I am sponsoring the following fasttrack for myself. Micro/patch
binding is requested. The proposal is a backwards compatible update
scsi_inquiry(9S) data structures and man pages to support more recient
versions SCSI standards. I believe the case qualifies for self review,
and have filed it as Closed Approved Automatic. If there is a request,
I'd be happy to convert it to a fasttrack and set the timer to enable
further discussion.
-Chris
1. Introduction
1.1 Project/Component Working Name:
scsi_inquiry(9S) update
1.2 Name of Document Author/Supplier:
Author: Chris Horne
1.3 Date of This Document:
Thu Oct 23 2008
4. Technical Description
4.1 Summary
This fasttrack proposes updates to the scsi_inquiry(9S) structure
consistent with the evolution of SCSI standards.
4.2 Interfaces
4.2.1 Removed from man page:
The following bits were specified in earlier versions of the
ANSI standard, but generally unused - they have been removed
from more recent versions of the ANSI standard. The proposal
is to remove these fields from the scsi_inquiry(9S) man page,
the definition in the header file will still be there (marked
deprecated).
------------------------------------------------------------------
Interface Name Comm.Lev. Comments
------------------------------------------------------------------
inq_reladdr Obsolete Supports relative addressing
inq_wbus32 " Supports 32 bit wide data xfers
4.2.2 New (already defined in header file):
These definitions update the scsi_inquiry(9S) man page to
reflect definitions that already exist in the header file.
------------------------------------------------------------------
Interface Name Comm.Lev. Comments
------------------------------------------------------------------
DTYPE_RBC Committed Simplified direct-access device
DTYPE_OCRW " Optical card reader/writer device.
DTYPE_BRIDGE " Bridge
DTYPE_OSD " Object-based storage device.
DPQ_MASK " Mask Peripheral Qualifier field.
4.2.3 NEW (Add to man page and header file):
New fields in latest version of ANSI standard added to the man
page and to the header file.
------------------------------------------------------------------
Interface Name Comm.Lev. Comments
------------------------------------------------------------------
inq_normaca Committed setting NACA bit supported
inq_hisup " hierarchical addressing model
inq_sccs " embedded storage array
inq_tpgse " explicit asymmetric lun access
inq_tpgsi " implicit asymmetric lun access
inq_bque " basic queuing
inq_encserv " embedded enclosure services
inq_dualp " dual port device
inq_mchngr " embedded/attached to medium chngr
inq_addr16 " SPI: supports 16 bit wide SCSI addr
inq_clk " SPI3 clocking
inq_qas " SPI3: quick arb sel
inq_ius " SPI3: information units
4.2.4 New (Add to the header file, no man page definition):
New fields in latest version of ANSI standard added to the
header file, but not being promoted to the man page at this
time because of stability concerns.
------------------------------------------------------------------
Interface Name Comm.Lev. Comments
------------------------------------------------------------------
inq_acc Unstable access controls coordinator
inq_3pc " third-party copy
inq_protect " supports protection information
4.2.5 Bugs fixed in current man page:
The definition of the following fields are corrected: inq_ecma,
inq_ansi.
The man page is reorganized for consistent presentation of
field definitions, using ANSI standard and structure layout
order.
4.2.6 Other changes
In addition to the changes above, the following inquiry related
implementation changes are being made:
o The size of the scsi_inquiry(9S) structure is padded to 132
bytes. This is being done so that the sd_inq will contain
vendor unique information needed for some of the mpxio
failover modules. The scsi_inquiry(9S) structure is not
embedded in other structures, or used in kernel/user APIs -
so this change should be safe.
o The scsi_device(9S) 'sd_inq' information will now be scoped
the same as the scsi_device(9S) structure itself (i.e.
initchild - uninitchild), instead of by scsi_probe(9F) -
scsi_unprobe(9F) (or scsi_slave(9F) - scsi_unslave(9F)).
This change makes 'sd_inq' match the scope of a devinfo
node's inquiry(9P) properties. By coupling 'sd_inq' more
closely with the devinfo state model, we reduce bugs related
to a failed detach operations (making HBA driver and SCSA
framework use of 'sd_inq' safer). This change makes the SCSA
framework implementation of scsi_unprobe(9F) and
scsi_unslave(9F) noops.
