1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 /* 19 * Oracle DAX driver API definitions 20 */ 21 22 #ifndef _ORADAX_H 23 #define _ORADAX_H 24 25 #include <linux/types.h> 26 27 #define CCB_KILL 0 28 #define CCB_INFO 1 29 #define CCB_DEQUEUE 2 30 31 struct dax_command { 32 __u16 command; /* CCB_KILL/INFO/DEQUEUE */ 33 __u16 ca_offset; /* offset into mmapped completion area */ 34 }; 35 36 struct ccb_kill_result { 37 __u16 action; /* action taken to kill ccb */ 38 }; 39 40 struct ccb_info_result { 41 __u16 state; /* state of enqueued ccb */ 42 __u16 inst_num; /* dax instance number of enqueued ccb */ 43 __u16 q_num; /* queue number of enqueued ccb */ 44 __u16 q_pos; /* ccb position in queue */ 45 }; 46 47 struct ccb_exec_result { 48 __u64 status_data; /* additional status data (e.g. bad VA) */ 49 __u32 status; /* one of DAX_SUBMIT_* */ 50 }; 51 52 union ccb_result { 53 struct ccb_exec_result exec; 54 struct ccb_info_result info; 55 struct ccb_kill_result kill; 56 }; 57 58 #define DAX_MMAP_LEN (16 * 1024) 59 #define DAX_MAX_CCBS 15 60 #define DAX_CCB_BUF_MAXLEN (DAX_MAX_CCBS * 64) 61 #define DAX_NAME "oradax" 62 63 /* CCB_EXEC status */ 64 #define DAX_SUBMIT_OK 0 65 #define DAX_SUBMIT_ERR_RETRY 1 66 #define DAX_SUBMIT_ERR_WOULDBLOCK 2 67 #define DAX_SUBMIT_ERR_BUSY 3 68 #define DAX_SUBMIT_ERR_THR_INIT 4 69 #define DAX_SUBMIT_ERR_ARG_INVAL 5 70 #define DAX_SUBMIT_ERR_CCB_INVAL 6 71 #define DAX_SUBMIT_ERR_NO_CA_AVAIL 7 72 #define DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS 8 73 #define DAX_SUBMIT_ERR_NOMAP 9 74 #define DAX_SUBMIT_ERR_NOACCESS 10 75 #define DAX_SUBMIT_ERR_TOOMANY 11 76 #define DAX_SUBMIT_ERR_UNAVAIL 12 77 #define DAX_SUBMIT_ERR_INTERNAL 13 78 79 /* CCB_INFO states - must match HV_CCB_STATE_* definitions */ 80 #define DAX_CCB_COMPLETED 0 81 #define DAX_CCB_ENQUEUED 1 82 #define DAX_CCB_INPROGRESS 2 83 #define DAX_CCB_NOTFOUND 3 84 85 /* CCB_KILL actions - must match HV_CCB_KILL_* definitions */ 86 #define DAX_KILL_COMPLETED 0 87 #define DAX_KILL_DEQUEUED 1 88 #define DAX_KILL_KILLED 2 89 #define DAX_KILL_NOTFOUND 3 90 91 #endif /* _ORADAX_H */ 92