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79 lines
2.0 KiB
79 lines
2.0 KiB
/* 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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