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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
*/
/*
* Oracle DAX driver API definitions
*/
#ifndef _ORADAX_H
#define _ORADAX_H
#include <linux/types.h>
#define CCB_KILL 0
#define CCB_INFO 1
#define CCB_DEQUEUE 2
struct dax_command {
__u16 command; /* CCB_KILL/INFO/DEQUEUE */
__u16 ca_offset; /* offset into mmapped completion area */
};
struct ccb_kill_result {
__u16 action; /* action taken to kill ccb */
};
struct ccb_info_result {
__u16 state; /* state of enqueued ccb */
__u16 inst_num; /* dax instance number of enqueued ccb */
__u16 q_num; /* queue number of enqueued ccb */
__u16 q_pos; /* ccb position in queue */
};
struct ccb_exec_result {
__u64 status_data; /* additional status data (e.g. bad VA) */
__u32 status; /* one of DAX_SUBMIT_* */
};
union ccb_result {
struct ccb_exec_result exec;
struct ccb_info_result info;
struct ccb_kill_result kill;
};
#define DAX_MMAP_LEN (16 * 1024)
#define DAX_MAX_CCBS 15
#define DAX_CCB_BUF_MAXLEN (DAX_MAX_CCBS * 64)
#define DAX_NAME "oradax"
/* CCB_EXEC status */
#define DAX_SUBMIT_OK 0
#define DAX_SUBMIT_ERR_RETRY 1
#define DAX_SUBMIT_ERR_WOULDBLOCK 2
#define DAX_SUBMIT_ERR_BUSY 3
#define DAX_SUBMIT_ERR_THR_INIT 4
#define DAX_SUBMIT_ERR_ARG_INVAL 5
#define DAX_SUBMIT_ERR_CCB_INVAL 6
#define DAX_SUBMIT_ERR_NO_CA_AVAIL 7
#define DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS 8
#define DAX_SUBMIT_ERR_NOMAP 9
#define DAX_SUBMIT_ERR_NOACCESS 10
#define DAX_SUBMIT_ERR_TOOMANY 11
#define DAX_SUBMIT_ERR_UNAVAIL 12
#define DAX_SUBMIT_ERR_INTERNAL 13
/* CCB_INFO states - must match HV_CCB_STATE_* definitions */
#define DAX_CCB_COMPLETED 0
#define DAX_CCB_ENQUEUED 1
#define DAX_CCB_INPROGRESS 2
#define DAX_CCB_NOTFOUND 3
/* CCB_KILL actions - must match HV_CCB_KILL_* definitions */
#define DAX_KILL_COMPLETED 0
#define DAX_KILL_DEQUEUED 1
#define DAX_KILL_KILLED 2
#define DAX_KILL_NOTFOUND 3
#endif /* _ORADAX_H */
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