4.3 Man page changes
See below.
6. Resources and Schedule
6.4 Steering Committee requested information
6.4.1 Consolidation C-team Name:
ON
6.5 ARC review type:
FastTrack
A.1 Proposed scsi_inquiry(9F) man page changes:
--- scsi_inquiry.9s.orig Thu Jul 21 21:02:18 2005
+++ scsi_inquiry.9s Tue Aug 2 16:00:49 2005
@@ -1,3 +1,6 @@
+NOTE: Lines that start with 'X' will be deleted before submission,
+ they are being classified as unstable at this time.
+
Data Structures for Drivers scsi_inquiry(9S)
NAME
@@ -21,15 +24,27 @@
uchar_t inq_rmb :1; /* Removable media */
uchar_t inq_qual :7; /* Device type qualifier */
uchar_t inq_iso :2; /* ISO version */
- uchar_t inq_ecma :3; /* ANSI version */
+ uchar_t inq_ecma :3; /* ECMA version */
+ uchar_t inq_ansi :3; /* ANSII version */
uchar_t inq_aenc :1; /* Async event notification cap. */
uchar_t inq_trmiop :1; /* Supports TERMINATE I/O PROC msg */
+ uchar_t inq_normaca :1; /* setting NACA bit supported */
+ uchar_t inq_hisup :1; /* hierarchical addressing model */
uchar_t inq_rdf :4; /* Response data format */
- uchar_t inq_len; /* Additional length */
- uchar_t inq_reladdr :1; /* Supports relative addressing */
- uchar_t inq_wbus32 :1; /* Supports 32 bit wide data xfers */
- uchar_t inq_wbus16 :1; /* Supports 16 bit wide data xfers */
- uchar_t inq_sync :1; /* Supports synchronous data xfers */
+ uchar_t inq_len /* Additional length */
+ uchar_t inq_sccs :1; /* embedded storage array */
+X uchar_t inq_acc :1; /* access controls coordinator */
+ uchar_t inq_tpgse :1; /* explicit asymmetric lun access */
+ uchar_t inq_tpgsi :1; /* implicit asymmetric lun access */
+X uchar_t inq_3pc :1; /* third-party copy */
+X uchar_t inq_protect :1; /* supports protection information */
+ uchar_t inq_bque :1; /* basic queueing */
+ uchar_t inq_encserv :1; /* embedded enclosure services */
+ uchar_t inq_dualp :1; /* dual port device */
+ uchar_t inq_mchngr :1; /* embedded/attached to medium chngr */
+ uchar_t inq_addr16 :1; /* SPI: supports 16 bit wide SCSI addr */
+ uchar_t inq_wbus16 :1; /* SPI: Supports 16 bit wide data xfers */
+ uchar_t inq_sync :1; /* SPI: Supports synchronous data xfers */
uchar_t inq_linked :1; /* Supports linked commands */
uchar_t inq_cmd_que :1; /* Supports command queueing */
uchar_t inq_sftre :1; /* Supports Soft Reset option */
@@ -36,6 +51,9 @@
char inq_vid[8]; /* Vendor ID */
char inq_pid[16]; /* Product ID */
char inq_revision[4]; /* Revision level */
+ uchar_t inq_clk :2; /* SPI3 clocking */
+ uchar_t inq_qas :1; /* SPI3: quick arb sel */
+ uchar_t inq_ius :1; /* SPI3: information units */
inq_dtype identifies the type of device. Bits 0 - 4
@@ -43,14 +61,9 @@
represent the Peripheral Qualifier. The following values are
appropriate for Peripheral Device Type field:
- "small and bold">DTYPE_AArrayCcontroller device (for exam-
- ple, RAID).
-
DTYPE_DIRECT Direct-access device (for example,
magnetic disk).
- DTYPE_ESI Enclosure services device.
-
DTYPE_SEQUENTIAL Sequential-access device (for exam-
ple, magnetic tape).
@@ -73,6 +86,19 @@
DTYPE_COMM Communications device.
+ DTYPE_ARRAY_CTRL Array Controller device (for exam-
+ ple, RAID).
+
+ DTYPE_ESI Enclosure services device.
