1 .\" $FreeBSD: src/share/man/man4/ciss.4,v 1.2.2.3 2003/03/03 18:51:16 trhodes Exp $
2 .\" $DragonFly: src/share/man/man4/ciss.4,v 1.2 2003/06/17 04:36:58 dillon Exp $
3 .\" Written by Tom Rhodes
4 .\" This file is in the public domain.
11 .Nd Common Interface for SCSI-3 Support driver
18 driver claims to provide a common interface between generic SCSI
19 transports and intelligent host adapters.
25 as defined in the document entitled
26 .%T "CISS Command Interface for SCSI-3 Support Open Specification, Version 1.04, Valence Number 1" ,
27 dated 2000/11/27, produced by Compaq Computer Corporation.
29 We provide a shim layer between the
33 offloading most of the queueing and being-a-disk chores onto CAM.
34 Entry to the driver is via the PCI bus attachment
37 etc. and via the CAM interface
43 adapters require faked responses to get reasonable
47 command set is by no means adequate to support the functionality
49 and thus the supported Compaq adapters utilize portions of the
50 control protocol from earlier Compaq adapter families.
56 transport layer over PCI.
57 This interface (ab)uses the I2O register set (specifically the post
58 queues) to exchange commands with the adapter.
59 Other interfaces are available, but we are not supposed to know about them,
60 and it is dubious whether they would provide major performance improvements
61 except under extreme load.
63 Non-disk devices (such as internal DATs and devices
64 attached to the external SCSI bus) are not yet supported.
66 Supported controllers include:
70 Compaq Smart Array 5300
72 Compaq Smart Array 532
82 .%T "CISS Command Interface for SCSI-3 Support Open Specification, Version 1.04, Valence Number 1"
84 .%Q "Compaq Computer Corporation"
91 .An Mike Smith Aq msmith@FreeBSD.org .
93 This manual page is based on his comments and was written by
94 .An Tom Rhodes Aq trhodes@FreeBSD.org .