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We now pay attention to the maxio field in the XPT_PATH_INQ CCB, and if it is set, propagate it up to physio via the si_iosize_max field in the cdev structure. We also now pay attention to the PIM_UNMAPPED capability bit in the XPT_PATH_INQ CCB, and set the new SI_UNMAPPED cdev flag when the underlying SIM supports unmapped I/O. scsi_sa.c: Add unmapped I/O support and propagate the SIM's maximum I/O size up. Adjust scsi_tape_read_write() in the same way that scsi_read_write() was changed to support unmapped I/O. We overload the readop parameter with bits that tell us whether it's an unmapped I/O, and we need to set the CAM_DATA_BIO CCB flag. This change should be backwards compatible in source and binary forms. MFC after: 1 week Sponsored by: Spectra Logic
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