fas(7D) Devices fas(7D)NAMEfas - FAS SCSI Host Bus Adapter Driver
SYNOPSIS
fas@sbus-slot,0x8800000
DESCRIPTION
The fas Host Bus Adapter driver is a SCSA compliant nexus driver that
supports the Qlogic FAS366 SCSI chip.
The fas driver supports the standard functions provided by the SCSA
interface. The driver supports tagged and untagged queuing, wide and
fast SCSI, almost unlimited transfer size (using a moving DVMA window
approach), and auto request sense; but it does not support linked com‐
mands.
Driver Configuration
The fas driver can be configured by defining properties in fas.conf
which override the global SCSI settings. Supported properties are:
scsi-options, target<n>-scsi-options, scsi-reset-delay, scsi-watchdog-
tick, scsi-tag-age-limit, scsi-initiator-id.
target<n>-scsi-options overrides the scsi-options property value for
target<n>. <n> can vary from decimal 0 to 15. The supported scsi-
options are: SCSI_OPTIONS_DR, SCSI_OPTIONS_SYNC, SCSI_OPTIONS_TAG,
SCSI_OPTIONS_FAST, and SCSI_OPTIONS_WIDE.
After periodic interval scsi-watchdog-tick, the fas driver searches all
current and disconnected commands for timeouts.
scsi-tag-age-limit is the number of times that the fas driver attempts
to allocate a particular tag ID that is currently in use after going
through all tag IDs in a circular fashion. After finding the same tag
ID in use scsi-tag-age-limit times, no more commands will be submitted
to this target until all outstanding commands complete or timeout.
Refer to scsi_hba_attach(9F) for details.
EXAMPLES
Example 1 A sample of fas configuration file
Create a file called /kernel/drv/fas.conf and add this line:
scsi-options=0x78;
This disables tagged queuing, Fast SCSI, and Wide mode for all fas
instances. The following example disables an option for one specific
fas (refer to driver.conf(4) for more details):
name="fas" parent="/iommu@f,e0000000/sbus@f,e0001000"
reg=3,0x8800000,0x10,3,0x8810000,0x40
target1-scsi-options=0x58
scsi-options=0x178 scsi-initiator-id=6;
Note that the default initiator ID in OBP is 7 and that the change to
ID 6 will occur at attach time. It may be preferable to change the
initiator ID in OBP.
The example above sets scsi-options for target 1 to 0x58 and all other
targets on this SCSI bus to 0x178.
The physical pathname of the parent can be determined using the
/devices tree or following the link of the logical device name:
# ls -l /dev/rdsk/c1t3d0s0
lrwxrwxrwx 1 root other 78 Aug 28 16:05 /dev/rdsk/c1t3d0s0 ->
../../devices/iommu@f,e0000000 sbus@f,e0001000/SUNW,fas@3,8800000/sd@3,0:a,raw
Determine the register property values using the output from prt‐
conf(1M) (with the -v option):
SUNW,fas, instance #0
....
Register Specifications:
Bus Type=0x3, Address=0x8800000, Size=10
Bus Type=0x3, Address=0x8810000, Size=40
scsi-options can also be specified per device type using the device
inquiry string. All the devices with the same inquiry string will have
the same scsi-options set. This can be used to disable some scsi-
options on all the devices of the same type.
device-type-scsi-options-list=
"TOSHIBA XM5701TASUN12XCD", "cd-scsi-options";
cd-scsi-options = 0x0;
The above entry in /kernel/drv/fas.conf sets the scsi-options for all
devices with inquiry string TOSHIBA XM5701TASUN12XCD to cd-scsi-
options. To get the inquiry string, run the probe-scsi or probe-scsi-
all command at the ok prompt before booting the system.