+
+ DTYPE_RBC Simplified direct-access device
+
+ DTYPE_OCRW Optical card reader/writer device.
+
+ DTYPE_BRDIGE Bridge
+
+ DTYPE_OSD Object-based storage device.
+
DTYPE_UNKNOWN Unknown or no device type.
DTYPE_MASK Mask to isolate Peripheral Device
@@ -110,9 +136,9 @@
DPQ_VUNIQ This is a vendor-unique qualifier.
+ DPQ_MASK Mask to isolate Peripheral Qualifier
+ field.
-
-
DTYPE_NOTPRESENT is the peripheral qualifier DPQ_NEVER and
the peripheral device type DTYPE_UNKNOWN combined.
@@ -133,22 +159,58 @@
inq_trmiop, if set, indicates that the device supports the
TERMINATE I/O PROCESS message.
- inq_rdf, if reset, indicates the INQUIRY data format is as
- specified in SCSI-1.
+ inq_normaca, if set, indicates that the device supports
+ setting the NACA bit to 1 in CDB.
- inq_inq_len is the additional length field that specifies
- the length in bytes of the parameters.
+ inq_hisup, if set, indicates the SCSI target device uses
+ the hierarchical addressing model to assign LUNs to logical
+ units.
- inq_reladdr, if set, indicates that the device supports the
- relative addressing mode of this logical unit.
+ inq_rdf, indicates the INQUIRY data response data format:
+ RDF_LEVEL0 means that this structure complies with SCSI-1
+ spec, RDF_CCS means that this structure complies with CCS
+ pseudo-spec, and RDF_SCSI2 means that the structure
+ complies with the SCSI-2/3 spec.
- inq_wbus32, if set, indicates that the device supports 32-
- bit wide data transfers.
+ inq_inq_len is the additional length field that
+ specifies the length in bytes of the parameters.
- inq_wbus16, if set, indicates that the device supports 16-
- bit wide data transfers.
+ inq_sccs, if set, indicates the target device contains an
+ embedded storage array controller component.
- inq_sync, if set, indicates that the device supports syn-
+X inq_acc, if set, indicates that the logical unit contains
+X an access controls coordinator.
+
+ inq_tpgse, if set, indicates that implicit asymmetric
+ logical unit access is supported.
+
+ inq_tpgsi, if set, indicates that explicit asymmetric
+ logical unit access is supported.
+
+X inq_3pc, if set, indicates that the SCSI target device
+X supports third-party copy commands.
+
+X inq_protect, if set, that the logical unit supports protection
+X information.
+
+ inq_bque, if set, indicates that the logical unit supports
+ basic task management.
+
+ inq_encserv, if set, indicates that the device contains an
+ embedded enclosure services component (ses(7d)).
+
+ inq_dualp, if set, indicates the SCSI target device
+ supports two or more ports.
+
+ inq_mchngr, if set, indicates the SCSI target device
+ supports commands to control an attached media changer.
+
+ inq_addr16 device supports 16-bit wide SCSI addresses.
+
+ inq_wbus16, if set, indicates that the device supports
+ 16-bit wide data transfers.
+
+ inq_sync, if set, indicates that the device supports syn-
chronous data transfers.
inq_linked, if set, indicates that the device supports
@@ -162,19 +224,28 @@
this bit is set, this indicates that the device responds
with the soft RESET alternative.
- inq_vid contains eight bytes of ASCII data identifying the
+ inq_vid contains eight bytes of ASCII data identifying the
vendor of the product.
- inq_pid contains sixteen bytes of ASCII data as defined by
- the vendor.
-
- inq_revision contains four bytes of ASCII data as defined
+ inq_pid contains sixteen bytes of ASCII data as defined
by the vendor.
+ inq_revision contains four bytes of ASCII data as
+ defined by the vendor.
+
+ inq_clk clocking of SPI3 target port.
+
+ inq_qas SPI3 target port supports quick arbitration and
+ selection.
+
+ inq_ius SPI3 target device supports information unit transfers.
+
SEE ALSO
scsi_probe(9F), scsi_device(9S)
ANSI Small Computer System Interface-2 (SCSI-2)
+ ANSII SCSI Primary Commands - 3 (SPC-3)
+ http://t10.org/drafts.htm#spc3
Writing Device Drivers
