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123 lines
2.5 KiB
123 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Interface for Dynamic Logical Partitioning of I/O Slots on |
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* RPA-compliant PPC64 platform. |
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* |
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* John Rose <[email protected]> |
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* October 2003 |
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* |
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* Copyright (C) 2003 IBM. |
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*/ |
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#include <linux/kobject.h> |
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#include <linux/string.h> |
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#include <linux/pci.h> |
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#include <linux/pci_hotplug.h> |
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#include "rpaphp.h" |
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#include "rpadlpar.h" |
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#include "../pci.h" |
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#define DLPAR_KOBJ_NAME "control" |
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/* Those two have no quotes because they are passed to __ATTR() which |
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* stringifies the argument (yuck !) |
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*/ |
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#define ADD_SLOT_ATTR_NAME add_slot |
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#define REMOVE_SLOT_ATTR_NAME remove_slot |
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static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr, |
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const char *buf, size_t nbytes) |
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{ |
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char drc_name[MAX_DRC_NAME_LEN]; |
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char *end; |
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int rc; |
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if (nbytes >= MAX_DRC_NAME_LEN) |
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return 0; |
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strscpy(drc_name, buf, nbytes + 1); |
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end = strchr(drc_name, '\n'); |
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if (end) |
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*end = '\0'; |
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rc = dlpar_add_slot(drc_name); |
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if (rc) |
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return rc; |
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return nbytes; |
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} |
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static ssize_t add_slot_show(struct kobject *kobj, |
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struct kobj_attribute *attr, char *buf) |
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{ |
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return sysfs_emit(buf, "0\n"); |
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} |
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static ssize_t remove_slot_store(struct kobject *kobj, |
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struct kobj_attribute *attr, |
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const char *buf, size_t nbytes) |
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{ |
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char drc_name[MAX_DRC_NAME_LEN]; |
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int rc; |
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char *end; |
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if (nbytes >= MAX_DRC_NAME_LEN) |
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return 0; |
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strscpy(drc_name, buf, nbytes + 1); |
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end = strchr(drc_name, '\n'); |
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if (end) |
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*end = '\0'; |
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rc = dlpar_remove_slot(drc_name); |
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if (rc) |
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return rc; |
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return nbytes; |
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} |
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static ssize_t remove_slot_show(struct kobject *kobj, |
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struct kobj_attribute *attr, char *buf) |
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{ |
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return sysfs_emit(buf, "0\n"); |
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} |
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static struct kobj_attribute add_slot_attr = |
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__ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store); |
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static struct kobj_attribute remove_slot_attr = |
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__ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store); |
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static struct attribute *default_attrs[] = { |
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&add_slot_attr.attr, |
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&remove_slot_attr.attr, |
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NULL, |
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}; |
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static const struct attribute_group dlpar_attr_group = { |
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.attrs = default_attrs, |
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}; |
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static struct kobject *dlpar_kobj; |
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int dlpar_sysfs_init(void) |
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{ |
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int error; |
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dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME, |
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&pci_slots_kset->kobj); |
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if (!dlpar_kobj) |
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return -EINVAL; |
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error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group); |
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if (error) |
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kobject_put(dlpar_kobj); |
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return error; |
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} |
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void dlpar_sysfs_exit(void) |
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{ |
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sysfs_remove_group(dlpar_kobj, &dlpar_attr_group); |
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kobject_put(dlpar_kobj); |
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}
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