 126 void dlpar_sysfs_exit(void) 127 { 128 sysfs_remove_group(dlpar_kobj, &dlpar_attr_group); 129 kobject_put(dlpar_kobj); 130 } 131