To set scsi-options more specifically per target:
target1-scsi-options=0x78;
device-type-scsi-options-list =
"SEAGATE ST32550W", "seagate-scsi-options" ;
seagate-scsi-options = 0x58;
scsi-options=0x3f8;
The above sets scsi-options for target 1 to 0x78 and for all other tar‐
gets on this SCSI bus to 0x3f8 except for one specific disk type which
will have scsi-options set to 0x58.
scsi-options specified per target ID have the highest precedence, fol‐
lowed by scsi-options per device type. Global fas scsi-options (effect‐
ing all instances) per bus have the lowest precedence.
The system needs to be rebooted before the specified scsi-options take
effect.
Driver Capabilities
The target driver needs to set capabilities in the fas driver in order
to enable some driver features. The target driver can query and modify
these capabilities: synchronous, tagged-qing, wide-xfer, auto-rqsense,
qfull-retries, qfull-retry-interval. All other capabilities can only be
queried.
By default, tagged-qing, auto-rqsense, and wide-xfer capabilities are
disabled, while disconnect, synchronous, and untagged-qing are enabled.
These capabilities can only have binary values (0 or 1). The default
value for qfull-retries is 10 and the default value for qfull-retry-
interval is 100. The qfull-retries capability is a uchar_t (0 to 255)
while qfull-retry-interval is a ushort_t (0 to 65535).
The target driver needs to enable tagged-qing and wide-xfer explic‐
itly. The untagged-qing capability is always enabled and its value
cannot be modified, because fas can queue commands even when tagged-
qing is disabled.
Whenever there is a conflict between the value of scsi-options and a
capability, the value set in scsi-options prevails. Only whom != 0 is
supported in the scsi_ifsetcap(9F) call.
Refer to scsi_ifsetcap(9F) and scsi_ifgetcap(9F) for details.
FILES
/kernel/drv/fas ELF Kernel Module
/kernel/drv/fas.conf Optional configuration file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────────┬──────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────────┼──────────────────────────────────┤
│Architecture │Limited to Sparc SBus-based sys‐ │
│ │tems with FAS366-based SCSI port │
│ │and SunSWIFT SBus SCSI Host │
│ │Adapter/Fast Ethernet option. │
└────────────────────────┴──────────────────────────────────┘
SEE ALSOprtconf(1M), driver.conf(4), attributes(5), scsi_abort(9F),
scsi_hba_attach(9F), scsi_ifgetcap(9F), scsi_ifsetcap(9F),
scsi_reset(9F), scsi_sync_pkt(9F), scsi_transport(9F), scsi_device(9S),
scsi_extended_sense(9S), scsi_inquiry(9S), scsi_pkt(9S)
Writing Device Drivers
ANSI Small Computer System Interface-2 (SCSI-2)
QLogic Corporation, FAS366 Technical Manuals.
DIAGNOSTICS
The messages described below are some that may appear on the system
console, as well as being logged.
The first five messages may be displayed while the fas driver is try‐
ing to attach; these messages mean that the fas driver was unable to
attach. All of these messages are preceded by "fas%d", where "%d" is
the instance number of the fas controller.
Device in slave-only slot
The SBus device has been placed in a slave-only slot and will not
be accessible; move to non-slave-only SBus slot.
Device is using a hilevel intr
The device was configured with an interrupt level that cannot be
used with this fas driver. Check the SBus device.
Cannot alloc dma handle
Driver was unable to allocate memory for a DMA controller.
Cannot alloc cmd area
Driver was unable to allocate memory for a command address.
Cannot create kmem_cache
Driver was unable to allocate memory for internal data structures.
Unable to map FAS366 registers
Driver was unable to map device registers; check for bad hardware.
Driver did not attach to device; SCSI devices will be inaccessible.
Cannot add intr
Driver could not add its interrupt service routine to the kernel.
Cannot map dma
Driver was unable to locate a DMA controller. This is an auto-con‐
figuration error.
Cannot bind cmdarea
Driver was unable to bind the DMA handle to an address.
Cannot create devctl minor node
Driver is unable to create a minor node for the controller.
