LXR linux/arch/sparc/include/uapi/asm/oradax.h

   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
  31struct dax_command {
  32        __u16 command;          /* CCB_KILL/INFO/DEQUEUE */
  33        __u16 ca_offset;        /* offset into mmapped completion area */
  34};
  35
  36struct ccb_kill_result {
  37        __u16 action;           /* action taken to kill ccb */
  38};
  39
  40struct 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
  47struct ccb_exec_result {
  48        __u64   status_data;    /* additional status data (e.g. bad VA) */
  49        __u32   status;         /* one of DAX_SUBMIT_* */
  50};
  51
  52union 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