2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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.
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.
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/>.
19 * Oracle DAX driver API definitions
25 #include <linux/types.h>
32 __u16 command; /* CCB_KILL/INFO/DEQUEUE */
33 __u16 ca_offset; /* offset into mmapped completion area */
36 struct ccb_kill_result {
37 __u16 action; /* action taken to kill ccb */
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 */
47 struct ccb_exec_result {
48 __u64 status_data; /* additional status data (e.g. bad VA) */
49 __u32 status; /* one of DAX_SUBMIT_* */
53 struct ccb_exec_result exec;
54 struct ccb_info_result info;
55 struct ccb_kill_result kill;
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"
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
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
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
91 #endif /* _ORADAX_H */