/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */ /* * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. */ /* * Oracle DAX driver API definitions */ #ifndef _ORADAX_H #define _ORADAX_H #include <linux/types.h> #define CCB_KILL 0 #define CCB_INFO 1 #define CCB_DEQUEUE 2 struct dax_command { __u16 command; /* CCB_KILL/INFO/DEQUEUE */ __u16 ca_offset; /* offset into mmapped completion area */ }; struct ccb_kill_result { __u16 action; /* action taken to kill ccb */ }; struct ccb_info_result { __u16 state; /* state of enqueued ccb */ __u16 inst_num; /* dax instance number of enqueued ccb */ __u16 q_num; /* queue number of enqueued ccb */ __u16 q_pos; /* ccb position in queue */ }; struct ccb_exec_result { __u64 status_data; /* additional status data (e.g. bad VA) */ __u32 status; /* one of DAX_SUBMIT_* */ }; union ccb_result { struct ccb_exec_result exec; struct ccb_info_result info; struct ccb_kill_result kill; }; #define DAX_MMAP_LEN (16 * 1024) #define DAX_MAX_CCBS 15 #define DAX_CCB_BUF_MAXLEN (DAX_MAX_CCBS * 64) #define DAX_NAME "oradax" /* CCB_EXEC status */ #define DAX_SUBMIT_OK 0 #define DAX_SUBMIT_ERR_RETRY 1 #define DAX_SUBMIT_ERR_WOULDBLOCK 2 #define DAX_SUBMIT_ERR_BUSY 3 #define DAX_SUBMIT_ERR_THR_INIT 4 #define DAX_SUBMIT_ERR_ARG_INVAL 5 #define DAX_SUBMIT_ERR_CCB_INVAL 6 #define DAX_SUBMIT_ERR_NO_CA_AVAIL 7 #define DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS 8 #define DAX_SUBMIT_ERR_NOMAP 9 #define DAX_SUBMIT_ERR_NOACCESS 10 #define DAX_SUBMIT_ERR_TOOMANY 11 #define DAX_SUBMIT_ERR_UNAVAIL 12 #define DAX_SUBMIT_ERR_INTERNAL 13 /* CCB_INFO states - must match HV_CCB_STATE_* definitions */ #define DAX_CCB_COMPLETED 0 #define DAX_CCB_ENQUEUED 1 #define DAX_CCB_INPROGRESS 2 #define DAX_CCB_NOTFOUND 3 /* CCB_KILL actions - must match HV_CCB_KILL_* definitions */ #define DAX_KILL_COMPLETED 0 #define DAX_KILL_DEQUEUED 1 #define DAX_KILL_KILLED 2 #define DAX_KILL_NOTFOUND 3 #endif /* _ORADAX_H */