| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * scsi_obsolete.h Copyright (C) 1997 Eric Youngdale |
| 3 | * |
| 4 | */ |
| 5 | |
| 6 | #ifndef _SCSI_OBSOLETE_H |
| 7 | #define _SCSI_OBSOLETE_H |
| 8 | |
| 9 | /* |
| 10 | * These are the return codes for the abort and reset functions. The mid-level |
| 11 | * code uses these to decide what to do next. Each of the low level abort |
| 12 | * and reset functions must correctly indicate what it has done. |
| 13 | * The descriptions are written from the point of view of the mid-level code, |
| 14 | * so that the return code is telling the mid-level drivers exactly what |
| 15 | * the low level driver has already done, and what remains to be done. |
| 16 | */ |
| 17 | |
| 18 | /* We did not do anything. |
| 19 | * Wait some more for this command to complete, and if this does not work, |
| 20 | * try something more serious. */ |
| 21 | #define SCSI_ABORT_SNOOZE 0 |
| 22 | |
| 23 | /* This means that we were able to abort the command. We have already |
| 24 | * called the mid-level done function, and do not expect an interrupt that |
| 25 | * will lead to another call to the mid-level done function for this command */ |
| 26 | #define SCSI_ABORT_SUCCESS 1 |
| 27 | |
| 28 | /* We called for an abort of this command, and we should get an interrupt |
| 29 | * when this succeeds. Thus we should not restore the timer for this |
| 30 | * command in the mid-level abort function. */ |
| 31 | #define SCSI_ABORT_PENDING 2 |
| 32 | |
| 33 | /* Unable to abort - command is currently on the bus. Grin and bear it. */ |
| 34 | #define SCSI_ABORT_BUSY 3 |
| 35 | |
| 36 | /* The command is not active in the low level code. Command probably |
| 37 | * finished. */ |
| 38 | #define SCSI_ABORT_NOT_RUNNING 4 |
| 39 | |
| 40 | /* Something went wrong. The low level driver will indicate the correct |
| 41 | * error condition when it calls scsi_done, so the mid-level abort function |
| 42 | * can simply wait until this comes through */ |
| 43 | #define SCSI_ABORT_ERROR 5 |
| 44 | |
| 45 | /* We do not know how to reset the bus, or we do not want to. Bummer. |
| 46 | * Anyway, just wait a little more for the command in question, and hope that |
| 47 | * it eventually finishes. If it never finishes, the SCSI device could |
| 48 | * hang, so use this with caution. */ |
| 49 | #define SCSI_RESET_SNOOZE 0 |
| 50 | |
| 51 | /* We do not know how to reset the bus, or we do not want to. Bummer. |
| 52 | * We have given up on this ever completing. The mid-level code will |
| 53 | * request sense information to decide how to proceed from here. */ |
| 54 | #define SCSI_RESET_PUNT 1 |
| 55 | |
| 56 | /* This means that we were able to reset the bus. We have restarted all of |
| 57 | * the commands that should be restarted, and we should be able to continue |
| 58 | * on normally from here. We do not expect any interrupts that will return |
| 59 | * DID_RESET to any of the other commands in the host_queue, and the mid-level |
| 60 | * code does not need to do anything special to keep the commands alive. |
| 61 | * If a hard reset was performed then all outstanding commands on the |
| 62 | * bus have been restarted. */ |
| 63 | #define SCSI_RESET_SUCCESS 2 |
| 64 | |
| 65 | /* We called for a reset of this bus, and we should get an interrupt |
| 66 | * when this succeeds. Each command should get its own status |
| 67 | * passed up to scsi_done, but this has not happened yet. |
| 68 | * If a hard reset was performed, then we expect an interrupt |
| 69 | * for *each* of the outstanding commands that will have the |
| 70 | * effect of restarting the commands. |
| 71 | */ |
| 72 | #define SCSI_RESET_PENDING 3 |
| 73 | |
| 74 | /* We did a reset, but do not expect an interrupt to signal DID_RESET. |
| 75 | * This tells the upper level code to request the sense info, and this |
| 76 | * should keep the command alive. */ |
| 77 | #define SCSI_RESET_WAKEUP 4 |
| 78 | |
| 79 | /* The command is not active in the low level code. Command probably |
| 80 | finished. */ |
| 81 | #define SCSI_RESET_NOT_RUNNING 5 |
| 82 | |
| 83 | /* Something went wrong, and we do not know how to fix it. */ |
| 84 | #define SCSI_RESET_ERROR 6 |
| 85 | |
| 86 | #define SCSI_RESET_SYNCHRONOUS 0x01 |
| 87 | #define SCSI_RESET_ASYNCHRONOUS 0x02 |
| 88 | #define SCSI_RESET_SUGGEST_BUS_RESET 0x04 |
| 89 | #define SCSI_RESET_SUGGEST_HOST_RESET 0x08 |
| 90 | /* |
| 91 | * This is a bitmask that is ored with one of the above codes. |
| 92 | * It tells the mid-level code that we did a hard reset. |
| 93 | */ |
| 94 | #define SCSI_RESET_BUS_RESET 0x100 |
| 95 | /* |
| 96 | * This is a bitmask that is ored with one of the above codes. |
| 97 | * It tells the mid-level code that we did a host adapter reset. |
| 98 | */ |
| 99 | #define SCSI_RESET_HOST_RESET 0x200 |
| 100 | /* |
| 101 | * Used to mask off bits and to obtain the basic action that was |
| 102 | * performed. |
| 103 | */ |
| 104 | #define SCSI_RESET_ACTION 0xff |
| 105 | |
| 106 | #endif /* SCSI_OBSOLETE_H */ |