Cannot attach
The driver was unable to attach; usually follows another warning
that indicates why attach failed.
Disabled TQ since disconnects are disabled
Tagged queuing was disabled because disconnects were disabled in
scsi-options.
Bad clock frequency
Check for bad hardware.
Sync of pkt (<address>) failed
Syncing a SCSI packet failed. Refer to scsi_sync_pkt(9F).
All tags in use!
The driver could not allocate another tag number. The target
devices do not properly support tagged queuing.
Gross error in FAS366 status
The driver experienced severe SCSI bus problems. Check cables and
terminator.
Spurious interrupt
The driver received an interrupt while the hardware was not inter‐
rupting.
Lost state in phasemanage
The driver is confused about the state of the SCSI bus.
Unrecoverable DMA error during selection
The DMA controller experienced host SBus problems. Check for bad
hardware.
Bad sequence step (<step number>) in selection
The FAS366 hardware reported a bad sequence step. Check for bad
hardware.
Undetermined selection failure
The selection of a target failed unexpectedly. Check for bad hard‐
ware.
Target <n>: failed reselection (bad reselect bytes)
A reconnect failed, target sent incorrect number of message bytes.
Check for bad hardware.
Target <n>: failed reselection (bad identify message)
A reconnect failed, target didn't send identify message or it got
corrupted. Check for bad hardware.
Target <n>: failed reselection (not in msgin phase)
Incorrect SCSI bus phase after reconnection. Check for bad hard‐
ware.
Target <n>: failed reselection (unexpected bus free)
Incorrect SCSI bus phase after reconnection. Check for bad hard‐
ware.
Target <n>: failed reselection (timeout on receiving tag msg)
A reconnect failed; target failed to send tag bytes. Check for bad
hardware.
Target <n>: failed reselection (botched tag)
A reconnect failed; target failed to send tag bytes. Check for bad
hardware.
Target <n>: failed reselection (invalid tag)
A reconnect failed; target sent incorrect tag bytes. Check for bad
hardware.
Target <n>: failed reselection (Parity error in reconnect msg's)
A reconnect failed; parity error detected. Check for bad hardware.
Target <n>: failed reselection (no command)
A reconnect failed; target accepted abort or reset, but still tries
to reconnect. Check for bad hardware.
Unexpected bus free
Target disconnected from the bus without notice. Check for bad
hardware.
Target <n> didn't disconnect after sending <message>
The target unexpectedly did not disconnect after sending <message>.
Bad sequence step (0x?) in selection
The sequence step register shows an improper value. The target
might be misbehaving.
Illegal dma boundary?
An attempt was made to cross a boundary that the driver could not
handle.
Unwanted data xfer direction for Target <n>
The target went into an unexpected phase.
Unrecoverable DMA error on dma <send/receive>
There is a DMA error while sending/receiving data. The host DMA
controller is experiencing some problems.
SCSI bus DATA IN phase parity error
The driver detected parity errors on the SCSI bus.
SCSI bus MESSAGE IN phase parity error
The driver detected parity errors on the SCSI bus.
SCSI bus STATUS phase parity error
The driver detected parity errors on the SCSI bus.
Premature end of extended message
An extended SCSI bus message did not complete. Suspect a target
firmware problem.
Premature end of input message
A multibyte input message was truncated. Suspect a target firmware
problem.
Input message botch
The driver is confused about messages coming from the target.
Extended message <n> is too long
The extended message sent by the target is longer than expected.
<name> message <n> from Target <m> garbled
Target <m> sent message <name> of value <n> which the driver did
not understand.
Target <n> rejects our message <name>
Target <n> rejected a message sent by the driver.
Rejecting message <name> from Target <n>
The driver rejected a message received from target <n>.
Cmd transmission error
The driver was unable to send out command bytes.
Target <n> refused message resend
The target did not accept a message resend.
MESSAGE OUT phase parity error
The driver detected parity errors on the SCSI bus.
