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1275 |
phoenix |
/*
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* scsi_obsolete.h Copyright (C) 1997 Eric Youngdale
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*
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*/
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#ifndef _SCSI_OBSOLETE_H
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#define _SCSI_OBSOLETE_H
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/*
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* These are the return codes for the abort and reset functions. The mid-level
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* code uses these to decide what to do next. Each of the low level abort
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* and reset functions must correctly indicate what it has done.
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* The descriptions are written from the point of view of the mid-level code,
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* so that the return code is telling the mid-level drivers exactly what
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* the low level driver has already done, and what remains to be done.
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*/
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/* We did not do anything.
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* Wait some more for this command to complete, and if this does not work,
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* try something more serious. */
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#define SCSI_ABORT_SNOOZE 0
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/* This means that we were able to abort the command. We have already
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* called the mid-level done function, and do not expect an interrupt that
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* will lead to another call to the mid-level done function for this command */
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#define SCSI_ABORT_SUCCESS 1
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/* We called for an abort of this command, and we should get an interrupt
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* when this succeeds. Thus we should not restore the timer for this
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* command in the mid-level abort function. */
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#define SCSI_ABORT_PENDING 2
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/* Unable to abort - command is currently on the bus. Grin and bear it. */
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#define SCSI_ABORT_BUSY 3
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/* The command is not active in the low level code. Command probably
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* finished. */
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#define SCSI_ABORT_NOT_RUNNING 4
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/* Something went wrong. The low level driver will indicate the correct
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* error condition when it calls scsi_done, so the mid-level abort function
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* can simply wait until this comes through */
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#define SCSI_ABORT_ERROR 5
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/* We do not know how to reset the bus, or we do not want to. Bummer.
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* Anyway, just wait a little more for the command in question, and hope that
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* it eventually finishes. If it never finishes, the SCSI device could
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* hang, so use this with caution. */
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#define SCSI_RESET_SNOOZE 0
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/* We do not know how to reset the bus, or we do not want to. Bummer.
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* We have given up on this ever completing. The mid-level code will
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* request sense information to decide how to proceed from here. */
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#define SCSI_RESET_PUNT 1
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/* This means that we were able to reset the bus. We have restarted all of
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* the commands that should be restarted, and we should be able to continue
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* on normally from here. We do not expect any interrupts that will return
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* DID_RESET to any of the other commands in the host_queue, and the mid-level
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* code does not need to do anything special to keep the commands alive.
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* If a hard reset was performed then all outstanding commands on the
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* bus have been restarted. */
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#define SCSI_RESET_SUCCESS 2
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/* We called for a reset of this bus, and we should get an interrupt
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* when this succeeds. Each command should get its own status
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* passed up to scsi_done, but this has not happened yet.
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* If a hard reset was performed, then we expect an interrupt
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* for *each* of the outstanding commands that will have the
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* effect of restarting the commands.
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*/
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#define SCSI_RESET_PENDING 3
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/* We did a reset, but do not expect an interrupt to signal DID_RESET.
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* This tells the upper level code to request the sense info, and this
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* should keep the command alive. */
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#define SCSI_RESET_WAKEUP 4
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/* The command is not active in the low level code. Command probably
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finished. */
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#define SCSI_RESET_NOT_RUNNING 5
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/* Something went wrong, and we do not know how to fix it. */
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#define SCSI_RESET_ERROR 6
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#define SCSI_RESET_SYNCHRONOUS 0x01
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#define SCSI_RESET_ASYNCHRONOUS 0x02
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#define SCSI_RESET_SUGGEST_BUS_RESET 0x04
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#define SCSI_RESET_SUGGEST_HOST_RESET 0x08
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/*
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* This is a bitmask that is ored with one of the above codes.
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* It tells the mid-level code that we did a hard reset.
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*/
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#define SCSI_RESET_BUS_RESET 0x100
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/*
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* This is a bitmask that is ored with one of the above codes.
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* It tells the mid-level code that we did a host adapter reset.
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*/
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#define SCSI_RESET_HOST_RESET 0x200
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/*
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* Used to mask off bits and to obtain the basic action that was
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* performed.
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*/
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#define SCSI_RESET_ACTION 0xff
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#endif /* SCSI_OBSOLETE_H */
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