/drivers/scsi/scsi_obsolete.h

https://bitbucket.org/abioy/linux · C Header · 106 lines · 23 code · 17 blank · 66 comment · 0 complexity · 76a2a47b41aade806026227bed552dbe MD5 · raw file 

    

  1. /*
    2. 

  2.  *  scsi_obsolete.h Copyright (C) 1997 Eric Youngdale
    3. 

  3.  *
    4. 

  4.  */
    5. 

  5. 

  6. #ifndef _SCSI_OBSOLETE_H
    7. 

  7. #define _SCSI_OBSOLETE_H
    8. 

  8. 

  9. /*
    10. 

  10.  * These are the return codes for the abort and reset functions.  The mid-level
    11. 

  11.  * code uses these to decide what to do next.  Each of the low level abort
    12. 

  12.  * and reset functions must correctly indicate what it has done.
    13. 

  13.  * The descriptions are written from the point of view of the mid-level code,
    14. 

  14.  * so that the return code is telling the mid-level drivers exactly what
    15. 

  15.  * the low level driver has already done, and what remains to be done.
    16. 

  16.  */
    17. 

  17. 

  18. /* We did not do anything.  
    19. 

  19.  * Wait some more for this command to complete, and if this does not work, 
    20. 

  20.  * try something more serious. */
    21. 

  21. #define SCSI_ABORT_SNOOZE 0
    22. 

  22. 

  23. /* This means that we were able to abort the command.  We have already
    24. 

  24.  * called the mid-level done function, and do not expect an interrupt that 
    25. 

  25.  * will lead to another call to the mid-level done function for this command */
    26. 

  26. #define SCSI_ABORT_SUCCESS 1
    27. 

  27. 

  28. /* We called for an abort of this command, and we should get an interrupt 
    29. 

  29.  * when this succeeds.  Thus we should not restore the timer for this
    30. 

  30.  * command in the mid-level abort function. */
    31. 

  31. #define SCSI_ABORT_PENDING 2
    32. 

  32. 

  33. /* Unable to abort - command is currently on the bus.  Grin and bear it. */
    34. 

  34. #define SCSI_ABORT_BUSY 3
    35. 

  35. 

  36. /* The command is not active in the low level code. Command probably
    37. 

  37.  * finished. */
    38. 

  38. #define SCSI_ABORT_NOT_RUNNING 4
    39. 

  39. 

  40. /* Something went wrong.  The low level driver will indicate the correct
    41. 

  41.  * error condition when it calls scsi_done, so the mid-level abort function
    42. 

  42.  * can simply wait until this comes through */
    43. 

  43. #define SCSI_ABORT_ERROR 5
    44. 

  44. 

  45. /* We do not know how to reset the bus, or we do not want to.  Bummer.
    46. 

  46.  * Anyway, just wait a little more for the command in question, and hope that
    47. 

  47.  * it eventually finishes.  If it never finishes, the SCSI device could
    48. 

  48.  * hang, so use this with caution. */
    49. 

  49. #define SCSI_RESET_SNOOZE 0
    50. 

  50. 

  51. /* We do not know how to reset the bus, or we do not want to.  Bummer.
    52. 

  52.  * We have given up on this ever completing.  The mid-level code will
    53. 

  53.  * request sense information to decide how to proceed from here. */
    54. 

  54. #define SCSI_RESET_PUNT 1
    55. 

  55. 

  56. /* This means that we were able to reset the bus.  We have restarted all of
    57. 

  57.  * the commands that should be restarted, and we should be able to continue
    58. 

  58.  * on normally from here.  We do not expect any interrupts that will return
    59. 

  59.  * DID_RESET to any of the other commands in the host_queue, and the mid-level
    60. 

  60.  * code does not need to do anything special to keep the commands alive. 
    61. 

  61.  * If a hard reset was performed then all outstanding commands on the
    62. 

  62.  * bus have been restarted. */
    63. 

  63. #define SCSI_RESET_SUCCESS 2
    64. 

  64. 

  65. /* We called for a reset of this bus, and we should get an interrupt 
    66. 

  66.  * when this succeeds.  Each command should get its own status
    67. 

  67.  * passed up to scsi_done, but this has not happened yet. 
    68. 

  68.  * If a hard reset was performed, then we expect an interrupt
    69. 

  69.  * for *each* of the outstanding commands that will have the
    70. 

  70.  * effect of restarting the commands.
    71. 

  71.  */
    72. 

  72. #define SCSI_RESET_PENDING 3
    73. 

  73. 

  74. /* We did a reset, but do not expect an interrupt to signal DID_RESET.
    75. 

  75.  * This tells the upper level code to request the sense info, and this
    76. 

  76.  * should keep the command alive. */
    77. 

  77. #define SCSI_RESET_WAKEUP 4
    78. 

  78. 

  79. /* The command is not active in the low level code. Command probably
    80. 

  80.    finished. */
    81. 

  81. #define SCSI_RESET_NOT_RUNNING 5
    82. 

  82. 

  83. /* Something went wrong, and we do not know how to fix it. */
    84. 

  84. #define SCSI_RESET_ERROR 6
    85. 

  85. 

  86. #define SCSI_RESET_SYNCHRONOUS		0x01
    87. 

  87. #define SCSI_RESET_ASYNCHRONOUS		0x02
    88. 

  88. #define SCSI_RESET_SUGGEST_BUS_RESET	0x04
    89. 

  89. #define SCSI_RESET_SUGGEST_HOST_RESET	0x08
    90. 

  90. /*
    91. 

  91.  * This is a bitmask that is ored with one of the above codes.
    92. 

  92.  * It tells the mid-level code that we did a hard reset.
    93. 

  93.  */
    94. 

  94. #define SCSI_RESET_BUS_RESET 0x100
    95. 

  95. /*
    96. 

  96.  * This is a bitmask that is ored with one of the above codes.
    97. 

  97.  * It tells the mid-level code that we did a host adapter reset.
    98. 

  98.  */
    99. 

  99. #define SCSI_RESET_HOST_RESET 0x200
    100. 

  100. /*
    101. 

  101.  * Used to mask off bits and to obtain the basic action that was
    102. 

  102.  * performed.  
    103. 

  103.  */
    104. 

  104. #define SCSI_RESET_ACTION   0xff
    105. 

  105. 

  106. #endif				/* SCSI_OBSOLETE_H */
    107.