1ca01d6ddSTony Luck /* 2ca01d6ddSTony Luck * Persistent Storage - pstore.h 3ca01d6ddSTony Luck * 4ca01d6ddSTony Luck * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com> 5ca01d6ddSTony Luck * 6ca01d6ddSTony Luck * This code is the generic layer to export data records from platform 7ca01d6ddSTony Luck * level persistent storage via a file system. 8ca01d6ddSTony Luck * 9ca01d6ddSTony Luck * This program is free software; you can redistribute it and/or modify 10ca01d6ddSTony Luck * it under the terms of the GNU General Public License version 2 as 11ca01d6ddSTony Luck * published by the Free Software Foundation. 12ca01d6ddSTony Luck * 13ca01d6ddSTony Luck * This program is distributed in the hope that it will be useful, 14ca01d6ddSTony Luck * but WITHOUT ANY WARRANTY; without even the implied warranty of 15ca01d6ddSTony Luck * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16ca01d6ddSTony Luck * GNU General Public License for more details. 17ca01d6ddSTony Luck * 18ca01d6ddSTony Luck * You should have received a copy of the GNU General Public License 19ca01d6ddSTony Luck * along with this program; if not, write to the Free Software 20ca01d6ddSTony Luck * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21ca01d6ddSTony Luck */ 22ca01d6ddSTony Luck #ifndef _LINUX_PSTORE_H 23ca01d6ddSTony Luck #define _LINUX_PSTORE_H 24ca01d6ddSTony Luck 25ca01d6ddSTony Luck /* types */ 26ca01d6ddSTony Luck enum pstore_type_id { 27ca01d6ddSTony Luck PSTORE_TYPE_DMESG = 0, 28ca01d6ddSTony Luck PSTORE_TYPE_MCE = 1, 29ca01d6ddSTony Luck PSTORE_TYPE_UNKNOWN = 255 30ca01d6ddSTony Luck }; 31ca01d6ddSTony Luck 32ca01d6ddSTony Luck struct pstore_info { 33ca01d6ddSTony Luck struct module *owner; 34ca01d6ddSTony Luck char *name; 35ca01d6ddSTony Luck struct mutex buf_mutex; /* serialize access to 'buf' */ 36ca01d6ddSTony Luck char *buf; 37ca01d6ddSTony Luck size_t bufsize; 38*06cf91b4SChen Gong int (*open)(struct pstore_info *psi); 39*06cf91b4SChen Gong int (*close)(struct pstore_info *psi); 408d38d74bSChen Gong ssize_t (*read)(u64 *id, enum pstore_type_id *type, 41ca01d6ddSTony Luck struct timespec *time); 42ca01d6ddSTony Luck u64 (*write)(enum pstore_type_id type, size_t size); 43ca01d6ddSTony Luck int (*erase)(u64 id); 44ca01d6ddSTony Luck }; 45ca01d6ddSTony Luck 46ca01d6ddSTony Luck #ifdef CONFIG_PSTORE 47ca01d6ddSTony Luck extern int pstore_register(struct pstore_info *); 48ca01d6ddSTony Luck extern int pstore_write(enum pstore_type_id type, char *buf, size_t size); 49ca01d6ddSTony Luck #else 50ca01d6ddSTony Luck static inline int 51ca01d6ddSTony Luck pstore_register(struct pstore_info *psi) 52ca01d6ddSTony Luck { 53ca01d6ddSTony Luck return -ENODEV; 54ca01d6ddSTony Luck } 55ca01d6ddSTony Luck static inline int 56ca01d6ddSTony Luck pstore_write(enum pstore_type_id type, char *buf, size_t size) 57ca01d6ddSTony Luck { 58ca01d6ddSTony Luck return -ENODEV; 59ca01d6ddSTony Luck } 60ca01d6ddSTony Luck #endif 61ca01d6ddSTony Luck 62ca01d6ddSTony Luck #endif /*_LINUX_PSTORE_H*/ 63