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