1/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */ 2/* 3 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 4 */ 5 6/* 7 * Oracle DAX driver API definitions 8 */ 9 10#ifndef _ORADAX_H 11#define _ORADAX_H 12 13#include <linux/types.h> 14 15#define CCB_KILL 0 16#define CCB_INFO 1 17#define CCB_DEQUEUE 2 18 19struct dax_command { 20 __u16 command; /* CCB_KILL/INFO/DEQUEUE */ 21 __u16 ca_offset; /* offset into mmapped completion area */ 22}; 23 24struct ccb_kill_result { 25 __u16 action; /* action taken to kill ccb */ 26}; 27 28struct ccb_info_result { 29 __u16 state; /* state of enqueued ccb */ 30 __u16 inst_num; /* dax instance number of enqueued ccb */ 31 __u16 q_num; /* queue number of enqueued ccb */ 32 __u16 q_pos; /* ccb position in queue */ 33}; 34 35struct ccb_exec_result { 36 __u64 status_data; /* additional status data (e.g. bad VA) */ 37 __u32 status; /* one of DAX_SUBMIT_* */ 38}; 39 40union ccb_result { 41 struct ccb_exec_result exec; 42 struct ccb_info_result info; 43 struct ccb_kill_result kill; 44}; 45 46#define DAX_MMAP_LEN (16 * 1024) 47#define DAX_MAX_CCBS 15 48#define DAX_CCB_BUF_MAXLEN (DAX_MAX_CCBS * 64) 49#define DAX_NAME "oradax" 50 51/* CCB_EXEC status */ 52#define DAX_SUBMIT_OK 0 53#define DAX_SUBMIT_ERR_RETRY 1 54#define DAX_SUBMIT_ERR_WOULDBLOCK 2 55#define DAX_SUBMIT_ERR_BUSY 3 56#define DAX_SUBMIT_ERR_THR_INIT 4 57#define DAX_SUBMIT_ERR_ARG_INVAL 5 58#define DAX_SUBMIT_ERR_CCB_INVAL 6 59#define DAX_SUBMIT_ERR_NO_CA_AVAIL 7 60#define DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS 8 61#define DAX_SUBMIT_ERR_NOMAP 9 62#define DAX_SUBMIT_ERR_NOACCESS 10 63#define DAX_SUBMIT_ERR_TOOMANY 11 64#define DAX_SUBMIT_ERR_UNAVAIL 12 65#define DAX_SUBMIT_ERR_INTERNAL 13 66 67/* CCB_INFO states - must match HV_CCB_STATE_* definitions */ 68#define DAX_CCB_COMPLETED 0 69#define DAX_CCB_ENQUEUED 1 70#define DAX_CCB_INPROGRESS 2 71#define DAX_CCB_NOTFOUND 3 72 73/* CCB_KILL actions - must match HV_CCB_KILL_* definitions */ 74#define DAX_KILL_COMPLETED 0 75#define DAX_KILL_DEQUEUED 1 76#define DAX_KILL_KILLED 2 77#define DAX_KILL_NOTFOUND 3 78 79#endif /* _ORADAX_H */ 80