MPTSCSIH_HOST_RESET(9) Message-based devices MPTSCSIH_HOST_RESET(9)NAME
mptscsih_host_reset - Perform a SCSI host adapter RESET (new_eh variant)
int mptscsih_host_reset(struct scsi_cmnd * SCpnt);
Pointer to scsi_cmnd structure, IO which reset is due to
(linux scsi_host_template.eh_host_reset_handler routine)
Returns SUCCESS or FAILED.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 MPTSCSIH_HOST_RESET(9)
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scsi_reset(9F) Kernel Functions for Drivers scsi_reset(9F)NAME
scsi_reset - reset a SCSI bus or target
int scsi_reset(struct scsi_address *ap, int level);
Solaris DDI specific (Solaris DDI).
ap Pointer to the scsi_address structure.
level The level of reset required.
scsi_reset() asks the host adapter driver to reset the SCSI bus or a SCSI target as specified by level. If level equals RESET_ALL, the SCSI
bus is reset. If it equals RESET_TARGET, ap is used to determine the target to be reset. If it equals RESET_LUN, ap is used to determine
the logical unit to be reset.
When given the RESET_LUN level, scsi_reset() can return failure if the LOGICAL UNIT RESET message is not supported by the target device, or
if the underlying HBA driver does not implement the ability to issue a LOGICAL UNIT RESET message.
Note that, at the point when scsi_reset() resets the logical unit (case RESET_LUN), or the target (case RESET_TARGET), or the bus (case
RESET_ALL), there might be one or more command packets outstanding. That is, packets have been passed to scsi_transport(), and queued or
possibly transported, but the commands have not been completed and the target completion routine has not been called for those packets.
The successful call to scsi_reset() has the side effect that any such commands currently outstanding are aborted, at which point the pack-
ets are marked with pkt_reason set to CMD_RESET, and the appropriate bit -- either STAT_BUS_RESET or STAT_DEV_RESET -- is set in pkt_sta-
tistics. Once thus appropriately marked, the aborted command packets are passed to the target driver command completion routine.
Also note that, at the moment that a thread executing scsi_reset() actually resets the target or the bus, it is possible that a second
thread may have already called scsi_transport(), but not yet queued or transported its command. In this case the HBA will not yet have
received the second thread's packet and this packet will not be aborted.
1 Upon success.
0 Upon failure.
scsi_reset() can be called from user or interrupt context.
SEE ALSO tran_reset(9E), tran_reset_notify(9E), scsi_abort(9F)
Writing Device Drivers
SunOS 5.10 12 Jul 2002 scsi_reset(9F)
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