Two byte message <name> <value> rejected
The driver does not accept this two byte message.
Gross error in fas status <stat>
The fas chip has indicated a gross error like FIFO overflow.
Polled cmd failed (target busy)
A polled command failed because the target did not complete out‐
standing commands within a reasonable time.
Polled cmd failed
A polled command failed because of timeouts or bus errors.
Auto request sense failed
Driver is unable to get request sense from the target.
Disconnected command timeout for Target <id>.<lun>
A timeout occurred while target id/lun was disconnected. This is
usually a target firmware problem. For tagged queuing targets, <n>
commands were outstanding when the timeout was detected.
Disconnected tagged cmds (<n>) timeout for Target <id>.<lun>
A timeout occurred while target id/lun was disconnected. This is
usually a target firmware problem. For tagged queuing targets, <n>
commands were outstanding when the timeout was detected.
Connected command timeout for Target <id>.<lun>
This is usually a SCSI bus problem. Check cables and termination.
Target <id>.<lun> reverting to async. mode
A data transfer hang was detected. The driver attempts to eliminate
this problem by reducing the data transfer rate.
Target <id>.<lun> reducing sync. transfer rate
A data transfer hang was detected. The driver attempts to eliminate
this problem by reducing the data transfer rate.
Reverting to slow SCSI cable mode
A data transfer hang was detected. The driver attempts to eliminate
this problem by reducing the data transfer rate.
Target <id> reducing sync. transfer rate
A data transfer hang was detected. The driver attempts to eliminate
this problem by reducing the data transfer rate.
Target <id> reverting to async. mode
A data transfer hang was detected. The driver attempts to eliminate
this problem by reducing the data transfer rate.
Target <id> disabled wide SCSI mode
Due to problems on the SCSI bus, the driver goes into more conser‐
vative mode of operation to avoid further problems.
Reset SCSI bus failed
An attempt to reset the SCSI bus failed.
External SCSI bus reset
Another initiator reset the SCSI bus.
WARNINGS
The fas hardware (FAS366) supports both Wide and Fast SCSI mode, but
fast20 is not supported. The maximum SCSI bandwidth is 20 MB/sec. Ini‐
tiator mode block sequence (IBS) is not supported.
NOTES
The fas driver exports properties indicating per target the negotiated
transfer speed (target<n>-sync-speed), whether wide bus is supported
(target<n>-wide), scsi-options for that particular target (tar‐
get<n>-scsi-options), and whether tagged queuing has been enabled (tar‐
get<n>-TQ). The sync-speed property value is the data transfer rate in
KB/sec. The target<n>-TQ and the target<n>-wide property have value 1
to indicate that the corresponding capability is enabled, or 0 to indi‐
cate that the capability is disabled for that target. Refer to prt‐
conf(1M) (verbose option) for viewing the fas properties.
SUNW,fas,instance #1
Driver software properties:
name <target3-TQ> length <4>
value <0x00000001>.
name <target3-wide> length <4>
value <0x00000000>.
name <target3-sync-speed> length <4>
value <0x00002710>.
name <target3-scsi-options> length <4>
value <0x000003f8>.
name <target0-TQ> length <4>
value <0x00000001>.
name <pm_norm_pwr> length <4>
value <0x00000001>.
name <pm_timestamp> length <4>
value <0x30040346>.
name <scsi-options> length <4>
value <0x000003f8>.
name <scsi-watchdog-tick> length <4>
value <0x0000000a>.
name <scsi-tag-age-limit> length <4>
value <0x00000002>.
name <scsi-reset-delay> length <4>
value <0x00000bb8>.
Register Specifications:
Bus Type=0x3, Address=0x8800000, Size=10
Bus Type=0x3, Address=0x8810000, Size=40
Interrupt Specifications:
Interrupt Priority=0x35 (ipl 5)
SunOS 5.11 20 Jun 1997 fas(7D)
