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 19 struct dax_command { 20 __u16 command; /* CCB_KILL/INFO/DEQUEUE */ 21 __u16 ca_offset; /* offset into mmapped completion area */ 22 }; 23 24 struct ccb_kill_result { 25 __u16 action; /* action taken to kill ccb */ 26 }; 27 28 struct 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 35 struct ccb_exec_result { 36 __u64 status_data; /* additional status data (e.g. bad VA) */ 37 __u32 status; /* one of DAX_SUBMIT_* */ 38 }; 39 40 union 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