1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun /* 7*4882a593Smuzhiyun * Oracle DAX driver API definitions 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef _ORADAX_H 11*4882a593Smuzhiyun #define _ORADAX_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <linux/types.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define CCB_KILL 0 16*4882a593Smuzhiyun #define CCB_INFO 1 17*4882a593Smuzhiyun #define CCB_DEQUEUE 2 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun struct dax_command { 20*4882a593Smuzhiyun __u16 command; /* CCB_KILL/INFO/DEQUEUE */ 21*4882a593Smuzhiyun __u16 ca_offset; /* offset into mmapped completion area */ 22*4882a593Smuzhiyun }; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct ccb_kill_result { 25*4882a593Smuzhiyun __u16 action; /* action taken to kill ccb */ 26*4882a593Smuzhiyun }; 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun struct ccb_info_result { 29*4882a593Smuzhiyun __u16 state; /* state of enqueued ccb */ 30*4882a593Smuzhiyun __u16 inst_num; /* dax instance number of enqueued ccb */ 31*4882a593Smuzhiyun __u16 q_num; /* queue number of enqueued ccb */ 32*4882a593Smuzhiyun __u16 q_pos; /* ccb position in queue */ 33*4882a593Smuzhiyun }; 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun struct ccb_exec_result { 36*4882a593Smuzhiyun __u64 status_data; /* additional status data (e.g. bad VA) */ 37*4882a593Smuzhiyun __u32 status; /* one of DAX_SUBMIT_* */ 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun union ccb_result { 41*4882a593Smuzhiyun struct ccb_exec_result exec; 42*4882a593Smuzhiyun struct ccb_info_result info; 43*4882a593Smuzhiyun struct ccb_kill_result kill; 44*4882a593Smuzhiyun }; 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #define DAX_MMAP_LEN (16 * 1024) 47*4882a593Smuzhiyun #define DAX_MAX_CCBS 15 48*4882a593Smuzhiyun #define DAX_CCB_BUF_MAXLEN (DAX_MAX_CCBS * 64) 49*4882a593Smuzhiyun #define DAX_NAME "oradax" 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun /* CCB_EXEC status */ 52*4882a593Smuzhiyun #define DAX_SUBMIT_OK 0 53*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_RETRY 1 54*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_WOULDBLOCK 2 55*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_BUSY 3 56*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_THR_INIT 4 57*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_ARG_INVAL 5 58*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_CCB_INVAL 6 59*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_NO_CA_AVAIL 7 60*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS 8 61*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_NOMAP 9 62*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_NOACCESS 10 63*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_TOOMANY 11 64*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_UNAVAIL 12 65*4882a593Smuzhiyun #define DAX_SUBMIT_ERR_INTERNAL 13 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun /* CCB_INFO states - must match HV_CCB_STATE_* definitions */ 68*4882a593Smuzhiyun #define DAX_CCB_COMPLETED 0 69*4882a593Smuzhiyun #define DAX_CCB_ENQUEUED 1 70*4882a593Smuzhiyun #define DAX_CCB_INPROGRESS 2 71*4882a593Smuzhiyun #define DAX_CCB_NOTFOUND 3 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun /* CCB_KILL actions - must match HV_CCB_KILL_* definitions */ 74*4882a593Smuzhiyun #define DAX_KILL_COMPLETED 0 75*4882a593Smuzhiyun #define DAX_KILL_DEQUEUED 1 76*4882a593Smuzhiyun #define DAX_KILL_KILLED 2 77*4882a593Smuzhiyun #define DAX_KILL_NOTFOUND 3 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #endif /* _ORADAX_H */ 80