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